Cover structure, timepiece, and method for manufacturing cover structure

Abstract

The invention provides a cover structure, a timepiece provided with the cover structure, and a method for manufacturing the cover structure, wherein parts can be accurately aligned with each other, and the internal structure can be difficult to see. As a solution, the cover structure is provided with: a timepiece glass (8) that is a cover member that transmits at least visible light and is provided with a first alignment mark part (13) that absorbs at least one of the visible light; a semi-transparent layer (14) that is provided below the first alignment mark section (13), is continuously provided around the first alignment mark section (13) in a plan view from above, transmits light in a partial wavelength range of visible light, and absorbs light in another wavelength range of visible light; and a solar cell panel (9) as a member to be covered, which is provided below the semi-transparent layer (14), and which is provided with a second alignment mark part (15) through which at least one visible light is transmitted at a position covered by the first alignment mark part (13) when viewed from above.

Description

Technical Field

[0001] The present invention relates to a cover structure for electronic devices such as watches and meters, a watch having the cover structure, and a method for manufacturing the cover structure. Background Art

[0002] For example, in a wristwatch, as described in Patent Document 1, there is known a wristwatch having the following structure: a watch glass is provided at an upper opening of a watch 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.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2004-69626

[0006] In such a wristwatch, in order to prevent the watch movement from being seen through the transparent dial, a light-shielding seal is directly adhered to the upper surface of the watch movement on the inner peripheral side of the solar panel. Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] However, in such a wristwatch, when directly adhering the light-shielding seal to the watch movement, there are problems that it is difficult to align the light-shielding seal with respect to the watch movement, and once adhered, it is difficult to correct.

[0009] The problem to be solved by the present invention is to provide a cover structure capable of accurately aligning components with each other and making the internal structure difficult to be seen, a watch having the cover structure, and a method for manufacturing the cover structure.

[0010] Means for Solving the Problems

[0011] The cover structure of the present invention is characterized by including: a cover member that transmits at least visible light and 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 and continuously provided around the first alignment mark portion when viewed from a certain direction, transmits light in a part of the 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 is provided with at least one second alignment mark portion that transmits visible light at a position covered by the first alignment mark portion when viewed from the certain direction.

[0012] Effects of the Invention

[0013] According to the present invention, components can be accurately aligned with each other, and the internal structure can be made difficult to see. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is an enlarged top view showing an embodiment of a watch to which the present invention is applied.

[0015] Figure 2 is showing Figure 1 an enlarged cross-sectional view of the main part of the watch shown in the A-A direction.

[0016] Figure 3 is Figure 2 an enlarged cross-sectional view of part B of the glass structure shown.

[0017] Figure 4 is a top view of the glass structure shown as viewed from above Figure 1 enlarged.

[0018] Figure 5 is showing Figure 4 an enlarged top view of a watch glass provided with a function display section, a light absorption layer, and a first alignment mark section in the glass structure shown.

[0019] Figure 6 is showing Figure 4 an enlarged top view of a semi-transmissive layer provided on the lower surface of the watch glass shown.

[0020] Figure 7 is showing Figure 4 an enlarged top view of a solar panel adhered to the lower surface of the watch glass shown.

[0021] Figure 8 represents Figure 4 the main part of the glass structure shown, (a) is an enlarged view showing the alignment part of part C on the 9 o'clock side of Figure 4 shown, (b) is an enlarged view showing the alignment part of part D on the 3 o'clock side of Figure 4 shown.

[0022] Figure 9 represents Figure 8 a state in which the second alignment mark section is displaced relative to the first alignment mark section in the alignment state shown, (a) is an enlarged view showing the displacement of the alignment part on the 9 o'clock side, and (b) is an enlarged view showing the displacement of the alignment part on the 3 o'clock side.

[0023] SYMBOL DESCRIPTION

[0024] 1 Watch case

[0025] 2 Case body

[0026] 3 First exterior component

[0027] 4 Second exterior component

[0028] 5 Button switch

[0029] 6 Glass structure

[0030] 7 Rear cover

[0031] 8 Watch glass

[0032] 8a Function display section

[0033] 9 Solar panel

[0034] 9a Unit

[0035] 9b Connection wiring section

[0036] 10 Double-sided adhesive tape

[0037] 11 Adhesive

[0038] 12 Light absorption layer

[0039] 12a Cutout section

[0040] 13 First alignment mark section

[0041] 14 Semi-translucent layer

[0042] 14a Cover section

[0043] 15 Second alignment mark section

[0044] S1 Gap Detailed implementation mode

[0045] Hereinafter, with reference to Figures 1 to 9 , an implementation mode of a watch to which the present invention is applied will be described.

