EP2746870B1 - Abnehmbares Kronrad - Google Patents

Abnehmbares Kronrad Download PDF

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Publication number
EP2746870B1
EP2746870B1 EP12197843.1A EP12197843A EP2746870B1 EP 2746870 B1 EP2746870 B1 EP 2746870B1 EP 12197843 A EP12197843 A EP 12197843A EP 2746870 B1 EP2746870 B1 EP 2746870B1
Authority
EP
European Patent Office
Prior art keywords
crown
deck ring
ring
removable deck
timepiece
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.)
Active
Application number
EP12197843.1A
Other languages
English (en)
French (fr)
Other versions
EP2746870A1 (de
Inventor
Sébastien Briswalter
Manuela Zingg
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.)
Meco SA
Original Assignee
Meco 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 Meco SA filed Critical Meco SA
Priority to EP12197843.1A priority Critical patent/EP2746870B1/de
Priority to CH02846/12A priority patent/CH707293B1/fr
Priority to TW102144663A priority patent/TWI612402B/zh
Priority to US14/105,516 priority patent/US9229431B2/en
Priority to JP2013260873A priority patent/JP5715679B2/ja
Priority to CN201310698263.XA priority patent/CN103869682B/zh
Publication of EP2746870A1 publication Critical patent/EP2746870A1/de
Priority to HK14112569.0A priority patent/HK1199112A1/xx
Application granted granted Critical
Publication of EP2746870B1 publication Critical patent/EP2746870B1/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
    • G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
    • G04B3/06—Keys or the like with means preventing overwinding
    • 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
    • G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
    • G04B3/04—Rigidly-mounted keys, knobs or crowns
    • G04B3/041—Construction of crowns for rotating movement; connection with the winding stem; winding stems
    • 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
    • G04B37/08—Hermetic sealing of openings, joints, passages or slits
    • G04B37/10—Hermetic sealing of openings, joints, passages or slits of winding stems
    • 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
    • G04B37/08—Hermetic sealing of openings, joints, passages or slits
    • G04B37/10—Hermetic sealing of openings, joints, passages or slits of winding stems
    • G04B37/103—Hermetic sealing of openings, joints, passages or slits of winding stems by screwing the crown onto the case
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49579—Watch or clock making
    • Y10T29/49586—Watch or clock making having crown, stem, or pendent

