EP3876043A1 - Nullstellungssystem eines chronographen - Google Patents

Nullstellungssystem eines chronographen Download PDF

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Publication number
EP3876043A1
EP3876043A1 EP21153632.1A EP21153632A EP3876043A1 EP 3876043 A1 EP3876043 A1 EP 3876043A1 EP 21153632 A EP21153632 A EP 21153632A EP 3876043 A1 EP3876043 A1 EP 3876043A1
Authority
EP
European Patent Office
Prior art keywords
hammer
chronograph
resetting
mobile
flexible element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21153632.1A
Other languages
English (en)
French (fr)
Other versions
EP3876043B1 (de
Inventor
Jean-Philippe Rochat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Montres Breguet SA
Original Assignee
Montres Breguet SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Montres Breguet SA filed Critical Montres Breguet SA
Publication of EP3876043A1 publication Critical patent/EP3876043A1/de
Application granted granted Critical
Publication of EP3876043B1 publication Critical patent/EP3876043B1/de
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
    • G04F7/0804—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
    • G04F7/0804—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
    • G04F7/0819—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms with triple hammer, i.e. one hammer acts on three 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
    • G04F7/0804—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
    • 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
    • G04B27/00—Mechanical devices for setting the time indicating means
    • 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
    • G04B27/00—Mechanical devices for setting the time indicating means
    • G04B27/001—Internal gear therefor, e.g. for setting the second hand or for setting several clockworks

