Patent ID: 7115826

Claim:
A switch device comprising: a first case member provided with fixed contacts electrically connected to an external device; a second case member which is attached to the first case member and has a tubular part with opened ends; movable segments each of which is movably contained in a space formed by the first case member and the second case member and has contacts being brought into contact with the fixed contacts by moving; and segment operating member that is rotatably attached to the tubular part in a state of being inserted in the tubular part of the second case member and rotates such that the movable segments are selectively electrically connected to or isolated from the fixed contacts, wherein the tubular part has a pair of first walls that are opposite to each other and pivotably support the segment operating member and a pair of second walls that are connected to the first walls and are opposite to each other, a position of a rotation center of the segment operating member is higher than upper ends of the second walls, and the segment operating member has protruding parts that extend toward the second walls and has a substantially circular arc shape with the rotation center as the center.