| 摘要 |
PURPOSE:To decrease a read/write error of optical information and to improve the S/N by arranging a coil spring formed with thin and long metallic wires wound closely to a vertical face and an optical aixs and conducting the automatic focus operation so as to reduce excessive vibration. CONSTITUTION:A lens holding frame 13 and an outer frame 14 are applied with plastic molding after plastic molding molds are arranged while whose centers are made coincident and coil springs 11 are arranged with equal angle. An outer circumference fixing metal fixture 15 is inserted to a faucet part 14a of one set of lens support members 12 made of the spring 11, the center of insertion is made coincident automatically and a claw 15a makes vertical positioning of a driving magnetic circuit 9. After a lens barrel 17 is assembled and inserted with an actuator coil 10 and luminous flux stopping objective lens 4, an upper side lens support member 12 is inserted. The ease of assembling is ensured while keeping the accuracy and very large damping as a vibration system by the coil springs is obtained. |
