JP7065703B2 - Light diffusion cover and lighting equipment equipped with it - Google Patents

Description

The present invention relates to a light diffusion cover and a lighting fixture.

Conventionally, a lighting fixture provided with an LED element as a light source is known (see, for example, Patent Document 1).

The lighting fixture disclosed in Patent Document 1 has a lens portion on the irradiation surface side of the LED element in order to diffuse the light emitted from the LED element, which is a light source having strong directivity, to emit more uniform light. A member is provided. The diffusion member of Patent Document 1 has a substantially circular ridge portion at a position facing the LED element row and a flat portion covering the substrate extending in the width direction from the ridge portion.

In a diffuser member as in Patent Document 1, the light emitted from the LED element is diffused in the radial direction (inner peripheral direction and outer peripheral direction) of the luminaire by the ridge portion.

Japanese Unexamined Patent Publication No. 2012-146440

In the diffusion member as in Patent Document 1, as shown in FIG. 22, the light emitted from the LED element 42 is refracted so as to diffuse radially on the incident surface 1095a of the ridge portion 1095, and is directed to the emission surface 1095b side. move on. The light that has reached the emission surface 1095b is further refracted and diffuses in the radial direction. At this time, the incident surface 1095a and the exit surface 1095b of the ridge portion 1095 are provided at different inclination angles with respect to the optical axis C of the LED element 42. The incident surface 1095a is formed in a dome shape in a cross-sectional view in order to refract the light emitted from the LED element 42 at a wide angle. The emission surface 1095b is formed of a surface that is inclined at an angle larger than that of the incident surface 1095a with respect to the optical axis C in order to refract the light emitted from the LED element 42 at a wide angle. Therefore, the thickness of the ridge portion 1095 tends to increase from the exit surface side to the entrance surface side.

However, when the thickness of the ridge portion becomes large, the difference in thickness from the flat portion becomes large, and there is a possibility that residual stress tends to remain in the thick portion of the ridge portion. If residual stress remains, there is a possibility that molding defects and deformation due to aging deterioration will occur. In order to mold so as not to leave residual stress in the thick part, it is necessary to lengthen the cooling and solidification time of the resin material, which may increase the difficulty of molding and lengthen the molding cycle. rice field.
Therefore, as a configuration of a light diffusion cover and a lighting fixture provided with the light diffusion cover, a light diffusion cover that diffuses light to emit light more uniformly and is easy to mold and a lighting fixture provided with the light diffusion cover are desired.

Therefore, the present invention has been made in view of the above problems, and is a light diffusion cover that diffuses light to expand the light distribution and has high moldability even when a light source having strong directivity is used. The purpose is to provide a lighting fixture equipped with.

The problem to be solved by the present invention is as described above, and next, the means for solving this problem will be described.

That is, the light diffusion cover disclosed in the present application is
A translucent light diffusion cover that covers the irradiation surface side of the light source of the lighting equipment.
The light source unit has at least one LED element sequence in which a plurality of LED elements are arranged side by side.
The light diffusion cover has a lens portion that is convex toward the irradiation surface side and overlaps with the LED element row in a plan view.
The lens unit is provided so as to correspond to one of the LED element trains.
The lens portion has a plurality of ribs that are continuously arranged in a predetermined direction, and the plurality of ribs extend in a direction along the LED element row.
Each of the plurality of ribs has an inclined surface inclined at a predetermined angle with respect to the optical axis of the LED element, and the optical axis of the LED element is more than the inclined surface of the rib outside the predetermined direction of the plurality of ribs. The inclined surface of the rib in the vicinity has a steep angle .

In the light diffusion cover disclosed in the present application,
It is preferable that the plurality of ribs have an asymmetrical shape with respect to the optical axis of the LED element in a cross-sectional view.

In the light diffusion cover disclosed in the present application,
It is preferable that the plurality of ribs have a symmetrical shape with respect to the optical axis of the LED element in a cross-sectional view.

In the light diffusion cover disclosed in the present application,
The LED element sequence is preferably annular.

In the light diffusion cover disclosed in the present application,
The light source unit has a first LED element sequence and a second LED element array.
The lens portion has a first lens portion and a second lens portion.
The first lens unit is provided so as to overlap with the first LED element row in a plan view.
It is preferable that the second lens portion is provided so as to overlap with the second LED element row in a plan view.

In addition, the lighting equipment disclosed in the present application is
It has the above-mentioned light diffusion cover.

According to the present invention, even when a light source having strong directivity is used, by forming a plurality of ribs in the lens portion of the light diffusion cover, the light is diffused to expand the light distribution, and the irradiation light of the luminaire is balanced. The degree can be improved. In addition, since it is possible to suppress the thickening of the lens portion, it is possible to suppress an increase in molding difficulty due to uneven thickness, and also to suppress molding defects and performance deterioration due to residual stress.

A perspective view of a lighting fixture according to an embodiment of the present invention as viewed from diagonally below. A side view also showing a lighting fixture. Similarly, an exploded perspective view of the lighting fixture seen from diagonally above. Similarly, an exploded perspective view of the lighting fixture seen from diagonally below. A perspective view showing a lighting fixture (with the translucent cover removed). The perspective view which shows the lighting equipment (the state which the translucent cover and the protective cover are removed). A perspective view showing a power supply cover. The perspective view which shows the power-source part. The perspective view which shows the state which arranged the power-source part in the instrument body. The perspective view which shows the instrument upper cover and the mounting part. The plan view which shows the state which combined the power-feeding side connector part with the mounting part. The perspective view which shows the irradiation surface side of a protective cover. The perspective view which shows the mounting surface side of the protective cover. The plan view which shows the substrate material (the original substrate). The plan view which shows the irradiation surface side of a protective cover. FIG. 15 is a cross-sectional view taken along the line AA shown in FIG. FIG. 6 is a partially enlarged cross-sectional view showing an enlarged lens portion of FIG. FIG. 6 is a partially enlarged cross-sectional view showing light distribution control of the lens portion of FIG. The cross-sectional view which shows the other embodiment of the lens part. The cross-sectional view which shows the other embodiment of the lens part. FIG. 19 is a cross-sectional view showing light distribution control of the lens portion of FIG. The cross-sectional view which shows the cross section in the radial direction of the ridge part in the conventional diffusion member.

The lighting equipment 11 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 21. The lighting fixture 11 according to the present embodiment is a lighting fixture using a plurality of LED elements 42 as a light source. As shown in FIGS. 1 and 2, the luminaire 11 is a ceiling light directly attached to a mounting surface (not shown) such as a ceiling. In the following description, the side that irradiates the light of the luminaire 11 is the irradiation surface side of the luminaire 11, and the side of the luminaire 11 that faces the mounting surface such as the ceiling is the mounting surface side of the luminaire 11 (the ceiling in the mounted state). Side). Further, in the luminaire 11, the vertical direction in FIGS. 2 to 4 and 10 will be described as the "vertical direction" of the luminaire 11. The direction orthogonal to the vertical direction will be described as the radial direction. Further, in the description of the present embodiment, the state in which the lighting fixture 11 and the like are viewed from below is defined as a plan view. The state in which the lighting fixture 11 or the like is viewed from a direction orthogonal to the vertical direction is defined as a side view. The state in which the cross-sectional shape of the lighting fixture 11 or the like is viewed is referred to as a cross-sectional view.

The lighting fixture 11 mainly has a fixture main body 21, a power supply section 31, a light source section 41, a translucent cover 51, a fixture upper cover 61, a mounting portion 71, a receiving portion 81, and a protective cover 91. The lighting fixture 11 has a circular shape in a plan view.
The shape of the luminaire 11 is not limited to the circular shape as shown in the present embodiment, and the shape in a plan view may be a square shape or the like.

The fixture body 21 constitutes the main body of the lighting fixture 11. The instrument body 21 is a member called a so-called base or chassis. The instrument body 21 has a flat, substantially hat-like shape and a circular outer contour shape in a plan view. The instrument main body 21 holds a light source unit 41, a protective cover 91, a translucent cover 51, and the like on the irradiation surface side. The instrument main body 21 holds the power supply unit 31, the instrument upper cover 61, and the like on the mounting surface side.

