JP7205879B2 - lighting equipment - Google Patents

Description

The present invention relates to lighting fixtures using light-emitting elements such as LEDs as light sources.

2. Description of the Related Art In recent years, lighting fixtures using light emitting elements such as LEDs, which have low power consumption and long life, as light sources have been widely used.

For example, Patent Literature 1 below describes a lighting fixture that includes a main body and a substantially circular substrate having a mounting surface on which a plurality of light emitting elements are mounted on the front side. Further, a translucent lens member is arranged on the front side of the substrate in order to diffuse the light emitted from the light emitting element. The lens member is made of a transparent synthetic resin such as acrylic resin, and is integrally formed in a substantially circular shape along the arrangement of the light emitting elements so as to cover the entire surface of the substrate including the light emitting elements.

Further, Patent Document 2 below describes a point light source, a light reflecting plate arranged around the point light source, a translucent light diffusion surface plate arranged opposite to the light reflecting plate, and a light emitting side. A light box is described which has an opening formed therein and a case in which at least a point light source and a light reflector are housed. The light reflecting plate has a shape in which a plurality of storage recesses having an inverted truncated square pyramid shape are provided, and is integrally formed by pressing a bubble-containing resin sheet having fine bubbles inside. . Further, a point light source such as an LED is arranged in the housing recess of the light reflecting plate.

Japanese Patent No. 5320563 JP 2008-270144 A

However, in the lighting fixture of Patent Document 1, the lens member for diffusing light has a shape that covers the entire surface of the substrate including the light emitting element. Life expectancy is likely to be shortened.

Further, in the light reflector in the light box of Patent Document 2, since the point-like light source is arranged in the storage recess, heat can be released relatively easily. However, since the light reflecting plate is made of a bubble-containing resin sheet, it has the disadvantage of being easily deformed or lifted by heat.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a lighting fixture that can easily dissipate heat from a light-emitting element and can suppress deformation of a reflector.

To achieve the above object, the lighting fixture of the present invention comprises a main body formed of a metal plate, a circuit board installed on the main body, and a plurality of light emitting elements mounted on the circuit board in a predetermined arrangement. and a reflector installed to surround each light emitting element, the circuit board, and the reflector are superimposed and fixed to the main body, and the circuit board is placed between the main body and the fixing means. and a cover member on which the reflector is arranged and which covers the main body and diffuses and transmits the light emitted from the light emitting element, the reflector being made of a resin sheet containing air bubbles, It has a recess formed corresponding to the element, and an opening formed in the bottom of the recess to expose the corresponding light emitting element, and the inner periphery of the recess extends from the peripheral edge of the opening toward the front side. The peripheral edge of each of the recesses forms a frame-like continuous flat surface so as to surround each of the recesses.

According to the above invention, the light emitted from the light emitting element is reflected by the inclined surface of the inner periphery of the reflector, and is efficiently irradiated onto the cover member while spreading forward. In addition, since the reflector is made of a bubble-containing sheet, it has the advantage of being excellent in the ability to scatter and reflect light and being lightweight. On the other hand, a reflector made of a bubble-containing sheet has the problem of being easily deformed and lifted by heat. can. Furthermore, when a light-emitting element such as an LED is exposed to high temperatures due to heat generation, there is a problem that the light-emitting efficiency is reduced and the life is shortened. is easily dissipated to the outside. In addition, since the circuit board on which the light emitting element is mounted is placed on the main body formed of the metal plate, the heat of the circuit board is easily dissipated to the outside through the main body. As a result, it is possible to suppress a decrease in the luminous efficiency of a light emitting element such as an LED and extend the life of the element. Furthermore, since the reflecting plate made of the resin sheet is placed on the circuit board and the reflecting plate is covered with the cover member, it is possible to reduce the thickness and weight of the lighting fixture as a whole.

In the lighting fixture of the present invention, it is preferable that the fixing means is composed of a screw that passes through the reflecting plate and the circuit board and is screwed into a screw hole provided in the main body. According to the above aspect, even if the reflector is made of a foam-containing resin sheet with relatively low rigidity, the reflector and the circuit board can be firmly fixed to the main body. In addition, the circuit board and the main body are brought into close contact with each other, so that the heat of the circuit board can be more easily dissipated to the outside through the main body.

