solar-powered watch

Abstract

To provide a solar watch that has good assembling properties and light permeability, and includes a dial with excellent design.SOLUTION: A solar watch comprises a dial on a solar cell. Decorative members are provided on the dial. The dial has sub dials. A semi-transmissive reflecting plate is provided between the solar cell and the dial. The semi-transmissive reflecting plate has first areas selectively provided at portions overlapping the sub dials, a second area provided at a portion overlapping an outer periphery of the dial, and third areas connecting the first areas and the second area with each other. The third areas are selectively provided at portions overlapping the decorative members.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a solar-powered timepiece. [Background technology]

[0002] Solar watches equipped with a solar cell under the dial are known. For example, Patent Document 1 discloses a solar watch in which a semi-transparent reflector and a transparent dial with a prism on the underside are placed on top of the solar cell. According to this document, the deep purple color of the solar cell disappears without interfering with the power generation of the solar cell, and a white tinge appears on the transparent dial, making the display on the watch dial bright and clear. Furthermore, based on the appearance of Figure 1 in this document, the solar watch is presumed to be a three-hand analog watch.

[0003] On the other hand, multi-axis watches are also known, which have a sub-dial with a chronograph minute hand or a chronograph hand within a main dial that displays the time like a chronograph watch. In such multi-axis watches, multiple small circular sub-dials are laid out within a circular main dial. In multi-axis watches, there is a need to be able to selectively change the color of the sub-dials to enhance the design. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-174948 Summary of the Invention [Problem to be solved by the invention]

[0005] Here, to enhance the design of a multi-axis watch, it would be conceivable to provide a semi-transparent reflector only on the subdials, but Patent Document 1 does not mention or suggest anything about subdials. It would also be conceivable to attach a semi-transparent reflector only to the subdial portion, but this could potentially spoil the aesthetic appearance if the adhesive or double-sided tape used to attach the reflector were visible. Furthermore, if there are multiple subdials, it would be necessary to attach a semi-transparent reflector to each one, which would make assembly difficult. In other words, there was a demand for a solar watch that was easy to assemble, had good light transmittance, and had a dial with excellent design. [Means for solving the problem]

[0006] One aspect of the solar watch according to the present application is a solar watch having a dial on top of a solar cell, wherein a decorative member is provided on top of the dial, the dial has a subdial, and a semi-transparent reflector is provided between the solar cell and the dial, the semi-transparent reflector having a first area selectively provided in a portion overlapping with the subdial, a second area provided in a portion overlapping with the outer periphery of the dial, and a third area connecting the first area and the second area, and the third area is selectively provided in a portion overlapping with the decorative member. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a front view of a timepiece according to a first embodiment. [Figure 2] An exploded perspective view of the area around the dial. [Figure 3] FIG. 2 is a cross-sectional view taken along the line bb in FIG. 1 . [Figure 4] Plan view of the dial ring. [Figure 5] Plan view of the dial. [Figure 6] FIG. 6 is a cross-sectional view taken along the line cc in FIG. 5 . [Figure 7] FIG. [Figure 8] Photographs of an embodiment of a watch. [Figure 9]FIG. 10 is a plan view of a semi-transmissive reflector according to a second embodiment. [Figure 10] 1A to 1C are plan views of transflectors of different shapes. [Figure 11] FIG. 11 is an exploded perspective view of a dial according to a third embodiment. [Figure 12] FIG. 10 is a detailed view of a semi-transmissive reflector according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Embodiment 1 ***Clock Overview*** FIG. 1 is a front view of the watch. Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0009] As shown in FIG. 1, the timepiece 100 is a multi-axis solar analog timepiece that has three small subdials 31, 32, and 33 within a dial 50 that has a second hand 2, a minute hand 3, and an hour hand 4, and is equipped with a solar panel on the back of the dial 50. The dial 50 is also referred to as the main dial. The dial 50 is circular, and its outer periphery is surrounded by a dial ring 40. A crown 61 is provided on the 3 o'clock side of the timepiece 100. An operating button 9a is provided on the 2 o'clock side of the timepiece 100, and an operating button 9b is provided on the 4 o'clock side. Various functions of the timepiece 100 are executed by operating the crown 61 and the operating buttons 9a and 9b.

