EP3059642B1 - Chronograph mechanism - Google Patents

Chronograph mechanism Download PDF

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Publication number
EP3059642B1
EP3059642B1 EP15156070.3A EP15156070A EP3059642B1 EP 3059642 B1 EP3059642 B1 EP 3059642B1 EP 15156070 A EP15156070 A EP 15156070A EP 3059642 B1 EP3059642 B1 EP 3059642B1
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EP
European Patent Office
Prior art keywords
chronograph
chronograph mechanism
leaf spring
reset
energy accumulator
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
EP15156070.3A
Other languages
German (de)
French (fr)
Other versions
EP3059642A1 (en
Inventor
Alain Zaugg
Stefan Rombach
Dominique Léchot
Jean-Philippe Rochat
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.)
Montres Breguet SA
Original Assignee
Montres Breguet 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 Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP15156070.3A priority Critical patent/EP3059642B1/en
Priority to US15/044,411 priority patent/US20160246256A1/en
Priority to JP2016028581A priority patent/JP6227030B2/en
Priority to CN201610096683.4A priority patent/CN105911844B/en
Publication of EP3059642A1 publication Critical patent/EP3059642A1/en
Application granted granted Critical
Publication of EP3059642B1 publication Critical patent/EP3059642B1/en
Priority to US16/706,344 priority patent/US11454931B2/en
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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/105—Driving mechanisms with mainspring having a form other than a helix
    • 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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/14—Mainsprings; Bridles therefor
    • 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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • 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
    • G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
    • G04B3/006—Mechanical winding up; winding up with special equipment
    • 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
    • G04F7/0866—Special arrangements
    • G04F7/0895—Special arrangements with a separate barrel for the chronograph functions

