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Developing device and image forming apparatus therewith, and developer carrying member therein

A developing device and developer technology, applied to the electric recording technology using the charge pattern, the equipment of the electric recording process using the charge pattern, and the electric recording technique, etc., can solve the problems of high price, achieve low cost, enhance magnetic force, The effect of suppressing bending

Active Publication Date: 2016-08-31
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, plastic magnets are expensive compared to rubber magnets

Method used

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  • Developing device and image forming apparatus therewith, and developer carrying member therein
  • Developing device and image forming apparatus therewith, and developer carrying member therein
  • Developing device and image forming apparatus therewith, and developer carrying member therein

Examples

Experimental program
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Effect test

Embodiment 1

[0059] The relationship between the arrangement of plastic magnets and rubber magnets used as the magnetic poles of the fixed magnet 27 and the amount of deformation of the rotating shaft 27 e was investigated. As a test method, the developing device 4 of the first embodiment, the developing device 4 of the second embodiment, and the developing device 4 of the comparative example were produced. The developing device 4 of the first embodiment (invention 1) was as follows: Figure 4 As shown, the S1 poles 27a and S2 poles 27c using plastic magnets of the same shape and the N1 poles 27b and N2 poles 27d using rubber magnets of the same shape are respectively arranged axisymmetrically with respect to the rotation axis 27e. Device 4 (the present invention two) such as Figure 6 As shown in FIG. Figure 9 As shown, only the S2 pole 27c uses a plastic magnet, and the S1 pole 27a, N1 pole 27b, and N2 pole 27d use rubber magnets.

[0060] In the present invention one, the magnet heig...

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Abstract

A developing device includes a housing, a developer carrying member, and a magnet member. The housing contains magnetic developer. The developer carrying member is rotatably supported on the housing and carries the developer on its circumferential surface. The magnetic member has a shaft fixed inside the developer carrying member and a plurality of developer carrying member-side magnetic poles fixed to the shaft in its circumferential direction. An even number of the developer carrying member-side magnetic poles are formed by plastic magnets, one or more other of the developer carrying member-side magnetic poles are formed by rubber magnets, and one or more pairs of the plastic magnets located opposite each other across the shaft have the same shape and are fixed in axial symmetry with respect to the shaft.

Description

technical field [0001] The present invention relates to image forming apparatuses such as copiers, printers, and facsimiles, developing devices used therein, and developer carriers, and more particularly to a method for suppressing deformation of fixed magnets arranged in the developer carriers. Background technique [0002] Conventionally, as a developing method of an image forming apparatus using an electrophotographic method, a powder developer is mainly used, and the usual process is to visualize an electrostatic latent image formed on an image carrier such as a photosensitive drum with the developer, and then visualize the visible image ( After the toner image) is transferred to the recording medium, a fixing process is performed. [0003] Developers are roughly divided into two-component developers consisting of toner and magnetic carriers and one-component developers consisting only of non-magnetic or magnetic toners. As a development method using two-component develo...

Claims

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Application Information

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IPC IPC(8): G03G15/09
CPCG03G15/0928G03G15/0812G03G15/0914G03G15/0942G03G15/0921
Inventor 丹村荣司
Owner KYOCERA DOCUMENT SOLUTIONS INC
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