Driving force receiving assembly with elastic sleeve, photosensitive drum assembly and processing box

Abstract

The utility model provides a driving force receiving assembly with an elastic sleeve, a photosensitive drum assembly and a processing box. The driving force receiving assembly comprises a base, the driving force receiving assembly further comprises a first protruding column extending in the axial direction of the coupling piece, the first protruding column is sleeved with an elastic sleeve, a driving force receiving face is formed on the first side of the elastic sleeve in the circumferential direction of the coupling piece, a braking force receiving face is formed on the second side of the elastic sleeve, and the elastic sleeve is provided with a protruding column containing cavity and a filling part located on one side of the protruding column containing cavity. And the filling part is made of a high-elasticity material in a region close to the braking force receiving surface. The driving force receiving assembly is arranged at the end part of the photosensitive drum assembly. The processing box is provided with the photosensitive drum assembly. The driving force output device can prevent a brake part of the driving force output device from being damaged, and ensures the driving reliability of the photosensitive drum assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic imaging, and specifically, to a driving force receiving component, a photosensitive drum component with such a driving force receiving component, and a processing cartridge. Background Art

[0002] Printers are common office equipment. Common printers include inkjet printers and laser printers. Inkjet printers use ink cartridges as consumable containers and spray ink onto printing media such as paper to form characters or patterns on the paper. Laser printers use processing cartridges as consumable containers and form characters or patterns on printing media such as paper through electronic imaging.

[0003] Existing processing cartridges are provided with devices such as a developing roller, a charging roller, and a photosensitive drum. The developing roller, charging roller, photosensitive drum, etc. are rotatably supported at both ends of the housing of the processing cartridge. When a laser printer works, it is necessary to drive the developing roller, charging roller, photosensitive drum, etc. to rotate. For this purpose, a driving force output device is provided in the laser printer, and a driving force receiving component is provided at the end of the photosensitive drum. After the photosensitive drum is installed in the laser printer, the driving force receiving component cooperates with the driving force output device, and the driving force output device of the laser printer rotates, thereby driving the driving force receiving component of the processing cartridge to rotate.

[0004] See Figures 1 to 4 , the driving force output device of the existing laser printer includes a sleeve 10. The sleeve 10 includes a hollow cylindrical barrel 11. A plate body 12 is provided at one end of the barrel 11. A driving member 20 is provided near the open end of the barrel 11. The driving member 20 has a driving force transmission surface 21. On the end surface of the sleeve 10, the driving member 20 is provided with an abutting surface 23. An inclined surface 22 is formed between the abutting surface 23 and the driving force transmission surface 21. In addition, a limiting rod 14 is also provided on the open end of the sleeve 10. The driving member 20 is used to apply a driving force to the driving force receiving component of the photosensitive drum to drive the driving force receiving component to rotate. However, after the photosensitive drum rotates, after the driving force output device stops rotating, the driving force receiving component may continue to rotate under the action of inertia, resulting in the photosensitive drum not staying at the desired position. For this purpose, a braking force needs to be applied to the driving force receiving component so that the driving force receiving component stops rotating under the action of the braking force.

[0005] A braking member 50, 51 is also provided within the sleeve 10, and a braking component 30 is provided near the open end of the sleeve 10. A braking force transmission member 40 is provided between the braking members 50, 51 and the braking component 30. The braking members 50, 51 are provided at one end close to the plate body 12. The braking force transmission member 40 has a rod body 41, and the end of the rod body 41 is inserted into the braking member 51. When the braking member 51 rotates, it drives the braking force transmission member 40 to rotate. In addition, a spring 45 is sleeved outside the rod body 41.

[0006] The braking component 30 is provided at one end of the braking force transmission member 40 away from the braking member 50, and a spring 38 is provided between the braking component 30 and the braking member 51. The outer diameter of the spring 38 is larger than the outer diameter of the spring 45. Therefore, the spring 38 is located radially outside the spring 45. The braking component 30 is provided with a base 31, and two sets of braking claws 33 are formed on the base 31. The braking claws 33 have a braking force transmission surface 34 arranged obliquely, and the braking force transmission surface 34 can output braking force to the driving force receiving component to limit the rotation of the driving force receiving component. In addition, the braking claws 33 are provided with braking protrusions 36 on the radially inner side of the sleeve 10.

[0007] The existing driving force receiving component has a coupling, and a structure cooperating with the driving force transmission surface 21 and the braking force transmission surface 34 is provided on the coupling, so that the driving force receiving component can receive the driving force and braking force output by the driving force output device. However, the thickness of the braking claws 33 of the braking component 30 of the existing driving force output device is small. If the driving force receiving component is directly engaged with the driving force output device, it is easy to damage the braking claws 33 during the engagement process. In addition, since both the braking claws 33 and the driving force receiving component on the photosensitive drum assembly are rigid members, when the driving force output device is engaged with the driving force receiving component, the braking claws 33 directly contact the rigid engagement structure, which is more likely to cause damage to the braking claws 33. Once the braking claws 33 are damaged, the driving force output device will not be able to accurately control the photosensitive drum assembly at a specific position, affecting the operation of the laser printer. Summary of the Utility Model

[0008] The first object of the present utility model is to provide a driving force receiving component with an elastic sleeve that can effectively avoid damage to the driving force output device.

[0009] The second object of the present utility model is to provide a photosensitive drum assembly having the above driving force receiving component.

[0010] The third object of the present utility model is to provide a processing cartridge having the above photosensitive drum assembly.

