Developing box

Abstract

This utility model relates to a developing cartridge that is detachably installed in an imaging device equipped with a force-applying member. The developing cartridge includes: a first cartridge body for containing developer; a developing roller for carrying developer and for contacting a photosensitive drum outside the developing cartridge for developing and imaging; and a separating member having a force-receiving portion for receiving the force applied by the force-applying member and abutting against a force-receiving portion outside the developing cartridge, such that the first cartridge body moves relative to the photosensitive drum, and the developing roller and the photosensitive drum change from a state of being close to each other to a state of being separated from each other; when the developing roller and the photosensitive drum are in both the state of being close to each other and the state of being separated from each other, the force-receiving portion is respectively opposite to both ends of the same surface of the force-applying member on the cartridge side.

Description

Technical Field

[0001] This utility model relates to the field of electrophotographic imaging, and more specifically to a developing cartridge for detachable installation in an electrophotographic imaging device. Background Technology

[0002] A separate processing cartridge is available, comprising a detachably connected developing cartridge and a drum cartridge. The developing cartridge includes a first housing and a developing roller rotatably disposed therein, while the drum cartridge includes a second housing and a photosensitive drum rotatably disposed therein. In non-imaging states, if the developing roller and photosensitive drum remain in contact for extended periods, surface damage to both can easily occur. Therefore, a separation mechanism is required on the developing cartridge to keep the developing roller and photosensitive drum separated in non-imaging states, and to bring them into contact again during imaging operations, thereby improving component lifespan and ensuring image quality.

[0003] When the developing cartridge is not performing imaging operations (such as cleaning the photosensitive drum), the force-applying components within the electrophotographic imaging equipment / drum box need to apply force to the separation components to separate the developing roller from the photosensitive drum, ensuring complete separation. However, in practical applications, it has been found that the separation force required by the separation components in existing developing cartridges is often excessive or improperly positioned, causing unnecessary impacts or deflections to the developing cartridge during separation, affecting the smoothness of separation, and potentially causing interference or damage between components. Furthermore, excessive separation force can also affect the assembly stability between the developing cartridge and the drum box, thereby impacting the alignment accuracy and image quality during image formation. Utility Model Content

[0004] This utility model provides a developing cartridge to overcome the above-mentioned defects. The specific solution is as follows:

[0005] A developing cartridge, detachably installed into a drum cartridge, is detachably installed into an imaging device along with the drum cartridge. The drum cartridge is provided with a cartridge-side force-applying member for abutting against a force-applying member. The developing cartridge comprises: a first cartridge body for containing developer; a developing roller for carrying developer and for contacting a photosensitive drum outside the developing cartridge for developing and imaging; a toner roller rotatably disposed within the first cartridge body, the toner roller including a toner roller shaft and a toner layer located radially outward of the toner roller shaft; and a separating member having a force-receiving portion for receiving the force applied by the cartridge-side force-applying member, the force-receiving portion abutting against the cartridge-side force-applying member, causing the first cartridge body to move relative to the photosensitive drum, and the developing roller and the photosensitive drum to change from a state of proximity to each other to a state of separation; when the developing roller and the photosensitive drum are in both states of proximity and separation, the force-receiving portion is opposite to both ends of the same surface of the cartridge-side force-applying member.

[0006] In some embodiments, the force receiving portion is configured as a plane parallel to the longitudinal direction.

[0007] In some embodiments, the box-side force-applying member has 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, and the box-side force-applying member rotates around the third part;

[0008] When viewed along the longitudinal direction, the second part is formed as a polygonal body, including a first side, a second side, and a third side. The two ends of the second side are connected to the first side and the third side, respectively. The first side and the second side intersect at a first intersection point, and the second side and the third side intersect at a second intersection point. Along the rotation direction of the force-applying component on the side of the box, the first intersection point is located downstream of the second intersection point.

[0009] When the developing roller and the photosensitive drum are close to each other, the force receiving part is opposite to the second side.

[0010] When the developing roller and the photosensitive drum are separated from each other, the force receiving part is opposite to the third side.

[0011] In some embodiments, the box-side force-applying member has 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, and the box-side force-applying member rotates around the third part;

[0012] When viewed along the longitudinal direction, the second part is formed as a polygonal body, including a first side, a second side, and a third side, wherein the two ends of the second side are connected to the first side and the third side respectively; the first side and the second side intersect at a first intersection point, and the second side and the third side intersect at a second intersection point. Along the rotation direction of the force-applying component on the side of the box, the first intersection point is located downstream of the second intersection point.

[0013] In both the developing roller and the photosensitive drum being close to each other and separated from each other, the force receiving part is opposite to two different positions on the second side, and the two different positions are located between the first intersection point and the second intersection point.

[0014] In some embodiments, the powder feeding roller shaft includes a left roller shaft located on the left side of the powder feeding layer and a right roller shaft located on the right side of the powder feeding layer, wherein the longitudinal length of the left roller shaft is greater than the longitudinal length of the right roller shaft in the longitudinal direction.

[0015] In some embodiments, the developing cartridge further includes a first mounting hole and a second mounting hole disposed in the first cartridge body, and a second sealing member disposed in the first mounting hole and the second mounting hole, the second sealing member being used to seal the two longitudinal ends of the powder feeding roller.

[0016] In some embodiments, the maximum size of the first mounting hole is greater than the maximum size of the second mounting hole.

[0017] In some embodiments, the developing cartridge includes a first sealing element mounting portion disposed on the first cartridge body, and a first sealing element mounted on the first sealing element mounting portion.

[0018] In some embodiments, the powder feeding layer overlaps with at least a portion of the first seal in a direction perpendicular to the longitudinal direction.

[0019] In some embodiments, the second seal overlaps at least a portion of the first seal in a direction perpendicular to the longitudinal direction.

[0020] The beneficial effects of this utility model are as follows: During the rotation of the second part, the force receiving part changes from being opposite to the first intersection point to being opposite to the second intersection point, without having to completely cross the second intersection point. This helps to reduce the force required to apply to the force-applying component, thereby allowing the developing roller and the photosensitive drum to more smoothly change from a state of being close to each other to a state of being separated from each other. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a processing box having the developing box according to Embodiment 1 of this utility model.

[0022] Figure 2 This is a cross-sectional schematic diagram of the processing box according to Embodiment 1 of this utility model.

[0023] Figure 3 This is a perspective view of the drum box involved in this utility model.

[0024] Figure 4 This is a schematic diagram of the structure of the drum box involved in Embodiment 1 of this utility model.

[0025] Figure 5 This is a diagram showing the state of the developing cartridge and drum cartridge after separation, according to Embodiment 1 of this utility model.

[0026] Figure 6 This is a side view of the processing box having the developing box according to Embodiment 1 of this utility model, viewed along the longitudinal direction.

[0027] Figure 7 This is a perspective view of the driving force transmission component in the developing cartridge according to Embodiment 2 of this utility model.

[0028] Figure 8A and Figure 8B This is a schematic diagram of the developing cartridge being installed into the drum cartridge according to Embodiment 3 of this utility model.

[0029] Figure 9 This is a schematic diagram of the guide rail in the imaging device according to Embodiment 3 of this utility model.

[0030] Figure 10This is a schematic diagram of the chip assembly involved in Embodiment 3 of this utility model being installed in an imaging device.

[0031] Figure 11 This is a schematic diagram of the chip assembly involved in Embodiment 3 of this utility model.

[0032] Figure 12 This is a schematic diagram of the imaging device involved in Embodiment 3 of this utility model.

[0033] Figure 13A This is a perspective view of the developing cartridge involved in Embodiment 4 of this utility model.

[0034] Figure 13B This is a plan view of the developing cartridge according to Embodiment 4 of this utility model, after it has been installed into the drum cartridge, with the developing roller and the photosensitive drum separated from each other.

[0035] Figure 14 This is a side view of the developing cartridge involved in Embodiment 4 of this utility model, viewed along the longitudinal direction.

[0036] Figure 15A This is a side view taken along the longitudinal direction when the developing roller in the developing box and the photosensitive drum in the drum box are close to each other, according to Embodiment 4 of this utility model.

