The invention relates to a clasp for bracelets comprising a length adjustment device, characterised in that said adjustment device is devoid of a locking mechanism for blocking the length adjustment and/or of an activation member for unblocking a locking mechanism in order to allow the length adjustment in at least one direction of the length of the bracelet. The clasp of the present invention enables a user to finely adjust the useful length of the bracelet by thrust or traction on the bracelet strand.

A metallic watch strap, including a first metallic strap half and a second metallic strap half. The first metallic strap half extending along a longitudinal direction and having an upper side and a lower side. The second metallic strap half having a folding clasp with a first fastening structure equipped to be fastened to the first strap half and with a second fastening structure equipped to be fastened to the second strap half. The first fastening structure has a slide, which, in a first state, is displaceable relative to the first strap half in a guided manner, and including a fixation element, which, in a second state, abuts on the first strap half. The first strap half has fixation indentations and the fixation element has at least one fixation projection fitting into the fixation indentations. In the second state, the fixation projection engages into one of the fixation indentations.

A watchband can comfortably secure an electronic device to a wrist of a user. A connector can be provided along a segment of the watchband to receive and secure to another segment of the watchband. For example, a connector can include a housing with an inlet and an outlet, a first pad within the housing, and a second pad within the housing. When a watchband segment between the first and second pads is moved in a direction from the outlet toward the inlet, the first pad and the second pad move toward each other to clamp the watchband segment without plastically deforming the watchband segment.

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 (A1) 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.

The present invention concerns a bracelet clasp, of the deployant buckle type, comprising first and second strips articulated to one another, between a closed position for wear and an open position, said first strip carrying a member for attaching a first bracelet strand, said second strip including, at its second end, means for adjusting the length of the bracelet, the clasp further comprising at least one locking member for holding said first and second strips in their closed position. According to the invention, the length adjustment means include a bar movable relative to the second strip and carrying a stud intended to be inserted into a hole in the bracelet to define a point of anchoring of the latter to the clasp, the movable bar being able to move and define at least two positions associated with a useful length of the bracelet.

A bracelet clasp (1) of the deployant buckle type, including first and second strips (2, 4) articulated to each other via a first of their respective ends, between a closed position for wear, and at least one open position, the first strip (2) carrying a member (20) for attaching a first bracelet strand, the second, lower strip (4) having a loop member (28) at its second end defining a passage for a second bracelet strand and carrying a stud (30) intended to be inserted into a suitable hole in the bracelet strand to define an anchoring point of the latter to the clasp (1), the clasp (1) further including at least one locking member (11) for holding the first and second strips (2, 4) in their closed position, characterized in that the stud (30) is movable with respect to the loop member (28) and includes an actuator (34) arranged to move it and thereby define at least two predefined positions associated with a predefined useful bracelet length.

A watch clasp with a finely adjustable watch strap length includes: a watch clasp sliding holder, located on a back surface of a watch clasp case; a sliding stop module, fixing the watch clasp sliding holder to the back surface of the watch clasp case through engagement, where the sliding holder can slide between the watch clasp case and the sliding stop module; a stop spring bar, fixed to the watch clasp case, and an unlock module, fixed to the watch clasp case where the unlock module is engaged with the sliding stop module, and the stop spring bar and the unlock module are respectively located on two sides of the sliding stop module; and an extension latch assembly, where one end of the extension latch assembly is fixed to the watch clasp case, and another end of the extension latch assembly is fixed to an elastic fine-adjusting assembly.

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 belt connection structure of a wearable product is provided. A first transmission rack is provided on a side wall of a first elongate hole. A second transmission rack is provided on a side wall of a second elongate hole facing the first transmission rack. A gear is engaged with the first and second transmission racks respectively. A connecting member coaxial with the gear is provided on a side surface of the gear. A sleeve communicating with a slide way is provided on the outer side wall of an outer cover. The inner side wall of the sleeve is provided with teeth extending in the axial direction. At least two annular grooves are formed on the outer side wall of the sleeve. A belt button is mounted on the sleeve, and comprises a pressing portion and a connecting column. The pressing portion and the connecting column are slidable in the axial direction but are not rotatable relative to each other. Position limiting teeth are provided on the outer side surface of the connecting column. The circumferential surface of the connecting column is further provided with a snap-fit flange spaced from the connecting column. The snap-fit flange is engaged with an annular groove.

The invention relates to a bracelet clasp, in particular for a wristwatch, comprising a device for fine length adjustment of the bracelet. In one embodiment, the invention relates to a clasp with extensible buckle, and the adjustment device is provided on a blade intended for being inserted between two posts of a main blade when the clasp is closed. The adjustment device includes a locking pin, arranged in an orthogonal direction relative to the longitudinal direction of the clasp and housed so that at least one portion of the pin is provided above a common upper surface of the blades of the clasp. In one embodiment, the mobile piece of the adjustment device is pivotably mounted on the clasp.