Key pullout reminding device
A reminding device and key technology, applied in windows/doors, building components, special equipment for doors/windows, etc., can solve the problem of not remembering, and achieve the effects of reasonable structure, good market prospects, and easy realization.
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[0016] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
[0017] The structure of the present invention is as figure 1 As shown, it includes a time relay, a power supply, a sounding device 3, a warning light 9, a lock cylinder push rod 2 and a travel switch 1 located at the front end of the anti-theft door lock hole; the time relay adopts an energization delay type time relay; the time The relay has a first normally open contact and a second normally open contact; the coil of the time relay is connected to the power supply through the travel switch 1; the sounding device 2 is connected to the power supply through the first normally open contact of the time relay ; The warning light 3 is connected to the power supply through the second normally open contact of the time relay.
[0018] The outside of the anti-theft door is also provided with a switch 7, and the sounding device 2 is connected to the power s...
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