JP6813622B2 - Clock with solar cell - Google Patents

Description

The present invention relates to a timepiece with a solar cell.

In a watch with a solar cell in which a solar cell is arranged on the back side of the dial, the appearance color may look different in the area where the solar cell exists and in the area where the solar cell does not exist, which may spoil the aesthetic appearance.

Patent Document 1 below describes a timepiece with a solar cell in which a shielding sheet that is opaque at least in a region where the solar cell is not arranged is provided on the front side or the back side of the solar cell.

Japanese Unexamined Patent Publication No. 2012-21189

In the timepiece with a solar cell described in Patent Document 1, by arranging a shielding sheet, it looks as if a cell also exists in the notch portion of the solar cell. With such a technique, the color difference between the region where the solar cell exists and the region where the solar cell does not exist is considerably eliminated. However, there are individual differences in the colors of the solar cells, it is difficult to match the colors of the solar cells and the shielding sheet exactly, and there is concern that the boundary between the area where the solar cell exists and the area where it does not exist will still be visible. Will be done.

Therefore, an object of the present invention is to provide a clock with a solar cell in which the visibility of the boundary between the region where the solar cell exists and the region where the solar cell does not exist is reduced.

The invention disclosed in the present application in order to solve the above problems has various aspects, and the outline of typical ones of these aspects is as follows.

(1) The dial has a dial and a solar cell arranged on a part of the back side of the dial, and further includes a shielding member that covers at least a region where the solar cell is not arranged in a plan view. The color of is darker than the color of the light receiving surface of the solar cell, a clock with a solar cell.

(2) In (1), the visual reflectance of the shielding member is smaller than the visual reflectance of the light receiving surface of the solar cell.

(3) In (1) or (2), the shielding member is a support frame provided under the solar cell, which is a clock with a solar cell.

According to the present invention, it is possible to obtain a clock with a solar cell in which the visibility of the boundary between the region where the solar cell exists and the region where the solar cell does not exist is reduced.

It is a top view which shows the satellite radio-controlled wristwatch which concerns on embodiment of this invention. It is a top view which shows the solar cell. It is a top view which shows the shielding member. It is a partial cross-sectional view of a satellite radio-controlled wristwatch. It is a partial cross-sectional view of the satellite radio-controlled wristwatch which concerns on the 1st modification. It is a partial cross-sectional view of the satellite radio-controlled wristwatch which concerns on the 2nd modification. It is a partial cross-sectional view of the satellite radio-controlled wristwatch which concerns on the 3rd modification. It is a partial cross-sectional view of the satellite radio-controlled wristwatch which concerns on the 4th modification. It is a partial cross-sectional view of the satellite radio-controlled wristwatch which concerns on the 5th modification. It is a top view which shows the satellite radio-wave wristwatch which concerns on the 6th modification.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing a satellite radio-controlled wristwatch 1 according to an embodiment of the present invention. In the figure, the body 10 which is the exterior (clock case) of the satellite radio-controlled wristwatch, the dial 14 arranged in the body 10, and the hour hand 15, the minute hand 16, and the second hand 17 which are pointers indicating the time are shown. Further, a crown 13 and a button 12 for the user to perform various operations are arranged on the side surface of the body 10 on the 3 o'clock side. Band fixing portions 11 for fixing the band extend from the side surfaces of the body 10 on the 12 o'clock side and the 6 o'clock side.

The design of the satellite radio-controlled wristwatch 1 shown in the figure is an example. In addition to the ones shown here, for example, the body 10 may be square instead of round, and the presence, number, and arrangement of the crown 13 and the buttons 12 are arbitrary. Further, in the present embodiment, the pointer has three pointers, the hour hand 15, the minute hand 16, and the second hand 17, but the present invention is not limited to this, and the second hand 17 may be omitted, or the day of the week, the presence or absence of time zone or summer time, and radio waves. You may add a guideline for displaying the reception status of the radio wave, the remaining battery level, various displays, a date display, and the like.

