EP2602675B1 - Timepiece movement comprising a chronograph mechanism with column wheel - Google Patents

Timepiece movement comprising a chronograph mechanism with column wheel Download PDF

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Publication number
EP2602675B1
EP2602675B1 EP11192669.7A EP11192669A EP2602675B1 EP 2602675 B1 EP2602675 B1 EP 2602675B1 EP 11192669 A EP11192669 A EP 11192669A EP 2602675 B1 EP2602675 B1 EP 2602675B1
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EP
European Patent Office
Prior art keywords
push button
lever
pivot
intermediate lever
movement
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
EP11192669.7A
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German (de)
French (fr)
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EP2602675A1 (en
Inventor
Olivier Mertenat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP11192669.7A priority Critical patent/EP2602675B1/en
Priority to US13/693,781 priority patent/US8882338B2/en
Priority to JP2012267870A priority patent/JP5508509B2/en
Priority to RU2012152919/12A priority patent/RU2603591C2/en
Priority to CN201210524669.1A priority patent/CN103163775B/en
Publication of EP2602675A1 publication Critical patent/EP2602675A1/en
Priority to HK13113952.4A priority patent/HK1186534A1/en
Application granted granted Critical
Publication of EP2602675B1 publication Critical patent/EP2602675B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0842—Watches or clocks with stop devices, e.g. chronograph with start-stop 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
    • G04F7/0804—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
    • G04F7/0814—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms with double hammer, i.e. one hammer acts on two counters
    • 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
    • G04F7/0842—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms
    • G04F7/0847—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms with column wheel
    • 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
    • G04F7/0842—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms
    • G04F7/0857—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms with single push-button or actuation member for start-stop and reset

