JP2016066420A - Lighting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent that a gap between a diffuser panel and a steel plate becomes wide.SOLUTION: A lighting apparatus possesses a substrate, a metal main body, a diffuser panel and fix means. A light emitting device is implemented to the component side of the substrate. The main body is provided on a contralateral plane with the component side of the substrate. The diffuser panel has a pair of support units supporting the parts of both ends of the width direction of the main body in the vertical direction, and supports the main body with a support unit with a state that the component side of the substrate facing to the vertical downward. The fix means is provided so that each both ends of the width direction of each support unit of the pair of support units and the main body are fixed by pressing force in the vertical direction.SELECTED DRAWING: Figure 4

Description

  Embodiments described herein relate generally to a lighting fixture.

  In recent years, lighting fixtures including power-saving light emitting elements such as LEDs (Light Emitting Diodes) have been used as lighting fixtures. A luminaire including such a light emitting element can obtain higher luminance or illuminance with less power consumption, for example, as compared with a conventional incandescent lamp.

  In addition, for example, there is a lighting device that is installed in a ceiling surface and has a long shape. In such a lighting fixture, for example, the steel plate is supported by sandwiching the steel plate supporting the substrate on which the light emitting element emitting light is mounted between the metal fitting and the diffusion plate.

  However, in such a lighting fixture, since the steel plate is supported by being sandwiched between the metal fitting and the diffusion plate, a horizontal force is applied to the diffusion plate, and in the portion of the diffusion plate where the steel plate is not supported by the metal fitting. In some cases, a gap having a certain size may be formed between the diffusion plate and the steel plate. If a gap of a certain size is generated, insects or the like may enter through the gap.

JP 2012-3993 A

  The problem to be solved by the present invention is to suppress an increase in the size of the gap between the diffusion plate and the steel plate.

  The lighting fixture of embodiment comprises a board | substrate, a metal main body, a diffusion plate, and a fixing means. A light emitting element is mounted on the mounting surface of the substrate. The main body is provided with a surface opposite to the mounting surface of the substrate. The diffusion plate has a pair of support portions that support both ends of the main body in the width direction in the vertical direction, and supports the main body with the support portions in a state where the mounting surface of the substrate faces vertically downward. The fixing means is provided so as to press and fix each supporting portion in the pair of supporting portions and both end portions at both ends in the width direction of the main body in the vertical direction.

  According to the lighting fixture of the embodiment, an effect of suppressing an increase in the size of the gap between the diffusion plate and the steel plate can be expected.

FIG. 1 is a perspective view showing an example of the appearance of a lighting fixture 100 according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line AA ′ in FIG. FIG. 3 is a diagram for explaining another example of a lighting fixture. FIG. 4 is a diagram for explaining another example of the lighting fixture.

  The lighting fixture of embodiment described below comprises a board | substrate, a metal main body, a diffusion plate, and a fixing means. A light emitting element is mounted on the mounting surface of the substrate. The main body is provided with a surface opposite to the mounting surface of the substrate. The diffusion plate has a pair of support portions that support both ends of the main body in the width direction in the vertical direction, and supports the main body with the support portions in a state where the mounting surface of the substrate faces vertically downward. The fixing means is provided so as to press and fix each supporting portion in the pair of supporting portions and both end portions at both ends in the width direction of the main body in the vertical direction.

  Further, in the lighting fixture according to the embodiment described below, the pair of support portions of the diffusion plate are provided to extend inward in the width direction so as to face each other, and the main body is placed on the pair of support portions. Both ends are supported.

Moreover, in the lighting fixture which concerns on embodiment described below, a diffusion plate is equipped with a pair of support part which extends in the width direction and supports the part of the both ends of the width direction of a steel plate in a perpendicular direction. And in the lighting fixture which concerns on embodiment described below, let the length of each width direction of a pair of support part be x, and from the end of one support part to the end of the other support part among a pair of support parts When the length in the width direction is L1, the length in the width direction of the steel sheet is L2, and the length in the width direction of the substrate is L3, the following expression (1) is satisfied.
(L1-L2) <x <((L2-L3) / 2) Formula (1)

  Further, in the luminaire according to the embodiment described below, the diffusion plate has a rising wall provided to stand in the vertical direction of the support portion, and the rising wall is a position where the main body is supported by the support portion. It is formed so as to be higher.

  Hereinafter, with reference to each drawing, the lighting fixture which concerns on each embodiment is demonstrated. In addition, the lighting fixture demonstrated by each following embodiment shows only an example, and does not limit this invention. In the drawings, the same parts are denoted by the same reference numerals, and redundant description is omitted.

(First embodiment)
With reference to FIG. 1, the lighting fixture of 1st Embodiment is demonstrated.

[Configuration of lighting apparatus 1]
FIG. 1 is a perspective view showing an example of the appearance of a lighting fixture 100 according to the first embodiment. In FIG. 1, the example which looked at the lighting fixture 100 from the diagonally downward direction is shown.

