EP2977827A1 - Federgehäuse einer Uhr mit verbesserter Kraftübertragung - Google Patents

Federgehäuse einer Uhr mit verbesserter Kraftübertragung Download PDF

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Publication number
EP2977827A1
EP2977827A1 EP14177987.6A EP14177987A EP2977827A1 EP 2977827 A1 EP2977827 A1 EP 2977827A1 EP 14177987 A EP14177987 A EP 14177987A EP 2977827 A1 EP2977827 A1 EP 2977827A1
Authority
EP
European Patent Office
Prior art keywords
barrel
flange
elastic flange
torque
threshold
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
EP14177987.6A
Other languages
English (en)
French (fr)
Other versions
EP2977827B1 (de
Inventor
Polychronis Karapatis (Nakis)
Davide Sarchi
René Piguet
Benoît Junod
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 EP14177987.6A priority Critical patent/EP2977827B1/de
Priority to US14/799,842 priority patent/US9513601B2/en
Priority to JP2015141091A priority patent/JP6014727B2/ja
Priority to CN201510431371.XA priority patent/CN105319937B/zh
Publication of EP2977827A1 publication Critical patent/EP2977827A1/de
Priority to HK16109420.3A priority patent/HK1222001A1/zh
Application granted granted Critical
Publication of EP2977827B1 publication Critical patent/EP2977827B1/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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/16—Barrels; Arbors; Barrel axles
    • 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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/105—Driving mechanisms with mainspring having a form other than a helix
    • 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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/18—Constructions for connecting the ends of the mainsprings with the barrel or the arbor
    • 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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/18—Constructions for connecting the ends of the mainsprings with the barrel or the arbor
    • G04B1/185—Friction clutch between spring and spring cylinder