In this specification, the term satellite radio wristwatch is used as a wristwatch that receives a satellite signal from a satellite such as a GPS satellite that transmits a satellite signal including information on the date and time, and the date included in the satellite signal. And time information, that is, a wristwatch that has a function to correct the internal time, which is the time information held inside the wristwatch, based on the reference information. However, the present invention is not limited to satellite radio-controlled wristwatches, and may be applied to radio-controlled wristwatches that receive general standard radio waves and correct the internal time, or may be applied to wristwatches that do not have such a time-adjusting function. .. Further, it may be applied not only to a wristwatch but also to a table clock or a wall clock.

In the satellite radio-controlled wristwatch 1, a windshield made of a transparent material such as glass is attached to the body 10 so as to cover the dial 14. Further, on the opposite side of the windshield, a back cover is attached to the body 10. Hereinafter, in the present specification, the direction in which the windshield of the satellite radio-controlled wristwatch 1 is arranged (the direction toward the front of the paper in FIG. 1) is referred to as the front side, and the direction in which the back cover is arranged (the direction in the back of the paper in FIG. 1) is referred to as the back side.

A solar cell 30 is arranged on the back side of the dial 2, and power is generated by the light received from the front side. Therefore, the dial 14 is made of a material that transmits light rays to some extent. The details will be described later, but as shown in FIG. 2, the solar cell 30 has a substantially circular shape, and is cut out in a fan shape from the 10 o'clock direction to the 2 o'clock direction. Then, on the back side of the dial 14, a patch antenna 20 for receiving a satellite signal is arranged in this notched portion (region where the solar cell 30 does not exist). Further, as will be described in detail later, as shown in FIG. 4, the front surface of the patch antenna 20 is a receiving surface 20a for receiving radio waves from the satellite. The receiving surface 20a of the patch antenna 20, the light receiving surface of the solar cell 30, and the dial 14 are provided in parallel with each other, and all face the front side.

By the way, in a radio clock that adjusts the time using a standard radio wave transmitted from a ground station using a long wave band, a so-called bar antenna in which a coil is wound around a magnetic core such as ferrite or an amorphous alloy is generally used. There are many. On the other hand, the satellite radio-controlled wristwatch 1 according to the present embodiment receives a signal transmitted from the satellite using a UHF band having a much higher frequency. Therefore, the patch antenna 20 is used as a small antenna suitable for receiving UHF band signals. Since the satellite signal has a high frequency, if the electrodes of the solar cell 30 are arranged on the front side of the patch antenna 20, the reception sensitivity thereof is significantly lowered. Therefore, a cutout portion is formed in a part of the solar cell 30 as described above, and the patch antenna 20 is arranged there so that the electrode of the solar cell 30 is not arranged above the receiving surface 20a, that is, on the front side. There is. Instead of the patch antenna 20, a chip antenna or an inverted F antenna may be adopted.

In addition, inside the body 10 of the satellite radio wristwatch 1, a mechanism (movement) for driving a pointer, a storage battery for storing the electric power generated by the solar cell 30, and a controller for operating control of the satellite radio wristwatch 1. It houses a receiving circuit that processes the received satellite signal.

The dial 14 is wider than the opening on the front side of the body 10, and the body 10 covers the peripheral edge thereof. Therefore, in the dial 14, only the region (exposed region) inside the contour line (parting line) X of the opening of the body 10 can be seen from the outside through the windshield, and is outside the contour line X. The area (non-exposed area) is hidden by the body 10 and cannot be seen from the outside.

FIG. 2 is a plan view showing the solar cell 30 housed inside the body 10 of the satellite radio-controlled wristwatch 1. FIG. 3 is a plan view showing a shielding member 40 housed inside the body 10 of the satellite radio-controlled wristwatch 1. Further, FIG. 4 is a partial cross-sectional view of a satellite radio-controlled wristwatch 1 showing a region in which the solar cell 30 and the patch antenna 20 are adjacent to each other.