Definitions

  • the present invention relates to a removable ring for a timepiece, in particular to change a seal.
  • Crowns are commonly used as adjusters for mechanical watches. Mounted on a tube driven or screwed into the middle of the watch case, they are assembled at the end of a winding rod or control, and can take several different axial positions in which they can perform different types of functions, such as winding the watch barrel, setting the time, setting the date, etc.
  • Screwed crowns are commonly used to equip watches in order to improve the sealing of these at their winding or control rod.
  • This type of crown has the particularity of having to take a position unscrewed to be able to be actuated, and in which the axial position of the crown can be modified to determine an adjustment mode.
  • the ring In the screwed-in position, the ring is locked on a tube fixed in the caseband which preferably has a bulge at the base of its protruding part out of the middle part in order to compress a seal, thereby improving the tightness of the watch.
  • the screwed position is therefore that which corresponds to the normal position when the watch is worn and which has the best sealing properties, especially adapted for use in the context of aquatic activities such as scuba diving.
  • crowns whether screwed and orientable or not, generally include a hood formed by a cover on the upper side of which can be affixed a mark or logo, and a side skirt inside which comes fit the fixing tube.
  • a hood formed by a cover on the upper side of which can be affixed a mark or logo, and a side skirt inside which comes fit the fixing tube.
  • one or more seals are provided at the lower end of the skirt, and are compressed radially between the outer surface of the tube and the skirt, and covered thanks to a ring set or hunted.
  • cover rings which serve to maintain the seal in particular during handling of the crown, are sometimes also commonly called "deckrings".
  • a disadvantage of such crowns is that it is sometimes not possible to replace a worn gasket when it is not accessible laterally during disassembly of the crown due to the permanent attachment of the deckring on the face lower skirt of the crown. Therefore, during an after-sales service for example, it may be necessary to replace the entire crown when its sealing properties deteriorate over time, which is very expensive.
  • the document EP1701225 describes a crown for a timepiece comprising a cover formed of a lid integral with a side skirt, the ring also comprising a removable deckring, covering an O-ring.
  • the document EP0655664 proposes an alternative solution to the deckrings for maintaining a seal of a pressed thrust ring against a guide tube, by using an open elastic fastening ring engaged in a groove on the underside of the crown.
  • open elastic rings also known as circlips
  • abutment members for assembling and holding components in grooves around an axis for larger workpieces, where they can be easily handled.
  • pliers engaging in holes at their ends for assembly and disassembly.
  • the size is very small, at most a few millimeters hardly, a crown for a timepiece, makes handling very difficult just mounting, and particularly inconvenient for possible subsequent disassembly.
  • the particular shape of the circlip requires the development of a groove at the lower end of the skirt of the crown with a spout forming an axial retaining surface, as is the case specifically in the context of the invention disclosed by this patent document EP0655664 , intended to avoid any accidental wrenching. This complicates the machining of the crown and therefore more expensive to manufacture.
  • the present invention aims to overcome the drawbacks of the aforementioned prior art by providing a conventional ring of simple and economical construction, which can be mounted without requiring tedious operation crimping a ring and / or manipulation of a circlip, and more easily disassembled, without however its sealing properties are altered.
  • the subject of the invention is a ring as defined in independent claim 1.
  • the invention also relates to a method for mounting and dismounting such a deckring, the method being defined in the independent claim 7.
  • An advantage of the proposed solution is to require almost no structural modification of a traditional crown, or almost all of its components to ensure equivalent sealing and axial retention properties, while now allowing the change for example d a worn seal when the latter is not accessible laterally.
  • Another advantage of the proposed solution is to allow the introduction and faster replacement of seals on a crown.
  • the figure 1 shows a circlip C known from the prior art, which consists of an open elastic ring whose two ends are contiguous to each other in mounted position to form a circular inner periphery conforming to the shape of a cylindrical axis around which it is intended to be mounted.
  • O openings are provided in the ears at its ends to be grasped and manipulated.
  • the figure 2 shows a sagittal half-sectional view along the axis of rotation AA of a conventional screwed crown 1, on which we can distinguish a logo L, here corresponding to an "Omega", arranged on the external face 113 of the cover 112 of its cover 11. It can also be seen, on the outer periphery of the cover, a toothing D which aims to improve the grip of the crown 1 by the user during use.
  • the ring 1 is shown in the screwed position on a threaded tube 8, intended to be itself screwed into a middle of a watch case - not shown - by means of a first thread 81, while a thread 82 cooperates with the thread 21 of a central barrel 2 of tubular form.
  • the cover 11 is formed by a cover 112 and an axial skirt 111, which mutually define a central opening 115 inside the ring 1 - referenced only on the figure 3 described below for reasons of legibility - and in which is disposed the end of the threaded tube 8 integral with the middle part, but also the central barrel 2.
  • the central barrel 2 is secured to the cover 11 , but in a variant it could consist of an intermediate element for managing the angular orientation of the cover 11 relative to the middle part of the watch.