In the luminaire of the present invention, it is preferable that the portion of the reflector fastened by the screw is recessed toward the circuit board and is in contact with the surface of the circuit board. According to the above aspect, the portion of the reflector fastened with the screw is recessed toward the circuit board and abuts against the front surface of the circuit board, so that the reflector can be fixed to the circuit board without rattling. In addition, it is possible to prevent the head of the screw from protruding from the front surface of the reflector, thereby making it possible to reduce the thickness of the lighting device.

In the luminaire of the present invention, a pressing sheet having a shape that fits the flat surface of the reflector is arranged on the reflector, and the holding sheet has an opening corresponding to the concave portion of the reflector. It is preferable that the fixing means superimpose the circuit board, the reflector, and the pressing sheet and fix them to the main body. According to the above aspect, since the flat surface of the reflector is pressed by the pressing sheet, deformation of the reflector can be suppressed and the shape can be more stably maintained.

In the lighting fixture of the present invention, the fixing means is composed of a screw that passes through the pressing sheet, the reflector, and the circuit board and is screwed into a screw hole provided in the main body. is preferred. According to the above-described aspect, the pressing sheet, the reflector, and the circuit board can be fastened together and fixed to the main body by the screws. The close contact allows the heat of the circuit board to be more easily dissipated to the outside through the main body.

In the lighting fixture of the present invention, it is preferable that the pressing sheet is made of a transparent resin sheet. According to the above aspect, when part of the light emitted from the light emitting element does not pass through the cover member and is reflected by the inner surface of the cover member and returns to the reflector side, the pressing sheet covers the flat portion of the reflector plate. is made of a transparent resin sheet, the light can be transmitted through the resin sheet, reflected again by the reflector, and returned to the cover member side, so that the illumination effect can be enhanced.

In the lighting fixture of the present invention, the light-emitting element is square or rectangular, the opening of the reflector has a shape that matches the shape of the light-emitting element, and It is preferable that the adjacent portion has a pyramidal shape with a ridgeline, and the portion adjacent to the flat surface has a gently curved surface shape in which the ridgeline disappears and the inclination angle with respect to the flat surface becomes gentle. According to the above aspect, the rigidity is imparted by the pyramid-shaped portion having the ridgeline close to the opening, and the ridgeline disappears and the inclination angle with respect to the flat surface becomes gentle, so that the portion has a gentle curved surface shape. , the light emitted from the light emitting element can be reflected and spread forward to efficiently irradiate the cover member.

In the lighting fixture of the present invention, it is preferable that a pair of light-emitting elements having different emission colors are arranged side by side so as to be exposed from the respective openings of the reflector. According to the above aspect, the number of openings in the reflector can be reduced compared to the case where light-emitting elements with different emission colors are arranged in separate openings. , the securing means can be arranged on the widened portion thereof. Therefore, even if the reflecting plate is dented by the fixing means, the shape of the recess having the opening can be prevented from being affected.

According to the present invention, since the reflector is held down by the fixing means, deformation of the reflector is suppressed and a stable shape can be maintained. Heat is easily dissipated to the outside, and since the circuit board on which the light emitting element is mounted is placed on the main body formed of the metal plate, the heat of the circuit board is also easily dissipated to the outside through the main body. As a result, it is possible to suppress a decrease in the luminous efficiency of the light emitting element and extend the life of the light emitting element.

1 shows an embodiment of a luminaire according to the invention and is a perspective view thereof; FIG. It is an exploded perspective view of the same lighting fixture. It is a principal part exploded perspective view of the same lighting fixture. FIG. 3 is a perspective view of the same lighting fixture with a cover member removed. In the same lighting fixture, it is an expansion perspective view which shows the attachment member with a ceiling part. It is an expansion perspective view which shows the reflector which comprises the same lighting fixture. It is a principal part expansion perspective view of the same lighting fixture. It is a principal part expanded sectional view of the same lighting fixture. Fig. 10 shows another embodiment of the lighting fixture according to the present invention, and is an exploded perspective view of the essential parts thereof; It is a principal part expansion perspective view of the same lighting fixture. It is a principal part expanded sectional view of the same lighting fixture.

