EP3291025A1 - Stossdämpfer mit multileaf-blattfedern - Google Patents

Stossdämpfer mit multileaf-blattfedern Download PDF

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Publication number
EP3291025A1
EP3291025A1 EP16186316.2A EP16186316A EP3291025A1 EP 3291025 A1 EP3291025 A1 EP 3291025A1 EP 16186316 A EP16186316 A EP 16186316A EP 3291025 A1 EP3291025 A1 EP 3291025A1
Authority
EP
European Patent Office
Prior art keywords
blade
blades
pivot
support
stone
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.)
Granted
Application number
EP16186316.2A
Other languages
English (en)
French (fr)
Other versions
EP3291025B1 (de
Inventor
Deirdré LENOIR
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.)
Montres Breguet SA
Original Assignee
Montres Breguet 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 Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP16186316.2A priority Critical patent/EP3291025B1/de
Priority to US15/675,830 priority patent/US10599100B2/en
Priority to JP2017157041A priority patent/JP6405426B2/ja
Priority to CN201710755936.9A priority patent/CN107797437B/zh
Publication of EP3291025A1 publication Critical patent/EP3291025A1/de
Priority to HK18110500.2A priority patent/HK1251304A1/zh
Application granted granted Critical
Publication of EP3291025B1 publication Critical patent/EP3291025B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/02—Shock-damping bearings
    • G04B31/04—Shock-damping bearings with jewel hole and cap jewel
    • 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
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/004—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor characterised by the material used
    • 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
    • G04B43/00—Protecting clockworks by shields or other means against external influences, e.g. magnetic fields
    • G04B43/002—Component shock protection arrangements

