JP2012123979A - Lighting fixture - Google Patents

Abstract

It is possible to select whether to use a power supply unit integrally with a main body or to use it separately in accordance with the size, shape, etc. of the installation location of a lighting fixture.
A lighting fixture 11 incorporates an LED substrate in a main body 12. In a state where the power supply unit 13 is accommodated in the recess 18 of the main body 12, the power supply unit 13 is fixed to the recess 18 by attaching the metal fitting 14 to the recess 18. On the other hand, in a state where the power supply unit 13 is placed in the vicinity of the main body 12, the metal fitting 14 is removed from the recess 18, and the metal fitting 14 is used as a leg portion that supports the power supply unit 13. The power supply unit 13 supplies power to the LED substrate via the dedicated harness 24 in both the state of being housed in the recess 18 of the main body 12 and the state of being not housed in the recess 18 of the main body 12.
[Selection] Figure 4

Description

  The present invention relates to a lighting fixture.

  As the light output of the lighting fixture increases, the power supply circuit board tends to increase in size, but there are some that reduce the size of the fixture by arranging at least two power supply circuit boards in the main body (for example, see Patent Document 1). ).

JP 2009-301810 A

  However, when the power supply circuit board is built in the main body, the height of the instrument increases as the power supply circuit board becomes larger. In the case of a downlight, if the height of the ceiling behind the lighting fixture is low, the lighting fixture may not be attached.

  An object of the present invention is to make it possible to select, for example, whether the power supply unit is used integrally with the main body or used separately in accordance with the size and shape of the installation location of the lighting fixture.

A lighting apparatus according to one aspect of the present invention includes:
A light source unit that emits light;
A power supply unit connected to the light source unit by a cable and supplying power to the light source unit via the cable;
A main body containing the light source unit, and a main body having a recess that detachably accommodates the power supply unit,
The power supply unit supplies power to the light source unit via the cable in both the state of being housed in the recess of the main body and the state of being not housed in the recess of the main body.

  According to one aspect of the present invention, the power supply unit can supply power to the light source unit in either the state of being housed in the recess of the main body or the state of being not housed in the recess of the main body. It is possible to select whether the power supply unit is used integrally with the main body or used separately according to the size and shape of the installation location. Therefore, in the case of a downlight, the height of the appliance can be lowered according to the height of the ceiling, even if the power circuit board is enlarged. That is, by reducing the size of the luminaire and making the structure in which the power supply unit mounted with the power supply circuit can be separated, the luminaire can be attached to a ceiling surface with a shallow embedding hole, for example.

The perspective view which shows the state which accommodated the power supply unit of the lighting fixture which concerns on Embodiment 1 in a main body. FIG. 3 is an exploded perspective view of the lighting apparatus according to Embodiment 1. FIG. 4 is a four-side view of the power supply unit of the lighting fixture according to Embodiment 1. The perspective view which shows the state which put the power supply unit of the lighting fixture which concerns on Embodiment 1 separately. The perspective view which shows the state which attached the power supply unit of the lighting fixture which concerns on Embodiment 1 to the main body side.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing a state in which the power supply unit 13 of the lighting fixture 11 according to the present embodiment is housed in the main body 12. FIG. 2 is an exploded perspective view of the lighting fixture 11. FIG. 3 is a four-side view of the power supply unit 13.

  The lighting device 11 is a device (for example, a downlight) that is used by being embedded in an embedding hole in a ceiling. The luminaire 11 includes a cylindrical main body 12 having thermal conductivity, a power supply unit 13 that is attached to the center of the main body 12 and includes a power circuit board, a metal fitting 14 that is attached to the outer surface of the power supply unit 13, and the main body 12. And a screw 15 for connecting the metal fitting 14 and a decorative frame 17 attached to the main body 12. Although not shown, the luminaire 11 is further attached to the main body 12 and mounted with an LED board as a light emitting element, a reflecting member for fixing the LED board, a front of the reflecting member (irradiation of LED light). And a transparent cover installed in the direction).

  The main body 12 includes an LED substrate. The main body 12 is formed of, for example, a material having high thermal conductivity made of aluminum die casting, and its outer surface is baked and coated with a white melamine resin-based paint. Other materials may be used as long as thermal conductivity can be ensured. A plurality of heat dissipating fins 23 extending in the vertical direction are formed on the outer surface of the cylindrical main body 12. Since the LED substrate is thermally coupled to the main body 12, the heat of the LEDs mounted on the LED substrate is radiated by these heat radiation fins 23. In the present embodiment, the main body 12 has a substantially cylindrical shape, but may have a rectangular parallelepiped shape, a cubic shape, a polygonal column shape, or other shapes. In the present embodiment, eight radiating fins 23 are provided, but the number of radiating fins 23 is not limited to this.

