EP2887152A2 - Polygonal hairspring for a timepiece resonator - Google Patents

Polygonal hairspring for a timepiece resonator 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
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EP
European Patent Office
Prior art keywords
spiral
portions
int
ext
turn
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Granted
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EP14193409.1A
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German (de)
French (fr)
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EP2887152B1 (en
EP2887152A3 (en
Inventor
Thierry Conus
Jean-Luc Helfer
Laurent Jeanneret
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ETA SA Manufacture Horlogere Suisse
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ETA SA Manufacture Horlogere Suisse
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Priority to EP14193409.1A priority Critical patent/EP2887152B1/en
Publication of EP2887152A2 publication Critical patent/EP2887152A2/en
Publication of EP2887152A3 publication Critical patent/EP2887152A3/en
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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 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)
  • Micromachines (AREA)
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Abstract

Spiral (1, 21, 41, 61) pour un résonateur horloger comportant une lame (3, 23, 43, 63) enroulée sur elle-même selon plusieurs spires (S 1 , S 2 , S' 1 , S' 2 , S 3 , S int ). La lame (3, 23, 43, 63) est formée par une succession de portions (P 1 , P 2 , P x , P' x , P y , P' y , P z ) prismatiques solidaires entre elles ou l'une desdites au moins deux faces (F int , F ext ) opposées étant formée par une succession de portions rectangulaires solidaires entre elles afin de former un spiral (1, 21, 41, 61) polygonal. Ledit spiral est destiné au domaine des résonateurs pour pièce d'horlogerie.Spiral (1, 21, 41, 61) for a clock resonator comprising a blade (3, 23, 43, 63) wound on itself in several turns (S 1, S 2, S '1, S' 2, S 3, S int). The blade (3, 23, 43, 63) is formed by a succession of prismatic portions (P 1, P 2, P x, P 'x, P y, P' y, P z) integral with one another or one said at least two opposite faces (F int, F ext) being formed by a succession of rectangular portions integral with each other to form a polygonal spring (1, 21, 41, 61). Said spiral is intended for the field of timepiece resonators.

Description

Domaine de l'inventionField of the invention

L'invention se rapporte à un spiral polygonal destiné à diminuer le risque de collement entre ses spires afin d'améliorer la marche d'un résonateur dans lequel ledit spiral est utilisé.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.

Arrière-plan de l'inventionBackground of the invention

Il est habituel dans l'horlogerie de former des spiraux dont l'enroulement de la lame épouse sensiblement la trajectoire d'une spirale d'Archimède. Toutefois, il a été remarqué que des collements de spires pouvaient être engendrés depuis l'utilisation en horlogerie des nouveaux matériaux comme par exemple du silicium cristallin.It is usual in watchmaking to form spirals whose winding of the blade substantially follows the trajectory of an Archimedean spiral. However, it has been noticed that winding glitches could be generated since the use in watchmaking of new materials such as crystalline silicon.

Résumé de l'inventionSummary of the invention

Le but de la présente invention est de pallier tout ou partie les inconvénients cités précédemment en proposant une alternative au spiral habituel qui évite le collement des spires entre elles.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.

A cet effet, selon un premier mode de réalisation, l'invention se rapporte à un spiral pour un résonateur horloger comportant une lame pleine enroulée sur elle-même selon plusieurs spires caractérisé en ce qu'au moins une partie de la lame est formée par une succession de portions prismatiques solidaires entre elles afin de former un spiral polygonal.For this purpose, according to a first embodiment, 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.

Selon un deuxième mode de réalisation, l'invention se rapporte à un spiral pour un résonateur horloger comportant une lame pleine enroulée sur elle-même selon plusieurs spires caractérisé en ce que les deux faces opposées de chaque spire étant en vis-à-vis avec au moins une autre spire, sont asymétriques et en ce qu'au moins une partie d'une desdites au moins deux faces opposées est formée par une succession de portions rectangulaires solidaires entre elles afin de former un spiral polygonal.According to a second embodiment, 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.

Avantageusement selon les deux modes de réalisation de l'invention, le spiral polygonal ainsi obtenu permet de diminuer géométriquement le risque de collement entre spires, voire de limiter strictement la surface de contact entre spires à la surface de jonction entre deux portions prismatiques de la lame ou entre deux portions rectangulaires de la face d'une spire.Advantageously according to the two embodiments of the invention, 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.

