• 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 an oscillator (1) for a watch movement comprising a balance bridge (22), intended to be secured to a frame member of the watch movement and carrying a bearing housing a balance shaft (6) rotatably mounted, a rocker (2) and a first locking member (8) of a first end of a spiral (4), both integral with the rocker shaft (6), a second locking member (48) of the second end of the spiral (4), characterized in that it comprises a support having a curved slot (46) of substantially constant radius of curvature and arranged concentrically with the bearing (20), the second locking member (48) being accommodated in the curved slot (46) being able to occupy different positions along the length of the latter to adjust the position of the second end of the hairspring (4) with reference to the pendulum bridge (22).
    公开号:CH714249A1
    申请号:CH01262/17
    申请日:2017-10-16
    公开日:2019-04-30
    发明作者:Brechbühl Jérémy；Belo Vasco；Herrera Bruno；Van Straaten Matthijs；Chervet Bernard
    申请人:Richemont Int Sa；
    IPC主号:
    专利说明:

    Description
    TECHNICAL FIELD [0001] The present invention relates to an oscillator for a watch movement comprising a balance bridge, intended to be secured to a frame element of the watch movement and carrying a bearing housing a rotatably mounted balance shaft, a balance and a first locking member of a first end of a hairspring, both integral with the balance shaft, a second locking member of the second end of the hairspring.
    The invention also relates to a watch movement comprising such an oscillator and a timepiece comprising such a watch movement.
    STATE OF THE ART [0003] Many timepieces comprising an oscillator meeting the above characteristics have been known for a long time.
    [0004] Patent application CH 707 226 A2 describes and illustrates a recent example of a compact construction of an oscillator of this type. This oscillator comprises a balance shaft carrying a balance and a ferrule, ensuring the attachment of the inner end of a spiral, and a double plate made in one piece and frictionally engaged on the balance shaft. Furthermore, the balance shaft comprises directly on its surface a raceway to define the inner ring of a ball bearing or roller. This bearing comprises an outer ring having two ears to ensure its assembly on a bridge to be assembled to a frame member of a watch movement. This bridge at the same time performs the role of anchor bridge since it carries a stone in which the anchor rod is rotated. This construction therefore has a relatively small footprint, particularly in the direction of its thickness, and no bridge comes to cover the sprung-balance which gives it an airy appearance. Only a bolt carrier extends partially above the balance-balance to ensure the attachment of the outer end of the spiral, the bolt carrier being assembled to the platen of the watch movement.
    If the construction illustrated in this patent application does not require raquetterie due to the use of a balancing screw adjustment, it does not present any real possibility of adjustment of the marker, if n ' is possibly very limited by slight rotation of the bolt carrier.
    In general, it is desirable to provide a marker adjustment device having a simple operating mode and which may more particularly and advantageously be implemented in relation to oscillator constructions that do not have a raquetetterie.
    DISCLOSURE OF THE INVENTION [0007] A main object of the present invention is to provide an oscillator construction for a watch movement of the type mentioned above, having the possibility of adjusting the marker in a simple manner and with a minimal impact on the clutter of the oscillator and on its appearance.
    For this purpose, the present invention relates more particularly to an oscillator for a watch movement having the aforementioned characteristics, characterized in that it comprises a support having a curved slot of substantially constant radius of curvature and arranged concentrically at the bearing of balance, the second locking member being housed in the curved slot being able to occupy different positions along the length of the latter to adjust the position of the second end of the hairspring with reference to the balance bridge.
    Thanks to these features, the construction of the oscillator according to the invention provides significant latitude to proceed with the setting of the marker, without having a significant impact on its size. In addition, this adjustment is very simple to achieve by moving the second locking member along the curved slot which thus provides a guide substantially following the curvature of the last turn of the spiral.
    Preferably, the oscillator comprises a locking device capable of switching, on demand and in one direction or the other, between a first active state, in which it acts on the second locking member for the lock in a given position, and a second inactive state, in which it leaves the second free locking member to be moved along the length of the curved slot.
