| 摘要 |
PURPOSE: An actuator for optical pickup is provided to make a suitability for a tilt servo by driving an objective lens corresponding to volume of tilt of a disk at a radial direction and a tangential direction. CONSTITUTION: An actuator is divided into an operation part and a fixing part. The operation part is a bobbin to place an objective lens(42), a first to a fourth focusing coil(52a to 52d) to be wound at the bobbin(44) being divided into a radial direction and a tangential direction of the disk, a first to a fourth tracking coil(50a to 50d) to be adhered with each focusing coils(52a to 52d) and a first to an eighth wire spring(54a to 54h) to be connected to PCB(36a,36b) which is installed at side wall of the bobbin(44). The objective lens(42) plays a role to focus light beam made an incidence from light source. The fixing part includes a permanent magnet(46), a yoke(48) and a frame. The permanent magnet is adhered to the yoke(48) to be faced with the tracking coils(50a to 50d) and the focusing coils(52a,52b). The yoke(48) is composed of magnetic substance of steel series, and is bent in a "??" shape to wrap the upper and the lower of the bobbin(44). |
