Cover structure, watch, and method for manufacturing the cover structure

Abstract

To provide a cover structure that allows members to be aligned accurately and prevents internal structure from being seen easily, a timepiece having it, and a manufacturing method of the cover structure.SOLUTION: A cover structure has: timepiece glass 8 that is a cover member for at least transmitting visible light and has at least one first aligning mark section 13 for absorbing visible light; a semi-light transmission layer 14 that is provided in the first aligning mark section 13 and the forth, is provided continuously around the first aligning mark section 13 in a plan view from an upper part, transmits light in a partial wavelength region of visible light, and absorbs light in the other wavelength regions of visible light; and a solar panel 9 that is provided below the semi-light transmission layer 14, and is a covered member having at least one second aligning mark section 15 for transmitting visible light in a position covered with the first aligning mark section 13 in a plan view from above.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a cover structure used in electronic devices such as watches and instruments, a watch equipped with the same, and a method for manufacturing the cover structure. [Background technology]

[0002] For example, in the case of a wristwatch, as described in Patent Document 1, a watch crystal is provided at the upper opening of the watch case, a transparent dial is placed below this crystal, and a watch movement and solar panel are arranged in parallel below this dial. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-69626

[0004] In such wristwatches, to prevent the watch movement from being visible through the transparent dial, a light-blocking sticker is attached directly to the top surface of the watch movement, which is located on the inner periphery of the solar panel. Summary of the Invention [Problem to be solved by the invention]

[0005] However, with such wristwatches, when the light-blocking sticker is directly attached to the watch movement, it is difficult to align the light-blocking sticker with the watch movement, and once attached, it is difficult to correct the positioning.

[0006] The problem that this invention aims to solve is to provide a cover structure that allows components to be accurately aligned and makes the internal structure difficult to see, a watch equipped with the cover structure, and a method for manufacturing the cover structure. [Means for solving the problem]

[0007] The present invention is a cover structure comprising: a cover member that is transparent to at least visible light and has at least one first alignment mark portion that absorbs visible light; a semi-transparent layer that is provided below the first alignment mark portion and is provided continuously around the first alignment mark portion in a planar view from a certain direction, and that transmits light in a certain wavelength range of visible light and absorbs light in other wavelength ranges of visible light; and a covered member that is provided below the semi-transparent layer and has at least one second alignment mark portion that transmits visible light in a position that is covered by the first alignment mark portion in a planar view from the certain direction. [Effects of the Invention]

[0008] According to this invention, it is possible to accurately align the components with each other and to make the internal structure less visible. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is an enlarged plan view showing an embodiment of a wristwatch to which the present invention is applied. [Figure 2] 2 is an enlarged cross-sectional view showing the main parts of the wristwatch shown in FIG. 1 taken along the line AA. [Figure 3] 3 is an enlarged cross-sectional view of part B of the glass structure shown in FIG. 2. FIG. [Figure 4] 2 is an enlarged plan view of the glass structure shown in FIG. 1, viewed from above. FIG. [Figure 5] 5 is an enlarged plan view showing the watch glass provided with a function display portion, a light absorbing layer, and a first alignment mark portion in the glass structure shown in FIG. 4. FIG. [Figure 6] 5 is an enlarged plan view showing a semi-light-transmitting layer provided on the underside of the crystal shown in FIG. 4. FIG. [Figure 7] 5 is an enlarged plan view showing a solar panel attached to the underside of the crystal of FIG. 4. FIG. [Figure 8]5A and 5B show the main parts of the glass structure shown in FIG. 4, where (a) is an enlarged view showing the alignment part at part C on the 9 o'clock side of FIG. 4, and (b) is an enlarged view showing the alignment part at part D on the 3 o'clock side of FIG. 4. [Figure 9] This shows the state in which the second alignment mark portion is misaligned with respect to the first alignment mark portion in the alignment state shown in Figure 8, where (a) is an enlarged view showing the misalignment of the alignment portion on the 9 o'clock side, and (b) is an enlarged view showing the misalignment of the alignment portion on the 3 o'clock side. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of a wristwatch to which the present invention is applied will now be described with reference to FIGS. 1 and 2, this wristwatch has a wristwatch case 1. This wristwatch case 1 has a case body 2, a first exterior member 3, and a second exterior member 4.

[0011] As shown in Figures 1 and 2, the case body 2 is made of metal such as stainless steel or a highly rigid synthetic resin. The first exterior member 3 is attached to the upper outer periphery of the case body 2 and is made of a resilient synthetic resin such as urethane resin. The second exterior member 4 protects the 9 o'clock and 3 o'clock sides of the first exterior member 3 and is made of a metal such as stainless steel.

[0012] As shown in Fig. 1, push button switches 5 are provided at the 2 o'clock, 4 o'clock, 8 o'clock, 9 o'clock, and 10 o'clock sides of this wristwatch case 1. A glass structure 6, which serves as a cover structure, is provided at the upper opening of this wristwatch case 1, i.e., at the top of the case body 2, as shown in Fig. 2. A back cover 7 is attached to the bottom of the wristwatch case 1, i.e., the bottom of the case body 2, via a waterproof packing 7a. A watch module (not shown) is provided inside this wristwatch case 1.

