JP2011228128A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of extending an insulation distance between a mounting substrate and a frame body, without jeopardizing downsizing of the fixture.SOLUTION: Since a groove part 26 is provided to extend an insulation distance between an end face 321 of the mounting substrate 32 not covered with an insulating material and a frame body 40, insulation can be secured between the end face 321 of the mounting substrate 32 with a light source 31 mounted and the frame body 40.

Description

  The present invention relates to a lighting fixture that is embedded in a ceiling construction surface using, for example, an LED as a light source.

  2. Description of the Related Art Conventionally, a lighting fixture that uses an LED as a light source and is embedded in a ceiling surface is known (see, for example, Patent Document 1).

As illustrated in FIG. 6, the lighting fixture 100 described in Patent Literature 1 is a downlight that is installed by being inserted into a mounting hole provided in a ceiling. The lighting fixture 100 has a fixture main body 102 and a frame 106 that are substantially cylindrical and have an opening below, and accommodates a mounting substrate 107 on which a plurality of LEDs 101 are mounted as light sources. A power supply device 103 that supplies power to the LED 101 is provided on the upper part of the instrument main body 102. The power supply device 103 is provided so as to be located in the outer region of the outer periphery of the instrument body via the arm portion 104. A plurality of radiating fins 105 are provided on the upper surface of the instrument main body 102, and the arm unit 104 is coupled substantially horizontally from the radiating fins 105 so as to project the power supply device 103 to an outer region on the outer periphery of the instrument main body. .
The lighting device 100 is embedded in the ceiling surface, exposes the opening 106 of the instrument body 102 from the ceiling surface, and houses the power supply device 103 and the like on the back side of the ceiling surface.

Japanese Patent Laying-Open No. 2008-159455 (FIG. 1)

  By the way, from the viewpoint of electrical safety, lighting fixtures using LEDs are in accordance with the Japan Light Bulb Industry Association standard (7.1 Insulation Resistance in the JEL811 2005 column), where there are touchable parts that can be touched by live parts. Electrical characteristics are specified. That is, it is defined so as to ensure insulation between the mounting substrate that is the charging unit and the frame that is the accessible portion, and an insulating material 108 is provided between the mounting substrate 107 and the instrument body 102, In general, insulation between the frame 107 and the frame body 106 attached to the instrument body 102 is achieved.

  However, in such a conventional lighting fixture 100, in order to ensure a sufficient insulation distance between the mounting substrate 107 and the frame body 106, the width (thickness) of the insulating material 108 is increased to increase the insulation distance. Since this is done, there is a problem that the lighting apparatus 100 is prevented from being made compact.

  The present invention has been made to solve the conventional problems, and provides a luminaire that can extend the insulation distance between the mounting board and the frame without disturbing the compactness of the luminaire. Objective.

  The lighting fixture of the present invention has a mounting substrate on which a light source is mounted, a fixture main body that accommodates the mounting substrate, and a frame that is provided continuously in a front opening of the fixture main body, and an end face and a frame of the mounting substrate. An insulation distance portion is provided to extend the insulation distance between the two.

  Moreover, the lighting fixture of this invention is an insulation distance part which is a groove part.

  In the present invention, the insulation distance portion is provided to extend the insulation distance between the end surface of the mounting substrate that is not covered with the insulating material and the frame, so that the space between the end surface of the mounting substrate on which the light source is mounted and the frame. Therefore, it is possible to provide a lighting apparatus having an effect of ensuring the insulation.

The perspective view which shows the lighting fixture of embodiment which concerns on this invention (A) is a side view of the lighting fixture of embodiment which concerns on this invention, (B) is sectional drawing of a BB position in (A). 2A is an enlarged view of a portion III in FIG. 2B, and FIG. 2B is an enlarged view of a portion B in FIG. It is sectional drawing which shows the insulation distance between the end surface of a mounting board | substrate, and a frame, (A) is a figure when not providing an insulation distance part, (B) is a figure when providing an insulation distance part. (A) is a side view of a lighting fixture, (B) is a cross-sectional view showing an insulation distance between the end face of the mounting substrate and the fixture main body at B portion in (A). A perspective view of a conventional downlight

Hereinafter, the lighting fixture of embodiment of this invention is demonstrated using drawing.
As shown in FIGS. 1 and 2, the lighting apparatus 10 according to the embodiment of the present invention can be used as a downlight that is embedded in a mounting hole 12 provided in the ceiling surface 11 and illuminates the lower part. The lighting fixture 10 includes a fixture main body 20, an LED light emitting unit 30 that is accommodated in the fixture main body 20 and emits illumination light, a frame body 40 that is integrally attached to the lower side of the fixture main body 20, and a lighting power supply device 50.

  The instrument body 20 is formed in a cylindrical shape having a top plate 21 and a peripheral plate 22 using a hard resin material having insulation properties, and has an opening (front opening 27, FIG. 3) in the front (here, downward). (See (A)). A plurality of radiating fins 23 projecting upward and a lighting power supply device 50 that supplies power for lighting to the LED light emitting unit 30 are attached to the top surface of the top plate 21. The lighting power supply device 50 is provided so as to protrude greatly from the top plate 21 of the instrument body 20 and is electrically connected to an external commercial power source through a power supply terminal block 51 attached to the end.

