Developing cartridge

Abstract

The utility model provides a developing box detachably mounted on a drum box, the drum box comprises a frame, a photosensitive drum, a positioning groove and a forced pushing part, the frame is provided with an accommodating groove for accommodating the developing box, and the photosensitive drum is rotatably arranged in the frame; the developing cartridge includes: a housing; a driving force receiver configured to receive a driving force from the image forming apparatus; a developing roller driven by the driving force from the driving force receiving member to rotate about a rotation axis parallel to the first direction; the adaptive assembly enables the developing box to be adaptive to different drum boxes; the positioning groove is used for positioning the developing box in a third direction, and the forcible pushing part is used for forcibly pushing the developing box, so that the developing roller is in contact with the photosensitive drum; according to the different drum boxes, in the different drum boxes, at least one of the size of the positioning groove in the third direction and the size of the forced pushing part and the photosensitive drum in the second direction is different, the developing box can be matched with the different drum boxes, and the production cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of electrophotographic imaging, and more particularly to a developing cartridge for use in electrophotographic imaging equipment. Background Technology

[0002] A developer cartridge is a container for holding toner. It can be detachably installed into imaging devices such as laser printers / copiers, either directly or indirectly. Existing developer cartridges need to be installed into a drum housing containing a photosensitive drum first, and then the whole assembly of the developer cartridge and drum housing is detachably installed into the imaging device.

[0003] Generally, original equipment manufacturers (OEMs) of developer cartridges and drum cartridges will differentiate the model numbers of developer cartridges and drum cartridges in the same series to correspond to different sales regions. However, in reality, the basic structure of developer cartridges in different sales regions is the same, with only a few structural differences.

[0004] For compatible manufacturers of developer cartridges and drum cartridges, the wide variety of developer cartridges and drum cartridges not only leads to the duplication of production molds, but also increases the difficulty of warehousing management, ultimately resulting in high costs for both developer cartridges and drum cartridges. Utility Model Content

[0005] In view of this, the present invention provides a developing cartridge employing the following technical solution to at least reduce the cost of the developing cartridge, specifically as follows:

[0006] A developing cartridge is detachably mounted to a drum cartridge, the developing cartridge and the drum cartridge being detachably mounted together to an imaging device; the drum cartridge includes a frame, a photosensitive drum, a positioning groove, and a pusher, the frame forming a receiving groove for accommodating the developing cartridge, the photosensitive drum being rotatably disposed within the frame; the developing cartridge includes: a housing for accommodating toner; a drive force receiver for receiving drive force from the imaging device; a developing roller for carrying toner and supplying toner to the photosensitive drum, the developing roller being driven by the drive force from the drive force receiver to rotate about a rotation axis parallel to a first direction; an adapter component enabling the developing cartridge to adapt to different drum cartridges; wherein, the direction intersecting the first direction is a second direction, along which the developing roller is exposed forward, and the direction intersecting the first and second directions is a third direction, the positioning groove for positioning the developing cartridge in the third direction, and the pusher for pushing the developing cartridge so that the developing roller and the photosensitive drum remain in contact; the different drum cartridges refer to those in which at least one of the dimensions of the positioning groove in the third direction and the dimensions of the pusher and the photosensitive drum in the second direction are different.

[0007] In some embodiments, the adapter component includes a first adapter and a second adapter, both of which are movable relative to the housing, with the first adapter positioned in front of the second adapter along a second direction.

[0008] In some implementations, the first adapter is configured to be rotatable relative to the housing.

[0009] In some embodiments, the first adapter includes a first movable member and a first elastic member, wherein the first movable member is configured to move relative to the housing between a first position and a second position. In the first position, the first movable member can engage with a first positioning groove, and in the second position, the first movable member can engage with a second positioning groove. In a third direction, the size of the second positioning groove is larger than the size of the first positioning groove. The first elastic member is used to push the first movable member toward the second position.