Definitions

  • the invention relates to a system for resetting a chronograph.
  • the system is provided with a chronograph counting train, which comprises at least one minute counter having a minute mobile, and a seconds counter, which includes a chronograph mobile.
  • the system comprises a hammer held blocked by a blocking means and movable from an inactive position, where the hammer is blocked by the blocking means, and an active position, when the hammer is released, for resetting the chronograph in contact. different mobiles.
  • a chronograph mechanism comprises a chronograph counting train, which makes it possible to count time from the second by means of a chronograph mobile or seconds counter, to the minute by means of a minute counter, and possibly to the second. hour by means of an hour counter.
  • Each counter includes an indicator member moving on a corresponding graduated scale.
  • the indicator members are traditionally indexed to an angular position corresponding to the zero of each graduated scale.
  • each indicator member is generally carried by the axis of a corresponding element of the gear train. The connection between the element of the train and its axis is friction to allow these two members, an independent angular displacement, beyond a certain torque.
  • Indicator organs are indexed by means of heart and hammer mechanisms correspondents. The use of friction links and mechanisms of hearts and hammers means that the torque to be supplied when resetting the various counters can be large, and a lot of energy is consumed.
  • buckling By way of comparison, in a traditional chronograph timepiece, a so-called “buckling” device is often used. Such a device creates a hard point when a push-button is pressed and once the hard point has passed, by an inertia effect the function for resetting is performed. It should be noted that the spring which is pressed and which has passed the hard point has a negative friction effect throughout its function for resetting, and a large amount of energy is consumed.
  • the patent application EP 2 884 350 A2 describes a device for resetting a chronograph watch.
  • the device comprises in particular hammers and means for locking the hammers. Springs are arranged between control means and each hammer.
  • the reset hammers can pivot independently of one another and cooperate with a corresponding reset cam, for resetting the chronograph.
  • the object of the invention is therefore to overcome the drawbacks of the state of the art by providing a system for resetting a chronograph, in particular a timepiece.
  • An objective of the invention is precisely to benefit from an accumulation of energy from a flexible element, such as an on-board spring, linked to a hammer to restore this energy when the hammer is released for resetting the device. chronograph.
  • the invention relates to a system for resetting a chronograph, which comprises the characteristics defined in independent claim 1.
  • An advantage of the system for resetting a chronograph according to the invention lies in the fact that it comprises a flexible element fixed by a first end to an upper end of a hammer, and by a second end to a first portion.
  • a control rocker mounted to rotate on a base or a frame or a plate of the timepiece.
  • an external activation member such as a push-button
  • a chronograph reset operation an external activation member, such as a push-button, is pressed on a second portion of the control lever causing the lever to turn around its axis of rotation, and thus driving the second end of the flexible element, such as an on-board spring, with a certain force so that it stores energy during this operation.
  • Another advantage of the system for resetting a chronograph according to the invention lies in the fact that it comprises a means for locking the hammer, which is preferably a hook member rotatably mounted on a base or frame or plate. the timepiece and blocking the hammer by a fixed pin mounted on the hammer when the hook at one end hooks onto the pin.
  • a means for locking the hammer which is preferably a hook member rotatably mounted on a base or frame or plate. the timepiece and blocking the hammer by a fixed pin mounted on the hammer when the hook at one end hooks onto the pin.
  • this end of the second portion of the control rocker is initially remote from and facing the second end of the hook member.
  • This flexible element still stores energy until the moment when the hook of the first end of the hook member is no longer in contact with the locking pin. After that, the hammer is driven by the first end of the flexible element having stored enough energy that it releases to carry out a resetting of the chronograph.
  • the system allows energy to be stored through the flexible element to perform a function of resetting the chronograph to zero, and also allows frank triggering without friction via the hook member. when releasing the hammer to reset the chronograph.
  • the figures 1a and 1b show a bottom view of the main elements of a system 1 for resetting a chronograph in a position before the resetting operation. It is normally also made up of a chronograph 2 counting train, which is presented in more detail in the figures 4 and 5 described below. It can be envisaged to mount the reset system 1 in a timepiece comprising a basic time movement and a chronograph movement, which can be autonomous with its own movement, and therefore its own barrel. However, provision can also be made for using the basic movement of the timepiece with the chronograph.
  • the zero-reset system 1 comprises a chronograph mobile 3, which is normally the seconds mobile, which is part of the chronograph counting train 2 of the figures 4 and 5 .
  • This chronograph counting train comprises in particular a minute counter, which comprises a minute mobile 4, and a seconds counter, which comprises a chronograph mobile 3.
  • the chronograph counting train may also include an hour counter, which comprises an hour counter.
  • the mobile chrono or seconds 3 comprises a heart 13 mounted on the central axis 23 of the mobile chrono, this heart 13 constitutes a cam shape.
  • the minutes mobile 4 comprises a heart 14 mounted on the central axis 24.
