EP4332687B1 - Spiralfeder einer unruh-spiralfeder einer mechanischen uhr - Google Patents

Spiralfeder einer unruh-spiralfeder einer mechanischen uhr

Info

Publication number
EP4332687B1
EP4332687B1 EP23190159.6A EP23190159A EP4332687B1 EP 4332687 B1 EP4332687 B1 EP 4332687B1 EP 23190159 A EP23190159 A EP 23190159A EP 4332687 B1 EP4332687 B1 EP 4332687B1
Authority
EP
European Patent Office
Prior art keywords
balance spring
stud
balance
horology
coils
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
EP23190159.6A
Other languages
English (en)
French (fr)
Other versions
EP4332687A1 (de
Inventor
Julien Christan
Raphaël Courvoisier
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
Publication of EP4332687A1 publication Critical patent/EP4332687A1/de
Application granted granted Critical
Publication of EP4332687B1 publication Critical patent/EP4332687B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/066—Manufacture of the spiral spring
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G04B17/325—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring in a fixed position, e.g. using a block
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G04B17/34—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring onto the balance
    • 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
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/02—Regulator or adjustment devices; Indexing devices, e.g. raquettes
    • 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
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/04—Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat
    • G04B18/06—Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat by setting the collet or the stud of a hairspring

Definitions

  • the present invention relates to a balance spring for a balance wheel and hairspring assembly of a watch movement.
  • the present invention also relates to a watch assembly comprising a balance spring and a stud.
  • a balance spring In watchmaking, a balance spring, combined with a balance wheel, forms a regulating organ commonly called a balance spring assembly for mechanical timepieces.
  • the balance spring is a very thin spring that winds itself in concentric coils when no force is applied.
  • one end of the balance spring In its assembled state, one end of the balance spring, called the innermost coil, is attached to a ferrule fitted onto a balance wheel pivot, and the other end, called the outermost coil, is attached to a stud, which is typically secured by means of a stud holder in the balance bridge, also known as the balance cock.
  • the timekeeping mechanism for mechanical timepieces also called the oscillating system, comprises a balance wheel and hairspring assembly and an escapement.
  • the balance wheel consists of a balance staff pivoted between a first and second bearing and connected to a balance rim by means of radial arms.
  • the hairspring is attached via its first inner coil to the balance staff, for example by means of a ferrule, and via its outer outer coil to a fixed attachment point such as a stud mounted on a stud holder.
  • the escapement in a very common embodiment, it comprises a double-plate system consisting of a large plate that carries a plate pin and a small plate in which is A notch is cut into the escapement.
  • the escapement also includes an anchor, the stem of which is pivoted between a first and a second bearing.
  • the anchor consists of a rod connecting a fork to an entry arm and an exit arm.
  • the fork comprises an entry horn and an exit horn, between which extends a dart.
  • the fork's travel is limited by an entry limiting pin and an exit limiting pin, which may be made as a single unit with an anchor bridge.
  • the entry arm and exit arm each carry an entry pallet and an exit pallet, respectively.
  • the anchor cooperates with an escape wheel comprising an escape wheel axle pivoted between a first and a second bearing.
  • a balance spring is a spring that, as its name suggests, takes the form of a spiral when at rest. Winded in a horizontal plane, parallel to the plane of the clockwork mechanism, the balance spring serves only one function: to make the balance wheel oscillate around its equilibrium position, also called the dead center, at the most constant frequency possible. When the balance wheel leaves its equilibrium position by pivoting in a given direction, it tensions the balance spring. This creates a restoring torque in the balance spring, which causes the balance wheel to return to its equilibrium position. During this oscillation, the balance spring relaxes.
  • the balance wheel since the balance wheel has acquired a certain speed, and therefore kinetic energy, it overshoots its equilibrium position in the opposite direction, which tensions the balance spring again until the restoring torque it exerts on the balance wheel stops it once more and forces it to rotate in the other direction.
  • the balance spring therefore expands and contracts alternately: it is said to "breathe.”
  • many factors contribute to preventing a balance spring from developing isochronously during the expansion and contraction phases.
  • the balance spring must resist oxidation and magnetism, which cause the coils to stick together and tend to stop the watch.
  • the influence of atmospheric pressure is minimal. For a long time, it was the Temperature was the crux of the problem, as heat expands the metal while cold shrinks it.
  • the balance spring must also be elastic, able to deform yet always return to its original shape.
