JP5857261B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture.

  Conventionally, lighting devices that can be mounted on a ceiling have been provided (see, for example, Patent Document 1). This illuminating device includes a plurality of LED elements and a plurality of convex lenses that are respectively arranged in front of the LED elements and control light distribution of light emitted from the corresponding LED elements. In this illumination device, a desired illumination environment can be realized by controlling the light distribution of the light emitted from each LED element by the corresponding convex lens.

Japanese Patent No. 4453553 (paragraph [0031] and FIG. 6)

  In the illumination device shown in Patent Document 1 described above, since a plurality of LED elements are used, it is necessary to provide a convex lens in a form corresponding to each LED element, but a convex lens is individually attached to each LED element. In such a case, the number of assembling steps is increased and the cost is increased. Therefore, it is preferable that all the convex lenses are integrally provided as one optical lens. In this case, light from the LED element is also incident on the joint portion formed between the convex lenses, and is incident on the joint portion. Since the light is totally reflected, there is a problem that the light emission efficiency is lowered.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a luminaire with improved emission efficiency of light emitted from a light source.

  The luminaire of the present invention includes at least two light sources arranged at a predetermined interval, and an optical member arranged in front of the light sources to control light distribution from the light sources. The optical member has at least two lens portions provided in a form corresponding to each light source, and a connecting portion that connects adjacent lens portions, and emits light from the light source to the front side on the connecting portion. A light distribution control unit is provided.

  In this lighting fixture, it is preferable that the light distribution control unit is composed of at least a diffusion surface provided on the front side of the coupling unit.

  Moreover, in this lighting fixture, it is also preferable that the light distribution control unit is constituted by a convex portion provided at least on the front side of the connecting portion.

  Furthermore, in this lighting fixture, it is also preferable that the light distribution control unit is constituted by an inclined surface provided at least on the rear surface side of the coupling unit.

Moreover, in this lighting fixture, it is also preferable that the inclined surface is subjected to a surface treatment that increases the reflectance as compared with other portions of the optical member .

  There is an effect that it is possible to provide a lighting fixture with improved emission efficiency of light emitted from the light source.

(A)-(c) is a schematic diagram which shows the principal part of the lighting fixture of this embodiment. It is a disassembled perspective view which shows an example same as the above. (A) is the same external perspective view seen from the front side, (b) is the same external perspective view seen from the rear side. It is a principal part enlarged view same as the above.

  Embodiment of a lighting fixture is described based on drawing. The lighting fixture of this embodiment is, for example, a ceiling light, and is used to illuminate the entire room by being directly attached to the ceiling. In addition, although the following description demonstrates the case where this lighting fixture is a ceiling light, this lighting fixture is not limited to a ceiling light, Other lighting fixtures may be sufficient.

  FIG. 2 is an exploded perspective view illustrating an example of the lighting fixture A of the present embodiment. The lighting fixture A includes a fixture main body 1 formed in a disk shape and a power feeding unit 5 disposed at the center of the fixture main body 1. And the light emitting unit 2 arranged in an annular shape around the power feeding unit 5. The luminaire A is disposed in front of the light emitting unit 2, the optical member 3 that controls the light distribution of the light emitted from the light emitting unit 2, the front of the optical member 3, and the light distribution control by the optical member 3. And a diffusing member 4 for diffusing the light from the light emitting unit 2.

  The light emitting unit 2 includes a plurality of (four in FIG. 2) mounting substrates 21 that are curved in an arc shape, and a plurality of LEDs (light emitting diodes) 22 are provided on one surface (the upper surface in FIG. 2) of each mounting substrate 21. Are mounted in two rows in the width direction of the mounting substrate 21 and along the longitudinal direction of the mounting substrate 21. As shown in FIG. 2, these mounting boards 21 are arranged in an annular shape around a power feeding unit 5 arranged at the center of the instrument main body 1, and are attached to the instrument main body 1 using, for example, mounting screws (not shown). It is attached. Here, in the present embodiment, a light source is constituted by a plurality of LEDs 22.

  The power feeding unit 5 generates lighting power for lighting the plurality of LEDs 22 mounted on the mounting board 21, and supplies the generated lighting power to each mounting board 21 via an electric wire (not shown). Specifically, the power supply unit 5 converts an AC voltage supplied from an external power source (not shown) into a DC voltage having a desired voltage value (a voltage value necessary for lighting the LED 22), and converts the converted DC voltage. A voltage is supplied to each mounting substrate 21. In addition, this electric power feeding part 5 is attached to the instrument main body 1 using an attachment screw (not shown), for example.

  The diffusing member 4 is formed in a dome shape with one surface (the lower surface in FIG. 2) opened by milky white acrylic resin to which a light diffusing agent is added, for example, and is detachably attached to the instrument body 1 from the front of the optical member 3. .

  The optical member 3 is made of a light-transmitting material (for example, acrylic resin, polycarbonate resin, glass, etc.), and has a disc-shaped main body 31 having a circular opening 31a formed at the center. On one surface of the main body 31 (upper surface in FIG. 2), as shown in FIGS. 2 and 4, lens portions 32 and 33 that are convex forward (upper in FIG. 4) are provided in two rows concentrically. ing. Here, in the present embodiment, the lens unit 32 is provided in a form corresponding to the LED 22 mounted on the inner side (the power feeding unit 5 side) of each mounting substrate 21, and the outer side (the side opposite to the power feeding unit 5) of each mounting substrate 21. The lens portion 33 is provided in a form corresponding to the LED 22 mounted on the). In addition, a connecting portion 34 that connects the lens portions 32 and 33 is integrally provided between the lens portion 32 and the lens portion 33 in the radial direction of the instrument body 1 (left and right direction in FIG. 4). . Furthermore, storage concave portions 32a and 33a for arranging the corresponding LEDs 22 are provided on the rear surface side (the lower surface side in FIG. 4) of the lens portions 32 and 33, respectively. Hereinafter, the structure of the connection part 34 is demonstrated based on FIG.

