JP7568535B2 - Lighting fixtures - Google Patents

Description

The present invention relates to a lighting fixture.

Patent document 1 discloses a bright footlight that does not produce glare.

The footlight disclosed in Patent Document 1 has a light-transmitting cover made of a light-shielding louver plate material attached to the irradiation opening of the main body of the fixture. The direct light emitted from the footlight is designed to mainly illuminate the feet and not enter the human eye.

Japanese Patent Application Publication No. 9-282911

However, when a highly directional light source such as an LED element is used in the configuration of the footlight in Patent Document 1, if the distance between the light source and the light-shielding louver plate material cannot be appropriately set, the light emitted from the light source will not be diffused sufficiently, and there is a risk that the light emitted from the footlight will have locally high brightness.

Therefore, the present invention was made in consideration of the above problems, and aims to provide a lighting device that reduces glare and achieves uniform light emission.

The problem that the present invention aims to solve is as described above, and the means for solving this problem will be explained next.

That is, the lighting fixture disclosed in the present application has:
The instrument body,
A light source unit disposed in a space formed inside the device body ;
an illumination opening formed in the fixture body and elongated horizontally to illuminate the light from the light source unit to the outside of the lighting fixture;
a light control member provided to close the irradiation opening in a state in which the space is formed ,
The light control member has a flat incident surface and an exit surface that is formed into a concave surface having an arch-shaped cross section.

In the lighting fixture disclosed in the present application,
the light control member is formed such that a central portion of the light exit surface in a longitudinal direction is recessed more than both end portions of the light exit surface,
both ends of the light control member in a longitudinal direction are disposed near both ends of the irradiation opening in a longitudinal direction ;
It is preferable that a central portion of the light control member in the longitudinal direction is disposed closer to the interior of the lighting fixture than both ends of the irradiation opening in the longitudinal direction .

In the lighting fixture disclosed in the present application,
It is preferable that the optical axis direction of the light source unit and the emission direction of the emission surface of the light control member are different .

In the lighting fixture disclosed in the present application,
It is preferable that the light control member has at least one wall portion intersecting the exit surface, and an end portion of the wall portion on the exit surface side is located close to an end portion of the irradiation opening in the up-down direction .

In the lighting fixture disclosed in the present application,
The light control member is preferably provided so that the emission surface faces the incidence surface .

The present invention provides a lighting fixture that reduces glare and achieves uniform light emission.

1 is a perspective view showing a lighting fixture according to an embodiment of the present invention. 1 is a perspective view showing a lighting fixture according to an embodiment of the present invention. 1 is a front view showing a lighting fixture according to an embodiment of the present invention. 4 is a cross-sectional view taken along line AA in FIG. 3. FIG. 2 is an exploded view showing a lighting fixture according to an embodiment of the present invention. FIG. FIG. 11 is an explanatory diagram for explaining a method of attaching a substrate to a device body. 5 is a cross-sectional view taken along line BB in FIG. 4 . 4A and 4B are diagrams showing a packing, in which FIG. 4A is a perspective view showing the rear side, and FIG. 4B is a perspective view showing the front side. 4A and 4B are diagrams showing the front side of a light control member, in which FIG. 4A is a perspective view of the light control member seen from the upper right, and FIG. 4B is a perspective view of the light control member seen from the lower left.

The lighting fixture 11 according to the embodiment of the present invention will be described with reference to Figs. 1 to 10. The lighting fixture 11 according to the present embodiment is a lighting fixture using an LED element 42 as a light source. The lighting fixture 11 can be used, for example, as a footlight (foot lamp) that is embedded in a mounting hole provided in a wall surface W, which is an example of a mounting surface, and illuminates a floor surface. In the following description, the lighting fixture 11 is mounted on a wall surface W as shown in Fig. 4, and the side of the lighting fixture 11 that is mounted on the wall surface W is described as the mounting surface side (back side) of the lighting fixture 11. The up-down direction in Figs. 1 to 3 will be described as the "up-down direction" of the lighting fixture 11. The left-right direction in Figs. 1 to 3 will be described as the "left-right direction" or "width direction" of the lighting fixture 11. The front-rear direction in Fig. 4 will be described as the "front-rear direction" of the lighting fixture 11. In the following description, the state in which the lighting fixture 11, etc. is viewed from above will be referred to as a plan view. In addition, the state in which the lighting fixture 11, etc. is viewed from the side will be referred to as a side view. Additionally, a cross-sectional view refers to the state in which the cross-sectional shape of the lighting fixture 11, etc. is viewed.

