EP2887152A2 - Polygonale Spirale für Schwinger einer Uhr - Google Patents

Polygonale Spirale für Schwinger einer Uhr Download PDF

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Publication number
EP2887152A2
EP2887152A2 EP14193409.1A EP14193409A EP2887152A2 EP 2887152 A2 EP2887152 A2 EP 2887152A2 EP 14193409 A EP14193409 A EP 14193409A EP 2887152 A2 EP2887152 A2 EP 2887152A2
Authority
EP
European Patent Office
Prior art keywords
spiral
portions
int
ext
turn
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
EP14193409.1A
Other languages
English (en)
French (fr)
Other versions
EP2887152A3 (de
EP2887152B1 (de
Inventor
Thierry Conus
Jean-Luc Helfer
Laurent Jeanneret
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 EP14193409.1A priority Critical patent/EP2887152B1/de
Publication of EP2887152A2 publication Critical patent/EP2887152A2/de
Publication of EP2887152A3 publication Critical patent/EP2887152A3/de
Application granted granted Critical
Publication of EP2887152B1 publication Critical patent/EP2887152B1/de
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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
    • 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 polygonal spiral designed to reduce the risk of bonding between its turns to improve the operation of a resonator in which said spiral is used.
  • the object of the present invention is to overcome all or part of the disadvantages mentioned above by proposing an alternative to the usual spiral which avoids the gluing of the turns together.
  • the invention relates to a hairspring for a clock resonator comprising a solid blade wound on itself in several turns characterized in that at least a portion of the blade is formed by a succession of prismatic portions secured together to form a polygonal spiral.
  • the invention relates to a hairspring for a clock resonator comprising a solid blade wound on itself in several turns characterized in that the two opposite faces of each turn being in facing relation with at least one other turn, are asymmetrical and in that at least a part of one of said at least two opposite faces is formed by a succession of rectangular portions integral with each other to form a polygonal spiral.
  • the polygonal spiral thus obtained makes it possible to reduce geometrically the risk of bonding between turns, or even to strictly limit the contact surface between turns at the junction surface between two prismatic portions of the blade. or between two rectangular portions of the face of a turn.
  • the invention also relates to a timepiece characterized in that it comprises at least one hairspring according to one of the preceding variants.
  • the present invention relates to a spiral for the field of watchmaking. More specifically, the hairspring is intended to be mounted in a timepiece such as, for example, in cooperation with a beam to form a pendulum resonator - spiral forming the regulating member of the timepiece.
  • coil splices could be generated with the use of crystalline silicon spirals. Indeed, the heights of the turns facing each other are so smooth that adhesion can be generated simply by bringing two turns together, for example, by an impact on the timepiece. This adhesion can be further increased by contaminating the hairspring with impurities or lubricant during manufacture or wearing.
  • the hairspring 1, 11, 21, 31, 41, 51, 61, 71 according to the invention comprises a blade 3, 13, 23, 33, 43, 53, 63, 73 solid, that is to say not including no recess or openwork, including a length L, a height H and a thickness E.
  • the blade 3, 13, 23, 33, 43, 53, 63, 73 is wound on itself in several turns S 1 , S 2 , S ' 1 , S' 2 , S 3 , S ext , S int .
  • At least a portion of the blade 3, 23, 43, 63 is formed by a succession of portions P 1 , P 2 , P x , P ' x , P y , P y , P z prismatic integral with each other to obtain a polygonal spring 1, 21, 41, 61.
  • the polygonal spring 1, 21, 41, 61 thus obtained makes it possible to geometrically reduce the risk of bonding between turns S 1 , S 2 , S ' 1 , S' 2 , S 3 , S ext , S int or even to strictly limit the contact surface between turns S 1 , S 2 , S ' 1 , S' 2 , S 3 , S ext , S int at the junction surface between two portions P 1 , P 2 , P x , P ' x , P y , P ' y , P z prismatic.
  • each junction forms an angle ⁇ between each portion P, as in the example of figure 1 the angle ⁇ z1 between the portion P z and the portion P z + 1 .
  • the turn S 3 has, at each junction, a contact surface 5 substantially vertical and parallel to the height H which faces the turn immediately consecutively.
