EP3349072A1 - Mechanism for timepiece comprising a cam and a finger - Google Patents

Mechanism for timepiece comprising a cam and a finger Download PDF

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Publication number
EP3349072A1
EP3349072A1 EP18151474.6A EP18151474A EP3349072A1 EP 3349072 A1 EP3349072 A1 EP 3349072A1 EP 18151474 A EP18151474 A EP 18151474A EP 3349072 A1 EP3349072 A1 EP 3349072A1
Authority
EP
European Patent Office
Prior art keywords
finger
notch
cam
probe
periphery
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.)
Granted
Application number
EP18151474.6A
Other languages
German (de)
French (fr)
Other versions
EP3349072B1 (en
Inventor
Stéphane von Gunten
Boris LEIMGRUBER
Régis TEUTSCHMANN
Loïc Pellaton
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.)
Manufacture et Fabrique de Montres et Chronometres Ulysse Nardin Le Locle SA
Original Assignee
Manufacture et Fabrique de Montres et Chronometres Ulysse Nardin Le Locle SA
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Publication of EP3349072A1 publication Critical patent/EP3349072A1/en
Application granted granted Critical
Publication of EP3349072B1 publication Critical patent/EP3349072B1/en
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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/02—Back-gearing arrangements between gear train and hands
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B21/00—Indicating the time by acoustic means
    • G04B21/02—Regular striking mechanisms giving the full hour, half hour or quarter hour
    • G04B21/04—Hour wheels; Racks or rakes; Snails or similar control mechanisms
    • 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

Definitions

  • the present invention relates to a mechanism for a timepiece comprising a cam and a probe.
  • the selection mechanism comprises a rocker controlling an actuator to engage or disengage one or more notches in the periphery of a cam.
  • WO02 / 077725 describes a chronograph comprising counters capable of rotating in both directions and provided with a control finger capable of meshing with a transmission wheel.
  • Such mechanisms frequently thus have a feeler that can be actuated to fall into a notch provided in the periphery of a cam, or to leave it.
  • the probe may fall on the edge of the cam instead of falling back into the notch.
  • US3696609 discloses a mechanism with a snail shaped cam and a feeler whose end is pressed against the periphery of the cam by elastic means.
  • the probe can be raised to rotate the cam in the opposite direction when setting the time. The probe is never engaged in a notch and the raising of the cam, or its lowering, does not pose any particular difficulties.
  • An object of the present invention is to provide a mechanism free of the above limitations.
  • an object of the invention is to provide a mechanism comprising a cam with a notch and a probe which can be raised or fall more easily in the notch.
  • An object of the invention is in particular to provide a mechanism comprising a cam with a notch having two edges and a bottom, and a finger that can be raised or extracted easily from this notch.
  • a goal is also to precisely control the position of the finger against the cam at a time when the finger bears against the periphery of the rotating cam, and when it is at the bottom of the notch.
  • the flexible element allows the end of the finger to move (by deformation of the finger, and / or by moving the entire finger) between a first position and a second position, so as to penetrate more easily into the notch.
  • the mechanism may comprise means for placing the finger in a first position pressed against the periphery of the cam or to raise it.
  • the mechanism may comprise, for example, a first actuator, for example a jumper, for placing the finger in a first position pressed against the periphery of the cam, and a second actuator, for example a hook, for placing the finger in a second position raised at a distance from this cam.
  • the probe may comprise an axis of rotation to enable it to rotate between the first and the second position, and vice versa.
  • the elastic portion may be arranged to change the distance between the finger and this axis of rotation.
  • the elastic portion may be arranged in such a way that the distance between the end of the finger and the axis of rotation is greater when the probe is in the first position than when the probe is in the second position.
  • the finger can be a separate part of the probe arm and assembled on this arm, for example by driving, clipping or gluing. This allows to realize the finger and the arm separately, for example with manufacturing steps and / or different materials, or in different thicknesses.
  • the elastic portion is integrally bonded to the finger. This reduces the number of parts and assembly operations.
  • a separate elastic portion of the finger can also be envisaged, for example an elastic portion connected to the arm, or an independent elastic portion.
  • the probe arm may include an opening.
  • the elastic portion of the finger can be engaged in this opening, so that the finger can move between a first position supported against an edge of the opening forming a first stop, and a second position pressed against the opposite edge of the opening forming a second stop.
  • the elastic portion may be arranged to constrain the finger against the second stop when the finger is free. In this second position, the deformation of the probe allows the finger to penetrate more easily into the notch.
  • the probe may comprise an arm and a probe head provided with the finger.
  • the invention is particularly suitable for cams provided with a notch having two edges and a bottom.
  • the finger can only be raised from the notch by raising the probe.
  • the finger is arranged to fall almost instantly into the notch when it is in the pressed position in front of the notch, and not to fall into the notch when in the raised position.
  • the finger can fall into the notch either following a rotation of the cam, bringing the notch in front of the finger pressed; either following a movement of the finger passing from the raised position to the pressed position in front of the notch.
  • One of the edges of the notch is preferably flared to facilitate the introduction and / or extraction of the finger.
  • the cam and the finger are preferably arranged so that the finger is not in contact with the bottom of the notch when the finger is in the notch.
  • the finger is supported by the flexible member only against one of the edges of the notch, preferably against the flared edge of the notch, when in the notch.
  • the mechanism illustrated by way of example in different positions on Figures 1 to 4 comprises a cam 1 mounted on the same axis 12 as a toothed wheel 13, for example a wheel or a pinion.
  • the mobile 13 is part of the gear of a watch movement, for example the workings of a countdown mechanism.
  • the mobile 13 may for example lead to a barrel 10 which is secured to the needle or the minute disc of a countdown indicator, for example a minute counter for a regatta watch.
  • the direction of rotation of the mobile 13 depends on the operating mode; in the illustrated example, this mobile rotates clockwise during the countdown, and does not run in chronograph mode.
  • the invention can also be applied to other horological complications employing a cam with a notch and a feeler, for example a bell watch.
  • the periphery 11 of the cam 1 has a notch 10.
  • the notch is concave and has two edges 101, 102 + 103, one of which is flared, and a bottom. The edges are separated from the bottom by an edge.
  • a feeler 5 provided with a finger 50 can be pressed against this periphery 11 by means of a not shown jumper, in the position A illustrated on FIG. figure 1 and in position C illustrated on the Figures 2 to 3 , or raised away from this periphery in position B illustrated on the figure 4 .
  • a not shown star can also be mounted on the axis 12, which indexes the cam 1 to place it in predetermined angular positions when a jumper not shown is pressed against this star.
  • One of these predetermined positions allows for example to place the notch 10 in front of the finger 50, to facilitate its penetration into the notch.
  • One of the edges 101 of the notch 10 is substantially rectilinear and perpendicular to the bottom of the notch while the other edge 102 is more flared.
  • the feeler 5 can pivot about the axis of rotation 52.
  • the jumper evoked allows to rotate the arm 5 about the axis 52 to press against the periphery 11 in position A.
  • the position A corresponds to a countdown position.
  • Position C corresponds to a chronograph counting position.
  • Position B may correspond to a reset position of the chronograph hands or indicator disc.
  • a not shown hook makes it possible to grip the portion 540 of the end 54 of the probe in order to raise it to position B by rotating it around the axis 52. When this hook is released, the feeler drops back to the A or C positions. supported against the periphery 11, under the action of a not shown jumper.
  • This hook can be released by a push button not shown, for example a start button of the chronograph.
  • the probe 5 comprises an arm 53 and an end opposite the axis of rotation 52 and constituting a probe head.
  • An oblong opening 55 formed in the probe head serves to retain the finger 50.
  • the finger 50 therefore consists of a separate component of the arm 53 of the probe, and is assembled to this arm.
  • the assembly is carried out by driving or gluing a stud 510 integrated to the finger 50 into the opening 55.
  • the stud is mounted at the end of a flexible portion 51 between the stud 510 and the body 511 of the finger, including including the end of the finger 512 engaged in the notch 10.
  • the flexible portion 51 exerts a prestress on the head 511 and the end 512 of the finger 50, so as to pivot this end 512 in clockwise (in direction of the center of rotation 52) and against a stop 531 formed on the edge of the opening 55 closest to the axis of rotation 52.
  • This preloaded position allows to move the end 512 away from the finger to be engaged in the notch of the rectilinear edge 101 of the cam, and to facilitate its insertion into the notch from the position illustrated on the figure 4 , for example during a chronograph start directly from the reset position B.
  • the finger 50 When it reaches the bottom of the notch, the finger 50 is released from the reaction force exerted by the periphery 11 of the cam 1, and resumes its position against the abutment 531 under the effect of the prestressing created by the flexible portion 51, leaving a clearance 100 between the head of the finger 512 and the edge 101.
  • the distance between the end of the finger and the axis of rotation 52 is therefore changed when the finger enters the notch under the effect jumper from position A.
  • the figure 4 illustrates the mechanism with a push-button in raised position B.
  • this position is reached for example by actuating the reset button of the chronograph hands.
  • this position can for example also be obtained during the setting of the countdown.
  • the cam 1 can rotate for example under the action of the account adjustment mechanism.
  • the feeler 5 falls back into the position A or C (corresponding to figures 2 and 3 ) against the periphery 11 of the cam 1, and to reach the position C, the finger 50 enters the notch 10 under the action of jumper mentioned above. From this position, the action of the elastic portion 51 tends to move the end of the finger 50 away from the edge 101, to facilitate its penetration.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Measuring Leads Or Probes (AREA)

