阅读说明：本技术 显影盒 (Developing box ) 是由 范文燚 张玉萍 黄林 于 2021-04-07 设计创作，主要内容包括：本发明涉及一种显影盒,包括盒体、显影辊、把手构件和活动构件；其中,把手构件能够在第一位置和第二位置之间运动,活动构件能够在第三位置和第四位置之间运动；在显影辊的长度方向上,活动构件的自由端部在第四位置从盒体伸出,且比在第三位置更加远离把手构件；把手构件的运动关联于活动构件的运动。本发明的显影盒具有便于拆机和装机的优点。(The invention relates to a developing box, comprising a box body, a developing roller, a handle component and a movable component; wherein the handle member is movable between a first position and a second position, and the movable member is movable between a third position and a fourth position; the free end portion of the movable member protrudes from the cartridge body in the length direction of the developing roller at a fourth position and is further away from the handle member than at the third position; movement of the handle member is associated with movement of the movable member. The developing box of the invention has the advantage of being convenient for disassembling and assembling.)

1. A developing cartridge includes a cartridge body and a developing roller; wherein the developing cartridge further comprises:

a handle member movable between a first position and a second position;

a movable member provided on the case and movable between a third position and a fourth position; a free end portion of the movable member, in a length direction of the developing roller, protruding out of the cartridge body at the fourth position and farther from the handle member than at the third position;

wherein movement of the handle member is associated with movement of the movable member.

2. A developing cartridge according to claim 1; wherein the handle member is provided to rotate between the first position and the second position, and a rotation axis of the handle member is provided parallel to the developing roller.

3. A developing cartridge according to claim 1; wherein the handle member is configured to translate between the first position and the second position, a direction of translation of the handle member being perpendicular to a length direction of the developer roller.

4. A developing cartridge according to claim 1; wherein the handle member protrudes more from the cartridge body at the first position than at the second position on a side of the cartridge body away from the developing roller.

5. A developing cartridge according to claim 1; wherein the movable member is provided to move in a lengthwise direction of the developing roller by being urged by the handle member.

6. A developing cartridge according to claim 1; wherein the movable member moves from the third position to the fourth position when the handle member moves from the first position to the second position.

7. A developing cartridge according to claim 1; wherein in the third position the free end of the movable member is retracted into the cassette.

8. A developing cartridge according to claim 1; wherein the free end of the movable member has a tapered surface or a slant surface.

9. A developing cartridge according to claim 1; wherein, be equipped with first spout on handle component with one in the movable member, be equipped with first slip arch on handle component with another in the movable member, first spout for the developer roll slope sets up, first slip arch sets up in the first spout.

10. A developing cartridge according to claim 9; wherein the first sliding groove is provided on the handle member, and the first sliding projection is provided on the movable member.

11. A developing cartridge according to claim 1; and a rocker member is arranged between the handle member and the movable member, the rocker member is obliquely arranged relative to the developing roller, and two ends of the rocker member are respectively connected with the handle member and the movable member in a rotating manner.

12. A developing cartridge according to claim 11; the handle component is provided with a first sliding protrusion which is rotatably connected with the first sliding groove, and the movable component is provided with a second sliding protrusion which is rotatably connected with the second sliding groove.

13. A developing cartridge according to claim 1; wherein a retaining mechanism is included for retaining the handle member and the movable member in respective positions.

14. A developing cartridge according to claim 13; wherein the retaining mechanism is disposed between the movable member and the cartridge.

15. A developing cartridge according to claim 14; wherein the holding mechanism comprises an elastic limiting part arranged on the movable component, a first concave part and a second concave part arranged on the box body, and the elastic limiting part is arranged in the first concave part or the second concave part so as to hold the handle component and the movable component at corresponding positions.

16. A developing cartridge according to claim 1; wherein the movable member is rotatably connected to the case and is rotatable between the third position and the fourth position; the movable member is connected with the handle member through a linkage mechanism, and when the handle member moves from the first position to the second position, the movable member is driven to rotate from the third position to the fourth position through the linkage mechanism.

