JP2600517Y2 - Sign light - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sign light, and more particularly, to a sign light which emits light at night to make a vehicle driver or the like aware.

[0002]

2. Description of the Related Art Generally, a gate such as a park or a parking lot is provided with a preventive pillar for preventing entry at night. However, if the presence of the preventive pillar is not recognized in some way, an automobile or the like may become a preventive pillar. Collisions may cause an accident. In order to make such recognition, a marker lamp is conventionally provided. For example, a lamp is integrally attached to a part of the prevention pillar, and the presence of the prevention pillar is recognized by lighting a light bulb provided in the lamp. In this case, a light emitting diode (hereinafter, referred to as an LED) may be used instead of a light bulb, and a battery or a commercial power supply is used as a power supply. In such a conventional marker light, when a primary battery is used as a power source, if the light emission luminance is increased to increase the labeling degree, the current consumption increases, the battery life is shortened, and the battery is frequently replaced. There is a need to. In addition, if the light emission luminance is reduced in order to extend the life of the battery, the effect of recognizing the sign is reduced.

On the other hand, when a commercial power supply is used, such a problem does not occur. However, it is necessary to wire between the commercial power supply and the sign lamp so that the power cord is not exposed, so that the equipment becomes complicated and the equipment becomes complicated. Expensive. In particular, when applied to roadway guardrail signs, an extremely large number of sign lights are required, so that the wiring becomes extremely long and the equipment becomes difficult, and the power consumption described above is enormous. Becomes It is also necessary to take safety measures such as earth leakage. Therefore, the present applicant has previously proposed a marker lamp using a solar cell as a power source (Japanese Patent Application No. 5-84020). In this way, by using a solar cell as a power source, light energy of the sun is converted into electric energy in the daytime and stored in a storage battery, and the electric energy stored in the nighttime is used for the LED.
Can be emitted, and the above-mentioned problem can be solved.

[0004]

However, in the sign lamp proposed above, the LE is required to uniformly illuminate the illumination window.
Although a diffusion plate for diffusing the light of D is used, for example, if the diffusion plate is made of a milky white plate material in order to enhance the diffusion effect, the amount of transmitted light is reduced and the brightness of the illumination window is reduced. In order to prevent this, if the diffusion plate is made of a transparent plate material provided with a diffusion step or the like to reduce the diffusion effect, the brightness of the illumination window tends to become uneven, and the original diffusion plate is used. The purpose is impaired and the appearance is reduced. For this purpose, the number of LEDs may be increased while the diffusion plate is made of a milky white plate to enhance the diffusion effect.
Increasing the LEDs increases power consumption,
There is a problem that the lighting time at night may be shortened and the sign lamp becomes expensive. SUMMARY OF THE INVENTION An object of the present invention is to provide a sign lamp capable of illuminating an illumination window uniformly and brightly.

[0005]

According to the present invention, light is emitted from a light emitting portion by electric energy generated by a solar cell.
The light of the light emitting portion is reflected toward the illumination window provided on the casing by a substantially conical reflecting means for reflecting the light in the axial direction and the circumferential direction in a diffused state. Where
The reflecting means has a plurality of conical surfaces having different apex angles in the axial direction.
The arrangement is arranged. Alternatively, the reflection of the reflection means
The surface has a diffusion step portion having a plurality of steps along the axial direction.
It is composed.

[0006]

The light from the light emitting portion can be effectively diffused in the axial direction and the circumferential direction of the casing without using a diffusion plate by providing the reflecting means with a diffusing function, so that the light can be illuminated without increasing the light emission amount of the light emitting portion. It is possible to illuminate the window uniformly and brightly. In particular, the reflecting means is provided with a plurality of conical surfaces having different apex angles.
Are arranged in the axial direction, so that the
The shooting directions are different, and the diffusion effect is enhanced. Also reflection
The conical surface of the means can be expanded by forming a step-shaped diffusion step.
The scattering effect is enhanced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. 1 is a schematic perspective view of a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view thereof, FIG. 3 is a sectional view taken along line AA of FIG. 2, FIG.
FIG. 3 is a partially exploded perspective view of a main part. Here, an example is shown in which a marker light is incorporated in a brace for a vehicle that is always erected at an entrance of a park or the like. In these figures, support 1
Is formed as a hollow cylinder, and the upper part is open. A marker lamp assembly 2 formed in a short cylindrical shape having the same diameter as the column 1 is fitted and attached to the opening. In this marker light assembly 2, a casing is formed by integrally integrating a cylindrical outer frame frame 11 and a light emitting surface frame 12 having a shorter tube length in the axial direction. A plurality of illumination windows 12a are opened on the peripheral surface, and a cylindrical light emitting surface lens 13 is attached to the inner surface thereof. The light emitting surface lens 13 is formed of a colored transparent resin, and its inner surface is subjected to graining.

