Patent Publication Number: US-2023144789-A1

Title: Developer supply container and developer supplying system

Description:
TECHNICAL FIELD 
     The present invention relates to a developer supply container dismountably mountable to a developer receiving apparatus and a developer supplying system. 
     BACKGROUND ART 
     Conventionally, in electrophotographic image forming apparatuses such as copying machines, fine developing powder such as toner has been used. In such an image forming apparatus, the developer consumed by the image formation is supplemented from a developer supply container. 
     For example, a structure has been proposed in which the developer supply container is mountable to and dismountable from a developer receiving apparatus provided in the image forming apparatus, and the developer receiving portion of the developer receiving apparatus is displaced toward the discharge opening of the developer supply container in accordance with the mounting operation of the developer supply container (JP2013-015826A). 
     SUMMARY OF THE INVENTION 
     Problems to be Solved by Invention 
     It is an object of the present invention to provide a structure further improved in the structure described in the above-mentioned Japanese Patent Application Laid-open No. 2013-015826. 
     Means for Solving the Problem 
     According to one aspect of the present invention, there is provided a developer supply container detachably mountable to a developer receiving apparatus, said developer receiving apparatus including a developer receiving portion provided with a receiving port for receiving a developer and including a portion-to-be-engaged capable of displacing integrally with said developer receiving portion, said developer supply container comprising a rotatable developer accommodating portion for accommodating the developer; a developer discharging portion which is rotatable relative to said developer accommodating portion and which is provided at a bottom side thereof with a discharge opening for discharging the developer accommodated in said developer accommodating portion; and an engaging portion provided only on one side of said developer discharging portion as seen in a direction in which said developer supply container is inserted into the developer receiving apparatus, said engaging portion is engageable with the portion-to-be-engaged with a mounting operation of said developer supply container to displace the developer receiving portion to move said developer receiving portion toward said discharge opening, thereby to bring the receiving port into fluid communication with said discharge opening. 
     Effect of the Invention 
     According to the present invention, a further improved structure can be provided. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    shows a schematic structure diagram of an image forming apparatus according to an Embodiment. 
         FIG.  2    is a perspective view of the image forming apparatus according to the Embodiment. 
       Parts (a) and (b) of  FIG.  3    show a developer receiving apparatus according to the Embodiment, in which part (a) is a perspective view thereof, and part (b) is a cross-sectional view thereof. 
       Parts (a), (b) and (c) of  FIG.  4    show a developer receiving apparatus according to the Embodiment, in which part (a) is an enlarged partial perspective view thereof, part (b) is an enlarged cross sectional view thereof, and part (c) is a perspective view of a developer receiving portion. 
       Parts (a), (b) and (c) of  FIG.  5    show a developer supply container according to the Embodiment, in which part (a) is a partially cut-away perspective view, part (b) is a cross-sectional view thereof around a flange portion, and (c) is a front elevational view thereof as viewed from a front side. 
         FIG.  6    is a perspective view of the container main body of the developer supply container according to the Embodiment. 
       Parts (a) and (b) of  FIG.  7    show a flange portion in the Embodiment, in which part (a) is a perspective view thereof, and (b) is a bottom view thereof. 
         FIG.  8    is a perspective view of the flange portion according to the embodiment as viewed from the side opposite to that of part (a) of  FIG.  7   . 
       Part (a)  FIG.  9    and part (b) of  FIG.  9    are top views of the shutter according to the embodiment, and part (b) of  FIG.  14    is a perspective view. 
       Part (a) of  FIG.  10    is a perspective view of the shutter according to the embodiment as viewed from the opposite side of that in part (b) of  FIG.  9   , and part (b) of  FIG.  10    is a sectional view taken along line C-C of part (b) of  FIG.  9   . 
       Parts (a) and (b) of  FIG.  11    show the pump according to Embodiment 1, in which part (a) is a perspective view, and part (b) is a side view. 
       Parts (a) and (b) of  FIG.  12    show the reciprocating member according to Embodiment  1 , in which part (a) is a perspective view, part (b) is a perspective view as viewed from the opposite side of part (a). 
       Parts (a) and (b) of  FIG.  13    show the cover according to Embodiment 1, in which part (a) is a perspective view, part (b) is a perspective view as viewed from the opposite side of (a). 
       Part (a) of  FIG.  14    is a sectional view of the developer supply container and the developer receiving device according to the embodiment in a state in which the shutter is fixed to the developer receiving device, and part (b) of  FIG.  14    is a cross-sectional view showing the position of the engaging portion at that time. 
       Part (a) of  FIG.  15    is a cross-sectional view of the developer supply container and the developer receiving device according to the embodiment in a state in which the engaged portion of the developer receiving portion has started to engage with the engaging portion of the flange portion, and part (b) of  FIG.  15    is a view illustrating the position of the engaging portion at that time. 
       Part (a) of  FIG.  16    is a sectional view of the developer supply container and the developer receiving device according to the embodiment while the engaged portion of the developer receiving portion is in engagement with the engaging portion of the flange portion and is moving, and part (b) of  FIG.  16    shows the position of the engaging portion at that time. 
       Part (a) of  FIG.  17    is a cross-sectional view of the developer supply container and the developer receiving device in a state where mounting of the developer supply container according to the embodiment is completed, and part (b) of  FIG.  17    is a sectional view of the engagement portion at that time. 
         FIG.  18    is a cross-sectional view of the developer supply container and the developer receiving apparatus in a state in which the mounting of the developer supply container according to the embodiment is completed. 
         FIG.  19    is a sectional view of the shutter and the developer receiving portion. 
       Parts (a), (b) and (c) of  FIG.  20    show modifications of the flange portion according to the embodiment, in which (a) is a side view of a first example, (b) is a side view of a second example, and (c) is a side view of a third example. 
         FIG.  21    is a cross-sectional view of a connecting portion between the shutter and the developer receiving portion according to a comparative example. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     In the following, referring to  FIGS.  1 - 20   , Embodiment 1 of the present invention will be described. First, referring to  FIG.  1    and  FIG.  2   , a schematic structure of the image forming apparatus of this embodiment will be described. 
