Developing cartridge

Abstract

The developing cartridge according to the present invention is detachably mounted to a drum cartridge, the drum cartridge is detachably mounted to an electrophotographic image forming apparatus provided with a force applying member, the developing cartridge includes a first cartridge body and a developing roller, and the drum cartridge includes a second cartridge body and a photosensitive drum; the developing roller and the photosensitive drum can be switched between a mutual contact state and a mutual separation state, in the mutual contact state, the developing box performs imaging, and in the mutual separation state, the developing box does not perform imaging; the developing cartridge further comprises a separating member, one longitudinal end part of the developing cartridge directly or indirectly receives the force applied by the force applying member through the separating member, and the other longitudinal end part does not directly receive the force applied by the force applying member, so that the developing roller and the photosensitive drum are forced to be converted into a mutually separated state from a mutually contacted state; the developing roller and the photosensitive drum are separated from each other at the two longitudinal ends of the developing box in the longitudinal direction of the developing box, the structure of the developing box can be simplified, and the developing roller and the photosensitive drum can be prevented from being damaged.

Description

[0001] The present invention claims an application date of 2023.10.19, an application number of 202322821160.X, an invention name of “Developer Box”, an application date of 2023.11.14, an application number of 202323073548.2, an invention name of “Developer Box”, an application date of 2023.12.05, an application number of 202323314191.2, an invention name of “Developer Box”, an application date of 2024.01.12, The present invention claims priority of the prior Chinese application with application number 202420091801.2, invention name “Developer Box”, application date 2024.07.30, application number 202421823793.2, invention name “Developer Box”, and application date 2024.08.15, application number 202421983858.X, invention name “Developer Box”, all contents of which are cross-referenced in this application. Technical Field

[0002] The invention relates to the field of electronic photographic imaging, and in particular to a developing box for being detachably installed in an electronic photographic imaging device. Background Art

[0003] There is a split processing box, which includes a developing box and a drum box that are detachably connected. The developing box includes a first box body and a developing roller rotatably arranged in the first box body, and the drum box includes a second box body and a photosensitive drum rotatably arranged in the second box body. The developing roller is in contact with the photosensitive drum and is used to supply the developer stored in the developing box to the photosensitive drum. After the developer in the developing box is used up, a new developing box is replaced. When the components in the drum box have not reached their service life, there is no need to replace the drum box.

[0004] Because the photosensitive drum or the developing roller is easily damaged when the developing roller and the photosensitive drum are in contact for a long time without performing imaging work, the processing box needs to be provided with a separation member to keep the developing roller and the photosensitive drum separated from each other when not performing imaging work and to contact each other when performing imaging work. When the processing box is not performing imaging work (such as cleaning the photosensitive drum), the force applying member provided in the electronic photographic imaging device needs to apply a force to the separation member to separate the developing roller and the photosensitive drum, so that the developing roller and the photosensitive drum are completely separated. Summary of the invention

[0005] The present invention provides a developing box, which further develops the existing technology, so that the developing roller and the photosensitive drum can be effectively separated when the processing box is not performing imaging work. The specific scheme is as follows:

[0006] A developing box is detachably mounted to a drum box, and the drum box is detachably mounted to an electronic photographic imaging device provided with a force-applying member, wherein the developing box comprises a first box body and a developing roller rotatably arranged in the first box body, and the drum box comprises a second box body and a photosensitive drum rotatably arranged in the second box body; the developing roller and the photosensitive drum are capable of switching between a state of mutual contact and a state of mutual separation, in which the developing box performs imaging, and in which the developing box does not perform imaging in the state of mutual separation; the developing box also comprises a separation member, which is configured so that one longitudinal end of the developing box directly or indirectly receives the force applied by the force-applying member through the separation member, and the other longitudinal end does not directly receive the force applied by the force-applying member, thereby forcing the developing roller and the photosensitive drum to switch from the state of mutual contact to a state of mutual separation; along the longitudinal direction of the developing box, at the two longitudinal ends of the developing box, the developing roller and the photosensitive drum are separated from each other.

[0007] Specifically, after receiving the force applied by the force applying member, the separation member contacts the drum box or components in the imaging device, so that the first box body moves in a direction away from the photosensitive drum, and the developing roller and the photosensitive drum are separated from each other.

[0008] In some embodiments, the separation member is disposed on the first box body, and the separation member includes a force receiving member and a force applying portion; the force receiving member is disposed at a longitudinal end of the developing box, for contacting the force applying member, and moving relative to the photosensitive drum under the action of the force applying member; the force applying portion includes a first force applying portion disposed at the one longitudinal end and a second force applying portion disposed at the other longitudinal end, and the first force applying portion and the second force applying portion move relative to the photosensitive drum in response to the movement of the force receiving member.

[0009] In some embodiments, the force-applying member also includes a connecting portion extending between two longitudinal ends of the developing box, and the first force-applying portion and the second force-applying portion are respectively arranged at both ends of the connecting portion, and the first force-applying portion transfers the force received by the force receiving member to the second force-applying portion through the connecting portion; the first force-applying portion and the second force-applying portion both abut against the second box body, so that the developing roller and the photosensitive drum are separated from each other.

[0010] In some embodiments, the force receiving member and the connecting part are separately arranged, the force receiving member includes a force receiving portion, an active portion and a guiding portion, and a driven portion is arranged on the connecting portion; the force receiving portion is used to abut against the force-applying component to receive force, the guiding portion is used to guide the movement of the force receiving member, and the active portion is used to drive the driven portion.

[0011] In some embodiments, the force receiving member and the connecting portion are integrally provided, the force receiving member having a force receiving portion for receiving the force applied by the force applying member, the first force applying portion and the force receiving portion are provided at the same end of the developing box, and an angle is formed therebetween.

[0012] In some embodiments, the force receiving member and the connecting portion are separately provided, and the force receiving member is provided to rotate around an axis parallel to a longitudinal direction of the developing cartridge.

[0013] In some embodiments, when the first force applying portion receives the force applied by the force applying member, the developing box as a whole moves in the longitudinal direction, the developing box moves relative to the photosensitive drum, and the developing roller and the photosensitive drum are separated from each other.

[0014] In some embodiments, the drum cartridge further comprises a first support member and a second support member disposed on the second cartridge body, and the photosensitive drum is supported by the first support member and the second support member;

[0015] When the first force applying portion receives the force applied by the force applying member, the second force applying portion comes into contact with the first supporting member.

[0016] In some embodiments, the second force applying portion is provided with an extrusion surface, and the extrusion surface is configured such that a distance between the extrusion surface and the rotation axis of the developing roller in a direction perpendicular to the rotation axis gradually decreases from the one longitudinal end portion to the other longitudinal end portion.

[0017] In some embodiments, the imaging device further comprises a guide rail for guiding the installation or removal of the developing box, and the second force applying portion abuts against the guide rail to move the developing box relative to the photosensitive drum, so that the developing roller and the photosensitive drum are separated from each other.

[0018] In some embodiments, the separation member includes a main body, a force receiving member and a force applying member; the main body is fixedly arranged relative to the first box body; the force receiving member is connected to the main body, and is used to receive the force applied by the force applying member; the force applying member is connected to the main body, and through the force applying member, the force is applied to the force receiving member outside the developing box, and then the force receiving member reacts to the force applying member, so that the first box body moves relative to the photosensitive drum, and the developing roller and the photosensitive drum are separated from each other.

[0019] In some embodiments, the developing box further includes a range-extending member for abutting against an acting portion outside the developing box, and the range-extending member and the separating member are arranged on different sides along the longitudinal direction of the developing box.

[0020] In some embodiments, the drum box is provided with a first part, a second part and a third part, wherein the first part and the second part are both connected to the third part, the first part is used to receive the force applied by the force-applying member, so that the box side force-applying member rotates around the third part along the direction r2, and the second part is used to transmit the force to the separation member; the second part includes a first side edge, a second side edge and a third side edge, wherein the two ends of the second side edge are respectively connected to the first side edge and the third side edge, the first side edge intersects with the second side edge at a first intersection D1, the second side edge intersects with the third side edge at a second intersection D2, and along the rotation direction r2, the first intersection D1 is located downstream of the second intersection D2; when the developing roller and the photosensitive drum are in a state of contact with each other, the part of the force receiving member for receiving the force is opposite to the first intersection D1; when the developing roller and the photosensitive drum are in a state of separation from each other, the part of the force receiving member for receiving the force is opposite to the second intersection D2.

[0021] In some embodiments, the drum box is provided with a first part, a second part and a third part, wherein the first part and the second part are both connected to the third part, the first part is used to receive the force applied by the force applying member, so that the box side force applying member rotates around the third part along the direction r2, and the second part is used to transmit the force to the separation member; the second part includes a first side edge, a second side edge and a third side edge, wherein the two ends of the second side edge are respectively connected to the first side edge and the third side edge, the first side edge intersects with the second side edge at a first intersection D1, the second side edge intersects with the third side edge at a second intersection D2, and along the rotation direction r2, the first intersection D1 is located downstream of the second intersection D2; when the developing roller and the photosensitive drum are respectively in a state of being close to each other and a state of being separated from each other, the parts of the force receiving member for receiving the force are respectively opposite to two different positions of the second side edge, and the two different positions are located between the first intersection D1 and the second intersection D2.

[0022] In some embodiments, the separation member includes a first surface, a second surface and a third surface, wherein the third surface is located between the first surface and the second surface, and along the longitudinal direction of the developing box, the second surface is farther away from the first box body than at least a portion of the first surface; when the developing roller and the photosensitive drum are in a state of contact with each other, along the longitudinal direction of the developing box, the force member is opposite to the first surface; when the developing roller and the photosensitive drum are in a state of separation from each other, along the longitudinal direction of the developing box, the force member is opposite to the second surface, and the end face of the force member abuts against the second surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of a processing box having a developing box involved in Example 1 of the present invention.

[0024] Figure 2It is a schematic diagram of the side structure of a processing box having a developing box involved in Example 1 of the present invention.

[0025] Figure 3 It is a schematic diagram of the lateral structure of the processing box having the developing box involved in Example 1 of the present invention in another direction.

[0026] Figure 4 It is a schematic cross-sectional view of a process box according to Embodiment 1 of the present invention.

[0027] Figure 5 It is a schematic diagram of the structure of the drum box involved in Example 1 of the present invention.

[0028] Figure 6 It is a schematic diagram of the decomposition of the separation component of the developing box involved in Example 1 of the present invention after being separated from the first box body.

[0029] Figure 7 It is a schematic structural diagram of a processing box having a developing box involved in Example 2 of the present invention.

[0030] Figure 8 It is a schematic diagram of the side structure of a processing box having a developing box involved in Example 2 of the present invention.

[0031] Fig. 9 It is a schematic cross-sectional structure diagram of a processing box having a developing box involved in Example 2 of the present invention.

[0032] Fig.10 It is a schematic structural diagram of a connecting rod in a developing box involved in Embodiment 2 of the present invention.

[0033] Fig.11 This is a state diagram after the developer box and the drum box involved in Example 3 of the present invention are separated.

[0034] Fig. 12A It is a three-dimensional diagram of the developing box involved in Example 3 of the present invention.

[0035] Fig. 12B It is a stereoscopic view of a driving force transmission assembly in a developer box according to Embodiment 3 of the present invention.

[0036] Fig.13 This is a side view of the developing box involved in Example 3 of the present invention observed along the longitudinal direction.

[0037] Fig.14 It is a side view of a process box having a developing box according to Embodiment 3 of the present invention as viewed in the longitudinal direction.

[0038] Fig.15 It is a three-dimensional diagram of the developing box involved in Example 4 of the present invention.

[0039] Fig.16It is a side view of the developing roller and the photosensitive drum in the developing box involved in Example 4 of the present invention when they are separated from each other.

[0040] Fig.17 It is a schematic diagram of the decomposition of the separation component of the developing box involved in Example 4 of the present invention after being separated from the first box body.

[0041] Fig.18 It is a schematic diagram of the state of the second longitudinal end portion of the developing box when the developing roller and the photosensitive drum in the developing box involved in Example 4 of the present invention are separated from each other.

[0042] Fig.19 It is a three-dimensional view of the first longitudinal end portion of the developing box involved in Example 5 of the present invention.

[0043] Fig. 20 It is a schematic diagram of the state of the first longitudinal end portion of the developing box when the developing roller and the photosensitive drum in the developing box involved in Example 5 of the present invention are separated from each other.

[0044] Fig.21 It is a schematic diagram of the state of the second longitudinal end portion of the developing box when the developing roller and the photosensitive drum in the developing box involved in Example 5 of the present invention are separated from each other.

[0045] Fig.22A and Fig. 22B It is a perspective view of the drum cartridge according to the present invention.

[0046] Fig.23 It is a three-dimensional view of the end where the second force applying portion of the developing box involved in Example 6 of the present invention is located.

[0047] Fig.24 It is a stereoscopic view showing the developing box in a first state when the developing box involved in Embodiment 6 of the present invention is installed to the drum box.

[0048] Fig.25 It is a stereoscopic view showing the developing box in the second state when the developing box involved in Embodiment 6 of the present invention is installed to the drum box.

[0049] Fig.26 It is a three-dimensional view of the developing roller and the photosensitive drum in the developing box involved in Example 7 of the present invention when they are separated from each other.

[0050] Fig.27A It is a stereoscopic view of the end where the second force applying portion is located when the developing roller and the photosensitive drum in the developing box involved in Example 8 of the present invention are in a state of being close to each other.

[0051] Fig.27B It is a stereoscopic view of the end where the second force applying portion is located when the developing roller and the photosensitive drum in the developing box involved in Example 8 of the present invention are in a state of being separated from each other.

[0052] Fig.28 It is a three-dimensional diagram of the developing box involved in Example 9 of the present invention.

[0053] Fig.29A It is a stereoscopic view of the end where the second force applying portion is located when the developing roller and the photosensitive drum in the developing box involved in Example 9 of the present invention are in a state of being close to each other.

