• 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 annular oscillating mass (3) comprises a drive ring (5) and a heavy sector (7). The drive ring (5) comprises an annular transmission part (11) which has a coaxial toothing (15). The drive ring (5) further comprises a plurality of elastically deformable connecting elements (9) which connect the annular transmission part (11) to the heavy sector (7). According to the invention and in a self-winding clockwork movement, the coaxial toothing (15) meshes with a winding mobile. At least three rollers (19) cooperate with the annular transmission portion (11) of the drive ring (5).
    公开号:CH710387A2
    申请号:CH01769/14
    申请日:2014-11-14
    公开日:2016-05-31
    发明作者:Rochat Marco；Cordier Samuel
    申请人:Blancpain Sa；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    The present invention relates to an annular oscillating mass comprising a drive ring comprising an annular transmission portion provided with a toothing coaxial to the ring, and a heavy sector attached to the drive ring. The present invention also relates to a timepiece movement and a timepiece with automatic winding which respectively comprise the annular oscillating weight of the invention.
    PRIOR ART
    [0002] Automatic watches equipped with an annular oscillating mass are known. This oscillating mass is housed in a circular passage arranged around the movement inside the watch case. Rollers are also arranged along the passage to support and guide the oscillating mass, so that it is free to rotate inside the passage. The drive ring may for example have an internal toothing, thanks to which the rotational movements of the oscillating mass are mechanically transmitted to the barrel of the movement. The oscillating weight thus ensures the automatic winding of the mainspring.
    The function of the rollers is to guide the ring and limit friction as much as possible. For this purpose, they are preferably mounted on ball bearings. To provide a stable base for the oscillating weight, the rollers must be at least three in number. A known problem with the annular oscillating masses which correspond to the description above is related to the relative fragility of the rollers in view of the considerable inertia of the oscillating mass. Indeed, in the event of a shock exerted radially on the middle part of the timepiece, the considerable weight of the oscillating mass may for example lead to a break in the axis of the rollers, or alternatively cause the bearing to seize. balls. Moreover, in the event of impact on the bottom side or the dial side of the timepiece, the axial displacement of the oscillating mass may damage the gear wheel which meshes with the drive ring.
    In order to remedy at least partially the aforementioned problems, patent document CH 701 343 B1 proposes to mount each of the rollers on a damping member preferably constituted by a rocker biased by a spring. The function of the damping members is to allow damping any inadvertent movement of the oscillating mass in the radial direction following an impact. However, it will be understood that the solution proposed by the aforementioned patent document does not allow to dampen the movements of the oscillating mass in the axial direction.
    SUMMARY OF THE INVENTION
    An object of the present invention is to overcome the problems of the prior art which have just been exposed. It achieves this goal by providing an annular oscillating mass according to the appended claim 1.
    According to the invention, the annular transmission portion of the drive ring and the heavy sector are connected directly or indirectly to one another. In addition, the connection between the annular transmission portion and the heavy sector is performed via a plurality of elastically deformable connecting elements. It will therefore be understood that, in the event of an impact, the heavy sector has the possibility of deviating to a certain point of its normal trajectory without the annular transmission part being forced to do the same as the movement of the mass after the shock is radial or axial. The coaxial toothing is carried by the annular transmission portion and it will therefore be understood that the presence of deformable connecting elements allows to a certain extent to mechanically decouple the heavy sector of the coaxial toothing. In particular, when an impact causes a sudden acceleration of the heavy sector, the deformable connecting elements can dampen this acceleration, and thus prevent the gearing between the drive ring and the winding device are damaged.
    According to an advantageous embodiment of the invention, the elastically deformable connecting elements are constituted by flexible elastic rods. This feature allows the heavy sector to deviate from its normal path in all directions relative to the annular transmission portion. According to an advantageous variant of this embodiment, the longitudinal axes of the flexible rods preferably extend in the same plane parallel to the drive ring. An advantage of this feature is that the rods oppose the same biasing force to an axial bias from the bottom up as to an axial bias from top to bottom.
