• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a resonator of the inertia-elasticity type comprising a hairspring (21) coupled to a flywheel and a frequency adjusting system of the resonator comprising a racket (31) arranged to cooperate with a coil (26). ) of the hairspring (21) to selectively select the active length of the hairspring (21). According to the invention, the portion of the coil (26) of the hairspring (21) cooperating with the racking (31) comprises at least one zone (24) of larger section than the other turns of the hairspring in order to adjust more finely the frequency of the resonator.
    公开号:CH711161A2
    申请号:CH00796/15
    申请日:2015-06-03
    公开日:2016-12-15
    发明作者:Helfer Jean-Luc；Stranczl Marc；Laurent Jeanneret；Berdat Xavier
    申请人:Eta Sa Mft Horlogere Suisse；
    IPC主号:
    专利说明:

    Field of the invention
    The invention relates to a finely tuned resonator by raquetry and more particularly to a resonator whose frequency can be adjusted with a smaller variation for the same movement of the raquetetterie.
    Background of the invention
    The adjustment of the frequency of a balance-spring resonator can be made by modifying the inertia of the balance or the elastic torque of the spiral.
    It is known to use a racket to change the elastic torque of the spiral. A racking generally comprises two stops intended to form the counting point, that is to say, to define the length of the spiral blade, called the active length, which will work in contraction and expansion to provide the elastic torque of the resonator.
    However, the adjustment by a raquetry is very sensitive, that is to say that a small displacement of the stops generates a large frequency variation, and requires the development of micrometric screw systems to make more accurate the setting.
    Summary of the invention
    The object of the present invention is to overcome all or part of the disadvantages mentioned above by providing a resonator with a frequency adjustment system for a finer adjustment of the frequency with a raquetterie facilitating the work final adjustment to manufacture and adjustment in after-sales.
    For this purpose, the invention relates to a resonator of the inertia-elasticity type comprising a hairspring coupled to a flywheel and a frequency control system of the resonator comprising a racket arranged to cooperate with a turn of the spiral to selectively choose the active length of the hairspring characterized in that the portion of the coil winding cooperating with the racking comprises at least one section area larger than the other turns of the hairspring in order to more finely adjust the frequency of the resonator.
    Advantageously according to the invention, it is therefore understood that a thickening of material on the spiral coil which cooperates with the racking is sufficient to make the setting of the resonator step more fine. Indeed, it has been found that an area of larger section provides a suitable stiffening, in cooperation with a raquetterie, to reduce the influence of this area on the elastic torque of the spiral with respect to the influence on the rest of the not thickened spiral. It is therefore understood that the displacement of the racking along the thickened section will have a lesser impact on the frequency of the resonator than on the non-thickened section of the remainder of the hairspring, which advantageously makes it possible to obtain the same variation of step with a larger displacement of the raqueterie.
    According to other advantageous variants of the invention:the portion of the coil winding cooperating with the racking comprises at least two zones of different sections and larger than the other spiral windings in order to adjust more finely, in at least two different ratios, the frequency of the resonator;the racking comprises two stops selectively positioned on either side of the thickness of the hairspring and movable in the same direction as the portion of the coil spiral cooperating with the racket;alternatively, the two stops are movable to rotate relative to an axis;the axis of rotation of the stops is centered on the center of the circle inscribed at the opening of a shell of the spiral;according to another alternative, the two stops are movable in translation relative to a straight line;the line of translation of the abutments passes through the center of the circle inscribed at the opening of a shell of the spiral;the two stops are formed by a racking key or two snap pins;the rack and the part of the spiral winding cooperating with the racket are arranged to provide a one-second adjustment per day to the resonator for a displacement of the raquetry between 10 and 50 micrometers along the part of the spiral turn cooperating with the raqueterie.
    In addition, the invention relates to a timepiece comprising a bridge and a platinum characterized in that it further comprises a resonator according to one of the preceding variants, the raquetry being mounted on the bridge and the resonator being pivotally mounted, using a shaft, between the bridge and the plate.
    Brief description of the drawings
    Other features and advantages will become apparent from the description which is given below, for information only and not limiting, with reference to the accompanying drawings, in which:<tb> Fig. 1 <SEP> is a representation of a portion of an example of a spiral according to the invention;<tb> fig. 2 <SEP> is a representation of a portion of an exemplary raetering according to the invention;<tb> fig. 3 <SEP> is a top view of a hairspring according to a first embodiment of the invention;<tb> fig. 4 <SEP> is a top view of a hairspring according to a second embodiment of the invention;<tb> figs. 5 to 7 <SEP> are partial views from above of resonator alternatives according to the invention.