  • balance springs The material used for making balance springs is usually steel. Being ductile, such steels must be corrosion-resistant. Recent developments also propose making balance springs from silicon. Silicon balance springs, particularly because they are insensitive to magnetism, are more precise than their steel predecessors. However, their production cost is higher and, being fragile, they are more difficult to assemble.
  • a balance spring must be isochronous. No matter how far the spring rotates, it must always take the same amount of time to oscillate. If the spring contracts by only a few degrees, it accumulates little energy and slowly returns to its equilibrium position. If the spring is displaced significantly from its equilibrium position, it moves very quickly in the opposite direction. The important thing is that these two movements occur in the same amount of time. The underlying idea is that the energy available to the balance spring is not constant, and yet it must function regardless of whether the watch is fully wound or running on its last few hours of power reserve.
  • balance springs Due to their small size, balance springs are difficult to assemble. However, the way in which the two ends of a balance spring are secured also greatly influences the accuracy of the watch movement. In most mechanical watch movements, the two ends of the balance spring are inserted into a drilled section and held in place by a pin that is manually pressed in using pliers. This can result in a slight rotation of the balance spring, which is detrimental to the movement's accuracy.
  • Another technique involves fixing the ends of the spirals with glue.
  • this technique has also shown its limitations. It has been observed that, due to its viscosity, the glue exerts Capillary action exerts a tensile force on the spiral, which can press its ends against the walls of the pin in which they are engaged. The resulting deformation of the spiral induces mechanical stresses that are detrimental to the regularity of its movement.
  • CH708429 a flat spiral intended to be mounted on the balance staff of a mechanical watch regulator, the spiral comprising several internal coils for which the distance between each point and the center of rotation of the spiral varies linearly according to the angular position of this point when the spiral is at rest.
  • CH708429 The spiral is composed of regularly concentric turns in its free state.
  • the teaching of CH708429 The modification is limited to the outermost coil, giving it a non-linear shape to reduce imbalance and improve isochronism.
  • the document CH714 775 discloses a spiral-pin assembly designed to ensure the reliable attachment of the last coil to the pin.
  • the present invention aims to remedy the problems mentioned above and others by providing a spiral whose last outer coil can be reliably fixed to a stud without the use of glue or pins or operations such as pinching, crimping or others.
  • the present invention relates to a watch assembly consisting of a spiral and a stud for a balance wheel-spiral assembly of a mechanical watch movement as defined by claim 1 of the patent.
  • the present invention also relates to a watch assembly consisting of a balance spring and a stud for a balance wheel and balance spring assembly of a mechanical watch movement.
  • the balance spring is formed of a succession of coils extending between a first free end, called the first inner coil, and a second free end, called the last outer coil.
  • the coils of the balance spring are arranged off-center when it is in its free state, that is, a position in which the distance between the second and third coils is not the same as the distance between the first and third coils.
  • the stud comprising a base in which a clearance is provided in which the stopping means is received, the coils being rearranged concentrically when this spiral is in the mounted state in the balance-spiral assembly mounted in the mechanical watch movement, the fixing of the spiral on the stud inducing in the coils of the spiral an elastic stress by means of which the stopping means is engaged in a non-losable way in the clearance of the stud.
  • the stopping means is shaped like a hook.
  • the hook is shaped in a T, an L, a U or in the shape of a marine anchor.
  • the spiral is made of silicon, for example by plasma cutting of a silicon plate.
  • the attachment of the balance spring according to the invention requires a simple operation of engaging the free end of its last coil outside into the recess provided in the stud. This minimizes any assembly operations, thereby reducing assembly and production time and consequently lowering costs. Likewise, strictly limiting assembly operations also ensures excellent reproducibility of the operation of balance-spring assemblies incorporating a balance spring according to the invention.
  • the coils S1, ..., Sn-1 of the balance spring 1 are arranged off-center when the balance spring 1 is in its concentric state, and rearrange themselves concentrically when the balance spring is mounted in the balance-spring assembly, this assembly being at rest.
  • the fixing of the stopping means on the stud is done under stress, this stress inducing in the balance spring a mechanical tension which will simultaneously guarantee the locking of the last coil outside the balance spring on the stud and the chronometric performance of the regulating assembly by concentric rearrangement of the coils of the balance spring.
