EP0851320A1 - Pièce d'horlogerie dont le mécanisme est entraíné par des moyens mécaniques et comprenant un dispositif de réserve de marche - Google Patents
Pièce d'horlogerie dont le mécanisme est entraíné par des moyens mécaniques et comprenant un dispositif de réserve de marche Download PDFInfo
- Publication number
- EP0851320A1 EP0851320A1 EP96120575A EP96120575A EP0851320A1 EP 0851320 A1 EP0851320 A1 EP 0851320A1 EP 96120575 A EP96120575 A EP 96120575A EP 96120575 A EP96120575 A EP 96120575A EP 0851320 A1 EP0851320 A1 EP 0851320A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- barrel
- spring
- timepiece according
- mobile
- moment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B9/00—Supervision of the state of winding, e.g. indicating the amount of winding
Definitions
- the present invention relates to a timepiece having a mechanism driven by mechanical means and a power reserve indication device for this mechanism.
- a classic power reserve is formed by a set of wheels used to reduce the rotating barrel path so that an indicator driven by this assembly undergoes a lower rotation 360 ° between the maximum cocking position and the position minimum winding spring.
- Such a gear therefore normally requires several wheels which increase the obstruction of the movement and complicates the construction of it. Therefore, the arrangement of a reserve of classic step in a mechanical watch movement is relatively expensive and the congestion resulting from such device leads to construction difficulties does that cannot always be resolved, especially in the framework of movements of reduced dimensions, for example for ladies' wristwatches.
- the object of the present invention is to overcome the disadvantages of the prior art by proposing a part timepiece equipped with a power reserve device which can be bulky and easily integrated into any mechanical watch movement.
- the invention has for the purpose of providing a power reserve device inexpensive and easy to build.
- the present invention relates to a timepiece including a barrel, used for mechanical energy storage for training a mechanism, and a device for indicating the reserve of step of this mechanism, characterized in that the power reserve indication device is formed by an elastic element, mechanically coupling in rotation first and second mobiles driven by the barrel in rotation around a common geometric axis, and by first and second display means integral with rotation of said first and second respectively movable and arranged to indicate an offset angular between two directions defined respectively by these first and second display means at least within a range of determined values of this offset angular.
- a indication of the level of arming of the barrel i.e. barrel spring tension level, or the moment of force exerted by the barrel on the gear train of the mechanism is directly displayed so that a user can know the power reserve of the piece of watchmaking.
- the reserve indication of walking requires a very limited number of items additional and in particular no additional wheel.
- each level of barrel spring winding corresponds to a moment of unequivocal force exerted by the barrel on the gear train driven by this barrel.
- the indication of the moment of force exerted by the barrel on the driven mechanism, in particular on the gear train gives an indication perfectly defined and unequivocal of the level of armament of the barrel spring.
- the power reserve device includes a first mobile 2 and a second mobile 4 coupled mechanically rotated by a helical spring 6 which provides elastic coupling between mobiles 2 and 4.
- the two mobiles 2 and 4 are arranged coaxially to be rotated by the barrel 8 around a common geometric axis 10.
- the mobile 2 is formed by an axis central 12 and a pinion 14 whose toothing 16 is in direct engagement with the toothing 18 of the barrel 8.
- the mobile 4 is formed by a cylindrical part 20 and a wheel toothed 22. The wheel 22 meshes with the pinion 24 of a mobile 26.
- the cylindrical part 20 of the mobile 4 is mounted on axis 12 of mobile 2 so that it can rotate around of the geometric axis 10 independently of the rotation of the mobile 2.
- the mobile 2 is elastically coupled in rotation to mobile 4 by means of spring 6.
- the first end 28 of spring 6 is fixed to mobile 2 while the second end 30 of this spring 6 is fixed to the mobile 4.
- the fixing of the spring 6 to the mobile 2 and 4 can be made in various ways within the reach of man trade and in particular, as shown, by the introduction ends 28 and 30 in provided holes in mobiles 2 and 4 respectively.
- the spring 6 being housed between wheel 22 and pinion 14, it is not necessary that the ends 28 and 30 are introduced by force in the corresponding holes since the spring 6 is positioned axially by the pinion 14 and the base 32 supporting the wheel 22.