[0013] As shown in Figures 2 and 3, the glass structure 6 comprises a crystal 8, which is a cover member, and a solar panel 9, which is a covered member. This glass structure 6 has a structure in which the solar panel 9 is attached to the underside of the crystal 8 with transparent double-sided adhesive tape 10 (which transmits almost all light with wavelengths across the entire visible light range). In this case, the crystal 8 is a transparent glass plate that transmits at least visible light (which transmits almost all light with wavelengths across the entire visible light range), and is formed in an approximately circular shape. The outer periphery of this crystal 8 is positioned on the upper outer periphery of the case body 2 and fixed with adhesive 11.

[0014] In this case, the solar panel 9 is made of a semiconductor material, such as a silicon-based material such as monocrystalline silicon or polycrystalline silicon, or a gallium-based material. Generally, solar panels have cells in colors that are relatively close to black, such as black, gray close to black, dark blue, or dark purple. The solar panel 9 of this embodiment is gray close to black.

[0015] As shown in FIGS. 4 and 5 , a light-absorbing layer 12 that absorbs visible light is silk-screened and formed in a substantially annular shape on the outer periphery of the underside of the crystal 8. For convenience, the outer diameter of the substantially annular light-absorbing layer 12 in a planar view from above is referred to as the outer diameter, and the inner diameter is referred to as the inner diameter. The inner diameter is defined as the length of the inner diameter of the light-absorbing layer 12 when there are no irregularities, such as the notch 12a and the first alignment mark 13 (described later). (The same applies to the semi-transparent layer 14, described later). The light-absorbing layer 12 is, for example, a black layer. The light-absorbing layer 12 has an outer diameter approximately the same as that of the crystal 8 and an inner diameter approximately the same as that of the solar panel 9, or an inner diameter that is smaller than or equal to the outer diameter of the solar panel 9 but larger than the inner diameter of the solar panel 9. A function indicator 8a indicating the timepiece functions is formed in a substantially arc-shaped shape along the outer periphery of the solar panel 9 on the underside of the crystal 8, located inside the light-absorbing layer 12. In order to increase the amount of light received by the solar panel 9, it is desirable that the function display portion 8a be printed with light-transmitting ink.

[0016] As shown in Figures 8(a) and 8(b), semicircular cutouts 12a are provided on the 9 o'clock and 3 o'clock sides of the light-absorbing layer 12, respectively, and are open to the inner periphery of the light-absorbing layer 12. For convenience, the inner diameter of the semicircular cutouts 12a refers to the diameter of a circle formed by extending the semicircular arc in a plan view from above (the same applies to the outer diameter of the cover portion 14a, described below). First alignment mark portions 13 are provided by silk printing on the underside of the crystal 8 located within each of the cutouts 12a on the 9 o'clock and 3 o'clock sides of the light-absorbing layer 12. Each of these first alignment mark portions 13 is a layer that absorbs visible light and is formed in a substantially circular shape with an outer diameter smaller than the inner diameter of the respective cutouts 12a.

[0017] 8(a) and 8(b), each of these first alignment mark portions 13 is formed with an outer diameter that is approximately the same as the radius of the cutout portion 12a. The centers of these first alignment mark portions 13 are provided so as to correspond to the centers of the cutout portions 12a on the 9 o'clock and 3 o'clock sides of the light absorbing layer 12. As a result, each of the first alignment mark portions 13 is provided with a gap S1 between its outer periphery and the inner periphery of the cutout portions 12a on the 9 o'clock and 3 o'clock sides of the light absorbing layer 12.

[0018] In this case, the light absorbing layer 12 may extend into part of the gap S1 between the first alignment mark portion 13 and the light absorbing layer 12. For example, by extending a plurality of straight lines from part of the inner periphery of the light absorbing layer 12 to the first alignment mark portion 13, alignment can be performed via the semi-light transmitting layer 14, and the gap S1 is hidden as much as possible by the light absorbing layer 12 in black.

[0019] 8(a) and 8(b), the light absorbing layer 12 is provided avoiding the first alignment mark portion 13 so as not to contact or overlap the first alignment mark portion 13. The first alignment mark portion 13 is provided on the inner periphery, i.e., on the inner periphery, of the light absorbing layer 12, and part of its outer periphery protrudes from the cutout portion 12a of the light absorbing layer 12 inward beyond the inner periphery of the light absorbing layer 12.

[0020] 3 and 6, a semi-light-transmitting layer 14 that transmits visible light is provided in a substantially annular shape by medium printing below the light-absorbing layer 12 and the first alignment mark portion 13. This semi-light-transmitting layer 14 is a semi-transparent layer that improves adhesion to the case body 2, the light-absorbing layer 12, and the first alignment mark portion 13, and is colored with, for example, a black coloring material.

