EP2998799A1 - Kontaktlose Rastung - Google Patents

Kontaktlose Rastung Download PDF

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Publication number
EP2998799A1
EP2998799A1 EP14185439.8A EP14185439A EP2998799A1 EP 2998799 A1 EP2998799 A1 EP 2998799A1 EP 14185439 A EP14185439 A EP 14185439A EP 2998799 A1 EP2998799 A1 EP 2998799A1
Authority
EP
European Patent Office
Prior art keywords
component
magnetic
axis
polar masses
revolution
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.)
Withdrawn
Application number
EP14185439.8A
Other languages
English (en)
French (fr)
Inventor
Fabio Sciascia
Sylvain Maréchal
Benoît LÉGERET
Alain Zaugg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Montres Breguet SA
Original Assignee
Montres Breguet 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 Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP14185439.8A priority Critical patent/EP2998799A1/de
Priority to PCT/EP2015/070003 priority patent/WO2016041772A1/fr
Publication of EP2998799A1 publication Critical patent/EP2998799A1/de
Withdrawn legal-status Critical Current

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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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/18—Constructions for connecting the ends of the mainsprings with the barrel or the arbor
    • G04B1/20—Protecting arrangements against rupture or overwinding of the mainspring located in the barrel or attached to the barrel
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/28—Adjustable guide marks or pointers for indicating determined points of time
    • G04B19/283—Adjustable guide marks or pointers for indicating determined points of time on rotatable rings, i.e. bezel

