JP2014222584A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of making a light-dark difference small by radiating light around a flange part exposed at an undersurface of a ceiling material.SOLUTION: At a fixture body 20 which can be arranged on a rear side of a ceiling material 11 from a mounting hole 12 provided at the ceiling material 11, a circuit board 28 of a light-emitting part 21 is supported. Also, at the fixture body 20, a flange part 26 for surrounding the light-emitting part 21 and also capable of coming into contact with the peripheral part of the mounting hole 12 on a surface 111 of the ceiling material 11 is supported. Then, the light-emitting part 21 has: a first LED 291 for radiating light in the direction getting away from the circuit board 28 along a thickness direction of the circuit board 28; and a second LED 292 for radiating light toward the flange part 26. Thus, a light-dark difference between a lighting fixture 10A and the periphery can be made to be small by radiating light around the flange part 26.

Description

  The present invention relates to a lighting fixture that is attached to a mounting hole provided in a ceiling material or the like and illuminates mainly downward.

Conventionally, the lighting fixture attached to the attachment hole provided in the ceiling material is known (for example, refer patent document 1).
As shown in FIG. 8A, the lighting fixture 100 is an embedded type that is embedded in a ceiling, a wall surface, or the like. (Not shown).
In addition, a frame body portion 103 that is fitted in an opening formed in a ceiling or the like and holds a light source or the like, a terminal block 104 to which a power supply line for receiving power supply from a commercial power source is connected, and a frame body portion 103 And an attachment spring 105 for fixing to a ceiling or the like.

In addition, as illustrated in FIG. 8B, the lighting fixture 100 includes a substrate 106, a heat sink member 108 for dissipating heat of the LED 107 mounted on the substrate 106, and a gap between the substrate 106 and the heat sink member 108. And a holding member 109 provided. In addition, the lighting fixture 100 includes a protective cover 110 that protects the LED 107.
As shown in FIG. 8C, the LED 107 has an LED 107 </ b> C having a low color temperature disposed in a substantially central region of the substrate 106. In addition, LEDs 107A and LEDs 107B having a higher color temperature than those of the LEDs 107C are alternately arranged around the LEDs 107C so that the same type is not adjacent to each other.

JP 2012-113958 A (FIG. 2)

However, in the conventional lighting device 100 described in Patent Document 1 described above, the flange portion 103A of the frame body portion 103 is attached to the lower surface of the ceiling material in contact therewith.
Since the LED 107 cannot be attached to the collar portion 103A, there is a problem in that the periphery of the collar portion 103A becomes dark and a difference in brightness between the lighting fixture 100 and the surrounding area becomes large.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a luminaire that can reduce the difference in brightness by irradiating light around the flange exposed on the lower surface of the ceiling material.

  The lighting fixture of the present invention is supported by the fixture body, a fixture body that can be placed on the back side of the ceiling material from an attachment hole provided in the ceiling member, a light emitting portion in which a circuit board is supported by the fixture body, And a flange that surrounds the light emitting portion and can contact a peripheral portion of the mounting hole on the surface of the ceiling material, and the light emitting portion is separated from the circuit board along a thickness direction of the circuit board. It has 1st LED which irradiates light, and 2nd LED which irradiates light toward the said collar part.

  Moreover, as for the lighting fixture of this invention, said 2nd LED is arrange | positioned along the said collar part.

  Furthermore, the lighting fixture of this invention has the reflective surface inclined and provided between the said circuit board and the said collar part, and as for the said 2nd LED, an optical axis is the said circuit board rather than the surface of the said collar part. It is arranged on the side away from.

  In this invention, a light emission part has 1st LED which irradiates light in the direction away from a circuit board along the thickness direction of a circuit board, and 2nd LED which irradiates light toward a collar part. For this reason, the lighting fixture which has the effect of irradiating the circumference | surroundings of a collar and making a collar bright, and reducing the brightness difference between a lighting fixture and the circumference | surroundings can be provided.