[0021] The semi-light-transmitting layer 14 does not have 100% transmittance for all wavelengths in the visible light band, but rather absorbs at least some wavelengths, such as blue wavelengths (400-500 nm), red wavelengths (650-750 nm), and green wavelengths (500-550 nm). The semi-light-transmitting layer 14 of this embodiment is a layer that transmits light of all wavelengths in the visible light band to the same extent. Furthermore, the term "semi-light-transmitting" is used for convenience and does not refer to a light transmittance of 50%, as will be described later. The semi-light-transmitting layer 14 is formed so that its inner diameter is approximately the same as that of the light-absorbing layer 12 and its outer diameter is slightly smaller than that of the light-absorbing layer 12.

[0022] 6 and 8, covering portions 14a are provided on the 9 o'clock and 3 o'clock sides of the semi-light-transmitting layer 14, respectively, to cover each of the cutout portions 12a of the light-absorbing layer 12 from below together with the first alignment mark portions 13. These covering portions 14a are formed in a roughly semicircular shape with an outer diameter slightly larger than the inner diameter of the cutout portions 12a of the light-absorbing layer 12. Therefore, the covering portions 14a are smoke portions that transmit a certain amount of visible light to provide a smoke (blindness) effect, and are provided so as to protrude in a semicircular shape from the inner periphery of the semi-light-transmitting layer 14 while overlapping the periphery of the cutout portions 12a.

[0023] 8(a) and 8(b), the cover portion 14a transmits visible light to a certain extent at a location corresponding to the gap S1 between the outer periphery of the first alignment mark portion 13 and the inner periphery of the notch portion 12a, and at a location adjacent to and corresponding to the outer periphery of the first alignment mark portion 13 located on the inner periphery of the light absorbing layer 12 (i.e., at a location continuous with the peripheries of the light absorbing layer 12 and the first alignment mark portion 13). In this case, the light transmittance of the semi-light-transmitting layer 14 and the cover portion 14a is 5% to 15%, and preferably 10%.

[0024] Furthermore, the light transmittance of each of the light absorbing layer 12 and the first alignment mark portion 13 is set lower than that of the semi-light transmitting layer 14 and the covering portion 14a. That is, when the light transmittance of the semi-light transmitting layer 14 and the covering portion 14a is about 10%, the light transmittance of each of the light absorbing layer 12 and the first alignment mark portion 13 is 0% to 5%, and preferably 0% (no visible light passes through).

[0025] 4 and 7, the solar panel 9 attached to the underside of the crystal 8 is formed in a substantially annular shape with an outer diameter approximately the same as the inner diameter of the light absorbing layer 12, or larger than the inner diameter of the light absorbing layer 12 but smaller than the arrangement area of ​​the function display unit 8a of the crystal 8. This solar panel 9 receives external light that has passed through the crystal 8 and generates electromotive force, and has multiple cells 9a arranged in a ring. The multiple cells 9a of this solar panel 9 are connected by connection wiring 9b provided on the outer periphery, and are electrically connected to a watch module (not shown) inside the watch case 1.

[0026] 7 and 8, second alignment mark portions 15 covered by first alignment mark portions 13 are provided on the outer periphery of each of the 9 o'clock and 3 o'clock sides of this solar panel 9. Each of these second alignment mark portions 15 is a circular through-hole that penetrates the top and bottom surfaces of the solar panel 9, as shown in FIG. 3, and its outer diameter is smaller than the outer diameter of the first alignment mark portion 13.

[0027] As a result, as shown in Figures 8(a) and 8(b), visible light is irradiated from the underside of the solar panel 9 toward the second alignment mark portion 15, and the irradiated visible light is irradiated onto the covering portion 14a of the semi-light-transmitting layer 14 through the through hole of the second alignment mark portion 15, and part of this irradiated visible light passes through the covering portion 14a of the semi-light-transmitting layer 14 and is irradiated onto the first alignment mark portion 13, and when this irradiated visible light is almost completely absorbed by the first alignment mark portion 13, it is detected that the solar panel 9 is accurately aligned with the underside of the watch crystal 8.

[0028] Furthermore, in this glass structure 6, visible light irradiated from the underside of the solar panel 9 toward the second alignment mark portion 15 is not completely absorbed by the first alignment mark portion 13, and as shown in Figures 9(a) and 9(b), the visible light leaks above the first alignment mark portion 13.If this leaked visible light is visible from above the watch crystal 8, it is detected that the second alignment mark portion 15 is misaligned with the first alignment mark portion 13.

[0029] In this embodiment, as shown in Figures 9(a) and 9(b), it is not permitted for the second alignment mark portion 15 of the glass structure 6 to be misaligned with and protrude from the first alignment mark portion 13. In this embodiment, the areas to be smoked (concealed) are those visible through the gap S1, i.e., between the light absorbing layer 12 and the solar panel 9 (or the first alignment mark portion 13). These areas are concealed so as to be difficult to see by the semi-transmitting, or smoked, covering portion 14a of the semi-transmitting layer 14.

