JP2020113380A - Light source unit and luminaire including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source unit capable of improving installation workability and a lighting fixture provided with the light source unit. A light source unit is arranged so as to overlap a plate-shaped light emitting board having a plurality of light emitting elements mounted on one plate surface, a heat sink having a board mounting surface on which the light emitting board is mounted, and a light emitting board. A substrate pressing member for fixing a light emitting board to a substrate mounting surface is provided, and the substrate pressing member is provided on a tubular tubular portion surrounding a plurality of light emitting elements and an outer peripheral surface of the tubular portion, and is fixed to the substrate mounting surface. The light emitting substrate is provided with a leg portion having a leg fixing portion to be formed, and the light emitting substrate has a region outside the portion facing the cylinder portion of the substrate pressing member and not facing the substrate pressing member in a state of being fixed to the substrate mounting surface. Have. [Selection diagram] FIG. 9

Description

The present invention relates to a light source unit having a light emitting substrate and a substrate pressing member, and a lighting fixture including the light source unit.

BACKGROUND ART Conventionally, there is a lighting fixture including a light source unit in which a light emitting substrate on which a plurality of light emitting elements are mounted is fixed to a heat sink by a substrate pressing member (for example, refer to Patent Document 1).

The light source unit of the luminaire described in Patent Document 1 has a plate-shaped light emitting substrate on which a plurality of light emitting elements are mounted, and a holding portion having an opening in the center. The light emitting substrate is fixed to the heat sink in a state where the edge portion outside the light emitting element is pressed against the substrate mounting surface of the heat sink at the edge of the opening of the holding portion.

JP, 2010-107000, A

However, in the light source unit of the luminaire described in Patent Document 1, the edge portion of the light emitting substrate and the substrate mounting surface of the heat sink to which the light emitting substrate is attached are covered with the holding portion, and the light emitting element of the light emitting substrate is less than the light emitting element. The outer edge is hidden. Therefore, when the light emitting substrate is attached to the heat sink by the pressing portion, it is not possible to attach the light emitting substrate while checking the components and protrusions around the substrate. As a result, the light emitting board may be attached at a position deviated from a predetermined fixed position, or the light emitting board may interfere with components and protrusions around the board, resulting in poor mounting workability. was there.

The present invention has been made to solve the above problems, and provides a light source unit capable of improving mounting workability and a lighting fixture including the light source unit.

A light source unit according to the present invention includes a plate-shaped light emitting substrate having a plurality of light emitting elements mounted on one plate surface, a heat sink having a substrate mounting surface to which the light emitting substrate is mounted, and a light emitting substrate overlapping the light emitting substrate. And a substrate pressing member for fixing the light emitting substrate to the substrate mounting surface, wherein the substrate pressing member is provided on a cylindrical portion surrounding the plurality of light emitting elements, and an outer peripheral surface of the cylindrical portion. And a leg portion having a leg fixing portion fixed to the substrate mounting surface, wherein the light emitting substrate is a portion facing the tubular portion of the substrate pressing member in a state of being fixed to the substrate mounting surface. A region that does not face the substrate pressing member is provided on the outer side.

According to the light source unit of the present invention, the light emitting substrate has the region that does not face the substrate holding member outside the portion of the light emitting substrate fixed to the substrate mounting surface that faces the tubular portion of the substrate holding member. Therefore, a portion exposed to the outside of the light emitting board can be confirmed, and the work can be performed while confirming that the substrate pressing member is arranged at a predetermined fixed position of the light emitting board, which can improve the mounting workability. it can.

