EP0186804B1 - Wrist-mounted electronic device - Google Patents

Wrist-mounted electronic device Download PDF

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Publication number
EP0186804B1
EP0186804B1 EP85115438A EP85115438A EP0186804B1 EP 0186804 B1 EP0186804 B1 EP 0186804B1 EP 85115438 A EP85115438 A EP 85115438A EP 85115438 A EP85115438 A EP 85115438A EP 0186804 B1 EP0186804 B1 EP 0186804B1
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EP
European Patent Office
Prior art keywords
contacts
bracelet
case
foot
arrangement according
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.)
Expired - Lifetime
Application number
EP85115438A
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German (de)
French (fr)
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EP0186804A1 (en
Inventor
Jean-Philippe Rebeaud
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
Original Assignee
Eta SA Fabriques dEbauches
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Application filed by Eta SA Fabriques dEbauches filed Critical Eta SA Fabriques dEbauches
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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G17/00—Structural details; Housings
    • G04G17/02—Component assemblies
    • G04G17/06—Electric connectors, e.g. conductive elastomers
    • 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
    • G04B37/14—Suspending devices, supports or stands for time-pieces insofar as they form part of the case
    • G04B37/1486—Arrangements for fixing to a bracelet
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G17/00—Structural details; Housings
    • G04G17/08—Housings
    • G04G17/083—Watches distributed over several housings

