Cover structure, timepiece, and manufacturing method of 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] This invention relates to a cover structure used for electronic devices such as watches and instruments, a watch provided with the same, and a method for manufacturing the cover structure.

Background Art

[0002] For example, in a wristwatch, as described in Patent Document 1, a watch glass is provided at the upper opening of the wristwatch case, a transparent dial is disposed below the watch glass, and a watch movement and a solar panel are arranged in parallel below the dial. Such a structure is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

[0004] In such a wristwatch, in order to prevent the watch movement from being seen through the transparent dial, a light-shielding seal is directly attached to the upper surface of the watch movement located on the inner peripheral side of the solar panel.

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in such a wristwatch, when directly attaching the light-shielding seal to the watch movement, it is difficult to align the position of the light-shielding seal with respect to the watch movement, and once attached, it is difficult to correct.

[0006] The problem to be solved by this invention is to provide a cover structure capable of accurately aligning members with each other and making the internal structure difficult to see, a watch provided with the same, and a method for manufacturing the cover structure.

Means for Solving the Problems

[0007] The present invention relates to a cover member that transmits at least visible light, the cover member being provided with at least one first alignment mark portion that absorbs visible light, and a semi-transmissive layer that is provided below the first alignment mark portion and is continuously provided around the first alignment mark portion in a plan view from a certain direction, transmits light in a partial 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-transmissive layer and is provided with at least one second alignment mark portion that transmits visible light at a position covered by the first alignment mark portion in a plan view from the certain direction. The present invention relates to a cover structure including the above components.

Advantages of the Invention

[0008] According to the present invention, it is possible to accurately align the members with each other and make the internal structure difficult to see.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying out the Invention

[0010] Hereinafter, with reference to Figs. 1 to 9, an embodiment of a wristwatch to which this invention is applied will be described. As shown in Figs. 1 and 2, this wristwatch includes a wristwatch case 1. This wristwatch case 1 includes a case body 2, a first exterior member 3, and a second exterior member 4.

[0011] As shown in Figs. 1 and 2, the case body 2 is formed of a metal such as stainless steel or a synthetic resin with high rigidity. The first exterior member 3 is attached to the upper outer periphery of the case body 2 and is formed of a synthetic resin having elasticity such as urethane resin. The second exterior member 4 protects the 9 o'clock side and 3 o'clock side of the first exterior member 3 and is formed of a metal such as stainless steel.

[0012] As shown in Fig. 1, push-button switches 5 are respectively provided on the 2 o'clock side, 4 o'clock side, 8 o'clock side, 9 o'clock side, and 10 o'clock side of this wristwatch case 1. As shown in Fig. 2, a glass structure 6 which is a cover structure is provided at the upper opening of this wristwatch case 1, that is, at the upper part of the case body 2. Also, a back cover 7 is attached to the lower part of the wristwatch case 1, that is, the lower part of the case body 2 via a waterproof packing 7a. A timepiece module (not shown) is provided inside this wristwatch case 1.

[0013] As shown in FIGS. 2 and 3, the glass structure 6 includes a watch glass 8 as a cover member and a solar panel 9 as a covered member. This glass structure 6 has a structure in which the solar panel 9 is attached to the lower surface of the watch glass 8 by a double-sided adhesive tape 10 that is transparent (transmitting light of wavelengths in the entire visible light band almost). In this case, the watch glass 8 is a transparent glass plate that transmits at least visible light (transmitting light of wavelengths in the entire visible light band almost), and is formed in a substantially disc shape. The outer peripheral portion of this watch glass 8 is disposed on the upper outer peripheral portion of the case body 2 and fixed by an adhesive 11.

[0014] In this case, the solar panel 9 is made of a semiconductor material such as silicon-based materials such as single crystal silicon and polycrystalline silicon, or gallium-based materials. Generally, solar panels often have a cell color that is relatively close to black, such as black, gray close to black, dark blue, and dark purple. The solar panel 9 of the present embodiment is gray close to black.

