JP2013012402A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of thinning in comparison with the case in which a recessed section for an evacuation is not arranged.SOLUTION: The lighting fixture includes two straight tube type LED lamps 1 as a light source, and a reflecting plate 2 for respectively reflecting light of respective straight tube type LED lamps 1. Each straight tube type LED lamp 1 has a body of circular pillar shape, and bases respectively arranged on both ends of the body in the axial direction. A light-emitting section 14 of the body is arranged on a portion having a designated angle only around an axis among an outer peripheral surface of the body, and a non-light-emitting section 15 is arranged on a portion having the remaining designated angle around the axis. The recessed section 21 for an evacuation wherein the non-light-emitting section 15 of the straight tube type LED lamp 1 is stored and the light-emitting section 14 is projected is arranged on the reflecting plate 2. The lighting fixture can be thinned in comparison with the case in which the recessed section 21 for an evacuation is not arranged.

Description

  The present invention relates to a lighting fixture.

  In recent years, a straight tube LED lamp 1 using a light emitting diode 11 is provided as an alternative to a straight tube fluorescent lamp as shown in FIG. 5 (see, for example, Patent Document 1). Said straight tube | pipe type LED lamp 1 is formed in the same dimension shape as a straight tube | pipe type fluorescent lamp, and has a column-shaped main-body part and the nozzle | cap | die provided in the both ends of the axial direction of a main-body part. A plurality of (only one is shown) light emitting diodes 11 are mounted on one surface (hereinafter referred to as “mounting surface”) in a cylindrical cylinder 12 made of a light-transmitting material. The printed wiring board 13 is accommodated. The mounting surface of the printed wiring board 13 is parallel to the axial direction of the cylinder 12, and the light emitting diodes 11 are mounted in a straight line along the axial direction of the cylinder 12. On the outer peripheral surface of the straight tube type LED lamp 1, one side (light emitting diode 11 side) becomes a light emitting portion 14 from which light is emitted, and the other side on the intersection with the extended surface of the mounting surface of the printed wiring board 13. Becomes the non-light emitting portion 15 from which no light is emitted.

JP 2010-80313 A

  By the way, as a lighting fixture for ceilings using a straight tube fluorescent lamp, light emitted upward from the fluorescent lamp L as in the examples shown in FIGS. 6 and 7 and the examples shown in FIGS. There is a thing provided with the reflecting plate 2 which reflects below.

  6 and 7 each have two to four sockets 3 to which one end of each fluorescent lamp L is connected, and two fluorescent lamps L are attached. The reflecting plate 2 has two housing recesses 20 each housing one fluorescent lamp L, and reflects the light of the fluorescent lamp L on the inner surface of the housing recess 20.

  The example of FIGS. 8 and 9 is a so-called Mt. Fuji-type lighting fixture having one to two sockets 3 to which one fluorescent lamp L is attached, and the reflecting plate 2 is formed in a trapezoidal cross section. ing.

  In this type of lighting fixture, a gap is formed between the fluorescent lamp L and the reflective plate 2 (that is, above the fluorescent lamp L) in order to pass the light reflected by the reflective plate 2 as shown by arrows in FIGS. Is provided.

  However, in the above lighting fixture, when the straight tube LED lamp 1 is used with the light emitting diode 11 facing downward instead of the fluorescent lamp L, no light is emitted to the upper side of the straight tube LED lamp 1. The above gap is wasted.

  This invention is made | formed in view of the said reason, The objective is to provide the lighting fixture which can be reduced in thickness.

  The luminaire of the present invention includes at least one light source having a cylindrical main body and bases respectively provided at both ends in the axial direction of the main body, and a reflector that reflects light from each of the light sources. A plurality of sockets each fixed to the reflecting plate and connected to the base of the light source, and light is emitted only at a predetermined angle around the axis on the outer peripheral surface of the main body of each light source. It is a light emitting part, and the remaining predetermined angle is a non-light emitting part that does not emit light, and the reflection plate has a retracting concave part in which the non-light emitting part is accommodated and the light emitting part protrudes for each light source. It is characterized by.

