EP2867734A1 - Antriebsfeder für eine uhr - Google Patents
Antriebsfeder für eine uhrInfo
- Publication number
- EP2867734A1 EP2867734A1 EP13725709.3A EP13725709A EP2867734A1 EP 2867734 A1 EP2867734 A1 EP 2867734A1 EP 13725709 A EP13725709 A EP 13725709A EP 2867734 A1 EP2867734 A1 EP 2867734A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- thickness
- spring
- motor spring
- outer turn
- 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
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
- G04B1/00—Driving mechanisms
- G04B1/10—Driving mechanisms with mainspring
- G04B1/14—Mainsprings; Bridles therefor
-
- 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
- G04B1/14—Mainsprings; Bridles therefor
- G04B1/145—Composition and manufacture of the 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
- G04B1/00—Driving mechanisms
- G04B1/10—Driving mechanisms with mainspring
- G04B1/18—Constructions for connecting the ends of the mainsprings with the barrel or the arbor
- G04B1/185—Friction clutch between spring and spring cylinder
Definitions
- the invention relates to a mainspring for a timepiece and in particular for a mainspring intended to be integrated into a cylinder.
- the object of the present invention is to overcome all or part of the drawbacks mentioned above by proposing a method that simplifies the steps of manufacturing small dimensions while significantly reducing the scrap rate.
- the invention relates to a motor spring comprising a metal blade wound on itself, characterized in that it comprises an outer turn comprising an extra thickness between the beginning of the outer coil and before the free end of the outer turn which forms a flange in one piece with the blade.
- the invention relates to a motor spring comprising a metal blade wound on itself, characterized in that it comprises an outer turn comprising an extra thickness in one piece with the blade, between the beginning of the outer turn and before the free end of the outer turn, which forms a base and in that at least a second blade forming a flange in one piece with the blade extends from the extra thickness forming a base.
- said at least one second blade is formed with respect to the thickness and / or the height of the excess thickness
- said at least one second blade has a constant thickness and / or a constant height
- said at least one second blade has a non-constant thickness and / or a non-constant height
- the excess thickness is formed with respect to the thickness and / or the height of the blade
- the excess thickness comprises a constant thickness and / or a constant height
- the extra thickness has a non-constant thickness and / or a non-constant height
- the mainspring comprises an inner coil with an eyelet and / or a hook and / or a ferrule formed with the blade;
- the motor spring is formed based on an alloy of nickel and phosphorus.
- the invention relates to a timepiece characterized in that it comprises a mainspring according to one of the preceding variants.
- the invention relates to a method of manufacturing a mainspring comprising the following steps:
- the mold is formed by photolithography
- the mold comprises several levels one above the other;
- steps a) and b) are repeated before step c) to form several levels one above the other.
- FIG. 1 is a representation of a motor spring according to a first embodiment of the invention
- FIG. 2 is a representation of a mainspring according to a second embodiment of the invention.
- FIGS. 3 to 6 are representations of the successive steps of a method of manufacturing a motor spring according to the invention.
- FIG. 7 is a representation of a motor spring according to a third embodiment of the invention.
- the invention relates to a mainspring as for a cylinder or a ring of a timepiece.
- a mainspring as for a cylinder or a ring of a timepiece.
- other applications requiring a mainspring are possible such as an automaton.
- the motor spring 1 comprises a metal blade 3 wound on itself.
- the blade 3 has an excess thickness 5 on a portion of the outer turn forming a flange 7 in one piece with the blade 3.
- the extra thickness 5 extends radially in a substantially uniform thickness towards the outside of the mainspring 1, that is to say that the inside of the outer turn can always slide against the outside of the remainder of the blade 3.
- the extra thickness 5 is formed between the beginning of the the outer turn and before the free end of the outer coil, that is to say that the free end of the outer coil has substantially the same section as the rest of the outer coil unthickened. It is therefore understood that the pitfalls generated by the small dimensions of the flange 7 are canceled by the one-piece construction.
- the flange 7 is always perfectly positioned relative to the blade 3 of the mainspring 1.