  As shown in FIG. 1, the luminaire 100 is a ceiling-mounted luminaire installed on a ceiling surface. The lighting fixture 100 includes a fixture body 1 and a light source unit 2. The instrument main body 1 has an inverted Fuji shape, is horizontally long, and has a long shape. The light source unit 2 is disposed in the instrument body 1.

  The instrument body 1 is formed by bending a galvanized steel sheet, and an accommodation recess (not shown) is formed at a substantially central portion along the longitudinal direction. A lighting device (not shown) is attached to the housing recess. The lighting device is connected to a commercial AC power source, and generates a DC output by receiving the commercial AC power source. The lighting device is connected to the light emitting element 22 via a substrate 23 to be described later, and supplies a direct current output to the light emitting element 22 to control the lighting of the light emitting element 22. A terminal block (not shown) is also attached to the housing recess. A power supply line, a feed line, and a dimming signal line are connected to the terminal block.

  FIG. 2 is a cross-sectional view taken along the line AA ′ in FIG. FIG. 2 shows a cross-sectional view of the light source unit 2. The light source unit 2 includes a steel plate 21, a substrate 23 on which a plurality of light emitting elements 22 are mounted on a mounting surface, and a diffusion plate 24. The steel plate 21 is also referred to as an attachment member. The diffusion plate 24 is also referred to as a cover member.

  Similar to the instrument main body 1, the steel plate 21 is horizontally long and formed in a long shape, and has a flat mounting surface 21a along the longitudinal direction. The steel plate 21 is made of a material having good thermal conductivity such as a galvanized steel plate or an aluminum plate. The steel plate 21 is an example of a metal main body.

  The substrate 23 is formed in a substantially rectangular shape. A plurality of substrates 23, for example, four substrates 23 are arranged in a straight line and attached to the attachment surface 21a of the steel plate 21 by screws or the like so that the back surfaces of the four substrates 23 are in close contact with the attachment surface 21a. It has been. A plurality of light emitting elements 22 are mounted on the surface side of the substrate 23. Here, the back surface of the substrate 23 is a surface opposite to the mounting surface of the substrate 23.

  The board | substrate 23 consists of a flat plate of the glass epoxy resin which is an insulating material, and the wiring pattern formed with the copper foil is given to the surface side. Further, a resist layer is appropriately applied. The material of the substrate 23 can be a ceramic material or a synthetic resin material when an insulating material is used. Further, when the material of the substrate 23 is made of metal, it is preferable to apply a material having good heat conductivity and excellent heat dissipation such as aluminum.

  The light emitting element 22 is an LED, which is a surface mount type LED package. Schematically, it is composed of an LED chip disposed in a main body made of ceramics, and a translucent resin for molding such as an epoxy resin or a silicone resin that seals the LED chip.

  The LED chip is a blue LED chip that emits blue light. In the translucent resin, a phosphor is mixed, and in order to be able to emit white light, a yellow phosphor that emits yellow light that is complementary to blue light is used. Yes.

  In addition, LED may be made to mount an LED chip directly on the board | substrate 23, and you may make it mount a bullet-type LED, and a mounting system and a format are not exceptionally limited.

  The diffusion plate 24 is made of a light-transmitting material such as acrylic or polycarbonate, and is formed in a long shape. Further, the diffusion plate 24 has a function of diffusing light emitted from the light emitting element 22 by being subjected to frost processing. Note that a diffusing material may be appropriately mixed in the diffusing plate 24 so as to have light diffusibility. In the present embodiment, the diffusion plate 24 is formed so as to bulge to the front side. As a result, the light emitted from the light emitting element 22 is diffused through the light transmissive diffusion plate 24 having diffusibility, and in particular, the light diffused in the bulging portion of the diffusion plate 24 is the luminaire 100. Since the ceiling surface is irradiated to the ceiling surface (ceiling surface) to which is attached, the brightness of the illumination can be increased.

  Moreover, as shown in the example of FIG. 2, the diffusion plate 24 has a pair of support parts 24a. The support portion 24a is integrally formed so as to extend in the horizontal direction Y from the diffusion plate 24. That is, the pair of support portions 24a are provided to extend inward in the width direction so as to face each other. Gravity in the vertical direction X is acting on the steel plate 21. Therefore, as shown in the example of FIG. 2, the support portion 24 a supports the portions at both ends in the width direction of the steel plate 21 in the vertical direction X with the mounting surface of the substrate 23 facing downward in the vertical direction X. That is, the steel plate 21 is placed on the pair of support portions 24a, and the both end portions in the width direction are indicated. Thereby, since the steel plate 21 can be supported without applying a horizontal force to the diffusion plate 24, the size of the gap between the diffusion plate 24 and the steel plate 21 does not increase. Therefore, an increase in the size of the gap between the diffusion plate 24 and the steel plate 21 can be suppressed.