Definitions

  • the present invention relates to a watch movement comprising a three-cycle chronograph mechanism arranged to control a chronograph hand and at least one counter hand so as to turn them on, to stop them, and then to bring them back quickly to their point of contact. departure, at will, by successive pressures on the same push-button.
  • the present invention more specifically relates to such a watch movement comprising a column wheel and in which the successive presses on the push button have the effect of progressively incrementing the angular position of the column wheel.
  • Watch movements are known which correspond to the definition above.
  • the patent document WO 03/040835 in particular, describes a watch movement provided with a chronograph.
  • the Figures 1 and 2 annexed reproduce the figures 3 and 8 of this previous document. These figures are side views of this watch movement of the prior art.
  • the figure 1 shows the movement with the chronograph mechanism in the rest position, and the figure 2 is a similar view showing the reset of the chronograph mechanism.
  • a control lever 1 which is pivotally mounted about a pin screwed into the barrel bridge (the pin and the barrel bridge are not shown in the figures, but the pivot axis is indicated by the sign "+" ).
  • An end 1b of the flip-flop is intended to be connected to a single pusher (not shown).
  • the other end of the control lever ends with a pawl 2 in the form of a hook which is provided to cooperate with a ratchet toothing 4a of the column wheel 4.
  • a first spring (not shown) is provided to recall the latch of command 1 in the rest position shown in the figure 1 .
  • a second spring (not shown) is provided to constantly remind the pawl 2 against the ratchet toothing 4a.
  • a jumper spring 3 is also engaged with the ratchet toothing of the column wheel.
  • the end 1b of the flip-flop 1 is connected to the single pusher.
  • the button of the pusher When a user presses the button of the pusher, he pushes the end 1b of the control lever towards the center of the movement.
  • the rocker being pivoted in its center, the displacement of the end 1b towards the center of the movement is accompanied by a displacement in the opposite direction of the pawl 2.
  • the pawl While moving, the pawl hooks a tooth of the ratchet 4a and causes this tooth towards the outside of the movement. In doing so, he turns the column wheel one step.
  • the rocker is returned to the rest position by the first return spring. During this movement, the hook-shaped pawl 2 slides on the inclined tooth of the ratchet 4a without rotating the column wheel.
  • the patent document US 2005/174888 A1 describes a watch movement according to the preamble of claim 1.
  • This watch movement is adapted to be used as a chess clock. It comprises a chronograph mechanism comprising two timed time counters and control means arranged to engage or trigger one or the other of the counters, and a switching device arranged so that its activation causes the triggering the counter is switched on and the triggered counter is switched on.
  • This chronograph mechanism comprises a considerable number of levers for operating a column wheel as well as selectors.
  • An object of the present invention is to provide an extremely compact pusher mechanism which allows the use of a small push button with a limited stroke to control the column wheel of the chronograph mechanism of a watch movement.
  • the present invention achieves this goal by providing a watch movement according to the appended claim 1.
  • Figures 11 and 12 represent a column wheel 40 adapted to be integrated in a watch movement according to the present invention
  • the latter is essentially formed of a ratchet 42 and four columns 44 evenly distributed to the circumference of the ratchet.
  • the column wheel further comprises a hub 46 designed to be pivotally mounted about an axis of the chronograph mechanism (not shown in FIG. Figures 11 and 12 ).
  • the figure 11 still contains an arrow referenced R and intended to indicate the direction of rotation of the column wheel 40. It will be noted that, in the present example, it is a clockwise direction.
  • the column wheel further comprises four arms 48 which respectively connect the four columns 44 to the hub 46 of the wheel.
  • the columns 44, the arms 48 and the hub 46 thus form a superstructure which has a rotation symmetry of order 4.
  • the ratchet 42 meanwhile, has 12 teeth spaced 30 ° from each other.
  • the perspective view of the figure 12 allows to clearly visualize the hub 46 and the arms 48 which connect the columns to the hub.
  • the presence of the arms and the hub makes it possible to stiffen the structure of the wheel in general, and the columns in particular. It will be understood that a more rigid column wheel allows operation with a particularly high level of precision.
  • the width of the arms at their narrowest point is considerably smaller than the width of the columns (here the width of a column is defined as the distance separating the leading edge from the trailing edge of this column).
  • the width of the arms 48 is less than half the width of the columns 44. In the present example, the width of an arm is even of the order of one third of the width of a column.
  • This feature of the invention makes it possible to arrange voids 45 in the superstructure of the column wheel. These voids are necessary to allow the beaks of the different flip-flops to dive sufficiently deep between the columns.
  • the hub 46 and the arms 48 have a height less than that of the columns 44.
  • the height of the arms will preferably be between 20% and 60% of the height of the columns.
  • An advantage of the latter feature is that it allows to further extend the stroke of the nose of a lever in diving as in lifting, provided that the lever is mounted high enough to allow the passage of the spout over the arms 48 of the column wheel.
  • the column wheel is entirely manufactured on a topper. A manufacture without recovery on a lathe allows to give the piece a remarkable precision.
  • the figure 11 clearly shows the profile of the columns 40.
  • the profile of the columns generally corresponds to a warped ellipse, or more precisely perhaps, to the profile of an airplane wing.
  • leading edge of the columns referring to the direction of rotation of the column wheel
  • trailing edge of the columns will be trailing edge.
  • the columns also have an outer face (facing the outside of the column wheel) and an inner face (facing the hub 46). The outer face and the inner face meet at the leading edge and at the trailing edge.
  • the profile of the columns draws a circular arc substantially concentric with the column wheel. While at the inner face, the profile of the columns has a larger radius of curvature in the trailing edge region than in the leading edge region (as is the case with an airplane wing). classic).
  • ⁇ is defined by the angle that the inside faces with the outside face of a column in the region of the leading edge, and by ⁇ the angle made by the inside face with the outside face of a column. in the region of the trailing edge.
  • ⁇ is defined by the angle that the inside faces with the outside face of a column in the region of the leading edge, and by ⁇ the angle made by the inside face with the outside face of a column. in the region of the trailing edge.
  • the two angles ⁇ and ⁇ are actually very rounded.
  • the fact that the angle ⁇ is very rounded has the advantage of facilitating the progression of the nozzle of a lever cooperating with the column during operation of the chronograph mechanism.
  • the angle ⁇ the fact that the angle is rounded does not really have any technical effect, and according to one variant, the angle ⁇ could be sharp.
  • the angles ⁇ and ⁇ are respectively 58 degrees and 31 degrees.
  • the angle ⁇ may vary, but it is preferably between 55 and 65 degrees.
  • the angle ⁇ for its part, depends on the number of columns contained in the column wheel, and it will preferably be smaller when the columns are longer. many. However, the angle ⁇ will preferably be between 25 and 35 degrees.
  • the width of a column 44 naturally depends on the number of columns contained in the column wheel 40.
  • the columns of the column wheel are wider than the openings arranged between the columns.
  • FIGS 3 to 8 are bottom-side views of a watch movement according to a particular embodiment of the present invention.
  • the watch movement shown is intended to be integrated into a wristwatch. Under these conditions, the crown-push which is represented at the top in the figures, would actually be at three o'clock if one looked at the dial side of a wristwatch containing the movement. It will therefore be understood that since Figures 3 to 8 are bottom-side views, the "noon" position of the watch is on the right side of the figures, and the hour turn extends counter-clockwise in the figures.
  • the Figures 3 to 8 represent the chronograph mechanism at different phases of a complete cycle of its operation.
  • the chronograph mechanism shown comprises in particular a chronograph wheel 1, a clutch rocker 4 having a spout adapted to cooperate with the column wheel, an oscillating pinion 2 pivoted on a lever clutch 3, and two springs (referenced respectively 5a and 5b).
  • the clutch lever is arranged to pivot in either direction so that it alternately causes the disengagement or engagement of the toothing of the oscillating gear 2 with that of the chronograph wheel 1.
  • the pivoting of the The function of the clutch lever 3 is to stop and restart the chronograph.
  • the oscillating pinion 2 is permanently driven by the second mobile movement gear (not shown). Under these conditions, when the chronograph wheel is engaged with the pinion 2, it is driven, and when the oscillating pinion is disengaged from its toothing, the chronograph wheel is disengaged.
  • the function of the spring 5a is to return the clutch lever, and the oscillating pinion which it bears, against the chronograph wheel.
  • the spring 5b it is arranged to recall the nose of the clutch rocker against the column wheel.
  • the clutch rocker 4 carries, at the end opposite the spout, a pin 6 provided to cooperate with a corresponding end of the clutch lever 3. It can be seen first of all that when the tip of the rocker 4 is lowered between two columns, as shown on the figures 4 and 5 in particular, the pin 6 is spaced from the clutch lever. Under these conditions, nothing prevents the spring 5a meshes the oscillating pinion 2 with the toothing of the chronograph wheel 1.
  • the chronograph mechanism shown further comprises a minute counter wheel 15 and an intermediate wheel 12.
  • the counter wheel 15 is driven by the chronograph wheel 1 via the wheel 12.
  • the axis of the chronograph wheel is that of the minute counter wheel both carry a reset heart (referenced respectively 7 and 17).
  • a hammer with two inclines is provided to cooperate with the two hearts.
  • This hammer is formed of a reset rocker 10 and a movable tip in the form of a spreader 9.
  • the movable tip is articulated on one end of the rocker 10 and has two inclined 8a, 8b which are provided to cooperate each with one of the two cores 7, 17.
  • the reset rocker 10 is arranged to pivot, or in one direction to lower the hammer against the hearts, or in the other direction to lift the hammer.
  • a spring 19 is still arranged to return the hammer against the hearts 7, 17 in the rest position.
  • the column wheel 40 which controls the tilting of the hammer.
  • the chronograph mechanism of the present example further comprises a brake constituted by a brake lever 30, one end of which carries a shoe 32 designed to immobilize the chronograph wheel 1 by acting on its periphery.
  • the brake rocker 30 is arranged to rotate alternately between a raised position where the pad 32 is held away from the chronograph wheel is a lowered position where the pad blocks the chronograph wheel.
  • a spring (not shown) is further arranged to recall the pad 32 against the chronograph wheel in the rest position.
  • it is also the column wheel 40 which controls the pivoting of the brake lever 30.
  • the chronograph mechanism of the invention further comprises a mechanism for controlling the column wheel.
  • This mechanism which is the object of the present invention is a push mechanism.
  • the push mechanism is arranged to incrementally increment the angular position of the column wheel 40, when a user actuates the button 67 of the pusher repeatedly.
  • the column wheel 40 is under the action of a column wheel jumper (referenced 50 in the figures 3 and 6 ) which press against the teeth of the ratchet (referenced 42) so as to maintain the column wheel in a stable position.
  • the pusher of the pusher crown 65 is arranged to move axially in the plane of movement when a user actuates the pusher by pressing the button 67 of the pusher crown 65.
  • the pusher thus passes from a rest position (illustrated in the figure 3 particular) to an active position (illustrated in figure 4 especially).
  • the mechanism which, in the example shown, connects the button 67 of the pusher ring 65 to the column wheel 40 comprises a pawl 52, a pawl spring 54, a control lever 56, an intermediate lever 58 and a control spring 60.
  • the pusher ring 65 is disposed at the periphery of the movement, at "3 o'clock".
  • the pusher crown is associated with a winding and setting rod (referenced 71 to the figure 9 ) which extends towards the center of the movement.
  • the intermediate lever 58 is mounted on a pivot 59 (hereinafter called "second pivot") which is fixed on the frame at "4 o'clock", close to the periphery of the movement.
  • the shape of the movement is round.
  • the intermediate lever at 3 o'clock a tongue 62 which is rotated towards the crown-push. This tongue is bent at an angle of about 90 ° towards the dial side of the movement.
  • the tongue thus forms a flag that is approximately facing the crown-push.
  • the pusher has a bearing surface 69 which is arranged to press against the flag so as to actuate the intermediate lever of the control mechanism when the push button is actuated.
  • the control lever 56 is mounted on a first pivot 55 which is fixed to the frame at 1 o'clock.
  • the slightly curved shape of the control lever allows it to extend substantially along the periphery of the movement to the vicinity of the pusher crown.
  • the control rocker 56 and the intermediate lever 58 are pivoted on both sides and away from the thrust ring 65. They extend to meet each other from their respective pivot 55, 59 substantially along the periphery of the movement.
  • the free end of the rocker 56 has a protruding part constituted, in the present example, by a stepped stud 57.
  • the projecting part is arranged to cooperate with the distal end of the intermediate lever 58. More specifically, as illustrated in Figures 3 to 9 , the distal portion of the lever 58 is arranged to bear against the stepped stud 57.
  • the control spring 60 is arranged to cooperate with the control rocker 56 so as to return the free end of the latter towards the periphery of the movement. It will be further understood that because of the presence of the pin 57, the action of the spring 60 also has the effect of biasing the lever 58 outward movement. Conversely, when a user pivots the lever 58 by pressing on the pusher 67, the distal end of this lever pushes the pin 57, thus pivoting the control lever 56. Comparing the figures 3 and 4 for example, it can be seen further that the simultaneous pivoting of the intermediate lever 58 and the control lever 56 is accompanied by a sliding of the stud 57 against the distal portion of the intermediate lever. It will be understood that because of this sliding, when the pusher mechanism passes from the rest position to the active position, the lever arm between the pivot 59 of the intermediate lever and the pin 57 is shortened.
  • FIGs 10a and 10b illustrate the flag-shaped tongue 62 carried by the intermediate lever 58.
  • figure 10a is the superposition of two side views corresponding to two snapshots of the tongue respectively in the rest position and in the active position of the push mechanism.
  • the figure 10b is a front view of the tongue 62 from the side of the crown-push.
  • a clearance is arranged in the left part of the flag. This clearance is positioned in the axis of the winding and setting rod 71, so that it allows the passage of this rod.
  • the tongue has a narrow distal portion 72 (right on the figure 10b ) which is provided to extend on the side of the rod 71, the side of the pivot 59 thereof.
  • the tongue forms a shoulder 74. This shoulder occupies the space between the rod 71 and the main plane of the intermediate lever 58.
  • the figure 9 is the superposition of two snapshots. These two snapshots respectively illustrate the rest position and the active position of the intermediate lever 58 and the post 57. It will be understood that the figure 9 is a view of the movement from the bridge side, the plane of the drawing being parallel to that of the movement. The flag formed by the tongue 62 therefore extends in a plane perpendicular to that of the drawing.
  • the two lines d 'and d "in the drawing are respectively the traces of the plane of the flag in the rest position and the active position of the pusher mechanism.It is seen that in fact an angle ⁇ with the plane of the surface of support 69, while de facto an angle ⁇ with this plane.
  • the angles ⁇ and ⁇ are of opposite sign.
  • the tongue 62 is approximately in the axis of the thrust crown 65.
  • the intermediate lever 58 is pivoted towards the outside of the movement. In this position, the plane of the flag is not quite parallel to the bearing surface 69 of the pusher as evidenced by the angle ⁇ between the trace of and the plane of the bearing surface.
  • the bearing surface 69 begins by pressing against the edge of the tongue near the shoulder 74. From this moment, the pressure of the bearing surface on the tongue has the effect of pivoting the intermediate lever 58 and thus also to rotate the plane of the flag.
  • the free end of the control rocker 56 carries the control rocker pawl (referenced 52).
  • the pawl 52 is pivoted freely on the end of the rocker and is pressed against the ratchet toothing 42 of the column wheel by the pawl spring 54.
  • the pawl 52 is thus arranged to cooperate with the teeth of the ratchet 42, and when under the effect of a pressure on the pusher, the end of the control rocker 56 is caused to pivot towards the center of the movement, the pawl 52 accompanies this movement by pushing a tooth of the ratchet towards the center of the movement .
  • each pressure on the pusher advances the column wheel by the value of a tooth of the ratchet.
  • control lever 56 is lever of the 2nd kind (i.e. "cross-resistance"), and the 52 pawl actuates the column wheel, pushing the teeth of ratchet 42.
  • This arrangement differs from that of conventional pusher mechanisms, wherein, the control lever acts as a lever 1 kind (i.e.
  • cross-bearing wherein the pawl in the form of a hook that actuates the column wheel by pulling a ratchet tooth towards the outside of the movement (as shown in Figures 1 and 2 representing a chronograph mechanism of the prior art).
  • the chronograph mechanism stopped, after being reset. All the elements of the chronograph mechanism are stopped except for the oscillating pinion 2 which is permanently driven by the watch movement (the direction of rotation of the oscillating pinion is indicated by the arrow).
  • the figure 4 illustrates the moment when the chronograph mechanism is turned on.
  • the button 67 of the push-button is depressed and the intermediate lever 58 and the control lever 56 have pivoted towards the center of the movement by driving the pawl 52.
  • This movement of the pawl advances the column wheel 40 by 30 ° clockwise.
  • the rotation of 30 ° of the column wheel has the effect, on the one hand, to raise the spout of the reset lever 10, pivoting it so as to lift the hammer and to release the cores 7, 17.
  • the rotation of the column wheel also has the effect of plunging the nose of the clutch rocker 4 into the space between two columns (referenced 44 on the Figures 9 and 10 ).
  • the figure 5 shows the chronograph mechanism in operation.
  • the button 67 of the pusher ring 65 has returned to its rest position, as are also the intermediate lever 58 and the control lever 56.
  • the pawl 52 has also turned back, and is ready to actuate the next tooth when the pusher will be operated again.
  • the chronograph wheel 1, the intermediate wheel 12 and the wheel of minute counter 15 are rotated by the oscillating pinion 2 in the direction indicated by the arrows in the figure.
  • the figure 6 illustrates the moment of stop of the chronograph mechanism.
  • the push-button 67 is depressed and the intermediate lever 58 and the control lever 56 have again pivoted towards the center of the movement by driving the pawl 52 and rotating a again the column wheel of 30 °.
  • This new incrementation of the column wheel has the effect, on the one hand, to raise the spout of the clutch lever 4, causing the oscillating pinion 2 to disengage from the chronograph wheel 1.
  • the rotation of the column wheel also has the effect of plunging the nose of the brake lever 30 in the space between two columns 44 by pivoting the rocker. As seen above, the pivoting of the rocker 30 lowers the pad 32 against the chronograph wheel 1, so that the pad blocks the chronograph wheel.
  • the figure 7 shows the stopped chronograph mechanism.
  • the push-button button 65 has returned to its rest position, as are also the intermediate lever 58 and the control lever 56.
  • the pawl 52 has also turned back, and is ready to actuate the next tooth when the pusher will be operated again.
  • the shoe 32 of the brake rocker 30 holds the chronograph wheel 1, and the minute counter wheel 15, in the position in which the chronograph mechanism has been stopped, allowing the reading of the time elapsed between the start-up and the stop of the chronograph mechanism.
  • the figure 8 illustrates the moment of resetting the chronograph mechanism.
  • the button 67 is depressed and the intermediate lever 58 as well as the control lever 56 have again pivoted towards the center of the movement by driving the pawl 52 and by incrementing again the column wheel of 30 °.
  • This new displacement of the column wheel has for indeed, on the one hand, to raise the nose of the brake lever 30, causing the shoe 32 to move away from the chronograph wheel 1.
  • the rotation of the column wheel also has to effect of plunging the tip of the reset rocker 10 in the space between two columns 44, thus pivoting the rocker.
  • This pivoting of the rocker has the effect of lowering the two inclined 8a and 8b of the hammer respectively against the two cores 7, 17, so as to bring the chronograph wheel 1 and the minute counter wheel 15 to their starting positions. respectively.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Electromechanical Clocks (AREA)

Description

DOMAINE DE L'INVENTIONFIELD OF THE INVENTION

La présente invention concerne un mouvement horloger comportant un mécanisme de chronographe à trois temps agencé pour commander une aiguille de chronographe et au moins une aiguille de compteur de manière à les mettre en marche, à les arrêter, puis à les ramener rapidement à leur point de départ, à volonté, par des pressions successives sur un même bouton-poussoir. La présente invention concerne plus spécifiquement un tel mouvement horloger comportant une roue à colonnes et dans lequel les pressions successives sur le bouton-poussoir ont pour effet d'incrémenter progressivement la position angulaire de la roue à colonnes.The present invention relates to a watch movement comprising a three-cycle chronograph mechanism arranged to control a chronograph hand and at least one counter hand so as to turn them on, to stop them, and then to bring them back quickly to their point of contact. departure, at will, by successive pressures on the same push-button. The present invention more specifically relates to such a watch movement comprising a column wheel and in which the successive presses on the push button have the effect of progressively incrementing the angular position of the column wheel.