[0037] Figure 15B This is a side view taken along the longitudinal direction when the developing roller in the developing box and the photosensitive drum in the drum box are separated from each other, according to Embodiment 4 of this utility model.

[0038] Figure 16 This is a schematic diagram of the non-driving end of the developing cartridge according to Embodiment 5 of this utility model.

[0039] Figure 17A This is a side view taken along the longitudinal direction when the developing roller in the developing box and the photosensitive drum in the drum box are close to each other, according to Embodiment 5 of this utility model.

[0040] Figure 17B This is a side view taken along the longitudinal direction when the developing roller in the developing box and the photosensitive drum in the drum box are separated, according to Embodiment 5 of this utility model.

[0041] Figure 18 This is a perspective view of the developing cartridge involved in Embodiment 5 of this utility model, viewed from bottom to top.

[0042] Figure 19 This is a schematic diagram of the non-driving end of the developing cartridge according to Embodiment 6 of this utility model.

[0043] Figure 20A This is a side view taken in the vertical direction when the developing roller in the developing cassette and the photosensitive drum in the drum cassette are close to each other, according to Embodiment 6 of this utility model.

[0044] Figure 20B This is a side view taken in the vertical direction when the developing roller in the developing cassette and the photosensitive drum in the drum cassette are separated from each other, according to Embodiment 6 of this utility model.

[0045] Figure 21 This is a perspective view of the developing cartridge according to Embodiment 7 of this utility model, after the end cap and the first cartridge body have been separated.

[0046] Figure 22 This is an exploded view of the driving force transmission component and some parts of the developing cartridge in Embodiment 7 of this utility model.

[0047] Figure 23A This is a plan view of the driving force transmission component in the developing cartridge according to Embodiment 7 of this utility model, viewed from top to bottom.

[0048] Figure 23B This is a plan view of the driving force transmission component in the developing cartridge according to Embodiment 7 of this utility model, viewed from left to right.

[0049] Figure 24 This is a plan view of the driving force transmission component in the developing cartridge according to Embodiment 8 of this utility model, viewed from left to right.

[0050] Figure 25 This is a plan view of the driving force transmission component in the developing cartridge according to Embodiment 8 of this utility model, viewed from bottom to top.

[0051] Figure 26 This is a plan view of the powder feeding roller in the developing box according to Embodiment 9 of this utility model, viewed along a direction perpendicular to the longitudinal direction.

[0052] Figure 27A This is a perspective view of the first cartridge drive end in the developing cartridge according to Embodiment 9 of this utility model.

[0053] Figure 27B This is a perspective view of the non-driving end of the first cartridge in the developing cartridge according to Embodiment 9 of this utility model.

[0054] Figure 28A and Figure 28B This is a perspective view of the developing cartridge involved in Embodiment 10 of this utility model.

[0055] Figure 29 This is a schematic diagram of the combination of the developing roller and accessories according to Embodiment 10 of this utility model.

[0056] Figure 30 This is a side view of the developing cartridge involved in Embodiment 11 of this utility model, viewed along the longitudinal direction. Detailed Implementation

[0057] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, it will be readily apparent to those skilled in the art that the present invention may be implemented in other ways different from those described herein. Therefore, other possible implementations that can be obtained by those skilled in the art based on the embodiments described herein are all within the scope of protection of this application.

[0058] In this invention, the imaging material cartridge includes a processing cartridge and an ink cartridge, as detailed in the specific embodiments.

[0059] Example 1

[0060] like Figure 1 and Figure 2 As shown, the processing cartridge 100 includes a developing cartridge 11 and a drum cartridge 12. The developing cartridge 11 can be installed onto the drum cartridge 12 and can be removed from the drum cartridge 12. In actual use, the developing cartridge 11 can be installed into the electrophotographic imaging device together with the drum cartridge 12 and can be removed from the electrophotographic imaging device together. With the developing cartridge 11 installed into the drum cartridge 12, the developing roller and the photosensitive drum are parallel to each other and face each other. After the developer contained in the developing cartridge 11 is used up, the developing cartridge 11 can be removed from the drum cartridge 12 and a new developing cartridge 11 can be replaced. When the photosensitive drum or other components installed in the drum cartridge 12 reach the end of their service life, a new drum cartridge 12 can also be replaced. The drum cartridge 12 includes a second cartridge body 121 and a photosensitive drum 14. The developing cartridge 11 includes a first cartridge body 111, a separation member 13, a developing roller 15, a powder feeding roller 16, and a stirring mechanism 17. The first cartridge body 111 has a developing agent receiving portion 10 for containing developing agent. The stirring member 17 is rotatably disposed in the developing agent receiving portion 10 for stirring the developing agent. The powder feeding roller 16 is used to convey the developing agent toward the developing roller 15, and the developing roller 15 is used to carry the developing agent.

[0061] like Figure 3 and Figure 4As shown, the drum housing 12 includes a photosensitive drum 14 and a second housing 121, wherein the photosensitive drum 14 is rotatably mounted on the second housing 121. The second housing 121 has a first abutment portion 1211 and a second abutment portion 1212 at its longitudinal ends, respectively. The first abutment portion 1211 and the second abutment portion 1212 abut against the separation member 13 of the developing cartridge 11, so that when the separation member 13 receives a force applied by the electrophotographic imaging device, the developing roller 15 separates from the photosensitive drum 14. A pusher 123 (including a left pusher 123L and a right pusher 123R) is disposed at both longitudinal ends of the second housing 121. The second housing 121 also has an elastic mechanism 122 for applying an elastic force to the pusher 123; a spring is shown in the figure, but it is understood that other structures for applying the elastic force may be used. The free end of the pusher 123 is used to abut against the first housing 111 of the developing cartridge 11 and to apply a pushing force to the first housing 111 to bring the developing roller 15 into contact with the photosensitive drum 14.

[0062] like Figure 5 and Figure 6 As shown, the drum housing 12 also includes a housing-side force-applying member 124. The housing-side force-applying member 124 is rotatably disposed on the second housing 121 in such a way that it can rotate about an axis extending in the longitudinal direction. The housing-side force-applying member 124 has a first part 124a, a second part 124b and a third part 124c. The first part 124a and the second part 124b are both connected to the third part 124c. The housing-side force-applying member 124 rotates about the third part 124c. The first part 124a is used to receive the force F applied by the force-applying member 1 in the imaging device, and the second part 124b is used to transmit the force F to the separation member 13.

[0063] In some embodiments, the force-applying member 1 can be disposed at the driving end of the developing cartridge 11, or at the non-driving end of the developing cartridge 11, or at both the driving end and the non-driving end of the developing cartridge 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 cartridge 11 and a right force-applying member located at the non-driving end of the developing cartridge 11. The left force-applying member can apply a separation force to the cartridge-side force-applying member 124, and then the cartridge-side force-applying member 124 applies the separation force to the developing cartridge 11. The right force-applying member directly applies a separation force to the developing cartridge 11.

[0064] Example 2

[0065] In this embodiment, the component names that are the same as those in the above embodiments 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 in Embodiment 1.

[0066] In the above embodiments and this embodiment, the developing roller 15 rotates around the rotation axis L. The longitudinal direction is parallel to the direction in which the rotation axis L extends. The developing cartridge 11 also includes a driving head 18. Along the longitudinal direction, the driving head 18 is located at one end of the first cartridge body 111. The driving head 18 is used to receive driving force from the electrophotographic imaging device (hereinafter referred to as "imaging device") to drive the developing roller 15 to rotate. Therefore, the first longitudinal end can also be regarded as the driving end of the developing cartridge 11 / processing cartridge 100. Along the longitudinal direction, the second longitudinal end is arranged opposite to the first longitudinal end. The second longitudinal end can be regarded as the non-driving end of the developing cartridge 11 / processing cartridge 100.

[0067] like Figure 7 As shown, the developing cartridge 11 also includes a driving force transmission assembly 5 for transmitting the driving force received by the driving head 18 to each component in the developing cartridge 11. The driving force transmission assembly 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. 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 driver. The second driving force receiving part 55 is coaxially arranged with the developing roller 15 as a developing roller driver. The third driving force receiving part 57 is coaxially arranged with the stirring mechanism 17 as a stirring mechanism driver. In this way, the developing roller 15, the powder feeding roller 16, and the stirring mechanism 17 can be driven respectively.

