lighting fixtures

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

[Technical Field]

[0001] The present disclosure relates to a lighting fixture, and more particularly to a lighting fixture including a member for controlling light distribution. [Background technology]

[0002] As a conventional example, the lighting device (lighting fixture) described in Patent Document 1 is exemplified. The lighting device described in Patent Document 1 (hereinafter referred to as the conventional example) has a plurality of light-emitting devices. The plurality of light-emitting devices each have a substrate, a plurality of light-emitting units formed on the substrate, and a lens array arranged on the plurality of light-emitting units.

[0003] The lens array is a collection of lenses that correspond one-to-one to the light-emitting elements. Each lens has the same shape and size and focuses the light emitted from the corresponding light-emitting element. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-50106 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above-mentioned conventional example, it is difficult to tilt and distribute the light emitted from the light emitting portion in any direction.

[0006] An object of the present disclosure is to provide a lighting fixture that can tilt and distribute illumination light in any direction. [Means for solving the problem]

[0007] The lighting fixture according to one embodiment of the present disclosure includes a plurality of LEDs. Multi-columnThe light distribution control member includes an LED module mounted on a substrate in a line, and a light distribution control member that controls the light distribution of illumination light emitted from the LEDs. The light distribution control member has an incident portion provided on a surface facing the LED module. The incident portion has a bottom portion facing the LEDs and a pair of side walls that protrude toward the LED module with the bottom portion sandwiched between them. The pair of side walls have an incident surface onto which the illumination light emitted from the LEDs is incident, and a total reflection surface that internally and totally reflects the illumination light incident from the incident surface. Moreover, it has an asymmetrical shape. The total reflection surfaces of the pair of side walls are a plane inclined with respect to the optical axis of the LED, The illumination light is totally internally reflected asymmetrically with respect to the optical axis. The inclination angle of the total reflection surface of the upper side wall of the pair of side walls is larger than the inclination angle of the total reflection surface of the lower side wall. [Effects of the Invention]

[0008] The lighting fixture of the present disclosure has the advantage of being able to tilt and distribute illumination light in any direction. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a front perspective view of a lighting fixture according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a perspective view of the lighting fixture as viewed from behind. [Figure 3] FIG. 3 is an exploded perspective view of the lighting fixture. [Figure 4] FIG. 4 is a front view of the lighting fixture. [Figure 5] FIG. 5 is a right side view of the lighting fixture. [Figure 6] FIG. 6 is a rear view of the lighting fixture. [Figure 7] FIG. 7 is a plan view of the lighting fixture. [Figure 8] FIG. 8 is a cross-sectional view of a main part of the lighting fixture. [Figure 9] FIG. 9 is a rear view of the lens unit in the lighting fixture. [Figure 10] FIG. 10 is a vertical cross-sectional view of the lens unit, with a portion thereof omitted. [Figure 11] FIG. 11 is a cross-sectional view of the lens unit taken along the horizontal direction, with a portion of the lens unit omitted. [Figure 12] FIG. 12 is a diagram showing the light distribution characteristics of the above lighting fixture. [Figure 13] FIG. 13 is a rear view of the lens unit in the lighting fixture of the modified example. [Figure 14] FIG. 14 is a vertical cross-sectional view of the lens unit, with a portion thereof omitted. [Figure 15] FIG. 15 is a cross-sectional view of the lens unit taken along the horizontal direction, with a portion of the lens unit omitted. [Figure 16] FIG. 16 is a diagram showing the light distribution characteristics of the lighting fixture of the above modification. DETAILED DESCRIPTION OF THE INVENTION

[0010] A lighting device according to an embodiment of the present disclosure will be described in detail with reference to the drawings. However, the drawings described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components do not necessarily reflect the actual dimensional ratios. Note that the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0011] (1) Overview The lighting fixture A1 according to this embodiment includes an LED module 20 and a light distribution control member (lens unit B1). The LED module 20 has a plurality of LEDs 200 mounted on a substrate 201 and arranged in at least one row.

[0012] The lens unit B1 controls the light distribution of illumination light emitted from the multiple LEDs 200. The lens unit B1 has an incident portion 93 provided on a surface facing the LED module 20. The incident portion 93 has a bottom 94 facing the multiple LEDs 200 and a pair of side walls 95 that protrude toward the LED module 20 with the bottom 94 sandwiched between them. The pair of side walls 95 have an incident surface 950 onto which the illumination light emitted from the LEDs 200 is incident, and total reflection surfaces 951 that internally and totally reflect the illumination light incident from the incident surface 950. The total reflection surfaces 951 of the pair of side walls 95 internally and totally reflect the illumination light asymmetrically with respect to the optical axis L1 of the LEDs 200.

