US Patent 7811126 Locking connector

A connector includes a body, a terminal base and a fixing base. The body has a terminal base groove consisting of a circular portion and a square portion suited to the profile of the terminal base. A protective base is provided to protect a first tenon from erroneously touched. A second tenon is utilized to engage with an annular recessed groove of the terminal base to combine the body with the terminal base in a first stage. The body has two sides having a first engaging projecting member and plural second engaging projecting members for engaging with those of the fixing base to complete a two-step engagement to enable the body, the terminal base and the fixing base combined together. The fixing base includes plural projecting-out rods and projecting-up rods to make the body combined with the fixing base, facilitating the connector conveniently assembled.