JP2023140008A - Lighting fixture - Google Patents

Abstract

To distribute illumination light while tilting in an arbitrary direction.SOLUTION: A lighting fixture includes a lense unit B1 controlling light distribution. The lense unit B1 has an incident part 93 mounted on a surface facing an LED module 20. The incident part 93 includes: a bottom part 94 facing a plurality of LEDs 200; and a pair of side walls 95 projecting toward an LED module 20 across the bottom part 94. The pair of side walls 95 includes: an incident surface 950 to which illumination light emitted from the LED 200 is incident; and a total reflection surface 951 making the illumination light incident from the incident surface 950 perform total internal reflection. The total reflection surface 951 of the pair of side walls 95 totally reflects the illumination light inside asymmetrically to the optical axis L1 of the LED 200.SELECTED DRAWING: Figure 10

Description

The present disclosure relates to a lighting fixture, and more particularly to a lighting fixture including a member that controls light distribution.

As a conventional example, a lighting device (lighting fixture) described in Patent Document 1 will be exemplified. The lighting device described in Patent Document 1 (hereinafter referred to as a conventional example) includes a plurality of light emitting devices. The plurality of light emitting devices include a substrate, a plurality of light emitting sections formed on the substrate, and a lens array arranged on the plurality of light emitting sections.

The lens array is an assembly of a plurality of lenses that correspond one-to-one to a plurality of light emitting sections. Each lens has the same shape and size and collects light emitted from the corresponding light emitting section.

JP 2017-50106 Publication

By the way, in the above conventional example, it is difficult to tilt and distribute the light emitted from the light emitting section in any direction.

An object of the present disclosure is to provide a lighting fixture that can tilt and distribute illumination light in any direction.

A lighting fixture according to one aspect of the present disclosure includes: an LED module in which a plurality of LEDs are arranged in at least one row and mounted on a board; and a light distribution control member that controls the distribution of illumination light emitted from the plurality of LEDs. , is provided. The light distribution control member has an entrance section provided on a surface facing the LED module. The incident section has a bottom portion facing the plurality of LEDs, and a pair of side walls protruding toward the LED module with the bottom portion interposed therebetween. The pair of side walls have an entrance surface on which the illumination light emitted from the LED is incident, and a total reflection surface that completely internally reflects the illumination light that enters from the entrance surface. The total reflection surfaces of the pair of side walls cause total internal reflection of the illumination light asymmetrically with respect to the optical axis of the LED.

The lighting fixture of the present disclosure has the advantage of being able to tilt and distribute illumination light in any direction.

FIG. 1 is a front perspective view of a lighting fixture according to an embodiment of the present disclosure. FIG. 2 is a perspective view of the lighting fixture seen from the rear. FIG. 3 is an exploded perspective view of the above lighting fixture. FIG. 4 is a front view of the same lighting fixture as above. FIG. 5 is a right side view of the lighting fixture same as above. FIG. 6 is a rear view of the above lighting fixture. FIG. 7 is a plan view of the above lighting fixture. FIG. 8 is a cross-sectional view of the main parts of the above lighting fixture. FIG. 9 is a rear view of the lens unit in the above lighting fixture. FIG. 10 is a partially omitted longitudinal cross-sectional view of the same lens unit as above. FIG. 11 is a partially omitted horizontal cross-sectional view of the same lens unit as above. FIG. 12 is a light distribution characteristic diagram of the above lighting fixture. FIG. 13 is a rear view of a lens unit in a modified lighting fixture. FIG. 14 is a partially omitted longitudinal cross-sectional view of the same lens unit as above. FIG. 15 is a partially omitted horizontal cross-sectional view of the same lens unit as above. FIG. 16 is a light distribution characteristic diagram of a lighting fixture according to a modification example of the same.

A lighting fixture according to an embodiment of the present disclosure will be described in detail with reference to the drawings. However, each figure described in the following embodiments is a schematic diagram, and the respective ratios of the sizes and thicknesses of each component do not necessarily reflect the actual size ratios. Note that the configuration described in the embodiments below is only an example of the present disclosure. The present disclosure is not limited to the following embodiments, and various changes can be made depending on the design etc. as long as the effects of the present disclosure can be achieved.

