JP2017224423A - Led lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lighting fixture in which, for example, a center part looks bright when the lighting fixture is installed on a ceiling and is looked up from right below, and which has little light loss.SOLUTION: An LED lighting fixture includes: a body; an LED substrate 11 on which a plurality of LEDs 111 are mounted; and a cover 12. The body, the LED substrate 11 and the cover 12 are arranged in this order. In the LED substrate 11, the surface opposing to the cover 12 is a mounting surface of the LEDs 111. The cover 12 includes an inner peripheral region 12a, an outer peripheral region 12c and an intermediate region 12b located between the inner peripheral region 12a and the outer peripheral region 12c, and it covers the mounting surface of the LED substrate 11. The cover 12 has a first thick wall part which is thicker than the thickness in the intermediate region 12b in the inner peripheral region 12a.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an LED lighting apparatus.

  In recent years, LED lighting fixtures using light-emitting diodes (LEDs) with low power consumption and long life are becoming popular instead of fluorescent lamps and the like. For example, an LED lighting apparatus in which a plurality of LEDs are arranged on a substrate on a circumference and covered with an annular cover has been proposed (see Patent Document 1). However, the LED lighting apparatus described in Patent Document 1 has a problem that, for example, the center portion looks dark when installed on the ceiling and looked up from directly below.

  As a solution to this problem, there has been proposed an LED lighting apparatus in which a plurality of LEDs are arranged concentrically and each LED is individually covered with a hemispherical cover (see Patent Document 2).

JP 2008-124008 A JP 2014-67529 A

  According to the LED lighting apparatus described in Patent Document 2, the center portion looks bright when viewed from directly below due to the lens effect provided by the cover. However, generally, in the structure of the cover in the LED lighting apparatus described in Patent Document 2, there is a problem that light is excessively diffused and loss is increased.

  Therefore, an object of the present invention is to provide an LED lighting apparatus that has a central portion that looks bright when installed on the ceiling and looks up from directly below, and has little light loss.

In order to achieve the above object, the LED lighting apparatus of the present invention comprises:
The body,
An LED substrate on which a plurality of LEDs are mounted;
Including a cover,
Arranged in the order of the main body, the LED substrate and the cover,
In the LED substrate, a surface facing the cover is a mounting surface of the LED,
The cover has an inner peripheral region, an outer peripheral region, and an intermediate region located between the inner peripheral region and the outer peripheral region, and covers the mounting surface of the LED substrate,
The cover has a first thick portion that is thicker than the intermediate region in the inner peripheral region.

  For example, when the LED lighting apparatus of the present invention is installed on the ceiling and looked up from directly below, the central portion looks bright and the loss of light is small.

FIG. 1 is an exploded perspective view showing an example of each component of the LED lighting apparatus of Embodiment 1. FIG. 2A and 2B are a cross-sectional view and a bottom view showing an example of an LED substrate and a cover in the LED lighting apparatus of Embodiment 1. FIG. 3A and 3B are a cross-sectional view and a bottom view showing an example of an LED substrate and a cover in the LED lighting apparatus of Embodiment 2. FIG.

  In the LED lighting apparatus of the present invention, the mounting surface of the LED substrate is mounted with the LEDs concentrically, and the first thick portion is located on the inner side of the LED mounted on the circumference closest to the center. It may be covered.

  In the LED lighting device of the present invention, the first thick part may have a surface-treated surface.

  In the LED lighting device of the present invention, the thickness of the first thick portion is, for example, in the range of 2 mm to 6 mm.

  In the LED lighting apparatus of the present invention, the thickness of the first thick portion is, for example, in the range of 1.2 times to 1.5 times the thickness of the intermediate region.

  The LED lighting fixture of this invention WHEREIN: The said cover may have a 2nd thick part thicker than the said intermediate | middle area | region further in the said outer peripheral area | region.

  In the LED lighting device of the present invention, the mounting surface of the LED substrate is mounted concentrically on the LED, and the second thick portion is outside the LED mounted on the circumference farthest from the center. It may be covered.

  In the LED lighting device of the present invention, the second thick part may have a surface-treated surface.

  In the LED lighting apparatus of the present invention, the thickness of the second thick portion is, for example, in the range of 2 mm to 6 mm.

  In the LED lighting device of the present invention, the thickness of the second thick portion is, for example, in the range of 1.2 times to 1.5 times the thickness of the intermediate region.

