Developing cartridge

Abstract

The utility model relates to a developing box. The developing box comprises a box body; a developing roller for supplying a developer to the photosensitive drum; the moving shaft is arranged on the box body and can move along the length direction of the developing roller, and one end of the moving shaft is provided with a stress part for receiving the separation driving force; a driving member disposed on an end side of the developing cartridge, the driving member being movable in response to movement of the moving shaft; the transmission mechanism is arranged between the moving shaft and the driving component, and the moving shaft can drive the driving component to move through the transmission mechanism when moving; according to the developing box with the structure, only one end of the developing box receives the separation driving force, so that the developing box and the imaging equipment can be miniaturized, and the structure is simplified.

Description

Technical Field

[0001] The present application relates to a developing box for an electronic photographic imaging device. Background Art

[0002] In an electrophotographic imaging device such as a laser printer, a copier, a fax machine, etc., a developing cartridge is usually provided, and the developing cartridge has a developing roller for supplying a developer to a photosensitive drum. The developing cartridge can be installed separately to a drawer unit (the drawer unit is provided with a photosensitive drum) of the electrophotographic imaging device, or can be installed to the electrophotographic imaging device after forming a processing cartridge with a photosensitive drum cartridge having a photosensitive drum.

[0003] In an electronic photographic imaging device using contact developing technology, the developing roller and the photosensitive drum are in two states: contact and separation. In the prior art, it is necessary to respectively provide separation driving force receiving components at opposite ends of the developing cartridge, and the separation driving force receiving components can receive the separation driving force from the electronic photographic imaging device to move the developing cartridge from the position where the developing roller contacts the photosensitive drum to the position where the developing roller separates from the photosensitive drum.

[0004] There is a developing box that has force-bearing parts for receiving separation driving force at both ends in the length direction, and separation driving force applying mechanisms are provided on both sides of the corresponding imaging device. The developing box receives the driving force to separate the developing roller and the photosensitive drum. This structure is complex, not conducive to the miniaturization design of the imaging device and the developing box, and has a high cost. Utility Model Content

[0005] The main purpose of the utility model is to provide a developing box to solve the technical problems existing in the prior art.

[0006] In order to solve the above technical problems, the utility model discloses a developing box, comprising: a box body; a developing roller, used for supplying developer to a photosensitive drum; the developing box also comprises: a movable shaft, which is arranged on the box body and can move along the length direction of the developing roller, and one end of the movable shaft is provided with a force-bearing portion for receiving a separation driving force; a driving member, which is arranged on the end side of the developing box, and the driving member can move in response to the movement of the movable shaft; a transmission mechanism, which is arranged between the movable shaft and the driving member, and when the movable shaft moves, the driving member can be driven to move by the transmission mechanism.

[0007] Preferably, in the length direction of the developing roller, the force-bearing portion is located at one end of the developing box, and the driving member is located at the other end of the developing box.

[0008] Preferably, the driving member is a cam, and the cam is rotatably arranged on at least one end side of the developing roller; wherein the transmission mechanism is provided between the movable shaft and the cam, and the movable shaft can drive the cam to rotate through the transmission mechanism when it moves.

[0009] Preferably, the transmission mechanism is a gear transmission mechanism, and the gear transmission mechanism includes a first gear, a second gear, a rack and a third gear, the rotation axes of the first gear and the second gear are perpendicular to each other, and the rotation axes of the third gear and the second gear are parallel to each other;

[0010] The first gear has a first cylindrical gear portion and a first bevel gear portion, the second gear has a second cylindrical gear portion and a second bevel gear portion, the first cylindrical gear portion is meshed with the rack portion on the movable shaft, the first bevel gear portion is meshed with the second bevel gear portion, the second cylindrical gear portion and the third gear are both meshed with the rack; the third gear is connected to the cam and the rotation axes of the two coincide.