The longitudinal cross-sectional view of the lighting fixture of 1st Embodiment which concerns on this invention LED package and shade vertical section The expanded sectional view which shows the relationship between a 2nd LED unit and a collar part (A) is sectional drawing of a 1st LED unit, (B) is sectional drawing of a 2nd LED unit, (C) is sectional drawing which shows the 3rd LED unit as a modification of a 2nd LED unit. The expanded sectional view equivalent to FIG. 3 which shows the principal part of the lighting fixture of 2nd Embodiment concerning this invention. 2 is a longitudinal sectional view of the FIG. 2 president showing the main part of the lighting fixture of the third embodiment according to the present invention. The longitudinal cross-sectional view of the LED package of the lighting fixture of 4th Embodiment which concerns on this invention (A) is the perspective view which looked at the conventional lighting fixture from upper direction, (B) is an exploded perspective view, (C) is a front view of a light-emitting device.

(First embodiment)
Hereinafter, the lighting fixture of 1st Embodiment is demonstrated using drawing.
As shown in FIG. 1, the luminaire 10A of the first embodiment can be used as a downlight that is attached to an attachment hole 12 provided in a ceiling material 11 that is a surface to be attached and illuminates the lower part.

The lighting fixture 10 </ b> A includes a fixture main body 20 that can be placed on the back side of the ceiling material 11 from the mounting hole 12. The fixture body 20 includes a lamp body 22 having an LED package 21 </ b> A that is a light emitting section, and a frame section 23 that is integrally provided on the lower side of the lamp body 22.
The lamp body 22 has an overall cylindrical outer peripheral wall 221, and a large number of heat radiating plates 222 are provided outside the outer peripheral wall 221 for releasing heat generated by the LED package 21A to the outside.

The frame portion 23 includes a cylindrical body 25 provided continuously to the lower end of the outer peripheral wall 221 of the lamp body 22, and a flange portion 26 provided on the lower end portion of the cylindrical body 25. The flange portion 26 surrounds the LED package 21 </ b> A and contacts the peripheral portion of the mounting hole 12 on the ceiling surface 111 that is the surface of the ceiling material 11.
The cylindrical body 25 has a truncated cone shape that expands in a direction away from the LED package 21A (ie, downward).

The collar portion 26 is provided around the lower end portion of the cylindrical body 25 and has a ring plate shape protruding outward. The outer diameter of the collar portion 26 is larger than the inner diameter of the attachment hole 12, and abuts against the ceiling surface 111 of the ceiling material 11 in a state where the lighting fixture 10 </ b> A is attached to the attachment hole 12.
A reflective surface 32 is provided between the bottom plate 24 and the flange portion 26 of the instrument body 20. The reflection surface 32 is inclined so as to go away from the ceiling surface 111 as it goes from the outer periphery of the bottom plate 24 toward the flange portion 26, that is, downward.
In addition, the lower surface of the reflective surface 32 and the collar part 26 is processed so that light may be reflected.

An attachment spring 27 for fixing the frame portion 23 to the attachment hole 12 is provided on the outer peripheral surface 251 of the cylindrical body 25. A plurality of (for example, three) attachment springs 27 are provided at substantially equal intervals along the outer peripheral surface 251 of the cylindrical body 25.
The mounting spring 27 is always urged downward (in the direction of arrow A in FIG. 1). 12 is attached.

A bottom plate 24 is integrally provided on the lower end surface of the instrument body 20. The LED package 21A is attached to the lower surface 241 (see FIG. 3) of the bottom plate 24.
A power supply unit 50 is placed on the back surface 112 of the ceiling material 11. The power supply unit 50 is connected to a commercial power supply (not shown) wired on the back of the ceiling. The power supply unit 50 is connected to the LED package 21A of the lamp body 22 by an electric wire 51, and supplies lighting power to the LED package 21A.
Here, the power supply unit 50 is provided separately from the lamp body 22 and placed on the upper surface of the ceiling member 11, but the power supply section 50 can be integrally attached to the lamp body 22.

A shade 40 that covers the front (downward) of the LED package 21 </ b> A and covers the outside of the collar portion 26 is attached to the lower side of the instrument body 20.
The seed 40 is made of milky white translucent resin.

As shown in FIGS. 1 and 2, the LED package 21 </ b> A includes a disk-shaped package substrate 28 attached to the lower surface 241 of the bottom plate 24 of the lamp body 22 and an LED unit 29 mounted on the package substrate 28.
As shown in FIG. 2 and FIGS. 4A to 4C, in the LED unit 29, the LED chip 33 is attached to a rectangular plate-shaped base 31, and the package substrate 28 is mounted via the base 31. It is mounted on the surface 281.