Definitions

  • the invention relates to the field of mechanical watchmaking. It relates, more particularly, an autonomous chronograph mechanism comprising its own energy accumulator, its own regulating system, and a train connecting the energy accumulator to the regulating system.
  • the present invention also relates to a timepiece comprising such a chronograph mechanism.
  • the energy can be provided by an additional barrel or other elastic means to accumulate a quantity of energy and redistribute it as a couple as constant as possible .
  • an autonomous chronograph mechanism is known from the document EP1333345 , where the energy accumulator is a cylinder.
  • the document WO2012127036 proposes the use of energy accumulator in the form of leaf spring to allow a saving of space.
  • the use of an additional barrel requires the manufacturer to provide a double movement, time and chronograph. This double movement generally poses a problem of size which requires to provide very bulky parts to receive the double movement, and ultimately unsightly.
  • the invention particularly aims to overcome the various disadvantages of known timepieces including an independent or autonomous chronograph mechanism.
  • an object of the invention is to provide a chronograph mechanism having a small footprint.
  • an object of the invention is to provide a chronograph mechanism comprising an energy accumulator having a small footprint.
  • Another object of the invention is to provide a chronograph mechanism comprising an energy accumulator for delivering a torque as constant as possible.
  • Another object of the invention is to provide a chronograph mechanism comprising an energy accumulator for adjusting the delivered torque.
  • the present invention relates to an autonomous chronograph mechanism comprising its own energy accumulator, its own regulating system and a gear train connecting the energy accumulator to the regulating system.
  • said energy accumulator is constituted by a leaf spring.
  • the energy accumulator occupies a smaller footprint than the energy accumulators traditionally used, which makes it possible to construct timepieces comprising autonomous chronograph mechanisms of lesser volume.
  • the chronograph mechanism may comprise gear drive means arranged to regulate the torque delivered by the leaf spring.
  • the driving means of the gear train may comprise a rake having an end arranged to cooperate with the leaf spring and another end arranged to cooperate with the gear train, said rake being pivotally mounted in a direction of rotation. rotation to train the gear.
  • the gear train may comprise a minute counter comprising a first toothed sector and the rake may have a toothing arranged to cooperate with said first toothed sector, the first tooth sector of the minute counter and the toothing of the rake being no concentric.
  • the non-concentric tooth system / toothed sector advantageously makes it possible to correct the lack of non-constancy of the torque delivered by the leaf spring.
  • the rake may further be pivoted in the reverse direction of rotation to zero the minute counter and arm the leaf spring at the same time.
  • the chronograph mechanism may comprise a device for adjusting the torque delivered by the leaf spring.
  • the torque adjusting device may comprise an adjustable eccentric.
  • the chronograph mechanism may comprise a mechanism for arming the energy accumulator and resetting the minutes arranged to arm the energy accumulator at the same time as resetting the minutes.
  • the chronograph mechanism may comprise a counting triggering mechanism arranged to release the regulating system when triggering the count.
  • the present invention also relates to a timepiece comprising a chronograph mechanism as described above.
  • the chronograph mechanism comprises an energy accumulator 1, a finishing gear 2, an exhaust system 3 and a control system 4 comprising a balance 4a and a hairspring 4b, said work train 2 connecting the accumulator energy 1 to the exhaust system 3 and the control system 4.
  • the chronograph mechanism including its own chronograph movement is autonomous or independent and can be used in a timepiece including its own time movement.
  • the energy accumulator is constituted by a leaf spring fixed at A on the frame.
  • the finishing gear includes a minute counter and a seconds counter so as to also constitute a chronograph counting wheel.
  • the finishing gear or chronograph counting is subsequently called in general "gear". More specifically, the gear train comprises a minute counter 5 and a seconds counter 6.
  • the minute counter 5 comprises a minute wheel having a first tooth sector 7 arranged to cooperate with the energy accumulator, as will be described in FIG. details below, and a second toothed sector 8 arranged to cooperate with the wheel.
  • the first and second toothed sectors 7, 8 are mounted permanently fixed on the axis 10 of the minute counter 5 so that they are constantly integral in rotation, including with the axis 10. No connection is provided. friction that would allow to separate angularly the axis 10 of one of the toothed sectors 7, 8 beyond a certain torque.
  • the axis 10 carries in solidarity a first minute indicator member (not shown), such as a needle, arranged to appear on the dial side.
  • a second minute indicator member 12, such as an index, is carried by the second toothed sector 8 to appear on the bottom side.
  • the seconds counter 6 comprises a seconds wheel comprising a second gear 14 arranged to cooperate with the minute counter 5 and a second wheel 16 arranged to cooperate with the regulating system 4.
  • the axis 18 of the second gate mobile integrally the second indicator member (not shown), such as a needle. The connection between the mobile seconds and its axis 18 is friction to allow these two bodies an independent angular displacement beyond a certain torque.
  • the chronograph mechanism also includes a reset mechanism including a minute reset mechanism and a second reset mechanism.
  • the seconds reset mechanism is a traditional reset mechanism by means of a core system 20 integral with the axis 18 of the seconds mobile, and a hammer (not shown) controlled by a reset pushbutton. zero 22 (cf. figure 2 ).
  • the minute reset mechanism comprises a rake 24 having an end 24a arranged to cooperate with the energy accumulator 1, as will be described hereinafter, and another end 24b having a toothing arranged to cooperate with the first toothed sector 7 of the minutes mobile.
  • the rake 24 is pivotally mounted at B on the frame, and is arranged to pivot in one direction to provide the reset functions minutes and arming of the energy accumulator, and to rotate in the other direction to ensure the drive function of the wheel, and more particularly the counting minute counter, when the chronograph mechanism is in operation.
  • the rake 24 constitutes both on the one hand the driving means of the gear train and on the other hand the mechanism for resetting the minutes and the mechanism for winding the leaf spring 1.
  • the end 24a of the rake 24 is arranged to be actuated by the free end 1a of the leaf spring 1 and rotate the rake 24 when the leaf spring 1 releases its energy and relaxes to return to his unarmed position.
  • the toothing provided at the end 24b of the rake 24 and the first tooth sector 7 of the minute counter 5 are not concentric.
  • the use of a non-concentric gear system makes it possible to correct the lack of non-constancy of the torque delivered by the leaf spring and consequently of smooth this couple to obtain a constant amplitude and a steady chronograph.
  • the chronograph mechanism comprises a torque adjusting device.
  • this torque adjusting device comprises an eccentric cam 26 adjustable by the manufacturer by means of a key.
  • the cam 26 is disposed near the end 1b of the leaf spring 1, beyond the point A, opposite the free end 1a.
  • the cam 26 is arranged so as not to be in contact with the end 1b, as shown in FIG. figure 3 .
  • the cam 26 is rotated in the direction of the arrow a as shown in FIG.
  • figure 4 in order to be in contact with the end 1b of the leaf spring 1 and to more or less rotate this end 1b around the point A in the direction of the arrow b to adjust the tension of the leaf spring 1 in its position army.
  • the assembly is then fixed by screwing.
  • the chronograph mechanism is held stationary until it is triggered by means of a counting trigger mechanism arranged to release the regulating system when the count is triggered.
  • the counting trigger mechanism comprises a first flip-flop 28 controlled by a "start" pusher 30 and provided with its jumper 31.
  • the first flip-flop 28 controls a second flip-flop 32 pivotally mounted on the frame and carrying a stop-and-balance lever 34 whose free end 34a comprises a spout arranged to cooperate with the pendulum and block until the chronograph mechanism is not triggered.
  • the second flip-flop 32 also carries an index 36 whose pivoting makes it possible to indicate the state of the chronograph.
  • the mechanism for resetting the minutes and arming the leaf spring includes, with reference to the figure 2 a lever 40 actuated by the reset pushbutton 22.
  • the lever 40 comprises a spout 40a which cooperates with the end 42a of a first latch 42, its other end cooperating with a second latch 44.
  • This second latch 44 presents an arm 44a arranged to press the end 24a of the rake 24 and rotate the rake 24 B.
  • the end 24a of the rake 24 presses on the leaf spring 1 to move and arm during that the other end 24b of the rake 24 causes the first tooth sector 7 to pivot in the reset direction of the minute counter 5.
  • the resetting of the leaf spring 1 is effected by the reset function of the minute counter 5. No other specific arming action is required.
  • a stop mechanism arranged to stop the balance 4a and the indicator organs of the chronograph mechanism to allow reading or for a dead time.
  • the reset pushbutton 22 is also a pusher for stopping the chronograph mechanism.
  • the lever 40 controlled by the pusher 22 also cooperates with the latch 32 via a pin 43 secured to said latch 32 and moving in an oblong slot 45 provided on a latch 41. The pivoting of the lever 40 causes the pivoting of the latch 32 to bring the rocker stopper 34 to the locking position of the balance 4a and stop the chronograph mechanism, without resetting.
  • the latch 41 has a nose 41a arranged to cooperate with the latch 42 and maintain its end 42a away from the spout 40a of the lever 40 until the reset function is not engaged.
  • the pivoting of the rocker 32 causes the displacement of the pin 43 to pivot the latch 41.
  • the configuration is provided so that at the end of the stop function of the chronograph, the latch 41 has rotated sufficiently to release the flip-flop 42 which then falls on the lever 40 so that the end 42a of the rocker 42 and the spout 40a of the lever 40 are locked.
  • a first pressure on the pusher 22 allows the stop of the chronograph mechanism and a second pressure on the same pusher 22 allows the resetting of the counters and the resetting of the leaf spring.
  • the gear train comprises, between the minute counter 5 and the seconds counter 6, a disengagement device arranged to kinematically link the mobile of the minutes. and the seconds mobile when counting, when the chronograph mechanism operates, and to disengage the mobile seconds of the mobile minutes when resetting the minutes.
  • This disengagement device comprises a unidirectional mechanism having a direction of rotation leading to driving the seconds counter 6 via the minute counter 5 during counting and a free direction of rotation when the chronograph mechanism is reset.
  • this unidirectional mechanism may be a ratchet wheel.
  • the disengaging device comprises a drive wheel, comprising a drive gear 46 cooperating with the second gear sector 8 of the minute counter 5 and a drive wheel 48, and a planet gear wheel 50 arranged coaxially with the axis 52 of the driving wheel and mounted rotatably about this axis 52.
  • the planet wheel 50 cooperates with the second gear 14 of the seconds counter 6.
  • Said planet wheel 50 carries 5 satellites 54, regularly distributed and mounted free in rotation.
  • the satellites 54 are arranged to cooperate with the drive wheel 48 of the drive wheel.
  • the satellites 54 are unidirectionally toothed and have an asymmetric tooth profile arranged to lock with the drive wheel 48 when it rotates in one direction during counting, and to be free in rotation when the drive wheel 48 rotates. in the opposite direction when resetting the minutes and arming the leaf spring 1.
  • the satellites 54 enable the drive wheel 50 to be driven by the driving wheel during the counting operation so as to ensure that the train is driven by the minute counter 5 to the regulating system 4 during the counting and free to rotate said planet carrier wheel 50 during the resetting of the minutes and the arming of the leaf spring 1 in order to disengage the mobile seconds mobile minutes, thus constituting another variant of unidirectional mechanism.
  • a disengagement device can be used with any type of energy accumulator and drive means, independently of the leaf spring / rake system. In particular, it could advantageously be used in the case of a winding movement with rocket.
  • the operation of the chronograph mechanism according to the invention is as follows:
  • the energy necessary for the operation of the chronograph is provided by the user during the reset of the chronograph, and more particularly during the resetting of the minutes which corresponds at the same time to the arming of the leaf spring 1.
  • the user presses the reset and winding pushbutton 22.
  • the pressing on the pushbutton 22 according to the arrow has caused the lever 40 to pivot according to the arrow b, which causes the first lever 42 to move along the arrow c, which causes the second lever 44 and its arm to tilt; 44a according to the arrow d.
  • the arm 44a presses the end 24a of the rake 24 along the arrow e, which causes the pivoting of the rake B.
  • This pivoting of the rake B causes the pivoting of the leaf spring 1 to A in order to arm it by virtue of the support of the end 24a of the rake 24 on the free end 1a of the leaf spring 1 and on the other hand the pivoting of the first gear sector 7 of the minute counter 5 driven by the toothing 24b in the direction of the arrow f.
  • the second toothed sector 8 and the axis 10 of the minute counter, being integral with the first sector 7 are driven from the same angle in order to zero the indicator organs minutes, including the index 12.
  • the second toothed sector 8 of the minute counter 5 meshes with the driving wheel 46, 48, but because of the asymmetrical toothing of the satellites 54, the rotation of the drive wheel 48 has no effect on the satellites 54 or on the planet wheel 50 which is free to rotate.
  • the seconds mobile and the rest of the train are thus isolated during the resetting of minutes thanks to this disengaging device.
  • the seconds counter When pressing the reset and arming pushbutton 22, the seconds counter has also zeroed in a known manner.
  • the count can then begin.
  • the energy is released by the leaf spring whose end 1a presses on the end 24a of the rake 24 to rotate it in B in the opposite direction to that of the reset minutes and the arming.
  • the toothing 24b drives the first toothed sector 7 and therefore the second toothed sector 8 in the opposite direction to that of the reset of the minutes and the arming.
  • the indicator organs of the minutes begin to rotate at a rate of graduation per minute.
  • the second gear sector 8 of the minute counter 5 meshes with the driving wheel 46, 48, but because of the asymmetrical toothing of the satellites 54, the said satellites 54 lock up so that the rotation of the wheel
  • the drive 48 causes rotation of the planet wheel 50, which in turn causes the seconds counter 6 to transmit the torque delivered by the leaf spring to the other elements of the train.
  • the seconds indicator will start rotating to indicate seconds.
  • the balance and the indicator organs can be stopped by a first pressure on the pusher 22 for reading or for a dead time.
  • a first pressure on the pusher 22 according to the arrow has caused the pivoting of the lever 40 according to the arrow b, which causes the movement of the latches 32 and 41 along the arrow c so as to bring the stop-balance 34 against the balance 4a to block it.
  • the indicator organs are stopped for an intermediate reading or a dead time.
  • the latch 41 has also pivoted along the arrow d to release the latch 42 which falls on the lever 40 to occupy its position for a possible reset. Pressing again on the "start" pushbutton 30 makes it possible to restart the chronograph mechanism, as described above, without resetting to zero.
  • a new first pressure on the pusher 22 makes it possible to stop the chronograph mechanism, as described above.
  • a second pressure on the pusher 22 resets the chronograph, and reset the leaf spring as already described above.
  • the chronograph mechanism according to the invention has a constant torque sufficient to function properly and represents a smaller footprint than known chronograph mechanisms. Its reset mechanism, and more particularly reset of the minutes, also provides the function of re-setting the accumulator of energy, so that no specific reset mechanism is necessary.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Transmission Devices (AREA)