     [Image Forming Apparatus] 
     In  FIG.  1   , the image forming apparatus  100  includes an original reading device  103  at a top of a main assembly  100   a  of the image forming apparatus. An original  101  is placed on an original platen glass  102 . A light image corresponding to image information of the original  101  is imaged, using a plurality of mirrors M and the lens Ln of the original reading device  103 , on a photosensitive drum  104  which is a cylindrical photosensitive member as an image bearing member to form an electrostatic latent image. This electrostatic latent image is visualized using toner (one component magnetic toner) as a developer (dry powder) by a dry type developing device (one-component developing device)  201 . Here, in this embodiment, a one-component magnetic toner is used as the developer to be supplied from the developer supply container  1  (also referred to as a toner cartridge), but the present invention is not limited to such an example, and it may be of a structure as will be described hereinafter. 
     More specifically, in the case of using a one-component developing device which performs developing operation with one component nonmagnetic toner, one component nonmagnetic toner is supplied as a developer. In addition, non-magnetic toner is supplied as the developer when using a two-component developer which develops the image using a two component developer prepared by mixing magnetic carrier and nonmagnetic toner. In this case, as the developer, a structure may be employed in which the magnetic carrier is also supplied together with the non-magnetic toner. 
     As described above, a developing device  201  shown in  FIG.  1    develops the electrostatic latent image formed on the photosensitive drum  104  using the toner as the developer based on the image information of the original  101 . In addition, a developer supplying system  200  is connected to developing device  201 , and the developer supplying system  200  includes a developer supply container  1  and a developer receiving apparatus  8  relative to which the developer supply container  1  is mountable and dismountable. Developer supplying system  200  will be described hereinafter. 
     The developing device  201  includes a developer hopper portion  201   a  and a developing roller  201   f.  In this developer hopper portion  201   a,  a stirring member  201   c  for stirring the developer supplied from the developer supply container  1  is provided. The developer stirred by the stirring member  201   c  is fed to a feeding member ( 201   e ) side by a feeding member  201   d.  And, the developer which has been sequentially fed by the feeding members  201   e  and  201   b  is carried on the developing roller  201   f  and finally supplied to a developing zone where it is opposed to the photosensitive drum  104 . In this embodiment, a one-component developer is used, and therefore, toner as a developer from the developer supply container  1  is supplied to the developing device  201 , but when using a two component developer, toner and carrier as a developer may be supplied from the developer supply container. 
     Cassettes  105  to  108  contain recording materials S such as sheets of paper. When an image is to be formed, a cassette containing an optimum recording material S among the sheets contained in these cassettes  105  to  108  is selected on the basis of the information inputted by the operator (user) on the operation portion  100   d  of the image forming apparatus  100  or on the basis of the size of the original  101 . Here, as for the recording material S, it is not limited to sheets of paper, but it may be an OHP sheet or the like as the case may be. One sheet of recording material S fed by the feeding and separating devices  105 A to  108 A is fed to registration rollers  110  by way of a feeding portion  109 . Then, the recording material S is fed in synchronization with the rotation of the photosensitive drum  104  and the scan timing of the original reading device  103 . 
     A transfer charging device  111  and a separation charging device  112  are provided at positions opposing the photosensitive drum  104  on a downstream side of the registration roller  110  in the recording material feeding direction. 
     The image of the developer (toner image) formed on the photosensitive drum  104  is transferred onto the recording material S fed by the registration roller  110 , by a transfer charging device  111 . And, the recording material S onto which the toner image is transferred is separated from the photosensitive drum  104  by a separation charging device  112 . Subsequently, heat and pressure are applied to the recording material S fed by the feeding portion  113  in a fixing portion  114 , so that the toner image is fixed on the recording material. Thereafter, the recording material S to which the toner image is fixed passes through a discharge/reversing portion  115  and is discharged to the discharge tray  117  by the discharge roller  116 , in case of single-sided copy. 
     On the other hand, in case of double-sided copy, the recording material S passes through the discharge/reversing portion  115 , and the recording material S is partly discharged to the outside of the apparatus once by the discharge roller  116 . After this, at the timing when a trailing end of the recording material S passes through the switching member  118  and is still nipped by the discharge rollers  116 , the position of the switching member  118  is switched, and the discharge roller  116  is rotated counterclockwise, by which the recording material S is fed again into the apparatus. Thereafter, the recording material S is fed to the registration roller  110  by way of the re-feeding and feeding portions  119  and  120 , and is discharged to the discharge tray  117  by way of the same path as in the case of single-sided copying. 
     In the image forming apparatus  100  having the above-described structure, image forming process devices such as a developing device  201 , a cleaner portion  202 , a primary charging device  203  and the like are provided around the photosensitive drum  104 . Here, the developing device  201  supplies the developer to the electrostatic latent image formed on the photosensitive drum  104  on the basis of the image information of the original  101  read by the original reading device  103  so as to develop the electrostatic latent image. In addition, the primary charging device  203  uniformly charges the surface of the photosensitive drum to form a desired electrostatic latent image on the photosensitive drum  104 . Furthermore, the cleaner portion  202  has a function of removing the developer remaining on the photosensitive drum  104 . 
     As shown in  FIG.  2   , when the operator opens a replacement cover  40  which is a portion of an outer cover of the apparatus main assembly  100   a  of the image forming apparatus  100 , a part of the developer receiving apparatus  8  which will be described hereinafter can be seen. And, by inserting the developer supply container  1  into this developer receiving apparatus  8 , the developer supply container  1  is mounted in a state where it can supply the developer to the developer receiving apparatus  8 . On the other hand, when the operator exchanges the developer supply container  1 , it carries out the operation opposite to the loading operation, by which the developer supply container  1  is dismounted from the developer receiving apparatus  8 , and thereafter a new developer supply container  1  can be mounted. Here, the replacement cover  40  is a cover exclusively for mounting/dismounting (exchanging) the developer supply container  1 , and is opened and closed only for dismounting/mounting the developer supply container  1 . On the other hand, the maintenance operation for the image forming apparatus  100  is performed by opening/closing a front cover  100   c.  Here, the replacement cover  40  and the front cover  100   c  may be integrated. In such a case, the replacement of the developer supply container  1  and the maintenance of the image forming apparatus  100  are performed by opening and closing the integrated cover (not shown). 