Definitions

  • the invention relates to a watch cylinder, comprising at least one spring cooperating at its inner end with a bung pivoting about a pivot axis, and at its outer end with an inner track of a drum barrel by a flange. slippery elastic.
  • the invention also relates to a watch movement comprising such a barrel, whose bung is arranged to cooperate with manual winding means.
  • the invention relates to a timepiece comprising such a movement, and / or at least one mechanism comprising such a cylinder.
  • the invention relates to the field of time barrels for energy storage comprising a spring.
  • the invention relates to the transmission of energy by a mainspring to a barrel drum via an element traditionally called a flange.
  • the barrel springs are connected to the drum via a fixed flange.
  • the transfer of force is via a slidable flange which allows to temporarily disconnect the end of the spring of the drum above a limit declutching torque.
  • the fixed flange makes it possible to maximize the properties of the spring, in particular the number of turns, but has the disadvantage of generating an overtorque during the maximum arming: the user does not feel that the spring is totally reassembled only when the torque becomes significantly most important.
  • This overtorque can be the cause of problems of fatigue (rupture) but also of chronometric problems.
  • the slippery flange is essential for automatic movements, however it is difficult for the user who manually goes back his movement to know, in the absence of indication of power reserve, when the barrel is fully reassembled.
  • the presence of a sliding flange generates a variation of the torque when the barrel is armed at the maximum between the upper slip moment (MGM) and the lower slip moment (MGI).
  • MGM upper slip moment
  • MMI lower slip moment
  • this system does not allow to control the torque from which the clutch is made.
  • these components, and in particular the barrel drum are often subject to wear during aging tests.
  • the invention proposes a new force transmission system between the flange and the barrel drum. It consists of a specific form of the barrel drum (non-cylindrical shape) and a so-called flexible flange, whose shape is adapted to that of the mainspring. Indeed, this flange must be able to transmit the force of the mainspring to the drum, and, according to the invention, has the possibility of deforming so that, when a given torque is reached, the flange can disengage from the drum and thus disarm the barrel spring slightly without rotating the drum.
  • the invention relates to a watch cylinder, comprising at least one spring cooperating at its inner end with a bung pivoting about a pivot axis, and at its outer end with an inner track of a drum of barrel by a slidable elastic strap, characterized in that said inner track and said sliding elastic flange are each of non-circular shape, and nested one inside the other in the free state of said slidable elastic flange, and are arranged in whereby at least one radially outward protruding outgrowth of said slidable elastic flange cooperates abutting with at least one radially inward projecting threshold of said inner race when the torque applied to said slidable elastic flange is less than a limit value of torque, and further characterized in that at least one said protrusion of said elastic flange slips nte is subjected to radial shrinkage when the torque applied to said sliding elastic flange is greater than said torque limit value, to allow the passage of said protrusion crossing said
  • the invention also relates to a watch movement comprising such a barrel, whose bung is arranged to cooperate with manual winding means.
  • the invention relates to a timepiece comprising such a movement, and / or at least one mechanism comprising such a cylinder.
  • the inner track 6 and the sliding elastic flange 8 are each of non-circular shape, and they are nested one inside the other in the free state of the slidable elastic flange 8.
  • the slidable elastic flange 8 comprises at least one protrusion 12 protruding radially outwards.
  • the inner track 6 has at least one threshold 11 protruding radially inwards towards the pivot axis D.
  • the inner track 6 and the elastic sliding flange 8 are arranged in such a way that at least one such protrusion 12 cooperates in abutment with at least one such threshold 11, when the torque applied to the slidable elastic flange 8 is less than a given value. torque limit.
  • At least one such protrusion 12 is subjected to radial shrinkage, due to the elasticity of the slidable elastic strap 8, when the torque applied to the slidable elastic strap 8 is greater than the limit value of torque, to allow the passage the protrusion 12 crossing the threshold 11, and allow an angular stroke of the flange 8 under the effect of torque until the next meeting between a threshold 11 and an outgrowth 12.
  • the slidable elastic flange 8 forms a closed contour.
  • the spring 2 winds progressively around the bung 4 until reaching the maximum armature, and the cooperation between such an outgrowth 12 of the slidable elastic flange 8 with such a threshold 11 of the inner track 6 of said barrel drum 7 forces the slidable elastic flange 8 to deform under the action of the applied torque, to effect a clutch under the action of which the slidable elastic flange 8 and the spring 2 advance a notch.