  The main body 12 includes a recess 18 that detachably accommodates the power supply unit 13 and a side portion 19 to which the power supply unit 13 can be attached when the power supply unit 13 is not accommodated in the recess 18. In the present embodiment, among the eight heat dissipating fins 23, the heat dissipating fins 23 at the end of the main body 12 are counted to the fourth heat dissipating fins 23, and the fifth heat dissipating fins 23 are separated from the main body 12. The radiating fins 23 at the end of (i.e., the eighth sheet) are arranged at substantially equal intervals. On the other hand, the fourth heat dissipating fin 23 and the fifth heat dissipating fin 23 are widely spaced from each other to form the recess 18. Further, the fourth heat dissipating fin 23 and the fifth heat dissipating fin 23 extend in the direction in which the end portions on the same side in the longitudinal direction approach each other to form the side portion 19. In other words, in the present embodiment, the concave portion 18 and the side portion 19 are formed by the two radiating fins 23 at the center among the plurality of radiating fins 23. Note that both the recess 18 and the side portion 19 may be formed by another heat radiating fin 23 or another portion of the main body 12. For example, a plurality of (for example, 12) radiating fins 23 are arranged at substantially equal intervals on substantially the entire top surface of the main body 12, and some (for example, 6 in the center of the 12) radiating fins 23 are arranged. A notch that forms the recess 18 may be provided. Further, a peripheral wall or the like that forms the side portion 19 separately from the heat radiating fins 23 may be provided on the upper portion of the main body 12.

  As shown in FIG. 2, the recess 18 of the main body 12 is provided with two pairs of screw holes 12b. Specifically, two screw holes 12b are formed at the top of each of the fourth and fifth radiating fins 23. Further, a pair of screw holes 12 c are provided in the side portion 19 of the main body 12. Specifically, one screw hole 12c is formed in the upper part of the extended part of each of the fourth and fifth radiating fins 23.

  The power supply unit 13 is formed in a box shape from a steel plate, for example, and has a power circuit board inside. The power supply unit 13 has a terminal block 16 connected to the power supply circuit board through internal wiring and installed on the outer surface.

  Components such as a control IC, a transformer, and a capacitor are mounted on the power supply circuit board of the power supply unit 13. The power supply circuit board is electrically connected to the LED board built in the main body 12 through a dedicated harness 24 (cable), and supplies power to the LED board via the dedicated harness 24 to control lighting of the LED. The terminal block 16 of the power supply unit 13 inputs power from an external power supply to the power supply circuit board.

  The power supply unit 13 can be built in the main body 12 and can be separated from the main body 12. As shown in FIG. 2, screw holes 13 a are provided at two locations on one of the outer surfaces (for example, the front surface) of the power supply unit 13. A metal fitting 14 is fixed to this surface by screws 15. In the present embodiment, by using the metal fitting 14 and the screw 15 as a fixing member, the power supply unit 13 can be attached to the main body 12 and the power supply unit 13 can be installed on the back side of the ceiling surface. When the power supply unit 13 is attached to the main body 12 with the metal fitting 14, the lighting fixture 11 can be reduced in size. Of the outer surface of the power supply unit 13, for example, not only the front surface but also the back surface can be provided with screw holes 13a. In this case, since it can be selected on which surface of the power supply unit 13 the metal fitting 14 is attached, the direction in which the power supply unit 13 is attached to the main body 12 can be determined according to the situation.

  As shown in FIG. 2, the metal fitting 14 has a through hole 14 a corresponding to the screw hole 13 a of the power supply unit 13, a through hole 14 b corresponding to the screw hole 12 b of the recess 18 of the main body 12, and a side portion 19 of the main body 12. And a through hole 14c corresponding to the screw hole 12c. For example, the metal fitting 14 is formed by bending one plate-like member in which one through hole 14a, one through hole 14b, and two through holes 14c are provided in order from one end to the other end. . At this time, the portion of the plate-like member where the through hole 14a is provided and the portion where the through hole 14b is provided are bent, and the plate surfaces of the two portions are substantially vertical. And on the opposite side, the portion between the plate-like member where the through-hole 14b is provided and the portion where the through-hole 14c is provided bend, and the plate surfaces of the two portions become substantially vertical. Yes. In other words, the plate-like member is bent in a stepped shape composed of two steps, and a horizontal plane (plate) and a vertical plane (plate) forming one step have a through hole 14a and a through hole 14b in order. The horizontal plane (plate) forming another step has a through hole 14c.

