• 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 an oscillator (10) for a watch movement comprising a spiral (11) made of paramagnetic or diamagnetic material and an assembled rocker (12) comprising a shaft (13) on which are mounted the following elements: a rocker arm (14) ), a plate (15) and a shell (16) integral with said hairspring (11), characterized in that the maximum diameter (Dmax) of the shaft is less than 3.5, or even 2.5 or even twice the minimum diameter of the hairspring shaft on which is mounted one of the elements or in that the maximum diameter (Dmax) of the shaft is less than 1.6, or 1.3 times the maximum diameter of the shaft on which is mounted one of the elements. Said oscillator minimizes or cancels the residual ρ effect, negative or positive, for magnetic fields that the wearer of a watch is likely to encounter in his daily life.
    公开号:CH705655B1
    申请号:CH02073/12
    申请日:2012-10-23
    公开日:2016-12-15
    发明作者:Bertrand Jean-Louis；Boulenguiez Benoît；Cimprich Thomas；Behrend Raoul
    申请人:Rolex Sa；
    IPC主号:
    专利说明:

    The invention relates to an oscillator of a watch movement. The invention also relates to a watch movement and a timepiece comprising such an oscillator.
    The accuracy of mechanical watches depends on the stability of the frequency of the oscillator which consists of a balance and a spiral. However, this frequency is disturbed if the watch is exposed to a magnetic field, so that a difference in operation before and after magnetization of the movement is noted. This difference in market can be negative or positive. Regardless of its sign, this difference is referred to as the "residual effect" or "residual run" and is measurable according to NIHS 90-10. This standard aims to certify wristwatches with good chronometric behavior following exposure to a magnetic field of 4.8 kA / m (60 G). However, the wearer of the watch may be brought to meet in his daily magnetic fields of intensities much higher, of the order of 32 kA / m (400G). This effect should therefore be minimized for fields of such intensities.
    The vast majority of the spirals are made from Fe-Ni alloys (Nivarox® alloy for example) whose elastic modules depend on the magnetization state. Recent developments have led to the development of self-compensating spirals made of paramagnetic materials (alloy Nb-Zr-O, Parachrom <®> for example) or diamagnetic materials (silicon coated with a layer of SiO2 for example) which makes it possible to reduce very clearly the residual effect for a magnetic field greater than 4.8 kA / m, as shown in FIG. 1. However, a residual effect remains, in particular for a magnetic field with an intensity substantially greater than 4.8 kA / m, for example 32 kA / m.
    In general, the structure of a pendulum assembled within an oscillator is as represented by the NIHS 34-01 standard. Fig. 3 illustrates such an assembled balance structure. The hub of the balance is directly attached to the balance shaft, for example by riveting. Its location and its seat are ensured by a bearing surface which is defined by the diameter of a flange present on the axis, which is also called seat diameter of the balance according to the terminology of NIHS 34- 01. A plate, generally machined CuBe2, on which is disposed an anchor, is driven on a portion of axis whose diameter is substantially less than that of the seat of the balance, regardless of the hub of the balance on the other side of the collar. The shell, intended to hold the hairspring, is on the other hand driven on the other side of the collar on a portion of axis whose diameter is also substantially less than that of the seat of the balance as illustrated in FIG. fig. 2. Such a balance structure has established itself as a reference because of its robustness and simplicity of assembly that results. Such an assembled balance structure concerns in particular any oscillator having a paramagnetic or diamagnetic spiral. For example, patent CH 700 032 discloses an oscillator with at least two spirals, for example made of silicon, which are mounted on a balance shaft as described above. This oscillator, by the properties of the material chosen for the hairspring, makes it possible to reduce the residual effect for a magnetic field of the order of 4.8 kA / m, but does not make it possible to minimize it for a magnetic field substantially greater than 4.8 kA. / m, for example 32 kA / m.
    The object of the invention is to provide an oscillator overcoming the disadvantages mentioned above and improving the known oscillators of the prior art. In particular, the invention proposes an oscillator which minimizes, or even cancels, the residual effect, negative or positive, for magnetic fields that the wearer of the watch is likely to encounter in his daily life, in particular higher magnetic fields, or substantially greater than 4.8 kA / m, for example 32 kA / m.
