• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a mobile brake assembly (1) for clockwork, comprising a shaft (2), comprising a first surface (3) cooperating in pivotal guiding with a second surface (4) of a wheel (5). pivotally mounted on said shaft (2), wherein said second surface (4) comprises at least one braking surface (11) that comprises a shoe (12) subjected to the action of a first elastic return means (13), monoblock with said wheel (5), and arranged to exert a radial force relative to said pivot axis (D) on said first surface (3). Said assembly (1) comprises intrinsic means of adjustment (14) by discrete values of the friction exerted by said braking surface (11) on said first surface (3). The invention also relates to a watch mechanism (100) and a timepiece (200) comprising at least one such assembly (1).
    公开号:CH709920A2
    申请号:CH01137/14
    申请日:2014-07-24
    公开日:2016-01-29
    发明作者:Raphaël Courvoisier
    申请人:Eta Sa Manufacture Horlogère Suisse；
    IPC主号:
    专利说明:

    Field of the invention
    The invention relates to a mobile watchmaking assembly, comprising a shaft having a first surface cooperating in pivotal guidance with a second surface of a wheel pivotally mounted on said shaft, wherein said first surface or respectively said second surface comprises at least one braking surface that comprises at least one shoe subjected to the action of at least one first elastic return means, integral with said shaft or said wheel respectively, and arranged to exert a radial force relative to said pivot axis on said second surface or respectively said first surface.
    The invention further relates to a clockwork mechanism comprising at least one such movable braking assembly.
    The invention also relates to a timepiece comprising at least one such movable braking assembly.
    The invention relates to the field of watch mechanisms, and more particularly the wheels.
    Background of the invention
    It is common, in watchmaking, to have to use non-tensioned wheels, especially when using boards or additional modules, for example for the display of a small second.
    It is then known to brake at least one wheel, for example by the support of a spring-blade pressing on the axis or on the wheel of one of the wheels of the wheel. Such braking certainly avoids the visual perception of the gear sets at the level of the user, but generates a significant friction and wear. Indeed, the braking force is not constant from one movement to another, which often requires to oversize the braking force.
    An alternative is a braking magnetic nature, which is not always desired in a watch movement.
    The use of flexible teeth is an elegant solution, the braking is then at the level of the teeth, but expensive.
    Summary of the invention
    The invention proposes to deal with the problem of angular play in a train, particularly an unstressed wheel, by using a friction.
    For this purpose, the invention relates to a mobile watchmaking assembly, comprising a shaft having a first surface cooperating in pivotal guiding with a second surface of a wheel pivotally mounted on said shaft, where said first surface or respectively said second surface comprises at least one braking surface that comprises at least a first arm subjected to the action of at least a first elastic return means, integral with said shaft or said wheel respectively, and arranged to exert a radial force with respect to said pivot axis on said second surface or respectively said first surface, characterized in that said movable braking assembly comprises intrinsic means of adjustment by discrete values of the friction exerted by said braking surface on said second surface; surface or respectively said first surface.
    According to one characteristic of the invention, said first surface or respectively said second surface comprises, distinct from each other, on the one hand at least one guide surface according to a predetermined clearance, about an axis. pivoting, said second surface or respectively said first surface, and secondly at least one said braking surface.
    The invention further relates to a clockwork mechanism comprising at least one such movable braking assembly.
    The invention also relates to a timepiece comprising at least one such movable braking assembly.
    Brief description of the drawings
    Other features and advantages of the invention will appear on reading the detailed description which follows, with reference to the accompanying drawings, in which:<tb> fig. 1 <SEP> shows, schematically and in section in a plane perpendicular to the pivot axis, a movable braking assembly according to a first embodiment of the invention, wherein it is composed of a shaft on which pivots a wheel which cooperates with it, firstly by a guide surface, and secondly by a braking surface exerting on the shaft a centripetal radial force, under the action of resilient biasing means exerting friction adjustable under the action of adjustment means by discrete values;<tb> fig. 2 <SEP> represents, similarly to FIG. 1, a variant of this first embodiment;<tb> fig. 3 <SEP> represents, similarly to FIG. 1, a second execution;<tb> fig. 4 <SEP> represents, similarly to FIG. 1, a third embodiment, with a plurality of curved arms substantially concentric with the shaft;<tb> fig. <SEP> represents, similarly to FIG. 1 but not in section, a fourth embodiment, with two arms extended on the wheel serge and pinching the shaft, each of these arms being subjected to a centripetal radiai thrust force exerted by second elastic return means incorporated in the wheel;<tb> fig. 6 <SEP> similarly to FIG. 5, a fifth embodiment, which further comprises, at the wheel, fixed guide surfaces of the shaft, independent of the braking surfaces;<tb> fig. 7 <SEP> represents, in the form of a block diagram, a timepiece comprising a mechanism which includes such a movable braking assembly.
