JP7025484B2 - Cover member of light source unit - Google Patents

Description

The present invention relates to a lighting fixture used by being attached to a structure.

Conventionally, in a straight tube type LED lighting directly attached to a ceiling or embedded in a ceiling, a type of LED lighting fixture in which a light source unit is housed in a housing recess provided in a long lighting fixture main body has been known. However, in general, in the type of LED lighting fixture in which the light source unit is housed in the accommodating recess of the lighting fixture main body, the light source unit has diffusivity in the state where the long light source unit is attached to the long lighting fixture main body. A gap is created between the cover member and the accommodation recess in the width direction (hereinafter, left and right means the left and right in the width direction), and when the LED light source in the light source unit is turned on, the gap is streaked. There was a problem that it became dark and looked bad when looking up at the lighting equipment.

Therefore, a light source unit having a shape having a pair of left and right extending portions extending outward from the pair of left and right protruding wall portions for mounting the mounting member for mounting the LED substrate, which is a part of the cover member. Is known (see Patent Document 1).
In the light source unit of Patent Document 1, the cover member overlaps each of the pair of extending portions in the directions orthogonal to the longitudinal direction and the width direction of the instrument body so as not to form a gap with the opening edge of the accommodating recess. According to this, unlike a general lighting fixture, there is no left-right gap between the cover member and the accommodating recess, and when the light source unit is turned on, it does not become dark like a streak. The appearance when lit can be improved.
However, in the light source unit of Patent Document 1, the cover member is merely provided with a pair of left and right extension portions, and the light emitted from the LED light source is efficiently delivered to the extension portions to illuminate the entire cover. Sufficient consideration was not given to the point of achieving uniformity.

Japanese Unexamined Patent Publication No. 2014-78511 (Patent No. 5492344)

In view of such a situation, it is an object of the present invention to provide a cover member which can make the brightness of the cover member in the width direction uniform and further improve the appearance at the time of lighting in the light source unit.

That is, the cover member of the light source unit of the present invention includes an LED substrate on which a plurality of LED light sources are mounted, a cover member having diffusivity for covering the LED substrate, and a mounting member for mounting the LED substrate and the cover member. In a straight tube type LED lighting fixture in which the light source unit and the fixture main body formed in a long shape and provided with a storage recess along the longitudinal direction are separated, the cover member is a portion that bulges to the front and covers. An arc-shaped portion whose inner end is located outside the opening end of the accommodating recess, a folded portion which is a portion to be folded inward from both ends of the arc-shaped portion and is folded inward from the opening end of the accommodating recess, and an accommodating recess. It is located inside the opening end and has a pair of protruding wall portions that are orthogonal to the folded portion along the longitudinal direction.
In the light source unit, a part of the light emitted from the LED light source passes through the arcuate portion of the cover member, and a part is reflected on the inner surface of the cover member. Then, the light reflected on the inner surface of the cover member is further reflected on the LED substrate, the mounting member, and the folded portion, and reaches the arc-shaped portion of the cover member again. Therefore, by adjusting the material and width of the folded part, the light that reaches the folded part can be efficiently reflected, and uniform brightness can be achieved including the end of the cover member in the width direction. Is possible.

The cover member of the light source unit of the present invention may have a second protruding wall portion formed on a portion opposite to the protruding wall portion of the folded portion and located on an extension line of the base portion of the protruding wall portion. This is because the strength of the joint portion between the protruding wall portion and the folded portion can be increased by forming the second protruding wall portion.

The cover member of the light source unit of the present invention may have a plurality of protrusions formed on the opposite surface of the protruding wall portion of the folded portion and at a portion located on the extension line of the base portion of the protruding wall portion. This is because the formation of the plurality of protrusions makes it possible to increase the strength while maintaining the flexibility of the joint portion between the protruding wall portion and the folded portion. In this way, the shape is not limited to the shape that can be said to be a protrusion like the above-mentioned second protrusion, and by providing a plurality of protrusions, the number and size of the protrusions to be provided can be adjusted to form a joint. It is possible to adjust the strength and flexibility to an appropriate level.

In the cover member of the light source unit of the present invention, it is preferable that the reflectance inside the folded portion is higher than the reflectance on the surface of at least one of the LED substrate and the mounting member. This is because by increasing the reflectance inside the folded portion, the light emitted from the LED light source reaches the entire cover member, and the brightness in the width direction of the cover member can be made uniform.
In the cover member of the light source unit of the present invention, a light reflecting sheet whose reflectance inside the folded portion is higher than the reflectance of at least one of the surfaces of the LED substrate and the mounting member is attached, or the reflectance is also high. It may also form a light-reflecting coating film. This is because the brightness in the width direction of the cover member can be easily adjusted by using the light-reflecting sheet or the light-reflecting coating film.

In the cover member of the light source unit of the present invention, the reflectance inside the folded portion is adjusted according to the reflectance of at least one surface of the LED substrate and the mounting member, and gradually toward the outside in the width direction of the cover member. The brightness may be reduced, and the boundary between the cover member and the instrument body may be obscured. Thereby, for example, the brightness in the width direction of the cover member can be adjusted so that the brightness gradually becomes darker, and the boundary line between the cover member and the instrument main body can be obscured.