An embodiment of a lighting fixture according to the present invention will be described below with reference to the drawings.

As shown in FIG. 2, the lighting fixture 10 in this embodiment has a main body 20 made of an annular metal plate. In the following description, the side of the lighting fixture 10 attached to the ceiling (not shown) will be referred to as the rear surface (also referred to as the back surface), and the opposite side, that is, the surface facing the interior will be described as the front surface (also referred to as the front surface). .

As shown in FIG. 2, the outer peripheral edge of the main body 20 is curved toward the front side, and locking members 21 are attached to the bottom surface on the inner peripheral side at a plurality of locations in the circumferential direction. Further, as shown in FIG. 5, the inner peripheral edge of the main body 20 is curved toward the front side, and the inner periphery of the opening forms a mounting portion 22 with which the adapter 30 is engaged. Furthermore, as shown in FIG. 8, a plurality of screw holes 23 are formed at predetermined locations of the main body 20 for screwing the screws 67 .

Further, as shown in FIGS. 3 and 5, a lighting device cover 24 having a double cylindrical shape with a closed front side is arranged on the outer periphery of the mounting portion 22 of the main body 20 . In particular, as shown in FIG. 5, the lighting device cover 24 accommodates the lighting device 25 including circuit parts necessary for lighting (light emission) of the light emitting element 45 (see FIGS. 3 and 8). Furthermore, the lighting device 25 is connected to a night light 26 and lamps 27 and 28 for checking the lighting state. A plurality of engagement grooves 24a are formed in the front surface of the lighting device cover 24. As shown in FIG.

As shown in FIG. 5, the adapter 30 is connected in a known manner to a hanging ceiling body 33, which is a wiring device attached to the ceiling (not shown). Engagement claws 31 having tapered surfaces 31a protrude from two opposing locations on the outer periphery of the adapter 30, and each engagement claw 31 is biased in the projecting direction. Then, when the adapter 30 is inserted into the mounting portion 22 from the rear side, the engaging claw 31 is pulled in through the tapered surface 31a and then engaged with the mounting portion 22 (see FIG. 3). and FIG. 4). The adapter 30 is provided with a release button 35 for releasing the engagement by retracting the engaging claws 31 when the lighting fixture 10 is removed from the hanging ceiling body 33 (see FIG. 5). 5, the adapter 30 is connected to the lighting device 25 via a connector 37a provided at the tip of a cord 37. As shown in FIG.

As shown in FIGS. 3 and 8, a circuit board 40 is installed on the main body 20. As shown in FIG. The circuit board 40 of this embodiment is composed of four fan-shaped ones. These four circuit boards 40 are connected in the circumferential direction so as to form a ring surrounding the periphery of the lighting device cover 24 and be installed on the front side of the main body 20 . A connector 41 is provided on each of the four circuit boards 40 (see FIG. 3). The connectors 41, 41 of the circuit boards 40, 40 adjacent in the circumferential direction are connected to each other through terminals (not shown), so that the four circuit boards 40 are electrically and integrally connected. It has become.

A plurality of light emitting elements 45 are mounted on the circuit board 40 in a predetermined arrangement. In the case of this embodiment, as shown in FIG. 3, a plurality of light emitting elements 45 are arranged concentrically on the circuit board 40 in seven rows in the radial direction. are arranged at approximately equal intervals. Each light emitting element 45 has a rectangular shape. Further, the light emitting elements 45 arranged in a predetermined row in the radial direction of the circuit board 40 and the light emitting elements 45 arranged in an adjacent row in the radial direction are staggered.

Furthermore, the light-emitting elements 45 in this embodiment are composed of two types of LEDs emitting different colors, and the different emitting colors are alternately arranged in the circumferential direction of the circuit board 40 . Further, as shown in FIGS. 3 and 8 , each circuit board 40 is formed with a plurality of screw through holes 43 at positions corresponding to the screw holes 23 formed in the main body 20 . Note that the light emitting elements 45 may have, for example, a square shape, and the arrangement of the plurality of light emitting elements 45 is not limited to the above aspect.