[0046] As Figure 1 and Figure 2 shown, the watch includes a watch case 1. The watch case 1 includes a case main body 2, a first exterior component 3, and a second exterior component 4.

[0047] As Figure 1 and Figure 2 shown, the case main body 2 is formed of a metal such as stainless steel or a synthetic resin with high rigidity. The first exterior component 3 is mounted on the upper outer periphery of the case main body 2 and is formed of an elastic synthetic resin such as polyurethane resin. The second exterior component 4 protects the 9 o'clock side and 3 o'clock side of the first exterior component 3 and is formed of a metal such as stainless steel.

[0048] As Figure 1As shown, button switches 5 are 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 the watch case 1. As Figure 2 shown, on the upper opening side of the watch case 1, that is, the upper part of the case body 2, a glass structure body 6 serving as a cover structure body is provided. In addition, a back cover 7 is installed via a waterproof gasket 7a on the lower part of the watch case 1, that is, the lower part of the case body 2. A clock module (not shown) is provided inside the watch case 1.

[0049] As Figure 2 and Figure 3 shown, the glass structure body 6 includes a watch glass 8 serving as a cover member and a solar panel 9 serving as a covered member. The glass structure body 6 has the following structure: a solar panel 9 is pasted on the lower surface of the watch glass 8 through a transparent (transmitting light of wavelengths in the entire visible light band substantially) double-sided adhesive tape 10. In this case, the watch glass 8 is a transparent (transmitting light of wavelengths in the entire visible light band substantially) glass plate that is at least transmissive to visible light and is formed in a substantially circular plate shape. The outer peripheral portion of the watch glass 8 is disposed on the upper outer peripheral portion of the case body 2 and fixed by an adhesive 11.

[0050] In this case, the solar panel 9 is made of, for example, a semiconductor material such as silicon-based (monocrystalline silicon, polycrystalline silicon, etc.) or gallium-based. Generally, solar panels are mostly black, gray close to black, dark blue, dark purple, etc., and the color of the unit is relatively close to black. The solar panel 9 of the present embodiment is gray close to black.

[0051] As Figure 4 and Figure 5 shown, on the outer peripheral portion of the lower surface of the watch glass 8, a light absorption layer 12 that absorbs visible light is provided in a substantially circular shape by screen printing. For convenience, the outer diameter of the substantially circular light absorption layer 12 when viewed 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 in the case where there are no irregularities such as the cutout portion 12a and the first alignment mark portion 13 described later (the same applies to the semi-transmissive layer 14 described later). The light absorption layer 12 is, for example, a black layer. The light absorption layer 12 is formed such that the outer diameter size is substantially the same as the outer diameter of the watch glass 8, the inner diameter size is substantially the same as the outer diameter of the solar panel 9, or the inner diameter size is less than or equal to the outer diameter of the solar panel 9 and larger than the inner diameter of the solar panel 9. On the lower surface of the watch glass 8 on the inner peripheral side of the light absorption layer 12, a function display portion 8a indicating watch functions and the like is provided in a substantially arc shape along the outer periphery of the solar panel 9. In order to increase the light reception amount of the solar panel 9, it is preferable that the function display portion 8a is printed with a light-transmissive ink.

[0052] In addition, as Figure 8(a) and Figure 8 As shown in (b), semicircular cutout portions 12a are provided on the 9 o'clock side and the 3 o'clock side of the light absorption layer 12 in a manner that opens toward the inner peripheral side of the light absorption layer 12. For convenience, when referring to the inner diameter of the semicircular cutout portion 12a, the diameter of the circle formed by extending the arc of the semicircle when viewed from above is referred to as the inner diameter (the same applies to the outer diameter of the covering portion 14a described later). On the lower surface of the watch glass 8 within each of the cutout portions 12a located 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 screen printing. These first alignment mark portions 13 are each a layer that absorbs visible light, and their outer diameters are formed in a substantially circular shape that is smaller than the inner diameter of each cutout portion 12a.

[0053] As Figure 8 (a) and Figure 8 As shown in (b), these first alignment mark portions 13 are each formed to have an outer diameter size that is substantially the same as the radius of the cutout portion 12a. These first alignment mark portions 13 are provided such that their central portions correspond to the central portions of the cutout portions 12a on the 9 o'clock side and the 3 o'clock side of the light absorption layer 12. Thus, the first alignment mark portions 13 are respectively provided with a gap S1 between their outer peripheral portions and the inner peripheral portions of the cutout portions 12a on the 9 o'clock side and the 3 o'clock side of the light absorption layer 12.

