WO2013190751A1

WO2013190751A1 - Lighting apparatus

Info

Publication number: WO2013190751A1
Application number: PCT/JP2013/002163
Authority: WO
Inventors: 裕亮田島; 有士中川
Original assignee: パナソニック株式会社
Priority date: 2012-06-21
Filing date: 2013-03-29
Publication date: 2013-12-27
Also published as: JP5879525B2; JP2014006989A; CN204345440U; TW201408932A; TWI497011B

Abstract

This lighting apparatus is provided with a lamp fitting, a heat dissipating section, an electric wire inserting hole, and an electric wire cover. The lamp fitting has a first surface and a second surface, which are positioned on the opposite sides in the thickness direction, and the first surface is provided with a light source region for disposing a light source. The heat dissipating section is disposed on the second surface of the lamp fitting. The electric wire inserting hole is configured so as to penetrate the lamp fitting from the first surface to the second surface to pass through the electric wire that is electrically connected to the light source. The electric wire cover faces the second surface so as to cover the electric wire inserting hole. The electric wire cover and the electric wire inserting hole are disposed at positions not overlapping the light source region in the thickness direction of the lamp fitting.

Description

lighting equipment

The present invention relates to a lighting fixture.

Conventionally, for example, as shown in Document 1 (Japanese Published Patent Application No. 2011-216313), a substrate on which a light emitting diode is mounted and a substrate that is flat in the vertical direction and fixed on the lower side are fixed. There is provided a lighting fixture including a heat sink (lamp) having a substrate housing portion and a heat radiating fin projecting above the substrate housing portion.

In the lighting fixture as described above, the electric wire connected to the light emitting diode is drawn out to the upper side of the substrate housing portion through the wire insertion hole provided in the substrate housing portion.

Also, in order to prevent foreign matter from entering the wire insertion hole, a wire cover that covers the wire insertion hole from above is attached to the lamp.

However, if the distance between the substrate on which the light-emitting diode, which is a heat source, is mounted and the wire cover is short, the heat dissipation is relatively lowered due to the heat dissipation being blocked by the wire cover. That is, in a lighting fixture, there exists a possibility that an electric wire cover may reduce the heat dissipation of a lighting fixture.

The present invention has been made in view of the above-described reasons, and an object thereof is to improve the heat dissipation of a lighting fixture including an electric wire cover.

The 1st form of the lighting fixture which concerns on this invention is equipped with a lamp, a thermal radiation part, an electric wire penetration hole, and an electric wire cover. The lamp has a first surface and a second surface located on opposite sides in the thickness direction, and includes a light source region for arranging a light source on the first surface. The heat radiating portion is installed on the second surface of the lamp. The electric wire insertion hole is configured to pass an electric wire that penetrates the lamp from the first surface to the second surface and is electrically connected to the light source. The electric wire cover faces the second surface so as to cover the electric wire insertion hole. The electric wire cover and the electric wire insertion hole are arranged at positions that do not overlap the light source region in the thickness direction of the lamp.

The 2nd form of the lighting fixture which concerns on this invention is equipped with the electric wire storage chamber which accommodates a part of said electric wire in the said 2nd surface of the said lamp in the 1st form. The electric wire storage chamber is formed by a wall protruding from the second surface and surrounding the electric wire insertion hole and the second surface. The electric wire cover is disposed on the wall so as to cover the electric wire storage chamber. The electric wire storage chamber is formed at a position that does not overlap the light source region in the thickness direction of the lamp.

A third form of a lighting fixture according to the present invention is the second form, wherein a hooking convex portion is provided in the wire housing chamber, and a wire insertion notch is provided in the wall. The electric wire insertion notch is configured to pass the electric wire. The hook protrusion is disposed on the opposite side of the wire insertion notch with respect to the wire insertion hole, and is spaced apart from the wall so as to form a space for passing the wire between the wall and the wall. The

In the fourth form of the lighting fixture according to the present invention, in the third form, the heat radiating portion is composed of a plurality of heat radiating fins protruding from the second surface.

In the 5th form of the lighting fixture which concerns on this invention, in the 4th form, the said radiation fin in the other side of the said light source area with respect to the said electric wire storage chamber is the said light source area side with respect to the said electric wire storage chamber. The height is smaller than the heat dissipating fin.

