EP3872576B1 - Federgehäuse eines uhrwerks mit verdrehter welle - Google Patents

Federgehäuse eines uhrwerks mit verdrehter welle Download PDF

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Publication number
EP3872576B1
EP3872576B1 EP20159421.5A EP20159421A EP3872576B1 EP 3872576 B1 EP3872576 B1 EP 3872576B1 EP 20159421 A EP20159421 A EP 20159421A EP 3872576 B1 EP3872576 B1 EP 3872576B1
Authority
EP
European Patent Office
Prior art keywords
barrel
ratchet
drum
shaft
arbour
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.)
Active
Application number
EP20159421.5A
Other languages
English (en)
French (fr)
Other versions
EP3872576A1 (de
Inventor
Julien Christan
Laurent Kaelin
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 EP20159421.5A priority Critical patent/EP3872576B1/de
Priority to US17/166,545 priority patent/US11782386B2/en
Priority to JP2021018918A priority patent/JP7116815B2/ja
Priority to CN202110210265.4A priority patent/CN113376994B/zh
Publication of EP3872576A1 publication Critical patent/EP3872576A1/de
Application granted granted Critical
Publication of EP3872576B1 publication Critical patent/EP3872576B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/16—Barrels; Arbors; Barrel axles

Definitions

  • the invention relates to a barrel with a twisted shaft for a mechanical watch movement.
  • the invention also relates to a watch movement comprising at least one such barrel with a twisted shaft.
  • the invention also relates to a timepiece comprising such a clock movement.
  • the invention relates to the field of watchmaking, and more particularly to the field of energy storage barrels, for powering a movement, a strike, or even another functionality of a part. watchmaking.
  • a ratchet is mounted axially on one end of a barrel shaft, said end emerging from the barrel drum.
  • the outgoing end has a square section, cooperating complementary in nesting within a housing of the same section provided in the center of said ratchet, for its drive.
  • the opposite end of the barrel shaft is mounted axially free to rotate relative to a barrel drum.
  • the latter internally receives a barrel spring, in the form of an elastically shaped blade, one end of which locks against a clearance made in the interior wall of said drum, while the opposite end of said spring is fixed on the shaft , via a hook, in particular provided on an integral drain of said tree.
  • a barrel spring in the form of an elastically shaped blade, one end of which locks against a clearance made in the interior wall of said drum, while the opposite end of said spring is fixed on the shaft , via a hook, in particular provided on an integral drain of said tree.
  • the ratchet is locked on the shaft by screwing resting on a shoulder provided projecting on said shaft, beyond the square section of the outgoing end. Further forward, an axial screw is screwed into a complementary tapped hole within said outgoing end.
  • This type of mounting by screwing firstly imposes a dimensioning constraint on the diameter of the shaft, the outgoing end of which is intended to receive the screw.
  • This dimensioning impacts the space available in the drum for the spring and limits the number of windings of said spring, namely the power reserve of the timepiece.
  • the invention aims to keep a ratchet locked on a shaft of a barrel, without having to be fixed by screwing, while avoiding the risk of the ratchet springing out from the spring.
  • the barrel is remarkable in that said outgoing end of the shaft has a twisted shape around its axis.
  • the invention envisages an outgoing end of said shaft which is provided twisted or twisted, imposing a rotation in one direction of the ratchet during its introduction onto said shaft from the distal point of the outgoing end up to the locking position against the bung of said shaft, and in the opposite direction of rotation during its extraction.
  • the torque provided by the compression of the barrel spring is sufficient to prevent the ratchet from rotating relative to said shaft in said opposite direction of extraction, and consequently also prevents it from going up along of the square section of the twisted shaft.
  • the shaft can be narrower.
  • the invention makes it possible to reduce the diameter of the bung, thus making it possible to accommodate a longer spring in the barrel drum, increasing the number of turns around the bung and thus the power reserve of the barrel.
  • the shaft according to the invention also saves time, because it is no longer necessary to unscrew a screw to remove the ratchet.
  • the ratchet can be removed directly without any prior steps, apart from that concerning the ratchet.
  • the outgoing end of the shaft is twisted in the opposite direction to the torque applied to said shaft by the spring in compression.
  • the torque is exerted in a clockwise direction on the bung of the shaft, then the outgoing end of said shaft is twisted in the opposite direction, from the bung towards said distal end, and vice versa.
  • said outgoing end is of polygonal section, the opening of the ratchet having a corresponding shape.
  • said outgoing end is of square section.
  • the outgoing end has chamfered edges.
  • said outgoing end comprises a distal face angularly offset relative to its base of the barrel.
  • the offset is at least 30 degrees.
  • said barrel comprises a bung surrounding said shaft, the bung being arranged in the housing.
  • the spring is held in the housing, on the one hand on an internal peripheral face of the barrel, and on the other hand on the bung of the shaft.
  • the shaft passes through the housing and is mounted in free rotation relative to said barrel drum.
  • a pawl cooperating directly or indirectly with teeth arranged on the external peripheral face of the drum, so as to prevent it from rotating in the opposite direction to the first direction.
  • the invention also relates to a watch movement comprising such a barrel.
