JPH09265807A - Led light source, led signal lamp, and traffic signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve maintenance easiness such as light source exchange work at a high place, make compatible with the conventional incandescent bulb signal lamp, and improve fixture efficiency with better visibility by using a light emitting diode having a long service life. SOLUTION: An LED signal lamp 1 is provided with an LED light source 3 in a cup-shaped reflection mirror 2. The light source 3 permits plural circuit boards 5 to be arranged at a polygonal cylinder axially of the mirror 2. Plural LEDs 6 are closely mounted on the outer face of these boards 5. All the LEDs 6 are light-emitted in blue, yellow, or red. A cylindrical support cylinder 7 is secured eccentricity at the right end of the polygonal cylinder of the board 5. The penetration bole of a convergent diameter and 2d of the mirror 2 is closely penetrated and protruded outward at the right end of the cylinder 7 and is secured at this penetration part by adhesive such as cement. At the outer end of the cylinder 7, for example, a metal base 8 with its constitution identical to that of the metal base of the conventional incandescent bulb signal light is concentrically secured. The metal base 8 protrudes electric electric terminals 8b and 8c on the outer circumference face of the entire metal base 8a to be inserted into a power supply socket and forms an eyelet 8d.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic light for road traffic, an LED signal lamp for the traffic light, and an LED light source.

[0002]

2. Description of the Related Art Conventionally, as a signal lamp of this kind, an incandescent lamp is built in a bowl-shaped reflecting mirror, and a translucent cover that closes the projection opening end of the reflecting mirror is colored blue, yellow, or red. It has been known.

However, in this type of signal lamp, the life of the incandescent lamp is short, and since the signal lamp is generally installed in a high place, there is a problem that maintenance for replacing the incandescent lamp is not always easy.

Therefore, in the display lamp described in Japanese Utility Model Laid-Open No. 6-43917 and the signal lamp described in Japanese Utility Model Laid-Open No. 6-77107, a long-life light emitting diode (hereinafter referred to as LED) is used as a light source. There is something.

[0005]

However, these publications do not disclose that the caps of the display lamp and the signal lamp are configured to be compatible with the caps of the conventional incandescent lamp type signal lamps. However, these display lamps and the like cannot simply be applied to the signal lights of road traffic signals.

Further, since these publications do not describe that the front lens that closes the projection end of the reflecting mirror is made colorless, it is possible to eliminate the pseudo lighting phenomenon due to the reflection of the front lens such as the sun. This is not possible and the visibility is not always good.

Further, since the LED has a good straightness of light, only a part of the light emitted from the LED reflected by the reflecting mirror can be effectively used when the focal point of the reflecting mirror is single. There is a problem that instrument efficiency is low.

Therefore, an object of the present invention is to improve the easiness of maintenance such as light source replacement work at a high place by using a long-lifetime LED as a light source, and also to improve the conventional incandescent lamp type signal lamp. It is to provide an LED light source, an LED signal light, and a traffic signal that are compatible with, have good visibility, and have high instrument efficiency.

[0009]

According to a first aspect of the present invention, there is provided a bowl-shaped reflecting mirror having at least a reduced-diameter end inner surface as a reflecting surface; A light emitting diode arranged; a lighting circuit board disposed on the light emitting opening end side of the reflecting mirror to drive each light emitting diode; a base electrically connected to the lighting circuit board; It is characterized by having.

According to the present invention, a plurality of light emitting diodes (LEDs) are arranged on the side of the reduced diameter inside the bowl-shaped reflecting mirror, while the lighting circuit board is arranged on the side of the light emitting end rather than the LEDs. Therefore, the reduced-diameter end side reflecting surface can be effectively used for reflection of light from the LED, and the efficiency of the device can be improved.

Also, since the light source is a long-life LED,
It is possible to reduce the number of times of exchanging the LEDs that have reached the end of their life, and it is possible to reduce the maintenance work for exchanging LEDs at high places.

According to a second aspect of the present invention, the reflecting mirror has reflecting surfaces for each block so that when the plurality of light emitting diodes are divided into a plurality of blocks, the light from the light emitting diodes of each block is individually reflected. It is characterized in that it is formed for each.

According to the present invention, since the reflecting surface of the reflecting mirror for reflecting the light from the LED can be effectively utilized for each block of the LED, the efficiency of the device can be further increased and the brightness can be increased. The visibility can be improved.

