EP2989505B1 - Befestigungsmethode eines uhrwerks in einem gehäuse - Google Patents

Befestigungsmethode eines uhrwerks in einem gehäuse Download PDF

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Publication number
EP2989505B1
EP2989505B1 EP14713112.2A EP14713112A EP2989505B1 EP 2989505 B1 EP2989505 B1 EP 2989505B1 EP 14713112 A EP14713112 A EP 14713112A EP 2989505 B1 EP2989505 B1 EP 2989505B1
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EP
European Patent Office
Prior art keywords
movement
back cover
timepiece
bearing surface
peripheral
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
EP14713112.2A
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English (en)
French (fr)
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EP2989505A1 (de
Inventor
David Benjamin Kraehenbuehl
Roger Müller
Marco Bettelini
Ines Ruestenberg
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
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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.)
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Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP14713112.2A priority Critical patent/EP2989505B1/de
Publication of EP2989505A1 publication Critical patent/EP2989505A1/de
Application granted granted Critical
Publication of EP2989505B1 publication Critical patent/EP2989505B1/de
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    • 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
    • G04B37/05—Fixed mountings for pocket or wrist watches
    • 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
    • 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
    • G04B37/0008—Cases for pocket watches and wrist watches
    • G04B37/0058—Cases for pocket watches and wrist watches for shaped watches

