• 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 composite balance (100) for a watch oscillating system (200) comprising: - a balance (1) formed from a first material having a first coefficient of thermal expansion and comprising: - a central portion (1.2), - at least two wings each comprising a radial portion (1.3) extending radially from the central portion (1.2) and a free distal portion (1.5), - a balance blade (5) formed in a second material having a second coefficient of thermal expansion different from the first coefficient of thermal expansion, characterized in that the composite balance wheel (100) further comprises: - fixing means (6), such as screws, and in that the balance blade (5) is fixed to each of the free distal portions (1.5) by the fixing means (6), so as to cause pivoting of the free distal portions (1.5) during a temperature variation.
    公开号:CH715951A2
    申请号:CH00566/19
    申请日:2019-04-29
    公开日:2020-09-15
    发明作者:Fraessdorf C/O Novasort Sa Karsten
    申请人:Novasort Sa；
    IPC主号:
    专利说明:

    The present invention relates generally to a balance for an oscillating watch system, an oscillating system for a watch and a watch, in particular arranged to be thermo-compensated.
    Thermo-compensated balances are known in the prior art.
    [0003] Document JP2013178208 describes a thermo-compensated balance.
    On the other hand, this system has the particular drawback of being bulky, of assembly and of complex adjustment, imprecise and sensitive to shocks.
    An object of the present invention is to respond to the drawbacks of the document of the prior art mentioned above and in particular, first of all, to provide a thermo-compensated balance, an oscillating system and a watch allowing, in addition to aesthetic improvement, improve precision, protect against shocks in order to keep a fair and precise measurement of time, to be easier to manufacture, assemble and adjust. The present invention also makes it possible to reduce the size of the watch.
    [0006] For this, a first aspect of the invention relates to a composite balance for an oscillating watch system comprising:<tb> <SEP> - a balance formed from a first material having a first coefficient of thermal expansion andincluding:<tb><SEP> <SEP> • a central portion,<tb><SEP> <SEP> • at least two wings each comprising a radial portion extending radially from the central portion and a free distal portion,<tb> <SEP> - a balance blade formed from a second material having a second coefficient of thermal expansion different from the first coefficient of thermal expansion,characterized in that the composite balance wheel further comprises:<tb><SEP> <SEP> - fixing means, such as screws,<tb><SEP> <SEP>and in that the balance blade is fixed to each of the free distal portions by the fixing means, so as to cause pivoting of the free distal portions during a temperature variation.
    [0007] The term “composite” means the fact that the composite balance wheel comprises two different materials. In addition, the balance blade is fixed so as to provide a recess between the balance blade and the free distal portions at the level of the fixing means. The embedding is thus a pivot point between the radial portion and the free distal portion, on each of the wings.
    [0008] This makes it possible to improve the precision of the time measurement of the composite balance, of the oscillating system and of the watch. In addition, this makes it possible to take into account the temperature variations undergone by the balance, the oscillating system and the watch and to compensate for these temperature variations by a variation in the inertia of the balance. Indeed, during a temperature variation, the respective elongations of the balance and of the balance blade are such that they will cause a pivoting of the free distal portions, with a pivot point at the level of the fixing means fixing the blade. balance to the free distal portions of the balance. In addition, the attachment of the balance blade to the free distal portions makes it possible not to be sensitive to shocks and not to lose precision in the measurement of time, while being more robust in the operating time.
    [0009] Advantageously, the free distal portions and the radial portions form an angle (i.e. a non-flat angle) and are included in a common plane.
    [0010] In other words, the free distal portions and the radial portions are offset and are not collinear.
    This ensures pivoting of the free distal portions in the plane of the balance forming a board.
    [0012] Advantageously, the balance forms a board (ie a flat and thin component).
    [0013] This makes it possible to reduce the bulk. In addition, this facilitates the pivoting of the free distal portions during a temperature variation.
    [0014] Advantageously, the free distal portions are arranged at the ends of the at least two wings.
    [0015] Advantageously, each of the free distal portions extends along a diameter from the at least two wings.
    In other words, the distal portions extend along a tangential component, the free distal portions thus having a tangential (or so-called angular) component in a system of polar coordinates.
    [0017] Advantageously, the free distal portions extend perpendicularly to the radial portions.
    This makes it possible to optimize the bulk of the composite balance and the inertia of the balance, in particular during temperature variations.
