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
  • A44C5/2009—Fasteners for straps, chains or the like for open straps, chains or the like of the ring type
  • A44C5/2014—Fasteners for straps, chains or the like for open straps, chains or the like of the ring type of the spring ring type

Definitions

• the present invention relates to improvements to clasps for jewelry items, such as chains, bracelets or the like, comprising:
• the angular offset of the opening of the body of the clasp and its transfer in a region of the toric body close to the fixed ring makes it possible to ensure that the hooking ring of the other end of the jewelry item will be supported on the toric body, which is mechanically resistant with regard to its dimensions, and not on the bolt for closing the opening, which is mechanically weaker, as may occur in the production of clasps where the opening is located approximately opposite the fixed ring.
• the object of the invention is therefore essentially to propose a particular arrangement of such a clasp which gives all satisfaction in terms of use, in particular with regard to its resistance and the reliability of the closure, which can be achieved. with a minimum of material, in particular a minimum of noble material (gold for example), and therefore at a lower cost, and which is easy to handle for the user, in particular which can be handled in the same way as a classic clasp.
• a clasp of the aforementioned type arranged in accordance with the invention is essentially characterized in that:
• the actuating finger is located at the free end or in the immediate vicinity of the free end of the bolt
• At least one guide finger also projecting radially and engaged in a longitudinal slot of the body is carried by a region of the bolt remote from the end thereof supporting the actuating finger.
• the actuating finger is sufficiently disengaged from the fixed ring and can be easily held by the user, even during the opening movement when the bolt is moved in the direction of the ring. fixed.
• the presence of a guide finger improves the sliding of the bolt inside the toric body and avoids its jamming; it follows that the bolt (traditionally made quite long, precisely for its guidance in the toric body) can now be significantly shortened and, in the case of a manufacture of a precious metal such as gold, the financial gain thus obtained is very appreciable.
• the bolt completely disappears in said body in the open position of the clasp: for this purpose, it is desirable that the body has a second longitudinal slot, located at the external periphery of the body and opening onto 1 'Ouvertu ⁇ re hooking, to receive the actuating finger at the end of the bolt opening stroke.
• the first longitudinal slot intended for the guide finger is also located at the external periphery of the body and the guide finger extends radially outwards. It is then easier, for manufacturing, that the first and second slots are located one after the other and form a single slot.
• the guide finger is located in a central region of the bolt and, in an exemplary embodiment, the fingers actuation and gui ⁇ dage can then be joined in a single piece in the form of a plate projecting radially outward from the bolt and having a longitudinal extent from the free end of the bolt.
• the single slot extends under and beyond the fixed ring, and this ring is arranged in the shape of an arch spanning the slot, in order to provide a free passage for the guide finger; in this case, the fixed ring is a mechanically strong piece fixed to the body on either side of the slot and constituting a mechanical reinforcement preventing yawning of the edges of the slot.
• the bolt has a length such that it extends over the entire length of the slot and conceals it when it is in the closed position: in this way, the spring remains permanently invisible and can be made of a material traditional (steel for example) of lower cost, while only the visible organs are made of a noble material (gold for example).
• the first slot is arranged in the form of a lumen extending at the external periphery of the body, and the guide finger extends radially outwardly being located at the end of the opposite bolt to the one with the actuating finger.
• the first slot is arranged in the form of a lumen extending at the internal periphery of the body and the guide finger extends radially towards the inside of the torus formed by the body ? the guide means (finger and slot) are then more or less concealed from view.
• FIG. 1 is a front view, in partial section, of an embodiment of a clasp according to the invention
• FIG. 1 is a side view of the clasp of Figure 1;
• FIG. 3 and 4 are views, respectively of the front in partial section and from the side, of another embodiment of a clasp according to the invention
• FIGS. 5 and 6 are front views in partial section of two other embodiments, respectively, of a clasp according to the invention.
• Figures 7 and 8 are views, respective ⁇ ment from the side and from the front, - a variant of the mode of réa ⁇ realization of. Figures 3 and 4.
• the spring clasp or ring shown in Figures 1 and 2 comprises an O-ring or body 1 formed by a welded, strong and rigid tube having an opening 3 extending over forty five degrees of which the two sections are exactly opposite; the internal diameter of this O-ring 1 is approximately twice that of the tube.