Abstract

15. Mécanisme pour pièce d'horlogerie, comportant : une came (1) dont la périphérie (11) présente une encoche (10); un palpeur (5) comportant un bras (53) muni d'un axe de rotation et une tête de palpeur (54) munie d'un doigt (50) agencé pour palper ladite périphérie, et pour tomber dans l'encoche (10) lorsque celle-ci se retrouve en face du doigt du palpeur; le palpeur (5) pouvant pivoter autour de l'axe de rotation (52) de manière à placer le doigt soit dans une première position (A) appuyée contre ladite périphérie (11) de la came, soit en relevant le palpeur dans une seconde position (B) à distance de ladite came, le doigt étant monté mobile sur le palpeur, de manière à se déplacer dans un premier sens par rapport au palpeur sous l'effet de la force de réaction exercée par ladite périphérie de la came lorsque le doigt est appuyé contre cette came mise en rotation, un élément flexible (51) étant prévu pour déplacer le doigt par rapport au palpeur dans un deuxième sens opposé au premier sens lorsque le doigt n'est pas en appui contre la périphérie de la came, le mécanisme étant agencé de manière à ce que l'élément flexible (51) déplace le doigt dans le deuxième sens par rapport au capteur également lorsque le doigt est dans l'encoche.15. Mechanism for a timepiece, comprising: a cam (1) whose periphery (11) has a notch (10); a feeler (5) comprising an arm (53) provided with an axis of rotation and a probe head (54) provided with a finger (50) arranged to feel the said periphery, and to fall into the notch (10) when it is found in front of the finger of the probe; the feeler (5) being pivotable about the axis of rotation (52) so as to place the finger in a first position (A) pressed against said periphery (11) of the cam, or by raising the probe in a second position (B) remote from said cam, the finger being movably mounted on the probe, so as to move in a first direction with respect to the probe under the effect of the reaction force exerted by said periphery of the cam when the finger is pressed against this rotating cam, a flexible element (51) being provided for moving the finger relative to the probe in a second direction opposite to the first direction when the finger does not bear against the periphery of the cam, the mechanism being arranged so that the flexible element (51) moves the finger in the second direction relative to the sensor also when the finger is in the notch.

Description

Domaine techniqueTechnical area

La présente invention concerne un mécanisme pour pièce d'horlogerie comportant une came et un palpeur.The present invention relates to a mechanism for a timepiece comprising a cam and a probe.

Etat de la techniqueState of the art

On connait dans l'état de la technique des mouvements horlogers permettant de choisir le sens de rotation d'un organe d'affichage, par exemple pour sélectionner une fonction de chronographe ou de compte-à-rebours.Known in the state of the art of watch movements to select the direction of rotation of a display member, for example to select a chronograph function or countdown.

