专利摘要:
The invention relates to a watch (1) comprising a watch case provided with a middle part, the middle part carrying an element (4) provided with at least one index and defining an internal cavity (8). According to the invention the watch (1) further comprises at least one pair of electrodes (10a, 10b) and at least one light source device (12) connected to the pair of electrodes (10a, 10b) and arranged facing the index, the electrodes (10a, 10b) of the pair of electrodes being fixed in the inner cavity (8), the element (4) being permeable to water so that when the watch ( 1) is immersed in the seawater (15), seawater (15) can penetrate into the inner cavity (8), so that the pair of electrodes (10a, 10b) and the sea water (15) form an electrochemical cell for supplying said light source device (12).
公开号:CH715017A2
申请号:CH6432018
申请日:2018-05-23
公开日:2019-11-29
发明作者:Tortora Pierpasquale;Stalder Michael;Reinauer Olga
申请人:Swatch Group Res & Dev Ltd;
IPC主号:
专利说明:

Description
TECHNICAL FIELD OF THE INVENTION The invention relates to a watch comprising a watch case provided with a middle part, the middle part carrying an element provided with at least one illuminable index.
The watch is configured to be able to be immersed in sea water, such as for example a diving watch.
STATE OF THE ART In the field of watches comprising a watch case provided with a middle part, it is known to provide on the middle part an element provided with at least one luminous index. In the case of a diving watch, the element is for example a rotating bezel, and the index makes it possible for example to indicate a reference position for the measurement, by the diver, of his immersion time at sea. To do this, the diver turns the bezel so as to align the index finger with the minute hand. This position then becomes the reference for measuring the elapsed time. One of the main efficiency criteria of a diving watch must be the legibility of the time and the index during the immersion phase.
In order to meet this constraint, a known solution consists in covering the index of the bezel, as well as the hands of the watch, with a phosphorescent material. This makes the index and hands visible in low light conditions, typically a few meters underwater. Such a diving watch is for example described in patent application FR 1 572 837 A. However, a drawback of this solution is that it requires the phosphorescent elements to be charged beforehand in the sunlight or from a source of artificial light, so that the latter can then emit, for a period limited to a few hours and decreasingly (type of phosphorus, quantity, duration and intensity of the charge before diving), light in a dark environment for example under the 'water.
It is also known wristwatches comprising a dial provided with several luminous indexes, allowing the reading of information located on the dial in the dark as well as in broad daylight.
Such a wristwatch is for example described in patent application WO 2016 146 350 A1. The wristwatch includes a watch box, a rotating bezel mounted on the watch box and a dial provided with several luminous indexes. The luminous indexes are illuminated through the dial by a light source placed under the dial and powered by a source of electrical energy such as a rechargeable battery or accumulator. A light source activation component is housed in the rotating bezel and cooperates with a detection component housed in the watch case. Thus, the user can control the ignition of the light source by rotating the rotating bezel and bringing it to a predetermined position in which the presence of the activation component is detected by the detection component which, in response , controls the ignition of the light source; the bezel acts there like a switch. However, when the electric power source runs out, it is necessary to replace the latter or to manually recharge it, which is restricting for the user.
SUMMARY OF THE INVENTION The invention therefore aims to provide a watch making it possible to illuminate the index finger in low light conditions, especially underwater, while being easy to use, and requiring neither prior charging of phosphorescent elements or manual replacement or recharging of an electrical energy source.
To this end, the invention relates to a watch which includes the features mentioned in independent claim 1.
Particular forms of the watch are defined in dependent claims 2 to 20.
