JP2013131299A - Lamp fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp fitting capable of effectively utilizing emission light of light-emitting elements for illumination.SOLUTION: In a road lamp 1 provided with a globe 50 having a cup shape with a curved surface swollen from a lamp fitting body 10 toward an irradiation face side formed of translucent hard glass, LED modules 24 each equipped with LEDs are arranged inside the globe 50 swollen from the lamp fitting body 10, in stead of being housed in the lamp fitting body 10, and arranged along the curved surface of the globe 50 so that a distance of each LED module 24 to the facing globe 50 is nearly in the constant vicinity.

Description

  The present invention relates to a lamp provided with a light source such as an LED as a light source.

  With increasing output of LEDs, various lighting fixtures using LEDs as light sources have been proposed. In addition, lighting fixtures such as road lights and street lights have been proposed in which LEDs are provided as light sources in place of discharge lamps such as mercury lamps and high-pressure sodium lamps (for example, Patent Document 1 and Patent Document 2). reference). In addition, a technique has been proposed in which an existing lamp is converted to an LED at low cost by attaching an LED light source unit to an existing lamp using a discharge lamp as a light source (see, for example, Patent Document 3).

JP 2011-108610 A JP 2010-262796 A JP 2011-216334 A

  By the way, some lamps for outdoor lighting such as road lights and street lights are provided with a curved globe that bulges in an irradiation opening of the lamp body. When the light source of such a lamp is an LED, there is a problem that if the LED is disposed in the lamp body, a part of the emitted light of the LED is shielded by the lamp body.

  This invention is made | formed in view of the situation mentioned above, and it aims at providing the lamp which can utilize effectively the emitted light of a light emitting element for illumination.

  In order to achieve the above object, the present invention provides a lamp provided with a curved globe that bulges in the lamp body, wherein a plurality of light emitting elements are arranged in the globe along the curved surface of the globe. Features.

  Further, the present invention provides a light distribution for each light emitting element of the reflecting mirror provided to control the light distribution for each of the light emitting elements or the light distribution for each of the light emitting elements as a narrow angle light distribution in the lamp. The optical axis of each light distribution is arranged so as to be substantially perpendicular to the globe.

  According to the present invention, in the lamp described above, a plurality of light emitting element modules formed by arranging the light emitting elements are arranged along the curved surface of the globe.

  Further, the present invention provides an assembly in which in the lamp, a plurality of the light emitting element modules and a power supply device that supplies lighting power to each of the light emitting element modules are assembled, and are detachably fixed in the lamp body. It is provided with.

  According to the present invention, in the lamp provided with the curved globe that bulges in the lamp body, a plurality of light emitting elements are arranged in the globe along the curved surface of the globe. It can be used effectively for lighting without being blocked by the lamp body.

It is a figure which shows the structure of the road light which concerns on embodiment of this invention, (A) is a side view, (B) is a bottom view. It is a figure which shows the internal structure of a road light, (A) is the schematic block diagram which looked at the internal structure through the front frame, (B) is the schematic block diagram which looked at the internal structure in the state which removed the front frame. It is a perspective view which shows the structure of a built-in unit. It is a 3rd page figure which shows the structure of a built-in unit, (A) is a side view, (B) is a top view, (C) is a rear view. It is a top view which shows the structure of a reflector. It is a figure which shows the light distribution of the concave reflective surface provided in the reflector, (A) shows typically the light distribution of the AA cross section of FIG. 5, (B) is the BB cross section of FIG. A light distribution is typically shown.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, a road lamp, which is an example of an outdoor lamp, is exemplified as the lamp, but the present invention is not limited to this.

