There are two groups of switches on the four pins. If you press down, the two groups will be powered on at the same time. If you release it, the two groups will be opened at the same time. For the four pins (the metal pieces of the pins in the figure are swinging horizontally), 12 is connected, and 34 is also connected. 1-3, 2-4 can be used.
Working principle of four foot touch switch
In fact, the working principle of the four foot light touch switch is not much different from that of the ordinary button switch. It is composed of normally open contact and normally closed contact. In the four foot light touch switch, the function of the normally open contact is that when the pressure is applied to the normally open contact, the circuit will be in a connected state; when the pressure is removed, the original normally closed contact will be restored So called disconnection. This pressure force is to use our hands to open and close buttons. All in all, the working principle of the four foot tap switch is well understood.
Four foot touch switch precautions
1. If the load is applied to the terminal of the four pin light touch switch, there will be looseness, deformation and deterioration of electrical characteristics due to different products and different immersion welding conditions. Please pay attention to it when using.
2. When welding twice, please do it after the first welding part is restored to normal temperature. Continuous heating may cause deformation of the peripheral part, looseness and falling off of the terminals and decrease of the electrical characteristics.
3. The four pin light touch switch is designed and manufactured on the premise of DC resistance load. When using other loads [inductive load, capacitive load], please confirm separately.
4. When four feet touch the switch, if the specified load is applied, the switch may be damaged. Please be careful not to apply the above specified force on the switch.
5. We have tried our best to ensure the quality of the switch when using the equipment with special safety requirements, but it is difficult to say that there will be no fault such as contact resistance change (increase), short circuit, open circuit, temperature rise and so on. When designing a complete set of devices that attach importance to safety, customers are expected to study the influence of the whole set of devices on the single failure of switches in advance.
6. If the materials around the switch produce corrosive gas, it may cause poor contact, so please make full confirmation in advance.
Application field of four foot touch switch
Four foot light touch switch has the advantages of small contact resistance load, accurate operating force error, specification diversification and so on. It has been widely used in electronic equipment and white household appliances, such as: audio-visual products: MP3, MP4, DVD. Audio; digital products: digital camera, digital camera, etc.; remote control: remote control of vehicles, rolling doors, home anti-theft products; communication products: mobile phones , car phone, telephone, building equipment, PDA, etc.; household appliances: TV, microwave oven, rice cooker, electric wind, electronic body scale, electronic fat scale, electronic kitchen scale, etc;. Because the four foot light touch switch can directly replace the large equipment and high load button with conductive rubber or metal spring piece of pot switch for environmental conditions (the pressure is less than 2 times of elastic / environmental temperature and humidity conditions and electrical performance).
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