Definitions

  • the present invention relates to electronic devices intended to be worn on the wrist of a user. More specifically, the invention relates to an electrical junction device between the parts of a circuit located respectively in the case and the bracelet of an electronic device intended to be worn on the wrist, in which, in each electrical path between said parts, is inserted a set of separable conjugate contacts but maintained applied one on the other, each set of contacts having at least partially a symmetry of revolution defining an axis.
  • Such a joining device is described in document GB-A-1 555 848.
  • This device comprises a block provided with holes in which are placed contact springs.
  • the bracelet provided with conductors has one end which is received inside the case and which is in contact with one face of the block so that each spring can come into contact with a conductor of the bracelet.
  • the opposite face of the block is in contact with an insulating part in which there are complementary conductors leading to the internal circuits of the electronic device.
  • the case thereof is in two parts assembled together, this assembly making it possible to tighten the block with the springs between the end of the bracelet and the insulating part.
  • the invention aims to remedy these drawbacks.
  • a device of the type defined above which is characterized in that the contacts are applied to one another by a latching force directed along said axis and in that they are surrounded by two complementary abutment surfaces provided one on the bracelet and the other on the case and applied one to the other by virtue of the presence of said snap-on force to protect the contacts from harmful influences coming from the outside, and in that one of the contacts of the contact set is a conductive pin anchored in the box or the bracelet and penetrating into an opening of the bracelet or respectively of the box, the latter or the latter and said conductive pin having complementary annular surfaces to ensure the latching.
  • the bracelet can easily be disassembled and reassembled without there being a risk of poor contact or deterioration in the quality of the seal protecting the contacts against harmful effects coming from the outside.
  • junction device It is thus possible to always ensure perfect sealing of the case and total insulation of the electrical contacts from the outside.
  • This latter property of the junction device according to the invention therefore protects the contacts from any harmful influence liable to cause corrosion which can be caused for example by the proximity of the skin of the user. The longevity of the contacts is therefore ensured.
  • connection device for a watch in which the bracelet comprises an antenna formed by a conductive tape.
  • the bracelet comprises an antenna formed by a conductive tape.
  • On this ribbon comes to bear a contact piece under the action of a locking system of the watch case which is articulated on a strand of the bracelet.
  • this device there is therefore no set of contacts associated with an elastic latching arrangement whose latching force acts in the direction of a better contact pressure.
  • FIGS. 1, 2 and 2A relates to a box B associated with a bracelet BR between which several electrical paths must be established, at the level of the separation between these two elements, by junction devices according to the invention, these devices being designated as a whole by the reference 1.
  • the box B contains the electrical or electromechanical circuit of a timepiece, but it should be emphasized that the invention applies in all cases where an electronic device is associated with a bracelet which includes one or more components to be associated with the circuit which is located in the case B.
  • this box contains a printed electrical circuit CI provided with an integrated circuit (not shown) and a display device DA, the box being closed by a glass G.
  • the junction device comprises sets of contacts 2 composed of a rigid conductive element 3 and of an elastic conductive element 4.
  • the first of these contacts is here a conductive pin of generally cylindrical shape with an axis X-X.
  • This pin has an outer surface composed of several portions which are, seen from top to bottom in FIG. 2A, a bearing 5 separated from a bearing 6 by a radial shoulder 7, a frustoconical portion 8 followed by a cylindrical portion 9, a bearing surface 10 separated from the cylindrical portion 9 by a shoulder 11, a portion 12 in the form of a "diabolo" having in particular two inclined surfaces 12a and 12b between which is provided a cylindrical surface 12c, a cylindrical portion 13 and finally a point 14 of general conical shape.
  • This relatively tormented shape of the outer surface of the pin is intended, in the area where this pin is fixed in the housing B, to ensure an integrity seal, in order to isolate the exterior of the interior cavity thereof.
  • the housing has a hole 15 with surface portions complementary to those of the corresponding part of the pin, but which it is unnecessary to describe in detail here.
  • the final shape of the hole 15 of the housing through which the pin 3 extends is obtained during the positioning thereof which, preferably, is carried out by the application of ultrasound.
  • this seal can be perfected by pouring a small amount of a polymerizable material around the top of the pin 3, after the pin has been put in place, this material being sucked by capillary action around the surface 5 in order to close all interstices. possibly remaining around the body of the pin inserted in the housing B.
  • the portions 12a, 12b and 12c are intended to ensure the joining by elastic snap-fastening of the joining device.
  • the end of the bracelet BR is shaped so as to define a cavity 16, into which the lower part of the pin 3 can penetrate.
  • the part of the junction device housed in the bracelet comprises four function keys generally designated by the references Ta to Td which can trigger in the circuit CI the functions "Watch”, “Alarm”, “Chronograph” and "Timer”.
  • the half-bracelet shown has two strips 17a and 17b made of a flexible plastic material, the strip 17b fitting into a recess 18 provided in the end part of the strip 17a close to the housing B.
  • This recess has a thickness which is roughly equal to half the total thickness of the strip 17a.
  • This is made integral with the strip 17b, by gluing for example, an adhesive being provided for this purpose (in 19) over the entire periphery of the strip 17b.
  • This strip 17b is also provided with a set of conductors 20 which can be affixed thereto by screen printing for example. This set of conductors is provided on the face of the strip 17b facing the strip 17a.
  • FIG. 3 shows that the set of conductors defines four fixed contacts each produced in the form of two combs 21 a to 21 d respectively associated with mobile contacts formed by metallizations 22 (only the metallization of the Td key appearing clearly on the figure 1).
  • Each set of a fixed contact and a movable contact forms a switch which is closed when, by finger pressure, the zone corresponding to a given key is deformed and the metallization 22 pressed on the corresponding nested combs.
  • FIG. 3 it is also clearly seen that the pairs of combs 21a to 21d are connected to conductors 24a to 24e, it being understood that the conductor 24a is common to all the pairs of combs 21a to 21d.
  • Each of the conductors 24a to 24e extends towards the end of the strip 17b to end in a terminal 25.
  • the metallization 22 connects to one another the two combs corresponding to this key, which establishes a short circuit between the conductor 24a on the one hand and one of the conductors 24b to 24e on the other hand, the two corresponding terminals 25 are then connected to each other.
  • the strip 17a also comprises a thickened zone 26, of convex shape, in which is provided a transverse opening 27 intended to receive a pin 28 by means of which the bracelet is articulated to the case B, the latter comprising for this purpose a shape adapted to the boss 26 (see in particular Figure 2). It should be noted that the articulation between the case B and the bracelet BR is only partially shown, its shape being moreover conventional.
  • Each of these devices therefore comprises, centered on the axis XX an annular rib 29 having a frustoconical outer surface 30, to which corresponds a frustoconical complementary surface 31 provided in the housing B and which therefore constitutes a portion of the wall of the hole 15 of this one.
  • annular rib 29 having a frustoconical outer surface 30, to which corresponds a frustoconical complementary surface 31 provided in the housing B and which therefore constitutes a portion of the wall of the hole 15 of this one.
  • the annular rib 29 thus delimits the cavity 16 described above, the mouth of which is formed by a flange 32.
  • the radial section of the latter has a V shape, the point of which is directed towards the axis X-X.
  • one of the branches of this V that is to say that which is closest to the free end of the pin 3, is inclined relative to the radial plane passing through the tip of the V by 30 °, the other branch being 60 °.
  • the insertion of the pin 3 in the cavity 16 first produces a deformation of the rib 32 at the passage of the portion 13, then an elastic snap-fastening when this flange 32 enters the groove delimited by the portions 12a to 12c of the pin 3.
  • the dimensions of the parts have been chosen such that the surfaces 30 and 31 are applied closely to each other, the rib 29 being pulled axially upwards (force F indicated in FIG. 2). To this is added that the frustoconical surfaces 30 and 31 shrink in a direction which corresponds to that in which the latching force acts.
  • the contact clearances are provided in a zone of the bracelet which is situated at one end which extends beyond the articulation of the bracelet with respect to its main strand, said force is in a way increased by a force. which results from the couple created around the axis 27 by the natural curvature of the bracelet when the electronic device is worn on the wrist. It therefore follows that the cavity 16 in which the electrical contact is established is perfectly isolated from the outside.
  • connection block 33 which constitutes an elastomeric connector composed of alternately conductive and insulating zones and made of a flexible material such as silicone, the conductive zones being charged by carbon particles. It is therefore understood that these conductive zones can establish an electrical connection between the terminals 25 and the ends of the pins 3, the latter slightly deforming the contact block 33 where they are applied to the latter. It should be noted that the elasticity of the block 33 contributes to a good contact pressure thanks to the deformation that this block undergoes during the assembly of the junction devices.
  • abutment surfaces 30 and 31 have a frustoconical shape coaxial with the axis XX, their conicity being rotated so that they are applied to one another with an even greater force that the holding force of the pin in the cavity 16 is greater.
  • the joining device comprises conductive pins 34 whose end, instead of having a hollow profile, has a larger diameter than the rest of the pin, in order to ensure the snap-fastening in an annular groove inner 35 that has the rib 29. It is understood that this arrangement has the same effects as those resulting from the junction device described above, the surfaces 30 and 31 being applied to each other in the same way.
  • FIG. 5 it is an inverted arrangement in the sense that a pin 36 is provided in a conductive material which is anchored by a flange 37 in a cavity 38 formed in the rib 29 of the coverslip 17a.
  • This pin is also immobilized by the strip 17b which, as previously described, is glued to the strip 17a.
  • the upper part of the pin 36 has a boss 39 of circular section and of a shape roughly identical to that of the end of the pin 34 in FIG. 4, this boss being inserted in an opening 40 provided in the housing, l elastic snap being obtained by the fact that the boss 39 has a diameter greater than that of the opening 40.
  • the surfaces 30 and 31 formed respectively on the rib 29 of the bracelet BR and on the case B are applied one on the other by the force generated by the elastic snap.
  • the boss 39 is applied against a contact block 41 which is housed in the case instead of being in the bracelet.
  • the variant shown in Figure 6 differs from the previous embodiment in that the sealing surfaces 30 and 31 are not provided individually for each junction device, but on the contrary are common to all of them.
  • a rib 50 is provided which goes around a row of holes 51 aligned along the end edge of the tongue 17a of the bracelet BR, a complementary arrangement being provided on the case B. elastic, on the contrary, is obtained individually for each pawn.
  • Fig. 6 can be of reverse design, that is to say with the pin on the bracelet and the rib on the case.
  • the strip 17b has reinforcement zones 55 separated by transverse grooves 56 and intended to reinforce the bracelet opposite the keys Ta to Td, this in order to avoid the risk of untimely contact due to the curvature of the bracelet.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Abstract

The connection arrangement of this invention includes one or several sets of electrical contacts, respectively within the case of an electronic appliance and the bracelet thereof. These contacts are separable by virtue of being associated with elastic latching means. Moreover they are surrounded by a complementary abutment surfaces which protect them from all damaging influence coming from the exterior (in particular that resulting from corrosive substances which may be exuded by the wrist). These surfaces are firmly applied to one another by the latching force of the contacts. The invention may be applied in particular to any timepiece having a bracelet.

