JPH11134913A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of a luminaire and reduce its irradiation irregularity. SOLUTION: For a bulb part 21 covering an emitting part 22 of a light source L, its tip side is formed into a limiting part 24 that diffusively transmits light and its base side is formed into a transparent part 25 that is transparent. For a reflecting body 31, its side opposite to the limiting part 24 is formed into a mirror face-like direct reflecting part 36 and its side opposite to the transparent part 25 is formed into a limiting reflecting part 35 that diffuses and reflects light. The light passing through the limiting part 24 of the bulb part 21 improves efficiency by being transmitted directly from an irradiating opening 32 or by being reflected by the direct reflecting part 36. The light passing through the transparent part 25 of the bulb 21 suppresses irradiation irregularity by being diffusively reflected by the limiting reflecting 35 and additionally by being reflected by time reflecting body 31 multiple times.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device provided with a reflector.

[0002]

2. Description of the Related Art Conventionally, for example, as described in Japanese Patent Application Laid-Open No. Sho 56-45511, an incandescent light bulb as a light source and a reflecting mirror containing the light source are provided for a downlight of a house or a store. Lighting fixtures are known. And, for incandescent light bulbs, if the light emitted from the filament, which is the light emitting portion, is directly illuminated on the object to be illuminated, the illuminating effect is reduced due to, for example, generation of a strong luminescent spot,
The base is made of a transparent glass, and the tip is made of a semi-transparent or reflecting mirror. On the other hand, this type of reflector generally reflects the light from the light emitting part and directs it from the irradiation aperture toward the object to be illuminated in order to improve the efficiency as much as possible, considering the size of the fixture. Is designed to reach

[0003]

However, in the above-mentioned conventional configuration, the light directly radiated from the filament through the transparent portion of the glass sphere is radiated to the illuminated object after being reflected once by the reflecting mirror. In this case, unevenness of light and strong bright spots are liable to occur, which makes it difficult to improve the lighting effect.

[0004] The present invention has been made in view of such a point, and it is an object of the present invention to provide a lighting device with high efficiency and less irradiation unevenness.

[0005]

According to a first aspect of the present invention, there is provided a lighting device, comprising: a light emitting portion; a transparent portion that covers the light emitting portion; the light transmitting portion mainly transmits light from the light emitting portion; A light source provided with a bulb portion provided with a restricting portion for restricting; a reflecting portion including the light source; the reflecting portion diffusely reflects light at a position opposed to the light emitting portion via the transparent portion; A reflector provided with a limiting reflector.

In this configuration, with respect to the light emitted from the light emitting portion of the light source, the light directed toward the limiting portion of the bulb portion is diffused or reflected at the limiting portion and then reflected directly or at the reflecting portion. Irradiates the object to be illuminated. On the other hand, the light heading for the transparent portion of the bulb portion passes through the transparent portion regularly, is diffusely reflected by the limited reflection portion of the reflector, and is then radiated to the illuminated object directly or reflected by the reflection portion. As described above, since the light emitted from the light emitting portion of the light source passes or is reflected at least through the limiting portion of the bulb portion or the limiting reflection portion of the reflector, uneven irradiation is suppressed, and the illumination effect is improved.

According to a second aspect of the present invention, there is provided the lighting apparatus according to the first aspect, except that the reflection part has a limited reflection part.
A direct reflection unit for performing specular reflection is provided.

In this configuration, the light and the like that have passed through the restricting portion of the bulb portion are specularly reflected by the direct reflecting portion of the reflecting portion, so that the efficiency is improved.

According to a third aspect of the present invention, there is provided a lighting device, comprising: a light emitting portion; a transparent portion which covers the light emitting portion, mainly transmits light from the light emitting portion in a regular manner; and a restricting portion which limits regular transmission of light from the light emitting portion. A light source provided with a bulb portion; and a reflection portion including the light source, the reflection portion being located at a position opposed to the light emitting portion via the transparent portion, and limiting reflection of light toward the reflection portion. And a reflector having a portion.

In this configuration, with respect to the light emitted from the light emitting portion of the light source, the light directed to the limiting portion of the bulb portion is diffused or reflected at the limiting portion and then reflected directly or at the reflecting portion. Irradiates the object to be illuminated. On the other hand, the light heading for the transparent part of the bulb part is specularly transmitted through this transparent part, reflected by the limiting reflection part of the reflector toward the other part of the reflection part, and further reflected by this reflection part. The object to be illuminated is irradiated. As described above, light that is directly emitted from the light emitting part of the light source through the transmitting part of the bulb part is reflected a plurality of times by the reflecting part of the reflector, so that uneven irradiation is suppressed and the illumination effect is improved. I do.

According to a fourth aspect of the present invention, there is provided the lighting device according to the third aspect, except that the reflection portion has a limited reflection portion.
A direct reflection portion for reflecting light toward the irradiation aperture is provided.

