JP4479497B2 - lighting equipment - Google Patents

Description

  The present invention relates to a luminaire using, for example, a light emitting diode as a light source.

  As lighting fixtures that use light-emitting diodes (hereinafter referred to as “LEDs”) as light sources, products utilizing the long life of LEDs have been developed and commercialized. Although the said lighting fixture is equipped with the LED unit containing LED and the lighting unit inside a main body, with the recent high power, the emitted-heat amount from a LED unit and a lighting unit increases, and a heat countermeasure is a problem. It has become. In particular, the increase in the amount of heat generated from the LED is significant.

  As a countermeasure against the heat, the lighting fixture of Conventional Example 1 uses, for example, a dedicated main body formed in a shape with a high heat dissipation effect, provides heat dissipation fins, or fills the main body with resin. The heat is dissipated.

Moreover, as a lighting fixture of Conventional Example 2, Patent Document 1 discloses that an electronic component that drives an LED is disposed along the peripheral edge of the printed circuit board, thereby reducing the amount of heat accumulated in the central part of the printed circuit board. In addition, there is disclosed a lighting fixture that conducts heat generated from an electronic component from a side surface of a printed circuit board to an upper cover and radiates heat from the upper cover and the lower cover.
JP 2002-343130 A (pages 3 and 4 and FIG. 1)

  However, the lighting fixture of the above-described conventional example 1 becomes large by using a dedicated main body formed in a shape with a high heat dissipation effect, providing heat dissipation fins, or filling resin inside the main body. There was a problem.

  Moreover, the lighting fixture of Conventional Example 2 has a problem that heat generated from the LEDs arranged near the center cannot be sufficiently dissipated.

  This invention is made | formed in view of said point, The place made into the objective is to provide the lighting fixture which can make heat dissipation high, without making it large.

The invention according to claim 1 is a lighting fixture that is used by being attached to a mounting place such as a ceiling plate or a wall, and is formed in a circular shape with an LED unit having an LED as a light source, and a male screw portion is a circumferential side portion. A mounting plate for installing the LED unit, and a female threaded portion that is formed in a cylindrical shape and is screwed into the male threaded portion, is provided on the inner peripheral wall, and the mounting plate is inserted into the interior from one end and stored therein. A cover through which heat is conducted from the LED unit through a plate, a main body provided separately from the cover and fixed to the mounting location, and a mounting bracket attached to the main body and supporting the mounting plate And a gap is formed between the cover and the mounting location .

  In this configuration, since heat generated from the LED unit can be conducted to the mounting plate and the cover, heat dissipation can be increased without increasing the size.

  According to a second aspect of the invention, in the first aspect of the invention, a lighting unit that performs lighting control of the LED is provided, and a plurality of terminals are provided to electrically relay the lighting unit and the power source. A power terminal block is provided, wherein the mounting plate has the LED unit installed on one surface and the lighting unit and the power terminal block installed on the other surface. In this configuration, since the LED unit, the lighting unit, and the power terminal block are installed on the mounting plate, heat generated from the LED unit and the lighting unit can be conducted to the mounting plate, and the wiring work can be easily performed. it can.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the female thread portion is provided separately from one end and the other end of the inner peripheral wall. In this configuration, since heat conducted from the mounting plate to the cover can be conducted toward both ends of the cover, heat dissipation can be further increased.

Invention according to claim 4, provided in the invention described in claim 1, wherein the cover, in the inner peripheral wall, a step between the internal thread portion and the other end, the step And an elastic body sandwiched between at least one of the stepped surface erected on the boundary and the female screw portion and the male screw portion. In this configuration, the elastic force of the elastic body can strengthen the close contact between the female screw portion and the male screw portion, so that the screwing between the female screw portion and the male screw portion can be prevented from being loosened, and the cover and the attachment can be attached. The heat conduction with the plate can be further improved, and the heat dissipation can be further increased.
The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the LED unit includes the LED and a substrate on which the LED is mounted. It is installed on the mounting plate so as to face the mounting plate.

  According to the present invention, heat dissipation can be increased without increasing the size.

  First, the basic configuration of the present embodiment will be described with reference to FIGS. The lighting fixture of this embodiment is a direct mounting fixture for a round shape that uses an LED as a light source, is formed into a columnar shape having an outer diameter of 120 mm and a height of 93 mm, and is attached to a ceiling board, a wall, or the like. ), A main body 1, a mounting bracket 2, an electrical component unit 3, and a cover 4 are provided.

