EP3992727A1 - Mouvement d'horlogerie mecanique a detection de reserve de marche - Google Patents

Mouvement d'horlogerie mecanique a detection de reserve de marche Download PDF

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Publication number
EP3992727A1
EP3992727A1 EP20204874.0A EP20204874A EP3992727A1 EP 3992727 A1 EP3992727 A1 EP 3992727A1 EP 20204874 A EP20204874 A EP 20204874A EP 3992727 A1 EP3992727 A1 EP 3992727A1
Authority
EP
European Patent Office
Prior art keywords
lever
wheel
barrel system
power reserve
movement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20204874.0A
Other languages
German (de)
English (en)
French (fr)
Inventor
Stéphane BACHMANN
Julien Saglini
Laurent Klinger
Baptist Wyssbrod
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP20204874.0A priority Critical patent/EP3992727A1/fr
Priority to US17/381,425 priority patent/US11971687B2/en
Priority to JP2021128718A priority patent/JP7238045B2/ja
Priority to KR1020210105469A priority patent/KR102676395B1/ko
Priority to CN202111272979.4A priority patent/CN114442463B/zh
Publication of EP3992727A1 publication Critical patent/EP3992727A1/fr
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
    • G04B9/00—Supervision of the state of winding, e.g. indicating the amount of winding
    • G04B9/005—Supervision of the state of winding, e.g. indicating the amount of winding by optical indication of the amount of winding
    • 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
    • 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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/12—Driving mechanisms with mainspring with several mainsprings
    • 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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/16—Barrels; Arbors; Barrel axles
    • 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
    • G04B9/02—Devices controlled by such state, e.g. device affording protection means against overwinding

