EP3769164B1 - Chronograf für eine uhr - Google Patents

Chronograf für eine uhr Download PDF

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Publication number
EP3769164B1
EP3769164B1 EP19712150.2A EP19712150A EP3769164B1 EP 3769164 B1 EP3769164 B1 EP 3769164B1 EP 19712150 A EP19712150 A EP 19712150A EP 3769164 B1 EP3769164 B1 EP 3769164B1
Authority
EP
European Patent Office
Prior art keywords
seconds
chronograph
wheel
clutch
seconds clutch
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.)
Active
Application number
EP19712150.2A
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English (en)
French (fr)
Other versions
EP3769164A1 (de
Inventor
Christophe Lyner
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.)
Hublot SA
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Hublot SA
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Publication date
Application filed by Hublot SA filed Critical Hublot SA
Publication of EP3769164A1 publication Critical patent/EP3769164A1/de
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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0823—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement
    • G04F7/0838—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement involving a tilting 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
    • 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
    • G04B35/00—Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears

Definitions

  • the invention relates to a chronograph for a watch movement.
  • the invention also relates to a watch movement and a timepiece comprising such a chronograph.
  • a timepiece chronograph usually includes a clutch to enable its operation and stopping.
  • the operation of a chronograph hand results from a complex mechanism including this clutch.
  • a first technical problem observed in existing solutions is the quavering of such a chronograph hand, due to this complex gear train.
  • a second technical problem observed in existing solutions is the starting jump of a chronograph hand, which results from the implementation of the clutch, which manifests itself by a sudden movement of the chronograph hand when the chronograph starts. . This starting jump gives the user the impression that the chronograph is malfunctioning.
  • the document EP 3 032 358 A1 describes a chronograph according to the preamble of appended claim 1.
  • This chronograph comprises a chronograph axis (reference 10) capable of carrying a chronograph second hand on which a chronograph wheel (reference 11) is mounted.
  • This chronograph also includes a seconds clutch mobile (reference 38 - Figure 4 ) comprising a seconds clutch axis (reference 72) on which are arranged a lower seconds clutch wheel (reference 68), capable of meshing with a driving seconds wheel (reference 40) of a seconds mobile a watch movement, and an upper seconds clutch wheel (reference 70).
  • the seconds clutch mobile (38) can occupy two positions by rotation around an axis of oscillation, in particular an axis parallel to the axis of the wheel 40 and/or the rocker 36, corresponding to a part to an engaged configuration of the chronograph in which the upper seconds clutch wheel (70) of the seconds clutch mobile meshes with the chronograph wheel (11) and on the other hand to a disengaged configuration in which said second wheel upper seconds clutch of the seconds clutch mobile no longer meshes with the chronograph wheel.
  • the aim of the invention is to propose a chronograph remedying the problems mentioned above and improving the solutions known from the state of the art.
  • a first object of the invention is to propose a chronograph which minimizes, or even eliminates, any chattering of a chronograph hand.
  • a second object of the invention is to propose a chronograph which minimizes, or even eliminates, the starting jump of a chronograph hand.
  • the invention relates to a chronograph for a watch movement, as defined in the appended independent claim 1.
  • the vertical direction as the direction of the axis of rotation of a needle a timepiece and a chronograph.
  • the horizontal direction is therefore perpendicular to the vertical direction.
  • a chronograph according to one embodiment of the invention is partially illustrated on the figures 1 and 2 .
  • This chronograph comprises a first member comprising a driving seconds wheel 1 secured to the seconds wheel.
  • the chronograph comprises a third member which comprises a chronograph wheel 31 intended to drive in rotation a chronograph axis 32 carrying a chronograph second hand, not shown.
  • the chronograph according to the embodiment further comprises a second intermediate member in the form of an oscillating seconds clutch mobile.
  • This seconds clutch mobile comprises a seconds clutch axis 22, which can be driven by a small amplitude rotation around a substantially horizontal axis positioned at the level of its lower pivot 23, i.e. an axis perpendicular to the the seconds clutch axis 22. Its upper pivot 24 can thus occupy two positions.
  • the seconds clutch axis 22 In a first position corresponding to the engaged configuration of the chronograph represented by the figure 1 , the seconds clutch axis 22 is inclined on a first side along a first axis C 1 relative to a vertical axis C, and in a second position corresponding to the disengaged configuration of the chronograph represented by the figure 2 , the seconds clutch axis 22 is inclined on a second opposite side along a second axis C 2 relative to the vertical axis C, its upper pivot 24 being spaced apart. As a note, the lower pivot 23 of the seconds clutch axle 22 remains fixed.
  • the seconds clutch axle 22 of the seconds clutch mobile carries two seconds clutch wheels and rotates continuously.
  • a lower seconds clutch wheel 21 meshes in permanently the seconds wheel 1 which performs one revolution per minute around its axis B.
  • An upper seconds clutch wheel 25 is intended to cooperate with the chronograph wheel 31: in the engaged configuration of the chronograph, it meshes with the chronograph wheel chronograph 31.
  • the oscillating seconds clutch mobile then drives the chronograph wheel 31 in rotation around its axis D.
  • the seconds clutch axis 22 is inclined in a direction which moves the wheel away from upper seconds clutch 25 of the chronograph wheel 31, so that their respective teeth are no longer meshed.
  • the seconds clutch shaft 22 no longer drives the chronograph wheel 31 in rotation and the chronograph second hand is not rotated.
  • the seconds clutch mobile therefore fulfills the chronograph clutch function. It can be controlled during the various functions of the chronograph (start, stop for example) by rotating the 4 seconds clutch rocker around its axis A.
  • FIG. 3 represents more particularly the upper seconds clutch wheel 25 of the seconds clutch mobile. It is positioned substantially two thirds of the height of the seconds clutch axis 22, and more generally in the upper half of the height of the seconds clutch axis 22 and more precisely from two thirds inclusive of this height, this height being measured from its lower axis of rotation.
  • this upper seconds clutch wheel 25 is a backlash wheel. It comprises teeth in the form of elastic flags 26.
  • Each elastic flag 26 is in the form of an elastic blade extending rearward relative to the direction of rotation of the wheel. Such a blade has a slight curvature, the center of curvature is positioned on the wheel side.
  • Each flag further comprises a rounded end 27.
  • This rounded end is similar to a small sphere whose center is not in the extension of the flag 26, but positioned in front of this extension.
  • These teeth in the form of elastic flags 26 with rounded end 27 cooperate with conventional triangular teeth of the chronograph wheel 31.
  • This geometry of the teeth of the upper seconds clutch wheel 25 allows it to achieve smooth engagement with the wheel chronograph, in addition to the oscillation movement or slight rotation of a few degrees of the clutch axis of 22 seconds which is favorable for smooth clutching.
  • Each end 27 takes position between two triangular teeth, its rounded shape allows it not to hit a tip of a tooth of the chronograph wheel but to be inserted by sliding between two tips of two teeth, in a continuous movement.
  • the elasticity of the flags makes it possible to engage at the bottom of the teeth to eliminate any meshing play and to absorb concentricity defects of the mobiles.
  • FIG. 4 represents more particularly the lower seconds clutch wheel 21 of the seconds clutch mobile. It is positioned substantially at a third of the height of the seconds clutch axis 22, or in the lower third inclusive of this height, and more generally in the lower half of the height of the seconds clutch axis 22 , this height being measured from its lower axis of rotation.
  • This position close to the axis of rotation induces a small amplitude movement of this lower seconds clutch wheel 21, which is similar to a slight translation. Due to this weak translation movement during the oscillation of the mobile seconds clutch, the meshing between the seconds wheel 1, which is fixed, and the lower seconds clutch wheel 21 is little disturbed and the implementation of the clutch function does not induce or almost no starting jump of the chronograph hand, unlike what would occur with a horizontal clutch of the state of the art.
  • this lower seconds clutch wheel 21 is a backlash wheel. It comprises slotted teeth 28, formed of two elastic blades distributed on either side of an opening.
  • the two seconds clutch wheels 21, 25 could have other geometries, as long as they implement the play compensation function.
  • the clearances can be taken up by elastic arms associated with the serge, the teeth can then take a conventional shape.
  • the clutch can be made with only one of the two wheels comprising teeth with backlash profiles, which would already improve the operation of the chronograph, particularly with regard to the starting jump. .
  • the chronograph according to the embodiment is intended for a watch movement and a timepiece.
  • the timepiece is for example a watch, in particular a wristwatch.
  • the timepiece may comprise a mechanical watch movement. This watch movement is for example of the manual winding type or the automatic winding type.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Claims (10)

