| 摘要 |
<p>PURPOSE:To prevent single-component toner from sticking on the surface of the lens of an exposure part by providing a thin plate type permanent magnet on the surface of a frame body nearby the lens. CONSTITUTION:The exposure part 14 has a group light emitting diode (LED) 14b where fine light emitting diodes are arrayed in matrix, a lens 14a which projects the light from this LED upon the surface of the photosensitive drum 2, and the frame body 14c which contains the LED 14b and holds the lens 14. Then thin plate type magnetic (permanent magnet) 14d are provided at both side parts of the lens 14a on the surface of the frame body 14c. Consequently, the single-component toner scattered to the periphery of the lens 14a of the exposure part 14 is attracted to the magnets 14d and prevents from sticking on the surface of the lens 14a.</p> |
