EP2169479A1 - Time base device for a watch - Google Patents
Time base device for a watch Download PDFInfo
- Publication number
- EP2169479A1 EP2169479A1 EP08165408A EP08165408A EP2169479A1 EP 2169479 A1 EP2169479 A1 EP 2169479A1 EP 08165408 A EP08165408 A EP 08165408A EP 08165408 A EP08165408 A EP 08165408A EP 2169479 A1 EP2169479 A1 EP 2169479A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- time base
- base device
- housing
- oscillator
- connection terminals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010453 quartz Substances 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 229910001751 gemstone Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C10/00—Arrangements of electric power supplies in time pieces
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
- G04C3/008—Mounting, assembling of components
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
- G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
- G04F5/04—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses
- G04F5/06—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses using piezoelectric resonators
- G04F5/063—Constructional details
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G17/00—Structural details; Housings
Definitions
- the present invention relates to a time base device for a watch, in particular an electronic watch.
- the timebase device comprises at least one coil of an electric motor that can be used to drive analog display means, a module having at least one timebase oscillator circuit mounted in a module housing, and a power source.
- Such a time base device also includes a frequency divider for dividing the frequency of the oscillator and a control circuit of an electric motor connected to the frequency divider. Said electric motor is controlled by the control circuit for driving particular needles of a time display on a watch dial for example.
- Each element of the time base device is generally fixed on at least one printed circuit board, on which the electrical connections between the different electronic elements of the time base device are made.
- the printed circuit board, including said timebase device may also be connected to the watch movement.
- These different elements are also powered by a voltage source, such as a battery or accumulator, which can be mounted in a housing provided for this purpose, which is connected to the printed circuit board.
- a voltage source such as a battery or accumulator
- tuning fork crystal resonator associated with an oscillator to form a part of the timebase.
- Said tuning fork crystal resonator and the integrated circuit comprising the oscillator can be grouped together in one and the same housing.
- the main purpose of the invention is therefore to overcome the aforementioned drawbacks by providing a time base device for a watch, which is compact and easy to handle for mounting operations in a small watch case.
- the present invention relates to a time base device for a watch, which comprises the features of the independent claim 1.
- An advantage of the time base device lies in the fact that the electrical connection between the voltage source, which may be a battery, a battery or an accumulator, and the electronic module of time base, as well as the connection electrical connection between the motor coil and said electronic module are made without the use of a printed circuit board.
- Metallic flanges connect the positive and negative poles of the cell to two external module connection terminals, and two metal wires of a winding of the coil are directly connected to two other external connection terminals of the module.
- the electronic module advantageously comprises in the same housing an oscillator, such as a crystal oscillator, a frequency divider and a motor control circuit, only 4 or 5 electrical connection terminals are required on one side outside of the module housing.
- the oscillator, the frequency divider and the control circuit may constitute a single integrated circuit. This makes it possible to reduce the volume of all the elements of the time base device, that is to say to reduce the volume of the watch movement by bringing the motor closer to the stack.
- the figure 1 schematically represents various components of an electronic watch, which comprises a time base device according to the invention.
- This watch comprises a voltage source 8, for example a battery, a battery or an accumulator, for powering an electronic module 1 having a time base and control means of an electric motor 6.
- the electric motor is controlled to drive cogs not shown to rotate the analog display means, such as hands 9 for indicating the time for example.
- the time base device consists essentially of the voltage source 8, the electronic module 1, and at least one coil of an electric motor 6. These elements of the time base device are advantageously mechanically and electrically connected without the aid of a printed circuit board to form a compact set of small dimensions, as explained hereinafter with reference to the figure 2 .
- the electronic module 1 comprises in a housing, an oscillator 3, which may be an oscillator with a resonator 2, for example a piezoelectric resonator, such as a quartz resonator or a silicon resonator of the MEMS type connected to the terminals of the oscillator 3.
- electronic module 1 further comprises a frequency divider 4, whose input is connected to the output of the oscillator 3, to obtain the desired operating frequency for the watch so as to indicate the exact time.
- the output of the frequency divider 4 is connected to a control circuit 5 of an electric motor 6 for driving the hands 9.
- the oscillator 3 with the resonator 2, as well as the frequency divider 4 can be part of a time base oscillator circuit.
- Lavet type stepper motor also called bipolar, formed of a magnetized rotor, a stator with high magnetic permeability for looping the magnetic circuit and at least one coil.
- This coil has the function, when energized, of creating a magnetic field in the stator which is thus transformed into a magnet whose polarity depends on the direction of the current in the coil.
- the control circuit 5 of the motor 6 provides a current flowing in the coil.
- the motor is controlled by a succession of positive and negative pulses spaced from power failure.
- other types of engine such as a two-phase stepper motor to obtain a bidirectional motor for setting the time of the watch in the forward and backward directions. In the case of a two-phase motor, three motor outputs must be provided on the electronic module 1.
