JPS631371Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to lighting equipment, particularly to light distribution control thereof.

In general, it is difficult for lighting equipment with a globe to achieve both design and light distribution characteristics, so when the design is important, the gloves used are often transparent, translucent, patterned ground glass, etc. Therefore, the light distribution is uncontrolled, circular light distribution centered on the light source, and has no characteristics. On the other hand, in order to control the light distribution, a prism glass globe or a parabolite aluminum reflector plate is used, which has the disadvantage of being expensive as well as being restrictive in terms of design.

A specific example will be explained with reference to FIGS. 1 and 2.

In the figure, reference numeral 2 denotes a housing of a lighting fixture, on which a translucent glove 3 is worn. Reference numeral 5 denotes a socket base attached to the center of the inner upper surface of the housing 2, into which the socket 4 is mounted. 1 is a light source attached to the socket 4, and 6 is an arm for attaching the housing 2 to the pole 7. In the lighting equipment constructed in this way, the material of the translucent globe 3 is transparent, translucent, patterned frosted glass, etc.
Even if there is a change in design, the light distribution will be a circular light distribution that spreads horizontally and downwards from the light source as shown in Figure 2, even if the size of the shape changes somewhat. Furthermore, even if the position of the light source 1 is changed up or down, the shape of the light distribution remains round and does not change. When using lighting equipment with this kind of light distribution, for example, there is no problem when used for outdoor lighting or when illuminating an entire plaza, such as general lighting, but it is especially suitable for plazas in apartment complexes such as Mansion 8, and in residential areas, as shown in Figure 3. When used on the streets of stores, the range of use is limited because it glares at people and causes problems such as light pollution, and it also causes problems in terms of effective use of light, emitting unnecessary light in the necessary direction. Ta.

The present invention eliminates the above drawbacks.

The structure of one embodiment of the present invention will be explained below with reference to FIGS. 4 to 9. FIG. 4 shows an example of a translucent globe 3 used in the lighting equipment of the present invention, which is constructed by specially baking white paint onto the front and back surfaces of a transparent glass 10 at approximately equal intervals so as not to overlap each other. A semi-transparent film 11 having a horizontal striped pattern is formed.
Therefore, the transmission a of the light from the light source 1 through the semi-transparent film 11 is small, and the transmission b through the transparent glass portion is large. Also, the thickness t ₁ of the transparent glass 10 and the semi-transparent film 11
Since the width t2 of the _two is processed to be almost the same, the angle at which the light emerges is approximately 45°.

Of course, by changing this interval, the angle and amount of light emitted can be freely changed. Moreover, a non-transparent film may be formed instead of the semi-transparent film 11.

On the other hand, an example of a lighting fixture using the translucent globe 3 will be explained with reference to FIGS. 5 and 6. Reference numeral 1 indicates a light source. Reference numeral 2 denotes a case of a lighting fixture that houses the light source 1 therein, and a translucent glove 3 having the above-mentioned structure is attached to the case. Reference numeral 5 denotes a socket base bent into an approximately 45° L-shape, with a light source socket 4 attached to the center of the long leg, and a light source socket 4 attached to the end of the long leg and the side of the light source socket 4. The housing 2 is attached to the short legs that are slanted so that the light source socket 4 is sandwiched therebetween.
Screw holes 14 and 15 are formed to serve as attachment portions. 16 is Natsu.

In a lighting fixture with such a configuration, first, when installing the light source 1 at a position approximately in the center of the lighting fixture, first insert the mounting screw holes 14 into the housing 2 provided in the short legs of the socket base 5 into the housing 2. Mounting bolt 12 provided
Insert it into the hole and secure with nut 16. This places the light source 1 approximately in the center of the luminaire. The light distribution at this time is such that a large amount of light emitted from the light source 1 in the horizontal direction hits the semi-transparent film 11 of the translucent globe 3, so that the amount of light emitted is small. The higher and lower the translucent globe 3, the more light passes through the transparent glass part 10, and therefore the light distribution of the lighting fixture is smaller in the horizontal direction.
The shape of the light distribution shown in FIG. 7 is projected in the vertical direction.

Next, when the screw holes 15 for attaching the long legs of the socket base 5 to the housing 2 are used, the position of the light source 1 is set to be at the top surface B of the lighting fixture.
At this time, the light distribution is as shown in Fig. 8, since most of the light that passes through the transparent glass part 10 of the translucent globe 3 is downward, so there is less light in the upward and horizontal directions, and the light distribution is such that it projects downward. , that is, the lower surface illuminance increases.

The conditions for controlling the light distribution in the above embodiment are as shown in FIG _.
The width t ₂ of the semi-transparent film 11 and the distance X between the transparent globe 3 and the light source 1 are determined by the height Y between the transparent globe 3 and the light source 1. In the above embodiment, the thickness t ₁ of the glass and the width t ₂ of the semi-transparent film 11 are approximately the same. The relationship X/Y between the translucent globe 3 and the light source 1 is that when the light source 1 is A, X=Y, when B, X<Y, and the projection of the light distribution in the case of A is 40 to 45 degrees in both the vertical direction, For B, downward
The direction is 40~45°. As described above, according to the present invention,
With an extremely simple structure, the position of the light source can be changed, and by changing the mounting direction of the socket base, it is possible to obtain light distribution with two different characteristics with the same lighting fixture. In other words, by positioning the light source approximately in the center of the lighting fixture, effective light distribution can be obtained when light is needed on the top and bottom surfaces, such as in open spaces with many trees, and by positioning the light source at the top of the lighting fixture. In this case, the shape of the light distribution will be in places where light is not needed upwards, and places where illuminance is needed downwards, such as areas near apartment complexes where the light from lighting equipment is harmful, and squares such as stores with residential buildings, etc. The most effective light distribution can be obtained when used on streets. Furthermore, the translucent globe has a horizontal striped pattern formed on the transparent glass, giving it a linear and simple design, which is particularly effective for fitting into cube-shaped lighting fixtures designed with straight lines. .

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing a conventional lighting equipment, Fig. 2 is its light distribution curve diagram, and Fig. 3 is also a light distribution explanatory diagram.
4 to 9 show an embodiment of the present invention,
Fig. 4 is a detailed sectional view of the globe, Fig. 5 is a sectional view showing the mounting position of the light source, Fig. 6 is a perspective view of the socket base, Figs. 7 and 8 are light distribution curve diagrams, and Fig. 9 is a sectional view showing the mounting position of the light source. FIG. 3 is a sectional view of the globe illustrating the relationship between the globe and the light source. In the figure, 1 is the light source, 2 is the housing, 3 is the glove, and 4
1 is a socket, 5 is a socket base, 11 is a semi-transparent or non-transparent film, and 14 and 15 are mounting screw holes (attachment portions).
Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A casing 2, a socket pedestal 5 which is detachably attached to the casing and has a lamp socket 4 fixed thereto, a light source 1 which is attached to the lamp socket 4, and which is attached to the casing 2 and houses the light source 1 therein. The socket pedestal 5 has both sides of the lamp socket 4 connected to the housing 2, and one of these attachment parts is connected to the lamp socket 4.
The globe 3 is formed of a translucent material, and a semi-transparent or non-transparent film with a horizontal striped pattern is formed on the inner and outer surfaces of the globe 3 so as not to overlap with each other. 11.