JP2012014158A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming device having cartridge pressing means and LED unit pressing means, and solving a problem of an increase in power necessary for opening/closing an external cover when the cartridge pressing and the LED pressing are simultaneously performed in conjunction with the external cover.SOLUTION: Toggle mechanisms 93 and 121 are used for switching a pressing state and a press-release state. The respective pressing timing is altered, and therefore the power necessary for door opening/closing is small compared with the simultaneous pressing. That is, the respective pressing timing is altered, and therefore the peaks of reaction forces received at the door from a lever 91K and a lever 120 of the toggle mechanisms 93 and 121 via a rod 80 are generated at a different timing. Thus, the maximum value of operation power necessary for door opening/closing is decreased compared with the case where the peaks are generated simultaneously. This provides a device with improved usability.

Description

  The present invention relates to an image forming apparatus for forming an image on a recording medium in a state in which a process cartridge having an electrophotographic photosensitive drum and process means acting on the drum is detachably mounted on the apparatus main body of the image forming apparatus. Electrophotographic image forming apparatus).

  Here, the electrophotographic image forming apparatus forms an image on a recording medium using an electrophotographic image forming process. Examples of the electrophotographic image forming apparatus include an electrophotographic copying machine, an electrophotographic printer (for example, a laser beam printer, an LED printer, etc.), a facsimile apparatus, a word processor, and the like. The recording medium is an image on which an image is formed by an electrophotographic image forming apparatus, and includes, for example, paper, an OHT sheet, and the like.

  The process cartridge contributes to an image forming process for forming an image on a recording medium in a state in which the process cartridge is detachably attached to the main body of the electrophotographic image forming apparatus. The apparatus main body is a component part of the electrophotographic image forming apparatus excluding the cartridge. The process cartridge is a cartridge in which at least one of a charging unit, a developing unit, and a cleaning unit as a process unit and an electrophotographic photosensitive drum on which an electrostatic latent image is formed are integrated into a cartridge and can be detached from the apparatus main body. It is to be attached. The process means acts on the electrophotographic photosensitive drum.

  Accordingly, the process cartridge includes one in which the developing means as the process means and the electrophotographic photosensitive drum are integrally formed into a cartridge and detachably attached to the apparatus main body. The process cartridge includes a cartridge in which a charging unit, a developing unit or a cleaning unit and an electrophotographic photosensitive drum as process units are integrated into a cartridge and detachably mounted on the apparatus main body. The process cartridge can be attached to and detached from the apparatus main body by the user himself. Therefore, maintenance of the apparatus main body can be easily performed.

  In the image forming apparatus disclosed in Patent Document 1, the exposure unit is pressed against a part of the exterior part of the cartridge containing the photosensitive drum in conjunction with the opening / closing operation of the exterior cover. Thereby, the distance between the exposure means and the cartridge can be kept constant.

Japanese Patent Laid-Open No. 05-035003

  Japanese Patent Application Laid-Open No. 2005-228561 employs a technique in which the exposure unit is pressed against the cartridge by a spring, and the distance between the exposure unit and the cartridge is kept constant. However, since the timing of cartridge pressing and exposure means pressing is the same, a large force is required to close the cover, and it is desired to reduce the opening / closing force in terms of usability.

  Therefore, an object of the present invention is to reduce the force required for pressing by shifting the timing of cartridge pressing and exposure means pressing.

  In order to achieve the above object, a typical configuration of an image forming apparatus according to the present invention includes light emitting elements arranged in an array, and can be opened and closed with respect to an exposure member that exposes the photosensitive member and the apparatus main body. A cartridge that supports the photosensitive member in a state where the opening / closing member is opened with respect to the apparatus main body, and the image forming position can be mounted in the state where the opening / closing member is closed. In the image forming apparatus for forming a latent image on the photosensitive member by exposing the photosensitive member of the cartridge in an exposure position with an exposure member at an exposure position, the opening / closing member is opened when the opening / closing member is opened. And a first moving member that moves the cartridge from the state where it is positioned at the image forming position to the state where the positioning is released, and the opening / closing member when the opening / closing member is opened. A second moving member for moving the exposure member from the exposure position to a retracted position retracted from the exposure position by moving the exposure member in a direction in which the cartridge and the exposure member are aligned by moving under pressure. And when the opening / closing member is opened, the opening / closing member receives the reaction from the first moving member when the opening / closing member presses the first moving member to place the cartridge in a released state. A first peak occurs in the force, and the opening / closing member presses the second moving member to move the exposure member to the retracted position, and the opening / closing member receives a reaction force received from the second moving member. The second peak occurs, and the timing at which the first peak occurs is different from the timing at which the second peak occurs.

  According to the present invention, since the force required for pressing can be reduced by shifting the timing of cartridge pressing and exposure means pressing, the apparatus main body can be easily downsized regardless of the cartridge pressing direction or the exposure means pressing direction. become.

(A) is a perspective view of the electrophotographic image forming apparatus in Example 1, (b) is a longitudinal left side view of the apparatus. 1A is a partially enlarged view of FIG. 1B, and FIG. 1B is a perspective view of the apparatus when the front door is opened and the uppermost process cartridge is removed or mounted. (A) is the external appearance perspective view which looked at the cartridge of the state which the drum shirter is opened from the front side, (b) is the external appearance perspective view which looked at the cartridge from the back side (A) is explanatory drawing of attachment and removal of a cartridge, (b) is explanatory drawing of positioning of an LED unit. (A) is explanatory drawing of structure of a cartridge guide, (b) is explanatory drawing of positioning of a cartridge. (A) is an explanatory view of the interlocking operation, (b) is an explanatory view of positioning in a direction perpendicular to the cartridge removal direction. Illustration of interlock mechanism Explanatory drawing of interlocking operation of rod and cartridge pressing lever Explanation of toggle mechanism and its operation Explanatory drawing of interlocking mechanism of door and rod State diagram of rod and lever at each part when door is closed (A) is a perspective view of the device in a half-open state in which the door is slightly opened, (b) is a perspective view of the device in a half-open state in which the door is further opened. State diagram of rod and lever at each part when door is opened a little State diagram of rod and lever at each part when door is opened further State diagram of the rod and lever at each part when the door is opened to the open position Structure explanatory drawing of the electrophotographic image forming apparatus in Example 2 Enlarged cross-sectional view of the tip side of the LED unit located at the exposure position Explanation of toggle mechanism and its operation

[Example 1]
{Overall configuration of electrophotographic image forming apparatus}
FIG. 1A is a perspective view of the electrophotographic image forming apparatus 100 in this embodiment, and FIG. 1B is a longitudinal left side view of the apparatus 100. 2A is a partially enlarged view of FIG. 1B, and FIG. 2B is an apparatus 100 when the front door is opened and the uppermost process cartridge is removed or attached. FIG.