[0011] To achieve the first object of the present utility model, the driving force receiving assembly with an elastic sleeve provided by the present utility model includes a coupling member, and the coupling member includes a base; the driving force receiving assembly further includes a first convex column extending along the axial direction of the coupling member, and an elastic sleeve is sleeved outside the first convex column. Along the circumferential direction of the coupling member, a driving force receiving surface is formed on the first side of the elastic sleeve, and a braking force receiving surface is formed on the second side of the elastic sleeve. The elastic sleeve has a convex column receiving cavity and a filling portion located on one side of the convex column receiving cavity. The filling portion is made of a highly elastic material in the area close to the braking force receiving surface.

[0012] As can be seen from the above solution, an elastic sleeve is sleeved outside the first convex column, and the elastic sleeve is made of a highly elastic material at the position close to the braking force receiving surface. When the first convex column and the elastic sleeve are inserted into the gap between the braking component and the driving component, the braking claw will abut against the highly elastic material, and through the buffering effect of the highly elastic material, damage to the braking claw can be avoided.

[0013] A preferred solution is that the axial first end of the base of the coupling member protrudes axially along the axial direction of the coupling member to form a pressing block. A positioning hole is provided at the axial end of the pressing block, and at least one pressing portion is provided on the pressing block in the radial direction; an active member that moves axially along the coupling member is provided inside the coupling member. An elastic reset member is provided between the active member and the base, and both ends of the elastic reset member respectively abut against the active member and the base; the first convex column is provided on the active member.

[0014] Thus, the driving force receiving assembly is provided with an active member that can move relative to the coupling member. The first convex column is provided on the active member, and the elastic sleeve sleeved on the first convex column forms a driving force receiving surface and a braking force receiving surface. That is, the first convex column and the elastic sleeve can be inserted into the driving force output device and cooperate with the driving component and the braking claw. The driving force and the braking force are received through the active member, so that the laser printer can accurately control the rotation position of the photosensitive drum assembly.

[0015] In addition, since the active member can extend or retract axially, and a pressing block is provided on the coupling member, when the braking claw cooperates with the pressing block during the installation of the processing cartridge, the braking claw will be driven by the pressing block to rotate relative to the sleeve, increasing the gap between the braking component and the driving component. At this time, the first convex column of the active member and the elastic sleeve are inserted into the gap between the braking component and the driving component, which is beneficial to the engagement between the driving force receiving assembly and the driving force output device.

[0016] A further solution is that along the axial direction of the coupling member, the filling portion includes a first elastic region and a second elastic region. The first elastic region is farther from the base than the second elastic region; the region close to the braking force receiving surface is the second elastic region, and the first elastic region is made of a low-elasticity material.

[0017] It can be seen that the first elastic region is used to cooperate with the first part of the brake pawl, and the second elastic region is used to cooperate with the second part of the brake pawl. The above settings can adapt to the special structure of the brake pawl, enabling the elastic sleeve to closely cooperate with the brake pawl and improving the stability of the braking force output.

[0018] An optional solution is that the first boss has a first column section away from the base and a second column section close to the base. Along the circumferential direction of the coupling member, the end face of the first column section on the second side is farther from the driving force receiving surface than the end face of the second column section on the second side; the filling parts are all made of high-elastic materials.

[0019] It can be seen that designing the shape of the first boss to match the shape of the brake pawl, and all the filling parts of the elastic sleeve are made of high-elastic materials, can reduce the manufacturing cost of the elastic sleeve, thereby reducing the production cost of the entire driving force receiving assembly.

[0020] A further solution is that an inclined surface is formed at the connection between the first column section and the second column section on the second side.

[0021] It can be seen that through the above structure, the outer contour of the first boss is consistent with the outer contour of the brake pawl, the cooperation between the first boss and the brake pawl is closer, and the transmission of the braking force is more stable.

[0022] A further solution is that the elastic sleeve is provided with a limiting hole at one end close to the base. In this way, through the limiting hole, it can cooperate with the limiting structure on the movable part, enabling the elastic sleeve to be firmly sleeved outside the first boss.

[0023] A further solution is that the movable part is further provided with at least one second boss, and a first abutting surface is formed at one end of the second boss away from the base.

[0024] It can be seen that by providing the second boss on the movable part, when the processing cartridge is installed in the laser printer, the driving force output device can abut against the second boss and push the movable part towards the base direction.

[0025] A further solution is that along the axial direction of the coupling member, the first abutting surface of the second boss is farther from the base than the end face of the elastic sleeve away from the base.

[0026] It can be seen that since the first abutting surface of the second boss is closer to the end of the driving force receiving assembly, the second boss is more easily pushed by the driving force output device and moves towards the base direction.

[0027] A further solution is that the second boss is further provided with a second abutting surface, and along the axial direction of the coupling member, the second abutting surface is closer to the base than the first abutting surface.

[0028] It can be seen that a second abutting surface is provided on the second convex post, and the second abutting surface is used to limit the rotation position of the braking claw, so as to prevent the braking claw from rotating freely and making the meshing between the driving force output device and the driving force receiving component closer.

[0029] To achieve the above second object, the photosensitive drum assembly provided by the present invention includes a main body portion, one end of the main body portion is provided with the above-mentioned driving force receiving component with an elastic sleeve, and the base of the coupling member is installed in the main body portion.

[0030] To achieve the above third object, the processing cartridge provided by the present invention includes a cartridge body, the cartridge body has two end caps, and the above-mentioned photosensitive drum assembly is provided in the cartridge body, and the photosensitive drum assembly is supported between the end caps. Brief Description of the Drawings

[0031] Figure 1 is a structural diagram of the driving force output device of a laser printer.

