Patent Publication Number: US-6701107-B2

Title: Memory member, unit, process cartridge and electrophotographic image forming apparatus

Description:
BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to a unit, a process cartridge and an electrophotographic image forming apparatus. 
     The electrophotographic image forming apparatus forms an image on a recording material through an electrophotographic image formation type process. The electrophotographic image forming apparatus may be an electrophotographic copying machine, an electrophotographic printer (an LED printer, a laser beam printer or the like), an electrophotographic printer type facsimile machine, an electrophotographic printer type word processor or the like. 
     The process cartridge is a cartridge containing as a unit an electrophotographic photosensitive member and charge means, developing means or cleaning means (process means), the unit being detachably mountable to the main assembly of the electrophotographic image forming apparatus. The process cartridge is a cartridge containing as a unit an electrophotographic photosensitive member and at least one of charge means, developing means and cleaning means (process means), the unit being detachably mountable to the main assembly of the electrophotographic image forming apparatus. The process cartridge may be a cartridge containing as a unit an electrophotographic photosensitive member and at least developing means (process means), the unit being detachably mountable to the main assembly of the electrophotographic image forming apparatus. 
     The unit is an assembly which is demountably mountable as a whole to the main assembly of the electrophotographic image forming apparatus. Examples of the unit include a fixing unit for fixing the toner image transferred onto the recording material, a developing unit for developing an electrostatic latent image formed on the electrophotographic photosensitive member, and a feeding unit for accommodating the recording material. 
     The memory member is mounted to the process cartridge or unit and stores information relating to the process cartridge or the unit. The memory member may be a FERAM, or a non-volatile memory such as a ferromagnetic memory or the like. 
     In an electrophotographic image forming apparatus using the electrophotographic image forming process, use has been made with the process cartridge type system in which the process cartridge comprises as a unit the electrophotographic photosensitive member and process means actable on the electrophotographic photosensitive member, the unit being detachably mountable to the main assembly of the electrophotographic image forming apparatus. With the use of the process cartridge type system, the maintenance operation can be carried out in effect by the users without the necessity of relying on serviceman, and therefore, the operability is improved. For this reason, it is widely used in the image forming apparatus. 
     For further easier maintenance operations for the main assembly of the image forming apparatus and for the process cartridge, the following method is used. A storing element (memory or storing means) is provided in the process cartridge, and the servicing information is stored in the storing element. When the process cartridge is mounted to the main assembly of the apparatus, a connector provided in the main assembly of the apparatus and a connector provided in the process cartridge are connected with each other. Through the connectors, the information in the storing element is taken by the main assembly of the apparatus. The main assembly of the apparatus discriminates the time of exchange of the process cartridge or the like, on the basis of the information. By doing so, the user is prompted for the maintenance operation of the process cartridge and/or the main assembly of the apparatus. 
     When the connectors are used for the electrical connection between the storing element provided in the process cartridge and the main assembly of the apparatus, the configuration of the process cartridge is complicated to permit the connector to be mounted. Therefore, the process cartridge tends to be bulky. 
     The present invention is intended to provide a further development of the above-described structure. 
     SUMMARY OF THE INVENTION 
     Accordingly, it is a principal object of the present invention to provide a unit having a memory member, a process cartridge having the memory member and an electrophotographic image forming apparatus, wherein there is provided a storing element for storing information, and the information stored in the storing element is transmitted to the main assembly of the apparatus through an antenna. 
     It is another object of the present invention to provide a unit having a memory member, a process cartridge having the memory member and an electrophotographic image forming apparatus in which there is provided a storing element for storing information, and the information stored in the storing element is transmitted to the main assembly of the apparatus without direct electric contact to the main assembly of the apparatus. 
     It is a further object of the present invention to provide a unit having a memory member, a process cartridge having the memory member and an electrophotographic image forming apparatus wherein there is provided a storing element for storing information, and the information stored in the storing element is transmitted to the main assembly of the apparatus through wireless communication. 
     It is a further object of the present invention to provide a unit having a memory member, a process cartridge having the memory member and an electrophotographic image forming apparatus in which there is provided a storing element for storing information, and in which the unit and the process cartridge is not bulky. 
     It is a further object of the present invention to provide a unit having a memory member, a process cartridge having the memory member and an electrophotographic image forming apparatus wherein there is provided a storing element for storing information, and the storing element is protected from an external load or from electrostatic disturbance. 
     According to an aspect of the present invention, there is provided a unit detachably mountable to a main assembly of an electrophotographic image forming apparatus for forming an image on a recording material, comprising: 
     (a) a unit frame; and 
     (b) a memory member supported by the unit frame, the memory member including; a base; a storing element, provided on the base, for storing information; a memory antenna, provided in the base, for sending the information stored in the storing element to a main assembly antenna provided in a main assembly of the apparatus, when the memory member is mounted to the main assembly of the apparatus; a sending member, provided in the base, for sending the information stored in the storing element to the memory antenna; and an outer casing member covering the substrate provided with the storing element, the sending member and the memory antenna, wherein the memory member is disposed substantially at a central portion of the unit frame with respect to a direction crossing with a mounting direction in which the unit is mounted to the main assembly of the apparatus. 
     According to another aspect of the present invention, there is provided a process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus for forming an image on a recording material, comprising: 
     (a) an electrophotographic photosensitive member; 
     (b) process means actable on the electrophotographic photosensitive member; 
     (c) a cartridge frame; and 
     (d) a memory member supported by the cartridge frame, the memory member including: a base; a storing element, provided on the base, for storing information; a memory antenna, provided on the base, for sending the information stored in the storing element to a main assembly antenna provided in the main assembly of the apparatus when the process cartridge is mounted to the main assembly of the apparatus; a sending member, provided in the base, for sending the information stored in the storing element to the memory antenna; and an outer casing member covering the base provided with the storing element, the sending member and the memory antenna, wherein the memory member is disposed substantially at a central portion of the cartridge frame with respect to a direction crossing with a mounting direction in which the process cartridge is mounted to the main assembly of the apparatus. 
     According to another aspect of the present invention, there is provided an electrophotographic image forming apparatus for forming an image on a recording material, to which a unit is detachably mountable, the apparatus comprising: 
     (a) a main assembly antenna; 
     (b) a unit including: a unit frame; and a memory member provided in the unit frame, the memory member having: a base; a storing element, provided on the base, for storing information; a memory antenna, provided in the base, for sending the information stored in the storing element to a main assembly antenna provided in a main assembly of the apparatus, when the unit is mounted to the main assembly of the apparatus; a sending member, provided in the base, for sending the information stored in the storing element to the memory antenna; and an outer casing member covering the base provided with the storing element, the sending member and the memory antenna, wherein the memory member is disposed substantially at a central portion of the unit frame with respect to a direction crossing with a mounting direction in which the unit is mounted to the main assembly of the apparatus; and 
     (c) feeding means for feeding the recording material. 
     According to a further aspect of the present invention, there is provided an electrophotographic image forming apparatus for forming an image on a recording material, to which a process cartridge is detachably mountable, the electrophotographic image forming apparatus comprising: 
     (a) a main assembly antenna; 
     (b) mounting means for detachably mounting the process cartridge, the process cartridge including: an electrophotographic photosensitive member; process means actable on the electrophotographic photosensitive member; a cartridge frame; and a memory member provided in the process cartridge, the memory member having: a base; a storing element, provided on the base, for storing information; a memory antenna, provided in the base, for sending the information stored in the storing element to a main assembly antenna provided in a main assembly of the apparatus, when the process cartridge is mounted to the main assembly of the apparatus; a sending member, provided in the base, for sending the information stored in the storing element to the memory antenna; and an outer casing member covering the base provided with the storing element, the sending member and the memory antenna, wherein the memory member is disposed substantially at a central portion of the cartridge frame with respect to a direction crossing with a mounting direction in which the process cartridge is mounted to the main assembly of the apparatus; and 
     (c) feeding means for feeding the recording material. 
     These and other objects, features and advantages of the present invention will become more apparent upon a consideration of the following description of the preferred embodiments of the present invention taken in conjunction with the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a sectional side elevation of an electrophotographic image forming apparatus. 
     FIG. 2 is a sectional side elevation of a process cartridge. 
     FIG. 3 is a schematic perspective view of a process cartridge. 
     FIG. 4 is a schematic perspective view of a process cartridge. 
     FIG. 5 is a perspective view of a process cartridge mounting portion provided in a main assembly of the apparatus. 
     FIG. 6 is a perspective view of a process cartridge mounting portion provided in a main assembly of the apparatus. 
     FIG. 7 is a schematic illustration of a positional relation between the memory unit and the communicating unit in a process of insertion of the process cartridge into the main assembly of the apparatus. 
     FIG. 8 is a schematic illustration of when the antenna unit of a communicating unit has been brought into contact with the memory unit. 
     FIG. 9 is an exploded perspective view of a memory unit wherein the storing element is disposed outside a communication antenna. 
     FIG. 10 is a perspective view after assembling of the memory unit shown in FIG.  9 . 
     FIG. 11 is a sectional view of a memory unit shown in FIG. 9 according to another embodiment. 
     FIG. 12 is an exploded perspective view of a memory unit in which the storing element is distributed substantially at the center portion of the communication antenna on a back side of the substrate. 
     FIG. 13 shows a memory unit, wherein (a) is a top plan view; (b) is a front view; and (c) is a bottom view. 
     FIG. 14 is a sectional view of a memory unit shown in FIG.  12 . 
     FIG. 15 shows a schematic block diagram of an electric circuit of the storing element. 
     FIG. 16 is a sectional view of a memory unit shown in FIG. 9 according to a further embodiment. 
     FIG. 17 is a sectional view of a memory unit shown in FIG. 12 according to a further embodiment of the present invention. 
     FIG. 18 is a sectional view of a memory unit provided with a beveled portion and a stepped portion. 
     FIG. 19 is a schematic, perspective illustration of a mounting portion provided in the process cartridge. 
     FIG. 20 is a schematic, perspective illustration of a feeding guide for the memory unit. 
     FIG. 21 is a schematic, perspective illustration of a feeding type of a memory unit in a parts feeder. 
     FIG. 22 is a sectional view of the parts feeder and the memory unit shown in FIG.  21 . 
     FIG. 23 is a schematic, perspective illustration of a memory unit mounting portion having a tool inserting portion according to a first embodiment of the present invention. 
     FIGS.  24 ( a ) and  24 ( b ) are a schematic, perspective and sectional views, respectively, of a memory unit mounting portion having a tool inserting portion according to a second embodiment of the present invention. 
     FIGS.  25 ( a ) and  25 ( b ) are schematic, perspective and sectional views, respectively, of a memory unit mounting portion having a tool inserting portion according to a third embodiment of the present invention. 
     FIG. 26 is a schematic, perspective illustration of a memory unit mounting portion having a tool inserting portion according to a fourth embodiment of the present invention. 
     FIG. 27 is a sectional illustration of a memory unit having a tool inserting portion. 
     FIG. 28 is a schematic, perspective illustration of a snap fitting for mounting the memory unit to the cleaner frame. 
     FIG. 29 is a perspective illustration of an example of a process cartridge having a recess for protecting the memory unit. 
     FIG. 30 is a sectional view of a process cartridge shown in FIG.  28 . 
     FIG. 31 is a sectional illustration of protection of the memory unit. 
     FIG. 32 is a perspective illustration of an example of a process cartridge having a projection for protection of the memory unit. 
     FIG. 33 is a sectional view of a process cartridge shown in FIG.  32 . 
     FIG. 34 is a schematic, sectional illustration of an abutment structure between the memory unit and the antenna unit. 
     FIG. 35 is an enlarged sectional view of the abutting portion between the memory unit and the antenna unit shown in FIG.  34 . 
     FIG. 36 is a schematic, perspective view showing details of a major part of an equalizer mechanism. 
     FIG. 37 is an exploded view of the antenna unit and the memory unit in the state of contact. 
