EP3293587A1 - Uhrenglas für armbanduhr - Google Patents

Uhrenglas für armbanduhr Download PDF

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Publication number
EP3293587A1
EP3293587A1 EP16187992.9A EP16187992A EP3293587A1 EP 3293587 A1 EP3293587 A1 EP 3293587A1 EP 16187992 A EP16187992 A EP 16187992A EP 3293587 A1 EP3293587 A1 EP 3293587A1
Authority
EP
European Patent Office
Prior art keywords
watch
skirt
watch glass
glass according
glass
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
EP16187992.9A
Other languages
English (en)
French (fr)
Other versions
EP3293587B1 (de
Inventor
Gregory Schmidt
Frank Vernay
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 Tudor SA
Original Assignee
Montres Tudor 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 Tudor SA filed Critical Montres Tudor SA
Priority to EP16187992.9A priority Critical patent/EP3293587B1/de
Priority to US15/698,260 priority patent/US10466651B2/en
Priority to JP2017171703A priority patent/JP7051340B2/ja
Priority to CN201710806444.8A priority patent/CN107807510B/zh
Publication of EP3293587A1 publication Critical patent/EP3293587A1/de
Application granted granted Critical
Publication of EP3293587B1 publication Critical patent/EP3293587B1/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
    • G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
    • G04B39/02—Sealing crystals or glasses
    • G04B39/025—Sealing crystals or glasses without special sealing parts
    • 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
    • G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
    • G04B39/004—Watch crystals; Fastening or sealing of crystals; Clock glasses from a material other than glass
    • G04B39/006—Watch crystals; Fastening or sealing of crystals; Clock glasses from a material other than glass out of wear resistant material, e.g. sapphire
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/06—Devices for shaping or setting watch glasses
    • 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