[0013] Therefore, in the lighting fixture A1 of the embodiment, the total internal reflection of the illumination light is performed asymmetrically with respect to the optical axis L1 of the LED 200 by the total reflection surfaces 951 of the pair of side walls 95 of the lens unit B1, so that the illumination light can be tilted and distributed in any direction.

[0014] (2)Details A lighting fixture A1 according to this embodiment (hereinafter simply referred to as lighting fixture A1) is used to irradiate, for example, outdoor parking lots, playgrounds, etc. In the following description, unless otherwise specified, the up / down, front / back, and left / right directions indicated by arrows in Fig. 1 are defined as the up / down, front / back, and left / right directions of lighting fixture A1.

[0015] 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.

[0016] (2-1) Device body The fixture body 1 has a housing portion 10 that houses the power supply unit 6, and a flange portion 11 that supports the light source unit 2 and the lens unit B1 (see FIGS. 2 and 3).

[0017] The housing 10 is formed in the shape of a square box with an open front (see FIG. 3). A power supply unit 6 is attached to the inner bottom surface of the housing 10. The power supply unit 6 includes, for example, a switching power supply circuit, and converts AC power supplied from a power grid through a power cable 7 into DC power. The power cable 7 is drawn out to the rear of the housing 10 from a hole penetrating the bottom of the housing 10 (see FIGS. 2, 5, and 6). However, the power cable 7 is fixed to the outer bottom surface of the housing 10 by a cable gland 14 (see FIG. 2). The cable gland 14 fixes the power cable 7 to the appliance body 1 and seals the gap between the power cable 7 and the hole in the bottom of the housing 10.

[0018] The flange portion 11 is formed in a rectangular frame shape when viewed from the front-to-rear direction, and protrudes outward all around from the front end (open end) of the housing portion 10. A protruding wall 13 protruding forward all around is provided at the outer peripheral end of the flange portion 11 (see FIG. 3). Circular insertion holes 111 are provided at the four corners and in the centers of the four sides of the flange portion 11. Furthermore, cylindrical female threads 112 are provided at both ends of each of the four sides of the inner peripheral edge of the flange portion 11 (see FIGS. 2 and 3).

[0019] The housing portion 10, flange portion 11 and projecting wall 13 that constitute the device body 1 are integrally formed by drawing and bending a metal plate (for example, a plate material made of pure aluminum).

[0020] (2-2) Light source unit The light source unit 2 has an LED module 20 and a mounting plate 21 to which the LED module 20 is attached (see FIG. 3).

[0021] 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 lighting. The substrate 201 is, for example, a metal-based substrate made of an aluminum plate. Since the substrate 201 is a metal-based substrate, heat generated by the plurality of LEDs 200 can be efficiently dissipated. The plurality of LEDs 200 are mounted on the surface of the substrate 201 in multiple rows aligned at approximately equal intervals in the vertical direction (up and down direction) and horizontal direction (left and right direction).

[0022] The mounting plate 21 is formed, for example, from an aluminum plate into a rectangular flat plate. The vertical (top-bottom) and horizontal (left-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 to the front surface of the mounting plate 21, a peripheral portion of the mounting plate 21 protrudes from the periphery of the LED module 20 (see FIG. 3). The peripheral portion of the mounting plate 21 protruding from the periphery of the LED module 20 has one insertion hole at each of the left and right ends on the upper and lower sides.

[0023] The light source unit 2 is screwed to the flange portion 11 by inserting mounting screws 22, one each into multiple (four) insertion holes provided in the peripheral portion of the mounting plate 21, and screwing the mounting screws 22 into four female thread portions 112 of the flange portion 11, one each (see Figure 8).

[0024] (2-3) Frame The frame 3 has a frame body 30, a pair of mounting portions 31, and protruding pieces 32. The frame body 30, the pair of mounting portions 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 material made of pure aluminum).

