JPS5944704A - Local illumination and down light type illuminator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a downlight type lighting fixture that is capable of local illumination of a desired wall or other specific location in addition to base illumination of a floor or the like.

When it comes to indoor lighting, particularly in-store lighting, there are cases where it is desired to illuminate a specific area, such as a display shelf, for example, and in such cases, conventionally, it has been common to additionally use local lighting equipment.

Recently, an attempt has been made to use a single lighting fixture for this purpose, and an auxiliary reflector is installed inside the reflector of the main lighting fixture, but the light distribution control by this auxiliary reflector is insufficient, so the intended effect is not achieved. The drawback was that a composite lighting effect could not be obtained.

In order to eliminate such conventional drawbacks, the present invention has devised a combination of an auxiliary reflector with respect to a light source of a main lighting fixture and a configuration of its reflecting surface.Hereinafter, an embodiment of the lighting fixture of this invention will be described. do.

In other words, (a), (b), and (c) in Fig. 1 show an embodiment of the present invention in which a dawan light is used as the main lighting device. In Fig. 9, (1) is a lamp, and (la) is its light emitting part. It is elongated in the direction of the lamp axis.

(2) is a well-known downlight type reflector shade installed around the lamp axis (X+X2) of this lamp, and (3) is an auxiliary reflector plate installed inside this reflector shade.
The reflective surface (8a) is the light emitting part (1a) of the lamp (1).
) is composed of a paraboloid of a predetermined arc width with the center (0) as the focal point, and the mountings provided at the tips (8b) (8c) of the image are metal fittings (4a) (4b+ and the internal pressure of the reflective shade (2) It is mounted so that it can rotate, and furthermore, its rotation axis (Yly,) is connected to the light emitting part (1a) of the lamp +11.
The lamp is arranged perpendicularly to the lamp axis (X+Xt) at the center (0) of the lamp. (6a) (5b) is the support shaft of the metal fitting (4al (41)), (2a) (2b)
) is an arm to which each of the above-mentioned support shafts (5a) and (5b), which are protruding from the inner surface of the reflective shade (2) in a opposed manner, is attached.

The first one with the auxiliary reflector (3) completely housed inside the reflector (2)
In the configuration shown in the figure, the reflective surface (8a) of this auxiliary reflective plate (3)
) is made into a mirror surface as intended, the light incident on the reflective surface (8a) K from the center (0) of the light-emitting part (1a) of the lamp (1) is reflected by a predetermined circular arc constituting this reflective surface (8a). Because it will face the optical axis direction of the paraboloid of width.

By rotating the auxiliary reflector (3) as desired, the optical axis can be reliably directed in the desired direction.

FIG. 2 shows this state, and FIG. 4 is a light distribution curve diagram at that time.

FIG. 8 is a light distribution curve diagram in the state shown in FIG. 1 in which the optical axis direction of the auxiliary reflector (3) is set to overlap the light distribution for base illumination produced by the reflector (2).

Since the downlight type lighting equipment of the present invention has configurations 1 to 1 as described above, a desired light distribution curve can be obtained by simply changing the relative positional relationship of the auxiliary reflector to the reflector within the reflector. It is possible to obtain a downlight-type lighting fixture for complex illumination that can be obtained reliably, and therefore allows easy light distribution control for the entire fixture and has good light distribution efficiency.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the downlight type lighting fixture of the present invention, in which (a) is a vertical cross-sectional view of the main part, (b) is a cross-sectional view of the main part, (C) is a bottom view, and Fig. 1 is a vertical sectional view of the main part showing a state in which the auxiliary reflector is rotated and the irradiation angle is changed from the state shown in FIG. 1, and FIG. ．． FIG. 4 is a light distribution curve diagram of the entire fixture in the local illumination state shown in FIG. 2. In the figure, (1) is the lamp, (la) is its light emitting part,
(2) is the reflective shade, (3) is the auxiliary reflector, (8a) is its reflective surface, (5a) (5b) is the rotation support shaft of this reflector, (x+-X,) is the lamp axis, ( YtYt
) is the rotation axis of the auxiliary reflector. In other figures, the same reference numerals indicate the same parts. Agent Makoto Kuzuno - Itai 1 Figure (CL) tb) (ko)

Claims (1)

[Claims] The axis of rotation passing through both support axes of the auxiliary reflector in the downlight type reflector shade, whose reflecting surface is a paraboloid with a predetermined arc width with the center of the light emitting part of the lamp as the focal point, A downlight-type lighting fixture for both local lighting and local lighting, characterized in that the light-emitting parts of the runs and the lights are disposed at the center of the light-emitting parts thereof, facing each other so as to be perpendicular to the axis of the lamp.