JP2012160265A - Lighting fixture - Google Patents

Abstract

Provided is a lighting fixture that can be miniaturized, can ensure heat dissipation, and can be easily assembled.
The light source section includes a light emitting element as a light source; a lighting device connected to the light source section for controlling lighting of the light emitting element; and the light source section is thermally coupled. And a lighting device installation wall 22 that is located laterally offset from the light source unit installation wall 21 and in which the lighting device 4 is installed. A heat dissipating member 2 integrally formed with a light source portion disposing wall 21 and a lighting device disposing wall 22; a lead wire L1 connecting the light source portion 1 and the lighting device 4; And a cutout portion 21b formed through which the lead wire L1 can pass from the outside.
[Selection] Figure 4

Description

  Embodiments described herein relate generally to a lighting fixture that uses a light emitting element such as an LED as a light source.

  Recently, along with the increase in output, efficiency, and widespread use of light emitting elements such as LEDs, lighting fixtures that can be expected to have a long life using light emitting elements as light sources have been developed.

  As the temperature of a light emitting element such as an LED increases, the light output decreases and the service life is shortened. For this reason, for lighting fixtures that use solid light emitting elements such as LEDs and EL elements as light sources, it is possible to suppress the temperature of the light emitting elements from rising in order to extend the service life or improve characteristics such as light emission efficiency. It is necessary.

  For this reason, the lighting fixture using LED as a light source provides the several heat dissipation fin which has heat conductivity in the back side of a light source part, promotes heat dissipation, and aims at suppression of the temperature rise of a light emitting element.

In addition, for example, when an LED is used as a light source of a ceiling-embedded downlight, the diameter of the recessed hole in the ceiling is often determined in advance. It is necessary to increase the height dimension of the radiating fins or increase the number of radiating fins.
On the other hand, it is desired to improve the assembling property in manufacturing this kind of lighting fixture.

JP 2001-160312 A JP 2008-159455 A JP 2008-258066 A

  However, when the height dimension of the heat radiating fins is increased, there is a problem that the installation space of the lighting fixture is insufficient, and when the number of heat radiating fins is increased, the cost increases and the interval between the heat radiating fins is increased. The problem becomes that the convection is less likely to occur due to narrowing.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a lighting apparatus that can be reduced in size, can ensure heat dissipation, and can improve assemblability.

  The lighting fixture by embodiment of this invention is equipped with the light source part which uses a light emitting element as a light source, and the lighting device which is connected to this light source part and controls lighting of the said light emitting element.

Also, a light source unit mounting wall in which the light source unit is thermally coupled and a lighting device in which the lighting device is positioned laterally offset from the light source unit mounting wall And a heat radiating member in which the light source portion disposing wall and the lighting device disposing wall are integrally formed.
Furthermore, a lead wire that connects the light source unit and the lighting device, and a notch portion that is formed on the light source unit arrangement wall and through which the lead wire can pass from the outside are provided.

  According to the embodiment of the present invention, it is possible to provide a lighting apparatus that can be miniaturized, can ensure heat dissipation, and can improve assemblability.

It is a perspective view which shows the lighting fixture (downlight) which concerns on embodiment of this invention. It is a perspective view which shows the same lighting fixture seeing from the back side. It is a side view which shows the same lighting fixture. It is a disassembled perspective view which shows the same lighting fixture. It is a top view which shows the heat radiating member in the lighting fixture. It is a side view which shows the heat radiating member in the lighting fixture. It is a side view seen from the right side in FIG. It is a top view which shows the cover member in the lighting fixture. It is a side view which shows the cover member in the same lighting fixture. FIG. 10 is a side view seen from the left side in FIG. 9. It is a perspective view which shows the assembly structure of the lighting fixture. It is a perspective view which shows the attachment structure of the cover member to the heat radiating member in the same lighting fixture. It is explanatory drawing which shows the installation state of the lighting fixture.