    An oscillator according to the invention is defined by claim 1.
    Different embodiments of an oscillator are defined by the dependent claims 2 to 10.
    [0008] A watch movement according to the invention is defined by claim 11.
    [0009] A timepiece according to the invention is defined by claim 12.
    The accompanying drawings show, by way of example, three embodiments of an oscillator according to the invention.<tb> Fig. 1 <SEP> is a graph showing the residual step M of different movements according to the magnetic field B to which these movements are subjected. Curve 1 illustrates the residual march M of a movement with an oscillator having a magnetic hairspring (Nivarox <®>). Curve 2 illustrates the residual path M of a motion with an oscillator having a paramagnetic spiral (Parachrom <®>). Finally, curve 3 illustrates the residual path M of a movement with an oscillator having a diamagnetic spiral (silicon coated with a SiO 2 layer).<tb> Fig. 2 <SEP> is a view of a known oscillator of the prior art.<tb> Fig. 3 <SEP> is a detail view of an assembled pendulum structure of the oscillator of FIG. 2.<tb> Figs. 4 and 5 <SEP> are views of a first variant of a first embodiment of an oscillator according to the invention.<tb> Fig. 6 <SEP> represents a second variant of a first embodiment of an oscillator according to the invention.<tb> Fig. 7 <SEP> represents a third variant of a first embodiment of an oscillator according to the invention.<tb> Fig. 8 <SEP> is a view of a variant of a second embodiment of an oscillator according to the invention.<tb> Fig. 9 <SEP> is a view of a first variant of a third embodiment of an oscillator according to the invention.<tb> Fig. <SEP> is a view of a second variant of a third embodiment of an oscillator according to the invention.<tb> Fig. 11 <SEP> is a view of a third variant of a third embodiment of an oscillator according to the invention.<tb> Fig. 12 <SEP> is a table showing the residual course of a motion subjected to a given magnetic field as a function of the material of a balance shaft of an oscillator known from the state of the art as shown in FIGS. 2 and 3. It also shows the residual oscillator steps performed according to a first and a second embodiment of the invention.
    FIG. 13 is a graph showing, by way of comparison, the residual step M of four movements as a function of the magnetic field B to which they have been subjected, a first movement comprising an oscillator produced according to the first variant of the first embodiment of the invention and three movements comprising an oscillator made according to the prior art. Curve 1 illustrates the residual path M of a movement equipped with an oscillator equipped with an assembled balance, provided with a flange balance shaft, which is associated with a Nivarox ® spiral. Curve 2 illustrates the residual path M of a movement equipped with an oscillator equipped with an assembled balance wheel, provided with a balance shaft without collar, which is associated with a Nivarox ® spiral. Curve 3 illustrates the residual step M of a movement provided with an oscillator provided with an assembled balance wheel, provided with a flange balance pin, which is associated with a paramagnetic balance spring. Finally, curve 4 illustrates the residual path M of a movement provided with an oscillator made according to the first variant of the first embodiment of the invention.
    FIG. 14 is a graph showing, by way of comparison, the residual step M of two movements as a function of the magnetic field B to which they have been subjected, a first movement comprising an oscillator made according to the first variant of the third embodiment of the invention (curve 1 of the graph) and the second movement comprising an oscillator made according to the prior art and equipped with a spiral type Nivarox <®> (curve 2 of the graph).
    The Applicant has noticed that the geometry of the balance shaft has a surprising influence on the residual effect. More particularly, following various studies conducted by the Applicant, it has been noted that the minimization, or even the suppression, of the larger diameter portion, called the balance arm according to the terminology of NIHS 34-01, or called usually "collar", allows to minimize the residual effect in the same way that a balance shaft made of a paramagnetic material such as CuBe2, as shown in the table of FIG. 12. It is then noted that associating a paramagnetic or diamagnetic spiral with an assembled balance wheel provided with a flange axis with a flange according to the state of the art does not produce the same effects as associating a paramagnetic or diamagnetic spiral with an assembled balance. equipped with a balance shaft according to the invention. More particularly, the fact of associating a paramagnetic or diamagnetic balance spring with an assembled balance beam provided with a balance shaft according to the invention makes it possible, for a magnetic field of 32 kA / m (400G), to considerably minimize the residual gait, even cancel, the parasitic torque disturbing the return torque of the spiral then being due to the presence of magnetic components that surround the oscillator.