     FIG. 38 is a schematic, sectional illustration of another example of an urging mechanism and a positioning mechanism of the antenna unit. 
     FIG. 39 is a schematic, sectional illustration of a further example of the antenna unit urging mechanism and positioning mechanism. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings. 
     In the specification, the lateral direction or widthwise direction is the direction in which the process cartridge B is mounted to the main assembly  14  of the electrophotographic image forming apparatus A, and is the same as the feeding direction of the recording material. The longitudinal direction of the process cartridge B is the direction crossing (substantially perpendicular) the direction in which the process cartridge is mounted to or demounted from the main assembly  14  of the image forming apparatus, and it is parallel with the surface of the recording material and is crossing (substantially perpendicular) the feeding direction of the recording material. With respect to the process cartridge, the left and right are those directions as seen in the feeding direction of the recording material and from the top side. An upper surface of the cartridge B is a surface taking an upper position, and the lower surface is a surface taking a lower position, when the cartridge B is mounted to the main assembly  14  of the apparatus. 
     FIG. 1 is an illustration of an electrophotographic image forming apparatus (laser beam printer) according to an embodiment of the present invention. FIGS. 2-4 relate to a cartridge according to an embodiment of the present invention. FIG. 2 is a sectional side elevation of a cartridge, FIG. 3 is a perspective view of the outer appearance of the cartridge, and FIG. 4 is a perspective view as seen from a top side thereof. 
     A description will be provided as to the general arrangements of the cartridge and the electrophotographic image forming apparatus, and then as to the structure of the cartridge. 
     (General arrangement) 
     Referring to FIG. 1, the electrophotographic image forming apparatus (laser beam printer) A according to an embodiment of the present invention will be described. FIG. 2 is a sectional side elevation of the cartridge B. 
     As shown in FIG. 1, the image forming apparatus A operates to form an image on a recording material (recording paper, OHP sheet, textile or the like)  2  through an electrophotographic image forming process. A toner (developer) image is formed on an electrophotographic photosensitive member in the form of a drum (photosensitive drum). More particularly, the photosensitive drum is electrically charged by charging means. Then, the photosensitive drum is exposed to a laser beam modulated in accordance with image information by optical means so that an electrostatic latent image is formed in accordance with the image information on the photosensitive drum. Subsequently, the electrostatic latent image is developed by developing means to form a toner image. Then, in synchronism with the formation of the toner image, the recording material  2  in the sheet feeding cassette  3   a  (feeding unit) is fed by a pick-up roller  3   b  along a feeding path  3   c  to a pair of registration rollers  3   e.  The toner image formed on the photosensitive drum  7  provided in the cartridge B is transferred onto the recording material  2  fed in timed relation with the image formation by the registration rollers, by application of the voltage to the transfer roller  4 . Thereafter, the recording material  2  having received the toner image is fed to the fixing unit  5  along the feeding guide  3   f.  The fixing means  5  comprises a driving roller (pressing roller)  5   c  and a fixing roller  5   b  having a heater  5   a  therewithin. The toner image on the recording material  2  is fixed by application of heat and pressure. The recording material  2  is discharged to the discharging tray  6  by a pair of discharging rollers  3   i.  Here, the feeding cassette  3   a  is demountable to the main assembly  14  of the image forming apparatus. The feeding cassette  3   a  comprises a cassette frame  3   a   1  (unit frame), and accommodates the recording materials  2  in the cassette frame  3   a   1 . The fixing unit  5  has a unit frame  5   d . The unit frame  5   d  rotatably supports the driving roller  5   c  and the fixing roller  5   b . In FIG. 1, designated by reference numeral  48  is a controlling unit. The controlling unit  48  functions to control the entirety of the electrophotographic image forming apparatus A. 
     In this embodiment, the developing means  9  is provided in the process cartridge B. However, the developing means  9  may be an independent developing unit which is detachably mountable to the main assembly  14  of the apparatus. 
     (Process cartridge) 
     On the other hand, the cartridge B comprises the electrophotographic photosensitive member and at least one of process means. The process means includes charging means for electrically charging the electrophotographic photosensitive member, the developing means for developing the electrostatic latent image formed on the electrophotographic photosensitive member, cleaning means for cleaning the surface of the electrophotographic photosensitive member to remove the residual toner, or the like. As shown in FIGS. 2-4, in the cartridge B of this embodiment, the photosensitive drum  7  having a photosensitive layer is rotated, and the surface thereof is uniformly charged by application of a voltage to the charging roller  8 . Then, a laser beam modulated in accordance with image information and supplied from an exposure device  1  (optical means) is projected onto the surface of the photosensitive drum  7  through an exposure opening  1   e , by which an electrostatic latent image is formed. Then, the electrostatic latent image is developed by developing means  9  using toner. The charging roller  8  is provided contacted to the photosensitive drum  7  to electrically charge it. The charging roller  8  is driven by the photosensitive drum  7 . The developing means 9 supplies the toner to a developing zone of the photosensitive drum  7  to develop the electrostatic latent image formed on the photosensitive drum  7 . 
     Here, the developing means  9  feeds the toner from the toner container  11  A toward the developing roller  9   c  by rotation of the toner feeding member  9   b.  The developing roller  9   c  contains therein a fixed magnet and is rotated, and a layer of toner triboelectrically charged by a developing blade  9   d  is formed on a surface of the developing roller  9   c.  The toner is supplied to the developing zone of the photosensitive drum  7 . The toner image is formed (visualization) by transferring the toner in accordance with the electrostatic latent image onto the photosensitive drum  7 . Here, the developing blade  9   d  functions to regulate the amount of the toner applied on the peripheral surface of the developing roller  9   c  and to apply the triboelectric charge to the toner particles. A rotatable toner stirring member  9   e  is provided adjacent to the developing roller  9   c  to circulate the toner in the developer chamber. 
     In the next station, there is a transfer roller  4  which is supplied with a voltage having a polarity opposite from that of the toner image. By doing so, the toner image formed on the photosensitive drum  7  is transferred on to the recording material  2 . Thereafter, the photosensitive drum  7  is cleaned by the cleaning means  10  so that residual toner thereon is removed. The cleaning means  10  comprises an elastic cleaning blade  10   a  contacted to the photosensitive drum  7  and functions to scrape the residual toner off the photosensitive drum  7  and collect the scraped toner in a removed toner container  10   b.    
     The cartridge B comprises a toner frame  11  having a toner container (toner accommodating portion)  11 A for accommodating the toner, and a developing frame  12  supporting developing members such as a developing roller  9   c,  a developing blade  9   d  or the like, which frames are coupled with each other. To the coupled frames  11 ,  12 , the cleaner frame  13  supporting the photosensitive drum  7 , the cleaning means  10  such as the cleaning blade  10   a  and the charging roller  8 , is coupled. 
     The cartridge B is detachably mountable to the main assembly  14  of the apparatus by the user. 
     The process cartridge B is provided with an exposure opening  1   e  for permitting exposure of the photosensitive drum  7  to the image information light and with an opening for facing the photosensitive drum  7  to the recording material  2 . The exposure opening le is formed in the cleaner frame  13 . A transfer opening  13   c  is formed between the developing frame  12  and the cleaner frame  13 . 
     A description will be provided as to the structures of the housing (the cartridge frame). 
     The cartridge B in this embodiment is constituted by the toner frame  11  and the developing frame  12  which are coupled with each other. The cleaner frame  13  is rotatably coupled with the frame constituted by the frames  11 ,  12 , by which the housing is constituted. The photosensitive drum  7 , the charging roller  8 , the developing means  9 , the cleaning means  10  and the like, are contained in the housing to constitute the cartridge. The cartridge B is demountably mounted to the main assembly  14  of the apparatus by the operator moving it in the direction of arrow X (FIG. 1) to the cartridge mounting means. 
     (Structure of housing of cartridge) 
     The cartridge B of this embodiment, as described hereinbefore, is constituted by the toner frame  11 , the developing frame  12  and the cleaner frame  13  which are coupled to constitute the housing. A description will be provided as to the structure thereof. 
     As shown in FIG. 2, the toner feeding member  9   b  is rotatably mounted to the toner frame  11 . The developing roller  9   c  and the developing blade  9   d  are mounted to the developing frame  12 . Furthermore, a toner stirring member  9   e  for circulating the toner in the developer chamber is rotatably mounted in the neighborhood of the developing roller  9   c.  To the developing frame  12 , as shown in FIG. 2, an antenna rod  9   h  is mounted and extended substantially parallel with the developing roller  9   c.  The toner frame  11  and the developing frame  12  are welded with each other (ultrasonic welding in this embodiment) to constitute an integral developing unit D. 
     The developing unit D is provided with a drum shutter member  18  which functions to cover the photosensitive drum  7  when the cartridge B is dismounted from the main assembly  14  of the apparatus. The shutter member  18  is effective to prevent the photosensitive drum  7  from being exposed to light for a long term or to prevent it from being contacted by foreign matter. 
     As shown in FIG. 2, the cleaner frame  13  supports the photosensitive drum  7 , the charging roller  8  and the cleaning means  10  to constitute a cleaning unit C. 
     The developing unit D and the cleaning unit C are rotatably coupled with each other by a connecting member (pin)  22 . In this manner, the cartridge B is constructed. As shown in FIG. 2, the developing frame  12  is provided at each of the opposite longitudinal ends (the axial direction of the developing roller  9   c ) with an arm portion  19 . On the other hand, the cleaner frame  13  is provided at each of the opposite ends thereof with a recess  21  for receiving the arm portion  19 . By inserting the arm portion  19  into the recess  21 , and press fitting the connecting member  22  into holes  13   e,    20  formed in the cleaner frame  13  and in the arm portion  19 , the developing unit D and the cleaning unit C are coupled for rotation about the connecting member  22 . At this time, a compression coil spring  22   a  mounted to a dowel (unshown) provided at a base portion of the arm portion  19  is abutted to an upper wall of the recess  21  of the cleaner frame  13 . Thus, the developing frame  12  is urged downward by the elastic force of the spring  22   a.  By this, the developing roller  9   c  is assuredly urged to the photosensitive drum  7  through spacer rollers (unshown). 
     (Structure of guide means of cartridge) 
     A description will be provided as to the guide means for guiding the process cartridge B when it is mounted to the main assembly  14  of the apparatus. FIGS. 5 and 6 show the guide means. FIG. 5 is a perspective view as seen from the left side (from the developing unit D side) in the direction (arrow X) in which the process cartridge B is mounted to the main assembly A. FIG. 6 is a perspective view of the righthand side. 
     As shown in FIGS. 3 and 4, each of the opposite ends of the cleaner frame  13  is provided with guide means to be guided when the cartridge B is mounted to the main assembly  14  of the apparatus. The guide means comprises cylindrical guides  13   a R,  13   a L functioning as a guide member for determining the position of the cartridge relative to the main assembly of the apparatus, and an anti-rotation guide  13   b R functioning as a stopper for preventing rotation of the process cartridge when it is mounted to the main assembly of the apparatus. 
     As shown in FIG. 3, the guide  13   a R is in the form of a hollow cylindrical member. The guide  13   b R is integrally formed with the guide  13   a R, and is extended radially outwardly along a line from the circumference of the guide  13   a R. The guide  13   a R is provided with an integral flange  13   a R 1 . The righthand side guide member  13 R having the guide  13   a R, guide  13   b R and the flange  13   a R 1  is fixed to the cleaner frame  13  by screws (unshown) threaded through the screw holes of the flange  13   a R 1 . The guide  13   b R of the right-hand side guide member  13 R fixed to the cleaner frame  13  is disposed adjacent the side surface of the developing frame  12  such that it is extended to extend over the end of the development holder  40  fixed to the developing frame  12 . 
     As shown in FIG. 4, to the side surface of the cleaner frame  13 , a flange  29  in the form of a flat plate is engaged with the positioning pin  13   c  for anti-rotation, and is fixed to the cleaner frame  13  by screws (unshown). The flange  29  is provided with a cylindrical guide  13   a L extended outwardly in the direction of the axis of the photosensitive drum  7 . 
