EP3002636B1 - Roues coaxiales débrayables d'un mouvement horloger - Google Patents

Roues coaxiales débrayables d'un mouvement horloger Download PDF

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Publication number
EP3002636B1
EP3002636B1 EP14187570.8A EP14187570A EP3002636B1 EP 3002636 B1 EP3002636 B1 EP 3002636B1 EP 14187570 A EP14187570 A EP 14187570A EP 3002636 B1 EP3002636 B1 EP 3002636B1
Authority
EP
European Patent Office
Prior art keywords
wheel
spring
elements
wheels
hub
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
EP14187570.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3002636A1 (fr
Inventor
Daniel Gruenig
Baptist Wyssbrod
David Benjamin Kraehenbuehl
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.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
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 ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP14187570.8A priority Critical patent/EP3002636B1/fr
Priority to US14/856,841 priority patent/US9429913B2/en
Priority to CN201510633009.0A priority patent/CN105487367B/zh
Priority to CN201520764455.0U priority patent/CN205263489U/zh
Priority to JP2015195632A priority patent/JP6193949B2/ja
Publication of EP3002636A1 publication Critical patent/EP3002636A1/fr
Priority to HK16111554.7A priority patent/HK1223424A1/zh
Application granted granted Critical
Publication of EP3002636B1 publication Critical patent/EP3002636B1/fr
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
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/006—Clutch mechanism between two rotating members with transfer of movement in only one direction (free running devices)
    • G04B11/008—Clutch mechanism between two rotating members with transfer of movement in only one direction (free running devices) with friction members, e.g. click springs or jumper
    • 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
    • G04B13/021—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft
    • G04B13/023—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft allowing rotational slipping when a threshold torque is exceeded
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
    • G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
    • G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
    • G04B19/253—Driving or releasing mechanisms
    • G04B19/25306—Independent date indicating devices activated by hand or by clockwork, e.g. calendar watches
    • G04B19/25313—Independent date indicating devices activated by hand or by clockwork, e.g. calendar watches driven or released by a steady movement
    • G04B19/2532—Independent date indicating devices activated by hand or by clockwork, e.g. calendar watches driven or released by a steady movement automatically corrected at the end of mounths having less than 31 days

