JP2017199596A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which can easily optimize the size of a plug box.SOLUTION: A lighting device 1 includes: a lamp body 3 which is used by being mounted on a duct rail and is provided with an LED element 371 as a light source; a plug box 5 which is attached to the duct rail; a power supply circuit 7 which supplies electric power to the LED element 371; and an arm 8 which connects the light body 3 and the plug box 5. The light body 3 is provided with at least one circuit component of a plurality of circuit components constituting the power supply circuit 7 on the back side of a base part 311 in which the LED element 371 is mounted on the surface.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an illumination device attached to a duct rail on an installation surface.

In recent years, with the growing awareness of the environment, LED lighting devices that use LEDs with excellent power savings as light sources have come to be actively used, and LEDs are also used in spotlights that are attached to duct rails. Yes.
The spotlight includes a lamp having an LED as a light source, a plug box attached to a duct rail and having a power plug and a fixed plug, and an arm that connects the lamp and the plug box (for example, Patent Documents 1 and 2). . The plug box accommodates a power supply circuit that supplies power to the LED of the lamp body.

JP2013-26135A JP 2012-221771 A

When the spotlight is attached to the duct rail, the arm and the lamp body are structured to be rotatable with respect to the plug box, so that the installer often holds the plug box. At this time, if the plug box is too large or too small, it is difficult to grip the plug box.
An object of this invention is to provide the illuminating device which is easy to optimize the magnitude | size of a plug box.

  The lighting device according to the present invention is a lighting device attached to a duct rail, a lamp body including an LED element as a light source, a plug box attached to the duct rail, a power supply circuit that supplies lighting power to the LED element, An arm that connects the lamp body and the plug box, and the lamp body has a base portion on which one or more circuit components of a plurality of circuit components constituting the power supply circuit are mounted on the surface of the LED element. Be prepared on the back side.

  According to the above configuration, at least a part of the power supply circuit is accommodated on the lamp body side. For this reason, the plug box can be made small, and the size of the plug box can be easily optimized.

It is a front view of the illuminating device which concerns on embodiment. It is the perspective view which looked at the decomposition | disassembly state of the illuminating device which concerns on embodiment from the front side. It is the perspective view which looked at the decomposition | disassembly state of the illuminating device which concerns on embodiment from the back side. It is sectional drawing of the illuminating device which concerns on embodiment. It is the perspective view which looked at the state which removed the cover of the illuminating device from the front side. It is the perspective view which looked at the decomposition | disassembly state which removed the cover of the lamp body from the front side. It is the perspective view which looked at the state which removed the cover of the lamp body and cut | disconnected the fin part and the back side part of the power supply circuit unit from the back side. It is the perspective view which looked at the power supply box from the front side It is the perspective view which looked at the power supply box from the back side. It is the figure which looked at the decomposition | disassembly state of a power circuit unit from the back side. It is the figure which looked at the decomposition state of a power circuit unit from the front side. It is the perspective view which looked at the decomposition | disassembly state of a plug box from the front side. It is the perspective view which looked at the decomposition | disassembly state of a plug box from the back side. It is the perspective view which looked at the state which removed the housing | casing of the plug box from the back side.

