| 摘要 |
A bicycle anti-theft device is made out of the saddle post by substituting to the regular hollow tube two massive half-cylinder arms grooved on their flat sides. The master arm is molded in one single piece with the head-like saddle holder, and the secondary one is terminated at its lower end with a full cylinder ring which houses a tubular cam round key lock. These two arms are couple together on their flat side to reproduce the standard saddle post diameter and house in their inner face to face grooves an extra bar that pivots around the master arm lower end. The constituting parts of the saddle post can be reassembled and locked in a closed circuit that can be used to secure the bicycle (with the two wheels, the saddle and its post) to a metal fence or to a post. To do so, the secondary arm is hooked to the back of the saddle holder, and then the free end of the pivoting bar is introduced and locked between a buffer and a tubular cam lock mechanism in the secondary arm ring end.
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