Electronic devices and their assembly methods

Abstract

The present invention provides an electronic device capable of generating solar power more efficiently and a method for assembling the electronic device. The electronic watch (1) comprises: a cylindrical housing (12) having an opening at at least at the upper end; a dial (13) located inside the housing (12) and exposed at the upper end; a light-transmitting partition (15) having an annular shape along the inner circumferential surface of the housing (12); an annular solar panel (16) located below the partition (15); and an annular pad (19) fixing the outer edge of the solar panel (16).

Description

Technical Field

[0001] This disclosure relates to an electronic device and a method for assembling the electronic device. Background Technology

[0002] In portable electronic devices used in a wide range of environments, a transparent windproof glass is installed at the location covering the display screen to properly protect it and provide waterproofing and dustproofing. Furthermore, in portable electronic devices, the light incident through this windproof glass is often used for solar power generation.

[0003] Previously, some solar panels were located overlapping with the display surface (display unit) of a watch. In this case, in electronic devices that use pointers for display, the shadow of the pointers caused a problem: the power generation efficiency was low relative to the area. On the other hand, Japanese Patent Application Publication No. 2003-270366 disclosed an electronic watch in which the solar panel was mounted along the side of the space between the display unit and the windshield.

[0004] However, this method has the following problem: if light is incident from the side, it is easy to create a shadow on part of the side depending on the orientation of the electronic device, which sometimes results in reduced power generation efficiency.

[0005] The purpose of this disclosure is to provide an electronic device capable of generating solar power more efficiently, and a method for assembling the electronic device. Summary of the Invention

[0006] An electronic device according to one aspect of this disclosure includes:

[0007] A cylindrical shell, with at least an opening at the top;

[0008] The display unit is located inside the housing and protrudes from the upper end side;

[0009] A light-transmitting partition component, which runs along the inner circumferential surface of the housing and has an annular shape;

[0010] A ring-shaped solar cell is located below the separating member; and

[0011] A ring-shaped elastic component secures the outer edge of the solar cell.

[0012] Other features of the invention will be described in detail below with reference to the accompanying drawings, which illustrate exemplary embodiments. Attached Figure Description

[0013] Figure 1 (a) is a top view / top view of an electronic watch, which is the electronic device of this embodiment.

[0014] Figure 1 (b) is a bottom view of the electronic watch.

[0015] Figure 2 It is a cross-sectional view through the center of the electronic watch.

[0016] Figure 3 (a) is a diagram illustrating a solar panel.

[0017] Figure 3 (b) is a diagram illustrating the solar panel.

[0018] Figure 4 This is a top view showing an example of a partition.

[0019] Figure 5 This is a diagram showing the assembly and manufacturing process of an electronic watch. Detailed Implementation

[0020] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0021] Figure 1 (a) is a top view / above view of the electronic watch 1, which is the electronic device of this embodiment. Figure 1 (b) is a bottom view of the electronic watch. In this bottom view, the back cover 18 is removed (see reference). Figure 2 The state is represented by ).

[0022] The electronic watch 1 includes a housing 12, a dial 13, hands 14, a divider 15 (divider component), and a circuit board 20. Furthermore, a solar panel 16 (solar cell) can be seen below the divider 15. Additionally, the hands 14 are covered by a light-transmitting, transparent windproof glass 17 (light-transmitting component, see reference 14). Figure 2 The hands 14 are positioned between the dial 13 and the windshield 17 (on the dial 13) in a manner that allows them to rotate in a plane substantially parallel to the dial 13. Decorative parts 21, such as bezels, may also be appropriately mounted on the outside of the housing 12.

