keyswitch
n. 键形开关；按键开关
例句
A breech-sight tie-in of the golf club comprises a keyswitch and a laser emitter with the breech-sight is located on a box.
高尔夫推杆上的瞄准器接头，瞄准器置于一盒体上，有一按键开关和一激光发射器。