Definitions

  • the present invention relates to a device and a method for fixing a movement in a watch case, and in particular a movement in a case for a diving watch.
  • the plates on which the movements are arranged generally contain a net, that is to say an upper edge which is provided for their attachment to the housing.
  • the net can be fixed with flanges and screws that are inserted into threads, and thus pressed against a shoulder of the middle part. While this type of fastening has the advantage of being reliable and reversible, it nevertheless has the disadvantage of being relatively complex to implement because of the different manipulations required for the screws and the flanges, which seriously affects the productivity. and is thus not suitable for the manufacture of watches intended to be produced on a large scale.
  • the lower rim of the thread is always brought into abutment against a part of the middle part, and the shape of the bottom of the case, integral or not with the middle part, matches that of the lower part of the movement, to close machining tolerances.
  • US4558955 discloses such a solution for fixing a movement, according to which the latter is housed directly in a recess of a monobloc center-case and is held axially between the bottom of this recess, against which it bears, and the dial, retained by the ice.
  • the disadvantage of this type of attachment mode is that any deformation of the bottom, especially in the context of underwater use, is replicated directly on the plate, and the latter is particularly sensitive.
  • an alternative is, especially for plastic watches, to use reinforced structures containing for example metal skeletons or other types of materials to stiffen the housing.
  • This alternative is however not possible if one wishes to maintain aesthetic properties for the housing, especially if it is desired that it remains at least partially transparent.
  • the present invention relates to a timepiece comprising a housing in which is housed a movement comprising a lower peripheral support surface, the housing comprising a middle part to which are assembled respectively a bottom and an ice.
  • the timepiece is characterized in that it furthermore comprises a clamping element provided with a lower retaining surface and that the movement comprises an upper peripheral support surface, the lower retaining surface of the element of clamping and the upper peripheral support surface being in mutual contact, and that the bottom comprises an annular peripheral shoulder, against which is affixed the lower peripheral bearing surface of the movement, which is compressed between its lower peripheral bearing surface and its upper peripheral support surface respectively by the annular peripheral shoulder of the bottom, and the lower retaining surface of the clamping element.
  • the present invention also relates to a base for such a timepiece, taken separately, characterized in that it comprises a recessed central portion of variable thickness and an annular peripheral shoulder of constant thickness.
  • An advantage of the present invention is to better absorb possible deformations of the bottom, for example during consequent changes in pressure or temperature, thanks to the complete dissociation of the inner surface of the bottom relative to the movement. Thus it avoids exerting any negative torsional stress on the plate and therefore on all the elements of the movement, including the axes and bridges.
  • the movement is introduced from the top of the housing, dial side, which avoids any operation of turning the housing during assembly, and thus advantageously increases the mounting rates.
  • the figure 1 illustrates a sectional view of a timepiece according to a preferred embodiment of the invention in the assembled position, the movement 3, which is subject to a control rod 7 and which drives the needles 30 above a 6, dial is assembled in the housing 2 according to a method corresponding to a preferred embodiment of the invention.
  • the housing contains a monobloc bottom-middle, that is to say that the bottom portion 4 is made in one piece with the middle part forming the central portion of the housing 2.
  • Such monobloc part simplifies the assembly process of the movement 3 by eliminating an assembly step, the movement 3 can in this case be introduced directly from the top of the housing 2, that is to say, dial side, without the need to mount next the bottom nor to return the housing 2 to introduce the movement.
  • the assembly method of the invention also applies to a bottom 4 assembled to the middle 20 by driving, screwing or gluing or any other usual method of fixing. Nevertheless, the step of assembling the bottom 4 to the middle part 20 will preferably be carried out before the introduction movement 3 in the housing, so that the latter is always introduced dial side.
  • the bottom 4 On the edge of its inner surface, the bottom 4 comprises a peripheral annular shoulder 41, of a first width (L) , on which the movement 3 bears, and a recessed central portion 40 of depth (d) .
  • the lower peripheral support surface 31 of the movement 3 is superimposed at least partially on an upper peripheral support surface 32 of the movement 3, of a second width (1) , which is gripped by the lower retaining surface.
  • a clamping element constituted here by a portion 52 of the heel 51 of the ice 5, of a third width (T) , a lower surface of which bears against the upper peripheral support surface 32 of the movement 3 .
  • a first width L of the lower circumferential bearing surface 31 of the movement 3 greater than the second width 1 of the upper bearing surface 32 is chosen, but at the same time compensates for this by a third width T the bead 51 selected to be greater than the first width L of the peripheral bearing surface 31 of lower movement 3, to have a pinch and a symmetrical compression of the movement 3 at its periphery which generates the minimum torque.
  • the thickness of the bottom is constant and equal to (E) , while this variable thickness over the entire hollow central part 40, and minimum in the center of the bottom 4, a value of (e) .
  • e + d E.
  • the recessed central portion 40 allows the bottom 4 to deform slightly, especially at its center, when forces due to pressure, indicated by the arrows (P), are exerted on the housing 2, for example during immersion at a depth greater than ten meters or more, an additional bar is applied to the entire external surface of the case - which is equivalent to twice the surrounding pressure - without affecting the movement, which is caught between its lower 31 and upper 32 peripheral support surfaces but is not in contact with the bottom 4 in its recessed central portion 40.
