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Development apparatus

A developing device and a developer technology, which are applied to the equipment of the electric recording process using the charge pattern, the electric recording process using the charge pattern, and the electric recording technique, etc., which can solve the problem of increasing design flexibility and inability to form elastic scrapers, etc. problem, to achieve the effect of reducing the geometric moment of inertia, clear image reproduction, and enlarging assembly tolerances

Inactive Publication Date: 2003-12-31
SHARP KK
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  • Abstract
  • Description
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Problems solved by technology

[0027] However, for a common elastic scraper, the geometric moment of inertia I can only be changed by changing the plate thickness t of the scraper
Therefore, the design flexibility for increasing the above-mentioned abutment load margin is very small, and in addition, considering the change of the passage of time and the change of environmental conditions, it is impossible to select the above-mentioned toning due to the resonance effect of the elastic blade. The basic vibration circular frequency of the elastic blade of the agent layer

Method used

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Embodiment Construction

[0070] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0071] figure 2 To show a schematic sectional view of an electrophotographic developing device using an elastic blade of the present invention, at figure 2 Among them, a negatively charged photosensitive drum 51 having a diameter of 65 mm rotates in the direction of arrow a at a peripheral speed of 190 mm / sec. The conductive base of the photosensitive drum was grounded, and the surface potential of the drum was -550 volts. A developing roller 100 is disposed opposite the photosensitive drum 51, and the developing roller 100 is supported by the casing 1 of the above-mentioned one-component developing device.

[0072] The developing roller 100 is a conductive elastic roller with a diameter of 34 mm. The developing roller is made of a conductive urethane rubber to which a conductive agent (such as carbon black) is added. etc.), its volume resist...

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Abstract

To provide a developing device using an elastic blade suitable for the expanding of the assembling tolerance of the elastic blade for a developing roller, the stabilization of an elastic blade abutting load to secular or environmental change, the improvement of the degree of freedom of specific circular frequency setting and also the miniaturization of the developing device. A rectangular hole 304 is formed in a width direction at an area between the developing roller 100 of the elastic blade 300 and the supporting end part 303 of an abutting part 302. Thus, since the fluctuation gradient of the line pressure (free end abutting load) of the abutting part 302 to the displacement (deflection) of a developer layer regulating member top end is suppressed to be small by reducing the geometrical moment of inertia, so that the assembling tolerance is expanded.

Description

technical field [0001] The present invention relates to a developing device used in machines such as copying machines, printers, facsimile machines, etc., which use electrophotography for image generation. More specifically, the present invention relates to a developing device that uses a flexible flat developer layer regulating member to regulate the developer supplied to the developer support to form a specific amount of electrostatic charge A developer layer of a predetermined thickness; and, the developing device can deliver the developer layer onto an electrostatic latent image, and develop the electrostatic latent image into a visible image. Background technique [0002] Generally, a two-component developing device using a so-called three-component developer composed of a toner and a magnetic carrier is used because a toner concentration adjusting device is required to maintain the toner and the magnetic carrier. The mixing ratio of the carrier is constant, so the dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08
CPCG03G15/0812
Inventor 井上淳志巽洋山中隆幸酒井孝司
Owner SHARP KK
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