Patent ID: 7987959

Claim:
An actuator for a state changeover element whose state changes over by being rectilinearly pushed or pulled in cooperation with tilting of a tilt member, comprising: a rotational power generating portion; an output shaft, that is disposed coaxial with and integrally rotatably coupled to a tilt spindle of the tilt member, through which rotational power generated by the rotational power generating portion is output; a casing that covers the actuator and includes an opening through which one axial end of the output shaft is exposed; and a rotational angle limiting unit, provided radially between the output shaft and a wall portion of the casing, that faces the output shaft and physically limits a rotational angle of the output shaft, wherein the rotational angle limiting unit includes a protrusion, provided on the output shaft, that radially protrudes toward a wall portion of the casing, and stoppers provided on the wall portion of the casing, that abut against the protrusion as the output shaft rotates, the wall portion of the casing is a tubular boss portion through which the output shaft is disposed, the stoppers provided on the tubular boss portion, and the stoppers are wall surfaces located at each side, in a circumferential direction, of an axial recess provided within a predetermined angular range in the circumferential direction in the tubular boss portion.