(1) Overview The lighting fixture A1 according to the embodiment includes an LED module 20 and a light distribution control member (lens unit B1). In the LED module 20, a plurality of LEDs 200 are arranged in at least one row and mounted on a substrate 201.

Lens unit B1 controls the light distribution of illumination light emitted from the plurality of LEDs 200. Lens unit B1 has an incident section 93 provided on a surface facing the LED module 20. The incidence section 93 has a bottom section 94 that faces the plurality of LEDs 200, and a pair of side walls 95 that protrude toward the LED module 20 with the bottom section 94 in between. The pair of side walls 95 has an entrance surface 950 on which the illumination light emitted from the LED 200 is incident, and a total reflection surface 951 that completely internally reflects the illumination light that enters from the entrance surface 950. The total reflection surfaces 951 of the pair of side walls 95 cause the illumination light to be totally internally reflected asymmetrically with respect to the optical axis L1 of the LED 200.

Thus, in the lighting fixture A1 according to the embodiment, the total internal reflection surfaces 951 of the pair of side walls 95 of the lens unit B1 cause the illumination light to be totally internally reflected asymmetrically with respect to the optical axis L1 of the LED 200, so that the illumination light can be arbitrarily reflected. The light can be distributed by tilting it in the direction of

(2) Details The lighting fixture A1 (hereinafter abbreviated as lighting fixture A1) according to the embodiment is used, for example, to irradiate an outdoor parking lot, a ground, etc. with illumination light. In the following description, unless otherwise specified, the vertical, longitudinal, and horizontal directions indicated by arrows in FIG. 1 are defined as the vertical, longitudinal, and horizontal directions of the lighting fixture A1.

The lighting fixture A1 includes a fixture body 1, a light source unit 2, a frame 3, an arm 4, a sealing member 5, a power supply unit 6, a power cable 7, a lens unit B1, and the like.

(2-1) Instrument Main Body The instrument main body 1 includes a housing section 10 that accommodates the power supply unit 6, and a flange section 11 that supports the light source unit 2 and lens unit B1 (see FIGS. 2 and 3).

The accommodating portion 10 is formed into a square box shape with an open front surface (see FIG. 3). A power supply unit 6 is attached to the inner bottom surface of the housing section 10. The power supply unit 6 includes, for example, a switching power supply circuit, and converts AC power supplied from the power system through the power cable 7 into DC power. The power cable 7 is pulled out to the rear of the housing part 10 from a hole penetrating the bottom of the housing part 10 (see FIGS. 2, 5, and 6). However, the power cable 7 is fixed to the outer bottom surface of the housing part 10 by a cable gland 14 (see FIG. 2). The cable gland 14 fixes the power cable 7 to the device main body 1 and seals the gap between the power cable 7 and the hole in the bottom of the accommodating part 10.

The flange portion 11 is formed in a rectangular frame shape when viewed from the front and back direction, and protrudes outward from the front end (opening end) of the housing portion 10 over the entire circumference. A protruding wall 13 that protrudes forward over the entire circumference is provided at the outer peripheral end of the flange portion 11 (see FIG. 3). Further, circular insertion holes 111 are provided at each of the four corners and the center of the four sides of the flange portion 11. Further, cylindrical female threaded portions 112 are provided at both ends of each of the four sides on the inner peripheral edge of the flange portion 11 (see FIGS. 2 and 3).

The accommodating portion 10, flange portion 11, and projecting wall 13 that constitute the instrument body 1 are integrally formed by drawing and bending a metal plate (for example, a pure aluminum plate).

(2-2) Light Source Unit The light source unit 2 includes an LED module 20 and a mounting plate 21 to which the LED module 20 is attached (see FIG. 3).