Definitions

  • the present invention relates to a shock absorber device for an axis of a mobile of a timepiece arranged on a support, said support being provided with a housing at least partially through so that a pivot member cooperating with a axle of the axis of the mobile is inserted therein, characterized in that said device further comprises a spring means comprising at least a first blade and a second blade.
  • a first system is a lyre system that is to say that the plate or bridge is provided with a hole through which the shank of an axis can pass. This hole serves as a housing for a support, pierced at its center, in which a kitten is arranged. This kitten carries a pierced stone and a counter-pivot stone, the whole being put under stress by a lyre spring arranged between the support, which has flanges serving as points of support, and the kitten.
  • Another system is the fall arrest system in which the pivots of the balance are made so as to give them the shape of a cone and hold them in place by a small cup of corresponding shape, mounted on a leaf spring.
  • Watchmaking shock absorbers are usually constituted by mechanical springs and are still sized according to the old rules, according to practical rules considered as the best compromise between mechanical stability during operation and resistance to mechanical deformations.
  • the sprung balance shock absorbers, the parachutes and the lyres are dimensioned so as not to be activated up to relatively large shock accelerations (between 200 and 500 times the gravity), thanks to the spring preload. Beyond this threshold value, the spring can be deform and absorb some of the shock energy. However, because of the low mechanical damping of the metal blades used as shockproof, most of the energy is returned to the balance. The local deformation of the pendulum pivot is therefore very likely, already for relatively small shocks. This deformation, which has a considerable impact on the chronometric accuracy of the watch, is generally neglected because the standard certifying the chronometric stability of a COSC watch after a shock of one meter is not severe (60 s / j of difference).
  • the invention aims to overcome the disadvantages of the prior art by proposing to provide.
  • the present invention relates to a shock absorbing device for an axis of a mobile of a timepiece arranged on a support, said support being provided with a housing at least partially through so that an element of pivot cooperating with a tigeron of the axis of the mobile is inserted therein, characterized in that said device further comprises a spring means comprising at least a first blade and a second blade spaced apart from each other extending from the support and in that that the first blade is in contact with said pivot member and exerting a prestress.
  • said blades extend in parallel.
  • said blades extend in the same direction.
  • said blades extend in a convergent direction, the point of intersection of the blades being located opposite the pivot element.
  • said pivot element consists of a pivot stone free axially in said housing, this pivot stone comprising a recess in which the axle of the axle is inserted.
  • said pivot element consists of a free kitten axially in said housing, a pierced stone and a counter-pivot stone being driven into said kitten.
  • said pivot member and the first blade form a single piece.
  • said pivot element is a pivot stone driven into a hole arranged on the first blade.
  • said first blade and the second blade have different stiffnesses, the first blade being less rigid than the second blade.
  • the spring means further comprise a third blade, the third blade being more rigid than the second blade.
  • the difference in stiffness between the different blades is obtained by differentiating the material between the blades and / or having elastic blades of different sizes / shapes.
  • the resilient blades are fixed to the support by means of a pad provided with washers arranged between two resilient blades to allow their spacing.
  • the stud is attached to the support.
  • the stud is integral with the support.
  • said housing is completely through and has an inner wafer from which the elastic blades extend.
  • the present invention proceeds from the general idea of providing a shock absorbing system having a progressiveness in shock absorption.
  • a shock absorbing device 1 or shockproof system according to a first embodiment is shown.
  • This shock absorbing device or shockproof system 1 is mounted in a base element 101 or support a movement of a timepiece.
  • the plate or the bridges of the movement are the basic element in which the shockproof system 1 according to the invention is placed.
  • This damping device shocks is used to dampen the shocks of an axis 2 of a timepiece mobile: a wheel or a wheel or escape wheel.
  • This base element or support 101 is provided with an opening 102 facing the axis 2 to be damped.
  • the axis 2 cooperates with a pivot element 103.
  • This pivot element 103 may be a pivot stone comprising a recess for the axle tigeron engages. This pivot stone can be placed directly in the opening or via a kitten so that it can move at least axially during an impact.
  • the shock absorbing device further comprises one of the spring means 110 for damping the axis of the mobile.
  • These spring means advantageously comprise a plurality of elastic blades 112. These blades are arranged between them to be superimposed.
  • the resilient blades extend from a stud 114.
  • This stud 114 is a piece which is fixed, by screwing, gluing, welding, or soldering, to the plate or to the pendulum bridge.
  • the elastic blades therefore extend from one of their ends, fixed to the stud.
  • the blades 112 are spaced apart by means of washers 115 in order to be able to deform independently of one another and to present an interlime space (preferably adjustable).
  • This gap can be constant or be, at the free end of the blades, larger or smaller than the space at the level of the stud as visible at Figures 9 and 10 .
  • These blades can extend in the same direction or not. In the case where the blades extend in different directions, the attachment points of the different blades are spaced so as to have the blades that converge, the cross points of the different blades being ideally opposite the pivot stone as visible to the figure 8 .
  • the assembly 110 formed by the elastic blades 112 and the pad 114 is then arranged so that one of the resilient blades, in particular the elastic blade facing the pivot member, exerts a prestress.
  • the resilient blade is in contact with and presses against the pivot member.
  • This configuration with several blades allows for a progressive shock resistance, allowing to dissipate a greater amount of energy (shock) by multiple 'impacts' and the use of highly dissipative materials.
  • the blades forming the spring means 110 are identical in size and material.
  • the operation of this set is as follows. During an impact, the apparent rigidity felt by the pendulum (or any other mobile watch), gradually increases in identical discrete steps depending on the deflection arrow (so depending on the energy of the shock).
  • the discontinuity of rigidity occurs when one of the blades 112 is sufficiently flexed to abut against the following blade: at this moment, the impact energy (kinetic energy of the balance) is partially dissipated by an impact mechanism (characterized by a certain coefficient of restitution).
  • the discontinuity of rigidity thus makes it possible to increase the dissipation of energy during the impact.
  • the blades 112 are different in materials and dimensions. Indeed, the dissipative effect and the stiffness profile can be optimized by using blades of geometries or different materials.
  • the other blades 112 may be adapted outside these ranges, depending on the materials used, the weight of the balance and other geometric parameters of the movement.
  • the goal to be achieved is the same, that is to say, to modify the rigidity of the blades 112 in order to obtain an adequate response to a shock.
  • the first elastic blade 112 that is to say the blade 112 in contact with the pivot element 103 is designed to be quite elastic which plasticizes rather late and other blades 112 more rigid allowing better dissipation of the shock energy.
  • the resilient blades 112 are arranged to replace the pivot member 103.
  • the resilient blades 112 and the pivot member 103 form a single assembly.
  • these elastic blades 112 are arranged so that the first blade, that is to say the blade closest to the base member (platinum or bridge) serve as a pivot member 103.
  • the first blade that is to say the blade closest to the base member (platinum or bridge) serve as a pivot member 103.
  • the first solution visible to the figure 4 is to directly use the first blade 112 as a pivot member. It is understood by this that the elastic blade 112 is made of a first material and that the tigeron of the axis comes into contact with this first material.
  • the blade elastic 112 may be provided with a recess facilitating the placement of the axle shank.
  • the first elastic blade 112 carries a pivot member 103 '.
  • the resilient blade 113 has a hole, crossing or not in which a pivot member is arranged.
  • This pivoting element will preferably be a pivot stone in a ruby type material. This pivot stone will be fixed by gluing, welding, brazing or any other possible methods of attachment.
  • the elastic blades 112 extend inside the opening of the base element 101, ie the plate or the bridge.
  • the opening 102 has a slice or inner wall from which the resilient blades 112 extend.
  • This variant advantageously makes it possible to be more compact by directly integrating the blades 112 into the opening 102 which limits the thickness of the system.
  • the elastic blades 112 forming the spring means 110 are monoblock with the support member 101.
  • the first is to use metal glasses known for their shaping properties when heated between their glass transition temperature Tg and their crystallization temperature Tx.
  • Another solution consists in producing the assembly formed of the spring means and the silicon base element using a Liga or a drie method.
  • the opening 102 of the base member can be used to drive a support block 200 provided with a housing 201 and a through hole 202 to accommodate the pivot member 103.
  • the pivot element which will be a simple stone or a kitten 204 with a pierced stone 205 and a counter pivot stone 206 will rest in the bottom of the support block as visible in FIG. figure 11 .

