• 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 present invention relates to a balance wheel for mechanical clockwork, comprising a hub (13) for fixing the balance to an axis (15) and a bearing structure integral with the hub (13) and connecting the hub (13) to at least one mass element (11), in which the at least one mass element (11) is connected to the supporting structure by a clip-type connection. In addition, the present invention also relates to an oscillator comprising such a balance and a spring, and to a mechanical clockwork comprising such an oscillator.
    公开号:CH713286A1
    申请号:CH01731/16
    申请日:2016-12-23
    公开日:2018-06-29
    发明作者:Von Gunten Stéphane
    申请人:Mft Et Fabrique De Montres Et Chronometres Ulysse Nardin Le Locle S A；
    IPC主号:
    专利说明:

    Description
    TECHNICAL FIELD OF THE INVENTION [0001] The present invention relates to the technical field of watchmaking, in particular mechanical watchmaking. More specifically, the present invention relates to the technical field of regulating members for mechanical watch movements, including balance springs.
    STATE OF THE ART [0002] In a mechanical watch movement, a regulating member (or regulator) is used in order to regulate the speed of the watch wheel. In general, the regulating member in a mechanical watch is constituted by the sprung-balance assembly. The pendulum is a moving part that can oscillate on its axis of rotation thanks to the return force of a spiral-shaped spring, attached to the balance, which prints the oscillating movement back and forth. A "conventional" rocker consists of a hub that connects the balance to an axis and a serge which is connected to the hub by at least two arms.
    [0003] One of the most important properties of a pendulum, particularly as regards its chronometric properties, is its moment of inertia. Indeed, the oscillation properties of the sprung-balance assembly depend, among other things, strongly on the moment of inertia of the balance. In a very simplified way, it can be said that the increase of the moment of inertia of the balance positively influences the isochronism and therefore the precision of the movement. It has been tried for many years to maximize the moment of inertia of the pendulums.
    [0004] Documents CH 698125, CH 710674 or EP 1 973013 show rockers whose serge is not continuous, as in conventional rockers, but composed of several segments. Each of these segments is connected to the hub by an arm. In order to optimize the moment of inertia by concentrating the mass of the balance on the side of the segments, the arms of the pendulums proposed in these documents are made of "light" materials and / or have particular shapes (eg with recesses, or with particular profiles). Also, serge segments have specific shapes that help improve the aerodynamic properties of the proposed pendulums and further optimize their oscillatory behavior.
    Even if the solutions proposed in these documents help improve the performance of the balance springs compared to conventional balance springs, there is still the need and the desire to achieve an even greater optimization. SUMMARY OF THE INVENTION [0006] Therefore, the object of the present invention is to make it possible to produce balances used in mechanical watch movements having an optimized and adjustable oscillatory behavior.
    This object is achieved in particular by a pendulum for mechanical clockwork according to independent claim 1. The more specific aspects of the present invention are described in the dependent claims and in the description.
    More specifically, this object is achieved with the aid of a pendulum for a mechanical clockwork movement, comprising a hub for fixing the balance to an axis and a bearing structure integral with the hub and connecting the hub to at least one mass element. According to the present invention, the at least one mass element is connected to the supporting structure by a clip-type connection.
    With such a structure, the mass elements can be attached to the bearing structure of the beam in a simple manner, without the need for glue, screws or other additional fastening means. Similarly, such a clip-type connection between the supporting structure and the mass elements not only allows assembly, but also simple disassembly of the mass elements. Therefore, an exchange of the mass elements on already assembled balances is easily possible, which offers the possibility of adjusting the moment of inertia of the balance according to the specific needs. For example, the mass elements of a first material can easily be replaced by the mass elements into a second material, eg lighter, to reduce the moment of inertia. Also, the mass elements of different shapes or dimensions can be used with the same carrier structure to obtain rockers with very different properties. This creates a very important flexibility in the design and production of balances and simplifies the management of stock significantly.