[0010] In some embodiments, the first movable member is cam-shaped and includes a first abutting portion, a second abutting portion, a third abutting portion, and a fourth abutting portion, wherein the first abutting portion and the second abutting portion are disposed opposite to each other, the third abutting portion and the fourth abutting portion are disposed opposite to each other, and the maximum distance between the first abutting portion and the second abutting portion is greater than the maximum distance between the third abutting portion and the fourth abutting portion; in a first position, the third abutting portion and the fourth abutting portion are arranged along a third direction, and in a second position, the first abutting portion and the second abutting portion are arranged along a third direction.

[0011] In some embodiments, the first adapter also includes a first support shaft for supporting the first movable member, which is disposed closer to the second abutment than the first abutment portion.

[0012] In some implementations, the first adapter is configured to slide relative to the housing.

[0013] In some embodiments, the second adapter includes a second movable member and a second elastic member. The second movable member is configured to move relative to the housing between a third position and a fourth position. In the third position, the second movable member can engage with a first type of pusher. In the fourth position, the second movable member can engage with a second type of pusher, which is further away from the photosensitive drum than the first type of pusher along a second direction. The second elastic member is used to push the second movable member toward the fourth position.

[0014] In some embodiments, the developing cartridge further includes an end cap, an extension, and a limiting portion. The end cap is fixedly connected to the housing, and a drive force receiving member is exposed through the end cap. The extension is connected to the end cap or the housing. The limiting portion is disposed on the extension and is movable relative to the housing. The limiting portion is used to abut against a second movable member, such that the second movable member is held in a third or fourth position.

[0015] In some implementations, the second adapter is configured to slide relative to the housing. Attached Figure Description

[0016] Figure 1A and Figure 1B This is a perspective view of the developing cartridge involved in Embodiment 1 of this utility model.

[0017] Figure 2 This is an exploded view of the end cap of the developing cartridge and the first adapter after separation, according to Embodiment 1 of this utility model.

[0018] Figure 3 This is a side view of the developing cartridge in the first embodiment of the present invention, viewed along the first direction when it is installed toward the drum cartridge.

[0019] Figure 4 This is an exploded view of the developing cartridge housing and the second adapter after separation, according to Embodiment 1 of this utility model.

[0020] Figure 5 This is an exploded view of the developing cartridge housing and the first adapter after separation, according to Embodiment 2 of this utility model.

[0021] Figure 6 This is an exploded view of the developing cartridge housing and the second adapter according to Embodiment 2 of this utility model after separation. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0023] [Example 1]

[0024] Figure 1A and Figure 1B This is a perspective view of the developing cartridge according to Embodiment 1 of this utility model; Figure 2 This is an exploded view of the end cap of the developing cartridge and the first adapter after separation according to Embodiment 1 of this utility model; Figure 3 This is a side view of the developing cartridge as it is installed toward the drum cartridge according to Embodiment 1 of this utility model, viewed along the first direction. Figure 4 This is an exploded view of the developing cartridge housing and the second adapter after separation, according to Embodiment 1 of this utility model.

[0025] The developing cartridge 100 can be detachably installed into an imaging device equipped with a drive force output element, either directly or indirectly. For example, the developing cartridge 100 can be directly and detachably installed into the imaging device, or the developing cartridge 100 can be detachably installed into a photosensitive drum 202 (e.g., ...). Figure 3 The drum box 200 (shown) is combined with the developing box 100 to form a processing box, and then the processing box is detachably installed into the imaging device.

[0026] The following description takes the example of the developing cartridge 100 being installed into the drum cartridge 200. The developing cartridge 100 includes a housing 1, a developing roller 2, an end cap 3, a driving force receiver 4, and an adapter assembly. The housing 1 has a cavity for containing toner. The developing roller 2 is rotatably disposed in the housing 1 to carry toner and supply toner to the photosensitive drum 202 in the drum cartridge 200. The end cap 3 includes an end cap body 31 fixedly connected to the housing 1 and a through hole 32 disposed on the end cap body 31. The driving force receiver 4 is disposed at one end of the developing cartridge 100 and exposed from the end cap through hole 32 to receive driving force from the imaging device. The developing roller 2 is driven by the driving force from the driving force receiver 4 to rotate around the rotation axis L.

