JPS6440855U

JPS6440855U -

Info

Publication number: JPS6440855U
Application number: JP13566487U
Authority: JP
Priority date: 1987-09-04
Filing date: 1987-09-04
Publication date: 1989-03-10
Anticipated expiration: 2002-09-04
Also published as: JPH073410Y2

Description

[Brief explanation of the drawing]

第１図は本考案の第一実施例を示す複写機の現
像装置の要部拡大縦断正面図、第２図は同じく全
体縦断正面図、第３図は同じく横断平面図、第４
図は同じく現像ローラーの単体正面図、第５図は
同じく現像ローラーに付着する現像剤の量が多い
場合の使用状態正面図、第６図は同じく現像ロー
ラーに付着する現像剤の量が少ない場合の使用状
態正面図、第７図は本考案の第二実施例を示す複
写機の現像装置の現像ローラーの単体正面図、第
８図は本考案の第三実施例を示す複写機の現像装
置の正面図、第９図は従来例を示す複写機の現像
装置の全体縦断正面図、第１０図は同じく横断平
面図、第１１図は同じく現像ローラーの単体正面
図、第１２図は同じく現像ローラーの単体縦断正
面図である。１：現像槽、２：現像剤、２０：支軸、２１：
マグネツト体、２２：現像ローラー、２３：感光
体、２４：現像剤穂立ち形成板、２４ａ：掻取端
、２４ｂ：流し端、Ａ：現像装置、２４ｃ：穂立
ち形成部、２５：支持杆、Ｂ：マグネツト体の回
転方向（時計方向）、Ｆ：分離手段、ｆａ：分離
補助磁性片、ｆｂ：現像剤分離片、Ｎ，Ｓ：マグ
ネツト。 FIG. 1 is an enlarged vertical sectional front view of main parts of a developing device of a copying machine showing a first embodiment of the present invention, FIG. 2 is an overall longitudinal sectional front view, FIG.
The figure is a front view of the developing roller alone, Figure 5 is a front view of the state in use when there is a large amount of developer attached to the developing roller, and Figure 6 is a front view of the developing roller when the amount of developer attached is small. 7 is a front view of a developing roller of a developing device of a copying machine showing a second embodiment of the present invention, and FIG. 8 is a front view of a developing device of a copying machine showing a third embodiment of the present invention. , FIG. 9 is an overall vertical sectional front view of a developing device of a copying machine showing a conventional example, FIG. 10 is a cross-sectional plan view, FIG. 11 is a front view of the developing roller, and FIG. FIG. 3 is a longitudinal sectional front view of the roller. 1: developer tank, 2: developer, 20: spindle, 21:
Magnetic body, 22: developing roller, 23: photoreceptor, 24: developer spike formation plate, 24a: scraped end, 24b: flow end, A: developing device, 24c: spike forming section, 25: support rod, B: rotation direction of the magnetic body (clockwise), F: separation means, fa: separation auxiliary magnetic piece, fb: developer separation piece, N, S: magnet.

Claims

[Scope of utility model registration request]

The developing tank is provided with a developing roller, and the developing roller is composed of a support shaft rotatably supported by the developer tank, and a magnet body fixed to the support shaft and having a plurality of magnets on the outer peripheral surface, A means for rotating a support shaft is provided, an arcuate developer spike formation plate is disposed between the developing roller and the photoreceptor, and a separating means is provided for separating the developed developer from the magnet body. , the separation means includes a separation auxiliary magnetic piece disposed in the direction of rotation of the magnet body relative to the spike forming plate and for concentrating the magnetic field of the magnet, and a separation auxiliary magnetic piece that is in contact with the magnet body in proximity to the separation auxiliary magnetic piece. 1. A developing device for a copying machine, comprising a developer separating piece.