[0011] Preferably, the transmission mechanism includes a first rotating member, a second rotating member and a transmission belt, the first rotating member is sleeved on the movable shaft, the second rotating member is connected to the cam and the rotation axes of the two coincide, and the first rotating member and the second rotating member are connected through the transmission belt; the movable shaft is provided with a first thread, and the inner circumferential wall of the first rotating member is provided with a second thread matching the first thread.

[0012] Preferably, the driving member is a lever, which is rotatably disposed on at least one end side of the box body; wherein the lever can rotate in response to the movement of the movable shaft.

[0013] Preferably, the movable axis has a force-bearing portion located on the first end side of the box body, and the lever includes a first lever and a second lever, the first lever is arranged on the first end side of the box body, and the second lever is arranged on the second end side of the box body relative to the first end side.

[0014] Preferably, a connecting rod is provided between the first lever and the movable shaft, the connecting rod is rotationally matched with the box body, and the two ends of the connecting rod are rotationally and slidingly matched with the first lever and the movable shaft respectively; the second lever is rotationally and slidingly matched with the movable shaft.

[0015] Preferably, the developing box further comprises an elastic reset member for resetting the movable shaft.

[0016] Preferably, the developing box can be detachably installed in a drum box provided with a photosensitive drum, and the developing roller and the photosensitive drum can move between mutually contacting and separated positions; when the driving member moves in response to the movement of the movable shaft, the driving member can abut against the photosensitive drum; the direction of the force applied to the force-bearing part is parallel to the length direction of the developing roller.

[0017] The developing box with the above structure receives the separation driving force only at one end of the developing box, which can make the developing box and the imaging device miniaturized and simplify the structure.

[0018] In order to more clearly illustrate the purpose, technical solutions and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a structural diagram of a developing cartridge embodiment 1;

[0020] Figure 2 yes Figure 1 A magnified view of part A;

[0021] Figure 3 is a front view of the developing cartridge when the moving shaft receives the separation driving force from the electrophotographic image forming apparatus in Embodiment 1;

[0022] Figure 4 is a side view of the developing cartridge in Embodiment 1 when the moving shaft receives a separation driving force from the electrophotographic image forming apparatus;

[0023] Figure 5 The position of the developing cartridge relative to the photosensitive drum when the developing roller is separated from the photosensitive drum in Embodiment 1 is shown;

[0024] Figure 6 The position of the developing cartridge relative to the photosensitive drum when the developing roller contacts the photosensitive drum in Embodiment 1 is shown;

[0025] Figure 7 It is one of the structural diagrams of the developing cartridge embodiment 2;

[0026] Figure 8 This is the second structural diagram of the developing cartridge embodiment 2;

[0027] Fig. 9 is a third structural diagram of the developing cartridge embodiment 2, which shows the state of the developing cartridge when the moving shaft receives the separation driving force from the electrophotographic image forming device;

[0028] Fig.10 yes Fig. 9 A magnified view of part B;

[0029] Fig.11The matching structure between the moving shaft and the first rotating member in Embodiment 2 is shown;

[0030] Fig.12 is a side view of the developing cartridge when the developing roller is separated from the photosensitive drum in Embodiment 2;

[0031] Fig.13 is a side view of the developing cartridge when the developing roller is in contact with the photosensitive drum in Embodiment 2;

[0032] Fig.14 It is one of the structural diagrams of the developing cartridge embodiment 3;

[0033] Fig.15 This is the second structural diagram of the developing cartridge embodiment 3;

[0034] Fig.16 is a front view of the developing box when the developing roller is separated from the photosensitive drum in Example 3;

[0035] Fig.17 is a side view of the developing cartridge when the developing roller is separated from the photosensitive drum in Example 3;

[0036] Fig.18 is a front view of the developing box when the developing roller is in contact with the photosensitive drum in Example 3;

[0037] Fig.19 is a side view of the developing cartridge when the developing roller is in contact with the photosensitive drum in Example 3;