- Axis 12 has a pivot at one end 34 mounted in a bearing 36 in a conventional manner.
- the axis 12 and the cylindrical part 20 which surrounds it through plate 38 to allow the arrangement of a disc or plate 40 integral with the mobile 4 and a needle 42 secured to the mobile 2, the needle 42 being located above the disc 40 which is arranged in an opening of the dial 44.
- the hands 45 used to the time display are arranged to rotate above needle 42.
- the disc 40 and the needle 42 shown from above at FIG. 4 serve as means of displaying the reserve of market. At least 40 mark is shown on the disc 40 46 used to define an angular offset ⁇ between the direction defined by this reference 46 and the geometric axis of rotation 10 and the direction of the longitudinal axis 48 of needle 42.
- the angular offset ⁇ gives a indication of the power reserve of the driven mechanism by barrel 8, as will be described in more detail below using Figures 2 and 3.
- the angular offset is limited lower by the stop 50 and higher by the stop 52.
- the limitation of the angular offset ⁇ corresponds to a limitation of the moment of force exerted by the barrel 8 on the spring 6.
- Curve 56 which represents the moment of force M as a function of the angular offset ⁇ defined by the angle at the center of the two ends 28 and 30 of the spring 6, is increasing monotonous.
- the angle ⁇ has the value 2a which corresponds to a minimum moment of force M1 exerted by the barrel on the spring 6.
- the pin 54 comes to bear against the stop 52, this value M3 thus defining a value maximum for the moment of force exerted on the spring.
- the angle ⁇ can therefore vary between the value 2a and the value 2c.
- the pin 54 being integral in rotation with the mobile 2 and the end 30 of the spring 6 being integral in rotation of the mobile 4, the angular offset ⁇ between the reference 46 and the axis 48 of the needle 42 is equal to the angle ⁇ decreased or increased by a predetermined constant value.
- the angular offset ⁇ is limited below by the pin 54 and the surface 50 of the cylinder 20. Similarly, the angular offset ⁇ is limited superiorly by means of the pin 54 and of the surface 52 of the cylinder 20.
- the offset ⁇ gives an indication of the power reserve of the timepiece mechanism according to the invention since it gives an indication the moment of force exerted by the barrel on the mobile 2, this moment of force having a value dependent on the level reinforcement, i.e. the tension of the spring of the barrel serving as a mechanical energy accumulator.
- the present invention does not increase the height of the timepiece relative to power reserves conventional.
- the means of lower and upper limitation of angular offset ⁇ are advantageous and form a preferred variant of realization, but are not necessary for the indication of the power reserve according to the invention.
- these means for limiting the angular offset ⁇ form a improvement of the invention making it possible to spare the spring 6 by limiting the moment of force exerted on it and also to ensure a certain linearity between the level tension of the barrel spring and the angular offset ⁇ within the predetermined accessible range of values.
- the spring 6 is a spring developing in a spiral.
- a spring presents the advantage of being flat and therefore of height reduced, which can be an advantage for movements low mechanical height.
- the cross section of the spring can be either circular, or rectangular when the spring is formed by a metallic ribbon wound on itself at the way of a barrel spring.
- the reserve device walking can be arranged on mobiles intervening downstream in the gear train driven by the barrel 8 relative thereto. So the pinion 14 is not necessarily in direct contact with the teeth 18 of the barrel 8.
- the reserve device step according to the invention can be arranged at the mobile 26, which should be transformed according to the invention into two coaxial mobiles similar to mobiles 2 and 4 of the first embodiment described using the Figures 1 to 4.
- the lateral opening made in the cylinder 20 is preferably less than 180 °, which limits the variation of the angular offset ⁇ to one value less than 180 °.
- the angle at the center defined by the surface 50 and the direction given by the end 30 of the spring 6 and the geometric axis 10, in a plane perpendicular to this geometric axis 10, is advantageously between -70 ° and + 70 °, the surface 50 defining the minimum winding position of spring 6. From this fact, the holding in place of the mobile 4 is guaranteed.
- the angle at the center defined by the surfaces 50 and 52 is between 120 ° and 150 °.
