TWI497011B - Lighting apparatus - Google Patents

Description

Lighting fixture

The present invention relates to lighting fixtures.

As shown in the document 1 (Japanese Patent Laid-Open Publication No. 2011-216313), there is provided a lighting fixture comprising: a substrate on which a light emitting diode is mounted; a heat sink (lamp) having a substrate housing And a heat dissipating fin, the substrate accommodating portion is formed in a vertically flat shape and has a substrate fixed to the lower side thereof, and the heat dissipating fin is extended from the upper side of the substrate accommodating portion.

In the lighting fixture described above, the electric wire connected to the light-emitting diode is pulled out from the upper side of the substrate housing portion by the electric wire insertion hole provided in the substrate housing portion.

Further, the lamp is provided with a wire cover that covers the wire insertion perforation from above to prevent foreign matter from entering the wire insertion hole.

However, when the distance between the substrate on which the light-emitting diode as the heat source is mounted and the wire cover is close to each other, the heat dissipation property due to the heat radiation being blocked by the wire cover is reduced. That is, in the lighting fixture, the wire cover may cause the heat dissipation of the lighting fixture to be lowered.

The present invention has been made in view of the above circumstances, and an object thereof is to improve heat dissipation of a lighting fixture having a wire cover.

A first aspect of the lighting fixture of the present invention includes a lamp, a heat dissipating portion, a wire insertion hole, and a wire cover. The lamp has a first surface and a second surface that are opposite to each other in the thickness direction, and has a light source region for arranging the light source on the first surface. The heat radiating portion is provided on the second surface of the lamp. The electric wire insertion hole is formed by penetrating the lamp from the first surface to the second surface, and is provided with an electric wire electrically connected to the light source. The wire cover faces the second surface to cover the wire insertion hole. The wire cover and the wire insertion hole are disposed at positions that do not overlap the light source region in the thickness direction of the lamp.

According to a second aspect of the present invention, in the first aspect of the invention, the second surface of the lamp has an electric wire storage chamber in which a part of the electric wires are housed. The electric wire housing chamber is formed by a wall extending from the second surface and pierced through the electric wire and the second surface. The wire cover is disposed on the wall to cover the wire storage chamber. The wire storage chamber is formed so as not to overlap the light source region in the thickness direction of the lamp.

According to a third aspect of the invention, in the second aspect, the lighting fixture has a hooking projection in the electric wire housing chamber, and further includes a wire insertion hole in the wall. The wire insertion hole is formed by penetrating the aforementioned wire. The hooking projection is disposed on the opposite side of the wire insertion hole with respect to the wire insertion hole, and is disposed apart from the wall to form a space between the wall and the wall.

According to a fourth aspect of the lighting apparatus of the present invention, in the third aspect, the heat dissipating portion is configured by a plurality of fins extending from the second surface.

According to a fifth aspect of the present invention, in the fourth aspect, the heat dissipating fin located on a side opposite to the light source region with respect to the electric wire housing chamber has a height smaller than a side of the light source region with respect to the electric wire housing chamber The aforementioned heat sink fins.

According to a sixth aspect of the present invention, in the fourth aspect or the fifth aspect, the heat radiating fins of the plurality of heat radiating fins that are closest to the wire insertion hole are disposed to face the wire insertion gap.

According to a seventh aspect of the present invention, in the fourth aspect of the present invention, in the fourth aspect, the wall has a height smaller than a heat dissipation fin that is closer to the light source region than the wall.

According to an eighth aspect of the present invention, in the fourth aspect of the invention, the heat sink fin is in a plate shape.

According to a ninth aspect of the present invention, in the ninth aspect, 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.

2‧‧‧Lights

2a‧‧‧1st

2b‧‧‧2nd

4‧‧‧ Appliance body

5‧‧‧Power supply unit

6‧‧‧Wire cover

10‧‧‧Light Emitting Diodes (Light Emitting Elements)

11‧‧‧Substrate

12‧‧‧ plate spring

13‧‧‧Light source area

20‧‧‧Wire insertion piercing

21‧‧‧Substrate housing department

22‧‧‧ Department of heat dissipation

23‧‧‧ Surrounding

24‧‧‧Installation

25‧‧‧Wire storage room

31‧‧‧reflector

32‧‧‧Transparent cover

40‧‧‧ inserted perforation

41‧‧‧ Body Department

42‧‧‧锷

43‧‧‧Clamping Department

51‧‧‧Wire

220, 220a, 220b, 220c, 231‧‧ ‧ heat sink fins

250‧‧‧Wire insertion through the gap

251‧‧‧ hooking the convex part

252‧‧‧ platform

253‧‧‧ wall

H‧‧‧ Height

Fig. 1 shows a lighting fixture according to an embodiment of the present invention, wherein (a) is a plan view and (b) is a cross-sectional view taken along line A-A of (a).

