JP5480703B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture.

  Conventionally, a metal mounting plate, an LED unit having LEDs and disposed on the lower surface of the mounting plate, a power supply unit disposed on the upper surface of the mounting plate, and a case for storing the mounting plate are provided. An embedded lighting fixture has been provided (see, for example, Patent Document 1).

  The case is formed in a rectangular box shape with a lower surface opened from a metal material, accommodates the mounting plate with the LED unit exposed from the lower surface, and formed on the construction surface with the lower surface exposed from the construction surface. Embedded in the storage hole. Further, in the case, the mounting plate is fixed to the case in contact with the case.

  When the LED is turned on, heat generated from the LED unit and the power supply unit is radiated from the case mainly through the mounting plate.

  Here, for example, when the current supplied to the LED is increased due to, for example, increasing the brightness of the LED, the amount of heat generated in the LED unit and the power supply unit increases, and the heat dissipation performance of the case is insufficient.

  Therefore, as an example of a method for solving the above problem, there is a method of improving the heat dissipation performance of the case by forming a plurality of heat dissipation fins on the upper surface of the case.

JP 2006-172895 A

  However, the above-mentioned lighting fixture provided with heat radiation fins on the upper surface of the case has a problem that the size in the vertical direction is increased by the amount of heat radiation fins formed.

  In addition, heat generated from the LED unit and the power supply unit is transmitted through the same path (attachment plate and case) and radiated from the radiation fins. Here, when the thickness of the case is thin, the heat dissipation performance of the case is insufficient. Therefore, in the lighting device in the conventional example, it is necessary to increase the thickness of the case according to the amount of heat generated in the LED unit and the power supply unit. . Therefore, the said lighting fixture had the problem that the dimension of an up-down direction will become still larger.

  This invention is made | formed in view of the said reason, The objective is to provide the lighting fixture which can suppress the dimension of an embedding direction and can ensure heat dissipation performance.

In order to solve the above-described problems, a lighting fixture of the present invention includes a light source unit, a mounting plate that is formed in a plate shape from a metal material and on which the light source unit is disposed, and a part of the other surface of the mounting plate. A heat dissipating fin formed on the mounting plate, a metal substrate case juxtaposed with the heat dissipating fin on the other surface of the mounting plate, and a power supply circuit that is housed in the substrate case and supplies lighting power to the light source unit e Bei a power supply substrate that is, the board case, the connector connected to the power supply connector is provided for supplying power to the power supply board, and the board case and the mounting plate is provided on each engagement It is characterized in that the joint portions are attached and fixed by engaging with each other .

  In this lighting apparatus, it is preferable that the substrate case includes a mounting surface mounted on the mounting plate and a top surface facing the mounting surface, and the power supply substrate is disposed on the top surface. .

  In this lighting fixture, it is preferable that the substrate case is screwed to at least one of the mounting plate and the heat radiating fin.

  In the present invention, there is an effect that it is possible to provide a luminaire that can suppress the dimension in the embedding direction and can ensure heat dissipation performance.

The perspective view of the lighting fixture in embodiment of this invention is shown. The disassembled perspective view of the lighting fixture in the same as the above is shown.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment)
The lighting fixture of this embodiment is demonstrated using FIG. In the following description, the direction perpendicular to the up / down / left / right direction is defined as the front / rear direction, with the up / down / left / right direction in FIG.

  The lighting apparatus of the present embodiment is a so-called embedded lighting apparatus, and includes a mounting plate 1, a light source block 2, a lamp body 3, a fixing spring 4, an airtight packing 5, a heat dissipation block 6, and a power supply block. 7 and a connector block 8.

  The mounting plate 1 is formed in a substantially cylindrical plate shape from a metal material having heat dissipation, such as aluminum, and a cylindrical concave portion (not shown) is formed on the lower surface. Further, the attachment plate 1 is formed with an insertion hole 1a along the central axis. Further, the mounting plate 1 has a plurality of outer peripheral portions on the upper surface cut out along the axial direction to form a stepped portion 11, and the stepped portion 11 has an insertion hole 11 a formed along the vertical direction. Yes.