An advantage of such a watch according to the invention lies in the use of a pair of electrodes fixed in an interior cavity of the element and of a light source device connected to the pair of electrodes and arranged opposite the index. The element is permeable to water so that when the watch is immersed in sea water, sea water can enter the interior cavity. The pair of electrodes and the seawater thus form an electrochemical cell. In this way, when the watch is submerged, seawater enters the volume between the electrodes, allowing the battery thus formed to start up and power the light source device. This provides a particularly simple solution for lighting the index in low light conditions underwater, without the need to manually replace or recharge an electrical power source. In addition, the index illuminates and remains lit as soon as the watch is submerged, without the user having to press any buttons or particular commands. According to a preferred embodiment of the invention, the element is an annular bezel rotatably mounted around the middle, the bezel defining an interior cavity opening out of the watch case. The pair of electrodes and the light source device are preferably integral with the annular bezel, so that they can rotate around the middle at the same time as the bezel.
CH 715 017 A2 Advantageously, the watch also comprises a mechanical element for separating the two electrodes from the pair of electrodes. This will prevent physical contact between the electrodes.
Advantageously, the watch comprises several pairs of electrodes of opposite polarities, the pairs of electrodes being connected together in series. This allows, for example when the light source device comprises at least one light-emitting diode, to more easily reach the threshold voltage of the latter in order to be able to switch it on.
According to a particular technical characteristic of the invention, the light source device comprises at least one light-emitting diode.
Advantageously, the light-emitting diode is coated in a protective resin capable of electrically isolating the light-emitting diode from water. This protects and electrically isolates the light-emitting diode from water.
Advantageously also, the light-emitting diode is arranged in the interior cavity of the element, under the index. This particular configuration makes it possible to effectively illuminate the index when the watch is immersed in seawater.
According to a particular technical characteristic of the invention, the index is formed by an opening formed in the element, said opening being provided with a window capable of letting the light pass. Preferably, the window is made of sapphire.
Advantageously, at least one of the free surfaces of the sapphire is frosted. This makes it possible to better diffuse the light emitted by the light source device and to increase the angle of view of the illuminated index.
According to a particular embodiment of the invention, the electrodes of the pair of electrodes are chosen so that the pair of electrodes and the sea water form an electrochemical cell of the Leclanché type. This particular embodiment has the advantage of obtaining improved electrical power for the electrochemical cell.
According to another particular embodiment of the invention, the electrodes of the pair of electrodes are chosen so that the pair of electrodes and the seawater form an electrochemical cell of the metal / air type. This particular embodiment has the advantage of obtaining a high energy density for the electrochemical cell.
Advantageously, an anode of the pair of electrodes is made of a metallic material chosen from the group consisting of aluminum, zinc and magnesium. Such materials have the advantage of being very energetic. Thus, if the cell dries quickly and becomes inactive between two successive immersions, the corrosion of the anode will not have time to significantly affect the galvanic performance of the cell.
Advantageously, an interior wall of the interior cavity is coated with a layer of a water-soluble salt. This has the advantage that you can also use the watch in a freshwater environment. In fact, the salt, combined with the fresh water in which it is dissolved, then forms an electrochemical cell with the pair of electrodes.
Advantageously, the watch further comprises an external actuator and an additional light source device arranged in the watch case opposite a watch face, the external actuator and the additional light source device being connected to the pair of electrodes. This makes it possible, by making contact with the electrodes via the actuation of the external actuator, to also supply the additional light source device, and thus to illuminate, in addition to the index, the dial and the hands of the shows.
BRIEF DESCRIPTION OF THE FIGURES The objects, advantages and characteristics of the watch according to the invention will appear better in the following description on the basis of at least one non-limiting embodiment illustrated by the drawings in which:
fig. 1 is a top view of a watch according to a preferred embodiment of the invention, the watch comprising an annular bezel provided with an index;
fig. 2 is a schematic view of the interior of the watch in FIG. 1, the watch comprising a light-emitting diode and two cells in series, each comprising a pair of electrodes;
fig. 3 is a schematic representation of the watch of FIG. 2;
fig. 4 is a sectional view, taken along a section plane IV-IV, of the watch of FIG. 2 according to a first alternative embodiment, in an off state of the light-emitting diode;
fig. 5 is a view similar to that of FIG. 4, in an on state of the light-emitting diode; and fig. 6 is a sectional view, taken along a sectional plane VI-VI, of the watch of FIG. 2 according to a second alternative embodiment.
