What is the name of the device that closes the door by its own weight? Those doors that are usually used in hotel bathrooms.

Hello, this is a cleverly designed hinge. When you open the door leaf, the whole door leaf rises to a certain extent, which is equivalent to an increase in potential energy. As soon as you let go, it will naturally tend to fall, so it is closed. We come from Yongkang, Zhejiang, the capital of hardware. We can provide this kind of hinge. Please contact us if necessary.