JPH087628A - Luminaire - Google Patents

Abstract

PURPOSE:To improve outward appearance, and restrain an unpleasant feeling from being given to a person by preventing a surface of a reflecting plate from being darkly seen at lights-out time of a luminaire. CONSTITUTION:In a luminaire whose at least front surface opens and which has a reflecting plate 2 having a reflecting surface 2a to reflect light from a lamp 3, a cross section of the reflecting surface 2a of the reflecting plate 2 is formed in an almost stairs shape, and a stairs-shaped step part 2b of the reflecting surface 2a is formed as an irregularly reflecting surface. Since light incident from outside of a luminaire at lights-out time is irregularly reflected and diffused by the step part 2b, a surface of the reflecting plate 2 is not darkly seen, and outward appearance at lights-out time of the luminaire is improved, and an unpleasant feeling is not given.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture having a reflector.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional luminaire. The luminaire comprises a substantially cylindrical instrument body 1 having a downward opening, and a reflector 2 housed in the instrument body 1. , And a lamp 3.

The reflector plate 2 has an outer shape of a substantially quadric curved surface, a lamp 3 is disposed inside the reflector plate 2, and an inner surface side thereof is a reflecting surface 2a for reflecting the light of the lamp 3. The reflecting surface 2a has a surface finish of Al vapor deposition, Ag vapor deposition, or the like in terms of light distribution control, instrument efficiency and instrument design.
It is mirror-finished by electrolytic polishing, alumite processing, etc.

[0004]

However, in the conventional lighting fixture configured as described above, the reflecting surface 2a of the reflecting plate 2 is mirror-finished when the lighting fixture is turned off, and therefore, the lighting fixture. When the luminaire is viewed from the front side, the surface of the reflection plate 2 which is the surface seen from the front side looks dark and looks unpleasant, because the diffusivity of the light incident from the outside is low. There was a problem of giving.

The present invention has been made to solve the above problems, and an object of the present invention is to prevent the surface of the reflector from appearing dark when the lighting equipment is turned off, and to have a good appearance. An object is to provide a lighting device that does not cause discomfort.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a reflecting surface 2 having an opening at least on the front surface and reflecting light from a lamp 3.
In a lighting fixture having a reflection plate 2 provided with a, the reflection surface 2a is formed to have a substantially stepwise cross section, and the stepped step 2b of the reflection surface 2a is used as an irregular reflection surface. It is characterized by that.

In the invention according to claim 2, the reflecting surface 2a is deformed by the temperature, the step portion 2b is exposed only when the lamp 3 is turned off, and the step portion 2b is exposed only when the lamp 3 is turned off. This is characterized in that the reflecting surface 2a has a stepped shape.

Further, in the invention of claim 3, the reflector 2 is supported by a small piece 2c made of a shape memory alloy having a step portion 2b at one end side, and a reflector which substantially surrounds the circumference of the lamp 3. It is characterized in that one end side of the small piece 2c is combined and formed on the inner surface side of the body 2d as the front surface side.

Further, in the invention as set forth in claim 4, the reflector 3 is provided with a small piece 2c formed by stacking two kinds of metals having different thermal expansion coefficients and having a step portion 2b on one end side thereof. It is characterized in that it is formed by combining one end side of the small piece 2c as a front surface side on the inner surface side of the reflector support 2d which substantially surrounds the circumference.

[0010]

As described above, the present invention is, in the invention described in claim 1, an illumination having a reflection plate 2 having a reflection surface 2a which is open at least on the front surface and reflects the light from the lamp 3. In the device, the reflecting surface 2a is formed so that its cross section has a substantially stepped shape, and the stepped step portion 2 of the reflecting surface 2a is formed.
Since b is an irregular reflection surface, when the lamp 3 is turned off, the stepped portion 2b which is an irregular reflection surface seen from the front side of the lighting fixture is
Diffuses the light coming from the outside of the luminaire by diffusely reflecting it.
As a result, the surface of the reflection plate 2 does not look dark, the appearance of the lighting fixture when it is turned off is improved, and no discomfort is given.

Further, in the inventions according to claims 2 to 4, the reflecting surface 2a is deformed by temperature, and the step portion 2b is exposed only when the lamp 3 is turned off. Since the reflecting surface 2a has a staircase shape only when the lamp 3 is turned off, the stepped portion 2b is not exposed when the lamp 3 is turned on, and the reflecting surface 2a maintains a predetermined reflecting surface 2a, which causes a change in light distribution and a decrease in equipment efficiency. Things will disappear.

