JP7306904B2 - lighting equipment - Google Patents

Description

The present invention relates to lighting fixtures.

A downlight-type lighting fixture is disclosed in Patent Document 1. The lighting fixture of Patent Literature 1 includes a light source unit and a radiator. The light source unit is rotatable and tiltable. The radiator has a plurality of radiator fins. The plurality of heat radiation fins protrude above the light source unit.

JP 2013-196979 A

However, in order to improve the heat dissipation performance of the radiator in the lighting fixture of Patent Document 1, it is necessary to extend the heat dissipation fins further upward. If the heat radiating fins are extended upward, for example, they may interfere with a structure (for example, a heat insulating material) provided in the ceiling space.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a lighting fixture capable of improving the heat dissipation performance of a radiator without extending the heat dissipation fins upward.

A lighting fixture disclosed in the present application includes a lamp main body and a support section. The lamp main body emits light. The support portion tiltably supports the lamp main body. The lamp main body has a light source and a radiator. The light source emits light. The radiator has a plurality of radiating fins for radiating heat. At least one of the plurality of radiating fins has an extension portion extending to the light emitting side, which is the side from which the lamp main body emits light. The end of the extension portion on the light exit side is positioned on the light exit side with respect to the light source. The radiator further has a case part in which the light source is arranged. At least one of the plurality of radiating fins has a first overhanging portion that overhangs the outside of the case portion. The light emitting side end of the first protruding portion is located on the side opposite to the light emitting side with respect to the light source. The first protruding portion is positioned on the side on which the lamp main body tilts.

In the lighting fixture disclosed in the present application , at least one of the plurality of heat radiating fins may further have a second projecting portion projecting to the outside of the case portion. The second projecting portion may have the extension portion.

In the lighting fixture disclosed in the present application, the support portion may rotatably support the lamp main body around an optical axis of light emitted from the lamp main body.

The lighting fixture disclosed in the present application may further include a mounting member for mounting the lamp main body to the mounting position. The first projecting portion may face the mounting member.

In the lighting fixture disclosed in the present application, the first protruding portion may form a gap with the mounting member when the lamp body is mounted at the mounting position.

ADVANTAGE OF THE INVENTION According to this invention, the heat dissipation of a radiator can be improved, without extending a heat radiating fin upward.

It is a perspective view showing a lighting fixture concerning an embodiment of the present invention. It is a perspective view showing a lighting fixture concerning an embodiment of the present invention. It is a bottom view which shows the lighting fixture which concerns on embodiment of this invention. 4 is a cross-sectional view of the luminaire along line IV-IV of FIG. 3; FIG. 4 is a cross-sectional view of the luminaire along line VV of FIG. 3; FIG. It is a left view which shows the lighting fixture which concerns on embodiment of this invention. It is a front view showing a lighting fixture concerning an embodiment of the present invention. FIG. 8 is a cross-sectional view of the luminaire along line VIII-VIII of FIG. 7;

Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments. It should be noted that descriptions of overlapping descriptions may be omitted as appropriate. Also, in the drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

First, the lighting fixture 100 of this embodiment is demonstrated with reference to FIG. FIG. 1 is a perspective view showing a lighting fixture 100 according to this embodiment. The lighting fixture 100 of this embodiment is attached to the ceiling C (FIG. 8). More specifically, the lighting fixture 100 of this embodiment is embedded in the ceiling C (FIG. 8).

As shown in FIG. 1 , the lighting fixture 100 includes a lamp body 1 , a support portion 2 and a mounting member 3 . The lamp main body 1 has a radiator 6 . The support portion 2 has a fixed frame 4 and a rotating frame 5 . The rotating frame 5 has a light leakage restricting portion 51 .

In the following description, for convenience of explanation, the side of the rotary frame 5 on which the light leakage restricting portion 51 is provided is defined as the "front side", and the side opposite to the front side is defined as the "rear side". A lighting fixture 100 of an embodiment will be described. The lighting fixture 100 of the present embodiment will be described by defining the right side as viewed from the rear side of the lighting fixture 100 as the "right side" and the left side as viewed from the rear side of the lighting fixture 100 as the "left side". Further, the lighting fixture 100 of the present embodiment will be described with the side on which the support portion 2 is arranged with respect to the lamp main body 1 defined as "lower side" and the side opposite to the lower side defined as "upper side". Here, "upper" and "lower" correspond to "upper" and "lower" when the lighting device 100 is attached to the ceiling C (Fig. 8). In addition, FIG. 1 shows the lighting device 100 as seen from above obliquely forward left.

