JPH0362401A - Lighting equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a lighting device such as a street light for illuminating a sidewalk.

(Prior art) In this type of lighting equipment such as street lights, it is necessary to expand the light distribution in the direction of road traffic, but in particular, street lights for pedestrians installed on sidewalks etc. Since it is installed at a low height, it is difficult to spread the light distribution in the direction of traffic.
Conventionally, lamps have been used that have transparent envelopes containing light-emitting parts that are relatively easy to control. However, when such a lamp is used, the lamp is viewed directly by pedestrians and the like, causing a problem of glare.

In addition, as lighting equipment that can solve the problem of glare, for example, Japanese Utility Model Publication No. 54-42152 or Japanese Utility Model Publication No. 48-113
As described in Publication No. 282, a light bulb-shaped lamp is used, and the structure is such that the side surface opposite to the opposite slope of the reflector of the envelope of the light bulb is a transparent part and the opposite side is a reflective surface or a frosted surface. Are known. However, in lighting equipment with this type of structure, the entire lamp is placed inside the reflector, and although it is suitable as a spotlight, it has the problem that it is difficult to spread the light distribution in the direction of traffic like a street light. Was.

(Problems to be Solved by the Invention) In the above-mentioned conventional lighting equipment using a lamp with a transparent envelope, glare is a problem, and it is also disclosed in Japanese Utility Model Publication No. 54-42152 or Japanese Utility Model Application Publication No. 48-113282. The lighting equipment described in the above has the problem that it is difficult to spread the light distribution in the direction of traffic like street lights, and even if it is installed at a relatively low height, glare is a problem. There is a need for a lighting fixture that can provide a wide and highly uniform light distribution in the direction of traffic without causing any problems.

The present invention was developed in view of the above problems, and in order to illuminate the pedestrian traffic direction as uniformly as possible, the light distribution is wide, the light source does not cause any glare, and the light source is installed at a relatively low height. This product provides lighting equipment suitable for street lights, etc.

[Structure of the invention]

(Means for Solving the Problems) A lighting fixture of the present invention includes a lamp having a substantially elongated translucent envelope containing a light emitting part, and an irradiation opening disposed optically opposite to the lamp. and a substantially elongated reflector having a substantially elongated shape, and the envelope of the lamp is located on or near a line segment connecting both widthwise edges of the reflector, and has a substantially elongated shape with this line segment. The envelope is divided into two parts parallel to each other and substantially parallel to the sleeve in the longitudinal direction of the envelope, and the side facing the reflective surface of the reflector is formed as a transparent part, and the opposite side is formed as a diffused light-transmitting part. It is something to do.

(Function) In the lighting fixture of the present invention, a part of the light emitted from the light emitting part of the lamp is diffusely transmitted through the diffuser-transmitting surface of the envelope, and the light directed toward the transparent part of the envelope is transmitted through the reflector. The light is reflected by the reflective surface of the reflector and exits from the irradiation aperture of the reflector. The light that is reflected by the reflective surface of this reflector and emitted is emitted when the envelope of the lamp is located on or near a line segment that connects both edges of the reflector in the width direction. Since the transparent part is divided into two parts substantially parallel to the longitudinal axis of the envelope and opposed to the reflective surface of the reflector, a wide area extending in a direction orthogonal to the longitudinal direction of the lamp is formed. light is obtained,
In addition, since the side opposite to the transparent part is a diffused light-transmitting part, there is no problem of glare even if it is installed at a relatively low height position.

(Embodiment) The configuration of an embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG.

Reference numeral 1 denotes a substantially elongated device main body whose upper surface has a convex cross-sectional shape in the width direction, and a lamp socket 3 is provided at the base end side of an opening 2 formed on the lower surface. Also, this device body 1
A substantially elongated reflector 5 with an irradiation opening 4 facing the lower opening 2 is disposed therein, and both side edges 6 in the width direction of the irradiation opening 4 are connected to the lower opening 2 of the instrument body 1. It is located almost on the same plane. The cross section of the reflector 5 in the width direction has a curved surface portion 7 having a concave arc shape at the center, and curved surface portions 9 that are inclined downward through stepped portions 8 bent upward and approximately vertically on both sides of the curved surface portion 7. are formed respectively.

Further, a lower cover 11 having a transparent cover 10 facing the irradiation opening 4 of the reflector 5 is provided on the lower surface of the instrument main body 1, and the base of the lower cover 11 is attached to the base of the instrument main body 1 so as to be openable and closable. The lower lid 11 is pivoted, and the distal end of the lower lid 11 is removably secured to the distal end of the instrument main body 1 by a clamp tool 12.

Reference numeral 13 designates a lamp such as a high-intensity discharge lamp, which has a substantially elongated translucent envelope 15 containing a light-emitting portion 14 made of a filament, and one end of this envelope 15 is connected to the lamp socket 3. A cap part 16 is attached which is detachably attached.

