JP5072131B2 - Power supply and lighting fixture - Google Patents

Description

  The present invention relates to a power supply device and a lighting fixture applied to a downlight embedded in a ceiling construction surface using, for example, an LED as a light source.

  2. Description of the Related Art Conventionally, there has been known a lighting fixture in which a power supply device is attached to an outer bottom surface of a fixture main body so as to be positioned in an outer region of the fixture main body via an arm portion (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2008-159455 (FIG. 1, paragraph number 0023)

The downlight lighting fixture embedded in the ceiling construction surface is desired to be downsized so that it is not necessary to enlarge the mounting hole formed in the ceiling construction surface. Moreover, since such a lighting fixture is used in the sealed space in the ceiling construction surface, high heat dissipation characteristics are required.
However, although the lighting fixture of Patent Document 1 can improve the heat dissipation of the power supply device because the arm portion is coupled to the heat radiating fin, the power supply device is arranged so as to protrude greatly outside the fixture body. For this reason, the overall outer shape becomes large.
On the other hand, there has been proposed a lighting fixture in which a power supply device is attached to the upper surface of a fixture main body having a heat radiation fin so as to fit in the fixture main body.
However, in such a conventional lighting fixture, since the power supply device is mounted on the upper surface of the fixture main body so as to be accommodated in the fixture main body, the degree of freedom in disposing the radiating fins on the fixture main body is reduced and high heat dissipation characteristics Difficult to get.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a power supply device and a lighting fixture that can be downsized and have high heat dissipation characteristics.

Lighting device according to the present invention includes an instrument body, an LED light emitting unit having a plurality of circuit boards which the LED chip is mounted, a frame attached to the instrument body, and a power unit attached to the tool body A lighting fixture attached to a mounting hole provided on a ceiling construction surface, wherein the fixture main body has a heat radiating portion and a power supply mounting portion, and the LED light emitting portion is accommodated in the fixture main body, The heat dissipating part protrudes toward the axial direction of the instrument body in a partial region of the upper surface of the instrument body, and the power supply device mounting part has a plane perpendicular to the axial direction of the instrument body, The height from the plane to the upper end of the heat dissipating part is substantially equal to the height of the power supply device, and is formed in the region of the other part of the upper surface of the instrument body. Plate, side plate and bottom plate Has, together with a built-in electrical components for converting external commercial power source to a DC power source for the LED light emitting portion is electrically connected to the circuit board, part of the power supply the instrument pop out of the body, popping was the outer faces to the heat radiating portion is opposite, and the bottom plate are assembled such that contact with the plane of the power supply device mounting portion, to the outer side plates jumped, external wherein the power supply terminal block for electrically connecting the commercial power supply and the power supply is installed.

  According to the power supply device and the lighting fixture of the present invention, it is possible to achieve downsizing and to obtain high heat dissipation characteristics.

The external appearance perspective view seen from diagonally upward of the power supply device and lighting fixture of 1st Embodiment which concerns on this invention FIG. 1 is an external perspective view of a fixture body in the lighting fixture of FIG. The side view of the power supply device and lighting fixture of 2nd Embodiment which concerns on this invention FIG. 3 is an external perspective view of the fixture body in the lighting fixture of FIG. External perspective view of a power supply device and a lighting fixture according to a third embodiment of the present invention as viewed obliquely from above FIG. 5 is an external perspective view of the power supply device in the lighting apparatus of FIG.

Hereinafter, a power supply device and a lighting fixture according to a plurality of embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, a lighting fixture 10 according to a first embodiment of the present invention includes a fixture main body 11, an LED light emitting unit (not shown) that is a light source accommodated in the fixture main body 11, a frame 12, and a power source. This is a downlight that is embedded in a mounting hole (not shown) provided on the ceiling construction surface (not shown).

  The instrument body 11 is formed in a cylindrical shape having a top plate 14 and a peripheral plate 15 using a hard resin material having insulation properties. In the instrument main body 11, a plurality of heat radiating fins 16 are formed on the top surface of the top plate 14 so as to protrude upward. The radiating fins 16 correspond to substantially half the area of the top plate 14, and the first radiating fin portions 17 projecting toward the upper end portion in the axial direction of the instrument main body 11 and the rest of the top plate 14. And a second radiating fin portion 18 projecting to the upper end portion in the axial direction of the instrument body 11. A power supply device mounting portion 19 having a plane orthogonal to the axial direction of the instrument body 11 is formed on the upper end surface of the first radiating fin portion 17. The 2nd radiation fin part 18 has the cut part 20 cut off in the shape of an inclination near the upper end part.

