JPH02106802A - Reflecting plate for lighting equipment - Google Patents

Abstract

PURPOSE:To ensure sufficient beam size required for a small opening of a reflecting plate for a small lighting equipment by providing a side plate by which the light from a lamp image mirrored on a main reflecting plate is reflected in a direction of a main beam thereof. CONSTITUTION:A main reflecting face 1d is so formed as it is widened in an optical axis of a lamp 2 and its cross sectional shape in width is formed in a paraboloid, and the light of the lamp 2 is designed to irradiate far away by tilting the direction of a main beam obliquely downward, so as to prevent the glare or leakage of the light at an elongated part 1c of a main reflecting plate 1a being deflected upward from the direction of the main beam. A side plate 1b is coated on both edges of the main reflecting plate 1a, and the light from the image of the lamp 2 mirrored on the main reflecting face 1d of the main reflecting plate 1a in a paraboloid is reflected by the side plate 1b in the direction of the main beam of the main reflecting face 1d. The main beam of the main reflecting plate 1d is complemented by the reflecting light of the side plate 1b, and the sufficient size of the main beam is thus ensured for a small opening of a reflecting plate for a small lighting equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a reflector for lighting equipment used in tennis courts, airport aprons, and the like.

[Conventional technology 1] In lighting equipment used in tennis courts, airport aprons, etc., it is necessary to make the main beam large in order to illuminate a long distance, and if the main beam is slightly shifted upward from the main beam direction, glare and light leakage may occur. It is necessary to sharply cut light to avoid problems such as (light pollution).

When the above-mentioned lighting equipment uses a lamp 2 equipped with a linear arc tube 3 such as an HID lamp, in order to obtain a main beam of a certain size, the lamp 2 is set as shown in FIG.
A reflector 1' is used which includes a main reflector 1a' which is long in the optical axis direction (direction of the operator of the arc tube 3) and has a substantially parabolic cross-sectional shape in the width direction. In other words, in this main reflecting plate 1a', the reflection directions of the lamps are uniformly aligned, so that the main beam can be enlarged to some extent. Incidentally, side plates 11) are attached to both ends of the main reflecting plate 1a', and the overall shape of the reflecting plate 1' is gutter-like. In addition, side plate 1
The inner surface of b is also a reflective surface. Further, a lath plate 4 is attached to the opening of the reflecting plate 1'.

However, if the aperture direction is in line with the direction of the main beam indicated by the arrow in the figure, such as reflector 1 in Fig. 5, glare and light leakage may occur in areas that are deviated upward from the main beam direction. This causes problems.

Therefore, as shown in FIG. 6, the upper edge of the main reflecting plate 1a' and one side edge of the side plate 1b' of the reflecting plate 1'' in FIG. There are side covers that prevent glare and light leakage in areas that are deviated upward from the main beam direction.

[Problem to be Solved by the Invention 1] However, in order to obtain a main beam of the same size as the reflector 1'' in FIG. 6 with the above-mentioned reflector 1'', it is necessary to '' must not cut the main beam.For this reason, the angle between the perpendicular to the aperture of the reflector 1a and the main beam is θ, and the parabolic reflecting surface of the main reflector 1a'' (Hereafter, it is called the main reflecting surface, and the aperture diameter of 1 d" is A.
When the width of the aperture of 1 reflector 1'' is B, it is necessary to set B = A / cos θ, and the wider the distance B is illuminated, the wider the aperture B must be. Therefore, the shape of the lighting fixture is There was a problem with the size.

The present invention has been made in view of the above-mentioned α, and its purpose is to provide a reflector for a lighting device that does not become large in size even if the necessary main beam size is secured. It is in.

[Means for Solving the Problems 1] In order to achieve the above object, the present invention includes a side plate that reflects light from the image of the lamp reflected on the main reflector in the direction of the main beam of the main reflector.

[Function] By having the above-described configuration, the present invention supplements the main beam of the main reflector with the light reflected from the side plate, and the main beam can be large enough even when the lighting equipment is small and the aperture of the reflector is small. This is to ensure that the

[Example 1 An embodiment of the present invention is shown in FIGS. 1 to 4.

The reflector 1 of this embodiment has a shape that is different from that of the conventional example shown in FIG. Yes, the direction of the main beam is directed diagonally downward so that the light from the lamp 2 is irradiated far away, and the extension part 1c of the main reflector 1a prevents glare and light leakage in areas deviated upward from the main beam direction. That's what I do.

Side plates 11) are attached to both ends of the main reflecting plate 1a, and the image of the lamp 2 (hereinafter referred to as 1 It is characterized in that the light from the secondary reflection image (referred to as a secondary reflection image) is reflected in the direction of the main beam of the main reflection surface 1d. Note that the opening of the reflector 1 faces downward as in the conventional example shown in FIG. 6, and a lamp 2 such as an HID lamp having a linear arc tube 3 is provided inside the reflector 1.

Hereinafter, a method of directing the light from the primary reflected image of the lamp 2 in the direction of the main beam using the side plate 11 will be explained. 1st
The figure shows a view of the lighting fixture cut along a plane that includes the optical axis of the lamp 2 and the main beam axis that intersects with this optical axis.
R indicates the intersection of the main beam with the main reflection surface 1d, and 1] 1F indicates the intersection of the main beam and the aperture surface of the reflection plate 1. lamp 2 1
The secondary reflected image 5 is generated on the opposite side to the main reflecting surface 1d as shown.

