| 摘要 |
PURPOSE:To obtain a light deflection scanning device which radiates heat generated inside an optical case main body to the outside while a sealing state is kept. CONSTITUTION:A rotation driving part 22 is fixed to the optical case main body 21 by a screw or the like. A rotary polygon mirror 25 is fitted to the driving part 22 in freely rotatably. By the driving of the driving part 22, the mirror 25 is rotated and a laser beam emitted from a laser unit is condensed by a lens group 27. Then, it is deflected to scan a photosensitive body. Besides, the main body 21 is covered with a cover member 29 and the inside of the main body 21 is sealed. At this time, the heat generated in the main body 21 is radiated to the outside without through an optical system by manufacturing the main body 21 by integrally molding two kinds of members whose heat conductivity is different such as a metallic part 23 and a resin part 24. |
