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EP1584994B1 - Spiralrolle ohne Deformation des Fixierungsradius der Spiralfeder und Herstellungsverfahren derartige Spiralrolle - Google Patents

Spiralrolle ohne Deformation des Fixierungsradius der Spiralfeder und Herstellungsverfahren derartige Spiralrolle Download PDF

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Publication number
EP1584994B1
EP1584994B1 EP04008293A EP04008293A EP1584994B1 EP 1584994 B1 EP1584994 B1 EP 1584994B1 EP 04008293 A EP04008293 A EP 04008293A EP 04008293 A EP04008293 A EP 04008293A EP 1584994 B1 EP1584994 B1 EP 1584994B1
Authority
EP
European Patent Office
Prior art keywords
collet
staff
points
band
ferrule
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.)
Expired - Lifetime
Application number
EP04008293A
Other languages
English (en)
French (fr)
Other versions
EP1584994A1 (de
Inventor
Roger Lambert
Raymond Gabus
Pierre-André Buehler
Marco Verardo
Jean-Luc Bazin
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.)
Nivarox Far SA
Nivarox SA
Original Assignee
Nivarox Far SA
Nivarox 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
Priority to EP04008293A priority Critical patent/EP1584994B1/de
Application filed by Nivarox Far SA, Nivarox SA filed Critical Nivarox Far SA
Priority to DE602004019183T priority patent/DE602004019183D1/de
Priority to AT04008293T priority patent/ATE421720T1/de
Priority to US11/094,080 priority patent/US7213966B2/en
Priority to JP2005100967A priority patent/JP4630105B2/ja
Priority to TW094110542A priority patent/TW200602825A/zh
Priority to CNB2005100633170A priority patent/CN100405237C/zh
Priority to KR1020050028307A priority patent/KR20060045507A/ko
Publication of EP1584994A1 publication Critical patent/EP1584994A1/de
Priority to HK05111387.3A priority patent/HK1079580A1/xx
Application granted granted Critical
Publication of EP1584994B1 publication Critical patent/EP1584994B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D1/00—Gripping, holding, or supporting devices
    • G04D1/04—Tools for setting springs
    • 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
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D1/00—Gripping, holding, or supporting devices
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D1/00—Gripping, holding, or supporting devices
    • G04D1/02—Tweezers; Vice clamps or other special hand tools for watchmakers