17. A developing cartridge according to claim 16, wherein said link mechanism includes:

the translation component is connected with the handle component and can move along the length direction of the developing roller under the driving of the handle component;

a connecting member, both ends of which are respectively connected with the translation member and the movable member in a rotating way;

when the handle component moves from the first position to the second position, the translation component moves towards the inner side of the box body along the length direction of the developing roller, and the movable component is driven to rotate from the third position to the fourth position through the connecting component.

18. A developing cartridge according to claim 17; the handle component is provided with a fourth sliding chute which is obliquely arranged relative to the developing roller, the translation component is provided with a fourth sliding bulge, and the fourth sliding bulge is arranged in the fourth sliding chute.

19. A developing cartridge according to claim 17; wherein a retaining mechanism is provided between the translating member and the cassette for retaining the handle member and the movable member in respective positions.

20. A developing cartridge according to claim 1; wherein the handle member is provided on a side of the cartridge body away from the developing roller; the handle member is located at the middle of the cartridge body in the length direction of the developing roller, and the movable members are symmetrically disposed at opposite sides of the handle member.

Technical Field

The present invention relates to a developing cartridge for an electrophotographic image forming apparatus.

Background

The developing cartridge is generally detachably mounted to an electrophotographic image forming apparatus such as a laser printer, a copying machine, a facsimile machine, or the like. In the case of contact development, a developing roller of a developing cartridge supplies developer to a photosensitive drum by contacting the photosensitive drum at the time of an image forming job to develop an electrostatic latent image on the photosensitive drum.

During non-imaging operations (e.g., when cleaning the photosensitive drum), the developer roller is typically controlled to separate from the photosensitive drum to avoid degradation of image quality due to prolonged contact of the developer roller with the photosensitive drum. Therefore, a separation/contact mechanism for bringing the developing roller and the photosensitive drum into contact at the time of an image forming job and separating at the time of a non-image forming job is generally provided in the electrophotographic image forming apparatus.

A developing cartridge of the related art includes a handle member and fixing projections provided at both longitudinal ends of a cartridge body, respectively, the fixing projections projecting from the cartridge body in the longitudinal direction and being integrally formed with the cartridge body. After the developing cartridge is mounted to the electrophotographic image forming apparatus, a separation/contact mechanism in the electrophotographic image forming apparatus may act on the fixing projection to change the position of the developing cartridge relative to the photosensitive drum so that the developing roller moves between a separation position of separation from the photosensitive drum and a contact position of contact with the photosensitive drum.

The above-described developing cartridge is liable to cause such a problem: when the developing cartridge is mounted to or removed from the electrophotographic image forming apparatus (loader), the fixing projection may interfere with a separation/contact mechanism and/or other components in the electrophotographic image forming apparatus, making the loader and the unloader difficult.

Disclosure of Invention

The invention mainly aims to provide a developing box convenient to mount and dismount.

In order to achieve the above-described primary object, the present invention provides a developing cartridge including a cartridge body and a developing roller; wherein, the developing cartridge further comprises:

a handle member movable between a first position and a second position;

the movable component is arranged on the box body and can move between a third position and a fourth position; in the length direction of the developing roller, the free end portion of the movable member protrudes out of the cartridge body at a fourth position and is further away from the handle member than at a third position;

wherein movement of the handle member is associated with movement of the movable member.

According to an embodiment of the present invention, the handle member is provided to rotate between the first position and the second position, and a rotation axis of the handle member is provided parallel to the developing roller.

According to another embodiment of the present invention, the handle member is configured to translate between a first position and a second position, the direction of translation of the handle member being perpendicular to the length direction of the developer roller.

According to an embodiment of the present invention, the handle member protrudes more from the cartridge body at the first position than at the second position on a side of the cartridge body away from the developing roller.

According to an embodiment of the present invention, the movable member is provided to move in a lengthwise direction of the developing roller by being urged by the handle member.

According to an embodiment of the invention, the movable member moves from the third position to the fourth position when the handle member moves from the first position to the second position.

In a third position, according to an embodiment of the invention, the free end of the mobile element is retracted inside the case.

