• 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 flywheel (12) and at least one elastic member (18, 20) connected, on the one hand, to one or more portions of the flywheel. (12) and, on the other hand, to a support (30). The flywheel (12) is connected to the support (30) by said at least elastic member (18, 20) so as to be able to oscillate around the support (30) while said support is stationary. The invention also relates to a method of manufacturing such an oscillator, as well as to the watch movement.
    公开号:CH716321A2
    申请号:CH00674/20
    申请日:2020-06-05
    公开日:2020-12-15
    发明作者:Gygax Pierre
    申请人:Stephane Von Gunten；
    IPC主号:
    专利说明:

    Technical area
    The present invention relates to an oscillator for a watch movement which has the particularity of having no balance axis and bearings.
    State of the art
    [0002] Traditionally, oscillators for a horological movement comprise a flywheel, called a balance, comprising a rim and a means which are connected by arms. The hub of the balance is driven on a balance shaft which serves as a central support for the balance. The pivots of the balance axis are mounted in bearings allowing the assembly to pivot under the action of a hairspring and maintained by an escape mechanism. In general, the internal coil of the hairspring is fixed to the balance axis by a ferrule while a stud fixes the outside of the hairspring directly to the cock or by means of a movable stud holder.
    [0003] Numerous devices are known for maintaining the pivots of the balance axis of a watch movement, the most common comprising a pierced stone forming a pad, the hole of which allows the passage of this pivot, and a counter stone. pivot limiting the axial movement of the pivot. This arrangement makes it possible to obtain fairly low friction coefficients, on condition that the bearing is lubricated, for example with oil. It is also known to equip these bearings with elastic shock absorbers variously shaped, to allow the stones to move momentarily during an impact, and thus to prevent the breaking of the very fragile pivots.
    [0004] The oils used for lubrication do not have an indefinite duration. They thicken and degrade after a certain time, requiring periodic revisions of the watch. Moreover, these bearings always, even new, have a certain friction due to the viscosity of the oil.
    [0005] An aim of the present invention is therefore to provide an oscillator overcoming the aforementioned disadvantages, in particular a robust and reliable oscillator.
    [0006] Another object of the invention is to provide a compact oscillator.
    Another object of the present invention is to provide an oscillator having an original visual appearance.
    Brief summary of the invention
    [0008] These aims are achieved by means of an oscillator for a watch movement, comprising a flywheel and at least one elastic member connected, on the one hand, to one or more portions of the flywheel and, on the other hand , to a support. The flywheel is connected to the support by said at least elastic member so as to be able to oscillate around the support while said support is stationary.
    [0009] According to one embodiment, said at least one elastic member is in the form of at least one hairspring. The outer end of said at least one hairspring is connected to a portion of the flywheel while the inner end of said at least one hairspring is connected to the support.
    [0010] According to one embodiment, the flywheel is connected to the support by a first and a second superimposed hairspring.
    [0011] According to one embodiment, the first and second balance springs are wound in the opposite direction relative to each other.
    According to one embodiment, the outer end of the hairspring or of each hairspring comprises a connecting member integral with the flywheel and forming a single piece with the corresponding hairspring.
    [0013] According to one embodiment, the connecting member of each hairspring is of annular shape and is fixed respectively against two opposite faces of the flywheel.
    According to one embodiment, the flywheel comprises a radial extension extending in the direction of the axis of oscillation of the flywheel and comprising an actuator configured to cooperate with an anchor exhaust system or with another exhaust system to maintain oscillator oscillations
    [0015] According to one embodiment, the radial extension is arranged along one of the sides of said at least one hairspring, preferably along an axis perpendicular to the axis of oscillation of the flywheel.
    [0016] According to one embodiment, the actuating member is arranged along an axis parallel to the axis of oscillation of the flywheel.
    Another aspect of the invention relates to a watch movement comprising a support in the form of a tenon integral with a plate of the watch movement or integral with a rooster mounted on the plate of the movement. The inner end of the hairspring or of each hairspring of the oscillator as described above is fixed to the tenon.
    Another aspect of the invention relates to a timepiece comprising the horological movement as described above.
    Another aspect of the invention relates to a method of manufacturing the oscillator as described above, comprisingproduce the or each balance spring of the oscillator by an additive manufacturing process, of the UV-LIGA type, or by a subtractive process, for example of the DRIE (Deep Reactive Ion Etching) type or by laser cutting, the internal end of each hairspring being shaped to be fixed to the support, the outer end of each hairspring being shaped so as to create a connecting member with the flywheel,fix the connecting member of the or each balance-spring to the flywheel, andfix the inner end of the or each hairspring to the support.
    [0020] According to one embodiment, the connecting member of each balance spring has an annular shape fixed against two opposite faces of the flywheel.
