JP2006244711A - Lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting device capable of energy-saving and efficient illumination and capable of restraining loss of a capacity of a storage battery. <P>SOLUTION: At a time zone when the surroundings are not dark yet right after sunset, an energy-saving mode S1 is set with illuminance of an illuminating part 3 suppressed to reduce consumption power of the illuminating part 3 and restrain a discharge volume of each storage battery. When it gets dark, the energy-saving mode S1 is changed over to a standard mode S2 to raise the illuminance of the illuminating part 3 up to an enough level to give people a sense of security. Further, at a late hour of the night when people fall asleep, the standard mode S2 is changed over again to the energy-saving mode S1 to suppress illuminance of the illuminating part 3, reduce consumption power of the illuminating part 3, and suppress a discharge volume of each storage battery 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an illuminating device that charges a storage battery with generated power of a solar battery during the day and performs illumination with discharge power of the storage battery at night.

  Lighting devices such as street lights and nightlights are installed on roadsides, parks, gardens, etc., and turn on at night to illuminate the surrounding area. As this kind of illuminating device, there are not only those that are turned on by the power of a commercial AC power source, but also those that are turned on by a power source that is a combination of a solar battery and a storage battery.

  The latter lighting device using a solar battery and a storage battery has an advantage that it can be lit even when a commercial AC power supply is interrupted due to a disaster such as an earthquake. Some of the former lighting devices that use a commercial AC power source include a storage battery to enable lighting during a power failure.

  Furthermore, when this type of lighting device is installed in the vicinity of a residential area, light pollution measures may be taken to stop the lighting when the residents go to bed.

  For example, Patent Document 1 discloses a lighting device that uses a solar battery and a storage battery. Here, an illuminating device installed in a park or the like is assumed. Usually, a storage battery is charged by generated power of a solar battery during the daytime, and illumination is performed at night by the discharged power of the storage battery. Also, when the daytime of non-sunshine is continuous and the nighttime illumination by the discharge of the storage battery is repeated, the nighttime illumination is stopped when the power consumption of the storage battery is reduced to about 50% and the storage battery becomes overdischarged Thus, a reduction in the life of the storage battery is prevented.

Furthermore, in this lighting device, an earthquake sensor for detecting an earthquake is provided, and when an earthquake is detected by the earthquake sensor, only for one night immediately after the occurrence of the earthquake, even if the storage battery is in an overdischarged state of about 50%, Furthermore, until the power consumption of the storage battery is reduced to about 70 to 80%, it is illuminated throughout the night and serves as a mark for evacuation sites.
Japanese Patent Application Laid-Open No. 10-12007

  However, in the lighting device of Patent Document 1, although an illumination is always performed in an emergency when an earthquake is detected, the emergency lighting mode and the normal lighting mode are the same, and there is a difference between the two. There was nothing at all. For this reason, if sufficient lighting is set with priority given to an emergency, the lighting at the normal time becomes excessive and the power of the storage battery is wasted. On the other hand, if the lighting is suppressed to a level that does not interfere with practical use, giving priority to the normal time, the lighting in an emergency has become insufficient.

  In addition, in order to reduce power consumption, this type of lighting device is often not turned on until sunrise, but turned off until about 12:00 at night. However, since people's lives tend to shift to night, it has been required to turn on the lighting device for a longer time to improve the crime prevention effect. Furthermore, it has been required to turn on the lighting device for a longer time while suppressing the power consumption of the storage battery during a disaster.

  Therefore, the present invention has been made in view of the above-described conventional problems, can perform energy-saving and efficient lighting, can suppress the decrease in the capacity of the storage battery, and is a mark in an emergency. It is an object of the present invention to provide a lighting device that can sufficiently fulfill the role of a person who does not disappoint people's expectations.

  In order to solve the above problems, the present invention provides a lighting unit, a storage battery that supplies power to the lighting unit, a solar cell that supplies charging power to the storage battery, and power supply from the storage battery to the lighting unit. In the lighting device including a control unit for controlling, the control unit includes a determination unit that determines sunset, and when sunset is determined by the determination unit, power is supplied from the storage battery to the illumination unit. By controlling the illumination, the illumination unit is turned on, and the illuminance of the illumination unit is adjusted according to the elapsed time from sunset.

  In the present invention, the control unit sets the illuminance of the illumination unit to either normal illuminance or low illuminance lower than the normal illuminance according to the elapsed time from sunset.

  Furthermore, in the present invention, the controller sets the illuminance of the illumination unit to low illuminance until the elapsed time from sunset reaches a certain time, and then sets the illuminance of the illumination unit to normal illuminance. is doing.

  In the present invention, the control unit switches the illuminance of the illumination unit from the normal illuminance to the low illuminance again after another fixed time has elapsed after switching the illuminance of the illumination unit from low illuminance to normal illuminance. Switching is set.

  Furthermore, in the present invention, the determination means determines sunset based on the output of the solar cell.

  Further, in the present invention, an earthquake sensor for detecting an earthquake is provided, and when the earthquake is detected by the earthquake sensor, the illuminance of the illumination unit is set to the normal illuminance regardless of the elapsed time from sunset. Continue to maintain.

  Furthermore, in the present invention, the determination means determines sunrise, and the control unit maintains the illuminance of the illumination unit at normal illuminance regardless of the elapsed time from sunset, It ends at the timing when sunrise is detected by the judging means.

  In the present invention, the light source of the illumination unit is an LED lamp.

  According to the illumination device of the present invention, the illuminance of the illumination unit (power supplied to the illumination unit) is adjusted according to the elapsed time from sunset in order to suppress the discharge of the storage battery as much as possible.

  For example, depending on the elapsed time from sunset, the illuminance of the illumination unit is set to normal illuminance (referred to as standard mode), or the illuminance of the illumination unit is set to low illuminance lower than the normal illuminance (energy saving) Called mode).

  Immediately after sunset, the sky is still bright and the surroundings are not completely dark, so it does not require very high illumination. Therefore, from sunset to a certain time, an energy saving mode is set and illumination is performed while suppressing discharge of the storage battery.

  When a certain period of time has passed since sunset and the surroundings are completely dark, switch from the energy-saving mode to the standard mode and supply sufficient power from the storage battery to the lighting unit to provide sufficient lighting. Give people a sense of security.

  Furthermore, when the night is completely deepened and people's activities are about to end, the mode is switched again from the standard mode to the energy saving mode, and the area is illuminated while suppressing the discharge of the storage battery, thereby maintaining the crime prevention effect. With this type of conventional lighting device, when there are few people at midnight, the lighting is often turned off, and a crime prevention effect cannot be expected at all. On the other hand, in the present invention, since switching from the standard mode to the energy saving mode is set again, it is possible to illuminate for a long time while suppressing the discharge of the storage battery, and fully play the role of crime prevention. be able to.

  In addition, each time of the energy saving mode and the standard mode may be changed so that it can be adapted to various uses.

  The determination of sunset can be made based on the output of the solar cell. Of course, a light sensor dedicated to determining sunset or sunrise may be used, or sunset or sunrise may be determined based on time.

