EP0770937A1 - Timepiece provided with a rotatable bezel - Google Patents

Timepiece provided with a rotatable bezel Download PDF

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Publication number
EP0770937A1
EP0770937A1 EP96116304A EP96116304A EP0770937A1 EP 0770937 A1 EP0770937 A1 EP 0770937A1 EP 96116304 A EP96116304 A EP 96116304A EP 96116304 A EP96116304 A EP 96116304A EP 0770937 A1 EP0770937 A1 EP 0770937A1
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EP
European Patent Office
Prior art keywords
bezel
timepiece according
cuff
crystal
telescope
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
EP96116304A
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German (de)
French (fr)
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EP0770937B1 (en
Inventor
Kaelin Laurent
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
Ebauchesfabrik ETA AG
Original Assignee
Ebauchesfabrik ETA AG
Eta SA Fabriques dEbauches
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Publication date
Priority claimed from CH03035/95A external-priority patent/CH689955A5/en
Application filed by Ebauchesfabrik ETA AG, Eta SA Fabriques dEbauches filed Critical Ebauchesfabrik ETA AG
Publication of EP0770937A1 publication Critical patent/EP0770937A1/en
Application granted granted Critical
Publication of EP0770937B1 publication Critical patent/EP0770937B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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

Definitions

  • the invention relates to a timepiece comprising a rotating bezel, on which are recorded, for example, indications relating to time.
  • a timepiece of the wristwatch type comprising a case having a middle part, a base, a crystal fixedly mounted on the middle part, and a rotating bezel of the above-mentioned type, guided in rotation relative to the crystal and the middle.
  • Wristwatches fitted with such a bezel are generally intended to be used for scuba diving and allow the indication of an elapsed or remaining time to elapse.
  • the bezel cooperates with latching means which are mounted on the glass and / or on the middle part and which allow a unidirectional rotary movement of the bezel, as well as maintaining it in predetermined angular positions relative to the watch face.
  • the latching means comprise a steel pawl spring which cooperates with a toothing formed on the bezel.
  • the latter is held axially on the middle by means of a steel wire spring penetrating both into a first groove formed in a cylindrical bearing surface of the middle and into a second groove of the bezel arranged opposite the first.
  • the middle part further comprises two shoulders arranged on either side of the second groove, each of the shoulders cooperating with a corresponding shoulder of the bezel. To seal the ratchet system, two seals are interposed between the shoulders of the middle part and of the bezel, respectively.
  • the centering of the bezel is carried out relative to the middle part using the wire spring disposed in the housing formed by the first and second grooves.
  • this spring is mounted with a certain radial clearance with respect to the middle part. This radial clearance permanently allows a rotational movement of the geometric center of the bezel around the center of the middle, which leads to imprecise manipulation and gives the watch which is equipped with an impression of average quality.
  • the mounting structure of the bezel described in this document leads either to excessive friction of the seals on the middle or the bezel and consequently to difficult handling of the bezel, or to a Too low friction of the seals and consequently to a too low retention of the telescope in a determined position, in particular in the event of an impact or the like.
  • the main object of the invention is therefore to remedy the abovementioned drawbacks of the prior art by providing a timepiece comprising a rotating bezel associated with latching means and with means for retaining on the box and comprising a structure of mounting of the bezel on the middle part which allows effective centering of the bezel with respect to the middle part and to the crystal and which gives the bezel a substantially constant torque resistant to rotation, while being simple and economical to produce by techniques of classic manufacture in the field.
  • Another object of the invention is to provide a timepiece comprising a rotating bezel whose mechanism is protected against solid impurities and which can thus be used in any type of environment without the proper functioning of the bezel being affected.
  • the subject of the invention is a timepiece comprising a case having a middle part, a base, a crystal fixedly mounted on the middle part, a rotating bezel guided in rotation relative to the crystal and the middle part, means for retaining said bezel on the middle part, and a latching mechanism associated with the bezel comprising a ratchet spring cooperating with a toothing formed in the bezel, characterized in that a gasket is arranged above the latching mechanism between the telescope and the glass, the said lining ensuring both centering of the telescope with respect to the glass and friction retention against the rotation of the telescope.
  • the arrangement of the lining directly between the telescope and the glass makes it possible to obtain a torque that is resistant to rotation of the telescope substantially constant, which if necessary can compensate for the flexibility of the pawl spring in the case where the pawls do not provide sufficient retention of the bezel in its authorized direction of rotation.
  • this particular arrangement of the lining makes it possible to center the telescope relative to the glass and thus to have a very small clearance between these two elements, thereby improving the resistance to the penetration of impurities on the one hand and the aesthetic appearance of the timepiece on the other hand.
  • the middle part comprises in its upper part a cuff and the retaining means comprise a split ring of plastic material, disposed in a first housing formed partially in the bezel and in the external surface of said cuff when the bezel is in place on the middle.
  • the cuff comprises in its outer upper part a frustoconical surface which is extended by a cylindrical part in which is formed a radial annular groove, forming part of the first housing, in its middle part and by a shoulder in its lower part.
  • the positioning of the bezel on the cuff and its axial retention can be simply carried out by placing the split ring in the groove of the bezel then by forcing the bezel on the cuff, the split ring spreading passing over the conical surface. It should be noted in this connection that the dismantling of the bezel can be easily carried out by breaking the split ring.
  • timepiece according to the invention will be described below, designated by the general reference 1.
  • the timepiece 1 comprises a case 2 comprising a middle part 4, a bottom 6 and a crystal 8, and in which is housed a movement 10 surmounted by a dial 12.
  • the middle part 4 and the bottom 6 are made in a single metal piece.
  • fixing horns 14 intended to allow the connection of the timepiece with a bracelet, not shown.
  • the glass 8 is made of plastic and is fixed directly, by its peripheral lower part, to a flange 16 of synthetic material of the movement 10, by welding or gluing.
  • the rim 16 is moreover pinched between bearing surfaces 18 and 20 respectively of the middle part 4 and of a cuff 22 fixed to the notch, by its a lower lip 24, on a shoulder of the middle part.
  • a gasket 26 is interposed between the flange 16 and the surface 18 to seal the box vis-à-vis the outside.
  • the crystal 8 is thus fixed relative to the middle part 4.
  • the cuff 22 comprises a cylindrical inner surface 28, followed by a shoulder forming the bearing surface 20 and a cylindrical lower part which widens slightly outwards and forms the lip 24.
  • the cuff 22 In its upper outer part, the cuff 22 has a frustoconical surface 30 above a cylindrical part 32 in which is formed a radial annular groove 34. Below, the cuff 22 has a shoulder 36 in its middle part and ends by lip 24.
  • the timepiece 1 further comprises a rotating bezel 36, for example made of metal, which is guided in rotation relative to the crystal 8 and to the middle part 4.
  • the bezel 36 comprises a first cylindrical surface 38 opening onto a second cylindrical bearing 40 of diameter greater than the first, an axial internal toothing 42 in sawtooth, a radial annular groove 44 and an axial bearing 46.
  • the glass 8 comprises a peripheral flank provided with an annular groove 48 and a shoulder defining an axial reach 50.
  • the annular groove receives a sealing gasket 52 and is arranged substantially in view of the cylindrical surface 38.
  • the annular groove 48 preferably has a circular section and the lining 52 has the shape of an elastomer O-ring.
  • the cylindrical inner surface 28 defines with said shoulder formed in the glass 8 a housing in which is disposed a ratchet spring 54.
  • annular pawl spring 54 rests on the axial surface of the shoulder 50 and is kept fixed in rotation, for example by driving, or gluing on the ice or even using E notches provided in the spring. and cooperating with lugs or provided for this purpose in the side of the glass 8, or vice versa.
  • the spring 54 comprises in the example illustrated in particular in Figures 2 and 3 six pawls 56 in the form of elastic blades which can bend axially and cooperate with the teeth 42 of the bezel 36, thereby forming the latching mechanism with which cooperates bezel 26.
  • the pawl spring 54 and more particularly, the pawls 56 are made of plastic. This has the advantage of eliminating any risk of injury to the teeth 42 of the telescope 36 during the rotation of the telescope, in particular when the latter is made of a "soft" metallic material such as aluminum or an alloy based on aluminum.
  • the spring 54 is made for example of a plastic material having a high elastic limit and preferably between 160 and 200 MPa.
  • a polyamide 6.6 loaded with 40% carbon fiber sold by the company Hoechst under the name Celanese Nylon is perfectly suitable.
  • the seal 52 is provided above the latching mechanism of the telescope 36, so that the latter is protected against the penetration of any solid impurity which may damage this mechanism during rotation bezel 36.
  • the bezel 36 is centered directly on the crystal 8, by the seal 52.
  • the clearance 58 between the cylindrical surface 38 of the telescope 36 and the glass 8 can be very small and for example between 0.10 mm and 0.20 mm at the radius. The risk of foreign bodies entering this gap is therefore practically excluded.
  • this centering of the bezel using the gasket makes it possible to virtually eliminate any radial deflection of the bezel, thus giving the watch equipped with the bezel an impression of high quality.
  • the bezel 36 further comprises axial retaining means on the middle part 4.
  • These retaining means comprise a split ring 60 disposed in a housing formed partially in the bezel 36 and in the outer surface of the cuff 22 when the bezel 36 is in place on the middle part 4.
  • the split ring 60 is a plastic ring having a rectangular cross section, its radial dimension being greater than its axial dimension and which is generally designated by elastic ring "flat".
  • a plastic material preferably having a high shear strength will be chosen. A material identical to that of the ratchet spring is perfectly suited.
  • the housing therefore has a rectangular section and is formed by the radial annular grooves 34 and 44 formed respectively in the cuff 22 and in the bezel 36, facing each other, the split ring 60 being mounted in this housing. so that it extends, in its normal position shown in Figure 1, both in the groove 34 of the cuff and in the groove 44 of the bezel 22. However, it benefits from a radial clearance allowing it to s 'retract into the groove 44 by elastic expansion.
  • the bezel can only be dismantled by an axial pull causing the split ring to break. This inexpensive part will be replaced during reassembly of the bezel.

