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Introduction to the characteristics of miniature spring contact fingers


Release time:

2023-04-10

Micro spring contact finger is a small size, high precision mechanical parts, usually used in precision instruments, electrical equipment and automation control systems and other fields. Its main function is to realize the switching control of the circuit, and at the same time has the advantages of fast response, long life, low contact resistance and so on. The characteristics and related principles of the miniature spring contact fingers are described below.

Introduction to the characteristics of miniature spring contact fingers

Micro spring contact finger is a small size, high precision mechanical parts, usually used in precision instruments, electrical equipment and automation control systems and other fields. Its main function is to realize the switching control of the circuit, and at the same time has the advantages of fast response, long life, low contact resistance and so on. The characteristics and related principles of the miniature spring contact fingers are described below.

微型弹簧触指

Features of 1. miniature spring contact fingers


1. Small size: Miniature spring contact fingers are usually made by precision machining technology, which can achieve smaller size and weight to meet the needs of various compact space layouts.


2. High precision: Since the miniature spring finger is usually used in precision instruments and electrical equipment, its accuracy requirements are very high, and it can reach the sub-micron level.


3. Fast response: miniature spring touch finger spring structure design, can quickly respond to the signal, quickly switch control.


4. Long life: Because the miniature spring contact finger is made of high-strength materials, it has good wear resistance and corrosion resistance, so it has a long life, up to millions or even tens of millions of times.


5. Low contact resistance: The miniature spring contact finger is made of high-quality metal material, which has good conductivity and can ensure stability and reliability.


The principle of 2. micro spring contact finger


The principle of the micro spring contact is to control the circuit through the deformation of the spring. When there is no external force, the spring remains relaxed and the contacts are open. When an external force is applied, the spring is compressed or stretched, causing the contacts to close and connect. After the external force disappears, the spring returns to its original state, is disconnected, and the circuit is disconnected.


The design of the miniature spring contact finger should consider the mechanical characteristics to ensure the closing and opening of the contact. This includes the elastic modulus of the spring, deformation, load and rebound time and other factors. Within the spring structure, factors such as the support structure, compression position, and tension position are also considered to ensure accurate closing and opening.


The use of micro spring contact finger should pay attention to the matching of circuit and the interference of environmental factors. When matching, it is necessary to choose according to the number of loads and contacts to avoid the problem of burning the circuit or too fast contact wear. In some special environments, such as high temperature, high humidity, strong vibration and other conditions, it is necessary to take some special protective measures to ensure the normal use of the micro spring contact finger.


In summary, the miniature spring contact finger is a small size, high-precision mechanical parts, with fast response, long life and other advantages. The principle is to realize the switch control of the circuit through the deformation of the spring, and pay attention to the matching of the circuit and the interference of environmental factors when using it. With the continuous development of science and technology, the application range of micro spring finger is also expanding, I believe it will play an important role in more fields in the future.


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