    Detailed Description of the Preferred Embodiments
    The adjustment by a raquetry is very sensitive, that is to say that a small displacement of the stops generates a large frequency variation, and requires the development of micrometer screw systems to make more precise adjustment. By way of information, a variation of one second per day is generally obtained for a displacement of about 2 to 3 micrometers of the stops of the raqueterie along the outer turn which corresponds to a racket rotation of about 0 , 05 °.
    The present invention proposes to restore interest in a setting by snapping by proposing an adjustment of one second a day to the resonator for a larger displacement of the raquetry such as, for example, between 10 and 50 microns along the portion of the coil spiral cooperating with the raquetry.
    It is even understood, advantageously according to the invention, that it can be imagined a universal setting for calibres of the same industrial group or the same watch brand consisting in developing an identical movement of the racket for each caliber allowing the variation of one second per day of the resonator. Indeed, such a universal setting would simplify the final work of adjustment to manufacture and adjustment in after-sales.
    Thus, the invention relates to a resonator of the inertia-elasticity type comprising a hairspring coupled to a flywheel such as, for example, a balance resonator - hairspring. A hairspring 1, as partially visible in FIG. 1, comprises a shell 3 forming an opening 5 for receiving a balance shaft. The shell 3 is shaped with a blade 7 wound on itself in several turns. In the example of FIG. 1, it can be seen that the blade 7 has a thickness E, a height H and a length L.
    In addition, the resonator comprises a frequency adjustment system comprising a racket arranged to cooperate with a coil spiral to selectively choose the active length of the spiral. The turn is preferably the outer turn of the spiral for obvious reasons of accessibility. However, it is also possible to use, as an equivalent alternative, the penultième turn, that is to say the turn preceding the outer turn.
    Advantageously according to the invention, the portion of the spiral winding cooperating with the racking comprises at least one section of area greater than the other spiral turns in order to more finely adjust the frequency of the resonator. Therefore, as explained above, each section area larger than the other spiral turns may have a thickness variation E and / or a height variation H to change its section.
    Indeed, it has been found that a zone of larger section provides a suitable stiffening, in cooperation with a raquetterie, to reduce the influence of this area on the elastic torque of the spiral with respect to the influence on the rest of the unthickened hairspring. It is therefore understood that the displacement of the racking along the thickened section will have a smaller impact on the frequency of the resonator than on the non-thickened section of the remainder of the hairspring, which advantageously makes it possible to obtain the same frequency variation with a larger displacement of the raqueterie.
    [0018] A first embodiment of the invention is illustrated in FIGS. 2 and 3. In fig. 2, there can be seen a resonator 11 of the inertia-elasticity type comprising a hairspring 21 coupled to a flywheel 13 by means of a shaft 15. With the aid of the shaft 15, the resonator 11 is thus pivotally mounted between a bridge 14 and a plate 16 via, for example, bearings 12. Usually, the spiral 21 is thus mounted between the shaft 15 by its ferrule 23 and the bridge 14 by the pin 29 attached to the end of its outer turn 26.
    The rack 31 is also mounted on the bridge 14 and has two stops 33, 35. The rack 31 is arranged to cooperate, preferably with a portion 24 of the outer coil 26 of the spiral 21 which comprises at least one zone of section larger than the other spiral turns to fine-tune the frequency of the resonator 11. However, it is also possible to use, as an equivalent alternative, a thickened portion on the penultième turn, that is to say the spire preceding outer turn 26.
    In the example of FIG. 2, it can be seen that the stops 33, 35 are formed by a key 34 mounted on the racket 32. Alternatively, the key 34 can be replaced by two pins to form the stops 33, 35.
    Preferably, the thickening section is achieved only by an increase in thickness of the zone 24 as shown in FIG. 3. It is thus clear that the hairspring 21 comprises the majority of its blade 27 with a thickness E1comprise between 20 and 50 micrometers and a zone 24 on its outer turn 26 with a thickness E2 greater than the thickness E1. Thus, according to the spacing of the abutments 33, 35 and the adjustment scale by the desired raquet, the extra thickness E2 of the zone 24 is between 50% and 200% relative to that E1 of the remainder of the spiral, that is to say say between 1.5 and 3 times the thickness E1. In the example illustrated in FIG. 3, the thickness E2 is twice as large as that of the remainder of the hairspring 21.
    Advantageously according to the invention, such a hairspring 21 can be obtained for additive or destructive manufacturing methods. Thus, among non-limiting examples of additive or destructive manufacturing, mention may be made of the LIGA processes, the three-dimensional prints, the methods combining a photolithography of a mask and a dry or wet etching according to the patterns of said mask, the methods combining an alloy casting and a wire rolling according to at least two consecutive consecutive sections or laser engraving.