According to a third aspect of the present invention, the mouthpiece has a mouthpiece body that is inserted in and out of the electricity supply socket; A pair of electric terminals that are detachably locked in the groove and electrically connected; and an electric terminal that is formed at the tip of the base body and that is electrically connected to the power supply socket. It is characterized by

According to the present invention, since the base is constructed in the same manner as the base of the conventional incandescent lamp type signal lamp, the LED light source according to the present invention can be easily replaced by the incandescent lamp type signal lamp. The range of application of this LED light source can be expanded.

According to a fourth aspect of the present invention, the LED light source according to any one of the first to third aspects, in which all the light emitting diodes emit light in any of blue, yellow and red; and a lighting circuit board in a reflecting mirror of the LED light source. A plurality of light-emitting diodes arranged on the light-projecting side; and a colorless transparent cover that closes the light-projecting opening end of the reflecting mirror.

According to this claim, as the light source of the signal lamp,
Uses a long-life LED, so LE is exhausted
The number of times D is replaced can be reduced. Therefore, it is possible to reduce maintenance such as replacement of signal lights which are generally installed in high places.

Further, since the light-transmissive cover of the reflecting mirror is colorless, the western light is transmitted to this light-transmissive cover with little reflection. Further, even if reflected, the reflected light does not become colored light. Therefore, pseudo lighting due to reflection can be prevented and the visibility can be improved.

The invention of claim 5 comprises a plurality of signal lights according to claim 4, which emit at least blue, yellow, and red respectively; a fixture main body for fixing each of these signal lights; a pole for supporting the fixture main body; It is characterized by doing.

According to the present invention, a traffic light can be constituted by a plurality of signal lights each emitting light of blue, yellow and red. Further, since this traffic light is equipped with the signal light according to the fourth aspect, it is possible to obtain substantially the same operational effect as this signal light.

The invention of claim 6 is characterized by comprising a control device for controlling the turning on and off of each signal lamp.

According to the present invention, since the traffic light according to claim 5 is provided, it is possible to obtain substantially the same operational effect as this traffic light.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 5, the same or corresponding parts are designated by the same reference numerals.

FIG. 1 shows an LE according to the first embodiment of the present invention.
It is a partially cutaway front view of the D signal light, and in the figure, LED
In the signal lamp 1, an LED (light emitting diode) light source 3 is concentrically provided in a bowl-shaped reflecting mirror 2.

The reflecting mirror 2 has a bowl-shaped body 2a made of glass or the like, and has an inner surface formed into a parabolic shape. Aluminum is vapor-deposited on the inner surface of the parabolic shape to form a reflection surface 2b. There is.
The reflecting mirror 2 may be configured as a dichroic mirror that reflects visible light and transmits infrared light by forming the reflecting surface 2b with a multilayer interference film. Reflecting mirror 2
A colorless and transparent front glass 4 is fitted to the light projecting opening end 2c.

The LED light source 3 is, as shown in FIG.
A plurality of plate-like circuit boards 5 elongated in the axial direction are arranged in a polygonal cylinder such as a hexagonal cylinder, and adjacent end portions of the respective circuit boards 5 are fixed to each other. A plurality of LEDs 6 are densely mounted on the outer surface of each of these circuit boards 5, and
The ED 6 is opposed to the reflecting surface 2b at the bowl-shaped reduced-diameter end in the reflecting mirror 2. All LEDs 6 emit light in any of blue, yellow, and red.

At the right end of the hexagonal cylinder of the circuit board 5 in FIG. 1, a cylindrical support cylinder 7 is fixed concentrically. The right end of the support tube 7 in the drawing closely penetrates the through hole of the reduced-diameter end 2d of the reflecting mirror 2 and projects outward, and is fixed at this penetrating portion by an adhesive such as cement (not shown).

A base 8 having the same structure as the base of a conventional incandescent lamp type signal lamp is concentrically fixed to the outer end of the support cylinder 7.

The base 8 is a pair of electric terminals 8b, 8c projecting outward in the diametrical direction on the outer peripheral surface of the body of the base body 8a which is inserted into and out of a power supply socket (not shown).
While projecting, eyelet 8d is attached to the tip of base body 8a.
Is formed.

That is, when the base 8 is inserted into a power supply socket (not shown), the base 8 is fitted by being rotated by about 90 ° around the axis, and the pair of electric terminals 8 is attached.
b, 8c and the eyelet 8d are electrically connected to the inner surface of the power supply socket to supply power.

A plurality of lighting circuit boards 9 are provided at the left end of the hexagonal cylinder of the circuit board 5 in FIG. 1, that is, at the tip closer to the light projecting opening end 2c of the reflector 2 than the LED 6 installation location in the reflector 2. It has a hexagonal cylindrical shape and is fixed concentrically.