[0027] For ease of description and understanding, the direction parallel to the rotation axis L is defined as the first direction. The end where the driving force receiving element 4 is located is the left end / driving end, and the opposite end is the right end / non-driving end. The direction intersecting the first direction is the second direction. Along the second direction, the developing roller 2 is exposed forward. The direction opposite to the forward direction is the rearward direction. The direction intersecting both the first and second directions is the third direction. Figure 1A As shown, along a third direction, the developing cartridge 100 has an upper and lower section as illustrated, and preferably, the first direction, the second direction, and the third direction are perpendicular to each other.

[0028] Continue as Figure 1A and Figure 1B As shown, the developing cartridge 100 also includes a handle 11 connected to the housing 1. The developing roller 2 and the handle 11 are arranged along a second direction, wherein the developing roller 2 is located in front of the handle 11.

[0029] like Figure 3 As shown, the drum cartridge 200 includes a frame 201, a photosensitive drum 202, positioning grooves 203, and a pushing part 205. The frame 201 has a receiving part 204 for accommodating the developing cartridge 100. The photosensitive drum 202 is rotatably disposed in the frame 201. Along a first direction, two positioning grooves 203 are spaced apart on the frame 201, and the positioning grooves 203 are used to position the developing cartridge 100 in a third direction. Along the first direction, two pushing parts 205 are spaced apart on the frame 201 for pushing the developing cartridge in a second direction. Preferably, the pushing parts 205 are configured to be movable relative to the frame 201.

[0030] The positioning groove 203 has a rearward-facing inlet 203c and upper sidewalls 203a and lower sidewalls 203b spaced apart in a third direction. An adapter space 203d for accommodating at least a portion of the adapter component is formed between the upper sidewalls 203a and lower sidewalls 203b. In the second direction, the upper sidewall 203a also has an abutment point P located at its rear end.

[0031] When the developing cartridge 100 is installed into the drum cassette 200, along the third direction, the adapter component cooperates with the positioning groove 203 and the pushing part 205 respectively, so that the developing cartridge 100 can be stably positioned in the receiving part 204. Along the second direction, the pushing part 205 pushes the developing cartridge 100 toward the photosensitive drum 202, so that the developing roller 2 and the photosensitive drum 202 remain in contact. Along the third direction, the tendency of the developing cartridge 100 to move upward is stopped by the receiving groove 203.

[0032] (Adaptation Components)

[0033] like Figure 1A and Figure 1B As shown, the adapter component includes a first adapter 5 and a second adapter 6. The first adapter 5 is used to cooperate with the receiving groove 203, and the second adapter 6 is used to cooperate with the pushing part 205. Along the second direction, the first adapter 5 is located in front of the second adapter 6. The structures of the two positioning grooves 203 and the two pushing parts 205 are the same. Therefore, there are two of each of the first adapter 5 and the second adapter 6. The following description takes the positioning groove 203 and the pushing part 205 provided at the drive end and the first adapter 5 and the second adapter 6 provided at the drive end as examples.

[0034] like Figure 2 As shown, the first adapter 5 includes a first movable member 51 and a first elastic member 52. The first movable member 51 is configured to move relative to the housing 1 between a first position and a second position. In the first position, the first movable member 51 can engage with a first positioning groove, and in the second position, the first movable member 51 can engage with a second positioning groove. The structures of the first and second positioning grooves are basically the same, except that the size of the second positioning groove is larger than the size of the first positioning groove along a third direction. The first elastic member 52 is used to push the first movable member 51 toward the second position.