In the 6th form of the lighting fixture which concerns on this invention, in the 4th or 5th form, the radiation fin nearest to the said electric wire insertion notch among these radiation fins opposes the said electric wire insertion notch. Placed in.

In a seventh aspect of the lighting fixture according to the present invention, in any of the fourth to sixth aspects, the wall is smaller in height than the radiation fin closer to the light source region than the wall.

In the eighth aspect of the lighting fixture according to the present invention, in any one of the fourth to seventh aspects, the radiating fin is plate-shaped.

In a ninth aspect of the lighting fixture according to the present invention, in any one of the first to eighth aspects, the light source region includes the light source. The light source includes a light emitting element and a substrate on which the light emitting element is mounted.

BRIEF DESCRIPTION OF THE DRAWINGS The lighting fixture of one Embodiment which concerns on this invention is shown, (a) is a top view, (b) is the sectional view on the AA line of (a). It is sectional drawing which shows the lighting fixture of one Embodiment. It is a perspective view which shows the lighting fixture of one Embodiment. The lighting fixture of one Embodiment is shown, (a) is a top view, (b) is a front view. It is a disassembled perspective view which shows the lighting fixture of one Embodiment. It is a disassembled perspective view which shows the lighting fixture of one Embodiment. It is an enlarged plan view which shows the electric wire storage room with which the said lighting fixture is provided.

Hereinafter, a lighting apparatus according to an embodiment of the present invention will be described with reference to FIGS. Below, it demonstrates on the basis of the up-down direction of FIG.1 (b), and the left-right direction as an up-down direction and a left-right direction of a lighting fixture, respectively. That is, the description will be made on the assumption that the left-right direction of the luminaire matches the left-right direction in FIG. Further, the description will be made assuming that the vertical direction of the luminaire matches the vertical direction in FIG. In addition, the vertical direction in FIG. 1A (direction perpendicular to the paper surface in FIG. 1B) is referred to as the front-rear direction in FIG. Here, the front side of the paper surface in FIG. 1B is the front side of the lighting device, and the rear side of the paper surface in FIG. 1B is the rear side of the lighting device.

The lighting fixture of this embodiment includes a substrate 11 on which a light emitting diode (light emitting element) 10 is mounted, and a lamp 2 on which the substrate 11 is fixed. That is, the lighting fixture of the present embodiment includes the lamp 2. The lamp 2 has a first surface 2a and a second surface 2b located on opposite sides in the thickness direction (the direction perpendicular to the paper surface in FIG. 1A; the vertical direction in FIG. 1B). In the present embodiment, the first surface 2 a and the second surface 2 b are orthogonal to the thickness direction of the lamp 2. The lamp 2 includes a light source region 13 for arranging a light source on the first surface 2a. In FIG. 1A, the light source region 13 provided on the first surface 2a is shown as a region surrounded by a broken line. And in this embodiment, a lighting fixture equips the light source area | region 13 with the said light source. The light source includes a light emitting element 10 and a substrate 11 on which the light emitting element 10 is mounted.

In FIG. 1B, the lamp 2 has a flat board housing portion 21 whose thickness direction is directed in the vertical direction, and heat radiation that protrudes from the upper surface (second surface of the lamp 2) 2b of the board housing portion 21. Part 22 (many heat radiation fins 220). That is, the lighting fixture includes the heat radiating portion 22 on the second surface 2 b of the lamp 2. The heat radiating portion 22 includes a plurality of heat radiating fins 220 protruding from the second surface 2b. The material of the lamp 2 is preferably a material having high thermal conductivity, and for example, a metal such as aluminum can be used.

1B, the substrate 11 is fixed to the central portion of the lower surface (first surface of the lamp 2) 2a of the substrate housing portion 21 with the surface on which the light emitting diode 10 is mounted facing downward. More specifically, with reference to FIG. 5 (an exploded perspective view of the lighting fixture as seen from the first surface 2a side of the lamp 2), the substrate 11 is screwed and fixed to the substrate accommodating portion 21 of the lamp 2, respectively. The three plate springs 12 are pressed against the lower surface of the substrate housing portion 21.

Further, as shown in FIG. 3, the light emitting diode 10 is electrically connected to a power supply device 5 that generates appropriate DC power for lighting the light emitting diode 10 through an electric wire 51. That is, the light emitting element 10 is electrically connected to the power supply device 5 that applies a voltage to the light emitting element 10 through the electric wire 51. That is, the electric wire 51 is configured to be electrically connected to the light source.

