Developing cartridge

Abstract

The utility model relates to a developing box which is detachably arranged in imaging equipment provided with a counted piece, and the developing box comprises a shell used for accommodating carbon powder; the developing roller is rotatably arranged in the shell, is used for bearing carbon powder and is provided with a rotating axis parallel to the left-right direction; the driving force receiving part is used for receiving driving force from the imaging equipment; the counting assembly is provided with a counting piece capable of moving between a close position and a far position, the counting piece rotates and moves from the close position to the far position under the action of the driving force from the driving force receiving piece, and in the process, the counting piece and the counted piece interact to achieve counting; the reset piece is provided with a stress part used for receiving the pressing force, at least the stress part is exposed upwards in the direction intersecting with the left-right direction, and the use experience of a user can be improved through the technical scheme.

Description

Technical Field

[0001] This utility model relates to the field of electrophotographic imaging, and more particularly to a developing cartridge that can be detachably installed in an electrophotographic imaging device. Background Technology

[0002] In order to enable imaging equipment to know the model, service life and other parameters of the developing cartridge, a counting device has been installed in the developing cartridge. When the developing cartridge starts to form an image in the imaging equipment, the counting device receives a driving force and touches the counted component in the imaging equipment. After the counting is completed, the counting device no longer receives a driving force and stops working.

[0003] When a developing cartridge equipped with a counting device needs to be regenerated, the regenerator needs to remove the end cap that protects the counting device, then reset the counting device, and then reinstall the end cap. To reduce the regeneration process, a reset component has been installed in the developing cartridge, so that the regenerator can reset the counting device without removing the end cap.

[0004] The existing reset component is configured such that when the developer cartridge is installed into the imaging device, a portion of the reset component abuts against the imaging device. However, when the imaging device experiences a paper jam or other situations requiring the developer cartridge to be temporarily removed, the counting component resets once the portion of the reset component is no longer abutting against the imaging device. When the user reinstalls the developer cartridge into the imaging device, the imaging device will consider the developer cartridge to be new. In reality, some of the toner contained in the developer cartridge has already been consumed. Finally, even if the toner in the developer cartridge is completely consumed, the imaging device will not remind the user to replace it with a new developer cartridge. Utility Model Content

[0005] In view of the above, this utility model provides a developing cartridge employing the following technical solution to solve the aforementioned technical problems, specifically:

[0006] The developing cartridge is detachably installed in an imaging device equipped with counting components. The developing cartridge includes: a housing for containing toner; and a developing roller rotatably disposed in the housing for carrying toner and having a rotation axis parallel to the left-right direction.

[0007] A driving force receiver is used to receive driving force from an imaging device; a counting assembly has a counting member that can move between a proximal position and a remote position, which rotates under the action of the driving force from the driving force receiver and moves from the proximal position to the remote position, during which the counting member interacts with the counted object to achieve counting; a reset member has a force-receiving part for receiving pressing pressure, and at least the force-receiving part is exposed upward along a direction intersecting the left and right directions.

[0008] In some implementations, when the developing cartridge is installed into the imaging device, the force-bearing part does not come into contact with the inner wall of the imaging device.

[0009] In some embodiments, the reset member further includes a body and a limiting part, both of which are connected to the body. The force-receiving part is used to receive an external force that forces the limiting part to move relative to the housing, and the limiting part is used to cooperate with the counter to limit the counter from continuing to rotate.

[0010] In some embodiments, the reset member is configured to move between a locked position and an unlocked position. When the reset member is in the locked position, the counter is locked and cannot rotate in the direction of rotation of the counter. When the reset member is in the unlocked position, the counter is unlocked and can rotate in the direction of rotation of the counter. The reset member also includes a second pusher for pushing the reset member toward the locked position.

[0011] In some embodiments, the second pusher is formed as a cantilever integrally formed with the main body.

[0012] In some embodiments, the reset member further includes a clearance portion disposed in the limiting portion, which is used to prevent the counter and the reset member from interfering with each other during the rotation of the counter.

[0013] In some embodiments, the reset member is configured to be rotatable relative to the housing, and the reset member further includes a rotating portion connected to the main body; the developing cartridge further includes an end cap fixedly connected to the housing, at least the driving force receiving member is exposed through the end cap, the end cap or housing is provided with a mating portion for engaging with the rotating portion; in the left-right direction, one end of the mating portion forms an opening that allows the rotating portion to enter.