Description

Domaine de l'inventionField of the invention

L'invention se rapporte au domaine de l'horlogerie mécanique. Elle concerne, plus particulièrement, un mécanisme de chronographe autonome comprenant son propre accumulateur d'énergie, son propre système réglant, et un rouage reliant l'accumulateur d'énergie au système réglant. La présente invention concerne également une pièce d'horlogerie comprenant un tel mécanisme de chronographe.The invention relates to the field of mechanical watchmaking. It relates, more particularly, an autonomous chronograph mechanism comprising its own energy accumulator, its own regulating system, and a train connecting the energy accumulator to the regulating system. The present invention also relates to a timepiece comprising such a chronograph mechanism.

Arrière-plan de l'inventionBackground of the invention

Les mécanismes de chronographe peuvent être classés en deux catégories :

  • les mécanismes de chronographe implantés sur le rouage de finissage d'une pièce d'horlogerie
  • les mécanismes de chronographe indépendants, ayant leur propre rouage de finissage, implantés dans une pièce d'horlogerie comprenant son propre mouvement de base horaire.
Chronograph mechanisms can be classified into two categories:
  • the chronograph mechanisms implanted on the finishing gear of a timepiece
  • the independent chronograph mechanisms, having their own finishing gear, located in a timepiece including its own basic time movement.

En ce qui concerne la catégorie des mécanismes de chronographe indépendants, l'énergie peut être fournie par un barillet supplémentaire ou un autre moyen élastique permettant d'accumuler une quantité d'énergie et de la redistribuer sous forme d'un couple le plus constant possible. Un tel mécanisme de chronographe autonome est connu du document EP1333345 , où l'accumulateur d'énergie est un barillet. Le document WO2012127036 , propose l'utilisation d'accumulateur d'énergie sous forme de ressort-lame pour permettre un gain de place. Toutefois l'utilisation d'un barillet supplémentaire oblige le constructeur à prévoir un double mouvement, horaire et chronographe. Ce double mouvement pose généralement un problème d'encombrement qui nécessite de prévoir des pièces très volumineuses pour recevoir le double mouvement, et finalement peu esthétiques.Regarding the category of independent chronograph mechanisms, the energy can be provided by an additional barrel or other elastic means to accumulate a quantity of energy and redistribute it as a couple as constant as possible . Such an autonomous chronograph mechanism is known from the document EP1333345 , where the energy accumulator is a cylinder. The document WO2012127036 , proposes the use of energy accumulator in the form of leaf spring to allow a saving of space. However the use of an additional barrel requires the manufacturer to provide a double movement, time and chronograph. This double movement generally poses a problem of size which requires to provide very bulky parts to receive the double movement, and ultimately unsightly.

Résumé de l'inventionSummary of the invention

L'invention a notamment pour objectif de pallier les différents inconvénients des pièces d'horlogerie connues comprenant un mécanisme de chronographe indépendant ou autonome.The invention particularly aims to overcome the various disadvantages of known timepieces including an independent or autonomous chronograph mechanism.

Plus précisément, un objectif de l'invention est de fournir un mécanisme de chronographe présentant un encombrement réduit.More specifically, an object of the invention is to provide a chronograph mechanism having a small footprint.

Plus précisément, un objectif de l'invention est de fournir un mécanisme de chronographe comprenant un accumulateur d'énergie présentant un encombrement réduit.More specifically, an object of the invention is to provide a chronograph mechanism comprising an energy accumulator having a small footprint.

Un autre objectif de l'invention est de fournir un mécanisme de chronographe comprenant un accumulateur d'énergie permettant de délivrer un couple le plus constant possible.Another object of the invention is to provide a chronograph mechanism comprising an energy accumulator for delivering a torque as constant as possible.

Un autre objectif de l'invention est de fournir un mécanisme de chronographe comprenant un accumulateur d'énergie permettant de régler le couple délivré.Another object of the invention is to provide a chronograph mechanism comprising an energy accumulator for adjusting the delivered torque.

A cet effet, la présente invention concerne un mécanisme de chronographe autonome comprenant son propre accumulateur d'énergie, son propre système réglant et un rouage reliant l'accumulateur d'énergie au système réglant.To this end, the present invention relates to an autonomous chronograph mechanism comprising its own energy accumulator, its own regulating system and a gear train connecting the energy accumulator to the regulating system.

Selon l'invention, ledit accumulateur d'énergie est constitué par un ressort-lame.According to the invention, said energy accumulator is constituted by a leaf spring.

Ainsi, l'accumulateur d'énergie occupe un encombrement plus faible que les accumulateurs d'énergie utilisés traditionnellement, ce qui permet de construire des pièces d'horlogerie comprenant des mécanismes de chronographe autonomes de moindre volume.Thus, the energy accumulator occupies a smaller footprint than the energy accumulators traditionally used, which makes it possible to construct timepieces comprising autonomous chronograph mechanisms of lesser volume.

De préférence, le mécanisme de chronographe peut comprendre des moyens d'entrainement du rouage agencés pour réguler le couple délivré par le ressort-lame.Preferably, the chronograph mechanism may comprise gear drive means arranged to regulate the torque delivered by the leaf spring.

Selon une variante de réalisation particulièrement préférée, les moyens d'entrainement du rouage peuvent comprendre un râteau présentant une extrémité agencée pour coopérer avec le ressort-lame et une autre extrémité agencée pour coopérer avec le rouage, ledit râteau étant monté pivotant dans un sens de rotation pour entrainer le rouage.According to a particularly preferred embodiment, the driving means of the gear train may comprise a rake having an end arranged to cooperate with the leaf spring and another end arranged to cooperate with the gear train, said rake being pivotally mounted in a direction of rotation. rotation to train the gear.

