Patent Publication Number: US-9851691-B2

Title: Detachably mountable process cartridge with a rotational force driving assembly

Description:
RELATED U.S. APPLICATION DATE 
     This application is a continuation of U.S. patent application Ser. No. 15/015,241, filed on Feb. 4, 2016, which is a continuation in part of application Ser. No. 14/496,379, filed on Sep. 25, 2014 (now U.S. Pat. No. 9,280,121, issued on Mar. 8, 2016), a continuation of PCT/CN2015/084489, filed on Jul. 20, 2015, a continuation of PCT/CN2015/092715, filed on Oct. 23, 2015, and a continuation of PCT/CN2015/096280, filed on Dec. 3, 2015. 
    
    
     FIELD OF TECHNOLOGY 
     The present invention relates to a process cartridge for an electrophotographic image forming device, and particularly relates to a rotational force driving assembly in the process cartridge. 
     BACKGROUND 
     A process cartridge in the prior art is detachably installed in an electrophotographic image forming device. Said electrophotographic image forming device is internally provided with a rotational force driving head. Said process cartridge comprises a photosensitive member for bearing an image carrier and a photosensitive member hub provided at one end of said photosensitive member, inclined teeth are arranged on the outer circumference of said photosensitive member hub, the interior of the photosensitive member hub is provided with a cavity, and meanwhile a rotational driving force receiver which is capable of being engaged with a rotational force driving head inside said electrophotographic image forming device and is used for transmitting rotational force to said photosensitive member is arranged on the photosensitive member hub. 
       FIG. 1  to  FIG. 2  illustrates the engaging process of the rotational force driving head and the rotational driving force receiving head in the prior art. As shown in  FIG. 1 a   ,  11  is the rotational force driving head in the electrophotographic image forming device, and transmission pins  111  for transmitting force are arranged on the rotational force driving head;  201  is a photosensitive member arranged in the process cartridge,  202  is a photosensitive member hub provided at one end of said photosensitive member, and  203  is the rotational driving force receiving head arranged on said photosensitive member hub; a force transmission part  2032  capable of being engaged with said photosensitive member hub to transmit force and a force receiving part  2031  capable of being engaged with the transmission pins  111  on said rotational force driving head  11  to transmit the force are arranged on said rotational driving force receiving head. During the process that the process cartridge is installed in the electrophotographic image forming device, the rotational driving force receiving head needs to be inclined (as shown in  FIG. 1 a   ) relative to the axis L 1  of said photosensitive member in advance. As shown in  FIG. 1 a   , during the installation process of the process cartridge, the looseness of internal parts of the electrophotographic image forming device is caused by assembly error; during the installation process of the process cartridge, the part, close to the rotational force driving head, of the rotational driving force receiving head  203  may interfere with said rotational force driving head, while along with continuous installation of the process cartridge, the rotational force driving head  11  promotes the rotational driving force receiving head to be straightened, but if the rotational force receiving head  11  is incapable of being engaged with the rotational driving force receiving head  203  normally, the process cartridge cannot be installed in place, the condition as shown in  FIG. 1 b    may appear, and thus normal engagement between the rotational driving head  11  and the rotational driving force receiving head  203  as shown in  FIG. 2  cannot be realized. 
     SUMMARY 
     The primary object of the present invention is to provide a rotational force driving assembly capable of solving the above described problem of the conventional rotational driving force receiver. 
     Another object of the present invention is to provide a photosensitive member, a rotational force driving assembly used in photosensitive member, capable of solving the above described problem of the conventional photosensitive member. 
     A further object of the present invention is to provide a process cartridge, a rotational force driving assembly used in the process cartridge, capable of solving the above described problem of the conventional process cartridge. 
     In order to achieve the all above objects, a rotational force driving assembly provided in the present invention comprising a hub, a rotational force receiving component for driving the hub to rotate and a side plate provided at one end of the hub. The rotational force driving assembly further comprising an axis offset adjusting mechanism. Two ends of the axis offset adjusting mechanism can be respectively connected with the hub and the rotational force receiving component which is provided on the side plate and can slide relative to the side plate. When the rotational force driving assembly is not subjected to external force, the axis offset adjusting mechanism enables the axis of the rotational force receiving component to make parallel offset relative to the axis of the hub. After the rotational force driving assembly is installed in place in the electrophotographic image forming device, the axis offset adjusting mechanism is subjected to the external force to move relative to the side plate, so that the axis of the rotational force receiving component is coincident with the axis of the hub, and the rotational force receiving component extends out along the axial direction of the hub to be engaged with a rotational force driving head. 
     A further plan is to provide the driving assembly further comprising an intermediate force transmission component, and the intermediate force transmission component is mutually engaged with the rotational force receiving component and the hub to transmit force. 
     A further plan is to provide the axis offset adjusting mechanism comprises a sliding piece and a first elastic element. The sliding piece is connected with the rotational force receiving component. The first elastic element respectively abuts against the plate and the sliding piece. When the rotational force driving assembly is not subjected to external force, the first elastic element enables the sliding piece to make parallel offset relative to the axis of the hub. After the rotational force driving assembly is installed in place in the electrophotographic image forming device, the sliding piece is subjected to the external force to move relative to the side plate, so that the rotational force receiving component extends out along the axial direction of the hub to be engaged with the rotational force driving head. 
     A further plan is to provide A sliding rail is arranged on the side plate. A sliding piece is connected with the side plate through the sliding rail. A handle end matched with the sliding rail is arranged on the sliding piece, and an accommodating groove for accommodating the first elastic element is formed in the handle end. 
     A further plan is to provide the intermediate force transmission component comprises a first end spherical part, a second end spherical part and an intermediate connecting part. The first end spherical part is provided with a first force transmission part capable of being engaged with the hub. The second end spherical part is provided with a second force transmission part capable of being engaged with the rotational force receiving component. 
     A further plan is to provide the rotational force driving assembly further comprising a second elastic element arranged between the intermediate force transmission component and the hub. The intermediate force transmission component is arranged in the hub. The sliding piece comprises an inner hole. A cylinder part is arranged at one end of the rotational force receiving component. The cylinder part is matched with the inner hole of the sliding piece. 
     A further plan is to provide the rotational force driving assembly further comprising a second elastic element arranged between the intermediate force transmission component and the hub. The intermediate force transmission component is arranged in the hub. The sliding piece is provided with the bottom surface and the inner hole. The rotational force receiving component is arranged to be matched with the inner hole and can axially slide relative to the inner hole. The bottom surface abuts against the intermediate force transmission component. The intermediate force transmission component is at the retracting state when the bottom surface abuts against the intermediate force transmission component. 
     A further plan is to provide a recess is formed in one end of the rotational force receiving component. The intermediate force transmission component comprises an end spherical part. The buffer piece is provided in the recess. The end spherical part abuts against the buffer piece. The rotational force receiving component and the intermediate force transmission component are connected through a pin or a latch. 
     A further plan is to provide the rotational force driving assembly further comprises a connecting column and a connecting pin. The connecting pin penetrates through a hole for connecting the intermediate force transmission component and the connecting column. The connecting column is connected to the hub. 
     A further plan is to provide the rotational force driving assembly further comprise guiding mechanisms. The guiding mechanisms are arranged on the connecting column and the hub so that the connecting column is installed inside the hub along the guiding mechanisms. 
     A process cartridge provided in the present invention comprises a cartridge, a rotational force driving assembly used for being engaged with a rotational force driving head inside an electrophotographic image forming device so as to transmit rotational driving force. The rotational force driving assembly comprising a hub, a rotational force receiving component for driving the hub to rotate and a side plate provided at one end of the hub. The rotational force driving assembly further comprising an axis offset adjusting mechanism. Two ends of the axis offset adjusting mechanism can be respectively connected with the hub and the rotational force receiving component which is provided on the side plate and can slide relative to the side plate. When the rotational force driving assembly is not subjected to external force, the axis offset adjusting mechanism enables the axis of the rotational force receiving component to make parallel offset relative to the axis of the hub. After the rotational force driving assembly is installed in place in the electrophotographic image forming device, the axis offset adjusting mechanism is subjected to the external force to move relative to the side plate, so that the axis of the rotational force receiving component is coincident with the axis of the hub, and the rotational force receiving component extends out along the axial direction of the hub to be engaged with a rotational force driving head. 
     After the technical scheme is adopted, the intermediate force transmission component capable of being engaged with the hub and the rotational force receiving component at the two ends respectively, the sliding piece arranged on the side plate and capable of sliding relative to the side plate, and the first elastic element abutting against the side plate and the sliding piece respectively are additionally arranged, the rotational force receiving component is matched with the sliding piece, when the rotational force driving assembly is not subjected to external force, the axis of the rotational force receiving component and the axis of the hub are enabled to make parallel offset under the elastic effect of the first elastic element, and after the rotational force driving assembly is installed in place in the electrophotographic image forming device, the elastic effect of the first elastic element is overcome, so that the sliding piece slides to the axis of the rotational force receiving component to be coincident with the axis of the hub, two ends of the intermediate force transmission component are respectively engaged with the hub and the rotational force receiving component, and the rotational force receiving component extends out along the axial direction of the hub to be engaged with the rotational force driving head so as to drive the hub to rotate. Namely, when the rotational force receiving component is driven to move on the surface of the side plate to the axis of the rotational force receiving component through the sliding of the sliding piece to be coincident with the axis of the hub, the rotational force receiving component completely extends out to be engaged with the rotational force driving head inside the electrophotographic image forming device so as to transmit the rotational driving force, and thus interference cannot occur during the installation process and the technical problem that installation interference between the rotational force driving assembly and the rotational force driving head is solved. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWING(S) 
         FIG. 1 a    illustrates a structural schematic diagram of the prior art. 
         FIG. 1 b    illustrates a schematic diagram of interference in the prior art. 
         FIG. 2  illustrates a schematic diagram of engagement realized by a force transmission mechanism in the prior art. 
         FIG. 3  illustrates a stereo view of a process cartridge in the present invention. 
         FIG. 4  illustrates a partial section view of the process cartridge in the present invention. 
         FIG. 5  illustrates an assembly schematic diagram of a first embodiment in the present invention. 
         FIG. 6  illustrates a stereo view of a force transmission part in the first embodiment of the present invention. 
         FIG. 7  illustrates a stereo view of a driving assembly at an initial state in the first embodiment. 
         FIG. 8  illustrates a section view of  FIG. 7 . 
         FIG. 9  illustrates a stereo view of the driving assembly at a working state in the first embodiment. 
         FIG. 10  illustrates a section view of  FIG. 9 . 
         FIG. 11 a    illustrates a schematic diagram of the installation process of a process cartridge in the first embodiment. 
         FIG. 11 b    illustrates a schematic diagram of the installation process of the process cartridge in the first embodiment. 
         FIG. 11 c    illustrates a schematic diagram that the process cartridge is installed in place in the first embodiment. 
         FIG. 12 a    illustrates a schematic diagram of the disassembly process of the process cartridge in the first embodiment. 
         FIG. 12 b    illustrates a schematic diagram of the disassembly process of the process cartridge in the first embodiment. 
         FIG. 12 c    illustrates a schematic diagram of the disassembly process of the process cartridge in the first embodiment. 
         FIG. 13  illustrates a section view of a second embodiment in the present invention. 
         FIG. 14  illustrates a structure view of the force transmission part in the second embodiment. 
         FIG. 15  illustrates an engaged cross section view of the force transmission part in the second embodiment. 
         FIG. 16 a    illustrates a schematic diagram of the installation process of the process cartridge in the second embodiment. 
         FIG. 16 b    illustrates a schematic diagram of the installation process of the process cartridge in the second embodiment. 
         FIG. 16 c    illustrates a schematic diagram that the process cartridge is installed in place in the second embodiment. 
         FIG. 17 a    illustrates a schematic diagram of the disassembly process of the process cartridge in the second embodiment. 
         FIG. 17 b    illustrates a schematic diagram of the disassembly process of the process cartridge in the second embodiment. 
         FIG. 17 c    illustrates a schematic diagram of the disassembly process of the process cartridge in the second embodiment. 
         FIG. 18  illustrates a section view of a third embodiment in the present invention. 
         FIG. 19  illustrates a structure view of the force transmission part in the third embodiment. 
         FIG. 20 a    illustrates a schematic diagram of the installation process of the process cartridge in the third embodiment. 
         FIG. 20 b    illustrates a schematic diagram of the installation process of the process cartridge in the third embodiment. 
         FIG. 20 c    illustrates a schematic diagram that the process cartridge is installed in place in the third embodiment. 
         FIG. 21 a    illustrates a schematic diagram of the disassembly process of the process cartridge in the third embodiment. 
         FIG. 21 b    illustrates a schematic diagram of the disassembly process of the process cartridge in the third embodiment. 
         FIG. 21 c    illustrates a schematic diagram of the disassembly process of the process cartridge in the third embodiment. 
         FIG. 22  and  FIG. 23  illustrate structural views of a rotational force receiving component and an intermediate force transmission component in the fourth embodiment. 
         FIG. 24  and  FIG. 25  illustrate an action schematic diagram of the rotational force receiving component and the intermediate force transmission component in the fourth embodiment. 
         FIG. 26  illustrates a partial assembly schematic diagram of the driving assembly in a fifth embodiment. 
         FIG. 27  illustrates a partial section view of the driving assembly in the fifth embodiment. 
         FIG. 28  is a schematic sectional diagram of a process cartridge from Embodiment Six in Embodiment Eleven; 
         FIG. 29  is a schematic structural diagram of the process cartridge and its rotational force driving assembly in Embodiment Six to Embodiment Eleven; 
         FIG. 30  is a schematic structural diagram of the process cartridge and its rotational force driving assembly in Embodiment Six; 
         FIG. 31 a    and  FIG. 31 b    are schematic structural diagrams of a coupling component of the rotational force driving assembly in Embodiment Six; 
         FIG. 32  is a schematic structural diagram of a pressing component of the rotational force driving assembly in Embodiment Six; 
         FIG. 33  is a schematic structural diagram of a sliding part of the rotational force driving assembly in Embodiment Six; 
         FIG. 34 a    and  FIG. 34 b    are schematic structural diagrams of a baffle plate of the rotational force driving assembly in Embodiment Six; 
         FIG. 35 a    and  FIG. 35 b    are schematic structural diagrams of a transmitting component of the rotational force driving assembly in Embodiment Six; 
         FIG. 36  is a schematic sectional diagram of the rotational force driving assembly in Embodiment Six; 
         FIG. 37 a    and  FIG. 37 b    are schematic diagrams of the movement of the coupling component of the rotational force driving assembly in a direction in Embodiment Six; 
         FIG. 38 a   ,  FIG. 38 b    and  FIG. 38 c    are schematic diagrams of the movement of the coupling component of the rotational force driving assembly in another direction in Embodiment Six; 
         FIG. 39  and  FIG. 40  are schematic diagrams showing that the process cartridge is installed into an electrophotographic image forming device in Embodiment Six; 
         FIG. 41 a   ,  FIG. 41 b    and  FIG. 41 c    are schematic structural diagrams of the rotational force driving assembly and the front end of a guide rail in Embodiment Six; 
         FIG. 42 a    and  FIG. 42 b    are schematic diagrams showing that a pressed portion of the rotational force driving assembly is pressed by the front end of the guide rail in Embodiment Six; 
         FIG. 43  is a schematic diagram showing that the pressed portion of the rotational force driving assembly is pressed by the back end of the guide rail in Embodiment Six; 
         FIG. 44 a    and  FIG. 44 b    are schematic diagrams showing that the coupling component of the rotational force driving assembly stretches and engages with a driving head in Embodiment Six; 
         FIG. 45  is a schematic diagram showing the tight engagement state between the coupling component of the rotational force driving assembly and the driving head in Embodiment Six; 
         FIG. 46  is a schematic structural diagram of a rotational force driving assembly in Embodiment Seven; 
         FIG. 47 a   ,  FIG. 47 b    and  FIG. 47 c    are schematic structural diagrams of a transmitting component in Embodiment Seven; 
         FIG. 48  is a schematic diagram showing that a connecting part is in the transmitting component in Embodiment Seven; 
         FIG. 49  is a schematic diagram showing a movement of the connecting part in the transmitting component in Embodiment Seven; 
         FIG. 50  is a schematic diagram showing another movement of the connecting part in the transmitting component in Embodiment Seven; 
         FIG. 51  and  FIG. 52  are schematic diagrams showing movements of the connecting part in the transmitting component in Embodiment Seven; 
         FIG. 53  is a schematic structural diagram of a rotational force driving assembly in Embodiment Eight; 
         FIG. 54  is a schematic structural diagram of a connecting part in Embodiment Eight; 
         FIG. 55  is a schematic structural diagram of a transmitting component in Embodiment Eight; 
         FIG. 56  is a schematic sectional diagram of a rotational force driving assembly in Embodiment Eight; 
         FIG. 57 a   ,  FIG. 57 b    and  FIG. 57 c    are schematic diagrams showing the movement of a coupling component when connecting with the connecting part in Embodiment Eight; 
         FIG. 58  is a schematic structural diagram of a rotational force driving assembly in Embodiment Nine; 
         FIG. 59 a    and  FIG. 59 b    are schematic structural diagrams of a coupling component in Embodiment Nine; 
         FIG. 60 a    and  FIG. 60 b    are schematic structural diagrams of a connecting part and a connecting portion in Embodiment Nine; 
         FIG. 61 a    and  FIG. 61 b    are schematic structural diagrams of a transmitting component in Embodiment Nine; 
         FIG. 62 a    and  FIG. 62 b    are schematic diagrams showing the movement of the coupling component with respect to the transmitting component in Embodiment Nine; 
         FIG. 63  is a schematic structural diagram of a rotational force driving assembly in Embodiment Ten; 
         FIG. 64  is a schematic structural diagram of a pressing plate in Embodiment Ten; 
         FIG. 65  is a schematic diagram showing the movement of a coupling component with respect to a transmitting component in Embodiment Ten; 
         FIG. 66 a    and  FIG. 66 b    are schematic diagrams showing the process of removing the process cartridge from an electrophotographic image forming device in Embodiment Ten; 
         FIG. 67  is a schematic structural diagram of a rotational force driving assembly in Embodiment Eleven; 
         FIG. 68 a    and  FIG. 68 b    are schematic structural diagrams of a transmitting component in Embodiment Eleven; 
         FIG. 69  is a schematic diagram showing the movement of a coupling component with respect to a transmitting component in Embodiment Eleven; 
         FIG. 70 a   ,  FIG. 70 b    and  FIG. 70 c    are schematic structural diagrams of a limiting protrusion in Embodiment Six to Embodiment Eleven; 
         FIG. 71  is a schematic diagram of the installation direction and the removing direction of the process cartridge in Embodiment Six to Embodiment Eleven; 
         FIG. 72 a    and  FIG. 72 b    are schematic structural diagrams of the stretchable limiting protrusion in Embodiment Six to Embodiment Eleven; 
         FIG. 73  is a schematic structural diagram of a catching portion of the process cartridge in Embodiment Six to Embodiment Eleven; 
         FIG. 74  is a schematic structural diagram of a process cartridge in Embodiment Twelve; 
         FIG. 75  is a schematic local diagram of the process cartridge in Embodiment Twelve; 
         FIG. 76  is a schematic decomposition diagram of a rotational force driving assembly, a side plate and a rotating member of the process cartridge in Embodiment Twelve; 
         FIG. 77  is a schematic structural diagram of the rotational force driving assembly of the process cartridge in a first state in Embodiment Twelve; 
         FIG. 78  is a schematic exploded diagram of the rotational force driving assembly, the side plate and the rotating member of the process cartridge in Embodiment Twelve; 
         FIG. 79  is a schematic structural diagram of a rotational force driving assembly of a process cartridge in a second state in Embodiment Thirteen; 
         FIG. 80  is a schematic structural diagram of an adjusting mechanism in the rotational force driving assembly of the process cartridge in Embodiment Thirteen; 
         FIG. 81  is a schematic structural diagram of a side plate of the process cartridge in Embodiment Thirteen; 
         FIG. 82  is a stereo diagram of the process cartridge; 
         FIG. 83  is a stereo diagram of a rotational force driving assembly in Embodiment Fourteen; 
         FIG. 84  is an exploded diagram of the rotational force driving assembly in Embodiment Fourteen; 
         FIG. 85  is a schematic assembling drawing of the rotational force driving assembly in Embodiment Fourteen; 
         FIG. 86  is a stereo diagram of a rotational force receiving component in Embodiment Fourteen; 
         FIG. 87  is a sectional diagram of the rotational force receiving component in Embodiment Fourteen; 
         FIG. 88  is a stereo diagram of a flexible shaft in Embodiment Fourteen; 
         FIG. 89  is a stereo diagram of a flexible shaft in Embodiment Fourteen; 
         FIG. 90  is a sectional diagram of a portion of the flexible shaft in Embodiment Fourteen; 
         FIG. 91  is a stereo diagram of a wedge base in Embodiment Fourteen; 
         FIG. 92  is a stereo diagram of a side plate in Embodiment Fourteen; 
         FIG. 93  is a diagram of the side plate diagramming from another bottom direction in Embodiment Fourteen; 
         FIG. 94  is a sectional diagram along bB-bB shown in  FIG. 92 ; 
         FIG. 95  is a sectional diagram along bA-bA shown in  FIG. 85 ; 
         FIG. 96 a    to  FIG. 96 d    are diagrams showing a change of relative position between a rotational force driving assembly and a rotational force driving head in an electrophotographic image forming device when the process cartridge is installed into the electrophotographic image forming device in Embodiment Fourteen; 
         FIG. 97 a    to  FIG. 97 d    are diagrams showing a change of relative position between the rotational force driving assembly and the rotational force driving head in the electrophotographic image forming device when the process cartridge is removed from the electrophotographic image forming device; 
         FIG. 98  is a schematic diagram showing the relative movement between the wedge base and the side plate during the engaging process of the rotational force driving assembly and the rotational force driving head in the electrophotographic image forming device; 
         FIG. 99  is a schematic diagram showing the relative movement between the wedge base and the side plate during the engaging process of the rotational force driving assembly and the rotational force driving head in the electrophotographic image forming device; 
         FIG. 100  is a schematic diagram showing the relative movement between the wedge base and the side plate during the engaging process of the rotational force driving assembly and the rotational force driving head in the electrophotographic image forming device; 
         FIG. 101  is a schematic diagram showing the relative movement between the wedge base and the side plate during the engaging process of the rotational force driving assembly and the rotational force driving head in the electrophotographic image forming device; 
         FIG. 102  is a schematic diagram showing the relative movement between the wedge base and the side plate during the engaging process of the rotational force driving assembly and the rotational force driving head in the electrophotographic image forming device; 
         FIG. 103  is a schematic diagram showing the relative movement between the wedge base and the side plate during the disengaging process of the rotational force driving assembly and the rotational force driving head in the electrophotographic image forming device; 
         FIG. 104  is a schematic structural diagram of a process cartridge in Embodiment Fifteen; 
         FIG. 105  is a schematic exploded diagram of the process cartridge in  FIG. 104 ; 
         FIG. 106  is a sectional diagram of a driving assembly and a supporting part in the process cartridge in Embodiment Fifteen; 
         FIG. 107  is a schematic structural diagram of a photosensitive drum assembly in Embodiment Fifteen; 
         FIG. 108  is a schematic structural diagram of the driving assembly in Embodiment Fifteen; 
         FIG. 109  is a schematic exploded diagram of the driving assembly in Embodiment Fifteen; 
         FIG. 110  is a schematic structural diagram of a driving component in the driving assembly in Embodiment Fifteen; 
         FIG. 111  is a schematic structural diagram of a first part of a coupling in the driving assembly in Embodiment Fifteen; 
         FIG. 112  is a schematic structural diagram of a hub in the driving assembly in Embodiment Fifteen; 
         FIG. 113  is a schematic structural diagram of a latching spring in the driving assembly in Embodiment Fifteen; 
         FIG. 114  is a schematic decomposition diagram of a driving assembly in Embodiment Sixteen; 
         FIG. 115  is a schematic structural diagram of a driving component in the driving assembly in Embodiment Sixteen; 
         FIG. 116  is a schematic structural diagram of a third part in the driving assembly in Embodiment Sixteen; 
         FIG. 117  is an assembling drawing of the third part, a blocking part and a spring in the driving assembly in Embodiment Sixteen; 
         FIG. 118  is a schematic structural diagram of a hub in the driving assembly in Embodiment Sixteen; 
         FIG. 119  is a schematic structural diagram of an electrophotographic image forming device in Embodiment Seventeen; 
         FIG. 120  is a schematic structural diagram of a guide rail in the electrophotographic image forming device in Embodiment Seventeen; 
         FIG. 121  is a schematic structural diagram of a protrusion in the electrophotographic image forming device in Embodiment Seventeen; 
         FIG. 122  is a schematic structural diagram showing that a process cartridge is in a first state in the electrophotographic image forming device in Embodiment Seventeen; 
         FIG. 123  is a schematic locally enlarged diagram of  FIG. 122 ; 
         FIG. 124  is a schematic structural diagram showing that the process cartridge is in a second state in the electrophotographic image forming device in Embodiment Seventeen; 
         FIG. 125  is a schematic locally enlarged diagram of  FIG. 124 ; 
         FIG. 126  is a schematic structural diagram showing that the process cartridge is in a third state in the electrophotographic image forming device in Embodiment Seventeen; 
         FIG. 127  is a schematic local diagram showing that a process cartridge is in a first state in an electrophotographic image forming device in Embodiment Eighteen; 
         FIG. 128  is a schematic local diagram showing that the process cartridge is in a second state in the electrophotographic image forming device in Embodiment Eighteen. 
