EP2175328A2 - Spiralfeder der Resonatorunruh und Fabrikationsmethode - Google Patents

Spiralfeder der Resonatorunruh und Fabrikationsmethode Download PDF

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Publication number
EP2175328A2
EP2175328A2 EP10151818A EP10151818A EP2175328A2 EP 2175328 A2 EP2175328 A2 EP 2175328A2 EP 10151818 A EP10151818 A EP 10151818A EP 10151818 A EP10151818 A EP 10151818A EP 2175328 A2 EP2175328 A2 EP 2175328A2
Authority
EP
European Patent Office
Prior art keywords
spiral
curve
balance
turns
blade
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.)
Granted
Application number
EP10151818A
Other languages
English (en)
French (fr)
Other versions
EP2175328B1 (de
EP2175328A3 (de
Inventor
Thierry Conus
Kaspar Trümpy
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 EP10151818.1A priority Critical patent/EP2175328B1/de
Publication of EP2175328A2 publication Critical patent/EP2175328A2/de
Publication of EP2175328A3 publication Critical patent/EP2175328A3/de
Application granted granted Critical
Publication of EP2175328B1 publication Critical patent/EP2175328B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • G04B17/34—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring onto the balance
    • G04B17/345—Details of the spiral roll
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0035—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the regulating mechanism
    • G04D3/0041—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the regulating mechanism for coil-springs
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0069—Watchmakers' or watch-repairers' machines or tools for working materials for working with non-mechanical means, e.g. chemical, electrochemical, metallising, vapourising; with electron beams, laser beams