ART ANTERIEURPRIOR ART

On connaît des mouvements horlogers qui correspondent à la définition ci-dessus. Le document de brevet WO 03/040835 notamment, décrit un mouvement de montre muni d'un chronographe. Les figures 1 et 2 annexées reproduisent les figures 3 et 8 de ce document antérieur. Ces figures sont des vues côté fond de ce mouvement horloger de l'art antérieur. La figure 1 montre le mouvement avec le mécanisme de chronographe en position de repos, et la figure 2 est une vue semblable montrant la remise à zéro du mécanisme de chronographe.Watch movements are known which correspond to the definition above. The patent document WO 03/040835 in particular, describes a watch movement provided with a chronograph. The Figures 1 and 2 annexed reproduce the figures 3 and 8 of this previous document. These figures are side views of this watch movement of the prior art. The figure 1 shows the movement with the chronograph mechanism in the rest position, and the figure 2 is a similar view showing the reset of the chronograph mechanism.

On a représenté sur les figures 1 et 2 une bascule de commande 1 qui est montée pivotante autour d'un tenon vissé dans le pont de barillet (le tenon et le pont de barillet ne sont pas représenté sur les figures, mais l'axe de pivotement est indiqué par le signe « + »). Une extrémité 1 b de la bascule est destinée à être reliée à un poussoir unique (non représenté). L'autre extrémité de la bascule de commande se termine par un cliquet 2 en forme de crochet qui est prévu pour coopérer avec une denture rochet 4a de la roue à colonnes 4. Un premier ressort (non représenté) est prévu pour rappeler la bascule de commande 1 dans la position de repos représentée dans la figure 1. Un deuxième ressort (non représenté) est prévue pour rappeler constamment le cliquet 2 contre la denture rochet 4a. Finalement, un ressort sautoir 3 est également en prise avec la denture rochet de la roue à colonnes.We have shown on Figures 1 and 2 a control lever 1 which is pivotally mounted about a pin screwed into the barrel bridge (the pin and the barrel bridge are not shown in the figures, but the pivot axis is indicated by the sign "+" ). An end 1b of the flip-flop is intended to be connected to a single pusher (not shown). The other end of the control lever ends with a pawl 2 in the form of a hook which is provided to cooperate with a ratchet toothing 4a of the column wheel 4. A first spring (not shown) is provided to recall the latch of command 1 in the rest position shown in the figure 1 . A second spring (not shown) is provided to constantly remind the pawl 2 against the ratchet toothing 4a. Finally, a jumper spring 3 is also engaged with the ratchet toothing of the column wheel.

Le fonctionnement du mécanisme de poussoir prévu pour actionner manuellement la roue à colonnes 4 va maintenant être décrit. Comme on l'a déjà dit, l'extrémité 1 b de la bascule 1 est reliée à l'unique poussoir. Lorsqu'un utilisateur presse sur le bouton du poussoir, il repousse l'extrémité 1 b de la bascule de commande en direction du centre du mouvement. La bascule étant pivotée en son centre, le déplacement de l'extrémité 1 b en direction du centre du mouvement s'accompagne d'un déplacement en sens inverse du cliquet 2. En se déplaçant, le cliquet accroche une dent du rochet 4a et entraîne cette dent en direction de l'extérieur du mouvement. Ce faisant, il fait tourner d'un pas la roue à colonnes. Lorsque l'utilisateur relâche sa pression sur le poussoir, la bascule est ramenée en position de repos par le premier ressort de rappel. Durant ce mouvement, le cliquet 2 en forme de crochet glisse sur l'incliné d'une dent du rochet 4a sans faire tourner la roue à colonnes.The operation of the pusher mechanism intended to manually operate the column wheel 4 will now be described. As already mentioned, the end 1b of the flip-flop 1 is connected to the single pusher. When a user presses the button of the pusher, he pushes the end 1b of the control lever towards the center of the movement. The rocker being pivoted in its center, the displacement of the end 1b towards the center of the movement is accompanied by a displacement in the opposite direction of the pawl 2. While moving, the pawl hooks a tooth of the ratchet 4a and causes this tooth towards the outside of the movement. In doing so, he turns the column wheel one step. When the user releases its pressure on the pusher, the rocker is returned to the rest position by the first return spring. During this movement, the hook-shaped pawl 2 slides on the inclined tooth of the ratchet 4a without rotating the column wheel.

En se référant encore aux figures 1 et 2, on peut observer que la bascule de commande 1 prend une place considérable à la périphérie du mouvement. Le document WO 03/040835 explique que la forme du mécanisme de chronographe représenté lui permet d'être associé à un mouvement horloger de forme non circulaire. Pour réaliser une montre ronde qui intègre ce genre de mécanisme de chronographe, les horlogers n'ont souvent pas d'autre recours que d'utiliser une boîte de montre plus grande que le mouvement, ils insèrent un cercle d'agrandissement prévu pour centrer le mouvement dans la boîte de forme ronde. Un inconvénient de cette solution est qu'elle permet uniquement de réaliser des montre-chronographe de relativement grandes dimensions.Referring again to Figures 1 and 2 it can be seen that the control lever 1 takes a considerable place at the periphery of the movement. The document WO 03/040835 explains that the shape of the chronograph mechanism depicted allows it to be associated with a watch movement of non-circular shape. To make a round watch that incorporates this kind of chronograph mechanism, watchmakers often have no other recourse than to use a watch case larger than the movement, they insert a circle of enlargement intended to center the movement in the box of round shape. A disadvantage of this solution is that it only allows to make chronograph watches of relatively large dimensions.

Le document de brevet US 2005/174888 A1 décrit un mouvement horloger selon le préambule de la revendication 1. Ce mouvement horloger est adapté pour être utilisé comme pendule d'échecs. Il comprend un mécanisme de chronographe comportant deux compteurs de temps chronométrés et des moyens de commandes agencés de manière à enclencher ou déclencher l'un ou l'autre des compteurs, et un dispositif de commutation agencé de manière à ce que son activation provoque le déclenchement du compteur enclenché et l'enclenchement du compteur déclenché. Ce mécanisme de chronographe comporte un nombre considérable de leviers pour actionner une roue à colonnes ainsi que des sélecteurs.The patent document US 2005/174888 A1 describes a watch movement according to the preamble of claim 1. This watch movement is adapted to be used as a chess clock. It comprises a chronograph mechanism comprising two timed time counters and control means arranged to engage or trigger one or the other of the counters, and a switching device arranged so that its activation causes the triggering the counter is switched on and the triggered counter is switched on. This chronograph mechanism comprises a considerable number of levers for operating a column wheel as well as selectors.

BREF EXPOSE DE L'INVENTIONBRIEF SUMMARY OF THE INVENTION

Un but de la présente invention est de fournir un mécanisme à poussoir extrêmement compact et permettant l'utilisation d'un bouton-poussoir de petite dimension avec une course limitée pour commander la roue à colonne du mécanisme du chronographe d'un mouvement horloger. La présente invention atteint ce but en fournissant un mouvement horloger conforme à la revendication 1 annexée.An object of the present invention is to provide an extremely compact pusher mechanism which allows the use of a small push button with a limited stroke to control the column wheel of the chronograph mechanism of a watch movement. The present invention achieves this goal by providing a watch movement according to the appended claim 1.

BREVES DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple non limitatif, et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en plan de dessus d'un mécanisme de chronographe à trois temps de l'art antérieur au repos ;
  • la figure 2 est une vue semblable à la figure 1 du mécanisme de chronographe lors de la remise à zéro ;
  • la figure 3 est une vue en plan d'un mécanisme de chronographe correspondant à un mode de réalisation particulier de la présente invention, le mécanisme de chronographe étant mis à zéro, prêt à démarrer ;
  • la figure 4 est une vue en plan du mécanisme de chronographe de la figure 3 à l'instant de la mise en marche ;
  • la figure 5 est une vue en plan du mécanisme de chronographe des figures 3 et 4 durant la marche ;
  • la figure 6 est une vue en plan du mécanisme de chronographe des figures 3 à 5, à l'instant de l'arrêt ;
  • la figure 7 est une vue en plan du mécanisme de chronographe des figures 3 à 6, à l'arrêt ;
  • la figure 8 est une vue en plan du mécanisme de chronographe des figures 3 à 7, à l'instant de la remise à zéro ;
  • la figure 9 est une vue partielle en plan qui correspond à la superposition de deux instantanés. Ces deux instantanés illustrent respectivement la position de repos et la position active du mécanisme à poussoir ;
  • les figures 10a et 10b sont des vues d'une languette en forme de drapeau faisant partie du mécanisme à poussoir ;
  • la figure 11 est une vue en plan de dessus de la roue à colonnes du mécanisme de chronographe des figures 3 à 8 ;
  • la figure 12 est une vue en perspective de la roue à colonnes de la figure 11.
Other features and advantages of the present invention will appear on reading the following description, given solely by way of non-limiting example, and with reference to the appended drawings in which:
  • the figure 1 is a top plan view of a three-stroke chronograph mechanism of the prior art at rest;
  • the figure 2 is a view similar to the figure 1 the chronograph mechanism when resetting;
  • the figure 3 is a plan view of a chronograph mechanism corresponding to a particular embodiment of the present invention, the chronograph mechanism being set to zero, ready to start;
  • the figure 4 is a plan view of the chronograph mechanism of the figure 3 at the moment of start-up;
  • the figure 5 is a plan view of the chronograph mechanism of the figures 3 and 4 during the walk;
  • the figure 6 is a plan view of the chronograph mechanism of the Figures 3 to 5 , at the moment of the judgment;
  • the figure 7 is a plan view of the chronograph mechanism of the Figures 3 to 6 , stopped ;
  • the figure 8 is a plan view of the chronograph mechanism of the Figures 3 to 7 at the moment of resetting;
  • the figure 9 is a partial plan view that corresponds to the superposition of two snapshots. These two snapshots respectively illustrate the rest position and the active position of the push mechanism;
  • the Figures 10a and 10b are views of a flag-shaped tongue forming part of the pusher mechanism;
  • the figure 11 is a top plan view of the column wheel of the chronograph mechanism of the Figures 3 to 8 ;
  • the figure 12 is a perspective view of the column wheel of the figure 11 .