     [Developer Receiving Apparatus] 
     Next, referring to part (a) of  FIG.  3    to part (c) of  FIG.  4   , the developer receiving apparatus  8  constituting the developer supplying system  200  will be described. As shown in part (a) of  FIG.  3   , the developer receiving apparatus  8  is provided with a mounting portion (mounting space)  8   f  to which the developer supply container  1  is dismountably mounted. The mounting portion  8   f  is provided with an insertion guide  8   e  for guiding the developer supply container  1  in the mounting and dismounting directions. In the case of this embodiment, the structure is such that the mounting direction of the developer supply container  1  is the direction indicated by A, and the dismounting direction B of the developer supply container  1  is opposite to the direction A of mounting the developer supply container  1 , by the insertion guide  8   e.    
     As shown in part (a) of  FIG.  3    to part (a) of  FIG.  4   , the developer receiving apparatus  8  has a drive gear  9  which functions as a driving mechanism for driving the developer supply container  1 . A rotational driving force is transmitted to the actuating gear  9  from a driving motor  500  by way of a driving gear train (not shown), so that the actuating gear  9  applies the rotational driving force to the developer supply container  1  mounted in the mounting portion  8   f . The operation of the driving motor  500  is controlled by the control device  600 . 
     In addition to controlling the driving motor  500 , the control device  600  controls overall of the image forming apparatus  100 . The control device  600  has a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The CPU controls each portion while reading the program corresponding to a control procedure stored in the ROM. In addition, working data and an input data are stored in the RAM, and the CPU executes control while looking up the data stored in the RAM on the basis of the program etc. 
     In the mounting portion  8   f  of the developer receiving apparatus  8 , there is provided a developer receiving portion  11  for receiving the developer discharged out of the developer supply container  1 . The developer receiving portion  11  is connected to a container discharge opening  3   a   4  (part (b) of  FIG.  5   ) of the developer supply container  1  when the developer supply container  1  is mounted, and has a receiving opening  11   a  for receiving the developer discharged through the container discharge opening  3   a   4 . The developer receiving portion  11  is mounted so as to be movable (displaceable) in the direction in which the receiving opening  11   a  moves toward and away from the container discharge opening  3   a   4  (in this embodiment, the direction crossing with the direction in which the developer supply container  1  is mounted (more specifically, vertical direction relative to the developer receiving apparatus  8 )). In the case of this embodiment, as shown in part (b) of  FIG.  3   , the developer receiving portion  11  is urged by an urging member (spring)  12  in a direction in which the receiving opening  11   a  moves away from the container discharge opening  3   a   4  (vertically downward). Therefore, when the receiving opening  11   a  moves toward the container discharge opening  3   a   4  (upward in the vertical direction), the developer receiving portion  11  moves against the urging force of the urging member  12 . 
     In addition, as shown in part (a) of  FIG.  4   , a first shutter stopper portion  8   a  and a second shutter stopper portion  8   b  are provided on the mounting portion  8   f  of the developer receiving apparatus  8  in the upstream side, in the mounting direction (direction of arrow A), of the developer receiving portion  11 . In the developer supply container  1  which is moving relative to the developer receiving apparatus  8  during mounting and dismounting, the first and second shutter stopper portions  8   a  and  8   b  restrict relative movement of the shutter  4  only (part (a) of  FIG.  9    and the like) with respect to the developer receiving apparatus  8 , which will be described later. In this case, the shutter  4  moves relative to a portion of the developer supply container  1  other than the shutter  4 , such as the container body  2  and the like which will be described later. 
     As shown in part (b) of  FIG.  3    and part (b) of  FIG.  4   , below the developer receiving apparatus  8  in the vertical direction, a sub hopper  8   c  for temporarily storing the developer supplied from the developer supply container  1  is provided. In this sub hopper  8   c,  a feeding screw  14  for feeding the developer to a developer hopper portion  201   a  ( FIG.  1   ) which is a portion of the developing device  201 , and an opening  8   d  communicating with the developer hopper portion  201   a  are provided. 
     As shown in part (c) of  FIG.  4   , a main assembly seal  13  formed so as to surround the receiving opening  11   a  is provided in the developer receiving portion  11 . The main assembly seal  13  comprises an elastic member, foam and so on. With the developer supply container  1  mounted, the main assembly seal  13  and an opening seal  3   a   5  (part (b) of  FIG.  5   ) surrounding the container discharge opening  3   a   4  of the developer supply container  1  sandwich the shutter  4  (parts (a) and (b) of  FIG.  9   ) in close contact therewith. By this, the developer discharged from the container discharge opening  3   a   4  of the developer supply container  1  through the shutter opening  4   j  (discharge port) of the shutter  4  to the receiving opening  11   a  is prevented from leaking out of the receiving opening  11   a  (developer feed path). 
     Here, it is desirable that a diameter of the receiving opening  11   a  is substantially the same as or slightly larger than a diameter of the shutter opening  4   j  of the shutter  4 , in order to prevent the interior of the mounting portion  8   f  from being contaminated by the developer. This is because if the diameter of the receiving opening  11   a  is smaller than the diameter of the shutter opening  4   j,  the developer discharged from the shutter opening  4   j  is more likely to be deposited on the upper surface of the main assembly seal  13 . If the developer is deposited on the lower surface of the developer supply container  1  at the time of mounting/dismounting operation of the developer supply container  1 , it becomes a cause of contamination by the developer. In view of this point, it is preferable that the diameter of the receiving opening  11   a  is roughly the same as or about 2 mm larger than the diameter of the shutter opening  4   j.  For example, in the case that the diameter of the shutter opening  4   j  of the shutter  4  is a fine hole (pinhole) of about 2 mm in diameter, it is preferable that the diameter of the receiving opening  11   a  is about 3 mm. 
     In addition, as shown in part (c) of  FIG.  4   , on the side surface of the developer receiving portion  11 , an engaged portion (portion to be engaged)  11   b  projecting toward the center side is provided. In the case of this embodiment, the engaged portion  11   b  is directly engaged with the engaging portion  30  (part (a) in  FIG.  7   ) provided in the developer supply container  1  which will be described hereinafter, and is guided by the engaging portion  30 , by which the developer receiving portion  11  is lifted toward the developer supply container  1  in the upward direction. 
