EP3961312A1 - Zubehörteil mit austauschbarem element für uhr oder schmuckstück - Google Patents

Zubehörteil mit austauschbarem element für uhr oder schmuckstück Download PDF

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Publication number
EP3961312A1
EP3961312A1 EP21191913.9A EP21191913A EP3961312A1 EP 3961312 A1 EP3961312 A1 EP 3961312A1 EP 21191913 A EP21191913 A EP 21191913A EP 3961312 A1 EP3961312 A1 EP 3961312A1
Authority
EP
European Patent Office
Prior art keywords
accessory
rod
outer ring
axial
locking
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP21191913.9A
Other languages
English (en)
French (fr)
Inventor
Benoit Bechet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cheval Freres Sas
Original Assignee
Cheval Freres Sas
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 Cheval Freres Sas filed Critical Cheval Freres Sas
Publication of EP3961312A1 publication Critical patent/EP3961312A1/de
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
    • G04B3/04—Rigidly-mounted keys, knobs or crowns
    • G04B3/041—Construction of crowns for rotating movement; connection with the winding stem; winding stems
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
    • G04B3/02—Removably-mounted keys or the like
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00—Cases
    • G04B37/08—Hermetic sealing of openings, joints, passages or slits
    • G04B37/10—Hermetic sealing of openings, joints, passages or slits of winding stems
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D1/00—Gripping, holding, or supporting devices
    • G04D1/0007—Gripping, holding, or supporting devices for assembly entirely by hand