  1. Chronograph für ein Uhrwerk, umfassend eine Chronographenachse (32), die dazu geeignet ist, einen Chronographensekundenzeiger zu tragen, auf der ein Chronographenrad (31) montiert ist, und außerdem umfassend ein Sekundenkupplungsdrehteil, das eine Sekundenkupplungsachse (22) umfasst, auf der ein unteres Sekundenkupplungsrad (21), das dazu geeignet ist, mit einem führenden Sekundenrad (1) eines Sekundendrehteil eines Uhrwerks zu kämmen, und ein oberes Sekundenkupplungsrad (25) angeordnet sind, wobei das Sekundenkupplungsdrehteil durch eine Drehung um eine Schwingungsachse zwei Positionen einnehmen kann, die einerseits einer eingekuppelten Konfiguration des Chronographen, in der das obere Sekundenkupplungsrad (25) des Sekundenkupplungsdrehteils mit dem Chronographenrad (31) kämmt, und andererseits einer ausgekuppelten Konfiguration, in der das obere Sekundenkupplungsrad (25) des Sekundenkupplungsdrehteils nicht mehr mit dem Chronographenrad (31) kämmt, entsprechen, dadurch gekennzeichnet, dass mindestens eines des oberen (25) und des unteren Sekundenkupplungsrads (21) des Sekundenkupplungsdrehteils ein Spielausgleichsrad ist und dass die Schwingungsachse senkrecht zur Sekundenkupplungsachse (22) ist und auf der Höhe des unteren Drehpunkts (23) der Sekundenkupplungsachse (22) positioniert ist, um es ihr zu ermöglichen, jeweils ihre beiden Konfigurationen, eingekuppelt bzw. ausgekuppelt, einzunehmen.
  2. Chronograph (1) nach dem vorangehenden Anspruch, dadurch gekennzeichnet, dass das obere Sekundenkupplungsrad (25) ein Spielausgleichsrad ist.
  3. Chronograph (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass sowohl das obere (25) als auch das untere Sekundenkupplungsrad (21) des Sekundenkupplungsdrehteil Spielausgleichsräder sind.
  4. Chronograph (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Sekundenkupplungsachse (22) des Sekundenkupplungsdrehteils zwischen zwei Positionen schwingt, die durch zwei Achsen (C1; C2) definiert sind, die auf beiden Seiten einer vertikalen Achse (C) verteilt sind.
  5. Chronograph (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das obere Sekundenkupplungsrad (25) in der oberen Hälfte der Höhe der Sekundenkupplungsachse (22) des Sekundenkupplungsdrehteils oder ab einschließlich zwei Dritteln dieser Höhe positioniert ist, wobei diese Höhe von ihrer Schwingungsachse aus gemessen wird, und/oder dass das untere Sekundenkupplungsrad (21) in der unteren Hälfte der Höhe der Sekundenkupplungsachse (22) des Sekundenkupplungsdrehteils oder bis einschließlich des unteren Drittels dieser Höhe positioniert ist.
  6. Chronograph (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das obere Sekundenkupplungsrad (25) fähnchenförmige Zähne (26) mit einem abgerundeten Ende (27) aufweist.
  7. Chronograph (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das untere Sekundenkupplungsrad (21) geschlitzte Zähne (28) zum Spielausgleich umfasst.
  8. Uhrwerk, dadurch gekennzeichnet, dass es einen Chronographen nach einem der vorangehenden Ansprüche umfasst.
  9. Uhrwerk nach dem vorangehenden Anspruch, dadurch gekennzeichnet, dass es ein Sekundendrehteil mit einem führenden Sekundenrad (1) umfasst, das dauerhaft mit dem unteren Sekundenkupplungsrad (21) des Sekundenkupplungsdrehteils des Chronographen kämmt.
  10. Zeitmessgerät, insbesondere Armbanduhr, dadurch gekennzeichnet, dass es einen Chronographen nach einem der Ansprüche 1 bis 7 umfasst.
EP19712150.2A 2018-03-19 2019-03-12 Chronograf für eine uhr Active EP3769164B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00347/18A CH714798B1 (fr) 2018-03-19 2018-03-19 Mécanisme de chronographe pour pièce d'horlogerie.
PCT/EP2019/056129 WO2019179824A1 (fr) 2018-03-19 2019-03-12 Chronographe pour pièce d'horlogerie

