Bistable electric switch with shape memory actuator

具有形状记忆致动器的双稳态电开关

Abstract

A bistable electric switch comprises as actuators a pair of opposing SMA wires (1, 2) acting on a drive element (6) integral with a snap-action spring (4) so as to toggle it between two stable positions corresponding to two operating positions of the switch, the drive element (6) being shorter than the distance existing between the two opposing SMA wires (1, 2) when one of the SMA wires is contracted and the other SMA wire is uncontracted. In this way, the entire force exerted by the activated SMA wire is used to overcome the resistance of the snap-action spring (4), therefore it is possible to use a stronger spring that provides a greater circuit closure force thus assuring a better electric contact and increasing the reliability of the switch.
一种双稳态电开关,该双稳态电开关包括作为致动器的一对相对的SMA线材(1、2),该对相对的SMA线材(1、2)作用于与速动弹簧(4)构成一体的驱动元件(6)以在与开关的两个操作位置对应的两个稳定位置之间拨动速动弹簧(4),驱动元件(6)比当SMA线材之一收缩并且另一SMA线材未收缩时两个相对的SMA线材(1、2)之间存在的距离更短。这样,由被激活的SMA线材所施加的全部力用于克服速动弹簧(4)的阻力,因此可以使用提供更大的电路闭合力的更强的弹簧,从而确保了更好的电接触并且增加了开关的可靠性。

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (4)

    Publication numberPublication dateAssigneeTitle
    CN-101465240-AJune 24, 2009毛秀娣;曾令斌Electrothermic steam control switch
    CN-201302965-YSeptember 02, 2009郑州宏大通信有限公司Hand-operated restoring open-circuit protector
    US-5990777-ANovember 23, 1999The Whitaker CorporationShape-memory wire actuated switch
    WO-0199135-A1December 27, 2001Tyco Electronics Amp GmbhCommutateur electrique bistable et relais comportant un tel commutateur

NO-Patent Citations (0)

    Title

Cited By (0)

    Publication numberPublication dateAssigneeTitle