[0012]

1 shows a first embodiment of the luminaire of the present invention, which is different from the conventional example in the reflector 2 and is configured similarly to the conventional example. There is.

The reflector 2 is made of ABS resin and has an opening on the lower surface side which is the front surface, and has an outer shape of a substantially quadratic curved surface, and the lamp 3 is arranged on the inner central axis thereof. The inner surface side is a reflecting surface 2a that reflects the light of the lamp 3. The reflecting surface 2a has a substantially stepped cross section, and the surfaces other than the stepped portion 2b are mirror-finished by Al vapor deposition in terms of light distribution control, instrument efficiency and instrument design. Therefore, when the lamp 3 is turned on, it serves as a surface that reflects the light from the lamp 3 and controls the light distribution.
For b, a white surface of the ABS resin is exposed without Al deposition and is a diffuse reflection surface, which is a surface that is hardly used for controlling the light distribution when the lamp 3 is turned on.

Because of the above structure, the lamp 3
When the lamp is turned on, the light distribution is controlled mainly by the surface of the reflecting surface 2a, which is mirror-finished, excluding the stepped portion 2b. The step portion 2b diffuses and diffuses the light incident from the outside of the luminaire, whereby the reflector 2
Since the surface of the luminaire does not look dark, the luminaire looks good when it is turned off and does not cause discomfort.

In the first embodiment, the surface of the reflecting surface 2a excluding the stepped portion 2b is anodized instead of Al vapor deposition to have a mirror finish, and the stepped portion 2b is made of a milky acrylic paint. May be applied to form a diffuse reflection surface. In this case, the same effect as that of the first embodiment can be obtained. Alternatively, the reflection plate 2 may be formed of an Al material instead of ABS, the inner surface side of which is mirror-finished by electrolytic polishing, and the step portion 2b may be coated with white paint. The same effect as the first embodiment is obtained.

FIG. 2 shows a second embodiment of the luminaire of the present invention. The difference from the first embodiment is the reflector 2 and the other parts are the same as the first embodiment. It is similarly configured.

The reflector 2 is constructed by mounting a plurality of small pieces 2c on the inner surface side of a reflector support 2d having a substantially quadric surface of revolution that substantially surrounds the circumference of the lamp 3.
c is formed of a Ni / Al alloy (shape memory alloy), has a step portion 2b on one end side and is formed in a substantially L shape, and the surface excluding the step portion 2b serves as a reflecting surface 2a. The surface of the stepped portion 2b is mirror-finished, and the stepped portion 2b is a diffuse reflection surface made of white paint or the like.

Considering an arbitrary vertical cross section of the reflector 2, the small piece 2c faces the reflector support 2d side with the tip side of the step 2b on the one end side thereof, and the one end side is the front side. As the lower side, the other end side of any one small piece 2c and one end side of the small piece 2c located above it are arranged so as to substantially abut without overlapping, and in the vicinity of the upper end of the other small piece 2c. It is fixed to the reflector support 2d, and one end is further fixed to the reflector support 2d via the spring 2e.

That is, when the lamp 3 is turned off, and the temperature of the small piece 2c is at a substantially room temperature level, one end of the small piece 2c projects inside the reflection plate 2 and the step portion 2b is exposed. When the lamp 3 is turned on and the temperature rises, the reflecting surface 2a is smooth as in the conventional example, as shown in FIG. 1B, as it has a stepwise shape as shown in a). The shape of the spring 2 is memorized so that
e is a small piece 2c which is a shape memory alloy when the lamp 3 is turned on.
However, it is said that it has a spring constant that can change to a memorized shape.

With this construction, the lighting fixture of this embodiment has the same effects as those of the first embodiment, and when the lamp 3 is turned on, the small piece 2 is used.
c is restored to the memorized shape and the step 2b is not exposed,
The reflective surface 2a maintains the same smooth predetermined reflective surface 2a as the conventional reflective plate 2 and does not affect the light distribution or the efficiency of the device.

FIG. 3 shows a third embodiment of the luminaire of the present invention. The difference from the second embodiment is the reflector 2, and the other parts are the same as the second embodiment. It is similarly configured.