     [Developer Supply Container] 
     Next, referring to part (a)  FIG.  5    to part (b) of  FIG.  12   , the developer supply container  1  constituting the developer supplying system  200  will be described. First, referring to part (a) of  FIG.  5    and part (b) of  FIG.  5   , the overall structure of the developer supply container  1  will be described. The developer supply container  1  mainly includes the container body  2 , a flange portion  3 , the shutter  4 , a pump portion  5 , a reciprocating member  6 , and a cover  7 . The developer supply container  1  supplies the developer to the developer receiving apparatus  8  by rotating in the developer receiving apparatus  8  in the direction indicated by an arrow R about the rotation axis P shown in part (a) of  FIG.  5   . In the following, each element constituting the developer supply container  1  will be described in detail. 
     [Container Body] 
     As shown in  FIG.  6   , the container body  2  mainly comprises a developer accommodating portion  2   c  for containing the developer. In addition, the container body  2  is provided with a helical feeding groove  2   a  (feeding portion) for feeding the developer in the developer accommodating portion  2   c  by rotating the container body  2  in the direction of the arrow R around the rotation axis P. In addition, as shown in  FIG.  6   , a cam groove  2   b  and a drive receiving portion  2   d  for receiving a driving force from the main assembly side are integrally formed over the entire periphery of the outer circumferential surface of the container body  2  on one end side. Here, in this embodiment, the cam groove  2   b  and the drive receiving portion (gear)  2   d  are integrally formed with the container body  2 , but the cam groove  2   b  or the drive receiving portion  2   d  may be formed as a separate member and may be integrally mounted to the container body  2 . In addition, in this embodiment, for example, a toner including a volume average particle diameter of 5 μm to 6 μm is accommodated in the developer accommodating portion  2   c  as the developer. In addition, in this embodiment, the developer accommodating portion  2   c  includes not only the container body  2  but also the interior spaces of the flange portion  3  and the pump portion  5  which will be described hereinafter. 
     [Flange Portion] 
     Referring to part (a) of  FIG.  5   , part (b) of  FIG.  5   , part (a) of  FIG.  7    through  FIG.  8   , the flange portion  3  will be described. The flange portion  3  is mounted so as to be rotatable relative to the container body  2  about the rotation axis P. And, when the developer supply container  1  is mounted to the developer receiving apparatus  8 , the flange portion  3  is held so as not to rotate in the arrow R direction relative to the mounting portion  8   f  (part (a) of  FIG.  3   ). In addition, as shown in part (b) of  FIG.  7   , a container discharge opening  3   a   4  is provided in a portion of the flange portion  3 , and an opening seal  3   a   5  is mounted to the periphery thereof. As shown in parts (a) and (b) of  FIG.  5   , the flange portion  3  is provided with the pump portion  5 , the reciprocating member  6 , the shutter  4 , and the cover  7 . 
     First, as shown in part (b) of  FIG.  5   , the pump portion  5  is threaded at one end side of the flange portion  3 , and the container body  2  is connected to the other end side with a sealing member (not shown) therebetween. In addition, a reciprocating member  6  is provided so as to sandwich the pump portion  5 , and the engaging projection  6   b  (parts (a) and (b) of  FIG.  12   ) provided on the reciprocating member  6  is engaged with the cam groove  2   b  ( FIG.  6   ). The flange portion  3  is provided with the shutter  4 . In this embodiment, the flange portion  3  and the shutter  4  constitute a discharge portion  300  for discharging the developer accommodated in the developer accommodating portion  2   c  out. In addition, the surface on which the shutter  4  is provided is the bottom side of the flange portion  3 . In addition, in order to improve the outer appearance and to protect the reciprocating member  6  and the pump portion  5 , a cover  7  is integrally provided so as to cover the flange portion  3 , the pump portion  5 , and the reciprocating member  6  as a whole, as shown in part (b) of  FIG.  5   . 
     [Engaging Portion] 
     The flange portion  3 , as shown in part (a) of  FIG.  7   , is provided with an engaging portion  30  engageable with the engaged portion  11   b  (part (c) of  FIG.  4   ) of the developer receiving portion  11 . The engaging portion  30  displaces the developer receiving portion  11  toward the developer supply container  1  according to the mounting operation of the developer supply container  1  and connects them to each other, so that it becomes possible to replenish the developer from the developer supply container  1  to the developer receiving portion  11 . In addition, along with the removal operation of the developer supply container  1 , the engaging portion  30  performs guiding such that the developer receiving portion  11  is displaced in a direction away from the developer supply container  1 , by which the connection state between the developer supply container  1  and the developer receiving portion  11  is ceased. 
     The engaging portion  30  has a first engaging surface  3   b   2  on the downstream side in the mounting direction of the developer supply container  1  and a second engaging surface  3   b   4  formed so as to be continuous with the upstream side of the first engaging surface  3   b   2 . Part (c) of  FIG.  5    is a front view of the developer supply container  1 . As shown in part (c) of  FIG.  5   , the first engaging surface  3   b   2  and the second engaging surface  3   b   4  are disposed below the plane H including the rotation axis P. Furthermore, the plane H including the rotation axis P is a horizontal plane, and the first engaging surface  3   b   2  and the second engaging surface  3   b   4  are disposed below this horizontal plane. The developer receiving portion  11  is guided upward by engaging the engaged portion  11   b  with the first engaging surface  3   b   2  in accordance with the mounting operation of the developer supply container  1 . By this, the receiving opening  11   a  communicates with the container discharge opening  3   a   4  by the engaged portion  11   b  engaging with the second engaging surface  3   b   4 . Although details will be described hereinafter, the engaging portion of this embodiment has the following structure. The inclined portion (first portion)  3   b   2  and the parallel portion (second portion)  3   b   4  extending from the lower end (the first position) toward the upper end (the second position) constitute the tracks where the engaged portion  11   b  passes. And, as shown in part (c) of  FIG.  5   , the track is arranged below the plane H. Also, when the plane including the rotation axis is imagined, the discharge opening and the track are provided in the same region (lower region). In such a case, the parallel portion  32  is disposed at a position closer to the horizontal plane H or the imaginary plane than the inclined portion  31 . Also, in this embodiment, in the developer receiving portion  11 , the engaged portion  11   b  and the receiving opening are on the same plane perpendicular to the rotation axis P. As a result, the engaged portion  11   b  and the parallel portion  32  are on the same plane perpendicular to the rotation axis P. 