<Overview>
An illuminating device according to an aspect of an embodiment is a lighting device attached to a duct rail, a lamp including an LED element as a light source, a plug box attached to the duct rail, and a power source that supplies lighting power to the LED element. A circuit and an arm for connecting the lamp body and the plug box, wherein the lamp body has one or more circuit parts of the plurality of circuit parts constituting the power supply circuit mounted on the surface thereof. Prepare on the back side of the base.
In the lighting device according to another aspect of the embodiment, the lamp body includes a heat sink in which a plurality of fins are provided on a back surface of the base portion, and the plurality of fins are the base when the heat sink is viewed from the back side. The one or more circuit components are accommodated in a power supply box disposed in the central portion of the base portion. Thereby, size reduction of a lamp can be achieved.
In the lighting device according to another aspect of the embodiment, the base portion has a disk shape, the power supply box has a rectangular shape when viewed from the back side, accommodates all of the plurality of circuit components, and the fins Are extended outward in the radial direction in a state of being separated from long side walls corresponding to the pair of long sides of the rectangular shape in the power supply box. Thereby, it can suppress that the heat of the heat sink at the time of lighting is transmitted to a power supply box. Here, the “disk shape” of the base portion is a concept including a perfect circle shape, an ellipse shape, a shape in which a part of a circle or an ellipse is missing, or a polygonal shape such as a hexagon when viewed from the back side. . The “rectangular shape” of the power supply box here includes a rectangular shape and a shape similar to the rectangular shape when viewed from the back side, and the rectangular shape has a linear shape in the shape similar to the rectangular shape. (In this case, it is an octagon), there is a shape in which the corner portion is an arc.
In the lighting device according to another aspect of the embodiment, the power supply box has a pair of extending plate portions extending in a plate shape toward the base portion on the bottom wall facing the back surface of the base portion, and the pair The power supply box is fixed to the base portion in a state where the extending plate portion is in contact with the base portion. Thereby, it can prevent that the bottom wall of a power supply box contacts a base part directly.
In the lighting device according to another aspect of the embodiment, the heat sink has a pair of attachment portions attached to the arm on the back side of the base portion, and the pair of attachment portions is when the base portion is viewed from the back side. The power supply box extends in a plate shape from the outer side of the portion corresponding to the pair of rectangular short sides to the back side. Thereby, size reduction of a lamp can be achieved.

<Embodiment>
1. Outline Embodiments will be described with reference to FIGS.
The illumination device 1 is a so-called spotlight that is used by being attached to a duct rail (not shown) such as a ceiling.
The lighting device 1 includes a lamp body 3 including an LED element 371 as a light source, a plug box 5 attached to a duct rail, a power supply circuit 7 (see FIG. 4) for supplying lighting power to the LED element 371, and the lamp body 3. The power supply circuit 7 is housed in the lamp body 3 as shown in FIG.
In this specification, the installation surface side such as the ceiling is the back side, and the side away from the installation surface is the front side. For example, in the lighting device, the side (floor side) on which the lamp body 3 is located with respect to the plug box 5 is the front side. Moreover, the surface located in the front side in each member is made into the surface, and the surface located in the back side is made into the back surface, respectively.

2. Each part structure (1) Lamp body It demonstrates mainly using FIGS. 4-6.
The lamp body 3 includes an LED element 371 mounted on the front surface and a heat sink 31 having a plurality of fins 313 on the back surface and a power circuit 7 accommodated in the power supply box 71 and a bottomed cylindrical cover 33 (see FIG. 2 and FIG. 2). (See FIG. 3 etc.) The lamp body 3 has a lens member 35 on the surface side of the heat sink 31. The LED element 371 is mounted on the front side of the heat sink 31 in the form of an LED module 37 mounted on the LED substrate 373. A power supply circuit unit 77 in which the power supply circuit 7 is accommodated will be described as a power supply circuit unit 77.

(1-1) Heat Sink This will be described mainly with reference to FIG.
The heat sink 31 includes a disk-shaped base portion 311, a fin portion 315 having a plurality of fins 313 extending from the back surface to the back side of the base portion 311, and an attachment portion 317 for attaching the heat sink 31 to the arm 8. The heat sink 31 is made of a metal material having good thermal conductivity, for example, aluminum. The attachment portion may be in the base portion or the fin portion.
The base part 311 has a through hole or a screw hole. A through hole 311 a provided in the central portion of the base portion 311 is for a pair of metal pins 75 extending from the power supply circuit unit 77. The metal pin 75 electrically connects the power supply circuit 7 and the LED module 37.
A through hole 311b provided in the central portion of the base portion 311 is for fixing the power circuit unit 77 to the heat sink 31, and the screw body 91 is inserted therethrough. The screw hole 311c provided in the outer part of the center part of the base part 311 is for fixing the LED module 37 to the heat sink 31, and the screw body 92 is screwed together. The screw hole 311d provided near the periphery of the base portion 311 is for fixing the lens member 35 to the heat sink 31, and the screw body 93 is screwed together.

As shown in FIG. 4 and FIG. 5 and the like, a power supply circuit unit 77 is disposed in the central portion on the back side of the base portion 311. There are a plurality of fins 313, which are erected in a plate shape on the outer portion of the central portion of the base portion 311. The standing heights of the plurality of fins 313 are substantially the same. When the heat sink 31 and the power supply circuit unit 77 are viewed from the back side, the power supply circuit 7 is accommodated in a rectangular power supply box 71 as shown in FIG. 7, and the fin 313 corresponds to the long side of the power supply box 71. It extends toward the outer peripheral edge of the base portion 311 from a portion where there is a pair of long side walls. Here, the plurality of fins 313 are spaced radially from the long side wall of the power supply box 71 and extend radially. The fins 313 are provided symmetrically with respect to an imaginary line connecting the pair of attachment portions 317. The fins 313 are provided so as to extend in the radial direction as shown in FIG. 7 when viewed from the back side. The end of the fin 313 near the periphery of the base 311 has a cylindrical shape. The diameter of this cylinder is larger than the thickness of the fin 313 excluding the cylinder part.
The attachment portion 317 has a screw hole 317a extending from two outer portions on the back surface of the base portion 311 and sandwiching the central portion of the base portion 311 to the back side and toward the other attachment portion 317. . As shown in FIGS. 2 to 4, a screw body 85 for connecting to the arm 8 is screwed into the screw hole 317 a.

(1-2) LED Module A description will be given mainly using FIG.
The LED module 37 includes a plurality of LED elements 371 and an LED substrate 373. The LED substrate 373 has a through hole. The pair of through holes 373 a in the center is for the pair of metal pins 75 extending from the power supply box 71. In FIG. 6, one through hole 373a appears, but there are actually two. A through hole 373b near the periphery is for fixing the LED module 37, and the screw body 92 is inserted therethrough.
The LED module 37 has a metal spring piece 375 in contact with the metal pin 75 on the LED substrate 373. The metal spring piece 375 is formed by bending a thin rectangular metal plate at the center in the longitudinal direction.
As shown in FIG. 4, the LED substrate 373 is fixed to the base portion 311 in a state where the back surface is in contact with the front surface of the base portion 311.

(1-3) Lens member Description will be made mainly with reference to FIGS.
The lens member 35 includes a plurality of lenses 351 arranged to face the LED elements 371, a connecting plate 353 that connects the plurality of lenses 351 on the opposite side to the LED elements 371, and an outer peripheral edge of the connecting plate 353. A cylindrical portion 355 extending in a cylindrical shape toward the base portion 311 and a fixing portion 357 for fixing the lens member 35 to the heat sink 31 are provided.
The inner diameter of the tube portion 355 is larger than the outer diameter of the LED substrate 373 as shown in FIG. The fixing portion 357 is configured by a portion recessed from the tube portion 355 in the central axis direction of the tube portion 355 (recessed into the LED substrate 373), and a groove 357a for the screw body 93 is formed in the recessed portion (see FIG. 6). ) Is provided. The recessed portion and the screw body 93 are closed by a cover body 94 as shown in FIG.
As shown in FIG. 4, the lens member 35 is fixed to the base portion 311 in a state where the back surface of the fixing portion 357 (recessed portion) is in contact with the peripheral edge portion of the surface of the LED substrate 373. The height of the cylindrical portion 355 is set so that the distance between the lens 351 and the LED element 371 becomes a predetermined value. Further, as shown in FIG. 4, an inner flange portion 333 b of a front side cover 333 to be described later is fitted into the gap between the cylindrical portion 355 of the lens member 35 and the base portion 311 of the heat sink 31.

(1-4) Power Supply Circuit Unit Description will be made mainly with reference to FIGS.
The power supply circuit unit 77 includes a circuit component (not shown) constituting the power supply circuit 7, a circuit board 73 on which the circuit component is mounted, and a power supply box 71 that houses the circuit component and the circuit board 73. Here, metal pins 75 are used for electrical connection between the power supply circuit 7 and the LED module 37.