DESCRIPTION DETAILLEE D'UN MODE DE REALISATIONDETAILED DESCRIPTION OF AN EMBODIMENT

En se référant tout d'abord aux figures 11 et 12 qui représentent une roue à colonnes 40 adaptée pour être intégrée dans un mouvement horloger conforme à la présente invention, on peut voir que cette dernière est essentiellement formée d'un rochet 42 et de quatre colonnes 44 réparties de manière régulière à la circonférence du rochet. La roue à colonnes comporte encore un moyeu 46 prévu pour être monté pivotant autour d'un axe du mécanisme de chronographe (non représenté sur les figures 11 et 12). La figure 11 contient encore une flèche référencée R et destinée à indiquer le sens de rotation de la roue à colonnes 40. On notera que, dans le présent exemple, il s'agit du sens horaire.Referring first to Figures 11 and 12 which represent a column wheel 40 adapted to be integrated in a watch movement according to the present invention, we can see that the latter is essentially formed of a ratchet 42 and four columns 44 evenly distributed to the circumference of the ratchet. The column wheel further comprises a hub 46 designed to be pivotally mounted about an axis of the chronograph mechanism (not shown in FIG. Figures 11 and 12 ). The figure 11 still contains an arrow referenced R and intended to indicate the direction of rotation of the column wheel 40. It will be noted that, in the present example, it is a clockwise direction.

Dans l'exemple représenté, la roue à colonnes comporte encore quatre bras 48 qui relient respectivement les quatre colonnes 44 au moyeu 46 de la roue. Les colonnes 44, les bras 48 et le moyeu 46 forment ainsi une superstructure qui possède une symétrie de rotation d'ordre 4. Le rochet 42, quant à lui, compte 12 dents espacées de 30° l'une de l'autre. L'homme du métier comprendra donc que la roue à colonnes du présent exemple est bien une roue à colonnes à 12/4 de temps (3 temps).In the example shown, the column wheel further comprises four arms 48 which respectively connect the four columns 44 to the hub 46 of the wheel. The columns 44, the arms 48 and the hub 46 thus form a superstructure which has a rotation symmetry of order 4. The ratchet 42, meanwhile, has 12 teeth spaced 30 ° from each other. Those skilled in the art will therefore understand that the column wheel of the present example is indeed a column wheel 12/4 time (3 times).

La vue en perspective de la figure 12 permet de bien visualiser le moyeu 46 et les bras 48 qui relient les colonnes au moyeu. La présence des bras et du moyeu permet de rigidifier la structure de la roue en général, et les colonnes en particulier. On comprendra qu'une roue à colonnes plus rigide permet un fonctionnement avec un niveau de précision particulièrement élevé. On peut encore observer que la largeur des bras à leur point le plus étroit est considérablement inférieure à la largeur des colonnes (on définit ici la largeur d'une colonne comme la distance séparant le bord d'attaque du bord de fuite de cette colonne). Selon l'invention, la largeur des bras 48 est inférieure à la moitié de la largeur des colonnes 44. Dans le présent exemple, la largeur d'un bras est même de l'ordre du tiers de la largeur d'une colonne. Cette caractéristique de l'invention permet d'aménager des vides 45 dans la superstructure de la roue à colonnes. Ces vides sont nécessaires pour permettre aux becs des différentes bascules de plonger suffisamment profondément entre les colonnes.The perspective view of the figure 12 allows to clearly visualize the hub 46 and the arms 48 which connect the columns to the hub. The presence of the arms and the hub makes it possible to stiffen the structure of the wheel in general, and the columns in particular. It will be understood that a more rigid column wheel allows operation with a particularly high level of precision. It can still be observed that the width of the arms at their narrowest point is considerably smaller than the width of the columns (here the width of a column is defined as the distance separating the leading edge from the trailing edge of this column). . According to the invention, the width of the arms 48 is less than half the width of the columns 44. In the present example, the width of an arm is even of the order of one third of the width of a column. This feature of the invention makes it possible to arrange voids 45 in the superstructure of the column wheel. These voids are necessary to allow the beaks of the different flip-flops to dive sufficiently deep between the columns.

On peut encore voir sur la figure 12 que le moyeu 46 et les bras 48 ont une hauteur inférieure à celle des colonnes 44. La hauteur des bras sera de préférence comprise entre 20% et 60% de la hauteur des colonnes. Un avantage de cette dernière caractéristique est qu'elle permet d'allonger encore la course du bec d'un levier en plongée comme en levée, pour autant que ce levier soit monté suffisamment haut pour permettre le passage du bec au dessus des bras 48 de la roue à colonnes. De préférence, on fabrique entièrement la roue à colonnes sur une décolleteuse. Une fabrication sans reprise sur une décolleteuse permet de donner à la pièce une précision remarquable.We can still see on the figure 12 that the hub 46 and the arms 48 have a height less than that of the columns 44. The height of the arms will preferably be between 20% and 60% of the height of the columns. An advantage of the latter feature is that it allows to further extend the stroke of the nose of a lever in diving as in lifting, provided that the lever is mounted high enough to allow the passage of the spout over the arms 48 of the column wheel. Preferably, the column wheel is entirely manufactured on a topper. A manufacture without recovery on a lathe allows to give the piece a remarkable precision.

La figure 11 montre clairement le profil des colonnes 40. On peut observer que le profil des colonnes correspond de façon générale à une ellipse gauchie, ou plus précisément peut-être, au profil d'une aile d'avion. On désignera donc par bord d'attaque le côté avant des colonnes (en se référant au sens de rotation de la roue à colonnes), et par bord de fuite le bord arrière des colonnes. Les colonnes présentent également une face extérieure (tournée vers l'extérieure de la roue à colonnes) et une face intérieure (tournée vers le moyeu 46). La face extérieure et la face intérieure se rejoigne au niveau du bord d'attaque et au niveau du bord de fuite. On peut observer qu'en ce qui concerne leur face extérieure, le profil des colonnes dessine un arc de cercle sensiblement concentrique à la roue à colonnes. Tandis qu'au niveau de la face intérieure, le profil des colonnes présente un rayon de courbure plus grand dans la région du bord de fuite que dans la région du bord d'attaque (comme c'est le cas avec une aile d'avion classique).The figure 11 clearly shows the profile of the columns 40. It can be observed that the profile of the columns generally corresponds to a warped ellipse, or more precisely perhaps, to the profile of an airplane wing. Thus, the leading edge of the columns (referring to the direction of rotation of the column wheel) will be designated by leading edge, and the trailing edge of the columns will be trailing edge. The columns also have an outer face (facing the outside of the column wheel) and an inner face (facing the hub 46). The outer face and the inner face meet at the leading edge and at the trailing edge. It can be observed that with regard to their outer face, the profile of the columns draws a circular arc substantially concentric with the column wheel. While at the inner face, the profile of the columns has a larger radius of curvature in the trailing edge region than in the leading edge region (as is the case with an airplane wing). classic).

Sur la figure 11, on a désigné par α l'angle que fait la face intérieure avec la face extérieure d'une colonne dans la région du bord d'attaque, et par β l'angle que fait la face intérieure avec la face extérieure d'une colonne dans la région du bord de fuite. On peut voir sur la figure 11 que les deux angles α et β sont en réalité très arrondis. Le fait que l'angle α soit très arrondi présent l'avantage de faciliter la progression du bec d'un levier coopérant avec la colonne lors du fonctionnement du mécanisme de chronographe. Concernant l'angle β, le fait que l'angle soit arrondi n'a pas vraiment d'effet technique, et selon une variante, l'angle β pourrait être tranchant. Dans l'exemple illustré, les angles α et β valent respectivement 58 degrés et 31 degrés. Selon diverses variantes de réalisation, l'angle α peut varier, mais il est de préférence compris entre 55 et 65 degrés. L'angle β, quant à lui, dépend du nombre de colonnes que comporte la roue à colonnes, et il sera de préférence plus petit lorsque les colonnes sont plus nombreuses. Toutefois, l'angle β sera de préférence compris entre 25 et 35 degrés.On the figure 11 α is defined by the angle that the inside faces with the outside face of a column in the region of the leading edge, and by β the angle made by the inside face with the outside face of a column. in the region of the trailing edge. We can see on the figure 11 that the two angles α and β are actually very rounded. The fact that the angle α is very rounded has the advantage of facilitating the progression of the nozzle of a lever cooperating with the column during operation of the chronograph mechanism. Regarding the angle β, the fact that the angle is rounded does not really have any technical effect, and according to one variant, the angle β could be sharp. In the illustrated example, the angles α and β are respectively 58 degrees and 31 degrees. According to various alternative embodiments, the angle α may vary, but it is preferably between 55 and 65 degrees. The angle β, for its part, depends on the number of columns contained in the column wheel, and it will preferably be smaller when the columns are longer. many. However, the angle β will preferably be between 25 and 35 degrees.

Finalement, la largeur d'une colonne 44 dépend naturellement du nombre de colonnes que comporte la roue à colonnes 40. Toutefois, selon l'invention, les colonnes de la roue à colonnes sont plus larges que les ouvertures aménagées entre les colonnes.Finally, the width of a column 44 naturally depends on the number of columns contained in the column wheel 40. However, according to the invention, the columns of the column wheel are wider than the openings arranged between the columns.

Les figures 3 à 8 sont des vues côté fond d'un mouvement horloger selon un mode de réalisation particulier de la présente invention. Le mouvement horloger représenté est prévu pour être intégré à une montre-bracelet. Dans ces conditions, la couronne-poussoir qui est représentée en haut sur les figures, se situerait en fait à trois heures si l'on regardait le côté cadran d'une montre-bracelet contenant le mouvement. On comprendra donc que, puisque les figures 3 à 8 sont des vues du côté fond, la position « midi » de la montre se trouve du côté droite des figures, et le tour d'heures s'étend dans le sens antihoraire sur les figures.The Figures 3 to 8 are bottom-side views of a watch movement according to a particular embodiment of the present invention. The watch movement shown is intended to be integrated into a wristwatch. Under these conditions, the crown-push which is represented at the top in the figures, would actually be at three o'clock if one looked at the dial side of a wristwatch containing the movement. It will therefore be understood that since Figures 3 to 8 are bottom-side views, the "noon" position of the watch is on the right side of the figures, and the hour turn extends counter-clockwise in the figures.