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

Abstract

The watch has a box (2) with bottom (6) and shoulder (4) which contains the mechanism (10) and also a dial (12) and watch glass (8). An oversleeve (22) is fixed to a rebate in the shoulder (4) by a lower lip (24). A sight glass rim (36) has an internal annular slot (44) which engages with a split ring (60) which is housed in the outer face of the oversleeve (22). The sight glass rim has teeth (42) which cooperate with sprung pawls on a ring (54) fixed to the glass (8) to control rim movement. The assembly is completed by a sealing ring (52).

Description

L'invention concerne une pièce d'horlogerie comportant une lunette tournante, sur laquelle sont par exemple inscrites des indications relatives au temps.The invention relates to a timepiece comprising a rotating bezel, on which are recorded, for example, indications relating to time.

Plus particulièrement, elle concerne une pièce d'horlogerie du type montre-bracelet comportant une boîte ayant une carrure , un fond, une glace montée fixement sur la carrure, et une lunette tournante du type susmentionné, guidée en rotation par rapport à la glace et à la carrure.More particularly, it relates to a timepiece of the wristwatch type comprising a case having a middle part, a base, a crystal fixedly mounted on the middle part, and a rotating bezel of the above-mentioned type, guided in rotation relative to the crystal and the middle.

Les montres-bracelets munies d'une telle lunette sont généralement destinées à être utilisées pour la plongée sous-marine et permettent l'indication d'un temps écoulé ou restant a s'écouler. A cet effet et pour éviter tout mouvement intempestif de la lunette en cours d'utilisation, la lunette coopère avec des moyens d'encliquetage qui sont montés sur la glace et/ou sur la carrure et qui permettent un mouvement rotatif unidirectionnel de la lunette, ainsi que le maintien de celle-ci dans des positions angulaires prédéterminées par rapport au cadran de la montre.Wristwatches fitted with such a bezel are generally intended to be used for scuba diving and allow the indication of an elapsed or remaining time to elapse. To this end and to avoid any untimely movement of the bezel during use, the bezel cooperates with latching means which are mounted on the glass and / or on the middle part and which allow a unidirectional rotary movement of the bezel, as well as maintaining it in predetermined angular positions relative to the watch face.

