EP3882713A1 - Uhrwerk, das mit einer uhrhemmung mit einem magnetischen system ausgestattet ist - Google Patents

Uhrwerk, das mit einer uhrhemmung mit einem magnetischen system ausgestattet ist Download PDF

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Publication number
EP3882713A1
EP3882713A1 EP20164021.6A EP20164021A EP3882713A1 EP 3882713 A1 EP3882713 A1 EP 3882713A1 EP 20164021 A EP20164021 A EP 20164021A EP 3882713 A1 EP3882713 A1 EP 3882713A1
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EP
European Patent Office
Prior art keywords
anchor
magnetic
escape wheel
mechanical
angular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20164021.6A
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English (en)
French (fr)
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EP3882713B1 (de
Inventor
M. Gianni DI DOMENICO
M. Dominique LECHOT
M. Marc STRANCZL
M. Benoît LÉGERET
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Swatch Group Research and Development SA
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Swatch Group Research and Development SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Swatch Group Research and Development SA filed Critical Swatch Group Research and Development SA
Priority to EP20164021.6A priority Critical patent/EP3882713B1/de
Priority to US17/175,166 priority patent/US11886146B2/en
Priority to JP2021028337A priority patent/JP7100733B2/ja
Priority to CN202110305234.7A priority patent/CN113495473B/zh
Publication of EP3882713A1 publication Critical patent/EP3882713A1/de
Application granted granted Critical
Publication of EP3882713B1 publication Critical patent/EP3882713B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • G04B15/08—Lever escapements
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/26—Compensation of mechanisms for stabilising frequency for the effect of variations of the impulses
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance
    • G04C3/047—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance using other coupling means, e.g. electrostrictive, magnetostrictive
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C5/00—Electric or magnetic means for converting oscillatory to rotary motion in time-pieces, i.e. electric or magnetic escapements
    • G04C5/005—Magnetic or electromagnetic means
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B15/00—Escapements
    • G04B15/06—Free escapements