As shown in FIG. 2, the solar cell 30 includes a substrate 30b having a shape in which the 10 o'clock direction to the 2 o'clock direction are cut out in a fan shape. In the example shown in FIG. 2, the angle formed by the cutout portion 30c is 120 °. As described above, the patch antenna 20 is arranged in the inner region of the cutout portion 30c (the region where the solar cell 30 does not exist, referred to as the non-arranged region) so that the receiving surface 20a faces the windshield side. The angle formed by the cutout portion 30c may be any angle as long as the patch antenna 20 can be accommodated. However, as will be described later, it is preferable that the pattern provided on the dial 14 and the decorative member arranged on the dial 14 and the side of the cutout portion 30c overlap in a plan view. The area where the solar cell 30 does not exist is called a non-arranged area, whereas the area where the solar cell 30 exists is called an arranged area.

A plurality of engaging portions (concavo-convex shape) are provided on the peripheral edge of the substrate 30b at positions separated from each other, and these engaging portions are solar, which is a frame body (not shown) housed in the body 10 itself or inside the body 10. Engages in the cell support frame. As a result, the substrate 30b is non-rotatably supported in the satellite radio-controlled wristwatch 1. It should be noted that these engaging portions are formed outside the contour line X so that they cannot be seen through from the front side of the dial 14. Further, an opening for inserting the pointer shaft is formed in the center of the solar cell 30, and a plurality of cells 30a, which are power generation units having a semiconductor thin film and electrodes, are formed on the surface thereof.

The shielding member 40 is arranged on the back side of the solar cell 30 and shields the cutout portion 30c of the solar cell 30. The color of the shielding member 40 may be the color of the material (for example, resin) itself, or the surface of the colored member may be colored. This coloring may be a coating film with an arbitrary opaque paint, or may be a semiconductor layer obtained by removing the conductive layer that functions as an electrode from the layer constituting the cell 30a of the solar cell 30, and both of them are further laminated. You may do so. When the coloring is a coating film, the shielding member 40 is inexpensive and easy to manufacture, whereas when the coloring is a semiconductor layer, there is an advantage that the coloring and the color and texture of the cell 30a can be easily matched. A coating film may be further added to the coloring of the semiconductor layer for fine adjustment. The reason why the conductive layer is removed when the colored semiconductor layer is used is to prevent the patch antenna 20 from affecting the reception of radio waves from the satellite. When coloring is used as a semiconductor layer, a PIN layer (a layer of a PIN diode in which an I layer, which is an intrinsic semiconductor layer, is interposed between a P layer and an N layer) used as a semiconductor layer of the cell 30a is used. It may be used as a semiconductor layer, but instead, only either the I layer or the P layer or the N layer may be used as the semiconductor layer. This is because the shielding member 40 only needs to be similar in color and texture to the cell 30a, and does not need to function as the solar cell 30.

Since it is difficult for the color of the shielding member 40 to be the same as the color of the light receiving surface of the solar cell 30, it is desirable that the color is darker than the color of the light receiving surface of the solar cell 30. Specifically, it is desirable that the color of the shielding member 40 is darker than the color of the cell 30a or the substrate 30b. When the color of the shielding member 40 is darker than the color of the light receiving surface of the solar cell 30, the cells 30a or the substrate 30b are also present in the non-arranged region when viewed from the front side of the dial 14, as compared with the case where the color is not. Easy to look like. Here, the term "dark color" may mean, for example, that the lightness of a color is low when the Munsell color system is adopted as a method for expressing a color. Since it is desirable that the boundary between the shielding member 40 and the solar cell 30 is difficult to distinguish from the appearance, it is desirable that the hue and saturation of the shielding member 40 are close to the hue and saturation of the cell 30a or the substrate 30b. Further, as another example, when the CIExyY color system is adopted as the method for expressing the color, the dark color may mean that the value of the visual reflectance Y is small. When the CIExyY color system is adopted, it is desirable that the values of x and y of the shielding member 40 are close to the values of x and y of the cell 30a or the substrate 30b.