     
    
    
     DETAILED DESCRIPTION 
     The following specifically illustrates the technical scheme of the present invention in combination with embodiments. 
     Embodiment 1 
       FIG. 3  to  FIG. 12  illustrate the first embodiment of the present invention. 
       FIG. 3  illustrates a stereo view of a process cartridge  2 ,  21  is a rotational force driving assembly provided at one end of the process cartridge in the longitudinal direction, and the driving assembly  21  is provided at one end of a photosensitive member. The longitudinal direction of the illustrated process cartridge  2  is the X-coordinate direction in diagram form, the photosensitive member is arranged along the longitudinal direction of said process cartridge, and thus the axial direction of said photosensitive member is the same as the X-axis direction; Y direction is another direction vertical to the X direction, namely the installation direction of the process cartridge during the process that the process cartridge is installed in the electrophotographic image forming device in the scheme; Z direction is a direction vertical to the X direction and the Y direction respectively. 
       FIG. 4  is a partial section view of the process cartridge cut along the L 1 -axis direction of said photosensitive member, and can clearly show the setting condition of said driving assembly  21  in the process cartridge  2 . As shown in the figure,  211  is the photosensitive member arranged inside the process cartridge along the longitudinal direction of said process cartridge;  212  is a photosensitive member hub provided at one end of said photosensitive member, an inclined gear for transmitting force is arranged on the outer circumference of said photosensitive member hub, a cavity is formed in the interior of the photosensitive member hub, and said photosensitive member and said photosensitive member hub are relatively and fixedly connected and are coaxially arranged;  213  is an intermediate force transmission component of the driving assembly in the embodiment, and  214  is a rotational force receiving component used for being engaged with a rotational force driving head arranged inside the electrophotographic image forming device to transmit force, wherein one end of the intermediate force transmission component  213  is arranged inside the cavity of said photosensitive member hub and is engaged with said photosensitive member hub  212  to transmit the force, and the other end of the intermediate force transmission component  213  is engaged with said rotational force receiving component  214  to transmit the force;  215  is a side plate provided at one end of said photosensitive member hub  212 , and  216  is a sliding piece which is arranged on the side plate and can slide relative to said side plate  215 ; and  217  is a first elastic element capable of enabling said sliding piece  216  to recover to the initial state. 
     After said rotational force receiving component  214  is engaged with the rotational force driving head  11  inside the electrophotographic image forming device, the force is transmitted to said photosensitive member hub  212  through said intermediate force transmission component  213 , and thus said photosensitive member  211  is driven to rotate. 
     Said driving assembly in the present invention comprises the photosensitive member hub, the intermediate force transmission component, the rotational force receiving component, the side plate and the axis offset adjusting mechanism; said axis offset adjusting mechanism is provided on said side plate and can slide relative to said side plate, and said axis offset adjusting mechanism comprises said sliding piece and said first elastic element. 
       FIG. 5  is an assembly decomposition view of the driving assembly  21  in the embodiment. The photosensitive member hub  212  is provided on the end of the photosensitive member  211 , one end of the intermediate force transmission component  213  is connected with said photosensitive member hub  212 , and the other end of the intermediate force transmission component  213  is connected with said rotational force receiving component  214 ; the rotational force receiving component  214  is provided with a claw  2141  for receiving the force, a cylinder part  2142  and a boss part  2143 , said boss part is used for preventing the rotational force receiving component  214  from disengaging; the side plate  215  is provided at one end of said photosensitive member hub  212 , a sliding rail  2151  is arranged on the side plate  215 , the sliding piece  216  is arranged on said side plate  215 , and the side plate  215  does not move relative to the photosensitive member hub  212 ; the sliding piece  216  is provided with a handle end  2161  matched with said sliding rail  2151 , an accommodating groove  2162  of the first elastic element  217  is further formed in the handle end  2161 , an inner hole  2163  which is matched with said rotational force receiving component  214  and can drive the rotational force receiving component  214  to move is further formed in the sliding piece  216 , the inner hole  2163  is matched with the cylinder part  2142  on the rotational force receiving component, and said cylinder part  2142  can slide along the axial direction of the photosensitive member relative to the inner hole  2163 ; according to the embodiment, the handle end  2161  of the sliding piece and the first elastic element  217  are further limited in the sliding rail  2151  of the side plate  215  through a compressing piece  218 , the compressing piece  218  and the side plate  215  are relatively and fixedly arranged or a compressing part is arranged on the side plate  215 ; said sliding rail can be arranged to be a sliding groove and can also be a key, and a matched sliding groove is arranged on the sliding piece  215  correspondingly, so that the sliding piece  216  can slide relative to the side plate  215 . 
       FIG. 6  is used for specifically illustrating connection relation among the intermediate force transmission component  213 , the photosensitive member hub  212  and the rotational force receiving component  214 . As shown in  FIG. 6 , the photosensitive member hub  212  is provided with a plurality of stress columns  2121  in the inner circumference direction; the intermediate force transmission component  213  comprises a first end spherical part  2131 , a second end spherical part  2133  and an intermediate connecting part  2132 , wherein a first force transmission part  21311  and a second force transmission part  21331  are respectively arranged on the first end spherical part  2131  and the second end spherical part  2133 , and said force transmission parts  21311  and  21331  extend out along the radial direction of said intermediate force transmission component  213 ; the interior of the rotational force receiving component  214  is hollow, the symmetrically arranged claw  2141  in the circumference direction for receiving the force is arranged at the end of the rotational force receiving component  214 , and a plurality of stress parts  2144  are arranged at the interior of the rotational force receiving component  214  along the inner circumference direction; the force transmission part  21311  is arranged in a gap among the stress columns  2121 , and the force transmission part  21331  is arranged in a gap among the stress parts  2144 ; the intermediate force transmission component  213  is limited between the photosensitive member hub  212  and the rotational force receiving component  214 ; since the two ends of the intermediate force transmission component  213  are spherical parts, the intermediate force transmission component  213  can make offset at any degree relative to the axis of the photosensitive member hub  212  and the axis of the rotational force receiving component  214 ; said first force transmission part  21311  is engaged with the stress columns  2121  to transmit the force, and said second force transmission part  21331  is engaged with the stress parts  2144  to transmit the force. 
       FIG. 7  to  FIG. 10  respectively describe two states of the driving assembly.  FIG. 7  is a stereo view of the driving assembly at an initial state, and  FIG. 8  is a section view of  FIG. 7 . Before the process cartridge is installed in the electrophotographic image forming device, the driving assembly is at the states shown in  FIG. 7  and  FIG. 8 ; after the process cartridge is installed in place, the driving assembly is at the state (working state) as shown in  FIG. 9  and  FIG. 10 . Before the process cartridge is installed, under the effect of natural stretching of the first elastic element  217 , the sliding piece is kept at the initial state through the first elastic element  217 , namely the axis L 3  of the sliding piece  216  is at an offset state with the axis L 1  of the photosensitive member hub, and the rotational force receiving component  214  is retained in the inner hole  2163 ; meanwhile, the axis of the rotational force receiving component  214  and the axis L 3  of the sliding piece  216  are coaxial, and at this moment, the rotational force receiving component  214  also shifts relative to the axis L 1  of the photosensitive member hub along with the sliding piece  216 , namely the axis L 1  and the axis L 3  do not coincide but are relatively parallel; since the intermediate force transmission component  213  is limited between the photosensitive member hub  212  and the force transmission component  214  and is mutually matched with the photosensitive member hub  212  and the force transmission component  214 , when the rotational force receiving component  214  is at the initial position as shown in  FIG. 8 , the rotational force receiving component  214  drives the intermediate force transmission component  213  to be inclined relative to the axis L 1  of the photosensitive member hub, and meanwhile the intermediate force transmission component  213  is also inclined relative to the axis L 3  of the rotational force receiving component  214 . Right now, the driving assembly is at the initial state, the axis L 2  of the intermediate force transmission component  213  is inclined relative to the axis L 1  of the photosensitive member hub and the axis L 3  of the rotational force receiving component  214 , namely included angles are formed between L 2  and L 1  and between L 2  and L 3 . During the process that the process cartridge is installed in the electrophotographic image forming device, the sliding piece  216  is subjected to the effect of external force F along the negative direction of the installation direction of the process cartridge, and the force F overcomes the elastic force of the first elastic element  217  by driving the sliding piece  216  so that the sliding piece  216  slides inside the sliding rail  2151  along the negative direction of the installation direction of the process cartridge; right now, the rotational force receiving component  214  moves along with the sliding piece  216  and drives the intermediate force transmission component  213  to be gradually straightened (namely the included angles between L 2  and L 1  and between L 2  and L 3  gradually become smaller), and the end, engaged with said rotational force receiving component, of the intermediate force transmission component  213  gets close to said rotational force receiving component; finally, after the process cartridge is installed in place, the external force F overcomes the elastic force of the first elastic element  217  and enables the first elastic element  217  to be compressed, so that the intermediate force transmission component  213 , the rotational force receiving component  214  and the sliding piece  216  are kept at the states as shown in  FIG. 9  and  FIG. 10 , namely the working state of the driving assembly; right now, the axis L 2  of the intermediate force transmission component and the axis L 3  of the rotational force receiving component are coaxial to the axis L 1  of the photosensitive member hub. Meanwhile, during the installation process of the process cartridge from the initial state to the working state, the intermediate force transmission component  213  is straightened from inclination, so that the rotational force receiving component  214  is provided with certain offset in the longitudinal direction of the process cartridge, namely the rotational force receiving component  214  can extend out in the longitudinal direction of the process cartridge. 
       FIG. 11 a    to  FIG. 11 c    illustrate the schematic diagram of the process that the driving assembly is engaged with the rotational force driving head when the process cartridge is installed in the electrophotographic image forming device. As shown in  FIG. 11 a   ,  11  is the rotational force driving head arranged inside the electrophotographic image forming device,  13  is a driving gear for driving the rotational force driving head  11  to rotate,  12  is a right side wall of the electrophotographic image forming device, and  14  is a back side wall of the electrophotographic image forming device, wherein the rotational force driving head  11  and the driving gear  13  are both arranged on the right side wall  12  of the electrophotographic image forming device, and  141  is an inner side face, opposite to the installation direction of the process cartridge, of the back side wall  14 .  FIG. 11 a    illustrates the initial state of the driving assembly before the process cartridge is installed, the intermediate force transmission component  213  is inclined relative to the axis L 1  of the photosensitive member hub and the axis L 3  of the rotational force receiving component  214 , the axis L 3  of the rotational force receiving component  214  makes offset relative to the axis L 1  of the photosensitive member hub, and the first elastic element  217  is at a natural stretching state so that the sliding piece  216  is kept at the initial state, and at this moment the rotational force receiving component  214  is at a retracting state. When the process cartridge is installed along the shown Y direction, the process cartridge gradually gets close to the inner side face  141  of the electrophotographic image forming device; since the rotational force receiving component  214  is at the retracting state all the time, during the installation process of the process cartridge, the rotational force receiving component  214  cannot interfere with the rotational force driving head  11 ; the process cartridge is installed continuously, the end face  2161  of the sliding piece  216  is firstly contacted with the inner side face  141  of the electrophotographic image forming device, the inner side face  141  generates the effect of the force F for the sliding piece  161 , and the action effect of the force F is opposite to the Y direction of the installation direction of the process cartridge; as shown in  FIG. 11 b   , at this moment, the rotational force receiving component  214  is coaxial to the rotational force driving head  11 , but the rotational force receiving component  214  and the rotational force driving head  11  are not engaged with each other and do not interfere with each other, and the rotational force receiving component is at the retracting state; the process cartridge is installed continuously, the force F promotes the sliding piece  216  to slide relative to the photosensitive member  211  along the opposite direction of the Y direction, and the intermediate force transmission component  213  is driven to be gradually straightened through the rotational force receiving component  214 , and the intermediate force transmission component  213  promotes the rotational force receiving component  214  to extend out along the longitudinal direction of the process cartridge, namely in the X direction as shown in  FIG. 11 c   , during the straightening process.  FIG. 11 c    illustrates the state that the process cartridge is installed in place, namely the process cartridge is at the working state, at this moment, the rotational force receiving component  214  is engaged with the rotational force driving head  11 , and the rotational force driving head  11 , the rotational force receiving component  214  and the intermediate force transmission component  213  are all coaxial to the axis L 1  of the photosensitive member hub. When the electrophotographic image forming device is started, the driving gear  13  rotates to drive the rotational force driving head  11  to rotate, and thus the force is transmitted to the photosensitive member so as to enable the photosensitive member to rotate through the rotational force receiving component  214 , the intermediate force transmission component  213  and the photosensitive member hub  212 . 
       FIG. 12 a    to  FIG. 12 c    illustrate the schematic diagram of the process that the engagement between the driving assembly and the rotational force driving head is disengaged during the process that the process cartridge is disassembled from the electrophotographic image forming device. As shown in  FIG. 12 a   , the process cartridge is disassembled from the electrophotographic image forming device along the direction (namely along the shown Y′ direction) opposite to the installation direction (Y direction). During the process that the process cartridge is disassembled gradually, since the force F gradually withdraws, the direction of elastic restoring force generated by the first elastic element  217  is opposite to the disassembly direction of the process cartridge, the elastic restoring force generated by the first elastic element  217  acts on the sliding piece  216 , and thus deflection of the intermediate force transmission component  213  occurs; as shown in  FIG. 12 b   , meanwhile, the restoring force of the elastic element enables the sliding piece  216  to slide inside the sliding rail  2151  along the opposite direction of the disassembly direction of the process cartridge, then the rotational force receiving component  214  is driven to retract along the opposite direction (namely shown X′ direction) of the X direction when the deflection of the intermediate force transmission component occurs, and the engagement between the driving assembly and the rotational force driving head  11  is disengaged, so that the acting force F is gradually weakened until disappears; and as shown in  FIG. 12 c   , the process cartridge is disassembled continuously, and the contact between the process cartridge and the electrophotographic image forming device is completely disengaged. 
     Through the embodiment, the process cartridge does not interfere with the rotational force driving head during the process that the process cartridge is installed in the electrophotographic image forming device; during the installation or disassembly process of the process cartridge and during the process that the contact of the end face of the sliding piece and the inner side face of the electrophotographic image forming device is still kept, the rotational force receiving component  214  does not relatively move in the installation direction of the process cartridge relative to the rotational force driving head  11 ; and only the rotational force receiving component  214  relatively moves in the axial direction relative to the rotational force driving head  11 , and is engaged or disengaged with the rotational force driving head  11 , thus the process cartridge is successfully installed. 
     Embodiment 2 
       FIG. 13  to  FIG. 17  illustrate the second embodiment of the present invention. 
