• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a display needle (1, 2) for a portable object such as a timepiece or a measuring instrument providing an indication by means of the display hand, in which is housed a source of rechargeable electric power supply. According to the invention, the display needle is formed of at least one solar cell, the power supply source being connected to the display needle to be recharged.
    公开号:CH711898A2
    申请号:CH01815/15
    申请日:2015-12-11
    公开日:2017-06-15
    发明作者:Tortora Pierpasquale
    申请人:Swatch Group Res & Dev Ltd；
    IPC主号:
    专利说明:

    Description
    Field of the Invention [0001] The invention relates to a solar display needle for a portable object. The present invention particularly relates to a set of solar display needles for a timepiece such as a wristwatch or an analog display meter.
    BACKGROUND OF THE INVENTION In a known manner, timepieces are equipped with a dial formed of a solar cell comprising a substrate, at least a plurality of superimposed layers defining at least one nip or pin element. and a conductive layer forming a first electrode intended to be exposed to the light radiation in order to be able to feed a horometric circuit or an electrical circuit of a timepiece such as a watch.
    EP 0 872 783 discloses a dial formed of a solar cell for a timepiece. Such a dial has a questionable aesthetic appearance and average electrical performance. Indeed, a dial formed of a solar cell must be translucent so that the cell is less visible and can not receive any kind of finishes or specific colors. SUMMARY OF THE INVENTION [0004] One of the objectives of the invention is to overcome the various drawbacks of these known techniques.
    More specifically, an object of the invention is to provide a display pointer formed of a solar cell to be free from sundials.
    These objectives, as well as others which will appear more clearly later, are achieved according to the invention with the aid of a display needle for a portable device providing an indication by means of the needle of the invention. display, in which is housed a source of power supply.
    According to the invention, the display needle is formed of at least one solar cell, the power supply source being connected to the at least one display needle to be recharged.
    Thus, the object of the present invention, by its various functional and structural aspects described above, provides a relatively compact control member while having a long stroke length.
    According to a preferred embodiment of the invention, the solar cell is a heterojunction cell.
    The invention also relates to a portable device comprising at least a first display needle and a second display pointer each being formed of at least one solar cell.
    According to an advantageous characteristic of the invention, the first and second display pointers are superimposed and each provided with a hole for the passage of a drive shaft, the driving axis of the second display pointer being concentrically disposed within the driving axis of the first display needle with interposition of an insulating layer between the two drive shafts, each of the first and second display needles comprising first and second poles, the first pole of the first display needle being electrically connected to a first terminal of the power source via the drive axis of the first display needle, the second pole of the first display needle being connected to the first pole of the second display hand via a contact piece which provides electrical continuity between the first and second the display pointer, and the second pole of the second display pointer being connected to the second terminal of the power source via the drive shaft of the second display pointer.
    According to another preferred feature, the contact piece is centered on the drive shaft.
    Advantageously, each of the first and second display needles comprises a first, respectively a second annular element each having in their center a hole for the passage of the drive shaft of the first and second needle respectively. display, the first and second annular members being each provided with an upper surface portion directed toward an observer, and a lower surface portion opposite the upper surface portion, the first and second annular members being formed an electrically conductive material, the first and second annular members each supporting the first and second display pointers.
    The invention also relates to a timepiece comprising at least one needle according to the invention. BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the invention will appear more clearly on reading the following description of a particular embodiment of the invention, given as a simple illustrative and nonlimiting example, and appended figures, among which: FIGS. 1 and 2 are views from above and below of a set of needles comprising a solar cells according to the invention; figs. 3 and 4 are exploded views of a set of needles comprising a solar cell according to the invention.
    Fig. 5 is a sectional view of a set of needles comprising a solar cell according to the invention.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0016] A controller according to a particular embodiment will now be described in the following with reference to FIGS. 1 and 2.
    The invention relates to a display needle 1 for a portable device providing an indication by means of the display needle 1, and wherein is housed a power source 36 in electrical energy.
    According to the invention, the display needle 1 is formed of at least one solar cell, the power source 36 in electrical energy being connected to the display needle 1 to be recharged.