It is sufficient to color the shielding member 40 on the non-arranged region of the surface of the shielding member 40. However, by coloring the entire surface of the shielding member 40, the patch antenna 20 is shielded even if the positions of the shielding member 40 and the solar cell 30 are not precisely aligned. Therefore, when the entire surface of the shielding member 40 is colored, a clock 1 with a solar cell having reduced visibility of the boundary between the arranged region and the non-arranged region can be obtained by a simpler assembly process. Further, as another configuration of the shielding member 40, it is conceivable that the shielding member 40 is arranged on the front side of the solar cell 30 and only the region covering the non-arranged region of the sheet formed of the transparent member is colored. In this case, the shielding member 40 needs to be precisely aligned with the solar cell 30, which is not preferable.

A plurality of engaging portions (concavo-convex shape) are also provided on the peripheral edge of the shielding member 40 at positions separated from each other, and these engaging portions are housed in the body 10 itself or inside the body 10 (not shown). Is engaged in. As a result, the shielding member 40 is also non-rotatably supported in the satellite radio-controlled wristwatch 1. These engaging portions are also formed outside the contour line X.

In the present embodiment, the shielding member 40 is a single sheet, but the shielding member 40 does not have to be in the form of a sheet. For example, the solar cell 30 may be arranged on the solar cell support frame with the surface of the solar cell support frame, which is a frame housed inside the body 10, as a coating film surface or the like. In that case, the patch antenna 20 will be arranged on the back surface side or inside of the solar cell support frame. Even in such a case, the color of the surface of the solar cell support frame is made darker than the color of the light receiving surface of the solar cell 30, so that the cell 30a or the substrate 30b is also present in the non-arranged region. I can show you.

As shown in FIG. 4, a sheet 50 is arranged between the dial 14 and the solar cell 30. A matte layer 60 is provided on the surface of the sheet 50. In order to irradiate the light receiving surface of the solar cell 30 with external light, the sheet 50 and the matte layer 60 are formed of a material that transmits light rays to some extent.

The matte layer 60 is a layer that diffuses light by having an uneven surface on the front side. Here, since the sheet 50 has a thickness, the distance between the matte layer 60 and the light receiving surface of the solar cell 30 is maintained. Then, the light incident from the dial 14 side, reflected by the light receiving surface of the solar cell 30 and returned to the dial 14 side, and the light reflected by the surface of the shielding member 40 and returned to the dial 14 side are the matte layer. At 60, it becomes uniformly and irregularly diffused. Therefore, when observed from the dial 14 side, the boundary between the arranged area and the non-arranged area becomes unclear and the so-called Mach effect is suppressed, so that the color difference between the arranged area and the non-arranged area is almost visually recognized. It disappears.

On the other hand, if the matte layer 60 is formed on the back surface of the sheet 50 and the front surface of the cell 30a constituting the solar cell 30 and the matte layer 60 are in contact with each other without being separated from each other, the matte layer 60 is formed. There is a difference in the light scattering state of the matte layer 60 between the region where the 60 is in contact with the cell 30a and the region where the matte layer 60 is separated from the shielding member 40. Therefore, the scattered state of light is not uniform in both regions, and the color difference between the arranged region and the non-arranged region becomes conspicuous. This is because, in the region where the member contacts the back surface side of the matte layer 60, light is incident on the member from the convex portion on the back surface of the matte layer 60 without passing through a space, whereas light is incident on the back surface of the matte layer 60. In the region where the members do not touch, light is radiated into the space from the entire back surface of the matte layer 60, which causes a large difference in the light path between the two.