    Preferably, the carrier structure is made of a low density material, in particular monocrystalline silicon, polycrystalline silicon or polysilicon. Of course, other materials with similar properties can also be used, especially light metals such as aluminum. Similarly, the at least one mass element may preferably be made of a high density material, in particular gold, platinum or an alloy of these materials. A supporting structure made of a low density material, in combination with the mass elements in a high density material, makes it possible to maximize the moment of inertia of the balance and to make the oscillator in which such a pendulum is integrated less sensitive to vibrations. external disturbances.
    According to one embodiment of the present invention, the carrier structure comprises at least two arms arranged symmetrically with respect to the hub, a ground member being connected to the end of each arm opposite the hub. Such an arrangement of the elements of the balance provides a structure of the balance according to this embodiment of the present invention which is similar to the structure of a conventional balance.
    According to another embodiment of the present invention, the carrier structure further comprises at least one support element, the support element supporting at least one stabilizing element. The stabilizing members may have different shapes and orientations, eg the form of fins at the ends of the support members extending between the ground members. These support elements may also have an arcuate shape, making in this manner appear a form of balance similar to the shape of conventional balances. Also, the stabilizing elements can be made of the same material as the carrier structure, which simplifies the manufacture of the balance. These stabilizing elements make it possible to stabilize the amplitude of oscillation of the balance.
    Significantly, the at least one stabilizing element may comprise at least one weight made of a material different from the material of the stabilizing element. More particularly, this weight can be made of the same material as the at least one mass element. Such a weight added to the stabilizing element makes it possible to fine-adjust the mass distribution between the bearing structure, the mass elements and the stabilizing elements, in order to be able to fine-adjust the oscillatory properties of the balance according to this embodiment of the present invention.
    At this point, it is important to mention that the present invention also relates to an oscillator comprising a rocker according to the present invention, and a spring. Similarly, the present invention also relates to a mechanical clockwork comprising an oscillator according to the present invention.
    BRIEF DESCRIPTION OF THE DRAWINGS [0015] Other features and advantages of the present invention will now be described in detail in the following description which is given with reference to the appended figures, which represent: FIG. 1A: a top view of a sprung-balance assembly with a balance according to a first embodiment of the present invention; Fig. 1 B: a perspective view of the sprung balance assembly of FIG. 1A; Fig. 1C: a sectional view of the sprung balance assembly of FIGS. 1A and 1B; Fig. 1D: an enlarged top view of a portion of the sprung balance assembly of FIGS. 1A, 1B and 1C; Fig. 2A: a top view of a sprung balance assembly with a balance according to a second embodiment of the present invention; Fig. 2B: a perspective view of the sprung balance assembly of FIG. 2A; Fig. 3A: a top view of a sprung-balance assembly with a balance according to a third embodiment of the present invention; Fig. 3B: a perspective view of the sprung balance assembly of FIG. 3A; Fig. 4A: a top view of a sprung-balance assembly with a balance according to a fourth embodiment of the present invention; Fig. 4B: a perspective view of the sprung balance assembly of FIG. 4A; Fig. 5A: a top view of a sprung-balance assembly with a balance according to a fifth embodiment of the present invention; and fig. 5B: a perspective view of the sprung balance assembly of FIG. 5A.
    DETAILED DESCRIPTION OF THE INVENTION [0016] Referring to the drawings, some non-limiting embodiments of a pendulum according to the present invention are now explained in more detail.
    Figs. 1A, 1B and 1C illustrate a sprung-balance assembly with a rocker 10 according to a first embodiment of the present invention, in top views, in perspective and in section, respectively. Like conventional balance springs, the sprung balance assembly of FIGS. 1A, 1B and 1C comprises, in addition to the rocker 10, a spring 14 in the form of a spiral, connected on one side to the rocker via an element called "ferrule" 76 and on the other hand to the fixed bridge of the plate via the element called "piton" 77, visible in FIG. 1B. The sprung balance assembly 10 in FIGS. 1A, 1B and 1C constitutes an oscillator that can be used in a mechanical clockwork movement, in the same way as conventional balance-springs.
