Developing and processing cartridges

Abstract

The developing cartridge is detachably installed into a drum cartridge, the drum cartridge includes a drum frame and a photosensitive drum and a pusher provided on the drum frame, a surface of the photosensitive drum is used for forming an electrostatic latent image, and the pusher is used for pushing at least a part of the developing cartridge; the developing cartridge includes a housing, a developing roller rotatably supported by the housing, and a bracket respectively located at two longitudinal ends of the housing, the housing is used for containing toner, the developing roller is used for externally supplying the toner, and the bracket is used for at least supporting the developing roller; the bracket includes a bracket main body, a pushed part connected with the bracket main body, and a recess provided on the bracket main body, the pushed part is used for receiving a pushing force, so that the developing roller maintains contact with the photosensitive drum; at least a part of the pushed part is opposite to the recess in a direction in which the pushed part is pushed by the pusher, and the utility model provides a process cartridge, so that miniaturization of the housing of the developing cartridge is realized.

Description

Technical Field

[0001] This utility model relates to the field of electronic photographic imaging device technology, and in particular to a processing box. Background Technology

[0002] A processing cartridge is a consumable that can be detachably installed in an electrophotographic imaging device (hereinafter referred to as "imaging device"). The processing cartridge includes a drum box and a developing cartridge that can be detachably installed in the drum box. The drum box is provided with a photosensitive drum for forming an electrostatic latent image on its surface. The developing cartridge is provided with a developing roller for supplying toner to the photosensitive drum. When the processing cartridge performs imaging operations, the developing roller must be in contact with the photosensitive drum.

[0003] In order to ensure good contact between the developing roller and the photosensitive drum, the prior art has a force receiving part on the developing cartridge to receive the pushing force from the drum box. The force receiving part protrudes outward from the end face of the developing cartridge housing. However, this design is not conducive to the miniaturization of the housing. Utility Model Content

[0004] This utility model provides a processing cartridge to achieve miniaturization of the developing cartridge housing. The specific solution is as follows:

[0005] A developing cartridge is detachably installed into a drum housing, the drum housing including a drum frame and a photosensitive drum and a pusher mounted on the drum frame. The surface of the photosensitive drum is used to form an electrostatic latent image, and the pusher is used to push at least a portion of the developing cartridge. The developing cartridge includes a housing, a developing roller rotatably supported by the housing, and supports located at two longitudinal ends of the housing. The housing is used to contain toner, the developing roller is used to supply toner outward, and the supports are used to support at least the developing roller. The supports include a support body, a pusher connected to the support body, and a recess disposed in the support body. The pusher is used to receive a pushing force, so that the developing roller remains in contact with the photosensitive drum. At least a portion of the pusher is opposite to the recess along the direction in which the pusher pushes the pusher.

[0006] In some embodiments, the bracket is provided with an ear connected to the bracket body, the forced push portion is provided with a forced push surface, and the ear is provided with a support surface for supporting the forced push portion, the support surface intersecting with the forced push surface.

[0007] In some embodiments, the angle formed by the intersection of the support surface and the forced pushing surface is greater than 90 degrees.

[0008] In some embodiments, the developing cartridge is provided with a drive member that receives driving force from the device, and the housing is provided with a support post for supporting the drive member, at least a portion of which is located in a recess.

[0009] In some embodiments, the recess and the support column are spaced apart.

[0010] In some embodiments, the recess of the bracket disposed on the same side as the drive member is configured as C-shaped.

[0011] In some embodiments, the developing cartridge is further provided with a chip assembly that establishes a communication connection with the outside world. The chip assembly is connected to the housing, and along the front-back direction, the chip assembly and the developing roller are located on opposite sides of the housing, with the developing roller located on the front side of the housing.

[0012] A processing cartridge, detachably mounted to an imaging device, including a drum cartridge and a developing cartridge as described in any one of the preceding claims, the developing cartridge being detachably mounted to the drum cartridge. Attached Figure Description

[0013] Figure 1 This is a perspective view of the developing cartridge involved in this utility model.

