Processing box

Abstract

The utility model discloses a processing box, which comprises a frame, a photosensitive drum; the processing box further comprises a first coupling component which can receive external force and can drive the photosensitive drum to rotate. The first coupling component comprises a first part and a second part, the second part is connected to the photosensitive drum, the first part is movably connected to the second part, an elastic piece is arranged between the first part and the second part, the first part comprises a first surface and a second surface, and the second surface comprises a second surface and a third surface; the photosensitive drum extends towards the direction far away from the photosensitive drum in the left-right direction; a second surface located on a downstream side of the first surface in a rotation direction of the first coupling member; and a third surface, measured in the left-right direction, a distance from a right end of the photosensitive drum to the third surface decreases along an extension of the third surface in a rotation direction of the first coupling member.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic photographic imaging, in particular to a processing box. Background Art

[0002] In a conventional imaging device, a processing device (i.e., a developing box) that can act on a photosensitive drum and a photosensitive drum are integrated into a box, and the box can be detachably mounted to the imaging device. Depending on the type of box, the user can perform maintenance operations on the device without relying on service personnel, thereby significantly improving operability. Therefore, this type of box is widely used in imaging devices.

[0003] The prior art discloses a processing box, which is detachably installed in an imaging device, wherein the imaging device includes a driving unit, the driving unit includes a driving force applying member and a braking force applying member, the processing box includes a photosensitive drum and a coupling member arranged at one end of the length direction of the photosensitive drum, the coupling member has a driving force receiving part and a braking force receiving part, the driving force receiving part can be coupled with the driving force applying member to drive the photosensitive drum to rotate, and the braking force receiving part can be engaged with the braking force applying member to receive the braking force, which is used to resist the load of the rotation of the coupling member, that is, the coupling member can simultaneously receive the driving force and the braking force from the driving unit, which can increase the torque required for the rotation of the photosensitive drum, and thus the speed fluctuation of the photosensitive drum is suppressed, and the rotation of the photosensitive drum is more stable. However, the coupling member in the prior art is fixedly arranged at one end of the photosensitive drum. When the coupling member has a manufacturing error or an installation error so that the actual position of the coupling member is farther away from the driving unit of the imaging device than the normal position, the coupling amount between the coupling member and the driving unit will be insufficient and it is easy to be decoupled, or the two cannot be coupled, thereby affecting the printing of the processing box. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a new processing box, which is mainly achieved through the following technical solutions:

[0005] A processing box, comprising:

[0006] frame;

[0007] A photosensitive drum is rotatably supported on the frame and is rotatable about a photosensitive drum rotation axis extending in the left-right direction;

[0008] The process cartridge further comprises a first coupling member, the first coupling member can receive an external force and can drive the photosensitive drum to rotate; the first coupling member comprises a first portion and a second portion, the second portion is connected to the photosensitive drum, the first portion is movably connected to the second portion, an elastic member is arranged between the first portion and the second portion, the first portion has an extended position and a retracted position, in the left-right direction, compared with the first portion located at the retracted position, at least a portion of the first portion located at the extended position is further away from the photosensitive drum, when the first portion is not subjected to an external force, the first portion is maintained at the extended position, the first portion comprises:

[0009] A first surface extending in the left-right direction in a direction away from the photosensitive drum;

[0010] a second surface located on a downstream side of the first surface in the rotation direction of the first coupling member, the second surface extending in a direction away from the photosensitive drum;

[0011] A third surface, at least a portion of which is located between the first surface and the second surface in the rotation direction of the first coupling member, and a distance from the right end of the photosensitive drum to the third surface measured in the left-right direction decreases along the extension of the third surface in the rotation direction of the first coupling member.

[0012] Furthermore, the second surface is arranged obliquely relative to the left-right direction.

[0013] Furthermore, one of the first part and the second part is provided with a rib, and the other is provided with a slide groove, and the first part is installed by the cooperation of the rib and the slide groove so that the first part can move relative to the second part along a predetermined path.

[0014] Furthermore, an anti-detachment portion is provided on one of the first part and the second part, and a connecting portion is provided on the other part, and the first part can be prevented from being separated from the second part by the connection between the anti-detachment portion and the connecting portion.

[0015] Further, the locking portion and one of the locking portions are configured as an elastic buckle.

[0016] Further, in a radial direction perpendicular to the left-right direction, a maximum distance between a portion of the first surface and the rotation axis of the first coupling member is K, wherein 6.7 mm≦K≦6.95 mm.

[0017] Furthermore, the processing box also includes a developing roller and a second coupling member that can receive external force and drive the developing roller to rotate. In the left-right direction, the right end face of the first coupling member is farther away from the photosensitive drum than the right end face of the second coupling member.

[0018] Furthermore, taking the right end surface of the second coupling member as a reference surface for measurement, in the left-right direction, the right end surface of the first coupling member and the right end surface of the second coupling member have a distance L, wherein 0 mm<L≤2 mm.

[0019] Furthermore, 0.5mm≤L≤1.7mm.

[0020] Furthermore, the processing box also includes a developing roller and a second coupling member that can receive external force and drive the developing roller to rotate. In the left-right direction, the right end face of the first coupling member is flush with the right end face of the second coupling member or is closer to the photosensitive drum than the right end face of the second coupling member. The right end face of the second coupling member is used as a reference plane for measurement. In the left-right direction, the right end face of the first coupling member and the right end face of the second coupling member have a distance L, wherein 0mm≤L≤1mm.

