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EP4123391B1 - Uhrenkomponente zur befestigung auf einer welle und verfahren - Google Patents

Uhrenkomponente zur befestigung auf einer welle und verfahren Download PDF

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Publication number
EP4123391B1
EP4123391B1 EP21187238.7A EP21187238A EP4123391B1 EP 4123391 B1 EP4123391 B1 EP 4123391B1 EP 21187238 A EP21187238 A EP 21187238A EP 4123391 B1 EP4123391 B1 EP 4123391B1
Authority
EP
European Patent Office
Prior art keywords
arbor
passage
timepiece component
timepiece
component
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.)
Active
Application number
EP21187238.7A
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English (en)
French (fr)
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EP4123391A1 (de
Inventor
Stéphane Berthoud
Julien GATINET
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.)
Dubois and Depraz SA
Original Assignee
Dubois and Depraz SA
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 Dubois and Depraz SA filed Critical Dubois and Depraz SA
Priority to EP21187238.7A priority Critical patent/EP4123391B1/de
Publication of EP4123391A1 publication Critical patent/EP4123391A1/de
Application granted granted Critical
Publication of EP4123391B1 publication Critical patent/EP4123391B1/de
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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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/021—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft
    • 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
    • G04B35/00—Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears

Definitions

  • the present invention relates to a watch component chosen from a toothed wheel, a display disc (or indicator disc) and a cam, more precisely the fixing of such a watch component on a shaft. It also relates to a watch assembly comprising such a watch component fixed on a shaft, a watch device comprising such a watch assembly and at least one other watch component and a method of assembling such a watch component with a shaft.
  • Gear wheels or display discs are usually fixed to their shaft by traditional driving, that is, by plastic deformation of their opening. Alternatively, they can be fixed to their axis by gluing, riveting or brazing. These types of assemblies have the disadvantage of being irreversible.
  • the European patent application EP 1 708 045 describes an alternative method of fixing a watch wheel to an axle using an elastic type of driving.
  • the wheel described in this patent application has a circular central hole whose inner surface is bordered by elastic arms undergoing only elastic deformation when the axle is driven into the hole. This type of structure is not entirely satisfactory because it only provides a weak hold.
  • Devices are also known for fixing watch components together, in particular a wheel on its axle, in which an intermediate piece is used for this purpose, as in the document EP2743782 .
  • Other documents such as the EP2977829 disclose devices for braking a wheel, the wheel comprising an elastic arm arranged to cooperate with notches of said wheel making it possible to adjust a clearance necessary for braking.
  • An aim of the present invention is to propose a watch component chosen from a toothed wheel, a display disc and a cam, intended to be fixed on a shaft so as to be integral in rotation and in translation with this shaft. during its operation in a watch, said component at least partially overcoming the aforementioned drawbacks.
  • the present invention relates to a watch component chosen from a toothed wheel, a display disc and a cam comprising a passage intended to receive a shaft.
  • the watch component comprises a retaining element and a locking arm capable of moving between a rest position and a locked position in which it cooperates with said retaining element.
  • the locking arm When moving from its rest position to its locked position, the locking arm is intended to clamp the arbor against the wall of said passage so as to make it integral with said watch component and, once in its locked position, to maintain it in this state.
  • Such a locking arm makes it possible to obtain a strong clamping force and therefore a good hold while retaining the possibility of detaching the watch component from the arbor.
  • the locking arm of the component according to the invention is intended to clamp the shaft against the wall of said passage either directly by pressing on the shaft, or indirectly by pressing on the wall of the passage intended to receive the shaft.
  • the passage is cylindrical. It is typically central.
  • the wall of said passage is configured to deform elastically in a plane perpendicular to the axis of the passage, and the locking arm is arranged so that, when it moves from its rest position to its locked position, it tightens said passage and, once in its locked position, it maintains it in a tightened configuration.
  • the locking arm When moving from its rest position to its locked position, the locking arm typically presses on a portion, typically a bulge, of the outer surface of said wall.
