JP2018110066A - Embedded type lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an embedded type lighting device which has a small number of components and can radiate heat generated by an LED module and a power supply unit.SOLUTION: An embedded type lighting device 100 is embedded and attached to an attached part C. The embedded type lighting device 100 has: a light source part 21; a power supply part 51 which supplies power to the light source part 21; and a cover material 60 which has a heat radiation part 622 and covers the light source part 21 and the power supply part 51 in a state where the light source part 21 and the power supply part 51 are parallely arranged in a horizontal direction.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an embedded lighting fixture.

  2. Description of the Related Art Conventionally, a downlight-type embedded lighting fixture that is embedded in a mounting hole formed in a ceiling or the like is known (see, for example, Patent Document 1). The downlight type embedded lighting fixture includes an LED module in which LEDs are arranged in a substrate circuit, and a power supply unit. The power supply unit is accommodated in the case part, and the LED module is arranged in the light source arrangement part. In the embedded luminaire, the light source arrangement part is arranged in the attachment hole of the attachment surface such as the ceiling, and the case part is placed on the upper surface of the ceiling plate.

Japanese Patent Laying-Open No. 2015-050008

  In the embedded luminaire described in the above publication, for example, a heat sink or a cooling fan is provided to increase the heat dissipation effect of the heat generated in the LED module. It was difficult to reduce the number of parts to be processed.

  The present invention has been made in view of the above, and an object of the present invention is to provide an embedded lighting fixture that has a small number of components and can dissipate heat generated by an LED module and a power supply unit.

  In order to achieve the above object, the present invention provides an embedded lighting device (for example, an embedded lighting device 100 described later) that is embedded and mounted in a mounted portion (for example, a mounted portion C described later), A light source unit (for example, power source unit 51 described later), a power source unit for supplying power to the light source unit (for example, power source unit 51 described later), and a heat radiating unit (for example, heat radiation fin 622 described later), And a cover material (for example, a cover material 60 described later) that covers the light source unit and the power source unit in a state where the power source units are arranged in parallel in the horizontal direction.

  The cover material is preferably made of a metal having thermal conductivity. The cover material has an upper cover part (for example, an upper cover part 61 described later) and a lower cover part (for example, a lower cover part 71 described later), and the upper cover part and the lower cover part are These are preferably integrally molded. Further, it is preferable that the power supply unit has a power supply circuit (for example, a power supply circuit 511 described later), and the power supply circuit is fixed to the upper cover unit.

  According to the present invention, it is possible to provide an embedded luminaire that has a small number of components and can dissipate heat generated by the LED module and the power supply unit.

It is a downward perspective view which shows the implantable lighting fixture 100 which concerns on one Embodiment of this invention. It is an upper perspective view which shows the implantable lighting fixture 100 which concerns on one Embodiment of this invention. It is a top view which shows the implantable lighting fixture 100 which concerns on one Embodiment of this invention. It is sectional drawing which shows the implantable lighting fixture 100 which concerns on one Embodiment of this invention. It is a disassembled perspective view which shows the embedded lighting fixture 100 which concerns on one Embodiment of this invention.

Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a lower perspective view showing an embedded lighting apparatus 100 according to an embodiment of the present invention. FIG. 2 is an upper perspective view showing the embedded lighting apparatus 100 according to the embodiment of the present invention. FIG. 3 is a plan view showing an embedded lighting apparatus 100 according to an embodiment of the present invention.

As shown in FIG. 1, the embedded lighting device 100 is embedded in, for example, a circular mounting hole H formed in a mounting portion C such as an entrance of a building structure or a ceiling such as a garden room or a carport. It is a downlight installed. The attached portion C is the ceiling of the entrance arch formed by the metal plate C1.
In the following description, the vertical direction of the embedded lighting device 100 is defined and described as the vertical direction in the state in which the embedded lighting device 100 is installed on the attached portion C (the vertical direction in FIG. 4). FIG. 4 is a cross-sectional view showing an embedded lighting apparatus 100 according to an embodiment of the present invention.