Definitions

  • the present invention relates to a disengageable coaxial wheel device for a watch movement.
  • the invention relates to coaxial wheels coupled by a resilient jumping member to allow disengagement of one wheel relative to the other.
  • An application consists of driving a date disc in addition to a timekeeping pointer and allowing the correction of the position of the date disc, for example when the month comprises less than 31 days.
  • Another application is for driving a display hand of a second time zone, for example the GMT (Greenwich Mean Time) and to allow the modification of the position of the hand for the second selected time zone.
  • GMT Greenwich Mean Time
  • a device with two coaxial wheels (24-hour wheel and switch) disengageable comprising positioning elements with an anchor (projecting element) which is (indirectly) pushed by a spring in projections (hollow elements), is disclosed.
  • the elastic force between the wheels is not exerted by the spring in an axial direction.
  • the known coupling system therefore has essentially three levels and provides a jumper spring which acts radially on a toothing of a third wheel.
  • the third gear defines a plurality of discrete relative angular positions for both wheels. As long as the relative torque between the two wheels is less than the clutching torque, the two wheels are integral in rotation. By applying a disengagement torque between the two wheels, the relative angular position of a desired number of steps is changed.
  • This construction is relatively bulky because the spring generally has lobes that occupy a large area to have the required elastic properties. In addition, this construction is complex and delicate because the shape of the spring is relatively complex and this spring has a thin section to have the aforementioned elastic properties required. Furthermore, the diameter of the third wheel is limited by the space required for the mounting of the radial action spring, which limits the number of jumping steps for a complete turn.
  • An object of the invention is to provide a disengageable coaxial wheel device for a watch movement that is compact, accurate and reliable over a long period of use.
  • Another object of the invention is to provide a disengageable coaxial wheel device for a watch movement that easily allows a fine adjustment of one wheel relative to the other.
  • the invention proposes to be easily adapted to various variants with steps having different angular distances.
  • the present invention relates to a detachable coaxial wheel device for a watch movement which comprises an input wheel, an output wheel, a hub, and a jumper mechanism comprising a spring and positioning elements defining a number of discrete angular positions. of the input wheel with respect to the output wheel about an axis of rotation.
  • the positioning elements comprise hollow elements and salient elements.
  • the spring is configured to apply an elastic force urging the protrusions against the hollow members to couple the wheels together below a disengaging torque.
  • the projecting elements and the hollow members extend in the axial direction and the spring is configured to apply an elastic force in the axial direction.
  • the positioning elements comprise one or more balls forming the projecting elements, the balls being housed in ball holes in the form of holes arranged in one of the exit or entry wheels, and the hollow elements are formed in one surface of the other exit or entry wheels.
  • the spring is integrally formed in one of said exit or entry wheels, and said protrusions are formed as protuberances on elastic spring arms.
  • the spring is in the form of a substantially flat or thin disc, comprising a base portion forming the central hole configured to be mounted around the hub, and an elastic portion comprising an elastic arm of which the end is configured to support the projecting member in one of said hollow members.
  • the spring is formed of a stamped metal sheet.
  • the spring comprises a fixing part with a central orifice fixed to the hub.
  • the input wheel comprises the hollow elements and the output wheel comprises or is integral with the spring.
  • a clock movement comprising a device for disengageable wheels is also described, one of the wheels of the device being engaged by a driving wheel of a motor device of the movement and the other of the wheels of the device being engaged by a device. correction wheel of a motion correction device.
  • the disengageable wheel device can further engage a drive wheel of a date disk.
  • the movement may further include a needle or other display member mounted on the hub of the disengageable wheel device.
  • part of a watch movement 2 comprises a device for disengageable wheels 10 engaged by a drive wheel 4 of a motor device (not shown) and by a correction wheel 8 of a correction device (not shown) .
  • the disengageable wheel device 10 may further engage a drive wheel 6 of a date disc (not shown).
  • the disengageable wheel device 10 comprises an input wheel 12, an output wheel 16, a hub 14, and a jumper mechanism 18.
  • a needle 3, or other display member may be mounted on the hub 14.
  • the hub 14 comprises a central hole 40, allowing the passage of one or more coaxial axes (not shown), by example for the display device hours, minutes and / or seconds.
  • the jumper mechanism 18 is configured to allow the input wheel 12 to be able to undergo a certain rotation with respect to the output wheel 16 over an angular distance defined by one or more notches by applying a relative torque between the two wheels exceeding one certain threshold, called declutching torque.
  • the input wheel 12 comprises teeth 50 engaging teeth of the motor wheel 4, the input wheel 12 being driven by the motor wheel.
  • the output wheel 16 also includes teeth 50 engaging teeth of the correction wheel 8. Alternatively, the teeth 50 of the output wheel 16 engaging teeth of a drive wheel 6 which is coupled to a disk date or other mechanism for displaying a time value.
  • the input wheel 12 comprises a central orifice 32 configured to house a section 38 of the hub 14.
  • the central orifice has a diameter slightly larger than the wheel section 38, so as to allow the free rotation of the input wheel 12 relative to the hub 14.
  • the output wheel 16 has a central orifice 52 configured to be driven or riveted to a fastening section 36 of the hub 14 so that that the output wheel 16 is integral with the hub 14. It is however possible, in one variant, to reverse this configuration, namely that the input wheel is integral with the hub and the output wheel rotatable relative to the hub in that a correction of the position of the needle 3 by the correction wheel 8 is not desired.
