JP2015031865A - Developer container, process cartridge, and image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a developer container configured to reliably prevent leakage of developer even when the developer container is improperly mounted on a developing apparatus.SOLUTION: A developer container 22 includes a shutter which opens/closes a developer outlet. The shutter is opened/closed by rotating an operation member 26. The operation member 26 includes engagement sections 58, 34 which are rotated along with the rotation of the operation member and rotation-supported when engaged with support sections 54, 33 arranged on a developing apparatus 4. When the engagement sections 58, 34 are properly engaged with the support sections 54, 33, the engagement sections 58, 34 interfere with the support sections 54, 33, to regulate rotation of the engagement sections 58. 34.

Description

  The present invention relates to a developer container, a process cartridge to which a developer container can be attached and detached, and an image forming apparatus.

  2. Description of the Related Art In image forming apparatuses such as copying machines and printers, a system in which a developer container that stores toner as a developer used for development is configured to be detachable from the developing apparatus is widely adopted. In this system, when the developer container is attached to the developing device, the discharge port of the developer container is connected to the replenishing port of the developing device, so that the toner can be supplied from the developer container to the developing device. Become. Generally, this type of developer container is configured such that the discharge port can be closed so that the developer does not leak outside from the discharge port when the container is removed from the apparatus main body.

  For example, Japanese Patent Application Laid-Open No. 2006-235592 discloses a toner cartridge provided with a shutter that opens and closes a toner supply port and an operation lever that operates the shutter. In a state where the toner cartridge is detached from the apparatus main body, the toner supply port is closed by the shutter, and the operation lever cannot be operated by the lock mechanism. Therefore, even when the operation lever is inadvertently operated, the shutter does not open and the toner does not scatter from the toner supply port. On the other hand, when the toner cartridge is mounted on the apparatus main body, the lock mechanism is released and the operation lever can be operated, and the shutter can be opened to fill the toner contained in the toner cartridge into the developing device.

  However, the toner cartridge as the developer container is not always attached to the image forming apparatus main body in the correct position and posture. The toner cartridge may be attached to the image forming apparatus main body in a twisted state or an inclined state. If the operation lever can be operated even in such a poorly mounted state, the toner will scatter in the image forming apparatus. There is a risk of toner leakage.

  In recent image forming apparatuses, a process unit in which a photosensitive unit, a developing unit, and a toner cartridge are integrated is often used. With such a configuration, the process unit can be attached to and detached from the image forming apparatus main body. Therefore, the toner cartridge cannot be positioned and fixed to a strong rigid body (frame or the like) of the image forming apparatus main body. For this reason, defective mounting of the toner cartridge is likely to occur, and the above problem is more likely to occur.

  SUMMARY OF THE INVENTION In view of such circumstances, the present invention intends to provide a developer container, a process cartridge, and an image forming apparatus that can reliably prevent developer leakage even when the developer container mounted on the developing device side is defectively mounted. Is.

  In order to solve the above problems, a developer container according to the present invention contains a developer and a container body that can be attached to and detached from the developing device side, and is provided in the container body. A discharge port that discharges the stored developer, a shutter that is attached to the container body and that can open and close the discharge port, and is rotatably attached to the container body and opens and closes the shutter according to the rotation direction. A developer container including an operation member, wherein the operation member can be rotated in conjunction with the rotation of the operation member, and the rotation is supported by fitting with a support portion provided on the developing device side. A fitting portion is provided.

  In the present invention, the fitting portion provided on the operation member is rotationally supported by the support portion on the developing device side. In such a configuration, when there is a mounting failure of the developer container, the rotation center of the fitting portion is displaced, so that it is difficult to smoothly support the rotation by the support portion on the stationary side. In this case, even if the operation member is operated to rotate the fitting portion, the fitting portion interferes with the support portion, and thus the fitting portion cannot be rotated. Therefore, even if the operator operates the operation member by mistake, the fitting portion does not rotate and the shutter does not open. Therefore, it is possible to prevent developer leakage due to erroneous opening of the shutter.

1 is a schematic configuration diagram illustrating an embodiment of an image forming apparatus to which the present invention is applied. It is a figure which shows the attachment / detachment method of a process unit. FIG. 3 is a perspective view of a state where a toner cartridge is mounted on a process unit. FIG. 3 is a perspective view of a state where a toner cartridge is removed from a process unit. FIG. 4 is a diagram of a toner cartridge as viewed from the front side. FIG. 7 is a perspective view showing the configuration of the right side surface of the process unit and the toner cartridge in a state where the toner cartridge is mounted on the process unit, where (a) is a diagram showing a state in which the lock is released; FIG. 4 is a diagram showing a locked state. FIG. 7 is a diagram of the configuration of the right side surface of the process unit and the toner cartridge viewed from the inside in a state where the toner cartridge is mounted on the process unit, where (a) shows a state in which the lock is released; ) Shows a state in the middle of locking, and (c) shows a locked state. FIG. 6 is a view of a state in which the toner cartridge is being locked from the front side. FIG. 4 is a diagram illustrating a configuration of a left side surface side of the toner cartridge. FIG. 3 is a perspective view of a toner cartridge showing a state where a waste toner introduction port is opened. FIG. 3 is a perspective view of a toner cartridge showing a state in which a waste toner introduction port is closed. It is a principal part perspective view of a process unit showing a state where a waste toner discharge port is closed. It is a principal part perspective view of a process unit showing a state where a waste toner discharge port is opened. FIG. 6 is a perspective view of a toner cartridge illustrating a location where a replenishment toner outlet shutter is disposed. It is a perspective view of the process unit which shows the arrangement | positioning location of a connection member. 4A and 4B are cross-sectional views of the toner cartridge, wherein FIG. 5A is a diagram illustrating a state where a replenishing toner discharge port is closed, and FIG. 5B is a diagram illustrating a state where the replenishing toner discharge port is opened. FIG. 6 is a side view of the toner cartridge and the process unit in a state where a replenishment toner discharge port is closed. FIG. 6 is a side view of the toner cartridge and the process unit in a state where a replenishment toner discharge port is opened. FIG. 6 is a perspective view illustrating a connection state of an operation member, a shutter, and a linking member when a toner cartridge is mounted on the developing device side of the process unit. FIG. 6 is a side view illustrating a connection state of an operation member, a shutter, and a linkage member when a toner cartridge is mounted on the developing device side of the process unit. FIG. 4 is a diagram illustrating a state where a process cartridge in which a toner cartridge and a process unit are integrated is lifted. 2A and 2B are diagrams illustrating a configuration of a shutter opening / closing mechanism provided on the right side of the developing device, in which FIG. 1A illustrates a state in which the shutter main body is disposed at a closed position, and FIG. FIG. It is a figure which shows the latching mechanism of a replenishment toner entrance shutter. FIG. 4 is a diagram illustrating a right side configuration of a developing device and a toner cartridge. FIG. 4 is a diagram illustrating a state in which a pressing surface of a toner cartridge is in contact with a pressed portion of a shutter body. It is a figure which shows the latch release mechanism of a replenishment toner entrance shutter. FIG. 6 is a diagram illustrating an opening operation of a replenishment toner inlet shutter. FIG. 6 is a diagram illustrating a closing operation of a replenishment toner inlet shutter. It is a perspective view which shows the right side surface of a process cartridge. It is sectional drawing which shows the outline of a support part. It is a perspective view of an operation member. It is a perspective view of a 2nd fitting member. It is a figure which shows a temporary holding state, Comprising: (a) is a 1st fitting part, (b) is a side view which shows a 2nd fitting part, respectively. It is a figure which shows a locked state, Comprising: (a) is a 1st fitting part, (b) is a side view which shows a 2nd fitting part, respectively. It is a figure which shows the state of mounting defect, Comprising: (a) is a 1st fitting part, (b) is a side view which shows a 2nd fitting part, respectively. It is a figure which shows the positional relationship of the fitting part and support part in a normal mounting state, Comprising: (a) is a temporary holding state, (b) is sectional drawing which shows the locked state after operation of an operation member. It is a figure which shows the positional relationship of a fitting part and a support part in the state of mounting defect, Comprising: (a) is a temporary holding state, (b) is sectional drawing which shows the state after operation of an operation member. It is a perspective view which shows 2nd embodiment of an operation member. It is a perspective view which shows 2nd embodiment of a 2nd fitting member. It is a figure which shows the locked state in 2nd embodiment, (a) is a 1st fitting part, (b) is a side view which shows a 2nd fitting part. It is a figure which shows the temporary holding state in 2nd embodiment, (a) is a 1st fitting part, (b) is a side view which shows a 2nd fitting part. 1 is a schematic configuration diagram of an indirect transfer type color image forming apparatus. 1 is a schematic configuration diagram of a direct transfer type color image forming apparatus.

  Hereinafter, the present invention will be described with reference to the accompanying drawings. In the drawings for explaining the present invention, components such as members and components having the same function or shape are denoted by the same reference numerals as much as possible, and once described, the description will be given. Omitted.

  FIG. 1 is a schematic configuration diagram showing an embodiment of an image forming apparatus to which the present invention is applied. First, the overall configuration and operation of the image forming apparatus will be described with reference to FIG.

  The image forming apparatus shown in FIG. 1 is a monochrome image forming apparatus. A process unit 1 as an image forming unit is detachably mounted on the apparatus main body (image forming apparatus main body) 100. The process unit 1 visualizes a photoreceptor 2 as an image carrier that carries an image on the surface, a charging roller 3 as a charging unit that charges the surface of the photoreceptor 2, and a latent image on the photoreceptor 2. A developing device 4 as a developing unit and a cleaning blade 5 as a cleaning unit for cleaning the surface of the photoreceptor 2 are provided. Further, an LED head array 6 as an exposure unit that exposes the surface of the photoconductor 2 is provided at a position facing the photoconductor 2.

