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Anonymous users2024-01-24Like the clockwork reeds of an alarm clock, the door is closed by gears or rack transmission. When the door is manually lifted, it is wound up, and when the door is released, the spring is closed in reverse. Maybe there's a better way now, people are too smart.
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Anonymous users2024-01-23If it is a swing door, install a door closer.
If it is a smooth door, if it is not connected to electricity, you can use its own weight to close the automatic door (that is, the door is installed slightly obliquely to ensure the appearance, and the door can be closed by itself with its own weight). If it is connected to electricity, then install an automatic sliding door.
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Anonymous users2024-01-22A door closer was added.
Accompanied by it, right? Such a small problem.
Generally, infrared sensors are used, but there are also sensors such as sound and lasers.
The smart light in the toilet can't be turned off because there is a problem with the signaler that receives the signal on the smart board.
There are more waterproof composite panels. But it's better to send a picture to see it.
Hello, if you are talking about the type used in hotels or airports, then which is infrared technology, which uses infrared to sense the temperature of the human body, and the temperature will disappear when people leave, and then the drainage function is activated. This technology requires the cooperation of a PLC, and there are other ways to achieve this.