The LED module 20 includes a rectangular substrate 201 and a plurality of LEDs 200 mounted on the front surface of the substrate 201. Each of the plurality of LEDs 200 is a packaged white LED for illumination. The substrate 201 is, for example, a metal base substrate based on an aluminum plate. Since the substrate 201 is a metal base substrate, the heat generated by the plurality of LEDs 200 can be efficiently dissipated. Note that the plurality of LEDs 200 are mounted on the surface of the substrate 201 in a plurality of rows at substantially equal intervals along the vertical direction (vertical direction) and the horizontal direction (horizontal direction).

The mounting plate 21 is made of, for example, an aluminum plate and is formed into a rectangular flat plate shape. Note that the vertical (top and bottom) and horizontal (left and right) lengths of the mounting plate 21 are longer than the vertical and horizontal lengths of the substrate 201 of the LED module 20. Therefore, when the LED module 20 is screwed onto the front surface of the mounting plate 21, the peripheral portion of the mounting plate 21 protrudes around the LED module 20 (see FIG. 3). In addition, in the peripheral portion of the mounting plate 21 that protrudes around the LED module 20, one insertion hole is provided at both left and right ends of the upper and lower sides, respectively.

In the light source unit 2, the mounting screws 22, which are inserted one by one into a plurality of (four) insertion holes provided in the peripheral portion of the mounting plate 21, are screwed one by one into the four female threaded portions 112 of the flange portion 11. By doing so, it is screwed to the flange portion 11 (see FIG. 8).

(2-3) Frame The frame 3 includes a frame main body 30, a pair of attachment parts 31, and a protruding piece 32. Note that the frame main body 30, the pair of attachment parts 31, and the protruding pieces 32 that constitute the frame 3 are integrally formed by punching and bending a metal plate (for example, a plate made of pure aluminum).

The frame body 30 includes an upper side plate 301 serving as an upper window frame, a lower side plate 302 serving as a lower window frame, a left side plate 303 serving as a left window frame, and a right side plate 304 serving as a right window frame. have. The upper side plate 301 and the lower side plate 302 are formed in the shape of a narrow band and are arranged so that the thickness direction is along the up-down direction. Further, the left side plate 303 and the right side plate 304 are formed in the shape of narrow strips, and are arranged so that the thickness direction runs along the left-right direction. The left and right ends of the upper plate 301 are connected to the upper ends of the left side plate 303 and the right side plate 304, and the left and right ends of the lower side plate 302 are connected to the lower ends of the left side plate 303 and the right side plate 304, respectively. Thus, the frame body 30 has a window 300 whose window frame is an upper side plate 301, a lower side plate 302, a left side plate 303, and a right side plate 304. Note that one hidden portion 33 is formed at each end of the upper plate 301 in the longitudinal direction (left and right direction) (see FIG. 7). These two hidden portions 33 are formed in a trapezoidal shape and protrude from the rear ends of both ends of the upper plate 301 in the longitudinal direction.

The protruding piece 32 is formed in a rectangular frame shape when viewed from the front and back direction, and protrudes toward the window 300 from the front ends of the upper side plate 301, the lower side plate 302, the left side plate 303, and the right side plate 304. One insertion hole 320 is provided at each of the four corners and the longitudinal center of each of the four sides of the projecting piece 32 (see FIG. 3).

The pair of attachment parts 31 are formed into a trapezoid shape, and are integrally formed with the frame body 30 so as to protrude rearward from the rear ends of the lower parts (portions below the center in the vertical direction) of the left side plate 303 and the right side plate 304, respectively. (See Figures 3 and 5). One nut 81 is fixed to the lower part of each of the pair of attachment parts 31 (see FIGS. 3 and 6). Each nut 81 is a caulking nut (also called a pierce nut or a rivet nut), and is caulked and fixed into a through hole provided in the mounting portion 31 .

(2-4) Arm The arm 4 includes a fixed part 40 and a pair of arm parts 41. The fixing part 40 and the pair of arm parts 41 are integrally formed by punching and bending a metal plate (for example, a pure aluminum plate).

