spring-loaded door hinge, also known as a self-closing hinge. This type of hinge is designed to automatically close a door after it has been opened.

The hinge contains a spring mechanism that creates a closing force when the door is opened.

When the door is released, the spring returns to its original position, causing the door to close.

These hinges are commonly used for fire doors, invisible doors, and kitchen doors in restaurants.

Some self-closing hinges have adjustable tension, allowing for customization of the closing force.