In the present embodiment, the length in the horizontal direction (width direction) of each of the pair of support portions 24a is x, and the end of one support portion 24a to the end of the other support portion 24a of the pair of support portions 24a. When the length in the width direction up to L1 is set to L2, the length in the width direction of the steel plate 21 is set to L2, and the length in the width direction of the substrate 23 is set to L3, the light emission is performed so as to satisfy the following expression (2). A module 10 is configured.
(L1-L2) <x <((L2-L3) / 2) Formula (2)

  Therefore, since x is larger than (L1-L2), it is possible to prevent the steel plate 21 from falling from the support portion 24a. Moreover, since x is smaller than ((L2-L3) / 2), it can prevent that the board | substrate 23 and the support part 24a contact.

  Further, by setting (L1-L2) to a value larger than 0, when the steel plate 21 and the diffusion plate 24 are thermally expanded, due to the difference between the thermal expansion coefficient of the steel plate 21 and the thermal expansion coefficient of the diffusion plate 24, In the horizontal direction Y, the occurrence of a situation in which the steel plate 21 and the diffusion plate 24 come into contact with each other and force is applied to each other can be suppressed. As a result, the size of the gap between the steel plate 21 and the diffusion plate 24 is large. It can further be suppressed.

  In the present embodiment, the diffusing plate 24 has a rising wall 24c. The rising wall 24c is provided so as to stand in the vertical direction X with respect to each of the pair of support portions 24a. The rising wall 24c is formed to be higher than the position P where the steel plate 21 is supported by the support portion 24a.

  That is, in the present embodiment, the rising wall 24c is provided in a direction substantially orthogonal to the support portion 24a. Therefore, even if stress for fixing the support portion 24a in the vertical direction X occurs, the vicinity of the support portion 24a Large bending or distortion in the vertical direction X can be suppressed. This makes it difficult to form a gap between the steel plate 21 and the diffusion plate 24 even when a pressing force is applied to the support portion 24a in the vertical direction X.

  The lighting apparatus 100 of Embodiment 1 has been described above. As described above, according to the lighting apparatus 100 of the present embodiment, it is possible to further suppress an increase in the size of the gap between the steel plate 21 and the diffusion plate 24.

  As shown in FIG. 3, the diffusion plate 24 further includes a mating portion 24b, the steel plate 21 further includes a mounting portion 21b to which the torsion spring 50 is attached, and the torsion spring 50 is coupled to the mating portion 24b. And the steel plate 21 may be pressed against the diffusion plate 24 in the vertical direction X. That is, the torsion spring 50 presses each support portion 24a and each portion at both ends in the width direction of the steel plate 21 in the vertical direction. Therefore, since the steel plate 21 can be supported with a stronger force without applying a horizontal force to the diffusion plate 24, it is possible to further suppress an increase in the size of the gap between the diffusion plate 24 and the steel plate 21. Can do. The torsion spring 50 is an example of a fixing means provided so as to press each support portion 24a and each portion at both ends in the width direction of the steel plate 21 in the vertical direction.

  Further, as shown in FIG. 4, the screw 60 may further fix the steel plate 21 in the vertical direction X with respect to the diffusion plate 24. That is, the screw 60 fixes each support part 24a and each part of the both ends of the width direction of the steel plate 21 in a perpendicular direction. Thereby, it can further suppress that the magnitude | size of the clearance gap between the diffusion plate 24 and the steel plate 21 becomes large. The screw 60 is an example of a fixing means provided to fix each support portion 24a and each portion at both ends in the width direction of the steel plate 21 in the vertical direction.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be made to the above-described embodiment. In addition, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

21 Steel plate 22 Light emitting element 23 Substrate 24 Diffusion plate

Claims (4)

A substrate on which a light emitting element is mounted on a mounting surface;
A metal body provided with a surface opposite to the mounting surface of the substrate;
A diffusion plate that has a pair of support portions that vertically support both end portions in the width direction of the main body, and that supports the main body with the support portions in a state in which the mounting surface of the substrate faces vertically downward; ;
Fixing means provided so as to press and fix each supporting portion in the pair of supporting portions and both end portions at both ends in the width direction of the main body in the vertical direction;
The lighting fixture characterized by comprising.   The pair of support portions of the diffusion plate are provided to extend inward in the width direction so as to face each other, and both ends of the main body are supported so as to be placed on the pair of support portions. Item 1. A lighting apparatus according to item 1. The length in the width direction of each of the pair of support portions is x, and the length in the width direction from the end of one support portion to the end of the other support portion of the pair of support portions is L1, and the steel plate The lighting device according to claim 1, wherein the following formula (1) is satisfied when a length in the width direction of the substrate is L2 and a length in the width direction of the substrate is L3.
(L1-L2) <x <(L2-L3) / 2 Formula (1)   The diffusion plate has a rising wall provided so as to stand in the vertical direction of the support portion, and the rising wall is formed to be higher than a position at which the main body is supported by the support portion. The lighting fixture of any one of Claims 1-3 characterized by the above-mentioned.

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