The instrument body 21 is formed with a recess (a portion on the mounting surface side of the accommodating portion 26 described later) on the mounting surface side. The instrument main body 21 has a convex portion (a portion on the irradiation surface side of the accommodating portion 26 described later) formed on the irradiation surface side opposite to the mounting surface side. As shown in FIG. 3, the instrument main body 21 has an opening 22, an inner peripheral edge 23, a bottom plate 24, a peripheral wall 25, an accommodating portion 26, and a flange portion 27, and is integrally formed as a single member. Has been done. In the instrument main body 21, the irradiation surface side of the bottom plate portion 24 serves as a light source attachment portion 24a for attaching the light source portion 41, and the light source attachment portion 24a is provided at the top of the convex portion on the irradiation surface side of the instrument main body 21. The appliance body 21 has durability and strength capable of holding a power supply unit 31, a mounting unit 71, an instrument top cover 61, a protective cover 91, a translucent cover 51, etc., and dissipates heat generated by the power supply unit 31 and the light source unit 41. It is formed by using a metal plate such as iron, aluminum, or an alloy thereof in consideration of thermal conductivity. The instrument body 21 is not limited to the metal material described above as long as it is a material having high durability, strength and heat dissipation, and can be formed of other materials such as other alloy materials and resins.
In the present embodiment, the inner peripheral edge portion 23, the bottom plate portion 24, the peripheral wall portion 25, the accommodating portion 26, and the flange portion 27 are integrally formed as the instrument main body 21, but the present invention is not particularly limited. Each of the above-mentioned constituent members may be assembled and configured.

The opening 22 is a circular opening where the mounting portion 71 is exposed. The opening 22 is provided at a position centered in the radial direction of the instrument main body 21.

The inner peripheral edge portion 23 is a peripheral edge portion of the opening portion 22, and is annular in a plan view. The inner peripheral edge portion 23 is a portion where the other end (lower end) of the mounting portion 71 is in contact with or close to the other end.

The bottom plate portion 24 is a plate-shaped portion formed in an annular shape around the inner peripheral edge portion 23. The bottom plate portion 24 has a light source mounting portion 24a which is a flat surface on which the light source portion 41 is mounted on the irradiation surface side.

The light source mounting portion 24a is a flat surface on which a plurality of (two in this embodiment) LED light source modules 44 are mounted at predetermined positions, and the LED light source modules 44 are mounted in contact with the flat surface. Since the light source mounting portion 24a also functions as a heat radiating section that transmits the heat generated by the light source section 41 and discharges it to the outside, the light source mounting section 24a to which the light source section 41 is mounted has a large contact area with the light source section 41. It is formed flat.

A square-shaped insertion hole 24b having a connection terminal at one end for inserting a wiring extending from the power supply unit 31 is provided in the middle portion in the radial direction of the bottom plate portion 24.

A light receiving window 24c, which is an oval-shaped opening in a plan view, is provided at a position corresponding to the light receiving element 82 of the receiving unit 81 in the middle portion in the radial direction of the bottom plate portion 24. The light receiving window 24c is arranged close to the insertion hole 24b.

A plurality of through holes 24d for fitting the claw portion 94a of the protective cover 91 are provided in the vicinity of the outer peripheral edge of the bottom plate portion 24. The plurality of through holes 24d are arranged substantially evenly in the circumferential direction of the bottom plate portion 24.

A plurality of (four in this embodiment) screw fixing portions 24f for fixing the LED light source module 44 to the light source mounting portion 24a by screw members are provided in the middle portion in the radial direction of the bottom plate portion 24.

The peripheral wall portion 25 is a tapered portion whose diameter is increased upward from the outer peripheral edge of the bottom plate portion 24. The peripheral wall portion 25 is provided with a substantially square through hole 25a for combining the channel changeover switch portion 38 of the power supply portion 31 so as to be exposed (see FIG. 5). The through hole 25a is formed according to the external dimensions of the channel changeover switch portion 38, and is slightly larger than the external dimensions of the channel changeover switch portion 38.

The accommodating portion 26 is a flat and bottomed substantially cylindrical portion formed by the inner peripheral edge portion 23, the bottom plate portion 24, and the peripheral wall portion 25. The housing portion 26 has a circular outer shape in a plan view. The accommodating portion 26 is formed in a concave shape downward when viewed from the mounting surface side, and is formed in a convex shape downward when viewed from the irradiation surface side. The accommodating portion 26 is a portion in which a part of the power supply unit 31 and the mounting unit 71 is accommodated. A wiring component 110 such as a hook ceiling adapter is attached to the mounting portion 71, and the lighting fixture 11 is electrically connected to the wiring fixture arranged on the mounting surface side such as the ceiling via the wiring component 110. A claw portion 20 of the power supply case 35, which will be described later, is engaged with the bottom plate portion 24 which is the bottom surface of the accommodating portion 26, and a plurality of (two in the present embodiment) notches 24e for positioning the power supply case 35. Is provided.

The collar portion 27 is formed around the accommodating portion 26. The flange portion 27 is an annular portion that protrudes radially outward from the outer peripheral edge of the upper end of the peripheral wall portion 25. The flange portion 27 is an outer peripheral edge portion of the instrument main body 21. A plurality of (three in this embodiment) holding portions 29 for holding the translucent cover 51 are provided on the irradiation surface side of the flange portion 27. The plurality of holding portions 29 are arranged at substantially equal intervals along the circumferential direction of the flange portion 27. Further, a plurality of (four in this embodiment) cushioning materials 30 are arranged at substantially equal intervals on the mounting surface side of the flange portion 27. The cushioning material 30 is sandwiched between the mounting surface and the lighting fixture 11 in a state where the lighting fixture 11 is mounted on a mounting surface such as a ceiling, and the elastic force thereof prevents the lighting fixture 11 from rattling. be. The details of the mounting position of the cushioning material 30 will be described later.

The power supply unit 31 is electrically connected to the light source unit 41 and is attached as one unit (1 unit) to the accommodating unit 26 which is a recess of the instrument main body 21. Specifically, the power supply unit 31 has a power supply circuit unit 32, a power supply case 35 accommodating the power supply circuit unit 32, a power supply side connector unit 37, and a channel changeover switch unit 38. One end side (irradiation surface side) of the power supply unit 31 is accommodated and mounted in the accommodating portion 26, and the other end side (mounting surface side) abuts on the instrument upper cover 61.

The power supply circuit unit 32 is a power supply circuit for supplying power to the LED element 42 (see FIG. 6) included in the light source unit 41 to light the LED element 42. The power supply circuit unit 32 is a power supply circuit in which a plurality of electronic parts such as power supply circuit parts are mounted on a power supply board 33 which is a printed wiring board processed into a substantially D-shape in a plan view, in which one end is formed in an arc shape. Is. The power supply circuit unit 32 converts an alternating current supplied from an external commercial power source into a predetermined direct current, and supplies the converted current to a plurality of LED elements 42 mounted on the substrate 43. The power supply circuit unit 32 (power supply board 33) is arranged with the mounting surface side of electronic components such as power supply circuit components facing downward. Electronic components such as power supply circuit components and a remote control signal receiving unit 81 are arranged on the mounting surface side (lower surface side) of the power supply board 33. The receiving unit 81 has a light receiving element 82 and a channel changeover switch 83. That is, the power supply unit 31 is formed by mounting an electronic component such as a power supply circuit component and a light receiving element 82 that receives a remote control signal on the same substrate. Further, the power supply unit 31 is formed by mounting an electronic component such as a power supply circuit component and a channel changeover switch 83 on the same board. Further, in the power supply unit 31, electronic parts such as the power supply circuit parts, a light receiving element 82, and a channel changeover switch 83 are mounted on one surface (lower surface) of the power supply board 33. On the power supply board 33, the light receiving element 82 of the receiving unit 81 is arranged at a position facing the light receiving window 35a2 of the power supply case 35 and the light receiving window 24c of the instrument main body 21. Further, a channel changeover switch 83 is arranged at one end of the power supply board 33 (the top of the arc-shaped end). The power supply circuit unit 32 is provided with a power supply side connector 34 via wiring. When the lighting fixture 11 is attached to a mounting surface such as a ceiling, the power supply side connector 34 is connected to a connector (not shown) on the wiring fixture side, so that the power supply circuit unit 32 is via the ceiling wiring fixture for the lighting fixture. Electrically connected to an external commercial power source. The power supply circuit unit 32 and the light source unit 41 are electrically connected by wiring (not shown) via an insertion hole 35a1 described later.

The power supply case 35 is a flat, bottomed container-like member made of a resin material and having an open mounting surface side. The power supply case 35 of the present embodiment has a flat side facing the mounting portion 71 and a curved side facing the peripheral wall portion 25 of the instrument main body 21, and is formed in a substantially D-shape in a plan view. The power supply case 35 can be attached to the instrument main body 21. The power supply case 35 includes a bottom surface portion 35a, a first peripheral wall portion 35b, a second peripheral wall portion 35c, a third peripheral wall portion 35d, a power feeding side connector holding portion 35e, a channel changeover switch portion 38, and a power supply board holding portion. It has 39 (locking portion 39a, regulating portion 39b). The power supply case 35 is a member having electrical insulation.

