| 摘要 |
PURPOSE:To provide a light deflection device which improves the cooling efficiency of a housing by forcible air cooling and whose temperature-rise is reduced. CONSTITUTION:In the light deflection device 10 obtained by supporting a rotating member 13 to which a mirror 22 is fitted on a housing 11 through a bearing freely rotatably and driving and rotating the rotating member 13 by a motor M; plural fins 30 set almost in parallel with air flow for the forcible air cooling are provided on at least one part of the outside surface of the housing 11. By the fins 30, the heat radiation of the housing 11 is promoted and the cooling efficiency is improved. Besides, the temperature-rise of the device 10 is suppressed and printing quality is prevented from being deteriorated caused by thermal deformation. |