  • the present invention proceeds from the general inventive idea of providing a spiral which, in its unmounted state, when no stress other than the force of gravity is acting upon it, has its turns off-center, such that the space between two consecutive turns and the two following turns is not the same as one moves away from the center of the spiral, represented by its first inner turn.
  • the spiral according to the invention is arranged so that, when it is fixed to the pin by the free end of its outermost outer turn, its turns become centered, so that its turns extend concentrically.
  • the transition of the balance spring from its free state, in which its coils are off-center, to its fixed state on the stud, in which its coils are centered causes its coils to be placed under elastic tension.
  • the retaining means provided at the free end of its outermost coil becomes permanently engaged in the recess in the stud.
  • the balance spring is thus fixed according to the invention without the need for... no glue or specific tools are required. This fastening is therefore simpler, faster, and more reliable than with prior art balance springs.
  • the fixation of the balance spring according to the invention onto its stud requires virtually no assembly operations other than sliding the retaining means into the stud's recess, the operation of the resulting balance spring assemblies depends less on the skill of the operators or the proper calibration of the machines used for fixing the balance springs and is therefore much more reproducible.
  • FIG. 1 Designated as a whole by the general numerical reference 1, this spiral comprises a plurality of turns S1, S2,..., Sn extending between a first inner turn 2 located at the center 4 of the spiral 1, and a final outer turn 6 located outside the spiral 1.
  • Spiral 1 is in a free state in which no constraints are exerted upon it, except for the force of Earth's gravity. In this free state, spiral 1 is in a rest position in which its turns S1,..., Sn are off-center, that is, a position in which the distance R2,3 separating the second turn S2 from the third turn S3 is not the same as the distance R1,2 separating the first turn S1 from the second turn S2.
  • the outermost coil 6 terminates in a stopper made in one piece with the spiral 1.
  • This stopper takes the form of a hook 8, for example, in the shape of a "T", comprising a foot 10 and a head 12 perpendicular to each other.
  • the foot 10 and the head 12 of the hook 8 are each formed from a bar with the same cross-section as the coils S1,..., Sn of the spiral 1.
  • the hook 8 may have a different cross-section than the coils S1,..., Sn of the spiral 1. It may even be possible to vary locally the section of the hook 8 in order to adapt the mechanical stiffness of the different elements that compose the hook 8 for optimal fixing of the hook 8 on the eyelet 14.
  • the hook 8 is arranged so that, in the case where it is shaped in a "T", the bar which constitutes the head 12 of this hook 8 extends substantially parallel to the last turn Sn of the spiral 1. It should be noted that the stopping means such as the hook 8 does not contribute to the active length of the spiral 1.
  • FIG 2A This is a perspective view of a screw eye according to the invention.
  • this screw eye may, without limitation, be in the form of a cylinder.
  • the screw eye 14 comprises a base 16 in which a recess is provided such that a groove 18 extends through the base 16. This groove 18 opens into a slot 20 formed in the screw eye 14 transversely to the groove 18.
  • FIG 3A is a perspective view on which is shown the spiral 1 fixed to the stud 14 by its last outer coil 6.
  • the hook 8 is slid into the groove 18 of the stud 14, then immobilized by bringing its head 12 to rest against the bottom 22 of the slot 20.
  • the spiral 1 adopts a centered position in which its coils S1,..., Sn are arranged concentrically, preferably but not necessarily at equal distances from each other.
  • a force would have to be applied to the free end of the last coil on the exterior 6 of the spiral 1 which would include (see figure 3B ) a first component F2 directed radially towards the center 4 of the spiral 1 to allow the head 12 of the hook 8 to disengage from the slot 20 of the stud 14, and a second component F3 directed outwards from the groove 18 made in the base 16 of the stud 14, in order to allow the foot 10 of the hook 8 to disengage from this groove 18, which is practically impossible in the event of mechanical shocks for example during normal use of the watch.
  • hook 8 can of course be envisaged, for example, an "L" shape, oriented inwards (see figure 5A ) or exterior side (see figure 5B ), or in the shape of a marine anchor (see figure 6 ), or even in a "U" shape (see Figures 7A and 7B
  • Other forms of the clearance provided in the base of the peg 14 can also be considered: rather than a slot 20 extending transversely to the groove 18, at least one, and preferably two, notches 24 can be provided parallel to the groove 18, on either side of it. This embodiment is particularly well adapted to cases where the hook 8 is L-shaped or anchor-shaped.
  • the free end of the last outer turn 6 of the spiral 1 is fixed to the eyelet 14 by inserting the hook 8 into the groove 18 of the eyelet 14, then locking the free ends of the hook 8 into the notch(s) 24.
  • the opening of the hook 8 must be equal to or close to the thickness of the wall 26 separating the groove 18 from the notch 24.
  • the hook 8 is shaped in a “U”, it is even possible to do without the groove 18 and to provide, on the piton 14, only one or two notches 24 made in the peripheral wall of the piton 14.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Springs (AREA)

