Developing cartridge

Abstract

The utility model discloses a developing box which comprises a box body, a developing roller, a powder feeding roller and a driving assembly, the driving assembly comprises a power receiving gear, a powder feeding roller gear, a developing roller gear, a first intermediate transmission gear and a second intermediate transmission gear; the power receiving gear is used for receiving external driving force; the powder feeding roller gear is mounted on the powder feeding roller shaft and is meshed with the power receiving gear; the developing roller gear is mounted on the developing roller shaft; and the power receiving gear is meshed with different positions of the first intermediate transmission gear and the second intermediate transmission gear. The developing box disclosed by the utility model has the advantages that the requirement on the strength of the gear of the powder feeding roller is reduced, and the transmission stability is good.

Description

Technical Field

[0001] This utility model relates to a developing box for an electrophotographic imaging device. Background Technology

[0002] The developing cartridge is typically detachably installed in electrophotographic imaging equipment such as laser printers, copiers, and fax machines. The electrophotographic imaging equipment can identify the developing cartridge installed within it. The developing cartridge is equipped with a drive gear that receives external driving force, a developing roller gear that drives the developing roller, and a toner delivery roller gear that drives the toner delivery roller. The drive gear transmits driving force to the toner delivery roller gear, causing the toner delivery roller to rotate. The toner delivery roller gear then transmits driving force to the developing roller gear, causing the developing roller to rotate. In one existing transmission structure, the toner delivery roller gear meshes with the drive gear, and a first intermediate transmission gear meshes with both the toner delivery roller gear and the developing roller gear, thus completing the transmission of driving force. However, this structure places high strength requirements on the toner delivery roller gear and suffers from poor transmission smoothness. Utility Model Content

[0003] This invention provides a developing cartridge that reduces the strength requirements of the powder feeding roller gears and provides good transmission smoothness.

[0004] A developing cartridge, comprising:

[0005] The container is used to hold the developer and has a first end and a second end that are arranged opposite to each other in a first direction, a third end and a fourth end that are arranged opposite to each other in a second direction, and a fifth end and a sixth end that are arranged opposite to each other in a third direction.

[0006] A developing roller, located at the fifth end, includes a developing roller shaft;

[0007] The powder feeding roller, which is in contact with the developing roller, includes the powder feeding roller shaft;

[0008] The drive assembly, located at the first end, includes a power receiving gear that receives external driving force, a powder feeding roller gear that is mounted on the powder feeding roller shaft and meshes with the power receiving gear, a developing roller gear that is mounted on the developing roller shaft, and a first intermediate transmission gear that meshes with the developing roller gear.

[0009] The drive assembly further includes a second intermediate drive gear that meshes with the first intermediate drive gear, and the power receiving gear meshes with both the powder feeding roller gear and the second intermediate drive gear.

[0010] In one embodiment, the first intermediate drive gear rotates about a first rotation axis extending in a first direction, and the second intermediate drive gear rotates about a second rotation axis extending in the first direction.

[0011] In one embodiment, in the second direction, the powder feeding roller shaft is close to the fourth end of the cartridge body, and the developing roller shaft, the first rotating shaft, and the second rotating shaft are close to the third end of the cartridge body.

[0012] In one embodiment, the second rotation axis is closer to the third end of the housing than the first rotation axis.

[0013] In one embodiment, the outer diameters of the first intermediate drive gear and the second intermediate drive gear are smaller than the outer diameters of any one of the power receiving gear, the developing roller gear, and the powder feeding roller gear.

[0014] In one embodiment, the second intermediate drive gear is rotatably mounted on the powder feeding roller shaft.

[0015] In one embodiment, the first intermediate transmission gear rotates about a first rotation axis extending in a first direction.

[0016] In one embodiment, the outer diameter of the second intermediate transmission gear is the same as the outer diameter of the powder feeding roller gear and is larger than the outer diameter of the first intermediate transmission gear.

[0017] In one embodiment, in the second direction, the powder feeding roller shaft is close to the fourth end of the cartridge body, and the developing roller shaft and the first rotating shaft are close to the third end of the cartridge body.

[0018] In one embodiment, the developing cartridge further includes a first support, the first rotating shaft is fixed to the first support, and the first ends of the developing roller shaft and the powder feeding roller shaft pass through the first support and are supported by the first support. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the developing cartridge according to Embodiment 1 of this utility model;

[0020] Figure 2 for Figure 1 The left view;

[0021] Figure 3 This is a three-dimensional schematic diagram of the developing cartridge according to Embodiment 2 of this utility model;

[0022] Figure 4 for Figure 3 Partially exploded diagram;

[0023] Figure 5 for Figure 3 The left view.