  • the relative shapes of the inner race 6 of the barrel drum 7 and the protrusion 12 of the slidable elastic flange 8 are arranged so that the clutch corresponds to a predetermined maximum torque.
  • the clutch is obtained only by an elastic deformation of a portion of the sliding elastic flange 8 greater than 50% of its periphery.
  • the figure 1 shows the spring 2 fully armed, which means that if the winding continues (manual or automatic), the shape flange 8 will deform to disengage the barrel drum 7.
  • a cylinder spring 2 of standard shape can either be connected to a flange 8 of independent form by a bonding process, brazing or welding, or preferably form with this flange 8 of a single piece, preferably in the same material.
  • the mainspring 2 winds progressively around the bung 4 until it reaches maximum arming.
  • the specific shape of the drum then forces the form flange 8 to deform so that the clutch takes place.
  • the relative shapes of the drum 7 and the shape flange 8 are optimized so that the clutch torque corresponds to the desired maximum torque, which is determined according to the properties of the mainspring and the coefficient of friction.
  • the inner track 6 has a plurality of peripheral housings 9 each having a bottom 10 located at the greatest distance DMAX of the pivot axis D. These housings 9 are each separated from its neighbor by such a threshold 11 located at the most small distance DMIN from the pivot axis D.
  • the sliding flange 8 is preferably and preferably integral with the spring 2 with which it then forms a one-piece assembly.
  • This sliding flange 8 comprises, in the non-limiting embodiments of Figures 1 to 5 , a plurality of such protrusions 12, each of which, in the free state, is of maximum radius RMAX with respect to the pivot axis D.
  • These protrusions 12 are each separated from its neighbor by a junction surface 13 comprising a zone of minimum radius RMIN with respect to the pivot axis D, the maximum radius RMAX in the free state being greater than the minimum distance DMIN and less than the maximum distance DMAX.
  • the joining surfaces 13 can be left-handed, concave or convex, or flat as on the figure 5 .
  • the invention is also usable with a barrel whose inner track 6 has only one housing 9, as visible on the figure 6 .
  • the figure 7 also illustrates a configuration with a single housing 9, but operating in an inverted manner, the sliding flange 8 still being in friction against a wall of the inner track 6, except when its protrusion 12 cooperates with the housing 9: the sensation for the user who manually raises his watch is similar, albeit reversed, and he feels just as distinctly the passage of a notch.
  • These two Figures 6 and 7 also illustrate a flange 8 with a single protrusion 12.
  • each passage of a threshold 11 by a protrusion 12 reduces the available torque at the drum 7 from a higher slip value MGS to a lower slip moment value MGI, which is less than the upper slip value MGS.
  • the inner race 6 comprises a plurality of peripheral housings 9 of cycloidal shape.
  • the figure 2 shows a flange 8 with five cycloids, but in another version it is possible to have more or less depending on the desired sizing, for example ten on the figure 4 .
  • the inner race 6 and the sliding elastic strap 8 are of identical shape and of homothetic dimensions.
  • the inner track 6 and the slidable elastic flange 8 are of different shapes, depending on the desired sizing. We can example combine the springs 2 of Figures 4 and 5 with the drum 7 of the figure 2 .
  • the inner track 6 has a first number of thresholds 11, the slidable elastic flange 8 has a second number of excrescences 12, and the second number is greater than or equal to the first number. In other variants, the inner track 6 has a first number of thresholds 11, the sliding elastic flange 8 has a second number of growths 12, and the second number is smaller than the first number.
  • the spring 2 is fixed at several points of the slidable elastic flange 8.
  • the invention is applicable to any type of barrel: movement drive barrel, or ringer barrel, or other.
  • the invention also relates to a clockwork movement 30 comprising such a barrel 1, whose plug 4 is arranged to cooperate with manual winding means 20, for example by means of a ratchet or the like.
  • the invention relates to a timepiece 40 comprising such a movement 30, and / or at least one mechanism comprising such a barrel 1, such as a striking mechanism, or a waking mechanism, or the like.
  • this timepiece is a watch.
EP14177987.6A 2014-07-22 2014-07-22 Federgehäuse einer Uhr mit verbesserter Kraftübertragung Active EP2977827B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP14177987.6A EP2977827B1 (de) 2014-07-22 2014-07-22 Federgehäuse einer Uhr mit verbesserter Kraftübertragung
US14/799,842 US9513601B2 (en) 2014-07-22 2015-07-15 Timepiece barrel with improved transmission of force
JP2015141091A JP6014727B2 (ja) 2014-07-22 2015-07-15 計時器用バレル
CN201510431371.XA CN105319937B (zh) 2014-07-22 2015-07-21 具有改进的力的传递的钟表发条盒
HK16109420.3A HK1222001A1 (zh) 2014-07-22 2016-08-08 具有改進的力的傳遞的鐘錶發條盒