That is, each lighting circuit board 9 is a hexagonal cylinder formed by laminating a rectangular board on which an LED lighting circuit is formed, and forming a pair of electric terminals 8b and 8c of the base 8.
Is electrically connected to each inner surface of the eyelet 8d through a lead wire (not shown), and is electrically connected to each circuit board 5, and rectifies commercial alternating current supplied from the base 8 into direct current, Each LED 6 is turned on or off.

As shown in FIG. 2, a disc-shaped circuit board 10 is concentrically fixed to one end of the inner and outer double lighting circuit boards 9 on the side of the light projecting opening 2c. This board 10 is an LED arranged in a ring around the central axis of the hexagonal cylinder of the circuit board 5.
It is formed in a disk having a diameter slightly smaller than a virtual inscribed circle that is almost inscribed at the tip of 6.

A plurality of LEDs 11 for direct irradiation are densely mounted on the disc-shaped circuit board 10 as shown in FIG. 3, and these LEDs 11 are also electrically connected to the lighting circuit board 9.

As shown in FIG. 1, a plurality of LEDs 6 on the side of the reduced diameter end of the reflecting mirror 2 are provided along the axial direction of the reflecting mirror 2 with a plurality of annular blocks (areas) having a predetermined width, for example, 4 blocks. And the reflecting surface 2b of the reflecting mirror 2 so as to individually reflect the light from the LEDs 6 of each annular block.
Are formed in a plurality of stages 2b1, 2b2, 2b3, 2b4. The reflecting surfaces 2b1 to 2b4 of each step are focused on the LED 6
The light from almost the center of each annular block is matched.

Since the signal lamp 1 is constructed as described above, after the base 8 of the signal lamp 1 is pushed into a power supply socket for a conventional incandescent light bulb type signal lamp (not shown), for example, about 90 ° around the axis. By rotating, it can be fitted so as to be able to receive power freely. That is, the base 8 of the signal light 1
Is compatible with conventional bases for incandescent signal lights.

Since the plurality of LEDs 6 are opposed to the reflecting surface 2 on the side of the reduced diameter end in the reflecting mirror 2, this reflecting mirror 2
a can be effectively used for reflecting the light from each LED 6, and the efficiency of the device can be improved.

Moreover, since the reflecting surface 2b forms a plurality of steps 2b1 to 2b4 for each annular block of the LED 6,
Even if each LED 6 is excellent in straightness of light, each reflecting surface 2b1 to 2b4 can be effectively used for each annular block of the LED 6, and the efficiency of the device can be further improved and the visibility can be improved. .

Further, an LED for direct irradiation is provided in front of the LED light source 3.
Since 11 is provided, the brightness of the central portion of the front glass 4 can be increased, the brightness uniformity of almost the entire front glass 4 can be increased, and the visibility can be improved.

Since a transparent and colorless glass is used as the front glass 4, even when a western sun is incident on the front glass 4, most of the western sun is transmitted through the front glass 4 and is not reflected. , It is possible to prevent pseudo lighting due to reflection. Further, even if reflected, the reflected light does not become colored light. Therefore, the visibility can be further improved.

Further, since each LED 6, 11 has a long life, it is possible to reduce the number of times of replacement of the LEDs 6, 11 which have reached the end of their life, and to reduce the maintenance for the replacement. Moreover, since the signal lamp 1 is often installed in a high place, the effect of reducing maintenance for replacing the LEDs 6 and 11 at a high place is great.

FIG. 4 is a front view of an LED signal lamp 1A according to a second embodiment of the present invention. The signal lamp 1A is a reflecting mirror 2A.
Is characterized in that it is formed into an elliptical shape, and is substantially the same as the above-described first embodiment except for this, so that it is possible to obtain substantially the same operational effect.

FIG. 5 is a partially cutaway front view of a traffic light 21 for road according to a third embodiment of the present invention. This traffic light 21 is one of the LED signal lights 1 and 1A which emits light in blue, yellow and red, respectively. One of them, for example, 1 is installed side by side on the instrument body 22, and the instrument body 22 is fixed to the pole 25 by the supporting arm 23 and the supporting wire 24, and the pole 25 is erected on the ground.

The pole 25 is provided with a control device 26 for controlling the turning on, off, blinking, etc. of each signal lamp 11.

According to this traffic signal 21, since the above-mentioned LED signal lamp 1 is provided, it is possible to reduce maintenance for replacing the LEDs 6 and 11 at a high place, and at the same time, the brightness of each signal lamp 1 and its brightness. Since it is possible to increase the evenness and prevent the pseudo lighting phenomenon due to the reflection of the sun, it is possible to improve the visibility.

