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Lens drive device

A lens drive device and shaft drive technology, which is applied in installation, optics, instruments, etc., can solve the problems of high manufacturing cost of permanent magnets and structures without magnet positioning, and achieve the effect of uniform electromagnetic force and reduced deviation

Inactive Publication Date: 2017-07-07
ALPS ALPINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to control the tolerance of the thickness dimension of the permanent magnet to be extremely small, resulting in an increase in the manufacturing cost of the permanent magnet.
[0014] In the lens driving device described in Patent Document 2, the magnet is fixed in the opening formed on the wall of the magnet holder, but there is no structure for positioning the magnet in the direction facing the first coil, so it is difficult to accurately Good management of the distance between the individual magnets and the first coil

Method used

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Examples

Experimental program
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Embodiment Construction

[0080] figure 1 The shown lens driving device 1 is mounted on a mobile phone, a portable information terminal device, or the like together with an imaging element. Although omitted in the following embodiments, a lens body (lens barrel) facing the imaging element can be mounted on the lens holder 30 of the lens driving device 1 . The lens holder 30 is driven along the optical axis of the lens body to perform automatic focus adjustment, and the lens holder 30 is driven along a direction intersecting the optical axis to perform hand shake correction.

[0081] In each figure, the Z1 direction is above the lens driving device 1 , and the Z2 direction is below the lens driving device 1 . The Z1 direction is the front where the object to be imaged by the imaging element is located, and the Z2 direction is the rear where the imaging element is located.

[0082] figure 1 The overall structure of the lens driving device 1 is shown, figure 2 The lens driving device 1 showing the st...

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PUM

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Abstract

To provide a lens drive device capable of reducing the fluctuation of a counter distance between a shaft drive coil and a magnet provided on a lens holder in a movable unit supported by a suspension wire. A lens holder 30 is supported by a leaf spring on a support member 21 that is provided on a movable unit in a manner capable of being freely operated. A leg part 23 of the support member 21 includes an X direction positioning part 25x and a Y direction positioning part 25y. An inner side counter surface 28a of a magnet 28x is positioned by abutting against the X direction positioning part 25x, and the inner side counter surface 28a of a magnet 28y is positioned by abutting against the Y direction positioning part 25y. Thus, without being affected by fluctuation of a thickness of the magnet, a counter distance delta2 can be set.

Description

technical field [0001] The present invention relates to a lens driving device in which a lens holder is movably supported along the optical axis direction of the lens on a supporting member, and more particularly relates to the ability to determine with high precision the relationship between an axis driving coil provided on the lens holder and a magnet fixed to the supporting member. The lens driving device with the opposite spacing between them. Background technique [0002] Patent Document 1 describes an invention related to a lens driving device. [0003] In the lens driving device described in Patent Document 1, four suspension wires are fixed to a base, and an AF (autofocus) unit is supported on the front ends of the suspension wires. [0004] In the AF unit, a lens holder on which a lens is mounted is provided inside the magnet holder. An upper leaf spring is fixed to the upper end of the magnet holder, and the upper end of the lens holder is supported by the upper ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/04
CPCG02B7/08G02B27/646G02B7/04
Inventor 石黑克之
Owner ALPS ALPINE CO LTD