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Application principle of spring contact finger


Release time:

2022-08-12

Compared with traditional mechanical switches, electrical sensors using spring-touch capacitive sensors are a more robust alternative plan. Some things cannot be directly provided with a printed circuit board under the cover, nor can the printed circuit board be connected to the device housing. This kind of use includes home appliances such as stoves, washing machines, refrigerators, and microwave ovens, as well as various vehicle electronic equipment such as radios, TV tuners, control panels, and seat occupant detection systems, then, let's understand the application principle of spring touch finger together!

Application principle of spring contact finger

Compared with traditional mechanical switches, electrical sensors using spring-touch capacitive sensors are a more robust alternative plan. Some things cannot be directly provided with a printed circuit board under the cover, nor can the printed circuit board be connected to the device housing. This kind of use includes home appliances such as stoves, washing machines, refrigerators, and microwave ovens, as well as various vehicle electronic equipment such as radios, TV tuners, control panels, and seat occupant detection systems, then, let's understand the application principle of spring touch finger together!

弹簧触指

Spring contact finger sensor-can replace the solid conductivity sensor. This allows the PCB to be oriented away from the cover plate, providing a reliable sensor connection under operating conditions of high vibration or sharp temperature changes. In addition, the spring contact fingers can also provide other functions such as backlighting, fusion of mechanical and capacitor buttons, etc.


Product Materials


Qin carbon steel wire, low carbon steel wire, high carbon steel, manganese steel, nickel wire, 60SizMNA, spring stainless steel wire and other materials.


Appearance plating


Nickel, nickel-free white k plating, directly above gold, bottom gold, silver, bronze, silver, etc.


Selection specifications


contact button products provide the following parameters: 1. circular metal contact piece diameter. 2. Spring wire diameter. 3. Spring height. 4. Number of spring coils. 5. Spring outer diameter. 6. The inner circle diameter is required for hollow contact button.


Scope of application


Induction cooker, light stove, electric heater, disinfection cabinet, range hood, water heater, heater, vegetable washing machine, cash counter, massager, electric oven, electronic wine cabinet, water dispenser and other series are suitable for contact with small household appliances.


Precautions


Spring touch products are commonly used hardware parts in various professions. Screws and nuts, which are different from screws and nut mechanical parts, are sold in all hardware stores, but there are few springs. For example, in the two manufacturers, the appearance of the product is slightly different, but the required spring size, compression elasticity, tension and torsion are completely different. So springs don't have a lot of stock.


Spring touch button and capacitive sensor button, the principle of spring touch button is to use human body induction capacitance to detect whether there is a mobile phone? With a finger, the current will produce a certain induction, and you can operate the smart phone. Simply put, when the human body approaches the capacitor button, the current generated by the human body is coupled to the capacitor because the connected capacitor value reaches a large value. The capacitance value transmits the signal, converts the capacitance signal into a certain control signal, and realizes the function of controlling the smart phone.


The spring touch finger uses the compression resistance of the human body to change the size of the resistance. The change of the resistance has the effect of changing the overall signal of the circuit and controlling the smart phone. However, his shortcomings are very large, and he needs a certain degree of extrusion to achieve the purpose. It is also a major shortcoming of the resistive touch button, which is eliminated by future digital products.


The above introduction is the application principle of spring touch finger, if you need to know more, you can contact us at any time!


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