Definitions

  • the present invention relates to an accessory for a timepiece or a piece of jewelry.
  • the invention relates more particularly to an accessory comprising an interchangeable or removable element, in particular a control device comprising an interchangeable crown.
  • a winding stem is provided to control the various functions of the movement and possibly for setting the time or winding the movement.
  • This winding stem is connected to an external gripping element called the crown, or winding crown, via a control stem.
  • the crown Since the crown is visible on the outside of the case, it has an aesthetic appearance. It is therefore useful to be able to easily change the crown without having to change the entire winding or time-setting mechanism.
  • pieces of jewelery it is also useful for pieces of jewelery to be able to easily change an element such as a cabochon or any other piece mounted at the end of a stem, as well as a clasp.
  • the invention aims to provide a new removable element solution, in particular a removable crown, which does not have the drawbacks of existing solutions.
  • the invention proposes an accessory for a timepiece or piece of jewelery comprising a rod which extends along a main axis and which is equipped with a removable element, the accessory comprising a locking device making it possible, in the locked position, to secure the removable element to the rod at least in translation and, in the unlocked position, to separate the removable element from the rod, characterized in that the removable element comprises a cap and a main tubular body which is fixed to the cap , in that the locking device comprises an outer ring sliding axially with respect to the main tubular body, between a locked position in which the outer ring controls at least one locking element so as to axially lock the removable element on the rod and an unlocked position in which the outer ring controls the locking element so as to release the removable element with respect to the t ig.
  • the invention also proposes a timepiece characterized in that it comprises an accessory according to one of the preceding characteristics.
  • the invention also proposes a tool for dismantling a removable element for an accessory according to one of the preceding characteristics, characterized in that it comprises an axial body which is provided at a free end with a radial plate, the plate radial comprising an axial return capable of coming into axial abutment against a portion of the outer ring in order to control it from its locked position to its unlocked position.
  • the dismantling tool comprises a control member that is axially movable with respect to the axial body between a rest position and a dismantling position in which a support finger integral with the control member comes to bear against The hairdo.
  • the figure 1 illustrates a timepiece 10 such as a wristwatch comprising a case 12 in which a timepiece movement 14 is arranged.
  • the timepiece movement 14 is here provided with a winding stem 16, or setting stem per hour, which extends along a main axis A1, from left to right considering the figure 1 .
  • a control device 20 is mounted on the free end of the winding stem 16.
  • This control device 20 comprises a control stem 22, which is for example screwed and glued on the winding stem 16, and a crown 24 which is removably mounted on the free end of the control stem 22 by means of a locking device 26.
  • the crown 24 is here in the form of a wheel provided with splines peripheral axial.
  • the locking device 26 is here configured to allow, in the locked position, to secure the crown 24 with the control rod 22 in translation and in rotation and, in the unlocked position, to separate the crown from the control rod 22.
  • control device 20 will now be described in more detail in relation to the figure 2 and 3 where it has been shown separated from the clock movement 14, in the locked position, with the main axis A1 vertical.
  • An internal/external orientation along the main axis A1 will be used, without limitation, which corresponds to an orientation from bottom to top considering the figure 2 and 3 .
  • a part will be qualified as internal when it is arranged on the side of the clockwork movement 14 and will be qualified as external when it is arranged on the side opposite to the clockwork movement 14.
  • the crown 24 here comprises a cap 28, which constitutes the outer envelope visible to the user of the crown 24, and a main tubular body 30 which is fixed inside the cap 28 and which is coaxial with the stem of the control 22.
  • the cap 28 has an inner bore 32 and the main tubular body 30 is inserted by force into this inner bore 32.
  • the main tubular body 30 could be screwed into the inner bore 32.
  • the main tubular body 30 here extends axially from the bottom of the inner bore 32 to the lower axial end of the cap 28.
  • the cap 28 also comprises an outer bore 34 of greater diameter than the inner bore 32, thus delimiting an annular space in which is slidably mounted an outer ring 36 belonging to the locking device 26.
  • the outer ring 36 is here biased in axial sliding downwards, that is to say towards the locked position, by a first elastic return element 38 which is interposed axially between the bottom of the outer bore 34 and an outer bearing surface 40 provided on the outer ring 36.
  • the outer ring 36 In the locked position, the outer ring 36 is here in axial abutment against an outer abutment surface 42 provided on the main tubular body 30.
  • the locking device 26 comprises three identical locking balls 44 which form locking elements, which are each received in a transverse opening 46 arranged in the main tubular body 30 and which, in the locked position, block axially the crown 24 on the control rod 22.
  • the movement of each locking ball 44 from its locked position to its unlocked position is controlled by the axial movement of the outer ring 36, as will be seen later.
  • each transverse opening 46 is of round section and of diameter substantially equal to the diameter of a locking ball 44. Indeed, each transverse opening 46 guides the corresponding locking ball 44 in transverse displacement, or radial relative to the main axis A1, between a locked transverse position, on the side of the main axis A1, and an unlocked transverse position, on the side opposite the main axis A1.
  • the locking balls 44 and the corresponding transverse openings 46 are distributed circumferentially in a regular manner around the main axis A1, that is to say here every 120 degrees.
  • each locking ball 44 is partially received in a complementary housing 48 provided on the control rod 22.
  • Each housing 48 here has a substantially semi-circular transverse profile so as to match the shape of the locking ball 44 corresponding.
  • the housing 48 is formed by a continuous peripheral annular groove, of semi-circular section, which is arranged around the periphery of the outer axial wall of the control rod 22.
  • each housing 48 would then consist of a hemispherical recess intended to be positioned opposite the corresponding transverse opening 46.