[0021] In the processing box of the utility model, a part of the first coupling member is constructed to be elastically movable relative to the photosensitive drum. When coupled with the driving unit of the imaging device, the first coupling member is elastically in contact with the driving unit of the imaging device. This structure helps the first coupling member to maintain a close engagement with the driving unit of the imaging device, thereby avoiding the problem of the first coupling member being accidentally decoupled from the driving unit of the imaging device during the operation of the processing box. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the front of the processing box installed in the tray in the first embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the process box installed in the tray in the first embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the process box and the tray in Embodiment 1 of the present utility model when they are installed in the imaging device;

[0025] Figure 4 This is a schematic diagram of the first driving unit in Embodiment 1 of the present utility model;

[0026] Figure 5 This is a schematic diagram of the separation of the driving force applying component and the braking force applying component in Embodiment 1 of the present utility model;

[0027] Figure 6It is a schematic diagram of a processing box in Embodiment 1 of the present utility model at a certain angle;

[0028] Figure 7 This is a schematic diagram of the processing box in Embodiment 1 of the utility model from another angle;

[0029] Figure 8 This is a schematic diagram of a first coupling member at a certain angle in Embodiment 1 of the present utility model;

[0030] Fig. 9 This is a schematic diagram of the first coupling member in Embodiment 1 of the utility model from another angle;

[0031] Fig.10 It is a schematic diagram of the force-bearing claw abutting against the plane of the first coupling member in Embodiment 1 of the utility model;

[0032] Fig.11 It is a schematic diagram of the case where the force-bearing protrusion of the force-bearing claw in Embodiment 1 of the present utility model abuts against the second surface of the first coupling member;

[0033] Fig.12 This is a schematic diagram of a processing box in Embodiment 2 of the present utility model;

[0034] Fig.13 This is a schematic diagram of the first coupling member in Embodiment 2 of the present utility model;

[0035] Fig.14 This is a schematic diagram of the first structure of the first coupling member in Embodiment 3 of the present utility model;

[0036] Fig.15 This is a schematic diagram of the second structure of the first coupling member in Embodiment 3 of the present utility model;

[0037] Fig.16 This is a third structural schematic diagram of the first coupling member in Embodiment 3 of the present utility model;

[0038] Fig.17 This is a schematic diagram of the first coupling member in Embodiment 4 of the present utility model;

[0039] Fig.18 This is a schematic diagram of a processing box in Embodiment 5 of the present utility model at a certain angle;

[0040] Fig.19 It is a schematic diagram of another angle of the processing box in Embodiment 5 of the utility model;

[0041] Fig. 20 This is a schematic diagram of a first coupling member at a certain angle in Embodiment 5 of the present utility model;

[0042] Fig.21 This is a schematic diagram of a first coupling member exploded at a certain angle in Embodiment 5 of the present utility model;

[0043] Fig. 22 This is a schematic diagram of the first coupling member in Embodiment 5 of the present utility model from another angle;

[0044] Fig.23 This is a schematic diagram of another angle of decomposition of the first coupling member in Embodiment 5 of the utility model;

[0045] Fig.24 This is another angle diagram of the first coupling component in Example 5 of the utility model. DETAILED DESCRIPTION

[0046] Example 1

[0047] In order to better describe and understand the processing box 100 in the present invention, various directions of the processing box 100 will be defined, wherein the processing box 100 can be installed in the imaging device 1 along the direction from back to front; the length direction of the processing box 100 is the left-right direction (i.e., the direction in which the rotation axis of the first coupling member extends), and the first coupling member 110 is arranged at the right end of the processing box 100 in the left-right direction; the up-down direction, the front-back direction, and the left-right direction are all perpendicular.

[0048] like Figure 1-11 As shown, an imaging device 1 in the prior art and a processing box 100 in embodiment 1 of the utility model which is detachably installed in the imaging device 1 are shown. Next, the imaging device 1 and the processing box 100 will be described in detail respectively in conjunction with specific drawings.

[0049] [Imaging equipment]

[0050] like Figure 1-5 As shown, an imaging device 1 in the prior art is shown, which is generally in the shape of a rectangular parallelepiped, and includes a hollow accommodating chamber 2, a door cover 4 that can cover the accommodating chamber 2, and the door cover 4 can rotate between an open state that can expose the accommodating chamber 2 and a closed state that covers the accommodating chamber 2, and a tray 3 that can slide along the front-to-back direction and can be installed in the accommodating chamber 2 from back to front when the door cover 4 is in the open state, and the tray 3 has four box accommodating parts arranged in the front-to-back direction, and the four box accommodating parts can respectively accommodate processing boxes 100 with developer colors of yellow, magenta, blue and black, and the tray 3 can support the processing box 100 and install it in the accommodating chamber 2 of the imaging device 1 along the back-to-front direction.

[0051] The imaging device 1 further comprises a first driving unit 8 and a second driving unit 9 arranged on the right end wall of the accommodating chamber 2, both of which can provide driving force for the processing box 100 and can jointly drive the processing box 100 to work, the first driving unit 8 and the second driving unit 9 are both connected to the door cover 4 through a connecting rod member, when the processing box 100 is installed on the tray 3 and the two are jointly installed in the imaging device 1, when the door cover 4 is opened, the first driving unit 8 and the second driving unit 9 are retracted to the right side wall of the imaging device 1 and keep a distance from the coupling member of the processing box 100, but when the door cover 4 is closed, the first driving unit 8 and the second driving unit 9 can extend outward in response to the movement of the door cover 4 under the action of the connecting rod member to couple with the coupling member of the processing box 100, that is, the first driving unit 8 and the second driving unit 9 can be retracted and extended according to the opening / closing operation of the door cover 4, therefore, in the process of the tray 4 supporting the processing box 100 to be installed to the imaging device 1 along the predetermined installation direction, there will be no installation interference with the first driving unit 8 and the second driving unit 9, and this situation will be avoided.

