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EP1416582B1 - Portable electronic device with an electric connection inside the device case - Google Patents

Portable electronic device with an electric connection inside the device case Download PDF

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Publication number
EP1416582B1
EP1416582B1 EP02079509A EP02079509A EP1416582B1 EP 1416582 B1 EP1416582 B1 EP 1416582B1 EP 02079509 A EP02079509 A EP 02079509A EP 02079509 A EP02079509 A EP 02079509A EP 1416582 B1 EP1416582 B1 EP 1416582B1
Authority
EP
European Patent Office
Prior art keywords
case
electrical
contact
electric
module
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
EP02079509A
Other languages
German (de)
French (fr)
Other versions
EP1416582A1 (en
Inventor
Pierre-André Noirjean
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 Manufacture Horlogere Suisse
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP02079509A priority Critical patent/EP1416582B1/en
Priority to DE60227260T priority patent/DE60227260D1/en
Priority to AT02079509T priority patent/ATE399375T1/en
Priority to US10/693,893 priority patent/US6854978B2/en
Publication of EP1416582A1 publication Critical patent/EP1416582A1/en
Application granted granted Critical
Publication of EP1416582B1 publication Critical patent/EP1416582B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/273—Adaptation for carrying or wearing by persons or animals
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
    • A44C5/14—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps characterised by the way of fastening to a wrist-watch or the like
    • 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
    • G04R—RADIO-CONTROLLED TIME-PIECES
    • G04R60/00—Constructional details
    • G04R60/04—Antennas attached to or integrated in watch bracelets

