JP5574485B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture applied to a downlight that is embedded in a ceiling surface using an LED chip as a light source.

  2. Description of the Related Art Conventionally, there is known a lighting fixture in which a lens attached to a substrate on which an LED chip is mounted via a reflector is screwed to a fixture main body having fins for heat dissipation (see, for example, Patent Document 1). .

JP 2010-49830 A (FIG. 9, paragraph 0022)

The lighting fixture described in Patent Document 1 described above can efficiently dissipate heat by the fins provided in the fixture body.
By the way, like the lighting fixture described in Patent Document 1 described above, a lens attached to a substrate on which an LED chip is mounted via a reflector is covered with a sheet metal member, and the assembly of the sheet metal member and the lens is the fixture. Lighting fixtures that are screwed to the body have been proposed.
In such a conventional lighting fixture, the assembly of the sheet metal member and the lens is screwed to the fixture main body, whereby the position of the lens with respect to the fixture main body is determined via the sheet metal member. Therefore, by requiring a sheet metal member that is a separate part for positioning, the number of parts increases and it is difficult to reduce the weight.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a lighting apparatus that can be reduced in weight by reducing the number of parts.

A lighting fixture according to the present invention has a fixture main body, a frame attached to the fixture main body, a substrate on which a plurality of LED chips are mounted, and a lens attached to the front surface of the LED chip, and is attached between the fixture main body and the frame. It includes an LED unit that is, a, a luminaire embedded in the ceiling attachment hole, the instrument body includes a bottom plate, and fins for heat dissipation provided on the upper portion of the bottom plate, provided at the center of the lower surface of the bottom plate A connection plate portion thermally connected to the substrate in the LED unit, and a pair of guides that are opposed to each other with the connection plate portion sandwiched between the connection plate portions. Projected downward and has a linear part that guides the frame and the lens when the lens is attached, and the portion sandwiched between the connecting plate part and the linear part has a U-shaped cross section below. A recess to open and The plurality of LED chips in the LED unit are mounted on the lower surface of the substrate, and a plurality of top and bottom openings corresponding to each of the plurality of LED chips are provided below the plurality of LED chips. The lens has a bottom portion that is located below the reflector plate and functions as a lens, and a side portion that protrudes upward around the bottom portion that functions as a lens. The side portion has a flat portion corresponding to the linear portion of the guide in the instrument body, and the frame is attached to the tube portion, a flange connected to the lower end portion of the tube portion, and a plurality of pieces attached to the outside of the tube portion. has a mounting spring, the, LED unit, the upper end portion of the flat portion of the side of the lens, is guided by the inner surface of the straight portion of the guide in the fixture body, if fitted in the recess of the instrument body Being position The frame is attached to the instrument body in a coaxial arrangement, and the frame is guided at the upper end of the cylinder part by the outer surface of the linear part of the guide in the instrument body, and the tip of the cylinder part is is positioned in abutment on the bottom plate, Ru attached to the instrument body in a state of arrangement of the coaxial.

  According to the lighting fixture concerning this invention, there exists an effect that a number of parts can be reduced and it can be reduced in weight.

The disassembled perspective view seen from diagonally downward of the lighting fixture of one Embodiment which concerns on this invention FIG. 1 is an external perspective view of the fixture main body to which the lens is attached in FIG. Vertical sectional view of the luminaire of FIG.

Hereinafter, a lighting apparatus according to an embodiment of the present invention will be described with reference to the drawings.
A lighting fixture 10 according to an embodiment of the present invention includes a fixture body 11, a frame 12 attached to the fixture body 11, a single substrate 15 on which a plurality of LED chips 14 are mounted, a lens 16, and a reflector 17. The present invention is applied to a downlight provided with an LED unit 13 and embedded in a mounting hole 2 provided on a ceiling surface 1 such as a concert hall.