[0052] The first driving unit 8 includes a driving force applying member 10 and a braking force applying member 20 disposed inside the driving force applying member 10, and the two rotate coaxially; when viewed from the left side to the right side of the imaging device 1, the driving force applying member 10 can be driven by the motor in the imaging device 1 to rotate in the counterclockwise direction, and an elastic member is connected to the right end of the driving force applying member 10. When the driving force applying member 10 is pushed by an external force from left to right, the driving force applying member 10 will resist the elastic force generated by the elastic member and retract to the right, that is, the driving force applying member 10 can be relatively retracted after being subjected to force. The side wall of the imaging device 1 moves in the left-right direction; the driving force applying member 10 has a basic structure with a hollow cylindrical appearance, and a pair of driving protrusions 14 are arranged in the inner cavity of the driving force applying member 10 and protrude toward the direction of the rotation axis (i.e., the radial direction) close to the driving force applying member 10. The two are arranged at intervals in the rotation direction of the driving force applying member 10. The driving protrusion 14 includes a driving surface 14a facing the downstream side of the rotation direction of the driving force applying member 10, and the driving surface 14a can be used as a driving force transmission surface to drive the processing box 100.

[0053] The braking force applying member 20 is constructed to output a braking force (damping) after receiving an external rotational force. The braking force applying member 20 includes a force-receiving claw 21 that can receive an external rotational force. The force-receiving claw 21 has a force-receiving protrusion 21a that protrudes from the free end of the force-receiving claw 21 toward the upstream side of the rotation direction of the braking force member 20; the braking force receiving member 20 also includes an operably connected connecting shaft 40 connected to the force-receiving claw 21, a connecting member 43 connected to the connecting shaft 40, and a damper 44 connected to the connecting member 43. The damper 44 can rotate in response to the rotation of the force-receiving claw 21, and the damper 44 driven to rotate can generate a braking force, which is fed back to the force-receiving claw 21 through the connecting member 43 and the connecting shaft 40. Moreover, the braking force applying member 20 further comprises a first elastic member 41 abutting between the connecting shaft 40 and the connecting member 43 and a second elastic member 42 abutting between the force claw 21 and the connecting member 43, wherein the diameter of the first elastic member 41 is smaller than the diameter of the second elastic member 42, the first elastic member 41 can apply its compressed and accumulated elastic force to the connecting shaft 40 to maintain the meshing state of the two, and the second elastic member 42 can apply its compressed and accumulated elastic force to the force claw 21 to keep the force claw 21 in the extended position, that is, after the force claw 21 is subjected to force, the force claw 21 can move in the left and right directions relative to the driving force applying member 10.

[0054] [Processing cartridge]

[0055] like Figure 6-11 As shown, a processing box 100 in embodiment 1 of the utility model is shown, and the processing box 100 can be detachably installed in the above-mentioned imaging device 1; the processing box 100 includes a frame 101 that can accommodate a developer, and a developing roller (not shown) and a photosensitive drum 103 supported on the frame 101, and a first coupling member 110 and a second coupling member 109 are also provided on the right side of the frame 101, and the first coupling member 110 and the second coupling member 109 can both be used to receive a rotational driving force in the imaging device 1 to drive the processing box 100, wherein the first coupling member 110 is installed at the right end of the photosensitive drum 103, which can be coupled with the first drive unit 8 and can receive the rotational driving force output by it to rotate the photosensitive drum 103, and the second coupling member 109 can be coupled with the second drive unit 9 and can receive the rotational driving force output by it to rotate the developing roller, and when viewed from the right end to the left end of the processing box 100, the first coupling member 110 and the second coupling member 109 can rotate in a clockwise direction.

[0056] The first coupling member 110 includes a surface 111 arranged to intersect with the rotation axis direction of the first coupling member 110, and a first protrusion 114 extending rightward (i.e., in a direction away from the photosensitive drum 103 in the left-right direction) from the surface 111. The first protrusion 114 has a pair of first protrusions 114, which are arranged at intervals in the rotation direction of the first coupling member 110. The first protrusion 114 has a first end and a second end in the left-right direction, and the first end is farther away from the photosensitive drum 103 than the second end. Specifically, the first protrusion 114 includes a first surface 114a extending in the left-right direction, and the first surface 114a faces the first coupling member 111. 0 is arranged in a manner to be on the upstream side of the rotation direction of the first coupling member 110, the first surface 114a is configured to receive the rotational driving force of the driving surface 14a of the driving force applying member 10, preferably, the first surface 114a extends in a direction perpendicular to the surface 111 to increase the contact area with the driving surface 14a of the driving force receiving member 10 which also extends in parallel to the left and right direction, thereby improving the stability of the driving force transmission; the first protrusion 114 is not provided with an outwardly protruding protrusion on the first surface 114a facing the upstream side of the rotation direction of the first coupling member 110, so as to provide sufficient space on the upstream side of the first surface 114a to accommodate the driving protrusion of the driving force applying member 10, thereby avoiding interference between the two.

[0057] The first protrusion 114 also includes a second surface 114b, which can receive a braking force opposite to the driving force. Specifically, it can receive the braking force output by the force-receiving claw 21 of the braking force receiving member 20 to transmit the braking force to the photosensitive drum 103. Therefore, this can increase the torque required for the rotation of the photosensitive drum 103, suppress the speed fluctuation of the photosensitive drum, and the rotation of the photosensitive drum will be smoother; in the rotation direction of the first coupling member 110, the second surface 114b is arranged on the downstream side of the first surface 114a on the first protrusion 114, and faces the downstream side of the rotation direction of the first coupling member 110, that is, the second surface 114b and the first surface 111a are surfaces opposite to each other on the first protrusion 114 in the rotation direction of the first coupling member 110, and the second surface 114b extends in the left-right direction. The second surface 114b extends from the surface 111 in a direction away from the photosensitive drum 103, and the second surface 114b is inclined with respect to the left-right direction, that is, the second surface 114b is arranged crosswise with the left-right direction. More specifically, a portion of the second surface 114b is arranged facing the left end of the processing box 100 in the left-right direction, that is, facing the direction of the photosensitive drum 103, so as to inhibit the force claw 21 of the braking force receiving member 20 from moving in a direction away from the photosensitive drum 103; in other words, in the rotation direction of the first coupling member 110, the distance between the second surface 114b and the first surface 114a decreases along the extension of the second surface 114b in the direction from right to left; therefore, by constructing the second surface 114b as the above-mentioned structure, the engagement stability of the two during the engagement process can be significantly improved.