[0054] Fig.29B It is a stereoscopic view of the end where the second force applying portion is located when the developing roller and the photosensitive drum in the developing box involved in Example 9 of the present invention are in a state of being separated from each other.

[0055] Fig.30 It is a three-dimensional diagram of the developing box involved in Example 10 of the present invention.

[0056] Fig.31 It is a partial stereoscopic view of the developing roller and the photosensitive drum when the developing box involved in Example 10 of the present invention is installed in the drum box and approaches each other.

[0057] Fig.32A It is a plan view of the developing roller and the photosensitive drum when the developing cartridge according to Embodiment 10 of the present invention is mounted on the drum cartridge and when the developing roller and the photosensitive drum are close to each other.

[0058] Fig.32B It is a plan view of a state where the developing roller and the photosensitive drum are separated from each other after the developing cartridge according to Embodiment 10 of the present invention is installed in the drum cartridge.

[0059] Fig.33 It is a simplified diagram of the change in the angle between the rotation axis of the developing roller and the rotation axis of the photosensitive drum when the developing roller and the photosensitive drum are separated from each other in the developing box involved in Example 10 of the present invention.

[0060] Fig.34 It is a partial stereoscopic view of the developing roller and the photosensitive drum separated from each other after the developing box involved in Example 11 of the present invention is installed in the drum box.

[0061] Fig.35 It is a three-dimensional diagram of the developing roller and the photosensitive drum separated from each other after the developing box involved in Example 12 of the present invention is installed in the drum box.

[0062] Fig.36 It is a three-dimensional diagram of the developing box involved in Example 13 of the present invention.

[0063] Fig.37 This is a side view of the developing box involved in Example 13 of the present invention observed along the longitudinal direction.

[0064] Fig.38A This is a side view observed along the longitudinal direction when the developing roller in the developing box involved in Example 13 of the present invention and the photosensitive drum in the drum box are close to each other.

[0065] Fig.38BThis is a side view observed along the longitudinal direction when the developing roller in the developing box involved in Example 13 of the present invention and the photosensitive drum in the drum box are separated from each other.

[0066] Fig.39 It is a schematic diagram of the non-driving end of the developing box involved in Example 14 of the present invention.

[0067] Fig.40A This is a side view observed along the longitudinal direction when the developing roller in the developing box involved in Example 14 of the present invention and the photosensitive drum in the drum box are close to each other.

[0068] Fig.40B This is a side view observed along the longitudinal direction when the developing roller in the developing box involved in Example 14 of the present invention and the photosensitive drum in the drum box are separated from each other.

[0069] Fig.41 This is a three-dimensional view of the developing box involved in Example 14 of the present invention observed from bottom to top.

[0070] Fig.42 It is a schematic diagram of the non-driving end of the developing box involved in Example 15 of the present invention.

[0071] Fig.43A It is a side view observed along the vertical direction when the developing roller in the developing box involved in Example 15 of the present invention and the photosensitive drum in the drum box are close to each other.

[0072] Fig.43B This is a side view observed along the vertical direction when the developing roller in the developing box and the photosensitive drum in the drum box involved in Example 15 of the present invention are separated from each other. DETAILED DESCRIPTION

[0073] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but it is easy for those skilled in the art to understand that the present invention can also be implemented in other ways different from those described herein. Therefore, other possible implementation methods that can be known by those skilled in the art based on the embodiments described in this application all belong to the protection scope of this application.

[0074] In the present invention, the imaging material box includes a processing box and an ink cartridge, as shown in the specific embodiment.

[0075] Example 1

[0076] like Figures 1 to 4As shown, the processing box 100 includes a developing box 11 and a drum box 12, and the developing box 11 can be installed on the drum box 12 and can be removed from the drum box 12. In actual use, the developing box 11 can be installed in the electronic photographic imaging device together with the drum box 12, and can be removed from the electronic photographic imaging device together. When the developing box 11 is installed on the drum box 12, the developing roller and the photosensitive drum are parallel to each other and face each other. After the developer contained in the developing box 11 is used up, the developing box 11 can be removed from the drum box 12 and replaced with a new one. When the service life of the photosensitive drum or other components installed in the drum box 12 is reached, a new drum box 12 can also be replaced. The drum box 12 includes a second box body 121 and a photosensitive drum 14, and the developing box 11 includes a first box body 111, a separation member 13, a developing roller 15, a powder feeding roller 16 and a stirring mechanism 17. The first box body 111 has a developer accommodating portion for accommodating a developer, the stirring member 17 is arranged in the developer accommodating portion for stirring the developer, the powder feeding roller 16 is used to transport the developer toward the developing roller 15, and the developing roller 15 is used to carry the developer.

[0077] like Figure 5 As shown, the drum box 12 includes a photosensitive drum 14 and a second box body 121, wherein the photosensitive drum 14 is rotatably mounted on the second box body 121, and the longitudinal ends of the second box body 121 are respectively provided with a first abutting portion 1211 and a second abutting portion 1212, and the first abutting portion 1211 and the second abutting portion 1212 are used to abut against the separation member 13 of the developer box 11, so that when the separation member 13 receives the force applied by the electronic photographic imaging device, the developing roller 15 is separated from the photosensitive drum 14. The forced pushing member 123 is arranged at the two longitudinal ends of the second box body 121, and the second box body 121 is also provided with an elastic mechanism 122 for applying elastic force to the forced pushing member 123, which is shown as a spring in the figure, and it can be understood that other structures for applying elastic force can be adopted. The free end of the forced pushing member 123 is used to abut against the first box body 111 of the developer box 11, and apply a pushing force to the first box body 111 to make the developing roller 15 contact with the photosensitive drum 14. In some embodiments, at least one portion of the pushing member 123 is made of a conductive material, which can receive power from the electronic photographic imaging device and supply it to the developing box 11. A guiding and positioning structure can also be provided on the second box body 121 to guide the installation of the developing box 11 to the drum box 12. When the developing box 11 is installed to the drum box 12, it is installed to the drum box 12 along the installation direction in a manner that the developing roller 15 is located at the front side. When installed in place, the developing roller 15 contacts the photosensitive drum 14.

[0078] like Figure 6As shown, the separation member 13 is arranged on the first box body 111, preferably on the upper side of the first box body 111, so as to facilitate the installation of the separation member 13. The separation member 13 includes a force receiving member 131, a connecting rod 132 and a force applying portion, the connecting rod 132 extends from the first longitudinal end of the developing box to the second longitudinal end, the force receiving member 131 can receive the force from the electronic photographic imaging device and move, the force applying portion moves in response to the movement of the force receiving member 131 / force receiving portion 1311 relative to the drum box 12 / the second box body 121 / the photosensitive drum 14, the developing roller 15 and the photosensitive drum 14 are separated from each other, and the connecting rod 132 can be driven directly or indirectly by the force applying portion.

[0079] Specifically, the separation member 13 includes a force receiving member 131 disposed at the first longitudinal end of the developing box and a connecting rod 132 connected to the force receiving member 131 through a gear rack mechanism. The connecting rod 132 can be disposed in a recess 1111 (such as Figure 4 The connecting rod 132 is arranged in the first box body 111 and extends in the longitudinal direction of the developing box 11, and extends from the first longitudinal end to the second longitudinal end of the developing box 11. It can be understood that the connecting rod 132 can also be installed on the first box body 111 in other ways. The first force applying portion 1321 and the second force applying portion 1326 are fixedly arranged on the connecting rod 132, and are respectively arranged at the first longitudinal end and the second longitudinal end of the developing box 11.

[0080] The force receiving member 131 includes a force receiving portion 1311, a rack portion (an embodiment of an active portion) 1312, and a guide portion 1313, wherein the force receiving portion 1311 is used to communicate with a force applying member 1 (such as a toothed portion) in an electronic photographic imaging device. Figure 2The rack portion 1312 is fixedly connected to the force receiving portion 1311 and is used to mesh with the gear portion (an embodiment of the driven portion) 1322 on the connecting rod 132. The rack portion 1312 can move with the movement of the force receiving portion 1311. The guide portion 1313 partially extends into the guide channel 1112 provided on the first box body 111. It can be understood that the guide channel can also be provided on the force receiving member 131 and the guide portion cooperating with the guide channel can be provided on the first box body 111. In some embodiments, for example, when the developing box 11 includes an end cover, a guide channel / guide portion for guiding the force receiving member 131 can also be provided on the end cover. Along the direction from the first longitudinal end to the second longitudinal end, the connecting rod 132 is provided with a first force applying portion 1321, a gear portion 1322, a limiting portion 1323, 1325 and a second force applying portion 1326 as a first limiting structure, and a rod body 1324 as a connecting portion is fixedly connected or integrally formed with each part. The first force-applying portion 1321 and the second force-applying portion 1326 are both configured as cam-shaped structures, the center of the large-radius arc portion of which is located at the center position of the rod body 1324, and the small-radius arc portion extends outward away from the rod body 1324. It can be understood that the first force-applying portion 1321 and the second force-applying portion 1326 may be different from the structure shown in the figure, as long as they protrude radially outward relative to the rod body 1324 and can contact the first abutment portion 1211 and the second abutment portion 1212 of the drum box 12. The limiting parts 1323 and 1325 cooperate with the second limiting structure provided on the first box body 111 to limit the longitudinal movement of the connecting rod 132. The recess 1111 of the first box body 111 limits the movement of the connecting rod 132 in a direction perpendicular to the longitudinal direction, that is, the connecting rod 132 is installed on the first box body 111 in a manner that it can rotate relative to the first box body 111, thereby ensuring that when the force-applying member 1 applies force to the force receiving part 1311, the first force-applying part 1321 and the second force-applying part 1326 can respectively abut against the first abutting part 1211 and the second abutting part 1212 of the drum box 12.

[0081] When the processing box 100 starts the imaging work, the developing roller 15 contacts the photosensitive drum 14 to perform the developing and imaging work. When the processing box 100 installed in the electronic photographic imaging device does not perform the imaging work, for example, when the photosensitive drum 14 needs to be cleaned, the force-applying member 1 applies force F to the force receiving portion 1311, and pushes the force receiving member 131 to move in the direction close to the photosensitive drum 14 in the manner that the guide portion 1313 moves along the guide channel 1112, and the rack portion 1312 drives the gear portion 1322 to rotate, so that the first force-applying portion 1321 and the second force-applying portion 1326 provided at the two ends of the connecting rod 132 respectively abut against the first abutting portion 1211 and the second abutting portion 1212 of the second box body 121, and as the force-applying member 1 further applies force F, the force receiving portion 1311 is pushed to move in the direction close to the photosensitive drum 14. Force is applied to the force receiving portion 1311, and the connecting rod 132 further rotates. The first force applying portion 1321 and the second force applying portion 1326 respectively abut against the first abutting portion 1211 and the second abutting portion 1212 to limit the rotation of the connecting rod 132. The reaction force applied by the first abutting portion 1211 and the second abutting portion 1212 causes the first box body 111 to drive the separation member 13 to move in a direction opposite to the force F applied by the force applying member 1, thereby causing the first box body 111 to move in a direction away from the photosensitive drum 14, and at the same time overcome the elastic force of the elastic mechanism 122 to move the pushing member 123 in this direction, and the developing roller 15 is separated from the photosensitive drum 14. When the force-applying member 1 does not apply force to the force receiving portion 1311, the developing box 11 is pushed back to the initial position where the developing roller 15 contacts the photosensitive drum 14 by the pushing member 123 under the elastic force of the elastic mechanism 122, and the first abutting portion 1211 and the second abutting portion 1212 respectively push the first force-applying portion 1321 and the second force-applying portion 1326 to rotate in the opposite direction, and due to the engagement of the gear portion 1322 and the rack portion 1312, the force receiving member 131 also returns to its initial position, and the processing box 100 can start working.

[0082] In this embodiment, the structure of the separation member 13 is simple. By providing a force receiving portion at one end of the developing box and transmitting the force for separating the developing roller 15 from the photosensitive drum 14 to the force applying portions provided at the two ends of the developing box through the connecting portion, the developing roller 15 is separated relative to the photosensitive drum 14 in a direction perpendicular to the longitudinal direction. Compared with the case where the force receiving portions are provided at both ends of the developing box, the structure of the present invention is simple and the developing box structure is compact. In addition, no other structure is required to be provided on the drum box 12. As long as the second box body 121 can abut against the first force applying portion 1321 and the second force applying portion 1326 of the developing box, the structure of the drum box can also be simplified, and thus the structure of the processing box is simple. Furthermore, the electronic photographic imaging device only needs to provide a force applying member at one end of the developing box, so that the structure of the electronic photographic imaging device can also be simplified.

[0083] In this embodiment, the connecting rod of the separation component transmits the force that separates the developing roller from the photosensitive drum to the first force applying part and the second force applying part by rotation. It can be understood that in other embodiments, the connecting rod can also transmit the separation force to the first force applying part and the second force applying part abutting the drum box by translation or the like. At this time, a guiding mechanism for guiding the connecting part to move in a direction perpendicular to the longitudinal direction can be provided on the first box body to guide the movement of the connecting part in this direction. In addition, the connection between the first force applying part 1321 and the second force applying part 1326 and the connecting part can also be achieved by other means as long as the force transmission can be achieved.

[0084] In the present embodiment, the direction in which the urging member 1 applies the urging force to the developing cartridge is a direction from the rear side of the developing cartridge to the front side of the developing cartridge.

[0085] In the present embodiment, the force receiving portion 1311 may be disposed at the first longitudinal end or the second longitudinal end of the developing cartridge.

[0086] Example 2

[0087] like Figures 7 to 10 As shown, the processing box 100 includes a developing box 21 and a drum box 22 that can be installed together, and the developing roller 25 and the photosensitive drum 24 are parallel to each other and face each other. After the developer contained in the developing box 21 is used up, the developing box 21 can be removed from the drum box 22 and replaced with a new one. When the service life of the photosensitive drum 24 or other components installed in the drum box 22 is reached, a new drum box 22 can also be replaced. The drum box 22 includes a second box body 221 and a photosensitive drum 24, and the developing box 21 includes a first box body 211, a separation member 23, a developing roller 25, a powder feeding roller 26 and a stirring mechanism 27. The first box body 211 has a developer containing portion for containing the developer, and the stirring member 27 is arranged in the developer containing portion.

