EP4375760A1 - Befestigungselement für eine uhr - Google Patents

Befestigungselement für eine uhr Download PDF

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Publication number
EP4375760A1
EP4375760A1 EP22209690.1A EP22209690A EP4375760A1 EP 4375760 A1 EP4375760 A1 EP 4375760A1 EP 22209690 A EP22209690 A EP 22209690A EP 4375760 A1 EP4375760 A1 EP 4375760A1
Authority
EP
European Patent Office
Prior art keywords
fixing element
elastic fixing
elastic
assembly
support element
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
EP22209690.1A
Other languages
English (en)
French (fr)
Inventor
Ivan Hernandez
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.)
Nivarox Far SA
Original Assignee
Nivarox Far 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 Nivarox Far SA filed Critical Nivarox Far SA
Priority to EP22209690.1A priority Critical patent/EP4375760A1/de
Priority to JP2023184144A priority patent/JP2024076968A/ja
Priority to US18/498,211 priority patent/US20240176297A1/en
Priority to CN202311592865.7A priority patent/CN118092116A/zh
Publication of EP4375760A1 publication Critical patent/EP4375760A1/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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G04B17/34—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring onto the balance
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G04B17/34—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring onto the balance
    • G04B17/345—Details of the spiral roll
    • 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
    • G04B13/022—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft with parts made of hard material, e.g. silicon, diamond, sapphire, quartz and the like
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0035—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the regulating mechanism
    • G04D3/0038—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the regulating mechanism for balances