  • the hours module 5 comprises a heart 15 mounted on the central axis 25.
  • a timepiece equipped with a chronograph usually comprises chronograph mobiles, which are mounted to pivot in friction on a frame or a plate of the timepiece. This means that when resetting the chronograph, it is possible to turn with sufficient torque the moving parts held only by friction by their axis in an opening provided for this purpose, until the chronograph reset indication. .
  • the reset system 1 mainly comprises a flexible element 10, which may be an on-board spring, which is connected between a reset control means 12 and an end part of the hammer 6, which is used for the reset. to zero of the chronograph.
  • the flexible element 10 is configured in such a way as to store energy during a movement of the control means 12 and before the release of the hammer 6 blocked by a locking means 11 to be able at the time of the release of the hammer 6 to restore this stored energy and drive the hammer 6 to reset the chronograph.
  • the flexible element 10 is linked by a first end 10a to the hammer 6, for example to an end part of the hammer 6 used for resetting the chronograph.
  • a pin 19 is inserted at the first end 10a of the flexible element 10 and is accommodated in an elongated opening 9 made at a flat upper end of the hammer 6.
  • the second end 10b of the flexible element 10 is fixed to the control means. 12, which is mounted on the base or the frame or the plate of the timepiece, and is used during the operation of resetting the chronograph.
  • the flexible element 10, such as the on-board spring is of arcuate shape between its first end 10a and its second end 10b. This arcuate shape in the direction of an external activation member B, such as a push-button, which can act on the control means 12, can be adapted to improve the energy stored before resetting the chronograph to zero.
  • the control means 12 is preferably a control lever, for example planar, which is rotatably mounted preferably by a fixing element 22, which is rather a screw 22 passing through a central opening of the control lever and which is fixedly screwed on. in a corresponding thread in the base or the frame or the plate of the timepiece.
  • This control lever 12, which is rotatably mounted around the axis defined by the screw 22, comprises a first portion of a first side of the axis, to which is fixed by studs 40 or other fixing means, the second end 10b of the flexible element 10.
  • the control lever 12 further comprises a second portion of a second side of the axis of rotation opposite to the first side, and at one end of which a push-button B can act for resetting the chronograph.
  • the hammer 6 in a blocked position, the hammer 6 is kept blocked by a blocking means 11.
  • the push-button B presses the second portion of the lever. rotary control 12 and therefore acts first on the flexible element from its second end 10b to effect an accumulation of energy before the effective release of hammer 6, which occurs by pressing push-button B even further.
  • the hammer 6 is preferably a metal plate, and is mounted in translation with a first longitudinal opening 7 and a second longitudinal opening 8 in which are placed fixed rods 17, 18, which are for example a first screw 17 and a second screw 18. These two screws 17, 18 can be screwed into the threads provided for this purpose on a base or frame or plate of the timepiece not shown, but leaving the hammer free to move between an inactive locking position and a active reset position.
  • the two longitudinal openings 7, 8 are preferably of the same length and on the same line over the length of the hammer 6. The length of the longitudinal openings is adapted such that the hammer 6 can occupy an inactive locking position and an active position. of resetting the chronograph in contact with the various hearts 13, 14 of the mobiles 3, 4 or also of the heart 15 of the mobile 5 explained below.
  • the locking means 11 of the hammer 6 is preferably a hook member 11 rotatably mounted on the hammer 6.
  • the hook member 11 of planar shape comprises a central opening through which passes the second screw 18, the thread of which is in the second longitudinal opening 8 of the hammer 6 defined as the upper side of the hammer 6, where the push-button B acts.
  • the hook member 11 comprises at a first end 11a, a hook for hooking onto a pin 26 fixed vertically on the hammer 6 near the second longitudinal opening 8 and between the two longitudinal openings 7, 8 of the hammer 6.
  • the second end 11b of the hook member 11, which is located on an opposite side with respect to the The axis of rotation of the second screw 18 comprises a rod 21 by which a first free end of a return spring 31 of the hook member 11 can act to return the hook member 11 to a locking position of the hook member 11.
  • a second end é of the return spring 31 can be fixed by a screw 51 screwed into a corresponding thread made in the base or the frame or the plate of the timepiece.
  • an inner end 12 'of the second portion of the rotary control lever 12 is disposed opposite and distant from the second end 11b of the hook member 11.
  • the flexible element 10 first of all stores energy by the rotation of the control rocker 12 following the pressure on the push-button B.
  • the element hose 10 stores energy already before the inner end 12 'of the second portion of the control lever 12 pushes the second end 11b of the hook member 11, and this until the moment when the hook of the first end 11a of the hook member 11 no longer catches the pin 26 of the hammer 6, which makes it possible to have a clear release without additional friction.
  • the hammer 6 is no longer in a blocked position and can act more easily for resetting the chronograph firstly thanks to the return of the energy stored by the flexible element 10 and subsequently by the press of push button B of a user.
  • the operation of resetting the chronograph is facilitated.
  • the hammer 6 is pushed by the flexible element 10 from its first end 10a and in the direction of the various mobiles 3, 4, 5, in particular the hearts 13, 14, 15 of the mobiles.
  • the hammer 6 comprises three contact portions 16a, 16b, 16c.