Definitions

  • the invention relates to watch movements comprising an escapement provided with a magnetic system. More particularly, the invention relates to an escapement provided with a magnetic coupling system between an escape wheel and an anchor separate from the mechanical resonator, this anchor having an axis of rotation different from that of the mechanical resonator. As with a Swiss anchor, the anchor exhibits a reciprocating motion which is synchronous with the periodic motion of the mechanical resonator, but different.
  • magnetic escapement one understands an escapement provided with magnets arranged partly on the anchor and partly on the escape wheel so as to generate a magnetic coupling between the anchor and the escape wheel.
  • the stop position of the mechanical resonator can vary, within a certain angular zone, around its rest position as a function of the angular position of the escapement wheel when stopped, given the magnetic coupling of the latter. with the anchor.
  • This angular zone is limited by the two stop positions of the anchor against two pins limiting its reciprocating movement, because the pin of the mechanical resonator is located in the fork of the anchor when this resonator is finally stationary.
  • the invention relates to a watch movement comprising a mechanical resonator and an associated escapement which comprises an escape wheel having a first axis of rotation and an anchor separate from the mechanical resonator and having a second axis of rotation which is different from that of the mechanical resonator.
  • the mechanical resonator is coupled to the anchor so that, when this mechanical resonator exhibits an oscillation, the anchor undergoes an alternating movement between two rest positions in which it remains alternately during successive time intervals.
  • the anchor comprises at least one magnetic pallet formed by a magnet and the escape wheel comprises a periodic magnetized structure which defines a plurality of increasing ramps of magnetic potential energy for said magnetic pallet, each of these increasing ramps of energy.
  • magnetic potential being provided so that said magnetic pallet can climb it when the anchor is in a corresponding rest position among the two rest positions and a force torque supplied to the escape wheel is equal to a torque of nominal force or included in a range of values which is provided for normal operation of the watch movement.
  • Said magnetic paddle and the periodic magnetized structure are arranged so that the anchor undergoes a pulse of magnetic force in the direction of its reciprocating movement, after said magnetic paddle has climbed any of said increasing ramps of magnetic potential energy, when l The anchor tilts from one of the two rest positions having enabled this magnetic pallet to climb said any increasing ramp of magnetic potential energy towards the other rest position.
  • the escape wheel comprises at the at least a first part remote from the first axis of rotation and the anchor comprises at least a second part remote from the second axis of rotation. Then, when the mechanical resonator is at rest, the anchor has for any angular position ⁇ of the escapement wheel at rest an angular position of equilibrium ⁇ ER ( ⁇ ) which depends on this angular position ⁇ .
  • the first and second remote parts are in contact with each other while the mechanical resonator is at rest and the anchor is in the corresponding angular position of equilibrium ⁇ ER ( ⁇ ), the first and second remote parts being arranged so that the angular position of equilibrium ⁇ ER ( ⁇ ) of the anchor is, over at least a part of each range of angular positions among said at least one range of angular positions, a monotonic function of the angular position ⁇ of the escape wheel which moves away from a median position of the anchor with a variation of said angular position ⁇ in the direction of rotation provided for the escape wheel, this median position defining a zero angular position for the anchor at an equal angular distance from its two rest positions.
  • a maximum absolute value AM E of the angular position of equilibrium ⁇ ER ( ⁇ ) of the anchor on said at least one angular range is strictly less than an absolute angular value ⁇
  • each first remote part among said at least one first remote part has, in a polar coordinate system perpendicular to said first axis of rotation and centered on the latter, a first inclined surface so that each of said at least one remote second part can slide on at least a part of this first inclined surface while the escape wheel passes through a range of corresponding angular positions among said at least one range of angular positions and the anchor angularly follows a curve defined by the corresponding angular positions of equilibrium ⁇ ER ( ⁇ ).
  • each second remote part among said at least one second remote part has, in the aforementioned polar coordinate system, a second inclined surface when the anchor is in any angular position of equilibrium ⁇ ER ( ⁇ ) corresponding to any angular position of a range of angular positions, among said at least one range of angular positions, in which this remote second part is in contact with a first part remote among said at least one first remote portion, the second inclined surface being configured such that each first remote portion among said at least one first remote portion can slide over at least a portion of said second inclined surface while the escape wheel crosses a range of angular positions, among said at least one range of positions angular ons, which relates to the first and second distant parts considered and that the anchor angularly follows a curve defined by the corresponding angular positions of equilibrium ⁇ ER ( ⁇ ).
  • said at least one second part remote from the anchor is formed by two mechanical paddles and the escape wheel comprises a plurality of distant parts constituting said at least one remote first part, this plurality of distant parts being respectively associated with said plurality of increasing ramps of magnetic potential energy.
  • the two mechanical paddles are respectively associated with two magnetic paddles formed by two magnets arranged so as to be each at least periodically coupled magnetically, in repulsion, with the periodic magnetized structure of the escape wheel.
  • the plurality of distant parts is formed by a plurality of teeth and the two mechanical paddles are configured so as to form, in normal operation of the mechanical movement, mechanical stops for this plurality of teeth, so as to improve the performance. exhaust operation or to allow a step-by-step rotation of the escape wheel which is synchronized with the reciprocating movement of the anchor and therefore with the oscillation of the mechanical resonator.