  FIG. 1A is a schematic diagram showing an example of the connecting portion 34. In this example, a diffusion surface 34a is formed on the front surface (upper surface in FIG. 1A) of the connecting portion 34 by, for example, embossing or sandblasting. Yes. In this case, the light emitted from the LED 22 toward the front surface of the connecting portion 34 is diffused by the diffusion surface 34a and emitted forward without being totally reflected as shown in FIG.

  FIG. 1B is a schematic view showing another example of the connecting portion 34, and in this example, a plurality of convex portions 34 b are provided on the front surface of the connecting portion 34. In this case, of the light emitted from the LED 22, the light traveling toward the front surface of the connecting portion 34 is transmitted through the convex portion 34 b without being totally reflected as shown in FIG. The

  Further, FIG. 1C is a schematic view showing still another example of the connecting portion 34. In this example, a pair of inclined surfaces 34c that are inclined toward each other toward the front side are formed on the rear surface of the connecting portion 34. Is provided. Further, a projecting portion 34d that protrudes forward is provided at a portion corresponding to the pair of inclined surfaces 34c on the front surface of the connecting portion 34. In this case, the light emitted from the LED 22 toward the connecting portion 34 is reflected by the inclined surface 34c and emitted forward from the projecting portion 34d as shown in FIG. Here, in this embodiment, the light distribution control unit is configured by the diffusion surface 34a, the convex portion 34b, or the inclined surface 34c.

  Next, the assembly procedure of the lighting fixture A will be described. The operator attaches the power feeding unit 5 to the center of the instrument body 1 and attaches the mounting substrate 21 to one surface (the upper surface in FIG. 2) of the instrument body 1, and then between the power feeding unit 5 and each mounting substrate 21. Are electrically connected using an electric wire (not shown). After that, the operator attaches the optical member 3 to the fixture body 1 from the front so as to cover each mounting substrate 21, and then attaches the diffusion member 4 to the fixture body 1 from the front, thereby completing the assembly of the lighting fixture A. (See FIGS. 3A and 3B).

  And by attaching the hook connector 6 (refer FIG.3 (b)) integrally provided in the rear surface side of the electric power feeding part 5 to the hook ceiling (not shown) provided in the ceiling, the lighting fixture A of FIG. Construction is complete.

  Thus, according to the present embodiment, by providing the light distribution control unit (one of the diffusing surface 34a, the convex portion 34b, and the inclined surface 34c) in the connecting portion 34 that connects the lens portions 32 and 33, The light from the LED 22 radiated toward the connecting portion 34 can be emitted forward without being totally reflected by the front surface of the connecting portion 34. Therefore, the emission efficiency can be improved by the amount of light emitted forward from the connecting portion 34, and the luminance between the lens portions 32 and 33 can be increased. Further, when the convex portion 34b is provided on the front surface of the connecting portion 34 as shown in FIG. 1B, the surface loss is reduced compared to the case where the diffusion surface 34a is formed on the front surface of the connecting portion 34. Can do.

  Here, for example, aluminum or silver may be vapor-deposited on each inclined surface 34c to increase the reflectance of each inclined surface 34c. In this case, the amount of light reflected by the inclined surface 34c can be increased, so that the light emission efficiency can be further improved and the luminance between the lens portions 32 and 33 can be further increased.

  In the present embodiment, any one of the diffusing surface 34a, the convex portion 34b, and the inclined surface 34c is provided in the connecting portion 34 as the light distribution control unit. However, the diffusing surface 34a, the convex portion 34b, and the inclined surface 34c The surface 34c may be combined, and similarly the light emission efficiency can be improved and the luminance between the lens portions 32 and 33 can be increased. The light source is not limited to the LED, and may be an organic EL, for example. Furthermore, the arrangement of the LEDs 22 and the lens portions 32 and 33 is not limited to an annular shape, and may be, for example, a square annular shape or a linear shape.

3 Optical member 22 LED (light source)
32, 33 Lens part 34 Connection part 34a Diffusion surface (light distribution control part)
A lighting equipment

Claims (5)

At least two light sources arranged at a predetermined interval;
An optical member disposed in front of the light source to control light distribution from the light source;
The optical member has at least two lens portions provided in a shape corresponding to each of the light sources, and a connecting portion that connects the adjacent lens portions,
The light fixture characterized by the light distribution control part which radiate | emits the light from the said light source to the front side is provided in the said connection part.   The lighting device according to claim 1, wherein the light distribution control unit includes at least a diffusion surface provided on a front surface side of the connection unit.   The lighting device according to claim 1, wherein the light distribution control unit includes at least a convex portion provided on a front surface side of the connecting portion.   The said light distribution control part is comprised with the inclined surface provided in the rear surface side of the said connection part at least, The lighting fixture of any one of Claims 1-3 characterized by the above-mentioned. The lighting apparatus according to claim 4, wherein the inclined surface is subjected to a surface treatment that increases reflectance more than other portions of the optical member .

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