  In this luminaire, in the reflector, it is desirable that a heat radiating hole which is a through hole is provided on the bottom surface of the retracting recess.

  According to the present invention, it is possible to reduce the thickness as compared with the case where the retracting recess is not provided.

It is explanatory drawing which shows embodiment of this invention. It is a figure which shows the example of a change same as the above, (a) is a front view of a reflecting plate, (b) is a bottom view of a reflecting plate and a socket. It is explanatory drawing which shows another example of a change same as the above. It is a figure which shows the reflecting plate in another modified example same as the above, (a) is a front view of a reflecting plate, (b) is a bottom view of a reflecting plate and a socket. It is sectional drawing in the cross section orthogonal to an axis | shaft which shows the main-body part of a straight tube | pipe type LED lamp. It is a perspective view which shows an example of a lighting fixture. It is explanatory drawing which shows the lighting fixture of FIG. It is a perspective view which shows another example of a lighting fixture. It is explanatory drawing which shows the lighting fixture of FIG.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  Since the basic configuration of the present embodiment is common to the examples of FIGS. 6 and 7, description of common parts is omitted.

  In the present embodiment, as shown in FIG. 1, a retraction recess 21 in which the non-light emitting portion 15 of the straight tube LED lamp 1 as a light source is housed and the light emitting portion 14 protrudes is provided in the reflecting plate 2.

  Here, in order to suppress the light loss of the straight tube type LED lamp 1, it is desirable that the projecting dimension of the light emitting unit 14 from the retracting recess 21 is as large as possible. In the present embodiment, the opening surface of the retracting recess 21 and the mounting surface of the printed wiring board 13 (see FIG. 5) so that the entire non-light emitting portion 15 is accommodated in the retracting recess 21 and the entire light emitting portion 14 protrudes from the retracting recess 21. And the lower surface at 1).

  According to the said structure, compared with the case where the evacuation recessed part 21 is not provided like FIG. 7, thickness reduction (namely, reduction of the protrusion dimension from the ceiling surface to which the reflecting plate 2 is fixed) is possible.

  By the way, since the light emitting diode 11 is a heat-generating component, heat tends to be trapped in the retracting recess 21. Therefore, as shown in FIG. 2, a heat radiating hole 22, which is a through hole that allows air to enter and exit between the space above the reflecting plate 2 and the inside of the retracting recess 21, is provided on the bottom surface of the retracting recess 21. Is desirable. In the example of FIG. 2, a plurality of heat radiating holes 22 are provided in each retracting recess 21, and the mechanical strength is higher than that in a case where the same heat radiating effect is obtained with one large heat radiating hole 22. Has been improved.

  8 and 9 similarly, a retracting recess 21 for storing the non-light emitting portion 15 of the straight tube LED lamp 1 is provided as shown in FIG. 3, or as shown in FIG. A heat dissipation hole 22 can be provided on the bottom surface of the recess 21.

1 Straight tube LED lamp (light source)
2 Reflecting plate 3 Socket 14 Light emitting part 15 Non-light emitting part 21 Retraction concave part 22 Heat radiation hole

Claims (2)

At least one light source having a cylindrical main body and a base provided at each end of the main body in the axial direction;
A reflector that reflects the light from each of the light sources;
A plurality of sockets each fixed to the reflector and connected to the base of the light source;
Of the outer peripheral surface of the main body of each light source, the light emitting part emits light only at a predetermined angle around the axis, and the remaining predetermined angle is a non-light emitting part that does not emit light,
The said reflecting plate has the evacuation recessed part in which the said non-light-emitting part is accommodated and the said light-emitting part protrudes for every said light source, The lighting fixture characterized by the above-mentioned.   The lighting apparatus according to claim 1, wherein a heat radiating hole, which is a through hole, is provided on a bottom surface of the retracting recess in the reflecting plate.

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