EP4180882A1 - Indexierungsvorrichtung für einen uhrwerk - Google Patents

Indexierungsvorrichtung für einen uhrwerk Download PDF

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Publication number
EP4180882A1
EP4180882A1 EP22204904.1A EP22204904A EP4180882A1 EP 4180882 A1 EP4180882 A1 EP 4180882A1 EP 22204904 A EP22204904 A EP 22204904A EP 4180882 A1 EP4180882 A1 EP 4180882A1
Authority
EP
European Patent Office
Prior art keywords
indexing
mobile
relief
elastic arm
indication
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.)
Pending
Application number
EP22204904.1A
Other languages
English (en)
French (fr)
Inventor
Christian CHÂTELAIN
Sébastien Follonier
Thibaud Seuret
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.)
Soprod SA
Original Assignee
Soprod 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 Soprod SA filed Critical Soprod SA
Publication of EP4180882A1 publication Critical patent/EP4180882A1/de
Pending 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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • 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
    • G04B19/22—Arrangements for indicating different local apparent times; Universal time pieces
    • G04B19/23—Arrangements for indicating different local apparent times; Universal time pieces by means of additional hands or additional pairs of hands
    • G04B19/235—Arrangements for indicating different local apparent times; Universal time pieces by means of additional hands or additional pairs of hands mechanisms for correcting the additional hand or hands
    • 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
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/001—Clutch mechanism between two rotating members with transfer of movement in both directions, possibly with limitation on the transfer of power
    • G04B11/003—Clutch mechanism between two rotating members with transfer of movement in both directions, possibly with limitation on the transfer of power with friction member, e.g. with spring action
    • 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
    • G04B13/00—Gearwork
    • G04B13/002—Gearwork where rotation in one direction is changed into a stepping movement
    • 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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/025—Wheels; Pinions; Spindles; Pivots with elastic means between the toothing and the hub of a toothed 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/22—Arrangements for indicating different local apparent times; Universal time pieces
    • G04B19/23—Arrangements for indicating different local apparent times; Universal time pieces by means of additional hands or additional pairs of hands
    • 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
    • G04B27/00—Mechanical devices for setting the time indicating means
    • G04B27/005—Mechanical devices for setting the time indicating means stepwise or on determined values