The bottom surface portion 35a is a plate-shaped portion having a substantially D-shape in a plan view. The first peripheral wall portion 35b is a plate-shaped portion extending upward from the long side portion of the bottom surface portion 35a. The second peripheral wall portion 35c is a side wall facing each other in the longitudinal direction, and is a plate-shaped portion extending upward from a pair of short side portions of the bottom surface portion 35a. The third peripheral wall portion 35d extends from the arcuate portion of the bottom surface portion 35a, and is formed so as to be close to or in contact with the peripheral wall portion 25 of the instrument main body 21, and the curved portion 35d1 and the upper end of the curved portion 35d1. It has a plan-viewing arc-shaped extending portion 35d2 extending upward from the above.

The bottom surface portion 35a has a circular insertion hole 35a1 for inserting a wiring for electrically connecting the power supply circuit portion 32 and the light source portion 1, and an oval-shaped light receiving window 35a2 at a position corresponding to the light receiving element 82 described later. And have.

The inside of the power supply case 35 has a power supply circuit arrangement unit 36 that accommodates and arranges the power supply circuit unit 32 (power supply board 33) having a substantially D-shaped plan view. The power supply case 35 has a power supply board holding unit 39 for holding the power supply board 33 arranged in the power supply circuit arrangement unit 36. The power supply board holding portions 39 are vertically erected upward in the vicinity of the channel changeover switch portion 38 on the mounting surface side of a plurality of (eight in this embodiment) locking portions 39a and the bottom surface portion 35a. It is composed of the regulation unit 39b. The locking portion 39a is provided on the peripheral edge portion on the upper end side of the power supply case 35 (see FIG. 7). The power supply board holding unit 39 locks the peripheral edge portion of the power supply board 33 when the power supply circuit unit 32 is housed in the power supply circuit arrangement unit 36. The locking portion 39a has an arrowhead-shaped claw portion 39a1 and a convex portion 39a2 extending from each peripheral wall portion toward the power supply circuit arrangement portion 36 in the vicinity of the arrowhead-shaped claw portion 39a1. The arrowhead-shaped claw portion 39a1 and the convex portion 39a2 have a gap in lateral view. In the gap between the arrowhead-shaped claw portion 39a1 and the convex portion 39a2, the power supply board 33 is sandwiched by the arrowhead-shaped claw portion 39a1 and the convex portion 39a2. The power supply board 33 is arranged at a predetermined position of the power supply circuit arranging portion 36 so as to have a predetermined distance from the bottom surface portion 35a of the power supply case 35 by the locking portions 39a at a plurality of locations on the outer peripheral edge side thereof. The regulating unit 39b abuts on the irradiation surface side of the power supply board 33 and restricts the power supply board 33 from moving downward. Further, the tip portion of the regulating portion 39b can be fitted with the through hole 33a provided in the power supply board 33. As a result, the vicinity of the channel changeover switch 83 of the power supply board 33 is positioned at a predetermined position near the channel changeover switch unit 38 of the power supply circuit arrangement unit 36. Further, the positional deviation of the power supply board 33 in the vicinity of the channel changeover switch 83 is prevented. By restricting the position of the power supply board 33 by the regulation unit 39b in the vicinity of the channel changeover switch unit 38, the position shift of the channel changeover switch 83 is less likely to occur when the channel changeover operation is performed, and the operation is easy.
That is, the power supply board 33 is attached to a predetermined position of the power supply case 35 by the locking portion 39a and the regulation portion 39b so as to have a predetermined distance from the bottom surface portion 35a of the power supply case 35.

As shown in FIG. 8, on the irradiation surface side of the power supply case 35 (the surface opposite to the arrangement side of the power supply circuit unit 32), a plurality of (two in this embodiment) claw portions 20 projecting sideways. Is provided. As shown in FIG. 9, the claw portion 20 is a portion that fits into the notch portion 24e provided in the bottom plate portion 24 of the accommodating portion 26 of the instrument main body 21. In the power supply case 35, the power supply case 35 is positioned at a predetermined position of the bottom plate portion 24 by fitting the claw portion 20 of the power supply case 35 into the notch portion 24e provided in the bottom plate portion 24. The power supply case 35 is fixed by being sandwiched between the instrument main body 21 and the instrument upper cover 61.

As shown in FIG. 11, the power feeding side connector holding portion 35e is a portion of the first peripheral wall portion 35b facing the mounting portion 71 that protrudes convexly toward the mounting portion 71. As shown in FIG. 7, the power supply side connector holding portion 35e is a portion communicating with the power supply circuit arrangement portion 36, and is bottomed and has an open upper end. The power feeding side connector holding portion 35e has an insertion hole 35f for inserting the power feeding side connector 34. The power supply side connector 34 extending from the power supply circuit unit 32 via wiring is held by the power supply side connector holding unit 35e in a state of protruding from the insertion hole 35f.
The power feeding side connector holding portion 35e of the present embodiment is an example of the feeding side connector holding portion in the present invention. The shape of the power feeding side connector holding portion, the position provided in the power supply case, and the like may be appropriately changed.

The channel changeover switch portion 38 is provided in the central portion in the longitudinal direction of the third peripheral wall portion 35d facing the peripheral wall portion 25, and is a substantially square portion in the side view exposed from the through hole 25a of the instrument main body 21. The channel changeover switch unit 38 is a portion in which the channel changeover switch 83 is arranged when the power supply board 33 is arranged in the power supply case 35. The channel changeover switch portion 38 has an overhanging portion 38a projecting outward in the radial direction at the upper end, and a through hole 38b at the lower portion of the overhanging portion 38a for exposing the tip end portion of the channel changeover switch 83. The channel changeover switch portion 38 is combined with the through hole 25a of the instrument main body 21, and the channel changeover switch portion 38 is exposed on the side surface of the peripheral wall portion 25. The exposed portion of the channel changeover switch portion 38 is inclined substantially along the inclination of the peripheral wall portion 25, and is formed so that the user can easily see it from below. As described above, since the channel changeover switch portion 38 is exposed to the irradiation surface side through the through hole 25a of the instrument main body 21, the channel setting work is easy.
Although a plurality of electric components are mounted on the mounting surface of the power supply board 33, some of the electric components are omitted in FIG. 3 and the like in order to clearly show the configuration of the power supply board 33. Further, the channel changeover switch unit 38 of the present embodiment is an example of the channel changeover switch unit in the present invention. The shape of the channel changeover switch unit, the position provided in the power supply case, and the like may be appropriately changed.

By configuring the power supply unit 31 in this way, the power supply circuit unit 32 (power supply board 33), the receiving unit 81 (light receiving element 82, channel changeover switch 83), and the power feeding side connector 34 are integrated into one unit. It has become. First, in the power supply unit 31, the claw portion 20 is locked to the notch portion 24e provided in the bottom plate portion 24 of the instrument main body 21. The channel changeover switch portion 38 is arranged on the irradiation surface side of the instrument main body 21 in a state where the overhanging portion 38a is locked to the inner peripheral end portion of the flange portion 27 of the instrument main body 21. The instrument upper cover 61 is attached to the instrument body 21 with the power supply unit 31 arranged on the instrument body 21. By attaching the instrument upper cover 61 to the instrument main body 21, the power supply unit 31 is sandwiched and fixed between the instrument main body 21 and the instrument upper cover 61. At that time, the power feeding side connector portion 37 (feeding side connector holding portion 35e) is combined with the feeding side connector guide portion 76 described later of the mounting portion 71. Further, the channel changeover switch portion 38 is combined with the through hole 25a of the instrument main body 21.
As a result, the power feeding side connector 34 is mounted so as to be exposed inside the mounting portion 71. Further, the channel changeover switch portion 38 is attached so as to be exposed on the side surface of the peripheral wall portion 25. When mounting the lighting fixture 11 on a mounting surface such as a ceiling, the power supply side connector 34 is connected to a connector (not shown) on the wiring fixture side in a state of being arranged inside the mounting portion 71, thereby connecting the power supply circuit unit. 32 is electrically connected to an external commercial power source via a ceiling wiring fixture for lighting fixtures. In this way, the power supply circuit unit 32 (power supply board 33), the reception unit 81 (light receiving element 82, channel changeover switch 83), and the power supply side connector 34 are formed as one unit in the accommodating unit 26 of the instrument main body 21 via the power supply case 35. It is attached.

Further, since the power supply circuit unit 32 is housed in the power supply case 35 as described above, electrical insulation can be ensured between the power supply circuit unit 32 and the instrument main body 21. Further, by using the power supply case 35, the power supply circuit unit 32 (power supply board 33), the reception unit 81 (light receiving element 82, channel changeover switch 83), and the power supply side connector 34 are integrated into one unit as the power supply unit 31. These can be easily attached to the fixture main body 21 and the mounting portion 71 at the same time, and the assembleability of the lighting fixture 11 is improved. That is, it is possible to simplify the assembly work of the lighting fixture 11. Further, a work process of integrating the power supply circuit unit 32 (power supply board 33), the reception unit 81 (light receiving element 82, channel changeover switch 83), and the power supply side connector 34 into one unit by using the power supply case 35, and the corresponding work process. It becomes possible to divide the work process of attaching one unit to the instrument main body 21, and the productivity is improved.

