JPH0511603Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a lighting fixture with a louver installed on a ceiling or the like.

[Problems that conventional technology and ideas try to solve]

Conventionally, in a louver-equipped lighting fixture in which a louver 41 is mounted and held on a frame 42 on its outer periphery as shown in FIG. It is made to protrude toward the non-shading range side. That is, the lower end of the outermost louver piece 43 and the louver piece 44 facing this louver piece 43.
A straight line connecting the upper end of the frame body 42 is a light-shielding boundary line l', and a part of the frame body 42 is made to protrude beyond this line l' to the side of the non-shading range. α' is the shading angle.

Therefore, the protruding portion of the frame 42 is connected to the louver piece 43.
This caused problems in both efficiency and appearance. Specifically, the light m shown by the dotted line emitted from point P does not reflect at point Q due to primary and secondary reflection as shown in the figure. However, since the light n shown by the dashed line emitted from point R has an angle deeper than the shielding angle α', it is reflected on the inner surface of the louver piece 43 and visible to the human eye 46 below.

In order to reduce reflection, it is necessary to make the frame 42 thinner, which reduces its strength.

Furthermore, the one shown in FIG. 4 has been conventionally proposed. In this example, for the outermost louver piece 52,
A louver piece 51 perpendicular to this is made to protrude outward,
Louver frame 58 fixed to this outer protruding portion 51a
is placed on the frame 53. The louver piece outer protruding portion 51a has the same vertical width as the outermost louver piece 52, so in order to arrange the frame 53 outside the light-shielding angle, the frame 53 needs to be spaced outward from the outermost louver piece 52. . In order to separate the frame body 53 to the outside in this manner, it is necessary to prevent light from leaking through the gap between the louver piece 52 and the frame body 53, and a light shielding plate 56 is provided. In order to bring the frame 53 closer to the louver piece 52, it is necessary to make the frame 53 thinner, which weakens its strength and makes it difficult to make the gap sufficiently small.

As described above, in this conventional method, the light shielding plate 56 is required, and since the louver frame 58 is provided, the structure becomes complicated. Furthermore, since the frame body 53 is moved outward, there is a problem that the external shape of the lighting fixture becomes larger in proportion to the opening area formed between the pair of outermost louver pieces 52.

The purpose of this invention is to prevent the reflection of the frame onto the louver surface, to make the frame sufficiently thick and durable, and to reduce the size of the lighting equipment in a type of fixture in which the louver is supported by being placed on the frame. It is an object of the present invention to provide a lighting fixture with a louver, which can further simplify the structure.

[Means to solve the problem]

A lighting fixture with a louver of this invention is a lighting fixture with a louver in which a louver is mounted and held on a frame on its outer periphery, and the lower end of the outermost louver piece of the louver and the upper edge of the louver piece facing this louver piece. The entire frame is positioned closer to the light-shielding range than the light-shielding boundary line connecting the two. The outermost louver piece is provided with an engagement piece located above its lower end for engagement with the frame. The frame body is arranged such that the upper surface of the mounting portion of the engagement piece is deviated upward from the lower end of the outermost louver piece, and the inner end of the mounting portion is close to the outer surface of the outermost louver piece. let

[Effect]

According to the configuration of this invention, since the entire frame holding the louver is placed closer to the light-shielding range than the light-shielding boundary line of the louver, the frame is no longer reflected in the louver.

In this case, the engagement piece that holds the louver on the frame is provided directly on the outermost louver piece, and since this engagement piece is located above the lower end of the louver piece, the frame can be deviated above the lower end of the outermost louver piece, and the inner end of the mounting portion can be brought close to the outer surface of the outermost louver piece.

In this way, since the frame is offset above the lower end of the louver piece, it can be made thicker and stronger by the offset, and the entire frame is located outside the light-shielding range to eliminate reflections. be able to.

Further, since the frame body is located close to the outer surface of the louver piece, it is possible to eliminate light leakage from between the louver piece and the frame body.

〔Example〕

An embodiment of this invention will be described based on FIGS. 1 and 2. This lighting fixture with a louver is a lighting fixture with a louver in which a louver 1 is mounted and held on a frame 2 on the outer periphery, and includes a lower end F of an outermost louver piece 3 of the louver 1 and a louver piece 4 facing this louver piece 3. The entire frame 2 is located on the side of the light-shielding range, that is, on the upper side of the light-shielding boundary line l connecting the upper edge of the frame 2.

The frame 2 is integrally formed around the opening of the downward groove-shaped instrument main body 5. The frame 2 may be formed separately from the instrument body 5 and attached to the instrument body 5. The appliance body 5 is fitted into an opening in the ceiling,
The frame body 2 is brought into contact with the lower surface of the ceiling opening frame 6.