[0025] The frame body 30 has an upper plate 301 that forms the upper window frame, a lower plate 302 that forms the lower window frame, a left plate 303 that forms the left window frame, and a right plate 304 that forms the right window frame. The upper plate 301 and the lower plate 302 are formed as narrow strips and are arranged so that their thicknesses run along the vertical direction. The left plate 303 and the right plate 304 are also formed as narrow strips and are arranged so that their thicknesses run along the horizontal direction. The left and right ends of the upper plate 301 are connected to the upper ends of the left plate 303 and the right plate 304, respectively, and the left and right ends of the lower plate 302 are connected to the lower ends of the left plate 303 and the right plate 304, respectively. Thus, the frame body 30 has a window 300 whose window frame is made up of the upper plate 301, the lower plate 302, the left plate 303, and the right plate 304. A hidden portion 33 is formed at each end in the longitudinal direction (left-right direction) of the upper plate 301 (see FIG. 7). These two hidden portions 33 are formed in a trapezoidal shape and protrude from the rear ends of both ends in the longitudinal direction of the upper plate 301.

[0026] The protrusion 32 is formed in a rectangular frame shape when viewed from the front-to-rear direction, and protrudes from the front ends of the upper plate 301, lower plate 302, left plate 303, and right plate 304 toward the window 300. One insertion hole 320 is provided at each of the four corners of the protrusion 32 and at the center of each of the four sides in the longitudinal direction (see FIG. 3).

[0027] The pair of mounting portions 31 are formed in a trapezoidal shape and are formed integrally with the frame body 30 so as to protrude rearward from the rear ends of the lower portions (portions below the center in the vertical direction) of the left side plate 303 and the right side plate 304 (see FIGS. 3 and 5). One nut 81 is fixed to the lower portion of each of the pair of mounting portions 31 (see FIGS. 3 and 6). Each nut 81 is a crimp nut (also called a pierce nut or a rivet nut) and is fixed by crimping into a through-hole provided in the mounting portion 31.

[0028] (2-4) Arm The arm 4 has a fixed portion 40 and a pair of arm portions 41. The fixed portion 40 and the pair of arm portions 41 are integrally formed by punching and bending a metal plate (for example, a plate material made of pure aluminum).

[0029] The fixing part 40 is formed in the shape of a trapezoidal flat plate (see FIG. 7). Three circular mounting holes 400 are provided in the fixing part 40 so that they are aligned in a row. For example, anchor bolts embedded in a concrete base or the like are inserted into each of the three mounting holes 400, and fixing part 40 is fixed to the object (base) by tightening nuts on each anchor bolt.

[0030] The pair of arm portions 41 are formed in a substantially L-shape and protrude obliquely upward and rearward from a pair of oblique sides (sides corresponding to the legs of the trapezoid) of the fixed portion 40. An insertion hole 410 is provided at each end of the pair of arm portions 41 (see FIG. 3).

[0031] The arm 4 is attached to the frame 3 with two bolts 80. More specifically, the bolts 80 are inserted into the insertion holes 410 of each arm portion 41 and screwed into nuts 81 fixed to the mounting portions 31 of the frame 3, thereby rotatably attaching each arm portion 41 to the mounting portions 31 (see FIGS. 4 to 7).

[0032] (2-5) Sealing material The sealing member 5 is made of silicone rubber and has a rectangular frame shape when viewed from the front-rear direction (see FIG. 3). However, the sealing member 5 may be made of an elastic material other than silicone rubber.

[0033] The seal member 5 has a first seal portion 51 and a second seal portion 52 (see FIG. 8). The first seal portion 51 and the second seal portion 52 are both formed in a rectangular frame shape. The outer peripheral end of the first seal portion 51 and the outer peripheral end of the second seal portion 52 are connected by a connecting portion 53 also formed in a rectangular frame shape. In other words, inside the seal member 5, a groove 54 is formed around the entire circumference of the seal member 5, surrounded by the first seal portion 51, the second seal portion 52, and the connecting portion 53, and opening onto the inner peripheral surface (see FIG. 8).

[0034] Two ribs 55 are formed around the entire periphery on the front and rear surfaces of the first seal portion 51 (see FIG. 8). Similarly, two ribs 55 are formed around the entire periphery on the front and rear surfaces of the second seal portion 52. Also, one screw insertion groove 56 is provided at each end and center of the seal member 5 in the vertical and horizontal directions (see FIG. 3).

