阅读说明：本技术 一种处理盒 (Processing box ) 是由 胡亮亮 敖仕平 胡飞 晏梅 邱俊亮 陈绍华 袁双春 于 2019-12-09 设计创作，主要内容包括：本发明公开了一种可拆卸的安装至具有托盘和力施加部件的图像形成装置中的处理盒,包括处理盒框架；感光单元；显影单元,可相对于所述感光单元旋转；处理盒框架具有在长度方向相对设置在驱动侧和导电侧,所述驱动侧设置有驱动所述感光鼓旋转的第一驱动力接收部和驱动所述显影辊旋转的第二驱动力接收部；力接收部,用于接收所述力施加部件的力而使得所述显影单元相对于所述感光单元旋转；所述力接收部具有分隔力接收部,用于接收所述力施加部件的力使得所述显影单元相对于所述所述感光单元旋转；在所述处理盒随所述托盘向所述图像形成装置推入的过程中,所述力接收部可接收所述力施加部件的力而至少在左右方向和/或上下方向上移动。(A process cartridge detachably mountable to an image forming apparatus having a tray and a force applying member includes a process cartridge frame; a light sensing unit; a developing unit rotatable with respect to the photosensitive unit; the process cartridge frame is provided with a driving side and a conductive side which are oppositely arranged in the length direction, wherein the driving side is provided with a first driving force receiving part for driving the photosensitive drum to rotate and a second driving force receiving part for driving the developing roller to rotate; a force receiving portion for receiving a force of the force applying member to rotate the developing unit relative to the photosensitive unit; the force receiving portion has a partitioning force receiving portion for receiving a force of the force applying member so that the developing unit rotates relative to the photosensitive unit; the force receiving portion may receive the force of the force applying member to move at least in a left-right direction and/or an up-down direction in a process in which the process cartridge is pushed in with the tray toward the image forming apparatus.)

1. A process cartridge detachably mountable to an image forming apparatus having therein a force applying member and a movable tray, the tray being movable in a front-rear direction, a direction in which the tray is pushed into the image forming apparatus being front, and a direction in which the tray is pulled out from the image forming apparatus being rear; the processing box can be installed into the tray from top to bottom along the gravity direction, the processing box comprises:

a process cartridge frame;

a photosensitive unit including a rotatable photosensitive drum therein;

a developing unit rotatable with respect to the photosensitive unit and including a rotatable developing roller therein;

the process cartridge frame is provided with a driving side and a conductive side which are oppositely arranged in the left-right direction, and the driving side is provided with a first driving force receiving part for driving the photosensitive drum to rotate and a second driving force receiving part for driving the developing roller to rotate;

a force receiving portion for receiving a force of the force applying member to rotate the developing unit relative to the photosensitive unit;

the force receiving portion has a partitioning force receiving portion for receiving a force of the force applying member so that the developing unit rotates relative to the photosensitive unit;

wherein the force receiving portion is movable in at least a left-right direction and/or a vertical direction by receiving a force of the force applying member in a process in which the process cartridge is pushed into the image forming apparatus with the tray.

2. A process cartridge according to claim 1, wherein said force receiving portion has an attachment guide portion and a detachment guide portion, both of which are engageable with said force applying member so that said force receiving portion is moved at least in a longitudinal direction and/or a gravitational direction of said cartridge frame.

3. A process cartridge according to claim 2, wherein said mounting guide portion is configured as a mounting guide slope, and said dismounting guide portion is configured as a dismounting guide slope, and the mounting guide slope and said dismounting guide slope extend in different directions.

4. A process cartridge according to claim 2, wherein said mounting guide portion and said dismounting guide portion are moved in a direction approaching a left side of said process cartridge and/or a lower side of said process cartridge by being brought into contact with and urged by said force applying member.

5. A process cartridge according to claim 1, wherein said force receiving portion is mounted to said cartridge frame so as to be movable relative to said cartridge frame.

6. A process cartridge according to claim 1, wherein said force receiving portion is fixed to said cartridge frame.

7. A process cartridge according to claim 1, wherein said force receiving portion is provided with a side abutting portion configured to cooperate with said force applying member to temporarily restrict movement of said force receiving portion to the right side when said force receiving portion is moved from the left to the right in said image forming apparatus.

