Driving device, camera module and electronic device

Abstract

The present invention provides a driving device, a camera module and an electronic device. The driving device comprises a base, a carrier and a driving member, the carrier is arranged on the base andcan move up and down relative to the base, a first end of the driving member is fixedly connected to the base, a second end opposite to the first end is fixedly connected to the carrier, and a part between the first end and the second end of the driving member is connected to the carrier. A height difference exists between the part between the first end and the second end and the first end in thevertical direction, and the driving member can stretch out and draw back to drive the carrier to move vertically relative to the base. According to the driving device, the camera module and the electronic device, one end of the driving member is fixed to the base, and the other end of the driving member can move along with the carrier, so that the conversion rate of converting the shrinkage amountof the driving member into carrier displacement is high. Meanwhile, the conversion rate of converting the shrinkage amount of the driving member into the displacement of the carrier is high, so thatthe required line length of the driving member is short, the occupied space of the driving member is reduced, and miniaturization of the driving device is facilitated; moreover, the shrinkage amount of the driving member is small, the service life of the driving member is long, and the service life of the driving device can be prolonged.

Description

technical field [0001] The invention relates to the field of imaging technology, in particular to a driving device, a camera module and electronic equipment. Background technique [0002] With the advancement of science and technology, the application of camera modules is becoming more and more extensive. At present, in addition to cameras, electronic products such as mobile phones and computers are equipped with camera modules to facilitate people to take pictures anytime and anywhere, bringing convenience to people's lives. with fun. The camera module includes a fixed-focus camera module and a zoom camera module. In the zoom camera module, the lens can be driven by a driving device to move to achieve focusing. [0003] A driving device includes a base, a carrier and a memory alloy (SMA) part, the carrier is movably arranged on the base, the two ends of the memory alloy part are fixed on the base, the middle part is hung on the carrier, and the memory alloy part is energiz...

AI Technical Summary

Problems solved by technology

Therefore, on the one hand, due to the low conversion rate of the shrinkage of the memory alloy parts into the carrier displacement H, the memory alloy parts need to be longer and will take up more space, which is not conducive to the miniaturization of the drive device; on the other hand, The longer the memory alloy part shrinks, the shorter its life will be. The conversion rate of the shrinkage of the memory alloy part into the carrier displacement H is low, resulting in a larger shrinkage of the memory alloy part, which will affect the service life of the drive device. cause adverse effects

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