[0058] The first protrusion 114 also includes a third surface 114c located at a first end of the first protrusion 114, which is arranged to extend around the rotation axis of the first coupling member 110 and face the right end of the photosensitive drum 103. In the rotation direction of the first coupling member 110, the third surface 114c extends from the upstream side position of the first surface 114a to a position adjacent to the second surface 114b. The third surface 114c is spaced apart from the surface 111 in the extension direction of the rotation axis of the first coupling member 110 and is arranged on the right side of the surface 111. During the coupling of the first coupling member 110 with the first driving unit 8 of the imaging device 1, the force claw 21 of the braking force applying member 20 and the second surface 114b have two different position states, one of which is that when the processing box 100 is installed in the imaging device 1 but the door cover 4 is not closed, the force protrusion 21a of the force claw 21 is in the extension direction of the rotation axis of the first coupling member 110. 4. The first coupling member 110 is located at a position downstream of the second surface 114b and adjacent to the second surface 114b in the extending direction and is spaced from the second surface 114b in the rotating direction of the first coupling member 110. As the first driving unit 8 extends in response to the closing of the door cover 4, the force-bearing protrusion 21a of the force-bearing claw 21 can move directly from right to left to a position facing the second surface 114b, that is, the force-bearing protrusion 21a and the second surface 114b at this time have an overlapping portion in the direction in which the rotation axis of the first coupling member 110 extends, and the two are engaged. Almost at the same time, the driving surface 14a of the driving force applying member 10 is also engaged with the first surface 114a. Therefore, the first coupling member 110 is engaged with the first driving unit 8. Another position state of the two is that there is an angle difference between the force-bearing protrusion 21a and the second surface 114b in the rotating direction of the first coupling member 110, so that the two cannot be directly engaged, such as Fig.10 As shown, as the first driving unit 8 extends out in response to the closing of the door cover 4, the force-bearing protrusion 21a abuts against the third surface 114c and overcomes the elastic force of the second elastic member 42 and retracts to the right relative to the driving force applying member 10. At this time, the force-bearing protrusion 21a and the third surface 114c are in an elastic contact state. As the force-bearing claw 21 is driven to rotate, the force-bearing protrusion 21a can slide on the third surface 114c along the clockwise direction when viewed from right to left until it is out of contact with the third surface 114c and moves in the direction close to the photosensitive drum 103 under the elastic force of the second elastic member 42. When the force-bearing protrusion 21a and the second surface 114b have an overlapping portion in the direction in which the rotation axis of the first coupling member 10 extends, the two can complete the following operation. Fig.11As shown in the engagement, almost simultaneously, the driving surface 14a of the driving force applying member 10 and the first surface 114a are also engaged, so that the first coupling member 10 and the first driving unit 8 are engaged. While driving the photosensitive drum 103 to rotate, the braking force receiving member 20 can also suppress the rotation of the photosensitive drum 103 to avoid large fluctuations in its speed and affect the printing quality of the processing box 100.

[0059] Furthermore, the third surface 114c will not face the downstream side of the rotation direction of the first coupling member 110, that is, the third surface 114c has two different structures, one of which is that the third surface 114c is a surface facing the upstream side of the rotation direction of the first coupling member 110, and the other is that the third surface 114c is constructed as a surface perpendicular to the extension direction (left-right direction) of the rotation axis of the first coupling member 110; preferably, the third surface 114c is perpendicular to the left-right direction, that is, the third surface 114c is not set as an inclined surface, which further simplifies the structure of the first coupling member 110 and reduces the production cost. Furthermore, in the left-right direction, the third surface 114c will not be farther away from the photosensitive drum 103 than the first end of the first surface 114a. In other words, the closest distance between the third surface 114c and the photosensitive drum 103 in the left-right direction is P1, and the distance between the first end of the first surface 114a and the photosensitive drum 103 is P2, wherein P1≤P2, so as to avoid the problem that when the third surface 114c is set at a position farther away from the photosensitive drum 103 relative to the first end of the first surface 114a, the force-bearing claw 21 is retracted too much relative to the driving force applying member 10 and is stuck with the driving force applying member 10; that is, the third surface 114c also has two structures, one of which is that the third surface 114c is perpendicular to the left-right direction and is flush with the first end of the first surface 114a in the left-right direction, and the two have the same distance from the photosensitive drum 103 The same distance, that is, P1=P2; another structure is that the third surface 114c is perpendicular to the left and right directions and is closer to the photosensitive drum 103 than the first end of the first surface 114a, that is, P1<P2; further, the height difference P between P1 and P2 is preferably, 0mm<P≦2mm, and more preferably, 0.6mm≦P≦1.5mm, so as to avoid that when P is set too large, the third surface 114c is set too close to the photosensitive drum 103 when the length of the first surface 114a in the left and right directions remains unchanged, and the length of the second surface 114b in the direction in which the rotation axis of the first coupling member 110 extends is insufficient, resulting in insufficient engagement with the force protrusion 21a of the force claw 21, and it is difficult to ensure the engagement stability of the two. Therefore, setting P within the above range has better engagement stability between the force claw 21 and the second surface 114b.

