Actuator of optical pick-up device
View Patent ↗An actuator of an optical pick-up device includes two fixing frames, a lens holder disposed between the fixing frames and provided with a focus lens and coils, springs supporting the lens holder, the springs connecting two points of each fixing frame to the lens holder, each spring having one or more bends, a permanent magnet disposed facing the coils to generate magnetic field, and a yoke forming a path of the magnetic field generated by the permanent magnet.
1. An actuator of an optical pick-up device comprising:
two fixing frames;
a lens holder disposed between the fixing frames and provided with a focus lens and coils;
springs supporting the lens holder, the springs connecting two points of each fixing frame to the lens holder, each spring having one or more bends;
a permanent magnet disposed facing the coils to generate magnetic field; and
a yoke forming a path of the magnetic field generated by the permanent magnet, wherein the spring is provided with a lens holder coupling portion coupled to the lens holder, the lens holder coupling portion having a width greater than a portion between the lens holder coupling portion and the bend.
2. The actuator according to claim 1 , wherein the lens holder is provided with spring fixing portions where the springs are fixed, and the spring fixing portions are formed on the same horizontal plane.
3. The actuator according to claim 2 , wherein the spring fixing portions are formed on the same horizontal plane as portions of the fixing frame where the springs are fixed.
4. The actuator according to claim 1 , wherein the coils include focusing and tracking coils moving the lens holder in tracking and focusing directions, the tracking coil is disposed facing the fixing frame of the lens holder and the focusing coil wound around the lens holder.
5. The actuator according to claim 1 , wherein the spring is provided with a stationary portion coupled to the fixing frame.
6. An actuator of an optical pick-up device comprising:
two fixing frames;
a lens holder disposed between the fixing frames and provided with a focus lens and coils;
springs supporting the lens holder, the springs connecting two points of each fixing frame to the lens holder, each spring having one or more bends;
a permanent magnet disposed facing the coils to generate magnetic field; and
a yoke forming a path of the magnetic field generated by the permanent magnet, wherein the spring is provided with a damping area adjacent to the bend, the damping area being deposited with damping material.
7. The actuator according to claim 6 , wherein the spring is further provided with a stationary portion, the stationary portion being deposited with the damping material.
8. An actuator of an optical pick-up device, comprising:
two fixing frames;
lens holder disposed between the fixing frames and provided with a focus lens;
springs supporting the lens holder by connecting the fixing frames to the lens holder; and
a driving force generating unit including a coil and a permanent magnetic to generate driving force for moving the lens holder when control current is applied to the coil,
wherein the spring is provided with a lens holder coupling portion coupled to the lens holder, the lens holder coupling portion having a width greater than a portion between the lens holder coupling portion and the bend.
9. The actuator according to claim 8 , wherein the coil is formed on the lens holder and the permanent magnet is disposed facing the coil.
10. The actuator according to claim 8 , wherein the permanent magnet is formed on the lens holder and the coil is disposed facing the permanent magnet.
11. The actuator according to claim 8 , wherein the springs are fixed on tour spring fixing portions formed on the lens holder, the spring fixing portions being disposed on the same horizontal plane.
12. The actuator according to claim 8 , wherein the spring is provided with one or more bends.
13. An actuator of an optical pick-up device, comprising:
two fixing frames;
lens holder disposed between the fixing frames and provided with a focus lens;
springs supporting the lens holder by connecting the fixing frames to the lens holder; and
a driving force generating unit including a coil and a permanent magnetic to generate driving force for moving the lens holder when control current is applied to the coil,
wherein the spring has at least two damping areas adjacent to the bend, the damping areas being deposited with damping material.
14. The actuator according to claim 13 , wherein the spring is provided with a damping area adjacent to the bend and a stationary portion, the damping area and the stationary portion being deposited with damping material.
15. An actuator of an optical pick-up device, comprising:
a fixing frame;
a lens holder having a focus lens;
springs connecting the fixing frame to the lens holder to support the lens holder; and
a driving force generating unit including a coil and a permanent magnetic to generate driving force for moving the lens holder when control current is applied to the coil,
wherein the spring is provided with a lens holder coupling portion coupled to the lens holder, the lens holder coupling portion having a width greater than a portion between the lens holder coupling portion and the bend.
16. An actuator of an optical pick-up device, comprising:
a fixing frame;
a lens holder having a focus lens;
springs connecting the fixing frame to the lens holder to support the lens holder; and
a driving force generating unit including a coil and a permanent magnetic to generate driving force for moving the lens holder when control current is applied to the coil,
wherein the spring has at least two damping areas adjacent to the bend, the damping areas being deposited with damping material.
17. The actuator according to claim 16 , wherein the spring is provided with a damping area adjacent to the bend and a stationary portion, the damping area and the stationary portion being deposited with damping material.