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14177987.6A EP2977827B1 (de) 2014-07-22 2014-07-22 Federgehäuse einer Uhr mit verbesserter Kraftübertragung

Publications (2)

Publication Number Publication Date
EP2977827A1 true EP2977827A1 (de) 2016-01-27
EP2977827B1 EP2977827B1 (de) 2017-11-15

Family

ID=51211142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14177987.6A Active EP2977827B1 (de) 2014-07-22 2014-07-22 Federgehäuse einer Uhr mit verbesserter Kraftübertragung

Country Status (5)

Country Link
US (1) US9513601B2 (de)
EP (1) EP2977827B1 (de)
JP (1) JP6014727B2 (de)
CN (1) CN105319937B (de)
HK (1) HK1222001A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019207490A1 (fr) * 2018-04-26 2019-10-31 Patek Philippe Sa Geneve Barillet d'horlogerie et procede de modification de mouvement horloger

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3982209B1 (de) 2020-10-06 2023-06-07 The Swatch Group Research and Development Ltd Vorrichtung zur spannungsbegrenzung eines federhauses einer uhr
CN113697612B (zh) * 2021-09-16 2023-12-22 中国电子科技集团公司第三十八研究所 卷簧式多线缆防缠绕自动卷绕装置及雷达

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1495348A (en) * 1922-12-06 1924-05-27 Daniel E Odom Spring motor
US1720289A (en) * 1924-12-20 1929-07-09 Daniel E Odom Overwinding preventer for spring motors
EP2420899A1 (de) * 2010-08-19 2012-02-22 ETA SA Manufacture Horlogère Suisse Federhaus für Uhren mit automatischer Aufziehfunktion
EP2657794A1 (de) * 2012-04-25 2013-10-30 ETA SA Manufacture Horlogère Suisse Federwelle und Zugfeder

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2617248A (en) * 1948-12-31 1952-11-11 Foster H Brown Overwind preventer
CH288209A (de) * 1951-03-14 1953-01-15 Felsa Ag Uhrwerk mit einer ein arretierbares Aufzuggewicht aufweisenden automatischen Aufzugvorrichtung.
US2717527A (en) * 1953-05-20 1955-09-13 Harold L Rapp Watchmaking tool for assembling the mainspring assembly of a self-winding watch
US2993689A (en) * 1958-06-27 1961-07-25 Sandvik Steel Inc Power spring
US3018097A (en) * 1959-04-08 1962-01-23 Sandvik Steel Inc Power springs
US3012431A (en) * 1959-05-11 1961-12-12 Schmidt Michael Main spring and bridle torque gauge
CH494421A (fr) * 1968-01-26 1970-09-15 Omega Brandt & Freres Sa Louis Barillet pour pièce d'horlogerie à remontage automatique
CH610466B5 (en) * 1968-10-29 1979-04-30 Vimetal Sa Drive device for timepiece with spring and barrel
JPS59132928U (ja) * 1983-02-26 1984-09-06 平出　英行 ゼンマイ
DE602007002471D1 (de) * 2007-03-13 2009-10-29 Montres Breguet Sa Uhr mit Anzeige der Gangreserve
EP2390732A1 (de) * 2010-05-27 2011-11-30 Association Suisse pour la Recherche Horlogère Zugfeder für Federhaus
CH706432B1 (fr) * 2012-04-25 2016-12-15 Eta Sa Mft Horlogère Suisse Procédé de fabrication d'un arbre de barillet d'horlogerie, élément moteur de barillet, barillet, et pièce d'horlogerie.
CN203689018U (zh) * 2013-10-24 2014-07-02 Eta瑞士钟表制造股份有限公司 用于钟表发条盒的驱动元件和包括该驱动元件的钟表机构

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1495348A (en) * 1922-12-06 1924-05-27 Daniel E Odom Spring motor
US1720289A (en) * 1924-12-20 1929-07-09 Daniel E Odom Overwinding preventer for spring motors
EP2420899A1 (de) * 2010-08-19 2012-02-22 ETA SA Manufacture Horlogère Suisse Federhaus für Uhren mit automatischer Aufziehfunktion
EP2657794A1 (de) * 2012-04-25 2013-10-30 ETA SA Manufacture Horlogère Suisse Federwelle und Zugfeder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019207490A1 (fr) * 2018-04-26 2019-10-31 Patek Philippe Sa Geneve Barillet d'horlogerie et procede de modification de mouvement horloger

Also Published As

Publication number Publication date
US9513601B2 (en) 2016-12-06
HK1222001A1 (zh) 2017-06-16
US20160026152A1 (en) 2016-01-28
JP6014727B2 (ja) 2016-10-25
EP2977827B1 (de) 2017-11-15
JP2016024193A (ja) 2016-02-08
CN105319937A (zh) 2016-02-10
CN105319937B (zh) 2017-10-13

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