8. A process cartridge according to claim 7, wherein a spacing force receiving portion for receiving a spacing force of said force applying member for spacing said photosensitive drum from said developing roller is provided on said force receiving portion, said spacing force receiving portion being disposed adjacent to and to the left of said side abutting portion.

9. A process cartridge according to claim 2, wherein a spacing force receiving portion for receiving a spacing force of said force applying member for spacing said photosensitive drum from said developing roller is provided on said force receiving portion, said spacing force receiving portion being provided on an upper side of at least a part of said mounting guide portion.

10. A process cartridge according to claim 9, wherein said spacing force receiving portion is provided at a front side of said detachment guide portion.

11. A process cartridge according to claim 1, wherein an elastic member is provided between said force receiving part and said cartridge frame.

12. A process cartridge according to claim 1, wherein a magnetic member is provided between said force receiving part and said cartridge frame.

13. A process cartridge according to claim 1, wherein a slide rail extending in a right-left direction is provided on said cartridge frame, and said force receiving member is provided with a slide guide groove engaging with said slide rail.

Technical Field

The present invention relates to a process cartridge, and more particularly, to a force receiving assembly of a process cartridge detachably mountable in an image forming apparatus.

Background

An example of an image forming apparatus includes an electrophotographic copying machine, an electrophotographic printer (e.g., a laser beam printer, an L ED printer), a facsimile machine, a word processor, and the like.

As shown in fig. 1 to 3, the prior art discloses a process cartridge 50k including a force receiving assembly of a drum unit 31 and a developing unit 41, the process cartridge being mountable in a tray in an image forming apparatus and mountable therewith in the image forming apparatus in a direction D1, the image forming apparatus having a first force applying member 61k and a second force applying member 60k, wherein the first force applying member 61k is rotatably moved in conjunction with an openable door 12 in the image forming apparatus, the second force applying member 60k is movable in a mounting direction D1 of the process cartridge, the process cartridge is provided with a first force receiving portion 75 for receiving a force of the first force applying portion 61k and a second force receiving portion 70 for receiving a force of the second force applying portion 60k, when the process cartridge is mounted in the image forming apparatus, the first force applying portion 61k is rotatably moved and the first force receiving portion 70 is pushed to move by a closing action of the door 12, the first force receiving portion 75 moves to lift the second force receiving portion 70 from the process cartridge housing to engage with the second force applying portion 60k, and when the second force receiving portion 70 receives the force of the second force applying member 60k, the developing unit 41 may be forced to rotate relative to the drum unit 31 so that the developing roller 42 provided in the developing unit 41 and the photosensitive drum 30 provided in the photosensitive unit 31 are separated. The present invention further develops the above-mentioned prior art.

Disclosure of Invention

The invention aims to solve the technical problem that a separation component in the image forming device in the prior art is easy to be blocked when pushing a developing box to rotate.

In order to solve the technical problems, the invention is realized by the following technical scheme:

a process cartridge detachably mountable to an image forming apparatus having therein a force applying member and a movable tray, the tray being movable in a front-rear direction, a direction in which the tray is pushed into the image forming apparatus being front, and a direction in which the tray is pulled out from the image forming apparatus being rear; the processing box can be installed into the tray from top to bottom along the gravity direction, the processing box comprises:

a process cartridge frame;

a photosensitive unit including a rotatable photosensitive drum therein;

a developing unit rotatable with respect to the photosensitive unit and including a rotatable developing roller therein;

the process cartridge frame is provided with a driving side and a conductive side which are oppositely arranged in the left-right direction, and the driving side is provided with a first driving force receiving part for driving the photosensitive drum to rotate and a second driving force receiving part for driving the developing roller to rotate;

a force receiving portion for receiving a force of the force applying member to rotate the developing unit relative to the photosensitive unit;

the force receiving portion has a partitioning force receiving portion for receiving a force of the force applying member so that the developing unit rotates relative to the photosensitive unit;

the force receiving portion may receive the force of the force applying member to move at least in a left-right direction and/or an up-down direction in a process in which the process cartridge is pushed in with the tray toward the image forming apparatus.

Further, the force receiving portion has an attachment guide portion and a detachment guide portion, both of which are engageable with the force applying member so that the force receiving portion moves at least in a longitudinal direction and/or a gravitational direction of the cartridge frame.