- the oscillator 3, the frequency divider 4 and the control circuit 5 of the electric motor are all part of a single integrated circuit 7. This saves the space occupied by these electronic elements in the electronic module 1, and to reduce the electromagnetic disturbances on these electronic elements, due in particular to the length of the wired connections between elements.
- said electronic module 1 comprises only four or five external connection terminals instead of eight terminals in normal time. Indeed, it is normally provided two connection terminals for the excitation of the resonator 2, two other terminals for the connection with the integrated circuit 7, two other terminals for the power supply of the integrated circuit and finally two terminals for the control of the motor .
- this electronic module 1 four terminals shown in the figures, or even five terminals, are required externally on the housing, namely the two power supply terminals of the integrated circuit and the two or three terminals of the integrated circuit for the control. of the motor.
- the other terminals are arranged only in the housing of the electronic module 1.
- the figure 2 represents a three-dimensional view of the timebase device of the present invention.
- This time base device therefore comprises a voltage source 8, which is preferably a battery or battery, an electronic module 1 and a coil 30 of an electric motor.
- the electronic module 1 comprises in a particular ceramic housing, the oscillator with the resonator, the frequency divider and the control circuit of the electric motor.
- the oscillator, the frequency divider and the control circuit can form a single integrated circuit, but of course it may be possible to make these elements on more than one integrated circuit if necessary.
- connection terminals 14, 15, 16 and 17 are provided on an outer face of the electronic module 1. These connection terminals, as explained with reference to FIGS. Figures 3 and 4 , are disposed on an outer face of a wall of the housing on the inner side of which are mounted the integrated circuit and conductive connection tracks connecting said integrated circuit to the resonator and to the connection terminals.
- the four connection terminals shown are preferably arranged respectively at the four angles of the outer face.
- These connection terminals on the outside face advantageously serve as a base for the connection of the other elements of the time base device. This makes it possible to simplify the assembly of the elements of the time-based device of the watch movement, and also to greatly reduce the volume of the assembly by reducing the number of components.
- This electronic module 1 can be housed in a receptacle 10 of generally parallelepipedal shape open on one or two sides.
- the receptacle 10 may be defined as all or part of a metal or plastic plate, or may be part of an integrated movement of the watch. In the example shown in figure 2 , the receptacle 10 is open on two sides.
- connection terminals 14 15, 16 and 17 are accessible from an open upper face of the receptacle.
- the outer face of the module 1, on which are placed the connection terminals 14, 15, 16 and 17, is disposed at the same level as the mouth of the open upper face of the receptacle 10, in particular at the upper edge vertical walls of the receptacle. This facilitates the mechanical and electrical connection of the other elements of the timebase device.
- Two first terminals 14 and 15 of the outer face of the module are provided to be connected respectively by two conventional metal flanges 24 and 25 to the two positive and negative poles of the voltage source 8, which is here preferably a battery.
- a first flange 24 is fixed or welded to one of the first metal connection terminals 14 to connect the positive pole of the battery, while the second flange 25, which surrounds an outer portion of the receptacle 10, is fixed or welded to the other first metal connection terminals 15 for connecting the negative pole of said stack.
- Two second connection terminals 16 and 17 of the outer face of the module which are arranged on a side opposite to the two first terminals 14 and 15, are in turn connected to a conventional winding of a coil 30. an electric motor.
- a first wire 31 of the coil 30 is soldered to one of the second metal connection terminals 16, while a second wire 32 of the coil 30 is soldered to the other of the second metal connection terminals 17.
- the core this coil 30 is a part of a magnetic circuit 33, which can be fixed, for example by screws through the two openings provided for this purpose, to another part of a magnetic circuit of the electric motor not shown.
- connection flanges 24 and 25 of the stack can be integrated into a housing for receiving the stack, not shown. This housing may be part of the receptacle 10 or be attached to a side wall of the receptacle.
- the figure 3 is a view in median and longitudinal section of the electronic module 1 of the time base device.
- the resonator 2 is fixed by welding or gluing with a conductive adhesive the connection pads of two groups of electrodes located on the base of the resonator with corresponding conductive pads 18 provided on steps This allows the positioning of the resonator 2 above the integrated circuit 7, which is arranged on an inner face of a bottom wall of the housing 11.
- connection between the connection pads located on the base of the resonator 2 and the integrated circuit 7 for effecting the excitation of the electrodes and ensuring the vibration of the resonator can be done via the conductive pads 18 connected to the holes 22.
- holes 22 are formed in the rungs 19 and filled with a suitable conductive material, and connected to the conductive tracks disposed on the inner face of the bottom wall of the housing. These conductive tracks are themselves connected to corresponding contact pads of the integrated circuit 7.