[0088] The drum box 22 includes a photosensitive drum 24 and a second box body 221, wherein the photosensitive drum 24 is rotatably mounted on the second box body 221, and the longitudinal ends of the second box body 221 are respectively provided with a first abutting portion 2211 and a second abutting portion (at positions corresponding to the first abutting portion 2111, not marked in the figure), and the first abutting portion 2211 and the second abutting portion are used to abut against the separation member 23 of the developer box 21, so that when the separation member 23 receives the force F applied by the electronic photographic imaging device, the developing roller 25 is separated from the photosensitive drum 24. The second box body 221 may also be provided with a pushing member and an elastic mechanism, and a pushing force is applied to the first box body 211 to make the developing roller 25 contact the photosensitive drum 24. A guiding and positioning structure can also be provided on the second box body 221 to guide the installation of the developing box 21 to the drum box 22. When the developing box 21 is installed to the drum box 22, it is installed to the drum box 22 along the installation direction with the developing roller 25 located at the front side. When installed in place, the developing roller 25 contacts the photosensitive drum 24.

[0089] The separation member 23 includes a connecting rod 231 and a spring 232 sleeved on the connecting rod 231 and abutting against the first box body 211. The spring 232 is a torsion spring and is provided as a reset mechanism. It is understandable that the reset mechanism can also be provided in other ways. The connecting rod 231 is provided in the recess 2111 of the first box body 211 and extends along the longitudinal direction of the developing box 21, and extends from the first longitudinal end to the second longitudinal end of the developing box 21. The force receiving portion 2311 is provided at the first longitudinal end of the connecting rod 231, and the first force applying portion 2312 is also provided at the end and has a certain angle with the force receiving portion 2311. The rod body 2313 as the connecting portion is also provided with a limiting portion 2314 as a first limiting structure, and the second force applying portion 2315 is provided at the second longitudinal end of the rod body 2313. The second force-applying portion 2315 is configured as a cam-shaped structure, the center of its large-radius arc portion is located at the center position of the rod body 2313, and the small-radius arc portion extends outward away from the rod body 2313. The limiting portion 2314 cooperates with the second limiting structure provided on the first box body 211 to limit the longitudinal movement of the connecting rod 231. The recess 2111 of the first box body 211 limits the movement of the connecting rod 231 in a direction perpendicular to the longitudinal direction, that is, the connecting rod 231 is installed on the first box body 211 in a manner that it can rotate relative to the first box body 211, thereby ensuring that when the force-applying member 1 applies force to the force receiving portion 2311, the first force-applying portion 2312 and the second force-applying portion 2315 can respectively abut against the first abutting portion 2211 and the second abutting portion of the drum box 22.

[0090] When the process cartridge 200 starts to operate, the developing roller 25 contacts the photosensitive drum 24 to perform developing and imaging operations. When the processing box 200 installed in the electronic photographic imaging device does not perform imaging work (such as cleaning the photosensitive drum 24), the force-applying member 1 applies a force F to the force receiving portion 2311 and pushes the connecting rod 231 to rotate to overcome the elastic force / restoring force of the spring 232, so that the first force-applying portion 2312 and the second force-applying portion 2315 arranged at the two ends of the connecting rod 231 respectively abut against the two abutting portions of the drum box 221, and as the force-applying member 1 further applies force to the force receiving portion 2311, the connecting rod 231 further rotates, because the first force-applying portion 2312 and the second force-applying portion 2315 respectively abut against the first abutting portion 2211 and the second abutting portion to limit the rotation of the connecting rod 231, the reaction force applied by the two abutting portions causes the first box body 211 to drive the connecting rod 231 to move in the opposite direction to the force F applied by the force-applying member 1, thereby causing the first box body 211 to move in a direction away from the photosensitive drum 24, and the developing roller 25 is separated from the photosensitive drum 24. When the force-applying member 1 does not apply force to the force receiving portion 2311, under the elastic force of the elastic mechanism, the developing box 21 is pushed back by the pushing member to the initial position where the developing roller 25 contacts the photosensitive drum 24, and the spring 232 causes the connecting rod 231 to rotate in the opposite direction under the elastic force, so that the connecting rod 231 is restored to the initial position when it does not receive the force applied by the force-applying member 1, and the processing box 200 can start working.

[0091] It is understandable that in Embodiment 1, the developing box may also be provided with a reset mechanism to return the force receiving member or the connecting rod to the initial position.

[0092] Example 3

[0093] In this embodiment, the same component names as those in the above embodiment will continue to be used, and the same components will not be described again here, but the corresponding numbers of each component will be the same as those in Example 1.

[0094] In the above-mentioned embodiments and the present embodiment, the developing roller 15 rotates around the rotation axis L, and the longitudinal direction is parallel to the direction in which the rotation axis L extends. The developing box 11 also includes a driving head 18. Along the longitudinal direction, the driving head 18 is located at one end of the first box body 111. The driving head 18 is used to receive a driving force from an electronic photographic imaging device (hereinafter referred to as the "imaging device") to drive the developing roller 15 to rotate. Therefore, the above-mentioned first longitudinal end can also be regarded as the driving end of the developing box 11 / processing box 100. Along the longitudinal direction, the second longitudinal end is arranged opposite to the first longitudinal end, and the second longitudinal end can be regarded as the non-driving end of the developing box 11 / processing box 100.

[0095] like Fig.11 and Fig.14As shown, the drum box 12 also includes a box side force member 124, which is rotatably arranged on the second box body 121 in a manner of rotating around an axis extending in the longitudinal direction. The box side force member 124 has a first part 124a, a second part 124b and a third part 124c, wherein the first part 124a and the second part 124b are both connected to the third part 124c, and the box side force member 124 rotates around the third part 124c, the first part 124a is used to receive the force F applied by the force member 1 in the imaging device, and the second part 124b is used to transfer the force F to the separation member 13.

[0096] like Fig. 12A As shown, the force receiving member 131 in this embodiment is configured to be rotatable about an axis parallel to the longitudinal direction, combined with Fig.13 and Fig.14 When the force applying member 1 applies force F to the first portion 124a, the box side force applying member 124 moves along the third portion 124c. Fig.14 The second portion 124b pushes the force receiving portion 1311 so that the force receiving member 1311 moves along the Fig.13 The force receiving member 131 rotates in the direction indicated by r1, and the protrusion (another embodiment of the active part) 1312 on the force receiving member 131 moves along with the movement of the force receiving part 1311, and transmits the force F to the abutted part (another embodiment of the driven part) 1322 on the first force applying part 1321. Subsequently, the first force applying part 1321 abuts against the second abutting part 1212 on the drum box 12. At the same time, the force is also transmitted to the second force applying part 1326 through the rod body 1324, and the second force applying part 1326 abuts against the first abutting part 1211 on the drum box 12. In this embodiment, the protrusion 1312 transmits force by directly abutting against the abutted part 1322.

[0097] Similarly, when the processing box 100 is working / imaging, the developing roller 15 contacts the photosensitive drum 14. When the processing box 100 is not performing imaging work, for example, when the photosensitive drum 14 needs to be cleaned, the force-applying member 1 starts to apply force F to the first portion 124a, and finally the first force-applying portion 1321 and the second force-applying portion 1326 abut against the second abutting portion 1212 and the first abutting portion 1211 respectively to limit the rotation of the connecting rod 132. The reaction force applied by the first abutting portion 1211 and the first abutting portion 1212 causes the first box body 111 to drive The developing roller 15 moves in a direction away from the photosensitive drum 14, and the developing roller 15 and the photosensitive drum 14 are separated from each other, that is, the first force applying portion 1321 and the second force applying portion 1326 move in response to the movement of the force receiving portion 1311 relative to the drum box 12 / the second box body 121 / the photosensitive drum 14; preferably, the first box body 111 moves in a direction opposite to the force F applied by the force applying member 1, and at the same time, the elastic force of the elastic mechanism 122 is overcome, and the pushing member 123 also moves in a direction away from the photosensitive drum 14, thereby separating the developing roller 15 from the photosensitive drum 14.

[0098] When the force-applying member 1 does not apply force F to the first part 124a, the developer box 11 is pushed back to the initial position where the developing roller 15 contacts the photosensitive drum 14 by the pushing member 123 under the elastic force of the elastic mechanism 122, and the second abutment portion 1212 and the first abutment portion 1211 respectively push the first force-applying portion 1321 and the second force-applying portion 1326 to rotate in the opposite direction, and through the abutment between the first force-applying portion 1321 and the protrusion 1312, the force receiving member 131 also returns to its initial position. At the same time, the box side force-applying member 124 is also reset, and the processing box 100 can start imaging.

[0099] In some embodiments, a reset member for forcing at least one of the force receiving member 131 and the box side force applying member 124 to reset may also be provided in the developing box 11 to ensure that the force receiving member 131 and the box side force applying member 124 can return to their respective initial positions.

[0100] Similar to Example 1, in the developing box 11 in this embodiment, it is only necessary to set a force receiving member 131 at the driving end, and the force for separating the developing roller 15 and the photosensitive drum 14 is transmitted to the non-driving end through the connecting portion 1324, so as to realize the separation of the developing roller 15 and the photosensitive drum 14 from each other. The structure of the developing box 11 in this embodiment also becomes simple and compact; correspondingly, in the drum box 12, it is only necessary to set a box side force member 124 at the driving end, and thus, the structure of the processing box 100 also becomes simple; further, the imaging device only needs to set a force member 1 at the driving end of the processing box 100 / developing box 11, and thus, the structure of the imaging device is also simplified.

[0101] Based on the above-mentioned inventive concept, the box side force-applying member 124 and the force receiving member 131 can also be arranged only at the non-driving end. Through the connecting portion 1324, the first force-applying portion 1321 arranged at the driving end can also receive the force F, thereby realizing the mutual separation of the developing roller 15 and the photosensitive drum 14. The developing box 11 with this structure also has the advantages of simple and compact structure, and the structure of the processing box 100 and the imaging device can also be simplified.

[0102] In some embodiments, the developing box 11 further includes a chip assembly 300, the chip assembly 300 includes a chip frame 31 connected to the first box body 111 and a chip 32 supported by the chip frame 31. When the developing box 11 is installed in the imaging device, the chip 32 is connected to the contact pin 403 (such as Fig.13 As shown), the developing box 11 / processing box 100 establishes a communication connection with the imaging device.

[0103] Furthermore, the developing box 11 further includes a driving force transmission component 5 for transmitting the driving force received by the driving head 18 to various components in the developing box 11, such as Fig. 12B As shown, the driving force transmission component 5 includes a driving force transmission part 51, an intermediate part, a first driving force receiving part 54, a second driving force receiving part 55 and a third driving force receiving part 57. The driving force transmission part 51 is coaxially arranged with the driving head 18, and the intermediate part is used to transmit the driving force of the driving force transmission part 51. The first driving force receiving part 54 is coaxially arranged with the powder feeding roller 16 as a powder feeding roller driving part, the second driving force receiving part 55 is coaxially arranged with the developing roller 15 as a developing roller driving part, and the third driving force receiving part 57 is coaxially arranged with the stirring mechanism 17 as a stirring mechanism driving part. In this way, the developing roller 15, the powder feeding roller 16 and the stirring mechanism 17 can be driven respectively.

[0104] Specifically, the driving force transmitting part 51, the first driving force receiving part 54, the second driving force receiving part 55 and the third driving force receiving part 57 are all configured as gears, and the intermediate part includes at least one idler wheel. More specifically, the intermediate part includes a first idler wheel / first intermediate part 52, a second idler wheel / second intermediate part 53 and a third idler wheel / third intermediate part 56, wherein the first idler wheel / first intermediate part 52 is meshed with the driving force transmitting part 51 and the second idler wheel / second intermediate part 53 at the same time, that is, the first idler wheel / first intermediate part 52 is connected to the second idler wheel / second intermediate piece 53 and driving force transmission part 51, the second idler gear / second intermediate piece 53 is also meshed with the developing roller gear / second driving force receiving part 55 and the powder feeding roller gear / first driving force receiving part 54 at the same time, the third idler gear / third intermediate piece 56 includes a coaxially arranged large gear part / large diameter part 561 and a small gear part / small diameter part 562, the driving force transmission part 51 is also meshed with the large gear part / large diameter part 561, and the small gear part 562 / small diameter part is also meshed with the stirring mechanism gear / third driving force receiving part 57. This form of gear arrangement is conducive to the miniaturization design of the developing cartridge.

[0105] In some embodiments, the driving force transmitting portion 51 can also be configured as a ratchet, a friction wheel, etc., and each driving force receiving portion can also be configured as a ratchet, a friction wheel, etc. accordingly. Therefore, the above-mentioned meshing is only one of the coupling modes between the corresponding components.

[0106] In some embodiments, the driving force transmission assembly 5 can also transmit the driving force through a belt.

[0107] In some embodiments, the third idler gear / third intermediate member 56 and the stirring mechanism gear / third driving force receiving portion 57 may also be omitted, so that the driving force transmission assembly 5 becomes simpler.

[0108] Example 4

[0109] Different from the third embodiment, the rod body 1324 in this embodiment is configured to move at least along a straight line, and the direction in which the straight line extends does not need to be perpendicular to the longitudinal direction. Preferably, the rod body 1324 moves along a direction parallel to the longitudinal direction.