Fig. 2 is a cross-sectional view showing a lighting fixture of an embodiment.

Fig. 3 is a perspective view showing a lighting fixture of an embodiment.

Fig. 4 is a view showing a lighting fixture of an embodiment, (a) is a plan view, and (b) is a front view.

Fig. 5 is an exploded perspective view showing a lighting fixture of an embodiment.

Fig. 6 is an exploded perspective view showing a lighting fixture of an embodiment.

Fig. 7 is a plan enlarged view showing a wire housing chamber having the above lighting fixture.

[Preferred form of implementing the invention]

Hereinafter, a lighting fixture according to an embodiment of the present invention will be described with reference to Figs. 1 to 7 . Following The vertical direction and the horizontal direction of FIG. 1(b) will be described as a reference in the vertical direction and the horizontal direction of the lighting fixture. That is, the left-right direction of the lighting fixture is set to coincide with the left-right direction in FIG. 1(b). Further, the vertical direction of the lighting fixture will be described in conformity with the vertical direction in FIG. 1(b). Further, the vertical direction (the direction orthogonal to the plane of the drawing of FIG. 1(b)) in FIG. 1(a) is referred to as the front-rear direction in FIG. 1(b), and is defined to coincide with the front-rear direction of the lighting fixture. . Here, the front side of the drawing in FIG. 1(b) is the front side of the lighting fixture, and the front side of the drawing in FIG. 1(b) is the rear side of the lighting fixture.

The lighting fixture of the present embodiment includes a substrate 11 on which a light-emitting diode (light-emitting element) 10 is mounted, and a lamp 2 to which the substrate 11 is fixed. That is, the lighting fixture of the embodiment has the lamp 2. The lamp 2 has a first surface 2a and a second surface 2b which are located on the opposite side in the thickness direction (the vertical direction of the drawing of Fig. 1(a); the vertical direction of Fig. 1(b)). In the present embodiment, the first surface 2a and the second surface 2b are orthogonal to the thickness direction of the lamp 2. The luminaire 2 has a light source region 13 for arranging a light source on the first surface 2a. In Fig. 1(a), the light source region 13 provided on the first surface 2a is shown as a region surrounded by a broken line. Further, in the present embodiment, the lighting fixture has the light source in the light source region 13. The foregoing light source includes: a light-emitting element 10; and a substrate 11 on which the light-emitting element 10 is mounted.

In FIG. 1(b), the lamp 2 includes a substrate housing portion 21 having a flat shape in which the thickness direction is directed in the vertical direction, and a heat dissipation portion 22 (a plurality of heat dissipation fins 220) extending from the substrate housing portion 21. The top surface (the second surface of the lamp 2) 2b. That is, the lighting fixture has the heat radiating portion 22 on the second surface 2b of the lamp 2. The heat radiating portion 22 is configured by a plurality of heat radiating fins 220 extending from the second surface 2b. As the material of the lamp 2, a material having a high thermal conductivity is desired, and a metal such as aluminum can be used.

In FIG. 1(b), the substrate 11 is fixed to the central portion of the bottom surface (the 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, when the description is made using FIG. 5 (the exploded perspective view of the lighting fixture viewed from the first surface 2a side of the lamp 2), the substrate 11 is screwed and fixed to the substrate housing portion 21 of the lamp 2, respectively. The leaf spring 12 is pressed to the bottom surface of the substrate housing portion 21.

Further, as shown in FIG. 3, the light-emitting diode 10 is electrically connected to the generation via the electric wire 51. A power supply device 5 for illuminating the appropriate DC power of the LEDs 10. 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 via 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), the substrate housing portion 21 is provided with a wire insertion hole 20 through which the electric wire 51 is inserted. In FIG. 3, the electric wire 51 is pulled out from above the lamp 2 shown in FIG. 3 through a wire insertion hole 20 and connected to the power supply device 5. That is, the lighting fixture has a wire insertion perforation 20. The electric wire insertion hole 20 passes through the lamp 2 from the first surface 2a to the second surface 2b. That is, the wire insertion perforation 20 penetrates the lamp 2 in the thickness direction. Further, the electric wire insertion hole 20 is configured to penetrate the electric wire 51.