[0024] Explanation of reference numerals in the attached drawings: 10, housing; 11, first end; 12, second end; 13, third end; 14, fourth end; 15, fifth end; 16, sixth end; 17, first rotating shaft; 18, second rotating shaft; 20, developing roller; 21, developing roller body; 22, developing roller shaft; 31, powder feeding roller shaft; 40, drive assembly; 41, power receiving gear; 411, power receiving unit; 412, gear unit; 42, developing roller gear; 43, powder feeding roller gear; 44, first intermediate transmission gear; 45, second intermediate transmission gear; 50, first support. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] In the following description, the direction in which the developing roller extends is referred to as the "first direction." The direction in which the developing cartridge is installed in the electrophotographic imaging device 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.

[0029] Example 1

[0030] refer to Figures 1-2 In one embodiment of the present invention, the developing cartridge includes: a cartridge body 10, a developing roller 20, a powder feeding roller, and a driving assembly 40.

[0031] The housing 10 has a developer-containing cavity. The housing 10 has a first end 11 and a second end 12 oppositely arranged in a first direction; a third end 13 and a fourth end 14 oppositely arranged in a second direction; and a fifth end 15 and a sixth end 16 oppositely arranged in a third direction. The first, second, and third directions intersect each other; specifically, they are orthogonal. In this embodiment, for ease of description, the first direction is defined as the left-right direction, the second direction as the front-back direction, and the third direction as the up-down direction. The first end 11 is the left end of the housing 10, the second end 12 is the right end of the housing 10, the third end 13 is the front end of the housing 10, the fourth end 14 is the rear end of the housing 10, the fifth end 15 is the upper end of the housing 10, and the sixth end 16 is the lower end of the housing 10. The housing 10 has a first end 11 and a second end 12.

[0032] The developing roller 20 rotates about a second rotation axis extending along a first direction. The developing roller 20 is located at one end of the housing 10 in the second direction. The developing roller 20 includes a developing roller body 21 and a developing roller shaft 22. The developing roller body 21 is made of a material such as elastic rubber. The developing roller shaft 22 is a solid cylindrical metal component.

[0033] The powder feeding roller rotates about a third rotation axis extending along a first direction. The powder feeding roller is located between the receiving cavity and the developing roller 20. The powder feeding roller includes a powder feeding roller body and a powder feeding roller shaft 31. The powder feeding roller body is a hollow cylindrical component extending along the first direction. The powder feeding roller shaft 31 is made of metal or conductive resin. The first end of the powder feeding roller shaft 31 is supported by the first end 11 of the housing 10.

[0034] The drive assembly 40 includes: a power receiving gear 41, a developing roller gear 42, a powder feeding roller gear 43, a first intermediate drive gear 44, and a second intermediate drive gear 45. The power receiving gear 41 rotates about a first axis extending in a first direction and includes a power receiving part 411 and a gear part 412, with the gear part 412 coaxially arranged with the power receiving part 411. The developing roller gear 42 is mounted on the first end of the developing roller shaft 22 to drive the developing roller 20 to rotate, and the first intermediate drive gear 44 meshes with the developing roller gear 42. The powder feeding roller gear 43 is mounted on the first end of the powder feeding roller shaft 31 to drive the powder feeding roller to rotate, and the powder feeding roller gear 43 meshes with the gear part 412 of the power receiving gear 41. The second intermediate drive gear 45 meshes with both the gear part 412 of the power receiving gear 41 and the first intermediate drive gear 44. The power receiving gear 41 receives the driving force from the electrophotographic imaging equipment through the power receiving unit 411 and rotates, driving the powder feeding roller gear 43 and the second intermediate transmission gear 45 to rotate. The second intermediate transmission gear 45 drives the first intermediate transmission gear 44 to rotate, and the rotation of the first intermediate transmission gear 44 drives the developing roller gear 42 to rotate, thereby driving the developing roller 20 and the powder feeding roller 30 to rotate.

[0035] In this embodiment, the first intermediate transmission gear 44 rotates about a fourth axis extending along a first direction, and the second intermediate transmission gear rotates about a fifth axis extending along a first direction. Specifically, the first end 11 of the housing 10 is provided with a first rotating shaft 17 rotating about the fourth axis and a second rotating shaft 18 rotating about the fifth axis. The first intermediate transmission gear 44 is mounted on the first rotating shaft 17, and the second intermediate transmission gear 45 is mounted on the second rotating shaft 18.

[0036] In this embodiment, in the second direction, the powder feeding roller shaft 31 is closer to the fourth end 14 of the cartridge 10 than the third end 13, and the meshing portion of the powder feeding roller gear 43 and the gear portion 412 of the power receiving gear is closer to the fourth end 14 than the third end 13 of the cartridge 10. The developing roller shaft 22, the first rotating shaft 17, and the second rotating shaft 18 are closer to the third end 13 than the fourth end 14 of the cartridge 10, and the meshing portion of the second intermediate transmission gear 45 and the gear portion 412 of the power receiving gear is closer to the third end 13 than the fourth end 14 of the cartridge 10.

[0037] In this embodiment, the second rotation axis 18 is closer to the third end 13 than the first rotation axis 17.

