EP2746866A1 - Federgehäuse einer Uhr - Google Patents

Federgehäuse einer Uhr Download PDF

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Publication number
EP2746866A1
EP2746866A1 EP12197742.5A EP12197742A EP2746866A1 EP 2746866 A1 EP2746866 A1 EP 2746866A1 EP 12197742 A EP12197742 A EP 12197742A EP 2746866 A1 EP2746866 A1 EP 2746866A1
Authority
EP
European Patent Office
Prior art keywords
drum
bridge
spring
ratchet
shaft
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
EP12197742.5A
Other languages
English (en)
French (fr)
Other versions
EP2746866B1 (de
Inventor
Laurent Kaelin
Arthur Queval
Martin Vautherot
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 EP12197742.5A priority Critical patent/EP2746866B1/de
Priority to US14/104,199 priority patent/US8894275B2/en
Priority to RU2013156066A priority patent/RU2640757C2/ru
Priority to CN201310699729.8A priority patent/CN103869675B/zh
Priority to JP2013260872A priority patent/JP5687756B2/ja
Priority to CN201320838991.1U priority patent/CN203849561U/zh
Publication of EP2746866A1 publication Critical patent/EP2746866A1/de
Priority to HK14112572.5A priority patent/HK1199115A1/xx
Application granted granted Critical
Publication of EP2746866B1 publication Critical patent/EP2746866B1/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
    • 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

