CH701806A2 - Extensible strap clasp for watch, has control unit placed in plane parallel to cap and accessible only when deploying loop is unfolded, where sliding system slides between two extreme positions according to longitudinal axis of clasp - Google Patents

Extensible strap clasp for watch, has control unit placed in plane parallel to cap and accessible only when deploying loop is unfolded, where sliding system slides between two extreme positions according to longitudinal axis of clasp Download PDF

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Publication number
CH701806A2
CH701806A2 CH13612009A CH13612009A CH701806A2 CH 701806 A2 CH701806 A2 CH 701806A2 CH 13612009 A CH13612009 A CH 13612009A CH 13612009 A CH13612009 A CH 13612009A CH 701806 A2 CH701806 A2 CH 701806A2
Authority
CH
Switzerland
Prior art keywords
clasp
loop
cap
pusher
sliding
Prior art date
Application number
CH13612009A
Other languages
French (fr)
Other versions
CH701806B1 (en
Inventor
Pierre Buise
Original Assignee
Promotion Spa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Promotion Spa filed Critical Promotion Spa
Priority to CH13612009A priority Critical patent/CH701806B1/en
Publication of CH701806A2 publication Critical patent/CH701806A2/en
Publication of CH701806B1 publication Critical patent/CH701806B1/en

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Classifications

    • AHUMAN NECESSITIES
    • A44HABERDASHERY; JEWELLERY
    • A44CJEWELLERY; BRACELETS; OTHER PERSONAL ADORNMENTS; COINS
    • A44C5/00Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
    • A44C5/18Fasteners for straps, chains or the like
    • A44C5/22Fasteners for straps, chains or the like for closed straps
    • A44C5/24Fasteners for straps, chains or the like for closed straps with folding devices

Abstract

The clasp has a deploying loop (10) whose end is connected to a thread of a strap and another end is connected to a cap (16). A control unit (22) and a locking unit (20) are connected with the deploying loop to maintain the deploying loop in a folded state under the cap or to allow the deploying loop to unfold after a manual actuation of the control unit. A sliding system (26) slides between two extreme positions according to a longitudinal axis of the clasp. Another control unit i.e. button, is placed in a plane parallel to the cap, and is accessible only when the deploying loop is unfolded.

Description

Technical area

The present invention relates to a bracelet clasp having a first unfolding loop, a first end is intended to be connected to a bracelet strand and a second end is connected to a cap in which the first unfolding loop folds. First control and locking members are arranged on the cap so as to cooperate with the first deployant loop to keep it folded under the cap or allow to unfold after manual actuation of the first control members. The clasp further comprises a second deploying buckle with a first blade, a first end of which is intended to be connected to a strand of the bracelet and a second end of which is articulated with a second blade, the second blade being connected to the cap by a sliding system. on which the second blade is hinged. The sliding system is arranged to slide along a longitudinal axis of the clasp, between two extreme positions.

State of the art

It has been proposed clasps whose length can be adjusted in the longitudinal direction of the bracelet, in order to better adapt the bracelet to the contour of the wrist of his wearer.

The document CH667 979 describes a clasp having two sets articulated on a curved blade and fixed respectively to the first and second strands of the bracelet. One of the sets is attached to a central blade by means of a sliding hinge to allow adjustment of the length of the bracelet. The mobile assembly in translation comprises a locking hook integral with a pusher. This hook is embedded in one of the openings in the central blade.

One of the main drawbacks of such a system is that the set length is maintained when the clasp is locked, but is lost as soon as the clasp is open. It is therefore necessary to make a new adjustment with each use.

The present invention aims to provide an extensible clasp keeping the discretion of the system proposed by document CH667 979, that is to say in which the length adjustment system is invisible from the outside, while by overcoming the disadvantages that the system of the state of the art proposes.

Disclosure of the invention

More specifically, the invention relates to a clasp as mentioned in the first paragraph of this application, characterized in that said sliding system further comprises: a second locking member capable of cooperating with the cap, - A second control member for acting on the second locking member, said second control member being operable in a plane parallel to that of the cap and being accessible only when the first unfolding loop is unfolded.

Brief description of the drawings

Other features of the present invention will appear more clearly on reading the description which follows, with reference to the accompanying drawing, in which: <tb> - fig. 1 <sep> is a perspective view of a clasp according to the invention, <tb> - figs. 2 and 3 <sep> specifically show the pusher implemented in the invention, respectively in perspective and in transparency, <tb> - fig. 4 <sep> is an enlarged view of a portion of the clasp, shown in transparency, and <tb> - figs. 5, 6 and 7 <sep> show views in longitudinal section, respectively in folded, unfolded and dive positions.