       FIG. 13  illustrates an assembly view of the driving assembly  22  in the second embodiment,  222  is a photosensitive member hub and has the axis L 1 , and a raised non-circular pin  2221  is arranged at the interior of the photosensitive member hub;  223  is an intermediate force transmission component and has the axis L 2 , the axis L 2  is coaxial to the axis L 1 , a non-circular inner hole  2231  is further formed in the intermediate force transmission component, a plurality of protruding parts  2232  are arranged at the end of the intermediate force transmission component, and a boss surface  2233  is arranged on the outer circumference of the intermediate force transmission component; the intermediate force transmission component  223  is arranged inside the photosensitive member hub  222 , and is matched with the pin  2221  inside the photosensitive member hub through the inner hole  2231  to transmit the force; a second elastic element  228  is arranged between the intermediate force transmission component  223  and the photosensitive member hub  222 , one end of the second elastic element  228  abuts against the boss surface  2233  of the intermediate force transmission component  223 , and the other end of the second elastic element  228  abuts against the interior of the photosensitive member hub  222 ; a side plate  225  is provided at one end of the photosensitive member hub  222 , and is fixedly provided at the cartridge frame; a sliding piece  226  is arranged on the side plate  225 , a sliding groove is formed in the side plate  225 , and the assembly condition is the same as that in the first embodiment, an inner hole  2262  is formed in the sliding piece  226 , a first elastic element  227  is arranged between the sliding piece  226  and the side plate  225 , one end of the first elastic element  227  abuts against the sliding piece  226  and the other end of the first elastic element  227  abuts against the side plate  225 , and the first elastic element  227  acts on the sliding piece  226  and enables it to be at the initial state of offset relative to the axis L 1  of the photosensitive member hub; an inclined surface  2263  and a bottom surface  2264  are further arranged on the inner bottom surface of the sliding piece  226 , the inclined surface  2263  can act on the end of the intermediate force transmission component  223  under the effect of the first elastic element  227 , so that axial movement is generated, and the bottom surface  2264  can enable the intermediate force transmission component  223  to be kept at the retracting state;  224  is the rotational force receiving component engaged with the rotational force driving head provided inside the electrophotographic image forming device to transmit the force and has the axis L 3 , a force receiving part is arranged at one end of the rotational force receiving component  224 , a claw  2241  capable of being engaged with the rotational force driving head to transmit the force is arranged on the rotational force receiving component, a boss  2242  is arranged on the outer circumference, the boss  2242  is used for abutting against one end face of the sliding piece  226 , the neck part  2244  is used for connecting the boss  2242  with the force receiving part, a cylinder part  2243  is arranged at the other end of the rotational force receiving component  224 , the cylinder part  2243  is matched with the inner hole  2262  inside the sliding piece  226 , and the cylinder part is provided with a plurality of protruding column parts  2245  (as shown in  FIG. 14 ) in the circumference direction of the cylinder part;  229  is a third elastic element, wherein one end of the third elastic element is fixedly arranged on the sliding piece  226 , and the other end of the third elastic element is locked on the neck part  2244  of the rotational force receiving component  224 . 
       FIG. 14  illustrates a specific structure view of engaged force transmission between the intermediate force transmission component  223  and the rotational force receiving component  224 . As shown in the figure, a plurality of protruding parts  2232  are arranged on the inner circumference of the intermediate force transmission component  223 , and correspondingly, a plurality of protruding column parts  2245  are arranged on the outer circumference of the rotational force receiving component  224 ; when the intermediate force transmission component  223  is engaged with the rotational force receiving component  224 , the protruding parts  2232  and the protruding column parts  2245  are mutually engaged so that mutual force transmission can be realized.  FIG. 15  illustrates a cross section view of an engaged part when intermediate force transmission component  223  is engaged with the rotational force receiving component  224 . 
     The following describes the process that the process cartridge utilizing the driving assembly of the second embodiment is installed in the electrophotographic image forming device and disassembled from the electrophotographic image forming device in detail. 
       FIG. 16 a    to  FIG. 16 c    illustrate the schematic diagram of the process that the driving assembly is engaged with the rotational force driving head when the process cartridge is installed in the electrophotographic image forming device.  FIG. 16 a    illustrates a view of the initial state that said driving assembly  22  is installed on the process cartridge, the intermediate force transmission component  223  is kept at the retracting state under the effect of the sliding piece  226 , and the second elastic element  228  is at a compressed state; and under the effects of the first elastic element  227  and the sliding piece  226 , the rotational force receiving component  224  is kept at the offset state relative to the axis L 1  of the photosensitive member hub. The process cartridge is installed in the electrophotographic image forming device along the Y direction, the end face  2261  of the sliding piece  226  is firstly contacted with the inner side face  141  of the electrophotographic image forming device, and at this moment, as shown in  FIG. 16 b   , the inner side face  141  generates acting force F with a direction opposite to the installation direction of the process cartridge for the sliding piece  226 . The process cartridge is continuously installed, under the effect of the force F, the first elastic element  227  is gradually compressed, the sliding piece  226  overcomes the elastic force of the first elastic element  227  to slide relatively along the direction opposite to the installation direction of the process cartridge, and drives the rotational force receiving component  224  to relatively move along the direction opposite to the installation direction of the process cartridge, and at this moment, the intermediate force transmission component gets close to the inner side face of the electrophotographic image forming device together with the process cartridge along with the installation of the process cartridge, namely the intermediate force transmission component  223  moves relative to the rotational force receiving component  224 , and the axes L 2  and L 3  get close to each other; along with the installation of the process cartridge, during the sliding process of the sliding piece, the contact between the bottom surface  2264  of the sliding piece  226  and the end face of the intermediate force transmission component  223  is gradually disengaged, and the intermediate force transmission component  223  extends out along the longitudinal direction (namely the shown X direction) of the process cartridge under the effect of the elastic restoring force of the second elastic element  228 . When the process cartridge is installed in place, as shown in  FIG. 16 c   ,  FIG. 16 c    illustrates the working state of the driving assembly  22 . The intermediate force transmission component  223  extends out along the shown X direction under the effect of the elastic restoring force of the second elastic element  228 , and is engaged with the rotational force receiving component  224 ; after the intermediate force transmission component  223  and the rotational force receiving component  224  are engaged, the intermediate force transmission component goes on extending out, and promotes the rotational force receiving component  224  to extend out along the X direction all together to be engaged with the rotational force driving head  11  arranged inside the electrophotographic image forming device. At this moment, the photosensitive member hub  222 , the intermediate force transmission component  223 , the rotational force receiving component  224  and the rotational force driving head  11  are all coaxial. After the electrophotographic image forming device is started, the rotational force driving head  11  is driven to rotate by the driving gear  13 , the rotational force driving head is engaged with the claw  2241  of the rotational force receiving component  224  so as to transmit the force to the rotational force receiving component  224 , and rotational force is transmitted to the photosensitive member hub through the engagement between the rotational force receiving component  224  and the intermediate force transmission component  223  and the engagement between the intermediate force transmission component  223  and the photosensitive member hub, and thus the purpose (the photosensitive member hub and the photosensitive member is in close fit and are coaxial) of driving the photosensitive member to rotate by the photosensitive member hub  222  is achieved. 
       FIG. 17 a    to  FIG. 17 c    illustrate the schematic diagram of the process that the engagement between the driving assembly and the rotational force driving head is disengaged during the process that the process cartridge is disassembled from the electrophotographic image forming device. As shown in  FIG. 17 a   , the process cartridge is disassembled along the direction (namely the shown Y′ direction) opposite to the installation process of the process cartridge. Along with the disassembly of the process cartridge, the force F of the inner side face  141  of the electrophotographic image forming device to the sliding piece  226  is gradually weakened and even disappears, the sliding piece  226  slides along the direction opposite to the disassembly direction of the process cartridge under the effect of the elastic restoring force of the first elastic element  227 , the inclined surface  2263  acts on the intermediate force transmission component  223  and enables the intermediate force transmission component  223  to be retracted along the direction of the axis L 1 , and meanwhile the second elastic element  228  is compressed; during the process that intermediate force transmission component  223  is retracted, the engagement between the intermediate force transmission component  223  and the rotational force transmission component  224  is gradually disengaged, and when the bottom surface  2264  of the sliding piece  226  abuts against the end face of the intermediate force transmission component  223 , the intermediate force transmission component can be kept at the retracted state; after the engagement between the intermediate force transmission component  223  and the rotational force receiving component  224  is disengaged, as shown in  FIG. 17 b   , the rotational force transmission component  224  is retracted along the opposite direction (namely the shown X′ direction) of the X direction under the effect of the third elastic element  229 . The process cartridge is continuously disassembled, the contact between the process cartridge and the electrophotographic image forming device is completely disengaged, and as shown in  FIG. 17 c   , the process cartridge is disassembled from the electrophotographic image forming device. 
     Embodiment 3 
       FIG. 18  to  FIG. 21  illustrate the third embodiment of the present invention. 
       FIG. 18  is an assembly view of the driving assembly  23  in the third embodiment.  232  is a photosensitive member hub provided at one end of the photosensitive member in the longitudinal direction, the photosensitive member hub  232  has the axis L 1 , the cavity is formed in the interior of the photosensitive member hub  232 , a bottom  2321  is further arranged, and a non-circular hole  2322  is formed in the bottom;  233  is the intermediate force transmission component, and the intermediate force transmission component  233  has the axis L 2 , is arranged in the photosensitive member hub  232 , and is coaxial to the photosensitive member hub; the intermediate force transmission component  233  comprises three parts which are an intermediate connecting piece  2331 , an end connecting piece  2332  and a pin  2333 , and the pin can axially limit the intermediate force transmission component  233 ;  234  is the rotational force receiving component, a rotational force receiving end is arranged on the rotational force receiving component  234 , a claw  2341  capable of being engaged with the rotational force driving head arranged inside the electrophotographic image forming device to transmit the force is arranged on the rotational force receiving end, a cylinder part  2343  is arranged at the other end of the rotational force receiving component, and the other end of the rotational force receiving component is connected with the intermediate connecting piece  2331 ; a side plate  235  is provided at one end of the photosensitive member hub, a sliding piece  236  is further arranged on the side plate  235 , a sliding groove is formed in the side plate  235 , the setting condition of the sliding piece  236  on the side plate  235  is the same as that in the first embodiment; a first elastic element  237  is arranged between the side plate  235  and the sliding piece  236 , one end of the first elastic element  237  abuts against the side plate  235 , and the other end of the first elastic element  237  abuts against the sliding piece  236 ; the sliding piece  236  is provided with an end face  2361 , an inner hole  2362 , an inner end face  2363 , an inclined surface  2364  and a bottom surface  2365 ; the rotational force receiving component  234  is arranged in the inner hole  2362  of the sliding piece  236  in a penetrated manner, the cylinder part  2343  is matched with the inner hole  2362 , and the rotational force receiving component  234  can slide relative to the inner hole  2362 ; under the effect of the first elastic element  237 , the sliding piece  236  is kept at an offset state relative to the axis L 1  of the photosensitive member hub  232 ; one end of a second elastic element  238  abuts against the bottom  2321  of the photosensitive member hub  232 , and the other end of the second elastic element  238  abuts against the end connecting piece  2332  of the intermediate force transmission component  233 ; when the sliding piece  236  is at the offset state, the bottom surface  2365  of the sliding piece  236  abuts against one part of the intermediate force transmission component  233 , so that the intermediate force transmission component  233  is integrally at the retracted state, and the second elastic element  238  is at a compressed state; and since the rotational force receiving component  234  is connected with the intermediate connecting piece  2331 , the rotational force receiving component  234  is subjected to the traction of the intermediate connecting piece  2331  and is also at the retracted state.  FIG. 18  illustrates the initial state of the driving assembly  23 . 
       FIG. 19  illustrates the specific structure and connection relation between the intermediate force transmission component  233  and the rotational force receiving component  234 . Limit guide rails with limit effect are arranged at the two ends of the intermediate connecting piece  2331  and are respectively arranged to be grooves  23311  and  23312 , and the two grooves are arranged perpendicular to each other and can be arranged to be of T-shaped groove structures; a key  23322  capable of being matched with the groove  23312  is arranged at one end of the end connecting piece  2232 , said key is a T-shaped key correspondingly, a non-circular column  23321  is arranged at the other end of the end connecting piece  2232 , the non-circular column  23321  can be matched with the non-circular hole  2322  inside the photosensitive member hub  232  to transmit the force, and a hole  23323  is formed in the non-circular column  23321  for putting the pin  2333 ; a force receiving part is arranged at one end of the rotational force transmission component  234 , the claw  2341  is arranged at the end of the rotational force transmission component  234 , and a T-shaped key  2342  capable of being matched with the T-shaped groove  23311  is arranged at the other end of the rotational force transmission component  234 . Each of the connection between the intermediate connecting piece  2331  and the end connecting piece  2332  and the connection between the intermediate connecting piece  2331  and the rotational force transmission component  234  has the function of a coupling; the T-shaped keys and the T-shaped grooves can slide relatively; the shape of T has a limiting effect, and can prevent mutual disengaging between components. 
     Assuredly, in the embodiment, the T-shaped grooves can also be respectively arranged on the rotational force receiving component  234  and on the end connecting piece  2332 , and correspondingly the T-shaped keys are arranged on the two ends of the intermediate connecting piece  2331 . 
     The matching between said T-shaped grooves and said T-shaped keys is only a preferable embodiment of the present invention, and can also be other embodiments, and said T shapes can be symmetrical and can also be asymmetrical; said keys and said grooves can be in plane contact and can also be in arc surface contact. While the matching between the keys and the grooves needs relative sliding, certain limit effect exists in the axial direction of each component, and the force can be transmitted in a mutually matched manner. 
     In the embodiment, the non-circular hole and the non-circular column are used for transmitting the force in a mutually matched manner, said non-circular hole is arranged to be a square hole, and said non-circular column is arranged to be a direction column. 
     The following describes the process that the process cartridge utilizing the driving assembly of the third embodiment is installed in the electrophotographic image forming device and disassembled from the electrophotographic image forming device in detail. 
       FIG. 20 a    to  FIG. 20 c    illustrate the schematic diagram of the process that the driving assembly is engaged with the rotational force driving head when the process cartridge is installed in the electrophotographic image forming device.  FIG. 20 a    illustrates a view that the driving assembly  23  is at the initial state, the axis of the rotational force receiving component  234  is L 3 , at this moment, the axis L 3  makes offset relative to the axis L 1  of the photosensitive member hub and the axis L 2  of the intermediate force transmission component, the process cartridge is installed along the shown Y direction, and when the driving assembly is at the initial state, the rotational force receiving component  234  is at the retracted state, so that when the process cartridge is installed, the rotational force receiving component  234  dose not interfere with the rotational force driving head  11  arranged inside the electrophotographic image forming device. As shown in  FIG. 20 a   ,  12  is the right side wall of the electrophotographic image forming device,  14  is the back side wall of the electrophotographic image forming device, the rotational force driving head  11  is arranged on the right side wall  12 , and the driving gear  13  is used for driving the rotational force driving head  11  to rotate. The process cartridge is installed along the Y direction, the end face  2361  of the sliding piece  236  is firstly contacted with the back side face  141  of the electrophotographic image forming device, and the back side wall  14  generates the acting force F to the sliding piece  236 , as shown in  FIG. 20 b   . The process cartridge is continuously installed, under the effect of the acting force F, the sliding piece  236  slides along the direction opposite to the installation direction of the process cartridge, and the first elastic element  237  is gradually compressed; when the sliding piece  236  moves to a certain degree, the contact between the bottom surface  2365  of the sliding piece  236  and the intermediate connecting piece  2331  is disengaged, the intermediate force transmission component  233  can extend out along the direction of the axis L 1  of the photosensitive member hub under the effect of the elastic restoring force of the second elastic element  238 , and meanwhile the rotational force receiving component  234  is pushed to extend out along the longitudinal direction (namely the shown X direction) of the process cartridge; and after the process cartridge is installed in place, the rotational force receiving component  234  extends out to be engaged with the rotational force driving head  11  inside the electrophotographic image forming device, as shown in  FIG. 20 c   , namely the driving assembly is at the working state. After the electrophotographic image forming device is started, the rotational force driving head  11  is driven to rotate by the driving gear  13 , the rotational force receiving component  234  is driven to rotate, and thus the photosensitive member hub  232  is driven to rotate by the intermediate force transmission component, and finally the photosensitive member arranged in the process cartridge is driven to rotate by the photosensitive member hub  232 . At this moment, axes of the photosensitive member  231 , the photosensitive member hub  232 , the rotational force receiving component  234  and the rotational force driving head  11  are basically coaxial. 
       FIG. 21 a    to  FIG. 21 c    illustrate the schematic diagram of the process that the engagement between the driving assembly and the rotational force driving head is disengaged during the process that the process cartridge is disassembled from the electrophotographic image forming device. As shown in  FIG. 21 a   , the process cartridge is disassembled from the electrophotographic image forming device along the direction (namely the shown Y′ direction) opposite to the installation process of the process cartridge. Along with the movement of the process cartridge, the acting force F of the back side wall  14  to the sliding piece  236  is gradually weakened and even disappears, the sliding piece  236  moves along the direction opposite to the disassembly direction of the process cartridge under the effect of the elastic restoring force of the first elastic element  237 , and the rotational force receiving component  234  is driven to slide, so that the rotational force receiving component  234  makes offset relative to the axis of the intermediate force transmission component  233 ; meanwhile, during the sliding process of the sliding piece  236 , the inclined surface  2364  of the sliding piece  236  abuts against the part of the intermediate force transmission component  233 , the intermediate force transmission component  233  is promoted to overcome the retraction of the elastic force of the second elastic element  238 , and meanwhile the intermediate force transmission component  233  drives the rotational force receiving component  234  to be retracted along the shown X′ direction as shown in  FIG. 21 b    during the moving process of the process cartridge. As shown in  FIG. 21 b   , the initial state of the driving assembly  23  is restored, the engagement between the rotational force receiving component  234  and the rotational force driving head  11  of the electrophotographic image forming device is disengaged, and then the process cartridge is successfully disassembled from the electrophotographic image forming device, as shown in  FIG. 21   c.    
     In the scheme of the present invention, if the distance between the axis L 4  of the rotational force driving head  11  inside the electrophotographic image forming device and the inner side face  141  inside the electrophotographic image forming device is h 1 , since the rotational force receiving component  214  ( 224  or  234 ) extends out along the longitudinal direction of the process cartridge to be engaged with said rotational force driving head  11  to transmit the force, in order to guarantee successful engagement between the rotational force receiving component and the rotational force driving head, the distance h 2  between the axis L 3  of said rotational force receiving component and the end face  2161  ( 2261  or  2361 ) of said sliding piece  216  ( 226  or  236 ) is set to be equal to h 1 , as shown in  FIG. 11 a    and  FIG. 11 b   . The distance between the axis L 4  of the rotational force driving head  11  in said electrophotographic image forming device and the inner side face  141  in the electrophotographic image forming device is h 1 , namely the distance between the axis L 4  and the acting point of the external acting force F. 
     Through the embodiment of the present invention, the process cartridge can be successfully installed in the electrophotographic image forming device but does not generate the interference problem that the process cartridge cannot be installed in place with the rotational force driving head of the electrophotographic image forming device. 
       FIG. 22  to  FIG. 25  illustrate the fourth embodiment of the present invention. 
     The driving assembly of the fourth embodiment comprises the same structure in the first embodiment, and the difference is that a buffer piece  99  is additionally arranged in the driving assembly  21 . During the process that the rotational force receiving component  214  is contacted and engaged with the rotational force driving head  11 , the rotational force receiving component  214  has certain pressure buffer capacity. 
     As shown in  FIG. 22  and  FIG. 23 , a recess  214   a  is formed in one end of the rotational force receiving component  214 , and a sliding groove  214   b  is formed in the outer surface of the rotational force receiving component  214 ; a through hole  2133   a  is formed in the surface of the second end spherical part  2133  of the intermediate force transmission component  213 . The connection relation between the rotational force receiving component  214  and the intermediate force transmission component  213  is that the buffer piece  99  is provided in the recess  214   a , the sliding groove  214   b  of the rotational force receiving component  214  and the through hole  2133   a  of the second end spherical part  2133  are penetrated through by a positioning pin  98 . After the rotational force receiving component  214  and the intermediate force transmission component  213  are assembled, the buffer piece  99  is at a slightly compressed state, so that the elastic force of the buffer piece  99  always acts on the rotational force receiving component  214  and the intermediate force transmission component  213 . 
       FIG. 24  and  FIG. 25  illustrate action schematic diagram of the intermediate force transmission component  213  after the rotational force receiving component  214  and the intermediate force transmission component  213  are assembled.  FIG. 24  illustrates a section view in the Y direction after the rotational force receiving component  214  and the intermediate force transmission component  213  are assembled. Because of the width D 1  of the sliding groove  214   b  and the structure of the second end spherical part  2133 , the positioning pin  98  arranged at one end of the intermediate force transmission component  213  is limited in the sliding groove  214   b , and the intermediate force transmission component  213  can realize inclined pendulum motion relative to the rotational force receiving component  214 , namely the axis L 2  of the intermediate force transmission component  213  can incline relative to the axis L 5  of the rotational force receiving component  214 . The larger the width D 1  of the sliding groove  214   b  is, the larger the inclined pendulum range R 5  of the intermediate force transmission component  213  is.  FIG. 25  illustrates the section view in the Z direction (the Z direction is basically vertical to the Y direction) after the rotational force receiving component  214  and the intermediate force transmission component  213  are assembled, the intermediate force transmission component  213  can realize inclined pendulum motion relative to the rotational force receiving component  214 , namely, the intermediate force transmission component  213  can rotate around the positioning pin  98 , and similarly, the axis L 2  of the intermediate force transmission component  213  can incline relative to the axis L 5  of the rotational force receiving component  214 . The inner diameter D 3  of the recess  214   a  of the rotational force receiving component  214  limits the pendulum range of the intermediate force transmission component  213 , and the larger the inner diameter D 3  of the recess  214   a  is, the larger the inclined pendulum range R 6  of the intermediate force transmission component  213  is. 
