Two-piece fastener for releasably securing two panels together in

Abstract

A plastic re-usable two-piece push-pin stand-off fastener for releasably securing together two spaced-apart circuit boards comprises a hollow body having a body bore into which, for pre-assembly, a pin is insertable into the body bore prior to use. The pin has large and small outside diameter portions near its head and insertion ends, respectively. The body bore has large and small inside diameter bore portions near its head and insertion ends, respectively. The body also has outwardly extending inwardly depressible resilient flexible wings adjacent the large bore portion, has outwardly expandable resilient flexible legs adjacent the small bore portion, and has an external shoulder between the wings and the legs. In use, the body is inserted into a hole in the first board to entrap the board between the body head and wings. Then, the body is inserted into a hole in the second board so that the shoulder bears thereagainst. Finally, the pin is fully inserted into the bore to cause the legs to expand and entrap the second board between the shoulder and the expanded legs. Full pin insertion causes the large pin portion to enter the large bore portion to prevent the wings from flexing inwardly and locks the first board in place. Full pin withdrawal from the bore enables both boards to be disengaged from the body.