[0023] The housing 12 has a cylindrical shape with openings at the top and bottom. Inside this cylindrical space (the inner side of the housing 12), in addition to the aforementioned dial 13, pointer 14, partition plate 15, and circuit board 20, it also houses a gear train mechanism that includes a gear system for rotating the pointer 14, a drive unit such as a stepper motor, and a battery 22 (secondary battery). The lower end of the housing 12 is covered by a rear cover 18 (see reference). Figure 2 The upper part is sealed by the aforementioned windproof glass 17, preventing water, dust, and other contaminants from entering. The housing 12 can be made of stainless steel or similar materials, but is not particularly limited to these materials.

[0024] The dial 13 is exposed at the upper end of the case 12. Markers 131 (time characters) for determining the time are located on the upper surface (exposed side) of the dial 13 in 1-hour units (every 30 degrees). Alternatively, graduations for indicating minutes, seconds, etc., may be further provided on the upper surface of the dial 13.

[0025] The center of the dial 13 serves as the axis of rotation for at least a portion of the hands 14 (hour hand, minute hand, and second hand, etc.). Other hands 14 may also be small hands that rotate only within a small window 132 occupying a portion of the upper surface of the dial 13.

[0026] The dial 13 and the pointer 14 constitute the display section of this embodiment.

[0027] The divider 15 is a ring-shaped component located near the upper end of the inner circumferential surface of the housing 12, defining the visual range of the user on the dial 13. The phrase "near the upper end of the inner circumferential surface" does not mean it is in contact with the upper end; furthermore, the upper surface of the divider 15 may be located below the upper end of the housing 12. In this embodiment, the divider 15 of the electronic watch 1 is a light-transmitting component, such as resin. The divider 15 does not need to be transparent; it can also be a colored light-transmitting component.

[0028] Solar panel 16 refers to solar cells, and solar cell unit 160 (refer to...) Figure 3 (a) Multiple solar panels arranged in a ring shape are located below the separator 15 and generate electricity by receiving light incident through the separator 15. The ring shape mentioned here can be either completely connected in a circumferential shape or (for example, between solar cell cells 160) have several interrupted gaps. It should be noted that the solar panel 16 can also be a film that is thinner and less rigid than a plate-shaped panel.

[0029] The circuit board 20 is located on the back side (lower side) inside the housing 12 and is powered by a wiring board 161 extending from the solar panel 16. The operation of the circuit board 20 includes the operation of an electronic watch, namely, the operation of a timing unit that counts the current time, and the operation of a drive unit that rotates the pointer 14 according to the current time and the operation of a display control unit that displays the current time through the pointer 14.

[0030] Figure 2 It is through the center of electronic watch 1. Figure 1 (b) A sectional view perpendicular to the bottom surface along section line A-A. In this figure, pointer 14 is omitted.

[0031] Inside the housing 12, the drive unit of the pointer 14 and the circuit board 20 are located below the dial 13, and the open surface on the lower side of the housing 12 is sealed by the back cover 18. In addition, a windproof glass 17 (light-transmitting component) is embedded at the upper end of the inner circumferential surface of the housing 12.

[0032] The upper part of the inner side of the housing 12 is stepped outward, and the upper end of this part becomes the opening of the housing 12. The solar panel 16 is located on the annular stepped surface 121 along this stepped portion. The inner diameter of the housing 12 above the stepped surface 121 is larger than the inner diameter of the housing 12 below the stepped surface 121. The partition plate 15 located above the solar panel 16 is embedded in a wide space above the stepped surface 121 of the housing 12 along its inner circumferential surface via an annular gasket 19 (elastic member). That is, the partition plate 15 does not directly contact the housing 12.

[0033] The lower end of the pad 19 reaches the step surface 121, and the outer edge of the solar panel 16 is fixed to the step surface 121 by the pad 19. Therefore, there is no need to use adhesives, double-sided tape, or other bonding components in fixing the solar panel 16, and there is no aesthetic reduction due to the fact that these bonding components can be visually confirmed through the partition plate 15. Furthermore, since there are no bonding components, the solar panel 16 is less likely to shift from its intended position, and in particular, it is less likely to lift up from the step surface 121 and come into contact with the partition plate 15.

