EP3501325A1 - Clasp for bracelet - Google Patents

Abstract

The invention relates to a clasp (1) for a bracelet comprising at least first and second blades (2, 3), the first blade (2) being articulated to the second blade (3) by a first end, between a position closed, said bearing position, wherein the second blade (3) is folded over the first blade (2), and an open position in which the second blade is disengaged from the first blade, the second blade (3) carrying a second end a fastener of a first bracelet strand, a second bracelet strand being connected at least indirectly to the first blade, the clasp (1) further comprising:
locking means capable of holding the first blade in its closed position,
means for adjusting the useful length of the bracelet, the means for adjusting the useful length of the bracelet comprising a cap (6) mounted on a base plate (7) secured to the second end of the second blade (3), and the fastening member of the first strap strand sliding between the cover and the base plate,
According to the invention, the fastener slides in a longitudinal direction of the clasp between a first position in which the fastener is at least partially engaged in the clasp cover, to at least a second position in which the member fastening is released from the clasp cover by exerting pressure on the cover in a direction perpendicular to the clasp to slide it.

Description

Field of the invention

The invention relates to a clasp for a bracelet with a comfortable setting, and in particular for watch bracelets.

Background of the invention

It is known from the document EP 1 464 245 a clasp with a folding clasp comprising two bent arms, one lower and the other upper, each provided with a concave face and a convex face, the concave face of the upper arm being adjacent to the convex face of the lower arm; closed position of the clasp, the upper arm being elastically deformable in bending, locking means, comprising two parts, each associated with one of the arms, the first part comprising at least two cutouts and the second part a head arranged so as to engage in notch in one or the other cut, by elastic deformation of the upper arm, connecting means connecting the arms to one another in an articulated manner at one of their ends, around an axis substantially parallel to the faces of the arms, and allowing the upper arm to occupy at least two positions in which the head can be engaged in one or the other of the cutouts, and means for fixing the strands of u n bracelet arranged at the other end of the arms.

The manipulation of such a mechanism is not easy for a user because the axis is movable with the arm so that the axis can end up cantilever depending on the game and block the arm in a unwanted position. In addition, the locking of the position is not completely reliable, there is a risk that in short position the clasp when opening goes long position against the will of the user.

Summary of the invention

The invention particularly aims to overcome the various disadvantages of these known techniques.

More specifically, an object of the invention is to provide a clasp for a simple and quick adjustment of the length of a bracelet strand.

• des moyens de verrouillage aptes à maintenir la première lame dans sa position fermée,
• des moyens de réglage de la longueur utile du bracelet, les moyens de réglage de la longueur utile du bracelet comprenant un capot monté sur une plaque de base assujettie à la seconde extrémité de la deuxième lame, et l'organe de fixation du premier brin de bracelet coulissant entre le capot et la plaque de base,

These objectives, as well as others which will appear more clearly later, are achieved according to the invention with the aid of a bracelet clasp comprising at least first and second blades, the first blade being articulated to the second blade. at a first end, between a closed position, said bearing position, in which the second blade (3) is folded over the first blade, and an open position in which the second blade is disengaged from the first blade, the second blade bearing at a second end a fastener of a first bracelet strand, a second bracelet strand being connected at least indirectly to the first blade, the clasp further comprising:

• locking means adapted to hold the first blade in its closed position,
• means for adjusting the useful length of the bracelet, the means for adjusting the useful length of the bracelet comprising a cap mounted on a base plate secured to the second end of the second blade, and the fastener of the first strand of sliding strap between the hood and the base plate,

According to the invention, the fastener slides in a longitudinal direction of the clasp between a first position in which the fastener is at least partially engaged in the clasp cover, to at least a second position in which the member fastening is released from the clasp cover by exerting pressure on the cover in a direction perpendicular to the clasp to slide it.