Further, in FIG. 1 (b), an electric wire insertion hole 20 through which the electric wire 51 is inserted penetrates the substrate housing portion 21 in the vertical direction. In FIG. 3, the electric wire 51 is drawn out upward of the lamp 2 shown in FIG. 3 through the electric wire insertion hole 20 and connected to the power supply device 5. That is, the lighting fixture includes the electric wire insertion hole 20. The electric wire insertion hole 20 penetrates the lamp 2 from the first surface 2a to the second surface 2b. That is, the electric wire insertion hole 20 penetrates the lamp 2 in the thickness direction. The electric wire insertion hole 20 is configured to pass the electric wire 51.

The lighting fixture includes an electric wire cover 6 facing the second surface 2b so as to cover the electric wire insertion hole 20. In FIG. 1A, for the sake of explanation, the lighting fixture with the electric wire cover 6 removed is shown, and the region where the electric wire cover 6 is installed is indicated by a region surrounded by a two-dot chain line. The electric wire cover 6 and the electric wire insertion hole 20 are arranged at positions that do not overlap the light source region 13.

Further, as shown in FIG. 1B, a cylindrical encircling portion 23 surrounding the substrate 11 protrudes downward from the lower surface of the substrate accommodating portion 21 (the first surface 2a of the lamp 2). Radiating fins 231 also project from the outer peripheral surface of the portion 23. That is, in this embodiment, the lighting fixture includes the heat radiating portion 22 not only on the second surface 2b of the lamp 2 but also on the first surface 2a.

Further, as shown in FIG. 2, a reflection plate 31 for reflecting the light of the light emitting diode 10 downward is housed in the enclosure 23. In addition, the up-down direction of FIG. 2 corresponds with the up-down direction of FIG.1 (b). The reflector 31 has a cylindrical shape that surrounds the light emitting diode 10 when viewed from below, and is inclined so that a cross-sectional shape in a cross section perpendicular to the vertical direction gradually increases downward. That is, in the reflector 31, the shape of the cross section perpendicular to the thickness direction of the lamp 2 (vertical direction in FIGS. 1B and 2) gradually increases in the direction away from the lamp 21 (downward in FIG. 2). It is configured as follows. The upper opening of the reflecting plate 31 is closed by the substrate 11, and the lower opening of the reflecting plate 31 is closed by a light transmitting cover 32 made of a light transmitting material (for example, glass). The reflector 31 and the translucent cover 32 are each fixed to the lamp 2 by, for example, screwing.

Further, as shown in FIG. 2, the lamp 2 is fixed to the instrument body 4. The fixture body 4 is a housing of a lighting fixture. The instrument main body 4 has a cylindrical main body portion 41 that opens upward and downward as a whole. The main body 41 holds the lamp 2 such that the upper end of the lamp 2 protrudes upward and the translucent cover 32 is exposed downward.

Here, the lighting fixture of this embodiment is demonstrated using FIG. The left-right direction, the up-down direction, and the vertical direction on the drawing in FIG. 4A are shown to be the same as the left-right direction, the up-down direction, and the vertical direction on the drawing in FIG. In addition, the left-right direction, the up-down direction, and the vertical direction on the drawing in FIG. 4B are illustrated in correspondence with the left-right direction, the up-down direction, and the vertical direction on the drawing in FIG. The heat dissipating part 22 has a dimension and shape that does not protrude from a predetermined circular shape that encloses the substrate housing part 21 when viewed from the thickness direction of the lamp 2 (perpendicular to the plane of FIG. 4A; vertical direction in FIG. 4B). Has been. That is, the heat radiation part 22 (heat radiation fin 220) protrudes from the 2nd surface 2b so that it may not protrude from the outer edge of the lamp 2 in the planar view which looked at the lamp 2 from the thickness direction. In the present embodiment, the heat radiating part 22 (heat radiating fin 220) protrudes from the second surface 2b along the normal direction of the second surface 2b. That is, the heat radiation part 22 (heat radiation fin 220) protrudes from the second surface 2b along the thickness direction of the lamp 2. At both ends of the lamp 2 in the horizontal direction (left and right direction in FIG. 1 (a)), the thickness direction protrudes from the circular shape in the vertical direction in FIGS. 1 (b) and 4 (b), respectively. A mounting piece 24 is provided. A circular insertion hole 40 slightly larger than the above circular shape is provided on the upper surface of the main body 41 of the fixture body 4, and the lamp 2 is screwed with the mounting piece 24 against the peripheral edge of the insertion hole 40. It is fixed to the instrument body 4 by being stopped. That is, the heat radiating portion 22 that protrudes upward from the mounting piece 24 in the lamp 2 protrudes above the fixture body 4.