[0010] A subdial 31 is provided on the 3 o'clock side of the dial 50. The subdial 31 is a day indicator and includes a day hand 5 that indicates the day of the week. A subdial 32 is provided on the 6 o'clock side of the dial 50. The subdial 32 is a small 12-hour clock and includes a minute hand 6 and an hour hand 7. A subdial 34, which is smaller than the subdial 31, is provided between the subdial 31 and the subdial 32. The subdial 34 is provided with an AM / PM hand 9 that indicates AM / PM of the time displayed on the subdial 32. The subdial 34 is substantially integrated with the subdial 31 and is provided as a part of the subdial 31.

[0011] A date window 62 for displaying the date is provided at the 4:30 position on the dial 50. A subdial 33 is provided on the 9 o'clock side of the dial 50. The subdial 33 is an indicator that shows various conditions such as the remaining energy level, and is equipped with an indicator hand 8. The functions assigned to the subdials 31, 32, and 33 are not limited to those described above, and may be, for example, a seconds counter, a chronograph minute counter, or a 24-hour clock. The number of subdials is not limited to three, and it is sufficient to have one or more subdials.

[0012] ***Dial Composition*** Fig. 2 is an exploded perspective view of the dial and its surrounding area. Fig. 3 is a cross-sectional view taken along the line bb in Fig. 1. Here, the configuration of the dial 50 and its surrounding area will be described.

[0013] As shown in Fig. 3, the internal structure of the timepiece 100 is configured by stacking a solar cell 90, a semi-transparent reflector 20, a dial 50, and a dial ring 40 on top of a movement 77. As shown in Fig. 2, the dial 50 has three small circular subdials 31, 32, and 33 on a circular, light-transmitting substrate 30. In a preferred example, the substrate 30 is a transparent plate injection-molded from polycarbonate resin. However, the material is not limited to this, and the substrate 30 may be made of any translucent resin, such as acrylic resin or polystyrene resin. The substrate 30 may also be given a transparent color, which is a color that provides transparency. The transparent color may be achieved by applying a translucent color to a resin material, or by applying a transparent color paint or coating to the transparent substrate 30. This enhances the design of the dial 50. For example, applying a light black color coating to the main dial other than the subdials can make the color (dark purple) of the solar cell 90 less noticeable. In this case, the subdials are not color-coated, so the transparent substrate 30 is exposed. In other words, the subdials are light-colored, while the main dial other than the subdials is dark-colored. Light colors refer to colors that easily transmit the color of the solar cell 90 arranged below the dial 50, such as transparent or white. Dark colors refer to colors that do not easily transmit the color of the solar cell 90 arranged below the dial 50, such as black or purple.

[0014] The dial ring 40 is composed of a ring-shaped annular portion 41 that overlaps the outer periphery of the base plate 30, and a plurality of hour markers 43 provided inside the annular portion 41. As shown in Figure 3, the hour markers 43, which serve as decorative members, are fixed to the annular portion 41 by two fixing pins 43a. The outer periphery of the dial ring 40 is surrounded by a bezel 60. A crystal 63 is fitted into the bezel 60. The bezel 60 is a cover that is combined with a case 65 made of a hard metal such as stainless steel. The case 65 is the case of the timepiece 100, and houses the movement 77, solar cell 90, semi-transparent reflector 20, dial 50, etc.

[0015] FIG. 4 is a plan view of the dial ring. As shown in Fig. 4, the hour markers 43 are provided spaced apart from one another at the time positions from 1 o'clock to 12 o'clock. The hour markers 43 are rectangular and protrude inward from the annular portion 41. In addition, minute markers are printed on the annular portion 41.

[0016] Fig. 5 is a plan view of the dial, and Fig. 6 is a cross-sectional view taken along line cc in Fig. 5. As shown in FIG. 5 , the base plate 30 of the dial 50 is provided with a plurality of insertion holes for passing the shafts of the hands. More specifically, a hole 35a is provided in the center of the base plate 30 for passing the shafts of the second hand 2, minute hand 3, and hour hand 4. A hole 36a is provided in the center of the subdial 31 for passing the shaft of the day hand 5. Similarly, a hole 37a is provided in the center of the subdial 32 for passing the shafts of the minute hand 6 and hour hand 7, and a hole 38a is provided in the center of the subdial 33 for passing the shaft of the indicator hand 8. A hole 39a is provided in the center of the subdial 34 for passing the shaft of the AMPM hand 9. The base plate 30 also has a rectangular hole 62a corresponding to the date window 62.