  • the housing 2 is robust for pressure values such that the curvature of the bottom not reverse to the point that the recessed central portion 40 of the bottom 4 is brought to be again in contact with the movement 3.
  • the shape of the recessed central portion 40 of the bottom 4 is chosen to be preferably parabolic.
  • the movement 3 has a diameter of preferably between 25 and 40 millimeters
  • the first width L of the annular peripheral shoulder 41 of the bottom 3 is in this case chosen to be preferably between 2 and 5 millimeters. More generally, the first width L of the peripheral shoulder 41 of the bottom is chosen to be between a quarter and a tenth of the value of the diameter of the movement 3, to improve the pinching effect at its periphery while also allowing the bottom 4 to deform more easily under the effect of external forces of stress.
  • the housing 2 can then withstand a pressure of about 35 bars to a minimum.
  • the heel 51 of the ice 5 is brought into contact on a bearing 21 of the middle part 20 in the extension of the portion 52 resting on the upper peripheral bearing surface 32 of the movement 3.
  • the step of clamping the movement 3 between its lower peripheral portions 31 and upper 32 is carried out together with the mounting of the ice 5 on the middle part 20, preferably by ultrasonic welding.
  • the assembly structure obtained has the advantage of relieving the torsional stresses at the welded part thanks to the upper peripheral bearing surface 32 of the movement 3 which extends axially the scope of the middle part 21, and thus improves the strength and durability of the connection between the welded parts.
  • the fact that the lower bearing surfaces 31 and upper 32 are partially superimposed also makes it possible to preserve the integrity of the movement 3, avoiding the application of a torque in torsion which tends to to deform due to forces of opposite constraints and similar standard exerted on areas whose distance from the center would be very different.
  • the heel 51 of the ice whose third width Test preferably between 4 and 8 millimeters, is entirely superimposed on the above the annular peripheral shoulder 41, to further improve the pinch effect.
  • the third width T of the heel 51 will preferably be chosen to be at most equal to twice that of the first width L of the annular peripheral shoulder 41.
  • FIGS. 2A and 2B respectively illustrate a view from above and in section along an axis AA of a preferred embodiment for the mode of assembly of the movement 3 in a housing 2 according to the invention for a timepiece 1 corresponding to a diving watch .
  • FIG 2A is a top view of the diving watch, showing the case 2, as well as the ice 5 surmounted by a telescope 8.
  • Figure 2B makes it possible to distinguish the parts inside the casing 2, and in particular the movement 3 conventionally provided with a net 33 on its part higher.
  • This thread 33 is however not provided to ensure the axial retention of the movement 3 in the housing 2, this function being fulfilled by the annular peripheral shoulder 41 of the bottom 4 and the portion 52 of the heel 51 of the ice 5 which take sandwiching respectively the lower peripheral bearing surfaces 31 and 32 upper movement 3 for its clamping when the ice 5 is welded to the scope 21 of the middle part 20 at the heat sealing zone 22 materialized by the small beak descending to the periphery Heel 51.
  • the movement 3 is clamped between a portion 52 of the heel 51 of the glass 5 and the annular peripheral shoulder 41 of the bottom 4.
  • the bezel 8 may be mounted on the ice later 5.
  • the lower peripheral bearing surface 31 of the movement of a first width L equal to 4 millimeters just like that of the annular peripheral shoulder 41 of the bottom 4 which compresses it by the bottom 4, and the upper peripheral bearing surface 32 of the movement, of a second width l equal to 2.5 millimeters just as the portion 52 of the heel 51 of the ice 5 which compresses it from above, are integrally superimposed, so that the nip thus created generates the minimum torque at the periphery of the movement.
  • the heel 51 has a third width T of 7 to 8 millimeters and is superimposed integrally with the annular peripheral shoulder 41 for the same reasons of minimization of the torsional deformation stresses on the movement 3.
  • the bead 51 will comprise an inwardly extending portion opposite to that of the heat sealing zone 22 relative to the portion 52 squeezing the motion at its surface. upper support 32.
  • the thickness E of the bottom is about 3 millimeters and its minimum thickness is 2.5 millimeters, revealing a notch of about 0.5 millimeters in depth in the center.
  • the recessed central portion 40 of the bottom 4 has a form of parabolic preference to facilitate the deformation of the bottom 4 and optimize the distribution of stress forces exerted on the bottom of the housing 2. Still for reasons of symmetry and optimal distribution pressure forces resulting from the pressure, the ice 5 preferably has a shape and a thickness similar to that of the bottom 4.
  • the preferential assembly structure obtained after the clamping operation of the movement 3 between its lower and upper peripheral support surfaces 31 and 32 directly involves a portion 52 of the heel 51.
  • ice 5 as a lower surface for retaining a clamping element, and a laser welding operation, which not only saves a dedicated part for the axial retention of the movement 3, pressed against the shoulder annular peripheral 41 of the bottom 4 by the ice 5, acting as a clamping element, but also to dispense with a dedicated fixing operation of the movement 3, since the latter is fixed together with the bottom when the ice 5 is welded to the middle part 20.
  • the reduction in the number of parts and assembly operations necessary for the fixation of the movement thus makes it possible jointly to reduce the production costs. n and increase productivity.
  • the parts assembled in the context of the present invention, and in particular the bottom 4 are preferably made of a plastic material.
  • the present invention also includes cases 2 including diving watches comprising funds 4 made of steel or metal, whose rigidity is certainly greater, but which are not however free of any deformation for very high pressures.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)