Un exemple d'un tel mécanisme est décrit par exemple dans la demande de brevet EP3026506A1 . Le mécanisme de sélection comporte une bascule commandant un actionneur pour l'engager ou le dégager d'une ou plusieurs encoches ménagées dans la périphérie d'une came.An example of such a mechanism is described for example in the patent application EP3026506A1 . The selection mechanism comprises a rocker controlling an actuator to engage or disengage one or more notches in the periphery of a cam.

WO02/077725 décrit un chronographe comportant des compteurs susceptibles de tourner dans les deux sens et munis d'un doigt de commande capable de s'engrener sur une roue de transmission. WO02 / 077725 describes a chronograph comprising counters capable of rotating in both directions and provided with a control finger capable of meshing with a transmission wheel.

De tels mécanismes comportent ainsi fréquemment un palpeur qui peut être actionné pour tomber dans une encoche prévue dans la périphérie d'une came, ou pour en sortir. Il arrive cependant que le palpeur retombe sur le bord de la came au lieu de retomber dans l'encoche.Such mechanisms frequently thus have a feeler that can be actuated to fall into a notch provided in the periphery of a cam, or to leave it. However, the probe may fall on the edge of the cam instead of falling back into the notch.

Afin de réduire ce risque, il est nécessaire de diminuer la taille de la tête de palpeur pour lui permettre de pénétrer plus facilement dans l'encoche. Le jeu ainsi créé entre le palpeur et l'encoche occasionne cependant une imprécision sur le positionnement angulaire de la came et de l'indicateur actionné par cette came.To reduce this risk, it is necessary to reduce the size of the probe head to allow it to penetrate more easily into the notch. The game thus created between the feeler and the notch causes however, an inaccuracy in the angular positioning of the cam and the indicator actuated by this cam.

US3696609 décrit un mécanisme avec une came en forme d'escargot et un palpeur dont l'extrémité est appuyée contre la périphérie de la came par un moyen élastique. Le palpeur peut être relevé afin de faire tourner la came en sens inverse lors de la mise à l'heure. Le palpeur n'est jamais engagé dans une encoche et le relèvement de la came, ou son abaissement, ne pose pas de difficultés particulières. US3696609 discloses a mechanism with a snail shaped cam and a feeler whose end is pressed against the periphery of the cam by elastic means. The probe can be raised to rotate the cam in the opposite direction when setting the time. The probe is never engaged in a notch and the raising of the cam, or its lowering, does not pose any particular difficulties.

On connait cependant des mécanismes qui requièrent une came avec une encoche étroite, munie de deux bords et d'un fond, dont l'extrémité du palpeur peut uniquement être extraite en pivotant la came. L'encoche doit être suffisamment large pour permettre une insertion ou une extraction aisée de l'extrémité du palpeur, même si cette extrémité n'est pas exactement positionnée en face de l'encoche. Une encoche excessivement large pose cependant le problème d'un positionnement imprécis de l'extrémité du palpeur au fond de l'encoche.However, mechanisms are known which require a cam with a narrow notch, provided with two edges and a bottom, whose end of the probe can only be extracted by pivoting the cam. The notch must be wide enough to allow easy insertion or extraction of the tip of the probe, even if this end is not exactly positioned in front of the notch. An excessively wide notch, however, poses the problem of imprecise positioning of the tip of the probe at the bottom of the notch.

Bref résumé de l'inventionBrief summary of the invention

Un but de la présente invention est de proposer un mécanisme exempt des limitations ci-dessus.An object of the present invention is to provide a mechanism free of the above limitations.

En particulier, un but de l'invention est de proposer un mécanisme comportant une came avec une encoche et un palpeur qui peut être relevé ou retomber plus facilement dans l'encoche.In particular, an object of the invention is to provide a mechanism comprising a cam with a notch and a probe which can be raised or fall more easily in the notch.

Un but de l'invention est notamment de proposer un mécanisme comportant une came avec une encoche comportant deux bords et un fond, et un doigt qui peut être relevé ou extrait facilement de cette encoche.An object of the invention is in particular to provide a mechanism comprising a cam with a notch having two edges and a bottom, and a finger that can be raised or extracted easily from this notch.

Un but est aussi de contrôler précisément la position du doigt contre la came à la fois lorsque le doigt est en appui contre la périphérie de la came en rotation, et lorsqu'il est au fond de l'encoche.A goal is also to precisely control the position of the finger against the cam at a time when the finger bears against the periphery of the rotating cam, and when it is at the bottom of the notch.

Selon l'invention, ces buts sont atteints notamment au moyen d'un mécanisme pour pièce d'horlogerie, comportant :

  • une came dont la périphérie présente une encoche;
  • un palpeur comportant un bras muni d'un axe de rotation et une tête de palpeur munie d'un doigt agencé pour palper ladite périphérie, et pour tomber dans l'encoche lorsque celle-ci se retrouve en face du doigt du palpeur;
  • le palpeur pouvant pivoter autour de l'axe de rotation de manière à placer le doigt soit dans une première position appuyée contre ladite périphérie de la came, soit, en relevant le palpeur, dans une seconde position à distance de ladite came,
  • le doigt étant monté sur le palpeur de manière à ce que son extrémité puisse se déplacer dans un premier sens par rapport au palpeur sous l'effet de la force de réaction exercée par ladite périphérie de la came lorsque le doigt est appuyé contre cette came mise en rotation,
  • un élément flexible étant prévu pour déplacer l'extrémité du doigt par rapport au palpeur dans un deuxième sens opposé au premier sens lorsque le doigt n'est pas en appui contre la périphérie de la came,
  • le mécanisme étant agencé de manière à ce que l'élément flexible déplace l'extrémité du doigt dans le deuxième sens par rapport au capteur également lorsque le doigt est dans l'encoche.
According to the invention, these objects are achieved in particular by means of a mechanism for a timepiece, comprising:
  • a cam whose periphery has a notch;
  • a probe comprising an arm provided with an axis of rotation and a probe head provided with a finger arranged to feel the said periphery, and to fall into the notch when the latter is found in front of the probe finger;
  • the probe being able to pivot about the axis of rotation so as to place the finger in a first position pressed against said periphery of the cam, or, by raising the probe, in a second position remote from said cam,
  • the finger being mounted on the probe so that its end can move in a first direction relative to the probe under the effect of the reaction force exerted by said periphery of the cam when the finger is pressed against this cam put in rotation,
  • a flexible element being provided for moving the end of the finger relative to the probe in a second direction opposite to the first direction when the finger does not bear against the periphery of the cam,
  • the mechanism being arranged so that the flexible element moves the end of the finger in the second direction relative to the sensor also when the finger is in the notch.