D'une manière avantageuse, le rouage peut comprendre un compteur de minutes comportant un premier secteur denté et le râteau peut présenter une denture agencée pour coopérer avec ledit premier secteur denté, le premier secteur denté du compteur de minutes et la denture du râteau étant non concentriques.Advantageously, the gear train may comprise a minute counter comprising a first toothed sector and the rake may have a toothing arranged to cooperate with said first toothed sector, the first tooth sector of the minute counter and the toothing of the rake being no concentric.

Le système de denture/secteur denté non concentriques permet avantageusement de corriger le défaut de non constance du couple délivré par le ressort-lame.The non-concentric tooth system / toothed sector advantageously makes it possible to correct the lack of non-constancy of the torque delivered by the leaf spring.

De préférence, le râteau peut en outre être monté pivotant dans le sens de rotation inverse pour mettre à zéro le compteur de minutes et armer le ressort-lame en même temps.Preferably, the rake may further be pivoted in the reverse direction of rotation to zero the minute counter and arm the leaf spring at the same time.

D'une manière avantageuse, le mécanisme de chronographe peut comprendre un dispositif de réglage du couple délivré par le ressort-lame.Advantageously, the chronograph mechanism may comprise a device for adjusting the torque delivered by the leaf spring.

Avantageusement, le dispositif de réglage du couple peut comprendre un excentrique réglable.Advantageously, the torque adjusting device may comprise an adjustable eccentric.

De préférence, le mécanisme de chronographe peut comprendre un mécanisme d'armage de l'accumulateur d'énergie et de remise à zéro des minutes agencé pour armer l'accumulateur d'énergie en même temps que la remise à zéro des minutes.Preferably, the chronograph mechanism may comprise a mechanism for arming the energy accumulator and resetting the minutes arranged to arm the energy accumulator at the same time as resetting the minutes.

Avantageusement, le mécanisme de chronographe peut comprendre un mécanisme de déclenchement du comptage agencé pour libérer le système réglant lors du déclenchement du comptage.Advantageously, the chronograph mechanism may comprise a counting triggering mechanism arranged to release the regulating system when triggering the count.

La présente invention concerne également une pièce d'horlogerie comprenant un mécanisme de chronographe tel que décrit ci-dessus.The present invention also relates to a timepiece comprising a chronograph mechanism as described above.

Brève description des dessinsBrief description of the drawings

D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante d'un mode de réalisation particulier de l'invention, donné à titre de simple exemple illustratif et non limitatif, et des figures annexées, parmi lesquelles :

  • la figure 1 est une vue en perspective du mécanisme de chronographe selon l'invention avant son premier démarrage,
  • la figure 2 est une vue de dessous (côté fond) du mécanisme de chronographe selon l'invention et du mécanisme d'armage du ressort-lame et de remise à zéro,
  • la figure 3 est une vue de dessus (côté cadran) du ressort-lame et des moyens de réglage du couple en position de repos,
  • la figure 4 est une vue de dessus (côté cadran) du ressort-lame et des moyens de réglage du couple en position armé,
  • la figure 5 est une vue de dessous (côté fond) du mécanisme de chronographe selon l'invention et de son mécanisme de déclenchement du comptage,
  • la figure 6 est une vue de dessous (côté fond) du mécanisme de chronographe selon l'invention et de son mécanisme d'arrêt, et
  • la figure 7 est une vue en coupe du dispositif de débrayage.
Other features and advantages of the invention will appear more clearly on reading the following description of a particular embodiment of the invention, given as a simple illustrative and nonlimiting example, and the appended figures, among which: :
  • the figure 1 is a perspective view of the chronograph mechanism according to the invention before its first start,
  • the figure 2 is a view from below (bottom side) of the chronograph mechanism according to the invention and the mechanism of arming the leaf spring and reset,
  • the figure 3 is a top view (on the dial side) of the leaf spring and means for adjusting the torque in the rest position,
  • the figure 4 is a top view (on the dial side) of the leaf spring and means for adjusting the torque in the armed position,
  • the figure 5 is a view from below (bottom side) of the chronograph mechanism according to the invention and its mechanism for triggering the counting,
  • the figure 6 is a view from below (bottom side) of the chronograph mechanism according to the invention and its stop mechanism, and
  • the figure 7 is a sectional view of the disengaging device.

Description détaillée de l'inventionDetailed description of the invention

En référence à la figure 1, le mécanisme de chronographe comprend un accumulateur d'énergie 1, un rouage de finissage 2, un système d'échappement 3 et un système réglant 4 comprenant un balancier 4a et un spiral 4b, ledit rouage de finissage 2 reliant l'accumulateur d'énergie 1 au système d'échappement 3 et au système réglant 4. Ainsi, le mécanisme de chronographe comprenant son propre mouvement chronographe est autonome ou indépendant et peut être utilisé dans une pièce d'horlogerie comprenant son propre mouvement horaire.With reference to the figure 1 , the chronograph mechanism comprises an energy accumulator 1, a finishing gear 2, an exhaust system 3 and a control system 4 comprising a balance 4a and a hairspring 4b, said work train 2 connecting the accumulator energy 1 to the exhaust system 3 and the control system 4. Thus, the chronograph mechanism including its own chronograph movement is autonomous or independent and can be used in a timepiece including its own time movement.

Selon l'invention, l'accumulateur d'énergie est constitué par un ressort-lame fixé en A sur le bâti.According to the invention, the energy accumulator is constituted by a leaf spring fixed at A on the frame.

Le rouage de finissage comprend un compteur de minutes et un compteur de secondes de manière à constituer également un rouage de comptage chronographe. Le rouage de finissage ou de comptage chronographe est appelé par la suite d'une manière générale « rouage ». Plus spécifiquement, le rouage comprend un compteur de minutes 5 et un compteur de secondes 6. Le compteur de minutes 5 comprend un mobile des minutes comportant un premier secteur denté 7 agencé pour coopérer avec l'accumulateur d'énergie, comme cela sera décrit en détails ci-après, et un deuxième secteur denté 8 agencé pour coopérer avec le rouage. Les premier et deuxième secteurs dentés 7, 8 sont montés fixes à demeure sur l'axe 10 du compteur de minutes 5 de sorte qu'ils sont constamment solidaires en rotation, y compris avec l'axe 10. Il n'est prévu aucune liaison à friction qui permettrait de désolidariser angulairement l'axe 10 de l'un des secteurs dentés 7, 8 au-delà d'un certain couple. L'axe 10 porte de manière solidaire un premier organe indicateur des minutes (non représenté), tel qu'une aiguille, agencé pour apparaitre côté cadran. Un deuxième organe indicateur des minutes 12, tel qu'un index, est porté par le deuxième secteur denté 8 pour apparaitre côté fond. Le compteur de secondes 6 comprend un mobile des secondes comportant un pignon de seconde 14 agencé pour coopérer avec le compteur de minutes 5 et une roue de seconde 16 agencée pour coopérer avec le système réglant 4. L'axe 18 du mobile des secondes porte de manière solidaire l'organe indicateur des secondes (non représenté), tel qu'une aiguille. La liaison entre le mobile des secondes et son axe 18 est à friction pour permettre à ces deux organes un déplacement angulaire indépendant au-delà d'un certain couple.The finishing gear includes a minute counter and a seconds counter so as to also constitute a chronograph counting wheel. The finishing gear or chronograph counting is subsequently called in general "gear". More specifically, the gear train comprises a minute counter 5 and a seconds counter 6. The minute counter 5 comprises a minute wheel having a first tooth sector 7 arranged to cooperate with the energy accumulator, as will be described in FIG. details below, and a second toothed sector 8 arranged to cooperate with the wheel. The first and second toothed sectors 7, 8 are mounted permanently fixed on the axis 10 of the minute counter 5 so that they are constantly integral in rotation, including with the axis 10. No connection is provided. friction that would allow to separate angularly the axis 10 of one of the toothed sectors 7, 8 beyond a certain torque. The axis 10 carries in solidarity a first minute indicator member (not shown), such as a needle, arranged to appear on the dial side. A second minute indicator member 12, such as an index, is carried by the second toothed sector 8 to appear on the bottom side. The seconds counter 6 comprises a seconds wheel comprising a second gear 14 arranged to cooperate with the minute counter 5 and a second wheel 16 arranged to cooperate with the regulating system 4. The axis 18 of the second gate mobile integrally the second indicator member (not shown), such as a needle. The connection between the mobile seconds and its axis 18 is friction to allow these two bodies an independent angular displacement beyond a certain torque.