[0032] Figure 2 is an exploded structural diagram of the driving force output device of a laser printer.

[0033] Figure 3 is a structural diagram of the driving force output device of a laser printer from another perspective.

[0034] Figure 4 is an exploded structural diagram of the driving force output device of a laser printer from another perspective.

[0035] Figure 5 is a structural diagram of the processing cartridge according to the first embodiment of the present invention.

[0036] Figure 6 is a structural diagram of the photosensitive drum assembly according to the first embodiment of the present invention.

[0037] Figure 7 is an exploded partial structural diagram of the photosensitive drum assembly according to the first embodiment of the present invention.

[0038] Figure 8 is a structural diagram of the driving force receiving component with an elastic sleeve according to the first embodiment of the present invention.

[0039] Figure 9 is an exploded structural diagram of the driving force receiving component with an elastic sleeve according to the first embodiment of the present invention.

[0040] Figure 10 is a structural diagram of the coupling member of the driving force receiving component with an elastic sleeve according to the first embodiment of the present invention.

[0041] Figure 11It is a structural diagram of the movable part of the driving force receiving component with an elastic sleeve from the first perspective of the first embodiment of the present utility model.

[0042] Figure 12 It is a structural diagram of the movable part of the driving force receiving component with an elastic sleeve from the second perspective of the first embodiment of the present utility model.

[0043] Figure 13 It is an exploded view of the movable part of the driving force receiving component with an elastic sleeve of the first embodiment of the present utility model.

[0044] Figure 14 It is a structural diagram of the elastic sleeve of the driving force receiving component with an elastic sleeve from the first perspective of the first embodiment of the present utility model.

[0045] Figure 15 It is a structural diagram of the elastic sleeve of the driving force receiving component with an elastic sleeve from the second perspective of the first embodiment of the present utility model.

[0046] Figure 16 It is a cross-sectional view of the elastic sleeve of the driving force receiving component with an elastic sleeve of the first embodiment of the present utility model.

[0047] Figure 17 It is a structural diagram of the driving force receiving component with an elastic sleeve of the first embodiment of the present utility model.

[0048] Figure 18 It is a structural diagram of the driving force receiving component with an elastic sleeve of the first embodiment of the present utility model and the driving force output device in the first assembly stage.

[0049] Figure 19 It is a structural diagram of the driving force receiving component with an elastic sleeve of the first embodiment of the present utility model and the driving force output device in the second assembly stage.

[0050] Figure 20 It is a structural diagram of the driving force receiving component with an elastic sleeve of the first embodiment of the present utility model and the driving force output device in the second assembly stage with the sleeve hidden.

[0051] Figure 21 It is a structural diagram of the driving force receiving component with an elastic sleeve of the first embodiment of the present utility model in the second assembly stage.

[0052] Figure 22 It is a structural diagram of the driving force receiving component with an elastic sleeve of the first embodiment of the present utility model and the driving force output device in the third assembly stage with the sleeve hidden.

[0053] Figure 23 It is a structural diagram of the driving force receiving component with an elastic sleeve of the first embodiment of the present utility model and the braking component in the third assembly stage.

[0054] Figure 24 It is a structural diagram of the driving force receiving component with an elastic sleeve in the first embodiment of the present utility model during the third assembly stage and the braking claw.

[0055] Figure 25 It is a structural diagram of the driving force receiving component with an elastic sleeve in the first embodiment of the present utility model during the third assembly stage and the driving force output device.

[0056] Figure 26 It is a structural diagram of the driving force receiving component with an elastic sleeve in the first embodiment of the present utility model during the fourth assembly stage and the braking component.

[0057] Figure 27 It is a structural diagram of the driving force receiving component with an elastic sleeve in the first embodiment of the present utility model during the fifth assembly stage and the braking component.

[0058] Figure 28 It is a structural diagram of the driving force receiving component with an elastic sleeve in the first embodiment of the present utility model during the sixth assembly stage and the braking component.

[0059] Figure 29 It is a structural diagram of the driving force receiving component with an elastic sleeve in the first embodiment of the present utility model during the seventh assembly stage and the braking component.

[0060] Figure 30 It is a cross-sectional view of the elastic sleeve of the driving force receiving component with an elastic sleeve in the first embodiment of the present utility model during the seventh assembly stage.

[0061] Figure 31 It is a structural diagram of the driving force receiving component with an elastic sleeve in the second embodiment of the present utility model.

[0062] Figure 32 It is an exploded view of the structure of the driving force receiving component with an elastic sleeve in the second embodiment of the present utility model.

[0063] Figure 33 It is a structural diagram of the movable part of the driving force receiving component with an elastic sleeve in the second embodiment of the present utility model.

[0064] Figure 34 It is an exploded view of the structure of the movable part of the driving force receiving component with an elastic sleeve in the second embodiment of the present utility model from the first perspective.

[0065] Figure 35 It is an exploded view of the structure of the movable part of the driving force receiving component with an elastic sleeve in the second embodiment of the present utility model from the second perspective.

[0066] Figure 36It is a structural diagram of the first perspective of the elastic sleeve of the driving force receiving assembly with an elastic sleeve according to the second embodiment of the present utility model.

[0067] Figure 37 It is a structural diagram of the second perspective of the elastic sleeve of the driving force receiving assembly with an elastic sleeve according to the second embodiment of the present utility model.

[0068] Figure 38 It is a cross-sectional view of the elastic sleeve of the driving force receiving assembly with an elastic sleeve according to the second embodiment of the present utility model.