Further, as shown in FIG. 4 (b), in the instrument main body 4, a collar portion 42 is projected outward from the lower end of the outer peripheral surface of the main body portion 41 over the entire circumference. Furthermore, in the instrument main body 4, a plurality (three in the figure) that can be elastically displaced with respect to the main body 41 so as to reduce the projecting dimension from the main body 41 on the outer peripheral surface of the main body 41. The sandwiching portions 43 are provided at regular intervals in the circumferential direction (for example, approximately every 120 °). The fixture body 4 is, for example, embedded in an embedded hole (not shown) provided in the ceiling to which the lighting fixture is attached, and is sandwiched between the peripheral portion of the embedded hole and the upper surface of the ceiling material. Dropping downward is prevented by contacting 43. Further, when viewed from below the ceiling, a gap between the outer peripheral surface of the main body 41 and the inner peripheral surface of the embedding hole is covered with the flange portion 42.

Hereinafter, the electric wire storage chamber 25 which is provided on the upper side of the substrate storage portion 21 (the second surface 2b of the lamp 2) in the lamp 2 and stores a part of the electric wire 51 will be described with reference to FIGS. explain. FIG. 6 is an exploded perspective view of the lighting fixture as seen from the second surface 2 b of the lamp 2. FIG. 7 is an enlarged plan view of the electric wire storage chamber 25. The lighting fixture includes an electric wire storage chamber 25 on the second surface 2 b of the lamp 2. The electric wire storage chamber 25 stores a part of the electric wire 51.

The electric wire storage chamber 25 is surrounded by the heat radiation fins 220 (walls 253) whose upward projecting dimensions from the substrate housing portion 21 are relatively smaller than the projecting dimensions of the heat radiation fins 220 a closer to the light source region 13 than the electric wire storage chamber 25. It is formed by being covered with the electric wire cover 6. That is, the electric wire storage chamber 25 is formed by the second surface 2 b and the wall 253. In other words, the electric wire storage chamber 25 is defined by the wall 253 and the second surface 2b. The wall 253 protrudes from the second surface 2b so as to surround the electric wire insertion hole 20. That is, the electric wire insertion hole 20 is provided in the electric wire storage chamber 25. In other words, the electric wire insertion hole 20 and the electric wire storage chamber 25 are connected. The wire cover 6 is disposed on the wall 253 so as to cover the wire storage chamber 25. In other words, the wall 253 forms an opening facing the wire insertion hole 20 at the other end facing the one end in contact with the second surface 2b, and the wire cover 6 is placed on the wall 253 so as to cover the opening. Placed in. The electric wire storage chamber 25 is formed at a position that does not overlap the light source region 13 in the thickness direction of the lamp 2. In the present embodiment, the electric wire storage chamber 25 has a rectangular shape in a plan view as viewed from the thickness direction of the lamp 2, and has a rectangular shape that is long to the left and right as shown in FIG. The surface of the radiating fin 220 in the protruding direction has an open structure.

In this embodiment, the wall 253 has a height H smaller than that of the heat radiation fin 220a on the light source region 13 side with respect to the electric wire storage chamber 25. In other words, the wall 253 is lower than the heat radiation fin 220a. Here, as shown in FIG. 1 (b), the height H refers to a member projecting from the second surface 2b (wall 253, radiating fin 220, hook projection 251 described later) from the second surface 2b. This is the distance to the end opposite to the second surface 2b. In other words, the height H is the protruding height of the member protruding from the second surface 2b.

In the present embodiment, the wall 253 is formed by the heat radiation fins 220. The electric wire insertion hole 20 is open at the inner end of the electric wire storage chamber 25 and closer to the center.

Also, the heat dissipating fins 220 on the front side in FIG. 1B of the electric wire housing chamber 25 have a relatively small projecting dimension upward from the board housing portion 21. That is, the height H of the radiating fin 220 b on the opposite side of the light source region 13 with respect to the electric wire storage chamber 25 is smaller than the radiating fin 220 a on the light source region 13 side with respect to the electric wire storage chamber 25. In other words, the radiation fin 220b is lower than the radiation fin 220a.

