Patent ID: 7380972
Filing Date: 2008-06-03
Classification: G02B,G02F

Abstract:
1. A lighting apparatus, comprising: an optical member; and a plurality of locking portions, wherein, a light emitting plane of the optical member is parallel to a vertical direction and at least one opening is provided in each of four regions of the optical member that are demarcated by a line parallel to the vertical direction that passes through the center of gravity of the light emitting plane of the optical member and a line parallel to a horizontal direction that passes through the center of gravity, in each of the four regions, a locking portion penetrates a corresponding opening, regardless of which two adjacent regions of the four regions are positioned vertically above with respect to the center of gravity when the lighting apparatus is set, the optical member is suspended by the locking portion penetrating the corresponding opening in a vertically upper and horizontally left region with respect to the center of gravity, and by the locking portion penetrating the corresponding opening in a vertically upper and horizontally right region with respect to the center of gravity, as an upper peripheral portion of each locking portion abuts on an upper-edge portion of the corresponding opening, and in a vertically lower side with respect to the center of gravity of the optical member, each of the locking portions penetrates the corresponding opening such that the optical member is not subjected to the stress caused by its own weight in the vertically upward direction, nor is it subjected to the stress caused by its contact in the vertically downward direction with the locking portion.