     A description will be provided as to a regulating abutment  13   j  provided on the upper surface  13   i  of the cleaning unit C. Here, the upper surface is the surface which takes an upper position when the cartridge B is mounted to the main assembly  14  of the apparatus. 
     In this embodiment, as shown in FIGS. 3 and 4, the regulating abutment or contact portion  13   j  is provided on a right-hand end  13   p  and left-hand end  13   q,  in the direction perpendicular to the mounting direction of the cartridge, on the upper surface  13   i  of the cleaning unit C. The contact portion  13   j  functions to regulate the position of the cartridge B when the cartridge B is mounted to the main assembly  14  of the apparatus. Therefore, when the cartridge B is mounted to the main assembly  14  of the apparatus, the regulating abutment  13   j  contacts the fixing member  25  (FIGS. 5 and 6) provided in the main assembly  14  of the apparatus. By this, the angular position of the cartridge B about the guides  13   a R,  13   a L, is determined. 
     A description will be provided as to the guide means (mounting means) provided in the main assembly  14  of the apparatus. When the opening and closing member  35  of the main assembly  14  of the apparatus is rotated in the couterclockwise direction in FIG. 1 about the fulcrum  35   a,  the upper portion of the main assembly  14  of the apparatus is opened. By this, the mounting portion of the cartridge B can be seen (FIGS. 5,  6 ). Left and right inner walls of the main assembly  14  of the apparatus are provided with guide members  16 L,  16 R, respectively. 
     The guide members  16 R,  16 L are provided with guide portions  16   a,    16   c  which are inclined downward as seen in a direction of arrow X 1  (inserting direction of the cartridge B) and semicircular positioning grooves  16   b,    16   d  which continue from the guide portions  16   a,    16   c  and into which the guides  13   a R,  13   a L of the cartridge B are snugly fitted. The grooves  16   b,    16   d  have cylindrical circumference walls. The centers of the grooves  16   b,    16   d  are concentric with the center of the guides  13   a R,  13   a L of the cartridge B when the cartridge B is mounted to the main assembly  14  of the apparatus. Therefore, they are concentric with the photosensitive drum  7 . 
     The guide portions  16   a,    16   c  are so large that guides  13   a R,  13   a L are loosely fitted therein in the mounting-and-demounting direction of the cartridge B. The guide  13   b R is therefore loosely fitted, since it has a width smaller than the diameter of the guide  13   a R. However, guides  13   a R,  13   a L and the guide  13   b R are limited in their movement in the rotational direction by the guide portion  16   a.  By this, the cartridge B is mounted to the main assembly  14  of the apparatus with an orientation within a limited range. When the cartridge B has been mounted to the main assembly  14  of the apparatus, the guides  13   a R,  13   a L of the cartridge B are engaged with the grooves  16   b,    16   d.  And, the contact portion  13   j  is contacted to the fixing member  25  of the main assembly  14  of the apparatus. 
     The weight distribution of the cartridge B is such that due to the center line connecting the centers of the guides  13   a R,  13   a L, the developing unit D side is heavier than the cleaning unit C side, and therefore, the resulting static moment is in the direction of lowering the developing unit D side. 
     When the user mounts the cartridge B into the main assembly  14  of the apparatus, the user&#39;s hand grips the toner frame  11  shown in FIG. 2 at the recess  17  and the lower side rib  11   c.  Then, the guides  13   a R,  13   a L are inserted along the guide portions  16   a,    16   c,  and the guide  13   b R is inserted into the guide portion  16   c  of the main assembly  14  of the apparatus. Finally, a drive transmitting member  36  (FIG. 3) provided integrally with a drum gear (unshown) fixed to the end of the photosensitive drum  7  is engaged with a drive transmitting member  39  (FIG. 6) provided in the groove  16   d,  so that position of the photosensitive drum  7  relative to the main assembly  14  of the apparatus is determined. 
     The steps of dismounting the cartridge B from the main assembly  14  of the apparatus are opposite from the steps described in the foregoing. More particularly, the user opens the opening and closing member  35 , and grips the grip portion of the cartridge B at the upper and lower rib  11   c  and raises the cartridge B. Then, the user pulls the cartridge B along the guide portions  16   a,    16   c.    
     The photosensitive drum  7  of the cartridge B is provided with a spur gear (unshown) at the opposite end of the drive transmitting member  36 . The spur gear is brought into meshing engagement with a gear (unshown) which is coaxial with a transfer roller  4  provided in the main assembly  14  of the apparatus when the cartridge B is mounted to the main assembly  14  of the apparatus, so that a driving force for rotating the transfer roller  4  is transmitted from the cartridge B to the transfer roller  4 . 
     (Wireless communication system) 
     A description will be provided as to an information communication system of a wireless type for communication between the main assembly  14  of the apparatus and the cartridge B. 
     In this embodiment, the wireless communication system is such that cartridge B is provided with a magnetic core which functions as a communication antenna. The main assembly  14  of the apparatus is provided with an inductor which functions as a communication antenna. When the cartridge B is mounted to the main assembly  14  of the apparatus, the information communication between the main assembly  14  and the cartridge B is wirelessly carried out through electromagnetic induction of the inductor type through the magnetic core. In other words, in this embodiment, the information communication between the main assembly  14  of the apparatus and the cartridge B is effected between antennas using electromagnetic energy. Thus, the information communication is carried out wirelessly. By doing so, the possible size-increase of the cartridge B is avoided, and communication trouble is avoided due to improper mechanical contact between connectors for information transmission provided in the main assembly  14  of the apparatus and in the cartridge B. 
     Referring to FIGS. 1,  3 ,  4 ,  7 , and  8 , a description will be provided as to the wireless communication system according to an embodiment of the present invention. 
     As shown in FIGS. 1,  3 ,  4 , and  7 , the cartridge  2  is provided with a memory unit  44  (memory member). The main assembly  14  of the apparatus is provided with a communicating unit  47  (main assembly communicating means). The communicating unit  47  comprises a communication controlling unit  45  fixed to the main assembly  14  of the apparatus, an equalizer mechanism  70  provided in the main assembly  14  of the apparatus, and an antenna unit  41  (main assembly antenna) connected to the communication controlling unit  45 . Between the memory unit  44  provided in the cartridge B and the communicating unit  47  provided in the main assembly  14  of the apparatus, the communication is electrically carried out without contact. That is, wireless information communication is provided. As shown in FIG. 8 when the cartridge B is mounted to the main assembly  14  of the apparatus, a communication antenna of substrate unit  44   b  ( 44   b   2 ) (memory antenna) provided in the unit  44  and a communication antenna also called an antenna substrate  41   c  (main assembly antenna) provided in the antenna unit  41 , face each other with correct positioning accomplished by the equalizer mechanism  70 . More particularly, by the abutment of the frame member  44   a  (outer casing member) to the antenna cover  41   a,  the gap between the communication antenna  44   b   2  (memory antenna) and the communication antenna  41   c  (main assembly antenna) is regulated. Then, the electric energy is supplied to the storing element  44   b   1  of the unit  44 , so that wireless commutation between the unit  45  and the storing element  44   b   1  is enabled. Thus, information can be read from or 
     A description will be provided as to the wireless communication system, more particularly, the memory unit, an arrangement and structure of the memory unit, an abutment structure between the memory unit and the antenna unit and the structure of the wireless communicating mechanism, in the order named. 
     Memory unit 
     (Memory unit structure  1 ) 
     (First embodiment) 
     Referring to FIG. 9, a structure of the memory unit will be described. Figure 9 is an exploded perspective view of a memory unit. 
     A unit  44  is in the form of a tag comprising a substrate unit  44   b  and a frame member  44   a  (outer casing member) covering the substrate unit  44   b.  The substrate unit  44   b  includes a storing element  44   b   1  for storing information, an antenna  44   b   2  (i.e., magnetic core as a memory antenna) for communication and a rectangular substrate or base plate  44   b   3  for carrying the storing element  44   b   1  and the communication antenna  44   b   2 , as a unit. The storing element  44   b   1  is provided on the rectangular substrate  44   b   3  made of epoxy resin material. More particularly, the storing element  44   b   1  is provided on a back side  44   b   31  of the substrate  44   b   3  (the side opposite from the side which faces the antenna unit  41  provided in the main assembly  14  of the apparatus), and is disposed outside a conduction pattern  44   b   21  constituting the antenna  44   b   2 . The storing element  44   b   1  comprises a FERAM. The storing element  44   b   1  is integral with a sending or communication circuit  44   b   11  (sending member) shown in FIG.  15 . The sending circuit  44   b   11  functions to send the information stored in the storing element  44   b   1  to the antenna  44   b   2 . The sending circuit  44   b   11  will be described in detail hereinafter. The antenna  44   b   2  has an electroconductive pattern  44   b   21  in the form of a volute extended on the substrate  44   b   3  along the sides of the rectangular shape of the substrate  44   b   3 . The pattern  44   b   21  is formed continuously on the back side  44   b   31  and on the front surface  44   b   32  of the substrate  44   b   3  by printing. The pattern  44   b   21  is connected with the storing element  44   b   1  (FERAM, for example). 
     In summary, the back side  44   b   31  of the substrate  44   b   3  is provided with the storing element  44   b   1 , the sending circuit  44   b   11  and the electroconductive pattern  44   b   21  (memory antenna). The memory antenna, at its one and the other ends, is electrically connected to the sending circuit  44   b   11 . 
     The substrate unit  44   b  having such a structure is disposed in the frame member  44   a  functioning as an outer casing member. The frame member  44   a  comprises an upper outer casing portion (upper frame  44   a   1 ) made of polystyrene resin material and a lower outer casing portion (lower frame  44   a   2 ). The upper frame  44   a   1  and the lower frame  44   a   2  are provided with projected portions  44   a   11 ,  44   a   21 , respectively, at the circumference thereof. The projected portions  44   a   11 ,  44   a   21  of the upper frame  44   a   1  and the lower frame  44   a   2  are contacted to each other to constitute a frame member  44   a.  The projected portions  44   a   11 ,  44   a   21  of the upper frame  44   a   1  and the lower frame  44   a   2  are fixed by an adhesive material, welding, ultrasonic welding or the like after the substrate unit  44   b  is inserted. The material of the frame member  44   a  has a physical strength against the abutment to the unit  41  constituting the unit  47  of the main assembly  14 , and has an electrostatic shield property. More particularly, the frame member  44   a  is made of a material having a dielectric constant of 2-5. The dielectric constant is determined by ASTM test method D  150 . The material of the outer casing member frame member  44   a  may be the above-described polystyrene resin material, acrylic nytril butadiene resin material, polycarbonate resin material or the like. 
     In such a unit  44 , the substrate unit  44   b,  provided with substrate  44   b   3  having the storing element  44   b   1 , the communication antenna  44   b   2  and the sending circuit  44   b   11 , is covered with the frame member  44   a.  Therefore, the storing element  44   b   1  can be protected from an external load or from electrical influence. Since the substrate unit  44   b  is contained in the frame member  44   a  to constitute a tag-like member, the carrying space can be efficiently determined in the main assembly  14  or in the cartridge B. In addition, since it is constituted by three members, namely, the substrate unit  44   b,  the upper frame  44   a   1  and the lower frame  44   a   2 , the assembling operation is easy. 
     (Second embodiment) 
     FIG. 10 is a perspective view of a memory unit according to a second embodiment of the present invention. 
     In this embodiment, the frame member  44   a  covering the unit  44   b  is produced through an injection molding of a resin material. More particularly, the memory unit  44  of this embodiment is produced by inserting a substrate unit  44   b  into a resin material mold and ejecting the resin material (insertion molding) with the inserted state. 
     In this case, the same advantageous effects as with the first embodiment can be provided. 
     (Third embodiment) 
     FIG. 11 is a sectional view of a memory unit according to a third embodiment of the present invention. 