Les figures 3 à 8 représentent le mécanisme de chronographe à différentes phases d'un cycle complet de son fonctionnement. En plus de la roue à colonnes 40 déjà décrite, le mécanisme de chronographe représenté comprend notamment une roue de chronographe 1, une bascule d'embrayage 4 présentant un bec prévu pour coopérer avec la roue à colonnes, un pignon oscillant 2 pivoté sur un levier d'embrayage 3, et deux ressorts (référencés respectivement 5a et 5b). Le levier d'embrayage est agencé pour pivoter dans sens ou dans l'autre de sorte qu'il provoque alternativement le dégagement ou l'engagement de la denture du pignon oscillant 2 d'avec celle de la roue de chronographe 1. Le pivotement du levier d'embrayage 3 a pour fonction de permettre l'arrêt et la remise en marche du chronographe. En effet, le pignon oscillant 2 est entraîné en permanence par le mobile de seconde du rouage du mouvement (non représenté). Dans ces conditions, lorsque la roue de chronographe est en prise avec le pignon 2, elle est entraînée, et lorsque le pignon oscillant est désengagé de sa denture, la roue de chronographe est débrayée.The Figures 3 to 8 represent the chronograph mechanism at different phases of a complete cycle of its operation. In addition to the column wheel 40 already described, the chronograph mechanism shown comprises in particular a chronograph wheel 1, a clutch rocker 4 having a spout adapted to cooperate with the column wheel, an oscillating pinion 2 pivoted on a lever clutch 3, and two springs (referenced respectively 5a and 5b). The clutch lever is arranged to pivot in either direction so that it alternately causes the disengagement or engagement of the toothing of the oscillating gear 2 with that of the chronograph wheel 1. The pivoting of the The function of the clutch lever 3 is to stop and restart the chronograph. Indeed, the oscillating pinion 2 is permanently driven by the second mobile movement gear (not shown). Under these conditions, when the chronograph wheel is engaged with the pinion 2, it is driven, and when the oscillating pinion is disengaged from its toothing, the chronograph wheel is disengaged.

Le ressort 5a a pour fonction de rappeler le levier d'embrayage, et le pignon oscillant qu'il porte, contre la roue de chronographe. Quant au ressort 5b, il est agencé pour rappeler le bec de la bascule d'embrayage contre la roue à colonnes. On peut voir en outre sur les figures que la bascule d'embrayage 4 porte, à l'extrémité opposée au bec, une goupille 6 prévue pour coopérer avec une extrémité correspondante du levier d'embrayage 3. On peut voir tout d'abord que lorsque le bec de la bascule 4 est abaissé entre deux colonnes, comme représenté sur les figures 4 et 5 notamment, la goupille 6 est écartée du levier d'embrayage. Dans ces conditions, rien ne s'oppose à ce que le ressort 5a fasse engrener le pignon oscillant 2 avec la denture de la roue de chronographe 1. A l'inverse, lorsque le bec de la bascule d'embrayage est soulevé par une colonne de la roue à colonnes, comme représenté à la figure 3 notamment, la goupille 6 force le levier d'embrayage 3 à pivoter, ce qui a pour effet d'écarter le pignon oscillant 2 de la denture de la roue de chronographe. C'est donc la roue à colonnes 40 qui commande l'embrayage et le débrayage de la roue de chronographe 1.The function of the spring 5a is to return the clutch lever, and the oscillating pinion which it bears, against the chronograph wheel. As for the spring 5b, it is arranged to recall the nose of the clutch rocker against the column wheel. It can further be seen in the figures that the clutch rocker 4 carries, at the end opposite the spout, a pin 6 provided to cooperate with a corresponding end of the clutch lever 3. It can be seen first of all that when the tip of the rocker 4 is lowered between two columns, as shown on the figures 4 and 5 in particular, the pin 6 is spaced from the clutch lever. Under these conditions, nothing prevents the spring 5a meshes the oscillating pinion 2 with the toothing of the chronograph wheel 1. Conversely, when the spout of the clutch rocker is lifted by a column of the column wheel, as shown in figure 3 in particular, the pin 6 forces the clutch lever 3 to rotate, which has the effect of moving the oscillating pinion 2 of the toothing of the chronograph wheel. It is therefore the column wheel 40 which controls the clutch and the disengagement of the chronograph wheel 1.

Le mécanisme de chronographe représenté comprend encore une roue de compteur de minutes 15 et une roue intermédiaire 12. La roue de compteur 15 est entraînée par la roue de chronographe 1 par l'intermédiaire de la roue 12. On peut voir encore que l'axe de la roue de chronographe est celui de la roue de compteur des minutes portent tout deux un coeur de remise à zéro (référencés respectivement 7 et 17). Un marteau à deux inclinés est prévu pour coopérer avec les deux coeurs. Ce marteau est formé d'une bascule de remise à zéro 10 et d'une panne mobile en forme de palonnier 9. La panne mobile est articulée sur une extrémité de la bascule 10 et elle présente deux inclinés 8a, 8b qui sont prévus pour coopérer chacun avec l'un des deux coeurs 7, 17. De façon connue en soi, la bascule de remise à zéro 10 est agencée pour pivoter, soit dans un sens pour abaisser le marteau contre les coeurs, soit dans l'autre sens pour soulever le marteau. Un ressort 19 est encore agencé pour rappeler le marteau contre les coeurs 7, 17 en position de repos. Enfin, c'est également la roue à colonnes 40 qui commande le basculement du marteau.The chronograph mechanism shown further comprises a minute counter wheel 15 and an intermediate wheel 12. The counter wheel 15 is driven by the chronograph wheel 1 via the wheel 12. It can still be seen that the axis of the chronograph wheel is that of the minute counter wheel both carry a reset heart (referenced respectively 7 and 17). A hammer with two inclines is provided to cooperate with the two hearts. This hammer is formed of a reset rocker 10 and a movable tip in the form of a spreader 9. The movable tip is articulated on one end of the rocker 10 and has two inclined 8a, 8b which are provided to cooperate each with one of the two cores 7, 17. In a manner known per se, the reset rocker 10 is arranged to pivot, or in one direction to lower the hammer against the hearts, or in the other direction to lift the hammer. A spring 19 is still arranged to return the hammer against the hearts 7, 17 in the rest position. Finally, it is also the column wheel 40 which controls the tilting of the hammer.

Le mécanisme de chronographe du présent exemple comprend encore un frein constitué par une bascule de frein 30 dont l'une des extrémités porte un patin 32 prévu pour immobiliser la roue de chronographe 1 en agissant sur son pourtour. De façon conventionnelle, la bascule de frein 30 est agencée pour pivoter alternativement entre une position levée où le patin 32 est tenu écarté de la roue de chronographe est une position abaissée où le patin bloque la roue de chronographe. Un ressort (non représenté) est encore arrangé pour rappeler le patin 32 contre la roue de chronographe en position de repos. D'autre part, c'est également la roue à colonnes 40 qui commande le pivotement de la bascule de frein 30.The chronograph mechanism of the present example further comprises a brake constituted by a brake lever 30, one end of which carries a shoe 32 designed to immobilize the chronograph wheel 1 by acting on its periphery. Conventionally, the brake rocker 30 is arranged to rotate alternately between a raised position where the pad 32 is held away from the chronograph wheel is a lowered position where the pad blocks the chronograph wheel. A spring (not shown) is further arranged to recall the pad 32 against the chronograph wheel in the rest position. On the other hand, it is also the column wheel 40 which controls the pivoting of the brake lever 30.

Le mécanisme de chronographe de l'invention comporte encore un mécanisme pour commander la roue à colonnes. Ce mécanisme qui est l'objet de la présente invention est un mécanisme à poussoir. De façon classique, le mécanisme à poussoir est agencé pour faire s'incrémenter progressivement la position angulaire de la roue à colonnes 40, lorsqu'un utilisateur actionne le bouton 67 du poussoir de façon répétée. D'autre part, la roue à colonnes 40 est sous l'action d'un sautoir de roue à colonnes (référencé 50 dans les figures 3 et 6) qui presse contre les dents du rochet (référencées 42) de manière à maintenir la roue à colonnes dans une position stable.The chronograph mechanism of the invention further comprises a mechanism for controlling the column wheel. This mechanism which is the object of the present invention is a push mechanism. Conventionally, the push mechanism is arranged to incrementally increment the angular position of the column wheel 40, when a user actuates the button 67 of the pusher repeatedly. On the other hand, the column wheel 40 is under the action of a column wheel jumper (referenced 50 in the figures 3 and 6 ) which press against the teeth of the ratchet (referenced 42) so as to maintain the column wheel in a stable position.

Le poussoir de la couronne-poussoir 65 est agencé pour se déplacer axialement dans le plan du mouvement lorsqu'un utilisateur actionne le poussoir en pressant sur le bouton 67 de la couronne poussoir 65. Le poussoir passe ainsi d'une position de repos (illustrée dans la figure 3 notamment) à une position active (illustrée dans la figure 4 notamment). Le mécanisme qui, dans l'exemple représenté, relie le bouton 67 de la couronne-poussoir 65 à la roue à colonnes 40 comprend un cliquet 52, un ressort de cliquet 54, une bascule de commande 56, un levier intermédiaire de commande 58 et un ressort de commande 60. Comme on l'a déjà dit, dans le présent exemple, la couronne-poussoir 65 est disposée à la périphérie du mouvement, à « 3 heures ». La couronne-poussoir est associée à une tige de remontage et de mise à l'heure (référencée 71 à la figure 9) qui s'étend en direction du centre du mouvement. Le levier intermédiaire 58 est monté sur un pivot 59 (appelé ci-après « second pivot ») qui est fixé sur le bâti, à « 4 heures », proche de la périphérie du mouvement. Dans le présent exemple, la forme du mouvement est ronde. Ainsi, la forme légèrement recourbée du levier 58 lui permet de s'étendre sensiblement le long de la périphérie du mouvement dans l'intervalle entre « 4 à 2 heures ». Le levier intermédiaire porte à 3 heures une languette 62 qui est tournée en direction de la couronne-poussoir. Cette languette est recourbée selon un angle d'environ 90° en direction du côté cadran du mouvement. La languette forme ainsi un drapeau qui fait approximativement face à la couronne-poussoir. Comme on le verra plus en détail plus loin, le poussoir comporte une surface d'appui 69 qui est agencée pour venir presser contre le drapeau de manière à actionner le levier intermédiaire du mécanisme de commande lorsque le bouton-poussoir est actionné.The pusher of the pusher crown 65 is arranged to move axially in the plane of movement when a user actuates the pusher by pressing the button 67 of the pusher crown 65. The pusher thus passes from a rest position (illustrated in the figure 3 particular) to an active position (illustrated in figure 4 especially). The mechanism which, in the example shown, connects the button 67 of the pusher ring 65 to the column wheel 40 comprises a pawl 52, a pawl spring 54, a control lever 56, an intermediate lever 58 and a control spring 60. As already mentioned, in the present example, the pusher ring 65 is disposed at the periphery of the movement, at "3 o'clock". The pusher crown is associated with a winding and setting rod (referenced 71 to the figure 9 ) which extends towards the center of the movement. The intermediate lever 58 is mounted on a pivot 59 (hereinafter called "second pivot") which is fixed on the frame at "4 o'clock", close to the periphery of the movement. In this example, the shape of the movement is round. Thus, the slightly curved shape of the lever 58 allows it to extend substantially along the periphery of the movement in the interval between "4 to 2 hours". The intermediate lever at 3 o'clock a tongue 62 which is rotated towards the crown-push. This tongue is bent at an angle of about 90 ° towards the dial side of the movement. The tongue thus forms a flag that is approximately facing the crown-push. As will be seen in more detail below, the pusher has a bearing surface 69 which is arranged to press against the flag so as to actuate the intermediate lever of the control mechanism when the push button is actuated.