[0110] like Figure 15-18 As shown, the force receiving member 131 is also configured to be rotatable around an axis parallel to the longitudinal direction, wherein a force receiving portion 1311 and a protruding portion 1312 are provided, and the connecting rod 132 includes a rod body 1324 and abutted portions 1322 and a second force applying portion 1326 respectively located at both ends of the rod body 1324; Fig.17As shown, the abutted portion 1322 is provided with an abutted surface 1328 inclined relative to the longitudinal direction, and the protruding portion 1312 is provided with an abutting surface 1314 for abutting against the abutted surface 1328. The shape of the abutting surface 1314 should not be restricted as long as the abutting surface 1314 can transfer the force to the abutted surface 1328. On the contrary, the abutting surface 1314 is set to be inclined relative to the longitudinal direction, and the shape of the abutted surface 1328 is not restricted. That is to say, at least one of the abutting surface 1314 and the abutted surface 1328 can be set as an inclined surface inclined relative to the longitudinal direction. Specifically, the abutting surface 1314 transfers the force by squeezing the abutted surface 1328 against each other. Preferably, the abutting surface 1314 is set to be able to match the abutted surface 1328, so that the force transmission will be smoother.

[0111] Preferably, the developing box 11 is provided with a guide path 1122, and the first force applying portion 1321 in the separating member 13 is provided on the force receiving member 131, or the first force applying portion 1321 is provided to be movable with the movement of the force receiving member 131; when the force applying member 1 of the imaging device applies a force F to the first portion 124a, the box side force applying member 124 moves along the Fig.16 The second portion 124b pushes the force receiving portion 1311 so that the force receiving member 1311 moves along the Fig.16 The protrusion 1312 rotates in the direction shown by r1, and moves following the movement of the force receiving portion 1311. The abutment surface 1314 abuts against the abutted surface 1328. Under the limitation of the guide path 1122, the connecting portion 1324 moves horizontally along a predetermined path, so that the force can be transmitted to the non-driving end / second longitudinal end.

[0112] Continue as Fig.17 As shown, the second force-applying portion 1326 is also provided with an extrusion surface 1327 inclined relative to the longitudinal direction. As the force is transmitted to the non-driving end / second longitudinal end, the second force-applying portion 1326 is pushed by the rod body 1324, and the extrusion surface 1327 abuts against the first abutting portion 1211 and is squeezed. At this time, at the driving end / first longitudinal end of the developing box 11, the first force-applying portion 1321 abuts against the second abutting portion 1212, and at the non-driving end / second longitudinal end of the developing box 11, the second force-applying portion 1326 / extrusion surface 1327 abuts against the first abutting portion 1211. The reaction force applied by the first abutting portion 1211 and the second abutting portion 1212 causes the first box body 111 to drive the developing roller 15 to move in a direction away from the photosensitive drum 14, so that the developing roller 15 and the photosensitive drum 14 are separated from each other.

[0113] Furthermore, the separation member 13 in this embodiment also includes a first reset member (a part of the reset mechanism) 133. When the force-applying member 1 applies force F, the first reset member 133 accumulates the reset force. When the force F is withdrawn, the first reset member 133 releases the reset force, and the connecting portion 1324 is reset. At the same time, under the action of the abutted surface 1328 and the abutting surface 1314, the force receiving member 131 is also reset.

[0114] Preferably, the developing box 11 also includes a second reset member (part of the reset mechanism) 134 connected to the force receiving member 131. When the force-applying component 1 applies force F, the second reset member 134 accumulates the reset force. When the force F is withdrawn, the second reset member 134 releases the reset force, so that the force receiving member 131 can be reset more smoothly.

[0115] In some embodiments, the developing box 11 also includes a guide plate 19 for guiding the movement of the second force applying portion 1326. When the extrusion surface 1327 is squeezed so that the second force applying portion 1326 moves away from the photosensitive drum 14, the movement direction of the second force applying portion 1326 can be guided by the guide plate 19 to ensure that the developing box 11 / the second force applying portion 1326 moves in a predetermined direction.

[0116] As described above, in the developing box 11 in this embodiment, it is only necessary to set the force receiving member 131 at one of the driving end and the non-driving end, and the force for separating the developing roller 15 and the photosensitive drum 14 is transmitted to the other end through the connecting portion 1324, so as to realize the separation of the developing roller 15 and the photosensitive drum 14 from each other. The structure of the developing box 11 in this embodiment also becomes simple and compact; accordingly, it is only necessary to set the box side force member 124 at the driving end in the drum box 12, and thus, the structure of the processing box 100 also becomes simple; further, the imaging device only needs to set the force member 1 at the driving end of the processing box 100 / developing box 11, and thus, the structure of the imaging device is also simplified.

[0117] Example 5

[0118] On the basis of Embodiment 4, this embodiment further simplifies the separation component 13, such as Figure 19-21 As shown, the force receiving portion 1311 in this embodiment is provided with a force receiving surface which is not parallel to the longitudinal direction, and the force receiving surface is provided as an inclined surface / helical surface. According to the rotation direction r2 after the box side force applying member 124 is driven by the force F, the force receiving surface extends along the rotation direction r2, and along the longitudinal direction, the force receiving surface extends gradually away from the first box body 111; the structure of the separation member 13 at the non-driving end is the same as that of embodiment 4, as shown in FIG. Fig.21 As shown, at the non-driving end, the developing box 11 is also provided with a second force applying portion 1326, and the second force applying portion 1326 has an extrusion surface 1327 inclined relative to the longitudinal direction.

[0119] When the force-applying member 1 of the imaging device applies a force F to the box-side force-applying member 124, the second portion 124b begins to abut against the force receiving surface, and the force receiving surface decomposes the force F into a first component force along the longitudinal direction and a second component force along the direction intersecting the longitudinal direction. The first component force forces the developing box 11 to move along the longitudinal direction as a whole, and the force is transmitted from the driving end to the non-driving end through the first box body 111. The extrusion surface 1327 at the non-driving end abuts against the first abutting portion 1211, thereby causing the developing roller 15 to abut against the photosensitive drum 14 to move toward the developing roller 15. The developing roller 15 and the photosensitive drum 14 are separated from each other at least at the end where the extrusion surface 1327 is provided. The second component force forces the end of the developing box 11 where the force receiving portion 1311 is provided to move in the direction away from the photosensitive drum 14, thereby making the developing roller 15 and the photosensitive drum 14 separated from each other at least at the end where the force receiving portion 1311 is provided. In this way, at the driving end and the non-driving end of the developing box 11, the developing roller 15 and the photosensitive drum 14 are separated from each other. At the same time, the elastic force of the elastic mechanism 122 is overcome, and the pushing member 123 is forced to move in the direction away from the photosensitive drum 14.

[0120] When the force F is removed, the elastic mechanism 122 releases the elastic force, and the pushing member 123 forces the developing box 11 to move toward the direction close to the photosensitive drum 14 again, and the developing roller 15 and the photosensitive drum 14 approach each other again.

[0121] Compared with Example 4, the separation member 13 in this embodiment does not need to be provided with a connecting portion 1324, or in other words, the connecting portion 1324 in this embodiment is the first box body 111 itself, and the force receiving portion 1311 can be regarded as the first force applying portion 1321, and correspondingly, the box side force applying member 124 can be regarded as the second abutting portion 1212. It can be seen that the structure of the developing box 11 and the structure of the drum box 12 in this embodiment can be further simplified. Preferably, the force receiving member 131 in this embodiment is fixedly arranged on the first box body 111, and when the box side force applying member 124 applies force F to the force receiving portion 1311, the force receiving portion 1311 equivalent to the first force applying portion 1321 will move along with the movement of the first box body 111 relative to the drum box 12 / the second box body 121 / the photosensitive drum 14, or in other words, the first force applying portion 1321 moves in response to the movement of the force receiving portion 1311 relative to the drum box 12 / the second box body 121 / the photosensitive drum 14, and at the same time, the second force applying portion 1326 also moves along with the movement of the first box body 111 relative to the drum box 12 / the second box body 121 / the photosensitive drum 14, or in other words, the second force applying portion 1326 also moves in response to the movement of the force receiving portion 1311 relative to the drum box 12 / the second box body 121 / the photosensitive drum 14, and the developing roller 15 and the photosensitive drum 14 are separated from each other.

[0122] Example 6

[0123] like Fig.22A , Fig. 22B , Fig.23 , Fig.24 and Fig.25 As shown, in order to make the following description clearer, the direction parallel to the longitudinal direction is defined as the left-right direction, the direction intersecting the longitudinal direction is the front-to-back direction / lateral direction, and the direction intersecting the longitudinal direction and the front-to-back direction is the up-down direction / vertical direction. Preferably, the left-right direction, the front-to-back direction, and the up-down direction are perpendicular to each other. Specifically, along the left-right direction, the driving end is located on the left side of the developing box 11, and the right side is opposite to the left side. Along the front-to-back direction, the developing roller 15 is arranged in front of the developing box 11, and the rear side is opposite to the front. Along the up-down direction, the exposed side of the developing roller 15 is the top, and the bottom side is opposite to the top.

[0124] First, the structure of the drum box 12 is further described. Fig.22A As shown, the drum box 12 also includes a first support member 141 and a second support member 142 arranged in the second box body 121, the first support member 141 and the second support member 142 are arranged opposite to each other in the longitudinal direction of the developing box, and the photosensitive drum 14 is supported by the first support member 141 and the second support member 142, and the first support member 141 includes a first supporting body 141a and a first extension portion 141b connected to each other, wherein the first supporting body 141a is used to support the photosensitive drum 14, and the first extension portion 141b is extended from the first supporting body 141a to support at least a portion of the developing box 11.

[0125] The first extension portion 141b includes a first upper extension portion 141d and a first lower extension portion 141c which are spaced apart in the up-down direction, and a first middle portion 141g connects the first upper extension portion 141d and the first lower extension portion 141c. Along the front-to-back direction, the first upper extension portion 141d and the first lower extension portion 141c both extend rearward from the first middle portion 141g. Along the front-to-back direction, at least a portion of the first middle portion 141g faces rearward. Along the up-to-down direction, a first installation space 141e is formed between the first upper extension portion 141d and the first lower extension portion 141c, and the first installation space 141e is open toward the rear. The first upper extension portion 141d has a first lower surface 141f facing the first installation space 141e.

[0126] The second support member 142 has a substantially same structure as the first support member 141, such as Fig. 22B As shown, the second support member 142 includes a second support body 142a and a second extension portion 142b connected to each other, wherein the second support body 142a is used to support the photosensitive drum 14, and the second extension portion 142b is extended from the second support body 142a to support at least a portion of the developing box 11.

[0127] The second extension portion 142b includes a second upper extension portion 142d and a second lower extension portion 142c spaced apart in the up-down direction, and a second middle portion 142g connects the second upper extension portion 142d and the second lower extension portion 142c. Along the front-to-back direction, the second upper extension portion 142d and the second lower extension portion 142c both extend rearward from the second middle portion 142g. Along the front-to-back direction, at least a portion of the second middle portion 142g faces rearward. Along the up-to-down direction, a second installation space 142e is formed between the second upper extension portion 142d and the second lower extension portion 142c. The second installation space 142e is open toward the rear, and the second upper extension portion 142d has a second lower surface 142f facing the second installation space 142e.

[0128] Furthermore, along the left-right direction, the second box body 121 also has a left side wall 1210L and a right side wall 1210R that are spaced apart, the first support member 141 is arranged close to the right side wall 1210R, the second support member 142 is arranged close to the left side wall 1210L, and the first support member 141 and the second support member 142 are arranged between the left side wall 1210L and the right side wall 1210R, and the box side force member 124 is exposed from the left side wall 1210L.

[0129] Continue as Fig.22A and Fig. 22B As shown, the forced pushing member 123 includes a left forced pushing member 123L and a right forced pushing member 123R which are spaced apart in the left-right direction. Along the front-back direction, the left forced pushing member 123L is opposite to the left supporting member 142, and the right forced pushing member 123R is opposite to the right supporting member 141.

[0130] In the developer box 11 involved in this embodiment, the structure of the force receiving portion 1311 located at the driving end is the same as that of Embodiment 5 and will not be repeated here. The structure of the second force applying portion 1326 located at the non-driving end is changed.

[0131] like Fig.23 As shown, the developing box 11 also includes a bracket 1113 arranged at the non-driving end, a right forced pushing portion 1115R, a second force applying portion 1326 and a third reset member (a part of the reset mechanism) 135, the developing roller 15 is rotatably supported by the bracket 1113, the bracket 1113 is connected to the first box body 111, the second force applying portion 1326 and the right forced pushing portion 1115R are arranged on the bracket 1113, which can improve the versatility of the first box body 111, the second force applying portion 1326 is also provided with an extrusion surface 1327, and the extrusion surface 1327 is arranged so that the distance between the extrusion surface 1327 and the rotation axis L in a direction perpendicular to the rotation axis gradually decreases from left to right, and when the developing box 11 is installed to the drum box 12, along the up and down direction, the extrusion surface 1327 is opposite to the first lower surface 141f, and along the left and right direction, the extrusion surface 1327 is opposite to the first support member 141.

[0132] This embodiment and the following embodiments 7 and 8 focus on describing that the extrusion surface 1327 is set at the non-driving end, and the developer box 11 receives the separation force applied by the force component 1 of the imaging device at the driving end. However, it can be understood that the extrusion surface 1327 can also be set at the driving end, and the developer box 11 receives the separation force applied by the force component 1 of the imaging device at the non-driving end.

[0133] The right forced pushing portion 1115R is formed to protrude from the bracket 1113 and is used to abut against the right forced pushing member 123R so that the developing roller 15 and the photosensitive drum 14 are kept in contact / close to each other. In some embodiments, when a part of the right forced pushing member 123R is made of a conductive material, the right forced pushing member 123R can also supply power to the developing roller 15. Fig. 22B As shown, the non-driving side of the drum cartridge 12 is provided with a power receiving member 125, and the right urging member 123R contacts the power receiving member 125 to receive power.

