• 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 regulating device for mechanical watch movement, comprising a balance, a spiral (2), and an anisochronism correction member (4) comprising: a finger (42) arranged relative to the spiral (2) of in order to be in punctual contact with the outer face (23) of said hairspring (2) when the hairspring (2) is at rest or in expansion, and to no longer be in contact with the hairspring (2) when the hairspring (2) is in contraction with an amplitude beyond a threshold, an attachment point (40) for mounting on a plate or bridge of said movement; said finger (42) and said attachment point (40) being fixed relative to one another, and non-coaxial.
    公开号:CH712225A1
    申请号:CH00276/16
    申请日:2016-03-04
    公开日:2017-09-15
    发明作者:Von Gunten Stéphane
    申请人:Mft Et Fabrique De Montres Et Chronomètres Ulysse Nardin Le Locle S A；
    IPC主号:
    专利说明:

    TECHNICAL FIELD [0001] The present invention relates to a regulating device for mechanical watch movement, comprising an organ for correcting the anisochronism.
    STATE OF THE ART [0002] Mechanical watch movements are regulated by means of a regulating device, which generally comprises a balance spring-spiral assembly. The oscillation frequency of this set determines the accuracy of the watch.
    An escapement is controlled by this regulating member to block or periodically release the train so as to regulate the running of the watch to the rhythm of the regulating member. The role of the escapement is also to give an impulse to the balance at each alternation, in order to keep it in oscillation and to compensate for friction.
    The exhaust disrupts the oscillations of the sprung balance assembly; for example, the conventional Swiss-anchor escapements oppose a pendulum-resistant torque during the clearance before the dead point and during the impulse after the neutral position, which is only partially compensated by the advance given during the impulse before the dead point. The exhaust therefore tends to increase the duration of each alternation, and to cause delay.
    This delay varies according to the amplitude of oscillation. The lower the oscillation amplitude of the balance, the greater the duration and the importance of the delay caused by the escape.
    The amplitude of oscillation itself depends on the position of the watch, accelerations undergone, and the engine torque provided by the cylinder of the watch. Therefore, the delay induced by the escape is variable and can not be fully compensated, which causes an isochronism error.
    [0007] The use of racket pins which make it possible to vary the active length of the spiral is known. For this purpose, the last turn of the hairspring passes between the two racket pins. At each oscillation, when the hairspring expands (or contracts), it touches one of the two rack pins, which reduces its useful length in oscillation and thus increases the average stiffness and oscillation frequency. The pins thus make it possible to adjust the running of the watch and possibly to make up part of the delay created by the escapement.
    The use of these racket pins is well known in itself. However, they have a number of disadvantages that the present invention aims to avoid or mitigate.
    [0009] It can first be seen that as the amplitude increases, the duration of support of the hairspring against the pins increases, which has the effect of creating a greater delay compensation at large amplitudes than at small amplitudes. . We have seen, however, that the delay created by the exhaust is important at low amplitudes, and less at large amplitudes. As a result, the racket pins make it possible to make up part of the delay created by the escapement; compensation is however insufficient at small amplitudes, and too large at large amplitudes.
    On the other hand, the mounting of racket pins is complex; these are small elements that must be mounted in a hole provided for this purpose, usually on the racket. It is not possible to position this racket and pin freely around the hairspring.
    [0011] EP 2 781 970 describes such a mechanism for adjusting the active length of a spiral spring, in which the pins form a one-piece assembly with a bridge. This solution facilitates assembly, but also requires a bridge near the point of contact. The operation of the pins is conventional.
    [0012] EP 2 908 187 discloses a control system of a clock resonator. In one embodiment, a cam is controlled by a regulating device to continuously change the active length of the hairspring, by changing the position along the hairspring from the point of contact of the cam with the hairspring. The progress of the oscillator therefore depends on the X and Y position of the cam at each instant t; this makes the device difficult to size and adjust. Moreover, the mounting of the cam is complex.