The lighting fixture has a wire cover 6 facing the second surface 2b to cover the wire insertion hole 20. In FIG. 1(a), for the sake of explanation, a lighting fixture in a state in which the wire cover 6 is removed is illustrated, and a region in which the wire cover 6 is provided is displayed in a region surrounded by a 2-point chain line. The wire cover 6 and the wire insertion hole 20 are disposed at positions that do not overlap the light source region 13.

Further, as shown in FIG. 1(b), the bottom surface of the substrate housing portion 21 (the first surface 2a of the lamp 2) projects downwardly from the cylindrical surrounding portion 23 surrounding the substrate 11, and the periphery of the surrounding portion 23 The surface also protrudes from the fins 231. That is, in the present embodiment, the lighting fixture has the heat radiating portion 22 not only on the second surface 2b of the lamp 2 but also the heat radiating portion 22 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 surrounding portion 23. The vertical direction of Fig. 2 coincides with the vertical direction of Fig. 1(b). The reflection plate 31 surrounds the cylindrical shape of the light-emitting diode 10 as viewed from below, and the cross-sectional shape of the cross section orthogonal to the vertical direction is gradually increased toward the lower side. That is, the reflecting plate 31 is configured to have a cross-sectional shape orthogonal to the thickness direction of the lamp 2 (the vertical direction in FIG. 1(b) and FIG. 2), and is gentle toward the direction away from the lamp 21 (lower in FIG. 2). Become bigger. 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 translucent cover 32 made of a light transmissive material (for example, glass). The reflector 31 and the translucent cover 32 are respectively fixed to the lamp 2 by screwing, for example.

Further, as shown in FIG. 2, the lamp 2 is fixed to the fixture body 4. The fixture body 4 is a housing of the lighting fixture. The luminaire main body 4 has a cylindrical body portion 41 that is opened up and down as a whole. The main body portion 41 is held in such a manner that the distal end portion of the lamp 2 projects upward and the translucent cover 32 is exposed downward.

Here, the lighting fixture of this embodiment will be described using FIG. The horizontal direction, the vertical direction, and the vertical direction of the drawing in Fig. 4(a) are shown to coincide with the horizontal direction, the vertical direction, and the vertical direction of the drawing in Fig. 1(a). Further, the left-right direction, the vertical direction, and the vertical direction of the drawing of FIG. 4(b) are respectively shown in the horizontal direction, the vertical direction, and the vertical direction of the drawing in FIG. 1(b). The heat radiating portion 22 is defined so as not to have a predetermined circular shape in which the substrate housing portion 21 is enclosed from the thickness direction of the lamp 2 (the vertical direction in the drawing of FIG. 4( a ); the vertical direction in FIG. 4( b )). Outstretched size shape. That is, the heat radiating portion 22 (the heat radiating fins 220) protrudes from the second surface 2b, but does not protrude from the outer edge of the lamp 2 in plan view of the lamp 2 as viewed from the thickness direction. In the present embodiment, the heat radiating portion 22 (heat radiating fins 220) protrudes from the second surface 2b along the normal direction of the second surface 2b. That is, the heat radiating portion 22 (heat radiating fins 220) protrudes from the second surface 2b along the thickness direction of the lamp 2. Mounting pieces 24 are provided at both end portions of the lamp 2 in the horizontal direction (the horizontal direction in Fig. 1(a)), and the mounting pieces 24 are oriented in the thickness direction toward the upper and lower sides in Figs. 1(b) and 4(b). The direction extends from the above-mentioned circular shape. The top surface of the main body portion 41 of the luminaire main body 4 is provided with a circular insertion hole 40 which is slightly larger than the above-described circular shape, and the lamp 2 is fixed to the luminaire main body 4 by screwing the attachment piece 24 to the peripheral edge portion of the insertion perforation 40. That is, the heat radiating portion 22 that protrudes upward from the mounting piece 24 in the lamp 2 protrudes from above the instrument body 4.