- the integrated circuit 7 may be connected to the outside of the housing at connection terminals 14, 15, 16 and 17, which are arranged on an outer face of the bottom wall of the housing as previously explained. To do this in this example, it is provided on the inner face of the bottom wall, connection pads 12 advantageously located under the integrated circuit 7. These pads or connection bumps 12 are arranged in the same arrangement as ranges of contact of the integrated circuit 7 to be able to electrically connected said contact pads of the integrated circuit by a technique called "flip chip" in English terminology. Some contact pads of the integrated circuit are thus electrically connected by conductive tracks to the external connection terminals 14, 15, 16 and 17, through holes 20 passing through the bottom wall of the housing 11, which are filled with a conductive glue 21 or any other suitable conductive material. These holes being located opposite the connection terminals 14, 15, 16 and 17, the conductive adhesive 21 provides the electrical connection with the inside of the housing.
- the figure 4 is a top view of the electronic module 1, without closure cover, of the time base device.
- the resonator is not shown in the housing, which can be made of ceramic material and of parallelepipedal general shape.
- the not shown lid which hermetically closes the housing, can be advantageously made of glass to allow precise laser adjustment of the frequency of the resonator.
- an integrated circuit 7 is fixed by means of its contact pads 13, seen in transparency, on the not shown connection pads, which are arranged on the inner face of the bottom wall. of the case. As indicated above, the connection pads have an equivalent arrangement to the contact pads 13 in order to fix said integrated circuit by the so-called "flip chip” technique.
- the integrated circuit 7 comprises the oscillator, the frequency divider and the control circuit of the electric motor.
- the electrodes of the resonator are welded to conductive pads 18, which are connected to holes 22. These holes 22 are formed in rungs 19 and filled with a suitable conductive material, such as a conductive glue or metal.
- a suitable conductive material such as a conductive glue or metal.
- the conductive pads 18 are connected to conductive tracks 23 disposed on the inner face of the bottom wall of the housing. These conductive tracks 23 connect on the one hand these conductive pads 18 to certain contact pads 13 of the integrated circuit 7, and on the other hand some other conductive pads 13 of the integrated circuit 7 to the external connection terminals 14, 15, 16 and 17 .
- the electrical connection of the integrated circuit 7 to the external connection terminals is made through holes 20 passing through the bottom wall of the housing 11. These holes 20 are filled with a conductive adhesive 21 or any other suitable conductive material. These holes being located opposite the connection terminals 14, 15, 16 and 17, the conductive adhesive 21 provides the electrical connection with the electronic elements in the housing.
- the first two external connection terminals 14 and 15 are connected to a voltage source, such as a battery, to enable the integrated circuit 7 to be powered.
- the second two external connection terminals 16 and 17 are themselves connected. winding a coil of an electric motor to provide positive and negative electrical pulses.
- the space occupied by all of these elements is optimized.
- protection of the integrated circuit or circuits 7 is ensured vis-à-vis any external disturbances and this also thanks to the relatively short connection tracks between the various elements.
- the compact form of time base device can be designed by those skilled in the art without departing from the scope of the invention defined by the claims. It can be provided the connection of several electric motors on the same terminals of the electronic module or on different connection terminals. The actuation time of each of the motors connected to the electronic module may be different.
- the electronic module can be connected to the voltage source and to the coil without being placed in a receptacle.
- the voltage source for the power supply of the electronic module may be composed in part of a solar cell in combination with a battery or accumulator.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electric Clocks (AREA)
- Electromechanical Clocks (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Abstract
Description
La présente invention concerne un dispositif base de temps pour une montre, notamment une montre électronique. Le dispositif base de temps comprend au moins une bobine d'un moteur électrique susceptible d'être utilisé pour entraîner des moyens d'affichage analogique, un module ayant au moins un circuit oscillateur de base de temps monté dans un boîtier du module, et une source d'alimentation électrique.The present invention relates to a time base device for a watch, in particular an electronic watch. The timebase device comprises at least one coil of an electric motor that can be used to drive analog display means, a module having at least one timebase oscillator circuit mounted in a module housing, and a power source.
Dans l'état de la technique, il est connu de réaliser un dispositif base de temps pour un mouvement horloger avec un oscillateur relié à un résonateur à quartz. Un tel dispositif base de temps comprend également un diviseur de fréquence pour diviser la fréquence de l'oscillateur et un circuit de commande d'un moteur électrique relié au diviseur de fréquence. Ledit moteur électrique est commandé par le circuit de commande pour l'entraînement notamment d'aiguilles d'un affichage horaire sur un cadran de montre par exemple.In the state of the art, it is known to produce a time-based device for a watch movement with an oscillator connected to a quartz resonator. Such a time base device also includes a frequency divider for dividing the frequency of the oscillator and a control circuit of an electric motor connected to the frequency divider. Said electric motor is controlled by the control circuit for driving particular needles of a time display on a watch dial for example.