L'élément flexible permet à l'extrémité du doigt de se déplacer (par déformation du doigt, et/ou par déplacement de tout le doigt) entre une première position et une deuxième position, de manière à pénétrer plus aisément dans l'encoche.The flexible element allows the end of the finger to move (by deformation of the finger, and / or by moving the entire finger) between a first position and a second position, so as to penetrate more easily into the notch.

Le mécanisme peut comporter des moyens pour placer le doigt dans une première position appuyée contre la périphérie de la came ou pour le relever. A cet effet, le mécanisme peut comporter par exemple un premier actionneur, par exemple un sautoir, pour placer le doigt dans une première position appuyée contre la périphérie de la came, et un deuxième actionneur, par exemple un crochet, pour placer le doigt dans une seconde position relevée à distance de cette came.The mechanism may comprise means for placing the finger in a first position pressed against the periphery of the cam or to raise it. For this purpose, the mechanism may comprise, for example, a first actuator, for example a jumper, for placing the finger in a first position pressed against the periphery of the cam, and a second actuator, for example a hook, for placing the finger in a second position raised at a distance from this cam.

Le palpeur peut comporter un axe de rotation pour lui permettre de tourner entre la première et la deuxième position, et réciproquement. La portion élastique peut être agencée pour modifier la distance entre le doigt et cet axe de rotation.The probe may comprise an axis of rotation to enable it to rotate between the first and the second position, and vice versa. The elastic portion may be arranged to change the distance between the finger and this axis of rotation.

La portion élastique peut être agencée de manière à ce que la distance entre l'extrémité du doigt et l'axe de rotation soit plus importante lorsque le palpeur est en première position que lorsque le palpeur est en seconde position.The elastic portion may be arranged in such a way that the distance between the end of the finger and the axis of rotation is greater when the probe is in the first position than when the probe is in the second position.

Le doigt peut constituer une pièce distincte du bras du palpeur et assemblée sur ce bras, par exemple par chassage, clipsage ou collage. Cela permet de réaliser le doigt et le bras séparément, par exemple avec des étapes de fabrication et/ou des matériaux distincts, ou dans des épaisseurs différentes.The finger can be a separate part of the probe arm and assembled on this arm, for example by driving, clipping or gluing. This allows to realize the finger and the arm separately, for example with manufacturing steps and / or different materials, or in different thicknesses.

Dans un mode de réalisation, la portion élastique est liée intégralement au doigt. Cela permet de réduire le nombre de pièces et d'opérations d'assemblage.In one embodiment, the elastic portion is integrally bonded to the finger. This reduces the number of parts and assembly operations.

Une portion élastique distincte du doigt peut aussi être envisagée, par exemple une portion élastique liée au bras, ou une portion élastique indépendante.A separate elastic portion of the finger can also be envisaged, for example an elastic portion connected to the arm, or an independent elastic portion.

Dans un mode de réalisation, le bras du palpeur peut comporter une ouverture. La portion élastique du doigt peut être engagée dans cette ouverture, de manière à ce que le doigt puisse se déplacer entre une première position appuyée contre un bord de l'ouverture formant une première butée, et une seconde position appuyée contre le bord opposé de l'ouverture formant une seconde butée.In one embodiment, the probe arm may include an opening. The elastic portion of the finger can be engaged in this opening, so that the finger can move between a first position supported against an edge of the opening forming a first stop, and a second position pressed against the opposite edge of the opening forming a second stop.

La portion élastique peut être agencée pour contraindre le doigt contre la seconde butée lorsque le doigt est libre. Dans cette seconde position, la déformation du palpeur permet au doigt de pénétrer plus facilement dans l'encoche.The elastic portion may be arranged to constrain the finger against the second stop when the finger is free. In this second position, the deformation of the probe allows the finger to penetrate more easily into the notch.

Dans la première position appuyée, la déformation de la portion élastique du palpeur par la came permet au doigt de s'appuyer contre la première butée, en exerçant une force élastique contre cette butée.In the first supported position, the deformation of the elastic portion of the probe by the cam allows the finger to rest against the first stop, exerting an elastic force against this stop.

Le palpeur peut comporter un bras et une tête de palpeur munie du doigt.The probe may comprise an arm and a probe head provided with the finger.

L'invention est en particulier adaptée à des cames munies d'une encoche comportant deux bords et un fond.The invention is particularly suitable for cams provided with a notch having two edges and a bottom.

Dans un mode de réalisation préférentiel, le doigt peut uniquement être relevé de l'encoche en relevant le palpeur.In a preferred embodiment, the finger can only be raised from the notch by raising the probe.

Le doigt est agencé pour retomber quasi instantanément dans l'encoche lorsqu'il se trouve en position appuyée en face de l'encoche, et pour ne pas tomber dans l'encoche lorsqu'il se trouve en position relevée.The finger is arranged to fall almost instantly into the notch when it is in the pressed position in front of the notch, and not to fall into the notch when in the raised position.

Le doigt peut donc tomber dans l'encoche soit à la suite d'une rotation de la came, amenant l'encoche en face du doigt appuyé ; soit à la suite d'un déplacement du doigt passant de la position relevée à la position appuyée en face de l'encoche.The finger can fall into the notch either following a rotation of the cam, bringing the notch in front of the finger pressed; either following a movement of the finger passing from the raised position to the pressed position in front of the notch.