[0038] Fig. 20 It is one of the structural diagrams of the developing cartridge embodiment 4;

[0039] Fig.21 This is the second structural diagram of the developing cartridge embodiment 4;

[0040] Fig. 22 is a diagram showing the installation structure of the second elastic tube body in the developing cartridge embodiment 4;

[0041] Fig.23 is a front view of the developing cartridge when the moving shaft receives the separation driving force from the electrophotographic image forming apparatus in Embodiment 4;

[0042] Fig.24 is a perspective view of the developing cartridge when the moving shaft receives a separation driving force from the electrophotographic image forming apparatus in Embodiment 4;

[0043] Fig.25 is a side view of the developing cartridge when the developing roller is separated from the photosensitive drum in Embodiment 4;

[0044] Fig.26 This is a side view of the developing box when the developing roller is in contact with the photosensitive drum in Example 4. DETAILED DESCRIPTION

[0045] The present application discloses a developing box for installation in an electrophotographic imaging device, wherein the developing box receives a separation driving force applied from the electrophotographic imaging device only from one end side thereof to move to a position where a developing roller is separated from a photosensitive drum.

[0046] Example 1

[0047] like Figure 1 As shown, in Embodiment 1, a developing roller 102 and a moving shaft 11 extending along the length direction of the developing roller 102 are provided on the box body 101 of the developing box. The moving shaft 11 is arranged to move along the length direction of the developing roller 102, and a force receiving portion 111 for receiving a separation driving force is provided at one end of the moving shaft 11. The developing box includes a driving member and a transmission mechanism. The driving member is arranged at the end side of the developing box. The driving member can move in response to the movement of the moving shaft 11, so that the developing roller 102 is separated from the photosensitive drum 201. The transmission mechanism is arranged between the moving shaft 11 and the driving member. When the moving shaft 11 moves, the driving member can be driven to move through the transmission mechanism.

[0048] In this embodiment, the driving member is a cam 13, which is arranged on one end side of the developing roller 102, and the cam 13 and the force receiving portion 111 are respectively located at opposite ends of the box body 101 in the length direction of the developing roller 102. Preferably, the rotation axis of the cam 13 is arranged to coincide with the rotation axis of the developing roller 102. In Embodiment 1, the cam 13 is rotatably mounted on the roller shaft of the developing roller 102. As a variation of Embodiment 1, the cam 13 can also be mounted on the end cover 103 or the box body 101 of the developing box.

[0049] Furthermore, a gear transmission mechanism is provided between the movable shaft 11 and the cam 13 . When the movable shaft 11 moves in the length direction of the developing roller, the cam 13 is driven to rotate through the gear transmission mechanism, so that the developing roller 102 is separated from the photosensitive drum 201 .

[0050] Combination Figure 1 and 2 As shown, in Embodiment 1, the gear transmission mechanism includes a first gear 14, a second gear 15, a rack 16 and a third gear 17; the third gear 17 is connected to the cam 13, so that the cam 13 can rotate together with the third gear 17. The cam 13 and the third gear 17 can be integrally connected or formed into a split assembly connection, and the specific connection structure of the two is not limited, as long as the cam 13 can rotate together with the third gear 17.

[0051] Furthermore, the rotation axes of the first gear 14 and the second gear 15 are perpendicular to each other, the rotation axes of the third gear 17 and the second gear 15 are parallel to each other, and the rotation axis of the third gear 17 coincides with the rotation axis of the cam 13; the first gear 14 has a first cylindrical gear portion 141 and a first bevel gear portion 142, the second gear 15 has a second cylindrical gear portion 151 and a second bevel gear portion 152, the first cylindrical gear portion 141 is meshed with the rack portion 112 on the movable shaft 11, the first bevel gear portion 142 is meshed with the second bevel gear portion 152, and the second cylindrical gear portion 151 and the third gear 17 are both meshed with the rack 16.