The embedded lighting device 100 includes a light source unit 21, a power source unit 51, and a cover material 60.
The cover member 60 constitutes a cover having an upper cover part 61 that houses the light source part 21 and the power supply part 51, and a lower cover part 71 that covers the lower part of the upper cover part 61.

  The upper cover portion 61 is made of a metal having thermal conductivity, specifically, an aluminum alloy integrally formed by die casting. The upper cover portion 61 is mainly formed integrally with the heat sink 62 to which the light source portion 21 is fixed and the heat sink 62. And a power supply accommodating portion 64 that is connected and mainly covers and accommodates the power supply portion 51.

  The lower part of the heat sink 62 has a light source fixing part 621, and the light source fixing part 621 is provided with the light source part 21. The upper part of the heat sink 62 has heat radiation fins 622 as heat radiation parts integrally formed with the light source fixing part 621.

  The light source unit 21 is a part that emits light toward the irradiation surface side of the embedded lighting fixture 100. As shown in FIG. 4 and the like, the light source unit 21 is fixed to the light source fixing unit 621 and includes a substrate 22 and an LED element that is fixed to the substrate 22 and to which the lens 23 is attached. The board | substrate 22 comprises the LED module provided with the 1 or several LED element which is a point light source on the board | substrate surface processed into flat form. A lens 23 is disposed opposite to the LED element. The substrate 22 is disposed in contact with the bottom surface 44a of the light source fixing portion 621 of the heat sink 62, and is attached by an attachment member such as a screw. The substrate 22 is electrically connected to the power supply unit 51 by wiring not shown. Since the substrate 22 is in contact with the bottom surface 44a of the light source fixing portion 621, when the LED element is turned on, the heat of the substrate 22 generated by the current flow is transmitted to the light source fixing portion 621.

  In this embodiment, a surface-mounted LED element is used as the light source. However, the type of the light source is not limited to the surface-mounted LED element, and examples thereof include a COB type light emitting module and an organic EL element (OLED). Is also feasible. Moreover, the board | substrate 22 may be attached to the light source fixing | fixed part 621 via a heat conductive sheet (not shown) and thermal radiation grease, and, thereby, higher heat dissipation can be obtained.

  The lens 23 is an optical member for controlling light distribution of light (emitted light) emitted from the LED element. The lens 23 is formed by applying a highly translucent and chemically stable optical material (for example, acrylic resin, polycarbonate, glass, or the like). In addition, the lens 23 of the present embodiment may be formed in a shape according to the application. In the present embodiment, the lens 23 has a lens body 24 composed of a convex meniscus lens, as shown in FIG. The lens body 24 is formed in a convex curved shape in which the central portion of the exit surface protrudes downward. Further, the lens body 24 is formed in a concave curved surface shape in which the central portion of the incident surface is recessed downward.

  On the lower surface (bottom surface 44a) side of the light source fixing portion 621, the reflecting portion 31 is provided. The reflecting portion 31 constitutes a light source reflector having a shape that opens downward in an umbrella shape around the light source portion 21. As shown in FIG. 4, the reflecting portion 31 includes an opening 32 and a peripheral wall portion 33 that is substantially C-shaped in cross section. The reflecting portion 31 is formed in a parabolic shape in which the peripheral wall portion 33 extending from the opening portion of the light source fixing portion 621 expands downward. The inner peripheral surface of the peripheral wall portion 33 constitutes a reflection surface that reflects light emitted from the LED elements of the light source portion 21. Further, as shown in FIG. 5, a plurality of substantially semicircular concave portions 331 are formed at equal intervals on the outer peripheral surface of the peripheral wall portion 33. FIG. 5 is an exploded perspective view showing an embedded lighting apparatus 100 according to an embodiment of the present invention. The lower end portion of the reflecting portion 31 is disposed so as to face the upper surface of the LED cover 81.