CH 715 017 A2
DETAILED DESCRIPTION OF THE INVENTION [0025] FIG. 1 shows a watch 1 provided with a watch case 2. The watch case 2 comprises a middle part, such a middle part not being shown in the figures for reasons of clarity. The middle part carries an element 4. The element 4 is provided with at least one index finger 6 and defines an interior cavity 8, such an interior cavity 8 being visible in FIGS. 2 and 4 to 6. In the preferred embodiment illustrated in FIGS. 1 to 6, element 4 is an annular rotating bezel rotatably mounted around the middle. In the illustrative example of fig. 1, watch 1 is a diving watch and the rotating bezel 4 has a single index 6. Index 6 is a lightable index and makes it possible to constitute a reference position for example for the measurement, by the diver, of his time d immersion in water. However, the present invention is not limited to a diving watch comprising an annular rotating bezel, but more generally applies to any watch comprising a middle part carrying an element provided with at least one index and defining an interior cavity or any timepiece component having a cavity associated with such an index.
The index 6 is for example formed by an opening in the element 4. The opening is preferably closed by a closing element or window capable of letting the light pass. Preferably, the window is made of sapphire. More preferably, at least one of the free surfaces of the window, in this case sapphire, is frosted.
As shown in Figs. 2 and 3, the watch 1 further comprises at least one pair of electrodes 10a, 10b and at least one light source device 12 connected to the pair of electrodes 10a, 10b. In the illustrative example of Figs. 2 and 3, watch 1 comprises two pairs of electrodes 10a, 10b and a single light source device 12. Preferably, watch 1 further comprises a mechanical element 14 for separating the two electrodes 10a, 10b from each pair electrode. Such a mechanical element 14 is visible in FIGS. 4 to 6.
More preferably, the watch 1 can also comprise, according to a variant, an external actuator and an additional light source device; such elements are not visible in the figures for reasons of clarity. The external actuator is for example formed by a push button. The additional light source device is for example arranged in the watch case 2 opposite a watch dial. The external actuator and the additional light source device are connected to the pair of electrodes 10a, 10b.
The element 4 is arranged on the watch case so that water can be introduced into the interior cavity 8 and is therefore permeable to water. To do this, the interior cavity 8 opens to the exterior through at least one orifice, for example, as illustrated in FIGS. 4 to 6 the element 4 is arranged on the middle of the watch case 2 so as to define an opening towards the outside, which opening is in fluid communication with the internal cavity 8. In the illustrative example of FIG. 1 where the element 4 is an annular rotating bezel, the rotating bezel 4 is for example clipped onto the middle part by covering the latter, and by defining, for example with the middle part, a substantially circular opening, in fluid communication with the internal cavity 8. The opening is in this case located between the inner outer periphery of the bezel 4 and the outer rim of the middle part.
Alternatively, the inner cavity 8 is connected to the outside of the telescope by an orifice 8a formed in a wall of the telescope and through which a liquid can easily be introduced. Preferably the internal cavity 8 is connected to the outside by at least two orifices which allow a circulation of liquid in said cavity.
The electrodes 10a, 10b are fixed in the interior cavity 8. In this way, and since the element 4 is permeable to water, sea water can penetrate into the interior cavity 8 when the watch 1 is immersed in sea water, and thus come into contact with the electrodes 10a, 10b. The pair (s) of electrodes 10a, 10b and the seawater then form an electrochemical cell intended to supply the light source device 12 electrically, as will be described in more detail below. Rich in salt and ions, seawater indeed acts as an electrolyte which activates a redox reaction at the electrodes. The electrodes 10a, 10b are held mechanically in the internal cavity 8 so as never to come into contact with each other or with the surface of the rotating bezel 4.