[0068] In some embodiments, the driving force transmission part 51 may also be configured as a ratchet, friction wheel, etc., and each driving force receiving part may also be configured as a ratchet, friction wheel, etc. Therefore, the above-mentioned meshing is only one way of connecting the corresponding components.

[0069] Example 3

[0070] Figure 8A and Figure 8B This is a schematic diagram of the developing cartridge being installed into the drum cartridge according to Embodiment 3 of this utility model; Figure 9 This is a schematic diagram of the guide rail in the imaging device according to Embodiment 3 of this utility model; Figure 10 This is a schematic diagram of the chip assembly involved in Embodiment 3 of this utility model being installed in an imaging device; Figure 11 This is a schematic diagram of the chip assembly involved in Embodiment 3 of this utility model; Figure 12 This is a schematic diagram of the imaging device involved in Embodiment 3 of this utility model.

[0071] In this embodiment, the component names that are the same as those in the above embodiments will continue to be used, the same components will not be described again here, and the corresponding numbers of each component will also continue to be used.

[0072] like Figure 8A , Figure 8B and Figure 9 As shown, in this embodiment, the chip assembly 300 is detachably installed in the imaging device independently of the developing cartridge body (all components of the developing cartridge 11 except for the chip assembly 300). That is, the chip assembly 300 is separately disposed from the developing cartridge body, and the chip assembly 300 is used to establish a communication connection between the developing cartridge body and the imaging device. The chip assembly 300 is detachably installed in the chip assembly mounting part 401 in the imaging device, and the chip assembly mounting part 401 has a receiving space 4011 for accommodating the chip assembly 300.

[0073] Furthermore, in this embodiment, the developing cartridge body and the drum cartridge 12 are first combined and then installed together into the imaging device, and then the chip assembly 300 is installed into the imaging device. When the developing cartridge 11 is disassembled, the developing cartridge body can take the chip assembly 300 out with it. In some embodiments, the chip assembly 300 can be installed first, and then the combination of the developing cartridge body and the drum cartridge 12 can be installed.

[0074] In some embodiments, the ink cartridge 11, which is one of the imaging material cartridges, will be used as an example for illustration.

[0075] like Figure 10 , Figure 11 and Figure 12 As shown, the chip assembly 300 is installed independently of the ink cartridge body (all components of the ink cartridge 11 except for the chip assembly 300) into the ink cartridge mounting section 4111a of the imaging device PM.

[0076] Furthermore, an elastic element 3181 is provided between the chip 32 and the chip holder 31, the elastic element 3181 being used to ensure a stable electrical connection between the chip 32 and the contact pin 403. Even further, the elastic element 3181 can be a spring, sponge, rubber, felt, etc.

[0077] Furthermore, when disassembling the ink cartridge body, the chip assembly 300 can be taken out along with it. After both the chip assembly 300 and the ink cartridge body are installed in the imaging device PM, the chip assembly 300 does not come into contact with the ink cartridge body. Only during the disassembly of the ink cartridge 11 does the chip assembly 300 come into contact with the ink cartridge body, allowing it to be taken out along with the ink cartridge body. After the ink cartridge 11 is disassembled, the chip assembly 300 can be easily removed from the ink cartridge body.

[0078] In the above embodiments, the developing cartridge body and the ink cartridge body can be collectively referred to as the imaging material cartridge body.

[0079] Example 4

[0080] Figure 13AThis is a perspective view of the developing cartridge according to Embodiment 4 of this utility model; Figure 13B This is a plan view of the developing roller and the photosensitive drum after the developing cartridge is installed into the drum cartridge, according to Embodiment 4 of this utility model. Figure 14 This is a side view of the developing cartridge involved in Embodiment 4 of this utility model, viewed along the longitudinal direction; Figure 15A This is a side view taken along the longitudinal direction when the developing roller in the developing cassette and the photosensitive drum in the drum cassette are close to each other, according to Embodiment 4 of this utility model. Figure 15B This is a side view taken along the longitudinal direction when the developing roller in the developing box and the photosensitive drum in the drum box are separated from each other, according to Embodiment 4 of this utility model.

[0081] This embodiment provides another separable component 13, such as Figure 13A , Figure 14 , Figure 15A and Figure 15B As shown, the separating component 13 includes a main body 1310, a force receiving member 131, and a force applying member 1326. The main body 1310 is fixedly disposed relative to the first housing 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 electrophotographic imaging device. The force applying member 1326 is also connected to the main body 1310. Through the force applying member 1326, the force F is applied to the force receiving part outside the developing cartridge 11, and then the force receiving part reacts to the force applying member 1326, causing the first housing 111 to move relative to the drum cassette 12 / second housing 121 / photosensitive drum 14. The force receiving part can be, for example, the first abutment part 1211 and the second abutment part 1212 (e.g., ...). Figure 5 (as shown) at least one of them, or it can be another component disposed in the drum box 12 or a component in the electrophotographic imaging device PM.

[0082] This embodiment will focus on a component located in the electrophotographic imaging device PM as an example of a force-bearing part. First, refer to... Figure 15A and Figure 15B The electrophotographic imaging device PM is also provided with a laser PM1 for emitting a laser beam carrying imaging information onto the surface of the photosensitive drum 14. When the developing cartridge 11 / processing cartridge 100 is installed in a predetermined position of the electrophotographic imaging device PM, the laser PM1 is opposite to the photosensitive drum 14. In this way, the laser PM1 can emit a laser beam onto 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.

[0083] The force receiving member 131 is provided with a force receiving part 1311 for receiving force F. The force applying part 1326 can be integrally formed with the force receiving part 131 or separately formed, as long as the force applying part 1326 can move in response to the movement of the force receiving part 1311 relative to the drum box 12 / second box 121 / photosensitive drum 14.

[0084] In some embodiments, the force receiving part 1311 is a plane disposed on the force receiving member 131, and the plane is configured such that when the force applying member 1 begins to apply force F to the separating member 13, the plane is perpendicular to the direction of force F, which can ensure that force F is applied to the plane more effectively, thereby improving the separation efficiency.

[0085] In some embodiments, the laser PM1 is configured to move with the movement of the door cover; for example, when the door cover gradually closes, the laser PM1 moves towards the photosensitive drum 14, and when the door cover gradually opens, the laser PM1 moves away from the photosensitive drum 14; the force-applying member 1 has, for example, Figure 14 The first position A, the second position B, and the third position C are shown. In the first position A, the door cover is open. In the second position B, the door cover is closed and the developing roller 15 and the photosensitive drum 14 are close to each other. In the third position C, the door cover is closed and the force-applying member 1 is about to apply force F to the separating member 13.

[0086] The main body 1310, force receiving member 131, and force applying member 1326 can be formed integrally or separately, but the force applying member 1326 always protrudes from the main body 1310, such as... Figure 14 As shown, when viewed along the longitudinal direction, the force-applying part 1326 protrudes from the first box body 111.

[0087] In some embodiments, the force-applying part 1326 has an arc-shaped force-applying surface 1329, which helps protect the force-receiving part and prevents it from being damaged due to excessive force concentration; the force-applying part 1326 and the force-receiving part will form a line contact, and when viewed along the longitudinal direction, the position where the force-applying part 1326 / force-applying surface 1329 abuts against the force-receiving part will form an abutment point D, such as Figure 15A As shown, when the developing cartridge 11 / processing cartridge 100 is installed in the predetermined position of the imaging device, the force-applying part 1326 / force-applying surface 1329 contacts the laser PM1, which is the force-receiving part, so that the force F applied by the force-applying member 1 can be transmitted to the laser PM1 more efficiently.

[0088] In some embodiments, when the developing cartridge 11 / processing cartridge 100 is installed in a predetermined position of the imaging device, the force-applying part 1326 / force-applying surface 1329 and the laser PM1, which is the force-receiving part, may not be in contact, and the gap between them may be in the range of 0.1mm-10mm. In this way, as the laser PM1 moves toward the photosensitive drum 14, interference between the laser PM1 and the force-applying part 1326 can be prevented.