Conformément à d'autres variantes avantageuses de l'invention :

  • selon le premier mode de réalisation, au moins deux portions prismatiques adjacentes formant un angle obtus entre elles ;
  • selon le premier mode de réalisation, les longueurs des portions prismatiques formant ledit spiral ne sont pas constantes ;
  • selon le premier mode de réalisation, les longueurs des portions prismatiques diminuent, de manière continue, de la première portion prismatique de la spire interne jusqu'à la dernière portion prismatique de la spire externe dudit spiral ;
  • selon le deuxième mode de réalisation, les longueurs des portions rectangulaires formant ladite une desdites au moins deux faces opposées, ne sont pas constantes ;
  • selon le deuxième mode de réalisation, l'autre desdites au moins deux faces opposées est formée par une surface unique en forme de spirale ;
  • au moins une partie de l'autre desdites au moins deux faces opposées est formée par une succession de portions rectangulaires solidaires entre elles ;
  • selon le deuxième mode de réalisation, les longueurs des portions rectangulaires formant l'autre desdites au moins deux faces opposées, ne sont pas constantes ;
  • selon le deuxième mode de réalisation, les longueurs des portions rectangulaires de l'une ou l'autre desdites au moins deux faces opposées augmentent, de manière continue, de la première portion rectangulaire de la spire interne jusqu'à la dernière portion rectangulaire de la spire externe dudit spiral ;
  • selon les deux modes de réalisation, l'épaisseur de la lame est localement épaissie afin d'y augmenter sa rigidité ;
  • selon les deux modes de réalisation, la spire interne est solidaire d'une virole agencée pour être fixée à un axe ;
  • selon les deux modes de réalisation, le spiral est monobloc ;
  • selon les deux modes de réalisation, le spiral est formé à base d'un matériau comportant du silicium.
According to other advantageous variants of the invention:
  • according to the first embodiment, at least two adjacent prismatic portions forming an obtuse angle between them;
  • according to the first embodiment, the lengths of the prismatic portions forming said spiral are not constant;
  • according to the first embodiment, the lengths of the prismatic portions decrease, continuously, from the first prismatic portion of the inner turn to the last prismatic portion of the outer turn of said hairspring;
  • according to the second embodiment, the lengths of the rectangular portions forming said one of said at least two opposite faces, are not constant;
  • according to the second embodiment, the other of said at least two opposite faces is formed by a single spiral-shaped surface;
  • at least a portion of the other of said at least two opposite faces is formed by a succession of rectangular portions integral with each other;
  • according to the second embodiment, the lengths of the rectangular portions forming the other of said at least two opposite faces, are not constant;
  • according to the second embodiment, the lengths of the rectangular portions of one or the other of said at least two opposite faces increase, in a continuous manner, from the first rectangular portion of the inner turn to the last rectangular portion of the outer turn of said hairspring;
  • according to both embodiments, the thickness of the blade is locally thickened to increase its rigidity;
  • according to the two embodiments, the inner coil is integral with a ferrule arranged to be fixed to an axis;
  • according to the two embodiments, the hairspring is in one piece;
  • according to the two embodiments, the hairspring is formed based on a material comprising silicon.

Enfin, l'invention se rapporte également à une pièce d'horlogerie caractérisée en ce qu'elle comporte au moins un spiral selon l'une des variantes précédentes.Finally, the invention also relates to a timepiece characterized in that it comprises at least one hairspring according to one of the preceding variants.

Description sommaire des dessinsBrief description of the drawings

D'autres particularités et avantages ressortiront clairement de la description qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence aux dessins annexés, dans lesquels :

  • la figure 1 est une vue schématique de deux portions prismatiques adjacentes selon un premier mode de réalisation de l'invention ;
  • les figures 2 et 3 sont des vues de dessus partielles de deux exemples de spiral selon un premier mode de réalisation de l'invention ;
  • la figure 4 est une vue en perspective partielle d'une virole et du début de spire interne d'un spiral selon l'invention ;
  • les figures 5 et 6 sont des vues de dessus d'alternatives d'un spiral selon un premier mode de réalisation de l'invention ;
  • les figures 7 à 10 sont des vues de dessus d'alternatives ou variantes d'un spiral selon un deuxième mode de réalisation de l'invention.
Other particularities and advantages will emerge clearly from the description which is given hereinafter, by way of indication and in no way limiting, with reference to the appended drawings, in which:
  • the figure 1 is a schematic view of two adjacent prismatic portions according to a first embodiment of the invention;
  • the Figures 2 and 3 are partial top views of two examples of a hairspring according to a first embodiment of the invention;
  • the figure 4 is a partial perspective view of a ferrule and the beginning of inner coil of a spiral according to the invention;
  • the Figures 5 and 6 are top views of alternatives of a hairspring according to a first embodiment of the invention;
  • the Figures 7 to 10 are top views of alternatives or variants of a hairspring according to a second embodiment of the invention.

Description détaillée des modes de réalisation préférésDetailed Description of the Preferred Embodiments

La présente invention se rapporte à un spiral destiné au domaine de l'horlogerie. Plus précisément, le spiral est destiné à être monté dans une pièce d'horlogerie comme, par exemple, en coopération avec un balancier pour former un résonateur balancier - spiral formant l'organe réglant de la pièce d'horlogerie.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.