« Quasi-instantanément » signifie dans ce contexte que la chute du doigt dans l'encoche se produit sans étape intermédiaire; en position appuyée, le doigt peut donc soit se trouver appuyé contre la périphérie de la came, soit contre un bord de l'encoche. Un état stable dans une profondeur intermédiaire de l'encoche, sans contact avec un bord, est donc exclu."Almost instantaneously" means in this context that the fall of the finger in the notch occurs without intermediate step; in a supported position, the finger can either be leaning against the periphery of the cam, either against an edge of the notch. A stable state in an intermediate depth of the notch, without contact with an edge, is excluded.

Un des bords de l'encoche est de préférence évasé afin de faciliter l'introduction et/ou l'extraction du doigt.One of the edges of the notch is preferably flared to facilitate the introduction and / or extraction of the finger.

La came et le doigt sont de préférence agencés de manière à ce que le doigt ne soit pas en contact avec le fond de l'encoche lorsque le doigt est dans l'encoche.The cam and the finger are preferably arranged so that the finger is not in contact with the bottom of the notch when the finger is in the notch.

Dans un mode de réalisation préférentiel, le doigt est appuyé par l'élément flexible uniquement contre un des bords de l'encoche, de préférence contre le bord évasé de l'encoche, lorsqu'il est dans l'encoche.In a preferred embodiment, the finger is supported by the flexible member only against one of the edges of the notch, preferably against the flared edge of the notch, when in the notch.

Brève description des figuresBrief description of the figures

Des exemples de mise en oeuvre de l'invention sont indiqués dans la description illustrée par les figures annexées dans lesquelles :

  • La figure 1 illustre le mécanisme de l'invention dans une première position, le doigt étant appuyé contre la périphérie de la came.
  • La figure 2 illustre le mécanisme de l'invention dans une troisième position, le doigt étant appuyé au fond de l'encoche sur la périphérie de la came.
  • La figure 3 est un agrandissement de la figure 2, montrant le doigt et l'encoche.
  • La figure 4 illustre le mécanisme de l'invention dans une seconde position, le doigt étant relevé à distance de la périphérie de la came.
Examples of implementation of the invention are indicated in the description illustrated by the appended figures in which:
  • The figure 1 illustrates the mechanism of the invention in a first position, the finger being pressed against the periphery of the cam.
  • The figure 2 illustrates the mechanism of the invention in a third position, the finger being pressed at the bottom of the notch on the periphery of the cam.
  • The figure 3 is an enlargement of the figure 2 , showing the finger and the notch.
  • The figure 4 illustrates the mechanism of the invention in a second position, the finger being raised away from the periphery of the cam.

Exemple(s) de mode de réalisation de l'inventionExample (s) of embodiment of the invention

Le mécanisme illustré à titre d'exemple dans différentes positions sur les figures 1 à 4 comporte une came 1 montée sur le même axe 12 qu'un mobile denté 13, par exemple une roue ou un pignon. Dans un mode de réalisation, le mobile 13 fait partie du train d'engrenage d'un mouvement horloger, par exemple du rouage d'un mécanisme de compte à rebours. Le mobile 13 peut par exemple entraîner un canon 10 dont est solidaire l'aiguille ou le disque des minutes d'un indicateur de compte à rebours, par exemple d'un compteur de minutes pour une montre régate.The mechanism illustrated by way of example in different positions on Figures 1 to 4 comprises a cam 1 mounted on the same axis 12 as a toothed wheel 13, for example a wheel or a pinion. In one embodiment, the mobile 13 is part of the gear of a watch movement, for example the workings of a countdown mechanism. The mobile 13 may for example lead to a barrel 10 which is secured to the needle or the minute disc of a countdown indicator, for example a minute counter for a regatta watch.

Le sens de rotation du mobile 13 dépend du mode de fonctionnement; dans l'exemple illustré, ce mobile tourne dans le sens horaire lors du compte à rebours, et ne tourne pas en mode chronographe.The direction of rotation of the mobile 13 depends on the operating mode; in the illustrated example, this mobile rotates clockwise during the countdown, and does not run in chronograph mode.

L'invention peut aussi être appliquée à d'autres complications horlogères mettant en oeuvre une came avec une encoche et un palpeur, par exemple à une montre à sonnerie.The invention can also be applied to other horological complications employing a cam with a notch and a feeler, for example a bell watch.

La périphérie 11 de la came 1 comporte une encoche 10. L'encoche est concave et présente deux bords 101, 102+103, dont l'un est évasé, et un fond. Les bords sont séparés du fond par une arête. Un palpeur 5 muni d'un doigt 50 peut être appuyé contre cette périphérie 11 à l'aide d'un sautoir non représenté, dans la position A illustrée sur la figure 1 et dans la position C illustrée sur les figures 2 à 3, ou relevé à distance de cette périphérie dans la position B illustrée sur la figure 4.The periphery 11 of the cam 1 has a notch 10. The notch is concave and has two edges 101, 102 + 103, one of which is flared, and a bottom. The edges are separated from the bottom by an edge. A feeler 5 provided with a finger 50 can be pressed against this periphery 11 by means of a not shown jumper, in the position A illustrated on FIG. figure 1 and in position C illustrated on the Figures 2 to 3 , or raised away from this periphery in position B illustrated on the figure 4 .

Une étoile non représentée peut aussi être montée sur l'axe 12, qui permet d'indexer la came 1 pour la placer dans des positions angulaires prédéterminées lorsqu'un sautoir non représenté est appuyé contre cette étoile. Une de ces positions prédéterminées permet par exemple de placer l'encoche 10 en face du doigt 50, pour faciliter sa pénétration dans l'encoche.A not shown star can also be mounted on the axis 12, which indexes the cam 1 to place it in predetermined angular positions when a jumper not shown is pressed against this star. One of these predetermined positions allows for example to place the notch 10 in front of the finger 50, to facilitate its penetration into the notch.

Un des bords 101 de l'encoche 10 est pratiquement rectiligne et perpendiculaire au fond de l'encoche tandis que l'autre bord 102 est plus évasé.One of the edges 101 of the notch 10 is substantially rectilinear and perpendicular to the bottom of the notch while the other edge 102 is more flared.