Definitions

  • the present invention relates to a mechanical timepiece movement provided with power reserve detection means.
  • a power reserve of a mechanical timepiece movement of a mechanical watch makes it possible to display to a person wearing the watch the operating time before the timepiece movement stops. It has been observed that the power reserve from one watch to another can vary substantially depending mainly on the manufacturing tolerances of the watch, wear, lubrication, roughness.
  • a mechanical timepiece movement generally comprises a barrel system driving at least one wheel at the load output and one wheel at the discharge output connected respectively to a load wheel and to an unload wheel of a differential.
  • a set of wheels linked to an intermediate wheel of the differential controls a power reserve display, but no element of the movement is provided for a movement blocking operation when the power reserve is at zero.
  • the patent EP 0 568 499 B1 describes a power reserve indicator device for a mechanical watch.
  • the indicator device comprises at least one star wheel with an indicator member, which is driven in rotation when the barrel is loaded or unloaded.
  • the indicator organ makes it possible to display the power reserve of the watch. However, nothing is provided to ensure that the movement is blocked when the power reserve approaches zero.
  • the patent CH 698 752 B1 describes a timepiece, which includes a mechanism for indicating the power reserve. It comprises two barrels facing each other and connected by a common shaft, which controls the power reserve display mechanism. However, nothing is provided to ensure that the movement is blocked when the power reserve approaches zero.
  • the patent application CH 710 320 A2 describes a timepiece, which comprises a source of mechanical energy, such as a barrel and a control member linked to a control device in the watch case.
  • the control device comprises a power reserve wheel pivotally mounted on the frame and connected to the barrel by a differential so that the angular position of the power reserve wheel is a function of the level of charge of the barrel.
  • a control cam is pivotally mounted on the same axis as the power reserve wheel.
  • the control cam has a slot extending in an arc of a circle in which is housed a pin integral with the power-reserve wheel.
  • a spiral spring is mounted between the power reserve wheel and the cam.
  • a stop device which comprises a stop rocker, to block the movement when the power reserve is close to zero.
  • the main object of the invention is therefore to overcome the drawbacks of the state of the art by proposing a mechanical watch movement provided with power reserve detection means and capable of directly blocking the operation of the movement, when the power reserve step is close to or equal to zero, using a minimum of components to obtain a compact system.
  • the present invention relates to a mechanical timepiece movement provided with power reserve detection means, which comprises the characteristics of independent claim 1.
  • An advantage of the mechanical timepiece movement with the power reserve detection means resides in the fact that an increase in the power reserve indication precision is achieved. This means that the power reserve detection means are made in such a way that the power reserve indication at zero corresponds to the actual stopping of the mechanical movement of the watch.
  • a control element which can be a wheel or a plate, is preferably linked directly to a wheel of an arrangement of drive wheels at the output of the differential to be driven in rotation or in a rectilinear direction.
  • a control element is preferably linked directly to a wheel of an arrangement of drive wheels at the output of the differential to be driven in rotation or in a rectilinear direction.
  • the power reserve detection means preferably comprise a control wheel and a rotatably mounted lever around a lever axis and cooperating with the control wheel so as to determine on the one hand that the barrel is completely charged, and on the other hand that the barrel is practically completely unloaded for the indication of the power reserve at zero.
  • the control wheel comprises an opening in the form of an arc of a circle of a determined angle and centered on the axis of the wheel
  • the control lever comprises a contact element, such as a rod or a pin or a blade inserted into the opening of the control wheel.
  • the axis of the wheel is arranged parallel to the central axis of the barrel system.
  • the opening of the control wheel comprises a first end for determining a 100% power reserve of the barrel and a second end for determining a 0% power reserve of the barrel system.
  • the first and second ends have circular portions.
  • the circular portions at the ends define half of a circle with a radius corresponding to half the width of the opening.
  • the power reserve is at 100%, i.e. the barrel system is fully charged, when the stem or the pin, or when a complementary stem or complementary pin which may be the central axis of the barrel between the rod or pin of the lever and the first end, comes into contact with the first end.
  • the power reserve is at zero when the rod or the pin or the blade of the lever comes into contact with the second end.
  • the lever pivots around its axis of rotation in such a way as to allow a blocking part of the lever to come and block any element of the movement causing the complete and instantaneous stoppage of the movement.
  • the lever comprises a blocking part at one end of the lever coming into contact by friction with a peripheral edge of the cage of the barrel system to block the watch movement.