Comme expliqué ci-dessus, il a été remarqué que des collements de spires pouvaient être engendrés avec l'utilisation de spiraux en silicium cristallin. En effet, les hauteurs des spires se faisant faces sont tellement lisses qu'une adhérence peut être engendrée par simple rapprochement de deux spires lors, par exemple, d'un choc subi par la pièce d'horlogerie. Cette adhérence peut encore être augmentée par la contamination du spiral par des impuretés ou du lubrifiant lors de la fabrication ou au porté.As explained above, it has been noticed that 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.

Le spiral 1, 11, 21, 31, 41, 51, 61, 71 selon l'invention comporte une lame 3, 13, 23, 33, 43, 53, 63, 73 pleine, c'est-à-dire ne comportant pas d'évidement ou d'ajourage, comprenant une longueur L, une hauteur H et une épaisseur E. La lame 3, 13, 23, 33, 43, 53, 63, 73 est enroulée sur elle-même selon plusieurs spires S1, S2, S'1, S'2, S3, Sext, Sint.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 .

Avantageusement selon un premier mode de réalisation de l'invention, au moins une partie de la lame 3, 23, 43, 63 est formée par une succession de portions P1, P2, Px, P'x, Py, P'y, Pz prismatiques solidaires entre elles afin d'obtenir un spiral 1, 21, 41, 61 polygonal.Advantageously according to a first embodiment of the invention, 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.

Le spiral 1, 21, 41, 61 polygonal ainsi obtenu permet de diminuer géométriquement le risque de collement entre spires S1, S2, S'1, S'2, S3, Sext, Sint, voire de limiter strictement la surface de contact entre spires S1, S2, S'1, S'2, S3, Sext, Sint à la surface de jonction entre deux portions P1, P2, Px, P'x, Py, P'y, Pz prismatiques. En effet, chaque jonction forme un angle α entre chaque portion P comme, dans l'exemple de la figure 1, l'angle αz1 entre la portion Pz et la portion Pz+1. On comprend donc que la spire S3 possède, au niveau de chaque jonction, une surface de contact 5 sensiblement verticale et parallèle à la hauteur H qui fait face à la spire immédiatement consécutive.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. Indeed, each junction forms an angle α between each portion P, as in the example of figure 1 the angle α z1 between the portion P z and the portion P z + 1 . It is therefore understood that 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.

Comme expliqué ci-dessus, la lame 3, 23, 43, 63 devant être enroulée sur elle-même, au moins deux portions prismatiques P1, P2, Px, P'x, Py, P'y, Pz adjacentes forment, préférentiellement selon l'invention, un angle α obtus, c'est-à-dire un angle α inférieur à 180° mais supérieur à 90°. En effet, toutes les portions P1, P2, Px, P'x, Py, P'y, Pz n'ont pas à être strictement non alignées et certaines portions P1, P2, Px, P'x, Py, P'y, Pz consécutives peuvent avoir l'utilité d'être solidaires selon un angle α, par exemple, égal à 180°.As explained above, 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 α , that is to say an angle α less than 180 ° but greater than 90 °. Indeed, all the portions P 1 , P 2 , P x , P ' x , P y , P' y , P z do not have to be strictly non-aligned and certain portions P 1 , P 2 , P x , P Consecutive x ', P y , P' y , P z may have the utility of being integral at an angle α, for example equal to 180 °.

Il est bien-sûr également possible que chaque portion P1, P2, Px, P'x, Py, P'y, Pz prismatique soit solidarisée à au moins une autre portion prismatique adjacente selon un angle obtus. Un tel exemple est illustré aux figures 2 et 5.It is of course also possible for each prismatic portion P 1 , P 2 , P x , P ' x , P y , P' y , P z to be secured to at least one other prismatic portion adjacent at an obtuse angle. Such an example is illustrated in figures 2 and 5 .

A la figure 2, on peut voir partiellement un spiral 21 formé par une lame 23 unique dont deux spires successives S1, S2 sont formées respectivement par les portions Px, PX+1, Px+2, Px+3 et les portions Py, Py+1, Py+2, Py+3, Py+4. La spire S1 en trait plein est référencée S1' en trait discontinu pour illustrer son déplacement lors d'un choc. On remarque alors immédiatement que, contrairement à un spiral classique, seules les jonctions entre les portions Px, Px+1, Px+2, Px+3 entreront, lors d'un choc, en contact avec respectivement les portions Py, Py+1, Py+2, Py+3, Py+4, etc. de la spire S2 immédiatement consécutive.To the figure 2 it is possible to partially see a spiral 21 formed by a single blade 23, of which two successive turns S 1 , S 2 are formed respectively by the portions P x , P X + 1 , P x + 2 , P x + 3 and the portions P y , P y + 1 , P y + 2 , P y + 3 , P y + 4 . The turn S 1 in full line is referenced S 1 ' in broken lines to illustrate its displacement during an impact. We then note immediately that, unlike a conventional spiral, only the junctions between the portions P x , P x + 1 , P x + 2 , P x + 3 will, during an impact, come into contact with the portions P respectively. y , P y + 1 , P y + 2 , P y + 3 , P y + 4 , and so on. of the turn S 2 immediately consecutive.