Definitions

  • the invention relates to a clockwork mechanism, comprising a first fixed or mobile component, and mobile relative to a second fixed or mobile component, and comprising means for applying a resistant force of variable intensity between a first surface said first component and a second surface of said second component.
  • the invention also relates to a movement comprising such a mechanism.
  • the invention also relates to a watch comprising such a mechanism, or such a movement.
  • the invention relates to the field of watch mechanisms, more particularly for watches, comprising mechanical braking or friction mechanisms.
  • Friction mechanisms used in watchmaking generally comprise springs.
  • the notched glasses currently used in watchmaking are based on a mechanical system that allows rotation, generally unidirectional, these glasses, blocking their movement.
  • Mechanical contacts are difficult to control because they strongly depend on the surface conditions and physical properties of the materials used. These properties themselves depend on the alloys used and heat treatments and ion implantation; the tolerances of each of the parameters make it difficult to obtain a good reproducibility.
  • the latching is generally performed by springs, which is difficult to achieve uniformly.
  • the invention proposes to improve the operation of watch crummers such as notched glasses, making it perfectly reproducible.
  • the principle of the invention is to replace, at least partially, the conventional mechanical notching, subject to wear and poor reproducibility, a non-contact notching with regular operating torque parameters.
  • the invention relates to a clockwork mechanism, comprising a first fixed or mobile component, and mobile relative to a second fixed or mobile component, and comprising means for applying a resisting force of variable intensity.
  • a clockwork mechanism comprising a first fixed or mobile component, and mobile relative to a second fixed or mobile component, and comprising means for applying a resisting force of variable intensity.
  • said first surface comprises first magnetic or ferromagnetic zones, or respectively electrified or electrostatically conductive
  • said second surface comprises second magnetic or ferromagnetic zones , or respectively electrified or electrostatically conductive
  • said first surface and / or said second surface generates magnetic fields, respectively electrostatic, of variable intensity along the interface between said first surface and said second surface on the together the mobility race of the said first component relative to said second component, said fields acting to attract or repel said second surface and / or said first surface, and generate a resistant force when applying a force to said first component relative to said second component.
  • the invention also relates to a movement comprising such a mechanism.
  • the invention also relates to a watch comprising such a mechanism, or such a movement.
  • the invention proposes to substitute, at least partially, for a conventional mechanical crushing by friction, subject to wear and poorly reproducible, a non-contact crimp with regular operating torque parameters.
  • This noncontact crimp can be achieved by the application of magnetic or electrostatic fields, the invention is more particularly illustrated for the case of magnetic fields in the form of a magnetic detent.
  • the invention then uses a system of magnets and / or ferromagnetic tracks, respectively a system of electrets and / or electrostatically conductive tracks, in order to construct a magnetic detent mechanism, respectively electrostatic, exploiting the forces induced on a magnet. immersed in a magnetic field, or respectively on an electret (or an electrified component) in an electrostatic field.
  • effort is generically referred to as a force or a couple.
  • the invention relates to a timepiece mechanism 100, comprising a fixed or movable first component 300, which is movable relative to a second fixed or movable component 200, and comprising means for applying a resistive force of variable intensity. between a first surface 30 of the first component 300 and a second surface 20 of the second component 300.
  • the first surface 30 comprises first magnetic or ferromagnetic zones, or respectively electrified or electrostatically conductive
  • the second surface 20 comprises second zones magnetic or ferromagnetic, respectively electrified or electrostatically conductive.
  • first surface 30 and / or the second surface 20 generates magnetic fields, respectively electrostatic, of variable intensity along the interface between the first surface 30 and the second surface 20 over the entire travel path of the first component 300 relative to the second component 200, these fields acting to attract or repel the second surface 20 and / or the first surface 30, and generate a resistive force when applying a force to the first component 300 relative to the second component 200.
  • the first component 300 is rotatable relative to the second component 200.
  • the first surface 30 comprises, disposed on a first revolution track, first magnetic or ferromagnetic zones, respectively electrified or electrostatically conductive.
  • the second surface 20 comprises, arranged on a second revolution track, second magnetic or ferromagnetic zones, or respectively electrified or electrostatically conductive.
  • the first surface 30 and / or the second surface 20 generates magnetic fields, respectively electrostatic, of variable intensity along its periphery, acting to attract or repel the second surface 20 and / or the first surface 30, and to generate a force resistant during a relative rotation maneuver of the first component 300 relative to the second component 200.