[0089] As described above, when the force-applying member 1 applies force F to the separation member 13, the force-applying part 1326 transmits force F to the laser PM1. Subsequently, the laser PM1 applies a reaction force to the force-applying part 1326. This reaction force forces the separation member 13 to move the first housing 111 relative to the drum housing 12 / second housing 121 / 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.

[0090] Specifically, in some embodiments, under the action of the reaction force, the first box 111 will move around the contact point D along... Figure 15B The roller rotates in the direction shown by r4, that is, the part behind the contact point D moves upward and the part in front of the contact point D moves downward, the developing roller 15 and the photosensitive drum 14 separate from each other, and a second gap g is formed between them.

[0091] In some embodiments, under the action of the reaction force, in the first mounting space 141e (e.g. Figure 3 Under the guidance of the first housing 111 (as shown), the developing roller 15 and the photosensitive drum 14 move backward as a whole, and the developing roller 15 and the photosensitive drum 14 separate from each other, forming a second gap g between them.

[0092] Thus, under the action of the reaction force, the first cartridge 111 is guided by the guide part outside the developing cartridge, and can rotate or slide, but ultimately can separate the developing roller 15 and the photosensitive drum 14. The guide part can be, for example, the first mounting space 141e mentioned above, or a guide space set in the imaging device. Specifically, the specific shape of the guide part should not be limited, and it can be either straight or curved.

[0093] In some embodiments, the force-applying surface 1329 extends in the longitudinal direction, thereby increasing the contact area between the force-applying surface 1329 and the force-receiving part and improving the separation efficiency.

[0094] In some embodiments, a first auxiliary line m1 is defined as a straight line passing through the contact point D and parallel to the direction of force F. A second auxiliary line m2 and a third auxiliary line m3, parallel to the first auxiliary line m1, are drawn along the front and rear directions, respectively passing through the front and rear end points of the developing cartridge 11. A first region Q1 is formed between the first auxiliary line m1 and the second auxiliary line m2, and a second region Q2 is formed between the first auxiliary line m1 and the third auxiliary line m3. The developing roller 15 is located in the first region Q1, and the force receiving part 1311 is located in the second region Q2. Along a direction perpendicular to the direction of force F (e.g., the front and rear direction), the length of the first region Q1 is n1, and the length of the second region Q2 is n2.

[0095] In some implementations, n2 > n1, so that the imaging device only needs to apply a small force F to change the developing roller 15 and the photosensitive drum 14 from a state of being close to each other to a state of being separated from each other; for example Figure 15A As shown, along the front-to-back direction, the force receiving part 1311, the force applying part 1326 / force applying surface 1329 / contact point D, and the developing roller are arranged sequentially from back to front. Obviously, the closer the force receiving part 1311 is to the third auxiliary line m3, the higher the separation efficiency of the developing roller 12 and the photosensitive drum 22.

[0096] In some embodiments, the separation component 13, the first box 111, and the support 113 can be formed as a single unit, any two of them can be formed as a single unit, or they can be formed separately as three independent components.

[0097] As described above, when the developing cartridge 11 is installed into the drum cartridge 12, the pushing member in the drum cartridge 12 applies a pushing force to the pushing portion in the developing cartridge 11, allowing the developing roller 15 and the photosensitive drum 14 to remain close to each other. Therefore, under the action of the reaction force, when at least a portion of the first cartridge 111 moves backward, causing the developing roller 15 and the photosensitive drum 14 to change from a close-to-each-other state to a separated state, the drum cartridge 12 may also move along with the developing cartridge 11. This could potentially cause the photosensitive drum 14 to deviate from the recording medium. For this reason, in some embodiments, the developing cartridge 11 further includes a drum cartridge limiting portion 136 for restricting the movement of the drum cartridge 12 along with the developing cartridge 11. The drum cartridge limiting portion 136 is movable along with the movement of the first cartridge 111. Figure 15A and Figure 15B As shown, under the action of the reaction force, when the first cartridge 111 rotates or slides, 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, the drum box limiting part 136 abuts against the drum box 12, thereby restricting the movement of the drum box 12 following the developing cartridge 11.

[0098] In some embodiments, a power transmission element 144 is also provided at the longitudinal end of the photosensitive drum 14. The power transmission element 144 receives power from the imaging device through electrical contact with the imaging device and supplies it to the photosensitive drum. When the drum box 12 is restricted by the drum box limiting part 136, the power transmission element 144 will be able to maintain stable electrical contact with the imaging device.

[0099] In some embodiments, at least one of at least a portion of the developing roller 15 and at least a portion of the photosensitive drum 14 overlaps with the force-applying portion 1326 in the front-back direction, thereby controlling the size of the developing cartridge 11 in the direction intersecting the front-back direction. This design is beneficial for miniaturizing the developing cartridge 11 / processing cartridge 100.

[0100] In some embodiments, the separating member 13 may be disposed at least on one of the driving end and the non-driving end. When the separating member 13 is disposed only on one of the driving end and the non-driving end, under the action of force F, the developing roller 15 and the photosensitive drum 14 may present a separation as follows: Figure 13B As shown, under sufficiently large force F, the developing roller 15 and the photosensitive drum 14 will completely separate in the longitudinal direction.

[0101] In some embodiments, the force-bearing part can also be other components of the imaging device, such as the top cover or side cover of the imaging device. The force-bearing part can also be part of the drum box 12, such as an extension protrusion extending from the second box body 121, and the force-applying part 1326 can abut against the extension protrusion.

[0102] During the movement of the developing cartridge 11 relative to the drum cartridge 12, causing the developing roller 15 and the photosensitive drum 14 to change from a state of close proximity to a state of separation, the chip 32 may move towards the contact pin 403, thereby further compressing the contact pin 403. Over time, not only may the contact pin 403 undergo irreversible deformation, but the force exerted on the chip 32 by the contact pin 403 will also increase, resulting in unstable electrical contact between the chip 32 and the contact pin 403, and damage to the chip 32. As described in Embodiment 3, when an elastic element is provided between the chip 32 and the chip holder 31, not only can the chip 32 and the contact pin 403 be kept in an elastic electrical contact state, but also during the movement of the first cartridge 111 relative to the second cartridge 121, the chip 32 can move away from the contact pin 403, thereby reducing the compressive force 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.

[0103] As described in Embodiment 3 above, the chip assembly 300 is separately disposed from the developing cartridge body, and the chip assembly 300 can be detachably connected to the developing cartridge body. When the developing cartridge 11 is removed from the imaging device, the developing cartridge body can take the chip assembly 300 out with it. However, during the transition between the developing roller 15 and the photosensitive drum 14 being close to each other and being separated from each other, the first cartridge body 111 will not drive the chip assembly 300 to move. In some embodiments, the chip assembly 300 can also be configured such that when the developing cartridge 11 is removed from the imaging device, the developing cartridge body cannot take the chip assembly 300 out with it. In this modified mode, there is no connection between the chip assembly 300 and the developing cartridge body, and during the transition between the developing roller 15 and the photosensitive drum 14 being close to each other and being separated from each other, the first cartridge body 111 will not drive the chip assembly 300 to move.

[0104] Example 5

[0105] Figure 16 This is a schematic diagram of the non-driving end of the developing cartridge according to Embodiment 5 of this utility model; Figure 17A This is a side view taken along the longitudinal direction when the developing roller in the developing cassette and the photosensitive drum in the drum cassette are close to each other, according to Embodiment 5 of this utility model. Figure 17B This is a side view taken along the longitudinal direction when the developing roller in the developing cassette and the photosensitive drum in the drum cassette are separated from each other, according to Embodiment 5 of this utility model. Figure 18 This is a perspective view of the developing cartridge involved in Embodiment 5 of this utility model, viewed from bottom to top.

[0106] like Figure 16 As shown, the developing cartridge 11 involved in this embodiment is still provided with a separation mechanism 13. Similarly, the separation mechanism 13 can be provided at least one of the driving end and the non-driving end.