As shown in Figs. 1 to 5, the lighting fixture 11 has a horizontally elongated, generally rectangular shape when viewed from the front. The lighting fixture 11 mainly includes a fixture body 21, a power supply unit 31, a terminal block 35, a terminal block cover 36, a light source unit 41, a gasket 51 which is an example of an elastic member, a light control member 61, and an attachment spring 71.

The fixture body 21 has a horizontally long rectangular shape when viewed from the front. The fixture body 21 is a metal member that is concave and has an opening on the back side (rear side). The fixture body 21 is open on the bottom. The fixture body 21 is an example of a front cover that is placed on the front side of the lighting fixture 11. The fixture body 21 holds the top plate 28, power supply unit 31, terminal block 35, light source unit 41, packing 51, light control member 61, mounting spring 71, etc. The fixture body 21 is made of a material with high thermal conductivity, such as a metal material. In this embodiment, the fixture body 21 is made of an aluminum alloy as an example. This allows heat generated from the power supply unit 31 and the light source unit 41 to be dissipated.

The device body 21 mainly has a recess 22, a pair of board guides 23, a top plate mounting portion 24, and an irradiation opening 25.

The recess 22 is a substantially box-shaped portion with a bottom that is open on the back side (rear side) and the bottom side. The recess 22 is a portion for housing and arranging the light source unit 41, packing 51, light control member 61, wiring, etc., and has a depth and width sufficient to house these items inside. The recess 22 has a rectangular bottom 22a that closes the front side of the device body 21, and a side wall portion 22b that is substantially U-shaped in side view and is formed around the bottom 22a.

The board guide portion 23 is a U-shaped portion that protrudes from the bottom 22a of the recess 22 toward the rear side. The board guide portion 23 is intended to guide the light source portion 41 to a predetermined position on the rear side of the bottom 22a of the recess 22. The board guide portion 23 is disposed near both ends of the bottom 22a in the left-right direction. The board guide portion 23 is disposed approximately in the center of the bottom 22a in the up-down direction. The board guide portion 23 engages both longitudinal ends of the board 43 of the light source portion 41, and the light source portion 41 is positioned relative to the fixture body 21.
Although the board guide portion 23 in the present embodiment is provided in a U-shape, it may be formed in a shape other than the U-shape. For example, it may be provided in a linear shape or in a shape that sandwiches a part of the board 43 of the light source unit 41.

The top plate attachment parts 24 are multiple bosses that protrude toward the rear side and are provided on the bottom 22a of the recess 22. The top plate attachment parts 24 are formed to correspond to the through holes 28a, 28b of the top plate 28. The top plate 28 is attached to the top plate attachment parts 24 by attachment members 30 such as screws.

The irradiation opening 25 is an opening on the lower side of the device body 21. The irradiation opening 25 is a horizontally long portion that irradiates light from the light source unit 41 from the lower end of the lighting device 11 to the outside. The irradiation opening 25 is a portion that irradiates light emitted from the exit surface of the light control member 61 to the outside (see Figure 4).

4 and 5, the top plate 28 is a flat plate-shaped member that separates the light source unit 41 and the power supply unit 31. The top plate 28 is an example of a partition plate of the present invention. The top plate 28 is a member that covers the back side of the device body 21 to which the packing 51 is attached. The top plate 28 is formed in a horizontally long rectangular shape whose dimensions in the vertical and width directions are slightly smaller than those of the packing 51. The top plate 28 has through holes 28a near the four corners through which the mounting members 30 such as screws are inserted, a through hole 28b provided approximately in the center in the left-right direction, and a notch hole 28c (see FIG. 6) that engages the convex portion 56b of the electric wire holding portion 56 of the packing 51. The notch hole 28c is formed so as to open a part of the upper end of the top plate 28. The front side of the top plate 28 is painted black. The top plate 28 is disposed on the rear side of the packing 51, and is first positioned by engaging the protrusion 56b of the packing 51 with the notch hole 28c, and is then attached to the top plate attachment portion 24 disposed in the center of the bottom portion 22a in the left-right direction by inserting the attachment member 30 such as a screw through the through hole 28b. Next, the through hole 33b of the power supply cover 33 is disposed so as to overlap with the through hole 28a of the top plate 28, and the attachment member 30 such as a screw is inserted through the through hole 33b and the through hole 28a, and is fastened together to the top plate attachment portion 24 of the fixture body 21. The extensions 33a and 33a of the power supply cover 33 and the top plate 28 are fastened together by the attachment member 30 and attached to the fixture body 21. As shown in FIG. 4, the top plate 28 and the fixture body 21 form a space S surrounding the light source unit 41. The top plate 28 has a reflective surface 28d that reflects the light emitted from the light source unit 41. The reflecting surface 28d faces the light source unit 41.