  The frame 40 is formed in a cylindrical shape having the same outer diameter as the outer diameter of the instrument main body 20, and is integrally assembled with the screw 24 on the lower side of the instrument main body 20. The inner surface 41 of the frame 40 is formed in, for example, an ellipse or a parabolic curved surface, and reflects light from the LED light emitting unit 30 in a predetermined direction and range. An annular flange 43 that is exposed to the lower surface of the ceiling surface 11 in an attached state is integrally provided on the lower end surface of the frame body 40. A plurality (for example, three in this case) of attachment springs 44 are attached to the outer peripheral portion 42 of the frame body 40 at substantially equal intervals along the circumferential direction of the outer peripheral portion 42.

  Therefore, when attaching the lighting fixture 10 to the mounting hole 12 of the ceiling surface 11, the mounting spring 44 is elastically deformed upward (in the direction of arrow A in FIG. 1) of the fixture main body 20 and inserted into the mounting hole. Thereafter, the attachment spring 44 is released in the horizontal direction (in the direction of arrow B in FIG. 1), and the ceiling surface 11 is sandwiched between the lower surface of the attachment spring 44 and the upper surface of the flange portion 43, and the luminaire 10. Is fixed to the ceiling surface 11.

  As shown in FIG. 3, the LED light emitting unit 30 includes a plurality of LEDs 31 that are light sources and a mounting substrate 32 on which the LEDs 31 are mounted. The mounting substrate 32 contacts the lower surface 25 of the instrument body 20 via the insulating sheet 33. A reflective plate 34 is provided below the mounting substrate 32. The reflection plate 34 includes a disk-shaped main body 341 and a peripheral wall 343 provided vertically along the outer peripheral edge of the main body 341. The main body 341 is provided in front of the LEDs 31 and is provided with reflecting mirror portions 342 corresponding to the number of the LEDs 31, and reflects the light of the LEDs 31 downward.

Further, a translucent front panel 35 is provided below the reflecting plate 34. The lower surface of the outer peripheral edge of the front panel 35 is supported by the frame body 40 via the packing 36.
Therefore, the front panel 35, the reflecting plate 34, the mounting substrate 32, and the insulating sheet 33 are held between the instrument body 20 and the frame body 40 through the elastic force of the packing 36.

  As shown in FIG. 3B, the end surface 321 of the mounting substrate 32 is not covered with an insulator such as the insulating sheet 33 and is exposed. Therefore, the insulation distance L1 between the end surface 321 of the mounting substrate 32 that is a charging unit and the frame body 40 that is a touchable part that can be touched by a person is as shown in FIG. To the frame 40 and the vertical distance LB from the end surface 321 to the frame 40.

Here, when extending the insulation distance L1, the horizontal distance LA or the vertical distance LB may be extended. If the horizontal distance LA is extended, as described above, the lighting apparatus 10 is prevented from being made compact, so it is conceivable to extend the vertical distance LB.
Therefore, in the luminaire 10 according to the present embodiment, as shown in FIG. 4B, a recess (groove portion) 26 is provided as an insulating distance portion, and an extension portion 344 is provided above the peripheral wall 343. The upper end surface 345 of the extension portion 344 is in contact with the lower end surface 261 of the recess 26. Thereby, the distance from the end surface 321 of the mounting substrate 32 to the lower end surface 261 of the instrument main body 20 was extended.

  Therefore, the insulation distance L2 is a distance LB1 from the end surface 321 of the mounting substrate 32 to the lower surface 261 of the recess 26 of the instrument body 20, a horizontal distance LA, and a vertical distance LB2 from the lower end surface 261 of the recess 26 to the frame body 40. It will be added.

FIG. 5 shows an insulation distance between the end surface 321 of the mounting substrate 32 and the instrument main body 20. When the insulation distance L3 in the horizontal direction between the end surface 321 of the mounting substrate 32 and the instrument body 20 is compared with the insulation distance L4 in the vertical direction, the insulation distance L3 is greater than the insulation distance L4. Is done. That is, the insulation distance becomes longer by extending the insulation distance L4.
Therefore, as described above with reference to FIG. 4B, by increasing the vertical distance, the insulation distance between the end surface 321 of the mounting substrate 32 and the instrument body 20 is also increased.

  As described above, according to the lighting fixture of the embodiment according to the present invention described above, the insulating distance between the end surface 321 of the mounting substrate 32 that is not covered with the insulating material and the frame body 40 is extended by providing the recess 26. Therefore, insulation between the end surface 321 of the mounting substrate 32 on which the LED 31 is mounted and the frame body 40 can be ensured.

  Further, by providing the recess 26 in the instrument main body 20, a space insulation distance between the end surface 321 of the mounting substrate 32 and the instrument main body 20 can be secured.

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

DESCRIPTION OF SYMBOLS 10 Lighting fixture 20 Appliance body 26 Recessed part (insulation distance part, groove part)
27 Front opening 31 LED (light source)
32 Mounting board 321 End face 40 Frame L1, L2, L3, L4 Insulation distance

Claims (2)

A mounting board mounted with a light source;
An instrument body for housing the mounting substrate;
A frame body provided continuously to the front opening of the instrument body,
The lighting fixture which provided the insulation distance part which extends the insulation distance between the end surface of the said mounting board | substrate and the said frame. The lighting fixture according to claim 1,
The lighting fixture whose said insulation distance part is a groove part.

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