EP2923241B1 - Minute hand of a timepiece, in particular of a chronograph - Google Patents
Minute hand of a timepiece, in particular of a chronograph Download PDFInfo
- Publication number
- EP2923241B1 EP2923241B1 EP13792317.3A EP13792317A EP2923241B1 EP 2923241 B1 EP2923241 B1 EP 2923241B1 EP 13792317 A EP13792317 A EP 13792317A EP 2923241 B1 EP2923241 B1 EP 2923241B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- release
- eccentric
- heart
- minute
- point
- 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.)
- Not-in-force
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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
- G04B13/00—Gearwork
- G04B13/002—Gearwork where rotation in one direction is changed into a stepping movement
- G04B13/003—Gearwork where rotation in one direction is changed into a stepping movement with a step for each complete revolution
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B19/00—Indicating the time by visual means
- G04B19/02—Back-gearing arrangements between gear train and hands
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B19/00—Indicating the time by visual means
- G04B19/04—Hands; Discs with a single mark or the like
-
- 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
Definitions
- the present invention relates to a minute counter of a timepiece, in particular a chronograph, having a central shaft which carries a second hand and which has a plurality of receiving regions, with a toothed wheel which is fixedly connected on the central shaft for driving about it in a first receiving region.
- a minute counter of a clock with the features of the preamble of claim 1 is known from EP 1 953 612 known.
- the present invention seeks to provide an adjustment for the minute counter of a clock, which allows this adjustment in a simple manner.
- the minute wheel is designed as a thin gear at the bottom, it is possible to arrange the trigger screw in a press fit below the zeroing heart, so that the Head of the eccentric is inserted in the executed in greater material thickness Nullstellherz and the finger of the eccentric in the also executed in greater material thickness trimming screw.
- these two elements inherently assume a smaller diameter in the construction, so that the adjustment according to the present invention is associated with a lower moment of inertia.
- the number 6 of the external shape corresponding release screw in the region between the smallest and largest radius is provided with a recess which allows springing back of the nose of the minute shift lever.
- FIG. 1 shows an exploded perspective view of an embodiment of a setting device for the minute counter of a clock according to the invention.
- the illustrated minute counter of the watch in particular a chronograph, comprises a central shaft 10 which can be driven rotatably by a clock mechanism (not shown), on which a second wheel 20 and a neutral star heart 30 are arranged in a rotationally fixed manner one above the other. Furthermore, a release screw 40 is provided in a press fit on the two elements mentioned.
- the clock advantageously has a not shown in the drawings Second hand on whose pointer tip follows a second scale, also not shown.
- the second hand is in a fixed angular position with the second wheel 20.
- the release screw 40 has at its radially circumferential surface 41 via a ramp-like rising switching curve, which passes from its point with the largest radius 42 radially to a point with the smallest radius 44. It overcomes a V-shaped cut 43, which will be described later.
- FIG. 1 shows Centrally on the longitudinal axis 100, the central shaft 10 is shown, which is driven via the fixedly connected with him gear 20.
- the gear 20 has at its outer edge via a plurality of teeth, in which engages a non-illustrated drive.
- the gear 20 rests on a stop flange 11 which projects beyond a first receiving region 12, on which the gear 20 is inserted with its attachment hole 22.
- the gear 20 is connected to the central shaft 10 with a rivet connection.
- the diameter of the first receiving area 12 is greater than a distance step 15, on which the zeroing heart 30 is placed.
- the zeroing heart 30 is fixedly fixed and rotates with the shaft 10. It is so oriented that a zeroing lever of the second hand acting on the setting surface 54 sets it to zero on its scale. This attachment of the zeroing heart 30 is realized without tolerance in the second receiving area 13.
- the third receiving region 14 again has a smaller diameter of the shaft 10 than the second receiving region 13, so that a step is formed, on which the triggering screw 40 is placed.
- the trigger screw 40 is in a press fit and is rotatably supported by a force against the shaft 10.