  • the locking piece is at an opposite end to that of the contact element, which is the inserted rod or pin in the wheel opening.
  • the axis of rotation of the lever is close to the blocking part and arranged in such a way that in the blocking position, the rotation of the lever brings the blocking part against the peripheral edge of the barrel system.
  • the lever comprises a blocking part in the form of a tooth at one end of the lever to be inserted between two teeth of a toothed wheel on the periphery of the barrel system.
  • the blocking piece is at an end opposite that of the rod or the pin inserted in the opening of the wheel.
  • the axis of rotation of the lever is close to the rod where the pin of the lever is arranged in such a way that in the locking position, the rotation of the lever brings the tooth into the peripheral toothing of the barrel system.
  • the lever comprises a blocking piece at an end remote from the lever to come into contact with a rim of a spiral balance wheel as a mechanical oscillator.
  • the axis of rotation of the lever is at an end opposite to the locking piece, while the rod or the pin inserted in the opening of the wheel is in an intermediate position, but close to the axis of rotation of the lever.
  • the power reserve detection means may comprise a control element in the form of a plate, which comprises a rectilinear opening with a first end and a second end, and a control lever rotatably mounted with a rod or a pin at one end. end of the lever, and inserted into the straight opening.
  • the control element can be moved rectilinearly between guide portions by means of a toothed wheel at the barrel outlet meshing with a toothed rectilinear portion on one side of the control element.
  • the figures 1a, 1b and 1 C represent three-dimensional top views of some components of the mechanical timepiece movement 1 with the power reserve detection means 10, as well as a top plan view in the position of the power reserve means illustrated in figure 1b of a first embodiment.
  • the mechanical clock movement 1 for a watch is in the normal operating position in picture 1a and in the movement blocking position in figure 1b in power reserve equal to zero, as well as in figure 1c .
  • the mechanical timepiece movement 1 comprises at least the barrel system 2, which is arranged for example on one face of a watch plate of the movement (not shown) or of another support plate.
  • This barrel system 2 can be with a single barrel or with two barrels or more than two well-known barrels and having a charge output and a discharge output, as well as a differential to drive a base train of weather.
  • a barrel system 2 with differential can be used with a toothed wheel 24 peripheral to the cage of the barrel system 2 to drive at least one large middle wheel of the going train and/or a drive train starting from the axis or shaft 16 of the barrel system 2.
  • At least one drive wheel connected to the axis or central shaft 16 of the barrel system 2.
  • a first arrangement of drive wheels 7, 7' of which a base wheel 7 is fixed either to the cage of the barrel system 2 to rotate with the cage, or linked to the axle or shaft 16 of the barrel system 2.
  • the cage of the barrel system 2 rotates in the same direction as the axis or central shaft 16 of the barrel system 2.
  • the first arrangement of drive wheels 7, 7' and also a second arrangement of drive wheels 6, 6', 6" as a barrel system is used. 2 with differential
  • the first arrangement of drive wheels 7, 7' is linked to an unloading input of the differential, while the second arrangement of drive wheels 6, 6', 6" is linked to a load input of the differential.
  • the first arrangement of drive wheels 7, 7' comprises a first base wheel 7 fixed to the cage of the barrel system 2
  • the second arrangement of drive wheels 6, 6 ', 6" comprises a first base wheel 6 linked directly to the axis or to the central shaft 16 of the barrel system 2.
  • the power reserve detection means 10 of the mechanical timepiece movement 1 comprise a control element 3, which may be a control wheel as shown in this first embodiment, or also a control plate movable in a rectilinear direction.
  • the control wheel 3 is arranged facing the cage of the barrel system 2, and can be arranged to rotate around an axis of rotation 23 parallel to the central axis 16 of the barrel system 2.
  • a complementary member 8 under the form of a complementary wheel 8 in this case drives the control wheel 3 in a direction of charging or discharging the barrel system 2 in particular at the output of a differential.
  • the control wheel 3 comprises an opening 13 as a control portion, said opening 13 having a first end 21 to define a full load of the barrel system 2 and a second end 22 to define a discharge complete with the barrel system 2 for indicating the power reserve at zero.
  • the opening 13 is in the form of an arc of a circle of a determined angle and centered on the axis 23 of the control wheel 3 while being parallel to the axis or central shaft 16 of the barrel system 2.
  • the first end 21 of the opening 13 and the second end 22 of the opening 13 have the shape of circular portions. These circular portions at both ends define half of a circle with a radius corresponding to half the width of the opening 13.
  • the means 10 for detecting the power reserve of the mechanical timepiece movement 1 further comprise a lever 4, which can preferably be rotatably mounted about a lever axis 14 parallel to the axis of rotation 23 of the control wheel 3 and / or parallel to the central axis 16 of the barrel system 2.