The lamp main body 1 emits light L. As shown in FIG. The support portion 2 supports the lamp main body 1 . The support portion 2 of this embodiment supports the lamp main body 1 rotatably and tiltably. More specifically, the fixed frame 4 rotatably supports the rotary frame 5, and the rotary frame 5 supports the lamp main body 1 so as to be tiltable.

Specifically, the fixed frame 4 and the rotary frame 5 are ring-shaped or substantially ring-shaped, and the fixed frame 4 supports the rotary frame 5 so as to be rotatable in the circumferential direction of the fixed frame 4 and the rotary frame 5 . Here, the substantially annular shape of the fixed frame 4 means that the fixed frame 4 is partly cut off in the circumferential direction. Similarly, the substantially annular shape of the rotating frame 5 indicates that the rotating frame 5 is partially cut off in the circumferential direction.

The light leakage restricting portion 51 of the rotating frame 5 is a portion of the rotating frame 5 whose vertical width (dimension) is larger than other portions (portions other than the light leakage restricting portion 51).

The light leakage restricting portion 51 restricts the light L from leaking from between the lamp main body 1 and the rotating frame 5 when the lamp main body 1 tilts rearward. Specifically, the light leakage restricting portion 51 prevents a gap from being generated between the lamp main body 1 and the rotating frame 5 when the lamp main body 1 tilts rearward. Alternatively, the light leakage restricting portion 51 further reduces the gap generated between the lamp main body 1 and the rotating frame 5 when the lamp main body 1 tilts rearward. According to this embodiment, since the rotating frame 5 has the light leakage restricting portion 51, the light L is less likely to leak to the ceiling space when the lamp main body 1 is tilted rearward. Therefore, even if the lamp main body 1 is tilted rearward, the light efficiency of the lighting fixture 100 is less likely to decrease. In order to suppress a decrease in the light efficiency of the lighting device 100, it is preferable that the inner surface of the light leakage restricting portion 51 (the surface on the side of the lighting device main body 1) is painted white. Alternatively, the inner surface of the light leakage restricting portion 51 is preferably a mirror surface.

The light leakage restricting portion 51 further restricts the tilting direction of the lamp main body 1 . In this embodiment, the light leakage restricting portion 51 restricts the lamp main body 1 from tilting forward. Specifically, when the lamp main body 1 is to be tilted forward, the lamp main body 1 comes into contact with the light leakage restricting portion 51 and the forward tilting of the lamp main body 1 is restricted. Therefore, the lamp main body 1 tilts rearward.

Since the lamp main body 1 and the rotary frame 5 are rotatable, the front-rear direction and the left-right direction change according to the rotational positions of the lamp main body 1 and the rotary frame 5 .

The mounting member 3 mounts the lamp main body 1 to the mounting position. Specifically, the attachment member 3 is fixed to the support portion 2 and attaches the support portion 2 to the attachment position. By attaching the support portion 2 to the attachment position, the lamp main body 1 can be attached to the attachment position. In this embodiment, the mounting position is the ceiling C (FIG. 8).

Specifically, the mounting member 3 is an elongated plate-like member, and its base end portion is fixed to the fixed frame 4 with a screw B1. The mounting member 3 protrudes radially from the fixed frame 4 when the lighting device 100 is not mounted on the ceiling C (FIG. 8). The mounting member 3 is bendable in a direction in which the tip thereof approaches the lamp main body 1 . The mounting member 3 is bent to generate a biasing force when the lighting device 100 is mounted on the ceiling C (FIG. 8). This biasing force attaches the lighting fixture 100 to the ceiling C (FIG. 8). The mounting member 3 is, for example, a leaf spring.

The lighting fixture 100 of this embodiment includes two mounting members 3 . In this embodiment, the two mounting members 3 are arranged at regular intervals. By arranging the two mounting members 3 at equal intervals, the lighting fixture 100 can be mounted on the ceiling C (FIG. 8) in a stable posture. The number of mounting members 3 is not particularly limited as long as it is plural. Further, the positions where the mounting members 3 are arranged are not particularly limited, and the intervals between the plurality of mounting members 3 may not be equal.

The radiator 6 radiates heat from the lamp main body 1 . The radiator 6 contains a material with high thermal conductivity. For example, the radiator 6 is made of metal. Specifically, the radiator 6 may be made of aluminum or an aluminum alloy.

The radiator 6 has a plurality of radiator fins 61 . Each of the heat radiation fins 61 radiates heat. The plurality of heat radiation fins 61 are arranged in the horizontal direction. Moreover, each of the plurality of radiation fins 61 is plate-shaped. Each radiation fin 61 is arranged along the front-rear direction. Since the heat radiator 6 has a plurality of heat radiating fins 61, the specific surface area of the heat radiator 6 is increased, and the heat dissipation performance of the heat radiator 6 is improved.