    According to an advantageous embodiment, the flexible rods have at least one fork. According to a first variant of this particular embodiment, the rods have the general shape of a Y with a single fork. According to a second variant, the rods fork in two places, on either side of the middle of the rod. In other words, according to the second variant, the rods comprise two opposite forks which give them the general shape of a double Y. In accordance with one or the other of the latter two variants, the fork portions of the rods are preferably also contained in the plane parallel to the drive ring in which extends the longitudinal axis. As will be seen in more detail below, the fact that the branches have forks contained in a plane parallel to the drive ring has the advantage of increasing the restoring force in the event of stress in the tangential direction at the end. 'ring.
    The invention also relates to a self-winding timepiece movement according to claim 10 of the patent as well as a self-winding timepiece according to claim 11 of the patent.
    BRIEF DESCRIPTION OF THE FIGURES
    Other features and advantages of the present invention will appear on reading the description which follows, given solely by way of non-limiting example, and with reference to the accompanying drawings in which:<tb> fig. 1 <SEP> is a perspective view from the bottom side of a timepiece showing an annular oscillating weight corresponding to a particular embodiment of the invention, and a winding mobile and three rollers arranged to cooperate with the oscillating mass;<tb> fig. 2 <SEP> is a sectional view along A-A of FIG. 1;<tb> fig. 3 <SEP> is a sectional view along B-B of FIG. 1;<tb> figs. 4A, 4B and 4C <SEP> illustrate three embodiments of elastically deformable connecting elements of annular oscillating masses according to the invention.
    DETAILED DESCRIPTION OF EMBODIMENTS
    FIG. 1 is a perspective view of an annular oscillating mass 3 corresponding to a first embodiment of the invention.
    The oscillating mass shown comprises a drive ring 5 and a heavy sector 7. According to the invention, the drive ring comprises a plurality of elastically deformable connecting elements 9 which extend between a part annular transmission 11 and a second annular portion 13. As shown in the figure, the heavy sector 7 is carried by and secured to the second annular portion, while the annular transmission portion has a concentric inner toothing 15.
    [0013] Referring again to FIG. 1, it can be seen that, in the illustrated embodiment, the elastically deformable connecting elements 9 have the shape of rods arranged parallel to the plane of the drive ring 5. These rods each have a fork giving them the shape of a Y having its upper part facing the second annular portion 13. It may be noted that in the illustrated embodiment, the rods have their longitudinal axis oriented radially and that the branches of the fork deviate from the longitudinal axis in a plane parallel to the drive ring and are integral with the second annular portion 13. The rods 9 are flexible so that they can deform in case of shock. Those skilled in the art will understand that the rods shown are arranged to allow the second annular portion 13 to deviate from its equilibrium position relative to the annular transmission portion 11 in the three directions (axial, radial and tangential).
    The oscillating mass 3 shown in FIG. 1 is part of a timepiece with automatic winding of which only a winding 17 and three rollers 19 are illustrated. As can be seen in fig. 1 and in the sectional view of FIG. 2, the winding mobile 17 comprises a gear which meshes with the internal toothing 15 of the drive ring 5. In a manner known per se, the function of the winding mobile is to transmit the rotational movements of the mass oscillating with the winding mechanism (not shown) so as to arm the mainspring.
    The rollers 19 are preferably equipped with ball bearings (not shown). The function of the rollers is to support and guide the oscillating mass, so that it is free to turn crazy around the circle passing through the three rollers. Referring more particularly to the sectional view of FIG. 3, it can be seen that the annular transmission portion 11 of the drive ring 5 has an annular groove 21. The groove 21 is arranged to cooperate with an equatorial bulge 23 that has the circumference of the rollers 19. It can be seen that see that the bulge 19 enters the groove 21. It will be understood that this arrangement ensures the axial positioning of the annular oscillating mass.