Further, as shown in FIG. 4(b), in the luminaire main body 4, the bottom end of the outer peripheral surface of the main body portion 41 is provided with a dam portion 42 so as to extend outward. Further, in the luminaire main body 4, a plurality of (three in the figure) outer peripheral surfaces of the main body portion 41 are elastically displaced with respect to the main body portion 41 at equal intervals in the circumferential direction (for example, approximately 120 degrees apart). The holding portion 43 is made smaller in size from the main body portion 41. The luminaire main body 4 is, for example, placed in an embedding hole (not shown) provided in a ceiling on which a luminaire is attached, and the nip portion 43 abuts against the top surface of the ceiling material at a peripheral portion of the burying hole to prevent downward movement. Fall off. Moreover, the gap between the outer peripheral surface of the main body portion 41 and the inner peripheral surface of the embedding hole is covered by the crotch portion 42 as viewed from the lower side of the ceiling.

Hereinafter, the electric wire storage chamber 25 will be described with reference to FIGS. 1 , 6 , and 7 , and the lamp 2 is provided on the upper side of the substrate housing portion 21 (the second surface 2 b of the lamp 2 ) and houses a part of the electric wire 51 . Fig. 6 is an exploded perspective view of the lighting fixture viewed from the second surface 2b of the lamp 2. FIG. 7 is an enlarged plan view of the electric wire housing chamber 25. The lighting fixture has a wire housing chamber 25 on the second surface 2b of the lamp 2. The wire storage chamber 25 houses a part of the electric wire 51.

The wire accommodating chamber 25 is formed to be surrounded by the heat dissipation fins 220 (wall 253) and covered by the wire cover 6, and the heat dissipation fins protrude upward from the substrate accommodating portion 21, which is smaller than the wire accommodating chamber 25. The protruding size of the heat dissipation fins 220a near the light source region 13. That is, the electric wire storage chamber 25 is formed by the second surface 2b and the wall 253. In other words, the wire housing chamber 25 is defined by the wall 253 and the second surface 2b. The wall 253 is inserted into the perforation 20 around the wire and protrudes from the second face 2b. That is, the electric wire insertion hole 20 is provided in the electric wire housing chamber 25. In other words, the electric wire insertion hole 20 is connected to the electric wire housing chamber 25. The wire cover 6 is disposed on the wall 253 to cover the wire housing chamber 25. In other words, the other end of the wall 253 opposite to the end to which the second surface 2b is connected is formed with an opening facing the electric wire insertion hole 20, and the electric wire cover 6 is disposed on the wall 253 to cover the opening. The wire housing 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 housing chamber 25 has a rectangular shape in plan view as viewed in the thickness direction of the lamp 2, and has a rectangular shape which is long in the left and right as shown in Fig. 1(a). The surface of the heat dissipation fin 220 in the extending direction has a structure having an opening.

Further, in the present embodiment, the wall 253 has a height H smaller than the heat radiation fins 220a located on the light source region 13 side with respect to the electric wire housing chamber 25. In other words, the wall 253 is lower than the heat dissipation fins 220a. As shown in FIG. 1(b), the height H is a member (a wall 253, a heat radiation fin 220, and a hooking convex portion 251 to be described later) extending from the second surface 2b, from the second surface 2b. The distance up to the end on the opposite side to the second surface 2b. In other words, the height H refers to the height from which the member projecting from the second face 2b protrudes.

Further, in the present embodiment, the wall 253 is formed by the heat radiation fins 220. The electric wire insertion hole 20 has an opening at an end portion located inside the electric wire housing chamber 25 near the center.

Further, in the electric wire accommodating chamber 25, the heat radiating fins 220 on the front side in FIG. 1(b) also have a small protruding size from the substrate accommodating portion 21 upward. In other words, the heat dissipation fins 220b located on the opposite side of the light source region 13 with respect to the electric wire housing chamber 25 have a smaller height H than the heat dissipation fins 220a on the light source region 13 side with respect to the electric wire housing chamber 25. In other words, the heat dissipation fins 220b are lower than the heat dissipation fins 220a.

Further, as described above, the protruding size of the heat radiating fins 220 upward from the substrate housing portion 21 is made smaller than the other portions of the circumference and the front side of the wire housing chamber 25 (that is, the opposite side to the substrate 11), thereby When the electric wire 51 is pulled back, the heat radiating fins 220 are less likely to be hindered, and workability is ensured.