[0107] As described above, the developing cartridge 11 and the drum cartridge 12 are compatible. The drum cartridge 12 is provided with a cartridge-side force-applying member 124. The specific structure of the cartridge-side force-applying member 124 is as described above and will not be repeated here. When the force-applying member 124 rotates around... Figure 17A When the rotation axis L4 rotates in the direction shown by r3, the force-applying member 1 abuts against the first part 124a, and force F is applied to the first part 124a. The force-applying member 124 on the box side rotates around... Figure 17A The rotation axis L3 rotates along the direction shown by r2, and the second part 124b pushes the separation member 13, thereby causing the first housing 111 to move away from the photosensitive drum 14. Both the rotation axis L3 and the rotation axis L4 are parallel to the left-right direction. Figure 17B As shown, a second gap g is formed between the developing roller 15 and the photosensitive drum 14.

[0108] Continue as Figure 17A As shown, when viewed along the longitudinal direction, the second part 124b is formed as a polygonal body, including a first side 124b1, a second side 124b2, and a third side 124b3. The two ends of the second side 124b2 are connected to the first side 124b1 and the third side 124b3, respectively. The first side 124b1 and the second side 124b2 intersect at the first intersection point D1, and the second side 124b2 and the third side 124b3 intersect at the second intersection point D2. Along the rotation direction r2 of the box-side force-applying member 124, the first intersection point D1 is located downstream of the second intersection point D2 / second side 124b2.

[0109] In this embodiment, the separating member 13 includes a force receiving member 131 having a force receiving portion 1311, wherein the force receiving portion 1311 is configured as a plane that at least partially faces forward, such as... Figure 17AAs shown, when the developing cartridge 11 is developing in the imaging device, the developing roller 15 and the photosensitive drum 14 are close to each other, and the plane of the force receiving part 1311 is opposite to the first intersection point D1.

[0110] In some embodiments, when the developing cartridge 11 is being developed in the imaging device, the force receiving part 1311 may also be opposite to the second side 124b2.

[0111] like Figure 17B As shown, when the developing cartridge 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 shown by r3, thereby driving the cartridge-side force-applying member 124 / second part 124b to rotate around the rotation axis L3 in the direction shown by r2, until the force receiving part 1311 is opposite to the second intersection point D2. As the cartridge-side force-applying member 124 continues to rotate, the second part 124b pushes the force receiving member 131, causing the first cartridge body 111 to drive the developing roller 15 to move away from the photosensitive drum 14. The state in which the developing roller 15 and the photosensitive drum 14 are close to each other changes to a state in which they are separated, and a second gap g is formed between them.

[0112] As described above, by setting the force receiving part 1311 to be at least partially facing forward, during the rotation of the second part 124b in the direction indicated by r2, the force receiving part 1311 changes from being opposite to the first intersection point D1 to being opposite to the second intersection point D2, without having to completely cross the second intersection point D2, so that the force receiving part 1311 is opposite to the third side 124b3. This helps to reduce the force F required to be applied to the force applying member 1. As a result, 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 in a state of being close to each other and a state of being separated from each other, respectively, the force receiving part 1311 is opposite to both ends of the same surface of the cartridge-side force applying member 124.

[0113] In some embodiments, when the developing roller 15 and the photosensitive drum 14 are in a state of being close to each other and a state of being separated from each other, the force receiving part 1311 may not be opposite to the first intersection point D1 and the second intersection point D2, but rather opposite to two different positions of the second side 124b2, which are located between the first intersection point D1 and the second intersection point D2. Thus, the force receiving part 1311 can also be regarded as being opposite to the two ends of the same surface of the cartridge-side force-applying member 124.

[0114] It should be noted that when the developing roller 15 and the photosensitive drum 14 are close to each other, the force receiving part 1311 facing the first intersection point D1 and the force receiving part 1311 facing the second side 124b2 should be understood as either being in contact with each other or being spaced apart from each other. When the developing roller 15 and the photosensitive drum 14 are separated from each other, the force receiving part 1311 facing the second intersection point D2 and the force receiving part 1311 facing the second side 124b2 should be understood as being in contact with each other. In some embodiments, such as Figure 16 As shown, the developing cartridge 11 also includes an end cap (right end cap) 110 disposed at the right end (non-driving end) of the first cartridge body 111. The end cap 110 is fixedly disposed relative to the first cartridge body 111, and the separating member 13 is also fixedly disposed relative to the first cartridge body 111. For example, the end cap 110 is fixedly installed on the first cartridge body 111, and the separating member 13 is fixedly installed on at least one of the first cartridge body 111 and the end cap 110.

[0115] In some embodiments, the developing cartridge 11 further includes a powder filling port cover 1119a for sealing the powder filling port 111b, which allows developer to be added to the first cartridge 111; the powder filling port cover 1119a includes a cover body 1119a1 and at least one of a locking part 101 and a forced push part (e.g., a right forced push part 1115R) disposed on the cover body 1119a1, wherein the locking part 101 is used to cooperate with a locking member in the drum cartridge 12 such that the developing cartridge 11 is locked in the drum cartridge 12, and the right forced push part 1115R is forced by the right forced push member 123R such that the developing roller 15 and the photosensitive drum 14 are kept in a close proximity to each other.

[0116] In some embodiments, to facilitate easier installation of the developing cartridge 11 into or removal of the drum cartridge 12, the drum cartridge 12 is further provided with an auxiliary mounting component (not shown), such as a rotating wheel. Correspondingly, the developing cartridge 11 is provided with a mating mounting component for engaging with the auxiliary mounting component, such as... Figure 18 As shown, the mating mounting component includes at least one of a left auxiliary component 1117e disposed on the end cover 1117 and a right auxiliary component 1101 disposed on the end cover 110. During the installation and removal of the developing cartridge 11 in the drum housing 12, both the left auxiliary component 1117e and the right auxiliary component 1101 mate with the auxiliary mounting component. Specifically, the left auxiliary component 1117e and the right auxiliary component 1101 are configured as protrusions or ribs. Through the mating of the left auxiliary component 1117e and the right auxiliary component 1101 with the rotating wheel, the rolling action of the rotating wheel makes it easier to install the developing cartridge 11 into the drum housing 12, or to remove the developing cartridge 11 from the drum housing 12.

[0117] 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.

[0118] In some embodiments, the direction in which the force receiving part 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 part 1311 can receive the force F.

[0119] In some embodiments, the force receiving section 1311 is oriented in a direction perpendicular to the 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 section 1311 is minimized.

[0120] Example 6

[0121] Figure 19 This is a schematic diagram of the non-driving end of the developing cartridge according to Embodiment 6 of this utility model; Figure 20A This is a side view taken in the vertical direction when the developing roller in the developing cassette and the photosensitive drum in the drum cassette are close to each other, according to Embodiment 6 of this utility model. Figure 20B This is a side view taken in the vertical direction when the developing roller in the developing cassette and the photosensitive drum in the drum cassette are separated from each other, according to Embodiment 6 of this utility model.

[0122] Based on Example 1, this example further optimizes the structure of the separation component 13.

[0123] First refer to Figure 20A As shown, the force-applying member 1 is configured as a cylinder. The end of the force-applying member 1 used to apply force F to the separating member 13 has a corner portion 1a. The end face 1b of the force-applying member is arranged adjacent to the corner portion 1a. On the one hand, during the process of the developing roller 15 and the photosensitive drum 14 separating and approaching each other multiple times, the separating member 13 will continuously rub against the corner portion 1a, which may lead to wear of the separating member 13, resulting in a reduction in the force F applied by the force-applying member 1 to the separating member 13. Finally, the developing roller 15 and the photosensitive drum 14 fail to separate from each other. On the other hand, in the existing solution, the separating 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 result in the separation of the developing roller 15 and the photosensitive drum 14 being insignificant after the force-applying member 1 applies a separation force to the separating member 13.

[0124] like Figure 19As shown, the force receiving part 1311 in this embodiment includes a first surface 1311a, a second surface 1311b, and a third surface 1311c. The third surface 1311c is located between the first surface 1311a and the second surface 1311b. In the longitudinal direction, the second surface 1311b is at least a portion further away from the first housing 111 than the first surface 1311a. When the developing roller 15 and the photosensitive drum 14 are close to each other, the force applying member 1 is opposite to the first surface 1311a in the longitudinal direction. When the developing roller 15 and the photosensitive drum 14 are separated from each other, the force applying member 1 is opposite to the second surface 1311b in the longitudinal direction, and the end face 1b of the force applying member abuts against the second surface 1311b.