Definitions

  • the present invention relates to a spiral spring-balance spiral spring obtained by a manufacturing method for improving the isochronism by acting on the one hand on the construction parameters of the spiral as such, on the other hand on a method of attachment on the balance shaft to reduce the geometric difference inherent in the usual fastening modes between the point of origin of the Archimedes spiral and the axis of rotation of the balance.
  • isochronism is understood to mean the gait variations as a function of the oscillation amplitude variations of the balance wheel, as well as the gait deviations between the horizontal position and the vertical positions of the watch.
  • a spiral having turns of uniform section and pitch, allows, by a particular conformation of the curve inside and the curve outside in the plane of the spiral or, more often, in different planes. , to obtain a concentric development of the hairspring and to have a displacement of the center of mass of the hairspring and a variation of the spiral inertia during the development, minimizing the gait disturbances as a function of the amplitude and the positions of the hairspring compared to the gravity vector.
  • height congestion is a drawback for its use in wristwatches should have, for obvious reasons of aesthetics, as small a thickness as possible.
  • a flat hairspring such as that represented in FIG. figure 1 .
  • Such a hairspring is manufactured in known manner by strapping from a wire or a metal strip of constant section over its entire length, and has at rest a constant pitch between the turns.
  • the curve inside is fixed, for example by laser welding, on a shell 20, driven on the axis 9 of a balance 8.
  • the subject of the invention is therefore a flat hairspring and processes for manufacturing by micro-machining or galvanic growth, making it possible to conveniently choose the most favorable construction parameters in order to improve the isochronism by the shape of the hairspring as well as than by the fastening means.
  • the invention relates to a flat spiral, formed of a blade composed of a succession of turns having between them a pitch "p", for a balance adjusting mechanism, said spring being obtained by a manufacturing method which allows to get closer to a perfect isochronism.
  • the turns of rectangular section are formed in a single continuous material from the curve inside to the curve outside, but have, on certain portions between the fastener in the center and the fastener outside. , a non-uniform section "s" and / or have one or more shaped portions outside the pattern of a perfect spiral.
  • the term "non-uniform section” means that for a blade having a constant height "h", the thickness "e" of a selected portion may be either greater than or less than the thickness of the remainder of the blade constituting the spiral.
  • the manufacturing process uses micro-techniques, such as photolithography and electroplating of a metal or an alloy, or the micromachining of a wafer.
  • "thickness" h made of an amorphous or crystalline material such as silicon in monocrystalline or polycrystalline form.
  • the section "s" of the turns increases progressively from the curve outside to the curve inside.
  • the pitch "p" between the turns decreases steadily from the outside curve to the curve inside.
  • the invention also offers the advantage of being able to manufacture, at the same time as the hairspring itself, the fixing means on the balance shaft, this fastening means being formed by a self-locking washer having in the center, by for example, a star-shaped contour and having recesses in its periphery to give it sufficient elasticity to mount and avoid a gap between the point of origin of the Archimedes spiral and the axis of rotation of the balance.
  • the manufacturing process basically consists of applying the LIGA technique to form a mold corresponding to the profile desired by the spiral. Given the properties of photoresists currently available on the market, it is possible to adjust the thickness of the photoresist layer to obtain the full range of spirals with blade heights of up to a few tenths of a millimeter.
  • the method basically consists in etching a wafer of said material through masks.
  • the figure 1 represents a sprung balance of the prior art mentioned in the preamble. Its characteristics will serve as a reference to show the significant progress made by the invention at the level of isochronism.
  • the hairspring 10 has the end of its curve in the center 11 fixed in a conventional manner on a shell 20 driven on the axis 9 of the balance 8 pivoted between the plate 7 and the cock 6.
  • the regulating device further comprises, in a known manner, a stud carrier 5 for fixing the curve to the outside 14 of the hairspring 10 and possibly a racket 4 provided with pins 3 and a racket tail 2 opposite a graduation 1.
  • said hairspring is formed of 14 turns having a uniform rectangular cross-section, for example 0.05 x 0.30 mm from the curve at the center 11 to the curve at the outside 14, and that the turns have between them a constant pitch p .
  • the point of attachment of the curve to the center 11 is situated at a distance r from the center of pivoting of the spiral, and that of the curve to the outside 14, at a distance R, before the bend 16.
  • r and R are respectively 0.57 mm and 2.46 mm.
  • the Figures 8 and 9 correspond to a third embodiment in which the curve inside 11 is Grossmann type 13, that is to say having a geometry such as that described in the book "General Theory of Watchmaking" of L. Defose. Such a geometry is very delicate to obtain by deformation of a metal blade.
  • the manufacturing method according to the invention makes it possible to very easily obtain such a configuration without the intervention of highly qualified personnel.
  • the diagram shown in figure 9 shows that the maximum deviation at 300 ° is only 2.1 s / d.
  • FIG 10 a spiral corresponding to the first embodiment is shown ( figure 4 ) in which the shell 20 is replaced by a self-locking washer 17 formed at the same time as the hairspring 10.
  • This washer 17 has at its center a contour 19 such that it allows to block without play the axis 9 of the balance 8 having a certain elasticity provided by lights 18 distributed around the blocking contour 19 shown in a star at the figure 10 .
  • the Figures 10A to 10E show other possible conformations of the self-locking washer 17 with a blocking contour 19 triangle, square, hexagonal, circular or ogive.
  • the self-locking spiral washer is produced by photolithography and galvanic growth, it is advantageous, by means of an additional step, to make said self-locking washer 17 with a thickness greater than the height of the blade to obtain a better holding of the hairspring. 10 on the axis 9 of the balance.
  • 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 "h" height of the blade and forming by means of a mask by photolithography and etching a hollow structure corresponding to the desired contour for the hairspring.
  • 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 hairspring is released from the substrate by elimination of the sacrificial layer.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Springs (AREA)
  • Micromachines (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Nonmetallic Welding Materials (AREA)
  • Vehicle Body Suspensions (AREA)
EP10151818.1A 2003-02-06 2004-02-02 Uhrwerk umfassend einen flachen Spiralfeder Expired - Lifetime EP2175328B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10151818.1A EP2175328B1 (de) 2003-02-06 2004-02-02 Uhrwerk umfassend einen flachen Spiralfeder