Definitions

  • the invention relates to a watch crystal. It also relates to a watch case and a timepiece as such including such a watch crystal.
  • the document CH310556 discloses a state-of-the-art watch case, comprising a monoblock watch crystal. This solution requires the use of a relatively elastic material and is not compatible with stronger materials such as sapphire.
  • the present invention aims to provide an improved solution of watch ice, and in particular to achieve all or part of the objects below.
  • a first object of the invention is to provide a watch ice particularly resistant, especially scratches.
  • a second object of the invention is to provide a watch crystal whose assembly on a watch case is simple, and achieves a suitable seal.
  • a third object of the invention is to provide a particularly aesthetic watch ice.
  • the invention is based on a watch glass, characterized in that it comprises a first element made of a first material and a second element made of a second material different from the first, in that the second element comprises a skirt in its lower part, and in that the two elements are fixed together so that the first element is oriented towards the outside of the watch in a direction opposite to that of the skirt and in that the skirt of the second element is adapted for assembling the watch glass on a watchband.
  • the figure 1 represents a watch crystal 1 according to a first embodiment of the invention.
  • the watch glass comprises a first element 2, made of a first rigid material, in particular a first transparent rigid material, preferably sapphire, intended for an outward orientation of a middle part of a watch. It furthermore comprises a second element 3 made of a second more elastic material, in particular a second more elastic transparent material, in particular a polymeric material, fixed to the first element 2.
  • the watch crystal 1 preferably has a symmetry around an axis A revolution.
  • the first element 2 of the watch crystal 1 is substantially in the form of a disc, axis A of revolution, whose upper surface is slightly curved, and in particular has a convex geometry.
  • the second element 3 comprises a first disc-shaped upper portion 3a whose diameter is substantially equal to that of the disc formed by the first element 2, allowing the attachment of its upper surface over the entire lower surface 2a of the first element 2, or alternatively on only a part of this surface.
  • the second element 3 comprises a second part, forming a skirt 3b, in the form of an extension or a substantially vertical wall extending downwards from the entire periphery of the second element 3, at the level of its periphery, of substantially annular horizontal section, axis A.
  • the skirt 3b has a substantially cylindrical shape of axis A according to the first embodiment.
  • the first part 3a fulfills the function of fixing the first element 2 and the skirt 3b the assembly function with a middle watch, as will be developed below.
  • the figure 2 illustrates the watch glass 1, according to the first embodiment, assembled on a watchband 4.
  • the assembly method will be more particularly illustrated with reference to the Figures 3 and 4 below.
  • the middle part 4 has a vertical extension 4b oriented upwards, whose outer surface, substantially vertical, comes into contact with the inner surface of the skirt 3b of the second element 3 of the watch glass 1.
  • a telescope 5 surrounds this assembly, comprises a first horizontal lower surface 5a, which rests on a horizontal surface 4a of the watch middle 4, and a second surface 5b, substantially vertical, which comes into contact with the outer surface of the skirt 3b.
  • the arrangement of the various components is such that the skirt 3b of the watch crystal 1 is thus compressed radially against the caseband 4 by the bezel 5, ensuring the maintenance of the watch crystal 1 on a watch case and the sealing of the watch box.
  • this assembly solution has the advantage of great simplicity, does not require a specific seal. It also allows to achieve a very aesthetic result.
  • the first element 2 is oriented towards the outside of the watch.
  • the skirt 3b extends in a direction opposite to the first element 2.
  • the first element 2 performs a first function of resistance to shocks and scratches and a second aesthetic function.
  • a first material very resistant and attractive aesthetic appearance, preferably sapphire.
  • the second element 3 mainly fulfills the assembly function on a watchband, and possibly contributes to the aesthetic effect, as will be illustrated below. It must therefore be in a sufficiently rigid material to ensure the resistance of the maintenance of the watch glass and withstand the forces after its mounting, while having a sufficient elastic property to allow the assembly of its skirt while sealing, which implies in particular flexural stresses.
  • the first and second materials are necessarily different, the second being less rigid and more elastic than the first.
  • the second material is advantageously made of polymer, preferably polymethyl methacrylate (PMMA) material that meets the aforementioned constraints while having the advantage of a very high optical transparency and excellent resistance to ultraviolet rays.
  • the second material used could be any other amorphous polymer such as polycarbonate (PC), polystyrene (PS), acrylonitrile butadiene styrene (ABS), polyvinyl chloride (PVC), polyethylene terephthalate ( PET), polycarbonate / polyethylene terephthalate (PC / PET), or polyurethanes (PU or PUR) ...
  • the fixing of the two elements 2, 3 of the watch crystal 1 is obtained by a bonding, in particular by ultraviolet bonding.
  • a bonding in particular by ultraviolet bonding.
  • these contact surface substantially corresponds to the entire lower surface 2a of the first element 2 (and therefore the entire upper surface of the second element 3), which maximizes the holding of the first element 2 on the second element, and indirectly on a watch case, while having the advantage of a laminated ice structure, which improves the overall strength, particularly useful in case of extremely violent shock that could break the first element 2.
  • gluing or more generally fasteners for example a mechanical fastening such as the riveting, particularly through related elements such as rivets, could be implemented.
  • the two elements 2, 3 are thus fixed to one another, and superimposed in a vertical direction.
  • the second element 3 could be overmolded on the first element 2, in particular the skirt 3b of the element 3 could be overmolded on the lower surface of the element 2 and / or on a side wall of the element 2 .
  • FIGS. 3 and 4 illustrate the assembly phases of a watch glass as illustrated on the figure 1 according to the first variant of the first embodiment of the invention on a watch middle part 4.
  • the skirt 3b of the second element 3 of the watch crystal 1 does not have a perfectly cylindrical shape of axis A , but has a section by a vertical plane of frustoconical shape. More precisely, in the variant represented and visible on the figure 3 where the skirt 3b occupies its natural resting position, the inner surface 31b of the skirt 3b is substantially vertical, parallel to the axis A of the watch crystal 1, while its outer surface 32b is slightly inclined towards the outside, so that the thickness of the skirt 3b steadily increases by moving towards its lower end.
  • this inclination of an angle ⁇ is slight, of the order of 3 degrees, between 0 and 10 degrees inclusive, or even between 2 and 4 degrees inclusive, relative to the vertical direction.
