EP3470934B1 - Système antichoc à blocage angulaire - Google Patents

Système antichoc à blocage angulaire Download PDF

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Publication number
EP3470934B1
EP3470934B1 EP17195675.8A EP17195675A EP3470934B1 EP 3470934 B1 EP3470934 B1 EP 3470934B1 EP 17195675 A EP17195675 A EP 17195675A EP 3470934 B1 EP3470934 B1 EP 3470934B1
Authority
EP
European Patent Office
Prior art keywords
spring ring
shock
support
notch
rim
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
EP17195675.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3470934A1 (fr
Inventor
Antonio Merino
Thierry Conus
Ivan Villar
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.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
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 ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP17195675.8A priority Critical patent/EP3470934B1/fr
Priority to JP2018179007A priority patent/JP6557390B2/ja
Priority to CN201811172481.9A priority patent/CN109656120B/zh
Priority to US16/156,115 priority patent/US11169487B2/en
Publication of EP3470934A1 publication Critical patent/EP3470934A1/fr
Application granted granted Critical
Publication of EP3470934B1 publication Critical patent/EP3470934B1/fr
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
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/02—Shock-damping bearings
    • 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
    • G04B37/04—Mounting the clockwork in the case; Shock absorbing mountings
    • G04B37/05—Fixed mountings for pocket or wrist watches
    • G04B37/052—Fixed mountings for pocket or wrist watches with shock damping means not related to the winding stem
    • 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
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton

Definitions

  • the present invention relates to a shock-absorbing device also called an anti-shock system for an axis of a moving body of a micromechanical device, in particular but not exclusively a clockwork movement.
  • the shock-absorbing device comprises a support in which is provided a housing intended to receive a pivot system for maintaining with a pre-established movement a shank of the axis.
  • the shock-absorbing device further comprises elastic means arranged to exert on the pivot system at least an axial elastic return force.
  • the technical field of the invention is the technical field of fine mechanics.
  • the present invention relates to a shock absorbing device for an axis arranged in a micromechanical mechanism, in particular in a mechanical or electromechanical clockwork movement.
  • shock-absorbing devices also called “shock-absorbing bearings” or “shock-absorbing systems” have been known for a long time by manufacturers of mechanical watches.
  • the purpose of these shock-absorbing devices is to allow an axis to absorb the energy resulting from an impact, in particular from a side impact, by allowing it to temporarily deviate from its rest position, then to return to this rest position under the effect of an elastic return force. It will be understood that, in micromechanical mechanisms in general, and in clock movements in particular, most of the axes extend vertically with respect to the plane in which such micromechanical mechanisms or clock movements extend.
  • a clockwork movement can therefore essentially undergo two different types of shocks: either an axial shock, if the watch falls substantially flat on a surface; or a side impact, if the watch falls on the side of the caseband.
  • the side impact is the more annoying.
  • the force resulting from this shock is exerted substantially perpendicularly to the back of the watch, and therefore approximately parallel to the direction in which the axes of the clockwork movement extend.
  • the risks that these axes become dislodged or broken are therefore quite limited.
  • the force resulting from the impact is exerted in a direction approximately perpendicular to the axes, so that the risk of the axes coming out of their housing and / or breaking is high.
  • shock-absorbing devices also called shock-absorbing systems.
  • shock absorbing devices comprise a support having a base without a bottom to allow passage to an axis terminated by a tigeron.
  • the support receives a kitten which is a part of generally annular shape and which supports in a stepped manner a pierced stone crossed by the shank of the axis and a counter-pivot stone.
  • the assembly formed by the kitten, the pierced stone and the counter-pivot stone is held elastically in the support by means of a spring element mounted on the support in a removable manner and which exerts on the counter-pivot stone an elastic force of tackle.
  • shock-absorbing devices are in particular marketed under the brand Incabloc®.
  • the spring element it can in particular be made of brass or else with a spring steel such as the austenitic cobalt-chrome grade sold. under the brand Phynox ⁇ KL, and is conventionally obtained by cutting techniques.
  • the axis will be offset and will come up against the base of the support, which causes the off-center of the pierced stone and, consequently, of the kitten and the counter-pivot stone.
  • the spring element brings all the elements back to their equilibrium position.
  • FIG. 1 and 2 appended to the present patent application schematically illustrate a shock-absorbing device which is currently used in timepieces on the market.
  • This shock-absorbing device is described in detail in the European patent application published under the number EP 3220211 on behalf of the Claimant.
  • the shock-absorbing device also called an anti-shock system
  • the shock-absorbing device 1 may in particular be mounted in an element of a timepiece movement such as a plate or a bridge.
  • This shock-absorbing device 1 comprises in particular a support 2 which is in the form of a cup 4, a base 6 of which has no bottom and which is delimited at its periphery by a first rim 8. It will be noted that the cup 4 and the first flange 8 can be made in one piece, or else be separate pieces assembled together.
  • the first flange 8 On the side opposite to the base 6 of the cup 4, the first flange 8 comprises an upper surface 10 extended, on the interior side of the cup 4, by an internal wall 12, and on the exterior side of the cup by an external wall 14.
  • the first flange 8 defines with the cup 4 a housing 16 in which a pivot module 18 is inserted.
  • This pivot module 18 comprises a chaton 20, that is to say a part comprising a circular central orifice 22 and a second flange 24 delimited by an outer side wall 26 and an inner side wall 28.
  • a pierced stone 30 is inserted, the diameter of which corresponds to that of the circular central orifice 22.
  • the internal side wall 28 of the kitten 20 it is provided with a shoulder 32 on which is placed a counter-pivot stone 34.
  • the pivot module 18 thus arranged is placed in the housing 16 of the support 2, then the assembly thus obtained is inserted, for example in an orifice of a watch plate or in one of the bridges of a watch movement.
  • the pivot module 18 is arranged to cooperate with a shank 36 of an axis 38.
  • the shock-absorbing device 1 further comprises elastic means 40 provided to cooperate with the pivot module 18 in order to absorb the shocks and return the pivot module 18 to its rest position when the stresses induced by the shocks fade.
  • elastic means 40 are fixed on the support 2 and are preferably also in contact with the pivot module 18.
  • the elastic means 40 are in the form of a spring ring 42 of the flat type, that is to say cut from a strip or a ribbon of which a width is significantly greater than the thickness.
  • This spring ring 42 is metallic and circular in shape, centered on a point C.
  • the spring ring 42 comprises for example three regularly spaced arms 44 which extend radially towards the center C of this spring ring 42. These three arms 44 allow the spring ring 42 to press the pivot module 18 into the housing 16 support 2.