- an eccentric hole 32 is provided, which is arranged at a distance from the axis 100 of the central shaft 10, which in the Fig. 2 designated by the axis 110.
- the release screw 40 itself has a slot 45 which extends radially to its mounting hole 46, a larger diameter than the eccentric hole 32 in Nullstellherz 30 and in the radial direction is symmetrical with respect to the axis of rotation 110.
- an eccentric 50 is used, the cylindrical finger 52 is configured substantially matching the hole 32 and engages in this.
- the cylinder head 51 of the eccentric 50 which is also cylindrical, but has a different axis of symmetry, is inserted in the hole 45. This can be achieved by turning the head 51 of the eccentric 50 via the actuating slot 53 that the position of the eccentric head 51 in the slot 45 between in the FIG. 2 shown position (radially outermost position) and the opposite position changed.
- the eccentric 50 about the axis 110, the angular adjustment of the cam 40 relative to the zeroing heart 30 and thus relative to the gear 20 changes.
- the radial slot 45 allows this movement to a greater extent, since in a snug fit hole 32-finger 52 and hole (45) head 51, the settings would be very limited, as with each major rotation of the head 52 of the eccentric 51 is also connected to a radial change in the distance of the head 52 in the trigger screw 40, since the finger 52 is not capable of such an adjustment in the mating hole 32.
- the hole 32 is a radial slot for a radial movement of the finger 52 in a rotational movement of the eccentric with an angular adjustment between the trigger screw 40 and zeroing heart 30 and the hole 45 is just the head 52 receiving through round hole.
- the hole 32 in Nullstellherz 30 could also be a blind hole.
- the Fig. 3 now shows a plan view of the adjustment according to Fig. 1 in which further components of the minute counter are shown.
- the latch lever 60 is shown, which rotates about an axis 62 which is parallel to the axis 100 and 110, respectively.
- the pawl lever 60 has at a free end via a nose 61 which is pressed by the action of the leaf spring 63 against the switching cam 41 of the tripping screw.
- a Rotation of the gear 20 counterclockwise runs the nose 61 on the cam 41 in the growing distance from the axis 100 to the point of the maximum radius distance 42 to then on in the FIG. 3 shown time and position of the smallest radius distance 44 fall back.
- the minute switching pawl 71 mounted on another free end of the lever 60 with respect to the pivot axis 62 comes out of engagement with the saw teeth 72 of the minute counter 70.
- the minute counter 70 has thirty saw teeth 72 with corresponding tooth gaps 73.
- the thirty teeth are not all the same; the tooth gap 73 in which the pawl 71 engages in the drawing is much deeper than the others.
- the teeth 73 may all be configured the same.
- the eccentric wheel 50 is used in two running in thicker material components, namely the Nullstellherz 30 on which a not shown in the figures lever in the adjustment surface 54 can act when a zero position to be made ; and in the trigger screw 40, in which the slightly thicker nose 61 of the adjusting lever 60 engages.
- the gear 20 thin and thus effectively reduce the mass of the inertial system.
- the terms thin and thick are to be understood as follows.
- the material thickness of the gear 20 is less than the material thickness of the trigger screw 40 in the axial direction of the shaft 10.
- the material thickness of the gear 20 is less than the material thickness of the zeroing heart 30 in the axial direction of the shaft 10.
- the thickness of the adjusting lever 60 in this axial direction is then comparable, but not greater than the thickness of the trigger screw 40th
- the interference fit of the trigger screw 40 is sufficient for the two functions associated therewith.
- the tripping screw 40 sits sufficiently securely on the central shaft 10 and, on the other hand, by means of inserting a tool into the slot 53 and exerting a force for rotation of the eccentric head 51, the angular position of the spindle is possible Tripping screw 40 with respect to zeroing heart 30 and gear 20 to change.
- the slot 45 allows depending on the design in relation to the diameter of the eccentric head 51 to the diameter of the finger 52 an angular movement by a few degrees, for example between 1 and 10 degrees or 2 to 5 degrees.
