CH714508A2 - Device for charging an electronic or electromechanical watch and a set comprising it. - Google Patents

Abstract

The present invention relates to a device (4) for charging an electronic or electromechanical watch (2) equipped on the one hand with an electrical energy storage means for feeding the electronic components of the watch, and on on the other hand, a source of additional electric power capable of supplying the electrical energy storage means for recharging it. The device comprises a box (16) provided with a support (30) for receiving the watch. The device further comprises at least one energy source (18) configured to provide power to the backup power source, when the watch is placed on the receiving medium, so that the source of power backup electric power converts the received energy into electrical energy and delivers to the electric power storage means a load for maintaining a predetermined level of supply voltage.

Description

Description

TECHNICAL FIELD OF THE INVENTION The invention relates to a device for recharging an electronic or electromechanical watch, in particular an electronic or electromechanical watch case capable of recharging such a watch.

The invention also relates to an assembly comprising the recharging device and an electronic or electromechanical watch, equipped on the one hand with an electrical energy storage means for supplying the electronic components of the watch, and d on the other hand from an additional source of electrical energy capable of supplying the electrical energy storage means for recharging.

STATE OF THE ART [0003] A mechanical watch can be either manual winding or automatic winding. The advantage of automatic winding for a mechanical watch is that the watch is wound automatically via an oscillating weight, when worn on a person's wrist. So the watch never stops, if it is worn regularly. As long as the watch is worn, it does not stop due to the daily movements of the person. In this field of mechanical watches, devices are known, called winders, which make it possible to keep a mechanical watch with automatic winding in motion, even when it is not worn. Such winders, which are for example in the form of cases, typically include vibrating means connected to a motor to impart a slow rotation to the watch, and thus recharge the spring of the watch barrel via the oscillating mass. Such winders thus prevent the watch from stopping, and allow it to keep a constant range of motion and therefore stay on time. Patent application WO 2012/126978 A1 describes, for example, such a watch winder for a mechanical watch. However, a drawback of such mechanical watch winders is that they do not allow an electronic or electromechanical watch equipped with a means of storing electric energy to be recharged autonomously. Such an electronic or electromechanical watch is typically a solar watch or even a thermal or thermoelectric watch.

In the case of a solar watch, solar energy is typically transformed into electrical energy by means of a photovoltaic cell acting as an additional source of electrical energy for the watch. The photovoltaic cell is connected to a battery for storing electrical energy, the latter driving the movement of the watch. When the watch is stored in a place without light, such as a drawer or a trunk for example, the battery can no longer charge and the watch stops after the battery is drained. In order to avoid a complete discharge of the watch, a known solution consists in storing the watch in a lighted place when it is not worn. However, such a solution is unreliable and relatively restrictive, since such lighted places are not always available.

In the case of a thermal or thermoelectric watch provided for example with a thermoelectric generator, the watch operates thanks to the body heat losses of the person wearing the watch. The thermoelectric generator, acting as an additional source of electrical energy, converts these heat losses into electrical energy to power the battery. The energy stored in the battery keeps the watch running for a while. However, when the watch is not worn, the battery discharges, which can lead to a complete discharge of the battery after a certain time and therefore stop the movement of the watch.

SUMMARY OF THE INVENTION The purpose of the invention is therefore to provide a device for recharging an electronic or electromechanical watch equipped with a rechargeable electric energy storage means, making it possible to automatically recharge the storage means d electrical energy of the watch, easily and without constraint, and overcoming the aforementioned drawbacks of the prior art.

To this end, the invention relates to a device for recharging an electronic or electromechanical watch equipped on the one hand with an electrical energy storage means for supplying the electronic components of the watch, and d on the other hand, an additional source of electrical energy capable of supplying the electrical energy storage means for recharging it, which comprises the characteristics mentioned in independent claim 1.

Particular forms of the recharging device are defined in dependent claims 2 to 12.

An advantage of the charging device according to the invention lies in the fact that the device comprises at least one energy source configured to supply energy to the auxiliary electrical energy source, when the watch is placed on the receiving support. The auxiliary electrical energy source thus converts the energy received into electrical energy and delivers, by means of electrical energy storage, a charge for maintaining a predetermined level of supply voltage. This allows the electric energy storage means of the watch to be recharged automatically, when the watch is not being worn, in an easy and non-restrictive manner. The recharging device according to the invention advantageously makes it possible to avoid a complete discharge of the watch, and therefore a loss of time and / or date resulting therefrom.