  The light source block 2 includes an LED substrate (light source unit) 21 on which LEDs are mounted, a reflecting plate 22 that houses the LED substrate 21, and a transparent plate 23 that is attached to the reflecting plate 22.

  The LED substrate 21 is formed in a disk shape in which an LED (not shown) is mounted on the lower surface and a wiring pattern is formed, and an insertion hole 21a is formed at the center thereof.

  The reflection plate 22 is formed in a cylindrical shape having an upper surface opened from a white material, and a cylindrical protrusion 221 having a screw hole 221a formed in an inner diameter portion is formed from the approximate center of the bottom surface toward the opening. . In addition, an annular rib 222 is formed from the bottom surface of the reflecting plate 22 so as to surround the periphery of the protrusion 221.

Then, with the LED mounting surface (lower surface) of the LED substrate 21 facing the bottom surface of the reflecting plate 22, the protrusion 221 of the reflecting plate 22 passes through the insertion hole 21a of the LED substrate 21, and the LED substrate 21 reflects. It is placed on the rib 222 of the plate 22. Here, on the lower surface of the reflection plate 22, an insertion hole 22 a is formed at a location facing the LED of the LED substrate 21.

  Subsequently, the reflection plate 22 on which the LED substrate 21 is placed is housed in a recess formed on the lower surface of the mounting plate 1.

  Then, the screw 78 is inserted through the insertion hole 1 a of the mounting plate 1 and fitted into the screw hole 221 a of the protrusion 221 in the reflection plate 22. Further, the reflector 75 is attached to the attachment plate 1 by inserting the screws 75 through the plurality of insertion holes 1 b formed in the vicinity of the upper surface periphery of the attachment plate 1 and fitting into the screw holes 22 c formed at the upper end of the reflection plate 22. Fixed to the screw. That is, the LED substrate 21 is accommodated between the bottom surface of the concave portion of the mounting plate 1 and the reflection plate 22 and is close to the mounting plate 1.

  The transparent plate 23 is formed in a cylindrical shape whose upper surface is opened from a translucent material, and the inner surface of the peripheral wall 23a is fitted into a step portion 22b formed on the peripheral edge of the lower surface of the reflecting plate 22. Fixed.

The lamp body 3 is formed in a substantially cylindrical shape having both ends opened by aluminum die casting and is coated with white. The lamp body 3 may be formed of a white resin. And from the approximate center of the up-and-down direction of the inner peripheral surface in the lamp main body 3, the protrusion wall 31 is formed along an inner peripheral surface, and the flange part 3b which protrudes outward is formed in the lower end of an outer peripheral surface. . Here, the lamp body 3 has an inner diameter portion that is lower than the projecting wall 31 and is expanded in diameter toward the opening.

  In addition, a plurality of pairs of protruding walls 32 that are long in the axial direction are formed on the outer peripheral surface of the lamp body 3 at substantially equal intervals in the circumferential direction (three sets in the present embodiment). From the lower end side, the extending portions 33 are formed in the directions approaching each other.

  Further, on the upper end surface of the lamp body 3, a screw hole 3 a is formed along the axial direction at a location facing the step portion 11 of the mounting plate 1. An annular packing 311 is placed on the upper surface of the protruding wall 31 of the lamp body 3, and when the upper end of the lamp body 3 comes into contact with the peripheral edge of the lower surface of the mounting plate 1, the packing 311 is transparent. It contacts the peripheral edge of the lower surface of the plate 23. Then, the lamp body 3 is screwed and fixed to the mounting plate 1 by a screw 33 that is inserted through the insertion hole 11 a of the step portion 11 of the mounting plate 1 and is fitted into the screw hole 3 a of the lamp body 3.

  The fixed spring 4 is formed in a substantially L shape by bending a substantially strip-shaped metal plate, and a base 41 inserted between the pair of projecting walls 32 of the lamp body 3 and a lower end of the base 41 are formed. It is comprised from the spring part 42 bent in the outward direction.