[0035] In this embodiment, the first movable member 51 is configured to be rotatable relative to the housing 1. The first support shaft 53 for supporting the first movable member 51 can be disposed on the end cover 3 or on the housing 1. The first movable member 51 is generally cam-shaped and includes a first abutting part 511, a second abutting part 512, a third abutting part 513 and a fourth abutting part 514. The first abutting part 511 and the second abutting part 512 are arranged opposite to each other, and the third abutting part 513 and the fourth abutting part 514 are arranged opposite to each other. The maximum distance between the first abutting part 511 and the second abutting part 512 is greater than the maximum distance between the third abutting part 513 and the fourth abutting part 514. Therefore, in the first position, the third abutting part 513 and the fourth abutting part 514 are arranged along a third direction, and in the second position, the first abutting part 511 and the second abutting part 512 are arranged along a third direction.

[0036] When the developing cartridge 100 is installed toward the drum cassette 200 having the first positioning groove, at the inlet 203c, the contact point P abuts against the first movable member 51. As the developing cartridge 100 continues to be installed, the first movable member 51 overcomes the elastic force of the first elastic member 52, causing the first movable member 51 to rotate from the second position to the first position. The first movable member 51 enters the fitting space 203d, the third contact part 513 abuts against the upper side wall 203a, and the fourth contact part 514 abuts against the lower side wall 203b. The developing cartridge 100 can be stably positioned in the third direction.

[0037] When the developing cartridge 100 is installed toward the drum cassette 200 having the second positioning groove, even at the inlet 203c, the contact point P abuts against the first movable member 51, causing the first movable member 51 to rotate from the second position to the first position. However, since the size of the second positioning groove in the third direction is larger than that of the first positioning groove in the third direction, after the first movable member 51 disengages from the contact point P, the first elastic member 51 will force the first movable member 51 to return to the second position. Finally, in the fitting space 203d, the first abutting part 511 of the first movable member 51 abuts against the upper sidewall 203a, and the second abutting part 512 abuts against the lower sidewall 203b, so that the developing cartridge 100 can be stably positioned in the third direction.

[0038] like Figure 4 As shown, the second adapter 6 includes a second movable member 61 and a second elastic member 62. The second movable member 61 is configured to move relative to the housing 1 between a third position and a fourth position. In the third position, the second movable member 61 can cooperate with a first type of pushing part, and in the fourth position, the second movable member 61 can cooperate with a second type of pushing part. The structures of the first type of pushing part and the second type of pushing part are basically the same, except that, along the second direction, the second type of pushing part is further away from the photosensitive drum 202 than the first type of pushing part. The second elastic member 62 is used to push the second movable member 61 toward the fourth position.

[0039] In this embodiment, the second movable member 61 is configured to be rotatable relative to the housing 1. The second support shaft 64 for supporting the second movable member 61 can be disposed on the end cap 3 or on the housing 1. When the second movable member 61 is in the fourth position, the second movable member 61 is projected onto a plane perpendicular to the first direction. The projection of the second movable member 61 is rectangular, with its long side extending approximately along the second direction for a length of d1, and its short side extending approximately along the third direction for a length of d2. It can be seen that the developing cartridge 100 is rotatable relative to the housing 1 when the second movable member 61 is in the fourth position. The second dimension in the fourth position will be greater than the second dimension in the second direction of the developing cartridge 100 when the second movable member 61 is in the third position. This makes it possible that when the developing cartridge 100 is installed into the drum cassette 200 with the second type of pusher, although the second type of pusher is farther away from the photosensitive drum 202 than the first type of pusher, the size of the developing cartridge 100 in the second direction increases through the second movable member 61. Therefore, the second movable member 62 can still abut against the second type of pusher in the second direction, and the developing roller 2 can be forced to maintain contact with the photosensitive drum 202.

[0040] When the developing cartridge 100 is installed into the drum cassette 200 having the first type of pushing part, during the installation process of the developing cartridge 100, along the third direction, the second movable member 61 will abut against the first type of pushing part. The second movable member 61 overcomes the elastic force of the second elastic member 62 and moves from the fourth position to the third position. Finally, the second movable member 61 and the first type of pushing part abut against each other in the second direction, and the developing roller 2 can be forced to maintain contact with the photosensitive drum 202.