Hereinafter, a lighting apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 to 13. In the drawings, the same parts are denoted by the same reference numerals, and redundant description is omitted.
The luminaire according to the embodiment of the present invention is a ceiling-embedded luminaire, and is a type of downlight that is installed in an embedding hole formed in a ceiling surface.

As shown in FIGS. 1 to 4, the downlight includes a light source unit 1, a heat radiating member 2, a cover member 3, a lighting device 4, a terminal block 5, a reflecting member 6, and a light distribution member 7. I have.
As representatively shown in FIG. 4, the light source unit 1 includes a substrate 11 and a plurality of light emitting elements 12 mounted on the substrate 11 and is modularized.

  In order to improve the heat dissipation of each light emitting element 12, the substrate 11 is preferably made of a metal material having good thermal conductivity such as aluminum and excellent heat dissipation as the base plate. As such a substrate 11, a metal base substrate which is formed in a substantially rectangular flat plate shape and an insulating layer is laminated on one surface of an aluminum base plate is used. In addition, as a material of the base plate, a synthetic resin material such as a glass epoxy resin (FR-4) or a glass composite substrate (CEM-3) can be applied when an insulating material is used. A pair of mounting holes 11 a are formed on the diagonal line of the substrate 11, and a connector 11 b is provided.

  The light emitting element 12 is a bare chip of a plurality of LEDs mounted on an insulating layer of the substrate 11, and a sealing resin layer containing a phosphor is applied on the bare chip of the plurality of LEDs so as to cover the bare chip. Has been.

As the bare chips of the plurality of LEDs, for example, those emitting blue light are used in order to cause white light to be emitted from the light emitting unit. The sealing resin layer is made of a transparent synthetic resin, for example, a transparent silicone resin having a predetermined elasticity, and is a phosphor layer containing an appropriate amount of a phosphor such as YAG: Ce. The phosphor is excited by light emitted from the LED and emits light having a color different from the color of light emitted from the LED. In the present embodiment in which the LED emits blue light, a yellow phosphor that emits yellow light that is complementary to the blue light is used as the phosphor in order to be able to emit white light. Yes.
In addition, as a light emitting element as a light source, you may make it use a surface-mount type LED package, and the form is not specifically limited.

  As described with reference to FIGS. 5 to 7 and FIG. 11, the heat radiating member 2 is preferably aluminum having a thickness of 1.6 mm to 4 mm, and in this embodiment, 2 mm. It is made of a sheet metal material and is integrally formed by bending. Note that other metal materials may be used as long as bending can be performed and heat dissipation can be ensured.

  The heat dissipating member 2 has a light source portion disposition wall 21 having a substantially hexagonal shape and a flat surface, and a lighting device disposition wall 22 having a substantially rectangular shape and a flat surface, and these light source portion disposition walls. 21 and the lighting device disposition wall 22 are displaced in the lateral direction and are integrally connected by a bent portion 23. The bent portion 23 is configured to bend and extend from the light source portion arranging wall 21 in the back direction (the direction opposite to the light irradiation direction) to form a step.

  A pair of radiating fins 21 a are formed on the outer periphery of the light source unit arrangement wall 21 so as to be bent in the back direction. The height dimension at which the radiating fins 21 stand up is a low dimension of about half or less of the bent portion 23. In addition, a substantially square notch 21 b with one end on the outer peripheral side opened is formed in a portion near the bent portion 23 in the light source portion arrangement wall 21. Furthermore, a pair of screw through holes 21c and a positioning through hole 21d are formed on the flat surface of the light source section arranging wall 21 so as to face each other. The light source unit 1 is arranged on the front side of the light source unit arrangement wall 21 via a heat conductive sheet 9.

