The push button switch has the advantages of small contact resistance, precise operation force error, diversified specifications, etc., and is widely used in electronic equipment and white goods, such as: audio and video products, digital products, remote controls, communication products, household appliances. , security products, toys, computer products, fitness equipment, medical equipment, counterfeit pens, laser pointers and so on. Because of the environmental conditions of the push switch (less than 2 times the elastic / ambient temperature and humidity conditions and electrical performance), large equipment and high-load buttons are replaced by conductive rubber or pot switch hardware shrapnel, such as medical equipment, television Machine remote control, etc.

Regarding the pin position problem of the five-pin button switch: two pins are one set. When the switch body is properly pressed, the four pins are turned on, and the fifth pin is grounded. The button switch is a fourth-generation switch product developed with the development of electronic technology. The earliest volume is 12mm*12mm, 8mm*8mm, and now it is 6mm*6mm. The product structure has three types: vertical, horizontal and horizontal with ground end. Now there are two types of combined (3M, 4M, SM, 6M, SM) and potentiometer button switches to meet the requirements of various domestic electronic products. The mounting dimensions are 6.5mm*4.5mm, 5.5mm*4mm and 6mm*4mm. There are 4.5mm*4.5mm small button switches and chip button switches in foreign countries. The chip button switches are suitable for surface assembly.

Now there is the fifth generation switch-membrane switch, the function is the same as the key switch, mainly used for electronic instruments and CNC machine tools, but the resistance is large and the hand feel is poor. In order to overcome the phenomenon of poor hand feeling, there is also a silver layer in the membrane switch as a contact point, but a contact reed

The key switches are divided into two categories: the metal spring is used as the key switch of the switch contact piece, the contact resistance is small, the hand feel is good, and there is a "tick" crisp sound. A switch that uses conductive rubber as a contact path is known as a conductive rubber switch. The switch feels good, but the contact resistance is large, generally 100 to 300n. The structure of the push button switch is to move downward by the button, so that the contact spring or the conductive rubber block contacts the soldering piece to form a passage.

The operating force of the push button switch is related to the state in which the reed is located. The starting force is proportional to the compression distance of the reed. When the reed is compressed to 5% to 70%, the operating force is suddenly reduced, accompanied by a "tick" sound. The guide rubber switch generally has two structures. The operating force curve varies greatly depending on the geometry of the rubber block.