In the present embodiment, the front side (reflective surface 28d) of the top plate 28 is painted black. The reflective surface 28d painted black has a lower reflectance than those painted white or silver. Therefore, part of the light emitted from the light source is absorbed by the reflective surface 28d of the top plate 28, and part of the light is reflected and diffused into the space S before being emitted from the emission opening of the lighting fixture 11. As a result, the luminance of the light emitted from the lighting fixture 11 is reduced and the brightness is suppressed. Even when the lighting fixture 11 is turned on in the dark, the light emitted from the lighting fixture 11 is not too dazzling, so that it is unlikely to completely wake up a user who is in the middle of sleep, for example, to go to the toilet at night.
In addition, the reflecting surface 28d may be subjected to a reflective treatment such as white paint, silver paint, or shiny metal plating in order to efficiently reflect light. The reflecting surface 28d may be formed with a concave curved surface or an inclined surface so as to guide the light toward the exit opening of the device body 21. The reflecting surface 28d may be processed to have a dimple shape, for example. Furthermore, the reflecting surface 28d may be formed with fine irregularities on the surface by roughening (e.g., embossing). The shape of the reflecting surface 28d can be appropriately changed to obtain the desired irradiation light. The reflecting surface 28d may diffuse light.

The power supply unit 31 is a power supply device for supplying power to the LED element 42 of the light source unit 41 to light up the LED element 42. The power supply unit 31 is disposed behind (on the rear side) the light source unit 41 in the fixture body 21. The power supply unit 31 has a power supply circuit unit 32 and a power supply cover 33 that covers the power supply circuit unit 32. The power supply circuit unit 32 is a power supply circuit in which a plurality of electronic components are mounted on a printed wiring board processed into a rectangular shape, housed in an insulating case having a substantially rectangular parallelepiped shape. The power supply cover 33 is a bottomed box-shaped metal member that covers the periphery of the power supply circuit unit 32. The power supply cover 33 has extensions 33a and 33a that extend in the left and right directions from a part of the end of the bottomed box-shaped part that covers the periphery of the power supply circuit unit 32, and spring attachments 34 and 34 to which the attachment spring 71 is attached. The extensions 33a are provided with screw attachments 33b and 33b, which are through holes. The extensions 33a and 33a of the power supply cover 33 and the top plate 28 are fastened together to the top plate mounting portion 24 of the fixture body 21 by means of mounting members 30 such as screws. This improves the workability of assembling the lighting fixture 11 and reduces the number of parts. The spring mounting portions 34 and 34 have a pair of upper and lower protrusions 34a and 34a for positioning the base end of the mounting spring 71. The pair of upper and lower protrusions 34a and 34a is not essential, and the protrusions 34a may not be provided, or one protrusion 34a may be provided on each of the spring mounting portions 34. As shown in FIG. 4, the power supply unit 31 is disposed so as to face the mounting surface side on which the LED elements 42 of the substrate 43 of the light source unit 41 are mounted. The power supply unit 31 is for converting AC current supplied from an external commercial power source via wiring into a predetermined DC current and supplying the converted current to the LED elements 42. The power supply unit 31 is electrically connected to the terminal block 35 via an electric wire.

The terminal block 35 has a pair of convex parts 35a arranged vertically for positioning the terminal block 35 with respect to the power supply cover 33, and a through hole 35b provided between the pair of convex parts 35a. The terminal block 35 is positioned by inserting the convex parts 35a into the through hole 33c of the power supply cover 33, and is attached to the back side of the power supply cover 33 by inserting a mounting member 37 such as a screw into the through hole 35b. For example, when attaching the lighting fixture 11 to the wall surface W, the wiring extending from the terminal block 35 is connected in advance to the wiring for an external commercial power supply (not shown) on the back side of the wall surface W, so that the power supply unit 31 is electrically connected to the external commercial power supply. The power supply unit 31 and the light source unit 41 are electrically connected by wiring (electric wires). The terminal block cover 36 is a bottomed box made of resin and has an open front side. The terminal block cover 36 covers the terminal block 35 and is fitted to the outside of the terminal block 35.

In this embodiment, the terminal block 35 is used, but this is not a limitation. For example, instead of using the terminal block 35, a connecting part such as a connector can be used.