- the eccentric 50 is arranged so removed from the axis 100 by the arrangement of the hole 32 in the heart 31; that it is preferably provided in the region of half of the switching cam 41 with the greater radial distance from the center, ie beyond (in the drawing of Fig. 1 to the left of) the imaginary radial line between the point of greatest radius 41 and the point of smallest radius 44 beyond the center of the shaft 10 to the opposite side of the screw 41 where this line passes over the tip 34 of the nulling heart 30.
- the slot 45 is then in an angular segment of 30 degrees to the line tip 34th Wave 10 to benefit from the remaining larger material portion of the zeroing heart 30 near the top 34.
- the central axis 110 of the opening 32 in the zeroing heart 30 is provided in an angular range of -30 and +30 degrees about the imaginary connection between the rotation axis 100 and the tip 34 of the zeroing heart 30.
- the opening 32 may be a slot and the opening 45 a hole exactly fitting, so that the axis of rotation of the eccentric, which then replaces the axis 110 with the axis of rotation of the head 51 and the finger 52 moves in a slot.
- the embodiment described here has the advantage that, as in the Fig. 3 It can be seen well, a portion of the eccentric head 51 in the slot 45 radially outside the switching curve 31 of the zeroing heart 30, so that the distance between the two axes of rotation 100 and 110 from each other, both set the translation as large as possible.
- the order of the elements tripping curve Nullstellherz-seconds.
- the sequence is zero-heart tripping curve seconds wheel, so where the two upper thicker elements are provided in reverse order, due to the functional adjustment of slot 45 and hole 32 is possible.
- the second wheel 20 is provided with at least one opening for the eccentric head, so that it (in view of the drawing of the Fig. 3 ) may be "up", that is, the order of the fourth wheel trip curve zeroing heart. Then the eccentric head 51 is arranged in such a breakthrough and acts from there into the in the Fig.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Unknown Time Intervals (AREA)
- Rehabilitation Tools (AREA)
- Transmission Devices (AREA)
Description
Die vorliegende Erfindung betrifft einen Minutenzähler einer Uhr, insbesondere eines Chronographen, mit einer zentrale Welle, die einen Sekundenzeiger trägt und die mehrere Aufnahmebereiche aufweist, mit einem Zahnrad, das auf der zentralen Welle für einen Antrieb um diese in einem ersten Aufnahmebereich fest verbunden ist, mit einem Nullstellherz, das auf der Zentrale Welle für einen Antrieb um diese in einem zweiten Aufnahmebereich fest befestigt ist, mit einer Auslöseschnecke, die auf der Zentrale Welle für einen Antrieb um diese in einem dritten Aufnahmebereich angeordnet ist und die eine radial umlaufende, rampenartig ansteigende Schaltkurve aufweist, an der unter federnder Vorspannung eine Nase eines um eine Schwenkachse schwenkbaren Minutenschalthebels während der Drehbewegung der Auslöseschnecke entlang gleitet und nach einem sechzig Sekunden entsprechenden Gleitweg den Punkt des grössten Radius überwindend auf den Punkt des geringsten Radius der Auslöseschnecke abfällt, mit einer an dem Minutenschalthebel angeordneten Minutenschaltklinke, durch die ein drehbar gelagertes Minutenzählrad bei Abfall der Nase des Minutenschalthebels auf den Punkt des geringsten Radius der Schaltkurve um einen Minutenschritt weiterschaltbar ist, wobei der Auslösepunkt des Weiterschaltens durch den Minutenschalthebel verstellbar einstellbar ist.The present invention relates to a minute counter of a timepiece, in particular a chronograph, having a central shaft which carries a second hand and which has a plurality of receiving regions, with a toothed wheel which is fixedly connected on the central shaft for driving about it in a first receiving region. with a nulling heart fixedly mounted on the central shaft for driving about it in a second receiving area, with a tripping screw disposed on the central shaft for driving about it in a third receiving area and having a radially encircling ramp-like rising Switching curve on which under the spring bias slides a nose of a pivotable about a pivot axis minute shift lever during the rotation of the trigger screw and after a sixty seconds corresponding Gleitweg the point of the largest radius overcoming the point of the smallest radius of the trigger screw abf falls, with an electrode disposed on the minute shift lever minutes pawl to the point of least radius of the switching curve is indexable by a rotatably mounted minute counting in waste of the nose of the minute shift lever about a minute step, wherein the trip point of the indexing is adjustable adjusted by the minutes lever.