Further, the mounting surface side of the power supply case 35 is open, and one surface side (mounting surface side) of the power supply board 33 is exposed. As a result, the heat generated from the power supply circuit unit 32 does not get trapped inside the power supply case 35. Further, since the side of the power supply case 35 facing the appliance upper cover 61 is open, heat is radiated to the outside through the appliance upper cover 61, so that the heat dissipation is improved.

The light source unit 41 is a portion that emits light toward the irradiation surface side of the lighting fixture 11. The light source unit 41 is arranged on a convex portion (a portion of the accommodating portion 26 on the irradiation surface side) of the instrument main body 21. The light source unit 41 has a plurality of LED elements 42. The light source portion 41 is a flat plate arranged on the light source mounting portion 24a on the irradiation surface side of the bottom plate portion 24. The light source mounting portion 24a has a flat surface. Specifically, the light source unit 41 has a plurality of (two in this embodiment) LED light source modules 44. Each LED light source module 44 is configured by mounting LED elements 42, which are a plurality of point light sources, on a substrate 43 (43a, 43b), which is a flat plate module substrate. The plurality of LED elements 42 are arranged at substantially equal intervals in a substantially concentric circle with the opening 22 of the instrument main body 21 as the center. The LED light source module 44 is arranged at a position on the irradiation surface side of the holding portion 29 of the instrument main body 21. As a result, the shadow of the holding portion 29 is less likely to appear on the translucent cover 51.

As shown in FIG. 6, the substrate 43 included in the LED light source module 44 is formed in a substantially semicircular ring having a predetermined width in a plan view. In the present embodiment, two LED light source modules 44 are used, but the substrate 43 of each LED light source module 44 is substantially semicircular and has a similar shape, but a part of the outer contour shape is different.

As shown in FIG. 14, the substrate 43a of one LED light source module 44 has a shape in which one corner on the inner peripheral side is cut out in a substantially L shape. That is, the substrate 43a has a notch portion 43a1 in which one end in the circumferential direction on the inner peripheral side is cut out in a substantially L shape. The substrate 43a has one end 43a2 and the other end 43a3, which are formed along the radial direction at both ends in the circumferential direction and are connected to the notch 43a1. The radial center portion of the one end portion 43a2 has a notch portion 43a4 cut out in a substantially semicircular shape so as to correspond to the insertion hole 24b of the bottom plate portion 24. On the outer peripheral side of the substrate 43a, a notch portion 43a5 and a notch portion 43a6 notched in a straight line in order from the side closer to the end portion 43a2 are provided.

As shown in FIG. 14, the substrate 43b of the other LED light source module 44 has a shape in which one corner on the inner peripheral side is cut out in a substantially L shape. That is, the substrate 43b has a notch portion 43b1 in which one end in the circumferential direction on the inner peripheral side is cut out in a substantially L shape. The substrate 43b has one end 43b2 and the other end 43b3, which are formed along the radial direction at both ends in the circumferential direction and are connected to the notch 43b1. At the radial center of the other end 43b3, there is a notch 43b4 cut out in a substantially semicircular shape so as to correspond to the insertion hole 24b of the bottom plate 24. On the outer peripheral side of the substrate 43b, there are a notch portion 43b5 and a notch portion 43b6 that are linearly cut out in order from the side closest to the end portion 43b3. The substrate 43b has a light receiving window 43b7 which is an oval-shaped opening corresponding to the light receiving window 24c. One substrate 43a has a notch 43a1 and a notch 43a4 formed at the same end (end 43a2), and the other substrate 43b has a notch 43b1 and a notch 43b4 at different ends (end 43a2). It is formed at the end 43b2 and the end 43b3), respectively.

In the substrate 43a and the substrate 43b, a notch 43a1 and a notch 43b1 are cut out at one end in the circumferential direction on the inner peripheral side, and a notch 43a5 and a notch 43a6 are cut out linearly on the outer peripheral side. A notch 43b5 and a notch 43b6 are provided. As a result, as shown in FIG. 14, when the substrate material (original substrate) is cut to produce a plurality of substrates, the notch 43a1 and the notch 43b1 are formed in the circumferential direction of the substrate 43a and the substrate 43b on the outer peripheral side. By arranging one end of the board material, it is possible to cut out efficiently, there are few parts to be discarded as the substrate material, and the manufacturing cost can be suppressed.

In the substrate 43 (43a, 43b) of each LED light source module 44, a plurality of screws (in this embodiment, two for each of the substrates 43a and 43b) such as screw holes are formed in the radial center portion along the circumferential direction. It has a fixed portion 46.

The substrate 43 (43a, 43b) has a circular shape for positioning by being locked to a plurality of (four in this embodiment) circular convex portions 24g provided on the light source mounting portion 24a of the bottom plate portion 24. A plurality of through holes 47 (two in each of the substrates 43a and 43b in the present embodiment) are provided along the circumferential direction in the radial center portion.

Each LED light source module 44 is arranged in the light source mounting portion 24a so that the end portion 43a2 and the end portion 43b3 and the end portion 43a3 and the end portion 43b2 face each other in the circumferential direction. Further, each LED light source module 44 has a connector 45 which is a connection portion for electrically connecting the wiring extending from the power supply unit 31 when the end portions 43a3 and the end portions 43b2 are arranged so as to face each other. ing. The connector 45 is a connector for supplying power to a plurality of LED elements 42 arranged in each LED light source module 44. As shown in FIG. 4, the connector 45 is arranged at a position overlapping with the power supply unit 31 in a plan view. Further, it is also possible to connect the LED light source modules 44 with connecting parts that are electrically or mechanically connected to form a plurality of LED light source modules 44 into one unit. By arranging the two LED light source modules 44 having a substantially semicircular shape on the light source mounting portion 24a with their ends facing each other, the light source portion 41 having a substantially circular shape can be formed. Each LED light source module 44 is electrically connected to the power supply unit 31 by connecting the corresponding wiring (not shown) to each connector 45. Since the back surface of the mounting surface of the substrate 43 of each LED light source module 44 is fixed in contact with the flat surface of each light source mounting portion 24a, when each LED light source module 44 generates heat, the LED light source module 44 The heat is transferred to the instrument body 21 and the instrument top cover 61. When the ambient temperature is lower than the temperature of the instrument body 21, the heat transferred to the instrument body 21 is transferred to the air around the instrument body 21. As a result, the heat transferred to the instrument body 21 is dissipated to the periphery of the instrument body 21.
The LED light source module 44 may be attached to the light source mounting portion 24a via a heat conductive sheet (not shown) or thermal paste, whereby higher heat dissipation can be obtained.

Further, in the present embodiment, a surface-mounted LED element, which is an example of a light emitting element, is used as a light source, but the type of the light source is not limited to the LED element, for example, a COB type light emitting module, an organic EL element (OLED), or the like. Even so, it is feasible.
Further, each of the substrate 43a and the substrate 43b is provided with a plurality of (two in this embodiment) circular through holes 47 in the central portion in the radial direction. For example, when the instrument main body 21 is provided so as to have a plurality of circular convex portions 24g (four in the present embodiment) in the light source mounting portion 24a as shown in FIG. 6, the through holes 47 are provided in the convex portions 24g. It is also possible to lock and position. By locking the through hole 47 of the substrate 43 to the convex portion 24g of the light source mounting portion 24a, the LED light source module 44 can be easily arranged at a predetermined position in the light source mounting portion 24a.

In the LED light source module 44 of the present embodiment, a plurality of LED elements 42 are arranged side by side in a substantially concentric circle (two rows on the inner side in the radial direction and the outer side in the radial direction of the substrate 43).

The translucent cover 51 is a member attached to the instrument main body 21 so as to cover the irradiation surface side of the instrument main body 21 and distributes light to the outside while reflecting and diffusing the light from the light source unit 41. The translucent cover 51 includes a shade and the like. The translucent cover 51 is made of a translucent resin material. The overall shape of the translucent cover 51 has a circular planar shape and gently swells toward the lower surface in a dome shape. The translucent cover 51 has a structure that can be attached to and detached from the instrument main body 21 for cleaning the inside of the translucent cover 51, replacing parts of the instrument main body 21, and the like. A held portion 52 for attaching the translucent cover 51 to the flange portion 27 of the instrument main body 21 is formed at the opening edge portion on the upper surface side of the translucent cover 51. The shape of the translucent cover 51 in the present embodiment is an example, and may be a dome shape, a cylindrical shape, a square tubular shape, or the like.