  • the locking arm when moving from its rest position to its locked position, the locking arm is intended to press directly on the shaft to clamp it against said wall.
  • the locking arm according to the invention is typically an elastic arm but it can also be a rigid arm articulated, typically by means of a pivot.
  • this arm is arched. It typically extends substantially concentrically to the inner surface of the passage.
  • shaft designates either a shaft itself or a barrel.
  • this term designates any cylindrical or truncated cone-shaped part or piece, solid or hollow, intended to pivot in a watch movement.
  • the clamping force exerted on the shaft is low or zero has the advantage of allowing the adjustment of the relative position of the shaft with respect to the watch component according to the invention, angularly and/or axially, typically for their indexing, before locking their relative position by means of the locking arm. Having a low clamping force compared to zero force before locking the locking arm allows for more precise adjustment. This also makes it possible to avoid the disturbance of the relative position of the shaft with respect to the watch component to which it is fixed at the time of locking the locking arm.
  • the invention also relates to a watch assembly comprising such a watch component and a shaft passing through said cylindrical passage, said component and said shaft being integral with each other both axially and in rotation.
  • the shaft of the assembly according to the invention is a barrel of a toothed wheel; its watch component is typically a display disc.
  • the locking arm is considered in the locked position.
  • a watch device comprises such a watch assembly and at least one other watch component crossed by said shaft in which the watch component of said assembly ensures the axial maintenance of said at least one other watch component on the shaft.
  • This method typically comprises an additional step c' between steps c and d consisting of adjusting the relative position of the shaft with respect to the component by pivoting and/or sliding around and/or along said axis.
  • the invention also relates to a timepiece such as a wristwatch or a pocket watch comprising such a timepiece assembly.
  • FIGS. 1a and 1b illustrate a display disc 1 according to a first embodiment of the invention. It typically carries a graduation (not shown) corresponding to the tens digits of a date display and is intended to be mounted on a shaft.
  • the display disc 1 comprises a central and cylindrical passage 2 of axis A, intended to receive said shaft.
  • the wall 3 delimiting the cylindrical passage 2 is configured to be able to deform elastically in a plane perpendicular to the axis A while receiving the shaft and to be able to then exert an elastic clamping force on the shaft. This elastic deformation takes place over at least part of the circumference of said wall 3.
  • the display disc 1 further comprises a locking arm 4 and a retaining element 6.
  • the locking arm 4 is able to move between a first position called the “rest position”, illustrated in Figure 1a , and a second position called the “locked position,” shown in Figure 1b , in which a hook 5 which it carries at its free end cooperates with the retaining element 6.
  • the locking arm 4 When moving from its rest position to its locked position, the locking arm 4 tightens the cylindrical passage 2 by pressure on the outer surface of its wall 3, in particular on a bulge 8 which it comprises. It tends to reduce the diameter of the cylindrical passage 2.
  • the section of the inner surface of the cylindrical passage 2 is C-shaped, it typically comprises two ends 3a and 3b intended to approach each other when locking the locking arm 4 to tighten the cylindrical passage 2.
  • the inner wall of the cylindrical passage 2 defines an arc of a circle with an angle ⁇ of approximately 340°.
  • the inner surface of the cylindrical passage 2 may be smooth as shown in the figures or include hollows or bumps.
  • the angle ⁇ over which this arc of a circle extends is typically greater than 270°, preferably greater than 300°, more preferably greater than 330°.
  • the locking arm 4 holds the cylindrical passage 2 in a tightened configuration, as shown in Figure 1b .
  • the locking arm 4 is a resilient arm. Alternatively, it could be rigid and articulated, typically by means of a pivot. This arm 4 is arched and extends concentrically to the inner surface of the cylindrical passage 2.
  • the locking arm 4 comprises, near its free end, a hole 7 intended to receive a tool facilitating the watchmaker's assembly operations.
  • FIGS. 2a to 3b illustrate a part of a date display device 100 comprising a first display disc such as the display disc 1, a toothed pinion 9 comprising a barrel 10 and a toothed wheel 11 of which the barrel 12 is integral in rotation with a second display disc 13.
  • the second display disc 13 typically carries a graduation (not represented) corresponding to the unit digits of a date display.
