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lens drive

A technology of lens driving device and lens barrel, which is applied in the direction of installation, machine/engine, generator/motor, etc., can solve the problems of being easily interfered by magnetic fields, poor reliability, etc., and achieves simple structure, easy assembly, and high stability Effect

Active Publication Date: 2021-07-30
AAC OPTICS SOLUTIONS PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the lens barrel in the related art moves under the action of electromagnetic force, which is easily disturbed by the magnetic field, and additional Hall elements need to be added to detect the shaking of the lens barrel, which has poor reliability in special environments

Method used

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Embodiment 1

[0030] see Figure 1 to Figure 3 , the present invention provides a lens driving device 100, which includes a base 1, an upper cover 2 that is closed with the base 1 to form a storage space, a lens barrel 3 accommodated in the storage space, and sandwiched between the base 1 and the two elastic pieces 4 between the lens barrel 3 and the conductive wire 5 connecting the two elastic pieces 4 .

[0031] The base 1 includes a base 11, a conductive terminal 12 with one end embedded in the base 11 and the other end electrically connected to the outside world, fixed on the end of the base 11 close to the lens barrel 3 and along the optical axis The guide column 13 arranged in the direction and the metal sleeve 14 sleeved on the outer surface of the guide column 13 .

[0032] The conductive terminal 12 includes a first through hole 120 penetrating along the optical axis direction, and the base 11 includes a second through hole 110 penetrating through the base 11 and corresponding to ...

Embodiment 2

[0043] Compared with Embodiment 1, the different technical features of this embodiment are:

[0044] Both the first elastic part and the second elastic part are made of two-way memory alloy. When the first elastic member and the second elastic member are supplied with electric current, the temperature of the first elastic member and the second elastic member increases due to the thermal effect, and they begin to shrink under the action of the shape memory effect, driving the The lens barrel 3 moves toward the direction close to the base 1; when the current is reduced or the energization is stopped, the temperature of the first elastic member and the second elastic member decreases, and the first elastic member and the second elastic member The elastic member returns to the initial state, driving the lens barrel 3 to move away from the base 1 to the initial position. It can be understood that, the first elastic member and the second elastic member are connected in series, and ...

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Abstract

The invention provides a lens driving device. The lens driving device includes a base, a lens barrel, two elastic members sandwiched between the lens barrel and the base, and a device that connects the two elastic members and is used to form a current loop with the two elastic members. Conductive wires, the base includes a base and conductive terminals embedded in the base for electrical connection with the outside world, the elastic member is electrically connected to the conductive terminals, and is used to drive the lens barrel to reciprocate along the optical axis movement, and at least one of the two elastic parts is made of memory alloy. The lens driving device provided by the present invention drives the lens barrel to reciprocate along the optical axis direction by arranging an elastic member made of memory alloy, does not need traditional voice coil and magnetic steel for driving, has no magnetic field interference problem, and has high stability and the lens driving device has a simple structure, is easy to assemble, does not need to add additional Hall elements, and can realize precise control by using its own resistance change.

Description

【Technical field】 [0001] The invention relates to a driving device, in particular to a lens driving device. 【Background technique】 [0002] With the development of camera technology, lens driving devices are widely used in various camera devices. The combination of the lens driving device and various portable electronic devices such as mobile phones, video cameras, computers, etc., is favored by consumers. [0003] The driving mechanism of the lens driving device in the related art is usually composed of a coil and a magnetic steel to form a driving structure. The coil and the magnetic steel are respectively fixed on the lens barrel and the casing, and the lens barrel is supported on the casing through a shrapnel. When the When current is applied to the coil, the coil and the magnetic steel generate an electromagnetic field, and the coil is affected by the electromagnetic force to drive the magnetic steel to move along a straight line, thereby driving the lens barrel to mov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/02G03B30/00
CPCG02B7/02G02B7/021F03G7/065G02B7/08G02B7/04H02N10/00
Inventor 韦锁和傅济成
Owner AAC OPTICS SOLUTIONS PTE LTD
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