JP6999454B2 - Electronic clock with solar cell - Google Patents

Description

The present application relates to an electronic clock with a solar cell.

Various structures for positioning the dial of a timepiece are known (see, for example, Patent Document 1-2). Patent Document 1 discloses a timepiece including a dial and a movement. In Patent Document 1, the dial has a dial and a movement with high accuracy by engaging a protrusion provided on one of the dial and the movement with a groove provided on the other of the dial and the movement. Since the position is determined and the center of the movement and the dial coincide with each other, the position of the pointer driven by the movement and the hour letters provided on the dial are highly accurate.

Patent Document 2 discloses an electronic clock with a solar cell including a dial and a movement having a main plate, and in order to irradiate the solar cell with light, the dial is a light-transmitting or semi-transmissive plastic. A dial is used, which is positioned by engaging with protrusions on a ring-shaped frame that secures the solar cell and movement.

Jitsukaisho 64-30482 Gazette Japanese Unexamined Patent Publication No. 2011-149880

However, in order to engage the protrusion provided on one of the dial and the movement as in Patent Document 1 and the groove provided on the other of the dial and the movement, the solar cell is placed inside the protrusion. Since it must be placed, the power generation capacity of the solar cell is reduced.

Further, in an electronic watch with a solar cell as in Patent Document 2, the solar cell and the movement are fixed, and the fixed portion arranged on the outer periphery needs to be provided with a protrusion for determining the position of the dial, so that the width in the radial direction is large. Since it is thick and needs to be hidden from the viewpoint of ornaments, the diameter of the display surface for displaying the dial, hands, etc. of the clock (hereinafter referred to as the parting diameter) becomes small.

Furthermore, since the dial is positioned on the movement by engaging with the protrusions provided on the ring-shaped frame that fixes the solar cell and the movement, a gap is created between the movement and the ring-shaped frame. Due to the shape error, the center of the movement and the dial do not match, so the position accuracy of the pointer and the hour letter is low.

Further, in the case of an electronic watch with a solar cell as in Patent Document 2, when the dial is positioned on the outer peripheral portion, the notch for positioning the dial must be hidden by a case, which becomes a thick edge for the positioning boss. It ends up. Furthermore, since the color of the dial changes when the solar cell and the dial come into contact with each other, the dial is placed on an annular frame to secure a gap between the dial and the dial. Due to the poor position accuracy of the movement, it had a thick edge. Even if the positional accuracy of the dial and the movement is improved, it is difficult to make a fine edge due to the strength of the positioning boss of the dial, so there is a problem that the watch size becomes large.

An object of the present invention is to provide an electronic clock with a solar cell which improves the positioning accuracy of a dial, has a large display area, has high position accuracy of a pointer and a cut, and has a high power generation capacity.

One aspect of the present disclosure is a movement comprising a dial having a light transmissive or semi-transmissive member and a solar cell arranged to face the back surface of the dial, a dial and a solar cell. A positioning structure for positioning the dial and the movement, which has a protrusion protruding from one of the dial and the movement, and a recess or a hole provided on the other of the dial and the movement to receive the protrusion. The solar cell is an electronic clock with a solar cell having a hole through which a protrusion penetrates, and a light-impermeable blindfold member arranged at a position corresponding to the positioning structure of the dial.

According to the present invention, the protrusion provided on one of the dial and the movement penetrates the solar cell and is housed in the recess or the hole provided on the other side of the dial and the movement, so that the solar cell is not miniaturized. Therefore, the dial and the movement having the solar cell are directly positioned without deteriorating the power generation capacity, so that the center of the movement and the dial are aligned, and the position accuracy of the pointer and the cut is high. Since the protrusions that determine the positions of the movement and the dial do not need to be hidden by a light-impermeable blindfold member, a fixing portion is not required, and an electronic watch with a solar cell having a large parting diameter can be provided.

It is a top view which shows the electronic clock with a solar cell. It is sectional drawing which shows the electronic timepiece with a solar cell of FIG. It is an enlarged sectional view which shows the detail of the part X of FIG. It is a top view which shows the dial. It is a perspective plan view which shows the solar cell arranged on the back side of a dial together with a dial. It is a top view which shows the movement. It is an enlarged sectional view which shows the blindfold member which concerns on other forms. It is an enlarged sectional view which shows the blindfold member which concerns on still another form. It is an enlarged sectional view which shows the positioning structure which concerns on other forms. It is an enlarged sectional view which shows the positioning structure which concerns on still another form. It is a top view which shows the movement of the electronic timepiece with a solar cell which concerns on other forms. 11 is an enlarged cross-sectional view showing a blindfold member used in the electronic clock with a solar cell of FIG. 11. It is an enlarged sectional view which shows the blindfold member which concerns on other forms.