Furthermore, the lighting device 10 is configured such that a reflector 50 is installed so as to surround each light emitting element 45 . The reflecting plate 50 is made of, for example, a bubble-containing resin sheet in which fine bubbles having a predetermined bubble diameter or less are contained in a thermoplastic resin such as polyester. The average bubble diameter of the bubbles contained inside the reflecting plate 50 is preferably 50 μm or less.

Further, as shown in FIG. 3, the reflector 50 of this embodiment is composed of four sector-shaped ones so as to fit the circuit board 40, and each reflector 50 is a rectangle. It has a plurality of rectangular recesses 51 corresponding to the shaped light emitting elements 45 .

As shown in FIGS. 3 and 6, in this embodiment, in correspondence with the plurality of light emitting elements 45 mounted on the circuit board 40, the light emitting elements 45 are concentrically arranged on the reflector 50 in seven rows in the radial direction. , a plurality of recesses 51 are formed, and the recesses 51 in the same row arranged in the circumferential direction are arranged at approximately equal intervals. Further, the concave portions 51 arranged in a predetermined row in the radial direction of the reflecting plate 50 and the concave portions 51 arranged in an adjacent row in the radial direction are shifted in a staggered manner. 3 and 8, each reflector 50 has a plurality of screw through holes at positions corresponding to the plurality of screw holes 23 of the main body 20 and the plurality of screw through holes 43 of the circuit board 40. 58 are formed.

Further, as shown in FIG. 6, an opening 53 is formed at the bottom of each recess 51 to expose the corresponding light emitting element 45 . The opening 53 in this embodiment is rectangular in shape to accommodate the rectangular light emitting element 45 .

Furthermore, the inner periphery of each recess 51 forms an inclined surface 55 that gradually expands from the periphery of each side of the rectangular opening 53 toward the front side. In this embodiment, the inner peripheral portions extending from the four sides of the opening 53 form inclined surfaces 55, respectively, and the inner periphery of the recess 51 has a concave shape like a quadrangular pyramid with the head cut off as a whole. (See FIGS. 6 and 8). In addition, as shown in FIG. 6, the peripheral edge of each recess 51 (the peripheral edge on the front side away from the bottom) is surrounded by a square frame-shaped portion having a flat front surface. Circumferentially and radially adjacent frame-like portions are connected to each other to form a continuous flat surface 57 in a frame-like shape so as to surround each concave portion 51 .

Furthermore, as shown in FIG. 6, the portion of the inner periphery of each recess 51 near the opening 53 has a pyramidal shape with a ridge line R, and the portion near the flat surface 57 has no ridge line. It has a gently curved shape with a gentler inclination angle with respect to the flat surface 57 . Further, as shown in FIG. 3, a connector insertion hole 59 is formed in the reflecting plate 50 at a position corresponding to the connector 41 of the circuit board 40 so that the connector 41 is exposed on the front side. (See FIG. 7). When the light emitting element 45 is square, the opening 53 of the reflector 50 is also square accordingly.

Further, as shown in FIGS. 3, 7 and 8, the lighting fixture 10 has a pressing sheet 60 which is arranged on the reflecting plate 50 and presses the reflecting plate 50 down.

The pressing sheet 60 of this embodiment is made of, for example, a transparent resin sheet made of polycarbonate, epoxy resin, or the like. composed of things.

As shown in FIGS. 3 and 7, each pressing sheet 60 is provided with a plurality of rectangular openings 61 so that portions corresponding to the recessed portions 51 of the reflector 50 are opened. In this embodiment, a plurality of openings 61 are formed on the holding sheet 60 so as to correspond to the plurality of concave portions 51 provided on the reflector 50, and are concentrically arranged in seven rows in the radial direction. The openings 61 in the same row arranged in the circumferential direction are arranged at approximately equal intervals. Further, the openings 61 arranged in a predetermined row in the radial direction of the pressing sheet 60 and the openings 61 arranged in an adjacent row in the radial direction are staggered.