    Advantageously, each of the free distal portions comprises a plurality of holes, so as to receive the fixing means.
    [0020] Advantageously, the plurality of holes is arranged along a diameter.
    This makes it possible to facilitate the adjustment of the composite balance, of the oscillating system and of the watch, in particular by taking into account the predictable temperature ranges.
    [0022] Advantageously, the composite balance wheel further comprises decorative elements, such as precious stones, mounted in the holes of the plurality of holes not receiving fixing means, such as screws.
    This makes it possible to reinforce the aesthetic aspect, in particular flamboyant with the movement, while taking advantage of the available holes intended to receive the fixing screws, while making it possible to optimize the inertia of the composite balance. The precious stones can in particular be diamonds, sapphires, rubies, emeralds, or combinations thereof. The decorative elements can also be semi-precious stones or precious metals such as gold, silver or platinum.
    Advantageously, the composite balance wheel further comprises adjustment means, such as calibrated masses or calibrated adjustment screws, and in which each of the at least two wings further comprises a branch arranged to receive the adjustment means.
    [0025] In other words, the branch forms another distal portion or a branch of the wing.
    Advantageously, the free distal portions and the branches are arranged on either side of the at least two wings.
    In other words, for a wing, the distal portion extends in a first direction and the branch extends in a second direction.
    [0028] Advantageously, the branches are arranged on a diameter different from the free distal portions.
    Advantageously, the adjustment means are arranged on a diameter different from the free distal portions.
    This makes it possible to facilitate the setting and adjustment of the composite balance, of the oscillating system and of the watch.
    Advantageously, each of the free distal portions further comprises a thinned portion arranged on the side opposite to the free side of the free distal portion, so as to form a hinge with the radial portion.
    [0032] Advantageously, each of the free distal portions further comprises a thinned portion arranged on the side of the radial portion, so as to form a hinge with the radial portion.
    Advantageously, the thinned portion is arranged between the radial portion and the fixing means.
    [0034] Advantageously, the thinned portion is arranged at the end of the radial portion.
    This makes it possible to form a hinge so as to facilitate the pivoting of the free distal portion, in particular during temperature variation.
    Advantageously, the balance blade further comprises a perforated central portion so as to allow the passage of a balance shaft of the oscillating system.
    [0037] This allows the balance shaft to pass through, to facilitate assembly (and disassembly), and also to optimize the inertia of the composite balance and of the oscillating system.
    Advantageously, the two wings are collinear.
    This makes it possible to optimize the inertia of the composite balance wheel and of the oscillating system.
    [0040] Advantageously, the balance further comprises secondary wings.
    Advantageously, the secondary wings include other adjustment means, such as calibrated masses or adjustment screws.
    [0042] Advantageously, the first coefficient of thermal expansion is greater than the second coefficient of thermal expansion.
    [0043] Advantageously, the balance is formed from CuBe and the balance blade is formed from invar.
    Advantageously, the first coefficient of thermal expansion is less than the second coefficient of thermal expansion.
    Advantageously, the balance is formed from steel, in particular from non-magnetic steel, and the balance blade is formed from a material among glass, silicon or diamond.
    Advantageously, the balance is formed from CuBE and the balance blade is formed from silicon covered with diamond or from diamond.
    Advantageously, the balance is formed of steel, in particular of non-magnetic steel, and the balance blade is formed in invar.
    This makes it possible to optimize the inertia and the thermal behavior of the thermo-compensated balance and of the oscillating system, so as to improve the precision of the time measurement.
    Advantageously, the composite balance wheel further comprises secondary wings comprising at least one adjusting screw holder arranged to receive at least one fine adjustment screw mounted on the adjusting screw holder and at least one adjusting screw lock nut end.
    This makes it possible to prevent the fine adjustment screws from loosening in the event of vibrations, in particular due to the movement of the free distal portions in the event of a temperature variation.
    Advantageously, the hairspring and the balance blade are formed from the same material.
    Advantageously, the hairspring and the balance are formed from the same material.
    This makes it possible to improve the precision of the measurement of time, by improving the linearity and the thermomechanical coupling between the hairspring and the balance blade or between the hairspring and the balance.
    Advantageously, at least one of the balance, the balance blade, the fixing means such as screws, the adjustment means such as calibrated masses or calibrated adjustment screws comprises a luminescent material.
