JP2011003434A - Illumination fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination fixture capable of suppressing function reduction by heat of a lighting device arranged and installed in the fixture body.SOLUTION: This illumination fixture includes: a fixture body 20 having a frame part 21 formed in a rectangular frame shape, a mounting flange 23 installed at the peripheral edge of this frame part 21, and a top plate part 22 installed so as to close one end side of the frame part 21 and having a mounting hole 25 formed in the vicinity of the center part of the frame part 21; a light-emitting module 10 having a light-emitting element 11 and arranged and installed so as to close another end side of the frame part 21 of the fixture body 20; and a lighting device 30 which is in a space C formed by the frame part 21, the top plate part 22, and the light-emitting module 10, which is arranged and installed on the frame part 21 side of the top plate part 22 and which controls lighting of the light-emitting element 11 of the light-emitting module 10.

Description

  The present invention relates to a lighting fixture that can prevent a lighting device disposed in a fixture main body from being degraded by heat.

  In recent years, LED base lights and LED downlights that have the same luminous flux as fixtures using fluorescent lamps have been developed with the increase in output, efficiency, and spread of LEDs.

  LEDs have a longer life than conventional light sources and can reduce the frequency of light source or fixture replacement, which is advantageous in terms of maintenance.

  In addition, since the LED is small, there is a high degree of freedom in optical design, and if the efficiency is further improved, a lighting fixture having a different form from the conventional one can be considered.

  For example, a thin lighting fixture in which a light emitting module and a lighting device are built in a fixture main body is known (see, for example, Patent Document 1).

  However, since the LED has an effect of reducing luminous flux, efficiency, and shortening the life due to heat generated by lighting, it is necessary to adopt an LED heat dissipation structure.

  In addition, the lighting device for lighting the LED has a problem that the temperature rises due to the heat generated by the LED or its own heat, and the desired performance cannot be obtained.

  Therefore, even if the heat radiation of the LED can be performed, the lighting device may not be able to exhibit performance as a fixture due to a temperature rise.

  On the other hand, when the instrument main body is attached with an attachment member such as a suspension bolt and a nut, the top plate of the instrument main body is deformed by tightening the nut.

  At this time, if the lighting device is attached to the top plate portion, a gap is generated between the lighting device and the top plate due to deformation of the top plate.

  For this reason, the amount of heat radiated from the lighting device via the top plate portion decreases, the temperature of the lighting device rises, and the lighting device cannot obtain desired performance.

JP 2009-16095 A

  This invention is made | formed in view of the said subject, and it aims at providing the lighting fixture which can suppress the temperature rise of the lighting device which lights a light emitting module.

  The light emitting module according to claim 1 is provided so as to close a frame portion formed in a rectangular frame shape, a mounting flange provided at a peripheral edge of the frame portion, and one end side of the frame portion. A fixture body having a mounting plate formed in the vicinity of the center portion; and a light emitting module having a light emitting element and arranged to close the other end side of the frame portion of the fixture body; A lighting device that is disposed in a space formed by the frame portion, the top plate portion, and the light emitting module and that is disposed on the frame portion side of the top plate portion and controls lighting of the light emitting elements of the light emitting module; It is characterized by comprising;

  The light emitting element is preferably a light emitting element using a semiconductor as a light source, such as an LED, an organic EL, or a semiconductor laser, but may be other light sources. Moreover, you may comprise so that it may light-emit in white, and according to a use, you may comprise red, blue, green, etc., or combining these.

  The light emitting module is not particularly limited as long as the light emitting module can be built in the instrument body and can close the other end of the frame. For example, the light emitting module may have a configuration such as a substrate and a heat sink in addition to the light emitting element.

  The lighting fixture according to claim 2 is the lighting fixture according to claim 1, wherein a plurality of mounting holes of the top plate portion are provided on a straight line passing through a central portion of the frame portion and parallel to one side of the frame portion, The lighting device is formed in a long shape, and is arranged on the top plate portion so that the longitudinal direction is parallel to one side of the frame portion.

  According to the lighting apparatus of claim 1, since the attachment member such as a bolt is attached to the attachment hole and the top plate is deformed, the lighting device and the top plate can be reliably connected. The temperature rise of the apparatus can be suppressed.

  According to the lighting apparatus of claim 2, since the mounting member such as a bolt is attached to the mounting hole, and the top plate is deformed, the lighting device is disposed at a position where the deformation amount of the top plate is small. Temperature rise can be suppressed.

The top view of the lighting fixture of this invention. It is a side view of the lighting fixture of FIG. It is a rear view of the lighting fixture of this invention. It is sectional drawing which shows the attachment state of the lighting fixture of this invention. It is a rear view of the lighting fixture which concerns on the 2nd Embodiment of this invention.