[0069] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. Specific embodiments

[0070] The processing cartridge of the present utility model is detachably installed in a laser printer. The processing cartridge contains toner as a printing consumable. A photosensitive drum assembly is provided in the processing cartridge. The driving force receiving assembly is provided at the end of the photosensitive drum assembly. The driving force receiving assembly in this embodiment is a driving force receiving assembly with an elastic sleeve. The driving force receiving assembly is used to receive the driving force and braking force output by the laser printer, so as to drive the photosensitive drum assembly to rotate, so that the photosensitive drum assembly rotates to a desired position.

[0071] First embodiment:

[0072] See Figure 5 , the processing cartridge 100 of this embodiment is detachably installed on a laser printer. Preferably, one or more processing cartridge accommodation chambers are provided in the laser printer, and each processing cartridge 100 is installed in a processing cartridge accommodation chamber. The processing cartridge 100 has a housing, and two end caps 101 and 102 are respectively provided at both ends of the housing. The photosensitive drum assembly 105 is rotatably supported between the two end caps 101 and 102. See Figure 6 And Figure 7 , the photosensitive drum assembly 105 has a cylindrical photosensitive drum core shaft. One end of the photosensitive drum core shaft is open, and a receiving chamber 106 is formed at the open end of the photosensitive drum core shaft. The driving force receiving assembly 110 is installed in the receiving chamber 106.

[0073] See Figure 8 And Figure 9 , the driving force receiving assembly 110 has a coupling member 120. The coupling member 120 includes a substantially cylindrical base 121. A bottom plate 122 is provided on the lower end surface of the base 121. The main body of the base 121 and the bottom plate 122 are detachably connected. After the bottom plate 122 is removed, the movable member 150, the elastic reset member 180, etc. can be installed in the base 121.

[0074] The coupling member 120 is provided with a support frame 130 at its first end in the axial direction. The support frame 130 extends axially from the end face of the base 121 away from the bottom plate 122 along the axial direction of the coupling member 120. The support frame 130 includes a plurality of support feet 131. The bottom of the support feet 131 is connected to the base 121, and a base surface 132 is formed at the top of the support feet 131. The base surface 132 is substantially parallel to the bottom plate 122. In this embodiment, the number of support feet 131 is four, and the plurality of support feet 131 are evenly arranged in the circumferential direction of the coupling member 120, and a gap 135 is formed between two adjacent support feet 131, as Figure 10 shown.

[0075] An extrusion block 140 is provided at one end of the support frame 130 away from the base 121. The extrusion block 140 extends axially outward from the base surface 132 along the axial direction of the coupling member 120. A positioning hole 141 is formed in the middle of the extrusion block 140. Preferably, the positioning hole 141 is a through hole, and the axis of the positioning hole 141 coincides with the axis of the coupling member 120. Two symmetrically arranged extrusion portions 145 are provided on the radially outer side of the extrusion block 140. Each extrusion portion 145 extends radially outward from the outer wall surface of the extrusion block 140, and the outer end surface of each extrusion portion 145 in the radial direction of the coupling member 120 is an extrusion surface 146. Preferably, the normal direction of the extrusion surface 146 is perpendicular to the axis of the coupling member 120.

[0076] From Figure 5 it can be seen that when the driving force receiving component 110 is installed in the receiving cavity 106, the driving force receiving component 110 is not completely located in the receiving cavity 106, but only the base 121 is installed in the receiving cavity 106, that is, the support frame 130, the extrusion block 140, etc. of the coupling member 120 are all exposed outside the photosensitive drum mandrel. When the driving force receiving component 110 rotates, it will drive the photosensitive drum mandrel to rotate. In order to enable the driving force receiving component 110 to better drive the photosensitive drum mandrel to rotate, a plurality of raised ribs 126 are provided on the outer wall surface of the base 121, and the photosensitive drum mandrel is driven to rotate through the interference fit between the ribs 126 and the inner wall of the photosensitive drum mandrel.

[0077] See Figure 9 , the driving force receiving component 110 further includes a movable member 150 and an elastic resetting member 180. See Figures 11 to 13 , the movable member 150 has a base 151, and the two ends of the elastic resetting member 180 are respectively abutted against the movable member 150 and the base 121. Specifically, the first end of the elastic resetting member 180 abuts against the lower surface of the base 151, that is, the surface close to the base 121, and the first end of the elastic resetting member 180 abuts against the bottom plate 122. In this way, the movable member 150 can move axially relative to the base 121 along the axial direction of the coupling member 120.

[0078] At the outer edge of the base 151, there are two first convex columns 155 and two second convex columns 160. The number of the first convex columns 155 is equal to the number of the extrusion parts 145 of the extrusion block 140, and the first convex columns 155 and the extrusion parts 145 are arranged in a one-to-one correspondence, that is, each first convex column 155 corresponds to an extrusion part 145. And, each first convex column 155 is sleeved with an elastic sleeve 170. From Figure 8 it can be seen that each first convex column 155 is arranged close to the corresponding extrusion part 145, and each first convex column 155 is located radially outside the corresponding extrusion part 145 along the coupling member 120.

[0079] Along the circumferential direction of the base 151, the first convex columns 155 and the second convex columns 160 are arranged at intervals. The number of the second convex columns 160 is also two, and the two second convex columns 160 are also symmetrically arranged on the base 151. In addition, each first convex column 155 and second convex column 160 passes through the gap 135 between two adjacent support feet 131. Therefore, each of the first convex columns 155 and second convex columns 160 is exposed outside the coupling member 120. From Figure 8 it can be seen that a part of the structure of the movable part 150 extends outside the support frame 130. Each of the first convex columns 155 and second convex columns 160 is arranged radially outside the extrusion block 140, and another part of the structure of the movable part 150 is located inside the base 121.