Further, the lamp 2 is attached to the electric wire cover 6 by screwing, for example, and covers the rectangular flat plate of the electric wire storage chamber 25 as viewed from above. In the present embodiment, the heat radiating fins 220 having a small protruding size from the substrate accommodating portion 21 are formed so as to surround the electric wire housing chamber 25 with the above-described platform 252 having a smaller protruding size, and the electric wire cover 6 is attached. The platform 252 is placed to cover the opening of the wire housing chamber 25. Further, in the heat radiating portion 22, a portion of the wall 253 (the left side in FIG. 1) constituting the electric wire housing chamber 25 is provided with a wire insertion portion at a portion of the bottom surface of the electric wire cover 6 (the surface facing the second surface 2b). The notch 250 is worn as a gap that is inserted through the electric wire 51. That is, the lighting fixture of the present embodiment has the electric wire insertion hole 250 in the wall 253. The electric wire insertion hole 250 is configured to penetrate the electric wire 51. In the present embodiment, the electric wire insertion hole 250 is formed in a portion of the wall 253 that is connected to the electric wire cover 6. Further, in the electric wire accommodating chamber 25, closer to the right side in FIGS. 1 and 7 than the electric wire insertion through hole 20 (that is, the opposite side of the electric wire insertion through hole 20 for the electric wire inserted through the notch 250), as shown in FIG. The hooking convex portion 251 of the electric wire 51 is hooked. That is, the lighting fixture of the present embodiment has the hooking convex portion 251 in the electric wire housing chamber 25. The hooking convex portion 251 is disposed on the opposite side of the wire insertion hole 250 with respect to the wire insertion hole 20 . That is, the electric wire insertion hole 250, the electric wire insertion hole 20, and the hooking convex portion 251 are arranged in the left-right direction of FIGS. 1(a) and 1(b) in accordance with the sequence. The wire insertion through-hole 250 is configured to leave the wall 253 to form a space for penetrating the wire 51 between it and the wall 253. In other words, the electric wire insertion hole 250 is disposed so as to be formed with a space of a size larger than the thickness of the electric wire 51 with the wall 253. The electric wires 51 are disposed such that the one end portion penetrates the electric wire insertion through hole 20, and the other end portion penetrates the electric wire insertion hole 250. Both ends of the wire 51 The portion between them is housed in the wire storage chamber 25.

In the present embodiment, the hooking convex portion 251 is extended from the second surface 2b. Further, the convex portion 251 is hooked, and the height H is smaller than the wall 253. That is, the hooking projection 251 is lower than the wall 253. Thereby, in the lighting fixture having the hooking convex portion 251, the electric wire housing chamber 25 can be covered by using the electric wire cover 6 having a planar surface facing the second surface 2b.

Here, the outer side of the electric wire insertion hole 250 (the left side of FIG. 7), the heat dissipating fin 220c closest to the electric wire insertion hole 250 is disposed so as to insert the thickness direction toward the opening direction of the electric wire through the notch 250 (left and right in FIG. 7). direction). That is, among the plurality of heat radiating fins 220, the heat radiating fins 220c closest to the electric wire insertion notch 250 on the outer side of the electric wire housing chamber 25 are disposed to face the electric wire insertion hole 250. Then, the electric wire 51 pulled out from the electric wire insertion hole 250 is pulled out along the front side (lower side in FIG. 7) in FIG. 1(b) along the heat dissipation fin 220c. That is, the electric wire 51 is bent at the outer side of the electric wire accommodating chamber 25 (at least after the electric wire is inserted through the notch 250), as compared with, for example, a wire inserted through the notch 250 (front in FIG. 1(b); In the case where there is an opening for the lower portion, a large frictional force is generated between the electric wire 51 and the inner surface of the electric wire inserted through the notch 250, and the electric wire 51 is tension-fixed by the frictional force. Further, the electric wire accommodating chamber 25 is sealed by the electric wire cover 6, thereby preventing foreign matter (dust, insects, etc.) from entering the electric wire accommodating chamber 25, and also preventing the electric wire 51 from being accidentally ejected outside the electric wire accommodating chamber 25. That is, the electric wires 51 accommodated in the electric wire storage chamber 25 are arranged to be locked to the hooking convex portions 251 as shown in Fig. 7 . Specifically, the electric wires 51 in the electric wire accommodating chamber 25 are disposed on the opposite side of the electric wire insertion through hole 20 of the hooking convex portion 251 as shown in FIG. 7 .