[0035] (2-6) Lens unit The lens unit B1 has a unit body 90, a peripheral portion 91, and a plurality of lenses 92 (see FIGS. 9-11). FIG. 9 shows a rear view of the lens unit B1. FIG. 10 shows a vertical (up-down) cross-sectional view of the light source unit 2 with a portion omitted. FIG. 11 shows a horizontal (left-right) cross-sectional view of the light source unit 2 with a portion omitted.

[0036] The unit body 90, the peripheral edge portion 91, and the plurality of lenses 92 are integrally formed from a light-transmitting synthetic resin material (for example, polycarbonate resin or acrylic resin).

[0037] The unit body 90 is formed in the shape of a square tray. The outer bottom surface (front surface) of the unit body 90 is flat, and a plurality of lenses 92 are formed on the inner bottom surface of the unit body 90. In other words, the front surface of the unit body 90 is a flat surface located opposite to the opposing surface (rear surface) that faces the LED module 20, and is an emission surface 900 from which illumination light whose light distribution has been controlled by the plurality of lenses 92 is emitted.

[0038] The lenses 92 correspond one-to-one to the LEDs 200 of the LED module 20. That is, the distribution of light emitted from each LED 200 is controlled by each lens 92 corresponding one-to-one to each LED 200.

[0039] The peripheral edge portion 91 protrudes all around from the periphery of the unit body 90. A 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 up-down direction of both the left and right ends of the peripheral edge portion 91 (see FIG. 3).

[0040] Each of the lenses 92 has an incident portion 93. The incident portion 93 has a bottom portion 94 facing the LED 200 and a pair of side walls 95 that protrude toward the LED module 20 with the bottom portion 94 sandwiched between them (see FIG. 10). However, the pair of side walls 95 is connected in the longitudinal direction (left-right direction) to each of the lenses 92 that are lined up in a row in the horizontal direction (left-right direction) among the lenses 92 (see FIG. 9).

[0041] The bottom portion 94 is provided between a pair of side walls 95 (see FIGS. 9 to 11). The bottom portion 94 is curved in an arc shape when viewed from above and below (see FIG. 11).

[0042] The pair of side walls 95 has an incident surface 950 and a total reflection surface 951 (see FIG. 10). However, the pair of side walls 95 are formed in an asymmetric shape (see FIG. 10).

[0043] The incident surface 950 is a surface onto 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 inclination angle of the incident surface 950 of the upper side wall 95 of the pair of side walls 95 is smaller than the inclination angle of the incident surface 950 of the lower side wall 95.

[0044] Total reflection surface 951 is a surface that internally and totally reflects illumination light incident from incident surface 950. Each total reflection surface 951 of the pair of side walls 95 is a flat surface inclined with respect to optical axis L1. Each total reflection surface 951 of the pair of side walls 95 has a different inclination angle with respect to optical axis L1 (see FIG. 10). For example, in the embodiment, the inclination angle of total reflection surface 951 of the upper side wall 95 of the pair of side walls 95 is larger than the inclination angle of total reflection surface 951 of the lower side wall 95 (see FIG. 10).

[0045] (2-7) Assembly of lighting fixtures Next, the procedure for assembling the lighting device A1 will be described. However, the assembly procedure described below is only an example, and the order of some steps may be changed.

[0046] First, the worker performing the assembly work attaches the power supply unit 6 to the inner bottom surface of the housing portion 10 of the device main body 1, and then electrically connects the power cable 7 to the power supply unit 6. Next, the worker pulls the power cable 7 out of the housing portion 10 through a hole that penetrates the bottom of the housing portion 10, and fixes the power cable 7 to the outer bottom surface of the housing portion 10 with the cable gland 14.

[0047] Next, the worker inserts one mounting screw 22 into each of the four insertion holes provided in the mounting plate 21 of the light source unit 2, and then screws these four mounting screws 22 into the four female threads 112 of the flange portion 11, one by one, thereby screwing the light source unit 2 to the flange portion 11. Before screwing the light source unit 2 to the flange portion 11, the worker electrically connects the output wire drawn from the power supply unit 6 to a connector mounted on the board 201 of the LED module 20.

[0048] Next, the worker attaches the seal member 5 to the peripheral portion 91 of the unit body 90 by inserting the peripheral portion 91 into the groove 54 of the seal member 5. Then, the worker places the lens unit B1 with the seal member 5 attached on the front surface of the flange portion 11, and then covers the seal member 5 with the frame 3 from the front.