  Further, a toner cartridge 7 as a developer container is detachably attached to the upper surface (mounting portion) of the developing device 4 provided in the process unit 1. The toner cartridge 7 has a toner storage portion 8 for storing toner as a developer to be supplied to the developing device 4 in the container main body 22. Further, the toner cartridge 7 of the present embodiment also has a toner collecting unit 9 that collects the toner (waste toner) removed by the cleaning blade 5.

  In addition, the image forming apparatus includes a transfer device 10 that transfers an image to a sheet as a recording medium, a paper feeding device 11 that supplies the sheet, a fixing device 12 that fixes the image transferred to the sheet, and a sheet outside the apparatus. And a paper discharge device 13 for discharging the paper.

  The transfer device 10 includes a transfer roller 14 as a transfer member. The transfer roller 14 is in contact with the photosensitive member 2 with the process unit 1 mounted on the apparatus main body 100, and a transfer nip is formed at the contact portion between the two. The transfer roller 14 is connected to a power source (not shown) so that a predetermined direct current voltage (DC) and / or alternating current voltage (AC) is applied.

  The paper feed device 11 includes a paper feed cassette 15 that contains paper P and a paper feed roller 16 that feeds the paper P contained in the paper feed cassette 15. In addition, a pair of registration rollers 17 are provided on the downstream side of the paper feeding direction with respect to the paper feeding roller 16 as timing rollers for feeding the paper to the secondary transfer nip by measuring the feeding timing. The paper P includes cardboard, postcard, envelope, plain paper, thin paper, coated paper (coated paper, art paper, etc.), tracing paper, and the like. Further, an OHP sheet, an OHP film, or the like can be used as a recording medium other than paper.

  The fixing device 12 includes a fixing roller 18 as a fixing member and a pressure roller 19 as a pressure member. The fixing roller 18 is heated by a heating source (not shown) such as a heater. The pressure roller 19 is pressed toward the fixing roller 18 and comes into contact with the fixing roller 18, and a fixing nip is formed at the contact portion.

  The paper discharge device 13 includes a pair of paper discharge rollers 20. The paper discharged out of the apparatus by the paper discharge roller 20 is stacked on a paper discharge tray 21 formed by denting the upper surface of the apparatus main body 100.

Next, an image forming operation of the image forming apparatus according to the present embodiment will be described with reference to FIG.
When the image forming operation is started, the photosensitive member 2 is rotationally driven, and the surface of the photosensitive member 2 is uniformly charged to a predetermined polarity by the charging roller 3. Then, an electrostatic latent image is formed on the charged surface of the photoreceptor 2 by exposure from the LED head array 6 based on image information from a reading device (not shown) or a computer. The toner is supplied by the developing device 4 to the electrostatic latent image formed on the photoreceptor 2 in this manner, whereby the electrostatic latent image is visualized (visualized) as a toner image.

  When the image forming operation is started, the paper feed roller 16 starts to rotate and the paper P is sent out from the paper feed cassette 15. The fed paper P is temporarily stopped by the registration roller 17. Thereafter, rotation of the registration roller 17 is started at a predetermined timing, and the paper P is conveyed to the transfer nip in accordance with the timing at which the toner image on the photoconductor 2 reaches the transfer nip.

  At this time, a transfer voltage having a polarity opposite to the toner charging polarity of the toner image on the photoreceptor 2 is applied to the transfer roller 14, thereby forming a transfer electric field in the transfer portion. The toner image on the photoreceptor 2 is transferred onto the paper P by this transfer electric field. The residual toner on the photoreceptor 2 that has not been transferred onto the paper P is removed by the cleaning blade 5 and collected by the toner collecting unit 9 in the toner cartridge 7.

  The sheet P on which the toner image is transferred is conveyed to the fixing device 12 and is heated and pressed by passing through the fixing nip between the fixing roller 18 and the pressure roller 19, so that the toner image on the sheet P is transferred. Is established. Then, the paper P is discharged out of the apparatus by the paper discharge roller 20 and stocked on the paper discharge tray 21.

FIG. 2 is a diagram illustrating a method for attaching and detaching a process unit.
As shown in FIG. 2, in this embodiment, the cover 101 provided in the front part of the apparatus main body 100 can be opened and closed. Further, when the cover 101 is opened, the LED head array 6 is retracted upward via a link mechanism (not shown). With this configuration, the process unit 1 is positioned in front of the apparatus while avoiding interference with the LED head array 6 with the cover 101 opened (the side facing the traveling direction of the discharged paper P). It is possible to remove from the right side). At this time, the toner cartridge 7 can be removed from the front of the apparatus main body 100 as an integrated process cartridge with the process cartridge 1 mounted. Further, the toner cartridge 7 can be attached to and detached from the process unit 1 regardless of whether the process unit 1 is attached to the apparatus main body 100 or removed.

FIG. 3 is a perspective view of a state where the toner cartridge is mounted on the process unit, and FIG. 4 is a perspective view of the state where the toner cartridge is removed from the process unit.
In FIG. 3, the direction indicated by the arrow A1 is the mounting direction when the process unit 1 and the toner cartridge 7 are mounted on the apparatus main body 100, and the direction indicated by the arrow A2 is the process unit 1 and the toner cartridge 7 mounted on the apparatus main body. It is the direction of removal when removing from 100.
In FIG. 4, the direction indicated by arrow B <b> 1 is the mounting direction when the toner cartridge 7 is mounted on the process unit 1, and the direction indicated by arrow B <b> 2 is removal when the toner cartridge 7 is removed from the process unit 1. Direction.
Hereinafter, in the toner cartridge 7 and the process unit 1, the front side in the mounting direction A1 (or mounting direction B1) is referred to as the back side, and the rear side opposite thereto is referred to as the front side, and the front in the mounting direction A1 (or mounting direction B1) is referred to as the front side. The explanation will be made by defining the right side and the left side.

  On the near side of the mounting direction of the toner cartridge 7, a gripping portion 25 is provided for the operator to grip when attaching to or detaching from the apparatus main body 100 or the process unit 1. The grip portion 25 is attached to a support shaft 35 (see FIG. 4) that is a cylindrical bar disposed horizontally in the longitudinal direction of the container body 22. When the toner cartridge 7 and the process unit 1 are removed from the apparatus main body 100 or when the toner cartridge 7 is removed from the process unit 1, as shown in FIG. The part 25 can be gripped. On the other hand, after the toner cartridge 7 and the process unit 1 are mounted on the apparatus main body 100, as shown in FIG. 3, the gripping part 25 can be put into the storage state by rotating the gripping part 25 to the back side. . Further, when the process unit 1 is mounted as shown in FIG. 2, even if the operator forgets to rotate the gripping part 25 to the back side, the cover 101 is rotated from below and applied to the gripping part 25. The rotation center (support shaft 35) of the grip portion 25 is more than the center of gravity G of the grip portion 25 (see FIGS. 16 (a) and 16 (b)) so that the grip portion 25 can be rotated together. It is provided below.

  Hereinafter, the configuration of the toner cartridge 7 and the process unit 1 will be described in more detail with reference to FIGS.

  As shown in FIG. 4, a rotatable operation member 26 is provided on the right side surface 22 a of the container body 22. The operation member 26 is fixed to the right end portion of the support shaft 35 and rotates together with the support shaft 35. The support shaft 35 is rotatably supported by bearings 27a and 27b (see FIG. 5) at both ends of the container body 22 so as to be rotatable with respect to the container body 22.

  As shown in FIGS. 6 and 7, the operation member 26 integrally includes a lever portion 57 and a first fitting portion 58 that rotates together with the support shaft 35. The lever portion 57 includes a fixed portion 26a to which the support shaft 35 is fixed, an extending portion 26b extending from the fixed portion 26a in a direction perpendicular to the axial direction of the support shaft 35, and the axial direction of the support shaft 35. It has the flat plate part 26c which bends and extends further from the extension part 26b, in other words, the flat plate part 26c which extends at an angle with respect to the radial direction from the center of the support shaft 35.

  As shown in FIG. 14, the first fitting portion 58 includes a disc-shaped bottom plate portion 58a extending in a direction orthogonal to the axial direction at one end portion of the support shaft 35, and a standing portion standing upright from the bottom plate portion 58a. 58b integrally. As shown in FIG. 20, the upright portion 58b has a double wall structure extending in the circumferential direction of the bottom plate portion 58a and closed at both ends in the circumferential direction, and includes an outer wall 581 on the outer diameter side and an inner wall 582 on the inner diameter side. Have Both ends in the circumferential direction of the standing portion 58b are opened in a direction orthogonal to the axial direction, and the inner peripheral surface of the inner wall 582 forms a U-shaped first fitting surface 58c as viewed from the axial direction. Yes. The operation member 26 is attached to one end portion of the support shaft 35 with the end surface of the rising portion 58b of the first fitting portion 58 facing outward, and when the toner cartridge 7 is attached to the process unit 1, the process unit A convex support portion 54 (see FIG. 29) provided on the right side surface 1a of 1 is fitted to the first fitting surface 58c. The first fitting portion 58 can have any configuration as long as it can rotate in conjunction with the lever portion 57, and the lever portion 57 and the first fitting portion 58 are integrally formed as described above. In addition, the two members may be attached to the support shaft 35 as separate members.

  The toner cartridge 7 can be fixed to the process unit 1 by rotating the operation member 26 described above. Specifically, as shown in FIG. 6A, a protrusion is provided as a lock portion 26c1 on the right end surface of the flat plate portion 26c of the operation member 26, and this lock portion 26c1 is the right side of the toner cartridge 7. It is possible to engage with an engaging portion 1c as a mounting portion side engaging portion provided on the right side surface 1a of the process unit 1 which is an inner wall surface facing the surface.