  The main body 1 includes, for example, a bottom portion 10 formed in a circular shape by insulating resin molding, a cylindrical portion 11 extending downward from the periphery of the bottom portion 10, and a projecting outward from the lower end of the cylindrical portion 11. It is provided with the collar part 12 currently made. As shown in FIG. 1B, the bottom portion 10 includes a plurality of (two in this embodiment) mounting holes 100, 101, a power supply hole 102, and a plurality (four in this embodiment) of protrusions 103, 103, 103, 103 are provided. Each of the mounting holes 100 and 101 is, for example, a long hole of 2-4.5 × 10 mm, and is fitted to a mounting screw (not shown), so that the surface or wall surface of the ceiling board A (see FIG. 1A). For fixing the main body 1 with screws.

  As shown in FIG. 1A, the mounting bracket 2 includes a bottom portion 20 that is formed in a circular shape, a cylindrical portion 21 that extends downward from the periphery of the bottom portion 20, and an outer side from the lower end of the cylindrical portion 21. And a flange 22 projecting from the head. The bottom portion 20 is formed to have a plurality of (four in this embodiment) fitting holes 200 and 200 (only two are shown in FIG. 1A), for example, a diameter of 32 mm, and a bushing 23 around the periphery. A power supply hole 201 is provided. Each fitting hole 200 is for fitting to each protrusion 103 and fixing the mounting bracket 2 to the main body 1. An electric wire (not shown) electrically connected to a power source (not shown) enters the interior of the mounting bracket 2 from the ceiling plate A through the power hole 201. The flange portion 22 is provided with two mounting holes 24 and 24.

  As shown in FIG. 2, the electrical component unit 3 includes a lighting unit 5, a power supply terminal block 6, an LED unit 7, and a mounting plate 8.

  The lighting unit 5 performs lighting control of an LED 71 (see FIG. 3) to be described later based on electric power from a power source (not shown). Further, the lighting unit 5 is provided with a mounting hole 50.

  The power supply terminal block 6 is provided with a plurality of (two pairs in this embodiment) terminals 60, 60, 60, 60 and protrusions 61, 61, 62, 62. Among the plurality of terminals 60, 60, 60, 60, some are terminals for electrical connection with the lighting unit 5, and the remaining are terminals for electrical connection with a power source (not shown). It is. Thereby, the power supply terminal block 6 electrically relays the lighting unit 5 and the power supply.

  As shown in FIG. 3, the LED unit 7 includes an LED substrate 70, a plurality of LEDs 71 and 71 that are light sources, a heat conductive sheet 72, and a lens 73, packings 74 and 74, and spacers 75 and 75. And mounting screws 76, 76. The LED substrate 70 is, for example, a printed circuit board or the like, and is provided with a fitting hole (not shown) penetrating from one surface 70a to the other surface 70b. In addition, LEDs 71 and 71 are mounted on one surface 70 a of the LED substrate 70.

  The heat conductive sheet 72 is a silicon rubber product having excellent heat conductivity (for example, a cercon sheet manufactured by Fuji Polymer Industries Co., Ltd.). The thermal conductivity of the thermal conductive sheet 72 is preferably 25 cal / (cm · sec · ° C.) or more, and more preferably 28.6 to 69.2 cal / (cm · sec · ° C.). When the LED unit 7 is installed on the mounting plate 8, the heat conductive sheet 72 has a wide area on the other surface 70b of the LED substrate 70 and one surface 8a (see FIG. 1A) of the mounting plate 8 described later. Closely. Thereby, the heat generated from the LED 71 is easily conducted to the mounting plate 8, so that the heat radiation can be increased.

  The lens 73 protrudes outward from a bottom portion 730 formed in a circular shape by, for example, insulating resin molding, a cylindrical portion 731 extending upward from the bottom portion 730, and a part of the upper end of the cylindrical portion 731. The protrusion 732 is provided integrally. Further, the lens 73 is provided with a cavity 73a surrounded by the bottom portion 730 and the cylindrical portion 731 and a notch for electrically connecting the LED substrate 70 and the lighting unit 5 (see FIG. 1A) (see FIG. 1). Not shown). The bottom portion 730 is provided with projecting portions 733, 733, and 733 that are formed in a circular shape, and a plurality of bosses (not shown). Each protrusion 733 has a recess 734 at the apex corresponding to the installation location of the LED 71. Each boss is for fitting in a fitting hole (not shown) of the LED board 70 and fixing the LED board 70 with the cavity 73a. The protrusion 732 is provided with a mounting hole 735.