     In this embodiment, a frame member (outer casing member)  44   a  covering the unit  44   b  is constituted by the resin material case  44   a   3  and a resin material or an elastomer  44   a   4  injected into the resin material case  44   a   3 . In this embodiment, the unit  44  is produced by inserting the unit  44   b  into the resin material case  44   a   3  and injecting the elastomer  44   a   4  into the case  44   a   3  to fill it up. 
     With this structure, the unit  44  is advantageous similarly to the memory unit  44  in the first embodiment. 
     In the foregoing embodiments, the unit  44   b  is constituted by the storing element  44   b   1  provided with the sending circuit  44   b   11  and the communication antenna  44   b   2  which are disposed on the substrate  44   b   3  of the epoxy resin material. However, it is an alternative that they are disposed on different substrates, and they are connected by metal contacts or leads or the like. 
     In the memory unit  44  in the foregoing embodiments, there are provided a beveled portion and a stepped portion although they are not shown in the figures. 
     The information stored in the storing element  44   b   1  are related with the process cartridge unit. For example, it is an integrated number of rotations of the photosensitive drum, the integrated charging time of the charging means, the remaining amount of the developer, or the like. 
     (Memory unit structure  2 ) 
     (First embodiment) 
     In the foregoing embodiments, the memory unit  44  has the unit  44   b  in which the storing element  44   b   1  is disposed outside the antenna  44   b   2 . In this embodiment, the memory unit has a substrate unit in which the storing element is disposed inside the antenna. FIG. 12 is an exploded perspective view of a memory unit according to this embodiment of the present invention. FIG. 13 is an outer appearance of the memory unit shown in FIG. 12, where (a) is a top plan view of the memory unit, (b) is a front view of the memory unit, and (c) is a bottom view of the memory unit. FIG. 14 is a sectional view of the memory unit shown in FIG.  12 . The same reference numerals as with the foregoing memory unit are assigned to the corresponding elements. 
     As shown in FIGS. 12 and 13, the unit  44  of this embodiment is in the form of a tag comprising a substrate unit  44   b  and a frame member  44   a  as an outer casing member covering the substrate unit  44   b.  The substrate unit  44   b  includes a storing element  44   b   1  for storing information, an antenna  44   b   2  (i.e., a magnetic core as a memory antenna) for communication and a substrate  44   b   3  for carrying the storing element  44   b   1  and the communication antenna  44   b   2 , as a unit. The storing element  44   b   1  is provided on a rectangular substrate  44   b   3  made of epoxy resin material. More particularly, the storing element  44   b   1  is provided on a back side  44   b   31  of the substrate  44   b   3  (the side opposite from the side which faces the antenna unit  41  provided in the main assembly  14  of the apparatus), and is disposed inside a conduction pattern  44   b   21  constituting the antenna  44   b   2 . More particularly, it is provided inside the pattern  44   b   21  substantially at the center portion of the back side of the substrate  44   b   3 . The storing element  44   b   1  comprises a FERAM. The storing element  44   b   1  is integral with the sending circuit  44   b   11  functioning as the sending member shown in FIG.  15 . The antenna  44   b   2  is provided on a surface  44   b   31  (the side facing the antenna unit  41  provided in the main assembly  14  of the apparatus) of the substrate  44   b   3 . The antenna  44   b   2  has a pattern  44   b   21  in the form of a volute extended along the sides of the rectangular shape of the substrate  44   b   3 . The pattern  44   b   21  is formed on the substrate  44   b   3  by pattern printing. The pattern  44   b   21  is connected with a storing element  44   b   1  (FERAM). The unit  44   b  thus constructed is disposed in the frame member  44   a.  The frame member  44   a  comprises an upper outer casing portion (upper frame  44   a   1 ) made of polystyrene resin material and a lower outer casing portion (lower frame  44   a   2 ). The upper frame  44   a   1  and the lower frame  44   a   2  are provided with projected portions  44   a   11 ,  44   a   21 , respectively, at the circumference thereof. The projected portions  44   a   11 ,  44   a   21  of the upper frame  44   a   1  and the lower frame  44   a   2  contact each other to constitute a frame member  44   a . 
     The projected portions  44   a   11 ,  44   a   21  of the upper frame  44   a   1  and the lower frame  44   a   2  are fixed by an adhesive material, welding, ultrasonic welding or the like after the unit  44   b  is inserted. More particularly, the frame member  44   a  is made of a material having a dielectric constant of 2-5. The material of the nonelectroconductive member may be the above-described polystyrene resin material, acrylic nytril butadiene resin material, polycarbonate resin material or the like. 
     Referring to FIG. 15, a description will be provided as to the inner structure of the storing element  44   b   1 . 
     FIG. 15 shows a circuit of a storing element. As shown in FIG. 15, the storing element  44   b   1  is formed integrally with a sending circuit  44   b   11  provided on the substrate  44   b   3 . The circuit  44   b   11  functions to supply the information stored in the storing element  44   b   1  to the antenna  44   b   2 . The antenna  44   b   2  comprises a coil  44   b   22 , a capacitor  44   b   23  and an electroconductive pattern  44   b   21  in the form of a volute. To the antenna  44   b   2 , there are connected a rectifying circuit  81  of the sending circuit  44   b   11 , a sending modulation circuit  82  and a demodulation device  83 . The output of the rectifying circuit  81  is connected to the voltage source circuit  89  to supply the electric energy to a non-volatile memory  88 . It further comprises a decoder  84 , a protcol controller  85 , an encoder  86 , a memory interface circuit  87 , a non-volatile memory  88  such as an EEPROM or a strong dielectric member memory. When the signal is demodulated from a high frequency signal to a base band signal by the demodulation device  83 , it is converted to a signal proper for supply to the memory  88  in accordance with a control of the protcol controller  85  by the decoder  84 . The circuit  87  classifies the signal into the address and the data, and the reading and writing is carried out to and from the memory  88  in accordance with a read/write command. The data read out of the memory  88  is send from the circuit  87  to the encoder  86 , and is converted to a protocol proper to the communication, and then it is sent from the sending modulation circuit  82  to the antenna  44   b   2 . 
     With such a structure of the memory unit  44 , when the unit  44  is abutted to the antenna unit  41  provided in the main assembly  14  of the apparatus, the antenna  44   b   2  of the unit  44   b  can face the unit  41 . Therefore, the distance between the antenna  41   c  and the antenna  44   b   2  can be minimized. Because of this, the level of the output of the antenna unit  41  provided in the main assembly  14  of the apparatus can be minimized. 
     In addition, the wireless communication distance between the antenna  41   c  and the antenna  44   b   2  can be minimized. Therefore, the wireless communication is substantially free of external disturbance such as noise, and therefore, the reliability in the communication is improved. 
     For example, in this embodiment, the distance between the antenna  41   c  (main assembly antenna) and the antenna  44   b   2  can be maintained at 1.75 mm-3.25 mm. The distance is merely an example, and the distance between the antennas  41   c,    44   b   2  may practically be 1 mm-10 mm. 
     The storing element  44   b   1  is disposed inside the antenna  44   b   2 . Therefore, the area of the unit  44   b  can be reduced. For this reason, the memory unit  44  can be downsized. 
     The unit  44   b  is covered with the frame member  44   a.  Therefore, the same advantageous effects as with the foregoing memory unit  44  can be provided in addition to the above-described advantageous effects. 
     (Second embodiment) 
     FIG. 16 is a sectional view of a memory unit according to a second embodiment of the present invention. 
     In this embodiment, the frame member  44   a  covering the substrate unit  44   b  is produced from a resin material by an injection molding. More particularly, the unit  44  is produced by inserting the unit  44   b  into a mold of the resin material and ejecting the resin material in this state. 
     In this case, the same advantageous effects as with the first embodiment can be provided. 
     (Third embodiment) 
     FIG. 17 is a sectional view of a memory unit according to a third embodiment of the present invention. 
     In this embodiment, a frame member  44   a  covering a substrate unit  44   b  is constituted by a resin material case  44   a   3 , resin material injected in the resin material case  44   a   3  and an elastomer  44   a   4 . In this embodiment, the unit  44  is produced by inserting the unit  44   b  into a resin material case  44   a   3  and injecting the elastomer  44   a   4  into the case to fill it up. 
     In this case, the same advantageous effects as with the first embodiment can be provided. 
     In the foregoing embodiments, the substrate unit  44   b  comprises the storing element  44   b   1  having the circuit  44   b   11  and the antenna  44   b   2 , which are disposed on the substrate  44   b   3  of epoxy resin material. However, it is an alternative that they are disposed on different substrates, and they are connected by metal contacts or leads or the like. 
     (Fourth embodiment) 
     In the foregoing abutments, the communication antenna  44   b   2  is provided only on the back side  44   b   31  of the substrate  44   b   3 . In this embodiment, the memory unit has a substrate unit in which a communication antenna is extended on both of the front and back sides of the substrate. FIG. 18 is a sectional view of a memory unit according to this embodiment of the present invention. The same reference numerals as with the memory unit of the first embodiment are assigned to the element having the corresponding functions. 
     As shown in FIG. 18, the memory unit  44  of this embodiment comprises an electroconductive pattern  44   b   21  of the antenna  44   b   2  on the front surface  44   b   32  of the substrate  44   b   3  (the surface to face the antenna unit  41  of the main assembly  14  of the apparatus) and on a back side  44   b   31  (the surface opposite from the front surface to be opposed to the antenna unit  41 , namely, the surface having the storing element  44   b   1 ). More particularly, as shown in FIG. 19, the electroconductive pattern  44   b   21  of the antenna  44   b   2  penetrates the surface  44   b   32  of the substrate  44   b   3 , and then through the substrate  44   b   3  to the back side  44   b   31  of the substrate  44   b   3 . Then, it penetrates the back side  44   b   31  of the substrate  44   b   3  and then the substrate  44   b   3  back to the front surface  44   b   32  of the substrate  44   b   3 . Designated by reference numeral  44   b   4  is a hole for passing it, provided in the substrate  44   b   3 . Through the hole  44   b   4 , the electroconductive pattern  44   b   21  is electrically connected between the front surface  44   b   32  side and the back side  44   b   31  side. One and the other ends of the electroconductive pattern  44   b   21  are electrically connected with the sending circuit  44   b   11  of the storing element  44   b   1 . The pattern  44   b   21  is in the form of a volute extended along sides of the rectangular shape of the substrate  44   b   3  similarly to first embodiment. The storing element  44   b   1  is covered with and protected by a bonding  44   c  of a resin material on the substrate  44   b   3 . In a manufacturing step of the substrate unit  44   b  or in a memory unit assembling step of assembling the upper frame  44   a   1 , the lower frame  44   a   2  and the substrate unit  44   b,  the storing element  44   b   1  can be protected from forces external thereto. With this structure of the unit  44 , similarly to the unit  44  of the first embodiment, when the unit  44  is abutted to the antenna unit  41  provided in the main assembly  14  of the apparatus, the antenna  44   b   2  in the substrate unit  44   b  can face the antenna unit  41 . Therefore, the distance between the antenna  41   c  (main assembly antenna) and the antenna  44   b   2  (memory antenna) can be minimized. In this embodiment, the distance between the antennas  41   c,    44   b   2  is 1.75 mm-3.25 mm. This is effective to minimize the output of the antenna unit  41  provided in the main assembly  14  of the apparatus for the wireless communication. The minimization of the communication distance between the antenna  41   c  and the antenna  44   b   2  is effective to make the communication substantially free of external disturbances such as noise. Therefore, the reliability of the wireless communication can be improved. Additionally, the wireless communication is possible between the antenna  41   c  and the antenna  44   b   2  provided on both of the front surface  44   b   32  and the back side  44   b   31  of the substrate  44   b   3 , and this is effective to further improve the reliability of the wireless communication. By the provision of the antenna  44   b   2  on both of the front and back sides of the substrate  44   b   3 , the number of windings of the antenna  44   b   2  can be increased. By doing so, the output of the antenna  44   b   2 , that is, the intensity of the electromagnetic field, can be enhanced. 