[0134] The third reset member 135 at least includes an elastic member 1351. When the force receiving portion 1311 receives the separation force, the developing roller 15 and the photosensitive drum 14 are separated from each other at the first longitudinal end of the developing cartridge 11. At the same time, the developing cartridge 11 moves rightward, the elastic member 1351 is elastically deformed, and the extrusion surface 1327 and the first support member 141 are pressed against each other. On the contrary, the first support member 141 applies a reaction force to the extrusion surface 1327. Under the action of the reaction force, the developing cartridge 11 moves backward. At the second longitudinal end of the developing roller 15 and the photosensitive drum 14, finally, along the left and right directions, the developing roller 15 and the photosensitive drum 14 are separated from each other. At the same time, the pushing member 123 (including the left pushing member 123L and the right pushing member 123R) is pushed by the developing box 11, so that the elastic mechanism 122 accumulates elastic force; when the separation force is cancelled, the elastic member 1351 releases the elastic force, and the developing box 11 moves to the left. At the same time, the elastic mechanism 122 releases the elastic force, and the pushing member 123 forces the developing box 11 to move forward and reset.

[0135] In this embodiment, the first support member 141 has a portion for pressing with the pressing surface 1327, such as Fig.22A and Fig.24As shown, the portion for extrusion with the extrusion surface 1327 is an edge / surface (first abutment portion) 1211 arranged on the first support member 141, and the edge / surface 1211 (first abutment portion) is adjacent to the first lower surface 141f. Along the front-to-back direction, the extrusion surface 1327 is located in front of the rotation axis L of the developing roller 15. When the extrusion surface 1327 and the developing roller 15 are projected along a direction perpendicular to the rotation axis L, at least a portion of the developing roller 15 overlaps with the extrusion surface 1327. According to the description of this embodiment and the above-mentioned embodiments, the first abutment portion 1211 can be arranged on the second box body 121 or on the first support member 141.

[0136] In some embodiments, the third reset member 135 also includes an abutment block 1352. Preferably, the elastic member 1351 is arranged between the abutment block 1352 and the first box body 111 / bracket 1113. On the one hand, the abutment block 1352 can protect the elastic member 1351. On the other hand, the abutment block 1352 can also limit the movement trajectory of the elastic member 1351 to ensure that the developing box 11 moves along a predetermined path; more preferably, the abutment block 1352 is also provided with a mated portion 1353, through which the position of the abutment block 1352 in the developing box 11 can be precisely located, so that the movement trajectory of the elastic member 1351 can be effectively controlled by the abutment block 1352, and accordingly, a mating portion 121a for mating with the mated portion 1353 is provided on the right side wall 1210R.

[0137] In one embodiment of the mated portion 1353, Fig.24 As shown, the engaged portion 1353 and the mating portion 121a are both configured as step portions that can be mated with each other; it is feasible that the engaged portion 1353 and the mating portion 121a can also be configured as a shaft hole mating structure, a keyway mating structure, etc.

[0138] In a deformable embodiment, at least one of the right forced pushing portion 1115R and the second force applying portion 1326 can also be arranged on the first box body 111. As described above, the pressing surface 1327 in this embodiment is arranged to face upward. When the developing box 11 is installed to the drum box 12, preferably, there is a first gap between the pressing surface 1327 and the first abutting portion 1211, and the first gap is between 0.5mm-3mm to ensure that the developing roller 15 and the photosensitive drum 14 maintain stable contact during the imaging operation; more preferably, there is a second gap g between the second force applying portion 1326 and the photosensitive drum 14, and the second gap g is between 1mm-5mm to prevent the photosensitive drum 14 from colliding with the second force applying portion 1326 and being damaged.

[0139] Further, when the first force-applying portion 1321 receives the force applied by the force-applying member 1, the developing box 100 will move to the right, and the extrusion surface 1327 begins to abut against the first abutting portion 1211 and be squeezed, and the developing box 11 has a tendency to be squeezed downward, that is, the upward movement that may be produced by the developing box 11 is stopped, and under the guidance of the first lower extension portion 141c, the developing box 11 moves backward, and the developing roller 15 and the photosensitive drum 14 are separated from each other.

[0140] Combine the following Fig.24 and Fig.25 The mounting process of the developing cartridge 11 to the drum cartridge 12 according to this embodiment will be described.

[0141] First, the developing box 11 approaches the drum box 12 in an inverted posture (the developing roller 15 is located downstream of the installation direction), and the developing box 11 is provided with a left positioning portion 1116L and a right positioning portion 1116R at the driving end and the non-driving end respectively, and the left positioning portion 1116L and the right positioning portion 1116R are respectively abutted against the second upper extension portion 142d and the first upper extension portion 141d, so that the developing box 11 is preliminarily positioned in the drum box 12, and the developing box 11 is in the first state.

[0142] Subsequently, the right forced pushing portion 1115R begins to slide and abut against the right forced pushing member 123R, and the developing box 11 rotates with the abutment position of the right forced pushing portion 1115R and the right forced pushing member 123R as the support point, until the engaged portion 1353 completes the engagement with the engaging portion 121a, at this time, the extrusion surface 1327 is opposite to the first abutment portion 1211, and at the driving end of the developing box 11, the developing box 11 can also rotate with the sliding abutment position of the left forced pushing portion 1115L set at the driving end and the left forced pushing member 123L as the support point, the developing box 11 is pushed by the forced pushing member 123 so that the developing roller 15 and the photosensitive drum 14 are close to / contacted with each other, and the developing box 11 is in the second state.

[0143] In some embodiments, the extrusion surface 1327 can also be configured so that when the developer box 11 is installed to the drum box 12, along the front-to-back direction, the extrusion surface 1327 is opposite to the first middle portion 141g, that is, the extrusion surface 1327 is configured to face the front, and the portion of the first support member 141 used to be extruded with the extrusion surface 1327 is still the edge / surface (first abutting portion) 1211 provided on the first support member 141, and the edge / surface 1211 is adjacent to the first installation space 141e. When the developer box 11 moves to the right so that the extrusion surface 1327 abuts against the first abutting portion 1211, the developer box 11 will move directly backwards, and the developing roller 15 and the photosensitive drum 14 are separated from each other. In this structure, the upward movement that may be generated by the developer box 11 can also be blocked by the first upper extension portion 141d.

[0144] Example 7

[0145] like Fig.26 As shown, the same components and structures as those in the above-mentioned embodiments are not described in detail herein. In this embodiment, the second force-applying portion 1326 is configured as a protrusion protruding from the first box body 111 or the bracket 1113, and the extrusion surface 1327 is an inclined surface arranged on the second force-applying portion 1326, and its inclination direction is such that, along the direction from left to right, the distance between the extrusion surface 1327 and the rotation axis L of the developing roller 15 in the front-to-back direction gradually increases; the first abutting portion 1211 for abutting against the extrusion surface 1327 is formed by extending to the left from the right side wall 1210R.

[0146] Compared with Example 6, the extrusion surface 1327 in this embodiment is arranged farther away from the developing roller 15 along the front-to-back direction. Preferably, the extrusion surface 1327 is arranged on the rear side of the developing roller 15, so that during the installation of the developing box 11 toward the drum box 12, the second force-applying portion 1326 provided with the extrusion surface 1327 can be avoided from contacting the photosensitive drum 14; preferably, before the driving end of the developing box 11 receives the separation force, a gap is formed between the extrusion surface 1327 and the first abutment portion 1211 to ensure that the developing roller 15 and the photosensitive drum 14 maintain stable contact.

[0147] Example 8

[0148] like Fig.27A and Fig.27B As shown, in this embodiment, the second force-applying portion 1326 / extrusion surface 1327 arranged at the non-driving end is configured to abut against a component in the imaging device, that is, the first abutment portion 1211 is no longer provided in the drum box 12, or in other words, the first abutment portion 1211 for pressing against the extrusion surface 1327 is provided in the imaging device.

[0149] like Fig.27A As shown, the imaging device is provided with a guide rail 9, and in the process of installing the developing box 11 / processing box 100 toward the imaging device or removing it from the imaging device, the developing box 11 / processing box 100 is guided by the guide rail 9; specifically, the imaging device further includes a guided protrusion / second force-applying portion 1326 arranged at the non-driving end, and the extrusion surface 1327 is arranged on the guided protrusion 1326. Preferably, the extrusion surface 1327 is an inclined surface arranged on the guiding protrusion 1326, and the inclined surface can be either an inclined plane or an inclined arc surface. Fig.27A An embodiment in which the extrusion surface 1327 is configured as a conical surface is shown.

[0150] When the driving end of the developing box 11 receives the separation force and causes the developing box 11 to move to the right, the extrusion surface 1327 and the guide surface 91 set on the guide rail 9 or the edge / surface adjacent to the guide surface 91 are squeezed against each other until at least a portion of the extrusion surface 1327 reaches above the guide surface 91.

[0151] Example 9

[0152] like Fig.28 , Fig.29A and Fig.29B As shown, the force-applying member 1 can be arranged at the driving end of the developing box 11, or at the non-driving end of the developing box 11, or at both the driving end and the non-driving end of the developing box 11, that is, the force-applying member 1 includes at least one of a left force-applying member located at the driving end of the developing box 11 and a right force-applying member located at the non-driving end of the developing box 11.

[0153] In some embodiments, when the force-applying member 1 is simultaneously provided at the driving end and the non-driving end of the developing box 11, the left force-applying member applies a separation force to the box side force-applying member 124, and the box side force-applying member 124 then applies the separation force to the developing box 11, while the right force-applying member directly applies a separation force to the developing box 11.

[0154] like Fig.28 As shown, the imaging device is also provided with a driving force output member 92 for combining with the driving head 18 in the developing box 11 to transmit the driving force, and an elastic member 93 abutting against the driving force output member 92, that is, the driving force output member 92 is used to output the driving force to the developing box 11, and the elastic member 93 is used to push the driving force output member 92 toward the developing box 11, so that the driving force output member 92 can form a stable combination with the driving head 18; therefore, when the developing box 11 completes the combination with the driving force output member 92, under the pushing action of the elastic member 93, the developing box 11 has a tendency to move to the right. Based on the above-mentioned inventive concept, when the non-driving end of the developing box 11 is provided with an extrusion surface 1327, it may happen that even if the left force member does not apply a separation force to the developing box 11, the developing roller 15 and the photosensitive drum 14 will become separated from each other due to the backward movement of the developing box 11.

[0155] To this end, the developing cartridge 11 according to the present embodiment realizes the separation of the developing roller 15 and the photosensitive drum 14 by receiving the separation force applied by the right force applying member.

[0156] Specifically, Fig.28 As shown, the developer cartridge 11 includes a second force-applying portion 1326 respectively arranged at the driving end and a first force-applying portion 1321 arranged at the non-driving end, and the second force-applying portion 1326 is further provided with a left extrusion surface 1327L, and the first force-applying portion 1321 is further provided with a right extrusion surface 1327R, that is, along the left and right directions, the second force-applying portion 1326 and the driving head 18 are arranged at the same end of the developer cartridge 11, wherein the left extrusion surface 1327L is used to contact with the second abutting portion 1212 (such as Fig. 22BAs shown in the figure, the right extrusion surface 1327R is used to abut against the first abutment portion 1211 arranged at the non-driving end, so that the developing roller 15 and the photosensitive drum 14 are separated from each other at the driving end and the non-driving end at the same time.

[0157] Specifically, the structure of the second force applying portion 1326 / left extrusion surface 1327L in this embodiment is basically the same as the structure of the extrusion surface in Example 6, except that the second force applying portion 1326 / left extrusion surface 1327L in this embodiment is arranged at the driving end, and along the direction from left to right, the distance between the left extrusion surface 1327L and the rotation axis L of the developing roller 15 in the front-to-back direction gradually increases; the first force applying portion 1321 in this embodiment is a protrusion protruding from the first box body 111 or the bracket 1113, and the right extrusion surface 1327R arranged on the first force applying portion 1321 is formed so that along the direction from left to right, the distance between the right extrusion surface 1327R and the rotation axis L of the developing roller 15 in the front-to-back direction gradually increases.

[0158] The force receiving portion 1311 is arranged at the non-driving end. The right force applying member 1 moves forward and presses the force receiving portion 1311. The developing box 11 starts to move to the left. The right pressing surface 1327R contacts the first abutting portion 1211 (such as Fig.22A The left extrusion surface 1327L abuts against the second abutment portion 1212 (as shown in FIG. Fig. 22B As shown in the figure, the elastic force of the elastic member 93 in the imaging device is overcome, or in other words, the elastic member 93 accumulates elastic force, and the reaction force applied to the left extrusion surface 1327L and the right extrusion surface 1327R by the drum box 12 respectively, the developing box 11 moves backward, and the developing roller 15 and the photosensitive drum 14 are separated from each other.

[0159] When the right force applying member 1 no longer applies the separation force, the elastic member 93 releases the elastic force to push the developing box 11 to move to the right, and at the same time, the pushing member 123 pushes the developing box 100 forward to reset.

[0160] Preferably, when the developing box 11 is installed to the drum box 12, the left extrusion surface 1327L in this embodiment is opposite to the second lower surface 142f, so that the upward movement tendency of the driving end of the developing box 11 can be stopped. That is to say, the second abutment portion 1212 in this embodiment can also be arranged on the second support member 142. Specifically, the second abutment portion 1212 is an edge / surface adjacent to the second lower surface 142f; the second abutment portion 1212 can be arranged on one of the first box body 111 and the bracket 1113.

[0161] Preferably, when the developer cartridge 11 is mounted to the drum cartridge 12 , gaps are formed between the left pressing surface 1327L and the second abutment portion 1212 and between the right pressing surface 1327R and the first abutment portion 1211 to ensure that the developer roller 15 and the photosensitive drum 14 maintain stable contact.

[0162] According to the above description, it can be seen that the separation member 13 in this embodiment no longer needs to be provided with a reset member / reset mechanism, but instead utilizes the elastic member 93 in the imaging device for forcing the driving force output member 92 to force the developer box 11 to reset, thereby, the structure of the separation member 13 will become simpler; it can be understood that in the above-mentioned embodiments 6, 7, and 8, the elastic force of the third reset member 135 should be greater than the elastic force of the elastic member 93 in the imaging device to ensure that the developer box 11 can be smoothly reset.

[0163] Example 10

[0164] Based on the structure described in the above embodiment, this embodiment continues to optimize the structure of the developing box 11 to ensure that the developing roller 15 and the photosensitive drum 14 are completely separated.