And as above-mentioned, the protrusion dimension of the radiation fin 220 upwards from the board | substrate accommodating part 21 is made smaller than the other site | part in the circumference | surroundings and the front side (namely, the side opposite to the board | substrate 11) of the electric wire storage chamber 25. When the electric wire 51 is routed, the heat radiating fins 220 do not easily get in the way, and workability is ensured.

Moreover, the electric wire cover 6 which is a rectangular flat plate which covers the electric wire storage chamber 25 as viewed from above is attached to the lamp 2 by, for example, screwing. In the present embodiment, a step 252 that further reduces the protrusion dimension is provided on the heat radiation fin 220 whose protrusion dimension upward from the substrate housing portion 21 is relatively small so as to surround the electric wire storage chamber 25. The electric wire cover 6 is placed on the step 252 and covers the opening of the electric wire storage chamber 25. Moreover, in the part which comprises the wall 253 (the left side in FIG. 1) of the electric wire storage chamber 25 in the heat radiating part 22, the lower surface (the surface facing the second surface 2b) of the electric wire cover 6 is provided as a gap through which the electric wire 51 is inserted. A wire insertion notch 250 is provided at a portion in contact with (). That is, the lighting fixture of the present embodiment includes the electric wire insertion notch 250 on the wall 253. The electric wire insertion notch 250 is configured to pass the electric wire 51. In the present embodiment, the wire insertion notch 250 is formed in a portion of the wall 253 that contacts the wire cover 6. Further, in the electric wire storage chamber 25, the electric wire 51 is hooked on the right side in FIG. 1 and FIG. 7 from the electric wire insertion hole 20 (that is, on the opposite side of the electric wire insertion notch 250 with respect to the electric wire insertion hole 20) as shown in FIG. A hooking convex portion 251 is provided. That is, the lighting fixture of this embodiment includes the hooking convex portion 251 in the electric wire storage chamber 25. The hooking convex portion 251 is arranged on the opposite side of the wire insertion notch 250 with respect to the wire insertion hole 20. That is, the electric wire insertion notch 250, the electric wire insertion hole 20, and the hooking convex portion 251 are arranged in this order along the left-right direction of FIG. 1 (a) and FIG. 1 (b). The electric wire insertion notch 250 is arranged separately from the wall 253 so as to form a space through which the electric wire 51 passes. In other words, the electric wire insertion notch 250 is disposed so as to form a space larger than the thickness of the electric wire 51 between the electric wire insertion notch 250 and the wall 253. The electric wire 51 is arranged such that one end passes through the electric wire insertion hole 20 and the other end passes through the electric wire insertion notch 250. A portion between both ends of the electric wire 51 is stored in the electric wire storage chamber 25.

In the present embodiment, the hooking convex portion 251 protrudes from the second surface 2b. The hooking convex portion 251 has a height H smaller than that of the wall 253. That is, the hook convex portion 251 is lower than the wall 253. Thereby, in the lighting fixture provided with the hook convex part 251, the surface facing the 2nd surface 2b can cover the electric wire storage chamber 25 using the flat electric wire cover 6. FIG.

Here, on the outside of the electric wire insertion notch 250 (left side in FIG. 7), the heat radiation fin 220c closest to the electric wire insertion notch 250 has a thickness direction in the opening direction of the electric wire insertion notch 250 (the left-right direction in FIG. 7). It is arranged toward. That is, among the plurality of heat radiation fins 220, the heat radiation fin 220 c closest to the wire insertion notch 250 outside the wire storage chamber 25 is disposed so as to face the wire insertion notch 250. And the electric wire 51 pulled out from the electric wire insertion notch 250 is pulled out ahead (downward in FIG. 7) in FIG.1 (b) along the radiation fin 220c. That is, since the electric wire 51 is bent outside the electric wire storage chamber 25 (at least after being pulled out from the electric wire insertion notch 250), for example, the electric wire insertion notch 250 is (front in FIG. 1B; FIG. 7). Compared with the case where the wire 51 is opened downward), a large frictional force is generated between the electric wire 51 and the inner surface of the electric wire insertion notch 250, and the electric wire 51 is tensioned by this frictional force. In addition, the electric wire storage chamber 25 is closed by the electric wire cover 6, so that foreign matters (dust, insects, etc.) can be prevented from entering the electric wire storage chamber 25, and the electric wires are inadvertently moved out of the electric wire storage chamber 25. It is possible to prevent 51 from jumping out. That is, the electric wire 51 accommodated in the electric wire accommodating chamber 25 is disposed so as to be locked to the hooking convex portion 251 as shown in FIG. Specifically, as shown in FIG. 7, the electric wires 51 in the electric wire storage chamber 25 are arranged so as to pass through the side opposite to the electric wire insertion hole 20 of the hooking convex portion 251.