- the lateral opening can be greater than 180 ° provided that the end 30 of the spring 6 is judiciously fixed to the mobile 4 so to ensure that the reaction force exerted by the axis 12 on cylinder 20 is oriented towards the solid part of the cylinder open laterally.
- FIGS. 5 to 9 there will be described below a second embodiment of a timepiece according to the invention.
- the elements already described in the first embodiment will not be again described here in detail.
- the power reserve device again includes mobiles 60 and 62 arranged to undergo a rotation around a geometric axis 10 common to the two mobiles 60 and 62.
- the mobile 60 engages with the barrel 8 and is rotatably coupled to the mobile 62 using a spring helical 6.
- the mobile 60 differs from the mobile 2 in that the part projecting from the pinion 14 towards of the mobile 62 is formed by a projection 64 in the form of annular section defining at its two ends two flat surfaces 66 and 68.
- the mobile 62 differs from the mobile 4 in that it is formed by a cylinder 70 not having side opening and not crossing the plate 38 as in the first embodiment.
- the mobile 62 has a section-shaped projection 72 annular which extends in the direction of the mobile 60 so equivalent to the projection 64.
- the projection 72 defines also at its two ends two flat surfaces 74 and 76.
- the internal radius R defined by the projections 64 and 72 is greater than the radius defined by spring 6 relative to the geometric axis 10.
- the spring 6 is arranged around the part cylindrical 70 of the mobile 62.
- the mobile 60 and 62 are mounted coaxially so that the surface 74 can come to bear against the surface 66 and that the surface 76 can come to bear against surface 68 of so as to limit lower and higher the angular offset ⁇ in the display of the power reserve as shown in Figure 9.
- the arrangement of projections 64 and 72 is such that the moment of force exerted on the spring 6 varies substantially between a value M1 and a value M3 as shown in the Figure 3 in the context of the description of the first mode of achievement.
- the ends 28 and 30 of the spring 6 are bent radially and not axially as in the first mode of achievement.
- the end 28 is arranged to so as to be in abutment against the surface 68 of the projection 64 and the end 30 is arranged so as to be in bearing against the surface 76 of the projection 72.
- the end 30 is located axially at a higher level relative to the upper surface 78 of the projection 64.
- the tray or disk 40 means display is arranged on a wheel 80 integral with rotation of the wheel 22 of the mobile 62, the wheel 80 being rotatably coupled to wheel 22 via a pinion 82 having a first lower toothing 84 which meshes with the wheel 22 and a second toothing upper 86 which meshes with the wheel 80.
- the pinion 82 to double toothing serves as a rotation multiplier of such so that the angular offset ⁇ between the axis longitudinal 48 of needle 42 and mark 46 provided at the surface of the disc 40 can vary between two values limits, namely a minimum value and a value maximum, the difference of which is greater than the distance relative possible for the mobile 62 relative to the mobile 60.
- the maximum center angle between the surface 68 of projection 64 and surface 76 of projection 72 is less than the angular difference between the maximum value and minimum value of the offset angular ⁇ displayed by the display means 40 and 42 shown in Figure 9.
- the pinion 82 is masked by means of the dial 44 and the disc 40. Note that the presence of the wheel 80 physically separated from disk 40 is not mandatory. In fact, in a variant, the plate 40 itself comprises at its circumference a toothing meshing with the upper teeth 86 of the pinion 82.
- the spring 6 is perfectly housed between the mobiles 60 and 62. In addition, its angular positioning is ensured by the fact that the ends 28 and 30 of this spring 6 are constantly pressing against the respective surfaces 68 and 76 against which they are arranged given that the spring 6 is constantly subjected to a moment of force not zero.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Measurement Of Unknown Time Intervals (AREA)
Abstract
Description
- la figure 1 est une vue en coupe d'un premier mode de réalisation d'un dispositif de réserve de marche selon l'invention;
- les figures 2a, 2b et 2c sont des vues de dessus partielles au niveau de la ligne de coupe II-II de la figure 1 qui représentent respectivement trois positions différentes correspondants à des niveaux d'armage différents du ressort de barillet équipant le mouvement horloger mécanique représenté à la figure 1;
- la figure 3 représente graphiquement le moment de force exercé par le barillet sur le pignon en prise directe avec celui-ci en fonction du niveau d'armage du ressort de barillet;
- la figure 4 est une vue partielle de dessus du premier mode de réalisation où les moyens d'affichage du dispositif de réserve de marche sont représentés;
- la figure 5 est une vue en coupe d'un deuxième mode de réalisation d'un dispositif de réserve de marche selon l'invention;
- la figure 6 est une vue éclatée de côté d'un ressort couplant mécaniquement en rotation deux mobiles selon le deuxième mode de réalisation de l'invention;
- les figures 7 et 8 sont respectivement deux vues en plan des deux mobiles représentés à la figure 6 selon les directions de projection VII et VIII de cette figure 6;
- la figure 9 est une vue de dessus du deuxième mode de réalisation selon la figure 5 où seuls les moyens d'affichage du dispositif d'indication de réserve de marche ont été représentés;
- la figure 10 est une variante de réalisation des moyens d'affichage.
Claims (10)
- Pièce d'horlogerie comprenant un barillet (8), servant au stockage d' énergie mécanique pour l'entraínement d'un mécanisme, et un dispositif d'indication de réserve de marche de ce mécanisme, caractérisée en ce que ledit dispositif d'indication de réserve de marche est formé par un élément élastique (6) couplant mécaniquement en rotation des premier et deuxième mobiles (2,4;60,62) entraínés par ledit barillet en rotation autour d'un axe géométrique commun (10), et par des premier et deuxième moyens d'affichage (40,42) solidaires en rotation respectivement desdits premier et deuxième mobiles et agencés de manière à indiquer un décalage angulaire (α) entre deux directions (46,48) définies respectivement par ces premier et deuxième moyens d'affichage au moins dans une plage de valeurs déterminée de ce décalage angulaire.
- Pièce d'horlogerie selon la revendication 1, caractérisée en ce que ledit élément élastique (6) est formé par un ressort hélicoïdal (6).
- Pièce d'horlogerie selon la revendication 1, caractérisée en ce que ledit élément élastique (6) est formé par un ressort en spirale.
- Pièce d'horlogerie selon l'une des revendications 1 à 3, caractérisée en ce que lesdits premier et deuxième mobiles (2,4;60,62) forment des première et deuxième roues d'un train d'engrenage dudit mécanisme.
- Pièce d'horlogerie selon la revendication 4, caractérisée en ce que ladite première roue (2;60) forme un pignon en prise directe avec ledit barillet.
- Pièce d'horlogerie selon l'une quelconque des revendications précédentes, caractérisée en ce que l'un desdits premier et deuxième moyens d'affichage (40,42) est formé par un disque (40) présentant à sa surface au moins un repère (46) et l'autre de ces premier et deuxième moyens d'affichage est formé par une aiguille (42) définissant un axe (48) indicateur dudit décalage angulaire (α) relativement audit repère.
- Pièce d'horlogerie selon l'une des revendications précédentes, caractérisée en ce que ledit dispositif d'indication de réserve de marche comprend des premiers moyens (54,20,52;64,72,68,76) pour limiter ledit décalage angulaire (α) de manière à limiter supérieurement le moment de force exercé sur ledit élément élastique (6) par ledit barillet (8).
- Pièce d'horlogerie selon l'une des revendications précédentes, caractérisée en ce que ledit dispositif d'indication de réserve de marche comprend des deuxièmes moyens (54,20,50;64,72,66,74) pour limiter ledit décalage angulaire (α) de manière à limiter inférieurement le moment de force exercé sur ledit élément élastique (6) par ledit barillet (8).
- Pièce d'horlogerie selon la revendication 7, caractérisée en ce que lesdits premiers moyens pour limiter le décalage angulaire sont formés par une saillie (54;64) solidaire de l'un desdits premier et deuxième mobiles (2,4;60,62) et par une butée (52;76) solidaire de l'autre de ces premier et deuxième mobiles et agencée pour que ladite saillie vienne en appui contre cette butée lorsque ledit moment de force a atteint une valeur maximale donnée.
