1.Main functions：

①control the movement of machinery, such as valve springs in internal combustion engines, control springs in clutches, etc.② Absorb vibration and shock energy, such as buffer springs under automobiles and train carriages, vibration-absorbing springs in couplings, etc.③Store and output energy as power, such as clock springs, springs in firearms, etc.④It is used as a force measuring element, such as a force gauge, a spring in a spring scale, etc.The ratio of load to deformation of a spring is called spring stiffness. The greater the stiffness, the harder the spring.The spring is a kind of elastic element widely used in the machinery and electronics industries. When the spring is loaded, it can produce greater elastic deformation, converting mechanical work or kinetic energy into deformation energy, and after unloading, the deformation of the spring disappears and returns to its original state, converting the deformation energy into mechanical work or kinetic energy.

2.Measurement function

We know that within the elastic limit, the elongation (or contraction) of the spring is proportional to the external force.The nature of the spring is used to make a spring scale.

3.Reset function

The spring is deformed under the action of external force, and after the external force is removed, the spring can return to its state.Many tools and equipment use the nature of springs to reset.For example, the hinges of the doors of many buildings are equipped with return springs. After people enter and exit, the doors will automatically reset.People also use this function to make automatic umbrellas, mechanical pencils and other supplies, which are very convenient.In addition, return springs are indispensable for various buttons and buttons.

4.Drive function

Mechanical clocks and clockwork toys are all driven by a tight clockwork.When the clockwork is tightened, the clockwork bends and deform, storing a certain amount of elastic potential energy.After release, the elastic potential energy is converted into kinetic energy, which is driven by the transmission device to rotate.In toy guns and starting guns and military guns, one of the properties of springs is also used to work.

5.Buffer function

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

6.Sound function

When air flows from the reed holes in the harmonica and accordion, it strikes the reed, and the reed vibrates to make a sound.

7.Compression function

Observing various electrical switches, it will be found that among the two contacts of the switch, one of the heads must be equipped with a spring to ensure that the two heads are in close contact and are well conductive.If the contact is poor, the resistance at the contact becomes larger, the heat generated when the current passes through becomes larger, and in severe cases, the metal at the contact melts.The two metal columns of the bayonet lamp holder are equipped with springs for good contact; as for the central metal sheet of the screw lamp holder and the plug-in metal sheet of all sockets, they are all reeds, and their function is to make the two sides in close contact to maintain the same good condition.In the cassette tape, there is a phosphor bronze reed, which uses the elastic force generated when it is bent and deformed to make the head in close contact with the tape.There is a long coil spring in the stapler. Its role is to tighten the staples on the one hand, and on the other hand, when the front nail is pushed out, the back nail can be sent to the front for the nail to 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. So far.Many machines automatically feed, and the automatic loading of bullets in automatic rifles depends on the function of springs.In addition, clips such as clips for clothes, ballpoint pens, and pen covers all use the compression function of springs to clamp on clothes.