The light source unit 41 is a part that emits light to the side (back side) in the lighting fixture 11. The light source unit 41 is a module board on which a light emitting element that is a light source is mounted. The light source unit 41 is a board 43 processed into a flat plate shape (horizontally elongated shape), and a plurality of LED elements 42 that are point light sources are arranged on the board in a substantially straight line at equal intervals in the longitudinal direction (left-right direction) of the board 43. In this embodiment, a plurality of LED elements are used as the light source, but this is not limited to this, and a COB type light emitting module or an organic EL element may be used. The board 43 is positioned by a pair of board guides 23 of the fixture body 21 (see FIG. 7(a)). As a result, the board 43 is positioned in contact with the flat surface of the bottom 22a on the back side of the fixture body 21. Next, the packing 51 to which the light control member 61 is previously engaged is fitted into the recess 22 of the fixture body 21. As a result, the board pressing portion 53 of the packing 51 abuts on both ends of the board 43 in the left-right direction (see FIG. 7(b)). Next, the top plate 28 is placed on the back side of the packing 51, and the top plate 28 is attached to the top plate attachment portion 24 of the fixture body 21 by the attachment member 30 such as a screw, thereby pressing the packing 51 (see FIG. 8). As a result, the board 43 is fixed to the recess 22 of the fixture body 21. In addition, the board 43 is pressed against the bottom 22a side of the recess 22 of the fixture body 21 by the board pressing portion 53 of the packing 51, so that the degree of adhesion between the board 43 and the fixture body 21 can be increased. Since the light source unit 41 is attached to the fixture body 21 in this way, no attachment member such as a screw for attaching the light source unit 41 is required, and the number of parts can be reduced. The board 43 is electrically connected to the power supply unit 31 by an electric wire extending from a connector 44 provided near one end of the board 43 in the left-right direction.

The light source unit 41 is disposed such that the back surface of the mounting surface of the substrate 43 abuts against the flat surface of the bottom 22a in the recess 22 of the fixture body 21, so that heat generated from the light source unit 41 is transferred to the bottom 22a. When the ambient temperature on the front side of the bottom 22a is lower than the temperature of the bottom 22a, the heat transferred to the bottom 22a is transferred to the surrounding air on the front side of the bottom 22a. In addition, the heat transferred to the bottom 22a is transferred to the entire fixture body 21. As a result, the heat transferred to the bottom 22a is dissipated to the periphery of the bottom 22a. In other words, the fixture body 21 functions as a heat dissipation member that transfers the heat generated from the light source unit 41 and dissipates it to the outside.
The substrate 43 may be attached to the recess 22 (bottom 22a) of the device body 21 via a thermally conductive sheet or thermal grease, thereby achieving higher heat dissipation properties.
In addition, in this embodiment, one module board is used as the light source unit 41, but this is not particularly limited, and the light source unit may be configured with a plurality of module boards.

As shown in FIG. 9, the packing 51 is a flexible elastic member having an outer shape of a horizontally elongated, approximately rectangular frame. The packing 51 in this embodiment is colored black. The packing 51 in this embodiment is made of silicone rubber. The packing 51 is disposed between the light source unit 41 and the top plate 28. The packing 51 has a peripheral wall portion 52, a board holding portion 53, an engagement portion 54, a protruding portion 55, an electric wire holding portion 56, and a locking portion 57 (see FIG. 8). The peripheral wall portion 52 is formed so as to fit along the side wall portion 22b of the device body 21. The peripheral wall portion 52 is an outer frame portion of the approximately square cylindrical packing 51. The board holding portion 53 is a portion extending inward from the left and right portions of the peripheral wall portion 52. The board pressing portion 53 is a portion that overlaps both ends of the light source unit 41 in the left-right direction and abuts on the mounting surface of the board 43 when the packing 51 is attached to the fixture body 21. The engagement portion 54 is a rectangular cylindrical portion that extends in the left-right direction and communicates in the up-down direction. The engagement portion 54 is formed to have a smaller dimension than the outer shape of the upper end of the light control member 61. As a result, when the light control member 61 is engaged with the engagement portion 54, the engagement portion 54 expands, and the engagement portion 54 contracts due to a restoring force that tries to return to its original shape and is arranged so as to follow the periphery of the light control member 61. When the packing 51 is arranged between the fixture body 21 and the top plate 28 with the light control member 61 engaged, the engagement portion 54 of the packing 51 abuts against the fixture body 21, the top plate 28, and the light control member 61, respectively. The packing 51 is held in a desired position by being in close contact with each member due to its frictional force. As a result, the engagement portion 54 can stably hold the light control member 61. The protruding portion 55 is a generally rectangular frame-shaped portion that protrudes outward from the outer periphery of the top plate 28 (see Figs. 2 and 4). The protruding portion 55 has a rib 55a that abuts against the wall surface W when the lighting fixture 11 is attached to the wall surface W. The rib 55a is formed in a rectangular frame shape around the periphery of the peripheral wall portion 52 and protrudes to the back side. The rib 55a is formed in a shape in which two generally triangular shapes are connected in cross section. When the lighting fixture 11 is attached to the wall surface W, the rib 55a abuts against the peripheral portion of the mounting hole of the wall surface W. This makes it possible to close the gap between the peripheral portion of the mounting hole of the wall surface W and the lighting fixture 11, and for example, when used outdoors, it is possible to prevent intrusion of rainwater, etc.