[0041] Continue as Figure 4 As shown, the adapter also includes an extension 63 connected to the end cap 3 or the housing 1 and a limiting part 631 provided on the extension 63. The limiting part 631 is configured to be movable relative to the housing 1. Preferably, the limiting part 631 is a cantilever provided on the extension 63. By the contact between the limiting part 631 and the second movable member 61, the second movable member 61 can be held more stably in the fourth position.

[0042] Furthermore, the limiting part 631 is provided with a guide slope 632. When the second movable member 61 is in the fourth position, the guide slope 632 faces the second movable member 61. As described above, during the process of installing the developing cartridge 100 into the drum cartridge 200 with the first type of pushing part, the second movable member 61 abuts against the first type of pushing part and overcomes the elastic force of the second elastic member 62 to move from the fourth position to the third position. With the guide slope 632 provided, the second movable member 61 can force the limiting part 631 to move relative to the housing 1, thereby allowing the second movable member 61 to smoothly pass over the limiting part 631. After the second movable member 61 passes over the limiting part 631, the limiting part 631 resets, thereby allowing the second movable member 61 to be restricted again by the limiting part 631 and held in the third position.

[0043] Based on the inventive concept of this utility model, the rotation axis of the first movable member 51 can be parallel to any one of the first direction, the second direction, and the third direction, or intersect with any one of the three directions. Similarly, the rotation axis of the second movable member 61 can also be parallel to any one of the first direction, the second direction, and the third direction, or intersect with any one of the three directions.

[0044] In some implementations, the movement can also be a linear sliding motion. For example, the first movable member 51 is configured to slide along any one of the first direction, the second direction, and the third direction, and the second movable member 61 is configured to slide along any one of the first direction, the second direction, and the third direction.

[0045] In some embodiments, the rotation axis of the first movable member 51 coincides with the rotation axis L of the developing roller 2. However, based on the inventive concept of this utility model, the rotation axis of the first movable member 51 may also be parallel to or intersect with the rotation axis L of the developing roller 2.

[0046] [Example 2]

[0047] Example 1 describes how the developing cartridge 100 can automatically adapt to different drum cartridges 200 by setting the adapter component, wherein at least one of the dimensions of the positioning groove 203 in the third direction and the dimensions of the push part 205 and the photosensitive drum 202 in the second direction are different.

[0048] This embodiment provides another adapter component, which allows the developing cartridge 100 to be adapted to different drum cartridges 200 by manual adjustment.

[0049] Figure 5 This is an exploded view of the developing cartridge housing after separation from the first adapter according to Embodiment 2 of this utility model; Figure 6 This is an exploded view of the developing cartridge housing and the second adapter according to Embodiment 2 of this utility model after separation.

[0050] like Figure 5 As shown, the developing cartridge 100 also includes positioning protrusions. Along the first direction, the left positioning protrusion 33L protrudes from the housing 1, and the right positioning protrusion 33R protrudes from the housing 1. Preferably, the left positioning protrusion 33L extends to the left from the end cap body 31. Along the third direction, the dimensions of the left positioning protrusion 33L and the right positioning protrusion 33R are adapted to the drum cartridge 200 with the first positioning groove.

[0051] In this embodiment, the first adapter 5 is detachably connected to the left positioning protrusion 33L and the right positioning protrusion 33R. When the developing cartridge 100 needs to be installed into the drum cartridge with the second positioning groove, the first adapter 5 is manually installed into the left positioning protrusion 33L and the right positioning protrusion 33R. Therefore, the first adapter 5 will form a new left positioning protrusion and a new right positioning protrusion with the left positioning protrusion 33L and the right positioning protrusion 33R respectively. The new left positioning protrusion and the new right positioning protrusion will be able to fit into the drum cartridge 200 with the second positioning groove, and the new left positioning protrusion and the new right positioning protrusion are not movable relative to the housing 1.

