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Developing device

A developing device and developer technology, which are used in electrographic, optical, and physical variable measurement of liquid level indicators, etc., can solve the problems of residual toner detection errors, inability to fully ensure detection accuracy, etc., and achieve good image quality. Effect

Inactive Publication Date: 2006-01-18
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when there is an extreme difference in the toner level between the center portion and both ends of the toner container 900, there is a possibility that a detection error of the remaining toner amount may occur, so that the detection accuracy cannot be sufficiently ensured.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] General description of the image forming apparatus

[0067] figure 1 It is a schematic cross-sectional view showing the configuration of a digital color copying machine (hereinafter simply referred to as a copying machine) 100 as a color image forming apparatus according to the first embodiment.

[0068] The copier 100 forms a multi-color and single-color image on a predetermined paper (recording paper) corresponding to image data transmitted from the outside, and is composed of an exposure unit 1, a developing device 2, a photosensitive drum 3, a charger 5, and a cleaning unit 4. , The transfer conveyor belt unit 8, the fixing unit 12, the paper conveying path S, the paper feed tray 10, and the paper discharge trays 15, 33 and so on.

[0069] In addition, the image data processed in the copying machine 100 corresponds to color images using each color of black (K), cyan (C), magenta (M), and yellow (Y). Therefore, exposure unit 1 (1a, 1b, 1c, 1d), developing device 2 (2a,...

Embodiment 2

[0111] Next, with reference to the drawings, a developing device in a different mode from that of Embodiment 1 described above will be described. In addition, the developing device according to the second embodiment is different from the developing device 2 in the above-mentioned first embodiment only in the developer detecting mechanism, and the other configurations are the same. Therefore, in the second embodiment, the same reference numerals are given to the same structure of the developer detection mechanism section, and the description thereof is omitted. In addition, effects different from those of the first embodiment will be described, and descriptions of the same effects and modifications will be omitted.

[0112] Picture 9 and Picture 10 It is an explanatory diagram showing the configuration of the developer detection mechanism section of the developing device 2 according to Embodiment 2 of the present invention.

[0113] In addition to the agitating and conveying rol...

Embodiment 3

[0115] Next, with reference to the drawings, a developing device of a mode different from that of Embodiment 1 described above will be described. In addition, the developing device according to the third embodiment is different from the developing device 2 in the above-mentioned first embodiment only in the developer detecting mechanism, and the other configurations are the same. Therefore, in the third embodiment, the same structure of the developer detecting mechanism portion is assigned the same reference numeral, and the description thereof is omitted. In addition, effects different from those of the first embodiment will be described, and descriptions of the same effects and modifications will be omitted.

[0116] Picture 11 and Picture 12 It is an explanatory diagram showing the configuration of the developer detection mechanism section of the developing device 2 according to Embodiment 3 of the present invention.

[0117] The developer detection mechanism is a stainless ...

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PUM

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Abstract

The developing device has: an agitating and conveying part, which distributes weight eccentrically with respect to the rotation center, and agitates and conveys the developer; a clutchable drive transmission part, which drives the agitating and conveying part to rotate; and a rotation detector, which detects the rotation state of the agitating and conveying part , detect the remaining amount of developer according to the rotation state; or, the developing device has the above-mentioned agitating and conveying member and the drive transmission member, the eccentric weight distribution is performed by a rod-shaped weight member fixedly arranged eccentrically with respect to the rotating shaft, and the agitating and conveying member has an inner diameter ratio a first coil spring having a large outer diameter of the weight member, which is rotatably inserted into the weight member in a state where its rotation angle is restricted to a predetermined angle; The conveyance member is arranged near the developer supply roller, and an equalizing member for averaging the developer is arranged in a space between the developer supply roller and the stirring conveyance member.

Description

[0001] This application request is based on Japanese Patent Application No. 2004-207459 filed in Japan on July 14, 2004, Japanese Patent Application No. 2004-244136 filed in Japan on August 4, 2004, and Japanese Patent Application filed in Japan on September 29, 2004 Priority of 2004-284795 and Japanese Patent Application No. 2004-309846 filed in Japan on October 25, 2004. Therefore, all the contents of the above application are combined in this application. Technical field [0002] The present invention relates to a developing device having a function of detecting the remaining amount of developer remaining in a developing tank. Background technique [0003] When the developer stored in the developing tank is used up, the developing device needs to be replaced with a new one. Therefore, the developing device is provided with a developer detecting mechanism for detecting the remaining amount of the developer stored in the developing tank. [0004] As a technique related to this de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/06G01F23/22
Inventor 竹泽洋一林重贵木户荣一西野俊夫
Owner SHARP KK