Further, the portion of each pressing sheet 60 other than the opening 61 is fitted to the flat surface 57 of the reflector 50 to form a pressing plate portion 63 having a substantially lattice shape. As shown in FIG. 8, the pressing plate portion 63 is arranged on the front side of the flat surface 57 of the reflector 50 and is capable of coming into contact with the flat surface 57, so that the reflector 50 is deformed by heat. It is a part that suppresses the floating when it is pressed. Each reflector 50 has a plurality of screws at positions corresponding to the plurality of screw holes 23 of the main body 20 , the plurality of screw through holes 43 of the circuit board 40 , and the plurality of screw through holes 58 of the reflector 50 . A through hole 65 is formed. Furthermore, as shown in FIG. 3, a plurality of holding plate portions 63 are broken at positions of the holding sheet 60 corresponding to the connector 41 of the circuit board 40 and the connector insertion holes 59 of the reflector 50 to form broken portions 64. The connector 41 is exposed on the front side (see FIG. 7).

The circuit board 40, the reflector 50, and the pressing sheet 60 are fixed to the main body 20 as follows.

That is, as shown in FIG. 8, the circuit board 40 is arranged on the front side of the main body 20, the reflector 50 is arranged on the front side of the circuit board 40, and the pressing sheet 60 is arranged on the front side of the reflector 50. Then, the screws 67 are inserted into the screw through holes 65 of the holding sheet 60, the screw through holes 58 of the reflector plate 50, and the screw through holes 43 of the circuit board 40, respectively, to tighten the screws of the main body 20. It is screwed into hole 23 . As a result, the main body 20, the circuit board 40, the reflector 50, and the pressing sheet 60 are fastened together and fixed in a state of being in close contact with each other.

That is, in this embodiment, as described above, the "screw 67" passes through the pressing sheet 60, the reflector 50, and the circuit board 40 and is screwed into the screw hole 23 provided in the main body 20. ' constitutes the 'fixing means' in the present invention for superimposing the circuit board 40 , the reflector 50 , and the pressing sheet 60 and fixing them to the main body 20 . The fixing means is not limited to screws, and adhesives, double-sided adhesive tapes, etc. can also be used.

In addition, the lighting fixture 10 has a circuit board 40, a reflector 50, and a pressing sheet 60 arranged between it and the main body 20, and covers the main body 20 to diffuse the light emitted from the light emitting element 45. A transparent cover member 70 is provided.

Like the main body 20, the cover member 70 in this embodiment has an annular shape as a whole, and is formed of a translucent resin plate having milky-white diffusivity. In addition, as shown in FIG. 1, the outer peripheral edge of the cover member 70 has a shape curved toward the back side, and the inner periphery of the outer peripheral edge has a plurality of points provided on the main body 20 in the circumferential direction. A plurality of locking projections 71 are formed to engage with the plurality of locking members 21 . Therefore, when the cover member 70 is placed over the main body 20 and rotated, the plurality of locking projections 71 of the cover member 70 engage with the plurality of locking members 21 of the main body 20, respectively, and the main body 20 is covered with the cover. A member 70 is adapted to be mounted.

Further, as shown in FIG. 1 , a circle formed of a metal plate is provided at the inner peripheral opening of the cover member 70 so as to sandwich the inner peripheral edge of the cover member 70 between the front surface of the lighting device cover 24 and the front surface of the lighting device cover 24 . A plate-like decorative cover 75 is attached. As shown in FIG. 2, the decorative cover 75 has three engaging claws 76 on its back side peripheral edge, and these engaging claws 76 engage the plurality of engaging grooves 24a of the lighting device cover 24. By engaging with each other, the inner peripheral opening of the cover member 70 is mounted. Further, the decorative cover 75 is formed with holes 77, 78, 79 for exposing the night light 26 provided on the main body 20 side and the lamps 27, 28 for checking the lighting state.

Next, the effects of the lighting fixture 10 having the above configuration will be described.