Description

La présente invention concerne les dispositifs électroniques destinés à être portés au poignet d'un utilisateur. Plus précisément, l'invention est relative à un dispositif de jonction électrique entre les parties d'un circuit situées respectivement dans le boîtier et le bracelet d'un dispositif électronique destiné à être porté au poignet, dans lequel, dans chaque trajet électrique entre lesdites parties, est inséré un jeu de contacts conjugués séparables mais maintenus appliqués l'un sur l'autre, chaque jeu de contacts présentant au moins partiellement une symétrie de révolution définissant un axe.The present invention relates to electronic devices intended to be worn on the wrist of a user. More specifically, the invention relates to an electrical junction device between the parts of a circuit located respectively in the case and the bracelet of an electronic device intended to be worn on the wrist, in which, in each electrical path between said parts, is inserted a set of separable conjugate contacts but maintained applied one on the other, each set of contacts having at least partially a symmetry of revolution defining an axis.

Un tel dispositif de jonction est décrit dans le document GB-A-1 555 848. Ce dispositif comprend un bloc pourvu de trous dans lesquels sont placés des ressorts de contact. Le bracelet pourvu de conducteurs comporte une extrémité qui est reçue à l'intérieur du boîtier et qui est en contact avec une face du bloc de manière que chaque ressort puisse venir en contact avec un conducteur du bracelet. La face opposée du bloc est en contact avec une pièce isolante dans laquelle se trouve des conducteurs complémentaires menant aux circuits intérieurs du dispositif électronique. Le boîtier de celui-ci est en deux parties assemblées l'une à l'autre, cet ensemble permettant de serrer le bloc avec les ressorts entre l'extrémité du bracelet et la pièce isolante.Such a joining device is described in document GB-A-1 555 848. This device comprises a block provided with holes in which are placed contact springs. The bracelet provided with conductors has one end which is received inside the case and which is in contact with one face of the block so that each spring can come into contact with a conductor of the bracelet. The opposite face of the block is in contact with an insulating part in which there are complementary conductors leading to the internal circuits of the electronic device. The case thereof is in two parts assembled together, this assembly making it possible to tighten the block with the springs between the end of the bracelet and the insulating part.

Cet agencement présente plusieurs inconvénients. Ainsi, il ne peut pas être facilement démonté, car pour enlever le bracelet, il faut nécessairement démonter le boîtier. En outre, ce démontage effectué, on se trouve confronté à plusieurs pièces détachées, notamment les petits ressorts de contact qui risquent de se perdre, par exemple. Enfin, la pression de contact est tributaire de la force des ressorts et du degré de serrage avec lequel les deux parties de la boîte sont assemblées.This arrangement has several drawbacks. Thus, it cannot be easily disassembled, because to remove the bracelet, it is necessary to disassemble the case. In addition, this disassembly carried out, we are confronted with several spare parts, in particular the small contact springs which risk being lost, for example. Finally, the contact pressure is dependent on the force of the springs and the degree of tightening with which the two parts of the box are assembled.

L'invention a pour but de remédier à ces inconvénients.The invention aims to remedy these drawbacks.

Elle a donc pour objet un dispositif du type défini ci-dessus qui est caractérisé en ce que les contacts sont appliqués l'un sur l'autre par une force d'encliquetage dirigée selon ledit axe et en ce qu'ils sont entourés de deux surfaces de butée complémentaires prévues l'une sur le bracelet et l'autre sur le boîtier et appliquées l'une sur l'autre en vertu de la présence de ladite force d'encliquetage pour protéger les contacts vis-à-vis des influences nuisibles venant de l'extérieur, et en ce que l'un des contacts du jeu de contacts est un pion conducteur ancré dans la boîte ou le bracelet et pénétrant dans une ouverture du bracelet ou respectivement de la boîte, celle-ci ou celui-ci et ledit pion conducteur présentant des surfaces annulaires complémentaires pour assurer l'encliquetage.It therefore relates to a device of the type defined above which is characterized in that the contacts are applied to one another by a latching force directed along said axis and in that they are surrounded by two complementary abutment surfaces provided one on the bracelet and the other on the case and applied one to the other by virtue of the presence of said snap-on force to protect the contacts from harmful influences coming from the outside, and in that one of the contacts of the contact set is a conductive pin anchored in the box or the bracelet and penetrating into an opening of the bracelet or respectively of the box, the latter or the latter and said conductive pin having complementary annular surfaces to ensure the latching.

Grâce à ces caractéristiques, le bracelet peut facilement être démonté et remonté sans qu'il y ait un risque de mauvais contact ou de détérioration de la qualitê de l'étanchéité protégeant les contacts contre les effets nocifs venant de l'extérieur.Thanks to these characteristics, the bracelet can easily be disassembled and reassembled without there being a risk of poor contact or deterioration in the quality of the seal protecting the contacts against harmful effects coming from the outside.

Il est ainsi possible d'assurer toujours une parfaite étanchéité du boîtier et une isolation totale des contacts électriques par rapport à l'extérieur. Cette dernière propriété du dispositif de jonction suivant l'invention protège donc les contacts de toute influence néfaste risquant d'entraîner une corrosion qui peut être engendrée par exemple par la proximité de la peau de l'utilisateur. La longévité des contacts est donc assurée.It is thus possible to always ensure perfect sealing of the case and total insulation of the electrical contacts from the outside. This latter property of the junction device according to the invention therefore protects the contacts from any harmful influence liable to cause corrosion which can be caused for example by the proximity of the skin of the user. The longevity of the contacts is therefore ensured.