  The base 41 is formed with a widened portion 411 wider than the base end side (lower side) at the distal end portion, and the widened portion 411 is formed with a substantially U-shaped hole portion 41a whose lower side is the open side. In the hole 41a, a positioning piece 41b having a tip bent inward (toward the lamp body 3) is formed. The widening portion 411 is inserted between the pair of projecting walls 32, so that the fixed spring 4 is restricted from moving in the direction other than the vertical direction by the pair of projecting walls 32 and the outer peripheral surface of the lamp body 3 and the extending portion 33. Is done. Further, the tip of the positioning piece 41b abuts on the lower end of the groove 34 formed from the upper end of the outer peripheral surface of the lamp body 3 to the vicinity of the substantially vertical center, whereby the fixing spring 4 is positioned with respect to the lamp body 3. At the same time, the downward movement is restricted. When the lamp body 3 is assembled to the mounting plate 1, the upper end of the base portion 41 comes into contact with the lower surface of the mounting plate 1, and the fixed spring 4 is restricted from moving upward.

  Further, the spring part 42 has elasticity, with its base end side (base part 41 side) curved in a substantially S shape in the thickness direction to form a curved part 42a.

Airtight gasket 5 is formed into substantially annular shape and inserted through the inside diameter portion lamp Body 3, and the flange portion 3b of the lighting unit body 3 is interposed between the construction surface 9 to be described later.

  Here, when installing the lighting fixture of this embodiment in the accommodation hole formed in the construction surface which is not illustrated, first, the spring part 42 of each fixed spring 4 is bent to the lamp body 3 side. Then, the lighting fixture is inserted into the storage hole from the distal end side of the spring portion 42. Next, in the storage hole, the spring portion 42 opens and elastically contacts the inner wall of the storage hole, and the lighting fixture is fixed in the storage hole.

The heat dissipating block 6 is made of a metal material such as aluminum or copper, and is provided in a substantially half region of the top surface of the mounting plate 1 (in this embodiment, the back half of the top surface). The thermal block 6 release may be formed integrally with the mounting plate 1. The heat radiating block 6 includes a base plate 61 that is formed in a substantially rectangular plate shape and substantially bisects the upper surface of the mounting plate 1, and a plurality of heat radiating fins 62 that are formed on the rear surface of the base plate 61.

  The base plate 61 has a plurality of heat dissipating ribs 611 extending in the vertical direction on the front surface of the base plate 61. The plurality of heat dissipating ribs 611 increases the strength of the base plate 61 and increases the surface area. Has improved. In addition, screw holes 611a are respectively formed in the heat dissipating ribs 611A located at both ends in the left-right direction among the plurality of heat dissipating ribs 611 from the upper end surface downward.

  In addition, a substantially rectangular cylindrical insertion hole 63 is formed at the lower end of each end in the left-right direction of the base plate 61, with the vertical direction being the axial direction.

  The power supply block 7 includes a power supply board 71 on which a power supply circuit for supplying lighting power to the LED board 21 is mounted, a board case 72 that houses the power supply board 71, and between the power supply board 71 and the board case 72. It is comprised from the insulating sheet 73 interposed.

  The power supply board 71 has a tall component mounted on the lower surface.

  The substrate case 72 is formed in a substantially rectangular box shape from a case main body 721 on which the power supply substrate 71 is arranged and a case cover 722 fixed to the mounting plate 1.

  The case body 721 includes a rectangular top plate 721a, a side plate 721b extending downward from the front end of the top plate 721a, and a side plate 721c extending downward from both front and rear ends of the top plate 721a. The And the protrusion piece 721e is formed toward the downward direction from the rear-end part of the side plate 721c.

  The projecting piece 721e is gradually narrowed from the upper end toward the lower end, and the lower end side is formed with a constant width. Thereby, the strength of the protruding piece 721e with respect to the stress that the upper end side receives when being inserted into and removed from the insertion hole 63 is increased.