  The LED light emitting unit is attached to the lower surface of the top plate 14 of the instrument body 11 so as to be surrounded by the peripheral plate 15, and a plurality of LED chips (not shown) are mounted on a circuit board (not shown). The LED chip is arranged with the main optical axis facing downward. The frame 12 is formed in a cylindrical shape having the same outer diameter as that of the instrument body 11 using the same material as that of the instrument body 11. The frame 12 is assembled integrally with the instrument body 11 by screwing screws 21 from the top plate 14 of the instrument body 11. A reflection plate may be provided on the inner peripheral portion of the frame 12. A plurality of metal attachment springs 22 are attached to the outer periphery of the frame 12. The attachment spring 22 is elastically deformed in the axial direction of the appliance body 11 when the appliance body 11 is inserted into the attachment hole of the ceiling construction surface. The attachment spring 22 is elastically restored in the horizontal direction after the appliance body 11 is inserted into the attachment hole and is locked to the upper surface of the ceiling construction surface, thereby supporting the appliance body 11 on the ceiling construction surface.

  The power supply device 13 is formed in a rectangular parallelepiped shape having a top plate 23, a side plate 24, and a bottom plate 25, and incorporates an electrical component for converting a commercial power source into a DC power source for an LED light emitting unit. The power supply device 13 is electrically connected to an external commercial power supply through a power supply terminal block 26 attached to an end portion, and is also electrically connected to a printed circuit included in a circuit board of the LED light emitting portion. The power supply device 13 has a height dimension L1, a width dimension L2, and a length dimension L3. In the power supply device 13, the screw 28 is screwed into the screw hole (see FIG. 2) 27 provided in the upper end portion of the second radiating fin portion 18 of the instrument body 11 from the end portion of the top plate 23, so that the bottom plate 25 is connected to the power supply device. It is assembled in contact with the mounting portion 19.

  As shown in FIG. 2, the instrument body 11 has a screw hole 27 at the upper end portion of the second radiating fin portion 18, and a screw hole 29 for screwing the screw 21 into the top plate 14. The appliance main body 11 has a power supply device mounting portion 19 having a height dimension L4 substantially equal to the height dimension L1 of the power supply apparatus 13 and a width dimension L5 substantially equal to the width dimension L2 of the power supply apparatus 13. The length dimension L6 is sufficiently shorter than the length dimension L3 of thirteen.

  In such a lighting apparatus 10, the frame 12 is integrally assembled to the apparatus main body 11 by screwing the screws 21 into the frame 12 through the screw holes 29 of the apparatus main body 11. Thereafter, the screw 28 is screwed into the screw hole 27 at the upper end portion of the second radiating fin portion 18 of the instrument main body 11 from the end of the top plate 23 of the power supply device 13, whereby the power supply device 13 becomes the power supply device of the instrument main body 11. It is attached to the attachment part 19. At this time, the instrument main body 11 has a width dimension L5 corresponding to substantially half the area of the top plate 14 of the radiation fins 16 and substantially equal to the width dimension L2 of the power supply device 13, and the second radiation fin portion. A power supply device 13 is attached to a power supply device attachment portion 19 located on the side of 18. Therefore, the instrument main body 11 thermally connects the second radiating fin portion 18 to the side plate 24 of the power supply device 13 and thermally connects the first radiating fin portion 17 to the bottom plate 25 of the power supply device 13.

Therefore, in the lighting fixture 10 of the first embodiment, the power supply device 13 is attached to the power supply device attachment portion 19 corresponding to a substantially half region that is a part of the top plate 14.
Thereby, in the lighting fixture 10 of this 1st Embodiment, compared with the conventional thing with which the power supply device was attached so that it might be located in the outer area | region of an fixture main body through the arm part on the outer bottom face of the fixture main body. Since the apparatus 13 does not protrude greatly outside the instrument body 11, the overall size can be reduced.

Moreover, in the lighting fixture 10 of this 1st Embodiment, the power supply device 13 is attached to the power supply device attaching part 19 corresponded in the substantially half area | region which is a part of the top plate 14. FIG.
Thereby, in the lighting fixture 10 of this 1st Embodiment, the freedom degree at the time of arrange | positioning the radiation fin 16 to the instrument main body 11 becomes high compared with the conventional thing with which the power supply device was attached to the upper surface of the instrument main body. High heat dissipation characteristics can be set.

And in the lighting fixture 10 of this 1st Embodiment, the 1st radiation fin part 17 and the 2nd radiation fin part 18 are arrange | positioned around the power supply device attaching part 19. FIG.
Thereby, in the lighting fixture 10 of this 1st Embodiment, a highly efficient heat dissipation characteristic can be acquired by thermally connecting the radiation fin 16 to the whole circumference | surroundings of the power supply device 13. FIG.

Furthermore, in the lighting fixture 10 of this 1st Embodiment, it has the cut part 20 cut off in the shape of an inclination near the upper end part of the 2nd radiation fin part 18. As shown in FIG.
Thereby, in the lighting fixture 10 of this 1st Embodiment, since the thermal radiation area of the 2nd thermal radiation fin part 18 is expanded, it can aim at the improvement of a thermal radiation characteristic, and it is a fixture main body at the time of construction to a ceiling construction surface Since the upper end surface of 11 does not interfere with the ceiling material, the workability can be improved.