Definitions

  • the present invention relates to an elastic fixing element for watchmaking, more particularly an element making it possible to hold a watchmaking component on a fixed or movable support element, such as an axis, by elastic tightening of the support element. .
  • Such elastic fixing elements are known in the state of the art and can be in the form of a ferrule for fixing the inner end of a hairspring to the axis of a balance wheel, for example, and a plier for fixing the outer end of a hairspring to a piton.
  • the present invention aims to further improve these elastic fixing elements by making them capable of exerting a greater clamping force and/or deforming more.
  • the aim of the present invention is to overcome all or part of the drawbacks cited above by proposing an elastic fixing element which has a significant holding torque, in particular to facilitate/simplify the operations of mounting an assembly of a set of elements.
  • elastic fixation - watchmaking component with a support element as well as ensuring sufficient hold to guarantee maintaining position in the plane and guaranteeing its angular position during the life of the component.
  • the invention relates to an elastic fixing element for holding a watch component on a support element, comprising an opening whose contour comprises at least four contact zones allowing the reception and tightening of the support element in said opening, said contact zones each being included on an internal face of a deformable portion provided with a through hole of the fixing element.
  • the invention also relates to an elastic fixing element - timepiece component assembly for a watch movement of a timepiece comprising such a fixing element.
  • this assembly is in one piece.
  • the invention also relates to an assembly for a watch movement of a timepiece comprising such an elastic fixing element - timepiece component assembly, said assembly being fixed to a support element.
  • the invention also relates to a watch movement comprising at least one such assembly.
  • the invention also relates to a timepiece comprising such a clockwork movement.
  • THE figures 1 to 3 present three embodiments of the elastic fixing element 1a, 1b, 1c for fixing a timepiece component 2 on a support element 3.
  • the elastic fixing element 1a, 1b, 1c may comprise four, five or six contact zones 13 allowing the reception and tightening of the support element in an opening 5 of said fixing element 1a, 1b, 1c.
  • the elastic fixing element 1a, 1b, 1c can be a ferrule for fixing the timepiece component 2 such as a hairspring to a support element 3 such as a balance shaft.
  • this fixing element 1a, 1b, 1c can be included in an assembly 120 elastic fixing element - watchmaking component visible on the Figure 4 and which is intended to be arranged in a watch movement 110 of a timepiece 100.
  • Such an assembly 120 can be a one-piece part made of a material so-called “fragile” preferably a micro-machinable material.
  • a material may include silicon, quartz, corundum or even ceramic.
  • this fixing element 1a, 1b, 1c has a thickness of between 50 and 150 ⁇ m. Such a thickness is preferably of the order of 100 ⁇ m.
  • the elastic fixing element 1a, 1b, 1c can be made of such a so-called “fragile” material, the watchmaking component 2 then being made of another material.
  • This assembly 120 can be part of an assembly 130 for the watch movement 110, by being fixed to the support element 3 for example by elastic clamping. It should be noted that this assembly 130 was designed for applications in the watchmaking field. However, the invention can be perfectly implemented in other fields such as aeronautics, jewelry, or even automobiles.
  • Such a fixing element 1a, 1b, 1c comprises an opening 5 also called “ central opening ” in which the support element 3 is intended to be inserted.
  • This opening 5 defines a volume in the fixing element 1a, 1b, 1c which is lower than that of a connecting part of one end of the support element 3 which is intended to be arranged there.
  • this connecting part has a circular cross section and comprises in whole or in part contact portions defined on a peripheral wall of the support element 3.
  • Such an element 1a, 1b, 1c also comprises an upper face and a lower face 12, preferably flat, included respectively in first and second planes P1 and P2 visible on the figures 1 , 2 And 3 which are parallel to each other.
  • This element 1a, 1b, 1c also includes internal and external peripheral walls 9a, 9b which connect the upper and lower faces 12 together.
  • the external peripheral wall 9b comprises a surface which externally delimits the contour of the fixing element 1a, 1b, 1c.
  • This peripheral wall 9b gives this element 1a, 1b, 1c an essentially polygonal shape of the octagonal type on the figure 1 , decagonal on the figure 2 and dodecagonal on the Figure 3 .
  • Concerning the internal peripheral wall 9a it comprises a surface which delimits the contour of an opening 5 of this fixing element 1a, 1b, 1c. As we will see later, this internal peripheral wall 9a comprises contact zones 13 intended to come to bear on the support element 3.
  • transverse dimension of the external peripheral wall 9b or of the internal peripheral wall 9a which is parallel to an axis of revolution A of the fixing element 1a, 1b, 1c corresponds here to the thickness of this element 1a, 1b, 1c.
  • This fixing element 1a, 1b, 1c comprises a body provided with at least four deformable portions 7 also called “flexible portions” or “elastic portions”. Each deformable portion 7 is configured to return to its original shape after having been deformed. In other words, these portions are reversibly deformable portions 6.
  • the body of this element 1a, 1b, 1c is rigid, or essentially rigid, with the exception of the deformable portions 7 which it comprises. In other words, this body comprises deformable portions 7 and rigid portions 6.
  • rigid portions 6 is meant portions 6 which resist pressure or deformation, i.e. non-deformable portions.
  • the rigid portions 6 are configured to be stressed essentially in traction. In this configuration, these rigid portions 6 resist pressure or tensile deformation.
  • each deformable portion 7 is arranged in the body of said element 1a, 1b, 1c at an equal distance from each of the other deformable portions 7 which are arranged in its direct neighborhood, or closest neighborhood, in said body.
  • each deformable portion 7 extends between the internal and external peripheral walls 9a, 9b of the body of the element 1a, 1b, 1c. It will be noted that such deformable portions 7 are similar to each other. In this element 1, these portions 7 form a protrusion in the internal peripheral wall 9a of the body of the element 1a, 1b, 1c which extends towards the center O of the fixing element 1a, 1b, 1c.