Chaque élément du dispositif base de temps est généralement fixé sur au moins une plaque à circuit imprimé, sur laquelle sont réalisées les liaisons électriques entre les différents éléments électroniques du dispositif base de temps. La plaque à circuit imprimé, comprenant ledit dispositif base de temps, peut être relié également au mouvement de montre. Ces différents éléments sont également alimentés par une source de tension, telle qu'une batterie ou un accumulateur, qui peut être monté dans un logement prévu à cet effet, qui est relié à la plaque à circuit imprimé. L'assemblage de tous ces éléments électroniques du dispositif base de temps occupe ainsi un volume relativement important, ce qui constitue un inconvénient pour un montage ou une intégration dans une pièce d'horlogerie de petites dimensions.Each element of the time base device is generally fixed on at least one printed circuit board, on which the electrical connections between the different electronic elements of the time base device are made. The printed circuit board, including said timebase device, may also be connected to the watch movement. These different elements are also powered by a voltage source, such as a battery or accumulator, which can be mounted in a housing provided for this purpose, which is connected to the printed circuit board. The assembly of all these electronic elements of the time base device thus occupies a relatively large volume, which is a disadvantage for an assembly or integration into a timepiece of small dimensions.
Pour réduire le volume de l'ensemble des éléments électroniques du dispositif base de temps, il est déjà connu d'utiliser un résonateur à quartz en forme de diapason associé à un oscillateur pour former une partie de la base de temps. Ledit résonateur à quartz en forme de diapason et le circuit intégré comprenant l'oscillateur peuvent être regroupés dans un même boîtier.To reduce the volume of all the electronic elements of the timebase device, it is already known to use a tuning fork crystal resonator associated with an oscillator to form a part of the timebase. Said tuning fork crystal resonator and the integrated circuit comprising the oscillator can be grouped together in one and the same housing.
Le regroupement de divers composants électroniques dans un même boîtier est notamment connu du document de brevet
Bien que les solutions antérieures permettent de réduire en partie le volume occupé notamment par certains composants d'une base de temps, l'espace disponible reste cependant insuffisant pour réaliser une pièce d'horlogerie de petites dimensions. La nécessité de monter plusieurs circuits intégrés pour remplir plusieurs fonctions de la montre sur une ou plusieurs plaques à circuit imprimé entraîne une importante occupation de l'espace disponible dans la montre. Ceci nécessite d'augmenter le volume de cette dernière de manière excessive, ce qui n'est pas souhaitéAlthough the previous solutions can partly reduce the volume occupied by particular components of a time base, the available space remains insufficient to make a timepiece of small dimensions. The need to mount several integrated circuits to fulfill several functions of the watch on one or more printed circuit boards leads to a significant occupation of the space available in the watch. This requires increasing the volume of the latter excessively, which is not desired
L'invention a donc pour but principal de pallier aux inconvénients susmentionnés en fournissant un dispositif base de temps pour une montre, qui soit compact et facile à manipuler pour des opérations de montage dans une boîte de montre de petites dimensions.The main purpose of the invention is therefore to overcome the aforementioned drawbacks by providing a time base device for a watch, which is compact and easy to handle for mounting operations in a small watch case.
A cet effet, la présente invention concerne un dispositif base de temps pour une montre, qui comprend les caractéristiques de la revendication indépendante 1.To this end, the present invention relates to a time base device for a watch, which comprises the features of the
Des formes particulières de réalisation du dispositif base de temps sont définies dans les revendications dépendantes 2 à 11.Particular embodiments of the time base device are defined in
Un avantage du dispositif base de temps selon l'invention réside dans le fait que la connexion électrique entre la source de tension, qui peut être une pile, une batterie ou un accumulateur, et le module électronique de base de temps, ainsi que la connexion électrique entre la bobine d'un moteur et ledit module électronique sont réalisées sans l'utilisation d'une plaque à circuit imprimé. Des brides métalliques relient les pôles positif et négatif de la pile à deux bornes externes de connexion du module, et deux fils métalliques d'un enroulement de la bobine sont directement reliés à deux autres bornes externes de connexion du module. Dans le cas d'un moteur biphasé, il peut être avantageusement prévu trois fils métalliques de bobine reliés directement à trois bornes externes de connexion du module.An advantage of the time base device according to the invention lies in the fact that the electrical connection between the voltage source, which may be a battery, a battery or an accumulator, and the electronic module of time base, as well as the connection electrical connection between the motor coil and said electronic module are made without the use of a printed circuit board. Metallic flanges connect the positive and negative poles of the cell to two external module connection terminals, and two metal wires of a winding of the coil are directly connected to two other external connection terminals of the module. In the case of a two-phase motor, it can be advantageously provided three coil wires connected directly to three external connection terminals of the module.
Grâce au fait que le module électronique comprend avantageusement dans un même boîtier un oscillateur, tel qu'un oscillateur à quartz, un diviseur de fréquence et un circuit de commande du moteur, uniquement 4, voire 5 bornes de connexion électrique sont nécessaires sur une face extérieure du boîtier du module. L'oscillateur, le diviseur de fréquence et le circuit de commande peuvent constituer un seul circuit intégré. Ceci permet de réduire le volume de l'ensemble des éléments du dispositif base de temps, c'est-à-dire de réduire le volume du mouvement horloger en rapprochant le moteur de la pile.Due to the fact that the electronic module advantageously comprises in the same housing an oscillator, such as a crystal oscillator, a frequency divider and a motor control circuit, only 4 or 5 electrical connection terminals are required on one side outside of the module housing. The oscillator, the frequency divider and the control circuit may constitute a single integrated circuit. This makes it possible to reduce the volume of all the elements of the time base device, that is to say to reduce the volume of the watch movement by bringing the motor closer to the stack.
En regroupant dans un espace réduit les divers éléments du dispositif base de temps, cela réduit également la longueur des connexions entre les éléments électroniques du dispositif, et aussi la sensibilité de l'oscillateur aux perturbations externes. Ceci permet également de supprimer plusieurs opérations mécaniques d'assemblage des composants électroniques, ce qui réduit les coûts de production du mouvement muni du dispositif base de temps selon l'invention.By grouping the various elements of the time base device in a small space, this also reduces the length of the connections between the electronic elements of the device, and also the sensitivity of the oscillator to external disturbances. This also makes it possible to eliminate several mechanical assembly operations of the electronic components, which reduces the production costs of the movement provided with the time base device according to the invention.
Les buts, avantages et caractéristiques du dispositif base de temps pour une montre apparaîtront mieux dans la description suivante de manière non limitative en regard des dessins sur lesquels :
- la
figure 1 représente une vue schématique d'une montre électronique avec affichage analogique, qui comprend le dispositif base de temps selon l'invention; - la
figure 2 représente une vue tridimensionnelle des divers éléments du dispositif base de temps selon l'invention; - la
figure 3 représente une vue partielle en coupe longitudinale du module électronique du dispositif base de temps selon l'invention; et - la
figure 4 est une vue partielle de dessus du module électronique du dispositif base de temps selon l'invention.
- the
figure 1 represents a schematic view of an electronic watch with an analogue display, which comprises the time base device according to the invention; - the
figure 2 represents a three-dimensional view of the various elements of the time base device according to the invention; - the
figure 3 represents a partial view in longitudinal section of the electronic module of the time base device according to the invention; and - the
figure 4 is a partial view from above of the electronic module of the time base device according to the invention.
Dans la description suivante, tous les éléments du dispositif base de temps d'une montre électronique qui sont bien connus de l'homme du métier dans ce domaine technique ne sont relatés que de manière simplifiée.In the following description, all elements of the timebase device of an electronic watch which are well known to those skilled in the art are only described in a simplified manner.
La
Le dispositif base de temps est constitué essentiellement de la source de tension 8, du module électronique 1, et d'au moins une bobine d'un moteur électrique 6. Ces éléments du dispositif base de temps sont avantageusement reliés mécaniquement et électriquement sans l'aide d'une plaque à circuit imprimé pour former un ensemble compact de petites dimensions, comme expliqué ci-après en référence à la
Le module électronique 1 comprend dans un boîtier, un oscillateur 3, qui peut être un oscillateur avec un résonateur 2 par exemple piézoélectrique, comme un résonateur à quartz ou encore un résonateur en silicium du type MEMS connecté aux bornes de l'oscillateur 3. Le module électronique 1 comprend encore un diviseur de fréquence 4, dont l'entrée est reliée à la sortie de l'oscillateur 3, pour obtenir la fréquence de marche souhaitée pour la montre de manière à indiquer l'heure exacte. La sortie du diviseur de fréquence 4 est connectée à un circuit de commande 5 d'un moteur électrique 6 pour l'entraînement des aiguilles 9. L'oscillateur 3 avec le résonateur 2, ainsi que le diviseur de fréquence 4 peuvent faire partie d'un circuit oscillateur de base de temps.The
Il peut être utilisé comme moteur électrique 6, un moteur pas à pas de type Lavet, encore appelé bipolaire, formé d'un rotor aimanté, un stator à haute perméabilité magnétique pour réaliser le bouclage du circuit magnétique et d'au moins une bobine. Cette bobine a pour fonction, lorsqu'elle est mise sous tension, de créer un champ magnétique dans le stator qui se transforme ainsi en aimant dont la polarité dépend du sens du courant dans la bobine. Ainsi le circuit de commande 5 du moteur 6 fournit un courant qui circule dans la bobine. Le moteur est commandé par une succession d'impulsions positives et négatives espacées de coupure de courant. Toutefois, il peut être utilisé d'autres types de moteur, comme par exemple un moteur pas à pas biphasé pour obtenir un moteur bidirectionnel permettant une mise à l'heure de la montre dans les sens avant et arrière. Dans le cas d'un moteur biphasé, il doit être prévu trois sorties moteur sur le module électronique 1.It can be used as an
