Active device with shape memory alloy

Abstract

The present invention provides an activating device which is provided with a shape memory alloy. The activating device with the shape memory alloy comprises the following components: a base; a plurality of sliding blocks which are installed on the base; a carrier which is installed on the plurality of sliding blocks; the shape memory alloy which is installed outside the plurality of sliding blocks and surrounds the sliding block; and an elastic component which is positioned on the carrier and surrounds the periphery of carrier, wherein, the length of shape memory alloy is reduced through the process of martensite transformation and austenite transformation of shape memory alloy. The shape memory alloy extrudes the sliding block for moving the sliding block inwards. The carrier is caused to move inwards and compress the elastic component. The invention uses the length reducing of shape memory alloy caused by the process of martensite transformation and austenite transformation to makes that the sliding block, the carrier and the elastic component act respectively. Furthermore the heat conductivity of base is used for accelerating the heat dissipation of shape memory alloy for increasing the action reaction rate of carrier.

Description

technical field [0001] The present invention relates to an action device, in particular to an action device with a shape memory alloy that utilizes the phase transformation of the shape memory alloy to cause length contraction. Background technique [0002] The modern electronics industry continues to flourish. Various electronic and digital products make people's lives more comfortable and convenient. In recent years, digital cameras and camera phones have become the most widely used electronic devices in people's lives. One of the digital products. [0003] The lens module of an existing digital camera or camera phone includes: a casing, an optical lens and an image sensor. Automatically adjust to achieve the function of focusing. [0004] The lens modules of existing digital cameras or camera phones basically must meet the requirements of lightness, thinness, and shortness, and must have precision and durability. In digital cameras or camera phones, the optical lens fo...

AI Technical Summary

Problems solved by technology

In digital cameras or camera phones, the optical lens focusing method used, whether it is manual or electric motor (linear or nonlinear drive displacement) to adjust the mode and structure of the mechanical components of the focal length, in the emphasis on size miniaturization and Under the requirement of light weight, it will be limited by the limited space and weight, so the optical lens is subject to many restrictions in terms of focusing ratio and function

[0005] In the prior art, the lens module is set in a balanced state by using the shrapnel and the electromagnetic force, but the shrapnel is easily deformed by external force, including vibration, homing or long-term use, which affects the stability and accuracy of lens movement. Therefore, there are still gaps in the prior art and need to be improved

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