    Thus, different embodiments are possible for the locking device without departing from the scope of the invention and to allow a watchmaker to simply and reliably perform the setting of the marker.
    According to a preferred embodiment, the support of the curved slot is an anchor bridge. In this case, it can advantageously be provided that the anchor bridge has an indexed position with reference to the balance bridge.
    According to an alternative embodiment, it can be provided that the second locking member comprises a range of transverse dimensions greater than the width of the curved slot, and that the locking device comprises a plate arranged substantially opposite the curved slot. , in support against the range in the first active state.
    Furthermore, it can be provided, in general, that the balance bearing defines an outer ring ball bearing or roller cooperating with an inner ring secured to the balance shaft. In this case, it is advantageous to provide a raceway is formed directly on the surface of the balance shaft to define at least a portion of the inner ring.
    According to additional preferred features of the present invention, it is also possible that the balance shaft carries a double plate made integrally with it.
    According to other additional preferred features of the present invention, it can be provided, when the first locking member of the hairspring is a ferrule arranged to friction on the balance shaft, that the balance is engaged friction or riveted on the ferrule.
    Advantageously, the shell comprises a bearing surface for the balance and a spiral support located between the bearing surface and the balance bridge.
    The present invention also relates to a watch movement comprising an oscillator responding to the characteristics which have just been exhibited, as well as a timepiece comprising such a watch movement.
    BRIEF DESCRIPTION OF THE DRAWINGS [0019] Other features and advantages of the present invention will appear more clearly upon reading the detailed description of a preferred embodiment which follows, with reference to the accompanying drawings given as non-limiting examples. in which: FIG. 1 is a simplified and exploded perspective view of a portion of an oscillator for clock movement according to a preferred embodiment of the invention; fig. 2a is a simplified perspective view of the components illustrated in FIG. 1 when assembled; fig. 2b is a view similar to the view of FIG. 2a when the oscillator according to the preferred embodiment of the invention is shown cut in the middle, along a sectional plane parallel to the plane of the sheet, and FIGS. 3a, 3b, 3c show the same view of a part of a watch movement at successive stages of assembly of the oscillator according to the preferred embodiment of the invention.
    Embodiment (s) of the invention [0020] FIG. 1 shows a simplified and exploded perspective view of a portion of an oscillator 1 for a watch movement according to a preferred embodiment of the invention. Figs. 2a and 2b show perspective views of the oscillator 1 when assembled, the assembly being fully illustrated in FIG. 2a and in section in FIG. 2b to make some construction details apparent.
    In general, only the elements necessary for the proper understanding of the invention have been illustrated for the sake of clarity and brevity.
    The oscillator 1 is of the sprung-balance type. It comprises a balance 2, adjusting screw, and a spiral 4 interacting with each other in a conventional manner.
    The balance 2 and the spiral 4 are intended to be assembled to a balance shaft 6 by means of a shell 8 engaged frictionally on the balance shaft 6 in known manner. The ferrule acts as a first locking member of a first end, internal, spiral 4, in a conventional manner.
    [0024] It is more particularly apparent from FIG. 2a, but especially of fig. 2b, that the ferrule 8 here plays a particular role compared to the known constructions: it is engaged on the balance shaft 6 in a conventional manner, but the rocker 2 is engaged on it, preferably riveted, rather than being positioned in bearing against a shoulder of the balance shaft 6 as is generally the case. This construction makes it possible to limit the stresses applied to the balance shaft 6 which could break otherwise, depending on the material in which it is made, for example ceramic. In addition, this construction also reduces the size of the oscillator in the direction of its thickness, the balance 2 and the spiral 4 being located very close to one another.
    The balance shaft 6 here fulfills several additional functions, advantageously and preferred but not absolutely necessary for the implementation of the present invention. More specifically, a conventional double plate 10, 12 is made in one piece with the rocker shaft 6. The large plate 10 is pierced with a hole 14, axial, for receiving a plate pin 16 (in FIG. 2b) for cooperating with an anchor of an escapement.
    Furthermore, a raceway 18 is formed directly on the surface of the balance shaft 6 so that the latter can play the role of at least a portion of an inner ring of a ball bearing or rollers .