The matte layer 60 may be colored as long as it is a material that transmits the amount of light required for power generation of the solar cell 30. When the matte layer 60 is colored and transparent, it is desirable that the color of the matte layer 60 is blacker than that of the cells 30a and the substrate 30b. Here, the black color may mean that the saturation of the color is low, for example, when the Munsell color system is adopted as the method of expressing the color. Further, for example, when the CIExyY color system is adopted as a method for expressing a color, black means that the color is closer to the color represented by the points x = 1/3 and y = 1/3. It may be what you do. The points of x = 1/3 and y = 1/3 generally indicate that they are achromatic.

If the matte layer 60 is colored and transparent, the difference in color between the arranged region and the non-arranged region is further reduced when observed from the dial 14 side, and is visually recognized. That is, even when a difference in color or texture occurs between the solar cell 30 and the shielding member 40 due to individual differences in the solar cell 30, the difference between the two can be more perceived by looking through the common matte layer 60. It becomes difficult. It is desirable that the paint is not directly applied to the surface of the matte layer 60. This is because when the paint is applied to the surface of the matte layer 60, the concave portions of the uneven surface provided on the surface of the matte layer 60 are filled with the paint, depending on the optical characteristics such as the refractive index of the paint. This is because the light diffusion effect due to the uneven surface is reduced. When a colored layer is provided on the surface side of the matte layer 60 with paint, the paint is not applied directly to the matte layer 60, but is painted on the dial 14 side as in the third modification described later. This problem is solved by applying the above to form a colored layer. Further, in this embodiment, the matte layer 60 may be transparent and the sheet 50 may be colored transparent.

In the configuration in which the shielding member 40 is arranged on the back surface side of the solar cell 30 as in the present embodiment to facilitate the alignment of these members, there is a difference in height between the arranged region and the non-arranged region. Even with such a configuration, by forming the matte layer 60 on the surface of the sheet 50 and arranging the matte layer 60 away from the arranged region and the non-arranged region, the light diffusion effect is uniformly exhibited in these regions. The color differences in these areas can be made inconspicuous.

FIG. 5 is a partial cross-sectional view showing a region adjacent to the solar cell 30 and the patch antenna 20 in the satellite radio-controlled wristwatch 1 according to the first modification. In the first modification, the first matte layer 61 is provided on the back surface of the dial 14, and the second matte layer 62 is provided on the front surface of the sheet 50. An uneven surface is provided on the back surface of the first matte layer 61 and the front surface of the second matte layer 62, respectively. In this way, by forming the matte layer into two layers, the light incident from the dial 14 side and reflected by the light receiving surface of the solar cell 30 is more strongly diffused, and the arranged region and the non-arranged region become The visibility of the boundary is further reduced. In the first modification, either one of the first matte layer 61 and the second matte layer 62 may be colored transparent, or both may be colored transparent. Further, the second matte layer 62 may not be provided and only the first matte layer 61 may be provided.

FIG. 6 is a partial cross-sectional view showing a region adjacent to the solar cell 30 and the patch antenna 20 in the satellite radio-controlled wristwatch 1 according to the second modification. The first matte layer 61 in the second modification is formed by laminating the first colored layer 61a and the first matte layer 61b on the back surface of the dial 14 in this order. Further, the second matte layer 62 is formed by laminating a second colored layer 62a and a second matte layer 62b on the surface of the sheet 50 in this order. Here, the first matte layer 61b and the second matte layer 62b are provided so as to face each other, and the uneven surfaces are arranged so as to face each other. That is, the back surface of the first matte layer 61b and the front surface of the second matte layer 62b are uneven surfaces. The first colored layer 61a and the second colored layer 62a are colored transparent layers, and may be a coating film having a thickness and color sufficient to transmit light rays. Further, the first matte layer 61b and the second matte layer 62b may be transparent. In the case of the second modification, the transmittance of the first matte layer 61 and the second matte layer 62 can be adjusted by adjusting the thickness and color of the first colored layer 61a and the second colored layer 62a. .. Therefore, there is an advantage that a desired transmittance can be obtained without precisely adjusting the thicknesses of the first matte layer 61b and the second matte layer 62b. Either one of the first matte layer 61 and the second matte layer 62 may be provided.