[0060] Furthermore, a fourth surface 114d is provided on the first protrusion 114. The fourth surface 114d is placed on the upstream side of the first coupling member 110 in the rotation direction relative to the third surface 114c, and is arranged adjacent to the third surface 114c. The fourth surface 114d is an inclined portion having a substantially same inclination direction as the second surface 114b. More specifically, the second surface 114b is an inclined portion that gradually moves away from the photosensitive drum 103 as the second surface 114b moves downward in the rotation direction, and the fourth surface 114d is also an inclined portion that gradually moves away from the photosensitive drum 103 as the fourth surface 114d moves downward in the rotation direction. The fourth surface 114d can be used to direct the force-bearing claw 21 toward A guiding portion guiding the third surface 114c; when the force-bearing protrusion 21a of the force-bearing claw 21 enters a position located on the upstream side of the third surface 114c in the rotation direction, the force-bearing claw 21 may abut against the fourth surface 114d. As the force-bearing claw 21 rotates, the force-bearing claw 21 moves along the fourth surface 114d in a direction gradually away from the photosensitive drum 103 under the action of the elastic force of the second elastic member 42. Finally, the force-bearing claw 21 may be guided by the fourth surface 114d to the third surface 114c. The subsequent engagement process has been described above and will not be repeated here. Therefore, by providing the fourth surface 114d as a guiding portion, the force-bearing claw 21 may be guided to the third surface 114c, thereby improving the smoothness and success rate of engagement. Of course, optionally, the protruding portion of the first protrusion 114 located on the upstream side of the first surface 114a can be cancelled, that is, the fourth surface 114d can be cancelled, which can also realize the function of the first surface 114a engaging with the driving surface 14a, and the second surface 114b engaging with the force-bearing protrusion 114a.

[0061] Example 2

[0062] like Figure 12-13, a processing box 200 in embodiment 2 of the utility model is shown. The same parts of the processing box 200 as those in the above-mentioned embodiment 1 will not be repeated in this embodiment. The difference is that the structure of the first coupling member 210 is different. Specifically, the first coupling member 210 also includes a surface 211 arranged to cross the direction of the rotation axis of the first coupling member 210, and a first protrusion 214 extending from the surface 211 to the right (i.e., in the direction away from the photosensitive drum 103 in the left and right directions). The first protrusion 214 also includes a first protrusion extending from the surface 211 in the left and right directions and capable of receiving a driving force. A surface 214a and a second surface 214b located on the downstream side of the first surface 214a in the rotation direction of the first coupling member 210 and capable of receiving the braking force, and a third surface 214c extending from the upstream side of the first surface 214a to a position adjacent to the second surface 214b, wherein the first surface 214a has substantially the same structure as that in the above-mentioned embodiment, and since it has been described in the above-mentioned embodiment 1, it will not be repeated here; the structures of the second surface 214b and the third surface 214c are changed, wherein the third surface 214c includes a first portion 214e and a second portion 214e adjacent to each other. 214f, the first portion 214e is located on the upstream side of the first surface 214a in the rotation direction of the first coupling member 210, and the second portion 214f ​​is located on the downstream side of the first surface 214a in the rotation direction of the first coupling member 210 and is arranged adjacent to the second surface 214b; the first portion 214e is configured not to face the downstream side of the rotation direction of the first coupling member 110, and it is not further away from the left end of the shell in the left-right direction than the right end of the first surface 214a. One structure is that the first portion 214e is a surface facing the upstream side of the rotation direction of the first coupling member 210, and the other ... second portion 214f ​​is located on the downstream side of the first surface 214a in the rotation direction of the first coupling member 210. The structure is that the first part 214e is constructed as a surface perpendicular to the rotation axis of the first coupling member 210, that is, measured along the rotation axis direction (left-right direction) of the first coupling member 210, the distance from the left end of the shell to the first part 214e gradually increases or remains unchanged as it extends in the downstream direction of the rotation direction of the first coupling member 210; preferably, the third surface 214c is perpendicular to the left-right direction, that is, the third surface 214c is not set as an inclined surface inclined relative to the left-right direction, which further simplifies the structure of the first coupling member 210 and reduces the production cost. Further, the second part 214f ​​is constructed as an inclined surface inclined relative to the left-right direction, measured along the direction in which the rotation axis of the first coupling member 210 extends, and the distance from the left end of the shell to the second part 214f ​​gradually decreases as it extends in the downstream direction of the rotation direction of the first coupling member 210. The second part 214f ​​can be used to guide the force claw 21 to engage with the second surface 214b during the coupling process between the first coupling member 210 and the first drive unit 8, thereby improving the success rate of the coupling between the two.

[0063] Furthermore, the distance from the rotation axis to the first portion 214e of the third surface 214c measured along a line extending in a direction perpendicular to the rotation axis of the photosensitive drum 203 is not less than the farthest distance of the second surface 214b from the rotation axis. That is, it has two structures. The first structure is that the distance from the rotation axis to the first portion 214e of the third surface 214c measured along a line extending in a direction perpendicular to the rotation axis of the photosensitive drum 203 is greater than the farthest distance of the second surface 214b from the rotation axis. The other structure is that the distance from the rotation axis to the first portion 214e of the third surface 214c measured along a line extending in a direction perpendicular to the rotation axis of the photosensitive drum 203 is equal to the farthest distance of the second surface 214b from the rotation axis. That is, the thickness of at least a portion of the first protrusion 214 in the radial direction (in a direction perpendicular to the left and right direction) is reduced. Without significantly reducing the strength of the first protrusion 214, the material usage of the first protrusion 214 is reduced, thereby reducing the production cost. Preferably, the distance from the rotation axis to the first portion 214e of the third surface 214c measured along a line extending perpendicular to the rotation axis of the photosensitive drum 203 is equal to the farthest distance from the second surface 214b to the rotation axis. On the one hand, the strength of the first protrusion 214 can be ensured as much as possible, while also preventing it from being too thin, resulting in unstable contact during the process of the second portion 214f ​​of the third surface 214c guiding the force claw 21. As a change in the structure of the second surface 214b, the first protrusion 214 also includes a fifth surface 214g, which is arranged between the first surface 214a and the second surface 214b in the rotation direction of the first coupling member 210. In other words, when viewed along the direction of the rotation axis of the first coupling member 210, the fifth surface 214g has an overlapping portion with the third surface 214c in the rotation direction of the first coupling member 210. In the radial direction, in the direction perpendicular to the rotation axis of the first coupling member 310, the fifth surface 214g is arranged at a position farther away from the rotation axis of the first coupling member 310 than the second surface 214b. The fifth surface 214g is configured as a surface facing the downstream side of the rotation direction of the first coupling member 210, which remains parallel to the left and right direction. In other words, the fifth surface 214g extends rightward from the surface 211 and is perpendicular to the surface 211, so as to further reduce the number of inclined surfaces of the first coupling member 210 on the previous basis, simplify the structure of the first coupling member 210, and reduce the production cost.