  In other words, the engaging portion 1c is a guide groove that is formed on the inner wall surface and into which the lock portion 26c1 that is the protrusion can enter. The engaging portion 1c includes an open portion 1c1 where the groove starts so as to enter the right side surface 1a from the front vertical side of the right side surface 1a, a bent portion 1c2 where the groove is bent halfway, And an open portion 1c3 formed so as to extend out to the horizontal side. Further, of the both side surfaces of the groove of the engaging portion 1c when viewed from the axial direction of the support shaft 35, the lock portion 26c1 is in contact with the side surface from the open portion 1c1 to the bent portion 1c2 that is far from the shaft center. The sliding surface 1c4 is a surface that moves while sliding. Furthermore, there is an engagement surface 1c5 that is connected to the sliding surface 1c4, extends in the vertical direction from the bent portion 1c2 to the opening portion 1c3, and engages with the lock portion 26c1.

Next, a series of operations of the operation member 26 in a state where the toner cartridge 7 is mounted on the process unit 1 will be described.
First, as shown in FIGS. 6A and 7A, the operator places the toner cartridge 7 in the process unit 1 and locks the flat plate portion 26c of the operation member 26 with a finger in a state before the lock. It is sandwiched from above and below or pushed from below to apply a pressing force to the operation member 26 and rotate the operation member 26 so as to push it into the back side. Then, the lock portion 26c1 reaches the opening portion 1c1 on the near vertical side of the engaging portion 1c. Further, when a pressing force is applied to the flat plate portion 26c of the operation member 26 to rotate it backward, as shown in FIG. 7B, the lock portion 26c1 is in contact (sliding) with the sliding surface 1c4. Moving. Further, due to the contact between the lock portion 26c1 and the sliding surface 1c4, the braking force J acts in the direction opposite to the pressing force X of the operating member 26 (against the pressing force). At this time, since the flat plate portion 26c is formed to a certain extent by a single plate made of resin such as polystyrene that can be elastically deformed, the flat plate portion 26c is distorted from the lock portion 26c1 as shown in FIG. Pushed in. Thereafter, as shown in FIG. 7C, when the lock portion 26c1 reaches the bent portion 1c2, the sliding state between the lock portion 26c1 and the sliding surface 1c4 is finished, and the lock portion 26c1 contacts the engaging surface 1c5. Touch. Thus, the state in which the lock portion 26c1 is in contact with the engagement surface 1c5 is the locked state. Further, in the locked state, the flat plate portion 26c is released from elastic deformation and returned to its original shape, and the flat plate portion 26c takes such a posture that the lock portion 26c1 comes into contact with the engaging surface 1c5. That is, even if an unexpected force that rotates the flat plate portion 26c of the operation member 26 acts on the operation member 26, the flat plate portion 26c is not deformed unless the force is considerably large, so that the lock portion 26c1 does not get over the engagement surface 1c5.

  On the contrary, when the operator presses the flat plate portion 26c from above with the finger and rotates the operation member 26 to the near side, the flat plate portion 26c is pushed into the previous back side with the lock portion 26c1 as a starting point. Elastically deforms in the opposite direction. Then, the engagement between the lock portion 26c1 and the engagement portion 1c is released, and the lock is released.

  Further, as shown in FIG. 4, the right side surface 22 a of the container body 22 is provided with a positioning convex portion 29 that is a cylindrical protruding portion for positioning the toner cartridge 7 with respect to the process unit 1. Yes. Similarly, the left side surface 22b of the container main body 22 shown in FIG. 10 is provided with a positioning convex portion 31 that is a protruding portion having a half-moon shaped cross section for positioning the toner cartridge 7 with respect to the process unit 1. ing. On the other hand, the right side surface 1a and the left side surface 1b of the process unit 1 are provided with abutting portions 30 and 32 formed in a groove shape so that the curved surfaces of the positioning convex portions 29 and 31 abut against each other (see FIG. 4).

  As shown in FIG. 10, a second fitting portion 34 is rotatably attached to the left side surface 22 b of the container body 22. Similar to the first fitting portion 58, the second fitting portion 34 includes a disk-like bottom plate portion 34a extending in a direction orthogonal to the axial direction of the support shaft 35, and an upright portion standing upright in the axial direction from the bottom plate portion 34a. 34b. The bottom plate portion 34 a is attached to the other end of the support shaft 35. The standing portion 34b has a double wall structure extending in the circumferential direction of the bottom plate portion 34a and having both ends in the circumferential direction closed, and has an outer wall 341 on the outer diameter side and an inner wall 342 on the inner diameter side. Both ends in the circumferential direction of the standing portion 34b are opened in a direction orthogonal to the axial direction, and the inner peripheral surface of the inner wall 342 forms a U-shaped second fitting surface 34c when viewed from the axial direction. . When the toner cartridge 7 is attached to the process unit 1, a convex support portion 33 (see FIG. 4) provided on the left side surface 1 b of the process unit 1 is fitted to the second fitting surface 34 c.

  In the present embodiment, the second fitting portion 4 is connected to the same support shaft 35 (see FIG. 4) as the operation member 26. When the operation member 26 is rotated in the forward and reverse directions, the second engagement portion 4 is interlocked with this. The second fitting portion 34 is also rotated in the forward and reverse directions. In the present embodiment, the grip portion 25 is also attached to a support shaft 35 that connects the first fitting member 34 and the operation member 26. However, the grip portion 25 can be rotated independently of the support shaft 35 and is not interlocked with the operation member 26.

  As shown in FIG. 5, an elastic member including a torsion coil spring 28 and the like is disposed between the support shaft 35 and the container body 22. The torsion coil spring 28 urges the support shaft 35, and the operation member 26 (first fitting portion 58) and the second fitting portion 34 connected to the support shaft 35 in the clockwise direction in FIG. 9. ing. The first fitting portion 58 and the second fitting portion 34 are held in a prescribed posture by a stopper (not shown) that resists the biasing of the torsion coil spring 28. Specifically, in the first fitting portion 58 and the second fitting portion 34, the open portion between both ends of the standing portions 58 b and 34 b faces obliquely downward in a natural state where no external force is applied to the operation member 26. Is held so. In the present embodiment, as shown in FIG. 9, the opening direction of the second fitting portion 34 is such that the inner peripheral surface of the standing portion 58 b near the opening portion is when the toner cartridge 7 is placed on the placement surface Z. In the posture, the direction is inclined by 30 degrees with respect to the vertical line V with respect to the horizontal plane. As shown in FIG. 14, the opening direction of the first fitting portion 58 is also the same as the opening direction of the second fitting portion 34, and is inclined 30 degrees with respect to the vertical line V.

  As shown in FIG. 10, a waste toner introduction port 36 that is a square hole for introducing waste toner into the inside (toner recovery unit 9) is provided on the left side 22 b side of the container body 22. . The waste toner introduction port 36 is formed in an arcuate recess 22d formed below the positioning projection 31 and opens upward. A seal 36a made of a sponge material is affixed around the waste toner introduction port 36, and a waste toner inlet shutter 37 that can rotate so as to slide on the upper surface of the seal 36a is provided above the seal 36a. (See FIG. 11).

  The waste toner inlet shutter 37 is curved so as to be rotatable following the arc-shaped recess 22d. The waste toner inlet shutter 37 is biased by a biasing member 37a that is a torsion coil spring that biases the waste toner introduction port 36 in a rotational direction that always closes the waste toner introduction port 36 when the toner cartridge 7 is alone. . The urging member 37 a is disposed between the waste toner inlet shutter 37 and the toner cartridge 7 so as to be inserted into the rotation shaft of the waste toner inlet shutter 37. When the waste toner inlet shutter 37 is rotated, the waste toner introduction port 36 is opened (the state shown in FIG. 10), and the waste toner introduction port 36 is closed (the state shown in FIG. 11). And can be switched to.

  As shown in FIG. 12, a cylindrical waste toner conveyance path 39 is provided on the left side surface 1b side of the process unit 1 so as to protrude inward. A waste toner discharge port 38 for discharging waste toner is provided at the front end of the waste toner conveyance path 39 so as to open downward. A waste toner outlet shutter 40 for opening and closing the waste toner discharge port 38 is attached to the outer periphery of the front end of the waste toner conveyance path 39. The waste toner outlet shutter 40 is configured to rotate about an axis, and is in an open state in which the waste toner discharge port 38 is opened (a state shown in FIG. 13) and in a closed state in which the waste toner discharge port 38 is closed. The state can be switched to the state (the state shown in FIG. 12).

  The waste toner inlet shutter 37 and the waste toner outlet shutter 40 are both disposed by a biasing member 37a (see FIG. 10) and a biasing member 40a (see FIG. 12) made of a torsion coil spring. The outlet 38 is biased in the closing direction. Further, the waste toner outlet shutter 40 is provided with a convex contact portion 41 with which the waste toner inlet shutter 37 contacts when the toner cartridge 7 is attached to the process unit 1. When the waste toner inlet shutter 37 comes into contact with the contact portion 41, both the shutters 37 and 40 rotate in a direction to open the waste toner introduction port 36 or the waste toner discharge port 38 (arrow direction shown in FIGS. 10 and 13). It comes to move. When the toner cartridge 7 is attached to the process unit 1, the opened waste toner introduction port 36 and the waste toner discharge port 38 are disposed at positions facing each other. In this state, the waste toner introduction port 36 and the waste toner discharge port 38 communicate with each other, and the waste toner removed from the surface of the photoreceptor 2 can be introduced into the toner cartridge 7 (in the toner collection unit 9). Become.