  • Each deformable portion 7 comprises a reception region 8a, two connection regions 8b and an external region 8c. These regions 8a, 8b, 8c together delimit the perimeter of a through hole 6 of this portion 7.
  • This contact zone 13 comprises a substantially hollow or substantially concave part in which two support zones are included. These two support zones are able to cooperate with the corresponding convex contact portion of the support element 3. Such support zones are defined/included in the surface of this contact zone 13 by extending substantially over all or part of the thickness of the attachment part 1. In addition, these support zones are flat, each comprising a surface which is entirely or partly flat. In the contact zone 13, the two support zones are respectively included in different planes together forming an obtuse angle. These two support zones are disjointed by being spaced from one another. In other words, the contact zone 13 comprises a connection zone of the two support zones. This connection zone preferably has a rounded shape.
  • These support zones are intended in particular to cooperate with the contact portions according to a contact configuration of the plane-convex or even plane-cylinder type if we take into account the cylindrical shape of the support element 3.
  • the flat surface of each support zone cooperates with the corresponding contact portion of convex shape of the support element 3.
  • this convex shape of each contact portion is appreciated relative to the flat surface of each zone of corresponding support with regard to which this portion is arranged.
  • this flat surface of each support zone forms a plane tangent to the diameter of the support element 3. In other words, the flat surface is perpendicular to the diameter and therefore to the radius of the support element.
  • each contact zone 13 of the attachment part 1 allows to apply a contact pressure between this attachment part 1 and the support element 3 during the creation of a mechanical connection between them, while significantly reducing the intensity of the stresses at the level of these support zones and the corresponding contact portions of the support element 3 during the assembly and/or fixing of this attachment part 1 with the support element 3, which constraints being likely to damage the attachment part 1 by the appearance of breaks/breakages or even cracks.
  • this contact zone 13 in the internal face 8 of each deformable portion 7 makes it possible to create a contact pressure between this element 1a, 1b, 1c and the support element 3 during the production of a mechanical connection between them, while significantly reducing the intensity of the stresses at the level of this contact zone 13 and the corresponding contact region of the support element 3 during assembly and/or the fixing of this element 1a, 1b, 1c with the support element 3, which constraints being likely to damage said element 1a, 1b, 1c by the appearance of breaks/breakages or even cracks.
  • these deformable portions 7 therefore include the only contact zones 13 of the element 1a, 1b, 1c with the support element 3 which can be defined in all or part of the internal faces 8 of these portions 7.
  • these contact zones 13 are at least four in number and can participate in achieving precise centering of the timepiece component 2, for example a hairspring, in the timepiece movement 110.
  • the external region 8c is included between the external peripheral wall 9b of the element 1a, 1b, 1c and part of the periphery of the through hole 4 while also being connected to the two connection regions 8b.
  • Concerning these two connection regions 8b they are each included between one end of a rigid portion 6, one part of the external peripheral wall 9b and part of the periphery of the through hole. Note that these two connection regions also connect the reception regions 8a and external 8c to each other.
  • the deformable portion 7 comprises the through hole 4, also called obviously, and which is defined in the thickness of this element 1a, 1b, 1c.
  • This through hole 4 opens into both the upper and lower faces 10 of the element 1a, 1b, 1c.
  • This through hole 4 opens at one end into the upper face of the deformable portion 7 and at another end into the lower face 10 of this portion 7.
  • This hole 4 extends in the direction of the axis of revolution A and this, from the upper face to the lower face 10 or vice versa. In other words, this hole 4 connects these two faces 10 together.
  • This through hole 4 defines a volume of void or even a volume of void of material or absence of material. We therefore understand that this volume corresponds to a variable or configurable volume.
  • This volume comprises an open enclosure delimited by a peripheral wall of this hole 4.
  • Such a through hole 4 represents approximately between 20 and 80 percent of the body of the deformable portion 7.
  • this through hole 4 represents 30 percent of this body.
  • each deformable portion 7 is configured to modify the volume defined by this through hole 4 when this portion 7 is placed under stress by the support element 3.
  • the rigid portions 6 extend between the internal and external peripheral walls 9a, 9b of the body of the element 1a, 1b, 1c.
  • These rigid portions 6 preferably have an elongated shape.
  • each rigid portion extends longitudinally between two deformable portions 7 to which it is connected.
  • each rigid portion 6 is directly connected at each of its two opposite ends to two deformable portions 7.
  • the deformable portions 7 and rigid portions 6 are arranged successively and alternately in the fixing element 1a, 1b, 1c.
  • Each rigid portion 6 is connected to two different deformable portions 7, which deformable portions 7 are connected “directly” to the other rigid portions 6 of the element 1a, 1b, 1c.
  • the rigid portions 6 are here non-deformable or almost non-deformable and play the role of stiffening elements of the fixing element 1a, 1b, 1c.
  • each deformable portion 7 the reception region 8a, the two connection regions 8b and the external region 8c bound/surround/delimit the through hole 4. More precisely, these regions 8a to 8c are configured to be deformed by different ways since they are constrained by the insertion of the support element 3 in the opening 5 of the element 1a, 1b, 1c. Indeed, for each deformable portion 7 each of these regions 8a to 8c has a deformation coefficient C rr , C rl , C re whose value decreases as this region 8a, 8b, 8c is moved away from the contact zone 13 of the reception region 8a.