[0030] As a result, the glass structure 6 is hidden by the covering portion 14a of the semi-light-transmitting layer 14 so that the watch module (not shown) inside the watch case 1 cannot be seen from the outside through the area that is to be smoked (blindded) and visible through the gap S1. Furthermore, by having the light-absorbing layer 12, the first alignment mark portion 13, the semi-light-transmitting layer 14, and the solar panel 9 all be the same color, the watch module (not shown) inside the watch case 1 is further hidden so that it is difficult to see from the outside. Note that in this embodiment, "similar colors" refers to black or colors close to black (gray close to black, dark blue, dark purple), etc. However, if the color of the solar panel 9 is close to blue, for example, the light-absorbing layer 12, the first alignment mark portion 13, and the semi-light-transmitting layer 14 may be made closer to blue.

[0031] Next, a method for manufacturing such a watch crystal structure 6 will be described. This manufacturing method includes a first step of providing a first alignment mark portion 13 and a semi-light-transmitting layer 14 on the underside of the watch crystal 8, a second step of providing a second alignment mark portion 15 on the solar panel 9, a third step of irradiating visible light from below the solar panel 9 to detect the alignment between the second alignment mark portion 15 and the first alignment mark portion 13, and a fourth step of attaching the aligned solar panel 9 to the watch crystal 8.

[0032] In the first step, the light absorbing layer 12 and the first alignment mark portion 13 are first silk-screen printed on the underside of the crystal 8. In this case, the light absorbing layer 12 is formed in a substantially annular shape around the peripheral edge of the underside of the crystal 8. At this time, semicircular cutout portions 12a are provided on the 9 o'clock and 3 o'clock sides of the light absorbing layer 12, and the first alignment mark portion 13 is provided within each of these cutout portions 12a.

[0033] In this case, the first alignment mark portion 13 is formed in a circular shape whose area is smaller than the area of ​​the cutout portion 12a, and a gap S1 is provided between the outer periphery of the first alignment mark portion 13 and the inner periphery of the cutout portion 12a. Also, a part of the outer periphery of the first alignment mark portion 13, i.e., the outer periphery edge located on the inner periphery side of the light absorbing layer 12, is provided so as to protrude from the cutout portion 12a toward the inner periphery side of the light absorbing layer 12.

[0034] In this first step, a semi-transparent layer 14 is formed by medium printing on the underside of the crystal 8, including the light-absorbing layer 12 and the first alignment mark 13. This semi-transparent layer 14 transmits a certain amount of visible light, and has cover portions 14a on the 9 o'clock and 3 o'clock sides. These cover portions 14a protrude in a semicircular shape from the inner periphery of the semi-transparent layer 14, overlapping the periphery of the cutout 12a.

[0035] As a result, as shown in Figures 8(a) and 8(b), the covering portion 14a allows a certain amount of visible light to pass through while covering the area corresponding to the gap S1 between the outer periphery of the first alignment mark portion 13 and the inner periphery of the cutout portion 12a, and the adjacent area corresponding to the outer edge around the first alignment mark portion 13 located on the inner periphery of the light absorption layer 12.

[0036] In the second step, second alignment mark portions 15 are provided on the 9 o'clock and 3 o'clock sides of solar panel 9. These second alignment mark portions 15 are through holes that transmit light, and are formed with an inner diameter that is smaller than the outer diameter of first alignment mark portion 13. As a result, when second alignment mark portion 15 is positioned corresponding to the underside of first alignment mark portion 13, it is covered by first alignment mark portion 13.

[0037] In the third step, visible light is irradiated from below the solar panel 9 toward the watch crystal 8 to detect the alignment between the second alignment mark portion 15 of the solar panel 9 and the first alignment mark portion 13 of the watch crystal 8. In this case, when visible light is irradiated from below the solar panel 9 toward the second alignment mark portion 15, the irradiated visible light passes through the through-hole of the second alignment mark portion 15 and is irradiated onto the cover portion 14a of the semi-light-transmitting layer 14, and part of this irradiated visible light passes through the cover portion 14a of the semi-light-transmitting layer 14 and is irradiated onto the first alignment mark portion 13.

[0038] If the irradiated visible light is almost completely absorbed by the first alignment mark portion 13 at this time, it is detected that the solar panel 9 is accurately aligned with the underside of the crystal 8. If the visible light irradiated from below the solar panel 9 toward the second alignment mark portion 15 is not completely absorbed by the first alignment mark portion 13, and the visible light leaks above the first alignment mark portion 13 as shown in Figures 9(a) and 9(b), and this leaked visible light is visible from above the crystal 8, it is detected that the second alignment mark portion 15 is misaligned with the first alignment mark portion 13.

