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EP3736640A1 - Unruh für uhrwerk - Google Patents

Unruh für uhrwerk Download PDF

Info

Publication number
EP3736640A1
EP3736640A1 EP19173069.6A EP19173069A EP3736640A1 EP 3736640 A1 EP3736640 A1 EP 3736640A1 EP 19173069 A EP19173069 A EP 19173069A EP 3736640 A1 EP3736640 A1 EP 3736640A1
Authority
EP
European Patent Office
Prior art keywords
balance
weight
elastic arm
elastic
housing
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
EP19173069.6A
Other languages
English (en)
French (fr)
Other versions
EP3736640B1 (de
Inventor
Ivan Hernandez
Pierre Cusin
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
Nivarox SA
Original Assignee
Nivarox Far SA
Nivarox 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, Nivarox SA filed Critical Nivarox Far SA
Priority to EP19173069.6A priority Critical patent/EP3736640B1/de
Priority to US16/829,053 priority patent/US11531304B2/en
Priority to JP2020068141A priority patent/JP6960498B2/ja
Priority to RU2020115006A priority patent/RU2745732C1/ru
Priority to CN202010377677.2A priority patent/CN111913381B/zh
Publication of EP3736640A1 publication Critical patent/EP3736640A1/de
Application granted granted Critical
Publication of EP3736640B1 publication Critical patent/EP3736640B1/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
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction
    • 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
    • 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
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/006—Mechanisms for setting frequency by adjusting the devices fixed on 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
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/04—Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat
    • 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
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/08—Component parts or constructional details