  • a first contact portion 16a arranged on the hammer 6 comes into contact with the heart 13 of the chronograph mobile 3.
  • a second contact portion 16b arranged on the hammer 6 comes into contact with the heart 15 of the hours mobile 5.
  • the first contact portion 16a and the second contact portion 16b form an assembly rotatably mounted about an axis 37 on the hammer 6 near the first opening longitudinal 17.
  • An angular stop 36 is provided between the first contact portion 16a and the second contact portion 16b. This stop 36 passes with a certain clearance in a central opening of the assembly, which makes it possible to compensate for the geometric defects of the components.
  • This third contact portion 16c is connected by a band U-shaped metal, and its end opposite the contact portion is fixed by studs 43 or other fastening means to the upper end of the hammer 6.
  • An adjusting eccentric 44 is fixed in a corresponding hole at the end upper hammer 6 to adjust the position of the third contact portion 16c.
  • each flat of the hearts 13, 14, 15 are held in a zero position by each respective contact portion 16a, 16b, 16c.
  • the screws or other rods 17 and 18, which are in each longitudinal opening 7 and 8, are at a high end of the longitudinal openings 7 and 8 when resetting and before being placed in an inactive locking position of the hammer 6 a after pushbutton B is released.
  • the length of each longitudinal opening 7 and 8 is determined such that each screw 17 and 18 can move from an inactive position when locking hammer 6 and an active reset position.
  • a minute hand 34 must be frictionally connected to the axis 24 to indicate the chronograph minutes on a dial, not shown, of the timepiece.
  • a 35 hour hand should be frictionally connected to the 25 axis to indicate the chronograph hours on the dial, not shown, of the timepiece. The same can be done for the chronograph seconds indication, but no hand is shown.
  • the figure 2 which only shows the bottom view of the chronograph reset system, just illustrates in an illustrative manner the energy stored by the flexible element 10 just before the release of the hammer 6 when the hook at the first end 11a of the hook member 11 releases it from the blocking.
  • the second end 10b of the flexible element 10 tends to rotate clockwise, straightening the flexible element 10 and thus storing energy to be restored during resetting the chronograph.
  • all the other components of the figure 2 will not be repeated since they have already been explained with reference to the figures 1a and 1b .
  • the figures 4 and 5 following shows a chronograph counting train 2, which comprises on the one hand a minute train at the figure 4 and on the other hand a cog of hours at the figure 5 .
  • the different wheels for the minute train and the hour train are shown connected. by broken lines.
  • a first toothed wheel 62 disposed on the axis 23 of the chronograph mobile 3 meshes with an intermediate wheel 63, the diameter of which is greater than the diameter of the first toothed wheel 62.
  • a second intermediate wheel 64 of smaller diameter is placed on the intermediate wheel 63 to drive a wheel of the hour train explained below.
  • a third coaxial proximal intermediate wheel 65 and of smaller diameter than the intermediate wheel 63 makes it possible to drive a large wheel 66 mounted on the axis 24 of the minute mobile 4.
  • the size of each wheel is of course determined as a function of time. counted and displayed to go from the second with a first indicator member to the minute with a second indicator member, such as a hand 34 on a dial, not shown.
  • the figure 5 mainly represents the cog of the hours.
  • the first toothed wheel 62 disposed on the axis 23 of the chronograph mobile 3 meshes with the intermediate wheel 63, the diameter of which is greater than the diameter of the first toothed wheel 62.
  • the second intermediate wheel 64 of smaller diameter meshes with a second intermediate wheel 68 of larger diameter which itself comprises below another small intermediate wheel which is intended to drive another large wheel 67, of which a proximal wheel of smaller diameter on the same axis drives an hour wheel 69.
  • the size of each wheel is of course determined as a function of the time counted and to be displayed in order to switch from the second with a first indicator member to the time with a third indicator member, such as a hand 35 on a dial, not shown.
  • FIG 6 shows a bottom view of the main elements of another embodiment of a system 1 for resetting a chronograph in a position before the resetting operation.
  • the same elements described in figure 1a will therefore not be repeated, but on the other hand, the new elements are described in relation to the hook member 11 and a new third contact portion 16c.
  • the hook member 11 is rotatably mounted about an axis 45 at a first end, and the second end 11b is in contact with an inner end 12 'of the second portion of the control lever 12.
  • a support 11a of an intermediate part of the hook member 11 is placed in contact with the pin 26 of the hammer 6.
  • the new third contact portion 16c is a so-called flexible tip, which comprises flexible blades 46 serving to adjust the force in contact with the core 14. These flexible blades 46 are arranged on either side of the central part of the so-called tip. flexible, and substantially parallel to each other.
  • This so-called flexible purlin is fixed to one end of the hammer 6 by means of screws or studs 43 in the oblong-shaped openings to adjust the positioning before fixing. With this configuration of this so-called flexible fault, this makes it possible to compensate for the geometric faults of the components and ensures correct reset to zero by an identical contact on the three cores of the moving parts (hyperstatic system). In this configuration, it is no longer necessary to use a mechanical adjustment as shown in particular in figures 1a and following.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
EP21153632.1A 2020-03-05 2021-01-27 Nullstellungssystem eines chronographen Active EP3876043B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20161120.9A EP3876042B1 (de) 2020-03-05 2020-03-05 Nullstellungssystem eines chronographen

