Patent ID: 8540396

Claim:
A lighting system comprising: a socket device including a socket device body defining an insertion hole, the socket device body including a first wall and a second wall, wherein both the first and second walls are disposed around the insertion hole and wherein the first wall surrounds the second wall; and a lamp device configured to be attached to the socket device via insertion into the insertion hole, wherein the socket device body further comprises: an elastic body being configured to press the lamp device, when attached to the socket device, in a direction of insertion through the insertion hole, wherein the elastic body is disposed exterior to the second wall and interior to the first wall in a direction orthogonal to the insertion direction; and a power supply portion disposed exterior to at least the second wall in the direction orthogonal to the insertion direction, wherein one of the socket device body and the lamp device includes a projection portion and another one of the socket device body and the lamp device includes a groove portion configured to receive the projection portion, and wherein the groove portion includes an introduction portion configured to receive initial insertion of the projection portion into the groove portion and an inclined portion configured to guide the projection portion to an engaged position with the groove portion.