    Referring to the graph of FIG. 13, it can be seen that adding a paramagnetic spiral to an assembled balance provided with a flanged beam axis makes it possible, for a magnetic field B of 32 kA / m (400G), to reduce the residual step M by about a factor 2 compared to the same assembled balance that is associated with a spiral type Nivarox <®>. Surprisingly, it is noted that associating a paramagnetic balance with an assembled balance wheel provided with a balance shaft without collar, as proposed in the first variant of the first embodiment of the invention, makes it possible, for a magnetic field of 32 kA / m (400G), reduce the residual gait by about a factor of 12 compared to the same assembled balance that is combined with a spiral type Nivarox <®>. It should also be noted that the oscillator of the first embodiment of the invention makes it possible, for a magnetic field of 32 kA / m (400G), to reduce the residual gait very significantly, by a factor of about 17, by compared to an assembled balance which has a flanged axis and which is combined with a spiral of the type Nivarox <®>. In particular, as shown in FIG. 13, for magnetic fields between 15 and 32 kA / m, it has been noted that there is a synergistic effect vis-à-vis the magnetic phenomenon between the paramagnetic or diamagnetic balance and the geometry of the axis . Indeed, the combined effect of the spiral material change and the modification of the axis geometry goes beyond the sum of the individual effects of the spiral material change and the modification of the geometry of the spiral. axis the effects.
    Referring to the graph of FIG. 14, it is surprisingly noted that associating a diamagnetic spiral with an assembled balance provided with a balance shaft whose maximum diameter is minimized, as proposed in the first variant of the third embodiment of the invention , allows, for a magnetic field B of 32 kA / m (400G), to reduce the residual step M very significantly, by a factor of about 35, compared to an assembled balance which comprises a flange axis and which is combined with a Nivarox <®> spiral.
    Thus, the invention relates to an oscillator comprising a spiral of paramagnetic or diamagnetic material and a pendulum assembled within this oscillator comprising a steel shaft whose maximum diameter is minimized on which are mounted a balance, a plate and the shell of said hairspring. In a first case, the ferrule can be referred to the spiral. In this case, it is preferably made of a cuprous alloy such as brass or CuBe 2, or else of a stainless steel. In a second case, the ferrule may have come from manufacture with the spiral, for example when the spiral is made of silicon. The ferrule is in this case also made of silicon. The shaft is made of steel to meet the mechanical stress to which the oscillator is subjected. The plate and the balance are, for their part, machined in a paramagnetic or diamagnetic material, for example a cuprous alloy such as CuBe2 or brass, silicon or nickel-phosphorus. Preferably, the maximum diameter Dmax of the shaft is less than 3.5, or even 2.5 or even twice the minimum diameter D1 of the shaft on which is mounted one of the elements of the oscillator. More preferably, the maximum diameter Dmax of the shaft is less than 2, even 1.8 or 1.6, or even 1.3 times the maximum diameter D2 of the shaft on which is mounted one of the oscillator elements. Thus, the residual effect is greatly minimized because the parasitic torque disturbing the return torque of the hairspring is then mainly due to the presence of the magnetic components surrounding the oscillator. Of course, the minimization of the residual effect can be further increased by realizing the components that are located near the oscillator according to the invention, for example the components of the escapement such as the anchor or the wheel. anchor, made of paramagnetic or diamagnetic materials.
    According to a first embodiment of the invention, the smallest diameter D1 of the portion of the shaft on which is mounted a member of the oscillator (selected from the group: ferrule, plate, balance) has a value worth Dmax which corresponds to the largest diameter of the tree. Furthermore, the largest diameter D2 of the portion of the shaft on which is mounted an element of the oscillator also has a value corresponding to that of the largest diameter Dmax of the shaft. Thus, in this first embodiment, Dmax = D1 = D2.
    According to a second embodiment of the invention, the largest diameter D2 of the portion of the axis on which is mounted an element of the oscillator also corresponds to the diameter Dmax but differs from the smaller diameter D1 of the portion of the shaft on which is mounted an element of the oscillator. Thus, in this second embodiment, Dmax = D2> D1.
