JP2013045630A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of applying light from an LED emission part downward to thereby prevent unevenness of luminance.SOLUTION: The lighting fixture 10 is provided with a fixture body 11 capable of being fitted to a ceiling, a floor side protrusion 12 arranged on a floor side of the fixture body 11, a plurality of LED emission parts 13 arranged in a ring shape on a floor side face of the fixture body 11, a fitting part 14 which is housed in the floor side protrusion 12 for fitting the fixture body 11 to the ceiling, a power supply part which is housed in the floor side protrusion 12 and supplies power to each of the LED emission parts 13, and a cover 16 to be fitted to the fixture body 11 so as to cover each of the LED emission parts 13. Each of the LED emission parts 13 is arranged in the vicinity of the cover 16 on the floor side face of the fixture body 11.

Description

  The present invention relates to a lighting fixture that irradiates light from an LED light emitting unit downward.

Conventionally, there has been known a lighting fixture including a disk-shaped fixture body, a plurality of LED light emitting portions arranged in an annular shape on the fixture body, and a substantially conical wall formed at the center of the fixture body. (For example, refer to Patent Document 1).
Patent document 1 is provided with the lamp cover attached to an instrument main body, and the cover body attached to the outer side of a lamp cover.

Utility Model Registration No. 3165661 (FIG. 1, paragraphs 0017, 0018)

Patent Document 1 has an external configuration that releases heat generated from the LED light emitting part to the outside and can radiate heat, and the outer thickness of the instrument body is thinned to cause aesthetics, allowing the LED light emitting part to be replaced. It is easy to do and does not pollute the environment.
However, in Patent Document 1, since a substantially conical wall is provided in the central portion of the appliance main body, when the lamp cover is viewed from the floor side, the central portion of the lamp cover appears dark, and the luminance unevenness in the entire lamp cover. Occurs.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a lighting apparatus that can prevent uneven brightness.

  The lighting fixture according to the present invention includes a fixture main body, a mounting portion for mounting the fixture main body on a ceiling surface, a plurality of LED light emitting portions provided in a peripheral portion of the fixture main body, and power to each of the LED light emitting portions. A power supply unit to be supplied, and a cover provided on the peripheral portion of the instrument body so as to cover each LED light emitting unit, and the distance between the instrument body and the cover is at the center of the instrument body On the other hand, the peripheral part of the instrument body is provided at a closer position.

  In the lighting fixture according to the present invention, each of the LED light emitting portions has a lens, and the lens is a wide-angle lens that distributes light to a central portion of the cover.

  The lighting fixture which concerns on this invention has a cover member which covers the said cover side in the said attaching part provided in the said center part of the said fixture main body.

  The lighting apparatus according to the present invention has an effect of preventing luminance unevenness.

The disassembled perspective view of the lighting fixture of 1st Embodiment which concerns on this invention The vertical sectional view of the lighting fixture of a 1st embodiment concerning the present invention. 1 is a partially broken vertical sectional view around a lens according to a first embodiment of the present invention. The vertical sectional view of the modification of the lighting fixture of a 1st embodiment concerning the present invention The vertical sectional view of other modifications of the lighting fixture of a 1st embodiment concerning the present invention The exploded perspective view of the lighting fixture of 2nd Embodiment which concerns on this invention Luminance distribution graph of lighting apparatus of the first embodiment Luminance distribution graph of lighting apparatus of the second embodiment Luminance distribution graph of luminaire used for comparative example

Hereinafter, the lighting fixture of several embodiment which concerns on this invention is demonstrated with reference to drawings.
(First embodiment)
As shown in FIG. 1, the lighting apparatus 10 according to the first embodiment of the present invention includes an apparatus main body 11 attached to a ceiling (see FIG. 2) 90 and a floor-side convex portion provided on the floor side of the apparatus main body 11. 12 and a plurality of LED light emitting units 13 provided in an annular shape on the floor side of the instrument body 11.
The lighting fixture 10 is accommodated in the floor-side convex portion 12, an attachment portion 14 for attaching the fixture main body 11 to the ceiling 90, and a power source portion that is accommodated in the floor-side convex portion 12 and supplies power to each LED light emitting portion 13. (See FIG. 2) 15.

The lighting fixture 10 includes a cover 16 attached to the fixture main body 11 so as to cover each LED light emitting portion 13, and each LED light emitting portion 13 is provided at a position near the cover 16 on the floor side of the fixture main body 11.
In the lighting fixture 10, each LED light emitting unit 13 has a lens 17. The lens 17 is a wide-angle lens that distributes light to the center of the cover 16.
The lighting fixture 10 is provided with a hole 18 for operating the mounting portion 14 at the center of the floor-side convex portion 12, and includes a lid member 19 that closes the hole 18.
The lighting fixture 10 is provided with a night light 20 provided with a light receiving element (not shown) that receives a remote control signal on the side of the hole 18.