[0064] Example 3

[0065] like Figure 14-16As shown, a first coupling member 310 in a processing box in embodiment 3 of the utility model is shown. The first coupling member 310 in this embodiment is the same as that in the above-mentioned embodiments 1-2, and will not be repeated in this embodiment. The difference is that the structure of the surface 311 of the first coupling member 310 is different.

[0066] like Fig.14 As shown, the first structure of the surface 311 is that the surface 311 is constructed as a plane that is not perpendicular to the left and right direction, that is, the surface 311 is constructed as a plane that does not extend perpendicular to the left and right direction, that is, the surface 311 remains inclined relative to the left and right direction.

[0067] like Fig.15 As shown, the second structure of the surface 311 is that the surface 311 is configured as a conical surface, and the surface 311 can be as follows Fig.15 The surface shown in the figure that is recessed toward the left end of the processing box may also be the surface that is recessed toward the right end of the processing box that is not shown in the figure, which is not limiting.

[0068] like Fig.16 As shown, the third structure of the surface 311 is that the surface 311 is configured as a corrugated surface.

[0069] Generally speaking, the surfaces 311 in this embodiment are all surfaces that are not perpendicular to the left-right direction.

[0070] Example 4

[0071] like Fig.17 As shown, a processing box in embodiment 4 of the utility model is shown. The same parts of the processing box as those in the above-mentioned embodiments 1-3 will not be repeated in this embodiment. The difference is that the structure of the first coupling member 410 of the processing box is different. The structure of the first coupling member 410 will be described in detail below.

[0072] The first coupling member 410 also includes a first protrusion 414, the first protrusion 414 includes a first surface 414a that can receive the driving force of the driving surface 14a of the driving force applying member 10 and a second surface 414b that can receive the braking force of the force receiving claw 21 of the braking force applying member 20, and a third surface 414c provided at the right end of the first protrusion 414, the third surface 414c is arranged to be arranged between the first surface 414a and the second surface 414b in the rotation direction of the first coupling member 410. In other words, the third surface 414c is arranged at the first The coupling member 410 extends from the downstream side of the first surface 414a to the adjacent second surface 414b in the rotation direction, and the distance from the left end of the photosensitive drum 403 to the third surface 414c decreases as it extends in the downstream direction of the rotation direction of the first coupling member 410. That is, the third surface 414c is constructed to be an inclined surface cross-set in a direction perpendicular to the left-right direction, and the structure of the inclined surface helps to guide the force claw 21 of the braking force applying member 20 to engage with the second surface 414b, thereby improving the success rate of the engagement of the braking force applying member 20 with the second surface 414b.

[0073] Furthermore, the first coupling member 410 in the present embodiment further includes a positioning column 415 protruding to the right from the surface 411, the positioning column 415 is coaxially arranged with the first coupling member 410, and the positioning column 415 can be used to position the first coupling member 410 during the coupling process between the first coupling member 410 and the first drive unit 8 to ensure the coupling stability of the first coupling member 410; a shield portion 417 is also provided at the right end of the first coupling member 410, specifically, the shield portion 417 is provided at the extended end of the positioning column 415, the shield portion 417 is constructed as a protrusion protruding outward from the outer peripheral surface of the positioning column 415, the shield portion 417 has a shield surface 417a facing the right side of the first coupling member 410, the shield surface 417a is arranged on the right side of the third surface 414c in the left-right direction, and preferably, a pair of shield portions 417 are provided, and the pair of shield portions 417 are spaced apart in the rotation direction of the first coupling member 410. In the rotation direction of the first coupling member 410, a notch 416 is provided between a pair of shielding plate portions 417, and when viewed from right to left, the third surface 414c and the notch 416 have an overlapping portion, and a portion of the third surface 414c is exposed to the right side of the first coupling member 410 through the notch 416; in the process of coupling the first coupling member 410 with the first driving unit 8, when the force claw 21 of the braking force applying member 20 moves in the left-right direction toward the direction close to the first coupling member 410, one of the position states of the force claw 21 is: the extended end of the force claw 21 overlaps with the notch 416 in the rotation direction of the first coupling member 410 and is completely placed in the notch 416, at this time, the force claw 21 can directly pass through the notch 416 and abut against the third surface 414c, and as the first driving unit 8 further rotates, the force claw 21 can engage with the second surface 414b under the guidance of the third surface 414c;Another position state of the force claw 21 is: the extended end of the force claw 21 and the notch 416 are staggered and spaced at a certain angle in the rotation direction of the first coupling member 410. At this time, the extended end of the force claw 21 can be blocked by the shield surface 417a of the shield part 417, so that it cannot move further toward the direction close to the photosensitive drum 403. However, with the further rotation of the first driving unit 8, the extended end of the force claw 21 can slide on the shield surface 417a of the shield part 417 until the extended end of the force claw 21 and the notch 416 face each other, and the force claw 21 can be separated from the shield part 417. The force claw 21 enters the notch 416 by contacting the shield surface 417a, and then the force claw 21 can directly pass through the notch 416 and abut against the third surface 414c. As the first driving unit 8 further rotates, the force claw 21 can be combined with the second surface 414b under the guidance of the third surface 414c. Therefore, no matter what position the force claw 21 is in, the force claw 21 can be engaged with the second surface 414b under the guidance of the third surface 414c. Therefore, by providing the shield part 417, the force claw 21 can be accurately guided to engage with the second surface 414b, avoiding the force claw 21 from engaging with the first surface 414a. ;