    According to a third embodiment, the largest diameter D2 of the portion of the axis on which is mounted an element of the oscillator differs from the largest diameter of the axis Dmax but may be greater than or equal to small diameter D1 of the portion of the shaft on which is mounted an element of the oscillator. Thus in this third embodiment, Dmax> D2 ≥ D1.
    A first variant of the first embodiment of the oscillator according to the invention is described below with reference to FIGS. 4 and 5. The oscillator 10 comprises a hairspring 11 made of paramagnetic or diamagnetic material and an assembled rocker 12 comprising a shaft 13 on which are mounted a rocker 14, a plate 15 and the shell 16 of said hairspring. In this first variant, the rocker 14 is integral with the shaft 13 via the plate 15. The latter is attached, for example by driving, on a portion 135 and sleeve the shaft 13 on a height H. The diameter of this portion 135 is equal to the maximum diameter Dmax. The rocker 14 is, meanwhile, attached to the plate 14, for example by riveting, on a seat surface 131 made on the plate. The shell is, as for it, directly mounted on the tree. It can be fixed, for example, by hunting. The ferrule is mounted on a portion 136 of the shaft whose diameter is equal to the maximum diameter Dmax of the shaft. In this first variant of the first embodiment, the smallest diameter D1 of the portion of the shaft on which is mounted an element (selected from the group: shell, plate, balance) corresponds to the value Dmax which is equal to the large diameter of the tree. Furthermore, the largest diameter D2 of the portion of the shaft on which is mounted an element also has a value that coincides with that of the largest diameter of the shaft. Thus, in this first variant of the first embodiment, Dmax = D1 = D2. This value is of the order of 0.5 mm within the design illustrated in FIGS. 4 and 5.
    Measurements have been made for magnetic fields at different intensity levels so as to compare the residual step of the first variant of the first embodiment of the oscillator and those of oscillators known in the art. prior. As shown in FIG. 13, that the average residual step of a movement with the first variant of the first embodiment of the oscillator, for a magnetic field of 32 kA / m, is of the order of 2 s / d (curve 4 of FIG. graph), a decrease of about a factor of 12 compared to a movement with a known oscillator equipped with a Nivarox <®> spiral and a balance shaft without flange (curve 2 of the graph ). It can also be seen that the average residual march of a movement equipped with an oscillator equipped with an assembled balance, provided with a flange balance shaft, which is associated with a paramagnetic spiral, for a magnetic field of 32 kA / m, is of the order of 15 s / d (curve 3 of the graph), a decrease of about a factor 2 compared to that of a movement with the same assembled balance that is associated with a spiral Nivarox <® >. Thus, it can be seen that combining a paramagnetic spiral with an assembled balance wheel having an axis devoid of a flange produces an unexpected effect on the residual step of a movement, namely, its clear minimization, or even its cancellation, for a magnetic field of 32kA / m (400G).
    In addition, this factor is likely to increase by minimizing the number of magnetic components surrounding the oscillator within the movement considered.
    A second variant of the first embodiment of the oscillator is described below with reference to FIG. 6. In this second variant, the elements that are identical or have the same function as the elements of the first variant have a "2" at the tens digit in place of the "1" and have the same digit of the units. The parts or portions of these elements also have a "2" in the number of hundreds instead of the "1" parts or equivalent portions of the elements of the first variant and have the same number of tens. As in the first variant of the first embodiment, Dmax = D1 = D2. This value is of the order of 0.3 mm within the design illustrated in FIG. 4. This second variant differs from the first variant in that the plate 25 lugs the shaft over substantially its entire length and / or in that the shell 26 is fixed to the shaft via the plate. In other words, the shell 26 is fixed, for example by driving, on the plate 25.
    The measurements show that this modification has very little effect on the minimization of the residual effect. Whatever the variant considered, the average residual path, for a magnetic field of 32 kA / m, is 2 s / d, a decrease of a factor 8 compared to that of a movement with a design known from the state of the art as illustrated in FIGS. 2 and 3 and equipped with a paramagnetic spiral.