  On the other hand, when the toner cartridge 7 is detached from the process unit 1, the waste toner inlet shutter 37 and the waste toner outlet shutter 40 are released from the contact of the waste toner inlet shutter 37 with the contact portion 41. Rotates in the urging direction of the urging member (the arrow direction shown in FIGS. 11 and 12). As a result, the waste toner introduction port 36 and the waste toner discharge port 38 are closed, and toner leakage from the waste toner introduction port 36 and the waste toner discharge port 38 is prevented.

  Further, as shown in FIG. 14, the supply toner discharge port 42, which is a square hole for discharging the toner stored in the toner storage portion 8, is formed on the curved surface on the right side 22 a side of the container body 22. Is provided. The replenishment toner discharge port 42 is opened downward, and the replenishment toner discharge port 42 can be opened and closed following a curved surface (arc surface) where the replenishment toner discharge port 42 is located below the replenishment toner discharge port 42. A toner outlet shutter 43 is provided. The replenishment toner outlet shutter 43 is disposed so as to be concentric with the cylindrical center line of the positioning convex portion 29 which is a cylindrical protrusion, and to be rotatable along a curved surface (arc surface) with the replenishment toner discharge port 42. Has been.

  The replenishment toner outlet shutter 43 includes a protrusion 43b that protrudes in the direction of the rotation axis. As shown in FIG. 14, a torsion coil spring 43c as an urging member is disposed between the replenishment toner outlet shutter 43 and the right side surface 22a which is a cover member that hides the gear train. A hook portion provided at an end of the torsion coil spring 43c is hooked on the convex portion 43b, and the replenishment toner outlet shutter 43 is urged by the torsion coil spring 43c in a direction to close the replenishment toner discharge port.

  On the other hand, as shown in FIG. 15, a supply port 44 for introducing supply toner is provided on the right side surface 1a side of the developing device 4 of the process unit 1 so as to open upward. The supply port 44 is connected to the developing device 4 through a toner supply path (not shown) so that the toner supplied from the toner cartridge 7 can be conveyed to the developing device 4. A replenishment toner inlet shutter 45 is provided in the vicinity of the replenishment port 44, and the replenishment toner inlet shutter 45 is slid left and right so that the replenishment port 44 is opened and closed.

FIG. 16 is a schematic cross-sectional view of the toner cartridge.
As shown in FIG. 16, in the toner storage portion 8 of the container body 22, a stirring blade 46 as a stirring member for stirring the stored toner and the stored toner to the replenishment toner discharge port 42. A conveying screw 47 as a conveying member for conveying is provided. In addition, a conveying screw 48 as a conveying member for conveying the waste toner in the toner collecting unit 9 is provided in the toner collecting unit 9.

  Each of the conveying screws 47 and 48 and the stirring blade 46 are configured such that a driving force from a driving source (not shown) provided in the apparatus main body 100 is transmitted via a drive transmission means. Specifically, in the present embodiment, a drive connecting portion 49 (see FIG. 4) is provided on the right side surface 22a of the container main body 22 as drive transmission means, and the drive connecting portion 49, the conveying screws 47 and 48, and the stirring blade 46. Are provided with a plurality of transmission gears (not shown). When the toner cartridge 7 is mounted on the apparatus main body 100, a drive transmission member (not shown) on the apparatus main body 100 side is engaged with the drive connecting portion 49, so that the conveying screws 47 and 48 and the stirring blades from the drive source on the apparatus main body 100 side. 46 is ready for drive transmission.

  Further, as shown in FIG. 16, the replenishment toner outlet shutter 43 is formed in an arc shape following the shape of the cylindrical container in which the replenishment toner discharge port 42 is formed, and the toner is discharged to a part thereof. The hole 43a is formed. The replenishment toner outlet shutter 43 is rotatable along the outer peripheral surface where the replenishment toner discharge port 42 is formed.

  As shown in FIG. 16A, when the replenishment toner outlet shutter 43 rotates counterclockwise in the drawing, the replenishment toner discharge port 42 is closed by the replenishment toner outlet shutter 43. On the contrary, as shown in FIG. 16B, when the replenishment toner outlet shutter 43 rotates clockwise in the figure, the hole 43a of the replenishment toner discharge port 42 is disposed at a position where it communicates with the replenishment toner discharge port 42. Then, the replenishment toner discharge port 42 is opened.

  By the way, the operation member 26 having the lock function also functions as means for opening and closing the replenishment toner outlet shutter 43. However, the operation member 26 and the replenishment toner outlet shutter 43 are provided at positions separated from each other and are not directly connected. That is, in the toner cartridge 7 alone, the operation member 26 and the replenishment toner outlet shutter 43 are not linked, and the replenishment toner exit shutter 43 is not opened or closed even if the operation member 26 is operated. Yes.

  As shown in FIG. 15, in the present embodiment, a linkage member 51 is provided in the process unit 1, and the operation member 26 and the replenishment toner outlet shutter 43 can be linked with each other via the linkage member 51. Become.

Hereinafter, the configuration of the operation member 26, the replenishment toner outlet shutter 43, and the linking member 51 will be described in detail with reference to FIGS.
In the following description, the replenishment toner outlet shutter 43 is simply referred to as “shutter” unless particularly necessary.

  As shown in FIG. 19, the linkage member 51 is formed of a long member, and the first fitting portion 58 of the operation member 26 on one end side and the shutter 43 on the other end side respectively. It comes to match.

  Further, as shown in FIG. 19, the shutter 43 serves as an engaging portion (second container side engaging portion) that can be engaged with the linking member 51 so that the other end of the linking member 51 is hooked. It has the convex part 43b which protrudes in a rotating shaft direction. As described above, the shutter 43 is biased by the torsion coil spring 43c in the direction of closing the replenishment toner discharge port 42 (see the arrow in FIG. 16A).

  The linking member 51 is formed of a relatively soft resin that is easily elastically deformed, such as polypropylene (PP), polyethylene (PE), and oil-impregnated polyacetal (POM). As shown in FIGS. It comprises a part 52 and a linear moving part 53 made of a flexible strip-like or linear member provided integrally with the rotating part 52.

  The rotating part 52 provided at one end of the linking member 51 has a gentle mountain-shaped convex part 52a. As shown in FIG. 15, the rotating portion 52 is disposed so as to overlap the inside of the support portion 54 provided on the right side surface 1 a of the process unit 1, and is rotatable with respect to the support portion 54 via the shaft portion 52 b. It is attached. When the toner cartridge 7 is attached to the process unit 1, the support portion 54 is fitted to the first fitting surface 58 c of the first fitting portion 58, and at the same time, the convex portion 52 a of the rotating portion 52 is first fitted. It is accommodated in the space in the mating surface 58c. At this time, as shown in FIG. 20, the root portions on both sides in the circumferential direction of the convex portion 52a are in contact with the first fitting surface 58c. The contact portions Q1 and Q2 are below the shaft portion 52b.

  The linear movement part 53 has the projection part 53a as an engaging member side engaging part which can be engaged with the convex part 43b of the shutter 43, in other words, can be hooked. The protrusion 53 a is formed of a rib that protrudes in the direction perpendicular to the length of the linear moving portion 53.

  Further, the linear moving portion 53 is provided with a guide projection 53b to be inserted into a groove-shaped guide portion 55 (see FIG. 17) provided on the right side surface 1a of the process unit 1. As the guide protrusion 53b moves along the guide portion 55, the linear movement portion 53 can reciprocate linearly. Further, a stopper 53c wider than the guide 55 is provided at the tip of the guide protrusion 53b so that the guide protrusion 53b does not fall off the guide 55. In addition, one end of a tension spring 56 as an urging member is engaged with the end portion of the linear moving portion 53 on the shutter 43 side (see FIGS. 17 and 18). The other end of the tension spring 56 is engaged with the right side surface 1 a of the process unit 1. By this tension spring 56, the linking member 51 is urged to the back side.

  Since the linking member 51 is configured as described above, when the rotating portion 52 rotates in the direction of the arrow C1 in FIG. 20, the linear moving portion 53 is pulled along with this, and in the direction of the arrow D1 in FIG. Move straight. On the contrary, when the rotating part 52 rotates in the direction of arrow C2 in FIG. 20, the linear moving part 53 is pushed and moves linearly in the direction of arrow D2 in FIG.

Next, the opening / closing operation of the shutter (replenishment toner outlet shutter) will be described.
As shown in FIG. 17, the toner cartridge 7 is mounted on the process unit 1 and the first fitting surface 58c of the operation member 26 is fitted to the rotating portion 52 of the linkage member 51 as shown in FIG. Further, when the operation member 26 is turned to the back side, the turning portion 52 is turned clockwise in the drawing. Along with this, the linear movement unit 53 is pulled and linearly moves to the near side. At this time, the protrusion 53a provided at the end of the linear moving portion 53 is hooked on the convex portion 43b of the shutter 43 (see FIG. 19), so that the shutter 43 is rotated in the opening direction, and the replenishment toner discharge port 42 is provided. Is released.

  In this embodiment, when the supply toner discharge port 42 is opened, the supply port 44 (see FIG. 15) on the process unit 1 side is already open. Therefore, when the replenishment toner discharge port 42 is opened, the toner can be replenished from the toner cartridge 7 to the developing device 4 of the process unit 1.

  On the contrary, as shown in FIG. 17, when the operation member 26 is rotated to the near side, the rotation part 52 is rotated counterclockwise in the figure, and accordingly, the linear movement part 53 is moved by the tension spring 56. Move to the back side. As a result, the shutter 43 is rotated in the closing direction, and the replenishment toner discharge port 42 is closed.