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

  1 to 4 show a first embodiment of a lighting fixture according to the present invention. FIG. 1 is a plan view of the lighting fixture, FIG. 2 is a side view of the lighting fixture, FIG. 3 is a rear view of the lighting fixture, and FIG. FIG. 3 is a cross-sectional view showing a mounting state of the lighting fixture.

  1 to 4, the lighting fixture 1 has a light emitting module 10 and a fixture main body 20, and the fixture main body 20 is provided so as to close a frame portion 21 formed in a rectangular frame shape and one end side of the frame portion 21. The top plate portion 22 is formed in a square shape in plan view, and the mounting flange 23 is provided on the periphery of the frame portion 21. A plurality of vent holes 24 are provided on the side of the frame portion 21. The top plate portion 22 has a mounting hole 25 in the vicinity of the center portion of the top plate portion 22, a power line insertion hole 26 on the center line passing through the center portion of the top plate portion 22 and parallel to one side of the frame portion 21, and a signal line insertion. A hole 27 is formed. The mounting hole 25 is a Dharma hole having a large diameter portion and a small diameter portion that is smaller than the large diameter portion. A power supply terminal block 28 and a signal line terminal block 29 are disposed on the inner surface side of the top plate portion 22 near the sides of the power supply line insertion hole 26 and the signal line insertion hole 27, respectively.

  The frame portion 21, the top plate portion 22, and the mounting flange 23 are made of aluminum and configured as a single body or a separate body.

  The light-emitting module 10 is formed of a plurality of light-emitting elements 11 made of LEDs, a substrate 12 on which the light-emitting elements 11 are mounted, a substrate 12 and a metal having good thermal conductivity, such as aluminum thermally coupled to the frame portion 21. The heat radiation plate 13 has a reflection surface formed so as to expand from the periphery of each light emitting element 11, and includes a reflection portion 14 disposed on the substrate 12.

  A lighting device 30 that controls lighting of the light emitting element 11 of the light emitting module 10 is attached to the inner surface side of the top plate portion 22 and from one side of the frame portion 21.

  The heat radiating plate 13 has a larger area in plan view than the substrate 12 and is formed in substantially the same shape as the opening of the frame portion 21.

  The light emitting elements 11 are mounted in a matrix at equal distances from each other, and are configured to be able to irradiate light from the other end side of the frame portion 21.

  Note that a material having good thermal conductivity may be interposed between the substrate 12 and the heat radiating plate 13. For example, a copper foil may be formed on the back side of the substrate 12, or the substrate 12 and the heat radiating plate may be radiated. A heat conductive material such as silicon may be disposed between the plate 13 and the plate 13.

  Further, a translucent plate or a translucent diffuser plate such as white may be provided on the front side of the light emitting module 10.

  Thus, the light emitting module 10 is disposed in the frame portion 21 so as to close the other end side of the frame portion 21, and forms a space portion C surrounded by the top plate portion 22, the frame portion 21, and the light emitting module 10. To do.

  The lighting device 30 is disposed in the space portion C, and is attached to the top plate portion 22 by an attaching means such as a screw (not shown) near one side of the frame portion 21. The lighting device 30 is formed in a long shape, and is arranged so that the longitudinal direction of the lighting device 30 and one side of the frame portion 21 are parallel to each other.

  Next, the operation of this embodiment will be described.

  When the luminaire 1 is installed in the embedded hole provided in the ceiling surface, a power line and a signal line (not shown) wired on the back of the ceiling are drawn from the power line insertion hole 26 and the signal line insertion hole 27. Thereafter, attachment means such as bolts 40 and nuts 41 provided on the back of the ceiling are inserted into the attachment holes 25 and temporarily fixed. In this state, when the nut 41 is tightened, the top plate portion 22 is pulled upward, and the instrument body 20 is also lifted upward. When the mounting flange 23 comes into contact with the ceiling surface, the movement of the frame portion 21 stops, and when the nut 41 is tightened, the top plate portion 22 is slightly deformed as shown in FIG. To do.

  Next, the power supply line and the signal line drawn into the fixture main body 20 are connected to the power supply terminal block 28 and the signal line 29, and the light emitting module 10 is attached to the fixture main body 20 by an attachment means (not shown), thereby arranging the lighting fixture 1. Complete.

  When the light emitting module 10 is turned on, the light emitting element 11 is turned on. Here, heat generated in the light emitting element 11 during lighting of the light emitting module 10 is radiated to the space C via the substrate 12 and the heat radiating plate 13. A vent hole 24 is provided on the side surface of the frame portion 21, and the heat of the space C can be released to the outside.

  Further, although the lighting device 30 itself generates heat, since it is attached to the top plate portion 22, the heat of the lighting device 30 can be radiated to the outside via the top plate portion 22.

  However, the space portion C has the frame portion 21 closed at both ends by the top plate portion 22 and the light emitting module 10, and the heat generated by the light emitting module 10 and the lighting device 30 is easy to burn, and the space portion C is arranged in this space C. The lighting device 30 provided tends to rise in temperature. By the way, the lighting device 30 cannot perform a desired function when the temperature is higher than a predetermined temperature. Then, in order to ensure the function of the lighting device 30, it can be considered that the size of the space C is expanded and the temperature rise is suppressed, but there arises a problem that the entire apparatus becomes large.

  That is, in order to realize the lighting fixture 1 in which the fixture body 20 is thinned, it is a problem to suppress the temperature rise of the lighting device 30.

  As a result of studying to solve the above problems, the inventor of the present application has a correlation between the mounting position of the lighting device 30 and the temperature rise of the lighting device 30, and by isolating the lighting device 30 from the mounting hole 25. It has been found that the temperature rise of the lighting device 30 can be suppressed.

  That is, although the lighting device 30 is attached to the top plate portion 22, the top plate portion 22 is deformed when the instrument main body 22 is disposed in the ceiling embedding hole, and therefore, between the lighting device 30 and the top plate portion 22. A slight gap occurs. It has been found that the heat conduction from the lighting device 30 to the top plate portion 22 is reduced by this gap, which causes the temperature of the lighting device 30 to rise.

  Further, the deformation amount of the top plate portion 22 is the largest in the vicinity of the mounting hole, and decreases as it goes to the frame portion 21 side. For this reason, if the lighting device 30 is disposed far from the mounting hole and on the frame portion 21 side, the influence of the deformation of the top plate portion 22 is reduced, and a gap formed between the lighting device 30 and the top plate portion 22 is reduced. It is considered that the temperature rise of the lighting device 30 can be suppressed. For example, if the lighting device 30 is disposed at a distance of 120 mm or more from the mounting hole 25 in an instrument having a square top plate portion 22 having a side of about 400 mm, the temperature rise can be suppressed.

  In the present embodiment, since the mounting hole 25 is provided in the center of the top plate portion 22 and the lighting device 30 is disposed on the frame portion 21 side with respect to the mounting hole 25, the influence of the deformation of the top plate portion 22 is small and the lighting is performed. The temperature rise of the device 30 can be suppressed.

  In addition, since the lighting device 30 is formed in a long shape and is disposed along one side of the frame portion 21, the lighting device 30 functions as a reinforcing material for the top plate portion 22. Deformation can be suppressed.

  Further, since the power supply terminal block 28 and the signal line terminal block 29 are disposed in the vicinity of the power supply line insertion hole 26 and the signal line insertion hole 27, respectively, the connection between the power supply line and the signal line drawn into the instrument body is possible. Work becomes easy and connection can be made easy.

  Next, 2nd Embodiment of the lighting fixture which concerns on this invention is described using FIG.

  Since the second embodiment is the same as the first embodiment except that two mounting holes 25 are provided, the same components are denoted by the same reference numerals and description thereof is omitted.

  In the second embodiment, mounting holes 25 are formed at predetermined intervals in a top plate portion 22 on a straight line that passes through the center portion of the frame portion 21 and is parallel to one side of the frame portion 21.

  Further, the lighting device 30 is formed in a long shape, and is disposed on the top plate portion 22 so that the longitudinal direction is parallel to one side of the frame portion 21.

  That is, even when there are a plurality of mounting holes 25, the gap formed between the lighting device 30 and the top plate portion 22 can be reduced by disposing the lighting device 30 closer to the frame portion 21 than the mounting hole 25. And the temperature rise of the lighting device 30 can be suppressed. Thus, even if the number of mounting holes 25 is two or more, the same effect can be obtained.

  In addition, in 1st and 2nd embodiment, although the square-shaped light emitting module 10 and the lighting fixture 1 were demonstrated, each external shape is not specifically limited, For example, it is a round shape or a polygonal thing. Also good.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Lighting fixture, 10 ... Light emitting module, 20 ... Appliance main body, 21 ... Frame part, 22 ... Top plate part, 23 ... Mounting flange, 25 ... Mounting hole, 30 ... Lighting apparatus, C ... Space part

Claims (2)

A frame portion formed in a rectangular frame shape, a mounting flange provided at the periphery of the frame portion, and a mounting hole provided so as to close one end side of the frame portion and formed near the center of the frame portion A top plate having a tool body,
A light emitting module having a light emitting element and disposed so as to close the other end of the frame portion of the instrument body;
A lighting device that is disposed in a space formed by the frame portion, the top plate portion, and the light emitting module and that is disposed on the frame portion side of the top plate portion, and controls lighting of the light emitting elements of the light emitting module;
The lighting fixture characterized by comprising. A plurality of mounting holes in the top plate portion are provided on a straight line that passes through the central portion of the frame portion and parallel to one side of the frame portion, the lighting device is formed in a long shape, and the longitudinal direction is The lighting fixture according to claim 1, wherein the lighting fixture is disposed on the top plate portion so as to be parallel to one side of the frame portion.

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