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Developing box

A developing cartridge and developing unit technology, applied in the field of developing cartridges, can solve the problems of unfavorable developing quality, improvement, uneven rotation speed of developing roller, etc., and achieve the effect of improving developing quality and reducing manufacturing cost

Pending Publication Date: 2016-06-15
PRINT RITE UNICORN IMAGE PROD CO LTD OF ZHUHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to realize the decoupling of the output arm 474a and the input arm 71n, the transfer gear 71 is required to slide relative to the developing roller gear 69 in a direction parallel to the rotation axis X, so that the two can only be designed as spur gears, which easily leads to the rotation transmitted to the developing roller The speed is not uniform, which is not conducive to the improvement of the development quality; and in order to be able to slide relative to each other at any time, the processing accuracy and installation requirements are higher; in order to realize the connection after the output arm 474a and the input arm 71n are disconnected, it is necessary for the two The latter requires high manufacturing precision, resulting in an increase in the manufacturing cost of the entire developing cartridge

Method used

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Examples

Experimental program
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Effect test

no. 1 example

[0037] see figure 1 , The developing cartridge is driven by the drive end cover 11, the conductive end cover 12, the photosensitive drum protective cover 13, the torque spring, the drum rotation force receiver 3, the drum unit 4, the developing unit 5 and the development rotation force receiver 2. Switch unit configuration. The drive end cover 11 and the conductive end cover 12 constitute the box body of this embodiment, and the developing rotational force receiver 2 can rotate around the rotation axis X.

[0038] see figure 2 and image 3 , The driving end cover 11 is provided with a supporting shaft hole 111 and a shaft hole 112 , and an inner shaft shoulder 1120 is formed in the supporting shaft hole 111 . The conductive end cover 12 is provided with a support post 121 and a pin hole 122 .

[0039] The photosensitive drum protection cover 13 is detachably fastened on the box body by buckle 130 and the snap-in slots provided on the upper drive end cover 11 and the cond...

no. 2 example

[0060] As an explanation of the second embodiment of the present invention, only the differences from the first embodiment will be described below.

[0061] see Figure 12 In this embodiment, the first magnetic block 7631 and the second magnetic block 7632 are used to replace the spring to form the reset member of this embodiment, and both the first magnetic block 7631 and the second magnetic block 7632 are in a ring structure.

[0062] The necked end portion 7220 of the guide rod 722 passes through the inner holes of the first magnetic block 7631 and the second magnetic block 7632 in sequence, and then fits with the guide hole 7644 in a clearance.

[0063] The first magnetic block 7631 is fixed on the large-diameter end surface of the circular boss structure 720 by bonding, the second magnetic block 7632 is fixed on the bottom surface of the first receiving cavity 7640 by bonding, and the first magnetic block 7631 It is arranged opposite to the second magnetic block 7632 wit...

no. 3 example

[0066] As an explanation of the third embodiment of the present invention, only the differences from the first embodiment will be described below.

[0067] see Figure 13 The outer wall of the guide rod 822 protrudes laterally to form two round rods 8232 to replace the ring body in the first embodiment to form the output arm of this embodiment. The ring body 8641 is formed by protruding in the direction of the ring body 8641. Two notches 8642 matching the round rod 8232 are formed on the ring body 8641 along the direction parallel to the rotation axis X. The ring body 8641 with the notch 8642 replaces the first embodiment. The protrusion at the bottom of the first receiving chamber 8640 constitutes the input arm of this embodiment.

[0068] The upper end surface of the spring 863 abuts against the round rod 8232 instead of the large-diameter end surface of the circular boss structure 820 .

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PUM

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Abstract

The invention relates to a developing box, and belongs to the technical field of electrophotographic imaging and printing. The developing box comprises a box body, a developing unit and a driving switching unit, wherein the driving switching unit comprises a resetting piece, a connection control piece, a developing rotating force receiving piece and a transmission gear for transmitting rotating force to a developing roller. By switching of the matching between all components of the driving switching unit and a developing end cover as well as a driving end cover, the developing rotating force receiving piece is connected with a driving output component of a developing device on a host unit in the developing period and disconnected from the driving output component in the non-developing period, so that a function of switching driving of the developing roller is realized. The driving switching unit in the developing box is simple in structure and convenient for manufacturing and assembling, so that the manufacturing cost of the developing box can be reduced.

Description

technical field [0001] The present invention relates to a developing cartridge detachably mounted on an electrophotographic image forming apparatus. Background technique [0002] Electrophotographic imaging equipment is a kind of equipment that uses the principle of electrophotography to form images on printing media such as paper, including copiers, printers, fax machines, all-in-one machines, etc., usually including a host and a developing cartridge that is detachably installed in the host ; Among them, the developing cartridge has at least a developing roller that provides a developer to the photosensitive drum to develop an electrostatic latent image, and usually also has a photosensitive drum for forming an electrostatic image. [0003] The patent document with publication number CN104541212A discloses an electrophotographic imaging device and a developing cartridge detachably installed on the electrophotographic imaging device. [0004] As shown in accompanying drawin...

Claims

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Application Information

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IPC IPC(8): G03G15/08G03G21/16
CPCG03G15/0813G03G21/1676
Inventor 李争光杨晓锋
Owner PRINT RITE UNICORN IMAGE PROD CO LTD OF ZHUHAI
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