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Linear driving apparatus and lens driving apparatus

A linear drive and linear movement technology, applied in electromechanical devices, installations, electric components, etc., can solve problems such as difficulty and easy impact on the lens support.

Active Publication Date: 2011-09-28
NEW SHICOH MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in a lens driving device used in a portable compact camera, etc., it is necessary to make the lens move in the direction of the optical axis stably and accurately according to the desired amount of movement in a narrow space. Linear drive, it is difficult to realize it only with this simple structure
[0004] In addition, generally this kind of small camera etc. will be put into a pocket or a small bag and carried along in many cases, so the lens driving device of the small camera will often suffer from some bumps or impacts during carrying (not in use). This kind of shaking and bumping, in the above-mentioned linear drive device that drives the lens through the action of electromagnetic force, the lens support body is easily impacted. Therefore, it is necessary to consider that the correctly positioned lens will be misaligned and shifted.

Method used

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  • Linear driving apparatus and lens driving apparatus
  • Linear driving apparatus and lens driving apparatus
  • Linear driving apparatus and lens driving apparatus

Examples

Experimental program
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no. 1 example

[0032] Figure 1 to Figure 3 is a schematic diagram of the first embodiment of the present invention. and also, figure 1 (a) is a sectional view of the linear drive device 1 of the present embodiment; figure 1 (b) is a vertical view of the linear drive device 1 of the present embodiment; figure 2 Yes figure 1 An exploded perspective view of the linear drive device 1; image 3 Yesfigure 1 A perspective illustration of the assembly sequence of the linear drive 1 .

[0033] The linear drive device 1 related to this embodiment is a coil movable type linear drive device. The linear drive device 1 has a pair of ring openings 2 and 4 interacting with a box-shaped storage space S, a magnet 6 disposed in the storage space S, and a coil 8 disposed in the storage space S. In this case, the first ring opening 2 of one of them is in the shape of a plate; in addition, the cross section of the second ring opening 4 of the other is in a concave shape.

[0034] The current flowing into...

no. 2 example

[0043] Figure 4 to Figure 6 It is a schematic diagram of the second embodiment of the present invention. and also, Figure 4 (a) is a sectional view of the linear drive device 1A of the present embodiment; Figure 4 (b) is a longitudinal sectional view of the linear drive device 1A of the present embodiment; Figure 5 Yes Figure 4 An exploded perspective view of the linear drive device 1A; Image 6 Yes Figure 4 A perspective illustration of the assembly sequence of the linear drive device 1A.

[0044] The linear drive device 1A according to this embodiment is a magnet movable type linear drive device. The linear drive device 1A has a pair of ring openings 32 and 34 formed by interacting with a box-shaped storage space S; a magnet 36 disposed in the storage space S; and a coil 38 disposed in the storage space S. In this case, one of the first ring openings 32 has a concave shape in cross section; and the other second ring opening 34 has a plate shape. In addition, th...

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Abstract

The invention provides a linear driving device and a lens driving device similar to the linear driving device, aiming at leading the driven body to be stable, to move according to the expected movement quantity, and not to generate a displacement even when the driven body is impacted. The device is characterized by comprising a box-shaped collar extension with a receiving space, a magnetic stone in the receiving space, and a coil in the receiving space and a magnetic body which generates a magnetic attraction force between the magnetic stones; wherein, the driven body to be driven bears the magnetic attraction force generally applied between the magnetic stone and the magnetic body; simultaneously, the electromagnetic force excited by a magnetic field formed by the action of the current flowing into the coil and the magnetic stone moves linearly.

Description

technical field [0001] The invention relates to a linear driving device which relies on the action of electromagnetic force to drive a driven body to move linearly and a lens driving device using the linear driving device. Background technique [0002] Generally speaking, this kind of linear drive device that drives the drive body to perform linear drive by the interaction of the current passing through the coil and the magnetic field formed by the magnet to induce electromagnetic force is well known. In addition, it is widely used in various technical fields. For example, such a small linear drive device is used in a lens drive device built in a digital camera or a mobile phone for the purpose of driving a variable focus lens and an autofocus lens used in a portable compact camera (see Japanese No. 2002-23037 patent bulletin). [0003] However, in a lens driving device used in a portable compact camera, etc., it is necessary to make the lens move in the direction of the o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/02G02B7/04H02K41/02H02K41/03
Inventor 白木学浅川聪关口直树吉江守正
Owner NEW SHICOH MOTOR CO LTD