D'après le document FR-A-2 284149, on connaît une montre à modules fonctionnels enfichables dans laquelle les modules sont assemblés par des éléments assurant un encliquetage élastique. Toutefois, dans ce cas, la pression du contact électrique entre deux modules n'est pas dirigé selon la force d'encliquetage de sorte que la bonne qualité du contact électrique ne peut être garantie surtout après démontage et remontage de la montre.From document FR-A-2 284149, a watch with plug-in functional modules is known in which the modules are assembled by elements ensuring elastic snap-fastening. However, in this case, the pressure of the electrical contact between two modules is not directed according to the latching force so that the good quality of the electrical contact cannot be guaranteed especially after disassembly and reassembly of the watch.

On connaît par ailleurs, d'après le document EP-A-0 125 930 un dispositif de connexion pour montre dans lequel le bracelet comporte une antenne formée par un ruban conducteur. Sur ce ruban vient s'appuyer une pièce de contact sous l'action d'un système de verrouillage du boîtier de la montre qui est articulé sur un brin du bracelet. Dans ce dispositif, on ne retrouve donc aucun jeu de contacts associé à un agencement à enclenchement élastique dont la force d'encliquetage agit dans le sens d'une meilleure pression de contact.Furthermore, from document EP-A-0 125 930, a connection device for a watch is known, in which the bracelet comprises an antenna formed by a conductive tape. On this ribbon comes to bear a contact piece under the action of a locking system of the watch case which is articulated on a strand of the bracelet. In this device, there is therefore no set of contacts associated with an elastic latching arrangement whose latching force acts in the direction of a better contact pressure.

Le document US-A-3 977 176 décrit une montre dont la pile est logée dans un boîtier séparé d'un second boîtier comportant le garde-temps. Des languettes de contact assurent la liaison entre les deux éléments. Il n'y a dans cet agencement aucun système d'encliquetage et les deux éléments ne peuvent être séparés l'un de l'autre qu'après démontage du second boîtier.Document US-A-3 977 176 describes a watch whose battery is housed in a case separate from a second case comprising the timepiece. Contact tabs provide the connection between the two elements. There is no latching system in this arrangement and the two elements cannot be separated from each other until the second housing has been removed.

L'invention sera mieux comprise à la lecture de la description qui va suivre de plusieurs modes de réalisation, cette description étant donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés sur lesquels:

  • - la figure 1 est une vue en perspective d'un dispositif de jonction électrique suivant l'invention conformément au mode de réalisation préféré;
  • - la figure 2 est une vue en coupe axiale d'un dispositif de jonction suivant l'invention correspondant à celui de la figure 1;
  • - la figure 2A montre une vue en coupe agrandie du dispositif de jonction;
  • - la figure 3 est une vue en plan de l'une des languettes du bracelet, montrant notamment les pistes conductrices destinées à être reliées aux dispositifs de jonction représentés sur les figures 1 et 2;
  • - les figures 4 et 5 montrent, par des vues en coupe axiale, deux autres modes de réalisation de l'invention;
  • - la figure 6 est une vue partielle en perspective d'une variante du dispositif de jonction suivant l'invention.
The invention will be better understood on reading the description which follows of several embodiments, this description being given solely by way of example and made with reference to the appended drawings in which:
  • - Figure 1 is a perspective view of an electrical junction device according to the invention in accordance with the preferred embodiment;
  • - Figure 2 is an axial sectional view of a joining device according to the invention corresponding to that of Figure 1;
  • - Figure 2A shows an enlarged sectional view of the joining device;
  • - Figure 3 is a plan view of one of the tabs of the bracelet, showing in particular the conductive tracks intended to be connected to the junction devices shown in Figures 1 and 2;
  • - Figures 4 and 5 show, in axial sectional views, two other embodiments of the invention;
  • - Figure 6 is a partial perspective view of a variant of the joining device according to the invention.

Sans quecela soit limitatif en aucune manière de l'invention décrite, l'exemple qui va être décrit en faisant référence aux figures 1, 2 et 2A concerne un boîtier B associé à un bracelet BR entre lesquels doivent être établis plusieurs trajets électriques assurés, au niveau de la séparation entre ces deux éléments, par des dispositifs de jonction suivant l'invention, ces dispositifs étant désignés dans leur ensemble par la référence 1. Le boîtier B renferme le circuit électrique ou électromécanique d'une pièce d'horlogerie, mais il convient de souligner que l'invention s'applique dans tous les cas où un dispositif électronique est associé à un bracelet qui comporte un ou plusieurs composants devant être associés au circuit qui est situé dans le boîtier B.Without this being in any way limiting of the invention described, the example which will be described in referring to FIGS. 1, 2 and 2A relates to a box B associated with a bracelet BR between which several electrical paths must be established, at the level of the separation between these two elements, by junction devices according to the invention, these devices being designated as a whole by the reference 1. The box B contains the electrical or electromechanical circuit of a timepiece, but it should be emphasized that the invention applies in all cases where an electronic device is associated with a bracelet which includes one or more components to be associated with the circuit which is located in the case B.

Sur la figure 2 on voit que ce boîtier contient un circuit électrique imprimé CI muni d'un circuit intégré (non représenté) et un dispositif d'affichage DA, le boîtier étant fermé par une glace G.In FIG. 2, it can be seen that this box contains a printed electrical circuit CI provided with an integrated circuit (not shown) and a display device DA, the box being closed by a glass G.

Le dispositif de jonction comporte des jeux de contacts 2 composés d'un élément conducteur rigide 3 et d'un élément conducteur élastique 4. Le premier de ces contacts est ici un pion conducteur de forme générale cylindrique d'axe X-X.The junction device comprises sets of contacts 2 composed of a rigid conductive element 3 and of an elastic conductive element 4. The first of these contacts is here a conductive pin of generally cylindrical shape with an axis X-X.