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03075362A EP1445670A1 (de) 2003-02-06 2003-02-06 Spiralfeder der Resonatorunruh und Fabrikationsmethode
EP10151818.1A EP2175328B1 (de) 2003-02-06 2004-02-02 Uhrwerk umfassend einen flachen Spiralfeder
EP04707219A EP1593004B1 (de) 2003-02-06 2004-02-02 Spiralfeder der resonatorunruh und fabrikationsmethode

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP04707219.4 Division 2004-02-02
EP04707219A Division EP1593004B1 (de) 2003-02-06 2004-02-02 Spiralfeder der resonatorunruh und fabrikationsmethode

Publications (3)

Publication Number Publication Date
EP2175328A2 true EP2175328A2 (de) 2010-04-14
EP2175328A3 EP2175328A3 (de) 2011-03-30
EP2175328B1 EP2175328B1 (de) 2014-07-30

Family

ID=32605375

Family Applications (4)

Application Number Title Priority Date Filing Date
EP03075362A Withdrawn EP1445670A1 (de) 2003-02-06 2003-02-06 Spiralfeder der Resonatorunruh und Fabrikationsmethode
EP04707219A Expired - Lifetime EP1593004B1 (de) 2003-02-06 2004-02-02 Spiralfeder der resonatorunruh und fabrikationsmethode
EP10151818.1A Expired - Lifetime EP2175328B1 (de) 2003-02-06 2004-02-02 Uhrwerk umfassend einen flachen Spiralfeder
EP06003086A Expired - Lifetime EP1655642B1 (de) 2003-02-06 2004-02-02 Spiralfeder der Resonatorunruh

Family Applications Before (2)

Application Number Title Priority Date Filing Date
EP03075362A Withdrawn EP1445670A1 (de) 2003-02-06 2003-02-06 Spiralfeder der Resonatorunruh und Fabrikationsmethode
EP04707219A Expired - Lifetime EP1593004B1 (de) 2003-02-06 2004-02-02 Spiralfeder der resonatorunruh und fabrikationsmethode

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP06003086A Expired - Lifetime EP1655642B1 (de) 2003-02-06 2004-02-02 Spiralfeder der Resonatorunruh

Country Status (9)

Country Link
US (3) US20060055097A1 (de)
EP (4) EP1445670A1 (de)
JP (2) JP5122073B2 (de)
KR (1) KR20050098881A (de)
CN (1) CN100435044C (de)
AT (1) ATE486304T1 (de)
DE (2) DE602004029762D1 (de)
TW (1) TW200426547A (de)
WO (1) WO2004070476A2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3795855A1 (de) 2019-09-20 2021-03-24 Patek Philippe SA Genève Herstellungsverfahren einer uhrfeder aus monokristallinem material, und nach diesem verfahren erzeugte uhrfeder

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* Cited by examiner, † Cited by third party
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CN100435044C (zh) 2008-11-19
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DE602004029762D1 (de) 2010-12-09
US20190107809A1 (en) 2019-04-11
US20060055097A1 (en) 2006-03-16
JP5122073B2 (ja) 2013-01-16
EP1593004A2 (de) 2005-11-09
CN1745341A (zh) 2006-03-08
KR20050098881A (ko) 2005-10-12
EP1655642A2 (de) 2006-05-10
EP1655642A3 (de) 2006-09-27
HK1084737A1 (zh) 2006-08-04
US10444706B2 (en) 2019-10-15
JP2013015534A (ja) 2013-01-24
US20150277382A1 (en) 2015-10-01
ATE486304T1 (de) 2010-11-15
JP5389999B2 (ja) 2014-01-15
EP1445670A1 (de) 2004-08-11
WO2004070476A2 (fr) 2004-08-19
EP2175328A3 (de) 2011-03-30
DE602004023518D1 (de) 2009-11-19
JP2006516718A (ja) 2006-07-06
EP1593004B1 (de) 2010-10-27
EP1655642B1 (de) 2009-10-07
TW200426547A (en) 2004-12-01

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