Further, the installation guide part is configured as an installation guide inclined plane, the disassembly guide part is configured as a disassembly guide inclined plane, and the installation guide inclined plane and the disassembly guide inclined plane have different extending directions.

Further, the mounting guide portion and the dismounting guide portion are urged by the force applying member by being in contact with the force applying member, and the force receiving member is moved in a direction approaching the left side of the process cartridge and/or the lower side of the process cartridge.

Further, the force receiving portion is mounted on the cartridge frame, which is movable relative to the cartridge frame.

Further, the force receiving portion is fixed to the cartridge frame.

Further, the force receiving portion is provided with a side abutting portion configured to cooperate with the force applying member to temporarily restrict the force receiving portion from moving rightward when the force receiving portion moves leftward and rightward in the image forming apparatus.

Further, the force receiving portion is provided with a spacing force receiving portion for receiving a spacing force of the force applying member for spacing the photosensitive drum from the developing roller, and the spacing force receiving portion is provided adjacent to the side abutting portion and on the left side of the side abutting portion.

Further, the force receiving portion is provided thereon with a spacing force receiving portion that receives a spacing force of the force applying member separating the photosensitive drum and the developing roller, the spacing force receiving portion being provided on an upper side of at least a part of the mounting guide portion.

Further, the spacing force receiving part is provided at a front side of the detachment guide part.

Further, an elastic member is provided between the force receiving part and the cartridge frame.

Further, a magnetic member is provided between the force receiving part and the cartridge frame

Further, a slide guide rail extending in the left-right direction is provided on the process cartridge frame, and the force receiving member is provided with a slide guide groove that is fitted with the slide guide rail.

After the technical scheme is adopted, the invention provides the processing box, the force receiving part moves to avoid the interference problem between the force receiving part and the force applying component in the image forming device in the installation process of the processing box through the cooperation between the force receiving part and the force applying component in the installation process of the processing box, the movement of the force receiving component is smooth, and when the developing unit of the processing box is stressed to rotate relative to the photosensitive drum, the force receiving component can stably cooperate with the force applying component in the image forming device to receive the force of the separation of the drum roller.

Description of the drawings:

FIG. 1 is a schematic view of a prior art process cartridge mounted to an image forming apparatus;

fig. 2 and 3 are schematic views of a process cartridge according to the prior art in cooperation with a force applying mechanism in image formation;

FIG. 4 is a schematic structural view of a process cartridge according to embodiment 1 of the invention;

FIG. 5 is an exploded schematic view of the driving side of the developing unit in embodiment 1 of the invention;

fig. 6 is an exploded view of a force receiving unit according to embodiment 1 of the present invention;

fig. 7 is a partially exploded schematic view of a force-receiving member in embodiment 1 of the present invention;

fig. 8 to 10 are schematic views showing a process in which the process cartridge is engaged with the force applying mechanism in image formation in embodiment 1 of the present invention;

fig. 11 to 13 are schematic perspective views of the process cartridge and the force applying mechanism in image formation according to embodiment 1 of the present invention;

fig. 14 is a partially exploded schematic view of a force receiving member in embodiment 2 of the invention;

FIG. 15 is an exploded perspective view of the driving side of the process cartridge in embodiment 3 of the invention;

FIG. 16 is an exploded perspective view of the first force-receiving portion and the intermediate member in accordance with embodiment 3 of the present invention;

fig. 17 is a partially exploded schematic view of a force-receiving member in embodiment 3 of the invention;

fig. 18 is a partial structural view of a force receiving member in embodiment 4 of the invention;

fig. 19 is an exploded view of a force receiving unit according to embodiment 4 of the present invention;

FIG. 20 is a partially exploded perspective view of a force receiving unit according to embodiment 4 of the present invention;

fig. 21 and 22 are schematic views of partially exploded structures of a force receiving assembly in embodiment 5 of the invention;

FIG. 23 is a partial receiving schematic view at the force receiving assembly in embodiment 7 of the present invention;

fig. 24 is an exploded view of the housing shift mechanism in embodiment 7 of the present invention;

FIG. 25 is an exploded perspective view of the first force-receiving part in accordance with embodiment 7 of the present invention;

FIG. 26 is a schematic view showing the entire construction of a cartridge in embodiment 8 of the invention;

FIG. 27 is a partial enlarged view of the second force receiving portion in the embodiment 8 of the present invention;