According to one embodiment of the invention, the free end of the mobile element has a tapered or beveled surface.

According to an embodiment of the present invention, one of the handle member and the movable member is provided with a first sliding groove, and the other of the handle member and the movable member is provided with a first sliding projection, the first sliding groove being provided obliquely with respect to the developing roller, the first sliding projection being provided in the first sliding groove.

Preferably, the first slide groove is provided on the handle member, and the first slide projection is provided on the movable member.

According to another embodiment of the present invention, a rocker member is provided between the handle member and the movable member, the rocker member being disposed obliquely with respect to the developing roller, and both ends of the rocker member being rotatably connected to the handle member and the movable member, respectively.

Preferably, the two ends of the rocker member are respectively provided with a second sliding groove and a third sliding groove, the handle member is provided with a second sliding protrusion rotatably connected with the second sliding groove, and the movable member is provided with a third sliding protrusion rotatably connected with the third sliding groove.

According to an embodiment of the present invention, the developing cartridge further comprises a holding mechanism for holding the handle member and the movable member in the respective positions.

Further, a retaining mechanism is provided between the movable member and the case.

Further, the holding mechanism includes an elastic limit portion provided on the movable member, a first recessed portion and a second recessed portion provided on the box body, the elastic limit portion being provided in the first recessed portion or the second recessed portion, thereby holding the handle member and the movable member at the respective positions.

According to one embodiment of the invention, the mobile element is rotatably connected to the case and can rotate between a third position and a fourth position; the movable member is connected with the handle member through a linkage mechanism, and when the handle member moves from the first position to the second position, the movable member is driven to rotate from the third position to the fourth position through the linkage mechanism.

Further, the above-mentioned link mechanism includes:

the translation component is connected with the handle component and can move along the length direction of the developing roller under the driving of the handle component;

and the two ends of the connecting component are respectively and rotatably connected with the translation component and the movable component.

When the handle component moves from the first position to the second position, the translation component moves towards the inner side of the box body along the length direction of the developing roller, and the movable component is driven to rotate from the third position to the fourth position through the connecting component.

Further, the handle component is provided with a fourth sliding chute which is obliquely arranged relative to the developing roller, and the translation component is provided with a fourth sliding bulge which is arranged in the fourth sliding chute.

Further, a retaining mechanism is provided between the translating member and the cassette for retaining the handle member and the movable member in respective positions.

According to one embodiment of the present invention, the handle member is provided on a side of the cartridge body away from the developing roller; the handle member is located at the middle of the cartridge body in the length direction of the developing roller, and the movable members are symmetrically disposed at opposite sides of the handle member.

In the present invention, the movement of the handle member is linked to the movement of the movable member, and the user can adjust the position of the movable member by operating the handle member during the dismounting and mounting processes, thereby avoiding or eliminating interference of the movable member with the separation/contact mechanism and/or other components in the electrophotographic image forming apparatus. The position of the movable component is adjusted through the handle component, and the handle component has the advantage of convenient operation.

To more clearly illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and detailed description.

Drawings

Fig. 1 is a first perspective view of a developing cartridge of embodiment 1 of the invention;

fig. 2 is a second perspective view of embodiment 1 of the developing cartridge of the present invention;

fig. 3 is a first exploded view of embodiment 1 of the developing cartridge of the present invention;

fig. 4 is a second exploded view of the developing cartridge of embodiment 1 of the present invention;

fig. 5 is a first transverse sectional view of embodiment 1 of the developing cartridge of the present invention, in which a grip member is in a first position;

fig. 6 is a second transverse sectional view of embodiment 1 of the developing cartridge of the present invention, in which the grip member is at a second position;

fig. 7 shows a state of the developing cartridge embodiment 1 of the present invention with the grip member at the second position;

fig. 8 is an exploded view of the developing cartridge of embodiment 2 of the present invention;

fig. 9 is a perspective view of embodiment 3 of the developing cartridge of the invention;

fig. 10 is an exploded view of the developing cartridge of embodiment 3 of the invention;