FIG. 1 shows an exploded perspective view of a lighting fixture 10 according to an embodiment of the present invention as viewed obliquely from below.
As shown in FIG. 1, in the lighting fixture 10, the fixture body 11 is formed in a bottomed cylindrical shape using, for example, a hard resin material. The appliance main body 11 has a heat dissipation fin 18 at the top and a bottom plate 19 at the bottom, and a power supply device (not shown) is accommodated on the bottom plate 19. One of the power supply devices is connected to an external power supply, and the other is connected to a printed circuit (not shown) on the substrate 15. The instrument body 11 has a connecting plate portion 20 that is thermally connected to the substrate 15 of the LED unit 13 at the center of the bottom plate 19, and a pair of guides 21 are arranged opposite to each other on the outside of the connecting plate portion 20. Yes. The connection plate portion 20 transmits heat from the LED chip 14 transmitted to the substrate 15 to the fins 18 to dissipate heat.
The guide 21 includes a support portion 23 that can support a pair of flat surface portions 22 that are opposed to the lens 16, and a pair of rotation stop portions 24 that are formed at both ends of the support portion 23. It is formed in a substantially U shape that covers the side plate 25 and projects downward from the bottom plate 19.
The guides 21 may be two pairs or more than the pair shown.

The frame 12 is a decorative panel that is formed in a cylindrical shape using a hard resin material and has design properties. The frame 12 has a flange 27 at the lower end portion of the tubular portion 26, and a plurality of attachment springs 28 are attached to the outside of the tubular portion 26. The flange 27 positions the instrument body 11 on the ceiling surface 1 by contacting the ceiling surface 1 when the instrument body 11 is inserted into the mounting hole 2. The attachment spring 28 is elastically deformed along the appliance body 11 when the appliance body 11 is inserted into the attachment hole 2 from below, the appliance body 11 is inserted into the attachment hole 2, and the flange 27 is formed on the lower surface of the ceiling surface 1. After the contact, the instrument body 11 is held in the mounting hole 2 by being elastically restored to increase the respective outer diameters.
The lens 16 included in the LED unit 13 is molded using translucent acrylic resin or the like, and a side plate 25 is connected to a side portion of the bottom plate 29. The lens 16 has a pair of plane portions 22 at positions facing the side plate 25.

FIG. 2 shows an external perspective view of the fixture body 11 to which the lens 16 in the lighting fixture 10 is attached, as viewed obliquely from below.
As shown in FIG. 2, the lens 16 included in the LED unit 13 is connected to the central portion of the bottom plate 19 of the instrument body 11 so that the flat portion 22 of the side plate 25 is positioned on the support portion 23 of the guide 21 of the instrument body 11. The process proceeds toward the plate part 20. Thereby, the lens 16 is positioned coaxially with the instrument body 11 by the planar part 22 of the side plate 25 being fitted into the support part 23 of the guide 21 of the instrument body 11 and being supported by the support part 23. At the same time, the rotation is prevented by the rotation stop portions 24 at both ends of the support portion 23.

FIG. 3 shows a vertical sectional view of the lighting fixture 10.
As shown in FIG. 3, a mounting hole 2 having an inner diameter sufficiently larger than the bottom plate 19 having the maximum outer diameter of the instrument body 11 is formed on the ceiling surface 1.
The LED unit 13 has a plurality of LED chips 14 mounted on the lower surface of a single substrate 15, and a reflector 17 in which an upper top opening (not shown) is made to coincide with each of the LED chips 14 in front of the LED chip 14. Is attached. In the LED unit 13, the substrate 15 and the reflection plate 17 are accommodated in a space surrounded by the bottom plate 29 and the side plate 25 of the lens 16, and a lower opening (not shown) of the reflection plate 17 is provided in the bottom plate 29 of the lens 16. It corresponds to the convex part 30 having.