    The rocker shaft 6 is then intended to be engaged in the central bore 20 of a rocker bridge 22 defining an outer ring of the bearing, the central bore 20 acting as a bearing for the balance shaft 6.
    A ring 24 defining an additional annular bearing surface of the bearing is secured to the balance shaft 6 after insertion of the balls 26 to maintain the latter captive in the bearing thus closed.
    Note that here, preferably in a nonlimiting manner, the shell 8 comprises a bearing surface for the rocker 2 and a spiral support 4 located between the bearing surface and the rocker bridge 22.
    Furthermore, the rocker bridge 22 is here directly associated with an anchor bridge 28 also having a central bore 30 defining a housing for the double plate 10, 12 of the balance shaft 6 and to allow it by subsequently to cooperate with the anchor, as will be apparent more particularly from Figs. 3a to 3c.
    Note that, preferably not limited to, the rocker bridge 22 has two holes 32 to be aligned with two holes 34 of the anchor bridge 28, for purposes of indexing these two bridges, as this will also emerge from fig. 3a to 3c.
    Similarly, the rocker bridge 22 has three additional holes 36 intended to be aligned with three corresponding recesses 38 of the anchor bridge 28, to allow the assembly of the oscillator on the plate of a watch movement. as will also be apparent from FIGS. 3a to 3c.
    Finally, the anchor bridge 28 has two additional substantially diametrically opposed functional areas, by way of nonlimiting illustration.
    On the one hand, the anchor bridge 28 comprises an elevated portion 40 housing a stone 42 for receiving the anchor rod.
    On the other hand, the anchor bridge 28 comprises a portion 44 having an extra thickness with reference to the average thickness of the bridge. A slot 46 passing through the portion 44 along its thickness is formed in the anchor bridge 28 to define a housing for a second locking member of the second, outer end of the spiral 4, here a pin 48.
    The slot 46 is curved, with a substantially constant radius of curvature, and is arranged concentrically with the central bore 30 of the anchor bridge 28, so that it is concentric with the central bore 20 of the bridge of balance 22 and that its center of curvature is, therefore, located on the pivot axis of the balance shaft 6.
    The peak 48 has a bearing 50 whose transverse dimensions are greater than the width of the slot 46 to define a stop in the axial direction. The span 50 is surmounted by a barrel 52 advantageously having two flats 53 opposite to cooperate with the walls of the slot 46 to provide a guide of the stud 48 along the length of the slot 46, when adjusting the mark. The barrel 52 is itself surmounted by a clamp 54 for locking the conventional spiral, intended to cooperate with the end turn of the spiral 4, typically by gluing. Thus, any displacement of the stud 48 along the length of the slot 46 has the effect of moving the outer end of the spiral 4 with reference to its inner end, which allows to adjust the reference of the oscillator, that is to say to say to ensure that the oscillations of the balance 2 on either side of its rest position are symmetrical.
    A locking device is provided to lock the stud 48 in the position corresponding to the setting of the marker to fix it. This locking device comprises a plate 56 intended to be positioned substantially facing the slot 46 and bearing against the bearing 50 of the stud 48 to press against the anchor bridge 28 and immobilize the stud 48. The assembly of the plate 56 to the anchor bridge 28 is here made by means of two screws 58.
    Thus, it is understood that, starting from a given position of the stud 48 in the slot 46, the watchmaker wishing to adjust the mark must loosen the two screws 58 to move the plate 56 away from the anchor bridge 28 and release the piton 48 which can then be moved to a new position. The two screws 58 can then be tightened to bring the wafer 56 closer to the anchor bridge 28 and ensure that the bearing 50 of the stud 48 is veneered against the anchor bridge 28, thus ensuring the locking of the stud 48.
    Of course, the forms illustrated and described for the stud 48 and the locking device are by way of non-limiting example and the skilled person will not encounter any particular difficulty to adapt them according to his own needs .