  The apparatus 100 is an in-line color electrophotographic image forming apparatus that forms a color image on a recording medium in a state where four process cartridges each having an electrophotographic photosensitive drum are detachably mounted in corresponding cartridge mounting portions of the apparatus main body. Device. An LED unit (light emitting member: LED head array, LED type exposure apparatus) is used as an image exposure apparatus (exposure means) for exposing the electrophotographic photosensitive drum.

  More specifically, the apparatus 100 is a four-color full-color LED printer using an electrophotographic process. A color image is formed on the recording medium S based on electrical image information (image signal) input to the control circuit unit 101 from a host device 200 such as a personal computer, an image reader, or a counterpart facsimile machine.

  In the following description, with respect to the apparatus 100, the front side (front side) is the side where the feeding cassette 12 in which the recording medium S is stacked and stored is loaded and unloaded. The rear side (the back side) is the side opposite to the side where it is taken in and out. The lower side is the side on which the feeding cassette 12 is disposed. The front-rear direction is a direction from the rear side to the front side (front direction) and the opposite direction (rear direction).

  Left and right are left or right when the device is viewed from the front. The left-right direction is a direction from left to right (left direction) and the opposite direction (right direction). Up and down are up or down in the direction of gravity. The apparatus main body (main body) 100A is a component of the apparatus 100 excluding the process cartridge.

  The recording medium S is an image on which an image is formed by the apparatus 100 and includes, for example, paper, an OHT sheet, an envelope, a postcard, a label, and the like (hereinafter referred to as a recording material).

  In the main body 100A, first to fourth four cartridge mounting portions 102 (102Y, 102M, 102C, and 102K) are disposed in order from bottom to top in an oblique direction inclined rearward with respect to the vertical. Each mounting portion 102 has the same configuration, and has a cartridge guide (cartridge holding member) 71 for detachably mounting the process cartridge P. The guide 71 is fixedly disposed with respect to the frame 104 forming the skeleton of the main body 100A. The LED unit 6 is swingably disposed inside each guide 71.

  The first to fourth process cartridges P (PY, PM, PC, and PK) that store different colors of developer are detachably mounted on the mounting portions 102, respectively. The first cartridge PY is the lowermost stage, and the second cartridge PM is positioned thereon. A third cartridge PC is further positioned above it.

  Each cartridge P is developed for developing (developing) the electrophotographic photosensitive drum 1 and the electrostatic latent image formed on the drum 1 as a developer image (toner image) with a developer (toner). Means 3 and the like are included. The electrophotographic process mechanisms are the same as each other except that the colors of the stored developers are different. In the cartridge P of this embodiment, the drum 1 and the charging means 2, the developing means 3 and the cleaning means 4 as process means acting on the drum 1 are integrally formed into a cartridge frame 5 with a predetermined mutual arrangement relationship. It is what.

  The drum 1 is rotatably supported with respect to the frame 5 via a bearing member (not shown). The cartridge P is an assembly whose longitudinal direction is the rotation axis direction of the drum 1, and one end side of the drum 1 in the rotation axis direction is a driving side and the other end side is a non-driving side.

  The charging unit 2 is a unit that uniformly charges the peripheral surface of the drum 1 to a predetermined polarity and potential, and uses a charging roller that is a contact charging member. The developing means 3 includes a developing roller 3a as a developing member for applying the developer to the drum 1, a supply roller 3b for supplying the developer to the developing roller 3a, and a development containing a powder developer (not shown). It has the agent accommodating part 3c etc. The cleaning unit 4 is a unit that removes the transfer residual developer from the drum surface after the developer image is transferred to the recording material S, and includes a cleaning blade 4a as a cleaning member, a waste developer container 4b, and the like.

  In the first cartridge PY, a yellow (Y) developer is accommodated in the accommodating portion 3c, and a Y color developer image is formed on the surface of the drum 1. In the second cartridge PM, a magenta (M) developer is accommodated in the accommodating portion 3c, and an M color developer image is formed on the surface of the drum 1. In the third cartridge PC, a cyan (C) color developer is accommodated in the accommodating portion 3c, and a C color developer image is formed on the surface of the drum 1. The fourth cartridge PK contains a black (K) developer in the containing portion 3c, and forms a K developer image on the surface of the drum 1.

  In a state where each cartridge P is mounted on the corresponding mounting unit 102 and positioned at a predetermined image forming position C with respect to the main body 100A, the drive input unit 59 on the cartridge P side ((b) in FIG. 6). In contrast, a drive output unit (not shown) on the main body 100A side is coupled. The image forming position C of the cartridge P is a position for forming an image on the recording material S. Further, a bias output section (not shown) on the main body 100A side is coupled to a bias input section (not shown) on the cartridge P side.

  Further, the LED unit 6 is positioned at the exposure position D for exposing the drum 1 at the rear portion of the drum 1 with respect to each cartridge P positioned at the image forming position C. The positioning of the cartridge P and the unit 6 will be described later. FIG. 17 is an enlarged cross-sectional view of the front end portion side of the unit 6 located at the exposure position D.

  The unit 6 is provided side by side in the rotation axis direction (longitudinal direction) of the drum 1, and has a light emission having LEDs (light emitting diodes) 6 a as a plurality of light emitting elements that emit light according to image information to expose the drum 1. It is a member. That is, the unit 6 is an exposure member that includes light emitting elements arranged in an array and exposes the photosensitive member.

  The unit 6 includes an LED substrate 6b and a SELFOC (registered trademark) lens 6c. The lens 6 c is a lens for converging the light emitted from the LED 6 a and exposing it to the drum 1. That is, the unit 6 mainly controls the surface of the rotating drum 1 that is charged with the charging roller 2 under the control of light emission of the plurality of LEDs 6 a corresponding to the image information input from the control circuit unit 101. Exposure means for forming an electrostatic latent image corresponding to image information by scanning exposure.

  In the apparatus 100 of this embodiment, the unit 6 includes light L (LY, LM, LC) modulated in accordance with image information of each color of Y, M, C, K input from the host apparatus 200 to the control circuit unit 101. LK) is output to scan and expose the drum 1 in the cartridge P of the corresponding color.

  In summary, the unit 6 as the light emitting member is positioned at the exposure position D in a state where the cartridge P is positioned at the image forming position C. A plurality of light emitting elements are provided side by side in the longitudinal direction of the drum 1 and are exposed in accordance with image information in order to expose the drum 1.