[0017] A subdial ring 73 is provided on the outer periphery of the subdial 33. As shown in FIG. 6, the subdial ring 73 is a ring-shaped member, and is fixed to the substrate 30 with a fixing pin 73a. Graduations and letters for indicator display are printed on the surface of the subdial ring 73. The presence of the subdial ring 73 allows the subdial 33 to be observed three-dimensionally. In addition, the surface position of the subdial 33 is one step lower than the reference surface position of the substrate 30. This is to make the subdial 33, including the subdial ring 73, appear more three-dimensional. Similarly, a subdial ring 71 is provided on the outer periphery of subdial 31, and a subdial ring 72 is provided on the outer periphery of subdial 32. Letters indicating the days of the week are printed on the surface of subdial ring 71. Minute markers and hour markers are printed on the surface of subdial ring 72.

[0018] A plurality of positioning protrusions 75a are provided on the outer periphery of the base plate 30. The protrusions 75a are provided in pairs of two. The pair of protrusions 75a determines the position of the dial 50 in the rotational direction, and is positioned by fitting a positioning pin (not shown) provided on the movement 77 between the two protrusions. The pairs of protrusions 75a are provided in four locations: near 12 o'clock, near 2:30, near 5:30, and near 7:30. 5, the outer shape of the dial ring 40 is indicated by a dotted line. The inner circumference of the annular portion 41 of the dial ring 40 is set to be slightly smaller than the outer circumference of the base plate 30 of the dial 50. In other words, the outer periphery of the dial 50 is covered by a portion of the annular portion 41 of the dial ring 40.

[0019] ***Configuration of semi-transparent reflector*** FIG. 7 is a plan view of the transflector. 7, semi-transmissive reflector 20 is composed of ring-shaped annular portion 25 that overlaps with annular portion 41 of dial ring 40, three island-shaped portions 21, 22, and 23 provided inside annular portion 25, and connection portions 81, 82, and 83 that connect annular portion 25 and the island-shaped portions. Island-shaped portions 21, 22, and 23 correspond to a first region. Annular portion 25 corresponds to a second region.

[0020] 2, island-shaped portion 21 is selectively provided in a portion of dial 50 that overlaps with subdials 31 and 34. Similarly, island-shaped portion 22 is selectively provided in a portion of dial 50 that overlaps with subdial 32. Island-shaped portion 23 is selectively provided in a portion of dial 50 that overlaps with subdial 33. Similarly to the base plate 30 of the dial 50, the island-shaped portions 21, 22, and 23 are provided with holes for inserting the hand shafts. The island-shaped portion 21 is provided with holes 36b and 39b corresponding to the holes 36a and 39a of the dial 50. The island-shaped portion 22 is provided with hole 37b corresponding to hole 37a of the dial 50. The island-shaped portion 23 is provided with hole 38b corresponding to hole 38a of the dial 50. The solar cell 90 also has holes for inserting the hand shafts. The solar cell 90 has holes 35c, 36c, 37c, 38c, and 39c corresponding to holes 35a, 36a, 37a, 38a, and 39a of the dial 50. The solar cell 90 also has a rectangular hole 62c corresponding to rectangular hole 62a of the dial 50.

[0021] Returning to Figure 7, in Figure 7, the outline of the dial ring 40 is shown by a dotted line. The connecting portion 81 is a rod-shaped connecting portion that connects the island portion 21 and the annular portion 25, and is provided at a position overlapping the hour markers 43 at the 3 o'clock position of the dial ring 40. Similarly, the connecting portion 82 that connects the island portion 22 and the annular portion 25 is provided at a portion that overlaps the hour markers 43 at the 6 o'clock position of the dial ring 40. The connecting portion 83 that connects the island portion 23 and the annular portion 25 is provided at a position that overlaps the hour markers 43 at the 9 o'clock position of the dial ring 40. In other words, the connecting portions 81, 82, and 83 are selectively provided at positions that overlap the hour markers 43 as decorative members. Therefore, when the timepiece 100 is viewed from the front, the connecting portions 81, 82, and 83 are hidden by the decorative members. Note that the decorative members are not limited to the hour markers 43, and may be any portion provided on the dial 50, such as abbreviated characters, rings, logos, stars, or other design elements.

