JP6883883B2 - Lighting device - Google Patents

Description

The present invention relates to a lighting device installed by utilizing an opening on an installation surface.

An LED is applied as a light source of a lighting device such as a so-called downlight, which is installed by utilizing an opening of an installation surface such as a ceiling (for example, Patent Document 1).
The lighting device described in Patent Document 1 includes a lamp body having a light source, a frame body attached to an installation portion and supporting the lamp body, and the lamp body includes a substantially columnar heat sink to be inserted into the frame body. It has an arm part that supports the lamp body to the frame body, and the frame body has a cylindrical guide part into which a heat source is inserted and a disk-shaped pedestal having an opening in the center part on which the arm part is placed. Has a part.

Japanese Unexamined Patent Publication No. 2014-216161 Japanese Unexamined Patent Publication No. 2014-107106

However, in the lighting device of Patent Document 1, the entire load of the lamp body acts on the arm portion, the arm portion needs to be designed firmly, and the weight becomes heavy as a whole.
An object of the present invention is to provide a lighting device capable of reducing weight in view of the above problems.

The lighting device according to the present invention includes a light source unit that irradiates light on the front side using an LED as a light source and a support unit that supports the light source unit, and the light source unit and the support unit are provided on an installation surface provided with an opening for embedding. In a lighting device in which a back side portion of the portion is embedded and mounted, the light source portion includes an LED unit, a heat sink, and a reflector, and the support portion includes a back side ring located on the back side of the installation surface and a back side ring of the installation surface. A front ring located on the front side and a connecting tool for connecting the back ring and the front ring are provided, the LED unit is attached to the front side of the heat source, the heat source is attached to the back ring, and the reflector is attached. Are attached to the back ring at intervals in the circumferential direction with respect to the back ring.

Since the heat sink is directly attached to the back ring of the apparatus main body according to the present invention, other members (arm portion in Patent Document 1) for fixing the heat sink to the back ring are not required, and the weight can be reduced. it can.

(A) is a perspective view of the lighting device according to the first embodiment seen from the back side, and (b) is a perspective view of the lighting device according to the first embodiment seen from the front side. It is an exploded perspective view of the lighting apparatus which concerns on 1st Embodiment. It is an exploded perspective view of the light source part which concerns on 1st Embodiment. (A) is a perspective view of the LED unit according to the first embodiment as viewed from the front side, and (b) is a perspective view of the LED unit according to the first embodiment as viewed from the back side. (A) is a perspective view of the heat sink according to the first embodiment as viewed from the back side, and (b) is a perspective view of the heat sink according to the first embodiment as viewed from the front side. (A) is a perspective view of the cover according to the first embodiment as viewed from the front side, and (b) is a perspective view of the cover according to the first embodiment as viewed from the back side. (A) is a perspective view of the reflector according to the first embodiment as viewed from the front side, and (b) is a perspective view of the reflector according to the first embodiment as viewed from the back side. It is a vertical sectional view of the cover which concerns on 1st Embodiment. It is an exploded perspective view of the support part which concerns on 1st Embodiment. (A) is a perspective view of the back side ring according to the first embodiment as viewed from the back side, and (b) is a perspective view of the back side ring according to the first embodiment as viewed from the front side. (A) is a perspective view of the arm according to the first embodiment seen from the outside, and (b) is a perspective view of the arm according to the first embodiment seen from the inside. (A) is a perspective view of the front side ring according to the first embodiment as viewed from the back side, and (b) is a vertical sectional view of the front side ring according to the first embodiment. It is a perspective view which looked at the elastic fixture which concerns on 1st Embodiment from the back side. It is an enlarged view of the connection part of the arm and the front side ring which concerns on 1st Embodiment, (a) is the view which was seen from the outside with the back side, and (b) is the view which was seen from the inside by the back side. is there. (A) is a perspective view of the lighting device according to the second embodiment as viewed from the back side, and (b) is a perspective view of the reflector according to the second embodiment as viewed from the back side. It is a figure which shows the modification of the elastic fixture.

The lighting device according to one aspect of the present invention includes a light source unit that irradiates light on the front side using an LED as a light source and a support unit that supports the light source unit, and the light source unit is provided on an installation surface provided with an opening for embedding. In the lighting device in which the back side portion of the support portion is embedded and attached, the light source portion includes an LED unit, a heat sink, and a reflector, and the support portion includes a back side ring located on the back side of the installation surface and the back side ring. A front ring located on the front side of the installation surface and a connecting tool for connecting the back ring and the front ring are provided, the LED unit is attached to the front side of the heat source, and the heat source is attached to the back ring. The outer diameter of the front ring is larger than the outer diameter of the back ring, and the connector has a bent portion between a fixed position with the front ring and a fixed position with the back ring .
In the lighting device according to one aspect, the inner peripheral diameter of the back ring is smaller than the outer diameter of the reflector . In the lighting device according to one aspect, the back side ring is attached via a stretch piece extending from a portion of the back side ring spaced in the circumferential direction to the front side .
In the lighting device according to one aspect, the reflector has a tubular reflecting portion and a stretched portion extending from the reflecting portion to the back side, and fixes the stretched portion and the stretched piece . In the lighting device according to one aspect, the stretched piece is located on the outer peripheral side of the stretched portion of the reflector . In the lighting device according to one aspect, the front ring has a first step portion at an inner peripheral edge portion, and the reflector has an outer collar portion formed at the front end of the reflecting portion. It is attached to the back ring in a state where the collar portion does not come into contact with the first step portion .
The lighting device according to one aspect of the specification includes a light source unit that irradiates light on the front side using an LED as a light source and a support unit that supports the light source unit, and the light source unit is provided on an installation surface provided with an opening for embedding. In a lighting device in which the back side portion of the support portion is embedded and mounted, the light source portion includes at least an LED unit and a heat sink, and the support portion includes a back side ring located on the back side of the installation surface and the installation surface. The LED unit is attached to the front side of the heat source, and the heat source is attached to the back ring.
In the lighting device according to another aspect of the specification, the light source unit has a tubular reflector that reflects light emitted from the LED, and the reflector is attached to the back ring. As a result, the reflector and the LED unit are attached to the back ring, and the positioning of both can be easily performed.