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Vibration Dampers (AREA)
  • Springs (AREA)
  • Electromechanical Clocks (AREA)
EP16186316.2A 2016-08-30 2016-08-30 Stossdämpfer mit multileaf-blattfedern Active EP3291025B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP16186316.2A EP3291025B1 (de) 2016-08-30 2016-08-30 Stossdämpfer mit multileaf-blattfedern
US15/675,830 US10599100B2 (en) 2016-08-30 2017-08-14 Multi-blade shock absorber
JP2017157041A JP6405426B2 (ja) 2016-08-30 2017-08-16 マルチブレード緩衝装置
CN201710755936.9A CN107797437B (zh) 2016-08-30 2017-08-29 多叶片式减震装置
HK18110500.2A HK1251304A1 (zh) 2016-08-30 2018-08-15 多葉片式減震裝置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16186316.2A EP3291025B1 (de) 2016-08-30 2016-08-30 Stossdämpfer mit multileaf-blattfedern

Publications (2)

Publication Number Publication Date
EP3291025A1 true EP3291025A1 (de) 2018-03-07
EP3291025B1 EP3291025B1 (de) 2020-08-19

Family

ID=56842758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16186316.2A Active EP3291025B1 (de) 2016-08-30 2016-08-30 Stossdämpfer mit multileaf-blattfedern

Country Status (5)

Country Link
US (1) US10599100B2 (de)
EP (1) EP3291025B1 (de)
JP (1) JP6405426B2 (de)
CN (1) CN107797437B (de)
HK (1) HK1251304A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3719587A1 (de) * 2019-04-04 2020-10-07 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Stossdämpfungsvorrichtung und mechanischer oszillator eines uhrwerks mit flexibler führung, der über eine solche stossdämpfungsvorrichtung verfügt