  Hereinafter, the LED lighting fixture of this invention is demonstrated in detail with reference to drawings. However, the present invention is not limited to the following description. In the following FIGS. 1 to 3, the same portions are denoted by the same reference numerals, and the description thereof may be omitted. In the drawings, for convenience of explanation, the structure of each part may be simplified as appropriate, and the dimensional ratio of each part may be schematically shown, unlike the actual case.

[Embodiment 1]
This embodiment is an example of the LED lighting fixture which has a thick part in the inner peripheral area | region of a cover. In FIG. 1, an example of a structure of the LED lighting fixture of this embodiment is shown. FIG. 1 is an exploded perspective view showing main components of the LED lighting apparatus. In the present embodiment, the LED lighting apparatus is circular, but is not limited thereto.

  The LED lighting fixture of this embodiment can be used as an LED ceiling light attached to a ceiling, for example. In this case, the LED lighting apparatus has, for example, an attachment portion, and the ceiling includes an indoor wiring apparatus such as a hooking ceiling body and an adapter electrically connected thereto. And the said LED lighting fixture is attached to the said adapter by the said attaching part, and is electrically connected with the said indoor wiring fixture. In the following description, unless otherwise specified, the LED lighting fixture is referred to as the upper surface side, and the opposite side (floor side) is referred to as the lower surface side, based on the state of being attached to the ceiling.

  As shown in FIG. 1, the LED lighting apparatus 1 includes a main body 10, a power supply board 14, a power supply cover 15, an LED board 11 on which a plurality of LEDs 111 are mounted, a cover 12, and a globe 13 are arranged in this order from the upper surface side. Has been. In the LED lighting device 1, the power supply substrate 14, the power supply cover 15, and the globe 13 are arbitrary constituent members and may or may not be included.

  The main body 10 is a member facing the ceiling, the upper surface is a surface facing the ceiling, and the lower surface is a surface on which the LED substrate 11 is disposed. The main body 10 has an opening 101 protruding to the lower surface side at the center, and a circumferential band-shaped recess 102 recessed from the center to the upper surface side around the opening. The former projecting opening 101 is provided with a mounting portion for the ceiling, and the latter circumferential belt-like recess 102 is provided with, for example, a power supply board 14 to be described later. The material of the main body 10 is not particularly limited, and examples thereof include metals such as steel.

  The upper surface of the main body 10 is an installation surface that faces an installation target (the ceiling) of the LED lighting apparatus 1. For example, a buffer member that contacts the installation target may be disposed on the installation surface. The buffer member is not particularly limited, and examples thereof include a sponge. According to such a form, when the LED lighting apparatus 1 is installed on the installation target, the buffer member exists between the LED lighting apparatus 1 and the installation target. The immobilization of 1 can be made more stable.

  The installation position of the buffer member is not particularly limited. For example, when the length from the center of the LED lighting device 1 to the outer periphery of the main body 10 is 1, the buffer member is arranged in the circumferential direction on the installation surface of the main body 10, and is 2 from the center. The range of / 5 to 1 is raised. The said buffer member may be arrange | positioned continuously in the circumferential direction, for example, and may be arrange | positioned discontinuously. Moreover, when the upper surface of the main body 10 is flat, it is preferable that the said buffer member is arrange | positioned on the outer peripheral side of the main body 10, for example, and it is inward from the point of appearance so that it cannot be seen from the outside.

  As described above, the power supply substrate 14 may be disposed in the circumferential band-shaped recess 102 of the main body 10. The upper surface of the power supply substrate 14 faces the main body 10, and a power supply module that drives light emission of the LEDs 111 is disposed on the lower surface of the power supply substrate 14. The power supply module is not particularly limited, and examples thereof include conventionally known circuit components. When the LED lighting apparatus 1 is electrically connected to a ceiling adapter, the power supply module on the power supply board 14 is connected to an AC power supply via the adapter. The power supply module can generate a DC power supply from the received AC current and supply it to each LED 111 of the LED substrate 11 to drive the light emission of the LED 111. The power supply module has a control power supply for power supply control, for example, and the voltage of the control power supply is 1.5V to 17V, for example. The control power supply may be, for example, one system or two systems, and examples include two systems of 5V and 14V.

  The power supply cover 15 has an upper surface facing the power supply substrate 14 and a lower surface facing the LED substrate 11. When the LED lighting apparatus 1 has the power supply cover 15, for example, the power supply cover 15 can divide the space in the main body 10 into two rooms. According to the power supply cover 15, for example, promotion of heat dissipation from the LED 111, interruption of heat dissipation generated by the power supply substrate 14, fixation of the LED substrate 11, etc. can be performed more efficiently. The material of the power supply cover 15 is not particularly limited, and examples thereof include metals such as aluminum and steel.

