是一(yi)種施(shi)壓促動(dong)的快速(su)開關，又叫靈敏(min)開關。

其工作(zuo)原理(li)是：外機械力(li)(li)(li)(li)通(tong)(tong)過(guo)傳動(dong)(dong)(dong)元件(jian)（按(an)(an)銷、按(an)(an)鈕(niu)、杠桿(gan)、滾輪(lun)等(deng)）將力(li)(li)(li)(li)作(zuo)用(yong)(yong)于動(dong)(dong)(dong)作(zuo)簧(huang)片(pian)上(shang)，并將能量積聚到臨界(jie)點后，產生(sheng)(sheng)瞬時動(dong)(dong)(dong)作(zuo)，使(shi)動(dong)(dong)(dong)作(zuo)簧(huang)片(pian)末(mo)端(duan)的(de)動(dong)(dong)(dong)觸(chu)(chu)點與定觸(chu)(chu)點快速接通(tong)(tong)或(huo)斷(duan)(duan)開。當傳動(dong)(dong)(dong)元件(jian)上(shang)的(de)作(zuo)用(yong)(yong)力(li)(li)(li)(li)移去后，動(dong)(dong)(dong)作(zuo)簧(huang)片(pian)產生(sheng)(sheng)反(fan)向動(dong)(dong)(dong)作(zuo)力(li)(li)(li)(li)，當傳動(dong)(dong)(dong)元件(jian)反(fan)向行(xing)程達到簧(huang)片(pian)的(de)動(dong)(dong)(dong)作(zuo)臨界(jie)點后，瞬時完(wan)成反(fan)向動(dong)(dong)(dong)作(zuo)。微動(dong)(dong)(dong)開關的(de)觸(chu)(chu)點間距小、動(dong)(dong)(dong)作(zuo)行(xing)程短(duan)、按(an)(an)動(dong)(dong)(dong)力(li)(li)(li)(li)小、通(tong)(tong)斷(duan)(duan)迅速。其動(dong)(dong)(dong)觸(chu)(chu)點的(de)動(dong)(dong)(dong)作(zuo)速度(du)與傳動(dong)(dong)(dong)元件(jian)動(dong)(dong)(dong)作(zuo)速度(du)無(wu)關。微動(dong)(dong)(dong)開關以(yi)按(an)(an)銷式(shi)(shi)為基(ji)本(ben)型(xing)，可派(pai)生(sheng)(sheng)按(an)(an)鈕(niu)短(duan)行(xing)程式(shi)(shi)、按(an)(an)鈕(niu)大(da)行(xing)程式(shi)(shi)、按(an)(an)鈕(niu)特大(da)行(xing)程式(shi)(shi)、滾輪(lun)按(an)(an)鈕(niu)式(shi)(shi)、簧(huang)片(pian)滾輪(lun)式(shi)(shi)、杠桿(gan)滾輪(lun)式(shi)(shi)、短(duan)動(dong)(dong)(dong)臂式(shi)(shi)、長動(dong)(dong)(dong)臂式(shi)(shi)等(deng)等(deng)。 微動(dong)(dong)(dong)開關在電(dian)(dian)子設(she)備及其他設(she)備中(zhong)(zhong)用(yong)(yong)于需頻繁換接電(dian)(dian)路(lu)的(de)自動(dong)(dong)(dong)控制及安全保護等(deng)裝置中(zhong)(zhong)。微動(dong)(dong)(dong)開關分為大(da)型(xing)、中(zhong)(zhong)型(xing)、小型(xing)，按(an)(an)不同的(de)需要分有(you)可以(yi)有(you)防水型(xing)（放在液體環境中(zhong)(zhong)使(shi)用(yong)(yong)）和普通(tong)(tong)型(xing)，開關連(lian)接兩個線路(lu)，為電(dian)(dian)器、機器等(deng)提供通(tong)(tong)斷(duan)(duan)電(dian)(dian)控制，廣泛(fan)應用(yong)(yong)在鼠標，家用(yong)(yong)電(dian)(dian)器，工業機械，摩托車等(deng)地方，開關雖(sui)小，但起著不可替代的(de)作(zuo)用(yong)(yong)。

有的也稱！

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