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EP3822711A1 - Uhrwerkmechanismus, der eine mit einer angetriebenen feder zusammenwirkende treibende feder umfasst - Google Patents

Uhrwerkmechanismus, der eine mit einer angetriebenen feder zusammenwirkende treibende feder umfasst Download PDF

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Publication number
EP3822711A1
EP3822711A1 EP20207261.7A EP20207261A EP3822711A1 EP 3822711 A1 EP3822711 A1 EP 3822711A1 EP 20207261 A EP20207261 A EP 20207261A EP 3822711 A1 EP3822711 A1 EP 3822711A1
Authority
EP
European Patent Office
Prior art keywords
mobile
driven
driving
inertia
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.)
Pending
Application number
EP20207261.7A
Other languages
English (en)
French (fr)
Inventor
Samuel Tanner
Jean-Baptiste LE BRIS
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.)
Patek Philippe SA Geneve
Original Assignee
Patek Philippe SA Geneve
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 Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Publication of EP3822711A1 publication Critical patent/EP3822711A1/de
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/006—Clutch mechanism between two rotating members with transfer of movement in only one direction (free running devices)
    • G04B11/008—Clutch mechanism between two rotating members with transfer of movement in only one direction (free running devices) with friction members, e.g. click springs or jumper
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/02—Back-gearing arrangements between gear train and hands