Le mécanisme de chronographe comprend également un mécanisme de remise à zéro comprenant un mécanisme de remise à zéro des minutes et un mécanisme de remise à zéro des secondes. Le mécanisme de remise à zéro des secondes est un mécanisme traditionnel de remise à zéro au moyen d'un système de coeur 20 solidaire de l'axe 18 du mobile des secondes, et de marteau (non représenté) commandé par un poussoir de remise à zéro 22 (cf. figure 2).The chronograph mechanism also includes a reset mechanism including a minute reset mechanism and a second reset mechanism. The seconds reset mechanism is a traditional reset mechanism by means of a core system 20 integral with the axis 18 of the seconds mobile, and a hammer (not shown) controlled by a reset pushbutton. zero 22 (cf. figure 2 ).

Le mécanisme de remise à zéro des minutes comprend un râteau 24 présentant une extrémité 24a agencée pour coopérer avec l'accumulateur d'énergie 1, comme cela sera décrit ci-après, et une autre extrémité 24b présentant une denture agencée pour coopérer avec le premier secteur denté 7 du mobile des minutes. Le râteau 24 est monté pivotant en B sur le bâti, et est agencé pour pivoter dans un sens pour assurer les fonctions de remise à zéro des minutes et d'armage de l'accumulateur d'énergie, et pour pivoter dans l'autre sens pour assurer la fonction d'entrainement du rouage, et plus particulièrement du compteur de minutes lors du comptage, quand le mécanisme de chronographe est en fonctionnement. Ainsi, le râteau 24 constitue à la fois d'une part les moyens d'entrainement du rouage et d'autre part le mécanisme de remise à zéro des minutes ainsi que le mécanisme d'armage du ressort-lame 1.The minute reset mechanism comprises a rake 24 having an end 24a arranged to cooperate with the energy accumulator 1, as will be described hereinafter, and another end 24b having a toothing arranged to cooperate with the first toothed sector 7 of the minutes mobile. The rake 24 is pivotally mounted at B on the frame, and is arranged to pivot in one direction to provide the reset functions minutes and arming of the energy accumulator, and to rotate in the other direction to ensure the drive function of the wheel, and more particularly the counting minute counter, when the chronograph mechanism is in operation. Thus, the rake 24 constitutes both on the one hand the driving means of the gear train and on the other hand the mechanism for resetting the minutes and the mechanism for winding the leaf spring 1.

Pour assurer sa fonction de moyens d'entrainement du rouage, l'extrémité 24a du râteau 24 est agencée pour être actionnée par l'extrémité libre 1a du ressort-lame 1 et faire pivoter le râteau 24 lorsque le ressort-lame 1 libère son énergie et se détend pour revenir à sa position non armée.To ensure its function as a driving means of the gear train, the end 24a of the rake 24 is arranged to be actuated by the free end 1a of the leaf spring 1 and rotate the rake 24 when the leaf spring 1 releases its energy and relaxes to return to his unarmed position.

Afin de pouvoir réguler le couple délivré par le ressort-lame, la denture prévue à l'extrémité 24b du râteau 24 et le premier secteur denté 7 du compteur de minutes 5 ne sont pas concentriques. L'utilisation d'un système d'engrenages non concentriques permet de corriger le défaut de non constance du couple délivré par le ressort-lame et en conséquence de lisser ce couple pour obtenir une amplitude et une marche constantes du chronographe.In order to be able to regulate the torque delivered by the leaf spring, the toothing provided at the end 24b of the rake 24 and the first tooth sector 7 of the minute counter 5 are not concentric. The use of a non-concentric gear system makes it possible to correct the lack of non-constancy of the torque delivered by the leaf spring and consequently of smooth this couple to obtain a constant amplitude and a steady chronograph.

Afin de pouvoir régler le couple délivré par le ressort-lame, le mécanisme de chronographe comprend un dispositif de réglage du couple. En référence aux figures 3 et 4, ce dispositif de réglage du couple comprend une came excentrique 26 réglable par le constructeur au moyen d'une clé. La came 26 est disposée à proximité de l'extrémité 1b du ressort-lame 1, au-delà du point A, à l'opposé de l'extrémité libre 1a. Lors de l'assemblage du ressort-lame 1, la came 26 est disposée de manière à ne pas être en contact avec l'extrémité 1b, comme le montre la figure 3. Pour régler le couple à délivrer, la came 26 est tournée dans le sens de la flèche a comme le montre la figure 4, afin d'être en contact avec l'extrémité 1b du ressort-lame 1 et de faire pivoter plus ou moins cette extrémité 1b autour du point A dans le sens de la flèche b pour régler la tension du ressort-lame 1 dans sa position armée. L'ensemble est ensuite fixé par vissage.In order to be able to adjust the torque delivered by the leaf spring, the chronograph mechanism comprises a torque adjusting device. With reference to Figures 3 and 4 , this torque adjusting device comprises an eccentric cam 26 adjustable by the manufacturer by means of a key. The cam 26 is disposed near the end 1b of the leaf spring 1, beyond the point A, opposite the free end 1a. When assembling the leaf spring 1, the cam 26 is arranged so as not to be in contact with the end 1b, as shown in FIG. figure 3 . To adjust the torque to be delivered, the cam 26 is rotated in the direction of the arrow a as shown in FIG. figure 4 in order to be in contact with the end 1b of the leaf spring 1 and to more or less rotate this end 1b around the point A in the direction of the arrow b to adjust the tension of the leaf spring 1 in its position army. The assembly is then fixed by screwing.

Le mécanisme de chronographe est maintenu à l'arrêt tant qu'il n'est pas déclenché au moyen d'un mécanisme de déclenchement du comptage agencé pour libérer le système réglant lors du déclenchement du comptage. En référence à la figure 5, le mécanisme de déclenchement du comptage comprend une première bascule 28 commandée par un poussoir « start » 30 et pourvue de son sautoir 31. La première bascule 28 commande une deuxième bascule 32 montée pivotante en C sur le bâti et portant un levier stop-balancier 34 dont l'extrémité libre 34a comprend un bec agencé pour coopérer avec le balancier et le bloquer tant que le mécanisme de chronographe n'est pas déclenché. La deuxième bascule 32 porte également un index 36 dont le pivotement permet d'indiquer l'état du chronographe.The chronograph mechanism is held stationary until it is triggered by means of a counting trigger mechanism arranged to release the regulating system when the count is triggered. With reference to the figure 5 , the counting trigger mechanism comprises a first flip-flop 28 controlled by a "start" pusher 30 and provided with its jumper 31. The first flip-flop 28 controls a second flip-flop 32 pivotally mounted on the frame and carrying a stop-and-balance lever 34 whose free end 34a comprises a spout arranged to cooperate with the pendulum and block until the chronograph mechanism is not triggered. The second flip-flop 32 also carries an index 36 whose pivoting makes it possible to indicate the state of the chronograph.