  The LED cover 81 restricts light emitted from the light source unit 21 of the embedded lighting fixture 100. The LED cover 81 covers the opening 32 that emits the light emitted from the light source unit 21 to the outside, and is disposed so as to close the opening 32 of the reflection unit 31 as shown in FIG. The portion of the LED cover 81 that closes the opening 32 has a flat disk shape, and its peripheral edge portion is formed to extend upward. The peripheral edge portion of the LED cover 81 is supported in a state where the packing 91 is sandwiched between the peripheral edge portion of the LED cover 81 and the upper surface of the lower end flange portion 722 that forms the opening of the lower cover portion 71.

  The LED cover 81 is formed of a translucent member and is formed of an insulating material. Specifically, the LED cover 81 is formed of, for example, a flat acrylic resin. The LED cover 81 constitutes a translucent cover that transmits light from the LED elements disposed in the light source fixing part 621 of the heat sink 62. The LED cover 81 forms an emission surface on the side (the lower side in FIG. 4) visually recognized by the user, for example, when the embedded lighting device 100 is attached to the attached portion C. In addition, light from the light source unit 21 is incident on the upper surface of the LED cover 81.

  The power supply accommodating portion 64 is formed in a box shape and has a power supply accommodating space 641 that opens downward. As shown in FIG. 4 and the like, the power supply accommodating portion 64 has a positional relationship in which it is arranged in parallel with the heat sink 62 in the horizontal direction. For this reason, the power supply part 51 accommodated in the power supply part accommodation space 641 has the positional relationship arrange | positioned in parallel with the light source part 21 in the horizontal direction.

  Here, “the positional relationship in which the power supply unit 51 and the light source unit 21 are arranged in parallel in the horizontal direction” is a positional relationship in which the power supply unit 51 and the light source unit 21 are arranged side by side in the strict horizontal direction. Not only does it mean that the light source unit 21 and the power source unit accommodating space 641 are arranged in parallel in the horizontal direction, as in the present embodiment, but the power source unit 51 is arranged. And the light source unit 21 have a positional relationship in which they are arranged substantially in parallel in the horizontal direction. The power supply unit 51 is housed in the power supply housing space 641 and is fixed to the power supply housing 64.

  The power supply unit 51 is a power supply device for supplying power to the LED elements included in the light source unit 21 and lighting the LED elements. The power supply unit 51 includes a power supply circuit 511 in which a plurality of electronic components 513 are mounted on a printed wiring board 512 processed into a rectangular shape. The power supply accommodating portion 64 covers the periphery of the power supply circuit 511 and holds the power supply circuit 511 at a predetermined position in the power supply accommodating portion 64. The plurality of electronic components 513 include components that generate heat during operation. Heat generated from the electronic component 513 is transmitted to the power supply accommodating portion 64. The power supply unit 51 performs control to convert a direct current that has been stepped down by a transformer (not shown) into a direct current having an appropriate specification that can be supplied to a plurality of LED elements mounted on the substrate 22. The power supply unit 51 is electrically connected to an external commercial power supply via a power supply line 515 having a connector and a transformer (not shown) at the tip.

  The heat radiating fins 622 are plate-shaped heat radiating members formed by protruding a plurality from the upper surface of the light source fixing portion 621 upward. The plurality of heat radiating fins 622 are formed to extend to the power supply accommodating portion 64 in parallel to the direction connecting the heat sink 62 and the power supply accommodating portion 64 (the left-right direction in FIGS. 3 and 4). The heat generated by the light source unit 21 is transmitted to the entire heat sink 62 through the light source fixing unit 621 and is radiated from the heat radiation fins 622.

  The lower cover portion 71 is made of a metal having thermal conductivity, specifically, an aluminum alloy integrally formed by die casting, and mainly includes a light source portion facing portion 72 facing the lower side of the light source portion 21, and a light source portion. A power supply part facing part 74 that is integrally formed and connected to the facing part 72 and faces the lower side of the power supply part 51 is provided.