Claims (9)

  1. Horologieanordnung, gebildet aus einer Unruhspirale (1) und einem Spiralklötzchen (14) für eine Unruh-Spiralfeder-Baugruppe in einem mechanischen Uhrwerk, wobei die Unruhspirale (1) aus einer Folge von Windungen (S1, ... , Sn) gebildet ist, die sich zwischen einem ersten freien Ende, das als erste innere Windung (2) bezeichnet wird, und einem zweiten freien Ende, das als letzte äußere Windung (6) bezeichnet wird, erstrecken, wobei die letzte äußere Windung (6) der Unruhspirale (1) in einem Gesperr für ihre Befestigung an einem Spiralklötzchen (14) endet, die Unruhspirale (1) mit ihrer ersten inneren Windung (2) an einer Unruhwelle und mit ihrer letzten äußeren Windung (6) an dem Spiralklötzchen befestigt ist, wenn sich die Unruhspirale (1) in montiertem Zustand in dem Inneren der in dem mechanischen Uhrwerk montierten Unruh-Spiralfeder-Baugruppe befindet, dadurch gekennzeichnet, dass die Windungen (S1, ...., Sn) außermittig angeordnet sind, wenn sich die Unruhspirale (1) in freiem Zustand befindet, d. h., in einer Position, in der der Abstand (R2, 3), der die zweite Windung (S2) von der dritten Windung (S3) trennt, nicht gleich dem Abstand (R1, 2) ist, der die erste Windung (S1) von der zweiten Windung (S2) trennt, wobei sich dasselbe wiederholt, wenn der Abstand von dem Mittelpunkt (4) der Unruhfeder (1) zwischen jedem Paar aufeinanderfolgender Windungen zunimmt, wobei die Windungen (S1,. ..., Sn) in montiertem Zustand dieser Unruhspirale (1) konzentrisch umgelagert sind, wobei die Befestigung der Unruhspirale (1) an dem Spiralklötzchen in den Windungen der Unruhspirale (1) eine elastische Spannung hervorruft, durch die das Gesperr unverlierbar an dem Spiralklötzchen (14) befestigt ist.
  2. Horologieanordnung, gebildet aus einer Unruhspirale (1) und einem Spiralklötzchen (14) nach Anspruch 1, dadurch gekennzeichnet, dass das Gesperr die Form eines Hakens (8) aufweist.
  3. Horologieanordnung, gebildet aus einer Unruhspirale (1) und einem Spiralklötzchen (14) nach Anspruch 2, dadurch gekennzeichnet, dass der Haken (8) T-, L-, U- oder ankerförmig ist.
  4. Horologieanordnung, gebildet aus einer Unruhspirale (1) und einem Spiralklötzchen (14) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Unruhspirale (1) aus Silizium hergestellt ist.
  5. Horologieanordnung, gebildet aus einer Unruhspirale (1) und einem Spiralklötzchen (14) nach Anspruch 1, dadurch gekennzeichnet, dass das Spiralklötzchen (14) einen Sockel (16) aufweist, in dem eine Aussparung vorgesehen ist, in der das Gesperr gehalten wird, die Windungen konzentrisch umgelenkt werden, wenn sich diese Unruhspirale (1) in montiertem Zustand in dem Inneren der in das Uhrwerk eingebauten Unruh-Spiralfeder-Baugruppe befindet, wobei die Befestigung der Unruhspirale an dem Spiralklötzchen in den Windungen der Unruhspirale (1) eine elastische Spannung hervorruft, durch die das Gesperr unverlierbar mit dem Spiralklötzchen (14) in Eingriff gebracht wird.
  6. Horologieanordnung, gebildet aus einer Unruhspirale (1) und einem Spiralklötzchen (14) nach Anspruch 5, dadurch gekennzeichnet, dass die Aussparung durch eine Kerbe (18) gebildet ist, die sich beiderseits des Sockels (16) erstreckt, wobei sich diese Kerbe (18) in einen Schlitz (20) des Spiralklötzchens (14) quer zu der Kerbe (18) öffnet.
  7. Horologieanordnung, gebildet aus einer Unruhspirale (1) und einem Spiralklötzchen (14) nach Anspruch 5, dadurch gekennzeichnet, dass mindestens eine Kerbe (24) parallel zu der Kerbe (18) ausgeführt ist.
  8. Horologieanordnung, gebildet aus einer Unruhspirale (1) und einem Spiralklötzchen (14) nach Anspruch 7, dadurch gekennzeichnet, dass zwei Kerben (24) parallel zu der Kerbe (18) auf beiden Seiten derselben ausgeführt sind.
  9. Horologieanordnung, gebildet aus einer Unruhspirale (1) und einem Spiralklötzchen (14) nach Anspruch 5, dadurch gekennzeichnet, dass die Aussparung durch eine oder zwei Kerben (24) gebildet ist, die in der Umfangswand des Spiralklötzchens (14) ausgebildet sind.
EP23190159.6A 2022-08-30 2023-08-08 Spiralfeder einer unruh-spiralfeder einer mechanischen uhr Active EP4332687B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22192771.8A EP4332686A1 (de) 2022-08-30 2022-08-30 Spiralfeder für eine spiralunruh-einheit einer uhrwerke

