Developing apparatus

Abstract

The invention discloses a development device. The line contact pressure between a powder feeding roller and a development roller is between 0.5 and 2g / mm; the cell density of the powder feeding roller surface is less than or equal to 10cells / mm; and the powder feeding roller and the development roller meet the following relational expression: df(V1+V2) / V1 is less than 10, wherein d represents the cell density of the powder feeding roller surface, f represents the line contact pressure between the powder feeding roller and the development roller, V1 represents the rotational line velocity when the development roller works, and V2 represents the rotational line velocity when the powder feeding roller works. The development device can reduce the torque between the powder feeding roller and the development roller to below 0.6Kgf.cm, can reduce the friction loss of the powder feeding roller and the development roller, and can prolong the service life of the development device. In addition, the development device can reduce the driving torque needed by the development device, alleviate the driving load pressure of an imaging device, and prolong the service life of the imaging device.

Description

technical field [0001] The invention relates to a developing device used in laser imaging equipment. Background technique [0002] In laser imaging equipment, such as laser printers, laser copiers, or facsimile machines, a developing device for developing an electrostatic latent image formed on a photosensitive drum is provided. The current developing device generally includes: a box body for accommodating the developer, in which a stirring frame is arranged; a developing roller and a powder feeding roller rotatably supported on the box body; a device for controlling the thickness of the developer layer on the developing roller The powder outlet knife includes a knife holder and a blade fixed on the knife holder, and the blade has a free end elastically contacting with the developing roller. Among them, the developing roller is composed of a steel shaft and a rubber layer surrounding the steel shaft, and the rubber layer can produce certain elastic deformation; the powder f...

AI Technical Summary

Problems solved by technology

If the material selection of the powder feeding roller, developing roller and powder outlet knife is not suitable or the process size exceeds a certain error range, the compression of the rubber layer on the developing roller may exceed the predetermined compression, so that the developing roller and the powder feeding roller and The friction between the powder knives will increase significantly, especially the sliding friction between the powder knives and the developing roller will increase sharply, the wear of the developing roller will be more serious, and the input torque of the developing device will also increase, which will easily cause The deformation of transmission parts such as gears makes the developing device not work normally, and even affects the service life of laser imaging equipment such as printers

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