    Detailed Description of the Preferred Embodiments
    The invention relates more particularly to the field of clockwork.
    The invention relates to a mobile brake assembly 1 clock, comprising a shaft 2 and a wheel 5 pivotally mounted on the shaft 2.
    The shaft 2 comprises a first surface 3 which cooperates in pivotal guiding with a second surface 4 of the wheel 5.
    The first surface 3 or respectively the second surface 4 comprises at least one braking surface 11 carried by at least a first braking arm 30 subjected to the action of at least a first elastic return means 13. This first resilient return means 13 is preferably integral with the shaft 2 or the wheel 5, and is arranged to exert a radial force relative to the pivot axis D on the second surface 4 or the first surface 3.
    The first elastic return means 13 is advantageously a flexible blade, more flexible than the shoe 12, which is mounted cantilever at a distal end of the blade, in the manner of a hammer head on its handle, the end of the flexible blade opposite the shoe being embedded in the corresponding structure, here the structure of the wheel 5 in the cases illustrated in FIGS. 1 to 4.
    According to the invention, this assembly 1 comprises intrinsic adjustment means 14 by discrete values of the friction exerted by the braking surface 11 on the second surface 4, or respectively the first surface 3.
    It is thus understood that the friction can theoretically be provided as well by a component of the wheel 5 pressing on a continuous surface of the shaft, as the opposite. The invention is more particularly illustrated in this configuration of a component of the wheel 5 exerting friction on a continuous surface of the shaft, because of the ease of embodiment, and also the interest that the use of a tree of small diameter and very simple geometry, which can then advantageously be made of a very hard material such as ruby, ceramic, carbide, high speed steel, or the like.
    According to a particular characteristic of the invention, as can be seen in FIGS. 1 to 4, the first surface 3 or respectively the second surface 4 comprises, distinct from each other, on the one hand at least one guide surface 10 according to a predetermined clearance J, about a pivot axis D , of the second surface 4 or respectively the first surface 3, and secondly at least one such braking surface 11, that comprises at least one shoe 12, at the distal end of a first arm 30, subjected to the action at least a first elastic return means 13. This first elastic return means 13 is preferably integral with the shaft 2 or the wheel 5, and is arranged to exert a radial force with respect to the axis of pivoting D on the second surface 4 or respectively the first surface 3.
    In the embodiments illustrated, in no way limiting, these intrinsic adjustment means 14 comprise at least one bearing surface 18, which is arranged to cooperate in thrust bearing with a complementary bearing surface 17 that includes the shoe 12 on the opposite side to the braking surface 11.
    Figs. 1 to 3 show in particular intrinsic adjustment means 14 which comprise at least one second flexible arm 19 carrying such a bearing surface 18.
    This second arm 19 is, or as in FIG. 3 limited radially with respect to the pivot axis D opposite it in abutment on an adjusting device 20 arranged to occupy one of a plurality of discrete positions relative to the shaft 2 (or respectively to wheel 5), or as in fig. 1 and 2 biased towards the complementary bearing surface 17 of the shoe 12 by a second elastic return means 16.
    Figs. 1 and 2 illustrate a movable braking assembly 1 where the second arm 19 is biased towards the complementary bearing surface 17 of the shoe 12 by the second elastic return means 16. This second arm 19 comprises at least one finger 15 ( or respectively a notch), subjected to the return action of the second elastic return means 16 and arranged to cooperate with only one at a time among a plurality of notches 23 that includes the shaft 2 or respectively the wheel 5, in the occurrence of the wheel 5 in the case of the figures, each said notch 23 corresponding to a different friction adjustment value. Figs. 1 and 2 show a series of notches 23 similar to a comb or a toothing, arranged to maintain the position of the finger 5 after its maneuver.
    The second elastic return means 16 is preferably a flexible blade, more flexible than the finger 15, which is mounted cantilever at a distal end of the blade, in the manner of a hammer head on its handle, the end of the flexible blade opposite the finger being embedded in the corresponding structure, here the structure of the wheel 5 in the cases illustrated by the figures.