CH 714 508 A2 Another advantage of the charging device according to the invention is that it does not require any galvanic contact between the watch and the device in order to charge the watch. The electric charging of the watch is then carried out in a particularly easy manner.

According to a first embodiment of the invention, said at least one energy source is a light source, the device being a device for recharging a solar watch, the auxiliary electric power source of the watch being able to convert light energy into electrical energy.

Advantageously, the recharging device comprises means for optimizing the light spectrum of the light source, as a function of at least one predetermined characteristic of the auxiliary electrical energy source of the watch. This makes it possible to adapt the light spectrum of the light source to the performance of the watch's auxiliary electrical energy source, allowing optimal recharging of the watch with minimum consumption of the recharging device. In addition, the light spectrum can omit the infrared part which can heat the watch, and over time, degrade it, as well as the recharging device.

According to a second embodiment of the invention, said at least one energy source is a thermal source configured to apply a temperature gradient inside the device, the device being a device for recharging a thermal or thermoelectric watch, the auxiliary source of electrical energy of the watch being capable of converting thermal energy into electrical energy.

Advantageously, the recharging device comprises means for optimizing the thermal gradient inside the device, as a function of at least one predetermined characteristic of the watch and / or of the auxiliary electrical energy source. of the watch. This makes it possible to adapt the thermal gradient applied inside the device to the construction of the watch and / or to the performance of the auxiliary electric power source of the watch, allowing optimal recharging of the watch with a minimum consumption of the recharging device.

Advantageously, the recharging device comprises a flap part mounted on the box, and a watch presence sensor and / or closing the flap part; said sensor being connected to the energy source, the energy source being configured to trigger an energy emission intended for the auxiliary electrical energy source of the watch on the basis of a detection signal received of the sensor. This fully automates the process of recharging the watch, from the moment the watch is placed on the receiving support and / or the flap piece is closed.

Advantageously, the electronic or electromechanical watch further comprises an energy extractor connecting the auxiliary electrical energy source to the electrical energy storage means, the energy source being configured to supply energy. to the additional electrical energy source, when the watch is placed on the receiving support, so that said additional electrical energy source converts the energy received into electrical energy via the extractor d 'energy. This facilitates the extraction of energy from the energy source and its conversion into electrical charges in order to accumulate these charges on the electrical energy storage means of the watch.

To this end, the invention also relates to an assembly comprising the recharging device described above, and which comprises the characteristics mentioned in dependent claim 13.

BRIEF DESCRIPTION OF THE FIGURES The aims, advantages and characteristics of the device for recharging an electronic or electromechanical watch, as well as of the assembly comprising it, will appear better in the following description on the basis of at least one form d '' nonlimiting execution illustrated by the drawings on which:

fig. 1 is a perspective view of an assembly comprising an electronic or electromechanical watch and a recharging device according to the invention, the recharging device being in the form of a case, FIG. 2 shows a simplified block diagram of the electronic components of the watch and of the recharging device of FIG. 1 according to an exemplary embodiment, FIG. 3 is a perspective view of a device for recharging a solar watch, according to a first embodiment of the invention, and FIG. 4 is a vertical sectional view of a part of a device for recharging a thermal or thermoelectric watch, according to a second embodiment of the invention.

DETAILED DESCRIPTION OF THE INVENTION In the following description, reference is made to a device for recharging an electronic or electromechanical watch, in particular a case for an electronic or electromechanical watch. All the electronic components of the recharging device, which are well known to a person skilled in the art in this technical field, are only described from

CH 714 508 A2 simplified manner. In particular, a person skilled in the art will know how to adapt these different electronic components and make them cooperate for the operation of the device.