Definitions

  • the invention relates to a balance for a clockwork movement, comprising rigid parts consisting of a hub defining the pivot axis of the balance, a rim, and at least one arm connecting the rim to the hub, and comprising at least one locking member. holding for reception and pinching in position of a rod of a weight.
  • the invention relates to the field of clock oscillators, and more particularly to the field of balances comprising means for adjusting inertia and / or balancing.
  • balances Numerous embodiments of balances are known with means for adjusting inertia and / or balancing.
  • Some embodiments have attempted to ensure the retention of the weights by pinching.
  • CH 705 238 which discloses a balance comprising at least one slot for receiving and pinching in position a rod of a weight, the slot being delimited by, on the one hand a said rigid part of the balance, and on the other hand an arm elastic permanently biased towards said rigid part of said balance defining said slot to hold the weight.
  • the elastic arm undergoes significant plastic deformations due to its separation. These plastic deformations can then cause defects in the material, such as cracks. This can therefore adversely affect the reliability of the balance, or even damage it, the weight no longer being able to be held correctly by the elastic arm and become dislodged.
  • the object of the invention is in particular to overcome the various drawbacks of these known techniques.
  • an objective of the invention is to provide a balance making it possible to obtain better maintenance of the weights with an elastic arm capable of remaining within stress levels not exceeding its elastic limit and thus minimizing the risk of defects.
  • Another objective of the invention is to provide a balance with an elastic arm having a sufficiently rigid geometry and allowing sufficient support force to allow the weight to be held in place regardless of the type of shock that the watch has. suffered.
  • the invention also relates to a timepiece movement comprising a sprung balance oscillator system in accordance with the invention.
  • the invention also relates to a timepiece comprising a watch movement according to the invention.
  • the invention also relates to a method of mounting a weight on a balance according to the invention.
  • the object of the present invention by its various functional and structural aspects described above, makes it possible to obtain a more robust balance, in particular by virtue of a better distribution of the stresses.
  • the elastic arm allows a good hold of the weight thanks to its particular geometry which makes it possible to increase the volume of material under stress and to store more elastic energy.
  • the invention relates to a balance 1 for a timepiece movement.
  • the balance comprising rigid parts consisting of a hub 2 whose center defines the pivot axis A of the balance 1, a rim 3, and at least one arm 4 connecting the rim 3 to the hub 2.
  • the balance is made of copper, or of a copper alloy such as nickel silver.
  • the balance wheel can also be made of aluminum, an aluminum alloy, titanium or titanium alloy, gold or gold alloy, platinum or platinum alloy.
  • the balance 1 also comprises at least one elastic arm 5 comprising a first end 5B integral with a rigid part of said balance 1, and a second distal end 5A free with respect to said hub 2, said arm 4, and said rim sector 3, the free end 5A being able to deform in the plane of the rim and tighten a weight 6 on the balance.
  • the balance also has a slot 7 adapted to receive the weight 6, the slot 7 being delimited on the one hand by the free end 5A of the elastic arm, and on the other hand by a rigid wall 8 integral with the rim and the hub. .
  • the slot 7 has an opening 9 allowing the end 5A of the elastic arm to move perpendicularly with respect to the rigid wall 8 and to be in contact with the weight 6 to clamp it against said rigid wall when the latter is placed in slot.
  • the slot 7 opens into a housing 10 and comprises a notch 11 for precisely positioning the weight 6 and keep it in place.
  • the width of the opening 9 is provided less than the diameter of the weight or of the shank of the weight to hold the weight in place.
  • the weight 6 comprises a head 61 comprising an adjustment profile 63 arranged to cooperate with a tool.
  • the weight 6 may include a rod 62 which extends this head 61, which has a diameter greater than that of the rod 7.
  • the weight 6 is equipped with a foot 65, which the rod 62 then connects to the head 61, the latter and the foot 65 then both having a diameter greater than that of the rod. 62, so as to limit the travel of the weight 6 at the level of the elastic arm 5, in a direction parallel to the pivot axis D, or even to immobilize it in this direction.
  • the rod 62 extends along an axis passing through the center of the weight 6, once clamped in the clamping member 5, the weight is adjustable angularly about this axis by means of a tool on the adjustment profile 63
  • the weight 6 comprises an unbalance around this axis, which results for example from a flat 64 made on the head 61, as visible on the figure 2a .
  • the elastic arm 5 forms a housing 10 delimited by a wall 5B, the body 5C of the elastic arm is arranged to deform elastically during the assembly of the weight 6 to the balance, the free end 5A of the arm.
  • elastic 5 being able to move substantially perpendicularly, in the plane of the rim, with respect to the rigid wall 8.
  • the body 5C of the elastic arm can be considered as an embedded beam of non-constant section stressed in bending , the body 5C therefore undergoes very little plastic deformation and the lower part of the wall 5B hardly undergoes any.
  • the elastic arm 5 undergoes only 0.3% of plastic deformations while the solution used in the prior art undergoes 2% of plastic deformations.
  • the solution used therefore makes it possible to reduce the stresses undergone by the elastic arm 5 during the installation of the weight 6.
  • the dimensions and the geometry of the elastic arm 5 are determined to obtain a minimum desired holding force of the weight, the holding force obtained by the elastic arm being at least 0.7N.
  • the section of the body of the elastic arm varies, its section changing so as to increase the material under stress and to store therein as much elastic energy as possible.
  • the body 5C has a non-constant section, a part of the body having a greater thickness locally compared to the rest of the body.
  • Such a configuration makes it possible to have more material under stress and therefore to store more energy and thus restore a good holding force on the weight 6.
  • the thickness of the body 5C can be expected to increase. from its free end to its connection at the hub.
  • the length and the width of the deformable portion 5C are determined to remain below a stress level in order to avoid plastic deformation.
  • the dimensions of the elastic arm 5 make it possible to store a significant elastic energy resulting from the deformation of the arm, the deformation energy being restored in the form of a holding force on the rod of the weight clamped by the elastic arm 5, which ensures its strength and torque resistance in the notch 11.
  • the housing 10 formed by the elastic arm 5 has a relatively large radius at the bottom of curvature, this particular shape is determined to obtain a better distribution of the stresses during the assembly of the weight 6, the stresses being distributed over a much larger surface area compared to the prior art that prevents weakening of the structure at the bottom of the curvature.
  • the radius at the bottom of the curvature of the retaining member is much smaller, which implies a very localized distribution of stresses, the formation of microcracks at this location, and therefore a gradual reduction in the holding force over time.
  • the housing 10 has a substantially ovoid shape with an entrance defined by the slot 7 and a bottom, the bottom of the housing having dimensions greater than the entrance of the housing.
  • the body 5C of the at least one elastic arm 5 is integral with the hub 2.
  • This first embodiment is advantageous because the weight 6 can be placed beforehand in the housing 10 before moving it laterally in the slot 7 towards the notch 11, and there is therefore no longer any need to separate the arm mechanically in order to place the weight 6 therein, which reduces the stresses exerted on the elastic arm 5 by a minimum spacing just sufficient to slide the rod there.
  • the method may comprise an optional step following step c) during which the weight 6 is finely positioned so that the head of the weight is in contact with the upper face of the arm 5 and the upper face of the rigid wall 8.
  • the invention also relates to a balance 1 which comprises a plurality of retaining members 5, each being arranged to receive at least one weight 6.
  • the invention also relates to a timepiece movement comprising at least one such balance 1 as described above.
  • the invention also relates to a timepiece comprising at least one such movement, and which is preferably a watch.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)
  • Micromachines (AREA)
  • Gears, Cams (AREA)
  • Springs (AREA)
EP19173069.6A 2019-05-07 2019-05-07 Unruh für uhrwerk Active EP3736640B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP19173069.6A EP3736640B1 (de) 2019-05-07 2019-05-07 Unruh für uhrwerk
US16/829,053 US11531304B2 (en) 2019-05-07 2020-03-25 Timepiece balance
JP2020068141A JP6960498B2 (ja) 2019-05-07 2020-04-06 計時器用バランス
RU2020115006A RU2745732C1 (ru) 2019-05-07 2020-04-28 Баланс часов
CN202010377677.2A CN111913381B (zh) 2019-05-07 2020-05-07 时计摆轮