[0015] As shown in FIGS. 4 and 5, a light absorption layer 12 that absorbs visible light is provided substantially annularly by silk printing on the outer peripheral portion of the lower surface of the watch glass 8. For convenience, the outer diameter of the substantially annular light absorption layer 12 in a plan view from above is called the outer diameter, and the inner diameter is called the inner diameter. However, the inner diameter is defined as the length of the inner diameter of the light absorption layer 12 when there are no irregularities such as the notch portion 12a and the first alignment mark portion 13 described later (the same applies to the semi-light-transmitting layer 14 described later). The light absorption layer 12 is, for example, a black layer. This light absorption layer 12 is formed such that the outer diameter is substantially the same as the outer diameter of the watch glass 8, the inner diameter is substantially the same as the outer diameter of the solar panel 9, or the inner diameter is less than or equal to the outer diameter of the solar panel 9 and greater than the inner diameter of the solar panel 9. On the lower surface of the watch glass 8 located on the inner peripheral side of this light absorption layer 12, a function display portion 8a representing a watch function or the like is provided substantially in an arc shape along the outer periphery of the solar panel 9. The function display portion 8a is preferably printed with an ink having light transmissivity in order to increase the light reception amount of the solar panel 9.

[0016] Further, as shown in FIGS. 8(a) and 8(b), semi-circular cutout portions 12a are provided on the 9 o'clock side and the 3 o'clock side of the light absorption layer 12, respectively, and are open to the inner peripheral side of the light absorption layer 12. For the sake of convenience, when referring to the inner diameter of the semi-circular cutout portion 12a, the diameter of the circle formed when the arc of the semi-circular shape in a plan view from above is extended is referred to as the inner diameter (the outer diameter of the covering portion 14a described later is the same). On the lower surface of the watch glass 8 located within each of the cutout portions 12a on the 9 o'clock side and the 3 o'clock side of the light absorption layer 12, first alignment mark portions 13 are respectively provided by silk printing. Each of these first alignment mark portions 13 is a layer that absorbs visible light, and is formed in a substantially circular shape whose outer diameter is smaller than the inner diameter of each cutout portion 12a.

[0017] As shown in FIGS. 8(a) and 8(b), each of these first alignment mark portions 13 is formed such that its outer diameter is substantially the same as the radius of the cutout portion 12a. The centers of these first alignment mark portions 13 are provided corresponding to the centers of each of the cutout portions 12a on the 9 o'clock side and the 3 o'clock side of the light absorption layer 12. As a result, each of the first alignment mark portions 13 is provided with a gap S1 between its outer peripheral portion and the inner peripheral portions of each of the cutout portions 12a on the 9 o'clock side and the 3 o'clock side of the light absorption layer 12.

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

[0019] Therefore, as shown in FIGS. 8(a) and 8(b), the light absorption layer 12 is provided avoiding the first alignment mark portion 13 so as not to contact or overlap the first alignment mark portion 13. Further, the first alignment mark portion 13 is provided on the inner peripheral side of the light absorption layer 12, that is, on the inner periphery, and a part of its outer peripheral edge protrudes from the cutout portion 12a of the light absorption layer 12 to the inside of the inner peripheral portion of the light absorption layer 12.

[0020] Incidentally, as shown in FIGS. 3 and 6, a semi-transmissive layer 14 that transmits visible light is provided in a substantially annular shape by medium printing below the light absorption layer 12 and the first alignment mark portion 13. This semi-transmissive layer 14 is a semi-transparent layer that enhances the adhesiveness to the case body 2, the light absorption layer 12, and the first alignment mark portion 13, and is colored with, for example, a black coloring material.

[0021] The transmittance of the semi-transmissive layer 14 is not 100% at all wavelengths within the visible light band, and it absorbs at least some wavelengths such as wavelengths in the blue band (400 to 500 nm), wavelengths in the red band (650 to 750 nm), and wavelengths in the green band (500 to 550 nm). The semi-transmissive layer 14 of the present embodiment is a layer that transmits light of wavelengths across the entire visible light band to the same extent. Also, the term "semi-transmissive" is an expression for convenience and does not mean a light transmittance of 50% as will be described later. This semi-transmissive layer 14 is formed such that its inner diameter is approximately the same as the inner diameter of the light absorption layer 12 and its outer diameter is slightly smaller than the outer diameter of the light absorption layer 12.

