Lens drive device and camera module and optical instrument including the same

Abstract

The frictional force between the bobbin / housing and the ball member can be easily and freely designed. A lens drive device capable of stably supporting the F-movement section, and a camera module including the same. We provide lures and optical instruments. [Solution] The embodiment includes a base, a housing disposed on the base, a bobbin disposed inside the housing, a first magnet disposed on the bobbin, a coil disposed in the housing opposite the first magnet, a second magnet disposed on the bobbin at a distance from the first magnet, a yoke disposed in the housing opposite the second magnet, a ball member disposed between the bobbin and the housing, and a position sensor disposed on the base opposite the first magnet or the second magnet in the optical axis direction.

Claims

1. Bass and, A housing placed on the base, A bobbin placed inside the housing, The first magnet is placed on the bobbin, A coil is disposed in the housing opposite to the first magnet, A second magnet is positioned on the bobbin at a distance from the first magnet, A yoke is positioned in the housing opposite to the second magnet, A ball member disposed between the bobbin and the housing, The base is positioned opposite the first magnet or the second magnet in the optical axis direction. A lens drive device including a position sensor.

2. The second magnet is positioned between the yoke and the first magnet. Claim 1, wherein the first magnet is positioned between the second magnet and the coil. The lens drive device described above.

3. The housing includes a circuit board, The lens driving device according to claim 1, wherein the coil is electrically connected to the circuit board.

4. The lens drive according to claim 3, which includes an energizing member electrically connected to the position sensor. Device.

5. In the direction perpendicular to the optical axis, the position sensor is connected to the first magnet or the second magnet. A lens driving device according to claim 1, which does not overlap with the net.

6. The position sensor does not overlap with the yoke in a direction perpendicular to the optical axis. The lens driving device according to claim 1.

7. The first magnet is positioned on the first side of the bobbin, and the second magnet is positioned on the bobbin It is located on the second side of the bobbin, which is opposite to the first side of the bottle, The coil is positioned on the first side of the housing, and the yoke is positioned on the first side of the housing. The lens according to claim 1, which is positioned on the second side of the housing, opposite to the first side. Drive unit.

8. The ball member is located on the side of the bobbin where the second magnet is positioned and the yoke Displaced between the side of the housing in which it is positioned, An attractive force acts between the yoke and the second magnet, as described in claim 1. Drive unit.

9. The ball member is located on the side of the bobbin where the first magnet is positioned and the coil is located Displaced between the side of the housing in which it is positioned, A repulsive force acts between the yoke and the second magnet, as described in claim 1. motion device.

10. The aforementioned yoke is made of a magnetic material, In the optical axis direction, the length of the yoke is different from the length of the second magnet in the optical axis direction. The lens driving device according to claim 1.

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