JPH03141906A - Portable power source also serving as sunshade - Google Patents

Abstract

PURPOSE:To reduce weight and improve durability and safety by using a film- like material on which solar cells are formed as a shading and connecting part or whole of umbrella ribs to lead electrodes of the solar cells. CONSTITUTION:Part of umbrella ribs 106 are connected to a central conductor 103 while the rest of the ribs 107 are connected to an outer conductor 104. The ribs 106, 107 are connected to solar cells arranged on the surface of a shading 101. The power generated with the solar cell is taken out via a coaxial cable-like umbrella shaft 102 from an output terminal 105. In the case a film-like material 201 of light shading property is used as the shading 101 on which the solar cells 204 are directly arranged so as to interrupt light, the shading 101 is stretched with the solar cells 204 on the sunny side. In the case the film- like material 201 is transparent, the solar cell may be on either sunny or back side. A transparent electrode 202, a back side electrode 203, and a surface protection film 205 also serving as a reinforcement are arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a light shielding device that uses a solar cell and also functions as a portable power source.

[Prior art and problems to be solved by the invention] Conventionally,
Umbrellas such as parasols and beach umbrellas have been used as a shade device when the sunlight is so strong that it makes people feel uncomfortable.

However, in addition to simply blocking sunlight, solar cells can be used to convert sunlight energy into electrical energy and serve as a portable power source, allowing it to be used as a power source for various electrical devices. , very convenient.

Japanese Patent Application Laid-Open No. 52-80951 discloses a portable light-shielding blower in which a solar cell is arranged on a light-shielding cloth of a parasol and the blower is driven by the energy of the solar cell.

However, when a solar cell is placed on a light-shielding cloth, the weight of the solar cell is added to the cloth, making it heavy, making it unsuitable for portable use.

Furthermore, when using not only an air blower but also a solar cell attached to a parasol as a portable power source, wiring must be wired inward from the solar radiation surface of the parasol in some way. At this time, if the umbrella was wired with a conductive wire or the like, there was a risk of the wires breaking because the umbrella could be closed or expanded, and there was a problem with durability.

Furthermore, in the case of beach umbrellas and other items that are likely to get wet, there is a risk of short-circuiting with structural members such as the ribs and shafts of umbrellas, in which conductors are often used, such as the connections between conductive wires and solar cells.

Furthermore, the cost of materials for the parasol, the cost of the solar cells, protection materials for the solar cells, wiring materials, etc. are required separately, and the manufacturing cost of the parasol and solar cells is combined with the manufacturing cost of assembly. There was a problem in that this resulted in high costs.

As described above, a practical light shielding device that also functions as a portable power source has not been devised due to insufficient weight, durability, safety, and manufacturing cost.

[Object of the Invention] An object of the present invention is to provide a more practical portable power source/shading device that is lightweight, has high durability, safety, and low manufacturing cost.

[Means and effects for solving the problems] In order to solve the above-mentioned problems, the present invention provides a portable power source/power source characterized in that the power source is a light-shielding member made of a film-like material on which solar cells are formed. A light shielding device is provided.

Further, in an umbrella having a light shielding member formed with a solar cell, a shaft supporting the light shielding member, and an output terminal provided on the shaft or the handle, the electric power generated by the solar cell is
A portable power source and light shielding device characterized in that it is extracted from the output terminal through the shaft of the umbrella, and the bone of the umbrella is used as the extraction electrode of the solar cell, and the skeleton is connected to the umbrella of the coaxial linear structure. The present invention attempts to solve the above problem by providing a portable power source/shading device which is connected to the inner conductor and outer conductor of the shaft and is extracted as a desired electromotive force.

[Function] According to the above-mentioned means of the present invention, firstly, the solar cells are formed directly on the light-shielding cloth instead of pasting the solar cells on the light-shielding cloth, so that the light-shielding cloth can be used as a conventional parasol or It is lightweight enough to be almost as light as a beach umbrella, and since the fabric material and the solar cell forming surface are made of the same material, there is no need to attach them, reducing material and manufacturing costs.

Second, by making the shaft of the umbrella have a coaxial line structure and providing an output terminal in the handle, it was possible to provide a highly durable portable power source and light shielding device with fewer problems such as disconnection.

Thirdly, some or all of the bones of the umbrella are used as electrodes for solar cells, some of the bones are connected to the center conductor (inner conductor) of the umbrella shaft with a coaxial line structure, and some of the bones are By connecting the bone to an external conductor having a coaxial wire structure, a connection can be made without the need for conductive wires, and a highly durable portable power source and light shielding device can be provided.

Fourth, by proactively using the bones and shafts of umbrellas, which are often used as conductors, as electrodes or conductive wires, not only will material costs be reduced, but the bones and shafts can also be used for solar cells. This actually reduces the risk of short circuits compared to when there is electrical insulation.

