| 摘要 |
PROBLEM TO BE SOLVED: To prevent the excessive temperature rise of electronic parts. SOLUTION: A circuit board 28 on which the respective parts of a light deflector 10 are disposed is fixed by a housing 18. A groove is engraved on the housing 18 so as to form a gap as an air inflow port 42 between the housing 18 and the back surface of the circuit board 28 when the circuit board 28 is fixed by the housing 18. When the conduction of current to a coil for driving 32 is switched and a rotor 16 is rotated, air flows in from the port 42 and the current of air is generated in a gap formed between a magnet for driving 14 and the coil 32. The air flowing in from the port 42 goes toward an IC for driving 40 by the action of the generated current of air. |