    EP2 690 508 discloses a spiral comprising on some turns stop means for modifying the rigidity of the spiral by deactivating or reactivation of certain turns.
    EP 2 690 507 discloses a bolt carrier provided with a braking member having an outer lip and an inner lip to change the resulting stiffness of the hairspring during acceleration contraction or expansion greater than a set value. The hairspring is free during normal alternations, that is to say when the amplitude does not reach the set value; beyond this value, a portion of the last turn is in contact with a rough track on the outer lip, expanding, or the inner lip in contraction. This element requires a sufficient distance between the last turn and the penultimate turn of the spiral to slide the inner lip. Moreover, the hairspring comes into contact with one of the lips during expansion or contraction of large amplitude, which has the effect of reducing the duration of the alternations of great amplitude above all else but does not make it possible to compensate for the delay at small alternations. Finally, the contact of the hairspring with a relatively long and rough track of the braking element prevents longitudinal sliding of the hairspring along the braking element, as soon as it is in contact. This results in a rapid change in the rigidity of the hairspring from the moment of contact, and a relatively brutal braking.
    BRIEF SUMMARY OF THE INVENTION [0015] An object of the present invention is to provide a regulator device free from at least some of the limitations of the above devices.
    According to the invention, these objects are achieved in particular by means of a regulating device for mechanical watch movement, comprising a balance, a hairspring, and an anisochronism correction member comprising: - a finger (42) disposed relative to the hairspring so as to be in point contact with the outer face (23) of said hairspring (2) when the hairspring is at rest or in expansion, and to no longer be in contact with the hairspring when the hairspring is in contraction with an amplitude beyond a threshold, - an attachment point for mounting on a plate or bridge of said movement; said finger and said fixing point being fixed with respect to each other, and not coaxial.
    The finger thus reduces the useful length of the hairspring when in contact with the hairspring, which therefore increases the stiffness of the hairspring to compensate for the delay created by the escapement.
    The point contact that allows the finger with the outer face of the spiral allows a dimensioning and a simplified adjustment, exerting a constraint at a single point of the spiral.
    This point contact also allows a slight longitudinal sliding of the contact point of the last turn along the finger. Only radial expansion is limited.
    The finger is advantageously provided with a smooth surface to allow this sliding.
    Contact with the finger is punctual, and therefore does not require calculation of surface geometry or control of the roughness. The accuracy obtained also depends little on manufacturing tolerances.
    The finger can be made of smooth metal, silicon, etc.
    The correction member is in contact with the outer face of the hairspring at rest. It exerts a prestress on the hairspring at rest, reducing the useful length that can oscillate.
    The correction member is advantageously arranged so as to be in contact with the outer face of the hairspring throughout the duration of alternations of small amplitude, and for the hairspring to take off from this point of contact during contraction of more large amplitude. The useful length of the hairspring therefore increases during contractions of large amplitude, which reduces the average stiffness of the hairspring and reduces the correction at large amplitudes.
    The correction member is advantageously constituted by a one-piece element provided with two faces on two levels only. It can thus be achieved by machining, stamping, electroerosion, etching, etc. from a flat plate, which allows an economical and precise manufacture.
    The correction member may also be implemented with an additive manufacturing method, for example by LIGA. Performing on two levels only reduces the number of masks and operations required.
    Compared to conventional racket pins, the correction member may advantageously occupy a single plane in the movement. It thus makes it possible to act on a point of the hairspring even if the arrangement of the other components does not make it easy to fix a pin. For example, the correction member may be mounted in the same plane as the hairspring, between the plate and the balance.
    The thickness of the correction member may be identical or less than that of the spiral.
    This planar shape of the correction member makes it possible to geographically distance the finger and the point of attachment on the plate or the bridge.
    In one embodiment, the fixing point of the correction member on the plate is further from the outer end of the spiral that the finger. This arrangement increases the range of possible positions for the fixing hole.