  Further, in the present embodiment, when the operation member 26 is rotated to the back side in order to open the shutter 43 as described above, at the same time, the lock portion 26c1 provided on the operation member 26 is moved to the process unit 1 side. It is engaged and locked with the engaging portion 1c (see FIG. 6B). On the other hand, when the operating member 26 is rotated forward to close the shutter 43, the engagement between the lock portion 26c1 and the engaging portion 1c is released simultaneously (see FIG. 6A). . As described above, in this embodiment, by operating the operation member 26, the opening / closing operation of the shutter 43 and the operation of fixing and releasing the fixing of the toner cartridge 7 with respect to the process unit 1 can be performed simultaneously. .

  When the locked state is released, the toner cartridge 7 can be removed from the process unit 1. When the toner cartridge 7 is removed from the process unit 1, the operation member 26 and the shutter 43 are not interlocked. Therefore, even if the operator carelessly moves the operation member 26 in this state, the shutter 43 does not move. Does not rotate. As described above, in a state in which the toner cartridge 7 is removed, by preventing the shutter 43 from being opened, toner leakage from the replenishment toner discharge port 42 can be prevented.

  As described above, when the toner cartridge 7 is not attached to the attachment portion, the shutter 43 and the operation member 26 are in an unlinked state. Therefore, even if the operator carelessly moves the operation member 26 in this state, the shutter 43 never opens. As a result, it is possible to prevent toner leakage from the replenishment toner discharge port 42 when the toner cartridge 7 is not attached.

  Further, since the linkage member 51 is configured to be capable of reciprocating linear movement, even if the operation member 26 and the shutter 43 are arranged at positions separated from each other on the near side and the far side, these separated members They can be linked together in a compact manner. As a result, the number of parts is reduced compared to a configuration using, for example, a gear train as the linkage member, and the installation space for the linkage member can be saved. As a result, the image forming apparatus can be reduced in size, and a toner cartridge that can be mounted on the downsized image forming apparatus can be provided.

  In addition, according to the above-described embodiment, since the linking member 51 has a compact configuration, particularly in a configuration in which the arrangement of components is increased in density, a space for installing the linking member is ensured while avoiding interference with other components. It becomes possible. For example, as in the above-described embodiment, when the drive connecting portion 49 constituting the drive transmission means is disposed between the linking portions of the operation member 26 and the shutter 43 (FIG. 17), the interference with the drive connecting portion 49. It is necessary to dispose the linking member 51 so as to avoid the problem. Even in such a configuration, according to the above embodiment, the linking member 51 and the drive connecting portion 49 are orthogonal to the side surfaces 22a and 1a on the same side of the container body 22 and the process unit 1, respectively. When viewed from the direction, they can be arranged so as not to overlap each other, and interference between components can be easily avoided.

  In the above-described embodiment, the configuration in which the toner cartridge can be attached to and detached from the mounting portion of the process unit has been described as an example. However, the toner cartridge may be directly attached to and detached from the mounting portion of the apparatus main body. That is, the linking member can be provided not in the process unit but in the apparatus main body.

  Hereinafter, the opening / closing mechanism of the replenishment toner inlet shutter 45 (see FIG. 15) will be described in detail with reference to FIGS.

FIG. 22 is a diagram illustrating a configuration of a shutter opening / closing mechanism provided on the right side of the developing device 4.
The replenishment toner inlet shutter 45 is a straight line between a closed position where the replenishment port 44 is closed (position shown in FIG. 22A) and an open position where the replenishment port 44 is opened (position shown in FIG. 22B). It is possible to move. In this embodiment, the replenishment toner inlet shutter 45 can reciprocate in the longitudinal direction of the developing device 4, that is, in the axial direction of the developing roller.

  The replenishment toner inlet shutter 45 has a shutter main body 45a that closes the replenishment port 44, and a hole 45b is formed in the shutter main body 45a. In the open position shown in FIG. 22 (b), the hole 45b of the shutter main body 45a is disposed at a position facing the supply port 44, so that the supply port 44 is opened. On the other hand, in the closed position shown in FIG. 22A, the hole 45b of the shutter main body 45a is arranged at a position not facing the supply port 44, so that the supply port 44 is closed by the shutter main body 45a. . Further, a seal 45c made of a sponge material is provided at the peripheral edge of the hole 45b. When the toner cartridge 7 is mounted on the developing device 4 and the replenishment toner outlet shutter 43 of the toner cartridge 7 is opened, the seal 45c is formed on the peripheral portion of the hole 43a (see FIG. 14) of the replenishment toner exit shutter 43. It is for closely contacting and preventing toner leakage.

  The shutter main body 45a is provided with a latching portion 45d for hooking a hooking portion 71a on one end side of a coil spring 71 as an urging member. The hook 71 b on the other end side of the coil spring 71 is hooked on a hook 4 b provided in the case 4 a of the developing device 4 in the process unit 1. Due to the biasing force of the coil spring 71, the shutter main body 45a is constantly biased toward the closed position (the right side in FIG. 22).

  Further, the shutter main body 45a is provided with an extending portion 45e extending in the moving direction to the open position (left side in FIG. 22), and a claw-like locked portion 45f is provided on the upper surface of the distal end portion of the extending portion 45e. Is provided. On the other hand, the case 4a of the developing device 4 is provided with a locking portion 4c that is a protrusion that can be locked with the locked portion 45f. The locking portion 4c protrudes downward from the lower surface of the rising portion 4d provided to rise upward from the case 4a. As shown in FIG. 22B, when the locking portion 4c and the locked portion 45f are locked, the shutter body 45a is held in the open position against the biasing force of the coil spring 71. It has become.

  As shown in FIG. 23, when the locked portion 45f comes into contact with the locking portion 4c as the shutter body 45a moves to the open position, the locked portion 45f slides against the locking portion 4c. However, the extending portion 45e is elastically deformed so as to bend downward. As a result, the locked portion 45f gets over the locking portion 4c, and when the extended portion 45e returns to the upper side when it gets over, the locked portion 45f and the locking portion 4c are locked. In addition, inclined surfaces 4c1 and 45f1 are provided at the sliding contact portions of the locking portion 4c and the locked portion 45f, respectively, so that the locked portion 45f can easily get over the locking portion 4c.

  Although the shutter body 45a can be locked by providing the locking portion 4c on the toner cartridge 7 side, the locking portion 4c is provided on the case 4a of the developing device 4 as in the present embodiment. Thus, it is possible to avoid applying a load to the toner cartridge 7 when the shutter body 45a is locked. Thereby, the mounting state of the toner cartridge 7 to the developing device 4 can be stabilized.

  Further, as shown in FIG. 22, at the intermediate portion in the longitudinal direction of the extending portion 45e, the lock release for releasing the lock between the lock portion 4c and the locked portion 45f by cooperation with the toner cartridge 7 described later is performed. A portion 45g is provided. The locking release portion 45g is formed by a curved surface protruding upward.

  The shutter body 45a is provided with a pressed portion 45h that generates a force for moving the shutter body 45a to the open position in cooperation with a toner cartridge 7 described later. The pressed portion 45h is an inclined surface that is inclined with respect to the moving direction of the shutter main body 45a.

FIG. 24 is a diagram showing a right side configuration of the developing device 4 and the toner cartridge 7.
As shown in FIG. 24, on the right side of the container main body 22 of the toner cartridge 7, the above-described supply toner discharge port 42 and a curved supply (arc surface) supply toner outlet shutter 43 that opens and closes it are provided. Further, on the right side, a protruding portion 22e protruding in the outer diameter direction from the replenishment toner outlet shutter 43 is provided. The protrusion 22e has a pressing surface 22f that comes into contact with the pressed portion 45h of the shutter main body 45a. The pressing surface 22f comes into contact with the pressed portion 45h when the toner cartridge 7 is mounted. Therefore, the pressed portion 45h of the shutter body 45a is disposed on the passage route E1 of the pressing surface 22f when the toner cartridge 7 is attached / detached with the shutter body 45a shown in FIG. In other words, the passage path E1 of the pressing surface 22f during the attaching / detaching operation of the toner cartridge 7 is configured to pass through the position of the pressed portion 45h in a state where the shutter main body 45a is disposed at the closed position. Then, by the contact of the pressing surface 22f with the pressed portion 45h, the pressed portion 45h generates a force that moves the shutter main body 45a to the open position (left side in FIG. 24) against the biasing force of the coil spring 71. .

  In the present embodiment, as shown in FIG. 25, the mounting direction B1 of the toner cartridge 7 and the moving direction L of the shutter main body 45a to the open position are different from each other. The to-be-pressed part 45h is made into the inclined surface so that it can convert into the force which moves to the open position. Specifically, the pressed portion 45h is opposite to both the direction B1 of the toner cartridge 7 to the mounting portion of the developing device 4 and the direction L of movement to the open position of the shutter body 45a (see FIG. 25). It is inclined so that it may face the right side and the lower side.

  Further, as shown in FIG. 24, a protrusion 22 g that protrudes downward is provided on the container body 22 of the toner cartridge 7 on the left side of the supply toner outlet shutter 43. The protrusion 22g has an abutment surface 22h that abuts the locking release portion 45g. In the state where the shutter main body 45a shown in FIG. 24 is disposed at the closed position, the unlocking portion 45g is not disposed on the passage path E2 of the contact surface 22h when the toner cartridge 7 is attached / detached. In the state where the shutter main body 45a indicated by the two-dot chain line in the figure is arranged at the open position, it is arranged on the passage route E2 of the contact surface 22h. In other words, the passage E2 of the contact surface 22h during the attaching / detaching operation of the toner cartridge 7 is configured to pass through the position of the locking release portion 45g in a state where the shutter main body 45a is disposed at the open position. .