    According to the first two variants of the first embodiment, the rocker is secured to the shaft via the plate. Compared to the usual known structure of the prior art, the flange of the shaft is thus removed and the balance plate assembly can be directly attached to the shaft, for example by driving. Alternatively, according to a third variant of the first embodiment, the balance is directly attached to a portion of the shaft whose diameter is equal to those portions on which are reported the plate and the ferrule. Thus, the balance can be attached to the shaft independently of the plateau.
    In this third variant of the first embodiment illustrated in FIG. 7, elements identical or having the same function as the elements of the first variant of the first embodiment have a "3" in the first digit (tens or hundreds) instead of "1" and have the same second digit (units or tens). The rocker 34 is fixed on a portion 334 independently of the plate 35 which is attached to a portion 335. To do this, the hub of the rocker 34 has a total height H sufficient, in particular equal to or substantially equal to the height of the portion 334, in order to guarantee a sitting and a holding torque of the appropriate balance. The ferrule is, in turn, fixed on a portion 336, for example by driving. The diameter of each of the portions 334, 335, 336 is equal to the maximum diameter Dmax of the shaft. Thus, just as in the first two variants, Dmax = D1 = D2. This value is of the order of 0.4 mm within the design illustrated in FIG. 7. The measurements show that the average residual step of a movement equipped with an oscillator made according to this third variant, for a magnetic field of 32 kA / m, is equivalent to that of a movement provided with an oscillator made according to one or the other of the first two variants, namely about 2 s / d.
    The second embodiment differs from the first embodiment in that the value of the largest diameter of the shaft Dmax does not coincide with that of the minimum diameter D1 of the shaft on which is mounted one of the elements. chosen from the group ferrule, plateau, pendulum. In other words, Dmax = D2> D1. A variant of the second embodiment of the oscillator is described below with reference to FIG. 8. In this second embodiment, elements identical or having the same function as the elements of the first variant of the first embodiment have a "4" at the first digit (tens or hundreds) instead of "1" and present the same second digit (units or tens). In this embodiment, the ferrule 46 is attached to the shaft 43 at a portion 436, for example by driving. The plate 45 is for example thrown in abutment on a portion 435. The diameter of this portion is equal to the minimum diameter D1 of the axis on which is mounted an element. The rocker 44 is, meanwhile, directly mounted on the shaft 43 at a portion 434, for example by driving, regardless of the location of the plate 45. To do this, the hub of the balance 44 has a total height H sufficient, in particular equal to or substantially equal to the height of the portion 434, so as to ensure a sitting and a holding torque of the balance. The diameter of this portion 434 is equal to the maximum diameter D2 of the axis on which is mounted an element. It also corresponds to the diameter Dmax. Thus, in this embodiment, Dmax = D2> D1. Preferably, the maximum diameter Dmax of the shaft is less than 3.5, or 2.5 or even 2 times the minimum diameter D1 of the shaft on which is mounted one of the elements. In the example illustrated in FIG. 8, D1 is of the order of 0.4 mm, D2 and thus Dmax are of the order of 0.8 mm. Thus, Dmax is less than about 2.5 times the diameter D1.
    Measurements have been made for a magnetic field of 32 kA / m so as to compare the residual step of this variant of the second embodiment of the oscillator and that of a known oscillator of the prior art. as illustrated in FIGS. 2 and 3, both being provided with a paramagnetic spiral. The table in fig. 12 shows that the average residual path for a magnetic field of this intensity is of the order of 2 s / d, a decrease of about a factor of 8 compared to that of a movement with a known oscillator and equipped with a paramagnetic or diamagnetic spiral.
    The third embodiment differs from the second embodiment in that the value of the largest diameter of the shaft Dmax does not coincide with that of the maximum diameter D2 of the shaft on which is mounted one of the elements. chosen from the group ferrule, plateau, pendulum. Thus, Dmax> D2 ≥ D1.