[0052] Through the arrangement of the above-mentioned gear transmission mechanism, when the movable shaft 11 moves along the axial direction of the developing roller, the cam 13 will rotate around the rotation axis of the developing roller 102. Since the rotation radius of the cam 13 changes along the circumferential direction, the gap between the developing roller 102 and the photosensitive drum 201 changes accordingly during the rotation of the cam 13. Figure 3 As shown in FIG. 1 , when the force receiving portion 111 of the moving shaft 11 receives the separation driving force from the electrophotographic imaging device, the moving shaft 11 will move along the M1 direction; at this time, as shown in FIG. Figure 4 As shown in FIG. 1 , under the action of the gear transmission mechanism, the cam 13 rotates in the direction R1 to a position abutting against the photosensitive drum 201, and is subjected to the reaction force of the photosensitive drum 201, so as to force the developing box to move away from the photosensitive drum 201, thereby increasing the distance between the photosensitive drum 201 and the developing box, thereby separating the developing roller 102 from the photosensitive drum 201 (see FIG. 1 ). Figure 5 ).

[0053] In Embodiment 1, since the cam 13 is provided only on one end side of the developing roller 102, the separation gap between the developing roller 102 and the photosensitive drum 201 is uneven. As a variation of Embodiment 1, a cam may be provided on the other end side of the developing roller 102, and a gear transmission mechanism may be provided between the cam and the moving shaft for transmission connection.

[0054] Furthermore, the developing box may also have an elastic reset member for resetting the movable shaft 11. Figure 1 and 3 As shown, the elastic reset member can be a reset spring 12 sleeved on the moving shaft 11, and the two ends of the reset spring 12 can respectively abut against the force-bearing portion 111 and the box body 101. When the moving shaft 11 receives the separation driving force from the electronic photographic imaging device, the reset spring 12 is compressed (see Figure 3 );like Figure 6 As shown, after the separation driving force applied to the movable shaft 11 by the electronic photographic imaging device is canceled, the elastic restoring force generated by the reset spring 12 will push the movable shaft 11 to move in the direction opposite to M1 and reset, so that the cam 13 rotates to a position allowing the developing roller 102 to contact the photosensitive drum 201.

[0055] In this embodiment, the direction of the force acting on the force receiving portion 111 is parallel to the length direction of the developing roller 102 .

[0056] Example 2

[0057] like Figure 7 and 8 As shown, in Embodiment 2, a developing roller 102 and a movable shaft 21 are provided on the box body 101 of the developing box. The movable shaft 21 is configured to extend and move along the length direction of the developing roller 102, and one end of the movable shaft 21 is provided with a force receiving portion 211 for receiving the separation driving force.

[0058] Cams 22 are provided on both opposite end sides of the developing roller 102; preferably, the rotation axis of the cam 22 is arranged to coincide with the rotation axis of the developing roller 102. In Embodiment 2, the cam 22 is rotatably mounted on the roller shaft of the developing roller 102. As a variation of Embodiment 2, the cam 22 may also be rotatably mounted on the box body 101 or the end covers on both sides of the box body 101. In addition, the cam 22 may also be arranged only on one end side of the developing roller 102.

[0059] Furthermore, a transmission mechanism is provided between the moving shaft 21 and the cam 22. When the moving shaft 21 is subjected to the separation driving force and moves in the length direction of the developing roller 102, the cam 22 is driven to rotate by the transmission mechanism, so that the developing roller 102 is separated from the photosensitive drum. The first end cover 104 and the second end cover 105 are provided at opposite ends of the box body 101, at least partially covering the transmission mechanism.

[0060] like Figure 8 , 10 As shown in Figures 11 and 12, in Embodiment 2, the transmission mechanism includes a first rotating member 23 and a second rotating member 24 connected to the cam 22. The first rotating member 23 is sleeved on the moving shaft 21, and the second rotating member 24 is connected to the cam 22 and the rotation axes of the two coincide. The first rotating member 23 and the second rotating member 24 are connected to each other through a transmission belt 25. The cam 22 and the second rotating member 24 can be connected in one piece or in a split assembly connection. The specific connection structure of the two is not limited, as long as the cam 22 can rotate with the second rotating member 24.