It is a perspective view showing a lighting fixture concerning an embodiment of the invention. It is an exploded perspective view showing a lighting fixture concerning an embodiment of the invention. It is an exploded perspective view showing a light source unit concerning an embodiment of the invention. It is a perspective view which shows the light emitting substrate which concerns on embodiment of this invention. It is a perspective view showing a substrate pressing member concerning an embodiment of the invention. It is a 1st figure explaining the method of attaching the light emitting substrate which concerns on embodiment of this invention to a heat sink. It is a 2nd figure explaining the method of attaching the light emitting substrate which concerns on embodiment of this invention to a heat sink. It is a 3rd figure explaining the method of attaching the light emitting substrate which concerns on embodiment of this invention to a heat sink. It is a 4th figure explaining the method of attaching the light emitting substrate which concerns on embodiment of this invention to a heat sink. FIG. 6 is a plan view of the heat sink according to the embodiment of the present invention before mounting the substrate pressing member. FIG. 5 is a plan view of the heat sink according to the embodiment of the present invention after the substrate pressing member is attached.

Embodiments of the present invention will be described below with reference to the drawings. The present invention is not limited to the embodiments described below. Also, in the following drawings, the size relationship of each component may be different from the actual one.

Embodiment.
FIG. 1 is a perspective view showing a lighting fixture 1 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing the lighting fixture 1 according to the embodiment of the present invention.

First, the overall configuration of the lighting fixture 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. The lighting fixture 1 is a downlight that is inserted into an embedded hole (not shown) formed in, for example, a ceiling. The lighting fixture 1 includes a reflector 100, a power supply unit 200, and a light source unit 300.

The reflector 100 is provided on the emission side of the light source unit 300, reflects the emitted light, and is attached to an opening provided in a mounted portion (not shown) such as a ceiling. The reflector 100 has a reflector body 110 and a spring 120.

The reflector main body 110 has a reflection portion 111, a reflector collar portion 112, and a side wall portion 113. The reflection part 111 has a conical shape with open upper and lower ends, and controls the light emitted from the light source unit 300 in a predetermined direction. The reflector collar portion 112 is provided in the opening of the reflecting portion 111 on the side opposite to the light source unit 300, and the surface on the light source unit 300 side contacts the attached portion. The side wall portion 113 is provided on the outer periphery of the reflection portion 111, and faces the edge of the opening of the attached portion to suppress the horizontal deviation of the lighting fixture 1. The side wall 113 is fitted with the spring 120 and fits into the light source unit 300. The spring 120 is formed of a plate-shaped elastic material, and fixes the lighting fixture 1 to the mounted portion. The spring 120 has an elastic force that presses the attached portion so as to hold the attached portion together with the reflector collar portion 112.

The power supply unit 200 supplies the electric power supplied from the commercial power supply to the light source unit 300 to turn on the light source unit 300. The power supply unit 200 has a power supply main body 210 and a terminal block 220. The power supply main body 210 has a box shape, the light source unit 300 is provided on one end side, and the terminal block 220 is provided on the other end side. In addition, the power supply unit 200 controls the light emitting state of the light source unit 300 by controlling the electric power output from the lighting unit (not shown) that internally lights the light source unit 300, that is, the light source unit 300 emits light. And a control unit (not shown) for dimming and adjusting the light. The terminal block 220 has a first terminal block 220A to which an electric wire from a commercial power source is connected and a second terminal block 220B into which a signal line from the outside is inserted.

In addition, the power supply main body 210 may house a wireless unit that receives a wireless signal from the outside and sends the signal to the lighting unit.

FIG. 3 is an exploded perspective view showing the light source unit 300 according to the embodiment of the present invention. FIG. 4 is a perspective view showing the light emitting substrate 340 according to the embodiment of the present invention. FIG. 5 is a perspective view showing the substrate pressing member 350 according to the embodiment of the present invention.

Next, a detailed configuration of the light source unit 300 according to the present embodiment will be described based on FIGS. 3 to 5. The light source unit 300 includes a heat sink 310, an electric wire 320, an insulating sheet 330, a light emitting substrate 340, a substrate pressing member 350, a bracket 360, and a lens 370.

The heat sink 310 is formed of a material having a high heat dissipation property, and dissipates the heat generated by the light emitting substrate 340 to the outside. The heat sink 310 includes a plate-shaped substrate mounting surface 311 on which the light emitting substrate 340 is mounted, a plurality of fin portions 312 provided so as to project from the surface of the substrate mounting surface 311 opposite to the surface on which the light emitting substrate 340 is mounted, have. Further, the heat sink 310 can fix the wiring depression 313 formed on a part of the side surface of the board mounting surface 311 so that the electric wire 320 can be inserted, and the board pressing member 350 with a fastening member 380 such as a screw. And the mounting hole 314 so provided.