Pour assurer en même temps la fonction de remise à zéro des minutes et la fonction d'armage du ressort-lame 1 du râteau 24, le mécanisme de remise à zéro des minutes et d'armage du ressort-lame, comprend, en référence à la figure 2, un levier 40 actionné par le poussoir de remise à zéro 22. Le levier 40 comprend un bec 40a qui coopère avec l'extrémité 42a d'une première bascule 42, son autre extrémité coopérant avec une deuxième bascule 44. Cette deuxième bascule 44 présente un bras 44a agencé pour appuyer sur l'extrémité 24a du râteau 24 et faire pivoter le râteau 24 en B. Lors de ce pivotement, l'extrémité 24a du râteau 24 appuie sur le ressort-lame 1 pour le déplacer et l'armer pendant que l'autre extrémité 24b du râteau 24 entraine le pivotement du premier secteur denté 7 dans le sens de remise à zéro du compteur de minutes 5. Ainsi, le réarmage du ressort-lame 1 s'effectue par la fonction de remise à zéro du compteur de minutes 5. Aucune autre action d'armage spécifique n'est demandée.To ensure at the same time the function of resetting the minutes and the arming function of the leaf spring 1 of the rake 24, the mechanism for resetting the minutes and arming the leaf spring, includes, with reference to the figure 2 a lever 40 actuated by the reset pushbutton 22. The lever 40 comprises a spout 40a which cooperates with the end 42a of a first latch 42, its other end cooperating with a second latch 44. This second latch 44 presents an arm 44a arranged to press the end 24a of the rake 24 and rotate the rake 24 B. At this pivoting, the end 24a of the rake 24 presses on the leaf spring 1 to move and arm during that the other end 24b of the rake 24 causes the first tooth sector 7 to pivot in the reset direction of the minute counter 5. Thus, the resetting of the leaf spring 1 is effected by the reset function of the minute counter 5. No other specific arming action is required.

Pour assurer la fonction d'arrêt du mécanisme de chronographe, il est prévu un mécanisme d'arrêt agencé pour stopper le balancier 4a et les organes indicateurs du mécanisme de chronographe afin de permettre une lecture ou pour un temps mort. A cet effet, le poussoir de remise à zéro 22 est également un poussoir d'arrêt du mécanisme de chronographe. En référence à la figure 6, le levier 40 commandé par le poussoir 22 coopère également avec la bascule 32 via une goupille 43 solidaire de ladite bascule 32 et se déplaçant dans une lumière oblongue 45 prévue sur une bascule 41. Le pivotement du levier 40 entraine le pivotement de la bascule 32 afin de ramener le stop-balancier 34 en position de blocage du balancier 4a et d'arrêter le mécanisme de chronographe, sans remise à zéro.To ensure the stop function of the chronograph mechanism, there is provided a stop mechanism arranged to stop the balance 4a and the indicator organs of the chronograph mechanism to allow reading or for a dead time. For this purpose, the reset pushbutton 22 is also a pusher for stopping the chronograph mechanism. With reference to the figure 6 , the lever 40 controlled by the pusher 22 also cooperates with the latch 32 via a pin 43 secured to said latch 32 and moving in an oblong slot 45 provided on a latch 41. The pivoting of the lever 40 causes the pivoting of the latch 32 to bring the rocker stopper 34 to the locking position of the balance 4a and stop the chronograph mechanism, without resetting.

La bascule 41 comporte un nez 41a agencé pour coopérer avec la bascule 42 et maintenir son extrémité 42a éloignée du bec 40a du levier 40 tant que la fonction de remise à zéro n'est pas enclenchée. Le pivotement de la bascule 32 entraine le déplacement de la goupille 43 pour faire pivoter la bascule 41. La configuration est prévue de sorte qu'en fin de fonction d'arrêt du chronographe, la bascule 41 a suffisamment pivoté pour libérer la bascule 42 qui tombe alors sur le levier 40 pour que l'extrémité 42a de la bascule 42 et le bec 40a du levier 40 soient verrouillés.The latch 41 has a nose 41a arranged to cooperate with the latch 42 and maintain its end 42a away from the spout 40a of the lever 40 until the reset function is not engaged. The pivoting of the rocker 32 causes the displacement of the pin 43 to pivot the latch 41. The configuration is provided so that at the end of the stop function of the chronograph, the latch 41 has rotated sufficiently to release the flip-flop 42 which then falls on the lever 40 so that the end 42a of the rocker 42 and the spout 40a of the lever 40 are locked.

Ainsi, une première pression sur le poussoir 22 permet l'arrêt du mécanisme de chronographe et une seconde pression sur ce même poussoir 22 permet la remise à zéro des compteurs ainsi que le réarmage du ressort-lame.Thus, a first pressure on the pusher 22 allows the stop of the chronograph mechanism and a second pressure on the same pusher 22 allows the resetting of the counters and the resetting of the leaf spring.

Pour permettre d'isoler le mobile de seconde lors de la remise à zéro du compteur de minutes 5, le rouage comprend, entre le compteur de minutes 5 et le compteur de secondes 6, un dispositif de débrayage agencé pour lier cinématiquement le mobile des minutes et le mobile des secondes lors du comptage, lorsque le mécanisme de chronographe fonctionne, et pour débrayer le mobile des secondes du mobile des minutes lors de la remise à zéro des minutes. Ce dispositif de débrayage comprend un mécanisme unidirectionnel présentant un sens de rotation entrainant pour entrainer le compteur de secondes 6 via le compteur de minutes 5 lors du comptage et un sens de rotation libre lors de la remise à zéro du mécanisme de chronographe. Selon une variante de réalisation non représentée, ce mécanisme unidirectionnel peut être une roue à cliquet.To enable the mobile to be isolated from the second when the minute counter 5 is reset, the gear train comprises, between the minute counter 5 and the seconds counter 6, a disengagement device arranged to kinematically link the mobile of the minutes. and the seconds mobile when counting, when the chronograph mechanism operates, and to disengage the mobile seconds of the mobile minutes when resetting the minutes. This disengagement device comprises a unidirectional mechanism having a direction of rotation leading to driving the seconds counter 6 via the minute counter 5 during counting and a free direction of rotation when the chronograph mechanism is reset. According to an alternative embodiment not shown, this unidirectional mechanism may be a ratchet wheel.

Selon une autre variante de réalisation représentée plus particulièrement en référence aux figures 1, 5 et 7, le dispositif de débrayage comprend un mobile d'entrainement, comportant un pignon d'entrainement 46 coopérant avec le deuxième secteur denté 8 du compteur de minutes 5 et une roue d'entrainement 48, et une roue porte-satellite 50 disposée coaxialement à l'axe 52 du mobile d'entrainement et montée mobile en rotation autour de cet axe 52. La roue porte-satellite 50 coopère avec le pignon de seconde 14 du compteur de secondes 6. Ladite roue porte-satellite 50 porte 5 satellites 54, régulièrement répartis et montés libres en rotation. Les satellites 54 sont agencés pour coopérer avec la roue d'entrainement 48 du mobile d'entrainement.According to another variant embodiment shown more particularly with reference to figures 1 , 5 and 7 , the disengaging device comprises a drive wheel, comprising a drive gear 46 cooperating with the second gear sector 8 of the minute counter 5 and a drive wheel 48, and a planet gear wheel 50 arranged coaxially with the axis 52 of the driving wheel and mounted rotatably about this axis 52. The planet wheel 50 cooperates with the second gear 14 of the seconds counter 6. Said planet wheel 50 carries 5 satellites 54, regularly distributed and mounted free in rotation. The satellites 54 are arranged to cooperate with the drive wheel 48 of the drive wheel.

