noun
insertion switch
Technical term for a switch that is activated by inserting something, such as a card or plug.
この装置には挿入スイッチが付いていて、カードを差し込むと電源が入る。
This device has an insertion switch; the power turns on when you insert a card.
Compound of 挿入 (そうにゅう, 'insertion') and スイッチ ('switch').