    Brief description of the figures
    Examples of implementation of the invention are indicated in the description illustrated by the appended figures in which:Figure 1 shows a schematic sectional view of the oscillator mounted on a rooster according to one embodiment of the invention,FIG. 2 represents a partial schematic view of the oscillator mounted on the plate of a watch movement according to another embodiment, andFigure 3 is a schematic view of the inner coil of a hairspring comprising a fixing member and of the outer coil of the hairspring comprising a connecting member to the flywheel, the fixing and connecting members forming a part with the hairspring unique according to one embodiment of the invention.
    Examples of embodiment of the invention
    According to one embodiment illustrated in Figure 1, the oscillator 10 comprises a tenon 30, a flywheel 12 of annular shape as well as a first and a second hairspring 18, 20 superimposed and arranged to connect the flywheel 12 to the tenon 30. The tenon 30 comprises a body 32 which can be fixed to the cock 50 of a clockwork movement or, according to an alternative embodiment, directly to the plate 40 of the clockwork movement (Figure 2). Unlike a traditional oscillator, of the spiral balance type, the tenon 30 is fixed relative to the cock 50 or to the plate 40 and the flywheel 12 is arranged to oscillate around the tenon 30.
    This particular arrangement is therefore devoid of a balance shaft mounted to pivot relative to the plate of the movement according to conventional oscillators, which has several advantages. In particular, the absence of bearings makes it possible to solve the friction and lubrication problems which require periodic revisions of the watch. Furthermore, the tenon, by virtue of its shape, has good mechanical stability and eliminates the need for shock-absorbing systems. The absence of bearings and of an anti-shock system makes it possible to reduce the size of the oscillator compared to conventional oscillators. As an option, the radial and axial travel of the oscillator, which would be induced by a shock, could be limited by making limit stops located at the periphery of the flywheel 12.
    The first and second balance springs 18, 20 superimposed form a structure connecting the flywheel 12 to the pin 30 which has the necessary rigidity to allow the flywheel to oscillate in a plane perpendicular to the longitudinal axis of the tenon 30. The first and second spirals 18, 20 are wound in the opposite direction relative to each other and can be connected to the tenon 30 and to the flywheel 12 of the oscillator 10 by various means as described. lower.
    According to Figure 1, a radial extension 14 is integral with the flywheel 12 and extends in a plane parallel to the plane in which the flywheel 12 is arranged to oscillate. An actuator 16 is integral with the radial extension 14 of the flywheel 12 and extends in a direction parallel to the longitudinal axis of the tenon 30 at the distal end of the radial extension 14. The actuator 16 may for example comprise a portion the shape of which is similar to the shape of a plate pin in order to be able to cooperate with an escape anchor.
    The respective ends of the first and second spirals 18, 20 can be connected to the post 30 and to the flywheel 12 in different ways. According to an advantageous embodiment and with reference to Figure 3, the outer end 18b, 20b of the first and the second hairspring 18, 20 comprises a connecting member 22b, 24b of annular shape while the inner end 18a, 20a comprises a fixing member 22a, 24a of cylindrical shape and comprising in its center a through hole of non-cylindrical shape, preferably square or rectangular.
    The connecting and fixing members of each hairspring form a single part with the hairspring. This part is obtained for example by an additive manufacturing process of the UV-LIGA type or by a subtractive manufacturing process, for example of the DRIE (Deep Reactive Ion Etching) type. The annular connecting member 22b, 24b of each balance spring 18, 20 are fixed respectively against two opposite faces of the flywheel 12.
    According to Figure 2, the tenon 30 comprises a body 32 integral with the plate 40 or the cock 50 (Figure 1). The free end of the body 32 comprises a rod 38 of non-circular cross section, preferably square or rectangular. The rod 38 is part of a cylindrical virtual volume whose diameter is less than the diameter of the body 32 of the tenon. The fixing member 22a, 24a of the first and of the second hairspring 18, 20 are arranged around the rod 38 on either side of a separator 36. An internal thread is formed along the axis of the rod for receive the threaded part 39b of a screw 39 whose screw head 39a bears against the fixing member 24a of the hairspring 20 superimposed on the hairspring 18.
    Other means of fixing each hairspring 18, 20 to the pin 30 and to the flywheel 12 can be considered. For example, the internal end 18a, 20a of each hairspring 18,20 can be fixed to the post 30 in a conventional manner by means of a ferrule driven on a cylindrical rod located at the free end of the body 32 of the post. . The outer ends 18b, 20b of the first and of the second hairspring 18, 20 may, for their part, be connected respectively to a first and a second portion of the flywheel 12 located on its inner periphery and which are diametrically opposed as illustrated in Figure 1.
    The fixing of the outer end 18b, 20b can be done in different ways, for example by means of a stud connected to the outer end of each hairspring 18, 20 and mounted in an integral stud holder flywheel 12.
    Although the oscillator 10, according to the embodiment which has just been described, comprises two superimposed balance springs, the oscillator 10 may only comprise a balance spring according to an alternative embodiment. In this case, the dimensions of the hairspring must be calculated to provide the hairspring with the rigidity necessary to allow the flywheel to oscillate in a plane perpendicular to the longitudinal axis of the tenon 30. Furthermore, the or each hairspring may be replaced by any other elastic member whose shape is adapted to provide the necessary Z-shaped rigidity to the elastic member so that the flywheel can oscillate in a plane substantially perpendicular to the longitudinal axis of the tenon.