  • the anchor and the escape wheel are arranged so that, when the anchor exhibits said reciprocating movement and the force torque supplied to the escape wheel is equal to said torque of nominal force or included in at least an upper part of said range of values expected in normal operation and after one of the two magnetic vanes has climbed any of said increasing ramps of magnetic potential energy following a tilting of the anchor in its corresponding rest position, the tooth of the escape wheel associated with said any one of said increasing ramps of magnetic potential energy undergoes at least a first impact on one of the two mechanical vanes of the anchor.
  • This first shock momentarily prevents the rotation of the escape wheel beyond an angular stop position, defined by said first or second mechanical pallet, before a next tilting of the anchor and it intervenes so as to dissipate at least partially kinetic energy of the escape wheel acquired following said tilting.
  • the escapement is arranged so that, following the first impact and before the next tilting of the anchor, the escape wheel is momentarily immobilized.
  • the watch movement comprises an escapement 12 which is associated with the mechanical resonator, the small plate and the pin of which are elements forming this escapement.
  • the escapement 12 further comprises an escape wheel 16 and an anchor 14 which is a member separate from the mechanical resonator and whose axis of rotation is different from that of this mechanical resonator.
  • the anchor 14 is formed, on the one hand, of a rod 20 terminated by a fork 18, comprising two horns 19a and 19b, and by a dart 8 and, on the other hand, of two arms 24 and 26 whose free ends respectively form two mechanical paddles 28 and 29.
  • the two mechanical paddles respectively support two magnets 30 and 32 which form two magnetic paddles of the anchor 14.
  • the mechanical resonator 2 is coupled to the anchor so that, when the resonator mechanical oscillates normally, this anchor undergoes a reciprocating movement, synchronized with the oscillation of the mechanical resonator, between two rest positions, defined by two limiting pins 21 and 22, in which the anchor remains alternately during successive time intervals.
  • the escape wheel 16 comprises a periodic magnetized structure 36 which is arranged on a disc 34 preferably made of non-magnetic material (which does not conduct magnetic fields).
  • the structure 36 has magnetized portions 38 which are generally circular defining increasing ramps of magnetic potential energy for the two magnetic vanes 30, 32, which each have an axial magnetization with a polarity opposite to that of the axial magnetization of the periodic magnetized structure. so as to generate magnetic repulsion between the magnetic paddles and the magnetized structure.
  • Each magnetized portion 38 has an increasing monotonic width. In particular, the width of the magnetized portions increases, over the whole of their useful length, in a linear manner as a function of the angle at the center.
  • the periodic magnetized structure 36 is arranged so that its outer periphery is circular, the arcuate portions 38 of this magnetized structure having the same configuration and being arranged circularly around the axis of rotation of the wheel. exhaust.
  • each increasing ramp of magnetic potential energy is provided so that each of the two magnetic paddles can climb it when the anchor is in a given rest position, among its two rest positions, and that a couple of force supplied to the escape wheel is approximately equal to a nominal force torque (in the case of a mechanical movement provided with a constant force system for driving the escape wheel) or within a range of values provided to ensure the normal operation of the watch movement (case of a conventional mechanical movement having a variable force torque applied to the escape wheel depending on the level of winding of the barrel or barrels if several are provided in series).
  • the increasing ramps of magnetic potential energy are climbed, when the anchor undergoes a reciprocating movement between its two rest positions and when the force torque supplied to the escape wheel is equal to said nominal force torque or within the range predicted values for this torque force in normal operation, successively by each of the first and second magnetic paddles when the anchor is respectively in its first and second rest positions, and alternately by these first and second magnetic paddles during the reciprocating movement of the anchor.
  • the two magnetic paddles and the increasing ramps of magnetic potential energy are arranged so that the anchor can undergo a pulse of magnetic force in the direction of its movement, after any of the two magnetic paddles has climbed any of said ramps.
  • increasing magnetic potential energy when the anchor swings from the rest position corresponding to this any ramp of magnetic potential energy to its other rest position.
  • Curve 52 shown in Figure 2 gives the angular position ⁇ FN ( ⁇ ) of the anchor, in normal operation of the watch movement, as a function of the angular position ⁇ of the escape wheel.
  • the horizontal sections of the curve 52 correspond to the anchor 14 in one or the other of its two rest positions (angular positions +/- ⁇ Max ) and the rising and falling sides correspond to the alternative tilting of this anchor, between its two rest positions, during which the anchor successively undergoes pulses of magnetic force, which allows it to supply sustaining pulses to the mechanical resonator via the fork 18.
  • the periodic magnetized structure 36 further defines for each of the two magnetic paddles magnetic barriers 46 which are located respectively following the increasing ramps of magnetic potential energy defined by the magnetized portions 38, these magnetic barriers being formed in particular by magnetized areas. 46 of the structure 36, the radial dimension of which is substantially equal to or greater than the longitudinal dimension of each of the two magnets 30 and 32 forming the magnetic vanes of the anchor. Each magnetized pad / magnetic barrier is arranged to exert a torque of magnetic force on the escape wheel 16, having a direction opposite to that.
  • the escape wheel further comprises protrusions which are respectively associated with increasing ramps of magnetic potential energy.