    It is understood that the spiral can be made from many materials. By way of non-limiting examples, the hairspring can thus be manufactured based on silicon, ceramic or metal. When the hairspring is based on silicon, it may comprise, for example, monocrystalline silicon, doped monocrystalline silicon, polycrystalline silicon, doped polycrystalline silicon, porous silicon, silicon oxide, quartz, silica, silicon nitride or silicon carbide.
    In addition, when the spiral is based on ceramic, it may comprise, for example, photostructurable glass, borosilicate, aluminosilicate, quartz glass, zerodur, monocrystalline corundum, polycrystalline corundum, alumina, aluminum oxide, aluminum nitride, monocrystalline ruby, polycrystalline ruby, zirconium oxide, titanium oxide, titanium nitride, titanium carbide , tungsten nitride, tungsten carbide, boron nitride or boron carbide.
    Finally, when the hairspring is based on metal, it may comprise, for example, an iron alloy such as 15P steel, 20AP, 316L or NIVAROX CT, a copper alloy such as brass, an alloy nickel such as nickel silver or NIVAFLEX, titanium or one of its alloys, gold or one of its alloys, silver or one of its alloys, platinum or one of its alloys, ruthenium or one of its alloys; its alloys, rhodium or one of its alloys or palladium or one of its alloys.
    Thus, by way of example, the thickness E2 and the racket 31 are arranged to provide an adjustment of one second per day to the resonator 11 for a movement of the racket 31 between 10 and 50 micrometers, such as for example, 20 microns, along the thickened zone 24 of the outer turn 26 of the hairspring 21.
    It is therefore understood that in addition to the difference in thickness of the zone 24, the two stops 33, 35 of the raquetry 31 are selectively positioned on either side of the thickness E2 of the zone 24 of the spiral 21 and are movable in the same direction A as the length of the zone 24 of the outer turn 26.
    In the example of FIG. 3, the direction A forms a circular arc of center C of the circle inscribed at the opening 25 of the ferrule 23 of the spiral 21. This configuration is obtained because, in the example of FIGS. 2 and 3, the two abutments 33, 35 are movable in rotation with respect to an axis coinciding with that of the shaft 15. In other words, the circle inscribed at the opening 25 of the ferrule 23 of the spiral 21 visible in FIG. . 3 represents the outer section of the shaft 15.
    According to a second embodiment shown in FIG. 4, the portion of the spiral winding 41 cooperating with the raquetry 31 is also the outer turn 46, and comprises at least two zones 42, 44, 48 of different sections and larger than the other spiral windings 41 to adjust more finely, according to at least two distinct ratios, the frequency of the resonator.
    Therefore, in the example of FIG. 4, the three thicknesses E3, E4, E5 and the racket 31 are arranged to provide three one-second adjustments per day to the resonator for a displacement of the rack 31 between 10 and 50 micrometers, such as, for example, respectively 10, 20 and 10 microns, respectively along the zones E5, E4 and E3 thickened of the outer turn 46 of the hairspring 41. In the example illustrated in FIG. 4, the thicknesses E5, E4 and E3 are respectively 50%, 100% and 50% greater than that E1 of the rest of the hairspring 41.
    Thus, advantageously according to the two embodiments of the invention, a timepiece comprising the resonator according to the invention can be developed with the possibility of choosing a finer setting, even universal, which makes it more attractive. use of a snap adjustment for the final adjustment work during manufacturing and after-sales adjustment.
    In addition, according to an alternative not shown, the variation in thickness between the zones E5, E4, E3, E2 and E1 could be more progressive between said zones to provide a continuously variable adjustment to the resonator for a displacement of the raquetry 31 between the thickness zones E5, E4, E3, E2 and E1.
    Of course, the present invention is not limited to the example shown but is susceptible to various variations and modifications that will occur to those skilled in the art. In particular, the arrangement of the zones 24, 42, 44, 48 and the raquetry 31 can be modified for example for questions of ease of implantation.
    According to a first alternative illustrated in FIG. 5, the rotation axis C1 of the racket can no longer be confused with the center C of the circle inscribed at the opening of the shell of the spiral. As shown in fig. 5, the arrangement will be adapted so that the two abutments 331, 351 of the racket are selectively positioned on either side of the thickness of the spiral zone 241 and are movable in the same direction A1que the length of the zone 241de the outer turn 261.
    According to a second alternative illustrated in FIG. 6, the axis C2de rotation of the raquetetterie can even be substantially in the center of the thickened zone 242 of the outer turn 262. As shown in FIG. 6, the arrangement will be adapted so that the two stops 332, 352 of the racking are selectively positioned on either side of the thickness of the zone 242 of the spiral and are movable in the same direction A2 as the length of the zone 242de the outer turn 262.