[0052] like Figure 6 As shown, in this embodiment, the second adapter 6 is configured to be detachably connected to the cover assembly or housing 1. When the developing cartridge 100 needs to be installed into the drum housing with the first type of pusher, the second adapter 6 does not need to be installed. When the developing cartridge 100 needs to be installed into the drum housing with the second type of pusher, the user manually installs the second adapter 6 into the cover assembly or housing 1. As a result, the size of the developing cartridge 100 increases in the second direction. Through the second adapter 6 abutting against the second type of pusher, the developing roller 2 and the photosensitive drum remain close to each other.

[0053] It should be noted that the cover assembly should be understood as a component that can be detachably connected to the housing 1 and is located at the left and right ends of the housing 1 respectively. For example, the end cover 3 mentioned above can be regarded as part of the cover assembly. When another end cover is installed on the non-drive end of the developing cartridge 100, or when a bracket or other component for supporting the developing roller is installed, the other end cover or bracket can also be regarded as part of the cover assembly.

[0054] Based on the inventive concept of this utility model, the adapter component described in Embodiment 1 and the adapter component described in Embodiment 2 can also be used together. That is, the first adapter component in Embodiment 1 that is movable relative to the housing 1 can be used together with the second adapter component in Embodiment 2 that is not movable relative to the housing 1, or the second adapter component in Embodiment 1 that is movable relative to the housing 1 can be used together with the first adapter component in Embodiment 2 that is not movable relative to the housing 1.

[0055] [Beneficial Effects]

[0056] 1. By setting the adapter component, the developing cartridge 100 can be adapted to different drum cartridges 200. As a result, compatible manufacturers do not need to prepare molds for multiple models of developing cartridges and multiple models of drum cartridges, and the warehousing difficulty can also be reduced. Ultimately, the production cost of compatible manufacturers can be reduced.

[0057] 2. For example Figure 3As shown, when the first movable member 51 is configured to be rotatable relative to the housing 1, and the first support shaft 53 is located closer to the second abutment 512 than the first abutment 511, the first abutment 511 will become the force-bearing part of the first movable member 51. When the first abutment 511 receives an external force, the first movable member 51 will rotate around the first support shaft 53.

[0058] In this embodiment, under the action of the first elastic member 52, the first movable member 51 is held in place. Figure 3 The second position shown, and by providing a limiting member on the housing 1 or end cap 3, ensures that the first movable member 51 can only remain above the first abutting portion 511 and the second abutting portion 512, and cannot continue to move along the elastic force of the first elastic member 52. Figure 3 Rotate in the opposite direction of r2.

[0059] Because the developing cartridge 100 does not move horizontally along the second direction during the installation process toward the drum cartridge 200, but instead moves around the first movable member 51... Figure 3 When the developing cartridge 100 rotates in the direction indicated by r1, the first abutment 511 will reach the inlet 203c before the second abutment 512. Therefore, when the first abutment 511, which is the force-bearing part, is located above the second abutment 512, the first movable member 51 can receive the external force earlier, so that the first movable member 51 overcomes the elastic force of the first elastic member 52 and moves relative to the housing 1. Thus, whether the developing cartridge 100 is installed toward the drum box 200 with the first positioning groove or toward the drum box 200 with the second positioning groove, the developing cartridge 100 can be installed more smoothly.

[0060] 3. Based on point 2 above, when the developing cartridge 100 is installed toward the drum cassette 200 having the second positioning groove, the reaction force exerted by the upper sidewall 203a on the first abutment 511 will be directed downwards and backwards, thus preventing the first movable member 51 from overcoming the elastic force of the first elastic member 52 and rotating in the direction shown by r2. Therefore, the first movable member 51 can be stably positioned in the positioning groove 203. When the developing cartridge 100 needs to be removed from the drum cassette 200, the developing cartridge 100 will move along... Figure 3 Rotating in the opposite direction of the direction shown by r1, during the rotation of the developing cartridge 100, the first abutting part 511 will be squeezed by the upper side wall 203a, forcing the first elastic member 52 to undergo elastic deformation, thereby causing the first abutting part 511 to disengage from the upper side wall 203a, so that the developing cartridge 100 can be smoothly removed.