[0034] Additionally, a portion of the pad 19 is also sandwiched between the solar panel 16 and the separator 15, thereby separating the solar panel 16 from the separator 15. Therefore, the cross-sectional shape of the pad 19 can also be formed as follows: Figure 2 The L-shaped shape shown. Additionally, as... Figure 2 As shown, the horizontal length (radial width of the open surface of the housing 12) of the portion of the pad 19 sandwiched between the solar panel 16 and the separator 15 can be sufficiently short compared to the horizontal length of the separator 15. If the solar panel 16 and the separator 15 are in contact, moiré patterns will be generated when viewed from above due to the refraction and interference of light between them. Therefore, the solar panel 16 and the separator 15 are fixed in a separated state, thereby suppressing the generation of moiré patterns. Furthermore, if the separator 15 is embedded while it is in contact with the solar panel 16, it will damage the contact surface, leading to a decrease in aesthetics and power generation efficiency. Therefore, by separating the two, such damage can also be suppressed.

[0035] The gasket 19 is made of a conventionally known elastic resin component such as rubber, and may also be waterproof. On the stepped portion of the inner side of the housing 12, there is an annular recess 122 in the part that contacts the gasket 19. Due to the insertion of the partition plate 15, the gasket 19 is compressed, and a portion expands inward into the recess 122, thereby preventing the gasket 19 from expanding upward along the inner side of the housing 12. This reduces the aesthetic degradation when viewing the electronic watch 1 from the top surface.

[0036] One end of the wiring board 161 (wiring section) is connected to the solar panel 16. The wiring board 161 extends downwards in a curved shape along the inner side of the housing 12 from this end, and its front end (the other end) is connected to the circuit board 20. The wiring board 161 is flexible, allowing for easy adjustment of its curved shape. Two signal lines extend from the wiring board 161, and a voltage difference generated by power generation is applied between these signal lines, transmitting the generated power to the power supply circuit of the circuit board 20.

[0037] The wiring board 161 can be integrated with the solar panel 16, or it can be a different component from the solar panel 16 but connected and fixed to the solar panel 16.

[0038] The branch point of the wiring board 161 from the solar panel 16 is located outside the inner edge of the annular solar panel 16. Therefore, even if the minimum value of the curvature of the curved shape of the wiring board 161 is significantly reduced, the wiring board 161 will not extend much inside the inner edge of the solar panel 16 (even if it does not extend or extends, its width becomes very small).

[0039] Figure 3 (a) and Figure 3 (b) is a top view of the solar panel 16 with the electronic watch 1 removed and unfolded.

[0040] like Figure 3 As shown in (a), multiple, specifically six, solar cell units 160 in this case are arranged circumferentially in the solar panel 16. The solar panel 16 has a cutout portion 16a on its inner edge (inner circumferential side), from which a wiring board 161 branches off. The wiring board 161 has a hole 16b at its front end (the other end), and is secured to the circuit board 20 by screws (including all screw components, but could also be screws, bolts, etc.) passing through the hole 16b. Wiring (signal lines) extending to the wiring board 161 are fixed in contact with the terminals of the circuit board 20, thereby supplying the generated electricity from the solar panel 16 to the circuit board 20.

[0041] It should be noted that, when viewed from above, the cutout portion 16a, the connection position between the wiring board 161 and the solar panel 16, and the stepped surface 121 below the cutout portion 16a can be visually confirmed through the partition plate 15. Therefore, the visually confirmed portion of the stepped surface 121 can be processed to a color similar to that of the solar panel 16. Conversely, as... Figure 3 As shown in (b), the coating film 162 can also be provided by vapor-depositing metal or the like in a manner that makes the portion of the solar panel 16 including the cut-out portion 16a and other parts similar in color to the step surface 121, thereby forming a pattern on the solar panel 16 as a whole, with the coating film 162 and the step surface 121. The pattern could be, for example, stripes with the coating film 162 evenly spaced at certain angles. The power generation efficiency of the portion with the vapor-deposited metal decreases (depending on the thickness and type of the coating film 162, for example, about 50% without the coating film 162), but if the vapor-deposited area is small enough compared to the whole, the decrease in overall power generation efficiency will not be a problem. For example, since there are gaps at the boundaries of the plurality of solar cell cells 160 where no power generation occurs, the coating film 162 can also be located at the location including these boundaries. This further suppresses the decrease in power generation efficiency.

