鍵(jian)(jian)盤(pan)是(shi)日常生活中(zhong)最(zui)常用也是(shi)最(zui)主(zhu)要的輸(shu)入(ru)設備。通(tong)過鍵(jian)(jian)盤(pan)，將各種各樣的信息傳輸(shu)進計算(suan)機當(dang)中(zhong)，從而對計算(suan)機輸(shu)入(ru)數(shu)據或是(shi)發出命令(ling)等。其實，鍵(jian)(jian)盤(pan)原理就是(shi)由一組按陣列方式裝配在(zai)一起的按鍵(jian)(jian)開關(guan)組成，每當(dang)按下一個鍵(jian)(jian)就相(xiang)(xiang)當(dang)于接通(tong)相(xiang)(xiang)應的開關(guan)電路。