The invention relates to a clasp for a bracelet or wristband comprising first and second blades, the first blade being articulated to the second blade by a first end, between a closed position, in which the second blade is folded onto the first blade, and an open position, in which the second blade is released from the first blade, the first blade being articulated at a second end to a member for attaching a first wristband portion,

According to the invention, the clasp comprises adjustment means arranged to adjust the position of the second blade with respect to the first blade in an open position, the adjustment means including a groove machined in the second blade, an arbor integral with the first blade and passing through the groove, the arbor receiving a pusher for releasing and/or locking it in order to move the second blade.

An attachment strap for a wearable electronic device is disclosed. The attachment strap attaches the wearable electronic device to a wearer, and may attach to a wrist of a wearer. The attachment strap includes two bands which attach to a clasp. The clasp operates in an open and closed configuration. When in the closed configuration, the clasp may not present a visible indication of its mechanism.

A clasp includes a lower holding member in which a lock pin is fixed, an upper holding member which is pivotably interlocked with the lower holding member, a lifting member which is attached to the lower holding member so as to be able to move in a lifting direction and a lowering direction and guides a first band, a lock member which is attached to the lower holding member so as to be able to pivot between a lock position and an unlock position, and a main cover. The lock member lifts the lifting member to the lower holding member side when being pivoted to the lock position so as to perform positioning and fixing of the first band while interposing the first band therebetween.

A clasp including: a first extension link that is formed in a U-shape and in which a closed end side is rotatably supported at one end of a clasp cover of a band; and a second extension link connected to an open end side of the first extension link via a connecting member, wherein, the second extension link is fixed to the first extension link at a position different from a connected position in the connecting member, and the first extension link is fixed to the clasp cover at a position different from the one end of the clasp cover where the first extension link is rotatably supported.

A band includes a clasp, wherein the clasp includes a cover member and an adjustment portion, the adjustment portion includes a pair of rail portions that are arranged along inner sides of two side walls of the cover member in a longitudinal direction of the cover member and have a plurality of grooves for length adjustment, a pressing portion that is disposed at an inner bottom surface of the cover member and includes an elastic member, and an engagement pin that is inserted through the one end of a adjustment piece and is configured to be engaged with the grooves of the rail portions, and the pressing portion is configured to press the engagement pin against the rail portions in a state where the engagement pin is engaged with the pair of grooves.

A clasp for a bracelet having first and second free ends, the clasp including: a device for adjusting the useful length of the bracelet including an adjusting member carrying a first bracelet fastening member, and a lock having a default closed state, in which the adjusting member is fixed, and an open state, in which the adjusting member is free to slide with respect to a second bracelet fastening member to modify the useful length of the bracelet. The adjusting device is distinct from the locking member, and the lock is arranged to change from the closed state to the open state thereof by action of the user such that the adjusting member is shifted independently of the open or closed state of the clasp. The control member includes a push-piece displaceable in response to an action of the user, the push-piece being independent of the lock.

Device for adjusting the length of a bracelet, having a guidance and fastening system (10, 30, 40, 50), including at least one adjusting link element (23) mounted with the ability to rotate about an axis of rotation (Al) defined by a guidance device of the guidance and fastening system. The guidance and fastening system (10, 30, 40, 50) includes an elastic fastening device comprising an elastic property in order to perform an elastic fastening function. The two guidance and elastic fastening devices are arranged around the axis (A1), notably upon implementation of the fastening function. The elastic fastening device provides elastic immobilization of an end link element (25) connected to the adjusting link element (23), particularly relative elastic immobilization of the said end link element (25) with respect to the adjusting link element (23), or of the adjusting link element (23), in at least one configuration of the adjustment device.

Device for adjusting the length of a bracelet, including at least one adjusting link element (23) mounted with the ability to rotate about a first axis (A1), the adjusting link element (23) being connected to an end link element (25) of a bracelet by a connecting pin (26), so that the end link element (25) can occupy two positions, each of these two positions respectively corresponding to a short and long configuration of the length of the bracelet, and wherein the bracelet length adjustment device includes an elastic fastening device so as to elastically fasten together the at least one adjusting link element (23) and the end link element (25) in the short configuration, in which configuration the elastic fastening device is arranged around a third axis (A3) that is not aligned with the first axis (A1).

A band includes a clasp, wherein the clasp includes a cover member and an adjustment portion, the adjustment portion includes a pair of rail portions that are arranged along inner sides of two side walls of the cover member in a longitudinal direction of the cover member and have a plurality of grooves for length adjustment, a pressing portion that is disposed at an inner bottom surface of the cover member and includes an elastic member, and an engagement pin that is inserted through the one end of a adjustment piece and is configured to be engaged with the grooves of the rail portions, and the pressing portion is configured to press the engagement pin against the rail portions in a state where the engagement pin is engaged with the pair of grooves.

A buckle apparatus for a wearable device may include a main body of the wearable device; a band for wearing the main body on a user's wrist; and a buckle assembly including a cover part to which a first end of the band is coupled and a coupling part in which a second end of the band is inserted into and maintained. The cover part includes upper and lower covers coupled to each other to form rails, and the coupling part includes first and second link pieces hingedly coupled to each other and is assembled to the lower portion of the cover part.