  When the LED substrate 11 has an upper surface facing the main body 10 and a power source cover 15, the LED substrate 11 is opposed to the power source cover 15, its lower surface is opposed to the cover 12, and the mounting surface on which the LED 111 is mounted. is there. When the LED lighting apparatus 1 is installed on the ceiling, the mounting surface of the LED 111 is the front side, and the lower side is irradiated.

  In the LED board 11, the mounting form of the plurality of LEDs 111 is not particularly limited. For example, the plurality of LEDs 111 are mounted on the circumference of the LED substrate 11. The number of circumferences is not particularly limited, and for example, preferably on a plurality of concentric circles. The mounting intervals of the LEDs 111 on the same circumference may be equal intervals or different intervals, for example. On adjacent circles, the LEDs 111 may be mounted on the same line from the center toward the outer periphery, or may be mounted so as to have a shifted positional relationship.

  In FIG. 1, the center of the LED substrate 11 has an opening, but may not have an opening. In FIG. 1, the shape of the LED substrate 11 is a regular octagon, but may be other shapes such as a circle. Further, in FIG. 1, the LED substrate 11 is a single plate, but may be an aggregate of a plurality of substrates. If LED board 11 is made into one board, the number of manufacturing processes, such as an assembly, can be reduced.

  The cover 12 has an upper surface facing the LED substrate 11 and a lower surface serving as an irradiation surface. Examples of the member of the cover 12 include a member having translucency and further diffusibility. Specific examples thereof include a translucent resin such as polycarbonate resin and acrylic resin.

  The cover 12 will be described in more detail with reference to FIGS. 2 (A) and 2 (B). 2A and 2B are a cross-sectional view and a bottom view showing an example of the LED substrate 11 and the cover 12 in the LED lighting apparatus 1 of the present embodiment. As shown in FIGS. 2A and 2B, the cover 12 has an inner peripheral region 12a, an outer peripheral region 12c, and an intermediate region 12b located between the inner peripheral region 12a and the outer peripheral region 12c. The mounting surface of the LED substrate 11 is covered.

  The cover 12 has a first thick portion that is thicker in the inner peripheral region 12a than in the intermediate region 12b. The LED lighting apparatus 1 according to the present embodiment, for example, has a bright central portion when installed on the ceiling and looked up from directly below due to the lens effect provided by the first thick portion. Moreover, the LED lighting fixture 1 of this embodiment arrange | positions several LED concentrically, and light is excessive like the LED lighting fixture of patent document 2 which covered each LED with the hemispherical cover separately. There is little loss. Moreover, according to the LED lighting fixture 1 of this embodiment, since there is little loss of light, for example, by adjusting the mounting number of LED111 appropriately, power consumption and heat_generation | fever than the LED lighting fixture of patent document 2 are demonstrated. The amount can be reduced. As shown in FIG. 2A, the first thick portion preferably has a shape that is gently inclined from the intermediate region 12b and bulges toward the center, but bulges so as to protrude downward. It may be a shape.

  The thickness of the first thick portion is not particularly limited, but is, for example, in the range of 2 mm to 6 mm. Further, the thickness of the first thick portion is, for example, in the range of 1.2 to 1.5 times the thickness of the intermediate region 12b.

  As shown in FIGS. 2A and 2B, the first thick portion may cover the inside of the LED 111 mounted on the circumference closest to the center. The first thick part preferably covers about half of the inside of the LED 111 mounted on the circumference closest to the center.

  The first thick part may have a surface that has been surface-treated. If the first thick portion has a surface that has been surface-treated, it is possible to suppress the occurrence of bright and dark illuminance unevenness and interference fringe patterns, which are problems in appearance when the globe 13 is provided. The surface treated surface may have only the outer surface of the first thick part, or may have only the inner surface of the first thick part, or the outer surface and the inner Both of the surfaces may have. Further, the surface-treated surface may be a part of the outer surface and the inner surface, or may be the whole. As an example of the surface treatment, the surface of the first thick portion may have a texture.

  The globe 13 has a dome shape that covers the main body 10, the power supply board 14, the power supply cover 15, the LED board 11, and the cover 12, and is made of, for example, translucent resin (including milky white, transparent, and translucent) such as acrylic resin. It is formed. In the globe 13, light diffusing particles, pigments and the like may be dispersed. Further, at least one of the outer surface and the inner surface of the globe 13 may be roughened by sandblasting or the like, or may have wrinkles. For example, the globe 13 may be the same as that used in conventionally known lighting fixtures.

