EP2613206A1 - Spirale mit zwei Spiralfedern mit verbessertem Isochronismus - Google Patents

Spirale mit zwei Spiralfedern mit verbessertem Isochronismus Download PDF

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Publication number
EP2613206A1
EP2613206A1 EP12194292.4A EP12194292A EP2613206A1 EP 2613206 A1 EP2613206 A1 EP 2613206A1 EP 12194292 A EP12194292 A EP 12194292A EP 2613206 A1 EP2613206 A1 EP 2613206A1
Authority
EP
European Patent Office
Prior art keywords
spiral
spring
spiral spring
fastener
counterweights
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
EP12194292.4A
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English (en)
French (fr)
Other versions
EP2613206B1 (de
Inventor
Jean-Luc Helfer
Kaspar Trümpy
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
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Montres Breguet SA
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Publication date
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Publication of EP2613206A1 publication Critical patent/EP2613206A1/de
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    • 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
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/066—Manufacture of the spiral spring

Definitions

  • the invention relates to a hairspring used to form a pendulum - balance resonator whose curvature allows a substantially immobile center of mass development.
  • EP 2 184 652 , EP 2 196 867 and EP 2,105,807 explain how to manufacture curved spirals in micro-machinable materials respectively with three parts, two parts or integrally. These documents are incorporated by reference into the present description.
  • the object of the present invention is to overcome all or part of the disadvantages mentioned above by proposing a hairspring respecting predetermined conditions capable of reducing the displacement of the center of mass of the hairspring in contraction and expansion.
  • a hairspring can be manufactured respecting predetermined conditions in order to reduce the displacement of the center of mass of the hairspring in contraction and expansion.
  • This slight or negligible displacement advantageously makes it possible to reduce the belly of the anisochronism curves to a value that is substantially equal to or less than 0.5 sj -1 .
  • the spiral anisochronism slope can be customized to compensate for that given by the exhaust delay.
  • the invention relates to a resonator for a timepiece comprising a balance characterized in that the rocker cooperates with a hairspring according to one of the previous variants.
  • the hairspring is generally adapted so that its variation as a function of the same amplitude is substantially opposite that of the exhaust.
  • the spiral is adapted so that its variation is minimal between the four vertical positions.
  • a hairspring 1 comprising a first hairspring 3 whose curve extends in a first plane, a second hairspring 5 whose curve extends in a second plane parallel to the foreground .
  • Each end of spiral spring 3, 5 is preferably secured by a fastener 4 to form a double spiral series.
  • the curve of the first spiral spring 3 and the curve of the second spiral spring 5 preferably comprise, each step, a continuously variable pitch and are symmetrical with respect to a line A parallel to the first and second passing planes. by the center of the median plane P of projection of the fastener 4 and the center of the axis of the balance.
  • the end 6 of the spiral spring 3 is connected to a ferrule 10 in one piece and the end 7 of the spiral spring 5, which is opposite the fastener 4, is arranged to cooperate with a stud (not shown ).
  • the main faces 11, 12 of the fastener 4 are substantially parallel to the line of symmetry A.
  • each spiral spring 3, 5 preferably comprises at least two counterweights 8-9, 8'-9 'which are symmetrical along the same line A as the bends in order to compensate for the unbalance formed by the mass of the fastener 4 and customize the anisochronism slope of the hairspring 1.
  • the masses of the counterweights 8, 8 'and 9, 9' are substantially equal and their sum is greater or lesser than that of the fastener 4 according to the difference distance between, on the one hand, the fastener 4 and the balance shaft, and, on the other hand, the counterweights 8, 8 ', 9, 9' and said balance shaft.
  • each counterweight 8, 8 ', 9, 9' is substantially H-shaped, the parallel arms of the H being substantially parallel to the local curvature of the spiral spring 3, 5 with which it is associated.
  • these shapes in H provide a local extra thickness of each spiral spring 3, 5 which locally increases their stiffness.
  • the stiffnesses and / or the masses brought locally by the counterweights 8, 8 ', 9, 9' and the fastener 4 are used to modify the anisochronism slope of the hairspring 1.
  • a simulation of the belly and the slope of anisochronism of the spiral 1 according to the invention was carried out by varying the length of the fastener 4 or the counterweights 8, 8 ', 9, 9' along the spiral 1: Tie 4 Counterweight 9,9 ' Counterweight 8, 8 ' Slope Belly [Mm] [Mm] [Mm] [S / d / 100 °] [S / d] 0.22 0.1 0.1 -8.54 0.26 0.1 0.1 0.1 -7.51 0.35 0.22 0.04 0.22 -12.97 1.14 0.22 0.22 0.04 -7.88 0.54 0.22 0.44 0.22 -5.49 0.22 0.22 0.33 0.22 -5.05 0.29 0.22 0.33 0.25 -4.3 0.49
  • the length represents the length of the portion of the hairspring 1 which is stiffened by the fastener 4 or the counterweight 8, 8 ', 9, 9'.
  • the mass of the fastener 4 and therefore the counterweights 8, 8 ', 9, 9' can also be modified to adapt the slope of anisochronism: Tie 4 Counterweight 9, 9 ' Counterweight 8, 8 ' Tie 4 Slope Belly [Mm] [Mm] [Mm] [mm 3 ] [S / d / 100 °] [S / d] 0.22 0.1 0.1 0.016 -8.54 0.26 0.22 0.1 0.1 0,008 -5.58 0.56 0.22 0.1 0.1 0,002 -4.58 0.53