In the illustrative example of Figs. 2 and 3 according to which the watch 1 comprises two pairs of electrodes 10a, 10b, each pair of electrodes comprises an electrode 10a of positive polarity, also called cathode; and an electrode 10b of negative polarity, also called an anode. Each pair of electrodes 10a, 10b forms a current-generating cell 18, the two cells 18 being connected together in series, as illustrated in FIG. 2 as well as on the equivalent circuit of FIG. 3. More specifically, the anode 10b of a first pair of electrodes is connected to the cathode 10a of a second pair of electrodes. The cathode 10a of the first pair of electrodes and the anode 10b of the second pair of electrodes are connected to respective terminals of the light source device 12. As shown in FIG. 2, the electrodes 10a, 10b are cut in the shape of the rotating bezel 4. In a variant not shown, the number of pairs of electrodes 10a, 10b connected together in series can be chosen to be greater than or equal to three.
According to a first alternative embodiment illustrated in FIGS. 4 and 5, the two electrodes 10a, 10b of each pair of electrodes each have a plane geometry and extend parallel to one another, opposite one another in the internal cavity 8. According to this first variant embodiment, the mechanical element 14 for separating the two electrodes 10a, 10b is for example formed of a fabric membrane. The fabric membrane is for example arranged between the two electrodes 10a, 10b of each pair of electrodes. When watch 1 is immersed in sea water 15, the volume between the electrodes 10a, 10b is filled with sea water 15. The electrochemical cell formed by the electrodes 10a, 10b and sea water 15 then in operation via an oxidation-reduction reaction occurring between the electrodes 10a, 10b
CH 715 017 A2 and sea water 15. The light source device 12 then passes from an extinct state, shown in FIG. 4, in an on state, shown in FIG. 5.
According to a second alternative embodiment illustrated in FIG. 6, the two electrodes 10a, 10b of each pair of electrodes each have a cylindrical geometry. The two electrodes 10a, 10b of each pair of electrodes are arranged concentrically in the interior cavity 8. For example the cathode 10a of each pair of electrodes, formed of a metal sheet, surrounds the anode 10b of this same pair of electrodes. In a variant not shown, the anode 10b of each pair of electrodes can surround the cathode 10a of this same pair of electrodes. According to this second alternative embodiment, the mechanical element 14 for separating the two electrodes 10a, 10b is for example formed of an ion-permeable membrane. The ion-permeable membrane is for example arranged between the two electrodes 10a, 10b of each pair of electrodes, and thus ensures the spacing between the two electrodes 10a, 10b. The operation of watch 1 according to this second variant embodiment is similar to that of (a watch 1 according to the first variant embodiment, sea water filling the volume between the two concentric electrodes 10a, 10b.
Preferably, an inner wall of the inner cavity 8 is coated with a layer of a water-soluble salt, such a layer of salt not being shown in the figures for reasons of clarity. This also makes it possible to use the watch according to the invention in a fresh water environment.
The light source device 12 is arranged facing the index 6, thus allowing the lighting of the index 6. Preferably, as shown in FIGS. 2, and 4 to 6, the light source device 12 is integral with the rotating bezel 4. More preferably, the light source device 12 comprises at least one light-emitting diode 16. In the illustrative example of FIGS. 2 to 6, the light source device 12 comprises a single light-emitting diode 16. The light source device 12 can also comprise a resistor connected in series with the light-emitting diode 16. Such a resistor, not shown in the figures, is intended to limit the current flowing within the light-emitting diode 16 and thus protect the latter.
This guarantees a constant current in the circuit of the light-emitting diode 16.
The light emitting diode 16 is preferably coated in a protective resin capable of electrically isolating the light emitting diode 16 from water. Such a protective resin is not shown in the figures for reasons of clarity. The light-emitting diode 16 is for example arranged in the interior cavity 8 of the element 4, under the index 6 so as to be able to illuminate the latter. The threshold voltage of the light-emitting diode is for example between 2.6 V and 3 V.
Several specific embodiments will now be described for the electrodes 10a, 10b.
