A printer drum mechanical structure with self-cleaning function

By linking the rotating cleaning scraper with the gear transmission system, the problems of localized scraper wear and waste toner clogging in traditional toner cartridge cleaning structures are solved, achieving integrated high-efficiency cleaning and waste toner recycling, thus improving print quality and equipment reliability.

CN120255298BActive Publication Date: 2026-05-26ZHONGSHAN FITWELL IMAGE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHONGSHAN FITWELL IMAGE CO LTD
Filing Date
2025-05-14
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In traditional toner cartridge cleaning structures, the blade of the fixed scraper is in constant contact with the same position on the photosensitive drum, leading to increased local wear, uneven cleaning gaps, toner residue, or scratches on the photosensitive drum. The waste toner recovery path is singular and prone to clogging, and the independent drive of the cleaning components and waste toner recovery mechanism results in high system energy consumption and high maintenance costs.

Method used

The system employs a rotating cleaning scraper assembly linked to a gear transmission system, combined with a waste powder recycling bin linkage mechanism. Through the rotation of the elastic cleaning scraper and the oscillation of the swingable powder guide plate, a dynamic cleaning and optimized waste powder recycling path is formed. The cleaning and recycling mechanisms are driven by the same power source, achieving integrated cleaning and flow guidance.

Benefits of technology

It improves cleaning uniformity, extends blade life, reduces the risk of waste powder clogging, simplifies the drive structure, reduces energy consumption and maintenance costs, and improves print quality and equipment life.

✦ Generated by Eureka AI based on patent content.

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Abstract

This application relates to the field of printing equipment manufacturing technology, and discloses a mechanical structure for a printer drum with a self-cleaning function. The structure includes: a drum housing, including a photosensitive drum disposed within the drum housing; a rotatable cleaning scraper assembly, including an elastic cleaning scraper and a rotary drive unit, wherein the cutting edge of the elastic cleaning scraper forms an elastically fitted cleaning gap with the surface of the photosensitive drum; a gear transmission system, including a driving gear connected to the printer's main drive shaft and a driven gear fixedly connected to the rotary drive unit; and a waste toner collection bin linkage mechanism, including a lever assembly linked to the rotary drive unit and a swingable toner guide plate disposed at the inlet of the waste toner collection bin. When the lever assembly rotates with the rotary drive unit, it drives the swingable toner guide plate to periodically change the waste toner collection path. The inner wall of the waste toner collection bin is provided with a spiral toner guide groove, the lower end of which corresponds to the position below the cleaning gap, for guiding the scraped waste toner along an optimized path into the waste toner storage area.
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