- the blade 3 of the mainspring 1 also comprises, at the level of its inner coil, an eyelet 9 integrally formed with the blade 3 and intended to cooperate, for example, with the hook of FIG. a bung.
- This architecture allows, as will be explained below, to be very precise on the dimensions of the opening of the eyelet 9 and its positioning on the inner turn of the blade 3.
- the motor spring 1 1 comprises a blade 1 3 metal wound on itself.
- the blade 1 3 has an excess thickness 1 5 on a portion of the outer coil forming a flange 1 7 in one piece with the blade 13.
- the extra thickness 15 extends radially in a thickness substantially uniform towards the outside of the mainspring 1 1, that is to say that the inside of the outer turn can always slide against the outside of the remainder of the blade 1 3.
- the extra thickness 15 is formed between the beginning of the outer turn and before the free end of the outer turn, that is to say that the free end of the outer coil has substantially the same section as the rest of the outer coil unthickened. It is therefore understood that the pitfalls generated by the small dimensions of the flange 17 are canceled by the one-piece construction.
- the flange 1 7 is always perfectly positioned relative to the blade 13 of the motor spring 1 January.
- the blade 13 of the motor spring 1 1 also comprises, at its inner coil, a ferrule 19 integral with the blade 13 and intended to cooperate, for example, with a bung or more generally a pivoting axis.
- This architecture allows, as will be explained below, to be very precise on the dimensions of the opening of the shell 19 and its positioning on the inner turn of the blade 1 3.
- Figures 3 to 6 show successive main steps of the electroforming manufacturing process of a motor spring 1, 1 1 according to the invention.
- the method comprises a first step of providing a substrate 41 having an electrically conductive upper layer.
- This layer can be obtained by the deposition of an electrically conductive material on an insulating material or in that the substrate is formed of an electrically conductive material.
- the main steps of electroforming consist in forming a mold and then filling the mold with a material, for example, using electroplating.
- This type of electroforming is known by the abbreviation LIGA from the German terms "rontgenLIthographie, Galvanoformung &Abformung".
- LIGA-type processes depending on whether the multi-level mold is formed between each electroplating or is formed entirely to be filled only after.
- the technique presented consists in forming each level, that is to say forming a level of the mold and the complete before going to the next level.
- any type of electroforming, LIGA type or not, capable of forming a monobloc motor spring at least one level is possible.
- the first level 47 of the mold 42 is formed using, for example, a photolithography of a resin as illustrated in FIG. 3. It is formed at least a cavity of corresponding shape to the pattern of the future motor spring 1, 1 1, that is to say with its integrated flange 7, 17 and, optionally, its shell 19.
- the first level is then filled by electrodeposition of a metal material 46.
- a single level may be sufficient to form the future motor spring 1 1 with its integrated flange 17 and, optionally, its shell 1 9.
- a second and third level is formed. using, for example, also a photolithography of a resin.
- a second step at least one recess of shape corresponding to a second pattern is formed, that is to say with addition of material at the level of the future hollow of the eyelet 9 and communicating with said at least one cavity of the first level 47.
- the second level 49 is then filled by electrodeposition of a metallic material 48.
- At least a second shaped cavity is formed corresponding to that for example of the first pattern of the first level, that is to say the blade 3 with its integrated flange 7 and communicating with said at least one cavity of the first level and the recess of the second level.
- the third level is then filled by electroplating a metal material 50.
- the deposited metal material 46, 48, 50 is an alloy of nickel and phosphorus, typically with substantially 12% phosphorus (NiP12). Indeed, it has been found satisfactory to use this type of alloy for the manufacture of a motor spring because of its elastic modulus around 90GPa and its elastic limit around 1700 MPa.
- the present invention is not limited to the illustrated example but is susceptible of various variations and modifications that will occur to those skilled in the art.
- the eyelet assembly 9 - hook between the motor spring 1 and the plug of the barrel can be reversed. It is therefore understood that the mainspring 1 can be provided with the hook in place of the eyelet 9.