According to a first particular embodiment, one of the electrodes of the pair of electrodes 10a, 10b is a zinc electrode, and the other electrode of the pair of electrodes 10a, 10b is a copper electrode. According to this particular embodiment, the sea water is reduced to produce hydrogen. The redox reaction which takes place between the electrodes 10a, 10b and the sea water generates an ion current in the volume of water penetrated into the cavity 8 of the telescope 4, as well as a transport of electric charges corresponding to the current required to supply the light source device 12. The battery thus formed according to this first particular embodiment typically exhibits an open circuit voltage of the order of 0.5 V.
According to a second particular embodiment, the electrodes 10a, 10b of the pair of electrodes are chosen so that the pair of electrodes 10a, 10b and the seawater form an electrochemical cell of the Leclanché type . According to this particular embodiment, seawater only plays the role of electrolyte. The cathode 10a of the pair of electrodes comprises for example a manganese oxide deposited on a metal sheet. The battery thus formed according to this second particular embodiment typically has an open circuit voltage of the order of 1.5 V; and produces a current for example of the order of 10 mA / g of manganese oxide.
According to a third particular embodiment, the electrodes 10a, 10b of the pair of electrodes are chosen so that the pair of electrodes 10a, 10b and the seawater form an electrochemical cell of metal type /air. According to this particular embodiment, the oxygen dissolved in the sea water is reduced. The anode 10b of the pair of electrodes is for example made of a metallic material. The metallic material is preferably aluminum. As a variant, the metallic material can also be zinc, or alternatively magnesium. The cell thus formed according to this third particular embodiment typically has an open circuit voltage of the order of 1.5 V. In this third particular embodiment, it is necessary to ensure good convection of the water of sea within the watch to renew the oxygen consumed, which can be done by optimizing the number and shape of the openings in contact with the outside of the bezel.
The previous description of the watch according to the invention was made with reference to an element provided with a single index and defining a single interior cavity; and with reference to a single light source device. However, the person skilled in the art will understand that the invention applies in the same way to watches comprising a plurality of indices, interior cavities, pairs of electrodes and light source devices each associated respectively with a index.
CH 715 017 A2 It will further be noted that the light source device according to the invention is energetically autonomous so that it can be fitted to a watch comprising a mechanical movement as well as a watch comprising an electronic or hybrid movement .
Finally, the use of an LED as a preferred light source for signaling the diving index advantageously makes it possible to choose the color thereof, because the range of colors of the LEDs covers a wide palette unlike phosphorescent materials which are always orange, green or light blue. A person who usually dives in blue water will be better off choosing a yellow LED in order to have maximum contrast. Similarly, a person who usually dives in greenish water can advantageously choose a red LED.
权利要求:
Claims (23)
[1]
claims
1. Watch (1) comprising a watch case (2) provided with a middle part, the middle part carrying an element (4) provided with at least one index (6) and defining an interior cavity (8);
characterized in that the watch (1) further comprises at least one pair of electrodes (10a, 10b) and at least one light source device (12) connected to the pair of electrodes (10a, 10b) and arranged facing the index (6), the electrodes (10a, 10b) of the pair of electrodes being fixed in the interior cavity (8), the element (4) being permeable to water so that, when the watch (1) is immersed in sea water (15), sea water (15) can penetrate into the interior cavity (8), so that the pair of electrodes (10a, 10b ) and seawater (15) form an electrochemical cell, for supplying said light source device (12).
[2]
2. Watch (1) according to claim 1, characterized in that the element (4) is an annular bezel rotatably mounted around the middle, the bezel (4) defining an inner cavity (8) opening to the outside of the watch case (2).
[3]
3. Watch (1) according to claim 2, characterized in that the two electrodes (10a, 10b) of the pair of electrodes each have a plane geometry and extend parallel to each other, facing each other. opposite in the interior cavity (8) of the telescope (4).
[4]
4. Watch (1) according to claim 2, characterized in that the two electrodes (10a, 10b) of the pair of electrodes each have a cylindrical geometry and are arranged concentrically in the interior cavity (8) of the telescope (4), a first electrode (10a) formed of a metal sheet surrounding a second electrode (10b).
[5]
5. Watch (1) according to any one of the preceding claims, characterized in that it further comprises a mechanical element (14) for separation and / or electrical insulation of the two electrodes (10a, 10b) of the pair electrode.
[6]
6. Watch (1) according to claim 5 when it depends on claim 3, characterized in that the mechanical separation element (14) is formed of a fabric or polymer membrane.
[7]
7. Watch (1) according to claim 5 when it depends on claim 4, characterized in that the mechanical separating element (14) is formed of an ion-permeable membrane.
[8]
8. Watch (1) according to any one of the preceding claims, characterized in that it comprises several pairs of electrodes (10a, 10b) of opposite polarities, the pairs of electrodes (10a, 10b) being interconnected serial.
[9]
9. Watch (1) according to any one of the preceding claims, characterized in that the light source device (12) comprises at least one light-emitting diode (16).
[10]
10. Watch (1) according to claim 9, characterized in that the light-emitting diode (16) is coated in a protective resin capable of electrically isolating the light-emitting diode (16) from water.
[11]
11. Watch (1) according to claim 9 or 10, characterized in that the light-emitting diode (16) is arranged in the interior cavity (8) of the element (4), under the index (6).
[12]
12. Watch (1) according to any one of the preceding claims, characterized in that the index (6) is formed by an opening made in the element (4), said opening being provided with a window capable of let the light through.
[13]
13. Watch (1) according to claim 12, characterized in that the window is made of sapphire.
[14]
14. Watch (1) according to claim 13, characterized in that at least one of the free surfaces of the sapphire is frosted.
[15]
15. Watch (1) according to any one of the preceding claims, characterized in that a first electrode of the pair of electrodes is a zinc electrode, and a second electrode of the pair of electrodes is a copper electrode .
[16]
16. Watch (1) according to any one of claims 1 to 14, characterized in that the electrodes (10a, 10b) of the pair of electrodes are chosen so that the pair of electrodes (10a, 10b ) and sea water (15) form an Leclanché type electrochemical cell.
CH 715 017 A2
[17]
17. Watch (1) according to claim 16, characterized in that a cathode (10a) of the pair of electrodes comprises a manganese oxide deposited on a metal sheet.
[18]
18. Watch (1) according to any one of claims 1 to 14, characterized in that the electrodes (10a, 10b) of the pair of electrodes are chosen so that the pair of electrodes (10a, 10b ) and seawater (15) form an electrochemical cell of the metal / air type.
[19]
19. Watch (1) according to claim 18, characterized in that an anode (10b) of the pair of electrodes is made of a metallic material chosen from the group consisting of aluminum, zinc and magnesium .
[20]
20. Watch (1) according to any one of the preceding claims, characterized in that the bezel (4) is a rotating bezel.
[21]
21. Watch (1) according to any one of the preceding claims, characterized in that it comprises a plurality of indexes, interior cavities, pairs of electrodes and light source devices each associated respectively with an index .
[22]
22. Watch (1) according to any one of the preceding claims, characterized in that an interior wall of the interior cavity (8) is coated with a layer of a water-soluble salt.
[23]
23. Watch (1) according to any one of the preceding claims, characterized in that the watch (1) further comprises an external actuator and an additional light source device arranged in the watch case opposite a dial of the watch, the external actuator and the additional light source device being electrically connected to the pair of electrodes.
CH 715 017 A2

CH 715 017 A2
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同族专利:
公开号 | 公开日
CH715017B1|2021-12-30|
引用文献:
公开号 | 申请日 | 公开日 | 申请人 | 专利标题

法律状态:
优先权:
申请号 | 申请日 | 专利标题
CH00643/18A|CH715017B1|2018-05-23|2018-05-23|Watch comprising an element provided with an illuminable index.|CH00643/18A| CH715017B1|2018-05-23|2018-05-23|Watch comprising an element provided with an illuminable index.|
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