    According to a third alternative illustrated in FIG. 7, the two abutments 333, 353 of the racket can even be movable in translation relative to a straight line. As shown in fig. 7, the arrangement will be adapted so that the two stops 333, 353 of the racket are selectively positioned on either side of the thickness of the spiral zone 243 and are movable in the same direction A3que the length of the zone 243de the external turn 263. In addition, if the translation line passes through the center C of the circle inscribed at the opening of the spiral shell, the adjustment of the step by the racking does not change the angle formed between the output of the spiral at the ferrule and the counting point. We understand that this would bring a time advantage.
    权利要求:
    Claims (11)
    [1]
    1. Resonator (11) of the inertia-elasticity type comprising a hairspring (21, 41) coupled to a flywheel (13) and a frequency adjusting system of the resonator comprising a racking (31) arranged to cooperate with a turn (26, 261, 262, 263, 46) of the hairspring (21, 41) to selectively select the active length of the hairspring (21, 41) characterized in that the portion of the turn (26, 261, 262, 263 46) of the hairspring (21, 41) cooperating with the racking (31) has at least one area (24, 241, 242, 243, 42, 44, 48) of larger section than the other coils of the hairspring to adjust more finely the frequency of the resonator (11).
    [2]
    2. Resonator (11) according to the preceding claim, characterized in that the portion of the coil (26, 261, 262, 263, 46) of the spiral (21, 41) cooperating with the racking (31) comprises at least two zones (24, 241, 242, 243, 42, 44, 48) of different sections and larger than the other spiral turns to fine tune, in at least two different ratios, the frequency of the resonator (11).
    [3]
    3. Resonator (11) according to claim 1 or 2, characterized in that the racking (31) comprises two stops (33, 331, 332, 333, 35, 351, 352, 353) selectively positioned on either side the thickness (E2, E3, E4, E5) of the hairspring (21, 41) and displaceable in the same direction (A, A1, A2, A3) as the part of the turn (26, 261, 262, 263, 46) of the hairspring (21, 41) cooperating with the racking (31).
    [4]
    4. Resonator (11) according to the preceding claim, characterized in that the two stops (33, 331, 332, 333, 35, 351, 352, 353) are movable to rotate relative to an axis.
    [5]
    5. Resonator (11) according to the preceding claim, characterized in that the axis of rotation of the stops (33, 331, 332, 333, 35, 351, 352, 353) is centered on the center (C) of the inscribed circle. at the opening (25) of a shell (23, 43) of the hairspring (21, 41).
    [6]
    6. Resonator (11) according to claim 3, characterized in that the two stops (33, 331, 332, 333, 35, 351, 352, 353) are movable in translation relative to a straight line.
    [7]
    7. Resonator (11) according to the preceding claim, characterized in that the translational line of the stops (33, 331, 332, 333, 35, 351, 352, 353) passes through the center (C) of the circle inscribed in the opening (25) of a shell (23, 43) of the hairspring (21, 41).
    [8]
    8. Resonator (11) according to one of claims 3 to 7, characterized in that the two stops (33, 331, 332, 333, 35, 351, 352, 353) are formed by a key (34) racking .
    [9]
    9. Resonator (11) according to one of claims 3 to 7, characterized in that the two stops (33, 331, 332, 333, 35, 351, 352, 353) are formed by two pins racking.
    [10]
    10. Resonator (11) according to one of the preceding claims, characterized in that the racket (31) and the part of the coil (26, 261, 262, 263, 46) of the spiral (21, 41) cooperating with the racking (31) are arranged to provide an adjustment of one second per day to the resonator for a displacement of the rack (31) between 10 and 50 micrometers along the portion of the coil (26, 261, 262, 263, 46) of the hairspring (21, 41) cooperating with the racking (31).
    [11]
    11. Timepiece comprising a bridge (14) and a plate (16) characterized in that it further comprises a resonator (11) according to one of the preceding claims, the raquetterie (31) being mounted on the bridge (14) and the resonator (11) being pivotally mounted, by means of a shaft (15), between the bridge (14) and the plate (16).
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    同族专利:
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    CH711161B1|2019-03-15|
    引用文献:
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    EP3839652A1|2019-12-18|2021-06-23|Atokalpa, succursale de Alle de SFF Composants Horlogers S.A.|Hairspring for balance wheel-hairspring oscillator and method for manufacturing same|
    法律状态:
    2018-12-14| PK| Correction|Free format text: RECTIFICATION INVENTEUR |
    优先权:
    申请号 | 申请日 | 专利标题
    CH00796/15A|CH711161B1|2015-06-03|2015-06-03|Resonator with fine adjustment by racking.|CH00796/15A| CH711161B1|2015-06-03|2015-06-03|Resonator with fine adjustment by racking.|
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