The instrument body 21 is provided with a holding portion 29, which is a mounting bracket for holding the held portion of the translucent cover 51. Although details are omitted, when the translucent cover 51 is arranged at the mounting position of the instrument main body 21 and rotated in one of the circumferential directions of the translucent cover 51, the held portion 52 of the translucent cover 51 becomes the instrument. The translucent cover 51 is held by the holding portion 29 of the main body 21 and attached to the instrument main body 21. Further, when the translucent cover 51 is rotated to the other side in the circumferential direction while the translucent cover 51 is attached to the instrument main body 21, the held portion 52 of the translucent cover 51 becomes the holding portion of the instrument main body 21. The translucent cover 51 can be removed from the instrument body 21 by disengaging from 29.

The instrument upper cover 61 is a member that covers at least a part (for example, the accommodating portion 26) on the mounting surface side of the instrument main body 21. The instrument upper cover 61 has a circular outer shape in a plan view and a concave shape upward in a cross-sectional view, and is formed so as to project toward the mounting surface side. In the present embodiment, the instrument upper cover 61 covers the entire mounting surface side of the power supply unit 31 and a part of the mounting surface side of the mounting unit 71. The instrument upper cover 61 has a substantially circular outer contour shape in a plan view. The instrument upper cover 61 holds the instrument body 21, the mounting portion 71, and the like on the irradiation surface side. The instrument upper cover 61 is attached to the mounting surface side of the accommodating portion 26 of the instrument body 21. Further, a mounting portion 71 for mounting a wiring component 110 such as an adapter is attached to the central portion of the instrument upper cover 61 on the irradiation surface side. The instrument upper cover 61 has a mounting hole 64, a peripheral edge portion 65, a top plate portion 66, a peripheral wall portion 67, and an instrument mounting portion 68 formed around the peripheral wall portion 67, and is integrally as a single member. It is formed. The instrument upper cover 61 is made of iron or aluminum in consideration of durability and strength capable of holding the instrument body 21 and the mounting portion 71, and thermal conductivity for dissipating heat generated by the power supply unit 31 and the light source unit 41. , Or a metal plate such as an alloy thereof. The instrument upper cover 61 is not limited to the metal material described above as long as it is a material having high durability, strength and heat dissipation, and can be formed of other materials such as other alloy materials and resins.
In the present embodiment, the peripheral edge portion 65, the top plate portion 66, the peripheral wall portion 67, and the instrument mounting portion 68 are integrally formed as the instrument upper cover 61, but the present invention is not particularly limited, and each of the above is not particularly limited. Each component may be assembled and configured.

The mounting hole 64 is a circular opening portion through which a wiring component 110 such as an adapter is inserted when the lighting fixture 11 is mounted on the ceiling. The mounting hole 64 is provided at a position centered in the radial direction of the instrument upper cover 61.

The peripheral edge portion 65 is a peripheral edge portion of the mounting hole 64, and is a portion to which one end (upper end) of the mounting portion 71 is mounted. The peripheral edge portion 65 is an annular portion that protrudes downward and has a predetermined width. The peripheral edge portion 65 is provided with a through hole 65a for fitting the claw portion 74 of the mounting portion 71. In the present embodiment, a plurality of (two in the present embodiment) through holes 65a arranged at equal intervals along the circumferential direction of the peripheral edge portion 65 are provided. The peripheral edge portion 65 is provided with a plurality of (two in this embodiment) first screw fixing portions 65b for fixing the mounting portion 71 with a fixing member such as a screw member. By fitting the claw portion 74 of the mounting portion 71 into the through hole 65a provided in the peripheral edge portion 65, the mounting portion 71 is positioned at a predetermined position of the peripheral edge portion 65, and the mounting portion 71 is the first screw. It is fixed to the fixing portion 65b by a fixing member. That is, the mounting portion 71 is temporarily fixed by fitting the claw portion 74 into the through hole 65a, and is fixed to the first screw fixing portion 65b of the peripheral portion 65 by the fixing member.

The peripheral edge portion 65 is provided with a pair of resectable knockout portions 65c for the QL stat. The knockout portion 65c includes a large diameter portion 65c1 and a slit portion 65c2 connected to the large diameter portion 65c1. When mounting the lighting fixture 11 on the mounting surface using the QL stat, which is a mounting bracket for mounting the lighting fixture, the knockout portion 65c is punched out with the tip of a screwdriver or the like to penetrate the knockout portion 65c to form a mounting hole. be able to. The QL stat is a mounting bracket provided in an annular shape so as to surround the hook ceiling body fixed to the ceiling. After fixing the QL stat to the ceiling, the instrument main body 21 is fixed to the QL stat with a screw member using the knockout portion 65c.

The top plate portion 66 is a flat portion formed in an annular shape around the peripheral edge portion 65.

The peripheral wall portion 67 is a tapered portion whose diameter is increased downward from the outer peripheral edge of the top plate portion 66.

The instrument mounting portion 68 is a collar-shaped portion extending radially outward from the four sides of the lower end of the peripheral wall portion 67. A plurality (four in this embodiment) of the instrument mounting portions 68 are provided around the lower end of the peripheral wall portion 67 at substantially equal intervals. Further, the plurality of instrument mounting portions 68 are alternately arranged with a plurality of (four in this embodiment) notches 69 in the circumferential direction of the peripheral wall portion 67. The instrument mounting portion 68 has a screw fixing portion 68a and is attached to the flange portion 27 of the instrument main body 21 by a fixing member.

The notch 69 of the instrument mounting portion 68 has a length dimension in the circumferential direction corresponding to the length dimension in the longitudinal direction of the cushioning material 30, and when the instrument upper cover 61 is attached to the instrument main body 21, the instrument is attached. The cushioning material 30 can be attached to a predetermined position of the flange portion 27 of the instrument main body 21 with reference to the position of the notch portion 69 in the flange portion 27 of the main body 21. This makes it possible to improve the visibility of the mounting position (pasting position) of the cushioning material 30. That is, the cushioning material 30 can be easily positioned on the flange portion 27 of the instrument main body 21.

Specifically, the cushioning material 30 is attached in the vicinity of the inner circumference of the flange portion 27 of the instrument main body 21 in a state of being close to the top of the notch portion 69 having a substantially arc shape in a plan view. The cushioning material 30 is an elongated rectangular parallelepiped, and is attached to the flange portion 27 of the instrument body 21 so that the longitudinal direction of the cushioning material 30 is orthogonal to the radial direction of the instrument body 21. It is preferable to attach the cushioning material 30 to the instrument main body 21 in which the light source unit 41 is held, because it prevents rattling of the instrument main body 21 and stabilizes the position of the light source unit 41.

The instrument upper cover 61 is attached with the instrument attachment portion 68 in contact with the vicinity of the inner circumference of the flange portion 27 of the instrument body 21 with the attachment portion 71 attached. By attaching the instrument upper cover 61 to the instrument body 21 so as to overlap the accommodating portion 26 in a plan view, a part of the attachment portion 71 is arranged so as to be exposed from the opening 22 of the instrument body 21. Further, a predetermined space is formed by the equipment upper cover 61 and the accommodating portion 26 (bottom plate portion 24), and the height and width for accommodating the power supply unit 31 and the mounting portion 71 are secured in the space. In the instrument upper cover 61, the power supply unit 31 (power supply case 35) is arranged so as to be adjacent to the mounting unit 71 (see FIG. 11).

The mounting portion 71 is a portion for mounting a wiring component 110 such as a hook sealing adapter. As shown in FIG. 10, the mounting portion 71 has a cylindrical portion 72 having a diameter larger than the opening 22 of the instrument main body 21, and an annular portion 73 extending radially inward from one end (upper end) of the cylindrical portion 72. have. The annular portion 73 is provided with a screw fixing portion 75 for fixing one end (upper end) of the mounting portion 71 to the first screw fixing portion 65b of the instrument upper cover 61 by a fixing member such as a screw. On the mounting surface side of the annular portion 73, a plurality of (two in this embodiment) claw portions 74 fitted in the through holes 65a provided in the instrument upper cover 61 (peripheral portion 65) project upward. It is provided. The plurality of claw portions 74 are arranged on the same circumference. The claw portion 74 can be fitted into the through hole 65a of the instrument main body 21. By rotating the mounting portion 71 with the claw portion 74 inserted through the through hole 65a, the claw portion 74 can be fitted into the through hole 65a. In this way, the mounting portion 71 can be easily attached to the instrument upper cover 61. After the fitting, the mounting portion 71 is fixed to the peripheral portion 65 of the instrument upper cover 61 by a fixing member such as a screw. The mounting portion 71 is fixed so as to be sandwiched between the accommodating portion 26 of the instrument main body 21 and the instrument upper cover 61.