[0054] In this case, the light absorption layer 12 may also reach 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 toward the first alignment mark portion 13, alignment can be performed through the semi-transmissive layer 14, and the gap S1 is hidden in black by the light absorption layer 12 as much as possible.

[0055] Therefore, as Figure 8 (a) and Figure 8 As shown in (b), the light absorption layer 12 is provided so as to avoid contact or overlap with the first alignment mark portion 13. In addition, the first alignment mark portion 13 is provided on the inner peripheral side, i.e., the inner periphery, of the light absorption layer 12, and a part of its outer peripheral edge is provided to protrude more inward than the inner peripheral portion of the light absorption layer 12 from the cutout portion 12a of the light absorption layer 12.

[0056] However, as Figure 3 and Figure 6 shown, a semi-transmissive layer 14 that transmits visible light is provided in a substantially annular shape by medium printing on the lower side of the light absorption layer 12 and the first alignment mark portion 13. This semi-transmissive layer 14 is a semi-transparent layer that improves the adhesiveness to the housing main body 2, the light absorption layer 12, and the first alignment mark portion 13, and is colored, for example, with a black pigment.

[0057] The semi-transmissive layer 14 does not have a transmittance of 100% at all wavelengths in the visible light region, but absorbs at least a part of the wavelengths such as the wavelengths in the blue region (400 - 500 nm), the red region (650 - 750 nm), and the green region (500 - 550 nm). The semi-transmissive layer 14 of the present embodiment is a layer that transmits light of wavelengths in the entire visible light band equally. In addition, the expression "semi-transmissive" is used for convenience, and as will be described later, it does not mean a transmittance of 50%. The 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.

[0058] As Figure 6 and Figure 8 shown, covering portions 14a are respectively provided at the 9 o'clock side and the 3 o'clock side portions of the semi-transmissive layer 14. The covering portions 14a cover the respective cut portions 12a of the light absorption layer 12 and the first alignment mark portion 13 from below. These covering portions 14a are formed in a substantially semi-circular shape with an outer diameter slightly larger than the inner diameter of the cut portion 12a of the light absorption layer 12. Therefore, the covering portions 14a are smoke screen portions that form a smoke screen (obstruction) by transmitting visible light to a certain extent, and are provided to protrude 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 cut portion 12a.

[0059] Thus, as Figure 8 (a) and Figure 8 (b) shown, the covering portions 14a transmit visible light to a certain extent at the portions corresponding to the gap S1 between the outer peripheral portion of the first alignment mark portion 13 and the inner peripheral portion of the cut portion 12a and at the portions adjacent to the peripheral edge surrounding the first alignment mark portion 13 located on the inner periphery of the light absorption layer 12 (that is, at the portions continuous around the light absorption layer 12 and the first alignment mark portion 13). In this case, the transmittance of the semi-transmissive layer 14 and the covering portions 14a is 5% - 15%, preferably 10%.

[0060] In addition, the transmittance of each of the light absorption layer 12 and the first alignment mark portion 13 is set to be lower than the transmittance of the semi-transmissive layer 14 and the covering portions 14a. That is, when the transmittance of the semi-transmissive layer 14 and the covering portions 14a is about 10%, the transmittance of each of the light absorption layer 12 and the first alignment mark portion 13 is 0% - 5%, preferably 0% (visible light does not pass through at all).

[0061] On the other hand, as Figure 4 and Figure 7As shown, the solar panel 9 adhered to the lower surface of the watch glass 8 is formed in a substantially circular ring shape such that its outer diameter is approximately the same as the inner diameter of the light absorption layer 12 or the outer diameter is larger than the inner diameter of the light absorption layer 12, and the inner diameter is smaller than the arrangement area of the function display portion 8a of the watch glass 8. The solar panel 9 receives external light transmitted through the watch glass 8 to generate an electromotive force, and a plurality of cells 9a are arranged in a circular ring. The solar panel 9 is electrically connected to a watch module (not shown) in the watch case 1 through a connection wiring portion 9b provided on its outer periphery and connected to the plurality of cells 9a.

[0062] As Figure 7 and Figure 8 shown, second alignment marking portions 15 covered by the first alignment marking portions 13 are respectively provided at the outer peripheral portions on the 9 o'clock side and the 3 o'clock side of the solar panel 9. As Figure 3 shown, these second alignment marking portions 15 are respectively circular through holes penetrating the upper and lower surfaces of the solar panel 9, and their outer diameters are formed smaller than the outer diameter of the first alignment marking portions 13.