Further, in the heat sink 310, the power supply unit 200 is attached to both ends of the fin portion 312 opposite to the substrate attachment surface 311.

The electric wire 320 supplies electricity from the power supply unit 200 to the light emitting substrate 340. In addition, the electric wire 320 is arranged in the gap between the fin portions 312, and is connected to the light emitting substrate 340 via the wiring recess 313.

The insulating sheet 330 is made of an insulating material that insulates the light emitting substrate 340 from the heat sink 310 so that electricity does not flow. If the light emitting substrate 340 and the heat sink 310 can be insulated by another means, the insulating sheet 330 may not be used and the light insulating substrate 340 can be insulated by another means.

The light-emitting substrate 340 is a plate-shaped substrate 341, a plurality of light-emitting elements 342 concentrated and mounted in the center of one plate surface of the substrate 341, and mounted outside the light-emitting element 342 on one plate surface of the substrate 341. Mounted component 343. The mounting component 343 is, for example, a connector or the like.

Light emitting elements 342 having different color temperatures are mounted on the light emitting substrate 340. The light emitting elements 342 having different color temperatures change the emitted color temperatures by controlling the currents flowing through the light emitting elements 342. The mounting components 343 are provided so as to be able to supply power to different color temperatures, and four (two pairs) are mounted.

The substrate pressing member 350 has a tubular portion 351 having a tubular shape with open upper and lower ends, and legs 352 provided so as to project from a plurality of locations on the outer peripheral surface of the tubular portion 351. The substrate pressing member 350 fixes the light emitting substrate 340 to the substrate mounting surface 311 of the heat sink 310. The cylindrical portion 351 has an outer diameter smaller than the length of one side of the light emitting substrate 340, and is formed in a size capable of enclosing all of the plurality of light emitting elements 342 mounted on the light emitting substrate 340. Further, the tubular portion 351 has an edge of an opening on one end side thereof abutting on the substrate 341, and a flange portion 351a protruding outward is provided on an edge of the opening on the other end side. The collar portion 351a is to hold the electric wire 320 connected to the mounting component 343 of the substrate 341 so as not to float.

The leg portion 352 includes a leg bottom portion 352a that comes into contact with the substrate 341, a leg side portion 352b that is provided so as to project from a side surface of the leg bottom portion 352a, and a leg fixing portion 352c that is fixed to the substrate mounting surface 311 by a fixing member such as a screw. And have. A step A is provided between the leg bottom portion 352a and the leg fixing portion 352c, and the end of the light emitting substrate 340 is fitted into the step A and fixed. Further, some of the plurality of leg side portions 352b are formed with electric wire groove portions 352ba into which the electric wires 320 are fitted.

The bracket 360 has an inner tubular portion 361 and an outer tubular portion 362. The bracket 360 is fixed to the heat sink 310 so as to cover the board mounting surface 311. At this time, the edge of the opening of the inner cylindrical portion 361 comes into contact with the edge of the opening of the substrate pressing member 350 (the other end side having the flange portion 351a). The bracket 360 and the substrate pressing member 350 are connected so that the inner side surface of the inner cylindrical portion 361 of the bracket 360 and the inner side surface of the cylindrical portion 351 of the substrate pressing member 350 are continuous. Further, the outer cylindrical portion 362 of the bracket 360 is fitted to the side wall portion 113 of the reflector 100 to connect the light source unit 300 and the reflector 100.

The lens 370 controls light from the light emitting element 342 in a predetermined direction, that is, light distribution control. The lens 370 is, for example, a Fresnel lens. Further, the lens 370 is attached so as to cover the opening of the inner cylindrical portion 361 of the bracket 360. Note that the lens 370 may be a cover made of a transparent material, and may not have a purpose of controlling light distribution.