[0022] At the 9 o'clock side and the 3 o'clock side of this semi-transmissive layer 14, as shown in FIGS. 6 and 8, covering portions 14a that cover each notch portion 12a of the light absorption layer 12 together with the first alignment mark portion 13 from below are provided respectively. These covering portions 14a are formed in a substantially semi-circular shape with an outer diameter slightly larger than the inner diameter of the notch portion 12a of the light absorption layer 12. Therefore, the covering portion 14a is a smoked portion that applies smoke (obscuration) by transmitting visible light to some extent, and is provided so as to project semi-circularly from the inner peripheral portion of the semi-transmissive layer 14 in a state of overlapping the peripheral edge portion of the notch portion 12a.

[0023] As a result, as shown in FIGS. 8(a) and 8(b), the covering portion 14a allows visible light to pass through to some extent at locations corresponding to the gap S1 between the outer peripheral portion of the first alignment mark portion 13 and the inner peripheral portion of the notch portion 12a, and at locations adjacent to and corresponding to the outer peripheral edge around the first alignment mark portion 13 located on the inner periphery of the light absorption layer 12 (that is, at locations continuous around the light absorption layer 12 and the first alignment mark portion 13). In this case, the light transmittance of the semi-light-transmitting layer 14 and the covering portion 14a is 5% to 15%, preferably 10%.

[0024] Also, the light transmittance of each of the light absorption layer 12 and the first alignment mark portion 13 is set lower than the light transmittance 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 absorption layer 12 and the first alignment mark portion 13 is 0% to 5%, preferably 0% (not allowing any visible light to pass through).

[0025] On the other hand, as shown in FIGS. 4 and 7, the solar panel 9 attached to the lower surface of the watch glass 8 is formed in a substantially annular shape such that its outer diameter is approximately the same as the inner diameter of the light absorption layer 12, or its outer diameter is larger than the inner diameter of the light absorption layer 12 and its inner diameter is smaller than the arrangement area of the function display portion 8a of the watch glass 8. This solar panel 9 receives external light transmitted through the watch glass 8 and generates electric power, and a plurality of cells 9a are arranged in an annular shape. The solar panel 9 has a plurality of cells 9a connected by a connection wiring portion 9b provided on its outer periphery and is electrically connected to a watch module (not shown) in the watch case 1.

[0026] As shown in FIGS. 7 and 8, second alignment mark portions 15 covered by the first alignment mark portion 13 are provided on the outer peripheral portions of the 9 o'clock side and the 3 o'clock side of the solar panel 9, respectively. Each of these second alignment mark portions 15 is a circular through-hole penetrating the upper and lower surfaces of the solar panel 9, and its outer diameter is formed smaller than the outer diameter of the first alignment mark portion 13.

[0027] As a result, as shown in FIGS. 8(a) and 8(b), the glass structure 6 is irradiated with visible light from the lower side of the solar panel 9 toward the second alignment mark portion 15, and the irradiated visible light is irradiated to the covering portion 14a of the semi-light-transmitting layer 14 through the through hole of the second alignment mark portion 15. When a part of the irradiated visible light passes through the covering portion 14a of the semi-light-transmitting layer 14 and is irradiated to the first alignment mark portion 13, and the irradiated visible light is almost completely absorbed at the first alignment mark portion 13, it is detected that the solar panel 9 is accurately aligned with the lower surface of the watch glass 8.

[0028] Further, in the glass structure 6, when the visible light irradiated from the lower side of the solar panel 9 toward the second alignment mark portion 15 is not completely absorbed at the first alignment mark portion 13, and as shown in FIGS. 9(a) and 9(b), the visible light leaks above the first alignment mark portion 13, and when the leaked visible light is visible from above the watch glass 8, it is detected that the second alignment mark portion 15 is misaligned with respect to the first alignment mark portion 13.

[0029] In this embodiment, as shown in FIGS. 9(a) and 9(b), a situation where the second alignment mark portion 15 of the glass structure 6 is misaligned with respect to the first alignment mark portion 13 and protrudes is not tolerated. In this embodiment, the portions to be smoked (hidden) are the portions visible from the gap S1, that is, between the light absorption layer 12 and the solar panel 9 (or the first alignment mark portion 13). These portions are hidden so as to be difficult to see by the semi-light transmission of the covering portion 14a of the semi-light-transmitting layer 14, that is, by being smoked.