Definitions

  • the present invention relates to a portable device comprising a housing in which is disposed a first electrical module, and a bracelet attached to the housing, the housing comprising an upper part and a lower part which cooperate with each other to realize the assembly of the housing, a second electrical module being associated with the bracelet as well as electrical connection means providing an electrical connection between the first and second electrical modules through an opening in the housing, the first electrical module comprising at least one contact pad electrical capable of being connected to the electrical connection means.
  • the present invention relates to such a portable device comprising means for establishing a contact of the electrical connection means with the first electrical module, inside the housing, removably.
  • electrical connection means any conductor or set of conductors to provide an electrical connection between two electrical modules.
  • electrical module means any device for providing or receiving a power supply and, where appropriate, to transmit or receive an electrical signal.
  • the portable electronic device is made in the form of a portable electronic instrument in the form of a wristwatch having means for receiving, and possibly transmitting, radiofrequency type signals.
  • the first electrical module comprises electronic circuits for processing electrical signals exchanged with the second electrical module, the latter comprising an antenna.
  • the European Patent No. 0 631 341 describes an electronic instrument of the wristwatch type comprising an antenna housed in the bracelet and connected to electronic circuits for processing the signals received by the antenna.
  • the electronic processing circuits are disposed inside the instrument housing on a printed circuit board. Connection pads are provided on a peripheral region of the printed circuit to enable the establishment of an electrical connection between the Antenna connection terminals and electronic processing circuits.
  • the solution described in this document to provide the electrical connection between the terminals of the antenna and the connection pads of the printed circuit consists of using fixing screws passing through adapted openings formed in the terminals of the antenna, and screwed into the printed circuit at the connection pads.
  • Such an embodiment makes mounting the bracelet and the antenna easier than in the previously described solution insofar as it is sufficient to plug the electrical conductor into an opening of the housing to establish the electrical contact.
  • this solution also has drawbacks, in particular from the point of view of the durability. Indeed, the leaf spring is typically welded to the printed circuit, which must be done carefully to ensure sufficient mechanical strength compared to the perpendicular stresses that are exerted on the blade, once the electrical conductor is placed in support against her. It may further be noted that the contact surfaces between the blade and the electrical conductor are not protected, which can lead to problems of stability of the electrical connection, in particular due to possible oxidation of the free metal surfaces. In addition, this solution has a relatively large footprint and therefore can not be suitable for the realization of a small volume instrument.
  • a disadvantage of such a solution proposed in the US Patent 4,947,179 is that it does not guarantee a good mechanical strength in time at the electrical connection between the antenna and the contact pad of the electrical module, and is not well isolated from environmental conditions.
  • the object of the present invention is to improve the electronic devices of this kind so as to avoid the aforementioned drawbacks.
  • the invention provides a portable device of the type indicated above, characterized in that the mounting of the housing ensures the establishment of an electrical contact, by compression, between said connection means and said contact pad.
  • fixing means for holding together the lower and upper parts of the housing, such as screws for example, the implementation of these fixing means to ensure the maintenance of the electrical contact between the connection means and the contact pad.
  • the second electrical module housed in the bracelet of the portable device can be disconnected from the first electrical module by simply disengaging the two parts of the housing. Indeed, the fact of spreading the two parts of the housing from one another can relieve the pressure respectively exerted on the connecting means of the second electrical module and the contact pad of the first electrical module.
  • the portable electronic device is a wristwatch type instrument having communication means using radio frequency waves. It is therefore expected to house an antenna in the bracelet, connected to electronic processing circuit signals received by the antenna, these circuits being arranged in the instrument housing.
  • electrical conductors are also provided to connect the two terminals of the antenna to the electronic processing circuits, the conductors being arranged through an opening in the instrument housing. During the installation of the antenna, regions of the electrical conductors are brought opposite contact pads arranged on a printed circuit carrying the electronic processing circuits.
  • Means are then provided for compressing these regions of the electrical conductors against the contact pads during assembly of the lower and upper housing parts.
  • connection means are provided for compressing the connection means against the contact pads.
  • the embodiments described relate to a particular portable electronic device by way of non-limiting example, namely a wristwatch type instrument having at least radio frequency wave reception functionalities.
  • the figure 1 represents a preferred embodiment of the strand 1 of the bracelet according to the present invention carrying the buckle 2 with its pin 3.
  • the bracelet is obtained by molding plastic materials and has an external appearance of conventional type.
  • the strand 1 shown has three main constituent elements.
  • the strand 1 is obtained by an assembly of two "half-strands" in its thickness, a first internal half-strand 4 and a second external half-strand 5.
  • the third constituent element of the strand is a reinforcing element 6, disposed at level of the end of strand 1 intended to be linked to the watch case.
  • the reinforcing element 6 is made of a plastic material having greater rigidity than that of the materials chosen for the manufacture of the half-strands 4 and 5, so as to guarantee the strength of the connection between the housing and the strand 1.
  • Holes 7 are provided in the reinforcing element 6 and in the inner half-strand 4 to receive fixing screws (not shown) of the strand 1 to the watch case.
  • a lug 8 whose function will be explained later, is provided at the end of the strand 1 intended to be linked to the watch case.
  • the lug 8 is made in one piece with the internal half-strand 4, by a conventional type of molding, and comprises a central hole 9.
  • connection means 11 The free end 10 of electrical connection means 11 is apparent, the connection means leaving the strand 1 through the central hole 9 of the lug 8.
  • connection means 11 are provided to connect in particular the terminals of an antenna (visible on the figure 2 ) disposed between the two half-strands 4 and 5 of the bracelet during their assembly.
  • the connection means 11 comprise in particular conductive tracks (not shown) whose ends are shaped as contact pads 12, the tracks being carried by a flexible substrate 13.
  • the figure 2 is a partial sectional view of the bracelet strand 1 assembled on the housing 20 of the instrument according to a first embodiment of the invention.
  • the representation has been deliberately simplified in order to make more visible the particular characters of the present invention.
  • the strand 1 comprises, between its two half-strands 4 and 5, a substrate 13 carrying an antenna 22.
  • the type of antenna used is conductive track deposited on a flexible substrate in the form of a spiral.
  • the housing 20 of the instrument mainly comprises an upper portion 23, or middle part, and a lower part 24, or bottom, the middle and the bottom being separated by a seal 25 sealing the housing 20.
  • the housing is furthermore closed on the top by an ice 26, of conventional type and made for example of plastic or sapphire depending on the desired level of range.
  • the middle 23 has an opening 27 on its side in which is inserted the lug 8 of the strand 1 bracelet. Therefore, the transverse dimensions of the lug 8 are preferably chosen slightly greater than those of the opening 27. Thus, the lug 8 is frictionally housed in the opening 27 and itself ensures the sealing of the housing at the opening level.
  • This construction detail advantageously makes it possible to dispense with the use of an additional seal at this point to effect the introduction of the connection means 11 of the antenna 22 inside the housing 20. It is also possible to provide bead material (not shown) molded with the lug 8 to ensure sealing at the opening 27.
  • the reinforcing element 6 has a thin portion 28 extending inside the central hole 9 of the lug 8, resting against the connection means 11 of the antenna, thus making it possible to guarantee a certain rigidity with the pin 8 whose possible deformations could be detrimental from the point of view of the tightness of the instrument. It may also be noted that the possible deformations of the lug 8 are likely to damage the antenna 22, which is avoided here.
  • the peripheral portion 29 of the bottom 24 has a shape complementary to that of the end of the inner half-strand 4 intended to be fixed to the housing 20 of the instrument.
  • the middle part 23 has a shape substantially complementary to that of the part of the strand 1 intended to be arranged facing the middle part 23.
  • the strand 1 is wedged between the middle part 23 and the bottom 24.
  • screws are provided for fixing the strand 1 to the housing 20. It may be noted that, according to a preferred alternative, these screws also pass through holes (not shown) formed in the bottom 24, at its peripheral portion 29, to allow mounting the housing 20.
  • the housing 20 contains electronic circuits 30, in particular for controlling display means, schematized on the figure 2 by a liquid crystal screen 31, or LCD screen.
  • the electronic circuits 30 may further comprise means for providing various additional functions, such as a watch movement of conventional type for example, to allow a display of the current time.
  • a power source is provided (shown with reference 48 on the figure 5 ) to supply the various components of the instrument according to the invention.
  • the electronic circuits 30 are furthermore electrically connected to a first electrical module 32 comprising, in the illustrated example, electronic circuits for processing the signals received by the antenna 22.
  • the first electrical module comprises contact pads 33 intended to be brought into contact with the contact pads 12 of the antenna 22.
  • the middle part 23 comprises a flange 34 having a shoulder 35 against which the LCD screen 31 is disposed in abutment.
  • the electrical module 32 is disposed in abutment against the LCD screen 31, either directly or via additional elements (not shown), possibly of the spacer type.
  • peripheral regions of certain components arranged in the middle part 23 abut against regions of the latter, as is the case for the electrical module 32 on the figure 2 .
  • feet can be provided, of which only one 36 is shown schematically on the figure 2 , in particular to position the electronic circuits 30.
  • the electronic circuits 30 are carried by a printed circuit board (not shown) having through holes in different locations, provided to cooperate with the positioning feet, such a structure being known.
  • the foot 36 has a second function in addition to its conventional function of positioning the electronic circuits. Indeed, it is apparent from the figure 2 when the housing 20 of the portable device is mounted, the end 10 of the connection means 11 is compressed by the foot 36 against the contact pads 33 of the first electrical module 32.
  • the simple assembly of the upper parts leads to the establishment of an electrical connection between a first and a second modules electrical means, that is to say here 32 electronic signal processing circuits and an antenna 22.
  • a first and a second modules electrical means that is to say here 32 electronic signal processing circuits and an antenna 22.
  • Specific means for establishing this electrical connection such as a weld or a screw are not necessary contrary to what is known from the prior art.
  • the step of setting up such a means for establishing the electrical connection, when mounting the housing is advantageously eliminated.
  • An additional advantage of the structure according to the present invention stems from the fact that the first electrical module 32 and the lug 8 of the bracelet, and therefore the end 10 of the connection means 11, are positioned with respect to a single reference namely Therefore, a good reliability in the arrangement of these components can be obtained during assembly, insofar as it does not depend on tolerances on the dimensions or the positioning of other components of the housing 20.
  • the foot 36 it is preferably made at the same time as the bottom by molding plastic material, or even metal.
  • it can be provided in the form of a tube on which is inserted by force an additional element whose face intended to come into contact with the end 10 of the connection means 11 is substantially flat and covers a surface at less than that of the contact pads 33.
  • this additional element is elastic so that the aforementioned face can be deformed to ensure a good quality of contact between the connection means 11 and the contact pads 33.
  • the figure 3 represents in perspective a portion of the portable device according to a second preferred embodiment of the present invention.
  • This figure shows the strand 1 of the bracelet previously described in relation to the figure 1 .
  • the strand 1 is ready to be put in place on the middle part 23.
  • the middle part 23 comprises a plurality of guide surfaces 37 intended to cooperate with surfaces of the end of the strand 1 intended to be fixed to the housing 20. It can be seen in particular that the middle part 23 comprises a surface 38 of complementary section to about half that of the lug 8 and thus providing a radial guide function for the strand 1.
  • the figure 3 also leaves, facing the guide surface 38, the opening 27 of the middle part 23 intended to receive the lug 8 of the strand 1 to allow the introduction of the connection means 11 of the antenna 22 into the housing 20 of the portable device.
  • all the electronic circuits of the portable device are arranged on a printed circuit board 39, or PCB ("printed circuit board"), which is the case in particular of the first electrical module 32.
  • PCB printed circuit board
  • said circuits may comprise clock-type circuits to enable the portable device to present hourly functionalities in addition to its specific functionalities related to the means of communication by radio waves.
  • FIGS. 4a to 4c better show the particular details related to the connection of the two electrical modules, namely the antenna and electronic circuits for processing the electrical signals received by said antenna.
  • the figure 4a represents a view similar to that of the figure 3 of which a portion has been enlarged, the strand 1 of the bracelet being closer to the middle part 23.
  • a spacer 40 has been added, resting on the PCB 39, its main function being to present a bearing surface 41, for the subsequent mounting steps, located in a plane substantially parallel to the PCB 39 plane and at a distance greater than the height of the highest electronic component carried by the PCB.
  • the spacer 40 comprises a housing 42 whose function will be explained later, in connection with the description of the Figures 4b and 4c .
  • the transverse dimensions housing 42 are substantially greater than the dimensions of all the contact pads 33 so as to allow the latter accessible through the housing.
  • the end 10 of the connection means 11 has four contact pads 43.
  • the second electrical module housed in the strand 1 may have a plurality of functions.
  • two 12 of the contact pads 43 are used to connect the terminals of the antenna 22 to the electronic circuits disposed in the housing 20, while the two remaining contact pads 43 may be used to connect another component.
  • charging means for a battery used as the power source of the portable device according to the invention and capable of establishing a conventional type of contact, ohmic, capacitive or inductive, with a adapted charger.
  • charging means of the inductive type provision is made to provide a charging coil (not shown) further on the substrate 13, the ends of which are connected to the remaining contact pads 43.
  • the Figures 4b and 4c present the establishment of a substantially parallelepipedal buffer 44 in the housing 42 of the spacer 40, after having disposed the strand 1 against the middle part 23, thus after having introduced the connection means 11 inside the housing 20.
  • the buffer 44 preferably made of elastic material such as rubber for example, is simply deposited inside the housing 42, in superposition of the end 10 of the connection means 11.
  • the latter has a thickness slightly greater than that of the spacer 40.
  • the upper face 45 of the buffer that is the one that is not in contact with the connection means 11, is presented protruding from the support surface 41 defined by the spacer 40.
  • FIG. figure 5 schematic sectional representation of the device which has just been described, once the bottom 24 is mounted on the middle part 23, provides a better understanding of the function of the buffer 44.
  • the general structure shown in FIG. figure 5 is similar to that shown on the figure 2 therefore the description of the common elements between these two figures will not be repeated for the figure 5 .
  • the PCB 39 carrying electronic components, whose first electrical module 32 is here electronic circuits for processing the signals received by the antenna 22.
  • An intermediate spacing element 46 is disposed between the LCD screen 31 and the PCB 39 to ensure a sufficient height between these two elements and to allow the arrangement of the components, such as the schematized module 47, on the PCB 39 in the intermediate space thus defined.
  • connection means 11 introduced into the housing 20 through the opening 27 of the middle part, are arranged between the spacer element 46 and the spacer 40, so that the contact pads 43 are arranged facing the corresponding contact pads 33 of the PCB 39.
  • Electric conduction tracks are further provided on the PCB 39 for electrically connecting the contact pads 33 with the first electrical module 32.
  • the power source used is a battery 48 of large diameter. It can be seen that the battery 48 is arranged directly with its first face against the bottom 24 of the housing 20, while its second face bears against the spacer 40.
  • the second face of the battery 48 is also supported on the face 45 of the buffer, so as to compress the latter and, to ensure the electrical contact between the contact pads 43 of the connection means 11 and the contact pads 33 of the PCB 39.
  • the assembly of the portable device according to the present invention can be summarized as follows.
  • the strand 1 is placed in the middle part 23, in which are already mounted a number of components such as the LCD screen 31 for example.
  • the connection means 11 of the antenna 22 are introduced inside the housing 20.
  • the spacer 40 is arranged in the middle part 23, if it was not yet done, then the buffer 44 in its housing 42.
  • the gasket 25 and the bottom 24 are mounted on the middle part 23, which has the effect of establishing the electrical connection between the contact pads 43 of the connection means 11 and the contact pads 33 of the PCB 39.
  • the fixing screws (not shown) of the housing 20 are put in place through the bottom 24 and the strand 1 into the middle 23, thus compressing the buffer 44 via the battery 48.
  • the buffer 44 being then compressed against the PCB 39, the connection means 11 can no longer be disconnected from the contact pads 33 of the PCB.
  • the intermediate spacer element 46 has, in its peripheral region situated opposite the opening 27, a rounding 49 to facilitate the sliding of the connection means 11.
  • the PCB 39 and the contact pads 33 are located substantially in the same plane as the opening 27, so that the end 10 of the connection means 11 does not require to be bent when it is inserted opposite the contact pads 33. In this case, it is easy to dispense with the rounding 49 described above.
  • the portable device according to the present invention advantageously makes it possible to establish an electrical connection between at least two electric modules without imposing the need to provide a specific step of establishing said connection, such as a screwing or welding step, when mounting the device.
  • the portable device according to the present invention is also capable of transmitting radio waves via the antenna 22.