[0046]

As described above, according to the invention of claim 1 of the present application, a plurality of light emitting diodes (LEDs) are arranged on the reduced diameter end side in a bowl-shaped reflecting mirror, and a lighting circuit board is provided. LE
Since it is arranged closer to the light emitting end side than D, the reduced-diameter end side reflecting surface can be effectively used for reflection of light from the LED, and the efficiency of the device can be improved.

Since the light source is a long-life LED,
It is possible to reduce the number of times of exchanging the LEDs that have reached the end of their life, and it is possible to reduce the maintenance work for exchanging LEDs at high places.

According to the second aspect of the present invention, the reflecting surface of the reflecting mirror that reflects the light from the LED can be effectively utilized for each block of the LED, so that the efficiency of the device is further increased and the brightness is increased. It is possible to increase the visibility and improve the visibility.

According to the invention of claim 3, since the base is constructed in the same manner as the base of the conventional incandescent lamp type signal lamp, the LED light source according to the present invention can be easily replaced with the incandescent lamp type signal lamp. Therefore, the range of application of this LED light source can be expanded.

According to the fourth aspect of the present invention, since the LED having a long life is used as the light source of the signal light, the number of times of exchanging the LED whose life is exhausted can be reduced. Therefore, it is possible to reduce maintenance such as replacement of signal lights which are generally installed in high places.

Further, since the light-transmissive cover of the reflecting mirror is colorless, the western light is transmitted to this light-transmissive cover with almost no reflection. Further, even if reflected, the reflected light does not become colored light. Therefore, pseudo lighting due to reflection can be prevented and the visibility can be improved.

According to the fifth aspect of the invention, the traffic light can be constituted by a plurality of signal lights each emitting light of blue, yellow and red. Further, since this traffic light is equipped with the signal light according to the fourth aspect, it is possible to obtain substantially the same operational effect as this signal light.

According to the sixth aspect of the invention, since the traffic light according to the fifth aspect is provided, it is possible to obtain substantially the same operational effect as this traffic light.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a signal lamp according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a view on arrow III in FIG.

FIG. 4 is a partially cutaway front view of a signal light according to a second embodiment of the present invention.

FIG. 5 is a partially cutaway front view of a traffic signal for road traffic according to a third embodiment of the present invention.

[Explanation of symbols]

 1, 1A Signal lamp 2, 2A Reflector 2a Reflector body 2b Reflective surface 2b1 First reflective surface 2b2 Second reflective surface 2b3 Third reflective surface 2b4 Fourth reflective surface 3 LED light source 4 Front glass 5 Circuit board 6 LED 8 Base 8b , 8c A pair of electric terminals of the base 8d Eyelet 9 of the base 9 Lighting circuit board 11 Direct-lighting LED 21 Road traffic signal 22 Instrument main body 25 Pole 26 Control device

Claims (6)

[Claims] 1. A bowl-shaped reflecting mirror having at least a reduced-diameter end inner surface as a reflecting surface; a plurality of light-emitting diodes arranged on the reduced-diameter end side in the reflecting mirror; and light emission in the reflecting mirror. An LED comprising: a lighting circuit board which is arranged closer to the light emitting opening end side than the diode and drives each light emitting diode; and a base which is electrically connected to the lighting circuit board.
light source. 2. The reflecting mirror is formed with a reflecting surface for each block so that when the plurality of light emitting diodes are divided into a plurality of blocks, the light from the light emitting diodes of each block is individually reflected. The LED light source according to claim 1, wherein 3. The base is a base body that is inserted into and removed from the power supply socket; the base body projects radially outward from the outer surface of the body of the base body, and can be engaged with and disengaged from the engagement groove of the power supply socket. A pair of electric terminals that are locked to and electrically connected to each other; and an electric terminal that is formed at the tip of the base body and that is electrically connected to the power supply socket. LED light source. 4. The LE according to claim 1, wherein all the light emitting diodes emit any one of blue, yellow and red.
D light source; a plurality of light emitting diodes disposed on the light emitting side of the lighting circuit board in the reflecting mirror of the LED light source; and a colorless transparent cover that closes the light projecting opening end of the reflecting mirror. An LED signal lamp characterized in that. 5. A plurality of LED signal lights according to claim 4, which emit at least blue, yellow, and red light respectively; a fixture body for fixing each of these signal lights; and a pole for supporting the fixture body. A traffic light that is characterized. 6. A control device for controlling turning on and off of each signal lamp;
The traffic signal according to claim 5, further comprising: