EP0218926B1 - Dispositif d'entraînement intermittent d'un indicateur de temps - Google Patents

Dispositif d'entraînement intermittent d'un indicateur de temps Download PDF

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Publication number
EP0218926B1
EP0218926B1 EP86112624A EP86112624A EP0218926B1 EP 0218926 B1 EP0218926 B1 EP 0218926B1 EP 86112624 A EP86112624 A EP 86112624A EP 86112624 A EP86112624 A EP 86112624A EP 0218926 B1 EP0218926 B1 EP 0218926B1
Authority
EP
European Patent Office
Prior art keywords
pinion
driving
transmission assembly
teeth
finger
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.)
Expired
Application number
EP86112624A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0218926A1 (fr
Inventor
Cyril Vuilleumier
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 Fabriques dEbauches
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 Fabriques dEbauches filed Critical Eta SA Fabriques dEbauches
Publication of EP0218926A1 publication Critical patent/EP0218926A1/fr
Application granted granted Critical
Publication of EP0218926B1 publication Critical patent/EP0218926B1/fr
Expired 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
    • G04B13/002—Gearwork where rotation in one direction is changed into a stepping movement
    • G04B13/003—Gearwork where rotation in one direction is changed into a stepping movement with a step for each complete revolution
    • 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

Definitions

  • the subject of the invention is an intermittent device for driving a time indicator in a timepiece comprising a movable drive driven in continuous rotation by the movement of said piece and a transmission assembly driven in discontinuous rotation by said movable leading, said assembly in turn driving said indicator.
  • the date display is conventionally done by a disc or a crown which carries on one of its faces the numbers from 1 to 31, these numbers parading successively in front of a window arranged in the dial of the watch.
  • This indicator is rotated by the gear train, so that it advances one step every twenty-four hours.
  • Locking in each of the display positions of the date indicator is usually carried out by an elastic locking member engaging successively between the different teeth of a toothing formed on the disc or the crown as and when the indicator advance.
  • the motive force which must be applied to it is thus clearly greater than the motive force only necessary to drive the hands of the watch, since it is necessary to provide more energy to erase the elastic locking member.
  • patent GB-A-2 026 213 describes an elastic locking mechanism which is rendered inoperative during the jump of the calendar in order to reduce the energy necessary to advance it by one step.
  • This mechanism comprises a driving mobile provided on its periphery with a toothed sector and a transmission mobile provided with a first toothing capable of meshing with the toothed sector of the driving mobile and a second toothing in engagement with the toothing of the calendar.
  • a circular cam having a flat is driven on the axis of the mobile leading so that the flat part is opposite the toothed sector.
  • An elastic locking member formed by two branches is arranged so that the end of one branch presses on the cam and the end of the other branch comes into contact with the second toothing of the transmission mobile.
  • the locking member can pivot around a point located at the junction of the two branches, the spacing of which is dimensioned so that they are in elastic support on the cam and the second toothing when the date is not not trained.
  • the elastic support of one of the branches further provided with a boss, ensures the desired locking.
  • the flat of the cam comes opposite a branch and cancels the bearing force of the other branch on the second toothing.
  • the locking being rendered inoperative, the date can move freely.
  • this locking mechanism has the defect that apart from the moments when the date advances, the cam which is in permanent rotation, rubs on a branch, producing an undesirable loss of energy.
  • the applicant of the present invention has already proposed a device devoid of any elastic locking, device which is described in .the document EP-A-0 079 301 (CH-A-648 176 or US-A- 4,478,522) and which is similar to the so-called Maltese cross mechanisms which make it possible to drive in discontinuous rotation a mobile driven from a driving mobile rotating at constant speed.
  • EP-A-0 079 301 CH-A-648 176 or US-A- 4,478,522
  • Maltese cross mechanisms which make it possible to drive in discontinuous rotation a mobile driven from a driving mobile rotating at constant speed.
  • each drive phase of the driven member is followed by a immobilization phase of said member without the use of spring indexing means.
  • the immobilization means used use a plate carried by the driving member and comprising a notch in a half moon, said plate cooperating with a plate carried by the driven member and comprising four radiating arms at the end of which are fixed lugs.
  • Figures 1 to 3 show plan views of the preferred device according to the invention which essentially comprises a driving mobile 1, a transmission assembly 2 and a time indicator 3.
  • the driving mobile 1 is driven in continuous rotation in the direction of the arrow 4 by a wheel 5 shown only partially in FIG. 3. In the example chosen, the driving mobile 1 makes a revolution in twenty-four hours, the wheel 5 being engaged in a known manner with a gear returning itself with the hour wheel (not shown).
  • the transmission assembly 2 comprises a first pinion 6 and a second pinion 7 which are integral and coaxial and which have the same number of teeth (six in the construction shown), the diameter of the first pinion being smaller than the diameter of the second .