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Abstract

The portable electronic wrist-watch comprises two electrical modules (20, 32), one situated in the casing (20), and one in a strand of the bracelet. An electrical connection (11) is provided linking the second module to the first module. This is retained in the body of the watch by compression when two halves of the shell are fitted together. The portable electronic module is in the style of a wrist-watch, and comprises a first electrical module (32) situated in the casing (20), and a second electrical module (22) situated in a strand of the bracelet. An electrical connection (11) is provided linking the second module to the first module. The casing includes a lower part (24) and an upper part (23). A route (27) is provided for introducing the connection to the box, and a moulded plastic block (36) ensures the establishment of contact between the connection (11) and the contact pads (33) of the first electrical module. Contact is maintained by force exerted when the two parts (23,24) of the casing (20) are fitted together.

Description

La présente invention concerne un dispositif portable comportant un boîtier dans lequel est disposé un premier module électrique, et un bracelet attaché au boîtier, le boîtier comprenant une partie supérieure et une partie inférieure qui coopèrent l'une avec l'autre pour réaliser le montage du boîtier, un second module électrique étant associé au bracelet ainsi que des moyens de connexion électrique assurant une connexion électrique entre les premier et second modules électriques au travers d'une ouverture ménagée dans le boîtier, le premier module électrique comprenant au moins un plot de contact électrique susceptible d'être connecté aux moyens de connexion électrique.The present invention relates to a portable device comprising a housing in which is disposed a first electrical module, and a bracelet attached to the housing, the housing comprising an upper part and a lower part which cooperate with each other to realize the assembly of the housing, a second electrical module being associated with the bracelet as well as electrical connection means providing an electrical connection between the first and second electrical modules through an opening in the housing, the first electrical module comprising at least one contact pad electrical capable of being connected to the electrical connection means.

Plus particulièrement, la présente invention concerne un tel dispositif portable comportant des moyens permettant d'établir un contact des moyens de connexion électrique avec le premier module électrique, à l'intérieur du boîtier, de manière amovible.More particularly, the present invention relates to such a portable device comprising means for establishing a contact of the electrical connection means with the first electrical module, inside the housing, removably.

Dans la présente description, on entendra par "moyens de connexion électrique" tout conducteur ou ensemble de conducteurs permettant d'assurer une liaison électrique entre deux modules électriques. De même, par "module électrique" on entendra tout dispositif destiné à fournir ou recevoir une alimentation électrique et, le cas échéant, à transmettre ou recevoir un signal électrique.In the present description, the term "electrical connection means" any conductor or set of conductors to provide an electrical connection between two electrical modules. Similarly, "electrical module" means any device for providing or receiving a power supply and, where appropriate, to transmit or receive an electrical signal.

Dans un mode de réalisation préféré, le dispositif électronique portable est réalisé sous la forme d'une instrument électronique portable se présentant sous la forme d'une montre bracelet comportant des moyens de réception, et éventuellement d'émission, de signaux du type radiofréquence. Dans ce cas, le premier module électrique comprend des circuits électroniques de traitement de signaux électriques échangés avec le second module électrique, ce dernier comprenant une antenne.In a preferred embodiment, the portable electronic device is made in the form of a portable electronic instrument in the form of a wristwatch having means for receiving, and possibly transmitting, radiofrequency type signals. In this case, the first electrical module comprises electronic circuits for processing electrical signals exchanged with the second electrical module, the latter comprising an antenna.

De tels dispositifs portables ont déjà été décrits dans l'art antérieur proposant diverses solutions concernant les moyens de fixation des moyens de connexion électrique avec le premier module électrique.Such portable devices have already been described in the prior art proposing various solutions concerning the means for fixing the electrical connection means with the first electrical module.

Le brevet européen No 0 631 341 décrit un instrument électronique du type montre-bracelet comportant une antenne logée dans le bracelet et connectée à des circuits électroniques de traitement des signaux reçus par l'antenne. Les circuits électroniques de traitement sont disposés à l'intérieur du boîtier de l'instrument sur un circuit imprimé. Des plots de connexion sont ménagés sur une région périphérique du circuit imprimé pour permettre l'établissement d'une connexion électrique entre les bornes de connexion de l'antenne et les circuits électroniques de traitement. La solution décrite dans ce document pour assurer la connexion électrique entre les bornes de l'antenne et les plots de connexion du circuit imprimé consiste à utiliser des vis de fixation traversant des ouvertures adaptées, ménagées dans les bornes de l'antenne, et vissées dans le circuit imprimé au niveau des plots de connexion.The European Patent No. 0 631 341 describes an electronic instrument of the wristwatch type comprising an antenna housed in the bracelet and connected to electronic circuits for processing the signals received by the antenna. The electronic processing circuits are disposed inside the instrument housing on a printed circuit board. Connection pads are provided on a peripheral region of the printed circuit to enable the establishment of an electrical connection between the Antenna connection terminals and electronic processing circuits. The solution described in this document to provide the electrical connection between the terminals of the antenna and the connection pads of the printed circuit consists of using fixing screws passing through adapted openings formed in the terminals of the antenna, and screwed into the printed circuit at the connection pads.

Cette solution présente toutefois certains inconvénients, notamment au moment du montage de l'instrument électronique dans la mesure où il est nécessaire de prévoir des trous dans le circuit imprimé pour recevoir les vis et dans la mesure où une étape de vissage est indispensable. En outre, un remplacement ultérieur de l'antenne en cas de problème rend indispensable un démontage complet du boîtier de l'instrument, avant de pouvoir accéder aux vis de fixation, ce qui peut rendre cette opération fastidieuse.This solution, however, has certain disadvantages, especially when mounting the electronic instrument insofar as it is necessary to provide holes in the printed circuit to receive the screws and to the extent that a screwing step is essential. In addition, a subsequent replacement of the antenna in case of a problem makes a complete disassembly of the instrument casing necessary before access to the fixing screws can be made, which can make this operation tedious.

Une solution différente pour assurer la connexion des bornes de l'antenne aux circuits électroniques de traitement est exposée dans ce même brevet au titre de la présentation de l'art antérieur. Cette alternative est basée sur l'utilisation d'un connecteur du type lame ressort, pour chaque borne de l'antenne, sur laquelle vient s'appuyer un conducteur électrique relié à l'une des bornes de l'antenne.A different solution to ensure the connection of the antenna terminals to the electronic processing circuits is disclosed in this same patent for the presentation of the prior art. This alternative is based on the use of a spring blade type connector, for each terminal of the antenna, on which is supported an electrical conductor connected to one of the terminals of the antenna.

Un tel mode de réalisation rend le montage du bracelet et de l'antenne plus aisé que dans la solution précédemment décrite dans la mesure où il suffit d'enficher le conducteur électrique dans une ouverture du boîtier pour établir le contact électrique.Such an embodiment makes mounting the bracelet and the antenna easier than in the previously described solution insofar as it is sufficient to plug the electrical conductor into an opening of the housing to establish the electrical contact.

Toutefois, cette solution présente également des inconvénients, en particulier du point de vue de la tenue dans le temps. En effet, la lame ressort est typiquement soudée sur le circuit imprimé, ce qui doit être réalisé avec soin pour garantir une résistance mécanique suffisante par rapport aux contraintes perpendiculaires qui s'exercent sur la lame, une fois que le conducteur électrique est placé en appui contre elle. On peut noter en outre que les surfaces de contact entre la lame et le conducteur électrique ne sont pas protégées, ce qui peut conduire à des problèmes de stabilité de la connexion électrique, du fait notamment d'une oxydation possible des surfaces métalliques libres. De plus, cette solution présente un encombrement relativement important et ne peut par conséquent pas convenir pour la réalisation d'un instrument de faible volume.However, this solution also has drawbacks, in particular from the point of view of the durability. Indeed, the leaf spring is typically welded to the printed circuit, which must be done carefully to ensure sufficient mechanical strength compared to the perpendicular stresses that are exerted on the blade, once the electrical conductor is placed in support against her. It may further be noted that the contact surfaces between the blade and the electrical conductor are not protected, which can lead to problems of stability of the electrical connection, in particular due to possible oxidation of the free metal surfaces. In addition, this solution has a relatively large footprint and therefore can not be suitable for the realization of a small volume instrument.

Dans le brevet US 4,947,179 , il est décrit une montre dont l'antenne logée dans le bracelet est connectée électriquement de manière amovible à un plot électrique d'un module électrique logé à l'intérieur du boîtier. Le plot électrique est électriquement relié au module à travers une ouverture isolée pratiquée dans le boîtier. Une extrémité en forme de prise de l'antenne du bracelet vient d'enficher sur une tige du plot de contact relié au module afin d'établir une connexion électrique. Une partie extérieure est vissée sur le boîtier de la montre pour maintenir le bracelet au boîtier et pour maintenir en contact électrique la prise sur la tige.In the US Patent 4,947,179 , there is described a watch whose antenna housed in the bracelet is removably electrically connected to an electrical pad of an electrical module housed inside the housing. The electrical pad is electrically connected to the module through an insulated opening in the housing. An antenna-shaped end of the bracelet has just plugged into a rod of the contact pad connected to the module to establish an electrical connection. An outer portion is screwed onto the watch case to hold the bracelet to the case and to maintain electrical contact with the socket on the stem.