[0042] Or, such as Figure 4 As shown in the top view of an example of the partition plate 15, the solar panel 16 may also not have a coating 162, but rather a portion of the lower surface (bottom side) of the partition plate 15, corresponding to the portion of the solar panel 16 that is not to be visible, is coated with a coating 151. In this case, the orientation of the partition plate 15, particularly its orientation with respect to the direction of rotation, also needs to be properly aligned with the solar panel 16.

[0043] Figure 5 This is a diagram illustrating the assembly and manufacturing process of the electronic watch 1. In the assembly and manufacturing of the electronic watch 1, which is the assembly method of the electronic device of this embodiment, the solar panel 16 and the wiring board 161 are aligned with the fixed position of the circuit board 20 and placed on the stepped surface 121 of the housing 12 (P1). Next, by inserting the pad 19 along the inner side of the housing 12, the outer edge of the solar panel 16 is pressed to temporarily fix the solar panel 16 (P2).

[0044] Then, the partition plate 15 is embedded and fixed to the inner surface of the liner 19 (P3). Subsequently, the windshield 17 is embedded and fixed to the housing 12 (P4). Through these processes from P1 to P4, the outer components of the electronic watch 1 are obtained.

[0045] After the solar panel 16 and windshield 17 are fixed in place, the internal structures of the dial 13, pointer 14, and circuit board 20 are inserted into the external components (housing 12) for configuration and connection (P5). The electrodes at the front end of the wiring board 161 are fixed to the circuit board 20 by screws or the like (P6). Then, after fixing other parts as needed and installing the battery, the back cover 18 is fixed to the housing 12 by screws, and the interior of the housing 12 is sealed (P7).

[0046] Furthermore, the assembly of external components P1 to P4 and the internal assembly of components P5 to P7 can be performed separately in other manufacturing processes or manufacturing sites. Alternatively, internal components can be inserted before the assembly of external components.

[0047] In this way, the solar panel 16 is temporarily fixed by the pad 19 on one side and positioned on the stepped surface 121 on the other, making it easy to stably fix the solar panel 16 in the proper position. In addition, even if a misalignment occurs and it needs to be reset, it is easy to reset since it is not fixed by adhesive parts.

[0048] As described above, the electronic watch 1 of this embodiment includes: a cylindrical housing 12 with an opening at least at the upper end; a dial 13 and a pointer 14 serving as a display unit, which are located inside the housing 12 and exposed at the upper end; a light-transmitting partition 15 that runs along the inner circumferential surface of the housing 12 and has an annular shape; an annular solar panel 16 located below the partition 15; and an annular gasket 19 that fixes the outer edge of the solar panel 16.

[0049] In this way, by positioning the solar panel 16 below the light-transmitting partition 15, the solar panel 16 can generate electricity stably without being affected by the display screen. Furthermore, the dial 13 is not limited to a component that allows light to pass through for the solar panel 16, reducing design constraints and enabling more diverse electronic device designs. Additionally, even if the annular solar panel 16 is offset in the circumferential direction, it can still be inserted into the housing 12. However, if there is a positional offset, it may ultimately fail to connect due to misalignment with other components, or other components may be unable to enter. The electronic watch 1 can be assembled while temporarily fixing the solar panel 16 using the pad 19, thereby suppressing such positional offset. Furthermore, in the electronic watch 1, since the solar panel 16 is not fixed using adhesive components, reassembly becomes easy even if the aforementioned positional offset occurs. Moreover, the impact of heating of the thermosetting adhesives, which are frequently used, on internal components is not considered; in the electronic watch 1, the selection of components, thermal design, and temperature control processes during manufacturing and assembly are simplified.