The LED units 29 are mounted in a plurality of rows (here, 4 rows) substantially concentrically with respect to the center CP of the package substrate 28.
Note that it is desirable that the intervals between the LED units 29 adjacent in the outer row with respect to the center CP of the package substrate 28 and the intervals between the LED units 29 adjacent in the inner row are substantially equal.
Accordingly, the present invention is not limited to the case where they are arranged concentrically in a circular shape.

The LED package 21 </ b> A includes a first LED unit (first LED) 291 and a second LED unit (second LED) 292.
As shown in FIG. 4A, the first LED unit 291 has the LED chip 33 attached to the lower surface 311 of the rectangular plate-shaped base 31 and is separated from the package substrate 28 along the thickness direction of the package substrate 28. Irradiate light in the direction, that is, downward.

As shown in FIG. 4B, the second LED unit 292 has the LED chip 33 attached to the side surface 312 of the base 31 and irradiates light in a direction parallel to the mounting surface 281 of the package substrate 28.
The second LED unit 292 can be used by rotating the first LED unit 291 by 90 degrees and attaching it to the mounting surface 281 in the vertical direction. In this case, the same LED unit 29 can also be used by providing connection portions on two orthogonal surfaces of the base 31.

As shown in FIGS. 2 and 3, the second LED unit 292 is arranged along the flange portion 26 on the outer peripheral portion of the package substrate 28. And the 2nd LED unit 292 is mounted so that light may be irradiated toward the collar part 26, ie, an outer side.
Further, as shown in FIG. 3, the second LED unit 292 has a side (that is, a lower side) farther from the package substrate 28 than the lower surface (front surface) 261 of the flange portion 26 without the optical axis LB1 hitting the reflection surface 32. Implemented to pass.

The second LED unit 292 is not limited to the case where the light is irradiated in the direction parallel to the mounting surface 281 of the package substrate 28 as described above. As a modified example of the second LED unit 292, as shown in FIG. 4C, the LED chip 33 is attached to the inclined surface 313 provided on the base 31, and light is irradiated obliquely downward intersecting the mounting surface 281. A third LED unit 293 can also be used.
Also in this case, the 3rd LED unit 293 can irradiate light to the collar part 26 side.
In addition, the first LED units 291 are arranged at appropriate intervals inside the second LED units 292 provided on the outer peripheral portion of the package substrate 28.

Next, the effect of 10 A of lighting fixtures of 1st Embodiment is demonstrated.
As shown in FIG. 1, a package substrate 28 of an LED package 21 </ b> A is supported on a fixture main body 20 that can be disposed on the back side of the ceiling material 11 from an attachment hole 12 provided in the ceiling material 11. The fixture body 20 supports a flange portion 26 that surrounds the LED package 21 </ b> A and can contact the peripheral portion of the mounting hole 12 in the ceiling surface 111 of the ceiling material 11.

As shown in FIG. 2, the LED package 21 </ b> A irradiates light toward the first LED unit 291 that irradiates light in a direction away from the package substrate 28 along the thickness direction of the package substrate 28, and the flange portion 26. And a second LED unit 292.
For this reason, when the LED unit 29 is supplied with lighting power from the power supply unit 50, the second LED unit 292 irradiates light around the collar part 26, so the collar part 26 becomes bright, and the lighting fixture 10A and the surroundings The difference in brightness can be reduced.

  Moreover, since the 2nd LED unit 292 which irradiates light toward the collar part 26 is arrange | positioned along the collar part 26, it can irradiate light to the collar part 26 over the perimeter.

Further, as shown in FIG. 3, an inclined reflecting surface 32 is provided between the package substrate 28 and the flange portion 26, and the side where the optical axis LB1 is farther from the package substrate 28 than the lower surface 261 of the flange portion 26. The 2nd LED unit 292 was arrange | positioned so that it might pass.
For this reason, since the optical axis LB1 of the 2nd LED unit 292 which goes to the collar part 26 is not disturbed by the reflective surface 32, the collar part 26 can be made bright.
Further, as shown in FIG. 2, the light LB2 irradiated to the instrument body 20 side from the optical axis LB1 of the second LED unit 292 strikes the reflection surface 32 and is reflected downward (light LB3), so the second LED unit 292 Can be used for illumination effectively.