Hereinafter, description will be made mainly with reference to FIGS.
When viewed from the back side, the power supply box 71 has a substantially rectangular shape, and as shown in FIG. 7, the long side walls corresponding to the pair of long sides are parallel to the line segment connecting the pair of attachment portions 317. It is fixed to the back surface of the heat sink 31. The power supply box 71 is made of an insulating resin material.
The power supply box 71 has a long rectangular shape on the front and back sides and lacks two corners on the front side when viewed from a direction orthogonal to the long side wall. In other words, the power supply box 71 has a hollow rectangular parallelepiped shape, and has a shape that projects from the center of the front wall (the wall facing the base portion 311) into a hollow cubic shape on the front side. That is, the power supply box 71 has a rectangular parallelepiped box portion 711 and a cubic box portion 713 as shown in FIGS. 8 and 9. The cubic box part 713 protrudes to the front side with the same thickness as the rectangular parallelepiped box part 711. Here, the thickness is a dimension in a direction orthogonal to a virtual line connecting the pair of attachment portions 317.

The width of the cubic box part 713 is smaller than the distance between the pair of attachment parts 317 as shown in FIG. In addition, the width here is a dimension in a direction connecting the pair of attachment portions 317.
The power supply box 71 has a pair of extending plate portions 715 extending in a plate shape from the surface of the rectangular parallelepiped box portion 711 and spaced from the rectangular parallelepiped box portion 711 to the front side. In a state where the power supply circuit unit 77 is attached to the heat sink 31, the pair of extending plate portions 715 are in contact with or close to the inside of the pair of attaching portions 317. Thereby, the power supply circuit unit 77 is positioned with respect to the imaginary line direction connecting the pair of attachment portions 317. The outer part of the front side end portion of the pair of extending plate portions 715 is an inclined surface. Thereby, when the power supply circuit unit 77 is attached to the heat sink 31, the pair of extending plate portions 715 are guided between the pair of attachment portions 317.

The power supply box 71 has a pair of extending plate portions 717 extending in a plate shape to the front side from a portion near the end in the width direction on the surface of the rectangular parallelepiped box portion 711. In a state where the power supply circuit unit 77 is attached to the heat sink 31, the pair of extending plate portions 717 abut on the base portion 311 of the heat sink 31. Thereby, the rectangular parallelepiped box portion 711 and the cubic box portion 713 are not directly in contact with the heat sink 31, and the power supply circuit unit 77 is attached to the heat sink 31, and the influence of heat from the heat sink 31 can be reduced. The outer surface of the power supply box 71 is not in contact with the base portion 311 or the fin 313 of the heat sink 31 and is not in contact with the back cover 331 described later. Thereby, the power supply box is efficiently cooled by the surrounding air. In addition, since a pair of extending plate portions 717 are provided at intervals in the width direction, the power supply box 71 is fixed to the heat sink 31 in a stable state.
A through hole 717 a is provided in at least one of the pair of extending plate portions 717. An electric cable (not shown) for electrically connecting the power circuit 7 (circuit board 73) and the power plug 53 passes through the through hole 717a. As shown in FIG. 8, the electric cable is introduced into the power supply box 71 from the through hole 713 a on the front wall of the cubic box part 713.
The pair of extending plate portions 715 and the pair of extending plate portions 717 are provided in a state orthogonal to the direction connecting the pair of attachment portions 317 of the heat sink 31, and the fins 313 of the heat sink 31 are arranged in the radial direction from the long side wall of the power supply box 71. Is stretched. Accordingly, air easily flows along the pair of stretched plate portions 715 and the pair of stretched plate portions 717.

As shown in FIG. 8, the front wall of the power supply box 71 is provided with a through hole 713 b through which a pair of metal pins 75 are inserted. A boss 713c is provided on the front wall of the power supply box 71, here, as shown in FIG. 8, and a screw hole 713d is provided in the boss 713c. As shown in FIG. 6, a screw body 91 is screwed into the screw hole 713d.
The power supply box 71 has a support portion that supports the circuit board 73. The support part supports from a direction orthogonal to the circuit board 41. As shown in FIGS. 10 and 11, the support portion here includes bosses 721 and 723 provided on the long side wall orthogonal to the circuit board 73. This restricts the circuit board 73 from moving in the thickness direction of the board. The power supply box 71 has an abutting portion that abuts on or close to one main surface of the circuit board 73. As shown in FIG. 10, the contact portion here is constituted by a step 725 provided in the power supply box 71.