Hereinafter, the electronic clock with a solar cell according to the embodiment will be described with reference to the attached drawings. Similar or corresponding elements are designated by the same reference numerals, and duplicate description is omitted. The scale of the figure is subject to change for ease of understanding.

FIG. 1 is a plan view showing an electronic clock with a solar cell. The electronic clock 100 with a solar cell according to the present disclosure uses the generated power obtained by the solar cell (solar cell) as a drive source. The electronic clock 100 with a solar cell is a wristwatch that displays the time with pointers (hour hand H1, minute hand H2, and second hand H3).

FIG. 2 is a cross-sectional view showing the electronic clock with a solar cell of FIG. The electronic clock 100 with a solar cell includes a dial 1, a movement 2, a case 3, a bezel 4, a windshield 5, and a back cover 6.

For convenience of explanation, in the dial 1, the surface showing the time together with the pointer (upper surface in FIG. 2) is referred to as the front surface 11, the surface opposite to the surface 11 is referred to as the back surface 12, and the hour hand H1 displaying the time information on the surface 11 is referred to. , The minute hand H2 and the second hand H3 are provided, and the dial 1 is arranged between the bezel 4 into which the windshield 5 is fitted and the movement 2 inserted into the case 3, and the bezel 4 and the back cover 6 are fitted into the case 3. By inserting it, the positions of the dial 1 and the movement 2 in the vertical direction are fixed. The exterior structure and the method of holding the movement are examples.

Further, the parting portion 41 of the bezel 4 covers the peripheral edge portion of the dial 1, and the area diameter Z in which the dial 1 can be visually recognized through the windshield 5 is referred to as a parting diameter.

FIG. 4 is a plan view showing a dial. The dial 1 of the present disclosure is a circular flat plate, but may have other shapes such as an ellipse or a polygon. The dial 1 has a light-transmitting or semi-transparent member 13 because the solar cell 21 (described later) generates electricity with the light received by the surface 11. The terms "light transmissivity" and "light semitransparency" in the present disclosure mean that light having a wavelength required for power generation of the solar cell 21 can be transmitted, and the member 13 is, for example, a polycarbonate resin or an acrylic resin. It includes a resin material such as, a glass material, and a metal plate having a plurality of holes. The dial 1 has a plurality of hour letters M on the surface 11. With reference to FIG. 2, the hour letter M is, for example, a member having a foot L inserted into a hole provided in the dial 1. The hour letter M is light opaque. The term "light impermeable" in the present disclosure means that visible light cannot be transmitted, and may include various materials such as a resin material or a metal material. Further, the hour letter M may be printed on the surface 11.

FIG. 3 is an enlarged cross-sectional view showing the details of the X portion of FIG. The movement 2 has a solar cell 21, a solar cell receiving plate 22, a main plate 23, and a magnetically resistant plate 24, and has various other components (for example, a motor and a clock circuit board, etc.) and is magnetically resistant. The main plate 23, the solar cell receiving plate 22, and the solar cell 21 are arranged in this order on the plate 24.

Further, the solar cell 21 of the present disclosure is made of a thin material such as a film, and the solar cell 21 is attached to a solar cell receiving plate 22 made of a metal having a shape such as a hook to attach the solar cell 21 to a cross section of the movement. Hold in the direction.

The magnetically resistant plate 24 has magnetic permeability in order to reduce that the motor that drives the hour hand H1, the minute hand H2, and the second hand H3 cannot be driven due to the influence of an external magnetic field.

The solar cell 21 faces the back surface 12 of the dial 1. A spacer S is arranged between the solar cell 21 and the back surface 12 of the dial 1, the solar cell 21 comes into contact with the dial 1, and the solar cell 21 is reflected on the dial 1 to give the dial 1 an aesthetic appearance. In order to prevent damage, a gap G is provided between the dial 1 and the solar cell 21. The spacer S is made of various materials (for example, a metal material or a resin material) and is fixed to the solar cell 21.

As a fixing method, for example, the spacer S may be attached by adhesive or the like, or may be formed by printing or the like.

