Pogo pin momentary disconnection refers to the phenomenon that pogo pin momentary disconnection is prone to occur when vibration, impact, collision, etc. occur during the use of pogo pin connectors, affecting the electrical continuity of the contact pair. There are two conditions to determine whether a pogo pin momentary disconnection occurs: duration and voltage drop, both of which are indispensable. So how to solve the pogo pin momentary disconnection problem? You can consider the following points.
1. Improved design
Traditional spring loaded pin design may lead to unstable electrical connection due to spring fatigue and poor contact. In the design of spring loaded pin, ensure that the contact surface between the needle and the needle tube is smooth, and adopt a bevel design to ensure stable contact. In addition, the stress distribution can be improved by increasing the number of microstructure contact points and adjusting the contact spacing, thereby improving the overall electrical contact performance.
2. Optimize material selection and plating
Select high-quality materials and ensure batch-to-batch consistency to reduce the instability of contact impedance. For example, using lead-free brass with gold-plated spring loaded pins can improve corrosion resistance and conductivity, thereby reducing the possibility of poor contact. Select springs with high elasticity and good conductivity, and use surface plating such as gold plating or nickel plating to improve corrosion resistance and conductivity. This helps reduce voltage drop and contact resistance during current transmission.
3. Optimize the connection design between pogo pin and PCB
The welding quality between pogo pin and circuit board is very important. If the welding point is loose, cold or desoldering, it will cause the charging circuit to be interrupted during operation. Use professional welding equipment, such as a constant temperature soldering iron, to re-solder the welding point. After welding, the welding quality can be checked through a magnifying glass to ensure that the solder joint is full, free of bubbles and cracks. For example, in the production process of electronic equipment, the quality inspection of spring loaded contatc after welding is an important link, and the internal welding condition can be checked by X-ray inspection equipment.
4. Regular maintenance and replacement
For pogo pin connectors that are used for a long time, regular maintenance and replacement are necessary. This includes cleaning the dirt, grease and other contaminants on the connector, and replacing severely worn parts.
5.Environmental adaptability design
When designing pogo pin connectors, the impact of environmental factors on contact impedance should be considered, such as adding protective measures to prevent humidity and dust from entering, and using temperature-stable materials to reduce the impact of temperature changes.
Through the above measures, the intermittent disconnection problem of spring loaded pin during charging can be effectively solved, improving the stability of the device and user experience.