  • These protruding parts are formed by teeth 42 extending radially from a plate 40 which is integral with the escape wheel and located above the disc 34 carrying the magnetized structure 36. These teeth are located respectively after the portions. magnetized 38, on the side of their widest end, and are partially superimposed on the corresponding magnetized areas 46.
  • the teeth 42 are arranged to cooperate on start-up with the mechanical paddles 28 and 29, as will be explained in more detail later.
  • the teeth and mechanical paddles are formed by a non-magnetic material.
  • the teeth extend in a general plane in which also extend the two mechanical vanes 28, 29 of the anchor.
  • the two magnets 30, 32 are respectively supported by the two mechanical paddles and are also located in said general plane.
  • the figures only show a lower magnet structure, located below the general plane.
  • the escape wheel further comprises a structure upper magnet, of the same configuration as the lower magnet structure and supported by an upper disc preferably formed of a non-magnetic material.
  • the lower and upper magnet structures together form the periodic magnet structure. They have the same magnetic polarity, opposite to that of the two magnets of the anchor, and are arranged on either side of the geometric plane in which these two magnets forming the two magnetic vanes are located, preferably at the same distance.
  • This shock occurs so as to at least partially dissipate a kinetic energy of the escape wheel acquired following said tilting.
  • the teeth of the escape wheel are provided to absorb kinetic energy from this escape wheel, with each step of the escape wheel after an accumulation of magnetic potential energy in the escapement for a next impulse of maintenance of the mechanical resonator, and thus to limit a terminal oscillation during each step of its step-by-step rotation.
  • the escapement is arranged so that, following said at least one first impact of any one of the two mechanical paddles against any one of the teeth of the escape wheel, this first impact momentarily stopping the rotation of the escape wheel beyond an angular stop position, and before a subsequent tilting of the anchor, the escape wheel comes to rest in an angular stop position which corresponds by definition to a position of equilibrium of the forces present.
  • a tooth 42 presses against a mechanical stop of the anchor formed by one or the other of the two mechanical vanes.
  • the escapement is therefore a hybrid escapement, that is to say magnetic and mechanical.
  • PV M of the force torque M RE it is therefore expected, in normal operation and for the entire range of values PV M of the force torque M RE , that the escape wheel comes to a standstill momentarily, after at least a first shock of any kind. of its teeth against any one of the two mechanical paddles and before a subsequent tilting of the anchor, to an angular stop position in which any tooth presses against any mechanical paddle.
  • Each angular stop position is thus defined by a tooth bearing against a mechanical pallet.
  • the escape wheel comprises at least a first part distant relative to its axis of rotation
  • the anchor comprises at least a second part distant relative to its axis of rotation.
  • the escape wheel comprises a plurality of first distant parts which are formed by the teeth 42
  • the anchor comprises two second distant parts formed respectively by the first and second mechanical paddles 28, 29.
  • the anchor 14 is for any angular position ⁇ (angular stop position) of the escape wheel 16 in a corresponding angular position of equilibrium ⁇ ER ( ⁇ ) which depends on this angular position.
  • ⁇ angular stop position
  • ⁇ angular position of equilibrium
  • ⁇ ER angular position of equilibrium
  • the mechanical resonator when it is at rest, it is not necessarily located in its rest position (position of minimum mechanical energy with the hairspring relaxed), because the anchor can exert a certain force on it. made of the magnetic system of the escapement and / or the mechanical device which is provided within the framework of the invention, and move it into angular positions where the balance spring of this mechanical resonator is then slightly stretched and therefore exerts a small return force.
  • an equilibrium position is generally determined for the assembly consisting of the escapement and the mechanical resonator for each angular position ⁇ of the escape wheel, and an angular position of equilibrium ⁇ ER ( ⁇ ) is determined for the anchor.
  • the curve 50 at the Figure 2 giving the angular position of equilibrium ⁇ ER ( ⁇ ) of the anchor 14 as a function of the angular position ⁇ of the escape wheel 16, has substantially horizontal sections at a middle position, defining a zero angular position for l anchor 14, at an equal angular distance from the two rest positions of this anchor which correspond to the two extreme angular values +/- ⁇ Max for the reciprocating movement of the anchor.
  • the teeth 42 and the two mechanical paddles 28, 29 are arranged so that the angular position of equilibrium ⁇ ER ( ⁇ ) of the anchor 14 is, over at least a first part of each of the ranges of angular positions PC P1 and PC P2 , a monotonic function of the angular position ⁇ of the escape wheel which moves away from the median position '0' of the anchor with a variation of this angular position ⁇ in the direction of rotation provided for the escape wheel, as shown in Figure 2 .
  • a maximum absolute value AM E is provided for the angular position of equilibrium ⁇ ER ( ⁇ ) of the anchor on the angular position ranges PC P1 and PC P2 which is strictly less than an absolute angular value ( ⁇ Max of the two anchor rest positions, as also shown in Figure 2 .
  • the escape wheel 16 and the anchor 14 are arranged so that when the escape wheel begins to rotate, in a starting phase, from any angular position being subjected to a lower starting torque or equal to the torque expected in normal operation, it does not encounter any stop of magnetic or mechanical origin which is likely to stop it before this escape wheel reaches a next range of angular positions PC P1 or PC P2 , in particular said at least a first part of this next range of angular positions exhibiting said monotonic function.
  • the teeth 42 and the mechanical vanes 28, 29 are configured so that, in said next range of angular positions, the escape wheel 16 subjected to said starting torque is not stopped by the contact between the tooth and the tooth.