Definitions

  • the invention relates to a watch cylinder for pivotally mounting between a plate and a bridge and comprising at least one spring housed between a pivoting drum and a cover and hooked between, at its outer end said drum and at its inner end a shaft, which is integral in pivoting with a ratchet around a pivot axis.
  • the invention also relates to a watch movement, comprising at least one plate and a bridge and such a cylinder.
  • the invention also relates to a watch comprising such a movement.
  • the invention relates to the field of watch mechanisms, and more particularly the energy storage mechanisms, the engine barrel type, barrel striking, or the like.
  • a solution consists of in a decrease in the diameter of the barrel shaft and the associated core, so as to increase the space available in the drum for the spring.
  • the ratio of the bead radius to the thickness of the spring is usually between 10 and 20, and the invention proposes to lower this ratio below 10, and preferably in the range between 5 and 10.
  • the dimensioning should not be done lightly, indeed a risk of breakage exists if the bung diameter is too small.
  • a ratchet is mounted axially on a barrel axis or on a bung, via a square, the ratchet being generally fixed by an axial screw.
  • the size of this screw and that of the square thus condition a minimum diameter of a pivoting surface.
  • a Shoulder joined to this pivoting surface limits axial fretting of the shaft or the bung relative to a plate or a bridge carrying a stone or the like.
  • the invention proposes to improve the design of barrels designed for a large power reserve, giving them good rigidity, particularly at the ratchet, while retaining a reduced number of components, and an acceptable machining cost, or, preferably, more economical than on known barrels.
  • the invention thus relates to a watch cylinder for pivotally mounting between a plate and a bridge and comprising at least one spring housed between a pivoting drum and a ratchet and hung between, at its outer end said drum and at its inner end a shaft which is integral in pivoting with said ratchet about a pivot axis, characterized in that said barrel comprises a monoblock sub-assembly coaxial with said shaft and grouping, around a core, said shaft and said ratchet which is situated in the vicinity immediate of said platen.
  • said drum has an upper surface whose travel is limited by a lower surface of said bridge or a stone that includes said bridge, said drum pivots, at a bore therein, on an upper bearing surface of said shaft of said one-piece subassembly, said ratchet is between, on the one hand, a lower end surface of said drum which is situated on the opposite side to said upper surface with respect to said spring enclosed in said drum, and on the other hand a lower shoulder that comprises said monobloc subassembly at said core, which lower shoulder limits the stroke of said monobloc subassembly relative to said plate or a stone that includes said plate, at a level of boring said platen or a stone that includes said platen and wherein bore rotates a lower bearing of said monobloc subassembly.
  • said one-piece subassembly is pivoted at an upper bearing surface in a bore of said bridge or a stone that includes said bridge.
  • said one-piece subassembly is pivoted at an upper bearing surface in a bore that comprises said drum at an end gun whose external bearing pivots in a bore of said bridge or of a stone that includes said bridge.
  • said one-piece subassembly comprises, at said shaft, a receiving surface of said spring which is of diameter greater than said upper end surface which extends it, on the opposite side to said ratchet, and said shaft comprises, between said receiving surface and said upper surface, a shoulder arranged to cooperate in abutment abutment with an internal surface of said drum, which internal surface is in the vicinity, on the opposite side of a same flange of said drum, of an upper surface of said drum whose travel is limited by a lower surface of said bridge or a stone that includes said bridge.
  • said shaft comprises a bearing which is of diameter less than that of said core, and carries said spring, or at said bearing surface on which said spring is immobilized by friction or welded, or on a hook that includes said shaft around said scope, and said core comprises, in the vicinity of said ratchet, a pivoting surface in a bore of said plate or a stone that includes said plate.
  • the frustum of said drum is limited in lower bearing relative to said bridge, by an upper surface of said drum which is limited by a lower surface of said bridge or a stone that includes said bridge, the frustum of said drum is limited in upper support relative to said ratchet, by a lower end surface of said drum which is situated on the opposite side to said upper surface with respect to said spring enclosed in said drum, said lower end surface which is limited by an upper surface of said ratchet of said monoblock subassembly, the frog of said ratchet is limited in upper support relative to said plate, by a lower surface said monobloc subset which is limited by an upper surface of said platen or a stone that includes said platen.
  • said spring is made of a cobalt-nickel-chromium-based multiphase alloy comprising from 44 to 46% of cobalt, from 20 to 22% of nickel and from 17 to 19% of chromium. , from 4 to 6% of iron, from 3 to 5% of tungsten, from 3 to 5% of molybdenum, from 0 to 2% of titanium, from 0 to 1% of beryllium, and from Young's modulus of between 200 and 240 GPa and a shear modulus of between 80 and 100 GPa, in said spring has a width / thickness ratio of between 3 and 23, and the ratio of the maximum radius of a bearing surface of the spring of said shaft and the the thickness of said spring is between 3 and 9.
  • the invention also relates to a watch movement, comprising at least one plate and a bridge and such a cylinder.
  • the invention also relates to a watch comprising such a movement.
  • the invention relates to the field of watch mechanisms, and more particularly the energy storage mechanisms, the engine barrel type, barrel striking, or the like.
  • the invention thus relates to a watch cylinder 1 for pivotally mounting between a plate 9 and a bridge 5, and comprising at least one spring 7.
  • This spring 7 is housed between a pivoting drum 6 and a ratchet 2, and is hung between , to his outer end the drum 6 and at its inner end a shaft 3.
  • the shaft 3 is pivotally integral with a ratchet 2 about a pivot axis D.
  • the barrel 1 comprises a monobloc subassembly 10 coaxial with the shaft 3 and comprising, around a core 4, at least the ratchet 2 and the shaft 3.
