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difference between the needle shaft of the spring thimble?

time:2020-12-22 Views:228

  Is there any difference between the needle shaft of different spring thimble? The spring thimble is a precision instrument composed of three parts: needle tube, spring and needle shaft. The requirements in the processing process are also appropriate and strict. Different types of spring thimble needle shafts What is the difference in the manufacturing process.

  Is there any difference between the needle shaft of different spring thimble

  First, flat-head spring thimble needle shaft:

  1. Spring thimble needle shaft flat head features: easy manufacturing process, low cost;

  2, processing and manufacturing process: turning processing → vibration grinding process (removal of burrs, acute angles) → electroplating process;

  3. The vibration grinding process is to remove the burrs and sharp angles that occur during processing, and to reduce the phenomenon of Sha Sha Kaka during shrinking

  Second, the hypotenuse type spring thimble needle shaft:

  1. The characteristics of the hypotenuse of the spring thimble needle shaft section: now commonly used in the factory, with good electrical characteristics;

  2. Processing and manufacturing process: turning processing→secondary processing of beveling edge→vibrating grinding process (removing burrs and acute angles)→electroplating process;

  3. The tremor grinding process is to remove the burrs and sharp angles that occur during processing, and to reduce the shashaka phenomenon when tightening;

  4. There are two kinds of bevel angles in the factory now: 1) 12° → It is easy to assemble the pre-arranged needle shaft, and the length of the needle seat is short, which saves space. 2) 18° → Now commonly used in the factory, the length of the needle holder is long, and the tightness with the pipe wall after assembly is high and the resistance value is good.

  Third, reverse drilling type spring thimble needle shaft:

  1, spring thimble needle shaft reverse drilling feature: suitable for products with large contraction stroke;

  2, processing and manufacturing process: turning processing → secondary processing reverse drilling → vibration grinding process (removal of burrs, acute angles) → electroplating process;

  3. The tremor grinding process is to remove the burrs and sharp angles that occur during processing, and to reduce the shashaka phenomenon when tightening;

  4. There are two kinds of angles for reverse drilling in the factory: 1)120°→easy to drill. 2)160°→It is not easy to drill holes, but space for spring placement can be added.

difference between the needle shaft of the spring thimble?(图1)

  The internal structure of the spring thimble!

  Pogo pin is composed of three basic components: movable needle, spring and bobbin: movable needle, spring and coil former. They are pre-compressed and riveted, and mainly play a connection role; it is widely used in mobile phones, communications, automobiles, and medical care. , Aerospace and other electronic products and semiconductor equipment. According to different applications, the size is different, but the overall structure is not much different. There is a precise spring structure inside the pogo pin. In order to better improve its corrosion resistance, stability and durability, the surface of pogopin is usually gold-plated. In the actual power-on or power-on process, most of the pogo pins contact the copper wall through the lower slope of the pin. In order to reduce the load of the spring, the inner wall of the coil former must be smooth. In addition, the pogo pin is a very fine probe, so when applied to a precision connector, it can reduce the weight and appearance volume of the connected product, and make the product more refined and beautiful.

  How to improve the internal structure of the spring thimble!

  Pogo pins are common connectors in our lives, such as mobile phones, drones, POS machines and smart robots. Spring pins are used to connect and transmit signals in these devices. If there is a problem with the spring pin, the use of the entire device will be affected. Therefore, how can the Guangdong connector manufacturer optimize the performance of the spring pin? Here, follow Dongguan Jingcheng Industry Co., Ltd. to understand how the manufacturer can improve the structure of the spring pin. 1. Pogo pin inclined surface structure The pogo pin manufacturer's design concept can ensure low and stable contact resistance, and absolutely guarantee the stable conduction of the product. 2. Pogo pin back drilling structure The length of the matching spring designed by the pogo pin manufacturer can exceed the length of the needle tube. In the case of limited space, stable elasticity and stroke can be obtained by designing reverse drilling. 3. The flat bottom structure of the pogo pin In this design of the manufacturer, since the pogo pin and the pogo pin cannot be in contact under certain conditions, the current cannot pass through the needle tube, and the tube wall will follow the spring, which will lead to excessive resistance of the electronic product , The voltage drop is large and the current is unstable. The requirements for pogo pin springs are also high. In order to maintain precise dimensions, precision computer processing is used sincerely, with an accuracy of 0.02 mm, and the number of spring contractions can reach more than 500,000. The spring material is mainly stainless steel SUS304 and piano wire, which can improve the toughness of the spring and extend its service life. In order to improve the performance of the pogo pin, we continue to research and develop designs to find a suitable connector solution for the product.

  Pogo pin has roughly 3 components.

  Needle, spring, needle tube

  The needle and material are generally Becu or SK. Both have advantages and disadvantages. Becu has good conductivity, but lacks hardness. SK has high hardness, but it is easy to rust. Springs are also more important. SUS SWP, especially now that more and more PB free products du, directly cause the pins or BGA solder balls to become soft or hard. During the test, it was found that the original yield rate was very high. After changing the solder ball or pin material, the yield rate is extremely poor. The choice of spring pressure is very important. The test environment has strict requirements on the spring material. High and low temperature testing directly affects the working life of the probe. There are many needle tubes and materials to choose. Generally, PB materials are used. The most important internal cause of the low yield rate may be caused by the increase in impedance during the probe test process.

  The increase in impedance is mostly caused by the wear of the needle during the test, the destruction of the coating layer, and the tin hanging of the needle


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