Publications (2)

Publication Number Publication Date
EP3876043A1 true EP3876043A1 (de) 2021-09-08
EP3876043B1 EP3876043B1 (de) 2023-11-29

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP20161120.9A Active EP3876042B1 (de) 2020-03-05 2020-03-05 Nullstellungssystem eines chronographen
EP21153632.1A Active EP3876043B1 (de) 2020-03-05 2021-01-27 Nullstellungssystem eines chronographen

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Application Number Title Priority Date Filing Date
EP20161120.9A Active EP3876042B1 (de) 2020-03-05 2020-03-05 Nullstellungssystem eines chronographen

Country Status (4)

Country Link
US (1) US11687043B2 (de)
EP (2) EP3876042B1 (de)
JP (1) JP7066889B2 (de)
CN (1) CN113359405B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH718458A9 (fr) * 2021-03-18 2022-11-30 Mft Dhorlogerie Audemars Piguet Sa Mécanisme d'actionnement pour mouvement horloger, en particulier mécanisme de chronographe comportant un tel mécanisme d'actionnement.
EP4290316A1 (de) 2022-06-09 2023-12-13 Manufacture d'Horlogerie Audemars Piguet SA Steuervorrichtung für ein uhrwerk, entsprechendes uhrwerk und uhrenteil
WO2023248178A1 (fr) * 2022-06-23 2023-12-28 Lvmh Swiss Manufactures Sa Mécanisme de commande d'horlogerie a comportement bistable
WO2023248177A1 (fr) 2022-06-23 2023-12-28 Lvmh Swiss Manufactures Sa Mécanisme de commande d'horlogerie a comportement bistable

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1746471A1 (de) * 2005-07-20 2007-01-24 Breitling AG Null-Rückstellungsvorrichtung für zwei Zeitzähler
EP1890205A1 (de) * 2006-08-15 2008-02-20 Chopard Manufacture SA Vorrichtung zur Nullrückstellung für eine Uhr
EP2073078A1 (de) * 2007-12-21 2009-06-24 Omega SA Bistabiler hammer für chronographenmechanismus
CH704752B1 (fr) * 2008-03-31 2012-10-15 Manuf La Joux Perret Sa Marteau linéaire de chronographe..
EP2884350A2 (de) 2013-12-16 2015-06-17 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Nullrückstellvorrichtung mit unabhängigen Hämmern

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5168843B2 (ja) 2006-03-03 2013-03-27 セイコーエプソン株式会社 クロノグラフ時計
CH698827B1 (fr) * 2006-08-15 2009-11-13 Chopard Manufacture Sa Dispositif de remise à zéro pour une pièce d'horlogerie.
JP5350774B2 (ja) * 2008-12-25 2013-11-27 セイコーインスツル株式会社 クロノグラフ時計
US9146541B2 (en) * 2011-06-29 2015-09-29 Rolex S.A. Device for resetting to a predetermined position an indicator member indicative of a parameter connected with time
EP3059643B1 (de) * 2015-02-23 2017-07-19 Montres Breguet S.A. Uhrmechanismus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1746471A1 (de) * 2005-07-20 2007-01-24 Breitling AG Null-Rückstellungsvorrichtung für zwei Zeitzähler
EP1890205A1 (de) * 2006-08-15 2008-02-20 Chopard Manufacture SA Vorrichtung zur Nullrückstellung für eine Uhr
EP2073078A1 (de) * 2007-12-21 2009-06-24 Omega SA Bistabiler hammer für chronographenmechanismus
CH704752B1 (fr) * 2008-03-31 2012-10-15 Manuf La Joux Perret Sa Marteau linéaire de chronographe..
EP2884350A2 (de) 2013-12-16 2015-06-17 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Nullrückstellvorrichtung mit unabhängigen Hämmern

Also Published As

Publication number Publication date
EP3876042A1 (de) 2021-09-08
EP3876042B1 (de) 2023-12-06
CN113359405A (zh) 2021-09-07
CN113359405B (zh) 2022-05-31
JP2021139889A (ja) 2021-09-16
US11687043B2 (en) 2023-06-27
EP3876043B1 (de) 2023-11-29
US20210278808A1 (en) 2021-09-09
JP7066889B2 (ja) 2022-05-13

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