  • the piston 7 housed inside the central barrel 2 is integral with a rod (not shown, but conventionally mounted on the lower end 72 of the piston 9 via the tapping 71 in a blind hole) interacting with the movement ; it can slide against a spring 3 abutting on an inner surface 114 of the cover 112 of the cover 11, and allows in particular to bring out the cover 11 of the middle part when unscrewing the ring 1 of the tube 2 during its use for setting a function (eg time reset, date setting or manual winding of the movement).
  • a function eg time reset, date setting or manual winding of the movement
  • the seal 5 is supercharged on a bulge 83 of the tube 8, a thickness corresponding to the axial spacing e between the non-removable deckring 6 and the central barrel 2, so that the sealing properties are the best possible when the crown is in the screwed position.
  • the non-removable deckring 6 is housed in a groove 1160 formed in the lower face 116 of the ring so that it is flush with the surface of the lower face 116 of the ring 1.
  • the figure 3 shows a ring 1 according to the invention whose overall structure is identical to that illustrated by the figure 2 , but this time in the disassembled position of the tube 8, and in which the deckring is removable (reference 60), that is to say, it can be mounted on the cover 11 and then removed later. All references are identical to those of the figure 2 , except those relating to the tube 8 which is no longer shown, and the groove 1160 which has been replaced by a shoulder 1161, that is to say having no axial retaining surface.
  • the seal 5 is now decompressed; it can be seen that it is toric, of torus diameter t , and there is also the central opening 115 inside the ring in which is housed in particular the central barrel 2.
  • the removable deckring 60 can be mounted to the cover 11 of the crown 1 by a conventional driving operation or oval-type deformation.
  • the walls of the crown are deckring may be cylindrical or tapered.
  • the removable deckring 60 is made of a shape memory material and it is then possible in this case to deform beforehand to let it resume its original shape once placed on the shoulder 1161 of the underside of the crown 1, which facilitates the deckrin assembly operations, and makes it removable elsewhere without may mutilate elements or parts in its vicinity.
  • an alloy is preferably chosen for which the transition temperature is located largely outside the service temperatures of the watch, between about -20 and +50 degrees Celsius, in order to avoid inadvertent disassembly of the removable deckring 60 under extreme conditions of use.
  • the material is chosen as Nitinol (50% nickel and 50% titanium), which has superelasticity properties, that is to say reversible deformation, around -30 degrees.
  • the mounting operation can therefore consist in cooling the deckring by applying an icing spray, for example at -55 degrees, to bring it to a temperature at which it supports a deformation rate greater than 8%.
  • the removable deckring 60 By applying constraints on opposite points of a diameter of the removable deckring 60, for example by means of a clamp, the removable deckring 60 is ovalized slightly and places it in its housing at the level of the underside of the hood 11 ; it can thus resume its original circular shape after about ten seconds at room temperature to maintain the seal in place.
  • At least one first gripping zone 1162 can be provided at the lower face 116 of the ring 1, referenced on the figures 2 and 4 .
  • a plurality of first gripping areas 1162 are provided, as is visible on the figure 4 showing a view from below of the ring 1 and where, apart from the crown gear D, the central barrel 2 and the hexagonal shape of the end of the piston 7 can be viewed, four first gripping zones in the form of notches at 12 o'clock, 3 o'clock, 6 o'clock and 9 o'clock respectively in the lower face of the crown 116.
  • Each of these indentations makes it possible to engage or grip the removable deckring 60 and grasp it from the outside.
  • the advantage of the disposition of a plurality of such gripping zones, in particular in pairs along the diameters of the removable deckring 60, is that it makes it possible to constrain the removable deckring 60 to be slightly ovalized during disassembly, when this operation requires manual intervention to deform it.
  • the removable deckring 60 may be made of a shape memory material that has been educated to exhibit a two-way memory effect, i.e. having a first circular shape at room temperature in which it maintains the seal in position in the position assembled to the hood, and a second form, for example oval, in which it can be disassembled when brought into a temperature beyond the critical threshold of deformation.
  • a shape memory material that has been educated to exhibit a two-way memory effect, i.e. having a first circular shape at room temperature in which it maintains the seal in position in the position assembled to the hood, and a second form, for example oval, in which it can be disassembled when brought into a temperature beyond the critical threshold of deformation.
  • Nitinol it would then be enough to apply the icing spray on the crown so that the deckring is automatically disassembled when its temperature would drop below -30 degrees.
  • the disassembly operation involves plastic deformation which can be either manual or automatic after a preliminary heating step or cooling to bring it beyond a critical temperature threshold above or below which it exhibits superelasticity properties.
  • the deckring is thus made removable without having to interact with other parts of the ring 1, which makes it easier to replace the seal 5.
  • the gripping of the removable deckring 60 for its assembly and disassembly can be facilitated not by gripping zones arranged on the crown, as the first gripping areas 1162 illustrated by the figure 4 , but by second gripping zones arranged directly on the deckring itself, as the notch 61 visible on the figure 5 .
  • first gripping areas 1162 it may be advantageous to arrange these second grip zones 61 in pairs, opposite along a diameter of the removable deckring 60 to facilitate gripping; however, the arrangement of such notches weakens parallel the removable deckring 60 during its deformation.

