JP3173965U - Lighting device - Google Patents

Abstract

Provided is an illumination device using an LED as a light source, which can be easily replaced with a light source such as a mercury lamp used in a lighting fixture having a spherical shape or a cubic shape. SOLUTION: A plurality of light emitting units 13 including a substrate on which a plurality of LEDs are arranged and a lens arranged on the substrate so as to cover the LEDs are provided, and a screw cap 15 is provided with the plurality of light emitting units. In the illuminating device enclosed in the cover 25, a plurality of the light emitting units are formed as a polygonal ring having the screw base as the center, thereby emitting light toward the periphery around the screw base. It is possible to do.
[Selection] Figure 2

Description

  The present invention relates to an illuminating device used as a street light, a crime prevention light, a garden light or the like mainly on a road, a park or the like outdoors.

2. Description of the Related Art Conventionally, in street lamps and the like, there are luminaires having globes such as a spherical shape and a cubic shape, which are preferred and used frequently because of their simple design.
And since the lighting fixture provided with such a glove does not have the part which controls the light radiated | emitted from a light source, it radiates | emits illumination light in a fairly wide range including the sky.
However, radiation of illumination light to the sky may be a problem as obstacle light, and a lighting fixture that does not emit light in a direction other than a predetermined direction is desired. In particular, the emission of illumination light to the sky tends to be suppressed.

In general, mercury lamps and the like are used as light emitting parts used for such street lamps, but recently, efforts have been made to reduce power consumption and maintenance and management. For the purpose, LEDs (light emitting diodes) are used as light sources. Many street lamps using LEDs control the light distribution and emit light in a predetermined direction.

Several inventions have been disclosed for street lamps using LEDs as light emitting parts. For example, in Patent Document 1, “in a white light emitting diode illuminating device configured by arranging a plurality of white light emitting diodes, a plurality of planar printed circuit boards to which a plurality of white light emitting diodes are attached, A white light-emitting diode outdoor lighting fixture that is arranged in a polygonal shape so as to be oriented and oriented in multiple directions is disclosed.

However, such a lighting fixture described in Patent Document 1 is an invention as a lighting fixture that attempts to widen the lighting range of a street lamp. In updating a street lamp using a conventional mercury lamp or the like, All the lighting fixtures attached to the upper part had to be replaced, and there was a problem that the installation cost would increase.

JP 2004-200102 A

In view of these points, the present invention provides an illuminating device using an LED as a light source, which can be easily replaced with a light source such as a mercury lamp that is used in a luminaire equipped with a globe having a spherical shape or a cubic shape. .

In order to solve the above problems, the present invention has the following configuration. A plurality of light emitting units each including a substrate on which a plurality of LEDs are disposed and a lens disposed on the substrate so as to cover the LEDs are included, and the plurality of light emitting units are included in a cover having a screw cap. In the lighting device, the plurality of light emitting units are formed as a polygonal ring having the screw base as a center, so that light can be emitted toward the periphery around the screw base.

    The illuminating device according to the present invention can be easily replaced with a light source such as a mercury lamp used in a luminaire equipped with a globe such as a spherical shape or a cubic shape, and is controlled to emit light in a predetermined direction. A lighting device can be provided.

It is a figure which shows the street lamp provided with the conventional spherical globe. In the illuminating device which concerns on Embodiment 1, (a) is a side view of an illuminating device, (b) is an upper surface perspective view of an illuminating device. It is a light emission unit with which the illuminating device which concerns on Embodiment 1 is equipped, (a) is a front view of a light emission unit, (b) is a side view of a light emission unit. It is an expanded sectional view of the lens with which the illuminating device of this invention is equipped. It is a light distribution tracking figure of the lens with which the illuminating device of this invention is equipped. It is the figure which used the illuminating device concerning Embodiment 1 for the street lamp provided with the conventional spherical globe. It is the figure which used the illuminating device which concerns on Embodiment 2 for the street lamp provided with the conventional cube-shaped glove.

Hereinafter, embodiments of the present invention will be described in detail. However, it should be noted that the drawings are schematic and dimensional ratios and the like are different from actual ones. Therefore, specific dimensional ratios and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.
The following embodiments are exemplifications for embodying the technical idea of the present invention, and the embodiments of the present invention are described below in terms of the material, shape, structure, arrangement, etc. of the components. It is not something specific. The embodiments of the present invention can be implemented with various modifications without departing from the scope of the invention.

2A and 2B are diagrams illustrating the lighting device 10 according to the first embodiment of the present invention, in which FIG. 2A is a side view of the lighting device 10, and FIG. 2B is a top perspective view of the lighting device 10. 3 is a light-emitting unit 13 provided in the lighting apparatus according to the first embodiment. FIG. 3A is a front view of the light-emitting unit 13, and FIG. 3B is a side view of the light-emitting unit 13. FIG. 4 is an enlarged view of the lens 11a portion provided in the light emitting unit 13 of FIG. 3A (enlarged sectional view in the AA direction of FIG. 3A). FIG. 5 is a light distribution tracking diagram of the lens 11a provided in the illumination device 10 of the present invention. FIG. 6 is a diagram in which the lighting device 10 according to the first embodiment is used for a street lamp provided with a spherical globe.

(Embodiment 1)
As shown in FIG. 2, the lighting device 10 is arranged in a ring shape so that the plurality of light emitting units 13 emit light to the side surface of the lighting device 10. In the present embodiment, the four light emitting units 13 are arranged in a square shape when viewed from above. Further, the side surface including the light emitting unit 13 includes a cover 25 having translucency, and a screw cap 15 is provided at one end of the cover 25 in the longitudinal direction.

