JPH0343903A - Lighting equipment - Google Patents

Abstract

PURPOSE:To provide lighting equipment of variable light distribution and a high efficiency by attaching a socket and an upper reflector in a vertically and freely moving manner to a lighting device body so that a light filament is located at the focus of the upper reflector, and vertically moving the socket and the upper reflector. CONSTITUTION:A lamp 10 is fit in a socket 14 disposed in a lighting device main body 1 of an approximately cylindrical shape with its bottom open. Reflectors 2A, 2B of ellipsoidal revolution surfaces are disposed inside the opening of the main body 1 so that a filament 16 of the lamp 10 is at the focus of the reflectors 2A, 2B. A frame 6 having an opening of a diameter smaller than the diameter of the main body 1 is fit to the bottom of the main body 1. The main body 1 is fit in a fitting recess formed in a fitting surface and the recess is covered with the frame 6. The reflectors are divided into the upper reflector 2A and the lower reflector 2B. The socket 14 and the upper reflector 2a are attached in a vertically and freely moving manner to the main body 1 so that the lamp 10 is always at the focus of the upper reflector 2A. This provides lighting equipment of variable light distribution and a high efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to lighting equipment, and particularly to so-called pinhole lights.

[Prior art] A pinhole light 1-, which is a type of downlight, is installed by embedding a lighting fixture body equipped with a lamp into a hole drilled in the mounting surface, and then opening the lower end of the lighting fixture body. This is a lighting fixture that emits light from a small transparent opening ("pinhole") formed in the center of the covering frame.The light distribution is controlled by a reflector installed inside the lighting fixture body, and the light transmission of the frame is controlled. By changing the diameter of the opening, the irradiation angle of the light blocked by the frame is changed, and the light distribution as a lighting fixture is different, making it difficult for the light source and reflector to be seen directly, making the presence of the lighting fixture less noticeable. It is.

Conventionally, the light distribution of lighting fixtures such as the above-mentioned pinhole lights is fixed, and once one end is attached to the mounting surface, it is necessary to replace the lighting fixture in order to change the light distribution. On the other hand, lighting fixtures with different light distributions have a problem in that the appearance of the lighting fixtures differs because the diameters of the light-transmitting openings in the frames are different.

On the other hand, in flashlights and other lighting equipment that can change the light distribution arbitrarily, light distribution is achieved by moving either the lamp or the reflector back and forth to change the positional relationship between the focal point of the reflector and the lamp. It is well known that it is arbitrarily variable.

Therefore, the inventor of the present application proposed a lighting device with variable light distribution as shown in FIGS. 3 and 4 by applying the above-mentioned flashlight technology to a lighting device such as the above-mentioned pinhole light. .

This lighting equipment has a substantially cylindrical lighting equipment main body l whose lower part is reduced in diameter to form a stepped part 3 for attaching a reflector plate 2, and the lower part of the stepped part 3 is narrowed down into a tapered part. A light-transmitting opening 5 is formed at the tip of the auxiliary shade 4, and a frame 6 having an outer diameter larger than the luminaire main body 1 is attached to the periphery of the light-transmitting opening 5. It is fixed by caulking.

Then, the lighting fixture body 1 is inserted into the embedded hole 8 drilled in the mounting surface 7.
, and sandwich the mounting surface 7 by the spring force of the mounting spring 9 between the frame 6 and a pair of mounting springs 9 attached to the side surface of the lighting equipment main body 1 slightly above the stepped portion 3, and then attach the lighting equipment main body l. It is attached to the mounting surface 7.

The reflector plate 2 has a shape in which a spheroidal surface is divided in the short axis direction from one end to the short axis, and is placed on the step part 3 of the lighting fixture body 1 and attached with screws, and the upper end A lamp insertion opening 11 is provided in which a lamp IO such as a halogen light bulb is inserted.

A socket base 12 is attached to the upper end of the lighting device body 1, and a socket 14 is attached below the socket base 12 via an adjustment spring 13. It is freely movable up and down relative to the stand I2. The lamp 10 mounted on the socket 14 is inserted into the reflector plate 2 through the lamp insertion opening 11.

At this time, in the lighting equipment, the reflecting plate 2 has the shape of a part of a spheroid that includes only one focal point, but the other focal point of this spheroid is transparent on the central axis of the lighting equipment body 1. It is located near the optical aperture 5.

In this lighting fixture, among the light emitted from the filament 16 of the lamp 10, the direct downward light and the light reflected by the reflector plate 2 and directly exiting from the light-transmitting opening 5 to the outside of the lighting fixture body are effectively irradiated onto the irradiation surface. However, the light reflected by the auxiliary shade 4 is attenuated within the lighting fixture body 1.

[Problem to be solved by the invention]

In the above-mentioned lighting equipment, as shown in FIG.
When the filament 16 is made approximately coincident with the focus of the reflector 2, the light emitted from the lamp 10 and reflected by the reflector 2 will be focused at the lower focus and then diffused to obtain a relatively wide-angle light distribution. can. Further, as shown in FIG. 4, when the socket 14 is pulled up toward the socket stand I2 and the filament 16 of the lamp 1o is positioned above the focal point of the reflector plate 2, narrow-angle light distribution can be obtained.