If the first matte layer 61b and the first colored layer 61a are formed directly on the surface of the second matte layer 62b, the concave portion of the uneven surface provided on the surface of the second matte layer 62b becomes the first matte. By filling with the layer 61b and further filling the concave portion of the uneven surface provided on the surface of the first matte layer 61b with the first colored layer 61a, the light diffusion effect of these matte layers is reduced. Become. On the other hand, as shown in FIG. 6, by forming these layers on the front surface of the sheet 50 and the back surface of the dial 14 and facing each other, the surface of each matte layer maintains unevenness and diffuses light. The effect does not decrease. Then, by forming the first matte layer 61b on the back surface of the dial 14, it is possible to form an uneven pattern on the glossy surface on the surface of the dial 10 as shown in FIG.

FIG. 7 is a partial cross-sectional view showing a region adjacent to the solar cell 30 and the patch antenna 20 in the satellite radio-controlled wristwatch 1 according to the third modification. In the third modification, the colored layer 63 is provided on the back surface of the dial 14, and the transparent matte layer 64 is provided on the front surface of the sheet 50. The colored layer 63 is a colored transparent layer, and may be a coating film having a thickness and color sufficient to transmit light rays. In the third modification, the transmittance of light incident from the dial 14 side can be adjusted by adjusting the thickness and color of the colored layer 63. Therefore, the color of the light receiving surface of the solar cell 30 and the lightness of the color of the shielding member 40, which are visible on the dial 14 side, can be adjusted by the thickness and color of the colored layer 63. Further, the transparent matte layer 64 can uniformly and irregularly diffuse the light incident from the dial 14 side and the light reflected by the light receiving surface of the solar cell 30 and returned to the dial 14 side. Therefore, the visibility of the boundary between the arranged area and the non-arranged area is lowered. A transparent matte layer 64 may be provided on the back surface of the dial 14, and a colored layer 63 may be provided on the surface of the sheet 50. A colored layer 63 may be provided on the surface of the sheet 50, and the surface of the colored layer 63 may be glossy. An erasing layer 64 may be provided.

FIG. 8 is a partial cross-sectional view showing a region adjacent to the solar cell 30 and the patch antenna 20 in the satellite radio-controlled wristwatch 1 according to the fourth modification. In the fourth modification, the matte surface 65 is provided on the surface of the colored sheet 51. The matte surface 65 is composed of a rough surface on which fine irregularities are directly formed on the surface of the colored sheet 51. Due to the thickness of the colored sheet 51, the matte surface 65 is provided apart from the light receiving surface of the solar cell 30. The matte surface 65 is an uneven surface, and uniformly and irregularly diffuses the light incident from the dial 14 side and the light reflected by the light receiving surface of the solar cell 30 and returned to the dial 14 side. Therefore, the visibility of the boundary between the arranged area and the non-arranged area is lowered. The colored sheet 51 is a sheet made of a colored transparent material, and its transmittance is lower than that of the dial 14. In the fourth modification, the transmittance of light incident from the dial 14 side can be adjusted by adjusting the thickness and color of the colored sheet 51. Therefore, the color of the light receiving surface of the solar cell 30 and the lightness of the color of the shielding member 40, which are visually recognized on the dial 14 side, can be adjusted by the thickness and color of the colored sheet 51. The matte surface 65 may be formed of the matte layer shown in FIG. 4 or the like.