[0165] like Fig.30 As shown, the developing box 11 also includes an extender 1114, which is used to abut against an action part outside the developing box 11 so that the developing roller 15 and the photosensitive drum 14 are completely separated. The action part can be set on the drum box 12 or in the imaging device.

[0166] As described above, the separation member 13 can be set at the driving end or the non-driving end. Along the longitudinal direction, the range extender 1114 is set at the end opposite to the end where the separation member 13 is located. That is to say, the range extender 1114 is not set on the same side as the separation member 13. When the separation member 13 is set at the driving end, the range extender 1114 is set at the non-driving end. When the separation member 13 is set at the non-driving end, the range extender 1114 is set at the driving end.

[0167] Continue as Fig.30 As shown, the developing roller 15 includes a developing layer 151 and a developing roller shaft 152, and the developing roller shaft 152 is rotatably supported by the bracket 1113. Along the longitudinal direction, the developing roller shaft 152 protrudes from the developing layer 151, and the size of the developing roller shaft 152 between the driving end end and the non-driving end end is larger than the size of the developing layer 151 between the driving end end and the non-driving end end. The developing layer 151 has a left end 151a located at the driving end and a right end 151b located at the non-driving end, and the area (carrying area) S between the left end 151a and the right end 151b is used to carry the developer, that is, a carrying area S for carrying the developer is formed between the two ends of the developing layer 151, and when the developing roller 15 and the photosensitive drum 14 are close to each other, the developing layer 151 and the photosensitive drum 14 are in contact.

[0168] In the longitudinal direction, at least a portion of the range extender 1114 is located outside the load-bearing area S. Specifically, at least a portion of the range extender 1114 is located to the left of the left end 151a, or at least a portion of the range extender 1114 is located to the right of the right end 151b.

[0169] In a specific embodiment, at least a portion of the contact position (contact point, contact surface or contact line) between the range extender 1114 and the action part is located outside the load-bearing area S. At this time, at least a portion of the contact position is located to the left of the left end 151a, or, in other words, at least a portion of the contact position is located to the right of the right end 151b.

[0170] Fig.31 An embodiment is given in which the action portion is arranged on the drum box 12 , the range extender 1114 is arranged on the bracket 1113 , and the action portion is the first middle portion 141 g . In some embodiments, the range extender 1114 may also be arranged on the first box body 111 .

[0171] When the developing cartridge 11 is mounted to the drum cartridge 12, the range extender 1114 is opposite to the first intermediate portion 141g, and the separating member 13 is moved before receiving the force F. Fig.32A As shown, the developing roller 15 and the photosensitive drum 14 are kept in contact / close to each other, the developing roller 15 rotates about the rotation axis L, the photosensitive drum 14 rotates about the rotation axis X, and the right end 151b contacts the photosensitive drum 14 at the contact point P1.

[0172] It should be noted that the range extender 1114 and the first middle portion 141g are relative to each other in the front-to-back direction, and the range extender 1114 faces the first middle portion 141g. There can be a gap between them, or they can just contact but no extrusion force is generated.

[0173] In the existing products, when the separation member 13 receives the force F, the developing roller 15 rotates along the direction indicated by r relative to the photosensitive drum 14 around the point P1 along with the developing box 11 as a whole. At the driving end, the developing roller 15 and the photosensitive drum 14 are separated from each other, or in other words, the left end 151a is separated from the photosensitive drum 14, but at least the right end 151b may still maintain contact with the photosensitive drum 14. When the developing box 11 is not used for a long time, the developing layer 151 may be deformed, at least at the position of the right end 151b, or the photosensitive drum 4 may be contaminated.

[0174] like Fig.32BAs shown, in the developer box 11 involved in this embodiment, along the longitudinal direction, at least a portion of the range extender 1114 is located to the right of the right end 151b, or in other words, at least a portion of the range extender 1114 is farther away from the left end 151a than the right end 151b, and when the separation member 13 receives force F, at the non-driving end, the range extender 1114 abuts against the first middle portion 141g at point P2 (an implementation of the contact position, when the range extender 1114 and the first middle portion 141g form a surface connection or a line connection, the midpoint of the surface or the line is taken), and point P1 is out of contact with the photosensitive drum 14.

[0175] To facilitate understanding of this plan, Fig.33 The figure shows a comparison of the angles formed between the developing roller 15 and the photosensitive drum 14 after the rotation axis L of the developing roller 15 moves relative to the rotation axis X of the photosensitive drum 14 during the separation process of the developing roller 15 and the photosensitive drum 14 in the existing developing box and the developing box involved in the present embodiment. In the figure, L1 represents the rotation axis of the developing roller in the existing developing box, and L2 represents the rotation axis of the developing roller in the developing box involved in the present embodiment.

[0176] When the separation member 13 receives the force F, in the existing developing box, the developing roller 15 / developing box 11 rotates around the point P1, and the angle formed between the rotation axis L1 of the developing roller 15 and the rotation axis X of the photosensitive drum 14 is a1. In the developing box involved in this embodiment, the developing roller 15 / developing box 11 rotates around the point P2, and the angle formed between the rotation axis L2 of the developing roller 15 and the rotation axis X of the photosensitive drum 14 is a2, and a2>a1.

[0177] It can be seen that in one embodiment, point P2 is located to the right of point P1, or in other words, point P2 is farther away from the driving end (the end where the separation member 13 is located, or the end of the separation member 13 for receiving force F) than point P1; on the contrary, when the separation member 13 is set at the non-driving end, or the separation member 13 receives force F at the non-driving end, point P2 will be located to the left of point P1, or in other words, point P2 is farther away from the non-driving end than point P1.

[0178] In one embodiment, both point P1 and point P2 are located in a plane passing through both the rotation axis L of the developing roller 15 and the rotation axis X of the photosensitive drum 14 , so that the movement trajectory of the developing roller 15 and the photosensitive drum 14 when they are separated will be more stable.

[0179] In one embodiment, in the plane, along a direction perpendicular to the longitudinal direction, point P2 is farther from the rotation axis X of the photosensitive drum 14 than point P1 , or in other words, point P2 is farther from the surface of the photosensitive drum 14 than point P1 .

[0180] Embodiment 11

[0181] Based on the inventive concept of embodiment 10, Fig.34As shown, the range extender 1114 in this embodiment is still arranged on the bracket 1113, and along the longitudinal direction, the range extender 1114 is still located outside the bearing area S, but when the developing box 11 is installed to the drum box 12, the range extender 1114 is directly opposite to the photosensitive drum 14, and therefore, the active part in this embodiment is the photosensitive drum 14.

[0182] The above-mentioned range extender 1114 is directly opposite to the photosensitive drum 14, which means that along the front-to-back direction, the range extender 1114 faces the photosensitive drum 14, and there can be a gap between them or they can be in a state of just contact but no squeezing force is generated.

[0183] In some embodiments, the range extender 1114 may also be disposed on the first box body 111 .

[0184] When the separation member 13 receives the force F, the developing roller 15 will rotate with the developing box 11 as a whole relative to the photosensitive drum 14, and the range extender 1114 will contact the photosensitive drum 14 at point P2. Similarly, along the longitudinal direction, since point P2 is located to the right of point P1, or in other words, point P2 is farther away from the driving end (the end where the separation member 13 is located, or the end of the separation member 13 for receiving the force F) than point P1; on the contrary, when the separation member 13 is set at the non-driving end, or the separation member 13 receives the force F at the non-driving end, point P2 will be located to the left of point P1, or in other words, point P2 is farther away from the non-driving end than point P1, and the developing roller 15 in this embodiment will be completely separated from the photosensitive drum 14.

[0185] In one embodiment, both point P1 and point P2 are located in a plane passing through both the rotation axis L of the developing roller 15 and the rotation axis X of the photosensitive drum 14 , so that the movement trajectory of the developing roller 15 and the photosensitive drum 14 when they are separated will be more stable.

[0186] In one embodiment, the developing layer 151 and the range extender 1114 are both in contact with the surface of the photosensitive drum 14 , so that in the plane, along a direction perpendicular to the longitudinal direction, the distance between point P2 and the rotation axis X is equal to the distance between point P1 and the rotation axis X.

[0187] In one embodiment, the developing layer 151 contacts the surface of the photosensitive drum 14 , but the range extender 1114 does not contact the photosensitive drum 14 , and the two are spaced apart from each other, which helps prevent the surface of the photosensitive drum 14 from being worn.

[0188] Example 12

[0189] Based on the inventive concept of embodiment 10, Fig.35As shown, the range extender 1114 in this embodiment is arranged on the bracket 1113 or the first box body 111. When the developing box 11 is installed to the drum box 12, the range extender 1114 is opposite to the second box body 121. Therefore, the action part 126 in this embodiment is a part of the second box body 121 itself.

[0190] The range extender 1114 and the second box body 121 are relative to each other in the front-to-back direction, and the range extender 1114 faces the second box body 121. There can be a gap between them, or they can just touch but no squeezing force is generated.

[0191] Along the longitudinal direction, the range extender 1114 is still located outside the bearing area S. When the separation member 13 receives the force F, the point P2 where the range extender 1114 abuts the action portion 126 is located to the right of point P1, or in other words, point P2 is farther away from the driving end (the end where the separation member 13 is located, or the end of the separation member 13 for receiving the force F) than point P1. On the contrary, when the separation member 13 is set at the non-driving end, or the separation member 13 receives the force F at the non-driving end, point P2 will be located to the left of point P1, or in other words, point P2 is farther away from the non-driving end than point P1, and the developing roller 15 in this embodiment will be completely separated from the photosensitive drum 14.

[0192] In one embodiment, both point P1 and point P2 are located in a plane passing through both the rotation axis L of the developing roller 15 and the rotation axis X of the photosensitive drum 14 , so that the movement trajectory of the developing roller 15 and the photosensitive drum 14 when they are separated will be more stable.

[0193] In one embodiment, in the plane, along a direction perpendicular to the longitudinal direction, point P2 is farther from the rotation axis X of the photosensitive drum 14 than point P1 , or in other words, point P2 is farther from the surface of the photosensitive drum 14 than point P1 .

[0194] In summary, in the plane, in the direction perpendicular to the longitudinal direction, the point P2 is not closer to the rotation axis X of the photosensitive drum 14 than the point P1 is.

[0195] As described above, in the developing boxes involved in Example 10, Example 11 and Example 12, by providing the range extender 1114, when the separation member 13 receives the force F, along the longitudinal direction, the left end 151a and the right end 151b are both out of contact with the photosensitive drum 14, and the distance at which the developing roller 15 and the photosensitive drum 14 are out of contact with each other at one end (driving end) of the developing box is different from the distance at which the developing roller 15 and the photosensitive drum 14 are out of contact with each other at the other end (non-driving end) of the developing box, and the distance at which the developing roller 15 and the photosensitive drum 14 are out of contact with each other can either gradually decrease from left to right or gradually increase from left to right, and even if the developing box 11 is not used for a long time, the developing layer 151 will not contact the photosensitive drum 14, and the developing roller 15 and the photosensitive drum 14 will not be damaged or contaminated.

[0196] Embodiment 13

[0197] This embodiment provides another separation member 13, such as Fig.36 , Fig.37 , Fig.38A and Fig.38B As shown, the separation member 13 includes a main body 1310, a force receiving member 131 and a force applying portion 1326. The main body 1310 is fixedly arranged relative to the first box body 111. The force receiving member 131 is connected to the main body 1310 and is used to receive the force F applied by the force applying member 1 of the electronic photographic imaging device. The force applying portion 1326 is also connected to the main body 1310. Through the force applying portion 1326, the force F is applied to the force-bearing portion outside the developing box 11, and then the force-bearing portion reacts to the force applying portion 1326, so that the first box body 111 moves relative to the drum box 12 / the second box body 121 / the photosensitive drum 14; the force-bearing portion can be, for example, the above-mentioned first abutting portion 1211 and the second abutting portion 1212 (such as Figure 5 It may be at least one of the components shown in the figure), and may also be other components arranged in the drum box 12 or components in the electronic photographic imaging device PM.

[0198] This embodiment will focus on the force receiving part being a component provided in the electrophotographic imaging device PM as an example for explanation. Fig.38A and Fig.38B The electronic photographic imaging device PM is also provided with a laser PM1 for emitting a laser beam carrying imaging information to the surface of the photosensitive drum 14. When the developing box 11 / processing box 100 is installed to a predetermined position of the electronic photographic imaging device PM, the laser PM1 is opposite to the photosensitive drum 14. In this way, the laser PM1 can emit a laser beam to the surface of the photosensitive drum 14, so that an electrostatic latent image is formed on the surface of the photosensitive drum 14. The force-bearing part is the laser PM1.

[0199] The force receiving member 131 is provided with a force receiving portion 1311 for receiving force F, and the force applying portion 1326 can be formed integrally with the force receiving portion 131 or separately, as long as the force applying portion 1326 can move in response to the movement of the force receiving portion 1311 relative to the drum box 12 / the second box body 121 / the photosensitive drum 14.

[0200] In some embodiments, the force receiving portion 1311 is a plane arranged on the force receiving member 131, and the plane is arranged so that when the force-applying member 1 begins to apply force F to the separation member 13, the plane is perpendicular to the direction of the force F. This ensures that the force F is more effectively applied to the plane, thereby improving the separation efficiency.

[0201] In some embodiments, the laser PM1 is configured to move with the movement of the door cover. For example, when the door cover is gradually closed, the laser PM1 moves toward the direction close to the photosensitive drum 14, and when the door cover is gradually opened, the laser PM1 moves toward the direction away from the photosensitive drum 14. The force applying member 1 has the following structure: Fig.37 The first position A, the second position B and the third position C are shown. In the first position A, the door cover is in an open state. In the second position B, the door cover is in a closed state, and the developing roller 15 and the photosensitive drum 14 are close to each other. In the third position C, the door cover is in a closed state, and the force-applying member 1 is about to start applying force F to the separation member 13.