Here, for example, a plate-shaped heat dissipation fin may be used as the heat dissipation fin 220. However, the shape of the heat dissipation fins 220 is not limited to a plate shape. The heat radiating fins 220 may have a structure in which the surface area of the lighting fixture is increased in order to improve the heat dissipation of the lighting fixture. In the present embodiment, the heat radiating portion 22 is configured by a plurality of plate-shaped heat radiating fins 220. The plate-shaped heat radiating fins 220 are arranged along the thickness direction of the lamp 2 in the longitudinal direction of the plate.

In the conventional example of the lighting fixture described in the document 1, the ceiling corresponding to the electric wire cover 6 is disposed so as to overlap the substrate when viewed from the vertical direction of the substrate housing portion. Blocks heat dissipation.

On the other hand, the electric wire storage chamber 25 in the present embodiment is provided closer to the front side (the lower side in FIG. 1(a)) of FIG. 1(b) than the substrate 11 as shown in FIG. 1(a), and is set. The size and position which are not overlapped with the substrate 11 when viewed from the vertical direction of the substrate housing portion 21 (the direction perpendicular to the plane in FIG. 1(a)). Further, the wire cover 6 that covers the wire housing chamber 25 from above is also set to a size and position that does not overlap the substrate 11 as viewed in the vertical direction. That is, in the lighting fixture, the wire cover 6 and the wire insertion hole 20 are disposed 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 includes the following first to ninth features. Further, 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 which are located on the opposite side in the thickness direction, and has a light source region 13 for arranging the light source on the first surface 2a. The heat radiating portion 22 is provided on the second surface 2b of the lamp 2. The electric wire insertion hole 20 is configured to pass through the lamp 2 to the second surface 2b from the first surface 2a, and penetrates an electric wire electrically connected to the light source. The wire cover 6 faces the second surface 2b to cover the wire insertion hole 20. The wire cover 6 and the wire insertion hole 20 are disposed at positions that do not overlap the light source region 13 in the thickness direction of the lamp 2 .

In the second feature, the lighting fixture having the first feature has the electric wire housing chamber 25 on the second surface 2b of the lamp 2. The electric wire storage chamber 25 is formed by a wall 253 that protrudes from the second surface 2b and surrounds the electric wire insertion hole 20, and a second surface 2b. The wire cover 6 is disposed on the wall 253 to cover the wire housing chamber 25. The wire housing 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: an electric wire insertion through-hole 250; and a hooking convex portion 251. The electric wire insertion hole 250 is formed to be formed in the wall 253 and penetrates the electric wire 51. The hooking convex portion 251 is formed in the electric wire housing chamber 25, and the electric wire is inserted through the notch 250 on the opposite side of the electric wire insertion through the notch 250. The hooking convex portion 251 is relatively opposed in the wire housing chamber 25 The electric wire is inserted into the through hole 20 and disposed on the opposite side of the electric wire insertion through the notch 250. Also, the hooking projection 251 is disposed away from the wall 253 to form a space for penetrating the electric wire 51 between it and the wall 253.

In the fourth feature, in the third feature, the heat radiating portion 22 is configured by a plurality of heat radiating fins 220 extending from the second surface 2b.

In the fifth feature, the heat dissipating fins 220 on the opposite side of the light source region 13 with respect to the electric wire housing chamber 25 are higher in heat dissipation fin than on the side of the light source region 13 with respect to the electric wire housing chamber 25 220 is smaller.

In the sixth feature, in the fourth or fifth feature, the heat dissipation fins 220 of the plurality of heat dissipation fins 220 that are closest to the wire insertion hole 250 are disposed to face the wire insertion gap 250.

In the seventh feature, in any one of the fourth to sixth aspects, the wall 253 is made to have a height smaller than the heat radiating fin 220 closer to the light source region 13 than the wall 253.

In the eighth aspect, in any one of the fourth to seventh aspects, the heat dissipation fins 220 are formed in a plate shape.

In the ninth feature, in any one of the first to eighth aspects, the lighting fixture has the light source in the light source region 13. The aforementioned light source includes: a light-emitting element 10; and a substrate 11 on which the light-emitting element 10 is mounted.