FIG. 28 is a schematic view showing a partially exploded view of the conductive side of the process cartridge in embodiment 8 of the invention;

FIG. 29 is a partial schematic structural view of the electrically conductive side of the process cartridge mounted in the tray in embodiment 8 of the present invention;

FIGS. 30 and 31 are schematic structural views showing different states in which the process cartridge is mounted in the image forming apparatus with the tray in embodiment 8 of the present invention;

FIGS. 32 and 33 are schematic structural views showing a first state in which the second force receiving portion is engaged with the second force applying member in the image forming apparatus in embodiment 8 of the present invention;

FIGS. 34 and 35 are schematic views showing a second state in which the second force receiving portion is engaged with the second force applying member in the image forming apparatus and receives the spacing force in embodiment 8 of the present invention;

FIG. 36 is a schematic configuration view of a process cartridge detached from an image forming apparatus in embodiment 8 of the present invention;

FIG. 37 is a partial structure view of the second force receiving portion in embodiment 9 of the present invention;

FIG. 38 is a schematic view of a partially exploded structure at the second force receiving portion in embodiment 9 of the present invention;

FIG. 39 is a schematic view of a partially exploded structure of the second force receiving portion in the embodiment 10 of the present invention;

FIG. 40 is a schematic structural view showing mounting of the process cartridge to the image forming apparatus in embodiment 11 of the present invention;

FIG. 41 is an enlarged schematic view of the second force receiving section in embodiment 11 of the present invention;

FIGS. 42 to 44 are exploded views showing the mounting of the second force receiving portion to the process cartridge in embodiment 11 of the present invention;

fig. 45 is a partial structural view at the force receiving part in embodiment 12 of the invention;

fig. 46 is a partial exploded view of the force receiving part in embodiment 12 of the invention;

fig. 47 is a partial structural view at a force receiving member in embodiment 13 of the invention;

fig. 48 is a partial structural view at the force receiving part in embodiment 14 of the invention;

fig. 49 is a partial structural view at the force receiving part in embodiment 15 of the invention;

fig. 50 is a partially exploded view of the force receiving part in embodiment 16 of the present invention.

The specific implementation mode is as follows:

embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

< example 1>

As shown in fig. 1, the image forming apparatus includes: tray 13, first force applying part 61, second force applying part 60, door 12.

As shown in fig. 4 to 7, the process cartridge of the present embodiment includes a drum unit 31 and a developing unit 41, the drum unit 31 includes a first driving force receiving portion 10 for driving a photosensitive drum 30 provided in the drum unit 31, and the developing unit 41 is provided therein with a second driving force receiving portion 11 for driving a developing roller 42 provided in the developing unit 31.

The developing unit 41 includes a force receiving member 80, and the force receiving member 80 includes a first force receiving portion 81, a second force receiving portion 85. The developing frame includes a side cover 54, a driving bracket 53, a supporting bracket 52, and a main body frame 51. Among them, the side cover 54 is disposed at the outermost side of the driving side of the developing unit, the driving bracket 53 is disposed at a side of the side cover 54 close to the inner side in the longitudinal direction of the developing unit, the supporting bracket 52 is disposed at a side of the driving bracket 53 close to the inner side in the longitudinal direction of the developing unit, and the supporting bracket 52 is directly mounted on the main body frame 51 of the developing unit 41. The first force receiving portion 81 and the second force receiving portion 85 are provided on the support bracket 52 in the present embodiment, and specifically, the first mounting groove 52a and the second mounting groove 52b are formed on the support bracket 52, the extending directions of the first mounting groove 52a and the second mounting groove 52b are different, preferably, the extending direction of the second mounting groove 52b is parallel to the axis of the developing roller 42, and the extending directions of the first mounting groove 52a and the second mounting groove 52b are 90 degrees. The second force receiving portion 85 is mounted on one slide base 88, a slide groove 88a is provided on the top surface of the slide base 88, the second force receiving portion 85 is mounted in the slide groove 88a, and in order to prevent the second force receiving portion 85 from coming off the slide groove 88a, it is preferable that the second force receiving portion 85 is formed in a T-shaped structure, and a T-shaped groove matching the T-shaped structure is provided in the slide groove 88 a. The first elastic member 87 is disposed between the slide base 88 and the second force receiving portion 85 with one end abutting the inner wall of the slide groove 88a and the other end abutting the second force receiving portion 85. The driving bracket 53 is provided with a third mounting groove 53a, the second mounting groove 52b and the third mounting groove 53a jointly form a sliding space of the sliding base 88, a second elastic member 86 is arranged between the sliding base 88 and the driving bracket 53, one end of the second elastic member 86 is abutted on the inner wall of the third mounting groove 53a, and the other end is abutted on the outer surface of the sliding base 88. The slide base 88 is movable relative to the developing frame of the developing unit 41, and the second force receiving portion 85 is movable relative to the slide base 88, and preferably, the extending directions of the moving directions of the slide base 88 and the second force receiving portion 85 are set in parallel.