     Said buffer piece  99  is arranged in the driving assembly  21 , and enables the rotational force receiving component  214  to have certain pressure buffer capacity. During the process that the driving assembly  21  is engaged with the rotational force driving head  11  (refer to  FIG. 11 a    to  FIG. 11 c   ), since the rotational force receiving component  214  extends out, even if certain probability that the top of the claw  2141  structurally interferes with or rigidly collides with the forefront ends of the transmission pins  111  mutually exists, the claw  2141  can obtain the stress of the transmission pins  111  at the same time so that the rotational force receiving component  214  realizes inward retracted movement relative to the intermediate force transmission component  213  to prevent from generating further mutual interference with the transmission pins  111 , and the claw  2141  obtains certain pressure buffer in virtue of the telescopic elastic force of the buffer piece  99  to prevent from being damaged by rigid collision. When the rotational force driving head  11  begins to operate, the transmission pins  111  can prevent from being contacted with the top of the claw  2141  because of the rotation, the stress of the claw  2141  disappears, and the rotational force receiving component  214  is not compressed any longer and obtains the elastic force of the buffer piece  99 , so that the rotational force receiving component  214  extends outwards relative to the intermediate force transmission component  213  to realize the engagement with the rotational force driving head  11  so as to receive the power. 
     Said buffer piece  99  can be a spring or elastic sponge or elastoplastic. 
     Said positioning pin  98  can be replaced by a latching structure. 
       FIG. 26  to  FIG. 27  illustrate the fifth embodiment of the present invention. 
     The driving assembly of the fifth embodiment comprises same elements in the first embodiment or the fourth embodiment, and the difference is the connection manner of the driving assembly and an end gear of a photosensitive drum. Specifically, 
     As shown in  FIG. 26  and  FIG. 27 , a connecting column  219  may comprise an inner ring  219   b  and an outer ring  219   a , and said inner ring  219   b  and said outer ring  219   a  can be connected through a connecting rib. 
     The outer ring  219   a  of the connecting column  219  is provided with outer conical teeth  219   c , namely the outer ring  219   a  of the connecting column  219  is a circular cone inclined surface, and the outer conical teeth  219   c  are arranged on the circular cone inclined surface. The inner ring  212   b  of the photosensitive member hub  212  is provided with inner conical teeth  212   c  matched with the outer conical teeth  219   c , namely the inner ring  212   b  of the photosensitive member hub  212  is an inversely circular cone inclined surface, and the inner conical teeth  212   c  are arranged on the inversely circular cone inclined surface. As said guiding mechanisms, the outer conical teeth  219   c  and the inner conical teeth  212   c  enable the connecting column  219  to be installed in the photosensitive member hub  212 . The connecting column  219  is arranged in the inner ring  212   b  of the photosensitive member hub  212  in a penetrated manner, and the outer conical teeth  219   c  is engaged with the inner conical teeth  212   c  so as to drive the photosensitive member hub  212  to rotate. On the other hand, the outer conical teeth  219   c  and inner conical teeth  212   c  also achieve the guiding effect when the connecting column  219  is arranged in the inner ring of the photosensitive member hub  212  in a penetrated manner. Here, the connecting column  219  and the photosensitive member hub  212  can be fixedly connected in an adhesive bonding or welding manner, or, a first claw  219   d  can be arranged on the inner ring  219   b  of the connecting column  219 , and when the connecting column  219  is arranged in the inner ring  212   b  of the photosensitive member hub  212  in a penetrated manner from the top down, the first claw  219   d  is clamped on the inner ring  212   b  of the photosensitive member hub  212  from the inside to outside from the lower part of the inner ring  212   b  of the photosensitive member hub  212 , so that the connecting column  219  cannot be disengaged from the photosensitive member hub  212  upwards. The outer surface of one end, connected with the intermediate force transmission component  213 , of the connecting column  219  can be arranged to be a cylinder surface, and a through hole for being penetrated through by the connecting pin  97  is formed in the cylinder surface. 
     The connecting column  219  obtained by adopting said technical scheme is clamped on the photosensitive member hub  212  by adopting the first claw  219   d , the outer conical teeth  219   c  are arranged on the outer ring of the connecting column  219 , the inner conical teeth  212   c  are arranged on the inner ring of the photosensitive member hub  212 , the transmission of rotational torque for the connecting column  219  to the photosensitive member hub  212  is realized in the manner that the outer conical teeth  219   c  are engaged with the inner conical teeth  212   c , and firm connection among the intermediate force transmission component  213 , the connecting column  219  and the photosensitive member hub  212  is further realized, so that the intermediate force transmission component  213  and the connecting column  219  are unlikely to be disengaged from the photosensitive member hub  212 , the failure rate of the driving assembly is reduced, and the stability is improved. 
     On the basis of the technical scheme, the diameters of openings at the two ends of the through hole of the first end spherical part  2131  on the intermediate force transmission component  213  can be greater than that of the through hole;  FIG. 27  illustrates the section view of the intermediate force transmission component  213 , and the two ends of the through holes are fan-shaped, so that the angle range of relative rotation between the intermediate force transmission component  213  and the connecting column  219  is greater, and the rotation is more flexible. Similarly, the diameters of openings at the two ends of the through hole of the second end spherical part  2133  on the intermediate force transmission component  213  can be greater than that of the through hole, and the two ends of the through hole are approximately fan-shaped, so that the angle range of relative rotation between the intermediate force transmission component  213  and the rotational force receiving component  214  is greater, and the rotation is more flexible. 
     In the following Embodiment Six to Embodiment Eleven: 
     The axial direction of the process cartridge is substantially coaxial with or parallel to the axis of rotation of a developing member. 
     The installation direction of the process cartridge in the electrophotographic image forming device is substantially perpendicular to the axial direction. 
     The detaching (removing) direction of the process cartridge in the electrophotographic image forming device is opposite to the installation direction of the process cartridge. 
     (Process Cartridge) 
     As shown in  FIG. 28 , which is a schematic structural diagram of a process cartridge aC in an electrophotographic image forming device (not shown), the process cartridge aC includes a housing (a first housing aa and a second housing ab) and side walls ab 1  and ab 2  at two ends of the housing, the first housing aa is provide in its interior with a charging member a 20 , a cleaning member a 40 , a photosensitive member a 10  etc, and the second housing ab is provide in its interior with a developing member a 30 , a toner controlling member a 50 , developing agent etc. 
     (Rotational Force Driving Assembly) 
     Embodiment Six 
     As shown in  FIG. 29 , a rotational force driving assembly a 200  is arranged at one end of the axial direction of the process cartridge aC and participates in developing processing of the electrophotographic image forming device through that the rotational force driving assembly a 200  of the process cartridge engages with a driving head a 900  in the electrophotographic image forming device and then a rotational driving force is transmitted into the process cartridge aC and then drives the developing member in the process cartridge aC to operate. 
     As shown from  FIG. 29  to  FIG. 35 b   , the rotational force driving assembly a 200  is arranged at one end of the axial direction of the process cartridge aC, and the rotational force driving assembly a 200  includes a baffle plate a 290 , a coupling component a 210 , a pressing component a 220 , a sliding piece a 230 , an elastic member a 250 , a transmitting component a 270  and a force transmission portion a 260 . The coupling component a 210  is provided with connecting part a 216 , a projection a 211  provided at one end of the connecting part a 216  and configured to abut and engage with a driving pin a 910  of the driving head a 900 , and a sliding groove a 215  provided at the other end of the connecting part a 216 ; the middle portion of the connecting part a 216  is also provided with a latching slot a 218  and a limiting surface a 212 . The pressing component a 220  is of a hollow frame structure, a sliding surface a 224  is provided on the outer surface of the pressing component a 220 ; a pressed part a 221  is provided on the upper end of the pressing component a 220 , and the pressed part a 221  has some curved surfaces or bevels; a pressing surface a 222  is provided at a bottom surface of a pair of long sliding blocks a 223  of the pressing component a 220  which are protruded inwardly; and a limiting protrusion a 225  is provided on the lower end of the pressing component a 220 . The sliding piece a 230  is of a trapezoid structure with the narrow top and wide bottom, an upper surface of the sliding piece a 230  is a positioning surface a 235  which abuts and engages with the limiting surface a 212  of the coupling component a 210 ; a lateral surface of the sliding piece a 230  is provided with an inclined bevel sliding surface a 231  and the two lateral surfaces are provided with a sliding groove a 232 ; and a through hole a 236  is further provided in the sliding piece a 230 . The middle portion of the baffle plate a 290  is provided with an hole a 299 ; an inwardly inclined bevel a 291  and a vertical sliding surface a 294  are provided surround the hole a 299 , and the bevel a 291  is arranged inclined so that the hole a 299  is of a structure with narrow outer and wide inner (in  FIG. 34 b   , aW 2  is larger than aW 1 ) on the baffle plate a 290 ; and the limiting surface a 295  is provided on the bottom end of the sliding surface a 294  and cooperates with the limiting protrusion a 225  of the pressing component a 220  for limiting. The transmitting component a 270  is of a cylindrical structure and is provided with a cavity a 272  in its interior; the surface of the transmitting component a 270  is provided with a gear surface a 271  for transmitting a driving force; the bottom portion of the cavity a 272  has a bottom surface a 275 ; a (a pair of) limiting sliding groove(s) a 273  is provided in the cavity a 272 ; and the limiting sliding groove a 273  is formed by two protrusions and is provided with a sliding groove in the middle portion. The connecting part a 260  is of a cranked structure with the middle portion protruded. 
     As shown in  FIG. 30  and  FIG. 36 , the assembling relationship of the above parts is: the pressing component a 220  fits with the sliding groove a 232  at two sides of the surface of the sliding piece a 230  in a sliding manner through the built-in long sliding block a 223 ; the coupling component a 210  passes through the through hole a 236  of the sliding piece a 230  and the pressing component a 220  via the connecting part a 216 , and the limiting surface a 212  of the coupling component a 210  abuts the positioning surface a 235  of the sliding piece a 230 ; a latching buckle a 219  is embedded into the latching slot a 218  of the coupling component a 210  extended from the sliding piece a 230  so that the coupling component a 210  is axially fixed on the sliding piece a 230 ; the force transmission part a 260  passes through a sliding groove a 215  at one end of the connecting part a 216 , and the middle protruded portion of the connecting part a 260  is located in the sliding groove a 215 ; the elastic member a 250  is placed in the cavity a 272  of the transmitting component a 270 , two ends of the connecting part a 260  are placed in the built-in limiting sliding groove a 273  in the transmitting component a 270 , one end of the elastic member a 250  abuts the bottom surface a 275  of the cavity a 272 , and the other end abuts the two ends of the connecting part a 260 . After the above parts fit with each other, they can be installed as a whole into one end of the process cartridge aC, the transmitting component a 270  can directly cooperate with the photosensitive member a 10  or/and the developing member a 30  so as to transmit a driving force; the baffle plate a 290  covers the sliding piece a 230 ; the coupling component a 210  extends outward from the hole a 299  of the baffle plate a 290 ; the inclined sliding surface a 231  of the sliding piece a 230  abuts and fits with the bevel a 291  provided in the baffle plate a 290 ; the sliding surface a 224  of the pressing component a 220  fits with the sliding surface a 294  of the baffle plate a 290  in a vertical sliding manner; then the baffle plate a 290  is fixed at one end of the process cartridge aC through screwing, gluing, welding and so on, thereby preventing the rotational force driving assembly from being separated from the process cartridge aC. 
     As described above, one end of the elastic member a 250  abuts the connecting part a 260  and two ends of the connecting part a 260  are located in the limiting sliding groove a 273  so that the connecting part a 260  can elastically move along the limiting sliding groove a 273 , and the coupling component a 210  which is connected with the connecting part a 260  can also elastically move back and forth with respect to the transmitting component a 270 ; similarly, the pressing component a 220  and the sliding piece a 230  can also move together with the stretching and retracting movement of the coupling component a 210  on account of the connection between the sliding piece a 230  and the coupling component a 210  as well as the connection between the pressing component a 220  and the sliding piece a 230 . Through that the baffle plate a 290  covers on the sliding piece a 230 , since the elastic force applied by the elastic member a 250  makes the inclined sliding surface a 231  of the sliding piece a 230  abut the bevel a 291 , and makes the limiting protrusion a 225  of the pressing component a 220  abut the limiting surface a 295  to limit the stretching length of the coupling component a 210  from the rotational force driving assembly a 200 , the coupling component a 210  subjected by the elastic force can stretch and retract axially along direction aY (direction aY is substantially coaxial or overlapped with the axial direction of the developing member a 30  or the photosensitive member a 10 , and is substantially perpendicular to direction aX). 
     As shown from  FIG. 37 a    to  FIG. 38 c   , the coupling component a 210  in the rotational force driving assembly a 200  can achieve the following movements (in order to more conveniently understand the movement of the coupling component a 210  in the transmitting component a 270 , some parts of the rotational force driving assembly are not shown): (1) the coupling component a 210  can stretch and retract axially along direction aY through the elastic force of the elastic member a 250 ; (2) as shown in  FIG. 37 b   , viewing from the length direction of the connecting part a 260 , since the coupling component a 210  is assembled and fits with the connecting part a 260  through the sliding groove a 215 , the coupling component a 210  can slide left and right along the length of the connecting part a 260 , that is, the coupling component a 210  can achieve parallel shift of a certain distance with respect to the transmitting component a 270 ; (3) as shown from  FIG. 38 a    to  FIG. 38 c   , viewing from the end surface of the connecting part a 260 , since the connecting part a 260  is of a cranked structure with a protrusion in the middle, and the two ends of the connecting part a 260  are placed in the limiting sliding groove a 273 , the coupling component a 210  can achieve left and right deflection movement via the cranked structure with the protrusion in the middle of the connecting part a 260  by means of the connection and fit with the connecting part a 260  through the sliding groove a 215 , that is, the coupling component a 210  can achieve parallel shift of a certain extent with respect to the transmitting component a 270 . 
     As shown in  FIG. 39  and  FIG. 40 , which are schematic structural diagrams of the two lateral walls (aF 10 , aF 20 ) in the electrophotographic image forming device (not shown), the two lateral walls (aF 10 , aF 20 ) are provided with guide rails (aF 11 , aF 21 ), and the guide rails (aF 11 , aF 21 ) are used for guiding the process cartridge aC being installed into the electrophotographic image forming device; the guide rails (aF 11 , aF 21 ) are of a lath shaped structure; the guide rail aF 11  of one lateral wall aF 10  has a front end aF 11   a  and a back end aF 11   b , and the driving head a 900  of the electrophotographic image forming device is arranged adjacent to the back end aF 11   b.    
     When installing the process cartridge aC into the electrophotographic image forming device through the two lateral walls (aF 10 , aF 20 ) in the electrophotographic image forming device along direction aX (direction aX is substantially perpendicular to the axial direction of the developing member), the rotational force driving assembly a 200  at one end of the process cartridge aC also enters into the electrophotographic image forming device along guide rail aF 11 . As shown from  FIG. 41 a    to  FIG. 41 c   , when the pressed portion a 221  of the rotational force driving assembly a 200  is not pressed, the coupling component a 210  is in an stretched state along direction aY due to the elastic force of the elastic member a 250 , and the pressed portion a 221  of the pressing component a 220  protrudes from the outer surface of the baffle plate a 290 , where the outer surface is the outer side surface of the baffle plate a 290 , the protruding direction of the pressed portion a 221  is the same with the stretching direction of the coupling component a 210 , refer to the direction of the arrow in direction aY in  FIG. 41 b   . When the pressed portion a 221  of the rotational force driving assembly a 200  abuts the front end aF 11   a  of the guide rail aF 11  and is pressed, as shown in  FIG. 42 a    and  FIG. 42 b   , the whole pressing component a 220  moves downward along direction aY due to the pressed portion a 221  being pressed, the sliding surface a 224  of the pressing component a 220  is limited to move vertically downward in the sliding surface a 294  of the baffle plate a 290 ; as the pressing component a 220  moving downward, the pressing surface a 222  of the pressing component a 220  presses the sliding groove a 232  of the sliding piece a 230  at the same time so that the sliding piece a 230  moves vertically downward; as the sliding piece a 230  moving downward, the sliding piece a 230  presses the latching buckle a 219  of the coupling component a 210  at the same time so that the coupling component a 210  moves downward at the same time. In this way, through the cooperation of the above parts, when the pressed portion a 221  of the rotational force driving assembly a 200  is pressed to move downward, the coupling component a 210  of the rotational force driving assembly a 200  moves vertically downward at the same time, that is, the coupling component a 210  can achieve retraction with respect to the surface of the baffle plate a 290 . As shown in  FIG. 42 a   , when the pressed portion a 221  is pressed to move downward, there exists a space aH 1  between the topmost end of the coupling component a 210  and the axial bottommost end of the driving head a 900  in the electrophotographic image forming device; as the further installation of the process cartridge aC along the guide rails (aF 11 , aF 21 ) in the electrophotographic image forming device towards direction aX, the pressed portion a 221  of the rotational force driving assembly a 200  keeps the pressed state due to the limitation of the length of the guide rail. As shown in  FIG. 43 , when the process cartridge moves to the back end aF 11   b , the coupling component a 210  which keeps the retracting state also approaches the driving head a 900  in the electrophotographic image forming device as the process cartridge aC moving. When the process cartridge aC is installed in place (i.e. the operating position of the process cartridge in the electrophotographic image forming device), the rotational axis of the coupling component a 210  of the process cartridge aC is substantially coaxial with the rotational axis of the driving head a 900 ; the pressed portion a 221  of the rotational force driving assembly a 200  moves accordingly to the back of the back end aF 11   b  of the guide rail aF 11  and is no longer pressed, as shown in  FIG. 44 a    and  FIG. 44 b   ; at this time the elastic member a 250  of the rotational force driving assembly a 200  releases the elastic force to the connecting part a 260  so as to push the connecting part a 260  to move; the connecting part a 260  then pushes the coupling component a 210  to extend outward and engage with the driving head a 900 ; as the coupling component a 210  stretching outward, the sliding piece a 230  and the pressing component a 220  which fit with the coupling component a 210  also slide outward to the position before being pressed. 
     At last, the coupling component a 210  transmits the rotational driving force to the connecting part a 260 , the connecting part a 260  makes the transmitting component a 270  rotate through the two ends of the connecting part a 260  abutting on the driving face  273   a , and the transmitting component a 270  finally transmits the driving force into the process cartridge aC. 
     The process of removing the process cartridge aC from the electrophotographic image forming device can be referred to the process of installing the process cartridge aC into the electrophotographic image forming device, it is only needed to perform inverse operation. When removing the process cartridge aC from the electrophotographic image forming device along the guide rails (aF 11 , aF 21 ) in the opposite direction of the installation direction, the pressed portion a 221  of the rotational force driving assembly a 200  abuts the back end aF 11   b  of the guide rail aF 11  as the process cartridge aC moving towards the removing direction; the back end aF 11   b  presses the pressed portion a 221  so that the pressed portion a 221  moves downward along direction aY and finally drives the coupling component a 210  to retract; then the coupling component a 210  can disengage with the driving head a 900 , that is, it will not be difficult to remove the process cartridge aC from the electrophotographic image forming device due to the structure interference caused by the tight engagement of the coupling component a 210  and the driving head a 900 . When the process cartridge aC is removed completely from the electrophotographic image forming device, the front end aF 11   a  of the guide rail aF 11  will not press the pressed portion a 221  of the rotational force driving assembly a 200  any more, thus the pressed portion a 221  and the coupling component a 210  stretch outward due to the elastic force of the elastic member a 250 , and return to the initial position before being pressed. 
     In addition, in order to facilitate removing the process cartridge aC from the electrophotographic image forming device more convenient and easier, as shown in  FIG. 45 , when removing the process cartridge aC from the electrophotographic image forming device along direction aX (removing direction) after completing developing process, the driving head a 900  is still in tight engagement with the coupling component a 210  so that it is difficult for the coupling component a 210  to move towards the removing direction, but the transmitting component a 270  can move with respect to the coupling component a 210 . Therefore, when the coupling component a 210  is relatively fixed in the removing direction due to tight engagement, the movement of the transmitting component a 270  along the removing direction can make the built-in bevel a 291  generate a pressing force aF 2  and press the inclined sliding surface a 231  of the sliding piece a 230  so that the sliding piece a 230  retracts, and the coupling component a 210  which fixedly fits with the sliding piece a 230  moves downward as the sliding piece a 230  retracting. Besides, when the sliding piece a 230  retracts, it also presses the pressing component a 220  so that the pressing component a 220  retracts; the sliding surface a 294  of the baffle plate a 290  makes the sliding surface a 224  of the pressing component a 220  slide vertically inward; the coupling component a 210  keeps erect while retracting by means of the cooperation of the pressing component a 220  and the sliding piece a 230  as well as the fixed cooperation of the sliding piece a 230  and the coupling component a 210  make; the rotational axis of the coupling component a 210  during moving is always substantially coaxial with or parallel to the rotational axis of the transmitting component a 270 . In this way, through the bevel a 291  of the baffle plate a 290  pressing on the inclined sliding surface a 231  of the sliding piece a 230 , finally the coupling component a 210  retracts with respect to the surface of the baffle plate a 290  and disengages with the driving head a 900 . 