Definitions

  • the present invention relates to a timepiece mechanism comprising a driving body and a driven body, said driving body being intended to transmit, during at least one shock, at least one pulse to said driven body capable of causing said driven body to move.
  • Watchmaking mechanisms of this type are known for which the impulse is desired and necessary for the driving mobile to cause the driven mobile to set in motion.
  • a horological mechanism is, for example, a date correction mechanism in which the driving wheel set is a date correction wheel set provided with a driving finger and the driven wheel unit is a date star linked to a date disc, said wheel wheel set. correction being arranged so that its driving finger, subjected to a strong acceleration, delivers a punctual impulse during an impact between said driving finger and the date star, causing said date star and its date disc to advance by one step .
  • the movement of the date star and of its date disc is designed to be a single step per pulse delivered by the correction mobile.
  • the displacement of the date star may accidentally be greater than the theoretical pitch, so that, in this case, the correction of the date will not be correct.
  • Such a mechanism is for example a mechanism for correcting an hour hand preferably arranged to be actuated by a winding stem, and comprising a first hour wheel driven by a timer gear linked to the roadway. which carries the minute hand and a second hour wheel carrying the hour hand and connected to the first hour wheel by an elastic coupling mechanism.
  • Such a mechanism makes it possible to advance the hour hand one hour step by step without driving the minute hand. This allows very easy time setting in the event of a change of time zone for example.
  • the elastic coupling mechanism comprises a star integral with the first hour wheel as well as a jumper and its return spring against the star, carried by the second hour wheel.
  • This elastic coupling mechanism allows the first hour wheel to drive the second hour wheel to display the time while providing a clutch / disengage function and selective indexing of the hour hand in one. of its twelve angular positions in case of correction of the hour hand. More particularly, when correcting the hour hand alone, the second hour wheel is actuated by the winding stem so that, by turning, the jumper carried by the second hour wheel is lifted by a tooth of the he star carried by the first hour wheel which remains fixed, then falls between two teeth of the star.
  • the present invention aims to remedy these drawbacks by proposing a clock mechanism making it possible to control the setting in motion of a driven mobile working with a leading mobile, this control meaning preventing any setting in motion of the driven mobile or authorizing a predetermined displacement of said mobile. conducted, depending on the destination of said watch mechanism.
  • the present invention relates to a horological mechanism comprising a driving mobile and a driven mobile, said driving mobile being intended to transmit, during at least one shock, at least one impulse to said driven mobile capable of causing the setting in motion. of said driven mobile.
  • the driving body and the driven body are configured to have respectively moments of inertia such that the ratio of the moment of inertia of the driven body to the moment of inertia of the driving body is greater than 0.9, so controlling the setting in motion of said mobile driven by the driving mobile.
  • Such control of the setting in motion of the mobile driven by the leading mobile allows, depending on the destination of the watch mechanism of the invention, either to stop a planned but unwanted impulse of the leading mobile on the driven mobile and thus prevent its propagation to said driven mobile as well as to other components of the mechanism linked to said driven mobile, or to give the driven mobile the impulse which is only necessary for its movement as provided for by its function.
  • the present invention also relates to a timepiece comprising a timepiece mechanism as described above.
  • the present invention also relates to a method for controlling the setting in motion of a mobile driven by a driving mobile of a watch mechanism, said driving mobile being intended to transmit, during at least one shock, at least one impulse to said mobile.
  • driven capable of causing the setting in motion of said driven mobile, method in which said driving mobile and said driven mobile are arranged / configured to respectively present moments of inertia such as the ratio of the moment of inertia of the driven mobile to the moment d
  • the inertia of the leading part is greater than 0.9.
  • the expression driving mobile designates the component which, at the moment of impact, is intended to deliver an impulse as well as, if there are any, all the parts which are integral with it in rotation.
  • the expression driven mobile designates the component which, at the moment of impact, is intended to receive said impulse as well as, if there are any, all the parts which are integral with it in rotation.
  • the pulse whether it is voluntary or not, is provided and occurs during the normal operation of the mechanism. This typically excludes the case of an impulse associated with an accidental shock.
  • the present invention relates to a horological mechanism comprising a driving mobile working with a driven mobile. More specifically, the driving mobile is able to cooperate directly with the driven mobile, without a component. intermediary, or indirectly, via an intermediary mobile acting as a referral.
  • the horological mechanism according to the invention is typically such that the driving mobile is arranged to deliver to the driven mobile, during shocks, point pulses, by sudden instantaneous contact, in a desired manner, in order to be able to set said driven mobile in motion.
  • a mechanism is, for example, a date correction mechanism as described above in which the driving mobile is a date correction mobile provided with a driving finger and the driven mobile comprises a date star and a date disc which is therefor. is united.
  • the horological mechanism according to the invention is such that the driving mobile is intended to transmit to the driven mobile, during an impact, by sudden instantaneous contact, and in a planned but involuntary manner, at least one pulse such that it could cause an unwanted setting in motion of said driven mobile.
  • a mechanism is for example a mechanism for correcting an hour hand as described above, said mechanism comprising a first hour wheel driven by a timer gear linked to the roadway which carries the minute hand and secured to it. a star and a second hour wheel carrying the hour hand and connected to the first by an elastic coupling mechanism, said second wheel carrying a jumper cooperating with said star.
  • the driving mobile when setting the time, typically comprises said second hour wheel as well as the hour hand and the jumper that it carries and the driven mobile typically comprises the first hour wheel and the hour hand. star she wears.
  • the definition of the leading / leading roles corresponds to the roles of the two mobiles involved at the time of the shock, independently of their roles when there is no shock.
  • the driving mobile is defined as being the mobile which, during the impact, is intended to deliver an impulse to the driven mobile, even if there is a mode of shock-free operation in which the leading / leading roles can be reversed.
  • the driving mobile and the driven mobile are arranged or configured to respectively present moments of inertia such that the ratio of the moment of inertia of the driven mobile to the moment of inertia of the leading mobile is greater than 0.9 , so as to control the setting in motion of said driven mobile.
  • the driven mobile has a moment of inertia which approaches, and preferably which is greater, or even much greater, than that of the driving mobile, the ratio of the moments of inertia being chosen so that, during a shock from the mobile leading to the driven mobile, a planned but involuntary impulse from the mobile leading to the driven mobile is stopped by the driven mobile, preventing any unwanted setting in motion, its speed remaining zero or so that a voluntary impulse of the driving mobile working with the driven mobile gives said driven mobile an angular acceleration of a determined value which is only necessary for its displacement as provided for by its function.
  • the ratio of the moment of inertia of the driven part to the moment of inertia of the driving part is greater than or equal to 1, preferably greater than or equal to 1.2, preferably greater than or equal to 1.5, preferably greater than or equal to to 2, and more preferably greater than or equal to 3.
  • This may result, for example, by a difference between the moment of inertia of the driven body and the moment of inertia of the driving body greater than or equal to 0 mg * mm 2 preferably greater than or equal to 20 mg * mm 2 , preferably greater than or equal to 50 mg * mm 2 , preferably greater than or equal to 100 mg * mm 2 , and more preferably greater than or equal to 200 mg * mm 2 .
  • the horological mechanism of the present invention is particularly suitable when one of the driving mobile and the driven mobile comprises a jumper and the other of the leading mobile and the driven mobile comprises a star, said jumper being intended to exert on said star, when shock, a torque greater than 10 g.mm, preferably greater than 40 g.mm, preferably greater than 60 g.mm, preferably greater than 100 g.mm, and more preferably greater than 200 g.mm.
  • the watch mechanism of the present invention is also suitable when it has an instantaneous or almost instantaneous function, according to which the driving body suddenly receives an angular acceleration greater than 0.001 rad * ms -2 , and in particular greater than 0.1 rad * ms - 2 , before delivering a pulse to the driven mobile.
  • the speed of the driven mobile just before the impulse transmitted by the leading mobile is considered to be zero.
  • the watch mechanism of the invention constitutes a mechanism for correcting an hour hand 1, preferably arranged to be actuated by a winding stem and not a pusher.
  • this time-setting mechanism used more particularly in the event of a change of time zone, makes it possible to advance the hour hand one hour step by step without driving the minute hand.
  • the mechanism 1 comprises a first hour wheel 2 driven by a timer gear linked to the roadway which carries the minute hand. These elements, known to those skilled in the art, are not represented or described in detail here.
  • the mechanism also comprises a second hour wheel 4 carrying the hour hand (not shown) and arranged so that the first hour wheel 2 and the second hour wheel 4 are superimposed and concentric.
  • the first hand hour wheel 2 can carry said first hand to indicate the home time, the second hour wheel 4 then carrying the hand to indicate local time.
  • the second hour wheel 4 is connected to the first hour wheel 2 by an elastic coupling mechanism.
  • the elastic coupling mechanism comprises a star 6 with twelve teeth integral here with the first hour wheel 2 as well as a jumper 8 biased against the star 6 by its return spring 10, carried here by the second hour wheel 4.
  • the jumper 8 and its return spring 10 are positioned on the plate of the second hour wheel 4.
  • the driving mobile according to the invention comprises the second hour wheel 4 and the driven mobile comprises the first hour wheel 2, driven by the timer gear linked to the roadway, the leading / driven roles being the roles of the moving bodies during the time correction, when the second hour wheel 4 is actuated by the winding stem for the correction and is then capable of generating an impulse on the first hour wheel 2, at the moment of impact when the jumper 8 falls back on the star 6.
  • the second hour wheel 4 is driven by the first hour wheel 2 by the elastic coupling mechanism, which does not generate any shock between the jumper and the star, the leading mobile within the meaning of the invention then again becoming a driven mobile.
  • the jumper 8 and its spring are carried by the second hour wheel 4 and belong to the driving wheel and the star 6 is integral with the first hour wheel 2 and belongs to the driven wheel. But it is quite obvious that the jumper and its spring can be provided on the driven mobile and the star on the leading mobile.
  • the driving and driven moving parts are configured so that the ratio of the moment of inertia of the driven moving part to the moment of inertia of the driving moving part is greater than 0.9, so as to control the setting in motion of said moving part.
  • the plate of the second hour wheel 4 comprises various recesses 12 in the form here of three circular sectors and an oblong opening concentric with the axis of the second hour wheel 4 and distributed around the barrel of said second hour wheel 4. It is obvious that the recesses can have any other suitable shape and arrangement.
  • the second wheel of 4 hours is therefore lightened compared to a standard full board, so that the moment of inertia of the driving mobile is reduced to 288 mg * mm 2 while the driven mobile has a moment of inertia of 273 mg * mm 2 (for example by choosing for the first wheel of hours 2 a suitable material or a suitable embodiment to increase its moment of inertia compared to a standard wheel) so that the ratio of the moment d
  • the inertia of the driven part on the moment of inertia of the driving part is about 0.95.
  • any impulse of the jumper 8 carried by the second hour wheel 4, movable leading, on the star 6 integral with the first hour wheel 2, movable driven has a reduced effect due to the difference in inertia between the two driven and driving moving parts, reducing the risks of an unwanted setting in motion of the star 6, under the dynamic effect, during an impact between said star 6 and the jumper 8.
  • the effect of the jumper 8 carried by the second hour wheel 4 has no influence on the first hour wheel 2 integral with the star 6 and meshing with the timer gear.
  • the impulse delivered by the jumper 8 of the leading mobile, to the star 6 of the driven mobile is therefore not propagated to the rest of the time-setting mechanism, so that the minute hand is not subjected to shift.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
EP20207261.7A 2019-11-12 2020-11-12 Uhrwerkmechanismus, der eine mit einer angetriebenen feder zusammenwirkende treibende feder umfasst Pending EP3822711A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19208591 2019-11-12