The fixing portion 40 is formed into a trapezoidal flat plate shape (see FIG. 7). The fixing part 40 is provided with three circular mounting holes 400 arranged in a row. For example, anchor bolts embedded in a concrete pedestal or the like are inserted one by one into these three mounting holes 400, and a nut is tightened on each anchor bolt, thereby fixing the fixing part 40 to the object to be fixed (pedestal). be done.

The pair of arm portions 41 are formed into a substantially L-shape and protrude obliquely upward and rearward from a pair of oblique sides (sides corresponding to legs of a trapezoid) of the fixing portion 40 . One through hole 410 is provided in each of the distal end portions of the pair of arm portions 41 (see FIG. 3).

The arm 4 is attached to the frame 3 with two bolts 80. Specifically, the bolts 80 inserted into the insertion holes 410 of each arm part 41 are screwed into the nuts 81 fixed to each mounting part 31 of the frame 3, so that each arm part 41 rotates to each mounting part 31. (See Figures 4-7).

(2-5) Seal Member The seal member 5 is made of silicone rubber and is formed into a rectangular frame shape when viewed from the front and rear directions (see FIG. 3). However, the seal member 5 may be formed of an elastic material other than silicone rubber.

The seal member 5 has a first seal portion 51 and a second seal portion 52 (see FIG. 8). Both the first seal part 51 and the second seal part 52 are formed in a rectangular frame shape. The outer peripheral end of the first seal part 51 and the outer peripheral end of the second seal part 52 are connected by a connecting part 53 formed in a rectangular frame shape. That is, inside the seal member 5, a groove 54 that is surrounded by the first seal part 51, the second seal part 52, and the connecting part 53 and is open to the inner peripheral surface is formed over the entire circumference of the seal member 5 ( (See Figure 8).

Two ribs 55 are formed on the front and rear surfaces of the first seal portion 51 over the entire circumference (see FIG. 8). Similarly, two ribs 55 are formed on the front and rear surfaces of the second seal portion 52 over the entire circumference. Furthermore, one screw insertion groove 56 is provided at both ends and the center of the seal member 5 in the vertical and horizontal directions (see FIG. 3).

(2-6) Lens Unit The lens unit B1 includes a unit main body 90, a peripheral portion 91, and a plurality of lenses 92 (see FIGS. 9 to 11). Note that FIG. 9 shows a rear view of the lens unit B1. FIG. 10 shows a partially omitted vertical (vertical) cross-sectional view of the light source unit 2. As shown in FIG. FIG. 11 shows a partially omitted lateral (horizontal) cross-sectional view of the light source unit 2. As shown in FIG.

The unit main body 90, the peripheral portion 91, and the plurality of lenses 92 are integrally formed of a synthetic resin material (for example, polycarbonate resin or acrylic resin) having translucency.

The unit main body 90 is formed into a square tray shape. The outer bottom surface (front surface) of the unit main body 90 is a flat surface, and a plurality of lenses 92 are formed on the inner bottom surface of the unit main body 90. That is, the front surface of the unit main body 90 is a plane located on the opposite side to the facing surface (rear surface) facing the LED module 20, and is an output surface 900 from which illumination light whose distribution has been controlled by the plurality of lenses 92 is emitted. be.

The plurality of lenses 92 correspond to the plurality of LEDs 200 of the LED module 20 on a one-to-one basis. That is, the light distribution of light emitted from each LED 200 is controlled by each lens 92 that corresponds one-to-one with each LED 200.

The peripheral edge part 91 protrudes from the peripheral edge of the unit main body 90 over the entire circumference. One semicircular screw insertion groove 910 is provided at the center in the left-right direction of both the upper and lower ends of the peripheral edge portion 91, and at the center in the vertical direction of both left and right ends of the peripheral edge portion 91 (see FIG. 3).

Each of the plurality of lenses 92 has an entrance section 93. The incidence part 93 has a bottom part 94 facing the LED 200, and a pair of side walls 95 that protrude toward the LED module 20 with the bottom part 94 in between (see FIG. 10). However, the pair of side walls 95 are connected in the longitudinal direction (left-right direction) to each of the plurality of lenses 92 that are lined up in a row in the horizontal direction (left-right direction) (see FIG. 9).