  • the invention also relates to a timepiece comprising such a clock movement.
  • the present invention relates to a barrel 1 with a twisted shaft 4, as shown in figures 1 and 2 .
  • the barrel 1 comprises a barrel drum 2 of cylindrical shape.
  • the drum 2 comprises an upper face 5 and a lower face 8 in the form of discs, as well as a rounded peripheral face 6.
  • the drum 2 is provided with a housing delimited by the upper 5, lower 8 and peripheral 6 faces.
  • the peripheral face 6 of the drum 2 is provided with gear teeth 7 at the junction of the upper face 5. These teeth 7 make it possible to transmit the torque of the spring to the rest of the movement, in particular to actuate the movement of the hands.
  • the barrel 1 includes a shaft 4 passing through the housing.
  • the shaft 4 extends around a main longitudinal axis around which it can rotate.
  • the shaft 4 is provided with an outgoing end 9 of said drum 2.
  • the barrel 1 comprises a spring, not shown in the figures, the spring being arranged in the housing of the barrel drum 2.
  • the spring is spiral shaped.
  • the spring is held in the housing, on the one hand at the internal peripheral face 6 of the barrel, and on the other hand at the shaft 4.
  • the spring is compressed by rotation of said shaft 4 in a first direction of rotation 12 .
  • the barrel 1 is provided with a ratchet 3 arranged on the drum 2.
  • the ratchet 3 rests on the upper face 5 of the barrel drum 2.
  • Most of the outgoing end 9 protrudes beyond the ratchet 3.
  • the ratchet 3 is a flat disc provided with peripheral gear teeth 13.
  • the ratchet 3 is configured to allow the rotation of the shaft 4 in the first direction of rotation 12.
  • the ratchet 3 comprises an opening 14 cooperating in nesting on the outgoing end 9 of the shaft 4, the outgoing end 9 passing through the ratchet 3. In a movement, the ratchet 3 is for example blocked in the other direction by a pawl, not shown in the figures.
  • the pawl does not prevent the ratchet from rotating in the first direction 12.
  • the shaft 4 turns in the first direction 12 and compresses the spiral spring inside the drum housing 3. But the ratchet 3 is blocked in the other direction so that the spring remains compressed.
  • the force exerted by the spring causes the barrel 2 to rotate to activate the mechanism of the clock movement, and not the shaft 4.
  • said outgoing end 9 of the shaft 4 has a twisted shape around its axis.
  • the outgoing end 9 is twisted in the opposite direction to said first direction 12 relative to the drum 2.
  • Said outgoing end 9 is of polygonal section, the opening 14 of the ratchet 3 having a corresponding shape.
  • Said outgoing end 9 is of square section in the figures.
  • the edges of said outgoing end 9 are chamfered.
  • Said outgoing end 9 comprises a distal face 16 angularly offset relative to its base at the height of the barrel 1. The offset is preferably at least 30 degrees, or even 45 degrees.
  • the ratchet 3 is raised along the outgoing end 9 by rotating it through an angle corresponding to that of the spin of the shaft 4. To this, the ratchet 3 rotates in the direction 15 of the twist of the outgoing end 9.
  • the position of the opening 14 always corresponds to the shape of the section of the outgoing end 9, the ratchet 3 being able to slide along the outgoing end 9.
  • FIG. 3 shows the shaft 4 provided with the outgoing end 9 and the upper face 16.
  • the shaft 4 further comprises a bung 11 surrounding said shaft, the bung 11 being arranged in the housing.
  • the spring is held at the bung 11 of the shaft 4.
  • the spring applies a force on the shaft 4 through the bung 11, the shaft 4 transmitting the force to the ratchet 3, which is blocked by the pawl.
  • the ratchet 3 does not risk sliding along the outgoing end, because the force is applied in the opposite direction 12 to the direction 15 of the twist.
  • the present invention also relates to a watch movement 10 comprising a barrel as described above.
  • FIG. 4 shows part 10 of an automatic winding movement comprising the barrel 1 according to the invention.
  • This part 10 comprises a plate 17 of the movement, an oscillating mass 18, a barrel bridge 19, a bridge 21 of the automatic winding system, gears 22 of the needle display system of the timepiece.
  • the plate 17 and the two bridges 19, 21 are substantially parallel. From bottom to top, we find the plate 17, the barrel bridge 19, the bridge 21 of the automatic winding system and the oscillating weight 18.
  • the gears 22 are arranged next to the barrel bridge 19, under the bridge 21 of the system automatic winding.
  • the barrel 1 is mounted between the plate 17 and the barrel bridge 19. To this end, the outgoing end 9 of the shaft 4 passes through the barrel bridge 19 and the ratchet 3, the ratchet 3 being arranged on the barrel bridge 19, below the bridge of the automatic winding system 21.
  • the other free end 23 of the shaft is assembled to the plate 17 while being free to rotate around its axis relative to the latter.
  • the 20 movement is similar, but does not have an automatic winding system.
  • the ratchet 3 is engaged with a crown wheel 25, which can be operated from the outer crown of the timepiece, the crown not being shown in the figures.
  • the crown wheel 25 meshes with the ratchet 3, which rotates the shaft of the barrel 4 to force the spring inside the drum 2, and raise the spring.
  • the ratchet locking pawl 26 is arranged on the crown wheel 25 instead of the ratchet 3 directly. The pawl 26 makes it possible to rotate the crown wheel 25 in only one direction, the direction allowing the spring to be raised.
  • the invention also relates to a timepiece, not shown in the figures, comprising such a clockwork movement.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Transmission Devices (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Claims (13)