  • each of the teeth 42 has, in a polar coordinate system R, ⁇ (see Figures 1A to 1I ) perpendicular to the axis of rotation of the escape wheel 16 and centered thereon, a first inclined surface SI 1 which is inclined so that each of the first and second mechanical paddles 28, 29 can, in a phase of start, slide on this first inclined surface while the escape wheel passes through a corresponding range of angular positions ⁇ , among the ranges of angular positions PC P1 or PC P2 , and the anchor 14 at least partially follows a portion of the curve 50, which is defined by the angular positions of equilibrium ⁇ ER ( ⁇ ), corresponding to this range of angular positions.
  • each of the two mechanical paddles of the anchor has, in the polar coordinate system R, ⁇ associated with the escape wheel, a second inclined surface SI 2 when the anchor is in any angular position of equilibrium ⁇ ER ( ⁇ ) corresponding to any angular position ⁇ of a range of angular positions, among the ranges of angular positions PC P1 and PC P2 , in which the mechanical pallet considered is in contact with one of the teeth 42 of the escape wheel .
  • the second inclined surface SI 2 is configured so that each of the teeth 42 can, in a starting phase, slide on this second inclined surface while the escape wheel passes through a range of angular positions ⁇ , among the ranges of angular positions PC P1 and PC P2 , which relates to the tooth and the mechanical pallet considered, and that the anchor 14 at least partially follows a portion of the curve 50, which is defined by the angular positions of equilibrium ⁇ ER ( ⁇ ) , corresponding to said range of angular positions.
  • FIGS. 1A to 1I show a series of successive events occurring at the start of the assembly formed by the mechanical resonator 2 and the escapement 12 during a winding of the barrel of the watch movement incorporating this assembly, after stopping the watch movement due to its spring barrel disarmed.
  • the watch movement is stationary, the mechanical resonator at rest and the anchor in a corresponding angular position of equilibrium, which is the median position of the anchor which defines its zero angular position.
  • the drive mechanism of the escape wheel 16 applies a force torque to this escape wheel, allowing it to resume rotating in the intended clockwise direction, and a tooth 42 then comes into contact with mechanical pallet 28 (event shown in Figure 1B ), so as to generate on this mechanical pallet a tangential force F TD in a system of polar coordinates r, ⁇ associated with the anchor 14, that is to say perpendicular to the axis of rotation of this anchor and centered on this one.
  • this tangential force F TD is obtained by the fact that the initial point of contact between the tooth and the mechanical pallet is located on at least one of the two inclined surfaces SI 1 and SI 2 (see Figure 1C ) which the tooth 42 and the mechanical pallet 28 have respectively in the polar coordinate system which is associated with the escape wheel.
  • the rounded end part of the tooth then slides on the inclined surface SI 2 of the mechanical pallet 28 (inclined in the polar coordinate system associated with escape wheel) until the point of contact is located substantially at the bottom of this inclined surface SI 2 (event shown in Figure 1C ), tooth 42 exerting a tangential force F TD throughout the rotation of the escape wheel between the Figure 1B and the Figure 1C , and thus a starting torque on the anchor 14, which at least mainly transmits the starting torque to the mechanical resonator 2 via a horn of the fork 18.
  • the mechanical resonator thus receives a first mechanical starting pulse allowing it to 'be activated again, starting an oscillation.
  • the inclined surfaces SI 1 and SI 2 are inclined planes. It will be noted that, at start-up during contact between a tooth and a mechanical pallet, it is advantageous to have, as shown, a magnetic barrier 46 superimposed on the corresponding inclined surfaces SI 1 and SI 2 in order to be able to produce a certain magnetic repulsion force on the magnet associated with the mechanical pallet in contact with the tooth. This magnetic repulsion force reduces the contact force between the tooth and the mechanical pallet and therefore the friction when sliding one over the other, which opposes the rotation of the escape wheel and therefore when starting. . This particular configuration facilitates self-starting which can thus occur for a greater range of torque applied to the escape wheel.
  • each angular contact zone to correspond to points of contact on one and / or the other of the two inclined planes SI 1 and SI 2 .
  • the teeth or the two paddles each have an inclined surface while the two paddles or the teeth respectively each have a protruding part configured so as to be able to slide at start-up along each of said inclined surfaces in the angular zones. respective contact points.
  • the angular contact zones at start-up namely the zones of angular positions ⁇ ( ⁇ ) on which there is contact at start-up, are given substantially by the curve 50 of angular positions of equilibrium ⁇ ER ( ⁇ ), defined previously, on the respective angular contact zones for the escape wheel ( Figure 2 ).
  • FIG. 1G we see the escapement provide a first fully magnetic maintenance pulse, no tooth coming into contact with the inclined surface of the mechanical pallet 28, given that the tilting of the anchor has become faster than during the previous alternation .
  • the Figures 1H and 1I show the assembly formed of the mechanical resonator 2 and the exhaust 12 in a short transient phase before the appearance of a stationary operating phase corresponding to the normal operation of the watch movement whose barrel spring has been reset.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromechanical Clocks (AREA)
  • Micromachines (AREA)
  • Non-Mechanical Conveyors (AREA)
EP20164021.6A 2020-03-18 2020-03-18 Uhrwerk, das mit einer uhrhemmung mit einem magnetischen system ausgestattet ist Active EP3882713B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20164021.6A EP3882713B1 (de) 2020-03-18 2020-03-18 Uhrwerk, das mit einer uhrhemmung mit einem magnetischen system ausgestattet ist
US17/175,166 US11886146B2 (en) 2020-03-18 2021-02-12 Horological movement comprising an escapement equipped with a magnetic system
JP2021028337A JP7100733B2 (ja) 2020-03-18 2021-02-25 磁気的システムを備えるエスケープを備える計時器用ムーブメント
CN202110305234.7A CN113495473B (zh) 2020-03-18 2021-03-18 包括配备有磁性系统的擒纵机构的钟表机芯