  As shown in FIG. 26, when the contact surface 22h of the protrusion 22g contacts the locking release portion 45g, the locking release portion 45g is pushed by the contact surface 22h and elastically deforms so that the extending portion 45e bends downward. It is supposed to be. As a result, the locking of the locked portion 45f and the locking portion 4c is released.

The opening / closing operation of the replenishment toner inlet shutter 45 will be described below.
First, the opening operation of the replenishment toner inlet shutter 45 will be described with reference to FIG.
As shown in FIG. 27A, when the toner cartridge 7 is not mounted on the mounting portion of the developing device 4, the supply toner inlet shutter 45 is in the closed position, and the supply port 44 is closed by the shutter body 45a. It is in a state. When the toner cartridge 7 is inserted in the mounting direction B1 in this state, as shown in FIG. 27B, the pressing surface 22f of the toner cartridge 7 comes into contact with the pressed portion 45h of the shutter main body 45a. 27C, the pressed portion 45h is pressed by the pressing surface 22f by the pressing force of the toner cartridge 7 in the mounting direction B1, and the replenishment toner inlet shutter 45 resists the biasing force of the coil spring 71. Then, the movement starts to the open position side.

  Further, when the toner cartridge 7 is inserted in the mounting direction B1, as shown in FIG. 27D, the locked portion 45f at the tip of the extending portion 45e is locked with the locking portion 4c, so that the replenishing toner is obtained. The entrance shutter 45 is locked at the open / close position. At this time, the hole 45b of the shutter main body 45a is disposed at a position facing the supply port 44, so that the supply port 44 is opened. When the replenishment toner inlet shutter 45 moves to the open position, the contact surface 22f of the toner cartridge 7 and the unlocking portion 45g of the replenishment toner inlet shutter 45 move so as not to contact each other. In this way, the replenishment toner inlet shutter 45 is smoothly moved to the open position.

Next, the closing operation of the replenishment toner inlet shutter 45 will be described with reference to FIG.
As shown in FIG. 28A, when the toner cartridge 7 is attached to the developing device 4 and the replenishment toner inlet shutter 45 is locked at the open position, the toner cartridge 7 is moved in the removing direction B2, and the same operation is performed. As shown in FIG. 2B, the contact surface 22 h of the toner cartridge 7 contacts the locking release portion 45 g of the replenishment toner inlet shutter 45. When the abutting surface 22h abuts on the unlocking portion 45g, the unlocking portion 45g is pushed by the abutting surface 22h, the extending portion 45e bends downward (see FIG. 26), and is engaged with the locked portion 45f. The locking with the stopper 4c is released.

  As shown in FIG. 28C, when the locked portion 45f and the locking portion 4c are unlocked, the replenishment toner inlet shutter 45 is pulled toward the closed position by the biasing force of the coil spring 71. Moving. Thus, as shown in FIG. 28D, when the toner cartridge 7 is removed from the developing device 4, the supply toner inlet shutter 45 is disposed at the closed position, and the supply port 44 is closed by the shutter main body 45a. It becomes.

  In such a configuration, the shutter (replenishment toner inlet shutter) on the developing device side can be opened and closed in conjunction with the attaching / detaching operation of the toner cartridge with respect to the developing device. Accordingly, the shutter opening / closing operability is excellent, and it is possible to prevent the operator from forgetting to open and close the shutter.

The characteristic configuration of the present invention will be described below with reference to FIGS.
In the present invention, the support shaft 35 for rotating the operation member 26 is supported not only by the toner cartridge 7 but also on the process unit 1 side. For this support, fitting portions 58 and 34 are provided on both sides in the axial direction of the support shaft 35, while supporting portions 54 and 33 fitted on the both side surfaces 1 a and 1 b of the process unit 1 with the fitting portions 58 and 34. Is provided.

  FIG. 30 shows an enlarged cross-sectional profile of the outer peripheral surfaces of the support portions 54 and 33 formed on both side surfaces 1a and 1b of the process unit 1, respectively. The outer peripheral surfaces of both the support portions 33 and 54 have the same shape, and each has a shape obtained by cutting off (D-cutting) the radially opposed positions of the cylindrical surface. Specifically, the outer peripheral surfaces of the support portions 33 and 54 connect the cylindrical surface portions to each other on the inner diameter side of two cylindrical surface portions 62 having a radius R1 and a virtual circle (shown by a two-dot chain line) having the same diameter as the cylindrical surface portion 62. The connecting surface 63 includes an adjacent cylindrical surface portion 62 and an arcuate chamfer 64 that smoothly connects the connecting surfaces 63.

  As shown in FIGS. 30 and 36 (a), the radius R1 of the cylindrical fitting surface 62 is equal to the first fitting surface 58c of the first fitting portion 58 and the second fitting surface of the second fitting portion 34. It is equal to the curvature radius R2 of the cylindrical fitting surface 34c2 of 34c (R1 = R2). Further, the connection surface 63 of this embodiment has a flat surface shape parallel to each other, and the width dimension W1 between the two connection surfaces 63 is the width at the open ends of the first fitting surface 58c and the second fitting surface 34c. It is smaller than the dimension W2 (W1 <W2). Of the chamfers 64 formed on the outer peripheral surfaces of the support portions 33 and 54, the chamfer 64a on the back side (A1 direction in FIG. 30) and below has a radius of curvature r larger than the radius of curvature of the other chamfers. The chamfer 64a functions as an escape portion that avoids interference with the first fitting surface 58c and the second fitting surface 34c that rotate as described later. In addition to being formed as a flat surface, the connection surface 63 can also be formed as a cylindrical surface having a radius of curvature larger than the radius of curvature R1 of the cylindrical fitting surface 62. Further, each chamfer 64 including the relief portion 64a can be formed by two or more cylindrical surfaces having different curvature radii in addition to being formed by one arc.

  The connection surfaces 63 of the support portions 33 and 54 are in a state of being inclined so that the upper side is the front side. The inclination angle of the connection surface 63 at this time is the inclination angle of the first fitting surface 58c (see FIG. 9) and the inclination angle of the second fitting surface 34c (see FIG. 14) when the toner cartridge 7 is removed from the process unit 1. See the same level).

  As shown in FIGS. 6B, 7A, 15, and 29, a protrusion 66 is formed on the right side surface 1a of the process unit 1. As shown in FIG. The protruding portion 66 is provided at a position that restrains the outer peripheral surface of the outer wall 581 of the first fitting portion 58 from the outer diameter side in a state where the toner cartridge 7 is mounted on the process unit 1. Further, as shown in FIGS. 4, 12, and 13, a protrusion 67 having a protruding shape is formed on the left side surface 1 b of the process unit 1. In a state where the toner cartridge 7 is attached to the process unit 1, the outer peripheral surface of the outer wall 341 (see FIG. 9) of the second fitting portion 34 is restrained by the protruding portion 67.

Next, the structure of the 1st fitting part 58 and the 2nd fitting part 34 is demonstrated in detail.
The outer wall 581 formed in the first fitting portion 58 is formed in a cylindrical surface shape whose entire outer peripheral surface is centered on the rotation center of the support shaft 35 (shaft portion 52b) (see FIG. 20). As shown in FIG. 36 (a), the first fitting surface 58c, which is the inner peripheral surface of the inner wall 582, has a semi-cylindrical surface whose center in the circumferential direction is coaxial with the outer peripheral surface of the outer wall 581. A cylindrical fitting surface 34c2 is formed at the portion. Both ends in the circumferential direction of the cylindrical fitting surface 3c2 are formed as flat surfaces extending in the tangential direction, and a non-cylindrical fitting surface 34c1 as a rotation restricting portion is formed in this portion.

  As shown in FIG. 31, notches 58d and 58e are provided in a part of the circumferential direction in each end face of the outer wall 581 and the inner wall 582 of the first fitting portion 34. The notches 58d and 58e are provided at positions where the protrusions 66 provided on the right side surface 1a of the process unit 1 pass through the notches 58d and 58e when the toner cartridge 7 is mounted on the process unit 1. In the present embodiment, notches 58d and 58e are formed in the circumferential center portions of the outer wall 581 and the inner wall 582 of the first fitting portion.

  The depth of the notch 58d in the inner wall 582 is greater than the depth of the notch 58e in the outer wall 581. Therefore, the portion where the notch 58d of the end surface of the inner wall 582 is formed forms the lower step portion (low in height) closest to the bottom plate portion 58a among the end surface of the outer wall 581 and the end surface of the inner wall 582. The portion where the notch 58e of the end surface is formed forms the middle step portion next to the bottom plate portion 58a. The end surface of the outer wall 581 and the end surface of the inner wall 582 excluding the low step portion 58d and the middle step portion 58e constitute a high step portion 58f farthest from the bottom plate portion 58a. Note that the end surfaces of the outer wall 581 and the inner wall 582 at both ends in the circumferential direction can be tapered so that the height decreases toward the tip side.

  When the toner cartridge 7 is attached to the process unit 1, the height of the low step portion 58d can pass through the protrusion 66 formed on the right side surface 1a of the process unit 1 without contacting the end surface of the low step portion 58e. Is set as follows. On the other hand, the height of the middle step 58e is such that the protrusion 66 interferes with the end surface of the middle step 58e when the toner cartridge 7 is mounted, and the middle step 58e is elastically deformed as the protrusion 66 passes. Is set.

Next, the configuration of the second fitting portion 34 will be described in detail.
As shown in FIG. 9, the outer wall 341 formed in the second fitting portion 34 is formed in a cylindrical surface shape whose entire outer peripheral surface is centered on the rotation center of the support shaft 35. The second fitting surface 34c, which is the inner peripheral surface of the inner wall 342, has the same shape as the first fitting surface 58c. That is, the circumferential center portion of the second fitting surface 34c forms a cylindrical fitting surface coaxial with the outer circumferential surface of the outer wall 341, and both ends thereof form a flat non-cylindrical fitting surface.