[0014] Figure 2 This is an exploded view of the developing cartridge of this utility model after the end cap, drive mechanism, drive bracket and housing are separated after the upper housing is hidden.

[0015] Figure 3 This is a perspective view of the drive bracket involved in this utility model.

[0016] Figure 4 This is a perspective view of the conductive support involved in this utility model. Detailed Implementation

[0017] Figure 1 This is a perspective view of the developing cartridge involved in this utility model; Figure 2 This is an exploded view of the developing cartridge according to this utility model after the upper shell is hidden, and the end cap, driving mechanism, driving bracket and shell are separated. Figure 3 This is a perspective view of the drive bracket involved in this utility model; Figure 4 This is a perspective view of the conductive support involved in this utility model.

[0018] The processing cartridge can be detachably installed into an imaging device (not shown). The processing cartridge includes a drum box (not shown) and a developing cartridge 1 that can be detachably installed into the drum box. The drum box and the developing cartridge 1 are combined with each other. The drum box includes a drum frame, a photosensitive drum, a pusher, and a positioning part. The photosensitive drum, the pusher, and the positioning part are all disposed on the drum frame. The surface of the photosensitive drum is used to form an electrostatic latent image. The positioning part is disposed at both longitudinal ends of the drum frame. The positioning part is used to cooperate with at least a portion of the developing cartridge, so that the developing cartridge 1 is stably installed into the drum box. The pusher is used to push at least a portion of the developing cartridge 1 so that the developing cartridge 1 and the drum box form a more stable contact.

[0019] like Figure 1 , Figure 2As shown, the developing cartridge 1 includes a housing 2, a rotating component 3, a drive mechanism 4 located at the longitudinal end of the housing 2, and a cavity 23. The housing 2 includes an upper housing 21 and a bottom cover 22 joined together. The cavity 23 is located between the upper housing 21 and the bottom cover 22. The cavity 23 / housing 2 is used to contain toner. The drive mechanism 4 receives driving force from the imaging device to drive the rotating component 3 to rotate. The rotating component 3 extends along the longitudinal direction of the developing cartridge and is rotatably supported by the housing 2. The rotating component 3 includes, but is not limited to, a mechanism for supplying toner externally. The developing roller 31, the powder feeding roller 32 which contacts the developing roller 31 and is used to feed toner to the developing roller 31, and the stirring member 33 which is used to stir the toner and feed toner toward the powder feeding roller 32, wherein the developing roller 31 rotates about a first rotation axis L1, the powder feeding roller 32 rotates about a second rotation axis L2, and the driving mechanism 4 is provided with a driving member 41 for receiving driving force from the imaging device. The driving member 41 rotates about a third rotation axis L3, and the first rotation axis L1, the second rotation axis L2 and the third rotation axis L3 are parallel to each other.

[0020] The developing cartridge 1 also includes a handle 5, which allows the user to install and remove the developing cartridge 1. The handle 5 can be located on the upper housing 21 or the bottom cover 22. For ease of description, the direction parallel to the first rotation axis L1 is defined as the longitudinal direction / left-right direction. The developing cartridge 1 also has a transverse direction / front-back direction intersecting the longitudinal direction, and a vertical direction intersecting both the longitudinal and front-back directions, such as... Figure 1 As shown, the upper housing 21 is located above the bottom cover 22. The developing roller 31 and the handle 5 are located on both sides of the housing 2 along the front-back direction, and the developing roller 31 is located in front of the handle 5. Preferably, the left-right direction, the front-back direction and the up-down direction are orthogonal.

[0021] The developing cartridge 1 also includes an end cap 23 installed at the longitudinal end of the housing 2. The end cap 23 can be used to expose at least a portion of the drive member 41. The end cap 23 is provided with a positioning part 231, which is used to cooperate with the positioning part of the drum frame so that the developing cartridge 1 can be stably installed and the developing cartridge 1 can rotate around the positioning part 231.

[0022] In some embodiments, the positioning part 231 is coaxially arranged with the developing roller 31.