Ein Minutenzähler einer Uhr mit den Merkmalen des Oberbegriffs des Anspruchs 1 ist aus der
Bei Uhren soll im Moment des Null-Durchgangs des Sekundenzeigers sowohl die Nase des Minutenschalthebels auf den Punkt des geringsten Radius der Auslöseschnecke abfallen, als auch über den Schalthebel und die Schaltklinke das Minutenzählrad um einen Schritt weiter schalten. Aufgrund von Toleranzen bei der Herstellung und Montage ist die Gleichzeitigkeit dieser beiden Funktionen nicht einfach zu erreichen. Bei der
Bei der Lösung nach dieser Schrift des Standes der Technik ist es nachteilig, dass für den Einsatz des Exzenters das Zahnrad in einer entsprechenden Materialstärke ausgeführt sein muss. Damit geht auf Grund der radialen Ausdehnung des Sekundenrades und des dadurch gegebenen radial fernen Materials ein gewisses Trägheitsmoment einher.In the solution according to this document of the prior art, it is disadvantageous that the gear must be designed in a corresponding material thickness for the use of the eccentric. This is accompanied by a certain moment of inertia due to the radial extent of the second wheel and the resulting radially distant material.
Eine andere ältere Lösung dieses Problems ist aus der
Weitere Ausführungsformen sind in den abhängigen Ansprüchen angegeben. Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Einstellmöglichkeit für den Minutenzähler einer Uhr anzugeben, die in einfacher Weise diese Justagemöglichkeit gestattet.Further embodiments are given in the dependent claims. Based on this prior art, the present invention seeks to provide an adjustment for the minute counter of a clock, which allows this adjustment in a simple manner.
Erfindungsgemäss wird diese Aufgabe mit den Merkmalen des Anspruchs 1 gelöst.According to the invention this object is achieved with the features of claim 1.
Dadurch, dass das Minutenrad als dünnes Zahnrad zuunterst ausgeführt ist, ist es möglich, die Auslöseschnecke im Presssitz unterhalb des Nullstellherzens anzuordnen, sodass der Kopf des Exzenters in dem in grösserer Materialdicke ausgeführten Nullstellherz eingesetzt ist und der Finger des Exzenters in der ebenfalls in grösserer Materialdicke ausgeführten Auslöseschnecke. Diese beiden Elemente nehmen aber bei der Konstruktion naturgemäss einen geringeren Durchmesser ein, sodass die Einstellung gemäss der vorliegenden Erfindung mit einem geringeren Trägheitsmoment verbunden ist.The fact that the minute wheel is designed as a thin gear at the bottom, it is possible to arrange the trigger screw in a press fit below the zeroing heart, so that the Head of the eccentric is inserted in the executed in greater material thickness Nullstellherz and the finger of the eccentric in the also executed in greater material thickness trimming screw. However, these two elements inherently assume a smaller diameter in the construction, so that the adjustment according to the present invention is associated with a lower moment of inertia.
Vorteilhafterweise ist die der Zahl 6 der äusseren Form entsprechende Auslöseschnecke im Bereich zwischen kleinstem und grösstem Radius mit einer Ausnehmung versehen, die ein Zurückfedern der Nase des Minutenschalthebels gestattet.Advantageously, the number 6 of the external shape corresponding release screw in the region between the smallest and largest radius is provided with a recess which allows springing back of the nose of the minute shift lever.
