Selenium drum of prevention cleaning blade upset

The utility model provides a selenium drum of prevention cleaning blade upset, relates to a laser printer technical field, contains whitewashed storehouse, useless powder storehouse, sensitization drum, the roller that charges, cleaning blade, play powder scraper, magnetism roller and clean doctor -bar. It installs on whitewashed storehouse to go out powder scraper, magnetism roller and carbon dust, sensitization drum, the roller that charges, cleaning blade and clean doctor -bar are installed on useless powder storehouse, and a selenium drum is made up into in useless powder storehouse and powder storehouse, clean doctor -bar shape be the U type, and clean doctor -bar parallel and is the straight line and installs on glue in useless powder storehouse with cleaning blade, and the sensitization drum is tangent with the cleanness doctor -bar with cleaning blade respectively, partial the taking on cleaning blade's blade of cleanness doctor -bar both ends dog -ear for the blade at cleaningblade both ends does not