# Introduction to the six functions of springs

Talking about the six functions of springs:

A. Measurement function

We know that within the elastic limit, the extension (or contraction) of the spring is proportional to the external force. The spring balance is made by using the nature of the spring.

B. Buffer function

A spring is installed between the frame of the locomotive and the wheel, and the elasticity of the spring is used to slow down the bumps of the vehicle.

C. Squeeze function

Observing various electrical switches, you will find that one of the two contacts of the switch must be equipped with a spring to ensure that the two contacts are in close contact and are in good conduction. If the contact is poor, the resistance at the contact becomes larger and the current passes When the heat is increased, the metal at the contact will melt in severe cases. The two metal posts of the bayonet base are equipped with springs for good contact; as for the central metal piece of the screw base and the plug-in metal of all sockets The blades are all reeds, and their function is to make the two sides in close contact to maintain the same good. When there is a reed of phosphor bronze in the tape, the elastic force generated when it is bent and deformed makes the head and the tape close contact. There is a long coil spring in the stapler. On the one hand, it is used to tighten the staples. On the other hand, when the front staple is pushed out, the back staples can be sent to the front so that the staples can be pushed out comfortably. In this way, the nails can be automatically pushed to the front one by one until all the nails are pushed out. Many machines automatically feed, and the bullets in automatic rifles are automatically loaded by springs. In addition, like the clothes clip, The clip on the ballpoint pen and the pen case is clamped on the clothes by the pressing function of the spring.

D. Drive function

Mechanical clocks and clockwork toys are driven by winding up the mainspring. When the mainspring is wound up, the mainspring bends and deforms and stores a certain amount of elastic potential energy. After release, the elastic potential energy is transformed into kinetic energy, which is driven by a transmission device to rotate. Toy guns, starting guns, and military guns also work with springs.

E. Reset function

The spring deforms under the action of an external force. After the external force is removed, the spring can be restored to its state. Many tools and equipment use the nature of the spring to reset. For example, many building door hinges are equipped with return springs. People go in and out After that, the door will automatically reset. People also use this function to make automatic umbrellas, automatic pencils and other supplies, which is very convenient. In addition, various buttons and keys are also indispensable for reset springs.

F. Vibration and sound function

When air flows from the reed hole in the harmonica or accordion, it impacts the reed and the reed vibrates to make a sound.