    A first variant of the third oscillator embodiment according to the invention is described below with reference to FIG. 9. In this first variant of the third embodiment, the elements that are identical or have the same function as the elements of the first variant of the first embodiment have a "5" at the first digit (tens or hundreds) in place of the "1". and have the same second digit (units or tens). The ferrule 56 is directly mounted on the shaft 53 at a portion 536, for example by driving. The plate 55 is also directly mounted on the shaft 53. It is, for example, thrust against the shaft 53 at a portion 535. The diameter of this portion is equal to the minimum diameter D1 of the axis on which is mounted an element. The balance is attached to the shaft at a portion 534, for example by driving. To do this, the hub of the balance 54 has a total height H sufficient, in particular equal to or substantially equal to the height of the portion 534, so as to ensure a sitting and a holding torque of the appropriate balance. The diameter of this portion 534 is equal to the maximum diameter D2 of the axis on which an element is mounted. In this first variant of the third embodiment, a shaft portion 533 has a diameter Dmax greater than the diameters D1 and D2. Thus, this portion has shoulders against which the rocker and / or the ferrule are likely to bear when they are fixed on the shaft. In this way, the position of the balance and that of the ferrule can be precisely defined.
    In this first variant of the third embodiment, Dmax> D2> D1, and the maximum diameter Dmax of the shaft is less than 3.5, or 2.5 or even twice the minimum diameter D1 of the shaft on which is mounted one of the elements and / or the maximum diameter Dmax of the shaft is less than 2, 1.8 or 1.6, or 1.3 times the maximum diameter D2 of the shaft on which is mounted one of the elements. In the example illustrated in FIG. 9, D1 is of the order of 0.3 mm, D2 is of the order of 0.8 mm, and Dmax is of the order of 1 mm. Thus, Dmax is less than about 3.5 times the diameter D1, and Dmax is less than about 1.3 times the diameter D2. Within a known design of the state of the art as represented in FIGS. 2 and 3 in which Dmax> D2> D1, D1 is of the order of 0.3 mm, D2 is of the order of 0.8, and Dmax is of the order of 1.4 mm. Dmax is then greater than 4.5 times the diameter D1, and Dmax is then greater than 1.6 times the diameter D2. It is therefore found that the largest diameter of the shaft Dmax is greatly minimized with respect to the largest diameter Dmax of a shaft equipping a known oscillator of the state of the art. Thus, the residual effect is minimized because the parasitic torque disturbing the return torque of the hairspring is then mainly due to the presence of the magnetic components surrounding the oscillator. Fig. 14 shows the residual march of the first variant of the third embodiment of the oscillator compared to that of a known oscillator which comprises a flange axis and which is equipped with a spiral Nivarox type <®>. It can be seen that the average residual path for a magnetic field of 32 kA / m is of the order of 1 s / d, a very significant decrease by a factor of 35 compared to that of a movement equipped with the oscillator supra.
    A second variant of the third embodiment of the oscillator according to the invention is described below with reference to FIG. 10. In this second variant of the third embodiment, the elements that are identical or have the same function as the elements of the first variant of the first embodiment have a "6" at the first digit (tens or hundreds) in place of the "1". and have the same second digit (units or tens). As in the first variant of the third embodiment, Dmax> D2> D1. This second variant differs from the first variant in that the rocker 64 is integral with the shaft 63 via the plate 65. The latter is attached, for example by driving, on a portion 635 and sleeve the shaft 63 on a height H1. The diameter of this portion 635 is equal to the minimum diameter D1 of the shaft on which is mounted an element of the oscillator. The balance is mounted in abutment on the plate, for example by driving. To do this, the hub of the balance 64 has a total height H2 sufficient, in particular equal to or substantially equal to the height of the portion 654 of the plate 65, so as to ensure a sitting and a holding torque of the balance. The shell is, however, attached to a portion 636 of the shaft 63, for example by driving. The diameter of this portion 635 is equal to the maximum diameter D2 of the shaft on which is mounted an element of the oscillator. In this second variant of the third embodiment, a shaft portion 633 has a diameter Dmax greater than the diameters D1 and D2. Thus, this portion has shoulders against which the plate and / or the ferrule are likely to bear when they are fixed on the shaft. In this way, the position of the balance and that of the ferrule can be precisely defined. In this second variant of the third embodiment, Dmax> D2> D1, and the maximum diameter Dmax of the shaft is less than 3.5, or 2.5 or even twice the minimum diameter D1 of the shaft on which is mounted the one of the elements and / or the maximum diameter Dmax of the shaft is less than 2, 1.8 or 1.6, or even 1.3 times the maximum diameter D2 of the shaft on which is mounted one of the elements. In the example illustrated in FIG. 10, D1 is of the order of 0.4 mm, D2 is of the order of 0.5 mm, and Dmax is of the order of 0.7 mm. Thus, Dmax is less than about 2 times the diameter D1, and Dmax is less than about 1.6 times the diameter D2. In this way, the largest diameter Dmax of the tree is also greatly minimized.