[0050] Additionally, the partition plate 15 is embedded in the housing 12 via the gasket 19. The housing 12 has an annular stepped surface 121, with an inner diameter larger on the upper side than on the lower side of the stepped surface 121, and the outer edge of the solar panel 16 is fixed to the stepped surface 121 via the gasket 19.

[0051] In this way, since the solar panel 16 is fixed between the pad 19 and the step surface 121, it is easy to fix the solar panel 16 of the electronic watch 1. In addition, since the partition plate 15 is also fixed by using the pad 19 to fix the solar panel 16, the solar panel 16 and the partition plate 15 can be fixed stably with appropriate orientation without taking up too much space.

[0052] Furthermore, the solar panel 16 is separated from the separator 15. By sandwiching a pad 19 between the solar panel 16 and the separator 15, the solar panel 16 is separated from the light-transmitting separator 15, thereby preventing the formation of moiré patterns or the like caused by these contacts. Therefore, the electronic watch 1 can suppress the reduction of aesthetics.

[0053] Furthermore, the electronic watch 1 includes a wiring board 161, one end of which is connected to a solar panel 16 and transmits the generated power from the solar panel 16. At least the connection points in the solar panel 16 to the wiring board 161 are covered with a film. Since the solar panel 16 beneath the transparent partition 15 can be visually observed, the design of the electronic watch 1 can be improved by appropriately providing a film in a way that makes the connecting parts, connection marks, and cutouts 16a involved in the connection inconspicuous.

[0054] In addition, the solar panel 16 has a cutout portion 16a on its inner periphery, and the wiring board 161 is integrated with the solar panel 16 and extends from the cutout portion 16a.

[0055] By branching the wiring board 161 from the solar panel 16 near the outer periphery of the electronic watch 1, the wiring board 161 will not protrude into the inner side of the housing 12 even if it is bent within a certain radius of curvature without a steep angle. Therefore, in this electronic watch 1, the wiring board 161 will not compress the space of the internal drive unit, circuit board, etc. Moreover, by not bending the wiring board 161 at a steep angle, the electronic watch 1 can suppress wire breakage caused by signal line deterioration at the bending portion.

[0056] Alternatively, the solar panel 16 may have a coating 162 on a portion of its upper surface, reducing visual visibility from top to bottom. Since the partition 15 is translucent, the solar panel 16 below it can also be visually inspected. Therefore, by using the coating 162 within a range where a reduction in power generation efficiency is not a problem, the design of the electronic watch 1 can be improved. Furthermore, if the mounting points (connection locations) of the wiring board 161 connected to the solar panel 16 can also be visually inspected, the aesthetics are poor. Therefore, by making such parts difficult to visually inspect properly, the reduction in aesthetics can be suppressed.

[0057] Alternatively, the solar panel 16 may also include multiple solar cell units 160. The coating 162 is located at the boundary of the multiple solar cell units 160 when viewed from above on the solar panel 16.

[0058] Since no power generation occurs at the boundary of the solar cell 160, by overlapping this portion with the coating 162, the reduction in power generation efficiency can be further suppressed, and the design of the electronic watch 1 can be improved.

[0059] Alternatively, the separator 15 may have a coating 151 on its lower surface that reduces the visibility of a portion of the solar panel 16 when viewed from above. That is, even if the separator 15 has a coating 151 instead of the solar cell 160, the design of the electronic watch 1 can be similarly improved. Furthermore, in this case, the portion of the cutout 16a where the coating 162 cannot be provided on the solar cell 160 can also have its visual visibility reduced by the coating 151, thus appropriately suppressing any deterioration in appearance.

[0060] In addition, the electronic watch 1 includes a dial 13, a pointer 14 that is rotatable on the dial 13, and a circuit board 20. The circuit board 20 has a timing unit that counts the current time and a display control unit that displays the current time via the pointer 14, and is operated by a control unit.