Figs. 1 and 2 represent a set 1, which includes an electronic or electromechanical watch 2 and a device 4 for recharging the watch 2. The electronic or electromechanical watch 2 is provided with a watch box 5. The watch box 5 comprises a middle 6. The watch case 5 contains a clockwork movement (not shown) of usual construction, as well as a dial 7 above which display means move, for example formed by hands 8. The dial 7 is protected by a crystal 9, which closes the watch case 5. Conventionally, the watch case 5 also contains electronic components 10 requiring an electrical supply, as well as an electrical energy storage means 11 for the supply of the electronic components 10 of the watch 2. The watch 2 further comprises a backup electrical energy source 12 capable of supplying the electrical energy storage means 11 for recharging. The auxiliary electric power source 12 can be arranged inside the watch case 5 or, as a variant, be placed outside of the latter, for example on the glass 9 or the middle part 6 or the watch strap. Preferably, as illustrated in FIG. 2, watch 2 also includes an energy extractor 14 connecting the auxiliary electrical energy source 12 by means of electrical energy storage 11. Watch 2 is for example a quartz watch or a hybrid mechanical watch, without this being limiting in the context of the present invention.

The recharging device 4 comprises a box 16. In the illustrative example of FIG. 1, the recharging device 4 is a case for receiving the watch 2. However, this is in no way limiting in the context of the present invention, and the recharging device 4 can alternatively adopt any other form having a box , different from a case.

As illustrated in FIG. 2, the recharging device 4 further comprises at least one energy source 18. In the example embodiment illustrated in FIG. 1, the recharging device 4 further comprises a flap part 20, mounted on the box 16. In the case where the recharging device 4 is a case for receiving the watch 2, the flap part 20 is typically a cover closing the case. According to a preferred embodiment illustrated in FIG. 2, the recharging device 4 also comprises a sensor 22 for the presence of the watch 2 and / or for closing the flap part 20. Preferably, the recharging device 4 may further comprise means 24 for analyzing data , communication means 26, and electrical supply means 28.

Preferably, the recharging device 4 is configured to contain a type and / or a form of electronic or electromechanical watch 2 predefined (es). To do this, the box 16 includes a support 30 for receiving the watch 2, adapted to the type and / or the shape of the watch 2.

As will be detailed later, the energy source 18 is configured to supply energy to the auxiliary electric power source 12 when the watch 2 is placed on the receiving support 30, so that the auxiliary electrical energy source 12 converts the energy received into electrical energy and delivers by means of electrical energy storage 11 a charge for maintaining a predetermined level of supply voltage. This conversion of electrical energy can for example be facilitated by the energy extractor 14. The energy extractor 14, which comprises for example an oscillator circuit of the LC type, a clock signal generator such as a crystal oscillator, and one or more switches associated with a common control circuit, thus facilitates the extraction of electric charges from the auxiliary electric power source 12, and allows the accumulation of these charges on the storage means of electrical energy of the watch 2. As shown in FIG. 2, the electrical energy storage means 11 is for example an electrical capacitor. Alternatively, the electrical energy storage means 11 is a battery.

The sensor 22 for the presence of the watch 2 and / or for closing the flap part 20 is connected to the data analysis means 24, themselves connected to the energy source 18. The sensor 22 of presence of the watch 2 and / or closure of the flap part 20 is for example fixed in the recharging device 4, inside or outside of the reception support 30. The sensor 22 for the presence of the watch is for example a probe arranged in the recharging device 4 so as to be facing the side of the bottom 32 of the watch case 5, when the watch 2 is placed on the receiving support 30, facing this bottom 32. In a variant not shown, the presence sensor for watch 2 and / or for closing the flap piece 20 consists of an optical system for detecting the position of the hands 8 of watch 2, such as an optical sensor or a camera for example. The data analysis means 24 are for example configured to trigger an energy emission process intended for the auxiliary electrical energy source of watch 2 on the basis of a detection signal received from the sensor 22, as will be detailed later.

As shown in FIG. 2, the data analysis means 24 are also connected to the communication means 26 and to the power supply means 28. The data analysis means 24 for example consist of a microprocessor. The microprocessor stores in particular a time reference.

As illustrated in FIG. 2, the communication means 26 comprise for example a micro-USB socket (from the English Universal Serial Bus) 34 and a communication interface 36. The micro-USB socket 34 is connected to the power supply means 28 and is intended to allow electric recharging of the latter, via an external electric power source compatible with the USB format. The communication interface 36 is for example a touch screen, allowing a user to enter useful information, in particular information relating to the type or model of watch 2. Such information, once communicated to the means 24 of data analysis, then allow access to predetermined characteristics of the auxiliary electric power source 12 of the watch

CH 714 508 A2

2, in particular characteristics of thermal or light power, or light spectrum. This is for example made possible via a correspondence table stored in the analysis means 24.