Here, as the heat radiation fin 220, for example, a plate-shaped heat radiation fin can be used. However, the shape of the radiation fin 220 is not limited to a plate shape. The heat radiation fins 220 only need to have a structure that increases the surface area of the lighting fixture in order to improve the heat dissipation of the lighting fixture. In the present embodiment, the heat radiating portion 22 includes a plurality of plate-shaped heat radiating fins 220. The plate-like radiating fins 220 are arranged with the longitudinal direction of the plate along the thickness direction of the lamp 2.

Here, in the conventional example of the luminaire described in Document 1, the top plate corresponding to the electric wire cover 6 is provided in a range overlapping the substrate when viewed from the vertical direction of the substrate housing portion, and thus heat dissipation is hindered. It was.

On the other hand, as shown in FIG. 1A, the electric wire storage chamber 25 in the present embodiment is provided on the front side of FIG. 1B (lower side in FIG. 1A) than the substrate 11. The size and position are set so as not to overlap the substrate 11 when viewed from the up-down direction of the substrate housing portion 21 (the direction perpendicular to the paper surface in FIG. 1A). And the electric wire cover 6 which covers the electric wire storage chamber 25 from the upper side is also set to the dimension and position which do not overlap with the board | substrate 11 seeing from an up-down direction. That is, in the lighting fixture, the electric wire cover 6 and the electric wire insertion hole 20 are arranged at positions that do not overlap the light source region 13 in the thickness direction of the lamp 2.

The lighting fixture of the present embodiment described above has the following first to ninth features. The second to ninth features are arbitrary features.

In the first feature, the lighting fixture includes the lamp 2, the heat radiating portion 22, the electric wire insertion hole 20, and the electric wire cover 6. The lamp 2 has a first surface 2a and a second surface 2b located on the opposite sides in the thickness direction, and includes a light source region 13 for arranging the light source on the first surface 2a. The heat radiating part 22 is installed on the second surface 2 b of the lamp 2. The electric wire insertion hole 20 is configured to pass through the lamp 2 from the first surface 2a to the second surface 2b and pass an electric wire electrically connected to the light source. The wire cover 6 faces the second surface 2b so as to cover the wire insertion hole 20. The electric wire cover 6 and the electric wire insertion hole 20 are arranged at positions that do not overlap the light source region 13 in the thickness direction of the lamp 2.

In the second feature, the luminaire having the first feature includes the electric wire storage chamber 25 on the second surface 2b of the lamp 2. The electric wire storage chamber 25 is formed by a wall 253 protruding from the second surface 2b and surrounding the electric wire insertion hole 20, and the second surface 2b. The wire cover 6 is disposed on the wall 253 so as to cover the wire storage chamber 25. The electric wire storage chamber 25 is formed at a position that does not overlap the light source region 13 in the thickness direction of the lamp 2.

In the third feature, the lighting fixture having the first and second features includes a wire insertion notch 250 and a hooking convex portion 251. The electric wire insertion notch 250 is formed in the wall 253 and is configured to pass the electric wire 51. The hooking convex portion 251 is formed in the electric wire storage chamber 25 and faces the electric wire insertion notch 250 on the opposite side of the electric wire insertion notch 250. The hook protrusion 251 is disposed on the opposite side of the wire insertion notch 250 with respect to the wire insertion hole 20 in the wire storage chamber 25. And the hooking convex part 251 is arrange | positioned spaced apart from the wall 51 so that the space which lets the electric wire 51 pass between the walls 253 may be formed.

In the fourth feature, in the third feature, the heat dissipating part 22 is composed of a plurality of heat dissipating fins 220 protruding from the second surface 2b.

In the fifth feature, in the fourth feature, the heat radiation fin 220 on the opposite side of the light source region 13 with respect to the electric wire storage chamber 25 is more than the heat radiation fin 220 on the light source region 13 side with respect to the electric wire storage chamber 25. The height is small.

