Patent ID: 7637644
Filing Date: 2009-12-29
Classification: B29C,B29L,F21S

Abstract:
1. A vehicle lamp comprising: a housing; and a transparent cover formed of a transparent resin having a flexural modulus of 2000 MPa or more, and joined to the housing by beam welding, wherein the transparent cover has a first surface and a second surface, the second surface faces the housing, and a welding surface is formed along a circumference of the second surface, wherein the welding surface is formed such that the welding surface has a three-dimensional curved surface in a closed-curve form, and such that each continuing surface of the welding surface is formed as a flat surface with respect to a direction of a normal line thereto or as a curved surface having a curvature radius of 30 mm or more with respect to a direction of a normal line thereto, and wherein a circumferential edge of the welding surface is three-dimensionally curved, and at least a portion thereof has a curvature radius substantially less than infinity.