FIG. 6 is a first diagram illustrating a method of attaching the light emitting substrate 340 to the heat sink 310 according to the embodiment of the present invention. FIG. 7 is a second diagram illustrating a method of attaching the light emitting substrate 340 to the heat sink 310 according to the embodiment of the present invention. FIG. 8 is a third diagram illustrating a method of attaching the light emitting substrate 340 to the heat sink 310 according to the embodiment of the present invention. FIG. 9 is a fourth diagram illustrating a method of attaching the light emitting substrate 340 to the heat sink 310 according to the embodiment of the present invention. FIG. 10 is a plan view of heat sink 310 according to the embodiment of the present invention before attachment of substrate pressing member 350. FIG. 11 is a plan view of the heat sink 310 according to the embodiment of the present invention after the substrate pressing member 350 is attached.

Next, a method of attaching the light emitting substrate 340 to the heat sink 310 will be described with reference to FIGS. First, as shown in FIGS. 6 and 10, the insulating sheet 330 and the light emitting substrate 340 are arranged on the substrate mounting surface 311 of the heat sink 310. Then, as shown in FIG. 7, with respect to the heat sink 310 in that state, the substrate pressing member 350 is arranged so as to overlap the light emitting substrate 340, and the substrate pressing member 350 is attached so as to cover a part of the light emitting substrate 340. .. At this time, the end portion of the light emitting substrate 340 is housed inside the leg fixing portion 352c of the substrate pressing member 350. That is, the end of the light emitting substrate 340 is fitted into the step A. In addition, the plurality of light emitting elements 342 are arranged inside the tubular portion 351, and the substrate 341 is exposed to the outside at a portion which does not face the tubular portion 351 of the substrate pressing member 350 and the leg bottom portion 352a. That is, the substrate pressing member 350 covers the light emitting substrate 340 and the heat sink 310 so that the edge portion of the substrate 341 outside the light emitting element 342 and a part of the substrate mounting surface 311 can be confirmed from the outside. The above “exposed to the outside” means a state before the bracket 360 is attached to the heat sink 310, and the same applies to the following.

Next, as shown in FIG. 7, the substrate pressing member 350 is fixed to the substrate mounting surface 311 by the fastening member 380. The substrate pressing member 350 presses the substrate 341 toward the substrate mounting surface 311 side by the tubular portion 351 and the leg bottom portion 352a by attaching the leg fixing portion 352c to the substrate mounting surface 311 by the fastening member 380, and fixes the light emitting substrate 340. .. At this time, movement of the light emitting substrate 340 in the plate thickness direction and in the direction away from the heat sink 310 is suppressed by the tubular portion 351 and the leg bottom portion 352a. Further, the light emitting substrate 340 is restrained from moving in the direction along the plate surface by the leg fixing portion 352c by fitting the end portion thereof into the step A.

Further, since there is a portion of the substrate 341 that can be confirmed without being covered by the substrate pressing member 350 while being held by the substrate pressing member 350, it is possible to prevent the light emitting substrate 340 from being incorrectly held by the substrate pressing member 350. Therefore, it is possible to suppress the mounting failure. Further, the tubular portion 351 presses the substrate 341 while surrounding the plurality of light emitting elements 342. Therefore, there is no gap between the tubular portion 351 and the substrate 341, and the light emission efficiency can be improved without the light from the light emitting element 342 escaping in the direction along the plate surface of the substrate 341.

Finally, as shown in FIGS. 8, 9 and 11, the electric wire 320 is connected to the mounting component 343. At this time, a part of the electric wire 320 is fitted and held in the electric wire groove portion 352ba of the leg side portion 352b. Further, the movement of the electric wire 320 in the direction away from the heat sink 310 is suppressed by the flange 351a. Therefore, when connecting the light source unit 300 and the reflector 100, it is possible to prevent the electric wire 320 from being sandwiched between the reflector 100 and the edge of the opening of the tubular portion 351.

Through the above steps, the light emitting substrate 340 is fixed to the heat sink 310.

