JP5489346B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture installed on a ceiling surface or the like using an LED element as a light source.

  2. Description of the Related Art Conventionally, there has been known a lighting fixture in which an LED unit is housed in a fixture main body, and a power supply unit is disposed on the opposite side of the LED unit via a mounting base (see, for example, Patent Document 1).

JP 2008-293928 A (FIG. 1, paragraph number 0018)

In general, in a lighting fixture that houses a power supply unit in the fixture body, an insulating cover is used to insulate the power supply unit.
As shown in FIG. 4, such a conventional lighting fixture 100 is provided with an insulating cover 103 so as to cover the power supply unit 102 accommodated in the fixture main body 101, and the insulating cover 103 and the like. It is shut off so that no current flows between the electrical parts.
However, in such a conventional lighting fixture 100, when the power supply unit 102 generates heat, the insulating cover 103 covers the power supply unit 102, so that heat dissipation from the power supply unit 102 is warped. Therefore, the heat dissipation of the power supply unit 102 is not good.
On the other hand, the lighting fixture described in Patent Document 1 described above has a simple cylindrical shape covering the periphery of the power supply unit and has an open upper portion. However, it cannot be said that the heat dissipation to the side of the power supply unit is excellent, and the heat dissipation is not as good as the conventional lighting fixture 100 described above.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a lighting fixture capable of improving heat dissipation.

A lighting fixture according to the present invention includes a cylindrical fixture main body, an LED unit housed in the fixture main body, a power supply unit that supplies power to the LED unit, and transmits light from the LED unit. a cover covering the opening face having, in a bottomed cylindrical shape inside the instrument body includes an insulating cover that side height nonuniform, and the power supply unit is housed inside the insulating cover, substrate When the has a plurality of electronic components mounted on the substrate, and that the high temperature of the plurality of electronic components Ru is disposed closer to the side surface height lower wall of the insulating cover.

Lighting device according to the present invention, the insulating cover has on its side surface is higher wall height, having a claw for preventing escape of the substrate having the power supply unit.

  According to the lighting fixture of this invention, there exists an effect that a thermal radiation characteristic can be improved.

The vertical sectional view of the lighting fixture of one embodiment concerning the present invention FIG. 1 is an external perspective view of the insulating cover of the lighting apparatus shown in FIG. FIG. 2 is an external perspective view of the insulating cover shown in FIG. Longitudinal section of a conventional lighting fixture

Hereinafter, the lighting fixture which concerns on one Embodiment of this invention is demonstrated with reference to drawings.
As shown in FIG. 1, a lighting fixture 10 according to an embodiment of the present invention includes a fixture body 11, an LED unit 12, a power supply unit 13, a cover 14, an insulating cover 15, and a lens 16. Installed on the ceiling side (not shown).

  The instrument body 11 is formed in a substantially cylindrical shape using, for example, a hard resin material. The instrument body 11 has an opening 17 at the lower end, and has an internal thread 18 on the inner peripheral side of the opening 17. The instrument main body 11 has a partition plate part 19 for isolating the upper part and the lower part of the instrument main body 11 on the inner periphery thereof. The partition plate 19 has a bottom plate 20 at the bottom, an insulating cover accommodating portion 21 inside the upper portion, and an insulating cover positioning hole 22 at the center of the bottom plate 20. The partition plate portion 19 has an LED board mounting portion 23 at the center of the lower surface of the bottom plate 20, and a boss 25 having a screw hole 24 formed on the outer peripheral portion of the LED substrate mounting portion 23.

  The LED unit 12 has a plurality of LED elements 27 mounted on the lower surface of an LED substrate 26 formed in an annular shape. The LED board 26 is electrically connected to a power supply unit 13 with a printed circuit (not shown). In the LED unit 12, the LED substrate 26 is attached to the LED substrate attachment portion 23 on the lower surface of the bottom plate 20 of the partition plate portion 19. The LED unit 12 emits white light of a single white color or a combination of RGB by power supply from the power supply unit 13. Then, the flange 28 of the lens 16 is inserted into the boss 25 on the outer peripheral portion of the LED board mounting portion 23, and the screw 29 is screwed into the screw hole 24 of the boss 25 through the flange 28, whereby the lower surface of the partition plate portion 19. A lens 16 is attached to cover the LED unit 12.

  The power supply unit 13 includes a network circuit (see FIG. 3) 31, an AC-DC conversion circuit (see FIG. 3) 32, a smoothing circuit (see FIG. 3) 33, and the like mounted on a power supply unit substrate 30. The supplied commercial AC power source is converted into a DC power source for the LED element 27. Since the power supply unit 13 incorporates a transformer or the like that becomes an inductance in the network circuit 31, the power supply unit 13 generates heat during operation and becomes high temperature. The power supply unit substrate 30 has a positioning hole 34 on the outer peripheral portion.

  The cover 14 is made of, for example, a transparent or milky white resin, and is formed in a bottomed shape having the same outer diameter as that of the instrument body 11. The cover 14 has a male screw part 35 on the outer periphery of the upper end part, and the male screw part 35 is attached to the instrument main body 11 by being screwed into the female screw part 18 of the instrument main body 11.

  As shown in FIG. 2, the insulating cover 15 is formed in a substantially cylindrical shape with a bottom using, for example, an insulating resin material. The insulating cover 15 has a side plate 37 on the outer periphery of the bottom plate 36 at the bottom, and a convex portion positioned in the insulating cover positioning hole 22 of the bottom plate 20 of the instrument body 11 at the center of the bottom surface of the bottom plate 36 (see FIG. 1). 38. The side plate 37 has a power supply unit housing portion 39 on the inner peripheral portion, the first side plate portion 40 having the highest height dimension, the second side plate portion 41 having a lower height dimension than the first side plate portion 40, A third side plate portion 42 having a height dimension lower than that of the second side plate portion 41 is arranged in the circumferential direction. That is, the side plate 37 is formed of the first side plate portion 40, the second side plate portion 41, and the third side plate portion 42, which are not uniform in height. The insulating cover 15 can also be formed with heat-dissipating fins inside the side plate 37.