  • the blade 3, 23, 43, 63 to be wound on itself, at least two prismatic portions P 1 , P 2 , P x , P ' x , P y , P' y , P z adjacent regions form, preferably according to the invention, an obtuse angle ⁇ , that is to say an angle ⁇ less than 180 ° but greater than 90 °.
  • each prismatic portion P 1 , P 2 , P x , P ' x , P y , P' y , P z is secured to at least one other prismatic portion adjacent at an obtuse angle.
  • Such an example is illustrated in figures 2 and 5 .
  • the lengths of the portions P 1 , P 2 , P x , P ' x , P y , P' y , P z prismatic forming the inner turn of said hairspring may be larger than the lengths of the portions P 1 , P 2 , P x , P ' x , P y , P prismatic y , P z forming the outer turn of said hairspring.
  • the lengths of the portions P 1 , P 2 , P x , P ' x , P y , P' y , P z prismatic decreases, continuously, the first prismatic portion of the inner turn to the last prismatic portion of the outer turn of said hairspring regardless of the winding state of the hairspring.
  • Such an example is illustrated in figures 3 and 6 .
  • the opposite faces F int , F ext of each prismatic portion of a turn facing each other with at least one other turn are preferably symmetrical, that is to say parallel.
  • the opposing faces F int , F ext of each prismatic portion of a turn could also be asymmetrical so that the section formed by the height H on the thickness E is continuously variable, that is to say increases and / or decreases, permanently on each prismatic portion.
  • the asymmetry between the two opposing faces F int , F ext of each prismatic portion would induce a continuous variation of the thickness E over the length L of each prismatic portion.
  • the two polygonal bases of the prismatic portions could be, for example, hexagonal or trapezoidal.
  • the two opposite faces F int , F ext of each turn facing each other with at least one other turn are asymmetrical as illustrated in FIG. examples of Figures 7 to 10 representing top views. It is therefore understood that the section formed by the height H on the thickness E is continuously variable, that is to say increases or decreases continuously along the length of the spiral blade. Indeed, the asymmetry between the two opposing faces Fint, F ext induces a continuous variation of the thickness E over the length of the spiral blade.
  • At least a portion of one of said at least two opposing faces F int , F ext is formed by a succession of rectangular portions integral with one another in order to form a polygonal spring 11, 31, 51, 71.
  • the polygonal spring 11, 31, 51, 71 thus obtained makes it possible to reduce geometrically the risk of bonding between the turns between the inner turn S int and the outer turn S ext , or even to strictly limit the contact surface between turns on the surface.
  • junction symbolized by a dot in Figures 7 to 10 ) between two rectangular portions. Indeed, as for the first embodiment, each junction forms an angle ⁇ between each rectangular portion. It is thus clear that the internal turn S int has, at each junction, a contact surface substantially vertical and parallel to the height H which faces the turn immediately consecutive.
  • the blade 13, 33, 53, 73 to be wound on itself at least two adjacent rectangular portions form, preferably according to the invention, an obtuse angle ⁇ , that is to say a angle ⁇ less than 180 ° but greater than 90 °.
  • ⁇ an obtuse angle
  • all the portions do not have to be strictly non-aligned and some consecutive portions may have the utility of being integral at an angle ⁇ , for example, equal to 180 °.
  • each rectangular portion is secured to at least one other rectangular portion adjacent at an obtuse angle as illustrated in the examples of FIGS. Figures 7 to 10 .
  • the lengths of the rectangular portions forming said one of said at least two opposite faces may not be constant.
  • the outer face F ext of each turn is formed by a succession of rectangular portions integral with each other (each junction being symbolized by a point), the length of each rectangular portion being constant.
  • the lengths of the rectangular portions increase, continuously, from the first rectangular portion of the outer face F ext of the inner turn S int to the last rectangular portion of the outer face F ext of the outer turn S ext of the spiral 31, 71.
  • each face F int , F ext opposite of each turn being asymmetrical, that is to say non-parallel the other face is free as to its geometry unlike the first embodiment in which the faces F int , F ext opposite of each prismatic portion are preferentially symmetrical, that is to say parallel.
  • the other of said at least two opposing faces F int , F ext is formed by a single spiral-shaped surface such as a usual hairspring.
  • the spiral 11 has an inner face F int formed by a single spiral-shaped surface while its outer face F ext is formed by a succession of rectangular portions integral with each other (each junction being symbolized by a point), the length of each rectangular portion being constant. It is therefore understood that geometrically the thickness E of the blade 13 is not constant.
  • the spiral 21 has an internal face F int formed by a single spiral-shaped surface while its outer face F ext is formed by a succession of rectangular portions integral with each other, the length of each rectangular portion is not constant. More precisely, the lengths of the rectangular portions increase, continuously, from the first rectangular portion of the outer face F ext of the inner turn S int to the last rectangular portion of the outer face F ext of the outer turn S ext of spiral 31. It is therefore understood that geometrically the thickness E of the blade 33 is not constant either.
  • the other of said at least two opposite faces F int , F ext may also be formed by a succession of rectangular portions integral with each other as for the first face.
  • each inner face F int and outer F ext of the spiral 51 is formed by a succession of rectangular portions integral with each other (each junction being symbolized by a point), the length of each rectangular portion being constant.
  • the constant length chosen for each face F int , F ext is not identical.
  • the constant length of each rectangular portion of the internal face F int is smaller than the constant length of each rectangular portion of the outer face F ext .
  • the thickness E of the blade 53 is not constant.
  • each inner face F int and outer F ext of the spiral 71 is formed by a succession of rectangular portions integral with each other (each junction being symbolized by a point), the length of each rectangular portion being not constant. More precisely, for each face F int , F ext , the lengths of the rectangular portions increase, continuously, from the first rectangular portion of the internal turn S int to the last portion rectangular of the outer turn S ext of the spiral 71. Note that the minimum length chosen for each face F int , F ext is not identical. Indeed, the minimum length of the first rectangular portion of the inner face F int is smaller than the minimum length of the first rectangular portion of the outer face F ext .
  • the thickness E of the blade 73 is not constant.
  • 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 embodiments, variants or alternatives are combinable.
  • part of the length of the hairspring could be formed by one of the embodiments and another part of the length of the hairspring by another embodiment.
  • the polygonal spring 1, 11, 21, 31, 41, 51, 61, 71 may also comprise an internal turn S int which is integral with a ferrule arranged to be fixed to an axis.
  • an example is illustrated in figure 4 .
  • the ferrule 65 substantially shaped clover has a hole 64 for, for example, to receive a balance shaft.
  • the thickness E of the blade 3, 13, 23, 33, 43, 53, 63, 73 of the spiral 1, 11, 21, 31, 41, 51, 61, 71 is locally modified, for example thickened, in order to modify, for example increase, locally the rigidity of the blade 3, 13, 23, 33, 43, 53, 63, 73.
  • the hairspring 1, 11, 21, 31, 41, 51, 61, 71 may be one-piece, that is to say that the blade 3, 13, 23, 33 , 43, 53, 63, 73 is formed without discontinuity of material.
  • a hairspring may be formed of a material comprising silicon, that is to say, for example, monocrystalline silicon, polycrystalline silicon, doped monocrystalline silicon, doped polycrystalline silicon, doped or non-doped silicon carbide, doped or non-doped silicon nitride, doped or non-doped silicon oxide such as quartz or silica. Indeed, the anisotropic etching of such materials can be carried out wet or dry.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Springs (AREA)
  • Surgical Instruments (AREA)
  • Adornments (AREA)
  • Micromachines (AREA)
EP14193409.1A 2013-12-16 2014-11-17 Polygonale Spirale für Schwinger einer Uhr Active EP2887152B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14193409.1A EP2887152B1 (de) 2013-12-16 2014-11-17 Polygonale Spirale für Schwinger einer Uhr

