Fastener device

Claim 1

A fastener device comprising: a male fastener having a belt connecting portion, a pair of opposite outward projecting pressing latch boards integrally formed at two front ends of said belt connecting portion, and a pair of recesses behind said pressing latch boards, each pressing latch board having an integral inward projecting latch lug formed with a middle notch; a female fastener having belt connecting portion, an integral latch seat being formed at a front end of said belt connecting portion of side female fastener, two latch sockets being respectively formed on two sides of said latch seat and a circular depression being formed on an upper face of said latch seat, a key hole being formed on a central portion of said circular depression; and a swivel lock knob received in said circular depression of said female fastener characteristically having a central boss integrally formed with a pair of opposite lock blocks for rotatably fitting into said key hole of said circular depression of said latch seat, whereby after said male fastener is assembled with said female fastener, said swivel lock knob can be rotated and pushed to make said lock blocks of said boss thereof engaged into said middle notches of said latch lugs of said male fastener, so that said pressing latch boards of the male fastener are prevented from being withdrawn and unlocked from said latch seat of said female fastener by unexpected external force.