[0063] Thus, as Figure 8 (a) and Figure 8 (b) shown, in the glass structure 6, visible light is irradiated from the lower side of the solar panel 9 toward the second alignment marking portion 15, and the irradiated visible light irradiates the covering portion 14a of the semi-translucent layer 14 through the through hole of the second alignment marking portion 15. A part of the irradiated visible light transmits through the covering portion 14a of the semi-translucent layer 14 and irradiates the first alignment marking portion 13. When the irradiated visible light is almost completely absorbed by the first alignment marking portion 13, it is detected that the solar panel 9 has been accurately aligned with the lower surface of the watch glass 8.

[0064] In addition, in the glass structure 6, when the visible light irradiated from the lower side of the solar panel 9 toward the second alignment marking portion 15 is not completely absorbed by the first alignment marking portion 13, as Figure 9 (a) and Figure 9 (b) shown, the visible light leaks above the first alignment marking portion 13. When the leaked visible light can be seen from above the watch glass 8, it is detected that the second alignment marking portion 15 has been displaced relative to the first alignment marking portion 13.

[0065] In this embodiment, as Figure 9 (a) and Figure 9As shown in (b), a situation where the second alignment mark portion 15 of the glass structure 6 is not allowed to be exposed due to a positional deviation relative to the first alignment mark portion 13 is not permitted. In this embodiment, the portion where a smoke screen (obstruction) is to be formed is the portion that can be seen from the gap S1 and is generated between the light absorption layer 12 and the solar panel 9 (or the first alignment mark portion 13). These portions are hidden by the semi-translucent layer 14's covering portion 14a's semi-translucency to form a smoke screen and are thus difficult to see.

[0066] Accordingly, in the glass structure 6, the clock module (not shown) inside the watch case 1 is hidden by the covering portion 14a of the semi-translucent layer 14 so as not to be seen from the outside through the portion where a smoke screen (obstruction) is to be formed and can be seen from the gap S1. In addition, the light absorption layer 12, the first alignment mark portion 13, the semi-translucent layer 14, and the solar panel 9 are of the same color system, further hiding the clock module (not shown) inside the watch case 1 in a manner that is difficult to see from the outside. In addition, the same color system in this embodiment refers to black, colors close to black (gray close to black, dark blue, dark purple), etc. However, in the case where 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-translucent layer 14 can also be set to be bluish.

[0067] Next, a manufacturing method for manufacturing such a glass structure 6 of a watch will be described.

[0068] This manufacturing method includes: a first step of providing the first alignment mark portion 13 and the semi-translucent 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 of the second alignment mark portion 15 and the first alignment mark portion 13; and a fourth step of pasting the aligned solar panel 9 onto the watch glass 8.

[0069] 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 screen printing. In this case, the light absorption layer 12 is formed in a substantially circular shape at the peripheral end portion of the lower surface of the watch glass 8. At this time, 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, and the first alignment mark portion 13 is provided in each of these cutout portions 12a.

[0070] In this case, the first alignment mark portion 13 is formed in a circular shape with an area smaller than that of the cutout portion 12a, and a gap S1 is provided between the outer peripheral portion thereof and the inner peripheral portion of the cutout portion 12a. In addition, the first alignment mark portion 13 is provided in such a manner that a part of its outer peripheral portion, that is, the outer peripheral edge located on the inner peripheral side of the light absorption layer 12, protrudes from the cutout portion 12a toward the inner peripheral side of the light absorption layer 12.

[0071] In addition, in this first process, a semi-transmissive layer 14 is formed by dielectric printing on the lower surface of the watch glass 8 including the light absorption layer 12 and the first alignment mark portion 13. The 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 in a semi-circular shape from the inner peripheral portion of the semi-transmissive layer 14 in a state of overlapping with the peripheral portion of the cutout portion 12a.

[0072] Thus, as Figure 8 (a) and Figure 8 (b) show, the covering portions 14a transmit visible light to a certain extent in a state of covering 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 cutout portion 12a and the portion adjacent to and corresponding to the outer periphery around the first alignment mark portion 13 located inside the light absorption layer 12.

[0073] In the second process, second alignment mark portions 15 are provided at the 9 o'clock side and the 3 o'clock side portions of the solar panel 9, respectively. These second alignment mark portions 15 are through-holes that transmit light, and the inner diameter thereof is formed to be smaller than the outer diameter of the first alignment mark portion 13. Thus, when the second alignment mark portions 15 are disposed corresponding to the lower side of the first alignment mark portion 13, they are covered by the first alignment mark portion 13.

[0074] In the third process, visible light is irradiated from the lower side of the solar panel 9 toward the watch glass 8 side to detect the alignment of the second alignment mark portion 15 of the solar panel 9 and the first alignment mark portion 13 of the watch 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 passes through the through-hole of the second alignment mark portion 15 and irradiates the covering portion 14a of the semi-transmissive layer 14, and a part of the irradiated visible light transmits through the covering portion 14a of the semi-transmissive layer 14 and irradiates the first alignment mark portion 13.

