Patent ID: 7677757

Claim:
A lamp holder comprising: a mounting portion; a lamp holding part connected to said mounting portion and including an end arranged to surround a peripheral surface of a lamp, and is capable of being elastically opened and deformed during attaching and detaching of the lamp to the lamp holding part; and a recessed portion positioned at an opposed surface of the lamp holding part that is opposite to said lamp and that is between an end portion and a connecting region connected to said mounting portion; wherein the recessed portion is arranged to allow the lamp holding part to bend so that said end portion displaces in a direction away from the peripheral surface of said lamp; said lamp holding part includes a pair of arm portions extending symmetrically in opposite directions from said mounting portion such that, when the pair of arm portions surround a lamp, the pair of arm portions surround portions of a peripheral surface of the lamp that are directly opposed in a radial direction of the lamp; and the lamp holding part includes a portion at a surface opposite to said recessed portion that bulges in a direction away from said lamp, and said lamp holding part has substantially uniform thickness over substantially an entire length thereof.