    As visible in FIGS. 1 A, 1B and 1C, the rocker 10 comprises a hub 13 in the center for fixing the rocker 10 to an axis 15, and a bearing structure 12,12 ', 12 "which is integral with the hub 13. Of course, this conventional mobile configuration with a rod-shaped axis can also be adapted to create a rocker in which the axis and the spring are formed by a flexible guide (eg as described in document EP 2 273 323) .
    The support structure 12,12 ', 12 "connects the hub 13 to a plurality of mass elements 11. The shape of the mass elements 11 illustrated in FIGS. 1A and 1B is of an anchor, but it is however absolutely possible. to produce the mass elements 11 having other shapes, as required An enlarged view of a ground element 11 is shown in Fig. 1D The ground elements 11 can also, as shown in Fig. 1 B, be used to indicate the producer or any other useful registration.
    As for the bearing structure of the beam shown in Figs. 1A and 1B, it is composed of elements 12, 12 'which extend in essence radially from the hub 13, as well as circular elements 12' which connect the elements extending radially 12, 12 " between them. Of course, this structure is only an alternative embodiment of the carrier structure and other possible variants are shown in FIGS. 2A to 5B, discussed later.
    In the carrier structure shown in FIGS. 1A and 1B, two types of elements extending radially from the hub 13 can be identified: the four wider elements (or arms) 12 which directly connect the hub 13 to the mass elements 11, as well as a multitude finer elements that are located between the four arms 12. Again, the structure shown is only a variant and it would be quite possible to provide a different number of arms 12 (eg two, three or more than four) and / or fine elements 12 '. Also, the number and position of circular elements 12 "may vary from the version shown in Figs. 1A and 1B, as needed.
    According to the present invention, the mass elements 11 are made of a high density material, eg gold, platinum or an alloy of these materials. On the other hand, the carrier structure 12, 12 ', 12 "is made of a low density material, eg monocrystalline silicon, polycrystalline silicon or polysilicon, of course other materials with similar properties are possible. Such a combination of materials makes it possible to increase the moment of inertia of the rocker 10 with a limited mass, because, for a mass of the given rocker 10, the inertia is maximized. energy of the oscillator in its totality and, therefore, the insensibility of the latter to external disturbances are thus increased, alternatively, for a given inertia, the mass of the balance 10 can be minimized, the moment due to the forces of dry friction and therefore, the external disturbances can thus be diminished.
    The mass elements 11 according to the present invention are connected to the carrier structure (thus the arms 12) by a clip-type connection. In general, a clip, sometimes also called "spring clip", is a fastening device which consists of two parts hinged around a spring to form a clip. In the context of this invention, the clip type fastening is carried out using the elements of the carrier structure 12 which, by their elastic properties, can exert a sufficiently strong force to hold the mass elements 13 in place. Clip-on fastening not only simplifies assembly by eliminating the need for additional glue, screws or other fasteners, but also provides considerable flexibility in pendulum design and production and simplifies management. of stock importantly.
    Spiral-balance assemblies with rockers 10 according to a second, a third, a fourth and a fifth embodiment of the present invention are illustrated in FIGS. 2A and 2B, 3A and 3B, 4A and 4B and 5A and 5B, in top and perspective views, respectively.
    With respect to the rocker 10 according to the first embodiment of the present invention, the rockers according to the second, third, fourth and fifth embodiments of the present invention differ essentially at the level of the carrier structure. More particularly, these various embodiments of the present invention have a smaller number of thin elements 22 ', 32', 42 ', 52' extending radially between the hub 13 and the periphery of the balance 10.
    In addition, the rockers according to the second, third, fourth and fifth embodiments of the present invention comprise a number of stabilizing elements 27, 37, 47, 57 which are supported by elements of support 22 ', 22 ", 32', 32", 42 ', 42 ", 52', 52" which form part of the carrier structure, respectively. These stabilizing elements 27, 37, 47, 57 make it possible to stabilize the amplitude of oscillation of the balance and their number and shape can be varied according to the needs and according to the choice of the number and the material of the mass elements 11.