  A pair of front side walls 22a bent so as to stand in the rear direction is formed on both front sides of the lighting device mounting wall 22, and the rear sides are similarly raised in the rear direction. A pair of rear side walls 22b that are bent in the shape are formed. Further, a terminal block mounting wall 22c that is bent and extended in the lateral direction is formed from the one rear side wall 22b. Further, a U-shaped rear wall 22e is formed on the rear side of the lighting device mounting wall 22 by bending. An opening 22f that opens to the outside is formed between the front end side of the terminal block mounting wall 22c and the rear wall 22e (see mainly FIGS. 7 and 11).

  In the heat radiating member 2 formed in this way, a predetermined space S is formed on the back surface side of the light source unit arrangement wall 21 as representatively shown in FIG. The space S is formed by a step formed by the bent portion 23.

  In addition, although it is preferable to form the bending part 23, it does not necessarily need to form. Even when the bent portion 23 is not formed, the light source portion disposing wall 21 and the lighting device disposing wall 22 can be displaced in the lateral direction. For example, the heat radiating member 2 may be formed flat. Also in this case, it is possible to secure a predetermined space S on the back side of the light source section arranging wall 21.

  As will be described with reference to FIGS. 8 to 10 and FIG. 12, the cover member 3 is made of a galvanized steel plate or the like, and its cross section is bent into a substantially U-shape so that the lighting device installation wall 22 and The terminal block mounting wall 22c is covered and has a bent upper surface wall 33 and both side walls.

  Further, a front cover 31 that covers the lead wire L1 led out from the lighting device 4 is provided on the front end side so as to hang down. As shown in FIG. 10, the front cover 31 is formed in a quadrangular shape when viewed from the left side in the drawing, and has a tapered shape T whose width becomes narrower downward.

  Further, a fitting gap 35 is formed between both side walls 34 on the front side (left side in the figure) of the cover member 3 and both side ends of the front cover 31. Further, a fitting hole 36 is formed at the boundary between the rear side upper surface wall 33 and both side walls 34, that is, on the folding line. The fitting gap 35 and the fitting hole 36 are formed in dimensions that can be fitted in the thickness dimension (plate thickness) of the heat radiating member 2.

  In addition, the cover member 3 is formed with bent claw pieces 32 at appropriate positions. When the cover member 3 is combined with the heat dissipation member 2, the bent claw piece 32 has a function of being bent inward and fixing the cover member 3 to the heat dissipation member 2. In addition, in the figure, the state before bending is shown for explanation.

  As shown in FIG. 11 and FIG. 12, the lighting device 4 includes a circuit board 41 and circuit components 42 such as a control IC, a transformer, and a capacitor mounted on the circuit board 41. The circuit board 41 is formed in a substantially rectangular shape, and is attached to the lighting device installation wall 22. Specifically, a synthetic resin insulating fixture 43 standing on the lighting device installation wall 22 is spaced apart from the lighting device installation wall 22 by a predetermined distance and attached via an insulating sheet.

  Further, lead wires L 1 and L 2 connected to the connector 11 b and the terminal block 5 in the light source unit 1 are led out from the circuit board 41. Accordingly, the lighting device 4 is connected to the commercial AC power supply via the terminal block 5 by the lead wire L2, receives the AC power supply, generates a DC output, and passes through the lead wire L1 connected to the light source unit 1. A direct current output is supplied to the light emitting element 12 to control the lighting of the light emitting element 12.

  The terminal block 5 is formed in a box shape from a synthetic resin such as PBT resin, and is screwed and attached to the back side of the terminal block mounting wall 22c. The terminal block 5 is connected to a power line of a commercial AC power source.

  As shown in FIGS. 4 and 11, the reflecting member 6 is made of PBT resin or the like, has an opening 61 on the back side, has a reflecting surface 62 that expands on the front side, exhibits white, and has a short cylindrical shape. Is formed. Further, a pair of cylindrical first positioning projections 63 and a square second positioning projection 64 are formed on the back side. Further, a boss 65 having a pair of screw holes is provided.