  1. Federgehäuse (1) mit verdrillter Welle, die mindestens Folgendes umfasst
    - eine Trommel (2) des Federgehäuses, die mit einem Gehäuse versehen ist,
    - eine Feder, die im Gehäuse der Trommel (2) des Federgehäuses angeordnet ist,
    - eine Welle (4), die zumindest teilweise durch das Gehäuse verläuft, wobei die Feder durch Drehen der Welle in einer ersten Drehrichtung (12) zusammengedrückt wird, wobei die Welle (4) mit einem austretenden Ende (9) der Trommel (2) versehen ist,
    - eine an der Trommel (2) angeordnete Ratsche (3), wobei die Ratsche (3) so konfiguriert ist, dass sie die Drehung der Welle (4) in der ersten Drehrichtung (12) ermöglicht, wobei das austretende Ende (9) die Ratsche (3) durch eine Öffnung (14) durchquert, die mit dem austretenden Ende (9) ineinandergreifend zusammenwirkt,
    dadurch gekennzeichnet, dass das austretende Ende (9) der Welle (4) eine um seine Achse verdrehte Form hat.
  2. Federgehäuse nach Anspruch 1, dadurch gekennzeichnet, dass das austretende Ende (9) in entgegengesetzter Richtung (15) zu der ersten Richtung (12) in Bezug auf die Trommel (2) verdreht ist.
  3. Federgehäuse nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das austretende Ende (9) einen polygonalen Querschnitt hat, wobei die Öffnung (14) der Ratsche (3) eine entsprechende Form hat.
  4. Federgehäuse nach Anspruch 3, dadurch gekennzeichnet, dass das austretende Ende (9) einen quadratischen Querschnitt hat.
  5. Federgehäuse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das austretende Ende (9) abgeschrägte Kanten aufweist.
  6. Federgehäuse nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das austretende Ende (9) eine distale Fläche (16) umfasst, die winkelmäßig von ihrer Basis am Federgehäuse (2) versetzt ist.
  7. Federgehäuse nach Anspruch 6, dadurch gekennzeichnet, dass der Versatz mindestens 30 Grad beträgt.
  8. Federgehäuse nach einem der vorhergehenden Ansprüche und mit einem Spund (11), der die Welle (4) umgibt, wobei der Spund (11) in dem Gehäuse angeordnet ist.
  9. Federgehäuse nach dem vorhergehenden Anspruch, bei dem die Feder in dem Gehäuse gehalten wird, einerseits an einer inneren Umfangsfläche (6) des Federgehäuses und andererseits am Spund (11) der Welle (4).
  10. Federgehäuse nach einem der vorhergehenden Ansprüche, wobei die Welle (4) durch das Gehäuse verläuft und in Bezug auf die Trommel (2) des Federgehäuses frei drehbar gelagert ist.
  11. Anordnung mit einem Federgehäuse nach einem der vorhergehenden Ansprüche und einem Sperrkegel (26), die direkt oder indirekt mit peripheren Getriebezähnen (13) der Ratsche (3) zusammenwirkt, um sie daran zu hindern, sich in die entgegengesetzte Richtung (15) der ersten Richtung (12) zu drehen.
  12. Uhrwerk (10, 20) mit einem Federgehäuse (1) nach einem der vorhergehenden Ansprüche.
  13. Uhr, umfassend ein Uhrwerk (10, 20) nach dem vorhergehenden Anspruch.
EP20159421.5A 2020-02-25 2020-02-25 Federgehäuse eines uhrwerks mit verdrehter welle Active EP3872576B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20159421.5A EP3872576B1 (de) 2020-02-25 2020-02-25 Federgehäuse eines uhrwerks mit verdrehter welle
US17/166,545 US11782386B2 (en) 2020-02-25 2021-02-03 Timepiece barrel with a twisted arbour
JP2021018918A JP7116815B2 (ja) 2020-02-25 2021-02-09 ねじれたアーバーを備える計時器用バレル
CN202110210265.4A CN113376994B (zh) 2020-02-25 2021-02-25 带有扭转条轴的时计发条盒