[0075] 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 watch glass 8. In addition, 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. As Figure 9 (a) and Figure 9 (b) show, when the visible light leaks above the first alignment mark portion 13 and the leaked visible light can be seen from above the watch glass 8, it is detected that the second alignment mark portion 15 is displaced relative to the first alignment mark portion 13.

[0076] In this embodiment, as Figure 9 (a) and Figure 9As shown in (b), a situation where the second alignment mark portion 15 of the glass structure body 6 is exposed due to a positional deviation relative to the first alignment mark portion 13 is not allowed. Therefore, in this embodiment, the portion where a smoke screen (obstruction) is to be formed is the portion that can be seen from the gap S1 and is generated between the light absorption layer 12 and the solar panel 9 (or the first alignment mark portion 13). In particular, when observing this portion from an inclined direction, the internal structure such as a clock module (not shown) inside the watch case 1 can be seen. According to this embodiment, these portions are hidden and made difficult to see by forming a smoke screen through the semi-translucency of the covering portion 14a of the semi-translucent layer 14.

[0077] In the fourth process, the aligned solar panel 9 is adhered to the watch glass 8 using a transparent double-sided adhesive tape 10. That is, in a state where the second alignment mark portion 15 of the solar panel 9 is aligned with the first alignment mark portion 13 of the watch glass 8, the solar panel 9 is adhered to the lower surface of the watch glass 8 using the transparent double-sided adhesive tape 10. Therefore, the solar panel 9 can receive external light through the transparent double-sided adhesive tape 10. Thus, the glass structure body 6 is manufactured.

[0078] The glass structure body 6 manufactured in this way, as Figure 3 shown, the watch glass 8 is disposed on the upper outer peripheral portion of the case main body 2 and fixed by an adhesive 11. In this state, as Figure 2 shown, when the first exterior member 3 is installed on the upper outer periphery of the case main body 2, the outer peripheral portion of the upper surface of the watch glass 8 is pressed by the second exterior member 4.

[0079] Then, the second exterior member 4 is installed on the 3 o'clock side and 9 o'clock side of the first exterior member 3. Thus, the watch case 1 is assembled. A clock module (not shown) is provided inside the watch case 1, and in this state, the back cover 7 and the waterproof gasket 7a are installed together on the lower part of the watch case 1. Thus, the watch is assembled.

[0080] In this way, according to the glass structure body 6 of this watch, since it has the following structure, the watch glass 8 and the solar panel 9 can be accurately aligned, and the internal structure can be made difficult to see. That is, it has: a watch glass 8, which is a cover member that transmits at least visible light, and at least one first alignment mark portion 13 that absorbs visible light is provided on the watch glass 8; a semi-translucent layer 14, which is provided below the first alignment mark portion 13 and is continuously provided around the first alignment mark portion 13 when viewed from a certain direction, that is, from above, transmits light in a part of the wavelength range of visible light, and absorbs light in other wavelength ranges of visible light; and a solar panel 9 as a covered member, which is provided below the semi-translucent layer 14, and when viewed 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.

[0081] That is, in the glass structure 6 of the watch, 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 transmitted through the second alignment mark portion 15 (through-hole) passes through the covering portion 14a of the semi-translucent layer 14 and irradiates the first alignment mark portion 13. The irradiated visible light is almost completely absorbed by the first alignment mark portion 13, whereby it can be detected that the solar panel 9 has been accurately aligned with the lower surface of the watch glass 8.

[0082] In addition, in the glass structure 6 of the watch, the watch glass 8 has a substantially annular light absorption layer 12 that absorbs visible light at least at the peripheral end portion of the watch glass 8 that can be visually confirmed when viewed from above. Thus, the light absorption layer 12 can absorb the external light transmitted through the watch glass 8, whereby the intrusion of external light from the peripheral portion of the watch glass 8 can be prevented, and thus it is difficult to see the lower side of the peripheral end portion of the watch glass 8 from the outside.

[0083] In addition, in the glass structure 6 of the watch, when viewed from above, the light absorption layer 12 is provided so as to avoid at least a part of the first alignment mark portion 13. Thus, the light absorption layer 12 does not contact or overlap with the first alignment mark portion 13, and the light absorption layer 12 and the first alignment mark portion 13 can be set well, whereby a gap S1 can be provided between the light absorption layer 12 and the first alignment mark portion 13. Therefore, a part of the visible light can pass through the gap S1 and be transmitted.