The light distribution member 7 is formed in a conical shape extending toward the front side. The light distribution member 7 is formed of, for example, white AES resin, and the inner peripheral surface is configured as a reflection surface. In addition, the light distribution member 7 is integrally formed with an annular flange 71 extending in the outer peripheral direction as a decorative frame at a substantially circular opening end portion that widens toward the front side. Further, three attachment leaf springs 72 are mounted on the outer peripheral portion of the light distribution member 7 at equal intervals of approximately 120 degrees.
A light-transmitting cover 8 made of acrylic resin having diffusibility is arranged on the back side of the light distribution member 7, that is, on the front side of the reflection member 6.

As shown in FIG. 4, the downlight configured as described above includes the light source unit 1, the reflection member 6, the translucent cover 8, and the light distribution member 7 as the light source unit arrangement wall 21, specifically, It is attached to the front surface side of the light source section arrangement wall 21. Further, the lighting device 4 is attached to the lighting device arrangement wall 22, and the cover member 3 is attached so as to cover the lighting device 4 and the terminal block 5.
Here, the assembly configuration of the present embodiment will be described in detail with reference to FIGS. 11 and 12.

  In the present embodiment, the light source unit 1 is connected to the lighting device 4 by the lead wire L1 in advance, and the lighting device 4 and the terminal block 5 are connected in advance by the lead wire L2. Therefore, the assembly work is facilitated, and the lengths of the lead wires L1 and L2 can be shortened.

As shown in FIG. 11, the lighting device 4 and the light source unit 1 are connected by a lead wire L1 through a connector, and the terminal block 5 is connected by a lead wire L2. In this state, first, the insulative fixture 43 provided on the lighting device installation wall 22 is press-fitted into the through hole formed in the substrate 41 of the lighting device 4 so that the lighting device 4 is provided. It is attached to the wall 22.
Next, the terminal block 5 is placed on the back side of the terminal block mounting wall 22c and screwed so that the lead wire L2 on the terminal block 5 side passes through the opening 22f.
Next, the lead wire L1 on the light source unit 1 side is passed through the notch 21b from the outside, and the light source unit 1 is positioned on the front side of the light source unit installation wall 21.

  Then, the attachment structure of the light source part 1 is demonstrated. In the state where the light source unit 1 and the lighting device 4 are connected by the lead wire L1 as described above, first, the first positioning protrusion 63 of the reflecting member 6 is inserted into the pair of mounting holes 11a of the substrate 1. The substrate 1 is disposed on the reflecting member 6. Similarly, the first positioning projection 63 of the reflecting member 6 is inserted through the mounting hole 9a of the heat conductive sheet 9 so that the heat conductive sheet 9 is superimposed on the back side (back side) of the substrate 11. Deploy.

  In this state, the second positioning protrusion 64 of the reflecting member 6 is inserted into the notch portion 21b of the light source portion arranging wall 21 in the heat radiating member 2, and the reflecting member is inserted into the positioning through hole 21d of the light source portion arranging wall 21. 6 first positioning projections 63 are inserted slightly. In this way, the light source section arranging wall 21 is arranged on the heat conductive sheet 9. Therefore, the notch 21b has both a role of performing a positioning function and a role of allowing the lead wire L1 to pass therethrough.

  Next, a screw that passes through the screw through-hole 21 c of the light source section arranging wall 21 is screwed into the boss 65 of the reflecting member 6. As a result, the light source unit 1 is disposed on the light source unit disposition wall 21 of the heat dissipation member 2. In this state, the lead wire L1 connecting the lighting device 4 and the light source unit 1 corresponds to the bent part 23 and is disposed in front of the bent part 23 (see FIG. 3).

  As described above, since the light source unit 1 and the terminal block 5 can be assembled to the lighting device 4 with the lead wires L1 and L2 connected in advance, the assembling work is facilitated, and the assembling property and the productivity are improved. Can do. It is preferable that both the light source unit 1 and the terminal block 5 are assembled to the lighting device 4 with the lead wires L1 and L2 connected in advance. For example, only the light source unit 1 is connected to the lighting device 4 with the lead wire L1 in advance. You may make it assemble in the state which carried out.