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20159421.5A EP3872576B1 (de) 2020-02-25 2020-02-25 Federgehäuse eines uhrwerks mit verdrehter welle

Publications (2)

Publication Number Publication Date
EP3872576A1 EP3872576A1 (de) 2021-09-01
EP3872576B1 true EP3872576B1 (de) 2024-02-21

Family

ID=69740174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20159421.5A Active EP3872576B1 (de) 2020-02-25 2020-02-25 Federgehäuse eines uhrwerks mit verdrehter welle

Country Status (4)

Country Link
US (1) US11782386B2 (de)
EP (1) EP3872576B1 (de)
JP (1) JP7116815B2 (de)
CN (1) CN113376994B (de)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59595Y2 (ja) * 1976-02-27 1984-01-09 東芝医療用品株式会社 紫外線インジケ−タ
JP2005156344A (ja) 2003-11-26 2005-06-16 Seiko Epson Corp ぜんまい装置、およびこれを備えた時計
JP2008196549A (ja) 2007-02-09 2008-08-28 Toyoda Gosei Co Ltd 取付構造体
CH700058B1 (fr) * 2008-12-15 2013-09-13 Francois Durafourg Ensemble comprenant un rochet de remontoir fixé sur un arbre de barillet et arbre de barillet destiné à cet ensemble.
KR101432480B1 (ko) * 2011-04-15 2014-08-21 (주)백산오피씨 감광 드럼용 구동 결합체, 감광 드럼 조립체, 프로세스 카트리지, 및 이미지 생성장치
EP2570862B1 (de) 2011-09-15 2014-03-05 ETA SA Manufacture Horlogère Suisse Uhren-Federgehäusebaugruppe mit reduziertem Bunddurchmesser
EP2657794B1 (de) * 2012-04-25 2017-02-01 ETA SA Manufacture Horlogère Suisse Federwelle und Zugfeder
EP2746868B1 (de) * 2012-12-18 2016-04-27 ETA SA Manufacture Horlogère Suisse Federgehäuse einer Uhr
JP6874341B2 (ja) * 2016-11-22 2021-05-19 セイコーエプソン株式会社 時計用駆動機構、機械式時計およびゼンマイの操作方法
CH713951B1 (fr) * 2017-07-03 2021-03-31 Eta Sa Mft Horlogere Suisse Barillet d'horlogerie à diamètre de bonde réduit.
JP6653731B2 (ja) 2018-06-13 2020-02-26 セイコーインスツル株式会社 香箱アセンブリ、ムーブメント及び時計

Also Published As

Publication number Publication date
CN113376994B (zh) 2022-12-09
US20210263471A1 (en) 2021-08-26
CN113376994A (zh) 2021-09-10
JP7116815B2 (ja) 2022-08-10
JP2021135291A (ja) 2021-09-13
EP3872576A1 (de) 2021-09-01
US11782386B2 (en) 2023-10-10

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