[0202] The main body 1310, the force receiving member 131 and the force applying portion 1326 may be formed in one piece or in separate pieces, but the force applying portion 1326 is always formed to protrude from the main body 1310. Fig.37 As shown, when viewed along the longitudinal direction, the force applying portion 1326 protrudes from the first box body 111 .

[0203] In some embodiments, the force-applying portion 1326 has an arc-shaped force-applying surface 1329, which is beneficial to protecting the force-receiving portion and preventing the force-receiving portion from being damaged due to excessive concentration of force; the force-applying portion 1326 and the force-receiving portion will form a linear contact, and when observed along the longitudinal direction, the position where the force-applying portion 1326 / the force-applying surface 1329 abuts against the force-receiving portion will form an abutment point D, such as Fig.38A As shown, when the developing box 11 / processing box 100 is installed to a predetermined position of the imaging device, the force applying portion 1326 / force applying surface 1329 contacts the laser PM1 as the force receiving portion, so that the force F applied by the force applying member 1 can be more efficiently transmitted to the laser PM1.

[0204] In some embodiments, when the developing box 11 / processing box 100 is installed at a predetermined position of the imaging device, the force applying portion 1326 / force applying surface 1329 and the laser PM1 serving as the force receiving portion may not be in contact, and a gap between the two may be in the range of 0.1mm-10mm. In this way, when the laser PM1 moves toward the direction close to the photosensitive drum 14, interference between the laser PM1 and the force applying portion 1326 can be prevented.

[0205] As described above, when the force-applying member 1 applies force F to the separation member 13, the force-applying portion 1326 transmits the force F to the laser PM1, and then the laser PM1 applies a reaction force to the force-applying portion 1326. The reaction force forces the separation member 13 to drive the first box body 111 to move relative to the drum box 12 / the second box body 121 / the photosensitive drum 14, thereby causing the developing roller 15 and the photosensitive drum 14 to change from a state of being close to each other to a state of being separated from each other.

[0206] Specifically, in some embodiments, under the action of the reaction force, the first box body 111 moves around the abutment point D along the Fig.38B The developing roller 15 and the photosensitive drum 14 rotate in the direction indicated by r4, that is, the rear part of the contact point D moves upward, and the front part of the contact point D moves downward, the developing roller 15 and the photosensitive drum 14 are separated from each other, and a second gap g is formed between the two.

[0207] In some embodiments, under the action of the reaction force, in the first installation space 141e (such as Fig.22A and Fig. 22B As shown in the figure, the first box body 111 moves backward as a whole, and the developing roller 15 and the photosensitive drum 14 are separated from each other, forming a second gap g therebetween.

[0208] Thus, under the action of the reaction force, the first box body 111 is guided by the guide part outside the developing box, and can be rotated or slid, but ultimately the developing roller 15 and the photosensitive drum 14 can be separated from each other. The guide part can be, for example, the above-mentioned first installation space 141e, or it can be a guide space arranged in the imaging device. Specifically, the specific shape of the guide part should not be limited, and it can be either a straight line or a curved line.

[0209] In some embodiments, the force-applying surface 1329 extends in the longitudinal direction, so that the contact area between the force-applying surface 1329 and the force-bearing portion can be increased and the separation efficiency can be improved.

[0210] In some embodiments, a straight line passing through the abutment point D and parallel to the direction of the force F is set as the first auxiliary line m1, and a second auxiliary line m2 and a third auxiliary line m3 parallel to the first auxiliary line m1 are made along the front-to-back direction through the front end point and the rear end point of the developing box 11 respectively, a first area Q1 is formed between the first auxiliary line m1 and the second auxiliary line m2, and a second area Q2 is formed between the first auxiliary line m1 and the third auxiliary line m3, wherein the developing roller 15 is located in the first area Q1, and the force receiving portion 1311 is located in the second area Q2, and along the direction perpendicular to the direction of the force F (for example, the front-to-back direction), the length of the first area Q1 is n1, and the length of the second area Q2 is n2.

[0211] In some embodiments, n2>n1, so that the imaging device only needs to apply a small force F to make the developing roller 15 and the photosensitive drum 14 change from a state of being close to each other to a state of being separated from each other; Fig.38A As shown, along the front-to-back direction, the force receiving portion 1311, the force applying portion 1326 / the force applying surface 1329 / the contact point D, and the developing roller are arranged in sequence from back to front. Obviously, the closer the force receiving portion 1311 is to the third auxiliary line m3, the higher the separation efficiency of the developing roller 12 and the photosensitive drum 22 is.

[0212] In some embodiments, the separation member 13, the first box body 111 and the bracket 113 may be formed as three parts in one body, or any two parts may be formed as one body, or may be formed separately to become three independent parts.

[0213] As described above, when the developer cartridge 11 is installed to the drum cartridge 12, the pushing member in the drum cartridge 12 applies a pushing force to the pushing portion in the developer cartridge 11, so that the developer roller 15 and the photosensitive drum 14 can remain in a state close to each other. Therefore, under the action of the reaction force, when at least a portion of the first cartridge body 111 moves backward and causes the developer roller 15 and the photosensitive drum 14 to change from a state close to each other to a state separated from each other, the drum cartridge 12 may also move with the developer cartridge 11, which may cause the photosensitive drum 14 to deviate from the recording medium. For this reason, in some embodiments, the developer cartridge 11 further includes a drum cartridge limiting portion 136 for limiting the drum cartridge 12 from moving with the developer cartridge 11, and the drum cartridge limiting portion 136 can move with the movement of the first cartridge body 111, such as Fig.38A and Fig.38B As shown, under the action of the reaction force, when the first box body 111 rotates or slides so that the developing roller 15 and the photosensitive drum 14 change from a state of being close to each other to a state of being separated from each other, the drum box limiting portion 136 abuts against the drum box 12, so that the movement of the drum box 12 following the developing box 11 is restricted.

[0214] In some embodiments, a power transmission member 144 is also provided at the longitudinal end of the photosensitive drum 14. The power transmission member 144 receives power from the imaging device by electrically contacting the imaging device and supplies power to the photosensitive drum. When the drum box 12 is restricted by the drum box restriction portion 136, the power transmission member 144 will be able to maintain stable electrical contact with the imaging device.

[0215] In some embodiments, along the front-to-back direction, at least a portion of the developing roller 15 and at least a portion of the photosensitive drum 14 overlap with the force applying portion 1326, so that the size of the developing box 11 in the direction intersecting the front-to-back direction can be controlled. This design is conducive to the miniaturization of the developing box 11 / processing box 100.

[0216] In some embodiments, the separation member 13 may be disposed at least at one of the driving end and the non-driving end. When the separation member 13 is disposed only at one of the driving end and the non-driving end, under the action of the force F, the developing roller 15 and the photosensitive drum 14 may present the following Fig.32B In the state shown, when the force F is large enough, the developing roller 15 and the photosensitive drum 14 will be completely separated in the longitudinal direction.

[0217] In some embodiments, the force-bearing part may also be other components of the imaging device, for example, the force-bearing part is an upper cover, a side cover, etc. of the imaging device. The force-bearing part may also be a part of the drum box 12. For example, the force-bearing part is an extended protrusion extending from the second box body 121, and the force-applying part 1326 can abut against the extended protrusion.

[0218] When the developing box 11 moves relative to the drum box 12, so that the developing roller 15 and the photosensitive drum 14 change from a state of being close to each other to a state of being separated from each other, the chip 32 may move toward the contact pin 403, so that the contact pin 403 is further compressed by the chip 32. In the long run, not only may the contact pin 403 be irreversibly deformed, but the force exerted on the chip 32 by the contact pin 403 will also increase, thereby causing the electrical contact between the chip 32 and the contact pin 403 to become unstable and the chip 32 to be damaged. When the elastic member 33 is provided between the chip 32 and the chip frame 31, not only can the chip 32 and the contact pin 403 be maintained in a state of elastic electrical contact, but also the chip 32 can be moved in a direction away from the contact pin 403 during the movement of the first box body 111 relative to the second box body 121, so as to reduce the pressure exerted on the contact pin 403 by the chip 32. Conversely, the force exerted on the chip 32 can also be reduced, thereby extending the service life of the contact pin 403 and the chip 32.

[0219] Embodiment 14

[0220] like Fig.39As shown, the developing box 11 involved in this embodiment is still provided with a separation mechanism 13. Similarly, the separation mechanism 13 can be provided at least at one of the driving end and the non-driving end.

[0221] As described above, the developing box 11 and the drum box 12 are adapted, and the drum box 12 is provided with a box side force member 124. The specific structure of the box side force member 124 is as described above and will not be repeated here. Fig.40A When the central rotation axis L4 rotates in the direction indicated by r3, the force applying member 1 abuts against the first portion 124a, and the force F is applied to the first portion 124a. Fig.40A The middle rotation axis L3 rotates in the direction indicated by r2, and the second portion 124b pushes the separation member 13, thereby making the first box body 111 away from the photosensitive drum 14. The rotation axis L3 and the rotation axis L4 are parallel to the left and right directions. Fig.40B As shown, a second gap g is formed between the developing roller 15 and the photosensitive drum 14.

[0222] Continue as Fig.40A As shown, when observed in the longitudinal direction, the second part 124b is formed into a polygonal body, including a first side 124b1, a second side 124b2 and a third side 124b3, wherein two ends of the second side 124b2 are respectively connected to the first side 124b1 and the third side 124b3, the first side 124b1 and the second side 124b2 intersect at a first intersection D1, the second side 124b2 and the third side 124b3 intersect at a second intersection D2, and along the rotation direction r2 of the box side force applying member 124, the first intersection D1 is located downstream of the second intersection D2 / the second side 124b2.

[0223] In this embodiment, the separation member 13 includes a force receiving member 131 having a force receiving portion 1311, and the force receiving portion 1311 is configured as a plane at least partially facing forward. Fig.40A As shown, when the developing cartridge 11 is developing in the image forming apparatus, the developing roller 15 and the photosensitive drum 14 approach each other, and the plane as the force receiving portion 1311 is opposite to the first intersection D1.

[0224] In some embodiments, when the developing cartridge 11 is developing in the image forming apparatus, the force receiving portion 1311 may also be opposite to the second side 124b2.

[0225] like Fig.40BAs shown, when the developing box 11 does not need to be developed in the imaging device, the force-applying member 1 rotates around the rotation axis L4 in the direction indicated by r3, and then drives the box side force-applying member 124 / the second part 124b to rotate around the rotation axis L3 in the direction indicated by r2 until the force receiving portion 1311 is opposite to the second intersection D2. As the box side force-applying member 124 continues to rotate, the second part 124b pushes the force receiving member 131, so that the first box body 111 drives the developing roller 15 to move in the direction away from the photosensitive drum 14, and the state in which the developing roller 15 and the photosensitive drum 14 are close to each other is transformed into a state in which they are separated from each other, and a second gap g is formed between the two.

[0226] As described above, by setting the force receiving portion 1311 as a plane that at least partially faces the front, during the process of the second portion 124b rotating along the direction indicated by r2, the force receiving portion 1311 changes from being relative to the first intersection D1 to being relative to the second intersection D2 without having to completely cross the second intersection D2, so that the force receiving portion 1311 is opposite to the third side 124b3, which is beneficial to reducing the demand for the force F applied to the force-applying member 1, so that the developing roller 15 and the photosensitive drum 14 can more smoothly change from a state of being close to each other to a state of being separated from each other, that is, when the developing roller 15 and the photosensitive drum 14 are respectively in a state of being close to each other and a state of being separated from each other, the force receiving portion 1311 is respectively opposite to the two ends of the same surface of the box side force-applying member 124.

[0227] In some embodiments, when the developing roller 15 and the photosensitive drum 14 are respectively in a state of being close to each other and a state of being separated from each other, the force receiving portion 1311 may also be opposite to the first intersection D1 and the second intersection D2, but may be opposite to two different positions of the second side edge 124b2, respectively, and the two different positions are located between the first intersection D1 and the second intersection D2. Thus, the force receiving portion 1311 may also be regarded as being opposite to the two ends of the same surface of the box side force applying member 124, respectively.

[0228] It should be noted that when the developing roller 15 and the photosensitive drum 14 are in a state of being close to each other, the force receiving portion 1311 is opposite to the first intersection D1, and the force receiving portion 1311 is opposite to the second side 124b2, which should be understood as the force receiving portion 1311 and the first intersection D1 can be in a state of being in contact with each other or in a state of being spaced apart from each other; when the developing roller 15 and the photosensitive drum 14 are in a state of being separated from each other, the force receiving portion 1311 is opposite to the second intersection D2, and the force receiving portion 1311 is opposite to the second side 124b2, which should be understood as the force receiving portion 1311 and the second intersection D2 or the second side 124b2 are in contact with each other. In some embodiments, as Fig.39As shown, the developing box 11 also includes an end cover (right end cover) 110 arranged at the right end (non-driving end) of the first box body 111, and the end cover 110 is fixedly arranged relative to the first box body 111, and the separation member 13 is also fixedly arranged relative to the first box body 111. For example, the end cover 110 is fixedly installed on the first box body 111, and the separation member 13 is fixedly installed on at least one of the first box body 111 and the end cover 110.

[0229] In some embodiments, the developing box 11 also includes a powder filling port cover 1119a for sealing the powder filling port 111b, wherein the powder filling port 111b is used to allow the developer to be replenished into the first box body 111; the powder filling port cover 1119a includes a cover body 1119a1 and at least one of a locking portion 101 and a forced pushing portion (for example, a right forced pushing portion 1115R) provided on the cover body 1119a1, wherein the locking portion 101 is used to cooperate with the locking member in the drum box 12, so that the developing box 11 is locked in the drum box 12, and the right forced pushing portion 1115R is forced to push by the right forced pushing member 123R, so that the developing roller 15 and the photosensitive drum 14 are maintained in a state close to each other.