In a lighting device according to another aspect of the specification, the LED unit is mounted on the front side of the heat sink, and between the LED unit mounting portion of the heat sink and the back end portion of the reflector, the inside and outside of the reflector. There is an air flow path that communicates with. As a result, the temperature rise of the LED unit can be suppressed.
In the lighting device according to another aspect of the specification, the support portion includes an elastic fixture fixed to the opening, and the elastic fixture and the front ring are fixed to the connector by one fixture. .. As a result, the number of parts and the number of machining points can be reduced, and the implementation can be carried out at low cost.
In the lighting device according to another aspect of the specification, the front side ring has a plurality of stretched pieces extending in a plate shape on the back side at intervals in the circumferential direction, and the connecting tool is provided with the extending direction of the stretched pieces and It has an end facing surface that is in contact with or close to an end surface in a direction orthogonal to the thickness direction, and a surface facing surface that is in contact with or is close to both main surfaces in the thickness direction of the stretched piece. Thereby, the positional deviation in both directions of the direction orthogonal to the stretching direction and the thickness direction of the stretched piece and the thickness direction of the stretched piece can be regulated.
In the lighting device according to another aspect of the specification, the back side ring has a plurality of sets of two through holes at intervals in the circumferential direction, and the connecting tool has a facing plate portion facing the back side ring and the facing plate portion facing the back side ring. The first through hole which is a plate portion and is provided corresponding to one through hole of the two through holes, and the back side of the facing plate portion which corresponds to the other through hole of the two through holes. The back ring and the connecting tool are provided by a connecting body that is provided with a convex portion extending to the other and the convex portion is inserted into the other through hole, and the one through hole and the first through hole are inserted through the connecting body. And are connected. As a result, the back ring and the connector can be connected while restricting the rotation around the central axis of one of the through holes.

<Embodiment>
Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. It should be noted that this embodiment is an example, and the present embodiment is not limited to this.
The side where light is emitted from the lighting device is the irradiation side or the front side, and the side opposite to the side where the light is emitted is the anti-irradiation side or the back side.

<First Embodiment>
1. 1. Lighting device A description will be given mainly with reference to FIGS. 1 to 3.
The lighting device 1 includes a light source unit 3 having an LED as a light source, and a support unit 5 for supporting the light source unit 3. The light source unit 3 includes at least an LED unit 31 and a heat sink 33. In addition to the LED unit 31 and the heat sink 33, the light source unit 3 may include, for example, at least one of a cover 35 and a reflector 37. The support portion 5 includes a back side ring 51, a plurality of (here, three) connecting tools (hereinafter, referred to as “arms”) 53, and a front side ring 55. The support portion 5 is provided with an elastic fixture 57 that is fixed to the installation surface by using the opening of the installation surface. The lighting device 1 is detachably (removably attached and detached) attached to the installation surface via the elastic fixture 57.
The LED unit 31 of the light source unit 3 is attached to the heat sink 33, and the heat sink 33 is attached to the back ring 51. The cover 35 of the light source unit 3 is attached to the heat sink 33. The reflector 37 is attached to the back ring 51. That is, the lighting device 1 has a structure in which most of the members constituting the light source unit 3 are attached to the back ring 51 of the support unit 5.
The lighting device 1 receives power from a power supply device (not shown) arranged on the back side of the installation surface. The power supply generates electric power for lighting the LED from a commercial power source. In some cases, the lighting device may include the lighting device 1 and the power supply device described below.

2. Light source unit (1) LED unit This will be described mainly with reference to FIG.
The LED unit 31 includes a plurality of LEDs 311 and a mounting board 313. The plurality of LEDs 311 are arranged on the surface of the mounting substrate 313, for example, in a regular matrix. The mounting board 313 has, for example, a disk shape. A connector 315 that electrically connects to the wiring pattern for the LED 311 is provided on the surface of the mounting board 313. The mounting board 313 has a plurality of types of chipped portions 313a, 313b, 313c, and 313d on the peripheral edge portion. The chipped portion 313a is for a fixture for fixing the mounting board 313 to the heat sink 33. The fixture here is a screw body 70. The chipped portion 313b is for positioning the cover 35 and the LED unit 31 (mounting board 313), and the protrusion 351c (see FIG. 6) of the cover 35 fits into the chipped portion 313b. A power supply cable for supplying power to the LED 311 is arranged in the chipped portion 313c, and a cable fixture 38 (see FIG. 3) for fixing the power supply cable is fitted.

(2) Heat sink This will be described mainly with reference to FIG.
The heat sink 33 has a base portion 331 and a heat radiating portion 333.

