EP0458175B1 - Getriebemechanismus, insbesondere für eine Uhr - Google Patents

Getriebemechanismus, insbesondere für eine Uhr Download PDF

Info

Publication number
EP0458175B1
EP0458175B1 EP91107825A EP91107825A EP0458175B1 EP 0458175 B1 EP0458175 B1 EP 0458175B1 EP 91107825 A EP91107825 A EP 91107825A EP 91107825 A EP91107825 A EP 91107825A EP 0458175 B1 EP0458175 B1 EP 0458175B1
Authority
EP
European Patent Office
Prior art keywords
wheel
cam
gear mechanism
mechanism according
rotatable wheel
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 - Lifetime
Application number
EP91107825A
Other languages
English (en)
French (fr)
Other versions
EP0458175A1 (de
Inventor
Alphonse Bron
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
Ebauchesfabrik ETA AG
Original Assignee
Ebauchesfabrik ETA AG
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 Ebauchesfabrik ETA AG, Eta SA Fabriques dEbauches filed Critical Ebauchesfabrik ETA AG
Publication of EP0458175A1 publication Critical patent/EP0458175A1/de
Application granted granted Critical
Publication of EP0458175B1 publication Critical patent/EP0458175B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • G04F7/0804—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
    • 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
    • G04B13/027—Wheels; Pinions; Spindles; Pivots planar toothing: shape and design