A ring-shaped outer frame upper body 14 is attached to the upper opening of the outer frame 11, and the rechargeable battery box 15 is inserted into the outer frame 11 using the outer frame upper body 14. The interior is supported. The rechargeable battery box 15 is formed in a box shape having a circular upper portion and a rectangular lower portion having a planar shape, and a solar cell box 16 is supported on the upper portion. The solar cell box 16 is formed in a disk shape, and is supported at its outer periphery by the rechargeable battery box 15.
6a are formed, support the solar cell 17 which generates an electromotive force by sunlight in the concave portion 16a,
A circular upper lens 18 is attached to the upper surface, and the solar cell 17 is held in a sealed state. The solar cell 4 is shown in FIG.
As shown in the cross-sectional structure, the front and back surfaces including the aluminum plate 172 provided on the back surface side of the solar cell 171 are covered with a silicon sheet 173 to prevent water from entering the cell 171. You. In the rectangular lower part of the rechargeable battery box 15, a rechargeable battery 19 charged by the electromotive force of the solar cell 17 and a circuit board constituting a circuit for controlling light emission of an LED as described later 20 are installed.

The lower end of the rechargeable battery box 15 has an LE
A D socket 21 is attached by a screw 22. This LE
The D socket 21 is formed in a rectangular plate shape, and an LED supporting circuit board 26 is attached to an upper surface thereof.
, Four LEDs 23 are arranged and supported in the circumferential direction. These LEDs 23 are connected to the LED socket 21.
The socket 21 protrudes below the socket 21 through four holes 21a. A cylindrical inner lens 24 is fixed to the periphery of the lower surface of the LED socket 21 so as to surround the LED 23, and a lower reflector 25 is fixed to the center of the inner lens 24. The lower reflector 25 has a reflection surface formed by evaporating aluminum on the surface of a material having a substantially conical shape as a whole, and a screw 27 at the center apex of the LED socket 21. Fixed to the center. Here, the reflection surface of the lower reflector 25 has a configuration in which two conical reflection surfaces 251 and 252 having different apex angles are connected with each other at a substantially central position in the height direction.
Further, the inner lens 24 is formed of a transparent resin,
Although not shown, for example, a lens step having a triangular cross section in the horizontal direction is formed over the inner peripheral surface thereof.

[0010] In the marker lamp having this configuration, the rechargeable battery 19 is charged in the daytime by electric energy generated by the electromotive force of the solar cell 17 using sunlight. When the surroundings become dark, such as at night, the electromotive force of the solar cell 17 is reduced, and this is electrically detected by a circuit configured on the circuit board 20.
The electric energy of the rechargeable battery 19 is supplied to the LED 23. As a result, the LED 23 emits light, and the emitted light is reflected in the circumferential direction by the reflecting surfaces 251 and 252 of the lower reflector 25, passes through the inner lens 24, and passes through the light emitting surface lens 13. The light emitted from the illumination window 12a of the light emitting surface frame 12 is illuminated as a sign lamp.

At this time, since the reflecting surface of the lower reflector is composed of two conical reflecting surfaces 251 and 252 having different apical angles, the light emitted by the four LEDs 23 is different at each reflecting surface. Each is reflected at a circumferential angle different from the axial angle. That is, as shown by arrows in FIGS. 2 and 3, since the reflecting surface is conical, the light is reflected while being diffused at an angle of 360 degrees in the circumferential direction.
Further, two conical surfaces 251 and 25 having different apex angles of the reflecting surfaces are provided.
2, the conical surfaces have different reflection angles in the axial direction, and as a result, are reflected in a state of being diffused at a large angle in the axial direction. And this lower reflector 2
5, the diffusion of light is promoted by the lens step on the inner surface of the inner lens 24 and the grain on the inner surface of the light emitting surface lens 13, so that the area of the light emitting surface lens 13 corresponding to the illumination window 12a is uniform. Will be illuminated. Therefore, the illumination window 12a can be uniformly illuminated without using a milky white diffusion plate, and a reduction in the amount of transmitted light due to the diffusion plate is prevented beforehand. Even with a small number of LEDs or LEDs with low light emission luminance, bright illumination is provided in the illumination window. Can be performed. Further, the LED 23 does not look like a dot through the illumination window 12a due to the diffusion effect of the lower reflector 25 and the textures and steps of the lenses 13 and 24, and the appearance is improved.