An insulating sheet 73 is provided in the case main body 721 along the inner surface of the case main body 721. A space between the upper surface of the power supply substrate 71 and the insulating sheet 73 is filled with a heat conductive resin (not shown). In other words, the upper surface of the power supply substrate 71 is in surface contact with the top plate 721a through the heat conductive resin and the insulating sheet 73 over the entire surface. Then, the screw 74 is inserted through the insertion hole 71a formed at the corner of the power supply board 71 and fitted into the screw hole 721d formed in the top plate 721a, so that the power supply board 71 is fixed to the top plate 721a by screwing. Is done.

  The case cover 722 is formed in a substantially U-shape from a substantially rectangular bottom plate 722a and side plates 722b extending upward from both left and right ends of the bottom plate 722a. The case cover 722 is disposed on the mounting plate 1 adjacent to the heat dissipation block 6.

  An insertion hole (not shown) is formed in the approximate center of the bottom plate 722a, and the screw 79 is inserted through the insertion hole and fitted into the screw hole 1c formed on the upper surface of the mounting plate 1, whereby the case cover 722 is inserted. Is fixed to the mounting plate 1.

  Then, the case body 721 and the case cover 722 are fitted together with the inner surface of the side plate 722b facing the outer surface of the side plate 721c. At that time, the side plate 721b of the case main body 721 is inserted into a substantially rectangular notch 722c formed at the front end of the bottom plate 722a.

  At that time, the projecting piece 721e formed on the case main body 721 is inserted and fitted into the inner diameter portion of the insertion hole 63 provided in the heat dissipation block 6 in a state of being in contact with the heat dissipation rib 611A and the base plate 61.

  Furthermore, the top plate 721a of the case main body 721 has insertion holes 721f formed in the vicinity of the rear corners, and screws 76 that are inserted through the insertion holes 721f and fitted into the screw holes of the heat radiation rib 611A. The case body 721 is fixed to the heat dissipation block 6 with screws.

  The connector block 8 includes a connector main body 81 disposed on the side plate 721 b of the case main body 721 and a connector cover 82 that covers the connector main body 81.

  The connector main body 81 is formed in a substantially rectangular parallelepiped shape, an input terminal portion to which a power supply connector (power supply wire) (not shown) is connected is provided on the front surface, and an output terminal portion 811 is provided on the right side surface. Further, a pair of positioning pins (not shown) are erected from the rear surface of the connector main body 81. In addition, a pair of engaging protrusions 81a are formed at the rear end portions of the left and right side surfaces of the connector main body 81 so that the front end portion is widened and protrudes toward the rear surface side (substrate case 72).

  The engagement protrusion 81a is inserted into and engaged with the engagement hole 721i formed in the side plate 721b, and the pair of positioning pins are inserted into the pair of insertion holes 721g formed in the side plate 721b. 81 is positioned on the case body 721.

  Subsequently, the screw 77 is inserted into an insertion hole 721h formed in the side plate 721b and fitted into a screw hole (not shown) formed in the rear surface of the connector main body 81, so that the connector main body 81 is screwed and fixed to the case main body 721. Is done.

  Also, one end of a lead wire (not shown) is connected to the output terminal portion 811, the lead wire passes through a substantially circular notch 721 j formed on the side edge of the side plate 721 b, and the other end of the lead wire is the power supply board 71 is connected to the input terminal.

  The connector cover 82 is formed in a substantially rectangular box shape with a rear surface opened from a resin material or the like, and is covered with the connector main body 81. Here, a pair of insertion holes 82 a are formed on the front surface of the connector cover 82 at locations facing the input terminal portion of the connector body 81. In addition, a connector insertion port 82b made of an annular wall portion surrounding the pair of insertion holes 82a protrudes from the front surface of the connector cover 82.

  Then, a power supply connector (power supply wire) is inserted into the connector insertion opening 82b and the power supply plug is connected to the input terminal portion, so that power is supplied to the input terminal portion of the power supply board 71 via the connector body 81. The power supply board 71 outputs lighting power to the LED board 21. As a result, the LED mounted on the LED substrate 21 is turned on.