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3971655A1 (de) * 2020-09-18 2022-03-23 ETA SA Manufacture Horlogère Suisse Stossdämpfungsschutz mit anschlag eines resonatormechanismus mit flexibler drehführung
EP4242753A1 (de) * 2022-03-11 2023-09-13 ETA SA Manufacture Horlogère Suisse Vorrichtung zum führen einer welle einer unruh mit spiralfeder
EP4321339A1 (de) * 2022-08-12 2024-02-14 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Verfahren zur herstellung einer dämpfungsvorrichtung zur schwingungsdämpfung und/oder stossdämpfung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1976181A (en) * 1932-02-13 1934-10-09 Marti Fritz Jewel bearing for watches and the like
CH335173A (fr) * 1957-01-28 1958-12-31 Schwartzmann Marcel Auguste An Palier amortisseur de chocs pour mobile d'horlogerie
FR1186621A (fr) * 1956-11-12 1959-08-28 Palier élastique pour pièce d'horlogerie
EP2796940A2 (de) * 2013-04-23 2014-10-29 Rolex Sa Uhrkomponente zur Aufnahme eines Organs durch Einpressen

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH257156A (fr) * 1943-01-11 1948-09-30 Morf Ernest Palier amortisseur de chocs.
CH251926A (fr) * 1943-11-03 1947-11-30 Zurcher Roger Dispositif de palier pare-choc pour mobile d'horlogerie.
US2750731A (en) * 1952-10-17 1956-06-19 Colomb Henri Stationary bearing, including an endstone for pivots, chiefly clockwork pivots
US2919961A (en) * 1955-12-30 1960-01-05 Isico S A Shocks cushioning bearing for measuring instrument
US3036871A (en) * 1959-09-30 1962-05-29 Parechoc Sa Device for pivoting a movable element of a clockwork movement or of a small mechanism
US4468134A (en) * 1982-06-10 1984-08-28 Timex Corporation Watch bezel/lens/rocker switch assembly
DE05405263T1 (de) * 2005-03-23 2007-05-03 Rolex Sa Stoßdämpfende Lagerung für Uhren
JP5657106B2 (ja) * 2010-06-22 2015-01-21 ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド 時計の衝撃吸収軸受
CN104133362B (zh) * 2013-05-01 2021-05-18 劳力士有限公司 钟表振荡器的摆锤的减震体
EP2816423A1 (de) * 2013-06-21 2014-12-24 ETA SA Manufacture Horlogère Suisse Stoßsicheres System mit gesicherter Montage
CH708936B1 (fr) * 2013-12-11 2019-07-31 Swatch Group Res & Dev Ltd Palier antichoc bi-matière pour mobile de pièce d'horlogerie.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1976181A (en) * 1932-02-13 1934-10-09 Marti Fritz Jewel bearing for watches and the like
FR1186621A (fr) * 1956-11-12 1959-08-28 Palier élastique pour pièce d'horlogerie
CH335173A (fr) * 1957-01-28 1958-12-31 Schwartzmann Marcel Auguste An Palier amortisseur de chocs pour mobile d'horlogerie
EP2796940A2 (de) * 2013-04-23 2014-10-29 Rolex Sa Uhrkomponente zur Aufnahme eines Organs durch Einpressen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3719587A1 (de) * 2019-04-04 2020-10-07 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Stossdämpfungsvorrichtung und mechanischer oszillator eines uhrwerks mit flexibler führung, der über eine solche stossdämpfungsvorrichtung verfügt
CH716041A1 (fr) * 2019-04-04 2020-10-15 Csem Ct Suisse Delectronique Microtechnique Sa Rech Developpement Dispositif antichoc et oscillateur mécanique horloger à guidage flexible disposant d'un tel dispositif antichoc.

Also Published As

Publication number Publication date
US20180059619A1 (en) 2018-03-01
US10599100B2 (en) 2020-03-24
CN107797437B (zh) 2020-07-24
JP6405426B2 (ja) 2018-10-17
EP3291025B1 (de) 2020-08-19
HK1251304A1 (zh) 2019-01-25
CN107797437A (zh) 2018-03-13
JP2018036261A (ja) 2018-03-08

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