The annular portion 73 is provided with an elongated hole 77 at a position corresponding to the pair of knockout portions 65c. Thereby, by cutting off the pair of knockout portions 65c, it is possible to form a mounting hole for the QL stat.

The cylindrical portion 72 is provided with a power supply side connector guide portion 76 to which the power supply side connector portion 37 of the power supply unit 31 can be combined (see FIG. 10). By combining the power feeding side connector portion 37 with the feeding side connector guide portion 76, the feeding side connector 34 is arranged inside the mounting portion 71 (see FIG. 11).

As an example of attaching the lighting fixture 11 to the ceiling, a wiring component 110 such as an adapter is attached to the ceiling wiring fixture (hook ceiling body) for the lighting fixture, and the wiring component 110 is inserted into the mounting hole 64 of the fixture upper cover 61. The wiring component 110 is fitted in the mounting portion 71.

The receiving unit 81 is arranged on the power supply board 33 of the power supply unit 31 described above. The receiving unit 81 is a portion that receives a wireless signal (infrared signal in this embodiment) from a remote controller (not shown). The receiving unit 81 has a light receiving element 82 which is a light receiving unit and a channel changeover switch 83. The light receiving element 82 is mounted in the vicinity of the central portion in the longitudinal direction of the power supply board 33 of the power supply unit 31. The light receiving element 82 is mounted so as to have the same orientation as the LED element 42 of the light source unit 41 (the light receiving surface of the light receiving element 82 and the light emitting surface of the LED element 42 have the same orientation). The channel changeover switch 83 is mounted on the irradiation surface side of the power supply board 33 of the power supply unit 31, the central portion in the longitudinal direction thereof, and the arcuate end portion of the power supply board 33. The light receiving element 82 is arranged so as to overlap the light receiving window 24c of the instrument main body 21 in a plan view. The receiving unit 81 is electrically connected to the power supply board 33. The light receiving element 82 can receive a remote control signal using a wireless signal transmitted from a remote control operated by the user as a transmission medium. By transmitting a predetermined signal to the light receiving element 82 by the remote control, the user can remotely control the lighting, extinguishing, dimming, etc. of the LED light source module 44 (LED element 42).
Further, in the present embodiment, the receiving unit 81 for receiving the remote control signal is provided, but the present invention is not limited to this, and other sensor control methods may be adopted. Further, instead of the control by the wireless signal, the control may be by wire, and in that case, the receiving unit may not be provided.

The protective cover 91 is a member that covers the light source unit 41 between the instrument main body 21 and the translucent cover 51. The protective cover 91 is also called a light diffusion cover. The protective cover 91 is arranged between the light source unit 41 and the translucent cover 51. The protective cover 91 has a translucent property, and is formed of, for example, a translucent resin material. The protective cover 91 is a substantially annular member in a plan view, and mainly has an inner peripheral edge portion 92, a light source cover portion 93, and an outer peripheral edge portion 94, as shown in FIGS. 12 and 13. The protective cover 91 can substantially cover the irradiation surface side of the bottom plate portion 24 of the instrument main body 21.

The inner peripheral edge portion 92 is a substantially annular portion arranged in the center of the protective cover 91. When the protective cover 91 is attached to the instrument main body 21, the inner peripheral edge portion 92 of the protective cover 91 is in contact with or close to the irradiation surface side of the inner peripheral edge portion of the bottom plate portion 24 of the instrument body 21 with almost no gap. do.
In the following description, the state of "contacting or approaching with almost no gap" is simply referred to as "contacting". In the following description, what is expressed as "contacting" also includes a state of "approaching with almost no gap".

The light source cover portion 93 is an annular shape in a plan view, is formed continuously on the radial outer side of the inner peripheral edge portion 92, and has a predetermined gap with respect to the light source portion 41. The light source cover portion 93 is formed in order from the inner peripheral side to the first lens portion 95 which is annular in a plan view and has a convex shape toward the irradiation surface, and the first lens portion 95 which is continuously formed on the outer side in the radial direction. A flat portion 96 having a substantially annular shape in a plan view having a predetermined width, and a second lens portion 97 having a convex shape toward the irradiation surface side in a plan view annular shape continuously formed outside the flat portion 96 in the radial direction. have. The first lens portion 95 and the second lens portion 97 of the present embodiment have a plurality of ribs 98 having an annular shape in a plan view, and have a shape in which a plurality of peaks and grooves are alternately formed substantially concentrically. The first lens unit 95 is arranged at a position where it overlaps with the LED element 42 arranged radially inside among the plurality of LED elements 42 arranged substantially concentrically on the substrate 43 of the LED light source module 44 in a plan view. The second lens unit 97 is arranged at a position where it overlaps with the LED element 42 arranged on the outer side in the radial direction among the plurality of LED elements 42 arranged substantially concentrically on the substrate 43 of the LED light source module 44. ..

Although the details will be described later, when the light emitted from the plurality of LED elements 42 passes through, the first lens unit 95 and the second lens unit 97 distribute the light to the outside while reflecting and diffusing the light. In this way, the first lens unit 95 and the second lens unit 97 can increase the light balance in the translucent cover 51.

In the protective cover 91, the first lens portion 95 and the second lens portion 97 continuously cover a plurality of LED elements 42 arranged in an annular shape on the substrate 43. Therefore, even if the number of arrangements of the LED elements 42 and the arrangement interval are changed, such as when the specifications of the lighting equipment (for example, the number of compatible tatami mats) are changed, the positions where the LED elements 42 overlap in a plan view are sufficient. Light control is possible by the first lens unit 95 and the second lens unit 97, and the versatility is excellent.

The inner peripheral edge portion 92, the light source cover portion 93, and the outer peripheral edge portion 94 can be integrally formed by injection molding using a mold, for example, using a translucent resin such as an acrylic resin or a polycarbonate resin. Is.

The outer peripheral edge portion 94 is a substantially annular portion formed continuously around the light source cover portion 93 (second lens portion 97). The outer peripheral edge portion 94 is provided with a plurality of hook-shaped claw portions 94a for fitting into the plurality of through holes 24d provided on the outer peripheral side of the bottom plate portion 24 of the instrument main body 21. The claw portion 94a can sandwich the end portion of the through hole 24d on the outer peripheral side of the bottom plate portion 24. When the claw portion 94a is fitted into the through hole 24d, the outer peripheral edge portion 94 of the protective cover 91 comes into contact with the irradiation surface side of the outer peripheral edge portion of the bottom plate portion 24 of the instrument main body 21.
In the present embodiment, the claw portion 94a is provided on the outer peripheral edge portion 94 of the protective cover 91, but the present invention is not limited to this, and the inner peripheral edge portion 92 of the protective cover 91, or both the inner peripheral edge portion 92 and the outer peripheral edge portion 94. It may be provided in.

Next, the features of the first lens unit 95 and the second lens unit 97 described above will be described in detail with reference to the drawings.
As shown in FIGS. 15 to 17, the first lens portion 95 has a flat plate-shaped base portion 95a and a diffusion portion 95b. The first lens portion 95 is formed at a position where it overlaps a row of LED elements 42 arranged in an annular shape in the radial direction in a plan view.
The second lens portion 97 includes a flat plate-shaped base portion 97a and a diffuser portion 97b. The second lens portion 97 is formed at a position where it overlaps a row of LED elements 42 arranged in an annular shape on the outer side in the radial direction in a plan view.
The mounting surface side (rear surface side) of the base portion 95a and the flat portion 96 of the first lens portion 95 and the base portion 97a of the second lens portion 97 has a planar shape continuous from the flat surface on the mounting surface side (rear surface side) of the flat portion 96. It has become.
The first lens portion 95 and the second lens portion 97 have the same shape in cross-sectional view.

The base portion 95a (97a) is a flat plate-shaped portion having a predetermined thickness in a cross-sectional view, and is a flat incident surface 95a1 (97a1) that covers the LED element 42 on the mounting surface side and is incident with the light emitted from the LED element 42. Have. The diffusion portion 95b (97b) is a portion formed on the irradiation surface side of the base portion 95a (97a), which is convex toward the irradiation surface side and has a cross-sectional view sawtooth shape, and is an incident surface 95a1 (97a1) on the irradiation surface side. It has an emission surface 95b1 (97b1) from which light incident from the light is emitted. The emitting surface 95b1 (97b1) has a light diffusing function of diffusing the light incident from the incident surface 95a1 (97a1). The base portion 95a and the diffusion portion 95b are integrally formed to form a medium portion through which light incident from the incident surface 95a1 (97a1) propagates.