Le palpeur 5 peut pivoter autour de l'axe de rotation 52. Le sautoir évoqué permet de faire tourner le bras 5 autour de l'axe 52 pour l'appuyer contre la périphérie 11 dans la position A.The feeler 5 can pivot about the axis of rotation 52. The jumper evoked allows to rotate the arm 5 about the axis 52 to press against the periphery 11 in position A.

Dans un mode de réalisation, la position A correspond à une position de compte à rebours. La position C correspond à une position de comptage de chronographe. La position B peut correspondre à une position de remise à zéro des aiguilles ou du disque indicateur du chronographe. Un crochet non représenté permet d'agripper la portion 540 de l'extrémité 54 du palpeur afin de le relever en position B en le faisant tourner autour de l'axe 52. Lorsque ce crochet est dégagé, le palpeur retombe en positions A ou C appuyées contre la périphérie 11, sous l'action d'un sautoir non illustré. Ce crochet peut être dégagé par un bouton-poussoir non représenté, par exemple un bouton de départ du chronographe.In one embodiment, the position A corresponds to a countdown position. Position C corresponds to a chronograph counting position. Position B may correspond to a reset position of the chronograph hands or indicator disc. A not shown hook makes it possible to grip the portion 540 of the end 54 of the probe in order to raise it to position B by rotating it around the axis 52. When this hook is released, the feeler drops back to the A or C positions. supported against the periphery 11, under the action of a not shown jumper. This hook can be released by a push button not shown, for example a start button of the chronograph.

Le palpeur 5 comporte un bras 53 et une extrémité opposée à l'axe de rotation 52 et constituant une tête de palpeur. Une ouverture 55 oblongue ménagée dans la tête de palpeur permet de retenir le doigt 50. Dans ce mode de réalisation, le doigt 50 est donc constitué d'un composant distinct du bras 53 du palpeur, et est assemblé à ce bras.The probe 5 comprises an arm 53 and an end opposite the axis of rotation 52 and constituting a probe head. An oblong opening 55 formed in the probe head serves to retain the finger 50. In this embodiment, the finger 50 therefore consists of a separate component of the arm 53 of the probe, and is assembled to this arm.

L'assemblage est réalisé par chassage ou collage d'un plot 510 intégré au doigt 50 dans l'ouverture 55. Le plot est monté à l'extrémité d'une portion flexible 51 entre le plot 510 et le corps 511 du doigt, y compris l'extrémité du doigt 512 engagée dans l'encoche 10.The assembly is carried out by driving or gluing a stud 510 integrated to the finger 50 into the opening 55. The stud is mounted at the end of a flexible portion 51 between the stud 510 and the body 511 of the finger, including including the end of the finger 512 engaged in the notch 10.

Dans la position libre illustrée sur la figure 4, c'est-à-dire lorsque le palpeur 5 est relevé à distance de la périphérie 11, la portion flexible 51 exerce une précontrainte sur la tête 511 et l'extrémité 512 du doigt 50, de manière à faire pivoter cette extrémité 512 dans le sens horaire (en direction du centre de rotation 52) et à l'appuyer contre une butée 531 formée sur le bord de l'ouverture 55 le plus proche de l'axe de rotation 52. Cette position précontrainte permet d'éloigner l'extrémité 512 du doigt destinée à être engagée dans l'encoche du bord 101 rectiligne de la came, et de faciliter son introduction dans l'encoche depuis la position illustrée sur la figure 4, par exemple lors d'un démarrage de chronographe directement depuis la position de remise à zéro B.In the free position illustrated on the figure 4 , that is to say when the feeler 5 is raised away from the periphery 11, the flexible portion 51 exerts a prestress on the head 511 and the end 512 of the finger 50, so as to pivot this end 512 in clockwise (in direction of the center of rotation 52) and against a stop 531 formed on the edge of the opening 55 closest to the axis of rotation 52. This preloaded position allows to move the end 512 away from the finger to be engaged in the notch of the rectilinear edge 101 of the cam, and to facilitate its insertion into the notch from the position illustrated on the figure 4 , for example during a chronograph start directly from the reset position B.

Lorsque le doigt 5 glisse sur la périphérie 11 de la came 1 tournant dans le sens z (ici le sens horaire), dans la position illustrée sur la figure 1, la force de réaction exercée par cette périphérie à l'encontre de l'appui du doigt 50 fait pivoter ce doigt dans un premier sens (sens antihoraire) par rapport à l'axe de rotation 56 du doigt 50. En effet, le couple exercé par cette force de réaction, et/ou par la force de friction, s'oppose et est supérieur au moment de force autour de cet axe de rotation 56 dû à la précontrainte exercée par la portion flexible 51 sur le doigt 50. Le doigt 50 est alors repoussé contre une deuxième butée 530 formée sur le bord de l'ouverture 55 le plus éloigné de l'axe de rotation 52.When the finger 5 slides on the periphery 11 of the cam 1 rotating in the z direction (here clockwise), in the position illustrated on the figure 1 , the reaction force exerted by this periphery against the support of the finger 50 rotates the finger in a first direction (counterclockwise) relative to the axis of rotation 56 of the finger 50. Indeed, the couple exerted by this reaction force, and / or by the friction force, opposes and is greater than the moment of force around this axis of rotation 56 due to the preload exerted by the flexible portion 51 on the finger 50. The finger 50 is then pushed against a second stop 530 formed on the edge of the opening 55 farthest from the axis of rotation 52.

Lorsque l'encoche 10 parvient en regard du doigt 50, celui-ci retombe quasi instantanément au fond de l'encoche, en pivotant brusquement autour de l'axe 52 sous l'effet du sautoir non représenté. Les figures 2 et 3 montrent la position du doigt 50 après son introduction dans l'encoche 10.When the notch 10 arrives opposite the finger 50, the latter falls almost instantaneously to the bottom of the notch, pivoting sharply around the axis 52 under the effect of not shown jumper. The figures 2 and 3 show the position of the finger 50 after its insertion into the notch 10.

