Developing cartridge

Abstract

The utility model discloses a developing box which comprises a box body, a developing roller and a separating piece, and the separating piece comprises a force receiving part used for receiving separating force of image forming equipment; the rotary supporting part is closer to the developing roller compared with the force receiving part, when the force receiving part receives the separating force of the image forming equipment, the box body rotates by taking the rotary supporting part as a fulcrum, so that the developing roller is separated from the photosensitive drum, and the developing box disclosed by the utility model is simple in separating structure and low in production cost.

Description

Technical Field

[0001] This utility model relates to a developing cartridge for an image forming apparatus. Background Technology

[0002] A processing cartridge is a removable cartridge that is installed in an image forming apparatus. The processing cartridge includes a drum cartridge and a developing cartridge that can be installed within the drum cartridge. The drum cartridge and developing cartridge can be installed as a single unit in the image forming apparatus. The drum cartridge includes a photosensitive drum that generates an electrostatic latent image and a photosensitive frame that supports the photosensitive drum. The developing cartridge includes a developing frame that holds the developer and a developing roller supported on the developing frame and capable of carrying the developer. When the processing cartridge is in operation, the developing roller and the photosensitive drum remain in contact to transfer the developer carried on the developing roller to the photosensitive drum to develop the electrostatic latent image. When the processing cartridge is not in operation, to prevent deformation of the developing roller or contamination of the photosensitive drum due to prolonged contact between the developer carried on the developing roller and the photosensitive drum, the developing roller and the photosensitive drum must be separated. When the processing cartridge is in operation again, the developing roller will once again maintain contact with the photosensitive drum.

[0003] For example, a patent with publication number US11774903B2 discloses a developing cartridge with a separator to separate the developing roller from the photosensitive drum. The separator is a rod movable relative to the housing, comprising a first end and a second end, with a shaft serving as a fulcrum between the first and second ends. A boss is installed in a first hole. The first end receives a driving force, allowing the rod to pivot about the shaft, thereby enabling the second end to abut against the housing, thus separating the developing roller from the photosensitive drum. However, this structure is relatively complex, difficult to assemble, and has high manufacturing costs. Utility Model Content

[0004] This invention provides a developing cartridge with a simple separation structure and low production cost.

[0005] A developing cartridge, detachably mounted to a drum housing having a photosensitive drum, comprising:

[0006] A housing for containing developer has a first outer surface and a second outer surface disposed opposite to each other in a first direction;

[0007] A developing roller, extending along a first direction and located at one end of the housing in a second direction, includes a developing roller body and a developing roller shaft;

[0008] A separator is disposed on the first outer surface. When the separator receives an external force, it can move the developing roller between the contact position where the developing roller contacts the photosensitive drum and the separation position where the developing roller separates from the photosensitive drum.

[0009] The separating element includes:

[0010] A force receiving unit for receiving the separation force of an image forming device, the force receiving unit extending along a first direction;

[0011] The rotating support is closer to the developing roller than the force receiving part. When the force receiving part receives the separation force of the image forming device, the cartridge rotates around the rotating support as a fulcrum, causing the developing roller to separate from the photosensitive drum.

[0012] In one embodiment, the separating member further includes a main body portion, which is plate-shaped and extends along the first outer surface, and the force receiving portion and the rotation support portion are disposed on the main body portion.

[0013] In one embodiment, the main body, the force receiving part, and the rotating support part are integrally formed.

[0014] In one embodiment, the force receiving portion includes a force receiving surface that receives a separation force from the pattern forming apparatus.

[0015] In one embodiment, the force receiving portion further includes a reinforcing portion that extends along a first direction and is connected to the force receiving portion and is angled to the force receiving portion.

[0016] In one embodiment, the rotating support includes a support ramp that abuts against an abutment on the drum when the force receiving surface receives a separation force from the image forming apparatus. The developing cassette rotates about the support ramp as a fulcrum, causing the developing roller to separate from the photosensitive drum. Attached Figure Description

[0017] Figure 1 This is a perspective view of the developing cartridge in one embodiment of the present invention.

[0018] Figure 2 This is a perspective view of the developing cartridge in one embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the developing cartridge separation principle in one embodiment of the present invention;

[0020] Figure 4 In one embodiment of this utility model, the developing box and the drum box are assembled into a single three-dimensional unit.

[0021] Explanation of reference numerals in the attached drawings: 1. Developing cartridge; 10. Cartridge body; 11. First outer surface; 12. Second outer surface; 13. Opening; 20. Developing roller; 21. Developing roller body; 22. Developing roller shaft; 30. Separator; 31. Main body; 32. Force receiving part; 321. Force receiving surface; 322. Reinforcing part; 33. Rotational support part;

[0022] 2. Drum box; 80. Photosensitive drum; 90. Abutment part. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described clearly and completely below with reference to the accompanying drawings. Obviously, the specific details described below are only a part of the embodiments of this utility model, and this utility model can be implemented in many other embodiments different from those described herein. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In this document, when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The directional terms such as "front," "back," "up," and "down" are defined based on the location of the components in the accompanying drawings and their relative positions, and are merely for clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed by this utility model.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0026] In the following description, the direction in which the developing roller extends is referred to as the "first direction." The arrangement direction of one end of the developing frame containing the developing roller and the other end of the developing frame is referred to as the "second direction." The first direction and the second direction intersect each other. Alternatively, the first direction and the second direction may be perpendicular to each other.