However, in the case shown in FIG. 4, among the light emitted from the lamp 10, the light emitted within the upper angle θ range is attenuated by reflection within the lighting equipment and is not effectively irradiated to the outside.
Of the light irradiated directly to the outside of the lighting fixture body 1 from the transparent opening and the light irradiated to the reflection plate 2, only the light irradiated to the lower range of angle α effectively irradiates the irradiation surface, There was a problem that the efficiency as a lighting equipment was low.

The present invention has been made in view of the above-mentioned background, and an object of the present invention is to provide a lighting fixture with variable light distribution and high efficiency.

[Means to solve the problem]

The lighting device according to the present invention includes a socket in which a lamp is mounted in a substantially cylindrical lighting device body with an opening at the bottom end, and a reflecting plate having a spheroidal surface disposed inside the opening of the lighting device body. A frame is attached to the lower end of the lighting equipment body, and a frame is attached to the lower end of the lighting equipment body, covering the upper part so that the filament of the lamp is located at approximately the focal point of the reflecting plate, and having a light-transmitting opening having a diameter smaller than the diameter of the lighting equipment main body, and a hole is formed in the mounting surface. The main body of the lighting fixture is embedded and installed in the embedded hole, the embedded hole is covered with the frame, and the reflector is divided into upper and lower parts into an upper reflector and a lower reflector, and the socket and the upper reflector are connected to each other so that the lamp reflects the upper part. It is attached to the main body of the lighting fixture so that it can be moved up and down to maintain the focal point of the plate.

[Function] According to the present invention, the socket and the upper reflector are attached to the lighting fixture body so that the lamp can move up and down so that the lamp maintains the focal position of the upper reflector, and the socket and the upper reflector can be moved up and down. As a result, the light distribution can be changed arbitrarily with the same lighting equipment, there is no need to replace the lighting equipment, and the appearance of the lighting equipment does not change.Moreover, the angle of the incident light to the reflector is large, making it difficult to use as a lighting equipment. This allows for high efficiency.

〔Example〕

1 and 2 show an embodiment of the present invention,
The basic configuration is the same as that of the proposed example, and the differences will be explained below based on the drawings.

In this lighting fixture, unlike the proposed example, the adjustment spring 13
On the other hand, the reflector 2 is divided into two parts, an upper reflector 2A which is movably attached, and a lower reflector 2B which is fixed to the luminaire main body 1, and the reflector 2 is separated from the other by the road. It is about the same height. Further, the socket 14 to which the lamp 10 is attached is supported by a guide tool 17 so as to be movable up and down, and the upper reflector 2A is movable up and down together with the socket 14 while maintaining a constant positional relationship with the lamp 10. There is.

When the socket) 14 and the upper reflector 2A are located at the uppermost position, the upper reflector 2A and the lower reflector 2B form a substantially integral spheroidal surface, as shown in FIG. A wide-angle light distribution can be obtained.

On the other hand, when the socket 14 and the upper reflector 2A are located at the lowest position, as shown in FIG. Reflected light with a narrow angle distribution can be obtained, and the light incident on the upper reflector 2A forms a relatively wide angle α,
It is highly efficient as a lighting fixture.

This lighting fixture is configured as described above, and the light distribution can be changed arbitrarily with the same lighting fixture, there is no need to replace the lighting fixture, and the appearance of the lighting fixture does not change (in addition, The efficiency of the device can be increased.

〔Effect of the invention〕

Since the present invention is configured as described above, it is possible to provide a lighting fixture with variable light distribution and high efficiency.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention,
FIG. 1 is a cross-sectional front view during wide-angle light distribution, and FIG. 2 is a cross-sectional front view during narrow-angle light distribution. 3 and 4 show proposed examples, with FIG. 3 being a cross-sectional front view during wide-angle light distribution, and FIG. 4 being a cross-sectional front view during narrow-angle light distribution. 1-Lighting equipment body, 2 Sealing plate, 2B-Lower reflector, -do, 5-=-Translucent opening, 6 Recessed hole, 10-Lamp, 1 12-Socket stand, 14 Reflector, 2A-Upper room 3-step part, 4-auxiliary upper frame, 7-mounting surface, 8 1-lamp insertion opening, socket, 16-filament, 7 guide tool.

Claims (1)

[Claims] (1) A socket in which a lamp is mounted is disposed within a substantially cylindrical lighting fixture body with an opening at the bottom end, and a reflector plate having a spheroidal surface is disposed inward from the opening of the lighting fixture body. Attach a frame to the lower end of the lighting equipment body, covering the upper part so that the filament is positioned approximately at the focal point of the reflector plate, and having a light-transmitting opening with a diameter smaller than the diameter of the lighting equipment body. In the lighting equipment in which the lighting equipment main body is embedded and installed and the embedded hole is covered with the frame, the reflector is divided vertically into an upper reflector and a lower reflector, and the socket and the upper reflector are connected to each other so that the lamp reflects the upper part. A lighting fixture characterized by being attached to a lighting fixture body so as to be movable up and down so as to maintain the focal point of the board.