Optical module and camera module

A technology of optical modules and optical parts, which is applied to cameras, focusing devices of cameras, optics, etc., can solve the problems of changing the shape of the lens driving device, no freedom of shape design, and no freedom of shape design of stepping motors, and achieves the suppression of Power loss, the effect of ensuring movement accuracy
CN1661410AInactive Publication Date: 2005-08-31SEIKO INSTR INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SEIKO INSTR INC
Publication Date
2005-08-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

Provided is an optical module that is thin, allows freedom of design in configuration, and assures the accuracy of movement of an optical part while suppressing power loss. A stepping motor 26 and a lens barrel 27 that is moved by moving means 28 are positioned offset from each other along a base plate 23 , and the optical axis of the lens barrel 27 and the axis of a rotor 37 provided in the stepping motor 26 are arranged in parallel with each other on one surface of the base plate 23 . Further, a reduction gear train 29 , which operatively couples the rotor 37 and the moving means 28 together, is arranged on the one surface. The stepping motor 26 consists of a flat-shaped motor equipped with: coil blocks 35 each having an excitation coil 39 horizontally mounted along the base plate 23 ; a yoke 36 whose magnetic path portion 36 a excluding end portions 36 b and 36 c connected with the coil blocks 35 is provided so as not to overlap the coil blocks 35 ; and the rotor 37 arranged within a rotor pass-through hole 40 of the yoke 36.
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Description

technical field

[0001] The present invention relates to an optical module provided with optical components that move for focus adjustment, zooming, etc., and particularly relates to an optical module suitable for mounting on a thin electronic device, such as a card-type digital camera or a mobile phone with a camera function, and the like. camera module. Background technique

[0002] In the past, the following lens driving device (optical module) is known, that is, in order to move the lens barrel holding the lens to adjust the focus, the drive shaft of the cylindrical stepping motor is formed with a feed screw, and the drive shaft is moved from The protruding rack member of the lens barrel holder that supports the lens barrel is engaged with the feed screw, and as the stepping motor rotates in the forward and reverse directions, the lens barrel is moved along the optical axis via the rack member to perform focusing ( For example, refer to Patent Document 1).

[0003] In a...

Claims

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