| 摘要 |
A bicycle lock for blocking a rotation of the crankshaft ( 5 ) of a bicycle is provided at the bottom in a saddle tube ( 6 ) of the bicycle close to the crankshaft. The bicycle lock comprises a lock housing ( 1 ) accommodating a locking pin ( 2 ) and a locking mechanism. The locking mechanism is adapted to fix the locking pin in two positions, wherein it releases or blocks the crankshaft. The bicycle lock is provided with coupling means ( 12 ) which are adapted to interact with counter-coupling means being part of the saddle tube in order to have a detachable coupling between the lock housing and the saddle tube. The lock housing ( 1 ) is coupled to the saddle tube ( 6 ) by a rotating coupling ( 12 ). The locking pin in the lower position thereof blocks the rotation of the coupling between the block housing and the saddle tube.
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