  The screws 15 (two) are passed through the through holes 14 a of the pair of left and right metal fittings 14 and screwed into the screw holes 13 a of the power supply unit 13. Thereby, the metal fitting 14 can be fixed to the power supply unit 13 with screws. At the same time, the screws 15 (another two) are passed through the through holes 14b of the pair of left and right metal fittings 14 and screwed into the screw holes 12b of the recess 18 of the main body 12. As a result, the power supply unit 13 can be screwed and fixed inside the recess 18 of the main body 12. Alternatively, as will be described later, the screw 15 (another two pieces) may be threaded into the screw hole 12c of the side portion 19 of the main body 12 through the through hole 14c of one of the pair of left and right metal fittings 14. is there. In this case, the power supply unit 13 can be fixed to the side portion 19 of the main body 12 (outside the concave portion 18) by screwing. In addition, as a fixing member for fixing the power supply unit 13 to the concave portion 18 or the side portion 19 of the main body 12, instead of the combination of the metal fitting 14 and the screw 15, a combination of members that can be fitted, Combinations or other members may be used.

  The decorative frame 17 is made of, for example, an ABS (acrylonitrile, butadiene, styrene) resin in a substantially umbrella shape, and an annular flange 17a is formed at the open end of the divergent shape. 12 is attached. In addition, a pair of attachment leaf springs 22 for fixing the luminaire 11 to the ceiling is mounted on the outer peripheral surface.

  Although not shown, a plurality of LEDs serving as light sources are mounted on the surface side of the LED substrate by a surface mounting method, and light is emitted from the LEDs. The LED substrate is made of, for example, a substantially circular flat plate made of an insulating material or metal, and is attached so as to be in close contact with the bottom wall of the main body 12. Accordingly, it is thermally coupled to the main body 12. It should be noted that an adhesive may be interposed between the bottom wall of the main body 12 and the back side of the LED substrate. In this case, it is preferable to use a material having good thermal conductivity obtained by mixing a metal oxide or the like with a silicone resin-based adhesive. The adhesive here is only required to be in close contact with the bottom wall of the main body 12 and the LED substrate, and may be a simple sheet-like member or a cured resin. Moreover, when the material of the LED substrate is an insulating material, it is desirable to use a ceramic material or a synthetic resin material having relatively good heat dissipation characteristics and excellent durability. When a synthetic resin material is used, it can be formed of, for example, a glass epoxy resin. Moreover, when it is made of metal, it is desirable to use a material having good thermal conductivity such as aluminum and excellent heat dissipation. As the light source unit for irradiating light, an incandescent lamp, a fluorescent lamp, an EL (electroluminescence), or other light source that irradiates light may be used instead of the LED substrate.

  On the surface side of the LED substrate, for example, a reflective member formed of white polycarbonate, ASA (acrylonitrile / styrene / acrylic acid ester) resin or the like is disposed. The reflecting member has a function of efficiently irradiating light emitted from the LED by controlling light distribution.

  The transmissive cover is formed of a white, translucent, diffusive material, or a transparent material (resin or glass).

  FIG. 4 is a perspective view showing a state in which the power supply unit 13 of the lighting fixture 11 is placed separately.

  The power supply unit 13 can be removed from the main body 12, and the metal fitting 14 can be installed as a leg of the power supply unit 13 in the vicinity of the main body 12. That is, the power supply unit 13 can be placed in the vicinity of the main body 12 on the ceiling member in a state where it is not accommodated in the recess 18 of the main body 12. The power supply unit 13 supplies power to the LED substrate via the dedicated harness 24 in both the state of being housed in the recess 18 of the main body 12 and the state of being not housed in the recess 18 of the main body 12. For this reason, the luminaire 11 can be used even when the power supply unit 13 is detached from the main body 12.

  In the state shown in FIG. 1, that is, in the state where the power supply unit 13 is housed in the recess 18 of the main body 12, the metal fitting 14 is attached to the recess 18, and the screw 15 passed through the through hole 14 b of the metal fitting 14 The power supply unit 13 can be fixed to the concave portion 18 by stopping at. On the other hand, in the state shown in FIG. 4, that is, in a state where the power supply unit 13 is placed in the vicinity of the main body 12, the metal fitting 14 is removed from the recess 18 and the metal fitting 14 can be used as a leg portion that supports the power supply unit 13. it can.