[0061] Furthermore, if Figure 10-11 As shown, the moving shaft 21 is provided with a first thread 212, and the inner peripheral wall of the first rotating member 23 is provided with a second thread 231. Through the thread cooperation between the first thread 212 and the second thread 231, when the moving shaft 21 moves, the first rotating member 23 will rotate accordingly; accordingly, the cam 22 connected to the second rotating member 24 will rotate.

[0062] By setting the above transmission mechanism, when the moving shaft 21 moves along the length direction of the developing roller, the cam 22 will rotate around the rotation axis of the developing roller 102. Fig. 9 As shown, when the force receiving portion 211 of the movable shaft 21 receives the separation driving force from the electrophotographic imaging device, the movable shaft 21 will move in the M2 direction, so that the cam 22 rotates in the R2 direction; Fig.12 As shown, the cam 22 rotates to a position abutting the photosensitive drum 201 and receives a reaction force from the photosensitive drum 201 to force the developing box to move away from the photosensitive drum 201, thereby increasing the distance between the photosensitive drum 201 and the developing box, and separating the developing roller 102 from the photosensitive drum 201.

[0063] Furthermore, the developing box may also have an elastic reset member for resetting the movable shaft 21. Figure 7 and 10 As shown, the elastic reset member can be a reset spring 26 sleeved on the moving shaft 21. When the moving shaft 21 receives the separation driving force from the electrophotographic imaging device, the reset spring 22 is compressed (see Fig. 9 and 10 ).like Fig.13 As shown, in the electronic photographic imaging device, after the separation driving force applied to the movable shaft 21 is canceled, the elastic restoring force generated by the reset spring 22 will push the movable shaft 21 to move in the direction opposite to M2 and reset, so that the cam 22 returns to the position allowing the developing roller 102 to contact the photosensitive drum 201.

[0064] Example 3

[0065] like Fig.14 and 15 As shown, in Embodiment 3, a developing roller 102 and a moving shaft 31 are provided on the box body 101 of the developing box, and the moving shaft 31 extends and moves along the length direction of the developing roller 102, and the moving shaft 31 has a force-bearing portion 311 located at the first end side of the box body, and the force-bearing portion 311 is used to receive the separation driving force. In this embodiment, the driving member is a lever, and the lever includes at least one of a first lever 33 and a second lever 32. In the length direction of the developing roller 102, the first lever 33 and the second lever 32 are provided at opposite ends of the box body 101, respectively, the first lever 33 is provided at the first end side of the box body 101, and the second lever 32 is provided at the second end side of the box body 101 relative to the first end side, and the box body 101 may be provided with a first cover plate 107 that at least partially covers the first lever 33 and a second cover plate 106 that at least partially covers the second lever 32. In a variant embodiment, the first lever 33 and the second lever 32 may be provided selectively.

[0066] The first lever 33 and the second lever 32 can both rotate in response to the movement of the movable shaft 31 to apply a force to the photosensitive drum, thereby causing the developing box to move to a position where the developing roller 102 is separated from the photosensitive drum. In the embodiment, the first lever 33 rotates with the box body 101, for example, rotating around a first fulcrum 331 on the box body 101. Furthermore, a connecting rod 34 is provided between the first lever 33 and the movable shaft 31, and when the movable shaft 31 moves, the first lever 33 is driven to rotate through the connecting rod 34.

[0067] In the embodiment, the connecting rod 34 is rotationally matched with the box body 101, for example, it rotates around the third fulcrum 341 on the box body 101; the two ends of the connecting rod 34 are respectively rotationally matched with the first lever 33 and the movable shaft 31, and one end of the first lever 33 relative to the connecting rod 34 is a free end for abutting the photosensitive drum. As a variant embodiment, the first lever 33 can be rotationally matched with the box body 101 and rotationally matched with the connecting rod 34; the connecting rod 34 can be rotationally matched with the box body 101 and rotationally matched with the movable shaft 31.