Definitions

  • the present invention relates to a ferrule without deformation of the spiral fixing radius for securing the curve inside a spiral, and can also be incorporated into a spiral assembly in a single piece.
  • the invention also relates to a method for obtaining such a ferrule and its possible incorporation into a whole in a single piece.
  • the ferrule In a clockwork mechanical movement, the ferrule is an assembly interface of the balance spring. Originally it is a washer driven on the balance shaft and having at least one attachment point of the curve inside the spiral, for example using a conical pin, by gluing, or still by welding. Since welding, and in particular laser welding, is now the preferred method of attachment, the ferrule may be made of steel, and more particularly of special steels incorporating variable proportions of Ni, Mo, Co or Cr. The ferrule must first be small to have a small influence on the moment of inertia, and not introduce unbalance, but we expect a small room many other properties to contribute to the regularity of the regulating organ.
  • the driving has the least possible influence on maintaining a given distance between the balance shaft and the attachment point and that the outer contour of the ferrule is such that it does not disturb the active length of the curve in the center of the spiral.
  • the first solution is to make a slot of elasticity between the hole of axis and the edge of the shell as described for example in the patent CH 347 142 for a perfectly circular ferrule on which the spiral is fixed by means of a conical pin located in the plane of symmetry passing through the axis and the slot.
  • the patent CH 508 233 describes a ferrule of the same type, spiral riveted or glued in a groove, but of asymmetrical shape in racket with a shift of the axis hole, eliminating the risk of support of the first turn on the periphery of the ferrule.
  • the invention therefore relates to a ferrule whose particular shape makes it possible to have no change in attachment radius of the spiral after driving, ensuring perfect centering without unbalance. This makes it possible to have a driving force and an optimum holding torque, without excessive blocking on the balance shaft, so as to facilitate the subsequent operation of setting the benchmark, or even dismantling.
  • the invention also relates to a spiral-wound assembly and a method of manufacturing the ferrule and the spiral-wound assembly.
  • the invention relates to a ferrule according to claim 1 attached.
  • the other two contact points have, relative to the first contact point which is diametrically opposite the junction point between the ferrule and the spiral, angular openings greater than 90 °.
  • the metal band forming the ferrule may have the shape of a ribbon of unequal width, or a more massive snowshoe shape whose opening for driving on the axis has an outline. oval.
  • a ferrule according to the invention can be obtained according to known stamping methods, but according to a preferred method, especially for a ribbon-shaped strip, use is made of the Liga technique which has the advantage of allowing the simultaneous formation of a single piece of the ferrule and hairspring, and thereby provide even greater control over the value of R.
  • FIG. 1 a first embodiment of a ferrule according to the invention made of special steel, for example steel or nickel, and having a uniform thickness of the order of 0.2 mm, is shown in plan view on a large scale.
  • This ferrule is intended to be driven on a balance shaft 2 (shown in dotted lines) of center 0.
  • the ferrule is continued by a continuous strip whose contours, inside 11 and outside 12, have a particular shape whose width "l" is not uniform at all points of the strip 10, and whose inner contour 11 does not comprises three points of contact 1, 3, 5 with the axis 2 away from it to form recesses 11a, 11b, 11c.
  • the strip has a first recess 11a constituting an arm 14, whose end comprises on the outer contour 12 a junction point 4 at a distance R from the center 0 of the axis 2, and on which will be welded the end of the Curve inside the spiral 9.
  • the distance R which is the radius of attachment of the hairspring to the ferrule, corresponds to an essential characteristic of construction in that its value should ideally not be modified by the driving operation in order to maintain a perfectly centered hairspring. According to the most demanding standards in the horological field, the displacement of the junction point 4 must not be greater than 5 ⁇ m and, as will be demonstrated later, this threshold can be very strongly lowered with a ferrule according to the invention.
  • the center 0 of the balance shaft and the junction point 4 define an axis of symmetry xx 'for the ferrule, that is to say for its outer contour 12 and inner 11 bearing on the balance shaft 2 by the three contacts 1, 3 and 5.
  • a first contact point 1 is diametrically opposite the junction point 4 and the other two contact points 3, 5 are symmetrical with respect to the axis xx 'with an angular offset by relative to the first contact point 1 of ⁇ 1 for the contact point 3 in the clockwise direction and of ⁇ 5 for the contact point in the counterclockwise direction the angles ⁇ 1 and ars having the same value greater than 90 °.
  • This therefore defines between the symmetrical contact points 3, 5 an angular offset ⁇ 3 whose value is one of the determining factors for the purpose of the invention, as will be understood later.
  • the strip 10 has two symmetrical handles 16, 18 joining at the three contact points 1, 3, 5.
  • the handles 16, 18 are substantially diametrically opposed to the contact points symmetrical 3, 5 and delimit symmetrical recesses 11b, 11c.
  • the ends 6, 8 of the loops 16, 18 are located, with respect to the center 0 of the axis 2, at a distance less than the radius R of fixing the hairspring, so that the curve inside the hairspring 9 can not not come into contact with the outer contour 12 of the ferrule during pendulum oscillations.
  • the radius R is of the order of 0.5 mm, and very strict construction parameters, it does not appear clearly on the figure 1 that according to another essential feature of the invention, the width "1" of the strip 10 is not uniform all around.
  • the widths l 1 , l 3 , l 5 at the contact points 1, 3, 5 are identical.
  • the band has a width l 4 greater about 15% and at the loops 16, 18, the widths l ⁇ , l ⁇ are 30% to 35% greater than 1 1 . It is obvious that the preceding values are given only as examples and that they could vary according to the material used and the size of the handles 16, 18.
  • Another characteristic of a ferrule according to the invention relates to the value that should be given to the angle ⁇ 3 between the second contact point 3 and the third contact point 5 to have a minimum dR variation of the radius R.
  • the inner contour 11 of the ferrule comprises three contact points 1, 3, 5 with the axis 2 of the balance, respectively having for angular offset ⁇ 1 , ⁇ 3 , ⁇ 3 , but the recesses 11 a , 11 b and 11 c the inner contour 11 between said contact points are reduced to "non-contact" areas.
  • the outer contour 12 has a more regular shape resembling the shape of a racket, the junction point 4 at the end of the arm 14 being in the same way located at a distance R from the center 0 of the axis 2 greater than that any other points 6, 8, 13, 15 and 17 of said outer contour 12.
  • dR the distance from the center 0 of the axis 2
  • ferrules according to the invention which have just been described can be manufactured according to known methods by stamping.
  • the preferred method, especially for the ferrule corresponding to the first embodiment and when the spiral comes from material with the shell is to use the LIGA technique known since the mid-1970s.
  • the method basically consists in spreading on a substrate previously coated with a sacrificial layer a positive or negative photoresist on a thickness corresponding to the desired height for the ferrule and forming by means of a mask by photolithography and etching a hollow structure corresponding to the desired contour for the ferrule or the ferrule-spiral assembly.
  • said hollow structure is filled with a metal or a metal alloy either by electrodeposition as indicated for example in the patent US 4,661,212 or by compression and sintering nanoparticles, as indicated for example in the patent application US 2001/0038803 .
  • the ferrule or the ferrule-spiral assembly of the substrate is released by elimination of the sacrificial layer.
  • This method also offers the advantage of being able to make a batch production and thus to lower the unit cost of the products obtained.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Springs (AREA)
  • Adornments (AREA)
  • Wire Processing (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)