    Advantageously, at least one of the balance, the balance blade, or the fixing means such as screws comprises a luminescent material.
    Advantageously, the adjustment means such as calibrated masses or calibrated adjustment screws comprise a luminescent material.
    The term “luminescent material” means a material radiating light, in particular under certain conditions. Such materials can emit light of different colors, such as blue, green, pink, red, yellow, gold, orange in particular. In particular, reference is made to a material which emits or which has the property of emitting light without producing heat. Reference is also made to phosphorescent or fluorescent materials, that is to say materials emitting light in particular in darkness or semi-darkness (see also under certain angles of inclination in the event of glare). These are in particular materials that continue to emit light after being illuminated (i.e. residual materials). Phosphorescent materials such as rare earth aluminates (including scandium, yttrium and the fifteen lanthanides), strontium aluminates (SrAl2O4 or SrOAl2O3), Zinc sulfides, or Tritium are known, as well as their combinations. Such strontium aluminates, in the form of luminous paste or of pigments, are in particular available on the market from the company Nemoto, under the name LumiNova or pigments from LumiNova. They are also available from the company Tritec under the name SuperLuminova or Swiss SuperLumiNova.
    This makes it possible to provide a composite balance wheel emitting a residual light so as to facilitate reading and location, to ensure proper operation and to provide an elegant and fascinating aesthetic rendering.
    Advantageously, at least one of the balance, the balance blade, the fixing means such as screws, the adjustment means such as calibrated masses or calibrated adjustment screws comprises a layer of luminescent material.
    The luminescent material can be deposited by plating, painting, screen printing, tracing, vacuum deposition, 3D printing, molding or any other form of manufacture.
    This makes it possible to provide a composite balance emitting remanent light which is easy to manufacture. In addition, the layer of luminescent material can contribute to the thermal compensation when the balance or the balance blade comprises the luminescent material or a layer thereof, and this is particularly interesting with the use of glass, silicon or diamond. for the balance wheel or the balance blade. Indeed, the addition of the plating can modify the thermal expansion / retraction characteristics. The combination of a non-metallic balance or balance blade coated with such a luminescent material is particularly effective in obtaining differential expansions.
    A second aspect of the present invention relates to an oscillating system for a watch comprising:<tb> <SEP> - a balance shaft,<tb> <SEP> - a hairspring coupled to the balance shaft,<tb> <SEP> - a composite balance wheel according to the first aspect.
    This makes it possible to provide a precise and reliable oscillating system. In addition, this helps maintain precision while resisting impact. Further improving the aesthetic appearance, the oscillating system is easier to manufacture, assemble and adjust. Finally, the bulk is reduced.
    [0064] Advantageously, at least one of the composite balance, the balance shaft or the hairspring comprises a luminescent material or a layer of luminescent material.
    This makes it possible to provide a system emitting a persistent light so as to facilitate reading and locating, to ensure proper operation and to provide an elegant and fascinating aesthetic rendering. In addition, this makes it possible to improve the precision of the adjustment and / or of the verification of the oscillation frequency, by better recognition and visibility of the amplitude of the balance, in particular when the luminescent material is on the balance, the balance blade, the free distal portions, the adjustment studs, the secondary wings, or the adjustment masses.
    It is understood that the removal or manufacture of the luminescent material is carried out as described above.
    A third aspect of the present invention relates to a watch comprising an oscillating system according to the second aspect or a composite balance for an oscillating watch system according to the first aspect.
    This makes it possible to provide a watch with reduced bulk, improved aesthetics, effective protection in the event of an impact, and improved precision, in particular in the event of a temperature variation. In addition, the watch is easier to manufacture, assemble and adjust.
    Other characteristics and advantages of the present invention will emerge more clearly on reading the following detailed description of an embodiment of the invention given by way of non-limiting example and illustrated by the accompanying drawings, wherein :
    [0070] [Fig.1] shows a first embodiment of a composite balance for a watch oscillating system and of an oscillating system according to the present invention,
    [0071] [Fig.2] shows a detail view of a balance shaft of the oscillating system,
    [0072] [Fig.3] shows a second embodiment of the composite balance for an oscillating watch system and of the oscillating system according to the present invention,
    [0073] [Fig.4] shows a third embodiment of the composite balance for an oscillating watch system and of the oscillating system according to the present invention,
    [0074] [Fig.5] shows a fourth embodiment of the composite balance for an oscillating watch system and of the oscillating system according to the present invention,
    [0075] [Fig.6] shows a fifth embodiment of the composite balance for an oscillating watch system and of the oscillating system according to the present invention,
    [0076] [Fig.7] shows a schematic view of a watch according to the present invention,
    [0077] [Fig.8] shows another embodiment of the watch according to the present invention in which the composite balance and the oscillating system are mounted in a tourbillon.