(Light emitting unit)
As shown in FIG. 3B, the light emitting unit 13 includes a lens unit 11 having a plurality of LEDs 16 arranged on the mounting substrate 12 and having lenses 11 a corresponding to the plurality of LEDs 16. The lens unit 11 is fixed to the mounting substrate 12 with screws 14 so that the lens portion 11 a covers the LED 16.

(lens)
When the lighting device 10 is attached to a street light having a spherical globe as shown in FIG. 1, it is intended to suppress emission to the sky and to emit more light toward the ground. The light distribution is controlled so that the light emitted from the LED 16 is emitted in a predetermined direction by the lens 11a. Therefore, the lens 11a has the following characteristics.

4 is an enlarged view of the lens portion 11a of the light emitting unit 13 in FIG. 3A (enlarged cross-sectional view in the AA direction in FIG. 3A). The lens 11a is formed of transparent glass, plastic, translucent resin, or the like.
The lens 11a has a first incident surface 17 and a second incident surface 18 as an incident part 19 for incident light emitted from the LED 16, and totally reflects the light incident from the first incident surface 17. The reflecting portion 23 and the emitting portion 22 that emits these lights are formed.
In FIG. 4, the lens 11a is controlled to emit light emitted from the LED 16 mainly in an obliquely downward direction (arrow B direction).
Therefore, the second incident surface 18 has a convex curved surface shape that slightly swells toward the LED 16 side so that more light emitted from the LED 16 can be collected more easily. Then, a part of the emission part with respect to the second incident surface 18 has a convex curved shape that bulges outward.
In addition, the first incident surface 17 is formed to be slightly inclined toward the LED 16 side in order to guide the light from the LED 16 to the reflecting portion 23.

As shown in FIG. 5, the light of the LED 16 incident on the first incident surface 17 is refracted by the first incident surface 17 and guided to the reflecting portion 23 formed in a substantially arc shape. Then, the light reflected by the reflecting portion 23 is guided to the emitting portion 22 and is mainly emitted from the flat portion 20 of the emitting portion 22 to the outside. On the other hand, the light of the LED 16 incident on the second incident surface 18 is refracted by the second incident surface 18 and condensed in the width direction, and this light is guided to the emission part 22, and is mainly emitted from the emission part 22. Among these, the light directed from the convex curved surface portion 21 is emitted to the outside.

  Conventional lighting fixtures having a spherical shape such as a spherical shape or a cubic shape are often provided with a screw cap on the ground side in the globe, and when the lighting device 10 is attached without using the lens 11a, Although light is emitted in the horizontal direction, the lens 11a can efficiently emit light from the LED 16 toward the ground. Further, when light from the LED is to be emitted in the ground direction without using the lens 11a, the light of the LED 16 is emitted in the ground direction by, for example, tilting the mounting substrate 12 on which the LED 16 is mounted toward the ground. However, in this case, as compared with the case where the mounting substrate 12 is arranged perpendicular to the ground, there is a disadvantage that the width of the illumination device 10 itself must be increased by the inclination width of the mounting substrate 12. This is because if the width of the illumination device 10 is not smaller than the opening width of the globe, the globe cannot be covered even if it is attached to the column. As described above, the lens 11a allows the illumination device 10 to be sized in accordance with the opening width of the globe, and as shown in FIG. 6, it is possible to efficiently emit the light emitted from the LED 16 toward the ground. .

(Embodiment 2)
FIG. 7 is a diagram in which the lighting device 10 according to the second embodiment of the present invention is used in a street lamp having a conventional cubic globe. The illumination device 10 according to the second embodiment is different from the illumination device according to the first embodiment in FIG. 2A in that the lens unit 11 is turned upside down and provided on the substrate 11 or the light emitting unit 13 itself is moved up and down. On the contrary, it is prepared. In other words, the illumination device 10 is provided so that the direction of the lens 11a shown in FIG.
That is, in the illuminating device 10 of the first embodiment, the light emitted from the LED 16 is controlled to be emitted in the direction of the screw cap 15 by the lens 11a. However, in the illuminating device 10 of the second embodiment, the emitted light from the LED 16 is a lens. 11a is controlled to radiate in the direction opposite to the screw cap 15. By doing in this way, as shown in FIG. 7, also in the conventional street light etc. which mount with the screw cap 15 facing up, it becomes possible to radiate | emit the emitted light from LED16 to the ground direction efficiently. .

DESCRIPTION OF SYMBOLS 10 Illuminating device 11 Lens unit 11a Lens 12 Mounting board 13 Light emitting unit 14 Screw 15 Screw cap 16 LED 17 1st incident surface 18 2nd incident surface 19 Incident part 20 Flat part 21 Convex surface part 22 Output part 23 Reflecting part 25 Cover 30 Globe 31 Mercury lamp 35 Direction of light

Claims (7)

A plurality of light emitting units each including a substrate on which a plurality of LEDs are disposed and a lens disposed on the substrate so as to cover the LEDs are included, and the plurality of light emitting units are included in a cover having a screw cap. In the lighting device, a plurality of the light emitting units are formed as a polygonal ring centered on the screw base, so that light can be emitted toward the periphery centering on the screw base. . The lighting device according to claim 1, wherein the polygonal ring is a quadrangle. The illumination device according to claim 1, wherein light emitted from the LEDs is light-distributed in the direction of the screw cap by a lens disposed on the substrate. 3. The illumination device according to claim 1, wherein light emitted from the LED is light-distributed in a direction opposite to the screw cap by a lens disposed on the substrate. A lamp comprising the lighting device according to claim 3, wherein the lamp is mounted such that a screw cap of the lighting device is on a lower side. It is a lamp provided with the illuminating device of Claim 4, Comprising: The lamp | ramp with which the screwed cap of the said illuminating device was equipped on the upper side was equipped. The lamp according to claim 5, wherein the lamp includes a substantially spherical or cubic globe.

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