  As described above, according to the present embodiment, it is possible to select whether the power supply unit 13 is used integrally with the main body 12 or used separately according to the size and the shape of the installation place of the lighting fixture 11. . In addition, even if the lighting fixture 11 is not used by being embedded in the embedding hole of the ceiling, the same effect can be obtained by adopting the same configuration.

  FIG. 5 is a perspective view showing a state where the power supply unit 13 of the lighting fixture 11 is attached to the side (side portion 19) of the main body 12. FIG.

  The power supply unit 13 can be removed from the main body 12, and the metal fitting 14 attached to the side on which the dedicated harness 24 protrudes can be attached to the screw hole 12 c of the side portion 19 of the main body 12 with the screw 15. That is, the power supply unit 13 can be installed on the side portion 19 of the main body 12 in a state where it is not accommodated in the recess 18 of the main body 12. As described above, the power supply unit 13 supplies power to the LED substrate via the dedicated harness 24 in both the state of being housed in the recess 18 of the main body 12 and the state of being not housed in the recess 18 of the main body 12. For this reason, the lighting fixture 11 can be used even in a state where the power supply unit 13 is attached to the outside (side portion 19) instead of the inside (recess portion 18) of the main body 12.

  In the state shown in FIG. 1, that is, in the state where the power supply unit 13 is housed in the recess 18 of the main body 12, the metal fitting 14 is attached to the recess 18, and the screw 15 passed through the through hole 14 b of the metal fitting 14 The power supply unit 13 can be fixed to the concave portion 18 by stopping at. On the other hand, in the state shown in FIG. 5, that is, in a state where the power supply unit 13 is installed on the side portion 19 of the main body 12, the metal fitting 14 is removed from the recess 18, and The power supply unit 13 can be fixed to the side portion 19 by stopping the screw 15 passed through the through hole 14 c of the metal fitting 14 in the screw hole 12 c of the side portion 19.

  Thus, according to the present embodiment, it is possible to select whether the power supply unit 13 is attached to the inside of the main body 12 or attached to the outside in accordance with the size, shape, etc. of the installation place of the lighting fixture 11. In addition, even if the lighting fixture 11 is not used by being embedded in the embedding hole of the ceiling, the same effect can be obtained by adopting the same configuration.

  DESCRIPTION OF SYMBOLS 11 Lighting fixture, 12 Main body, 12b, 12c Screw hole, 13 Power supply unit, 13a Screw hole, 14 Metal fitting, 14a, 14b, 14c Through hole, 15 Screw, 16 Terminal block, 17 Cosmetic frame, 17a Flange, 18 Recessed part, 19 Side, 22 leaf spring for mounting, 23 heat radiation fin, 24 dedicated harness.

Claims (4)

A light source unit that emits light;
A power supply unit connected to the light source unit by a cable and supplying power to the light source unit via the cable;
A main body containing the light source unit, and a main body having a recess that detachably accommodates the power supply unit,
The lighting apparatus according to claim 1, wherein the power supply unit supplies power to the light source unit via the cable in both of a state in which the power supply unit is accommodated in the recess of the main body and a state in which the power supply unit is not accommodated in the recess of the main body. The power supply unit is placed in the vicinity of the main body in a state where it is not accommodated in the recess of the main body,
The lighting apparatus further includes:
In the state where the power supply unit is housed in the concave portion of the main body, the fixing member is attached to the concave portion of the main body and fixes the power supply unit to the concave portion of the main body, and the power supply unit is placed in the vicinity of the main body The lighting apparatus according to claim 1, further comprising: a fixing member that is used as a leg portion that is removed from the concave portion of the main body and supports the power supply unit. The lighting apparatus is an apparatus used by being embedded in a ceiling embedding hole,
The lighting apparatus according to claim 1, wherein the power supply unit is placed on a ceiling member in a state where the power supply unit is not accommodated in the recess of the main body. The power supply unit is installed in a side portion of the main body in a state where it is not accommodated in the concave portion of the main body,
The lighting apparatus further includes:
In the state where the power supply unit is housed in the concave portion of the main body, the fixing member is attached to the concave portion of the main body and fixes the power supply unit to the concave portion of the main body, and the power supply unit is installed on a side portion of the main body. The lighting fixture according to claim 1, further comprising: a fixing member that is attached to a side portion of the main body and fixes the power supply unit to the side portion of the main body.

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