[0030] As a result, the glass structure 6 hides the watch module (not shown) inside the watch case 1 from being externally visible through the semi-transmissive layer 14 covering portion 14a for the portion where the smoke (obscuring) that can be seen from the gap S1 is desired. Also, the light absorption layer 12, the first alignment mark portion 13, the semi-transmissive layer 14, and the solar panel 9 are of the same color system, thereby further hiding the watch module (not shown) inside the watch case 1 so that it is difficult to be seen from the outside. Note that the same color system refers to black or colors close to black (gray close to black, dark blue, dark purple) in this embodiment. However, if the color of the solar panel 9 is close to blue, for example, the light absorption layer 12, the first alignment mark portion 13, and the semi-transmissive layer 14 may be made closer to blue.

[0031] Next, a manufacturing method for manufacturing such a glass structure 6 of a wristwatch will be described. This manufacturing method includes a first step of providing the first alignment mark portion 13 and the semi-transmissive layer 14 on the lower surface of the watch glass 8, a second step of providing the second alignment mark portion 15 on the solar panel 9, a third step of irradiating visible light from the lower side of 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 glass 8.

[0032] In the first step, first, the light absorption layer 12 and the first alignment mark portion 13 are printed on the lower surface of the watch glass 8 by silk printing. In this case, the light absorption layer 12 is formed in a substantially annular shape at the peripheral end portion on the lower surface of the watch glass 8. At this time, semi-circular cutout portions 12a are respectively provided on the 9 o'clock side and the 3 o'clock side of the light absorption layer 12, and the first alignment mark portion 13 is provided in each of these cutout portions 12a.

[0033] In this case, the first alignment mark portion 13 is formed in a circular shape with an area smaller than that of the notch portion 12a, and a gap S1 is provided between the outer peripheral portion thereof and the inner peripheral portion of the notch portion 12a. Further, a part of the outer peripheral portion of the first alignment mark portion 13, that is, the outer peripheral edge located on the inner peripheral side of the light absorption layer 12, is provided to protrude from the notch portion 12a toward the inner peripheral side of the light absorption layer 12.

[0034] Also, in this first step, a semi-transmissive layer 14 is formed on the lower surface of the watch glass 8 including the light absorption layer 12 and the first alignment mark portion 13 by medium printing. This semi-transmissive layer 14 is a semi-transparent layer that transmits visible light to a certain extent, and covering portions 14a are provided on the 9 o'clock side and the 3 o'clock side, respectively. These covering portions 14a are provided to protrude semi-circularly from the inner peripheral portion of the semi-transmissive layer 14 in a state of overlapping the peripheral edge portion of the notch portion 12a.

[0035] Thereby, as shown in FIGS. 8(a) and 8(b), the covering portion 14a transmits visible light to a certain extent in a state of covering the location corresponding to the gap S1 between the outer peripheral portion of the first alignment mark portion 13 and the inner peripheral portion of the notch portion 12a and the location adjacent to and corresponding to the outer peripheral 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 at the 9 o'clock side and the 3 o'clock side of the solar panel 9, respectively. These second alignment mark portions 15 are through holes through which light passes, and the inner diameter thereof is formed smaller than the outer diameter of the first alignment mark portion 13. Thereby, when the second alignment mark portion 15 is disposed corresponding to the lower side of the first alignment mark portion 13, it is covered by the first alignment mark portion 13.

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

[0038] At this time, when the 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 lower surface of the crystal glass 8. Also, when the visible light irradiated from the lower side 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 FIGS. 9(a) and 9(b), the visible light leaks above the first alignment mark portion 13 and this leaked visible light is visible from above the crystal glass 8, it is detected that the second alignment mark portion 15 is misaligned with respect to the first alignment mark portion 13.

[0039] In this embodiment, as shown in FIGS. 9(a) and 9(b), a situation where the second alignment mark portion 15 of the glass structure 6 is misaligned with respect to the first alignment mark portion 13 and protrudes is not tolerated. For this reason, in this embodiment, the portion to be smoked (hidden) is the portion visible from the gap S1, that is, the portion between the light absorption layer 12 and the solar panel 9 (or the first alignment mark portion 13). In particular, when this place is viewed from an oblique direction, the internal structure such as a clock module (not shown) inside the wristwatch case 1 can be seen. According to this embodiment, these portions are hidden so as to be difficult to see by the semi-light transmission of the covering portion 14a of the semi-light-transmitting layer 14, that is, by being smoked.