  • the transmission assembly 2 is in free rotation about an axis 8.
  • the driving mobile 1 comprises first and second means for intermittently driving one after the other the first 6 then the second 7 pinion. It also includes means for immobilizing the second pinion 7 when it is not driven.
  • the time indicator 3 is driven by the transmission assembly 2.
  • the driving mobile 1 comprises a finger 9 capable of driving a tooth of the first pinion 6, and a notch 10 formed in the periphery of a plate 11 mounted integrally and coaxially with the finger 9.
  • a side 12 of the notch 10 is capable of causing a tooth of the second pinion 7.
  • the plate 11 carries a circular rim 13 on which two teeth of the pinion 7 come to rest when the transmission assembly 2 does not is not driven, this circular rim constituting the immobilization means of which we spoke above.
  • the time indicator 3 represented here is a date ring of an inner peripheral toothing comprising in the chosen construction sixty-two teeth 14. On one of the faces of the ring are affixed numbers 15 representing the date of the month . As can be seen in Figures 1 to 3, the teeth 14 of the ring are engaged with the teeth of the small pinion 6 making up the transmission assembly 2. It will be understood that the ring could alternatively be driven by the teeth of the large pinion 7.
  • the preferred embodiment shown in the drawing also shows that the teeth of the first and second pinions forming the transmission assembly are aligned with one another and that the axis of the finger 9 is disposed in the middle of the notch 10.
  • This way of operating allows the device to operate in both directions of rotation and, taking into account the dimensions adopted for the construction shown, a rotation of 120 ° of the assembly 2 at each revolution of the mobile 1. It is clear that other arrangements are possible, for example that which would consist in placing the teeth of the small pinion 6 between the teeth of the large pinion 7. In this case, however, the angle of rotation of the assembly 2 would be reduced to 60 °.
  • FIGS. 1, 2 and 3 The operation of the device according to the invention can now be explained by following the various phases represented by FIGS. 1, 2 and 3.
  • FIG. 1 represents a phase of immobilization of the transmission assembly 2 and, consequently, of the indicator 3.
  • two teeth 16 and 17 of the large pinion 7 rest on the circular rim 13 of the driving mobile 1.
  • the indicator 3 is held in position, even if a shock is applied to the timepiece and without the aid of elastic means (jumper acting on the teeth 14 for example).
  • FIG. 3 shows the start of the second drive phase of the transmission assembly 2.
  • the finger 9 leaves the tooth 18 of the small pinion 6 and the side 12 of the notch 10 comes into contact with the tooth 21 of the large pinion 7.
  • the driving mobile drives the assembly 2 further until the tops of the teeth 21 and 22 rest and come to rest on the circular rim 13 which is found on the right of finger 9.
  • the cycle of passage from one date to the other of the calendar is finished and it is understood that the first and second pinions were driven successively, the first 6 by the finger 9 and the second 7 by the rim 12 of the notch 10.
  • This double action makes it possible to rotate the assembly 2 by a large angle.
  • the present invention is not however limited to said double action, as will appear below when FIG. 5 is discussed.
  • the transmission assembly will have rotated 120 ° while the driving mobile will have progressed by approximately 60 °, ie approximately 30 ° by the action of the finger and approximately 30 ° by the action of the side of the notch. Meanwhile, indication 3 will have progressed 360/31 degrees.
  • Figure 4 is a section along the line IV-IV of Figure 3. It does not call for specific comments except to indicate how the various elements making up the device of the invention are arranged in the thickness direction. the timepiece. It will be noted that the mechanism is supported by a plate 23 on one side of which there is a dial 24 pierced with a window 25 to cause the number 15 corresponding to the date to appear. It can be seen that the device extends over three different levels: an upper level, on the dial side, where the large pinion 7 cooperates with the plate 11, an average level where the small pinion 6 cooperates with the finger 9, and a level lower where the same small pinion 6 meshes with the teeth of the ring 3.
  • the date of the date ring 3 is updated in synchronism with a mechanism (not shown) allowing the correction of the time zone and acting on the hour hand.
  • a mechanism is described for example in the document CH-A-526,804 (US-A-3,695,035).
  • the device according to the invention consists in combining the two solutions described above to obtain a relatively fast passage time while avoiding the phenomenon of bracing.
  • a very long finger is made to act on a pinion of small diameter and, on the other hand, a pinion of large diameter is used as means of immobilizing the device on a flange circular of small diameter.
  • the driving mobile, pivoting at 50 comprises first drive means constituted by the finger 31 and immobilization means constituted by the circular rim 40.
  • the finger 31 cooperates with the pinion of small diameter 32 and the circular rim 40 cooperates with the pinion of large diameter 42.
  • Finger 31 and rim 40 form the driving mobile, small 32 and large 42 pinions form the assembly of transmission rotating at intermittent speed.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Electric Clocks (AREA)
EP86112624A 1985-09-27 1986-09-12 Dispositif d'entraînement intermittent d'un indicateur de temps Expired EP0218926B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4198/85 1985-09-27
CH419885A CH661171GA3 (enrdf_load_stackoverflow) 1985-09-27 1985-09-27