The power supply means 28 comprise for example a charger / accumulator assembly, in particular in the case where the communication means 26 comprise a micro-USB socket 34. As a variant, the power supply means 28 comprise a battery , rechargeable or not. In another variant, the electrical supply of the recharging device 4 is supplied via a connection of the device 4 to the domestic electrical network, the electrical supply means 28 comprising for example in this case a charger / accumulator assembly. According to these last two variants, the communication means 26 do not include a micro-USB socket 34.

The data analysis means 24, the communication means 26, and the power supply means 28 are for example all connected to a common printed circuit, such a printed circuit not being shown in the figures for reasons of clarity.

A first embodiment of the invention will now be described with reference to FIG. 3. According to this first embodiment, the energy source 18 is a light source and the device 4 is a device for recharging a solar watch 2. In such a solar watch 2, the source of electrical energy d 'extra 12 is able to convert light energy into electrical energy. The auxiliary electrical energy source 12 is for example a photovoltaic cell, for example arranged on the dial 7 of the watch 2.

The light source 18 comprises for example at least one light-emitting diode 38. In the embodiment illustrated in FIG. 3, the light source 18 comprises several light-emitting diodes 38 arranged in rows inside the flap piece 20. More specifically, the light-emitting diodes 38 are fixed inside the flap piece 20 so as to be in view of the auxiliary electric power source 12 of watch 2 when the flap part 20 is closed on the box 16 and when watch 2 is placed on the receiving support 30. The light source 18 is for example activatable by the data analysis means 24, and is configured to be able to be activated permanently or, alternatively, at regular programmable intervals.

Preferably, according to this first embodiment of the invention, the recharging device 4 further comprises means for optimizing the light spectrum of the light source 18, according to at least one predetermined characteristic of the auxiliary electric power source 12 of the watch 2. The means for optimizing the light spectrum consist for example of data analysis means 24, which can store a table of correspondence between information of types or of watch models and predetermined light characteristics of auxiliary electrical energy sources 12. Depending on the type and / or model of watch 2 placed on the reception support 30, the data analysis means 24 are then configured to control and adjust the light spectrum of the light source 18, in order to optimize this light spectrum and to adapt it to the light characteristics of the light source d backup electrical energy 12 of the watch 2. This makes it possible to optimize and precisely adjust the quantity of energy supplied by the device 4, in order to prolong the life of the electrical energy storage means 11 of the shows 22, as well as that consumed by the recharging device.

A second embodiment of the invention will now be described with reference to FIG. 4. According to this second embodiment, the energy source 18 is a thermal source and the device 4 is a device for recharging a thermal or thermoelectric watch 2. In such a thermal or thermoelectric watch 2, the source of auxiliary electrical energy 12 is capable of converting thermal energy into electrical energy. The auxiliary electrical energy source 12 is for example a thermoelectric generator. Such a thermoelectric generator is a semiconductor device, for example a semiconductor device implementing a P-N junction. Such a P-N junction is for example made up of bismuth tellurium (Bi2Te3) elements. Semiconductor thermoelectric generators are configured to convert a heat flux (in the form of a temperature differential) directly into electrical energy via a phenomenon called the Seebeck effect (a form of thermoelectric effect). Such thermoelectric generators work like heat engines, but are less bulky and have no moving parts. In the illustrative example of fig. 4, the thermoelectric generator 12 is arranged inside the watch case 5, between the dial 7 and the bottom 32 of the watch case 5.

The heat source 18 is configured to apply a temperature gradient inside the recharging device 4.

According to a first variant of the second embodiment, illustrated in FIG. 4, the thermal source 18 is a heat source that can be activated by the data analysis means 24. The thermal source 18 is configured to apply, when activated, temperature cycles, and therefore thermal gradients, inside the device 4. Preferably, the thermal source 18 is capable of being activated at regular programmable intervals. In this first variant embodiment illustrated in FIG. 4, the thermal source 18 comprises for example a heating element 40, an electrical source 42 connected in series with the heating element 40, and a fitting 44 in contact with the bottom 32 of the watch case 5. The heating element 40 consists for example of a resistive heating body or a coil resistance. The heating element 40 can be replaced by a cooling element without modifying the operation of this alternative embodiment. The electric source 42 is for example a source of electric voltage. The fitting 44, which belongs to the receiving support 30, is arranged facing the heating element 40 and is made of a metallic material. The metallic material is for example aluminum. In this variant embodiment illustrated in FIG.

