| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-cost heat radiation structure for laser deflecting scanner and to prevent electric charging and discharging in an optical box. SOLUTION: In a deflecting scanner where a rotary polygon mirror 4 which deflects laser light and an electric motor which rotates and drives it are provided and the motor M is provided on as metallic substrate 6, a steel plate 3 for heat absorption is joined to the rear face of the substrate 6, and a part of the steel plate 3 is exposed to the outside of the optical box. A heat transmissive adhesive or a conductive adhesive is interposed between the substrate 6 and the steel plate 3. Further, a heat absorption plate 9 is brought into contact with an IC package for motor driving and is partially exposed to the outside of the optical box. A heat transmissive adhesive 10 is interposed between the IC package 5 and the heat absorption plate 9. The heat absorption plate 9 is made short and is stored in the optical box and is brought into contact with the steel plate 3. |