     The storing element  44   b   1  is disposed inside the antenna  44   b   2  on the substrate  44   b   3 . This is effective to reduce the area of the substrate unit  44   b.  For this reason, the memory unit  44  can be downsized. 
     The substrate unit  44   b  is covered with a frame member  44   a.  Therefore, the same advantageous effects as with the foregoing memory unit  44  can be provided in addition to the above-described advantageous effects. 
     (Memory unit mounting structure) 
     Referring to FIGS. 19,  20 , a description will be provided as to a memory unit mounting structure. 
     FIG. 19 is a perspective view of a memory unit which is provided with a beveled portion and a stepped portion. FIG. 20 illustrates a memory unit mounting portion in the cartridge side. 
     When the memory unit  44  is mounted on a frame, it is desirable to provide a means to prevent the memory unit  44  from being mounted upside down or to prevent the memory unit  44  from being mounted with a wrong orientation. When the memory unit  44  is mounted upside down, the distance between the antenna  41   c  and the antenna  44   b   2  are different from the predetermined distance with the result of deterioration of the reliability in the communication. When the mounting orientation of the memory unit  44  is wrong, the correct facing between the antenna  41   c  and the antenna  44   b   2  is not accomplished with a result of deterioration of the reliability in the communication, again. 
     In order to assure the reliability of the communication between the antenna  41   c  and the antenna  44   b   2 , it is desirable that the facing orientation of the memory unit  44  and the facing position are regulated. 
     In this embodiment, means are provided to determine the facing orientation and the facing position of the memory unit  44  relative to the antenna  41   c.  As shown in FIG. 19, a beveled portion  44   a   5  functioning as a regulating portion is provided at one of the corner portions  44   a   7  at the outer periphery of the frame member  44   a  of the memory unit  44 . The beveled portion  44   a   5  is effective to regulate the mounting position or orientation of the memory member when it is mounted. As shown in FIGS. 1 to  4 , the memory unit  44  is mounted to the cleaning unit C. As shown in FIG. 20, the cleaner frame  13  of the cleaning unit C is provided with a memory unit mounting portion  13   k  for detachably mounting the unit  44 . The memory unit mounting is provided at a position in which the memory unit  44  faces the antenna unit  41  in the inserting direction of the cartridge B. The memory unit mounting portion  13   k  is provided at a leading end portion of the cleaner frame  13  with respect to the cartridge mounting direction. The mounting portion  13   k  is provided with a beveled portion  13   k   1  functioning as a main assembly side regulating portion, at one of the inner corner portions. More particularly, it is substantially the same as the memory unit  44  in shape. The beveled portion  13   k   1  provided in the memory unit mounting portion  13   k  is complementary with the beveled portion  44   a   5  provided in one of the corner portions of the memory unit  44 . 
     When the memory unit  44  is mounted to the memory unit mounting portion  13   k,  it is fitted into the memory unit mounting with the beveled portions  44   a   5 ,  13   k   1  aligned with each other in the mounting direction of the memory unit  44 . By doing so, the facing orientation of the memory unit  44  relative to the communication antenna  41   c  or the facing position can be regulated. By doing so, an erroneous facing orientation of the memory unit  44  can be avoided during the mounting operation. In addition, an erroneous mounting direction of the memory unit  44  does not occur during the mounting operation. The depth of the mounting portion  13   k  is substantially the same as the thickness of the unit  44 . 
     (Assembling method of memory unit and feeding guide structure) 
     A description will be provided as to mounting of the memory unit  44  to the cleaning unit C using an automatic assembling apparatus (unshown). In this case, a parts feeder may be used to align the unit  44 . In the parts feeder, a great number of units  44  are carried on a supporting table, and the supporting table is vibrated to move the units while directing them uniformly, and then feeding the units  44  to the finger portion of the automatic assembling apparatus. In this embodiment, the units  44  can be supplied to the automatic assembling apparatus using the parts feeder. To accomplished this, as shown in FIG. 19, the back side of the unit  44  is provided with a stepped portion  44   a   6 , which functions as a guide portion (feeding guide). Here, the back side of the memory unit  44  is the surface opposite from the side to face the antenna unit  41  provided in the main assembly  14  of the apparatus when the unit  44  is mounted to the main assembly  14  of the apparatus. The stepped portion  44   a   6  is provided along one of the long sides of the unit  44  and extends in the longitudinal direction of the unit  44 . In other words, it is provided on an outer surface of the unit  44  having a substantially rectangular parallelopiped configuration and extends in the longitudinal direction as shown in FIGS. 13,  14 ,  16 - 19 ,  21 , and  22 . 
     FIG. 21 shows an example of the parts feeder for feeding the memory unit. FIG. 22 is a sectional view of a feeding guide of the parts feeder. As shown in FIG. 21, the parts feeder  46  comprises a feeding guide  46   a  which is in the form of a supporting table for carrying and moving a number of memory units  44  by imparting vibration or the like. The feeding guide  46   a  is channel-shaped for guiding the outer surface of the unit  44  in the longitudinal direction of FIG.  22 . The side of the feeding guide  46   a  which faces the bottom surface side of the unit  44 , is provided with a guide stepped portion  46   a   1  which extends in the longitudinal direction corresponding to the stepped portion  44   a   6 . The guide stepped portion  46   a   1  is shaped such that when the unit  44  is on the feeding guide  46   a  with the back side thereof facing down, the guide stepped portion  46   a   1  supports the stepped portion  44   a   6  of the unit  44 . 
     When the units  44  are supplied to the automatic assembling apparatus by the feeder  46 , the units  44  are placed on the guide  46   a  of the feeder  46  with the back side thereof facing down, so that stepped portion  44   a   6  is supported by the guide stepped portion  46   a   1  a shown in FIG.  22 . By doing so, the directions of the memory units  44  and the facing orientations thereof are correctly determined. Therefore, as shown in FIG. 21, the units  44  can be supplied properly to the automatic assembling apparatus along the guide  46   a.  Thus, by the provision of the stepped portion  44   a   6  at one side of the unit  44 , the directions of the unit  44 , and the facing orientations can be properly controlled. 
     Thus, the automatic assembling can be accomplished. 
     Disposition of Memory Unit 
     As shown in FIGS. 3 and 4, the memory unit  44  is mounted on the cleaning unit C. The wireless communication is carried out while unit  44  is abutted to the antenna unit  41  provided in the main assembly  14  of the apparatus. The unit  44  is mounted by a double coated tape, an adhesive material, heat crimping, ultrasonic welding, a snap fit or the like such that it can be easily demounted from the cartridge B. The mounting of the unit  44  is strong enough to avoid unintended demounting, when the user touches the unit  44 , or when the cartridge B is mounted to the main assembly  14  of the apparatus. 
     (Memory unit mounting structure (center portion disposition of memory unit)) 
     When the wireless communication is carried out with the memory unit  44  abutted to the antenna unit  41  provided in the main assembly  14  of the apparatus, it is desirable that its position is such that wireless communication is not easily influenced by radio waves from another piece of electronic equipment (CRT or the like) placed in the neighborhood of the image forming apparatus A. 
     As shown in FIGS. 3 and 4, the memory unit  44  is disposed substantially at the center of the cleaning unit C (cartridge frame) in the longitudinal direction of the cartridge B (the axial direction of the photosensitive drum  7 ). When the cartridge B is inserted into the main assembly  14  of the apparatus, the unit  44  abuts the antenna unit  41  in the neighborhood of the center of the main assembly  14  of the apparatus, and the communication is carried out in this position shown in FIG.  1 . In other words, by mounting the unit  44  substantially at the center portion of the unit C in the longitudinal direction of the cartridge B, it is disposed at a position most remote from the outer casing surface of the main assembly  14  of the apparatus. As a result, even if another piece of electronic equipment is placed in the neighborhood of the image forming apparatus A, wireless communication is not easily influenced by the other piece of electronic equipment, thus minimizing the influence of the radio waves therefrom. 
     The unit  44  is substantially at the center of the unit C in the longitudinal direction of the cartridge B. Therefore, when the unit  44  is abutted to the unit  41 , the cartridge B can be smoothly inserted. More particularly, when the unit  44  is contacted to the unit  41 , or when the cartridge B is inserted into the main assembly  14  of the apparatus, the resistance against insertion is uniform in the longitudinal direction of the cartridge B. Therefore, the cartridge B can be smoothly mounted. (Structure of the memory unit mounting portion) 
     Referring to FIGS. 23-28, the structure of the mounting portion of the memory unit  44  will be described. 
     In order to recycle the cleaner frame  13  of the cartridge B (container recycling or material recycling), it is desirable that unit  44  is dismounted without damage to the cleaner frame  13 . This is because if the memory unit  44  containing the substrate unit  44   b  comprising the electrical part remains on the cleaner frame  13 , the container recycling or the material recycling of the cleaner frame  13  made of a resin material is difficult. 
     In view of this, in this embodiment, the memory unit mounting portion  13   k  is so constructed that memory unit  44  can be easily dismounted. In addition, the structure is such that unit  44  can be easily dismounted from the mounting portion  13   k.  The unit  44  is demountably mounted to the cleaner frame  13 . These embodiments will be described. 
     (First embodiment) 
     As shown in FIG. 23, the mounting portion  13   k  is provided on an inner surface facing a side surface of the unit  44  with an inclined surface  131  tool inserting portion for permitting insertion of a tool. The inclined surface  131  is expanded toward an inlet of the mounting portion  13   k  from a bottom surface of the mounting portion  13   k.  With this structure, the unit  44  can be easily dismounted from the inclined surface  131 . The unit  44  is mounted on the bottom surface of the mounting portion  13   k  by a double coated tape (bonding member). The memory unit  44  may be dismounted by a minus type screwdriver, for example. In the dismounting operation, the end of the minus type screwdriver is inserted between the bottom surface of the mounting portion  13   k  and the back side of the unit  44  along the inclined surface  131  of the mounting portion  13   k,  so that unit  44  is raised from the mounting portion  13   k.    
     Thus, the unit  44  is dismounted from the cleaner frame  13 . In order to prevent direct contact of the unit  44  to something during transportation and/or due to unintentional dropping upon mounting-and-demounting of the cartridge B, the surface of the unit  44  is stepped down from the surface of the cleaner frame  13 , or the cleaner frame  13  is made to cover a part of the surface of the unit  44 . 
     (Second embodiment) 
     As shown in FIGS. 24 (a) and (b), the recess functioning as a mounting. portion  13   k,  has a size slightly larger than that of the unit  44 . By doing so, there is provided a gap between the inner surface of the mounting portion  13   k  and the outer surface of the unit  44 . 
     A width  13   m  of the bottom surface on which the memory unit  44  is fixed is made a smaller than the width  13   n  of the memory unit  44 . By this, a tool inserting portion  13   u  in the form of a groove portion is provided to the insertion of the tool, around the bottom surface. The unit  44  is mounted on the bottom surface of the mounting portion  13   k  by a double coated tape. In the demounting operation, the end of the minus type screwdriver tool is inserted into the portion  13   u  of the mounting portion  13   k,  and the unit  44  is raised from the bottom surface of the mounting portion  13   k  using a lever function. 
     By doing so, the unit  44  is dismounted from the cleaner frame  13 . 
     As shown in FIGS. 25 (a) and (b), the mounting portion  13   k  is provided with a recesses  13   v  (stepped portion) tool inserting portion in order to permit insertion of the tool to a part of the inner surface opposed to the opposite ends of the unit  44 . The recesses  13   v  are formed toward the cleaner frame  13 . The unit  44  is mounted on the bottom surface of the mounting portion  13   k  by a double coated tape. In the demounting operation, the end of the minus type screwdriver tool is inserted into recess  13   v,  and the unit  44  is raised from the bottom surface of the mounting portion  13   k  using a lever function. By doing so, the unit  44  is dismounted from the cleaner frame  13 . 