The bottom portion 94 is provided between a pair of side walls 95 (see FIGS. 9-11). The bottom portion 94 is curved in an arc shape when viewed from above and below (see FIG. 11).

The pair of side walls 95 have an entrance surface 950 and a total reflection surface 951 (see FIG. 10). However, the pair of side walls 95 are formed in an asymmetrical shape (see FIG. 10).

The entrance surface 950 is a surface on which illumination light emitted from the LED 200 is incident. However, the incident surfaces 950 of the pair of side walls 95 have different inclination angles with respect to the optical axis L1 of the LED 200. For example, in the embodiment, the angle of inclination of the entrance surface 950 of the upper side wall 95 of the pair of side walls 95 is smaller than the angle of inclination of the entrance surface 950 of the lower side wall 95.

The total reflection surface 951 is a surface that completely internally reflects the illumination light that enters from the entrance surface 950. Note that each total reflection surface 951 of the pair of side walls 95 is a plane inclined with respect to the optical axis L1. Furthermore, the respective total reflection surfaces 951 of the pair of side walls 95 have different inclination angles with respect to the optical axis L1 (see FIG. 10). For example, in the embodiment, the inclination angle of the total reflection surface 951 of the upper side wall 95 of the pair of side walls 95 is larger than the inclination angle of the total reflection surface 951 of the lower side wall 95 (see FIG. 10).

(2-7) Assembling the lighting fixture Next, the procedure for assembling the lighting fixture A1 will be explained. However, the assembly procedure described below is an example, and the order of some procedures may be changed.

First, a worker who performs the assembly work attaches the power supply unit 6 to the inner bottom surface of the accommodating portion 10 of the instrument main body 1, and then electrically connects the power cable 7 to the power supply unit 6. Then, the operator pulls the power cable 7 out of the housing part 10 from the hole penetrating the bottom of the housing part 10, and fixes the power cable 7 to the outer bottom surface of the housing part 10 using the cable gland 14.

Next, the operator inserts the mounting screws 22 one by one into the four insertion holes provided in the mounting plate 21 of the light source unit 2, and inserts these four mounting screws 22 into the four female threads of the flange portion 11. The light source unit 2 is screwed to the flange portion 11 by screwing them into the portions 112 one by one. Note that before screwing the light source unit 2 to the flange portion 11, the operator electrically connects the output wire drawn out from the power supply unit 6 to the connector mounted on the board 201 of the LED module 20. do.

Subsequently, the operator attaches the seal member 5 to the peripheral edge 91 of the unit body 90 by inserting the peripheral edge 91 into the groove 54 of the seal member 5 . Then, the operator places the lens unit B1 equipped with the seal member 5 on the front surface of the flange portion 11, and then covers the frame 3 over the seal member 5 from the front.

Then, the operator inserts one mounting bolt 34 from the front into each of the plurality (eight) insertion holes 320 of the projecting piece 32 and the plurality (eight) insertion holes 111 of the flange portion 11. The operator fixes the frame 3 to the flange part 11 of the instrument main body 1 by tightening two mounting nuts 35 onto each of the mounting bolts 34 inserted into each insertion hole 111 of the flange part 11 (see FIG. 8).

Finally, the operator inserts the bolts 80 one by one into the insertion holes 410 of the pair of arm parts 41, and screws the bolts 80 one by one into each nut 81 fixed to the pair of mounting parts 31. Attach arm 4 to frame 3.

The above procedure completes the assembly work of the lighting fixture A1.

(2-8) Light distribution characteristics of lighting fixture Next, the light distribution characteristics of lighting fixture A1 will be explained with reference to FIG. In FIG. 12, 0° is the direction of the optical axis L1 of the LED 200. The direction from 0° to plus 90° counterclockwise is an upward direction from the optical axis L1, and the direction from 0° to minus 90° clockwise is a downward direction from the optical axis L1. The position of the origin O is the position of the LED 200, and the distance from the origin O (radius of concentric circles) indicates the brightness (luminous intensity [cd]).