Afin d'augmenter les chances que les jonctions entre les portions P1, P2, Px, P'x, Py, P'y, Pz seules touchent la spire immédiatement consécutive, les longueurs des portions P1, P2, Px, P'x, Py, P'y, Pz prismatiques formant la spire interne dudit spiral peuvent être plus grandes que les longueurs des portions P1, P2, Px, P'x, Py, P'y, Pz prismatiques formant la spire externe dudit spiral.In order to increase the chances that the junctions between the portions P 1 , P 2 , P x , P ' x , P y , P' y , P z alone touch the turn immediately consecutive, 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.

Toutefois, dans le but de totalement éviter le contact hors des jonctions, les longueurs des portions P1, P2, Px, P'x, Py, P'y, Pz prismatiques diminuent, de manière continue, de la première portion prismatique de la spire interne jusqu'à la dernière portion prismatique de la spire externe dudit spiral quel que soit l'état d'armage du spiral. Un tel exemple est illustré aux figures 3 et 6.However, in order to completely avoid the contact out of the junctions, 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 .

A la figure 3, on peut voir partiellement un spiral 41 formé par une lame 43 unique dont deux spires successives S'1, S'2 sont formées respectivement par les portions P'x, P'x+1, P'x+2, P'x+3 et les portions P'y, P'y+1, P'y+2, P'y+3, P'y+4. La spire S'1 en trait plein est référencée S'1' en trait discontinu pour illustrer son déplacement lors d'un choc. On remarque alors immédiatement que, géométriquement, seules les jonctions de la spire S'1 entre les portions P'x, P'x+1, P'x+2, P'x+3 sont capables d'entrer, lors d'un choc, en contact avec respectivement les portions P'y, P'y+1, P'y+2, P'y+3, P'y+4, etc. de la spire S'2 immédiatement consécutive.To the figure 3 it is possible to partially see a spiral 41 formed by a single blade 43 of which two successive turns S ' 1 , S' 2 are formed respectively by the portions P ' x , P' x + 1 , P ' x + 2 , P' x +3 and the portions P ' y , P' y + 1 , P ' y + 2 , P' y + 3 , P ' y + 4 . The turn S ' 1 in full line is referenced S' 1 ' in broken lines to illustrate its displacement during a shock. We then note immediately that, geometrically, only the junctions of the turn S ' 1 between the portions P' x , P ' x + 1 , P' x + 2 , P ' x + 3 are capable of entering, when a shock, in contact with the portions P ' y , P' y + 1 , P ' y + 2 , P' y + 3 , P ' y + 4 , and so on. of the turn S ' 2 immediately consecutive.

Dans les exemples des figures 1 à 5, les faces Fint, Fext opposées de chaque portion prismatique d'une spire étant en vis-à-vis avec au moins une autre spire, sont préférentiellement symétriques, c'est-à-dire parallèles. Toutefois, les faces Fint, Fext opposées de chaque portion prismatique d'une spire pourraient également être asymétriques afin que la section formée par la hauteur H sur l'épaisseur E soit continûment variable, c'est-à-dire augmente et/ou diminue, en permanence sur chaque portion prismatique. Ainsi, l'asymétrie entre les deux faces Fint, Fext opposées de chaque portion prismatique induirait une variation continue de l'épaisseur E sur la longueur L de chaque portion prismatique. On comprend alors que les deux bases polygonales des portions prismatiques pourraient être, à titre d'exemple, hexagonales ou trapézoïdales.In the examples of Figures 1 to 5 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. However, 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. Thus, 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. It will be understood that the two polygonal bases of the prismatic portions could be, for example, hexagonal or trapezoidal.

Avantageusement selon un deuxième mode de réalisation de l'invention, les deux faces Fint, Fext opposées de chaque spire étant en vis-à-vis avec au moins une autre spire, sont asymétriques comme illustré dans les exemples des figures 7 à 10 représentant des vues de dessus. On comprend donc que la section formée par la hauteur H sur l'épaisseur E est continûment variable, c'est-à-dire augmente ou diminue en permanence sur la longueur de la lame du spiral. En effet, l'asymétrie entre les deux faces Fint, Fext opposées induit une variation continue de l'épaisseur E sur la longueur de la lame du spiral.Advantageously according to a second embodiment of the invention, 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.