     As shown in FIG. 26, the mounting portion  13   k  is provided with a rib  13   r  tool inserting portion to permit insertion of the tool to the bottom surface facing the back side of the unit  44 . The rib  13   r  is projected from the bottom surface of the mounting portion  13   k,  and forms a grid-like pattern. By the provision of such a grid-like pattern, the contact area relative to the unit  44  can be made smaller, thus accomplishing easy demounting of the unit  44 . The unit  44  is mounted on the grid-like rib  13   r  of the mounting portion  13   k  by a double coated tape. In the demounting operation, the minus type screwdriver tool is inserted into the space between the portions of the rib  13   r  to which the unit  44  is mounted, and the unit  44  is raised from the bottom surface of the mounting portion  13   k  using a lever function. Thus, the unit  44  is dismounted from the cleaner frame  13 . 
     (Third embodiment) 
     In this embodiment, the memory unit is provided with means for permitting dismounting of the memory unit from the cleaner frame  13 . FIG. 27 shows a memory unit according to this embodiment of the present invention. As shown in FIG. 27, the memory unit  44  is provided with an inclined portion  13   s  tool inserting portion to permit insertion of a tool to a corner portion at the bottom side of the mounting portion  13   k  provided in the cleaner frame  13 . The inclined portion  13   s  is beveled. The unit  44  is mounted on the bottom surface of the mounting portion  13   k  by a double coated tape. 
     In the demounting operation, an end of the minus type screwdriver tool is inserted to the inclined portion  13   s,  and the unit  44  is raised from the bottom surface of the mounting portion  13   k  using a lever function. Thus, the unit  44  is dismounted from the cleaner frame  13 . 
     (Fourth embodiment) 
     In this embodiment, the memory unit  44  is detachably mountable on the cleaner frame  13 . FIG. 28 shows a structure of a memory unit mounting portion using a snap-fit. The memory unit  44  is provided with a snap  13   t   1  in the form of an elastic segment constituting a part of the snap fitting  13   t  structure. The cleaner frame  13  is provided with the mounting portion  13   k,  a locking hole  13   t   2 , which is a locking portion structuring a part of the snap fitting  13   t,  and an insertion groove (tool inserting portion)  13   t   3  for permitting a screwdriver tool to engage the snap  13   t   1  from the locking hole  13   t   2 . When the unit  44  mounted to the cleaner frame  13 , the unit  44  is engaged into the mounting portion  13   k  to bring the snap  13   t   1  into engagement with the locking hole  13   t   2 . When the unit  44  is dismounted from the cleaner frame  13 , an end of the screwdriver is inserted into the groove  13   t   3  to press the snap  13   t   1  locked with the locking hole  13   t   2  to release the engagement with the locking hole  13   t   2 . By doing so, the unit  44  can be dismounted from the cleaner frame  13 . 
     (Fifth embodiment) 
     The mounting of the memory unit  44  to the cleaner frame  13  is not limited to the use of the double coated tape. For example, an adhesive material, heat crimping, ultrasonic welding or the like are usable. What is required is that unit  44  is easily dismounted from the mounting portion  13   k  of the cleaner frame  13  using a tool or another element. 
     Using the structure shown in FIGS. 23-28, the memory unit  44  can be dismounted without damage to the cleaning frame  13 . Thus, the container recycling and/or material recycling of the cleaner frame  13 , namely, recycling thereof is enabled. 
     (Structure for protection of memory unit) 
     Referring to FIGS. 29 to  33 , a description will be provided as to a structure for protection of the memory unit  44 . FIG. 29 is a perspective view of a cartridge having a recess for protection of the memory unit, FIG. 30 is a sectional view of the cartridge shown FIG. 29, FIG. 31 is an illustration of protection of the memory unit, FIG. 32 is a perspective view of a cartridge having a projection for protection of the memory unit, and FIG. 33 is a sectional view of the cartridge shown in FIG.  32 . 
     The storing element  44   b   1  of the unit  44  stores information for execution of an image forming operation of the image forming apparatus A. Therefore, for the purpose of desirable correction of the image forming operation of the image forming apparatus A, the unit  44  must be without defects or problems. One of the causes of problems or defects of the unit  44  is a shock or impact to the unit  44 . In order to avoid such a shock, it is desirable to provide a structure for protection of the unit  44 . 
     As shown in FIG. 29, according to this embodiment, a protection recess  13   f  is provided at a position where the antenna unit  41  faces the cleaner frame  13  of the cleaning unit C to protect the memory member. More particularly, the recess  13   f  is disposed substantially at the center of the cleaner frame  13  facing the antenna unit  41  when the cartridge B is inserted in the longitudinal direction of the cartridge B to be mounted to the main assembly  14  of the apparatus. The depth of the recess  13   f  is larger than the thickness of the unit  44 . The memory unit  44  is disposed in the recess  13   f.  The bottom surface of the recess  13   f  is provided with the mounting portion  13   k  previously described, and the unit  44  is mounted on the mounting portion  13   k  using a double coated tape or another method. The recess  13   f  is larger in the longitudinal direction of the cartridge B than the size of the antenna unit  41 . Therefore, when the cartridge B is mounted to the main assembly  14 , the antenna unit  41  can enter the recess  13   f.    
     Accordingly, part of the leading side surface  41   d  of the antenna unit  41  is contacted to the whole surface of the leading side surface  44   a   8  of the memory unit  44  mounted in the recess  13   f.  Thus, when the cartridge B is mounted to the main assembly  14  of the apparatus, the memory unit  44  is abutted to the antenna unit  41  at the leading side with respect to the mounting direction X 1 . The distance between the antenna  41   c,    44   b   2  of the memory unit  44  and the antenna unit  41  is maintained by the abutment between the surfaces  41   d,    44   a   8  and by a function of an equalizer mechanism  70 . Here, the leading side surface  41   d  of the unit  41  is such a surface as is faced frontward when the cartridge B is mounted in the mounting direction X 1 . More particularly, the leading side surface  41   d  is the surface which is disposed downstream (rear side) with respect to the mounting direction X 1 . The leading side surface  44   a   8  of the memory unit  44  is the surface which is disposed at the leading side in the mounting direction X 1  when the cartridge B is mounted to the main assembly  14  of the apparatus. The leading side surface  44   a   8  of the memory unit  44  is the upstream side front side surface with respect to the mounting direction X 1 . 
     When the leading side surface  44   a   8  is not flat as in this embodiment, namely, when the leading side surface is a projection or a recess, the projected portion on the leading side surface  44   a   8  is brought into contact with the leading side surface  41   d.    
     By the contact, the distance between the antenna  41   c  and the antenna  44   b   2  is determined. 
     By disposing the unit  44  in the recess  13   f  of the cleaner frame  13 , the unit  44  can be protected from the direct impact to the unit  44 . As shown in FIG. 31, for example, even if the cleaning unit C of the cartridge B hits a corner of a desk  90 , the unit  44  is not subjected to a direct impact since the unit  44  is provided in the recess  13   f  of the cleaner frame  13 . Therefore, the frame member  44   a  of the unit  44  and therefore the information written in the storing element  44   b   1  are protected from damage. 
     As shown in FIGS. 32 and 33, a rib  13   g  (protecting projection) may be provided so as to enclose the outer periphery of the unit  44  to protect the memory member at a position where the cleaner frame  13  is opposed to the unit  41 . The height of the rib  13   g  is larger than the thickness of the memory unit  44 . By the provision of the rib  13   g  which encloses the outer periphery of the unit  44 , and by disposing the unit  44  in the area enclosed by the rib  13   g,  the unit  44  is protected. 
     In this embodiment, when the cartridge B is mounted to the main assembly  14  of the apparatus, the antenna unit  41  enters the area enclosed with the rib  13   g.  By doing so, the memory unit  44  and the antenna unit  41  are abutted to each other. 
     As described in the foregoing, the unit  44  is detachably mounted to the mounting portion  13   k  provided in the cleaner frame  13  with a proper mounting means such as a double coated tape. Accordingly, the unit  44  is prevented from disengaging from the cleaning unit C upon contact to the unit  41 . 
     III. Abutting structure between memory unit and antenna unit 
     In order to accomplish the wireless communication while the antenna unit  41  and the memory unit  44  are contacted to each other, it is desirable that antenna  41   c  and the antenna  44   b   2  are opposed to each other with high accuracy. 
     In this embodiment, as shown in FIG. 34, the main assembly  14  of the apparatus is provided with an equalizer mechanism  70  which functions as a positioning means. The unit  41  is held rotatably on an antenna unit supporting member  42  of the equalizer mechanism  70 . 
     As shown in FIGS. 34 and 35, the unit  41  includes an antenna  41   c  and an antenna cover  41   a  functioning as an outer casing member covering the antenna  41   c.  The unit  41  is provided with the antenna cover  41   a  so as to be rotatable about a supporting shaft  41   b.  The supporting member  42  is mounted on the main assembly  14  of the apparatus, for rotation about the supporting shaft  42   a.  The supporting member  42  is supported by an electroconductive spring member  43  which is locked to the main assembly  14  of the apparatus at the other end thereof. The supporting member  42  is urged by the elastic force tension of the spring  43  in the direction toward the insertion path  55  for the cartridge B in the arrow F direction about the supporting shaft  42   a.  Thus, when the cartridge B is not mounted in the main assembly  14  of the apparatus, the unit  41  is placed in the insertion path of the cartridge B by the supporting member  42 . By this, when there is no cartridge B, the unit  41  is at a position within a region in which the memory unit  44  is present when the cartridge B is mounted to the main assembly of the apparatus (the region is the one occupied by the unit  44  when the cartridge B is completely inserted into the main assembly  14  of the apparatus). 
     As shown in FIG. 34, when the cartridge B is inserted into the main assembly  14  of the apparatus, the unit  41  enters the recess  13   f  of the cartridge B. When the cartridge B is further inserted, the supporting member  42  rotates about the supporting shaft  42   a  in the direction of insertion of the cartridge B with the insertion of the cartridge B. Then, the unit  41  is retracted from the insertion path of the cartridge B. As described hereinbefore, the unit  41  is abutted to the unit  44  when the cartridge B is completely inserted into the main assembly  14  of the apparatus as shown in FIG.  35 . At this time, as described hereinbefore, the unit  41  is equalized so that abutment surfaces, e.g., the leading side surfaces  41   d,    44   a   8  of the unit  41  and the unit  44  are parallel with each other, since the unit  41  is rotatable about the supporting shaft  41   b.  By this, the unit  41  is aligned with the position of the unit  44  so that its position is determined so as to be opposed to the unit  44 . In other words, the whole surface of the abutment surface of the memory unit  44 , e.g., the leading or front side surface  44   a   8  is abutted to a part of the abutment surface front or leading side surface  41   d  of the antenna unit  41 . 
     With this structure, when the cartridge B is mounted to the main assembly  14  of the apparatus, the unit  41  and the unit  44  are correctly positioned relative to each other with high precision. Therefore, the antenna  41   c  and the antenna  44   b   2  are opposed to each other with high precision. 
     The positioning relative to the main assembly  14  of the apparatus of the cartridge B is effected by the regulating abutment  13   j  provided on the upper surface  13   i  of the cleaning unit C and the cylindrical guides  13   a R,  13   a L provided on the cleaning unit C. Therefore, by mounting the memory unit  44  to the cleaning unit C, the unit  44  is correctly positioned in the longitudinal direction and in the direction perpendicular thereto relative to the antenna unit  41  provided in the main assembly  14  of the apparatus. 
     In this embodiment, the antenna unit  41  is rotatable. However, it is an alternative that memory unit  44  is rotatable. More specifically, the memory unit  44  is made rotatable by providing an elastic member such as a spring, a sponge, a rubber material or the like between the memory unit  44  and the cleaning unit C. 
     IV. Wireless communicating mechanism 
     Referring to FIGS. 1,  7 ,  8 ,  36 , and  37 , a description will be provided as to the structure of the wireless communicating mechanism. 
