Patent ID: 7753613

Claim:
A connector, comprising: first and second housings capable of fitting together along a fit-on direction; said first housing having a front end and a plurality of walls substantially rigidly arranged relative to one another and defining a forwardly open receptacle extending rearwardly into the first housing along the fit-on direction, a to-be-locked part projecting rigidly outward from a first of said walls defining the receptacle and having a rearwardly facing lock surface aligned substantially perpendicular to the fit-on direction so that the to-be-locked part and the locking surface thereof are substantially immovable with respect to the walls of the housing; and said second housing having a terminal accommodation part with a front end configured for insertion in the receptacle of the first housing and an opposite rear end, a support projecting out from the terminal accommodation portion and a resiliently deflectable locking arm projecting from the support and being resiliently movable towards and away from the terminal accommodation portion, the locking arm having two bifurcated portions extending from the support toward the front end of the second housing to define a forwardly open cut-out therebetween, a locking opening formed through the locking arm at a position rearward of the cut out and forward of the support, a to-be-preventing portion between the cut-out and the locking opening, the to-be-preventing portion having a forwardly facing surface aligned perpendicular to the fit-on direction and a rearwardly facing surface aligned substantially perpendicular to the fit-on direction so that the rearwardly facing surface locks to said to-be-locked part for holding said housings undisplaceably relative to each other in a separation direction after said housings fit together properly; wherein said first housing has two prevention parts projecting rigidly from the first wall and spaced apart in a widthwise direction orthogonal to said fit-on direction and said separation direction of said housings, said prevention parts being disposed rearward of the to-be-locked part so that the prevention parts are substantially immovable with respect to the walls of the first housing, the prevention parts each having a forwardly facing locking surface aligned perpendicular to the fit-on direction and being locked to the forwardly facing surface of the to-be-prevented portion of said locking arm, thus preventing said housings which have fit together properly from being displaced relative to each other in the fit-on direction; and said prevention parts are disposed outward from said to-be-locked part in the widthwise direction and no prevention part being disposed in alignment with the to-be-locked part along the fit-on direction and the separation direction.