The first force receiving portion 81 is provided with an urging portion 81a, the slide base 88 is provided with an urging portion 88c, and preferably both the urging portion 81a and the urging portion 88c are provided as inclined surfaces, and the sliding directions of the respective members can be changed by the cooperation of the urging portion 81a and the urging portion 88c, and in the present embodiment, it is preferable that the first force receiving portion 81 slides in a direction substantially perpendicular to the axial direction of the developing roller 42, and the slide base 88 slides in a direction orthogonal to the sliding direction of the first force receiving portion 81.

Next, a process of mounting the process cartridge into the image forming apparatus and a process of separating the drum roller of the present invention will be described with reference to fig. 6 to 13.

The longitudinal direction of the developing unit 41 is the axial direction of the developing roller 42, first, the process cartridge is loaded into the image forming apparatus with the tray and mounted to a preset position, the first force applying portion 61 is rotated to press the first force receiving portion 81 with the closing of the door cover 12 in the image forming apparatus, the first force receiving portion 81 is moved to press the forced push portion 88c by the forced push portion 81a, the slide base 88 is moved from a position away from the side cover 54 to a position close to the side cover 54 against the elastic force of the second elastic member 86, the second force receiving portion 85 is slid together with the slide base 88 until the first force receiving portion 85 comes into contact with the second force applying portion 60 in the image forming apparatus, specifically, the second force applying member 60 comes into contact with the second force receiving portion 85 in the longitudinal direction of the developing unit and is arranged to overlap back and forth in the longitudinal direction, at which time, the first force applying portion 61 continues to push the first force receiving portion 81 to move, the slide base 88 continues to slide in the longitudinal direction of the developing unit, the second force receiving portion 85 is blocked by the second force applying portion 60 to stop sliding, the first elastic member 87 is compressed, and the second force receiving portion 85 has a tendency to move closer to the second force applying member 60 with respect to the second force applying member 60 by the elastic force of the first elastic member 87. Subsequently, the machine is operated in advance, the second force applying member 60 is moved in the direction E in fig. 9, the second force applying member 60 cancels the blocking of the second force receiving portion 85 as viewed in the longitudinal direction of the developing unit, the second force receiving portion 85 is moved in the longitudinal direction of the developing unit 41 by the elastic force of the first elastic member 87, the second force receiving portion 85 enters a space overlapping the second force applying member 60 in the longitudinal direction of the developing unit 41, and the second force applying member 60 applies a force to the second force receiving portion 85 to separate the developing roller 42 from the photosensitive drum 30 after the image forming apparatus drives the second force applying member 60 to move in the direction B in fig. 10. When the door cover 12 in the image forming apparatus is opened, the first force applying member 61 is rotated upward to cancel the pressing force to the first force receiving portion 81, the first force receiving portion 81 cancels the pressing force to the slide base 88, and the second force receiving portion 85 is returned to a position further away from the side cover 54 as the slide base 88 is urged by the elastic force of the second elastic member 86, and at this time, the second force receiving portion 85 and the second force applying member 60 are in a non-overlapping position in the longitudinal direction of the developing unit, and the developing cartridge can be taken out smoothly.

< example 2>

Next, embodiment 2 of the present invention will be described, and as shown in fig. 14, embodiment 2 of the process cartridge of the present invention is different from embodiment 1 in the internal structure of the force receiving member.