In addition, the first and ninth features, that is, the lighting fixture, includes a substrate 11 on which the light-emitting diode 10 is mounted, and a lamp 2 having a substrate housing portion 21 and a heat dissipation portion 22, which is a flat shape in the vertical direction. The substrate 11 is housed on the lower side, and the heat dissipation portion 22 is extended from the top surface of the substrate housing portion 21. The substrate housing portion 21 is provided with an electric wire insertion hole 20 penetrating in the vertical direction to be inserted through the electric wire 51 electrically connected to the light emitting diode 10, and has a wire cover that is coupled to the lamp 2 and covers the electric wire insertion hole 20 from above. 6. The wire cover 6 does not overlap the substrate 11 as viewed in the vertical direction of the substrate housing portion 21.

According to the above-described configuration, the wire cover 6 is provided in a range overlapping the substrate 11 when viewed from the thickness direction of the substrate housing portion 21 (the vertical direction in FIG. 1(b)) as compared with the conventional example described in the document 1. In addition, it is possible to suppress a decrease in heat dissipation property due to the wire cover 6, and it is possible to improve heat dissipation.

In other words, in the case of the lighting fixture according to the present embodiment, the electric wire cover 6 of the conventional example is overlapped with the substrate (the light source region) as viewed from the vertical direction of the substrate housing portion 21, since the electric wire is suppressed. The heat dissipation due to the cover 6 is lowered, so that the heat dissipation of the lighting fixture is improved.

2‧‧‧Lights

2a‧‧‧1st

2b‧‧‧2nd

6‧‧‧Wire cover

10‧‧‧Light Emitting Diodes (Light Emitting Elements)

11‧‧‧Substrate

13‧‧‧Light source area

20‧‧‧Wire insertion piercing

21‧‧‧Substrate housing department

22‧‧‧ Department of heat dissipation

23‧‧‧ Surrounding

24‧‧‧Installation

25‧‧‧Wire storage room

220, 220a, 220b, 220c, 231‧‧ ‧ heat sink fins

250‧‧‧Wire insertion through the gap

251‧‧‧ hooking the convex part

252‧‧‧ platform

253‧‧‧ wall

H‧‧‧ Height

Claims (9)

A lighting fixture comprising: a lamp having a first surface and a second surface on opposite sides in a thickness direction; wherein the first surface has a light source region for arranging a light source; and the heat dissipation portion is disposed on the second surface; The insertion hole is formed to penetrate the lamp from the first surface to the second surface, and has an electric wire electrically connected to the light source; and a wire cover facing the second surface to cover the wire insertion hole; And the wire cover and the wire insertion hole are disposed at positions that do not overlap the light source region in the thickness direction of the lamp. The lighting fixture of claim 1, wherein the second surface has a wire storage chamber that houses a part of the electric wire, and the wire storage chamber is a wall that protrudes from the second surface and is perforated around the electric wire. Formed on the second surface, the electric wire cover is disposed on the wall and covers the electric wire storage chamber, and 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. The lighting fixture of claim 2, comprising: a hooking protrusion located in the wire receiving compartment; and a wire inserted through the notch, located in the wall; and the wire is inserted through the notch for the wire to penetrate, the hooking The convex portion is disposed on the opposite side of the electric wire insertion hole with respect to the electric wire insertion hole, and is disposed away from the wall to form a space between the wall and the wall for the electric wire to penetrate. The lighting fixture of claim 3, wherein the heat dissipating portion is formed by a plurality of fins extending from the second surface. For example, in the lighting fixture of claim 4, among the majority of the heat dissipation fins, The heat radiating fin located on the opposite side of the light source region with respect to the wire housing chamber has a height smaller than a heat radiating fin located on the light source region side with respect to the wire housing chamber. The luminaire of claim 4 or 5, wherein among the plurality of heat dissipation fins, the heat dissipation fin closest to the wire insertion hole is disposed to face the wire insertion hole. The lighting fixture of claim 4, wherein the height of the wall is smaller than the heat sink fins of the plurality of heat sink fins that are closer to the light source region than the wall. The lighting fixture of claim 4 or 5, wherein the plurality of fins are plate-shaped. A lighting fixture according to any one of claims 1 to 5, wherein the light source region has the light source, the light source comprising: a light emitting element; and a substrate on which the light emitting element is mounted.