  • the outer ring 36 comprises a control surface 50 which, in the locked position, transversely retains each locking ball 44 in its housing 48.
  • the control surface 50 is here constituted by an annular axial surface which is arranged at the outer axial end 52 of the outer ring 36.
  • the outer ring 36 also comprises, in its inner axial wall, a receptacle 54 capable of receiving a portion of each locking ball 44 in the unlocked position.
  • the receptacle 54 is here constituted by a continuous annular groove, of rectangular section. Alternatively there could be as many receptacles 54 as locking balls 44.
  • the receptacle 54 is offset axially with respect to the control surface 50 so that, in the locked position, it is the control surface 50 which is located opposite the transverse openings 46 and, in the unlocked position, it is is the receptacle which is located opposite the transverse openings 46.
  • the crown 24 comprises an inner ring 56 which is mounted to slide in the outer axial section 58 of the main tubular body 30.
  • the inner ring 56 is configured to slide between a neutral position, which is represented on the picture 3 , where the inner ring 56 is offset axially upwards, relative to the transverse openings 46, and a retaining position, which is shown in the figure 6 , wherein an outer axial surface 60 of the ring interior 56 is located vis-à-vis the transverse openings 46 so as to retain the locking balls 44 on the interior side.
  • the inner ring 56 is biased in axial sliding downwards, that is to say towards its retaining position, by a second elastic return element 62 which is interposed axially between the bottom of the inner bore 32 and a surface support on the inner ring 56.
  • the inner ring 56 is retained axially in its retaining position by a shoulder 66 provided on the inner axial surface of the main tubular body 30.
  • the cap 28 comprises a generally cylindrical guide shaft 68 of circular section which is intended to be received in a complementary manner inside a bore, or barrel 70, arranged in the outer end section of the control 22 when the crown 24 is mounted on the control rod 22.
  • the guide shaft 68 here extends from the bottom of the inner bore 32 to an axial insertion end 72 which is offset axially towards the low relative to the lower axial end of the cap 28 so as to prevent any transverse pivoting of the crown 24 relative to the control rod 22 during assembly and disassembly of the crown 24 relative to the control rod 22 .
  • control rod 22 comprises a male splined section 74 which cooperates with a female splined section 76 of the main tubular body 30, when the crown 24 is locked on the control rod 22, to connect the crown 24 and the rod in rotation. command 22.
  • the housing 48 and the male splined section 74 are arranged on an outer end section 78 of the control rod 22 whose general diameter is greater than the diameter of the main section 80 of the control rod 22 .
  • sealing elements such as O-rings 82 are arranged on the main section 80 of the control rod 22 to ensure sealing against dust and water vis-à-vis the housing 12.
  • the user exerts an axial pressure upwards against the outer ring 36, and more precisely against its internal axial end surface 84 which is flush with the internal axial end of the main tubular body 30 and of the cap 28.
  • the user can pull the cap 28 upwards which causes the movement of the locking balls 44 towards their receptacle 54 and the separation of the crown 24 with respect to the control rod 22, as illustrated by the figure 5 and 6 .
  • the inner ring 56 slides simultaneously downwards, pushed by the second elastic return element 62, remaining in contact with the outer axial end surface 64 of the control rod 22. This allows the inner ring 56 to replace the housing 48 as the transverse retainer, on the inner side, for the locking balls 44.
  • the figure 6 represents the crown 24 above the control rod 22, in an initial position ready to be mounted, with the guide shaft 68 being partially inserted in the barrel 70. It is noted that, after the dismantling of the crown 24, the elements of the locking device 26 remain in the configuration shown on the figure 6 , the inner ring 56 bearing against the shoulder 66 of the main tubular body and the locking balls 44 being retained transversely, on one side by the outer axial surface 60 of the inner ring 56 and on the other side by the outer ring 36. It is also noted that the locking of the locking balls 44 here causes the axial locking of the outer ring 36 in its axial unlocking position.
  • the user From the initial position of the figure 6 , the user fits crown 24 into control rod 22 by inserting guide shaft 68 into barrel 70 until reaching the intermediate position illustrated by the figure 7 , which is identical to the figure 5 , in which the inner ring 56 comes into axial abutment against the control rod 22.
  • the user By maintaining a thrust on the crown 24 directed downwards, the user causes the axial displacement of the inner ring 56 towards the bottom of the inner bore 32, against the return force of the second elastic element of return 62, to a release position of the locking balls 44, illustrated by the figure 8 , wherein the housing 48 is transversely aligned with the transverse openings 46.
  • a dismantling tool 86 is provided.
  • the dismantling tool 86 comprises an axial body 88 provided at one free end with a radial insert 90 provided with an axial return 92 oriented towards the right, considering the figures, that is to say towards the dismantling tool 86.
  • the axial return 92 comprises a bearing surface which makes it possible to exert the required axial pressure against the outer ring 36, from the position locked shown on the picture 3 to reach the unlocked position shown on the figure 4 .
  • the disassembly tool 86 is equipped with a control member 94 which makes it possible to control the axial displacement of a finger of support 96 against the outer axial end of crown 24 to allow bearing on crown 24 and exert the required pressure on outer race 36 without having to pull axially on crown 24.
  • the control member 94 makes it possible to cause the support finger 96 to slide with respect to the axial body 88, against a third elastic return element 98.
  • the user begins by positioning the crown 24 in its extreme axial retracted position, to the right considering the figure 9 , which generally corresponds to the axial time-setting position of the winding stem 16. This then makes it possible to place the radial plate 90 between the case 12 and the crown 24, until the axial return 92 is axially opposite the outer ring 36. From this position, which is illustrated by the figure 9 , the user presses on the control member 94 so that the support finger 96 comes into axial support against the crown 24.
  • dismantling tool 86 here makes it possible to retain the crown 24 in the axial body 88 after dismantling. In addition, it allows gentle extraction of the crown 24, limiting the risks of exerting excessive traction on the crown 24 and the control rod 22 which could damage elements of the timepiece 10 such as the winding stem 16.