  • the lever 4 comprises a contact element 5 arranged in the opening 13 of the control element 3, which is the control wheel 3 in this first form of execution, to come into contact with the second end 22 of the opening 13 during a power reserve indication at zero.
  • the lever 4 is pushed in rotation about its lever axis 14 by the second end 22 so that a blocking part 15 of the lever 4 comes into contact with the cage of the barrel system 2 is preferably in contact with an edge 12 of the cage of the barrel system 2.
  • the axis of rotation 14 of the lever is arranged close to the blocking part 15 which can be a wedge or a stud fixed under a surface of the lever 4 or coming directly from the material with the lever 4 in general.
  • the wedge or stud normally does not include any ribs on its periphery in order to bear only against the edge 12 of the barrel system 2 in order to block the movement by friction.
  • the lever 4 can be movable in rotation or in a rectilinear manner.
  • the lever 4 can comprise a contact element 5, which is arranged facing a control portion 13 of the control element 3 or in a control portion 13 of the control element 3.
  • the control element 3 can be a wheel with a control portion in the form of a cam with a blocking member on the cam defining a zero power reserve.
  • the contact element 5 in the form of a feeler or a wedge comes into direct contact with the blocking member when the power reserve is at zero to block the movement by the blocking part 15 of the lever 4.
  • the first arrangement of drive wheels further comprises a second wheel 7' mounted coaxially on the axis of the complementary member 8 in the form of a wheel, and a first wheel 7 for rotating the second wheel 7', said first wheel 7 being fixed on the cage of the barrel system 2 at the level of the central axis 16 of the barrel system 2.
  • the first wheel 7 is crossed by the axis or central shaft 16 of the barrel system 2.
  • Both wheels 7, 7' and the complementary wheel 8 are toothed wheels to allow at least the first wheel 7 to drive said second wheel 7' by gearing.
  • the contact between the second wheel 7' and the complementary wheel 8, as well as the contact between the third wheel 6" and the complementary wheel 8 passes through balls. There is a differential effect between the second wheel 7' and the third wheel 6" by sandwich contact of said balls.
  • the complementary toothed wheel 8 meshes with the control wheel 3 which comprises a toothing on the periphery.
  • the second arrangement of drive wheels 6, 6', 6" for the load of the barrel system 2 comprises a first wheel 6 directly linked to the axis or central shaft 16 of the barrel system 2.
  • This first toothed wheel 6 meshes with a second toothed wheel 6' arranged in the same plane as the first wheel 6 and rotating around an axis of rotation 18.
  • This second toothed wheel 6' is also provided to mesh with a third wheel 6" arranged between the complementary wheel 8 and the second wheel 7' of the first drive wheel arrangement and coaxially.
  • the complementary wheel 8 will turn in one direction or in another direction.
  • the wheel arrangements described above make it possible to connect the charging and discharging of the barrel system 2, as as an energy reservoir, to the display of the power reserve indication.
  • the second arrangement of drive wheels 6, 6', 6" transmits with a good transmission ratio the load of the barrel system 2 (winding), whereas the first arrangement of drive wheels 7, 7' transmits with the good transmission ratio the discharge of the barrel system 2 (normal discharge during operation)
  • the differential is designed to average these two pieces of information and transmit them to the display.
  • first end 21 of the opening 13 corresponding to the complete load of the barrel system 2 comes into contact either with the contact element 5 of the lever 4 or in this case with a part linked to the central axis 16 of the barrel system 2.
  • FIGS. 2a, 2b and 2c represent two three-dimensional views from above and a top view of the position shown in figure 2b of a second simplified embodiment of the mechanical timepiece movement fitted with power reserve detection means according to the invention.
  • the essential difference is at the level of the blocking part 15 of the lever 4 which is a tooth capable of coming into the teeth of a peripheral toothed wheel 24 of the cage of the barrel system 2 like the power reserve is at zero to block the movement.
  • the third embodiment shown in figures 3a, 3b and 3c differ from the other two forms of execution, because it is not a blocking at the level of the cage of the barrel system which takes place when the power reserve is at zero, but a blocking of a serge 30 of a mechanical oscillator. However, the blocking of the movement takes place from the same way as the embodiments described above by the blocking piece 15 in contact with the rim 30. The entire description of these elements will therefore not be repeated.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Retarders (AREA)
  • Motorcycle And Bicycle Frame (AREA)
EP20204874.0A 2020-10-30 2020-10-30 Mouvement d'horlogerie mecanique a detection de reserve de marche Pending EP3992727A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP20204874.0A EP3992727A1 (fr) 2020-10-30 2020-10-30 Mouvement d'horlogerie mecanique a detection de reserve de marche
US17/381,425 US11971687B2 (en) 2020-10-30 2021-07-21 Mechanical horological movement with power reserve detection
JP2021128718A JP7238045B2 (ja) 2020-10-30 2021-08-05 パワーリザーブ検出器を有する機械式測時器ムーブメント
KR1020210105469A KR102676395B1 (ko) 2020-10-30 2021-08-10 예비 전력 검출부를 가진 기계적 시측 무브먼트
CN202111272979.4A CN114442463B (zh) 2020-10-30 2021-10-29 带有动力储备检测的机械钟表机芯