CH 714 508 A2

4, the bottom 32 of the watch case 5 is made of a heat conducting material, preferably a metallic material. The bottom 32 is separated from the rest of the watch case 5 by an annular zone 46 made of a thermal insulating material.

According to a second variant of the second embodiment, not shown in the figures, the recharging device 4 comprises two sources of thermal energy 18. A first thermal source 18 comprises a heating element arranged in the box 16 so as to be in contact with the bottom 32 of the watch case 5 when the watch 2 is placed on the receiving support 30. A second energy source 18 comprises a cooling element arranged in the device 4 so as to be in contact with the middle 6 of watch 2 when watch 2 is placed on the receiving support 30. In this way, the two thermal sources 18 apply a constant thermal gradient inside the device 4. The heating element is for example constituted by '' a resistive heating body or a coil resistance. The cooling element is for example an active cooling element, such as a Peltier element or even a fan. As a variant, the cooling element is a passive cooling element such as for example an aluminum radiator in contact with the middle part 6 of watch 2.

Depending on the type and / or model of watch 2 as well as the type of thermoelectric generator 12 used, the thermal gradient between the middle part 6 of watch 2 and the bottom 32 of watch case 5 is preferably located in a range between 0.1 ° C and 10 ° C. The temperature measurement is for example carried out by means of two thermometers, a first thermometer being in contact with the hot part, that is to say the bottom 32 of watch 2; a second thermometer being in contact with the cold part, that is to say the middle 6 of the watch 2. The two thermometers are for example thermocouples. A simple closed loop system of the PID (Proportional Integral Derivative) type is then used to regulate the thermal gradient inside the device 4.

Preferably, according to this second embodiment of the invention, the recharging device 4 also comprises means for optimizing the thermal gradient inside the device 4, as a function of at least one predetermined characteristic. of watch 2 and / or of the auxiliary electrical energy source 12 of watch 2. The means for optimizing the thermal gradient consist for example of data analysis means 24, which can store a table of correspondence between information of types or models of watches and predetermined thermal characteristics of auxiliary electrical energy sources 12. Depending on the type and / or model of watch 2 placed on the reception support 30, the means 24 of data analysis are then configured to control and adjust the thermal gradient emitted by the thermal source 18, in order to optimize this thermal gradient and to adapt it to the thermal characteristics of the auxiliary electric power source 12 of the watch 2. This makes it possible to optimize and precisely adjust the amount of energy supplied by the device 4, in order to prolong the life of the storage means of electrical energy 11 from watch 22 with a minimum consumption of the recharging device.

The operation of the recharging device 4 according to the invention will now be described. The watch 2 is initially placed in the box 16 of the recharging device 4, on the reception support 30.

The watch 2 charging process, implemented by the device 4, can be triggered either manually by a user, or automatically.

The method may include an initial step during which a user of the device 4 enters, via the communication interface 36, information relating to the type or model of the watch 2. As a variant, the watch 2 is equipped a chip, for example an NFC (Near Field Communication) type chip, storing information relating to the auxiliary electrical energy source 12 of watch 2, in particular light or thermal characteristics. The device 4 is then configured to read such information within the chip, when the watch 2 is placed on the reception support 30.

In the case of a manual triggering of the process by a user, the latter, after having closed the flap part 20, for example presses a button for triggering the process.

In the case where the recharging device 4 comprises a sensor 22 for the presence of the watch 2 and / or for closing the flap part 20, the charging process is triggered automatically, following detection of the sensor 22. The sensor 22 then transmits a detection signal to the analysis means 24, which triggers the process for recharging the watch 2.

In both cases, the energy source (s) 18, controlled by the analysis means 24, trigger (s) an energy emission intended for the electric energy source backup 12 of watch 2. Preferably, the analysis means 24 access, for example via a correspondence table, predetermined characteristics of the auxiliary electric power source 12 of watch 2, in particular characteristics of thermal or light power, or light spectrum. The analysis means 24 can then optimize and precisely adjust the amount of energy supplied by the energy source or sources 18 as a function of the type of auxiliary electrical energy source 12 used. The auxiliary electrical energy source 12 then converts the energy received into electrical energy and delivers by means of electrical energy storage 11 a charge for maintaining a predetermined level of supply voltage, allowing the recharging of the shows 22 with a minimum consumption of the recharging device.