Ce pion présente une surface extérieure composée de plusieurs portions qui sont, vues de haut en bas sur la figure 2A, une portée 5 séparée d'une portée 6 par un épaulement radial 7, une portion tronconique 8 suivie d'une portion cylindrique 9, une portée 10 séparée de la portion cylindrique 9 par un épaulement 11, une portion 12 en forme de "diabolo" présentant notamment deux surfaces inclinées 12a et 12b entre lesquelles est prévue une surface cylindrique 12c, une portion cylindrique 13 et enfin une pointe 14 de forme générale conique.This pin has an outer surface composed of several portions which are, seen from top to bottom in FIG. 2A, a bearing 5 separated from a bearing 6 by a radial shoulder 7, a frustoconical portion 8 followed by a cylindrical portion 9, a bearing surface 10 separated from the cylindrical portion 9 by a shoulder 11, a portion 12 in the form of a "diabolo" having in particular two inclined surfaces 12a and 12b between which is provided a cylindrical surface 12c, a cylindrical portion 13 and finally a point 14 of general conical shape.

Cette forme relativement tourmentée de la surface extérieure du pion est destinée, dans la zone où ce pion est fixé dans le boîtier B, à assurer une étanchéité irréprochable, afin d'isoler de l'extérieur la cavité intérieure de celui-ci. Bien entendu, le boîtier comporte un trou 15 avec des portions de surface complémentaires à celles de la partie correspondante du pion, mais qu'il est inutile de décrire en détail ici. Il suffit de noter que la forme définitive du trou 15 du boîtier à travers lequel s'étend le pion 3 est obtenue au cours de la mise en place de celui-ci qui, de préférence, est effectuée par l'application d'ultrasons. Eventuelle- ment, on peut parfaire cette étanchéité en versant autour du sommet du pion 3 une faible quantité d'une matière polymérisable, après la mise en place du pion, cette matière étant aspirée par capillarité autour de la portée 5 afin de fermer tous interstices subsistant éventuellement autour du corps du pion inséré dans le boîtier B.This relatively tormented shape of the outer surface of the pin is intended, in the area where this pin is fixed in the housing B, to ensure an impeccable seal, in order to isolate the exterior of the interior cavity thereof. Of course, the housing has a hole 15 with surface portions complementary to those of the corresponding part of the pin, but which it is unnecessary to describe in detail here. It suffices to note that the final shape of the hole 15 of the housing through which the pin 3 extends is obtained during the positioning thereof which, preferably, is carried out by the application of ultrasound. Optionally, this seal can be perfected by pouring a small amount of a polymerizable material around the top of the pin 3, after the pin has been put in place, this material being sucked by capillary action around the surface 5 in order to close all interstices. possibly remaining around the body of the pin inserted in the housing B.

Les portions 12a, 12b et 12c sont destinées à assurer la solidarisation par encliquetage élastique du dispositif de jonction. A cet effet, l'extrémité du bracelet BR est conformée de manière à définir une cavité 16, dans laquelle peut pénétrer la partie inférieure du pion 3.The portions 12a, 12b and 12c are intended to ensure the joining by elastic snap-fastening of the joining device. To this end, the end of the bracelet BR is shaped so as to define a cavity 16, into which the lower part of the pin 3 can penetrate.

Avant d'examiner plus en détail cette partie du dispositif de jonction, il est utile de se référer tout d'abord aux figures 1 et 3 qui montrent la construction du bracelet.Before examining this part of the joining device in more detail, it is useful to refer first to Figures 1 and 3 which show the construction of the bracelet.

Dans l'exemple décrit ici, la partie du dispositif de jonction logée dans le bracelet comporte quatre touches de fonction désignées globalement par les références Ta à Td pouvant déclencher dans le circuit CI les fonctions "Montre", "Alarme", "Chronographe" et "Minuterie".In the example described here, the part of the junction device housed in the bracelet comprises four function keys generally designated by the references Ta to Td which can trigger in the circuit CI the functions "Watch", "Alarm", "Chronograph" and "Timer".

Le demi-bracelet représenté comporte deux lamelles 17a et 17b en une matière plastique souple, la lamelle 17b s'encastrant dans un évidement 18 prévu dans la partie d'extrémité de la lamelle 17a proche du boîtier B. Cet évidement a une épaisseur qui est à peu prés égale à la moitié de l'épaisseur totale de la lamelle 17a. Celle-ci est rendue solidaire de la lamelle 17b, par collage par exemple, un adhésif étant prévu à cet effet (en 19) sur toute la périphérie de la lamelle 17b.The half-bracelet shown has two strips 17a and 17b made of a flexible plastic material, the strip 17b fitting into a recess 18 provided in the end part of the strip 17a close to the housing B. This recess has a thickness which is roughly equal to half the total thickness of the strip 17a. This is made integral with the strip 17b, by gluing for example, an adhesive being provided for this purpose (in 19) over the entire periphery of the strip 17b.

Cette lamelle 17b est également pourvue d'un ensemble de conducteurs 20 qui peut y être apposé par sérigraphie par exemple. Cet ensemble de conducteurs est prévu sur la face de la lamelle 17b tournée vers la lamelle 17a.This strip 17b is also provided with a set of conductors 20 which can be affixed thereto by screen printing for example. This set of conductors is provided on the face of the strip 17b facing the strip 17a.

