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Spring buckle, also known as snap fastener or press stud, is a commonly used fastening device in clothing, bags, and other textile products. The principle of spring buckle is based on the elasticity of the spring and the snap action of the button.
The structure of a spring buckle typically consists of four parts: a socket, a stud, a spring, and a holding disc. The socket and stud are the two pieces that are fastened together, while the spring and holding disc are the components that provide the snap action.
The socket is usually attached to one piece of fabric and has a small hole in the center. The stud is attached to the other piece of fabric and has a protruding knob that fits snugly into the hole of the socket. The spring is located between the socket and the holding disc, and is designed to compress and then release, creating the snap action that fastens the socket and stud together.
The holding disc is usually made of metal or plastic, and is designed to keep the spring in place. When the socket and stud are fastened together, the holding disc keeps the spring compressed, allowing the socket and stud to remain securely fastened.
In summary, the spring buckle works by utilizing the elasticity of the spring and the snap action of the button to fasten two pieces of fabric together. The socket and stud are the pieces that are fastened, while the spring and holding disc provide the snap action and keep the fastening secure.