JP2013164988A - Led lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lighting fixture with an improved radiation effect of LEDs, protecting a heat radiation part and electric components, and with improved appearance quality after mounting.SOLUTION: An LED lighting fixture 1 is provided with a plurality of LEDs 21 as light sources, a cover 22, a substrate 23 mounting the LEDs 21, a heat radiation portion 24 integrally attached to a rear face of the substrate 23, a fixture body 31, protruded parts 32 protruded from a rear part 31a of the fixture body 31, and a top plate 33 fixed to tips of the protruded parts 32. An outer periphery of the heat radiation portion 24 is surrounded by the protruded parts 32 and the top plate 33.

Description

  The present invention relates to an LED lighting apparatus including a plurality of light emitting diodes (LEDs) and a heat dissipation unit.

  An example of a conventional LED lighting apparatus will be described with reference to FIG. 4 (see Patent Document 1).

  As shown in FIG. 4, the LED lighting apparatus 101 includes an LED lamp 210 that can be attached to and detached from the heat conduction unit 124. The heat conducting unit 124 is provided with a plurality of heat conducting fins 124a. In addition, a screen 133 made of metal is attached to the heat conducting unit 124 to cover the heat conducting unit 124. This screen 133 provides protection against accidental contact with the heat transfer unit 124 while allowing free circulation of air. It is disclosed that the LED luminaire 101 can be mounted to a wall, ceiling, column, or other fixed location via a mounting bracket 134 that is pivotally fixed to the heat transfer unit 124.

Special table 2008-518423

  By the way, in the conventional LED lighting fixture 101, the screen 133 for protecting the heat conduction unit 124 is provided, but the heat conduction unit 124 is exposed in the room. In this state, when the LED lighting apparatus 101 is attached, the appearance quality and appearance of the LED lighting apparatus 101 are not good. Moreover, although the LED lighting fixture 101 is equipped with the electrical component for electrically connecting with a commercial power supply (AC), there existed a fault that it was dangerous to place in the arbitrary places in a room | chamber interior.

  This invention is made | formed in view of the said reason, The objective is providing the LED lighting fixture which improved the thermal radiation effect of LED, protected the thermal radiation part and the electrical component, and improved the external appearance quality after attachment. There is.

  The LED lighting apparatus of the present invention is an LED lighting apparatus provided with a plurality of LEDs and a heat radiating portion, and a substrate on which the plurality of LEDs are mounted, and the heat radiating portion integrally attached to the back surface of the substrate. An instrument body to which the substrate and the heat radiating part are detachably attached, a projecting part projecting from a rear part of the instrument body, and a top plate fixed to a tip of the projecting part, the projecting part and the The top plate surrounds the heat radiating portion.

  In the LED lighting apparatus of the present invention, the protruding portion and the top plate are arranged apart from the outer periphery of the heat radiating portion.

  In the LED lighting apparatus of the present invention, the protruding portion is formed so as to partially cover the outer periphery of the heat radiating portion.

  In the LED lighting device of the present invention, an electrical component is attached to the top plate.

  According to the present invention, since the heat radiating part is arranged at the rear part of the appliance main body, the heat released from the LED can be directly radiated into the ceiling, the wall, or the floor under the heat radiating part. And the efficient heat dissipation of LED lighting fixtures is attained, and the efficiency and lifetime of LED can be improved. Further, the outer periphery of the heat radiating portion is surrounded by the protruding portion and the top plate. Thereby, the heat insulating material, the VA wire, the construction material, or the like in the ceiling, the wall, or under the floor is prevented from coming into direct contact with the heat radiating portion, and the heat radiation from the heat radiating portion is not hindered. In particular, the top plate can prevent the heat insulating material, the VA wire, and the like from being caused by its own weight and interfere with the heat radiating portion, and can protect the heat radiating portion from rain leakage, dust, and the like. Furthermore, in the construction of the LED lighting apparatus, the replacement of the illumination part, etc., the installation space for the heat radiating part is constantly secured, so that the workability is improved.

The attachment perspective view which shows one Embodiment of the LED lighting fixture which concerns on this invention The LED lighting fixture which concerns on this invention is shown, (a) is sectional drawing, (b) is a front view. The LED lighting fixture which concerns on this invention is shown, (a) is sectional drawing of a modification, (b) is sectional drawing of another modification. The conventional LED lighting fixture is shown, (a) is a perspective view, (b) is a perspective view of another Example.

  Hereinafter, suitable embodiment of the LED lighting fixture which concerns on this invention is described in full detail based on FIGS. 1-3.

  Based on FIG. 1 and FIG. 2, the whole structure of one Embodiment in the LED lighting fixture of this invention is demonstrated.