  In addition, when an earthquake is detected by the earthquake sensor, the standard mode is set regardless of the elapsed time from sunset, so that there is no shortage of emergency lighting.

  And this emergency lighting is finished at the timing of sunrise. This eliminates the feeling of discomfort for the people around you.

  Moreover, the LED lamp with low power consumption is used as a light source of an illumination part. The applied voltage of the LED lamp can be controlled immediately after sunset and at midnight, and can be lit in an energy saving mode with reduced power consumption, and efficient illumination can be performed. Furthermore, it is possible to effectively use the power of a power source composed of a combination of a solar battery and a storage battery.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing Embodiment 1 of the illumination device of the present invention. The illuminating device 1 of this embodiment is installed in a roadside, a park, a garden, etc., turns on at night, and illuminates the surroundings.

  In this illuminating device 1, the illumination unit 3 and the solar cell 5 are provided on the upper part of the support column 2, a plurality of storage batteries 6 and charge / discharge units 7 are vertically arranged in the support column 2, and the earthquake sensor 8 is stored in the lower part of the support column 2. Is arranged. The charging / discharging unit 7 includes a control unit 7a and a DC-DC converter 7b. The charging / discharging unit 7 charges each storage battery 6 with the generated power of the solar battery 5 or supplies the power of each storage battery 6 to the lighting unit 3 for illumination. Turn on part 3. The earthquake sensor 8 is a known horizontal seismic sensor using, for example, a steel ball.

  The support 2 is formed by sheet metal processing of a stainless steel plate having a thickness of 2 mm, and is a quadrangular prism-shaped hollow. The base plate 11 and each reinforcing plate 12 are made by cutting a stainless steel plate.

  The column 2 is passed through the hole 11a of the base plate 11, the base plate 11 is fixed at a position 1 m from the lower end of the column 2, and each side wall of the column 2 and the base plate 11 are connected by the four reinforcing plates 12 to the column 2 The base plate 11 is firmly attached. The support column 2, the base plate 11, and the reinforcing plates 12 are fixed to each other by welding or screwing.

  The upper part of the support column 2 is bent, and the upper side of the bent part is an inclined head part 2a, and the lower side is a vertical trunk part 2b.

  The illuminating unit 3 includes a first lamp unit 21 including three LED lamps 21a having an inclined head 2a, and a second lamp unit 22 including three LED lamps 22a having an inclined head 2a. Each LED lamp 21a, 22a has the same structure, and as shown in FIG. 2, 18 LEDs 23 are geometrically arranged on a substrate 24 along a circle or polygonal line, and each LED 23 and substrate 24 are arranged. It is covered with a light scattering sphere 25, and a base 26 is fixed to the opening end 25 a of the light scattering sphere 25. The LEDs 23 are connected to each other by the wiring pattern of the substrate 24 and further connected to the base 26 via the substrate 24. The light scattering sphere 25 is, for example, a surface of a glass sphere coated with light scattering particles, and scatters light from each LED 23. Each LED 23 has, for example, a full width at half maximum of about 10 degrees and has a narrow directivity in the illumination direction, but the light is scattered by the light scattering sphere 25. For this reason, the directivity as each LED lamp 21a, 22a becomes wide.

  Six circular holes 27 are provided in the lower side wall plate 2c of the inclined head 2a of the column 2, and respective sockets (not shown) are arranged and fixed at the back of each hole 27. The LED lamps 21a and 22a are passed through the holes 27, and the caps 26 of the LED lamps 21a and 22a are inserted and connected to the sockets, and all the LEDs 23 of the LED lamps 21a and 22a are connected to the sockets.

  In this state, the LED lamps 21a and 22a face in the direction orthogonal to the inclined head 2a inclined at 20 to 30 degrees and toward the front vicinity of the column 2. Therefore, the illumination unit 3 illuminates the vicinity of the front of the column 2 with the first and second lamp units 21 and 22.

  Moreover, since each LED lamp 21a, 22a consists of 18 LED23, the power consumption of the illumination part 3 is only about several W, and can reduce power consumption. For this reason, if 2 to 6 12V long-life storage batteries are applied as each storage battery 6, the power source composed of a combination of the solar battery 5 and each storage battery 6 can be used for 5 to 10 days even if there is almost no sunshine time. The illumination unit 3 can be turned on. For this reason, the illuminating device 1 can serve not only as illumination but also as a guide light, a security light, an emergency light in the event of a disaster such as an earthquake.

  The solar cell 5 is supported by a support frame 41, and the support frame 41 is rotatably supported by a shaft 42 that protrudes from the upper end of the vertical trunk portion 2 b of the column 2.

  FIG. 3 is a cross-sectional view showing the solar cell 5, the support frame 41, the shaft 42, and the like. The solar cell 5 has a lifetime of 20 to 30 years. For example, a single-crystal or polycrystalline solar cell is mounted and supported on the back side of a tempered glass having high sunlight transmittance, and a weather-resistant white film is bonded thereto. These are reinforced with EVA (ethylene vinyl acetate copolymer), silicone resin, or the like, and further attached with a connector box 5a. The support frame 41 is formed by sheet metal processing of stainless steel, and supports the edge of the solar cell 5 by hooking it. Further, the central portion of the support frame 41 bulges downward and becomes hollow, and the structural strength of the solar cell 5 and the support frame 41 is increased, and design changes are also provided. The connector box 5a of the solar cell 5 is accommodated here. Further, a cylindrical shaft receiver 43 is provided on the back surface of the support frame 41 so as to be inclined by 70 to 45 degrees with respect to the light receiving surface of the solar cell 5.

  The support frame 41 is rotatably supported by fitting the shaft receiver 43 on the back surface thereof to the shaft 42 at the upper end of the vertical trunk portion 2 b of the column 2. In a state of 70 degrees with respect to the light receiving surface, the light receiving surface of the solar cell 5 is inclined 20 degrees with respect to the horizontal direction. The inclination of 20 degrees is poor in the installation environment of the lighting device 1 such as a lot of light receiving obstacles caused by mountain shadows, nearby buildings, structures, etc., and direct light from the sun is almost incident on the solar cell 5 above the support column 2. When not, it is set so that more indirect light from the sky enters the solar cell 5 in place of the direct light.

  Moreover, when the installation environment of the illuminating device 1 is good and the direct light from the sun is incident on the solar cell 5 above the support column 2, the light receiving surface of the solar cell 5 is preferably inclined approximately 35 degrees with respect to the horizontal direction.

  In areas where there is a little snow in winter and areas where the amount of solar radiation is extremely low throughout the year or in December or January, it is better to tilt approximately 45 degrees to increase the snow sliding effect.

  Further, the support frame 41 is rotated so that the solar cell 5 is directed in the vicinity of the south direction so that the power generated by the solar cell 5 is maximized.

  Next, the solar cell 5, each storage battery 6, the charging / discharging unit 7, and the earthquake sensor 8 are described.