FIG. 1 is a diagram showing a configuration of a road light 1 according to the present embodiment, in which FIG. 1 (A) is a side view and FIG. 1 (B) is a bottom view.
As shown in FIG. 1, the road lamp 1 includes a lamp main body 10 supported by a column 2. The support column 2 is a pole-like member standing on the side of the road, and a front end portion 2A bent in an L shape is inserted into a rear end portion 10A of the lamp body 10 and fastened with a bolt 3A and a screw 3B. Yes.
The lamp body 10 has a box shape with an open front surface (downward in FIG. 1A) extending from the rear end portion 10A to the front end portion 10B. A front frame 12 covering the open surface is connected to the lamp body 10 by a hinge 14 at the tip end portion 10B so that the lamp body 10 can be opened and closed, and the interior of the lamp body 10 can be accessed by opening the front frame 12. The lamp body 10 and the front frame 12 are manufactured by aluminum die casting using an aluminum alloy as a material.
A built-in unit 20 is built in the lamp body 10.

2A and 2B are diagrams showing an internal configuration of the road light 1. FIG. 2A is a schematic configuration diagram showing the internal configuration through the front frame 12, and FIG. 2B is an internal view with the front frame 12 removed. It is the schematic block diagram which looked at the structure. FIG. 3 is a perspective view showing the configuration of the built-in unit 20. FIG. 4 is a three-side view showing the configuration of the built-in unit 20, FIG. 4 (A) is a side view, FIG. 4 (B) is a plan view, and FIG. 4 (C) is a rear view.
As shown in FIG. 2B, the built-in unit 20 includes a plurality of LED modules 24, a power supply device 26, a terminal block 28, a power retainer 30, an automatic flasher socket 32, and an assembly frame body 34. It has.

  The LED module 24 constitutes a light emitting part of the road light 1 and includes an LED substrate 38 having a substantially rectangular shape in plan view and a reflector 39 fixed so as to cover substantially the entire surface of the LED substrate 38. . The LED board 38 is a board on which the LEDs 40 are mounted. In the present embodiment, six LEDs 40 are mounted in a 2 × 3 grid pattern. The reflector 39 controls the light distribution of the radiated light of the LED 40, and a concave reflecting surface 41 is provided at a position corresponding to the LED 40.

FIG. 5 is a plan view of the reflector 39.
As shown in the figure, each of the concave reflecting surfaces 41 has an opening 41A formed on the bottom surface facing the LED substrate 38, and the LED 40 is disposed in the opening 41A. The light distribution of the concave reflection surface 41 and the direction of the optical axis are the same.
6 is a diagram showing the light distribution of the concave reflecting surface 41, FIG. 6 (A) schematically shows the light distribution of the AA cross section of FIG. 5, and FIG. 6 (B) is the BB diagram of FIG. A light distribution of a section is typically shown.
As shown in the figure, the light distribution of the concave reflecting surface 41 has an optical axis K perpendicular to the LED mounting surface 38A of the LED substrate 38, and the light extends along the optical axis K in a rod shape having a substantially constant width. It has a so-called narrow angle light distribution in which the spread of light in the direction intersecting the optical axis K is limited. That is, in the LED module 24, light is radiated in a rod shape perpendicular to the LED substrate 38 from each of the concave reflection surfaces 41 arranged in a lattice pattern.

The power supply device 26 converts external power (for example, commercial power) supplied from the outside of the road lamp 1 into LED drive power and supplies it to each LED module 24, and is housed in a power supply case 26A having a substantially rectangular shape. ing. The terminal block 28 is connected to an external power lead-in line (not shown), and electrically connects the lead-in line to the power supply device 26 to supply external power. The power retainer 32 is a member that is pressed against the assembly frame body 34 so as to cover the lead-in line. The lead-in wire is drawn into the lamp body 10 through the column 2 and the like, and is connected to the terminal block 28 and is pressed and fixed midway by the power source presser 32.
The automatic flasher socket 32 is a connector to which an automatic flasher 36 (see FIG. 1) for controlling the lighting of the LED module 24 according to the ambient brightness is mounted.