  • the hub 14 may be a separate part assembled to one of the wheels as in the embodiments illustrated, but it is possible, in a variant, to form the hub of a part integral with one of the wheels of entry or exit.
  • the needle 3 serves to indicate a second time zone with respect to the display of the main time of the watch movement, the indication of the time zone to be able to be changed without changing the indication of the time. main time of the watch.
  • a time zone operating on a 24-hour schedule will require 24 or more positions in a variant indicating half-hours, ie 48 positions, since in some countries there is a graduation of spindles in units smaller than the hour.
  • the second time zone may have in a variant a display 12 hours.
  • the jumper mechanism 18 comprises a spring 20 and positioning elements 22 defining a number of discrete angular positions of one wheel relative to the other wheel of the disengageable wheel device 10.
  • the spring is configured to applying an elastic force in an axial direction, the axial direction corresponding to a direction parallel to the axis of rotation A of the wheels 12, 16 of the disengageable wheel device 10.
  • the positioning elements 22 comprise hollow elements 24 and projecting elements 26, the projecting elements 26 engaging in the hollow elements 24 in an axial direction and generating, under the action of the spring 20, a securing torque of the rotating wheels.
  • a clutching torque defined, on the one hand, by the geometry of the projecting elements and hollow elements engaged in them and, on the other hand, by the axial thrust force applied by the spring 20.
  • the positioning elements can be arranged close to the periphery of the wheels 12, 16 and thus to have a diameter as large as possible for define the discrete angular positions and therefore the number of jumps or notches per revolution.
  • the spring 20 of the jumper mechanism 18 is a separate piece assembled to the output wheel 16 and made integral with this wheel.
  • the spring 20 comprises a fastening portion 44 with a central orifice 54 and riveted to the hub 14, for example on the wheel fixing portion 36 of the hub 14.
  • other forms of fixing the spring 20 to make it integral with the output wheel 16 are possible, for example by welding, gluing, crimping, or riveting.
  • the driving of the output wheel 16 and the spring 20 on the hub 14 is however advantageous because of its simplicity and the low cost of this manufacturing step.
  • the positioning elements 22 comprise one or more balls 28 housed in holes housing 30 in the form of holes disposed in the output wheel 16 and recesses 24 formed in a surface of the input wheel 12.
  • the balls 28 define therefore projecting elements 26 configured to engage in the hollow members 24 formed in the surface of the input wheel 12.
  • the number of recesses 24, formed in the surface of the input wheel and arranged circularly and regularly around the axis of rotation, defines the number of notches or relative angular positions between the output wheel and the input wheel.
  • the number of projecting elements may be greater than four.
  • the force applied to each projecting element can be reduced compared to a configuration having one, two or three protruding elements, which generally makes it possible to better control the torque of walkout.
  • the support force in the hollows of each element is reduced and consequently the impacts are reduced when the projecting element jumps from one recess and re-engages the next.
  • the spring 20 may be in the form of a flat disc, for example a disc formed of a stamped metal sheet comprising a base portion 42, forming the central hole 54 configured to be riveted to the hub 14, and a portion elastic member 46 comprising elastic arms 48 whose end is configured to bear against a ball 28.
  • the base portion of the spring can be pressed against the wheel 16, however it is also possible to have a space between the spring and wheel.
  • the spring is formed by a simple flat disc and relatively thin which bears on the balls.
  • this disc has openings for increasing its axial elastic deformation capacity.
  • the diameter of the balls 28 is greater than the thickness of the output wheel 12 so that each ball projects beyond the two major faces of this wheel to be supported on one side by the resilient arm of the spring and the other side to be housed in one of the recesses 24. It is however possible in a variant to have a ball of diameter substantially the same or less than the thickness of the output wheel, and in this case the end of the spring may include an extension configured to fit into the hole and press the ball below the surface of the wheel.
  • the bead housings in the input wheel and make the spring integral with the input wheel, mounted on the underside of the wheel 12 illustrated in FIG. Figure 2c , and to form the recesses in the output wheel 16. More generally, one can have the projecting elements mounted in the input wheel 12 and the recesses in the output wheel 16 without departing from the scope of the invention.
  • the input wheel 12 can be identical or similar to the input wheel of the first embodiment described above.
  • the output wheel 16 comprises a spring 20 and projecting elements 26, forming an integral part of the output wheel.
  • the wheel 16 may be in the form of a substantially flat or thin disc, for example a disc formed of a stamped metal sheet, the spring 20 comprising elastic arms 48 stamped into the disc.
  • the projecting elements may be made by stamping a protuberance in each arm 48 near their ends, the protuberances being configured to engage in the recesses 24 of the input wheel 12.
  • the output wheel 16 may also be driven on the hub 14 or be secured to the hub by other means such as welding, gluing or crimping. Also in this embodiment, one can have the spring arms and the projecting elements integrated in the input wheel 12 and the recesses integrated in the output wheel 16 without departing from the scope of the invention.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Micromachines (AREA)
  • Mechanical Operated Clutches (AREA)
EP14187570.8A 2014-10-02 2014-10-02 Roues coaxiales débrayables d'un mouvement horloger Active EP3002636B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP14187570.8A EP3002636B1 (fr) 2014-10-02 2014-10-02 Roues coaxiales débrayables d'un mouvement horloger
US14/856,841 US9429913B2 (en) 2014-10-02 2015-09-17 Coaxial disengageable wheels for a timepiece movement
CN201510633009.0A CN105487367B (zh) 2014-10-02 2015-09-29 用于钟表机芯的同轴的可脱开轮
CN201520764455.0U CN205263489U (zh) 2014-10-02 2015-09-29 用于钟表机芯的具有同轴的可脱开轮的机构以及钟表机芯
JP2015195632A JP6193949B2 (ja) 2014-10-02 2015-10-01 時計ムーブメント用の係合解除可能な同軸ホイール
HK16111554.7A HK1223424A1 (zh) 2014-10-02 2016-10-04 用於鐘錶機芯的同軸的可脫開輪