[0039] In this embodiment, as shown in Figures 9(a) and 9(b), it is not acceptable for the second alignment mark portion 15 of the glass structure 6 to be misaligned with and protrude from the first alignment mark portion 13. For this reason, in this embodiment, the areas that need to be smoked (concealed) are those visible through the gap S1, i.e., the area between the light absorbing layer 12 and the solar panel 9 (or the first alignment mark portion 13). In particular, when this area is viewed from an oblique angle, the internal structure of the watch module (not shown) and other components inside the watch case 1 are visible. According to this embodiment, these areas are concealed so that they are difficult to see by the semi-transmitting, or smoked, covering portion 14a of the semi-transmitting layer 14.

[0040] In the fourth step, the aligned solar panel 9 is attached to the crystal 8 with transparent double-sided adhesive tape 10. That is, with the second alignment mark portion 15 of the solar panel 9 aligned with the first alignment mark portion 13 of the crystal 8, the solar panel 9 is attached to the underside of the crystal 8 with transparent double-sided adhesive tape 10. This allows the solar panel 9 to receive external light through the transparent double-sided adhesive tape 10. In this way, the glass structure 6 is manufactured.

[0041] In the glass structure 6 manufactured in this manner, as shown in Fig. 3, the crystal 8 is placed on the upper outer periphery of the case body 2 and fixed with adhesive 11. In this state, when the first exterior member 3 is attached to the upper outer periphery of the case body 2 as shown in Fig. 2, the outer periphery of the upper surface of the crystal 8 is pressed down by the second exterior member 4.

[0042] Then, the second exterior member 4 is attached to the 3 o'clock and 9 o'clock sides of the first exterior member 3. This completes the assembly of the wristwatch case 1. A watch module (not shown) is placed inside this wristwatch case 1, and in this state the back cover 7 is attached to the bottom of the wristwatch case 1 together with waterproof packing 7a. This completes the assembly of the wristwatch.

[0043] Thus, the watch glass structure 6 comprises a watch crystal 8, which is a cover member that transmits at least visible light and is provided with at least one first alignment mark portion 13 that absorbs visible light; a semi-transparent layer 14 that is provided below the first alignment mark portion 13 and is provided continuously around the first alignment mark portion 13 when viewed in a plan view from above in a certain direction, and that transmits light in a certain wavelength range of visible light and absorbs light in other wavelength ranges of visible light; and a solar panel 9, which is a covered member that is provided below the semi-transparent layer 14 and is provided with at least one second alignment mark portion 15 that transmits visible light in a position covered by the first alignment mark portion 13 when viewed in a plan view from above.This makes it possible to accurately align the watch crystal 8 and the solar panel 9 while making it difficult to see the internal structure.

[0044] In other words, in the glass structure 6 of this wristwatch, when visible light is irradiated from the underside of the solar panel 9 toward the second alignment mark portion 15, some of the visible light that passes through the second alignment mark portion 15 (through hole) passes through the covering portion 14a of the semi-light-transmitting layer 14 and is irradiated onto the first alignment mark portion 13, and this irradiated visible light is almost completely absorbed by the first alignment mark portion 13, making it possible to detect that the solar panel 9 is accurately aligned with the underside of the watch crystal 8.

[0045] Furthermore, in the glass structure 6 of this wristwatch, the watch crystal 8 has an approximately annular light-absorbing layer 12 that absorbs visible light at least at the peripheral edge of the watch crystal 8 that is visible in a planar view from above, so that external light that passes through the watch crystal 8 can be absorbed by the light-absorbing layer 12, thereby preventing external light from entering from the outer periphery of the watch crystal 8, and making it difficult to see the underside of the peripheral edge of the watch crystal 8 from the outside.

[0046] Furthermore, in the glass structure 6 of this wristwatch, when viewed in a plan view from above, the light absorbing layer 12 is arranged to avoid at least a portion of the first alignment mark portion 13, so that the light absorbing layer 12 does not come into contact with or overlap the first alignment mark portion 13, and the light absorbing layer 12 and the first alignment mark portion 13 can be arranged well.This allows a gap S1 to be formed between the light absorbing layer 12 and the first alignment mark portion 13, and allows some visible light to transmit through this gap S1.

[0047] In this case, in the glass structure 6 of this wristwatch, a semicircular cutout portion 12a is provided in the light absorbing layer 12, opening to the inner periphery of the light absorbing layer 12, and a first alignment mark portion 13 that absorbs visible light is provided with a gap S1 on the underside of the watch crystal 8 located within this cutout portion 12a, allowing some visible light to transmit through the gap S1 between the outer periphery of the first alignment mark portion 13 and the inner periphery of the cutout portion 12a of the light absorbing layer 12.

[0048] That is, in the crystal structure 6 of this wristwatch, the outer diameter of the first alignment mark portion 13 is formed to be approximately the same size as the radius of the cutout portion 12a, and the center of the first alignment mark portion 13 is positioned to correspond to the center of the cutout portion 12a of the light absorbing layer 12, so that the light absorbing layer 12 and the first alignment mark portion 13 do not come into contact or overlap, and a gap S1 can be reliably and satisfactorily provided between the outer periphery of the first alignment mark portion 13 and the inner periphery of the cutout portion 12a of the light absorbing layer 12.