As shown in fig. 14, with respect to embodiment 1, the second force receiving portion 85 in the force receiving assembly in the present embodiment is provided as an integral structure, the second force receiving portion 85 includes a forced push portion 85c and a force receiving portion 85a, the first force receiving portion 81 is provided with an elastic portion 81b, when the force receiving portion 85a is blocked by contact with the second force applying member 60, the elastic force is provided by deformation of the elastic portion 81b of the first force receiving portion 81 so that the force receiving portion 85a has a tendency to move closer to the second force applying member 60 with respect to the second force applying member 60, preferably, in order to reinforce the elastic force and stability of the above elastic portion 81b, the third elastic member 82 is added to the elastic portion 81b, and alternatively, the elastic force may be provided directly by the third elastic member 82 instead of the elastic portion 81 b.

< example 3>

The following describes embodiment 3 of the present invention. The first force receiving portion in the present embodiment does not receive the force of the first force applying member in the image forming apparatus that is linked with the door cover.

Specifically, as shown in fig. 15 to 17, since the tray 13 carries the cassette down in the H direction in fig. 16 in the process of closing the door 12 of the image forming apparatus, by this action, the first force receiving portion 8101 and the intermediate member 8102 are provided. The first force receiving portion 8101 extends substantially in a descending direction of the developing unit, the intermediate member 8102 is rotatable about a projection column 55a provided on the photosensitive unit holder 55, and specifically, a hole 8102a provided on the intermediate member 8102 is engaged with the projection column 55a so that the intermediate member 8102 is rotatable about the projection column 55 a. When the developing unit is lowered in the H direction, the first force receiving portion 8101 engages with a force applying member (not shown in the drawings) located at the bottom in the image forming apparatus, the first force receiving portion 8101 is lifted, the first force receiving portion 8101 urges the intermediate member 8102 to rotate, the urging portion 8102b provided on the intermediate member 8102 contacts with the urging portion 88c1 provided on the slide base 88 and causes the second force receiving portion 85 to move closer to the second force applying member 60. Thereafter, the process in which the second force applying member 60 engages with the second force receiving portion 85 and applies a force such that the developing roller in the developing unit is separated from the photosensitive drum in the photosensitive unit is similar to that in embodiment 1. When the door 12 is opened, the tray 13 moves the developing unit 13 upward, the image forming apparatus cancels the pressing of the first force receiving portion 8101, the second force receiving portion 85 returns under the elastic force of the second elastic member 86, and the developing unit can be smoothly taken out.

< example 4>

Referring to embodiment 4 of the present invention, as shown in fig. 18, the second force receiving portion 85 is rotatably provided in this embodiment, specifically, a rotation fulcrum is provided on the developing frame of the developing unit 41 to allow the second force receiving portion 85 to rotate, the second force receiving portion 85 is mounted on the rotation fulcrum, when the process cartridge is not mounted in the image forming apparatus, the second force receiving portion 85 is located at a position protruding out of the developing frame, when the process cartridge is mounted in the image forming apparatus, the first force receiving portion 81 receives the force of the first force applying portion 61 in the image forming apparatus and moves, as the door 12 is closed, the second force receiving portion 85 receives the force from the first force receiving portion 81 and rotationally moves from an initial position, specifically, the force receiving portion of the force receiving portion 85 rotates in a direction approaching the side cover 54, and the position after the rotation of the second force receiving portion 85 is located at the height direction of the process cartridge and the second force applying member 60 The height direction may be a direction in which the process cartridge ascends or descends with the tray 13 in the image forming apparatus, in other words, a gravity direction, the second force receiving portion 85 receives a force after the second force receiving portion 85 receives the force of the second force applying member 60, and in the gravity direction, a position of the second force receiving portion 85 after the force receiving portion 81 receives the force of the first force applying member 61 to force the second force receiving portion 85 to move is lower in height than a position before the movement in the gravity direction, the position before the movement being a position of the force receiving portion of the second force receiving portion 85 in the gravity direction after the force receiving portion 81 receives the force of the first force applying member 61 to force the second force receiving portion 85 to move, the position before the movement being a position of the force receiving portion of the second force receiving portion 85 in the gravity direction in a free state, that is, when the first force receiving portion 81 does not receive the external force. Preferably, the second force receiving portion 85 may have an arc-shaped contour at a portion protruding outside the developing frame, and specifically, the second force receiving portion 85 may be provided in a sector shape, so that when the second force receiving portion 85 rotates, the second force receiving portion 85 may be more stably engaged with the second force applying portion 81 due to the arc-shaped contour, and the mechanical strength of the second force receiving portion 85 may be enhanced.