[0023] Along the left-right direction, the driving member 41 is disposed at one end of the housing 2. Therefore, the side where the driving member 41 is located can be called the driving side, and the side opposite to the driving side can be called the conductive side. The driving mechanism 4 also includes a developing roller gear 42, a powder feeding roller gear 43, and a stirring member gear 44. The developing roller gear 42 is disposed at the longitudinal end of the developing roller 31 and is used to drive the developing roller 31 to rotate. The powder feeding roller gear 43 is disposed at the longitudinal end of the powder feeding roller 32 and is used to drive the powder feeding roller 32 to rotate. The stirring member gear 44 is disposed at the longitudinal end of the stirring member 33 and is used to drive the stirring member 33 to rotate. The driving member 41 includes a driving force receiving part 41a and a driving gear 41b. The driving force receiving part 41a is used to receive the driving force of the imaging device, and the driving gear 41b is used to transmit the driving force received by the driving force receiving part 41a. The driving gear 41b meshes with the developing roller gear 42, the powder feeding roller gear 43, and the stirring member gear 44 respectively to drive the rotating member 3 to rotate. The driving force receiving part 41a is exposed through the end cover 23.

[0024] The developing cartridge 1 is also provided with a chip assembly 6 for establishing a communication connection with external / imaging equipment. The chip assembly 6 is connected to the housing 2. Along the front-back direction, the chip assembly 6 and the developing roller 31 are located on the two sides of the housing 2, respectively. The developing roller 31 is located on the front side of the housing 2. The chip assembly 6 includes a chip mounting part 61 for mounting the chip. The chip mounting part 61 faces the rear of the housing 2. Therefore, the chip mounted to the chip mounting part 61 is also exposed to the rear of the housing 2, which can reduce the risk of toner falling from the developing roller 31 onto the chip.

[0025] Furthermore, such as Figure 3 As shown, the developing cartridge 1 also includes brackets 7 located at the two longitudinal ends of the housing 2. The brackets 7 are used to support the developing roller 31 at least. Specifically, the brackets 7 include a driving bracket 7a located on the driving side and a conductive bracket 7b located on the conductive side. The basic structure of the driving bracket 7a and the conductive bracket 7b are the same. The structure of the driving bracket 7a is mainly described below.

[0026] The drive bracket 7a includes a bracket body 71, a first support portion 72 rotatably supporting the developing roller 31, and a second support portion 73 rotatably supporting the powder feeding roller 32. The first support portion 72 and the second support portion 73 are disposed on the bracket body 71. The drive bracket 7a is also provided with a forced push portion 74 for receiving forced pushing force. The forced push portion 74 is connected to the bracket body 71. Preferably, the forced push portion 74 is integrally formed with the bracket body 71. The forced push portion 74 is provided with a forced push surface 74a. When the developing cartridge 1 is installed in the predetermined position of the drum cartridge, the forced push portion of the drum cartridge pushes the forced push portion 74 / forced push surface 74a, so that the developing roller 31 keeps in contact with the photosensitive drum.

[0027] In some embodiments, the drive bracket 7a is disposed between the housing 2 and the end cap 23.

[0028] The drive bracket 7a is also provided with an ear 75 connected to the bracket body 71. The ear 75 is adjacent to the forced push part 74. Specifically, the ear 75 extends from the bracket body 71. When the developing cartridge 1 is assembled, the ear 75 is positioned below the forced push part 74. The ear 75 is provided with a support surface 75a for supporting the forced push part. The support surface 75a intersects with the forced push surface 74a. Preferably, the angle formed by the intersection of the support surface 75a and the forced push surface 74a is greater than 90 degrees. After the developing cartridge 1 is installed in the predetermined position of the drum box, when viewed along the direction intersecting with the vertical direction, when the forced push part of the drum box pushes the forced push part 74 from bottom to top, the support surface 75a supports the forced push part more stably.