At that time, heat generated by the LED substrate 21 is either heat radiating fins 62 et predominantly dissipated via the mounting plate 1. Moreover, since the power supply board 71 is in surface contact with the top plate 721a of the substrate case 72 through the insulating sheet 73 over the entire upper surface, heat generated in the power supply board 71 is mainly from the top board 721a. Heat is dissipated. That is, separate radiators (top plate 721a and radiation fins 62) are provided for the two heat sources (LED substrate 21 and power supply substrate 71). Therefore, the lighting fixture of this embodiment has improved heat dissipation performance compared to the conventional lighting fixture that radiates heat generated from two heat sources from one radiator. In addition, the said thermal radiation performance can be improved by using the silicon sheet which has insulation and high heat conductivity as the insulating sheet 73. FIG. In this embodiment, the power supply substrate 71 is in surface contact with the top plate 721a via the insulating sheet 73. Instead of the insulating sheet 73, a silicon resin having an insulating property and high thermal conductivity is used. It may be provided.

  Moreover, in the lighting fixture of this embodiment, since the heat radiating block 6 and the power supply block 7 are arranged in parallel on the upper surface of the mounting plate 1, the configuration shown in the conventional example is such that radiating fins are formed on the upper surface of the case. In comparison, the vertical dimension can be reduced. Therefore, the lighting fixture of this embodiment can suppress the dimension of an up-down direction, and can ensure heat dissipation performance.

In the lighting fixture of the present embodiment, the projecting piece 721 e of the case main body 721 is fitted into the insertion hole 63 of the heat dissipation block 6, and the case main body 721 is fixed to the heat dissipation block 6. Therefore, for example, when a power supply plug (not shown) is inserted into and removed from the connector block 8 in the front-rear direction, the case body 721 can be prevented from floating upward even if the connector block 8 receives a tensile force in the front-rear direction. . In the present embodiment, protrusion 721e is have been fitted into the insertion hole portion 63, instead of providing the protrusion 721e and the insertion hole portion 63, to each other in the case body 7 21 and the heat dissipation block 6 engages The mating engaging portions may be formed respectively.

  In the present embodiment, the connector block 8 is provided at the front end of the case main body 721, and the protruding piece 721 e is provided at the rear end of the case main body 721. That is, the protruding piece 721e is provided on the opposite side of the case main body 721 from the connector block 8. Therefore, even if the forward tensile force is applied to the connector block 8, it is possible to suppress the rear end of the case body 721 from being lifted with the protruding piece 721e as a fulcrum.

  Further, since the case main body 721 is fixed to the heat dissipation block 6 with screws 76 in addition to the protrusions 721e being fitted into the insertion holes 63, the case main body 721 can be further prevented from rising.

  In addition, when the tensile force is applied to the connector block 8, the case main body 721 generates stress at two locations of the projecting piece 721 e and the threaded portion (insertion hole 721 f). That is, the stress can be prevented from concentrating on one point (for example, the insertion hole 721f) of the case main body 721, and the case main body 721 can be prevented from being damaged or deformed.

1 Mounting plate 2 Light source block 6 Heat dissipation block 7 Power supply block 21 LED substrate (light source unit)
62 Radiation fin 71 Power supply board 72 Board case

Claims (3)

A light source unit;
A mounting plate that is formed in a plate shape from a metal material and on which the light source unit is disposed;
Radiation fins formed on a part of the other surface of the mounting plate;
A metal board case juxtaposed with the heat dissipating fins on the other surface of the mounting plate;
Wherein is housed in the board case, Bei example a power board power supply circuit is formed for supplying lighting power to the light source unit,
The board case is provided with a connector connected to a power supply connector for supplying power to the power board,
The board case and the mounting plate are mounted and fixed by engaging engagement portions provided on the board case and the mounting plate, respectively . The substrate case includes a mounting surface mounted on the mounting plate, and a top surface facing the mounting surface,
The lighting apparatus according to claim 1, wherein the power supply board is disposed on the top surface. The substrate case, illumination device according to claim 1 or 2 wherein, characterized in that it is screwed to at least one of said radiating fins and front Symbol mounting plate.

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