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Metal springs are also known as metal springs. It is a mechanical part that uses elasticity to work. And have a variety of features

Pressing function
Observing a variety of electrical switches will find that one of the two contacts of the switch must be spring loaded to ensure that the two heads are in close contact with each other. If the contact is poor, the resistance at the contact increases, and the heat generated when the current passes through will increase, and in severe cases, the metal at the contact will melt. The two metal posts on the bayonet lamp holders are also fitted with springs for good contact; as for the central sheet metal of the screw base and the plug metal sheet of all the sockets are reeds, its function is to keep the two sides in close contact to maintain the Same as good. When there is a phosphor-bronze reed in the tape, the head is brought into close contact with the magnetic tape by the elastic force generated when it is bent. There is a long spiral spring in the stapler. Its role is to tighten the staples on the one hand, and on the other hand, when the frontmost nail is pushed out, the back nail can be sent to the forefront to prepare the nail for comfortable launch. In this way, one nail can be automatically pushed to the front until all the nails are pushed out. Many machines automatically feed materials. In addition, clips such as clips, ballpoint pens, and clips on pen holders are clamped to clothing using a spring-loaded compression feature.
Drive function
Mechanical clocks and clockwork toys are all driven by tight springs. When the spring is tightened, the spring produces a bending deformation and stores a certain amount of elastic potential energy. After release, the elastic potential energy is converted into kinetic energy and driven by the transmission.
Reset function
The spring deforms under the action of external force. After the external force is removed, the spring can return to the state. Many tools and equipment are reset using springs. For example, the reset springs are installed on the hinges of many building doors, and the doors are automatically reset after people enter and exit. People have also used this function to make automatic umbrellas, mechanical pencils and other supplies, which are very convenient. In addition, a variety of buttons and buttons are also missing the return spring.
Buffer function
A spring is mounted between the frame of the locomotive car and the wheels, and the spring's elasticity is utilized to reduce the jolt of the vehicle.
Measurement function
We know that within the elastic limit, the spring's elongation (or contraction) is proportional to the external force. The spring balance is made using springs.
Vibration sound function
When the air flows from the spring hole in the harmonica and the accordion, the reeds and the reeds vibrate to make a sound.