fig. 11 is a first transverse sectional view of the developing cartridge embodiment 3 of the present invention, with the grip member at a first position;

fig. 12 is a second transverse sectional view of the developing cartridge embodiment 3 of the present invention, with the grip member at a second position;

fig. 13 shows a state of embodiment 3 of the developing cartridge of the present invention when the grip member is at the second position;

fig. 14 is a perspective view of embodiment 4 of the developing cartridge of the invention;

fig. 15 is an exploded view of the developing cartridge of embodiment 4 of the invention;

fig. 16 shows a state in which embodiment 4 of the developing cartridge of the present invention is in the second position of the handle member.

Detailed Description

Example 1

As shown in fig. 1 and 2, the developing cartridge of embodiment 1 includes a cartridge body 11 and a developing roller 12 rotatably supported on the cartridge body 11. The side of the cartridge body 11 away from the developing roller 12 is provided with a handle member 13, and the handle member 13 is located at a substantially middle position of the cartridge body 11 in the longitudinal direction of the developing roller 12.

The handle member 13 may be rotatably coupled to the case 11. As shown in fig. 3, one side of the box body 11 away from the developing roller 12 is provided with a concave part 111, and two opposite sides of the concave part 111 in the length direction of the developing roller 12 are respectively provided with a pivot hole 112; the handle member 13 has a handle rotation shaft 131, and the handle rotation shaft 131 is rotatably disposed in the pivot hole 112 such that the handle member 13 can rotate about the handle rotation shaft 131. The handle rotation shaft 131 may be disposed parallel to the developing roller 12, and the rotation axis of the handle member 13 is correspondingly also parallel to the developing roller 12.

A rotation guide mechanism may be provided between the handle member 13 and the case 11 so that the rotation process of the handle member 13 is more stable. For example, as shown in fig. 3, the handle member 13 is provided with one guide protrusion 132 on each of opposite sides thereof, the recess 111 is provided with one arc-shaped guide groove 113 on each of opposite sides thereof, and the guide protrusions 132 are disposed in the arc-shaped guide grooves 113. When the handle member 13 is rotated, the guide projection 132 slides in the arc-shaped guide groove 113.

As shown in fig. 3 and 4, the cartridge body 11 is further provided with two movable members 14, and the two movable members 14 are disposed substantially symmetrically on opposite sides of the handle member 13 in the longitudinal direction of the developing roller 12. The movable member 14 includes a connecting portion 141 and a rod portion 142 integrally formed or fixedly connected, and the case 11 has a through-type guide hole 114, and the rod portion 142 is inserted into the guide hole 114. The end of the rod portion 142 remote from the handle member 13 is formed as a free end portion 140 of the movable member 14, the free end portion 140 having a tapered surface or ramp 1401, the tapered surface or ramp 1401 facilitating entry of the free end portion 140 into a separation/contact mechanism within the electrophotographic image forming apparatus.

The movable member 14 is movable in the longitudinal direction of the developing roller 12, and the movement of the movable member 14 is associated with the rotation of the handle member 13. For example, one first chute 133 is provided on each of opposite sides of the handle member 13 in the longitudinal direction of the developing roller 12, and the first chute 133 is provided obliquely with respect to the longitudinal direction of the developing roller 12. The connecting portion 141 is provided with a first sliding protrusion 143, and the first sliding protrusion 143 is disposed in the first sliding groove 133. The movement of the handle member 13 is linked to the movement of the movable member 14 by the engagement between the first slide groove 133 and the first slide projection 143. It is easily understood that the first slide groove 133 may be provided on the connecting portion 141 and the first slide protrusion 143 may be provided on the handle member 13.

The handle member 13 is rotatable between a first position as shown in fig. 2 or 5 and a second position as shown in fig. 6 or 7. As can be seen from a comparison of fig. 5 and 6, on the side of the cartridge body 11 remote from the developing roller 12, the handle member 13 protrudes more from the cartridge body 11 in the first position than in the second position. That is, if the distance between the distal end of the first lower handle member 13 and the axial center of the developing roller 12 is defined as H11 (see fig. 5), and the distance between the distal end of the second lower handle member 13 and the axial center of the developing roller 12 is defined as H12 (see fig. 6), then H11 is greater than H12.