    Although the skilled person may think that a set of solar needles 1.2 can not be sufficient as a source of energy compared to a dial, the inventor has shown that a set of solar halves could provide a comparable source of energy.
    Assuming that the surface of the watch has a luminance L, the power produced by the dial watch is given by the following equation:
    Pc = L x Sc x Tc x Ec x Tg (1) Where Sc is the surface of the dial, Tc is the transmission, Ec is the efficiency of the solar cell and TG is the transmission of ice.
    Typically, the following values are observed for equation (1): Sc = 8 × 10 -W; Tc = 0.35; Ec = 0.04 [0023] By integrating these values into equation (1), we obtain: PC = LxTg × 1.12 × 10 -5 W (2) For a portable device, such as a watch, with solar needles, the power produced is given by the following equation: PA = L x SA × EA × TG (3) Where SA is the area of two needles, and EA is the efficiency of the solar cell of the needles.
    For a set of hour-minute hands the surface SA = 4.4 x 10 "5m2.
    According to a preferred embodiment of the invention, the solar cell forming the display needle 1 is a heterojunction cell.
    Heterojunction solar cells are obtained by contacting different gap energy materials. For example, the silicon heterojunction consists of bringing hydrogenated amorphous silicon (a-Si: H) into contact with crystalline silicon (c-Si), the gap energy of a-Si: H being higher than that of the c-Si. Since the conductivity of a-Si: H is much lower than that of c-Si, a conductive layer must be added over its entire surface in order to collect the current. On the illuminated face of the cell, this conductive layer is generally made of a transparent conductive oxide (OTC) which collects the current. This OTC also ensures good contact with the metal electrodes, while acting as an anti-reflective layer.
    Currently available heterojunction cells have an efficiency of EA = 0.22. The thickness of such a cell is 150 μm, which is comparable to the thickness of the needles traditionally used in portable objects such as watches.
    By integrating the previous values into equation (3), we obtain: PA = L × TG × 0.97 × 10 -5 W (4). The luminance and the transmission of the ice being the same for the In two cases, the power obtained in equations (2) and (4) is quite comparable in both cases.
    Thus, the solution of solar needles has the advantage of being able to overcome the restrictions on the decorations of the dial for a watch for example, the dial can be made in the material, the color and the desired finish.
    Solar needles can be made by means of a known method and described in EP 0 948 060 in the name of Asulab SA. This patent describes the manufacture of a circular photovoltaic cell forming a dial for a timepiece such as a watch. However, in this patent the invention is not limited to dials, and can be used in the context of the manufacture of photovoltaic cells of any other form, including the manufacture of solar needles.
    In order to convey the energy collected by the solar needles, a particular structure must be provided for one of the poles of one of the solar needles to be connected to one of the poles of the other solar needle. thanks to the electrical contact between the two needles, which makes it possible to use the drive axes of the two needles for the electrical connection of the solar needles to the terminals of the power source. Such a structure is described by the Applicant in European Patent Application No. 14 170 094.8. In the following description, the structure of this patent application has been adapted to suit the use of solar needles.
    In the example shown in FIGS. 1 and 2, the set of needles according to the invention comprises a first and a second display needle, respectively 1 and 2. The first display needle 1 is formed of a first annular element 4 extended by a part 6 which can be formed by at least one solar cell and which extends substantially rectilinearly. The first annular element 4 has at its center a hole 8 for the passage of a drive shaft 10 of the first display needle 1. The first annular element 4 is provided with an upper surface portion 12 directed to the side an observer, and a lower surface portion 14 opposite the upper surface portion 12. The upper surface 12 and lower 14 portions of the first annular element 4 are interconnected along their perimeter by a surface According to a characteristic of the invention which will be described in more detail below, the first annular element 4 is coated with a layer of an electrically conductive material on its upper surface portions 12 and lower 14 as well as in the hole 8 in which is engaged the drive shaft 10.