Un inconvénient d'une telle solution proposée dans le brevet US 4,947,179 , est qu'il ne garantit pas une bonne tenue mécanique dans le temps au niveau de la connexion électrique entre l'antenne et le plot de contact du module électrique, et n'est pas bien isolé des conditions environnementales.A disadvantage of such a solution proposed in the US Patent 4,947,179 is that it does not guarantee a good mechanical strength in time at the electrical connection between the antenna and the contact pad of the electrical module, and is not well isolated from environmental conditions.

Le but de la présente invention est de perfectionner les dispositifs électroniques de ce genre de façon à éviter les inconvénients précités.The object of the present invention is to improve the electronic devices of this kind so as to avoid the aforementioned drawbacks.

Dans ce but, l'invention prévoit un dispositif portable du type indiqué plus haut, caractérisé par le fait que le montage du boîtier assure l'établissement d'un contact électrique, par compression, entre lesdits moyens de connexion et ledit plot de contact.For this purpose, the invention provides a portable device of the type indicated above, characterized in that the mounting of the housing ensures the establishment of an electrical contact, by compression, between said connection means and said contact pad.

En outre, on prévoit des moyens de fixation pour maintenir ensemble les parties inférieure et supérieure du boîtier, tels que des vis par exemple, la mise en oeuvre de ces moyens de fixation permettant de garantir le maintien du contact électrique entre les moyens de connexion et le plot de contact.In addition, there are provided fixing means for holding together the lower and upper parts of the housing, such as screws for example, the implementation of these fixing means to ensure the maintenance of the electrical contact between the connection means and the contact pad.

Grâce à la structure selon la présente invention, le second module électrique logé dans le bracelet du dispositif portable peut être déconnecté du premier module électrique par un simple dégagement mutuel des deux parties du boîtier. En effet, le fait d'écarter les deux parties du boîtier l'une de l'autre permet de soulager les pressions respectivement exercées sur les moyens de connexion du second module électrique et sur le plot de contact du premier module électrique.Thanks to the structure according to the present invention, the second electrical module housed in the bracelet of the portable device can be disconnected from the first electrical module by simply disengaging the two parts of the housing. Indeed, the fact of spreading the two parts of the housing from one another can relieve the pressure respectively exerted on the connecting means of the second electrical module and the contact pad of the first electrical module.

Dans un mode de réalisation préféré de la présente invention, le dispositif électronique portable est un instrument du type montre-bracelet présentant des moyens de communication utilisant des ondes radiofréquences. On prévoit donc de loger une antenne dans le bracelet, reliée à des circuits électroniques de traitement des signaux reçus par l'antenne, ces circuits étant agencés dans le boîtier de l'instrument.In a preferred embodiment of the present invention, the portable electronic device is a wristwatch type instrument having communication means using radio frequency waves. It is therefore expected to house an antenna in the bracelet, connected to electronic processing circuit signals received by the antenna, these circuits being arranged in the instrument housing.

Dans ce cas, on prévoit également des conducteurs électriques pour connecter les deux bornes de l'antenne aux circuits électroniques de traitement, les conducteurs étant agencés au travers d'une ouverture ménagée dans le boîtier de l'instrument. Lors de la mise en place de l'antenne, des régions des conducteurs électriques sont amenées en regard de plots de contact disposés sur un circuit imprimé portant les circuits électroniques de traitement.In this case, electrical conductors are also provided to connect the two terminals of the antenna to the electronic processing circuits, the conductors being arranged through an opening in the instrument housing. During the installation of the antenna, regions of the electrical conductors are brought opposite contact pads arranged on a printed circuit carrying the electronic processing circuits.

On prévoit alors des moyens pour comprimer ces régions des conducteurs électriques contre les plots de contact lors du montage des parties inférieure et supérieure du boîtierMeans are then provided for compressing these regions of the electrical conductors against the contact pads during assembly of the lower and upper housing parts.

Ces moyens peuvent être simplement réalisés sous la forme de pieds fabriqués d'une pièce, respectivement avec les parties inférieure et supérieure du boîtier et situés en regard des plots de contact du circuit imprimé.These means can be simply made in the form of feet manufactured in one piece, respectively with the lower and upper parts of the housing and located opposite the contact pads of the printed circuit.

Selon un mode de réalisation préféré, des moyens supplémentaires sont prévus pour effectuer la compression des moyens de connexion contre les plots de contact.According to a preferred embodiment, additional means are provided for compressing the connection means against the contact pads.

Grâce aux caractéristiques de l'invention, un démontage complet du boîtier n'est pas nécessaire pour effectuer le démontage du bracelet et de l'antenne. En outre, la connexion de l'antenne aux circuits électroniques de traitement est fiable et présente une bonne tenue dans le temps.Thanks to the features of the invention, complete disassembly of the housing is not necessary to perform the disassembly of the bracelet and the antenna. In addition, the connection of the antenna to the electronic processing circuits is reliable and has a good behavior over time.

L'invention sera mieux comprise à l'aide de la description suivante de deux exemples d'exécution en référence aux dessins annexés, dans lesquels :

  • la figure 1 est une vue en perspective du bracelet prévu pour le dispositif portable selon un mode de réalisation préféré de l'invention;
  • la figure 2 est une vue schématique en coupe partielle du dispositif portable selon un premier mode de réalisation de la présente invention;
  • la figure 3 est une vue en perspective du dispositif portable selon un second mode de réalisation de la présente invention, sans la partie inférieure du boîtier;
  • les figures 4a à 4c sont des vues agrandies de la partie encadrée de la figure 3 représentant des étapes successives de la mise en place des moyens de connexion électrique du second module électrique dans la partie supérieure du boîtier et de l'établissement du contact électrique avec le premier module électrique;
  • la figure 5 est une vue schématique en coupe du boîtier monté du dispositif portable selon le mode de réalisation représenté sur la figure 3.
The invention will be better understood with the aid of the following description of two exemplary embodiments with reference to the appended drawings, in which:
  • the figure 1 is a perspective view of the strap provided for the portable device according to a preferred embodiment of the invention;
  • the figure 2 is a schematic partial sectional view of the portable device according to a first embodiment of the present invention;
  • the figure 3 is a perspective view of the portable device according to a second embodiment of the present invention, without the lower part of the housing;
  • the Figures 4a to 4c are enlarged views of the framed part of the figure 3 representing successive steps of the establishment of the electrical connection means of the second electrical module in the upper part of the housing and the establishment of the electrical contact with the first electrical module;
  • the figure 5 is a schematic sectional view of the mounted casing of the portable device according to the embodiment shown in FIG. figure 3 .

Les modes de réalisation décrits concernent un dispositif électronique portable particulier à titre d'exemple non limitatif, à savoir un instrument du type montre-bracelet présentant des fonctionnalités au moins de réception d'ondes radiofréquences.The embodiments described relate to a particular portable electronic device by way of non-limiting example, namely a wristwatch type instrument having at least radio frequency wave reception functionalities.

La figure 1 représente un mode de réalisation préféré du brin 1 du bracelet selon la présente invention portant la boucle 2 avec son ardillon 3. Le bracelet est obtenu par moulage de matières plastiques et présente une apparence extérieure de type conventionnel. On constate sur la figure 1 que le brin 1 représenté comporte trois éléments constitutifs principaux. Le brin 1 est obtenu par un assemblage de deux "demi-brins" dans son épaisseur, un premier demi-brin interne 4 et un second demi-brin externe 5. Le troisième élément constitutif du brin est un élément de renfort 6, disposé au niveau de l'extrémité du brin 1 destinée à être liée au boîtier de la montre. L'élément de renfort 6 est réalisé en un matériau plastique présentant une rigidité plus importante que celle des matériaux choisis pour la fabrication des demi-brins 4 et 5, de façon à garantir la solidité de la liaison entre le boîtier et le brin 1. Des trous 7 sont prévus dans l'élément de renfort 6 et dans le demi-brin interne 4 pour recevoir des vis de fixation (non représentées) du brin 1 au boîtier de la montre.The figure 1 represents a preferred embodiment of the strand 1 of the bracelet according to the present invention carrying the buckle 2 with its pin 3. The bracelet is obtained by molding plastic materials and has an external appearance of conventional type. We see on the figure 1 that the strand 1 shown has three main constituent elements. The strand 1 is obtained by an assembly of two "half-strands" in its thickness, a first internal half-strand 4 and a second external half-strand 5. The third constituent element of the strand is a reinforcing element 6, disposed at level of the end of strand 1 intended to be linked to the watch case. The reinforcing element 6 is made of a plastic material having greater rigidity than that of the materials chosen for the manufacture of the half-strands 4 and 5, so as to guarantee the strength of the connection between the housing and the strand 1. Holes 7 are provided in the reinforcing element 6 and in the inner half-strand 4 to receive fixing screws (not shown) of the strand 1 to the watch case.

On constate en outre qu'un ergot 8, dont la fonction sera exposée plus loin, est ménagé au niveau de l'extrémité du brin 1 destinée à être liée au boîtier de la montre. Préférablement, l'ergot 8 est réalisé d'une pièce avec le demi-brin interne 4, par un moulage de type conventionnel, et comprend un trou central 9.It is further noted that a lug 8, whose function will be explained later, is provided at the end of the strand 1 intended to be linked to the watch case. Preferably, the lug 8 is made in one piece with the internal half-strand 4, by a conventional type of molding, and comprises a central hole 9.