[Embodiment 2]
The present embodiment is an example of an LED lighting apparatus having a thick portion in the outer peripheral region of the cover in addition to the inner peripheral region of the cover. The LED lighting apparatus of the present embodiment is the same as the LED lighting apparatus 1 of Embodiment 1 except that the outer peripheral area of the cover has a second thick part that is thicker than the intermediate area.

  3A and 3B are a cross-sectional view and a bottom view showing an example of the LED substrate 11 and the cover 12 in the LED lighting apparatus of the present embodiment.

  The cover 12 has a first thick portion thicker than the intermediate region 12b in the inner peripheral region 12a, and has a second thick portion thicker than the intermediate region 12b in the outer peripheral region 12c. According to the LED lighting fixture of this embodiment, in addition to the effect produced by the LED lighting fixture 1 of Embodiment 1, the brightness on the outer peripheral side can also be secured by the lens effect brought about by the second thick part. For this reason, according to the LED lighting fixture of this embodiment, the uniformity of the brightness when it is installed on the ceiling and looked up from directly below can be further improved, for example. As shown in FIG. 3 (A), the second thick portion preferably has a shape that is gently inclined from the intermediate region 12b and bulges outward, but bulges so as to protrude downward. It may be a shape.

  The thickness of the second thick portion is not particularly limited, but is, for example, in the range of 2 mm to 6 mm. Further, the thickness of the second thick portion is, for example, in the range of 1.2 to 1.5 times the thickness of the intermediate region 12b.

  As shown in FIGS. 3A and 3B, the second thick portion may cover the outside of the LED 111 mounted on the circumference farthest from the center. The second thick part preferably covers about half of the outside of the LED 111 mounted on the circumference farthest from the center.

  The second thick part may have a surface treated surface. If the second thick part has a surface that has been surface-treated, it is possible to suppress the occurrence of bright and dark illuminance unevenness and stripes due to interference, which are problems in appearance when the globe 13 is provided. The surface treated surface may have only the outer surface of the second thick part, or may have only the inner surface of the second thick part, or the outer surface and the inner Both of the surfaces may have. Further, the surface-treated surface may be a part of the outer surface and the inner surface, or may be the whole. As an example of the surface treatment, the surface of the second thick portion may have a texture.

  The present invention has been described above with reference to the embodiments. However, the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

  The LED lighting apparatus of the present invention has, for example, a bright central part and a small loss of light when installed on the ceiling and looked up from directly below. The LED lighting apparatus of the present invention can be used for a wide range of applications such as indoor ceiling lights.

DESCRIPTION OF SYMBOLS 1 LED lighting fixture 10 Main body 11 LED board 12 Cover 12a Inner periphery area | region 12b Middle area | region 12c Outer periphery area | region 13 Globe 14 Power supply board 15 Power supply cover 111 LED

Claims (10)

The body,
An LED substrate on which a plurality of LEDs are mounted;
Including a cover,
Arranged in the order of the main body, the LED substrate and the cover,
In the LED substrate, a surface facing the cover is a mounting surface of the LED,
The cover has an inner peripheral region, an outer peripheral region, and an intermediate region located between the inner peripheral region and the outer peripheral region, and covers the mounting surface of the LED substrate,
The LED lighting apparatus according to claim 1, wherein the cover has a first thick portion having a thickness larger than that of the intermediate region in the inner peripheral region. The LED is mounted on the mounting surface of the LED substrate concentrically,
The LED lighting apparatus according to claim 1, wherein the first thick part covers an inner side of the LED mounted on a circumference closest to the center. The LED lighting apparatus according to claim 1, wherein the first thick portion has a surface that has been surface-treated. 4. The LED lighting apparatus according to claim 1, wherein a thickness of the first thick part is in a range of 2 mm to 6 mm. 5. The LED lighting apparatus according to claim 1, wherein a thickness of the first thick portion is in a range of 1.2 to 1.5 times a thickness of the intermediate region. 6. The LED lighting apparatus according to claim 1, wherein the cover further includes a second thick portion having a thickness larger than that of the intermediate region in the outer peripheral region. The LED is mounted on the mounting surface of the LED substrate concentrically,
The LED lighting apparatus according to claim 6, wherein the second thick part covers an outside of the LED mounted on a circumference farthest from the center. The LED lighting fixture according to claim 6 or 7, wherein the second thick part has a surface that has been surface-treated. The LED lighting fixture according to any one of claims 6 to 8, wherein a thickness of the second thick part is in a range of 2 mm to 6 mm. 10. The LED lighting apparatus according to claim 6, wherein a thickness of the second thick part is in a range of 1.2 times to 1.5 times a thickness of the intermediate region.

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