    FIG. 1 represents a first embodiment of a composite balance for an oscillating system of a watch and of an oscillating system.
    The oscillating system 200 comprises a balance shaft 2, a hairspring 14 coupled to the balance shaft 2 at a first end of the hairspring 14 by means of a hairspring ring 13. The ferrule 13 is driven (ie mounted in force or by pressure) on the balance shaft 2, so as to be integral with the balance shaft 2. The hairspring 14 is clamped in the ferrule 13 at a pinching portion 13.1 and housed in a housing 13.2 of the shell 13 at a flat and bent end of the hairspring 14. The hairspring 14 comprises a Grosmann curve on the side of the balance shaft 2, on its internal coil, so as to cooperate with ferrule 13 and facilitate assembly and disassembly. The hairspring 14 is coupled to a pin 17 of the oscillating system 200 at the level of a second end of the hairspring 14. The pin 17 is installed on a pin support 15 integral with a bridge of a watch movement and fixed relative to it. to the hairspring 14. The eyebolt support 15 is fixed to the bridge by means of the eyebolt 16 screws. The hairspring 14 includes a Philips curve on its outer coil in connection with the eyebolt 17, in particular so as to improve its concentric development . The balance shaft 2 comprises a double plate 12 arranged to cooperate with an escapement system of the watch movement according to a well-known operation.
    [0080] The oscillating system 200 further comprises a composite balance 100.
    The composite balance 100 comprises a balance 1 formed in a first material having a first coefficient of thermal expansion. The balance 1 comprises a central portion 1.2 mounted on the balance shaft 2, and at least two wings. The two wings each comprise a radial portion 1.3 extending radially from the central portion 1.2. The two wings also each include a free distal portion 1.5. Preferably, the free distal portion 1.5 and the radial portion 1.3 form an angle between them, that is to say a non-flat angle. In other words, the free distal portion 1.5 and the radial portion 1.3 are not collinear and are offset. Preferably, the free distal portions 1.5 and the radial portions are included in the same plane.
    Preferably, the free distal portions 1.5 are arranged at the ends of the radial portions 1.3, so as to optimize the inertia of the balance 1.
    The composite balance 100 further comprises a balance blade 5, formed in a second material having a coefficient of thermal expansion different from the first coefficient of thermal expansion. The composite balance wheel 100 is thus formed from two materials having different thermal expansion coefficients.
    [0084] The balance blade 5 comprises a perforated or recessed central portion so as to free the passage for the balance shaft 2. Preferably, the balance blade 5 and the balance 1 are co-axial.
    The composite balance 100 further comprises fixing means 6, such as screws or screws within reach of the balance blade. The balance blade 5 is fixed to each of the free distal portions 1.5 by the fixing means 6 so as to cause pivoting of the free distal portions 1.5 during a temperature variation.
    The free distal portions 1.5 comprise holes 1.4, preferably threaded, so as to receive the fixing means 6. The rocker blade 5 comprises through holes for receiving the fixing means 6. A recess (or anchoring) is thus produced between the balance blade 5 and the free distal portions 1.5, at the level of the fixing means 6. In other words, the fitting is a pivot point between the free distal portion 1.5 and the radial portion 1.3, on each of the wings of the balance 1.
    Preferably, the balance 1 is flat and thin, so as to form a balance board, which facilitates the pivoting of the free distal portions 1.5 during temperature variation and reduces the overall height (in order to obtain for example an oscillating system 200 with a height of 3.81 mm).
    The temperature variation can occur in particular between the worn on the wrist of the user diffusing human warmth and the storage of the watch, or during a change in ambient temperature.