[0084] In this case, in the glass structure 6 of the watch, a semi-circular cutout portion 12a is provided on the light absorption layer 12 so as to open toward the inner peripheral side of the light absorption layer 12. On the lower surface of the watch glass 8 located within the cutout portion 12a, the first alignment mark portion 13 that absorbs visible light is provided with a gap S1 therebetween. Thus, a part of the visible light can pass through the gap S1 between the outer peripheral portion of the first alignment mark portion 13 and the inner peripheral portion of the cutout portion 12a of the light absorption layer 12 and be transmitted.

[0085] That is, in the glass structure 6 of the watch, 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 of the light absorption layer 12, and the central portion of the first alignment mark portion 13 is arranged corresponding to the central portion of the cutout portion 12a of the light absorption layer 12. Thus, the light absorption layer 12 and the first alignment mark portion 13 do not contact or overlap, and a gap S1 can be reliably and well provided between the outer peripheral portion of the first alignment mark portion 13 and the inner peripheral portion of the cutout portion 12a of the light absorption layer 12.

[0086] In addition, in the glass structure 6 of the watch, when viewed from above, the first alignment mark portion 13 is provided on the inner periphery of the light absorption layer 12, whereby the second alignment mark portion 15 can be easily provided below the first alignment mark portion 13, and thus the alignment detection of the second alignment mark portion 15 with respect to the first alignment mark portion 13 can be easily performed.

[0087] That is, in the glass structure 6 of the watch, the first alignment mark portion 13 is provided on the inner peripheral side, i.e., the inner periphery, of the light absorption layer 12, and a part of the outer peripheral edge of the first alignment mark portion 13 is disposed so as to protrude more inward from the cutout portion 12a of the light absorption layer 12 than the inner peripheral portion of the light absorption layer 12, whereby the alignment detection of the second alignment mark portion 15 with respect to the first alignment mark portion 13 can be easily performed. In addition, by providing the first alignment mark portion 13 on the inner periphery of the light absorption layer 12 (by causing the first alignment mark portion 13 to be recessed on the inner peripheral edge of the light absorption layer 12), the first alignment mark portion 13 can be made to appear substantially integrated with the light absorption layer 12, and thus, a reduction in aesthetics due to the inward protrusion of the first alignment mark portion 13 can be prevented.

[0088] In addition, in the glass structure 6 of the watch, the solar panel 9 is a member having a substantially annular shape, and the inner diameter of the light absorption layer 12 is equal to or less than the outer diameter of the solar panel 9. Thereby, the outer peripheral portion of the solar panel 9 can be reliably covered by the light absorption layer 12, and thus the internal structure can be made difficult to see. In addition, by making the inner diameter of the light absorption layer 12 equal to or less than the outer diameter of the solar panel 9, the cutout portion 12a is provided more inwardly, and thus the gap S1 can be reduced. That is, the internal structure can be made difficult to see.

[0089] In addition, in the glass structure 6 of the watch, when viewed from above, the semi-translucent layer 14 has a covering portion 14a continuously provided around the light absorption layer 12 and the first alignment mark portion 13. Thereby, the gap S1 between the first alignment mark portion 13 and the light absorption layer 12 can be reliably covered by the covering portion 14a, and thus the internal structure such as a clock module (not shown) in the watch case 1 can be made difficult to be seen through the gap S1 between the first alignment mark portion 13 and the light absorption layer 12.

[0090] That is, in the glass structure 6 of the watch, the covering portion 14a is provided so as to protrude in a semicircular shape from the inner peripheral portion of the semi-translucent layer 14 in a state of overlapping with the peripheral portion of the cut portion 12a of the light absorption layer 12. Therefore, the covering portion 14a can reliably cover 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 cut portion 12a, and the portion adjacent to the peripheral edge surrounding the first alignment mark portion 13 located inside the light absorption layer 12. Moreover, in addition to allowing a part of visible light to be transmitted to a certain extent, the internal structures such as the clock module (not shown) inside the watch case 1 can be made difficult to see by the covering portion 14a.

[0091] In addition, in the glass structure 6 of the watch, since the light transmittance of the first alignment mark portion 13 and the light absorption layer 12 is lower than that of the semi-translucent layer 14, even if a part of visible light is transmitted through the semi-translucent 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.

[0092] That is, in the glass structure 6 of the watch, the light transmittance of the semi-translucent layer 14 and the covering portion 14a is 5% - 15%, preferably 10%. When the light transmittance of the semi-translucent 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% - 5%, preferably 0% (visible light does not pass through at all).