  FIG. 4 is a block diagram schematically showing the solar cell 5, each storage battery 6, the controller 7 a of the charge / discharge unit 7, the DC-DC converter 7 b, and the earthquake sensor 8. Here, the generated power of the solar cell 5 is supplied to the control unit 7a. The control unit 7a charges each storage battery 6 with the generated power of the solar battery 5. In addition, since the power generation voltage Va of the solar cell 5 decreases after sunset, the control unit 7a senses sunset when the power generation voltage Va of the solar cell 5 is equal to or lower than a certain voltage Vn, and A voltage is applied to the illumination unit 3 via the DC-DC converter 7b, and the illumination unit 3 is turned on. Furthermore, the control unit 7a measures the elapsed time from sunset, and adjusts the illuminance of the illumination unit 3 according to the elapsed time to suppress power consumption.

  FIG. 5 is a timing chart showing a process of turning on the illumination unit 3 and controlling the illuminance by the control unit 7 a of the charging unit 7.

  The control unit 7a lights up the illumination unit 3 at sunset. Moreover, in order to suppress the discharge of each storage battery 6 as much as possible, the illuminance of the illumination unit 3 (power supplied to the illumination unit 3) is adjusted according to the elapsed time from sunset. For example, depending on the elapsed time from sunset, the illuminance of the illumination unit 3 is set to normal illuminance (referred to as standard mode S2), or the illuminance of the illumination unit 3 is set to low illuminance lower than the normal illuminance. Yes (referred to as energy saving mode S1).

  The adjustment of the illuminance of the illuminating unit 3 (power supplied to the illuminating unit 3) is performed by, for example, turning on both the first and second lamps 21 and 22 of the illuminating unit 3 or turning on only the first lamp 21 and the second lamp. This can be done by turning off 22. Alternatively, it can be performed by adjusting the duty ratio of the pulse voltage supplied from the DC-DC converter 7b to the illumination unit 3.

  Now, if the control part 7a detects the sunset from which the power generation voltage Va of the solar cell 5 becomes below the fixed voltage Vn, it will apply the voltage of each storage battery 6 to the illumination part 3 via the DC-DC converter 7b, The illumination unit 3 is turned on. Then, the control unit 7a measures the elapsed time from the sunset time point T31 (lighting time of the lighting unit 3), and until the elapsed time reaches a certain time until the time point Ta, that is, the day is Immediately after the end of the day, the time zone from time T31 to time Ta when the surroundings are bright and strong lighting is not necessary is set with the energy saving mode S1 in which the illuminance of the illuminating unit 3 is suppressed, and the power consumption of the illuminating unit 3 is reduced. The discharge amount of the storage battery 6 is suppressed.

  Next, the control unit 7a switches from the energy saving mode S1 to the standard mode S2 and sets the illuminance of the illuminating unit 3 to a sufficient level when the elapsed time measured from sunset reaches a certain time and reaches a time point Ta. To increase. Thereby, even if a periphery becomes dark, the illumination intensity of the illuminating device 1 increases, the circumference | surroundings of the illuminating device 1 become bright, and a sense of security is given to people. However, the power consumption of the illumination part 3 increases and the discharge amount of each storage battery 6 also increases.

  Further, the control unit 7a, when another fixed time elapses from the time point Ta and reaches the time point Tb, until the time point T32 is reached from the time point Tb, that is, when the night is fully deepened and people's lives are about to end. In the time period from Tb to time T32, the switching from the standard mode S2 to the energy saving mode S1 is performed again, the illuminance of the illumination unit 3 is suppressed, the power consumption of the illumination unit 3 is reduced, and the discharge amount of each storage battery 6 is suppressed. .

  Then, the control unit 7a turns off the illumination unit 3 after time T32 to prevent useless power consumption.

  Thus, in the time zone where the surroundings are still bright immediately after the sunset, the energy saving mode S1 in which the illuminance of the illumination unit 3 is suppressed is set to reduce the power consumption of the illumination unit 3, and the discharge amount of each storage battery 6 Is suppressed. When the surroundings become dark, the energy saving mode S1 is switched to the standard mode S2, and the illuminance of the illumination unit 3 is increased to a sufficient level to give people a sense of security. In addition, during the time when the night is completely deep and people's lives are about to end, the standard mode S2 is switched to the energy-saving mode S1 again to reduce the illuminance of the lighting unit 3 and reduce the power consumption of the lighting unit 3. The amount of discharge of each storage battery 6 is suppressed.

  In the case where the role of the lighting device 1 as a safety light or emergency light is emphasized, the lighting in the energy saving mode S1 may be continued until the dawn until the remaining power of the storage battery 5 does not fall below a certain value. .

  Alternatively, the time zone from time T31 to time Ta when the lighting in the energy saving mode S1 is performed, the time zone from time Tb to the time T32, and the time zone from time Ta to the time Tb when the lighting in the standard mode S2 is performed are as follows. It may be changed according to the intended use. Moreover, the illumination part 3 can also be turned on all night by extending extinction of the illumination part 3 to the time T33 of the sunrise. The determination of sunrise may be performed based on the power generation voltage of the solar cell 5 as in the case of sunset.

  Next, the lighting unit lighting and illuminance control process in the event of an earthquake will be described.

  In normal times, the lighting and illuminance control shown in the timing chart of FIG. 5 is performed, but in the event of an earthquake, the lighting and illuminance shown in the timing chart of FIG. 6 are used instead of the lighting and illuminance control of FIG. Control.

  That is, the control unit 7a determines whether or not an earthquake has occurred based on the detection output of the earthquake sensor 8, and when determining that an earthquake has occurred, instead of the lighting control shown in the timing chart of FIG. The lighting control shown in any one of the timing charts (b) to (e) is performed.

  FIG. 6A is a timing chart showing from sunset to sunrise, and FIGS. 6B to 6E show respective control processes according to various timings of occurrence of earthquakes.

  First, as shown in FIG. 6B, it is assumed that an earthquake occurred at time T41 during the daytime. In this case, the control unit 7a determines that an earthquake has occurred based on the detection output of the earthquake sensor 8 at time T41 during the daytime. And the control part 7a will apply the voltage of each storage battery 6 to the illumination part 3 via the DC-DC converter 7b, if the sunset which the electric power generation voltage Va of the solar cell 5 becomes below the fixed voltage Vn is detected, The illumination unit 3 is turned on and the standard mode S2 is set. Further, when the control unit 7a senses the sunrise when the power generation voltage Va of the solar cell 5 exceeds a certain voltage Vn at time T42, the control unit 7a stops the power supply from each storage battery 6 to the illumination unit 3, and the illumination unit 3 is turned off. Turn off the light.

  Further, as shown in FIG. 6C, when an earthquake occurs at time T41 after the time T32 when the illumination of the lighting unit 3 ends and before sunrise, the control unit 7a at time T41, the earthquake sensor It is determined that an earthquake has occurred based on the detection output of No. 8, and since the power generation voltage Va of the solar cell 5 is not more than a certain voltage Vn at this time, power supply from each storage battery 6 to the lighting unit 3 is started. Then, the illumination unit 3 is turned on and the standard mode S2 is set. And the control part 7a will stop the electric power supply from each storage battery 6 to the illuminating part 3, if the sunrise over which the electric power generation voltage Va of the solar cell 5 exceeds the fixed voltage Vn is detected at the time T42, and the illuminating part 3 is made. Turn off the light.