Further, in the present disclosure, the spacer S is fixed to the solar cell 21, but may be fixed to the dial. In this case, the spacer S may be formed on the solar cell 21 or the dial 1 by molding.

Further, a positioning structure 7 for positioning the dial 1 and the solar cell 21 is provided. The positioning structure 7 is arranged inside the parting portion 41 when viewed in the normal direction of the dial 1, and has a riser 71 protruding from the movement 2 and a hole 72 provided in the dial 1. .. Although the description is made using two or more positioning structures 7 in the present disclosure, the positioning structure 7 is not limited to two or more, and one positioning structure 7 may be used. Specifically, a combination of one positioning structure 7 and another positioning structure may be used, and the shape of the protrusion 71 is generally cylindrical in the present disclosure, but another shape such as a prismatic shape is used to form a dial with one positioning structure 7. 1. The solar cell 21 may be positioned.

The protrusion 71 penetrates the hole 25 provided in the movement (the hole 25a provided in the solar cell 21, the hole 25b provided in the solar cell receiving plate 22, the hole 25c provided in the main plate 23, and the hole 25d provided in the magnetic resistant plate 24). And fixed. The hole 25c is fixed to the protrusion 71 by press-fitting. Further, the flange 73 provided on the protrusion 71 is provided to improve the inclination accuracy of the protrusion 71 with respect to the movement 2 and prevent the protrusion 71 from falling off from the movement 2, and is provided with a step portion 26 that engages with the main plate 23. The flange 73 may not be provided.

The protrusion 71 protrudes from the surface of the solar cell 21 and is made of a metal such as brass or iron in the present disclosure. However, when the hole 25c and the hole 25d are abolished and the main plate 23 is molded, the protrusion 71 is provided. Is also good.

The hole 72 provided in the dial 1 is configured to removably accept the protrusion 71, penetrates the dial 1, and the protrusion 71 engages with the hole 72 to cause the movement 2 and the dial 1 to move together. It is fixed in the radial direction.

Further, although the positioning structure 7 has a hole 72 penetrating the dial 1, the positioning structure 7 may have a recess provided on the back surface 12 of the dial 1 instead of the hole 72. Even in this case, the recess can be configured to removably accept the protrusion 71.

FIG. 5 is a perspective plan view showing the solar cells arranged on the back surface side of the dial 1 together with the dial, and FIG. 6 is a plan view showing the movement. With reference to FIGS. 5 and 6, the solar cell 21 has a shape corresponding to the dial 1 (in this embodiment, a circular flat plate), and a plurality of power generation regions 21a to 21e separated from each other by the dividing line D. By connecting in series, it is possible to output the voltage required for an electronic clock with a solar cell. Each of the power generation regions 21a to 21e can have various shapes, and as shown in FIGS. 5 and 6, has a fan shape evenly divided in the circumferential direction. In the solar cell 21, the central region C, the peripheral portion E, and the dividing line D are non-power generation regions, and each power generation region 21a to 21e is surrounded by the non-power generation region.

The spacer S is arranged on the peripheral edge E of the solar cell 21, covers at least a part of the non-power generation region, secures the radial width of the spacer S, and irradiates the power generation region of the solar cell 21 with light. Is mitigating the decrease in. Further, the spacer S has a substantially annular shape, and has a notch N in order to facilitate disassembly of the dial 1 and the solar cell 21.

As shown in FIGS. 5 and 6, in the present disclosure, the two protrusions 71 and the holes 72 are arranged so as to be 180 ° apart from each other in the circumferential direction. With such a configuration, the distance between the two protrusions 71 becomes longer, and the positioning accuracy between the dial 1 and the solar cell 21 and the movement 2 is improved.

With reference to FIG. 6, in the present disclosure, the hole 25a (the hole 25a on the left side in FIG. 6) is formed on the dividing line D between the adjacent power generation regions 21d and 21e in the solar cell 21. The protrusion (first protrusion) 71 is arranged on the dividing line D. The non-power generation area surrounds the hole 25a, and in this part, the non-power generation area is wider than the dividing line D.

Further, the other hole 25a (hole 25a on the right side in FIG. 6) is formed in one power generation region 21b in the solar cell 21, and therefore, a non-power generation region in the power generation region 21b is formed around the hole 25. It is formed.