  • the first surface 30 comprises, regularly arranged on a first revolution track in a first step, first magnetic or ferromagnetic zones, or respectively electrified or electrostatically conductive
  • the second surface 20 comprises, regularly arranged on a second track of revolution according to a second step, second magnetic or ferromagnetic zones, respectively electrified or electrostatically conductive
  • the first surface 30 and / or the second surface 20 generates said magnetic fields, respectively electrostatic, of variable intensity along its periphery, acting to attract or repel the second surface 20 and / or the first surface 30, and generate a resistive force during a relative rotation of the first component 300 relative to the second component 200, this resulting effort being periodic with a resulting step depending on the value of the first step and the value of the second step.
  • the principle is to position magnets, or magnetic tracks on a fixed part (stator) and on a moving part (rotor) in order to exploit their interactions and create notches.
  • the Figures 1, 3 and 5 each time represent two series of magnets, face to face in the drawing, which are to fix one on the movable part 2 of the bezel (rotor) and the other on a fixed part 3 of the watch case ( stator) such as a middle part.
  • a first particular application of the invention relates to a watch case 1 with notched rotating bezel: more particularly, and as illustrated by the Figures 1 to 13 which represent non-limiting variants of the invention, the invention relates to a watch case 1 with rotating bezel 2, comprising a middle part 3 on which is pivotally mounted the bezel 2 about an axis of revolution D.
  • This case 3 comprises a first surface 30 of revolution about the axis D, which faces a second surface 20 of revolution about the axis D that includes the bezel 2.
  • the first surface 30 comprises, regularly disposed on its periphery in a first step, first magnetic or ferromagnetic zones, respectively electrified or electrostatically conductive
  • the second surface 20 comprises, regularly arranged on its periphery according to a second step, second magnetic or ferromagnetic zones, or respectively electrified or electrostatically conductive.
  • the first surface 30 and / or the second surface 20 generates magnetic fields, respectively electrostatic, of variable intensity along its periphery, acting to attract or repel the second surface 20 and / or the first surface 30, and generate a resistant force during a maneuver of relative rotation of the telescope 2 with respect to the middle part 3.
  • This resulting effort is periodic, with a resulting step whose value depends on the value of the first step and the value of the second step.
  • the first surface 30 is included in an annular volume V around the axis of revolution D on either side of a mean radius RMOY between a minimum radius RMIN and a maximum radius RMAX, and faces at the second surface 20 which is also included in the same annular volume V, the tangents to the first surface 30 and the second surface 20 having substantially the same inclination with respect to the axis of revolution D at the average radius RMOY in a plane passing through the axis of revolution D.
  • the first surface 30 includes, regularly disposed on its periphery in discrete positions according to the first pitch, first polar magnetic or electromagnetic magnetically or electrically conductive polar bodies, which are arranged to cooperate in attraction and / or repulsion with second magnetic or ferromagnetic polar bodies 4, or respectively electrified or electrostatically conductive that includes the second surface 20, regularly disposed on its periphery in discrete positions according to the second step.
  • the first polar masses 5 define the first surface 30 which is plane in a first plane P1
  • the second polar masses 4 define the second surface 20 which is plane in a second plane P2 which is parallel to the first plane P1.
  • the first polar masses 5 are all tangent to a first cone K1 about the axis D constituting the first surface 30, and the second polar masses 4 are all tangent to a second cone K2 about the axis D constituting the second surface 20, and the second cone K2 is substantially parallel to the first cone K1. More particularly, the second cone K2 is parallel to the first cone K1.
  • the first polar masses 5 are all tangent to a first cylinder C1 around the axis D constituting the first surface 30, and the second polar masses 4 are all tangent to a second cylinder C2 about the axis D constituting the second surface 20.
  • a fourth variant represented in Figures 7 and 8 derives from this third variant: the first polar masses 5 and the second polar masses 4 are distributed according to two concentric cylinders C1 and C2, and the first polar masses 5 and / or the second polar masses 4 comprise plane surfaces 41, 51, making opposite the second polar masses 4 and / or first polar masses 5, and whose normals make a non-zero angle ⁇ with the radial R from the axis D.
  • This fourth variant is well suited to a unidirectional mode of operation of the bezel, generating couples resistant of different moment according to the relative direction of rotation of the telescope 2 and the middle part 3.
  • all the first polar masses 5 have magnetization or electrification in the same direction relative to each other, or / and all the second polar masses 4 have a magnetization or an electrisation of the same direction relative to each other.
  • the advantage of the horizontal configuration of the figure 1 and magnets aligned with the figure 9 is that we generate on the telescope 2 a force in the direction ice-bottom strictly positive.