[0049] Furthermore, in the glass structure 6 of this wristwatch, when viewed in a plan view from above, the first alignment mark portion 13 is provided on the inner periphery of the light absorption layer 12, which makes it easier to provide the second alignment mark portion 15 below the first alignment mark portion 13, thereby making it easier to detect the alignment of the second alignment mark portion 15 relative to the first alignment mark portion 13.

[0050] That is, in the crystal structure 6 of this wristwatch, the first alignment mark portion 13 is provided on the inner periphery, i.e., the inner periphery, of the light absorbing layer 12, and part of the outer periphery of this first alignment mark portion 13 is arranged to protrude inward from the cutout portion 12a of the light absorbing layer 12 beyond the inner periphery of the light absorbing layer 12, thereby making it easier to detect the alignment of the second alignment mark portion 15 with the first alignment mark portion 13. Furthermore, because the first alignment mark portion 13 is provided on the inner periphery of the light absorbing layer 12 (by having the first alignment mark portion 13 embed into the inner periphery of the light absorbing layer 12), the first alignment mark portion 13 can be made to appear to be substantially integrated with the light absorbing layer 12, and therefore it is possible to prevent the first alignment mark portion 13 from protruding inward, thereby preventing a deterioration in appearance.

[0051] Furthermore, in this wristwatch crystal structure 6, the solar panel 9 is a substantially annular member, and the inner diameter of the light absorbing layer 12 is equal to or smaller than the outer diameter of the solar panel 9, which allows the light absorbing layer 12 to reliably cover the outer periphery of the solar panel 9 and makes it difficult to see the internal structure. Furthermore, because the inner diameter of the light absorbing layer 12 is equal to or smaller than the outer diameter of the solar panel 9, the cutout 12a can be positioned further inward, which makes it possible to reduce the gap S1. In other words, it is possible to make it difficult to see the internal structure.

[0052] Furthermore, in the glass structure 6 of this wristwatch, when viewed in a plan view from above, the semi-light-transmitting layer 14 has a covering portion 14a that is provided continuously around the light absorbing layer 12 and the first alignment mark portion 13, so that the gap S1 between the first alignment mark portion 13 and the light absorbing layer 12 can be reliably covered by the covering portion 14a, and this covering portion 14a makes it difficult to see the internal structure, such as the watch module (not shown) inside the wristwatch case 1, through the gap S1 between the first alignment mark portion 13 and the light absorbing layer 12.

[0053] That is, in the glass structure 6 of this wristwatch, the covering portion 14a is arranged to protrude in a semicircular shape from the inner periphery of the semi-light-transmitting layer 14 while overlapping the peripheral edge of the cutout portion 12a of the light-absorbing layer 12. This allows the covering portion 14a to reliably cover the area corresponding to the gap S1 between the outer periphery of the first alignment mark portion 13 and the inner periphery of the cutout portion 12a, as well as the adjacent area corresponding to the outer periphery around the first alignment mark portion 13 located on the inner periphery of the light-absorbing layer 12. This allows some visible light to pass through to a certain extent, and the covering portion 14a makes it difficult to see the internal structure of the watch module (not shown) inside the wristwatch case 1.

[0054] Furthermore, in the glass structure 6 of this wristwatch, the light transmittance of the first alignment mark portion 13 and the light absorbing layer 12 is lower than that of the semi-light transmitting layer 14, so even if some visible light passes through the semi-light transmitting layer 14 and the covering portion 14a, the transmitted visible light can be well absorbed by the first alignment mark portion 13 and the light absorbing layer 12.

[0055] That is, in the glass structure 6 of this wristwatch, the light transmittance of the semi-light-transmitting layer 14 and the covering portion 14a is 5% to 15%, preferably 10%, and when the light transmittance of the semi-light-transmitting layer 14 and the covering portion 14a is about 10%, the light transmittance of the light-absorbing layer 12 and the first alignment mark portion 13 is 0% to 5%, preferably 0% (no visible light passes through).

[0056] As a result, in this wristwatch glass structure 6, visible light that passes through the semi-light-transmitting layer 14 and covering portion 14a can be almost completely absorbed by the first alignment mark portion 13 and light-absorbing layer 12, and when detecting alignment, the position of the second alignment mark portion 15 can be ascertained, particularly through covering portion 14a. In other words, by providing the semi-light-transmitting layer 14 and covering portion 14a, alignment detection can be performed, and when using a wristwatch that uses this glass structure 6, the internal structure, such as the watch module (not shown) inside the wristwatch case 1, can be made difficult to see through gap S1.