     As described above, when removing the process cartridge aC out of the electrophotographic image forming device, through the back end aF 11   b  of the guide rail aF 11  abutting the pressed portion a 221  of the rotational force driving assembly a 200  such that the coupling component a 210  axially retracts, and the bevel a 291  of the baffle plate a 290  abutting on the inclined sliding surface a 231  of the sliding piece a 230  such that the coupling component a 210  axially retracts, the cooperation actions of the above two makes the coupling component a 210  easy to be axially disengaged after the tight engagement with the driving head a 900 , thereby avoid the structure interference when the coupling component a 210  disengages with the driving head a 900 . 
     Embodiment Seven 
     In Embodiment Seven, the coupling component a 210 , the baffle plate a 290 , the pressing component a 220 , the elastic member a 250 , the sliding piece a 230  etc of the rotational force driving assembly a 200  are referred to the relevant parts of Embodiment Six, which will not be repeated here, the main difference lies in the transmitting component a 289  and the connecting part a 217  of the rotational force driving assembly a 200  of Embodiment Seven. 
     As shown in  FIG. 46  and  FIG. 47 c   , the connecting part a 217  is of a straight-bar structure; the transmitting component a 280  is of a cylindrical structure and is provided with a cavity a 282  in its interior; the surface of the transmitting component a 280  is provided with a gear surface a 281 ; the cavity a 282  is provided with a bottom surface a 285  at the bottom; a (a pair of) stressed cylinder(s) a 283  is provided in the cavity a 282 , and the stressed cylinder a 283  is a protrusion and a concave surface a 283   a  is provided on the protrusion; a guide block a 284  is further provided in the cavity a 282 , with respect to the stressed cylinder a 283 , the guide block a 284  is closer to the outer end (opening of the cavity) of the transmitting component a 280 ; a guiding surface a 284   a  is provided inward in the guide block a 284 , where the guiding surface a 284   a  is a bevel or a curved surface; viewing from the end surface of the transmitting component a 280 , as shown in  FIG. 47 b   , the stressed cylinder a 283  and the guide block a 284  do not overlap with each other, and viewing from the side surface of the transmitting component a 280 , as shown in  FIG. 47 c   , the top end of the stressed cylinder a 283  is higher than the bottom end (shown as aH 2 ) of the guide block a 284 . 
     In the rotational force driving assembly a 200  of Embodiment Seven, the elastic force of the elastic member a 250  pushes outward the connecting part a 217  in the sliding groove a 215  of the coupling component a 210  so that the connecting part a 217  is higher than the stressed cylinder a 283  of the transmitting component a 280  but no higher than the guide block a 284 . In addition, since the end portion of the connecting part a 217  fitting with the coupling component a 210  is not limited in the transmitting component a 280 , when the rotation axis of the coupling component a 210  and the rotation axis of the transmitting component a 280  is substantially coaxial, if the coupling component a 210  rotates counter-clockwise along direction aR, the connecting part a 217  rotates as the coupling component a 210  rotating. 
     As shown from  FIG. 48  to  FIG. 52 , the coupling component a 210  of the rotational force driving assembly a 200  can achieve the following movements (in order to more conveniently understand the movements of the coupling component a 210  in the transmitting component a 280 , some parts of the rotational force driving assembly are not shown): (1) when the rotational force of the coupling component a 210  is less than the elastic force of the elastic member a 250 , as shown in  FIG. 49 , as the coupling component a 210  rotating, the connecting part a 217  is pushed by the elastic force of the elastic member a 250  so that it is higher than the stressed cylinder a 283  but no higher than the guide block a 284 , and the connecting part a 217  does not abut the stressed cylinder a 283 . Since the connecting part a 217  is not higher than the guide block a 284 , when the connecting part a 217  approaches the guide block a 284  as the coupling component a 210  rotating and then abuts the guiding surface a 284   a  of the guide block a 284 , the rotating connecting part a 217  is guided by the guiding surface a 284   a  and moves downward along the sliding groove a 215  and meanwhile presses the elastic member a 250 ; when the connecting part a 217  keeps rotating and goes beyond the guide block a 284 , the connecting part a 217  is no longer pressed, and the elastic member a 250  releases the elastic force to push outward the connecting part a 217  back to the position before being pressed which is higher than the stressed cylinder a 283 . Thus, when the rotational force of the coupling component a 210  is less than the elastic force of the elastic member a 250 , the connecting part a 217  can rotate along with the coupling component a 210  and does not abut with the stressed cylinder a 283 , thus the coupling component a 210  can rotate with respect to the transmitting component a 280  but does not transmit a driving force to the transmitting component a 280 . (2) When the rotational force of the coupling component a 210  is larger than the elastic force of the elastic member a 250 , as shown in  FIG. 50 , the connecting part a 217  rotates along with the coupling component a 210 , approaches the guide block a 284  and moves downward along the sliding groove a 215  through guidance of the guiding surface a 284   a . Since the rotational force of the coupling component a 210  is larger than the elastic force of the elastic member a 250  and the connecting part a 217  which is moving downward is lower than the stressed cylinder a 283  of the transmitting component a 280 , the connecting part a 217  directly abuts against the stressed cylinder a 283  under the action of the rotational force of the coupling component a 210 . Through abutting against the concave surface a 283   a  of the stressed cylinder a 283 , even suffering the elastic force of the elastic member a 250 , the connecting part a 217  will not be pushed away from the stressed cylinder a 283 . In this way, the coupling component a 210  transmits the rotational driving force to the transmitting component a 280  through the connecting part a 217  abutting the stressed cylinder a 283 ; at last the transmitting component a 280  drives the process cartridge aC to participate the developing operation of the electrophotographic image forming device. When the rotational force of the coupling component a 210  is less than the elastic force of the elastic member a 250  or disappears, the elastic member a 250  can push the connecting part a 217  back to the position before being stressed which is higher than the stressed cylinder a 283 . 
     Through the structure configuration of Embodiment Seven, when the process cartridge does not participate the developing operation of the electrophotographic image forming device, the coupling component a 210  of the rotational force driving assembly a 200  of the process cartridge aC can rotate with respect to the transmitting component a 280  but does not transmit the driving force to the transmitting component a 280 ; when the process cartridge aC participates the developing operation of the electrophotographic image forming device, the coupling component a 210  of the rotational force driving assembly a 200  of the process cartridge aC transmits the driving force to the transmitting component a 280 . 
     In addition, as shown in  FIG. 47 c   , the top end of the stressed cylinder a 283  is provided with a guiding edge a 283   b , which is preferably a bevel edge or a curved edge. The guiding edge a 283   b  can abut the connecting part a 217  which connects with the coupling component a 210  so that the connecting part a 217  is easy to be stressed to slide downward, when the coupling component a 210  is stressed to retract. The two ends of the connecting part a 217  can avoid from generating structure interference with the top end of the stressed cylinder a 283  when moving downward which will affect the stretching function of the coupling component a 210 . 
     Embodiment Eight 
     As shown in  FIG. 53 , in Embodiment Eight, the baffle plate a 290 , the pressing component a 220 , the elastic member a 250 , the sliding piece a 230  etc of the rotational force driving assembly a 200  are referred to the relevant parts of Embodiment Six, which will not be repeated here, the main difference lies in the coupling component a 210 , the connecting part a 360  and the transmitting component a 380  of the rotational force driving assembly a 200  of Embodiment Eight. 
     One end of the coupling component a 210  is provided with a projection a 211  which abuts and engages with the driving pin a 910  of the driving head a 900 , and the other end is provided with a convex key a 214 ; the transmitting component a 380  is provided with a bottom surface a 385  and a convex key a 386  in its interior; one end of the connecting part a 360  is provided with a first groove a 364 , and the other end is provided with a second groove a 366 ; viewing from the end face of the connecting part a 360 , the first groove a 364  and the second groove a 366  are arranged mutually crossed. Preferably, the convex keys a 214  and a 386  are oval protrusions; the first groove a 364  and the second groove a 366  are oval grooves. 
     As shown in  FIG. 56 , in the rotational force driving assembly a 200  of Embodiment Eight, the convex key a 214  of the coupling component a 210  is arranged in the first groove a 364  of the connecting part a 360 ; the convex key a 386  in the transmitting component a 380  is arranged in the second groove a 366  of the connecting part a 360 ; after the above convex keys a 214  and a 386  fit with the grooves a 364  and a 366 , the connecting part a 360  is located between the transmitting component a 380  and the coupling component a 210 . 
     As shown in  FIG. 56  and  FIG. 57 a   , which show that the convex key a 214  of the coupling component a 210  is in the first groove a 364  of the connecting part a 360 , at least a portion of the convex key a 214  is arranged in the first groove a 364 ; viewing from the end face of the connecting part a 360 , as shown in  FIG. 57 a   , the maximum length aW 3  of the convex key a 214  is larger than the minimum width aW 4  of the first groove a 364 . Similarly, at least a portion of the convex key a 386  is arranged in the second groove a 366 , and the maximum length of the convex key a 386  is larger than the minimum width of the second groove a 366 . 
     As shown in  FIG. 56  and  FIG. 57 b   , since the convex key a 214  is located in the first groove a 364 , the coupling component a 210  can move with respect to the connecting part a 360  in the direction perpendicular to the rotational axis of the transmitting component a 380 ; similarly, since the second groove a 366  surrounds the convex key a 386 , the connecting part a 360  can move with respect to the transmitting component a 380  in the direction perpendicular to the rotational axis of the transmitting component a 380 . 
     As shown in  FIG. 57 c   , when the coupling component a 210  rotates after receiving the rotational force, the portion of the convex key a 214  with the maximum length which rotates accordingly abuts the portion of the first groove a 364  with the minimum width and drives the connecting part a 360  to rotate; the second groove a 366  of the other end of the connecting part a 360  rotates accordingly and its portion with the minimum width abuts the convex key a 386  of the transmitting component a 380  and finally drives the transmitting component a 380  to rotate. 
     In the above Embodiment Eight, the convex keys of the coupling component a 210  and the transmitting component a 380  can also be grooves, the first and second grooves of the connecting part a 360  can also be convex keys. In addition, when the convex keys a 214  and a 386  are in the grooves a 364  and a 366 , the coupling component a 210  or/and the transmitting component a 380  need to keep a certain space with the connecting part a 360 , so as to avoid structure interference when the coupling component a 210  stretches and retracts. 
     Embodiment Nine 
     As shown in  FIG. 58 , in Embodiment Nine, the baffle plate a 290 , the pressing component a 220 , the sliding piece a 230 , the coupling component a 210  etc of the rotational force driving assembly a 200  can be referred to the relevant parts of Embodiment Six, which will not be repeated here, the main difference lies in the transmitting component a 280 , an anti-detaching ring a 240 , a connection portion a 320 , a plurality of connecting parts a 330 , a first return spring a 400  and a second return spring a 410 , where the first return spring a 400  is a return spring of the connecting part, and the second return spring a 410  is a return spring of the coupling component. 
     As shown from  FIG. 59 a    to  FIG. 62 b   , one end of the coupling component a 210  is provided with a projection a 211  for abutting and engaging with the driving pin a 910  of the driving head a 900 , the other end is provided with a groove a 217  with non-circle cross section; preferably, in the present embodiment the cross section of the groove a 217  is of rectangular shape. The base a 320   a  of the connection portion a 320  is provided with a protrusion a 320   d  corresponding to the groove a 217  of one end of the coupling component a 210 , the other end of the base a 320   a  is provided with a groove a 320   e . A plurality of connecting parts a 330  are uniformly arranged on the periphery of the base a 320   a  of the connection portion a 320 ; the connecting parts a 330  and the groove a 320   c  of the base a 320   a  are connected with each other via a hinge, the connecting parts a 330  can swing up and down about the hinge joint. After the connecting part a 330  is installed on the base a 320   a , all the connecting parts a 330  always incline towards the axial direction of the coupling component a 210  due to the limiting of the groove a 320   c . A (a plurality of) limiting sliding groove(s) a 282   a  is provided in the cavity a 282  of the transmitting component a 280 , the limiting sliding groove a 282   a  is formed by two protrusions. The anti-detaching ring a 240  is provided below the pressing component a 220 , the diameter of the inner circle of the anti-detaching ring a 240  is less than the diameter of a circle where an end point of the free end of the connecting part a 330  is located, and the diameter of the outer circle is less than the diameter of the cavity a 282  of the transmitting component a 280 . 
     As shown in  FIG. 62 a    and  FIG. 62 b   , one end of the connecting part a 330  is hinged on the base a 320   a , the other end is located in the limiting sliding groove a 282   a . The second return spring a 410  is provided between the connection portion a 320  and the transmitting component a 280 ; one end of the second return spring a 410  abuts on the bottom surface a 285  of the cavity a 282 , the other end abuts in the groove a 320   e  at the bottom of the base a 320   a . The first return spring a 400  is provided between the anti-detaching ring a 240  and the connecting part a 330 ; one end of the first return spring a 400  abuts on the connecting part a 330 , the other end abuts on the bottom surface of the anti-detaching ring; under the action of the first return spring a 400 , the connecting part a 330  is pressed so that the top surface of the anti-detaching ring a 240  contacts the bottom surface of the pressing component a 220 . 
     In the rotational force driving assembly a 200  of Embodiment Nine, under the action of the first return spring a 400 , one end of the connecting part a 330  is located in the limiting sliding groove a 282   a , and can move along direction aY in the limiting sliding groove a 282   a . Since the limiting sliding groove a 282   a  will limit the connecting part a 330  to move along the direction perpendicular to the axial direction of the transmitting component a 280 , the axis of rotation of the coupling component a 210  is substantially coaxial with the axis of rotation of the transmitting component a 280 , when the coupling component a 210  rotates, the connecting part a 330  rotates accordingly, and drives the transmitting component a 280  to rotate. 
     The coupling component a 210  in the rotational force driving assembly a 200  can achieve the following movements (in order to more conveniently understand the movements of the coupling component a 210  in the transmitting component a 280 , some parts of the rotational force driving assembly a 200  such as the pressing component a 220 , the sliding piece a 230  are not shown): (1) as shown in  FIG. 62 a   , when the coupling component a 210  is subjected to an external force along direction aY, the coupling component a 210  will press the connection portion a 320  and the second return spring a 410 , and the second return spring a 410  will retract along direction aY, so that the coupling component a 210  and the connection portion a 320  move along direction aY for a certain distance, accordingly, the connecting part a 330  will slide in the limiting sliding groove a 282   a  along direction aY; when the external force disappears, the second return spring a 410  pushes the connection portion a 320  and the coupling component a 210  to move inversely along direction aY to the topmost position, accordingly, the connecting part a 330  will slide in the limiting sliding groove a 282   a  along direction aY; (2) as shown in  FIG. 62 b   , when the coupling component a 210  is subjected to an external force in a direction perpendicular to the direction aY, the coupling component a 210  will drive the connection portion a 320  and the connecting part a 330  to move along direction aX; in order to increase the moving distance of the coupling component a 210  along direction aX as much as possible, the connecting part a 330  is configured as a structure which can rotate about the base a 320   a , the connecting part a 330  and the base a 320   a  are connected with each other via a hinge, and a plurality of connecting parts a 330  are uniformly distributed on the periphery of the base a 320   a . Preferably, in the present embodiment, the connecting part a 330  is connected to the base a 320   a  via a connection wire a 340 , as shown in  FIG. 60 a   , the connection wire a 340  goes through a circular hole a 330   b   1  of the connecting part a 330  and a circular hole a 320   b  of the base a 320   a  in turn, and hinges the connecting part a 330  and the base a 320   a  together; preferably, the connection wire a 340  in the present embodiment is of soft material. 
     Alternatively, as shown in  FIG. 60 b   , the connection portion a 320  is divided by the diameter portion of the circular hole a 320   b  as a first connection portion a 321  and a second connection portion a 322 , where the first connection portion a 321  includes the protrusion a 320   d  of non-circular cross section and the upper half of the base a 320   a , and the second connection portion a 322  includes the lower half of the base a 320   a . The connecting parts a 330  are connected in series via the connection wire a 340 ; then the connection wire a 340  is installed in the half-circle groove a 320   x ; the connecting parts a 330  are installed in the corresponding grooves a 320   c  respectively; at last, the first connection portion a 321  and the second connection a 322  are installed together. In the present embodiment, the first connection portion a 321  and the second connection portion a 322  can be installed together via latching, welding or gluing etc. 
     When the connecting part a 330  moves together with the coupling component a 210  and contacts with the inner wall of the cavity a 282  of the transmitting component a 280 , the inner wall of the cavity a 282  applies a force on the connecting part a 330 ; at this time the connecting part a 330  rotates inversely along direction aY for avoiding, so that the coupling component a 210  keeps on moving along direction aX; when the external force disappears, the coupling component a 210  moves along the direction opposite to the previous moving direction, and under the action of the first return spring a 400 , the connecting part a 330  swings along direction aY, and finally returns to the initial position. 
     Embodiment Ten 
     As shown in  FIG. 63 , in Embodiment Ten, the baffle plate a 290 , the elastic member a 250  etc of the rotational force driving assembly a 200  are referred to the relevant parts of Embodiment Six, which will not be repeated here, the main difference lies in the pressing plate a 292 , the pressing component a 220  and the transmitting component a 280  of Embodiment Ten. Differing from Embodiment Six, the sliding block structure is not included in the present embodiment. 
     The pressing plate a 292  is hinged with an acting block a 290   a  on the surface of the baffle plate a 290 , the pressing plate a 292  can rotate about the acting block a 290   a , and the pressing plate a 292  and the acting block a 290   a  are assembled at a position adjacent to the front end of the baffle plate a 290  with respect to the installation direction of the process cartridge aC. As shown in  FIG. 64 , the pressing plate a 292  is rotatably hinged with the acting block a 290   a  of the baffle plate a 290  via a circular hole a 292   c , one end thereof is a pressing portion a 292   a  which contacts the protrusion a 220   b  on the surface of the pressing component a 220 ; preferably, in order to avoid structure interference with the baffle plate a 290 , the pressing portion a 292   a  is configured as a bend structure in the present embodiment. The other end of the pressing plate a 292  is a pressed portion a 292   b.    
     As shown in  FIG. 65 , inserting the coupling component a 210  into the circular hole a 220   a  of the pressing component a 220 ; after the circular hole a 216   a  is located below the pressing component a 220 , inserting the connecting part a 213  into the circular hole a 216   a  of the coupling component a 210 , so that the coupling component a 210  fits with the pressing component a 220  to be a whole part. The bottom surface a 285  of the transmitting component a 280  is provided with a circular hole a 286 , after the coupling component a 210  is installed on the transmitting component a 280 , the connecting part a 216  of the coupling component a 210  will go through the circular hole a 286 , so that the coupling component a 210  can move along direction aY through the positioning of the circular hole a 286  and the circular hole a 220   a  of the pressing component a 220 . The inner wall of the transmitting component a 280  is further provided with a limiting sliding groove a 283 , after the coupling component a 210  is installed in the transmitting component a 280 , the two ends of the connecting part a 213  will be located in the limiting sliding groove a 283 , so that the transmitting component a 280  can rotate together with the coupling component a 210 . A spring a 250  is further provided between the connecting part a 213  and the bottom surface a 285  of the cavity a 282 , one end of the spring a 250  abuts the bottom surface a 285 , the other end abuts on the connecting part a 213 , and the spring a 250  will apply a force along the direction opposite to the direction aY on the connecting part a 213 , so that the connecting part a 213  abuts on the lower surface of the pressing component a 220 . 
     The installing process of the process cartridge can be referred to Embodiment Six, which will not be repeated here, the main difference between the present embodiment and Embodiment Six lies in the removing process of the process cartridge aC from the electrophotographic image forming device. 
     As shown in  FIG. 66 a   , when the process cartridge aC is installed in the electrophotographic image forming device, the axial direction of the rotating part of the process cartridge aC is substantially perpendicular to the lateral wall of the electrophotographic image forming device; when removing the process cartridge aC from the electrophotographic image forming device, as shown in  FIG. 66 b   , the process cartridge aC will incline to a certain angle due to the tight engagement of the driving head a 900  and the coupling component a 210  or/and the user catching the catching portion ab 3  in the middle of the process cartridge aC to draw it out; at this time, as the process cartridge aC inclines, the pressed portion a 292   b  of the pressing plate a 292  contacts the lateral wall a 910   b , the lateral wall a 910   b  will apply a force on the pressed portion a 292   b , so that the pressing plate a 292  rotates about the hinge point; the pressing portion a 292   a  which contacts the protrusion a 220   b  of the pressing component a 220  presses the pressing component a 220 , pushes the pressing component a 220  to move downward and then press the connecting part a 213  so that the coupling component a 210  also moves downward along direction aY; the rotational force driving assembly a 200  and the driving head a 900  disengages, thus the process cartridge aC is successfully removed from the electrophotographic image forming device. 
