JPH03133001A - Writing implement equipped with solar cell illumination - Google Patents

Abstract

PURPOSE:To illuminate a portion near at hand and make unnecessary the cost of batteries and battery exchange by providing a power accumulating means for accumulating generated power of a solar cell, and an illuminating means using the power accumulating means as its power supply. CONSTITUTION:Power that a solar cell 2 generates is accumulated in a secondary battery, and when a switch 6 is pushed and on, power is fed from the secondary battery to an illuminating means 3 so that the illuminating means 3 is lighted. Light emitted by the illuminating means 3 is efficiently collected by a light reflecting member 4 and a light collecting member 5 so that a place where writing is performed is illuminated. The use of generated power of the semi-permanent solar cell as the power supply of illumination makes battery exchange work and the cost of batteries unnecessary and the cost for maintenance is not required.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a writing instrument with solar cell illumination.

[Prior Art] Conventionally, lighting devices have been attached to some writing instruments to make it easier to write even in places with low illuminance.

[Problem that the invention seeks to solve] However,
Most of the conventional examples described above use a power source such as a dry battery (there are drawbacks such as the hassle of replacing batteries and the need for battery-operated devices).

[Means for Solving the Problems] The present invention is characterized by comprising a writing means, a solar cell, a power storage means for storing power generated by the solar cell, and a lighting means using the power storage means as a power source. The purpose of the present invention is to solve the above-mentioned problems with a solar cell-illuminated writing instrument.

[Function] By using the lighting means that stores the power generated by the solar cell and uses it as a power source, it is possible to illuminate the vicinity, and the cost of batteries and the trouble of replacing batteries are unnecessary.

[Example] (Example 1) Fig. 1 is a schematic diagram showing an example of a writing instrument with a solar cell illumination device of the present invention.

In FIG. 1, l is the solar cell-illuminated writing instrument of the present invention;
2 is a solar cell, 3 is a lighting means such as a miniature light bulb, 4 is a light reflecting member, 5 is a condensing member such as a lens, 6 is a switch, and 7 is a writing member such as a ballpoint pen. Although not shown in FIG. 1, a secondary battery for storing power generated by the solar cell 2 is provided inside the writing instrument 1.

This writing instrument 1 uses the power generated by the solar cell 2 as a secondary battery (
When the switch 6 is pressed and turned on, power is supplied to the lighting means 3 from the secondary battery (not shown) and the lighting device 3 is turned on. The light emitted by the illumination means 3 is efficiently condensed by the light reflecting member 4 and the condensing member 5, and the place where writing is to be written is illuminated.

FIG. 2 shows an electrical block diagram of the embodiment shown in FIG.

In FIG. 2, 8 is a secondary battery for storing power generated by the solar cell 2, and 9 is a backflow prevention diode provided in the solar cell 2 to prevent current from flowing back from the secondary battery 8.

In addition, in the writing tool of this embodiment, before lighting the illumination means 3 and using it, the solar cell 2 is sufficiently irradiated with light energy such as sunlight, and the power is stored in the secondary battery 8 ( There is a need.

(Example 2) FIG. 3 is a diagram showing a writing instrument with solar battery illumination according to a second example of the present invention.

In FIG. 3, 1 is a writing instrument with solar battery illumination of the present invention;
2 is a solar cell, 3 is a lighting means such as a miniature light bulb, 4 is a light reflecting member, 5 is a condensing member such as a lens, 6 is a switch, 7 is a writing member such as a ballpoint pen, and 10 is a light sensor. Further, although not shown in FIG. 3, a secondary battery for storing power generated by the solar cell 2 is provided inside the writing instrument 1.

This writing instrument l stores the power generated by the solar cell 2 in a secondary battery (not shown), and at the same time when the switch 6 is pressed and turned on, the illuminance measured by the optical sensor 10 is smaller than a preset value. Only occasionally, the lighting means 3, such as a miniature light bulb, is turned on using a charged secondary battery.

The light irradiated by the illumination means 3 is efficiently (collected) by the light reflecting member 4 and the condensing member 5, and the place to be written is illuminated.

FIG. 4 shows an electrical block diagram of the embodiment of FIG. 3.

In FIG. 4, 8 is a secondary battery for storing power generated by the solar cell 2, 9 is a backflow prevention diode provided in the solar cell 2 to prevent current from flowing backward from the secondary battery 8,
Reference numeral 11 indicates a secondary battery 8 when it is determined that the illuminance measured by the optical sensor 10 is smaller than a preset value.
The illuminance determination device is electrically connected to supply power to the switch 6 from the switch 6, and the switch 6 is electrically connected to supply power to the illumination means 3.

In this embodiment as well, before the lighting means 3 is turned on and used, it is necessary to sufficiently irradiate the solar cell 2 with light energy such as sunlight and store electric power in the secondary battery 8.

Further, FIG. 5 is a diagram showing an example of the circuit of this embodiment,
In this embodiment, the illuminance determination device 11 includes a phototransistor optical sensor 10 and a relay 12 as shown in FIG.
The current input to the relay 12 is controlled by the illuminance of the light incident on the phototransistor (optical sensor) IO, and the relay 12 is thereby turned on and off.
It becomes FF, and the illumination means 3 is turned on and off via the switch 6. Note that the circuit of the illuminance determination device 11 is not limited to this embodiment, and it is of course possible to configure it with other circuits.

[Effects of the Invention] As explained above, according to the present invention, in an illuminated writing instrument that illuminates the area around a place to write and allows easy writing even in a place with low illuminance, semi-permanent In order to use the power generated by solar cells as a power source for lighting,
There is no need to worry about replacing batteries, there is no need for battery-operated devices, and there are no maintenance costs.

In addition, by being equipped with a light sensor, it is possible to detect a decrease in the surrounding illuminance and automatically turn on the illumination, making it easy to continue writing even in places where the illuminance changes frequently. It has the effect of becoming

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a first embodiment of the present invention. FIG. 2 is an electrical block diagram of the first embodiment. FIG. 3 is a diagram showing a second embodiment of the present invention. FIG. 4 is an electrical block diagram of the second embodiment. FIG. 5 is a diagram showing an example of a circuit according to the second embodiment. 1. Writing instrument with solar cell lighting 2. Solar cells 3. Lighting means 4. Light reflecting member 5. Light condensing member 6. Switch 7. Writing parts 8. Secondary battery 9. Backflow prevention diode 10. Optical sensor 11. Illuminance determination device

Claims (2)

[Claims] (1) A writing instrument with solar cell illumination, comprising a writing means, a solar cell, a power storage means for storing power generated by the solar cell, and an illumination means using the power storage means as a power source. (2) Claim 1 characterized in that it is equipped with an optical sensor that detects ambient illuminance, and an illuminance determination device that turns on the illumination means when the ambient illuminance is lower than a preset illuminance.
A writing instrument with solar battery illumination described in .