[0068] In the embodiment, the second lever 32 is rotationally matched with the box body 101, for example, it rotates around the second fulcrum 321 on the box body 101; one end of the second lever 32 is rotationally matched with the movable shaft 31, and the other end of the second lever 32 is a free end for abutting the photosensitive drum. As a variant embodiment, the second lever 32 can be rotationally matched with the box body 101 and rotationally matched with the movable shaft 31.

[0069] In the embodiment, the first lever 33 and the second lever 32 can rotate to a position where the developing roller 102 is separated from the photosensitive drum in response to the movement of the moving shaft 31. Fig.16 The shown orientation is for reference. When the force-bearing portion 311 of the movable shaft 31 receives the separation driving force from the electronic photographic imaging device, the movable shaft 31 will move in the direction of M3, the first lever 33 will rotate clockwise around the first fulcrum 331, and the second lever 32 will rotate counterclockwise around the first fulcrum 321 (that is, the rotation directions of the first lever 33 and the second lever 32 are opposite), and the free ends of the first lever 33 and the second lever 32 move toward the direction close to the photosensitive drum 201 to apply forces to the opposite ends of the photosensitive drum 201 respectively. The reaction force of the photosensitive drum 201 will force the developing box to move away from the photosensitive drum 201, thereby moving the developing roller 102 away from the photosensitive drum 201.

[0070] Furthermore, the developing box may also have an elastic reset member for resetting the movable shaft 31, and the elastic reset member may be a reset spring. Fig.14As shown, the elastic reset member can be a reset spring 35 sleeved on the movable shaft 31, and the two ends of the reset spring 35 can respectively abut against the box body 101 and the force-bearing part 311 of the movable shaft 31. When the movable shaft 31 receives the separation driving force from the electronic photographic imaging device, the reset spring 35 is compressed (see Fig.16 ).like Fig.18 and 19 As shown, when the separation driving force applied to the force-bearing part 311 by the electronic photographic imaging device is cancelled, the elastic restoring force generated by the reset spring 35 will push the movable shaft 31 to move in the direction opposite to M3 and reset, so that the first lever 33 and the second lever 34 rotate to allow the developing box to move to a position where the developing roller 102 contacts the photosensitive drum 201.

[0071] In Embodiment 3, when the developing roller 102 contacts and separates from the photosensitive drum 201, the free end of the first lever 33 can contact the end of the photosensitive drum 201 to limit the rotational freedom of the first lever 33, so that the first lever 33 rotates in a desired direction. However, when the separation driving force applied to the force receiving portion 311 by the electrophotographic imaging device is cancelled, the contact force between the first lever 33 and the photosensitive drum 201 is not sufficient to separate the developing roller 102 from the photosensitive drum 201.

[0072] Example 4

[0073] In this embodiment, the driving member is an elastic tube. Figure 20-21 As shown, the developing box of Example 4 includes a box body 101, a developing roller 102, a first movable shaft 41, a second movable shaft 42 and two elastic tube bodies 43; wherein the first movable shaft 41 and the second movable shaft 42 are both configured to extend and move along the length direction of the developing roller 102, and the first movable shaft 41 is located at one end of the box body 101 and is provided with a force-bearing portion 411 for receiving a separation driving force, a gear transmission mechanism is provided between the first movable shaft 41 and the second movable shaft 42, and the box body 101 is provided with a cover plate 108 covering the gear transmission mechanism.