    In an advantageous embodiment, the shoe 12 is subjected to both the action of at least a first elastic return means 13 and the action of the second resilient return means 16.
    The second resilient return means 16 may constitute a single limit stop for the shoe 12, the complementary bearing surface 17 then comes into simple support on the bearing surface 18 of the second arm 19, as shown in FIG. that visible in fig. 1: in this case, the second elastic return means 18 is used primarily for adjusting the friction, allowing the movement of the finger 15 and its cooperation with a notch 23 selected for a particular value of friction.
    FIG. 2 shows that the second elastic return means 16 can also be used to make its own contribution to the friction, by the exercise of a radial centripetal force F on the shoe 12. Preferably, the torque exerted on the shoe 12 by the first elastic return means 13 is greater than that exerted by the second elastic return means 16.
    Advantageously, the second elastic return means 16 is integral with the shaft 2 or respectively the wheel 5, here the wheel 5 in the case of the figures.
    In the variant of FIG. 3, the second arm 19 is limited radially with respect to the pivot axis D, opposite it, in abutment abutment on an adjusting device 20, which comprises an eccentric adjustment by discrete positions, for example by the use of an eccentric 21 pivoting on the wheel 5, on which it can be stopped in different angular positions, by a notch or the like.
    The forms of elastic return means, hooves, arms, and notches, can be very diverse. Fig. 4 thus illustrates a third embodiment, with a plurality of curved arms and blades substantially concentric with the shaft 2.
    FIG. 5 illustrates a fourth embodiment, with two arms 30, which are not cantilever like those of FIGS. 1 to 4, but stretched on the serge of the wheel 5 between attachment points 51, 52, 53, 54, and pinching together the shaft 2, each of these arms 30 being subjected to a centripetal radial thrust force exerted by second elastic return means 16 incorporated in the wheel 5. The shaft 2 is then guided by two braking surfaces 11, and there is no surface reserved for guiding, as the guide surfaces 4 of the other embodiments . The arrangement of the intrinsic adjustment means 14 is similar to that of the other embodiments presented above. Naturally this variant can be declined with a number of upper arms.
    It is still conceivable to combine this fourth embodiment with fixed guide surfaces 4, independent of the braking surfaces 11, and carried by fixed arms 31, as visible in a fifth embodiment in FIG. 6.
    Naturally, the assembly 1 according to the invention may comprise a plurality of braking surfaces 11, in particular distributed in a balanced manner about the pivot axis D.
    In an advantageous embodiment as non-magnetic, the wheel 5 is made of monocrystalline silicon or polycrystalline silicon, or a similar material implemented by a photolithographic process, or "MEMS" or "LIGA", or the like.
    In an advantageous embodiment, the shaft 2 is made of ruby.
    Preferably, the movable braking assembly 1 according to the invention consists solely of two components which are the shaft 2 and the wheel 5. And this shaft 2 and the wheel 5 are each a one-piece component comprising all the necessary support surfaces, as well as the means of return and maintenance required position.
    Advantageously, the shaft 2 is fixedly mounted on a plate or a bridge that includes a mechanism 100 or a clockwork movement in which is integrated the mobile braking assembly 1 considered.
    The invention also relates to a timepiece mechanism 100, in particular a movement, comprising at least one such mobile braking assembly 1.
    The invention also relates to a timepiece 200 comprising at least one such mobile braking assembly 1.
    In sum, the adjustment of the arming of the brake, thus achieved, allows to change the force (or torque) of friction exerted on the shaft, in a reproducible manner, which facilitates and speeds up the settings.
    The invention reduces the number of components compared to a traditional mechanism, to reduce the gear sets (always visible on the display at the level of the needles), which goes in the direction of reliability improved, and a reduction in costs, especially as a manufacturing by cutting is possible.
    The invention reduces wear compared to traditional spring brakes.
    权利要求:
    Claims (15)
    [1]
    1. A mobile watch brake assembly (1), comprising a shaft (2) having a first surface (3) cooperating in pivotal guiding with a second surface (4) of a wheel (5) pivotally mounted on said shaft (2), wherein said first surface (3) or respectively said second surface (4) comprises at least one braking surface (11) carried by at least a first braking arm (30) subjected to the action of at least one first elastic return means (13), integral with said shaft (2) or said wheel (5) respectively, and arranged to exert a radial force with respect to said pivot axis (D) on said second surface (4) or respectively said first surface (3), characterized in that said movable braking assembly (1) comprises intrinsic means of adjustment (14) by discrete values of the friction exerted by said braking surface (11) on said second surface (4) or respectively said first surfac e (3).