    In one embodiment, the correction member is bent around the periphery of the spiral. The finger is in this case advantageously at one end of the correction member near the outer end of said hairspring. The correction member extends around the periphery of the hairspring from this end in the winding direction of the hairspring. This arrangement frees up space near the end of the spiral.
    The correction member thus forms an arc around the axis of the balance beam. This arc extends over an angular distance between at least one fixing hole and the finger can be relatively large, for example between 90 ° and 270 °. This arrangement provides great freedom for placement of the mounting hole at any point on the deck or deck.
    In one embodiment, the fixing point is constituted by a fixing hole and allows a rotation of the correction member relative to the plate or the bridge of the movement to allow the setting to the mark, c ' that is to say the positioning of the plate anchor on the "anchor-balance" line at the neutral point of the balance. This allows adjustment by moving the correction member.
    In one embodiment, the attachment point is constituted by an oblong hole to allow mounting with a fixing screw and a rotation of the correction member relative to the plate or the bridge of the movement in order to set the mark. In this way, the point of contact with the anisochronism correction member is not modified with respect to the holding clip of the end of the hairspring.
    In one embodiment, the member comprises at least two attachment points, for example two fixing holes.
    In one embodiment, the one or more attachment points are constituted by through holes.
    The position of the correction member may be fixed, that is to say non-adjustable.
    The correction member may comprise a non-elastic deformation zone allowing adjustment of the position of said finger relative to the hairspring during adjustment.
    The correction member may incorporate a clamp for fixing the outer end of the hairspring. This allows for one simple piece to be produced that combines two functions. This also allows to link precisely the position of the end of the spiral and the finger.
    The clamp may comprise a plurality of jaws for clamping the end of the hairspring. This arrangement allows mounting without glue. It is easy to achieve in a flat room with two levels. Nevertheless, the use of glue is possible to seal the spiral clamp assembly, in particular for calibres requiring increased impact resistance.
    The correction device may comprise three jaws for clamping the end of the spiral in three distinct directions and / or for a three-point isostatic mounting.
    At least one of the jaws may be elastically deformable to tighten the end of the spiral. The hairspring is therefore held by elastic deformation of one or more jaws.
    BRIEF DESCRIPTION OF THE FIGURES [0043] Examples of implementation of the invention are indicated in the description illustrated by the appended figures in which:
    Fig. 1 illustrates a top view of a regulating device according to a first embodiment of the present invention (the cock has been voluntarily removed from this view for clarity).
    Fig. 2 illustrates a top view of the hairspring and the correction member according to the first embodiment.
    Fig. 3 illustrates a top view of a regulating device and an exhaust according to a second embodiment of the present invention.
    Fig. 4 illustrates a perspective view of a regulating device according to the second embodiment of the present invention (the cock being removed from view).
    Fig. 5 illustrates a top view of the hairspring and the correction member according to the second embodiment.
    Fig. 6 illustrates a top view of the hairspring and the correction member according to a third embodiment.
    Fig. 7 illustrates a top view of the hairspring and the correction member according to a fourth embodiment.
    Exemplary Embodiment (s) of the Invention [0044] FIG. 1 illustrates a view from above of a watch movement portion including in particular the regulating device mounted on the plate 7. The regulating device comprises a rocker 3 mounted on an axis 31 and a spiral 2. The correction member 4 is visible behind the pendulum.
    The hairspring 2 may be a hairspring of the type described in the patent application CH 708 429, the content of which is incorporated herein by reference. It can be made of silicon with one or more thermocompensation layers.
    In the example shown, the hairspring 2 is mounted on the platen side balance shaft 7, and the balance 3 is mounted on top of the hairspring. The correction member 4 is then in a plane between the plate and the plane of the balance. An arrangement of the spiral over the balance is also possible.