  As shown in FIG. 32, a cutout 34 d is provided in each circumferential end region of each end surface of the outer wall 341 and the inner wall 342 of the second fitting portion 34. Similar to the first fitting portion 58, the notch 34 d is formed so that the protrusion 67 provided on the left side surface 1 b of the process unit 1 passes through the notch 34 d when the toner cartridge 7 is attached to the process unit 1. Provided at various positions. In the first fitting portion 58, notches 58 d and 58 e are provided in the outer wall 581 and the inner wall 582 only in the center portion in the circumferential direction, but in the second fitting portion 34, one of the outer wall 341 and the inner wall 342 is surrounded. A region from the central portion in the direction to one end is a notch 34d.

  The notch depth of the notch 34d provided in the outer wall 341 and the inner wall 342 of the second fitting portion 34 is the same. Therefore, the notches 34d constitute not a middle step portion that interferes with the protruding portion 67 but a low step portion that does not contact the protruding portion 67. The end surface of the outer wall 581 excluding the low step portion 34d and the end surface of the inner wall 582 constitute a high step portion 34f farthest from the bottom plate portion 58a. In addition, the area | region to the other front-end | tip of the outer wall 341 and the inner wall 342 can be made into the taper surface shape where height becomes low as the said front end side.

Hereinafter, an operation when the toner cartridge 7 is attached to the process unit 1 will be described.
The toner cartridge 7 is lowered from the upper side by the operator and attached to the process unit 1. At this time, as shown in FIG. 36 (a), since the inclinations of the support portions 33, 54 and the first fitting surface 58c and the second fitting surface 34c coincide with each other, the support portions 33, 54 are made smooth. It can be guided into the first fitting surface 58c and the second fitting surface 34c. Further, since the width W1 between the connection surfaces 63 of the support portions 33 and 54 is smaller than the width W2 of the open portion of the first fitting surface 58c and the second fitting surface 34c, the direction in which the toner cartridge is lowered is slightly shifted. In addition, the support portions 33 and 54 can be reliably guided into the first fitting surface 58c and the second fitting surface 34c.

  When the toner cartridge 7 is pushed to the specified position of the process unit 1, as shown in FIG. 36 (a), the upper cylindrical surface portion 62 of the support portions 33 and 54 is formed on the first fitting surface 58c and the second fitting surface 34c. The cylindrical fitting surface 34c2 is in a cylindrical fitting state. In this state, as shown in FIGS. 33 (a) and 33 (b), the protrusions 66 and 67 remain on the outer peripheral surface of the first fitting portion 58 (even before the operation member 26 is rotated in the forward direction to be locked). The outer peripheral surface of the outer wall 581) is constrained from above. For this reason, the toner cartridge 7 is in a temporarily held state in which upward withdrawal is restricted. Since the toner cartridge 7 is temporarily held in this way, even if the operator carries the process unit 1 in a state where the toner cartridge 7 is set in the process unit 1 and forgets to lock it, the toner cartridge 7 is transported during transportation. Can be prevented from being separated from the process unit 1. Therefore, the leakage and scattering of toner due to the separation of both are prevented.

  At this time, the protruding portion 66 shown in FIG. 33A applies a restraining force toward the obliquely downward direction to the first fitting portion 58, and the protruding portion 67 shown in FIG. A restraining force directed downward is given. In this way, by setting the restraining positions of the fitting portions 34 and 58 by the protrusions 66 and 67 on the left and right sides of the toner cartridge 7 at different positions in the circumferential direction, two kinds of restraining forces in different directions are applied to the toner cartridge 7. Therefore, it is possible to make it difficult for the toner cartridge 7 to be separated from the process unit 1 no matter what posture the process unit 1 is carried around.

  In the process of temporarily holding the toner cartridge 7, the protrusion 66 (see FIG. 29) provided on the right side surface of the process unit 1 is the lower step 58 d of the inner wall 582 of the first fitting portion 58 and the middle step 58 e of the outer wall 581. Pass in the order of. At this time, the projecting portion 66 passes through the low step portion 58d without contacting, but the middle step portion 58e is elastically deformed to get over. When the protruding portion 66 gets over the middle step portion 58e as the elastic deformation portion, the deformed step portion 58e is elastically restored, so that the user who wears the toner cartridge 7 can feel a click. With this click feeling, the user can recognize that the toner cartridge is correctly installed, and therefore, it is possible to prevent the toner cartridge 7 from being mounted incorrectly.

  In this embodiment, since the lower step portion 34d of the second fitting portion 34 does not contact the protruding portion 67 (see FIG. 12), a click feeling is generated in the second fitting portion 34 even after the toner cartridge 7 is completely installed. Absent. If it is desired to produce a click feeling in the second fitting portion 34, the outer wall 341 of the second fitting portion 34 may be formed to correspond to the middle step portion 58 e formed in the first fitting portion 58. Good.

  When the operation member 26 is rotated in the forward direction from the temporary holding state described above to the locked state shown in FIGS. 34 (a) and 34 (b), the first fitting portion 58 is shown in FIG. 36 (b). The second fitting portion 34 rotates in the forward direction, and the cylindrical surface portions 62 of both the support portions 33 and 54 are cylindrically fitted to the first fitting surface 58c and the cylindrical fitting surface 34c2 of the second fitting surface 34c. Match. As the first fitting portion 58 and the second fitting portion 34 rotate at this time, the projecting portions 66 and 67 push their first fitting portion 58 and the second fitting portion 34 downward while pressing their outer peripheral surfaces. Slide.

  On the other hand, when removing the toner cartridge 7 from the process unit 1, the operation member 26 is rotated in the reverse direction. Along with this, the first fitting portion 58 and the second fitting portion 34 rotate in the reverse direction, and return to the temporary holding state shown in FIGS. When the protrusions 66 and 67 reach the notches 58e and 34d of the first fitting part 58 and the second fitting part 34, the downward pushing force applied from the protrusions 66 and 67 disappears. The fitting portion 58, the second fitting portion 34, and the toner cartridge 7 are slightly lifted. Therefore, the operator can visually recognize that the toner cartridge 7 is unlocked.

  Since the toner cartridge 7 is fixed with respect to the process unit 1 in the locked state, as shown in FIG. 21, the operator holds the grip portion 25 and attaches the toner cartridge 7 and the process unit 1 to the integrated process cartridge. Can be handled (operating, moving, etc.). At this time, the process cartridge has a corresponding weight due to its own weight and the filled toner. If such a weight is applied to the lock portion 26c1, the lock portion 26c1 is composed of a small protrusion, so that there is a risk that the lock may be released or the lock portion 26c1 may be damaged. Since a part of the weight is received by the first fitting portion 26e and the second fitting portion 34b that are fitted to the support portions 33 and 54 provided in the process unit 1, such a problem is caused. Absent.

  In this locked state, as shown in FIG. 36 (b), the fitting surfaces 34 c and 58 c are in contact with the support portions 33 and 54 at two locations in a state of being fitted to the support portions 33 and 54. As shown in FIG. 21, when the operator holds the grip portion 25 and hangs the process cartridge, one of the contact portions M2 is positioned below the support portions 33 and 54. Since the fitting surfaces 34c and 58c can receive the weight W in the contact portion M2 positioned below, it is possible to reduce the load on the lock portion 26c1 and prevent the lock portion 26c1 from being damaged.

  Further, as shown in FIG. 21, the contact portion M <b> 2 that receives the weight W is located below the rotation center O of the operation member 26 in the vertical direction. For this reason, the vector extension line of the weight W acting on the contact part M2 and the extension line of the lifting force F acting on the contact part M2 when the operator lifts the process cartridge are the rotation center O of the operation member 26 or its extension line. Pass through the neighborhood. As described above, the vector extension lines of the weight W and the lifting force F acting on the contact portion M2 pass through the rotation center O of the operation member 26 or in the vicinity thereof. Acts in a direction different from the rotational direction H of the operating member 26 that releases the locked state of the lock portion 26c1. Thereby, when the operator lifts the process cartridge, the lock is released by the force acting on the operation member 26 at that time, and the toner cartridge 7 and the process unit 1 can be prevented from being separated.

  In this embodiment, the toner cartridge 7 is positioned with respect to the process unit 1 by four positioning portions. Specifically, when the toner cartridge 7 is mounted, first, a pair of positioning protrusions 29 and 31 (see FIGS. 4 and 10) provided on the left and right back sides of the toner cartridge 7 are paired with the pair of process units 1. Positioning is performed by abutting against the abutting portions 30 and 32 (see FIG. 4). Next, in a state where the operation member 26 is fitted to the rotating portion 52 of the linkage member 51 and the opposite fitting member 34 is fitted to the support portion 33 (see FIG. 4) of the process unit 1, 26 is rotated in the locking direction. As a result, the operation member 26 and the second fitting portion 34 rotate, whereby positioning with respect to the rotating portion 52 and the support portion 33 is performed. As described above, in the present embodiment, since the toner cartridge 7 is reliably positioned with respect to the process unit 1 at the four positions (two on the left and right), the process unit 1 is integrated with the toner cartridge 7. Excellent operability when attaching and detaching.

