Selenium drum for prolonging service life of photosensitive drum

Abstract

The invention provides a selenium drum for prolonging the service life of a photosensitive drum, and relates to the technical field of laser printers. A movable table top is installed in a sliding groove of a plastic part, a pressure spring is installed at the bottom, the movable table top can move up and down in the sliding groove under the action of the pressure spring, and a positioning rod isseparately arranged on both ends of the movable table top; and a cleaning scraper is installed and fixed on the movable table top. When a large-diameter semicircle faces to the positioning rods of themovable table top, since the distances from the center point of a duplicate gear to the tops of the positioning rods are less than the radius of the semicircle, the duplicate gear simultaneously presses the positioning rods on the both sides downward, so that the movable table top moves downward, and the cutting edge of the cleaning scraper is separated from the photosensitive drum; and when thesmall-diameter semicircle is continuously rotated to face to the positioning rods, the movable table top pops upward under the action of the pressure spring, the cutting edge of the cleaning scraperacts on the photosensitive drum again to continue to clean waste powder. The operations are repeated, in a printing process of the selenium drum, the cleaning scraper and the photosensitive drum are not always in contact with each other, so that the attrition rate of the photosensitive drum can be reduced.

Description

technical field [0001] A toner cartridge for prolonging the service life of a photosensitive drum relates to the technical field of laser printers, in particular to a toner cartridge. Background technique [0002] The printing process of laser printers can be divided into six processes: charging, imaging, developing, transfer printing, fixing and cleaning. The cleaning process is to clean the residual toner on the surface of the photosensitive drum with the cleaning blade and collect it into the waste toner bin. Enter a new round of printing process. The main body of the photosensitive drum is an aluminum tube, and the cleaning blade is composed of a metal bracket and a polyurethane rubber strip. The rubber strip has certain elasticity and acts on the photosensitive drum. In the actual use process, it will be found that after the photosensitive drum and the cleaning blade rub against each other for a long time, the photosensitive coating of the photosensitive drum will be o...

AI Technical Summary

Problems solved by technology

In the actual use process, it will be found that after the photosensitive drum and the cleaning blade rub against each other for a long time, the photosensitive coating of the photosensitive drum will be obviously worn, which will affect the imaging and developing effect of the toner drum, resulting in the blackness of the printed document. It is lower than the new powder box. After the blackness is reduced to a certain level, the powder box cannot meet the normal requirements

Images