Shutter driving device for camera module

Abstract

The invention relates to a shutter driving device for a camera module, which comprises a framework, shutter blades, permanent magnets, springs, two straight line sidling type guide structures, an electromagnet and a light through region, wherein the shutter blades are positioned on the straight line sliding type guide structures and can slide on the straight line sliding type guide structures, the electromagnet is fixed at the middle of the straight line sliding type guide structures, the permanent magnets are fixed on the shutter blades, opposite attract or repellent action force between the permanent magnets and the electromagnet is generated by applying different directions of current on the electromagnet to drive the sliding of the shutter blades and realize the opening and the closing of the shutter blades, and a light path is opened or closed. The electromagnet is adopted to drive, the shutter blades slide in a straight line manner by the guide structures, so that the size of the shutter driving device is reduced, the shutter stability is improved, and the miniaturization of electronic imaging equipment is finally guaranteed.

Description

technical field [0001] The invention relates to a shutter driving device, in particular to a shutter driving device for a camera module. Background technique [0002] In recent years, the size of the camera module has shrunk with the development of technology, but the size of the shutter driver still restricts the size of the camera module, especially in the infrared industry. The traditional shutter driving device uses a motor to drive the blades to rotate or a solenoid valve to drive the blades to move to realize the opening and closing of the shutter. [0003] figure 1 It is a perspective view of the structure of a conventional rotary shutter drive device for a camera module. As shown in the figure, the device includes a motor 1 , a single-handle shutter blade 2 , an image plane unit 3 and a bracket 4 . The motor 1 is fixed on the bracket 4, and the single-handle shutter blade 2 is fixed on the shaft of the motor 1. The single-handle shutter blade 2 rotates under the dr...

AI Technical Summary

Problems solved by technology

[0005] There are some disadvantages in the above-mentioned traditional shutter driving devices, figure 1 The disadvantage of the rotary shutter driving device shown is that the shutter blades must be driven by the motor to rotate to realize the opening and closing of the aperture light path. The volume of the motor and the space occupied by the shutter blades after they are rotated out limit the miniaturization of the camera module; figure 2 The disadvantage of the sliding shutter drive device is that the rocker must be long enough to meet the travel requirements of the shutter blades. After the rocker is lengthened, the arm of force increases, resulting in an increase in the driving force of the solenoid valve. Only a larger solenoid valve can be used, which eventually leads to a loss of power. increase, the volume will also increase rapidly, which is not conducive to the development of low power consumption and miniaturization of camera modules

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