  By the way, when the toner cartridge 7 is set in the process unit 1, it is assumed that the toner cartridge 7 is not pushed to a specified position due to twisting or tilting, and is in a poorly mounted state. In this case, as shown in FIGS. 35 (a) and 35 (b), the protrusions 66 and 67 do not reach the outer peripheral surfaces of the first fitting portion 58 and the second fitting portion 34, and the inner diameter is larger than this outer peripheral surface. For example, it exists between the outer wall and the inner wall on the side. In this poorly mounted state, the fitting portions 34 and 58 are in a poorly fitted state with respect to the support portions 33 and 54. Specifically, as shown in FIG. 37A, the centers O ′ of the support portions 33, 54 are in a state of being misaligned with respect to the centers O of the fitting portions 34, 58 (center of the support shaft 35). . In this state, when the operation member 26 is rotated in the forward direction, the non-cylindrical fitting surfaces 34c1 of the fitting members 34 and 58 contact and interfere with the support portions 33 and 54 as shown in FIG. Thereby, the non-cylindrical fitting surface 34c1 functions as a rotation restricting portion, and restricts further rotation of the operation member 26 in the forward direction. Therefore, even if the operation member 26 is operated, the replenishment toner outlet shutter 43 is not opened, and it is possible to prevent toner leakage when the operation member 26 is operated by mistake.

  If the misalignment between the centers OO ′ is slight, the fitting surfaces 34 c and 54 c are rotated with the support portions 33 and 54 by the rotation of the fitting portions 34 and 58 due to the rotation of the operation member 26 in the positive direction. Even in the case of contact, the fitting portions 34 and 58 spontaneously correct their postures in a direction to eliminate the misalignment by the guiding action of the relief portions 64a provided in the support portions 33 and 54. In this case, the operation member 26 can subsequently be rotated in the forward direction to shift to the locked state, so that it is not necessary to insert the toner cartridge 7 again, and the toner cartridge can be replaced smoothly.

Next, 2nd embodiment of the 1st fitting part 58 and the 2nd fitting part 34 is described based on FIGS. 38-41 (a) (b).
In the first fitting portion 58 of the second embodiment shown in FIG. 39, a tapered surface 58g inclined with respect to the radial direction is interposed between the outer wall 581 and the inner wall 582. The tapered surface 58g rises toward the downstream side in the relative movement direction of the protruding portion 66 with respect to the first fitting portion 58 when the operation member 26 is rotated in the forward direction so as to change from the temporarily held state to the locked state. It is formed in an inclined direction. The outer wall 581 on the upstream side in the relative movement direction of the projecting portion 66 with respect to the tapered surface 58g is a low stepped portion 58d that is deeply cut away, whereby the projecting portion guided to the outer diameter side by the tapered surface 58g. 66 can smoothly move to the outer peripheral surface of the first fitting portion 58 through the low step portion 58d.

  Even if the toner cartridge 7 (before locking) mounted on the process unit 1 has a mounting failure due to the above configuration, and the protrusion 66 exists between the outer wall 581 and the inner wall 582 as shown in FIG. When the operation member 26 is rotated in the forward direction, the protrusion 66 moves relative to the outer wall 581 and the inner wall 582 along a locus drawn by a broken line in FIG. 40A, and is guided by the tapered surface 58g. The outer peripheral surface of one fitting portion 58 is reached. Therefore, it is possible to shift to the normal lock state shown in FIG. Also in this case, by providing the relief portion 64a in the support portion 54, it is possible to avoid interference between the first fitting surface 34c and the support portion 54, and further, regulation of the forward rotation of the operation member 26 due to this interference. . As described above, it is possible to perform the toner cartridge replacement operation more smoothly without the trouble of reinserting the toner cartridge 7.

  FIG. 39 shows a second embodiment of the second fitting portion 34. Also in the second fitting portion 34 of this embodiment, a tapered surface 34g inclined with respect to the radial direction is formed between the outer wall 341 and the inner wall 342. The tapered surface 34g is inclined upward toward the downstream side in the relative movement direction of the protrusion 67 with respect to the second fitting portion 34 when the operation member 26 is rotated in the forward direction so that the temporary holding state is changed to the locked state. It is formed in the direction. The outer wall 3411 on the upstream side in the relative movement direction of the projecting portion 67 with respect to the tapered surface 34g is a low step portion 34d that is notched deeply, and thereby the projecting portion guided to the outer diameter side by the tapered surface 34g. 67 can smoothly move to the outer peripheral surface of the second fitting portion 34 via the low step portion 34d. With this configuration, even if the toner cartridge 7 attached to the process unit 1 (before locking) is defectively mounted, the operating member 26 is rotated in the forward direction in the same manner as the first fitting portion 58, so that the protrusion 67 Moves along the trajectory drawn with a broken line in FIG. 40B, so that the normal locked state shown in FIG.

  The above description is for the case where the toner cartridge 7 (before locking) has a mounting failure. However, in the second embodiment described above, there is no mounting failure when the toner cartridge 7 is mounted, and FIGS. As shown in FIG. 5, when the mounted toner cartridge 7 is temporarily temporarily held, the same effects as those described in the first embodiment can be obtained.

  In addition, this invention is not limited to the above-mentioned embodiment, Of course, a various change can be added in the range which does not deviate from the summary of this invention. The image forming apparatus to which the present invention is applicable is not limited to a monochrome image forming apparatus as shown in FIG. The present invention relates to an indirect transfer type color image forming apparatus for indirectly transferring images on a plurality of photoreceptors 2 to a sheet via an intermediate transfer belt (intermediate transfer member) 60, as shown in FIG. As shown in FIG. 43, the present invention is also applicable to a direct transfer type color image forming apparatus that directly transfers images on a plurality of photoreceptors 2 onto a sheet conveyed by a conveyance belt (conveyance body) 61. . Further, the image forming apparatus to which the present invention can be applied includes a printer, a copying machine, a facsimile, or a complex machine thereof.

1 process unit 2 photoconductor (image carrier)
3 Charging roller (charging means)
4 Developing device (Developing means)
4a Case 5 Cleaning blade (cleaning means)
6 LED head array (exposure means)
7 Toner cartridge (developer container)
DESCRIPTION OF SYMBOLS 8 Toner accommodating part 9 Toner collection | recovery part 10 Transfer apparatus 11 Paper feed apparatus 12 Fixing apparatus 13 Paper discharge apparatus 14 Transfer roller 15 Paper feed cassette 16 Paper feed roller 17 Registration roller 18 Fixing roller 19 Pressure roller 20 Paper discharge roller 21 Paper discharge Tray 22 Container body 25 Holding part 26 Operation member 26c1 Lock part 29 Positioning convex part 30 Abutting part 31 Positioning convex part 32 Abutting part 33 Support part 34 Second fitting part (fitting part)
34c Second fitting surface 34c1 Non-cylindrical fitting surface (rotation restricting portion)
34e Middle stage (elastically deformed part)
34g Tapered surface (guide surface)
35 Support shaft 36 Waste toner introduction port 37 Waste toner inlet shutter 38 Waste toner discharge port 39 Waste toner transport path 40 Waste toner outlet shutter 41 Contact portion 42 Replenishing toner discharge port (discharge port)
43 Supply toner outlet shutter 44 Supply port 45 Supply toner inlet shutter (shutter)
49 drive connection portion 51 linkage member 52 rotation portion 52a convex shape portion 52b shaft portion 53 linear movement portion 53a projection portion 53b guide projection 53c retaining portion 54 support portion 58 first fitting portion (fitting portion)
58c First fitting surface 58g Tapered surface 60 Intermediate transfer belt (intermediate transfer member)
61 Conveyor belt (conveyor)
62 Cylindrical surface portion 63 Connection surface 66 Protruding portion 67 Protruding portion 71 Coil spring (biasing member)
100 apparatus main body (image forming apparatus main body)
A1 Installation direction A2 Removal direction B1 Installation direction B2 Removal direction O Center of rotation of operation member P Paper

JP 2006-235592 A

Claims (10)

A container main body that contains the developer and can be attached to and detached from the developing device side, a discharge port that is provided in the container main body and discharges the developer stored in the container main body, and is attached to the container main body A developer container comprising: a shutter that can open and close the discharge port; and an operation member that is rotatably attached to the container main body and opens and closes the shutter according to the rotation direction thereof.
A developer characterized in that the operation member is provided with a fitting portion that is rotatable in conjunction with the rotation of the operation member and is supported by rotation with a support portion provided on the developing device side. Container.   The developer container according to claim 1, wherein the fitting portion is provided with a rotation restricting portion that restricts rotation of the fitting portion by interfering with the supporting portion when the fitting portion is in a poorly fitted state with the supporting portion. .   A cylindrical fitting surface that is cylindrically fitted to the support portion, and a non-cylindrical fitting surface that extends to at least one circumferential direction of the cylindrical fitting surface and constitutes the rotation restricting portion. The developer container according to claim 2, wherein the developer container is provided.   An elastic deformation portion that engages with a protruding portion provided on the developing device side and elastically deforms when the container main body is mounted on the developing device side, and elastically recovers after passing through the protruding portion. The developer container according to claim 1, which is provided.   The developer container according to claim 4, wherein the fitting portion is restrained by a protruding portion that has passed through the elastic deformation portion.   The developer container according to claim 4 or 5, wherein a guide surface that guides the protruding portion toward the outer diameter side as the fitting portion rotates is provided in the fitting portion.   The developing unit according to claim 1, wherein the developing unit includes at least a developing device having the support portion, and is configured to be detachable from the image forming apparatus main body, and is detachable from the process unit. A process cartridge comprising an agent container.   The process cartridge according to claim 7, wherein the outer peripheral surface of the support portion includes a cylindrical surface portion opposed in the radial direction, and a connection surface that connects the opposed cylindrical surface portions on the inner diameter side of a virtual circle having the same diameter as the cylindrical surface portion. .   The process cartridge according to claim 8, further comprising an image carrier on which a latent image is formed on a surface, wherein developer is supplied from the developing device onto the image carrier.   An image forming apparatus comprising the process cartridge according to claim 9 and an image forming apparatus main body.