Liquid lens focusing and anti-shake device, camera module and electronic equipment

Abstract

The invention discloses a focusing device of a liquid lens, a camera module and electronic equipment. A liquid lens focusing and anti-shake device comprises a liquid lens; an SMA actuator which comprises an SMA wire, a connecting rod, a supporting part and a first elastic arm, wherein one end of the connecting rod is connected with the SMA wire, one end of the connecting rod is elastically connected with the supporting part, the first elastic arm is arranged between the connecting rod and the supporting part, and the first elastic arm can be elastically bent. The device also comprises an adjusting ring connected with one end of the connecting rod, and the SMA wire can drive the adjusting ring to move through the connecting rod to contact and extrude the liquid lens. The adjusting ring isdriven by an actuator composed of the SAM wire, the connecting rod, the supporting part and the first elastic arm, and electromagnetic interference is not generated to influence normal work of otherelectronic elements. Moreover, the first elastic arm enables the connecting rod to elastically swing relative to the supporting part, so that the displacement of the adjusting ring can be greater thanthe shrinkage of the SMA wire, a relatively large focusing stroke can be realized under the condition that the size of the actuator is relatively small, and miniaturization is facilitated.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a liquid lens focusing and anti-shaking device, a camera module and electronic equipment. Background technique [0002] The liquid lens usually includes a ring-shaped frame, a light-transmitting cover plate and a light-transmitting film that respectively close the two ends of the ring-shaped frame. The shape of the liquid, and then change the curvature and focal length of the liquid lens. [0003] A camera module provided with a liquid lens generally also includes an adjustment assembly and an actuator. The adjustment assembly is arranged on the side of the liquid lens with a light-transmitting film, and the actuator is used to drive the movement of the adjustment assembly so that it contacts and squeezes the light-transmitting film. pressure or separation. The actuator of the camera module generally adopts a voice coil motor or an SMA actuator. [0004] The voice coil motor generat...

AI Technical Summary

Problems solved by technology

Existing SMA actuators usually directly pull the adjustment assembly through the SMA wire, so the driving stroke of the adjustment assembly is usually not greater than the shrinkage of the SMA wire, and the movement stroke can only be made by increasing the overall scale of the SMA actuator. Larger, so it is not conducive to the miniaturization of the liquid lens focusing device

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