Publications (2)

Publication Number Publication Date
EP3769164A1 EP3769164A1 (de) 2021-01-27
EP3769164B1 true EP3769164B1 (de) 2023-10-25

Family

ID=61971874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19712150.2A Active EP3769164B1 (de) 2018-03-19 2019-03-12 Chronograf für eine uhr

Country Status (5)

Country Link
EP (1) EP3769164B1 (de)
JP (1) JP7269949B2 (de)
CN (1) CN112204476B (de)
CH (1) CH714798B1 (de)
WO (1) WO2019179824A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4092491A1 (de) * 2021-05-19 2022-11-23 Patek Philippe SA Genève Uhrwerk mit kupplung

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH288211A (fr) * 1950-12-15 1953-01-15 Le Coultre & Cie Mouvement de montre à chronographe.
JP2001349966A (ja) * 2001-04-09 2001-12-21 Seiko Epson Corp 指針式携帯時計
EP1288743A1 (de) * 2001-08-30 2003-03-05 Isa Swiss SA Kupplungsvorrichtung für eine Uhr
EP1316863A1 (de) * 2001-11-09 2003-06-04 Manufacture Roger Dubuis S.A. Formuhrwerk mit Chronograph
EP1445669A1 (de) * 2003-02-10 2004-08-11 Richemont International S.A. Konstantkraftvorrichtung für Uhren mit indirekter Sekunde
EP1555584A1 (de) * 2004-01-13 2005-07-20 Rolex S.A. Gezähntes Drehteil für die Einholung des Spiels, Getriebe, und die Benutzung dieses Getriebes
EP2112567B1 (de) * 2008-04-21 2016-07-13 Rolex Sa Getriebe mit Spielkompensation für Uhrmechanismus
CH708339B1 (fr) * 2013-07-04 2018-01-31 Mft La Joux-Perret Sa Pièce d'horlogerie comportant un mécanisme de seconde morte et un mécanisme de chronographe intégrés dans un mouvement de base.
CH709162B1 (fr) * 2014-01-20 2017-11-30 De Bethune Sa Dispositif d'embrayage pour mouvement horloger.
EP2945029B1 (de) * 2014-05-15 2017-05-31 Patek Philippe SA Genève Chronograph Verriegelung (Vorrichtung für Uhr)
EP3032358B1 (de) * 2014-12-12 2020-10-07 Richemont International S.A. Chronografen-Mechanismus für Uhr
EP3264199A1 (de) * 2016-07-01 2018-01-03 Montres Breguet S.A. Uhr mit schaltvorrichtung für einen uhrmechanismus

Also Published As

Publication number Publication date
JP7269949B2 (ja) 2023-05-09
CH714798B1 (fr) 2022-03-31
EP3769164A1 (de) 2021-01-27
CH714798A1 (fr) 2019-09-30
JP2021518538A (ja) 2021-08-02
WO2019179824A1 (fr) 2019-09-26
CN112204476A (zh) 2021-01-08
CN112204476B (zh) 2022-09-27

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