  • the deformation coefficient C rr also called the average deformation coefficient C rr of the reception region 8 has a high value or greater than the value of the coefficient C rl of the two connection regions 8b and that of the coefficient C re of the outer region 8c.
  • the coefficients C rl of the two connection regions 8b have similar or substantially similar values which are higher than that of the coefficient C re of the external region 8c.
  • the relationship between these average deformation coefficients C rr , C rl , and C re of these regions 8a, 8b, 8c can be defined according to the following mathematical formula: VS rr > VS rl > VS D
  • these rigid and deformable portions 6, 7 essentially make it possible to produce a fixing of the elastic clamping type of the support element 3 in the opening 5 formed in this fixing element 1a, 1b, 1c which is defined by the internal peripheral wall 9a of this fixing element 1a, 1b, 1c.
  • these deformable portions 7 include the only contact zones 13 of the fixing element 1a, 1b, 1c with the support element 3 which can be defined in all or part of the internal faces 14 of these deformable portions 7.
  • the contact zone 13 of each deformable portion 7 is intended to cooperate with a peripheral wall 10 of the connecting part of the support element 3 in particular with the corresponding contact region defined in this peripheral wall 10 of the support element 3.
  • the fixing element 1a, 1b, 1c then comprises at least four contact zones 13 which participate in achieving precise centering of the timepiece component 2, for example a hairspring, in the clockwork 110.
  • the elasticity or flexibility of element 1 is defined relative to the contact zones 13 of this element 1a, 1b, 1c more precisely relative to the intensity of the deformation of the deformable portions 7 during the application of a force to these contact zones 13.
  • the rigid portions 6 and deformable 7 allow the fixing element 1a, 1b, 1c to store a greater quantity of elastic energy for the same tightening in comparison with the fixing elements of the state of the art.
  • this significant storage of energy is linked in particular to the volume of material constituting this fixing element. 1a, 1b, 1c provided with through holes 4 and rigid portions 6 stressed in traction.
  • Such a quantity of elastic energy stored in the fixing element 1a, 1b, 1c then makes it possible to obtain a greater holding torque of the fixing element on the support element 3 in the assembly 130 of the assembly 120 fixing element - watchmaking component with this support element 3.
  • such a configuration of the fixing element 1a, 1b, 1c makes it possible to store elastic energy ratios which are 6 to 8 times higher than those of state-of-the-art fastening elements.
  • the arrangement of the rigid and deformable portions 6, 7 in the fixing element 1a, 1b, 1c allows, during insertion with tightening, a deformation of each deformable portion 7 making it possible to accommodate the deformation of the whole of the fixing element 1a, 1b, 1c with the geometry of the connecting part of the support element 3 on which it is assembled.
  • the through hole 4 of the fixing element 1a, 1b, 1c is configured in order to contribute to controlling the movement of the deformable portions 7, in particular to reduce this movement, so that the deformable portions 7 combined with the rigid portions 6 can store a maximum of elastic energy when driving the element 1a, 1b, 1c onto the support element 3 and thus increase the hold of this element 1a, 1b, 1c on this element 3.
  • the elastic fixing element 1a, 1b, 1c being provided with at least four contact zones 13, exerts a contact pressure which is greatly reduced on the peripheral wall 10 of the support element 3 thus contributing to reduce the sensitivity of this element 1a, 1b, 1c to breakage and chipping.
  • the invention also relates to a method of producing the assembly 130 of the assembly 120 elastic fixing element - watch component with the support element 3.
  • This method comprises a step 20 of inserting the support element 3 into the opening 5 of the fixing element 1a, 1b, 1c.
  • the end of the support element is presented at the entrance to the opening 5 defined in the lower face 12 of the fixing element 1a, 1b, 1c in anticipation of the introduction of the connecting part of this support element 3 in the volume defined in this opening 5.
  • This step 20 comprises a sub-step 21 of elastic deformation of the fixing element 1a, 1b, 1c in particular of a central zone of this element fixing 1a, 1b, 1c comprising said opening 5 resulting from the application of a contact force F on the contact zones 13 of the deformable portions 7 by the contact portions of the peripheral wall 10 of the connecting part of the support element 3.
  • This elastic deformation of the central zone actually generates a deformation of the different regions 8a, 8b, 8c of each deformable portion 7 comprising the contact zone 13.
  • This deformation sub-step 21 of the method comprises a phase of displacement 22 of the deformable portions 7 under the action of the contact force F which is applied to them.
  • Such a movement of these deformable portions 7 is carried out in a radial direction R relative to the axis of revolution A common to the support element 3 and to the fixing element 1.
  • the contact force F is preferably perpendicular or substantially perpendicular to said contact zone 13. During the progress of this phase 23, the rigid portions 6 do not deform.
  • This method then comprises a step 23 of fixing the fixing element 1a, 1b, 1c on the support element 3.
  • a fixing step 23, in particular by radial elastic tightening comprises a sub-step 24 of producing radial elastic tightening of the fixing element 1a, 1b, 1c on the support element 3.
  • the fixing element 1a, 1b, 1c stores a significant quantity of elastic energy which contributes to giving it a torque of consistent hold allowing in particular optimal twisting by elastic tightening.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Connection Of Plates (AREA)
EP22209690.1A 2022-11-25 2022-11-25 Befestigungselement für eine uhr Pending EP4375760A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP22209690.1A EP4375760A1 (de) 2022-11-25 2022-11-25 Befestigungselement für eine uhr
JP2023184144A JP2024076968A (ja) 2022-11-25 2023-10-26 時計の締結要素
US18/498,211 US20240176297A1 (en) 2022-11-25 2023-10-31 Fastening element for timepieces
CN202311592865.7A CN118092116A (zh) 2022-11-25 2023-11-24 用于时计的紧固元件