Claims (11)

  1. Krone (1) für ein Zeitmessgerät, die eine Kappe (11) umfasst, die durch einen mit einer seitlichen Schürze (111) fest verbundenen Deckel (112) gebildet ist, wobei die Krone (1) einen abnehmbaren Deckring (60) umfasst, der eine Ringdichtung (5) abdeckt, wobei die Krone (1) dadurch gekennzeichnet ist, dass der abnehmbare Deckring (60) aus einer Formgedächtnislegierung hergestellt ist.
  2. Krone (1) für ein Zeitmessgerät nach Anspruch 1, dadurch gekennzeichnet, dass die Übergangstemperatur der Formgedächtnislegierung weit außerhalb der Betriebstemperaturen einer Uhr liegt.
  3. Krone (1) für ein Zeitmessgerät nach Anspruch 2, dadurch gekennzeichnet, dass die Übergangstemperatur unter -25° liegt.
  4. Krone (1) für ein Zeitmessgerät nach einem der vorhergehenden Ansprüche, wobei die Ringdichtung (5) einen Ringquerschnitt-Durchmesser (t) besitzt und auf einem Absatz (1161) angeordnet ist, der in der unteren Fläche (116) der Kappe (11) ausgebildet ist, dadurch gekennzeichnet, dass zwischen dem inneren Umfang des abnehmbaren Deckrings (60) und dem äußeren Umfang eines Mittelrohrs (2) der Krone (1) ein Abstand (e) vorhanden ist, der kleiner oder gleich dem 1,5-fachen Ringquerschnitt-Durchmesser (t) ist.
  5. Krone (1) für ein Zeitmessgerät nach einem der vorhergehenden Ansprüche, wobei für den abnehmbaren Deckring (60) auf der Krone (1) mindestens eine erste Greiffläche (1162) vorgesehen ist.
  6. Krone (1) für ein Zeitmessgerät nach einem der vorhergehenden Ansprüche, wobei direkt auf dem abnehmbaren Deckring (60) mindestens eine zweite Greiffläche (61) ausgebildet ist.
  7. Verfahren für den Ein- und Ausbau eines aus einer Formgedächtnislegierung hergestellten abnehmbaren Deckrings (60) einer Krone (1) für ein Zeitmessgerät nach Anspruch 1, wobei das Verfahren einen Schritt des plastischen Verformens des abnehmbaren Deckrings (60) beim Ausbauen nach einem vorhergehenden Schritt des Erwärmens oder Abkühlens über einen kritischen Temperaturschwellenwert hinaus, oberhalb oder unterhalb dessen er superelastische Eigenschaften aufweist, umfasst.
  8. Verfahren für den Ein- und Ausbau eines abnehmbaren Deckrings (60) einer Krone (1) für ein Zeitmessgerät nach Anspruch 7, wobei der Schritt des plastischen Verformens des abnehmbaren Deckrings (60) manuell ausgeführt wird.
  9. Verfahren für den Ein- und Ausbau eines abnehmbaren Deckrings (60) einer Krone (1) für ein Zeitmessgerät nach Anspruch 8, wobei dem Schritt des manuellen plastischen Verformens des abnehmbaren Deckrings (60) ein Schritt des Erwärmens oder Abkühlens vorhergeht, um den abnehmbaren Deckring (60) auf eine Temperatur abseits der Betriebstemperaturen zu bringen, bei der er superelastische Eigenschaften bis zu 10 % aufweist.
  10. Verfahren für den Ein- und Ausbau eines abnehmbaren Deckrings (60) einer Krone (1) für ein Zeitmessgerät nach Anspruch 7, wobei der abnehmbare Deckring (60) aus einem Formgedächtnismaterial hergestellt ist, das trainiert ist, einen Zweiweg-Memory-Effekt aufzuweisen.
  11. Verfahren für den Ein- und Ausbau eines abnehmbaren Deckrings (60) einer Krone (1) für ein Zeitmessgerät nach einem der Ansprüche 7 bis 10, wobei der abnehmbare Deckring (60) in der eingebauten Position eine Kreisform und in der verformten Position eine ovale Form aufweist.
EP12197843.1A 2012-12-18 2012-12-18 Abnehmbares Kronrad Active EP2746870B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP12197843.1A EP2746870B1 (de) 2012-12-18 2012-12-18 Abnehmbares Kronrad
CH02846/12A CH707293B1 (fr) 2012-12-18 2012-12-18 Couronne démontable.
TW102144663A TWI612402B (zh) 2012-12-18 2013-12-05 用於時計的錶冠、以及用於組裝及拆卸時計錶冠的可移除式甲板環之方法
US14/105,516 US9229431B2 (en) 2012-12-18 2013-12-13 Removable crown
JP2013260873A JP5715679B2 (ja) 2012-12-18 2013-12-18 取り外し可能な竜頭
CN201310698263.XA CN103869682B (zh) 2012-12-18 2013-12-18 可移除的冠状件
HK14112569.0A HK1199112A1 (en) 2012-12-18 2014-12-15 Removable crown

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12197843.1A EP2746870B1 (de) 2012-12-18 2012-12-18 Abnehmbares Kronrad

Publications (2)

Publication Number Publication Date
EP2746870A1 EP2746870A1 (de) 2014-06-25
EP2746870B1 true EP2746870B1 (de) 2017-02-08