Note that, for the sake of simplification, the bracelet has not been shown in the figures. Mode (s) of realization of the invention

The clasp according to the invention comprises a first 10 and a second 12 folding loops, the first being provided with first conventional locking means. The illustrated example offers one possibility among others to make this first loop.

Thus, in the drawings, the first unfolding loop 10 comprises a first blade 10a intended to be connected to the bracelet by its first end. This blade 10a is of the tuning fork type and has two branches which define an opening 10b therebetween. The walls of the branches have notches 10c whose role will appear later. The first blade 10a is articulated by its second end with the first end of a second blade 10d, sized to take place in the opening 10b when the first loop is bent.

The second blade 10d is connected by its second end to a cap 16. The latter is formed of a plate which defines a general plane. The edges of the plate oriented in the longitudinal direction of the clasp, are each provided with a flange 18. These form, with the bottom of the plate, a housing inside which take place first locking members 20, arranged so as to cooperate with the notches 10c of the first blade 10a to maintain the first folding buckle 10 in a folded position. Two push buttons 22 arranged vis-à-vis one of the other through the edges of the cap and are accessible from outside the clasp. These push buttons 22 form first control members arranged to act on the first locking members 20, so that they are released from their cooperation with the notches, allowing the opening of the first deployant loop 10.

The first unfolding loop 10 and the first control and locking members 20 may be of any type and are well known to those skilled in the art. We will not describe them any more. Nevertheless, for the following description, it will be specified that the control and locking members are arranged in a compartment 24 positioned in the housing of the cap 16. As can be seen in Figure 5, this compartment defines a space of height h. In the folded position, the first blade does not interfere in this height space h.

As mentioned above, the clasp according to the invention also comprises a second deploying buckle 12. This includes a first blade 12a whose first end is intended to be connected to the bracelet and a second end is articulated with a second blade 12d. In the example shown, the second blade 12d is of tuning fork type and the first blade 12a takes place between the branches of the second blade when the second folding loop 12 is folded. The second blade 12d is connected to the cap by means of a sliding system 26 on which it is articulated.

More particularly to the invention, the sliding system 26 comprises a carriage 28 arranged to slide along a longitudinal axis of the clasp, between two extreme positions. More particularly, the carriage 28 is dimensioned so as to take place in the housing defined between the edges of the cap. Each of these latter edges has, on its inner wall, a groove 30 oriented along the longitudinal axis of the clasp. The edges of the carriage 28 are freely fitted inside these grooves which form slides. In addition, the carriage 28 has a shoe 32 disposed projecting on its face located on the side of the cap 16. This shoe 32 takes place in a groove 34 formed longitudinally in the cap 16. The cooperation of the shoe 32 and the groove 34 participates in guiding in translation of the carriage 28. Note that the carriage 28 is assembled on the cap by introducing it by the groove which is made opening. After assembly of the carriage, the end of the groove is closed by a stop element 36 which limits the stroke of the carriage 28.

Each groove 30 is provided with a series of cavities 38, the cavities of each groove being located vis-à-vis each other. Typically, one can have five cavities, spaced each by 2 mm. We will understand further the function of these cavities 38.

A single pusher 40, defining a second control member is movably mounted on the carriage 28, with reference to it. The carriage 28 has an opening inside which the pusher 40 is adjusted so as to allow its translation. More particularly, the pusher 40 is capable of moving between translation in the longitudinal direction of the clasp. When the carriage 28 is assembled on the cap 16, the pusher 40 is movable in a plane substantially parallel to that of the cap 16.

To guide its movement, the pusher 40 comprises two oblong structures 42 cooperating with slots 44 that includes the carriage 28 (Figure 3). The structures 42 on the one hand and the slots 44 on the other hand, are oriented along the longitudinal axis of the clasp. It will be noted that other guiding systems, in particular by means of rods on which the carriage 28 could slide-mounted, may be provided by those skilled in the art.

The bottom of the slots 44 defines a stop which determines a first extreme position of the pusher, said recessed position. In addition, a rod 46 takes place in a hole 48 through the carriage 28 in the axis of movement of the pusher. The rod 46 is attached to the pusher 40 and can move with reference to the carriage. The rod 46 has a shoulder 50 forming a stop with a rim of the hole 48. This stop defines a second end position of the pusher, said rest position. Two springs 52 are interposed between the carriage and the pusher and exert a force tending to bring the pusher into its rest position. It can be seen in Figure 2, a space between the pusher 40 and the carriage 28 corresponding to the stroke of the pusher.