  Further, since the light source unit 1 is positioned and arranged, it is easy to align, and since the light source unit 1 is attached at the same time as the reflection member 6 is attached, the assemblability can be improved. Furthermore, since the light source unit 1 is positioned and arranged, it is possible to prevent the optical axis from deviating. Furthermore, since the tightening force of the fixing means by screws or the like does not act directly on the light source unit 1, it is possible to suppress deformation and damage of the substrate 11.

  In addition, the back surface side of the substrate 11 is disposed in close contact with the light source unit disposition wall 21 via the heat conductive sheet 9 so that the light source unit 1 is thermally coupled to the light source unit disposition wall 21. become. In addition, although it is preferable to provide the heat conductive sheet 9, if the heat conduction from the board | substrate 11 to the light source part arrangement | positioning wall 21 can be ensured, it does not necessarily need to provide.

  Further, as shown in FIG. 12, the cover member 3 covers the lighting device 4 and the lead wire L1 connecting the lighting device 4 and the light source unit 1, and also covers the terminal block 5 and the lead wire L2 upward. To the heat dissipating member 2.

  Specifically, the inner surface side of both side walls 34 of the cover member 3 is guided to the outer surface side of the front side wall 22a and the rear side wall 22b, and the thickness dimension on the front end side of the front side wall 22a is fitted into the fitting gap 35. Furthermore, the thickness dimension on the upper end side of the rear side wall 22b is fitted into the fitting hole 36 and combined. In this case, since the front cover 31 of the cover member 3 is formed in the taper shape T, it can be easily inserted from above between the front side walls 22a, and the cover member 3 can be attached smoothly.

  Next, the bent claw pieces 32 formed at appropriate places are bent inward to fix and attach the cover member 3 to the heat radiating member 2. When the cover member 3 is completely attached, the lighting device 4 and the terminal block 5 are covered with the cover member 3, and the front cover 31 on the front end side of the cover member 3 is disposed corresponding to the bent portion 23. The lead wire L1 thus covered is covered (see FIG. 3).

  As described above, the cover member 3 can be attached to the heat radiating member 2 by a fitting structure without using a separate fixing means such as a screw. Therefore, there is an effect that the assembly workability can be improved.

  Next, an outline of a downlight installation method will be described with reference to FIG. First, the power line wired on the back of the ceiling surface C is pulled out from the embedded hole H formed in the ceiling surface C and connected to the terminal block 5. It is inserted into the recessed hole H from the rear side of the downlight, that is, the terminal block 5 side in the direction indicated by the arrow in the figure, and inserted into the space behind the ceiling surface C.

  At the same time, the mounting leaf spring 72 is operated with both hands so as to squeeze against the elastic force, and is inserted from the embedding hole H while supporting the light distribution member 7. As the light distribution member 7 is inserted into the embedding hole H, the hand is released and the light distribution member 7 is pushed up. As a result, the mounting leaf spring 72 returns to the outside direction and comes into contact with the back surface of the ceiling surface C, and the downlight is pulled upward by this elastic force, and the flange 71 as the decorative frame of the light distribution member 7 is embedded. The downlight is installed on the ceiling surface C by being pressed against the periphery of the hole H.

  In this case, since the space S is formed on the back surface side of the light source section arranging wall 21, the downlight is embedded with the rotation while the embedding hole H and the space behind the ceiling are limited. Interference with the edge of the hole H, that is, it can be prevented from being difficult to install due to being caught or bumped. Therefore, installation becomes easy and improvement of workability can be expected.