[0074] Example 5

[0075] like Figure 18-24 As shown, a processing box 500 in embodiment 5 of the utility model is shown. The processing box 500 includes but is not limited to the same parts as those in the above-mentioned embodiment 4, such as: a first protrusion 514 set on the first coupling member 510, a first surface 514a set on the upstream side of the first protrusion 514, a second surface 514b set on the downstream side, a third surface 514c extending from the downstream side of the first surface 514a to the adjacent second surface 514b, and a shielding portion 517. The structures of these components and the positional relationship between them are generally the same as those in the above-mentioned embodiment 4, and will not be repeated in this embodiment.

[0076] The difference is that the first coupling member 510 includes a first portion 518 and a second portion 519 which are separately arranged and connected to each other, the second portion 519 is fixedly mounted on the right end of the photosensitive drum 503, and the first portion 518 is movably mounted on the second portion 519, that is, the first portion 518 is movable relative to the second portion 519. Specifically, the first portion 518 is provided with a slide groove 519a extending in the left-right direction, and the second portion 519 is provided with a rib 519a, and the slide groove 518a can be installed in cooperation with the rib 519a. The first portion 518 is moved by the slide groove 518 a slides on the rib 519a and can move in the left and right directions relative to the second part 519, that is, the slide groove 518a and the rib 519a define the movement trajectory of the first part 518. As an option, the first part 518 can be provided with a rib and the second part 519 can be provided with a slide groove, which can also achieve the technical effect of moving the first part 518 according to a predetermined movement path. In general, in this embodiment, one of the first part 518 and the second part 519 is provided with a slide groove, and the other is provided with a rib, and the slide groove and the rib can be installed in coordination; further, The first part 518 and the second part 519 are clearance-fitted in the rotational direction and radial direction of the first coupling member 510, that is, the slide groove 518a and the rib 519a are clearance-fitted, and the outer wall of the first part 518 and the inner wall of the second part 519 are clearance-fitted. Specifically, in the rotational direction of the first coupling member 510, the width of the slide groove 518a is greater than the width of the rib 519a, and the first part 518 is rotatable relative to the second part 519 in the rotational direction of the first coupling member 510. In the radial direction, the outer wall diameter of the first part 518 is smaller than the inner wall diameter of the second part 519. The inner wall diameter of the first part 518 is swingable in the radial direction relative to the second part 519. The beneficial effect is that when the first drive unit 8 is intended to couple with the first coupling member 510 during the extension or rotation process, the first drive unit 8 has a probability of having its rotation axis not being coaxial with the rotation axis of the first coupling member 8. At this time, the swingable and rotatable first part 518 can still be successfully coupled with the first drive unit 8 after swinging and rotating a certain angle. Finally, the first coupling member 510 rotates coaxially with the first drive unit 8 and can receive the driving force output by the first drive unit 8.

[0077] Furthermore, in order to prevent the first part 518 and the second part 519 from detaching from each other, a locking portion 518b (also referred to as an anti-detachment portion) is provided on the first part 518, and a locked portion 519c (also referred to as a connecting portion) is correspondingly provided on the second part 519. The first part 518 is locked on the locked portion 519c by the locking portion 518b so that the two can be connected to each other. Preferably, the locking portion 518b is constructed as an elastic buckle structure provided on one end of the first part 518 close to the second part 519, and the locked portion 519c is constructed as an abutment surface provided at the left end of the second part 519. When the first part 518 and the second part 519 are assembled, the elastic buckle The first part 518 can be fastened to the abutment surface through the through holes 519b formed on the second part 519 and exposed on the left and right sides of the first coupling member 510, so that the first part 518 can be stably connected to the second part 519. Similarly, optionally, an abutment surface can be set on the first part 518 and an elastic buckle can be set on the second part 519, which can also achieve the same technical effect as above; and the structure that connects the first part 518 and the second part 519 to each other is not limited to the structure of the above-mentioned elastic buckle and the abutment surface. In some optional embodiments, the first part 518 and the second part 519 can also be connected to each other by connecting members such as retaining springs and screws, which is not limited.

[0078] Furthermore, an elastic member 516 is also provided between the first portion 518 and the second portion 519. The elastic member 516 is preferably a compression spring. After the first portion 518 and the second portion 519 are connected to each other in the above structure, the elastic force generated by the elastic member 516 can be applied to the first portion 518, so that the first portion 518 is maintained in the extended position. After the first portion 518 is pressed by an external force from right to left, the first portion 518 can resist the elastic force of the elastic member 516 and retract in the left-right direction toward the side close to the photosensitive drum 503, and move from the extended position to the retracted position. The first portion 518 in the extended position is farther away from the left end of the photosensitive drum 503 in the left-right direction than the second portion 519 in the retracted position. During the coupling process of the first coupling member 510 and the first drive unit 8, the first drive unit 8 can push the first portion 518 to retract inward for a distance and move from the extended position to the retracted position. At this time, the first coupling member 510 maintains elastic contact with the first drive unit 8, and the connection stability between the two will be greatly improved.