     The engaged portion  11   b  is engaged with this track, and the engaged portion  11   b  is lifted so that the discharge opening and the receiving opening can communicate with each other. And, when the communication path is formed, a discharge path is formed between the inside of the developer supply container and the discharge opening so that the developer in the developer supply container can be discharged toward the receiving port. In the following, more detailed explanation will be made. 
     The first engaging surface  3   b   2  displaces the developer receiving portion  11  in a direction crossing with the mounting direction of the developer supply container  1  so that the opening operation of the developer receiving portion  11  is performed. In this embodiment, the first engaging surface  3   b   2  displaces the developer receiving portion  11  toward the developer supply container  1  in accordance with the mounting operation of the developer supply container  1  so that the developer receiving portion  11  is connected to a part of the opening seal  3   a   5  of the developer supply container  1 . In order to accomplish this, the first engaging surface  3   b   2  extends in a direction crossing with the mounting direction of the developer supply container  1 . More specifically, the first engaging surface  3   b   2  is an inclined surface which is inclined such that the engaged portion  11   b  is guided in a direction in which the receiving opening  11   a  of the developer receiving portion  11  communicates with the container discharge opening  3   a   4  in accordance with the mounting operation of the developer supply container  1 . In this embodiment, the first engaging surface  3   b   2  is inclined so as to face upward such that as it goes from the downstream side to the upstream side in the mounting direction of the developer supply container  1 . 
     In addition, the first engaging surface  3   b   2  has such a shape that as it approaches to the drive receiving portion  2   d,  it extends upward on the axis of rotation P. Here, in this embodiment, the first engaging surface  3   b   2  has a linear shape. It is desirable that the angle of inclination of the first engaging surface  3   b   2  with respect to the mounting and dismounting direction of the developer supply container  1  is 10 to 50 degrees. In this embodiment, this inclination angle is about 40 degrees. 
     Here, the first engaging surface  3   b   2  is not limited to this structure as long as it extends upward as approaching toward the drive receiving portion  2   d . For example, as shown in part (a) of  FIG.  20   , the shape of a first engaging surface  3   b   2 A may be a curved inclined surface. Furthermore, as shown in part (b) of  FIG.  20   , the shape of the first engaging surface  3   b   2 B may be a stepped shape including a parallel surface and an inclined surface. In addition, as shown in part (c) of  FIG.  20   , the first engaging surface  3   b   2 C and the second engaging surface  3   b   4  may be integrated to form a uniform linear inclined surface. 
     On the other hand, the second engaging surface  3   b   4  maintains the position of the developer receiving portion  11  so that the container discharge opening  3   a   4  is brought into a state of communicating with the receiving opening  11   a  of the developer receiving portion  11 , in accordance with the mounting operation of the developer supply container  1 . That is, while the developer supply container  1  is moving relative to the shutter  4  after the developer receiving portion  11  is connected to a part of the opening seal  3   a   5  of the developer supply container  1 , the connection state between the main assembly seal  13  and the opening seal  3   a   5  is maintained. In other words, while the receiving opening  11   a  is connected to a part of the opening seal  3   a   5  and then is moved to the container discharge opening  3   a   4 , the state in which the main assembly seal  13  and the opening seal  3   a   5  are connected with each other is maintained and the receiving opening  11   a,  and the receiving opening  11   a  communicates with the container discharge opening  3   a   4 . To achieve this, the second engaging surface  3   b   4  extends in a direction parallel to the mounting direction of the developer supply container  1 . More specifically, the second engaging surface  3   b   4  is a substantially horizontal surface. In this embodiment, the engaging portion (the second engaging surface  3   b   4 ) engaged with the engaged portion  11   b  is substantially parallel to the mounting direction or the rotation axis P, but the engaging portion corresponding to the second engaging surface  3   b   4  of this embodiment is not limited to be parallel, and it may be inclinded. 
     Furthermore, in this embodiment, as shown in part (a) of  FIG.  7   , the engaging portion  30  is provided only on one side surface of the flange portion  3  in a predetermined direction which intersects the mounting direction of the developer supply container  1  and crosses with the displacing direction of the developer receiving portion  11 . In this embodiment, this predetermined direction is a direction perpendicular to the mounting direction (arrow A direction) of the developer supply container  1  and perpendicular to the displacing direction (vertical direction) of the developer receiving portion  11 , it is the leftright direction as viewed in the direction of the arrow D shown in  FIG.  8   . 
     And, the engaging portion  30  is provided only on one side surface of both side surfaces in the predetermined direction of the flange portion  3 . Therefore, as shown in  FIG.  8   , the engaging portion  30  is not provided on the other side surface of the flange portion  3  in the predetermined direction. Here, in the flange portion  3  of this embodiment, although the engaging portion  30  is not provided on the side surface on the left side as viewed in the direction of the arrow D in  FIG.  8   , it may be reversed. 
     [Shutter] 
     Next, referring to part (a)  FIG.  9    through part (b) of  FIG.  9   , the shutter  4  will be described. The shutter  4  slidable on the shutter insertion portion  3   b   1  (part (a) of  FIG.  7   ) of the flange portion  3  move relative to a portion (flange portion  3 ) of the developer supply container  1 . The shutter  4  has a shutter opening  4   j  as a discharge opening, and opens and closes the container discharge opening  3   a   4  (part (b) in  FIG.  7   ) of the developer supply container  1  in accordance with the mounting and dismounting operation of the developer supply container  1 . That is, by moving the shutter  4  relative to the developer supply container  1  in accordance with the mounting operation of the developer supply container  1 , the receiving opening  11   a  of the developer receiving portion  11  and the shutter opening  4   j  communicate with each other, and in addition with the container discharge opening  3   a   4 . By this, the developer in the developer supply container  1  can be discharged to the receiving opening  11   a . That is, the discharge portion  300  (part (b) of  FIG.  5   ) for discharging the developer is constituted by the flange portion  3  and the shutter  4 , and the shutter  4  of the discharge portion  300  is provided with the shutter opening  4   j  as the discharge opening for discharging the developer. 