[0230] In some embodiments, in order to make the developing box 11 more smoothly installed on the drum box 12, or more smoothly removed from the drum box 12, the drum box 12 is also provided with an auxiliary mounting member (not shown) such as a rotating wheel. Accordingly, the developing box 11 is provided with a matching mounting member for matching with the auxiliary mounting member, such as Fig.41 As shown, the mating mounting member includes at least one of a left auxiliary member 1117e provided on the end cover 1117 and a right auxiliary member 1101 provided on the end cover 110. During the installation and removal of the developing box 11 in the drum box 12, the left auxiliary member 1117e and the right auxiliary member 1101 both cooperate with the auxiliary mounting member; specifically, the left auxiliary member 1117e and the right auxiliary member 1101 are configured as protrusions or ribs, and the left auxiliary member 1117e and the right auxiliary member 1101 respectively cooperate with the rotating wheel. Due to the rolling action of the rotating wheel, the developing box 11 can be more smoothly installed on the drum box 12, or the developing box 11 can be more smoothly removed from the drum box 12.

[0231] In some embodiments, at least a portion of the force receiving portion 1311 faces forward, and preferably, the force receiving portion 1311 is parallel to the longitudinal direction.

[0232] In some embodiments, the direction in which the force receiving portion 1311 faces is not parallel to the line L0 connecting the center of the developing roller 15 and the center of the photosensitive drum 14 , as long as the force receiving portion 1311 can receive the force F.

[0233] In some embodiments, the direction in which the force receiving portion 1311 faces is perpendicular to a line L0 connecting the center of the developing roller 15 and the center of the photosensitive drum 14 , so that the force F required by the force receiving portion 1311 is minimal.

[0234] Embodiment 15

[0235] Based on Embodiment 6 and Embodiment 9, this embodiment continues to optimize the structure of the separation component 13.

[0236] First refer to Fig.43A As shown, the force-applying member 1 is configured as a cylinder, and one end of the force-applying member 1 for applying a force F to the separation member 13 has a corner portion 1a, and the end surface 1b of the force-applying member is adjacent to the corner portion 1a. On the one hand, in the process of the developing roller 15 and the photosensitive drum 14 separating from each other and approaching each other for many times, the separation member 13 will continuously rub against the corner portion 1a, which may cause the separation member 13 to be worn, resulting in a reduction in the force F applied by the force-applying member 1 to the separation member 13, and finally, the developing roller 15 and the photosensitive drum 14 fail to separate from each other; on the other hand, in the existing scheme, the separation member 13 abuts against the force receiving portion 1311 through the corner portion 1a to keep the developing roller 15 and the photosensitive drum 14 separated from each other. However, after the corner portion 1a abuts against the force receiving portion 1311 for a long time, scratches may appear on the force receiving portion 1311, which may cause the separation of the developing roller 15 and the photosensitive drum 14 to be unclear after the force-applying member 1 applies a separation force to the separation member 13.

[0237] like Fig.42 As shown, the force receiving portion 1311 in this embodiment includes a first surface 1311a, a second surface 1311b and a third surface 1311c, wherein the third surface 1311c is located between the first surface 1311a and the second surface 1311b, and along the longitudinal direction, the second surface 1311b is farther away from the first box body 111 than at least a portion of the first surface 1311a, and when the developing roller 15 and the photosensitive drum 14 are in a state of being close to each other, along the longitudinal direction, the force member 1 is opposite to the first surface 1311a, and when the developing roller 15 and the photosensitive drum 14 are in a state of being separated from each other, along the longitudinal direction, the force member 1 is opposite to the second surface 1311b, and the end surface 1b of the force member abuts against the second surface 1311b.

[0238] In some embodiments, the third surface 1311 c is configured to be non-planar, so that the force-applying member 1 can more smoothly move from a state opposite to the first surface 1311 a to a state opposite to the second surface 1311 b .

[0239] In some embodiments, the first surface 1311a is configured to be a curved surface, and the two ends of the first surface 1311a in the lateral direction (the front end and the rear end that are spaced apart from each other) have different distances from the first box body 111 in the longitudinal direction. Specifically, the distance between the front end of the first surface 1311a and the first box body 111 in the longitudinal direction is greater than the distance between the rear end of the first surface 1311a and the first box body 111 in the longitudinal direction, and the front end and the rear end are spaced apart from each other. In the process of the developing roller 15 and the photosensitive drum 14 changing from a state of separation to a state of proximity, this design can prevent the first surface 1311a from interfering with the force member 1, thereby avoiding the contact between the force member 1 and the first surface 1311a affecting the normal contact between the developing roller 15 and the photosensitive drum 14 during the imaging process.

[0240] In some embodiments, continuing as Fig.42 As shown, along the vertical direction, the first surface 1311a has an upper end 1311d and a lower end 1311e spaced apart from each other, and along the longitudinal direction, the distance from the upper end 1311d to the first box body 111 is smaller than the distance from the lower end 1311e to the first box body 111, thereby further preventing the first surface 1311a from interfering with the force-applying member 1 during the process of the developing roller 15 and the photosensitive drum 14 transitioning from a mutually separated state to a mutually close state.

[0241] like Fig.43A As shown, when the developing roller 15 and the photosensitive drum 14 are in a state of being close to each other, the force member 1 / corner portion 1a is opposite to the first surface 1311a, and the corner portion 1a can be spaced apart from the first surface 1311a or can be in contact with each other; as shown in FIG. Fig.43B As shown, as the force-applying member 1 gradually moves forward, the corner portion 1a and the first surface 1311a are squeezed against each other, and through the force-applying member 1, the first box body 111 moves to the left along the longitudinal direction, the right squeezing surface 1327R abuts against the first abutting portion 1211, the first box body 111 moves backward, and the developing roller 15 and the photosensitive drum 14 gradually separate from each other.

[0242] As described above, since the third surface 1311c is set as a non-planar surface, the force member 1 can smoothly cross the third surface 1311c from the first surface 1311a, and the developing roller 15 and the photosensitive drum 14 are separated from each other. Finally, the end surface 1b of the force member is opposite to the second surface 1311b in the longitudinal direction, and the first box body 111 is maintained at a position away from the photosensitive drum 14. Accordingly, the developing roller 15 and the photosensitive drum 14 are maintained in a state of separation from each other.

[0243] In some embodiments, the second surface 1311b is configured as a plane matching the end surface 1b of the force-applying member, so that the developing roller 15 and the photosensitive drum 14 can be more stably maintained in a state of separation from each other. At the same time, it can also prevent scratches on the force receiving portion 1311, so that the developing roller 15 and the photosensitive drum 14 can be maintained in an effective state of separation from each other.

[0244] In some embodiments, the first surface 1311a can also be set as a slope inclined relative to the longitudinal direction. Preferably, the distance between the front end of the first surface 1311a and the first box body 111 in the longitudinal direction is greater than the distance between the rear end of the first surface 1311a and the first box body 111 in the longitudinal direction.

Claims

1. A developing cartridge detachably mounted to a drum cartridge, wherein the drum cartridge is detachably mounted to an electrophotographic imaging device provided with a force applying member, wherein the developing cartridge comprises a first cartridge body and a developing roller rotatably disposed in the first cartridge body, and the drum cartridge comprises a second cartridge body and a photosensitive drum rotatably disposed in the second cartridge body; The developing roller and the photosensitive drum can be switched between a state of contact with each other and a state of separation from each other, wherein the developing cartridge performs imaging in the state of contact with each other and the developing cartridge does not perform imaging in the state of separation from each other; Features: The developing box also includes, A separation member is configured such that one longitudinal end of the developing cartridge directly or indirectly receives the force applied by the force applying member through the separation member, and the other longitudinal end does not directly receive the force applied by the force applying member, thereby forcing the developing roller and the photosensitive drum to change from the state of mutual contact to the state of mutual separation; The developing roller and the photosensitive drum are separated from each other at both longitudinal end portions of the developing cartridge along the longitudinal direction of the developing cartridge.

2. The developing cartridge according to claim 1, characterized in that: After receiving the force applied by the force applying member, the separating member contacts with the drum box or components in the imaging device, so that the first box body moves in a direction away from the photosensitive drum, and the developing roller and the photosensitive drum are separated from each other.

3. The developing cartridge according to claim 2, characterized in that: The separation member is arranged on the first box body, and the separation member comprises a force receiving member and a force applying portion; The force receiving member is disposed at one longitudinal end of the developing cartridge, and is used to contact the force applying member and to move relative to the photosensitive drum under the action of the force applying member; The force applying portion includes a first force applying portion provided at the one longitudinal end portion and a second force applying portion provided at the other longitudinal end portion, and the first force applying portion and the second force applying portion move relative to the photosensitive drum in response to movement of the force receiving member.

4. The developing cartridge according to claim 3, characterized in that: The force applying member further includes a connecting portion extending between two longitudinal ends of the developing cartridge, the first force applying portion and the second force applying portion are respectively arranged at two ends of the connecting portion, and the first force applying portion transmits the force received by the force receiving member to the second force applying portion through the connecting portion; The first force applying portion and the second force applying portion are both in contact with the second box body, so that the developing roller and the photosensitive drum are separated from each other.

5. The developing cartridge according to claim 5, characterized in that: The force receiving member and the connecting part are separately arranged, the force receiving member comprises a force receiving part, an active part and a guiding part, and the connecting part is provided with a driven part; The force receiving portion is used to abut against the force applying member to receive the force, the guiding portion is used to guide the movement of the force receiving member, and the active portion is used to drive the driven portion.

6. The developing cartridge according to claim 5, characterized in that: The force receiving member and the connecting portion are integrally arranged, and the force receiving member has a force receiving portion for receiving the force applied by the force applying member, and the first force applying portion and the force receiving portion are arranged at the same end of the developing box, and an angle is formed therebetween.

7. The developing cartridge according to claim 5, characterized in that: The force receiving member and the connecting portion are separately provided, and the force receiving member is provided to rotate about an axis parallel to the longitudinal direction of the developing cartridge.

8. The developing cartridge according to claim 4, characterized in that: When the first urging portion receives the force applied by the urging member, the developing cartridge as a whole moves in the longitudinal direction, the developing cartridge moves relative to the photosensitive drum, and the developing roller and the photosensitive drum are separated from each other.

9. The developing cartridge according to claim 8, characterized in that: The drum box further comprises a first supporting member and a second supporting member arranged on the second box body, and the photosensitive drum is supported by the first supporting member and the second supporting member; When the first force applying portion receives the force applied by the force applying member, the second force applying portion abuts against the first support member.

10. The developing cartridge according to claim 4, characterized in that: The second force applying portion is provided with a pressing surface, and the pressing surface is arranged so that a distance between the pressing surface and the rotation axis of the developing roller in a direction perpendicular to the rotation axis gradually decreases from the one longitudinal end portion to the other longitudinal end portion.

11. The developing cartridge according to claim 4, characterized in that: The imaging device further comprises a guide rail for guiding the developer cartridge to be installed or removed, and the second force applying portion abuts against the guide rail to move the developer cartridge relative to the photosensitive drum, so that the developer roller and the photosensitive drum are separated from each other.

12. The developing cartridge according to claim 2, characterized in that: The separation member includes a main body, a force receiving member and a force applying portion; The main body is fixedly arranged relative to the first box body; The force receiving member is connected to the main body and is used to receive the force applied by the force applying member; The force-applying part is connected to the main body, through which the force is applied to the force-receiving part outside the developing box, and then the force-receiving part reacts to the force-applying part, so that the first box body moves relative to the photosensitive drum, and the developing roller and the photosensitive drum are separated from each other.

13. The developing cartridge according to claim 1, wherein: The developing box further includes an extending member for contacting with an acting portion outside the developing box, and the extending member and the separating member are arranged on different sides along the longitudinal direction of the developing box.

14. The developing cartridge according to any one of claims 1 to 13, characterized in that: The drum cartridge is provided with a first part, a second part and a third part, wherein the first part and the second part are both connected to the third part, the first part is used to receive the force applied by the force applying member so that the cartridge side force applying member rotates around the third part in the direction r2, and the second part is used to transmit the force to the separation member; The second portion includes a first side, a second side and a third side, wherein two ends of the second side are respectively connected to the first side and the third side, the first side intersects with the second side at a first intersection D1, the second side intersects with the third side at a second intersection D2, and along the rotation direction r2, the first intersection D1 is located downstream of the second intersection D2; When the developing roller and the photosensitive drum are in contact with each other, the portion of the force receiving member for receiving the force is opposite to the first intersection D1; When the developing roller and the photosensitive drum are in a state of being separated from each other, a portion of the force receiving member for receiving the force is opposed to the second intersection D2.

15. The developing cartridge according to any one of claims 1 to 13, characterized in that: The drum cartridge is provided with a first part, a second part and a third part, wherein the first part and the second part are both connected to the third part, the first part is used to receive the force applied by the force applying member so that the cartridge side force applying member rotates around the third part in the direction r2, and the second part is used to transmit the force to the separation member; The second portion includes a first side, a second side and a third side, wherein two ends of the second side are respectively connected to the first side and the third side, the first side intersects with the second side at a first intersection D1, the second side intersects with the third side at a second intersection D2, and along the rotation direction r2, the first intersection D1 is located downstream of the second intersection D2; When the developing roller and the photosensitive drum are respectively in a state of being close to each other and a state of being separated from each other, the portion of the force receiving member for receiving the force is respectively opposite to two different positions of the second side, and the two different positions are located between the first intersection D1 and the second intersection D2.

16. The developing cartridge according to any one of claims 1 to 13, characterized in that: The separation member includes a first surface, a second surface and a third surface, wherein the third surface is located between the first surface and the second surface, and along the longitudinal direction of the developing cartridge, the second surface is farther from the first cartridge body than at least a portion of the first surface; When the developing roller and the photosensitive drum are in contact with each other, the urging member is opposed to the first surface along the longitudinal direction of the developing cartridge; When the developing roller and the photosensitive drum are in a state of being separated from each other, the urging member is opposed to the second surface in the longitudinal direction of the developing cartridge, and a distal end surface of the urging member abuts against the second surface.

Images