  Further, as shown in FIG. 6 (d) or (e), when an earthquake occurs at the time T41 at night when illumination is performed in the standard mode S2 or the energy saving mode S1, the control unit 7a At time T41, it is determined that an earthquake has occurred based on the detection output of the earthquake sensor 8, and the standard mode S2 is continuously set or switched from the energy saving mode S1 to the standard mode S2. And the control part 7a will stop the electric power supply from each storage battery 6 to the illumination part 3, if the solar power generation voltage Va of the solar cell 5 senses the sunrise over the fixed voltage Vn at the time T42.

  Therefore, when an earthquake occurs, illumination in the standard mode S2 is performed. For this reason, the illuminating device 1 can also play the role of an emergency light at the time of disasters, such as a guide light, a security light, and an earthquake.

  Also, when an earthquake occurs, a power outage can take several days. For this reason, the control unit 7a performs illumination in the standard mode S2 from sunset to sunrise the next day, for example, on the day when the earthquake occurs. As a result, in the event of an earthquake, bright night lighting by the lighting device 1 will be continued for three days, and the impression given to people will increase, and the role of the lighting device 1 as a refuge location will be sufficiently fulfilled. Can do. For example, when the lighting device 1 is installed in a park, many people can be notified that the park is an evacuation site.

  Next, control of power supply from each storage battery 6 to the illumination unit 3 will be described.

  The lighting device 1 not only controls the lighting and illuminance of the lighting unit 3, but also controls the power supply from each storage battery 6 to the lighting unit 3 according to the state of charge of each storage battery 6. Prevents a decrease in service life.

  The control unit 7a includes the voltage Vb of each storage battery 6, the preset full charge voltage V0, the first overdischarge voltage V1, the second overdischarge voltage V2, and the third overdischarge voltage V3 as shown in FIG. , And the charge or discharge state of each storage battery 6 is managed based on the comparison result, and the life of each storage battery 6 is prevented from decreasing.

  For example, if the charging from the solar battery 5 to each storage battery 6 is performed without limitation during the daytime, each storage battery 6 may be overcharged, and the life of each storage battery 6 may be reduced. For this reason, when each storage battery 6 is in a fully charged state and the voltage Vb of each storage battery 6 rises and reaches the full charge voltage V0, the charging control unit 7a stops charging each storage battery 6 and each storage battery 6 6 is prevented from decreasing the service life.

  Moreover, when the power supply from each storage battery 6 to the illumination unit 3 is performed without limitation at night, the overdischarge state of each storage battery 6 proceeds, and the life of each storage battery 6 decreases. For this reason, when each storage battery 6 is in an overdischarged state of about 50% and the voltage Vb of each storage battery 6 decreases and reaches the first overdischarge voltage V1, the charging control unit 7a starts from each storage battery 6 to the DC-DC converter. The power supply to the illumination unit 3 is stopped via 7b. Thereby, the overdischarge state of each storage battery 6 can be suppressed, and the lifetime reduction of each storage battery 6 can be prevented.

  In an emergency where an earthquake is detected, lighting of the lighting device 1 is necessary, and the lighting at this time is given priority over the life reduction of each storage battery 6. For this reason, when the charging control unit 7a determines that an earthquake has occurred based on the detection output of the earthquake sensor 8, even if the voltage Vb of each storage battery 6 reaches the first overdischarge voltage V1, the DC- The power supply to the illumination unit 3 is continued via the DC converter 7b, and the illumination unit 3 is turned on.

  Further, in an emergency where an earthquake is detected, for example, in the state where the illumination unit 3 is illuminated in the standard mode S2 in which the power consumption is relatively large, the power supply amount of each storage battery 6 is large, and the illumination device 1 is illuminated. The period will be shortened. For this reason, when each storage battery 6 is in an overdischarged state of about 40% and the voltage Vb of each storage battery 6 reaches the second overdischarge voltage V2 lower than the first overdischarge voltage V1, the control unit 7a Only the 2nd lamp unit 22 of the part 3 is light-extinguished, and the illumination intensity of the illumination part 3 is restrained lower than usual. Thereby, the power consumption of the illumination part 3 at the time of emergency is reduced, and the illumination period of the illuminating device 1 can be extended.

  And the control part 7a continues the electric power supply from each storage battery 6 to the illumination part 3, each storage battery 6 will be in an overdischarge state of about 20%, and the voltage Vb of each storage battery 6 is more than 2nd overdischarge voltage V2. When the third overdischarge voltage V3 is reached, power supply from each storage battery 6 to the illumination unit 3 via the DC-DC converter 7b is stopped, and the illumination unit 3 is turned off. Thereby, even in an emergency, a limit is given to the overdischarge state of each storage battery 6, and recharge of each storage battery 6 is attained.

  Next, the configuration and operation of the controller 7a and the DC-DC converter 7b of the charge / discharge unit 7 will be described in further detail.

  FIG. 8 is a circuit diagram schematically showing the control unit 7a, the DC-DC converter 7b, and the periphery thereof. As shown in FIG. 8, the positive and negative electrodes of the solar cell 5 are connected to the terminals A and G of the control unit 7a, respectively, and the positive and negative electrodes of the storage batteries 6 are connected to the terminals B and G of the control unit 7a, respectively. The negative electrode of the solar cell 5, the negative electrode of each storage battery 6, and the terminal G are grounded. In the control unit 7a, the FET Q1 and the reverse current prevention diode D1 are connected in series between the terminals A and B, and the FET Q1 is controlled to be turned on and off by the charging circuit 71 to charge each storage battery 6. The overcharge of each storage battery 6 is prevented.

  Further, the positive electrode of the first lamp unit 21 of the illumination unit 3 is connected to the output terminal D of the DC-DC converter 7b, and the negative electrode of the first lamp unit 21 is connected to the terminal E of the control unit 7a, the current limiting resistor R1-1, and Grounded through terminal G. Further, the positive electrode of the second lamp unit 22 of the illumination unit 3 is connected to the output terminal D of the DC-DC converter 7b, and the negative electrode of the second lamp unit 22 is connected to the terminal F of the control unit 7a, the current limiting resistor R1-2, and the FET Q3. , And the terminal G. In the control unit 7a, the FET Q2 is inserted between the terminal G and the input terminal C of the DC-DC converter 7b, and the FET Q2 is controlled to be turned on / off by the lighting / extinguishing circuit 72 so that the first and second lamps are supplied from the DC-DC converter 7b. The power supply to the units 21 and 22 is controlled, and the first and second lamp units 21 and 22 are turned on and off. The lights are turned on for a certain time from sunset, the lights are turned on in the event of an earthquake, and an earthquake has occurred. When the voltage Vb of each storage battery 6 becomes lower than the first overdischarge voltage V1 in the normal lighting state, the voltage Vb of each storage battery 6 is overdischarged in the emergency lighting state in the event of an earthquake. The light is turned off when the voltage is lower than V3.

  The current limiting resistor R1-1 is also used as a current detecting resistor of the first lamp unit 21. Since the first and second lamp units 21 and 22 have the same configuration and the same current flows, if the current of the first lamp unit 21 is detected, the current of the second lamp unit 22 is also known.

