Patent ID: 7293894

Claim:
A flashlight comprising: a barrel having an open end and an annular wall, said annular wall having an annular outer surface, and an annular inner surface formed with a positioning groove that extends from said open end in an axial direction of said barrel, said annular wall being formed with a through hole extending from said annular outer surface to said annular inner surface; a coupling ring mounted fixedly on said annular inner surface of said annular wall of said barrel; and a switch device including a switch housing disposed in said barrel and having an open end that abuts against said coupling ring, said switch housing further having an outer circumferential surface formed with a receiving groove corresponding to said through hole in said annular wall of said barrel, and an engaging groove corresponding to said positioning groove in said inner surface of said annular wall of said barrel, said receiving groove being defined by a groove bottom wall and opposite lateral walls, said groove bottom wall being formed with an opening aligned with said through hole in said annular wall of said barrel, said engaging groove having a depth that gradually increases toward said open end of said barrel, a switch unit housed in said switch housing and including an operating member that extends outwardly of said barrel through said opening in said switch housing and said through hole in said annular wall of said barrel, and a wedge member engaging movably said positioning groove in said inner surface of said annular wall of said barrel and said engaging groove in said outer circumferential surface of said switch housing, and having a thickness that gradually increases toward said open end of said barrel, said wedge member being sandwiched between said barrel and said switch housing so as to prevent movement of said switch housing in said barrel.