Furthermore, umbrella bones and solar cells placed between the bones,
By changing the connection method of the coaxial umbrella shaft, the solar cells can be connected in any combination of series connection and parallel connection. Therefore, it is possible to provide a portable power source with desired output voltage and output current. In other words, solar cells formed between bones have the same output voltage,
Even with the output current, by changing the connection between the solar cell, the bone, and the shaft, it was possible to create a 12V power source for a DC12V load, and a 3V portable power source for a DC3V load. .

As described above, by using part or all of the shade cloth, the shaft, handle, or bones of an umbrella as a component of a solar cell, it is lightweight, has excellent durability, and is highly safe. We were able to provide a portable power source and light shielding device that was low in manufacturing cost and suitable for practical use.

[Example] (Example 1) Fig. 1 is a cross-sectional view showing a typical example of the portable power source/shading device of the present invention, in which 101 is a shade cloth on which solar cells are formed; 102 is a coaxial umbrella shaft, 1
03 is the center conductor (inner conductor) of the coaxial line, 104 is the outer conductor of the coaxial line, 105 is the output terminal of the solar cell, 106,1
07 is the umbrella bone. Some umbrella bones 106 are the center conductor 1
03, and some other umbrella ribs 107 are connected to the outer conductor 104. Center conductor 103 of coaxial line
and the outer conductor 104 are insulated. Umbrella bone 106,1
07 is connected to a solar cell formed on the surface of the shade cloth 101, and the power generated by the solar cell is transmitted to the umbrella rib 10.
6 and 107 are used as electrodes, and are taken out from the output terminal 105 through the coaxial umbrella shaft 102.

FIG. 2 is a diagram showing in more detail the structure of the light-shielding cloth 101 and the solar cell shown in FIG. Using. When the film material 201 has a light-shielding property, the light-shielding cloth 101 is stretched so that the formed solar cell 204 faces the solar radiation surface. Also, film-like substance 20
When 1 is translucent, the solar cell forming surface may be on the sunlight side or on the back side, 202 is a transparent electrode, 2.03 is a back electrode, and 205 is a surface protective layer. It is a reinforcing layer.

FIG. 3 is an enlarged view of a part near the shaft of the umbrella. As shown in FIG.
3, some of the umbrella ribs 303 are connected to the central conductor 305 of the umbrella shaft, and some other umbrella bones 304 are connected to the outer conductor 306 of the umbrella shaft.

Figures 4 and 5 show an example of the connection between the umbrella ribs and the shaft, Figure 4 is an example of series connection of solar cells, and Figure 5 is an example of parallel connection of solar cells. In the figure, + and - indicate the polarities of the extraction electrodes of the solar cells formed between the bones, respectively. Note that the shaded area in FIG. 4 has no solar cells formed. If the solar cell between the bones is counted as one, there will be seven series connections as shown in FIG. 4, and eight parallel connections as shown in FIG. 5.

Each component of the above-described portable power source/shading device of the present invention will be described in detail below.

As the light-shielding cloth 101, polyimide, polyester, vinyl, etc. can be used as a film-like material 201 forming a solar cell as shown in FIG. 2 because it is flexible and lightweight. These film-like substances 201
After forming the solar cell 204 on the substrate, a surface protective layer 205 is formed by applying resin, vinyl, or the like. Surface protective layer 205
is also used as a reinforcing material for light-shielding cloth. Further, 202 is a transparent conductive film (transparent electrode), and 203 is a back electrode. When forming a solar cell on a solar radiation surface, 203 becomes a transparent electrode.

As the solar cell 204, a thin film solar cell is preferable as a solar cell formed on the film material 201, and the constituent materials include amorphous silicon, polycrystalline silicon,
Or compounds of amorphous silicon and other elements, or CdS, CdTe, CuxS, CuInS
ez etc. can be used.

The ribs and shaft of the umbrella may be made of commonly used conductive materials such as A1, but in order to avoid short circuits and electric shocks, it is desirable that the surface of the umbrella be coated with an insulating material except for the connecting parts.

The portable power source of the present invention can be used as a DC power source for all kinds of electrical equipment, such as radios, radio cassettes, televisions, videos, video cameras, electric fans, and cooler boxes.

Furthermore, the portable power source of the present invention can be connected to a secondary battery to charge the secondary battery.

In this Example 1, in the parasol-type solar cell paratsuru having the configuration shown in FIG. Then, the extraction electrode 302 is connected to the umbrella bones 303 and 304 in the form shown in FIG.
Electric power was extracted from a pin jack-shaped output terminal 105 through an umbrella shaft 102 connected to the umbrella rib. The bones and shaft of the umbrella are coated with insulating paint.

As the solar cell, a single type amorphous silicon solar cell was used, and six single type amorphous silicon solar cells were formed in series with a length of 300 cm between the bones.