• l'organe de fixation comprend au moins un premier cran et un deuxième cran agencé pour passer d'une première position dans laquelle le premier cran est en prise avec un pion solidaire de la plaque base, à une seconde position dans laquelle le deuxième cran est en prise avec ledit pion ;
• les moyens de verrouillage comprennent au moins un poussoir monté entre la plaque de base et le capot ;
• le capot comprend un premier usinage dans lequel coulisse ledit organe de fixation du bracelet, ledit organe ayant une forme complémentaire à celle de l'usinage ;
• l'organe de fixation comprend des moyens de butée définissant la course dudit organe de fixation ;
• le capot comprend un deuxième usinage pour recevoir ledit au moins un poussoir ;
• lesdits au moins premier et deuxième crans sont formés directement dans ledit organe de fixation ;
• la plaque de base, ledit au moins un poussoir, ledit organe de réglage et le capot sont superposés successivement les uns au-dessus des autres ;
• les moyens de verrouillage comprennent au moins un ressort configuré pour coopérer avec ledit au moins un poussoir de manière à contraindre le poussoir en position verrouillée ;
• la plaque de base comprend des moyens de guidage dudit au moins un poussoir ;
• la première lame comprend un téton solidaire de cette dernière, ledit téton étant agencé pour passer au travers d'un orifice de la plaque de base et coopérer avec ledit au moins un poussoir.

According to other advantageous variants of the invention:

• the fixing member comprises at least a first notch and a second notch arranged to pass from a first position in which the first notch is engaged with a pin integral with the base plate, to a second position in which the second notch is engaged with said pin;
• the locking means comprise at least one pusher mounted between the base plate and the cover;
• the cover comprises a first machining in which said fastening member of the bracelet slides, said member having a shape complementary to that of machining;
• the fixing member comprises stop means defining the stroke of said fixing member;
• the cover comprises a second machining for receiving said at least one pusher;
• said at least first and second notches are formed directly in said fastener;
• the base plate, said at least one pusher, said adjusting member and the cover are superposed successively one above the other;
• the locking means comprise at least one spring configured to cooperate with said at least one pusher so as to constrain the pusher in the locked position;
• the base plate comprises means for guiding said at least one pusher;
• the first blade comprises a stud secured to the latter, said pin being arranged to pass through an orifice of the base plate and cooperate with said at least one pusher.

The invention also relates to a wristwatch comprising a bracelet provided with a clasp according to the invention.

Thus, the object of the present invention, by its different functional and structural aspects described above, provides a clasp whose adjustment of the length of a strand is particularly easy and fast.

Brief description of the drawings

• la figure 1 est une vue en perspective d'un fermoir conforme à l'invention ;
• la figure 2 est une vue éclatée d'un fermoir conforme à l'invention ;
• la figure 3 est une vue éclatée des moyens de réglage d'un fermoir conforme à l'invention ;
• les figure 4a et 4b illustrent respectivement une vue de profil et une vue en coupe selon la ligne AA de la figure 4a des moyens de de réglage d'un fermoir conforme à l'invention ;
• la figure 5 est une vue de dessous en perspective des moyens de réglage d'un fermoir conforme à l'invention ;
• les figures 6a à 6c illustrent la cinématique des moyens de réglages pour modifier la longueur utile d'un bracelet.

Other features and advantages of the invention will appear more clearly on reading the following description of a particular embodiment of the invention, given as a simple illustrative and nonlimiting example, and the appended figures, among which: :

• the figure 1 is a perspective view of a clasp according to the invention;
• the figure 2 is an exploded view of a clasp according to the invention;
• the figure 3 is an exploded view of the adjustment means of a clasp according to the invention;
• the Figure 4a and 4b respectively illustrate a profile view and a sectional view along the line AA of the figure 4a means for adjusting a clasp according to the invention;
• the figure 5 is a perspective bottom view of the adjustment means of a clasp according to the invention;
• the Figures 6a to 6c illustrate the kinematics of the adjustment means for modifying the useful length of a bracelet.

Detailed Description of the Preferred Embodiments

An adjustable strand bracelet clasp according to a first exemplary embodiment will now be described in the following referring jointly to Figures 1, 2 , 3, 4a , 4b , 5, 6a, 6b and 6c .