  • the anisochronism slope of the hairspring 1 can be customized to compensate for that given by the exhaust delay.
  • the present invention is not limited to the illustrated example but is susceptible of various variations and modifications that will occur to those skilled in the art.
  • other framing criteria may be provided such as a limitation of the ratio between the inner radius and the outer radius so that the ends of the spiral springs are not too close to the point of origin where must be present the balance shaft.
  • the inner coil 7 of the second spiral spring 5 comprises, preferably, a shifter 13 arranged to attach to a peg (not shown) in the plane of the second spiral spring. 5.
  • the shifting device 13 is particularly useful for preventing particular shapes of the hairspring 1 make it impossible to mount because of the proximity of its free end 7 relative to the balance shaft.
  • the shifter 13 comprises a part 14 in extension of the inner coil 7 of the second spiral spring 5.
  • the piece 14 is more rigid than the second spiral spring 5 so as not to provide an elastic torque to the balance spring - spiral resonator.
  • the part 14 is preferably made more rigid by a greater thickness, such as for example at least three times greater, with respect to the thickness of the second spiral spring 5, that is to say the width of its blade . It is therefore understood that the shape of the part 14 is partly adapted according to the curvature of the turns of the second spiral spring 5 so that no contact takes place.
  • the piece 14 is integral with the second spiral spring 5 and, preferably, that the latter comprises a height substantially equal to that of the piece 14, it is to say that the latter is contained in the same plane.
  • the extension piece 14 is furthermore preferably connected to the inner coil 7 of the second spiral spring 5 by means of a substantially U-shaped bend 15 in order to further limit the supply of a any elastic couple. It is understood that the extension piece 14 and the elbow 15 can virtually bring the fixed point formed by the peak (not shown) at the end 7 of the hairspring 1.
  • the part 14 has a recess 16, blind or through, of substantially asymmetrical section and intended to cooperate with the peak (not shown).
  • the piece 14 may be partially perforated by holes 19 to reduce its mass and thus make it less penalizing its weight when mounting the hairspring 1.
  • the inner coil 6 of the first spiral spring 3 comprises an enlarging device 17 of the ferrule 10 in the plane of the first spiral spring 3.
  • the enlargement device 17 is particularly useful for preventing particular shapes spiral 1 make it impossible to mount because of the proximity of its free end 6 relative to the balance shaft. It is therefore understood that without the enlarging device 17, the shell 10 would necessarily be of smaller diameter because of the proximity of the inner coil 6.
  • the enlarging device 17 comprises a bead 18 extending the inner coil 6 of the first spiral spring 3, the bead 18 being more rigid than the first spiral spring 3 so as not to provide an elastic torque.
  • the bead 18 is preferably made more rigid by a greater thickness relative to the thickness of the first spiral spring 3, that is to say the width of its blade.
  • the bead 18 is substantially U-shaped.
  • the bead 18 is preferably integral with the first spiral spring 3.
  • a hairspring can be manufactured respecting predetermined conditions in order to reduce the displacement of the center of mass of the hairspring in contraction and expansion.
  • This slight or negligible displacement advantageously makes it possible to reduce the belly of the anisochronism curves to a value that is substantially equal to or less than 0.5 sj -1 .
  • the spiral anisochronism slope can be customized to compensate for that given by the exhaust delay.
  • Figures 9 to 11 defines a very robust axis A of symmetry which makes it possible to minimize the chronometric defects induced by disturbances in the direction orthogonal to the axis A. It is therefore understood that it is possible to maximize the manufacturing accuracy in the fastener-counterweight direction, that is to say the axis A, as the only critical direction instead of two usually.
  • the present invention is not limited to the illustrated example but is susceptible of various variations and modifications that will occur to those skilled in the art.
  • the counterweights 8, 8 ', 9, 9' may be of different shape and / or geometry without departing from the scope of the invention. It is also possible to increase their number and / or distribute them in a different way, that is to say in particular that the counterweights 8, 8 ', 9, 9' are not necessarily symmetrical along the line A as the curvatures .
  • each spiral spring 3, 5 to add two additional counterweights, that is to say to have four counterweights, in order to distribute them substantially at 90 ° one another.
  • the spiral when it is silicon, it can be at least partially covered with silicon dioxide to make it less sensitive to temperature variations and mechanical shocks. It is then understood that the sectional variation of the counterweights 8, 8 ', 9, 9' also modifies the local thermal compensation of the spiral.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Springs (AREA)
  • Stringed Musical Instruments (AREA)
EP12194292.4A 2012-01-05 2012-11-26 Spirale mit zwei Spiralfedern mit verbessertem Isochronismus Active EP2613206B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12150230 2012-01-05