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14187570.8A EP3002636B1 (fr) 2014-10-02 2014-10-02 Roues coaxiales débrayables d'un mouvement horloger

Publications (2)

Publication Number Publication Date
EP3002636A1 EP3002636A1 (fr) 2016-04-06
EP3002636B1 true EP3002636B1 (fr) 2017-08-09

Family

ID=51627232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14187570.8A Active EP3002636B1 (fr) 2014-10-02 2014-10-02 Roues coaxiales débrayables d'un mouvement horloger

Country Status (5)

Country Link
US (1) US9429913B2 (zh)
EP (1) EP3002636B1 (zh)
JP (1) JP6193949B2 (zh)
CN (2) CN105487367B (zh)
HK (1) HK1223424A1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3002636B1 (fr) * 2014-10-02 2017-08-09 ETA SA Manufacture Horlogère Suisse Roues coaxiales débrayables d'un mouvement horloger
EP3220206B1 (fr) * 2016-03-16 2020-09-30 Rolex Sa Dispositif horloger de transmission
DE102018113535B4 (de) * 2018-06-06 2023-03-09 Lange Uhren Gmbh Antriebseinrichtung
EP3705949A1 (fr) * 2019-03-05 2020-09-09 ETA SA Manufacture Horlogère Suisse Mecanisme limiteur de couple d'horlogerie
EP3828644B1 (fr) * 2019-11-27 2023-12-27 ETA SA Manufacture Horlogère Suisse Mobile d'horlogerie pour mécanisme à saut semi-instantané
EP4336273A1 (fr) * 2022-09-12 2024-03-13 Patek Philippe SA Genève Dispositif de verrouillage d'un organe horloger rotatif

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
CH594925B (fr) * 1973-03-06 1978-01-31 Zenith Time Sa Dispositif d'encliquetage entre une roue des heures et une roue portant une aiguille des heures.
SU794596A1 (ru) * 1978-06-23 1981-01-07 Научно-Исследовательскийинститут Часовой Промышленности Календарное устройствоМгНОВЕННОгО дЕйСТВи
JPS55122178A (en) * 1979-03-14 1980-09-19 Ricoh Elemex Corp Hour indication correction mechanism for timepiece
JPS57199883U (zh) * 1981-06-16 1982-12-18
CN1007766B (zh) * 1984-09-04 1990-04-25 得克萨斯仪器股份有限公司 太阳能电池阵列
JPS63501318A (ja) * 1986-06-18 1988-05-19 ショーラー，マチアス 目ざまし時計
CH684619B5 (fr) * 1992-07-17 1995-05-15 Longines Montres Comp D Pièce d'horlogerie à affichage universel de l'heure.
US5636184A (en) * 1996-05-06 1997-06-03 Boyd; Daniel C. Switch for resetting an analog clock hour hand
FR2778759B1 (fr) * 1998-05-18 2000-08-04 Finance De Clairbois Bruno De Dispositif d'indication de l'heure pour de multiples fuseaux horaires
CH697221B1 (fr) * 2003-08-22 2008-07-31 Frederic Maillard Dispositif de fixation d'une extrémité de bracelet aux cornes d'une boîte de montre.
EP2015145B1 (fr) * 2007-06-11 2013-05-01 Chopard Manufacture SA Dispositif d'embrayage vertical pour pièce d'horlogerie
EP2068210A3 (fr) * 2007-12-04 2011-04-20 Chronode SA Dispositif de déclenchement
EP2626752B1 (fr) * 2012-02-08 2014-11-19 The Swatch Group Research and Development Ltd. Dispositif de détection et de synchronisation de la position d'une roue d'un mécanisme horloger
EP3002636B1 (fr) * 2014-10-02 2017-08-09 ETA SA Manufacture Horlogère Suisse Roues coaxiales débrayables d'un mouvement horloger

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
US9429913B2 (en) 2016-08-30
US20160098011A1 (en) 2016-04-07
CN205263489U (zh) 2016-05-25
CN105487367A (zh) 2016-04-13
CN105487367B (zh) 2018-04-06
EP3002636A1 (fr) 2016-04-06
JP6193949B2 (ja) 2017-09-06
JP2016075677A (ja) 2016-05-12
HK1223424A1 (zh) 2017-07-28

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