• a small solid ring 2 is formed by a wire with a diameter greater than half that of the tube of the ring 1. This solid ring in the shape of a "U" is welded astride the tubular ring 1 for the hooking the end ring of a chain 12.
• the opening 3 is placed in the quarter of the tubular ring 1 between the diametrical line (A-A ') perpendicular to the axis of the small fixed ring 2 and the small ring itself, that is to say say near the fixed ring 2.
• a bolt 4 is formed of a solid wire of an adequate diameter whose curve is identical to that of the tube 1 to slide there perfectly. It is slightly longer than twice the opening 3.
• This bolt is provided with a guide pin or guide finger 5 on its outer part, on its longitudinal axis; this finger is approximately a quarter of the diameter of the bolt and is located substantially in the center of the latter; its height is equal to or greater than the thickness of the outer wall of the tube 1.
• a groove or slot 6 cut on the outside of the tube along its longitudinal axis is open on the section of the ring 1 at point 14.
• This groove is significantly wider than the thickness of the guide post, just to give the desired game; it is cut below the small ring 2, long enough so that, when the guide pin is in contact with the bottom of the groove 15, the bolt completely releases the opening 3 of the spring ring.
• the operating or actuating finger is placed practically at the head of the bolt: in this example, it is formed by a spherical tab 7, fixed by means of a small blade 9 of the same thickness and on the same line as the guide post.
• the user presses the tab 7 with his nail, pressing on the small blade 9 which slightly protrudes from the outside wall of the tube, this blade allows the nail to pass easily through the entry from the groove at point 14, the bolt compresses the spring, the guide pin 5 rests at the bottom of the groove at point 15 and the head of the bolt is flush with the opening of the tube at point 14: in this position, the nail is then in the extension of the cut 14, to hang the end ring 13 just slide it on the nail in the opening, release the pressure, the bolt takes its place and the spring ring is locked.
• the clasp shown in Figures 3 and 4 (on which the members identical to those of Figures 1 and 2 are designated by the same reference numbers increased by 20) is a variant consisting in that the bolt 24 is provided with a blade 25 is longer than the opening 23. This blade replaces the guide pin 5 and the small blade 9. It has the double effect of laterally guiding the bolt 24 and of transmitting the thrust received by the tab 27 placed substantially in blade head 25. With the bolt locked, this blade 25 rests against the tube at point 37, it is engaged in the groove 26 from point 34 to point 36. The operation is identical to that of the spring ring shown in FIGS. 1 and 2.
• the clasp shown in FIG. 5 is another variant: the guide pin 45 is placed at the tail end 44; the guide slot 46 is also displaced and is located on the longitudinal axis of the tubular ring of the small solid ring 42 from point 54 to point 55; this slot 46 is then arranged in the form of an independent light.
• the bolt completely clears the opening when the guide pin bears on the bottom of the groove at point 55.
• a small groove 47 is cut at the edge of the opening 56, on the outside of the tubular ring so that the small blade 49 which carries the tab can be embedded therein.
• the clasp shown in FIG. 6 is yet another variant: the guide pin 65 is at the tail end 64, but placed towards the inside of the tubular ring and the guide slot 66, also in the form of a lumen, is cut on the longitudinal axis inside the tubular ring from point 74 to point 75.
• the small groove 67 is identical to that of the previous variant.
• the diameter of the spring rings can be reduced, for example: a 5.5 mm spring ring according to the invention can replace a traditional spring ring from 6.5 to 7 mm.
• Figures 7 and 8 show a variant of the fer ⁇ moir of Figures 3 and 4.
• the significant length of the single slot 26 may mechanically weaken the ring toric and, under the influence of transverse forces in particular during actuations of the finger 27 during openings and closings, the edges of the slot 26 may be separated from one another.
• the previous fixed ring, consisting of a single wire is here replaced by a solid piece 82 having the general shape of an 8, the lower loop of which is open, with its edges 83 welded to the external walls of the O-ring. 81, on either side of the lips of the slot 26.
• the part 82 may have other conformations, insofar as the edges of the slot 26 are held firmly and prevented from moving apart. the other.

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Priority Applications (2)

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Publications (1)

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ID=9366424

Family Applications (1)

Country Status (6)

Cited By (2)

Citations (3)

• 1988
  • 1988-05-19 FR FR8806687A patent/FR2631663B1/fr not_active Expired - Fee Related
• 1989
  • 1989-05-17 AU AU36825/89A patent/AU3682589A/en not_active Abandoned
  • 1989-05-17 EP EP19890906139 patent/EP0418276B1/fr not_active Expired - Lifetime
  • 1989-05-17 WO PCT/FR1989/000233 patent/WO1989011233A1/fr active IP Right Grant
  • 1989-05-18 PT PT9060589A patent/PT90605B/pt not_active IP Right Cessation
  • 1989-05-19 ES ES8902390A patent/ES2013953A6/es not_active Expired - Lifetime

Patent Citations (3)

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