[0029] The drive bracket 7a has a recess 711 on its bracket body 71. In the direction that the pusher pushes the pusher, at least a portion of the pusher pusher 74 is opposite to the recess 711. When the pusher pushes the pusher pusher 74, the recess 711 absorbs the impact force and plays a buffering role, thereby reducing the contact force between the photosensitive drum and the developing roller 31. In other words, when the pusher pushes the pusher pusher 74, the bracket 7 generates a slight deformation, so that the photosensitive drum and the developing roller 31 can achieve good contact.

[0030] In some embodiments, the housing 2 is provided with a support column 24 for supporting the drive member 41. The support column 24 protrudes from the housing 2 in a direction away from the cavity 23, and the direction in which the support column 24 extends is parallel to the rotation axis of the rotating member 3.

[0031] In some embodiments, at least a portion of the support column 24 is located in the recess 711 of the drive bracket 7a and the two are spaced apart, which can make the structure of the developing cartridge 1 more compact.

[0032] The shape of the recess 711 is not limited, but preferably, the recess 711 of the bracket arranged on the same side as the drive member is C-shaped.

[0033] [Beneficial Effects]

[0034] 1. The forced push part 74 is not provided on the housing 2, which reduces the size of the housing 2; the forced push part 74 is provided on the bracket 7 and is integrally formed with the bracket body 71, thereby improving the strength of the forced push part 74.

[0035] 2. The angle formed by the intersection of the support surface 75a and the forced pushing surface 74a is greater than 90 degrees, which enables them to form a more stable and accurate contact with the forced pushing part of the drum box.

[0036] 3. A recess 711 is provided on the support 7. In the direction of the forced push part pushing the forced push part, at least a part of the forced push part 74 or at least a part of the forced push surface 74a is opposite to the recess 711. When the forced push part pushes the forced push part 74, the recess 711 is slightly deformed, so that the photosensitive drum and the developing roller 31 can achieve good contact.

Claims

1. A developing cartridge, detachably mounted into a drum housing, the drum housing including a drum frame and a photosensitive drum and a pusher disposed on the drum frame, the surface of the photosensitive drum being used to form an electrostatic latent image, and the pusher being used to push at least a portion of the developing cartridge; The developing cartridge includes a housing, a developing roller rotatably supported by the housing, and supports located at two longitudinal ends of the housing. The housing is used to hold toner, the developing roller is used to supply toner to the outside, and the supports are used to support the developing roller at least. Its features are, The support includes a support body, a forced push part connected to the support body, and a recess provided in the support body. The forced push part is used to receive the forced push force so that the developing roller and the photosensitive drum remain in contact. The forced pushing part is pushed along the direction of the forced pushing part, and at least a portion of the forced pushing part is opposite to the recess.

2. The developing cartridge according to claim 1, characterized in that, The bracket is provided with an ear that is connected to the main body of the bracket, the forced push part is provided with a forced push surface, and the ear is provided with a support surface for supporting the forced push part, the support surface intersecting with the forced push surface.

3. The developing cartridge according to claim 2, characterized in that, The angle formed by the intersection of the supporting surface and the forced pushing surface is greater than 90 degrees.

4. The developing cartridge according to claim 1, characterized in that, The developing cartridge is provided with a drive unit that receives driving force from the device, and the housing is provided with a support column for supporting the drive unit, at least a portion of which is located in a recess.

5. The developing cartridge according to claim 4, characterized in that, The recess and the support column are spaced apart.

6. The developing cartridge according to claim 5, characterized in that, The recess of the bracket, which is located on the same side as the drive component, is C-shaped.

7. The developing cartridge according to any one of claims 1-6, characterized in that, The developing cartridge is also equipped with a chip assembly that establishes a communication connection with the outside world. The chip assembly is connected to the housing. Along the front-to-back direction, the chip assembly and the developing roller are located on the two sides of the housing, with the developing roller located on the front side of the housing.

8. A processing box, detachably mounted to an imaging device, characterized in that, Includes a drum housing and a developing cartridge as described in any one of claims 1 to 7, wherein the developing cartridge is detachably mounted to the drum housing.

Images