As described above, the light source unit 300 according to the present embodiment has the heat sink 310 having the plate-shaped light emitting substrate 340 having the plurality of light emitting elements 342 mounted on one plate surface and the substrate mounting surface 311 to which the light emitting substrate 340 is attached. And are equipped with. Further, a substrate pressing member 350 is provided so as to overlap the light emitting substrate 340 and fixes the light emitting substrate 340 to the substrate mounting surface 311. The substrate pressing member 350 has a tubular portion 351 that surrounds the plurality of light emitting elements 342, and a leg portion 352 that is provided on the outer peripheral surface of the tubular portion 351 and that has a leg fixing portion 352c that is fixed to the substrate mounting surface 311. The light emitting substrate 340 has a region that does not face the substrate holding member 350 outside the portion of the substrate holding member 350 that faces the cylindrical portion 351 in a state of being fixed to the substrate mounting surface 311.

According to the light source unit 300 according to the present embodiment, the light emitting substrate 340 and the substrate pressing member 350 are arranged outside the portion of the substrate pressing member 350 facing the tubular portion 351 in the state of being fixed to the substrate mounting surface 311. It has areas that do not face each other. Therefore, a portion exposed to the outside of the light emitting substrate 340 can be confirmed, and the work can be performed while confirming that the substrate pressing member 350 is arranged at a predetermined fixed position of the light emitting substrate 340, which improves the mounting workability. Can be made.

Further, since a part of the edge portion of the light emitting substrate 340 is exposed to the outside, even if the light emitting substrate 340 is attached at a position deviated from a predetermined fixed position, it can be immediately noticed and immediately. Moreover, the positions of the light emitting substrate 340 and the substrate pressing member 350 can be corrected to correct positions.

Further, the substrate pressing member 350 has a shape that does not cover the entire surface of the light emitting substrate 340 and can be formed in a simple shape.

Here, if the substrate pressing member 350 has a power supply terminal (not shown), the power supply terminal has a power supply portion (not shown) of the light emitting board 340 when the light emitting board 340 is pressed against the board mounting surface 311. Power can be supplied by connecting with. However, since the edge portion of the light emitting substrate 340 is covered by the substrate pressing member 350, there is a possibility that a connection failure between the power supply terminal and the power supply unit may occur, and the power supply unit is also covered to positively connect the power supply terminal. There was a risk that I would make a mistake with the minus.

However, according to the light source unit 300 according to the present embodiment, since a part of the edge portion of the light emitting substrate 340 is exposed to the outside, even when the substrate pressing member 350 includes the power supply terminal, It is possible to suppress a poor connection between the power supply terminal and the power supply unit and an error in connection of the power supply terminal.

Further, in the light source unit 300 according to the present embodiment, the light emitting substrate 340 has the mounting component 343 mounted on one plate surface. The mounting component 343 is disposed in a region outside the substrate pressing member 350 outside the portion of the substrate pressing member 350 facing the cylindrical portion 351 in a state where the light emitting substrate 340 is fixed to the substrate mounting surface 311. There is something.

According to the light source unit 300 according to the present embodiment, the mounting component 343 is mounted on the outside of the portion of the substrate holding member 350 facing the tubular portion 351 in the state where the light emitting substrate 340 is fixed to the substrate mounting surface 311. It is arranged in a region that does not face the pressing member 350. Therefore, the mounting component 343 is exposed to the outside and the work can be performed while confirming the position of the mounting component 343, so that the mounting workability can be improved.

In addition, the light source unit 300 according to the present embodiment includes the electric wire 320 that supplies electricity to the light emitting substrate 340, and the leg portion 352 has the electric wire groove portion 352ba formed on the side surface. Then, the electric wire 320 is connected to the mounting component 343 with a part of the electric wire 320 fitted in the electric wire groove portion 352ba.

According to the light source unit 300 according to the present embodiment, a part of the electric wire 320 is fitted in the electric wire groove portion 352ba formed in the leg side portion 352b, so that the electric wire 320 can be easily fixed.