Publications (2)

Publication Number Publication Date
EP4332687A1 EP4332687A1 (de) 2024-03-06
EP4332687B1 true EP4332687B1 (de) 2025-12-31

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EP22192771.8A Withdrawn EP4332686A1 (de) 2022-08-30 2022-08-30 Spiralfeder für eine spiralunruh-einheit einer uhrwerke
EP23190159.6A Active EP4332687B1 (de) 2022-08-30 2023-08-08 Spiralfeder einer unruh-spiralfeder einer mechanischen uhr

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US (1) US12535770B2 (de)
EP (2) EP4332686A1 (de)
JP (1) JP7591107B2 (de)
KR (1) KR102889184B1 (de)
CN (2) CN220894734U (de)

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JP7750561B2 (ja) * 2024-03-07 2025-10-07 株式会社３Ｄサイエンスゴルフ ゴルフ練習支援方法

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EP3252542B1 (de) * 2016-06-01 2022-05-18 Rolex Sa Teil zur befestigung einer unruhspirale
EP3499316B1 (de) * 2017-12-15 2024-08-07 Nivarox-FAR S.A. Schliesszylinderfeder für ein uhrwerk einer uhr, und herstellungsverfahren einer solchen feder
EP3543796A1 (de) 2018-03-21 2019-09-25 Nivarox-FAR S.A. Verfahren zur herstellung einer siliziumfeder
EP3570118B1 (de) 2018-05-14 2022-01-12 ETA SA Manufacture Horlogère Suisse Spiralklötzchen für die befestigung einer spiralfeder eines uhrwerks, und herstellungsverfahren eines solchen spiralklötzchens
CH714775B1 (fr) * 2018-05-14 2019-09-13 Eta Sa Mft Horlogere Suisse Piton pour la fixation d'un ressort spiral d'un mouvement d'horlogerie et procédés de fabrication d'un tel piton.
JP6626594B1 (ja) * 2018-07-02 2019-12-25 セイコーインスツル株式会社 渦巻ばね、トルク発生装置、時計用ムーブメント及び時計
FI3859449T3 (fi) * 2020-01-30 2026-03-13 Eta Sa Mft Horlogere Suisse Kierukkajousikäyttönauha
JP7476768B2 (ja) * 2020-11-13 2024-05-01 セイコーエプソン株式会社 テンプ、ムーブメント、機械式時計およびテンプの製造方法

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US12535770B2 (en) 2026-01-27
KR102889184B1 (ko) 2025-11-20
JP7591107B2 (ja) 2024-11-27
CN220894734U (zh) 2024-05-03
KR20240031086A (ko) 2024-03-07
EP4332686A1 (de) 2024-03-06
EP4332687A1 (de) 2024-03-06
CN117631509A (zh) 2024-03-01
JP2024035115A (ja) 2024-03-13
US20240069493A1 (en) 2024-02-29

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