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20204874.0A EP3992727A1 (fr) 2020-10-30 2020-10-30 Mouvement d'horlogerie mecanique a detection de reserve de marche

Publications (1)

Publication Number Publication Date
EP3992727A1 true EP3992727A1 (fr) 2022-05-04

Family

ID=73040001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20204874.0A Pending EP3992727A1 (fr) 2020-10-30 2020-10-30 Mouvement d'horlogerie mecanique a detection de reserve de marche

Country Status (4)

Country Link
US (1) US11971687B2 (zh)
EP (1) EP3992727A1 (zh)
JP (1) JP7238045B2 (zh)
CN (1) CN114442463B (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0568499B1 (fr) 1992-04-29 1997-05-21 Exidel Sa Dispositif indicateur de réserve de marche pour montre
CH698752B1 (fr) 2004-11-10 2009-10-15 Frank Mueller Watchland S A Pièce d'horlogerie avec mécanisme d'indication de la réserve de marche.
CH710320A2 (fr) 2014-10-31 2016-05-13 Le Cercle Des Horlogers Sa Piece d'horlogerie comportant une source d'énergie mécanique et un organe de commande.
EP3306415A1 (fr) * 2016-10-04 2018-04-11 ETA SA Manufacture Horlogère Suisse Mouvement d'horlogerie mecanique a detection de reserve de marche
CH713036A2 (fr) * 2016-10-04 2018-04-13 Eta Sa Mft Horlogere Suisse Mouvement d'horlogerie mécanique assurant un blocage du mouvement quand la réserve de marche est à zéro.
EP3333637A1 (fr) * 2016-12-12 2018-06-13 ETA SA Manufacture Horlogère Suisse Mouvement d'horlogerie mecanique a detection de reserve de marche

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1970778B1 (fr) * 2007-03-13 2009-09-16 Montres Breguet S.A. Pièce d'horlogerie comprenant un dispositif indicateur de réserve de marche
JP5320368B2 (ja) 2010-10-01 2013-10-23 セイコークロック株式会社 時計
JP5320370B2 (ja) 2010-10-07 2013-10-23 セイコークロック株式会社 歯車機構及び時計
EP3306416B1 (fr) * 2016-10-04 2019-08-21 ETA SA Manufacture Horlogère Suisse Mouvement d'horlogerie mécanique à détection de réserve de marche

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0568499B1 (fr) 1992-04-29 1997-05-21 Exidel Sa Dispositif indicateur de réserve de marche pour montre
CH698752B1 (fr) 2004-11-10 2009-10-15 Frank Mueller Watchland S A Pièce d'horlogerie avec mécanisme d'indication de la réserve de marche.
CH710320A2 (fr) 2014-10-31 2016-05-13 Le Cercle Des Horlogers Sa Piece d'horlogerie comportant une source d'énergie mécanique et un organe de commande.
EP3306415A1 (fr) * 2016-10-04 2018-04-11 ETA SA Manufacture Horlogère Suisse Mouvement d'horlogerie mecanique a detection de reserve de marche
CH713036A2 (fr) * 2016-10-04 2018-04-13 Eta Sa Mft Horlogere Suisse Mouvement d'horlogerie mécanique assurant un blocage du mouvement quand la réserve de marche est à zéro.
EP3333637A1 (fr) * 2016-12-12 2018-06-13 ETA SA Manufacture Horlogère Suisse Mouvement d'horlogerie mecanique a detection de reserve de marche

Also Published As

Publication number Publication date
US11971687B2 (en) 2024-04-30
KR20220058402A (ko) 2022-05-09
CN114442463A (zh) 2022-05-06
JP2022073941A (ja) 2022-05-17
JP7238045B2 (ja) 2023-03-13
CN114442463B (zh) 2024-02-06
US20220137558A1 (en) 2022-05-05

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