That is, in this luminaire 10, the reflector 50 is installed so as to surround the plurality of light emitting elements 45 mounted on the circuit board 40. The reflector 50 is provided at the bottom of the concave portion 51 to emit light. The inner circumference of the opening 53 that exposes the element 45 forms an inclined surface 55 extending from the peripheral edge of the opening 53 toward the front side. Therefore, when the lighting fixture 10 is turned on via a remote control (not shown) or the like, the lighting device 25 causes the light emitting element 45 on the circuit board 40 to emit light, and the light emitting element 45 emits light as shown in FIG. The light L is reflected by the inclined surface 55 on the inner circumference of the recessed portion 51 of the reflector 50, spreads forward, and can efficiently irradiate the cover member 70, thereby brightly illuminating the room.

Moreover, since the reflecting plate 50 is made of a bubble-containing sheet, it has the advantage of being excellent in the ability to scatter and reflect light and being lightweight. In addition, there is a problem that the reflecting plate 50 made of the bubble-containing sheet is easily deformed and lifted by heat. However, in this luminaire 10, the circuit board 40, the reflector 50, and the pressing sheet 60 are superimposed and fastened to the main body 20 by the screws 67 forming the fixing means, as shown in FIG. As described above, the pressing plate portion 63 of the pressing sheet 60 is pressed in close contact with the front surface of the flat surface 57 of the reflecting plate 50, so that deformation of the reflecting plate 50 is suppressed and a stable shape can be maintained.

Furthermore, when the light-emitting element 45 such as an LED is exposed to high temperatures due to heat generation, there is a problem that the light-emitting efficiency is lowered and the life is shortened. However, in this lighting device 10, as shown in FIGS. 7 and 8, the light emitting elements 45 are exposed through the plurality of openings 53 of the reflector 50, so the heat of the light emitting elements 45 is radiated to the outside. easier. In addition, since the circuit board 40 on which the light emitting element 45 is mounted is placed on the main body 20 formed of a metal plate (see FIG. 8), the heat of the circuit board 40 is also dissipated to the outside through the main body 20. easier to be As a result, it is possible to suppress the deterioration of the luminous efficiency of the light emitting element 45 such as an LED and extend the life of the light emitting element 45 .

Furthermore, the lighting fixture 10 has a shape in which a reflector 50 made of a resin sheet and a pressing sheet 60 for pressing the reflector 50 are placed on the circuit board 40, and the top is covered with a cover member 70. Therefore, it is possible to reduce the thickness and weight of the lighting device 10 as a whole.

Furthermore, in the lighting fixture 10 of this embodiment, as shown in FIG. 8, the circuit board 40, the reflector 50, and the pressing sheet 60 are superimposed and fixed to the main body 20 by the pressing sheet 60, Screws 67 pass through the reflecting plate 50 and the circuit board 40 and are screwed into the screw holes 23 provided in the main body 20 . Therefore, the pressing sheet 60, the reflecting plate 50, and the circuit board 40 can be fastened together by the screws 67, and fixed to the main body 20, so that workability can be improved, and the circuit board 40 can be fixed. and the main body 20 are brought into close contact with each other, the heat of the circuit board 40 can be more easily dissipated to the outside through the main body 20.例文帳に追加

Further, in the lighting fixture 10 of this embodiment, the light emitting element 45 has a rectangular shape, and the opening 53 of the reflector 50 has a shape that matches the shape of the light emitting element 45. The portion close to the opening 53 has a pyramidal shape with a ridgeline R, and the portion close to the flat surface 57 has a gently curved surface shape with the ridgeline disappearing and the inclination angle with respect to the flat surface 57 becoming gentle. (See Figure 8). Therefore, the light emitted from the light emitting element 45 can gradually change the angle of the light reflected by the inner periphery of the reflector 50, and the reflected light can be spread more effectively and radiated forward. The light L emitted through the member 70 can be made more uniform. Even if the light emitting element 45 is square and the opening 53 is also square, the same effect can be obtained.

Further, in the lighting fixture 10 of this embodiment, the pressing sheet 60 is made of a transparent resin sheet. Therefore, when part of the light L emitted from the light emitting element 45 does not pass through the cover member 70 but is reflected by the inner surface of the cover member 70 and returns to the reflector 50 side, the resin of the pressing sheet 60 The light can be transmitted through the sheet, reflected again by the reflector 50 (see arrow L1 in FIG. 8), and returned to the cover member 70 side, so that the illumination effect can be enhanced.