Bevorzugte Ausführungsformen der Erfindung werden im Folgenden anhand der Zeichnungen beschrieben, die lediglich zur Erläuterung dienen und nicht einschränkend auszulegen sind. In den Zeichnungen zeigen:
- Fig. 1
- eine perspektivische Explosionsansicht eines Ausführungsbeispiels einer Einstellvorrichtung für den Minutenzähler einer Uhr;
- Fig. 2
- eine geschnittene Seitenansicht der Einstellvorrichtung gemäss
Fig. 1 ; und - Fig. 3
- eine Draufsicht auf die Einstellvorrichtung gemäss
Fig. 1 mit weiteren Bauteilen des Minutenzählrades.
- Fig. 1
- an exploded perspective view of an embodiment of a setting device for the minute counter of a clock;
- Fig. 2
- a sectional side view of the adjustment according to
Fig. 1 ; and - Fig. 3
- a plan view of the adjustment according to
Fig. 1 with further components of the minute counter.
Die
Ferner weist die Uhr vorteilhafterweise einen in den Zeichnungen nicht dargestellten Sekundenzeiger auf, dessen Zeigerspitze einer ebenfalls nicht dargestellten Sekundenskala folgt. Dabei steht der Sekundenzeiger in einer festen Winkellage mit dem Sekundenrad 20.Furthermore, the clock advantageously has a not shown in the drawings Second hand on whose pointer tip follows a second scale, also not shown. The second hand is in a fixed angular position with the
Die Auslöseschnecke 40 verfügt an ihrer radial umlaufenden Mantelfläche 41 über eine rampenartig ansteigende Schaltkurve, die von ihrem Punkt mit dem grössten Radius 42 radial auf einen Punkt mit dem geringsten Radius 44 übergeht. Dabei überwindet sie einen V-förmigen Einschnitt 43, der noch im weiteren beschrieben werden wird.The
Der nähere Zusammenbau der einzelnen Elemente ist besser aus der Schnittansicht der
Der dritte Aufnahmebereich 14 weist wiederum einen geringeren Durchmesser der Welle 10 als der zweite Aufnahmebereich 13 auf, sodass sich eine Stufe bildet, auf welcher die Auslöseschnecke 40 aufgesetzt ist. Die Auslöseschnecke 40 befindet sich dabei in einem Presssitz und ist bei Einwirken einer Kraft gegenüber der Welle 10 drehbar gelagert. In dem Nullstellherz 30 ist ein Exzenterloch 32 vorgesehen, welches in einem Abstand von der Achse 100 der zentralen Welle 10 angeordnet ist, die in der
Die Auslöseschnecke 40 selber verfügt über ein Langloch 45, welches radial zu seinem Befestigungsloch 46 verläuft, einen grösseren Durchmesser als das Exzenterloch 32 im Nullstellherz 30 aufweist und in radialer Richtung symmetrisch bezüglich der Drehachse 110 verläuft.The
In die beiden genannten Löcher 45 und 32 wird ein Exzenter 50 eingesetzt, dessen zylindrischer Finger 52 im wesentlichen passend zum Loch 32 ausgestaltet ist und in dieses eingreift. Der Zylinderkopf 51 des Exzenters 50, der ebenfalls zylindrisch ausgestaltet ist, aber eine andere Symmetrieachse aufweist, ist im Loch 45 eingesetzt. Damit kann durch Drehen des Kopfes 51 des Exzenters 50 über den Betätigungsschlitz 53 erreicht werden, dass sich die Position des Exzenterkopfes 51 in dem Langloch 45 zwischen der in der
Es ist festzuhalten, dass das radiale Langloch 45 diese Bewegung in grösserem Umfang ermöglicht, da bei einer passgenauen Paarung Loch 32-Finger 52 und Loch (45)-Kopf 51 die Einstellmöglichkeiten sehr limitiert wären, da mit jeder grösseren Drehung des Kopfes 52 des Exzenters 51 auch eine radiale Abstandsänderung des Kopfes 52 in der Auslöseschnecke 40 verbunden ist, da der Finger 52 zu einer solchen Anpassung in dem passgenauen Loch 32 nicht fähig ist.It should be noted that the
Bei einem in den Zeichnungen nicht dargestellten Ausführungsbeispiel ist das Loch 32 ein radiales Langloch für eine radiale Bewegung des Fingers 52 bei einer Drehbewegung des Exzenters mit einer Winkeleinstellung zwischen Auslöseschnecke 40 und Nullstellherz 30 und das Loch 45 ist ein gerade den Kopf 52 aufnehmendes durchgehendes Rundloch.In one embodiment, not shown in the drawings, the
In beiden Fällen könnte das Loch 32 im Nullstellherz 30 auch ein Sackloch sein.In both cases, the
Die
Aus der