[0125] In some embodiments, the third surface 1311c is configured to be non-planar, thereby enabling the force-applying member 1 to more smoothly transition from a state opposite to the first surface 1311a to a state opposite to the second surface 1311b.

[0126] In some embodiments, the first surface 1311a is configured as a curved surface. The distances between the two ends of the first surface 1311a in the lateral direction (the front end and the rear end, which are spaced apart from each other) and the first housing 111 in the longitudinal direction are different. Specifically, the distance between the front end of the first surface 1311a and the first housing 111 in the longitudinal direction is greater than the distance between the rear end of the first surface 1311a and the first housing 111 in the longitudinal direction. The front end and the rear end are spaced apart from each other. During 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-applying member 1, and avoid the contact between the force-applying 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.

[0127] In some implementations, continue as Figure 19 As shown, in the vertical direction, the first surface 1311a has an upper end 1311d and a lower end 1311e spaced apart from each other. In the longitudinal direction, the distance from the upper end 1311d to the first housing 111 is less than the distance from the lower end 1311e to the first housing 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 changing from a state of separation to a state of proximity.

[0128] like Figure 20AAs shown, when the developing roller 15 and the photosensitive drum 14 are close to each other, the force-applying member 1 / corner portion 1a is opposite to the first surface 1311a. The corner portion 1a can be spaced apart from the first surface 1311a or in contact with it. As the force-applying member 1 moves forward, the corner portion 1a and the first surface 1311a are pressed against each other. Through the force-applying member 1, the first cartridge 111 moves to the left in the longitudinal direction and abuts against the first contact portion 1211 on the right pressing surface 1327R. The first cartridge 111 moves backward, and the developing roller 15 and the photosensitive drum 14 gradually separate from each other.

[0129] As described above, since the third surface 1311c is set to be non-planar, the force-applying member 1 can smoothly pass over 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 face 1b of the force-applying member is opposite to the second surface 1311b in the longitudinal direction, and the first housing 111 is held away from the photosensitive drum 14. Accordingly, the developing roller 15 and the photosensitive drum 14 remain in a state of separation from each other.

[0130] In some embodiments, the second surface 1311b is configured as a plane that matches the end surface 1b of the force-applying member, thereby enabling the developing roller 15 and the photosensitive drum 14 to be held more stably in a state of separation from each other, while also preventing scratches from appearing on the force receiving part 1311, so that the developing roller 15 and the photosensitive drum 14 can be held in an effective state of separation from each other.

[0131] In some embodiments, the first surface 1311a may also be configured as an inclined surface that is tilted relative to the longitudinal direction. Preferably, the distance between the front end of the first surface 1311a and the first box 111 in the longitudinal direction is greater than the distance between the rear end of the first surface 1311a and the first box 111 in the longitudinal direction.

[0132] Example 7

[0133] Figure 21 This is a perspective view of the developing cartridge according to Embodiment 7 of this utility model, after the end cap and the first cartridge body are separated; Figure 22 This is an exploded view of the driving force transmission component and some components of the developing cartridge in Embodiment 7 of this utility model. Figure 23A This is a plan view of the driving force transmission component in the developing cartridge according to Embodiment 7 of this utility model, viewed from the top to the bottom. Figure 23B This is a plan view of the driving force transmission component in the developing cartridge according to Embodiment 7 of this utility model, viewed from left to right.

[0134] Based on the above embodiments, this embodiment further optimizes the layout of the driving force transmission component 5, such as... Figure 21As shown, the end cap 1117 is provided with an exposure hole 1117f, through which the drive head 18 is exposed. The developing cartridge 11 also includes a bracket 111c disposed at the drive end. In this invention, the bracket 111c disposed at the drive end can be referred to as the left bracket, and the bracket 1113 disposed at the non-drive end can be referred to as the right bracket. Both the left bracket 111c and the right bracket 1113 are fixedly connected to the first cartridge body 111. At least a portion of the driving force transmission component 5 is supported by the left bracket 111c. In the longitudinal direction, a portion of the left bracket 111c forms a clamping space 111h with the left side wall 111g of the first cartridge body 111. A portion of the driving force transmission component 5 is disposed in the clamping space 111h. Thus, in the longitudinal direction, a portion of the driving force transmission component 5 overlaps, thereby, in the direction intersecting with the longitudinal direction, the size of the developing cartridge 11 can be effectively controlled.

[0135] like Figure 22 As shown, along the longitudinal direction, the driving force transmission part 51 passes through the through hole 111d provided on the left bracket 111c. The driving force transmission part 51 includes a first transmission part 511 and a second transmission part 512 arranged coaxially. That is, the first transmission part 511 and the second transmission part 512 are both arranged coaxially with the driving head 18. When the driving head 18 receives driving force, the first transmission part 511 and the second transmission part 512 can be driven simultaneously. The first transmission part 511 is supported by the left bracket 111c, and the second transmission part 512 is supported by the first housing 111. Thus, the possible shaking of the driving force transmission part 51 / driving head 18 can be effectively suppressed.

[0136] At least a portion of the first transmission part 511 and at least a portion of the second transmission part 512 are located on both sides of the left support 111c. Specifically, at least a portion of the first transmission part 511 is located on the left side of the left support 111c, and at least a portion of the second transmission part 512 is located on the right side of the left support 111c. That is, at least a portion of the second transmission part 512 is located in the clamping space 111h.

[0137] In this embodiment, the driving force transmission assembly 5 further includes a first idler wheel 52. The first idler wheel 52 and the first transmission part 511 are both supported by the left bracket 111c. The first transmission part 511 engages with the first driving force receiving part 54, and the first idler wheel 52 engages with the first driving force receiving part 54 and the second driving force receiving part 55 at the same time. Therefore, the driving force received by the driving head 18 can be transmitted sequentially through the first transmission part 511, the first driving force receiving part 54, the first idler wheel 52 and the second driving force receiving part 55, and the developing roller 15 and the powder feeding roller 16 can be driven.

[0138] The third driving force receiving part 57 is disposed in the clamping space 111h, and the third driving force receiving part 57 is engaged with the second transmission part 512. Therefore, the driving force received by the driving head 18 can be directly transmitted to the third driving force receiving part 57 through the second transmission part 512. Finally, the third driving force receiving part 57 drives the stirring mechanism 17 to rotate.

[0139] Compared to the existing method of transmitting driving force from the driving force transmission unit 51 to the third driving force receiving unit 57 via an idler wheel, the rotation direction of the stirring mechanism 17 in this embodiment will be reversed (e.g., in...). Figure 23B The stirring mechanism 17 includes a stirring shaft and stirring blades mounted on the stirring shaft. In this embodiment, the stirring blades are made of a rigid material to more effectively stir the developer.

[0140] like Figure 23A and Figure 23B As shown, along the longitudinal direction, the driving force transmission part 51 has a first end face 51a facing to the right (first box 111), and the third driving force receiving part 57 has a second end face 57a facing to the right (first box 111). When viewed along a direction perpendicular to the longitudinal direction, the first end face 51a and the second end face 57a are flush, and thus, the size of the developing box 11 in the longitudinal direction can be reduced.

[0141] Furthermore, in the lateral direction, both the driving force transmission unit 51 and the third driving force receiving unit 57 are located between the rotation axis L and the electrical contact unit 321, so that the size of the developing cartridge 11 in the lateral direction can also be controlled.

[0142] In some embodiments, the distance between the rotation axis L17 (the rotation axis of the third driving force receiving part 57 and the stirring mechanism 17) and the rotation axis L18 (the rotation axis of the driving head 18) is 5mm-30mm, preferably 8mm-15mm, and more preferably 11.7mm.

[0143] As described above, in the developing cartridge 11 of this embodiment, there is no need to provide an idler wheel between the driving force transmission part 51 and the third driving force receiving part 57. Instead, the driving force is transmitted directly through the second transmission part 512 meshing with the third driving force receiving part 57. This transmission method not only reduces the number of parts in the developing cartridge 11, but also makes the transmission of driving force simpler.

[0144] Example 8

[0145] Figure 24 This is a plan view of the driving force transmission component in the developing cartridge according to Embodiment 8 of this utility model, viewed from left to right. Figure 25This is a plan view of the driving force transmission component in the developing cartridge according to Embodiment 8 of this utility model, viewed from bottom to top.

