| 摘要 |
PURPOSE: An anti-theft device for a bicycle is provided to prevent the stealing of a bicycle by preventing the rotation of wheel and the separation of saddle or wheel. CONSTITUTION: An anti-theft device for a bicycle comprises a rotary shaft(10), a screwnut(20), and a lock(40). The rotary shaft is installed in wheel hub or frame. The rotary shaft has one or more locking grooves(14). A nut is thread-combined to one end of the rotary shaft. The lock is combined with the rotary shaft at outside. The lock is detachably inserted to the locking groove using a key in order to control lock and unlock state of the lock. |