[0080] See Figure 13 , the first convex column 155 has a base 157 with a relatively large cross-sectional area. At the upper end of the base 157, there is an extension part 156 with a relatively small cross-sectional area. And, the shape of the extension part 156 is a cube, that is, along the axial direction of the coupling member 120, the cross-sectional shape of the extension part 156 remains the same.

[0081] See Figures 14 to 16 , each elastic sleeve 170 has a convex column accommodating part 171 and a filling part 172. Among them, the shape of the convex column accommodating part 171 is the same as the shape of the first convex column 155, and the first convex column 155 is completely accommodated in the convex column accommodating part 171. Along the circumferential direction of the coupling member 120, the filling part 172 is located on one side of the convex column accommodating part 171. And, the filling part 172 is generally in the shape of a cube, but the filling part 172 is not filled with one kind of material, but is filled with two different materials. As Figure 16As shown, the filling portion 172 forms a first elastic region 177 away from the base 121 and a second elastic region 178 close to the base 121. The first elastic region 177 is filled with a low-elasticity material, while the second elastic region 178 is filled with a high-elasticity material. In this embodiment, the stiffness of the low-elasticity material is greater than that of the high-elasticity material. It can be understood that the first elastic region 177 is filled with a first material, and the second elastic region 178 is filled with a second material, and the stiffness of the first material is greater than that of the second material. For example, the low-elasticity material is high-density sponge, and the high-elasticity material is low-density sponge.

[0082] Between the first elastic region 177 and the second elastic region 178 is an inclined surface, which is parallel to the inclined surface of the brake claw 33, so that the second elastic region 178 can be well matched with the brake claw 33. Along the circumferential direction of the coupling member 120, a driving force receiving surface 181 is formed on the first side of the elastic sleeve 170, and a braking force receiving surface 182 is formed on the second side of the elastic sleeve 170. The braking force receiving surface 182 is located on the outer surface of the second elastic region 178. Therefore, the second elastic region 178 is located close to the braking force receiving surface 182.

[0083] At the lower end of the elastic sleeve 170, that is, the end close to the base 121, a lower pendulum 175 is provided, and a limiting hole 176 is formed on the lower pendulum 175. A limiting structure matching the limiting hole 176, such as a limiting hook, can be provided on the movable member 150. By inserting the limiting hook into the limiting hole 176, the elastic sleeve 170 can be well fixed on the first convex column 155.

[0084] Preferably, the normal direction of the driving force receiving surface 181 is perpendicular to the axis of the coupling member 120, that is, the normal direction of the driving force receiving surface 181 is the same as the normal direction of the driving force transmission surface 21 of the driving force output device. After the driving force receiving assembly 110 is engaged with the driving force output device, the driving force receiving surface 181 cooperates with the driving force transmission surface 21, so that the driving force transmission surface 21 applies a driving force to the driving force receiving surface 181 to drive the driving force receiving assembly 110 to rotate.

[0085] The normal direction of the braking force receiving surface 182 is inclined to the axis of the coupling member 120. Preferably, the normal direction of the braking force receiving surface 182 is the same as the normal direction of the braking force transmission surface 34 of the brake claw 33 of the driving force output device. After the driving force receiving assembly 110 is engaged with the driving force output device, the braking force receiving surface 182 cooperates with the braking force transmission surface 34, and the braking force transmission surface 34 applies a braking force to the braking force receiving surface 182, thereby restricting the rotation of the driving force receiving assembly 110, so that the driving force receiving assembly 110 can stay at the desired position, thereby controlling the rotation angle of the photosensitive drum assembly 105.

[0086] Each second convex post 160 is located between two first convex posts 155. The second convex post 160 extends from the base 151 in a direction away from the base 121. The top end of the second convex post 160 forms a first abutting surface 161. A second abutting surface 162 is also provided on the second convex post 160. Along the axial direction of the coupling member 120, the second abutting surface 162 is closer to the base 121 than the first abutting surface 161. The provision of the second abutting surface 162 can limit the rotation of the braking member 30, thereby limiting the braking member 30, so that the first convex post 155 can be more smoothly inserted into the gap between the brake claw 33 and the driving member 20.

[0087] See Figure 17 , in the initial state, that is, before the processing cartridge 100 is installed in the laser printer, the driving force receiving component 110 is not subjected to the force applied by the printer. Therefore, the elastic reset member 180 is in the extended state. At this time, both the first convex post 155 and the second convex post 160 of the movable member 150 pass through the gap 135 between two adjacent support feet 131. And, along the axial direction of the coupling member 120, the distance between the first abutting surface 161 of the second convex post 160 and the base surface 132 of the support frame 130 is D1, and the distance D1 is between 2 mm and 3.5 mm. The distance between the top end surface 173 of the elastic sleeve 170 and the base surface 132 of the support frame 130 is D2. From Figure 17 It can be seen that D1 is slightly larger than D2. Preferably, the distance D2 is 0.2 mm to 0.5 mm larger than the distance D1.

