EP4202569A1 - Armbanduhrengehäuse mit drehbarem aussenring - Google Patents

Armbanduhrengehäuse mit drehbarem aussenring Download PDF

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Publication number
EP4202569A1
EP4202569A1 EP21216432.1A EP21216432A EP4202569A1 EP 4202569 A1 EP4202569 A1 EP 4202569A1 EP 21216432 A EP21216432 A EP 21216432A EP 4202569 A1 EP4202569 A1 EP 4202569A1
Authority
EP
European Patent Office
Prior art keywords
watch case
alloy
rotating bezel
connecting spring
spring
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.)
Pending
Application number
EP21216432.1A
Other languages
English (en)
French (fr)
Inventor
René Piguet
Marc Stranczl
Adrien Chappuis
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.)
Montres Breguet SA
Original Assignee
Montres Breguet 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
Application filed by Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP21216432.1A priority Critical patent/EP4202569A1/de
Priority to JP2022165230A priority patent/JP7458456B2/ja
Priority to US17/973,343 priority patent/US20230195037A1/en
Priority to CN202211646654.2A priority patent/CN116300368A/zh
Publication of EP4202569A1 publication Critical patent/EP4202569A1/de
Pending 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/28—Adjustable guide marks or pointers for indicating determined points of time
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/28—Adjustable guide marks or pointers for indicating determined points of time
    • G04B19/283—Adjustable guide marks or pointers for indicating determined points of time on rotatable rings, i.e. bezel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C14/00—Alloys based on titanium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/007—Alloys based on nickel or cobalt with a light metal (alkali metal Li, Na, K, Rb, Cs; earth alkali metal Be, Mg, Ca, Sr, Ba, Al Ga, Ge, Ti) or B, Si, Zr, Hf, Sc, Y, lanthanides, actinides, as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/01—Alloys based on copper with aluminium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/04—Alloys based on copper with zinc as the next major constituent
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/28—Adjustable guide marks or pointers for indicating determined points of time
    • G04B19/283—Adjustable guide marks or pointers for indicating determined points of time on rotatable rings, i.e. bezel
    • G04B19/286—Adjustable guide marks or pointers for indicating determined points of time on rotatable rings, i.e. bezel with locking means to prevent undesired rotations in both directions
    • 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
    • G04B37/00—Cases
    • G04B37/04—Mounting the clockwork in the case; Shock absorbing mountings

Definitions

  • the present invention relates to a watch case fitted with a rotating bezel, and more specifically to the nature of the spring linking the middle part to the rotating bezel.
  • This spring is formed from a generally metallic wire which is subjected to deformations during its assembly within the grooves of the middle part and of the rotating bezel. These deformations can be significant and lead to plastic deformation of the wire.
  • the figures 3 to 5 schematize the assembly process of the bezel 1 and the spring 2 on the caseband 3.
  • the spring 2 is positioned against the inclined plane 3c of the middle part 3 and is housed in the groove 8 of the bezel 1.
  • the spring is unconstrained.
  • the spring 2 is positioned against the vertical wall 3b following the inclined wall 3c of the caseband 3. It is then strongly constrained radially before releasing when it is housed in the grooves 7.8 of the caseband 3 and the bezel 1 provided for its operation ( figure 5 ).
  • the displacements applied and the corresponding stresses in the sequence of the figure 4 vary from room to room depending on manufacturing tolerances.
  • this stress is critical because it plastically deforms the spring. This implies that the repeatability of the friction torque during the rotation of the bezel and the force required for dismantling are variable from one part to another. These plastic deformations modify the friction torque between the bezel and the middle and therefore the sensory feeling perceived by the customer, which is a major disadvantage.
  • the object of the invention is to overcome the aforementioned disadvantage by proposing a spring made of a material which can be subjected to significant stresses without plastically deforming. More specifically, the spring is made of a shape memory alloy exploited for its superelastic properties. These materials allow a large displacement range without residual plastic deformation thanks to a phase transformation phenomenon. As a result, despite the large stresses and the large displacements during the insertion of the spring during assembly, the torque perceived by the user is more repeatable and independent of the geometry during the insertion of the spring.
  • the invention thus makes it possible to reduce the dimensions of the bezels by groove geometries which would be critical with traditional constructions and materials while maintaining a stable felt torque.
  • the present invention relates to a watch case comprising a rotating bezel, a middle part and a connecting spring between the rotating bezel and the middle part, said connecting spring being housed in a first groove made in an outer wall of the middle part and in a second groove made in an inner wall of the rotating bezel, said first and second grooves being arranged preferably facing each other, the watch case being characterized in that the connecting spring is made in a shape memory alloy.
  • the shape memory alloy is an alloy based on copper, an alloy based on nickel and titanium, an alloy based on nickel or an alloy based on iron.
  • the watch case 6 comprises a rotating bezel 1 mounted on the middle part 3 ( fig.1 ).
  • the caseband 3 and the rotating bezel 1 respectively comprise a groove 7 and a groove 8.
  • the groove 7 is made in the outer wall 3a of the caseband 3 and the groove 8 is made in the inner wall 1a of the rotating bezel 1.
  • grooves 7 and 8 are preferably arranged facing each other and serve as a housing for the connecting spring 2 according to the invention. Thanks to this spring 2, the rotating bezel 1 is pressed downwards against a shoulder 3d of the middle part 3.
  • the connecting spring may have a polygonal shape.
  • the connecting spring may have an annular shape with circular protrusions 2a arranged alternately on the inner face and on the outer face of the ring. Other shapes are also possible without departing from the scope of the invention.
  • the connecting spring is made of a shape memory alloy.
  • FIG 6 illustrates the superelastic behavior of a shape memory alloy which exhibits an austenitic structure at room temperature which transforms into martensite under the application of a stress, which makes it possible to deform the material reversibly by several percent.
  • the tensile curve first exhibits linear elastic behavior up to a critical stress where the martensitic transformation induces superelastic behavior with increasing strain under near constant stress. This is the plateau that we observe at the figure 6 . As soon as the stress is released, the reverse transformation from martensite to austenite takes place and the alloy returns to its original size.
  • the shape memory alloy is an alloy based on nickel and titanium.
  • This alloy is completely biocompatible and highly resistant to corrosion.
  • the nickel-titanium base alloy consists of nickel with a weight percentage between 52.5 and 63%, titanium with a weight percentage between 36.5 and 47% and possible impurities with a lower or equal percentage. at 0.5%.
  • it could be an alloy comprising 55.8% titanium, 44% nickel and any impurities with a content less than or equal to 0.2% by weight.
  • iron-based alloy for example an Fe-Mn-Si alloy. It could also be a titanium-free nickel-based alloy.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Springs (AREA)
EP21216432.1A 2021-12-21 2021-12-21 Armbanduhrengehäuse mit drehbarem aussenring Pending EP4202569A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP21216432.1A EP4202569A1 (de) 2021-12-21 2021-12-21 Armbanduhrengehäuse mit drehbarem aussenring
JP2022165230A JP7458456B2 (ja) 2021-12-21 2022-10-14 回転ベゼルを有する腕時計ケース
US17/973,343 US20230195037A1 (en) 2021-12-21 2022-10-25 Watch case with rotating bezel
CN202211646654.2A CN116300368A (zh) 2021-12-21 2022-12-21 带有旋转表圈的表壳