Généralement, les moyens d'encliquetage comprennent un ressort à cliquets en acier qui coopère avec une denture ménagée sur la lunette. Cette dernière est maintenue axialement sur la carrure au moyen d'un ressort fil en acier pénétrant à la fois dans une première gorge ménagée dans une portée cylindrique de la carrure et dans une deuxième gorge de la lunette ménagée en regard de la première. La carrure comporte en outre deux épaulements disposés de part et d'autre de la deuxième gorge, chacun des épaulements coopérant avec un épaulement correspondant de lunette. Pour assurer l'étanchéité du système d'encliquetage deux joints d'étanchéité sont interposés entre les épaulements respectivement de la carrure et de la lunette.Generally, the latching means comprise a steel pawl spring which cooperates with a toothing formed on the bezel. The latter is held axially on the middle by means of a steel wire spring penetrating both into a first groove formed in a cylindrical bearing surface of the middle and into a second groove of the bezel arranged opposite the first. The middle part further comprises two shoulders arranged on either side of the second groove, each of the shoulders cooperating with a corresponding shoulder of the bezel. To seal the ratchet system, two seals are interposed between the shoulders of the middle part and of the bezel, respectively.

Une boîte de montre ayant une telle structure de montage de la lunette est décrite dans le brevet CH 662 922.A watch case having such a mounting structure for the bezel is described in patent CH 662,922.

Selon ce document, le centrage de la lunette est réalisé par rapport à la carrure à l'aide du ressort-fil disposé dans le logement formé par les première et deuxième gorges. Toutefois, pour des raisons de montage et de fonctionnement, ce ressort est monté avec un certain jeu radial vis-à-vis de la carrure. Ce jeu radial autorise en permanence un mouvement de rotation du centre géométrique de la lunette autour du centre de la carrure, ce qui conduit à une manipulation imprécise et confère à la montre qui en est équipée une impression de qualité moyenne.According to this document, the centering of the bezel is carried out relative to the middle part using the wire spring disposed in the housing formed by the first and second grooves. However, for mounting and operating reasons, this spring is mounted with a certain radial clearance with respect to the middle part. This radial clearance permanently allows a rotational movement of the geometric center of the bezel around the center of the middle, which leads to imprecise manipulation and gives the watch which is equipped with an impression of average quality.

Par ailleurs, pour que les joints d'étanchéité travaillent de façon optimale, il est nécessaire de réaliser les divers épaulements et gorges selon une succession d'opérations d'usinage de la carrure et de la lunette avec de très faibles tolérances de fabrication des épaulements et gorges les uns par rapport aux autres, typiquement de l'ordre de quelques centièmes de millimètre. Toutefois, de tels tolérances d'usinage sont pratiquement impossibles à respecter avec les machines de fabrication classiques de ce type d'éléments. Avec une technique de fabrication classique, la structure de montage de la lunette décrite dans ce document conduit soit à une friction trop importante des joints d'étanchéité sur la carrure ou la lunette et par conséquent à une manipulation difficile de la lunette, soit à une friction trop faible des joints d'étanchéité et par conséquent à une retenue trop faible de la lunette dans une position déterminée, notamment en cas de choc ou analogue. Dans ce dernier cas, l'efficacité des joints d'étanchéité est diminuée. Or, la vocation de ce type de montre-bracelet fait que celle-ci est fréquemment utilisée dans des environnements marins où se trouvent de nombreuses impuretés solides telles que le sable, dont les grains peuvent se loger facilement entre la lunette et la glace, et le cas échéant entre la lunette et la carrure, et peuvent coincer le mouvement rotatif de la lunette et endommager sérieusement les moyens d'encliquetage.Furthermore, for the seals to work optimally, it is necessary to produce the various shoulders and grooves according to a succession of operations for machining the middle and the bezel with very small tolerances for manufacturing the shoulders. and grooves relative to each other, typically of the order of a few hundredths of a millimeter. However, such machining tolerances are practically impossible to respect with conventional machines for manufacturing this type of element. With a conventional manufacturing technique, the mounting structure of the bezel described in this document leads either to excessive friction of the seals on the middle or the bezel and consequently to difficult handling of the bezel, or to a Too low friction of the seals and consequently to a too low retention of the telescope in a determined position, in particular in the event of an impact or the like. In the latter case, the effectiveness of the seals is reduced. However, the vocation of this type of wristwatch is that it is frequently used in marine environments where there are many solid impurities such as sand, including grains can be easily housed between the bezel and the crystal, and if necessary between the bezel and the middle part, and can trap the rotary movement of the bezel and seriously damage the latching means.

L'invention a donc pour but principal de remédier aux inconvénients susmentionnés de l'art antérieur en fournissant une pièce d'horlogerie comportant une lunette tournante associée à des moyens d'encliquetage et à des moyens de retenue sur la boîte et comportant une structure de montage de la lunette sur la carrure qui permette un centrage efficace de la lunette par rapport à la carrure et à la glace et qui confère à la lunette un couple résistant à la rotation sensiblement constant, tout en étant simple et économique à réaliser par les techniques de fabrication classique dans le domaine.The main object of the invention is therefore to remedy the abovementioned drawbacks of the prior art by providing a timepiece comprising a rotating bezel associated with latching means and with means for retaining on the box and comprising a structure of mounting of the bezel on the middle part which allows effective centering of the bezel with respect to the middle part and to the crystal and which gives the bezel a substantially constant torque resistant to rotation, while being simple and economical to produce by techniques of classic manufacture in the field.

Un autre but de l'invention consiste à fournir une pièce d'horlogerie comportant une lunette tournante dont le mécanisme est protégé contre les impuretés solides et qui peut ainsi être utilisée dans tout type d'environnement sans que le bon fonctionnement de la lunette en soit affecté.Another object of the invention is to provide a timepiece comprising a rotating bezel whose mechanism is protected against solid impurities and which can thus be used in any type of environment without the proper functioning of the bezel being affected.