The solar cells formed on the eight surfaces between the bones were connected in parallel on the eight surfaces as shown in FIG. At this time, the output is AMl, 5
It was about DC3V and about 14W.

Therefore, on sunny days, electrical equipment with power consumption of up to 14W at DC3V can be used. - Examples include portable radio cassettes, etc. If the formation area of the solar cell is further increased, a larger output can be obtained.

(Example 2) In a beach parasol type solar cell parasol having the configuration shown in FIG. 1, transparent PET was used as a light-shielding cloth, and solar cells were formed on the back side of the solar radiation surface. Furthermore, vinyl was coated on the formed solar cell as a surface protective layer and a reinforcing material for the light-shielding cloth. The extraction electrode of the solar cell, the rib of the umbrella, and the shaft of the umbrella were connected in the same manner as in Example 1, and electric power was extracted from the connector output terminal 105.

Tandem type amorphous silicon is used as a solar cell.
Amorphous silicon germanium (a-Si/ a-
SiGe) solar cells were used. a-Si/ between bones
A-3iGe solar cells 2400 cm in 122 stages
'' and these were connected in parallel on eight sides as shown in Figure 5.

At this time, the output is AMl, 5, about DC12V.

It was about 120W.

Therefore, on sunny days, electrical equipment with power consumption of up to 120 W at 2 V DC can be used. Examples include various electrical devices such as radio cassettes, video cameras, electric fans, and small cooler boxes. It can also be used to charge batteries.

(Example 3) As a beach umbrella-type solar cell parasol with the configuration shown in Fig. 1, the light-shielding cloth was made of a colored polymer film with aesthetics in mind, and nCd5/pc was used on the solar radiation side.
A uInse* solar cell was formed and coated with resin as a surface protective layer and reinforcing material.

Connect the extraction electrode of the solar cell and the umbrella bone near the umbrella shaft, connect the umbrella bone and the umbrella shaft in the shape shown in FIG. I took it out.

As shown in Fig. 4, the solar cells were formed in 8 stages of 2400c+n'' in series on each of the seven sides, and the seven sides were further connected in series.At this time, the output was AMl, 5, and about D.
C1.2V, about 45W.

Therefore, electrical equipment with power consumption of up to DC 12V and 45W can be used in sunny weather.

All of the solar cell parasols of Examples 1 to 3 above have good durability, are inexpensive to manufacture, have the same weight as conventional parasols or beach umbrellas, and do not short-circuit even if they get wet with water. , safety was also sufficient.

Note that the present invention is not limited to the above embodiments.

[Effects of the Invention] As explained above, a film-like material on which solar cells are directly formed is used as a light-shielding cloth, and a part or all of the umbrella rib is connected to the lead-out electrode of the solar cell to serve as an electrode. The shaft of the umbrella has a coaxial wire structure, and a part of the umbrella bone is connected to the center conductor of the coaxial wire, and the other part is connected to the outer conductor of the coaxial wire, and the shaft is passed through the umbrella and installed in the handle part. By extracting power from the connected output terminal, we were able to provide a highly durable, lightweight, highly safe, and highly practical portable power source/shading device at low material and manufacturing costs.

Furthermore, by changing the connection method between the umbrella ribs and the shaft, we were able to provide portable power supplies with various outputs that correspond to various loads.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view explaining the basic structure of the present invention, Fig. 2 is a cross-sectional view explaining the structure of the light-shielding cloth of the present invention, and Fig. 3 is a solar cell, an umbrella rib, and an umbrella shaft in the present invention. FIG. 4.5 is an explanatory diagram showing an example of the method of connecting the umbrella rib and the umbrella shaft of the present invention. 101... Shade cloth 102... Coaxial umbrella shaft 103.305... Center conductor 104.306... Outer conductor (inner conductor) 105... Output terminal 106.303... Center conductor Umbrella bones 107, 304 connected to the (inner conductor)...Umbrella bones 201, connected to the outer conductor...Film-like substance 202...Transparent electrode 203...Back electrode 204, 301...・Solar cell 205...Surface protection layer/reinforcing layer 302...Extraction electrode of solar cell

Claims (3)

[Claims] (1) A portable power source and light shielding device characterized in that the power source is a light shielding member made of a film-like material on which solar cells are formed. (2) In an umbrella that has a light shielding member formed with a solar cell, a shaft that supports the light shielding member, and an output terminal provided on the shaft or the handle, the electric power generated by the solar cell is
A portable power supply and light shielding device, characterized in that it is taken out from the output terminal through the shaft of the umbrella. (3) The rib of the umbrella is used as the lead-out electrode of the solar cell, and the bone is connected to the inner conductor and outer conductor of the shaft of the umbrella having a coaxial linear structure to extract a desired electromotive force. The portable power supply and light shielding device according to claim 2.