    Reference list
    [0032]<tb> Oscillator 10<tb> <SEP> flywheel 12<tb><SEP> <SEP> Radial extension 14<tb><SEP><SEP> <SEP> Actuator 16<tb> <SEP> First hairspring 18<tb><SEP> <SEP> Inner end 18a<tb><SEP><SEP> <SEP> Fixing device 22a<tb><SEP> <SEP> External end 18b<tb><SEP><SEP> <SEP> Liaison body 22b<tb> <SEP> Second hairspring 20<tb><SEP> <SEP> Inner end 20a<tb><SEP><SEP> <SEP> Fixing device 24a<tb><SEP> <SEP> External end 20b<tb><SEP><SEP> <SEP> Liaison body 24b<tb> Support 30<tb> <SEP> Tenon<tb><SEP> <SEP> Corp 32<tb><SEP> <SEP> Hitch portion 34<tb><SEP><SEP> <SEP> Separator 36<tb><SEP><SEP> <SEP> Stem 38<tb><SEP><SEP> <SEP> Screw 39<tb><SEP><SEP><SEP> <SEP> Screw head 39a<tb><SEP><SEP><SEP> <SEP> Threaded part 39b<tb> Platinum 40<tb> Rooster 50
    权利要求:
    Claims (13)
    [1]
    1. Oscillator (10) for a watch movement, comprising a flywheel (12) and at least one elastic member (18, 20) connected, on the one hand, to one or more portions (12a, 12b) of the flywheel d 'inertia (12) and, on the other hand, to a support (30), characterized in that the flywheel (12) is connected to the support (30) by said at least elastic member (18, 20) of so as to be able to oscillate around the support (30) while said support is stationary.
    [2]
    2. Oscillator (10) according to the preceding claim, characterized in that said at least one elastic member is in the form of at least one hairspring (18, 20), the outer end (18b, 20b) of said at least one hairspring (18, 20) being connected to a portion (12a, 12b) of the flywheel (12), the inner end (18a, 20a) of said at least one hairspring (18, 20) being connected to the support (30 ).
    [3]
    3. Oscillator (10) according to the preceding claim, characterized in that the flywheel (12) is connected to the support (30) by a first and a second hairspring (18, 20) superimposed.
    [4]
    4. Oscillator (10) according to the preceding claim, characterized in that the first and second balance springs (18, 20) are wound in the opposite direction relative to each other.
    [5]
    5. Oscillator (10) according to one of claims 2 to 4, characterized in that the outer end (18b, 20b) of the hairspring or of each hairspring (18, 20) comprises a connecting member (22b, 22b) integral with the flywheel (12), the connecting member forming a single piece with the balance spring.
    [6]
    6. Oscillator (10) according to the preceding claim, characterized in that the connecting member (22b, 22b) of each hairspring (18, 20) is of annular shape and is fixed respectively against two opposite faces of the flywheel. (12).
    [7]
    7. Oscillator (10) according to one of claims 2 to 6, characterized in that the flywheel (12) has a radial extension (14) extending in the direction of the axis of oscillation of the flywheel. of inertia (12) and comprising an actuating member (16) configured to cooperate with an escape anchor or other escape mechanism making it possible to maintain the oscillations of the oscillator (10).
    [8]
    8. Oscillator (10) according to the preceding claim, characterized in that the radial extension (14) is arranged along one of the sides of said at least one hairspring (18, 10), preferably along an axis perpendicular to the axis of oscillation of the flywheel.
    [9]
    9. Oscillator (10) according to claim 7 or 8, characterized in that the actuator (16) is arranged along an axis parallel to the axis of oscillation of the flywheel (12) .
    [10]
    10. Watch movement comprising a support in the form of a tenon (30) integral with the plate (40) of the movement or integral with a cock (50), characterized in that the internal end (18a, 20a) of the hairspring or of each hairspring (18, 20) of the oscillator (10) according to one of claims 2 to 9 is fixed to the tenon (30).
    [11]
    11. Timepiece comprising the watch movement according to the preceding claim.
    [12]
    12. Method of manufacturing the oscillator according to one of claims 2 to 9, comprising- making the or each balance spring (18, 20) of the oscillator by an additive manufacturing process of the UV-LIGA type or by a subtractive manufacturing process, for example the DRIE (Deep Reactive Ion Etching) process or by laser cutting, the inner end of each hairspring being shaped to be fixed to the support (30), the outer end of each hairspring being shaped so as to create a connecting member with the flywheel,- fix the connecting member of the or each balance spring (18, 20) on the flywheel (12), and- fix the internal end of the or each hairspring (18, 20) on the support (30).
    [13]
    13. Manufacturing method according to the preceding claim, wherein the connecting member of each hairspring (18, 20) to an annular shape fixed against two opposite faces of the flywheel.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH7872019|2019-06-11|
    CH11232019|2019-09-05|
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