In the lighting fixture 10, after the lens 16 is assembled to the instrument main body 11, the frame 12 is assembled to the instrument main body 11 so that the cylindrical portion 26 is positioned outside the guide 21 of the instrument main body 11.
Here, in the lighting fixture 10, the outer diameter D1 formed by the flat portion 22 of the side plate 25 of the lens 16 is slightly smaller than the inner diameter D2 formed by the support portion 23 of the guide 21 of the fixture body 11. small. Therefore, the lens 16 is disposed at the coaxial position of the instrument body 11 by the planar portion 22 being fitted inside the support part 23 of the guide 21 of the instrument body 11.
Further, in the lighting fixture 10, the outer diameter D3 formed by the guide 21 of the fixture main body 11 is slightly smaller than the inner diameter D4 formed by the cylindrical portion 26 of the frame 12. Therefore, the frame 12 is arranged on the coaxial position of the instrument body 11 by the guide 21 of the instrument body 11 by being fitted outside the guide 21 of the instrument body 11.
That is, the luminaire 10 has an outer diameter D1 formed by the flat portion 22 of the side plate 25 of the lens 16, an inner diameter D2 formed by the support portion 23 of the guide 21 of the fixture body 11, and the fixture body 11. The size relationship between the outer diameter D3 formed by the guide 21 and the inner diameter D4 formed by the cylindrical portion 26 of the frame 12 is set to D1 <D2 <D3 <D4.
Therefore, the lighting fixture 10 can position the lens 16 and the fixture body 11 and the fixture body 11 and the frame 12 without requiring a sheet metal member which is a separate positioning component like the conventional one.

As described above, in the lighting fixture 10 according to the embodiment of the present invention described above, the outer diameter D1 formed by the flat portion 22 of the side plate 25 of the lens 16 is formed by the support portion 23 of the guide 21 of the fixture body 11. Since the inner diameter dimension D2 of the lens 16 is slightly smaller than the inner diameter dimension D2, the plane portion 22 of the lens 16 is fitted inside the support portion 23 of the guide 21 of the instrument main body 11, so that the lens 16 is positioned at the coaxial position of the instrument main body 11. Be placed.
Therefore, the lighting fixture 10 according to the embodiment of the present invention can be reduced in weight by reducing the number of parts without requiring a sheet metal member that is a separate part for positioning unlike the conventional one.

  In addition, in the lighting fixture of this invention, an LED unit, a reflecting plate, etc. are not limited to embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.

DESCRIPTION OF SYMBOLS 10 Lighting fixture 11 Appliance main body 12 Frame 13 LED unit 14 LED chip 16 Lens 21 Guide

Claims (1)

An instrument body, a frame attached to the instrument body, a substrate on which a plurality of LED chips are mounted, and a lens attached to the front surface of the LED chip, and an LED unit attached between the instrument body and the frame; the provided, a luminaire embedded in the ceiling attachment hole,
The appliance body includes a bottom plate, a heat-dissipating fin provided at an upper portion of the bottom plate, and a connection plate portion provided at a central portion of the lower surface of the bottom plate and thermally connected to the substrate in the LED unit. A pair of guides facing each other with the connection plate portion interposed therebetween, each of the guides protruding downward from the bottom plate, and mounting the lens When having a linear part that guides the frame and the lens at the time, the portion sandwiched between the connecting plate part and the linear part is a concave part that opens downward in a U-shaped cross section,
The plurality of LED chips in the LED unit are mounted on the lower surface of the substrate, and have a top opening and a lower opening below the plurality of LED chips corresponding to each of the plurality of LED chips. A plurality of reflecting plates are provided, and the lens is located below the reflecting plate and has a bottom portion that functions as a lens, and a side portion that protrudes upward around the bottom portion that functions as the lens. And the side portion has a flat portion corresponding to the linear portion of the guide in the instrument body,
The frame includes a cylinder part, a flange connected to a lower end part of the cylinder part, and a plurality of attachment springs attached to the outside of the cylinder part,
The LED unit has an upper end portion of the flat portion of the side of the lens, the instrument is guided by the inner surface of the straight portion of the guide in the body, if fitted in the concave portion of the instrument body Being positioned and attached to the instrument body in a coaxial arrangement,
The frame is positioned such that the upper end portion of the tubular portion is guided by the outer surface of the linear portion of the guide in the instrument body, and the tip of the tubular portion is abutted against the bottom plate of the instrument body. luminaires in the state of arrangement of the coaxial that is attached to the instrument body.

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