In the sixth feature, in the fourth or fifth feature, the radiating fin 220 closest to the wire insertion notch 250 among the plurality of radiating fins 220 is arranged to face the wire insertion notch 250.

In the seventh feature, in any one of the fourth to sixth features, the wall 253 is smaller in height than the heat radiation fin 220 closer to the light source region 13 than the wall 253.

In the eighth feature, in any one of the fourth to seventh features, the radiating fins 220 are plate-shaped.

In the ninth feature, in any one of the first to eighth features, the luminaire includes the light source in the light source region 13. The light source includes a light emitting element 10 and a substrate 11 on which the light emitting element 10 is mounted.

In other words, in other words, the luminaire includes a substrate 11 on which the light emitting diode 10 is mounted, and a substrate accommodating portion that is flat in the vertical direction and accommodates the substrate 11 on the lower side. 21 and a lamp 2 having a heat radiating portion 22 projecting from the upper surface of the substrate housing portion 21. The board accommodating portion 21 is provided with an electric wire insertion hole 20 through which the electric wire 51 electrically connected to the light emitting diode 10 is inserted in the vertical direction. The electric wire insertion hole 20 is coupled to the lamp 2 from above. The electric wire cover 6 is provided, and the electric wire cover 6 does not overlap the substrate 11 when viewed from the vertical direction of the substrate accommodating portion 21.

According to the above configuration, compared to the case where the wire cover 6 is provided in a range overlapping the substrate 11 when viewed from the thickness direction of the substrate accommodating portion 21 (vertical direction in FIG. 1B) as in the conventional example described in Document 1. And the fall of the heat dissipation by the electric wire cover 6 can be suppressed, and heat dissipation can be improved.

That is, according to the lighting fixture of this embodiment, compared with the case where the electric wire cover 6 overlaps a board | substrate (the said light source area | region) seeing from the up-down direction of the board | substrate accommodating part 21 like the prior art example, heat dissipation by the electric wire cover 6 is carried out. Since the decrease is suppressed, the heat dissipation of the lighting fixture is improved.

Claims

A lamp having a first surface and a second surface located on opposite sides in the thickness direction, and having a light source region for disposing a light source on the first surface;
A heat dissipating part installed on the second surface;
An electric wire insertion hole configured to pass through the electric wire electrically connected to the light source, penetrating the lamp from the first surface to the second surface;
An electric wire cover facing the second surface so as to cover the electric wire insertion hole;
With
The said electric wire cover and the said electric wire penetration hole are arrange | positioned in the position which does not overlap with the said light source area | region in the thickness direction of the said lamp.
The second surface includes an electric wire storage chamber for partially storing the electric wire,
The wire storage chamber is formed of a wall protruding from the second surface and surrounding the wire insertion hole and the second surface,
The wire cover is disposed on the wall so as to cover the wire storage chamber,
The lighting apparatus according to claim 1, wherein the electric wire storage chamber is formed at a position that does not overlap the light source region in a thickness direction of the lamp.
A hooking projection in the electric wire storage chamber,
A wire insertion notch on the wall;
With
The electric wire insertion notch is configured to pass the electric wire,
The hook protrusion is disposed on the opposite side of the wire insertion notch with respect to the wire insertion hole, and is spaced apart from the wall so as to form a space for passing the wire between the wall and the wall. The lighting fixture according to claim 2, wherein
The lighting device according to claim 3, wherein the heat dissipating part includes a plurality of heat dissipating fins protruding from the second surface.
Among the plurality of radiating fins, the radiating fin on the opposite side of the light source region with respect to the electric wire storage chamber is smaller in height than the radiating fin on the light source region side with respect to the electric wire storage chamber. The lighting fixture according to claim 4.
The lighting fixture according to claim 4 or 5, wherein a heat radiating fin closest to the electric wire insertion notch among the plurality of radiating fins is arranged to face the electric wire insertion notch.
The illumination according to any one of claims 4 to 6, wherein the wall is smaller in height than the heat radiation fin closer to the light source region than the wall among the plurality of heat radiation fins. Instruments.
The lighting fixture according to any one of claims 4 to 7, wherein the plurality of heat dissipating fins are plate-shaped.
Providing the light source in the light source region;
The lighting apparatus according to any one of claims 1 to 8, wherein the light source includes a light emitting element and a substrate on which the light emitting element is mounted.