     On the other hand, as shown in parts (a) and (b) of  FIG.  9   , a developer sealing portion  4   a  is provided at a position deviated from the shutter opening  4   j  of the shutter  4 . The developer sealing portion  4   a  closes the container discharge opening  3   a   4 , and as the shutter  4  moves relative to the developer supply container  1  in accordance with the operation of taking out the developer supply container  1 . In addition, the developer sealing portion  4   a  prevents leakage of the developer from the container discharge opening  3   a   4 , when the developer supply container  1  is not mounted to the mounting portion  8   f  (part (a) of  FIG.  3   ) of the developer receiving apparatus  8 . The back side (developer receiving portion ( 11 ) side) is provided with a sliding surface  4   i  which slides on the shutter insertion portion  3   b   1  of the flange portion  3 . Here, the shutter  4  is engaged with the flange portion  3  in an attitude in which the developer sealing portion  4   a  faces upward. 
     The shutter  4  is provided with a first stopper portion  4   b  and a second stopper portion  4   c  held by first and second shutter stopper portions  8   a  and  8   b  (part (a) of  FIG.  4   ) of the developer receiving apparatus  8  doing so that the developer supply container  1  is capable of moving relative to the shutter  4 . In addition, the shutter  4  is provided with a support portion  4   d  for displaceably supporting the first and second stopper portions  4   b  and  4   c.  The support portion  4   d  is elastically deformable and extends from one side to other side of the developer sealing portion  4   a.  And, the first stopper portion  4   b  and the second stopper portion  4   c  are provided at the free end portion of the support portion  4   d . By this, the first and second stopper portions  4   b,    4   c  can be displaced by the elasticity of the support portion  4   d.    
     Here, the first stopper portion  4   b  is inclined so that an angle α formed by the first stopper portion  4   b  and the support portion  4   d  is an acute angle. On the contrary, the second stopper portion  4   c  is inclined so that an angle β formed by the second stopper portion  4   c  and the support portion  4   d  is an obtuse angle. 
     When the developer supply container  1  is mounted, the first stopper portion  4   b  is engaged with the guide portion  8   g  of the developer receiving apparatus  8  and is displaced to pass through the second shutter stopper portion  8   b , thus engaging with the first shutter stopper portion  8   a.  By engaging the first stopper portion  4   b  and the first shutter stopper portion  8   a,  the position of the shutter  4  with respect to the developer receiving apparatus  8  is fixed, and the shutter  4  and the developer supply container  1  can move relative to each other. The second stopper portion  4   c  is engaged with the second shutter stopper portion  8   b  of the developer receiving apparatus  8  at the time of removing the developer supply container  1  so that the first stopper portion  4   b  disengages from the first shutter stopper portion  8   a.  By this, the shutter  4  is disengaged from the developer receiving apparatus  8 . 
     In addition, as shown in parts (a) and (b) of  FIG.  10   , the shutter  4  has a connecting surface  4   k  connected to the developer receiving portion  11  so as to surround the shutter opening  4   j  of the sliding surface  4   i.  Part (b) of  FIG.  10    shows a sectional view of the neighborhood of the shutter opening  4   j  of the shutter  4  (C-C cross-sectional view of part (b) of  FIG.  9   ). Here, the direction C in part (b) of  FIG.  9    is the same as the direction D in  FIG.  8   . As shown in part (b) of  FIG.  10   , the connecting surface  4   k  is an inclined surface inclined toward the developer receiving portion as going from one side to the other side in the predetermined direction (the direction of arrow E). In part (b) of  FIG.  10   , the connecting surface  4   k  is inclined downward as going from the right side to the left side. That is, as explained in part (a) of  FIG.  7    and  FIG.  8   , the connecting surface  4   k  is inclined downward as going from the side provided with the engaging portion  30  toward the side not provided with the engaging portion  30 . The shutter opening  4   j  is formed in the inclined connecting surface  4   k  as described above. 
     [Pump Portion] 
     Referring to parts (a) and (b) of  FIG.  11   , the pump portion  5  will be described. The pump portion  5  alternately and repeatedly changes the internal pressure of the developer accommodating portion  2   c,  switching between a state lower than the atmospheric pressure and a state higher than atmospheric pressure by the driving force received by the drive receiving portion  2   d  of the container body  2  ( FIG.  6   ). In this embodiment, in order to stably discharge the developer through the small container discharge opening  3   a   4  as described above, the pump portion  5  is provided at a portion of the developer supply container  1 . 
     The pump portion  5  is a displacement type pump in which a volume is changed. More specifically, the pump portion  5  employed in this embodiment has a bellows-like stretchable member capable of expanding and contracting. 
     The pressure inside the developer supply container  1  is changed by the expansion and contracting operations of the pump portion  5 , and the developer is discharged by utilizing the pressure. More specifically, when the pump portion  5  is contracted, the interior of the developer supply container  1  is brought into a compressed state, and the developer is pushed out to discharge through the container discharge opening  3   a   4  of the developer supply container  1 . In addition, when the pump portion  5  is expanded, the interior of the developer supply container  1  is brought into a reduced pressure state, and the air is taken in from the outside through the container discharge opening  3   a   4 . By air taken in, the developer in the container discharge opening  3   a   4  and in the neighborhood of the storage portion  3   a   3  (part (a) in  FIG.  7   ) that stores the developer transported from the container body  2  of the flange portion  3  is loosened and smoothly discharged. 
     That is, in the neighborhood of the container discharge opening  3   a   4  of the developer supply container  1  and the neighborhood of the storage portion  3   a   3 , the developer in the developer supply container  1  may gather due to vibrations imparted when transporting the developer supply container  1  and so on, with the possible result that the developer is caked in this portion. Therefore, as described above, the air is taken in through the container discharge opening  3   a   4 , so that it is possible to loosen the developer that has been caked. In addition, in the usual discharging operation of the developer, as air is taken in as described above, the air and the powder as the developer are mixed with the result that the flowability of the developer is enhanced, and therefore, clogging of the developer does not easily occur, as an additional advantage. By repeatedly performing the expansion and contracting operation as described above, the developer is discharged. 
