The terminal positive force of the car connector is the force perpendicular to the contact surface generated on the contact surface of the common terminal and the female terminal, which is an important index of the connector performance. Simply speaking, it is the stress generated when the terminal is deformed by the external force. As there is a phenomenon called the stress relief, the stress will be smaller and smaller, and the terminal normal force will be smaller and smaller. In the practical application, the appropriate forward force varies from a few newtons to dozens of newtons, which is often difficult for car connector designers to grasp correctly.
The terminal positive force has a great influence on the car connector, which affects the insertion and extraction force, and the service life of the connector. The insertion and extraction force of the connector refers to the force required for the connection and separation of the common and female terminals of the connector under the specified insertion speed, which is mainly determined by the insertion force between the outer terminal and the inner terminal, while the insertion and extraction force between the outer and the inner terminals is mainly determined by the magnitude and direction of the friction. The car connector will be subjected to many times of unplugging in the process of using, and the terminal normal force will directly affect the contact surface of the worn terminal, thus affecting the service life of the connector.
It can be seen that the research on the terminal normal force can improve the quality of the car connector. Manufacturers will study the factors affecting the terminal positive force and change the performance of connector by changing these factors. But it is a little bit hard to conduct this kind of research, because the car connector is very small, and high precision is needed during processing. In order to solve production and design problems, factories have introduced a lot of precise processing equipment, which not only improves the quality of the car connectors, but also improves the production efficiency.