As shown by the dotted line portion in FIG. 17, the diffusing portion 95b (97b) is provided on the irradiation surface side of the base portion 95a (97a) and is a portion for diffusing the light emitted from the LED element 42. The diffusion portion 95b (97b) has a plurality of (14 in this embodiment) ribs 98, and the plurality of ribs 98 extend along the direction along the row of the LED elements 42. The plurality of ribs 98 are arranged so as to have a line-symmetrical shape with respect to the optical axis C of the LED element 42 in the radial cross-sectional view of the first lens portion 95 (second lens portion 97). Each rib 98 is convex toward the irradiation surface side, and has an inclined surface 98a, a rib tip portion 98b, and a wall surface 98c. The tip of the inclined surface 98a is connected to the tip of the wall surface 98c via the rib tip portion 98b having a substantially arcuate cross-sectional view. The inclined surface 98a is a surface inclined at a predetermined angle with respect to the optical axis C. The wall surface 98c is a plane substantially parallel to the optical axis C. The plurality of ribs 98 are connected via a rib connecting portion 98d which is a bottom portion formed between the ribs. That is, the base end of the wall surface 98c is connected to the base end of the inclined surface 98a via the rib connecting portion 98d. The angle formed by the inclined surface 98a and the wall surface 98c is an acute angle. Further, the angle formed by the inclined surface 98a, the rib connecting portion 98d, and the wall surface 98c is an acute angle. The inclined surface 98a and the wall surface 98c are arranged so as to alternately repeat in a direction away from the optical axis C of the LED element 42 in the radial direction and the radial direction outside. The rib tip portion 98b and the rib connecting portion 98d are also arranged so as to be repeated alternately.
In the present embodiment, the rib tip portion 98b is formed in a substantially arc shape in a cross-sectional view, and the rib connecting portion 98d is formed in an acute angle shape in a cross-sectional view, but the respective shapes are not limited to the present embodiment. For example, depending on the light distribution control, it can be appropriately formed into a substantially arcuate cross-sectional view or an acute-angled cross-sectional view.

With reference to FIG. 18, the light distribution control in the first lens unit 95 and the second lens unit 97 of the present embodiment will be described. The inclined surface 98a of the present embodiment can reflect a part of the light emitted from the corresponding LED element 42. As shown in FIG. 18, a part of the light emitted from the LED element 42 is incident on the incident surface 95a1 (97a1), refracted, and travels from the base 95a (97a) to the emitted surface 95b1 (97b1) side. The light traveling toward the exit surface 95b1 (97b1) is reflected by the inclined surface 98a and diffuses in the radial inside or the radial outside of the luminaire 1. In this way, the first lens unit 95 and the second lens unit 97 diffuse the light emitted from the LED element 42 radially inside or outside the luminaire 11. In the first lens portion 95 and the second lens portion 97, a plurality of concentric ribs 98 formed on the exit surface 95b1 (97b1) are continuously arranged in the radial direction of the protective cover 91, and are arranged in a row of LED elements 42. It extends in the circumferential direction so as to overlap in a plan view. By adjusting the shapes of the plurality of ribs 98, it is possible to control the light distribution in the radial direction of the protective cover 91. That is, since the plurality of ribs 98 of the first lens unit 95 and the second lens unit 97 are arranged so as to have a line-symmetrical shape with respect to the optical axis C of the LED element 42, the LED element 42 comes out. The emitted light can be uniformly distributed to the light that goes radially inward and the light that goes outward in the radial direction from the optical axis C of the LED element 42, and the light emitted from the LED element 42 can be diffused and uniformly. It is possible to obtain various illumination lights. Further, since the first lens portion 95 and the second lens portion 97 are formed by providing a plurality of ribs 98 so that the portion for controlling the light distribution is finely divided, a thick portion is unlikely to occur. Therefore, the residual stress is less likely to remain in the protective cover 91 as compared with the shape like the ridge portion 1095 shown in FIG. 22, and it is possible to suppress molding defects and performance deterioration due to the residual stress.
The shape of the plurality of ribs 98 is not limited to the shape of the present embodiment, and is, for example, the pitch of the ribs (diametrical dimension between the ribs) and the height dimension of the ribs (base end portion of the rib and the rib). The desired light distribution control can be performed by appropriately setting the vertical dimension with the tip portion) and the like.
The wall surface 98c of the plurality of ribs 98 of the present embodiment is provided so as to be substantially parallel to the optical axis C of the corresponding LED element 42 in a cross-sectional view, but the present invention is not limited to this. However, such a configuration can reduce the area where the wall surface 98c is provided in a plan view. Therefore, it is preferable because the inclined surface 98a, which is a portion that reflects the light emitted from the LED element 42 and distributes the light radially outside or radially inside, can be arranged more efficiently.

Next, another embodiment of the lens portion according to the present invention will be described with reference to FIGS. 19 to 21.
The first lens portion 105 and the second lens portion 107 described below are provided in place of the first lens portion 95 and the second lens portion 97 of the protective cover 91 described above, and other configurations are protected. Since it is the same as the cover 91, the description of other parts will be omitted.

As shown in FIG. 19, the first lens portion 105 has a flat plate-shaped base portion 105a and a diffusion portion 105b. The first lens portion 105 is formed along a row of LED elements 42 (first LED element row) arranged in an annular shape in the radial direction.
As shown in FIG. 20, the second lens portion 107 has a flat plate-shaped base portion 107a and a diffusion portion 107b. The second lens portion 107 is formed along a row of LED elements 42 (second LED element row) arranged in an annular shape on the outer side in the radial direction.
The mounting surface side (rear surface side) of the base portion 105a and the flat portion 96 of the first lens portion 105 and the base portion 107a of the second lens portion 107 has a planar shape continuous from the flat surface on the mounting surface side (rear surface side) of the flat portion 96. It has become.
As shown in FIGS. 19 and 20, the first lens portion 105 and the second lens portion 107 have a line-symmetrical shape in a cross-sectional view.

The base portion 105a (107a) is a flat plate-shaped portion having a predetermined thickness in a cross-sectional view, and is a flat incident surface 105a1 (107a1) that covers the LED element 42 on the mounting surface side and is incident with the light emitted from the LED element 42. Have. The diffusing portion 105b (107b) is a portion formed on the irradiation surface side of the base portion 105a (107a) and is convex toward the irradiation surface side, and light incident on the irradiation surface side from the incident surface 105a1 (107a1) is emitted. It has an exit surface 105b1 (107b1) to emit light. The emission surface 105b1 (107b1) has a light diffusing function of diffusing the light incident from the incident surface 105a1 (107a1). The base portion 105a (107a) and the diffusion portion 105b (107b) are integrally formed to form a medium portion through which light incident from the incident surface 105a1 (107a1) propagates.

As shown by the dotted line portions in FIGS. 19 and 20, the diffusion portion 105b (107b) is provided on the irradiation surface side of the base portion 105a (107a) and is a portion for diffusing the light emitted from the LED element 42. .. The diffusion portion 105b (107b) is formed at a position where it overlaps a row of LED elements 42 arranged in an annular shape in a plan view in a plan view. The first lens portion 105 and the second lens portion 107 of the present embodiment have a plurality of (11 in this embodiment) ribs 108 in a plan view annular shape, and a plurality of peaks and grooves are alternately arranged substantially concentrically. It is a shape formed in. The plurality of ribs 108 extend along the direction along the row of the LED elements 42. The plurality of ribs 108 are arranged so as to have an asymmetric shape with respect to the optical axis C of the LED element 42 in the radial cross-sectional view of the first lens portion 105 (second lens portion 107). Each rib 108 is convex toward the irradiation surface side, and has an inclined surface 108a, a rib tip portion 108b, and a wall surface 108c. The tip of the inclined surface 108a is connected to the tip of the wall surface 108c via the rib tip portion 108b having a substantially arc-shaped cross section. The inclined surface 108a is a surface inclined at a predetermined angle with respect to the optical axis C. The wall surface 108c is a plane substantially parallel to the optical axis C. The plurality of ribs 108 are connected via a rib connecting portion 108d which is a bottom portion formed between the ribs. That is, the base end of the wall surface 108c is connected to the base end of the inclined surface 108a via the rib connecting portion 108d. The angle formed by the inclined surface 108a and the wall surface 108c is an acute angle. Further, the angle formed by the inclined surface 108a, the rib connecting portion 108d, and the wall surface 108c is an acute angle. The inclined surface 108a and the wall surface 108c are from the axis (axis C1 in the first lens portion 105, axis C2 in the second lens portion 107) at a position deviated from the optical axis C of the LED element 42 in the radial direction of the protective cover 91. They are arranged so as to repeat alternately in the direction of separation. Specifically, in the first lens unit 105, the inclined surface of the corresponding LED element 42 (LED element 42 on the inner peripheral side) is separated from the axis C1 located at a position displaced outward in the radial direction from the optical axis C. The 108a and the wall surface 108c are arranged so as to repeat alternately. In the second lens unit 107, the inclined surface 108a and the wall surface 108c alternate in a direction away from the axis C2 located radially inward from the optical axis C of the corresponding LED element 42 (LED element 42 on the outer peripheral side). It is arranged to repeat in. The rib tip portion 108b and the rib connecting portion 108d are also arranged so as to be repeated alternately.
In the present embodiment, the rib tip portion 108b is formed in a substantially arc shape in a cross-sectional view, and the rib connecting portion 108d is formed in an acute-angled cross-sectional view, but the respective shapes are not limited to the present embodiment. For example, depending on the light distribution control, it can be appropriately formed into a substantially arcuate cross-sectional view or an acute-angled cross-sectional view.