     As shown in part (a) of  FIG.  11   , in the pump portion  5 , a joint portion  5   b  is provided so as to be able to be joined with the flange portion  3  on the opening end side (dismounting direction B). In this embodiment, screw threads are formed as the joint portion  5   b.  In addition, as shown in part (b) of  FIG.  11   , the pump portion  5  has a reciprocating member engaging portion  5   c  which engages with the reciprocating member  6  (parts (a) and (b) of  FIG.  12   ), which will be described hereinafter, on the other end side. 
     In addition, as shown in part (b) of  FIG.  11   , the pump portion  5  has a bellows-shaped expandable portion (bellows portion, expansion and contraction member)  5   a  in which crests and bottoms are alternately formed periodically. 
     The expansion and contraction portion  5   a  is capable by being folded in the direction of the arrow A or expanded in the direction of the arrow B along the folding lines (with folding lines as the base point). Therefore, when the bellows-like pump portion  5  as employed in this embodiment, it is possible to reduce variations in volumetric change with respect to the expansion and contraction amount, and therefore, it is possible to accomplish the stable volumetric change. 
     Here, in this embodiment, polypropylene resin is used as the material of the pump portion  5 , but the present invention is not limited to this example. As for the material (material) of the pump portion  5 , any material may be used as long as it has an expansion and contraction function and is capable of changing the internal pressure of the developer accommodating portion by changing the volume. For example, ABS (acrylonitrile-butadiene-styrene copolymer), polystyrene, polyester, polyethylene, and so on are usable. Or, rubber, other stretchable materials or the like can also be used. 
     [Reciprocating Member] 
     Referring to parts (a) and (b) of  FIG.  12   , the reciprocating member  6  will be described. As shown in parts (a) and (b) of  FIG.  12   , in order to change the volume of the pump portion  5 , the reciprocating member  6  is provided with a pump engaging portion  6   a  (part (b) of  FIG.  11   ) which engages with the reciprocating member engaging portion  5   c  provided on the pump portion (part (b) of  FIG.  10   ). In addition, the reciprocating member  6  is provided with an engaging projection  6   b  to be engaged with the above-described cam groove  2   b  ( FIG.  6   ) at the time of assembly. The engaging projection  6   b  is provided at the free end portion of the arm  6   c  extending in the mounting and dismounting direction (arrows A and B in the Figure) from the neighborhood of the pump engaging portion  6   a.  In addition, the reciprocating member  6  is regulated in rotation around the rotation axis P (part (a) of  FIG.  5   ) of the arm  6   c  by the reciprocating member holding portion  7   b  (part (b) of  FIG.  13   ) of the cover  7  which will be described hereinafter. Therefore, when the container body  2  is driven by the drive receiving portion  2   d  by the driving gear  9 , and the cam groove  2   b  rotates integrally, the reciprocating member  6  reciprocates back and forth in the directions A and B by the urging action of the engaging projection  6   b  fitted in the cam groove  2   b  and the reciprocating member holding portion  7   b  of the cover  7 . Accordingly, the pump portion  5  engaged with the pump engaging portion  6   a  of the reciprocating member  6  by way of the reciprocating member engaging portion  5   c  expands and contracts in the direction B and the direction A. 
     [Cover] 
     Referring to parts (a) and (b) of  FIG.  13   , the cover  7  will be described. As described above, the cover  7  is provided as shown in part (b) of  FIG.  5    for the purpose of improving the appearance of the developer supply container  1  and protecting the reciprocating member  6  and the pump portion  5 . 
     In more detail, the cover  7  is provided so as to cover the entirety of the flange portion  3 , the pump portion  5 , and the reciprocating member  6 . As shown in part (a) of  FIG.  13   , the cover  7  is provided with a guide groove  7   a  to be guided by the insertion guide  8   e  (part (a) of  FIG.  3   ) of the developer receiving apparatus  8 . In addition, as shown in part (b) of  FIG.  13   , the cover  7  is provided with a reciprocating member holding portion  7   b  for restricting rotation of the reciprocating member  6  about the rotation axis P (part (a) of  FIG.  5   ). 
     [Operation of Mounting Developer Supply Container] 
     Referring to parts (a) of  FIG.  17    to (b) of  FIG.  17   , an operation of mounting the developer supply container  1  to the developer receiving apparatus  8  will be described. Part (a) of  FIG.  14    to part (b) of  FIG.  17    are illustrations showing respective timings when the developer supply container  1  is mounted to the developer receiving apparatus  8 . 
     When the developer supply container  1  is inserted into the apparatus main assembly  100   a  of the image forming apparatus  100  in the direction A (part (a) of  FIG.  5   ), the shutter  4  comes into contact with the developer receiving apparatus  8  at the position shown in part (a) of  FIG.  14   , so that the position of the shutter  4  with respect to the developer receiving apparatus  8  is fixed. In this position, the positions of the developer supply container  1  and the shutter  4  are not displaced relative to each other, and therefore, the container discharge opening  3   a   4  of the flange portion  3  is sealed by the developer sealing portion  4   a  of the shutter  4 . At this time, as shown in part (b) of  FIG.  14   , the first engaging surface  3   b   2  of the engaging portion  30  provided on the one side of the flange portion  3  and the engaged portion  11   b  of the developer receiving portion  11  are not yet engaged. 
     When the developer supply container  1  is further inserted in the direction A from this state, the developer supply container  1  is displaced relative to the shutter  4  in a state in which the shutter  4  is fixed to the developer receiving apparatus  8 , as shown in part (a) of  FIG.  15   . However, as shown in part (b) of  FIG.  15   , the first engaging surface  3   b   2  of the flange portion  3  and the engaged portion  11   b  of the developer receiving portion  11  are in the beginning of engagement to each other, and therefore, the upward position of the receiving opening  11   a  remains at the initial position. 