Definitions

  • the present invention relates to an indexing device for a clockwork mechanism.
  • the invention also relates to a timepiece mechanism comprising at least one such indexing device as well as a timepiece, in particular a watch, comprising at least one such timepiece mechanism and/or at least one such indexing element. indexing.
  • the present invention relates to an indexing device for a display mechanism such as a second time zone display.
  • timepieces It is known in timepieces to use a coupling / indexing mechanism to allow the training and the relative adjustment of two moving parts between them, as it is for example known to use in the case of a second time zone.
  • jumping time/zone wheels consist of several boards/pinions, linked together by a star/cam constrained by a spring element (pawl).
  • pawl spring element
  • the document EP3772673 describes a clockwork indexing element cooperating coaxially with a component comprising an indexing relief defining indexing positions cooperating with a jumper spring.
  • the indexing element comprises an elastic arm capable of exerting a radial thrust force on the jumper spring.
  • the document WO2020144989 describes a mechanism for correcting jet lag comprising a star wheel of the index connected to the hour hand.
  • An indexing lever is provided in an indexing gear wheel.
  • the indexing lever comprises a jumper beak cooperating with the toothing of the star wheel.
  • the present invention relates to an indexing device comprising a first rotatable mobile about an indexing axis and intended to provide a first indication.
  • a second mobile is rotatable around the indexing axis and is intended to provide a second indication.
  • An indexing member is provided with an indexing relief defining a plurality of indexing positions and provided with peaks and valleys, the indexing member being integral with the second mobile.
  • a coupling member integral with the first mobile, cooperates with the indexing member so as to couple the first mobile with the second mobile.
  • the coupling member is provided with at least one jumper element comprising a first elastic arm terminated by an indexing part arranged to cooperate with the indexing relief for relative indexing between the indexing member and the second mobile.
  • the first elastic arm is configured to exert a substantially radial thrust force with respect to the indexing axis, on the indexing part against the indexing relief.
  • the coupling member comprises a peripheral element substantially concentric with the indexing axis and comprises at least one profile element extending towards the indexing axis.
  • the jumper element comprises a second elastic arm, extending after the part indexing and configured to cooperate with the profile element in order to exert an additional thrust force, substantially radial with respect to the indexing axis, on the indexing part against the indexing relief, the pushing force increasing when the indexing part passes from a trough to a peak.
  • the indexing device makes it possible to limit the stresses undergone by the elastic elements, for example by the first elastic arm.
  • the indexing device also makes it possible to reduce the effect of dimensional variations during production which cause variations in forces at the level of the elastic elements.
  • the thrust forces are thus more reproducible, and precise and controlled indexing between the first and the second mobile is obtained.
  • the indexing device of the invention is more reliable while offering a higher and sufficient thrust force, this in a reduced volume.
  • the indexing device 1 comprises a first mobile 10 concentric with, and rotatable around, an indexing axis A.
  • the first mobile 10 is intended to provide a first indication.
  • the first mobile 10 comprises a first toothing 11.
  • the first mobile 10 can therefore be driven, via the first toothing 11, by a mechanism not shown so as to pivot in a clockwise or counterclockwise direction so as to display the first indication, for example a first time indication.
  • the indexing device 1 comprises a second mobile 20 concentric with, and rotatable around, the indexing axis A.
  • the second mobile 20 is intended to provide a second indication.
  • the second mobile 20 comprises a second toothing 21 intended to be driven by a mechanism not shown so as to pivot in a clockwise or counterclockwise direction so as to display the second indication, for example a second time indication.
  • the second mobile 20 may comprise a barrel 22, secured to the second toothing 21 and intended to carry an indicator (not shown), for example a needle.
  • the first mobile 10 can include a gun (not shown), or the first mobile 10 can transmit the information to another indicator mobile which has a gun.
  • the first mobile 10 and the second mobile 20 can be driven so as to rotate together under normal operating conditions, while one of the mobiles 10, 20 can be driven step by step relative to the other as desired.
  • the indexing device 1 further comprises an indexing member 30.
  • the indexing member 30 is concentric with and integral with the second mobile 20 and rotates with the latter.
  • a coupling member 40 is integral with the first mobile 10 and is configured to cooperate with the indexing member 30 so as to couple the first mobile 10 with the second mobile 20.
  • FIG. 3 shows a top view of the indexing device 1 in which the second mobile 20 is absent so as to completely see the indexing member 30 and the coupling member 40.
  • the indexing member 3 is provided with an indexing relief 31 defining a plurality of indexing positions and provided with peaks 310 and valleys 311.
  • the indexing relief 31 has twelve teeth 310 so that when the second mobile 20 is driven in rotation by means of the second toothing 21, the indexing member 30 forms a sliding coupling step by step and drives the second mobile 20 by jumps, relative to the first mobile 10.
  • the indexing relief 31 can also comprise twenty-four teeth.
  • indexing relief applies to any section whose profile allows indexing.
  • a spline a toothed sector, a star, a cam allowing indexing/angular positioning, etc.
  • the coupling member 40 is provided with a peripheral element 45 secured to the first mobile 10.
  • the first mobile 10 may comprise one or more notches 12 so as to rivet the two elements.
  • Other fastening means are also possible.
  • the coupling member 40 comprises two profile elements 47, each extending towards the indexing axis A.
  • the peripheral element 45 is substantially concentric with the indexing axis A and comprises the two profile elements 47.
  • Two jumper elements 41 extend from the peripheral element 45.
  • Each jumper element 41 comprises a first elastic arm 42 terminated by an indexing part 43.
  • the indexing part 43 is arranged to cooperate with the indexing relief 31 for relative indexing between indexing member 30 and second mobile 20.
  • the first elastic arm 42 exerts a thrust force, substantially radial with respect to the indexing axis A, on the indexing relief 31.
  • each of the profile elements 47 take the form of a projection.
  • the profile elements could include other geometries such as a hollow or any shape offering support to the second elastic arm 44.
  • the two jumper elements 41 are arranged so that the indexing portion 43 cooperates with substantially diametrically opposed portions of the indexing relief 31.
  • the two profile elements 47 are also arranged substantially diametrically opposed on the peripheral element 45. D Other distributions of jumper elements 41 and profile elements 47 on peripheral element 45 are nevertheless possible.
  • the jumper element 41 further comprises a second elastic arm 44 extending after the indexing portion 43.
  • the second elastic arm 44 is configured to cooperate with the profile element 47 in order to exert a force of additional thrust, substantially radial with respect to the indexing axis A, on the indexing relief 31.
  • the additional thrust force provided by the second elastic arm 44 (as well as the thrust force provided by the first elastic arm 42) increases when the indexing part 43 passes from a hollow 311 to a crest of the tooth 310.
  • FIG. 4 And 5 show a top view of the coupling member 40 and the indexing member 30. The other components of the indexing device 1 are not shown.
  • FIG 4 illustrates the coupling member 40 when the indexing portion 43 is located in a recess 311 of the indexing relief 31.
  • the second arm elastic 44 is not in contact with the profile element 47 and only the first elastic arm 42 exerts a thrust force on the indexing portion 43.
  • the second elastic arm 44 comes into contact with the profile element 47 and exerts the additional thrust force on the indexing portion 43, in addition to the thrust force exerted by the first elastic arm 42.
  • the coupling member 40 can be configured so that a space 48 separates the second elastic arm 44 from the profile element 47, when the blade 41 is at rest (that is to say when the coupling 40 does not cooperate with the indexing member 30).
  • the space 48 is greater than the thickness of the material forming the coupling member 40.
  • the second elastic arm 44 comes into contact with the profile element 47 when the indexing portion 43 is at a predefined distance from the top of the tooth 310.
  • the second elastic arm 44 then exerts the additional thrust force before the indexing portion 43 is close to the top of the tooth 310, it that is to say once the indexing portion 43 has traveled a certain distance between the hollow 311 and the top of the tooth 310.
  • the second elastic arm 44 is arranged to always be in contact with the profile element 47 when the indexing portion 43 cooperates with the indexing relief 31.
  • the additional thrust force exerted by the second elastic arm 44 is added to the thrust force exerted by the first arm 42 when the indexing portion 43 passes from the hollow 311 to the top of the tooth 310.
  • the second elastic arm 44 may have a reverse curvature relative to the curvature of the first elastic arm 42, as illustrated in the figures 3 to 5 .
  • the second elastic arm 44 can however also have a curvature similar to that of the first elastic arm 42 or any other appropriate geometry.
  • the coupling member 40 may comprise a single jumper element 41 or more than two jumper elements 41 as well as a single profile element 47 or more than two profile elements 47.
  • the coupling member 40 can be produced by a machining process, such as chemical or plasma etching, laser machining, mechanical machining, including stamping, pressurized water machining, a lithographic process, etc
  • the coupling member 40 can be made of a metal, a metal alloy, a metalloid or even a material based on one of these.
  • Coupling member 40 can also be made from an at least partially amorphous metal or alloy.
  • the amorphous metal alloy may include a metallic glass.
  • the indexing device 1 can be used for a display mechanism such as a second time zone display.
  • the coupling member 40 is configured to drive the second mobile 20 by jumps of an entire hour.
  • the first indication can be a time indication, in particular hours, and the second indication comprises an additional time function. More particularly, the indexing device 1 can be configured so that the second indication includes a GMT time display function.
  • the acronym GMT defines the mean solar time at the Greenwich meridian.
  • the indexing device 1 can be used for any indexing system in a watch movement.
  • the indexing device 1 could also be used for a clutch system.
  • the present invention also relates to a clockwork mechanism comprising at least one such indexing device as well than a timepiece, in particular a watch, comprising at least one such timepiece mechanism and/or at least one such indexing element.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Machine Tool Positioning Apparatuses (AREA)
  • Electric Clocks (AREA)
EP22204904.1A 2021-11-12 2022-11-01 Indexierungsvorrichtung für einen uhrwerk Pending EP4180882A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH070548/2021A CH719140A1 (fr) 2021-11-12 2021-11-12 Dispositif d'indexation pour un mécanisme d'horlogerie.

