Louver for lighting device and lighting device

Abstract

To provide a louver for a lighting device which can increase flexibility in setting of a gap between adjacent dousers of a plurality of dousers, and to provide a lighting device.SOLUTION: A louver 1 for a lighting device includes: a first light shielding member 12 having a pair of first side pieces 121, a plurality of first beams 123 fixed to + Z direction side end surfaces of the pair of first side pieces 121 and arranged along a Y axis direction, and first dousers 122 extending from +Y direction side ends of the respective first beams 123; and a second light shielding member 13 having a pair of second side pieces 131 in which the pair of first side pieces 121 is disposed at the inner side, a plurality of second beams 133 fixed to + Z direction side end surfaces of the pair of second side pieces 131 and arranged along the Y axis direction, and second dousers 132 respectively extend from portions, which face the inner side of the pair of first side pieces 121, in + Y direction side ends of the second beams 133. The first dousers 122 and the second dousers 132 are alternately arranged along the Y axis direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a louver for a lighting fixture and a lighting fixture. [Background technology]

[0002] A line-type base lighting fixture has been proposed that includes a substrate in the shape of a long, narrow plate on which multiple LED elements are arranged in a straight line along its longitudinal direction at a predetermined interval, a control lens provided for each LED element and having a convex portion that covers the LED element, and a louver provided for each control lens and having a shading portion that covers the outer side of the convex portion of the control lens (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-67571 Summary of the Invention [Problem to be solved by the invention]

[0004] Furthermore, among the line-type lighting fixtures described in Patent Document 1, there is provided a lighting fixture that includes a cover formed in the shape of a long rectangular box with a long window opening in the bottom wall, covering the substrate with the window opening facing the side of the substrate on which the LED elements are mounted, and a plurality of light-blocking plates arranged at a predetermined pitch along the window opening to block or redirect a portion of the light emitted from the LED elements through the window opening. A commonly used method for manufacturing louvers used in this type of lighting fixture is to form slits in a long, plate-shaped substrate corresponding to the plurality of light-blocking plates, and then bend the areas inside the slits so that they rise in the same direction in the thickness direction of the substrate. However, with this manufacturing method, the pitch of the plurality of light-blocking plates is limited by the shape and size of the light-blocking plates, which may restrict the shape of the light-blocking plates when manufacturing a louver with a plurality of light-blocking plates arranged at a short pitch.

[0005] The present invention has been made in consideration of the above-mentioned reasons, and aims to provide a louver for a lighting fixture and a lighting fixture that allow for greater freedom in the spacing between each of a plurality of shading plates and adjacent shading plates. [Means for solving the problem]

[0006] In order to achieve the above object, the louver for a lighting fixture according to the present invention comprises: a first light-shielding member having a pair of first side pieces that are elongated rectangular plates and arranged parallel to each other with a predetermined first distance apart in the thickness direction; a plurality of first beams that are elongated plates and have both ends in the longitudinal direction fixed to end faces on the first direction side in a short direction perpendicular to the thickness direction of the pair of first side pieces, and that are arranged along the longitudinal direction of the first side pieces; and a first light-shielding plate that extends from an end on the second direction side in the short direction of each of the plurality of first beams toward the second direction side that is opposite to the first direction; a second light-shielding member having: a pair of second side pieces each having a long rectangular plate shape, parallel to each other and spaced apart in the thickness direction by a predetermined second distance longer than the first distance, and arranged with the longitudinal direction along the longitudinal direction of the first side pieces, with the pair of first side pieces arranged inside; a plurality of second beams each having a long plate shape, both ends in the longitudinal direction fixed to end faces on the first direction side of the pair of second side pieces, and arranged along the longitudinal direction of the second side pieces; and a second light-shielding plate extending from a portion of the end of each of the second beams on the second direction side in the short direction that faces the inside of the pair of first side pieces toward the second direction, The plurality of first light-shielding plates and the plurality of second light-shielding plates are arranged alternately along the longitudinal direction of the first side piece. [Effects of the Invention]