[0088] The meshing process between the driving force receiving component 110 and the driving force output device of the laser printer during the installation of the processing cartridge 100 into the laser printer is introduced below. Before the driving force receiving component 110 meshes with the driving force output device, the driving force receiving component 110 is not restricted by the driving force or the braking force and can rotate freely about its own axis. When the processing cartridge 100 is installed in the laser printer, the driving force receiving component 110 first moves axially relative to the driving force output device, that is, the driving force receiving component 110 gradually approaches the driving force output device of the laser printer along the axial direction. When the driving force receiving component 110 approaches the driving force output device, first, the limiting rod 14 of the driving force output device slides into the positioning hole 141 of the coupling member 120 to achieve the preliminary positioning of the driving force output device and the driving force receiving component 110. At this time, the end of the driving force receiving component 110 will abut against the open end of the driving force output device, as Figure 18 shown. During the meshing process between the driving force output device and the driving force receiving component, the top of the elastic sleeve 170 first contacts the driving force output device. For example, the driving member 20 first abuts against the top of the elastic sleeve 170.

[0089] Since the elastic restoring force of the spring 38 of the driving force output device is greater than the elastic restoring force of the elastic resetting member 180 within the driving force receiving assembly 110, as the processing cartridge 100 continues to approach the driving force output device, the movable member 150 is squeezed by the driving member 20 such that the movable member 150 moves in the direction of the base 121. At this time, as Figure 19 and Figure 20 shown, both the first lug 155 and the second lug 160 of the movable member 150 move in the direction of the base 121, and the top of the elastic sleeve 170 will be pushed to a position flush with the base surface 132 of the support frame 130, as Figure 21 shown. Since the first abutting surface 161 of the second lug 160 is slightly higher than the top end surface 173 of the elastic sleeve 170, the first abutting surface 161 still protrudes outside the base surface 132 of the support frame 130.

[0090] Since the extrusion block 140 is farther from the base 121 relative to the movable member 150, that is, the extrusion block 140 has extended axially outside the movable member 150. Since the driving member 20 of the sleeve 10 presses against the top of the first lug 155, that is, abuts at the base surface 132, at this time, the driving force output device has been successfully inserted into the driving force receiving assembly 110, that is, the extrusion block 140 of the driving force receiving assembly 110 has extended into the sleeve 10. However, at this time, the driving force receiving assembly 110 and the driving force output device are not fully engaged.

[0091] Next, the driving force output device starts to rotate about its own axis. However, since the driving force receiving assembly 110 and the driving force output device are not fully engaged, the driving force output device and the driving force receiving assembly 110 can still rotate relative to each other, and the brake claw 33 of the braking member 30 can rotate relative to the coupling member 120, as Figure 22 shown.

[0092] As the driving force output device continues to rotate, the brake claw 33 will abut against the extrusion portion 145 of the extrusion block 140, as Figure 23 and Figure 24 shown. Along the radial direction of the coupling member 120, the inner diameter of the braking protrusion 36 of the brake claw 33 is slightly smaller than the outer diameter of the extrusion portion 145. Therefore, when the brake claw 33 rotates to a position where it cooperates with the extrusion portion 145, the braking protrusion 36 will abut against the extrusion surface 146 of the extrusion portion 145, and a large frictional force is formed between the braking protrusion 36 and the extrusion surface 146, and the extrusion portion 145 will hinder the rotation of the brake claw 33. Since the braking member 30 can rotate relative to the sleeve 10, as Figure 25 shown, when the sleeve 10 continues to rotate, the gap 37 between the driving member 20 and the brake claw 33 increases. At this time, a large gap is formed between the driving force transmission surface 21 of the driving force output device and the braking member 30.

[0093] Next, the driving force output device continues to rotate, causing the brake pawl 33 to continue to rotate. When the rotational force of the driving force output device is greater than the frictional force formed between the braking projection 36 and the pressing surface 146, the braking projection 36 no longer abuts against the pressing surface 146, and the brake pawl 33 is released. At the same time, due to the rotation of the driving force output device, the brake pawl 33 also rotates relative to the driving force receiving assembly 110. At this time, the brake pawl 33 no longer abuts against the top end surface 173 of the elastic sleeve 170, as Figure 26 shown. When the brake pawl 33 no longer abuts against the top end surface 173, the movable member 150 moves away from the base 121 under the elastic restoring force of the elastic restoring member 180, as Figure 27 and Figure 28 shown. The first convex column 155 of the movable member 150 moves towards the driving force output device, thereby driving the elastic sleeve 170 to move towards the driving force output device.

[0094] As the movable member 150 moves towards the driving force output device under the action of the elastic restoring member 180, the first convex column 155 extends into the gap 37 between the driving member 20 and the brake pawl 33. At the same time, since the brake pawl 33 is released, the braking member 30 will accelerate circumferentially to return to the position synchronized with the driving member 20, that is, after the brake pawl 33 is released, the braking member 30 will accelerate to rotate, causing the gap 37 between the driving member 20 and the brake pawl 33 to decrease.

[0095] After the first convex column 155 of the movable member 150 extends into the gap 37 between the driving member 20 and the brake pawl 33, as Figure 29 shown, the brake pawl 33 abuts against the filling portion 172 of the elastic sleeve 170. Since the lower end of the brake pawl 33, that is, the end close to the base 121, protrudes circumferentially outward, the lower end of the brake pawl 33 will abut against the second elastic region 178. Since the second elastic region 178 is filled with a highly elastic material, the second elastic region 178 undergoes elastic deformation under the action of the brake pawl 33, as Figure 30 shown. The brake pawl 33 abuts against the braking force receiving surface 182, thereby applying a braking force to the elastic sleeve 170.

[0096] Since the first elastic region 177 is filled with a low-elasticity material, the elastic deformation amount of the first elastic region 177 is small, so that after the brake pawl 33 and the elastic sleeve 170 are engaged, the outer contour of the elastic sleeve 170 matches the outer contour of the brake pawl 33.