Publications (1)

Publication Number Publication Date
EP3822711A1 true EP3822711A1 (de) 2021-05-19

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ID=68581251

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20207261.7A Pending EP3822711A1 (de) 2019-11-12 2020-11-12 Uhrwerkmechanismus, der eine mit einer angetriebenen feder zusammenwirkende treibende feder umfasst

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EP (1) EP3822711A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH263069A (fr) * 1944-03-22 1949-08-15 Jeanneret Abram Louis Echappement.
CH305463A (fr) * 1952-03-12 1955-02-28 Chs Tissot & Fils S A Montre à remontage automatique par les mouvements dans les deux sens de rotation d'une masse mobile.
CH337457A (fr) * 1957-03-16 1959-03-31 Martel Watch & Co S A Mécanisme de remontage automatique pour montre
FR2307301A1 (fr) * 1975-04-10 1976-11-05 Ebauches Sa Piece d'horlogerie comprenant un organe indicateur des heures actionnable manuellement independamment de l'organe indicateur des minutes
EP3336613A1 (de) * 2016-12-16 2018-06-20 Association Suisse pour la Recherche Horlogère Resonator für uhr, der zwei pendellager umfasst, die so angeordnet sind, dass sie auf derselben ebene schwingen können

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH263069A (fr) * 1944-03-22 1949-08-15 Jeanneret Abram Louis Echappement.
CH305463A (fr) * 1952-03-12 1955-02-28 Chs Tissot & Fils S A Montre à remontage automatique par les mouvements dans les deux sens de rotation d'une masse mobile.
CH337457A (fr) * 1957-03-16 1959-03-31 Martel Watch & Co S A Mécanisme de remontage automatique pour montre
FR2307301A1 (fr) * 1975-04-10 1976-11-05 Ebauches Sa Piece d'horlogerie comprenant un organe indicateur des heures actionnable manuellement independamment de l'organe indicateur des minutes
EP3336613A1 (de) * 2016-12-16 2018-06-20 Association Suisse pour la Recherche Horlogère Resonator für uhr, der zwei pendellager umfasst, die so angeordnet sind, dass sie auf derselben ebene schwingen können

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