Avantageusement, comme cela est représenté sur la
Comme représenté sur les
La
Le module électronique 1 comprend dans un boîtier notamment en céramique, l'oscillateur avec le résonateur, le diviseur de fréquence et le circuit de commande du moteur électrique. Comme expliqué ci-dessus, l'oscillateur, le diviseur de fréquence et le circuit de commande peuvent former un unique circuit intégré, mais bien entendu, il peut être envisageable de réaliser ces éléments sur plus d'un circuit intégré en cas de nécessité.The
Sur une face extérieure du module électronique 1, il est prévu quatre bornes de connexion 14, 15, 16 et 17. Ces bornes de connexion, comme expliqué en référence aux
Ce module électronique 1 peut être logé dans un réceptacle 10 de forme générale parallélépipédique ouvert sur une ou deux faces. Le réceptacle 10 peut être défini comme tout ou partie d'une platine métallique ou plastique, ou peut faire partie d'un mouvement intégré de la montre. Dans l'exemple représenté à la
Une fois que le module électronique 1 est fixé par exemple par collage dans le réceptacle, ses quatre, voire cinq bornes de connexion sont accessibles depuis une face supérieure ouverte du réceptacle. De préférence, la face extérieure du module 1, sur laquelle sont placées les bornes de connexion 14, 15, 16 et 17, est disposée au même niveau que l'embouchure de la face supérieure ouverte du réceptacle 10, notamment au niveau du bord supérieur des parois verticales du réceptacle. Ceci permet de faciliter la connexion mécanique et électrique des autres éléments du dispositif base de temps.Once the
Deux premières bornes de connexion 14 et 15 de la face extérieure du module sont prévues pour être reliées respectivement par deux brides métalliques classiques 24 et 25 aux deux pôles positif et négatif de la source de tension 8, qui est ici de préférence une pile. Une première bride 24 est fixée ou soudée sur une des premières bornes de connexion métallique 14 pour relier le pôle positif de la pile, alors que la seconde bride 25, qui entoure une partie extérieure du réceptacle 10, est fixée ou soudée sur l'autre des premières bornes de connexion métallique 15 pour relier le pôle négatif de ladite pile.Two
Deux secondes bornes de connexion 16 et 17 de la face extérieure du module, qui sont disposées sur un côté opposé aux deux premières bornes 14 et 15, sont quant à elles reliées à un enroulement traditionnel d'une bobine 30 d'un moteur électrique. Un premier fil métallique 31 de la bobine 30 est soudé à une des secondes bornes de connexion métallique 16, alors qu'un second fil métallique 32 de la bobine 30 est soudé à l'autre des secondes bornes de connexion métallique 17. Le noyau de cette bobine 30 est une partie d'un circuit magnétique 33, qui peut être fixé, par exemple par des vis à travers les deux ouvertures prévues à cet effet, à une autre partie d'un circuit magnétique du moteur électrique non représenté.Two
Il peut être également envisageable d'utiliser le réceptacle 10 du module électronique 1 comme support de la bobine 30 du moteur avec éventuellement tout son mécanisme. Cette bobine peut aussi être directement fixée au bord d'une face latérale ouverte du réceptacle 10. Les brides de connexion 24 et 25 de la pile peuvent être intégrées dans un logement de réception de la pile, non représenté. Ce logement peut faire partie du réceptacle 10 ou être fixé à une paroi latérale du réceptacle.It may also be possible to use the
L'agencement de tous les éléments à l'intérieur du boîtier par exemple en matériau céramique du module électronique 1 est expliqué maintenant en référence aux
La
La connexion entre les plages de connexion situées sur la base du résonateur 2 et le circuit intégré 7 pour effectuer l'excitation des électrodes et assurer la vibration du résonateur peut se faire par l'intermédiaire des plages conductrices 18 reliées à des trous 22. Ces trous 22 sont formés dans les échelons 19 et remplis d'un matériau conducteur approprié, et connectés aux pistes conductrices disposées sur la face intérieure de la paroi de fond du boîtier. Ces pistes conductrices sont reliées elles-mêmes à des plages de contact correspondantes du circuit intégré 7.The connection between the connection pads located on the base of the