The invention relates to a clasp 1 for a bracelet, of the clasp type, comprising at least first and second blades, the second blade 3 being articulated to the first blade 2 by a first end, between a closed position, said bearing position, in which the second blade 3 is folded against the first blade 2, and an open position in which the second blade 3 is released from the first blade 2.

The second blade 3 carries at a second end a fastener 30 of a first strand of a bracelet, a second strand of bracelet being connected at least indirectly to the first blade 2 by means of a fastening link 5 for example, the first blade 2 comprising locking means capable of holding the second blade 3 in its closed position. The attachment means of the first strand of bracelet or the first link may be in the form of a third blade 4 as illustrated in the figures, or one could also imagine that the strand or the link is directly attached to the first blade 2 , or indirectly attached to the first blade 2 via an articulated intermediate element.

The strands may be made of materials such as leather, fabric, canvas, or any other material known to those skilled in the art for making bracelets or belts.

It may also attach bracelet links, whether metal, ceramic, composite material or any other material known to those skilled in the art for the manufacture of links.

The first blade 2 may, for example, have a through hole in its center, said central orifice 10, the central orifice being configured to receive a pin 11 so that the pin cooperates with pushers or any other locking means of the clasp well known to those skilled in the art in the context of the present invention. It could also set up on the first blade 2 fixed hooks configured to cooperate with other hooks arranged on pushers for example.

Advantageously, the clasp comprises means for adjusting the useful length of the bracelet, the adjustment means comprising a cover 6 articulated in translation to the base plate 7 by its lateral edges, the plate base 7 being secured to the second end of the second blade 3 via an intermediate hinge member 70, the fastener of the first strap strand being slidably mounted between the cover 6 and the base plate 7.

As can be seen in figures 2 and 3 , the fastener 30 is movable and slides in a longitudinal direction of the clasp 1 between at least a first position in which the fastener 30 is at least partially engaged in the cap 6 of the clasp, to at least a second position wherein the fastener 30 is disengaged from the cover 6 of the clasp by exerting pressure on the cover 6 in a direction perpendicular to the clasp to slide.

According to the invention, and as illustrated in figure 4b , the fixing member 30 comprises at least one first notch 31 and a second notch 32, the fastener 30 being arranged to pass from a first position in which the first notch 31 is engaged with a pin 71 secured to the base plate, at a second position in which the second notch 32 is engaged with the pin 71. The first and second notches 31 and 32 are machined directly in the fastener 30. Of course, the fastener can have several setting notches according to the needs and the morphology of the wearer.

The cover 6 comprises a first machining 60, in the length direction, in which is housed and slide the fastener 30, the member having a shape complementary to that of the machining to limit play after assembly. In addition, the fixing member 30 comprises stop means 33 which define the stroke length of the latter and which also enable it to avoid dislodging the machining 60.

As illustrated in figure 3 and 4b , the fixing member 30 has a clearance 34 in the immediate vicinity of the stop means 33, so as to let the pin 11.

The cover 6 also comprises a second machining 61, of rectangular shape in the width direction to receive at least one pusher, or two pushers as visible in the figures, the pushbutton or pushers being mounted between the base plate 7 and the cover 6.

The first machining 60 and the second machining 61 are secant and form a zone defining the stroke length of the stop means, the latter moving in said formed area.

As can be seen at figure 3 , the fixing member 30 has three distinct levels, a first level comprising the abutment means 33, a second level of greater thickness than the first level and comprising the notches 31, 32, and a third level of a greater thickness at the second level and comprising means for attaching a bracelet strand or a link.

Such an arrangement makes it possible to have the base plate 7, the pushers 8, the adjustment member 30 and the cover 6 superimposed successively one above the other, the adjusting member 30 being caught between the cover 6 and the pushers 8 and / or the base plate 7.

The base plate 7 comprises a guide groove 72 for the pushbutton or 8, the guide groove being of complementary shape to the pushers, namely rectangular.

The base plate 7 also comprises a through hole 73, at the groove 72, through which the pin 11 secured to the first blade 2 passes. The two pushers 8 are arranged to be displaced in a direction perpendicular to the clasp 1, in response to pressure from the user, between a first rest position in which the cover assembly 6, member 30 and base plate 7, is locked in the closed position on the first blade 2, and a second pushed position in which the assembly is clear of the first blade 2.