  • This configuration therefore makes it possible, by pressing the bezel 2 on the caseband 3, to solve a problem of play, either by keeping the rotor against the stator in the case of magnets in attraction, or, in the case of magnets in repulsion, by creating a magnetic cushion having the effect of reducing the irregularities of the torque by reducing contact with certain components.
  • the magnetic system can complete a traditional mechanical notching system which provides a part of the torque that is lacking.
  • the torque of mechanical origin is equivalent to 50% of the total notching torque, and the original magnetic torque provides the remaining 50% of the total torque.
  • the sliding of the plated bezel is provided by a ball bearing, or the like.
  • all first polar masses 5 are even in number and have alternating magnetization or electrification, or / and all second polar masses 4 are even in number and have alternating magnetization or electrification.
  • the force on the ice-bottom axis is zero in nominal operation, there is no shift in the ice-bottom direction between the two circles of magnets. Again, the maximum torque is greater when the magnets are alternating according to the figure 10 only when are in accordance with the figure 9 .
  • a force is induced in the ice-bottom direction. This force always tends to bring the rotor back into nominal operation if the magnets are all aligned, whereas it changes direction if they alternate (sometimes tending to bring the rotor back into nominal operation, sometimes to press it against a face of the stator) .
  • the number of magnets makes it possible to vary the number of steps of the telescope.
  • an additional solution consists in combining several rows of systems as described above, in order to multiply the induced torque. This allows for example to keep the attractions of the system with attracting magnets (sliding on one side with a horizontal configuration according to the figure 1 , and return in nominal operation with a vertical configuration according to the figure 5 ), while enjoying a torque of a moment equivalent to that obtained with a row of alternating magnets.
  • each magnet On the vertical configuration of the figure 5 , the surface of each magnet is perpendicular to the radius of the wheel.
  • Hybrid solutions can still be designed using magnets that are both alternating and aligned (in both appeal and opposition).
  • the number of first polar masses 5 is different from that of the second polar masses 4.
  • the magnetization or electrification of the first surface 30 and the second surface 20 tends to bring the telescope 2 closer to a bottom: or a bottom 6 that the middle part 3 has on the side opposite the telescope 2 as visible on the figure 11 , or an attached base 60 that carries the middle part 3 on the opposite side to the bezel 2 as visible on the figure 12 .
  • the second component 200 is rotatable about the first component 300 around an axis of revolution D, and comprises second guide means 210 which are arranged to cooperate with first guide means complementary 310 that includes the first component 3, in the vicinity of the first surface 30 and second surface 20 disposed on two surfaces of revolution coaxial with the axis D.
  • the Figures 15 and 16 illustrate a second particular application of the invention, with such a mechanism 100, which constitutes a drum barrel devoid of sliding flange.
  • the usual sliding flange is not necessary because the first component 300 and the second component 200 constitute the two coaxial parts, respectively inner and outer, of a ratchet.
  • the first component 300 carries a plurality of first polar masses 5 distributed over a first cylindrical surface C1 of axis D
  • the second component 200 carries a plurality of second polar masses 4 distributed over a second cylindrical surface C2.
  • the invention thus constitutes magnetic notches, which generate a progressive retention torque, up to a level guaranteeing the complete arming of the barrel.
  • the first surface 30 of the first component 300 and the second surface 20 of the second component 200 are slightly offset in the axial direction, of a half-thickness approximately, forming an offset in Z. And the second guide means 210 and first means complementary guide 310 are supported.
  • This construction thus eliminates the usual sliding flange, saves space for the spring in the barrel drum, and thus increases the energy that can be stored at equal external volume.
  • the invention makes it possible, again, to reduce the wear, and the reliability of the resistive torque, of magnetic origin, replacing the usual friction torque.
  • the different embodiments of the magnetic snap bezel are transposable to this second application, they are not redetaillées, to ease the presentation.
  • the figure 15 shows in particular the choice of implementation with discrete polar masses, each oriented radially south-north, both for the first polar masses 5 of the first component 300 as for the second polar masses 4 of the second component 200.
  • the invention also relates to a movement 500 comprising such a mechanism 100 ratchet in several parts.
  • the invention also relates to a watch 1000 comprising such a mechanism 100, or such a watch case 1, or such a movement 500.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
EP14185439.8A 2014-09-18 2014-09-18 Kontaktlose Rastung Withdrawn EP2998799A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14185439.8A EP2998799A1 (de) 2014-09-18 2014-09-18 Kontaktlose Rastung
PCT/EP2015/070003 WO2016041772A1 (fr) 2014-09-18 2015-09-02 Crantage sans contact