When the handle member 13 is rotated between the first position and the second position, the movable member 14 is relatively moved between the third position and the fourth position. As shown in fig. 2, when the handle member 13 is in the first position, the movable member 14 is in the third position, in which the free end 140 of the movable member 14 is retracted into the case 11 (i.e., does not extend from the longitudinal end of the case 11). As shown in fig. 7, when the handle member 13 is rotated from the first position to the second position, the movable member 14 is translated from the third position to the fourth position in the length direction of the developing roller 12, and the free end portion 140 of the movable member 14 protrudes from the cartridge body 11 from the inside of the guide hole 114.

Of course, in the third position, the free end 140 of the movable member 14 may also protrude from the case 11, as long as the protruding displacement thereof in the third position is smaller than that in the fourth position; that is, the free end 140 of the movable member 14 is farther away from the handle member 13 in the fourth position than in the third position.

As shown in fig. 7, the downstream end (upper end in fig. 7) of the first chute 133 is closer to the free end portion of the movable member 14 than the upstream end (lower end in fig. 7) in a direction away from the developing roller 12 (i.e., upward direction in fig. 7). Thus, when the handle member 13 is rotated from the first position to the second position, the movable member 14 is moved toward the longitudinal end of the case 11, and is moved from the third position to the fourth position, and further protrudes from the longitudinal end of the case 11. Accordingly, when the handle member 13 is rotated from the second position to the first position, the movable member 14 is moved toward the inside of the case 11, thereby retracting the inside of the case 11.

Referring again to fig. 5, the developing cartridge may be mounted to the electrophotographic image forming apparatus in the L direction with the handle member 13 in the first position and the movable member 14 in the third position before mounting, which may be achieved by gravity of the developing cartridge while holding the handle member 13. During installation, a corresponding force application portion (e.g., a cross member located above the developer cartridge) within the electrophotographic image forming apparatus will apply a force to the handle member 13, causing the handle member 13 to rotate in the R direction from the first position to the second position, and the movable member 14 to correspondingly translate from the third position to the fourth position. At this time, the free end 140 of the movable member 14 protrudes from the longitudinal end of the cartridge body 11, and a separation/contact mechanism in the electrophotographic image forming apparatus can act on the free end 140, so that the developing roller 12 is separated from or brought into contact with the photosensitive drum.

When removing the developing cartridge from the electrophotographic image forming apparatus, the user can change the position of the movable member 14 by manipulating the handle member 13 to avoid or eliminate interference of the free end portion 140 with the separation/contact mechanism or other components within the electrophotographic image forming apparatus.

Example 2

Fig. 8 is an exploded view of the structure of embodiment 2 of the developing cartridge. As shown in fig. 8, the handle member 13 has a handle rotation shaft 131 and a guide projection 132, the box body 112 is provided with a pivot hole 112 and a guide arc surface 115, the handle rotation shaft 131 is rotatably provided in the pivot hole 112, and the guide projection 132 is carried on the guide arc surface 115. The guide protrusions 132 slide on the guide arcs 115 when the handle member 13 rotates about the handle rotation shaft 131 between the first position and the second position.

In embodiment 2, the developing cartridge further comprises a holding mechanism for holding the handle member 13 and the movable member 14 in their respective positions. The holding mechanism may be disposed between the movable member 14 and the case 11, or between the handle member 13 and the case 11. Fig. 8 shows a holding mechanism provided between the movable member 14 and the case body 11, the holding mechanism including an elastic catch 144 provided on the movable member 14, a first recess 116 and a second recess 117 provided on the case body 11, the elastic catch 144 having a locking projection 1441 as an example of an elastic stopper, the locking projection 1441 being provided in the first recess 116 or the second recess 117, thereby holding the handle member 13 and the movable member 14 in the respective positions. The elastic catch 144 may be provided on the connection part 141 to constitute a part of the connection part 141.