[0093] Thus, in the glass structure 6 of the watch, the first alignment mark portion 13 and the light absorption layer 12 can almost completely absorb the visible light transmitted through the semi-translucent layer 14 and the covering portion 14a, and particularly, the position of the second alignment mark portion 15 can be grasped through the covering portion 14a during alignment detection. That is, by providing the semi-translucent layer 14 and the covering portion 14a, alignment detection can be performed, and when using the watch adopting the glass structure 6, it is difficult to see the internal structures such as the clock module (not shown) inside the watch case 1 through the gap S1.

[0094] In addition, in the glass structure 6 of the watch, the second alignment mark portion 15 is a through hole, and its outer diameter is smaller than that of the first alignment mark portion 13. Therefore, the first alignment mark portion 13 can reliably cover the second alignment mark portion 15. Thus, even if the visible light that irradiates the second alignment mark portion 15 and is transmitted irradiates the first alignment mark portion 13, the irradiated visible light can be reliably absorbed. Therefore, the solar panel 9 and the clock glass 8 can be accurately aligned.

[0095] That is, in the glass structure 6 of the watch, when visible light is irradiated from the lower side of the solar panel 9 toward the second alignment marking portion 15, a part of the visible light that has passed through the through-hole of the second alignment marking portion 15 transmits through the covering portion 14a of the semi-translucent layer 14, and the transmitted visible light is almost completely absorbed by the first alignment marking portion 13. Therefore, it is possible to detect that the solar panel 9 has been accurately aligned with the lower surface of the watch glass 8.

[0096] In addition, in the glass structure 6 of the watch, a part of the visible light irradiated from the lower side of the solar panel 9 toward the second alignment marking portion 15 is not completely absorbed by the first alignment marking portion 13. As Figure 9 (a) and Figure 9 (b) show, a part of the visible light leaks above the first alignment marking portion 13. When the leaked visible light can be seen from above the watch glass 8, it is possible to detect that the second alignment marking portion 15 has been slightly displaced relative to the first alignment marking portion 13.

[0097] Therefore, regarding the light transmittance of the light absorption layer 12 and the first alignment marking portion 13, and the light transmittance of the semi-translucent layer 14 and the covering portion 14a, it is sufficient that their light transmittance satisfies at least the following relationship: a state in which it is possible to detect, by visual inspection or using a light sensor or the like from above the watch glass 8, that the second alignment marking portion 15 has been slightly displaced relative to the first alignment marking portion 13 and a part of the visible light has leaked above the first alignment marking portion 13.

[0098] In addition, in the glass structure 6 of the watch, as Figure 9 (a) and Figure 9 (b) show, a situation where the second alignment marking portion 15 of the glass structure 6 is displaced relative to the first alignment marking portion 13 and is exposed is not allowed. In the glass structure 6 of the watch, the portions where it is desired to form a smoke screen (obstruction) are the portions that can be seen from the gap S1 and are generated between the light absorption layer 12 and the solar panel 9 (or the first alignment marking portion 13). These portions can be hidden by forming a smoke screen through the semi-translucency of the covering portion 14a of the semi-translucent layer 14 so that they are difficult to see.

[0099] In addition, according to the manufacturing method of the glass structure 6 of the watch, the timepiece glass 8 and the solar panel 9 can be accurately aligned and the internal structure can be made difficult to see by performing the following steps: a first step of providing at least one first alignment mark portion 13 that absorbs visible light on the timepiece glass 8, which is a cover member that transmits at least visible light, and continuously providing a semi-transmissive layer 14 around the first alignment mark portion 13 when viewed from above, the semi-transmissive layer 14 transmitting light in a part of the wavelength range of visible light and absorbing light in other wavelength ranges of visible light; 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, when viewed from above; and a third step of irradiating visible light from the side of the solar panel 9 toward the timepiece glass 8 to detect the alignment of the second alignment mark portion 15 of the solar panel 9 and the first alignment mark portion 13 of the timepiece glass 8.

[0100] That is, in the manufacturing method of the glass structure 6 of the watch, when aligning the solar panel 9 and the timepiece 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 passing through the through-hole of the second alignment mark portion 15 is irradiated onto the first alignment mark portion 13 through the covering portion 14a of the semi-transmissive layer 14. The irradiated visible light is almost completely absorbed by the first alignment mark portion 13, whereby it can be detected that the solar panel 9 has been accurately aligned with the lower surface of the timepiece glass 8.

[0101] In addition, in the manufacturing method of the glass structure 6 of the watch, 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 is transmitted through the covering portion 14a of the semi-transmissive layer 14, and a part of the transmitted visible light is not completely absorbed by the first alignment mark portion 13. As Figure 9 (a) and Figure 9 (b) show, a part of the visible light leaks above the first alignment mark portion 13. When the leaked visible light can be seen from above the timepiece glass 8, it can be detected that the second alignment mark portion 15 is slightly displaced relative to the first alignment mark portion 13.