    By way of additional example, it may be provided that the scope of the stud is located between the barrel and the clamp, so as to rest on the upper plane of the anchor bridge in the orientation of FIG. 1. The barrel could then be provided with a tapped central hole with which a span screw could cooperate in such a manner that, when this screw was tightened, in a movement from bottom to top in the view of FIG. 1, the anchor bridge would be caught in a vice between it and the reach of the bolt, thus ensuring a locking of the latter.
    Other solutions are still possible. For example, it can be provided that the stud is inserted by force into the curved slot, in the axial direction, to be locked. The bolt should then be removed from the curved slot before each adjustment to be able to be moved along the length of the slot and then pushed into the slot to be locked again. In this case, its barrel could be conical and the walls of the curved slot could be inclined. In addition or alternatively, the stud could be provided with a deformable portion or provided with a deformable ring facilitating its insertion and frictional holding in the curved slot.
    Figs. 3a, 3b and 3c represent, in a same simplified perspective view, successive steps of assembling the oscillator 1 which has just been described on a watch movement.
    The plate 60 of the watch movement is shown but will not be described in detail, since it comprises various particular recesses having no connection with the implementation of the present invention.
    The plate 60 comprises a double recess 62 whose left part in FIG. 3a is intended to receive the oscillator 1 and the right portion is in particular for receiving the escape wheel (not shown). The plate comprises a stone 64 located substantially at the boundary between the two parts of the recess 62 and in which is housed the rod 66 of the anchor 68.
    The recess 62 has a complex shape substantially complementary to that of the oscillator 1, in particular with different regions of different depths.
    A first small recess 70 is formed in the region around the fork and the stinger of the anchor 68, this recess 70 being intended to accommodate the small plate 12 of the balance shaft 6, which is intended to cooperate with the stinger of the anchor 68. The pin 16 driven into the large plate 10 is in turn intended to cooperate with the fork of the anchor 68, in a conventional manner.
    A second small recess 72 has a shape similar to that of the wafer 56 and the portion 44 of the anchor bridge 28 having an extra thickness, that is to say the portion in which the slot 46 is arranged for to house the piton 48.
    Moreover, two feet 74 extend from the bottom of the recess 62, and three pillars 76 threaded for receiving screws.
    [0050] Moving on from FIG. 3a in FIG. 3b, it can be seen that the anchor bridge 28 has been put in place on the plate 60, its holes 34 being engaged on the feet 74, the pillars 76 then being situated in the recesses 38 of the anchor bridge 28.
    It is also seen in FIG. 3b that the elevated portion 40 of the anchor bridge 28 defines a passage for the anchor 68.
    In addition, the central bore 30 of the anchor bridge 28 has two projecting portions 78 defining starlets for the anchor 68.
    [0053] Turning to FIG. 3c, it is found that the remaining components are preassembled on the balance bridge 22 before it is placed on the anchor bridge 28. On the one hand, the bearing is formed by assembly of the balance shaft 6 to the balance bridge 22, with insertion of the balls 26 and closure of the bearing with the ring 24. On the other hand, the spiral 4 and the balance 2 are assembled to the shell 8, before the latter is engaged by force on the balance shaft 6.
    The assembly thus assembled is then approached to the plate 60, the holes 32 of the balance bridge 22 being aligned with the feet 74 so as to engage the latter in the holes 32.
    Three screws 80 are then screwed into the pillars 76 to secure the oscillator 1 to the plate 60.
    With the features just described, it is possible to realize an oscillator construction of limited complexity, whose assembly is very simple and still offers the possibility of a precise adjustment of its chronometric properties. since its landmark can be adjusted.
    The foregoing description attempts to describe a particular embodiment by way of nonlimiting illustration and, the invention is not limited to the implementation of certain particular features which have just been described, as for example the forms illustrated and described for the pendulum and anchor bridges, the bolt and for its locking device, as well as for the balance shaft and the ferrule. Thus, for example, as was noted above, the ferrule could have a more conventional structure, that is to say not to carry the pendulum, without departing from the scope of the present invention. It will also be noted that the balance and anchor bridges are not necessarily directly integral with each other to implement the invention.