[0057] Furthermore, in the glass structure 6 of this wristwatch, the second alignment mark portion 15 is a through hole whose outer diameter is smaller than that of the first alignment mark portion 13, so that the second alignment mark portion 15 can be reliably covered by the first alignment mark portion 13. As a result, even if visible light that is irradiated onto the second alignment mark portion 15 and transmitted therethrough is irradiated onto the first alignment mark portion 13, the irradiated visible light can be reliably absorbed, so that the solar panel 9 can be accurately aligned with the watch crystal 8.

[0058] In other words, in the glass structure 6 of this wristwatch, when visible light is irradiated from the underside of the solar panel 9 toward the second alignment mark portion 15, some of the visible light that passes through the through hole in the second alignment mark portion 15 is transmitted through the covering portion 14a of the semi-transparent layer 14, and this transmitted visible light is almost completely absorbed by the first alignment mark portion 13, so it can be detected that the solar panel 9 is accurately aligned with the underside of the watch crystal 8.

[0059] Furthermore, in the glass structure 6 of this wristwatch, some of the visible light irradiated from the underside of the solar panel 9 toward the second alignment mark portion 15 is not completely absorbed by the first alignment mark portion 13, and as shown in Figures 9(a) and 9(b), some of the visible light leaks above the first alignment mark portion 13.When this leaked visible light is visible from above the watch crystal 8, it can be detected that the second alignment mark portion 15 is slightly misaligned with respect to the first alignment mark portion 13.

[0060] Therefore, the light transmittance of the light absorption layer 12 and the first alignment mark portion 13 and the light transmittance of the semi-light transmitting layer 14 and the covering portion 14a should at least be in a relationship such that the state in which the second alignment mark portion 15 is slightly misaligned with respect to the first alignment mark portion 13 and some visible light leaks above the first alignment mark portion 13 can be detected visually from above the watch crystal 8 or by using an optical sensor or the like.

[0061] 9(a) and 9(b), it is not acceptable for the second alignment mark portion 15 of the glass structure 6 to be misaligned with and protrude from the first alignment mark portion 13. In the glass structure 6 of this watch, the areas that need to be smoked (concealed) are those that are visible through the gap S1, i.e., between the light absorbing layer 12 and the solar panel 9 (or first alignment mark portion 13), and these areas can be concealed by making them less visible through the semi-transparent, or smoky, covering portion 14a of the semi-transparent layer 14.

[0062] Furthermore, the manufacturing method of this wristwatch crystal structure 6 includes a first step of providing at least one first alignment mark portion 13 that absorbs visible light on the crystal 8, which is a cover member that transmits at least visible light, and providing a semi-transparent layer 14 that transmits light in a portion of the wavelength range of visible light and absorbs light in other wavelength ranges of visible light, continuously around the first alignment mark portion 13 when viewed in a plan view from above; a second step of providing at least one second alignment mark portion 15 that transmits visible light at the position of the solar panel 9, which is the covered member that is covered by the first alignment mark portion 13 when viewed in a plan view from above; and a third step of irradiating visible light from the solar panel 9 side toward the crystal 8 to detect the alignment between the second alignment mark portion 15 of the solar panel 9 and the first alignment mark portion 13 of the crystal 8, thereby enabling accurate alignment between the crystal 8 and the solar panel 9 and making it difficult to see the internal structure.

[0063] That is, in the manufacturing method of this wristwatch glass structure 6, when aligning the solar panel 9 to the watch crystal 8 in the third step, visible light is irradiated from the underside of the solar panel 9 toward the second alignment mark portion 15, and part of the visible light that passes through the through hole of the second alignment mark portion 15 passes through the covering portion 14a of the semi-transparent layer 14 and is irradiated to the first alignment mark portion 13, and this irradiated visible light is almost completely absorbed by the first alignment mark portion 13, making it possible to detect that the solar panel 9 is accurately aligned to the underside of the watch crystal 8.

[0064] Furthermore, in the manufacturing method of this wristwatch glass structure 6, in the third step, a portion of the visible light irradiated from the underside of the solar panel 9 toward the second alignment mark portion 15 passes through the covering portion 14a of the semi-transparent layer 14, and this transmitted portion of the visible light is not completely absorbed by the first alignment mark portion 13, so that, as shown in Figures 9(a) and 9(b), a portion of the visible light leaks above the first alignment mark portion 13.If this leaked visible light is visible from above the watch crystal 8, it can be detected that the second alignment mark portion 15 is slightly misaligned with respect to the first alignment mark portion 13.

[0065] In the manufacturing method of this wristwatch glass structure 6, it is not acceptable for the second alignment mark portion 15 of the solar panel 9 to be slightly misaligned and protrude beyond the first alignment mark portion 13 in the third step. Here, the areas of the glass structure 6 that need to be smoked (concealed) are those visible through the gap S1, i.e., between the light absorbing layer 12 and the solar panel 9 (or first alignment mark portion 13), and these areas can be concealed by making them less visible through the semi-transparent, or smoky, covering portion 14a of the semi-transparent layer 14.