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Application Number Priority Date Filing Date Title
EP20164021.6A EP3882713B1 (de) 2020-03-18 2020-03-18 Uhrwerk, das mit einer uhrhemmung mit einem magnetischen system ausgestattet ist

Publications (2)

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EP3882713A1 true EP3882713A1 (de) 2021-09-22
EP3882713B1 EP3882713B1 (de) 2022-09-21

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EP20164021.6A Active EP3882713B1 (de) 2020-03-18 2020-03-18 Uhrwerk, das mit einer uhrhemmung mit einem magnetischen system ausgestattet ist

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US (1) US11886146B2 (de)
EP (1) EP3882713B1 (de)
JP (1) JP7100733B2 (de)
CN (1) CN113495473B (de)

Citations (2)

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Publication number Priority date Publication date Assignee Title
EP3208667A1 (de) 2016-02-18 2017-08-23 The Swatch Group Research and Development Ltd Magnetisches hemmungsdrehteil eines uhrwerks
CH715049A2 (fr) * 2018-06-07 2019-12-13 Montres Breguet Sa Pièce d'horlogerie comprenant un tourbillon.

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EP2990885B1 (de) * 2013-12-23 2017-07-26 ETA SA Manufacture Horlogère Suisse Mechanisches Uhrwerk mit magnetischem Hemmungsmechanismus
EP2887157B1 (de) * 2013-12-23 2018-02-07 The Swatch Group Research and Development Ltd. Optimierte uhrhemmung
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EP3185083B1 (de) 2015-12-23 2018-11-14 Montres Breguet S.A. Mechanischer uhrmechanismus mit einer ankerhemmung
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CH715049A2 (fr) * 2018-06-07 2019-12-13 Montres Breguet Sa Pièce d'horlogerie comprenant un tourbillon.

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US20210294270A1 (en) 2021-09-23
CN113495473B (zh) 2023-01-13
CN113495473A (zh) 2021-10-12
JP7100733B2 (ja) 2022-07-13
JP2021148780A (ja) 2021-09-27
EP3882713B1 (de) 2022-09-21
US11886146B2 (en) 2024-01-30

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