    Thus, during temperature variations, the balance 1 and the balance blade 5 exhibit a differential elongation. In the embodiment of Figure 1, the balance blade 5 is formed of a material having a coefficient of thermal expansion less than the coefficient of thermal expansion of the balance 1. For example, the balance blade 5 is formed in invar and balance 1 is made of CuBe. Therefore, in the event of an increase in temperature, the balance 1 will lengthen more than the balance blade 5 and the free distal portions 1.5 will pivot inward. This will make it possible to adjust the inertia of the composite balance wheel 100 as a function of temperature variations. Thus, whatever the temperature and its variations, the inertia of the composite balance wheel 100 is constant and the measurement of time carried out by the oscillating system 200 is more precise. In addition, the fixing means 6 and the fixing of the balance blade 5 to the free distal portions 1.5 prevent any drift in the measurement of time in the event of an impact. The pivoting of the free distal portions 1.5 is facilitated by the fact that the ends of the free distal portions 1.5 are free.
    The free distal portions 1.5 have a tangential component. Preferably, the free distal portions 1.5 extend over a diameter from the radial portions 1.3, for example over an external diameter of 16 mm. In an advantageous embodiment, the free distal portions 1.5 extend perpendicularly to the radial portions 1.3.
    In addition, the free distal portions 1.5 include adjustment masses 7 (or mass screw of the balance board). This makes it possible to adjust the inertia of the composite balance wheel 100 in a more precise and more predictable manner.
    The adjustment masses 7 are installed in holes 1.4 of the balance 1, preferably installed along the diameter along which the free distal portion 1.5 extends. The unoccupied 1.4 holes can thus be used to install decorative elements, such as precious stones, semi-precious stones or precious metals.
    The rocker 1 further comprises thinned portions 1.1 arranged on the side opposite to the free end of the free distal portions 1.5, so as to form a hinge between the radial portions 1.3 and the free distal portions 1.5 and facilitate pivoting during temperature variations. Preferably, the thinned portions 1.1 are made using circular notches so as to facilitate pivoting, while resisting material fatigue. Preferably, the thinned portions 1.1 are arranged perpendicular to the radial portions 1.3 so as to reduce the bulk.
    In addition, the balance 1 comprises branches 4 (or ramifications or other distal portions), preferably arranged at the level of the radial portions 1.3. The branches 4 serve as an adjustment stud support and support the adjustment studs 3. The branches 4 are fixed to the radial portions 1.3 by means of a screw and two pins, or can be formed in one piece or one-piece with the radial portions 1.3. Preferably, the branches 4 and the free distal portions 1.5 extend on either side of the radial portions 1.3, that is to say respectively in a first direction and in a second direction. The adjustment pads 3 are thus arranged on a different diameter from the adjustment masses 7. The adjustment pads 3 may have the shape of a disc as illustrated in FIG. 1, but may also have other shapes, in particular triangular, square, or elongated in particular along the radius of the balance 1.
    In addition, the balance 1 comprises secondary wings 1.6. The secondary wings 1.6 (or second pair of wings) include other adjustment means, so as to optimize the inertia of the composite balance 100 and facilitate its adjustment. Thus, the secondary wings 1.6 each include at their end a secondary wing support or adjustment screw holder 8, carrying an adjustment screw 10 (in particular a gold class adjustment screw) and a fine adjustment screw 9 screwed onto a fine adjustment screw locking locknut 11. Preferably, the adjustment screw holder 8 is fixed to the secondary wings using a screw and two pins, but it can also be made from a single holding with secondary wings 1.6. The nuts 11 are fine adjustment screw locknuts 11 cooperating with the fine adjustment screws 9 in order to prevent the fine adjustment screws 9 from being released as a result of potential vibrations of the free distal portions 1.5, in particular during temperature variation.
    In addition, the balance 1 or the balance blade 5 may comprise a luminescent material or a layer of luminescent material such as rare earth aluminates (comprising scandium, yttrium and the fifteen lanthanides), or aluminates strontium (SrAl2O4 or SrOAl2O3), or any other luminescent, phosphorescent or fluorescent material. Likewise, the fixing means 6 such as the fixing screws or the adjustment means such as the adjustment studs 3 may comprise the luminescent material. In general, all of the components of the composite balance wheel 100 or of the oscillating system 200 may include the luminescent material. This is the case for the balance shaft 2, the spiral 14, the free distal portions 1.5, the wings comprising the radial portions 1.3, the secondary wings 1.6 and the branches 4, the adjusting screw holder 8, the adjusting screws end 9, the fine adjustment screw locknuts 11, the eyebolt 17, the eyebolt support 15 and the eyebolt 16, the double plate 12, or even the screws and pins.
