JPH0734389U - Solar cell clock - Google Patents

Abstract

(57) [Summary] [Purpose] Use solar cells and eliminate the design restrictions due to the dark purple color of solar cells. [Structure] A solar cell is covered with a translucent dial plate 4, one of which is a translucent thin plate 13 and 14 via a spacer 11 to form a dial plate, and the other is Japanese paper. There are innumerable holes and are fixed to the ring-shaped frame. [Effect] The former is harder to see through than one of the total thickness.
In the latter, the light transmittance of the hole is improved, and it is not so noticeable.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a timepiece structure using a solar cell.

[0002]

[Prior art and its problems]

 The solar cell in the solar cell watch is generally used bare on the dial surface because it absorbs light and generates electricity using single crystal silicon or amorphous silicon.

[0003] However, this is a great design constraint for the appearance of the timepiece because the solar cell has a unique dark purple color.

In order to eliminate this drawback, it has been proposed to cover the solar cell with a light-transmitting colored shielding member at the expense of power generation efficiency. However, if the shielding member is too thin, the color of the underlying solar cell will be transparent, and if it is too thick, the amount of light transmitted will decrease and power generation efficiency will decrease.

[0005]

[The purpose of the device]

 An object of the present invention is to provide a timepiece equipped with a solar cell capable of removing design restrictions and improving translucency of a dial plate to enhance power generation efficiency.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the solar cell timepiece of the invention adopts the following configuration.

The watch with a solar cell of the present invention is a watch in which the solar cell provided on the windshield side of the watch body is covered with a translucent dial, and the dial has two glass plates with a ring-shaped spacer interposed therebetween. It is characterized by being composed of a thin plate made of plastic, ceramic, or jewelry.

The timepiece with a solar cell according to the present invention is a timepiece in which the solar cell provided on the windshield side of the timepiece body is covered with a translucent dial, wherein the dial is a rigid ring-shaped frame with a plurality of dials. It is characterized in that it is configured by adhering a flexible member made of paper or film having the microscopic holes.

[0009]

[Action]

 In recent years, the power generation capacity of solar cells has become more relaxed due to improvements in solar cell performance and lower power consumption of watches. Therefore, the efficiency of the solar cell is sacrificed slightly, and the design constraint, which is now the biggest problem, is removed.

First, the transparent dial plate is divided into two and an air gap is provided between them, so that the stirring effect due to the refraction of light is produced, and the solar cell below does not change the transmittance. You can reduce the amount of see-through.

Secondly, a material having a good light-transmitting property and having a good-looking appearance is added with microscopic holes that do not impair the appearance, thereby further improving the light-transmitting property.

[0012]

【Example】

 An embodiment according to the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of the entire timepiece common to the first and second embodiments to which the present invention is applied.

As shown in FIG. 1, an indicator 2, a dial 4, a solar cell 5, and a timepiece body 6 are inside an outer casing 2 in which a windshield 1 made of a transparent material is formed. Part of the light that passes through the windshield 1 penetrates the dial 4 and reaches the solar cell 5 to generate electricity. The following describes the improvement of the dial under such usage conditions.

FIG. 2 is a sectional view of the dial 4 showing the first embodiment. Two dial feet 12 are integrally formed on a spacer 11 formed of plastic in a ring shape. Two first and second thin plates 13 and 14 made of opalescent white plastic, which are usually made to have a thickness half that of the dial, are attached to each other with the spacer 11 sandwiched therebetween.

Next, the operation will be described. Incident light that has passed through the windshield 1, especially light that is not perpendicular to the dial 4, passes through the first thin plate 13, the air gap 15, and the second thin plate 14 and has a different refractive index. It reaches the solar cell in a state where the direction is changed by the unevenness of the four surfaces of the first thin plate 13 and the second thin plate 14 and the mixture is stirred.

The solar cell 5 absorbs light having a wavelength useful for power generation and then reflects unnecessary light. When the wavelengths aligned to some extent are directly returned to the eyes, the color of the solar cell 5 can be seen through, but the reflected light also passes through the second thin plate 14 below and the first thin plate 13 above the gap 15. When going forward, the same phenomenon as that of the incident light is caused, and the interference with the incident light is also combined to make the color of the solar cell 5 inconspicuous.

FIG. 3 is a partially enlarged sectional view of the dial 4 showing a modification of the first embodiment. In order to stir the light described above, it is effective to roughen the surfaces of the upper and lower first thin plates 23 and 24. Here, the outer surfaces 231 and 241 of the upper and lower first thin plates 23 and 24 are uneven.

Although the embodiment has been described above, as a modification, the upper and lower thin plates may have different thicknesses, materials, colors and the like. In addition, there are some combinations of roughening the surfaces of the first thin plate and the second thin plate, including the case of roughening both surfaces. The spacer 11 may be made of metal such as brass.

4 and 5 are a sectional view and a perspective view, respectively, showing a second embodiment.

The ring-shaped frame 31 made of plastic is provided with two integrally formed dial feet 32. A flexible Japanese paper 36 is attached to the circular recess 38 on the windshield side of the frame 31. Moreover, the Japanese paper 36 is provided with innumerable minute holes 37 opened at the tip of the needle.

Next, the operation will be described. Originally, Japanese paper 36 does not have a poor light-transmitting property, and by adding holes 37 to this, the light transmittance is further increased. Moreover, since it scatters light due to its fibrous nature, it is difficult for the solar cell below to be transparent, and the presence of the holes 37 is not noticeable.

Further, since the washi paper 36 is stretched by the frame 31, there is no problem in handling the frame 36 while holding it. The material used for the tensioning may be other than Japanese paper, or may be a film having high translucency or paper.

[0023]

[Effect of device]

 As described above, according to the present invention, it is possible to combine the use of a solar cell that has good power generation efficiency and generates power even when it is removed from the arm with a dial plate with good light transmittance. Design restrictions can be removed. Moreover, since the structure is simple and it is independent from the watch body, it can be easily used together with other power generators.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a watch with a solar cell according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a dial according to the first embodiment of the present invention.

FIG. 3 is a sectional view showing a dial according to the first embodiment of the present invention.

FIG. 4 is a sectional view showing a dial plate according to a second embodiment of the present invention.

FIG. 5 is a perspective view showing a dial plate according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Windshield 4 Dial 5 Solar Cell 11 Spacer 13 First Thin Plate 14 Second Thin Plate 31 Frame 36 Japanese Paper

Claims (3)

[Scope of utility model registration request] 1. A solar cell provided on the windshield side of a watch body,
A watch with a solar cell, wherein the watch is covered with a transparent dial plate, and the dial plate is composed of two thin plates made of glass, plastic, ceramic, or jewelry with a ring-shaped spacer sandwiched therebetween. 2. The timepiece with a solar cell according to claim 1, wherein the outer surface of the two thin plates is rougher than the inner surface. 3. A solar cell provided on the windshield side of the watch body,
In a watch covered with a translucent dial, the dial is made by attaching a flexible member made of paper or film having a plurality of micro holes to a rigid ring-shaped frame. A featured watch with solar cells.