Further, in the light source unit 300 according to the present embodiment, the leg portion 352 has a leg bottom portion 352a that contacts the light emitting substrate 340, and a step A is provided between the leg bottom portion 352a and the leg fixing portion 352c. There is. Then, the end portion of the light emitting substrate 340 is fitted and fixed in the step A.

According to the light source unit 300 according to the present embodiment, since the end portion of the light emitting substrate 340 is fitted and fixed in the step A, it is possible to suppress the movement of the light emitting substrate 340 in the direction along the plate surface. ..

As a modified example of the present embodiment, in the light emitting substrate 340, the plurality of light emitting elements 342 may be arranged at positions closer to the side edges from the center. Further, the leg bottom portion 352a may be fixed to the board mounting surface 311 so as to sandwich the board 341. In addition, the tubular portion 351 may lack a part of the opening. Further, the substrate 341 may be pressed by only one of the tubular portion 351 and the leg bottom portion 352a. The number of legs 352 of the substrate pressing member 350 is not limited to three and may be two or four or more. Alternatively, one of the legs 352 may be formed, and the other may be formed in a claw shape.

Further, in the present embodiment, the light emitting substrate 340 and the power supply unit 200 that can be adjusted in color have been described, but the substrate pressing member 350 can also be used for a lighting fixture that does not have a control function such as color adjustment.

1 Lighting Equipment, 100 Reflector, 110 Reflector Main Body, 111 Reflector, 112 Reflector Collar, 113 Side Wall, 120 Spring, 200 Power Supply Unit, 210 Power Supply Main Body, 220 Terminal Block, 220A First Terminal Block, 220B Second Terminal Stand, 300 light source unit, 310 heat sink, 311 substrate mounting surface, 312 fin portion, 313 wiring recess, 314 mounting hole, 320 electric wire, 330 insulating sheet, 340 light emitting substrate, 341 substrate, 342 light emitting element, 343 mounting component, 350 Substrate pressing member, 351 cylinder part, 351a flange part, 352 leg part, 352a leg bottom part, 352b leg side part, 352ba wire groove part, 352c leg fixing part, 360 bracket, 361 inner cylinder part, 362 outer cylinder part, 370 lens 380 Fastening member, A step.

Claims (7)

A plate-shaped light emitting substrate having a plurality of light emitting elements mounted on one plate surface,
A heat sink having a substrate mounting surface to which the light emitting substrate is mounted;
A substrate pressing member that is disposed so as to overlap with the light emitting substrate and that fixes the light emitting substrate to the substrate mounting surface,
The substrate pressing member includes a tubular tubular portion that surrounds the plurality of light emitting elements, and a leg portion that is provided on an outer peripheral surface of the tubular portion and has a leg fixing portion that is fixed to the substrate mounting surface.
The light emitting substrate is
When fixed to the board mounting surface,
A light source unit having an area that does not face the substrate holding member outside the portion of the substrate holding member that faces the cylindrical portion. The light emitting substrate has a mounting component mounted on the one plate surface,
The mounted parts are
The light source unit according to claim 1, wherein the light source unit is arranged in the region. The light source unit according to claim 2, wherein the mounting component is a connector. The board mounting surface is formed so as to entirely cover the other plate surface of the light emitting board,
The light source unit according to claim 2, wherein the leg portions are provided so as to project from a plurality of locations on an outer peripheral surface of the tubular portion. An electric wire for supplying electricity to the light emitting substrate is provided,
The leg portion has a wire groove formed on the side surface,
The light source unit according to any one of claims 2 to 4, wherein the electric wire is connected to the mounting component while a part of the electric wire is fitted in the electric wire groove portion. The leg portion has a leg bottom portion that contacts the light emitting substrate,
A step is provided between the leg bottom portion and the leg fixing portion,
The light source unit according to claim 1, wherein an end portion of the light emitting substrate is fitted into and fixed to the step. A light source unit according to any one of claims 1 to 6,
A reflector that is provided on the emission side of the light source unit and reflects the emitted light,
A lighting fixture, comprising: a power supply unit that supplies power to the light source unit.

Images