    These stabilizing elements 27, 37, 47, 57 can be evenly distributed between the mass elements 11 (as illustrated in FIGS. 2A, 2B, 3A and 3B, but they can also be positioned closer to each other. of one of the two mass elements 11 between which they are positioned (as illustrated in Figures 4A, 4B, 5A and 5B) They can be made in one piece with the support members 22 ', 22 ", 32 ', 32 ", 42', 42", 52 ', 52 "(and thus with the supporting structure), but also made as separate pieces and fixed on the supporting elements 22', 22", 32 ', 32 " , 42 ', 42 ", 52', 52" by means of suitable fastening means As can be seen in Figures 5A and 5B, the stabilizing elements 57
    权利要求:
    Claims (10)
    [1]
    may also comprise weights 58 made of a material different from the material of the stabilizing elements 57 (which may be the same material as that used for the mass elements 11), in order to make it possible to adjust the inertia of the balance 10 more fine. Of course, the present invention with these different aspects is subject to many variations as to its implementation. Although several embodiments have been described, it is easy to understand that it is not conceivable to exhaustively identify all the possible modes. It is therefore of course conceivable to replace a means described by equivalent means or to combine different means described without departing from the scope of the present invention. claims
    1. Pendulum (10) for mechanical clockwork, comprising a hub (13) for fixing the rocker (10) to an axis (15) and a bearing structure (12, 22, 32, ...) integral with the hub (13) and connecting the hub (13) to at least one mass element (11), characterized in that the at least one mass element (11) is connected to the supporting structure (22, 32, .. .) by a clip-type connection.
    [2]
    2. Pendulum according to claim 1, characterized in that the carrier structure is made of a low density material, in particular monocrystalline silicon, polycrystalline silicon or polysilicon.
    [3]
    3. Pendulum according to claim 1 or 2, characterized in that the at least one mass element is made of a high density material, in particular gold, platinum or an alloy of these materials.
    [4]
    4. Pendulum according to one of claims 1 to 3, characterized in that the carrier structure comprises at least two arms (22, 32, ...) arranged symmetrically with respect to the hub (13), a mass element (11) being connected to the end of each arm (22, 32, ...) opposite the hub (13).
    [5]
    5. Pendulum according to one of claims 1 to 4, characterized in that the carrier structure further comprises at least one support member (22 ', 22 ", 32', 32", ...), l support member (22 ', 22 ", 32', 32", ...) supporting at least one stabilizing element (27, 37, ...).
    [6]
    6. Pendulum according to claim 5, characterized in that the at least one stabilizing element (27, 37, ...) is made of the same material as the carrier structure (22, 32, ...).
    [7]
    7. Pendulum according to claim 5 or 6, characterized in that the at least one stabilizing element (57) comprises at least one weight (58) made of a material different from the material of the stabilizing element (57).
    [8]
    8. Pendulum according to claim 7, characterized in that the weight (58) is made of the same material as the at least one mass element (11).
    [9]
    9. Oscillator comprising a balance according to one of the preceding claims and a spring (14).
    [10]
    Mechanical clockwork comprising an oscillator according to claim 9.
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    同族专利:
    公开号 | 公开日
    CH713286B1|2020-11-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP2410386A1|2010-07-19|2012-01-25|Nivarox-FAR S.A.|Balance wheel with inertia adjustment with insert|
    US20140241134A1|2013-02-25|2014-08-28|Seiko Instruments Inc.|Temperature compensation-type balance, timepiece movement, mechanical timepiece and manufacturing method of temperature compensation-type balance|
    EP2908184A1|2014-02-17|2015-08-19|The Swatch Group Research and Development Ltd.|Method for maintaining and adjusting a clock piece resonator|
    CH710017A2|2014-08-26|2016-02-29|Nivarox Sa|Inertia adjustable balance.|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH01731/16A|CH713286B1|2016-12-23|2016-12-23|Balance wheel for mechanical clockwork movement.|CH01731/16A| CH713286B1|2016-12-23|2016-12-23|Balance wheel for mechanical clockwork movement.|
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