Definitions

  • the present invention relates to a gear mechanism, in particular for a timepiece.
  • Heart-shaped cams are very commonly used in watchmaking, especially in chronographs and are then called "chronograph heart".
  • the heart is fixed on the wheel of a chronograph counter and allows the needle of this counter to be reset to zero after the chronograph is started and stopped.
  • FIGS 1 to 4 of the accompanying drawings illustrate other constructions of heart-shaped cams of the prior art, as well as their operation.
  • the profile of the heart 1 has a point 2 and, in contrast, two rounded lateral surfaces 3 and 4, called shoulders.
  • This core has, substantially between the two shoulders 3 and 4, an orifice 5 whose axis is perpendicular to the general plane of the cam and which allows the fixing of this core on the axis 6 of the wheel 7 of a counter, for example the seconds counter or the minutes counter of a chronograph.
  • shoulders 3 and 4 can also be slightly pointed.
  • FIGs 3a to 3d illustrate a top view of the successive conventional steps of resetting a chronograph counter, using such a heart-shaped cam.
  • This reset is carried out by a hammer 8 having at one of its ends an inclined 9 and pivoting at its other end around a fixed axis 10.
  • the counter needle shown diagrammatically is fixed on the axis 6 of the wheel 7 and bears the reference 11.
  • the hammer 8 is pivoted in the direction of the arrow F until its incline 9 comes into contact with the periphery of the core 1.
  • a force can be exerted on it which is transmitted on the core 1 and, as the latter is eccentric relative to the axis 6, it pivots easily (Figure 3c), up to 'that the incline 9 comes into contact with the two shoulders 3 and 4 (see figure 3d).
  • the needle 11 is returned to its original or reference position.
  • the core 1 therefore has only the function of resetting the wheel 7 of the counter to zero. Furthermore, as already mentioned above, it is often necessary from this counter wheel 7, which is for example a seconds counter, to drive another wheel, for example that of a minute counter.
  • FIG. 4 illustrates the techniques of the prior art making it possible to drive this second counter wheel.
  • a drive finger 12 which projects beyond the profile of the cam so as to be able to mesh with an intermediate wheel 13 which in turn meshes with a second wheel.
  • counter 14 itself provided with a heart 15.
  • This drive finger fulfills an analogous function, although different, to that described in the disclosure of invention CH 197 349. In the latter document, no function for resetting a mobile to zero is provided.
  • the hammer 8 is not in contact with the heart 1 and the wheel 7 can therefore turn, also driving the wheels 13 and 14 by means of its drive finger 12.
  • the drive finger 12 makes it possible to rotate the wheels 13 and 14 by one step.
  • the wheel 13 When the chronograph is reset, the wheel 13 is moved axially out of the plane of the drive finger 12 (high position shown in phantom). The hammer 8 can then bring the wheel 7 of the second counter to zero, as explained above.
  • the drive finger 12 is placed outside the plane of the heart, to mesh with the wheel 13 and not to interfere with the action of the hammer 8. Indeed, if this drive finger 12 was placed directly on the upper face of the wheel 7 of the counter, in the same plane as the core 1, it would in some cases risk being in the path of the hammer 8 during the reset, making it impossible.
  • the heart itself has two functions, namely the classic reset function and also the function of driving other gear mobiles.
  • the construction of the mechanism is simplified by reducing the number of parts necessary to obtain the same functions and, moreover, space is gained in height since no drive finger being outside the plane of the cam n 'is necessary.
  • This last property conferred by the invention is particularly advantageous in its application to a chronograph mechanism, the height of which is always sought to be reduced as much as possible.
  • FIG. 7 illustrates a gear mechanism according to the invention applied in a chronograph mechanism.
  • the gear mechanism is mounted between a plate 20 and a bridge 22.
  • the mechanism comprises a first mobile 24 forming in this case the seconds counter and which comprises an axis 26 rotatably mounted in a barrel 28 fixed in the bridge 22.
  • On the axis 26 is mounted a toothed wheel 30 to which one can apply a motive force coming from a clockwork mechanism not shown, so as to drive the first mobile 24.
  • a heart-shaped cam 32 is integral in rotation with the wheel 30.
  • the mechanism also includes a second mobile 34 which, as will be explained below, is coupled to the first mobile 24 with a predetermined reduction ratio.
  • the gear mechanism also includes means 36 cooperating with said cam 32 to return the first mobile 24 to its initial position.
  • these means 36 comprise a hammer, articulated on the plate 20 at a location not visible in FIG. 7.
  • FIG. 6 illustrates the comparison between the profile of a conventional core 1, symmetrical, represented in dashed lines and the profile of the core 32 according to the invention, asymmetrical.
  • the heart 32 has a point 38, and two shoulders 40 and 42.
  • the heart 32 according to the invention being asymmetrical, it has a left half 44G and a right half 44D with a curvature different from that of the left half 44G.
  • the tip 38 is different from that of the conventional core 1, since it has a straight edge 46 on the left and a concave edge 48 on the right.
  • the tip 38 of the heart 32 meshes with the teeth of the second mobile 34, which here is an intermediate wheel.
  • this tip 38 is part of the profile of the cam 32 and serves as a meshing means for advancing the second mobile 34.
  • FIG. 7 shows that this second mobile can move axially so that it can be brought out of the plane of the cam 32 under the action of a blade 50 which can lift it while the hammer 36 acts on the cam 32.
  • the second mobile 34 in turn meshes with a third mobile 52 comprising an axis 54 on which are wedged a wheel 56 and a cam 58.
  • EP-A-0 451 660 of the applicant more precise description of these elements.
  • the first mobile 24 is for example a seconds counter, while the third mobile 52 is a minutes counter.
  • the reduction ratio between the two counters is then 60: 1.
  • the concave leading edge 48 of the tip 38 engages with one of the teeth 60 of the second mobile 34, for example and as shown in FIG. 5, the tooth 60a.
  • the tip 38 of the heart 32 therefore advances the tooth 60a by half a step in the anticlockwise direction to a position located between the original positions of the teeth 60a and 60b (represented in dotted lines). ).
  • the third mobile 52 is also driven in rotation and the wheel 56 moves half a step in the direction of the arrow F ′.
  • this wheel 56 is positioned by a jumper 57 which is in a stable position only when its end is placed between two teeth, of said toothed wheel 56.
  • This jumper 57 then being in an unstable position will therefore cause the wheel 56 to move half a additional step in direction F ′ to return to its stable position.
  • This rotation of the wheel 56 also causes the displacement of a half step of the mobile 34.
  • the tooth 60a then takes the initial position of the tooth 60b.
  • each rotation of a revolution of the first mobile 24 causes a rotation of the second mobile 34 by two half-steps, the movement of a first half-step being effected by the core 32 and that of the second half-step via the jumper 57.
  • the profile of the tip 38 of the cam 32 adapts perfectly to that of the end of the tooth 60, thus guaranteeing good training.
  • the first mobile 24 is then returned to the initial position, using the hammer 36, as described above with reference to FIGS. 3a to 3d. Note however that the first mobile 24 can be returned to its initial position as well by a rotation in the clockwise direction as by a rotation in the opposite direction.
  • FIG. 8 illustrates the return to the initial position in the particular case where the hammer 36 and more particularly its front tip 62, meets the concave edge 48 of the tip 38 of the heart 32.
  • F1 represents the force applied by the hammer 36 perpendicular to the surface of the concave edge 48 and that d1 is the distance from the axis 64 of rotation of the mobile 24 to the normal of F1
  • the moment M1 exerted by the hammer 36 on the core 32 is equal to F1 x d1.
  • F2 represents the force exerted by the hammer 36 perpendicular to the edge of the tip of a conventional core 1 (shown in dashed lines) and that d2 is the distance from the axis 64 to the normal of F2
  • the moment M2 equal to F2 x d2 is less than the moment M1.
  • the particular shape of the tip 38 of the heart 32 therefore improves the return to the initial position of the mobile. It will be noted that the latter then pivots counterclockwise (arrow direction F ⁇ ).
  • FIG. 9 illustrates the particular case where the hammer 36 meets the tip 38 of the heart 32.
  • the moment M1 is only slightly greater than the moment M2 but this nevertheless results in a slight improvement in the return to the initial position.
  • the mobile 24 is driven clockwise (direction F ′).
  • the tip 22 of the heart 20B could have two concave edges 48 (see FIG. 10).