[0049] Then, the worker inserts one mounting bolt 34 from the front into each of the eight insertion holes 320 of the protruding piece 32 and the eight insertion holes 111 of the flange portion 11. The worker tightens two mounting nuts 35 onto each of the mounting bolts 34 inserted into the insertion holes 111 of the flange portion 11 to fix the frame 3 to the flange portion 11 of the fixture body 1 (see FIG. 8).

[0050] Finally, the worker attaches the arm 4 to the frame 3 by inserting one bolt 80 into each of the insertion holes 410 of the pair of arm portions 41 and screwing each bolt 80 into each of the nuts 81 fixed to the pair of mounting portions 31.

[0051] The above steps complete the assembly of the lighting fixture A1.

[0052] (2-8) Light distribution characteristics of lighting fixtures Next, the light distribution characteristics of lighting fixture A1 will be described with reference to Fig. 12. In Fig. 12, 0° is the direction of optical axis L1 of LED 200. From 0° to plus 90° counterclockwise is the upward direction from optical axis L1, and from 0° to minus 90° clockwise is the downward direction from optical axis L1. The position of origin O is the position of LED 200, and the distance from origin O (the radius of the concentric circles) indicates the brightness (luminous intensity [cd]).

[0053] 12, the solid line α1 indicates the light distribution characteristics in a vertical (up-down) plane including the optical axis L1, and the dashed line β1 indicates the light distribution characteristics in a horizontal (left-right) plane including the optical axis L1. As indicated by the solid line α1, the vertical light distribution characteristics have a luminous intensity (beam) peak approximately 24° above the optical axis L1. On the other hand, as indicated by the dashed line β1, the horizontal light distribution characteristics have luminous intensity peaks in the direction of the optical axis L1 and in directions approximately 54° to the left and right of the optical axis L1.

[0054] (3) Variations Next, a modified example of the lighting device A1 according to the embodiment will be described. However, the lighting device A1 according to the modified example is characterized by the lens unit B2, and the configuration other than the lens unit B2 is the same as that of the lighting device A1 according to the embodiment. Therefore, in the following description of the lighting device A1 according to the modified example, the same reference numerals will be used to designate the same components as those of the lighting device A1 according to the embodiment, and illustrations and descriptions thereof will be omitted as appropriate.

[0055] Similar to lens unit B1, lens unit B2 has a unit body 90, a peripheral portion 91, and a plurality of lenses 96 (see FIGS. 13-15). FIG. 13 shows a rear view of lens unit B2. FIG. 14 shows a vertical (up-down) cross-sectional view of light source unit 2 with a portion omitted. FIG. 15 shows a horizontal (left-right) cross-sectional view of light source unit 2 with a portion omitted.

[0056] The lenses 96 correspond one-to-one to the LEDs 200 of the LED module 20. That is, the distribution of light emitted from each LED 200 is controlled by each lens 96 corresponding one-to-one to each LED 200.

[0057] Each of the plurality of lenses 96 has an incident portion 960. The incident portion 960 has a bottom portion 961 facing the LED 200, and a pair of side walls 962 that protrude toward the LED module 20 with the bottom portion 961 sandwiched between them (see FIG. 14). However, the pair of side walls 962 is connected in the longitudinal direction (left-right direction) to each of the plurality of lenses 96 that are lined up in a row in the lateral direction (left-right direction) among the plurality of lenses 96 (see FIG. 13).

[0058] The bottom portion 961 is provided between a pair of side walls 962 (see FIGS. 13 to 15). The bottom portion 961 is inclined in the front-rear direction when viewed from the left-right direction (see FIG. 14).

[0059] The pair of side walls 962 has an incident surface 963 and a total reflection surface 964 (see FIG. 14). However, the pair of side walls 962 are formed in an asymmetric shape (see FIG. 14).

[0060] The 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 a modified example, the inclination angle of the incident surface 963 of the upper side wall 962 of the pair of side walls 962 is smaller than the inclination angle of the incident surface 963 of the lower side wall 962.

[0061] Each total reflection surface 964 of the pair of side walls 962 is a flat surface inclined with respect to the optical axis L1. Furthermore, each total reflection surface 964 of the pair of side walls 962 has a different inclination angle with respect to the optical axis L1 (see FIG. 14). For example, in a 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).