The assembly frame body 34 is a metal in which the plurality of LED modules 24, the power supply device 26, the terminal block 28, the power retainer 30, and the automatic flasher socket 32 are assembled so that the built-in unit 20 can be handled integrally. This is a frame body. The assembly frame body 34 has a flat base plate 35 (FIG. 3) having a size that can be accommodated in the lamp body 10 by opening the front frame 12, and the base plate 35 is installed in the lamp body 10 with bolts or the like. It is fixed removably with.
The lamp body 10 of the present embodiment uses a lamp body 10 of an existing road lamp 1 on a road in which a light source such as a discharge lamp or an incandescent lamp, a reflector surrounding the light source, a socket to which the light source is mounted, and the like are housed. It has been. That is, the existing lamp body 10 is removed from the roadside column 2 and lowered to the ground, the front frame 12 is opened, and the built-in light source is removed from the lamp body 10. Then, after the built-in unit 20 is fixed by screwing and the front frame 12 is closed, the built-in unit 20 is attached to the support column 2, and the lead-in wire is connected to the terminal block 28, whereby the light source of the road lamp 1 is replaced with the LED 40.

  The configuration of the built-in unit 20 will be described in detail. As shown in FIG. 2B, a power supply device 26, a terminal block 28, a power retainer 30, and an automatic power unit 26 are provided in a rear space 44A on the rear end 10A side of the lamp body 10. Each of the flasher sockets 32 is disposed, and each of the LED modules 24 is assembled to the assembly frame body 34 so that the plurality of LED modules 24 are disposed in the front space 44B on the tip portion 10B side. The rear space 44A is a space where members other than the light source and the reflector, such as a socket and a terminal block, in which the light source is mounted when a socket-type light source such as a discharge lamp or a heat lamp is used as the light source, The front space 44B is a space where the light source and the reflector are arranged.

  In the rear space 44A, as shown in FIG. 2 (B), the power supply case 26A of the power supply device 26 is disposed close to either the left or right side surface 11 of the lamp body 10 and substantially parallel to the side surface 11, Between the side surface 11 on the opposite side and the power supply case 26A, a terminal block 28 other than the power supply device 26, a power retainer 30, and an automatic flasher socket 32 are arranged to save space and balance the weight in the left-right direction. It is planned.

  In the front space 44B, as shown in FIG. 2B, a plurality of pairs (three pairs in the illustrated example) of left and right LED modules 24 are arranged from the rear end portion 10A to the front end portion 10B. 24 constitutes a light source unit 46. The light source unit 46 is arranged at the arrangement position of the discharge lamp and the reflector when a discharge lamp or the like is used as a light source. As shown in FIG. 2A, the front frame 12 covering the light source unit 46 has a substantially elliptical irradiation opening 48 in a plane facing the light source unit 46.

  For example, a globe 50 is attached to the irradiation opening 48 as shown in FIG. The globe 50 has a cup shape having a curved surface that bulges from the lamp body 10 (front frame 12) to the irradiation surface side (downward in FIG. 1), and is made of translucent hard glass. On the surface of the globe 50, a plurality of streak prisms 50A (see FIG. 1B) extending from the rear end portion 10A to the front end portion 10B are integrally formed. The streak-like prism 50A suppresses unevenness in illuminance that occurs when a light source such as a discharge lamp is used as the light source by spreading light from the light source in a direction perpendicular to the direction in which the streaks extend.