[0022] Similar to the dial 50, the outer periphery of the annular portion 25 is provided with a plurality of positioning protrusions 75b that protrude outward. The protrusions 75b are provided in pairs, and are positioned to overlap with the protrusions 75a on the dial 50. Similar to the pairs of protrusions 75a on the dial 50, the pairs of protrusions 75b are provided in four locations: near 12 o'clock, near 2:30, near 5:30, and near 7:30. The protrusions 75b correspond to the fifth region.

[0023] In other words, the semi-transmissive reflector 20 has island-shaped portions 21, 22, and 23 as first regions selectively provided in portions overlapping with the subdials 31, 32, and 33, an annular portion 25 as a second region provided in a portion overlapping with the outer periphery of the dial 50, and connecting portions 81, 82, and 83 as a third region connecting the first and second regions, and the connecting portions 81, 82, and 83 are selectively provided in a portion overlapping with the hour scale 43 as a decorative member. In addition, the semi-transmissive reflector 20 further has a protrusion 75b as a fifth region that protrudes outward from the annular portion 25.

[0024] In a preferred example, a reflective polarizing plate having both light transmission and light reflection functions is used as the constituent material of the semi-transmitting reflector 20. The semi-transmitting reflector 20 is formed by cutting out a large sheet-like reflective polarizing plate into the shape shown in FIG. 7 using a blade such as a Thomson cutter. The reflective polarizing plate has two functions: to transmit a required amount of light to generate electricity in the solar cell 90 (FIG. 2), and to reflect a certain amount of light to brighten the dial 50. An example of a reflective polarizing plate is DBEF (Dual Brightness Enhancement Film) (registered trademark) manufactured by Sumitomo 3M Limited. Reflective polarizing plates include those that reflect light in a glossy silver color and those that reflect light in a gold color; when a silver-colored polarizing plate is used, a whitish metallic color appears. In FIG. 8, which will be described later, a silver-colored polarizing plate is used as a preferred example, but the two colors can be selected appropriately depending on the design, etc.

[0025] The material for the semi-transmissive reflector 20 is not limited to a reflective polarizing plate, but may be any thin plate material that has both light transmission and light reflection functions, such as a transparent resin sheet or resin plate provided with a thin metal or paint film that has transparency, or a brightness enhancement film such as a prism sheet. Also, a thin plate with a plurality of small holes may be used.

[0026] ***Dial assembly*** Return to Figure 2. When assembling the dial 50, dial ring 40, etc., the solar cell 90 is installed in the movement 77 (Figure 3), and then the semi-transparent reflector 20, dial 50, and dial ring 40 are placed on top of the solar cell 90 in that order, as shown in Figure 2. In this case, the semi-transmissive reflector 20 has three island-shaped portions 21, 22, and 23 corresponding to the subdials that are integrated with the annular portion 25, so that it can be set on the solar cell 90 in one operation, resulting in good assembly ease. Furthermore, because the connection portions 81, 82, and 83 are positioned so as to overlap with the hour scale 43, the connection portions 81, 82, and 83 are not visible. Therefore, the semi-transmissive reflector 20 does not appear on the exterior and does not detract from the aesthetic appearance.

[0027] FIG. 8 is a photograph of an example of a watch equipped with a transflector. 8 shows a photograph of a prototype (embodiment) watch 100 equipped with the above-described semi-transparent reflector 20. The semi-transparent reflector 20 is silver in color, and the dial 50 is a light color with a white translucent coating.

[0028] As shown in Figure 8, the appearance of the timepiece 100 is such that the base of the dial 50 is deep purple, with the three subdials being a metallic silver color. The deep purple color of the dial 50 is due to the color tone of the solar cell 90. The silver color of the subdials is mainly due to the dispersion and diffusion of external light reflected by the semi-transparent reflector 20. As with the dial 50, the subdials also receive reflected light from the solar cell 90, but because most of the reflected light is reflected by the semi-transparent reflector 20 and re-enters the solar cell 90, the effect of the color tone of the solar cell 90 is minimal. In this way, a timepiece 100 equipped with a semi-transparent reflector 20 can make the subdials stand out against the base of the dial 50, enhancing the design. The semi-transparent reflector 20 may also be provided in a location other than the subdials. For example, if a star-shaped semi-transparent reflector is provided at the base of the dial 50, a shining silver star shape can be created.

