Theft alarm protection device for e.g. bicycle, has audio signal transmitter emitting audio alarm upon receiving radio signal from transmitter, where secondary lock installed at bicycle or motorcycle is locked upon detecting radio signal

摘要

The device has a lock (1) equipped with a transmitter (2) for transmitting a radio signal to a radio signal receiver (4) fitted on a frame of a bicycle or a motorcycle when the lock is damaged or broken. An audio signal transmitter (6) emits an audio alarm upon receiving the radio signal from the transmitter, and a secondary lock (7) installed at the bicycle or motorcycle is locked upon detecting the radio signal.