[0014] In some embodiments, the counting element includes: a rotating body; a toggle portion extending from the rotating body along the rotation axis of the counting element for toggle the counted element; a driving force receiving portion disposed on the rotating body for receiving driving force from the driving force receiving portion to drive the rotating body to rotate about its rotation axis; and a restrained portion disposed on the rotating body, wherein when the counting element reaches a remote position, the restrained portion engages with a reset portion, and the counting element stops moving, and when viewed along a direction perpendicular to the rotation axis of the counting element, the restrained portion is located within the projection range of the rotating body.

[0015] In some embodiments, the size of the restricted portion along the rotation axis of the counter is smaller than the size of the driving force receiving portion.

[0016] In some embodiments, the restricted part is a groove provided on the rotating body. Attached Figure Description

[0017] Figure 1 This is a perspective view of the developing cartridge involved in this utility model.

[0018] Figure 2 This is an exploded view of some components of the developing cartridge involved in this utility model.

[0019] Figure 3 This is a perspective view of the resetting component in the developing cartridge that relates to this utility model.

[0020] Figure 4 This is a perspective view of the counting component involved in this utility model.

[0021] Figure 5A This is a perspective view of the counting component in the developing cartridge of this utility model, with the end cap hidden during the counting process.

[0022] Figure 5B This is a perspective view of the counting component in the developing cartridge of this utility model after the counting is completed and the end cap is hidden. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0024] [Overall structure of the developing chamber]

[0025] like Figure 1 As shown, the developing cartridge 100 includes a housing 1, a rotating component 2, and a driving force receiving component 3. The housing 1 is used to contain toner, and the driving force receiving component 3 is used to receive driving force from the imaging device to directly or indirectly drive the rotating component 2 to rotate. The rotating component 2 is rotatably disposed in the housing 1. The rotating component 2 includes a developing roller 21 with a rotation axis L. The developing roller 21 is used to carry toner and supply toner to the outside of the developing cartridge 100.

[0026] In some embodiments, the developing cartridge 100 can be directly and detachably installed into an imaging device with a pre-set photosensitive drum. When the developing cartridge 100 is installed into the imaging device, the developing roller 21 is arranged opposite to the photosensitive drum. During imaging, the developing roller 21 supplies toner to the photosensitive drum, thereby developing the electrostatic latent image formed on the photosensitive drum.

[0027] In some embodiments, the developing cartridge 100 can be detachably installed into a drum housing containing a photosensitive drum, with the developing roller 21 arranged opposite to the photosensitive drum. Then, the drum housing carrying the developing cartridge 100 is detachably installed into the imaging device. During imaging, the developing roller 21 supplies toner to the photosensitive drum, thereby developing the electrostatic latent image formed on the photosensitive drum.

[0028] The counting component 5 and the reset component 6 involved in this utility model are applicable whether the developing cartridge 100 is detachably installed to the imaging device directly or indirectly.

[0029] Continue as Figure 1 As shown, the developing cartridge 100 also includes a handle 11, a counting component 5, and a reset component 6. The user can install and remove the developing cartridge 100 by gripping the handle 11. The counting component 5 is used to interact with the counted component in the imaging device, and the reset component 6 is used to reset the counting component 5.

[0030] To make the following description clearer, the direction parallel to the rotation axis L is defined as the left-right direction, where the side where the driving force receiving element 3 is located is the left side, and the side opposite to the left direction is the right side. The arrangement direction of the developing roller 21 and the handle 11 is the front-back direction. The developing roller 21 is located in front of the handle 11. The developing cartridge 100 is installed forward in a roughly front-back direction. The front-back direction and the left-right direction intersect each other. At the same time, the direction that intersects the front-back direction and the left-right direction is the up-down direction. When the developing cartridge 100 is placed flat on a horizontal plane, a part of the developing roller 21 is exposed forward, and at the same time, another part of the developing roller 21 is exposed upward. Preferably, the front-back direction, the left-right direction, and the up-down direction are perpendicular to each other.

[0031] In some embodiments, the rotating member 2 further includes a powder feeding roller 22 rotatably disposed in the housing 1 (e.g., Figure 5A and Figure 5B As shown, the powder feeding roller 22 and the developing roller 21 are arranged adjacent to each other and in contact with each other. When the driving force receiving member 3 receives the driving force, the powder feeding roller 22 rotates around the rotation axis parallel to the left and right direction and supplies toner to the developing roller 21.