[0038] In this embodiment, the outer diameters of the first intermediate transmission gear 44 and the second intermediate transmission gear 45 are smaller than the outer diameters of any one of the power receiving gear 41, the developing roller gear 42, and the powder feeding roller gear 43.

[0039] In this embodiment, the developing roller gear 42 and the developing roller shaft 22, and the powder feeding roller gear 43 and the powder feeding roller shaft 31 are connected by a D-shaped structure.

[0040] The developing cartridge also includes a first support 50, and a first rotating shaft 17 and a second rotating shaft 18 are fixed on the first support 50. The first ends of the developing roller shaft 22 and the powder feeding roller shaft 31 pass through the first support 50 and are supported by the first support 50.

[0041] Example 2

[0042] The difference between this embodiment and Embodiment 1 is that the location of the second intermediate transmission gear is different.

[0043] like Figure 3-5 As shown, in this example, the second intermediate transmission gear 45 is coaxially arranged with the powder feeding roller gear 43, that is, the second intermediate transmission gear 45 is rotatably mounted on the powder feeding roller shaft 31.

[0044] In this embodiment, the gear assembly meshing relationship is as follows: the powder feeding roller gear 43 and the second intermediate transmission gear 45 mesh with the gear portion 412 of the power receiving gear 41; the first intermediate transmission gear 44 meshes with the second intermediate transmission gear 45; and the first intermediate transmission gear 44 meshes with the developing roller gear 42. The power receiving gear 41 receives the driving force from the electrophotographic imaging equipment through the power receiving portion 411 and rotates, driving the powder feeding roller gear 43 and the second intermediate transmission gear 45 meshed with it to rotate. The powder feeding roller gear 43 drives the powder feeding roller to rotate. The second intermediate transmission gear 45 transmits the driving force to the first intermediate transmission gear 44, and the first intermediate transmission gear 44 then transmits the driving force to the developing roller gear 42, which drives the developing roller 20 to rotate.

[0045] In this embodiment, the outer diameter of the second intermediate transmission gear 45 is the same as the outer diameter of the powder feeding roller gear 43.

[0046] In this embodiment, the outer diameter of the second intermediate transmission gear 45 is larger than the outer diameter of the first intermediate transmission gear 44.

[0047] By setting a second intermediate transmission gear, this utility model can reduce the strength requirements of the powder feeding roller gear 43 on the one hand, and enhance the transmission smoothness of the transmission component on the other hand.

[0048] 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 comprising: a cartridge body for accommodating a developer, having a first end and a second end disposed opposite to each other in a first direction, having a third end and a fourth end disposed opposite to each other in a second direction, and having a fifth end and a sixth end disposed opposite to each other in a third direction; a developing roller located at the fifth end, including a developing roller shaft; a powder feeding roller in contact with the developing roller, including a powder feeding roller shaft; a drive assembly located at the first end, including a power receiving gear receiving an external driving force, a powder feeding roller gear installed on the powder feeding roller shaft and engaged with the power receiving gear, a developing roller gear installed on the developing roller shaft, and a first intermediate transmission gear engaged with the developing roller gear; characterized in that the drive assembly further includes a second intermediate transmission gear engaged with the first intermediate transmission gear, and the power receiving gear is engaged with both the powder feeding roller gear and the second intermediate transmission gear.

2. The process cartridge according to claim 1, wherein, The first intermediate transmission gear rotates around a first rotation axis extending in the first direction, and the second intermediate transmission gear rotates around a second rotation axis extending in the first direction.

3. The process cartridge of claim 2 wherein, In the second direction, the powder feeding roller shaft is close to the fourth end of the cartridge body, and the developing roller shaft, the first rotation axis, and the second rotation axis are close to the third end of the cartridge body.

4. The process cartridge of claim 3 wherein, The second rotation axis is closer to the third end of the cartridge body than the first rotation axis.

5. The process cartridge of claim 4 wherein, The outer diameter of the first intermediate transmission gear and the second intermediate transmission gear is smaller than the outer diameter of any one of the power receiving gear, the developing roller gear, and the powder feeding roller gear.

6. The process cartridge of claim 1, wherein, The second intermediate transmission gear is rotatably installed on the powder feeding roller shaft.

7. The process cartridge of claim 6 wherein, The first intermediate transmission gear rotates around a first rotation axis extending in the first direction.

8. The process cartridge of claim 6 wherein, The outer diameter of the second intermediate transmission gear is the same as the outer diameter of the powder feeding roller gear and greater than the outer diameter of the first intermediate transmission gear.

9. The process cartridge of claim 6 wherein, In the second direction, the powder feeding roller shaft is close to the fourth end of the cartridge body, and the developing roller shaft and the first rotation axis are close to the third end of the cartridge body.

10. The process cartridge according to any one of claims 2-5, wherein The developing cartridge further includes a first support, the first rotation axis is fixed on the first support, and the first ends of the developing roller shaft and the powder feeding roller shaft pass through the first support and are supported by the first support.

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