The instrument body 11 is formed in a disc shape using a thin die-cast member or the like. A plurality of cover engaging portions 21 for rotating the cover 16 are attached to the outer edge portion on the floor side of the instrument main body 11.
The LED light emitting unit 13 includes an arc-shaped LED substrate 22 that is separated so as to divide the circumference into four parts, and a plurality of LEDs 23 on the inner peripheral side and a plurality of LEDs 24 on the outer peripheral side are LED on the floor side of the LED substrate 22. Sealed along the substrate 22.
The LED board 22 is attached to the lower surface of the floor-side convex portion 12 and has a printed circuit (not shown) that is electrically connected to the LED 23 and the LED 24, and the printed circuit is electrically connected to the power supply unit 15. The
In addition, what has different characteristics, such as color temperature, can apply to the some LED23 of inner peripheral side, and the some LED24 of outer peripheral side, respectively.

The attachment portion 14 is an adapter that is mechanically and electrically connected to a hook ceiling (see FIG. 2) 91 installed on the ceiling 90, and is electrically connected to the power supply portion 15.
The power supply unit 15 incorporates an electrical component such as an inverter for converting the commercial AC current fed from the hook ceiling 91 into a printed circuit on the LED board 22 and supplying it to a DC power supply.
The cover 16 is made of, for example, milky white resin and is fixed to the cover engaging portion 21 of the instrument main body 11.

The lens 17 is made of a resin having translucency, and is formed in an annular shape covering the lower side of the plurality of LED light emitting units 13.
The hole 18 is formed in an oval shape having an inner diameter that is sufficiently larger than the outer diameter of the mounting portion 14.
The lid member 19 has an oval outer shape having an outer diameter dimension larger than the inner diameter dimension of the hole portion 18, and is formed in a shell shape with a central portion slightly protruding from the outer edge portion.
The lid member 19 is detachably attached to the hole 18 by being secured to the hole 18 via an engagement portion (not shown). Therefore, the cover member 19 can be operated to operate the attachment portion 14 disposed inside the hole portion 18 by being removed.

As shown in FIG. 2, the appliance main body 11 has a ceiling-side convex portion 25 at the top of the floor-side convex portion 12, so that the power source 15 is provided between the ceiling-side convex portion 25 and the floor-side convex portion 12. Be placed.
The lens 17 includes a concave inner peripheral incident portion 26 covering the inner peripheral LED 23 of the LED light emitting portion 13, and a convex inner peripheral emission portion 27 on the outer surface facing the incident portion 26.
The lens 17 includes a concave outer peripheral incident portion 28 covering the LED 24 on the outer peripheral side of the LED light emitting portion 13, and a convex outer peripheral emission portion 29 on the outer surface facing the incident portion 28.
The lens 17 has a concave portion 30 between the inner peripheral emission portion 27 and the outer peripheral emission portion 29.
Therefore, the lens 17 constitutes a part of the LED light emitting unit 13 together with the inner peripheral LED 23 and the outer peripheral LED 24.

The lens 17 is formed with a not-shown embossed portion in the incident portion 26 and the incident portion 28 or in the emission portion 27 and the emission portion 29 and is a wide-angle lens. The light component emitted from the LED 24 is diffused and irradiated in the range of the angle α1.
The lens 17 has a limited range A that protrudes most toward the cover 16 side. The lens 17 is arranged at a position where the top B is close to the cover 16.
That is, since the LED light emitting unit 13 is provided at a position close to the cover 16, the light reaches the central part of the cover 16, so that the central part of the cover 16 does not become dark.
Therefore, since the LED light emitting unit 13 is provided at a position close to the cover 16, luminance unevenness does not occur.

As shown in FIG. 3, the top B of the lens 17 has a protruding dimension L <b> 2 that is larger than the protruding dimension L <b> 1 from which the nightlight 20 protrudes below the instrument body 11.
Therefore, since the night light 20 is not irradiated with the light component from the LED light emitting unit 13 through the lens 17, the night light 20 does not cause a shadow.

As shown in FIG. 4, in the modification of the lighting fixture 10, the protruding dimension L3 from the fixture main body 11 of the top B of the lens 17 in the LED light emitting unit 13 is larger than the protruding dimension L4 from the fixture main body 11 in the lid member 19. small.
Therefore, the projection dimension L3 of the top portion B of the lens 17 from the instrument main body 11 is smaller than the projection dimension L4 of the lid member 19 from the instrument main body 11, and thus the light is emitted from the emission part 27 and the emission part 29 of the lens 17. The central part of the cover 16 is not darkened by the light component.
Therefore, when the light reaches the central portion of the cover 16, the central portion of the cover 16 is not darkened, and luminance unevenness does not occur.

As shown in FIG. 5, in another modification of the lighting fixture 10, the floor-side convex portion 31 having a projection dimension L 6 equivalent to the projection dimension L 5 from the fixture body 11 at the top B of the lens 17 is provided in the fixture body 11. Prepared.
In this modification, the LED substrate 22 is not attached to the lower surface of the floor-side convex portion 31, and is attached to the lower surface of the appliance body 11 on the outer peripheral side of the floor-side convex portion 31.
For this reason, the projection dimension L5 of the top B of the lens 17 from the instrument body 11 is equal to the projection dimension L6 of the floor-side convex part 31 from the instrument body 11, so that the projection is emitted from the exit part 27 and the exit part 29 of the lens 17. The center portion of the cover 16 does not become dark due to the light component.
Therefore, the central portion of the cover 16 is not darkened, and uneven brightness does not occur.