As shown in fig. 19 and 20, in the present embodiment, a laterally protruding forced pushing portion 85c is formed on the second force receiving portion 85, and preferably, the protruding direction of the forced pushing portion 85c is a direction close to the edge cover 54. When the first force receiving portion 81 receives the force of the first force applying portion 61 and moves closer to the second force receiving portion 85, the urging surface 81a of the first force receiving portion 81 presses the urging portion 85c so that the force receiving portion of the second force receiving portion 85 rotates in the R direction, and when the external force on the first force receiving portion 81 is cancelled, the second force receiving portion 85 returns to the free state by the elastic force of the second elastic member 87.

< example 5>

Describing embodiment 5 of the present invention, as shown in fig. 21 and 22, the first force receiving portion 81 is eliminated in the present embodiment, the second force receiving portion 85 is made movable in the gravitational direction or in the longitudinal direction of the process cartridge, when the second force receiving portion 85 is moved in the longitudinal direction of the process cartridge, as shown in fig. 21, the side of the second force receiving portion 85 close to the side cover 54 is provided with the first inclined surface 85e and the second inclined surface 85f, the fourth elastic member 89 is provided on the side of the second force receiving portion 85 away from the frame 54, with the abutment of the second inclined surface 85f with the first force applying member 61, the second force receiving portion 85 can be urged to move to the side away from the side cover 54 against the elastic force of the fourth elastic member 89 to pass over the first force applying portion 61, and then the second force receiving portion 85 moves to the second force applying member 60 under the elastic force of the fourth elastic member 89 to receive the force for separating the developing roller 42 and the photosensitive drum 30, the process cartridge can be made to pass over the first force receiving member 81 at the time of taking out by the first inclined surface 85 e. Considering that the second inclined surface 85f may slide relative to the second force applying part 60 without separating the developing roller 42 and the photosensitive drum 30 in the case where the second force applying member 60 applies pressure to the second inclined surface 85f, in the present embodiment, the elastic force of the fourth elastic member 89 is set to provide an elastic force to block the movement of the second force receiving part 85 when the second force applying member 60 presses the second force receiving part 85 so that the second force receiving part 85 can receive a force to separate the developing roller and the photosensitive drum.

When the second force receiving portion 85 is moved in the direction of gravity, as shown in fig. 22, it is similar to the manner in which the second force receiving portion 85 is provided to move in the longitudinal direction, except that inclined surfaces 85e, 85f provided at the second force receiving portion 85 are provided at the tip end of the second force receiving portion 85 in the direction of gravity, the direction of movement of the second force receiving portion 85 is also provided along the direction of gravity, and when the process cartridge is mounted and removed, the inclined surface of the second force receiving portion 85 contacts the first force applying portion 61 in the direction of gravity and allows the second force receiving portion 85 to pass over the first force applying portion.

< example 6>

In embodiment 6 of the present invention, in which the second force receiving portion 85 is directly fixedly mounted on the developing frame, the second force receiving portion 85 is made of an elastic material, when the process cartridge moves along the tray 13 in the tray advancing direction D1, the second force receiving portion 85 made of an elastic material can be elastically deformed by being pressed by the first force applying member 61 and the second force applying member 60 in the image forming apparatus until finally abutting on the second force applying member 60, at which time the second force receiving portion 85 elastically abuts on the second force applying member 60, when the second force applying member 60 moves in the B direction (refer to fig. 9), as long as the elastic deformation force of the second force applying portion 60 is set to be larger than the urging force urging the developing roller 42 to contact the photosensitive drum 30, when the second force receiving portion 85 receives the force of the second force applying member 60, the developing roller 42 can be spaced apart from the photosensitive drum 30, even if the second force receiving portion 85 has been elastically deformed during the above, the developing roller 42 and the photosensitive drum 30 can be separated by a small distance, thereby avoiding contact of the developing roller 42 and the photosensitive drum 30. Alternatively, the second force receiving portion 85 may not be completely fixedly mounted on the developing frame, and may be allowed to have a small amount of movement relative to the developing frame to improve the smoothness of the mounting and removal of the process cartridge, and the range may be set only with reference to the range such that the second force receiving portion 85 can receive the force of the second force applying portion 60 to force the developing roller 42 to be separated from the photosensitive drum 30.