     (General arrangement of the wireless communicating mechanism) 
     The wireless communicating mechanism comprises a communicating unit  47  and a memory unit  44 . 
     The unit  47 , as described hereinbefore, comprises an antenna unit  41 , a unit  45  for controlling the unit  41  and an equalizer mechanism  70  (FIGS. 7,  8 ). The unit  41  and the unit  45  are electrically connected by a signal line  45   a.  The unit  41  comprises an antenna substrate  41   c  and an antenna cover  41  a as an outer casing member covering the antenna substrate  41   c.  The material of the antenna cover  41   a  is selected from such materials as have a physical strength against the abutment to the memory unit  44  and as have a sufficient electrostatic shield property (dielectric constant  2 - 5  desirably). This means that material may be the same as the material of the frame member  44   a  of the memory unit  44 . 
     The unit  41  is urged to be positioned in the insertion path  55  of the cartridge B by the supporting member  42 , and is positioned by abutment to the memory unit  44 . The writing of the information into the memory unit  44  and the reading of the information from the memory unit  44  are carried out in response to instructions from the controlling unit  48  shown in FIG. I by the communication controlling unit  45  acting on the memory unit  44  through the antenna unit  41 . 
     (urging mechanism for antenna unit, and positioning mechanism therefor) 
     Referring to FIGS. 36 and 37, a description will be provided as to the urging mechanism and the positioning mechanism for the antenna unit. 
     In FIG. 36, designated by  50  is a main assembly frame provided in the main assembly  14  of the apparatus. The main assembly frame  50  has main assembly supporting members  50   a,    50   b  which are opposed to each other in the longitudinal direction of the cartridge B. On the supporting members  50   a,    50   b,  the supporting shaft  42   a  of the supporting member  42  is supported rotatably. The supporting member  42  comprises supporting portions  42   b,    42   c  for supporting the unit  41  and a connecting portion  42   d  for connecting the supporting portions  42   b,    42   c.  It is substantially in the form of a channel. The supporting portions  42   b,    42   c  penetrate holes  50   c,    50   d  formed in the main assembly frame  50 . 
     The supporting member  42  is positioned so as to be immovable in the longitudinal direction of the cartridge B by one of the supporting portions  42   c  being placed in the gap  50   f  formed between the projections  50   e  which are provided substantially at a center of the hole  50   d.  The connecting portion  42   d  of the supporting member  42  is provided with a locking segment  42   d   1  with which a hook  43   a  of a spring  43  is engaged. The other end  43   b  of the spring  43  is sank into the lower surface of the main assembly frame  50  so that it is fixed to the main assembly frame  50 . The other end  43   b  of the spring  43  is connected with a grounding portion of the main assembly  14  of the apparatus using an electroconductive lead or line  49 . In this manner, by connecting the ends of the spring  43  with the supporting member  42  and the main assembly frame  50 , an elastic force tension for urging the supporting member  42  toward the insertion path  55  of the cartridge B is provided. Here, the spring  43  is composed of electroconductive material and is electrically grounded through the electroconductive lead  49 . 
     Therefore, it functions as a conductor rod against static electricity. 
     As shown in FIG. 37, the supporting portions  42   b,    42   c  of the supporting member  42  rotatably support the antenna unit  41  by the supporting shaft  41   b.  The unit  41  is supported by the supporting member  42  urged by the spring  43 , so that it is in the insertion path  55  of the cartridge B when there is no cartridge B. The unit  41  is provided with a pair of hooks  41   z  at a side of the cartridge B opposite from the insertion path  55 . These hooks  41   z  are provided on the antenna cover  41   a.  These hooks  41   z  are engaged with projections  51  of the main assembly frame  50 , when the antenna unit  41  is in the insertion path  55  of the cartridge B supported by the supporting member  42 . Thus, the hook  41   z  functions as a stopper against rotational motion of the supporting member  42  in the direction indicated by an arrow F in FIG.  7 ). The antenna cover  41   a  is substantially in the form of a box, and covers the antenna substrate  41   c  to protect it. The signal line  45   a  connecting the controlling unit  45  and the antenna substrate  41   c  of the unit  41  electrically connects them through a window  41   a   2  formed in the cylindrical portion  41   a   1  constituting a part of the antenna cover  41   a.    
     With the communicating unit  47  having the equalizer mechanism  70  having the above-described structure, the antenna unit  41  is in the insertion path  55  of the cartridge B when the cartridge B is not mounted to the main assembly  14  of the apparatus. When the cartridge B is inserted into the main assembly  14  of the apparatus, the unit  41  is brought into abutment the unit  44 . At this time, the unit  44  is rotatably supported, and the supporting member  42  is rotatably supported by the supporting shaft  42   a.  Therefore, with the further insertion of the cartridge B, it is retracted from the insertion path  55 . With the cartridge B completely inserted into the main assembly  14  of the apparatus, the unit  41  is rotated, and the supporting shaft  41   b  follows the unit  44 . By this, the antenna unit  41  is abutted to the surface of the memory unit  44  such that surfaces of them are parallel to each other. In this manner, the facing positions of the antenna unit  41  and the memory unit  44  are determined. (Another example 1 of urging mechanism and positioning mechanism for the antenna unit) 
     FIG. 38 shows an urging mechanism and a positioning mechanism for the antenna unit according to another example of the present invention. FIG. 38 is an enlarged view of the contact portions between the memory unit  44  and the antenna unit  41 . 
     In this embodiment, an elastic member  60  is provided between the main assembly frame  50  and the antenna unit  41 , in place of the equalizer mechanism  70 . One side of the elastic member  60  is bonded to the main assembly frame  50 , and the opposite side is bonded to the antenna cover  41   a.  When the cartridge B is removed from the main assembly  14  of the apparatus, the elastic member  60  becomes free. By this, the antenna unit  41  is kept in an inserted state in the insertion path of the cartridge B by the elastic member  60 , when the cartridge B is not mounted to the main assembly  14  of the apparatus. When the cartridge B is inserted into the main assembly  14  of the apparatus, the unit  41  is abutted to the unit  44  so that elastic member  60  is compressed, by which the unit  41  is kept contacted to the unit  44  so that units  41  and  44  are parallel with each other. That is, with the cartridge B completely inserted into the main assembly  14  of the apparatus, the antenna unit  41  correctly faces the memory unit  44 . 
     (Another example 2 of urging mechanism and positioning mechanism for the antenna unit) 
     FIG. 39 shows an urging mechanism and a positioning mechanism for the antenna unit according to a further example. FIG. 39 is an enlarged view of the contact portions between the memory unit  44  and the antenna unit  41 . 
     According to this embodiment, the antenna unit  41  and the memory unit  44  can be abutted to each other without imparting an additional force against the positioning motion of the cartridge B. 
     As described in the foregoing, the positioning of the cartridge B relative to the main assembly  14  of the apparatus, is accomplished by the regulating abutment  13   j  and the cylindrical guides  13   a R,  13   a L. Namely, the cartridge B is supported by the cylindrical guides  13   a R,  13   a L provided coaxially with the photosensitive drum  7 , by which the cartridge B is partly positioned relative to the main assembly  14  of the apparatus. The photosensitive drum  7  receives torque in the direction T from the main assembly  14  of the apparatus. By this, the neighborhood of the memory unit  44  provided on the upper surface of the cleaning unit C is urged in the direction M. Therefore, the position of the cartridge B is determined in the direction of the axis of the photosensitive drum  7  in the plane of this figure. In the rotational direction (M direction), the cartridge B is positioned by abutment of the cleaning unit C to a rotation stopper  53  of the main assembly frame  50 . In this example, the antenna unit  41  is disposed at the rotation stopper  53 . 
     By doing so, the antenna unit  41  and the memory unit  44  are abutted to each other without additional force against the positioning of the cartridge B. 
     In this embodiment, the equalizer mechanism  70  is provided in the main assembly  14  of the apparatus, but an equalizer mechanism having the same function may be provided in the cartridge B. For example, in the case that antenna unit  41  is fixed to the main assembly  14  of the apparatus, the unit  44  may be mounted to the cleaning unit C with an equalizer mechanism therebetween such that position of the memory unit  44  is determined to be aligned with the antenna unit  41 . By this, when the cartridge B is completely inserted into the main assembly  14  of the apparatus, the unit  44  correctly faces the unit  41 . 
     With the use of the wireless communicating mechanism described in the foregoing, the memory unit  44  is contacted by the antenna cover  41   a  functioning as a minimum necessary protection layer in physical strength and the durability against electrostatic failure and by the frame member  44   a.  Therefore, the electric power required for the wireless communication can be minimized, so that assured wireless communication is accomplished with low power. This eliminates the necessity for a shield for preventing leakage of radio waves. Thus, the power required by the wireless communication is minimized. In addition, since low power is sufficient, electric energy consumption is saved, and therefore, the electric circuit may be small and inexpensive. 
     In the case that a wireless communicating mechanism is used in an electrophotographic image forming apparatus A, the provision of the abutment portion for abutment between the memory unit  44  mounted to the cartridge B and a part 
     (antenna unit  41  in this embodiment) of the communicating unit  47  provided in the main assembly  14  of the apparatus, is effective to assure the abutment between the communicating unit  47  and the memory unit  44  without disturbing the positioning of the cartridge B. Therefore, reading and writing of the necessary information can be accomplished with high precision. By supporting the antenna unit  41  with a mechanism permitting swing equalization, the abutment relative to the memory unit  44  is assured with minimum contact pressure. Therefore, the communication is assured without disturbing the positioning of the cartridge B. 
     The communicating unit  47  is separated into two bodies, namely, the antenna unit  41  and the controlling unit  45 . Therefore, the antenna unit  41  can be closely contacted to the memory unit  44  with a weak force. Thus, the relative positioning between the memory unit  44  and the antenna unit  41  is accomplished without deteriorating the positioning accuracy and the mounting-and-demounting operability of the cartridge B. Since the relative positional accuracy between the memory unit  44  and the antenna unit  41  is assured to be high, the power intensity of the electro-magnetic field can be minimized. By doing so, the wireless communication is accomplished with such a low power as does not require a magnetic shield. When the antenna unit  41  is exposed at a position contacting the detachably mountable cartridge B, a static stopper is desired, but because of the two-body structure, what is required is only to cover the antenna unit  41 . Therefore, the required cost is low. 
     The antenna unit  41  is capsuled in an electrostatically safe box form. 
     Therefore, the latitude of arrangements in the main assembly  14  of the apparatus is enhanced, and the antenna unit may be disposed at an exposed position subjected to contact by the user. Therefore, the memory unit  44  and the antenna unit  41  can be contacted to each other. Because the contact of the antenna unit  41  is accomplished, the power required for the communication is minimized such that a magnetic shield or the like is unnecessarily. When the shield is required, the usage of the wireless communicating mechanism is very much limited. The lack of necessity of the shield permits cost a reduction. In addition, the wireless communicating mechanism can be used in the limited space in the main assembly  14  of the apparatus. In addition, since the required power is small, the electric energy consumption can be decreased and the electric circuit can be minimized. Since contact is sufficient without requiring insertion as with the case of a connector, the mounting-and-demounting operability of the cartridge B is not deteriorated. 
     In the embodiment, the antenna unit  41  is in the form of a box type capsule which is electrostatically safe, but the entirety of the communicating unit  47  may be in the form of a box type capsule which is electrostatically safe. 
     The spring  43  disposed adjacent the antenna unit  41  is made of electroconductive material, and has an end  43   b  which is electrically grounded through the electroconductive line  49 . Therefore, the spring  43  functions as a conductor rod. Therefore, even if the withstand voltage of the antenna cover  41   a  for protecting the antenna unit  41  is low, the electric discharge from the body of the user would not directly attack the unit  41 . Therefore, the durability against electrostatic failure is high. Therefore, the antenna unit  41  can be provided at such a position that when the detachably mountable cartridge B is dismounted from the main assembly  14  of the apparatus, the antenna unit  41  may be touched by a user&#39;s hand. This means that it can be disposed closest to the cartridge B. Because of the permissible low withstand voltage of the antenna cover  41   a,  the antenna cover  41   a  may be thin, or it may be constructed using a joint and/or a fitting. Therefore, the ease-of-assembly property of the antenna unit  41  is improved with the result of a cost saving. The antenna unit  41  is abutted to the cartridge B by the electrically grounded spring  43 , which is an electroconductive member. Therefore, no additional force is imparted to the antenna unit  41 , and therefore, the cartridge B can be inserted smoothly. Additionally, the necessity for an urging spring adjacent the antenna unit  41  can be eliminated. Therefore, the electrical interference due to the urging spring can be avoided. 