[0146] Unlike Embodiment 7, the driving force transmission assembly 5 in this embodiment further includes a third idler wheel 56, which engages simultaneously with both the driving force transmission unit 51 and the third driving force receiving unit 57, such as... Figure 22 and Figure 24 As shown, the rotation axis of the drive head 18 is L18, the rotation axis of the first drive force receiving part 54 is L16, the rotation axis of the third idler wheel 56 is L56, and the rotation axis of the third drive force receiving part 57 is L17. The rotation axes L18, L16, L18, L56, and L17 are all parallel to the longitudinal direction.

[0147] Along the transverse direction, the rotation axis L56 is located between the rotation axis L18 and the rotation axis L17. That is, the third idler wheel 56 is closer to the drive head 18 than the third driving force receiving part 57. In this embodiment, the second transmission part 512 does not need to be provided, and the clamping space 111h can be omitted. Therefore, the size of the developing cartridge 11 in the longitudinal direction can be further reduced.

[0148] In some embodiments, the developing cartridge 11 may also be configured such that, in the lateral direction, the distance between the third idler wheel 56 and the drive head 18 and the distance between the third driving force receiving part 57 and the drive head 18 are equal. Specifically, in the lateral direction, the distance between the rotation axis L56 and the rotation axis L18 and the distance between the rotation axis L17 and the rotation axis L18 are equal.

[0149] In some embodiments, along the longitudinal direction, the third idler wheel 56 has a third end face 56a facing to the right (first housing 111), and when viewed along a direction perpendicular to the longitudinal direction, at least one of the first end face 51a and the third end face 56a is not further away from the first housing 111 than the second end face 57a. That is, at least one of the first end face 51a and the third end face 56a is closer to the first housing 111 than the second end face 57a, or the first end face 51a, the third end face 56a and the second end face 57a are flush.

[0150] In some embodiments, when both the third driving force receiving part 57 and the driving force transmitting part 51 are configured as gears, the number of teeth of the third driving force receiving part 57 is greater than the number of teeth of the driving force transmitting part 51, and the diameter of the third driving force receiving part 57 is greater than the diameter of the driving force transmitting part 51, so that the rotational speed of the stirring mechanism 17 is adapted to the working environment of the developing cartridge 11.

[0151] In some embodiments, when the developing cartridge 11 is installed in the predetermined position, the developing cartridge 11 may also be in the following state: the developing roller 15 is located at the bottom of the developing cartridge 100, and the developer can automatically flow toward the developing roller 15 under its own gravity. Thus, the stirring mechanism 17 can be eliminated, and correspondingly, the third driving force receiving part 57 and the third idler wheel 56 can also be eliminated.

[0152] Example 9

[0153] Figure 26 This is a plan view of the powder feeding roller in the developing box according to Embodiment 9 of this utility model, viewed along a direction perpendicular to the longitudinal direction. Figure 27A This is a perspective view of the first cartridge drive end in the developing cartridge according to Embodiment 9 of this utility model; Figure 27B This is a perspective view of the non-driving end of the first cartridge in the developing cartridge according to Embodiment 9 of this utility model.

[0154] Based on the above embodiments, this embodiment focuses on describing the installation method of the powder feeding roller 16, such as... Figure 26 As shown, the powder feeding roller 16 includes a powder feeding roller shaft 162 and a powder feeding layer 161 located radially outside the powder feeding roller shaft 162. Generally, the powder feeding roller shaft 162 is made of a rigid material, and the powder feeding layer 161 is made of a porous material. The powder feeding layer 161 is used to convey developer toward the developing roller 15. In the longitudinal direction, the powder feeding roller shaft 162 includes a left roller shaft 16a located on the left side of the powder feeding layer 161 and a right roller shaft 16b located on the right side of the powder feeding layer 161. One of the left roller shaft 16a and the right roller shaft 16b is provided with a driven part 163 for receiving driving force. The driven part 163 is used to cooperate with the first driving force receiving part 54, so that the powder feeding roller 16 can be driven to rotate.

[0155] In this embodiment, the driven part 163 is disposed on the left roller 16a, and the size (longitudinal length) of the left roller 16a is greater than the size (longitudinal length) of the right roller 16b in the longitudinal direction.

[0156] like Figure 27A and Figure 27B As shown, the developing cartridge 11 also includes a first mounting hole 111e and a second mounting hole 111f provided on the first cartridge body 111, wherein the maximum size of the first mounting hole 111e is larger than the maximum size of the second mounting hole 111f, so that the powder feeding roller 16 can be installed from the larger mounting hole, thus making the installation operation of the powder feeding roller 16 simple.

[0157] In some embodiments, the developing cartridge 11 further includes a first sealing element mounting portion 111g disposed on the first cartridge body 111. The first sealing element mounting portion 111g is used to allow the first sealing element to be installed. Along the longitudinal direction, two first sealing element mounting portions 111g are respectively disposed on both sides of the first cartridge body 111. When assembling the developing cartridge 11, the first sealing element is first installed into the first sealing element mounting portion 111g, and then the developing roller 15 is installed. At the same time, the two longitudinal ends of the developing roller 15 press against the first sealing element, thereby sealing the longitudinal ends of the developing roller 15.

[0158] In some embodiments, a first mounting hole 111e is provided at the driving end, and a second mounting hole 111f is provided at the non-driving end. The second mounting hole 111f is a through hole provided on the mounting body 111i formed extending from the first seal mounting portion 111g.

[0159] In some embodiments, the developing cartridge 11 further includes a second seal disposed in the first mounting hole 111e and the second mounting hole 111f, the second seal being used to seal the two longitudinal ends of the powder feeding roller 16, the radial dimension of the second seal being larger than the maximum dimension of the first mounting hole 111e.

[0160] In some embodiments, the first mounting hole 111e may also be formed by connecting multiple arcs with different radii. In this case, the radial dimension of the second seal should be greater than the maximum radius of the first mounting hole 111e. When the second mounting hole 111f is formed by connecting multiple arcs with different radii, the radial dimension of the second seal should also be greater than the maximum radius of the second mounting hole 111f.

[0161] In some embodiments, the powder delivery layer 161 overlaps with at least a portion of the first seal in a direction perpendicular to the longitudinal direction to improve the sealing of the longitudinal end of the developing cartridge 11.

[0162] In some embodiments, the second seal overlaps at least a portion of the first seal in a direction perpendicular to the longitudinal direction, which can also improve the sealing of the longitudinal end of the developing cartridge 11.

[0163] Example 10

[0164] like Figure 28A , Figure 28B and Figure 29 As shown, Embodiment 10 of this application will be introduced next. The similarities with the above embodiments will not be repeated in this embodiment.

[0165] like Figure 28A , Figure 28B and Figure 29As shown, the developing roller 15 includes a developing roller shaft 152 and a developing layer 151 covering the outer surface of the developing roller shaft 152. The developing layer 151 is used to carry the developer and supply the developer to the photosensitive drum 14 disposed outside the developing cartridge 11. In the longitudinal direction, 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.

[0166] like Figure 28A , Figure 28B and Figure 29 As shown, the developing cartridge 11 is provided with an accessory 154. When the developing roller 15 is separated from the photosensitive drum 14, the accessory 154 is used to cooperate with the photosensitive drum 14 to reduce the squeezing force generated between the photosensitive drum 14 and the developing roller 15.

[0167] like Figure 28A and Figure 28B As shown, the first housing 111 includes sidewalls that are spaced apart from each other along the longitudinal direction. The sidewalls include a left sidewall 111g located at the driving end and a right sidewall 111j located at the non-driving end. Along the longitudinal direction, the developing roller 15 is disposed between the left sidewall 111g and the right sidewall 111j. A clamping space for accommodating the accessory 154 is formed between the developing roller 15 / developing layer 151 and the sidewalls. Specifically, a first clamping space 111k1 is formed between the left end 151a and the left sidewall 111g, and a second clamping space 111k2 is formed between the right end 151b and the right sidewall 111j.