(2-1) Base portion The base portion 331 has a plate shape. The base portion 331 here has a disk shape. A heat radiating portion 333 exists on the back side of the base portion 331. The region excluding the peripheral edge of the surface of the base portion 331 is the arrangement region 331a of the LED unit 31. One or a plurality of screw holes 331b, screw holes 331c, and chipped portions 331d are provided on the peripheral edge of the surface of the base portion 331.
The screw hole 331b is for a screw body 70 (see FIG. 3) for fixing the LED unit 31 and the cover 35. The screw hole 331c is for a connecting tool for connecting the back ring 51 and the heat sink 33. The connector here is a screw body 71 (see FIG. 3). The screw hole 331b may be a through hole. The screw hole 331c may be a screw hole (not penetrating) provided from the back surface. The chipped portion 331d is formed so as to be recessed from the outer peripheral surface toward the center side, and a power feeding cable and a cable fixture 38 are arranged.

A step 331e that enters the center side of the base portion 331 is provided on the peripheral edge portion of the back surface. The portion where the screw hole 331c exists and the peripheral portion thereof are recessed regions 331f and 331g which are recessed toward the surface side. The recessed regions 331f and 331g here are at the same level as the front surface and the front and back directions of the step 331e (they are flush with each other when viewed from the side).
The recessed regions 331f and 331g have different shapes when viewed from the back side. When the base portion 331 is viewed from the back side, the recessed region 331f has a shape that enters a rectangular shape from the outer peripheral edge toward the center, and the recessed region 331 g has a shape that enters a semi-elliptical shape from the outer peripheral edge toward the center. doing. The shapes of the recessed regions 331f and 331g are not limited to this.

(2-2) Heat-dissipating unit The heat-dissipating unit 333 has a plurality of fins 333a, 333b, and 333c, and has a columnar shape as a whole. The fins 333a, 333b, and 333c here are provided so as to stand upright from the surface of the base portion 331 located on the innermost side. The fins 333a, 333b, and 333c are elongated in the radial direction from the central axis when viewed from the back side, and the extending tip thereof has a circular shape. A columnar portion 333d exists in the center of the heat radiating portion 333, and a screw hole 333e for attaching the fixing tool 36 for grounding is provided in the columnar portion 333d. The fins 333a, 333b, and 333c are arranged concentrically in this order so that the fins 333a are on the center side.
The heat radiating portion 333 does not have fins in the region of the base portion 331 where the recessed regions 331f and 331g exist. A power supply cable is arranged in a portion of the heat radiating portion 333 where the fins are not provided. A cable accommodating body 39 accommodating the power feeding cable is attached to the heat sink 33. For mounting, a screw body 71 that connects the heat sink 33 and the back ring 51 is used (see FIG. 3).

(3) Cover This will be described mainly with reference to FIG.
The cover 35 has an annular portion 351 located in the outer peripheral region and a bulging portion 353 that bulges from the inner peripheral edge of the annular portion 351 to the front side. Although the annular portion 351 has an annular shape here, it is not exactly continuous in the circumferential direction, and a part (a portion where the cable accommodating portion 355 described later is present) is missing.

The back surface of the annular portion 351 abuts on the peripheral edge of the front surface of the mounting substrate 313 of the LED unit 31. The annular portion 351 is provided with a plurality of types of chipped portions 351a and 351b.
A plurality of chipped portions 351a and 351b extend from the peripheral edge toward the center and are provided at a plurality (here, three) at intervals in the circumferential direction. The chipped portion 351a is provided corresponding to the chipped portion 313a of the mounting board 313 of the LED unit 31, and is for a screw body 70 that fixes the cover 35 and the LED unit 31 to the heat sink 33. The chipped portion 351b is provided corresponding to the chipped portion 313d of the mounting board 313 of the LED unit 31. The reinforcing portion 375 of the reflector 37 enters the chipped portion 351b (see (b) and FIG. 8 of FIG. 7). The reflector 37 is positioned with respect to the LED unit 31 by this entry.
The back surface of the annular portion 351 has a protrusion 351c projecting to the back side. There are a plurality of protrusions 351c (three in this case), and the protrusions 351c are provided at intervals in the circumferential direction. The protrusion 351c fits into the chipped portion 313b of the mounting board 313 of the LED unit 31. The cover 35 is positioned with respect to the LED unit 31 by fitting the protrusion 351c into the chipped portion 313b.

The cover 35 has a cable accommodating portion 355 to which a power supply cable connected to the LED unit 31 is arranged. The cable accommodating portion 355 is provided at a portion where a part of the annular portion 351 is missing. The cable accommodating portion 355 extends from the outer peripheral edge of the overhanging portion 355a and the overhanging portion 355a extending to the front side along the circumference of the chipped portion of the annular portion 351. It has a fitting portion 355b that fits into the chipped portion 313c of the heat sink 33 and the chipped portion 331d of the heat sink 33.
The bulging portion 353 bulges in a coronal plane (the cross section has an arc shape). Here, as shown in FIG. 6A, the bulging curvature differs between the central portion 353a and the peripheral portion 353b.

(4) Reflector This will be described mainly with reference to FIGS. 7 and 8.
The reflector 37 has a reflector 371 that reflects the light emitted from the LED unit 31 in a desired direction, and an attachment portion 373 for attaching the reflector 37 to the support portion 5.
The reflective portion 371 has a shape similar to a hollow spherical band or a cylinder. The inner peripheral surface 371a of the reflecting portion 371 is a reflecting surface. The reflecting portion 371 has an outer collar 371b protruding outward at the front end. The outer collar 371b can improve the design of the front end of the reflective portion 371. The outer peripheral edge of the outer collar 371b reaches the step 551a of the front ring 55. As a result, the gap between the reflective portion 371 and the front ring 55 becomes difficult to see, and the design can be improved.

