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Miniature spring touch the principle of you know?


Release time:

2022-11-10

A contact form suitable for large current and high-life plug-in-micro spring contact finger, through its structure and application, combined with the plug-in life and temperature rise test of different contact types, illustrates the advantages of its application to large current and high-life plug-in.

Miniature spring touch the principle of you know?

With the development of electric vehicles, the demand for high-current connectors is increasing, and their performance requirements are also very high. Not only the high-current requirements suitable for the vehicle vibration environment are required, but also the external interfaces such as the charging socket interface need to be longer. Service life. A contact form suitable for large current and high-life plug-in-micro spring contact finger, through its structure and application, combined with the plug-in life and temperature rise test of different contact types, illustrates the advantages of its application to large current and high-life plug-in.

微型弹簧触指

Miniature spring contact fingers are also called oblique coil springs and ring springs. The wound coil is oval and inclined. When compressed, each coil will deform. No matter which part of the coil is deformed, the entire spring will generate a reaction force. The load of all contact points is consistent, so the entire spring can maintain a nearly constant elastic force. Due to its structural characteristics, there is no restriction on its application range, suitable for all kinds of static or dynamic medium and high pressure environment.


What is the principle of micro spring finger? Let's introduce it to you.


1. Basic principle: As an elastic contact, it is installed between two rigid contacts to input and output electrical energy. By compressing a certain proportion, it generates elastic force to ensure reliable contact and evaluate whether the electrical contact is good. The standard is contact resistance.


2. Application principle: The working principle of touch-sensitive keys is that touch-sensitive keys have different principles according to different types. From this, it can be divided into two categories: resistive touch keys and capacitive sensing keys. The principle of capacitive touch keys is that the human body senses capacitance to detect the existence of the mobile phone. If there is a finger, it will have a certain sense of current, so this Can operate smart phones. To put it simply, when the human body is close to the capacitor button, the current generated by the human body is coupled to the static capacitor, which means that the capacitor value reaches a larger value. At this time, the changed capacitor value will transmit and convert the signal, so that the capacitor signal is converted into a certain control signal, thus realizing the function of controlling the smart phone. The working principle of the resistance type is to use the forced resistance of the human body to change the resistance, the change of resistance will cause the signal of the entire circuit to change, so as to achieve the effect of controlling the smart phone, but its shortcomings are very large, the pressure must reach a certain level, otherwise it will not achieve the goal, which is also a major part of the resistive touch button Disadvantages, so it will be eliminated by future digital products.


The advantages of miniature spring contact fingers are as follows: 1. The structure is simple, small in size, less materials, and low in cost, which meets the requirements of small space size in device design, and is suitable for compact design. Fewer components simplify the design of the connecting device. 2. Multi-point contact, high concentration force, can achieve almost non-destructive contact, ensure large current carrying capacity, good conductivity, high electrical and thermal stability. 3. The contact pressure of each contact point is not high, and the wear resistance is good. 4. The unique structure makes it work in a wide range, allows large tolerances on the contact surface, has great adaptability to processing errors and assembly errors, and is more suitable for mass production.


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