    A third variant of the third embodiment differs from the first two variants in that the value of the maximum diameter D2 of the shaft on which is mounted an element of the oscillator is equal to that of the minimum diameter D1 on which is mounted an element of the oscillator. This variant is described below with reference to FIG. 11. Elements identical or having the same function as the elements of the first variant of the first embodiment have a "7" at the first digit (tens or hundreds) instead of "1" and have the same second digit (units or tens ). As in the second variant of the third embodiment, the balance 74 is integral with the shaft 73 via the plate 75. The latter is attached, for example by driving, on a portion 735 and the shaft 73 on a height H1. The diameter of this portion 735 is equal to the minimum diameter D1 of the shaft on which is mounted an element of the oscillator. The diameter of this portion 735 also corresponds to the maximum diameter D2 of the shaft on which is mounted an element of the oscillator. The balance is mounted in abutment on the plate, for example by driving. To do this, the hub of the balance beam 74 has a total height H2 sufficient, in particular equal to or substantially equal to the height of the portion 754 of the plate 75, so as to ensure a sitting and a holding torque of the balance. The shell is, as for it, fixed on a portion 736 of the shaft 73, for example by driving. The diameter of this portion 736 corresponds to the maximum diameter D2 of the shaft on which is mounted an element of the oscillator, and also corresponds to the minimum diameter D1 of the shaft on which is mounted an element of the oscillator. Thus, D1 = D2. In this third variant, a shaft portion 733 has a diameter Dmax greater than the diameters D1 and D2. Thus, this portion has shoulders against which the plate and / or the ferrule are likely to bear when they are fixed on the shaft. In this way, the position of the balance and that of the ferrule can be precisely defined. In this third variant, Dmax> D1 = D2, and the maximum diameter Dmax of the shaft is less than 3.5, or 2.5 or even twice the minimum diameter D1 of the shaft on which is mounted one of the elements and the maximum diameter Dmax of the shaft is less than 2, 1.8 or 1.6, even 1.3 times the maximum diameter D2 of the shaft on which is mounted one of the elements. In the example illustrated in FIG. 11, D1 and D2 are of the order of 0.4 mm, and Dmax is of the order of 0.7 mm. Thus, Dmax is less than about 2 times the diameter D1, and Dmax is less than about 2 times the diameter D2. In this way, the largest diameter Dmax of the tree is also greatly minimized.
    In the third embodiment, Dmax is preferably the diameter of a seat in contact with which we can chase an element or two elements (plate, balance, ferrule) on the axis.
    Whatever the embodiment, when a first element, for example the balance, is not mounted directly on the shaft but is mounted on a second element, itself mounted directly on the shaft at level of a first portion of the shaft having a first diameter, it is considered that the diameter of the shaft on which is mounted the first member is the first diameter. Of course, whatever the embodiment considered, all the elements chosen from the group ferrule, plateau, balance are likely to be arranged on one of three diameters D1, D2, Dmax.
    In the various embodiments, the diameter Dmax is preferably less than 1.1 mm, or even less than 1 mm, or even less than 0.9 mm.
    The oscillator according to the invention provided with a paramagnetic spiral (alloy Nb-Zr-O, Parachrom <®> for example) or diamagnetic (in particular silicon coated with a SiO2 layer) has the specificity of be equipped with a balance shaft made of free-cutting steel whose geometry has been modified to minimize the residual effect. The plate and the balance are, for their part, machined in a paramagnetic or diamagnetic material, for example a cuprous alloy such as CuBe2 or brass, silicon or nickel-phosphorus. The tray, according to the embodiment considered, is preferably adapted to allow the assembly of the balance.
    In this document, "a first element integral with a second element" means that the first element is attached to the second element.
    In this document, "assembled balance" means an assembly comprising or consisting of a balance shaft, a balance, a plate and a shell, the balance, the plate and the ferrule being mounted on the axis balance.