  • a bayonet system 46 For mounting the spring ring 42 on the support 2, a bayonet system 46 is used.
  • This bayonet system 46 comprises a peripheral bearing surface 48 which extends from the first flange 8 of the support 2 towards the center of this support. 2.
  • a circular groove 50 is formed in the internal wall 12 of the first flange 8, under the peripheral bearing surface 48, to define a holding zone.
  • the spring ring 42 is provided on its outer periphery with three regularly spaced lugs 52 which extend radially opposite the center ⁇ of this spring ring 42. As can be seen in Drawing, each of these three lugs 52 is arranged between two consecutive arms 44 of the spring ring 42. The three lugs 52 deliberately give the spring ring 42 an outer diameter which exceeds the inner diameter of the peripheral bearing surface 48. By Therefore, to allow the mounting of the spring ring 42 on the support 2, there are provided in the peripheral surface 48 of the first notches 54, three in number, which open into the circular groove 50.
  • the notches 54 are typically produced by a forging operation of the peripheral bearing surface 48 which reveals the circular arc portions 55. At each of the ends of the circular arc portions 55, the material is locally pushed back during the operation. forging, which forms hollows 57a on top of these arcuate portions 55, and bosses 57b below the arcuate portions 55. These bosses 57b contribute to maintaining the spring ring 52 when the latter. ci is introduced into the circular groove 50, under the arcuate portions 55 of the peripheral bearing surface 48.
  • the mounting of the spring ring 42 occurs after the step aimed at placing the pivot module 18 in its housing 16.
  • the pivot module 18 exerts on this spring ring 42 a force which tends to push back this spring ring 42.
  • the spring ring 42 tends to deform elastically, but is not driven from its housing 16 thanks to the presence of the pins 52 inserted in the circular groove 50 which absorb the mechanical stresses and oppose the movement of the spring ring 42.
  • the lugs 52 define passive zones of the spring ring 42, the presence of these lugs 52 and the mechanical stresses that they absorb have no effect on the behavior of the spring ring 42. Consequently, the behavior of the spring ring 42 is not modified when the latter is mounted on the support 2.
  • a shock-absorbing device is intended to allow a micromechanical axis, for example housed in a watch movement, to absorb without breaking the energy resulting from an impact, in particular from a side impact. , by allowing this axis to move momentarily under the effect of a shock before returning it elastically to its rest position.
  • the spring ring 42 is nevertheless capable of pivoting on itself and it is quite possible that it finds itself in a situation in which the three lugs 52 are in the first three corresponding notches 54. In such a situation, the spring ring 42 can be decoupled from the support 2.
  • the axis 38 is then no longer held by the shock-absorbing device 1, which inevitably leads to the breakdown of the mechanical device, for example a watchmaker, in which is installed this shock-absorbing device 1.
  • the shock-absorbing devices are mainly installed in watches which belong to the upper segment of the market.
  • countersinking is understood to mean the action of raising the lower surface of the peripheral bearing surface 48 by removing material by means of a rotating blade. Thanks to this counterbore action, it is possible to partially reduce the thickness of a third flange 56 of the peripheral bearing surface 48 and to create, between two successive notches 54, clearances 58 in which the lugs 52 are housed.
  • the object of the present invention is to solve the above-mentioned problems as well as others still by proposing a shock-absorbing device in which the risks of its various components falling apart in the event of an axial or lateral impact are considerably reduced, or even eliminated.
  • the present invention relates to a shock-absorbing device for an axis of a mobile of a micromechanical device, in particular a clockwork movement, this shock-absorbing device comprising a support which comprises a cup, one base of which is without a bottom and which is delimited at its periphery by a rim, the rim comprising an extended upper surface, on an inner side of the cup, by an internal wall, and, on an outer side of the cup, by a wall external, the rim of the cup defining a housing in which a pivot module is inserted, this pivot module comprising a kitten having a central orifice in which is inserted a pierced stone which corresponds in shape and dimensions to those of the central orifice, a counter-pivot stone being placed on the kitten, above the pierced stone, the shock-absorbing device also comprising a spring ring arranged between the support and the pivot module for exert an elastic stress on this pivot module, the shock-absorbing device being provided with a bayonet system for
  • the present invention provides a shock absorbing device in which second notches are cut in the rim of the peripheral bearing surface. This moves away from the circular profile of the rim of the peripheral bearing surface, which allows the lugs of the spring ring to adopt a position of least constraint under the lower surface of the peripheral rim, and to abut against the ridges which delimit the profile of these second notches.
  • the spring ring is thus locked in angular pivoting, which makes it possible to guarantee that in the event of an impact, in particular lateral, the risks that the axes of the moving parts disengage completely are limited, or even zero.
  • Another advantage of the invention lies in the fact that the notches are very easy to machine, for example by stamping or cutting.
  • the present invention proceeds from the general inventive idea which consists in cutting in the edge of the peripheral bearing surface of the support of a shock-absorbing device notches intended to receive the locking pins of a spring ring intended to force the stone. counter-pivot in the direction of the pierced stone which guides the tigeron of a mobile axis.