The pusher 40 is also provided with two pins 54 which are integral therewith and which are capable of moving along the longitudinal axis of the clasp, depending on the actuation of the pusher 40. The end of the pins 54 has a inclined plane whose role will appear later.

The carriage 28 is further arranged to receive a first and a second pads 56 mounted movably inside the carriage, in a direction perpendicular to the longitudinal axis of the clasp. The pads 56 are guided in their movements by rods 58 sliding in corresponding openings 60. Each stud 56 is extended by a finger 62, protruding outside the carriage 28 and forming a second locking member. The fingers 62 are dimensioned and positioned so as to be able to take place inside the cavities 38 of the grooves 30. Springs 64 act on the pads 56 so as to bring the fingers 62 inside the cavities. The pads 56 are each further provided with an opening defining an inclined plane 66, oriented so that a pressure exerted on the inclined planes results in a resultant force bringing the pads 56 towards the inside of the carriage and thus bringing the fingers 62 out of the cavities. The pins 54 and the pads 56 are arranged so that their respective inclined planes cooperate together, and they are arranged parallel in pairs.

For its actuation, the pusher 40 has a surface 68 knurled allowing a user to solicit. The height of the pusher being relatively low, an actuating member 70 is provided to overcome the pusher and provide an additional surface to the user to facilitate the actuation of the pusher. Typically, the actuating member 70 is constituted by a wafer whose surface extends the knurled surface 68 of the pusher, the surface of the wafer is also knurled. Note that that the blades of the second deploying loop 12 which is located opposite the actuating member 70, has an opening 72 to allow free passage of said actuator member when the loop is folded. According to the example, it is the first blade 12a which has this opening in which the actuating member 70 can freely take place.

[0022] Optionally, the folded position of the second deploying buckle can be maintained by a notch system. This can be achieved, for example, by the cooperation of a bulge with a recess provided on the side of the first 12a and second blades 12b. Thus, it can be seen in the figures of the recesses 76 located on the inner side of the second blade and the bulges 74 located on the outer side of the first blade. To allow the engagement of bulges in the recesses, the second blade is tuning fork type, which gives it an ability to deform elastically.

The carriage 28 is still provided with means to allow its attachment to the second deploying buckle. We can see in the figures two ears 78 on which the second blade of the deploying buckle can come hang, with the help of a bar 80.

Note that the carriage 28 and the second folding loop 12 are dimensioned so that when the second loop is folded, it and the carriage are entirely located in the housing, between the bottom of the cap and the level h defined above. Thus, when the first loop 10 is closed on the second, the second loop 12 and the sliding system 26 are completely invisible, the second locking and control members being completely concealed.

We will now describe how the clasp according to the invention operates for the adjustment of its length, that is to say the length separating the two ends of the bracelet connected by the clasp. The first operation is to open the two folding loops 10 and 12 of the clasp. The first 10 is opened by an action on the push buttons 22 and the second loop 12 is opened by a simple traction on the first blade 12a, enough to cross the notch. It is then possible to access the sliding system 26 and more particularly to its pusher 40. The latter is then in its rest position, in which it has no action on the pads 56, the fingers 62 then being inserted in the cavities 38 and now the position of the sliding system 26.

A pressure exerted on the pusher 40 in the plane of the cap 16, has the effect of bringing the pusher into its depressed position. The pins 54 then exert pressure on the inclined planes 66 of the pads 56, which are thus displaced towards one another. The fingers 62 are in a free position, outside the cavities 38 of the cap 16. The carriage 28 can then slide freely with reference to the cap, between the grooves 30 of the latter. Once the carriage 28 is positioned substantially at the desired position, the pressure is released on the pusher 40 and a slight repositioning possible allows to put the fingers 62 in front of the cavities 38, the fingers engaging automatically under the effect of springs 64. It is then sufficient to close the second 12 then the first 10 loops to close the clasp, the sliding system and the second loop being completely invisible to the wearer.

Note also that the clasp can be used in a second manner, typically for use in diving, to arrange the watch over a combination. In this case, as shown in Figure 7, the second loop 12 is kept completely unfolded, the second blade extending substantially in the plane of the cap. The sliding system can be adjusted in this position. The first loop can be closed and locked while keeping the second loop open, which gives the clasp, and therefore the bracelet, a substantially greater length.

Thus is proposed an original extensible and discreet clasp. The above description has been given by way of non-limiting illustration of the invention and the skilled person will be able to provide certain variants without departing from the scope of the invention defined by the claims. Note in particular the possibility of having only one finger acting asymmetrically in the cavities of the cap.