La figure 3 montre que l'ensemble de conducteurs définit quatre contacts fixes réalisés chacun sous la forme de deux peignes 21 a à 21 d associés respectivement à des contacts mobiles formés par des métallisations 22 (seule la métallisation de la touche Td apparaissant clairement sur la figure 1). Chaque ensemble d'un contact fixe et d'un contact mobile forme un interrupteur qui est fermé lorsque, par une pression du doigt, la zone correspondant à une touche donnée est déformée et la métallisation 22 appuyée sur les peignes imbriqués correspondants. Pour augmenter la souplesse de la lamelle 17a dans les zones où sont prévues les touches Ta à Td, il est prévu à l'endroit de chacune de ces touches une cavité 23 s'ouvrant vers la lamelle 17b et sur le fond de laquelle est prévue la métallisation 22.FIG. 3 shows that the set of conductors defines four fixed contacts each produced in the form of two combs 21 a to 21 d respectively associated with mobile contacts formed by metallizations 22 (only the metallization of the Td key appearing clearly on the figure 1). Each set of a fixed contact and a movable contact forms a switch which is closed when, by finger pressure, the zone corresponding to a given key is deformed and the metallization 22 pressed on the corresponding nested combs. To increase the flexibility of the strip 17a in the areas where the keys Ta to Td are provided, there is provided at the location of each of these keys a cavity 23 opening towards the strip 17b and on the bottom of which is provided metallization 22.

Sur la figure 3 on voit également clairement que les paires de peignes 21a à 21d sont reliées à des conducteurs 24a à 24e, étant entendu que le conducteur 24a est commun à toutes les paires de peignes 21a a 21d. Chacun des conducteurs 24a à 24e se prolonge vers l'extrémité de la lamelle 17b pour se terminer en une borne 25.In FIG. 3, it is also clearly seen that the pairs of combs 21a to 21d are connected to conductors 24a to 24e, it being understood that the conductor 24a is common to all the pairs of combs 21a to 21d. Each of the conductors 24a to 24e extends towards the end of the strip 17b to end in a terminal 25.

On comprend donc que lorsqu'une zone de la lamelle 17a correspondant à l'une des touches Ta à Td est enfoncée, la métallisation 22 relie l'une à l'autre les deux peignes correspondant à cette touche, ce qui établit un court-circuit entre le conducteur 24a d'une part et l'un des conducteurs 24b à 24e d'autre part, les deux bornes 25 correspondantes étant alors reliées l'une à l'autre.It is therefore understood that when an area of the strip 17a corresponding to one of the keys Ta to Td is pressed, the metallization 22 connects to one another the two combs corresponding to this key, which establishes a short circuit between the conductor 24a on the one hand and one of the conductors 24b to 24e on the other hand, the two corresponding terminals 25 are then connected to each other.

La lamelle 17a comporte par ailleurs une zone épaissie 26, de forme bombée, dans laquelle est prévue une ouverture transversale 27 destinée à recevoir un axe 28 au moyen duquel le bracelet est articulé au boîtier B, ce dernier comportant à cet effet une forme adaptée au bossage 26 (voir en particulier la figure 2). Il est à noter que l'articulation entre le boîtier B et le bracelet BR n'est que partiellement représentée, sa forme étant par ailleurs classique.The strip 17a also comprises a thickened zone 26, of convex shape, in which is provided a transverse opening 27 intended to receive a pin 28 by means of which the bracelet is articulated to the case B, the latter comprising for this purpose a shape adapted to the boss 26 (see in particular Figure 2). It should be noted that the articulation between the case B and the bracelet BR is only partially shown, its shape being moreover conventional.

Dans la zone de la lamelle 17a située au-delà du bossage 26, c'est-à-dire à l'extrémité de cette lamelle, sont prévus les éléments qui assurent l'encliquetage du dispositif de jonction et pour examiner ces éléments on se référera de nouveau à la figure 2.In the area of the strip 17a located beyond the boss 26, that is to say at the end of this lamella, there are provided the elements which ensure the snap-fastening of the junction device and to examine these elements we will again refer to FIG. 2.

Comme dans le mode de réalisation représenté, il est prévu cinq bornes 25 devant être connectées au circuit CI dans le boîtier B, il est évident qu'il convient de prévoir cinq jeux de contact.As in the embodiment shown, there are five terminals 25 to be connected to the circuit CI in the housing B, it is obvious that five contact sets should be provided.

Chacun de ces dispositifs comporte donc, centrée sur l'axe X-X une nervure annulaire 29 présentant une surface extérieure tronconique 30, à laquelle correspond une surface complémentaire tronconique 31 prévue dans le boîtier B et qui constitue donc une portion de la paroi du trou 15 de celui-ci. On verra par la suite que ces deux surfaces ont une grande importance pour la réalisation de la protection des contacts de chacun des dispositifs de jonction.Each of these devices therefore comprises, centered on the axis XX an annular rib 29 having a frustoconical outer surface 30, to which corresponds a frustoconical complementary surface 31 provided in the housing B and which therefore constitutes a portion of the wall of the hole 15 of this one. We will see later that these two surfaces are of great importance for achieving the protection of the contacts of each of the junction devices.

La nervure annulaire 29 délimite ainsi la cavité 16 décrite ci-dessus dont l'embouchure est formée par une collerette 32. La section radiale de celle-ci présente une forme en V dont la pointe est dirigée vers l'axe X-X. De préférence, une des branches de ce V, c'est-à-dire celle qui se trouve le plus proche de l'extrémité libre du pion 3, est inclinée par rapport au plan radial passant par la pointe du V de 30°, l'autre branche l'étant de 60°. A ces dimensions correspondent d'ailleurs les inclinaisons des surfaces 12a et 12b du pion 3.The annular rib 29 thus delimits the cavity 16 described above, the mouth of which is formed by a flange 32. The radial section of the latter has a V shape, the point of which is directed towards the axis X-X. Preferably, one of the branches of this V, that is to say that which is closest to the free end of the pin 3, is inclined relative to the radial plane passing through the tip of the V by 30 °, the other branch being 60 °. These dimensions also correspond to the inclinations of the surfaces 12a and 12b of the pin 3.