Publications (2)

Publication Number Publication Date
EP0218926A1 EP0218926A1 (fr) 1987-04-22
EP0218926B1 true EP0218926B1 (fr) 1988-11-17

Family

ID=4271621

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86112624A Expired EP0218926B1 (fr) 1985-09-27 1986-09-12 Dispositif d'entraînement intermittent d'un indicateur de temps

Country Status (6)

Country Link
US (1) US4676659A (enrdf_load_stackoverflow)
EP (1) EP0218926B1 (enrdf_load_stackoverflow)
JP (1) JPH0627880B2 (enrdf_load_stackoverflow)
CH (1) CH661171GA3 (enrdf_load_stackoverflow)
DE (1) DE3661229D1 (enrdf_load_stackoverflow)
HK (1) HK121593A (enrdf_load_stackoverflow)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2828631B2 (ja) * 1987-03-13 1998-11-25 三洋電機株式会社 超電導物質の製造方法
CH680325B5 (enrdf_load_stackoverflow) * 1991-02-25 1993-02-15 Ebauchesfabrik Eta Ag
JP2552000Y2 (ja) * 1991-05-09 1997-10-27 セイコーインスツルメンツ株式会社 表示車付アナログ時計
CH684234B5 (fr) * 1993-01-13 1995-02-15 Michel Parmigiani Calendrier musulman.
DE19882138B4 (de) * 1997-12-26 2007-05-16 Citizen Watch Co Ltd Elektronische Uhr mit Kalendervorrichtung
DE10017589A1 (de) * 2000-04-08 2001-10-11 Glashuetter Uhrenbetrieb Gmbh Kalendermechanismus für ein Uhrwerk
SG102647A1 (en) * 2000-12-22 2004-03-26 Ebauchesfabrik Eta Ag Timepiece provided with a date having a large aperture
ATE337574T1 (de) 2004-06-28 2006-09-15 Grisogono S A De Vorrichtung zur grossdatumsanzeige
US7289392B2 (en) * 2005-06-17 2007-10-30 Timex Group B.V. Date display assembly for a timepiece
DE602007005214D1 (de) 2007-01-30 2010-04-22 Longines Montres Comp D Uhr, die einen Antriebsmechanismus einer Vorrichtung zur Anzeige einer mit der Zeit zusammenhängenden Größe umfasst
JP5320370B2 (ja) * 2010-10-07 2013-10-23 セイコークロック株式会社 歯車機構及び時計
JP2012127844A (ja) * 2010-12-16 2012-07-05 Casio Comput Co Ltd 表示切替装置
JP7217161B2 (ja) * 2019-01-29 2023-02-02 セイコーインスツル株式会社 ゼネバ機構、カレンダ機構、時計用ムーブメント及び時計

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB526187A (en) * 1938-03-11 1940-09-12 Yngvar Bugge Improvements in driving members for transferring stepwise rotation to driven members
FR1460172A (fr) * 1965-11-15 1966-06-17 Chronotechna Narodni Podnik Montre à indication de la date
CH526804A (fr) * 1969-10-27 1972-04-14 Omega Brandt & Freres Sa Louis Pièce d'horlogerie
US3854280A (en) * 1974-06-10 1974-12-17 Timex Corp Mechanical digital watch
CH340575A4 (enrdf_load_stackoverflow) * 1975-03-18 1977-02-28
DE3046569A1 (de) * 1980-12-11 1982-07-15 Timex Corp., 06720 Waterbury, Conn. Datumsschaltvorrichtung fuer eine analoguhr
CH648176GA3 (enrdf_load_stackoverflow) * 1981-11-05 1985-03-15
JPS5884580U (ja) * 1981-12-03 1983-06-08 セイコーエプソン株式会社 曜送り構造
EP0129683A1 (fr) * 1983-05-31 1985-01-02 Compagnie des Montres Longines, Francillon S.A. Mécanisme de calendrier pour pièce d'horlogerie

Also Published As

Publication number Publication date
JPS6275373A (ja) 1987-04-07
CH661171GA3 (enrdf_load_stackoverflow) 1987-07-15
DE3661229D1 (en) 1988-12-22
EP0218926A1 (fr) 1987-04-22
JPH0627880B2 (ja) 1994-04-13
US4676659A (en) 1987-06-30
HK121593A (en) 1993-11-12

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