[0040] In the fourth step, the aligned solar panel 9 is attached to the watch glass 8 with a 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 watch glass 8, the solar panel 9 is attached to the lower surface of the watch glass 8 with the transparent double-sided adhesive tape 10. For this reason, the solar panel 9 can receive external light through the transparent double-sided adhesive tape 10. Thereby, the glass structure 6 is manufactured.

[0041] As shown in FIG. 3, in the glass structure 6 manufactured in this way, the watch glass 8 is disposed on the upper outer peripheral portion of the case body 2 and fixed by the adhesive 11. In this state, as shown in FIG. 2, when the first exterior member 3 is attached to the upper outer periphery of the case body 2, the outer peripheral portion of the upper surface of the watch glass 8 is pressed by the second exterior member 4.

[0042] Then, the second exterior member 4 is attached to the 3 o'clock side and the 9 o'clock side of the first exterior member 3. Thereby, the wristwatch case 1 is assembled. A watch module (not shown) is provided in the wristwatch case 1, and in this state, the back cover 7 is attached to the lower part of the wristwatch case 1 together with the waterproof packing 7a. Thereby, the wristwatch is assembled.

[0043] Thus, according to the glass structure 6 of this wristwatch, the watch glass 8 is a cover member that transmits at least visible light, and the watch glass 8 is provided with at least one first alignment mark portion 13 that absorbs visible light, and is provided below the first alignment mark portion 13 and continuously provided around the first alignment mark portion 13 in a plan view from above in a certain direction. The semi-light-transmitting layer 14 that transmits light in a part of the wavelength range of visible light and absorbs light in other wavelength ranges of visible light, and is provided below the semi-light-transmitting layer 14, and in a plan view from above, at least one second alignment mark portion 15 that transmits visible light is provided at a position covered by the first alignment mark portion 13. Since it includes the solar panel 9 which is a covered member, the watch glass 8 and the solar panel 9 can be accurately aligned, and the internal structure can be made difficult to see.

[0044] That is, in the glass structure 6 of this wristwatch, when visible light is irradiated from below the solar panel 9 toward the second alignment mark portion 15, a part of the visible light transmitted through the second alignment mark portion 15 (through-hole) passes through the covering portion 14a of the semi-light-transmissive layer 14 and is irradiated onto the first alignment mark portion 13. By almost completely absorbing this irradiated visible light at the first alignment mark portion 13, it can be detected that the solar panel 9 is accurately aligned with the lower surface of the watch glass 8.

[0045] Also, in the glass structure 6 of this wristwatch, since the watch glass 8 has a substantially annular light absorption layer 12 that absorbs visible light at least at the peripheral edge portion of the watch glass 8 that is visible in a plan view from above, the external light transmitted through the watch glass 8 can be absorbed by the light absorption layer 12. Thereby, the intrusion of external light from the outer peripheral portion of the watch glass 8 can be prevented, so that the lower side of the peripheral edge portion of the watch glass 8 can be made difficult to be seen from the outside.

[0046] Also, in the glass structure 6 of this wristwatch, in a plan view from above, since the light absorption layer 12 is provided so as to avoid at least a part of the first alignment mark portion 13, the light absorption layer 12 and the first alignment mark portion 13 can be provided well without the light absorption layer 12 contacting or overlapping the first alignment mark portion 13. Thereby, a gap S1 can be provided between the light absorption layer 12 and the first alignment mark portion 13, so that a part of the visible light can be transmitted through this gap S1.

[0047] In this case, in the glass structure 6 of this wristwatch, a semi-circular notch portion 12a is provided in the light absorption layer 12 so as to be open to the inner peripheral side of the light absorption layer 12, and the first alignment mark portion 13 that absorbs visible light is provided with a gap S1 on the lower surface of the watch glass 8 located within this notch portion 12a. Thereby, a part of the visible light can be transmitted through the gap S1 between the outer peripheral portion of the first alignment mark portion 13 and the inner peripheral portion of the notch portion 12a of the light absorption layer 12.

[0048] That is, in the glass 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 notch portion 12a, and the center portion of the first alignment mark portion 13 is arranged corresponding to the center portion of the notch portion 12a of the light absorption layer 12. As a result, the light absorption layer 12 and the first alignment mark portion 13 do not contact or overlap with each other, and a gap S1 can be reliably and favorably provided between the outer peripheral portion of the first alignment mark portion 13 and the inner peripheral portion of the notch portion 12a of the light absorption layer 12.

[0049] Further, in the glass structure 6 of this wristwatch, in a plan view from above, since the first alignment mark portion 13 is provided on the inner periphery of the light absorption layer 12, it is easy to provide the second alignment mark portion 15 below the first alignment mark portion 13, and thereby it is easy to detect the alignment of the second alignment mark portion 15 with respect to the first alignment mark portion 13.

[0050] That is, in the glass structure 6 of this wristwatch, the first alignment mark portion 13 is provided on the inner peripheral side of the light absorption layer 12, that is, on the inner periphery. A part of the outer peripheral edge of the first alignment mark portion 13 protrudes inward from the notch portion 12a of the light absorption layer 12 and is arranged inside the inner peripheral portion of the light absorption layer 12. As a result, it is easy to detect the alignment of the second alignment mark portion 15 with respect to the first alignment mark portion 13. Further, since the first alignment mark portion 13 is provided on the inner periphery of the light absorption layer 12 (by biting the first alignment mark portion 13 into the inner periphery of the light absorption layer 12), it can be made to appear that the first alignment mark portion 13 is substantially integrated with the light absorption layer 12. Therefore, it is possible to prevent the appearance from deteriorating due to the first alignment mark portion 13 protruding inward.

[0051] Further, in the glass structure 6 of this wristwatch, the solar panel 9 is a member having a substantially annular shape, and since the inner diameter of the light absorption layer 12 is equal to or less than the outer diameter of the solar panel 9, the light absorption layer 12 can surely cover the outer peripheral portion of the solar panel 9, and the internal structure can be made difficult to see. Also, since the inner diameter of the light absorption layer 12 is equal to or less than the outer diameter of the solar panel 9, the notch portion 12a is provided more inward, so that the gap S1 can be made smaller. That is, the internal structure can be made difficult to see.

[0052] Further, in the glass structure 6 of this wristwatch, in a plan view from above, since the semi-transmissive layer 14 has a covering portion 14a that is continuously provided around the light absorption layer 12 and the first alignment mark portion 13, the gap S1 between the first alignment mark portion 13 and the light absorption layer 12 can be surely covered by the covering portion 14a, and the internal structure such as a timepiece module (not shown) in the wristwatch case 1 can be made difficult to see through the gap S1 between the first alignment mark portion 13 and the light absorption layer 12 by this covering portion 14a.

[0053] That is, in the glass structure 6 of this wristwatch, since the covering portion 14a protrudes in a semi-circular shape from the inner peripheral portion of the semi-transmissive layer 14 in a state of overlapping with the peripheral edge portion of the notch portion 12a of the light absorption layer 12, the portion corresponding to the gap S1 between the outer peripheral portion of the first alignment mark portion 13 and the inner peripheral portion of the notch portion 12a, and the portion adjacent to and corresponding to the outer peripheral edge around the first alignment mark portion 13 located on the inner periphery of the light absorption layer 12 can be surely covered by the covering portion 14a, and a part of the visible light can be transmitted to a certain extent. In addition, the internal structure such as a timepiece module (not shown) in the wristwatch case 1 can be made difficult to see by the covering portion 14a.

[0054] Further, in the glass structure 6 of this wristwatch, since the light transmittance of the first alignment mark portion 13 and the light absorption layer 12 is lower than the light transmittance of the semi-transmissive layer 14, even if a part of the visible light passes through the semi-transmissive 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 absorption layer 12.

[0055] That is, in the glass structure 6 of this wristwatch, the light transmittance of the semi-transparent layer 14 and the covering portion 14a is 5% to 15%, preferably 10%. When the light transmittance of the semi-transparent layer 14 and the covering portion 14a is about 10%, the light transmittance of each of the light absorption layer 12 and the first alignment mark portion 13 is 0% to 5%, preferably 0% (not transmitting any visible light).

[0056] Thereby, in the glass structure 6 of this wristwatch, the visible light transmitted through the semi-transparent layer 14 and the covering portion 14a can be almost completely absorbed by the first alignment mark portion 13 and the light absorption layer 12, and when detecting the alignment, the position of the second alignment mark portion 15 can be grasped particularly through the covering portion 14a. That is, by providing the semi-transparent layer 14 and the covering portion 14a, alignment detection can be performed, and when using the wristwatch using this glass structure 6, the internal structure such as the timepiece module (not shown) in the wristwatch case 1 can be made difficult to see through the gap S1.

[0057] Also, in the glass structure 6 of this wristwatch, since the second alignment mark portion 15 is a through hole and its outer diameter is smaller than the outer diameter of the first alignment mark portion 13, the second alignment mark portion 15 can be surely covered and hidden by the first alignment mark portion 13. Thus, even if the visible light irradiated and transmitted to the second alignment mark portion 15 is irradiated to the first alignment mark portion 13, the irradiated visible light can be surely absorbed, so that the solar panel 9 can be accurately aligned with the timepiece glass 8.

[0058] That is, in the glass structure 6 of this wristwatch, when visible light is irradiated from the lower side of the solar panel 9 toward the second alignment mark portion 15, a part of the visible light passing through the through hole of the second alignment mark portion 15 passes 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. Therefore, it can be detected that the solar panel 9 is accurately aligned with the lower surface of the timepiece glass 8.

[0059] In addition, in the glass structure 6 of this wristwatch, a part of 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. As shown in FIGS. 9(a) and 9(b), a part of the visible light leaks above the first alignment mark portion 13. When this leaked visible light can be seen from above the watch glass 8, it is possible to detect 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 only need to be in a relationship such that when the second alignment mark portion 15 is slightly misaligned with respect to the first alignment mark portion 13 and a part of the visible light leaks above the first alignment mark portion 13, it can be detected visually from above the watch glass 8 or using a light sensor or the like.

[0061] In addition, in the glass structure 6 of this wristwatch, as shown in FIGS. 9(a) and 9(b), a situation where the second alignment mark portion 15 of the glass structure 6 is misaligned and protrudes with respect to the first alignment mark portion 13 is not tolerated. In the glass structure 6 of this wristwatch, the portion to be smoked (hidden) is the portion visible from the gap S1, that is, between the light absorption layer 12 and the solar panel 9 (or the first alignment mark portion 13), and these portions can be hidden by the semi-light-transmitting property, that is, being smoked, of the covering portion 14a of the semi-light-transmitting layer 14 so as to be difficult to see.

[0062] Further, according to the manufacturing method of the glass structure 6 of this wristwatch, at least one first alignment mark portion 13 that absorbs visible light is provided on the watch glass 8, which is a cover member that transmits at least visible light. A first step of providing a semi-light-transmitting layer 14 that is continuous around the first alignment mark portion 13 in a plan view from above, transmits light in a partial wavelength range of visible light, and absorbs light in other wavelength ranges of visible light; and 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 a covered member covered by the first alignment mark portion 13, in a plan view from above. And a third step of irradiating visible light from the solar panel 9 side toward the watch glass 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 glass 8. By including these steps, the watch glass 8 and the solar panel 9 can be accurately aligned, and the internal structure can be made less visible.

[0063] That is, in the manufacturing method of the glass structure 6 of this wristwatch, when aligning the solar panel 9 with the watch glass 8 in the third step, visible light is irradiated from the lower side of the solar panel 9 toward the second alignment mark portion 15, and a part of the visible light that has passed through the through-hole of the second alignment mark portion 15 passes through the covering portion 14a of the semi-light-transmitting layer 14 and is irradiated onto the first alignment mark portion 13. By detecting that the irradiated visible light is almost completely absorbed by the first alignment mark portion 13, it can be detected that the solar panel 9 is accurately aligned with the lower surface of the watch glass 8.

[0064] Also, in the manufacturing method of the glass structure 6 of this wristwatch, a part of the visible light irradiated from the lower side of the solar panel 9 toward the second alignment mark portion 15 in the third step passes through the covering portion 14a of the semi-light-transmitting layer 14, and if this transmitted part of the visible light is not completely absorbed by the first alignment mark portion 13 and, as shown in FIGS. 9(a) and 9(b), a part of the visible light leaks above the first alignment mark portion 13 and this leaked visible light is visible from above the watch glass 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 the glass structure 6 of this wristwatch, in the third step, a situation where the second alignment mark portion 15 of the solar panel 9 is slightly misaligned with respect to the first alignment mark portion 13 and protrudes is not tolerated. Here, the portion to be smoked (hidden) in the glass structure 6 is the portion visible from the gap S1, that is, between the light absorption layer 12 and the solar panel 9 (or the first alignment mark portion 13), and these portions can be hidden so as to be difficult to see by covering them with the semi-light-transmitting portion 14a of the semi-light-transmitting layer 14, that is, by applying smoke.

[0066] In the above-described embodiment, the case where the shapes of the first alignment mark portion 13 and the second alignment mark portion 15 are each circular has been described. However, the present invention is not limited to this. For example, the shapes of the first alignment mark portion 13 and the second alignment mark portion 15 may each be formed in a square shape.

[0067] Also, in the above-described embodiment and its modification, the case where the circular first alignment mark portion 13 and the second alignment mark portion 15 are provided on the 3 o'clock side and the 9 o'clock side, respectively, has been described. However, the present invention is not limited to this. It is not necessarily required to be provided on the 3 o'clock side and the 9 o'clock side. A structure in which a first alignment mark portion and a second alignment mark portion, such as a square shape, are provided on one of the 3 o'clock side and the 9 o'clock side, and the first alignment mark portion 13 and the second alignment mark portion 15 of the above-described embodiment are provided on the other side may also be acceptable.

[0068] Also, in the above-described embodiment and its modification, the case where the first alignment mark portion 13 etc. and the second alignment mark portion 15 etc. are provided on the 3 o'clock side and the 9 o'clock side has been described. However, the present invention is not limited to this. As long as they are on the same circumference, they may be provided at any position, and it is not necessarily required to be provided at two locations. It may be provided at only one location, or may be provided at three or more locations.

[0069] In addition, in the above-described embodiments and modifications, the case where the first alignment mark portion 13 and the like and the second alignment mark portion 15 and the like are formed in a circular or rectangular shape has been described. However, the present invention is not limited to this, and for example, it may have a polygonal shape such as a pentagon or a hexagon, or an elliptical shape.

[0070] In addition, in the above-described embodiment, the case where the solar panel 9 is formed in a substantially annular shape has been described. However, 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 case of applying to a wristwatch has been described. However, the present invention does not necessarily have to be a wristwatch, and it can be applied to various timepieces such as travel watches, alarm clocks, table clocks, and wall clocks. Also, the present invention does not necessarily have to be a timepiece, and it can also be applied to electronic devices such as instruments.

Explanation of Reference Numerals

[0072] 1 Wristwatch 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 portion 9 Solar panel 9a Cell 9b Connection wiring portion 10 Double-sided adhesive tape 11 Adhesive 12 Light absorption layer 12a Notch portion 13 First alignment mark portion 14 Semi-transmissive layer 14a Covering portion 15 Second alignment mark portion S1 Gap

Claims

1. a cover member that transmits at least visible light and has at least one first alignment mark portion that absorbs visible light; a semi-light-transmitting layer that is provided below the first alignment mark portion, is provided continuously around the first alignment mark portion in a plan view from a certain direction, and transmits light in a part of a wavelength range of visible light and absorbs light in the other wavelength range 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 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 end 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 in a plan view from the certain direction, the first alignment mark portion is provided on an inner periphery of the light absorbing layer. The cover structure according to claim 3 .

5. The covered member is a member having a substantially circular or 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 provided continuously 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 absorbing 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 comprising 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 first alignment mark portion when viewed 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 of the covered member that is covered by the first alignment mark portion in a plan view from the certain direction; a third step of detecting alignment between the second alignment mark portion of the covered member and the first alignment mark portion of the cover member by irradiating visible light from the covered member side toward the cover member; A method for manufacturing a cover structure comprising the steps of:

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