| 摘要 |
<p>The invention concerns a device signalling the fall of a person into a water expanse comprising a sealed hollow floatable housing (1), wherein is provided a motion sensor (2) adapted to produce a trigger signal when a movement is detected and an alarm signal transmitter (6) associated with the motion sensor (2) and capable of receiving from the latter the trigger signal and transmitting the alarm signal in response. The motion sensor (2) comprises a balance weight (2a) arranged elastically suspended in a tubular guide (2b) fixed to the housing (1), said balance weight (2a) mobile in said tubular guide (2b), in the lower part, being provided with at least a switch element (3) designed to be urged in contact with the balance weight (2a) by an ascending movement of the housing (1) and deliver through said contact the trigger signal.</p> |