[0007] According to the present invention, the distance between adjacent first and second shading plates is not limited by the shape or size of the first and second shading plates, thereby increasing the degree of freedom in the distance between adjacent first and second shading plates. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view of a louver for a lighting fixture according to an embodiment. [Figure 2] 1A is a front view of a louver for a lighting fixture according to an embodiment, as viewed from one end in the longitudinal direction thereof, and FIG. 1B is a cross-sectional view taken along line AA in FIG. 1A. [Figure 3] FIG. 1A is a plan view of a first light-shielding member according to an embodiment, and FIG. 1B is a plan view of a second light-shielding member according to an embodiment. [Figure 4] FIG. 2 is an exploded perspective view of a first light-shielding member and a second light-shielding member according to the embodiment. [Figure 5] 1A is a cross-sectional view of a first light-shielding member and a second light-shielding member according to an embodiment, and FIG. 1B is a cross-sectional view of the first light-shielding member and the second light-shielding member according to an embodiment in a partially overlapping state. DETAILED DESCRIPTION OF THE INVENTION

[0009] A louver for a lighting fixture according to an embodiment of the present invention will be described below with reference to the drawings. The louver for a lighting fixture according to this embodiment includes a first light-blocking member and a second light-blocking member. The first light-blocking member has a pair of first side pieces that are long, rectangular plates and arranged parallel to each other and spaced a predetermined first distance apart in the thickness direction, a plurality of first beams that are long, plate-like and have both longitudinal ends fixed to end faces on a first direction side in a short direction perpendicular to the thickness direction of the pair of first side pieces and are arranged along the longitudinal direction of the first side pieces, and a first light-blocking plate that extends from an end on a second direction side in the short direction of each of the plurality of first beams toward the second direction, which is opposite to the first direction. The second light-shielding member has a pair of second side pieces that are long rectangular plates, parallel to each other and spaced apart in the thickness direction by a predetermined second distance that is longer than the first distance, and that are arranged with their longitudinal directions aligned along the longitudinal direction of the first side pieces, with the pair of first side pieces arranged inside each other, a plurality of second beams that are long plates and have both longitudinal ends fixed to the first-direction end faces of the pair of second side pieces and that are arranged along the longitudinal direction of the second side pieces, and second light-shielding plates that extend from portions of the second-direction end faces of each of the second beams in the short direction that face the inside of the pair of first side pieces toward the second direction. The plurality of first light-shielding plates and the plurality of second light-shielding plates are arranged alternately along the longitudinal direction of the first side pieces.

[0010] The lighting fixture according to this embodiment includes a lighting fixture louver 1 shown in Fig. 1 and a light source (not shown) housed inside the lighting fixture louver 1. The light source includes, for example, a long circuit board (not shown) and a plurality of light-emitting units (not shown) mounted in a row along the longitudinal direction of the circuit board. The light-emitting units may be light-emitting devices having, for example, LED (Light Emitting Diode) elements.

[0011] The lighting fixture louver 1 includes a long, C-shaped louver body 11 and a first and second light-blocking members 12 and 13 housed inside the louver body 11. The louver body 11 is made of metal, resin, or the like, and, as shown in FIGS. 2 and 3 , includes a long, rectangular main piece 111 and a pair of long, rectangular side pieces 112 extending from both ends of the main piece 111 in the short direction in the same direction in the thickness direction of the main piece 111, i.e., the -Z direction. The ends of each of the pair of side pieces 112 on the -Z direction side are provided with bent pieces 113 that are bent over the entire Y-axis direction so as to protrude toward each other. Furthermore, protrusions 114 that extend along the Y-axis direction and protrude toward each other are provided near the center of the inner walls of each of the pair of side pieces 112 in the Z-axis direction. Furthermore, ribs 115 and 116 extending along the Y-axis direction are provided near both ends of the inner wall of the main piece 111 in the short direction and near the ends of the pair of side pieces 112 on the +Z direction side. A long circuit board, for example, on which the above-mentioned multiple light-emitting units are mounted in a row, is arranged between the two ribs 115 on the inner wall of the main piece 111. Here, the circuit board is fixed to the inner wall of the main piece 111 in an orientation such that the surface on which the light-emitting units are mounted faces the first light-blocking member 12 and the second light-blocking member 13, and the surface opposite to the surface on which the light-emitting units are mounted faces the inner wall of the main piece 111. Furthermore, a shaft for fixing the louver body 11 to a construction material, for example, is inserted between the ribs 115 and 116.

