Photosensitive drum device and grounding structure thereof

Abstract

The invention discloses a photosensitive drum device and a grounding structure thereof. The grounding structure of the photosensitive drum device comprises a base and a conductive cloth. The conductive cloth comprises a cloth-shaped base and a conductive metal coated on the cloth-shaped base. The conductive cloth is arranged on the cloth-shaped base. A shaft of a photosensitive drum passes through the conductive cloth and has an electric connection with the conductive cloth. The grounding structure adopts the conductive cloth which is sleeved on the shaft of the photosensitive drum and has an electric connection with the shaft of the photosensitive drum. When the grounding structure rotates with the photosensitive drum, the conductive cloth does not produce large noise like a metal dome because of the conductive cloth is soft. The conductive cloth has a cost lower than a cost of the metal dome. The conductive cloth has low electrode power and thus the energy consumption of the grounding structure is low. Therefore, the grounding structure can produce small noise and has a low cost and energy consumption. The invention also provides the photosensitive drum device adopted the grounding structure.

Description

【Technical field】 [0001] The present invention relates to an electrophotographic device, in particular to a photosensitive drum unit and its grounding structure. 【Background technique】 [0002] The photosensitive drums of electrophotographic devices such as copiers and laser printers are usually driven and supported by rotation, and flanges with gears are embedded in both ends or one end of the photosensitive drums, and are installed on the fixed surface of the image forming device. part. In the electrophotographic process, in order to obtain a good image, the photosensitive layer of the photosensitive drum must be grounded. In the past, the photosensitive layer was grounded from the drum shaft through the frame of a copier or the like. Therefore, good electrical conduction needs to be ensured between the photosensitive layer of the photosensitive drum and the drum shaft. [0003] In a conventional photosensitive drum device in which an insulating flange is provided at the...

AI Technical Summary

Problems solved by technology

[0004] However, in the case of employing the method, the drum shaft and the elastic metal piece form direct metal-to-metal contact, and the elastic metal piece slides and rotates on the outer periphery of the drum shaft while the ground member rotates integrally with the photosensitive drum, thereby There is a problem that noise is generated at the contact part, or wear of the drum shaft becomes noticeable, etc.

Images