一、控制按鈕的作用
按鈕開關通常用(yong)作短時接通或斷(duan)(duan)開(kai)小電(dian)流控制電(dian)路(lu)的開(kai)關,用(yong)于控制電(dian)路(lu)中發出啟(qi)動或停止(zhi)等指令,通過(guo)接觸器、繼電(dian)器等斷(duan)(duan)開(kai)主電(dian)路(lu)。
按(an)鈕開關是一(yi)種結構(gou)簡單,應(ying)用十分(fen)廣泛的主(zhu)令(ling)電(dian)(dian)(dian)器。在電(dian)(dian)(dian)氣自動控(kong)制(zhi)電(dian)(dian)(dian)路(lu)中,用于手動發出控(kong)制(zhi)信號以(yi)控(kong)制(zhi)接觸器、繼電(dian)(dian)(dian)器、電(dian)(dian)(dian)磁起動器等。
應(ying)急(ji)按鈕開(kai)關的作用(yong):
1、緊急(ji)按鈕開(kai)關是在緊急(ji)情況下,需要幫助時觸動的(de)開(kai)關。它是用(yong)來控(kong)制2次線路(lu)的(de)總開(kai)關。
2、按(an)(an)(an)鈕(niu),是(shi)一種常(chang)用的控制(zhi)電器元件,常(chang)用來接通(tong)或斷開“控制(zhi)電路”(其中電流很小(xiao)),從(cong)而(er)達(da)到控制(zhi)電動(dong)(dong)機(ji)或其他電氣(qi)設備運行(xing)目的的一種開關。常(chang)見的按(an)(an)(an)鈕(niu)主(zhu)要用作急停按(an)(an)(an)鈕(niu),啟動(dong)(dong)按(an)(an)(an)鈕(niu),停止按(an)(an)(an)鈕(niu),組合按(an)(an)(an)鈕(niu)(鍵盤),點動(dong)(dong)按(an)(an)(an)鈕(niu),復位按(an)(an)(an)鈕(niu)。
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)(de)工作(zuo)原理比較好(hao)理解,直白點就是這樣的(de)(de):里(li)面有一個電磁(ci)鐵的(de)(de)吸附裝置(zhi)(zhi),當你把按鍵按下去(qu)之后(hou),里(li)邊的(de)(de)電磁(ci)鐵就代電產生磁(ci)性,然(ran)后(hou)通過這個吸附裝置(zhi)(zhi)把電路接通或者斷開(kai)。從而實現了(le)線路的(de)(de)遠程控制等功能。
按(an)(an)(an)鍵(jian)(jian)(jian)(jian)不(bu)受(shou)外力作用(yong)(即(ji)靜態)時觸(chu)頭的分合(he)(he)狀(zhuang)態,分為啟動按(an)(an)(an)鍵(jian)(jian)(jian)(jian)(即(ji)常(chang)(chang)開(kai)按(an)(an)(an)鍵(jian)(jian)(jian)(jian))、停止按(an)(an)(an)鍵(jian)(jian)(jian)(jian)(即(ji)常(chang)(chang)閉(bi)按(an)(an)(an)鍵(jian)(jian)(jian)(jian))和復(fu)(fu)合(he)(he)按(an)(an)(an)鍵(jian)(jian)(jian)(jian)(即(ji)常(chang)(chang)開(kai)、常(chang)(chang)閉(bi)觸(chu)頭組合(he)(he)為一(yi)體的按(an)(an)(an)鍵(jian)(jian)(jian)(jian))。對啟動按(an)(an)(an)鍵(jian)(jian)(jian)(jian)而言,按(an)(an)(an)下(xia)按(an)(an)(an)鍵(jian)(jian)(jian)(jian)帽時觸(chu)頭閉(bi)合(he)(he),松開(kai)后觸(chu)頭自動斷(duan)開(kai)復(fu)(fu)位(wei);停止按(an)(an)(an)鍵(jian)(jian)(jian)(jian)則相反,按(an)(an)(an)下(xia)按(an)(an)(an)鍵(jian)(jian)(jian)(jian)帽時觸(chu)頭分開(kai),松開(kai)后觸(chu)頭自動閉(bi)合(he)(he)復(fu)(fu)位(wei)。復(fu)(fu)合(he)(he)按(an)(an)(an)鍵(jian)(jian)(jian)(jian)是(shi)按(an)(an)(an)下(xia)按(an)(an)(an)鍵(jian)(jian)(jian)(jian)帽時,橋式動觸(chu)頭向下(xia)運動,使常(chang)(chang)閉(bi)觸(chu)頭先(xian)斷(duan)開(kai)后,常(chang)(chang)開(kai)觸(chu)頭才閉(bi)合(he)(he);當松開(kai)按(an)(an)(an)鍵(jian)(jian)(jian)(jian)帽時,則常(chang)(chang)開(kai)常(chang)(chang)開(kai)觸(chu)頭先(xian)分斷(duan)復(fu)(fu)位(wei)后,常(chang)(chang)開(kai)觸(chu)頭再閉(bi)合(he)(he)復(fu)(fu)位(wei)。