  A transfer unit 7 is disposed on the front side of the first to fourth mounting portions 102 (102Y, 102M, 102C, and 102K) to which the cartridges P are detachably mounted. The unit 7 includes two driving rollers 8 and a driven roller 9 which are parallel in the vertical direction, an endless conveying belt 10 suspended between the rollers 8 and 9, and four rollers corresponding to the drum 1 of each cartridge P. A transfer roller (transfer member) 11 is provided. The belt 10 is driven by the driving roller 8 and circulates at a predetermined speed in the counterclockwise direction indicated by the arrow so as to face and contact all the drums 1 of the cartridges P mounted on the mounting portions 102.

  In a state where the unit 7 is positioned at a predetermined transfer position H with respect to the main body 100A, each roller 11 is a belt between the corresponding drum 1 of each cartridge P positioned at the image forming position C. 10 is in contact with the inner surface of the belt so as to sandwich it. In each cartridge P, a contact portion (nip portion) between the drum 1 and the belt 10 is a transfer portion T. The roller 11 is a transfer member for transferring the developer image formed on the drum 1 by the developing unit 3 to the recording material S.

  A cassette 12 is disposed below the main body 100A. Sheet-shaped recording materials S are stacked on the cassette 12. The cassette 12 can be taken in and out from the front side of the apparatus 100 (front loading). Arrows F and G indicate the drawer direction and insertion direction of the cassette 12. As the recording material S in the cassette 12 is driven by the feeding roller 13, the uppermost recording material S is separated and fed to the front side in the main body 100A in cooperation with a separating member (not shown). .

  Then, it is guided upward by the guide and is registered by the registration roller pair 14 disposed in the lower part of the unit 7. A fixing device 15 is disposed above the unit 7. The apparatus 15 is an apparatus that fixes an unfixed developer image formed on the recording material S as a fixed image by applying heat and pressure. On the upper surface of the main body 100A, a discharge tray 17 for receiving a recording material on which an image has been formed from a discharge port 16 is disposed.

  The operation for forming a full-color image is as follows. Based on the image formation start signal, the drum 1 of each cartridge P is rotationally driven in a clockwise direction indicated by an arrow at a predetermined speed. The belt 10 is also rotationally driven at a speed corresponding to the speed of the drum 1 in the counterclockwise direction of the arrow (forward direction with respect to the drum rotation). Further, the roller 13 is driven to separate and feed the recording material S from the cassette 12, registered by the roller pair 14, and sent from the driven roller 9 side of the unit 7 to the surface of the belt 10 on the upstream side. The The recording material S is electrostatically attracted to the belt surface and is conveyed upward by the movement of the belt 10.

  In each cartridge P, a predetermined charging bias is applied to the roller 2 at a predetermined control timing, so that the surface of the drum 1 is uniformly charged to a predetermined polarity and potential. The unit 6 selectively controls light emission of a plurality of LEDs as light emitting elements corresponding to image information input from the control circuit unit 101, and performs main scanning exposure on the surface of the drum 1 charged by the roller 2. . Thereby, an electrostatic latent image corresponding to the image information of the corresponding color is formed on the surface of each drum 1.

  The formed latent image is developed as a developer image by the roller 3a. A predetermined developing bias is applied to the roller 3a at a predetermined control timing.

  By the electrophotographic image forming process operation as described above, a Y color developer image corresponding to the Y color component of the full color image is formed on the drum 1 of the first cartridge PY. An M color developer image corresponding to the M color component of the full color image is formed on the drum 1 of the second cartridge PM. A C developer image corresponding to the C color component of the full color image is formed on the drum 1 of the third cartridge PC. A K color developer image corresponding to the K color component of the full color image is formed on the drum 1 of the fourth cartridge PK.

  That is, a developer image corresponding to the color component of the full-color image is formed on the drum 1 of each color cartridge P by a predetermined electrophotographic image forming process operation. Then, the developer images are electrostatically attracted to the belt 10 and transferred onto the surface of the recording material S that sequentially passes through the transfer portions T of the cartridges P in a superimposed manner. A transfer bias having a predetermined potential is applied to the roller 11 from a power source (not shown) with a polarity opposite to the charging polarity of the developer. As a result, a full-color unfixed developer image of four colors of Y color + M color + C color + K color is formed on the surface of the recording material S that has exited the transfer portion T of the fourth cartridge PK.

  In each cartridge P, the developer remaining on the surface of the drum 1 after the transfer is removed by the cleaning means 4. The recording material S that has exited the transfer portion T of the fourth cartridge PK is separated from the surface of the belt 10 by the curvature of the roller 8 and is introduced into the fixing device 15 to be subjected to fixing processing of an unfixed developer image. Then, the recording material S exits the fixing device 15 and is discharged from the discharge port 16 onto the tray 17 as a full-color image formed product.

  That is, in the main body 100A, the unit 7 transfers the image formed on the drum 1 to the recording material S fed from the lower cassette (feeding unit) 12 and then transports it upward. Then, after the developer image is fixed on the recording material S, the recording material S is discharged to the outside of the main body 100A.

{cartridge}
FIG. 3A is an external perspective view of the cartridge P viewed from the front side, and shows a state where the drum shirter 52 is opened. FIG. 4B is an external perspective view of the cartridge P as viewed from the back side. On the left and right sides of the frame body 5 are handles 51L and 51R that are provided to protrude from the front side of the cartridge, positioned portions 52L and 52R that are coaxial with the rotation axis of the drum 1, and insertion guide portions 53L and 53R, respectively. Are provided symmetrically. An exposure groove portion 55 for allowing the unit 6 to enter is provided on the back side of the cartridge.

  As shown in FIG. 2A, the exposure groove 55 is a portion provided in the concave shape of the cartridge P, and forms a space through which light rays for exposing the photosensitive drum 1 pass.

  The shirter 52 is a member that protects the drum 1 and can be manually opened and closed with respect to the frame 5 by an opening / closing mechanism (not shown) in this embodiment. That is, the shirter 52 has a closed position (a position indicated by a two-dot chain line in FIG. 4A) that conceals the drum external exposure opening window portion 54 on the cartridge front side, and an open position shifted downward from the window portion 54. (The position indicated by the solid line in FIG. 3A) can be opened and closed. When the cartridge P is mounted on the main body 100A, the shirter 52 is opened. When the cartridge P is removed from the main body 100A, it is closed to conceal and protect the drum 1.

  In a state where each cartridge P is mounted in the corresponding mounting portion 102, the shirter 52 of each cartridge P is opened. In a state where a front door (opening / closing member) 31 described later with respect to the main body 100A is closed at the closed position A, the main door 100A is positioned at the transfer position H with respect to the front external exposed portion of the drum 1 of each cartridge P. The belt 10 of the unit 7 is in contact.