[0102] In the manufacturing method of the glass structure 6 of the watch, a situation where the second alignment mark portion 15 of the solar panel 9 is slightly displaced relative to the first alignment mark portion 13 and exposed is not allowed in the third step. Here, the portions in the glass structure 6 where it is desired to form a smoke screen (obscuration) are the portions generated between the light absorption layer 12 and the solar panel 9 (or the first alignment mark portion 13) that can be seen from the gap S1. These portions can be hidden by the semi-transmission of the covering portion 14a of the semi-transmissive layer 14 to form a smoke screen so that they are difficult to see.

[0103] It should be noted that although in the above-described embodiment, the shapes of the first alignment mark portion 13 and the second alignment mark portion 15 are respectively circular, the present invention is not limited thereto. For example, the shapes of the first alignment mark portion 13 and the second alignment mark portion 15 may be respectively formed into quadrilateral shapes.

[0104] In addition, although 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 respectively provided on the 3 o'clock side and the 9 o'clock side is described, the present invention is not limited thereto. It is not necessarily required to be provided on the 3 o'clock side and the 9 o'clock side. It may also be a structure in which a first alignment mark portion and a second alignment mark portion having a quadrilateral shape or the like 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.

[0105] In addition, although 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 is described, the present invention is not limited thereto. As long as they are on substantially the same circumference, they can be provided at any position. In addition, it is not necessarily required to be provided at two positions. It may be provided at only one position. Furthermore, it may also be provided at three or more positions.

[0106] In addition, although 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 formed into a circular shape or a quadrilateral shape is described, the present invention is not limited thereto. For example, they may also be polygons such as pentagons and hexagons, or shapes such as ellipses.

[0107] In addition, although in the above-described embodiment, the case where the solar panel 9 is formed into a substantially ring shape is described, the present invention is not limited thereto. The solar panel may also be formed into a circular shape.

[0108] Moreover, although in the above-described embodiment, the case of being applied to a watch is described, the present invention is not necessarily a watch. For example, it can be applied to various timepieces such as travel watches, alarm clocks, table clocks, and wall clocks. In addition, the present invention is not necessarily a timepiece and can also be applied to electronic devices such as measuring instruments.

Claims

1. A cover structure, characterized in that: have: a cover member which transmits at least visible light and is provided with at least one first alignment mark portion which absorbs visible light; a semi-transmissive layer disposed below the first alignment mark portion and continuously disposed around the first alignment mark portion when viewed from a certain direction, transmitting light of a part of the wavelength range of visible light and absorbing light of other wavelength ranges of visible light; as well as The covered member is disposed below the semi-transmissive layer and has at least one second alignment mark portion that transmits visible light at a position covered by the first alignment mark portion when viewed from the certain direction.

2. The cover structure according to claim 1, characterized in that: The cover member has a substantially annular light absorbing layer that absorbs visible light at a peripheral end portion that can be visually confirmed when viewed in plan from at least the one direction.

3. The cover structure according to claim 2, characterized in that: The light absorbing layer is provided so as to avoid at least a portion of the first alignment mark portion when viewed from above in the certain direction.

4. The cover structure according to claim 3, characterized in that: When viewed from the above-mentioned direction, the above-mentioned first alignment mark portion is arranged on the inner periphery of the above-mentioned light absorbing layer.

5. The cover structure according to claim 4, characterized in that: The covered member is a member in any of a substantially circular shape and 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.

6. The cover structure according to claim 5, characterized in that: The semi-transmissive layer includes a covering portion continuously provided around the light absorbing layer and the first alignment mark portion when viewed in a plan view from the certain direction.

7. The cover structure according to claim 2, characterized in that: The light transmittance of the first alignment mark and the light absorbing layer is lower than the light transmittance of the semi-transparent layer.

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

9. A timepiece, characterized in that: A cover structure according to any one of claims 1 to 8 is provided.

10. A method for manufacturing a cover structure, characterized in that: have: In a first step, at least one first alignment mark portion that absorbs visible light is provided on a cover member that transmits at least visible light, and a semi-transparent layer is continuously provided around the first alignment mark portion when viewed from a certain direction, the semi-transparent layer transmitting light in a part of the wavelength range of visible light and absorbing light in other wavelength ranges of visible light; A second step of providing at least one second alignment mark portion that transmits visible light at a position of the covered component covered by the first alignment mark portion when viewed from the above-mentioned direction; and In a third step, visible light is irradiated 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.

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