The electric wire holding portion 56 is a portion formed by protruding downward from the right side of the upper portion of the peripheral wall portion 52. The electric wire holding portion 56 has a notch portion 56a and a convex portion 56b having a generally trapezoidal cross section. The notch portion 56a is a portion cut out to open the lower side of the electric wire holding portion 56, and is a portion that holds the electric wire that electrically connects the light source portion 41 and the power source portion 31 by sandwiching it. The convex portion 56b is a portion that engages with the notch hole 28c of the top plate 28. The notch portion 56a of the electric wire holding portion 56 is cut out so that the lower side is open, and the notch hole 28c of the top plate 28 is cut out so that the upper side is open. Therefore, the electric wire is held by being sandwiched between the notch portion 56a of the electric wire holding portion 56 and the notch hole 28c of the top plate 28 from above and below. This prevents the electric wire from falling out of the notch 56a of the electric wire holding portion 56. The locking portion 57 is a flat surface located below the board pressing portion 53, and is a portion that locks the upper ends of both left and right ends of the light control member 61 when the light control member 61 is engaged with the engagement portion 54.

The packing 51 is attached to the fixture body 21 by a mounting member such as a screw against the restoring force of the packing 51, so that a part of the peripheral part of the board 43 of the light source unit 41 (both ends of the board 43 in the left-right direction in this embodiment) is pressed against the bottom part 22a of the fixture body 21 by the board pressing part 53 of the packing 51. At this time, since the packing 51 is attached in a compressed state in the fixture body 21, it is possible to suppress the occurrence of a gap between the engagement part 54 and the light control member 61, and for example, in the case of outdoor use, it is possible to prevent the intrusion of rainwater, etc. The right board pressing part 53 has a different shape from the left board pressing part 53, and is provided with a notch 53a so as not to interfere with the connector 44 of the light source unit 41 when the board 43 of the light source unit 41 is placed in the board guide part 23.
In addition, when pressing a portion of the peripheral portion of the substrate 43 with the substrate pressing portion, the pressed portion may be other than both ends of the substrate 43, and for example, the substrate pressing portion may be configured to press only the corners of the substrate 43.

The light control member 61 is a member that reflects and diffuses the light from the light source unit 41 to control it. The light control member 61 is provided so as to cover the irradiation opening 25. The light control member 61 is a member made of translucent (milky white) resin. The light control member 61 has an incident surface 62, a light guide section 63, an exit surface 64, a wall section 65, and a locking section 66. The incident surface 62 is a plane that extends horizontally in the left-right direction and is formed in a horizontally elongated rectangular shape in a plan view. The light guide section 63 has a concave shape and is a section that guides light from the incident surface 62 to the exit surface 64. Both ends 63a, 63a in the longitudinal direction of the light guide section 63 are arranged near both ends 25a, 25a in the longitudinal direction of the irradiation opening 25 (see FIG. 8). The center of the light guide 63 in the longitudinal direction is disposed closer to the interior of the lighting fixture 11 than both ends 25a of the irradiation opening 25 in the longitudinal direction. The exit surface 64 extends in the left-right direction and is formed as an arch-shaped concave surface in cross section. The direction of the optical axis L of the light source 41 is different from the exit direction of the exit surface 64 of the light control member 61 (arrow E in FIG. 4). As a result, the light in the direction of the optical axis L, which is the strongest light of the light source 41, is not directly emitted from the exit surface 64, and glare can be reduced. In addition, the perpendicular line P of the entrance surface 62 of the light control member 61 intersects with the direction of the optical axis L (see FIG. 4). As a result, the light in the direction of the optical axis L, which is the strongest light of the light source 41, is not incident on the entrance surface 62, and glare can be reduced.