[0029] As described above, the timepiece 100 of this embodiment has the following advantages. The timepiece 100 is a solar watch having a dial 50 on a solar cell 90, on which hour markers 43 are provided as a decorative member, the dial 50 having subdials 31, 32, 33, and a semi-transparent reflector 20 between the solar cell 90 and the dial 50, the semi-transparent reflector 20 having island-shaped portions 21, 22, 23 as a first region selectively provided in the portion overlapping with the subdials 31, 32, 33, a circular portion 25 as a second region provided in the portion overlapping with the outer periphery of the dial 50, and connecting portions 81, 82, 83 as a third region connecting the first region and the second region, the connecting portions 81, 82, 83 being selectively provided in the portion overlapping with the hour markers 43 as a decorative member.

[0030] According to this, in a dial design in which the subdials 31, 32, and 33 are light-colored and the main dials other than the subdials are dark-colored, by arranging the semi-transparent reflector 20 in a position overlapping the subdials, it is possible to prevent the color of the solar cell 90 from being transmitted through the subdials. The semi-transparent reflector 20 is integrated with a first region selectively arranged in the subdials 31, 32, and 33 portions, a second region on the periphery, and a third region connecting the two regions, resulting in easy assembly. Furthermore, the connecting portions 81, 82, and 83 as the third region are selectively arranged in a position overlapping the hour scale 43 as a decorative member, so they are not visible from the outside and do not detract from the aesthetic appeal. Furthermore, because the semi-transparent reflector 20 is not arranged in the portions overlapping the main dials other than the subdials, the light transmittance is higher than that of the subdial portions, allowing more external light to enter the solar cell 90, thereby improving power generation efficiency. Therefore, it is possible to provide a timepiece 100 that is easy to assemble, has good light transmittance, and is equipped with a dial 50 that has an excellent design.

[0031] The decorative member may also be an abbreviation, a ring, or a logo including hour markers 43 . This makes it possible to provide the third region (connecting portion) at a position that overlaps these decorative members, depending on the design.

[0032] The semi-transmissive reflector 20 further includes a protrusion 75b as a fifth region that protrudes outward from the annular portion 25 as a second region. The protrusion 75b is provided at a position where it overlaps with the protrusion 75a of the dial 50. This allows the semi-transmissive reflector 20 and the dial 50 to be positioned appropriately.

[0033] Embodiment 2 ***Different configurations of transflectors*** FIG. 9 is a plan view of the semi-transmissive reflector according to the second embodiment, and corresponds to FIG. In the above embodiment, the three island-shaped portions 21, 22, and 23 in the semi-transmissive reflector 20 are described as being connected to the annular portion 25, but this configuration is not limited thereto and they may be connected at positions that overlap the decorative member. For example, in the semi-transmissive reflector 27 of this embodiment, the island-shaped portions 21 and 23 are not connected to the annular portion 25, but are connected to the island-shaped portion 22. Hereinafter, the same parts as in the above embodiment will be assigned the same numbers, and duplicated descriptions will be omitted.

[0034] As shown in FIG. 9, in the semi-transmissive reflector 27, the annular portion 25 and the island portion 22 are connected by a connecting portion 82, but the island portions 21 and 23 are not connected to the annular portion 25. Island-shaped portion 21 is connected to island-shaped portion 22 by connecting portion 84, which serves as a fourth region. Island-shaped portion 21 and island-shaped portion 22 are close to each other, and connecting portion 84 crosses subdial ring 72 (Fig. 2), so the portion overlapping with the ring does not appear on the outside. Island-shaped portion 23 is connected to island-shaped portion 22 by connecting portion 85, which serves as a fourth region. Island-shaped portion 23 and island-shaped portion 22 are close to each other, and connecting portion 85 crosses subdial rings 72, 73 (Fig. 2), so the portion overlapping with the ring does not appear on the outside.

[0035] Furthermore, the island-shaped portions 21 and 23 are connected to the annular portion 25 via the island-shaped portion 22 and are integrated together, so that the semi-transmissive reflector 27 can be handled as a single component, and assembly is easy. In other words, the semi-transmissive reflector 27 has island-shaped portions 21, 22, and 23 as first regions, and further has connecting portions 84 and 85 as fourth regions that connect the first regions to each other.