With reference to FIG. 5, the dial 1 is located on the surface 11 at a position corresponding to a protrusion 71 (a position corresponding to a positioning structure 7) when viewed in the normal direction of the dial 1. have. As described above, since the hour letter M is light opaque, the hour letter M prevents the positioning structure 7 from being visually recognized through the dial 1 so that the non-power generation region is not reflected on the dial 1. It prevents the appearance from being spoiled. Further, it is preferable that the hour letter M is formed larger than the non-power generation region around the hole 25.

With reference to FIG. 3, the hour letter M has two legs L, and the hour letter M is positioned by engaging with a hole provided in the dial 1. Further, the hour letter M covers the positioning structure 7 between the two legs L as a blindfold member of the positioning structure 7. However, the blindfold member can be in various forms.

7 and 8 are enlarged cross-sectional views showing a blindfold member according to another form. In FIGS. 7 and 8, the right side is the center side of the dial 1. In FIG. 7, since the positioning structure 7 is arranged closer to the peripheral edge of the dial 1 than the two legs L of the hour letter M, the distance between the two positioning structures 7 is longer than that of FIG. The positioning accuracy of the dial 1, the solar cell 21, and the movement 2 can be further improved.

In contrast, in FIG. 8, the positioning structure 7 is located closer to the center of the dial 1 than the two legs L of the hour letter M, and the middle frame 8 has, for example, an annular shape surrounding the movement 2. Have. Therefore, the hour letter M is arranged closer to the peripheral edge portion of the dial 1 as compared with FIG. In this case, since the hour letter M is arranged closer to the peripheral edge of the dial 1, the movement 2 of the same size is used only by increasing the diameter of the solar cell 21, the solar cell receiving plate 22, and the spacer SP. The dial 1 can be made relatively large while using the middle frame 8 together with this. That is, by changing the hour letter M, the dial 1, the solar cell 21, and the solar cell receiving plate 22, it is possible to provide electronic clocks with solar cells having different sizes.

Further, referring to FIG. 3, in the positioning structure 7, the protrusion 71 protrudes from the movement 2, and the hole 72 is provided in the dial 1, but the positioning structure may be in another form. good.

9 and 10 are enlarged cross-sectional views showing a positioning structure according to another embodiment. With reference to FIGS. 9 and 10, in the positioning structure 9, the protrusion 91 protrudes from the dial 1, and the hole 92 is provided in the movement 2. Specifically, in FIG. 9, the protrusion 91 protrudes from the hour letter M provided on the dial 1, penetrates the hole provided in the dial 1, and protrudes from the back surface 12 toward the movement 2. There is. The hole 92 penetrates the solar cell 21, the solar cell receiving plate 22, and the main plate 23. The hole 92 has a shape corresponding to the protrusion 91, and the movement 2 and the dial 1 are fixed in the radial direction by engaging the protrusion 91 with the hole 92.

In FIG. 10, the protrusion 91 is integrally formed with the back surface 12 of the dial 1, and protrudes from the back surface 12 toward the movement 2. Similar to FIG. 9, the hole 92 penetrates the solar cell 21, the solar cell receiving plate 22, the main plate 23, and the magnetic resistant plate 24, and has a shape corresponding to the protrusion 91.

In the electronic watch 100 with a solar cell according to the present disclosure as described above, the protrusions 71 and 91 provided on one of the dial 1 and the movement 2 and the holes 72 and 92 provided on the other of the dial 1 and the movement 2 are provided. Alternatively, the recesses allow the dial 1 and the movement 2 having the solar cell 21 to be directly positioned. For example, when the ring-shaped frame is provided with protrusions, recesses, or holes as in Patent Document 2, the dial and the movement are positioned via the ring-shaped frame, so that the ring-shaped frame is positioned. The positioning accuracy between the dial and the solar cell may decrease due to the gap between the body and the movement. Therefore, in the electronic clock 100 with a solar cell, the dial 1 and the solar cell 21 are positioned with higher accuracy than in the case where a ring-shaped frame is interposed. Further, in the electronic clock 100 with a solar cell, the hour letter M, which is a blindfold member, prevents the positioning structure 7 from being visually recognized from the surface 11 of the dial 1. Therefore, the positioning accuracy between the dial 1 and the solar cell 21 can be improved without deterioration of the design.

Further, in the electronic clock 100 with a solar cell, the spacer S covers at least a part of the non-power generation region located at the peripheral portion E of the solar cell 21. In this case, the non-power generation area is effectively used.