  As shown in FIG. 5, the light source portion facing portion 72 includes a cylindrical portion 721 and a lower end flange portion 722. The cylindrical portion 721 has a positional relationship in which the direction in which the axis extends extends in the vertical direction. A mounting spring engaging groove 724 extending in the vertical direction is formed on the outer surface of the cylindrical portion 721. The mounting spring engagement groove 724 is formed at a diameter position in a direction (vertical direction in FIG. 3) perpendicular to the direction connecting the cylindrical portion 721 and the power supply facing portion 74 in the cylindrical portion 721 having a circular shape in plan view. A pair is formed.

  The upper end of the attachment spring 76 is fixed to the upper end of the cylindrical portion 721 corresponding to the upper end of the pair of attachment spring engaging grooves 724 by screws. Most of the attachment spring 76 is disposed in the attachment spring engaging groove 724. The attachment spring 76 is made of stainless steel, and is made of a strip-like and plate-like leaf spring bent at a plurality of locations. The lower end portion of the attachment spring 76 is formed in a shape that spreads outward in the radial direction of the cylindrical portion 721. Therefore, the attachment spring 76 biases the lower end portion of the attachment spring 76 so as to spread outward in the radial direction of the cylindrical portion 721. The lower end portion of the attachment spring 76 is engaged with the peripheral portion of the round attachment hole H of the attached portion, and the embedded lighting device 100 is fixed to the attached portion C. That is, when the embedded luminaire 100 is installed in the mounting hole H of the mounted portion C, the mounting spring 76 presses the periphery of the mounting hole H by the elastic force that the mounting spring 76 tries to spread. Thereby, the embedded lighting device 100 is fixed to the attached portion C.

  The lower end flange portion 722 is integrally formed and connected to the lower end portion of the cylindrical portion 721, spreads in a plate shape outward in the radial direction of the cylindrical shape portion 721, and plate-like inward in the radial direction of the cylindrical shape portion 721. A circular opening is formed that spreads and emits light emitted from the light source unit 21 to the outside. The peripheral portion of the LED cover 81 is placed on the lower flange portion 722 that spreads in a plate shape radially inward of the cylindrical portion 721 via an annular packing 91 (see FIG. 5) made of silicone resin. Has been supported.

  The power supply portion facing portion 74 is an upper end portion of the cylindrical portion 721 and is positioned between the pair of attachment spring engaging grooves 724 in the circumferential direction of the cylindrical portion 721 formed in a circular shape in plan view (see FIG. 3 to the right of the cylindrical portion 721). The power supply portion facing portion 74 is formed in a rectangular plate shape, and has a positional relationship facing the power supply portion 51 fixed to the upper cover portion 61.

The lower cover portion 71 having the above-described configuration is fixed to the upper cover portion 61 with screws through a cover 92 between cover portions made of silicone resin.
Specifically, the cover-to-cover packing 92 is formed in a flat annular shape along the peripheral edges of the upper cover 61 and the lower cover 71, and the peripheral edge of the upper cover 61 and the lower cover 71. It is sandwiched between the peripheral part of the.

  A portion of the peripheral portion of the cover-to-cover packing 92 that is sandwiched between the peripheral portion of the power supply portion facing portion 74 and the peripheral portion of the power supply accommodating portion 64 is formed to extend further downward. This portion covers the side surfaces of a pair of long sides and one short side that are not integrally connected to the cylindrical portion 721 among the sides around the power supply portion facing portion 74 formed in a rectangular shape. .

  Further, a part of the peripheral part of the cover-to-cover packing 92, which is sandwiched between the peripheral part of the cylindrical part 721 and the peripheral part of the light source fixing part 621, more specifically, the power supply part facing part. 74 of the cylindrical portion 721 opposite to the cylindrical portion 721 connected to 74, and the light source fixing portion 621 opposite to the light source fixing portion 621 connected to the power source housing portion. A portion in the vicinity of the portion between the cover portion packing 92 sandwiched by the side portion (portion in the vicinity of the left end portion in FIG. 4) is formed to extend further downward. As shown in FIG. 4, this portion enters between the inner peripheral surface of the cylindrical portion 721 and the outer peripheral surface of the portion extending upward from the peripheral edge portion of the LED cover 81.