[0074] Specifically, the gear transmission mechanism includes a first gear 44, a second gear 45 and a rack 46, the moving shaft 41 is provided with a first rack portion 412, the second moving shaft 42 is provided with a second rack portion 421, the first gear 44 is meshed with the first rack portion 412 and the rack 46, and the second gear 45 is meshed with the second rack portion 421 and the rack 46. In this way, when the force receiving portion 411 of the first moving shaft 41 receives the separation driving force from the electrophotographic imaging device, the first moving shaft 41 and the second moving shaft 42 can both move along the length direction of the developing roller 102.

[0075] In the embodiment, the elastic tube body 43 is configured to be able to produce elastic deformation in its axial direction (the length direction of the developing roller 102) and radial direction, and the two elastic tube bodies 43 can be squeezed by the first movable shaft 41 and the second movable shaft 42 in the axial direction and expand toward the radial outside. The elastic tube body 43 can be a rubber tube body, but is not limited thereto, and can also be a silicone tube body, for example.

[0076] Specifically, the two elastic tube bodies 43 are respectively a first elastic tube body 43a that can be squeezed by the first movable shaft 41 and a second elastic tube body 43b that can be squeezed by the second movable shaft 42. Preferably, along the length direction of the developing roller 102, the first elastic tube body 43a and the second elastic tube body 43b are respectively located at opposite ends of the box body 101. As a variation, the developing box may only have the first elastic tube body 43a sleeved on the first movable shaft 41; that is, the developing box may not have the second movable shaft 42.

[0077] As an optional implementation, Fig.21 As shown, the first elastic tube 43a can be sleeved on the movable shaft 41, and its axial ends can respectively abut against the force-bearing portion 411 and the box body 101; as an optional embodiment, as Fig. 22 and 23 As shown, a first supporting pin 1011 is disposed on the box body 101 , a second supporting pin 422 is disposed at the corresponding end of the second movable shaft 42 , and the second elastic tube 43 is sleeved on the first supporting pin 1011 and the second supporting pin 422 .

[0078] like Fig.23 and 24 As shown, when the force-bearing portion 411 of the first movable shaft 41 receives the separation driving force from the electronic photographic imaging device, the first movable shaft 41 and the second movable shaft 42 both move along the M4 direction; during this process, the first movable shaft 41 and the second movable shaft 42 respectively squeeze the first elastic tube body 43a and the second elastic tube body 43b, so that the first elastic tube body 43a and the second elastic tube body 43b are compressed in the axial direction and expand toward the radial outside, thereby forming an expansion portion 431 with an increased size in the radial direction.

[0079] like Fig.25 As shown, the electronic photographic imaging device has a component 301 that abuts against the expansion portion 431. When the expansion portion 431 abuts against the component 301, the component 301 applies a reaction force F4 to the developing box, forcing the developing box to move away from the photosensitive drum 201, thereby separating the developing roller 102 from the photosensitive drum 203. Fig.26As shown, when the separation driving force applied to the force-bearing part 411 by the electronic photographic imaging device is cancelled, the elastic restoring force generated by the elastic tube body 43 will reset the first movable shaft 41 and the second movable shaft 42, thereby allowing the developing box to move to the position where the developing roller 102 contacts the photosensitive drum 201.

[0080] Embodiment 5

[0081] The second aspect of the present application discloses a processing box, which includes a photosensitive drum box having a photosensitive drum and a developing box disclosed in any of the above embodiments, and a movable connection is formed between the developing box and the photosensitive drum box. Further, in the embodiment, an elastic mechanism may be provided between the developing box and the photosensitive drum box, and the elastic mechanism is used to apply an elastic force to the developing box, and when the separation driving force applied to the developing box by the electronic photographic imaging device is cancelled, the elastic force applied by the elastic mechanism can make the developing box move to the position where the developing roller contacts the photosensitive drum.

[0082] In the present application, the developing box may also be provided with a rotational driving force receiving member, which is used to receive the rotational driving force from the electronic photographic imaging device to drive the developing roller to rotate. The rotational driving force receiving member and the force receiving portion of the moving shaft receiving the separation driving force may be located on the same end side of the box body, or may be located on two opposite end sides of the box body, and the present application does not limit this.

