Electric connector and locking method

A locking method of an electric connector, the electric connector being used for being electrically connected with an other adaptive connector, the locking method comprising the following steps:

• providing a first shell and accommodating at least one electric connection point capable of being electrically connected with the other connector in the first shell;
• providing a lock plate so that the lock plate is relatively fixed with the first shell;
• providing a second shell, which is at least partially located on the outer side of the lock plate and can slide relative to the first shell;
• and
• providing an actuating assembly, which is used for enabling the second shell to slide relative to the first shell so that the second shell is located at a first position or a second position relative to the first shell, wherein when the second shell is located at the first position, the part, located on the outer side of the lock plate, of the second shell deforms the lock plate towards the inner side so that the lock plate is frictionally locked with the outer surface of an outer shell of the other connector, and when the second shell is located at the second position, the lock plate is not frictionally locked with the outer surface of the outer shell of the other connector so that the electric connector can be separated from the other connector.