Specifically, the first recessed portion 116 is located inside the second recessed portion 117 in the longitudinal direction of the developing roller 12. When the locking projection 1441 is disposed in the first recess 116, the handle member 13 is held at the first position, and the movable member 14 is held at the third position; when the locking projection 1441 is disposed in the second recess 117, the handle member 13 is held at the second position, and the movable member 14 is held at the fourth position.

Before the mounting machine, the handle member 13 is located at the first position, the movable member 14 is located at the third position, the handle member 13 is rotated from the first position to the second position by applying a force to the handle member 13 by a corresponding force applying portion in the electrophotographic image forming apparatus during the mounting process, the locking protrusion 1441 of the elastic catch 144 is forced to be disengaged from the first recess 116, and the movable member 14 is accordingly capable of being translated from the third position to the fourth position. When the handle receiver 13 is rotated to the second position, the movable member 14 moves to the fourth position, and the locking protrusion 1441 of the elastic catch 144 just enters the second recess 117, so that the handle member 13 is held at the second position and the movable member 14 is held at the fourth position.

For the description of other aspects of embodiment 2 of the developing cartridge, reference is made to embodiment 1, and details are not repeated.

Example 3

Fig. 9 and 10 show the structure of embodiment 3 of the developing cartridge. As shown in fig. 9 and 10, in embodiment 3, the cartridge body 31 has a recessed portion 311 on the side opposite to the developing roller, and the recessed portion 311 is located at a substantially middle position of the cartridge body 31 in the longitudinal direction of the developing roller. The handle member 33 is disposed facing the recess 311 and is translatable between a first position and a second position, a portion of the handle member 33 entering the recess 311 upon movement to the second position. The translational direction of the handle member 33 may be perpendicular to the length direction of the developing roller.

The cartridge body 31 is provided with two movable members 34, and the two movable members 34 are disposed substantially symmetrically on opposite sides of the handle member 33 in the length direction of the developing roller. The movable member 34 is rod-shaped, the case 31 is provided with a guide groove 312, and the movable member 34 is slidably disposed in the guide groove 312. In association with the movement of the handle member 33, the movable member 34 can be translated from the third position to the fourth position in the length direction of the developing roller.

A rocker member 35 is provided between the movable member 34 and the handle member 33, the rocker member 35 being rotatably provided on the case 31 for correlating the movement of the handle member 33 with the movement of the movable member 34. As shown in fig. 10, the box body 31 is provided with a pivot hole 313, and a substantially middle portion of the rocker member 35 has a rotation shaft 351, and the rotation shaft 351 is rotatably provided in the pivot hole 313 so that the rocker member 35 can rotate about the rotation shaft 351.

The rocker member 35 is pivotally connected at both ends to the movable member 34 and the handle member 33, respectively. For example, the two ends of the rocker member 35 are respectively provided with a second sliding slot 353 and a third sliding slot 352, the handle member 33 is provided with a second sliding protrusion 331 rotatably connected with the second sliding slot 353, and the movable member 34 is provided with a third sliding protrusion 342 rotatably connected with the third sliding slot 352. The end of the second sliding projection 331 may be formed with a slip-off prevention head 332 to prevent the rocker member 35 and the handle member 33 from being disengaged. The end of the third sliding protrusion 342 may be formed with a coming-off prevention head 3421 to prevent the movable member 34 and the rocker member 35 from coming off.

The handle member 33 is translatable between a first position as shown in fig. 11 and a second position as shown in fig. 12, the direction of translation of the handle member 33 being perpendicular to the lengthwise direction of the developing roller. As can be seen from a comparison of fig. 11 and 12, on the side of the cartridge body 31 remote from the developing roller 12, the distal end of the handle member 33 protrudes more from the cartridge body 31 in the first position than in the second position. In other words, if the distance between the distal end of the first lower handle member 33 and the axial center of the developing roller 12 is defined as H31 (see fig. 11), and the distance between the distal end of the second lower handle member 33 and the axial center of the developing roller 12 is defined as H32 (see fig. 12), then H31 is greater than H32.