Further, the protrusions 71 and 91 and the holes 72 and 92 improve the positioning accuracy of the dial 1, the solar cell 21, and the movement 2. Further, since the positional accuracy of the outer peripheral portion between the spacer S and the dial 1 is also improved, the spacer S does not come off from the overlap of the outer peripheral portion of the dial 1 even if the width in the radial direction of the spacer S is narrowed, and the spacer S is used. The gap G provided by is not affected.

Further, in the electronic clock 100 with a solar cell, the solar cell 21 has a plurality of power generation regions 21a to 21e separated from each other by a dividing line D, and the first protrusion 71 of at least two protrusions 71 is provided. , Arranged on the dividing line D. Therefore, the reduction of the power generation area can be minimized. Further, since the first protrusion 71 is arranged on the dividing line D, the blindfold member (in the present embodiment, the hour letter M) is also located on the dividing line D, and therefore, at least the dividing line D. The aesthetic appearance of the dial 1 is improved by partially hiding it with the hour letter M.

Further, in order to secure the gap G between the dial 1 and the solar cell 21 without impairing the power generation capacity of the solar cell 21, the radial width of the spacer S is the radial width of the peripheral edge portion E of the solar cell 21. Most preferably, it matches the width.

Further, in the electronic clock 100 with a solar cell, the second protrusion 71b of the protrusions 71 is surrounded by one power generation region 21b. Depending on the number of divisions and the division position of the power generation area, the protrusion 71b cannot be arranged on the division line D, but the blindfold member (in the present embodiment, the hour letter M) causes the second protrusion 71b (and the corresponding hole 72) to be formed. Hidden and aesthetically pleasing.

Further, since the blindfold member has the hour letter M, it is not necessary to add a new part as the blindfold member. In the present disclosure, all of the blindfold members are hour letters M, but a part of the blindfold members may be an element other than the hour letters M (for example, a member showing a pattern or a mark, printing, etc.). ..

Further, in the electronic clock 100 with a solar cell, the protrusion 91 may protrude from the hour letter M (see FIG. 9). The hour letter M may be provided with a foot L. Therefore, in this case, the protrusion 71 can be easily formed in the same manner as the foot L.

Further, in the electronic timepiece 100 with a solar cell, the positioning structure 7 is arranged inside the parting portion 41 when viewed in the normal direction of the dial 1, so that the dial and the movement can be positioned. Compared with the case where the notch is provided on the peripheral edge of the dial, the width of the parting portion 41 is reduced, and the degree of freedom in designing the timepiece is improved.

Next, another form of the electronic clock with a solar cell will be described.

FIG. 11 is a plan view showing the movement of the electronic clock with a solar cell according to another embodiment. The electronic clock 200 with a solar cell has two additional protrusions 71c arranged on the dividing line D, and is formed in the power generation region 21b of the solar cell 21 of the electronic clock 100 with a solar cell shown in FIG. The protrusion (second protrusion) 71b has been abolished. That is, the electronic clock 200 with a solar cell differs from the electronic clock 100 with a solar cell in that it has a total of three protrusions 71. Due to the positional relationship between the hour letter M and the power generation areas 21a to 21e, the hour letter M is not located on the two added protrusions 71c (the two protrusions on the right side in FIG. 11). Therefore, in the electronic clock 200 with a solar cell, the two additional protrusions 71c (positioning structure 7) are hidden by the blindfold member which is an element other than the hour letter M.

The electronic clock 200 with a solar cell is located between the power generation regions 21d and 21e in place of the protrusion (second protrusion) 71 formed in the power generation region 21b of the electronic clock 100 with a solar cell by the two added protrusions 71. By aligning with the protrusion 71 on the dividing line D (the protrusion 71 on the left side in FIG. 11), the positioning accuracy of the dial 1, the solar cell 21, and the movement 2 can be achieved in the same manner as the electronic watch 100 with a solar cell. Can be done.

FIG. 12 is an enlarged cross-sectional view showing a blindfold member used in the electronic clock with a solar cell of FIG. As shown in FIG. 12, the positioning structure 7 not located below the hour letter M is hidden by the print P. The print P, which is a blindfold member, is provided on the surface 11 of the dial 1 and shows a pattern, a mark, or the like. Further, in the positioning structure 7 located below the print P, a recess 74 is provided on the back surface 12 of the dial 1 instead of a hole penetrating the dial 1, and the recess 74 receives the protrusion 71c.