Claims (13)

claims 1. Device (4) for recharging an electronic or electromechanical watch (2) equipped on the one hand with an electrical energy storage means (11) for supplying the electronic components (10) of the watch ( 2), and on the other hand an auxiliary electrical energy source (12) capable of supplying the electrical energy storage means (11) for its recharging, the device (4) comprising a box (16 ) provided with a support (30) for receiving the watch (2), characterized in that the device (4) further comprises at least one energy source (18) configured to supply energy to the source additional electrical energy (12), when the watch (2) is placed on the receiving support (30), so that said additional electrical energy source (12) converts the energy received into electrical energy and delivers by means of electrical energy storage (11) a charge for maintaining a predetermined level supply voltage. 2. Charging device (4) according to claim 1, characterized in that said at least one energy source (18) is a light source, the device (4) being a device for recharging a solar watch, the auxiliary electrical energy source (12) of the watch (2) being able to convert light energy into electrical energy. 3. Charging device (4) according to claim 2, characterized in that it comprises a flap part (20) mounted on the box (16), and in that the light source (18) comprises at least one light emitting diode (38), the light emitting diode (38) being fixed inside the flap piece (20) so as to be opposite the auxiliary electric power source (12) of the watch (2 ), when the flap part (20) is closed on the box (16) and the watch (2) is placed on the receiving support (30). 4. Charging device (4) according to one of claims 2 and 3, characterized in that it comprises means (24) for optimizing the light spectrum of the light source (18), depending on at minus a predetermined characteristic of the auxiliary electrical energy source (12) of the watch (2). 5. Charging device (4) according to claim 1, characterized in that said at least one energy source (18) is a thermal source configured to apply a temperature gradient between two defined parts of the watch inside of the device (4), the device (4) being a device for recharging a thermal or thermoelectric watch, the auxiliary electrical energy source (12) of the watch (2) being able to convert energy thermal into electrical energy. 6. Charging device (4) according to claim 5, characterized in that the thermal source (18) is an activatable thermal source, configured to apply, when activated, temperature cycles to the watch inside the device (4). 7. Charging device (4) according to claim 6, characterized in that the thermal source (18) is capable of being activated at regular programmable intervals. 8. Charging device (4) according to claim 5, characterized in that it comprises two sources of thermal energy (18), a first thermal source (18) comprising a heating element arranged in the box so as to be in contact with a bottom (32) of the case (5) of the watch (2), when the watch (2) is placed on the receiving support (30); a second energy source (18) comprising a cooling element arranged in the device (4) so as to be in contact with a middle part (6) of the watch (2), when the watch (2) is placed on the support reception (30). 9. Charging device (4) according to one of claims 5 to 8, characterized in that it comprises means (24) for optimizing the thermal gradient inside the device (4), depending on at least one predetermined characteristic of the watch (2) and / or of the auxiliary electrical energy source (12) of the watch (2). 10. Charging device (4) according to any one of the preceding claims, characterized in that it comprises a flap part (20) mounted on the box (16), and a sensor (22) for the presence of the watch. (2) and / or closing the flap piece (20); said sensor (22) being connected to the energy source (18), the energy source (18) being configured to trigger an energy emission intended for the auxiliary electric energy source (12) of the watch (2) on the basis of a detection signal received from the sensor (22). 11. Charging device (4) according to any one of the preceding claims, characterized in that the device (4) is a case for receiving the watch (2). 12. Charging device (4) according to any one of the preceding claims, characterized in that the electronic or electromechanical watch (2) further comprises an energy extractor (14) connecting the auxiliary electrical energy source (12) by means of electrical energy storage (11), the energy source (18) being configured to supply energy to the auxiliary electrical energy source (12), when the watch (2 ) is placed on the receiving support (30), so that said auxiliary electrical energy source (12) converts the energy received into electrical energy via the energy extractor (14). 13. Assembly (1) comprising an electronic or electromechanical watch (2), equipped on the one hand with an electrical energy storage means (11) for supplying the electronic components (10) of the watch (2) , and on the other hand an auxiliary electrical energy source (12) capable of supplying the electrical energy storage means (11) for its recharging, the assembly (1) further comprising a device ( 4) for recharging the watch (2), characterized in that the recharging device (4) is in accordance with any one of the preceding claims.