What are the factors that affect connector insertion and extraction force?

Plugging and unplugging force is the key index of connectors, which is directly related to the performance and use of connectors. What is Plug and Unplug Force? The plug-in force of the connector is divided into plug-in force and pull-out force (pull-out force is also called separation force), and the requirements of the two are different. From the usage point of view, the insertion force is small and the separation force is large. Once the separation force is too small, it will easily fall off, affecting the reliability of connector contact.

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Contact pressure Contact pressure is the main factor that determines the contact resistance of connectors, and it is also the key factor that controls the plugging and unplugging force. Its core is affected by material properties, processing technology, contact deformation and other factors. If the contact pressure is too high, the plugging and unplugging force increases, and it is difficult to plug and unplug the plug. The total number of contacts The contact parts ensure the conduction of connector signals and power supply, and are also the main factor that determines the plugging and unplugging force. The greater the total number of contacts, the greater the pull-out force of the connector, especially the total number of high-frequency contacts. Therefore, the total number of connector contact parts, in particular the total number of high frequency contact parts, is directly related to the pull-out force. Assembly deviation of contact parts Due to the assembly error and manufacturing deviation of connectors, contact parts are prone to looper pin phenomenon during plugging and unplugging, and there will be additional extrusion force between the plug and the plug wall. This is also an important reason for the increase in connector plugging and unplugging force. Surface friction coefficient The insertion and removal of connectors can be regarded as friction, and the magnitude of friction is directly related to the positive pressure and frictional resistance between contact surfaces. Factors affecting contact friction resistance include contact material, surface roughness, surface treatment, etc. The greater the surface roughness, the greater the insertion and removal force, and the contacts will be damaged. At present, the standard requirement of plugging and pulling force generally does not exceed 100N, which meets the standard range and basically does not affect normal use and reliability.

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