  • These notches for example produced by stamping or cutting, are easier to machine, so that the cost price of the resulting supports is lower than in the past.
  • the notches are cut from the full thickness of the rim, the locking of the lugs against the ridges which define the contour of these notches is optimal.
  • great freedom is enjoyed with regard to the shape that can be given to these notches, which, for each spring ring geometry, allows to find the shape of the notches guaranteeing the best locking of this spring ring.
  • the shock-absorbing device according to the invention is in all respects identical to the shock-absorbing device of the prior art described above, with the notable difference that the edge of the peripheral bearing surface of the support is partially cut out according to notches which allow the locking of the lugs of the spring ring, and therefore the angular pivoting locking of the latter. It will therefore be understood that, in what follows, the elements identical to those described in connection with the figures 1 and 2 will be designated by the same reference numerals.
  • this shock-absorbing device comprises in particular a spring ring 42 of the flat type provided with at least one and, in the example shown, three arms 44 which are regularly spaced apart which extend radially. towards the center C of this spring ring 42. These three arms 44 allow the spring ring 42 to press the pivot module 18 into the housing 16 of the support 2.
  • a bayonet system 46 is used which comprises a peripheral bearing surface 48 extending from the first flange 8 of the support 2 towards the center of this support 2. Furthermore, a circular groove 50 is formed in the internal wall 12 of the first flange 8, under the peripheral bearing surface 48, to define a holding zone .
  • the spring ring 42 is provided on its outer periphery with at least one and, in the example shown, three regularly spaced lugs 52 which extend radially away from the center. ⁇ of this spring ring 42. As can be seen in the drawing, these three lugs 52 are arranged angularly offset with respect to the three arms 44 of the spring ring 42, preferably at an equal angular distance from two consecutive arms 44.
  • the three lugs 52 give the spring ring 42 an outer diameter which exceeds the inner diameter D of the peripheral bearing surface 48. Consequently, to allow the spring ring 42 to be mounted on the support 2, it is provided in the peripheral bearing surface 48 of the first notches 54, three in number, which open into the circular groove 50. These first three notches 54 are arranged with the same angular spacing as the lugs 52. Consequently, to mount the spring ring 42 on the support 2, it suffices to present it so that the three lugs 52 are found opposite the first three corresponding notches 54, then to rotate it in order to allow the lugs 52 to slide inside the circular groove 50, under the peripheral range 48.
  • the notches 54 are typically produced by a forging operation of the peripheral bearing surface 48 which reveals the circular arc portions 55. At each of the ends of the circular arc portions 55, the material is locally pushed back during the operation. forging, which forms hollows 57a on top of these arcuate portions 55, and bosses 57b below the arcuate portions 55. These bosses 57b contribute to the retention of the spring ring 52 when the latter is introduced into the circular groove 50, under the arcuate portions 55 of the peripheral bearing surface 48.
  • the mounting of the spring ring 42 occurs after the step aimed at placing the pivot module 18 in its housing 16.
  • the pivot module 18 exerts on this spring ring 42 a force which tends to push back this spring ring 42.
  • the spring ring 42 tends to deform elastically, but is not driven from its housing 16 thanks to the presence of the pins 52 inserted in the circular groove 50 which absorb the mechanical stresses and oppose the movement of the spring ring 42.
  • the lugs 52 define passive zones of the spring ring 42, the presence of these lugs 52 and the mechanical stresses that they absorb have no effect on the behavior of the spring ring 42. Consequently, the behavior of the spring ring 42 is not modified when the latter is mounted on the support 2.
  • second notches 62 are machined, for example for example by cutting or stamping, in the third flange 56 of the peripheral bearing surface 48 of the support 2.
  • the second notches 62 are cut in the third rim 56 of the peripheral bearing surface 48 of the support 2, over the entire thickness of this third rim 56 and biting on the perimeter of this third rim 56.
  • these second notches 62 are sufficiently deep and their ridges 64 sufficiently high to ensure the proper locking of the lugs 52 and the immobilization of the spring ring 42 in angular pivoting in the event of an impact.
  • these second notches 62 are very easy to machine and their profile can therefore be adapted as best as possible in order to guarantee optimum locking.
  • the second notches 62 have been obtained by cutting the peripheral bearing surface 48 according to a circle of small radius whose center C1 is on the bisector of the angle ⁇ which extends between two first successive notches 54.
  • the second notches 62 were obtained by cutting the peripheral bearing area along a circle of greater radius whose center C2 is also located on the bisector of the angle which extends between two first successive notches 54.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Vibration Dampers (AREA)
  • Springs (AREA)
EP17195675.8A 2017-10-10 2017-10-10 Système antichoc à blocage angulaire Active EP3470934B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP17195675.8A EP3470934B1 (fr) 2017-10-10 2017-10-10 Système antichoc à blocage angulaire
JP2018179007A JP6557390B2 (ja) 2017-10-10 2018-09-25 角度係止耐衝撃システム
CN201811172481.9A CN109656120B (zh) 2017-10-10 2018-10-09 角向锁定防震系统
US16/156,115 US11169487B2 (en) 2017-10-10 2018-10-10 Angular locking shockproof system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17195675.8A EP3470934B1 (fr) 2017-10-10 2017-10-10 Système antichoc à blocage angulaire