- the motor spring 21 comprises a metal plate 23 wound on itself.
- the blade 23 has an extra thickness 25 on a part of the outer turn forming a base in one piece with the blade 23.
- the blade 23 of the motor spring 21 also comprises, at its inner coil, a ferrule 29 integral with the blade 23 and intended to cooperate, for example, with a bung or more generally a pivoting axis.
- the excess thickness 25 extends radially in a substantially uniform thickness towards the outside of the mainspring 21, that is to say that the inside of the outer coil can always slide against the outside the rest of the blade 23.
- the excess thickness 25 is formed between the beginning of the outer turn and before the free end of the outer turn, that is to say that the free end of the outer turn substantially comprises the same section as the rest of the unthickened outer coil.
- the extra thickness 25 forms a base for at least one second blade 22, 24 forming a flange 27 in one piece with the blade 23.
- said at least one second blade 22, 24 loins at least partially outside the outer turn of the mainspring 21.
- said at least one second blade 22, 24 may for example be longer than half of the outer turn.
- Said at least one second blade 22, 24 may also include a plurality of second blades 22, 24 extending in a section and / or a direction and / or a different direction or not with respect to the extra thickness 25 forming its base.
- the thickening 25 forming the base comprises two second blades 22, 24 of identical thickness and height but of different lengths and extending in the same direction but according to opposite directions.
- oversize 5, 1 5, 25 may be formed on the same blade 3, 13, 23 without the motor spring 1, 1 1, 21 is more difficult to manufacture.
- the extra thickness 5, 15, 25 does not intend to be limited to that of the thickness of the blade 3, 13, 23, it can also relate to the thickness and / or the height. Thus, for example, the extra thickness could be at a greater height to selectively bend between the drum and the barrel cover.
- each motor spring 1, 1 1, 21 can be combined with one another.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Springs (AREA)
- Vehicle Body Suspensions (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13725709.3A EP2867734B1 (de) | 2012-06-28 | 2013-05-30 | Triebfeder für uhr |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12174129 | 2012-06-28 | ||
PCT/EP2013/061168 WO2014001017A1 (fr) | 2012-06-28 | 2013-05-30 | Ressort-moteur pour une piece d'horlogerie |
EP13725709.3A EP2867734B1 (de) | 2012-06-28 | 2013-05-30 | Triebfeder für uhr |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2867734A1 true EP2867734A1 (de) | 2015-05-06 |
EP2867734B1 EP2867734B1 (de) | 2016-05-04 |
Family
ID=48536914
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13725709.3A Active EP2867734B1 (de) | 2012-06-28 | 2013-05-30 | Triebfeder für uhr |
Country Status (7)
Country | Link |
---|---|
US (1) | US9329571B2 (de) |
EP (1) | EP2867734B1 (de) |
JP (1) | JP5961755B2 (de) |
CN (1) | CN104412175B (de) |
HK (1) | HK1208270A1 (de) |
RU (1) | RU2634792C2 (de) |
WO (1) | WO2014001017A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH714452A2 (fr) * | 2017-12-15 | 2019-06-28 | Nivarox Sa | Ressort de barillet pour un mouvement horloger d’une pièce d’horlogerie et procédé de fabrication d’un tel ressort. |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3018097A (en) * | 1959-04-08 | 1962-01-23 | Sandvik Steel Inc | Power springs |