  • the barrel 12 comprises a cylindrical through bore through which the barrel 10 of the toothed pinion 9 passes.
  • the barrel 10 is intended to pivot inside said bore.
  • the device 100 is typically mounted as follows: the second display disc 13 is mounted on the barrel 12 of the toothed wheel 11 and made integral with the latter.
  • the barrel 10 is then inserted into the cylindrical bore passing through the toothed wheel 11 and then the first display disc 1 is mounted on the barrel 10.
  • its cylindrical passage 2 is aligned with the axis A of the barrel 10, then it is moved along this axis until the barrel 10 passes through the cylindrical passage 2.
  • the wall 3 of the cylindrical passage 2 deforms elastically to allow the barrel 10 to pass. In this position, illustrated in Figures 2a And 3a , the display disc 1 and the barrel 10 are fixed relative to each other.
  • the elastic return force exerted by the wall 3 on the barrel 10 is however sufficiently weak so that the watchmaker can separate them in order to position them as desired (indexing in particular). Once the positioning has been achieved, the watchmaker typically inserts a tool into the hole 7 in order to lock the locking arm 4 by pulling the hook 5 behind the retaining element 6.
  • the device thus obtained is illustrated in Figures 2b And 3b In this device, the first display disc 1 and the pinion 9 form a set of two parts fixed relative to each other axially and in rotation and capable of remaining so during its use in a watch mechanism.
  • the first display disc 1 here plays the role of axially holding the display disc 13 and the unit wheel 11.
  • the device 100 could comprise a barrel 10 whose diameter to be inserted into the cylindrical passage 2 would be slightly smaller so that the wall 3 would not undergo any elastic deformation when the barrel 10 is inserted into the cylindrical passage 2. The barrel 10 would then be free to rotate and translate until the arm 4 is brought into the locking position.
  • the outer contour of the barrel 10 can advantageously comprise an inclined plane 14 to reinforce the axial retention of the first display disc 1 on the barrel 10.
  • the watchmaker who would like to separate the display disc 1 from the barrel 10 would only have to unlock the locking arm 4 by separating its hook 5 from the retaining element 6 and then exert a force along the axis A on the disc 1 or on the pinion 9 (or its barrel 10) to remove the barrel 10 from the cylindrical passage 2.
  • the cylindrical passage 2 would then resume a configuration identical to that preceding its assembly with the pinion 9. It is said that the attachment of the disc 1 to the barrel 10 is reversible.
  • FIGS. 4a and 4b illustrate a part of a display device 200 comprising a first display disc 201 according to a second embodiment of the invention mounted on the barrel 210 of a pinion.
  • the display disc 201 comprises a central passage intended to receive the barrel 210.
  • the members or parts of members bearing the references 201, 203, 204, 205, 206, 207, 210 correspond respectively to the members or parts of members bearing the references 1, 3, 4, 5, 6, 7, 10 of the device according to the first embodiment of the invention.
  • the display disc 201 differs from the display disc 1 according to the first embodiment of the invention in that its locking arm 204 is intended to act directly on the shaft 210 during locking.
  • the inner central passage surface comprises two circular arcs, one of which is carried by the locking arm 204.
  • the locking arm 204 in fact comprises a part 204a intended to bear against the shaft 210 when it passes from its rest position to its locked position.
  • a display disk (not shown) according to a third embodiment of the invention differs from the disk according to the second embodiment of the invention in that the inner surface of its central passage is delimited by at least a first wall, the rigid inner contour of which is fixed relative to the body of the disk and intended to be in contact with the shaft when the locking arm is in the locked position and at least a second wall part, similar to the single wall according to the first embodiment of the invention, capable of elastically deforming and intended to be tightened against the shaft to fix it axially and in rotation relative to the disk when the locking arm is locked, and to be maintained in this tightened configuration by the locking arm when the latter is in the locked position.
  • the passage intended to receive the shaft is typically part of a recess in which the locking arm is also located.
  • the watch component according to the present invention has many advantages over those of the prior art. It has a structure allowing it to be easily and securely fixed to a shaft. It is designed so that the adjustment of its relative position with respect to the shaft is as simple and precise as possible. It also allows reversible fixing.
  • the shape of the organs in particular the shape of the wall 3 bordering the cylindrical passage 2 or that of the locking arm 4 can vary infinitely as long as their functions are ensured.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Gears, Cams (AREA)