Publications (2)

Publication Number Publication Date
EP2613206A1 true EP2613206A1 (de) 2013-07-10
EP2613206B1 EP2613206B1 (de) 2022-05-11

Family

ID=47215462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12194292.4A Active EP2613206B1 (de) 2012-01-05 2012-11-26 Spirale mit zwei Spiralfedern mit verbessertem Isochronismus

Country Status (6)

Country Link
US (1) US9004748B2 (de)
EP (1) EP2613206B1 (de)
JP (1) JP5563674B2 (de)
CN (1) CN103197526B (de)
HK (1) HK1187118A1 (de)
TW (1) TWI569115B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3181940B1 (de) 2015-12-18 2019-02-06 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Herstellungsverfahren einer spiralfeder mit einer vorbestimmten steifigkeit durch lokalisierte wegnahme von material
EP3181938B1 (de) 2015-12-18 2019-02-20 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Herstellungsverfahren einer spiralfeder mit einer vorbestimmten steifigkeit durch wegnahme von material

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9658598B2 (en) * 2012-07-17 2017-05-23 Master Dynamic Limited Hairspring for a time piece and hairspring design for concentricity
HK1186057A2 (en) * 2013-01-14 2014-03-07 Master Dynamic Ltd Stress-relief elastic structure of hairspring collet
EP2884347A1 (de) * 2013-12-16 2015-06-17 ETA SA Manufacture Horlogère Suisse Spiralfeder mit Vorrichtung zum Verhindern der gegenseitigen Annäherung der Federwindungen
EP2916177B1 (de) * 2014-03-05 2018-11-07 Nivarox-FAR S.A. Spirale, die mit einer Federscheibe gesichert werden muss
EP3081996B1 (de) * 2015-04-16 2019-02-27 Montres Breguet S.A. Spirale aus mikrobearbeitbarem material mit isochronismus-korrektur
JP6629854B2 (ja) * 2015-06-15 2020-01-15 シチズン時計株式会社 時計の調速装置
EP3159748B1 (de) * 2015-10-22 2018-12-12 ETA SA Manufacture Horlogère Suisse Spiralfeder mit reduziertem platzbedarf und variablem durchmesser
WO2017163148A1 (fr) * 2016-03-23 2017-09-28 Patek Philippe Sa Geneve Oscillateur balancier-spiral pour piece d'horlogerie
JP2017194286A (ja) * 2016-04-18 2017-10-26 セイコーエプソン株式会社 ヒゲゼンマイ、時計ムーブメントおよび時計
JP6789140B2 (ja) * 2017-01-31 2020-11-25 セイコーインスツル株式会社 温度補償型てんぷ、ムーブメント及び時計
EP3534222A1 (de) * 2018-03-01 2019-09-04 Rolex Sa Herstellungsverfahren eines thermokompensierten oszillators
EP3627238A1 (de) * 2018-09-21 2020-03-25 Nivarox-FAR S.A. Elastisches halterungsorgan für die befestigung einer uhrenkomponente auf einem halteelement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2104006A1 (de) * 2008-03-20 2009-09-23 Nivarox-FAR S.A. Monoblock-Doppelspirale und ihr Herstellungsverfahren
EP2105807A1 (de) 2008-03-28 2009-09-30 Nivarox-FAR S.A. Monoblockspirale zur Erhöhung der kurve und ihr Herstellungsverfahren
EP2184652A1 (de) 2008-11-06 2010-05-12 Montres Breguet SA Spiralfeder mit Endkurvenerhöhung aus mikro-bearbeitbarem Material
EP2196867A1 (de) 2008-12-15 2010-06-16 Montres Breguet S.A. Spirale mit Kurvenerhöhung aus Material auf Siliziumbasis

