| 摘要 |
Burglary alarm for a bicycle, mounted inside the bicycle frame and comprising a ratchet wheel (10) milled out in the bicycle's crank (12) as well as a ratchet pawl (9), which by means of a sliding bolt (3) can be put in or out of engagement with the ratchet wheel (10). The sliding bolt (3) is operated by a rack (7), which can be moved by a toothed wheel (8) worked by means of a lock mechanism (4). |
