一、控制按鈕的作用

按鈕開關通(tong)(tong)常(chang)用(yong)(yong)作短時接(jie)通(tong)(tong)或斷(duan)開(kai)小電(dian)(dian)流控制電(dian)(dian)路(lu)的(de)開(kai)關，用(yong)(yong)于(yu)控制電(dian)(dian)路(lu)中發(fa)出(chu)啟動或停止等指令，通(tong)(tong)過接(jie)觸器(qi)、繼電(dian)(dian)器(qi)等斷(duan)開(kai)主電(dian)(dian)路(lu)。

按鈕開關(guan)是(shi)一種(zhong)結構簡單(dan)，應(ying)用(yong)十(shi)分(fen)廣泛(fan)的(de)主令電器。在電氣(qi)自動(dong)(dong)控(kong)制電路中，用(yong)于手動(dong)(dong)發出(chu)控(kong)制信號以控(kong)制接觸器、繼電器、電磁起動(dong)(dong)器等。

應急(ji)按鈕(niu)開關的(de)作用(yong)：

1、緊急(ji)按鈕開關(guan)是在緊急(ji)情況下，需(xu)要幫助時觸動的(de)開關(guan)。它是用(yong)來控(kong)制2次線路的(de)總開關(guan)。

2、按(an)(an)鈕(niu)(niu)，是一種常用(yong)的(de)(de)控(kong)制電(dian)(dian)器元件，常用(yong)來接(jie)通(tong)或斷開“控(kong)制電(dian)(dian)路”（其(qi)中電(dian)(dian)流很小(xiao)），從而達到控(kong)制電(dian)(dian)動(dong)(dong)機或其(qi)他電(dian)(dian)氣設備運行(xing)目的(de)(de)的(de)(de)一種開關。常見的(de)(de)按(an)(an)鈕(niu)(niu)主要用(yong)作急停按(an)(an)鈕(niu)(niu)，啟動(dong)(dong)按(an)(an)鈕(niu)(niu)，停止按(an)(an)鈕(niu)(niu)，組合(he)按(an)(an)鈕(niu)(niu)（鍵盤），點動(dong)(dong)按(an)(an)鈕(niu)(niu)，復位按(an)(an)鈕(niu)(niu)。

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二、按鈕開關的工作原理

按鈕一般由按鈕帽、復位彈簧、橋式動觸頭、靜觸頭、支柱連桿及外殼等部分組成。按鍵開關的(de)工作原(yuan)理(li)比較好理(li)解，直白點就是這(zhe)樣的(de)：里(li)面有一個(ge)電(dian)磁(ci)鐵的(de)吸附(fu)裝(zhuang)置(zhi)，當你把按鍵按下去之后(hou)，里(li)邊的(de)電(dian)磁(ci)鐵就代電(dian)產生磁(ci)性，然后(hou)通過這(zhe)個(ge)吸附(fu)裝(zhuang)置(zhi)把電(dian)路(lu)接通或者斷開。從而(er)實現了線(xian)路(lu)的(de)遠(yuan)程控(kong)制(zhi)等功(gong)能。

按(an)(an)(an)(an)(an)鍵(jian)(jian)(jian)(jian)不受外力作(zuo)用（即(ji)(ji)靜態）時觸(chu)(chu)(chu)(chu)(chu)頭(tou)(tou)的(de)(de)分合(he)(he)狀態，分為啟動(dong)按(an)(an)(an)(an)(an)鍵(jian)(jian)(jian)(jian)（即(ji)(ji)常(chang)(chang)(chang)開(kai)(kai)(kai)(kai)按(an)(an)(an)(an)(an)鍵(jian)(jian)(jian)(jian)）、停(ting)止按(an)(an)(an)(an)(an)鍵(jian)(jian)(jian)(jian)（即(ji)(ji)常(chang)(chang)(chang)閉(bi)按(an)(an)(an)(an)(an)鍵(jian)(jian)(jian)(jian)）和(he)復(fu)合(he)(he)按(an)(an)(an)(an)(an)鍵(jian)(jian)(jian)(jian)（即(ji)(ji)常(chang)(chang)(chang)開(kai)(kai)(kai)(kai)、常(chang)(chang)(chang)閉(bi)觸(chu)(chu)(chu)(chu)(chu)頭(tou)(tou)組合(he)(he)為一體的(de)(de)按(an)(an)(an)(an)(an)鍵(jian)(jian)(jian)(jian)）。對啟動(dong)按(an)(an)(an)(an)(an)鍵(jian)(jian)(jian)(jian)而言(yan)，按(an)(an)(an)(an)(an)下(xia)按(an)(an)(an)(an)(an)鍵(jian)(jian)(jian)(jian)帽時觸(chu)(chu)(chu)(chu)(chu)頭(tou)(tou)閉(bi)合(he)(he)，松(song)開(kai)(kai)(kai)(kai)后(hou)觸(chu)(chu)(chu)(chu)(chu)頭(tou)(tou)自(zi)動(dong)斷(duan)開(kai)(kai)(kai)(kai)復(fu)位(wei);停(ting)止按(an)(an)(an)(an)(an)鍵(jian)(jian)(jian)(jian)則(ze)相反，按(an)(an)(an)(an)(an)下(xia)按(an)(an)(an)(an)(an)鍵(jian)(jian)(jian)(jian)帽時觸(chu)(chu)(chu)(chu)(chu)頭(tou)(tou)分開(kai)(kai)(kai)(kai)，松(song)開(kai)(kai)(kai)(kai)后(hou)觸(chu)(chu)(chu)(chu)(chu)頭(tou)(tou)自(zi)動(dong)閉(bi)合(he)(he)復(fu)位(wei)。復(fu)合(he)(he)按(an)(an)(an)(an)(an)鍵(jian)(jian)(jian)(jian)是按(an)(an)(an)(an)(an)下(xia)按(an)(an)(an)(an)(an)鍵(jian)(jian)(jian)(jian)帽時，橋式動(dong)觸(chu)(chu)(chu)(chu)(chu)頭(tou)(tou)向下(xia)運動(dong)，使常(chang)(chang)(chang)閉(bi)觸(chu)(chu)(chu)(chu)(chu)頭(tou)(tou)先斷(duan)開(kai)(kai)(kai)(kai)后(hou)，常(chang)(chang)(chang)開(kai)(kai)(kai)(kai)觸(chu)(chu)(chu)(chu)(chu)頭(tou)(tou)才閉(bi)合(he)(he)；當松(song)開(kai)(kai)(kai)(kai)按(an)(an)(an)(an)(an)鍵(jian)(jian)(jian)(jian)帽時，則(ze)常(chang)(chang)(chang)開(kai)(kai)(kai)(kai)常(chang)(chang)(chang)開(kai)(kai)(kai)(kai)觸(chu)(chu)(chu)(chu)(chu)頭(tou)(tou)先分斷(duan)復(fu)位(wei)后(hou)，常(chang)(chang)(chang)開(kai)(kai)(kai)(kai)觸(chu)(chu)(chu)(chu)(chu)頭(tou)(tou)再(zai)閉(bi)合(he)(he)復(fu)位(wei)。