Fastener Structure Between a Diving Flipper and a Tightening Strap Thereof

1. A fastener structure comprising: a male fastener comprising a male housing including a front wall with a tenon extending in a forward direction, said tenon defining two side walls and two wings, wherein each of said wings includes a recess, said male fastener comprises a lateral revolving shaft near a rear end in an interior of said housing around which a strap is wound, each of said two side walls includes a pivot hole to receive a pivot of a holding down plate, said holding down plate includes more than one pressing block inside a front end thereof and a beveled convex tooth inside a rear end thereof, said male fastener further includes more than one beveled elastic piece each in a position corresponding to said pressing blocks so that said strap is releasably secured in position; and a female fastener comprising a female housing, defining two sides, with two fastening plates extending inward through openings in each of said two sides of said female housing, said fastening plates are pivotally attached to a bottom of said female housing, said fastening plates include a pressing portion on an outer surface thereof and a catch on an inner end, said fastening plates each include a flexible beveled arm at a point that is on a side of a pivot point of said fastening plate that includes said catch, said beveled arms contact inner walls of said female housing, thereby biasing said catches to improve their stability and to decrease a possibility of unintentional detachment of said catches when they are engaged with said recesses of said tenon of said male fastener, said female housing further includes a covering plate to cover an opening on a top side of said female housing, said covering plate including catches that are received in recesses in said inner walls of said female housing, a bottom surface of said female housing includes an assembling/disassembling hole comprising a large hole with a smaller hole connected thereto, said assembling/disassembling hole being adapted to receive a button of a diving flipper; wherein said fastener is secured by inserting said male fastener into said female fastener such that said catches of said female fastener are received in said recesses of said male fastener, said fastener being released by pressure applied to said pressing portions such that said biasing of said beveled arms is overcome and said fastening plates pivot to release said catches from said recesses.

2. The fastener of claim 1 wherein: said beveled elastic pieces each include an upward angled wall at an end thereof.

3. The fastener of claim 1 wherein: said tenon of said male fastener includes more than one convex track on a top side thereof, and said female fastener includes more than one corresponding concave tracks on an underside of said top side of said female housing.

4. The fastener of claim 1 wherein: two elastic retaining plates conforming to the shape of a front end of said male housing are provided on a rear end of said covering plate of said female fastener.

5. The fastener of claim 1 wherein: connection point of said large hole and said smaller hole of said assembling/disassembling hole, has two sides and includes a convex check tooth angled toward said smaller hole.