In this configuration, light that has passed through the restricting portion of the bulb portion is reflected by the direct reflecting portion of the reflecting portion toward the irradiation opening, so that the efficiency is improved.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a lighting device according to an embodiment of the present invention.

FIG. 1 is a sectional view showing an embodiment of a lighting fixture, FIG. 2 is a perspective view of the lighting fixture, FIG. 3 is a plan view of the lighting fixture, and FIG. FIG. 4 is a partial cross-sectional view showing the embodiment.

1 to 3, reference numeral 1 denotes a lighting fixture, which constitutes a downlight for a house, a store or the like. The lighting fixture 1 includes a fixture main body 2 embedded and installed in a ceiling as an installation target. The fixture main body 2 has a cylindrical side plate 4 and a ceiling covering the upper portion of the side plate 4. The plate part 5 is integrally formed with a metal plate and painted white. The lower end of the instrument body 2 is open, and the periphery of the opening is a flange portion 7 bent outward. Then, a decorative outer frame 8 formed of a metal plate and formed in a white annular shape is attached so as to cover the flange portion 7 from below. A cylindrical portion 8a disposed on the inner peripheral side of the side plate portion 4 is formed on the inner peripheral side of the outer frame 8, and the inner peripheral edge of the outer frame 8 is in contact with the reflector. A unit 8b is provided. On the other hand, a pair of mounting grooves 4a is formed on the side surface of the side plate portion 4, and a stainless steel mounting bracket 11 is attached to each of the mounting grooves 4a so as to be vertically movable.
A terminal block 12 is attached to the lower surface of the top plate 5. And it is located on a part of the upper side of this terminal block 12,
A rectangular through-hole 14 is formed in the top plate 5 so that an electric wire can be connected to the terminal block 12. In addition, this through hole 14
If necessary, dustproof cover 15 made of silicon rubber, etc.
It is covered with. Further, a lamp socket 18 made of porcelain is attached to the lower surface of the top plate 5 via a socket bracket 16. The lamp socket 18 is electrically connected to the terminal block 12 and is disposed so as to be inclined substantially toward the center of the instrument body 2.

The lamp socket 18 has a light source L
Is installed. The light source L is a so-called mini krypton lamp, which is an incandescent light bulb. A krypton gas is sealed inside a bulb portion 21 made of glass, and a light emitting portion 22 as a filament is arranged.
Further, a predetermined range on the distal end side of the bulb portion 21 is partially painted or frosted such as white so as to diffuse and transmit light, and a limiting portion 24 which is a diffusion transmitting portion is formed. The portion on the side of the base that is not used is a transparent clear transparent portion 25 that transmits light specularly.

Further, a reflector 31 which is a reflector is disposed inside the instrument main body 2. And this reflector 31
Consists of, for example, a 0.9 mm thick aluminum plate,
It is formed in a substantially bowl shape including the light source L and having an irradiation opening 32 formed on the lower surface. On the inner surface of the reflector 31, a reflector 33 for reflecting light rays is formed.
Is formed in such a manner that a limiting reflection portion 35 and a direct reflection portion 36 having different shapes and surface treatments are successively formed vertically.

The direct reflection section 36 is formed at a position closer to the irradiation opening 32 than the height position facing the light emitting section 22 via the restricting section 24, and has a curved surface such as a paraboloid of revolution, and has a specular reflection. (Specular reflection). Therefore, the light radiated through the restriction part 24 is reflected by the direct reflection part 36 and is radiated downward from the radiation opening 32.

Further, the limiting reflection portion 35 is a portion higher than the height position facing the light emitting portion 22 via the limiting portion 24, that is,
Formed in a portion located on the transparent portion 25 side from a straight line connecting the filament of the light source L, the whitened portion of the bulb portion 21 and the transparent portion 25, that is, a portion mainly facing the light emitting portion 22 via the transparent portion 25. The surface is surface-treated or processed as a diffuse reflection surface that reflects light in multiple directions by a plain surface, a hammer, or the like. Then, the light emitted through the transparent portion 25 is diffusely reflected by the limiting reflection portion 35, and the reflection center is reflected toward another portion of the reflection portion 33.
Therefore, this light is further reflected by another portion of the reflection section 33 and is radiated downward from the irradiation aperture 32.

A flange 38 is formed around the irradiation opening 32 at the lower end of the reflector 31.
Abuts on the reflector contact portion 8b of the outer frame 8. Further, the reflector 31 has an insertion port 40 through which the light source L or the lamp socket 18 is inserted.

According to the present embodiment, the light emitted from the light emitting portion 22 of the light source L is transmitted directly through the transparent portion 25 of the bulb portion 21, that is, directly emitted from the filament, which tends to cause uneven irradiation. The light is diffusely reflected by the limiting reflection portion 35 of the reflector 31 and is reflected by the light emitting portion 22 a plurality of times, that is, two or more times, and then is irradiated from the irradiation opening 32. Can be prevented from being concentrated on the surface, uneven irradiation can be suppressed, and the illumination effect can be improved.