[0061] Thus, in the electronic watch 1, which has high requirements for portability and battery life, by placing the solar panel 16 below the divider 15 and removing it from below the dial 13, a more stable and continuous power supply can be achieved, and its design can be improved.

[0062] In addition, in the assembly method of the electronic watch 1 in this embodiment, the display part (dial 13 and pointer 14) is housed inside the cylindrical housing 12 with at least an upper opening, with the upper end exposed. An annular solar panel 16 is placed on the annular stepped surface 121 of the housing 12, which is higher than the annular stepped surface 121 and has an inner diameter larger than the lower side. The solar panel 16 is fixed to the stepped surface 121 by pressing the outer edge of the upper surface side of the solar panel 16 with an annular pad 19. An annular light-transmitting partition plate 15 is fixed along the upper end of the inner circumferential surface of the housing 12 through the pad 19.

[0063] In this way, since the spacer plate 15 is embedded while the solar panel 16 is fixed with the spacer plate 19, the spacer plate 15 and the like can be fixed while ensuring that the position of the solar panel 16, especially its rotational direction, is aligned with the connection position with the circuit board 20. Therefore, according to this assembly method, the need for re-fixing due to positional misalignment can be reduced, and the number of manufacturing steps and time can be reduced. Furthermore, even in the event of misalignment, unlike adhesive parts, the spacer plate 19 can be disassembled and readjusted, thus reducing manufacturing defects and lowering costs.

[0064] Furthermore, this disclosure is not limited to the above-described embodiments and various modifications are possible.

[0065] For example, in the above embodiment, the case where a flexible wiring board 161 is connected to or integrally formed on the solar panel 16 has been described, but it is not limited thereto. A wiring component, such as a helical spring, can also be used to connect the electrode terminals of the solar panel 16 and the electrode terminals of the circuit board 20 in a straight line. In this case, the electrode terminals of the circuit board 20 are located on the upper surface side of the circuit board 20.

[0066] Furthermore, the shape of the inner circumference of the shell and the various annular structures do not need to be circular. For example, they can also be elliptical, square, or have rounded corners, etc.

[0067] Furthermore, in the above embodiment, the solar panel 16 and the separator 15 are separated by clamping the pad 19 between a portion of the solar panel 16, but this is not a limitation. Other components may be inserted between them, and the shape of the inner surface of the housing 12 may be determined in such a way that separation is possible even without clamping components. Alternatively, the solar panel 16 and the separator 15 may not be completely separated.

[0068] Alternatively, if the wiring board 161 and the solar panel 16 are not integrated, the cutout portion 16a may be omitted.

[0069] Alternatively, the stepped surface 121 can also be the upper surface of a partial protrusion on the inner side. Furthermore, in this case, the protrusion and the stepped surface 121 may not be completely annular, but rather have partially interrupted sections. In this case, processing can be performed so that the interior cannot be visually inspected beyond what is necessary through the translucent partition 15.

[0070] Furthermore, while the above embodiment describes an analog electronic watch with pointers, it is not limited to this. It could also be an electronic device equipped with a digital display unit such as an LCD screen. Additionally, the electronic device may not be an electronic watch whose primary function is to display the current time.

[0071] While the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the appended claims should be given the broadest interpretation to cover all such modifications and equivalent structures and functions.

[0072] This application claims the benefit of Japanese Patent Application No. 2021-207870, filed on December 22, 2021, the entire contents of which are incorporated herein by reference.

Claims

1. An electronic device, characterized in that, have: A cylindrical shell, with at least an opening at the top; The display unit is located inside the housing and protrudes from the upper end side; A light-transmitting partition component, which runs along the inner circumferential surface of the housing and has an annular shape; A ring-shaped solar cell is located below the separating member; and A ring-shaped elastic component secures the outer edge of the solar cell. The elastic member is configured in such a way that the separating member does not directly contact the housing. A portion of the elastic member separates the separator from the solar cell by being sandwiched between the separator and the solar cell.