La bascule de commande 56 est montée sur un premier pivot 55 qui est fixé sur le bâti à 1 heure. On peut voir sur la figure 3 notamment que la forme légèrement recourbée de la bascule de commande lui permet de s'étendre sensiblement le long de la périphérie du mouvement jusqu'à proximité de la couronne-poussoir. Ainsi, en résumé, la bascule de commande 56 et le levier intermédiaire 58 sont pivotés de part et d'autre et à distance de la couronne-poussoir 65. Ils s'étendent à la rencontre l'un de l'autre à partir de leur pivot respectif 55, 59, sensiblement le long de la périphérie du mouvement. On peut voir encore sur les figures que l'extrémité libre de la bascule 56 présente une partie saillante constituée, dans le présent exemple, par un tenon étagé 57. La partie saillante est arrangée pour coopérer avec l'extrémité distale du levier intermédiaire 58. Plus précisément, comme illustré sur les figures 3 à 9, la portion distale du levier 58 est agencée pour venir en appui contre le tenon étagé 57.The control lever 56 is mounted on a first pivot 55 which is fixed to the frame at 1 o'clock. We can see on the figure 3 in particular that the slightly curved shape of the control lever allows it to extend substantially along the periphery of the movement to the vicinity of the pusher crown. Thus, in summary, the control rocker 56 and the intermediate lever 58 are pivoted on both sides and away from the thrust ring 65. They extend to meet each other from their respective pivot 55, 59 substantially along the periphery of the movement. It can be seen again in the figures that the free end of the rocker 56 has a protruding part constituted, in the present example, by a stepped stud 57. The projecting part is arranged to cooperate with the distal end of the intermediate lever 58. More specifically, as illustrated in Figures 3 to 9 , the distal portion of the lever 58 is arranged to bear against the stepped stud 57.

Le ressort de commande 60 est agencé pour coopérer avec la bascule de commande 56 de manière à rappeler l'extrémité libre de cette dernière en direction de la périphérie du mouvement. On comprendra de plus qu'en raison de la présence du tenon 57, l'action du ressort 60 a également pour effet de rappeler le levier 58 vers l'extérieur du mouvement. Inversement, lorsqu'un utilisateur fait pivoter le levier 58 en pressant sur le poussoir 67, l'extrémité distale de ce levier vient pousser le tenon 57, faisant ainsi pivoter la bascule de commande 56. En comparant les figures 3 et 4 par exemple, on peut voir en outre que le pivotement simultané du levier intermédiaire 58 et de la bascule de commande 56 s'accompagne d'un glissement du tenon 57 contre la portion distale du levier intermédiaire. On comprendra qu'en raison de ce glissement, lorsque le mécanisme à poussoir passe de la position de repos à la position active, le bras de levier entre le pivot 59 du levier intermédiaire et le tenon 57 se raccourcit.The control spring 60 is arranged to cooperate with the control rocker 56 so as to return the free end of the latter towards the periphery of the movement. It will be further understood that because of the presence of the pin 57, the action of the spring 60 also has the effect of biasing the lever 58 outward movement. Conversely, when a user pivots the lever 58 by pressing on the pusher 67, the distal end of this lever pushes the pin 57, thus pivoting the control lever 56. Comparing the figures 3 and 4 for example, it can be seen further that the simultaneous pivoting of the intermediate lever 58 and the control lever 56 is accompanied by a sliding of the stud 57 against the distal portion of the intermediate lever. It will be understood that because of this sliding, when the pusher mechanism passes from the rest position to the active position, the lever arm between the pivot 59 of the intermediate lever and the pin 57 is shortened.

Les figures 10a et 10b illustrent la languette 62 en forme de drapeau que porte le levier intermédiaire 58. La figure 10a est la superposition de deux vues de côté correspondant à deux instantanés de la languette respectivement en position de repos et en position active du mécanisme à poussoir. La figure 10b est une vue de face de la languette 62 depuis le côté de la couronne-poussoir. On voit notamment sur cette figure qu'un dégagement est aménagé dans la partie gauche du drapeau. Ce dégagement est positionné dans l'axe de la tige de remontage et de mise à l'heure 71, de sorte qu'il permet le passage de cette tige. D'autre part, on voit que la languette possède une partie distale étroite 72 (à droite sur la figure 10b) qui est prévue pour s'étendre sur le côté de la tige 71, du côté du pivot 59 de celle-ci. Du côté du dégagement, la languette forme un épaulement 74. Cet épaulement occupe l'espace entre la tige 71 et le plan principal du levier intermédiaire 58.The Figures 10a and 10b illustrate the flag-shaped tongue 62 carried by the intermediate lever 58. figure 10a is the superposition of two side views corresponding to two snapshots of the tongue respectively in the rest position and in the active position of the push mechanism. The figure 10b is a front view of the tongue 62 from the side of the crown-push. One sees in particular on this figure that a clearance is arranged in the left part of the flag. This clearance is positioned in the axis of the winding and setting rod 71, so that it allows the passage of this rod. On the other hand, we see that the tongue has a narrow distal portion 72 (right on the figure 10b ) which is provided to extend on the side of the rod 71, the side of the pivot 59 thereof. On the release side, the tongue forms a shoulder 74. This shoulder occupies the space between the rod 71 and the main plane of the intermediate lever 58.

Comme la figure 10a, la figure 9 est la superposition de deux instantanés. Ces deux instantanés illustrent respectivement la position de repos et la position active du levier intermédiaire 58 et du tenon 57. On comprendra que la figure 9 est une vue du mouvement depuis le côté pont, le plan du dessin étant parallèle à celui du mouvement. Le drapeau formé par la languette 62 s'étend donc dans un plan perpendiculaire à celui du dessin. Les deux droites d' et d" sur le dessin sont respectivement les traces du plan du drapeau dans la position de repos et la position active du mécanisme à poussoir. On voit que d' fait un angle γ avec le plan de la surface d'appui 69, alors que d" fait un angle δ avec ce plan. Les angles γ et δ sont de signe opposé.As the figure 10a , the figure 9 is the superposition of two snapshots. These two snapshots respectively illustrate the rest position and the active position of the intermediate lever 58 and the post 57. It will be understood that the figure 9 is a view of the movement from the bridge side, the plane of the drawing being parallel to that of the movement. The flag formed by the tongue 62 therefore extends in a plane perpendicular to that of the drawing. The two lines d 'and d "in the drawing are respectively the traces of the plane of the flag in the rest position and the active position of the pusher mechanism.It is seen that in fact an angle γ with the plane of the surface of support 69, while de facto an angle δ with this plane. The angles γ and δ are of opposite sign.

On peut voir sur la figure 9 que, comme on l'a déjà dit, la languette 62 est approximativement dans l'axe de la couronne-poussoir 65. Lorsque le poussoir est en position de repos, le levier intermédiaire 58 est pivoté en direction de l'extérieur du mouvement. Dans cette position, le plan du drapeau n'est pas tout à fait parallèle à la surface d'appui 69 du poussoir comme en témoigne l'angle γ entre la trace d' et le plan de la surface d'appui. Dans ces conditions, lorsque le bouton poussoir va de la position de repos à la position active, la surface d'appui 69 commence par appuyer contre le bord de la languette proche de l'épaulement 74. A partir de cet instant, la pression de la surface d'appui sur la languette a pour effet de faire pivoter le levier intermédiaire 58 et donc de faire pivoter également le plan du drapeau. Il s'en suit que l'angle entre le plan du drapeau et le plan de la surface d'appui change bientôt de signe. Simultanément, la zone de contact entre la surface d'appui et la languette se déplace vers la partie distale étroite 72 de la languette. En se référant encore au figures, on comprendra que le bras de levier entre le second pivot 59 et la partie distale 72 est plus court que le bras de levier entre le pivot 59 et l'épaulement 74. Ainsi, lorsque le mécanisme à poussoir passe de la position de repos à la position active, le bras de levier entre le pivot 59 du levier intermédiaire et la zone de contact avec la surface d'appui 69 du poussoir se raccourcit. Ce dernier raccourcissement présente l'avantage de compenser le raccourcissement simultané du bras de levier entre le pivot 59 et le tenon 57. Ainsi, la variation du rapport de levier du levier intermédiaire 58 lors du passage de la position de repos à la position active est au moins partiellement compensée.We can see on the figure 9 that, as already mentioned, the tongue 62 is approximately in the axis of the thrust crown 65. When the pusher is in the rest position, the intermediate lever 58 is pivoted towards the outside of the movement. In this position, the plane of the flag is not quite parallel to the bearing surface 69 of the pusher as evidenced by the angle γ between the trace of and the plane of the bearing surface. Under these conditions, when the push button goes from the rest position to the active position, the bearing surface 69 begins by pressing against the edge of the tongue near the shoulder 74. From this moment, the pressure of the bearing surface on the tongue has the effect of pivoting the intermediate lever 58 and thus also to rotate the plane of the flag. It follows that the angle between the plane of the flag and the plane of the bearing surface soon changes sign. Simultaneously, the area of contact between the bearing surface and the tongue moves toward the narrow distal portion 72 of the tongue. Referring again to the figures, it will be understood that the lever arm between the second pivot 59 and the distal portion 72 is shorter than the lever arm between the pivot 59 and the shoulder 74. Thus, when the push mechanism passes from the rest position to the active position, the lever arm between the pivot 59 of the intermediate lever and the contact zone with the bearing surface 69 of the pusher is shortened. This last shortening has the advantage of offsetting the simultaneous shortening of the lever arm between the pivot 59 and the pin 57. Thus, the variation of the lever ratio of the intermediate lever 58 during the transition from the rest position to the active position is at least partially compensated.