Lorsqu'il parvient au fond de l'encoche, le doigt 50 est libéré de la force de réaction exercée par la périphérie 11 de la came 1, et reprend sa position appuyée contre la butée 531 sous l'effet de la précontrainte créée par la portion flexible 51, en laissant un jeu 100 entre la tête du doigt 512 et le bord 101. La distance entre l'extrémité du doigt et l'axe de rotation 52 se modifie donc lorsque le doigt pénètre dans l'encoche sous l'effet du sautoir depuis la position A.When it reaches the bottom of the notch, the finger 50 is released from the reaction force exerted by the periphery 11 of the cam 1, and resumes its position against the abutment 531 under the effect of the prestressing created by the flexible portion 51, leaving a clearance 100 between the head of the finger 512 and the edge 101. The distance between the end of the finger and the axis of rotation 52 is therefore changed when the finger enters the notch under the effect jumper from position A.

La figure 4 illustre le mécanisme avec un poussoir en position B relevée. Dans le cas d'un chronographe, cette position est atteinte par exemple en actionnant le bouton de remise à zéro des aiguilles du chronographe. Dans le cas d'un dispositif combinant un chronographe et un compte à rebours, cette position peut par exemple aussi être obtenue lors du réglage du compte à rebours. Dans cette position, la came 1 peut tourner par exemple sous l'action du mécanisme de réglage de compte à.The figure 4 illustrates the mechanism with a push-button in raised position B. In the case of a chronograph, this position is reached for example by actuating the reset button of the chronograph hands. In the case of a device combining a chronograph and a countdown, this position can for example also be obtained during the setting of the countdown. In this position, the cam 1 can rotate for example under the action of the account adjustment mechanism.

En enfonçant le bouton start depuis cette position, le palpeur 5 retombe dans la position A ou C (correspondant aux figures 2 et 3) d'appui contre la périphérie 11 de la came 1, et, pour atteindre la position C, le doigt 50 pénètre dans l'encoche 10 sous l'action du sautoir évoqué plus haut. Depuis cette position, l'action de la portion élastique 51 tend à éloigner l'extrémité du doigt 50 à distance du bord 101, afin de faciliter sa pénétration.By pressing the start button from this position, the feeler 5 falls back into the position A or C (corresponding to figures 2 and 3 ) against the periphery 11 of the cam 1, and to reach the position C, the finger 50 enters the notch 10 under the action of jumper mentioned above. From this position, the action of the elastic portion 51 tends to move the end of the finger 50 away from the edge 101, to facilitate its penetration.

Numéros de référence employés sur les figuresReference numbers used in the figures

11
CameCam
1010
Encochenick
100100
Jeu entre le doigt et le premier bord 101 de l'encocheGame between the finger and the first edge 101 of the notch
101101
Premier bord de l'encocheFirst edge of the notch
102102
Second bord de l'encocheSecond edge of the notch
103103
Bord évasé de l'encocheFlared edge of the notch
1111
Périphérie de la camePeriphery of the cam
1212
AxeAxis
1313
Mobile dentéDented Mobile
55
Palpeurfeeler
5050
Doigt du palpeur (ou bec)Probe finger (or spout)
5151
Portion élastiqueElastic portion
510510
PlotPlot
511511
Corps du doigtBody of the finger
512512
Extrémité du doigt engageable dans l'encocheEnd of the finger engageable in the notch
5252
Axe de rotationRotation axis
5353
BrasArms
530530
Première butée dans le brasFirst stop in the arm
531531
Seconde butée dans le brasSecond stop in the arm
5454
Tête de palpeurProbe head
5555
Ouverture dans le bras du palpeurOpening in the probe arm
5656
Axe de rotation du doigtRotation axis of the finger
zz
Sens de rotation de la came 1 lors du compte à reboursDirection of rotation of the cam 1 during the countdown
AAT
Première position (appuyée)First position (supported)
BB
Deuxième position (libre)Second position (free)
CVS
Troisième position (doigt engagé dans l'encoche)Third position (finger engaged in the notch)

Claims (14)