  Further, the controller 7a controls the on / off of the FET Q3 by the illuminance circuit 73. When the voltage Vb of each storage battery 6 becomes lower than the second overdischarge voltage V2 in the event of an earthquake, the second lamp unit 22 is turned off. .

  FIG. 9 is a circuit diagram showing the charging circuit 71 of the controller 7a. FIG. 10 is a timing chart showing each signal in the charging circuit 71. The operation of the charging circuit 71 will be described with reference to FIGS. 9 and 10.

  Here, the voltage Vb of each storage battery 6 is divided by the resistors R3 and R4, and the terminal voltage of the resistor R4 is applied to the inverting input terminal of the comparator CMP1. Further, by adjusting the variable resistor R2 to which a constant voltage is applied, the voltage level of the non-inverting input terminal of the comparator CMP1 is adjusted to the resistance R4 when the voltage Vb of each storage battery 6 reaches the full charge voltage V0. The terminal voltage is set. Therefore, the comparator CMP1 can determine whether or not the voltage Vb of each storage battery 6 has reached the full charge voltage V0 by comparing the terminal voltage of the resistor R4 with the voltage set by the variable resistor R2. .

  When the voltage Vb of each storage battery 6 is less than the full charge voltage V0, the output of the comparator CMP1 becomes high level, the / S terminal input of the RS flip-flop FF1 becomes high level, and the Q terminal of the RS flip-flop FF1 The output is kept low. The FET Q1 in FIG. 8 is turned on by the low level of the Q terminal output, the current path from the solar cell 5 to each storage battery 6 is conducted, and each storage battery 6 is charged.

  At time T1, each storage battery 6 becomes fully charged, and when the voltage Vb of each storage battery 6 becomes equal to or higher than the full charge voltage V0, the output of the comparator CMP1 becomes low level, and the / S terminal input of the RS flip-flop FF1 becomes low. As a result, the Q terminal output of the RS flip-flop FF1 becomes a high level.

  When the Q terminal output of the RS flip-flop FF1 becomes high level, the FET Q1 in FIG. 8 is switched from on to off, and the current path from the solar cell 5 to each storage battery 6 is interrupted. Thereby, charge of each storage battery 6 is stopped and overcharge of each storage battery 6 is prevented.

  When the Q terminal output of the RS flip-flop FF1 becomes high level, the / RS terminal input of the oscillator OSC1 also becomes high level. In response to this, the oscillator OSC1 starts outputting a pulse signal having a constant period. The counter CNT1 binary counts the pulse signal from the oscillator OSC1.

Next, at time T2, when the binary count value binary counted by the counter CNT1 reaches a preset value, for example, 8192 (= 2 ^14-1 ), the counter CNT1 sets the Q14 terminal output to the high level. To do.

  When the Q14 terminal output of the counter CNT1 becomes high level, the output of the NOT circuit NOT1 becomes low level, the / R terminal input of the RS flip-flop FF1 becomes low level, the RS flip-flop FF1 is reset, and the RS flip-flop The Q terminal output of FF1 becomes low level. Along with this, the / Q terminal output of the RS flip-flop FF1 becomes high level, the counter CNT1 is reset by the high level of this / Q terminal output, the Q14 terminal output of the counter CNT1 returns to low level, and the RS flip-flop FF1 / R terminal input returns to high level. Thereby, the charging circuit 71 is returned to the original state.

  Similarly, if each storage battery 6 is in a fully charged state and the voltage Vb of each storage battery 6 is equal to or higher than the full charge voltage V0, the Q of the RS flip-flop FF1 is used only during the counting period of the pulse signal of the oscillator OSC1 by the counter CNT1. The terminal output is maintained at a high level, the FET Q1 in FIG. 8 is switched from on to off, charging of each storage battery 6 is stopped, and overcharging of each storage battery 6 is prevented.

  Note that the period during which charging of each storage battery 6 is stopped can be adjusted by setting the oscillation cycle of the oscillator OSC1 or from which output terminal of the counter CNT1 to detect.

  FIG. 11 is a circuit diagram showing the turn-on / off circuit 72 of the controller 7a. 12 and 13 are timing charts showing respective signals in the lighting / extinguishing circuit 72. FIG. The operation of the turn-on / off circuit 72 will be described with reference to FIGS.

  Here, the voltage Vb of each storage battery 6 is divided by the resistors R7 and R8, and the terminal voltage of the resistor R8 is applied to the inverting input terminal of the comparator CMP2. Further, by adjusting the variable resistor R6 to which a constant voltage is applied, the voltage level of the non-inverting input terminal of the comparator CMP2 is set to the resistance when the voltage Vb of each storage battery 6 reaches the first overdischarge voltage V1. The terminal voltage of R8 is set. Therefore, the comparator CMP2 compares the terminal voltage of the resistor R8 with the voltage set by the variable resistor R6, and determines whether or not the voltage Vb of each storage battery 6 has reached the first overdischarge voltage V1. Can do.

  Further, the generated voltage Va of the solar cell 5 is divided by the resistors R10 and R11, and the terminal voltage of the resistor R11 is applied to the non-inverting input terminal of the comparator CMP3. Further, by adjusting the variable resistor R12 to which a constant voltage is applied, the voltage level of the inverting input terminal of the comparator CMP3 is reduced to the resistance R11 when the power generation voltage Va of the solar cell 5 is lowered to the voltage after sunset. The terminal voltage is set. Therefore, the comparator CMP3 can determine whether or not it is after sunset by comparing the voltage set by the variable resistor R12 with the terminal voltage of the resistor R11.

  Further, the detection output of the earthquake sensor 8 is applied to the non-inverting input terminal of the comparator CMP4 through the low pass filter LPF. Further, by adjusting the variable resistor R15 to which a constant voltage is applied, the voltage level of the inverting input terminal of the comparator CMP4 is slightly lower than the output level of the low-pass filter LPF when an earthquake is detected by the earthquake sensor 8. Is set high. Therefore, the comparator CMP4 can determine whether an earthquake has occurred by comparing the voltage set by the variable resistor R15 with the output level of the low-pass filter LPF.

  Further, the voltage Vb of each storage battery 6 is divided by the resistors R22 and R23, and the terminal voltage of the resistor R23 is applied to the inverting input terminal of the comparator CMP6. Further, by adjusting the variable resistor R21 to which a constant voltage is applied, the voltage level of the non-inverting input terminal of the comparator CMP6 is set to the resistance when the voltage Vb of each storage battery 6 reaches the third overdischarge voltage V3. The terminal voltage of R23 is set. Therefore, the comparator CMP6 compares the terminal voltage of the resistor R23 with the voltage set by the variable resistor R21, and determines whether or not the voltage Vb of each storage battery 6 has reached the third overdischarge voltage V3. Can do.