  The opening / closing of the shirter 52 may be automatically performed in conjunction with the opening / closing operation of the door 31. That is, when the cartridge P is inserted into the mounting portion 102 and the door 31 is closed at the closed position A, the shirter 52 is automatically moved from the closed position to the open position by an interlocking member that interlocks with the closing operation of the door 31. Further, when the door 31 is opened to the open position B, the shirter 52 can be automatically moved from the open position to the closed position.

{Cartridge replacement method}
As each cartridge P mounted on the apparatus 100 is used for image formation, the developer (toner) contained therein is consumed. Therefore, for example, a means (not shown) for detecting the developer remaining amount of each cartridge P is provided, and in the control circuit unit 101, the detected remaining amount value is set for a preset cartridge life warning or life warning. Compare with threshold.

  Then, for a cartridge whose detected remaining amount value is smaller than the threshold value, the display unit (not shown) displays a life warning or a life warning for the cartridge. This prompts the user to prepare a cartridge for replacement, or prompts the user to replace the cartridge to maintain the quality of the output image.

  In the apparatus 100 according to the present embodiment, the cartridge P is replaced by front access in order to improve usability. That is, on the front surface side of the main body 100A, an opening 103 through which the cartridge P passes is provided in order to insert each cartridge P into the corresponding mounting portion 102 and to remove each cartridge P from the corresponding mounting portion 102. ing.

  Then, a front door (front cover: of the apparatus 100) as an opening / closing member movable between a closed position A for closing the opening 103 and an open position B for opening the opening 103 ((b) in FIG. 2). (Exterior member) 31 is provided. In this embodiment, the door 31 is an operation member that is operated when the user mounts the cartridge on the main body 100A. That is, the cartridge P that supports the drum 1 can be mounted on the mounting body in a state where the door 31 is opened with respect to the apparatus body.

  In this embodiment, the door 31 can be opened and closed with respect to the main body 100A about a lower shaft (hinge shaft) 31b, and can be turned upright about the hinge shaft 31b. As described above, the opening 103 can be closed. The opening 103 is closed by closing the door 31. The door 31 in the closed position A is held in that position by a latching mechanism or a toggle mechanism (not shown).

  Further, the door 31 in the closed position A is placed almost horizontally on the front side of the apparatus main body 100A around the shaft 31b with a finger placed on the handle portion 31a to release the latch or against the toggle force. Tilt and rotate. Thereby, it can move to the open position B as shown in FIG. The door 31 moved to the open position B is held at that position.

  In the present embodiment, the unit 7 is also configured to open and close with respect to the opening 103 together with the door 31 in conjunction with the opening and closing movement of the door 31. Therefore, when the door 31 is moved to the open position B, the front side of each mounting portion 102 is opened, and the front side of the cartridge P mounted on each mounting portion 102 is exposed to the opening 103.

  The unit 7 is positioned at a predetermined transfer position H at which the image can be transferred to the recording material S with respect to each cartridge P positioned at the image forming position C in a state where the door 31 is in the closed position A. . When the door 31 in the closed position A is unlocked or rotated in the opening direction around the shaft 31b against the toggle force, the door switch (kill switch: not shown) is turned off, A power supply circuit (not shown) of the device 100 is held in an open state.

  Further, at the initial stage of opening and turning of the door 31, an interlocking mechanism (not shown) interlocked with the opening operation of the door 31 causes a drive input unit (not shown) on the unit 7 side and a drive output unit (not shown) on the apparatus body 100A side. The connection with the figure is released. Then, the coupling between the drive input section 59 (FIG. 6B) on the cartridge P side and the drive output section (not shown) on the apparatus main body 100A side is released.

  When the door 31 including the unit 7 is opened to the open position B, the opening 103 of the main body 100A is greatly opened, and the mounting portion 102 can be accessed. Further, as the door 31 is opened to the open position B, the positioning of the cartridge P with respect to the main body 100A is released as will be described later. Further, the unit 6 moves from the exposure position D (FIG. 2A) to the retracted position E (FIG. 4A) with respect to the drum 1 and is held at the retracted position E.

  Each cartridge P mounted on the mounting portion 102 is taken out by holding the left and right handle portions 51L and 51R protruding from the left and right sides of the cartridge P to the front side of the cartridge with the left and right hands, and removing the cartridge P from the mounting portion 102. Pull it out toward you. This extraction is performed by sliding the left and right insertion guide portions 53L and 53R of the cartridge P into the left and right guide groove portions 71a (FIG. 5A) of the guide 71, respectively.

  The unit 6 is removed from the exposure groove 55 by the pulling movement of the cartridge P, and the cartridge P is taken out from the apparatus main body 100A. In FIG. 4A, the arrow Y indicates the direction in which the cartridge P is removed. The shirter 52 is manually closed before or after the cartridge P is pulled out.

  The cartridge P is mounted on the mounting portion 102 by holding the cartridge P by grasping the left and right handle portions 51L and 51R of the cartridge P and inserting the cartridge P into the guide (main body side guide) 71 of the mounting portion 102 with the back side of the cartridge first. To do. This insertion is performed by engaging the left and right insertion guide portions (cartridge side guides) 53L and 53R of the cartridge P with the left and right guide groove portions 71a of the guide 71 and sliding the guide portions 53L and 53R into the guide groove portions 71a. . In FIG. 4A, the arrow X is the mounting direction of the cartridge P.

  As the cartridge P is inserted, the unit 6 located at the retracted position E enters the exposure groove 55. When the cartridge P is sufficiently inserted, the left and right positioned portions 52L and 52R are received by the left and right positioning portions 105 (recessed portion: (b) of FIG. 5), and further insertion is prevented. . The shirter 52 of the cartridge P is opened manually before or after the cartridge P is inserted into the main body 100A.

  When the replacement of the cartridge P is completed, the door 31 including the unit 7 is rotated from the open position B to the closed position A. Each cartridge P is positioned with respect to the frame 104 by the operation of an interlocking member 80 (FIG. 6A), which will be described later, interlocking with the closing operation of the door 31. The positioning position is the image forming position C of the cartridge P. Further, the unit 6 is moved from the retracted position E to the exposure position D and positioned with respect to the cartridge P positioned at the image forming position C. Further, the unit 7 is positioned at the transfer position H with respect to the main body 100A.

  That is, the belt 10 of the unit 7 is in a predetermined contact state with the front external exposed portion of the drum 1 of each cartridge P positioned at the image forming position C. The door 31 closed at the closed position A is held at that position by a latching mechanism or a toggle mechanism (not shown). In this state, the door switch is turned on, and the power supply circuit of the apparatus 100 is held in the closed state. Further, the drive output unit on the apparatus main body side is coupled to the drive input unit 59 on the cartridge P side. Further, the bias output unit on the apparatus main body 100A side is coupled to the bias input unit on the cartridge P side.