The movable member 34 is correspondingly moved between the third position and the fourth position when the handle member 33 is translated between the first position and the second position. As shown in FIG. 9, when the handle member 33 is in the first position, the movable member 34 is in the third position, in which the free end 340 of the movable member 34 is retracted within the case 31 (i.e., does not extend from the longitudinal end of the case 31). As shown in fig. 13, when the handle member 33 is translated from the first position to the second position, the movable member 34 is translated from the third position to the fourth position in the longitudinal direction of the developing roller 12, with the free end portion 340 of the movable member 34 protruding out of the cartridge body 31. The free end 340 of the movable member 34 is also formed with a taper or bevel 3401.

In addition, in the third position, the free end portion 340 of the movable member 34 may also protrude from the box body 31 as long as the protruding displacement thereof in the third position is smaller than that in the fourth position. That is, the free end 340 of the movable member 34 is further away from the handle member 33 in the fourth position than in the third position.

As shown in fig. 13, the downstream end (upper end in fig. 13) of the rocker member 35 is farther from the free end 340 of the movable member 34 than the upstream end (lower end in fig. 13) in a direction away from the developing roller (i.e., upward direction in fig. 13). Thus, when the handle member 33 is moved from the first position to the second position, the movable member 34 is moved toward the longitudinal end of the case 31, and is moved from the third position to the fourth position, and further protrudes from the longitudinal end of the case 31. Accordingly, when the handle member 33 is moved from the second position to the first position, the movable member 34 is moved toward the inside of the box body 31, thereby retracting the inside of the box body 31.

Referring again to fig. 11, the developer cartridge may be mounted to the electrophotographic image forming apparatus in the L direction with the handle member 33 in the first position and the movable member 34 in the third position before mounting, and a corresponding force applying portion (e.g., a cross member located above the developer cartridge) within the electrophotographic image forming apparatus during mounting will apply a force to the handle member 33 to translate the handle member 33 in the M direction from the first position to the second position and the movable member 34 correspondingly from the third position to the fourth position. At this time, the free end portion 340 of the movable member 34 protrudes from the longitudinal end of the cartridge body 31, and the separation/contact mechanism in the electrophotographic image forming apparatus can act on the free end portion 340, so that the developing roller 12 is separated from or brought into contact with the photosensitive drum. The disassembling operation of the developing cartridge in embodiment 3 can refer to embodiment 1, and is not described again.

Example 4

Fig. 14 and 15 show the structure of embodiment 4 of the developing cartridge. As shown in fig. 14 and 15, in the developing cartridge of embodiment 4, a grip member 43 is provided on the side of the cartridge body 41 remote from the developing roller. The handle member 43 is located at a substantially middle position of the cartridge body 41 in the longitudinal direction of the developing roller.

The handle member 43 may be rotatably connected to the case 41. As shown in fig. 15, one side of the cartridge body 41 with respect to the developing roller has a recessed portion, opposite sides of which are provided with pivot holes 411, and the handle member 43 has a handle pivot shaft 431, and the handle pivot shaft 431 is rotatably provided in the pivot holes 411 such that the handle member 43 can rotate about the handle pivot shaft 431. The rotational axis of the handle member 43 is also parallel to the developing roller.

The case 41 is further provided with guide arcs 412 on opposite sides of the recess, respectively, and the handle member 43 is provided with sliding protrusions 432 carried on the guide arcs 412 on opposite sides thereof. When the handle member 43 is rotated, the sliding projection 432 slides on the guide arc 412.

Both longitudinal ends of the cartridge body 41 are provided with movable members 44, and the movable members 44 are disposed symmetrically with respect to the handle member 43 in the longitudinal direction of the developing roller. The middle portion of the movable member 44 (the portion between both ends of the movable member 44) is rotatably connected to the case 41. As shown in fig. 15, the movable member 44 has a pivot hole 441 in the middle, the case 413 has a rotation shaft 413 at a longitudinal end thereof, the rotation shaft 413 is disposed in the pivot hole 441, and the movable member 44 can rotate about the rotation shaft 413. The end of the movable member 44 remote from the handle member 43 is a free end 440, the free end 440 having a bevel 4401.