As illustrated in FIGS. 10 and 11, the power supply box 71 is configured by a plurality of members. The power supply box 71 here is composed of two members, a box body 727 and a lid 729. The box body 727 has a shape that does not have one wall in the power supply box 71, and the lid 729 has a shape corresponding to the one wall. The one wall here is a long bottom wall.
The box body 727 and the lid 729 are provided with a coupling means for coupling the two. As the coupling means here, engagement means is used. As shown in FIGS. 10 and 11, the box body 727 has protrusions 727 a and 727 a on the short side wall and a through hole 727 b on the back wall (top wall). As shown in FIGS. 10 and 11, the lid body 729 has engagement pieces 729a and 729a that engage with the protrusions 727a and 727a, and engagement pieces 729b that engage with the through holes 727b, respectively. .

  As shown in FIGS. 10 and 11, the circuit board 73 has a shape that substantially matches the inner peripheral shape in the longitudinal section of the power supply box 71. The circuit board 73 includes a rectangular plate portion 731 and a square plate portion 733, as with the power supply box 71, when viewed from a direction orthogonal to the substrate. The circuit board 73 is provided with metal pins 75 for supplying power to the LED module 37.

(1-5) Cover This will be described mainly with reference to FIGS.
As shown in FIG. 4, the cover 33 includes a back cover 331 that mainly covers (accommodates) the heat sink 31 and a front cover 333 that covers (accommodates) the LED module 37 and the lens member 35.
The back side cover 331 has a bottomed cylindrical shape, and the opening side end portion is coupled to the front side cover 333. As shown in FIG. 3, the back-side cover 331 has a through hole 331c in the cylindrical portion 331a and the bottom portion 331b, and a through hole 331d in the cylindrical portion 331a.

The through hole 331c is for heat dissipation. As shown in FIG. 3, the through hole 331 c of the cylindrical portion 331 a has a long shape extending along the central axis of the back cover 331. In addition, the through-hole 331c of the cylinder part 331a is provided correspondingly between the fins 313 of the fin part 315, and the inflow of air from the outside of the back cover 331 to the center part of the heat sink 31 or the heat sink 31 is cooled. The flow of air that flows out from the back side cover 331 to the outside later is not hindered by the fins 313 and flows smoothly. As shown in FIG. 3, the through holes 331c in the bottom portion 331b have a long shape extending in the radial direction, and a plurality of through holes 331c are provided radially as a whole.
The through-hole 331d is for attachment to the arm 8, and a screw body 85 that is screwed into the attachment portion 317 of the heat sink 31 is inserted therethrough. Thus, the back cover 331 is attached to the arm 8 together with the heat sink 31 so that the posture can be adjusted.

As shown in FIG. 4, the front side cover 333 includes a cylindrical portion 333 a and an inner flange portion 333 b extending inward from the back side opening end of the cylindrical portion 333 a. As shown in FIG. 4, the inner flange portion 333 b fits between the cylindrical portion 355 of the lens member 35 and the base portion 311 of the heat sink 31. Thereby, the front side cover 333 is attached to the heat sink 31 side.
The front cover 333 has a stepped portion 333 c at the outer peripheral portion of the back side end of the cylindrical portion 355. The opening side end portion of the back side cover 331 is fitted to the step portion 333c. As a result, the cover 33 is fixed in a state of being positioned with respect to the heat sink 31.

(2) Plug box Description will be made mainly with reference to FIGS.
The plug box 5 includes a housing 51, a power plug 53 with an operation lever provided on the back surface of the housing 51, an arm coupling member 55 accommodated in the housing 51, and an electric power connected to the power circuit 7. An electrical connection unit 57 for connecting the cable and the power plug 53 is provided.