[0097] In addition, the driving force receiving surface 181 of the elastic sleeve 170 is attached to the driving force transmission surface 21 of the driving member 20, and since the braking force receiving surface 181 of the elastic sleeve 170 is attached to the braking force transmission surface 34 of the braking claw 33, the first convex column 155 and the elastic sleeve 170 can receive the driving force output by the driving force output device and can also receive the braking force. In this way, the first convex column 155 can cooperate well with the gap 37, enabling the driving force output device to smoothly drive the driving force receiving assembly 110 to rotate.

[0098] On the one hand, since the elastic sleeve 170 is sleeved outside the first convex column 155, during the meshing process of the driving force receiving assembly 110 and the driving force output device, the lower end of the braking claw 33 does not directly contact the first convex column 155 made of rigid material, but abuts against the second elastic region 178 of the elastic sleeve 170. Since the second elastic region 178 is filled with a highly elastic material, when the braking claw 33 abuts against the second elastic region 178, the second elastic region 178 can undergo a relatively large degree of elastic deformation, thereby effectively buffering the stress of the braking claw 33 and effectively avoiding damage to the braking claw 33.

[0099] On the other hand, in the meshing process of the driving force receiving assembly 110 and the driving force output device in this embodiment, first, the moving member 150 is moved in the direction close to the base 121, that is, the first convex column 155 is retracted to one end of the coupling member 120, and then through the cooperation of the braking protrusion 36 and the extrusion block 140, the gap 37 between the driving member 20 and the braking claw 33 is increased. Subsequently, when the braking claw 33 no longer abuts against the first convex column 155, the moving member 150 moves in the direction close to the driving force output device, so that the first convex column 155 extends into the gap 37 between the driving member 20 and the braking claw 33. Since the first convex column 155 extends into the gap 37 when the gap 37 is relatively large, and after the first convex column 155 extends into the gap 37, the braking component 30 will accelerate to reset, reducing the gap 37, thereby realizing the meshing of the first convex column 155 with the braking component 30 and the driving member 20. In this way, during the meshing process of the driving force receiving assembly 110 and the driving force output device, the impact force of the elastic sleeve 170 on the braking claw 33 is small, which can further effectively reduce the impact force on the braking claw 33 and avoid the situation of damage to the braking claw 33.

[0100] In addition, since the first convex column 155 and the elastic sleeve 170 cooperate with both the driving member 20 and the braking component 30, that is, they receive both the driving force and the braking force, during the process of the driving force output device driving the photosensitive drum assembly 105 to rotate, the situation of the first convex column 155 disengaging from the driving force output device can be effectively avoided, improving the reliability of the drive.

[0101] Second Embodiment:

[0102] The processing cartridge of this embodiment is detachably installed on a laser printer. The processing cartridge has a housing, and two end caps are respectively provided at both ends of the housing. The photosensitive drum assembly is rotatably supported between the two end caps. Moreover, the photosensitive drum assembly has a cylindrical photosensitive drum mandrel, and the driving force receiving assembly is installed at one end of the photosensitive drum mandrel.

[0103] Refer to Figure 31 and Figure 32 , the power receiving assembly 210 has a coupling member 220. The coupling member 220 includes a substantially cylindrical base 221. A support frame 230 is provided at the first axial end of the coupling member 220. The support frame 230 includes a plurality of support feet 231. The bottoms of the support feet 231 are connected to the base 221, and a base surface 232 is formed at the tops of the support feet 231. In this embodiment, the number of the support feet 231 is four, and the plurality of support feet 231 are evenly arranged in the circumferential direction of the coupling member 220.

[0104] An extrusion block 240 is provided at the first end of the support frame 230. A hollow positioning hole 241 is formed in the middle of the extrusion block 240. Two extrusion portions 245 are provided on the radial outer side of the extrusion block 240. Each extrusion portion 245 extends radially outward from the outer wall surface of the extrusion block 240. The outer end surface of each extrusion portion 245 in the radial direction of the coupling member 220 is an extrusion surface 246.

[0105] The driving force receiving assembly 210 further includes a movable member 250 and an elastic reset member 280. Refer to Figures 33 to 35 , the movable member 250 has a base 251. The first end of the elastic reset member 280 abuts against the lower surface of the base 251, that is, the surface close to the base 221, and the first end of the elastic reset member 280 abuts against the bottom plate 222. In this way, the movable member 250 can move axially relative to the base 221 in the coupling member 220.

[0106] Two first convex columns 255 and two second convex columns 260 are provided at the outer edge of the base 251. The first convex columns 255 and the extrusion portions 245 are arranged in one-to-one correspondence. Moreover, an elastic sleeve 270 is sleeved on each first convex column 255. Each first convex column 255 is arranged close to the corresponding extrusion portion 245, and each first convex column 255 is located on the radial outer side of the corresponding extrusion portion 245 along the coupling member 220.

[0107] Along the circumferential direction of the base 251, the first convex columns 255 and the second convex columns 260 are arranged at intervals. Each first convex column 255 and second convex column 260 passes through the gap between two adjacent support feet 231. Therefore, each first convex column 255 and second convex column 260 is exposed outside the coupling member 220.

[0108] Different from the first embodiment, the shape of the first convex post 255 in this embodiment is different from that of the first convex post in the first embodiment. Specifically, the first convex post 255 in this embodiment has a base 256 with a relatively large cross-sectional area, and an extension part with a relatively small cross-sectional area is provided at the upper end of the base 256. In this embodiment, the extension part has a first column section 257 and a second column section 258. Among them, the first column section 257 is far from the base 221, the second column section 258 is close to the base 221, and the cross-sectional area of the first column section 257 is larger than the cross-sectional area of the second column section 258. And, a slope is formed at the connection of the first column section 257 and the second column section 258 on the second side, and this slope matches the slope of the braking pawl 33, that is, the inclination angle of the slope at the connection of the first column section 257 and the second column section 258 is equal to the inclination angle of the slope of the braking pawl 33.