Le circuit intégré 7 peut être connecté vers l'extérieur du boîtier à des bornes de connexion 14, 15, 16 et 17, qui sont disposées sur une face extérieure de la paroi de fond du boîtier comme expliqué auparavant. Pour ce faire dans cet exemple, il est prévu sur la face intérieure de la paroi de fond, des plots de connexion 12 avantageusement situés sous le circuit intégré 7. Ces plots ou bosses de connexion 12 sont disposés selon un même arrangement que des plages de contact du circuit intégré 7 afin de pouvoir connecté électriquement lesdites plages de contact du circuit intégré par une technique dénommée "flip chip" en terminologie anglaise. Certaines plages de contact du circuit intégré sont donc reliées électriquement par des pistes conductrices aux bornes de connexion externes 14, 15, 16 et 17, par l'intermédiaire de trous 20 traversant la paroi de fond du boîtier 11, qui sont remplis d'une colle conductrice 21 ou de tout autre matériau conducteur approprié. Ces trous étant situés en regard des bornes de connexion 14, 15, 16 et 17, la colle conductrice 21 assure la connexion électrique avec l'intérieur du boîtier.The
La
Dans le boîtier 11 du module électronique 1, un circuit intégré 7 est fixé par l'intermédiaire de ses plages de contact 13, vues en transparence, sur les plots de connexion non représentés, qui sont disposés sur la face intérieure de la paroi de fond du boîtier. Comme indiqué précédemment, les plots de connexion ont un agencement équivalent aux plages de contact 13 afin de pouvoir fixer ledit circuit intégré par la technique dénommée "flip chip". Le circuit intégré 7 comprend l'oscillateur, le diviseur de fréquence et le circuit de commande du moteur électrique.In the
Les électrodes du résonateur non représenté sont soudées sur des plages conductrices 18, qui sont reliées à des trous 22. Ces trous 22 sont formés dans des échelons 19 et remplis d'un matériau conducteur approprié, tel qu'une colle conductrice ou du métal. Ainsi les plages conductrices 18 sont reliées à des pistes conductrices 23 disposées sur la face intérieure de la paroi de fond du boîtier. Ces pistes conductrices 23 relient d'une part ces plages conductrices 18 à certaines plages de contact 13 du circuit intégré 7, et d'autre part certaines autres plages conductrices 13 du circuit intégré 7 aux bornes de connexion externes 14, 15, 16 et 17.The electrodes of the resonator, not shown, are welded to
La connexion électrique du circuit intégré 7 aux bornes de connexion externes est réalisée par l'intermédiaire de trous 20 traversant la paroi de fond du boîtier 11. Ces trous 20 sont remplis d'une colle conductrice 21 ou de tout autre matériau conducteur approprié. Ces trous étant situés en regard des bornes de connexion 14, 15, 16 et 17, la colle conductrice 21 assure la connexion électrique avec les éléments électroniques dans le boîtier. Les deux premières bornes de connexion externes 14 et 15, sont connectées à une source de tension, telle qu'une pile, pour permettre d'alimenter le circuit intégré 7. Les deux secondes bornes de connexion externes 16 et 17 sont quant à elles connectées à un enroulement d'une bobine d'un moteur électrique pour lui fournir des impulsions électriques positives et négatives.The electrical connection of the
Grâce à l'agencement du circuit intégré 7 relié au résonateur à l'intérieur du boîtier, l'espace, occupé par l'ensemble de ces éléments, est optimisé. De plus, une protection du ou des circuits intégrés 7 est assurée vis-à-vis d'éventuelles perturbations externes et ceci grâce également aux pistes de connexion relativement courtes entre les divers éléments.Thanks to the arrangement of the
A partir de la description qui vient d'être faite, plusieurs variantes de réalisation du dispositif base de temps de forme compacte peuvent être conçues par l'homme du métier sans sortir du cadre de l'invention définie par les revendications. Il peut être prévu la connexion de plusieurs moteurs électriques sur les mêmes bornes de connexion du module électronique ou sur des bornes de connexion différentes. La temporisation d'actionnement de chacun des moteurs reliés au module électronique peut être différente. Le module électronique peut être relié à la source de tension et à la bobine sans être disposé dans un réceptacle. La source de tension pour l'alimentation électrique du module électronique peut être composée en partie par une cellule solaire en combinaison à une pile ou à un accumulateur.From the description that has just been given, several embodiments of the compact form of time base device can be designed by those skilled in the art without departing from the scope of the invention defined by the claims. It can be provided the connection of several electric motors on the same terminals of the electronic module or on different connection terminals. The actuation time of each of the motors connected to the electronic module may be different. The electronic module can be connected to the voltage source and to the coil without being placed in a receptacle. The voltage source for the power supply of the electronic module may be composed in part of a solar cell in combination with a battery or accumulator.