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21216432.1A EP4202569A1 (de) 2021-12-21 2021-12-21 Armbanduhrengehäuse mit drehbarem aussenring

Publications (1)

Publication Number Publication Date
EP4202569A1 true EP4202569A1 (de) 2023-06-28

Family

ID=78957826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21216432.1A Pending EP4202569A1 (de) 2021-12-21 2021-12-21 Armbanduhrengehäuse mit drehbarem aussenring

Country Status (4)

Country Link
US (1) US20230195037A1 (de)
EP (1) EP4202569A1 (de)
JP (1) JP7458456B2 (de)
CN (1) CN116300368A (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3662537A (en) * 1968-12-10 1972-05-16 Suwa Seikosha Kk Construction of rotating bezel section for watch cases
US20130329536A1 (en) * 2012-06-06 2013-12-12 Omega Sa Rotating bezel system
CH715239B1 (fr) * 2018-08-08 2021-11-30 Omega Sa Système de lunette tournante annulaire comprenant un anneau ressort muni d'au moins deux ergots.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3620444B2 (ja) * 2000-12-11 2005-02-16 セイコーエプソン株式会社 時計
JP2003270365A (ja) * 2002-03-14 2003-09-25 Seiko Epson Corp 時 計
JP4617828B2 (ja) * 2004-10-29 2011-01-26 カシオ計算機株式会社 ケース構造
EP2881804B1 (de) * 2013-12-09 2017-08-02 Montres Breguet S.A. Spiralfeder-spiralklötzchen-einheit für uhrwerk
EP3483667A1 (de) * 2017-11-13 2019-05-15 Rolex Sa Befestigungssystem eines uhrwerks in einem armbanduhrengehäuse
EP3608730B1 (de) * 2018-08-08 2021-05-05 Omega SA System eines drehbaren aussenrings einer armbanduhr, das einen federring umfasst, der mit mindestens zwei zentrierstiften ausgestattet ist

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3662537A (en) * 1968-12-10 1972-05-16 Suwa Seikosha Kk Construction of rotating bezel section for watch cases
US20130329536A1 (en) * 2012-06-06 2013-12-12 Omega Sa Rotating bezel system
CH715239B1 (fr) * 2018-08-08 2021-11-30 Omega Sa Système de lunette tournante annulaire comprenant un anneau ressort muni d'au moins deux ergots.

Also Published As

Publication number Publication date
JP7458456B2 (ja) 2024-03-29
US20230195037A1 (en) 2023-06-22
CN116300368A (zh) 2023-06-23
JP2023092456A (ja) 2023-07-03

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