The casing 51 has a long rectangular parallelepiped shape along the duct rail. The housing 51 includes a housing body 511 having an opening on the back side, and a lid 513 that closes the opening of the housing body 511.
As shown in FIGS. 12 and 13, the housing body 511 has a protruding portion 511 b that protrudes to the front side from the central portion of the bottom wall 511 a located on the front side. The protruding portion 511b protrudes in a bottomed cylindrical shape (here, a bottomed cylindrical shape), and the arm coupling member 55 is accommodated therein. The housing body 511 has a lid support portion that supports the lid 513 from the front side, a unit support portion that supports the electrical connection unit 57 from the front side, and a mounting portion for mounting the lid on the inner surface. Yes.
As shown in FIG. 13, the lid support portion here includes a plurality of ribs 511 d provided on the inner surface of the peripheral wall 511 c. As shown in FIG. 13, the unit support portion here is constituted by a plurality of bosses 511e provided on the bottom wall 511a. As shown in FIG. 13, the mounting portion here is constituted by an insert screw 511f provided integrally with the bottom wall 511a. The insert screw 511f has a screw hole 511g in the central axis, and a screw body 95 inserted from the back side of the lid body 513 is screwed into the screw hole 511g.

As shown in FIGS. 12 and 13, the lid 513 has a rectangular plate shape, and is attached to the housing body 511 in a state of being fitted into the opening of the housing body 511. The lid body 513 has a pair of positioning portions 513a and 513a at both ends on the back side in the longitudinal direction. The positioning part 513a extends to the back side and fits into the groove of the duct rail.
The lid body 513 has a through hole 513b in the center. The lid body 513 includes a regulation portion that regulates the movement of the electrical connection unit 57 accommodated in the housing 51, and a mounting portion for mounting the lid body 513 to the housing body 511. As shown in FIG. 12, the restricting portion here is constituted by a rib 513 c provided on the front side surface (inner surface), and the tip of the rib 513 c abuts or approaches the fixing plate 575 of the electrical connection unit 57. As shown in FIGS. 12 and 13, the mounting portion here includes two through holes 513 d that face each other with the through hole 513 b interposed therebetween. Note that a boss 513e protruding to the front side is provided at the site of the through hole 513d, and the through hole 513d is provided in the boss 513e.

  The power plug 53 is fitted into the through-hole 513b of the lid 513 and extends from the through-hole 513b, and a pair of power-supply plugs 53 provided inside the tubular portion 531 and extending from both ends of the tubular portion 531. An electrode plate 532, 532, a lid portion 533 that is inserted through the opening on the back side of the cylindrical portion 531 and closes the opening, and a hook that is disposed on the front side of the lid body 513 and has a flange larger than the through hole 513b. It has the cylinder part 534 and the screw body 535 (refer FIG. 12) which connects the cylinder part 534 with a flange, and the cover part 533.

The cylindrical portion 531 includes a pair of engagement pieces 531a and 531a that engage with the duct rail using the groove of the duct rail, and an “L” -shaped operation lever provided at the center in the longitudinal direction of the cylindrical portion 531. 531b in the middle of the central axis direction. The base of the operation lever 531b is a circular portion 531c that is larger than the through hole 513b of the lid 513.
The electrode plate 532 is configured by bending a rectangular metal plate.
The lid portion 533 has a lid portion 533 a larger than the cylindrical portion 531 and a boss portion extending from the front side surface of the lid portion 533 a to the front side, and the boss portion is inserted into the cylindrical portion 531. A screw hole for the screw body 535 is provided in the boss portion (not shown).
As shown in FIG. 12, the flanged cylinder portion 534 has a disk shape and has a flange portion 534b having a notch 534a at two positions sandwiching the center, and a rectangular tube portion 534c extending from the front side of the flange portion 534b. have. The electrode plate 532 is disposed in a state where it passes through the notch 534a of the flanged tube portion 534 and is exposed on the outer surfaces of a pair of opposing sides of the square tube portion 534c.
The circular portion 531c of the cylindrical portion 531 larger than the through hole 513b of the lid 513 is on the back side of the lid 513, and the flange portion 534b of the flanged cylindrical portion 534 larger than the through hole 513b of the lid 513 is the lid 513. Since the power plug 53 is located on the front side, the power plug 53 can rotate around the central axis of the cylindrical portion 531.
The arm coupling member 55 includes a nut body 55a and a locking nut body 55b. The nut body 55 a is screwed with a screw body 97 extending from the arm 8. The washer 55c is arranged outside the housing 51 as shown in FIG. 3, but in FIGS. 12 and 13, it is shown together with the nut body 55a and the locking nut body 55b.