Claims (11)
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08165408A EP2169479B1 (en) | 2008-09-29 | 2008-09-29 | Time base device for a watch |
AT08165408T ATE535844T1 (en) | 2008-09-29 | 2008-09-29 | TIME BASE UNIT FOR A WRISTWATCH |
SG200905970-0A SG160286A1 (en) | 2008-09-29 | 2009-09-08 | Time base device for a watch |
TW098131217A TW201017351A (en) | 2008-09-29 | 2009-09-16 | Time base device for a watch |
US12/563,675 US8259537B2 (en) | 2008-09-29 | 2009-09-21 | Time base device for a watch |
JP2009222248A JP5475382B2 (en) | 2008-09-29 | 2009-09-28 | Time reference device for clock |
CN2009101780512A CN101713958B (en) | 2008-09-29 | 2009-09-28 | Time base device for a watch |
KR1020090092113A KR101190319B1 (en) | 2008-09-29 | 2009-09-29 | Time base device for a watch |
HK10110409.2A HK1143867A1 (en) | 2008-09-29 | 2010-11-08 | A time base device for a watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08165408A EP2169479B1 (en) | 2008-09-29 | 2008-09-29 | Time base device for a watch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2169479A1 true EP2169479A1 (en) | 2010-03-31 |
EP2169479B1 EP2169479B1 (en) | 2011-11-30 |
Family
ID=40119407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08165408A Active EP2169479B1 (en) | 2008-09-29 | 2008-09-29 | Time base device for a watch |
Country Status (9)
Country | Link |
---|---|
US (1) | US8259537B2 (en) |
EP (1) | EP2169479B1 (en) |
JP (1) | JP5475382B2 (en) |
KR (1) | KR101190319B1 (en) |
CN (1) | CN101713958B (en) |
AT (1) | ATE535844T1 (en) |
HK (1) | HK1143867A1 (en) |
SG (1) | SG160286A1 (en) |
TW (1) | TW201017351A (en) |
Cited By (3)
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EP2605079A1 (en) * | 2011-12-13 | 2013-06-19 | ETA SA Manufacture Horlogère Suisse | Modular clock movement with functional modules |
WO2014095538A1 (en) * | 2012-12-21 | 2014-06-26 | Eta Sa Manufacture Horlogère Suisse | Thermocompensated timepiece circuit |
EP2784605A1 (en) * | 2013-03-27 | 2014-10-01 | ETA SA Manufacture Horlogère Suisse | Thermocompensated chronometer circuit |
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JP5939852B2 (en) * | 2012-03-22 | 2016-06-22 | エスアイアイ・セミコンダクタ株式会社 | Analog electronic clock |
TWI494718B (en) * | 2013-12-26 | 2015-08-01 | Princo Corp | Wristwatch structure and electronic core for wristwatch |
EP3054359A1 (en) * | 2015-02-05 | 2016-08-10 | ETA SA Manufacture Horlogère Suisse | Device for mounting an electric power source |
CN106647222A (en) * | 2017-02-28 | 2017-05-10 | 广西天睿精工精密电子有限公司 | Movement part of quartz watch |
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EP1890204A1 (en) * | 2006-08-16 | 2008-02-20 | ETA SA Manufacture Horlogère Suisse | Resonator mounted in a case incorporating a clock module |
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2008
- 2008-09-29 AT AT08165408T patent/ATE535844T1/en active
- 2008-09-29 EP EP08165408A patent/EP2169479B1/en active Active
-
2009
- 2009-09-08 SG SG200905970-0A patent/SG160286A1/en unknown
- 2009-09-16 TW TW098131217A patent/TW201017351A/en unknown
- 2009-09-21 US US12/563,675 patent/US8259537B2/en active Active
- 2009-09-28 JP JP2009222248A patent/JP5475382B2/en active Active
- 2009-09-28 CN CN2009101780512A patent/CN101713958B/en active Active
- 2009-09-29 KR KR1020090092113A patent/KR101190319B1/en not_active IP Right Cessation
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2010
- 2010-11-08 HK HK10110409.2A patent/HK1143867A1/en unknown
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US3784725A (en) | 1972-07-24 | 1974-01-08 | Solitron Devices | Electronic hybrid package |
FR2283478A1 (en) * | 1974-08-30 | 1976-03-26 | Ebauches Sa | ELECTRONIC CIRCUIT FOR WATCH |
EP1581917A2 (en) * | 2002-12-17 | 2005-10-05 | Robert F Reynolds | System and method for attention training |
EP1890204A1 (en) * | 2006-08-16 | 2008-02-20 | ETA SA Manufacture Horlogère Suisse | Resonator mounted in a case incorporating a clock module |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2605079A1 (en) * | 2011-12-13 | 2013-06-19 | ETA SA Manufacture Horlogère Suisse | Modular clock movement with functional modules |
KR101435724B1 (en) | 2011-12-13 | 2014-09-01 | 에타 쏘시에떼 아노님 마누팍투레 홀로게레 스위세 | Modular timepiece movement with functional modules |
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WO2014095538A1 (en) * | 2012-12-21 | 2014-06-26 | Eta Sa Manufacture Horlogère Suisse | Thermocompensated timepiece circuit |
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EP2784605A1 (en) * | 2013-03-27 | 2014-10-01 | ETA SA Manufacture Horlogère Suisse | Thermocompensated chronometer circuit |
Also Published As
Publication number | Publication date |
---|---|
CN101713958A (en) | 2010-05-26 |
KR20100036207A (en) | 2010-04-07 |
TW201017351A (en) | 2010-05-01 |
KR101190319B1 (en) | 2012-10-11 |
JP5475382B2 (en) | 2014-04-16 |
JP2010085406A (en) | 2010-04-15 |
HK1143867A1 (en) | 2011-01-14 |
ATE535844T1 (en) | 2011-12-15 |
US8259537B2 (en) | 2012-09-04 |
CN101713958B (en) | 2013-09-11 |
US20100080088A1 (en) | 2010-04-01 |
SG160286A1 (en) | 2010-04-29 |
EP2169479B1 (en) | 2011-11-30 |
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