Claims (10)

  1. Zeitmessgerät (1), das ein Gehäuse (2) umfasst, in dem ein Werk (3) aufgenommen ist, das eine untere Umfangsabstützoberfläche (31) aufweist, wobei das Gehäuse (2) ein Gehäusemittelteil (20) umfasst, an das ein Boden (4) und ein Glas (5) angefügt sind,
    wobei das Zeitmessgerät (1) außerdem ein Spannelement umfasst, das mit einer unteren Halteoberfläche versehen ist, und das Werk (3) eine obere Umfangsabstützoberfläche (32) aufweist, wobei die untere Halteoberfläche des Spannelements und die obere Umfangsabstützoberfläche (32) miteinander in Kontakt stehen und wobei der Boden (4) eine ringförmige Umfangsschulter (41) mit konstanter Dicke, auf die die untere Umfangsabstützoberfläche (31) des Werks (3) aufgesetzt ist, und einen ausgesparten Mittelteil (40) mit variierender Dicke aufweist, wobei das Werk (3) zwischen der unteren Umfangsabstützoberfläche (31) und der oberen Umfangsabstützoberfläche (32) des Werks (3) eingeklemmt ist, wobei die untere (31) und die obere (32) Umfangsabstützoberfläche des Werks (3) jeweils zumindest teilweise überlagert sind durch die ringförmige Umfangsschulter (41) des Bodens (4) und die untere Oberfläche des Spannelements, dadurch gekennzeichnet, dass der ausgesparte Mittelteil eine in parabolischer Form variierende Dicke hat.
  2. Zeitmessgerät (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die untere Halteoberfläche des Spannelements durch einen Abschnitt (52) der Aufstandsfläche (51) des Glases (5) gebildet ist.
  3. Zeitmessgerät (1) nach Anspruch 2, dadurch gekennzeichnet, dass der Boden (4) und das Gehäusemittelteil (20) einteilig ausgebildet sind.
  4. Zeitmessgerät (1) nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, dass die Aufstandsfläche (51) des Glases (5) der ringförmigen Umfangsschulter (41) des Bodens (4) vollständig überlagert ist.
  5. Zeitmessgerät (1) nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass das Werk (3) einen Durchmesser im Bereich von 25 bis 40 Millimeter besitzt und dass sich die Umfangsschulter (41) des Bodens (4) über eine erste Breite (L) von höchstens 5 Millimetern erstreckt, die Aufstandsfläche (51) des Glases (5) sich über eine dritte Breite (T) von höchstens 8 Millimetern erstreckt und der Abschnitt (52) der Aufstandsfläche (51) sich über eine zweite Breite (I) von höchstens 4 Millimetern erstreckt.
  6. Boden (4) für ein Zeitmessgerät (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass er eine ringförmige Umfangsschulter (41) mit konstanter Dicke und einen ausgesparten Mittelteil (40) mit in parabolischer Form variierender Dicke umfasst.
  7. Boden für ein Zeitmessgerät (1) nach Anspruch 6, wobei die maximale Dicke (E) des Bodens im Bereich von 3 bis 5 mm liegt und die minimale Dicke des Bodens (e) im Bereich von 2,5 bis 4 mm liegt.
  8. Boden für ein Zeitmessgerät (1) nach einem der Ansprüche 6 oder 7, dadurch gekennzeichnet, dass die Breite der Umfangsschulter (41) im Bereich von einem Viertel bis einem Zehntel des Wertes des Durchmessers des Werks liegt.
  9. Verfahren zum Zusammenbau für ein Zeitmessgerät (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Montage des Werks (3) in dem Gehäuse (2) die folgenden Schritte umfasst:
    - Einsetzen des Werks (3) in das Gehäuse (2) auf Seiten des Zifferblatts,
    - Anbringen einer unteren Umfangsabstützoberfläche (31) des Werks (3) an einer ringförmigen Umfangsschulter (41) mit konstanter Dicke des Bodens (4), wobei der Boden (4) außerdem einen ausgesparten Mittelteil (40) mit veränderlicher Dicke in Parabolform aufweist, dann,
    - Drücken des Werks (3) gegen den Boden (4) durch ein Spannelement, das sich an einer oberen Umfangsabstützoberfläche (32) des Werks (3) abstützt, derart, dass das Werk zwischen der unteren Umfangsabstützoberfläche (31) des Werks (3) und der oberen Umfangsabstützoberfläche (32) des Werks (3) eingeklemmt wird, wobei die untere (31) und die obere (32) Umfangsabstützoberfläche des Werks (3) jeweils zumindest teilweise überlagert sind durch die ringförmige Umfangsschulter (41) des Bodens (4) und eine untere Halteoberfläche des Spannelements.
  10. Verfahren zum Zusammenbau für ein Zeitmessgerät (1) nach Anspruch 9, dadurch gekennzeichnet, dass der Boden (4) und das Gehäusemittelteil (2) einteilig ausgebildet sind, wobei die untere Halteoberfläche des Spannelements durch einen Abschnitt (52) der Aufstandsfläche (51) des Glases (5) gebildet ist und der Einspannschritt gemeinsam mit dem Schritt des Montierens des Glases (5) an dem Gehäusemittelteil (20) ausgeführt wird.
EP14713112.2A 2013-04-23 2014-03-27 Befestigungsmethode eines uhrwerks in einem gehäuse Active EP2989505B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14713112.2A EP2989505B1 (de) 2013-04-23 2014-03-27 Befestigungsmethode eines uhrwerks in einem gehäuse