The mounting portion 373 has a stretched portion 373a extending from the intermediate portion in the front-back direction of the reflecting portion 371 to the back side, and a through hole 373b provided in the stretched portion 373a. The stretched portion 373a here extends in a cylindrical shape. The through hole 373b is for a fixture fixed to the reflector support portion 517 of the support portion 5. Specifically, the fixture is a screw body 75 (see FIG. 1), and the screw body 75 is fixed by being screwed into the screw hole 517b of the reflector support portion 517 of the support portion 5, and the through hole 373b is inserted. (The screw body 75 is not screwed into the through hole 373b). The through hole 373b is larger than the threaded portion of the screw body 75 and has an elongated hole shape that is long in the circumferential direction of the reflector 37.
The mounting portion 373 has one convex portion 373c on the back side end surface. The convex portion 373c fits into the chipped portion 331d of the base portion 331 of the heat sink 33. As a result, the reflector 37 is positioned with respect to the heat sink 33.

The diameter of the inner peripheral surface of the stretched portion 373a of the mounting portion 373 is larger than the diameter of the outer peripheral surface of the base portion 331 of the heat sink 33. As a result, the contact area between the reflector 37 and the heat sink 33 can be reduced. Further, there is a gap between the inner peripheral surface of the extended portion 373a of the mounting portion 373 and the base portion 331 of the heat sink 33. This gap communicates with the inside and the outside of the reflector 37 (mounting part 373), and further communicates with the outside of the support part 5, and the air from the outside air-cools the base part 331 of the heat sink 33. It is a route. The gap is preferably 0.5 [mm] or more in consideration of the flow of air. On the contrary, considering the increase in size of the apparatus, 5.0 [mm] or less is preferable. Here, there is a gap of 1.0 [mm] in the radial direction between the outer peripheral edge of the base portion 331 and the inner peripheral edge of the mounting portion 373.
The reflector 37 has a reinforcing portion 375 that connects the reflecting portion 371 and the mounting portion 373 to reinforce the mounting portion. Specifically, the reinforcing portion 375 connects the outer surface of the portion of the reflecting portion 371 facing the mounting portion 373 and the inner surface of the extended portion 373a of the mounting portion 373. The back end of the stretched portion 373a is located behind the back end of the reflective portion 371. For this reason, the end surface on the back side of the reinforcing portion 375 has a stepped shape that rises outward. In other words, the reinforcing portion 375 has a stepped portion 375a having a chipped inside. The reinforcing portions 375 have a plate shape, and a plurality of reinforcing portions 375 (here, three) are provided at intervals in the circumferential direction. The stepped portion 375a in the reinforcing portion 375 fits into the chipped portion 313d of the mounting board 313 of the LED unit 31 and the chipped portion 351b of the cover 35. As a result, the reflector 37 is positioned with respect to the LED unit 31 and the cover 35.

3. 3. Support portion As shown in FIGS. 3 and 9, the support portion 5 has the above-mentioned 1. As described in the lighting device, it has a back side ring 51, a plurality of connecting tools (hereinafter, referred to as “arms”) 53, a front side ring 55, and an elastic fixing tool 57.

(1) Back side ring This will be described mainly with reference to FIGS. 9 and 10.
The back ring 51 has an annular portion 511. The back ring 51 includes a plurality of heat sink connecting portions 513 connected to the heat sink 33, a plurality of arm connecting portions 515 connected to the back end portion of the arm 53, and a plurality of reflector supports for supporting the reflector 37. It has a part 517.

(1-1) Circular portion The annular portion 511 has an annular shape. As shown in FIG. 10B, the annular portion 511 has a step 511a at the inner peripheral edge portion. The step 511a is a step whose inner peripheral edge is located on the back side. The step 511a corresponds to the step 331e of the heat sink 33, and when the heat sink 33 is mounted on the back ring 51 from the front side, the step 511a of the annular portion 511 fits into the step 331e of the heat sink 33. As a result, the heat sink 33 is positioned with respect to the back ring 51 in a direction other than the circumferential direction.
The inner peripheral diameter of the annular portion 511 is larger than the outer diameter of the LED unit 31 (mounting substrate 313) and the cover 35 (annular portion 351), and smaller than the outer diameter of the reflective portion 371 of the reflector 37. The outer diameter of the annular portion 511 is larger than the outer diameter of the reflector 37 (reflecting portion 371).

(1-2) Heat sink connecting portion There are three heat sink connecting portions 513 here, and they are provided at intervals in the circumferential direction. The heat sink connecting portion 513 has laterally stretched pieces 513a and 513b extending from the inner peripheral edge of the annular portion 511 to the center of the annular portion 511, and through holes 513c provided in the laterally stretched pieces 513a and 513b.
One of the plurality (3) laterally stretched pieces (the laterally stretched piece 513a) has a shape different from that of the other laterally stretched pieces when viewed from the back side. For example, the shape of the laterally stretched piece 513a when viewed from the back side is rectangular, and the shape of the laterally stretched piece 513b when viewed from the back side is a semi-elliptical shape.
The rectangular laterally stretched piece 513a corresponds to the recessed region 331f of the heat sink 33, and the two semi-elliptical laterally stretched pieces 513b correspond to the recessed region 331g of the heat sink 33. The stretch pieces 513a and 513b fit into the recessed regions 331f and 331g of the heat sink 33.
The through holes 513c of the laterally stretched pieces 513a and 513b correspond to the screw holes 331b and the screw holes 331c of the heat sink 33 recessed regions 331f and 331g. The back ring 51 and the heat sink 33 are coupled by the screw body 71 in a state where the laterally stretched pieces 513a and 513b are fitted into the recessed regions 331f and 331g of the heat sink 33.