[0062] The light distribution characteristics of lighting fixture A1 of the modified example are shown in Fig. 16. In Fig. 16, 0° is the direction of optical axis L1 of LED 200. From 0° to +90° counterclockwise, the direction is upward from optical axis L1, and from 0° to -90° clockwise, the direction is downward from optical axis L1. The position of origin O is the position of LED 200, and the distance from origin O (the radius of the concentric circles) indicates the brightness (luminous intensity [cd]).

[0063] 16, solid line α2 indicates the light distribution characteristics in a vertical (up-down) plane including optical axis L1, and dashed line β2 indicates the light distribution characteristics in a horizontal (left-right) plane including optical axis L1. As indicated by solid line α2, the vertical light distribution characteristics have a luminous intensity (beam) peak in a direction approximately 22° above the optical axis L1. On the other hand, as indicated by dashed line β2, the horizontal light distribution characteristics have luminous intensity peaks in directions approximately 10° to the left and right of the optical axis L1.

[0064] The light distribution characteristics in the modified example have a narrower horizontal (left-right) light distribution angle and a wider vertical (up-down) light distribution angle than the light distribution characteristics in the embodiment.

[0065] (4) Advantages of the embodiment As described above, in the lighting fixture A1, the lens units B1 and B2 have incident portions 93 and 960 provided on the surfaces facing the LED modules 20. The incident portions 93 and 960 have bottom portions 94 and 961 facing the multiple LEDs 200 and a pair of side walls 95 and 962 that protrude toward the LED module 20 with the bottom portion 94 and 961 sandwiched between them. The pair of side walls 95 and 962 have incident surfaces 950 and 963 onto which illumination light emitted from the LEDs 200 is incident, and total reflection surfaces 951 and 964 that internally and totally reflect the illumination light incident from the incident surfaces 950 and 963. The total reflection surfaces 951 and 964 of the pair of side walls 95 and 962 internally and totally reflect the illumination light asymmetrically with respect to the optical axis L1 of the LEDs 200.

[0066] Thus, the lighting fixture A1 uses the total internal reflection surfaces 951; 964 of a pair of side walls 95; 962 of the lens units B1; B2 to totally internally reflect the illumination light asymmetrically with respect to the optical axis L1 of the LED 200, so that the illumination light can be tilted and distributed in any direction.

[0067] Furthermore, the lens units B1 and B2 (light distribution control members) have a light distribution control function for controlling the light distribution of the LED module 20, as well as a protection function for protecting the light source unit 2. That is, the lighting fixture A1 has a light distribution control function and a protection function for the light source unit 2 in one component (lens units B1 and B2), and therefore the number of components can be reduced, thereby improving the workability of the assembly work.

[0068] Furthermore, since the pair of side walls 95 and 962 of the lighting device A1 have asymmetric shapes, it is easy to achieve asymmetric internal total reflection of illumination light with respect to the optical axis L1. Furthermore, since the incident surfaces 950 and 963 of the pair of side walls 95 and 962 of the lighting device A1 are flat surfaces with different inclination angles with respect to the optical axis L1, it is easy to achieve a light distribution characteristic tilted in any direction. Moreover, since the total reflection surfaces 951 and 964 of the pair of side walls 95 and 962 of the lighting device A1 are flat surfaces tilted with respect to the optical axis L1, it is even easier to achieve a light distribution characteristic tilted in any direction.

[0069] Here, in lens units B1 and B2, the bottoms 94 and 961 are asymmetric with respect to the optical axis L1 (see FIGS. 10 and 14). That is, the centers of the bottoms 94 and 961 are offset from the optical axis L1 in the vertical direction. This makes it even easier for lighting fixture A1 to achieve a light distribution characteristic tilted in any direction.

[0070] In addition, the lighting fixture A1 has a flat emission surface 900, which is the front surface of the lens units B1 and B2 (the surface opposite to the surface facing the LED module 20), and therefore the appearance can be improved.

[0071] (5) Summary A lighting fixture (A1) according to a first aspect of the present disclosure includes an LED module (20) having a plurality of LEDs (200) arranged in at least one row and mounted on a substrate (201), and a light distribution control member (lens units B1; B2) that controls the distribution of illumination light emitted from the plurality of LEDs (200). The light distribution control member has an incident portion (93; 960) provided on a surface facing the LED module (20). The incident portion (93; 960) has a bottom portion (94; 961) facing 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) sandwiched therebetween. The pair of side walls (95; 962) have incident surfaces (950; 963) on which illumination light emitted from the LED (200) is incident, and total reflection surfaces (951; 964) that internally and totally reflect the illumination light incident from the incident surfaces (950; 963). The total reflection surfaces (951; 964) of the pair of side walls (95; 962) internally and totally reflect the illumination light asymmetrically with respect to the optical axis (L1) of the LED (200).