In FIG. 12, the solid line α1 indicates the light distribution characteristic in the vertical direction (vertical direction) plane including the optical axis L1, and the broken line β1 indicates the light distribution characteristic in the horizontal direction (horizontal direction) plane including the optical axis L1. There is. As shown by the solid line α1, the vertical light distribution characteristic has a peak of luminous intensity (beam) in a direction approximately 24° above the optical axis L1. On the other hand, as shown by the broken line β1, the light distribution characteristic in the lateral direction has peaks in luminous intensity in the direction of the optical axis L1 and in directions approximately 54° left and right from the optical axis L1.

(3) Modification Next, a modification of the lighting fixture A1 according to the embodiment will be described. However, the lighting fixture A1 of the modified example is characterized by the lens unit B2, and the configuration other than the lens unit B2 is common to the lighting fixture A1 according to the embodiment. Therefore, in the following description of the lighting fixture A1 of the modified example, the same components as those of the lighting fixture A1 according to the embodiment are given the same reference numerals, and illustrations and descriptions thereof will be omitted as appropriate.

Like lens unit B1, lens unit B2 includes a unit main body 90, a peripheral portion 91, and a plurality of lenses 96 (see FIGS. 13 to 15). Note that FIG. 13 shows a rear view of the lens unit B2. FIG. 14 shows a partially omitted vertical (vertical) sectional view of the light source unit 2. As shown in FIG. FIG. 15 shows a partially omitted lateral (horizontal) sectional view of the light source unit 2. As shown in FIG.

The plurality of lenses 96 correspond to the plurality of LEDs 200 of the LED module 20 on a one-to-one basis. That is, the light distribution of light emitted from each LED 200 is controlled by each lens 96 that corresponds one-to-one with each LED 200.

Each of the plurality of lenses 96 has an entrance section 960. The incidence part 960 has a bottom part 961 facing the LED 200, and a pair of side walls 962 that protrude toward the LED module 20 with the bottom part 961 in between (see FIG. 14). However, the pair of side walls 962 are connected in the longitudinal direction (horizontal direction) to each of the plurality of lenses 96 that are lined up in a row in the horizontal direction (horizontal direction) among the plurality of lenses 96 (see FIG. 13).

The bottom portion 961 is provided between a pair of side walls 962 (see FIGS. 13-15). The bottom portion 961 is inclined in the front-rear direction when viewed from the left-right direction (see FIG. 14).

The pair of side walls 962 have an entrance surface 963 and a total reflection surface 964 (see FIG. 14). However, the pair of side walls 962 are formed in an asymmetrical shape (see FIG. 14).

The respective incident surfaces 963 of the pair of side walls 962 have different inclination angles with respect to the optical axis L1 of the LED 200. For example, in the modified example, the angle of inclination of the entrance surface 963 of the upper side wall 962 of the pair of side walls 962 is smaller than the angle of inclination of the entrance surface 963 of the lower side wall 962.

Each total reflection surface 964 of the pair of side walls 962 is a plane inclined with respect to the optical axis L1. Furthermore, the total reflection surfaces 964 of the pair of side walls 962 have different inclination angles with respect to the optical axis L1 (see FIG. 14). For example, in the modified example, the inclination angle of the total reflection surface 964 of the upper side wall 962 of the pair of side walls 962 is larger than the inclination angle of the total reflection surface 964 of the lower side wall 962 (see FIG. 14).

FIG. 16 shows the light distribution characteristics of a modified lighting fixture A1. In FIG. 16, 0° is the direction of the optical axis L1 of the LED 200. The direction from 0° to plus 90° counterclockwise is an upward direction from the optical axis L1, and the direction from 0° to minus 90° clockwise is a downward direction from the optical axis L1. The position of the origin O is the position of the LED 200, and the distance from the origin O (radius of concentric circles) indicates the brightness (luminous intensity [cd]).