CH1517065A4 (fr) * | 1965-11-03 | 1967-04-15 | Girard Perregaux Et Cie S A | Montre portative |
US3433011A (en) * | 1966-04-30 | 1969-03-18 | Citizen Watch Co Ltd | Barrel spring |
CH593507B5 (fr) | 1967-01-24 | 1977-12-15 | Vimetal Sa | Ressort moteur pour piece d'horlogerie a remontage automatique. |
CH610466B5 (en) * | 1968-10-29 | 1979-04-30 | Vimetal Sa | Drive device for timepiece with spring and barrel |
CH1687869A4 (fr) | 1969-11-13 | 1972-10-13 | Vimetal S A | Ressort-moteur pour pièce d'horlogerie |
US3928085A (en) * | 1972-05-08 | 1975-12-23 | Suwa Seikosha Kk | Timepiece mainspring of cobalt-nickel base alloys having high elasticity and high proportional limit |
JPH09113637A (ja) * | 1995-10-16 | 1997-05-02 | Orient Watch Co Ltd | 携帯用機械時計の手巻ゼンマイ構造 |
WO1999012080A1 (fr) * | 1997-08-28 | 1999-03-11 | Seiko Epson Corporation | Ressort, ressort moteur, ressort spiral, mecanisme d'entrainement employant ceux-ci, et compteur de temps |
CN1418295A (zh) * | 2000-07-11 | 2003-05-14 | 精工爱普生株式会社 | 弹簧、驱动机构以及应用这种弹簧的装置和时计 |
DE60333191D1 (de) * | 2003-09-26 | 2010-08-12 | Asulab Sa | Spiralfeder-Unruh-Resonator mit Thermokompensation |
DE06405114T1 (de) | 2006-03-15 | 2008-04-24 | Doniar S.A. | LIGA Verfahren zur Herstellung einer einzel- oder mehrlagigen metallischen Struktur und damit hergestellte Struktur |
EP2105807B1 (de) * | 2008-03-28 | 2015-12-02 | Montres Breguet SA | Monoblockspirale zur Erhöhung der Kurve und ihr Herstellungsverfahren |
EP2184653A1 (de) * | 2008-11-06 | 2010-05-12 | Montres Breguet S.A. | Spiralfeder mit Endkurvenerhöhung aus mikro-bearbeitbarem Material |
WO2011069273A1 (fr) * | 2009-12-09 | 2011-06-16 | Rolex S.A. | Procédé de fabrication d'un ressort pour pièce d'horlogerie |
EP2390732A1 (de) * | 2010-05-27 | 2011-11-30 | Association Suisse pour la Recherche Horlogère | Zugfeder für Federhaus |
CH704237B1 (fr) | 2010-12-17 | 2015-03-13 | Manuf Et Fabrique De Montres Et Chronomètres Ulysse Nardin Le Locle Sa | Ressort de barillet et barillet contenant un tel ressort. |
EP2657794B1 (de) * | 2012-04-25 | 2017-02-01 | ETA SA Manufacture Horlogère Suisse | Federwelle und Zugfeder |
EP2680090A1 (de) * | 2012-06-28 | 2014-01-01 | Nivarox-FAR S.A. | Triebfeder für Uhr |
EP2743781B1 (de) * | 2012-12-11 | 2019-06-12 | Nivarox-FAR S.A. | Montagevorrichtung zum Verriegeln eines Verbundsystems |
-
2013
- 2013-05-30 WO PCT/EP2013/061168 patent/WO2014001017A1/fr active Application Filing
- 2013-05-30 EP EP13725709.3A patent/EP2867734B1/de active Active
- 2013-05-30 RU RU2015102621A patent/RU2634792C2/ru active
- 2013-05-30 JP JP2015516548A patent/JP5961755B2/ja active Active
- 2013-05-30 US US14/408,752 patent/US9329571B2/en active Active
- 2013-05-30 CN CN201380034398.4A patent/CN104412175B/zh active Active
-
2015
- 2015-09-10 HK HK15108820.2A patent/HK1208270A1/xx unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2014001017A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN104412175B (zh) | 2017-05-17 |
US9329571B2 (en) | 2016-05-03 |
RU2015102621A (ru) | 2016-08-20 |
CN104412175A (zh) | 2015-03-11 |
JP5961755B2 (ja) | 2016-08-02 |
RU2634792C2 (ru) | 2017-11-03 |
JP2015519578A (ja) | 2015-07-09 |
HK1208270A1 (en) | 2016-02-26 |
US20150277380A1 (en) | 2015-10-01 |
EP2867734B1 (de) | 2016-05-04 |
WO2014001017A1 (fr) | 2014-01-03 |
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