[0072] The lighting fixture (A1) according to the first aspect totally internally reflects the illumination light asymmetrically with respect to the optical axis (L1) of the LED (200) by the total reflection surfaces (951; 964) of a pair of side walls (95; 962) of the light distribution control member, so that the illumination light can be tilted and distributed in any direction.

[0073] A lighting fixture (A1) according to a second aspect of the present disclosure can be realized by combining it with the first aspect. In the lighting fixture (A1) according to the second aspect, the pair of side walls (95; 962) preferably have an asymmetric shape.

[0074] In the lighting fixture (A1) according to the second aspect, the pair of side walls (95; 962) have asymmetric shapes, so that it is easy to realize total internal reflection of illumination light asymmetrically with respect to the optical axis (L1).

[0075] A lighting device (A1) according to a third aspect of the present disclosure can be realized by combining it with the second aspect. In the lighting device (A1) according to the third aspect, it is preferable that the incident surfaces (950; 963) of the pair of side walls (95; 962) are flat surfaces having different inclination angles with respect to the optical axis (L1).

[0076] The lighting fixture (A1) according to the third aspect can easily achieve a light distribution characteristic tilted in any direction.

[0077] A lighting device (A1) according to a fourth aspect of the present disclosure can be realized by combining it with any one of the first to third aspects. In the lighting device (A1) according to the fourth aspect, it is preferable that the total reflection surfaces (951; 964) of the pair of side walls (95; 962) are flat surfaces inclined with respect to the optical axis (L1).

[0078] The lighting fixture (A1) according to the fourth aspect can more easily achieve a light distribution characteristic tilted in any direction.

[0079] A lighting device (A1) according to a fifth aspect of the present disclosure can be realized by combining it with any of the first to fourth aspects. In the lighting device (A1) according to the fifth aspect, the bottom (94; 961) is preferably asymmetric with respect to the optical axis (L1).

[0080] The lighting fixture (A1) according to the fifth aspect can more easily achieve a light distribution characteristic tilted in any direction.

[0081] A lighting device (A1) according to a sixth aspect of the present disclosure can be realized by combining it with any of aspects 1 to 5. In the lighting device (A1) according to the sixth aspect, it is preferable that the light output surface (900) opposite the opposing surface of the light distribution control member is flat.

[0082] The lighting fixture (A1) according to the sixth aspect can improve the appearance. [Explanation of symbols]

[0083] A1 Lighting fixture B1; B2 Lens unit (light distribution control component) L1 optical axis 1. Instrument body 20 LED modules 93 Incidence part 94 Bottom 95 Side wall 200 LED 201 Substrate 900 exit surface 950 Entrance plane 951 Total reflection surface 960 Incidence part 961 Bottom 962 Side wall 963 Incidence plane 964 Total reflection surface

Claims

1. an LED module in which a plurality of LEDs are arranged in a plurality of rows and mounted on a substrate; a light distribution control member that controls the light distribution of illumination light emitted from the plurality of LEDs; Equipped with the light distribution control member has an incident portion provided on a surface facing the LED module, the incident portion has a bottom portion facing the plurality of LEDs and a pair of side walls that protrude toward the LED module with the bottom portion interposed therebetween, the pair of side walls have an incident surface onto which the illumination light emitted from the LED is incident and a total reflection surface that internally and totally reflects the illumination light incident from the incident surface, and the pair of side walls have an asymmetric shape; the total reflection surfaces of the pair of side walls are planes inclined with respect to an optical axis of the LED, and cause the illumination light to be totally internally reflected asymmetrically with respect to the optical axis; an inclination angle of the total reflection surface of the upper side wall of the pair of side walls being larger than an inclination angle of the total reflection surface of the lower side wall; Lighting fixtures.

2. A lighting device as described in claim 1, wherein the incident surface of each of the pair of side walls is a plane having a different inclination angle relative to the optical axis.

3. The bottom is asymmetric with respect to the optical axis.

3. The lighting fixture according to claim 1 or 2.

4. The light distribution control member has an exit surface opposite to the opposing surface that is flat. A lighting fixture according to any one of claims 1 to 3.

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