The electrical connection unit 57 includes a pair of connection terminal pieces 571 and 571 to which an electrical cable connected to the power supply circuit unit 77 is connected, and a fixing plate 575 for fixing the connection terminal pieces 571 and 571. Each connection terminal piece 571 includes a metal plate 577 having an “L” shape, and a connection pin 579 provided on a short side portion constituting “L” and connected to an electric cable.
The fixing plate 575 has an “H” shape and has a through hole. The rectangular tube portion 534c of the power plug 53 is fitted into the central through hole 575a. Two through holes 575b sandwiching the through hole 575a are for power cables. Two through holes 575c sandwiching the through hole 575a are for fitting the boss 511e of the housing body 511.
Chips 575d on both sides in the longitudinal direction constituting the “H” shape are for insert screws 511f present on the bottom wall 511a of the housing body 511. In the fixing plate 575, one extending piece 575e constituting the “H” shape is shorter than the other extending piece 575f. Thus, even when the rib 513c provided on the lid 513 is in strong contact with the tip of the extension piece 575e in a state where the lid 513 is attached to the housing body 511, it is difficult to deform.
A plurality of pairs of sandwiching ribs 575g are provided on the back surface of the fixed plate 575 so as to extend to the back side so as to sandwich the metal plate 577. A fixing rib 575 h extending in an “L” shape is provided on the back surface of the fixing plate 575. The fixing rib 575h fixes the electric cable.

(3) Arm A description will be given mainly with reference to FIGS.
The arm 8 is attached to the center of the front surface (wall) of the rectangular parallelepiped plug box 5. As shown in FIGS. 1 and 4, the arm 8 has a hollow “U” shape and is attached so that the opening side of the “U” shape is located on the front side. The pair of end portions 81 and 81 on the opening side sandwich the outer surface of the lamp body 3 including the back side cover 331 and the heat sink 31 in a freely rotatable manner. The rotation axis here is an imaginary line connecting the pair of end portions 81, 81. The arm 8 has a through-hole 83 on the opposite side (back side) of the pair of end portions 81, 81 on the opening side, and a screw body 97 disposed inside extends from the through-hole 83 and extends into the plug box 5. It enters from the through hole 511h of the protrusion 511b and is screwed into the nut body 55a.

  Although the embodiment has been described above, the present invention is not limited to this embodiment, and for example, the following modification may be used. Further, the embodiment may be a combination of the modified example and the modified examples. In addition, examples that are not described in the embodiments and modifications, and design changes that do not depart from the gist are also included in the present invention.

<Modification>
1. Lamp Body The lamp body 3 in the embodiment includes a plurality of LED elements 371, but may include a single LED element. In the lamp 3, the lens member 35 is attached to the heat sink 31. However, for example, the lens member may be attached to the cover.
The lamp body 3 in the embodiment has the fin portion 315 on the back side of the base portion 311, but the fin (fin portion) may not be provided when the amount of heat generated from the LED element is small. The fins of the heat sink may also exist in a region facing the short side (short side wall) of the rectangular power supply box when the heat sink is viewed from the back side. The fin shape may be a plate shape or a cylindrical shape, and the shape, number, size, and the like can be appropriately determined according to the amount of heat generated by the LED element.
The cover 33 in the embodiment is configured by two members, the back side cover 331 and the front side cover 333. However, for example, the cover 33 may be configured by one cover or may be configured by three or more members.