[0012] The first light-shielding member 12 is formed from metal, resin, or the like and includes a pair of first side pieces 121, multiple first beams 123, and multiple first light-shielding plates 122. The pair of first side pieces 121 are elongated rectangular plates and are arranged parallel to each other with a predetermined first distance W20 between them in the thickness direction. Each of the multiple first beams 123 is elongated and has both longitudinal ends, i.e., both longitudinal ends in the X-axis direction, fixed to the end faces of the pair of first side pieces 121 on a first direction side in a lateral direction perpendicular to the thickness direction, i.e., on the +Z direction side. The multiple first light-shielding plates 122 are each rectangular and extend from the end on the second direction side, i.e., the +Y direction side, of each of the multiple first beams 123 toward the -Z direction. Here, the angle formed by the extension direction of each of the multiple first light-shielding plates 122 and the Z-axis direction can be set to be equal to or greater than 30 degrees and equal to or less than 60 degrees. Furthermore, the distance W21 between two adjacent first beams 123 in the Y-axis direction shown in Fig. 3(A) is equal to or greater than the length W23 in the direction perpendicular to the X-axis direction and thickness direction of the first light-shielding plate 122 shown in Fig. 2(B). As a result, the first light-shielding plate 122 can be formed by forming a slit penetrating the base material in the thickness direction in a portion corresponding to the periphery of a long rectangular plate-shaped base material, excluding a portion continuous with the first beams 123, and then bending the portion so as to rise in the thickness direction.

[0013] 2(A) and 2(B), the second light-shielding member 13 is also formed from metal, resin, or the like, and includes a pair of second side pieces 131, multiple second beams 133, and multiple second light-shielding plates 132. The pair of second side pieces 131 are elongated rectangular plates, parallel to each other and spaced apart in the thickness direction by a predetermined second distance W30 that is longer than the first distance W20, with their longitudinal directions aligned with the longitudinal directions of the first side pieces 121. The pair of first side pieces 121 are disposed inside the pair of second side pieces 131. The multiple second beams 133 are each elongated plates, and both ends in the longitudinal direction, i.e., both ends in the X-axis direction, are fixed to the end faces of the pair of second side pieces 131 on the first direction side, i.e., the +Z direction side, and are aligned along the longitudinal direction of the second side pieces 131. The second light-shielding plate 132 extends from the second direction side in the short-side direction of each of the multiple second beams 133, i.e., from a portion facing the inside of the pair of first side pieces 121 at the end on the +Y direction side, toward the -Z direction. Here, the angle between the extension direction and the Z axis direction of each of the multiple second light-shielding plates 132 can be set to be 30 degrees or more and 60 degrees or less. Furthermore, the distance W21 between two adjacent first beams 123 in the Y axis direction shown in FIG. 3A is equal to or greater than the length W33 of the second light-shielding plate 132 in a direction perpendicular to the X axis direction and the thickness direction shown in FIG. 2B. This allows the second light-shielding plate 132 to be formed by forming a slit penetrating the base material in the thickness direction in a portion corresponding to the periphery of a long rectangular plate-shaped base material, excluding a portion continuous with the second beams 133, and then bending the portion so as to rise in the thickness direction. 3(B) is equal to or greater than the thickness W22 of the first side piece 121 of the first light-shielding member 12 shown in FIG. 3(A). This allows the second light-shielding member 13 to be placed on the first light-shielding member 12 by inserting the second side piece 131 into the gap between the first side piece 121 of the first light-shielding member 12 and the both edges of the first light-shielding plate 122 in the X-axis direction.

[0014] The multiple first light-shielding plates 122 and the multiple second light-shielding plates 132 are arranged alternately along the longitudinal direction of the first side piece 121, i.e., the Y-axis direction. Here, the distance W1 between the first light-shielding plate 122 and the second light-shielding plate 132 adjacent in the Y-axis direction is shorter than the length W23 of the first light-shielding plate 122 in a direction perpendicular to the X-axis direction and thickness direction, or the length W33 of the second light-shielding plate 132 in a direction perpendicular to the X-axis direction and thickness direction.

[0015] Next, a method for assembling the lighting fixture louver 1 according to this embodiment will be described. In the assembly method according to this embodiment, first, as shown by the arrow in Fig. 4, the second light-blocking member 13 is brought close to the first light-blocking member 12 from the +Z direction side, and the second light-blocking member 13 is overlapped with the first light-blocking member 12. Here, as shown by the arrow in Figs. 5(A) and (B), the second light-blocking member 13 is inserted into the first light-blocking member 12 along a direction inclined toward the -Y direction with respect to the Z axis direction relative to the first light-blocking member 12. Then, the overlapping first light-blocking member 12 and second light-blocking member 13 are inserted into the region between the bent pieces 113 and the protrusions 114 on the inside of the louver main body 11 from either end in the Y axis direction of the louver main body 11 shown in Figs. 2(A) and (B), thereby completing the lighting fixture louver 1.

[0016] As described above, according to the lighting fixture louver 1 of this embodiment, the distance between adjacent first and second shading plates 122 and 132 is not limited by the shape or size of the first and second shading plates 122 and 132, thereby increasing the degree of freedom in the distance between adjacent first and second shading plates 122 and 132.

[0017] Furthermore, gaps are formed between both ends of the second light-blocking plate 132 in the X-axis direction and the pair of second side pieces 131 according to this embodiment. The length W32 of the gap in the X-axis direction is equal to or greater than the thickness W22 of the first side piece 121. The length of the first side piece 121 in the short-side direction is equal to the length of the second side piece 131 in the short-side direction. This allows the second light-blocking member 13 to be overlapped on the second light-blocking member 13 by inserting the first side piece 121 of the first light-blocking member 12 into the gap. When the first light-blocking member 12 and the second light-blocking member 13 are overlapped, the end face on the +Z direction side of the first side piece 121 and the end face on the +Z direction side of the second side piece 131 can be flush with each other, thereby reducing the thickness of the lighting fixture louver 1 in the Z-axis direction. This allows the lighting fixture louver 1 to be made more compact, thereby increasing the variety of installation locations.

[0018] Although the embodiments of the present invention have been described above, the present invention is not limited to the configurations of the above-described embodiments. For example, there may be a plurality of second light-shielding members 13. In this case, the length W32 in the X-axis direction of the gap formed between both end edges of the second light-shielding member 13 in the X-axis direction and a pair of second side pieces 131 may be set to be equal to or greater than the sum of the thickness of the first side piece 121 arranged inside the gap and the thickness of the second side piece 131 of at least one other second light-shielding member 13.

[0019] In the embodiment, an example has been described in which the shape and size of the first light-shielding plate 122 of the first light-shielding member 12 and the shape and size of the second light-shielding plate 132 of the second light-shielding member 13 are substantially the same, but the shapes and sizes of the first light-shielding plate 122 and the second light-shielding plate 132 are not limited to this. For example, the shape of the first light-shielding plate 122 may be different from the shape of the second light-shielding plate 132, or the length of the first light-shielding plate 122 in the direction perpendicular to the X-axis direction and the thickness direction may be different from the length of the second light-shielding plate 132 in the direction perpendicular to the X-axis direction and the thickness direction.

[0020] Although the embodiments and modifications of the present invention have been described above, the present invention is not limited to these. The present invention includes any combination of the embodiments and modifications, and any combination to which appropriate modifications have been made. [Industrial Applicability]

[0021] The present invention is suitable for lighting fixtures that use a lighting fixture louver in which the distance between adjacent light blocking plates is narrow. [Explanation of symbols]

[0022] 1: lighting fixture louver, 11: louver body, 12: first light blocking member, 13: second light blocking member, 111: main piece, 112: side piece, 113: bent piece, 114: protrusion portion, 115, 116: rib, 121: first side piece, 122: first light blocking plate, 123: first beam, 131: second side piece, 132: second light blocking plate, 133: second beam

Claims

1. a first light-shielding member having a pair of first side pieces each having a long rectangular plate shape and arranged parallel to each other with a predetermined first distance apart in the thickness direction; a plurality of first beams each having a long plate shape and both ends in the longitudinal direction fixed to end faces on a first direction side in a short direction perpendicular to the thickness direction of the pair of first side pieces and arranged along the longitudinal direction of the first side pieces; and a first light-shielding plate extending from an end on a second direction side in the short direction of each of the plurality of first beams toward the second direction side opposite the first direction; a second light-shielding member having: a pair of second side pieces each having a long rectangular plate shape, parallel to each other and spaced apart in the thickness direction by a predetermined second distance longer than the first distance, and arranged with the longitudinal direction along the longitudinal direction of the first side pieces, with the pair of first side pieces arranged inside; a plurality of second beams each having a long plate shape, both ends in the longitudinal direction fixed to end faces on the first direction side of the pair of second side pieces, and arranged along the longitudinal direction of the second side pieces; and a second light-shielding plate extending from a portion of the end of each of the second beams on the second direction side in the short direction that faces the inside of the pair of first side pieces toward the second direction, The plurality of first light-shielding plates and the plurality of second light-shielding plates are arranged alternately along the longitudinal direction of the first side piece. Louvers for lighting fixtures.

2. a gap is formed between both end edges of the second beam of the second light-shielding plate in the longitudinal direction and the pair of second side pieces; The length of the gap in the longitudinal direction of the second beam is equal to or greater than the thickness of the first side piece. The louver for a lighting fixture according to claim 1 .

3. The length of the first side piece in the short side direction is equal to the length of the second side piece in the short side direction. The louver for a lighting fixture according to claim 1 or 2.

4. There are a plurality of second light blocking members. The louver for a lighting fixture according to claim 1 or 2.

5. A light source and a louver for a lighting fixture, the light source being disposed inside the louver; The louver for lighting fixtures comprises: a first light-shielding member having a pair of first side pieces each having a long rectangular plate shape and arranged parallel to each other with a predetermined first distance apart in the thickness direction; a plurality of first beams each having a long plate shape and both ends in the longitudinal direction fixed to end faces on a first direction side in a short direction perpendicular to the thickness direction of the pair of first side pieces and arranged along the longitudinal direction of the first side pieces; and a first light-shielding plate extending from an end on a second direction side in the short direction of each of the plurality of first beams toward the second direction side opposite the first direction; a second light-shielding member having a pair of second side pieces each having a long rectangular plate shape, being parallel to each other and spaced apart in the thickness direction by a predetermined second distance longer than the first distance, and arranged with the longitudinal direction along the longitudinal direction of the first side pieces, with the pair of first side pieces arranged inside; a plurality of second beams each having a long plate shape, both ends in the longitudinal direction fixed to the end faces of the pair of second side pieces on the first direction side, and arranged along the longitudinal direction of the second side pieces; and a second light-shielding plate extending from a portion of the end of each of the second beams on the second direction side in the short direction that faces the inside of the pair of first side pieces toward the second direction, The plurality of first light-shielding plates and the plurality of second light-shielding plates are arranged alternately along the longitudinal direction of the first side piece. Lighting fixtures.

Images