In FIG. 16, the solid line α2 indicates the light distribution characteristic in the vertical direction (vertical direction) plane including the optical axis L1, and the broken line β2 indicates the light distribution characteristic in the horizontal direction (horizontal direction) plane including the optical axis L1. There is. As shown by the solid line α2, the vertical light distribution characteristic has a peak of luminous intensity (beam) in a direction approximately 22° above the optical axis L1. On the other hand, as indicated by the broken line β2, the light distribution characteristic in the lateral direction has peaks in luminous intensity in directions approximately 10 degrees left and right from the optical axis L1.

Compared to the light distribution characteristics in the embodiment, the light distribution characteristics in the modified example have a narrower light distribution angle in the horizontal direction (horizontal direction) and a wider light distribution angle in the vertical direction (vertical direction).

(4) Advantages of the Embodiment As described above, in the lighting fixture A1, the lens units B1 and B2 have the entrance portions 93 and 960 provided on the surface facing the LED module 20. The entrance portion 93; 960 has a bottom portion 94; 961 that faces the plurality of LEDs 200, and a pair of side walls 95; 962 that protrude toward the LED module 20 with the bottom portion 94; 961 in between. The pair of side walls 95; 962 has an entrance surface 950; 963 on which the illumination light emitted from the LED 200 is incident, and a total reflection surface 951; 964 that totally internally reflects the illumination light incident from the entrance surface 950; 963. . The total reflection surfaces 951; 964 of the pair of side walls 95; 962 cause the illumination light to be totally internally reflected asymmetrically with respect to the optical axis L1 of the LED 200.

Therefore, in the lighting fixture A1, the illumination light is totally internally reflected asymmetrically with respect to the optical axis L1 of the LED 200 by the total reflection surfaces 951 and 964 of the pair of side walls 95 and 962 of the lens units B1 and B2. can be tilted in any direction to distribute light.

Further, the lens units B1 and B2 (light distribution control members) have a protection function of protecting the light source unit 2 in addition to a light distribution control function of controlling the light distribution of the LED module 20. In other words, the lighting fixture A1 has a light distribution control function and a protection function for the light source unit 2 in one part (lens units B1; B2), so the number of parts is reduced and the workability of the assembly work is improved. can be achieved.

Furthermore, since the pair of side walls 95; 962 of the lighting fixture A1 have an asymmetrical shape, it is easily possible to cause the illumination light to be totally internally reflected asymmetrically with respect to the optical axis L1. Furthermore, in the lighting fixture A1, since the incident surfaces 950 and 963 of each of the pair of side walls 95 and 962 are planes having different angles of inclination with respect to the optical axis L1, light distribution characteristics tilted in any direction can be easily realized. be able to. Furthermore, in the lighting fixture A1, since the total reflection surfaces 951 and 964 of the pair of side walls 95 and 962 are planes tilted with respect to the optical axis L1, light distribution characteristics tilted in any direction can be more easily realized. can do.

Here, in the lens unit B1; B2, the bottom portion 94; 961 is asymmetrical with respect to the optical axis L1 (see FIGS. 10 and 14). That is, the center of the bottom portion 94; 961 is shifted from the optical axis L1 in the vertical direction. Therefore, the lighting fixture A1 can more easily realize light distribution characteristics tilted in any direction.

In addition, since the light emitting surface 900, which is the front surface of the lens unit B1;B2 (the surface opposite to the surface facing the LED module 20) of the lighting fixture A1, is a flat surface, the appearance can be improved. .

(5) Summary The lighting fixture (A1) according to the first aspect of the present disclosure includes an LED module (20) in which a plurality of LEDs (200) are arranged in at least one row and mounted on a substrate (201); A light distribution control member (lens unit B1; B2) that controls the light distribution of illumination light emitted from (200) is provided. The light distribution control member has an incident part (93; 960) provided on a surface facing the LED module (20). The incidence part (93; 960) includes a bottom part (94; 961) facing the plurality of LEDs (200), and a pair of side walls (95; ;962). The pair of side walls (95; 962) includes an entrance surface (950; 963) on which the illumination light emitted from the LED (200) is incident, and a total internal reflection of the illumination light that enters from the entrance surface (950; 963). It has a reflective surface (951; 964). The total reflection surfaces (951; 964) of the pair of side walls (95; 962) cause the illumination light to be totally internally reflected asymmetrically with respect to the optical axis (L1) of the LED (200).

