Classifications

• • A—HUMAN NECESSITIES
  • A44—HABERDASHERY; JEWELLERY
  • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
  • A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
  • A44C5/18—Fasteners for straps, chains or the like
  • A44C5/20—Fasteners for straps, chains or the like for open straps, chains or the like
  • A44C5/2052—Fasteners provided with at least one push-button acting parallel to the main plane of the fastener and perpendicularly to the direction of the fastening

Definitions

• Bracelet clasps are already known, one of the elements of which comprises a rigid latch and the other of which is a cage in which one or two scrolls moved, urged by a spring and capable of being operated by means of a projecting end which moves. acts as a pusher. These clasps have the advantage of allowing aesthetic achievements capable of being incorporated into straps intended for high-end watches. In addition, they offer remarkable security and ease of opening.
• the object of the present invention is to make a clasp, in particular for a bracelet, which, while retaining the advantages of push-button clasps already known, allows constructions of small thickness, easy to manufacture and inexpensive, adjustable in length, with a flexible strap.
• the present invention has for its object a clasp, in particular for a bracelet, allowing, in addition to closing, the adjustment and blocking of the latter, comprising a first element consisting of a plate provided with a lock and having means for connecting one end of a bracelet strand, and a second element formed by a cage in which slides at least one transverse slider which is resiliently biased to hang on the latch and which presents means for retaining the another end of the bracelet per ⁇ putting to adjust the latter, characterized in that a movable clamping plate cooperates with said second element.
• fig. 1 is a top plan view of the two ends of a strap equipped with a known form of exé ⁇ execution of a clasp with two slides
• la.fig * 2 is a perspective view DCS ATEE larger scale of the clasp elements of fig ⁇ l fig.
• 3 is a sectional view through a horizontal plane along the line III-III of FIG. 4 of the clasp of fig. 2, fig. 4 a sectional view along line IV-IV of FIG. 3 of the same clasp
• fig. 5 is a perspective view on a smaller scale showing a variant of the clasp according to FIGS. 1 to 4, fig.
• FIGS. 8 and 9 are views, respectively in exploded perspective and in section of another embodiment.
• a fig. 1 shows approximately the shape of the clasp which will be described.
• An element 1 of this clasp is a cage containing two slides 2 and 3 which can be seen protruding in FIG. 1 the outer ends which play the role of pushers and make it possible to move these sliders transversely relative to the brace ⁇ let whose links 4 are connected to each other by intermediate elements 5.
• an additional intermediate element 6 ensures fine adjustment of the length of the bracelet. By removing this element, you can adjust the length of the bracelet to a half whole number of links.
• the cage 1 consists of a piece of sheet metal folded in the form of a tubular segment with a flat rectangular profile.
• the bottom of the cage 1 has an opening 7 and on one of its sides are welded connection elements 8.
• a retaining pin shown at 9 in FIG. 3 maintains the two slides 2 and 3 which are constituted by cut sheet metal segments, of elongated shape, the width of which is adapted to that of the internal space of the cage 1.
• the arrangement of the two slides 2 and 3 is also visible in fig. 3. We see that each slide has at its outer end a projecting part 2a_ or 3a which acts as a pusher and at its other end a reentrant part 2b, 3b, which acts as a locking rim.
• each locking edge is provided with a groove 10, 11, formed in its thickness.
• each slide 2 or 3 has a connecting zone 2ç_, 3c, which is a marginal zone passing next to the lock as will be seen below, while the outline of the slides provides sufficient transverse space to accommodate still in the cage. 1 a coil spring 12 which biases the slides outwards.
• the outline of each of the sliders is cut so as to provide guide zones either with the walls of the cage 1, or with corresponding zones of the other slider.
• the two locking edges 2b and 3b are pressed one against the other, enclosing the lock between them and the slide 3 is pressed by a portion of its periphery against the pin 9.
• the other element of the clasp visible more particularly in FIG. 2 and 4 comprises a plate 13 which can be housed under the cage 1 and which is connected to a connecting element 14 capable of being connected by an articulation to an element 4 of the bracelet.
• the actual lock 15 which has the shape of a cylindrical pin with an enlarged head 15a. This pin 15 is driven into a hole in the plate 13 as seen in FIG. 4 and the height of the enlarged head 15a is such that this head drowns in the grooves 10 and 11 of the coulis ⁇ buckets 2 and 3.
• Fig. 5 shows yet another possible arrangement using the same kind of clasp.
• Two ends of a bracelet 16 which can be a flexible bracelet of any type are permanently connected by a portfolio made up of two rigid blades hinged to each other 17 and 18 and a slide 19 with a profile in U, the sides of which have holes making it possible to connect one end of the rigid strip 18 at the desired location along this slide 19 which, moreover, is articulated at one of the ends of the bracelet 16, while the other end is articulated at one end of the rigid tongue 17.
• the latter carries a lock 20 having the same constitution as the lock 15.
• the front part of the slide 19 is shaped so as to constitute a cage in which are mounted two slides (not shown) and a spring having the same arrangement as the sliders 2 and 3 and the spring 12.
• a wall clasp is thus obtained which has a security which does not depend in any way on the fatigue of an elastic tongue, as is the case in most known wall clasps.