As shown in fig. 14 and 15, the movable member 44 and the handle member 43 are connected by a linkage 45 such that rotation of the movable member 44 is linked to rotation of the handle member 43. When the handle member 43 is rotated from the first position to the second position, the movable member 44 is rotated from the third position shown in fig. 14 to the fourth position shown in fig. 16. In embodiment 4, the first position and the second position of the handle member 43 can be referred to the first position and the second position of the handle member 13 in embodiment 1.

The linkage 45 includes a translating member 451 and a connecting member 452. The translation member 451 is slidably provided on the cartridge body 41 and can translate in the longitudinal direction of the developing roller. The translating member 451 is provided with a fourth sliding projection 4511, the handle member 43 is provided with a fourth sliding groove 433, the fourth sliding groove 433 is disposed obliquely with respect to the developing roller, and the fourth sliding projection 4511 is disposed in the fourth sliding groove 433.

Both ends of the connecting member 452 are rotatably connected with the adjacent ends of the translating member 451 and the movable member 44, respectively. When the handle member 43 rotates from the first position to the second position, the translating member 451 moves toward the inside of the cartridge body 41 in the length direction of the developing roller by the cooperation of the fourth sliding groove 433 and the fourth sliding protrusion 4511, and further, the movable member 44 is rotated from the third position to the fourth position by the link member 452.

In the third position, as shown in fig. 14, the free end 440 of the movable member 440 is retracted inside the case 41; in the fourth position, as shown in fig. 16, the free end portion 440 of the movable member 440 protrudes from the longitudinal end of the case 41. Likewise, in the third position, the free end 440 of the movable member 44 may also protrude from the case 41 as long as its protruding displacement in the third position is smaller than that in the fourth position. That is, the free end 440 of the movable member 44 is further away from the handle member 43 in the fourth position than in the third position.

As shown in fig. 16, the downstream end (upper end in fig. 16) of the fourth chute 433 is farther from the free end 440 of the movable member 44 than the upstream end (lower end in fig. 16) in the direction away from the developing roller (i.e., upward direction in fig. 16). Thus, when the handle member 43 rotates from the first position to the second position, the translating member 451 translates toward the inner side of the case 41, and the connecting member 452 rotates the movable member 44, so that the free end of the movable member 44 protrudes from the longitudinal end of the case 41. When the handle member 43 is rotated from the second position to the first position, the translating member 451 will translate toward the outside of the case 41 and bring the movable member 44 to rotate reversely through the connecting member 452, so that the free end of the movable member 44 is retracted back into the case 41.

Further, a holding mechanism for holding the handle member 43 and the movable member 44 in the respective positions is provided between the translation member 45 and the case 41. As shown in fig. 15, the holding mechanism includes a resilient catch 4512 provided on the translating member 45, a first recess 414 and a second recess 415 provided on the case 41, and a locking protrusion of the resilient catch 4512 is provided in the first recess 414 or the second recess 415, thereby holding the handle member 43 and the movable member 44 in the respective positions.

Specifically, the first recessed portion 414 is located inside the second recessed portion 415 in the longitudinal direction of the developing roller. When the catching projection of the elastic catch 4512 is disposed in the second recess 415, the handle member 43 is held at the first position and the movable member 44 is held at the third position; when the catching protrusion of the elastic catch 4512 is disposed in the first recess 414, the handle member 43 is held at the second position and the movable member 44 is held at the fourth position.

It is easily understood that the technical features of the embodiments of the present invention can be combined with each other unless there is a case of mutual conflict. For example, the handle member 13 of embodiment 1 may be arranged to translate between the first position and the second position as the handle member 33 of embodiment 3, which may also enable movement of the movable member 14 between the third position and the fourth position.

Although the present invention has been described with reference to specific embodiments, it is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that various changes and modifications can be made without departing from the scope of the invention, and it is intended to cover all modifications and equivalents of the invention as defined by the appended claims.