Driving device

A technology for driving devices and moving parts, applied in focusing devices, electromechanical devices, installation, etc., can solve problems such as the limitation of contact rod material selection, achieve the effect of avoiding alignment problems and simplifying the assembly process

Inactive Publication Date: 2013-06-26
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The structure in which the magnets are arranged at both ends of the optical axis path of the optical lens group (that is, the up-and-down attraction method) will inevitably increase the height of the drive device; in addition, since there mu

Method used

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Examples

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Example Embodiment

[0014] See figure 1 , figure 2 and image 3 As shown, the driving device 100 provided by the embodiment of the present invention is used to drive a lens module (not shown) to move to achieve a focusing operation. The driving device 100 includes a fixed frame 11, a movable member 12, a carrier 13, a guide rod 14, The piezoelectric unit 15, the magnet 16, the magnetic sheet 17, the circuit board 18, the holder 19 and the contact rod 20.

[0015] The circuit board 18 is used to provide electrical energy to the piezoelectric unit 15 to make it work. When the circuit board 18 provides voltage to the piezoelectric unit 15, the piezoelectric unit 15 has mechanical deformation. Voltages in different directions have mechanical deformations in different directions. Large and small voltages have different mechanical deformations. The circuit board 18 may be a general printed circuit board or a flexible circuit board (FPCB).

[0016] The fixing frame 11 has a square structure with a first ac...

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PUM

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Abstract

A driving device is used for driving a lens module to move. The driving device comprises a fixing support, a movable piece, a magnet, a magnetic plate, a supporting body, a guiding rod, a contact rod and a piezoelectric unit. The fixing support is provided with an accommodating space and an opening. The movable piece is arranged in the accommodating space and provided with a through hole. The magnet is fixed on the fixing support. The magnetic plate is fixed on the movable piece, and acting force between the magnet and the magnetic plate can fix the movable piece on a preset position in the fixing support. The supporting body is matched with the fixing support and used for accommodating the movable piece. The guiding rod penetrates through the through hole of the movable piece, and two ends of the guiding rod are fixed on the fixing support and the supporting body respectively. The contact rod is fixed on the movable piece. The piezoelectric unit is fixed in the opening, butts against the contact rod and is used for deforming to generate friction between the piezoelectric unit and the contact rod to drive the movable piece to move in the accommodating space along the guiding rod.

Description

technical field [0001] The invention relates to a driving device, in particular to a driving device using a piezoelectric unit. Background technique [0002] A digital camera or a mobile phone with a shooting function is equipped with at least one lens module, and the function of the lens module is to drive the optical lens or the optical lens group to move along the optical axis to achieve auto-focus and / or zoom functions. [0003] One of the moving methods of the optical lens group is a piezoelectric motor, which has a piezoelectric unit and a contact rod in contact with the piezoelectric unit. , the movable part can be fixed without moving, so as to prevent damage to the lens module), and the two magnets are used to attract the contact rod fixed on the movable part to achieve this. The magnets are located on both sides of the optical axis path of the optical lens group At the end, the piezoelectric unit is located between the two magnets, the piezoelectric unit is deform...

Claims

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Application Information

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IPC IPC(8): G02B7/09G03B13/36H02K33/18
Inventor 吴松青
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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