Claims (7)

  1. Spiralrolle, die dazu vorgesehen ist, auf eine Welle (2) einer Unruh getrieben zu werden, und der Montage einer Spiralfeder (9) dient, wobei die Spiralrolle eine Symmetrieachse xx' besitzt, die durch das Zentrum O der Welle (2) und durch den Verbindungspunkt (4) zwischen der Spiralrolle und der Spiralfeder (9) verläuft, wobei sie aus einem Metallstreifen (10) gebildet ist, dessen innerer Umriss (11) Aussparungen (11a, 11b, 11c) begrenzt und drei Kontaktpunkte (1, 3, 5) mit der Welle (2), die unter Winkelöffnungen α1, α3, α5 verteilt sind, enthält, wobei die Öffnung α3 in Bezug auf die Achse xx' symmetrisch ist, zum Verbindungspunkt (4) gerichtet ist und einen Wert α3 > 100° besitzt, dadurch gekennzeichnet, dass sich der Verbindungspunkt (4) auf dem äußeren Umriss (12) am Ende eines Arms (14) in einem Abstand R vom Zentrum O der Welle (2), der größer als jener jedes anderen Punkts (6, 8, 13, 15, 17) des äußeren Umrisses (12) ist, befindet und dass der Streifen (10), der die Spiralrolle bildet, eine veränderliche Breite besitzt, was ermöglicht, dass der Abstand R nach dem Auftreiben im Wesentlichen nicht verändert wird.
  2. Spiralrolle nach Anspruch 1, dadurch gekennzeichnet, dass die Winkelöffnungen α1 und α5 Werte haben, derart, dass α1 = α1 > 90°.
  3. Spiralrolle nach Anspruch 1, dadurch gekennzeichnet, dass der Streifen (10) die Form eines Bandes hat, dessen Abschnitte, die sich im Wesentlichen gegenüber den nicht auf der Achse xx' liegenden Kontaktpunkten (3, 5) befinden, Bügel (16, 18) mit einer Breite l6, l8, die größer als jene der anderen Teile des Streifens (10) ist, bilden.
  4. Spiralrolle nach Anspruch 1, dadurch gekennzeichnet, dass die Aussparung (11a) einen ovalen Umriss hat und dass der äußere Umriss (12) des Streifens (10) eine rechtwinklige Form mit abgerundeten Ecken hat, die durch den Arm (14) verlängert ist, der den Verbindungspunkt (4) zwischen der Spiralrolle und der Spiralfeder (9) enthält.
  5. Spiralrolle nach Anspruch 1, dadurch gekennzeichnet, dass die Spiralfeder (9) mit dem Arm (14) des Metallstreifens (10) einteilig ausgebildet ist.
  6. Spiralrolle nach Anspruch 1, die chargenweise durch ein Verfahren hergestellt werden kann, das die Schritte enthält, die darin bestehen:
    a - Aufbringen einer positiven oder negativen Photoresistschicht, die die gewünschte Dicke für die Spiralrolle hat, auf ein vorher mit einer Opferschicht überzogenes Substrat;
    b - Bilden einer Hohlstruktur, die dem Innenumriss und dem Außenumriss einer Charge von Spiralrollen entspricht, mittels einer Maske durch Photolithographie und chemischer Ätzung;
    c - Versehen der Hohlstruktur mit einem geeigneten Metall oder einer geeigneten Legierung durch Metallisieren und
    d - Freigeben der Charge von Spiralrollen durch Entfernen der Opferschicht.
  7. Spiralrolle nach Anspruch 6, dadurch gekennzeichnet, dass im Schritt "b" auch der Umriss der Spiralfeder (9) gebildet wird.
EP04008293A 2004-04-06 2004-04-06 Spiralrolle ohne Deformation des Fixierungsradius der Spiralfeder und Herstellungsverfahren derartige Spiralrolle Expired - Lifetime EP1584994B1 (de)