The light transmitted through the restricting portion 24 of the bulb portion 21 is diffused or reflected by the restricting portion 24 and is then directly radiated from the irradiation opening 32 or is mainly reflected by the mirror-like direct reflecting portion 36. Since the light is reflected and irradiated from the irradiation opening 32, the loss in the instrument body 2 due to unnecessary diffusion can be suppressed, and the efficiency can be improved.

As described above, by performing multiple reflection or diffuse reflection within a limited range, a downlight with high efficiency and less irradiation unevenness can be provided.

In the above embodiment, the limiting reflection section 35 of the reflector 31 performs the diffuse reflection and sets the reflection direction so that the light goes to the other reflection section 33. Irrespective of one of the setting of the directions, it is possible to suppress the irradiation unevenness.

Further, the type and shape of the light source L, the reflection portion 33
The shape, material, etc. can also be appropriately selected, for example,
As shown in FIG. 4, the light source L may be a vertically supported halogen lamp, and the restricting portion 24 may be a reflecting surface.

[0026]

According to the lighting apparatus of the first aspect, with respect to the light emitted from the light emitting portion of the light source, the light directed to the limiting portion of the bulb portion is diffused or reflected by the limiting portion, The light directed toward the transparent part of the bulb part is directly transmitted through the transparent part and diffused and reflected by the limiting reflection part of the reflector, and then directly reflected by the illuminated object directly or after being reflected by the reflection part. Alternatively, the light emitted from the light-emitting part of the light source is reflected by the reflecting part and illuminated on the object to be illuminated. Can be suppressed and the lighting effect can be improved.

According to the lighting apparatus of the second aspect, in addition to the effects of the first aspect, the reflecting section is provided with the exception of the limiting reflecting section.
Since the direct reflection unit that performs specular reflection is provided, light or the like that has passed through the restriction unit of the bulb unit is specularly reflected by the direct reflection unit of the reflection unit, so that unnecessary diffusion can be suppressed and efficiency can be improved.

According to the third aspect of the present invention, with respect to the light emitted from the light emitting portion of the light source, the light directed to the limiting portion of the bulb portion is diffused or reflected by the limiting portion and then directly or directly. While the light is reflected on the reflector and illuminated on the object to be illuminated, the light directed toward the transparent part of the bulb is transmitted through the transparent part, and directed toward the other part of the reflective part at the limiting reflector of the reflector. After being reflected and further reflected by the reflecting portion, the light illuminated on the object to be illuminated and transmitted directly from the light emitting portion of the light source through the transmitting portion of the bulb portion is reflected by a plurality of reflecting portions of the reflector. Since the light is reflected twice, uneven irradiation can be suppressed and the illumination effect can be improved.

According to the illuminating device of the fourth aspect, the reflecting portion is provided with a direct reflecting portion for reflecting light toward the irradiation opening except for the limiting reflecting portion, and the light or the like passing through the limiting portion of the bulb portion. Is reflected toward the irradiation aperture by the direct reflection part of the reflection part, so that unnecessary diffusion can be suppressed and the efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a lighting fixture of the present invention.

FIG. 2 is a perspective view of the lighting device.

FIG. 3 is a plan view of the lighting device.

FIG. 4 is a partial cross-sectional view showing another embodiment of the lighting fixture of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lighting equipment 21 Bulb part 22 Light emitting part 24 Restriction part 25 Transparent part 31 Reflector 32 Irradiation opening 33 Reflection part 35 Restriction reflection part 36 Direct reflection part L Light source

Claims (4)

[Claims] 1. A light-emitting unit, comprising: a light-emitting unit; a transparent unit that mainly transmits light from the light-emitting unit in a regular transmission direction; and a valve unit provided with a restriction unit that restricts regular transmission of light from the light-emitting unit. A light source; and a reflector provided with a reflector including the light source, the reflector having a limiting reflector for diffusing and reflecting light at a position facing the light emitter via the transparent part. Lighting equipment characterized by the above-mentioned. 2. The lighting apparatus according to claim 1, wherein the reflection unit is provided with a direct reflection unit for performing specular reflection except for the limited reflection unit. 3. A light-emitting unit, comprising: a transparent unit that covers the light-emitting unit, mainly transmits light from the light-emitting unit, and a valve unit that includes a restricting unit that restricts regular transmission of light from the light-emitting unit. A light source; and a reflector including a reflector that includes the light source, the reflector having a limiting reflector that reflects light toward the reflector at a position facing the light emitter via the transparent unit. A lighting fixture characterized by comprising: 4. The lighting device according to claim 3, wherein the reflection unit is provided with a direct reflection unit that reflects light toward the irradiation opening, excluding the limiting reflection unit.