Es hat sich in Versuchen herausgestellt, dass der Presssitz der Auslöseschnecke 40 für die beiden damit verbundenen Funktionen ausreichend ist. Zum einen sitzt die Auslöseschnecke 40 ausreichend sicher auf der zentralen Welle 10 und zum anderen ist es mit Hilfe eines Einsetzens eines Werkzeugs in den Schlitz 53 und der Ausübung einer Kraft für eine Drehung des Exzenterkopfes 51 möglich die Winkelstellung der Auslöseschnecke 40 bezüglich zu Nullstellherz 30 und Zahnrad 20 zu verändern. Dabei gestattet das Langloch 45 je nach Auslegung im Verhältnis vom Durchmesser des Exzenterkopfes 51 zum Durchmesser des Fingers 52 eine Winkelbewegung um einige Grad, beispielsweise zwischen 1 und 10. Grad oder 2 bis 5 Grad.It has been found in experiments that the interference fit of the
Vorteilhafterweise ist der Exzenter 50 durch die Anordnung des Loches 32 im Herz 31 so von der Achse 100 entfernt angeordnet; dass er vorzugsweise im Bereich der Hälfte der Schaltkurve 41 mit dem grösseren radialen Abstand von der Mitte vorgesehen ist, also jenseits (in der Zeichnung der
Alternativ kann auch die Öffnung 32 ein Langloch sein und die Öffnung 45 ein passgenaues Loch, so dass die Drehachse des Exzenters, die dann die Achse 110 ersetzt mit der Drehachse des Kopfes 51 übereinstimmt und der Finger 52 sich in einem Langloch bewegt. Das hier beschriebene Ausführungsbeispiel hat aber den Vorteil, dass, wie in der
Bei dem dargestellten Ausführungsbeispiel ist in Richtung der Längsachse der Welle 10 die Reihenfolge der Elemente Auslösekurve-Nullstellherz-Sekundenrad. In einem in den Zeichnungen nicht dargestellten Ausführungsbeispiel ist die Reihenfolge Nullstellherz-Auslösekurve-Sekundenrad, wo also die beiden oberen dickeren Elemente in umgekehrter Reihenfolge vorgesehen sind, was auf Grund der funktionalen Einstellung von Langloch 45 und Loch 32 möglich ist. Bei einem weiteren Ausführungsbeispiel ist das Sekundenrad 20 mit mindestens einem Durchbruch für den Exzenterkopf versehen, so dass es auch (im Hinblick auf die Zeichnung der
Claims (8)
- A minute hand of a timepiece, in particular of a chronograph, with a central arbor (10) which bears a seconds hand and which has a plurality of receiving regions (12, 13, 14), with a gearwheel (20) which is fixedly connected on the central arbor (10) for driving about the latter in a first receiving region (12), with a heart-shaped reset to zero mechanism (30) which is fixedly fastened on the central arbor (10) for driving about the latter in a second receiving region (13), with a release snail cam (40) which is arranged on the central arbor (10) for driving about the latter in a third receiving region (14) and which has a radially encircling control cam (41) which rises in a ramp-like manner and along which a trip-dog (61) of a minute control lever (60), which is pivotable about a pivot axis (62), slides under resilient prestress (63) during the rotational movement of the release snail cam (40) and, after a sliding distance corresponding to sixty seconds and overcoming the point of largest radius (42), drops onto the point of smallest radius (44) of the release snail cam (40), with a minute control pawl (71) which is arranged on the minute control lever (60) and by means of which, when the trip-dog (61) of the minute control lever (60) drops onto the point of smallest radius (44) of the control cam (41), a minute counter wheel (70) which is mounted rotatably (74) can be advanced by a minute step (72, 73), wherein the release point (42 to 44) of the advancement can be set in an adjustable manner by the minute control lever (60), characterized in that the release snail cam (40) is arranged in an interference fit in the third receiving region (14) of the central arbor (10), in that the release snail cam (40) has an opening (45) for receiving the head (51) of an eccentric (50), in that the heart-shaped reset to zero mechanism (30) has an opening (32) for receiving the finger (52) of the eccentric (50), and therefore, by rotation of the eccentric head (51) via the heart-shaped reset to zero mechanism (30) sitting fixedly on the central arbor (10), the release snail cam (40) can be rotated by an angle about the central arbor (10) relative to the gearwheel (10) for setting the release point (42 to 44) of the advancement by the minute control lever (60).