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13197318.2A EP2884346A1 (de) 2013-12-16 2013-12-16 Polygonale Spirale für Schwinger einer Uhr
EP14193409.1A EP2887152B1 (de) 2013-12-16 2014-11-17 Polygonale Spirale für Schwinger einer Uhr

Publications (3)

Publication Number Publication Date
EP2887152A2 true EP2887152A2 (de) 2015-06-24
EP2887152A3 EP2887152A3 (de) 2016-06-08
EP2887152B1 EP2887152B1 (de) 2023-01-04

Family

ID=49816833

Family Applications (2)

Application Number Title Priority Date Filing Date
EP13197318.2A Withdrawn EP2884346A1 (de) 2013-12-16 2013-12-16 Polygonale Spirale für Schwinger einer Uhr
EP14193409.1A Active EP2887152B1 (de) 2013-12-16 2014-11-17 Polygonale Spirale für Schwinger einer Uhr

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP13197318.2A Withdrawn EP2884346A1 (de) 2013-12-16 2013-12-16 Polygonale Spirale für Schwinger einer Uhr

Country Status (5)

Country Link
US (1) US9268307B2 (de)
EP (2) EP2884346A1 (de)
JP (1) JP5978282B2 (de)
CN (2) CN104714393B (de)
HK (1) HK1211710A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1445670A1 (de) * 2003-02-06 2004-08-11 ETA SA Manufacture Horlogère Suisse Spiralfeder der Resonatorunruh und Fabrikationsmethode
EP2884346A1 (de) * 2013-12-16 2015-06-17 ETA SA Manufacture Horlogère Suisse Polygonale Spirale für Schwinger einer Uhr
EP3159748B1 (de) * 2015-10-22 2018-12-12 ETA SA Manufacture Horlogère Suisse Spiralfeder mit reduziertem platzbedarf und variablem durchmesser
EP3181940B2 (de) * 2015-12-18 2023-07-05 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Herstellungsverfahren einer spiralfeder mit einer vorbestimmten steifigkeit durch lokalisierte wegnahme von material
EP4398047A1 (de) 2023-01-03 2024-07-10 Damasko Präzisionstechnik GmbH & Co. KG Optisches messverfahren für archimedische flachspiralen und spiralfeder mit dafür optimierter geometrie

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US570394A (en) * 1896-10-27 Hair-spring for watches
CH483046A (fr) * 1966-12-12 1970-01-30 Holding Favre Leuba S A Dispositif de fixation de l'extrémité intérieure d'un spiral à l'arbre du balancier d'un mouvement d'horlogerie
EP1445670A1 (de) * 2003-02-06 2004-08-11 ETA SA Manufacture Horlogère Suisse Spiralfeder der Resonatorunruh und Fabrikationsmethode
ATE466315T1 (de) * 2004-07-02 2010-05-15 Nivarox Sa Spiralfeder mit modifizierter aussenkurve
EP1791039A1 (de) * 2005-11-25 2007-05-30 The Swatch Group Research and Development Ltd. Spiralfeder aus athermisches Glas für ein Uhrwerk und Herstellungsverfahren dafür
EP2151722B8 (de) * 2008-07-29 2021-03-31 Rolex Sa Spiralfeder für Spiralfeder-Unruh-Resonator
EP2196867A1 (de) * 2008-12-15 2010-06-16 Montres Breguet S.A. Spirale mit Kurvenerhöhung aus Material auf Siliziumbasis
EP2233989A1 (de) * 2009-03-24 2010-09-29 Manufacture et fabrique de montres et chronomètres Ulysse Nardin Le Locle SA Spiralfeder und ihre Reguliereinrichtung
CH701783B1 (fr) * 2009-09-07 2015-01-30 Manuf Et Fabrique De Montres Et Chronomètres Ulysse Nardin Le Locle S A Ressort spiral de mouvement de montre.
CH702156B1 (fr) * 2009-11-13 2017-08-31 Nivarox Far Sa Résonateur balancier-spiral pour une pièce d'horlogerie.
US8562206B2 (en) * 2010-07-12 2013-10-22 Rolex S.A. Hairspring for timepiece hairspring-balance oscillator, and method of manufacture thereof
EP2434353B1 (de) * 2010-09-28 2018-01-10 Montres Breguet SA Antischwingungsspirale für Uhrenhemmungen
EP2687917A3 (de) * 2012-07-17 2018-01-24 Master Dynamic Limited Spiralfeder für Uhr und Spiralfederausgestaltung für Konzentrizität
EP2884346A1 (de) * 2013-12-16 2015-06-17 ETA SA Manufacture Horlogère Suisse Polygonale Spirale für Schwinger einer Uhr

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
EP2884346A1 (de) 2015-06-17
HK1211710A1 (en) 2016-05-27
JP2015118086A (ja) 2015-06-25
CN104714393A (zh) 2015-06-17
JP5978282B2 (ja) 2016-08-24
US9268307B2 (en) 2016-02-23
CN204389879U (zh) 2015-06-10
CN104714393B (zh) 2018-01-02
EP2887152A3 (de) 2016-06-08
US20150168916A1 (en) 2015-06-18
EP2887152B1 (de) 2023-01-04

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