     The embodiments described in the foregoing are summarized as follows. 
     A unit (feeding unit  3   a , fixing unit  5 , developing unit) detachably mountable to a main assembly ( 14 ) of an electrophotographic image forming apparatus for forming an image on a recording material, comprises: 
     (a) a unit frame (cartridge frame); and 
     (b) a memory member (memory unit  44 ) supported by the unit frame (cartridge frame), the memory member (memory unit  44 ) including: 
     a base (base plate  44   b   3 ); 
     a storing element ( 44   b   1 ), provided on the base (base plate  44   b   3 ), for storing information; 
     a memory antenna (communication antenna  44   b   2 ), provided in the base (base plate  44   b   3 ), for sending the information stored in the storing element ( 44   b   1 ) to a main assembly antenna ( 41   c ) provided in a main assembly of the apparatus, when the memory member (memory unit  44 ) is mounted to the main assembly of the apparatus; 
     a sending member (communication circuit  44   b   11 ), provided in the base (base plate  44   b   3 ), for sending the information stored in the storing element ( 44   b   1 ) to the memory antenna (communication antenna  44   b   2 ); and 
     an outer casing member (frame member  44   a ) covering the substrate provided with the storing element ( 44   b   1 ), the sending member (communication circuit  44   b   11 ) and the memory antenna (communication antenna  44   b   2 ), 
     wherein the memory member (memory unit  44 ) is disposed substantially at a central portion of the unit frame (cartridge frame) with respect to a direction crossing with a mounting direction in which the unit is mounted to the main assembly of the apparatus. 
     It may be that the unit frame (cartridge frame) is provided with a recess ( 13   f ) or a projection ( 13   g ) for protecting the memory member, and the memory member (memory unit  44 ) is provided in the recess ( 13   f ) or surrounded by the projection ( 13   g ). 
     A process cartridge (B) detachably mountable to a main assembly of an electrophotographic image forming apparatus for forming an image on a recording material, comprises: 
     (a) an electrophotographic photosensitive member ( 7 ); 
     (b) process means (charging means  8 , developing means  9 , cleaning means  10 ) actable on the electrophotographic photosensitive member ( 7 ); 
     (c) a cartridge frame (cleaning frame  13 ); and 
     (d) a memory member (memory unit  44 ) supported by the unit frame (cartridge frame), the memory member (memory unit  44 ) including: 
     a base (base plate  44   b   3 ); 
     a storing element ( 44   b   1 ), provided on the base (base plate  44   b   3 ), for storing information; 
     a memory antenna (communication antenna  44   b   2 ), provided on the base (base plate  44   b   3 ), for sending the information stored in the storing element ( 44   b   1 ) to a main assembly antenna ( 41   c ) provided in the main assembly of the apparatus when the process cartridge (B) is mounted to the main assembly of the apparatus; 
     a sending member (communication circuit  44   b   11 ), provided in the base (base plate  44   b   3 ), for sending the information stored in the storing element ( 44   b   1 ) to the memory antenna (communication antenna  44   b   2 ); and 
     an outer casing member (frame member  44   a ) covering the base (base plate  44   b   3 ) provided with the storing element ( 44   b   1 ), the sending member (communication circuit  44   b   11 ) and the memory antenna (communication antenna  44   b   2 ), 
     wherein the memory member (memory unit  44 ) is disposed substantially at a central portion of the unit frame (cartridge frame) with respect to a direction crossing with a mounting direction in which the process cartridge (B) is mounted to the main assembly of the apparatus. 
     It maybe that the process cartridge (B) is provided with a recess ( 13   f ) or a projection ( 13   g ) for protecting the memory member, and the memory member (memory unit  44 ) is provided in the recess ( 13   f ) or surrounded by the projection ( 13   g ). 
     It may be that the recess ( 13   f ) has a depth which is larger than the thickness of the memory member. 
     It may be that the memory member (memory unit  44 ) is disposed adjacent a leading end of the unit frame (cartridge frame) with respect to the mounting direction. 
     It may be that the memory member (memory unit  44 ) is detachably mounted to the process cartridge. 
     It may be that the process cartridge (B) has a mounting portion ( 13   k ) for detachably mountable the memory member, and the mounting portion ( 13   k ) is provided with a tool inserting portion (recess  13   u,    13   v ) for permitting insertion of a tool to dismount the memory member (memory unit  44 ) from the mounting portion ( 13   k ). 
     It may be that the mounting portion ( 13   k ) is in the form of a recess ( 13   f ) engageable with the memory member, and the tool inserting portion (recess  13   u,    13   v ) includes a tapered portion ( 13   l ) which expands toward an entrance portion of the recess from a bottom portion of the recess and which is formed in a part of an inner surface of the recess. 
     It may be that the mounting portion ( 13   k )is in the form of a recess engageable with the memory member, and the recess is provided in a bottom surface with a groove portion as the tool inserting portion (recess  13   u,    13   v ). 
     It may be that the mounting portion ( 13   k ) is in the form of a recess engageable with the memory member, and the recess is provided in a part of an inner surface thereof with a stepped portion as the tool inserting portion (recess  13   u,    13   v ). 
     It may be that the mounting portion ( 13   k ) is in the form of a recess engageable with the memory member, and the recess is provided on a bottom surface thereof with a rib ( 13   r ) extending from the bottom surface to form the tool inserting portion (recess  13   u,    13   v ). 
     It may be that the process cartridge (B) is provided with a mounting portion ( 13   k ) for demountably mounting the memory member, the mounting portion ( 13   k ) is in the form of a recess engageable with the memory member, wherein the memory member (memory unit  44 ) demountably mounted to the recess has an inclined portion for permitting insertion of a tool at a comer portion adjacent a bottom surface of the recess. 
     It may be that the memory member (memory unit  44 ) is demountably mounted to the mounting portion ( 13   k ) with a bonding material. 
     It may be that the bonding material is a double coated tape. 
     It may be that the outer casing member (frame member  44   a ) is provided with a regulating portion ( 44   a   5 ) for regulating the memory member (memory unit  44 ) when it is mounted. 
     It may be that the outer casing member (frame member  44   a ) is provided with a of corner portions ( 44   a   7 ), one of which functions as the regulating portion ( 44   a   5 ). 
     It may be that the regulating portion ( 44   a   5 ) is a beveled portion of the corner portion. 
     It may be that the unit is a fixing unit for fixing on the recording material a age transferred onto it, a developing unit for developing an electrostatic latent image formed on an electrophotographic photosensitive member ( 7 ), or a feeding unit dating the recording material. 
     (Other embodiments) 
     In the foregoing, a description has been provided with respect to embodiments in which the wireless communicating mechanism comprising the communicating unit and the memory unit is used in a cartridge, but this usage is not limiting. It is applicable to a feeding cassette for accommodating recording materials in the main body unit frame of the cassette, if the feeding cassette is demountable from the main assembly of the apparatus. It is also applicable to a fixing unit comprising a unit frame, a pressing roller and a fixing roller which are supported by the unit frame to fix toner images on recording materials if the fixing unit is demountable from the main assembly of the apparatus. It is also preferably applicable to a developing unit comprising a unit frame, a developer container and developing means which are supported by the unit frame to develop electrostatic latent images formed on the electrophotographic photosensitive member with a developer, if the developing unit is detachably mountable to the main assembly of the apparatus. Therefore, the unit to which the present invention is applicable includes a feeding cassette, a fixing unit and a developing unit. 
     The process cartridge B to which the present invention is applicable is not limited to a process cartridge for formation of the monochromatic image, but may be a color cartridge for formation of a multicolor image (two-color images, three-color images, full-color images or the like) using a plurality of developing means. 
     In the above-described embodiments, the electrophotographic photosensitive member has been described as a photosensitive drum, but the electrophotographic photosensitive member is not limited to such a photosensitive drum, and the following is usable. The photosensitive member may be a photoconductor which may be an amorphous silicon, amorphous selenium, zinc oxide, titanium oxide, organic photoconductor (OPC) or the like. The photosensitive member may be in the form of a drum, a belt or another rotatable member, or a sheet, or the like. Generally, however, a drum or a belt is used, and in the case of a drum type photosensitive member, a cylinder of aluminum alloy or the like is coated with a photoconductor by evaporation or application or the like. 
     Also, the present invention is preferably usable with various known developing methods such as the magnetic brush developing method using two component toner, the cascade developing method, the touch-down developing method, the cloud developing method. 
     The structure of the charging means described in the foregoing is of a so-called contact type charging method, but a known charging means comprising a tungsten wire, which is an enclosed width metal shield of aluminum or the like at three sides, wherein positive or negative ions generated by application of a high voltage to the tungsten wire are directed to the surface of the photosensitive drum to uniformly charged the surface, is usable. 
     The charging means may be a roller type as described in the foregoing, a blade type (charging blade), a pad type, a block type, a rod type, a wire type or the like. 
     As for a cleaning method for removing toner remaining on the photosensitive drum, a blade, a furbrush, a magnetic brush or the like is usable. 
     The process cartridge, for example, comprises an electrophotographic photosensitive member and at least one process means. As for the types of the process cartridge, there are, in addition to those disclosed hereinbefore, a type in which, for example, an electrophotographic photosensitive member and charging means are unified integrally into a cartridge which is detachably mountable to the main assembly of the electrophotographic image forming apparatus; a type in which an electrophotographic photosensitive member and developing means are unified integrally into a cartridge which is detachably mountable to a main assembly of apparatus; a type in which an electrophotographic photosensitive member and cleaning means are unified integrally into a cartridge which is detachably mountable to a main assembly of an electrophotographic image forming apparatus; and a type in which an electrophotographic photosensitive member and two or more of the process means are combined integrally into a cartridge which is detachably mountable to a main assembly of an electrophotographic image forming apparatus. 
     The process cartridge may integrally contain an electrophotographic photosensitive drum, and charging means, developing means or cleaning means, in the form of a unit or a cartridge, which is detachably mountable to a main assembly of an image forming apparatus. The process cartridge may integrally contain an electrophotographic photosensitive drum, and at least one of charging means, developing means and cleaning means, in the form of a unit or a cartridge, which is detachably mountable to a main assembly of an image forming apparatus. Furthermore, the process cartridge may contain at least the electrophotographic photosensitive drum and the developing means, in the form of a unit or a cartridge, which is detachably mountable to a main assembly of an image forming apparatus. The process cartridge is mounted to or demounted from the main assembly of the apparatus by the user. This means that maintenance of the apparatus is carried out, in effect, by the user. 
     In the foregoing embodiments, a laser beam printer has been taken as an example of the electrophotographic image forming apparatus, but the present invention is not limited thereto, and the present invention is applicable to an electrophotographic copying machine, a facsimile machine, a facsimile machine or the like of an electrophotographic type. 
     As described in the foregoing, according to the present invention, a unit having a memory member capable of wireless communication is provided. Additionally, the present invention provides a process cartridge having a member capable of wireless communication. 
     Furthermore, the present invention provides an electrophotographic image apparatus to which a unit having a memory member capable of wireless cation is detachably mountable. 
     Moreover, the present invention provides an electrophotographic image apparatus to which a process cartridge having a memory member capable of communication is detachably mountable. 
     While the invention has been described with reference to the structures d herein, it is not confined to the details set forth and this application is to cover such modifications or changes as may come within the purpose of the improvements or the scope of the following claims.