Patent ID: 7990062

Claim:
An LED lamp, comprising: a heat dissipation part comprising a heat dissipation member; an optical part comprising an LED module and an envelope, the LED module being thermally attached to the heat dissipation member, the envelope being mounted on the heat dissipation member and covering the LED module; and an electric part arranged at bottom ends of the heat dissipation part and the optical part, the electric part comprising: a casing comprising a bottom plate and an annular sidewall extending from a periphery of the bottom plate to connect with the heat dissipation part and the optical part; a circuit board received in the casing and electrically connected to the LED module, and a lamp cap located at an outer side of the bottom plate of the casing, the lamp cap comprising an electric shell and an electric pole axially inserted in the electric shell, an inner end of the electric shell adjacent to the casing extending through a through hole defined in the bottom plate of the casing to rotatablely connect the lamp cap with the casing, an outer end of the electric pole far from the casing extending through the electric shell, the outer end of the electric pole being fixedly connected to and electrically insulated from the electric shell, an orientation-adjusting structure being provided between the casing and the lamp cap for adjusting the illumination direction of the LED lamp, by the orientation-adjusting structure when the lamp cap is screwed into a lamp holder to electrically connect therewith, the casing being rotated with the lamp cap till reaching a first position in which the lamp cap is electrically connected with the lamp holder and the lamp cap and the casing both are stopped from further rotation in the screwing-in direction, and the casing is rotatable in a reverse direction till reaching a second position during which the lamp cap is kept as stationary and in electrical connection with the lamp holder, from the second position, a further rotation of the casing in the reverse direction causing the lamp cap to rotate in the reverse direction and to lose its electrical connection with the lamp holder.