In the first lens portion 105 and the second lens portion 107, a plurality of concentric ribs 98 formed on the exit surface 105b1 (107b1) are continuously arranged in the radial direction of the protective cover 91, and a row of LED elements 42 is arranged. It extends in the circumferential direction along. By adjusting the shapes of the plurality of ribs 108, it is possible to control the light distribution in the radial direction of the protective cover 91. That is, since the plurality of ribs 108 of the first lens unit 105 and the second lens unit 107 are arranged so as to have an asymmetric shape with respect to the optical axis C of the LED element 42, the emitted light of the LED element 42 Is able to diffuse the light emitted from the LED element 42 by controlling the light distribution to the light that goes radially inward and the light that goes outward in the radial direction from the optical axis C of the LED element 42. Can illuminate a uniform illumination light.

Specifically, the shape of the diffuser portion 105b (107b) differs depending on the radial position of the first lens portion 105 (second lens portion 107). In the first lens unit 105, the light distribution angles of the plurality of (six in the present embodiment) ribs 108 provided on the inner side in the radial direction among the plurality of ribs 108 (direction of the axis of light distribution of the emitted light). Is inclined inward in the radial direction with respect to the optical axis C of the LED element 42. Further, the light distribution direction of the plurality of (five in this embodiment) ribs 108 provided on the radial outer side of the plurality of ribs 108 is inclined outward in the radial direction with respect to the optical axis C of the LED element 42. are doing. Further, in the second lens unit 107, the light distribution direction (the axis of the light distribution of the emitted light) of the plurality of (five in this embodiment) ribs 108 provided on the inner side in the radial direction among the plurality of ribs 108. (Orientation) is inclined inward in the radial direction with respect to the optical axis C of the LED element 42. Further, the light distribution direction of the plurality of (six in the present embodiment) ribs 108 provided on the radial outer side of the plurality of ribs 108 is inclined outward in the radial direction with respect to the optical axis C of the LED element 42. are doing.

The light distribution control in the first lens unit 105 of the present embodiment will be described with reference to FIG. 21. The second lens portion 107 has a line-symmetrical shape in cross-sectional view with the first lens portion 105. Therefore, the traveling of light in the radial direction of the instrument body 21 of the second lens unit 107 is equivalent to the line-symmetrical inversion of the traveling of light of the first lens unit 105 shown in FIG. 21, and the description thereof will be omitted. .. As shown in FIG. 21, a part of the light emitted from the LED element 42 is incident on the incident surface 105a1, is refracted, and travels from the base 105a to the emitted surface 105b1 side. The light that has traveled toward the emission surface 105b1 is reflected by the inclined surface 108a and diffuses in the radial inside or the radial outside of the luminaire 11. In the first lens unit 105 of the present embodiment, a plurality of inclined surfaces 108a are provided so as to be separated from the axis C1 displaced outward in the radial direction with respect to the optical axis C of the LED element 42. The light that reaches the inclined surface 108a radially inside the axis C1 is mainly controlled to distribute light inside the instrument body 21 in the radial direction. On the other hand, the light that reaches the inclined surface 108a radially outside the axis C1 is mainly controlled to be distributed outward in the radial direction of the instrument main body 21. With such a configuration, the region of the inclined surface 108a on the inner side in the radial direction with respect to the axis C1 becomes a region wider than the inclined surface 108a on the outer side in the radial direction. Therefore, as for the light emitted from the LED element 42, a large amount of light reaches the inclined surface 108a which is inclined in the radial inward direction rather than the radial outer side, and the light distribution is controlled. The light emitted from the LED element 42 is provided on one side in the radial direction by providing the plurality of ribs 108 in an asymmetrical shape with respect to the optical axis C, rather than providing the plurality of ribs 108 in a symmetrical shape with respect to the optical axis C. Easy to control the light distribution.

In the plurality of ribs 108 of the present embodiment, the height dimension of the rib 108 near the optical axis C is larger than that of the rib 108 near the inner side in the radial direction and the outer side in the radial direction. The inclination angle of the inclined surface 108a is set so that the light emitted from the LED element 42 can be reflected. Therefore, since the emission angle of the LED element 42 is steep in the vicinity of the optical axis C, the inclined surface 108a in the vicinity of the optical axis C is also adjusted to a steep angle when light control by reflection is obtained on the inclined surface 108a. Is preferable. In order to provide the inclined surface 108a at a steep angle, the height dimension of the rib 108 is increased, or the pitch (diametrical dimension between the ribs) of the rib 108 near the optical axis C is reduced to subdivide the inclined surface 108a. There is a way to make it. By configuring the plurality of ribs 108 in this way, a part of the light incident on the first lens portion 105 and the second lens portion 107 from the LED element 42 is diffused in the direction in which the inclined surface 108a is inclined in the radial direction. can do.
The shape of the plurality of ribs 108 is not limited to the shape of the present embodiment, and is, for example, the pitch of the ribs (diametrical dimension between the ribs) and the height dimension of the ribs (base end portion of the rib and the rib). The desired light distribution control can be performed by appropriately setting the vertical dimension with the tip portion) and the like.

In the present embodiment, the ribs are formed on one surface side (irradiation surface side) of the base portion, but depending on the light distribution control, for example, the other surface side of the base portion (the surface side facing the LED element 42). It can also be provided on one side and both sides of the other side of the base.

As described above, in the lighting fixture 11 of the present embodiment, desired light distribution control can be performed without providing a ridge portion as in Patent Document 1. That is, even when a light source such as an LED element 42 having strong directivity is used, the light is diffused to expand the light distribution, and the flat plate-shaped base portion 95a (97a) of the first lens portion 95 and the second lens portion 97 is used. By forming the diffusion portion 95b (97b) composed of the plurality of ribs 98, it is possible to suppress the thickening of the lens portion and obtain the desired light distribution performance. Further, since it is possible to suppress the thickening of the lens portion, it is possible to suppress an increase in the molding difficulty due to the uneven thickness in the resin molding for manufacturing the protective cover 91. In addition, molding defects and performance deterioration due to residual stress during resin molding of the protective cover 91 are suppressed.

11 Lighting equipment 21 Equipment body 41 Light source unit 42 LED element 43 Board 44 LED light source module 91 Protective cover (light diffusion cover)
95, 105 1st lens part 97,107 2nd lens part 98, 108 ribs

Claims (6)

A translucent light diffusion cover that covers the irradiation surface side of the light source of the lighting equipment.
The light source unit has at least one LED element sequence in which a plurality of LED elements are arranged side by side.
The light diffusion cover has a lens portion that is convex toward the irradiation surface side and overlaps with the LED element row in a plan view.
The lens unit is provided so as to correspond to one of the LED element trains.
The lens portion has a plurality of ribs that are continuously arranged in a predetermined direction, and the plurality of ribs extend in a direction along the LED element row.
Each of the plurality of ribs has an inclined surface inclined at a predetermined angle with respect to the optical axis of the LED element, and the optical axis of the LED element is more than the inclined surface of the rib outside the predetermined direction of the plurality of ribs. A light diffusion cover in which the inclined surface of the rib in the vicinity has a steep angle . The light diffusion cover according to claim 1, wherein the plurality of ribs have an asymmetrical shape with respect to the optical axis of the LED element in a cross-sectional view. The light diffusion cover according to claim 1, wherein the plurality of ribs have a symmetrical shape with respect to the optical axis of the LED element in a cross-sectional view. The light diffusion cover according to any one of claims 1 to 3, wherein the LED element sequence is annular. The light source unit has a first LED element sequence and a second LED element array.
The lens portion has a first lens portion and a second lens portion.
The first lens unit is provided so as to overlap with the first LED element row in a plan view.
The second lens portion is provided so as to overlap with the second LED element row in a plan view.
The light diffusion cover according to any one of claims 1 to 4. A lighting fixture having the light diffusion cover according to any one of claims 1 to 5.

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