Claims (11)

1. A bracelet clasp having a first unfolding loop (10), a first end of which is intended to be connected to a strand of the bracelet and a second end of which is connected to a cap (16) under which the first unfolding buckle folds, first control members (22) and locking means (20) arranged on the cap so as to cooperate with the first folding loop to keep it folded under the cap or allow it to be unfolded after manual actuation of the first control members; second deployant loop (12) with a first blade whose first end is intended to be connected to a strand of the bracelet and a second end of which is articulated with a second blade, the second blade being connected to the cap by a sliding system (26 ) on which it is articulated, said sliding system being arranged to slide along a longitudinal axis of the clasp, between two positions extreme ions, characterized in that said sliding system further comprises a second locking member capable of cooperating with the cap to maintain the position of the sliding system with reference to the cap, - A second control member for acting on the second locking member, said second control member being operable in a plane parallel to that of the cap and being accessible only when the first unfolding loop is unfolded.
2. Clasp according to claim 1, characterized in that said cap (16) comprises at least one series of cavities (38) formed in its wall, and in that said second locking member comprises at least one finger (62) movable perpendicularly to the longitudinal axis, between a free position in which it is outside the cavities (38), and a locked position in which it is in one of the cavities (38).
3. Clasp according to claim 2, characterized in that a first spring (64) is arranged to exert a force tending to bring said finger (62) in its locked position.
4. Clasp according to one of claims 2 and 3, characterized in that the second control member is a pusher (40) capable of changing between two positions: - A rest position, in which it has no action on said second locking member, the pusher (40) being held in the rest position by the action of a second spring (52), and - A depressed position, in which it cooperates with the second locking member to bring the finger (62) in its free position.
5. Clasp according to claim 4, characterized in that the finger (62) is integral with a stud (56) provided with an opening defining an inclined plane (66), oriented so that a pressure exerted on the inclined plane results in a resultant force bringing the finger (62) into its free position, and in that the pusher comprises a pin (54) arranged to cooperate with said inclined plane.
6. Clasp according to one of the preceding claims, characterized in that the second loop (12) comprises a notch system to maintain the folded position.
7. Clasp according to claim 6, characterized in that the notch system is free of apparent control member.
8. Clasp according to one of the preceding claims, characterized in that the second loop (12) and the sliding system (26) are fully housed in the cap (16) in a space left free by the first loop (10) .
9. Clasp according to one of claims 4 to 8, characterized in that the pusher (40) is surmounted by an actuating member (70) providing an additional surface to the user to facilitate the actuation of the pusher.
10. Clasp according to claim 9, characterized in that the actuating member (70) is constituted by a wafer whose surface extends the surface of the pusher.
11. Clasp according to one of claims 9 and 10, characterized in that that of the blades of the second deployant loop (12) which is located opposite the actuating member (70), has an opening (72). to allow free passage of said actuator member when the loop is bent.
CH13612009A 2009-09-02 2009-09-02 Clasp with a sliding system. CH701806B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH13612009A CH701806B1 (en) 2009-09-02 2009-09-02 Clasp with a sliding system.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH13612009A CH701806B1 (en) 2009-09-02 2009-09-02 Clasp with a sliding system.

Publications (2)

Publication Number Publication Date
CH701806A2 true CH701806A2 (en) 2011-03-15
CH701806B1 CH701806B1 (en) 2014-10-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CH13612009A CH701806B1 (en) 2009-09-02 2009-09-02 Clasp with a sliding system.

Country Status (1)

Country Link
CH (1) CH701806B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2532262A3 (en) * 2011-06-10 2013-11-27 Suunto Oy Asymmetric butterfly clasp
EP3292784A1 (en) * 2016-09-12 2018-03-14 Ball Watch Company SA Watch strap clasp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2532262A3 (en) * 2011-06-10 2013-11-27 Suunto Oy Asymmetric butterfly clasp
US8789246B2 (en) 2011-06-10 2014-07-29 Suunto Oy Asymmetric butterfly clasp
EP3292784A1 (en) * 2016-09-12 2018-03-14 Ball Watch Company SA Watch strap clasp

Also Published As

Publication number Publication date
CH701806B1 (en) 2014-10-31

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Legal Events

Date Code Title Description
PCAR Change of the address of the representative

Free format text: NEW ADDRESS: AVENUE EDOUARD-DUBOIS 20, 2000 NEUCHATEL (CH)

PFA Name/firm changed

Owner name: PROMOTION SPA, IT

Free format text: FORMER OWNER: PROMOTION SPA, IT

PL Patent ceased