  Further, the voltage Vb of each storage battery 6 is divided by the resistors R22 and R23, and the terminal voltage of the resistor R23 is applied to the inverting input terminal of the comparator CMP6. Further, by adjusting the variable resistor R21 to which a constant voltage is applied, the voltage level of the non-inverting input terminal of the comparator CMP6 is set to the resistance when the voltage Vb of each storage battery 6 reaches the third overdischarge voltage V3. The terminal voltage of R23 is set. Therefore, the comparator CMP6 compares the terminal voltage of the resistor R23 with the voltage set by the variable resistor R21, and determines whether or not the voltage Vb of each storage battery 6 has reached the third overdischarge voltage V3. Can do.

  When the earthquake does not occur, the detection output of the earthquake sensor 8 does not change, the output of the comparator CMP4 becomes high level, and the / R terminal input of the RS flip-flop FF2 also becomes high level. At this time, the Q terminal output of the RS flip-flop FF2 is at the high level, and the output of the NOR circuit NOR3 is continuously maintained at the low level.

  In this state, the output level of the NOR circuit NOR4 changes in response to only the output level from the NOR circuit NOR2, since the output of the NOR circuit NOR3 is maintained at a low level.

  In the normal time of FIG. 12, since the generated voltage of the solar cell 5 is high during the daytime, the voltage level of the non-inverting input terminal of the comparator CMP3 is high, and the output of the comparator CMP3 is high. Therefore, one input of the NOR circuit NOR2 becomes high level, the output of the NOR circuit NOR2 becomes low level, and the output of the NOR circuit NOR4 becomes high level. The FET Q2 in FIG. 8 is turned off by the high level of the output of the NOR circuit NOR4, the current path from each storage battery 6 to the illumination unit 3 via the DC-DC converter 7b is cut off, and the illumination unit 3 is turned off.

  When sunset occurs at time T11 in FIG. 12 (corresponding to time T31 in FIG. 5), the solar cell 5 does not generate power, so the voltage level at the non-inverting input terminal of the comparator CMP3 becomes low, and the comparator CMP3. Becomes the low level, and one input of the NOR circuit NOR2 becomes the low level.

  At this time, if the state of charge of each storage battery 6 is good, the voltage Vb of each storage battery 6 exceeds the first overdischarge voltage V1, and therefore the output of the comparator CMP2 is maintained at a low level. Further, the Q14 terminal output of the counter CNT2 is initially set to a low level. For this reason, the other two inputs of the NOR circuit NOR2 are also at a low level.

  Accordingly, the three inputs of the NOR circuit NOR2 become low level, the output of the NOR circuit NOR2 becomes high level, and the output of the NOR circuit NOR4 becomes low level. The FET Q2 of FIG. 8 is turned on by the low level of the output of the NOR circuit NOR4, the current path from each storage battery 6 to the illumination unit 3 through the DC-DC converter 7b is conducted, and the illumination unit 3 is turned on.

  Further, the two inputs of the NOR circuit NOR1 are also at a low level, the output level of the NOR circuit NOR1 is at a high level, the / RS terminal input of the oscillator OSC2 is also at a high level, and the pulse signal output by the oscillator OSC2 is output at a constant cycle. Is started. The counter CNT2 binary counts the pulse signal from the oscillator OSC2.

Next, at time T12 in FIG. 12 (corresponding to time T32 in FIG. 5), the binary count value binary counted by the counter CNT2 reaches a preset value, for example, 8192 (= 2 ^14-1 ). Then, the counter CNT2 sets the Q14 terminal output to the high level.

  When the Q14 terminal output of the counter CNT2 becomes high level, one input of the NOR circuit NOR2 becomes high level, the output of the NOR circuit NOR2 becomes low level, and the output of the NOR circuit NOR4 becomes high level. The FET Q2 in FIG. 8 is turned off by the high level of the output of the NOR circuit NOR4, the current path from each storage battery 6 to the illumination unit 3 via the DC-DC converter 7b is cut off, and the illumination unit 3 is turned off.

  Further, since one input of the NOR circuit NOR1 becomes high level and the output of the NOR circuit NOR1 becomes low level, the output of the pulse signal with a constant cycle by the oscillator OSC2 is stopped, and the output of the Q14 terminal of the counter CNT2 becomes high. The level is maintained, and the low level output of the NOR circuit NOR2 and the high level output of the NOR circuit NOR4 are also maintained.

  Accordingly, the illumination unit 3 is turned on for a certain period of time from sunset until the end of the constant counting by the counter CNT2, that is, the illumination unit 3 is turned off. This constant lighting time can be set to any time as described above, and can also be set from sunset to sunrise.

  Thereafter, at sunrise at time T13 in FIG. 12, since the power generated by the solar cell 5 increases, the voltage level of the non-inverting input terminal of the comparator CMP3 becomes high, and the output of the comparator CMP3 becomes high level. Therefore, the count value of the counter CNT2 returns to the initial value by this high level output, and the output of the counter CNT2 returns to the low level.

  However, even if the output of the counter CNT2 returns to the low level, the output of the comparator CMP3 is at the high level and the other input of the NOR circuit NOR2 is at the high level. The high level output of the NOR circuit NOR4 is maintained, the FET Q2 in FIG. 8 remains off, and the illumination unit 3 continues to be turned off.

  Thereafter, in the same manner, for each daily sunset, the illumination unit 3 is turned on for a fixed time from the sunset, and then the illumination unit 3 is turned off.

  Moreover, the days of non-sunshine continue, the power of each storage battery 6 is consumed only by lighting of the illumination unit 3, and the amount of power of each storage battery 6 does not increase. Therefore, at each time point T14 in FIG. When the voltage Vb of 6 becomes equal to or lower than the first overdischarge voltage V1, the output of the comparator CMP2 becomes high level.

  In this case, since one input of the NOR circuit NOR2 is maintained at a high level, the low level output of the NOR circuit NOR2 and the NOR circuit NOR4 are output regardless of the output level of the comparator CMP3, that is, day and night. The high level output is maintained, the FET Q2 in FIG. 8 remains off, and the illumination unit 3 continues to be turned off. Thereby, the overdischarge state of each storage battery 6 is suppressed, and the lifetime reduction of each storage battery 6 is prevented.

  Next, as shown in FIG. 13, when an earthquake occurs at time T21, the current path is repeatedly interrupted by the earthquake sensor 8, the output level of the low-pass filter LPF decreases, the output of the comparator CMP4 becomes low level, and RS The / R terminal input of the flip-flop FF2 becomes high level, the Q terminal output of the RS flip-flop FF2 becomes low level, and one input of the NOR circuit NOR3 becomes low level.

  At this time, since the solar cell 5 does not generate power at night, the voltage level of the non-inverting input terminal of the comparator CMP3 becomes low and the output of the comparator CMP3 becomes low level. If the voltage Vb of each storage battery 6 exceeds the third overdischarge voltage V3, the output of the comparator CMP6 is maintained at a low level. For this reason, the other two inputs of the NOR circuit NOR3 are also at a low level.

  Accordingly, the three inputs of the NOR circuit NOR3 become low level, the output of the NOR circuit NOR3 becomes high level, and the output of the NOR circuit NOR4 becomes low level. The FET Q2 of FIG. 8 is turned on by the low level of the output of the NOR circuit NOR4, the current path from each storage battery 6 to the illumination unit 3 through the DC-DC converter 7b is conducted, and the illumination unit 3 is turned on.