• One embodiment uses two locking elements, one of which is a protruding stud provided with a head and the other a housing formed in a cage containing two slides biased by a spring.
• FIGS. 6 and 7 the constitution of the elements of the clasp is even simpler than in the first embodiment described above.
• the two bracelet elements to be connected are designated in FIG. 7 by 27 and 28. These are leather or plastic strap elements, generally elements of a flexible bracelet.
• the element 28 is connected via a conventional spring bar 29 to a hooking plate 30 which plays the role of the plate 13 in the first embodiment.
• this plate 30 is cut from a segment of sheet metal of triangular shape. It has two raised edges 31 intended to receive the pivots of the bar 29 and at the center of its transverse edge it has a tongue raised 32 which will surround the bar 29 in a notch formed in the bracelet element 28.
• the lock 33 consisting of a cylindrical rod provided with an overhanging head is driven by its foot into a hole in the plate 30.
• the hooking element 30 cooperates in this fer ⁇ moir with a cage 34 which, as seen in FIG. 6, consists of a segment of rolled and folded sheet metal so as to comprise a tubular part 35 of 0 rectangular profile and a projecting part 36 whose profile is slightly triangular and which exceeds in height the upper level of the cage 35.
• a cage 34 which, as seen in FIG. 6, consists of a segment of rolled and folded sheet metal so as to comprise a tubular part 35 of 0 rectangular profile and a projecting part 36 whose profile is slightly triangular and which exceeds in height the upper level of the cage 35.
• Inside the cage are housed two sliders 37 and 38 whose ends project on either side of -5 the cage 35 and are accessible so as to constitute pushers, these sliders having one and 1'autre a rim notched in an arc of circle capable of engaging under the head of the latch 33 "A spring (not shown in fig. 6) tends to spread the heads of the two 0 slides 37 and 38 one of the
• a second bar 39 whose pivots serve as an axis of articulation to a clamping plate 40.
• the latter also consists of a plate of cut sheet metal, folded and stamped, the ears 41 folded vertically when the plate is horizontal, are provided with holes in which the pivots of the bar 39 can engage.
• this plate is articulated around an axis passing through inside the projecting part 36.
• the edge of the plate 40 that is to say the area which - - - tends between the ears 41 and 42, forms a domed boss 43 intended to cooperate with the rounded part which forms the top edge of the zone 36 of the part 34 of the clasp.
• this part of the plate.40 could also include an interior clearance, invisible from the outside.
• a very simple strap clasp is also obtained, the thickness dimensions of which are very small and which can be used to adjust the length of a flexible strap to the nearest millimeter, in particular a watch strap. .
• any untimely stalling is avoided since it is necessary to press at the same time on the two transverse pushers constituted by the heads of the slides 37 and 38.
• Fig. 8 is a view corresponding to FIG. 6, but representing another embodiment of the object of the invention.
• one of the clasp elements is constituted by a hooking plate 44 provided with two raised edges 45 in which engage the pivots of a bar connected to one end of a .brin of the bracelet.
• the plate 44 carries a rigid lock 46.
• the other element of the clasp comprises the cage 47 and the clamping plate 48.
• the cage 47 is a device of the same kind as the element 34, ie. which contains two slides 49 and 50 engaged in the cage 47 transversely movable "and each comprising a hooking element 51 for the slide 49 and 52 for the slide 50.
• a spring biases the slides so as to hold them in a position where an edge of the locking elements 51 and 52 is engaged under the head of the bolt 46 and where the outer ends of the slides protrude on both sides of the cage 47.
• a hole 53 passes through the cage right through and allows the engagement of the lock 46.
• the clamping plate 48 is designed to play the same role as the plate 40 of the device, according to Fig.
• the element 48 carries on its face turned towards the cage a head 57 fixed, for example by welding and which engages in a hole 58 in the end part of the strand 59 of the bracelet (see FIG. 9) . Because the stroke of one of the sliders 49 and 50 is longer than that of the other, the positioning of the plate 48 is carried out without special tools. It suffices first of all to hang the rim 54 or 55 which is turned towards the side of the slider having the shortest stroke by pressing the other slider fully then to allow the other slider to return through the opening 56 of the corresponding edge. Fig.
• the clasp 9 shows in section how the element 44 is connected to one end of the strand 60 of the bracelet via a bar 61 and how the element 47, 48 is arranged so that the strand 59 is superimposed on this element of so that the cage 47 engages above the plate 44 and recessed with respect to the projecting part constituted by the two flanges 45.
• the whole of the clasp has an arrangement of very low height.
• the described embodiment also allows executions of high aesthetic value, especially in the case where the clamping plate 48 or 40 is decorated on its upper face with a decoration which can be in relief or made in another way. Whatever the variant chosen, the clasp described can be produced in the form of a jewelry item of high quality of execution.

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• Buckles (AREA)
• Adornments (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=4266825

Family Applications (1)

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Family Cites Families (7)

• 1987
  • 1987-10-01 EP EP19870906065 patent/EP0287583B1/de not_active Expired - Lifetime
  • 1987-10-01 WO PCT/CH1987/000131 patent/WO1988002225A1/fr active IP Right Grant
  • 1987-10-01 JP JP62505589A patent/JP2534290B2/ja not_active Expired - Lifetime

Non-Patent Citations (1)

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