The pushers 8 are formed by a body, of greater length than the width of the cover 6 and the base plate 7, so as to protrude on both sides of the cover. The pushers 8 are slidably mounted and cooperate in support with a spring to keep them apart. As can be seen in the figures, each pusher has a passage and a hook for passing the pin 11 and maintain it when the pushers are constrained by the spring.

According to a particularly advantageous aspect of the invention, the user can press the pusher 8 and the cover 6 in a direction perpendicular to the clasp to facilitate handling.

Thus, to adjust the clasp, the user first unfolds the second blade 3 of the first blade 2. Then, the user presses the cover 6, and optionally the pusher 8 just below, so as to shift the cover 6 from its rest position to one of the adjustment positions as on the Figures 6a to 6c Thus, the pins which were offset relative to the notches are placed in front of the passages formed in the notches 31 and 32 and the carrier can then move the adjustment member 30 in the desired position. Finally, once the adjustment member is positioned in the desired notch, the wearer releases the pressure exerted on the cover 6 which returns to its rest position under the effect of a spring cooperating with a pin, both being visible to the figure 4b and 5 . The pin being integral with the base plate 7 and defining the stroke length of the cover 6. The wearer only has to close the clasp 1 to wear the watch.

The invention also relates to a wristwatch comprising a bracelet provided with a clasp as described above.

With these different aspects of the invention, there is a clasp of simple design for adjusting the length of a bracelet strand.

Of course, the present invention is not limited to the illustrated example and is susceptible of various variations and modifications that will occur to those skilled in the art.

Claims (12)

Clasp (1) for a bracelet comprising at least first and second blades (2, 3), the first blade (2) being articulated to the second blade (3) by a first end, between a closed position, said position to wear, wherein the second blade (3) is folded over the first blade (2), and an open position in which the second blade is disengaged from the first blade, the second blade (3) carrying at a second end a fixing member of a first bracelet strand, a second bracelet strand being connected at least indirectly to the first blade, the clasp (1) further comprising: locking means capable of holding the first blade in its closed position, means for adjusting the useful length of the bracelet, the adjustment means comprising a cover (6) mounted on a base plate (7) secured to the second end of the second blade (3), and said fixing member of the first strand of sliding strap between the hood and the base plate, characterized in that the fastener is movable and slides in a longitudinal direction of the clasp between at least a first position in which the fastener is at least partially engaged in the clasp cover, to at least a second position in which the fastener is disengaged from the cover of the clasp by exerting pressure on the cover in a direction perpendicular to the clasp for sliding. clasp according to claim 1, wherein the fastener comprises at least a first notch and a second notch arranged to pass from a first position in which the first notch engages a peg integral with the base plate, to a second position in which the second notch is engaged with said pin. Clasp according to claim 1 or 2, wherein the locking means comprise at least one pusher mounted between the base plate and the cover. Clasp according to any one of claims 1 to 3, wherein the cover comprises a first machining in which slides said fastener of the bracelet, said member having a shape complementary to that of machining. Clasp according to any one of claims 1 to 4, wherein the fixing member comprises stop means defining the stroke of said fastener. Clasp according to any one of claims 1 to 5, wherein the cover comprises a second machining for receiving said at least one pusher. Clasp according to claim 2, wherein said at least first and second notches are formed directly in said fastener. Clasp according to any one of claims 1 to 7, wherein the base plate, said at least one pusher, said adjusting member and the cover are superimposed successively one above the other. Clasp according to any one of claims 1 to 8, wherein the locking means comprise at least one spring configured to cooperate with said at least one pusher (24) so as to constrain the pusher (24) in the locked position. Clasp according to any one of claims 1 to 9, wherein the base plate (21) comprises means for guiding said at least one pusher (24). Clasp according to any one of claims 1 to 9, wherein the first blade (2) comprises a pin integral with the latter, said stud being arranged to pass through an orifice of the base plate and cooperate with said at least one pusher. Wristwatch comprising a bracelet with a clasp according to any one of the preceding claims.

Images