L'extrémité libre 10 de moyens de connexion électrique 11 est apparente, les moyens de connexion sortant du brin 1 par le trou central 9 de l'ergot 8. Ces moyens de connexion 11 sont prévus pour connecter notamment les bornes d'une antenne (visible sur la figure 2) disposée entre les deux demi-brins 4 et 5 du bracelet lors de leur assemblage. Les moyens de connexion 11 comprennent en particulier des pistes conductrices (non représentées) dont les extrémités sont conformées en plages de contact 12, les pistes étant portées par un substrat flexible 13.The free end 10 of electrical connection means 11 is apparent, the connection means leaving the strand 1 through the central hole 9 of the lug 8. These means 11 are provided to connect in particular the terminals of an antenna (visible on the figure 2 ) disposed between the two half-strands 4 and 5 of the bracelet during their assembly. The connection means 11 comprise in particular conductive tracks (not shown) whose ends are shaped as contact pads 12, the tracks being carried by a flexible substrate 13.

La figure 2 est une vue en coupe partielle du brin 1 de bracelet assemblé sur le boîtier 20 de l'instrument selon un premier mode de réalisation de l'invention. La représentation a volontairement été simplifiée dans le but de rendre plus visibles les caractères particuliers de la présente invention.The figure 2 is a partial sectional view of the bracelet strand 1 assembled on the housing 20 of the instrument according to a first embodiment of the invention. The representation has been deliberately simplified in order to make more visible the particular characters of the present invention.

On distingue, sur la vue de la figure 2, que le brin 1 comprend, entre ses deux demi-brins 4 et 5, un substrat 13 portant une antenne 22. Préférablement, le type d'antenne utilisé est à piste conductrice déposée sur un substrat flexible sous la forme d'une spirale. On pourra notamment se référer au contenu de la demande de brevet européen No 01204565.4 du même déposant et intitulée "Antenne de réception d'ondes VHF logée dans un bracelet de dispositif électronique portable" pour tous les détails de réalisation concernant l'antenne 22.We distinguish, on the view of the figure 2 , that the strand 1 comprises, between its two half-strands 4 and 5, a substrate 13 carrying an antenna 22. Preferably, the type of antenna used is conductive track deposited on a flexible substrate in the form of a spiral. In particular, one may refer to the content of the patent application No 01204565.4 of the same applicant and entitled "VHF wave reception antenna housed in a portable electronic device bracelet" for all details of implementation concerning the antenna 22.

Le boîtier 20 de l'instrument comporte principalement une partie supérieure 23, ou carrure, et une partie inférieure 24, ou fond, la carrure et le fond étant séparés par un joint 25 assurant l'étanchéité du boîtier 20. Le boîtier est en outre fermé sur le dessus par une glace 26, de type conventionnel et réalisée par exemple en plastique ou en saphir selon le niveau de gamme souhaité.The housing 20 of the instrument mainly comprises an upper portion 23, or middle part, and a lower part 24, or bottom, the middle and the bottom being separated by a seal 25 sealing the housing 20. The housing is furthermore closed on the top by an ice 26, of conventional type and made for example of plastic or sapphire depending on the desired level of range.

La carrure 23 présente une ouverture 27 sur son flanc dans laquelle est inséré l'ergot 8 du brin 1 de bracelet. De ce fait, les dimensions transversales de l'ergot 8 sont préférablement choisies légèrement supérieures à celles de l'ouverture 27. Ainsi, l'ergot 8 est logé à friction dans l'ouverture 27 et assure lui-même l'étanchéité du boîtier au niveau de l'ouverture. Ce détail de construction permet avantageusement de se passer de l'utilisation d'un joint d'étanchéité additionnel à cet endroit pour effectuer l'introduction des moyens de connexion 11 de l'antenne 22 à l'intérieur du boîtier 20. On peut également prévoir des bourrelets de matière (non représentés) moulés avec l'ergot 8 pour garantir l'étanchéité au niveau de l'ouverture 27.The middle 23 has an opening 27 on its side in which is inserted the lug 8 of the strand 1 bracelet. Therefore, the transverse dimensions of the lug 8 are preferably chosen slightly greater than those of the opening 27. Thus, the lug 8 is frictionally housed in the opening 27 and itself ensures the sealing of the housing at the opening level. This construction detail advantageously makes it possible to dispense with the use of an additional seal at this point to effect the introduction of the connection means 11 of the antenna 22 inside the housing 20. It is also possible to provide bead material (not shown) molded with the lug 8 to ensure sealing at the opening 27.

On constate également que l'élément de renfort 6 présente une partie fine 28 s'étendant à l'intérieur du trou central 9 de l'ergot 8, appuyée contre les moyens de connexion 11 de l'antenne, permettant ainsi de garantir une certaine rigidité à l'ergot 8 dont les déformations éventuelles pourraient s'avérer nuisibles du point de vue de l'étanchéité de l'instrument. On peut également noter que les déformations éventuelles de l'ergot 8 sont susceptibles d'endommager l'antenne 22, ce qui est évité ici.It can also be seen that the reinforcing element 6 has a thin portion 28 extending inside the central hole 9 of the lug 8, resting against the connection means 11 of the antenna, thus making it possible to guarantee a certain rigidity with the pin 8 whose possible deformations could be detrimental from the point of view of the tightness of the instrument. It may also be noted that the possible deformations of the lug 8 are likely to damage the antenna 22, which is avoided here.

La partie périphérique 29 du fond 24 présente une forme complémentaire à celle de l'extrémité du demi-brin interne 4 destinée à être fixée au boîtier 20 de l'instrument. De même, la carrure 23 présente une forme sensiblement complémentaire de celle de la partie du brin 1 destinée à être disposée en regard de la carrure 23. Ainsi, le brin 1 est coincé entre la carrure 23 et le fond 24. Comme on l'a vu en relation avec la figure 1, des vis sont prévues pour fixer le brin 1 au boîtier 20. On peut noter que, selon une alternative préférée, ces vis traversent également des trous (non représentés) ménagés dans le fond 24, au niveau de sa partie périphérique 29, pour permettre le montage du boîtier 20.The peripheral portion 29 of the bottom 24 has a shape complementary to that of the end of the inner half-strand 4 intended to be fixed to the housing 20 of the instrument. Similarly, the middle part 23 has a shape substantially complementary to that of the part of the strand 1 intended to be arranged facing the middle part 23. Thus, the strand 1 is wedged between the middle part 23 and the bottom 24. As it is saw in relation to the figure 1 , screws are provided for fixing the strand 1 to the housing 20. It may be noted that, according to a preferred alternative, these screws also pass through holes (not shown) formed in the bottom 24, at its peripheral portion 29, to allow mounting the housing 20.

Le boîtier 20 renferme des circuits électroniques 30 permettant notamment de commander des moyens d'affichage, schématisés sur la figure 2 par un écran à cristaux liquides 31, ou écran LCD. Les circuits électroniques 30 peuvent en outre comporter des moyens pour assurer diverses fonctions additionnelles, tel qu'un mouvement horloger de type conventionnel par exemple, pour permettre un affichage de l'heure courante. Bien entendu, on prévoit une source d'alimentation (représentée avec la référence 48 sur la figure 5) pour alimenter les divers composants de l'instrument selon l'invention.The housing 20 contains electronic circuits 30, in particular for controlling display means, schematized on the figure 2 by a liquid crystal screen 31, or LCD screen. The electronic circuits 30 may further comprise means for providing various additional functions, such as a watch movement of conventional type for example, to allow a display of the current time. Of course, a power source is provided (shown with reference 48 on the figure 5 ) to supply the various components of the instrument according to the invention.

Les circuits électroniques 30 sont en outre reliés électriquement à un premier module électrique 32 comprenant, dans l'exemple illustré, des circuits électroniques de traitement des signaux reçus par l'antenne 22. Le premier module électrique comporte des plots de contact 33 prévus pour être mis en contact avec les plages de contact 12 de l'antenne 22.The electronic circuits 30 are furthermore electrically connected to a first electrical module 32 comprising, in the illustrated example, electronic circuits for processing the signals received by the antenna 22. The first electrical module comprises contact pads 33 intended to be brought into contact with the contact pads 12 of the antenna 22.

Bien entendu, on peut prévoir un seul circuit électronique regroupant l'ensemble des circuits électroniques 30, dont le mouvement horloger, et le module électrique 32 avec ses circuits électroniques de traitement des signaux.Of course, it is possible to provide a single electronic circuit uniting all the electronic circuits 30, including the watch movement, and the electrical module 32 with its electronic signal processing circuits.

Divers moyens conventionnels sont prévus pour positionner les différents composants présents dans le boîtier 20. On peut notamment remarquer que la carrure 23 comporte un réhaut 34 présentant un épaulement 35 contre lequel l'écran LCD 31 est disposé en appui. De même, le module électrique 32 est disposé en appui contre l'écran LCD 31, soit directement, soit par l'intermédiaire d'éléments additionnels (non représentés), éventuellement du type entretoise. De plus, on peut prévoir que des régions périphériques de certains composants disposés dans la carrure 23 arrivent en butée contre des régions de cette dernière, comme c'est le cas pour le module électrique 32 sur la figure 2.Various conventional means are provided for positioning the various components present in the housing 20. It may be noted in particular that the middle part 23 comprises a flange 34 having a shoulder 35 against which the LCD screen 31 is disposed in abutment. Similarly, the electrical module 32 is disposed in abutment against the LCD screen 31, either directly or via additional elements (not shown), possibly of the spacer type. In addition, it can be provided that peripheral regions of certain components arranged in the middle part 23 abut against regions of the latter, as is the case for the electrical module 32 on the figure 2 .