[0061] Conversely, if the first support shaft 53 is positioned closer to the first abutment 511, then the second abutment 512 will become the force-bearing part of the first movable member 51. As can be seen from the above analysis, the movement of the first movable member 51 relative to the housing 1 may be delayed, which may cause the installation of the developing cartridge 100 to become stuck.

Claims

1. A developing cartridge, detachably mounted to a drum cartridge, wherein the developing cartridge and the drum cartridge are detachably mounted together to an imaging device; The drum box includes a frame, a photosensitive drum, a positioning groove, and a pushing part. The frame has a receiving groove for accommodating the developing cartridge, and the photosensitive drum is rotatably disposed in the frame. Its features are, The developing cartridge includes: The housing is used to contain the toner; A driving force receiver for receiving driving force from an imaging device; A developing roller, used to carry toner and supply toner toward a photosensitive drum, is driven by a driving force from a driving force receiver to rotate about a rotation axis parallel to a first direction. The adapter components enable the developer cartridge to be compatible with different drum cartridges; The direction intersecting the first direction is the second direction. Along the second direction, the developing roller is exposed forward. The direction intersecting the first and second directions is the third direction. The positioning groove is used to position the developing cartridge in the third direction. The pushing part is used to push the developing cartridge so that the developing roller and the photosensitive drum remain in contact. The different drum boxes refer to the fact that, in different drum boxes, at least one of the dimensions of the positioning groove in the third direction and the dimensions of the push section and the photosensitive drum in the second direction are different.

2. The developing cartridge according to claim 1, characterized in that, The adapter component includes a first adapter and a second adapter, both of which are movable relative to the housing. Along the second direction, the first adapter is located in front of the second adapter.

3. The developing cartridge according to claim 2, characterized in that, The first adapter is designed to be rotatable relative to the housing.

4. The developing cartridge according to claim 3, characterized in that, The first adapter includes a first movable member and a first elastic member, wherein the first movable member is configured to move relative to the housing between a first position and a second position. In the first position, the first movable member can engage with a first positioning groove, and in the second position, the first movable member can engage with a second positioning groove. Along a third direction, the size of the second positioning groove is larger than the size of the first positioning groove. The first elastic member is used to push the first movable member toward the second position.

5. The developing cartridge according to claim 4, characterized in that, The first movable part is cam-shaped and includes a first abutting part, a second abutting part, a third abutting part and a fourth abutting part, wherein the first abutting part and the second abutting part are arranged opposite to each other, the third abutting part and the fourth abutting part are arranged opposite to each other, and the maximum distance between the first abutting part and the second abutting part is greater than the maximum distance between the third abutting part and the fourth abutting part. In the first position, the third and fourth abutting parts are arranged along a third direction; in the second position, the first and second abutting parts are arranged along a third direction.

6. The developing cartridge according to claim 5, characterized in that, The first adapter also includes a first support shaft for supporting the first movable part, which is positioned closer to the second abutment than the first abutment.

7. The developing cartridge according to claim 2, characterized in that, The first adapter is designed to slide relative to the housing.

8. The developing cartridge according to any one of claims 2-7, characterized in that, The second adapter includes a second movable member and a second elastic member. The second movable member is configured to move relative to the housing between a third position and a fourth position. In the third position, the second movable member can engage with a first type of push part. In the fourth position, the second movable member can engage with a second type of push part. Along the second direction, the second type of push part is further away from the photosensitive drum than the first type of push part. The second elastic member is used to push the second movable member toward the fourth position.

9. The developing cartridge according to claim 8, characterized in that, The developing cartridge also includes an end cap, an extension, and a limiting part. The end cap is fixedly connected to the housing, and the driving force receiving member is exposed through the end cap. The extension is connected to the end cap or the housing. The limiting part is disposed on the extension and is movable relative to the housing. The limiting part is used to abut against a second movable member, so that the second movable member is held in a third or fourth position.

10. The developing cartridge according to any one of claims 2-7, characterized in that, The second adapter is designed to slide relative to the housing.

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