Priority Applications (9)

Application Number Priority Date Filing Date Title
DE602004019183T DE602004019183D1 (de) 2004-04-06 2004-04-06 Spiralrolle ohne Deformation des Fixierungsradius der Spiralfeder und Herstellungsverfahren derartige Spiralrolle
AT04008293T ATE421720T1 (de) 2004-04-06 2004-04-06 Spiralrolle ohne deformation des fixierungsradius der spiralfeder und herstellungsverfahren derartige spiralrolle
EP04008293A EP1584994B1 (de) 2004-04-06 2004-04-06 Spiralrolle ohne Deformation des Fixierungsradius der Spiralfeder und Herstellungsverfahren derartige Spiralrolle
JP2005100967A JP4630105B2 (ja) 2004-04-06 2005-03-31 ひげゼンマイの取り付け半径が変化しないコレット（ひげ玉）とその製造方法
US11/094,080 US7213966B2 (en) 2004-04-06 2005-03-31 Collet without deformation of the fixation radius of the balance-spring and manufacturing method of the same
TW094110542A TW200602825A (en) 2004-04-06 2005-04-01 Collet without deformation of the fixation radius of the balance-spring and manufacturing method of the same
CNB2005100633170A CN100405237C (zh) 2004-04-06 2005-04-06 不会使游丝的固定半径变形的内桩及其制造方法
KR1020050028307A KR20060045507A (ko) 2004-04-06 2005-04-06 발란스 스프링의 고정반경을 변형시키지 않는콜렛(ｃｏｌｌｅｔ) 및 콜렛의 제조방법
HK05111387.3A HK1079580A1 (en) 2004-04-06 2005-12-12 Collet without deformation of the fixation radius of the balance-spring and manufacturing method of the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04008293A EP1584994B1 (de) 2004-04-06 2004-04-06 Spiralrolle ohne Deformation des Fixierungsradius der Spiralfeder und Herstellungsverfahren derartige Spiralrolle

Publications (2)

Publication Number Publication Date
EP1584994A1 EP1584994A1 (de) 2005-10-12
EP1584994B1 true EP1584994B1 (de) 2009-01-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04008293A Expired - Lifetime EP1584994B1 (de) 2004-04-06 2004-04-06 Spiralrolle ohne Deformation des Fixierungsradius der Spiralfeder und Herstellungsverfahren derartige Spiralrolle

Country Status (9)

Country Link
US (1) US7213966B2 (de)
EP (1) EP1584994B1 (de)
JP (1) JP4630105B2 (de)
KR (1) KR20060045507A (de)
CN (1) CN100405237C (de)
AT (1) ATE421720T1 (de)
DE (1) DE602004019183D1 (de)
HK (1) HK1079580A1 (de)
TW (1) TW200602825A (de)

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EP3252542B1 (de) * 2016-06-01 2022-05-18 Rolex Sa Teil zur befestigung einer unruhspirale
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EP3627238A1 (de) 2018-09-21 2020-03-25 Nivarox-FAR S.A. Elastisches halterungsorgan für die befestigung einer uhrenkomponente auf einem halteelement
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US6558868B2 (en) * 2001-02-16 2003-05-06 Brookhaven Science Associates, Llc Method of fabricating a high aspect ratio microstructure
EP1302821A3 (de) * 2001-10-10 2010-05-05 Franck Muller-Watchland SA Spiralfeder für Zeitmessgerät

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CN1680892A (zh) 2005-10-12
DE602004019183D1 (de) 2009-03-12
JP2005300532A (ja) 2005-10-27
US20050219957A1 (en) 2005-10-06
TW200602825A (en) 2006-01-16
US7213966B2 (en) 2007-05-08
JP4630105B2 (ja) 2011-02-09
HK1079580A1 (en) 2006-04-07
KR20060045507A (ko) 2006-05-17
EP1584994A1 (de) 2005-10-12
ATE421720T1 (de) 2009-02-15
CN100405237C (zh) 2008-07-23

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