Patent ID: 8007142

Claim:
A fastening device adapted for connecting a lamp head to a lamp rod of a lamp comprising: a tube-shaped lamp seat adapted for extending from the lamp head; a tightening device disposed in the lamp seat and comprising an inner face and an outer face opposite to the inner face, the inner face of the tightening device and an inner face of the lamp seat cooperatively defining a sandwiching room adapted for receiving an end of the lamp rod; a connecting device movably connecting the tightening device to the lamp seat; and a locking device movably mounted to the lamp seat for abutting against the outer face of the tightening device; wherein the tightening device and the connecting device are moveable along a radial direction of the lamp seat to cause the tightening device to move toward the sandwiching room, and the locking device is also moveable along the radial direction for exerting a force on the outer face of the tightening device to cause the tightening device to move toward the sandwiching room along the radial direction of the lamp seat.