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What do you know about miniature spring fingers?


Release time:

2022-12-30

What do you know about miniature spring fingers? In life, the miniature spring finger structure will be used in automobiles, electronic equipment, electrical connectors and other fields. The head and end of such a spring form a spring ring after welding.

What do you know about miniature spring fingers?

What do you know about miniature spring fingers?


In life, the miniature spring finger structure will be used in automobiles, electronic equipment, electrical connectors and other fields. The head and end of such a spring form a spring ring after welding. When we encounter this kind of part structure, we often don't understand it very well, and we will have questions about "what is this. Next, we will follow Xiaobian in-depth understanding of the "miniature spring touch finger" to deal with the doubts and confusion in the heart.

微型弹簧触指

Spring contact refers to the oblique coil spring and the ring spring. Its coils are elliptical and inclined. When compressed, each coil will deform. No matter which part of the coil deforms, the entire spring will respond, keeping the load on each contact point consistent, thereby maintaining an almost constant elastic force as a whole.


Due to its structural characteristics, it has no restriction on the range of use and is suitable for various static or dynamic medium pressure and high pressure environments. It can be used for mechanical connection or for transmitting strong current. Widely used in automobiles, electronic equipment, high current connectors, high and medium voltage switches and other fields. Miniature spring contact fingers are very popular due to their powerful functions. In terms of manufacturing, the structure is simple, the volume is small, the material is small, and the cost is low. It can meet the requirements of equipment planners for small space and is suitable for compact planning. Thus, it can be simplified to a fine device with fewer Z components. The circular planning ensures that the miniature spring contact fingers can be contacted at multiple points with high concentrated force to achieve almost lossless contact, ensure large current-carrying capacity and stable conductive function, and ensure that the load of each contact point is consistent, so that the spring has Better wear resistance. After Z, in terms of production, the general structure allows it to have a wider working range, allows the joint surface to have a larger tolerance, and has greater adaptability to processing errors and assembly errors, which is more suitable for mass production.


The miniature spring contact fingers provided on the market are mainly used for electrical contact of high-voltage switches. In material manufacturing, high conductivity beryllium bronze CuCo ∈ Be(C17500), high strength beryllium bronze CuBe ∈ (C17200) and chromium zirconium copper CrZrCu(C18150). However, considering that the micro spring contact finger is not only a spring but also a conductor, from the perspective of various functions, the high conductivity beryllium bronze is the Zjia material of the coil micro spring contact finger. The product has high strength, good conductivity and high working temperature, and is suitable for 3.5KV ~ 100KV high voltage switch product line.


In order for the miniature spring contact fingers to play a full role in the device, not only the materials need to be carefully selected, but the planning also needs to be improved. The deflection point α of the spring affects the stress of the spring. The greater the α angle, the greater the deformation resistance, and vice versa. The α angle can be used to reduce the deformation force. For dynamic connection, when the micro spring contact finger is in full contact with the conductor and the guide sleeve, the lower the stress of the micro spring contact finger, the better; for static connection, the stress can be appropriately increased to further reduce the contact resistance.


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