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22209690.1A EP4375760A1 (de) 2022-11-25 2022-11-25 Befestigungselement für eine uhr

Publications (1)

Publication Number Publication Date
EP4375760A1 true EP4375760A1 (de) 2024-05-29

Family

ID=84362941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22209690.1A Pending EP4375760A1 (de) 2022-11-25 2022-11-25 Befestigungselement für eine uhr

Country Status (4)

Country Link
US (1) US20240176297A1 (de)
EP (1) EP4375760A1 (de)
JP (1) JP2024076968A (de)
CN (1) CN118092116A (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1921517A1 (de) * 2006-11-09 2008-05-14 ETA SA Manufacture Horlogère Suisse Montageelement, das dehnbare Strukturen in Form von Gabeln umfasst, und dieses Element umfassende Uhr
EP3401740A1 (de) * 2017-05-12 2018-11-14 Patek Philippe SA Genève Uhrkomponente zum einpressen ohne gratbildung
CH716511A2 (fr) * 2019-08-16 2021-02-26 Nivarox Sa Organe de maintien élastique d'un composant d'horlogerie sur un élément de support.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1921517A1 (de) * 2006-11-09 2008-05-14 ETA SA Manufacture Horlogère Suisse Montageelement, das dehnbare Strukturen in Form von Gabeln umfasst, und dieses Element umfassende Uhr
EP3401740A1 (de) * 2017-05-12 2018-11-14 Patek Philippe SA Genève Uhrkomponente zum einpressen ohne gratbildung
CH716511A2 (fr) * 2019-08-16 2021-02-26 Nivarox Sa Organe de maintien élastique d'un composant d'horlogerie sur un élément de support.

Also Published As

Publication number Publication date
CN118092116A (zh) 2024-05-28
US20240176297A1 (en) 2024-05-30
JP2024076968A (ja) 2024-06-06

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