    As has already been said, according to the invention, the oscillating weight 3 of the present example is intended to dampen shocks. First of all, we know that when a small object like a watch receives a shock, it undergoes a sudden acceleration in the direction of the shock. In the case that concerns us, where the object in question is the timepiece of the present example, the sudden acceleration of the timepiece is transmitted to the oscillating weight that it contains by means of the rollers of As the inertia of the oscillating mass 3 is essentially located in the heavy sector 7, the latter exerts a considerable force of inertia on the rest of the oscillating mass. In the case where this inertial force is oriented in the radial direction (parallel to the plane of the drive ring 5 and towards the axis of rotation of the oscillating mass), it produces a displacement of the second part. annular 13 relative to the annular transmission portion 11 in the plane of the drive ring. It will be understood that, according to the invention, this displacement is made possible by the deformation of the connecting elements (in this example, the bending deformation of the rods 9 or their fork), and that this displacement contributes to damping the shock, and in particular to protect the ball bearings of the rollers 19.
    In the case where the inertial force exerted by the heavy sector 7 is oriented tangentially (in a direction tangent to the drive ring 5 and parallel to the plane of this ring), the inertia force tends to rotate sharply the second annular portion 13 of the drive ring 5. It will be understood that, according to the invention, this sudden movement can be damped by the deformation in flexion of the rods 9. The flexible rods allow to to avoid that the torque exerted by the internal toothing 15 on the mobile winding exceeds a permissible value. We can thus avoid any breakage of the automatic winding mechanism.
    We have seen that the rollers 19 are arranged to maintain the oscillating mass 3 not only radially, but also axially through the cooperation between the equatorial bulge 23 and the groove 21. The rollers therefore transmit also to the oscillating weight the acceleration due to an axial impact exerted on the bottom or dial side of the timepiece. In this case, the heavy sector exerts a considerable inertial force in the axial direction (perpendicular to the plane of the drive ring) on the rest of the oscillating mass. This force produces a displacement of the second annular portion 13 relative to the annular transmission portion 11. This displacement is oriented perpendicular to the plane of the drive ring 5. It will be understood that as before, this displacement is made possible by the flexion rods 9, and that this movement protects the rollers and the winding mobile by damping the shock suffered by the timepiece.
    Figs. 4A, 4B and 4C schematically illustrate three embodiments of elastically deformable connecting elements. The embodiment illustrated in FIG. 4A corresponds to that of the example just described. Figs. 4B and 4C illustrate two other embodiments in which the connecting elements are also constituted by flexible rods arranged to deform elastically. Referring now to FIG. 4B, it can be seen that the flexible rods shown (referenced 29) each comprise a middle, an inner end and an outer end. It can be seen that the flexible rods are divided in two on either side of the middle towards each of the ends. This characteristic gives the rods the shape of a double Y. Preferably, the two forks of the double Y are each included in a plane parallel to the drive ring 5. Finally, it can be seen that the flexible rods 39 of the embodiment of FIG. 4C have a longitudinal axis that is not oriented in the radial direction but that they form a non-zero angle with the radius in the center of the second annular portion 13 passing through the point of attachment of said radius.
    It will further be understood that various modifications and / or improvements obvious to a person skilled in the art can be made to the embodiments which are the subject of the present description without departing from the scope of the present invention defined by the appended claims. In particular, rather than being arranged around the annular transmission portion, alternatively, the second annular portion could be concentrically disposed within the annular transmission portion. On the other hand, the elastically deformable connecting elements are not necessarily constituted by flexible rods. Indeed, these connecting elements could alternatively be constituted by flip-flops (three or more) each associated with a spring.