FIG. 13 is an enlarged cross-sectional view showing a blindfold member according to another form. As shown in FIG. 13, the dial 1 may have two members 13, 14. The member 14 has a print P similar to the print P in FIG. 12 at a position corresponding to the positioning structure 7 which is not located below the hour letter M. Further, the member 13 has a hole 72 penetrating the member 13, and the member 14 does not have such a hole. Therefore, the hole 72 can be seen as a recess in the entire dial 1. In FIG. 13, since the hole 72 is deeper than the recess 74 in FIG. 12, the engagement distance between the protrusion 71c and the hole 72 is longer. Therefore, the protrusion 71c and the hole 72 are more securely engaged.

The electronic clock 200 with a solar cell as shown in FIGS. 12 and 13 can have substantially the same effect as the electronic clock 100 with a solar cell described above. In particular, in the electronic clock 200 with a solar cell, a part of the blindfold member is printed P painted on the dial. Even in this case, the positioning structure 7 is hidden by the print P. Therefore, the aesthetics are not spoiled.

Although the embodiment of the electronic clock with a solar cell has been described, the present invention is not limited to the above embodiment. Those skilled in the art can make various modifications to the above embodiments.

Further, those skilled in the art can incorporate the features contained in one embodiment into other embodiments or exchange them with the features contained in other embodiments as long as there is no contradiction.

1 ... Dial, 2 ... Movement, 7, 9 ... Positioning structure, 11 ... Dial surface, 12 ... Dial back surface, 13, 14 ... Members, 21.・ ・ Solar cell, 21a-21e ・ ・ ・ Power generation area, 71,91 ・ ・ ・ Protrusion, 72,92 ・ ・ ・ Hole, 74 ・ ・ ・ Recess, 100,200 ・ ・ ・ Electronic clock with solar cell, D.・ ・ Dividing line, E ・ ・ ・ peripheral edge of solar cell, G ・ ・ ・ gap, M ・ ・ ・ hour letter, S ・ ・ ・ spacer, P ・ ・ ・ printing.

Claims (10)

A dial having a light-transmitting or semi-transparent member,
With a movement having solar cells arranged to face the back of the dial,
A positioning structure for positioning the dial and the solar cell, which is provided on a protrusion protruding from one of the dial and the movement, and on the other of the dial and the movement. The positioning structure, which has a recess or a hole for receiving the protrusion.
A light-impermeable blindfold member arranged at a position corresponding to the positioning structure of the dial, and
Equipped with
The solar cell has a hole through which the protrusion penetrates .
At least a part of the blindfold member is an hour letter,
An electronic clock with a solar cell that features that. A dial having a light-transmitting or semi-transparent member,
With a movement having solar cells arranged to face the back of the dial,
A positioning structure for positioning the dial and the solar cell, which is provided on a protrusion protruding from one of the dial and the movement, and on the other of the dial and the movement. The positioning structure, which has a recess or a hole for receiving the protrusion.
A light-impermeable blindfold member arranged at a position corresponding to the positioning structure of the dial, and
Equipped with
The solar cell has a hole through which the protrusion penetrates.
At least a part of the blindfold member is a print painted on the dial.
An electronic clock with a solar cell that features that. The electronic clock with a solar cell according to claim 1 or 2 , wherein the positioning structure and the light-impermeable blindfold member have at least two or more. The electronic clock with a solar cell according to any one of claims 1 to 3, further comprising a spacer for providing a gap between the dial and the solar cell. The electronic clock with a solar cell according to claim 4 , wherein the spacer covers at least a part of a non-power generation region located at a peripheral edge of the solar cell. The electronic clock with a solar cell according to claim 4 or 5 , wherein the spacer is fixed to the solar cell. The electronic clock with a solar cell according to claim 4 or 5 , wherein the spacer is fixed to the dial. The solar cell has a plurality of power generation regions separated from each other by a dividing line.
The electronic clock with a solar cell according to any one of claims 1 to 7 , wherein there are a plurality of the protrusions, and at least one of the plurality of protrusions is arranged on the dividing line. The electronic clock with a solar cell according to claim 8 , wherein the plurality of protrusions are present, and at least one of the plurality of protrusions is surrounded by one power generation area. The electronic clock with a solar cell according to claim 1 , wherein the hour letter is provided on the dial, and the protrusion protrudes from the hour letter.

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