Mécanisme pour pièce d'horlogerie, comportant : une came (1) dont la périphérie (11) présente une encoche (10) ; un palpeur (5) comportant un bras (53) muni d'un axe de rotation et une tête de palpeur (54) munie d'un doigt (50) agencé pour palper ladite périphérie, et pour tomber dans l'encoche (10) lorsque celle-ci se retrouve en face du doigt du palpeur; le palpeur (5) pouvant pivoter autour de l'axe de rotation (52) de manière à placer le doigt soit dans une première position (A) appuyée contre ladite périphérie (11) de la came, soit en relevant le palpeur dans une seconde position (B) à distance de ladite came, le doigt étant monté sur le palpeur de manière à ce que son extrémité puisse se déplacer dans un premier sens par rapport au palpeur sous l'effet de la force de réaction exercée par ladite périphérie de la came lorsque le doigt est appuyé contre cette came mise en rotation, un élément flexible (51) étant prévu pour déplacer l'extrémité du doigt par rapport au palpeur dans un deuxième sens opposé au premier sens lorsque le doigt n'est pas en appui contre la périphérie de la came, le mécanisme étant agencé de manière à ce que l'élément flexible (51) déplace l'extrémité du doigt dans le deuxième sens par rapport au capteur également lorsque le doigt est dans l'encoche. Mechanism for a timepiece, comprising: a cam (1) whose periphery (11) has a notch (10); a feeler (5) comprising an arm (53) provided with an axis of rotation and a probe head (54) provided with a finger (50) arranged to feel the said periphery, and to fall into the notch (10) when it is found in front of the finger of the probe; the feeler (5) being pivotable about the axis of rotation (52) so as to place the finger in a first position (A) pressed against said periphery (11) of the cam, or by raising the probe in a second position (B) remote from said cam, the finger being mounted on the probe so that its end can move in a first direction relative to the probe under the effect of the reaction force exerted by said periphery of the cam when the finger is pressed against this cam put in rotation, a flexible element (51) being provided for moving the end of the finger relative to the probe in a second direction opposite to the first direction when the finger does not bear against the periphery of the cam, the mechanism being arranged so that the flexible element (51) moves the end of the finger in the second direction relative to the sensor also when the finger is in the notch. Mécanisme selon la revendication 1, dans lequel la distance entre l'extrémité du doigt et l'axe de rotation du sautoir (52) se modifie lorsque le doigt pénètre dans l'encoche.The mechanism of claim 1, wherein the distance between the end of the finger and the axis of rotation of the jumper (52) changes as the finger enters the notch. Mécanisme selon l'une des revendications 1 à 2, dans lequel le doigt peut uniquement être relevé de l'encoche en relevant le palpeur.Mechanism according to one of claims 1 to 2, wherein the finger can only be raised from the notch by raising the probe. Mécanisme selon l'une des revendications 1 à 3, dans lequel ladite portion élastique (51) est liée intégralement au doigt (50).Mechanism according to one of claims 1 to 3, wherein said elastic portion (51) is integrally connected to the finger (50). Mécanisme selon l'une des revendications 1 à 4, ladite portion élastique (51) permettant de modifier la distance entre l'extrémité du doigt (50) et ledit axe de rotation (52).Mechanism according to one of claims 1 to 4, said elastic portion (51) for changing the distance between the end of the finger (50) and said axis of rotation (52). Mécanisme selon l'une des revendications 1 à 5, le palpeur (5) comportant une ouverture (55) avec une première butée (530) d'un côté de l'ouverture et une seconde butée (531) du côté opposé de l'ouverture, la portion élastique (51) étant engagée dans ladite ouverture (55), de manière à ce que le doigt (50) puisse se déplacer entre une première position (A) appuyée contre la première butée, et une seconde position (B) appuyée contre la seconde butée (531).Mechanism according to one of claims 1 to 5, the probe (5) having an opening (55) with a first stop (530) on one side of the opening and a second stop (531) on the opposite side of the opening, the elastic portion (51) being engaged in said opening (55), so that the finger (50) can move between a first position (A) pressed against the first stop, and a second position (B) leaning against the second stop (531). Mécanisme selon la revendication 6, la portion élastique (51) étant agencée pour contraindre le doigt (50) contre la seconde butée (531) lorsque le doigt est libre.Mechanism according to claim 6, the elastic portion (51) being arranged to constrain the finger (50) against the second stop (531) when the finger is free. Mécanisme selon l'une des revendications 6 ou 7, la friction du doigt (50) contre ladite périphérie permettant de repousser le doigt contre la première butée (530).Mechanism according to one of claims 6 or 7, the friction of the finger (50) against said periphery for pushing the finger against the first stop (530). Mécanisme selon l'une des revendications 3 à 8, ladite portion élastique (51) étant agencée de manière à ce que la distance entre le doigt (50) et l'axe de rotation (52) soit plus importante lorsque le palpeur est en première position que lorsque le palpeur est en seconde position.Mechanism according to one of claims 3 to 8, said elastic portion (51) being arranged in such a way that the distance between the finger (50) and the axis of rotation (52) is greater when the feeler is in first position. when the probe is in second position. Mécanisme selon l'une des revendications 1 à 9, l'encoche (10) comportant deux bords (101 ; 102+103) et un fond.Mechanism according to one of claims 1 to 9, the notch (10) having two edges (101; 102 + 103) and a bottom. Mécanisme selon la revendication 10, un des bords (103) de l'encoche (10) étant évasé.Mechanism according to claim 10, one of the edges (103) of the notch (10) being flared. Mécanisme selon l'une des revendications 10 ou 11, agencé de manière à ce que le doigt (50) ne soit pas en contact avec le fond de l'encoche (10) lorsqu'il est dans l'encoche.Mechanism according to one of claims 10 or 11, arranged so that the finger (50) is not in contact with the bottom of the notch (10) when in the slot. Mécanisme selon la revendication 12, agencé de manière à ce que le doigt (50) soit appuyé par l'élément flexible (51) uniquement contre un des bords (102+103) de l'encoche (10) lorsqu'il est dans l'encoche.Mechanism according to claim 12, arranged so that the finger (50) is supported by the flexible element (51) only against one of the edges (102 + 103) of the notch (10) when it is in the notch. Mécanisme selon la revendication 13, agencé de manière à ce que le doigt (50) soit appuyé par l'élément flexible (51) uniquement contre un bord évasé (102+103) de l'encoche (10) lorsqu'il est dans l'encoche.Mechanism according to claim 13, arranged so that the finger (50) is supported by the flexible element (51) only against a flared edge (102 + 103) of the notch (10) when it is in the notch.
EP18151474.6A 2017-01-13 2018-01-12 Mechanism for timepiece comprising a cam and a finger Active EP3349072B1 (en)

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CH00044/17A CH713354B1 (en) 2017-01-13 2017-01-13 Mechanism for a timepiece comprising a cam and a feeler, in particular for a regatta watch or a striking watch.

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3696609A (en) * 1970-03-26 1972-10-10 Marcel Mingard Timepiece having oscillating rotation indicator
FR2304950A1 (en) * 1975-03-18 1976-10-15 Ebauches Sa CALENDAR MECHANISM FOR WATCH PART
WO2007110451A2 (en) * 2006-03-29 2007-10-04 Girard-Perregaux Sa Movement for timepiece with retrograde display
EP2784603A1 (en) * 2013-03-28 2014-10-01 Rolex Sa Device for displaying time information
EP2824521A2 (en) * 2013-07-12 2015-01-14 Rolex Sa Clockwork mechanism, clock movement and timepiece

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3696609A (en) * 1970-03-26 1972-10-10 Marcel Mingard Timepiece having oscillating rotation indicator
FR2304950A1 (en) * 1975-03-18 1976-10-15 Ebauches Sa CALENDAR MECHANISM FOR WATCH PART
WO2007110451A2 (en) * 2006-03-29 2007-10-04 Girard-Perregaux Sa Movement for timepiece with retrograde display
EP2784603A1 (en) * 2013-03-28 2014-10-01 Rolex Sa Device for displaying time information
EP2824521A2 (en) * 2013-07-12 2015-01-14 Rolex Sa Clockwork mechanism, clock movement and timepiece

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CH713354B1 (en) 2022-11-30
CH713354A1 (en) 2018-07-13

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