[0032] In some embodiments, the rotating member 2 also includes a stirring member rotatably disposed in the housing 1. When the driving force receiving member 3 receives the driving force, the stirring member rotates about a rotation axis parallel to the left and right direction. On the one hand, the rotating stirring member helps to prevent toner from clumping in the housing 1. On the other hand, the stirring member conveys the toner toward the developing roller 21 / toner feeding roller 22.

[0033] [Drive force transmission components]

[0034] The developing cartridge 100 also includes a driving force transmission assembly 4, which transmits the driving force received by the driving force receiver 3 to the rotating component 2 and the counting assembly 5; Figure 2 As shown, the driving force transmission assembly 4 includes at least a first transmission member 41 and a second transmission member 42. The first transmission member 41 is coaxially arranged with the driving force receiving member 3. Preferably, the first transmission member 41 and the driving force receiving member 3 are integrally formed. The second transmission member 42 is combined with the first transmission member 41 and is disposed at the end of the developing roller 21. In this way, the driving force received by the driving force receiving member 3 can be transmitted to the developing roller 21 through the first transmission member 41 and the second transmission member 42.

[0035] When the developing cartridge 100 is also provided with the aforementioned powder feeding roller 22, the driving force transmission assembly 4 further includes a third transmission member 43 disposed at the end of the powder feeding roller 22. The third transmission member 43 can be combined with one of the first transmission member 41 and the second transmission member 42 to receive driving force, thereby driving the powder feeding roller 22.

[0036] When the developing cartridge 100 is also provided with the above-mentioned stirring member, the driving force transmission assembly 4 further includes a fourth transmission member 44 disposed at the end of the stirring member. The fourth transmission member 44 can receive the driving force from the driving force receiving member 3 to drive the stirring member to rotate. The fourth transmission member 44 can be combined with one of the first transmission member 41, the second transmission member 42 and the third transmission member 43 to receive the driving force. Alternatively, an intermediate transmission member 45 can be separately disposed in the developing cartridge 100. The intermediate transmission member 45 transmits the driving force received from the driving force receiving member 3 to the fourth transmission member 44.

[0037] [Counting Component]

[0038] like Figure 1 and Figure 2 As shown, the developing cartridge 100 also includes an end cap 12 connected to the housing 1. The end cap 12 covers at least a portion of the driving force transmission assembly 4 to prevent the driving force transmission assembly 4 from falling off or interfering with external components. The end cap 12 includes an end cap body 120 and a first through hole 121 and a second through hole 122 disposed on the end cap body 120. The driving force receiving member 3 is exposed to the outside through the first through hole 121, and the counting assembly 5 is exposed to the outside through the second through hole 122.

[0039] This embodiment illustrates the example of the counting component 5 and the driving force receiver 3 being located at the same end of the housing 1. However, in other feasible embodiments, the counting component 5 and the driving force receiver 3 may also be located at two different ends of the housing 1.

[0040] The counting assembly 5 includes a counting element 51, a guide element 52, and a first pushing element 53. Guided by the guide element 52, the counting element 51 can move from a proximity position close to the housing 1 to a distance position away from the housing 1 in the left-right direction. During the process of the counting element 51 moving from the proximity position to the distance position and / or when the counting element 51 is held in the distance position, the counting element 51 can interact with the counted item in the imaging device.

[0041] The first pushing member 53 is used to push the counting member 51 toward the approaching position. It can be implemented as a compression spring / magnetic member disposed between the end cover 12 and the counting member 51, or as a tension spring / magnetic member disposed between the counting member 51 and the housing 1. When the counting member 51 moves from the approaching position to the farthest position, the first pushing member 53 generates a pushing force. When the counting member 53 finishes counting, the first pushing member 53 releases the pushing force, forcing the counting member 53 to move from the farthest position to the approaching position.

[0042] The counting element 51 includes a rotating body 511, a tossing part 512, a driving force receiving part 513, and a restrained part 514. The rotating body 511 is configured as a columnar body with a rotation axis L5. The tossing part 512 extends from the rotating body 511 along the rotation axis L5 and is used to toss the counting element. The driving force receiving part 513 is disposed on the rotating body 511 and is used to receive the driving force from the driving force receiving part 3 to drive the rotating body 511 to rotate around the rotation axis L5. Preferably, the driving force receiving part 513 is a tooth disposed on the rotating body 511. More preferably, the driving force receiving part 513 is a ring of teeth disposed along the circumference of the rotating body 511.

[0043] The restricted part 514 is provided on the rotating body 511. When the counting member 51 finishes counting, the restricted part 514 engages with the reset member 6, thereby stopping the counting member 51 from moving.