    Those skilled in the art will not encounter any particular difficulty in adapting the content of the present disclosure to their own needs, and implement an oscillator for a watch movement comprising a sprung balance associated with a locking member of the invention. external end of the spiral arranged to be able to move along a curved slot, formed in a suitable support preferably occupying a predefined fixed position with reference to the balance bridge, to allow a modification of the relative positions between the two ends of the spiral, without depart from the scope of the invention.
    权利要求:
    Claims (12)
    [1]
    Oscillator (1) for a watch movement comprising a pendulum bridge (22) intended to be secured to a frame element (60) of the watch movement and carrying a bearing (20) housing a balance shaft (6) rotatably mounted, a rocker (2) and a first locking member (8) of a first end of a spiral (4), both integral with said rocker shaft (6), a second locking member (48) of the second end of said hairspring (4), characterized in that it comprises a support having a curved slot (46) of substantially constant radius of curvature and arranged concentrically with said bearing (20), said second locking member (48) being accommodated in said curved slot (46) being capable of occupying different positions along the length thereof to adjust the position of said second end of said hairspring (4) with reference to said pendulum bridge (22).
    [2]
    2. Oscillator (1) according to claim 1, characterized in that it comprises a locking device (56, 58) capable of switching, on demand and in one direction or the other, between a first active state, wherein it acts on said second latch member (48) to lock it in a given position, and a second inactive state, wherein it allows said second latch member (48) to be moved along the length of said slot curved (46).
    [3]
    3. Oscillator (1) according to claim 1 or 2, characterized in that said support is an anchor bridge (28).
    [4]
    4. Oscillator (1) according to claim 3, characterized in that said anchor bridge (28) has a position indexed with reference to said balance bridge (22).
    [5]
    5. Oscillator (1) according to one of claims 2 to 4, characterized in that said second locking member (48) comprises a bearing surface (50) of transverse dimensions greater than the width of said curved slot (46), and in that said locking device (56, 58) comprises a plate (56) arranged substantially facing said curved slot (46), bearing against said bearing surface (50) in said first active state.
    [6]
    6. Oscillator (1) according to one of the preceding claims, characterized in that said bearing (20) defines an outer ring of a bearing, ball or roller, cooperating with an inner ring integral with said balance shaft (6). ).
    [7]
    7. Oscillator (1) according to claim 6, characterized in that a raceway (18) is formed directly on the surface of said balance shaft (6) to define at least a portion of said inner ring.
    [8]
    8. Oscillator (1) according to one of the preceding claims, characterized in that said balance shaft (6) carries a double plate (10, 12) formed integrally with it.
    [9]
    9. Oscillator (1) according to one of the preceding claims, said first locking member of said spring (4) being a ferrule (8) arranged frictionally on said balance shaft (6), characterized in that said balance (2 ) is frictionally engaged on said ferrule (8).
    [10]
    10. Oscillator (1) according to claim 9, characterized in that said ferrule (8) comprises a bearing surface for said balance (2) and a spiral support (4) located between said bearing surface and said bridge balance (22).
    [11]
    11. Watch movement comprising an oscillator (1) according to one of the preceding claims.
    [12]
    12. Timepiece comprising a watch movement according to claim 11.
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    同族专利:
    公开号 | 公开日
    CH714249B1|2021-05-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CH705605A2|2011-10-14|2013-04-15|Frederique Constant S A|Device for adjusting length of coil of beam-spiral type oscillator, has racket arranged with adjustable orientation on clockwork movement frame, where racket carries clamping units of terminal portion of coil to define length of coil|
    CH707226A2|2012-11-16|2014-05-30|Richemont Int Sa|Clock movement for timepiece, has balance shaft rotatively mounted on frame element by bearing, where bearing and frame element are partially arranged in internal volume of felloe containing center of gravity of balance wheel|
    EP3037896A1|2014-12-22|2016-06-29|ETA SA Manufacture Horlogère Suisse|Detachable stud support|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH01262/17A|CH714249B1|2017-10-16|2017-10-16|Oscillator for watch movement.|CH01262/17A| CH714249B1|2017-10-16|2017-10-16|Oscillator for watch movement.|
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