2. Plug box The plug box 5 in the embodiment does not contain circuit components constituting the power supply circuit therein, but may contain part of the circuit components constituting the power supply circuit. For example, a circuit component that constitutes an AD conversion circuit that converts commercial power into DC power is housed in a housing, and a circuit component that constitutes a DD conversion circuit that converts DC power from a DC power source to a DC power source is supplied to the lamp body. It may be accommodated.
The plug box 5 in the embodiment includes the power plug 53 as a duct rail mounting plug. For example, in addition to the power plug 53, the plug box 5 may include one or more fixed plugs that do not have an electrical connection function.
The plug box 5 uses the electrical connection unit 57 to connect the power plug 53 and the electrical cable. For example, the electrode plate 532 of the power plug 53 and the electrical cable are directly connected without using the electrical connection unit. You may do it.
In the embodiment, the plug box has a rectangular parallelepiped shape so that the mounting direction to the duct rail is clear. However, the plug box may have a cubic shape or a vertical cylindrical shape as long as the rear side surface is large enough to arrange the power plug.

3. Power supply circuit In the power supply circuit in the embodiment, as described above, all the circuit components constituting the circuit are accommodated on the lamp body 3 side, but one or more circuits among the plurality of circuit components constituting the circuit are included. It is only necessary that the parts are accommodated on the lamp body side. By accommodating one or more circuit components on the lamp body side, the number of circuit components accommodated in the plug box is reduced, and the degree of freedom in determining the size of the plug box is increased.
The power supply circuit unit 77 in the embodiment accommodates the power supply circuit 7 in the power supply box 71. For example, when the heat sink is made of a resin material, the temperature of the heat sink when the LED element emits light (during lighting) is low. The power supply circuit may be arranged on the back side of the base portion without using the power supply box. Moreover, you may make it cover with an insulating cylinder and a film body instead of a power supply box. Although the metal pin 75 is used for the connection between the power supply circuit 7 and the LED module 37 in the embodiment, an electric cable may be used.

The shape and size of the power supply box are not particularly limited. The material is not limited to resin and may be metal. Further, the method for supporting the power supply box is not particularly limited. However, when the amount of heat generated by the LED element is large, it is preferable that the portion for housing the circuit board is separated from the heat sink (not thermally conducted). Moreover, when the emitted-heat amount of an LED element is large, the one where the area which contacts a heat sink is small is preferable. In the embodiment, the pair of extending plate portions 717 are in contact with the base portion 311. However, for example, three or more extending rods may be in contact with the base portion. Note that it is preferable to fix the power supply box to the base portion in a stable state.
Although the power supply box 71 of the embodiment is fixed to the base portion 311, the power supply box may be fixed to the back side of the base portion, for example, may be fixed to a fin.

DESCRIPTION OF SYMBOLS 1 Illuminating device 3 Lamp body 5 Plug box 7 Power supply circuit unit 8 Arm 31 Heat sink 51 Case 53 Power plug 71 Power supply box 73 Circuit board 77 Power supply circuit unit 311 Base part 313 Fin

Claims (5)

In the lighting device attached to the duct rail,
A lamp comprising an LED element as a light source;
A plug box attached to the duct rail;
A power supply circuit for supplying lighting power to the LED element;
An arm for connecting the lamp body and the plug box,
The lamp body includes at least one circuit component among a plurality of circuit components constituting the power supply circuit on a back side of a base portion on which the LED element is mounted on the surface. The lamp body includes a heat sink in which a plurality of fins are provided on the back surface of the base portion,
When the heat sink is viewed from the back side, the plurality of fins are provided in an outer portion of the central portion of the base portion, and the one or more circuit components are accommodated in a power supply box disposed in the central portion of the base portion. The lighting device according to claim 1. The base portion has a disk shape,
The power box has a rectangular shape when viewed from the back side, and accommodates all of the plurality of circuit components,
The lighting device according to claim 2, wherein the fin extends radially outward in a state of being separated from long side walls corresponding to the pair of long sides of the rectangular shape in the power supply box. The power supply box has a pair of extending plate portions extending in a plate shape toward the base portion on the bottom wall facing the back surface of the base portion,
The lighting device according to claim 3, wherein the power supply box is fixed to the base portion in a state where the pair of extending plate portions are in contact with the base portion. The heat sink has a pair of attachment portions attached to the arm on the back side of the base portion,
The pair of attachment portions extend in a plate shape from the outer portion of the portion corresponding to the pair of rectangular short sides of the power supply box to the back side when the base portion is viewed from the back side. Or the illuminating device of 4.

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