(1-3) Arm connecting portion There are three arm connecting portions 515 here, and they are provided on the annular portion 511 at intervals in the circumferential direction. Each arm connecting portion 515 has a plurality of types of through holes 515a, 515b, and 515c. The arm connecting portion 515 is provided on the outer peripheral side of the annular portion 511.
The through hole 515a is for a connecting portion for connecting the arm 53 and the back ring 51. The connecting body used for the connection here is the screw body 73. The through holes 515b are formed at intervals in the circumferential direction with respect to the through holes 515a. The convex portion 531c of the arm 53 shown in FIG. 11 is inserted into the through hole 515b.
The through hole 515c is formed at a distance from the through hole 515a on the side opposite to the through hole 515b in the circumferential direction. The convex portion 531d of the arm 53 shown in FIG. 11 is inserted into the through hole 515c. The through hole 515c is for preventing the arm 53 from rotating around the central axis of the screw body 73 with respect to the back ring 51. Even if there is no through hole 515c, the rotation of the arm 53 is restricted if there is a through hole 515b and a convex portion 531c.
The through holes 515b and 515c have a rectangular shape here corresponding to the cross-sectional shape of the convex portions 531c and 531d of the arm 53. The shapes of the through holes 515b and 515c may be other than the rectangular shape, but it is better to correspond to the shapes of the convex portions 531c and 531d of the arm 53 (here, the rectangular shape). By making it correspond, the rattling of the back ring 51 of the arm 53 can be reduced.

(1-4) Reflector support portion There are three reflector support portions 517 here, and they are provided at intervals in the circumferential direction. The reflector support portion 517 has a vertically stretched piece 517a extending from the outer peripheral edge of the annular portion 511 to the front side, and a screw hole 517b provided in the vertically stretched piece 517a.
The vertically stretched piece 517a is provided substantially perpendicular to the annular portion 511. The vertically stretched piece 517a is located outside the stretched portion 373a of the mounting portion 373 of the reflector 37. As a result, a fixture (here, the screw body 75) that is inserted from the outside into the reflector 37 can be used.
The vertically stretched piece 517a is bent to the front side from a portion of the annular portion 511 that is slightly inserted in the radial direction from the outer peripheral edge of the portion where the reflector support portion 517 does not exist, in accordance with the position of the mounting portion 373 of the reflector 37. Has been done. Depending on the position of the mounting portion of the reflector, the vertically stretched piece may be formed by bending outside the outer peripheral edge of the portion where the support portion of the reflector does not exist. Further, the vertically stretched piece 517a here is bent at approximately 90 [°] with respect to the annular portion 511, but even if it is bent at an angle other than 90 [°] according to the position of the mounting portion of the reflector. Good.
The vertically stretched piece 517a has a plate shape and has the same thickness as the laterally stretched pieces 513a and 513b of the annular portion 511 and the heat sink connecting portion 513.
A burring hole is adopted as the screw hole 517b here. The screw hole 517b is tapped with respect to the burring hole. As a result, the screw body 75 that supports the reflector 37 can be fixed to the reflector support portion 517, and the reflector 37 can be supported without providing a screw hole in the reflector 37.

(2) Arm This will be described mainly with reference to FIGS. 9 and 11.
The arm 53 has a back side connecting portion 531 that connects to the back side ring 51, a front side connecting portion 533 that connects to the front side ring 55, and a connecting portion 535 that connects the back side connecting portion 531 and the front side connecting portion 533. The arm 53 is obtained by pressing a metal plate, and integrally has a back side connecting portion 531, a front side connecting portion 533, and a connecting portion 535. The arm 53 has a fixture mounting portion 537 to which the elastic fixture 57 is attached, in addition to the back side connecting portion 531 and the front side connecting portion 533 and the connecting portion 535.

(2-1) Backside connecting portion The backside connecting portion 531 has a screw hole 531b for a screw body 73 which is a connecting body. Specifically, the back side connecting portion 531 is formed on the facing plate portion (corresponding to an example of the "opposing plate portion" of the present invention) 531a and the facing plate portion 531a facing the surface of the annular portion 511 of the back side ring 51. It has a screw hole 531b provided. The screw hole 531b is tapped with respect to the burring hole.
The back side connecting portion 531 has convex portions 531c and 531d on both sides of the screw hole 531b in a direction corresponding to the circumferential direction of the annular portion 511 in the facing plate portion 531a. The convex portions 531c and 531d are bent to the back side at a portion corresponding to the end of the facing plate portion 531a in the metal plate.

The convex portion 531c is inserted into the through hole 515b of the arm connecting portion 515 of the back ring 51. The convex portion 531d is inserted into the through hole 515c of the arm connecting portion 515 of the back ring 51. The tips of the convex portions 531c and 531d have a shape that becomes thinner as they approach the back end. Here, it has a semicircular shape. This facilitates insertion of the convex portions 531c and 531d into the through holes 515b and 515c.
With the convex portions 531c and 531d inserted into the through holes 515b and 515c of the arm connecting portion 515, the screw body 73 inserts the through hole 515a of the arm connecting portion 515 from the back side and is screwed into the screw hole 531b. As a result, the arm 53 is connected to the back ring 51 without rotating around the central axis of the screw body 73. Further, the facing plate portion 531a abuts on the annular portion 511 of the back ring 51 and is connected in a stable state.