    The drive ring of the invention may be formed from a material comprising silicon, that is to say, for example, monocrystalline silicon, polycrystalline silicon, doped monocrystalline silicon. , doped polycrystalline silicon, doped or non-doped silicon carbide, doped or non-doped silicon nitride, doped or non-doped silicon oxide such as quartz or silica. The anisotropic etching of such materials can be carried out wet or dry and typically by an anisotropic etching of the deep reactive ion etching type also known by the abbreviation D.R.I.E. from the words "Deep Reactive Ion Etching".
    Alternatively, the drive ring of the invention may be formed of precious metal or not, typically by the electroforming technique known by the abbreviation L.I.G.A. from the German terms "RöntgenLithographie, Galvanoformung & Abformung" and in which a mold is filled at one or more levels with the aid of a metal, for example, by electroplating. Of course, any type of electroforming, type L.I.G.A. or not, able to form a monoblock training ring at one or more levels is possible.
    权利要求:
    Claims (11)
    [1]
    1. Annular oscillating weight (3) for self-winding timepieces comprising a drive ring (5) comprising an annular transmission part (11) provided with a coaxial toothing (15) for driving the reassembly of the workpiece timepiece, and having a heavy sector (7) attached to the drive ring; characterized in that the drive ring (5) further comprises a plurality of resiliently deformable connecting elements (9), the heavy sector (7) being connected to the annular transmission part (11) via the connecting elements (9). link.
    [2]
    2. oscillating annular mass according to claim 1, wherein the deformable connecting elements (9) are constituted by flexible rods (9; 29; 39) arranged to deform elastically.
    [3]
    An oscillating annular mass according to claim 2, wherein the flexible rods (9; 29; 39) each have a longitudinal axis, the longitudinal axes extending in a plane coplanar with the drive ring (5).
    [4]
    4. annular oscillating mass according to claim 3, wherein the flexible rods (9) comprise a fork giving them substantially the shape of a Y, the fork being included in the coplanar plane to the drive ring (5).
    [5]
    5. Annular oscillating mass according to claim 3, wherein the flexible rods (29) each comprise a middle, an inner end and an outer end, the flexible rods being divided in two on each side of the middle towards each said ends, the flexible rods having substantially the shape of a double Y, the double Y having two opposite forks and each included in the coplanar plane to the drive ring (5).
    [6]
    6. oscillating annular mass according to one of claims 3, 4 and 5, wherein, in the absence of external stresses, the longitudinal axis of the flexible rods (9; 29) is oriented radially.
    [7]
    7. oscillating annular mass according to one of claims 3, 4 and 5, wherein the longitudinal axis of the flexible rods (39) non-radial.
    [8]
    8. oscillating annular mass according to one of claims 2 to 7, wherein the drive ring comprises a second annular portion (13) concentric to the annular transmission portion (11), the flexible rods (9; 29; 39) integral with the annular transmission portion (11) and the second annular portion (13), and the heavy sector (7) being attached to the second annular portion.
    [9]
    9. Annular oscillating mass according to claim 8, wherein, in the absence of external stresses, the second annular portion (13) extends concentrically around the annular transmission portion (11) and in the same plane as the portion annular transmission.
    [10]
    10. Self-winding watch movement comprising an oscillating weight (3) according to one of claims 1 to 9, and an automatic winding mechanism comprising a winding mobile (17) arranged to mesh with the coaxial toothing (15). , and at least three rollers (19) pivotally mounted on a fixed element of the timepiece, the rollers being arranged to cooperate with the annular transmission portion (11) of the drive ring (5). ) so that the oscillating mass (3) is free to rotate, suspended and guided by the rollers.
    [11]
    Timepiece with automatic winding, comprising a clockwork movement according to claim 10.
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    同族专利:
    公开号 | 公开日
    CH710387B1|2018-07-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2019-06-28| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    CH01769/14A|CH710387B1|2014-11-14|2014-11-14|An oscillating oscillating mass and a timepiece comprising such an oscillating mass.|CH01769/14A| CH710387B1|2014-11-14|2014-11-14|An oscillating oscillating mass and a timepiece comprising such an oscillating mass.|
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