De manière connue en soi, l'extrémité libre de la bascule de commande 56 porte le cliquet de bascule de commande (référencé 52). Le cliquet 52 est pivoté librement sur l'extrémité de la bascule et il est rappelé contre la denture rochet 42 de la roue à colonnes par le ressort de cliquet 54. Le cliquet 52 est donc agencé pour coopérer avec les dents du rochet 42, et lorsque sous l'effet d'une pression sur le poussoir, l'extrémité de la bascule de commande 56 est amenée à pivoter en direction du centre du mouvement, le cliquet 52 accompagne ce mouvement en poussant une dent du rochet vers le centre du mouvement. Ainsi, de manière habituelle, chaque pression sur le poussoir fait avancer la roue à colonnes de la valeur d'une dent du rochet. Puis, sitôt que la pression sur le poussoir est relâchée, le ressort de commande 60 fait reprendre leur position de repos à la bascule 56 et au levier 58. Le cliquet 52 revient également en arrière en se désengageant du rochet par glissement sur l'incliné d'une dent. Le cliquet se trouve ainsi prêt à actionner la dent suivante, lors de la prochaine pression sur le poussoir. On comprendra de ce qui précède que, dans le présent exemple, la bascule de commande 56 constitue à levier du 2ème genre (autrement dit « inter-résistant »), et que le cliquet 52 actionne la roue à colonnes en repoussant les dents du rochet 42. Cet agencement diffère de celui des mécanismes à poussoir classiques, dans lesquelles, la bascule de commande se comporte comme un levier du 1er genre (autrement dit « inter-appui »), et dans lesquelles le cliquet à la forme d'un crochet qui actionne la roue à colonnes en tirant une dent du rochet en direction de l'extérieur du mouvement (comme illustré dans les figures 1 et 2 représentant un mécanisme de chronographe de l'art antérieur). Un avantage d'utiliser un levier du 2ème genre, qui porte un cliquet agencé pour pousser les dents du rochet, est qu'il permet de réduire la place occupée par le mécanisme de chronographe.In a manner known per se, the free end of the control rocker 56 carries the control rocker pawl (referenced 52). The pawl 52 is pivoted freely on the end of the rocker and is pressed against the ratchet toothing 42 of the column wheel by the pawl spring 54. The pawl 52 is thus arranged to cooperate with the teeth of the ratchet 42, and when under the effect of a pressure on the pusher, the end of the control rocker 56 is caused to pivot towards the center of the movement, the pawl 52 accompanies this movement by pushing a tooth of the ratchet towards the center of the movement . Thus, in the usual way, each pressure on the pusher advances the column wheel by the value of a tooth of the ratchet. Then, as soon as the pressure on the pusher is released, the control spring 60 resumes their rest position at the rocker 56 and the lever 58. The pawl 52 also returns backwards by disengaging the ratchet by sliding on the inclined of a tooth. The ratchet is thus ready to actuate the next tooth, when the next push on the pusher. It will be appreciated from the foregoing that in the present example, the control lever 56 is lever of the 2nd kind (i.e. "cross-resistance"), and the 52 pawl actuates the column wheel, pushing the teeth of ratchet 42. This arrangement differs from that of conventional pusher mechanisms, wherein, the control lever acts as a lever 1 kind (i.e. "cross-bearing"), and wherein the pawl in the form of a hook that actuates the column wheel by pulling a ratchet tooth towards the outside of the movement (as shown in Figures 1 and 2 representing a chronograph mechanism of the prior art). An advantage of using a lever of the 2nd kind, which carries a pawl arranged to push the ratchet teeth, it is possible to reduce the space occupied by the chronograph mechanism.

De manière classique, dans le présent exemple, Il faut exercer trois pressions sur le poussoir, pour qu'une colonne prenne la place de la précédente, ce qui correspond aux trois fonctions du chronographe : le départ, l'arrêt, et la remise à zéro. La figure 3 montre le mécanisme de chronographe à l'arrêt, après avoir été remis à zéro. Tous les éléments du mécanisme de chronographe sont arrêtés à l'exception du pignon oscillant 2 qui est entraîné en permanence par le rouage du mouvement de la montre (le sens de rotation du pignon oscillant est indiqué par la flèche).Conventionally, in the present example, it is necessary to exert three pressure on the pusher, so that a column takes the place of the previous one, which corresponds to the three functions of the chronograph: the start, the stop, and the delivery to zero. The figure 3 shows the chronograph mechanism stopped, after being reset. All the elements of the chronograph mechanism are stopped except for the oscillating pinion 2 which is permanently driven by the watch movement (the direction of rotation of the oscillating pinion is indicated by the arrow).

La figure 4 illustre l'instant de la mise en marche du mécanisme de chronographe. Le bouton 67 de la couronne-poussoir est enfoncé et le levier intermédiaire 58 ainsi que la bascule de commande 56 ont pivotés en direction du centre du mouvement en entraînant le cliquet 52. Ce déplacement du cliquet fait avancer la roue à colonnes 40 de 30° dans le sens horaire. La rotation de 30° de la roue à colonnes a pour effet, d'une part, de faire se soulever le bec de la bascule de remise à zéro 10, la faisant pivoter de manière à soulever le marteau et à libérer les coeurs 7, 17. D'autre part, la rotation de la roue à colonnes a également pour effet de faire plonger le bec de la bascule d'embrayage 4 dans l'espace entre deux colonnes (référencé 44 sur les figures 9 et 10). Comme on l'a vu plus haut, en permettant ainsi à la bascule d'embrayage de pivoter sous l'action du ressort 5, l'incrémentation de la roue à colonnes conduit également la denture du pignon oscillant à embrayer avec celle de la roue de chronographe 1. Finalement, la rotation de 30°, n'a pas d'effet sur le frein dont le bec reste levé.The figure 4 illustrates the moment when the chronograph mechanism is turned on. The button 67 of the push-button is depressed and the intermediate lever 58 and the control lever 56 have pivoted towards the center of the movement by driving the pawl 52. This movement of the pawl advances the column wheel 40 by 30 ° clockwise. The rotation of 30 ° of the column wheel has the effect, on the one hand, to raise the spout of the reset lever 10, pivoting it so as to lift the hammer and to release the cores 7, 17. On the other hand, the rotation of the column wheel also has the effect of plunging the nose of the clutch rocker 4 into the space between two columns (referenced 44 on the Figures 9 and 10 ). As seen above, thus allowing the clutch rocker to pivot under the action of the spring 5, the incrementation of the column wheel also drives the toothing of the rocker gear to engage with that of the wheel 1. Finally, the rotation of 30 ° has no effect on the brake whose beak remains lifted.

La figure 5 montre le mécanisme de chronographe en marche. Le bouton 67 de la couronne-poussoir 65 est revenu à sa position de repos, comme le sont également le levier intermédiaire 58 et la bascule de commande 56. Le cliquet 52 est également revenu en arrière, et se trouve prêt pour actionner la dent suivante lorsque le poussoir sera actionné à nouveau. La roue de chronographe 1, la roue intermédiaire 12 et le roue de compteur de minutes 15 sont entraînées en rotation par le pignon oscillant 2 dans le sens indiqué par les flèches sur la figure.The figure 5 shows the chronograph mechanism in operation. The button 67 of the pusher ring 65 has returned to its rest position, as are also the intermediate lever 58 and the control lever 56. The pawl 52 has also turned back, and is ready to actuate the next tooth when the pusher will be operated again. The chronograph wheel 1, the intermediate wheel 12 and the wheel of minute counter 15 are rotated by the oscillating pinion 2 in the direction indicated by the arrows in the figure.

La figure 6 illustre l'instant de l'arrêt du mécanisme de chronographe. Suite à un nouvel actionnement de la couronne-poussoir, le bouton-poussoir 67 est enfoncé et le levier intermédiaire 58 ainsi que la bascule de commande 56 ont à nouveau pivotés en direction du centre du mouvement en entraînant le cliquet 52 et en faisant tourner une nouvelle fois la roue à colonnes de 30°. Cette nouvelle incrémentation de la roue à colonnes a pour effet, d'une part, de faire se soulever le bec de la bascule d'embrayage 4, conduisant le pignon oscillant 2 à se désengager de la roue de chronographe 1. D'autre part, la rotation de la roue à colonnes a également pour effet de faire plonger le bec de la bascule de frein 30 dans l'espace entre deux colonnes 44 en faisant pivoter la bascule. Comme on l'a vu plus haut, le pivotement de la bascule 30 fait s'abaisser le patin 32 contre la roue chronographe 1, de sorte que le patin bloque la roue de chronographe.The figure 6 illustrates the moment of stop of the chronograph mechanism. After a further actuation of the push-button crown, the push-button 67 is depressed and the intermediate lever 58 and the control lever 56 have again pivoted towards the center of the movement by driving the pawl 52 and rotating a again the column wheel of 30 °. This new incrementation of the column wheel has the effect, on the one hand, to raise the spout of the clutch lever 4, causing the oscillating pinion 2 to disengage from the chronograph wheel 1. On the other hand , the rotation of the column wheel also has the effect of plunging the nose of the brake lever 30 in the space between two columns 44 by pivoting the rocker. As seen above, the pivoting of the rocker 30 lowers the pad 32 against the chronograph wheel 1, so that the pad blocks the chronograph wheel.

La figure 7 montre le mécanisme de chronographe arrêté. Le bouton de la couronne-poussoir 65 est revenu à sa position de repos, comme le sont également le levier intermédiaire 58 et la bascule de commande 56. Le cliquet 52 est également revenu en arrière, et se trouve prêt pour actionner la dent suivante lorsque le poussoir sera actionné à nouveau. Le patin 32 de la bascule de frein 30 retient la roue de chronographe 1, et la roue de compteur de minutes 15, dans la position dans laquelle le mécanisme de chronographe a été arrêté, permettant la lecture du temps écoulé entre la mise en marche et l'arrêt du mécanisme de chronographe.The figure 7 shows the stopped chronograph mechanism. The push-button button 65 has returned to its rest position, as are also the intermediate lever 58 and the control lever 56. The pawl 52 has also turned back, and is ready to actuate the next tooth when the pusher will be operated again. The shoe 32 of the brake rocker 30 holds the chronograph wheel 1, and the minute counter wheel 15, in the position in which the chronograph mechanism has been stopped, allowing the reading of the time elapsed between the start-up and the stop of the chronograph mechanism.

La figure 8 illustre l'instant de la remise à zéro du mécanisme de chronographe. Suite à un nouvel actionnement de la couronne-poussoir, le bouton 67 est enfoncé et le levier intermédiaire 58 ainsi que la bascule de commande 56 ont à nouveau pivotés en direction du centre du mouvement en entraînant le cliquet 52 et en incrémentant une nouvelle fois la roue à colonnes de 30°. Ce nouveau déplacement de la roue à colonnes a pour effet, d'une part, de faire se soulever le bec de la bascule de frein 30, conduisant le patin 32 à s'écarter de la roue de chronographe 1. D'autre part, la rotation de la roue à colonnes a également pour effet de faire plonger le bec de la bascule de remise à zéro 10 dans l'espace entre deux colonnes 44, faisant ainsi pivoter la bascule. Ce pivotement de la bascule a pour effet d'abaisser les deux inclinés 8a et 8b du marteau respectivement contre les deux coeurs 7, 17, de sorte à ramener la roue de chronographe 1 et la roue de compteur de minutes 15 à leurs positions de départ respectives.The figure 8 illustrates the moment of resetting the chronograph mechanism. After a further actuation of the push-button crown, the button 67 is depressed and the intermediate lever 58 as well as the control lever 56 have again pivoted towards the center of the movement by driving the pawl 52 and by incrementing again the column wheel of 30 °. This new displacement of the column wheel has for indeed, on the one hand, to raise the nose of the brake lever 30, causing the shoe 32 to move away from the chronograph wheel 1. On the other hand, the rotation of the column wheel also has to effect of plunging the tip of the reset rocker 10 in the space between two columns 44, thus pivoting the rocker. This pivoting of the rocker has the effect of lowering the two inclined 8a and 8b of the hammer respectively against the two cores 7, 17, so as to bring the chronograph wheel 1 and the minute counter wheel 15 to their starting positions. respectively.