(2-2) Front-side connecting portion The front-side connecting portion 533 has a through hole 533a for a connecting tool. The fixture used for the connection here is the rivet body 77. As a specific example, the through hole 533a is provided in a region close to the front end portion of the flat plate portion 536 extending in the front and back directions. The flat plate portion 536 has a long elongated shape in the front-back direction (the direction in which the back-side ring 51 and the front-side ring 55 are connected). The longitudinal direction of the arm 53 (corresponding to the longitudinal direction of the flat plate portion 536) substantially coincides with the front and back directions of the illuminating device 1, and the lateral direction of the arm 53 (corresponding to the lateral direction of the flat plate portion 536) is the back side. It substantially coincides with the circumferential direction of the ring 51 and the front ring 55.
The front side connecting portion 533 has an end facing portion in which the arm connecting portion 553 (longitudinal extending piece 553a) of the front side ring 55, which will be described later, abuts (or is close to) the end portion in the lateral direction of the arm 53. Thereby, it is possible to regulate the arm 53 from rotating in the circumferential direction of the front ring 55 with respect to the front ring 55.
Here, the end-opposing portion is composed of a pair of side plate portions 538 that are erected from both sides of the flat plate portion 536 in the lateral direction. The side plate portion 538 is erected toward the center of the front ring 55.
The distance between the inner surfaces of the pair of side plate portions 538 corresponds to the circumferential dimension of the vertically stretched piece of the front ring 55. The side plate portion 538 also has an effect as a rib that enhances the mechanical properties of the arm 53 with respect to the connecting portion 535.

The front side connecting portion 533 has a surface facing portion in which the arm connecting portion 553 (longitudinal extending piece 553a) of the front side ring 55, which will be described later, abuts (or is close to) both main surfaces in the thickness direction of the arm 53. Thereby, the arm 53 can be restricted from moving in the radial direction of the front ring 55 with respect to the front ring 55.
One of the surface-facing portions is a surface 533c that is the front end of the pair of side plate portions 538 and faces the flat plate portion 536 via a groove portion 533b provided on the flat plate portion 536 side. A vertically stretched piece 553a of the front ring 55, which will be described later, is inserted into the groove portion 533b from the front side, and the overhanging portion 553d serves as a stopper for regulating the insertion depth. Here, the side plate portions 538 are present at both ends of the flat plate portion 536 in the lateral direction, and the groove portions 533b are also provided in each side plate portion 538. That is, there are two groove portions 533b.
The other side of the surface facing portion is the inner surface of the flat plate portion 536. Here, one of the surface facing portions is the inner surface of the rib 533d formed on the flat plate portion 536. The rib 533d projects inward and extends along the longitudinal direction of the flat plate portion 536. The ribs 533d are provided on both sides of the flat plate portion 536 in the lateral direction with respect to the through hole 533a. That is, there are two ribs 533d. The rib 533d is formed by U-bending or V-bending. By providing a pair of ribs 533d and 533d on both sides of the through hole 533ab, even if the vertically stretched piece 553a of the front ring 55 has an arc shape when viewed from the back side, the vertically stretched piece 553a can be moved to the arm 53 without rattling. Can be combined with.

(2-3) Connection portion The connection portion 535 is composed of the above-mentioned flat plate portion 536. The flat plate portion 536 is connected to the facing plate portion 531a of the back side connecting portion 531 at the back side end (the end on the side where the back side ring 51 exists). Here, one end of a long metal plate is bent, the bent portion is the facing plate portion 531a, and the unbent portion is the flat plate portion 536. The bending angle is determined by the position and size of the back ring 51 and the front ring 55 when the lighting device 1 is viewed from the back side. As an example, the bending angle is 90 [°].

(2-4) Fixture mounting portion The fixture mounting portion 537 has a through hole 533a for the rivet body 77. Specifically, it is provided at the front end (the end on the side where the front ring 55 exists) of the outer surface of the flat plate portion 536 (the side opposite to the side where the center of the front ring 55 exists). .. The through hole 533a is also used as the through hole 533a of the front side connecting portion 533. That is, the rivet body 77 is used to connect the arm 53, the elastic fixture 57, and the front ring 55.
The fixture mounting portion 537 has a pair of stretched portions 537a and 537b extending outward from the lateral end of the flat plate portion 536. The distance between the pair of stretched portions 537a and 537b coincides with the width of the elastic fixture 57 coupled to the portion (the dimension is the same as the circumferential direction of the front ring 55). This makes it possible to prevent the elastic fixture 57 from rotating around the central axis of the rivet body 77 with the elastic fixture 57 attached.

(3) Front Ring A description will be given mainly with reference to FIGS. 9 and 12.
The front ring 55 has an annular portion 551. The front ring 55 has a plurality of arm connecting portions 553 that are connected to the end portion of the arm 53.

(3-1) Circular portion The annular portion 551 has an annular shape. The inner peripheral edge of the annular portion 551 has a step 551a. The step 551a is a step whose inner peripheral edge is located on the back side. The outer collar 371b of the reflecting portion 371 of the reflector 37 is located on the step 551a. This makes it possible to improve the design. The step 551a is configured so as not to come into contact with the outer collar 371b of the reflecting portion 371. As a result, it is possible to suppress the heat transferred from the heat sink 33 to the front ring g55 via the back ring 51 and the arm 53 to the reflector 37.
The outer peripheral edge of the annular portion 551 is a curved portion 551b that is curved to the back side. As a result, it is possible to prevent the gap between the installation surface and the installation surface from becoming conspicuous.