[0044] In some embodiments, when viewed along a direction perpendicular to the rotation axis L5, the restricted portion 514 is located within the projection range of the rotating body 511, and the dimension of the restricted portion 514 extending along the rotation axis L5 is smaller than the dimension of the tooth extension, so that the arrangement of the restricted portion 514 does not affect the driving force receiving portion 513 receiving the driving force.

[0045] In some embodiments, the restricted portion 514 is a protrusion that protrudes from the rotating body 511.

[0046] In some embodiments, the restricted portion 514 is a groove provided on the rotating body 511. The restricted portion 514 being a groove is more advantageous than the restricted portion 514 being a protrusion, as will be explained below.

[0047] The guide member 52 is fixedly disposed relative to the housing 1. Preferably, the guide member 52 is integrally formed with the housing 1. The developing cartridge 100 also includes a support column 13 for supporting the counter member 51. The guide member 52 is disposed around the support column 13, such as... Figure 2As shown, the guide 52 is configured as a protrusion, including an ascending section 521 and a retaining section 522. The ascending section 521 has a helical surface / inclined surface for guiding the counter 51 from a near position to a far position. The retaining section 522 is used to hold the counter 51 in the far position. Along the rotation direction of the counter 51, or in other words, around the circumference of the support column 13, the guide 52 extends in an arc shape rather than a circle.

[0048] When the developing cartridge 100 is installed into the imaging device, and the driving force receiver 3 receives the driving force, the counter 51 begins to move along the rotation direction r (e.g., ...). Figure 2 As shown), the counter 51 rotates around the rotation axis L5. As the counter 51 is guided by the rising section 521, the counter 51 gradually moves from the near position to the far position until the counter 51 is supported by the holding section 522. During this process, the actuating part 512 actuates the counter to realize the detection / counting of the developing cartridge 100 by the imaging device. After the detection / counting is completed, the counter 51 is no longer supported by the holding section 522. Under the action of the pushing force of the first pushing member 53, the counter 51 begins to move from the far position to the near position.

[0049] Furthermore, the guide member 52 also includes a buffer section (not shown). Along the rotation direction r, the buffer section is disposed adjacent to the holding section 522, and during one counting cycle of the counter member 51, the buffer section is located downstream of the holding section 522. Preferably, the buffer section is provided with a downward or inclined buffer surface. When the counter member 51 is no longer supported by the holding section 522, under the action of the thrust, the counter member 51 can first contact the buffer section, which can reduce the impact force on the counter member 51. On the other hand, under the action of the buffer surface, the counter member 51 continues to rotate a predetermined angle along the direction indicated by r, so that the teeth 513 can engage more smoothly with the fourth transmission member 44 / intermediate transmission member 45.

[0050] [Reset component]

[0051] The reset element 6 is movably positioned relative to the housing 1, such as... Figure 2 and Figure 3As shown, the reset member 6 includes a main body 61, a limiting part 62, and a force-receiving part 64. Both the limiting part 62 and the force-receiving part 64 are connected to the main body 61. The limiting part 62 is used to cooperate with the limited part 514 to limit the counting member 51 from continuing to rotate. At this time, the counting member 51 is in a locked state along the rotation direction r. The force-receiving part 64 is used to receive external force, forcing the reset member 6 / limiting part 62 to move relative to the housing 1, so that the limiting part 62 and the limited part 514 are disengaged. At this time, the counting member 51 is in an unlocked state along the rotation direction. Therefore, the reset member 6 / limiting part 62 can be described as being able to move between a locked position and an unlocked position. When the reset member 6 / limiting part 62 is in the locked position, the counting member 51 is in a locked state and cannot rotate along the rotation direction r. When the reset member 6 / limiting part 62 is in the unlocked position, the counting member 51 is in an unlocked state and can rotate along the rotation direction r.

[0052] In some embodiments, the reset member 6 is configured to rotate relative to the housing 1. Specifically, the reset member 6 further includes a rotating part 63 connected to the main body 61. The limiting part 62 and the force-receiving part 64 are located on both sides of the rotating part 63. Overall, the reset member 6 is formed as a lever structure. The rotating part 63 can be integrally formed with the main body 61 or it can be independent of the main body 61 and then installed on the main body 61. Obviously, when the rotating part 63 is integrally formed with the main body 61, it is beneficial to simplify the structure of the reset member 6 and reduce the installation steps of the reset member 6.