  As shown in FIG. 1A, the mounting plate 8 is formed in a disk shape from a metal having a high thermal conductivity such as aluminum, and has higher heat dissipation than the lighting unit 5 and the LED unit 7. have. In addition, the mounting plate 8 is provided with a male screw portion 80 in which a thread groove is formed on the peripheral side portion, and mounting holes 81 and 81 penetrating from one surface 8a to the other surface 8b are provided on the peripheral portion side. . Each mounting screw 82 is for fitting in the mounting hole 81 and the retaining washer 83 and screwing (screwing) into the mounting hole 24 to fix the mounting plate 8 to the mounting bracket 2 with screws. . Thereby, the heat conducted to the mounting plate 8 can also be conducted to the main body 1 via the mounting bracket 2 and radiated to the outside, so that the heat radiation can be increased. The shape of the mounting plate 8 is not limited to a disk shape, and may be a circular shape such as a columnar shape or a disk shape having an H-shaped cross section.

  As shown in FIG. 2, the mounting plate 8 has the LED unit 7 installed on one surface 8a. Specifically, first, the LED substrate 70 (see FIG. 3) on which the LEDs 71 (see FIG. 3) are mounted is installed inside the lens 73. Subsequently, each mounting screw 76 is inserted into the mounting hole 735, the packing 74 and the spacer 75, and is screwed to the mounting hole (not shown) for the LED unit of the mounting plate 8, so that the lens 73 is attached to the heat conductive sheet 72. At the same time, it is fixed to one surface 8a of the mounting plate 8 with screws. The mounting plate 8 has the lighting unit 5 and the power supply terminal block 6 installed on the other surface 8b. Specifically, the mounting screw 51 is inserted into the mounting hole 50 and screwed into a mounting hole (not shown) for the lighting unit of the mounting plate 8, so that the lighting unit 5 is attached to the other surface 8 b of the mounting plate 8. Secure with screws. Furthermore, the mounting holes 84, 84, 85, 85 are fitted into the protrusions 61, 61, 62, 62 to fix the power terminal block 6 to the other surface 8 b of the mounting plate 8.

  The mounting plate 8 is provided with a notch (not shown) of the lens 73 and a wiring hole (not shown) for electrically connecting the lighting unit 5 and the LED unit 7. Thereby, the connection work between the units in the main body 1 having a small space and the power supply (not shown) is not required, and the connection can be easily performed.

  When a failure or the like occurs, each unit or the entire electrical component unit 3 can be exchanged, so that work efficiency can be improved. Other parts are reused as they are. Further, by installing the lighting unit 5 not on the main body 1 (see FIG. 1A) but on the mounting plate 8, it is provided on the same surface as the mounting holes 100 and 101 and the power supply hole 102 (see FIG. 1A). Therefore, the size can be reduced, and the degree of freedom in design can be increased.

  As shown in FIG. 1A, the cover 4 is formed in a cylindrical shape from a metal having high thermal conductivity such as aluminum, and the mounting plate 8 is inserted into the inside from the upper end (one end) and stored. It has higher heat dissipation than the lighting unit 5 and the LED unit 7. The cover 4 is provided with a ridge 40 on the lower end (other end) side of the inner peripheral wall 4a, and a female screw part 41 in which a thread groove is formed at a central portion separated from the upper end and the lower end of the inner peripheral wall 4a. ing. The female screw portion 41 is for attaching the cover 4 to the mounting plate 8 by rotating the cover 4 so as to be screwed to the male screw portion 80 of the mounting plate 8. Thereby, the cover 4 is supported by the mounting plate 8. Further, the cover 4 can be attached more stably than the case where the cover 4 is fitted and attached to the main body 1 made of resin. In addition, in the said cover 4, if the shape of the internal thread part 41 is common, what differs in various external appearance designs can be developed, and it can replace | exchange suitably according to a user's liking etc.

  Further, the cover 4 is provided with a step 42 on the inner peripheral wall 4a between the female screw portion 41 and the protruding portion 40 (the other end), and the packing 9 is provided on the step surface 42a standing in an annular shape at the boundary of the step 42. It has. The packing 9 is an O-ring formed in an annular shape by an elastic body such as rubber, for example. When the cover 4 is attached to the attachment plate 8, at least one of the step surface 42 a, the female screw portion 41, and the male screw portion 80. It is sandwiched between one and the other. Due to the elastic force of the packing 9, the close contact between the female screw portion 41 and the male screw portion 80 can be strengthened.

