Patent ID: 8662725

Claim:
An actuator configured to adjust an irradiating direction of light from a light source of a lamp unit which is disposed in an interior of a lamp casing made up of a lamp housing which is opened in one direction and a cover which closes the opening of the lamp housing, the actuator comprising: a case member including a mounting shaft, a unidirectional adjusting device removably provided in the case member, the unidirectional adjusting device adjusting the irradiating direction only in a vertical direction by tilting the lamp unit in the vertical direction, wherein the unidirectional adjusting device includes an outputting connection member which is connected to the lamp unit and which is mounted on the mounting shaft of the case member, and wherein the output connection member includes a base portion and a connecting shaft portion, the base portion including a restricting portion that restricts a horizontal rotation of the outputting connection member relative to the lamp housing.