[0036] FIG. 10 is a plan view of a transflector having a different configuration, and corresponds to FIG. In the semi-transmissive reflector 28 having a different configuration, each of the three island-shaped portions 21, 22, and 23 has a connection portion with the annular portion 25 and connection portions that connect the island-shaped portions to each other. Specifically, the island-shaped portion 21 has a connection portion 84 that connects it to the island-shaped portion 22 and a connection portion 81 that connects it to the annular portion 25. The island-shaped portion 23 has a connection portion 85 that connects it to the island-shaped portion 22 and a connection portion 83 that connects it to the annular portion 25. Other than these points, the configuration is the same as that of the semi-transmissive reflector 28. As a result, the annular portion 25 and the three island-shaped portions 21, 22, and 23 are connected more closely, which increases the unity of the parts and makes them easier to handle during assembly.

[0037] Furthermore, the semi-transmissive reflector 28 may have a configuration in which a portion of the annular portion 25 is cut out. Specifically, the annular portion 25 in the range indicated by the arrow q in FIG. 10 may be eliminated. Even if this portion is omitted, the annular portion 25 and the island portions 21 and 23 are securely connected by the connecting portions 81 and 83, ensuring the integrity of the component and not compromising assembly. Furthermore, the presence of three pairs of positioning protrusions 75b provides sufficient positioning and anti-rotation functions. This configuration allows the size of the semi-transmissive reflector 28 to be reduced, allowing for more semi-transmissive reflectors 28 to be cut out from a large sheet, thereby reducing component costs.

[0038] As described above, the timepiece 100 of this embodiment has the following advantages in addition to the advantages of the above embodiment. The semi-transmissive reflectors 27 and 28 have island-shaped portions 21, 22, and 23 as first regions, and further have connecting portions 84 and 85 as fourth regions that connect the first regions to each other. In addition to the connecting portions 84 and 85, the semi-transmissive reflector 28 also has connecting portions 81 and 83 that connect to the annular portion 25. This allows the annular portion 25 and the three island-shaped portions 21, 22, 23 to be more closely connected, increasing the unity of the components and making them easier to handle during assembly. Therefore, it is possible to provide a timepiece 100 that is easy to assemble, has good light transmittance, and is equipped with a dial 50 that has an excellent design.

[0039] Embodiment 3 ***Different dial configurations*** FIG. 11 is an exploded perspective view of the dial according to the third embodiment, and corresponds to FIG. In the above embodiment, the dial 50 has been described as having a single plate structure, but this is not limited to this structure and may, for example, be a two-plate structure. The dial 58 of this embodiment differs from the first embodiment in that it has a two-plate structure in which the above-mentioned dial 50 is used as the first dial and a second dial 55 is placed on top of it. Hereinafter, the same parts as in the above embodiment will be assigned the same numbers and redundant explanations will be omitted.

[0040] As shown in FIG. 11, the dial 58 of this embodiment has a configuration in which a second dial 55 is placed on top of the dial 50. Like the base plate 30 of the dial 50, the second dial 55 is a transparent plate-shaped member molded from a transparent resin, and has openings 31d, 32d, and 33d corresponding to the three subdials. It also has a hole 35d corresponding to the hole 35a of the dial 50, and a rectangular hole 62d corresponding to the rectangular hole 62a of the dial 50.

[0041] Opening 31d corresponds to subdial 31 (FIG. 2) and is large enough to expose up to subdial ring 71. Opening 32d corresponds to subdial 32 and is large enough to expose up to subdial ring 72. Openings 31d and 32d are connected in an eight-shape to form a single opening. The opening 33d corresponds to the sub-dial 33 and is large enough to expose the sub-dial ring 73 as well. In a preferred embodiment, the second dial 55 is given a transparent color.

[0042] In other words, the dial 58 consists of the dial 50 as the first dial and the second dial 55, the second dial 55 being superimposed on the dial 50 and having openings 31d, 32d, and 33d, the dial 50 having subdials 31, 32, and 33 at positions overlapping with the openings 31d, 32d, and 33d, and the semi-transparent reflector 20 being positioned between the solar cell 90 and the dial 50.

[0043] As described above, the timepiece 100 of this embodiment has the following advantages in addition to the advantages of the above embodiment. The dial 58 consists of a dial 50 as a first dial and a second dial 55, the second dial 55 being superimposed on the dial 50 and having openings 31d, 32d, and 33d, the dial 50 having subdials 31, 32, and 33 at positions overlapping with the openings 31d, 32d, and 33d, and the semi-transparent reflector 20 being positioned between the solar cell 90 and the dial 50.