The wall portion 65 is a plate-like portion extending downward from the rear end of the light guide portion 63 in the front-rear direction. The wall portion 65 is formed so as to intersect with the emission surface 64 (see FIG. 10B). The lower end (exit surface side end) of the wall portion 65 is close to the lower end of the irradiation opening 25 in the up-down direction. The lower end of the wall portion 65 is formed so as to be parallel to the lower end of the irradiation opening 25. The wall portion 65 faces the wall surface W when the lighting device 11 is attached to the wall surface W. The side of the wall portion 65 facing the wall surface W is formed as a flat surface. The locking portion 66 is a eaves-like portion extending linearly in the left-right direction at the upper end portions of the front and rear surfaces of the light guide portion 63. The locking portion 66 is a portion that is locked to the upper end of the engagement portion 54 of the packing 51. The light control member 61 is attached so as to cover the engagement portion 54 of the packing 51. Thereby, the light control member 61 can prevent dust and the like from adhering to the LED elements 42. In the light control member 61, the light emitted from the light source unit 41 is reflected in the space S and guided downward, and enters the light guide unit 63 via the entrance surface 62. The light that has passed through the light guide unit 63 exits from the exit surface 64 and is irradiated downward from the irradiation opening 25 of the lighting fixture 11.
The shape of the light control member 61 can be appropriately changed depending on the application. For example, the shape of the emission surface may be a flat surface, a convex surface, a prism shape, or a combination of these.
In addition, a light diffusion treatment such as a texturing process may be applied to the outer surface of the light control member 61. This reduces the graininess of the LED elements 42 and allows a more uniform light emitting surface to be achieved.

The mounting spring 71 is a fixing means for embedding the lighting fixture 11 in a mounting hole in the wall surface W. The mounting spring 71 is disposed in the spring mounting portion 34 of the power supply cover 33. The mounting spring 71 is a leaf spring formed by bending and curving the middle portion of a plate-shaped metal member such as stainless steel at multiple locations. The mounting spring 71 is a leaf spring formed in a substantially V-shape, and the base end abuts against the spring mounting portion 34 of the power supply cover 33 and is fixed by a mounting member such as a screw, and the free end extends to the side of the lighting fixture 11. When the lighting fixture 11 is installed in the mounting hole in the wall surface W with the mounting spring 71 bent, the mounting spring 71 presses the periphery of the mounting hole by the elastic force of the mounting spring 71 trying to expand, thereby clamping the wall surface W between the mounting spring 71 and the top plate 28, and fixing the lighting fixture 11 to the wall surface W.
The shape, mounting position, number, etc. of the mounting springs are not limited to those in the present embodiment. In addition, a method other than the mounting springs may be used to mount the lighting fixture 11 to the mounting surface. For example, a method of mounting the lighting fixture 11 to the mounting surface or mounting frame using a mounting member such as a screw may be used.

In the lighting fixture 11 according to the present embodiment described above, the substrate 43 on which the LED elements 42 of the light source section 41 are mounted is in contact with the rear side of the fixture body 21, which is the front cover. This allows heat generated by the LED elements 42 to be transferred from the substrate 43 to the fixture body 21, and then dissipated from the fixture body 21, for example, into the surrounding air on the front side. This makes it possible to provide a lighting fixture 11 that is small and has high heat dissipation properties.

In addition, in the lighting fixture 11, the power supply unit 31 is arranged so as to face the mounting surface side of the substrate 43 on which the LED elements 42 are mounted. When providing a distance between the light source unit and the power supply unit so as not to affect the power supply unit with heat generated from the light source unit, if the power supply unit is arranged adjacent to the light source unit in the width direction, the lighting fixture will become larger in the width direction. On the other hand, by arranging the power supply unit 31 facing the mounting surface of the substrate 43 as in the lighting fixture 11, a distance can be provided between the substrate 43 on which the LED elements 42 are mounted and the power supply unit 31 without increasing the size of the lighting fixture 11 in the width direction, and the power supply unit 31 is less likely to be affected by heat from the LED elements 42.

The lighting fixture 11 also has a top plate 28 that separates the light source unit 41 and the power supply unit 31, and the fixture body 21 and the top plate 28 form a space S that surrounds the light source unit 41. By providing the top plate 28 between the light source unit 41 and the power supply unit 31 to form the space S in this way, it is possible to prevent the power supply components of the power supply unit 31 from blocking the light and creating shadows. Furthermore, the light emitted from the LED element 42 is reflected and diffused within the space S before being irradiated from the irradiation opening 25 of the lighting fixture 11, so that irradiation light with little unevenness can be obtained.