- The minute hand as claimed in claim 1, characterized in that the release snail cam (40) has a recess (43) behind the radial connection between the point of the largest radius (42) and the point of the smallest radius (44).
- The minute hand as claimed in claim 1 or 2, characterized in that the central axis (110) of the opening (32) in the heart-shaped reset to zero mechanism (30) is provided within an angular range of -30 and +30 degrees about the imaginary connection between the axis of rotation (100) and the point (34) of the heart-shaped reset to zero mechanism (30) in order to obtain as large a distance as possible of the axis of rotation (110) of the eccentric from the axis of rotation (100).
- The minute hand as claimed in claim 3, characterized in that the central axis (110) of the opening (32) in the heart-shaped reset to zero mechanism (40) is provided within an angular range of 15 to 30 degrees on that side of the imaginary connection between the axis of rotation (100) and the point (34) of the heart-shaped reset to zero mechanism (30) on which the release snail cam (40) has a larger radius of the control cam (41) thereof.
- The minute hand as claimed in one of claims 1 to 4, characterized in that the eccentric (50) has a cylindrical head (51) and a cylindrical finger (52), the longitudinal axis (110) of which does not coincide with the longitudinal axis of the cylindrical head (51), wherein the opening (45) receiving the cylindrical head (51) is a radially oriented elongated hole and the opening (32) receiving the cylindrical finger (52) is an opening which substantially precisely receives the finger (52).
- The minute hand as claimed in one of claims 1 to 5, characterized in that the sequence of the receiving regions (12, 13, 14) on the central arbor (10), as seen from the engagement side of the actuating element (53) of the eccentric, is release snail cam (40), heart-shaped reset to zero mechanism (30) and gear wheel or fourth wheel (20).
- The minute hand as claimed in one of claims 1 to 5, characterized in that the sequence of the receiving regions (12, 13, 14) on the central arbor (10), as seen from the engagement side of the actuating element (53) of the eccentric, is heart-shaped reset to zero mechanism (30), release snail cam (40) and gear wheel or fourth wheel (20).
