Mis-mating design refers to a design that prevents two connectors from being mis-mated, usually achieved through structural design, also known as fool-proof design. Mis-insertion includes male-female matching but wrong insertion angle and male-female mismatch error. How to realize the error-proof insertion of the connector? It can be achieved in three ways: error correction, error prevention, and error tolerance.
Error correction design is a design that uses various methods to correct in time to avoid or reduce negative effects when it is impossible to prevent the operator from erroneous operation. For example, in the audio interface of the computer, when the microphone plug is inserted into the headphone jack by mistake, a prompt message will pop up on the computer screen to confirm whether to use the headphone. At this time, you can find that you have inserted the wrong jack with the microphone and realize the error correction.
The feature of error-proofing design is that the wrong operation cannot be completed, and the operation that the user can successfully complete is the correct operation. For example, the trapezoidal design of the HDMI interface, when the insertion direction is wrong, the connector cannot be inserted smoothly. Error-proofing designs are generally more reliable than error-correcting designs, but error-proofing designs are still used when error-proofing designs are difficult to achieve.
Fault-tolerant design means that no matter whether it is operated correctly or not, it will not affect the use of the product, and any operation is correct operation. A typical fault-tolerant design is the USB Type-C connector, which can be used normally when plugged in or out. The fault-tolerant design is more convenient to operate and has lower cognitive requirements for users. However, at the same time, due to the higher technical requirements for R&D of fault-tolerant design and the higher production cost of products, the connectors in real life are mainly designed to prevent errors.
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