Dès lors on comprend que, compte tenu du fait que la portion 13 du pion 3 présente un diamètre nettement supérieur au diamètre le plus faible de la collerette 32, l'insertion du pion 3 dans la cavité 16 produit d'abord une déformation de la nervure 32 au passage de la portion 13, puis un encliquetage élastique lorsque cette collerette 32 pénètre dans la rainure délimitée par les portions 12a à 12c du pion 3. Or, les dimensions des pièces ont été choisies de telle sorte que les surfaces 30 et 31 soient appliquées étroitement l'une sur l'autre, la nervure 29 étant tirée axialement vers le haut (force F indiquée sur la figure 2). A cela s'ajoute que les surfaces tronconiques 30 et 31 se rétrécissent dans un sens qui correspond à celui selon lequel agit la force d'encliquetage. Par ailleurs, comme les jeux de contact sont prévus dans une zone du bracelet qui est située à une extrémité qui s'étend au delà de l'articulation du bracelet par rapport à son brin principal, ladite force est en quelque sorte augmentée par une force qui résulte du couple créé autour de l'axe 27 par la courbure naturelle du bracelet lorsque le dispositif électronique est porté au poignet. Il en résulte donc que la cavité 16 dans laquelle s'établit le contact électrique est parfaitement isolée de l'extérieur.Therefore it is understood that, given the fact that the portion 13 of the pin 3 has a diameter significantly greater than the smallest diameter of the flange 32, the insertion of the pin 3 in the cavity 16 first produces a deformation of the rib 32 at the passage of the portion 13, then an elastic snap-fastening when this flange 32 enters the groove delimited by the portions 12a to 12c of the pin 3. However, the dimensions of the parts have been chosen such that the surfaces 30 and 31 are applied closely to each other, the rib 29 being pulled axially upwards (force F indicated in FIG. 2). To this is added that the frustoconical surfaces 30 and 31 shrink in a direction which corresponds to that in which the latching force acts. Furthermore, since the contact clearances are provided in a zone of the bracelet which is situated at one end which extends beyond the articulation of the bracelet with respect to its main strand, said force is in a way increased by a force. which results from the couple created around the axis 27 by the natural curvature of the bracelet when the electronic device is worn on the wrist. It therefore follows that the cavity 16 in which the electrical contact is established is perfectly isolated from the outside.

Les figures 1 et 2 montrent clairement que les bornes 25 sont en contact d'un bloc de connexion 33 qui constitue un connecteur élastomère composé de zones alternativement conductrices et isolantes et réalisées en une matière souple telle qu'une silicone, les zones conductrices étant chargées par des particules de carbone. On comprend donc que ces zones conductrices peuvent établir une liaison électrique entre les bornes 25 et les extrémités des pions 3, celles-ci déformant légèrement le bloc de contact 33 là où elles s'appliquent sur ce dernier. Il à noter que l'élasticité du bloc 33 contribue à une bonne pression de contact gràce à la déformation que ce bloc subit lors de l'assemblage des dispositifs de jonction.Figures 1 and 2 clearly show that the terminals 25 are in contact with a connection block 33 which constitutes an elastomeric connector composed of alternately conductive and insulating zones and made of a flexible material such as silicone, the conductive zones being charged by carbon particles. It is therefore understood that these conductive zones can establish an electrical connection between the terminals 25 and the ends of the pins 3, the latter slightly deforming the contact block 33 where they are applied to the latter. It should be noted that the elasticity of the block 33 contributes to a good contact pressure thanks to the deformation that this block undergoes during the assembly of the junction devices.

Il est à noter que les surfaces de butée 30 et 31 ont une forme tronconique coaxiale à l'axe X-X, leur conicité étant tournée de telle manière qu'elles soient appliquées l'une sur l'autre avec une force d'autant plus grande que la force de maintien du pion dans la cavité 16 est plus grande.It should be noted that the abutment surfaces 30 and 31 have a frustoconical shape coaxial with the axis XX, their conicity being rotated so that they are applied to one another with an even greater force that the holding force of the pin in the cavity 16 is greater.

On va maintenant décrire plusieurs autres modes de réalisation possibles de l'invention en se référant plus particulièrement aux figures 4 à 8. Dans ces figures, les éléments identiques ou équivalents du dispositif de jonction par rapport au précédent mode de réalisation ont reçu les mêmes références.We will now describe several other possible embodiments of the invention with particular reference to Figures 4 to 8. In these figures, the identical or equivalent elements of the joining device with respect to the previous embodiment have been given the same references .

Sur la figure 4, le dispositif de jonction comporte des pions conducteurs 34 dont l'extrémité, au lieu de présenter un profil en creux, a un diamètre plus important que le reste du pion, afin d'assurer l'encliquetage dans une rainure annulaire intérieure 35 que présente la nervure 29. On conçoit que cette disposition a les mêmes effets que ceux résultant du dispositif de jonction précédemment décrit, les surfaces 30 et 31 étant appliquées l'une sur l'autre de la même façon.In FIG. 4, the joining device comprises conductive pins 34 whose end, instead of having a hollow profile, has a larger diameter than the rest of the pin, in order to ensure the snap-fastening in an annular groove inner 35 that has the rib 29. It is understood that this arrangement has the same effects as those resulting from the junction device described above, the surfaces 30 and 31 being applied to each other in the same way.

Dans le cas de la figure 5, il s'agit d'une disposition inversée en ce sens qu'il est prévu un pion 36 en un matériau conducteur qui est ancré par une bride 37 dans une cavité 38 ménagée dans la nervure 29 de la lamelle 17a. Ce pion est immobilisé par ailleurs par la lamelle 17b qui, comme précédemment décrit, est collé sur la lamelle 17a. La partie supérieure du pion 36 présente un bossage 39 de section circulaire et d'une forme à peu près identique à celle de l'extrémité du pion 34 dans la figure 4, ce bossage étant inséré dans une ouverture 40 prévue dans le boîtier, l'encliquetage élastique étant obtenu par le fait que le bossage 39 présente un diamètre supérieur à celui de l'ouverture 40. Dans ce cas également, les surfaces 30 et 31 ménagées respectivement sur la nervure 29 du bracelet BR et sur le boîtier B sont appliquées l'une sur l'autre par la force engendrée par l'encliquetage élastique. Dans le cas de la figure 5, le bossage 39 est appliqué contre un bloc de contact 41 qui est logé dans le boîtier au lieu de l'être dans le bracelet.In the case of FIG. 5, it is an inverted arrangement in the sense that a pin 36 is provided in a conductive material which is anchored by a flange 37 in a cavity 38 formed in the rib 29 of the coverslip 17a. This pin is also immobilized by the strip 17b which, as previously described, is glued to the strip 17a. The upper part of the pin 36 has a boss 39 of circular section and of a shape roughly identical to that of the end of the pin 34 in FIG. 4, this boss being inserted in an opening 40 provided in the housing, l elastic snap being obtained by the fact that the boss 39 has a diameter greater than that of the opening 40. In this case also, the surfaces 30 and 31 formed respectively on the rib 29 of the bracelet BR and on the case B are applied one on the other by the force generated by the elastic snap. In the case of FIG. 5, the boss 39 is applied against a contact block 41 which is housed in the case instead of being in the bracelet.

