A clasp (100) for a watch bracelet including a cover (1) on a first side to a bracelet strand (200) and on a second side to a folding system (300), a connecting device assembled between the bracelet strand and the cover, and including a sledge (3) sliding in a longitudinal direction of the clasp between a first position wherein the sledge is engaged in the cover of the clasp (100), and a second position wherein the sledge is disengaged from the cover (1) of the clasp (100). The clasp (100) comprises a lever (2), provided with a toothed element (20), when pressed along a direction perpendicular to the bottom of the cover, causes the toothed element (20) to move from a rest position, in which the toothed element (20) is in mesh with a rack toothing, to an actuated position, in which the toothed element (20) is released.

A head frame for cameras that includes a forehead portion, a back head portion, a top head portion, and a chin portion all interconnected and adjustable to fit a user's head snugly. A camera mount is connected to the chin portion and is adapted to releasably hold a camera thereto, such that a user can use the camera in a hands-free mode.

A head frame for cameras that includes a forehead portion, a back head portion, a top head portion, and a chin portion all interconnected and adjustable to fit a user's head snugly. A camera mount is connected to the chin portion and is adapted to releasably hold a camera thereto, such that a user can use the camera in a hands-free mode.

Watch bands can be provided with an ability to dynamically adjust the fit of a watch against a wrist of a user. One or more of a variety of tensioners can be provided with a shape-memory alloy that responds to a stimulus to adjust a fit of the band. Such stimulus can be from user or actively applied by the watch.

Watch bands can be provided with an ability to dynamically adjust the fit of a watch against a wrist of a user. One or more of a variety of tensioners can be provided with a shape-memory alloy that responds to a stimulus to adjust a fit of the band. Such stimulus can be from user or actively applied by the watch.

The invention provides, in some embodiments, watch straps and watches that preserve the aesthetic features of a Nato or military-style watch strap while avoiding the drawbacks associated with the Nato watch strap. The watch straps and watches provide the aesthetic feature of a Nato watch strap without having extra layers of the watch strap between the watch case and the wrist of the wearer.

The invention provides, in some embodiments, watch straps and watches that preserve the aesthetic features of a Nato or military-style watch strap while avoiding the drawbacks associated with the Nato watch strap. The watch straps and watches provide the aesthetic feature of a Nato watch strap without having extra layers of the watch strap between the watch case and the wrist of the wearer.