On peut en outre prévoir des pieds, dont un seul 36 est représenté schématiquement sur la figure 2, pour positionner notamment les circuits électroniques 30. Préférablement, les circuits électroniques 30 sont portés par une carte à circuits imprimés (non représentée) comportant des trous traversant en différents emplacements, prévus pour coopérer avec les pieds de positionnement, une telle structure étant connue.In addition, feet can be provided, of which only one 36 is shown schematically on the figure 2 , in particular to position the electronic circuits 30. Preferably, the electronic circuits 30 are carried by a printed circuit board (not shown) having through holes in different locations, provided to cooperate with the positioning feet, such a structure being known.

Toutefois, dans le cadre de la présente invention, le pied 36 présente une seconde fonction en plus de sa fonction conventionnelle de positionnement des circuits électroniques. En effet, il est apparent de la figure 2 que, lorsque le boîtier 20 du dispositif portable est monté, l'extrémité 10 des moyens de connexion 11 se trouve comprimée par le pied 36 contre les plots de contact 33 du premier module électrique 32.However, in the context of the present invention, the foot 36 has a second function in addition to its conventional function of positioning the electronic circuits. Indeed, it is apparent from the figure 2 when the housing 20 of the portable device is mounted, the end 10 of the connection means 11 is compressed by the foot 36 against the contact pads 33 of the first electrical module 32.

Ainsi, le simple montage des parties supérieure, c'est-à-dire la carrure 23, et inférieure, c'est-à-dire le fond 24, entraîne l'établissement d'une connexion électrique entre un premier et un second modules électriques, c'est-à-dire ici des circuits électroniques 32 de traitement de signaux et une antenne 22. Des moyens d'établissement de cette connexion électrique spécifiques, tels qu'une soudure ou une vis ne sont pas nécessaires contrairement à ce qui est connu de l'art antérieur. De même, l'étape de mise en place d'un tel moyen d'établissement de la connexion électrique, lors du montage du boîtier, est avantageusement supprimée.Thus, the simple assembly of the upper parts, that is to say the middle 23, and lower, that is to say the bottom 24, leads to the establishment of an electrical connection between a first and a second modules electrical means, that is to say here 32 electronic signal processing circuits and an antenna 22. Specific means for establishing this electrical connection, such as a weld or a screw are not necessary contrary to what is known from the prior art. Similarly, the step of setting up such a means for establishing the electrical connection, when mounting the housing, is advantageously eliminated.

Un avantage supplémentaire de la structure selon la présente invention provient du fait que le premier module électrique 32 et l'ergot 8 du bracelet, donc l'extrémité 10 des moyens de connexion 11, sont positionnés par rapport à une seule et même référence à savoir la carrure 23. Par conséquent, une bonne fiabilité dans l'agencement de ces composants peut être obtenue lors du montage, dans la mesure où il ne dépend pas de tolérances sur les dimensions ou le positionnement d'autres composants du boîtier 20.An additional advantage of the structure according to the present invention stems from the fact that the first electrical module 32 and the lug 8 of the bracelet, and therefore the end 10 of the connection means 11, are positioned with respect to a single reference namely Therefore, a good reliability in the arrangement of these components can be obtained during assembly, insofar as it does not depend on tolerances on the dimensions or the positioning of other components of the housing 20.

En ce qui concerne le pied 36, il est préférablement réalisé en même temps que le fond par moulage de matière plastique, voire métallique. Alternativement, on peut prévoir de le réaliser sous la forme d'un tube sur lequel est inséré à force un élément additionnel dont la face destinée à entrer en contact avec l'extrémité 10 des moyens de connexion 11 est sensiblement plane et recouvre une surface au moins égale à celle des plots de contact 33. De préférence, cet élément additionnel est élastique de telle manière que la face susmentionnée peut se déformer pour garantir une bonne qualité de contact entre les moyens de connexion 11 et les plots de contact 33.As regards the foot 36, it is preferably made at the same time as the bottom by molding plastic material, or even metal. Alternatively, it can be provided in the form of a tube on which is inserted by force an additional element whose face intended to come into contact with the end 10 of the connection means 11 is substantially flat and covers a surface at less than that of the contact pads 33. Preferably, this additional element is elastic so that the aforementioned face can be deformed to ensure a good quality of contact between the connection means 11 and the contact pads 33.

La figure 3 représente en perspective une partie du dispositif portable selon un second mode de réalisation préféré de la présente invention. On reconnaît sur cette figure le brin 1 de bracelet précédemment décrit en relation avec la figure 1. On a également représenté en vue de dessous une carrure 23 similaire à celle décrite en relation avec la figure 2 et, dans laquelle n'est visible qu'une partie des composants prévus dans le boîtier 20. Au stade illustré sur la figure 3, le brin 1 est prêt à être mis en place sur la carrure 23.The figure 3 represents in perspective a portion of the portable device according to a second preferred embodiment of the present invention. This figure shows the strand 1 of the bracelet previously described in relation to the figure 1 . Also shown in view from below a middle 23 similar to that described in relationship with the figure 2 and, in which is visible only a portion of the components provided in the housing 20. At the stage illustrated on the figure 3 , the strand 1 is ready to be put in place on the middle part 23.

On constate, sur cette vue, que la carrure 23 comporte une pluralité de surfaces de guidage 37 destinées à coopérer avec des surfaces de l'extrémité du brin 1 prévue pour être fixée au boîtier 20. On peut voir en particulier que la carrure 23 comporte une surface 38 de section complémentaire à environ la moitié de celle de l'ergot 8 et assurant par conséquent une fonction de guide radial pour le brin 1.In this view, it can be seen that the middle part 23 comprises a plurality of guide surfaces 37 intended to cooperate with surfaces of the end of the strand 1 intended to be fixed to the housing 20. It can be seen in particular that the middle part 23 comprises a surface 38 of complementary section to about half that of the lug 8 and thus providing a radial guide function for the strand 1.

La figure 3 laisse en outre apparaître, en regard de la surface 38 de guidage, l'ouverture 27 de la carrure 23 destinée à recevoir l'ergot 8 du brin 1 pour permettre l'introduction des moyens de connexion 11 de l'antenne 22 dans le boîtier 20 du dispositif portable.The figure 3 also leaves, facing the guide surface 38, the opening 27 of the middle part 23 intended to receive the lug 8 of the strand 1 to allow the introduction of the connection means 11 of the antenna 22 into the housing 20 of the portable device.

Dans le présent mode de réalisation, l'ensemble des circuits électroniques du dispositif portable est agencé sur une carte à circuit imprimé 39, ou PCB ("Printed Circuit Board"), ce qui est le cas en particulier du premier module électrique 32. L'agencement de ces circuits électroniques ne faisant toutefois pas partie du coeur de la présente invention, il ne sera pas décrit plus en détail. On peut noter que dans une variante préférée, lesdits circuits peuvent comprendre des circuits du type horloger pour permettre au dispositif portable de présenter des fonctionnalités horaires en plus de ses fonctionnalités spécifiques liées aux moyens de communication par ondes radio.In the present embodiment, all the electronic circuits of the portable device are arranged on a printed circuit board 39, or PCB ("printed circuit board"), which is the case in particular of the first electrical module 32. However, since these electronic circuits are not part of the core of the present invention, they will not be described in more detail. It may be noted that, in a preferred variant, said circuits may comprise clock-type circuits to enable the portable device to present hourly functionalities in addition to its specific functionalities related to the means of communication by radio waves.

Les autres éléments visibles sur la figure 3 n'ayant pas de lien direct avec le problème résolu par l'invention, ils ne seront pas abordés ici dans la mesure où l'homme du métier ne rencontrera pas de difficulté particulière pour les mettre en oeuvre.The other visible elements on the figure 3 not having a direct link with the problem solved by the invention, they will not be discussed here to the extent that the skilled person will not encounter any particular difficulty to implement them.

Les figures 4a à 4c laissent mieux apparaître les détails particuliers liés à la connexion des deux modules électriques, à savoir de l'antenne et des circuits électroniques de traitement des signaux électriques réceptionnés par ladite antenne.The Figures 4a to 4c better show the particular details related to the connection of the two electrical modules, namely the antenna and electronic circuits for processing the electrical signals received by said antenna.

La figure 4a représente une vue similaire à celle de la figure 3 de laquelle une partie a été agrandie, le brin 1 de bracelet étant plus proche de la carrure 23.The figure 4a represents a view similar to that of the figure 3 of which a portion has been enlarged, the strand 1 of the bracelet being closer to the middle part 23.

Entre ces deux figures, on constate qu'une entretoise 40 a été ajoutée, en appui sur le PCB 39, sa fonction principale étant de présenter une surface d'appui 41, pour les étapes de montage ultérieures, située dans un plan sensiblement parallèle au plan du PCB 39 et à une distance supérieure à la hauteur du composant électronique le plus haut porté par le PCB.Between these two figures, it can be seen that a spacer 40 has been added, resting on the PCB 39, its main function being to present a bearing surface 41, for the subsequent mounting steps, located in a plane substantially parallel to the PCB 39 plane and at a distance greater than the height of the highest electronic component carried by the PCB.