FIGS. 6 and 7 are a vertical sectional view and a sectional view taken along line BB of a second embodiment of the present invention, in which the configuration of the reflecting surface of the lower reflector in the above embodiment is different. In this embodiment, the reflecting surface of the lower reflector 25A is formed into a single conical shape, and the reflecting surface has a stepped cross section and a concentric diffusion step with respect to the center of the lower reflector. 253 are formed. By forming the diffusion step 253, the light from the LED 23 is reflected while being diffused in the 360-degree circumferential direction on the reflection surface of the lower reflector 25A, and at the same time, is diffused.
3, the light is irregularly reflected in the axial direction, and the illumination window 12a can be uniformly illuminated. In addition,
Depending on the size of the step of the diffusion step portion 253, the reflected light may have a periodicity in the axial direction, and the illumination window 12a may have horizontal stripes of light and darkness to perform special illumination.

Here, FIG. 8 shows the LED of each embodiment described above.
It is a figure showing an example of the circuit which lights 23. In this circuit, the LED 23 is configured to blink for a relatively long period of time and because the luminance is gradually converted. That is, the solar cell 17 and the rechargeable battery 19 are connected by a diode D, and each of the batteries 17, 19 is connected to the CPU 3, and the LED 3 is connected to the CPU 3 via the switching transistor 4. Then, the CPU 3 constantly monitors the electromotive voltage of the solar cell 17 and causes the rechargeable battery 19 to charge when the electromotive voltage of the solar cell 17 is equal to or higher than a predetermined value as in the daytime. In addition, when the electromotive voltage becomes equal to or lower than a predetermined value, such as at night, the switching transistor 4 is turned on to supply the electric energy stored in the rechargeable battery 19 to the LED 23 and control the LED 23 to blink. At this time, C
PU3 supplies a voltage to be supplied to the LED 23 as a pulse waveform. By controlling the pulse width, the LED
23 is controlled to be turned on and off, and periodic blinking is performed.

FIG. 9 shows the timing waveform.
(A) is a pulse waveform of the voltage supplied to the LED. L
The ED is lit at a luminance corresponding to the pulse width. By gradually changing the pulse width, the ED is lit while gradually increasing the LED luminance as shown in FIG. Can be turned off while gradually lowering. In this case, when the pulse width is changed at the same change rate when the LED is turned on and when the LED is turned off as in (a), the light is turned off in a short time by human eyes as shown by the broken line in (b). And the periodicity of lighting and extinguishing may be impaired. For this reason, the rate of change of the pulse width on the light-off side is made small as shown in (c), and the brightness at the time of light-off becomes extremely gentle as shown in (d). As a result, as shown by the dashed line in (d), the human eye looks as if the luminance conversion is performed at the same speed when the light is turned on and when the light is turned off.

FIG. 10 is a diagram showing an example of a circuit in which the above-mentioned LED is periodically blinked by an analog circuit. In this embodiment, the control circuit 5 includes a voltage comparison circuit 51, a timer circuit 52, a pulse wave generation circuit 53, an integration circuit 54, and a reference voltage 55. The voltage comparison circuit 51 uses the electromotive voltage of the solar cell 17 as a reference. When the voltage is equal to or higher than the reference voltage, the rechargeable battery 19 is charged without supplying electric energy to the LED 23 when the voltage is equal to or higher than the reference voltage. Then, when the voltage becomes equal to or lower than the reference voltage, such as at night, the control for supplying the electric energy of the rechargeable battery 19 to the LED 23 is performed. At this time, FIG.
As shown in FIG. 1A, the pulse wave generation circuit 53 generates a rectangular wave having a cycle substantially equal to the blinking cycle of the LED 23 by a signal from the timer circuit 52. Then, this rectangular wave is integrated by the integration circuit 54 to give a gradient between its rise and fall as shown in (b), so that the brightness of the LED 23 is gradually increased as shown in (c). And
Conversely, the light is turned off while the brightness of the LED 23 is gradually reduced. The integrating circuit 54 is composed of resistors R1 and R2 and a capacitor C1. In particular, the resistor R2 connected to the output side changes the waveform of the voltage supplied to the LED to the rising side as shown in FIG. Thus, the gradient can be reduced on the falling side, so that the luminance change between when the light is turned on and when the light is turned off can be seen to the human eyes as shown by the broken line in FIG.