    FIG. 2 represents a detail view of a balance shaft of the oscillating system.
    As previously discussed, the shell 13 is driven (ie mounted in force or by pressure) on the balance shaft 2, so as to be integral with the balance shaft 2. The balance spring 14 is clamped in the shell 13 at the level of a pinching portion 13.1 and housed in a housing 13.2 of the ferrule 13 at the level of a flat and folded end 14.1 of the hairspring 14. The hairspring 14 comprises a Grosmann curve on the side of the balance shaft 2 , on its internal turn, so as to cooperate with the shell 13 and facilitate assembly and disassembly.
    The clamping of the hairspring 14 on the shell 13 is achieved by the pinch portion 13.1 which comprises a thin part and a part projecting opposite another part projecting from the inner side of the collar 13. In addition , the ferrule 13 further comprises a narrow part 13.3 serving as a guide for the flat and folded end 14.1 of the spiral housed in the housing 13.2 of the ferrule 13.
    [0100] The central portion 1.2 of the balance 1 is mounted on the balance shaft 2.
    [0101] FIG. 3 represents a second embodiment of the composite balance for a watch oscillating system and of the oscillating system.
    [0102] The reference signs of the other embodiments are used as much as necessary for the common parts.
    [0103] In the second embodiment, the coefficient of thermal expansion of the balance blade 5 is greater than the coefficient of thermal expansion of the balance 1.
    [0104] Thus, during an increase in temperature, the balance blade 5 will lengthen more than the balance 1. The free distal portions 1.5 will then tilt or pivot inward. The inertia of the composite balance wheel 100 is thus adjusted and kept constant as a function of temperature variations. Note that some materials can remain stable in case of temperature variation. Certain other materials also exhibit negative thermal expansion coefficients, and can therefore be used alone or as an alloy, in particular for stability or shrinkage in the event of an increase in temperature.
    In the second embodiment, the fixing means 6 are arranged on the side opposite to the free side of the free distal portions 1.5, on the other side of the radial portions 1.3. In other words, the fixing means 6 and the adjustment masses 7 are arranged on either side of the axis of the radial portions 1.3. Thus, the free distal portions 1.5 comprise a main portion on which the adjustment masses 7 are mounted and a secondary portion, on the other side of the axis of the radial portion 1.3, comprising a tapped hole to receive the fixing means. 6. The thinned portions 1.1 are thus positioned in the axis of the radial portions 1.3.
    The ground pads 3 are arranged on the branches 4 on the same side as the adjustment masses 7 (that is to say on the side of the main portion of the free distal portions 1.5), so as to facilitate the balancing.
    [0107] FIG. 4 represents a third embodiment of the composite balance for an oscillating system of watches and of the oscillating system.
    [0108] The reference signs of the other embodiments are used as far as necessary for the common parts.
    In the third embodiment, the free distal portions 1.5 comprise a top portion 1.8 perpendicular to the main plane of the balance 1. The adjustment masses 7 are arranged on the top portions 1.8.
    [0110] The mass pads 3 and the free distal portions 1.5 are arranged on either side of the radial portions 1.3, by each radial portion 1.3.
    The fixing means 6 fixing the balance blade 5 to the free distal portions 1.5 are arranged on the same side as the free distal portions 1.5 with respect to the axis of the radial portions 1.3.
    In the third embodiment, the coefficient of thermal expansion of the balance blade 5 is less than the coefficient of thermal expansion of the balance 1 (as for the embodiment of FIG. 1).
    [0113] FIG. 5 represents a fourth embodiment of the composite balance for an oscillating system of watches and of the oscillating system.
    [0114] The reference signs of the other embodiments are repeated as much as necessary, for the common parts.
    In the fourth embodiment, the free distal portions 1.5 include the high portions 1.8. The fixing means 6 for fixing the balance blade 5 are arranged on the other side of the main portion of the free distal portions 1.5.
    In the fourth embodiment, the coefficient of thermal expansion of the balance blade 5 is greater than the coefficient of thermal expansion of the balance 1 (as for the embodiment of FIG. 3).
    [0117] FIG. 6 represents a fifth embodiment of the composite balance for a watch oscillating system and of the oscillating system.