  • the vertical extension 4b towards the top of the watch middle 4 has an outer surface 42b of the same slightly inclined, substantially of the same angle as the orientation angle ⁇ of the surface 32b, of orientation complementary complementary, that is to say that the outer surface 42b moves outwards by moving upwards.
  • the figure 3 represents an initial phase of a method of assembling a watch glass 1 according to the invention on a watch middle part 4.
  • the watch crystal 1 has been positioned in abutment on the watch middle part 4, so that the lower horizontal surface of the skirt 3b is supported on a horizontal receiving surface of the watch middle 4, substantially at the base of the extension vertical 4b of the watch middle 4.
  • a bezel 5 is approached from above, in the vertical direction, around the outer surface of the watch crystal 1. This bezel 5 is then gradually lowered to its final position represented by the figure 4 , in which the watch glass 1 is finally mounted on the watch middle part 4.
  • the lower end of the inner wall 5b of the vertical bezel 5 has a chamfer.
  • the inner wall 5b may have a substantially frustoconical shape.
  • This inner surface 5b abuts on the outer surface of the watch glass 1, then pushes the skirt 3b due to its frustoconical conformation and its outer surface 32b inclined outwards.
  • This skirt 3b is thus compressed inwards, and deforms slightly in flexing inwardly due to its elastic property, because of the second material used and its shape.
  • its outer surface 32b matches the shape of the inner surface 5b of the vertical telescope 5.
  • the inner surface 31b of the skirt 3b thus becomes inclined at an angle ⁇ .
  • This inclination corresponds exactly or substantially to that of the outer surface 42b of the middle part 4 of the watch, so that these two surfaces 31b, 42b corresponding are held in abutment on their entire surface by the bezel 5.
  • the vertical extension 4b can possibly have elasticity so as to ensure the support surfaces 31b, 42b. This final configuration makes it possible to avoid any accidental tearing of the watch crystal 1, while ensuring the tightness of the assembly, even without the use of an assembly joint. It is thus a notched assembly of the watch crystal 1 on the caseband 4.
  • the figure 5 illustrates a watch glass 1 according to a second variant of the first embodiment of the invention, mounted on a watchband 4.
  • the skirt 3b comprises a zone of weakness 300b, which is in the form of a zone of smaller section positioned in the upper part of the skirt 3b.
  • This area of least resistance 300b has the effect of promoting the bending of the skirt 3b during assembly, by minimizing the internal stresses in the material of the skirt, making it easier to remain in the mechanical characteristics of the second material used for the second element 3.
  • the figure 6 illustrates the same view as the figure 2 with a watch glass according to a third embodiment of the invention.
  • the first disc-shaped portion 3a of the second element 3 comprises a recess 30a in its horizontal upper surface, intended for the accommodation of a decorative element 6.
  • a decorative element 6 may for example consist of a precious or semi-precious stone. It may also consist of an element, display or not, coated with luminescent material. It is visible from the outside because of the transparency of the first element 2 of the watch glass. Its positioning between the two elements 2, 3 of the watch ice, in "sandwich", allows it to be perfectly maintained and protected from external aggression.
  • a recess may also be provided on the horizontal upper face of the second element 3 so as to constitute a glue reservoir, in particular for the purpose of containing the excess glue deposited during the gluing of the elements 2 and 3.
  • the recess 30a is arranged such that it is not visible to the wearer, for example on the periphery of the middle part, in particular at the level of the flange of the middle part.
  • the upper surface of the first part 3a of the second element 3 may comprise a decoration, which may consist of all or part of the elements of the following group: a surface texturing, all patterns in relief, a surface metallization, color surface printing, etc. These approaches may generate decorative motifs, which may consist of any decorative design and / or any particular indications.
  • These approaches can also generate functional patterns, for example surface texturations reproducing lenses, in particular Fresnel lenses.
  • the first element 2 superimposed on at least one such pattern protects it from external aggressions such as shocks and ensure its durability.
  • the Figures 7 and 8 illustrate a second embodiment of the invention.
  • the figure 7 represents a watch glass 1 according to this second embodiment mounted on a watch middle part 4.
  • the watch crystal 1 differs from that of the first embodiment in that the first part 3a of the second element 3 does not extend on the entire lower surface of the first element 2. It extends from the outer end of the first element 2, a distance representing about one third of the radius of the disk forming the first element 2. More generally, this part 3a can be extend over only a portion of the length of the lower surface 2a of the first element 2, regardless of its shape.
  • This length preferably represents at least one-fifth of the total length of the lower surface 2a of the first element 2. This length may also represent at most half of the total length of the lower surface 2a of the first element 2.
  • this length bottom surface 2a is delimited by a step disposed at the inner end of the portion 3a, so that the central zone of the first element 2 is lower than the outer zone of the first element 2, a thickness of the order of the first part 3a of the second element: thus, the watch crystal 1 retains a substantially continuous bottom surface and substantially flat, horizontal.
  • the skirt 3b retains the same characteristics as in the first embodiment. As this is particularly visible on Figures 7 and 8 the first part 3a of the second element 3 forms a substantially horizontal ring.
  • the invention is not limited to the illustrated embodiments.
  • it is not limited to a circle-shaped watch ice cream, but can adapt to any shape to correspond to any form of watch case, for example rectangular or "barrel" type.
  • the upper surface of the watch ice can be flat or convex.
  • the lower surface of the watch ice can be flat or convex.
  • the watch ice could have more than two elements. It could in particular include at least one decorative element 6 as proposed in the third variant of the first embodiment of the invention. It could also include an external element, for example a magnifying glass favoring the reading of an hourly or hourly indication.
  • the outer element is in the rigid material mentioned, in particular in sapphire.
  • the invention also relates to a watch case comprising a watch crystal as described above, and to a timepiece comprising such a watch case.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Electric Clocks (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
EP16187992.9A 2016-09-09 2016-09-09 Uhrenglas für armbanduhr Active EP3293587B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP16187992.9A EP3293587B1 (de) 2016-09-09 2016-09-09 Uhrenglas für armbanduhr
US15/698,260 US10466651B2 (en) 2016-09-09 2017-09-07 Watch glass
JP2017171703A JP7051340B2 (ja) 2016-09-09 2017-09-07 小型時計ガラス
CN201710806444.8A CN107807510B (zh) 2016-09-09 2017-09-08 表玻璃