Les satellites 54 sont à denture unidirectionnelle et présentent un profil de denture asymétrique agencé pour se bloquer avec la roue d'entrainement 48 lorsqu'elle tourne dans un sens lors du comptage, et pour être libres en rotation lorsque la roue d'entrainement 48 tourne dans le sens inverse lors de la remise à zéro des minutes et de l'armage du ressort-lame 1.The satellites 54 are unidirectionally toothed and have an asymmetric tooth profile arranged to lock with the drive wheel 48 when it rotates in one direction during counting, and to be free in rotation when the drive wheel 48 rotates. in the opposite direction when resetting the minutes and arming the leaf spring 1.

Ainsi, les satellites 54 permettent l'entrainement de la roue porte-satellite 50 par le mobile d'entrainement lors du comptage afin d'assurer l'entrainement du rouage par le compteur de minutes 5 jusqu'au système réglant 4 lors du comptage et laissent libre en rotation ladite roue porte-satellite 50 lors de la remise à zéro des minutes et de l'armage du ressort-lame 1 afin de débrayer le mobile des secondes du mobile des minutes, constituant ainsi une autre variante de mécanisme unidirectionnel. Un tel dispositif de débrayage peut être utilisé avec tout type d'accumulateur d'énergie et de moyens d'entrainement, indépendamment du système ressort-lame / râteau. Notamment, il pourrait avantageusement être utilisé dans le cas d'un remontage de mouvement avec fusée.Thus, the satellites 54 enable the drive wheel 50 to be driven by the driving wheel during the counting operation so as to ensure that the train is driven by the minute counter 5 to the regulating system 4 during the counting and free to rotate said planet carrier wheel 50 during the resetting of the minutes and the arming of the leaf spring 1 in order to disengage the mobile seconds mobile minutes, thus constituting another variant of unidirectional mechanism. Such a disengagement device can be used with any type of energy accumulator and drive means, independently of the leaf spring / rake system. In particular, it could advantageously be used in the case of a winding movement with rocket.

Le fonctionnement du mécanisme de chronographe selon l'invention est le suivant :
L'énergie nécessaire au fonctionnement du chronographe est fournie par l'utilisateur lors de la remise à zéro du chronographe, et plus particulièrement lors de la remise à zéro des minutes qui correspond en même temps à l'armage du ressort-lame 1. Pour cela, l'utilisateur appuie sur le poussoir de remise à zéro et d'armage 22. Comme le montre la figure 2, l'appui sur le poussoir 22 selon la flèche a entraine le pivotement du levier 40 selon la flèche b, qui entraine le déplacement de la première bascule 42 selon la flèche c, qui entraine le basculement de la deuxième bascule 44 et de son bras 44a selon la flèche d. Lors de ce basculement, le bras 44a appuie sur l'extrémité 24a du râteau 24 selon la flèche e, ce qui entraine le pivotement du râteau en B. Ce pivotement du râteau en B entraine d'une part le pivotement en A du ressort-lame 1 pour l'armer du fait de l'appui de l'extrémité 24 a du râteau 24 sur l'extrémité libre 1a du ressort-lame 1 et d'autre part le pivotement du premier secteur denté 7 du compteur de minute 5 entrainé par la denture 24b dans le sens de la flèche f. Le deuxième secteur denté 8 et l'axe 10 du compteur de minutes, étant solidaires du premier secteur 7 sont entrainés du même angle afin de mettre à zéro les organes indicateurs des minutes, et notamment l'index 12. Lors de sa rotation, le deuxième secteur denté 8 du compteur de minutes 5 engrène avec le mobile d'entrainement 46, 48, mais du fait de la denture asymétrique des satellites 54, la rotation de la roue d'entrainement 48 n'a pas d'effet sur les satellites 54 ni sur la roue porte-satellite 50 qui est libre en rotation. Le mobile de secondes et le reste du rouage sont donc isolés pendant la remise à zéro des minutes grâce à ce dispositif de débrayage.The operation of the chronograph mechanism according to the invention is as follows:
The energy necessary for the operation of the chronograph is provided by the user during the reset of the chronograph, and more particularly during the resetting of the minutes which corresponds at the same time to the arming of the leaf spring 1. For this, the user presses the reset and winding pushbutton 22. As shown by the figure 2 the pressing on the pushbutton 22 according to the arrow has caused the lever 40 to pivot according to the arrow b, which causes the first lever 42 to move along the arrow c, which causes the second lever 44 and its arm to tilt; 44a according to the arrow d. During this tilting, the arm 44a presses the end 24a of the rake 24 along the arrow e, which causes the pivoting of the rake B. This pivoting of the rake B On the one hand, it causes the pivoting of the leaf spring 1 to A in order to arm it by virtue of the support of the end 24a of the rake 24 on the free end 1a of the leaf spring 1 and on the other hand the pivoting of the first gear sector 7 of the minute counter 5 driven by the toothing 24b in the direction of the arrow f. The second toothed sector 8 and the axis 10 of the minute counter, being integral with the first sector 7 are driven from the same angle in order to zero the indicator organs minutes, including the index 12. During its rotation, the second toothed sector 8 of the minute counter 5 meshes with the driving wheel 46, 48, but because of the asymmetrical toothing of the satellites 54, the rotation of the drive wheel 48 has no effect on the satellites 54 or on the planet wheel 50 which is free to rotate. The seconds mobile and the rest of the train are thus isolated during the resetting of minutes thanks to this disengaging device.

Lors de l'appui sur le poussoir de remise à zéro et d'armage 22, le compteur de secondes s'est également mis à zéro d'une manière connue.When pressing the reset and arming pushbutton 22, the seconds counter has also zeroed in a known manner.

Au cours de cette étape de mise à zéro et d'armage, l'énergie nécessaire au fonctionnement du chronographe est stockée dans le ressort-lame 1 qui travaille en flexion.During this step of setting to zero and arming, the energy necessary for the operation of the chronograph is stored in the leaf spring 1 which works in bending.

L'utilisateur démarre ensuite le comptage en appuyant sur le poussoir « start » 30. Comme le montre la figure 5, cela entraine le basculement de la bascule 28 selon la flèche a, ce qui entraine le basculement de la bascule 32 selon la flèche b de sorte que l'extrémité 34a du levier stop-balancier 34 se dégage du balancier pour libérer le système réglant 4. Le comptage peut alors commencer. L'énergie est libérée par le ressort-lame dont l'extrémité 1a appuie sur l'extrémité 24a du râteau 24 pour le faire pivoter en B dans le sens inverse de celui de la remise à zéro des minutes et de l'armage. Lors de ce pivotement, la denture 24b entraine le premier secteur denté 7 et donc le deuxième secteur denté 8 dans le sens inverse de celui de la remise à zéro des minutes et de l'armage. Les organes indicateurs des minutes se mettent à tourner à raison de une graduation par minute. Dans cette configuration, le deuxième secteur denté 8 du compteur de minutes 5 engrène avec le mobile d'entrainement 46, 48, mais du fait de la denture asymétrique des satellites 54, lesdits satellites 54 se bloquent de sorte que la rotation de la roue d'entrainement 48 entraine la rotation de la roue porte-satellite 50, qui entraine à son tour le compteur de secondes 6 pour transmettre le couple délivré par le ressort-lame aux autres éléments du rouage. L'organe indicateur des secondes se met à tourner pour indiquer les secondes.The user then starts counting by pressing the "start" pushbutton 30. As shown in FIG. figure 5 , This causes the rocker 28 to tilt along the arrow a, which causes the tilting of the rocker 32 along the arrow b so that the end 34a of the stop-and-balance lever 34 disengages from the rocker to release the regulating system 4 The count can then begin. The energy is released by the leaf spring whose end 1a presses on the end 24a of the rake 24 to rotate it in B in the opposite direction to that of the reset minutes and the arming. During this pivoting, the toothing 24b drives the first toothed sector 7 and therefore the second toothed sector 8 in the opposite direction to that of the reset of the minutes and the arming. The indicator organs of the minutes begin to rotate at a rate of graduation per minute. In this configuration, the second gear sector 8 of the minute counter 5 meshes with the driving wheel 46, 48, but because of the asymmetrical toothing of the satellites 54, the said satellites 54 lock up so that the rotation of the wheel The drive 48 causes rotation of the planet wheel 50, which in turn causes the seconds counter 6 to transmit the torque delivered by the leaf spring to the other elements of the train. The seconds indicator will start rotating to indicate seconds.