Préférentiellement, au moins une partie d'une desdites au moins deux faces Fint, Fext opposées est formée par une succession de portions rectangulaires solidaires entre elles afin de former un spiral 11, 31, 51, 71 polygonal.Preferably, 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.

Le spiral 11, 31, 51, 71 polygonal ainsi obtenu permet de diminuer géométriquement le risque de collement entre les spires comprises entre la spire interne Sint et la spire externe Sext, voire de limiter strictement la surface de contact entre spires à la surface de jonction (symbolisé par un point aux figures 7 à 10) entre deux portions rectangulaires. En effet, comme pour le premier mode de réalisation, chaque jonction forme un angle α entre chaque portion rectangulaire. On comprend donc que la spire interne Sint possède, au niveau de chaque jonction, une surface de contact sensiblement verticale et parallèle à la hauteur H qui fait face à la spire immédiatement consécutive.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 α 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.

Comme expliqué ci-dessus, la lame 13, 33, 53, 73 devant être enroulée sur elle-même, au moins deux portions rectangulaires adjacentes forment, préférentiellement selon l'invention, un angle α obtus, c'est-à-dire un angle α inférieur à 180° mais supérieur à 90°. En effet, toutes les portions n'ont pas à être strictement non alignées et certaines portions consécutives peuvent avoir l'utilité d'être solidaires selon un angle α, par exemple, égal à 180°.As explained above, 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 α , that is to say a angle α less than 180 ° but greater than 90 °. Indeed, 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 α, for example, equal to 180 °.

Il est bien-sûr également possible que chaque portion rectangulaire soit solidarisée à au moins une autre portion rectangulaire adjacente selon un angle obtus comme illustré dans les exemples des figures 7 à 10.It is of course also possible for each rectangular portion to be secured to at least one other rectangular portion adjacent at an obtuse angle as illustrated in the examples of FIGS. Figures 7 to 10 .

De plus, les longueurs des portions rectangulaires formant ladite une desdites au moins deux faces opposées peuvent ne pas être constante. Ainsi, suivant une première alternative illustrée aux figures 7 et 9, en partant de la spire interne Sint, la face externe Fext de chaque spire est formée par une succession de portions rectangulaires solidaires entre elles (chaque jonction étant symbolisée par un point), la longueur de chaque portion rectangulaire étant constante.In addition, the lengths of the rectangular portions forming said one of said at least two opposite faces may not be constant. Thus, following a first alternative illustrated figures 7 and 9 , starting from the internal turn S int , 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.

A l'inverse, suivant une deuxième alternative illustrée aux figures 8 et 10, en partant de la spire interne Sint, la face externe Fext de chaque spire est formée par une succession de portions rectangulaires solidaires entre elles, la longueur de chaque portion rectangulaire n'étant pas constante.Conversely, following a second alternative illustrated in figures 8 and 10 , starting from the internal turn S int , the outer face F ext of each turn is formed by a succession of rectangular portions integral with each other, the length of each rectangular portion being not constant.

Préférentiellement, les longueurs des portions rectangulaires augmentent, de manière continue, de la première portion rectangulaire de la face externe Fext de la spire interne Sint jusqu'à la dernière portion rectangulaire de la face externe Fext de la spire externe Sext du spiral 31, 71.Preferably, 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.

Comme visible aux figures 7 à 10, chaque face Fint, Fext opposées de chaque spire étant asymétriques, c'est-à-dire non parallèles, l'autre face est libre quant à sa géométrie contrairement au premier mode de réalisation dans lequel les faces Fint, Fext opposées de chaque portion prismatique sont préférentiellement symétriques, c'est-à-dire parallèles. Ainsi, selon une première variante, l'autre desdites au moins deux faces Fint, Fext opposées est formée par une surface unique en forme de spirale comme un spiral habituel.As visible to Figures 7 to 10 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. Thus, according to a first variant, 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.

Dans l'exemple visible à la figure 7, le spiral 11 comporte une face interne Fint formée par une surface unique en forme de spirale alors que sa face externe Fext est formée par une succession de portions rectangulaires solidaires entre elles (chaque jonction étant symbolisée par un point), la longueur de chaque portion rectangulaire étant constante. On comprend donc que géométriquement l'épaisseur E de la lame 13 n'est pas constante.In the example visible at figure 7 , 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.

Dans l'exemple visible à la figure 8, le spiral 21 comporte une face interne Fint formée par une surface unique en forme de spirale alors que sa face externe Fext est formée par une succession de portions rectangulaires solidaires entre elles, la longueur de chaque portion rectangulaire n'étant pas constante. Plus précisément, les longueurs des portions rectangulaires augmentent, de manière continue, de la première portion rectangulaire de la face externe Fext de la spire interne Sint jusqu'à la dernière portion rectangulaire de la face externe Fext de la spire externe Sext du spiral 31. On comprend donc que géométriquement l'épaisseur E de la lame 33 n'est pas non plus constante.In the example visible at figure 8 , 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.