  The LED lighting device 1 includes an illumination unit 20 and a device unit 30. The illumination unit 20 includes a plurality of LEDs 21 that are light sources, a cover 22, a substrate 23 on which the LEDs 21 are mounted, and a heat dissipation unit 24 that is integrally attached to the back surface of the substrate 23. The instrument unit 30 includes an instrument body 31, a projecting part 32 projecting from the rear part 31 a of the instrument body 31, and a top plate 33 fixed to the tip of the projecting part 32. In addition, the fixture 30 is provided with a mounting bracket 34 for attaching the LED lighting fixture 1 to an opening 41 formed in the ceiling 40 or the like in the room. Furthermore, an electrical component 50 is attached to the rear portion 31 a of the instrument body 31. The electrical component 50 is a connector 51, a cord 52, a power supply device 53, or the like.

  The plurality of LEDs 21 are mounted on the substrate 23 and modularized. For example, a COB (Chip on Board) module in which LED elements are directly mounted on a pattern on the substrate 23 and sealed with a resin. The LED 21 may be, for example, a white LED, and may be a red LED, a green LED, or the like without being limited to a white light emission color. The quantity of the LEDs 21 can be appropriately set according to the specifications of the LED lighting apparatus 1.

  The cover 22 is made of a translucent member, and a lens step 22a for condensing or diffusing the light emitted from the LED 21 is formed at a position corresponding to the LED 21. The translucent member is, for example, a synthetic resin having excellent optical characteristics such as acrylic or polycarbonate. In addition, a plurality of holes 22 b for attaching the cover 22, the substrate 23, and the heat radiating part 24 to the instrument body 31 with screws 60 are provided on the outer periphery of the cover 22. The modularization described above may include the cover 22.

  As the substrate 23, for example, a metal plate such as aluminum having high thermal conductivity can be used, and a circuit for mounting the LED 21 is formed on an insulating film coated on the metal plate. The circuit is, for example, a metal film such as titanium (Ti), gold (Au), or copper (Cu), and is electrically connected to the LED 21. By using such a board | substrate 23, the heat_generation | fever from LED21 can be efficiently conducted to the thermal radiation part 24, and the thermal radiation characteristic of LED21 can be improved.

  The heat radiating portion 24 is made of a member having excellent heat radiating properties (high thermal conductivity), for example, a metal such as aluminum, and is provided with a plurality of heat radiating fins 24a having a substantially square cross section. The radiating fins 24a are arranged substantially in parallel, but may be arranged radially. Moreover, although the cross section is a substantially quadrangular shape, a wave shape may be sufficient. When the heat radiating part 24 is made of an aluminum material, it is formed by a die casting method.

  The instrument body 31 is formed using a member having excellent heat dissipation, such as aluminum. When an aluminum material is used for the instrument main body 31, die casting can be used as a method for forming the instrument main body 31. The instrument body 31 has a substantially cylindrical outer shape, and a plurality of screw holes 31c are formed on the bottom 31b (the side on which the illumination unit 20 is attached).

  The protruding portion 32 protruding from the rear portion 31a of the instrument body 31 is made of a metal such as aluminum having heat dissipation properties, and is preferably formed integrally with the instrument body 31. If the protrusion 32 is a synthetic resin, it may be formed separately from the instrument body 31. Further, the top plate 33 fixed to the tip of the protruding portion 32 is also formed of heat-radiating aluminum or the like, but may be made of synthetic resin. In the embodiment of the present invention, the top plate 33 has a substantially flat plate shape, but is not particularly limited to the shape of this embodiment.

  The tip of the screw 60 is fastened to a screw hole 31 c formed in the instrument body 31, whereby the illumination unit 20 and the instrument unit 30 are integrated. And since it is the attachment by the screw | thread 60, while the illumination part 20 and the instrument part 30 are the firm fastening, they can be attached or detached. The illumination part 20 and the instrument part 30 are integrated, and the heat radiating part 24 is exposed from the rear part 31a of the instrument body 31. The rear portion 31a is a portion opposite to the bottom portion 31b in which the screw hole 31c is formed in the instrument main body 31, and is a portion embedded in the ceiling, the wall, or under the floor.

  The LED lighting apparatus 1 of the present invention is an LED lighting apparatus 1 that is attached to an indoor ceiling, wall, or the like, and most of the apparatus main body 31 is embedded in the ceiling, wall, or under the floor. In other words, the heat radiating part 24 starts in the ceiling, wall, or under the floor. And the board | substrate 23 and the thermal radiation part 24 have couple | bonded together. With this configuration, the heat released from the LED 21 can be directly radiated into the ceiling, the wall, or the floor via the heat radiating portion 24. The LED luminaire 1 can efficiently dissipate heat, and the efficiency and life of the LED 21 can be improved.

  In addition, the outer periphery of the heat radiating part 24 is surrounded by the protruding part 32 and the top plate 33. That is, the outer periphery of the heat radiating part 24 is covered with the protruding part 32, and the upper part of the heat radiating part 24 is covered with the top plate 33.

  With this arrangement configuration, it is possible to prevent a heat insulating material, a VA wire, a construction material, or the like in the ceiling, the wall, or under the floor from coming into direct contact with the heat radiating portion 24, and heat radiation from the heat radiating portion 24 is not hindered. . In particular, the top plate 33 prevents the heat insulating material, the VA line, and the like from interfering with the heat radiating portion 24 due to its own weight. Moreover, it becomes possible to protect the thermal radiation part 24 from rain leak, dust, etc. Furthermore, in the construction of the LED lighting apparatus 1 and the replacement of the lighting unit 20, the work space is improved because the mounting space for the heat radiating unit 24 is ensured.

  The projecting portion 32 and the top plate 33 surround the outer periphery of the heat radiating portion 24, but are separated without contacting the outer periphery of the heat radiating portion 24.

  With this configuration, a heat air passage is ensured, and heat can be radiated directly into the ceiling, wall, or under the floor without hindering heat release from the heat radiating portion 24, thereby enabling efficient heat radiation.

  Further, the protruding portion 32 partially covers the outer periphery of the heat radiating portion 24. The protruding portion 32 according to the embodiment of the present invention is substantially circular, but may be rectangular as long as the heat radiating portion 24 can be protected from a heat insulating material or the like, and may be flat or columnar.

  Thus, heat is not trapped in the protruding portion 32, and the heat release in the outer circumferential direction of the heat radiating portion 24 is improved. Since air flows in a direction perpendicular to the ceiling surface and under the floor in the ceiling and under the floor, efficient heat dissipation can be performed using this flow. Further, heat can be radiated upward in the wall, and efficient heat radiation can be achieved.

  Although the external shape of the LED lighting fixture 1 in one Embodiment of this invention has comprised the substantially cylindrical shape, rectangular shape may be sufficient and it is not limited to an external shape in particular.

  Next, the modification of the LED lighting fixture 1 of this invention is demonstrated using FIG. The description of the same configuration as in FIGS. 1 and 2 is omitted.

  In FIG. 3A, a circuit unit 70 for controlling the lighting of the LED 21 is disposed in the heat dissipation unit 24. The circuit unit 70 includes an AC-DC converter, a lighting circuit, and the like. By disposing the circuit unit 70 in the heat radiating unit 24, the heat generated from the circuit unit 70 can be efficiently radiated. Further, the LED lighting apparatus 1 can be made compact.

  In both FIGS. 3A and 3B, the electric component 50 is attached to the top plate 33. The top plate 33 is formed so as to extend slightly from the side (right side in FIG. 3) compared to FIG. In FIG. 3A, the power supply device 53 is attached to the top plate 33, and in FIG. 3B, the cord 52 is attached to the top plate 33.

  As a result, the electrical component 50 arranged in the ceiling, wall, or under the floor is not interfered with by the heat insulating material, VA wire, construction material, etc. It can be done smoothly. Moreover, since it can prevent previously that the electrical component 50 contacts the thermal radiation part 24, efficient thermal radiation becomes possible. Further, the electrical component 50 is safe because it is embedded in the ceiling, wall, or under the floor. In the LED lighting device 1 of the present invention, the heat radiation part 24, the electrical component 50, and the like are embedded in the ceiling, the wall, or the floor, so that the appearance quality after the LED lighting device 1 is attached is also good.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

1: LED lighting device 20: lighting unit 21: LED
22: Cover 23: Substrate 24: Heat radiation part 30: Instrument part 31: Instrument body 32: Projection part 33: Top plate

Claims (4)

An LED lighting apparatus having a plurality of LEDs and a heat dissipation part,
A substrate on which the plurality of LEDs are mounted;
The heat dissipating part integrally attached to the back surface of the substrate;
An instrument body to which the substrate and the heat radiating part are detachably attached,
A protrusion protruding from the rear of the instrument body;
A top plate fixed to the tip of the protrusion,
The LED lighting fixture with which the said protrusion part and the said top plate surround the said thermal radiation part. The LED lighting apparatus according to claim 1,
The LED lighting fixture with which the said protrusion part and the said top plate are spaced apart from the outer periphery of the said thermal radiation part. The LED lighting apparatus according to claim 1 or 2,
The protruding portion is an LED lighting device formed so as to partially cover the outer periphery of the heat radiating portion. The LED lighting apparatus according to any one of claims 1 to 3,
An LED lighting apparatus in which electrical components are attached to the top plate.

Images