     Embodiment Eleven 
     As shown in  FIG. 67 , in Embodiment Eleven, the baffle plate a 290 , the elastic member a 250 , the sliding piece a 230  etc of the rotational force driving assembly a 200  are referred to the relevant parts of Embodiment Six, which will not be repeated here, the main difference lies in the transmitting component a 280  of Embodiment Eleven. 
     As shown in  FIG. 68 a    and  FIG. 68 b   , the transmitting component a 280  includes a gear portion a 280   a  and an end cover a 280   b . The gear portion a 280   a  is a through hole, a limiting sliding groove a 280   a   1  is provided in its interior, and a stopping block a 280   a   2  is provided on the limiting sliding groove a 280   a   1 ; the end cover a 280   b  includes a circular cover portion a 280   b   3  which fits with the gear portion a 280   a , a limiting block a 280   b   2  and a latching buckle a 280   b   1  which fixes the gear portion a 280   a  and the end cover a 280   b  together. 
     As shown in  FIG. 68 b   , the assembling relationship between the gear portion a 280   a  and the end cover a 280   b  is: assembling one end of the end cover a 280   b  with the latching buckle a 280   b   1  from the bottom of the gear portion a 280   a , the latching buckle a 280   b   1  enters an opening a 280   a   3  of the gear portion a 280   a , and is pressed by the inner wall of the opening a 280   a   3  and deforms inward; until the end cover a 280   b  moves to the set position, the latching buckle a 280   b   1  latches a positioning boss a 280   a   4  provided on the inner wall of the opening a 280   a   3 , meanwhile, the limiting block a 280   b   2  contacts the bottom surface of the gear portion a 280   a.    
     As shown in  FIG. 67  and  FIG. 69 , assembling relationship among the parts of the rotational force driving assembly a 200  is: the pressing component a 220  fits with the sliding groove a 232  at two sides of the surface of the sliding piece a 230  in a slidable manner through the built-in long sliding block a 223 ; the coupling component a 210  goes through the through hole a 236  of the sliding piece a 230  and the pressing component a 220  through the connecting part a 216 , the limiting surface a 212  of the coupling component a 210  abuts the positioning surface a 235  of the sliding piece a 230 ; the latching buckle a 219  is embedded in the latching slot a 218  of the coupling component a 210  stretched from the sliding piece a 230  so as to fix the coupling component a 210  on the sliding piece a 230  in axial direction; the installed pressing component a 220 , the coupling component a 210 , the sliding piece a 230  and the latching buckle a 219  are installed as a whole in the opening a 280   a   3  of the gear portion a 280   a . The connecting part a 260  is installed from the bottom opening of the gear portion a 280   a , and goes through the sliding groove a 215  of the coupling component a 210 , two ends of the connecting part a 260  are limited in the limiting sliding groove a 280   a   1  in the opening a 280   a   3 ; one end of the spring a 250  is fixed on the fixing cylinder a 280   b   4  of the end cover a 280   b , then the end cover a 280   b  is installed on the gear portion a 280   a  from one end where the connecting part is installed into, and fixed with the gear portion a 280   a  through the latching buckle a 280   b   1 . 
     The relative movement relationship between the coupling component and the transmitting component can be referred to the movement relationship in Embodiment Six. 
     Through the structure configuration in Embodiment Eleven, after assembling the rotational force driving assembly, the two ends of the limiting sliding groove a 280   a   1  are closed, the connecting part can only move in the limiting sliding groove, so that the rotational force driving assembly can form as a whole. In addition, the connection manner of the end cover and the gear portion can be achieved by welding, gluing etc. 
     From the above Embodiment Six to Embodiment Eleven, in order to facilitate the user to remove the process cartridge aC from the electrophotographic image forming device more easily, as shown in  FIG. 66 b   ,  FIG. 70 a   ,  FIG. 70 b   , the other end a 500  which is distal to the coupling component a 210  of the process cartridge aC is provided with a limiting protrusion a 500   a ; the limiting protrusion a 500   a  abuts a lateral wall a 910   a  in the electrophotographic image forming device when installing the process cartridge aC into the electrophotographic image forming device, so as to limit the displacement of the process cartridge aC in the axial direction in the electrophotographic image forming device, and prevent the coupling component a 210  of the process cartridge aC from disengaging with the driving head a 900  on another lateral wall a 910   b  during developing operation. 
     A conductive pin a 501  which is conductive with the photosensitive member a 10  is provided in the limiting protrusion a 500   a . The limiting protrusion a 500   a  is provided with a guiding surface a 500   a   1 , the guiding surface a 500   a   1  gradually extends outward with respect to the housing surface of the other end a 500  of the process cartridge; the guiding surface a 500   a   1  is provided adjacent to the front end with respect to the installation direction aA 1  of the process cartridge, and the guiding surface a 500   a   1  is preferably a bevel or a curved surface inclining with respect to the axial direction of the developing member a 30  or the photosensitive member a 10 , as shown in  FIG. 70 c   . As shown in  FIG. 71 , when removing the process cartridge aC from the electrophotographic image forming device, through the configuration of the guiding surface a 500   a   1 , the abutting surface between the limiting protrusion a 500   a  and the lateral wall a 910   a  reduces, so that during the removing process of the process cartridge aC the rotational axis of the coupling component a 210  or the transmitting component a 280  inclines with respect to the rotational axis of the driving head a 900  (an inclined angle aR 1  exists therebetween), or the installation direction aA 1  of the process cartridge aC inclines with respect to the removing direction aA 2  (an inclined angle aR 2  exists therebetween). Through the relative inclining of the process cartridge aC, a space of a certain extent forms between the coupling component a 210  and the driving head a 900 ; at this time the projection a 211  disengages with the driving pin a 910 , it is easier to remove the process cartridge aC from the electrophotographic image forming device, and the structure interference between the limiting protrusion a 500   a  of the process cartridge aC and the lateral wall a 910   a  or between the coupling component a 210  and the driving head a 900  is reduced. 
     In addition, as shown in  FIG. 72 a    and  FIG. 72 b   , the limiting protrusion a 500   a  can also adopt a stretchable structure with respect to the housing of the process cartridge aC, which further includes an elastic member a 502  and a latching slot a 500   a   2  provided on the housing of the other end a 500  for fitting with the limiting protrusion a 500   a . The assembling relationship therebetween is: the elastic member a 502  is provided in the concave hole of the limiting protrusion a 500   a , then the limiting protrusion a 500   a  is installed in the latching slot a 500   a   2 , and is fixed in the latching slot a 500   a   2  through the latching buckle a 500   a   3  of the limiting protrusion a 500   a , so that the limiting protrusion a 500   a  is stretchable with respect to the housing of the other end a 500  of the process cartridge aC through the elastic member a 502 . Finally, the conductive pin a 501  passes through the limiting protrusion a 500   a , the elastic member a 502  is inserted into the circular hole of the latching slot a 500   a   2 . Preferably, the elastic member a 502  in the present embodiment is a spring or an elastic sponge. Through the above stretchable limiting protrusion a 500   a , when removing the process cartridge aC from the electrophotographic image forming device, under the pressing through the abutment of the lateral wall a 910   a , the limiting protrusion a 500   a  retracts inward to avoid structure interference with the lateral wall a 910   a , so that the process cartridge aC can be inclined with respect to the installation direction aA 1  when being removed so as to facilitate removing of the process cartridge aC. 
     In addition, as shown in  FIG. 73 , in order to facilitate the process cartridge aC to be removed from the electrophotographic image forming device easier and achieve the relative inclining during the removing process, the catching portion ab 3  on the process cartridge aC is closer to the limiting protrusion a 500   a  on one end of the housing of the process cartridge aC than the rotational force driving assembly a 200  on the other end of the housing of the process cartridge aC. In this way, through the configuration of the catching portion ab 3  which deviates from the center of the housing of the process cartridge aC, the user can more conveniently remove the process cartridge aC from the electrophotographic image forming device, and it is easier to perform the relative inclined removing action of the process cartridge aC. 
     As shown in  FIG. 71 , that is, during the installation and removing process of the above process cartridge aC, when the user installs the process cartridge aC into the electrophotographic image forming device, the rotational axis of the coupling component or the transmitting component of the process cartridge aC is substantially perpendicular to the installation direction aA 1  of the process cartridge aC; when removing the process cartridge aC from the electrophotographic image forming device, since the process cartridge aC is inclined due to the engagement of the coupling component a 210  and the driving head a 900  or the configuration of the guiding surface a 500   a   1 , the removing direction of the process cartridge aC is inclined with respect to the installation direction or inclined with respect to the rotational axis of the driving head a 900 . 
     Embodiment Twelve 
     As shown from  FIG. 74  to  FIG. 76 , a process cartridge b 1  provided by Embodiment Twelve includes a housing b 2 , the housing includes a frame body and side plates b 4  provided at two sides of the frame body, where the frame body is provided with a developing agent accommodating cavity and a developing member b 5  in its interior; a rotational force driving assembly b 6  and a gear assembly are provided at the end portion of the process cartridge b 1 , the gear assembly includes a hub b 7   a  connected with the rotational force driving assembly b 6 , a developing member gear b 7   c  and a toner feeding member gear b 7   b  which are connected with the hub b 7   a , in which the hub b 7   a  is preferably adopted as a rotating member which receives the rotational torque of the rotational force driving assembly b 6 ; the rotational force driving assembly b 6  includes: a rotational force receiving component b 61  configured to receive an external force; a force transmission part which transmits the driving force received by the rotational force receiving component b 61  to the rotational member in the process cartridge, and the rotational force receiving component b 61  can move with respect to the force transmission part. Preferably, the force transmission part is a cylinder b 66 , a through hole (not shown) is provided on the cylinder b 66 , and a pin is inserted in the through hole of the cylinder, the force is transmitted to the hub b 7   a  through the pin (refer to Embodiment Five,  FIG. 94  and  FIG. 95 ), or a protrusion (not shown) is extended from the inner wall of the hub b 7   a , thus the force is transmitted to the hub b 7   a  by the cylinder b 66  in an abutting manner between the cylinder b 66  and the inner wall of the hub b 7   a ; a guide rail, provided on the side plate b 4 , the guide rail includes bevels b 41  and b 42  which incline from the axis of the force transmission part; and an adjusting mechanism b 63 , located between the rotational force receiving component b 61  and the guide rail, the adjusting mechanism b 63  is configured so that when the rotational force receiving component b 61  moves with respect to the force transmission part, the adjusting mechanism b 63  shifts in both the axis direction of the rotational member and the direction perpendicular thereto. 
     The manner that the rotational force receiving component b 61  moves with respect to the force transmission part is specifically shown from  FIG. 76  to  FIG. 78 , the rotational force receiving component b 61  can be in a first state that it is coaxial with the cylinder b 66  and in a second state that it is not coaxial with the cylinder b 66 .  FIG. 77  shows the first state of the rotational force receiving component b 61  which is coaxial with the cylinder b 66 , the distance between the top end of the rotational force receiving component and the upper surface of the hub b 7   a  is bL 1 .  FIG. 78  shows the second state of the rotational force receiving component b 61  which is not coaxial with the cylinder. During the process of the driving force adjusting mechanism b 63  moving along the guide rail, with respect to the first state, the rotational force receiving component b 61  retracts a distance of bL 1 -bL 2  (which is the difference value of the bL 1  and bL 2 ) towards the housing of the process cartridge in the axial direction of the rotational force receiving component b 61 , and deviates a distance of bL 3  towards the direction away from the hub b 7   a  in the direction perpendicular to the axial direction of the rotational force receiving component b 61 , and the axis of the rotational force receiving component b 61  is always parallel with the axis of the hub b 7   a.    
     As shown in  FIG. 76  and  FIG. 78 , preferably, the rotational force driving assembly b 6  includes the rotational force receiving component b 61 , the adjusting mechanism b 63 , a limiting component b 62 , a crossed coupling, where the crossed coupling includes an upper end portion b 64 , a middle sliding block b 65  and a cylinder b 66 . The rotational force receiving component b 61  includes two claws b 611  and b 612  which fit with the transmitting pins b 1001   b  and b 1001   c  on the rotational force driving head b 102  in the electrophotographic image forming device; the whole rotational force receiving component b 61  is substantially a flat U shape, thus the U shape bottom can better abut the head portion b 1001   a  of the rotational force driving head b 102 , and the flat shape facilitates better engagement between the rotational force receiving component b 61  and the rotational force driving head b 102  when the process cartridge is installed. A protrusion is provided on the upper end portion b 64  of the crossed coupling, which can be inserted into the concave hole b 613  on the rotational force receiving component b 61 , obviously, the upper end portion b 64  can also be integrated with the rotational force receiving component b 61  as a whole. A first groove which fits with the upper end portion b 64  is provided on the upper surface of the middle sliding block b 65 , a second groove perpendicular to the first groove is provided on the lower surface, and the second groove fits with the cylinder b 66 ; in this way, under the action of the crossed coupling, the rotational force receiving component can move about the axis of the hub b 7   a  in a plane. The driving force adjusting mechanism b 63  includes a circular sleeve b 631  which is sleeved on the cylinder portion of the upper end portion b 64 , two inclined bosses are extended from a side of the circular sleeve b 631 , and the two inclined bosses respectively includes an inclined sliding surfaces b 632  and b 633 . A reset part is provided between the cylinder b 66  and the inner wall of the hub b 7   a , the reset part can keep the rotational force receiving component b 61  and the crossed coupling in the first state, the reset part can be any member including spring, tension spring or magnet etc, which in the present embodiment is preferably a tapered spring b 67 , and one end of the tapered spring b 67  abuts the inner side of the cylinder b 66 , the other end abuts a stepped surface b 7   a   1  in the hub b 7   a . The limiting component b 62  includes an inner circle, the inner circle is provided with a circular curved section b 621 ; the two ends of the circular curved section b 621  respectively include inner circle planes b 622  and b 625 , and inner bevels b 624  and b 623  extend inward respectively from the two inner circle planes b 622  and b 625 . After completing assembling the rotational force driving assembly, the inclined sliding surface b 632  of the boss is located between the bevel b 41  and the inner circular bevel b 624 , the inclined sliding surface b 633  of the boss is located between the bevel b 42  and the inner circular bevel b 623 , and the circular sleeve b 631  is sleeved on the outer portion of the upper end portion b 64 . Before installing the process cartridge b 1  in the electrophotographic image forming device, the rotational force receiving component b 61  is in the first state shown in  FIG. 77 ; in the process of installing the process cartridge, the rotational force receiving component will abut the rotational force driving head b 102 , then the rotational force receiving component b 61  will be subjected to an external force and move along the opposite direction of the installation direction; during moving of the rotational force receiving component b 61 , the adjusting mechanism b 63  will also receive a same external force, and will move along the guide rail under the action of the external force; to be specific, the inclined sliding surface b 632  and b 633  of the boss move respectively along the bevels b 41  and b 42 , then the force and the direction of which is opposite to the installation direction, received by the adjusting mechanism b 63  is divided into two forces respectively along the axial direction of the rotating member and along the direction perpendicular to the axial direction of the rotating member, and under the action of the driving mechanism b 63  the rotational force receiving component b 61  will be in the second state; the limiting component b 62  can facilitate the movement of the adjusting mechanism along the preset guide rail; after the installation of the process cartridge is accomplished, the rotational force driving head b 102  is substantially coaxial with the rotational force receiving component b 61  in the axial direction, so that the rotational force receiving component b 61  will be in the first state under the action of the reset part, and can receive a rotational force from the rotational force driving head b 102 . When removing the process cartridge b 1  from the electrophotographic image forming device, the rotational force receiving component b 61  will turn into the second state from the first state in which the force is transmitted, the rotational force receiving component b 61  retracts toward the frame side of the process cartridge in the axial direction of the rotating member, the interference with the rotational force receiving component b 61  will not occur, in this way, the process cartridge can be successfully removed; after the process cartridge is completed removed, the rotational force receiving component b 61  will turn into the first state under the action of the reset part. 
     As shown in  FIG. 76 , preferably, the process cartridge b 1  further includes a latching buckle b 68  configured to prevent the cylinder b 66  from detaching, the cylinder b 66  can be inserted into the through hole b 7   a   2  of the hub b 7   a , and the outer size of the cylinder b 66  is less than the size of the hub through hole b 7   a   2 , the inner size of the latching buckle b 68  is less than the outer size of the cylinder b 66  and is larger than the size of the through hole b 7   a   2 ; in this way, the cylinder b 66  can be inserted into the hub through hole b 7   a   2  first, then the latching buckle b 68  is latched on the cylinder b 66 , thus the cylinder b 66  will not detach from the hub b 7   a  by using the latching buckle b 68 . 
     It should be noted that, the function of the crossed coupling is to better fit with the rotational force receiving component b 61  in the second state, so that the axis of the rotational force receiving component b 61  is always parallel to the axis of the rotating member; and the upper end portion b 64  can be integrated with the rotational force receiving component b 61  as a whole. 
     Embodiment Thirteen 
     A process cartridge provided by Embodiment Thirteen also includes a housing, the housing also includes a frame body and side plates located on two sides of the frame body, a developing agent accommodating cavity and a developing member; a rotational force driving assembly and a gear assembly, the gear assembly includes a gear connected with the rotational force driving assembly, a developing member gear and a toner feeding member gear which are connected with the hub, in which the gear is preferably adopted as a rotating member which receives the rotational torque of the rotational force driving assembly; and the adjusting mechanism is configured so that when the rotational force receiving component b 61  in the rotational force driving assembly moves with respect to the force transmission part, the adjusting mechanism shifts in both the axis direction of the rotational member and the direction perpendicular thereto. The process cartridge further includes a tapered spring b 67 , one end of the tapered spring b 67  abuts the inner side of the cylinder b 66 , the other end abuts the stepped surface b 7   a   1  in the hub b 7   a ; and a latching buckle b 68  configured to prevent the cylinder b 66  from detaching from the cylinder b 66 . However, the difference lies in that: 
     As shown from  FIG. 79  to  FIG. 81 , the adjusting mechanism b 63  moves perpendicular to the axis of the hub b 7   a , at least a portion of the rotational force driving assembly b 6  abuts the bevels b 4   a  and b 4   b  on the guide rail. Specifically, as shown in  FIG. 79 , the adjusting mechanism b 63  includes a second circular sleeve b 63   a  which is sleeved on the bottom of the rotational force receiving component b 61  (after the driving assembly is assembled, the bottom of the rotational force receiving component b 61  is the upper end portion b 64 ), and second bosses b 63   b  and b 63   c  which are symmetrically provided on the side wall of the circular sleeve. As shown in  FIG. 79  and  FIG. 80 , the rotational force driving assemble is further provided with a limiting component b 62 , the limiting component b 62  includes limiting planes b 62   a  and b 62   b  which fit with the bosses, and the planes (i.e. the upper surface of the boss) of the second bosses b 63   b  and b 63   c  on the adjusting mechanism can slide with respect to the limiting planes b 62   a  and b 62   b  of the limiting component. As shown in  FIG. 81 , the guide rail includes second bevels b 4   a  and b 4   b  which are provided on the side plate b 4 . 
     After the rotational force driving assembly of the process cartridge is assembled, a cylinder b 66  which is similar to Embodiment Twelve is arranged coaxial to the hub b 7   a , under the action of the reset part, the rotational force receiving component b 61  is arranged coaxial to the hub b 7   a ; during installing process or removing process of the process cartridge, the rotational force receiving component b 61  receives an external force from the rotational force driving head b 102  in the electrophotographic image forming device, meanwhile the adjusting mechanism b 63  moves along a direction preset by the limiting component b 62 , through the adjusting mechanism b 63 , the upper end portion b 64  of the crossed coupling at the bottom of the rotational force receiving component b 61  moves together with the rotational force receiving component b 61 ; and the upper end portion b 64  or the middle sliding block b 65  abuts the second bevels b 4   a  and  4   b  on the side plate b 4 , in this way, the rotational force receiving component b 61  is in the second state which is similar in Embodiment Twelve. 
     Embodiment Fourteen 
     In  FIG. 82 , the process cartridge b 1  includes a developing unit b 12  and a cleaning unit b 11 ; in addition, developing agent, a charging member, a developing member and a photosensitive member are also provided in the process cartridge b 1 . After the process cartridge b 1  is installed into the electrophotographic image forming device (not shown in the figure), the rotating part in the process cartridge is driven by the electrophotographic image forming device to rotate, for example, through the engagement between the rotational force driving head b 21  in the electrophotographic image forming device and the rotational force driving assembly b 6  in the process cartridge, after starting the electrophotographic image forming device, the rotational force driving head b 21  transmits a rotational force to the rotational force driving assembly b 6 , so as to drive the rotating member in the process cartridge to rotate, for example, the photosensitive member which is one of the rotating members is driven to rotate, then photosensitive member or the component provided on the photosensitive member drives other rotating members (such as the charging member, the developing member etc) in the process cartridge, and finally the objective of printing the developing agent in the process cartridge b 1  onto the medium is achieved. 