  • the ratchet 2 is located in the immediate vicinity of the plate 9, it constitutes a lid closing the chamber defined by the drum 6 around the spring 7.
  • This monobloc subassembly 10 is pivoted at an upper bearing surface 13 in a bore 51 of the bridge 5 or a stone 52 that includes the bridge 5.
  • the monobloc subassembly 10 does not have an upper shoulder.
  • the monobloc subassembly 10 has an upper shoulder 15 whose travel is limited by a lower surface 65 of the drum 6.
  • the ratchet 2 is comprised between on the one hand a bearing 31 of the shaft 3, at which the spring 7 is fixed on the shaft 3, and on the other hand a lower shoulder 22 that comprises the monobloc subassembly This lower shoulder 22 limits the stroke of the one-piece subassembly 10, resting on an upper surface 93 of the plate 9 or a stone 92 that comprises the plate 9.
  • the drum 6 has an upper surface 61 whose travel is limited by a lower surface 53 of the bridge 5 or a stone 52 that includes the bridge 5.
  • the drum 6 pivots, at a bore 62 that it comprises, on an upper bearing 13 of the shaft 3 of the monobloc subassembly 10.
  • the ratchet 2 is disposed between, on the one hand, a lower end surface 63 of the drum 6 which is situated on the opposite side to this upper surface 61 with respect to the spring 7 enclosed in said drum 6, and on the other hand this shoulder. lower 22 that includes the monobloc subassembly 10 at the core 4.
  • the plate 9, or the stone 92 that it comprises, comprises a bore 91 in which pivots a lower bearing surface 41 of the monobloc subassembly 10.
  • the monoblock subassembly 10 is pivoted at an upper bearing surface 13 in a bore 62 that comprises the drum 6 at the level of an end gun whose external bearing surface 64 pivots in a bore 51 of the bridge 5 or a stone 52 that the bridge 5 comprises.
  • the one-piece subassembly 10 comprises, at the level of the shaft 3, a bearing surface 31 for receiving the spring 7 which is greater in diameter than the upper end surface 13 which extends it, on the opposite side to the ratchet 2. And this shaft 3 comprises, between this reception surface 31 and the upper surface 13, a shoulder 15 arranged to cooperate in abutment abutment with the inner surface 65 of the drum 6.
  • This inner surface 65 is in the vicinity, on the opposite side of a same flange 66 of the drum 6, an upper surface 61 of the drum 6, whose stroke is limited by a lower surface 53 of the bridge 5 or a stone 52 that includes the bridge 5.
  • the shaft 3 comprises a bearing surface 31 which is preferably of smaller diameter than that of the core 4 at a lower bearing surface 41 of the monobloc subassembly 10, and carries the spring 7, or at this bearing surface 31, on which the spring 7 is immobilized by friction or welded, or on a hook 32 that includes the shaft 3 around the bearing 31.
  • the core 4 comprises, in the vicinity of the ratchet 2, a pivoting bearing surface 41 in a bore 91 of the plate 9 or a stone 92 that includes the plate 9.
  • the frolicking of the drum 6 is limited in lower bearing relative to the bridge 5, by an upper surface 61 of the drum 6 which is limited by a lower surface 53 of the bridge 5 or a stone 52 that includes the bridge 5.
  • the frolicking of the drum 6 is limited in upper support relative to the ratchet 2, by a lower end surface 63 of the drum 6 which is located on the opposite side to the upper surface 61 with respect to the spring 7 enclosed in the drum 6.
  • This lower end surface 63 is bounded by an upper surface 21 of the ratchet 2 of the monobloc subassembly 10.
  • the fretting of the ratchet 2 is limited in upper support relative to the plate 9, by a lower surface 22 of the monobloc subassembly 10 which is limited by an upper surface 93 of the plate 9 or a stone 91 that includes the platinum.
  • the first variant of the figure 1 is advantageous because the monobloc subassembly 10 combines the functions of cover, ratchet, shaft, and core, without machining complexity other than the hook 32 for hooking the spring 7. There are three times of frolic.
  • the upper surface 21 of the ratchet 2, intended for cooperating with the lower surface 63 of the drum 6 may advantageously be subjected to a teflon coating, "rilsan®", or the like, to reduce the frictional torque between the drum 6 and the ratchet 2.
  • the advantage of this construction is that there is no limit to the diameter of the core.
  • the diameter of the core is limited by the diameter of the pivoting range in the bridge 5.
  • the motor spring can be made of different materials: carbon steel, stainless steel, "Nivaflex®", silicon, DLC, quartz, glass, or similar.
  • the spring 7 is made of a cobalt-nickel-chromium-based multiphase alloy comprising from 44 to 46% of cobalt, from 20 to 22% of nickel, from 17 to 19% of chromium, from 4 to 6% of iron, 3 to 5% of tungsten, 3 to 5% of molybdenum, 0 to 2% of titanium, 0 to 1% of beryllium, and Young's modulus of between 200 and 240 GPa and a shear modulus between 80 and 100 GPa.
  • This spring 7 preferably has a width / thickness ratio of between 3 and 23, and more particularly between 9 and 21.
  • the maximum radius of the bearing 31 of the shaft 3 (without taking into account the possible extra thickness specific to a hook 32), made of steel or stainless steel, for example hardened stainless steel 4C27A (also named according to different standards 1.4197, ASTM 420F, or DIN X22 CrMoNiS 13 1), relative to the pivot axis D is less than nine times the maximum thickness of the spring 7.
  • the embodiments illustrated make it possible to obtain a ratio between the maximum radius the bearing 31 of the shaft 3 and the thickness of the spring 7 between 3 and 9, and preferably between 4 and 6, preferably close to five.
  • the invention also relates to a watch movement 100 comprising at least one plate 9 and a bridge 5 and such a cylinder 1.
  • the invention also relates to a watch 200 comprising such a movement 100.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Adornments (AREA)
  • Springs (AREA)
  • Micromachines (AREA)
EP12197742.5A 2012-12-18 2012-12-18 Federgehäuse einer Uhr Active EP2746866B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP12197742.5A EP2746866B1 (de) 2012-12-18 2012-12-18 Federgehäuse einer Uhr
US14/104,199 US8894275B2 (en) 2012-12-18 2013-12-12 Timepiece barrel
RU2013156066A RU2640757C2 (ru) 2012-12-18 2013-12-17 Обойма часов
JP2013260872A JP5687756B2 (ja) 2012-12-18 2013-12-18 時計の香箱
CN201310699729.8A CN103869675B (zh) 2012-12-18 2013-12-18 用于钟表的发条盒
CN201320838991.1U CN203849561U (zh) 2012-12-18 2013-12-18 发条盒、包括该发条盒的钟表机芯和包括该机芯的手表
HK14112572.5A HK1199115A1 (en) 2012-12-18 2014-12-15 Timepiece barrel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12197742.5A EP2746866B1 (de) 2012-12-18 2012-12-18 Federgehäuse einer Uhr