The louver 1 has two sets of louver pieces 3 and 4 facing each other along the longitudinal direction of the instrument body 5 arranged side by side, and a large number of sets of louver pieces 7 (FIG. 2) in the width direction to form a lattice-like structure. It is. An engaging piece 8 is provided directly protruding from the outer surface of the louver piece 3, and the louver 1 is placed on the inner protrusion 2a of the frame body 2 by means of the engaging piece 8. The engagement piece 8 is located above the lower end of the louver piece 3.

The dimensional relationship is explained as 2H/(E-C)≦tanα. E is the width between the lower ends of the inner protrusion 2a of the frame 2, C is the width of the louver 1, and H is the inner protrusion 2.
The height of a and α are the inclination angle of the shading boundary line l, that is, the shading angle. D is the width between the upper edges of the inner protrusion 2a of the frame 2, A is the inner dimension of the frame 2, and B is the width between the tips of the engaging pieces 8 on both sides.

According to this configuration, the frame body 2 that holds the louver 1
Since the entire frame body 2 is placed closer to the light-shielding range than the light-shielding boundary line l of the louver 1, the frame body 2 will not be reflected on the louver surface 3a. Therefore, the efficiency of the fixture is improved, and the appearance and light distribution are also improved.

The engagement piece 8 that holds the louver 1 on the frame 2 is provided directly on the outermost louver piece 3, and this engagement piece 8 is positioned above the lower end of the louver piece 3, so that The frame body 2 can be displaced above the lower end of the outermost louver piece 3, and the inner end of the mounting portion can be brought close to the outer surface of the outermost louver piece 3.

In this way, since the frame 2 is offset above the lower end of the louver piece 3, the frame 2 can be made thicker and stronger by the amount of the offset, and the entire frame can be positioned outside the light-shielding range. You can eliminate reflections by

Moreover, since the frame body 2 is placed close to the outer surface of the louver piece 3, light leakage from between the louver piece 3 and the frame body 2 can be prevented. Since this light leakage is eliminated, other light leakage prevention means are not required. Furthermore, since the engaging piece 8 is placed on the frame 2, there is no need for a means such as the conventional louver frame for mediating between the frame 2 and the louver piece 3. These simplify the configuration.

Furthermore, the frame body 2 is located close to the outermost louver piece 3.
, the outer shape of the frame 2 can be minimized with respect to the opening surface formed between the pair of outermost louver pieces 3.

[Effect of idea]

In the lighting fixture with a louver of this invention, the entire frame holding the louver is placed closer to the light-shielding range than the light-shielding boundary line of the louver, so the frame is not reflected on the louver surface. Therefore, the efficiency of the equipment is improved and the appearance is also improved.

In addition, the engagement piece that holds the louver on the frame is provided directly on the outermost louver piece, and this engagement piece is located above the lower end of the louver piece, so that the frame can be held in the outermost position. It is possible to deviate upward from the lower end of the outer louver piece, and to bring the inner end of the mounting portion closer to the outer surface of the outermost louver piece.

In this way, since the frame body is offset above the lower end of the louver piece, the frame body can be made thicker and more durable by the amount of the offset, and the frame body can be positioned entirely outside the light-shielding area to be reflected. You can eliminate congestion.

Further, since the frame body is located close to the outer surface of the louver piece, it is possible to eliminate light leakage from between the louver piece and the frame body. Since this light leakage is eliminated, other light leakage prevention means are not required. Moreover, since the engaging piece is placed on the frame, there is no need for a means like the conventional louver frame to mediate between the frame and the louver piece. These simplify the configuration.

Further, since the frame is provided close to the outermost louver pieces, there is an effect that the outer shape of the frame can be minimized with respect to the opening surface formed between the pair of outermost louver pieces.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of one embodiment of this invention, Fig. 2 is a perspective view of its overall appearance, Fig. 3 is a partial sectional view of a conventional example, and Fig. 4 is a partial sectional view of another conventional example. be. 1... Louver, 2... Frame body, 3, 4... Louver piece, 5... Instrument body, α... Shading angle.

Claims (1)

[Scope of utility model registration request] A louver and a frame body located on the outer periphery of the louver, an engaging piece is provided on the outermost louver piece of the louver above the lower end thereof, and the engaging piece is attached to the frame body. The louver is supported by the frame body, and the frame body deviates the upper surface of the mounting portion of the engagement piece upwardly from the lower end of the outermost louver piece, and The end of the frame is close to the outer surface of the outermost louver piece, and the frame body is positioned closer to the light-shielding range than the light-shielding boundary line connecting the lower end of the outermost louver piece and the upper edge of the louver piece facing this louver piece. A lighting fixture with a louver characterized by its entire position.