    In this document, "axis" and "tree" refer to the same element.
    In this document, the reports of the values of the residual markets are given in absolute value.
    The graphics of FIGS. 1, 13 and 14 are made to scale, so that values, including residual run values, can be deduced from them by measurement on the graph.
    权利要求:
    Claims (12)
    [1]
    An oscillator (10; 20; 30; 40; 50; 60; 70) comprising a spiral (11; 21; 31; 41; 51; 61; 71) of paramagnetic or diamagnetic material and an assembled rocker (12; 22; 32; 42; 52; 62; 72) comprising a shaft (13; 23; 33; 43; 53; 63; 73) on which are mounted the following elements: a rocker (14; 24; 34; 44; 54; 64 74), a plate (15; 25; 35; 45; 55; 65; 75) and a ferrule (16; 26; 36; 46; 56; 66; 76) integral with said spring (11; 21; 31; ; 51; 61; 71), characterized in that the maximum diameter (Dmax) of the shaft is less than 3.5, or even 2.5 or even twice the minimum diameter (D1) of the shaft on which one is mounted. elements or in that the maximum diameter (Dmax) of the shaft is less than 1.6, or even 1.3 times the maximum diameter (D2) of the shaft on which is mounted one of the elements.
    [2]
    2. Oscillator (10; 20; 30; 40; 50; 60; 70) comprising a spiral (11; 21; 31; 41; 51; 61; 71) of paramagnetic or diamagnetic material and an assembled rocker (12; 22; 32; 42; 52; 62; 72) comprising a shaft (13; 23; 33; 43; 53; 63; 73) on which are mounted the following elements: a rocker (14; 24; 34; 44; 54; 64 74), a plate (15; 25; 35; 45; 55; 65; 75) and a ferrule (16; 26; 36; 46; 56; 66; 76) integral with said spring (11; 21; 31; ; 51; 61; 71), characterized in that the maximum diameter (Dmax) of the shaft is less than 3.5, or even 2.5 or even twice the minimum diameter (D1) of the shaft on which one is mounted. elements and in that the maximum diameter (Dmax) of the shaft is less than 2, even 1.8, even 1.6, or even 1.3 times the maximum diameter (D2) of the shaft on which is mounted one of the elements.
    [3]
    3. Oscillator according to one of the preceding claims, characterized in that the balance shaft is made of steel, especially free-cutting steel.
    [4]
    4. Oscillator according to one of the preceding claims, characterized in that the maximum diameter (D2) of the shaft on which is mounted one of the elements is equal to the maximum diameter (Dmax) of the shaft.
    [5]
    5. Oscillator according to one of the preceding claims, characterized in that the maximum diameter (D2) of the shaft on which is mounted one of the elements and the minimum diameter (D1) of the shaft on which is mounted l one of the elements and the maximum diameter (Dmax) of the shaft are equal.
    [6]
    6. Oscillator according to one of the preceding claims, characterized in that the maximum diameter (Dmax) of the shaft is less than 1.1 mm, or even less than 1 mm, or even less than 0.9 mm.
    [7]
    7. Oscillator according to one of the preceding claims, characterized in that the balance is mounted directly on the shaft.
    [8]
    8. Oscillator according to one of claims 1 to 6, characterized in that the rocker is mounted on the plate.
    [9]
    9. Oscillator according to one of the preceding claims, characterized in that the ferrule is mounted on the plate.
    [10]
    10. Oscillator according to one of the preceding claims, characterized in that the balance shaft is cylindrical or substantially cylindrical.
    [11]
    11. Watch movement comprising an oscillator (10; 20; 30; 40; 50; 60; 70) according to one of the preceding claims.
    [12]
    12. Timepiece comprising a watch movement according to claim 11 or an oscillator (10; 20; 30; 40; 50; 60; 70) according to one of claims 1 to 10.
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    法律状态:
    2015-09-30| PK| Correction|Free format text: RECTIFICATION INVENTEUR |
    2016-12-15| PFA| Name/firm changed|Owner name: ROLEX S.A., CH Free format text: FORMER OWNER: ROLEX S.A., CH |
    优先权:
    申请号 | 申请日 | 专利标题
    EP11405342|2011-10-24|
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