[0083] Although the present invention is described above through embodiments, it should be understood that the above embodiments are only used to exemplarily describe the feasible implementation methods of the present invention, and should not be interpreted as limiting the scope of protection of the present invention. That is, any replacement or change made by those skilled in the art in accordance with the present invention should also be covered by the scope of protection of the claims of the present invention.

Claims

1. A developing box, comprising: Box body; A developing roller, used for supplying developer to the photosensitive drum; wherein the developing box further comprises: A movable shaft, arranged on the box body and capable of moving along the length direction of the developing roller, one end of the movable shaft being provided with a force receiving portion for receiving a separation driving force; a driving member disposed on an end side of the developing cartridge, the driving member being movable in response to movement of the movable shaft; The transmission mechanism is arranged between the moving shaft and the driving member. When the moving shaft moves, the driving member can be driven to move through the transmission mechanism.

2. The developing cartridge according to claim 1, characterized in that: In the length direction of the developing roller, the force receiving portion is located at one end of the developing box, and the driving member is located at the other end of the developing box.

3. The developing cartridge according to claim 1, characterized in that: The driving member is a cam, and the cam is rotatably arranged on at least one end side of the developing roller; wherein the transmission mechanism is provided between the moving shaft and the cam, and when the moving shaft moves, the cam can be driven to rotate through the transmission mechanism.

4. The developing cartridge according to claim 3, characterized in that: The transmission mechanism is a gear transmission mechanism, and the gear transmission mechanism includes a first gear, a second gear, a rack and a third gear, the rotation axes of the first gear and the second gear are perpendicular to each other, and the rotation axes of the third gear and the second gear are parallel to each other; The first gear has a first cylindrical gear portion and a first bevel gear portion, the second gear has a second cylindrical gear portion and a second bevel gear portion, the first cylindrical gear portion is meshed with the rack portion on the movable shaft, the first bevel gear portion is meshed with the second bevel gear portion, the second cylindrical gear portion and the third gear are both meshed with the rack; the third gear is connected to the cam and the rotation axes of the two coincide.

5. The developing cartridge according to claim 3, characterized in that: The transmission mechanism includes a first rotating member, a second rotating member and a transmission belt. The first rotating member is sleeved on the movable shaft. The second rotating member is connected to the cam and the rotation axes of the two coincide. The first rotating member and the second rotating member are connected through the transmission belt. The movable shaft is provided with a first thread, and the inner circumferential wall of the first rotating member is provided with a second thread that cooperates with the first thread.

6. The developing cartridge according to claim 1, characterized in that: The driving member is a lever, which is rotatably disposed on at least one end side of the box body; wherein the lever can rotate in response to the movement of the moving shaft.

7. The developing cartridge according to claim 6, wherein: The movable shaft has a force-bearing portion located on the first end side of the box body, and the lever includes a first lever and a second lever, the first lever is arranged on the first end side of the box body, and the second lever is arranged on the second end side of the box body relative to the first end side.

8. The developing cartridge according to claim 7, wherein: A connecting rod is provided between the first lever and the movable shaft, the connecting rod is rotationally matched with the box body, and the two ends of the connecting rod are rotationally and slidingly matched with the first lever and the movable shaft respectively; the second lever is rotationally and slidingly matched with the movable shaft.

9. The developing cartridge according to any one of claims 1 to 8, characterized in that: The developing box also includes an elastic reset member for resetting the movable shaft.

10. The developing cartridge according to claim 9, characterized in that: The developing box can be detachably installed in a photosensitive drum box provided with a photosensitive drum, and the developing roller and the photosensitive drum can move between mutually contacting and separated positions; when the driving member moves in response to the movement of the moving shaft, the driving member can abut against the photosensitive drum; the force applied to the force-bearing part is parallel to the length direction of the developing roller.

Images