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13164990.7A EP2796942A1 (de) 2013-04-23 2013-04-23 Befestigungsmethode eines Uhrwerks in einem Gehäuse
EP14713112.2A EP2989505B1 (de) 2013-04-23 2014-03-27 Befestigungsmethode eines uhrwerks in einem gehäuse
PCT/EP2014/056139 WO2014173611A1 (fr) 2013-04-23 2014-03-27 Dispositif et méthode de fixation d'un mouvement dans un boîtier

Publications (2)

Publication Number Publication Date
EP2989505A1 EP2989505A1 (de) 2016-03-02
EP2989505B1 true EP2989505B1 (de) 2017-05-03

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Application Number Title Priority Date Filing Date
EP13164990.7A Withdrawn EP2796942A1 (de) 2013-04-23 2013-04-23 Befestigungsmethode eines Uhrwerks in einem Gehäuse
EP14713112.2A Active EP2989505B1 (de) 2013-04-23 2014-03-27 Befestigungsmethode eines uhrwerks in einem gehäuse

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Application Number Title Priority Date Filing Date
EP13164990.7A Withdrawn EP2796942A1 (de) 2013-04-23 2013-04-23 Befestigungsmethode eines Uhrwerks in einem Gehäuse

Country Status (6)

Country Link
US (1) US9329577B2 (de)
EP (2) EP2796942A1 (de)
JP (1) JP6078205B2 (de)
CN (2) CN105143995B (de)
HK (1) HK1218445A1 (de)
WO (1) WO2014173611A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2796942A1 (de) * 2013-04-23 2014-10-29 ETA SA Manufacture Horlogère Suisse Befestigungsmethode eines Uhrwerks in einem Gehäuse
CN108601276A (zh) * 2018-04-04 2018-09-28 安徽华米信息科技有限公司 可穿戴设备
JP6866884B2 (ja) * 2018-10-04 2021-04-28 カシオ計算機株式会社 ケース、時計、ケースの製造方法及び時計の製造方法
JP6795019B2 (ja) * 2018-10-04 2020-12-02 カシオ計算機株式会社 ケース及び時計
EP4191347A1 (de) * 2021-12-01 2023-06-07 The Swatch Group Research and Development Ltd Armbanduhrengehäuse mit einem boden, der in einer vordefinierten winkelposition ausgerichtet ist

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0125376A1 (de) * 1983-04-16 1984-11-21 RODI & WIENENBERGER Aktiengesellschaft Armbanduhr
CH685659B5 (fr) * 1994-03-04 1996-03-15 Asulab Sa Montre indiquant une prevision meteorologique.
DE69707100T2 (de) * 1996-10-03 2002-08-22 Rado Montres Sa Uhrengehäuse mit einer schale und einer haltevorrichtung
DE69935656T2 (de) * 1999-04-22 2007-12-13 Eta Sa Manufacture Horlogère Suisse Verfahren zum Montieren eines Gehäuseringes in einem Uhrengehäuse und dafür verwendbarer Gehäusering
TW505831B (en) * 2001-03-15 2002-10-11 Ebauchesfabrik Eta Ag Watch case assembled via the bezel
EP1906268A1 (de) * 2006-09-27 2008-04-02 Omega SA Uhrengehäuse mit Multikomponenten-Mittelteil
US8876371B2 (en) * 2009-03-19 2014-11-04 Rolex S.A. Watch case
EP2367077B1 (de) * 2010-03-16 2017-07-26 Montres Breguet SA Baugruppe mit Glas und Glasreif für Uhren und Verfahren zum Zusammenbau
EP2796942A1 (de) * 2013-04-23 2014-10-29 ETA SA Manufacture Horlogère Suisse Befestigungsmethode eines Uhrwerks in einem Gehäuse

Also Published As

Publication number Publication date
JP6078205B2 (ja) 2017-02-08
EP2796942A1 (de) 2014-10-29
CN105143995B (zh) 2018-02-23
EP2989505A1 (de) 2016-03-02
CN204229121U (zh) 2015-03-25
CN105143995A (zh) 2015-12-09
JP2016515709A (ja) 2016-05-30
HK1218445A1 (zh) 2017-02-17
WO2014173611A1 (fr) 2014-10-30
US20160054707A1 (en) 2016-02-25
US9329577B2 (en) 2016-05-03

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