[0053] In some embodiments, the end cap 12 or the housing 1 is further provided with a mating part 123 for engaging with the reset member 6 / rotating part 63. Preferably, the mating part 123 is formed as a groove, and one end of the mating part 123 forms an opening that allows the rotating part 63 to enter in the left-right direction. In this way, the reset member 6 can be quickly assembled and positioned into the mating part 123 in the left-right direction.

[0054] In some embodiments, the mating part 123 and the rotating part 63 can also be interchanged.

[0055] In some embodiments, the reset member 6 further includes a clearance portion 67 disposed on the limiting portion 62. During the rotation of the counter member 51, even if the teeth 513 come into contact with the limiting portion 62, the teeth 513 can pass smoothly through the limiting portion 62 through the clearance portion 67. That is to say, the clearance portion 67 has the function of preventing the counter member 51 and the limiting portion 62 from interfering with each other. It can be implemented that the clearance portion 67 is disposed on at least one inclined surface of the limiting portion 62, or that the clearance portion 67 is disposed on an arc-shaped chamfer of the limiting portion 62.

[0056] In some embodiments, the reset member 6 further includes an anti-detachment part 66, through which the reset member 6 can be stably installed. It is possible that the anti-detachment part 66 can be connected to at least one of the main body 61, the limiting part 62 and the force-bearing part 64. Preferably, the anti-detachment part 66 is configured as a cantilever to facilitate the installation and removal of the reset member 6.

[0057] In some embodiments, the reset member 6 further includes a second pushing member 65, which is used to push the reset member 6 toward the locked position. The second pushing member 65 can be connected to at least one of the main body 61, the limiting part 62, and the force-receiving part 64. The second pushing member 65 can be configured as an elastic or magnetic element separately formed from the main body 61, or it can be configured as a cantilever integrally formed with the main body 61 (e.g.,...). Figure 3 (As shown).

[0058] like Figure 5A As shown, during the counting process, the limiting part 62 does not cooperate with the limited part 514, the reset part 6 / limiting part 62 is in the unlocked position, the counting part 51 is in the unlocked state, and under the driving force of the driving force receiving part 3, the counting part 51 rotates in the rotation direction r, and the teeth 513 contact the limiting part 62; as Figure 5B As shown, when the counter 51 finishes counting, the limiting part 62 cooperates with the limited part 514, the reset part 6 / limiting part 62 reaches the locked position, and the counter 51 is in a locked state.

[0059] When the counter 51 needs to be reset, the user removes the developing cartridge 100 from the imaging device and presses down on the force-receiving part 64, causing the main body 61 to rotate around the rotating part 63. The second pushing member 63 generates a pushing force, and the limiting part 62 disengages from the limited part 514. Under the pushing force applied by the first pushing member 53, the counter 51 moves towards the housing 1. At the same time, under the action of the buffer surface, the counter 51 continues to rotate a predetermined angle along the rotation direction r. Finally, the toothed part 513 engages with the fourth transmission member 44 / intermediate transmission member 45, and the counter 51 can receive the driving force of the driving force receiving member 3 and interact with the counted part again.

[0060] When the user stops pressing the force-bearing part 64, the second pusher 63 releases the pushing force, forcing the reset part 6 / restriction part 62 back to the position where the restriction part 62 can cooperate with the restricted part 514.

[0061] [Beneficial Effects]

[0062] In summary, the developing cartridge of this utility model has the following beneficial effects:

[0063] 1. At least the force-bearing part 64 is exposed upwards along the vertical direction, which not only makes it easier for the user to apply pressure to the force-bearing part 64 to reset the counter 51, but also prevents the user from removing the developing cartridge 100 from the imaging device before the toner in the housing 1 is completely consumed, thus causing the counter 51 to reset prematurely.

[0064] In the prior art, since part of the reset component needs to be in contact with the inner wall of the imaging device or the drum box, when the imaging device jams or the user needs to check the condition of the bottom of the developing cartridge 100, the user removes the developing cartridge 100 from the imaging device or the drum box. At this time, the reset component will reset the counter 51 because it is no longer in contact with the inner wall of the imaging device or the drum box. However, there is still unused toner in the developing cartridge. If the user reinstalls the developing cartridge into the imaging device, the imaging device will consider the developing cartridge to be new, thus causing the toner in the developing cartridge to be consumed, but the imaging device still does not remind the user to replace the developing cartridge.

[0065] In the developing cartridge 100 of this utility model, since the force-bearing part 64 no longer abuts against the inner wall of the imaging device or the drum, even if the user removes the developing cartridge 100 from the imaging device or the drum, the reset member 51 will not reset. Thus, the defect of the counter member 51 being reset prematurely can be overcome, and the user experience can be improved.