According to the cover member of the light source unit of the present invention, there is an effect that the brightness in the width direction can be made uniform and the appearance at the time of lighting can be further improved.

Configuration image diagram of the straight tube type LED lighting fixture of Example 1. Cross-sectional image of the cover member of Example 1 Functional explanatory view of the cover member of Example 1 Cross-sectional image of the cover member of Example 2 An explanatory view of mounting the cover member of the second embodiment. Explanatory drawing of the second ridge

Hereinafter, an example of the embodiment of the present invention will be described in detail with reference to the drawings. The scope of the present invention is not limited to the following examples and illustrated examples, and many changes and modifications can be made.

FIG. 1 shows a configuration image diagram of the straight tube type LED lighting fixture of the first embodiment. FIG. 2 shows a cross-sectional image of the cover member of the first embodiment. As shown in FIG. 1, the straight tube type LED lighting fixture 100 includes a cover member 1, a light source unit 5, an LED substrate 6, and a fixture main body 8, and the fixture main body 8 includes a hanging bolt 9 and a nut (not shown). It is attached to the ceiling material 90 using. A storage recess 81 is formed in the instrument body 8.
The cover member 1 includes an arc-shaped portion 2, a folded-back portion 3, and a protruding wall portion 4. The cover member 1 has diffusivity and is attached so as to cover the LED substrate 6. Specifically, the arcuate portion 2 is a portion of the straight tube type LED luminaire 100 that bulges downward as shown in FIG. 1, and the inner end portion of the cover is located outside the opening end of the accommodating recess 81. It is provided to do so.

As shown in FIG. 2, the folded-back portion 3 of the cover member 1 is a portion that is folded back inward from both ends of the arc-shaped portion 2, and is folded back inward from the opening end 82 of the accommodating recess 81. Further, the pair of left and right protruding wall portions 4 are located inside the opening end of the accommodating recess 81, and are provided so as to be orthogonal to the folded portion 3 along the longitudinal direction.

As shown in FIG. 1, the light source unit 5 includes a mounting member 51 and a power supply device 52. Further, a plurality of LED light sources 61 are mounted on the LED substrate 6. The mounting member 51 is for mounting the LED substrate 6 and the cover member 1, and the power supply device 52 supplies electric power to the LED light source 61.

Here, the function of the cover member 1 will be described. FIG. 3 shows a functional explanatory view of the cover member of the first embodiment. As shown in FIG. 3, the locking portion 41 is composed of an overhanging portion 41a and a hook portion 41b. The end portion 51a of the mounting member 51 is locked in the space formed by the overhanging portion 41a and the hook portion 41b, and the LED substrate 6 is attached to the cover member 1 by using the mounting member 51.

A light reflecting sheet 7 is attached to the folded-back portion 3 of the cover member 1. A part of the light emitted from the LED light source 61 passes through the arcuate portion 2 of the cover member 1, and a part of the light is reflected on the inner surface of the cover member 1. Then, the light reflected on the inner surface of the cover member 1 is further reflected by the LED substrate 6, the mounting member 51, and the light reflecting sheet 7, and reaches the arc-shaped portion 2 of the cover member 1 again.
For example, in the light 12a, a part of the light emitted from the LED light source 61 is reflected on the inner surface of the arcuate portion 2, further reflected by the LED substrate 6, reaches the arcuate portion 2 again, and forms the arcuate portion 2. It is the transmitted light. In the light 12b, a part of the light emitted from the LED light source 61 is reflected on the inner surface of the arcuate portion 2, further reflected by the mounting member 51, reaches the arcuate portion 2 again, and passes through the arcuate portion 2. It is light. Further, in the light 12c, a part of the light emitted from the LED light source 61 is reflected on the inner surface of the arcuate portion 2, further reflected by the light reflection sheet 7, reaches the arcuate portion 2 again, and reaches the arcuate portion 2 again. It is the light transmitted through.

By providing the cover member 1 with the folded portion 3, the material of the light reflecting sheet 7 and the width W of the folded portion 3 and the light reflecting sheet 7 are appropriately adjusted so that the light (12a to 12c) has uniform brightness. It is possible to adjust. For example, when the brightness of the light 12b is not sufficiently obtained, the width W of the folded portion 3 and the light reflecting sheet 7 can be made larger so that the light 12b can be reflected by the light reflecting sheet 7 instead of the mounting member 51. It is possible to increase the light reflection efficiency and make the light 12b brighter.
As described above, the cover member 1 is not simply characterized in that it extends outward from the opening end 82 of the accommodating recess 81 shown in FIGS. 1 and 2, but as a folded-back portion 3, the opening end of the accommodating recess 81 is provided. By folding back to the inside from 82, it is characterized in that uniform brightness including the end portion in the width direction of the cover member 1 can be realized.

FIG. 4 shows a cross-sectional image of the cover member of the second embodiment. As shown in FIG. 4, the cover member 11 is formed on the opposite surface of the protruding wall portion 4 of the folded-back portion 3 and the second protruding wall portion 42 is formed at a portion located on an extension line of the base portion of the protruding wall portion 4. Has been done. The meaning of forming such a second protruding wall portion 42 will be described with reference to FIGS. 5 and 6.

FIG. 5 shows an explanatory view of mounting the cover member of the second embodiment. As shown in FIG. 5, in the cover member 11, the protruding wall portion 4 is provided with a locking portion 41. As described above, the locking portion 41 is composed of an overhanging portion 41a and a hook portion 41b. On the other hand, also in the instrument main body 8, an overhanging portion 81a is formed on the wall surface of the accommodating recess 81. Although not shown here, such a configuration is the same for the other ends of the cover member 11 and the instrument main body 8. Therefore, when the cover member 11 is attached to the accommodating recess 81 of the instrument main body 8, the overhanging portion 41a and the overhanging portion 81a come into contact with each other, so that the folded-back portion 3 and the protruding wall portion 4 are slightly bent in the direction of the arrow 13a. However, it will be inserted upward as shown by the arrow 13b.

FIG. 6 is an enlarged view of the portion A in FIG. 4, and shows an explanatory view of the second protrusion. As shown in FIG. 6, in the cover member 11, the joint portion 14a between the folded-back portion 3 and the protruding wall portion 4 and the joint portion 14b between the arc-shaped portion 2 and the folded-back portion 3 are covered members as shown in FIG. When the eleven is attached to the accommodating recess 81, the protrusion wall portion 4 is most likely to receive a load due to bending.
Therefore, in order to increase the strength of the joint portion 14a, the second protrusion wall portion 42 is formed on the opposite surface of the protrusion wall portion 4 of the folded portion 3 and located on the extension line of the base portion of the protrusion wall portion 4. It is a thing. The convex portion 21 is also formed in the joint portion 14b, but the convex portion 21 is provided lower than the second protrusion 42 because it is a portion that comes into contact with the instrument main body 8.

(Other examples)
1) The folded-back portion 3 may be made of a material whose inner reflectance is higher than that of at least one of the LED substrate 6 and the mounting member 51.
2) In the cover member 11 of the second embodiment, the light reflecting sheet 7 may be provided on the folded-back portion 3.
3) In the cover member 11 of the second embodiment, a plurality of protrusions may be formed instead of the second protrusion 42.

INDUSTRIAL APPLICABILITY The present invention is useful as a cover member for a lighting fixture directly mounted on a ceiling.

1,11 Cover member 2 Arc-shaped part 3 Folded part 4 Protruding wall part 5 Light source unit 6 LED board 7 Light reflection sheet 8 Instrument body 9 Suspension bolt 12a-12c Light 13a, 13b Arrow 14a, 14b Joint part 21 Convex part 41 Stop 41a, 81a Overhanging part 41b Hook part 42 Second protruding wall part 51 Mounting member 51a End part 52 Power supply device 61 LED light source 81 Containment recess 82 Opening end 90 Ceiling material 100 Straight tube type LED lighting fixture A part W width

Claims (5)

An LED board on which a plurality of LED light sources are mounted, a diffusible cover member that covers the LED board, and a light source unit that includes the LED board and a mounting member for mounting the cover member, and formed in a long shape. In a straight tube type LED lighting fixture that is separated from the fixture body that is provided with a housing recess along the longitudinal direction.
The cover member is
An arcuate portion that bulges to the front and whose inner end of the cover is located outside the opening end of the accommodating recess.
A folded portion that is folded inward from both ends of the arc-shaped portion and is folded inward from the opening end of the accommodating recess.
A pair of protruding wall portions located inside the opening end of the accommodating recess and orthogonal to the folded portion along the longitudinal direction.
Formed so as to be orthogonal to the folded-back portion and to extend the protruding wall portion at a portion of the folded-back portion opposite to the protruding wall portion and located on an extension line of the base portion of the protruding wall portion. The second protrusion to be made, and
A cover member for a light source unit, characterized in that a joint portion between the arcuate portion and the folded portion is provided with a convex portion formed so as to be orthogonal to the folded portion . The cover member for a light source unit according to claim 1, wherein the second protruding wall portion is formed at a height that does not interfere with the arcuate portion . The cover member for a light source unit according to claim 1 or 2 , wherein in the cover member, the reflectance inside the folded portion is higher than the reflectance on the surfaces of the LED substrate and the mounting member. The cover member is characterized in that a light-reflecting sheet is attached or a light-reflecting coating film is formed in which the reflectance inside the folded portion is higher than the reflectance on the surface of the LED substrate and the mounting member. The cover member for the light source unit according to claim 1 or 2 . In the cover member, the reflectance inside the folded portion is adjusted according to the reflectance between the surfaces of the LED substrate and the mounting member, and the brightness gradually decreases toward the outside in the width direction of the cover member. The cover member of the light source unit according to claim 1 or 2 , wherein the boundary between the cover member and the instrument main body is obscured.

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