Lens driving device, auto-focusing camera, and mobile terminal device with camera
A lens driving device and lens technology, which can be applied to cameras, focusing devices, electromechanical devices, etc., and can solve problems such as attraction
Active Publication Date: 2015-03-18
NEW SHICOH MOTOR CO LTD
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Problems solved by technology
[0005] However, in the technology of Patent Document 2, like the technology of Patent Document 1, the magnetism of the position detection magnet fixed on the lens support is detected by the magnetism detection sensor. Magnets are bound to have problems being attracted to the yoke
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[0052] Below, refer to the accompanying drawings Figure 1 to Figure 7 , the first embodiment of the present invention will be described in detail. A lens driving device 1 according to the first embodiment is a lens driving device for an autofocus camera incorporated in a mobile phone.
[0053] This lens driving device 1, such as figure 1 As shown, there are: a lens support body 5 that supports a lens (not shown) on the inner periphery, a yoke 3 that constitutes a part of a fixed body that supports the lens support body 5 to move freely on the inner periphery side, and a light beam on the yoke iron 3 . The frame 7 and the front spring 9 are arranged on the front side in the axial direction, and the base 8 and the rear spring 11 are arranged on the rear side of the yoke 3 . A rear spacer (insulator) 15 is disposed between the rear spring 11 and the yoke 3 . In addition, the coil body 4 is fixed to the outer periphery of the lens support body 5 . The frame 7, the front sprin...
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The invention provides a lens driving device, an auto-focusing camera, and a mobile terminal device with a camera having the small structure and the ability of detecting the X-Y directional position orthogonal to the optical axis. A lens supporting body 5 is provided with a first coil 19 winded on the periphery; at least two second coils 16a,16b, which are disposed on the periphery at an interval of 90degrees, are used to move the lens supporting body towards the X-Y direction orthogonal to the optical axis; a position detection magnet 43 in the X direction; a position detection magnet 45 in the Y direction. A yoke 3 is provided with a magnet 17 used for driving the lens supporting body 5. A magnetosphere detection element 49 in the X direction opposite to the position detection magnet 43 in the X direction is disposed on the base 8. A magnetosphere detection element in the Y direction opposite to the position detection magnet is also disposed on the base 8. On the yoke 3, a space part 13 is formed on the positions respectively opposite to the position detection magnet 43 in the X direction and the position detection magnet 45 in the Y direction.
Description
technical field [0001] The present invention relates to a lens driving device, an auto-focus camera, and a mobile terminal device with a camera. Background technique [0002] Patent Document 1 (JP-A-2010-85448) discloses a lens driving device for a compact camera in which a lens support moves in the X-Y direction in response to a shake sensor. In addition, the technique of this Patent Document 1 discloses that a magnet for position detection is provided on a fixed body, and a magnetism detection sensor is provided on a lens support to detect the amount of movement of the lens support in the X direction and the Y direction. [0003] In Patent Document 1, since the movement of the lens support in the direction of the optical axis is performed by the drive shaft of the motor, a motor and a power conversion mechanism that converts rotation into linear motion are required, so the size of the device will increase. The problem. [0004] In contrast, in the technique of Patent Doc...
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IPC IPC(8): G02B7/09G03B13/36H02K33/18
Inventor 白木学市川和広
Owner NEW SHICOH MOTOR CO LTD