[0066] 2. The reset member 6 is configured to be movable relative to the housing 1. In particular, when the reset member 6 is configured to be rotatable relative to the housing, the space required for the reset member 6 can be greatly reduced. The user only needs to apply pressure to the force-bearing part 64 to reset the counter 51. It can be seen that the reset operation of the reset member 51 is simple.

[0067] 3. The components in the reset piece 6 can be integrally formed, which helps to simplify the structure of the reset piece 6 and reduce the assembly steps of the developing cartridge 100.

[0068] 4. In the vertical direction, at least a portion of the reset member 6 is located above the rotation axis L5 of the counter member 51, which not only facilitates the operation of the reset member 6, but also facilitates the installation of the reset member 6.

[0069] 5. When viewed along a direction perpendicular to the axis of rotation L5, the restricted part 514 is located within the projection range of the rotating body 511. Firstly, this reduces the size of the counting element 51 and simplifies its structure.

[0070] Secondly, compared to the restricted part 514 being located outside the projection range of the rotating body 511, when the restricted part 514 and the restricting part 62 cooperate with each other, the restricted part 514 in this application can have more surfaces combined with the reset member 6, thereby the counting member 51 can be more stably kept in a non-rotatable state.

[0071] Thirdly, it can prevent the counting component 51 from interfering with other components.

Claims

1. A developing cartridge, detachably mounted in an imaging device equipped with counting components, characterized in that, The developing cartridge includes: The housing is used to contain the toner; The developing roller, rotatably mounted in the housing, is used to carry toner and has a rotation axis parallel to the left and right directions; A driving force receiver for receiving driving force from an imaging device; The counting assembly has a counting element that can move between a near position and a far position. Under the action of a driving force from a driving force receiver, the counting element rotates and moves from the near position to the far position. During this process, the counting element interacts with the item being counted to achieve counting. The reset member has a force-receiving portion for receiving pressing pressure, and at least the force-receiving portion is exposed upward along a direction intersecting the left and right directions.

2. The developing cartridge according to claim 1, characterized in that, When the developing cartridge is installed into the imaging device, the force-bearing part does not come into contact with the inner wall of the imaging device.

3. The developing cartridge according to claim 1, characterized in that, The reset component also includes a main body and a limiting part. Both the force-receiving part and the limiting part are connected to the main body. The force-receiving part is used to receive the external force that forces the limiting part to move relative to the housing. The limiting part is used to cooperate with the counter to limit the counter from continuing to rotate.

4. The developing cartridge according to claim 3, characterized in that, The reset element is configured to move between a locked position and an unlocked position. When the reset element is in the locked position, the counter is locked and cannot rotate in the direction of rotation of the counter. When the reset element is in the unlocked position, the counter is unlocked and can rotate in the direction of rotation of the counter. The reset member also includes a second pusher for pushing the reset member toward the locked position.

5. The developing cartridge according to claim 4, characterized in that, The second pusher is formed as a cantilever integrally with the main body.

6. The developing cartridge according to claim 3, characterized in that, The reset component also includes a clearance portion disposed in the limiting part, which is used to prevent the counter and the reset component from interfering with each other during the rotation of the counter.

7. The developing cartridge according to claim 3, characterized in that, The reset element is configured to be rotatable relative to the housing, and the reset element also includes a rotating part connected to the main body; The developing cartridge also includes an end cap fixedly connected to the housing, at least the drive force receiving element is exposed through the end cap, and the end cap or housing is provided with a mating part for engaging with the rotating part; Along the left-right direction, one end of the mating part forms an opening that allows the rotating part to enter.

8. The developing cartridge according to any one of claims 1-7, characterized in that, The counting components include: Solid of revolution; A toggle part, extending from the rotating body along the rotation axis of the counting element, is used to aggle the counting element; A driving force receiving unit is provided on the rotating body for receiving driving force from the driving force receiving member to drive the rotating body to rotate around its rotation axis. The limiting part is provided on the rotating body. When the counting unit reaches the far-away position, the limiting part engages with the reset part, and the counting unit stops moving. When viewed along a direction perpendicular to the axis of rotation of the counting element, the restricted part is located within the projection range of the rotating body.

9. The developing cartridge according to claim 8, characterized in that, Along the rotation axis of the counter, the size of the restricted part is smaller than the size of the driving force receiving part.

10. The developing cartridge according to claim 8, characterized in that, The restricted part is a groove provided on the rotating body.

Images