Push button type fastener releasable by rotation

Claim 1

A push button type fastener comprising: a stud assembly attachable to a moving side panel, said stud assembly including a stud with a cam at its tip, a wall portion at the rear position thereof and an engaging surface therebetween, and a spring; and said cam having two planar surfaces spaced apart a distance; a socket attachable to a fixed side panel, said socket including a base portion and a pair of resilient arms projecting angularly from said base portion and converging toward each other such that said base and said pair of arms substantially form a triangle, said resilient arms further having stopping surfaces at their tips; wherein said stud can be pushed between said pair of resilient arms, against the yielding bias of the spring, and then released so that said engaging surface is stopped at said stopping surfaces and said panels are fastened together; wherein said panels can be unfastened by rotating said stud; and wherein said cam and said wall portion of said stud assembly are directly connected together in a twisted relation without any intervening structure and the portion of said cam that is immediately adjacent said wall portion forms said engaging surface, said engaging surface having a thickness substantially equal to the distance between the two planar surfaces of said cam.