Selon une deuxième variante, l'autre desdites au moins deux faces Fint, Fext opposées peut également être formée par une succession de portions rectangulaires solidaires entre elles comme pour la première face.According to a second variant, 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.

Dans l'exemple visible à la figure 9, chaque face interne Fint et externe Fext du spiral 51 est formée par une succession de portions rectangulaires solidaires entre elles (chaque jonction étant symbolisée par un point), la longueur de chaque portion rectangulaire étant constante. On remarque que la longueur constante choisie pour chaque face Fint, Fext n'est pas identique. En effet, la longueur constante de chaque portion rectangulaire de la face interne Fint est plus petite que la longueur constante de chaque portion rectangulaire de la face externe Fext. On comprend, ici aussi, que géométriquement l'épaisseur E de la lame 53 n'est pas constante.In the example visible at figure 9 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. Note that the constant length chosen for each face F int , F ext is not identical. Indeed, 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 . Here again, it is understood that geometrically the thickness E of the blade 53 is not constant.

Dans l'exemple visible à la figure 10, chaque face interne Fint et externe Fext du spiral 71 est formée par une succession de portions rectangulaires solidaires entre elles (chaque jonction étant symbolisée par un point), la longueur de chaque portion rectangulaire n'étant pas constante. Plus précisément, pour chaque face Fint, Fext, les longueurs des portions rectangulaires augmentent, de manière continue, de la première portion rectangulaire de la spire interne Sint jusqu'à la dernière portion rectangulaire de la spire externe Sext du spiral 71. On remarque que la longueur minimale choisie pour chaque face Fint, Fext n'est pas identique. En effet, la longueur minimale de la première portion rectangulaire de la face interne Fint est plus petite que la longueur minimale de la première portion rectangulaire de la face externe Fext. On comprend, ici aussi, que géométriquement l'épaisseur E de la lame 73 n'est pas constante.In the example visible at figure 10 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 . Here again, it is understood that geometrically the thickness E of the blade 73 is not constant.

Bien entendu, la présente invention ne se limite pas à l'exemple illustré mais est susceptible de diverses variantes et modifications qui apparaîtront à l'homme de l'art. En particulier, les modes de réalisation, variantes ou alternatives sont combinables. Ainsi, à titre d'exemple, une partie de la longueur du spiral pourrait être formée à l'aide d'un des modes de réalisation et, une autre partie de la longueur du spiral, par un autre mode de réalisation.Of course, 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. In particular, the embodiments, variants or alternatives are combinable. Thus, for example, 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.

De plus, le spiral 1, 11, 21, 31, 41, 51, 61, 71 polygonal peut également comporter une spire interne Sint qui est solidaire d'une virole agencée pour être fixée à un axe. Un tel exemple est illustré à la figure 4. A cette figure 4, on peut voir partiellement un spiral 61 formé par une lame 63 unique dont la spire interne Sint est formée par les portions P1, P2, etc. reliée entre elles par un angle α 12, la première portion P1 étant solidaire d'une virole 65. La virole 65 sensiblement en forme de trèfle comporte un trou 64 destiné, par exemple, à recevoir un axe de balancier.In addition, 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. Such an example is illustrated in figure 4 . At this figure 4 it is possible to partially see a spiral 61 formed by a single blade 63 whose inner turn S int is formed by the portions P 1 , P 2 , etc. interconnected by an angle α 1 2 , the first portion P 1 being integral with a ferrule 65. The ferrule 65 substantially shaped clover has a hole 64 for, for example, to receive a balance shaft.

Il est également envisageable, quel que soit le mode de réalisation, que l'épaisseur E de la lame 3, 13, 23, 33, 43, 53, 63, 73 du spiral 1, 11,21, 31, 41, 51, 61, 71 soit localement modifiée, comme par exemple épaissie, afin de modifier, comme par exemple augmenter, localement la rigidité de la lame 3, 13, 23, 33, 43, 53, 63, 73.It is also conceivable, whatever the embodiment, that 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.

A la lecture des exemples ci-dessus, on comprend que le spiral 1, 11, 21, 31, 41, 51, 61, 71 peut être monobloc, c'est-à-dire que la lame 3, 13, 23, 33, 43, 53, 63, 73 est formée sans discontinuité de matière. Un tel spiral peut être est formé à base d'un matériau comportant du silicium, c'est-à-dire, par exemple, du silicium monocristallin, du silicium polycristallin, du silicium monocristallin dopé, du silicium polycristallin dopé, du carbure de silicium dopé ou non, du nitrure de silicium dopé ou non, de l'oxyde de silicium dopé ou non tel que le quartz ou de la silice. En effet, le gravage anisotrope de tels matériaux peut être réalisé par voie humide ou par voie sèche.On reading the above examples, it will be understood that 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. Such 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.

Claims (15)

Spiral (1, 21, 41, 61) pour un résonateur horloger comportant une lame (3, 23, 43, 63) pleine enroulée sur elle-même selon plusieurs spires (S1, S2, S'1, S'2, S3, Sint, Sext) caractérisé en ce qu'au moins une partie de la lame (3, 13, 23, 33, 43, 53, 63, 73) est formée par une succession de portions (P1, P2, Px, P'x, Py, P'y, Pz) prismatiques solidaires entre elles afin de former un spiral (1, 21, 41, 61) polygonal.Spiral (1, 21, 41, 61) for a clock resonator comprising a blade (3, 23, 43, 63) fully wound on itself in several turns (S 1 , S 2 , S ' 1 , S' 2 , S 3 , S int , S ext ) characterized in that at least a portion of the blade (3, 13, 23, 33, 43, 53, 63, 73) is formed by a succession of portions (P 1 , P 2 , P x , P ' x , P y , P' y , P z ) integral with each other to form a polygonal spring (1, 21, 41, 61). Spiral (1, 21, 41, 61) selon la revendication précédente, caractérisé en ce qu'au moins deux portions (P1, P2, Px, P'x, Py, P'y, Pz) prismatiques adjacentes forment un angle (α, αz1, α12) obtus entre elles.Spiral (1, 21, 41, 61) according to the preceding claim, characterized in that at least two adjacent prismatic portions (P 1 , P 2 , P x , P ' x , P y , P' y , P z ) are adjacent form an angle ( α , α z1 , α 12 ) obtuse between them. Spiral (1, 21, 41, 61) selon l'une des revendications précédentes, caractérisé en ce que les longueurs des portions (P1, P2) prismatiques formant ledit spiral ne sont pas constantes.Spiral (1, 21, 41, 61) according to one of the preceding claims, characterized in that the lengths of the portions (P 1 , P 2 ) prismatic forming said spiral are not constant. Spiral (1, 21, 41, 61) selon la revendication précédente, caractérisé en ce que les longueurs des portions (P1, P2, Px, P'x, Py, P'y, Pz) prismatiques diminuent, de manière continue, de la première portion (P1) prismatique de la spire interne (Sint) jusqu'à la dernière portion (Px, P'x, Py, P'y, Pz) prismatique de la spire externe dudit spiral.Spiral (1, 21, 41, 61) according to the preceding claim, characterized in that the lengths of the prismatic portions (P 1 , P 2 , P x , P ' x , P y , P' y , P z ) decrease, continuously, from the first prismatic portion (P 1 ) of the inner turn (S int ) to the last portion (P x , P ' x , P y , P' y , P z ) prismatic of the outer turn said spiral. Spiral (11, 31, 51, 71) pour un résonateur horloger comportant une lame (13, 33, 53, 73) pleine enroulée sur elle-même selon plusieurs spires (Sint, Sext) caractérisé en ce que les deux faces (Fint, Fext) opposées de chaque spire étant en vis-à-vis avec au moins une autre spire, sont asymétriques et en ce qu'au moins une partie de l'une desdites au moins deux faces (Fint, Fext) opposées est formée par une succession de portions rectangulaires solidaires entre elles afin de former un spiral (11, 31, 51, 71) polygonal.Spiral (11, 31, 51, 71) for a clock resonator comprising a blade (13, 33, 53, 73) fully wound on itself in several turns (S int , S ext ), characterized in that the two faces ( F int , F ext ) opposite each turn being vis-à-vis with at least one other turn, are asymmetrical and in that at least a portion of one of said at least two faces (F int , F ext ) is formed by a succession of rectangular portions integral with each other to form a polygonal spring (11, 31, 51, 71). Spiral (11, 31, 51, 71) selon la revendication précédente, caractérisé en ce que les longueurs des portions rectangulaires formant ladite une desdites au moins deux faces opposées, ne sont pas constantes.Spiral (11, 31, 51, 71) according to the preceding claim, characterized in that the lengths of the rectangular portions forming said one of said at least two opposite faces, are not constant. Spiral (11, 31, 51, 71) selon la revendication 5 ou 6, caractérisé en ce que l'autre desdites au moins deux faces (Fext, Fint) opposées est formée par une surface unique en forme de spirale.Spiral (11, 31, 51, 71) according to claim 5 or 6, characterized in that the other of said at least two opposing faces (F ext , F int ) is formed by a single spiral-shaped surface. Spiral (11, 31, 51, 71) selon la revendication 5 ou 6, caractérisé en ce qu'au moins une partie de l'autre desdites au moins deux faces (Fext, Fint) opposées est formée par une succession de portions rectangulaires solidaires entre elles.Spiral (11, 31, 51, 71) according to claim 5 or 6, characterized in that at least a portion of the other of said at least two opposing faces (F ext , F int ) is formed by a succession