In addition, in the lighting fixture 10 according to the first embodiment, the power supply device mounting portion 19 that is thermally connected to the first heat radiating fin portion 17 and the second heat radiating fin portion 18 includes the height dimension L1 of the power supply device 13. Has a height dimension L4 approximately equal to.
Thereby, in the lighting fixture 10 of this 1st Embodiment, the radiation fin 16 with a high freedom degree can be arrange | positioned, without the radiation fin 16 projecting upwards from the upper end part of the power supply device 13. FIG.

Furthermore, in the luminaire 10 of the first embodiment, the power supply device mounting portion 19 that is thermally connected to the first heat radiating fin portion 17 and the second heat radiating fin portion 18 is substantially equal to the width dimension L2 of the power supply device 13. Have equal width dimension L5.
Thereby, in the lighting fixture 10 of this 1st Embodiment, the radiation fin 16 with a high freedom degree can be arrange | positioned, without the radiation fin 16 projecting in the width direction of the power supply device 13. FIG.

(Second Embodiment)
Next, the power supply device and lighting fixture of 2nd Embodiment of this invention are demonstrated. In the following embodiments, components that are the same as those in the first embodiment described above or functionally similar components are simplified or omitted by giving the same reference numerals or equivalent symbols in the drawings. To do.
As shown in FIGS. 3 and 4, the lighting fixture 40 according to the second embodiment of the present invention has a fixture main body provided with a power supply device mounting portion 42 in an area corresponding to almost half of the top plate 14 on the top surface of the top plate 14. 41 is applied. A spacer 43 is formed on the power supply device mounting portion 42. The spacer 43 is endless and formed in a rib shape having a predetermined height dimension on the power supply device mounting portion 42 of the top plate 14. Therefore, when the power supply device 13 is attached to the power supply device attachment portion 42, a space is formed between the bottom plate 25 of the power supply device 13 and the top plate 14 of the instrument body 41. The spacer 43 may be an O-ring or a washer-shaped gap member instead of the illustrated rib shape.

Therefore, in the lighting fixture 40 of the second embodiment, a space is formed between the bottom plate 25 of the power supply device 13 and the top plate 14 of the fixture body 41 by the spacer 43.
Thereby, in the lighting fixture 40 of this 2nd Embodiment, the heat from LED light emission part does not transmit directly to the power supply device 13, and the heat from the power supply device 13 transfers directly to the fixture main body 41. FIG. Therefore, the influence of heat on the power supply device 13 and the instrument main body 41 can be reduced.

(Third embodiment)
Next, the power supply device and lighting fixture of 3rd Embodiment of this invention are demonstrated.
As shown in FIGS. 5 and 6, a lighting apparatus 50 according to a third embodiment of the present invention includes a power supply device 51 having a pair of side fins 24 on the long side and heat dissipating fins 52 on the bottom plate 25. Has been applied.

Therefore, in the lighting fixture 50 of the third embodiment, the power supply device 51 radiates heat through the radiating fins 52 of the pair of side plates 24.
Thereby, in the lighting fixture 50 of this 3rd Embodiment, the thermal radiation of the side of the power supply device 51 can be performed efficiently, and the heat dissipation characteristic of the power supply device 51 can be improved.

Moreover, in the lighting fixture 50 of this 3rd Embodiment, the heat radiating of the power supply device 51 is made through the radiation fins 53 of the bottom plate 25.
Thereby, in the lighting fixture 50 of this 3rd Embodiment, the thermal radiation characteristic of the power supply device 51 can be improved by performing the efficient heat dissipation in the downward direction of the power supply device 51. FIG.

  In addition, the instrument main body, the frame, etc. which were used in each embodiment are not limited to what was illustrated, and can be changed suitably.

10, 40, 50 Lighting fixture 11, 41 Appliance main body 12 Frame 13, 51 Power supply device 16, 52, 53 Radiation fin 17 First radiation fin portion (radiation fin)
18 Second radiation fin part (radiation fin)
23 Top plate 24 Side plate 25 Bottom plate 26 Power supply terminal block 43 Spacer

Claims (1)

An instrument body;
An LED light emitting unit having a circuit board on which a plurality of LED chips are mounted;
A frame attached to the instrument body;
A power supply device attached to the instrument body ,
It is a lighting fixture that can be attached to the mounting hole on the ceiling construction surface,
The instrument body has a heat radiating portion and a power supply device mounting portion,
The LED light emitting unit is accommodated in the instrument body,
The heat dissipating part protrudes toward the axial direction of the instrument body in a partial region of the upper surface of the instrument body,
The power supply device mounting portion has a plane perpendicular to the axial direction of the instrument body, and the height from the flat surface to the upper end of the heat dissipation portion is substantially equal to the height of the power supply device, It is formed in the area of the other part of the upper surface of the instrument body,
The power supply device has a top plate, a side plate, and a bottom plate, incorporates an electrical component for converting an external commercial power source to a DC power source for the LED light emitting unit, and is electrically connected to the circuit board. A part of the power supply device protrudes to the outside of the instrument body, the opposite side to the protruded outside faces the heat radiating portion, and the bottom plate contacts the flat surface of the power supply device mounting portion. Assembled,
Luminaire, characterized in that the pop-out outer side plate, and a power supply terminal block for electrically connecting said an external commercial power supply device is mounted.

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