     When the developer supply container  1  is further inserted in the direction A from this state, the developer supply container  1  is further displaced relative to the shutter  4  as shown in part (a) of  FIG.  16   . At the same time, as shown in part (b) of  FIG.  16   , the engaged portion  11   b  of the developer receiving portion  11  is displaced along the first engaging surface  3   b   2  of the flange portion  3 . By this, the developer receiving portion  11  is lifted above the initial position so that the receiving opening  11   a  comes into contact with the shutter opening  4   j  of the shutter  4 . That is, the developer receiving portion  11  rises to a position where it abuts against the shutter  4 . However, in this state, the shutter opening  4   j  and the container discharge opening  3   a   4  are not yet in communication with each other. 
     When the developer supply container  1  is further inserted in the direction A from this state, the engaged portion  11   b  of the developer receiving portion  11  is displaced in parallel along the second engaging surface  3   b   4 , as shown in part (b) of  FIG.  17   , and therefore, the receiving opening  11   a  and the shutter opening  4   j  are kept in contact with each other. Here, as shown in part (b) of  FIG.  17   , the positional relation between the container discharge opening  3   a   4  and the second engaging surface  3   b   4  is such that a plane L perpendicular to the rotation axis P and passing through the container discharge opening  3   a   4  passes through the second engaging surface  3   b   4 . In addition, the plane including the second engaging surface  3   b   4  is disposed between the rotation axis P and the container discharge opening  3   a   4 . On the other hand, as the developer supply container  1  further displaces relative to the shutter  4 , the shutter opening  4   j  and the container discharge opening  3   a   4  finally communicate with each other, as shown in part (a) of  FIG.  17   . In this state, the container discharge opening  3   a   4 , the shutter opening  4   j,  and the receiving opening  11   a  communicate with each other, so that it is possible to replenish the developer from the developer supply container  1  to the developer receiving portion  11 . 
     As shown in part (a) of  FIG.  7    and  FIG.  8   , the engaging portion  30  is provided only on one side of both sides in the predetermined direction of the flange portion  3 . For this reason, the action of lifting upward does not act on the engaged portion  11   b  of the developer receiving portion  11  on the side without the engaging portion  30  at the time of mounting operation of the developer supply container  1  described above. As a result, as shown in  FIG.  18   , the developer receiving portion  11  itself is lifted upward in an inclined state. 
     Here, as in the comparative example shown in  FIG.  19   , if the connection surface  400   k  connected to the developer receiving portion  11  of the shutter  400  is formed substantially horizontally without being inclined, there is a likelihood that a gap G is formed between the connection surface  400   k  and the main assembly seal  13  of the developer receiving portion  11 . That is, the contact between the connection surface  400   k  and the main assembly seal  13  may be insufficient. In this state, when the operation of supplying the developer from the developer supply container  1  to the developer receiving apparatus  8  is performed, a part of the developer discharged through the container discharge opening  3   a   4  and the shutter opening  400   j  may leak as indicated by an arrow F and may scatter into the developer receiving apparatus  8 . 
     On the contrary, in the case of this embodiment, as shown in part (b) of 
       FIG.  10   , the connecting surface  4   k  is inclined downward, toward the side where the engaging portion  30  of the flange portion  3  is not provided from the side where the engaging portion  30  is not provided. For this reason, as shown in  FIG.  19   , even if the developer receiving portion  11  is inclined, the connecting surface  4   k  follows the main assembly seal  13  of the developer receiving portion  11 , so that the contact can be surely made. Therefore, it is possible to supply the developer from the developer supply container  1  to the developer receiving apparatus  8  without scattering of the developer as in the comparative example. 
     Here, the inclined direction of the developer receiving portion  11  changes depending on the side surface of the flange portion  3  where the engaging portion  30  is not provided, and therefore, the inclining direction of the connecting surface  4   k  is selected correspondingly to such a side. 
     In addition, the inclination angle of the connecting surface  4   k  is selected depending on the inclination angle of the developer receiving portion  11 . As shown in  FIG.  18   , in the developer receiving portion  11 , the wall  11   c  provided with the engaged portion  11   b  is raised while being guided inside the wall  7   c  provided in the cover  7  of the developer supply container  1 . Therefore, the developer receiving portion  11  is inclined until the wall  11   c  is displaced and abuts against the wall  7   c  about the engagement position between the second engaging surface  3   b   4  and the engaged portion  11   b . For this reason, the inclination angle of the connecting surface  4   k  is made equal to the angle (θ in  FIG.  18   ) formed between the wall  11   c  and the wall  7   c  at this time. That is, the inclination angle of the connecting surface  4   k  is adjusted by the distance between the wall  7   c  and the wall  11   c.    
     Here, in the foregoing description, the connecting surface  4   k  of the shutter  4  is inclined, but the contact surface of the developer receiving portion  11  side, for example, the upper surface of the main assembly seal  13  may be inclined in accordance with the inclination angle of the developer receiving portion  11 . In addition, both the connecting surface  4   k  and the contact surface on the developer receiving portion  11  side may be inclined. 
     In addition, in the foregoing description, the shutter opening  4   j  of the shutter  4  is the discharge opening with which the receiving opening  11   a  of the developer receiving portion  11  communicates, but the receiving opening of the developer receiving portion may be brought into direct contact with the container discharge opening of the developer supply container  1  without providing the shutter. In such a case, the container discharge opening is the discharge opening communicating with the receiving opening. 
     INDUSTRIAL APPLICABILITY 
     According to the present invention, a developer supply container and a developer supply system suitable for an electrophotographic image forming apparatus and the like are provided. 
     DESCRIPTION OF SYMBOLS 
       1 =developer supply container:  2   c =developer storing portion:  3 =flange portion:  3   a   4 =container discharge opening:  3   b   2 ,  3   b   2 A,  3   b   2 B,  3   b   2 C=first engaging surface (inclinded surface):  4 =shutter:  4   j =shutter opening (discharge port):  4   k =connecting surface (inclined surface):  8 =developer receiving device:  11 =developer receiving portion:  11   a =reception opening:  11   b =engaged portion:  30 =engagement portion:  200 =developer supply system:  300 =discharge portion