JPH0185852U

JPH0185852U -

Info

Publication number: JPH0185852U
Application number: JP18281887U
Authority: JP
Priority date: 1987-11-30
Filing date: 1987-11-30
Publication date: 1989-06-07
Anticipated expiration: 2002-11-30
Also published as: JPH073411Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例による現像装置の断
面構成図、第２図はその要部を示す斜視図、第３
図ａ及びｂはともにブロツキング部材の作用を示
す断面図、第４図ａ，ｂ，ｃはそれぞれ本考案の
他の実施例を説明するためのセンサ出力波形図で
ある。２……現像剤容器、４……現像ローラ、７……
ドクターブレード（規制部材）、８……壁面、９
……トナー濃度センサ、１０……仕切り板、１１
……対向壁、１２……流通路、１３……ブロツキ
ング防止部材、１３ａ……支持板、１３ｂ……ブ
ロツキング防止片、１３ｃ……棒状部材、１５…
…ばね、２４……中間歯車、２５……円筒部材。 FIG. 1 is a cross-sectional configuration diagram of a developing device according to an embodiment of the present invention, FIG. 2 is a perspective view showing the main parts thereof, and FIG.
4A and 4B are cross-sectional views showing the action of the blocking member, and FIGS. 4A, 4B, and 4C are sensor output waveform diagrams for explaining other embodiments of the present invention, respectively. 2...Developer container, 4...Developing roller, 7...
Doctor blade (regulating member), 8...Wall surface, 9
... Toner concentration sensor, 10 ... Partition plate, 11
... Opposing wall, 12 ... Flow path, 13 ... Blocking prevention member, 13a ... Support plate, 13b ... Blocking prevention piece, 13c ... Rod-shaped member, 15 ...
... Spring, 24 ... Intermediate gear, 25 ... Cylindrical member.

Claims

[Scope of Claim for Utility Model Registration] (1) A developing roller to which a magnetic brush is formed by adhering developer to its outer peripheral surface, a regulating member for regulating the height of the magnetic brush of this developing roller, and stirring the developer. In the developing device for supplying developer toner to an image forming section, the developer scraped off by the regulating member is disposed near the regulating member by the stirring roller. A flow path for returning the developer to the top is formed with a predetermined flow path volume, and a toner concentration sensor for detecting the toner concentration of the developer is provided outside the wall surface forming the flow path, and a toner concentration sensor is provided outside the wall surface forming the flow path. A developing device characterized in that a blocking prevention member for preventing toner blocking is swingably provided at least in a portion facing the sensor. (2) The flow path is formed opposite to the wall surface on a wall continuous with the regulating member and a part of a partition plate that guides the developer scraped by the regulating member onto the stirring roller. 2. The developing device according to claim 1, wherein the developing device is comprised of a facing wall having an inner wall, and the blocking prevention member is disposed on the facing wall. (3) The blocking prevention member includes a support plate formed long along the axial direction of the developing roller;
The flow path is composed of a plurality of anti-blocking pieces provided on the support plate, and the flow path is composed of a wall surface continuous with the regulating member and a support plate forming the anti-blocking member. A developing device according to claim 1 of the utility model registration claim. (4) The blocking prevention member includes a support plate formed long along the axial direction of the developing roller;
It consists of a plurality of anti-blocking pieces provided on the support plate, the anti-blocking pieces are arranged to be inclined at a predetermined angle with respect to the direction perpendicular to the axis of the developing roller, and the oblique anti-blocking piece A developing device according to any one of claims 1 to 3, characterized in that the piece prevents blocking and agitates the developer.