    [2]
    2. mobile brake assembly (1) clockwork according to claim 1, characterized in that said first surface (3) or said second surface (4) each comprises, distinct from one another, a at least one guide surface (10) in a predetermined clearance, about a pivot axis (D), said second surface (4) or said first surface (3), and at least one said braking surface (11).
    [3]
    3. mobile braking assembly (1) according to claim 1 or 2, characterized in that said intrinsic adjustment means (14) comprise a bearing surface (18) arranged to cooperate in thrust bearing with a complementary surface bearing (17) that includes said shoe (12) on the opposite side to said braking surface (11).
    [4]
    4. mobile brake assembly (1) according to claim 3, characterized in that said intrinsic adjustment means (14) comprise at least a second flexible arm (19) carrying said bearing surface (18), said second arm (19) being or limited radially with respect to said pivot axis (D) opposite it in abutment abutment on a control device arranged to occupy one of a plurality of discrete positions with respect to said shaft (2) or respectively to said wheel (5), or biased towards said complementary bearing surface (17) of said shoe (12) by a second elastic return means (16).
    [5]
    5. mobile braking assembly (1) according to claim 4, characterized in that said second arm (19) is biased towards said complementary bearing surface (17) of said shoe (12) by said second elastic return means ( 16), and comprises at least one finger (15), or respectively a notch, subjected to the return action of said second elastic return means (16) and arranged to cooperate with only one at a time among a plurality of notches (23) that comprises said shaft (2) or respectively said wheel (5), each said notch (23) corresponding to a different friction setting value.
    [6]
    6. mobile brake assembly (1) according to claim 5, characterized in that said shoe (12) is subjected to both the action of at least a first elastic return means (13) and to the action of said second elastic return means (16).
    [7]
    7. mobile braking assembly (1) according to one of claims 4 to 6, characterized in that said second elastic return means (16) is integral with said shaft (2) or said wheel (5) respectively.
    [8]
    8. mobile braking assembly (1) according to one of claims 4 to 7, characterized in that the torque exerted on said shoe (12) by said first elastic return means (13) is greater than that exerted by said second elastic return means (16).
    [9]
    9. mobile braking assembly (1) according to claim 4, characterized in that said second arm (19) is limited radially relative to said pivot axis (D) opposite thereof in abutment abutment on said adjusting device (20) which comprises an eccentric adjustment by discrete positions.
    [10]
    10. mobile brake assembly (1) according to one of the preceding claims, characterized in that said wheel (5) is made of monocrystalline silicon or polycrystalline.
    [11]
    11. mobile braking assembly (1) according to one of the preceding claims, characterized in that said shaft (2) is made of ruby.
    [12]
    12. mobile braking assembly (1) according to one of the preceding claims, characterized in that it consists solely of two components which are said shaft (2) and said wheel (5).
    [13]
    13. mobile braking assembly (1) according to one of the preceding claims, characterized in that said shaft (2) is fixedly mounted on a plate or a bridge that comprises a mechanism (100) or a clockwork movement in which is integrated said movable braking assembly (1).
    [14]
    14. Clock mechanism (100) comprising at least one movable braking assembly (1) according to one of the preceding claims.
    [15]
    15. Timepiece (200) comprising at least one movable braking assembly (1) according to one of claims 1 to 13.
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    同族专利:
    公开号 | 公开日
    CN105319943A|2016-02-10|
    HK1221290A1|2017-05-26|
    EP2977829A1|2016-01-27|
    US9529328B2|2016-12-27|
    US20160026154A1|2016-01-28|
    CN105319943B|2017-10-17|
    EP2977829B1|2017-07-12|
    JP2016024201A|2016-02-08|
    JP6014729B2|2016-10-25|
    引用文献:
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    EP3719583B1|2019-04-03|2021-11-10|ETA SA Manufacture Horlogère Suisse|Mechanical braking device for a clock mobile|
    EP3772673A1|2019-08-08|2021-02-10|ETA SA Manufacture Horlogère Suisse|Timepiece indexing element|
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    法律状态:
    2020-03-13| AZW| Rejection (application)|
    优先权:
    申请号 | 申请日 | 专利标题
    EP14178403.3A|EP2977829B1|2014-07-24|2014-07-24|Assembly with timepiece braking mobile|
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