[0066] In the above-described embodiment, the first alignment mark portion 13 and the second alignment mark portion 15 are each circular in shape, but the present invention is not limited to this. For example, the first alignment mark portion 13 and the second alignment mark portion 15 may each be formed in a rectangular shape.

[0067] Furthermore, in the above-described embodiment and its modified examples, the circular first alignment mark portion 13 and second alignment mark portion 15 are provided on the 3 o'clock side and the 9 o'clock side, respectively. However, the present invention is not limited to this, and they do not necessarily have to be provided on the 3 o'clock side and the 9 o'clock side. A structure in which a rectangular or other shaped first alignment mark portion and a second alignment mark portion are provided on one of the 3 o'clock side and the 9 o'clock side, and the first alignment mark portion 13 and second alignment mark portion 15 of the above-described embodiment are provided on the other side, is also acceptable.

[0068] Furthermore, in the above-described embodiment and modified example, the first alignment mark portion 13 etc. and the second alignment mark portion 15 etc. are described as being provided on the 3 o'clock side and the 9 o'clock side, but the present invention is not limited to this, and they may be provided in any position on the same circumference, and they do not necessarily have to be provided in two places, but may be provided in only one place, or may be provided in three or more places.

[0069] Furthermore, in the above-described embodiments and variants, the first alignment mark portion 13, etc. and the second alignment mark portion 15, etc. are described as being formed in a circular or rectangular shape, but the present invention is not limited to this and may be formed in a polygonal shape such as a pentagon or hexagon, or in an elliptical shape, for example.

[0070] Furthermore, in the above-described embodiment, the solar panel 9 is formed in a substantially annular shape, but the present invention is not limited to this, and the solar panel may be formed in a circular shape.

[0071] Furthermore, in the above-described embodiment, the present invention has been described as being applied to a wristwatch, but it does not necessarily have to be a wristwatch, and can be applied to various types of clocks, such as travel watches, alarm clocks, table clocks, wall clocks, etc. Also, the present invention does not necessarily have to be a clock, and can be applied to electronic devices such as meters. [Explanation of symbols]

[0072] 1 watch case 2 Case body 3 First exterior member 4 Second exterior member 5 push button switch 6 Glass Structure 7 Back cover 8. Watch Glass 8a Function display section 9. Solar Panels 9a Cell 9b Connection wiring section 10 double-sided adhesive tape 11. Adhesive 12 Light absorption layer 12a Notch 13 First alignment mark 14 Semi-transparent layer 14a Cover 15 Second alignment mark S1 Gap

Claims

1. a cover member that is transparent to at least visible light and that is provided with at least one first alignment mark portion that absorbs visible light; a semi-transparent layer that is provided below the first alignment mark portion, that is provided continuously around the first alignment mark portion in a plan view from a certain direction, that transmits light in a part of a wavelength range of visible light and absorbs light in other wavelength ranges of visible light; a covered member provided below the semi-light-transmitting layer, the covered member having at least one second alignment mark portion that transmits visible light and is provided at a position that is covered by the first alignment mark portion in a plan view from the certain direction; A cover structure comprising:

2. the cover member has a substantially annular light absorbing layer that absorbs visible light at least at a peripheral edge portion that is visible in a plan view from the certain direction; The cover structure according to claim 1 .

3. the light absorbing layer is provided so as to avoid at least a part of the first alignment mark portion in the plan view from the certain direction; The cover structure according to claim 2 .

4. When viewed from the certain direction, the first alignment mark portion is provided on an inner periphery of the light absorption layer. The cover structure according to claim 3 .

5. the covered member is a member having either a substantially circular or a substantially annular shape, The inner diameter of the light absorbing layer is equal to or smaller than the outer diameter of the covered member. The cover structure according to claim 4 .

6. When viewed from the certain direction, the semi-light-transmitting layer has a covering portion that is continuously provided around the light absorbing layer and the first alignment mark portion. The cover structure according to claim 5 .

7. the light transmittance of the first alignment mark portion and the light absorption layer is lower than the light transmittance of the semi-light transmitting layer; The cover structure according to claim 2 .

8. the second alignment mark portion is a through hole having an outer diameter smaller than an outer diameter of the first alignment mark portion; The cover structure according to claim 1 .

9. A watch equipped with the cover structure according to any one of claims 1 to 8.

10. a first step of providing at least one first alignment mark portion that absorbs visible light on a cover member that transmits at least visible light, and providing a semi-light-transmitting layer that transmits light in a part of the wavelength range of visible light and absorbs light in other wavelength ranges of visible light continuously around the periphery of the first alignment mark portion in a plan view from a certain direction; a second step of providing at least one second alignment mark portion that transmits visible light at a position on the covered member that is covered by the first alignment mark portion in a plan view from the certain direction; a third step of irradiating visible light from the covered member side toward the cover member to detect alignment between the second alignment mark portion of the covered member and the first alignment mark portion of the cover member; A method for manufacturing a cover structure comprising:

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