Question:Test probeWhat are the important performance features?

Answer:Test probeIt mainly consists of three parts: spring, needle tube, and needle head. It is an important component for PCB or semiconductor testing, and the mechanical and electrical properties of the testing probe are the two major indicators that determine the quality of the probe.

1、 Test the mechanical properties of the probe. The mechanical performance of the testing probe mainly refers to the spring's elasticity, which usually ranges from 10% above and below the marked elasticity. For example, if the elasticity is 1N, the probe produced may be 0.9N. If the tolerance range is too large, it may damage the PCB or cause poor contact during testing, resulting in abnormal contact resistance.
2、 Test the electronic performance of the probe. The contact impedance mentioned above is a very important point. In theory, the smaller the impedance, the better. However, since zero resistance materials cannot occur in nature, the contact impedance needs to be stable during testing. Generally, the factors related to impedance mainly include the following:
1. The material of the needle, outer tube, and spring;
2. The difference between the diameter of the outer tube and the diameter of the needle;
3. The thickness of the gold plating layer.

So,Test probeThere are two main indicators, one is mechanical performance, and the other is electrical performance.

With the continuous development of smart consumer electronics products, smart wearables have gradually entered people's vision. Bluetooth earphones, smart wristbands, and smart watches are now everywhere. Since it is a wearable device, there will be strict requirements for volume, weight, etc. Being too bulky will affect the experience. This also promoted the development of pogo pin spring pins towards small and micro directions.

Pogo pin structure:

A pogo pin is a precision hardware and electronic component mainly composed of a needle, a spring, and a needle tube. The pogo pin mainly plays a connecting and conducting role, characterized by good conductivity, low resistance, and high stability., Generally used in: Bluetooth earphones, mobile phones, computers, printers, GPS positioning, communication devices, medical equipment, aviation equipment, etc.

The main advantages of pogo pin are:

Dynamic impedance stability, low inductance (for signal transmission), high current (for power connection), long lifespan, small size, and strong customizability; The use of pogo pins can easily achieve waterproofing, and special electroplating processes can also prevent sweat and contact allergies (wearing devices directly in contact with the skin).

Pogo pins, as an essential component of electronic products, are well designed to not only save space but also greatly reduce assembly difficulty. In recent years, electronic products have developed towards lightweight and small sizes, and electronic manufacturers have made rapid progress in pogo pins in order to save space.

The application of pogo pin on Bluetooth earphones has the following characteristics:

1、 Small volume:

The compact design of wearable devices has been well demonstrated on Bluetooth earphones, which requires the use of the smallest volume to achieve powerful functions, which greatly tests the design ability of product engineers. So the pogopin charging pin contacts used in Bluetooth earphones require a very small volume and also need to carry a large amount of current.

2、 Anti oxidation and corrosion:

Sports enthusiasts love to listen to music while exercising. Human sweat is corrosive, which requires the charging contacts of Bluetooth earphones to be resistant to oxidation and corrosion to ensure that the pogopin charging contacts are not corroded by human sweat and do not affect the functionality of Bluetooth earphones.

3、 To achieve waterproofing:

When you may be swimming while listening to music, Bluetooth earphones need to be waterproof, and the charging contact serves as the only point of connection with the outside world, which requires good waterproof treatment in terms of craftsmanship.