    [0118] The reference signs of the other embodiments are used as much as necessary for the common parts.
    [0119] In the fifth embodiment, the free distal portions 1.5 are fixed to the radial portions 1.3 by means of a connecting piece for the balance weight holder 17.2, fixed using a screw and two pins to the radial portions 1.3.
    [0120] The free distal portions 1.5 are formed by a balance weight carrier 17, which is an attached part. The balance weight carrier 17 comprises a thinned portion 17.1 forming a hinge.
    [0121] The fixing means 6 make it possible to fix the balance blade 5 to the free distal portions 1.5, formed by the balance weight holder 17.
    [0122] In all the embodiments, the materials of the balance 1 and of the balance blade 5 are not limited to specific examples, provided that they have different thermal expansion coefficients (lower or higher). Thus, by way of nonlimiting examples, the materials can in particular be chosen from all the combinations of possible pairs between silicon (in particular silicon coated with diamond), copper, copper-beryllium (CuBe) alloys, steel, in particular non-magnetic or antimagnetic, paramagnetic or even diamagnetic steels, iron (64%) and nickel (36%) alloys (otherwise called invar), hardenable austenitic superalloys based on cobalt (in particular the proportions 40% Co, 20% Cr, 16% Ni, 7% Mo and Fe, known by the name of Phynox or Elgiloy), materials having a negative coefficient of expansion (notably zirconium tungstate, copper and iron germinate, borate strontium and copper, libethenite), plastic polymers such as polyamide, ceramic, diamond, glass, glass-ceramics (eg zerodur), sapphire, and their derivatives and alloys.
    [0123] FIG. 7 represents the watch comprising the composite balance wheel and the oscillating system according to any one of the embodiments described above.
    [0124] The watch 300 comprises a watch case 302 or watch case which is adapted to receive a complete watch mechanism or also called a watch movement 301 allowing the running of the hour, minute and second hands, as well as of other functions such as date or moon phase indication. In addition, the watch 300 comprises the composite balance 100 according to any one of the preceding embodiments and the oscillating system 200 according to any one of the preceding embodiments.
    [0125] Watch 300 further includes a crown 305 allowing the user of watch 300 to adjust watch 300, in particular to allow winding and / or fine adjustment and positioning of the hands, or any other adjustment functions. or display of functions of the watch 300, such as power reserve, moon phase, stop balance, equation of time, without being limited to these functions. Watch 300 further comprises a bracelet 303 linked to watch case 302 and an attachment system 304, so as to allow watch 300 to be worn on the user's wrist.
    [0126] FIG. 8 represents the watch comprising the composite balance wheel and the oscillating system according to any one of the embodiments described above, mounted on a tourbillon.
    [0127] Watch 300 further comprises a tourbillon visible at 6 o'clock in which is installed the composite balance 100 according to any embodiment and the oscillating system 200 according to any embodiment.
    [0128] The case 302 as well as the watch crystal, made of glass, plastic, plexiglass, sapphire or any other suitable material, protecting the watch 300, are perforated, so as to make the tourbillon, the composite balance 100 and the oscillating system 200. Aesthetics and reading are thus favored, in particular when the tourbillon acts as a small seconds.
    It will be understood that various modifications and / or improvements obvious to a person skilled in the art can be made to the various embodiments of the invention described in the present description.
    [0130] In particular, reference is made to the possibility of providing several balance blades, or of providing variant shapes of the free distal portions, or a different number of adjustment mass. Reference is also made to the possibility of providing another balance blade in order to connect the adjustment studs to one another, or to connect two other free radial portions, in particular arranged on a diameter different from the free radial portions. In addition, reference is made to the possibility of varying the locations of the adjustment masses, adjustment screws and earth studs. Finally, reference is made to the possibility of having a balance blade shorter than the balance so as to create a pivoting at the level of the fixing means, even with materials having little different, or even substantially identical, thermal expansion coefficients. , using the rigidity of the assembly. Finally, reference is made to the possibility of having the free distal portions pivot outwards in order to adjust or maintain the inertia of the balance as a function of temperature variations,
    权利要求:
    Claims (15)
    [1]
    1. Composite balance wheel (100) for the oscillating system (200) of a watch comprising:- a balance (1) formed in a first material having a first coefficient of thermal expansion andincluding:- a central portion (1.2),- at least two wings each comprising a radial portion (1.3) extending radially from the central portion (1.2) and a free distal portion (1.5),- a balance blade (5) formed in a second material having a second coefficient of thermal expansion different from the first coefficient of thermal expansion,characterized in that the composite balance wheel (100) further comprises:- fixing means (6), such as screws,and in that the balance blade (5) is fixed to each of the free distal portions (1.5) by the fixing means (6), so as to cause a pivoting of the free distal portions (1.5) during a variation of temperature.