  Further, the drive output unit on the apparatus main body side is coupled to the drive input unit on the unit 7 side. Further, the drive output unit on the apparatus main body side is coupled to the drive input unit on the unit 7 side. Further, the bias output unit on the apparatus body 100A side is coupled to the bias input unit on the unit 7 side. In this state, the apparatus 100 is ready for an image forming operation.

{Positioning configuration of cartridge P and unit 6}
The unit 6 is supported by a support member (light emitting member support) 61. The guide 71 has shaft portions 72 projecting in the cartridge take-out direction Y on the left and right sides inside the rear plate. The left and right shaft portions 72 are fitted with guide holes 62 on the left and right sides of the support 61. Thus, the support 61 is supported by the guide 71 so as to be movable (swingable) in the guide 71 along the shaft portion 72 in the cartridge insertion direction X and vice versa. In addition, a coil spring (biasing member, elastic member) 73 is externally fitted to the base portion of the shaft portion 72 so as to be interposed between the support body 61 and the guide 71.

  The support 61 is moved by a predetermined amount in the cartridge taking-out direction Y by the urging force (elastic force) of the spring 73 in the free state. With this configuration, the unit 6 is supported by the support body 61 so that an exposure position D where the drum 1 is exposed by light emission from the light emitting element and a retreat position E where the drum 1 is retracted from the exposure position D can be taken.

  In a state where the cartridge P is positioned at the image forming position C, the position in the cartridge taking-out direction X at the exposure position D of the unit 6 is determined as follows. That is, the support 61 is determined by contacting the drum cover 56 that positions the drum 1 as shown in FIG. 4B by the biasing force of the spring 73. On the other hand, the direction perpendicular to the cartridge removal direction X of the unit 6 and the axial direction of the drum 1 are determined by the engagement between the guide hole 62 and the shaft portion 72.

  As shown in FIG. 7, the support 61 has a protrusion 63 (63 </ b> Y, 63 </ b> M, 63 </ b> C, 63 </ b> K) that extends to the outside of the main body frame 104. The protrusion 63 is pressed in the cartridge insertion direction X against the biasing force of the spring 73 by a lever 91 (91Y, 91M, 91C, 91K) that can rotate. As a result, the support 61 moves in the direction toward the inside of the main body (rearward) and moves away from the drum cover 56. That is, the unit 6 is moved from the exposure position D to the retracted position E and is held at the retracted position E.

  The lever 91 is separated from the protrusion 63 in a state where the apparatus 100 can perform the image forming operation. At that time, as shown in FIG. 6A, the lever 91 is urged in the arrow direction (clockwise direction) by the elastic force of the spring (elastic member) 20 and is attached to the shaft 21 implanted in the frame 104. Abut. In this state, the support 61 is moved in the cartridge take-out direction Y by the biasing force of the spring 73, and the support 61 comes into contact with the drum cover 56. As a result, the unit 6 moves from the retracted position E to the exposure position D and is positioned at the exposure position D ((b) of FIG. 4).

  The lever 91 is a light emitting member positioning member (second moving member: light emitting member pressing member) for positioning (pressing) the support 61 so that the unit 6 is positioned at the exposure position D. The lever 91 is located between a positioning position (pressing position to be pressed) Q for pressing and positioning the support body 61 so that the unit 6 is positioned at the exposure position D and a retreating position R for retreating from the positioning position Q. To move.

  A rod (interlocking member) 80 is arranged outside the frame 104 so as to be slidable in the upward direction of the arrow J and in the downward direction of the arrow K opposite thereto. This rod 80 is moved up and down in conjunction with the opening and closing operation of the door 31 as will be described later. As the rod 80 moves up and down, the protrusions 63 are released and pressed by the lever 91. That is, the unit 6 moves between the exposure position D and the retracted position E.

  Next, positioning of the cartridge P will be described. The position of the cartridge P in the insertion direction X is determined by the left and right positioned portions 52L and 52R being received by the left and right positioning portions 105 of the frame 104 as shown in FIG. Further, the position in the removal direction Y of the cartridge P is determined by pressing the convex portion 57 of the drum cover 56 by the urging force of the rotatable cartridge pressing lever 120 installed on the frame 104.

  The lever 120 is a cartridge positioning member (first moving member: a cartridge pressing member for pressing the cartridge P toward the image forming position C) for positioning the cartridge P at the image forming position C.

  By this pressing, the positioned portions 52L and 52R of the cartridge P are pressed against the positioning portion 105, and the cartridge P is held in the state of being positioned at the image forming position C. On the other hand, the direction perpendicular to the removal direction Y of the cartridge P is determined as shown in FIG. That is, the cartridge P rotates about the drive input portion 59 by the rotational driving force input from the drive output portion (not shown) to the drive input portion 59 of the cartridge P, and the protrusion 58 on the cartridge P side is the frame. It is determined by contacting the contact surface 106 on the 104 side.

  The pressing and releasing of the pressure of the cartridge P by the lever 120 are performed in conjunction with the sliding movement of the rod 80 in the same manner as the pressing and releasing of the unit 6. As shown in FIG. 8, when the rod 80 slides downward in the direction of the arrow K, the cartridge pressing contact portion 80b on the back surface (the inner surface of the main body) of the rod 80 contacts the upper surface of the protrusion 120a of the lever 120. Touch. As a result, the lever 120 rotates in a direction to escape from the convex portion 57 of the cartridge P.

  That is, the lever 120 moves from a positioning position (pressing position to be pressed) M for pressing and positioning the cartridge P to the image forming position C to a retracting position N for retracting, thereby positioning the positioned portions 52L and 52R of the cartridge P. The pressure on the portion 105 is released. That is, when the lever 120 as the first moving member is pressed and moved by the door 31 when the door 31 is opened, the cartridge P is moved from the position where it is positioned at the image forming position to the released state.

  Conversely, when the rod 80 slides upward in the direction of the arrow J, the contact portion 80 b of the rod 80 contacts the lower surface of the protrusion 120 a of the lever 120. Then, the lever 120 is pressed. As a result, the lever 120 rotates in the direction toward the convex portion 57 of the cartridge P, and the positioned portions 52L and 52R of the cartridge P are pressed by the positioning portion 105.

  That is, the lever 120 moves from the retraction position N to the positioning position N for pressing and positioning the cartridge P to the image forming position C, and presses the positioned portions 52L and 52R of the cartridge P to the positioning portion 105.

