Safety device
A technology of safety device and elastic device, applied in transportation and packaging, door/window fittings, construction, etc., can solve the problems of difficult two door panels, reduce the size of door openings, etc., achieve easy damage, reduce injury accidents, The effect of good performance
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[0031] This finger guard sensor has 4 parts, including an infrared sensor, which includes a pair of transmitter 1 and receiver 3 . The infrared sensor is accommodated in the rubber tube 2 . A rubber tube 2 of a specific length is inserted into an aluminum open tube 4 for maintaining straightness and for fixing the whole assembly in the door frame.
[0032] The sensor works as an electronic non-contact switch. At one end, an infrared transmitter inside the rubber tube continuously emits an infrared-coded signal, and a receiver at the other end receives the signal and measures the time difference between signal transmissions to check the continuity of the connection.
[0033] The rubber tube serves as the channel for the transmission, and if the channel is blocked or obstructed to a certain degree by foreign objects, the transmission will not be successful. If the receiver cannot receive a complete segment within a specified period of time, the transmission is considered incom...
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