Improved voice coil motor

Abstract

The invention discloses an improved voice coil motor. The improved voice coil motor comprises an upper spring plate, an upper spring plate mounting rack and a lens carrier, wherein a plurality of supporting legs are arranged on the upper spring plate mounting rack; the upper spring plate is fixed on the supporting legs; the upper spring plate comprises fixed regions, an inner ring region and a plurality of elastic arm regions; the fixed regions are fixedly arranged on the supporting legs; the inner ring region is fixed on the lens carrier; the elastic arm regions connect the fixed regions and the inner ring region; the upper spring plate also comprises reinforcement plates connecting two adjacent fixed regions; and each reinforcement plate is vertical to the plane where the fixed regions are located. The improved voice coil motor has the following positive effects: the upper spring plate comprises the reinforcement plates connecting two adjacent fixed regions and each reinforcement plate is vertical to the plane where the fixed regions are located; therefore, the reinforcement plates can effectively improve the strength of the upper spring plate on the basis that the floor area is not increased, so that the upper spring plate is not liable to deform permanently during mounting and operation and the yield is effectively improved, thus reducing the manufacture cost to some extent.

Description

technical field [0001] The invention relates to a voice coil motor, in particular to a voice coil motor applied to a camera, a video camera, or a mobile phone with a camera function to drive a lens to move to adjust a focal length. Background technique [0002] A traditional voice coil motor includes an upper elastic piece, an upper elastic piece mounting frame and a lens carrier. The upper elastic piece mounting frame is provided with a plurality of supporting feet, and the upper elastic piece is fixed on the supporting feet. [0003] figure 1 It is a schematic diagram of the three-dimensional structure of the upper shrapnel in a traditional voice coil motor. figure 2 yes figure 1 A front view of the upper elastic sheet shown; this upper elastic sheet includes a fixed area (11) fixedly arranged on the support foot, an inner ring area (12) fixed on the lens carrier, and a fixed area (11) connected to the fixed area (11) ) and a plurality of elastic arm areas (13) of the ...

AI Technical Summary

Problems solved by technology

In order to reduce the occupied area, this kind of upper shrapnel does not have an outer ring area outside the elastic arm area, that is, there are gaps (17) between the fixed areas, which are not connected to each other, so the strength of this kind of upper shrapnel is very weak and extremely It is easy to deform. During the installation operation, if the force is slightly deviated, it will cause permanent deformation in the fixed area and the elastic arm area, which will affect the control accuracy of the final voice coil motor and cause waste products.

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