FIG. 9 is a partial cross-sectional view showing a region adjacent to the solar cell 30 and the patch antenna 20 in the satellite radio-controlled wristwatch 1 according to the fifth modification. The thickness of the dial 14 in the fifth modification is w1, and the thickness of the sheet 50 is w2. Here, w1 <w2, and the sheet 50 according to the fifth modification is thicker than the dial 14. In general, the total thickness of parts that can be placed inside the body of a wristwatch is limited by the thickness of the body. Most of the space inside the body is occupied by the movement, storage battery, patch antenna, receiving circuit, and the like. As a result, the total thickness of the dial 14 and the sheet 50 may be limited to about several hundred μm. Here, the light incident from the dial 14 side, reflected by the light receiving surface of the solar cell 30 and returned to the dial 14 side, and the light reflected by the surface of the shielding member 40 and returned to the dial 14 side are more strongly scattered. In order to achieve this, it is necessary to take a large distance from the uneven surface of the matte layer 60 to the light receiving surface of the solar cell 30. In the fifth example, the distance from the matte layer 60 to the light receiving surface of the solar cell 30 can be increased by making the thickness of the sheet 50 thicker than the thickness of the dial 14. As a result, even when the total thickness (approximately w1 + w2) of the dial 14 and the sheet 50 is limited to a predetermined value, the visibility of the boundary between the arranged region and the non-arranged region is reduced.

The matte layer 60 and the like may be formed by a layer containing fine particles that reflect or refract light. For example, a layer containing spherical transparent fine particles can be used as the matte layer 60. Even in that case, the light incident from the dial 14 side is uniformly and irregularly scattered by the matte layer 60 and the like, reflected by the light receiving surface of the solar cell 30, and returned to the dial 14 side. The light reflected on the surface of the shielding member 40 and returned to the dial 14 side is also uniformly and irregularly scattered by the matte layer 60 and the like. Regardless of the structure of the matte layer 60 or the like, if the incident light is uniformly and irregularly scattered, the visibility of the boundary between the arranged region and the non-arranged region is lowered.

FIG. 10 is a plan view showing the satellite radio-controlled wristwatch 1 according to the sixth modification. The surface of the dial 14 according to the sixth modification is provided with an uneven pattern 70 that radiates around the rotation axis of the pointer. A part of the uneven pattern 70 is formed along the boundary between the region where the solar cell 30 exists and the region where the solar cell 30 does not exist in a plan view. Further, in the satellite radio-controlled wristwatch 1 according to the sixth modification, a decorative member 80 is provided on the dial 14. The decorative member 80 may be directly attached to the dial 14, or may be fixed so as to be sandwiched together with the dial 14 by the body 10. The decorative member 80 is provided with a decorative member pattern 82 that overlaps with radiation centered on the rotation axis of the pointer. A part of the decorative member pattern 82 is formed along a line extending the boundary between the region where the solar cell 30 exists and the region where the solar cell 30 does not exist in a plan view.

The uneven pattern 70 is formed along the boundary between the region where the solar cell 30 exists and the region where the solar cell 30 does not exist in a plan view, so that it is difficult to visually recognize the difference between the color of the arranged region and the color of the non-arranged region. It exerts the illusion effect of doing. In particular, among the uneven patterns 70 in this example, the pattern extending in the 10 o'clock direction from the rotation axis of the pointer and the pattern extending in the 2 o'clock direction from the rotation axis of the pointer are the arrangement area and the non-arrangement area in a plan view. It overlaps the boundary. Such a pattern covers the boundary between the shielding member 40 and the solar cell 30, and has the greatest illusion effect of making the color difference between the shielding member 40 and the solar cell 30 small and visible. The interval at which the uneven pattern 70 is formed may be different from the example shown in FIG. Further, when the cutout portion 30c of the solar cell 30 has a shape other than the fan shape, an uneven pattern along the shape may be formed on the surface of the dial 14. It is desirable that the uneven pattern 70 is formed on the glossy surface on the front side of the dial 14 which easily reflects light, unlike the matte layer 60. In that case, the lines of light are visually recognized in a radial pattern, and an optical illusion effect is exhibited in which the color difference between the shielding member 40 and the solar cell 30 is made small.