As mentioned above, according to the lighting fixture 10 of 1st Embodiment which concerns on this invention demonstrated, since the LED light emission part 13 is provided in the position close | similar to the cover 16, when light reaches | attains the center part of the cover 16, The central part of the cover 16 does not become dark.
Therefore, according to the luminaire 10, since the LED light emitting unit 13 is provided at a position close to the cover 16, uneven brightness can be prevented.

According to the lighting fixture 10, since the lens 17 is a wide-angle lens that distributes light to the central portion of the cover 16, the central portion of the cover 16 does not become dark when the light reaches the central portion of the cover 16. .
Therefore, according to the lighting fixture 10, uneven brightness can be prevented.

According to the luminaire 10, the lid member 19 prevents the shadow caused by the edge of the hole 18 when the hole 18 is irradiated with light, so that the central part of the cover 16 does not become dark.
Therefore, according to the lighting fixture 10, uneven brightness can be prevented.

(Second Embodiment)
Next, the lighting fixture of 2nd Embodiment which concerns on this invention is demonstrated.
In the following embodiments, components that are the same as those in the first embodiment described above or components that are functionally similar are denoted by the same or corresponding reference numerals in the drawings, and the description thereof is simplified or omitted. To do.

As shown in FIG. 6, the lighting device 40 according to the second embodiment of the present invention employs a lid member 41 provided with a plurality of fins 42.
The fins 42 of the lid member 41 have a function of diffusing the irradiated light component and a function of radiating heat transmitted to the lid member 41.

According to the lighting apparatus 40 of the second embodiment, the cover 42 is formed by diffusing the light irradiated toward the hole 18 by the fin 42 of the lid member 41 to prevent the shadow generated at the edge of the hole 18. The central part of 16 does not darken.
Therefore, according to the lighting fixture 40, uneven brightness can be prevented.

Next, the comparative example performed in order to confirm the effect of this invention is demonstrated.
In the comparative example, the luminance distribution when the lid member 19 of the lighting fixture 10 of the first embodiment is used, the luminance distribution when the lid member 41 of the lighting fixture 40 of the second embodiment is used, and the lid member are used. The brightness distribution of the lighting fixtures that have not been compared.
In the graphs shown in FIGS. 7 to 9, the vertical axis represents luminance, and the horizontal axis represents luminance distribution in the central portion and the peripheral portion of the lighting fixture.

As shown in FIG. 7, the lid member 19 of the lighting apparatus 10 of the first embodiment has a high luminance value because the light component is reflected at the outer edge of the hole 18.
Further, since the light component is reflected by the lid member 19 at the center of the hole 18, a high luminance value equivalent to that of the outer edge of the hole 18 was exhibited.

As shown in FIG. 8, the lid member 41 of the lighting fixture 40 of the second embodiment has a high luminance value because the light component is reflected at the outer edge of the hole 18.
Moreover, in the center part of the hole part 18, since the light component was reflected by the fin 42 of the cover member 41, the high luminance value equivalent to the outer edge part of the hole part 18 was shown.

  On the contrary, as shown in FIG. 9, in the lighting fixture that does not use the lid member, although the light component is reflected at the outer edge portion of the hole portion 18, a high luminance value is shown, but the central portion of the hole portion 18. Then, since the light component is not reflected, a low luminance value, that is, a shadow is generated.

  As is clear from the comparative example, the luminaire 10 in which the lid member 19 is attached to the hole 18 and the luminaire 40 in which the lid member 41 is attached to the hole 18 are compared to the case where the lid member is not attached to the hole 18. It was found that a much higher luminance value can be obtained.

  In addition, in the lighting fixture of this invention, LED light emission part, an attaching part, a power supply part, a cover, etc. are not limited to each embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.

DESCRIPTION OF SYMBOLS 10,40 Lighting fixture 11 Appliance main body 12,31 Floor side convex part 13 LED light emission part 14 Mounting part 15 Power supply part 16 Cover 17 Lens 18 Hole part 19,41 Cover member

Claims (3)

An instrument body;
An attachment portion for attaching the appliance body to the ceiling surface;
A plurality of LED light emitting portions provided in the peripheral portion of the instrument body;
A power supply unit for supplying power to each of the LED light emitting units;
A cover provided on the peripheral part of the instrument body so as to cover each LED light emitting part,
The lighting fixture provided in the position where the said peripheral part of the said instrument main body is near the distance of the said instrument main body and the said cover with respect to the center part of the said instrument main body. The lighting fixture according to claim 1,
Each LED light emitting unit has a lens,
The lighting fixture whose said lens is a wide angle lens which distributes light to the center part of the said cover. The lighting fixture according to claim 1 or 2,
The lighting fixture which has a cover member which covers the said cover side in the said attaching part provided in the said center part of the said fixture main body.

Images