Family

ID=47552778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12197843.1A Active EP2746870B1 (de) 2012-12-18 2012-12-18 Abnehmbares Kronrad

Country Status (7)

Country Link
US (1) US9229431B2 (de)
EP (1) EP2746870B1 (de)
JP (1) JP5715679B2 (de)
CN (1) CN103869682B (de)
CH (1) CH707293B1 (de)
HK (1) HK1199112A1 (de)
TW (1) TWI612402B (de)

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Publication number Priority date Publication date Assignee Title
EP2765705B1 (de) * 2013-02-07 2015-08-19 The Swatch Group Research and Development Ltd. Durch ein Metall mit Formgedächtnis thermokompensierter Resonator
US10126278B2 (en) * 2016-03-04 2018-11-13 Ldetek Inc. Thermal stress resistant micro-plasma emission detector unit
EP3279745B1 (de) * 2016-08-02 2023-06-14 Meco S.A. Ausrichtbare geschraubte krone
US11604436B2 (en) * 2017-11-13 2023-03-14 Rolex Sa System for fixing a timepiece movement in a watch case
WO2019144228A1 (en) 2018-01-23 2019-08-01 Ldetek Inc. Valve assembly for a gas chromatograph
EP3805873B1 (de) * 2019-10-09 2023-12-06 Meco S.A. Ausrichtbare geschraubte krone
EP3805874B1 (de) * 2019-10-09 2023-12-27 Meco S.A. Ausrichtbare geschraubte krone
EP3805869A1 (de) * 2019-10-09 2021-04-14 Meco S.A. Geschraubte krone
EP3835887B1 (de) * 2019-12-10 2022-07-13 The Swatch Group Research and Development Ltd Armbanduhr mit steuerungsorgan

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CH247035A (fr) * 1944-11-28 1947-02-15 Schmitz Werner Remontoir à couronne amovible.
CH291565A (fr) * 1951-04-16 1953-06-30 Auchere Jean Edouard Victor Remontoir pour montre.
JPS4310215Y1 (de) * 1965-07-24 1968-05-04
CH685901B5 (fr) 1993-11-25 1996-05-15 Smh Management Services Ag Couronne-poussoir pour piece d'horlogerie.
US5617377A (en) * 1995-12-13 1997-04-01 Perret, Jr.; Gerard A. Watchband connector pin utilizing shape memory material
CH705649B1 (fr) * 2000-02-08 2013-04-30 Boninchi Sa Dispositif permettant le réglage de l'orientation d'une couronne à vis d'une montre par rapport à la carrure de la montre.
US7360944B2 (en) * 2003-10-24 2008-04-22 Richemont International Sa Control device with a disengageable crown for a wristwatch
TWM252043U (en) * 2004-02-25 2004-12-01 Shih-Yang Chan An improved structure for a ceramic watch case
EP1580625A1 (de) * 2004-03-23 2005-09-28 Asulab S.A. Vorrichtung und Verfahren zur Fixierung einer Palette auf einem Hemmungsanker in einem Uhrwerk
JP4728000B2 (ja) * 2005-01-17 2011-07-20 セイコーインスツル株式会社 携帯時計
JP2006194834A (ja) * 2005-01-17 2006-07-27 Seiko Instruments Inc 携帯時計
EP1701225B1 (de) * 2005-03-09 2012-02-22 Boninchi S.A. Geschraubte Krone für einer Uhr
JP4937013B2 (ja) * 2007-06-28 2012-05-23 セイコーインスツル株式会社 携帯時計が備える竜頭の製造方法
EP2058713B1 (de) * 2007-11-08 2010-02-03 Meco S.A. Krone für Uhr
EP2385432A2 (de) * 2010-05-04 2011-11-09 Rolex Sa Uhrgehäuse
CN102021364B (zh) * 2010-10-20 2013-05-15 燕山大学 高拉伸强度高塑性TiNi纳米晶材料及其制备方法
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Also Published As

Publication number Publication date
CN103869682B (zh) 2017-05-10
US9229431B2 (en) 2016-01-05
HK1199112A1 (en) 2015-06-19
TW201437773A (zh) 2014-10-01
CN103869682A (zh) 2014-06-18
JP2014119463A (ja) 2014-06-30
TWI612402B (zh) 2018-01-21
US20140169144A1 (en) 2014-06-19
CH707293B1 (fr) 2017-09-29
CH707293A2 (fr) 2014-06-30
EP2746870A1 (de) 2014-06-25
JP5715679B2 (ja) 2015-05-13

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