The envelope 15 of the lamp 13 is located below the line segment a connecting the widthwise side edges 6 of the reflector 5, and is approximately parallel to the line segment a. It is divided into two substantially parallel to the longitudinal axis, and the surface facing the reflective surface of the reflector 5 is formed as a transparent portion 17, and the opposite surface is formed as a diffused light-transmitting portion 18 coated with phosphor.

Further, the tip of a support column 20 is attached to the base of the instrument body 1.

Next, the operation of this embodiment will be explained.

When the lamp 13 is turned on, a part of the light emitted from the light emitting section 14 is emitted as diffused light at the diffused light transmitting section 18 of the envelope 15. Further, the light emitted from the transparent portion 17 is reflected by the reflector 5, and this reflected light is emitted from the irradiation aperture of the reflector 5. The light reflected by the reflective surface of the reflector 5 and emitted is emitted when the envelope 15 of the lamp 13 is located in the vicinity of the line segment a connecting the widthwise side edges 6 of the reflector 5. Since the transparent portion 17 is bisected substantially parallel to the line segment a and substantially parallel to the longitudinal axis of the envelope 15, and the surface facing the reflective surface of the reflector 5 is formed in the transparent portion 17, the longitudinal axis of the lamp 13 is It is possible to obtain highly uniform light distribution that spreads in the direction orthogonal to the direction.

In addition, since the side surface opposite to the transparent part 17 is a diffused light-transmitting part 18, the brightness is low and the light reflected by the reflector 5 spreads in a direction orthogonal to the longitudinal direction of the lamp 13. Only the diffused light-transmitting part 18 and reflector 5 of the lamp 13 can be seen, so there is no problem of glare even when installed at a relatively low height, and the light distribution is widened, so the light distribution is in the direction of traffic. expands.

In the configuration of this embodiment, the ratio of the light emitted from the diffused light transmitting portion 18 of the lamp 13 to the light controlled by the reflector 5 is about 60:40.

Next, the configuration of another embodiment will be explained with reference to FIG.

The envelope 15 of the lamp 13 is located on a line segment a connecting the widthwise side edges 6 of the reflector 5, and is approximately parallel to this line segment a and parallel to the longitudinal axis of the envelope 15. It has a configuration in which the reflector 5 is divided into two substantially parallel parts, the side facing the reflective surface of the reflector 5 is formed as a transparent part 17, and the opposite side is formed with a diffused light-transmitting part 18 coated with phosphor.

This configuration also has the same effect as the above embodiment, and the lamp 1
The ratio of the light irradiated from the diffused light transmitting portion 18 of No. 3 and the light controlled by the reflector 5 is approximately 50:50.

Next, the configuration of another embodiment will be explained with reference to FIG.

The envelope 15 of the lamp 13 is located above the line segment a connecting the widthwise side edges 6 of the reflector 5, is approximately parallel to the line segment a, and is parallel to the longitudinal axis of the envelope 15. The reflector 5 is divided into two substantially parallel to each other, with a transparent portion 17 formed on the side facing the reflective surface of the reflector 5, and a diffused light-transmitting portion 18 coated with phosphor on the opposite side.

This configuration also has the same effect as the above embodiment, and the lamp 1
The ratio of the light irradiated from the diffused light transmitting portion 18 of No. 3 and the light controlled by the reflector 5 is approximately 40:60.

〔Effect of the invention〕

According to the present invention, the envelope of the lamp is located on or near a line segment connecting both side edges in the width direction of the reflector, and is substantially parallel to this line segment and extends along the longitudinal direction of the envelope. The transparent part is bisected approximately parallel to the axis of direction, and the transparent part faces the reflective surface of the reflector, and the opposite side is made into a diffused light-transmitting part, so that the light emitted from the light emitting part of the lamp is diffused into the envelope. The light that diffuses and passes through the transparent surface has low brightness, and the light that goes toward the transparent part of the envelope is reflected by the reflective surface of the reflector and is emitted with a light distribution that spreads in a direction perpendicular to the longitudinal direction of the lamp. When used as a street light, it can provide uniform illumination in the direction of traffic, and pedestrians can only see the diffused light-transmitting part and reflector of the lamp, which has low brightness, and it can be installed at a relatively low height. It does not cause any glare even when the light is on.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of a lighting fixture showing an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a perspective view of the same, FIG. 4 is a perspective view of the lamp, and FIGS. FIG. 6 is a longitudinal sectional front view of a lighting fixture showing other different embodiments of the present invention. 5...Reflector, 13...Lamp, 15...Envelope, 17
...Transparent part, 18... Diffuse transparent part. ”□Re-shoot

Claims (1)

[Claims] (1) A lamp having a substantially elongated light-transmitting envelope containing a light emitting part, and a substantially elongated reflector having an irradiation aperture and disposed optically opposite to the lamp, The envelope of the lamp is located on or near a line connecting both widthwise edges of the reflector, is substantially parallel to this line, and is aligned with the longitudinal axis of the envelope. A lighting device characterized in that the reflector is divided into two substantially parallel parts, the side facing the reflective surface of the reflector is formed as a transparent part, and the opposite side is formed as a diffused light-transmitting part.