A cet effet, l'invention a pour objet une pièce d'horlogerie comportant une boîte ayant une carrure, un fond, une glace montée fixement sur la carrure, une lunette tournante guidée en rotation par rapport à la glace et à la carrure, des moyens de retenue de ladite lunette sur la carrure, et un mécanisme d'encliquetage associé à la lunette comprenant un ressort à cliquets coopérant avec une denture ménagée dans la lunette, caractérisée en ce qu'une garniture d'étanchéité est disposée au-dessus du mécanisme d'encliquetage entre la lunette et la glace, ladite garniture assurant à la fois un centrage de la lunette par rapport à la glace et une retenue par friction contre la rotation de la lunette.To this end, the subject of the invention is a timepiece comprising a case having a middle part, a base, a crystal fixedly mounted on the middle part, a rotating bezel guided in rotation relative to the crystal and the middle part, means for retaining said bezel on the middle part, and a latching mechanism associated with the bezel comprising a ratchet spring cooperating with a toothing formed in the bezel, characterized in that a gasket is arranged above the latching mechanism between the telescope and the glass, the said lining ensuring both centering of the telescope with respect to the glass and friction retention against the rotation of the telescope.

Ainsi, la disposition de la garniture directement entre la lunette et la glace permet d'obtenir un couple résistant à la rotation de la lunette sensiblement constant, qui le cas échéant peut compenser la souplesse du ressort à cliquets dans le cas où les cliquets n'assurent pas une retenue suffisante de la lunette dans son sens de rotation autorisé. En outre, cette disposition particulière de la garniture permet de centrer la lunette par rapport à la glace et ainsi d'avoir une jeu très faible entre ces deux éléments, améliorant par là même la résistance à la pénétration d'impuretés d'une part et l'aspect esthétique de la pièce d'horlogerie d'autre part.Thus, the arrangement of the lining directly between the telescope and the glass makes it possible to obtain a torque that is resistant to rotation of the telescope substantially constant, which if necessary can compensate for the flexibility of the pawl spring in the case where the pawls do not provide sufficient retention of the bezel in its authorized direction of rotation. In addition, this particular arrangement of the lining makes it possible to center the telescope relative to the glass and thus to have a very small clearance between these two elements, thereby improving the resistance to the penetration of impurities on the one hand and the aesthetic appearance of the timepiece on the other hand.

Selon un mode de réalisation particulier de l'invention, la carrure comprend dans sa partie supérieure une manchette et les moyens de retenue comprennent une bague fendue en matière plastique, disposée dans un premier logement formé partiellement dans la lunette et dans la surface extérieure de ladite manchette lorsque la lunette est en place sur la carrure.According to a particular embodiment of the invention, the middle part comprises in its upper part a cuff and the retaining means comprise a split ring of plastic material, disposed in a first housing formed partially in the bezel and in the external surface of said cuff when the bezel is in place on the middle.

Grâce à cette structure, la retenue axiale de la lunette sur la manchette peut être ainsi réalisée de façon aisée et économique à l'aide d'une simple bague fendue.Thanks to this structure, the axial retention of the bezel on the cuff can thus be carried out easily and economically using a simple split ring.

Selon une caractéristique avantageuse de l'invention, la manchette comprend dans sa partie supérieure extérieure une surface tronconique qui se prolonge par une partie cylindrique dans laquelle est ménagée une gorge annulaire radiale, formant partie du premier logement, dans sa partie médiane et par un épaulement dans sa partie inférieure.According to an advantageous characteristic of the invention, the cuff comprises in its outer upper part a frustoconical surface which is extended by a cylindrical part in which is formed a radial annular groove, forming part of the first housing, in its middle part and by a shoulder in its lower part.

Ainsi, la mise en place de la lunette sur la manchette et sa retenue axiale peuvent être simplement réalisées en disposant la bague fendue dans la gorge de la lunette puis en forçant la lunette sur la manchette, la bague fendue s'écartant en passant sur la surface conique. On notera à ce propos que le démontage de la lunette peut être aisément réalisé par la rupture de la bague fendue.Thus, the positioning of the bezel on the cuff and its axial retention can be simply carried out by placing the split ring in the groove of the bezel then by forcing the bezel on the cuff, the split ring spreading passing over the conical surface. It should be noted in this connection that the dismantling of the bezel can be easily carried out by breaking the split ring.

D'autres avantages et caractéristiques de l'invention apparaîtront à la lecture de la description détaillée qui suit d'un exemple de réalisation donnés à titre illustratif et non limitatif en se référant au dessin annexé dans lequel:

  • la figure 1 représente une vue partielle en coupe d'une pièce d'horlogerie selon l'invention;
  • la figure 2 représente une vue partielle de dessus d'un ressort à cliquets utilisé dans la pièce d'horlogerie représentée à la figure 1; et
  • la figure 3 est une vue partielle de côté du ressort à cliquets de la figure 2 montrant plus particulièrement une lame élastique formant un cliquet.
Other advantages and characteristics of the invention will appear on reading the following detailed description of an exemplary embodiment given as illustrative and non-limiting with reference to the attached drawing in which:
  • Figure 1 shows a partial sectional view of a timepiece according to the invention;
  • 2 shows a partial top view of a ratchet spring used in the timepiece shown in Figure 1; and
  • Figure 3 is a partial side view of the pawl spring of Figure 2 showing more particularly an elastic blade forming a pawl.

En se référant aux figures, on décrira ci-après une pièce d'horlogerie selon l'invention, désignée par la référence générale 1.Referring to the figures, a timepiece according to the invention will be described below, designated by the general reference 1.

La pièce d'horlogerie 1 comporte une boîte 2 comprenant une carrure 4, un fond 6 et une glace 8, et dans laquelle est logé un mouvement 10 surmonté d'un cadran 12. Dans l'exemple représenté, la carrure 4 et le fond 6 sont réalisés en une seule pièce métallique.The timepiece 1 comprises a case 2 comprising a middle part 4, a bottom 6 and a crystal 8, and in which is housed a movement 10 surmounted by a dial 12. In the example shown, the middle part 4 and the bottom 6 are made in a single metal piece.

Sur la carrure sont ménagées des cornes de fixation 14 destinées à permettre la liaison de la pièce d'horlogerie avec un bracelet, non représenté.On the middle are provided fixing horns 14 intended to allow the connection of the timepiece with a bracelet, not shown.

Dans cet exemple, la glace 8 est réalisée en matière plastique et est fixée directement, par sa partie inférieure périphérique, sur un rebord 16 en matière synthétique du mouvement 10, par soudage ou collage. Le rebord 16 est par ailleurs pincé entre des portées 18 et 20 respectivement de la carrure 4 et d'une manchette 22 fixée à cran, par sa une lèvre inférieure 24, sur un épaulement de la carrure. Une garniture 26 est intercalée entre le rebord 16 et la portée 18 pour assurer l'étanchéité de la boîte vis-à-vis de l'extérieur. La glace 8 est ainsi fixe par rapport à la carrure 4.In this example, the glass 8 is made of plastic and is fixed directly, by its peripheral lower part, to a flange 16 of synthetic material of the movement 10, by welding or gluing. The rim 16 is moreover pinched between bearing surfaces 18 and 20 respectively of the middle part 4 and of a cuff 22 fixed to the notch, by its a lower lip 24, on a shoulder of the middle part. A gasket 26 is interposed between the flange 16 and the surface 18 to seal the box vis-à-vis the outside. The crystal 8 is thus fixed relative to the middle part 4.

La manchette 22 comprend une surface intérieure cylindrique 28, suivi d'un épaulement formant la portée 20 et d'une partie inférieure cylindrique s'évasant légèrement vers l'extérieur et formant la lèvre 24.The cuff 22 comprises a cylindrical inner surface 28, followed by a shoulder forming the bearing surface 20 and a cylindrical lower part which widens slightly outwards and forms the lip 24.

Dans sa partie supérieure extérieure, la manchette 22 comporte une surface tronconique 30 au-dessus d'une partie cylindrique 32 dans laquelle est ménagée une gorge annulaire radiale 34. Plus bas, la manchette 22 présente un épaulement 36 dans sa partie médiane et se termine par la lèvre 24.In its upper outer part, the cuff 22 has a frustoconical surface 30 above a cylindrical part 32 in which is formed a radial annular groove 34. Below, the cuff 22 has a shoulder 36 in its middle part and ends by lip 24.

La pièce d'horlogerie 1 comprend en outre une lunette tournante 36, par exemple réalisée en métal, qui est guidée en rotation par rapport à la glace 8 et à la carrure 4. La lunette 36 comprend une première portée cylindrique 38 débouchant sur une deuxième portée cylindrique 40 de diamètre supérieur à la première, une denture intérieure axiale 42 en dents de scie, une gorge annulaire radiale 44 et une portée axiale 46.The timepiece 1 further comprises a rotating bezel 36, for example made of metal, which is guided in rotation relative to the crystal 8 and to the middle part 4. The bezel 36 comprises a first cylindrical surface 38 opening onto a second cylindrical bearing 40 of diameter greater than the first, an axial internal toothing 42 in sawtooth, a radial annular groove 44 and an axial bearing 46.

La glace 8 comprend un flanc périphérique muni d'une gorge annulaire 48 et d'un épaulement définissant d'une portée axiale 50. Selon une caractéristique de l'invention, la gorge annulaire reçoit une garniture d'étanchéité 52 et est disposée sensiblement en regard de la portée cylindrique 38. La gorge annulaire 48 a de préférence une section circulaire et la garniture 52 a la forme d'un joint torique en élastomère.The glass 8 comprises a peripheral flank provided with an annular groove 48 and a shoulder defining an axial reach 50. According to a characteristic of the invention, the annular groove receives a sealing gasket 52 and is arranged substantially in view of the cylindrical surface 38. The annular groove 48 preferably has a circular section and the lining 52 has the shape of an elastomer O-ring.

On notera que seules les dimensions des gorges annulaires 40 et 48 doivent être maîtrisée pour obtenir la compression de la garniture désirée ce qui est facilement réalisable à l'aide des techniques de fabrication classique. Il en résulte que le couple résistant à la rotation de la lunette peut être parfaitement maîtrisé.Note that only the dimensions of the annular grooves 40 and 48 must be controlled to obtain the compression of the desired lining which is easily achievable using conventional manufacturing techniques. As a result, the torque resistant to rotation of the bezel can be perfectly controlled.

La surface intérieure cylindrique 28 définit avec ledit épaulement ménagé dans la glace 8 un logement dans lequel est disposé un ressort à cliquets 54.The cylindrical inner surface 28 defines with said shoulder formed in the glass 8 a housing in which is disposed a ratchet spring 54.

Plus précisément, le ressort annulaire à cliquets 54 repose sur la portée axiale de l'épaulement 50 et est maintenu fixe en rotation, par exemple par chassage, ou collage sur la glace ou encore à l'aide d'encoches E prévues dans le ressort et coopérant avec des ergots ou prévus à cet effet dans le flanc de la glace 8, ou inversement.More specifically, the annular pawl spring 54 rests on the axial surface of the shoulder 50 and is kept fixed in rotation, for example by driving, or gluing on the ice or even using E notches provided in the spring. and cooperating with lugs or provided for this purpose in the side of the glass 8, or vice versa.

Le ressort 54 comporte dans l'exemple illustré en particulier aux figures 2 et 3 six cliquets 56 ayant la forme de lames élastiques pouvant se fléchir axialement et coopérer avec la denture 42 de la lunette 36, formant ainsi le mécanisme d'encliquetage avec lequel coopère la lunette 26.The spring 54 comprises in the example illustrated in particular in Figures 2 and 3 six pawls 56 in the form of elastic blades which can bend axially and cooperate with the teeth 42 of the bezel 36, thereby forming the latching mechanism with which cooperates bezel 26.

Dans l'exemple représenté le ressort à cliquets 54 et plus particulièrement, les cliquets 56, sont réalisés en matière plastique. Cela présente l'avantage d'éliminer tout risque de blessure de la denture 42 de la lunette 36 lors de la rotation de la lunette, notamment lorsque cette dernière est réalisé en un matériau métallique "tendre" tel que l'aluminium ou en un alliage à base d'aluminium. Le ressort 54 est réalisé par exemple en une matière plastique ayant une limite d'élasticité élevée et de préférence comprise entre 160 et 200 MPa. A titre d'exemple, un polyamide 6.6 chargé à 40% de fibre de carbone vendu par la société Hoechst sous la dénomination Celanese Nylon est parfaitement adapté.In the example shown the pawl spring 54 and more particularly, the pawls 56, are made of plastic. This has the advantage of eliminating any risk of injury to the teeth 42 of the telescope 36 during the rotation of the telescope, in particular when the latter is made of a "soft" metallic material such as aluminum or an alloy based on aluminum. The spring 54 is made for example of a plastic material having a high elastic limit and preferably between 160 and 200 MPa. For example, a polyamide 6.6 loaded with 40% carbon fiber sold by the company Hoechst under the name Celanese Nylon is perfectly suitable.

Comme le coefficient de frottement de la matière plastique sur le métal est par nature relativement faible, on notera à ce propos que le couple nécessaire pour faire tourner la lunette dans le sens de rotation autorisé par les cliquets dépend essentiellement des forces de friction mises en jeu entre la glace 8 et la garniture d'étanchéité 52, d'une part, et cette dernière et la lunette 36, d'autre part.As the coefficient of friction of the plastic on the metal is by nature relatively low, it should be noted in this connection that the torque necessary to rotate the telescope in the direction of rotation authorized by the pawls depends essentially on the friction forces involved between the glass 8 and the seal 52, on the one hand, and the latter and the bezel 36, on the other hand.

Selon une caractéristique de l'invention, la garniture d'étanchéité 52 est prévue au dessus du mécanisme d'encliquetage de la lunette 36, de sorte que ce dernier est protégé contre la pénétration de toute impureté solide pouvant endommager ce mécanisme lors de la rotation de la lunette 36.According to a characteristic of the invention, the seal 52 is provided above the latching mechanism of the telescope 36, so that the latter is protected against the penetration of any solid impurity which may damage this mechanism during rotation bezel 36.

Le centrage de la lunette 36 est réalisée directement sur la glace 8, par la garniture d'étanchéité 52. Ainsi, le jeu 58 compris entre la portée cylindrique 38 de la lunette 36 et la glace 8 peut être très petit et par exemple compris entre 0,10 mm et 0,20 mm au rayon. Le risque d'entrée de corps étrangers dans cet interstice est donc pratiquement exclu. Par ailleurs, ce centrage de la lunette à l'aide de la garniture permet de quasiment de supprimer tout ébat radial de la lunette conférant ainsi à la montre équipée de la lunette une impression de qualité élevée.The bezel 36 is centered directly on the crystal 8, by the seal 52. Thus, the clearance 58 between the cylindrical surface 38 of the telescope 36 and the glass 8 can be very small and for example between 0.10 mm and 0.20 mm at the radius. The risk of foreign bodies entering this gap is therefore practically excluded. Furthermore, this centering of the bezel using the gasket makes it possible to virtually eliminate any radial deflection of the bezel, thus giving the watch equipped with the bezel an impression of high quality.

La lunette 36 comprend en outre des moyens de retenue axiale sur la carrure 4. Ces moyens de retenue comprennent une bague fendue 60 disposée dans un logement formé partiellement dans la lunette 36 et dans la surface extérieure de la manchette 22 lorsque la lunette 36 est en place sur la carrure 4. Plus précisément, la bague fendue 60 est une bague en matière plastique ayant une section transversale rectangulaire, sa dimension radiale étant supérieure à sa dimension axiale et que l'on désigne généralement par bague élastique "plate". Pour la réalisation de la bague fendue, on choisira de préférence une matière plastique ayant une résistance au cisaillement élevée. Une matière identique à celle du ressort à cliquets est parfaitement adaptée.The bezel 36 further comprises axial retaining means on the middle part 4. These retaining means comprise a split ring 60 disposed in a housing formed partially in the bezel 36 and in the outer surface of the cuff 22 when the bezel 36 is in place on the middle part 4. More specifically, the split ring 60 is a plastic ring having a rectangular cross section, its radial dimension being greater than its axial dimension and which is generally designated by elastic ring "flat". For the production of the split ring, a plastic material preferably having a high shear strength will be chosen. A material identical to that of the ratchet spring is perfectly suited.

Le logement présente donc une section rectangulaire et est formé par les gorges annulaires radiales 34 et 44 ménagées respectivement dans la manchette 22 et dans la lunette 36, en regard l'une de l'autre, la bague fendue 60 étant montée dans ce logement de façon qu'elle s'étende, dans sa position normale représentée à la figure 1, à la fois dans la gorge 34 de la manchette et dans la gorge 44 de la lunette 22. Elle bénéficie toutefois d'un jeu radial lui permettant de s'escamoter dans la gorge 44 par expansion élastique.The housing therefore has a rectangular section and is formed by the radial annular grooves 34 and 44 formed respectively in the cuff 22 and in the bezel 36, facing each other, the split ring 60 being mounted in this housing. so that it extends, in its normal position shown in Figure 1, both in the groove 34 of the cuff and in the groove 44 of the bezel 22. However, it benefits from a radial clearance allowing it to s 'retract into the groove 44 by elastic expansion.

Pour procéder au montage de la lunette 36 sur la carrure 4, on met tout d'abord en place le ressort à cliquets 54 sur la portée 50 de la glace 8, on installe ensuite la garniture 52 dans la gorge annulaire 48, puis on engage la lunette 36 par pression sur la manchette 22, la bague fendue 60 ayant été préalablement disposée dans la gorge annulaire 44 de la lunette 36 avec un certain jeu radial. A ce moment, la face intérieure de la bague 60 vient en contact avec la surface tronconique 30 et glisse sur celle-ci en s'écartant élastiquement jusqu'à ce qu'elle arrive en regard de la gorge 34 dans laquelle elle peut se détendre. Une fois détendue, le bague fendue 60 s'étend partiellement dans les gorges 34 et 44 et la portée axiale 46 de la lunette vient pratiquement en contact avec la portée de l'épaulement 36 de la manchette.To mount the bezel 36 on the middle part 4, first put in place the ratchet spring 54 on the surface 50 of the glass 8, then install the gasket 52 in the annular groove 48, then the bezel 36 is engaged by pressing on the cuff 22, the split ring 60 having been previously disposed in the annular groove 44 of the bezel 36 with a certain radial clearance. At this time, the inner face of the ring 60 comes into contact with the frustoconical surface 30 and slides thereon, moving away from it elastically until it comes into contact with the groove 34 in which it can relax . Once relaxed, the split ring 60 extends partially in the grooves 34 and 44 and the axial bearing 46 of the bezel comes into practicable contact with the bearing of the shoulder 36 of the cuff.

Une fois mise en place, la lunette ne peut être démontée que par une traction axiale entraînant la rupture de la bague fendue. Cette pièce peu coûteuse sera remplacée lors du remontage de la lunette.Once in place, the bezel can only be dismantled by an axial pull causing the split ring to break. This inexpensive part will be replaced during reassembly of the bezel.

Claims (13)

Pièce d'horlogerie comportant une boîte (2) ayant une carrure (4), un fond (6), une glace (8) montée fixement par rapport à la carrure (4), une lunette tournante (36) guidée en rotation par rapport à la glace (8) et à la carrure (4), des moyens de retenue (60) de ladite lunette (36) sur la carrure (4), et un mécanisme d'encliquetage (52, 54, 56) associé à la lunette (36) comprenant un ressort à cliquets (54,56) coopérant avec une denture (42) ménagée dans la lunette (36), caractérisée en ce qu'une garniture d'étanchéité (52) est disposée au-dessus du mécanisme d'encliquetage (52, 54, 56) entre la lunette (36) et la glace (8), ladite garniture assurant à la fois un centrage de la lunette par rapport à la glace et une retenue par friction contre la rotation de la lunette (36).Timepiece comprising a case (2) having a middle part (4), a base (6), a crystal (8) fixedly mounted relative to the middle part (4), a rotating bezel (36) guided in rotation relative to to the crystal (8) and to the middle part (4), retaining means (60) of said bezel (36) on the middle part (4), and a latching mechanism (52, 54, 56) associated with the bezel (36) comprising a ratchet spring (54,56) cooperating with a toothing (42) formed in the bezel (36), characterized in that a seal (52) is disposed above the mechanism 'snap-fastening (52, 54, 56) between the telescope (36) and the glass (8), said lining ensuring both centering of the telescope relative to the glass and a friction retainer against the rotation of the telescope ( 36). Pièce d'horlogerie selon la revendication 1, dans laquelle la carrure (4) comprend dans sa partie supérieure une manchette (22), caractérisée en ce que les moyens de retenue (60) comprennent une bague fendue en matière plastique disposée dans un premier logement (34, 44) formé partiellement dans la lunette (36) et dans la surface extérieure de ladite manchette (22) lorsque la lunette (36) est en place sur la carrure (4).Timepiece according to claim 1, in which the middle part (4) comprises in its upper part a cuff (22), characterized in that the retaining means (60) comprise a split plastic ring arranged in a first housing (34, 44) partially formed in the bezel (36) and in the outer surface of said cuff (22) when the bezel (36) is in place on the middle part (4). Pièce d'horlogerie selon la revendication 2, caractérisée en ce que ladite manchette (22) comprend dans sa partie supérieure extérieure une surface tronconique (30) qui se prolonge par une partie cylindrique (32) dans laquelle est ménagée une gorge annulaire radiale (34), formant une partie du premier logement (34, 44), et par un épaulement (36).Timepiece according to claim 2, characterized in that said cuff (22) comprises in its outer upper part a frustoconical surface (30) which is extended by a cylindrical part (32) in which is formed a radial annular groove (34 ), forming a part of the first housing (34, 44), and by a shoulder (36). Pièce d'horlogerie selon l'une des revendications 2 ou 3 dans laquelle la glace (8) comprend une partie inférieure solidaire de la boîte, caractérisée en ce que ledit ressort à cliquets (54, 56) est disposé dans un deuxième logement formé partiellement dans la périphérie extérieure de la glace (8) et la surface intérieure (28) de la manchette (22).Timepiece according to one of claims 2 or 3 in which the crystal (8) comprises a lower part integral with the box, characterized in that said ratchet spring (54, 56) is disposed in a second housing formed partially in the outskirts outer surface of the crystal (8) and the inner surface (28) of the cuff (22). Pièce d'horlogerie selon l'une des revendications 2 à 4, caractérisée en ce que la périphérie extérieure de la glace comprend un épaulement 50 sur lequel repose axialement ledit ressort à cliquets (54, 56) et en ce que la surface intérieure (28) de la manchette (22) est cylindrique.Timepiece according to one of claims 2 to 4, characterized in that the outer periphery of the crystal comprises a shoulder 50 on which said pawl spring (54, 56) rests axially and in that the inner surface (28 ) of the cuff (22) is cylindrical. Pièce d'horlogerie selon la revendication 4 ou 5 caractérisée en ce que le ressort à cliquets (54, 56) est bloqué en rotation sur la glace (8) au moyen d'ergots.Timepiece according to claim 4 or 5 characterized in that the ratchet spring (54, 56) is locked in rotation on the glass (8) by means of lugs. Pièce d'horlogerie selon l'une des revendications précédentes caractérisée en ce que la glace (8) comprend, dans sa partie supérieure une gorge annulaire (48) dans laquelle est disposée la garniture (52) et en ce que la garniture (52) coopère avec une portée cylindrique (40) de la lunette (36).Timepiece according to one of the preceding claims, characterized in that the crystal (8) comprises, in its upper part, an annular groove (48) in which the lining (52) is disposed and in that the lining (52) cooperates with a cylindrical surface (40) of the telescope (36). Pièce d'horlogerie selon l'une des revendications 2 à 7, caractérisée en ce que la lunette (36) comprend une gorge annulaire (44) radiale formant une partie du premier logement.Timepiece according to one of claims 2 to 7, characterized in that the bezel (36) comprises an annular groove (44) radial forming a part of the first housing. Pièce d'horlogerie selon les revendications 7 et 8, caractérisée en ce que les gorges annulaires (34, 44) de la lunette (36) et de la manchette (22) présentent respectivement une section transversale rectangulaire.Timepiece according to claims 7 and 8, characterized in that the annular grooves (34, 44) of the bezel (36) and the cuff (22) have respectively a rectangular cross section. Pièce d'horlogerie selon la revendication 2, caractérisée en ce que ladite bague fendue (60) est une bague plate.Timepiece according to claim 2, characterized in that said split ring (60) is a flat ring. Pièce d'horlogerie selon l'une des revendications précédentes, caractérisée en ce que les moyens de retenue (60) et le ressort à cliquets (54, 56) sont respectivement réalisés dans une matière plastique ayant une limite élastique et une résistance au cisaillement élevées.Timepiece according to one of the preceding claims, characterized in that the retaining means (60) and the ratchet spring (54, 56) are respectively made of a plastic material having a high yield strength and high shear strength . Pièce d'horlogerie selon la revendication 2, caractérisée en ce que la manchette (22) est rapportée sur la carrure (4), de préférence par un montage à cran.Timepiece according to claim 2, characterized in that the cuff (22) is attached to the middle part (4), preferably by a notched mounting. Pièce d'horlogerie selon l'une des revendications précédentes, caractérisée en ce que la lunette (26) est réalisée à base d'aluminium.Timepiece according to one of the preceding claims, characterized in that the bezel (26) is made from aluminum.
EP96116304A 1995-10-27 1996-10-11 Timepiece provided with a rotatable bezel Expired - Lifetime EP0770937B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CH303595 1995-10-27
CH03035/95A CH689955A5 (en) 1995-10-27 1995-10-27 Timepiece including a rotating bezel.
CH3035/95 1995-10-27
EP96101321 1996-01-31
EP96101321 1996-01-31

Publications (2)

Publication Number Publication Date
EP0770937A1 true EP0770937A1 (en) 1997-05-02
EP0770937B1 EP0770937B1 (en) 2000-01-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96116304A Expired - Lifetime EP0770937B1 (en) 1995-10-27 1996-10-11 Timepiece provided with a rotatable bezel

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EP (1) EP0770937B1 (en)
DE (1) DE69606374T2 (en)
HK (1) HK1013340A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7182508B2 (en) 2003-09-03 2007-02-27 Rolex S.A. Linking device between a rim and a case of watch
US7478945B2 (en) 2005-02-23 2009-01-20 Petra Damasko Watch case and wristwatch with such a case
EP2360537A1 (en) * 2010-02-15 2011-08-24 ETA SA Manufacture Horlogère Suisse Method and device for fixing a sheet of glass with counter-blade
CN103472709A (en) * 2012-06-06 2013-12-25 奥米加股份有限公司 Improved rotating bezel system
EP3543799A1 (en) * 2018-03-20 2019-09-25 Omega SA Annular ring for holding a rotating bezel system
US11243496B2 (en) 2018-08-08 2022-02-08 Omega Sa Annular rotating bezel system comprising a spring ring provided with at least two lugs

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH341769A (en) * 1959-02-27 1959-10-15 Enicar S A Timepiece with rotating bezel and method for its manufacture
US3662537A (en) * 1968-12-10 1972-05-16 Suwa Seikosha Kk Construction of rotating bezel section for watch cases
JPS5296056A (en) * 1976-02-09 1977-08-12 Seiko Epson Corp Material for watch case
DE3100791A1 (en) * 1981-01-13 1982-08-05 Porsche, Ferdinand Alexander, 5662 Gries, Pinzgau Diving watch
EP0216420A1 (en) * 1985-09-24 1987-04-01 Remy Montavon S.A. Watch with a rotating bezel
EP0573386A1 (en) * 1992-06-02 1993-12-08 Mondaine Watch Ltd Watch with a rotating bezel

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH341769A (en) * 1959-02-27 1959-10-15 Enicar S A Timepiece with rotating bezel and method for its manufacture
US3662537A (en) * 1968-12-10 1972-05-16 Suwa Seikosha Kk Construction of rotating bezel section for watch cases
JPS5296056A (en) * 1976-02-09 1977-08-12 Seiko Epson Corp Material for watch case
DE3100791A1 (en) * 1981-01-13 1982-08-05 Porsche, Ferdinand Alexander, 5662 Gries, Pinzgau Diving watch
EP0216420A1 (en) * 1985-09-24 1987-04-01 Remy Montavon S.A. Watch with a rotating bezel
EP0573386A1 (en) * 1992-06-02 1993-12-08 Mondaine Watch Ltd Watch with a rotating bezel

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* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 7738, Derwent World Patents Index; AN 77-67840Y, XP002003206 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7182508B2 (en) 2003-09-03 2007-02-27 Rolex S.A. Linking device between a rim and a case of watch
US7478945B2 (en) 2005-02-23 2009-01-20 Petra Damasko Watch case and wristwatch with such a case
EP2360537A1 (en) * 2010-02-15 2011-08-24 ETA SA Manufacture Horlogère Suisse Method and device for fixing a sheet of glass with counter-blade
US8505196B2 (en) 2010-02-15 2013-08-13 Eta Sa Manufacture Horlogère Suisse Method and device for securing a crystal with a counter strip
CN103472709A (en) * 2012-06-06 2013-12-25 奥米加股份有限公司 Improved rotating bezel system
EP3543799A1 (en) * 2018-03-20 2019-09-25 Omega SA Annular ring for holding a rotating bezel system
US11314207B2 (en) 2018-03-20 2022-04-26 Omega Sa Annular retaining ring for a rotating bezel system
US11243496B2 (en) 2018-08-08 2022-02-08 Omega Sa Annular rotating bezel system comprising a spring ring provided with at least two lugs

Also Published As

Publication number Publication date
EP0770937B1 (en) 2000-01-26
DE69606374D1 (en) 2000-03-02
HK1013340A1 (en) 1999-08-20
DE69606374T2 (en) 2000-08-24

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