L'entretoise 40 comporte un logement 42 dont la fonction sera exposée plus loin, en relation avec la description des figures 4b et 4c. Les dimensions transversales du logement 42 sont sensiblement supérieures aux dimensions de l'ensemble des plots de contact 33 de manière à laisser ces derniers accessibles au travers du logement.The spacer 40 comprises a housing 42 whose function will be explained later, in connection with the description of the Figures 4b and 4c . The transverse dimensions housing 42 are substantially greater than the dimensions of all the contact pads 33 so as to allow the latter accessible through the housing.

On peut noter, sur la figure 4a, que l'extrémité 10 des moyens de connexion 11 présente quatre plages de contact 43. En effet, comme on l'a mentionné plus haut, le second module électrique logé dans le brin 1 peut présenter une pluralité de fonctions. Ainsi, deux 12 des plages de contact 43 sont utilisées pour connecter les bornes de l'antenne 22 aux circuits électroniques disposés dans le boîtier 20, tandis que les deux plages de contact 43 restantes peuvent être utilisées pour connecter un autre composant. A titre d'exemple, on peut prévoir des moyens de charge d'une batterie utilisée comme la source d'alimentation du dispositif portable selon l'invention et susceptibles d'établir un contact de type conventionnel, ohmique, capacitif ou inductif, avec un chargeur adapté. Dans le cas de moyens de charge du type inductif, on prévoit de ménager une bobine de charge (non représentée) en outre sur le substrat 13, dont les extrémités sont connectées aux plages de contact 43 restantes.We can note, on the figure 4a , that the end 10 of the connection means 11 has four contact pads 43. Indeed, as mentioned above, the second electrical module housed in the strand 1 may have a plurality of functions. Thus, two 12 of the contact pads 43 are used to connect the terminals of the antenna 22 to the electronic circuits disposed in the housing 20, while the two remaining contact pads 43 may be used to connect another component. For example, it is possible to provide charging means for a battery used as the power source of the portable device according to the invention and capable of establishing a conventional type of contact, ohmic, capacitive or inductive, with a adapted charger. In the case of charging means of the inductive type, provision is made to provide a charging coil (not shown) further on the substrate 13, the ends of which are connected to the remaining contact pads 43.

L'homme du métier intéressé par ces fonctionnalités supplémentaires pourra se référer en particulier au contenu des demandes de brevet européen No 01204557.1 et No 01204691.8 déposées par le même demandeur.Those skilled in the art interested in these additional functionalities may refer in particular to the content of the European patent applications No 01204557.1 and No. 01204691.8 filed by the same applicant.

Les figures 4b et 4c présentent la mise en place d'un tampon 44 sensiblement parallélépipédique dans le logement 42 de l'entretoise 40, après avoir disposé le brin 1 contre la carrure 23, donc après avoir introduit les moyens de connexion 11 à l'intérieur du boîtier 20.The Figures 4b and 4c present the establishment of a substantially parallelepipedal buffer 44 in the housing 42 of the spacer 40, after having disposed the strand 1 against the middle part 23, thus after having introduced the connection means 11 inside the housing 20.

Le tampon 44, préférablement réalisé en matériau élastique tel que du caoutchouc par exemple, est simplement déposé à l'intérieur du logement 42, en superposition de l'extrémité 10 des moyens de connexion 11.The buffer 44, preferably made of elastic material such as rubber for example, is simply deposited inside the housing 42, in superposition of the end 10 of the connection means 11.

Comme on le constate sur la figure 4c représentant le tampon 44 mis en place, ce dernier présente une épaisseur légèrement supérieure à celle de l'entretoise 40. Ainsi, la face 45 supérieure du tampon, soit celle qui n'est pas en contact avec les moyens de connexion 11, se présente en saillie par rapport à la surface 41 d'appui définie par l'entretoise 40.As we see on the figure 4c representing the buffer 44 placed in place, the latter has a thickness slightly greater than that of the spacer 40. Thus, the upper face 45 of the buffer, that is the one that is not in contact with the connection means 11, is presented protruding from the support surface 41 defined by the spacer 40.

La figure 5 représentant en coupe schématique le dispositif qui vient d'être décrit, une fois que le fond 24 est monté sur la carrure 23, permet de mieux comprendre la fonction du tampon 44. La structure générale représentée sur la figure 5 est similaire à celle représentée sur la figure 2, c'est pourquoi la description des éléments communs entre ces deux figures ne sera pas reprise pour la figure 5.The figure 5 schematic sectional representation of the device which has just been described, once the bottom 24 is mounted on the middle part 23, provides a better understanding of the function of the buffer 44. The general structure shown in FIG. figure 5 is similar to that shown on the figure 2 therefore the description of the common elements between these two figures will not be repeated for the figure 5 .

Dans ce mode de réalisation, on trouve, sous l'écran LCD 31, le PCB 39 portant des composants électroniques, dont le premier module électrique 32 soit ici des circuits électroniques de traitement des signaux reçus par l'antenne 22.In this embodiment, there is, under the LCD screen 31, the PCB 39 carrying electronic components, whose first electrical module 32 is here electronic circuits for processing the signals received by the antenna 22.

Un élément intermédiaire d'espacement 46 est disposé entre l'écran LCD 31 et le PCB 39 pour assurer une hauteur suffisante entre ces deux éléments et permettre l'agencement des composants, tel que le module 47 schématisé, sur le PCB 39 dans l'espace intermédiaire ainsi défini.An intermediate spacing element 46 is disposed between the LCD screen 31 and the PCB 39 to ensure a sufficient height between these two elements and to allow the arrangement of the components, such as the schematized module 47, on the PCB 39 in the intermediate space thus defined.

On note l'agencement de l'entretoise 40, disposée en appui sur le PCB 39 et calée transversalement par la carrure 23. Les moyens de connexion 11, introduits dans le boîtier 20 à travers l'ouverture 27 de la carrure, sont agencés entre l'élément d'espacement 46 et l'entretoise 40, de telle manière que les plages de contacts 43 sont disposées en regard des plots de contact 33 correspondants du PCB 39. Des pistes de conduction électrique (non représentées) sont en outre prévues sur le PCB 39 pour connecter électriquement les plots de contact 33 avec le premier module électrique 32.Note the arrangement of the spacer 40, placed in abutment on the PCB 39 and wedged transversely by the middle part 23. The connection means 11, introduced into the housing 20 through the opening 27 of the middle part, are arranged between the spacer element 46 and the spacer 40, so that the contact pads 43 are arranged facing the corresponding contact pads 33 of the PCB 39. Electric conduction tracks (not shown) are further provided on the PCB 39 for electrically connecting the contact pads 33 with the first electrical module 32.

Dans le dispositif portable représenté pour illustrer ce second mode de réalisation préféré, la source d'alimentation utilisée est une batterie 48 de grand diamètre. On constate que la batterie 48 est disposée directement avec sa première face contre le fond 24 du boîtier 20, tandis que sa seconde face est en appui sur l'entretoise 40.In the portable device shown to illustrate this second preferred embodiment, the power source used is a battery 48 of large diameter. It can be seen that the battery 48 is arranged directly with its first face against the bottom 24 of the housing 20, while its second face bears against the spacer 40.

Par conséquent, du fait que l'épaisseur du tampon 44 est supérieure à celle de l'entretoise 40, la seconde face de la batterie 48 est également en appui sur la face 45 du tampon, de manière à comprimer ce dernier et, à assurer le contact électrique entre les plages de contact 43 des moyens de connexion 11 et les plots de contact 33 du PCB 39.Therefore, because the thickness of the buffer 44 is greater than that of the spacer 40, the second face of the battery 48 is also supported on the face 45 of the buffer, so as to compress the latter and, to ensure the electrical contact between the contact pads 43 of the connection means 11 and the contact pads 33 of the PCB 39.

Ainsi, on peut résumer le montage du dispositif portable selon la présente invention de la manière suivante. Le brin 1 est mis en place dans la carrure 23, dans laquelle sont déjà montés un certain nombre de composants tel que l'écran LCD 31 par exemple. Par la même occasion, les moyens de connexion 11 de l'antenne 22 sont introduits à l'intérieur du boîtier 20. L'entretoise 40 est agencée dans la carrure 23, si ça n'était pas encore fait, puis le tampon 44 dans son logement 42. Le joint 25 puis le fond 24 sont montés sur la carrure 23, ce qui a pour conséquence d'établir la connexion électrique entre les plages de contact 43 des moyens de connexion 11 et les plots de contact 33 du PCB 39. Les vis de fixation (non représentées) du boîtier 20 sont mises en place au travers du fond 24 et du brin 1 jusque dans la carrure 23, comprimant ainsi le tampon 44 par l'intermédiaire de la batterie 48. Le tampon 44 étant alors comprimé contre le PCB 39, les moyens de connexion 11 ne peuvent plus être déconnectés des plots de contact 33 du PCB.Thus, the assembly of the portable device according to the present invention can be summarized as follows. The strand 1 is placed in the middle part 23, in which are already mounted a number of components such as the LCD screen 31 for example. At the same time, the connection means 11 of the antenna 22 are introduced inside the housing 20. The spacer 40 is arranged in the middle part 23, if it was not yet done, then the buffer 44 in its housing 42. The gasket 25 and the bottom 24 are mounted on the middle part 23, which has the effect of establishing the electrical connection between the contact pads 43 of the connection means 11 and the contact pads 33 of the PCB 39. The fixing screws (not shown) of the housing 20 are put in place through the bottom 24 and the strand 1 into the middle 23, thus compressing the buffer 44 via the battery 48. The buffer 44 being then compressed against the PCB 39, the connection means 11 can no longer be disconnected from the contact pads 33 of the PCB.