Publications (2)

Publication Number Publication Date
EP2746866A1 true EP2746866A1 (de) 2014-06-25
EP2746866B1 EP2746866B1 (de) 2016-05-18

Family

ID=47552770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12197742.5A Active EP2746866B1 (de) 2012-12-18 2012-12-18 Federgehäuse einer Uhr

Country Status (6)

Country Link
US (1) US8894275B2 (de)
EP (1) EP2746866B1 (de)
JP (1) JP5687756B2 (de)
CN (2) CN203849561U (de)
HK (1) HK1199115A1 (de)
RU (1) RU2640757C2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2746866B1 (de) * 2012-12-18 2016-05-18 ETA SA Manufacture Horlogère Suisse Federgehäuse einer Uhr
EP3974913A1 (de) * 2014-06-30 2022-03-30 Rolex Sa Federgehäuse für uhr

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US168581A (en) * 1875-10-11 Improvement in barrel-arbors for watches
CH15286A (fr) * 1897-09-15 1898-04-30 Giuseppe Danasino Mouvement de montre à ressort moteur perfectionné
US1561673A (en) * 1924-04-03 1925-11-17 Ulery Clarence Everett Clock arbor or shaft
GB647819A (en) * 1944-12-12 1950-12-20 Elgin Nat Watch Co Cobalt chromium nickel base alloy
FR1034443A (fr) * 1950-04-01 1953-07-23 Ressort d'horlogerie inoxydable présentant une grande résistance à la fatigue et procédé pour sa fabrication

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US978613A (en) * 1909-07-31 1910-12-13 Keystone Watch Case Company Watch-barrel.
US1535684A (en) * 1924-05-02 1925-04-28 New Haven Clock Co Automobile clock
CH596590B5 (de) * 1975-01-23 1978-03-15 Pforzheimer Uhren Rohwerke
US20020191493A1 (en) * 2000-07-11 2002-12-19 Tatsuo Hara Spring, drive mechanism, device and timepiece using the spring
CH704738B1 (fr) * 2007-11-02 2012-10-15 Bernard Jouvenot Pièce d'horlogerie comportant un mécanisme de chronographe et un mécanisme de remontage automatique.
CH699988A2 (fr) * 2008-11-28 2010-05-31 Patek Philippe Sa Geneve Organe moteur pour mouvement horloger.
EP2746866B1 (de) * 2012-12-18 2016-05-18 ETA SA Manufacture Horlogère Suisse Federgehäuse einer Uhr

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US168581A (en) * 1875-10-11 Improvement in barrel-arbors for watches
CH15286A (fr) * 1897-09-15 1898-04-30 Giuseppe Danasino Mouvement de montre à ressort moteur perfectionné
US1561673A (en) * 1924-04-03 1925-11-17 Ulery Clarence Everett Clock arbor or shaft
GB647819A (en) * 1944-12-12 1950-12-20 Elgin Nat Watch Co Cobalt chromium nickel base alloy
FR1034443A (fr) * 1950-04-01 1953-07-23 Ressort d'horlogerie inoxydable présentant une grande résistance à la fatigue et procédé pour sa fabrication

Also Published As

Publication number Publication date
RU2013156066A (ru) 2015-06-27
EP2746866B1 (de) 2016-05-18
JP2014119462A (ja) 2014-06-30
CN103869675B (zh) 2017-07-28
US8894275B2 (en) 2014-11-25
CN103869675A (zh) 2014-06-18
CN203849561U (zh) 2014-09-24
US20140169141A1 (en) 2014-06-19
HK1199115A1 (en) 2015-06-19
JP5687756B2 (ja) 2015-03-18
RU2640757C2 (ru) 2018-01-11

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