    In a similar manner to the first display needle 1, the second display needle 2 is formed of a second annular element 18 extended by a portion 20 which can be formed by at least one solar cell and which extends substantially rectilinearly. The second annular element 18 of the second display needle 2 has in its center a hole 22 for the passage of a drive shaft 24 arranged concentrically inside the drive shaft 10 of the first needle. The second annular element 18 is provided with an upper surface portion 26 directed towards an observer, and a lower surface portion 28 opposite the upper surface portion 26. The upper surface portions 26 26 and lower 28 of the second annular element 18 are connected together along their perimeter by a lateral surface 30. According to a feature of the invention which will be described in more detail below, the second annular element 18 is also coated. of a layer of an electrically conductive material on its upper surface portions 26 and lower 28 and in the hole 22 in which is engaged the axis of training 24.
    The first and second needles 1 and 2 comprise first and second poles, respectively 32A, 32B and 34A, 34B, for their electrical connection to a power source 36 in electrical energy housed inside a frame for example a wristwatch equipped with the set of display needles 1,2. The power source 36 for electrical energy is for example a rechargeable battery.
    The first pole 32A of the first light source 32 is connected to the power source 36 via the drive shaft 10 of the first needle 1, and the second pole 32B of the first light source 32 is connected to the first pole 34A of the second light source 34 according to terms which will be described in detail below. As for the second pole 34B of the second light source 34, it is connected to the power source 36 via the drive shaft 24 of the second display hand 2. For this purpose, the drive axes 10 and 24 first and second display hands 1 and 2 must be electrically conductive and must be electrically isolated from each other by interposing an insulating layer 38.
    As mentioned above, the first and second annular members 4 and 18 are coated on their upper and lower surface portions with a layer of an electrically conductive material. More precisely, the drive shaft 24 is driven into a metallized hole 22 formed in the second annular element 18. Consequently, the upper surface portion 26 of the second annular element 18 is brought to the same electrical potential as the 24. On the other hand (see FIG 4), a continuous trench 40 formed in the lower surface portion 28 of the second annular element 18 and rendered electrically insulating by local removal of the electrically conductive material surrounds the drive shaft 24, so that the lower surface portion 28 is electrically insulated from the drive shaft 24. Likewise, a continuous trench 42 which closes on itself and is rendered insulating in the same way as the continuous trench 40 is formed in the upper surface portion 26 of the second annular element 18, so as to create an island 44 electrically isolated from the remainder of the portion of the upper surface 26. A through-hole 46 metallized pierced in the thickness of the second annular element 18 is used to electrically connect the island 44 formed in the upper surface portion 26 and the lower surface portion 28.
    Similarly, the drive shaft 10 is driven into a metallized hole 8 formed in the first annular element 4. Consequently, the lower surface portion 14 of the first annular element 4 is brought to the same electrical potential as the drive shaft 10. On the other hand, a continuous trench 48 formed in the upper surface portion 12 of the first annular element 4 and made electrically insulating by local removal of the electrically conductive material surrounds the drive shaft 10, so that that the upper surface portion 12 is electrically insulated from the drive shaft 10. Likewise, a continuous trench 50 which closes on itself and which is rendered insulating in the same way as the continuous trench 48 is provided in the lower surface portion 14 of the first annular element 4, so as to create an island 52 electrically isolated from the remainder of the surface portion 14. A metallized through hole 54 pierced in the thickness of the first annular element 4 electrically interconnects the island 52 formed in the lower surface portion 14 and the upper surface portion 12.
    Finally, the lower surface portion 28 of the second annular element 18 is brought into contact with the upper surface portion 12 of the first annular element 4 via an electrically conductive and mechanically elastic contact piece 56 disposed between the first and second needles. 1 and 2 and centered on the drive axis 10. The island 44 formed in the upper surface portion 26 is electrically connected to the upper surface portion 12 of the first annular element 4, this surface portion. upper 12 being itself electrically connected to the island 52 formed in the lower surface portion 14 of the first annular element 4.
    According to the invention, the first pole 32A is electrically connected to a first terminal of the power source 36 via the drive shaft 10 of the first display needle 1. For this purpose, the first 32A pole is connected, for example by wire bonding technique well known in its English terminology of "wire bonding", to the lower surface portion 14 of the first annular element 4. As for the second pole 32B, it is connected at the first pole 34A via the contact piece 56 which provides the electrical continuity between the first and the second display needle 1, 2. For this, the second pole 32B is connected to the island 52 formed in the lower surface portion 14 of the first annular element 4. Through the metallized through hole 54 pierced in the thickness of the first annular element 4, the island 52 is electrically connected to the upper surface portion 12 of the first element. the annular element 4, this upper surface portion 12 being itself connected through the contact piece 56 to the lower surface portion 28 of the second annular element 18. The lower surface portion 28 of the second annular element 18 is itself connected to the island 44 formed in the upper surface portion 26 of the second annular element 18 via the metallized via 46. Finally, the first pole 34A is electrically connected to the island 44 formed in the upper surface portion 26 the second pole 34B, it is connected to the second terminal of the power source 36 via the drive shaft 24. For this, the second pole 34B is electrically connected to the surface portion upper 26 of the second annular element 18.
    Of course, the present invention is not limited to the example shown and is susceptible of various variations and modifications that will occur to those skilled in the art.
    NOMENCLATURE
    [0044] 1. First display pointer, 2. Second display pointer, 4. Annular element, 6. Part that extends substantially rectilinearly, 8. Hole, 10. Drive shaft, 12. Surface portion Upper, 14. Lower surface portion, 16. Side surface, 18. Annular element, 20. Part that extends substantially straight, 22. Hole, 24. Drive shaft, 26. Upper surface portion,
    权利要求:
    Claims (13)
    [28]
    28. Lower surface portion,
    [30]
    30. Side surface, 32A, 32B. First and second poles, 24A, 34B. First and second poles,
    [36]
    36. Power supply source,
    [38]
    38. Insulating layer,
    [56]
    56. Contact piece. claims
    [1]
    1. Display needle for a portable object providing an indication by means of the display hand, in which is housed a power source (36) in rechargeable electrical energy, characterized in that the display needle is formed of at least one solar cell, the power source (36) of electrical energy being connected to the display needle to be recharged.
    [2]
    The display needle of claim 1, wherein the solar cell is a heterojunction cell.
    [3]
    The portable object of claim 1 comprising at least a first display hand and a second display hand each formed of at least one solar cell.
    [4]
    The portable object according to claim 3, wherein the first and second display pointers (1, 2) are superimposed and each provided with a hole (8, 22) for the passage of a drive shaft ( 10, 24), the drive shaft (24) of the second display pointer (2) being arranged concentrically inside the drive shaft (10) of the first display pointer (1). ) with an insulating layer (38) interposed between the two drive shafts (10, 24), each of the first and second display hands (1, 2) comprising a first and a second pole (32A, 32B; 34A, 34B), the first pole (32A) of the first display pointer (1) being electrically connected to a first terminal of the power source (36) via the drive shaft (10) of the first display pointer (1), the second pole (32B) of the first display pointer (1) being connected to the first pole (34A) of the second display needle (1) display guille (2) via a contact piece (56) which provides electrical continuity between the first and second display pointers (1,2), and the second pole (34B) of the second display pointer (2) being connected to the second terminal of the power source (36) via the drive shaft (24) of the second display pointer (2).
    [5]
    Portable object according to claim 4, wherein the contact piece (56) is centered on the drive shaft (10).
    [6]
    6. Portable object according to one of claims 3 to 5, wherein each of the first and second display hands (1, 2) comprises a first, respectively a second annular element (4, 18) each having in their center a hole (8, 22) for the passage of the drive shaft (10, 24) of the first, respectively the second display needle (1, 2), the first and second annular members (4; 18) being each having an upper surface portion (12; 26) facing an observer, and a lower surface portion (14; 28) opposite the upper surface portion (12; 26), the first and second annular members (4, 18) being formed of an electrically conductive material.
    [7]
    The portable object of claim 6, wherein the first and second annular members (4, 18) each support the first and second display pointers (1, 2).
    [8]
    8. Timepiece comprising at least one needle according to one of the preceding claims.
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    同族专利:
    公开号 | 公开日
    CH711898B1|2020-03-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2021-07-30| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    CH01815/15A|CH711898B1|2015-12-11|2015-12-11|Portable object such as a timepiece or a measuring device comprising solar display needles.|CH01815/15A| CH711898B1|2015-12-11|2015-12-11|Portable object such as a timepiece or a measuring device comprising solar display needles.|
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