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Developing cartridge with driving force receiving member

A technology of receiving member and developing cartridge, applied in the field of developing cartridge, can solve the problems of increasing the size of the driving force to receive the developing gear, increasing the manufacturing cost of the developing cartridge, etc.

Active Publication Date: 2019-11-26
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the size of the drive receiving development gear will require a larger amount of resin material to mold the gear
This will lead to an increase in the manufacturing cost of the developing cartridge

Method used

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  • Developing cartridge with driving force receiving member
  • Developing cartridge with driving force receiving member
  • Developing cartridge with driving force receiving member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] A developing cartridge according to an embodiment of the present invention will be described below with reference to the accompanying drawings, in which similar parts or members are denoted by the same reference numerals to avoid duplication of description.

[0035] 1. The overall structure of the developer box

[0036] like figure 1 As shown, the developing cartridge 1 includes: a developing roller 2; a supply roller 3; a thickness regulating sheet 4; and a toner accommodating portion 5 as an example of the inside of a housing.

[0037] In the following description, the directions are based on the state when the developing cartridge 1 is placed in the horizontal direction. therefore, figure 1 The upper side in is the upper side of the developer cartridge 1, figure 1 The lower side in is the lower side of the developer cartridge 1 . figure 1 The right side in is the front side of the developer cartridge 1, figure 1 The left side in is the rear side of the developer...

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PUM

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Abstract

A developing cartridge includes: a casing containing a developer and having a supporting portion; a developing roller; a driving force receiving member receiving a driving force from outside the developing cartridge, supported by the supporting portion, and rotating around a rotation axis relative to the supporting portion. The driving force receiving member includes: a first cylindrical portion having a gear portion for transmitting the driving force to the developing roller; a second cylindrical portion located radially inside the first cylindrical portion, between the first cylindrical portion and the second There is a gap between the cylindrical parts, and the second cylindrical part is in contact with the support part; the receiving part receives the driving force from the outside of the developing cartridge. The receiving portion is located outside the first cylindrical portion and the second cylindrical portion in an axial direction in which the rotation axis extends. The receiving portion has an inner space communicating with a gap between the first cylindrical portion and the second cylindrical portion. When the receiving portion is viewed in the axial direction, the receiving portion is located at a position such that the receiving portion overlaps the gap between the first cylindrical portion and the second cylindrical portion. The receiving portion has an axially outer end at least partially closed.

Description

technical field [0001] The present invention relates to a developing cartridge mountable in an electrophotographic type image forming apparatus. Background technique [0002] One example of a developing cartridge mountable in an electrophotographic image forming apparatus has a developing roller for carrying toner. The developing cartridge is first installed in a drum cartridge with a photosensitive drum before being installed in an image forming apparatus. [0003] Japanese Patent Laid-Open No. 2011-39561 proposes a developing cartridge provided with a driving force receiving developing gear. The driving force receiving developing gear receives input driving force for driving the developing roller and the like. [0004] In the developing cartridge proposed in the above-mentioned patent documents, two contact receiving portions having a substantially L-shaped cross section are provided on the outer end surface of the driving force receiving developing gear. Therefore, whe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08
CPCG03G15/0806G03G21/1647G03G21/1676G03G2221/1657G03G15/0865
Inventor 野田龙司清水贵司清水圭太
Owner BROTHER KOGYO KK