9 to 11 show other embodiments of luminaires according to the invention. In addition, the same code|symbol is attached|subjected to the substantially same part as the said embodiment, and the description is abbreviate|omitted.

A lighting fixture 10A in this embodiment has a configuration that does not include a pressing sheet as compared with the above-described embodiment. That is, as shown in FIG. 9, in this lighting fixture 10A, a reflector 50A is arranged on the front side (surface side) of a circuit board 40A on which light emitting elements 46 and 47 are mounted. , and screws 67, which are directly tightened and fixed to the circuit board 40A.

As shown in FIG. 9, on the front side of the circuit board 40A, a pair of light emitting elements 46 and 47 having different emission colors are arranged in the circumferential direction and in plural rows in the radial direction. Further, as shown in FIG. 10, the pair of light emitting elements 46 and 47 are arranged side by side along the radial direction of the circuit board 40A.

On the other hand, the reflector 50A is composed of four fan-shaped plates as in the above-described embodiment. A plurality of rectangular openings 53 for exposing the light emitting elements 46 and 47 are formed in each of the reflectors 50A. Each opening 53 is arranged such that its longitudinal direction extends along the radial direction of the reflecting plate 50A. The openings 53 are arranged at predetermined intervals along the circumferential direction of the reflector 50A and radially so as to form an arrangement pattern matching the arrangement pattern of the pair of light emitting elements 46 and 47 mounted on the circuit board 40A. It is formed in multiple rows along the direction. Therefore, as shown in FIG. 10, the reflecting plate 50A is superimposed on the front surface of the circuit board 40A with the openings 53 aligned with the pair of light emitting elements 46 and 47. A pair of light-emitting elements 46 and 47 are exposed from each opening 53 when placed on the substrate.

Further, as shown in FIGS. 10 and 11, a plurality of screw placement recesses 54 recessed toward the circuit board 40A are formed at predetermined locations on the flat surface 57 of the reflector 50A. As shown in FIG. 11, a screw locking hole 54a is formed in the bottom of the screw arrangement recess 54. As shown in FIG.

Then, as shown in FIG. 11, with the openings 53 aligned with the pair of light emitting elements 46 and 47, the reflector 50A is superimposed on the front surface of the circuit board 40A. The light emitting elements 46 and 47 of the circuit board 40 are exposed, and the back surface of the screw placement recess 54 of the circuit board 40 is placed in contact with the front surface of the circuit board 40A. In this state, the screw 67 is placed in the screw placement recess 54, and the shaft portion 67a of the screw 67 is inserted through the screw locking hole 54a of the reflector 50A and the screw through hole 43 of the circuit board 40A. By screwing it into the hole 23, the head 67b of the screw 67 is locked to the front side peripheral edge of the screw locking hole 54a, and the reflector 50A is tightened and fixed to the circuit board 40A. .

That is, in this embodiment, the "screws 67" serve as "fixing means" in the present invention for fixing the circuit board 40A and the reflector 50A to the main body 20 by overlapping them. Further, in this embodiment, the above-mentioned "screw arrangement recess 54" constitutes "a portion of the reflector plate which is tightened with a screw" in the present invention.

A connector insertion hole 59 is formed in the reflecting plate 50A at a position corresponding to the connector 41 provided on the circuit board 40A. , the connector 41 is exposed on the front side (see FIGS. 10 and 11). As a result, the connectors 41 can be connected to each other on the front side of the reflector 50, so that assembly workability can be improved.

In the lighting fixture 10A of this embodiment, as described above, the reflector 50A can be directly fastened and fixed to the circuit board 40A via the screws 67 serving as fixing means. Therefore, even if the reflecting plate 50A is made of a bubble-containing resin sheet with relatively low rigidity, the reflecting plate 50A and the circuit board 40A can be firmly fixed to the main body 20 (see FIG. 11).