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Adornments (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
  • Physical Vapour Deposition (AREA)
  • Electromechanical Clocks (AREA)
  • Gear Transmission (AREA)
  • Gears, Cams (AREA)
  • Table Equipment (AREA)
  • Measurement Of Predetermined Time Intervals (AREA)

Claims (10)

  1. Getriebemechanismus, umfassend:
    - einen ersten Trieb (24), der um eine erste Drehachse (26) umlaufen kann,
    - einen zweiten Trieb (34), der um eine zweite Drehachse umlaufen kann,
    - einen Nocken (32), der drehfest mit dem ersten Trieb verbunden ist, welcher Nocken im wesentlichen eben ist und ein Profil besitzt, das im wesentlichen die allgemeine Form eines Herzens aufweist, und
    - Mittel (36), um den ersten Trieb in eine Ausgangsposition im Zusammenwirken mit dem Nocken (32) zurückzuführen, welcher Getriebemechanismus dadurch gekennzeichnet ist, daß der Nocken (32) ein besonderes Profil aufweist in Richtung der ersten Drehachse, welches es ermöglicht, den ersten Trieb in die Ausgangsposition zurückzubringen und gleichermaßen den zweiten Trieb zur Drehung anzutreiben, um diesen mit einem vorbestimmten Untersetzungsverhältnis relativ zur Drehung des ersten Triebs umlaufen zu lassen.
  2. Getriebemechanismus nach Anspruch 1, dadurch gekennzeichnet, daß der Nocken (32) eine Spitze (38) umfaßt, die zum Antreiben des zweiten Triebes (34) zur Drehung dient und daß das Profil des Nockens derart ausgebildet ist, daß der erste Trieb (24) in die Ausgangsposition rücksetzbar ist, unabhängig von der Winkelposition des ersten Triebes (24).
  3. Getriebemechanismus nach Anspruch 2, dadurch gekennzeichnet, daß die Spitze (38) des Nockens (32) mindestens einen konkaven Rand (48) aufweist.
  4. Getriebemechanismus nach Anspruch 3, dadurch gekennzeichnet, daß der konkave Rand (48) auf der Seite der Spitze (38) vorgesehen ist, der sich vorn befindet relativ zur Drehbewegung, welche der erste Trieb (24) unter der Wirkung einer für diesen Zweck vorgesehenen Antriebskraft ausführt.
  5. Getriebemechanismus nach Anspruch 4, dadurch gekennzeichnet, daß die Spitze (38) einen konkaven Rand (48) und einen geradlinigen Rand (46) aufweist, der auf der Seite der Spitze (38) vorgesehen ist, welcher sich hinten befindet, relativ zur Bewegung, welche der erste Trieb (24) unter der Wirkung der Antriebskraft ausführt.
  6. Getriebemechanismus nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der zweite Trieb (34) axialbeweglich aus der Ebene des Nockens (32) heraus ist, um die Entkupplung desselben zu ermöglichen, wenn der erste Trieb (24) in seine Ausgangsposition rückgesetzt wird.
  7. Getriebemechanismus nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß ein Positionsanzeigeorgan drehfest mit dem ersten Trieb (24) verbunden ist.
  8. Getriebemechanismus nach Anspruch 7, dadurch gekennzeichnet, daß das Positionsanzeigeorgan ein Zeiger (59) ist.
  9. Getriebemechanismus nach Anspruch 1, dadurch gekennzeichnet, daß die mit dem Nocken (32) zusammenwirkenden Mittel zum Rücksetzen des ersten Triebes in seine Ausgangsposition einen Hammer (36) umfassen.
  10. Zeitmeßgerät, insbesondere Chronograph, mit mindestens einem Getriebemechanismus gemäß einem der vorangehenden Ansprüche.
EP91107825A 1990-05-21 1991-05-15 Getriebemechanismus, insbesondere für eine Uhr Expired - Lifetime EP0458175B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1716/90 1990-05-21
CH1716/90A CH680034B5 (de) 1990-05-21 1990-05-21

Publications (2)

Publication Number Publication Date
EP0458175A1 EP0458175A1 (de) 1991-11-27
EP0458175B1 true EP0458175B1 (de) 1994-12-21

Family

ID=4216931

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107825A Expired - Lifetime EP0458175B1 (de) 1990-05-21 1991-05-15 Getriebemechanismus, insbesondere für eine Uhr

Country Status (7)