The lighting fixture (A1) according to the first aspect uses the total reflection surfaces (951; 964) of the pair of side walls (95; 962) of the light distribution control member to Since the illumination light is totally internally reflected asymmetrically, the illumination light can be tilted and distributed in any direction.

The lighting fixture (A1) according to the second aspect of the present disclosure can be realized in combination with the first aspect. In the lighting fixture (A1) according to the second aspect, it is preferable that the pair of side walls (95; 962) have an asymmetrical shape.

In the lighting fixture (A1) according to the second aspect, since the pair of side walls (95; 962) have an asymmetrical shape, it is easy to completely internally reflect illumination light asymmetrically with respect to the optical axis (L1). It is possible.

The lighting fixture (A1) according to the third aspect of the present disclosure can be realized in combination with the second aspect. In the lighting fixture (A1) according to the third aspect, each of the incident surfaces (950; 963) of the pair of side walls (95; 962) is preferably a plane having different inclination angles with respect to the optical axis (L1).

The lighting fixture (A1) according to the third aspect can easily realize light distribution characteristics tilted in any direction.

The lighting fixture (A1) according to the fourth aspect of the present disclosure can be realized in combination with any one of the first to third aspects. In the lighting fixture (A1) according to the fourth aspect, each total reflection surface (951; 964) of the pair of side walls (95; 962) is preferably a plane inclined with respect to the optical axis (L1). .

The lighting fixture (A1) according to the fourth aspect can more easily realize light distribution characteristics tilted in any direction.

The lighting fixture (A1) according to the fifth aspect of the present disclosure can be realized in combination with any one of the first to fourth aspects. In the lighting fixture (A1) according to the fifth aspect, the bottom (94; 961) is preferably asymmetric with respect to the optical axis (L1).

The lighting fixture (A1) according to the fifth aspect can more easily realize light distribution characteristics tilted in any direction.

The lighting fixture (A1) according to the sixth aspect of the present disclosure can be realized in combination with any one of the first to fifth aspects. In the lighting fixture (A1) according to the sixth aspect, it is preferable that the output surface (900) on the opposite side to the facing surface of the light distribution control member is a flat surface.

The lighting fixture (A1) according to the sixth aspect can improve the appearance.

A1 Lighting equipment B1; B2 Lens unit (light distribution control member)
L1 Optical axis 1 Instrument body 20 LED module 93 Incident part 94 Bottom 95 Side wall 200 LED
201 Substrate 900 Output surface 950 Incident surface 951 Total reflection surface 960 Incident part 961 Bottom 962 Side wall 963 Incident surface 964 Total reflection surface

Claims (6)

an LED module in which a plurality of LEDs are arranged in at least one row and mounted on a board;
a light distribution control member that controls the distribution of illumination light emitted from the plurality of LEDs;
Equipped with
The light distribution control member has an incident part provided on a surface facing the LED module,
The incidence part has a bottom part facing the plurality of LEDs, and a pair of side walls protruding toward the LED module with the bottom part in between,
The pair of side walls have an incident surface on which the illumination light emitted from the LED is incident, and a total reflection surface that totally internally reflects the illumination light incident from the incident surface,
The total reflection surfaces of the pair of side walls cause total internal reflection of the illumination light asymmetrically with respect to the optical axis of the LED.
lighting equipment. the pair of side walls have an asymmetrical shape;
The lighting fixture according to claim 1. The incident surfaces of each of the pair of side walls are planes having different inclination angles with respect to the optical axis.
The lighting fixture according to claim 2. The total reflection surface of each of the pair of side walls is a plane inclined with respect to the optical axis.
The lighting fixture according to any one of claims 1 to 3. the bottom portion is asymmetrical with respect to the optical axis;
The lighting fixture according to any one of claims 1 to 4. an output surface of the light distribution control member opposite to the opposing surface is a flat surface;
The lighting fixture according to any one of claims 1 to 5.

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