JP2010010087A - Luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a luminaire constructed to be superior in heat dissipation and to be resistant to deformation when carried. <P>SOLUTION: The luminaire comprises a reflecting plate 10 having a rectangular planar shape and comprising a long thick portion 11 and long thin portions 12 ranging from two long sides of the thick portion 11, a LED substrate 20 having a plurality of LEDs 21 mounted side by side, and arranged on the surface of the thick portion 11 of the reflecting plate 10 with its longitudinal direction along the longitudinal direction of the reflecting plate 10, and a body 30 provided on the reverse side of the thick portion 11 of the reflecting plate 10, and incorporating a control device 50 including a lighting circuit for lighting the LEDs 21. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a luminaire constructed using LEDs.

  Conventional lighting fixtures configured using LEDs are provided with LED light emitters in a long shape, and those provided in the gap between adjacent ceiling plates stretched on the ceiling are known ( Patent Document 1).

On the other hand, recently, there are many requests for lighting fixtures using LEDs having an appearance resembling the shape of conventional fluorescent lighting fixtures, and the development of lighting fixtures that meet this demand is urgent.
JP 2008-66043 A

  The present invention has been made to meet the above demands, and its purpose is to provide a lighting fixture having an appearance resembling the shape of a conventional fluorescent lamp lighting fixture and excellent in heat dissipation. is there. Furthermore, it aims at providing the lighting fixture which has a structure strong against a deformation | transformation also in the case of carrying.

  The lighting apparatus according to the present invention has a rectangular planar shape, and includes a long thick part and a long thin part connected to two long sides of the thick part, respectively. A plurality of LEDs arranged side by side and mounted on the surface of the thick part of the reflector, the LED substrate being disposed with the longitudinal direction along the longitudinal direction of the reflector; and in the thick part of the reflector And a main body including a control device including a lighting circuit that is provided on the back surface and that turns on the LED.

  From the viewpoint of strength and the like, it is preferable that the reflecting plate is formed with a thick portion and a thin portion. One or more LED substrates are arranged. The reflecting plate is preferably made of a light metal such as aluminum in consideration of heat dissipation. The LEDs may be arranged in a straight line, but may be arranged in a staggered pattern. The control device is allowed to include a dimming circuit.

  In the luminaire according to the present invention, at least the front or back surface of the thin portion of the reflector is a surface that is uneven in the width direction, and a plurality of grooves formed by the unevenness are formed in the longitudinal direction of the reflector. It has a surface.

  In the luminaire according to the present invention, the thin side of the reflector has a short side with a bow shape, and when the main body is attached to the ceiling, a shape in which a gap is generated between the long edge of the reflector and the ceiling A reflection plate is formed on the substrate.

  The bow shape may be any shape as long as the cross-sectional shape from the short side direction of the reflector is curved as a whole. In the bow shape, it is desirable that the long side of the thin portion is above the thick portion in consideration of the volume of dust and the like.

  According to the lighting fixture of the present invention, the main body containing the control unit including the LED and the lighting circuit for lighting the LED is provided in the thick part, and the thin part is continuously provided in the thick part. The heat received from the heat generation source in the thick part is transferred to the thin part and heat dissipation occurs in the thin part, so that heat can be efficiently radiated.

  According to the lighting fixture of the present invention, at least the front or back surface of the thin portion of the reflector is a surface that is uneven in the width direction, and a plurality of grooves formed by the unevenness are formed on the surface formed in the longitudinal direction. Therefore, it is difficult to bend in a direction perpendicular to the groove, and the strength is high, which is advantageous for carrying and the like, and deformation of the reflecting plate in the longitudinal direction can be suppressed. Further, the surface area is substantially widened by the unevenness, and heat can be efficiently radiated.

  According to the lighting fixture of the present invention, since the short side of the thin part of the reflecting plate has a bow shape, the area of the thin part becomes larger than that of a straight line, and heat can be efficiently radiated. Furthermore, since the reflecting plate is formed in a shape that creates a gap between the ceilings, even if the air between the reflecting plate and the ceiling is warmed, it flows out through the gaps, and there is an advantage that the heat radiation effect is high.

  Embodiments of a lighting fixture according to the present invention will be described below with reference to the accompanying drawings. In each figure, the same components are denoted by the same reference numerals, and redundant description is omitted. About the lighting fixture which concerns on an Example, the perspective view which shows the whole visually observed from the downward direction is FIG. 1, the perspective view which expands and shows the principal part visually observed from the downward direction is FIG. 2, and the short side direction of a lighting fixture FIG. 3 is a side view of a partial cross section viewed from the side, and FIG. 4 is a side view of a main part viewed from the long side direction of the lighting fixture.

  The luminaire includes the reflector 10, the LED board 20, and the main body 30 as main components. The reflecting plate 10 has a rectangular planar shape, and includes a long thick portion 11 and a long thin portion 12 connected to the two long sides of the thick portion 11. The thick portion 11 and the thin portion 12 are made of a single piece of aluminum.

  On the surface of the thin portion 12 of the reflecting plate 10, an uneven surface 13 that is uneven in the width direction is formed, and a plurality of grooves 14 due to the unevenness are formed in the longitudinal direction. The short side of the thin portion 12 of the reflector 10 has an arcuate portion U.

  A groove 16 is formed in the lateral direction in a region equidistant from the two long sides 15 of the reflector 10 whose longitudinal direction is horizontal. An LED substrate 20 is provided in the groove 16. One LED substrate 20 is a long substrate of about 300 to 350 mm, for example, and a plurality of the long substrates are arranged side by side and fixed to the reflecting plate 10 with screws 41.

  Here, a plurality of LEDs 21 are mounted on the LED substrate 20 in a straight line. A power supply line for supplying power to the LED 21 is wired on the LED substrate 20. Further, an end that is a short side of the LED substrate 20 is provided with a contact for connecting the power supply line of the adjacent LED substrate 20, and a plurality of LED substrates 20 are arranged side by side to connect a plurality of contacts. LEDs can be connected in series, for example. However, every time the number of the LEDs 21 becomes a predetermined number, the power supply line is not connected, and the main body on the rear surface side is connected through a hole in which a predetermined number of LEDs are connected in series and the power supply lines at both ends are formed in the groove 16. 30.

  Spacers 17 are fitted to both ends of the groove of the reflecting plate 10, and a chassis 31 of the main body 30 on the back surface is fixed by mounting screws 18. A control device 50 including a lighting circuit for lighting the LEDs 21 is built in the chassis 31.

  On the ceiling 60 side of the chassis 31 is a chassis upper lid 32, and several cushions 33 having elasticity are provided outside the chassis upper lid 32, and the chassis 31 is fixed to the ceiling 60 with fixing screws that penetrate the cushion 33. Is done.

  The bow-shaped portion U of the reflector 10 extends upward from the flat base B upward and at an angle of about 10 degrees to 20 degrees while being curved upward, and the long edge 19 of the reflector 10 The reflecting plate 10 is formed in a shape in which a gap S is generated between the ceilings 60. Of course, the height of the chassis 31 is also an element that determines the size of the gap S.

  The control device 50 is configured as shown in FIG. For example, the rectifying / smoothing unit 2 is connected to the 100 V AC power source 1, the voltage stabilizing unit 3 is connected to the rectifying / smoothing unit 2, and the dimming control unit 4 is connected to the voltage stabilizing unit 3. N LEDs 1, LED2,..., LEDn connected by a predetermined number of LED boards 20 are connected to the light control unit 4. A dimming (on / off) control signal is sent from the line 5 to the dimming control unit 4 to emit light with a desired illuminance.

  In the above, the heat generated by the control device 50 and the LEDs 1, LED 2,..., LEDn is transmitted to the thin portion 12 through the thick portion 11 of the reflector 10 and is radiated by the thin portion 12. Thus, it was found that by forming the thick portion 11 and the thin portion 12 on the reflecting plate 10, heat can be radiated more efficiently than when the reflecting plate is formed with the same thickness. This is considered to be because heat conduction from the thick portion 11 to the thin portion 12 is promoted by providing the reflector 10 with a difference in thickness. Further, by forming the thick portion 11 on the reflecting plate 10, the heat capacity can be increased and the thick portion 11 can be uniformly heated. For this reason, the LED board 20 arrange | positioned in the thick part 11 and LED21 mounted in the LED board 20 can be soaked, and the dispersion | variation in the brightness | luminance at the time of light emission of LED21 can be suppressed.

Further, the warmed air on the ceiling side of the reflecting plate 10 escapes outside through a gap S formed between the edge 19 of the long side of the reflecting plate 10 and the ceiling 60, and is cooled by this configuration. The In particular, by reducing the width S of the space formed by the reflecting plate 10 and the ceiling 60, convection is generated from the ceiling 60 side of the reflecting plate 10 toward the outside of the reflecting plate 10, and the reflecting plate 10 It is possible to easily dissipate the heat. Moreover, while making the thin part 12 of the reflecting plate 10 into a bow shape, the surface area of the reflecting plate 10 can be enlarged by forming the multiple groove | channel 14, and heat dissipation can be improved. Furthermore, since the strength of the reflecting plate 10 is increased by forming the plurality of grooves 14 along the longitudinal direction of the reflecting plate 10, that is, the longitudinal direction of the LED substrate 20, the twisting of the reflecting plate 10 during construction of the lighting fixture is increased. Etc., and the deformation of the LED substrate 20 in the longitudinal direction can be suppressed.

The perspective view which shows the whole visually observed from the lower surface direction about the lighting fixture which concerns on the Example of this invention. About the lighting fixture which concerns on the Example of this invention, the perspective view which expands and shows the principal part visually observed from the downward direction About the lighting fixture which concerns on the Example of this invention, the side view made into the partial cross section visually observed from the short side direction About the lighting fixture which concerns on the Example of this invention, the principal part side view visually observed from the long side direction The circuit block diagram of the control apparatus with which the lighting fixture which concerns on the Example of this invention is equipped.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 AC power supply 2 Rectification smoothing part 3 Voltage stabilization part 4 Dimming control part 10 Reflecting plate 11 Thick part 12 Thin part 20 Substrate 21 LED
30 Main body 50 Control device

Claims (3)

A reflector having a rectangular planar shape and comprising a long thick portion and a long thin portion connected to two long sides of the thick portion;
An LED substrate in which a plurality of LEDs are mounted side by side and disposed on the surface of the thick portion of the reflector, the longitudinal direction of which is along the longitudinal direction of the reflector;
A lighting apparatus comprising: a main body that includes a control device that is provided on a rear surface of the thick portion of the reflector and includes a lighting circuit that lights the LED. The surface or the back surface of at least the thin part of the reflecting plate is a surface that is uneven in the width direction, and a plurality of grooves formed by the unevenness has a surface formed in the longitudinal direction of the reflecting plate. The lighting fixture according to claim 1, wherein The reflecting plate is formed in such a shape that a gap is formed between the edge of the long side of the reflecting plate and the ceiling in a state where the short side of the thin portion of the reflecting plate has a bow shape and the main body is attached to the ceiling. The lighting fixture according to claim 1 or 2, wherein