  Next, the operation of this embodiment will be described. When the lighting device 4 is energized, the light emitting element 12 emits light by supplying power to the substrate 11 of the light source unit 1. Most of the light emitted from each light emitting element 12 passes through the transparent cover 8 from the opening 61 of the reflecting member 6 and is irradiated forward. A part of the light is once reflected by the reflecting surface 62 of the reflecting member 6 to be controlled in light distribution, and is transmitted forward through the translucent cover 8. Then, the light irradiated forward is irradiated with the light distribution controlled as a whole by the reflection surface of the light distribution member 7.

Heat is generated while the light emitting element 12 emits light. The heat generated from the light emitting element 12 is mainly conducted from the back surface side of the substrate 11 to the light source part arranging wall 21 of the heat radiating member 2 through the heat conductive sheet 9. Further, this heat is conducted to the lighting device installation wall 22 via the bent portion 23. And heat dissipation is performed in the process of this conduction.
In addition, since a space S is formed on the back surface side of the light source section arranging wall 21, convection is effectively performed by this space S, and a heat dissipation effect is promoted.
Further, heat radiation is also promoted by a pair of heat radiation fins 21 a formed at the outer periphery of the light source section arranging wall 21.

  Thus, since the heat radiating member 2 includes the bent portion 23 that integrally connects the light source portion disposing wall 21 and the lighting device disposing wall 22 to form a step, the heat radiating area is increased. In addition, the convection path can be secured and the heat dissipation effect can be improved.

Moreover, since the terminal block 5 is arrange | positioned in the site | part away from the light source part arrangement | positioning wall 21 via the lighting device 4, it can reduce receiving a thermal influence and can suppress deterioration.
As described above, according to the present embodiment, it is possible to provide a lighting apparatus that can be miniaturized, can ensure heat dissipation, and can improve assemblability.

  In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible in the range which does not deviate from the summary of invention. For example, it is preferable to form a bent portion that forms a step by integrally connecting the light source portion arranging wall and the lighting device arranging wall, but it is not always necessary to form the bent portion. Even in the case where the bent portion is not formed, the light source portion disposing wall and the lighting device disposing wall can be displaced laterally, and in this case, a predetermined space is provided on the back side of the light source portion disposing wall. It can be secured.

DESCRIPTION OF SYMBOLS 1 ... Light source part, 2 ... Heat dissipation member, 3 ... Cover member, 4 ... Lighting apparatus,
5 ... Terminal block, 6 ... Reflective member, 7 ... Light distribution member, 11 ... Substrate,
12 ... Light-emitting element (LED), 21 ... Light source part arrangement wall, 21b ... Notch part,
22 ... wall for lighting device, 22f ... opening, 23 ... bent part,
31 ... Front cover, L1 ... Lead wire connecting the lighting device and the light source unit,
L2 ... Lead wire connecting the lighting device and terminal block, S ... Space

Claims (2)

A light source unit having a light emitting element as a light source;
A lighting device connected to the light source unit to control lighting of the light emitting element;
A light source section mounting wall in which the light source section is thermally coupled, and a lighting device mounting wall that is positioned laterally offset from the light source section mounting wall and in which the lighting device is disposed A heat dissipating member in which the light source portion disposing wall and the lighting device disposing wall are integrally formed;
A lead wire connecting the light source unit and the lighting device;
A notch portion formed on the light source portion arrangement wall and allowing the lead wire to pass from the outside;
The lighting fixture characterized by comprising. A light source unit having a light emitting element as a light source;
A lighting device connected to the light source unit to control lighting of the light emitting element;
A light source section mounting wall in which the light source section is thermally coupled, and a lighting device mounting wall that is positioned laterally offset from the light source section mounting wall and in which the lighting device is disposed A heat dissipation member integrally connected by a bent portion that extends from the light source portion mounting wall in a rearward direction to form a step difference. ;
A lead wire connecting the light source unit and the lighting device disposed so as to face the bent portion;
A cover member attached to the heat dissipation member and covering at least the lighting device and the lead wire;
The lighting fixture characterized by comprising.

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