     As shown in  FIG. 82 , coordinate direction by is the longitudinal direction of the process cartridge b 1 , a rail (not shown) for guiding the installation of the process cartridge b 1  is provided in the electrophotographic image forming device, specifically, the rail will guide the process cartridge b 1  to be installed along a direction perpendicular to the longitudinal direction of the process cartridge, that is, to be installed along the coordinate direction bX. The rotational force driving assembly b 6  is arranged at one end of the process cartridge b 1  along the longitudinal direction of the process cartridge b 1 , at least a portion of the rotational force driving assembly b 6  is exposed at the end portion of the process cartridge b 1  in the longitudinal direction; the rotational force driving head b 21  is arranged in the electrophotographic image forming device in a direction perpendicular to the installation direction of the process cartridge b 1 , and is opposite to the end portion of the process cartridge b 1  at which the rotational force driving assembly b 6  is provided. After the process cartridge b 1  is installed in the electrophotographic image forming device, the rotational force driving assembly b 6  engages with the rotational force driving head b 21  to transmit force. The rotational force driving assembly b 6  includes an engaging portion, an adjusting mechanism and an intermediate connection portion; the engaging portion is configured to receive an external driving force; the adjusting mechanism makes the engaging portion shift with respect to the longitudinal direction of the process cartridge, and makes the axis of the engaging portion deviate substantially in parallel with respect to the axis of the photosensitive member; the intermediate connection portion transmits torque between the engaging portion and the photosensitive member hub. 
       FIG. 83  is a stereo diagram of the rotational force driving assembly b 6 ,  FIG. 84  is an exploded diagram of the rotational force driving assembly b 6 . As shown in  FIG. 84 , the rotational force driving assembly b 6  includes the rotational force receiving component b 61 , the side plate b 4 , a wedge base b 133 , a latching buckle b 134 , a flexible shaft b 135 , a spring b 136  and a photosensitive member hub b 137 . In the present embodiment, the rotational force driving assembly b 6  is arranged at one end portion of the photosensitive member b 1003 , the photosensitive member hub b 137  is coaxial to the photosensitive member b 1003  and is fixedly connected thereto; under the condition that no external force exists, the axis of the of the rotational force receiving component b 61  is coaxial to the axis of the photosensitive member hub b 137 . The engaging portion is the rotational force receiving component b 61 , the adjusting mechanism includes the side plate b 4 , the wedge base b 133  and the spring b 136 , at least a portion of the intermediate connection portion is provided as reelable, the reelable portion is the flexible shaft b 135 . 
       FIG. 85  is a schematic assembling drawing of the rotational force driving assembly b 6 . As shown in  FIG. 85 , the outer periphery of the photosensitive member hub b 137  is provided with a hub gear b 1373 , a hollow portion b 1371  is in its interior, the bottom thereof includes a hub boss b 1372 , the hub boss b 1372  is provided with a square hole b 1374 ; and end portion of the rotational force receiving component b 61  includes a plurality of claws b 1311 , in the present embodiment preferably two claws, which are configured to engage with the rotational force driving head in the electrophotographic image forming device to transmit force; as shown in  FIG. 86 , the body portion of the rotational force receiving component b 61  is of cylindrical structure, its outer periphery is provided with a cylindrical boss b 1313 , so that the diameter bD 2  of the outer periphery of a portion of the cylinder of the rotational force receiving component b 61  is less than the diameter bD 1  of the outer periphery of another portion of the cylinder (as shown in  FIG. 87 ), the cylinder portion with diameter bD 1  is closer to the end portion at which the claw b 1311  of the rotational force receiving component b 61  is located, the other end portion of the body is provided with a latching slot b 1314 , configured to install the latching buckle b 134 ; in addition,  FIG. 87  is a cross sectional diagram of the rotational force receiving component b 61 , a blind hole b 1312  is provided in the interior of the rotational force receiving component b 61 , and the cross section of the blind hole b 1312  is a square. 
     The flexible shaft b 135  shown in  FIG. 88  includes a body portion b 1351 , a first end portion b 1352  and a second end portion b 1353 ; the body portion b 1351  is cylindrical, the first end portion b 1352  and the second end portion b 1353  are cut as square shape to fit with the square hole b 1374  at the end portion of the photosensitive member hub b 137  and fit with the square blind hole b 1312  in the rotational force receiving component b 61 . The square hole b 1374  can be arranged at two ends of the flexible shaft b 135 , accordingly, the end portion of the rotational force receiving component b 61  can be made as square cylinder which can fit with the square hole b 1374 , a square cylinder which may fit with the square hole b 1374  is accordingly provided in the photosensitive member hub b 137 . 
     Specifically, the structure of the flexible shaft is formed by winding a plurality of layers of steel wires, the area bJ shown in  FIG. 89  shows the interior structure of the flexible shaft b 135 , which is another layer of winded steel wire, and is wrapped inside the outer layer; the area bK shown in the partial sectional diagram of  FIG. 90  shows that the flexible shaft b 135  is formed by winding a plurality of layers of steel wires; specifically, the winding direction of each layer of steel wire is the same, that is, all right-handed rotation or all left-handed rotation; the plurality layers of steel wire can be two layers, three layers or more, which can be arranged according to design requirements, the rigidity of the flexible shaft as well as its capability of transmitting torque can be changed by changing the diameter of the steel wire or the number of winding layers of the flexible shaft. 
       FIG. 85  shows the wedge base b 133 ,  FIG. 91  is a stereo diagram of the wedge base b 133  (the same with the sliding piece a 230  in Embodiment Six). A base through hole b 1331  is provided at the middle portion of the wedge base b 133 , the base through hole b 1331  is configured to fit with the cylindrical body portion of the rotational force receiving component b 61 , the diameter bD 3  of the base through hole b 1331  is less than the diameter bD 1  of the outer periphery of the rotational force receiving component b 61 , and fits with the cylinder of the bD 2  portion shown in  FIG. 87 ; after the rotational force receiving component b 61  is installed into the base through hole b 1331  of the wedge base b 133 , the latching buckle b 134  shown in  FIG. 85  is latched into the latching slot b 1314  of the rotational force receiving component b 61 , the upper top surface b 1334  of the wedge base (the same with the positioning surface a 235  of Embodiment Six) abuts the surface of the cylindrical boss b 1313  (the same with the limiting surface a 212  of Embodiment Six) of the rotational force receiving component b 61 , so that the rotational force receiving component b 61  is relatively fixed and connected to the wedge base b 133 , and the rotational force receiving component b 61  can rotate with respect to the wedge base b 133 ; the wedge base b 133  includes two base inclined sliding surface b 1333   a  and b 1333   b  located at opposite sides, base protrusions b 1332   a  and b 1332   b  are provided at the other two opposite sides of the wedge base b 133 . 
       FIG. 85  shows the side plate b 4 ,  FIG. 92  is a stereo diagram of the side plate b 4 . The middle portion of the side plate b 4  includes a hollow portion b 421  (the same with the inner hole a 299  of Embodiment Six), configured to place the wedge base b 133 . The inner surface of opposite sides of the side plate hollow portion b 421  is provided with two side plate concave portion b 422   a  and b 422   b , configured to place the base protrusion b 1332   a  and b 1332   b  provided on the wedge base b 133 . 
       FIG. 93  is a diagram of the side plate b 4  diagramming from the bottom surface, as shown in the figure, the inner surface of the side plate hollow portion b 421  includes a pair of side plate bevels b 421   a  and b 421   b  located at opposite sides, the two side plate bevels fit with base inclined sliding surfaces b 1333   a  and b 1333   b  of the wedge base; the inner surface of the side plate hollow portion b 421  further includes two opposite side plate planes b 421   c  and b 421   d ; side plate concave portions b 422   a  and b 422   b  shown in  FIG. 92  are respectively arranged on the side plate planes b 421   c  and b 421   d , which is shown by the dotted circle in  FIG. 93 ; the side plate concave portions b 422   a  and b 422   b  are of the same structure, and are arranged on opposite positions of the lateral planes b 421   c  and b 421   d , however, the opposite positions are not in a connection line, but are arranged stagger; the shape of the side plate concave portion is a structure like an inverted triangle with upper end opening narrower than the lower end opening, as shown in the sectional diagram of  FIG. 94 ; the side plate concave portion b 422   a  includes concave bevels b 422   a   1  and b 422   a   2  which are in mirror symmetry, a protrusion b 423   a  which protrudes towards the interior of the side plate hollow portion b 421  is provided on the central axis of these two mirror symmetrical concave bevels; since the structures of the side plate concave portions b 422   b  and b 422   a  are the same, the side plate concave portion b 422   b  includes symmetrical concave bevels b 422   b   1  and b 422   b   2 , and is further provided with a protrusion b 423   b.    
       FIG. 94  shows the sectional diagram bB-bB of the side plate b 4 , the shape of the side plate concave portion b 422   b  and its position on the side plate are shown as the dotted circle, the top of the protrusion b 423   b  is a tip portion, which includes a protrusion vertex b 423   b   1 , vertex inclined sliding surface b 423   b   2  and b 423   b   3  located at two sides of the protrusion vertex b 423   b   1 , and vertex planes b 423   b   4  and b 423   b   5  located at two sides of the protrusion vertex. 
     Through the understanding of the structures of each part of the rotational force driving assembly b 6 , the assembling relationship of the rotational force driving assembly b 6  can be understood. To be specific,  FIG. 85  is a schematic assembling drawing of the rotational force driving assembly b 6 . First the wedge base b 133  is installed into the side plate hollow portion b 421  of the side plate b 4  according to matching relationship of its shape, the matching relationship after the wedge base b 133  is installed into the side plate hollow portion b 421  of the side plate b 4  is as shown in bA-bA sectional diagram of  FIG. 95 , the base protrusions b 1332   a  and b 1332   b  are respectively located in the side plate concave portions b 422   b  and b 422   a  of the side plate b 4 ; then the rotational force receiving component b 61  is installed into the base through hole b 1331  of the wedge base b 133 , the latching buckle b 134  is latched into the latching slot b 1314 , so that the rotational force receiving component b 61  is relatively fixed with the wedge base b 133 ; then one end of the flexible shaft b 135  is inserted into the square hole b 1374  of the hub b 137 , the spring b 136  is sleeved on the flexible shaft b 135 , and then the assembled wedge base b 133 , the rotational force receiving component b 61  and the side plate b 4  are installed as a whole on the photosensitive member hub b 137 , the blind hole b 1312  of the rotational force receiving component should be aligned with the other end of the flexible shaft b 135  to be installed, then the side plate is fixed on the process cartridge via a screw, so as to fix the rotational force driving assembly b 6  on the process cartridge b 1 . Through the fit of the end portion of the flexible shaft b 135 , the photosensitive member hub b 137  and the base through hole b 1331  of the wedge base b 133 , the objective of force transmission can be achieved. After assembling, the photosensitive member hub b 137  is coaxial with the photosensitive member b 1003  and is relatively fixed thereto, the flexible shaft b 135  and the spring b 136  are arranged between the photosensitive member hub b 137  and the rotational force receiving component b 61 , one end of the spring b 136  abuts the hub boss b 1372  of the photosensitive member hub b 137 , the other end abuts the bottom surface of the wedge base b 133 ; after assembling, the spring b 136  has a certain amount of compression, so that the wedge base b 133  contacts the hollow portion of the side plate b 4 , and the wedge base b 133  can slide with respect to the side plate b 4 , during the relative movement, the rotational force receiving component b 61  is driven to shift along the direction of its axis bF 2 , and the axis bF 2  is substantially parallelly offset with respect to the axis bF 1  of the photosensitive member hub (the axis of the photosensitive member hub is coaxial with the axis of the photosensitive member); before the relative sliding between the wedge base b 133  and the side plate b 4 , the base protrusions b 1332   a  and b 1332   b  on the wedge base are respectively located above the protrusion vertexes b 423   b   1  and b 423   a   1  of the protrusions b 423   b  and b 423   a  on the side plate b 4 ; when the wedge base b 133  and the side plate b 4  slide relatively, meanwhile, the base protrusions b 1332   a  and b 1332   b  on the wedge base can slide with respect to the concave bevels b 422   b   1  and b 422   a   2  at the same time, or slide with respect to the concave bevels b 422   b   2  and b 422   a   1 . 
       FIG. 96 a    to  FIG. 96 d    are schematic diagrams which show the process that the process cartridge is installed into the electrophotographic image forming device, and the rotational force receiving component b 61  located on the end portion of the process cartridge b 1  engages with the rotational force driving head b 21  in the electrophotographic image forming device. In the figures, the direction shown by the arrow is the installation direction of the process cartridge b 1  (the installation direction is perpendicular to the longitudinal direction of the process cartridge). When installing the process cartridge b 1  into the electrophotographic image forming device along the direction shown by the arrow, the end portion of the rotational force receiving component b 61  contacts the end portion of the rotational force driving head b 21  in the electrophotographic image forming device, at this time, they are in the interference stage, as shown in  FIG. 96 ; as the further installation of the process cartridge b 1 , the rotational force receiving component b 61  makes the wedge base b 133  slide with respect to the side plate b 4  through the interaction force between the rotational force receiving component b 61  and the rotational force driving head b 21 , at this time, the rotational force receiving component b 61  deviates towards the direction opposite to the installation direction of the process cartridge b 1 , that is, the base inclined sliding surface b 1333   a  of the wedge base b 133  relatively slides with respect to the side plate bevel b 421   a  which engages with it; at this time, the base protrusion b 1332   a  on the wedge base slides along the side plate bevel b 422   b   2  of the side plate b 4 , the base inclined sliding surface b 1333   a  slides along the side plate bevel b 421   a ; the axis F 2  of the rotational force receiving component b 61  is parallelly offset with respect to the axis bF 1  of the photosensitive member hub b 137 , and the rotational force receiving component b 61  retracts in its axis bF 1  and along the direction opposite to the extending direction of the rotational force receiving component from the process cartridge, which gradually deforms the flexible shaft b 135  to a certain extent, as shown in  FIG. 96 b    and  FIG. 96 c   ; until the end portion of the rotational force receiving component b 61  avoids the rotational force driving head b 21 , as shown in  FIG. 96 c   , the rotational force receiving component b 61  extends due to the springback effect of the spring b 136  and engages with the transmitting pin b 211  on the end portion of the rotational force driving head b 21  through the claw b 1311  on its end portion, at this time, the flexible shaft returns to the initial state, as shown in  FIG. 96 d   , so that the process cartridge is installed in place. Starting the electrophotographic image forming device, the force can be transmitted to the rotational force receiving component b 61  through the rotational force driving head b 21 , then the rotational force can be transmitted to the photosensitive member hub b 137  through the flexible shaft, and then the force is transmitted to the rotating members in the process cartridge. 
       FIG. 97 a    to  FIG. 97 d    are schematic diagrams which show the process that the process cartridge is uninstalled from the electrophotographic image forming device, and the rotational force receiving component b 61  arranged on the end portion of the process cartridge disengages with the rotational force driving head b 21  in the electrophotographic image forming device.  FIG. 97 a    shows the state that the rotational force receiving component b 61  still engages with the rotational force driving head b 21 ; when uninstalling the process cartridge along the direction shown by the arrow, the rotational force receiving component b 61  makes the wedge base b 133  to slide with respect to the side plate b 4  through the interaction between the rotational force receiving component b 61  and the rotational force driving head b 21 ; at this time, the inclined sliding surface b 1333   b  of the wedge base b 133  in  FIG. 97 a    slides with respect to the side plate bevel b 421   b  in the side plate b 4  which contacts with it, as shown in  FIG. 97 b   ; meanwhile the protrusion b 1332   a  on the wedge base slides along the concave bevel b 422   b   1  in the side plate b 4 , the protrusion b 1332   b  slides along the concave bevel b 422   a   2 ; under the interaction between the rotational force receiving component b 61  and the rotational force driving head b 21 , the rotational force receiving component b 61  retracts gradually, and its axis bF 2  parallelly offsets with respect to the axis bF 1  of the photosensitive member hub b 137 , as the uninstalling of the process cartridge b 1  from the electrophotographic image forming device, the flexible shaft b 135  is bended and deformed, as shown in  FIG. 97 b    and  FIG. 97 c   , until the rotational force receiving component b 61  completely disengages from the rotational force driving head, as shown in  FIG. 97 c   ; the rotational force receiving component b 61  returns to the initial state under the action of the spring b 136 , the flexible shaft also returns to the initial state, as shown in  FIG. 97 d   ; at last, the process cartridge b 1  is uninstalled from the electrophotographic image forming device. 
       FIG. 98  to  FIG. 101  are schematic diagrams which show the relative movement between the wedge base and the side plate during the process of engagement between the rotational force driving assembly and the rotational force driving head of the electrophotographic image forming device. In order to illustrate the relative movement, the wedge base b 133  is denoted with dotted line, the other parts are shown in sectional diagram. As shown in  FIG. 98 , the dotted line shows the wedge base b 133 , the side plate b 4  is arranged at the end portion of the photosensitive member hub b 137 , the wedge base is arranged at the middle portion of the side plate b 4 ; a protrusion b 423   a  is provided on the side plate b 4 , a base protrusion b 1332   a  is provided on the lateral side of the wedge base b 133 , the base protrusion b 1332   a  relatively slides in the side plate concave portion b 422   b  provided on the side plate b 4 ; when the rotational force driving assembly is not under the action of external force, the base protrusion b 1332   a  on the wedge base b 133  is above the protrusion b 423   b  on the side plate b 4 . 
     When installing the process cartridge into the electrophotographic image forming device, the rotational force receiving component b 61  on the rotational force driving assembly abuts the rotational force driving head b 21  in the electrophotographic image forming device, the action generated between the two parts is applied to the rotational force receiving component b 61 , the rotational force receiving component b 61  further acts on the wedge base b 133 , the wedge base b 133  then slides with respect to the side plate b 4  as shown in  FIG. 99 ; that is, the base inclined sliding surface b 1333   a  of the wedge base b 133  fits with the side plate bevel b 421   a  and relatively slides, and the base protrusion b 1332   a  on the wedge base b 133  slides with respect to the bevel b 423   b   3  on the protrusion portion of the side plate b 4 ; thus, the wedge base b 133  can drive the rotational force receiving component b 61  to parallelly offset with respect to the axis of the photosensitive member hub b 137 ; and the bevel b 421   a  is parallel to the bevel b 423   b   3 , which can limit the swinging of the wedge base b 133  along the direction perpendicular to the axial direction of the photosensitive member hub b 137 . 
     When the wedge base b 133  relatively slides with respect to the side plate b 4  to a certain extent, the lower end portion of the inclined sliding surface b 1333   a  of the wedge base b 133  contacts the inner surface b 1375  of the photosensitive member hub b 137 , as shown in  FIG. 100 . 
     As shown in  FIG. 101 , after the inclined sliding surface b 1333   a  of the wedge base b 133  contacts the inner surface of the photosensitive member hub b 137  is blocked, the relative offset of the wedge base b 133  with respect to the axis of the photosensitive member hub b 137 , the rotational force receiving component b 61  is further subjected to a force, and acts on the wedge base b 133 , the base inclined sliding surface b 1333   a  of the wedge base  133  abuts on the inner surface b 1375  of the photosensitive member hub, and the base protrusion b 1332   a  of the wedge base contacts the lateral plane b 423   b   4  on the protrusion b 423   b  of the side plate; thus, the wedge base b 133  can shift in the direction parallel to the axis of the photosensitive member hub through the two parallel planes b 1375  and b 423   b   4  limiting the sliding of the wedge base b 133 . 
       FIG. 102  is a sectional diagram in the direction opposite to the sectional diagrams shown from  FIG. 98  to  FIG. 101 , the dotted line shows the wedge base b 133 . As shown in  FIG. 102 , the other plane of the wedge base b 133  which is opposite to the plane where the protrusion b 1332   a  is located is provided with a protrusion b 1332   b  which is of the same structure with the protrusion b 1332   a  but is not symmetrically arranged with the protrusion b 1332   a ; similarly, the hollow portion of the side plate b 4  is further provided with a concave portion b 422   a  on the plane opposite to the plane where the concave portion b 422   b  is located, the concave portion b 422   a  is of the same structure with the concave portion b 422   b ; at the moment when the protrusion b 1332   a  relatively slides in the concave portion b 422   a , the protrusion b 1332   b  relatively slides in the concave portion b 422   a . The movement is the same with the movement shown from  FIG. 98  to  FIG. 101 , which will not be repeated here. 