  The DC-DC converter 7b includes a FET Q4, a reactor 82, a diode 83, and a capacitor 84. As shown in FIG. 14, the FET Q4 is turned on, a current Iq4 flows through the FET Q4, and energy is stored in the reactor 82. The FET Q4 is turned off, the flow of the current Iq4 of the FET Q4 is stopped, the energy of the reactor 82 is charged into the capacitor 84, and this is repeated to output the boosted voltage. VL is the voltage of the reactor 82, IL is the current of the reactor 82, ID2 is the current of the diode 83, and Vq4 is the voltage of the FET Q4.

  Next, at sunrise at time T22 in FIG. 13, since the power generation voltage of the solar cell 5 rises at sunrise, the voltage level of the non-inverting input terminal of the comparator CMP3 becomes high, and the output of the comparator CMP3 becomes high level. Thus, the other input of the NOR circuit NOR3 becomes high level. For this reason, the output of the NOR circuit NOR3 becomes low level, and the output of the NOR circuit NOR4 becomes high level. Due to the high level of the output of the NOR circuit NOR4, the FET Q2 in FIG. 8 is turned off, and the illumination unit 3 is turned off.

  The counter CNT3 inputs the output of the comparator CMP3 via the knot circuit NOT3. When the output of the knot circuit NOT3 changes from the high level to the low level, the counter CNT3 increments the count value and the number of sunrises. Count.

  As described above, during the daytime, the output of the NOR circuit NOR2 is also at a low level, so that the output of the NOR circuit NOR4 is always at a high level.

  Next, when sunset occurs at time T23 in FIG. 13, since the solar cell 5 does not generate power, the voltage level of the non-inverting input terminal of the comparator CMP3 becomes low and the output of the comparator CMP3 becomes low level. , One input of NOR3 becomes low level.

  Also at this time, the Q terminal output of the RS flip-flop FF2 is maintained at a low level. If the voltage Vb of each storage battery 6 exceeds the third overdischarge voltage V3, the output of the comparator CMP6 is maintained at a low level. For this reason, the other two inputs of the NOR circuit NOR3 are also at a low level.

  Accordingly, the three inputs of the NOR circuit NOR3 become low level, the output of the NOR circuit NOR3 becomes high level, and the output of the NOR circuit NOR4 becomes low level. The FET Q2 in FIG. 8 is turned on by the low level of the output of the NOR circuit NOR4, and the illumination unit 3 is turned on.

  In the event of an earthquake, the NOR circuit NOR1, NOR circuit NOR2, oscillator OSC2, and counter CNT2 are operating, but the output of the NOR circuit NOR3 is output during the period when the output of the NOR circuit NOR2 is high. Is always at a high level, the output level of the NOR circuit NOR2 can be ignored.

  Further, when the lighting unit 3 is turned on, the power of each storage battery 6 is consumed, the voltage Vb of each storage battery 6 becomes equal to or lower than the first overdischarge voltage V1, and the output of the comparator CMP2 becomes high level, the NOR circuit NOR2 The one input becomes a high level, and the output of the NOR circuit NOR2 becomes a low level. At this time, the output level of the NOR circuit NOR4 changes in response to only the output level from the NOR circuit NOR3 because the output of the NOR circuit NOR2 is maintained at a low level. Accordingly, the output level of the NOR circuit NOR2 is ignored, and the lighting unit 3 can be turned on by the output level from the NOR circuit NOR3 even when the voltage Vb of each storage battery 6 becomes equal to or lower than the first overdischarge voltage V1.

  Next, at sunrise at time T24 in FIG. 13, since the power generation voltage of the solar cell 5 rises at sunrise, the voltage level of the non-inverting input terminal of the comparator CMP3 becomes high, and the output of the comparator CMP3 becomes high level. Thus, one input of the NOR circuit NOR3 becomes high level. For this reason, the output of the NOR circuit NOR3 becomes low level, and the output of the NOR circuit NOR4 becomes high level. Due to the high level of the output of the NOR circuit NOR4, the FET Q2 in FIG. 8 is turned off, and the illumination unit 3 is turned off.

  The counter CNT3 inputs the output of the comparator CMP3 via the knot circuit NOT3, and increments the count value when the output of the knot circuit NOT3 changes from the high level to the low level to count the number of sunrises. To do.

  Thereafter, similarly, at sunset, the illumination unit 3 is turned on, and at sunrise, the illumination unit 3 is turned off and the count value of the counter CNT3 is incremented.

  Then, at the time T25, after the occurrence of the earthquake, for example, when the night of the third day ends and the sunrise occurs, the count value of the counter CNT3 reaches a preset value (for example, 3), and the counter CNT3 The output becomes high level, the A terminal input of the monostable oscillator OSC3 also becomes high level, and one pulse signal is applied from the monostable oscillator OSC3 to the / S terminal of the RS flip-flop FF2. In response to this, the Q terminal output of the RS flip-flop FF2 is switched to a high level.

  Thus, thereafter, the output of the NOR circuit NOR3 is kept at the low level. Accordingly, the output level of the NOR circuit NOR4 changes in response to only the output level from the NOR circuit NOR2, and the operation returns to the normal operation in which no earthquake has occurred.

  Further, in the event of an earthquake, only the power of each storage battery 6 is consumed by lighting of the illumination unit 3, and the amount of power of each storage battery 6 does not increase. For this reason, the voltage Vb of each storage battery 6 is the third overdischarge. When the voltage is lower than V3, the output of the comparator CMP6 becomes high level.

  In this case, since one input of the NOR circuit NOR3 is maintained at a high level, the low level output of the NOR circuit NOR3 and the NOR circuit NOR4 are output regardless of the output level of the comparator CMP3, that is, day and night. The high level output is maintained, the FET Q2 in FIG. 6 remains off, and the illumination unit 3 continues to be turned off. Thereby, the limit is given to the overdischarge state of each storage battery 6, and recharge of each storage battery 6 is attained.

  FIG. 15 is a circuit diagram showing the illuminance circuit 73 of the controller 7a.

  In the illuminance circuit 73, the voltage Vb of each storage battery 6 is divided by the resistors R17 and R18, and the terminal voltage of the resistor R18 is applied to the non-inverting input terminal of the comparator CMP5. Further, by adjusting the variable resistor R19 to which a constant voltage is applied, the voltage level of the inverting input terminal of the comparator CMP5 is set to the resistance R18 when the voltage Vb of each storage battery 6 reaches the second overdischarge voltage V2. The terminal voltage is set to. Therefore, the comparator CMP5 compares the terminal voltage of the resistor R18 with the voltage set by the variable resistor R19, and determines whether or not the voltage Vb of each storage battery 6 has reached the second overdischarge voltage V2. Can do.

  As described above, when an earthquake occurs, the illumination unit 3 is turned on even if the voltage Vb of each storage battery 6 is equal to or lower than the first overdischarge voltage V1. Therefore, the power consumption of the lighting unit 3 also increases, and for this reason, the voltage Vb of each storage battery 6 reaches the third overdischarge voltage V3 in a short period, and continues for the number of days set for lighting of the lighting unit 3. You may not be able to.