[0109] A resilient sleeve 270 is sleeved outside each first convex post 255. Refer to Figures 36 to 38 , each resilient sleeve 270 has a convex post receiving portion 271 and a filling portion 272. Among them, the shape of the convex post receiving portion 271 is the same as that of the first convex post 255, and the first convex post 255 is completely received in the convex post receiving portion 271. Along the circumferential direction of the coupling member 220, the filling portion 272 is located on one side of the convex post receiving portion 271. Different from the first embodiment, the filling portion 272 is filled with a kind of material, that is, it is filled with a highly elastic material such as low-density sponge.

[0110] Along the circumferential direction of the coupling member 220, a driving force receiving surface 281 is formed on the first side of the resilient sleeve 270, and a braking force receiving surface 282 is formed on the second side of the resilient sleeve 270. And, along the circumferential direction of the coupling member 220, the end surface of the first column section 257 on the second side is farther from the driving force receiving surface 281 than the end surface of the second column section 258 on the second side. Among them, the second sides of the first column section 257 and the second column section 258 are the end surfaces far from the driving force receiving surface 281.

[0111] In addition, at the lower end of the resilient sleeve 270, that is, the end close to the base 221, a lower pendulum 275 is provided, and a limiting hole 276 is formed on the lower pendulum 275. A limiting structure matching the limiting hole 276 can be provided on the movable member 250, and through the cooperation of the limiting structure and the limiting hole 276, the resilient sleeve 270 can be well fixed on the first convex post 255.

[0112] The meshing process of the driving force receiving component and the driving force output device in this embodiment is the same as that in the first embodiment, which will not be elaborated here. The outer contour of the first convex column 255 in this embodiment is basically the same as the outer contour of the brake claw 33. Therefore, the entire filling portion 272 is filled with a highly elastic material. When the driving force receiving component meshes with the driving force output device, the brake claw 33 can be abutted into the filling portion 272 of the elastic sleeve 270, and the highly elastic material provides a buffering force for the brake claw 33 to avoid damage to the brake claw 33. In addition, since the outer contour of the first convex column 255 is basically the same as the outer contour of the brake claw 33, the brake claw 33 can cooperate well with the first convex column 255, so that the movable member 250 can receive the driving force and braking force output by the driving force output device, ensuring the precise control of the rotation position of the photosensitive drum assembly.

[0113] Finally, it should be emphasized that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A driving force receiving component with an elastic sleeve, comprising: A coupling member, the coupling member including a base; It is characterized in that: The driving force receiving component further includes a first convex post extending axially along the coupling member, an elastic sleeve is sleeved outside the first convex post, along the circumferential direction of the coupling member, a driving force receiving surface is formed on the first side of the elastic sleeve, a braking force receiving surface is formed on the second side of the elastic sleeve, the elastic sleeve has a convex post accommodating cavity and a filling portion located on one side of the convex post accommodating cavity, and the filling portion is made of a high-elastic material in a region close to the braking force receiving surface.

2. The driving force receiving component with an elastic sleeve according to claim 1, characterized in that: An extrusion block is formed by protruding axially from the first axial end of the base of the coupling member along the axial direction of the coupling member, a positioning hole is provided at the axial end of the extrusion block, and at least one extrusion portion is provided in the radial direction of the extrusion block; An active member moving axially along the coupling member is arranged inside the coupling member, an elastic reset member is arranged between the active member and the base, both ends of the elastic reset member are respectively abutted against the active member and the base, and the first convex post is arranged on the active member.

3. The driving force receiving component with an elastic sleeve according to claim 1, characterized in that: Along the axial direction of the coupling member, the filling portion includes a first elastic region and a second elastic region, and the first elastic region is farther from the base than the second elastic region; The region close to the braking force receiving surface is the second elastic region, and the first elastic region is made of a low-elastic material.

4. The driving force receiving component with an elastic sleeve according to claim 1, characterized in that: The first convex post has a first post segment away from the base and a second post segment close to the base, along the circumferential direction of the coupling member, the end surface of the first post segment on the second side is farther from the driving force receiving surface than the end surface of the second post segment on the second side; The filling portion is all made of a high-elastic material.

5. The driving force receiving component with an elastic sleeve according to claim 4, characterized in that: A slope is formed at the connection of the first post segment and the second post segment on the second side.

6. The driving force receiving component with an elastic sleeve according to any one of claims 1 to 4, characterized in that: A limiting hole is provided at one end of the elastic sleeve close to the base.

7. The driving force receiving component with an elastic sleeve according to claim 2, characterized in that: The active member is further provided with at least one second convex post, and a first abutting surface is formed at one end of the second convex post away from the base.

8. The driving force receiving component with an elastic sleeve according to claim 7, characterized in that: Along the axial direction of the coupling member, the first abutting surface of the second convex post is farther from the base than the end surface of the elastic sleeve away from the base.

9. A photosensitive drum assembly, including a main body part; It is characterized in that: One end of the main body part is provided with the driving force receiving component with an elastic sleeve according to any one of claims 1 to 8, and the base of the coupling member is installed inside the main body part.

10. Process cartridge, comprising a cartridge body having two end caps, characterized in that, The photosensitive drum assembly as described in claim 9 is provided inside the box, and the photosensitive drum assembly is supported between the end caps.

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