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19173069.6A EP3736640B1 (de) 2019-05-07 2019-05-07 Unruh für uhrwerk

Publications (2)

Publication Number Publication Date
EP3736640A1 true EP3736640A1 (de) 2020-11-11
EP3736640B1 EP3736640B1 (de) 2022-12-21

Family

ID=66448404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19173069.6A Active EP3736640B1 (de) 2019-05-07 2019-05-07 Unruh für uhrwerk

Country Status (5)

Country Link
US (1) US11531304B2 (de)
EP (1) EP3736640B1 (de)
JP (1) JP6960498B2 (de)
CN (1) CN111913381B (de)
RU (1) RU2745732C1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3839656B1 (de) * 2019-12-18 2023-12-13 Nivarox-FAR S.A. Unruh für uhrwerk

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD922893S1 (en) * 2019-05-07 2021-06-22 Nivarox-Far Sa Watch component
EP4194964B1 (de) 2021-12-10 2024-07-24 Nivarox-FAR S.A. Unruh mit trägheitsregulierung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH705238A2 (fr) 2011-07-15 2013-01-15 Nivarox Sa Balancier à réglage d'inertie pour mouvement d'horlogerie.
CH710017A2 (fr) * 2014-08-26 2016-02-29 Nivarox Sa Balancier à réglage d'inertie.
CH711766A2 (fr) * 2015-11-13 2017-05-15 Nivarox Far Sa Balancier à réglage d'inertie.

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH698024B1 (fr) 2005-03-23 2009-04-30 Patek Philippe Sa Balancier inertiel.
JP5210193B2 (ja) 2009-02-04 2013-06-12 セイコーインスツル株式会社 ひげぜんまい支持構造、該支持構造を備えたてんぷ構造体及び該構造体を備えた機械式時計
CH703463A2 (fr) * 2010-07-19 2012-01-31 Nivarox Sa Balancier à réglage d'inertie sans insert.
USD700535S1 (en) * 2011-12-28 2014-03-04 Nivarox-Far S.A. Balance wheel with control knobs
EP2916177B1 (de) * 2014-03-05 2018-11-07 Nivarox-FAR S.A. Spirale, die mit einer Federscheibe gesichert werden muss
CH709654B1 (fr) * 2014-05-14 2021-03-15 Eta Sa Mft Horlogere Suisse Bascule d'horlogerie et mécanisme de correction rapide comportant une telle bacule.
EP2990882B1 (de) 2014-08-26 2020-01-15 Nivarox-FAR S.A. Unruh mit Trägheitsregulierung
EP2990883A1 (de) * 2014-08-29 2016-03-02 Nivarox-FAR S.A. Spiralunruh-Einheit für Uhrwerk
CH710866A2 (fr) * 2015-03-02 2016-09-15 L Leroy S A Balancier-spiral auto-compensé pour mouvement horloger.
CN206178347U (zh) 2015-11-13 2017-05-17 尼瓦洛克斯-法尔股份有限公司 带有惯量调节的摆轮、钟表机芯和钟表件
EP3451076B1 (de) 2017-08-31 2020-07-29 ETA SA Manufacture Horlogère Suisse Spiralklötzchenträger für ein mechanisches uhrwerk

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH705238A2 (fr) 2011-07-15 2013-01-15 Nivarox Sa Balancier à réglage d'inertie pour mouvement d'horlogerie.
CH710017A2 (fr) * 2014-08-26 2016-02-29 Nivarox Sa Balancier à réglage d'inertie.
CH711766A2 (fr) * 2015-11-13 2017-05-15 Nivarox Far Sa Balancier à réglage d'inertie.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3839656B1 (de) * 2019-12-18 2023-12-13 Nivarox-FAR S.A. Unruh für uhrwerk

Also Published As

Publication number Publication date
EP3736640B1 (de) 2022-12-21
US11531304B2 (en) 2022-12-20
CN111913381A (zh) 2020-11-10
JP2020183937A (ja) 2020-11-12
RU2745732C1 (ru) 2021-03-31
CN111913381B (zh) 2022-06-07
US20200356055A1 (en) 2020-11-12
JP6960498B2 (ja) 2021-11-05

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