Le balancier et les organes indicateurs peuvent être stoppés par une première pression sur le poussoir 22 pour une lecture ou pour un temps mort. Comme le montre la figure 6, une première pression sur le poussoir 22 selon la flèche a entraine le pivotement du levier 40 selon la flèche b, ce qui entraine le déplacement des bascules 32 et 41 selon la flèche c de manière à ramener le stop-balancier 34 contre le balancier 4a pour le bloquer. Les organes indicateurs sont arrêtés pour une lecture intermédiaire ou un temps mort. La bascule 41 a également pivoté selon la flèche d pour libérer la bascule 42 qui tombe sur le levier 40 pour occuper sa position pour une éventuelle remise à zéro. Une nouvelle pression sur le poussoir « start » 30 permet de relancer le mécanisme de chronographe, comme décrit ci-dessus, sans remise à zéro. Une nouvelle première pression sur le poussoir 22 permet d'arrêter le mécanisme de chronographe, comme décrit ci-dessus. Une seconde pression sur le poussoir 22 permet de remettre à zéro le chronographe, et de réarmer le ressort-lame comme déjà décrit ci-dessus.The balance and the indicator organs can be stopped by a first pressure on the pusher 22 for reading or for a dead time. As shown in figure 6 , a first pressure on the pusher 22 according to the arrow has caused the pivoting of the lever 40 according to the arrow b, which causes the movement of the latches 32 and 41 along the arrow c so as to bring the stop-balance 34 against the balance 4a to block it. The indicator organs are stopped for an intermediate reading or a dead time. The latch 41 has also pivoted along the arrow d to release the latch 42 which falls on the lever 40 to occupy its position for a possible reset. Pressing again on the "start" pushbutton 30 makes it possible to restart the chronograph mechanism, as described above, without resetting to zero. A new first pressure on the pusher 22 makes it possible to stop the chronograph mechanism, as described above. A second pressure on the pusher 22 resets the chronograph, and reset the leaf spring as already described above.

Le mécanisme de chronographe selon l'invention présente un couple constant suffisant pour fonctionner correctement et représente un encombrement plus faible que les mécanismes de chronographes connus. Son mécanisme de remise à zéro, et plus particulièrement de remise à zéro des minutes, assure également la fonction de réarmage de l'accumulateur d'énergie, de sorte qu'aucun mécanisme de réarmage spécifique n'est nécessaire.The chronograph mechanism according to the invention has a constant torque sufficient to function properly and represents a smaller footprint than known chronograph mechanisms. Its reset mechanism, and more particularly reset of the minutes, also provides the function of re-setting the accumulator of energy, so that no specific reset mechanism is necessary.

Claims (8)

  1. Chronograph mechanism comprising its own energy accumulator (1) formed by a strip-spring, its own regulating system (4), a gear train connecting the energy accumulator (1) to the regulating system (4), and means for driving the gear train arranged to regulate the torque delivered by the strip-spring, characterized in that the gear train drive means comprise a rack (24) having one end (24a) arranged to cooperate with the strip-spring and another end (24b) arranged to cooperate with the gear train, wherein said rack (24) is mounted to pivot in one direction of rotation to drive the gear train.
  2. Chronograph mechanism according to claim 1, characterized in that the gear train comprises a minute-counter (5) comprising a first toothed sector (7) and in that the rack (24) has a toothing arranged to cooperate with said first toothed sector (7), wherein the first toothed sector (7) of the minute-counter (5) and the rack toothing (24) are not concentric.
  3. Chronograph mechanism according to claim 2, characterized in that the rack (24) is also mounted to pivot in the opposite direction of rotation in order to reset the minute-counter (5) to zero and to wind the strip-spring at the same time.
  4. Chronograph mechanism according to any of the preceding claims, characterized in that it comprises a device for regulating the torque delivered by the strip-spring.
  5. Chronograph mechanism according to claim 4, characterized in that the torque regulating device comprises an adjustable eccentric (26).
  6. Chronograph mechanism according to any of the preceding claims, characterized in that it comprises a mechanism for winding the energy accumulator (1) and resetting the minutes to zero, arranged to wind the energy accumulator (1) and reset the minutes to zero at the same time.
  7. Chronograph mechanism according to any of the preceding claims, characterized in that it comprises a mechanism for starting the counting, arranged to release the regulating system (4) when the counting starts.
  8. Timepiece including a chronograph mechanism according to any of the preceding claims.
EP15156070.3A 2015-02-23 2015-02-23 Chronograph mechanism Active EP3059642B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP15156070.3A EP3059642B1 (en) 2015-02-23 2015-02-23 Chronograph mechanism
US15/044,411 US20160246256A1 (en) 2015-02-23 2016-02-16 Chronograph mechanism
JP2016028581A JP6227030B2 (en) 2015-02-23 2016-02-18 Chronograph mechanism
CN201610096683.4A CN105911844B (en) 2015-02-23 2016-02-22 Time movement
US16/706,344 US11454931B2 (en) 2015-02-23 2019-12-06 Chronograph mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15156070.3A EP3059642B1 (en) 2015-02-23 2015-02-23 Chronograph mechanism

Publications (2)

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EP3059642A1 EP3059642A1 (en) 2016-08-24
EP3059642B1 true EP3059642B1 (en) 2019-05-22

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EP15156070.3A Active EP3059642B1 (en) 2015-02-23 2015-02-23 Chronograph mechanism

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US (2) US20160246256A1 (en)
EP (1) EP3059642B1 (en)
JP (1) JP6227030B2 (en)
CN (1) CN105911844B (en)

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EP3944026A1 (en) * 2020-07-21 2022-01-26 Rolex Sa Timepiece mechanism with counting chain
EP4134758B1 (en) * 2021-08-10 2024-04-03 Blancpain SA Timepiece mechanism indicating information about a surrounding pressure comprising a reset mechanism and timepiece, such as a diving watch, comprising such a mechanism
EP4451066A1 (en) * 2023-04-18 2024-10-23 Blancpain SA Timepiece movement comprising a chronograph mechanism, in particular with the display of split seconds

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Publication number Publication date
CN105911844A (en) 2016-08-31
US20200110362A1 (en) 2020-04-09
EP3059642A1 (en) 2016-08-24
JP2016156815A (en) 2016-09-01
CN105911844B (en) 2018-10-02
US11454931B2 (en) 2022-09-27
US20160246256A1 (en) 2016-08-25
JP6227030B2 (en) 2017-11-08

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