| 摘要 |
PROBLEM TO BE SOLVED: To prolong the lifetime of a rotating lamp while eliminating a brush of a direct current motor, and to simplify structure by providing a reflecting plate to be rotated around a lamp and a motor for driving the reflecting plate, and utilizing a stepping motor as a motor. SOLUTION: A reflecting plate 2 to be rotated around a lamp 1 is fixed to a base 22, and the base 22 is fixed to a large gear G2 to be rotated around a shaft 5 and driven by a small gear G1 directly fitted to an output shaft of a stepping motor 3. Since rotating speed of the stepping motor is low, and a required rotating speed can be obtained by a one-stage reduction mechanism, a driving mechanism can be simplified. Multiple kinds of rotating speeds corresponding to multiple kinds of purposes can be obtained by a single mechanical structure. A board 6 is provided with a known pulse motor driving circuit and a lamp lighting control circut. Rotation of the motor and lighting of the lamp can be controlled by the signal power level. |
