Invention Grant
US08842149B2 Optical scanning device with heat-insulating room capable of insulating heat transferred upward from device interior and image forming apparatus with the optical scanning device 有权
具有隔热室的光学扫描装置,其能够绝热,从设备内部向上传递,并且具有光学扫描装置的成像装置

Optical scanning device with heat-insulating room capable of insulating heat transferred upward from device interior and image forming apparatus with the optical scanning device
Abstract:
An exposure device includes a polygon motor, an fθ lens, and a heat-insulating room. The polygon motor is driven into rotation while producing heat, which makes it likely that the temperature of a portion of the fθ lens near a housing right wall becomes lower than that of a portion of the fθ lens near a housing left wall. The exposure device further includes a recess located above the fθ lens and extended in a right-and-left direction. The heat-insulating room is formed by disposing a plate above the portion of the fθ lens near the housing right wall to cover the recess. Thus, the plate restricts upward heat release from the portion of the fθ lens near the housing right wall.
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