- Pièce d'horlogerie selon la revendication 8, caractérisée en ce que lesdits deuxièmes moyens sont formés par une saillie (54;64) solidaire de l'un desdits premier et deuxième mobiles (2,4;60,62) et par une butée (50;74) solidaire de l'autre de ces premier et deuxième mobiles et agencée pour que ladite saillie vienne en appui contre cette butée lorsque ledit moment de force a atteint une valeur minimale donnée.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19960120575 EP0851320B1 (fr) | 1996-12-20 | 1996-12-20 | Pièce d'horlogerie dont le mécanisme est entraíné par des moyens mécaniques et comprenant un dispositif de réserve de marche |
DE1996609621 DE69609621T2 (de) | 1996-12-20 | 1996-12-20 | Mechanische Uhr mit Gangreserveanzeige |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19960120575 EP0851320B1 (fr) | 1996-12-20 | 1996-12-20 | Pièce d'horlogerie dont le mécanisme est entraíné par des moyens mécaniques et comprenant un dispositif de réserve de marche |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0851320A1 true EP0851320A1 (fr) | 1998-07-01 |
EP0851320B1 EP0851320B1 (fr) | 2000-08-02 |
Family
ID=8223524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960120575 Expired - Lifetime EP0851320B1 (fr) | 1996-12-20 | 1996-12-20 | Pièce d'horlogerie dont le mécanisme est entraíné par des moyens mécaniques et comprenant un dispositif de réserve de marche |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0851320B1 (fr) |
DE (1) | DE69609621T2 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1612625A1 (fr) * | 2004-07-01 | 2006-01-04 | Watch-U-License AG | Mécanisme indicateur de la réserve de marche d'une montre mécanique |
EP2360535A1 (fr) * | 2010-02-24 | 2011-08-24 | Blancpain S.A. | Dispositif indicateur de réserve de marche intégré dans la masse oscillante d'un mouvement à remontage automatique |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR8513E (fr) * | 1907-11-06 | 1908-04-28 | Pol Ravigneaux | Dispositif indicateur pour le remontage des mouvements d'horlogerie |
FR405768A (fr) * | 1909-08-05 | 1910-01-13 | Pol Ravigneaux | Dispositif indicateur du remontage dans des mouvements d'horlogerie |
CH281801A (fr) * | 1949-08-26 | 1952-03-31 | Vuilleumier Marcel | Pièce d'horlogerie. |
-
1996
- 1996-12-20 DE DE1996609621 patent/DE69609621T2/de not_active Expired - Lifetime
- 1996-12-20 EP EP19960120575 patent/EP0851320B1/fr not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR8513E (fr) * | 1907-11-06 | 1908-04-28 | Pol Ravigneaux | Dispositif indicateur pour le remontage des mouvements d'horlogerie |
FR405768A (fr) * | 1909-08-05 | 1910-01-13 | Pol Ravigneaux | Dispositif indicateur du remontage dans des mouvements d'horlogerie |
CH281801A (fr) * | 1949-08-26 | 1952-03-31 | Vuilleumier Marcel | Pièce d'horlogerie. |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1612625A1 (fr) * | 2004-07-01 | 2006-01-04 | Watch-U-License AG | Mécanisme indicateur de la réserve de marche d'une montre mécanique |
WO2006013120A1 (fr) * | 2004-07-01 | 2006-02-09 | Watch-U License Ag | Mecanisme indicateur de la reserve de marche d'une montre mecanique |
EP2360535A1 (fr) * | 2010-02-24 | 2011-08-24 | Blancpain S.A. | Dispositif indicateur de réserve de marche intégré dans la masse oscillante d'un mouvement à remontage automatique |
JP2011174927A (ja) * | 2010-02-24 | 2011-09-08 | Blancpain Sa | 回転錘に一体化されたパワーリザーブ表示装置と、それを備えた自動巻腕時計用の回転錘 |
US8342740B2 (en) | 2010-02-24 | 2013-01-01 | Blancpain S.A. | Oscillating weight for an automatic winding watch, including a power reserve indicator device integrated in said oscillating weight |
Also Published As
Publication number | Publication date |
---|---|
EP0851320B1 (fr) | 2000-08-02 |
DE69609621D1 (de) | 2000-09-07 |
DE69609621T2 (de) | 2001-04-12 |
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