of portions rectangular solidarity. Spiral (11, 31, 51, 71) selon la revendication précédente, caractérisé en ce que les longueurs des portions rectangulaires formant l'autre desdites au moins deux faces opposées, ne sont pas constantes.Spiral (11, 31, 51, 71) according to the preceding claim, characterized in that the lengths of the rectangular portions forming the other of said at least two opposite faces, are not constant. Spiral (11, 31, 51, 71) selon l'une des revendications 5 à 9, caractérisé en ce que les longueurs des portions rectangulaires augmentent, de manière continue, de la première portion rectangulaire de la spire interne (Sint) jusqu'à la dernière portion rectangulaire de la spire externe (Sext) dudit spiral.Spiral (11, 31, 51, 71) according to one of claims 5 to 9, characterized in that the lengths of the rectangular portions increase, continuously, the first rectangular portion of the inner coil (S int ) up to at the last rectangular portion of the outer turn (S ext ) of said hairspring. Spiral (1, 11, 21, 31, 41, 51, 61, 71) selon l'une des revendications précédentes, caractérisé en ce que l'épaisseur de la lame (13, 33, 53, 73) est localement épaissie afin d'y augmenter sa rigidité.Spiral (1, 11, 21, 31, 41, 51, 61, 71) according to one of the preceding claims, characterized in that the thickness of the blade (13, 33, 53, 73) is locally thickened in order to to increase its rigidity. Spiral (1, 11, 21, 31, 41, 51, 61, 71) selon l'une des revendications précédentes, caractérisé en ce que la spire interne (Sint) est solidaire d'une virole (65) agencée pour être fixée à un axe.Spiral (1, 11, 21, 31, 41, 51, 61, 71) according to one of the preceding claims, characterized in that the inner coil (S int ) is integral with a ferrule (65) arranged to be fixed to an axis. Spiral (1, 11, 21, 31, 41, 51, 61, 71) selon l'une des revendications précédentes, caractérisé en ce que le spiral (1, 11, 21, 31, 41, 51, 61, 71) est monobloc.Spiral (1, 11, 21, 31, 41, 51, 61, 71) according to one of the preceding claims, characterized in that the spiral (1, 11, 21, 31, 41, 51, 61, 71) is piece. Spiral (1, 11, 21, 31, 41, 51, 61, 71) selon l'une des revendications précédentes, caractérisé en ce que le spiral (1, 11, 21, 31, 41, 51, 61, 71) est formé à base d'un matériau comportant du silicium.Spiral (1, 11, 21, 31, 41, 51, 61, 71) according to one of the preceding claims, characterized in that the spiral (1, 11, 21, 31, 41, 51, 61, 71) is formed of a material having silicon. Pièce d'horlogerie caractérisée en ce qu'elle comporte au moins un spiral (1, 11, 21, 31, 41, 51, 61, 71) selon l'une des revendications précédentes.Timepiece characterized in that it comprises at least one hairspring (1, 11, 21, 31, 41, 51, 61, 71) according to one of the preceding claims.
EP14193409.1A 2013-12-16 2014-11-17 Polygonal hairspring for a timepiece resonator Active EP2887152B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14193409.1A EP2887152B1 (en) 2013-12-16 2014-11-17 Polygonal hairspring for a timepiece resonator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13197318.2A EP2884346A1 (en) 2013-12-16 2013-12-16 Polygonal hairspring for a timepiece resonator
EP14193409.1A EP2887152B1 (en) 2013-12-16 2014-11-17 Polygonal hairspring for a timepiece resonator

Publications (3)

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EP2887152A2 true EP2887152A2 (en) 2015-06-24
EP2887152A3 EP2887152A3 (en) 2016-06-08
EP2887152B1 EP2887152B1 (en) 2023-01-04

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EP14193409.1A Active EP2887152B1 (en) 2013-12-16 2014-11-17 Polygonal hairspring for a timepiece resonator

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US (1) US9268307B2 (en)
EP (2) EP2884346A1 (en)
JP (1) JP5978282B2 (en)
CN (2) CN204389879U (en)
HK (1) HK1211710A1 (en)

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EP2884346A1 (en) * 2013-12-16 2015-06-17 ETA SA Manufacture Horlogère Suisse Polygonal hairspring for a timepiece resonator
EP3159748B1 (en) * 2015-10-22 2018-12-12 ETA SA Manufacture Horlogère Suisse Compact hairspring with variable cross-section
EP3181940B2 (en) * 2015-12-18 2023-07-05 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Method for manufacturing a hairspring with a predetermined stiffness by localised removal of material

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Also Published As

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

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