En se référant encore au figures 3 à 8, on notera que, si on compare le bec de la bascule d'embrayage 4 et celui de la bascule de remise à zéro 10 aux becs qui sont représentés dans la figure 2, On constate immédiatement que les becs des bascules du mouvement de chronographe conforme à la présente invention peuvent être beaucoup plus effilés que ceux de l'art antérieur. Un avantage de cette caractéristique est qu'un bec effilé (dont la pointe fait un angle inférieur à 40° ; de préférence un angle inférieur à 30°), permet aux bascules du mécanisme de chronographe du présent exemple de s'abaisser même dans l'espace relativement étroit constitué par l'interstice entre deux colonnes de la roue à colonnes illustrée à la figure 10 par exemple. Corolairement, on comprendra également que l'utilisation de becs effilés comme ceux des bascules du mécanisme de chronographe du présent exemple, nécessite en retour d'avoir des colonnes plus larges pour éviter que les becs ne s'abaissent à mauvais escient.Referring again to Figures 3 to 8 , it will be noted that, if one compares the nose of the clutch rocker 4 and that of the reset rocker 10 to the nozzles which are represented in the figure 2 It is immediately apparent that the latches of the latches of the chronograph movement according to the present invention can be much more sharp than those of the prior art. An advantage of this feature is that a tapered nose (whose tip is at an angle of less than 40 °, preferably an angle of less than 30 °), allows the latches of the chronograph mechanism of the present example to lower even in the relatively narrow space constituted by the gap between two columns of the column wheel illustrated in FIG. figure 10 for example. Corollary, it will also be understood that the use of tapered beaks such as flip-flops of the chronograph mechanism of the present example, in turn requires to have wider columns to prevent the beaks from falling down badly.

Claims (8)

  1. Timepiece movement including a chronograph mechanism comprising a column wheel (40) and a pusher device arranged for manually actuating the column wheel, the pusher device comprising a push button (67, 69) axially moveable parallel to the plane of the movement between a rest position and an active position, comprising a pivoting control lever (56) mounted on a first pivot (55) and carrying a click (52), the click being returned against a toothing (42) of the column wheel, and comprising an intermediate lever (58) mounted on a second pivot (59) and extending substantially along the periphery of the movement, the intermediate lever being arranged to be actuated by the push button, and comprising a distal portion arranged to actuate the pivoting control lever (56), the first pivot (55) and the second pivot (59) being arranged at the periphery of the movement, characterized
    - in that the first pivot (55) and the second pivot (59) are arranged one on either side of the push button (67, 69), the pivoting control lever and the intermediate lever extending from the respective pivot thereof toward each other, and a distal portion of the pivoting control lever being arranged to cooperate with the distal portion of the intermediate lever; and
    - in that the click (52) is arranged to forward one tooth of the toothing (42) of the column wheel (40) when the push button is moved from the rest position into the active position and to be released from the toothing (42) by sliding over the top of one tooth when the push button returns to the rest position from the active position.
  2. Timepiece movement according to claim 1, characterized in that a free end of the pivoting control lever (56), first, has a projecting portion (57), the distal portion of the intermediate lever (58) being arranged to abut against the projecting portion, and in that when the push button changes from the rest position to the active position, the projecting portion slides against the distal portion of the intermediate lever towards the pivot, so that the distance between the second pivot (59) and a point of contact between the intermediate lever (58) and the projecting portion (57) is decreased.
  3. Timepiece movement according to claim 1 or 2, characterized in that it is round in shape.
  4. Timepiece movement according to any of claims 1, 2 or 3, characterized in that the push button includes a bearing surface (69) perpendicular to the axis of the pusher, and in that the intermediate lever (58) carries a flag (62) arranged between the second pivot (59) and the distal portion, in the axis of the push button, the flag extending in a substantially perpendicular plane to the plane of the movement, and the bearing surface of the push button being arranged to abut against an area of the flag, so that the bearing surface pushes back the intermediate lever towards the centre of the movement actuating the pivoting control lever (56) when the push button is moved from the rest position to the active position.
  5. Timepiece movement according to claim 4, characterized in that the angle formed by the plane of the bearing surface (69) with the outline of the plane of the flag (62) in the plane of the movement, changes sign when the push button changes from the rest position to the active position.
  6. Timepiece movement according to claim 5, characterized in that, when the push button changes from the rest position to the active position and said angle changes sign, the area of the flag (62) against which the bearing surface abuts moves towards the pivot (59) of the intermediate lever (58) so as to increase the lever ratio of the intermediate lever.
  7. Timepiece movement according to claim 5, characterized in that it includes a winding and time setting stem (71) which extends from a crown (65) towards the centre of the movement coaxially with the push button, and in that the flag (62) has a recess in the axis of the push button to allow the stem to pass, a narrow distal portion (72) of the flag extending between the stem and the pivot (59), whereas the part of the flag located between the stem and the intermediate lever forms a shoulder (74).
  8. Timepiece movement according to claim 7, characterized in that, when the push button changes from the rest position to the active position and said angle changes sign, the area of the flag against which the bearing surface abuts, moves from the shoulder (74) to the narrow distal portion (72) so as to increase the lever ratio of the intermediate lever.
EP11192669.7A 2011-12-08 2011-12-08 Timepiece movement comprising a chronograph mechanism with column wheel Active EP2602675B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP11192669.7A EP2602675B1 (en) 2011-12-08 2011-12-08 Timepiece movement comprising a chronograph mechanism with column wheel
US13/693,781 US8882338B2 (en) 2011-12-08 2012-12-04 Chronograph mechanism with a column wheel and timepiece movement including the same
JP2012267870A JP5508509B2 (en) 2011-12-08 2012-12-07 Chronograph mechanism with column wheel and watch movement including the same
RU2012152919/12A RU2603591C2 (en) 2011-12-08 2012-12-07 Chronograph mechanism with column wheel, as well as clock article comprising such chronograph mechanism
CN201210524669.1A CN103163775B (en) 2011-12-08 2012-12-07 There is the time movement of column wheel and include the watch and clock movement of this time movement
HK13113952.4A HK1186534A1 (en) 2011-12-08 2013-12-16 Chronograph mechanism with a column wheel and timepiece movement including the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11192669.7A EP2602675B1 (en) 2011-12-08 2011-12-08 Timepiece movement comprising a chronograph mechanism with column wheel

Publications (2)

Publication Number Publication Date
EP2602675A1 EP2602675A1 (en) 2013-06-12
EP2602675B1 true EP2602675B1 (en) 2014-08-27

Family

ID=45093627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11192669.7A Active EP2602675B1 (en) 2011-12-08 2011-12-08 Timepiece movement comprising a chronograph mechanism with column wheel

Country Status (6)

Country Link
US (1) US8882338B2 (en)
EP (1) EP2602675B1 (en)
JP (1) JP5508509B2 (en)
CN (1) CN103163775B (en)
HK (1) HK1186534A1 (en)
RU (1) RU2603591C2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH709796A1 (en) * 2014-06-19 2015-12-31 Société Anonyme De La Manufacture D Horlogerie Audemars Piguet & Cie An rocker clutch timepiece.
EP3264199A1 (en) 2016-07-01 2018-01-03 Montres Breguet S.A. Timepiece comprising a switching device of a clockwork mechanism
DE202017107668U1 (en) * 2017-12-18 2018-01-19 Uwe Heinz Zeroing device for minute hand of a chronograph and chronograph
EP3502801B1 (en) * 2017-12-19 2021-02-17 Omega SA Chronograph repetition mechanism with safety

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0871095B1 (en) * 1997-04-08 2002-08-14 Jaquet S.A. Display device with jumping seconds
EP1296205A1 (en) * 2001-09-24 2003-03-26 Girard-Perregaux S.A. Chronograph mechanism
EP1316863A1 (en) 2001-11-09 2003-06-04 Manufacture Roger Dubuis S.A. Shaped watch-movement with chronograph
US6975561B2 (en) * 2002-06-13 2005-12-13 Vaucher Manufacture Fleurier S.A. Chronograph mechanism
EP1372117B1 (en) * 2002-06-13 2008-04-16 Vaucher Manufacture Fleurier SA Mechanism for chronograph
EP1445669A1 (en) * 2003-02-10 2004-08-11 Richemont International S.A. Constant force escapement mechanism for a timepiece with indirect seconds
JP2004294278A (en) * 2003-03-27 2004-10-21 Seiko Instruments Inc Chronograph timepiece having chronograph train wheel disposed on chronograph unit
EP1746471B1 (en) * 2005-07-20 2019-09-18 Breitling AG Return-to-zero device for two time counters
EP1777598B1 (en) * 2005-10-21 2012-02-15 Rolex Sa Timepiece with a mechanism to measure adjustable predetermined times
US7597471B2 (en) * 2005-11-24 2009-10-06 Vaucher Manufacture Fleurier S.A. Time piece chronograph clockwork movement
EP1818734A1 (en) * 2006-02-08 2007-08-15 Montres Journe S.A. Push-button device for controlling a function from the outside of a watch case
EP2068211B1 (en) * 2007-12-07 2013-03-13 Omega SA Chronograph control device
EP2073078B1 (en) * 2007-12-21 2012-11-07 Omega SA Bistable hammer for a chronograph mechanism
EP2073077A1 (en) * 2007-12-21 2009-06-24 Omega SA Shockproof device for a timepiece control element
EP2228692A1 (en) * 2009-03-12 2010-09-15 ETA SA Manufacture Horlogère Suisse Column wheel for a chronograph, chronograph and chronograph timepiece comprising such a wheel

Also Published As

Publication number Publication date
RU2012152919A (en) 2014-06-20
JP2013120190A (en) 2013-06-17
HK1186534A1 (en) 2014-03-14
CN103163775A (en) 2013-06-19
CN103163775B (en) 2016-06-08
US8882338B2 (en) 2014-11-11
US20130148476A1 (en) 2013-06-13
EP2602675A1 (en) 2013-06-12
RU2603591C2 (en) 2016-11-27
JP5508509B2 (en) 2014-06-04

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