    FIG. 2 illustrates a top view of the hairspring 2 and the correction member 4 according to a first embodiment of the invention. This member allows to exert a prestress on the hairspring at rest and during its expansion. The anisochronism correction is performed by means of a point contact at the point 22 between the outer face of the spiral and a finger 42 of the correction member, so as to push this portion towards the axis of the balance. The support of the hairspring 3 against this correction member 4 is released during a contraction of the hairspring of sufficient amplitude.
    The support of the finger 42 on the spiral reduces the useful length of the latter. The hairspring 2 is therefore more rigid, and therefore oscillates at a higher frequency, which compensates at least in part for the delay caused by the exhaust.
    When the amplitude of oscillation increases, the hairspring 2 leaves the support against the finger 42 at each contraction, which lengthens the useful length of the hairspring and thus reduces the frequency of oscillation. The time during which the spring is released increases with the amplitude of the oscillations, which reduces the delay compensation at large amplitudes. The correction performed is therefore important at small amplitudes, when the escape induces a significant delay, and less or no at large amplitudes when the influence of the exhaust is less sensitive.
    The correction member 4 is advantageously constituted by a flat part. It therefore has two faces on two levels only. It is advantageously monobloc. It can be produced by subtractive manufacture from a metal foil, for example by stamping, electroerosion, machining, etching, etc., or by means of an additive method of the LIGA type, for example.
    In this variant, the correction member 4 is fixed in a single attachment point 40 on the plate 7 or on a bridge. The fixing point is constituted in this example by an oblong hole 40 in which a screw 41 is engaged for mounting on the plate. This attachment with an oblong hole allows setting the mark, adjusting the position of the member 4 according to two degrees of freedom (for example in translation and rotation). The screw 41 can be locked after adjustment, for example with a point of glue.
    In a variant not shown, the radial distance of the finger relative to the spiral is adjustable by elastic deformation of the correction member with an element such as a screw (or an eccentric).
    The finger 42 could be adjustable or elastically deformable by an element such as a screw (or an eccentric), or plastically deformable in two degrees of freedom, one tangential and the other radial.
    The correction member 4 comprises oblong openings 48 for guiding it during adjustment, by means of pins 49 or screws mounted in the plate 7 or in a bridge. In another embodiment not illustrated, the guide member is engaged in a groove in the plate and guided by its flanks.
    The elements 46 are friction springs which allow to position the correction member 4 away from a vertical side in the plate, and to position it more easily during assembly, avoiding the risk of involuntary sudden rotation.
    The angular distance relative to the axis of the balance between the attachment point 41 on the plate and the finger 42 is relatively large, for example between 90 and 120 °, preferably between 120 and 180 °. This distance offers a great freedom of positioning for the fixing point 40 and for the screw 41 which can be placed relatively freely at a distance from the correction point 22.
    The outer end of the spiral 2 is provided or shaped plate 21 thicker than the turns. The wafer may comprise a trapezoidal upper face. It is fixed by clamping in one end of the isochronism corrector 4 opposite to the finger 42 and shaped as a clamp 44. In the illustrated example, this clamp comprises three jaws 440, 441 and 442 to exert a clamping force on three different portions of the plate 21 and in three different directions. The clamp can be actuated by means of the lever 443 whose actuation allows to move the jaws to open the clamp and release or insert the wafer 21. The opening and closing of the clamp 44 is made by elastic deformation of portions of the correcting organ 4.
    The hairspring is therefore not attached to the cock as is usually the case, but to the correction member 4.
    In a variant not shown, the end of the spiral 21 could be provided with a profile, for example at least one toothing or a succession of bumps, to select the insertion position between the jaws of the holding clamp 44 among several positions available. Thus, the hairspring could be more or less engaged in the clamp, decreasing more or less the active length of the hairspring and, therefore, its stiffness.
    The angular distance of the portion of member 4 between the finger 42 and the end of the clamp 44 is preferably less than 90 ° relative to the axis of the balance, to immobilize only a limited portion of the end of the hairspring at rest and expanding.