(3-2) Arm connecting portion There are three arm connecting portions 553 here, and they are provided at intervals in the circumferential direction. The arm connecting portion 553 has a vertically stretched piece (corresponding to an example of the "stretched piece" of the present invention) 553a extending to the back side, and a through hole 553b provided in the vertically stretched piece 553a.
The arm connecting portion 553 may have a tubular portion 553c between the vertically stretched piece 553a and the annular portion 551. That is, a plurality of (for example, three) vertically stretched pieces 553a are stretched from the back side end to the back side at intervals in the circumferential direction of the tubular portion 553c.
The circumferential dimension of the back side end (the end on the side where the back side ring 51 exists) of the vertically stretched piece 553a corresponds to the distance between the inner surfaces of the pair of side plate portions 538 of the arm 53. That is, the side surface of the back side end portion of the vertically stretched piece 553a (the end surface in the direction orthogonal to the stretching direction and the thickness direction of the vertically stretched piece 553a, which corresponds to an example of the "end facing surface" of the present invention) is shown in FIG. As shown in (b) of 14, it comes into contact with the inner surfaces of the pair of side plate portions 538.

The arm connecting portion 553 has an overhanging portion 553d of the vertically stretched piece 553a that projects in the circumferential direction from the middle in the stretching direction. Here, the arm connecting portion 553 has a pair of overhanging portions 553d. The overhanging portion 553d is inserted from the front side into the groove portion 533b existing at the front side end of the side plate portion 538 of the arm 53. At this time, the outer surface of the vertically stretched piece 553a of the arm connecting portion 553 is supported by the pair of ribs 533d of the arm 53. The dimension between the overhanging portion 553d and the tubular portion 553c of the vertically stretched piece 553a is smaller (constricted) in the direction orthogonal to the stretching direction than the back side portion of the vertically stretched piece 553a.

(4) Elastic Fixture This will be described mainly with reference to FIGS. 9 and 13.
The elastic fixture 57 is configured by using, for example, a leaf spring. The elastic fixture 57 includes, for example, a leaf spring portion 571 having a shape close to a "V" or "L" shape, and an arm mounting portion 573 that extends from one end of the leaf spring portion 571 to the back side and is attached to the arm 53. Have.
The arm mounting portion 573 has a flat plate portion 573a extending in the front-back direction and a through hole 573b. The through hole 573b is for the rivet body 77. The dimension (width) of the flat plate portion 573a in the lateral direction is equal to the distance between the inner surfaces of the pair of extended portions 537a and 537b of the arm 53. The flat plate portion 573a is provided with a pair of ribs 573c extending in the front-back direction.

<Second embodiment>
This will be described with reference to FIG.
The lighting device 1A according to the second embodiment has a different arm and reflector as compared with the lighting device 1 according to the first embodiment. Therefore, the lighting device 1A according to the second embodiment will be mainly described with respect to the arm 53A and the reflector 37A, and the other configurations will be described by using the reference numerals of the configurations described in the first embodiment as they are. Omit.
The lighting device 1A includes a light source unit 3A including the LED 311 as a light source, and a support unit 5A including the arm 53A. The light source unit 3A includes at least an LED unit 31 and a heat sink 33, but here, a cover 35 and a reflector 37A are provided.
The reflector 37A has a reflector 371A and an attachment portion 373A for attaching the reflector 37A to the support portion 5A.
The reflective portion 371A has a shape similar to a hollow spherical band or a cylinder. The inner peripheral surface 371Aa of the reflecting portion 371A is a reflecting surface. The reflecting portion 371A has an outer collar 371Ab protruding outward at the front end. The reflective portion 371A has an inner collar 371Ac that projects inward at the back end.

The mounting portion 373A has a stretched portion 373Aa extending from the overhanging source of the inner collar 371Ac of the reflecting portion 371A (which is the back end of the reflecting portion 371A) to the back side, and a through hole 373Ab provided in the stretched portion 373Aa. ing. The stretched portion 373Aa here extends in a plate shape.
The through hole 373Ab is for a fixture fixed to the reflector support portion 517 of the support portion 5A. The through hole 373Ab is larger than the threaded portion of the threaded body 75 and has an elongated hole shape that is long in the circumferential direction of the reflector 37A.
The reflector 37A has a stretched portion 374A extending from the overhanging source of the inner collar 371Ac of the reflecting portion 371A to the back side, and a convex portion 373Ac provided on the stretched portion 374A. The convex portion 373Ac fits into the chipped portion 331d of the base portion 331 of the heat sink 33.

The reflector 37A has a plurality of (three here) extending portions 376A extending from the inner collar 371Ac of the reflecting portion 371A to the back side at intervals in the circumferential direction. As a result, the contact area between the heat sink 33 and the reflecting portion 371A can be reduced.

<Modification example>
Although the lighting device according to the embodiment has been described above, the lighting device is not limited to this embodiment, and may be, for example, the following modification. Further, the embodiment, the modified example, and the modified example may be combined.
Further, even if there is an example not described in the embodiment or the modified example, or a design change within a range not deviating from the gist, the present invention is included.

1. 1. Light source unit (1) LED unit The mounting substrate constituting the LED unit is not limited to a circular shape, and may be, for example, a polygonal shape such as a triangular shape or a square shape. Although the plurality of LEDs constituting the LED unit are arranged in a regular matrix, they may be arranged in a matrix in which the number of rows and the number of columns are different, they may be arranged concentrically, or the center may be centered. It may be arranged in a plurality of polygonal rings having the same value.

(2) Heat sink In the heat sink 33 of the first embodiment, the back surface side of the base portion 331 is attached to the back side ring 51, but the surface having the area where the LED unit is arranged may be attached to the back side ring. The end face of the plate-shaped base may be attached to the back ring.