[0016]

As described above, according to the present invention, the electric energy of the solar cell is stored, the light emitting portion is made to emit light, and the light is reflected by the reflecting means having a diffusion function, and the illumination provided on the peripheral surface of the casing. Because it is configured to illuminate windows,
At night, the sign light is turned on using the stored electric energy, and at this time, the light can be diffused in the axial direction and the circumferential direction of the casing by the reflection means, so that the illumination window can be made uniform without using a diffusion plate. The light-emitting portion can be prevented from being seen from the outside of the marker lamp as a dot. Further, since the light transmittance is not reduced by the diffusion plate, the illumination window can be brightly illuminated even if the number of light emitting elements such as LEDs constituting the light emitting section is reduced. Change
And a plurality of conical surfaces with different apical angles in the axial direction.
Reflection direction on each conical surface is different by adopting a lined configuration
And the diffusion effect is enhanced. Also, the conical surface of the reflection means
The diffusion effect is also enhanced by configuring the
Can be

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a first embodiment of the marker light of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a partially exploded perspective view of a main part of the marker light according to the first embodiment.

FIG. 5 is a sectional view of a solar cell.

FIG. 6 is a longitudinal sectional view of a main part of a second embodiment of the present invention.

FIG. 7 is a sectional view taken along the line BB of FIG. 6;

FIG. 8 is a block circuit diagram of an example of an LED blinking circuit according to the present invention.

FIG. 9 is a timing waveform chart in the circuit of FIG. 8;

FIG. 10 is a block circuit diagram of another circuit of the present invention.

11 is a timing waveform chart in the circuit of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 support 2 marker light assembly 11 outer frame 12 light emitting surface frame 13 light emitting surface lens 14 outer frame upper body 15 rechargeable battery box 16 solar battery box 17 solar battery 18 upper lens 19 rechargeable battery 23 LED 24 inner lens 25, 25A lower reflector 251, 252 Reflecting surface 253 Diffusion step

──────────────────────────────────────────────────続 き Continued from the front page (56) References JP-A-4-230901 (JP, A) JP-A-3-173004 (JP, A) JP-A-2-86006 (JP, U) JP-A-4-230 40391 (JP, U) Fully open sho 64-54204 (JP, U) Fully open sho 62-55619 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F21Q 3/00 F21V 7 / 04 G08G 1/09 G08G 1/095

Claims (2)

(57) [Scope of request for utility model registration] 1. A hollow column-shaped casing having an illumination window provided on a peripheral surface thereof, a solar cell disposed on a surface of the casing, and electric energy generated in the solar cell disposed in the casing. A light-emitting unit that emits light, and the light-emitting unit is disposed to face the casing in the axial direction, and reflects light emitted by the light-emitting unit in a diffused state in the axial direction and the circumferential direction toward the illumination window of the casing. A reflecting means having a substantially conical shape , wherein the plurality of reflecting means have different apex angles.
Characterized in that the conical surfaces are arranged in the axial direction . 2. A hollow pillar-shaped casing having an illumination window provided on a peripheral surface thereof.
And the solar cells placed on the surface of this casing
A pond and the solar cell disposed in the casing
A light-emitting unit that emits light by generated electric energy;
The light emitting unit and the casing are axially opposed to each other,
Direct the light emitted by the light emitting unit to the illumination window of the casing
Substantially conical shape that reflects in the diffused state in the axial and circumferential directions
Reflection means, wherein the reflection surface of the reflection means is in the axial direction.
It is configured as a multi-stepped diffusion step along the direction
A sign light characterized by being.