    The jaws and the lever are formed in the same one-piece piece as the corrector member 4. The adjustment of the position of the corrector member 4 around the attachment point 41 for setting the mark does not affect the distance between the end of the hairspring 21 and the contact point 22.
    In one embodiment, the spiral 2 and the correction member 4 may be monobloc, and made in one piece, for example on a single flat part.
    Figs. 3 to 5 illustrate another embodiment of the invention. In this example, the correction member is integrated in a regulating member comprising a rocker 3, a hairspring 2, an escape wheel 5 and an anchor 6. The escape wheel 5 rotates about an axis 50 linked to an escape wheel bridge 32. The balance wheel rotates about the axis 31 connected to the balance bridge 30. The balance bridge and the exhaust wheel bridge are connected to each other and to the plate by two rods or screws 41.
    The anchor 6 is in this example devoid of axis and pivots thanks to a compliant mechanism provided with flexible blades 60 which deform at each oscillation. The invention can also be applied to a regulating member provided with a conventional anchor.
    The correction member 4 comprises in this example two holes to fix it to the bridges 30, 32 at the two attachment points 41. As in the example of FIG. 1, it comprises a finger 42 in contact with the outer face of the hairspring at rest, during the expansion of the hairspring, and as long as the contraction amplitude does not exceed a minimum threshold.
    The correction member 4 is connected at several points to the bridges 30, 32 and therefore to the plate or, in the case presented here, to the lower bridge of the tourbillon cage, by means of screws 41 engaged in through holes circular. Its position in the plane can not be adjusted. The position of the contact point 22 with the hairspring 2 can however be adjusted by deforming permanently, during adjustment, a deformable portion 45 of the part 4 to move the finger 42 relative to the attachment points 40. The part comprises a lever 450, on the opposite side of the finger 42 relative to the deformable portion 45. An action on this lever makes it possible to move the position of the finger 42 easily and with a reduced torque.
    It is also possible to provide through holes 41 non-circular, or with a diameter greater than that of the elements engaged in these holes, to allow adjustment of the position of the correction element even in the case of a fixation in several points.
    A correction member 4 comprising a plurality of oblong holes may be considered in order to allow movement relative to the plate. The mounting in several fixing points facilitates the positioning of the correction element in the plane of the spiral.
    Alternatively, a spiral fixing clamp could also be integrated in this correction member, as for the first embodiment.
    FIG. 6 illustrates an alternative regulating member similar to the variant of FIGS. 3 to 5, but wherein a finger 42 is at the end of a slender blade which can be plastically deformed to adjust the fulcrum on the hairspring.
    A finger 42 at the end of a blade that can deform elastically, to compensate for manufacturing tolerances, could also be considered.
    FIG. 7 illustrates an alternative regulating member similar to the variant of FIG. 6, also devoid of deformable portion. The finger 42 is at the end of a relatively rigid blade, to accurately and consistently define the position of the point of contact.
    Reference numbers used in the figures [0073] 1 Regulator device 2 Spiral 20 Ferrule 21 End of the spiral 22 Contact point with the anisochronism correction member 23 External face of the balance spring 3 Pendulum 30 Pendulum bridge 31 Balance shaft 32 Exhaust wheel bridge 4 Anisochronism correction device 40 Fixing point on a plate or bridge, eg fixing hole 41 Fixing screw on plate or bridge 42 Finger 44 Holding clamp on the end of the spiral (cock)
    权利要求:
    Claims (18)
    [1]
    440 Inner jaw 441 Intermediate jaw 442 External jaw 443 Gripper lever 45 Deformation zone 450 Deformation adjustment lever 46 Friction spring 48 Guide holes 49 Guide pins 5 Exhaust wheel 50 Exhaust wheel shaft 6 Anchor 60 Flexible Blades 7 Platinum 8 Bridge Claims
    1. Regulator device (1) for mechanical watch movement, comprising a balance (3), a spiral (2), and an anisochronism correction member (4) comprising: - a finger (42) arranged relative to the spiral so as to be in punctual contact with the outer face (23) of said hairspring (2) when the hairspring is at rest or in expansion, and to no longer be in contact with the hairspring when the hairspring is in contraction with an amplitude beyond beyond a threshold, - an attachment point (40) for mounting on a plate or bridge of said movement; said finger (42) and said fixing point (40) being fixed with respect to each other, and not coaxial.
