Patent ID: 7275536

Claim:
A device for varying the length of strap on a mask for aquatic activities, the mask comprising a frame for supporting a lens and a plurality of fork-shaped portions extending from either side of the frame, each portion having a pivot about which a portion of the strap end is wrapped, the strap portion having a plurality of transverse stop ribs on one side, wherein the device includes a stop lever housed in each of the fork-shaped portions and a tooth extending from the lever for engaging one of the ribs, the lever having a substantially U-shaped member and a tongue extending from the base of the member such that the tongue is coplanar with and cantilevered in the lever, the tooth extending transversely from the tongue; wherein, on a side opposite the tooth, a head extends from the tongue, against which a wedge-shaped portion of a button abuts, sliding with respect to the fork-shaped portion in a plane generally parallel to the U-shaped member, whereby, when the button is pressed, the head slides away from the member, thereby lifting of the tongue and disengaging the tooth from the rib.