The reflector 2 is similar to that of the second embodiment,
A plurality of small pieces 2c are attached to the inner surface side of the reflector support 2d, and the small pieces 2c are members formed by laminating two kinds of metals having different thermal expansion coefficients instead of the shape memory alloy (bimetal. ), The one end side of the small piece 2c is not provided with the spring 2e in the second embodiment, and thus the small piece 2c is attached to the reflector support 2d only on the upper side which is the other end side. Is.

That is, the small piece 2c is the reflector support 2
The d side is made of Ni, and the lamp 3 side inside the reflector 2 is made of Al. It is made of bimetal, and when the lamp 3 is turned off, the stepped portion 2b is exposed as shown in FIG. When the lamp 3 is turned on and the temperature rises, A
Thermal expansion coefficient (0.2313)> Ni Thermal expansion coefficient (0.151
0), the small piece 2c is deformed and the step portion 2b is hidden as shown in FIG. 7B. At this time, even if the temperature further rises, the tip of the step portion 2b is Reflector support 2
Since it is in contact with d, the small piece 2c is not further deformed and maintains the predetermined reflecting surface 2a. When the lamp 3 is turned off and the temperature drops, the small piece 2c returns to the state shown in FIG. Even with this structure, the same effect as that of the second embodiment can be obtained.

In each of the above embodiments, the shape of the reflection plate has been described as having a substantially rotational quadric surface. However, the present invention is not limited to this, and a shape having a truncated cone shape or the like may be used. It may have any shape, and in each of the above-mentioned embodiments, the stepped portion 2b serving as an irregular reflection surface may be such that the surface thereof is roughened to provide unevenness.

[0025]

As described above, according to the invention of claim 1, the present invention provides a luminaire having a reflecting plate having a reflecting surface which is open at least on the front surface and reflects the light from the lamp. Since the reflecting surface is formed to have a stepwise cross section and the step portion of the reflecting surface is a diffuse reflecting surface, the diffuse reflecting surface can be seen from the front side of the luminaire when the lamp is turned off. Part diffuses and diffuses the light incident from the outside of the luminaire, which prevents the surface of the reflector from appearing dark, which makes the luminaire look good when it is off and does not cause discomfort. .

Further, in the invention according to claims 2 to 4, the reflecting surface is deformed by temperature, the step portion is exposed only when the lamp is turned off, and the step portion is exposed only when the lamp is turned off. The reflecting surface has a step shape, so that
In addition to the effects of the invention described above, when the lamp is turned on, the stepped portion is not exposed and the reflection surface maintains a predetermined reflection surface, so that the change in the light distribution and the decrease in the efficiency of the appliance are not caused.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a first embodiment of a lighting fixture of the present invention.

FIG. 2 is a view showing a main part of a reflector according to a second embodiment of the lighting equipment of the present invention, (a) is a sectional view when the lamp is off,
(b) is a sectional view when the lamp is lit.

FIG. 3 shows an essential part of a reflector according to a third embodiment of the lighting fixture of the present invention, (a) is a cross-sectional view when the lamp is off,
(b) is a sectional view when the lamp is lit.

FIG. 4 is a partially sectional front view showing a conventional lighting fixture.

[Explanation of symbols]

 2 Reflector 2a Reflector 2b Step 2c Small piece 2d Reflector support 3 Lamp

Front page continuation (72) Inventor Kinyuki Murase 1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.

Claims (4)

[Claims] 1. A luminaire comprising a reflector having a reflection surface which is open at least on the front surface and reflects light from a lamp, wherein the reflection surface is formed to have a substantially stepwise cross section. A luminaire, wherein the stair-like step portion of the reflecting surface is an irregular reflecting surface. 2. The reflecting surface is deformed by temperature, the step portion is exposed only when the lamp is turned off, and the reflecting surface is stepped only when the lamp is turned off. The described lighting equipment. 3. The reflector is a small piece made of a shape memory alloy having a step portion on one end side, the inner surface of the reflector support that substantially surrounds the circumference of the lamp, and the one end of the small piece being the front side. The lighting fixture according to claim 2, wherein the lighting fixture is formed by combining them. 4. A small piece obtained by stacking two kinds of metals having different thermal expansion coefficients and having a step portion on one end side of the reflection plate, and the small piece on the inner surface side of the reflection plate support that substantially surrounds the circumference of the lamp. 3. The lighting fixture according to claim 2, wherein one end side of the lighting device is combined and formed as a front surface side.