2. The electronic device according to claim 1, characterized in that, The separating component is embedded in the housing via the elastic component. The shell has an annular stepped surface with a widening inner circumferential surface. The solar cell has its outer edge fixed to the step surface by the elastic member.

3. The electronic device according to claim 1 or 2, characterized in that, It also includes a wiring section, one end of which is connected to the solar cell and transmits the generated power from the solar cell. The solar cell has a coating at least at the connection point with the wiring section.

4. The electronic device according to claim 3, characterized in that, The solar cell has a cutout on its inner circumferential side. The wiring section is integrated with the solar cell and extends from the cutout section.

5. The electronic device according to claim 1, characterized in that, The solar cell has a coating on the upper surface of a portion of the solar cell that reduces visibility from top to bottom.

6. The electronic device according to claim 5, characterized in that, The solar cell comprises multiple individual solar cell units. The coating film is located at a position overlapping the boundary of the plurality of individual solar cell units when viewed from above.

7. The electronic device according to claim 1, characterized in that, The separator has a coating on its lower surface that reduces the visibility of a portion of the solar cell from above.

8. The electronic device according to claim 1, characterized in that, It also has: The timing unit counts the current time; and The display control unit displays the current time via the display unit.

9. A method for assembling an electronic device, characterized in that, Includes the following steps: Inside a cylindrical shell that is at least open at the top, a ring-shaped solar cell is fixed along the inner circumferential surface of the shell by a ring-shaped elastic member. An annular, light-transmitting dividing member is embedded and fixed above the solar cell along the inner surface of the elastic member. The display unit is housed inside the housing in a manner that exposes it on the upper side.

10. The assembly method of the electronic device according to claim 9, characterized in that, The shell has an annular stepped surface with a widening inner circumferential surface. Fixing the solar cell includes the following steps: placing the solar cell on the stepped surface.

11. The assembly method of the electronic device according to claim 10, characterized in that, Fixing the solar cell includes the following steps: temporarily fixing the solar cell by inserting the elastic member along the inner side of the housing, thereby pressing the outer edge of the solar cell.

12. The assembly method of the electronic device according to claim 11, characterized in that, Fix the solar cell The procedure includes the following steps: fixing the outer edge of the solar cell to the step surface using the elastic component.

13. The assembly method of the electronic device according to claim 9, characterized in that, Fixing the separator includes the following steps: embedding and fixing the separator to the inner surface of the elastic member.

14. The assembly method of the electronic device according to claim 13, characterized in that, Fix the partition component The method includes the following steps: fixing the solar cell in a state where it is separated from the separator by placing the elastic member between the solar cell and the separator member.

15. The method for assembling an electronic device according to any one of claims 9 to 14, characterized in that, The display includes at least a dial and hands.

16. The method for assembling an electronic device according to any one of claims 9 to 14, characterized in that, The process of storing the display unit includes the following steps: storing the display unit in a manner that places it inside the inner edge of the separating member.

17. The method for assembling an electronic device according to any one of claims 9 to 14, characterized in that, The display section includes at least a dial and hands. The process of storing the display unit includes the following steps: storing it such that at least the dial and the pointer are positioned inside the inner edge of the separating member.

18. The assembly method of the electronic device according to claim 9, characterized in that, The solar cell comprises multiple solar cell units and has a coating on the upper surface of a portion of the solar cell that reduces visibility from top to bottom. The coating film is located at a position overlapping the boundary of the plurality of individual solar cell units when viewed from above.

19. The assembly method of the electronic device according to claim 9, characterized in that, The separator has a coating on its lower surface that reduces the visibility of a portion of the solar cell from above. Fixing the separator includes the following steps: aligning the direction of the separator with the direction that reduces the visibility of a specified portion of the solar cell.

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