  • dismantling tool 86 could take other appropriate forms, for example without the control member 94.
  • other embodiments of the control device 20 are described according to the invention. For this, we will endeavor to describe mainly the technical elements which distinguish these embodiments from the first embodiment, without again describing all the parts in common. Elements identical or similar to those of the first embodiment will be designated by the same references.
  • the outer ring 36 is mounted in reverse with respect to the first embodiment. Indeed, instead of being slidably mounted in the lower face, or internal face, of the cap 28, it is slidably mounted in the upper face, or external face of the cap 28.
  • the outer ring 36 is here generally in the form of a substantially cylindrical push-button, which is slidably mounted in an axial opening 100 made in the outer face of the cap 28.
  • the outer ring 36 ends at its outer axial end. by a cabochon 102 which closes the crown 24 at the level of the axial opening 100.
  • the outer ring 36 comprises an outer annular portion 104 which is provided to come into axial bearing upwards against a shoulder surface of the cap 28 in the locked position.
  • the outer ring 36 is biased axially upwards by the first elastic return element 38 which is interposed axially between the outer annular portion 104 and an inner transverse portion 106 belonging to the main tubular body 30.
  • the main tubular body 30 is fixed to the cap 28 by fitting the internal transverse portion 106 into the outer bore 34 of the cap 28.
  • the guide shaft 68 is fixed to the main tubular body 30 by means of a tubular portion 108, made here in one piece with the guide shaft 68, which is force-fitted on the outer axial end section of the main tubular body 30.
  • the inner bore 32 is here arranged in said tubular portion 108.
  • the general operation of the locking device 26 according to the second embodiment remains similar to that of the first embodiment. From the locked position illustrated by the figure 11 , the user presses the lens 102 axially like a button until the outer ring 36 is placed in the unlocked position which is shown on the figure 12 . This makes it possible to release the locking balls 44 which retract into the receptacle 54, as illustrated by the figure 13 , thus allowing the crown 24 to be removed from the control rod 22.
  • this locking device 26 makes it possible to dispense with a dismantling tool.
  • Crown 24 is then mounted in the opposite direction, by placing crown 24 on control rod 22 by axial translation from top to bottom considering the figure 13 .
  • the third embodiment which is illustrated by the figures 14 to 16 , is very close to the first embodiment. Indeed, the outer ring 36 must here be moved axially upwards, as in the first embodiment, to perform the unlocking. However, instead of being accessible only from below the cap 28 as in the first embodiment, the outer ring 36 is accessible here directly through the diameter of the crown 24.
  • the outer ring 36 is arranged at the periphery of the cap 28 and in fact forms the outer part of the cap 28.
  • the outer ring 36 is no longer arranged in an outer bore.
  • the outer ring 36 is still slidably mounted on the main tubular body 30. It also comprises a first section additional fluted 110, at its outer axial end, which cooperates with a second additional fluted section 112 complementary arranged on the peripheral edge of the cap 28 to ensure the connection in rotation of the two parts.
  • the main tubular body 30 is still mounted by force in the inner bore 32 made in the cap 28.
  • the outer abutment surface 42 of the main tubular body 30 is here of a larger diameter than in the first embodiment since it has the same outer diameter as the outer ring 36.
  • This outer abutment surface 42 is arranged on a portion which forms a plate 114 provided to support the entire inner axial end of the outer ring 36 in locked position, as shown in figure 14 .
  • This plate 114 here forms the internal axial end of the crown 24.
  • the outer axial wall 116 of the outer ring 36 here forms the gripping part of the crown 24 which allows the user to rotate the crown 24 for winding the clock movement or resetting the time.
  • This outer axial wall 116 can therefore be splined or knurled like the cap 28 of the first embodiment.
  • This outer axial wall 116 of the outer ring 36 here comprises a peripheral groove 118 which facilitates the gripping of the user in the direction of pulling upwards for an unlocking operation.
  • the general operating principle of the third embodiment remains substantially the same as that of the first and second embodiments.
  • each of the two elastic return elements 38, 62 consists of a helical compression spring.
  • each helical compression spring could be replaced by several helical compression springs, of smaller diameters, which would be distributed regularly over the periphery of the locking device 26 and received in appropriate housings.
  • the timepiece is replaced by a piece of jewelry 210 which is equipped with an accessory 220 provided with a removable element 224 mounted at the end of a rod 222 equivalent to the control rod 22 of the first modes of implementation.
  • the piece of jewelry 210 can for example be a bracelet, a necklace, a ring, an earring, a cufflink.
  • the accessory 220 can for example be a bracelet link, a clasp, or a decorative element of the piece of jewelry 210.
  • the removable element 224 and the rod 222 are made here in a manner similar to the arrangement of the first embodiment. The differences are mainly the compactness which is allowed because it is not necessary to provide a rotational connection of the rod 222 with the removable element 224, in particular its cap 228. Indeed, the removable element 224 does not constitute a winding crown and does not have the function of driving in rotation.
  • the removable element 224 can serve as a closing element on a clasp or on a cufflink, for example. It can be free rotation with respect to the rod 222, insofar as the locking device 226 allows locking in translation on the rod 22.
  • the locking device 226 therefore comprises here an outer locking ring 236 as in the first embodiment.
  • the cap 228 also includes a main tubular body 230 on which the outer ring 236 is slidably mounted to form the locking device 226.
  • the operation of the locking device 226 according to the fourth embodiment is identical to the operation described with reference to the first embodiment.
  • the piece of jewelry 210 could also be equipped with an arrangement according to the second or the third embodiment, with different variants in the shape of the cap 228 and in the shape of the removable element 224, without departing from the framework of the invention.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
EP21191913.9A 2020-08-28 2021-08-18 Zubehörteil mit austauschbarem element für uhr oder schmuckstück Pending EP3961312A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2008790A FR3113744B1 (fr) 2020-08-28 2020-08-28 Dispositif de commande à couronne interchangeable pour pièce d’horlogerie