  Therefore, when the voltage Vb of each storage battery 6 reaches the second overdischarge voltage V2, the comparator CMP5 applies a high level output to the gate of the FET Q3, switches the FET Q3 off, and turns on the second lamp of the illumination unit 3. The current path of the unit 22 is interrupted and the second lamp unit 22 is turned off.

  Thereby, after the voltage Vb of each storage battery 6 falls to the 2nd overdischarge voltage V2, the power consumption of the illumination part 3 can be saved, the illumination period of the illuminating device 1 can be lengthened, and the power failure by a large earthquake Even if it lasts for about 2 to 3 days, it will be possible to repeat the lighting at night and will not betray people's expectations.

  The illuminance circuit 73 is provided with a timer control circuit 73A. The output of the timer control circuit 73A and the output of the comparator CMP5 are output by wired OR.

  The timer control circuit 73A receives the output of the comparator CMP3 (shown in FIG. 11) indicating whether or not it is sunset. When this output becomes low level, the time elapsed from the sunset time T31 shown in FIG. The time is counted, and during the period from time T31 to time Ta, a high level output is applied to the gate of the FET Q3, the FET Q3 is turned off, and the second lamp unit 22 is turned off. Thereby, the energy-saving mode S1 which suppressed the illumination intensity of the illumination part 3 is set.

  Then, the timer control circuit 73A applies a low-level output to the gate of the FET Q3 in the time zone from the time point Ta to the time point Tb shown in FIG. 5, switches the FET Q3 on, and turns on the second lamp unit 22. As a result, illumination in the standard mode S2 is performed.

  Further, the timer control circuit 73A applies a high-level output to the gate of the FET Q3 in the time period from the time Tb to the time T32 shown in FIG. 5, switches the FET Q3 off, and turns off the second lamp unit 22. Thereby, the standard mode S2 is switched again to the energy saving mode S1.

  The timer control circuit 73A receives the Q terminal output of the RS flip-flop FF2 indicating whether or not an earthquake has occurred, and when the output becomes low in the event of an earthquake, the output of the comparator CMP3 Is at the low level, that is, from sunset to sunrise, the low level output is applied to the gate of the FET Q3, the FET Q3 is switched on, and the second lamp unit 22 is turned on. Thus, the illumination in the standard mode S2 is performed from sunset to sunrise when the earthquake occurs.

  In addition, this invention is not limited to the said embodiment, It can deform | transform variously. For example, when an earthquake occurs, the discharge state of each storage battery 6 may be detected, and the illuminance of the illumination unit 3 may be adjusted according to the discharge state. Thereby, coexistence with the raise of the illumination intensity of the illumination part 3 and suppression of the overdischarge state of each storage battery 6 can be aimed at.

  Further, the first and second lamps 21 and 22 of the illumination unit 3 are both turned on to set the standard mode S2, or only the first lamp 21 is turned on and the second lamp 22 is turned off to save the energy saving mode S1. Alternatively, the modes may be switched and set by adjusting the duty ratio of the pulse voltage supplied from the DC-DC converter 7b to the illumination unit 3.

  Moreover, you may change suitably the number and arrangement | positioning of each LED lamp, and the number and arrangement | positioning of each LED of an LED lamp. Moreover, you may employ | adopt the structure which can change the illumination direction of the illumination part 3 suitably, or can be adjusted. Moreover, you may make the color of the irradiation light of the illumination part 3 mutually differ.

  Furthermore, as the illumination unit 3, other types of light sources may be employed instead of the LED lamps. For example, a fluorescent lamp may be adopted as the light source. In this case, the illuminance of the fluorescent lamp may be increased by using an inverter to turn on the fluorescent lamp and changing the frequency of the AC voltage applied to the fluorescent lamp by the inverter.

It is a perspective view which shows Embodiment 1 of the illuminating device of this invention. It is a side view which shows the LED lamp of an illumination part. It is sectional drawing which shows a solar cell, a support frame, a shaft, etc. It is a block diagram which shows a solar cell, a storage battery, a control part, a DC-DC converter, and an earthquake sensor schematically. It is a timing chart which shows the lighting process of the illumination part in the normal time, and the control process of illumination intensity. It is a timing chart which shows the lighting process of the illumination part and the control process of illumination intensity at the time of the occurrence of an earthquake. It is a figure which shows the level of the full charge voltage of a storage battery, 1st overdischarge voltage, 2nd overdischarge voltage, and 3rd overdischarge voltage. It is a circuit diagram which shows a control part, a DC-DC converter, and its periphery roughly. It is a circuit diagram which shows the charging circuit of a control part. It is a timing chart which shows each signal in a charging circuit. It is a circuit diagram which shows the lighting / extinguishing circuit of a control part. It is a timing chart which shows each signal at the normal time in a lighting / extinguishing circuit. It is a timing chart which shows each signal in the case of an emergency in the lighting / light-out circuit. It is a timing chart which shows each signal in a DC-DC converter. It is a circuit diagram which shows the illumination intensity circuit of a control part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Illuminating device 2 Support | pillar 3 Illumination part 5 Solar cell 6 Storage battery 7 Charging / discharging unit 7a Control part 7b DC-DC converter 8 Earthquake sensor 11 Base plate 12 Reinforcement plate 21 1st lamp unit 22 2nd lamp unit 71 Charging circuit 72 Lighting / extinguishing circuit 73 Illuminance circuit

Claims (8)

In an illuminating device comprising: an illuminating unit; a storage battery that supplies power to the illuminating unit; a solar cell that supplies charging power to the storage battery; and a control unit that controls power supply from the storage battery to the illuminating unit.
The control unit includes a determination unit that determines sunset, and when sunset is determined by the determination unit, the illumination unit is turned on by controlling power supply from the storage battery to the illumination unit. The illuminating device is characterized in that the illuminance of the illuminating unit is adjusted according to the elapsed time from the sunset.   The lighting device according to claim 1, wherein the control unit sets the illuminance of the illumination unit to one of normal illuminance and low illuminance lower than the normal illuminance according to an elapsed time from sunset. .   The control unit sets the illuminance of the illumination unit to low illuminance until the elapsed time from sunset reaches a certain time, and thereafter switches the illuminance of the illumination unit from low illuminance to normal illuminance. The lighting device according to claim 2, wherein   The control unit switches the illuminance of the illuminating unit from low illuminance to normal illuminance and then switches the illuminance of the illuminating unit from normal illuminance to low illuminance again after another fixed time has elapsed. The lighting device according to claim 3.   The lighting device according to claim 1, wherein the determination unit determines sunset based on an output of the solar cell. Equipped with an earthquake sensor to detect earthquakes,
2. The illumination according to claim 1, wherein when the earthquake is detected by the earthquake sensor, the controller continues to maintain the illuminance of the illumination unit at a normal illuminance regardless of the elapsed time from sunset. apparatus. The determination means determines sunrise,
The control unit ends the state in which the illuminance of the illuminating unit is maintained at the normal illuminance regardless of the elapsed time from sunset at the timing when sunrise is detected by the determination unit. The lighting device according to claim 6. The illumination device according to claim 1, wherein the light source of the illumination unit is an LED lamp.

Images