[0168] As can be seen from the above embodiments, the separation member 13 can be disposed at either the driving end or the non-driving end, forcing the developing roller 15 and the photosensitive drum 14 to separate from each other at the end where the separation member 13 is disposed; along the longitudinal direction, the attachment 154 is disposed at the end opposite to the end where the separation member 13 is located, so as to reduce the squeezing force of the developing roller 15 and the photosensitive drum 14 at the end where the attachment 154 is located. That is to say, the attachment 154 is not disposed at the same end as the separation member 13. Specifically, when the separation member 13 is disposed at the driving end, the attachment 154 is disposed at the non-driving end; when the separation member 13 is disposed at the non-driving end, the attachment 154 is disposed at the driving end. Furthermore, when the separation member 13 is disposed at the driving end, the attachment 154 is disposed at the second clamping space 111k2; when the separation member 13 is disposed at the non-driving end, the attachment 154 is disposed at the first clamping space 111k1.

[0169] When the developing cartridge 11 is installed into the drum cartridge 12, the accessory 154 is opposite the photosensitive drum 14 in the transverse direction. The two can be in a state of maintaining a gap or in a state of just contact without generating pressure. Therefore, the diameter of the accessory 154 is not greater than the diameter of the developing layer 151, which can avoid interference with the contact between the developing roller 15 and the photosensitive drum 14. Preferably, the hardness of the accessory 154 is greater than the hardness of the developing layer 151, which can prevent the photosensitive drum 14 from contacting the developing layer 151 when squeezing the accessory 154, thereby damaging the developing roller 15.

[0170] When the developing cartridge 11 is not performing developing operations, the separation member 13 receives the force F applied by the imaging device. At the end where the separation member 13 is located, the developing roller 15 and the photosensitive drum 14 separate from each other. In the longitudinal direction, at the end opposite to the end where the separation member 13 is located, the developing roller 15 and the photosensitive drum 14 are separated through the cooperation of the accessory 154 and the photosensitive drum 14, specifically by the two abutting against each other. Thus, the developing roller 15 and the photosensitive drum 14 are completely separated, and neither the developing roller 15 nor the photosensitive drum 14 will be damaged.

[0171] In some embodiments, when the developing cartridge 11 is not performing developing operations, at the end opposite to the end where the separation member 13 is located, the developing roller 15 and the photosensitive drum 14 are in close contact with each other through the cooperation of the attachment 154, specifically the two abutting against each other. The developing roller 15 and the photosensitive drum 14 can also be in a state of just contact without generating pressure, and neither the developing roller 15 nor the photosensitive drum 14 will be damaged. Compared with not providing the attachment 154, the contact area between the developing roller 15 and the photosensitive drum 14 in this embodiment can be greatly reduced.

[0172] As described above, by setting the attachment 154, when the developing cartridge 11 is not performing developing operations, the separation member 13 receives the force F applied by the imaging device, and the developing roller 15 and the photosensitive drum 14 are completely separated. Alternatively, at the end where the attachment 154 is provided, the developing roller 15 and the photosensitive drum 14 are in just contact but without generating squeezing force. Therefore, neither the developing roller 15 nor the photosensitive drum 14 will be damaged or contaminated, thereby ensuring the imaging effect.

[0173] Example 11

[0174] like Figure 30 As shown, Embodiment 11 of this application will be introduced next. The parts that are the same as those in the above embodiments will not be repeated in this embodiment.

[0175] like Figure 30As shown, when the drive head 18 is projected onto a plane perpendicular to the longitudinal direction, the separation member 13 is located within the projection area K of the drive head 18. Compared to the separation member 13 being located outside the projection area K, in this embodiment, the separation member 13 will be located further away from the rotation axis L of the developing roller 15 along the direction intersecting the longitudinal direction. This design can avoid interference between the separation member 13 and at least a part of the first cartridge 111 / support 1113, making the layout of the developing cartridge 11 more reasonable.

[0176] When the developing cartridge 100 is not performing developing operations, under the premise that the cartridge-side force-applying member 124 in the drum cartridge 12 moves backward the same distance in the front-to-back direction, compared to when the separation member 13 is located outside the projection area K, when the separation member 13 is located inside the projection area K, the separation force received by the separation member 13 can be reduced. Correspondingly, at the end where the separation member 13 is not provided, the contact force between the photosensitive drum 14 and the accessory 154 can be reduced, and the degree of wear on the surface of the photosensitive drum 14 can be reduced. After the photosensitive drum 14 and the developing roller 15 are separated from each other at the end where the separation member 13 is provided, if the photosensitive drum 14 and the developing roller 15 are still in contact at the end where the separation member 13 is not provided, the contact force between the photosensitive drum 14 and the developing roller 15 can also be reduced.

Claims

1. A developing cartridge, detachably installed into a drum cartridge, the developing cartridge being detachably installed into an imaging device together with the drum cartridge, the drum cartridge being provided with a cartridge-side force-applying member for abutting against a force-applying member, characterized in that, The developing cartridge includes: The first housing is used to contain the developer; The developing roller is used to carry the developer and to contact the photosensitive drum outside the developing cassette for developing and imaging. A powder feeding roller is rotatably disposed in a first housing, and the powder feeding roller includes a powder feeding roller shaft and a powder feeding layer located radially outside the powder feeding roller shaft; The separation member has a force receiving part for receiving the force applied by the cartridge-side force applying member. The force receiving part abuts against the cartridge-side force applying member, causing the first cartridge body to move relative to the photosensitive drum, and the developing roller and the photosensitive drum to change from a state of being close to each other to a state of being separated from each other. When the developing roller and the photosensitive drum are in two states, one close to each other and the other separated, the force receiving part is opposite to the two ends of the same surface of the force-applying part on the cartridge side.

2. The developing cartridge according to claim 1, characterized in that, The force receiving part is set as a plane parallel to the longitudinal direction.

3. The process cartridge of claim 1, wherein the cartridge The side-applying force member has 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, and the side-applying force member rotates around the third part; When viewed along the longitudinal direction, the second part is formed as a polygonal body, including a first side, a second side, and a third side. The two ends of the second side are connected to the first side and the third side, respectively. The first side and the second side intersect at a first intersection point, and the second side and the third side intersect at a second intersection point. Along the rotation direction of the force-applying component on the side of the box, the first intersection point is located downstream of the second intersection point. When the developing roller and the photosensitive drum are close to each other, the force receiving part is opposite to the second side. When the developing roller and the photosensitive drum are separated, the force receiving part is opposite to the third side.

4. The process cartridge of claim 1, wherein the cartridge The side-applying force member has 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, and the side-applying force member rotates around the third part; When viewed along the longitudinal direction, the second part is formed as a polygonal body, including a first side, a second side, and a third side, wherein the two ends of the second side are connected to the first side and the third side respectively; the first side and the second side intersect at a first intersection point, and the second side and the third side intersect at a second intersection point. Along the rotation direction of the force-applying component on the side of the box, the first intersection point is located downstream of the second intersection point. In both the developing roller and the photosensitive drum being close to each other and separated from each other, the force receiving part is opposite to two different positions on the second side, and the two different positions are located between the first intersection point and the second intersection point.

5. The developing cartridge according to claim 3 or 4, characterized in that, The powder feeding roller shaft includes a left roller shaft located on the left side of the powder feeding layer and a right roller shaft located on the right side of the powder feeding layer. In the longitudinal direction, the longitudinal length of the left roller shaft is greater than that of the right roller shaft.

6. The process cartridge according to claim 3 or 4, wherein The developing cartridge also includes a first mounting hole and a second mounting hole disposed in the first cartridge body, and a second sealing member disposed in the first mounting hole and the second mounting hole, the second sealing member being used to seal the two longitudinal ends of the powder feeding roller.

7. The process cartridge according to claim 6, wherein, The maximum size of the first mounting hole is greater than the maximum size of the second mounting hole.

8. The process cartridge according to claim 7, wherein, The developing cartridge includes a first sealing element mounting portion disposed on the first cartridge body, and a first sealing element mounted on the first sealing element mounting portion.

9. The developing cartridge according to claim 8, characterized in that, Along a direction perpendicular to the longitudinal direction, the powder feeding layer overlaps with at least a portion of the first seal.

10. The process cartridge of claim 8, wherein, In a direction perpendicular to the longitudinal direction, the second seal overlaps at least a portion of the first seal.

Images