La variante représentée à la figure 6 diffère du précédent mode de réalisation par le fait que les surfaces d'étanchéité 30 et 31 ne sont pas prévues individuellement pour chaque dispositif de jonction, mais au contraire sont communes à tous ceux-ci. A cet effet, il est prévu une nervure 50 qui fait le tour d'une rangée de trous 51 alignés le long du bord d'extrémité de la languette 17a du bracelet BR, un agencement complémentaire étant prévu sur la boîte B. L'encliquetage élastique, au contraire, est obtenu individuellement pour chaque pion.The variant shown in Figure 6 differs from the previous embodiment in that the sealing surfaces 30 and 31 are not provided individually for each junction device, but on the contrary are common to all of them. To this end, a rib 50 is provided which goes around a row of holes 51 aligned along the end edge of the tongue 17a of the bracelet BR, a complementary arrangement being provided on the case B. elastic, on the contrary, is obtained individually for each pawn.

On comprend que le mode de réalisation de la Fig. 6 peut être de conception inverse c'est-à-dire avec le pion sur le bracelet et la nervure sur le boîtier.It is understood that the embodiment of the Fig. 6 can be of reverse design, that is to say with the pin on the bracelet and the rib on the case.

Enfin en ce qui concerne le bracelet et comme cela est visible sur la Fig. 1, la lamelle 17b présente des zones de renforcement 55 séparées par des rainures transversales 56 et destinées à renforcer le bracelet en face des touches Ta à Td, ceci afin d'éviter le risque de contact intempestif dù à la courbure du bracelet.Finally as regards the bracelet and as can be seen in FIG. 1, the strip 17b has reinforcement zones 55 separated by transverse grooves 56 and intended to reinforce the bracelet opposite the keys Ta to Td, this in order to avoid the risk of untimely contact due to the curvature of the bracelet.

Claims (6)

1. An electrical connection arrangement between the parts (Cl; Ta to Td) of a circuit located respectively in the case (B) and the bracelet (BR) of an electronic appliance intended to be worn on the wrist, in which, in each electrical path between said parts there is inserted a set of mating contacts (3, 4) which are separable but kept applied to one another, each set of contacts (3, 4) at least partially exhibiting a rotational symmetry defining an axis (X-X), characterized in that the contacts (3, 4) are applied to one another by a latching force (F) directed along said axis (X-X) and in that they are surrounded by two complementary abutment surfaces (30, 31) one of which is provided on the bracelet (BR) and the other on the case (B) and applied to one another by virtue of the presence of said latching force (F) in order to protect the contacts from damaging influences from the exterior, and in that one of the contacts from the set of contacts is a conductive foot (3, 34; 36) anchored in the case (B) or the bracelet (BR) and penetrating into an opening in the bracelet (BR) or respectively in the case (B), the latter or the latter and said conductive foot (3, 34; 36) exhibiting complementary annular surfaces to assure the latching.
2. An arrangement according to claim 1 characterized in that said complementary abutment surfaces (30, 31) are tapered and are narrowed in a sense which corresponds to that along which the latching force (F) acts.
3. An arrangement according to either of claims 1 and 2 characterized in that the set or sets of electrical contacts (3, 4) are provided in a part of the bracelet (B) which, relative to the main strand thereof, is located beyond the pivot axis (27) around which such strand is articulated on the case (B) and in that said axis of symmetry (X-X) is perpendicular to this pivot axis.
4. An arrangement according to any of the preceding claims characterized in that one of the contacts of said set of contacts (3, 4) is a conductive foot (3; 34) mounted in a sealed manner in said case (B) whilst projecting beyond the outer surface of the latter and in that such foot coacts with an annular rib (29) arranged on the bracelet into which it penetrates to be latched thanks to the complementary annular surfaces (12a to 12c, 32) provided on the foot and the rib.
5. An arrangement according to claim 4 characterized in that the other contact of the set of contacts (3, 4) is an elastic block of conductive plastic material which is partially deformed by said foot (3) when the connection arrangement is assembled and which is electrically coupled to the part of the circuit located in the bracelet (Ta to Td, 20).
6. An arrangement according to any of the preceding claims characterized in that several contact sets being arranged in a row, said abutment surfaces (30, 31) are common to all of such contact sets (Fig. 8).
EP85115438A 1984-12-10 1985-12-05 Wrist-mounted electronic device Expired - Lifetime EP0186804B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH584784A CH657743GA3 (en) 1984-12-10 1984-12-10
CH5847/84 1984-12-10

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US (1) US4690567A (en)
EP (1) EP0186804B1 (en)
JP (1) JPS61160080A (en)
CH (1) CH657743GA3 (en)
DE (1) DE3576583D1 (en)
HK (1) HK71193A (en)
SG (1) SG24093G (en)

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SG24093G (en) 1993-08-06
JPS61160080A (en) 1986-07-19
EP0186804A1 (en) 1986-07-09
CH657743GA3 (en) 1986-09-30
US4690567A (en) 1987-09-01
HK71193A (en) 1993-07-30
JPH0411832B2 (en) 1992-03-02
DE3576583D1 (en) 1990-04-19

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