Further, as shown in FIG. 11, a screw placement recess 54, which is a recessed portion of the reflector 50A toward the circuit board 40A, is in contact with the front surface of the circuit board 40A and is tightened with a screw 67. The plate 50A can be firmly fixed to the circuit board 40A without looseness. Moreover, it is possible to prevent the heads of the screws 67 from protruding from the front surface of the reflector 50A, thereby making it possible to reduce the thickness of the lighting device.

10 and 11, the light-emitting elements 46 and 47 of the lighting device 10A are arranged in a pair and exposed from the openings 53 of the reflector 50A. are placed. Therefore, the number of openings 53 in the reflector 50A can be reduced to widen the interval between the openings 53, and the widened portion can be used to facilitate the placement of fixing means (here, screws 67). can be done. Further, even if the reflecting plate 50A is dented by the fixing means, the shape of the recess having the opening 53 (here, the screw arrangement recess 54) can be prevented from being affected.

The present invention is not limited to the above-described embodiments, and various modified embodiments are possible within the scope of the present invention, and such embodiments are also included in the scope of the present invention. .

10, 10A Lighting device 20 Main body 21 Locking member 22 Mounting portion 23 Screw hole 24 Lighting device cover 24a Engagement groove 25 Lighting device 26 Night light 27, 28 Lamp 30 Adapter 31 Engagement claw 31a Tapered surface 33 Hanging ceiling body 35 Release button 37 cord 37a connector 40, 40A circuit board 41 connector 42 cable 43 screw through hole 45, 46, 47 light emitting element 50, 50A reflector 51 recess 53 opening 54 screw placement recess 54a screw locking hole 55 inclined surface 57 flat surface 58 screw through hole 59 connector insertion hole 60 pressing sheet 61 opening 63 pressing plate portion 64 broken portion 65 screw through hole 67 screw 67 a shaft portion 67 b head 70 cover member 71 locking convex portion 75 decorative cover 76 engaging claws 77 and 78 , 79 hole R edge

Claims (8)

a main body formed of a metal plate;
a circuit board installed on the body;
a plurality of light emitting elements mounted in a predetermined array on the circuit board;
a reflector installed to surround each of the light emitting elements;
a fixing means for superimposing the circuit board and the reflecting plate and fixing them to the main body;
A cover member that disposes the circuit board and the reflector between the body and the body, covers the body, and diffuses and transmits the light emitted from the light emitting element,
The reflecting plate is made of a bubble-containing resin sheet, and has recesses formed corresponding to the light emitting elements, and openings formed at the bottom of the recesses for exposing the corresponding light emitting elements. has an inclined surface that widens from the peripheral edge of the opening toward the front side, and the peripheral edge of each recess forms a frame-like continuous flat surface that surrounds each recess. A lighting device characterized by: 2. The luminaire according to claim 1, wherein said fixing means comprises a screw that passes through said reflector and said circuit board and is screwed into a screw hole provided in said main body. 3. The lighting fixture according to claim 2, wherein the portion of the reflector plate fastened with the screw is recessed toward the circuit board and abuts on the front surface of the circuit board. A pressing sheet having an opening corresponding to the concave portion of the reflecting plate and having a shape conforming to the flat surface of the reflecting plate is disposed on the reflecting plate,
2. The luminaire according to claim 1, wherein said fixing means overlaps said circuit board, said reflector and said pressing sheet and fixes them to said main body. 5. The lighting fixture according to claim 4, wherein said fixing means is constituted by a screw passing through said pressing sheet, said reflecting plate and said circuit board and screwed into a screw hole provided in said main body. 6. The lighting fixture according to claim 4, wherein said pressing sheet is made of a transparent resin sheet. The light emitting element is square or rectangular, the opening of the reflector has a shape that matches the shape of the light emitting element, and the inner periphery of the recess has a ridge line near the opening. 7. The pyramidal shape according to any one of claims 1 to 6, wherein the portion adjacent to the flat surface has a gently curved surface shape in which the ridgeline disappears and the inclination angle with respect to the flat surface becomes gentle. lighting fixtures. The lighting fixture according to any one of claims 1 to 7, wherein a pair of said light emitting elements emitting light of different colors are arranged side by side so as to be exposed from said respective openings of said reflector.

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