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Publication number Priority date Publication date Assignee Title
US30247A (en) * 1860-10-02 Watch
US109826A (en) * 1870-12-06 Improvement in the hair-springs of watches
US570394A (en) * 1896-10-27 Hair-spring for watches
US469914A (en) * 1892-03-01 Watch balance-spring
EP1886194A2 (de) * 2005-05-14 2008-02-13 Gideon Levingston Unruhe, regulierte unruhebaugruppe und herstellungsverfahren dafür
GB0509886D0 (en) * 2005-05-14 2005-06-22 Levingston Gideon R Balance wheel mass and regulating element assembly and balance wheel and balance spring manufacturing processes for horolongical oscillator mechanisms
EP2151722B8 (de) * 2008-07-29 2021-03-31 Rolex Sa Spiralfeder für Spiralfeder-Unruh-Resonator
CH702062B1 (fr) * 2009-10-26 2022-01-31 Mft Dhorlogerie Audemars Piguet Sa Organe régulateur comportant au moins deux balanciers, un mouvement de montre ainsi qu'une pièce d'horlogerie comportant un tel organe.
CH702156B1 (fr) * 2009-11-13 2017-08-31 Nivarox Far Sa Résonateur balancier-spiral pour une pièce d'horlogerie.
CH703172B1 (fr) * 2010-05-18 2014-11-14 Montres Breguet Sa Spiral à élévation de courbe en silicium.
EP2397919B1 (de) * 2010-06-21 2017-11-08 Montres Breguet SA Herstellungsverfahren einer Spiralfederanordnung einer Uhr aus mikro-bearbeitbarem Material oder Silizium
EP2405312A1 (de) * 2010-07-09 2012-01-11 Montres Breguet S.A. Spiralfeder für Unruh mit zwei Stufen und unbeweglichem Massenzentrum

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2104006A1 (de) * 2008-03-20 2009-09-23 Nivarox-FAR S.A. Monoblock-Doppelspirale und ihr Herstellungsverfahren
EP2105807A1 (de) 2008-03-28 2009-09-30 Nivarox-FAR S.A. Monoblockspirale zur Erhöhung der kurve und ihr Herstellungsverfahren
EP2184652A1 (de) 2008-11-06 2010-05-12 Montres Breguet SA Spiralfeder mit Endkurvenerhöhung aus mikro-bearbeitbarem Material
EP2196867A1 (de) 2008-12-15 2010-06-16 Montres Breguet S.A. Spirale mit Kurvenerhöhung aus Material auf Siliziumbasis

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3181940B1 (de) 2015-12-18 2019-02-06 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Herstellungsverfahren einer spiralfeder mit einer vorbestimmten steifigkeit durch lokalisierte wegnahme von material
EP3181938B1 (de) 2015-12-18 2019-02-20 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Herstellungsverfahren einer spiralfeder mit einer vorbestimmten steifigkeit durch wegnahme von material

Also Published As

Publication number Publication date
CN103197526A (zh) 2013-07-10
JP2013140161A (ja) 2013-07-18
US20130176834A1 (en) 2013-07-11
TW201341988A (zh) 2013-10-16
HK1187118A1 (zh) 2014-03-28
CN103197526B (zh) 2015-10-21
TWI569115B (zh) 2017-02-01
JP5563674B2 (ja) 2014-07-30
EP2613206B1 (de) 2022-05-11
US9004748B2 (en) 2015-04-14

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