- The minute hand as claimed in one of claims 1 to 5, characterized in that the fourth wheel (20) has at least one aperture for receiving the eccentric head (51), and in that the sequence of the receiving regions (12, 13, 14) on the central arbor (10), as seen from the engagement side of the actuating element (53) of the eccentric, is fourth wheel (20), and then heart-shaped reset to zero mechanism (30) and release snail cam (40) in a predetermined sequence.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH02474/12A CH707233A1 (en) | 2012-11-22 | 2012-11-22 | Minutzenzähler a watch, in particular a chronograph. |
PCT/EP2013/073597 WO2014079736A1 (en) | 2012-11-22 | 2013-11-12 | Minute hand of a timepiece, in particular of a chronograph |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2923241A1 EP2923241A1 (en) | 2015-09-30 |
EP2923241B1 true EP2923241B1 (en) | 2016-12-28 |
Family
ID=49596271
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13792317.3A Not-in-force EP2923241B1 (en) | 2012-11-22 | 2013-11-12 | Minute hand of a timepiece, in particular of a chronograph |
Country Status (6)
Country | Link |
---|---|
US (1) | US9651919B2 (en) |
EP (1) | EP2923241B1 (en) |
JP (1) | JP6149121B2 (en) |
CN (1) | CN104823117B (en) |
CH (1) | CH707233A1 (en) |
WO (1) | WO2014079736A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3324245A1 (en) * | 2016-11-17 | 2018-05-23 | Nogerah SA | Instantaneous drive system and chronograph mechanism provided with such a system |
EP3486735B1 (en) * | 2017-11-20 | 2020-09-30 | Montres Breguet S.A. | Second reset clock mechanism with snail cam |
EP3540522B1 (en) * | 2018-03-13 | 2020-10-28 | Harry Winston SA | Retrograde display mechanism for a timepiece |
EP3677970A1 (en) * | 2019-01-07 | 2020-07-08 | Rolex Sa | Drive device for a display element |
EP3869280B1 (en) * | 2020-02-19 | 2024-04-17 | Montres Breguet S.A. | Timepiece display mechanism |
EP3985447A1 (en) * | 2020-10-19 | 2022-04-20 | Glashütter Uhrenbetrieb GmbH | Adjustable lever of a tourbillon mechanism and a method of adjustment |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR849143A (en) | 1938-05-25 | 1939-11-14 | Ebauches Sa | Chonograph mechanism |
CH209683A (en) * | 1939-02-03 | 1940-04-30 | Jacot Guyot Henri | Chronograph mechanism. |
GB1454624A (en) * | 1973-08-30 | 1976-11-03 | Suwa Seikosha Kk | Electric timepiece |
DE19852347C2 (en) | 1998-11-13 | 2001-02-08 | Lange Uhren Gmbh | Minute counter of a clock |
EP1746471B1 (en) * | 2005-07-20 | 2019-09-18 | Breitling AG | Return-to-zero device for two time counters |
DE05405596T1 (en) * | 2005-10-21 | 2007-10-11 | Rolex Sa | Clock with a mechanism for measuring adjustable predetermined time periods |
CH702137B1 (en) | 2007-02-05 | 2011-05-13 | Patek Philippe Sa Geneve | Device for driving and setting an instantaneous counter and timepiece including such a device. |
DE602007010418D1 (en) * | 2007-02-22 | 2010-12-23 | Eta Sa Mft Horlogere Suisse | Chronograph |
DE602008004125D1 (en) * | 2008-06-17 | 2011-02-03 | Montres Breguet Sa | Display device for displaying one or the other of two different indications with the same display element of a clock |
CH700753B1 (en) * | 2009-04-15 | 2014-03-14 | Patek Philippe Sa Geneve | Mechanism of instantaneous counter and snail cam for such a mechanism. |
-
2012
- 2012-11-22 CH CH02474/12A patent/CH707233A1/en not_active Application Discontinuation
-
2013
- 2013-11-12 WO PCT/EP2013/073597 patent/WO2014079736A1/en active Application Filing
- 2013-11-12 JP JP2015543388A patent/JP6149121B2/en not_active Expired - Fee Related
- 2013-11-12 EP EP13792317.3A patent/EP2923241B1/en not_active Not-in-force
- 2013-11-12 US US14/646,135 patent/US9651919B2/en active Active
- 2013-11-12 CN CN201380061124.4A patent/CN104823117B/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
WO2014079736A1 (en) | 2014-05-30 |
EP2923241A1 (en) | 2015-09-30 |
JP6149121B2 (en) | 2017-06-14 |
CN104823117A (en) | 2015-08-05 |
CH707233A1 (en) | 2014-05-30 |
US20150301503A1 (en) | 2015-10-22 |
JP2016502081A (en) | 2016-01-21 |
CN104823117B (en) | 2017-10-03 |
US9651919B2 (en) | 2017-05-16 |
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