[0079] Furthermore, the maximum distance of the first surface 514a from the rotation axis of the first coupling member 510 in the radial direction (the direction perpendicular to the left and right direction) is K, 6.7mm≤K≤6.95mm. Increasing the K value to 6.7mm or above can increase the width of the first surface 514a in the radial direction, thereby increasing the contact area with the driving surface 14a of the driving force applying member 10 in the radial direction. However, when the K value is greater than 6.95, there is a possibility of interference between the outer peripheral surface of the first part 518 and the inner peripheral surface of the driving force applying member 10 during the coupling process. Therefore, when the K value is within the above range, the best coupling effect is achieved.

[0080] Furthermore, on one hand, in order to ensure that the coupling amount between the first part 518 of the first coupling member 510 and the driving force applying member 10 in the left-right direction is sufficient, the first part 518 can be set to protrude more to the right as much as possible. However, at the same time, in order to avoid the first part 518 protruding more to the right from interfering with the first driving unit 8 during the installation of the processing box 500 to the imaging device 1, there are requirements for the position of the first part 518 in the left-right direction. Specifically, the right end face of the second coupling member 509 is measured as the reference plane, and the right end face of the first coupling member 510 is at a distance L from the right end face of the second coupling member 509. In one embodiment, the right end face of the first coupling member 510 is farther away from the left end of the photosensitive drum 503 in the left-right direction than the right end face of the second coupling member 509. Preferably, 0mm<L≤2mm; another embodiment is that the right end face of the first coupling member 510 and the right end face of the second coupling member 509 are kept flush in the left-right direction or are closer to the left end portion of the photosensitive drum 503 in the left-right direction than the right end face of the second coupling member 509, preferably, 0mm≤L≤1mm, when the first part 518 is within the above two distance ranges, it can ensure that the first part 518 of the first coupling member 510 and the driving force applying member 10 have a sufficient amount of coupling in the left-right direction, and also avoid the first part 518 from interfering with the first driving unit 8 during the installation of the processing box 500 to the imaging device 1; more preferably, the right end face of the first coupling member 510 is farther away from the left end portion of the photosensitive drum 503 in the left-right direction than the right end face of the second coupling member 509, 0.5mm≤L≤1.7mm.

[0081] A portion of the first coupling member 510 is constructed to be elastically movable relative to the photosensitive drum 503. When coupled with the driving unit of the imaging device, the first coupling member 510 is in elastic contact with the driving unit of the imaging device. This structure helps the first coupling member 510 to maintain a close engagement with the driving unit of the imaging device, thereby avoiding the problem of the first coupling member 510 being accidentally decoupled from the driving unit of the imaging device during the operation of the processing box.

Claims

1. A processing box, comprising: frame; A photosensitive drum is rotatably supported on the frame and is rotatable about a photosensitive drum rotation axis extending in the left-right direction; The process cartridge further comprises a first coupling member, the first coupling member can receive an external force and can drive the photosensitive drum to rotate; the first coupling member comprises a first part and a second part, the second part is connected to the photosensitive drum, the first part is movably connected to the second part, an elastic member is arranged between the first part and the second part, the first part has an extended position and a retracted position, in the left-right direction, compared with the first part located at the retracted position, at least a part of the first part located at the extended position is further away from the photosensitive drum, when the first part is not subjected to an external force, the first part is maintained at the extended position, and the first part comprises: A first surface extending in the left-right direction in a direction away from the photosensitive drum; a second surface located on a downstream side of the first surface in the rotation direction of the first coupling member, the second surface extending in a direction away from the photosensitive drum; A third surface, at least a portion of which is located between the first surface and the second surface in the rotation direction of the first coupling member, and a distance from the right end of the photosensitive drum to the third surface measured in the left-right direction decreases along the extension of the third surface in the rotation direction of the first coupling member.

2. The process cartridge according to claim 1, wherein: The second surface is arranged obliquely with respect to the left-right direction.

3. The process cartridge according to claim 1, wherein: One of the first part and the second part is provided with a rib, and the other is provided with a slide groove. The first part is mounted by the cooperation of the rib and the slide groove so that the first part can move relative to the second part along a predetermined path.

4. The process cartridge according to claim 1, wherein: One of the first part and the second part is provided with an anti-detachment part, and the other part is provided with a connecting part. The first part can be prevented from being separated from the second part by the connection between the anti-detachment part and the connecting part.

5. The process cartridge according to claim 4, wherein: One of the anti-detachment portion and the connecting portion is configured as an elastic buckle.

6. The process cartridge according to claim 1, wherein: In a radial direction perpendicular to the left-right direction, a portion of the first surface is at a maximum distance K from the rotation axis of the first coupling member, where 6.7 mm≦K≦6.95 mm.

7. The process cartridge according to claim 1, wherein: The process cartridge further includes a developing roller and a second coupling member that can receive an external force and drive the developing roller to rotate, wherein a right end surface of the first coupling member is farther from the photosensitive drum than a right end surface of the second coupling member in the left-right direction.

8. The process cartridge according to claim 7, wherein: Taking the right end surface of the second coupling member as a reference surface for measurement, in the left-right direction, the right end surface of the first coupling member and the right end surface of the second coupling member have a distance L, wherein 0 mm<L≤2 mm.

9. The process cartridge according to claim 8, wherein: 0.5mm≤L≤1.7mm.

10. The process cartridge according to claim 1, wherein: The processing box also includes a developing roller and a second coupling member that can receive external force and drive the developing roller to rotate. In the left-right direction, the right end face of the first coupling member is flush with the right end face of the second coupling member or is closer to the photosensitive drum than the right end face of the second coupling member. The right end face of the second coupling member is measured as a reference plane. In the left-right direction, the right end face of the first coupling member is at a distance L from the right end face of the second coupling member, wherein 0mm≤L≤1mm.

Images