    [2]
    2. Device according to claim 1, said member (4) being constituted by a one-piece element provided with two faces on two levels only.
    [3]
    3. Device according to one of claims 1 or 2, said attachment point (40) being further from the outer end of the hairspring (2) than said finger (42).
    [4]
    4. Device according to one of claims 1 to 3, said finger (42) being at one end of the correction member (4) near the outer end of said spring (2), said member (4) s extending around the periphery of the hairspring (2) from this end in the winding direction of the hairspring.
    [5]
    5. Device according to one of claims 1 to 4, said fixing point (40) for a rotation of said member (4) relative to said plate or said bridge of said movement to set the reference beam (3).
    [6]
    6. Device according to one of claims 1 to 5, said fixing point (40) being constituted by an oblong hole to allow movement of said member (4) relative to said plate or said bridge of said movement to bring mark the balance (3).
    [7]
    7. Device according to one of claims 1 to 6, comprising at least two said attachment points (40).
    [8]
    8. Device according to claim 7, said attachment points being constituted by round holes through (40).
    [9]
    9. Device according to one of claims 1 to 8, comprising a zone intended to be plastically deformed in order to adjust the position of said finger (42).
    [10]
    10. Device according to one of claims 1 to 9, comprising an element, for example a screw or an eccentric, for adjusting the position of said finger (42).
    [11]
    11. Device according to one of claims 1 to 10, said correction member (4) having at least one friction spring (46) to facilitate its positioning during assembly.
    [12]
    12. Device according to one of claims 1 to 11, comprising a clamp (44) for fixing the outer end of the spiral (2).
    [13]
    13. Device according to claim 12, said clamp (44) having a plurality of jaws (440, 441, 442) for clamping the end of the spiral (2).
    [14]
    14. Device according to claim 13, comprising three said jaws (440, 441, 442) for clamping the end of the spiral in three distinct directions.
    [15]
    15. Device according to one of claims 13 or 14, at least one of said jaws being intended to be elastically deformed to clamp the end of the spiral (2).
    [16]
    16. Device according to one of claims 12 to 15, the end of the spiral (2) being provided with a profile, for example of teeth or bumps, to allow adjustment of the depth of insertion into the clamp.
    [17]
    17. Device according to one of claims 1 to 16, the correction member (4) and the spiral (2) forming a single piece.
    [18]
    18. Device according to one of claims 1 to 17, said member being arranged to be in contact with the outer face (23) of the hairspring for the duration of alternations of small amplitude, and for the hairspring to take off. this point of contact during contractions of greater amplitude.
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    同族专利:
    公开号 | 公开日
    CH712225B1|2020-07-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US473422A|1891-11-05|1892-04-19|Watch-regulator |
    CH220257A|1944-09-12|1942-03-31|Marti Fritz|Regulator device, with balance and hairspring, for timepieces.|
    US2717487A|1954-06-02|1955-09-13|Hamilton Watch Co|Balance wheel motion limiter|
    DE2003940A1|1970-01-29|1971-08-05|Krueger Gustav Dipl Phys Dr Re|Ruecker|
    EP2781970A1|2013-03-19|2014-09-24|Nivarox-FAR S.A.|Mechanism for adjusting a timepice hairspring|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH00276/16A|CH712225B1|2016-03-04|2016-03-04|Regulating device comprising an anisochronism correction member.|CH00276/16A| CH712225B1|2016-03-04|2016-03-04|Regulating device comprising an anisochronism correction member.|
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