Publications (2)

Publication Number Publication Date
EP3470934A1 EP3470934A1 (fr) 2019-04-17
EP3470934B1 true EP3470934B1 (fr) 2020-08-19

Family

ID=60080619

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17195675.8A Active EP3470934B1 (fr) 2017-10-10 2017-10-10 Système antichoc à blocage angulaire

Country Status (4)

Country Link
US (1) US11169487B2 (ja)
EP (1) EP3470934B1 (ja)
JP (1) JP6557390B2 (ja)
CN (1) CN109656120B (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3839661B1 (fr) * 2019-12-18 2022-08-10 ETA SA Manufacture Horlogère Suisse Dispositif amortisseur de chocs avec verrouillage angulaire
EP3910427A1 (fr) 2020-05-13 2021-11-17 ETA SA Manufacture Horlogère Suisse Kit de fixation

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH201334A (fr) * 1937-11-08 1938-11-30 Fritz Marti Dispositif de fixation élastique de palier.
CH296730A (fr) * 1950-10-19 1954-02-28 Parechoc Sa Dispositif de montage d'un contre-pivot d'axe d'horlogerie sur son support.
US2973618A (en) * 1958-01-11 1961-03-07 Morf Pierre Shock-absorbing pivot bearing
CH1394061A4 (ja) * 1961-11-29 1963-09-30
CH559384A (ja) * 1971-07-15 1975-02-28
JPH09113637A (ja) * 1995-10-16 1997-05-02 Orient Watch Co Ltd 携帯用機械時計の手巻ゼンマイ構造
DE602005025585D1 (de) * 2005-02-23 2011-02-10 Eta Sa Mft Horlogere Suisse Stoßdämpfende Uhrenlagerung
JP5455115B2 (ja) * 2009-10-07 2014-03-26 セイコーインスツル株式会社 時計用軸受、ムーブメントおよび携帯用時計
CH708090B1 (fr) * 2013-05-24 2017-06-15 Swatch Group Res & Dev Ltd Dispositif amortisseur de choc à baïonnette.
CN203930351U (zh) * 2013-12-20 2014-11-05 Eta瑞士钟表制造股份有限公司 减震轴承、包括该减震轴承的机芯及包括该机芯的钟表
CH709186A2 (fr) * 2014-01-31 2015-07-31 Eta Sa Manufacture Horlogère Suisse Dispositif d'affichage de la date pour une pièce d'horlogerie.
JP6710041B2 (ja) * 2014-11-27 2020-06-17 ロレックス・ソシエテ・アノニムＲｏｌｅｘ Ｓａ ヒゲゼンマイ固定システム
CN106557010A (zh) * 2015-09-29 2017-04-05 福州珂麦表业有限公司 机械表的防震摆轮游丝机构
EP3220211B1 (fr) 2016-03-14 2018-10-10 ETA SA Manufacture Horlogère Suisse Systeme antichoc a blocage angulaire

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
JP6557390B2 (ja) 2019-08-07
JP2019070643A (ja) 2019-05-09
CN109656120A (zh) 2019-04-19
CN109656120B (zh) 2020-12-11
US20190107810A1 (en) 2019-04-11
US11169487B2 (en) 2021-11-09
EP3470934A1 (fr) 2019-04-17

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