Publications (1)

Publication Number Publication Date
EP4180882A1 true EP4180882A1 (de) 2023-05-17

Family

ID=84044627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22204904.1A Pending EP4180882A1 (de) 2021-11-12 2022-11-01 Indexierungsvorrichtung für einen uhrwerk

Country Status (4)

Country Link
EP (1) EP4180882A1 (de)
JP (1) JP2023072671A (de)
CN (1) CN116125776A (de)
CH (1) CH719140A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH348365A (fr) * 1958-08-15 1960-08-15 Montres Perret Et Berthoud Sa Montre
EP1895370A2 (de) * 2006-08-29 2008-03-05 Seiko Instruments Inc. Rad mit Hebelfeder für eine Uhr, Radstruktur mit Rutschmechanismus für eine Uhr, Zeitkorrekturstruktur und Uhr mit Zeitdifferenzkorrektur
WO2020144989A1 (ja) 2019-01-07 2020-07-16 シチズン時計株式会社 時差修正機構及び時差修正機構付時計
EP3772673A1 (de) 2019-08-08 2021-02-10 ETA SA Manufacture Horlogère Suisse Indexierungselement für uhren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH348365A (fr) * 1958-08-15 1960-08-15 Montres Perret Et Berthoud Sa Montre
EP1895370A2 (de) * 2006-08-29 2008-03-05 Seiko Instruments Inc. Rad mit Hebelfeder für eine Uhr, Radstruktur mit Rutschmechanismus für eine Uhr, Zeitkorrekturstruktur und Uhr mit Zeitdifferenzkorrektur
WO2020144989A1 (ja) 2019-01-07 2020-07-16 シチズン時計株式会社 時差修正機構及び時差修正機構付時計
EP3772673A1 (de) 2019-08-08 2021-02-10 ETA SA Manufacture Horlogère Suisse Indexierungselement für uhren

Also Published As

Publication number Publication date
CN116125776A (zh) 2023-05-16
CH719140A1 (fr) 2023-05-31
JP2023072671A (ja) 2023-05-24

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