According to this embodiment, the following effects are produced.
The embedded luminaire 100 attached to the attachment portion C includes a light source unit 21, a power source unit 51 that supplies power to the light source unit 21, and a heat dissipation fin 622 as a heat dissipation unit. And a cover member 60 that covers the light source unit 21 and the power source unit 51 in a state of being arranged in parallel in the horizontal direction.

  Thereby, the heat generated by the light source unit 21 and the power source unit 51 can be sufficiently radiated from the heat radiation fins 622. In addition, since the light source unit 21 and the power source unit 51 are arranged in parallel in the horizontal direction, the upper end of the light source unit 21 and the upper end of the power source unit 51 can be substantially the same height in the vertical direction. The height of the embedded lighting apparatus 100 can be overwhelmingly lower than that in the past. In addition, electrical wiring between the power supply unit 51 and the light source unit 21 can be facilitated.

  Moreover, since the radiation fin 622, the light source unit 21, and the power source unit 51 are covered and accommodated by the cover member 60, the number of components can be reduced. Moreover, it is possible to avoid that the power supply unit 51 is exposed to the outside of the embedded lighting device 100. Further, it is possible to omit a sealing member that has been conventionally provided between the power supply unit 51 and the light source unit 21.

  Moreover, the cover material 60 is comprised with the metal which has heat conductivity. As a result, it is possible to efficiently dissipate the heat generated in the light source unit 21, and the embedded lighting device 100 can be miniaturized. Furthermore, the entire cover material 60 including the heat sink 62 is made of aluminum die casting, so that heat can be radiated more efficiently and further miniaturization can be realized.

  The cover member 60 includes an upper cover part 61 and a lower cover part 71, and the upper cover part 61 and the lower cover part 71 are integrally formed. Thereby, it becomes possible to make the embedded lighting apparatus 100 with a reduced number of parts and easy to manufacture. In addition, the space surrounded by the upper cover portion 61 and the lower cover portion 71 can be easily airtight.

  Further, the power supply unit 51 includes a power supply circuit 511, and the power supply circuit 511 is fixed to the upper cover unit 61. Thereby, the heat generated in the power supply unit 51 can be radiated together with the heat generated in the light source unit 21. Further, even if water is generated in the power supply unit accommodating space 641, it is possible to avoid the power supply circuit 511 from being immersed in water.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, the configuration of each part of the embedded lighting fixture is not limited to the configuration of each part in the present embodiment. For example, the shape of the cover material having the upper cover portion and the lower cover portion is not limited to the shape of the cover material 60 in the present embodiment.

DESCRIPTION OF SYMBOLS 21 ... Light source part 51 ... Power supply part 60 ... Cover material 61 ... Upper cover part 71 ... Lower cover part 76 ... Mounting spring 81 ... LED cover 100 ... Embedded lighting fixture 511 ... Power supply circuit 622 ... Radiation fin (radiation part)
C ... Mounted part

Claims (4)

An embedded lighting fixture that is embedded and attached to a mounted portion,
A light source unit;
A power supply for supplying power to the light source;
An embedded luminaire comprising: a heat radiating unit, and a cover material that covers the light source unit and the power source unit in a state where the light source unit and the power source unit are arranged in parallel in a horizontal direction.   The embedded lighting device according to claim 1, wherein the cover material is made of a metal having thermal conductivity. The cover material has an upper cover part and a lower cover part,
The embedded lighting device according to claim 1, wherein the upper cover portion and the lower cover portion are formed integrally with each other. The power supply unit includes a power supply circuit,
The embedded lighting apparatus according to claim 3, wherein the power supply circuit is fixed to the upper cover portion.

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