[0027] like Figure 1 and Figure 4 As shown, the developing cartridge 1 is used in conjunction with a drum housing 2, which includes a photosensitive drum 80. The developing cartridge 1 can be mounted on the drum housing 2. Furthermore, with the developing cartridge 1 connected to the drum housing 2, the developing cartridge 1 can be connected to an image forming apparatus.

[0028] like Figures 1 to 4 As shown, the developing cartridge 1 includes a cartridge body 10, a developing roller 20, and a separator 30.

[0029] The cartridge 10 is a container for holding developer. The cartridge 10 has a first outer surface 11 and a second outer surface 12. The first outer surface 11 is located at one end of the cartridge 10 in a first direction, while the second outer surface 12 is located at the other end of the cartridge 10 in the first direction. The first outer surface 11 and the second outer surface 12 are spaced apart from each other in the first direction. The cartridge 10 extends along the first direction between the first outer surface 11 and the second outer surface 12, and also extends along a second direction.

[0030] The developing roller 20 is a roller rotatable about a rotation axis extending in a first direction. The developing roller 20 is located at the opening 13 of the housing 10, that is, at one end of the housing 10 in a second direction. The developing roller 20 includes a developing roller body 21 and a developing roller shaft 22. The developing roller body 21 is a hollow cylindrical component extending in the first direction. The developing roller body 21 is made of a material such as elastic rubber. The developing roller shaft 22 is a solid cylindrical component. The developing roller shaft 22 extends in the first direction and penetrates the developing roller body 21 in the first direction. The developing roller body 21 is fixed relative to the developing roller shaft 22. The developing roller shaft 22 is a conductive component. The developing roller shaft 22 is made of metal or conductive resin.

[0031] The separator 30 is detachably mounted on the first outer surface 11 of the housing 10. The separator 30 includes a main body 31, a force receiving part 32, and a rotation support part 33.

[0032] The main body 31 is plate-shaped and unfolds along the first outer surface 11. The main body 31 can be installed onto the first outer surface 11 of the box body 10 by means of screws or clips.

[0033] The force receiving unit 32 is used to receive the separation force from the image forming apparatus. The force receiving unit 32 is disposed on the main body 31 and extends in a first direction. The force receiving unit 32 can be integrally formed with the main body 31.

[0034] The force receiving part 32 includes a force receiving surface 321, which faces the bottom of the developing cartridge.

[0035] The force receiving unit 32 may also be provided with a reinforcing part 322, which extends in the first direction and is connected to the force receiving unit 32 to increase the strength of the force receiving unit 32 and prevent the force receiving unit 32 from deforming or being damaged when receiving the separation force of the image forming device.

[0036] A rotating support portion 33 is disposed on the main body portion 31 and extends in a first direction. The rotating support portion 33 can be integrally formed with the main body portion 31. In a second direction, the rotating support portion 33 is closer to the developing roller 20 than the force receiving portion 32. When the developing cartridge 1 is connected to the drum cartridge 2, the rotating support portion 33 contacts the abutment portion 90 of the drum cartridge 2.

[0037] The rotating support part 33 includes a support slope 331, which contacts the abutment part 90 of the drum box 2.

[0038] When the force receiving surface 321 of the force receiving unit 32 receives the separation force F from the image forming apparatus, the support inclined surface 331 of the rotating support unit 33 abuts against the abutment part 90, and the cassette 10 rotates in the rotation direction R, causing the developing roller 20 to separate from the photosensitive drum 80. When the image forming apparatus removes the separation force F, the developing roller 20 and the photosensitive drum 80 return to the contact state under the action of the elastic force of the pushing elastic device provided on the rear end of the drum cassette 2.

[0039] One end of the developing roller shaft 22 in the first direction is supported by the separator 30. Specifically, one end of the developing roller shaft 22 in the first direction is inserted into a first through hole (not shown) formed on the separator 30 and contacts the separator 30.

[0040] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A developing cartridge detachably mounted to a drum cartridge having a photosensitive drum, comprising: a cartridge body for accommodating a developer, having a first outer surface and a second outer surface disposed opposite each other in a first direction; a developing roller extending in the first direction at one end of the cartridge body in a second direction, including a developing roller body and a developing roller shaft; a separation member disposed on the first outer surface, when the separation member receives an external force, the developing roller is moved between a contact position where the developing roller contacts the photosensitive drum and a separation position where the developing roller is separated from the photosensitive drum; characterized in that the separation member includes: a force receiving portion for receiving a separation force of an image forming apparatus, the force receiving portion extending in the first direction; a rotation support portion closer to the developing roller than the force receiving portion, when the force receiving portion receives the separation force of the image forming apparatus, the cartridge body rotates around the rotation support portion to separate the developing roller from the photosensitive drum.

2. The process cartridge according to claim 1, wherein, The separation member further includes a main body portion, the main body portion is plate-shaped and extends along the first outer surface, the force receiving portion and the rotation support portion are disposed on the main body portion.

3. The process cartridge of claim 2 wherein, The main body portion, the force receiving portion and the rotation support portion are integrally formed.

4. The process cartridge of claim 3 wherein, The force receiving portion includes a force receiving surface, the force receiving surface receives the separation force from the image forming apparatus.

5. The process cartridge of claim 4 wherein, The force receiving portion further includes a reinforcing portion, the reinforcing portion extends in the first direction and is connected to the force receiving portion and disposed at an angle to the force receiving portion.

6. The process cartridge of claim 4 wherein, The rotation support portion includes a support inclined surface, when the force receiving surface receives the separation force from the image forming apparatus, the support inclined surface abuts against an abutting portion on the drum cartridge, the developing cartridge rotates around the support inclined surface to separate the developing roller from the photosensitive drum.

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