Country Link
US (1) US5280460A (de)
EP (1) EP0458175B1 (de)
JP (1) JPH04231893A (de)
CN (1) CN1029430C (de)
CH (1) CH680034B5 (de)
DE (1) DE69106043T2 (de)
HK (1) HK1000148A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0853264A3 (de) 1997-01-10 1999-11-24 Eta SA Fabriques d'Ebauches Chronographuhr mit einem Mechanismus mit reduzierter Höhe
US6761478B2 (en) * 2001-03-21 2004-07-13 Glashütter Uhrenbetrieb GmbH Chronograph with two rotational directions
US8157815B2 (en) * 2005-05-20 2012-04-17 Neotract, Inc. Integrated handle assembly for anchor delivery system
US7758594B2 (en) * 2005-05-20 2010-07-20 Neotract, Inc. Devices, systems and methods for treating benign prostatic hyperplasia and other conditions
JP5350774B2 (ja) * 2008-12-25 2013-11-27 セイコーインスツル株式会社 クロノグラフ時計
CN108346230A (zh) * 2017-01-23 2018-07-31 深圳市祈飞科技有限公司 落杯落盖装置及饮料自动售卖机
CN111258202B (zh) * 2018-11-30 2023-09-05 天津海鸥表业集团有限公司 一种适用于手表的间歇性往复运动机构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH197349A (fr) * 1937-06-07 1938-04-30 Jacot Guyot Henri Pièce d'horlogerie.
CH223717A (de) * 1941-06-13 1942-09-30 Mido Ag Sekundenzählvorrichtung an einer Uhr.
CH678911B5 (de) * 1990-04-12 1992-05-29 Ebauchesfabrik Eta Ag

Also Published As

Publication number Publication date
CN1029430C (zh) 1995-08-02
JPH04231893A (ja) 1992-08-20
CH680034GA3 (de) 1992-06-15
DE69106043D1 (de) 1995-02-02
EP0458175A1 (de) 1991-11-27
DE69106043T2 (de) 1995-08-03
HK1000148A1 (en) 1997-12-24
US5280460A (en) 1994-01-18
CN1056755A (zh) 1991-12-04
CH680034B5 (de) 1992-12-15

Similar Documents

Publication Publication Date Title
EP0549941B1 (de) Mechanische und/oder elektromechanische Uhr mit einer automatisch zurückgehenden Anzeigevorrichtung
EP2159652A1 (de) Anzeigemechanismus für Uhr, der die Anzeige sowie das Ausblenden der aktuellen Uhrzeit ermöglicht
EP2073076A1 (de) Betätigungsmechanismus eines weckers
EP0458175B1 (de) Getriebemechanismus, insbesondere für eine Uhr
EP0987609B1 (de) Jährlicher Kalendermechanismus für Uhrwerk
EP3690556A1 (de) Uhr, die eine anzeige mit variabler teilung umfasst
EP0218926B1 (de) Vorrichtung zur schrittweisen Vorwärtsbewegung eines zeitanzeigenden Organs in einem Uhrwerk
EP0606576A1 (de) Islamitischer Kalender
CH705086B1 (fr) Mécanisme de calendrier et pièce d'horlogerie comprenant un tel mécanisme.
EP1960843B1 (de) Uhrwerk
CH713209B1 (fr) Mécanisme d'affichage pour pièce d'horlogerie.
CH691086A5 (fr) Mouvement d'horlogerie à quantième perpétuel.
CH691088A5 (fr) Mécanisme de mise à l'heure d'un mouvement d'horlogerie à quantième perpétuel.
EP1960846B1 (de) Uhrwerk
CH707439B1 (fr) Mécanisme d'affichage anti-rétrograde pour pièce d'horlogerie.
EP1316863A1 (de) Formuhrwerk mit Chronograph
CH715773B1 (fr) Système d'entraînement sécurisé, notamment pour un quantième horloger.
CH708338B1 (fr) Mécanisme correcteur pas-à-pas.
EP0079301B1 (de) Vorrichtung zum periodischen Antrieb eines sich drehenden Bestandteiles
EP2710433A1 (de) Betätigungsmechanismus für ein uhrwerk und entsprechendes uhrwerk
EP0129683A1 (de) Datumschaltwerk für Uhren
EP1353244B1 (de) Uhr mit länglichem Gehäuse
CH719977A1 (fr) Mécanisme horloger à affichage sautant
WO2024121789A1 (fr) Dispositif horloger de transformation d'une première rotation en une deuxième rotation
WO2024042385A1 (fr) Dispositif d'actionnement coordonné de deux fonctions d'une pièce d'horlogerie

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19920118

17Q First examination report despatched

Effective date: 19931215

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 69106043

Country of ref document: DE

Date of ref document: 19950202

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950301

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980420

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19980515

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980525

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990515

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990515

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000301

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST