JP2013222543A - Led lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lighting fixture with improved efficiency by preventing light from leaking from a gap between a reflecting plate and a substrate.SOLUTION: Since a spacer 34 is provided in a gap 25 between a substrate 22 mounting LED light sources 23 and a reflecting plate 31 arranged in an emission direction of the LED light sources 23, light emitted from the LED light sources 23 can be prevented from leaking from the gap 25 for improved efficiency.

Description

  The present invention relates to an LED lighting apparatus that irradiates light emitted from an LED forward with a reflector.

DESCRIPTION OF RELATED ART Conventionally, the LED lighting fixture which irradiates the light which LED emits ahead with a reflecting plate is known (for example, refer patent document 1).
As shown in FIG. 4, the LED lighting device 100 described in Patent Document 1 includes a substantially cylindrical device body 101 and an LED unit 102 on the front surface (lower surface). In the LED unit 102, a plurality of LEDs 104 are mounted on a substrate 103 formed in a substantially disc shape. A frame 105 is integrally provided at the front end (lower end) of the instrument main body 101 to be attached to an embedding hole provided in the ceiling.
A reflector 106 that reflects the light of the LED 104 in a predetermined direction and range is attached in front of the LED 104.

JP 2011-44393 A (FIG. 1)

However, in the LED lighting apparatus 100 as described above, the LED 104 becomes hot, so that the reflector 106 may be made of metal. In this case, since the reflecting plate 106 conducts, a gap 107 is provided between the reflecting plate 106 and the substrate 103 to achieve insulation.
For this reason, the light emitted from the LED 104 leaks from the gap 107 between the reflecting plate 106 and the substrate 103, resulting in a reduction in efficiency.

  The present invention has been made to solve the conventional problems, and provides an LED lighting apparatus capable of improving efficiency by preventing light from leaking from a gap between a reflector and a substrate. With the goal.

  The LED lighting apparatus of the present invention includes an LED light source, a substrate on which the LED light source is mounted, and a reflecting plate disposed in an emission direction of the LED light source, and is between the reflecting plate and the substrate. A spacer is provided in the gap.

  Moreover, in the LED lighting fixture of this invention, the said spacer has elasticity with respect to the said board | substrate.

  In the LED lighting apparatus of the present invention, the spacer has an insulating property and a high thermal conductivity.

  Furthermore, in the LED lighting apparatus of the present invention, the reflecting surface of the reflecting plate is a metal body.

  In the present invention, since the spacer is provided in the gap between the substrate on which the LED light source is mounted and the reflector disposed in the emission direction of the LED light source, the light emitted from the LED light source is prevented from leaking from the gap. Thus, it is possible to provide an LED lighting apparatus having an effect that the efficiency can be improved.

Sectional drawing of the LED lighting fixture of embodiment which concerns on this invention Perspective view of reflector unit divided in half (A) is sectional drawing of the reflecting plate unit which attached the board | substrate, (B) is an enlarged view of B part in (A). Cross-sectional view of a conventional LED lighting fixture

Hereinafter, the LED lighting fixture of embodiment which concerns on this invention is demonstrated using drawing.
As shown in FIG. 1, the LED lighting fixture 10 of embodiment which concerns on this invention is attached to the attachment hole (illustration omitted) provided, for example in the ceiling surface (illustration omitted), and is used for illuminating the downward direction. be able to.

The LED lighting fixture 10 has a fixture body 20. The instrument body 20 includes a cylindrical casing 21 that opens downward, and a substrate 22 is attached to the lower surface of the top plate 211 of the casing 21. An LED (LED light source) 23 is mounted on the lower surface of the substrate 22.
In addition, a large number of radiation fins 24 that release the heat generated by the LEDs 23 are provided on the upper part of the instrument body 20.

A reflector unit 30 is attached to the lower side of the instrument body 20.
As shown in FIG. 2, the reflecting plate unit 30 has a truncated conical reflecting plate 31 whose diameter is increased downward in the center. The reflection surface 311 of the reflection plate 31 is formed of a metal body.
That is, the reflective surface 311 can be formed of metal. Alternatively, the reflecting surface 311 can be formed by vapor-depositing a metal such as silver or aluminum on the surface of the reflecting plate 31 formed of resin.

A disc-shaped horizontal plate 32 extending outward in the horizontal direction is provided at the lower end of the reflecting plate 31, and a standing wall 33, which is a strength member extending upward, is provided on the entire outer periphery of the horizontal plate 32. It has been.
Therefore, the reflector unit 30 is attached to the instrument body 20 by attaching the upper end 331 of the standing wall 33 to the top plate 211 of the casing 21 of the instrument body 20 (see FIG. 1).

As shown in FIG. 3A, a gap 25 is provided between the substrate 22 and the reflection plate 31 in order to insulate the reflection plate 31 and the substrate 22.
As shown in FIG. 3B, a spacer 34 is provided over the entire periphery (see FIG. 2) at the upper end of the reflector 31 and fills the gap 25.

The spacer 34 is formed of a material having elasticity, and is inserted between the reflecting plate 31 and the substrate 22 and expands due to the elasticity to completely fill the gap 25.
The spacer 34 is formed of an insulating material, and ensures insulation between the reflector 31 and the substrate 22.

The spacer 34 is made of a material having high thermal conductivity.
For this reason, the heat | fever of the board | substrate 22 heated up by heat_generation | fever of LED23 is not only thermally radiated by the radiation fin 24 of the instrument main body 20, but is transmitted to the reflecting plate 31 via the spacer 34 (refer arrow A1 in FIG. 1).

  The heat transmitted to the reflector 31 (see arrow A2 in FIG. 1), dissipates heat in the reflector 31 (see arrow A3 in FIG. 1), or is transmitted to the horizontal plate 32 of the reflector unit 30 (in FIG. 1). (See arrow A4). The horizontal plate 32 dissipates heat (see arrow A5 in FIG. 1) or transfers heat to the standing wall 33. The heat transmitted to the standing wall 33 is transmitted to the instrument main body 20 (see arrow A6 in FIG. 1) and radiated from the radiation fins 24 and the like.

As described above, according to the LED lighting apparatus 10 of the embodiment according to the present invention described above, the spacer 34 is provided in the gap 25 between the substrate 22 on which the LED 23 is mounted and the reflection plate 31 disposed in the emission direction of the LED 23. It was.
For this reason, it can prevent that the light which LED23 emitted leaks from the clearance gap 25, and can improve efficiency.

  Further, since the spacer 34 has elasticity with respect to the substrate 22, the gap 25 between the substrate 22 and the reflection plate 31 can be completely closed.

  The spacer 34 has an insulating property and high thermal conductivity, so that the insulating property between the substrate 22 and the reflector 31 is ensured and the heat of the substrate 22 heated by the light emitted from the LED 23 is transmitted from the spacer 34. It can escape to the reflecting plate 31.

  Since the reflecting surface 311 of the reflecting plate 31 is a metal body, it is strong against heat caused by light emitted from the LED 23. Moreover, since heat dissipation is favorable, the temperature in the reflecting plate 31 can be reduced. Thereby, the lifetime of the metal body of the reflective surface 311 is extended.

  In addition, the LED lighting fixture of this invention is not limited to embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.

10 LED lighting equipment 22 Substrate 23 LED (LED light source)
25 Gap 31 Reflecting plate 311 Reflecting surface 34 Spacer

Claims (4)

An LED light source;
A substrate on which the LED light source is mounted;
A reflector disposed in the emitting direction of the LED light source,
The LED lighting fixture which provided the spacer in the clearance gap between the said reflecting plate and the said board | substrate. In the LED lighting fixture of Claim 1,
The spacer is an LED lighting device having elasticity with respect to the substrate. In the LED lighting fixture of Claim 1 or Claim 2,
The spacer is an LED lighting apparatus having an insulating property and a high thermal conductivity. In the LED lighting fixture of any one of Claim 1 thru | or 3,
The LED lighting fixture whose reflective surface of the said reflecting plate is a metal body.

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