< example 7>

Next, embodiment 7 of the present invention will be described, and as shown in fig. 23 to 25, embodiment 7 of the present invention is shown in which the second force receiving portion 85 is integrally formed with or fixedly mounted on the developing frame.

As shown in fig. 23 to 25, in the present embodiment, the process cartridge has a casing biasing mechanism including a biasing elastic member 92 and a biasing abutting block 91, a hole 54a through which the biasing abutting block 91 can pass is provided in the edge cover 54, the biasing elastic member 92 abuts the developing frame at one end and the biasing abutting block 91 at the other end, a lower side of the biasing abutting block 91 is provided with a lead-in slope 91a, when the process cartridge is mounted in the tray 13, the lead-in slope 91a can come into contact with an inner side wall of the tray 13 and urge the process cartridge toward a side away from the first force applying member 61 and the second force applying member 60 in the image forming apparatus by the biasing elastic member 92, after the process cartridge is urged, the second force receiving portion 85 is on the side of the second force applying member 60 in the longitudinal direction of the process cartridge, the second force receiving portion 85 avoids interference with the second force applying portion 60 in the urging direction D1 of the tray 13, the process cartridge can be smoothly mounted into the image forming apparatus following the tray 13. When the process cartridge is mounted into the image forming apparatus following the tray 13 to a predetermined position, the first force applying part 61 is rotationally moved downward as the door cover 12 in the image forming apparatus is closed, a force receiving surface 81a1 is provided on the first force receiving part 81 on the process cartridge, the force receiving surface 81a1 receives a force applied by the downward rotational movement of the first force applying part 61, a rotational mounting hole 81a2 and a return elastic member abutting part 81a3 are further provided on the first force receiving part 81, a return elastic member 93 is provided between the first force receiving part 81 and the process cartridge frame, a rotational mounting post 54b is provided on the side cover 54, the rotational mounting hole 81a2 is mounted into the rotational mounting post 54b, the return elastic member 93 abuts the return elastic member abutting part 81a3 of the first force receiving part 81 at one end and the process cartridge frame at the other end, the elastic force of the return elastic member 93 is set to be larger than the elastic force of the biasing elastic member 92, when the first force applying member 60 applies a force to the first force receiving portion 81, the first force receiving portion 81 applies a force to the cartridge frame by the return elastic member 93 so that the cartridge frame moves close to the second force applying member 60 in the longitudinal direction of the cartridge. As in the above embodiment, when the image forming apparatus is not pre-operated, as the process cartridge frame moves closer to the second force applying member 60 in the longitudinal direction of the process cartridge, the second force receiving part 85 is blocked by the second force applying member 60 during the movement and abuts against the second force applying member 60, at this time, the first force receiving part 81 has received the force of the first force applying member 61 and rotates to a preset position about the rotation mounting post 54b, the return elastic member 93 is compressed to accumulate elastic potential energy, when the image forming apparatus starts pre-operation, the second force applying member 60 moves in the retracting direction of the tray 13, the blocking of the second force receiving part 85 by the second force applying member 60 is released, the process cartridge frame is forced to move closer to the second force applying member 60 by the elastic potential energy accumulated by the return elastic member 93, since the elastic force of the return elastic member 93 is set to be larger than the elastic force of the biasing elastic member 92, the process cartridge frame is moved closer to the second force applying member 60 against the elastic force of the biasing elastic member 92, the second force receiving portion 85 moves together with the process cartridge frame to a position overlapping the second force applying member 60 in the push-in direction D1 of the tray 13, and then the image forming apparatus continues to pre-operate, the second force applying member 60 moves in the direction of the elongation direction D2 of the tray 13 and pushes the second force receiving portion 85 to move so that the developing roller is spaced apart from the photosensitive drum. When it is necessary to take out the process cartridge, the door 12 is opened, the first force applying member 61 releases the force to the first force receiving portion 80, the pressing of the return elastic member 93 by the first force receiving portion 80 is released immediately, the process cartridge is moved away from the second force applying member 60 by the elastic force of the biasing elastic member 92, the overlap of the second force receiving portion 85 with the second force applying member 60 in the direction of the pull direction D2 of the tray 13 is released, and the process cartridge can be smoothly pulled out following the tray 13.