In the road lamp 1 having such a globe 50, when the LED 40 is arranged in the lamp body 10, a part of the emitted light of the LED 40 is shielded by the front frame 12 of the lamp body 10 and the utilization rate is limited. Illumination rate gets worse. Further, if the emitted light of the LED 40 is incident on the globe 50 obliquely with a large incident angle, the reflection angle at the incident surface increases, so the direction of light emission also changes, and invalid illumination light increases, resulting in a poor illumination rate. Become.
Therefore, in the present embodiment, as shown in FIG. 1A, the LED module 24 including the LEDs 40 is not housed in the lamp body 10 but is disposed in the globe 50 bulged from the lamp body 10. Yes. That is, as shown in FIG. 2A and FIG. 3, the built-in unit 20 is provided with a support plate 52 that is erected substantially perpendicular to the base plate 35 and supports the LED module 24 at the tip portion for each LED module 24. ing. These support plates 52 have such a length that the LED module 24 is disposed in the vicinity of the inner surface of the globe 50, whereby each of the LED modules 24 is disposed at a position protruding from the interior of the lamp body 10 into the globe 50. Is done. Thereby, the emitted light from each LED 40 is not shielded by the front frame 12, the side surface 11 of the lamp body 10, or the like, and the light of the LED 40 is effectively used.

  Further, each of the LED modules 24 is disposed along the curved surface of the globe 50 so that the distance to the facing globe 50 is substantially constant as shown in FIG. The direction is changed so that the optical axis K (FIG. 6) of the concave reflecting surface 41 is substantially perpendicular to the globe 50 to be rotated (so that the upper surface of the LED module 24 is substantially perpendicular to the normal of the curved surface of the globe 50). Are arranged. Specifically, as shown in FIG. 1A, in the direction from the rear end 10A of the lamp body 10 to the front end 10B, the inclination angle of each LED module 24 with respect to the vertical downward direction in accordance with the curved surface of the globe 50. Is changed so that the optical axis K of the concave reflecting surface 41 is substantially perpendicular to the facing globe 50. Further, as shown in FIGS. 2A and 2B, in the left-right direction of the lamp body 10 (in the direction perpendicular to the direction from the rear end portion 10A to the front end portion 10B), a pair of LED modules 24 are arranged. By disposing in a mountain shape (in the shape of a cross-section C along the left-right direction), the concave reflective surface 41 is arranged in a cross-sectional view fan shape in accordance with the curved surface of the globe 50 in the left-right direction.

  Since each of the concave reflecting surfaces 41 has a light distribution extending in a rod shape along the optical axis K as shown in FIG. 6, the light of the concave reflecting surface 41 with respect to the facing globe 50 as described above. By disposing the axis K so as to be substantially vertical, most of the emitted light of the LED 40 is directly incident on the globe 50, and reflection at the time of entering the globe 50 is suppressed. In addition, since each LED module 24 is disposed close to the inner surface of the globe 50, the utilization factor of the light emitted from each concave reflection surface 41 is increased, and the illumination rate is improved.

  Further, as described above, since the streak prism 50A is provided on the surface of the globe 50, the light transmitted through the globe 50 is in the left-right direction (the direction connecting the rear end portion 10A and the front end portion 10B of the lamp body 10). (Direction perpendicular to the direction). Thereby, the light radiated | emitted from each concave reflective surface 41 is mixed, and the illumination intensity nonuniformity in an irradiation surface is suppressed.

  As shown in FIG. 3, each of the support plates 52 that support the LED module 24 is integrally provided with a mounting plate 56 on which the LED module 24 is mounted, and the LED is mounted on the mounting plate 56. The module 24 is fixed. Each mounting plate 56 is formed so that the optical axis K of the concave reflecting surface 41 of the LED module 24 is substantially perpendicular to the curved surface of the globe 50 facing each other. Therefore, the light of each LED 40 is arranged so as to be directly incident on the globe 50 only by mounting and fixing the LED module 24 on the mounting plate 56. As shown in FIG. 3, each of the support plates 52 is fixed by screwing a bent piece 53 whose base end side is bent in an L shape onto the surface of the base plate 35. That is, in the surface of the base plate 35, a screw hole that also serves as a positioning is provided in advance in the position where the support plate 52 is disposed, and the support plate 52 is screwed in accordance with this screw hole, whereby each support plate is fixed. 52 is placed in an appropriate position.