  As shown in FIG. 9A, the lever 91 and the lever 120 are respectively rotated in the clockwise direction by a lever spring (elastic member) 93 (toggle mechanism) and a pressing lever spring (elastic member) 121 (toggle mechanism). Furthermore, the lever 120 is biased counterclockwise. When it rotates more than a certain angle, as shown in FIG. 9B, the urging direction is changed by the toggle mechanism. That is, the lever 91 and the lever 120 are urged (pressed) by the toggle mechanisms 93 and 121.

  Next, an interlocking mechanism between the door 31 and the rod 80 will be described. As shown in FIG. 10, the door 31 has a door gear 23 that is concentric with a horizontal shaft 31b (FIG. 1B) that is an opening / closing center. The gear 23 rotates around the horizontal shaft 31b integrally with the door 31 as the door 31 opens and closes. An intermediate link gear 25 meshes with the door 31 via an idler gear 24. An intermediate link 26 is concentrically integrated with the gear 25. The link 26 is engaged with the door link arm 27. The gear 24, the gear 25, the link 26, and the arm 27 are pivotally supported by the frame 104.

  In conjunction with the opening operation of the door 31 from the closed position A to the open position B, the gear 23 is counterclockwise as indicated by the arrow, the gear 24 is clockwise as indicated by the arrow, and the gear 25 and the link 26 are counterclockwise indicated by the arrow. The lever 27 rotates in the clockwise direction of the arrow. The arm 27 has a shape that presses the protrusion 81 of the rod 80, and the rod 80 slides downward in the direction of the arrow K by an amount corresponding to the rotation angle of the arm 27. Conversely, the rod 80 slides upward in conjunction with the closing operation of the door 31.

  Next, in conjunction with the operation of the user opening the door 31, the operation of releasing the pressing of the cartridge P, the operation of retracting the unit 6, and the operation timing thereof will be described. First, the door 31 is closed when the apparatus 100 can print (FIG. 1). In this state, as shown in FIG. 11, the protrusion 92 of the lever 91 is separated from the pressure release contact portion 80 a, and the contact portion 80 b is separated from the protrusion 120 a of the lever 120.

  In this state, the cartridge P is pressed by the lever 120 and positioned and held at the image forming position C. Further, the unit 6 is pressed to the exposure position D by being pressed by the urging force of the spring 73 against the cartridge P positioned at the image forming position C.

  Next, when the user opens the door 31 for cartridge replacement or jamming, the latch (not shown) of the door 31 engaged with a member (not shown) installed in the main body 100A is released, The door 31 can turn toward the open position B. 12A shows a half-open state in which the door 31 is slightly opened, and FIG. 12B shows a half-open state in which the door 31 is further opened. When the door 31 is rotated as it is from the state of FIG. 12A, the rod 80 slides downward as indicated by the arrow K as described above.

  When the door 31 is rotated at a certain angle, the contact portion 80a of the rod 80 contacts and presses the projection 92 of the lever 91 as shown in FIG. And the unit 6 is hold | maintained in the state released by pressing by the toggle mechanism 93 when the spring urging | biasing direction changes ((a)-> (b) of FIG. 9). At this time, the lever 120 has not yet rotated as shown in FIG. That is, the cartridge P is positioned at the positioning position M where the cartridge P is positioned at the image forming position C.

  When the rod 80 further slides downward, as shown in FIG. 14, the abutting portion 80b abuts against and presses the projection 120a, and the pressure of the cartridge P is released. When the rod 80 further slides downward, as shown in FIG. 15, the lever 120 is retracted from the cartridge removal locus. The lever 120 is held by the toggle mechanism 121 in a released state by changing the spring biasing direction ((a) → (b) in FIG. 9).

  That is, the lever 120 moves from the positioning position M to the retracted position N. Then, when the door 31 including the unit 7 is moved to the open position B, the opening 103 is greatly opened, and each cartridge P is exposed from the opening 103 and can be taken out of the main body 100A.

  Next, the operation when the door 31 including the unit 7 is closed after the cartridge replacement or the jam processing is completed will be described. When the door 31 is opened, the protrusion 91a of the lever 91 is in contact with the contact 80a of the rod 80, and the contact 80b of the rod 80 is also in contact with the protrusion 120a of the lever 120 (see FIG. 15). In this state, both the cartridge P and the unit 6 are released from pressing (positioning is released). When the door 31 is closed, the rod 80 slides upward in the direction of the arrow J (FIG. 8) as described above in conjunction with the closing operation.

  When the door 31 is rotated by a certain angle, the contact portion 80b of the rod 80 is separated from the protrusion 120a of the lever 120, and the cartridge pressing operation is completed (FIG. 14 → FIG. 13). That is, the lever 120 moves from the retracted position N to the positioning position M. At this time, the lever 91 has not yet rotated. That is, the lever 91 is located at the retracted position R. When the door 31 is further closed and the rod 80 is slid further upward, the contact portion 80a is separated from the projection 92, and the unit 6 contacts the cartridge cover 56.

  That is, the cartridge P is positioned at the image forming position C, and the unit 6 is pressed by the drum cover 57 of the cartridge P and positioned at the exposure position D. The apparatus 100 is ready for printing with the door 31 fully closed.

  In the above, the rod 80 moves the lever 120 from the retracted position N to the positioning position M in conjunction with the operation of the door 31 (operation member, exterior member) in order to attach the cartridge P to the main body 100A. is there. Further, it is an interlocking member that moves the lever 91 from the retracted position R to the positioning position Q so that the unit 6 is positioned from the retracted position E to the exposure position D.

  The lever 91 is moved from the positioning position Q so that the unit 6 is retracted from the exposure position D to the retracted position E in conjunction with the operation of the door 31 in order to remove the cartridge P from the main body 100A. The interlocking member is retracted to the retracted position R. Further, it is an interlocking member that retracts the lever 120 from the positioning position M to the retracted position E thereafter. That is, by moving the unit 6 from the exposure position D in the direction in which the cartridge P and the unit 6 are aligned by moving the lever 91, which is the second moving member, when pressed by the door 31 when the door 31 is opened. Move from the exposure position D to the retracted position E.

  Here, in the configuration of this embodiment described above, the following reaction force is applied. That is, if the door 31 is to be opened, the door 31 passes through the rod 80 during the retraction operation from the exposure position D to the retraction position E of the unit 6 and the positioning release operation with respect to the image forming position C of the cartridge P. A reaction force is received from the lever 91 and the lever 120 of the toggle mechanism. Further, due to the nature of the toggle mechanism, the peak of the reaction force is generated immediately before the biasing direction of the spring (lever spring 93, pressing lever spring 121) of the toggle mechanism changes.

  In this embodiment, when the door 31 is opened, the retreat operation from the exposure position D to the retreat position E of the unit 6 is performed first. Thereafter, a pressing release operation of the cartridge P, that is, a positioning release operation with respect to the image forming position C of the cartridge P is performed. On the other hand, when the door 31 is closed, the pressing operation of the cartridge P, that is, the positioning operation of the cartridge P with respect to the image forming position C is performed first. Thereafter, a pressing operation from the retracted position E of the unit 6 to the exposure position D is performed.

  As described above, since the toggle state is used to switch between the pressed state and the pressed release state, and the respective pressing timings are changed, the opening / closing force of the door 31 may be smaller than that in the case where the doors are simultaneously pressed. That is, in order to change each pressing timing, the peak of the reaction force which the door 31 receives from the lever 91 and the lever 120 of the toggle mechanism via the rod 80 occurs at different timings. For this reason, compared with the case where a peak generate | occur | produces simultaneously, the maximum value of the operating force required for the door 31 opening and closing becomes low, and usability can be improved.

  The above is summarized as follows. As the door 31 is opened, a first peak is generated in the reaction force that the door 31 receives from the lever 120 when the door 31 presses the lever 120 to place the cartridge P in a released state. A second peak occurs in the reaction force that the door 31 receives from the lever 91 when the door 31 presses the lever 91 to move the unit 6 to the retracted position E. The timing at which the first peak occurs is different from the timing at which the second peak occurs.

  As shown in FIG. 6A, in this embodiment, when the door 31 is closed, the lever 91 is moved in the Q direction by the elastic force of the spring 20 to move from the retracted position R to the positioning position R. However, the lever 91 may be moved in the Q direction using the lever spring 93 (FIG. 9) that is a toggle mechanism instead of the elastic force of the spring 20 and moved from the retracted position R to the positioning position R and held.

  In this case, as shown in FIG. 18, the rod 80 is provided with a contact portion 80c that contacts the lever 91 and presses the lever 91 in the J direction when the rod 80 moves in the J direction. Then, the lever 91 is rotated in the Q direction by the rod 80 contact portion 80c so that the lever spring 93 is biased in the R direction to the biased state in the Q direction by the lever spring 93. Also good.

  In this configuration, when the door 31 is closed, the rod 80 moves in the J direction, contacts and presses the lever 120, and performs the positioning operation of the cartridge P with respect to the image forming position C. Thereafter, the contact portion 80c of the rod 80 contacts and presses the lever 91, and the pressing operation from the retracted position E to the exposure position D of the unit 6 is performed.

  Here, when the door 31 is closed, the door 31 receives a reaction force from the lever 91 and the lever 120 of the toggle mechanism via the rod 80 in the same manner as when the door 31 is opened. The peak of the reaction force is configured to occur immediately before the biasing direction of the toggle mechanism springs (lever spring 93, pressing lever spring 121) changes.

  On the other hand, since the pressing timings of the lever 120 and the lever 91 are changed, the peak of the reaction force that the door 31 receives from the lever 91 and the lever 120 of the toggle mechanism via the rod 80 occurs at different timings. Therefore, the maximum value of the operating force required to open and close the door 31 is lower than when a peak occurs at the same time, and usability can be improved.

[Example 2]
16A and 16B are explanatory diagrams of the image forming apparatus 100 of the present embodiment. In the apparatus 100 of this embodiment, an inner cover 7A (double-sided unit) that also serves as double-sided conveyance is disposed between the door 31 and the transfer unit 7 in the apparatus 100 of Embodiment 1 so that double-sided printing can be performed. The door 31, the inner cover 7A, and the transfer unit 7 can be individually opened / closed and rotated with respect to the main body 100A around a lower hinge shaft (not shown).

  A link lever 41 for transmitting the rotation of the unit 7A to the rod 80 is installed at the rotation center of the unit 7A. The lever 41 is rotated in the counterclockwise direction of the arrow by the opening rotation of the unit 7A. The lever 41 has a protruding portion 41a. When the protruding portion 41a presses the protruding portion 42a of the intermediate link 42, the link 42 rotates in the clockwise direction of the arrow, and the rod pressing portion 42b of the link 42 becomes the rod. The protrusion 81 is pressed. Thereby, the rod 80 slides in the downward direction of the arrow K. In addition, the lever 41, the link 42, and the rod 80 perform the reverse operation of the unit 7A when the unit 7A is closed and rotated.

  In this embodiment, the door 31, the inner cover 7A, and the transfer unit 7 are operation members that are operated when the user mounts the cartridge on the main body 100A. In this embodiment, the cartridge 80 is pressed and released, and the LED unit is pressed by the sliding movement of the rod 80 in the vertical direction accompanying the opening / closing operation of the inner cover 7A in conjunction with the operation of the inner cover 7A. And the evacuation operation is performed. To remove the cartridge P, the door 31 is opened and rotated, and then the inner cover 7A is opened and rotated.

  The retraction operation of the unit 6 and the release of the cartridge P are released by the downward sliding movement of the rod 80 interlocking with the opening of the inner cover 7A. Then, the unit 7 is opened and rotated to take out the cartridge P from the opening 103. When the cartridge P is replaced with a new one, the unit 7 is closed and turned, and then the inner cover 7A is closed and turned. The cartridge P pressing operation and the unit 6 pressing operation are performed by the upward sliding movement of the rod 80 interlocking with the opening and closing of the inner cover 7A. Finally, the door 31 is closed.

  In this embodiment, when opening the inner cover 7A, the unit 6 is first retracted (moved from the exposure position D to the retracted position E), and then the pressure release operation of the cartridge P (position release from the image forming position C) is performed. )It is carried out. On the other hand, when the inner cover 7A is closed, the pressing operation of the cartridge P (positioning with respect to the image forming position C) is performed first, and then the pressing operation of the unit 6 (movement from the retracted position E to the exposure position D retracted position E) is performed. Is going.

  Switching between the pressed state and the pressed release state uses the toggle mechanism as in the first embodiment, and changes (differentiates) the respective pressing timings. Therefore, the opening / closing force of the inner cover 7A, which is the operating member, is compared with the case of pressing simultaneously. Is good with small force.

[Other matters]
1) Although the image forming apparatuses of Embodiments 1 and 2 are examples of an inline type color printer, similar effects can be obtained even with a monochrome printer configuration.

  2) As a light emitting element of the light emitting member 6, for example, an electroluminescent element such as a liquid crystal element, a semiconductor light emitting diode, or an organic electroluminescent element (organic EL element) is used. A semiconductor light emitting diode is a semiconductor element that emits light when a voltage is applied. An organic EL element is an electronic material made of an organic compound that glows when a voltage is applied, and emits light by itself. In the organic EL element, for example, an organic molecular light emitting layer is sandwiched between two electrodes and a voltage is applied. As a result, electrons and holes injected from the electrodes are recombined to excite organic molecules, and light is emitted when the excited organic molecules return to the ground state.

  3) In the present invention, the operation member operated when the user mounts the cartridge P on the apparatus main body 100A is not limited to the front door 31 in the first embodiment and the duplex unit 7A in the second embodiment. For example, an operation member such as a lever may be used.

  4) In the first and second embodiments, the positioning of the cartridge P with respect to the image forming position C is configured to be pressed and positioned. However, the cartridge P may be pulled and positioned. Further, in the embodiment, the positioning of the unit 6 that is a light emitting member with respect to the exposure position D is a configuration in which the support body 61 is pressed and positioned, but a configuration in which the support body 61 is pulled to be positioned can also be employed.

  5) In the first and second embodiments, the unit 6 is positioned at the exposure position D by bringing the support 61 into contact with the drum cover 56. However, the unit 6 may be positioned at the exposure position D by forming a positioning portion on the frame 104 and bringing the support 61 into contact with the positioning portion of the frame 104 in the same manner as the cartridge P.

  In such a positioning configuration, when the door 31 or the inner cover A is opened, the pressing release operation of the cartridge P, that is, the positioning release operation of the cartridge P with respect to the image forming position C is performed first. Thereafter, a retreat operation from the exposure position D to the retreat position E of the unit 6 is performed. You may comprise in this way.

  When the door 31 or the inner cover A is closed, the pressing operation from the retracted position E to the exposure position D of the unit 6 is performed first. Thereafter, the pressing operation of the cartridge P, that is, the positioning operation of the cartridge P with respect to the image forming position C is performed. You may comprise in this way.

  Even in this manner, as in the above-described embodiment, the peak timing of the reaction force that the door 31 or the inner cover 7A receives from the lever 91 and the lever 121 occurs because the pressing timing of the cartridge P and the unit 6 is changed (different). The timing to do is different. For this reason, compared with the case where it presses simultaneously, a small force may be sufficient as opening and closing force.

  6) In the first and second embodiments, when the door 31 or the inner cover A is opened and when the door 31 or the inner cover A is closed, the pressing timing of the cartridge P and the unit 6 is changed (different). However, at least when the door 31 or the inner cover A is opened or when the door 31 or the inner cover A is closed, the pressing timing of the cartridge P and the unit 6 may be changed (different). Also in this case, the opening / closing force of the door 31 may be smaller than when the door 31 or the inner cover A is opened and when the door 31 or the inner cover A is closed at the same time.

  1 .... Electrophotographic photosensitive drum, 2-4..Processing means, P..Process cartridge, 100A..Main body, S..Recording medium, 100..Electrophotographic image forming apparatus, 31..Operation member, C..Image forming position, 120..Cartridge positioning member, M..Positioning position, N..Retraction position, 6..Light emitting member, D..Exposure position, E..Retraction position, 61..Light emitting member support Body, 91 .. Light emitting member positioning member, Q .. Positioning position, R .. Retraction position, 80 .. Interlocking member

Claims (6)

An exposure member comprising light emitting elements arranged in an array, and exposing a photoreceptor;
An opening and closing member that can be opened and closed with respect to the apparatus main body,
A cartridge that supports the photosensitive member in a state where the opening / closing member is opened with respect to the apparatus main body can be attached to the attachment main body,
In the image forming apparatus for forming an image by forming a latent image on the photosensitive member by exposing the photosensitive member of the cartridge at the image forming position with the exposure member at the exposure position with the opening / closing member closed. ,
A first moving member that is moved by being pressed by the opening and closing member when the opening and closing member is opened, thereby bringing the cartridge into a released state from a state in which the cartridge is positioned at the image forming position;
When the opening / closing member is opened, the opening / closing member is pressed and moved to move the exposure member away from the exposure position by moving the exposure member in the direction in which the cartridge and the exposure member are aligned. A second moving member that moves to a position,
When the opening / closing member is opened, the reaction force received by the opening / closing member from the first moving member when the opening / closing member presses the first moving member to bring the cartridge into a released state of positioning. When a peak of 1 is generated and the opening / closing member presses the second moving member to move the exposure member to the retracted position, a second peak is applied to a reaction force that the opening / closing member receives from the second moving member. Occurs,
An image forming apparatus, wherein a timing at which the first peak occurs is different from a timing at which the second peak occurs.   As the opening / closing member is opened, the opening / closing member presses and moves the first moving member to bring the cartridge into a released state, and then moves the exposure member to the retracted position. The image forming apparatus according to claim 1, wherein the second moving member is pressed and moved to move the image forming apparatus. The first moving member is pressed and moved by the opening / closing member when closing the opening / closing member, thereby positioning the cartridge at the image forming position,
The second moving member is moved by being pressed by the opening and closing member when closing the opening and closing member, thereby moving the exposure member to the exposure position,
In order to position the cartridge at the image forming position, the opening / closing member presses the first moving member at a timing when the opening / closing member moves the exposure member to the exposure position. The image forming apparatus according to claim 1, wherein the image forming apparatus is different from a timing of pressing the button.   The image forming apparatus according to claim 3, wherein the first moving member and the second moving member are moved by a toggle mechanism. An exposure member comprising light emitting elements arranged in an array, and exposing a photoreceptor;
An opening and closing member that can be opened and closed with respect to the apparatus main body,
A cartridge that supports the photosensitive member in a state where the opening / closing member is opened with respect to the apparatus main body can be attached to the attachment main body,
In the image forming apparatus for forming an image by forming a latent image on the photosensitive member by exposing the photosensitive member of the cartridge at the image forming position with the exposure member at the exposure position with the opening / closing member closed. ,
A first moving member that positions the cartridge at the image forming position by being pressed and moved by the opening and closing member when closing the opening and closing member;
A second moving member configured to move the exposure member in the direction in which the cartridge and the exposure member are arranged to move to the exposure position by being pressed and moved by the opening / closing member when the opening / closing member is closed; Have
When the opening / closing member is closed, the opening / closing member presses the first moving member to position the cartridge at the image forming position. The reaction force received by the opening / closing member from the first moving member is first. When the opening / closing member presses the second moving member to move the exposure member to the exposure position, a second peak is generated in the reaction force received by the opening / closing member from the second moving member. Occur,
An image forming apparatus, wherein a timing at which the first peak occurs is different from a timing at which the second peak occurs.   When the opening / closing member is closed, the opening / closing member presses and moves the first moving member to position the cartridge to the image forming position, and then moves the exposure member to the exposure position. The image forming apparatus according to claim 5, wherein the second moving member is pressed and moved for positioning.