Patent ID: 8061872
Filing Date: 2011-11-22
Classification: F16B,F16J,F21V,F21W,F21Y,Y02B

Abstract:
1. An LED lamp comprising: a seat; a lid defining a plurality of first through holes and a plurality of annular flanges, each of the flanges protruding from an edge of the lid defining a corresponding first through hole thereof; a cylindrical transparent envelope arranged between the seat and the lid; a heat sink received in the envelope, the heat sink comprising a bottom end connected to the seat and a top end defining a plurality of screw holes corresponding to the first through holes of the lid; a plurality of LEDs mounted on the heat sink; and a plurality of fastening assemblies extending through the first through holes of the lid and screwing in the screw holes of the top end of the heat sink to secure the lid to the top end of the heat sink, each of the fastening assemblies comprising: a connection shank comprising a pressing part and a pole downwardly extending from the pressing part, the pole extending through a corresponding first through hole of the first through holes of the lid and inserting in a corresponding screw hole of the screw holes of the heat sink; and an elastic waterproof ring received in a corresponding flange of the flanges of the lid, the elastic waterproof ring comprising an annular body defining a through hole communicating with a corresponding first through hole and a plurality of protrusions protruding from a top surface of the body; wherein when the lid is secured to the top end of the heat sink, the pressing part of the connection shank presses the protrusions of the elastic waterproof ring to enable elastic waterproof ring to deform outwardly and inwardly simultaneously, the flange of the lid resists the outward deformation of the elastic waterproof ring, meanwhile the body of the elastic waterproof ring inwardly engages the pole of the connection shank.