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14185439.8A EP2998799A1 (de) 2014-09-18 2014-09-18 Kontaktlose Rastung

Publications (1)

Publication Number Publication Date
EP2998799A1 true EP2998799A1 (de) 2016-03-23

Family

ID=51564564

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14185439.8A Withdrawn EP2998799A1 (de) 2014-09-18 2014-09-18 Kontaktlose Rastung

Country Status (2)

Country Link
EP (1) EP2998799A1 (de)
WO (1) WO2016041772A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3373080A1 (de) * 2017-03-06 2018-09-12 Montres Breguet S.A. Uhrwerk, das mit einer vorrichtung zur positionierung eines mobilen elements in einer vielzahl von diskreten positionen ausgestattet ist
CN114675520A (zh) * 2020-12-24 2022-06-28 宝玑表有限公司 包括旋转表圈的时计
WO2023083502A1 (fr) * 2021-11-09 2023-05-19 The Swatch Group Research And Development Ltd Dispositif de fixation magnétique de deux éléments d'une boite de montre l'un avec l'autre et boite de montre comprenant ledit dispositif de fixation

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US137437A (en) * 1873-04-01 Improvement in mainspring safety attachments for watches
GB751461A (en) * 1953-10-08 1956-06-27 Reinhard Straumann Slip coupling for the spring barrel of a self-winding timepiece
CH583430B5 (de) * 1973-11-27 1976-12-31 Suisse Horlogerie
WO2002044818A1 (fr) * 2000-12-01 2002-06-06 Tag-Heuer Sa Boîte de montre
WO2006045824A2 (fr) * 2004-10-26 2006-05-04 Tag Heuer Sa Organe reglant pour montre bracelet, et mouvement mecanique comportant un tel organe reglant
EP1930794A1 (de) * 2006-11-09 2008-06-11 The Swatch Group Research and Development Ltd. Magnetische Vorrichtung zur Betätigung einer Uhr
EP1959319A1 (de) * 2005-11-25 2008-08-20 Aniceto Jimenez Pita Magnetisch geregelte uhr
WO2011051498A1 (fr) * 2009-11-02 2011-05-05 Lvmh Swiss Manufactures Sa Organe réglant pour montre bracelet, et pièce d'horlogerie comportant un tel organe réglant
WO2011069273A1 (fr) * 2009-12-09 2011-06-16 Rolex S.A. Procédé de fabrication d'un ressort pour pièce d'horlogerie
EP2390732A1 (de) * 2010-05-27 2011-11-30 Association Suisse pour la Recherche Horlogère Zugfeder für Federhaus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US137437A (en) * 1873-04-01 Improvement in mainspring safety attachments for watches
GB751461A (en) * 1953-10-08 1956-06-27 Reinhard Straumann Slip coupling for the spring barrel of a self-winding timepiece
CH583430B5 (de) * 1973-11-27 1976-12-31 Suisse Horlogerie
WO2002044818A1 (fr) * 2000-12-01 2002-06-06 Tag-Heuer Sa Boîte de montre
WO2006045824A2 (fr) * 2004-10-26 2006-05-04 Tag Heuer Sa Organe reglant pour montre bracelet, et mouvement mecanique comportant un tel organe reglant
EP1959319A1 (de) * 2005-11-25 2008-08-20 Aniceto Jimenez Pita Magnetisch geregelte uhr
EP1930794A1 (de) * 2006-11-09 2008-06-11 The Swatch Group Research and Development Ltd. Magnetische Vorrichtung zur Betätigung einer Uhr
WO2011051498A1 (fr) * 2009-11-02 2011-05-05 Lvmh Swiss Manufactures Sa Organe réglant pour montre bracelet, et pièce d'horlogerie comportant un tel organe réglant
WO2011069273A1 (fr) * 2009-12-09 2011-06-16 Rolex S.A. Procédé de fabrication d'un ressort pour pièce d'horlogerie
EP2390732A1 (de) * 2010-05-27 2011-11-30 Association Suisse pour la Recherche Horlogère Zugfeder für Federhaus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3373080A1 (de) * 2017-03-06 2018-09-12 Montres Breguet S.A. Uhrwerk, das mit einer vorrichtung zur positionierung eines mobilen elements in einer vielzahl von diskreten positionen ausgestattet ist
US10488823B2 (en) 2017-03-06 2019-11-26 Montres Breguet S.A. Timepiece movement provided with a device for positioning a movable element in a plurality of discrete positions
CN114675520A (zh) * 2020-12-24 2022-06-28 宝玑表有限公司 包括旋转表圈的时计
EP4020100A1 (de) 2020-12-24 2022-06-29 Montres Breguet S.A. Uhr, die einen drehbaren aussenring umfasst
WO2023083502A1 (fr) * 2021-11-09 2023-05-19 The Swatch Group Research And Development Ltd Dispositif de fixation magnétique de deux éléments d'une boite de montre l'un avec l'autre et boite de montre comprenant ledit dispositif de fixation

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Publication number Publication date
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