  As described above, according to the present embodiment, the plurality of LED modules 24 are arranged along the curved surface of the globe 50 in the curved globe 50 bulging from the lamp body 10. Light emitted from the LED module 24 can be efficiently used for illumination without being blocked by the lamp body 10.

In particular, according to the present embodiment, each of the LED modules 24 is arranged so that the optical axis K of each concave reflecting surface 41 is substantially perpendicular to the globe 50, so that the emitted light of the concave reflecting surface 41 is directly incident on the globe 50. Therefore, it is possible to suppress reflections that are invalid for illumination.
In addition to this, the light distribution of each concave reflecting surface 41 extends in a substantially rod shape along the optical axis K, and is a narrow-angle light distribution that suppresses the spread in the direction of tolerance to the optical axis K. Light can be directly incident on the globe 50. At this time, the globe 50 is provided with a plurality of streak-like prisms 50A extending from the rear end portion 10A of the lamp body 10 toward the front end portion 10B. Irradiance unevenness on the irradiated surface is suppressed because the individual radiated lights are mixed with each other by being expanded in a direction orthogonal to the direction from the portion 10A to the tip portion 10B.

  Moreover, according to this embodiment, since the LED module 24 formed by arranging a plurality of LEDs 40 is arranged along the curved surface of the globe 50, the plurality of LEDs 40 can be easily arranged together.

Further, according to the present embodiment, the plurality of LED modules 24 and the power supply device 26 that supplies the lighting power to each of the LED modules 24 are assembled, and the assembled frame body 34 that is detachably fixed in the lamp body 10. It was set as the structure provided with.
Accordingly, the light source can be easily replaced with the LED 40 simply by attaching the assembly frame body 34 in the lamp body 10 to the existing road lamp 1 using a discharge lamp or an incandescent lamp as a light source.

The above-described embodiment is merely an example of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.
For example, in the above-described embodiment, the plurality of LEDs 40 are arranged in a grid pattern. However, the present invention is not limited to this, and the LEDs 40 may be arranged in a staggered pattern or irregularly.
Moreover, although LED40 was illustrated as an example of a light emitting element, not only this but arbitrary elements, such as organic EL, can be used if it is a light emitting element from which sufficient intensity | strength of light is obtained.
In the present embodiment, the LED module 24 including the reflector 39 that controls the light distribution of the LED 40 is illustrated. However, the present invention is not limited thereto, and a lens or the like for controlling the light distribution is provided for each LED 40, and the LED 40 alone is distributed. Light may be controlled.

1 Road lights (lamps)
DESCRIPTION OF SYMBOLS 10 Lamp main body 10A Rear end part 10B Front end part 11 Side surface 12 Front frame 20 Built-in unit 24 LED module (light emitting element module)
26 Power supply device 26A Power supply case 28 Terminal block 34 Assembly frame body (assembly body)
35 Base plate 38 LED board 38A LED mounting surface 39 Reflector 40 LED (light emitting element)
41 concave reflection surface 46 light source 48 irradiation aperture 50 globe 50A streak prism 52 support plate 56 mounting plate K optical axis

Claims (4)

In a lamp provided with a curved globe that bulges in the lamp body,
A lamp characterized in that a plurality of light emitting elements are arranged in the globe along the curved surface of the globe.   Each light distribution of the light emitting elements or a light distribution for each of the light emitting elements of the reflector provided to control the light distribution for each of the light emitting elements is a narrow angle light distribution, and the optical axis of each light distribution is The lamp according to claim 1, wherein the lamp is arranged so as to be substantially perpendicular to the globe.   The lamp according to claim 1 or 2, wherein a plurality of light emitting element modules formed by arranging the light emitting elements are arranged along a curved surface of the globe.   A plurality of the light emitting element modules and a power supply device that supplies lighting power to each of the light emitting element modules are assembled, and an assembly that is detachably fixed in the lamp body is provided. Item 4. A lamp according to any one of Items 1 to 3.

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