[0044] This allows the appearance of the dial 58 to be more three-dimensional by providing the second dial 55. Furthermore, by applying a transparent color to the second dial 55, a wider variety of color expressions can be achieved. Therefore, it is possible to provide a timepiece 100 that is easy to assemble, has good light transmittance, and is equipped with a dial 58 that has an excellent design.

[0045] Embodiment 4 ***Different configurations of transflectors*** FIG. 12 is a detailed view of the semi-transmissive reflector according to the fourth embodiment, and is an enlarged view of the part f in FIG.

[0046] 7, processing to increase the light transmittance may be performed on the three island-shaped portions 21, 22, and 23. FIG. 12 is an enlarged view of portion f in island-shaped portion 22 in FIG. As shown in Figure 12, the island-shaped portion 22 has a plurality of holes. In a preferred embodiment, these holes are formed by laser processing, and the hole diameter is approximately 100 µm or more and 200 µm or less. Note that the method is not limited to laser processing, and any method capable of forming similar holes may be used. Similarly, a plurality of holes are formed in the other island-shaped portions 21 and 23. In other words, the islands 21, 22, and 23 serving as the first regions in the semi-transmissive reflector 20 are provided with a plurality of holes.

[0047] As described above, the timepiece 100 of this embodiment has the following advantages in addition to the advantages of the above embodiment. A plurality of holes are provided in the island-shaped portions 21, 22, and 23 serving as the first regions in the semi-transmissive reflector 20. Furthermore, because the holes are minute, they are difficult to see, do not impair the design, and have almost no effect on the color tone of the solar cells 90. This increases the light transmittance in the first region, thereby increasing the power generation efficiency of the solar cell 90. Therefore, it is possible to provide a timepiece 100 that is easy to assemble, has good light transmittance, and is equipped with a dial 50 that has an excellent design. [Explanation of symbols]

[0048] 2...Second hand, 3...Minute hand, 4...Hour hand, 5...Day hand, 6...Minute hand, 7...Hour hand, 8...Indicator hand, 9...AMPM hand, 9a, 9b...Operation buttons, 20...Semi-transparent reflector, 21-23...Island portion, 25...Annular portion, 27, 28...Semi-transparent reflector, 30...Base, 31-33...Sub-dials, 31d-33d...Opening, 35a, 35c, 35d...Hole, 36a, 36b, 36c...Hole, 37a, 37b, 37c...Hole, 38a, 38b, 38c...Hole, 3 9a, 39b, 39c...hole, 40...dial ring, 41...ring portion, 43...hour scale, 43a...fixing pin, 50...dial, 55...second dial, 58...dial, 60...bezel, 61...crown, 62...date window, 62a, 62c, 62d...square holes, 63...crystal, 65...body, 71-73...subdial ring, 75a...projection, 75b...projection, 77...movement, 81-85...connection, 90...solar cell, 100...watch.

Claims

1. A solar cell, a first dial having a through-hole through which the hand stem is inserted and a sub-dial; a semi-transmissive reflector disposed between the solar cell and the first dial; a decorative member disposed on the opposite side of the first dial from the semi-transmissive reflector; Equipped with The semi-transmissive reflector is a first area provided at a position overlapping the sub-dial when viewed from an axial direction along the stem; a second region provided at a position overlapping the outer periphery of the first dial when viewed from the axial direction; a third region that connects the first region and the second region and is provided at a position that overlaps the decorative member when viewed from the axial direction; Solar watch.

2. Further comprising a second dial plate disposed between the first dial plate and the decorative member; the second dial is superimposed on the first dial and has an opening; The sub-dial is disposed at a position overlapping the opening when viewed from the axial direction.

2. The solar watch according to claim 1.

3. The decorative member is an abbreviation, a ring, or a logo.

3. The solar watch according to claim 1 or 2.

4. the transflector has a plurality of the first regions, Further, a fourth region connecting the first regions to each other is provided. The solar watch according to any one of claims 1 to 3.

5. The semi-transmissive reflector further includes a fifth region protruding outward from the second region. The solar watch according to any one of claims 1 to 4.

6. the first region of the semi-transmissive reflector is provided with a plurality of holes having a hole diameter of 100 μm or more and 200 μm or less, which holes enhance light transmittance; The solar watch according to any one of claims 1 to 5.

7. In the first dial, the sub-dials are light-colored, and the main dial other than the sub-dials is dark-colored. The solar watch according to any one of claims 1 to 6.

Images