In addition, in the lighting device 11, the top plate 28 has a reflective surface 28d that reflects the light emitted from the light source unit 41. This allows the light emitted from the LED element 42 of the light source unit 41 to be controlled by the reflective surface 28d of the top plate 28, thereby obtaining the desired irradiation light.

The lighting fixture 11 also has a packing 51, which is an elastic member, between the board 43 on which the LED elements 42 are mounted and the top plate 28, and the top plate 28 is attached to the fixture body 21 with a mounting member such as a screw against the restoring force of the packing 51, so that the board 43 is pressed against the fixture body 21 by the packing 51. This increases the degree of adhesion between the board 43 on which the LED elements 42 are mounted and the fixture body 21, thereby improving heat transfer and increasing heat dissipation from the fixture body 21.

In addition, in the lighting fixture 11, the fixture body 21 has a board guide portion 23 that guides the board 43, on the back side of which the LED elements 42 are mounted, to a predetermined position. This makes it easier to place the board 43 in a predetermined position on the fixture body 21, improving assembly. In addition, for example, if the shape of the board guide portion 23 is configured to be U-shaped so as to follow the shapes of both ends of the board 43 as in this embodiment, it is possible to prevent the board 43 from falling off the fixture body 21.

In addition, in the lighting fixture 11, the packing 51 has a peripheral wall portion 52 that fits along the side wall portion 22b of the fixture body 21, and board holders 53 that extend inward in the left-right direction from the peripheral wall portion 52, and the board holders 53 press a portion of the peripheral portion of the board 43 (both left-right ends of the board 43 in this embodiment) against the fixture body 21. In this way, by pressing a portion of the peripheral portion of the board 43 with the board holders 53, the adhesion of the board 43 to the mounting surface can be improved. In addition, by providing the board holders 53 to press only a portion of the peripheral portion of the board 43, the board holders 53 do not surround the entire peripheral portion of the board 43, and therefore the board holders 53 can prevent the board holders 53 from blocking light and creating these shadows. In the case of the board holders 53, 53 of this embodiment, the board holders are not arranged at the upper and lower ends of the board 43, except for both ends, so the configuration makes it easy to distribute light toward the upper and lower ends of the board 43.

The lighting fixture 11 also has a light control member 61 that controls the light from the light source unit 41, and the packing 51 has an engagement portion 54 that engages the light control member 61. By providing the packing 51 with the engagement portion 54 that engages the light control member 61 in this way, it is possible to easily position the light control member 61 relative to the packing 51 and hold the light control member 61. Therefore, since a separate mounting member for mounting the light control member 61 is not required, the number of parts can be reduced. In addition, since the packing 51 is arranged around the light control member 61, the light control member 61 can be made more airtight with other adjacent members (e.g., the fixture body 21 and the wall surface W) via the packing 51.

In addition, in the lighting fixture 11, the packing 51 has a protruding portion 55 that protrudes outward from the outer periphery of the top plate 28, and the protruding portion 55 abuts the wall surface W, which is the mounting surface of the lighting fixture 11. In this way, by configuring the packing 51 to abut the wall surface W using the protruding portion 55, the airtightness of the lighting fixture 11 can be ensured. Since a separate airtight packing is not required to ensure airtightness between the lighting fixture and the wall surface W, the number of parts can be reduced and assembly can be improved. In addition, since the packing 51 is sandwiched and fixed between the fixture body 21 and the top plate 28, the packing does not fall off or shift position when mounting the lighting fixture to the wall surface W, making it easy to mount the lighting fixture.

In addition, in the lighting fixture 11, the protrusion 55 has a rib 55a that abuts against the wall surface W. By having the rib 55a, it is possible to reliably contact the wall surface W, and further increase the airtightness with the wall surface W.

In addition, in the lighting fixture 11, the packing 51 is formed in black. By making the packing 51 black, it is possible to prevent light leakage to the outside of the lighting fixture 11. In other words, by making the packing 51 black, it is possible to prevent the light emitted from the light source unit 41 from passing through the packing 51. Furthermore, by making the packing 51 black, it is possible to suppress reflection by the packing 51 and reduce the brightness of the light emitted from the lighting fixture 11, thereby obtaining light with reduced glare, for example light suitable for a footlight (footlight).