     Through the above manner, the relative sliding track of the wedge base and the side plate is restrained, and the inclining or swinging of the wedge base during the sliding process is avoided, which guarantee the stability of the operation of the rotational force driving assembly. 
     When uninstalling the process cartridge from the electrophotographic image forming device, the rotational force driving head b 21  provided in the electrophotographic image forming device acts on the rotational force receiving component b 61 ; then the rotational force receiving component b 61  acts on the wedge base b 133  so that the wedge base b 133  slides with respect to the side plate b 4 , as shown in  FIG. 103 . At this time, the another inclined plane b 1333   b  on the wedge base b 133  relatively slides with respect to another inclined surface b 421   b  of the side plate b 4 , the base protrusion b 1332   a  of the wedge base slides with respect to the inclined plane b 423   a   2  on the protrusion b 423   a  of the side plate b 4  and the plane b 423   b   5  on the other side, the movement of the wedge base b 133  is, as described above, limited between the surface b 423   a   2  and b 421   b  and between the surface b 423   b   5  and b 1375 , the inclining or swinging of the wedge base b 133  during the sliding process is avoided, which guarantees the stability of the operation of the rotational force driving assembly. Similarly, the protrusion b 1332   b  has the same relative movement in the concave portion b 422   a , which will not be repeated here. 
     The above situation occurs when the rotational force receiving component is subjected to an external force, when the external force disappears, the wedge base can return to the initial state under the action of the spring. 
     Embodiment Fifteen 
     As shown from  FIG. 104  to  FIG. 106 , Embodiment Fifteen provides a process cartridge c 1 , the process cartridge c 1  can be detachably installed into the electrophotographic image forming device. As shown in  FIG. 104 , the process cartridge c 1  includes a process cartridge housing c 2 , a driving assembly c 4  which receives a driving force in the electrophotographic image forming device, a supporting part c 3  provided on the lateral wall of the process cartridge housing c 2 ; the supporting part c 3  is provided with a through hole, the rotational force driving part c 40  of the driving assembly c 4  can pass through the through hole, at least a portion of the driving component is exposed outside the process cartridge housing c 2 . 
     As shown in  FIG. 105  and  FIG. 106 , the process cartridge c 1  includes a toner hopper c 21  for accommodating carbon toner, a waste toner hopper c 22  for collecting waste toner and a photosensitive member c 5 ; the toner hopper c 21  and the waste toner hopper c 22  are respectively provided with crescent arcs c 21   d  and c 22   d  for supporting the above supporting part c 3 ; the inner wall of the supporting part c 3  is provided with guiding bevels c 31  and c 32  which limit the swinging of the driving assembly c 4 , the toner hopper c 21  is provided with extending portions c 21   a  and c 21   b , the waste toner hopper c 22  is provided with through holes c 22   a  and c 22   b , and the extending portions c 21   a  and c 21   b  are respectively hinged with the through holes c 22   a  and c 22   b  through a pins; one end of the photosensitive member c 5  is supported through the supporting part c 3 , the other end is fixed and connected with the through hole c 22   c  of the waste toner hopper c 22  through a pin. The driving assembly c 4  receives a driving force from the electrophotographic image forming device, and drives the photosensitive member to rotate, and a bevel gear c 4   a  is provided outside the hub c 44  of the driving assembly c 4 , the bevel gear c 4   a  can transmit the force to the magnetic roller c 21   e  through the gear c 21   c  at the end portion of the magnetic roller c 21   e , the magnetic roller c 21   e  is always parallel to the axis of the photosensitive member. 
     As shown in  FIG. 106 , in the driving assembly c 4 , the driving component c 40  which receives the driving force from the electrophotographic image forming device is sleeved in the hub c 44  through a coupling, and a spring c 45  is provided between the coupling and the hub c 44 , thus the driving component c 40  can retract in the axial direction with respect to the inner wall of the hub c 44 ; so that the process cartridge c 1  can be installed into the electrophotographic image forming device. 
     As shown in  FIG. 107 , the photosensitive member c 5  provided by the present embodiment includes a photosensitive drum c 50  which can print the image onto the imaging medium (such as paper), the driving assembly c 4  provided at the end portion of the photosensitive drum c 50 ; the photosensitive drum includes a hollow cylinder, a layer for forming static sub-image is provided on the surface of the cylinder; the rotational axis of the driving assembly c 4  is substantially coaxial with the axis of the photosensitive drum c 50 . 
     As shown in  FIG. 108  and  FIG. 109 , the driving assembly c 4  includes a driving component c 40  which receives a driving force of the electrophotographic image forming device, a hub c 44  of the driving assembly c 4  which sleeves the driving component c 40 , the diameter of the outer wall c 4   b  of the hub c 44  is a little larger than the inner diameter of the photosensitive drum c 50 , in this way, the hub of the driving assembly can be installed into the photosensitive drum c 50  in a manner of compressive embedding, and the driving assembly c 4  will not detach from the photosensitive drum c 50 . 
     As shown in  FIG. 109  and  FIG. 110 , the preferred driving component c 40  of the present embodiment can fit with the rotational force driving head c 1002  in the electrophotographic image forming device in  FIG. 121 . The rotational driving head c 1002  includes a driving rod c 1002   d  which connects with the motor, a tapered ball head c 1002   a  provided at the front end of the driving rod c 1002   d , and transmitting pins c 1002   b  and c 1002   c  provided at two sides of the driving rod c 1002   d . The driving assembly c 4  includes a driving component c 40 , the driving component c 40  is provided with an engaging portion for receiving a driving force and a self-adaptive adjusting portion for adjusting the rotation of the engaging portion; preferably, a groove c 40   e  is provided on the driving component c 40 , the engaging portion includes two engaging claws c 40   c  and c 40   d  which are symmetrically arranged in the axis direction of the driving component, the engaging claws c 40   c  and c 40   d  are arranged on the periphery of the groove c 40   e , and the engaging claws c 40   c  and c 40   d  can extend upward along the axial direction of the driving component c 40 ; thus when the driving component c 40  engages with the rotational force driving head c 1002 , the tapered ball head c 1002   a  is located in the groove c 40   e , the transmitting pins c 1002   b  and c 1002   c  respectively engages with the engaging claws c 40   c  and c 40   d , thus the rotational force driving head c 1002  receives a force from the motor and transmits to the driving component c 40 . Preferably, the self-adaptive adjusting portion on the driving component c 40  includes extending portions c 40   a  and c 40   b  which are arranged on the periphery of the groove c 40   e  along the direction perpendicular to the axial direction of the driving component, the extending portions c 40   a  and c 40   b  are arranged to form about 90° angle relative to the engaging claws c 40   c  and c 40   d  on the periphery of the groove c 40   e.    
     Preferably, two grooves are symmetrically provided on the protruding cylinder of the driving component c 40 , each groove is provided with a first plane c 403 , the first plane is substantially perpendicular to the axis of the driving component; a second plane c 404 , which is substantially parallel to the driving component; a first cambered surface c 405  which is arranged opposite to the first plane. 
     As shown in  FIG. 106  and  FIG. 109 , the driving component is sleeved in the hub c 44  through a coupling, a stretching part is provided between the coupling and the hub c 44 , configured to control the axial stretching of the driving component c 40  and the coupling, preferably, the stretching part is a spring c 45  sleeved on the end portion of the coupling, one end of the spring abuts the inner wall of the hub, the other end abuts the coupling; the end portion of the coupling includes a groove c 43   a , the coupling is latched on the hub c 44  through an E shaped latching spring c 51  shown in  FIG. 113  for latching the groove c 43   a , so as to avoid the driving component c 40  from detaching from the hub c 44 . 
     As shown in  FIG. 109 , the coupling is a crossed coupling, the crossed coupling includes a first part c 41 , a second part c 42 , a third part c 43 , the first part c 41  includes an “I” shaped protrusion c 41   a , the second part c 42  includes a sliding groove c 42   b  which fits with the protrusion c 41   a  in the first part and a protrusion c 42   a  corresponding to the sliding groove c 42 , the third part c 43  includes a groove c 43   e  which engages with the protrusion c 42   a  in the second part, pins c 43   c  and c 43   d  which transmit a force to the hub c 44 , cylinder c 43   b  which is sleeved on the spring c 45 , and a groove c 43   a  which fits with the E shaped latching spring c 51 . As shown in  FIG. 106 , preferably, the sliding surface between the groove c 43   e  and the protrusion c 42   a  is inclined from the axis of the driving component, thus during the process of axial shifting of the driving component c 40 , there is a larger distance of travel along the axial direction, which facilitates the disengagement of the driving component c 40  from the rotational force driving head c 1002  in the electrophotographic image forming device. 
     As shown in  FIG. 109  and  FIG. 112 , the exterior of the hub c 44  is provided with a bevel gear c 4   a , a concave cavity c 44   b  which accommodates the coupling, a through hole c 44   d  which can let the cylinder c 43   a  on the coupling pass through is provided in the hub c 44 , two symmetrical grooves c 44   a  and c 44   e  are provided on the inner wall of the hub c 44 , the grooves respectively fit with the pin c 43   c  and c 43   d  which transmit the force on the coupling, and transmit the rotational force of the driving component c 40  to the hub c 44 , so as to drive the photosensitive drum c 50  to rotate. 
     As shown in  FIG. 109  and  FIG. 111 , preferably, a mechanism which controls the driving component c 40  to unidirectionally rotate is provided between the coupling and the driving component c 40 , the mechanism includes springs c 46 , c 47  and cylinders c 48 , c 49  in the through holes c 41   d  and c 41   e  provided in the first part c 41  of the coupling, one end of the cylinders c 48  and c 49  is respectively inserted into the through hole c 41   d  and c 41   e , the other end respectively fits with two grooves which are symmetrically arranged on the protrusion cylinder, one end of the springs c 46  and c 47  is respectively sleeved in the cylinders c 48  and c 49 , the other end contacts the surface of the second part c 42 ; thus, when the driving component c 40  moves along the cA direction in  FIG. 110 , since the cylinders c 48  and c 49  abut the first plane, and the first plane is substantially parallel to the axis of the driving component, the rotation of the driving component c 40  is stopped; however, when the driving component c 40  moves along direction cB in  FIG. 110 , the first cambered surface c 405  can apply a force on the cylinders c 48  and c 49  along direction cB, so that the cylinders c 48  and c 49  continually press the springs c 46  and c 47 , in this way the cylinder will not stop the driving component from rotating along direction cB, therefore the mechanism can control the driving component c 40  to unidirectionally rotate. Preferably, the end portion of the driving component c 40  can pass through the through hole c 41   f  on the first part c 41 , then the driving head is avoided from detaching from the coupling through the E shaped latching spring c 51 . 
     Embodiment Sixteen 
     As shown from  FIG. 114  to  FIG. 118 , another driving assembly is provided, the other portions are the same with Embodiment Fifteen, including a driving component c 140 , a coupling, a controlling mechanism which controls the driving component to unidirectionally rotate, a hub c 148  which accommodates the coupling, and a stretching mechanism which controls the coupling and the driving component to stretch axially. Preferably, the driving component c 140  includes a force engaging portion which receives a force on the rotational force driving head c 1002  in the electrophotographic image forming device, the engaging potion includes engaging claws c 140   a  which is the same with Embodiment Fifteen, the engaging claws are symmetrically arranged on the periphery of a groove; differing from Embodiment Fifteen, the driving component includes an engaging portion, a protrusion c 140   d  and a connecting cylinder c 140   c  which connects the protrusion c 140   d  and the engaging portion, the protrusion c 140   d  of the driving component is directly arranged as a part of the coupling, an self-adaptive adjusting portion is provided on the lateral wall of the connecting cylinder c 140   c , which are two protruding teeth c 140   b  symmetrically arranged. The coupling of the present embodiment can omit the first part in Embodiment Fifteen, and still includes a second part c 141  and a third part c 142 , and the second part c 141 , the third part c 142  and the protrusion c 140   d  are connected with each other via a crossed coupling. It should be noted that, the second part c 141  of the coupling is only configured to provide more directions of sliding between the driving component and the hub, in order to simplify the technical solution of the present embodiment, the second part c 141  can be omitted. 
     As shown in  FIG. 114 , a supporting cap c 146  is further provided between the coupling and the hub c 148 , the supporting cap c 146  is configured to support the third part c 142 , it is also possible to configure the supporting cap c 146  and the third part c 142  as a whole, preferably in the present embodiment, they are separately configured, so as to facilitate installation of the spring in the ratchet mechanism. A spring c 147  which is the same with Embodiment Fifteen is provided between the supporting cap c 146  and the hub c 148 . The end portion of the supporting cap c 146  is fixed on the exterior of the hub through an E shaped latching spring. 
     As shown in  FIG. 114 ,  FIG. 116 ,  FIG. 117  and  FIG. 118 , in the present embodiment, the hub c 148  is fixedly connected with the photosensitive member, the protrusion c 140   d  at the end portion of the driving component c 140  is configured as a part of the coupling, thus the driving component c 140  cannot rotate about the coupling, but can unidirectionally rotate about the hub through the coupling, so that it is possible to control the driving component to unidirectionally rotate about the hub; since the hub is fixedly connected to the photosensitive drum, the driving component c 140  can unidirectionally rotate about the photosensitive drum. Preferably, in the present embodiment, the ratchet mechanism controls the coupling to unidirectionally rotate about the hub; specifically, the ratchet mechanism includes a spring c 145  provided in the sliding groove c 142   c  at the end portion of the third part c 142 , blocking members c 143  and c 144  which respectively rotate about the inner arcs c 142   b  and c 142   d  of the third part c 142 , one end of the blocking members c 143  and c 144  is provided with a cambered surface corresponding to the arcs c 142   b  and c 142   d , the other end is provided with a plane abutting the hub c 148 . As shown in  FIG. 117 , the spring c 145  makes at least a portion of the blocking members c 143  and c 144  be located outside the third part c 142 . As shown in FIG.  118 , the hub c 148  includes an accommodating portion c 148   a  which accommodates the coupling and a gear c 148   d ; grooves which are symmetrically arranged on the inner wall of the hub c 148 , the groove includes a first plane c 148   b  parallel to the axis of the hub, and a cambered surface c 148   c  arranged opposite to the first plane c 148   b . In this way, after the driving assembly is assembled, the plane of the end portion of the blocking members c 143  and c 144  is located in the groove of the hub c 148 , when the coupling rotates along direction cC in  FIG. 118 , the plane of the end portion of the blocking members c 143  and c 144  abuts the first plane c 148   b  of the groove in the hub, thus the rotation of the coupling part along direction cC is blocked; when the coupling rotates along direction cD in  FIG. 118 , the cambered surface c 148   c  in the hub will press the blocking members c 143  and c 144 , the blocking members further press the spring c 145 ; thus the coupling can unidirectionally rotate in the hub c 148 . 
     It should be noted that, the self-adaptive adjusting portion in the present embodiment can be configured same with Embodiment Fifteen; the mechanism which controls the driving component c 140  to unidirectionally rotate can also adopt the structure in Embodiment Fifteen. 
     Embodiment Seventeen 
     As shown from  FIG. 119  to  FIG. 126 , an electrophotographic image forming device is provided which includes an electrophotographic image forming device and a process cartridge which can be detachably installed into the electrophotographic image forming device; the process cartridge is preferably the process cartridge provided in Embodiment Fifteen, the electrophotographic image forming device c 1000  includes a process cartridge installing portion c 1001  to which a process cartridge can be installed; a rotational force driving head c 1002  which fits with the driving assembly in the process cartridge, the rotational force driving head c 1002  transmits force with the motor through a gear or a belt; the electrophotographic image forming device further includes a guide rail c 1003  which guides the process cartridge to be installed and a cover c 1004  which stabilizes the process cartridge to the process cartridge installing portion c 1001 . Preferably, the guide rail c 1003  includes a first stepped surface c 1003   a , a second stepped surface c 1003   b  parallel to the first stepped surface in horizontal direction, a third stepped surface c 1003   c  which is connected with the second stepped surface c 1003   b  and inclines with respect to the second stepped surface c 1003   b , and the size of the third stepped surface c 1003   c  in the axial direction of the photosensitive drum in the process cartridge gradually increases along the installation direction of the process cartridge; an arc portion c 1003   d  is further provided on the guide rail c 1003 , after the process cartridge is completely installed into the electrophotographic image forming device, the front end of the process cartridge abuts the arc portion c 1003   d . Preferably, the rotational force driving head c 1002  includes a driving rod c 1002   d , a tapered ball head c 1002   a  which is provided on the front end of the driving rod c 1002   d , and transmitting pins c 1002   b  and c 1002   c  provided at two sides of the driving rod c 1002   d.    
     Preferably, the driving assembly in the process cartridge of the present embodiment is the driving assembly c 4  described in Embodiment Sixteen. 
     As shown in  FIG. 122  and  FIG. 123 , which are schematic structural diagrams showing that the process cartridge c 1  is installed into the electrophotographic image forming device in the first state; it is assumed that the driving assembly c 4  does not includes the self-adaptive adjusting portion, the engaging claws c 40   c  or engaging claws c 40   d  of the driving component c 40  are located at the front in the axial direction of the driving component c 40  in the installation direction of the process cartridge, and the engaging claws c 40   c  and c 40   d  are protruded in the axial direction of the driving component, therefore, during installation process, the engaging claw c 40   c  or c 40   d  will interfere the tapered ball head c 1002   a  at the front end of the driving component c 1002 , which will affect the installation of the process cartridge c 1 . Therefore, preferably, the driving component c 40  of the present embodiment is provided with two extending portion c 40   a  and c 40   b  as the self-adaptive adjusting portion, which will make, during the installation process of the process cartridge, the engaging claws c 40   c  and c 40   d  automatically adjust to the position that will not interfere with the tapered ball head c 1002   a , through the collision of the extending portion c 40   a  or c 40   b  with the third stepped surface c 1003   c  on the guide rail. 
     As shown in  FIG. 124  and  FIG. 125 , which are schematic structural diagrams showing that the process cartridge c 1  is installed into the electrophotographic image forming device in the second state; in this state, the extending portions c 40   a  or c 40   b  are located at the front in the axial direction of the driving component c 40  in the installation direction of the process cartridge; thus the engaging claws c 40   c  and c 40   d  will not interfere with the tapered ball head c 1002   a , then the extending portions c 40   a  and c 40   b  as the self-adaptive adjusting portion do not need to adjust the state of the driving component c 40  through the guide rail. As described in Embodiment Sixteen in detail, a mechanism is further provided in the driving assembly between the coupling and the driving component c 40 , configured to control the driving component c 40  to unidirectionally rotate, preferably, the driving component c 40  can unidirectionally rotate along the clockwise direction shown in  FIG. 123 ; therefore the driving component c 40  will not rotate optionally during installation, which facilitates the engaging claws c 40   a  and c 40   b  on the driving component c 40  rotating according to preset track. 
     As shown in  FIG. 126 , which is a schematic structural diagram showing that the process cartridge is completely installed into the electrophotographic image forming device c 1000 , at this time the driving component c 40  in the driving assembly c 4  engages with the rotational force driving head c 1002 , specifically, the engaging claws c 40   c  and c 40   d  on the driving component c 40  respectively engage with the transmitting pins c 1002   b  and c 1002   c  on the rotational force driving head c 1002 . 
     Preferably, the crossed coupling provided in the driving assembly c 4  is to provide a cushioning process for the detaching of the driving component c 40  from the rotational force driving head c 1002  during taking the process cartridge c 1  out of the electrophotographic image forming device, which is later than the process cartridge frame disengaging from abutting the guide rail, which facilitates the disengagement of the driving component c 40 . Furthermore, the sliding surface between the groove c 43   e  and the protrusion c 42   a  inclines with respect to the axis of the driving component for a certain extent, thus during axial shift of the driving component c 40 , it is possible to achieve a larger distance of travel, which facilitates the disengagement of the driving component c 40  from the rotational force driving head c 1002  in the electrophotographic image forming device. 
     Embodiment Eighteen 
     As shown in  FIG. 127  and  FIG. 128 , which are local schematic diagrams of another electrophotographic image forming device, Embodiment Eighteen includes the same electrophotographic image forming device c 100  and same process cartridge frame with Embodiment Seventeen; the difference lies in that the driving assembly in the process cartridge provided by the present embodiment is the driving assembly in Embodiment Sixteen; specifically, the self-adaptive adjusting portion is a protruded tooth c 140   b  provided on the lateral wall of the driving component c 140 , the protruded tooth c 140   b  can also adjust the state of the engaging claw with the stepped surface c 1003   c  on the guide rail c 1003 ; and the driving assembly is also provided with a ratchet mechanism for adjusting the driving component to unidirectionally rotate. After the process cartridge is completely installed to the electrophotographic image forming device, the engaging claw c 104   a  at the end portion of the driving assembly c 4  can well engage with the transmitting pin on the rotational force driving head c 1002 .