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16187992.9A EP3293587B1 (de) 2016-09-09 2016-09-09 Uhrenglas für armbanduhr

Publications (2)

Publication Number Publication Date
EP3293587A1 true EP3293587A1 (de) 2018-03-14
EP3293587B1 EP3293587B1 (de) 2020-02-19

Family

ID=56893841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16187992.9A Active EP3293587B1 (de) 2016-09-09 2016-09-09 Uhrenglas für armbanduhr

Country Status (4)

Country Link
US (1) US10466651B2 (de)
EP (1) EP3293587B1 (de)
JP (1) JP7051340B2 (de)
CN (1) CN107807510B (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH310556A (fr) 1953-09-15 1955-10-31 Rolex Montres Boîte de montre étanche.
CH505414A (fr) * 1968-10-01 1970-08-14 Novo Cristal S A Dispositif de fixation d'un verre en matière dure
CH541829A (fr) * 1970-06-11 1973-05-30 Centrale S A Fab Boîte de montre comprenant un verre en matière dure
EP0097393A1 (de) * 1982-06-21 1984-01-04 Firma H. Finger Armbanduhrgehäuse

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH1247369A4 (de) * 1968-08-19 1971-02-15
GB2023889B (en) * 1978-04-27 1982-12-08 Citizen Watch Co Ltd Watch case structure
JPS58500626A (ja) * 1981-05-01 1983-04-21 モントル・ラド−・エス・エイ 水密な腕時計用がわ
JPS5886591U (ja) * 1981-12-04 1983-06-11 シチズン時計株式会社 ガラスの固定構造
JPS59143985A (ja) * 1983-02-07 1984-08-17 Seiko Instr & Electronics Ltd 携帯時計ケ−ス
JPS604985U (ja) * 1983-06-22 1985-01-14 セイコーインスツルメンツ株式会社 超硬防水側
JPS607089U (ja) * 1983-06-28 1985-01-18 セイコーインスツルメンツ株式会社 携帯時計用超硬防水側
CH655422GA3 (de) * 1984-01-26 1986-04-30
CH683482B5 (fr) * 1991-12-28 1994-09-30 Ebauchesfabrik Eta Ag Procédé pour l'assemblage d'une glace sur une boîte de montre, pièce d'horlogerie comprenant des moyens de positionnement d'une glace sur une boîte, et glace destinée à équiper une telle pièce.
TW503344B (en) * 2000-02-02 2002-09-21 Asulab Sa Crystal for a telephone watch
JP2001289968A (ja) * 2000-04-04 2001-10-19 Seiko Instruments Inc 腕時計ケースのガラス固定構造
ATE439335T1 (de) * 2003-12-16 2009-08-15 Asulab Sa Verfahren zur herstellung eines transparenten elements mit unsichtbaren elektroden
US8303169B2 (en) * 2011-01-21 2012-11-06 Bulltoro Watch Company, LLC Comfort watch
EP2492251B1 (de) * 2011-02-23 2017-01-04 Schott Ag Substrat mit Antireflexionsbeschichtung und Verahren zu dessen Herstellung
EP2565733A3 (de) * 2011-08-31 2013-12-04 Seiko Epson Corporation Uhr
JP6331430B2 (ja) * 2014-01-31 2018-05-30 セイコーエプソン株式会社 電子時計
EP3112958B1 (de) * 2015-07-01 2022-03-16 Bulgari Horlogerie S.A. Uhr umfassend eine vorrichtung zur nahfeldkommunikation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH310556A (fr) 1953-09-15 1955-10-31 Rolex Montres Boîte de montre étanche.
CH505414A (fr) * 1968-10-01 1970-08-14 Novo Cristal S A Dispositif de fixation d'un verre en matière dure
CH541829A (fr) * 1970-06-11 1973-05-30 Centrale S A Fab Boîte de montre comprenant un verre en matière dure
EP0097393A1 (de) * 1982-06-21 1984-01-04 Firma H. Finger Armbanduhrgehäuse

Also Published As

Publication number Publication date
CN107807510B (zh) 2021-03-09
JP2018081078A (ja) 2018-05-24
JP7051340B2 (ja) 2022-04-11
EP3293587B1 (de) 2020-02-19
US20180074460A1 (en) 2018-03-15
CN107807510A (zh) 2018-03-16
US10466651B2 (en) 2019-11-05

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