Abstract: A micro switch includes a housing, which has bottom terminal slots and an inside locating hole, a side cover hooked on the housing and covering a side opening of the housing, and a common terminal and a normal-open terminal respectively mounted in the bottom terminal slots, the common terminal and the normal-open terminal each having a first end extending out of the housing and a second end extending through the locating hole inside the housing.

Abstract: A keystroke structure (1) comprising a baseplate with insert holes are considerably spaced; the baseplate further comprises a membrane circuit board; an electrically conductive and round in shape resilient body is on the circuit board, a first key frame and a second key frame are on the rim of the resilient body; the first key frame and the second key frame comprise two protruding hinged arms at one end and two extending posts at the other end; the posts comprise a shaft lever respectively; the shaft levers can thread insert the holes on the hood frame; furthermore, the posts comprise a protruding tubes each where they are connected with the first key frame and the second key frame; the tubes comprise a through holes each which the hinged arms thread such that the first key frame and the second key frame can be connected in “Y” shape.