  The insulating cover 15 has a flexible locking piece 43 for preventing the power supply unit substrate 30 from coming off at a part of the first side plate portion 40 having the highest height. In the insulating cover 15, a tapered positioning projection 44 through which the positioning hole 34 of the power supply unit substrate 30 is inserted is formed on the bottom plate 36 near the flexible locking piece 43.

Next, a procedure for attaching the power supply unit 13 to the insulating cover 15 will be described.
As shown in FIG. 3, first, the power supply unit substrate 30 in which the network circuit 31 incorporating the transformer serving as the inductance, the AC-DC conversion circuit 32, the smoothing circuit 33 and the like are mounted is housed in the power supply unit of the insulating cover 15. It is inserted into the part 39. At this time, the positioning hole 34 of the power supply unit substrate 30 is extrapolated to the positioning protrusion 44 of the insulating cover 15, whereby the direction of the power supply unit substrate 30 is positioned in a predetermined direction of the insulating cover 15. As the process proceeds, the flexible locking piece 43 is elastically deformed. Then, as the power supply unit substrate 30 advances to a predetermined position, the flexible locking piece 43 is locked to the upper surface of the power supply unit substrate 30, so that the power supply unit substrate 30 is attached to the predetermined position of the insulating cover 15. It is done.

  In the power supply unit 13 attached to the insulating cover 15, the network circuit 31 including a transformer serving as an inductance is disposed corresponding to the third side plate portion 42 having the lowest height. As a result, the power supply unit 13 is provided with a large capacity heat radiation space above and to the side of the network circuit 31 that is at a high temperature. Next, the convex portion 38 of the insulating cover 15 to which the power supply unit 13 is attached is dropped into the insulating cover positioning hole 22 of the bottom plate 20 in the instrument main body 11 and positioned, whereby the insulating cover 15 is attached to the instrument main body 11. It is done. Instead of the network circuit 31, an AC-DC conversion circuit 32, a smoothing circuit 33, other electronic circuits, etc. that generate other heat are arranged corresponding to the third side plate portion 42 having the lowest height. You can also.

  In such a lighting fixture 10, the cover 14 is screwed into the fixture body 11 after the fixture body 11 is screwed to a ceiling construction surface (not shown). Then, the LED element 27 of the LED unit 12 emits light by the power supply from the power supply unit 13, and the light from the LED unit 12 passes through the lens 16 and the cover 14 and irradiates the lower floor side.

Therefore, in the lighting fixture 10 of this embodiment, in the insulating cover 15, the inner peripheral side of the side plate 37 in which the height dimensions of the first side plate portion 40, the second side plate portion 41, and the third side plate portion 42 are not uniform. The power supply unit 13 is housed in the power supply unit housing portion 39.
Thereby, in the lighting fixture 10 of this one Embodiment, in addition to the upper direction of the power supply unit 13, the space for the heat dissipation to the side is ensured, and heat dissipation can be improved.

Moreover, in the lighting fixture 10 of this embodiment, the insulating cover 15 has a flexible locking piece 43 for preventing the power supply unit board 30 from coming off at a part of the first side plate portion 40 having the highest height dimension. .
Thereby, in the lighting fixture 10 of this one embodiment, the flexible locking piece 43 is locked to the upper surface of the power supply unit substrate 30 as the power supply unit substrate 30 advances to a predetermined position with respect to the insulating cover 15. Thus, since the power supply unit substrate 30 is attached to the insulating cover 15, simple attachment can be performed without screwing with screws. In addition, since the flexible locking piece 43 is formed in a part of the first side plate portion 40 having the highest height dimension, the flexible stroke of the flexible locking piece 43 is increased, and the power supply unit board 30. Can be securely locked.

Furthermore, in the lighting fixture 10 of this embodiment, the network circuit 31 that has a built-in transformer and becomes high temperature during operation is connected to the third side plate portion 42 having the lowest height in the insulating cover 15. Correspondingly arranged.
Thereby, in the lighting fixture 10 of this one embodiment, in the power supply unit 13, since a large capacity heat radiation space is formed above and to the side of the network circuit 31 that becomes high temperature during operation, the power supply unit 13 Is efficiently dissipated.

  In addition, the instrument main body 11, the LED unit 12, the power supply unit 13, the cover 14, the lens 16 and the like used in one embodiment are not limited to those illustrated, and can be appropriately changed.

DESCRIPTION OF SYMBOLS 10 Lighting fixture 11 Appliance main body 12 LED unit 13 Power supply unit 14 Cover 15 Insulation cover 31 Network circuit (electronic component)
32 AC-DC conversion circuit (electronic parts)
33 Smoothing circuit (electronic parts)
43 Flexible locking piece (claw)

Claims (2)

A tubular instrument body;
An LED unit housed in the instrument body;
A power supply unit for supplying power to the LED unit;
A cover that transmits light from the LED unit and covers an opening surface of the instrument body;
The inside of the instrument body in a bottomed cylindrical shape, provided with an insulating cover of the side height nonuniform, and
The power supply unit is housed inside the insulating cover, includes a substrate, and a plurality of electronic components mounted on the substrate, and one of the plurality of electronic components that has a high temperature is the insulating cover. luminaire side height Ru is positioned closer to the lower wall. The lighting fixture according to claim 1,
The said insulating cover is a lighting fixture which has a nail | claw for the removal of the said board | substrate which has in the said power supply unit in the wall side with the high side surface height.

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