In addition, in the lighting fixture 11, the light source unit 41 and the power supply unit 31 are electrically connected by an electric wire, and the packing 51 has an electric wire holding portion 56 that holds this electric wire. The electric wire holding portion 56 holds the electric wire in a position away from the light source unit 41 (substrate 43), preventing the electric wire from being displaced or moved within the lighting fixture 11. In addition, by arranging the electric wire holding portion 56 in a position where the wiring distance between the light source unit 41 and the power supply unit 31 is shortened, the length of the electric wire between the light source unit 41 and the power supply unit 31 can be shortened.

The lighting fixture 11 has a light source unit 41, a horizontally elongated irradiation opening 25 that irradiates light from the light source unit 41 to the outside from the lower end of the lighting fixture 11, and a light control member 61 that is provided to cover the irradiation opening 25. The light control member 61 has a flat entrance surface 62 and an exit surface 64 that is formed as a concave surface with an arch-shaped cross section. As a result, the light emitted from the light source unit 41 is reflected and diffused by the light control member 61 and emitted to the outside from the irradiation opening 25 of the lighting fixture 11. Since the exit surface 64 is formed as a concave surface with an arch-shaped cross section, the light can be diffused to both ends in the longitudinal direction of the horizontally elongated irradiation opening 25, thereby realizing uniform light emission with reduced glare.

In addition, in the lighting device 11, both longitudinal ends 63a of the light guide section 63 of the light control member 61 are disposed near both longitudinal ends 25a of the irradiation opening 25. This makes it difficult for light that passes through both longitudinal ends 63a of the light guide section 63 of the light control member 61 to be shaded by the edges of the irradiation opening 25.

In addition, in the lighting fixture 11, the longitudinal center of the light guide section 63 of the light control member 61 is located closer to the interior of the lighting fixture 11 than both longitudinal ends 25a of the irradiation opening 25. This allows the brightest part of the exit surface 64 of the light control member 61 to be located closer to the interior of the lighting fixture 11, thereby reducing glare.

In addition, in the lighting device 11, the direction of the optical axis L of the light source unit 41 is different from the emission direction of the emission surface 64 of the light control member 61 (arrow E in FIG. 4). As a result, light in the direction of the optical axis L, which has the highest brightness, is not emitted directly from the emission surface 64, thereby reducing glare.

In addition, in the lighting device 11, the light control member 61 has at least one wall portion 65 that intersects with the emission surface 64, and the lower end of the wall portion 65 is located close to the lower end of the irradiation opening 25 in the up-down direction. By providing the wall portion 65 in this manner, the rigidity of the light control member 61 can be increased, making it less likely to deform. In addition, by suppressing the effects of unevenness on the wall surface W and the occurrence of twisting of the packing 51, the irradiation opening 25 is not blocked, and uniform light distribution can be maintained.
As described above, lighting fixture 11 can provide a lighting fixture that reduces glare and achieves uniform light emission.

The above describes an embodiment of the present invention with reference to the drawings (Figs. 1 to 10). However, the present invention is not limited to the above embodiment, and can be implemented in various forms without departing from the gist of the present invention. Furthermore, the shapes and the like shown in the above embodiment are merely examples and are not particularly limited, and various modifications are possible without substantially departing from the effects of the present invention.

REFERENCE SIGNS LIST 11 Lighting fixture 21 Fixture body 25 Irradiation opening 31 Power supply unit 41 Light source unit 42 LED element 43 Substrate 61 Light control member 62 Incident surface 64 Exit surface

Claims (5)

The instrument body,
A light source unit disposed in a space formed inside the device body ;
an illumination opening formed in the fixture body and elongated horizontally to illuminate the light from the light source unit to the outside of the lighting fixture;
a light control member provided to close the irradiation opening in a state in which the space is formed ,
The light control member has a flat incident surface and an exit surface formed into a concave surface having an arch-shaped cross section. the light control member is formed such that a central portion of the light exit surface in a longitudinal direction is recessed more than both end portions of the light exit surface,
both ends of the light control member in a longitudinal direction are disposed near both ends of the irradiation opening in a longitudinal direction ;
A central portion of the light control member in a longitudinal direction is disposed on an inner side of the lighting fixture relative to both ends of the irradiation opening in a longitudinal direction.
2. A lighting fixture according to claim 1. The lighting device according to claim 1 , wherein an optical axis direction of the light source unit is different from an emission direction of the emission surface of the light control member . 4. The lighting device according to claim 1, wherein the light control member has at least one wall portion that intersects with the exit surface, and an end portion of the wall portion on the exit surface side is located vertically close to an end portion of the irradiation opening . The lighting device according to claim 1 , wherein the light control member is provided such that the light exit surface faces the light entrance surface .

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