Patent ID: 8827506

Claim:
A luminaire comprising: a luminaire main body that includes an abutment portion in which heat is transferred, and a mounting receiving portion; a socket device that includes a socket main body having an opening portion, an engagement receiving portion which is provided in the opening portion, a mounting member which is fixed to the mounting receiving portion, an elastic member receiving portion which receives an elastic member generating an elastic force between the socket main body and the mounting member, and a connection portion which is electrically connected to an external power source, and is mounted so as to move in an elasticity direction of the elastic member with respect to the luminaire main body by the mounting member; and a lamp device that includes a contact portion which contacts the abutment portion, an engagement portion which engages with the engagement receiving portion, and a lamp side connection portion which is electrically connected to the connection portion, wherein, the mounting member comprises a threaded portion, an intermediate portion and a head portion in which the diameter of the intermediate portion is smaller than that of the head portion and is larger than that of the threaded portion, and the intermediate portion sets the mounting position of the mounting member relative to the luminaire main body, the threaded portion of the mounting member is accommodated in the mounting receiving portion so that the head portion of the mounting member is not protruded from the socket main body, the elastic member generates the elastic force between the socket main body and the head portion of the mounting member, and the abutment portion of the luminaire main body and the contact portion of the lamp device contact each other by the elastic force of the elastic member when the engagement portion of the lamp device and the engagement receiving portion of the socket device are engaged with each other.