En ce qui concerne un éventuel remplacement du bracelet, ou tout au moins du brin 1, il suffit de desserrer les vis de fixation du boîtier 20, et de les retirer au moins des trous 7 du brin 1, pour soulager la compression du tampon 44 et permettre le retrait des moyens de connexion 11 depuis leur emplacement. De même, pour le remontage du brin 1, il est possible de se passer d'un démontage complet du boîtier 20 pour rétablir la connexion électrique entre les premier 22 et second 32 modules électriques. En effet, il est envisageable, grâce à la structure selon la présente invention, d'insérer le brin 1 dans l'ouverture 27 de la carrure 23 tout en faisant glisser l'extrémité 10 des moyens de connexion 11 jusqu'à leur emplacement. Dans ce but, on peut prévoir que l'élément intermédiaire d'espacement 46 présente, dans sa région périphérique située en regard de l'ouverture 27, un arrondi 49 pour faciliter le glissement des moyens de connexion 11.Regarding a possible replacement of the bracelet, or at least the strand 1, it is sufficient to loosen the fixing screws of the housing 20, and remove at least the holes 7 of the strand 1, to relieve the compression of the buffer 44 and allow removal of the connection means 11 from their location. Similarly, for the winding of the strand 1, it is possible to do without a complete disassembly of the housing 20 to restore the electrical connection between the first 22 and second 32 electrical modules. Indeed, it is conceivable, thanks to the structure according to the present invention, to insert the strand 1 in the opening 27 of the middle part 23 while sliding the end 10 of the connection means 11 to their location. For this purpose, it can be provided that the intermediate spacer element 46 has, in its peripheral region situated opposite the opening 27, a rounding 49 to facilitate the sliding of the connection means 11.

Bien entendu on peut prévoir, de manière alternative, que le PCB 39 et les plots de contact 33 soient situés sensiblement dans le même plan que l'ouverture 27, de telle manière que l'extrémité 10 des moyens de connexion 11 ne nécessite pas d'être courbée lors de son insertion en regard des plots de contact 33. Dans ce cas, on peut aisément se passer de l'arrondi 49 décrit ci-dessus.Of course it can be provided, alternatively, that the PCB 39 and the contact pads 33 are located substantially in the same plane as the opening 27, so that the end 10 of the connection means 11 does not require to be bent when it is inserted opposite the contact pads 33. In this case, it is easy to dispense with the rounding 49 described above.

Ainsi, on comprend que, grâce à sa structure, le dispositif portable selon la présente invention permet avantageusement d'établir une connexion électrique entre au moins deux modules électriques sans imposer la nécessité de prévoir une étape spécifique d'établissement de ladite connexion, tel qu'une étape de vissage ou de soudure, lors du montage du dispositif.Thus, it is understood that, thanks to its structure, the portable device according to the present invention advantageously makes it possible to establish an electrical connection between at least two electric modules without imposing the need to provide a specific step of establishing said connection, such as a screwing or welding step, when mounting the device.

Bien entendu, on comprend que les premier et second modes de réalisation qui viennent d'être décrits correspondent à des structures respectivement générale et particulière, exposées dans un but d'illustration non limitative.Of course, it will be understood that the first and second embodiments which have just been described correspond to respectively general and particular structures, exposed for purposes of non-limiting illustration.

On peut par exemple prévoir des circuits électroniques de production de signaux électriques envoyés vers le second module électrique, de telle manière que le dispositif portable selon la présente invention est également susceptible d'émettre des ondes radio via l'antenne 22.For example, it is possible to provide electronic circuits for producing electrical signals sent to the second electrical module, so that the portable device according to the present invention is also capable of transmitting radio waves via the antenna 22.

On comprendra que diverses modifications et/ou améliorations évidentes pour l'homme du métier peuvent être apportées aux modes de réalisation décrits dans la présente description sans sortir du cadre de l'invention défini par les revendications annexées.It will be understood that various modifications and / or improvements obvious to those skilled in the art can be made to the embodiments described in the present description without departing from the scope of the invention defined by the appended claims.

Claims (12)

  1. Portable electronic device including a case (20) in which there is arranged a first electric module (32) and a wristband (1) attached to said case (20), the case including a top portion (23) and a bottom portion (24) which cooperate with each other in order to assemble said case (20), a second electric module (13, 22) being associated with said wristband and electric connecting means (11) providing an electrical connection between said first and second electric modules (32, 13, 22) through an opening (27) made in the case (20), said first electric module (32) including at least one electric contact bump (33) capable of being connected to said electrical connecting means (11), characterized in that when the case (22) is assembled, an element made of elastic material inside the case establishes an electrical contact, via compression, between said connecting means (11) and said contact bump (33).
  2. Device according to claim 1, characterized in that it further includes securing means for holding said bottom (24) and top (23) portions together, the implementation of said securing means also being capable of maintaining said electrical contact between the connecting means (11) and said contact bump (33).
  3. Device according to any one of the preceding claims, characterized in that said case (20) includes means for positioning the angle and height of the first electric module (32), guaranteeing precise positioning of said contact bump (33) with respect to said opening (27), arranged on a first (23) of said portions of the case, additional means for positioning the height of the connecting means being arranged on the other (24) of said portions of the case (20).
  4. Device according to claim 1, characterized in that said element is a buffer (44) of substantially parallelepiped shape and whose face that will come into contact with said connecting means (11) has a surface area at least equal to the surface area of said contact bump (33).
  5. Device according to claim 1 or 4, characterized in that it includes an additional element (40) having positioning means with respect to the case and including a housing (42) for receiving said element (44) made of elastic material.
  6. Device according to claims 3 and 5, characterized in that said additional element (40) is a spacer for positioning notamment the height of said first electric module (32) with respect to the other of said portions of the case
  7. Device according to any one of the preceding claims, characterized in that it includes radio frequency type signal reception means (22), said first electric module (32) including electronic circuits for processing the electric signals received from said second electric module (13, 22), the latter including an antenna (22) capable of at least receiving radio frequency type signals, said connecting means (11) including in particular two electric conductors respectively connected to a first and a second end of said antenna, said first electric module (32) including at least two contact bumps (33) intended to be contacted by said connecting means (11).
  8. Device according to claims 6 and 7, characterized in that said first electric module (32) includes a printed circuit board (39) carrying said contact bumps (33) and said electronic circuits, said printed circuit board (39) having at least one region arranged in contact with said spacer (40).
  9. Device according to claim 7 or 8, characterized in that said second electric module (13, 22) further includes means for communicating with the external environment, said connecting means (11) including additional conductors for providing an electrical connection between said communication means and said first electric module (32).
  10. Device according to claim 9, characterized in that said communication means include a charging coil capable of inducing an electric current between its terminals by interacting with an external charger.
  11. Device according to any one of the preceding claims, characterized in that it includes first means (25) for ensuring water resistance between said bottom (24) and top (23) portions of said case (20) and in that said device further includes second means (8) made in a single piece with a constituent element (4) of said wristband (1) and ensuring the water resistance of said case (20) at said opening (27).
  12. Device according to claim 11, characterized in that said second means include a snug (8), made of moulded elastic material with a constituent element (4) of said wristband (1), having slightly greater dimensions than the dimensions of said opening (27) and capable of being deformed to engage by friction in said opening, said snug (8) including a central passage (9) for said electric connecting means (11).
EP02079509A 2002-10-28 2002-10-28 Portable electronic device with an electric connection inside the device case Expired - Lifetime EP1416582B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP02079509A EP1416582B1 (en) 2002-10-28 2002-10-28 Portable electronic device with an electric connection inside the device case
DE60227260T DE60227260D1 (en) 2002-10-28 2002-10-28 A portable electronic device having an electrical connection in the device housing
AT02079509T ATE399375T1 (en) 2002-10-28 2002-10-28 PORTABLE ELECTRONIC DEVICE HAVING AN ELECTRICAL CONNECTION IN THE DEVICE HOUSING
US10/693,893 US6854978B2 (en) 2002-10-28 2003-10-28 Portable electronic device including means for establishing an electrical connection inside a case of said device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02079509A EP1416582B1 (en) 2002-10-28 2002-10-28 Portable electronic device with an electric connection inside the device case

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EP1416582A1 EP1416582A1 (en) 2004-05-06
EP1416582B1 true EP1416582B1 (en) 2008-06-25

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EP (1) EP1416582B1 (en)
AT (1) ATE399375T1 (en)
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Also Published As

Publication number Publication date
EP1416582A1 (en) 2004-05-06
DE60227260D1 (en) 2008-08-07
ATE399375T1 (en) 2008-07-15
US20040084200A1 (en) 2004-05-06
US6854978B2 (en) 2005-02-15

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