Publications (1)

Publication Number Publication Date
EP3961312A1 true EP3961312A1 (de) 2022-03-02

Family

ID=73038243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21191913.9A Pending EP3961312A1 (de) 2020-08-28 2021-08-18 Zubehörteil mit austauschbarem element für uhr oder schmuckstück

Country Status (2)

Country Link
EP (1) EP3961312A1 (de)
FR (1) FR3113744B1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR935237A (fr) * 1946-10-18 1948-06-14 Procédé et dispositifs pour l'immobilisation d'un organe mécanique par une goupille
EP2477079A2 (de) * 2010-12-22 2012-07-18 Guenat SA Montres Valgine Steuervorrichtung
CH714548A1 (fr) * 2018-01-12 2019-07-15 Richemont Int Sa Dispositif de commande pour mouvement d'horlogerie.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR935237A (fr) * 1946-10-18 1948-06-14 Procédé et dispositifs pour l'immobilisation d'un organe mécanique par une goupille
EP2477079A2 (de) * 2010-12-22 2012-07-18 Guenat SA Montres Valgine Steuervorrichtung
CH714548A1 (fr) * 2018-01-12 2019-07-15 Richemont Int Sa Dispositif de commande pour mouvement d'horlogerie.

Also Published As

Publication number Publication date
FR3113744B1 (fr) 2023-04-21
FR3113744A1 (fr) 2022-03-04

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