(3) Reflectors The reflectors 37, 37A in the first embodiment and the second embodiment are attached to the back ring 51 so as to reduce contact with the heat sink 33 and the support portions 5, 5A. Thereby, for example, the reflector can be constructed of a resin material having low heat resistance. Further, by reducing the contact between the heat sink and the reflector, air flows in the gap generated between the heat sink and the reflector, and the heat dissipation of the heat sink can be improved. Further, by reducing the contact between the heat sink and the reflector, it is not necessary to consider the thermal deformation of the reflector caused by the difference in thermal expansion between the heat sink and the reflector during lighting.
When the reflector is made of a material having high thermal conductivity, the contact area between the heat sink and the reflector may be positively increased. As a result, heat conduction to the reflector is increased, and heat dissipation of the light source portion can be improved.
The reflector 37 of the first embodiment is supported by the screw body 75 (not screwed with the screw portion of the screw body), but may be fixed by, for example, a screw body or a rivet body. That is, the attachment of the reflector to the back ring includes a case where it is supported by a screw body, a pin body, or an engaging means, or a case where it is fixed by a screw body or a rivet body.

2. Support portion (1) Back side ring The back side ring 51 of the first embodiment has a circular shape, but may have an annular shape (ring shape) of another shape, for example. Other shapes include polygons such as triangles, ellipses, and oval shapes.
The laterally stretched pieces 513a and 513b of the heat sink connecting portion 513 in the first embodiment are stretched in a plate shape from the annular portion 511, but may be continuously stretched in the circumferential direction to form an annular shape as a whole. ..
The vertically stretched piece 517a of the reflector support portion 517 in the first embodiment extends in a plate shape from the annular portion 511, but may be continuously stretched in the circumferential direction to form a tubular shape as a whole. ..

(2) Connecting tool The connecting tool (arm) 53 of the first embodiment is not limited to three if there are a plurality of connecting tools (arms) 53. If there are three or more, the front ring and the back ring can be connected in a stable state. As a result, the weight can be reduced by connecting the front side ring and the back side ring with a plurality of connecting portions. In addition, air flow can easily occur around the heat sink.
The end facing portion of the connecting tool (arm) 53 was composed of the facing surfaces of the pair of side plate portions 538, but it may be an island-shaped protruding portion provided on the facing surface of the side plate portions, or the front ring. The ribs may be continuous in the stretching direction of the stretched piece (longitudinal stretched piece).
The surface facing portion of the connecting portion (arm) 53 was composed of a rib 533d of the flat plate portion 536 and a surface 533c facing the flat plate portion 536 via the groove portion 533b of the side plate portion 538, but the portions facing each other. It is not necessary to use ribs and grooves. For example, the surface of the flat plate portion may be used as it is instead of the rib. Even if a stretched piece (locking piece) extending inward from the side plate portion in a direction orthogonal to the stretching direction and the thickness direction of the stretching piece (longitudinal stretching piece) of the front ring is used instead of the facing surface using the groove. Good.

(3) Front side ring The front side ring 55 of the first embodiment has a circular shape according to the opening shape of the installation surface. However, for example, when the opening shape has a shape other than a circular shape, the front side ring The shape of may also match other shapes.
The front ring has a shape that matches the opening shape, but it may be a shape that can hide the opening edge. For example, when the opening shape is circular, the outer peripheral shape is a polygonal ring shape such as a quadrangular shape. You may. The inner peripheral shape is not limited to the circular shape, and may be different from the outer peripheral shape.

(4) Elastic Fixture Although the elastic fixture 57 of the first embodiment has the leaf spring portion 571, it may be prevented from falling from the opening of the lighting device by another method. As another method, for example, a claw method may be used as shown in FIG.
The claw method is configured by inserting the hooking claw body 517B into the vertical groove 53Bb extending from the insertion hole 53Ba of the arm 53B to the front side. The hooking body 517B is locked around the opening of the installation surface by utilizing the elastic force of the leaf spring 517Ba.
3. 3. Lighting device The installation surface to which the lighting device is fixed by using the opening may be, for example, a ceiling or a wall.

1 Lighting device 3 Light source part 5 Support part 31 LED unit 33 Heat sink 35 Cover 37 Reflector 51 Back side ring 53 Arm (connector)
55 Front ring

Claims (4)

A light source portion that irradiates light on the front side using an LED as a light source and a support portion that supports the light source portion are provided, and the light source portion and the back side portion of the support portion are embedded in an installation surface provided with an opening for embedding. In the installed lighting device
The light source unit includes an LED unit, a heat sink, and a reflector.
The support portion includes a back side ring located on the back side of the installation surface, a front side ring located on the front side of the installation surface, and a connecting tool for connecting the back side ring and the front side ring.
The LED unit is attached to the front side of the heat sink.
The heat sink is attached to the back ring and
The outer diameter of the front ring is larger than the outer diameter of the back ring.
The inner diameter of the back ring is smaller than the outer diameter of the reflector.
The back ring has stretched pieces extending outward from sites spaced in the circumferential direction of the back ring.
The reflector has a tubular reflecting portion and a stretched portion extending from the reflecting portion to the back side, and the stretched portion of the reflector and the stretched piece of the back side ring are fixed to each other.
The front ring has a first step portion on the inner peripheral edge portion, and has a first step portion.
The reflector has an outer collar portion formed at the front end of the reflector.
The reflector is attached to the back ring in a state where the outer collar portion does not contact the first step portion.
The connecting tool is a lighting device having a bent portion between a fixed position with the front ring and a fixed position with the back ring. The lighting device according to claim 1 , wherein the stretched piece is located on the outer peripheral side of the stretched portion of the reflector. The lighting device according to claim 2 , wherein the diameter of the inner peripheral surface of the stretched portion of the reflector is larger than the diameter of the outer peripheral surface of the heat sink. The lighting device according to any one of claims 1 to 3, wherein the front ring has a curved portion curved to the back side on an outer peripheral edge portion.

Images