Patent ID: 8418323

Claim:
A buckle for swimming/diving goggles, with the buckle adapted to be mounted to a side of a body of the swimming/diving goggles and adapted to mount a head strap, with the buckle comprising: a coupling block including a front end having a coupling portion engaged with the body, with the coupling block further including a rear end spaced from the front end of the coupling block in a longitudinal direction, with the rear end of the coupling block having an insertion hole receiving the head strap, with the coupling block further including outer and inner sides spaced in a width direction perpendicular to the longitudinal direction, with the insertion hole including an inner peripheral wall, with the inner peripheral wall including a front end having a pressing edge facing the outer side of the coupling block, with a recess defined in the outer side of the coupling block and in communication with the insertion hole, with the outer side of the coupling block further including a pressing face behind the recess; and a pressing block mounted to the outer side of the coupling block and including outer and inner sides spaced in the width direction perpendicular to the longitudinal direction, with a pin mounted to the inner side of the pressing block at a location corresponding to the recess and the pressing edge of the coupling block, with the pin having a spacing to the pressing edge of the coupling block in the longitudinal direction, with the inner side of the pressing block including a first surface and a second surface located behind the first surface and having a slope different from that of the first surface, with a fulcrum located between the first and second surfaces and abutting the pressing face of the coupling block, with the first and second surfaces located corresponding to the pressing face of the coupling block, with the outer side of the pressing block including a pressing portion corresponding to the second surface, wherein an end of the head strap is extended forwards into the insertion hole of the coupling block and wound around the pin and extended rearwards out of the insertion hole, with the head strap folded in two and including an outer section and an inner section, and wherein when the pressing portion of the coupling block is pressed, the pressing block pivots relative to the pressing face of the coupling block about the fulcrum, the pin moves away from the pressing edge of the coupling block in the direction perpendicular to the longitudinal direction, increasing the spacing between the pin and the pressing edge in the longitudinal direction, allowing loosening of the head strap.