Patent ID: 8965253
Filing Date: 2015-02-24
Classification: G03G

Abstract:
1. A developing device comprising: a developing roller that is disposed to oppose an image carrier on which an electrostatic latent image is formed and supplies a developer to the image carrier at a region that opposes the image carrier; a toner supplying roller that is disposed to oppose the developing roller and supplies a toner to the developing roller at a region that opposes the developing roller; a regulation blade that is disposed to oppose the toner supplying roller over a predetermined gap; a casing that houses the developing roller, the toner supplying roller and the regulation blade and includes an inner wall portion which opposes the developing roller between the regulation blade and the image carrier; a film member that is formed of a flexible material, disposed away from an upper surface of the inner wall portion by a predetermined gap and vibratile in a direction to approach or leave the inner wall portion; a bias member that is connected to at least one end in a longitudinal direction of the film member and gives tension to the film member; and a protrusion that is disposed on a gear composing a group of drive gears of the developing roller or the toner supplying roller and intermittently contacts an end edge of the film member because of rotation of the gear to vibrate the film member.