The decorative member pattern 82 is formed so as to overlap the extension line of the boundary between the region where the solar cell 30 exists and the region where the solar cell 30 does not exist in a plan view, so that the color of the arrangement region and the color of the non-arrangement region can be matched. It has an optical illusion effect that makes it difficult to see the difference. In particular, among the decorative member patterns 82 in this example, the pattern formed in the 10 o'clock direction and the pattern formed in the 2 o'clock direction exert a large optical illusion effect. Further, when the decorative member pattern 82 is formed so as to overlap the extension line of the uneven pattern 70 formed on the surface of the dial 14, a stronger illusion effect is exhibited. The uneven pattern 70 and the decorative member pattern 82 are visually recognized as a single line covering the boundary between the shielding member 40 and the solar cell 30, and the color difference between the shielding member 40 and the solar cell 30 is illusioned to be smaller. Is. The decorative member pattern 82 may be formed by a three-dimensional shape. For example, a pattern may be formed by providing a periodic step in the circumferential direction of the decorative member 80.

Further, when the decorative member 80 is not provided on the dial 14 and the solar cell 30 is located near the inner circumference of the bezel and the solar cell 30 and the bezel are close to each other, the surface of the bezel is the same as the decorative member pattern 82. A pattern may be provided and the bezel may be used as a decorative member so that the color difference between the shielding member 40 and the solar cell 30 can be made small and visible. Further, the decorative member 80 may be provided on the dial 14, and a pattern similar to the decorative member pattern 82 may be provided on the surface of the bezel. In that case, both the decorative member pattern 82 and the pattern provided on the surface of the bezel are formed so as to overlap the extension line of the boundary between the region where the solar cell 30 exists and the region where the solar cell 30 does not exist, and the shielding member 40 and the solar cell 30 are formed. It is desirable to make the difference in color between the two and the other smaller.

The cutout portion 30c of the solar cell 30 according to the present embodiment has a fan shape as shown in FIG. 2, and the angle formed by the cutout portion 30c is 120 ° as an example. In the state where the solar cell 30 is arranged inside the body 10, the side of the cutout portion 30c extends in the 10 o'clock direction and the 2 o'clock direction. Therefore, for example, when the satellite radio-controlled wristwatch 1 is listed in a catalog or displayed in a store, the hour hand 15 and the minute hand 16 are set by adjusting the pointer to the position of 10:09:35 as shown in FIG. Can be superimposed on the boundary between the region where the solar cell 30 exists and the region where the solar cell 30 does not exist. Therefore, in the exhibition state, the pointer can be superimposed on the boundary between the shielding member 40 and the solar cell 30, and it is possible to make it difficult to visually recognize the difference between the color of the arranged region and the color of the non-arranged region. In general, a wristwatch has a notch 30c centered on the 12 o'clock position because the clock is often published or exhibited in a catalog at a position where the hands of the clock indicate the vicinity of 10: 8 to 9 o'clock. By forming the forming angle to about 120 °, it is possible to make it difficult to visually recognize the difference between the color of the arranged region and the color of the non-arranged region.

1 satellite radio watch, 10 body, 11 band fixing part, 12 button, 13 crown, 14 dial, 15 hour hand, 16 minute hand, 17 second hand, 20 patch antenna, 20a receiving surface, 30 solar cell, 30a cell, 30b board, 30c notch, 40 shielding member, 50 sheet, 51 colored sheet, 60 matte layer, 61 first matte layer, 61a
1st colored layer, 61b 1st matte layer, 62 2nd matte layer, 62a 2nd colored layer, 62b 2nd matte layer, 63 colored layer, 64 transparent matte layer, 65 matte surface, 70 uneven pattern , 80 decorative member, 82 decorative member pattern.

Claims (3)

Dial and
It has a solar cell, which is arranged on a part of the back side of the dial.
Further provided, a shielding member arranged on the back side of the solar cell and covering at least a non-arranged area in which the solar cell is not arranged in a plan view
The color of the shielding member, darker than the color of the light receiving surface of the solar cell,
Clock with solar cell. The visual reflectance of the shielding member is smaller than the visual reflectance of the light receiving surface of the solar cell.
The clock with a solar cell according to claim 1. The shielding member is a support frame provided under the solar cell.
The clock with a solar cell according to claim 1 or 2.

Images