    [2]
    2. Composite balance (100) for an oscillating system (200) for a watch according to the preceding claim, in which each of the free distal portions (1.5) extends along a diameter from the at least two wings.
    [3]
    3. Composite balance (100) for an oscillating system (200) for a watch according to any one of the preceding claims, further comprising adjustment means (3), such as calibrated masses or calibrated adjustment screws, and in which each of the at least two wings further comprises a branch (4) arranged to receive the adjustment means (3).
    [4]
    4. Composite balance (100) for an oscillating system (200) for a watch according to any one of the preceding claims, in which each of the free distal portions (1.5) further comprises a thinned portion (1.1) arranged on the side of the radial portion. (1.3), so as to form a hinge with the radial portion (1.3).
    [5]
    5. Composite balance (100) for an oscillating system (200) of watch according to any one of the preceding claims, in which the first coefficient of thermal expansion is greater than the second coefficient of thermal expansion.
    [6]
    6. Composite balance (100) for an oscillating system (200) of watch according to any one of claims 1 to 4, wherein the first coefficient of thermal expansion is less than the second coefficient of thermal expansion.
    [7]
    7. Composite balance (100) for an oscillating system (200) of a watch according to any one of claims 1 to 4, wherein the balance (1) is formed of steel, in particular of non-magnetic steel, and the balance blade (5). ) is formed in one material among glass, silicon or diamond.
    [8]
    8. Composite balance (100) for an oscillating system (200) for a watch according to any one of claims 1 to 4, wherein the balance (1) is formed of CuBE and the balance blade (5) is formed of coated silicon. diamond or diamond.
    [9]
    9. Composite balance (100) for an oscillating system (200) for a watch according to any one of claims 1 to 4, wherein the balance is formed of steel, in particular of non-magnetic steel, and the balance blade (5) is formed. in invar.
    [10]
    10. Composite balance wheel (100) according to any one of the preceding claims, further comprising secondary wings (1.6) comprising at least one adjusting screw holder (8) arranged to receive at least one fine adjustment screw (9) mounted. on the adjustment screw holder (8) and at least one fine adjustment screw lock nut (11).
    [11]
    11. Composite balance (100) according to any one of the preceding claims, in which at least one of the balance (1), the balance blade (5), or the fixing means (6) such as screws, comprises luminescent material.
    [12]
    12. Composite balance (100) according to claim 3, in which the adjustment means (3), such as calibrated masses or calibrated adjustment screws, comprise a luminescent material.
    [13]
    13. Oscillating system (200) for watch comprising:- a balance shaft (2),- a hairspring (14) coupled to the balance shaft (2),- A composite balance (100) according to any one of the preceding claims.
    [14]
    14. The oscillating system (200) for a watch according to the preceding claim, wherein at least one of the composite balance (100), the balance shaft (2) or the hairspring (14) comprises a luminescent material or a layer of material. luminescent.
    [15]
    15. Watch comprising an oscillating system (200) according to the preceding claim or a composite balance (100) for an oscillating watch system according to any one of claims 1 to 13.
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    同族专利:
    公开号 | 公开日
    FR3093825A1|2020-09-18|
    FR3093825B1|2021-04-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB256953A|1925-08-13|1927-02-17|Paul Ditisheim|Improvements in regulating-devices for clockwork mechanism|
    JP6066573B2|2012-02-29|2017-01-25|セイコーインスツル株式会社|Balance, watch movement, and watch|
    CH710866A2|2015-03-02|2016-09-15|L Leroy S A|Sprung balance self-compensated for the clock movement.|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR1902592A|FR3093825B1|2019-03-13|2019-03-13|THERMOCOMPENSE OSCILLATING SYSTEM|EP20159528.7A| EP3709099A1|2019-03-13|2020-02-26|Thermocompensated oscillating system|
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