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 generated increases, and in severe cases, the metal at the contact will melt. 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 the tape, there is a phosphor bronze reed, using the elastic force generated when it is bent and deformed to make 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 to prepare the staples to be pushed out comfortably. In this way, the nails can be pushed to the front automatically one by one until the nails are all pushed out. Many machines automatically feed materials. In addition, the clips on clothes, ballpoint pens, and pen holders all use the spring compression function Clipped to clothes.
The hardware spring is deformed under the action of external force. After the external force is removed, the spring can be restored. Many tools and equipment use the nature of spring to reset. For example, many building door hinges are equipped with return springs. After entering and exiting, the door will automatically reset. People also use this function to make automatic umbrellas, mechanical pencils and other supplies, which is very convenient.
In addition, various buttons and buttons are also indispensable to reset springs. Mechanical clocks, clockwork toys are all on top The mainspring is driven. When the mainspring is tightened, 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 the transmission device to rotate.
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 converted into kinetic energy, which is driven to rotate by a transmission device.
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.
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.
We know that within the elastic limit, the extension (or contraction) of the hardware spring is proportional to the external force. The spring scale is made by using the nature of the spring.