(Second Embodiment)
Next, the lighting fixture of 2nd Embodiment is demonstrated.
In addition, the same code | symbol is attached | subjected to the site | part which is common in 10 A of lighting fixtures of 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.
As shown in FIG. 5, in the lighting fixture 10 </ b> B of the second embodiment, the optical axis LB <b> 1 of the second LED unit 292 that is arranged along the collar part 26 and emits light toward the collar part 26 is It is at the height of the lower surface 261 position.

  As described above, according to the lighting fixture 10B of the second embodiment described above, a part of the light LB1 from the second LED unit 292 arranged along the collar portion 26 is irradiated on the reflecting surface 32 and reflected downward. . Moreover, since a part is irradiated to the outer side of the collar part 26 along the lower surface 261 of the collar part 26, the collar part 26 becomes bright, and the brightness difference between the lighting fixture 10B and the circumference | surroundings can be made small.

(Third embodiment)
Next, the lighting fixture of 3rd Embodiment is demonstrated.
In addition, suppose that the same code | symbol is attached | subjected to the site | part which is common in the lighting fixture 10A of 1st Embodiment mentioned above, and the lighting fixture 10B of 2nd Embodiment, and the overlapping description is abbreviate | omitted.
As shown in FIG. 6, in the lighting fixture 10C of 3rd Embodiment, the reflective surface 32 (refer FIG. 2) is not provided between the baseplate 24 and the collar part 26 of the fixture main body 20. As shown in FIG. For this reason, the bottom plate 24 of the instrument main body 20 and the collar part 26 become the same surface.

As described above, according to the lighting fixture 10 </ b> C of the third embodiment described above, a part of the light emitted from the second LED unit 292 provided on the outer peripheral portion of the package substrate 28 to the flange portion 26 side is irradiated upward. (Light LB4). The light LB4 is reflected by the lower surface 261 of the collar portion 26 and is irradiated obliquely downward on the outer side (light LB5).
Thereby, since the lower surface of the collar part 26 and the outer side of the collar part 26 become bright, the brightness difference between 10 C of lighting fixtures and the circumference | surroundings can be made small.

(Fourth embodiment)
Next, the lighting fixture of 4th Embodiment is demonstrated.
In addition, the same code | symbol is attached | subjected to the site | part which is common in the lighting fixture 10A of 1st Embodiment thru | or the lighting fixture 10C of 3rd Embodiment mentioned above, and the overlapping description is abbreviate | omitted.
As shown in FIG. 7, in the LED package 21 </ b> D of the lighting apparatus 10 </ b> D of the fourth embodiment, the second LED unit 292 that emits light toward the flange portion 26 side is not the outermost row, for example, the second row from the outside. Is arranged. In the outermost row, a first LED unit 291 that emits light downward is arranged.
Furthermore, the 3rd LED unit 293 which irradiates light to the outer diagonal downward mentioned above in FIG.4 (C) can be provided inside the 2nd LED unit 292, for example.

As described above, according to the lighting fixture 10D of the fourth embodiment described above, light is emitted outward from the second LED unit 292 and the third LED unit 293.
Thereby, since the lower surface of the collar part 26 and the outer side of the collar part 26 become bright, the brightness difference between 10D of lighting fixtures and the circumference | surroundings can be made small.

  The lighting fixture of the present invention is not limited to the above-described embodiments, and appropriate modifications and improvements can be made.

10A, 10B, 10C, 10D Lighting fixture 11 Ceiling material 111 Ceiling surface (surface)
12 Mounting hole 20 Instrument body 21A, 21D LED package (light emitting part)
26 collar part 261 bottom surface (surface of collar part)
28 Package substrate (circuit board)
291 First LED unit (first LED)
292 Second LED unit (second LED)
32 Reflecting surface LB Optical axis

Claims (3)

An instrument body that can be placed on the back side of the ceiling material from a mounting hole provided in the ceiling material,
A light-emitting unit in which a circuit board is supported by the instrument body;
A flange that is supported by the instrument body and surrounds the light emitting part and can contact the peripheral part of the mounting hole on the surface of the ceiling material;
The light emitting unit includes a first LED that emits light in a direction away from the circuit board along a thickness direction of the circuit board, and a second LED that emits light toward the flange. The lighting fixture according to claim 1,
The second LED is a luminaire arranged along the flange. The lighting fixture according to claim 1 or 2,
Having a reflective surface provided inclined between the circuit board and the flange,
The second LED is a luminaire in which an optical axis is arranged on a side farther from the circuit board than a surface of the flange portion.

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