| 摘要 |
PURPOSE:To simplify a structure of a lens barrel containing a motor by providing a commutator for executing a power supply to a coil and a brush on a lens driving rotor coil bearing part. CONSTITUTION:A focusing control signal is transferred to a coil spring 34 through an electric wire (l), sent to a commutator 40a installed to the inside of a cylindrical coil member 18 through a ball receiving and power supplying member 36 for forming a brush together with the coil spring, and a power supply is executed to the coil member 18. As a result, by a constitution of a permanent magnet 16, the coil member 18, and a yoke member 26, the coil member 18 executes a rotational motion around an optical axis, and a lens holding frame 20 of a focusing lens G5 moves in the parallel direction to the optical axis. When focusing is detected, a power supply to the coil member is stopped. |
