JP2014112489A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve miniaturization and improvement in heat radiation.SOLUTION: A protrusion 23 is protrusively formed on an inner bottom surface of a storage part 20 for storing a lighting device 9, and a plurality of protrusive strip parts 24 are provided for connecting the protrusion 23 and a peripheral wall part of the storage part 20. Therefore, improvement in heat radiation can be achieved as heat radiated by an LED module 1 can be conducted to a whole fixture body 2 efficiently from the protrusion 23 via the protrusive strip parts 24. Furthermore, as the lighting device 9 is stored in the storage part 20 provided at the fixture body 2, compared to a structure in which the lighting device 9 is arranged outside the fixture body 2, miniaturization of the whole lighting fixture can be achieved.

Description

  The present invention relates to a lighting fixture, and more particularly to a lighting fixture that uses a light emitting diode as a light source.

  In recent years, lighting fixtures using light-emitting diodes (LEDs) as light sources instead of fluorescent lamps and incandescent lamps (hereinafter referred to as LED lighting fixtures) have been rapidly spreading. In LED lighting fixtures, it is necessary to efficiently dissipate the heat generated by the LED in order to suppress deterioration due to temperature rise of the LED and reduction in light emission efficiency.

  For example, the conventional LED lighting apparatus shown in FIG. 5 is a downlight embedded in an embedding hole provided in the ceiling. By providing a large number of radiating fins 101 on an apparatus body 100 made of aluminum die casting. The heat dissipation is improved. Further, in this conventional example, a lighting device (not shown) for lighting the LED is attached to a mounting plate (not shown) extending from the fixture body 100, and the influence of heat generated by the LED hardly affects the lighting device. It is.

  Another conventional example is an LED lighting device (downlight) shown in FIG. 6 (see, for example, Patent Document 1). In this conventional example, in order to save space, the instrument body 200 is formed in a cylindrical shape, and a lighting device (not shown) is accommodated in the internal space.

JP 2011-175787 A

  By the way, in the case of an LED lighting fixture, the circuit components (for example, the electrolytic capacitor for smoothing) which comprise a lighting device have a much shorter lifetime compared with LED which is a light source. In addition, as in the latter conventional example shown in FIG. 6, when the lighting device is housed in the fixture body 200, the influence of heat on the circuit components is higher than that of the heat generated by the lighting device itself. The influence of is greater. Therefore, in the LED lighting fixture which incorporates the lighting device in the fixture main body, it is required to dissipate the heat generated by the LED more efficiently.

  The present invention has been made in view of the above problems, and aims to reduce the size and improve heat dissipation.

  The luminaire of the present invention includes an LED module serving as a light source, a lighting device that supplies power to the LED module to light it, a storage unit that stores the lighting device, and a holding unit that holds the LED module. The storage portion is formed in a bottomed cylindrical shape with one surface open, the holding portion is provided on a bottom portion outside the storage portion, and the storage portion is further inward from the bottom portion. And a plurality of ridges connecting the protrusion and the peripheral wall portion.

  In this lighting fixture, it is preferable that the fixture main body has a support portion that supports the lighting device apart from the protrusion and the protrusion in the depth direction of the storage portion.

  In the lighting fixture of the present invention, the lighting device is stored in a storage portion provided in the fixture body, and further, a protrusion is provided on the inner bottom surface of the storage portion for storing the lighting device, and the protrusion and the peripheral wall portion of the storage portion are provided. Since a plurality of connecting ridges are provided, the overall lighting fixture can be reduced in size compared to a structure in which the lighting device is arranged outside the fixture main body, and the heat generated by the LED module is further increased. Thus, there is an effect that heat can be improved by efficiently conducting the entire device body through the protruding portion.

It is the disassembled perspective view which abbreviate | omitted partially which shows embodiment of the lighting fixture which concerns on this invention. It is a perspective view same as the above. It is sectional drawing abbreviate | omitted partially same as the above. It is the perspective view which abbreviate | omitted a part same as the above. It is the perspective view which a part of conventional example abbreviate | omitted. It is the perspective view which abbreviate | omitted a part of another prior art example.

  Hereinafter, with reference to FIGS. 1-4, embodiment of the lighting fixture (LED lighting fixture) which concerns on this invention is described in detail. In the following description, the front, rear, left, right and up directions are defined in FIG.

  This embodiment is classified as a spotlight or a projector. However, the lighting fixture to which the technical idea of the present invention is applicable is not limited to the spotlight and the projector.

  The present embodiment includes an LED module 1, an instrument body 2, a cover 3, a reflector 4, a panel 5, a packing 6, a panel press 7, a mounting arm 8, a lighting device 9, and the like.

  The LED module 1 has one or more LED chips mounted on the front surface of a rectangular ceramic substrate. These LED chips are sealed with a synthetic resin sealing member having translucency and mixed with a fluorescent material. That is, a part of the light emitted from the LED chip (for example, blue light) is wavelength-converted with a fluorescent material, and the wavelength-converted light (for example, yellow light) and the light that has not been wavelength-converted (blue light) are mixed. As a result, the light emitted from the LED module 1 becomes white light as a whole.

  The instrument body 2 is formed by integrally forming a storage part 20, a holding part 21, a frame part 22, a mounting base 25, and the like by aluminum die casting. The storage unit 20 is formed in a bottomed cylindrical shape having an open rear end, and a large number of heat radiation fins 200 are provided at equal intervals in the front-rear direction on the outer peripheral surface thereof. The mounting base 25 is formed in a rectangular tube shape with an open rear end. However, there is no wall between the storage unit 20 and the mounting base 25, and both are connected on the opening surface (rear end surface) and inside (see FIG. 1).

  A cylindrical protrusion 23 is provided at the center of the bottom of the storage part 20. In addition, a plurality of (six in the illustrated example) ridges 24 projecting from the bottom of the storage unit 20 are provided to connect the projections 23 and the peripheral wall. That is, the protrusion 23 is thermally coupled to the peripheral wall of the storage portion 20 by the plurality of protrusions 24.

  Further, a plurality of (four in the illustrated example) support portions 26 project from the vicinity of the peripheral wall inside the storage portion 20. Inside these support portions 26, screw holes 260 whose rear end surfaces are open are formed in the front-rear direction.

  The holding portion 21 is formed in a rectangular tube shape that protrudes forward from the front surface of the bottom portion of the storage portion 20, and the LED module 1 is screwed and held on the inner bottom surface thereof. However, an insulating sheet (not shown) made of a material having relatively high thermal conductivity and electrical insulation is interposed between the inner bottom surface of the holding portion 21 and the LED module 1. . In addition, since the holding | maintenance part 21 is formed in the approximate center of the bottom part front surface, the area | region where the LED module 1 exists, and the protrusion 23 have overlapped seeing from the front-back direction.

  The frame portion 22 has a truncated cone shape that protrudes forward from the peripheral edge on the front surface side of the storage portion 20, and has an open front surface and a hollow interior. The reflecting plate 4 is accommodated in the frame portion 22. The reflecting plate 4 is formed in a truncated cone shape that opens forward and backward by processing a metal plate. The reflector 4 is attached to the instrument body 2 by sandwiching the peripheral edge of the front end together with the panel 5 between the front end edge of the frame portion 22 and the panel presser 7. At this time, the LED module 1 is disposed in the opening on the rear end side of the reflection plate 4 attached to the instrument body 2. That is, the reflection plate 4 reflects a part of the light emitted from the LED module 1 on the inner peripheral surface (reflection surface) so that the light distribution of the light (illumination light) becomes a narrow-angle light distribution. I have control.

  The panel 5 is formed in a disk shape with a glass plate or a plate material of a translucent material such as an acrylic resin or a polycarbonate resin. The panel retainer 7 is formed in an annular shape from a metal material, and is fixed to the front end of the frame portion 22 by screwing. In addition, since this embodiment may be used outdoors, in order to prevent foreign materials, such as rain water and dust, from entering into the reflecting plate 4 and the frame part 22, the clearance gap between the frame part 22 and the panel presser 7 is used. Is closed with packing 6.

  The lighting device 9 includes a lighting circuit (not shown) (for example, a power conversion circuit that converts AC input power into DC power) and a metal case 90 that houses the lighting circuit. The case 90 is formed in a rectangular box shape, and mounting pieces 91 project from the front end edges on both the upper and lower sides. Each attachment piece 91 has a screw insertion hole (not shown) passing through both ends in the left-right direction. The lower mounting piece 91 is integrally formed with a support piece 92 that protrudes forward from the lower edge.

  Thus, the lighting device 9 is attached to the instrument body 2 by screwing the attachment screws 93 inserted into the screw insertion holes of the attachment pieces 91 into the screw holes 260 of the support portions 26 of the storage portion 20. At this time, deformation of the mounting piece 91 and the like are suppressed by the tip of the support piece 92 coming into contact with the inner bottom surface of the storage unit 20. In addition, since the height dimension (length dimension in the front-rear direction) of the support part 26 is larger than the height dimension of the protrusion 23 and the protrusion 24, in the depth direction (front-rear direction) of the storage part 20. The lighting device 9 is supported while being separated from the protrusion 23 and the protrusion 24.

  The mounting arm 8 is formed by integrally forming a pair of arm pieces 80 and a fixed piece 81 by bending a metal plate such as a steel plate. The arm piece 80 is bent upward from the left and right ends of the fixed piece 81, and a bolt insertion hole (not shown) passes through the tip of each arm piece 80. That is, the bolts 82 inserted into the bolt insertion holes are inserted into the mounting base 25 through through holes (not shown) penetrating the left and right walls of the mounting base 25, and the nuts 83 are tightened to the bolts 82. Thus, each arm piece 80 is attached to the mounting base 25 of the instrument body 2.

  On the other hand, the fixing piece 81 is formed with a circular screw insertion hole 810 through which a fixing screw (not shown) is inserted, and a semicircular arc-shaped through groove 811 centering on the screw insertion hole 810. . That is, the fixing piece 81 is fixed to a construction (wall, ceiling, foundation, etc.) with screws inserted through the screw insertion hole 810 and the through groove 811 respectively. Further, the irradiation direction can be changed by rotating the fixing piece 8 along the through groove 811.

  The cover 3 closes the rear end surface of the instrument body 2 and is formed in a shape in which a disc-shaped portion corresponding to the storage portion 20 and a trapezoidal portion corresponding to the mounting base 25 are combined. Yes. A plurality (five in the illustrated example) of screw insertion holes penetrates the cover 3. That is, the instrument body 2 is covered by covering the rear end face of the instrument body 2 and screwing the screws 30 inserted into the respective screw insertion holes into the plurality of screw holes provided in the rear end face of the instrument body 2. The cover 3 can be attached to. However, a waterproof packing (not shown) is also interposed between the rear end surface of the instrument body 2 and the cover 3.

  As described above, in the present embodiment, the protrusions 23 project from the inner bottom surface of the storage unit 20 that stores the lighting device 9, and a plurality of protrusions 24 that connect the protrusions 23 and the peripheral wall portion of the storage unit 20 are provided. Is provided. For this reason, the heat | fever which the LED module 1 emits can be efficiently conducted from the protrusion part 23 to the instrument main body 2 whole via the protrusion part 24, and the improvement of heat dissipation can be aimed at. In addition, since the lighting device 9 is stored in the storage unit 20 provided in the fixture body 2, the overall lighting fixture can be reduced in size as compared with the structure in which the lighting device 9 is disposed outside the fixture body 2. Can do.

  Furthermore, in this embodiment, since the lighting device 9 is separated from the protrusion 23 and the protrusion 24 in the storage unit 20, the influence of heat generated by the LED module 1 on the lighting device 9 can be reduced. it can.

1 LED module 2 Appliance body 9 Lighting device
20 compartment
21 Holding part
23 Projection
24 ridge

Claims (2)

  An LED module serving as a light source; a lighting device that supplies power to the LED module to light it; a storage unit that stores the lighting device; and an appliance body that has a holding unit that holds the LED module; Is formed in a bottomed cylindrical shape with one open surface, the holding portion is provided on the bottom portion outside the storage portion, and the storage portion protrudes inward from the bottom portion. And a plurality of ridges connecting the protrusion and the peripheral wall portion.   The lighting fixture according to claim 1, wherein the fixture main body includes a support portion that supports the lighting device in a depth direction of the storage portion so as to be spaced apart from the projection and the protrusion.

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