Here, the point where the side plate 113 intersects with the opening of the reflection plate 1 is defined as Sl
Then, by rotating the side plate 1b around this point, the lamp 2
The main beam is rotated so that the light from the primary reflected image 5 is in the irradiation direction of the main beam. Similarly, the light from the primary reflected image 5 of the lamp 2 reflected on the main reflecting surface 1d for each plane parallel to the plane shown in FIG. side plate 1b so that it faces the direction of the main beam.
form. In this way, by reflecting the light from the primary reflected image 5 of the lamp 2 reflected on the main reflecting surface 1d on the side plate 1b in the direction of the main beam on the main reflecting surface 1d, the main beam from the main reflecting surface 1d is reflected on the side plate 11). This can be supplemented by reflected light. Therefore, as shown in FIG. 7, there are two types of lighting equipment: a conventional lighting fixture including a reflecting plate 1'' in which the side plate 1b is formed perpendicular to the opening surface and the optical axis of the lamp 2, and a lighting fixture including the reflecting plate 1 of the present invention. When we actually measured the beam value, the conventional beam value was 1500 cd/1000.
What was 1e+ has become 2000cd/1000. I
n, an improvement of about 20 to 30%. Conversely, this means that the range that the main reflecting surface 1d shares in the beam direction can be made smaller, and therefore even if the aperture diameter of the reflecting plate 1 is small, it is possible to obtain the necessary main beam size. This means that lighting equipment can be made smaller.

Note that in the above explanation, the angle of the side plate 11 was changed for each plane, but in the plane that includes the optical axis of the lamp 2 and the main beam axis that intersects this optical axis (the plane in FIG. The angle α at which the side plate 1b rotates may be determined. In other words, even if the side plate I I+ is rotated by the angle α determined by this plane, almost the same effect can be expected because the deviation in the direction of light reflection from the primary reflected image 5 is small. In this case, there is no need for a complicated three-dimensional curved surface, which facilitates manufacturing and is advantageous in terms of cost.

By the way, as shown in FIG.
(Tilt the upper part of the side plate 1b'' inward about the line e, -e2, which is the contact surface of the side plate 1b'' with the glass plate 4 in FIG. Side plate 11)
'' to compensate for the lack of illuminance, but in this case, the direct light from the lamp 2 is not reflected in the main beam direction, and of course the effect of the present invention is not expected.Also,
By applying this, the side plate 1. It is possible to tilt the “b”, but
In this case, the amount of direct light from the lamp 2 directed toward the side plate 11 is small, and unlike the present invention, it cannot be expected that the primary reflected image 5 will receive any luminous flux.
Direct light cannot be reflected in the direction of the main beam unless it is tilted significantly. In this regard, in the present invention, the inclination of the side plate 1b can be reduced by reflecting the light from the primary reflection image 5.

FIG. 4 shows a lighting fixture including the reflector 1 described above.

In this lighting fixture, the reflector plate 1 of the present invention is housed in a box-shaped fixture main body 6 with an opening at the bottom, and a glass plate 4 is attached to the opening of the fixture main body 6 so as to be openable and closable. In this lighting fixture, a looper 7 is provided in the opening of the reflector 1 to further prevent glare and light leakage.
The socket 8 is attached to the socket 8 fixed to the side plate 6a of the instrument main body 6 through an insertion hole formed in one side plate 1b.

Note that the side plate 1b of this lighting fixture also has the function of supplementing illuminance in a direction (for example, downward) where illuminance is insufficient by tilting it inward as in the conventional example shown in FIG. In addition, in the above explanation, the side plate 11 was rotated so as to direct the light from the primary reflected image 5 of the lamp 2 toward the main beam direction, but of course the primary reflected image 5 of the lamp 2 is directed in the direction where the illumination is insufficient. It is also conceivable to rotate the side plate 1b so as to reflect the light.

[Effects of the Invention] As described above, the present invention includes a side plate that reflects the light from the image of the lamp reflected on the main reflector in the direction of the main beam of the main reflector, so that the main beam is reflected by the side plate. It has the effect of supplementing the main beam of the reflector and ensuring the necessary main beam size even when the lighting equipment is small and the aperture of the reflector is small.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the shape of the side plate of an embodiment of the present invention;
Fig. 2 is an explanatory diagram of the effect according to the above, Fig. 3 is an explanatory diagram showing the main beam and the primary reflected image of the lamp, and Figs. 4(a) to (
c) is a side sectional view, a bottom view, and a front sectional view of a lighting fixture equipped with a reflector according to the present invention; FIG. 5 is a sectional view of a conventional reflector; FIG. 6 is a sectional view of another conventional example; Figure 7(a),
(b) is a side sectional view and a front sectional view of the same as above, and FIG. 8 is a sectional view of still another conventional example. 1 is a reflecting plate, 1a is a main reflecting plate, 11) is a steel plate, 2 is a lamp, 3 is an arc tube, and 5 is an image. Agent Patent Attorney Ishi 1) Chief Seven Procedures Amendment (Voluntary) November 1, 1999

Claims (1)

[Claims] (1) A main reflector with the main beam direction facing away, and a main reflector attached to both ends of the main reflector to reflect the light from the lamp image reflected on the main reflector in the direction of the main beam of the main reflector. A reflector plate for lighting equipment consisting of a side plate and a side plate.