Claims (12)

  1. Uhrenkomponente (1), die ausgewählt ist aus einem Zahnrad, einer Anzeigescheibe und einer Kurvenscheibe, wobei die Uhrenkomponente (1) einen Durchgang (2) umfasst, der dazu bestimmt ist, eine Welle (10) aufzunehmen, und dadurch gekennzeichnet ist, dass sie ein Rückhalteelement (6) und einen Verriegelungsarm (4) umfasst, der geeignet ist, sich zwischen einer Ruheposition und einer verriegelten Position zu verlagern, in der er mit dem Rückhalteelement (6) zusammenwirkt, und dadurch, dass der Verriegelungsarm (4) dazu bestimmt ist, bei seiner Verlagerung von seiner Ruheposition hin zu seiner verriegelten Position die Welle (10) derart gegen die Wand (3) des Durchgangs (2) zu klemmen, dass sie fest mit der Uhrenkomponente (1) verbunden wird, und sie, wenn er sich in seiner verriegelten Position befindet, in diesem Zustand zu halten.
  2. Uhrenkomponente (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Durchgang (2) zylindrisch ist.
  3. Uhrenkomponente (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass ihre Wand (3) dazu ausgestaltet ist, sich elastisch in einer Ebene senkrecht zur Achse (A) des Durchgangs (2) zu verformen, und dadurch, dass ihr Verriegelungsarm (4) derart ausgestaltet ist, dass er bei seiner Verlagerung von seiner Ruheposition hin zu seiner verriegelten Position den Durchgang (2) verengt und, wenn er sich in seiner verriegelten Position befindet, ihn in einer verengten Ausgestaltung hält.
  4. Uhrenkomponente (1) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Verriegelungsarm (4) bei seinem Übergang von seiner Ruheposition zu seiner verriegelten Position auf einem Teil der Außenfläche der Wand (3) aufliegt.
  5. Uhrenkomponente (1) nach Anspruch 4, dadurch gekennzeichnet, dass die Außenfläche der Wand (3) eine Ausbauchung (8) umfasst.
  6. Uhrenkomponente (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Verriegelungsarm (4) dazu bestimmt ist, bei seiner Verlagerung von seiner Ruheposition hin zu seiner verriegelten Position direkt auf der Welle (10) aufzuliegen, um sie gegen die Wand (3) zu klemmen.
  7. Uhrenanordnung, die eine Uhrenkomponente (1) nach einem der Ansprüche 1 bis 6 und eine Welle (10) umfasst, die den Durchgang (2) durchquert, wobei die Komponente (1) und die Welle (10) sowohl axial als auch drehbar fest miteinander verbunden sind.
  8. Anordnung nach Anspruch 7, dadurch gekennzeichnet, dass die Welle ein Rohr (10) eines Zahnrads ist, und dadurch, dass die Uhrenkomponente eine Anzeigescheibe (1) ist.
  9. Uhrenvorrichtung (100), dadurch gekennzeichnet, dass sie eine Anordnung nach Anspruch 7 oder 8 und mindestens eine andere Uhrenkomponente umfasst, die von der Welle durchquert wird, wobei die Uhrenkomponente (1) der Uhrenanordnung den axialen Halt der mindestens einen anderen Uhrenkomponente an der Welle (10) sicherstellt.
  10. Verfahren zum Zusammenbauen einer Uhrenkomponente (1) nach einem der Ansprüche 1 bis 6 mit einer Welle (10), dadurch gekennzeichnet, dass es die folgenden Schritte umfasst:
    a. Bereitstellen einer Uhrenkomponente (1) nach einem der Ansprüche 1 bis 6 und einer Welle (10);
    b. Positionieren der Welle (10) und der Uhrenkomponente (1), derart dass die Welle (10) sich in der Achse (A) des Durchgangs (2) befindet;
    c. Verlagern eines der Welle (10) oder der Uhrenkomponente (1) entlang der Achse (A), bis die Welle (10) sich in dem Durchgang (2) befindet;
    d. Verlagern des Verriegelungsarms (4) der Uhrenkomponente (1) von seiner Ruheposition hin zu seiner verriegelten Position.
  11. Verfahren zum Zusammenbauen nach Anspruch 10, dadurch gekennzeichnet, dass es einen zusätzlichen Schritt c' zwischen den Schritten c und d umfasst, der darin besteht, die relative Position der Welle (10) in Bezug auf die Uhrenkomponente (1) durch Schwenken und/oder Gleiten um und/oder entlang der Achse (A) des Durchgangs (2) einzustellen.
  12. Uhr, wie beispielsweise eine Armbanduhr oder eine Taschenuhr, dadurch gekennzeichnet, dass sie eine Uhrenanordnung nach Anspruch 7 oder 8 umfasst.
EP21187238.7A 2021-07-22 2021-07-22 Uhrenkomponente zur befestigung auf einer welle und verfahren Active EP4123391B1 (de)

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Application Number Priority Date Filing Date Title
EP21187238.7A EP4123391B1 (de) 2021-07-22 2021-07-22 Uhrenkomponente zur befestigung auf einer welle und verfahren

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Application Number Priority Date Filing Date Title
EP21187238.7A EP4123391B1 (de) 2021-07-22 2021-07-22 Uhrenkomponente zur befestigung auf einer welle und verfahren

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EP4123391A1 EP4123391A1 (de) 2023-01-25
EP4123391B1 true EP4123391B1 (de) 2025-04-30

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1708045A3 (de) 2005-03-22 2009-01-07 Patek, Philippe SA Befestigung eines Uhrrads an einer Spindel
EP2482143A1 (de) * 2011-01-26 2012-08-01 Nivarox-FAR S.A. Zusammenbau mit Sperrklinkenblockierung
EP2743782B1 (de) * 2012-12-11 2016-02-03 Nivarox-FAR S.A. Vorrichtung zum zusammenbau von elastischen armen durch verformung
CH709920A2 (fr) * 2014-07-24 2016-01-29 Eta Sa Manufacture Horlogère Suisse Ensemble à mobile de freinage d'horlogerie.

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