  Next, the attachment procedure to the ceiling board A of the lighting fixture of this embodiment is demonstrated. First, the main body 1 is fixed to the surface of the ceiling board A by screwing and fixing the main body 1 at the positions of the respective mounting holes 100 and 101 (see FIG. 1B). Subsequently, the fitting 103 is attached to the main body 1 by fitting the protrusion 103 into each fitting hole 200. Further, the lighting unit 5, the power supply terminal block 6, and the LED unit 7 are attached to the mounting plate 8. Next, each mounting screw 82 is inserted into the mounting hole 81 and the retaining washer 83 and screwed into the mounting hole 24 to fix the mounting plate 8 to the mounting bracket 2 with screws. Finally, the packing 9 is provided on the stepped surface 42 a of the cover 4, the female screw portion 41 is screwed to the male screw portion 80, and the cover 4 is attached to the mounting plate 8.

  The flow of heat generated from the LED unit 7 including the LED 71 (see FIG. 3) and the lighting unit 5 in the lighting fixture will be described. Heat generated from the LED unit 7 and the lighting unit 5 is conducted to the mounting plate 8. The heat conducted to the mounting plate 8 is conducted to the cover 4 through the female screw portion 41 and the packing 9. The cover 4 performs heat dissipation. Thereby, the said lighting fixture can make heat dissipation high.

  As described above, according to the present embodiment, the heat generated from the LED unit 7 can be conducted to the mounting plate 8, and the heat conducted to the mounting plate 8 can be conducted toward both ends of the cover 4. Heat dissipation of the heat generated from the LED unit 7 can be increased without increasing the size. In addition, since the close contact between the female screw portion 41 and the male screw portion 80 can be strengthened by the elastic force of the packing 9, it is possible to prevent the screwing between the female screw portion 41 and the male screw portion 80 from being loosened, and to cover the cover. The heat conduction between 4 and the mounting plate 8 can be improved. Furthermore, since the LED unit 7, the lighting unit 5 and the power terminal block 6 are installed on the mounting plate 8, heat generated from the lighting unit 5 can be conducted to the mounting plate 8 and the wiring work can be easily performed. Can do.

  As a modification of the present embodiment, the cover may include elastic bodies such as rubber and springs at a plurality of positions on the step surface. For example, a plurality of rubbers may be provided on the stepped surface separately from each other. Further, the plurality of springs may be separated from each other so that one end is in contact with at least one of the female screw portion and the male screw portion and the other end is in contact with the step surface. Even in such a configuration, the close contact between the female screw portion and the male screw portion can be strengthened by the elastic force of the elastic body, so that the screwing between the female screw portion and the male screw portion can be prevented from loosening. The heat conduction between the cover and the mounting plate can be improved.

It is the lighting fixture of embodiment by this invention, Comprising: (a) is an internal side view, (b) is a top view. It is a side view of the electrical component unit in the same lighting fixture. It is a side view of the LED unit in a lighting fixture same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Mounting bracket 4 Cover 4a Inner peripheral wall 41 Female thread part 5 Lighting unit 7 LED unit 8 Mounting plate 80 Male thread part

Claims (5)

It is a lighting fixture that is used by being attached to an installation place such as a ceiling board or a wall,
An LED unit having an LED as a light source;
A circular plate, a male screw part is provided on the peripheral side, and a mounting plate for installing the LED unit;
A female threaded portion that is formed in a cylindrical shape and is screwed into the male threaded portion is provided on the inner peripheral wall, the mounting plate is inserted and stored inside from one end, and heat is conducted from the LED unit through the mounting plate. A cover ,
A body provided separately from the cover and fixed to the mounting location;
A mounting bracket attached to the main body and supporting the mounting plate ;
The cover is formed with a gap between the mounting location and the lighting fixture. With a lighting unit that performs lighting control of the LED,
Provided with a plurality of terminals, comprising a terminal block for power supply that electrically relays the lighting unit and the power supply,
The lighting device according to claim 1, wherein the mounting plate has the LED unit installed on one surface and the lighting unit and the power terminal block on the other surface.   The lighting apparatus according to claim 1, wherein the female screw portion is provided apart from one end and the other end of the inner peripheral wall. The cover is provided with a step between the female screw portion and the other end on the inner peripheral wall,
The elastic body clamped by the level | step difference surface standingly arranged in the boundary of the said level | step difference and at least one of the said internal thread part and the said external thread part is provided. The any one of Claims 1-3 characterized by the above-mentioned. lighting equipment. The LED unit includes the LED and a substrate on which the LED is mounted, and is installed on the mounting plate so that the substrate and the mounting plate face each other. The lighting fixture of any one of 4.

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