In this embodiment, the plurality of heat dissipation fins 61 includes a plurality of front heat dissipation fins 61a, a plurality of rear heat dissipation fins 61b, a first outer heat dissipation fin 61c, and a second outer heat dissipation fin 61d.

The plurality of front heat radiation fins 61a are arranged in front of the plurality of rear heat radiation fins 61b. The plurality of front radiation fins 61a and the plurality of rear radiation fins 61b are arranged between the first outer radiation fins 61c and the second outer radiation fins 61d in the horizontal direction. The first outer radiation fin 61c is arranged on the left side of the plurality of front radiation fins 61a and the plurality of rear radiation fins 61b. The second outer radiation fins 61d are arranged on the right side of the plurality of front radiation fins 61a and the plurality of rear radiation fins 61b.

Next, the lighting fixture 100 of this embodiment will be described with reference to FIG. FIG. 2 is a perspective view showing the lighting fixture 100 according to this embodiment. Specifically, FIG. 2 shows the luminaire 100 seen from above and obliquely behind the left.

As shown in FIG. 2 , the radiator 6 has a case portion 62 . In this embodiment, the case portion 62 is cylindrical. Specifically, the case portion 62 is open on the light emitting side from which the light L is emitted. Further, the case part 62 has a ceiling part 621 on the side opposite to the light emitting side.

Each of the front heat radiation fins 61 a has a base portion 611 . The base portion 611 is connected to the ceiling portion 621 of the case portion 62 and extends to the side opposite to the light emission side.

Each of the plurality of rear radiation fins 61b has a base portion 611 and a rear projecting portion 612. As shown in FIG. The rear projecting portion 612 is an example of a first projecting portion. The base portion 611 of the rear heat radiation fin 61b is connected to the ceiling portion 621 of the case portion 62 and extends to the side opposite to the light emission side. The rear projecting portion 612 projects rearward from the base portion 611 of the rear radiation fin 61b. In other words, the rear overhanging portion 612 overhangs on the side where the lamp main body 1 tilts.

Specifically, the rear projecting portion 612 projects to the rear side (outside) of the case portion 62 . A distal end portion 612a of the rear projecting portion 612 is positioned inside the outer edge 4a of the fixed frame 4 when the optical axis LA (FIG. 4) extends in the vertical direction. In the following description, the direction in which the optical axis LA (FIG. 4) of the light L extends may be referred to as "optical axis direction".

The rear projecting portion 612 is provided at the upper end portion of the rear radiation fin 61b. In other words, the rear projecting portion 612 is connected to the upper end portion of the base portion 611 of the rear radiation fin 61b. An end portion 612 b of the rear projecting portion 612 on the light emitting side is located on the side opposite to the light emitting side with respect to the ceiling portion 621 of the case portion 62 . In other words, the light-emitting end 612b of the rear projecting portion 612 is located above the ceiling portion 621 of the case portion 62 when the optical axis LA (FIG. 4) extends in the vertical direction.

Specifically, the rear projecting portion 612 faces one of the two mounting members 3 when the lighting device 100 is mounted on the ceiling C (FIG. 8). The length of the rear projecting portion 612 in the optical axis direction is such that when the lighting device 100 is attached to the ceiling C (FIG. 8), even if the lighting device body 1 is tilted rearward, the length of the bent state will remain unchanged. The length is such that the mounting member 3 does not interfere with the rear projecting portion 612 . In the following description, the end portion 612b of the rear projecting portion 612 on the light emitting side may be referred to as "the end portion 612b of the rear projecting portion 612".

The first outer heat radiation fins 61 c and the second outer heat radiation fins 61 d are arranged outside the case portion 62 . The first outer heat radiation fin 61c and the second outer heat radiation fin 61d have a rear projecting portion 612, like the rear heat radiation fin 61b. Light emitting side end portions 612b of the rear overhanging portions 612 provided on the first outer heat radiation fins 61c and the second outer heat radiation fins 61d are arranged relative to the ceiling portion 621 of the case portion 62 in the same manner as the rear heat radiation fins 61b. is located on the side opposite to the light exit side.

Next, the lighting fixture 100 of this embodiment will be described with reference to FIGS. 3 to 5. FIG. FIG. 3 is a bottom view showing the lighting fixture 100 according to this embodiment. FIG. 4 is a cross-sectional view of lighting fixture 100 along line IV-IV of FIG. FIG. 5 is a cross-sectional view of luminaire 100 along line VV in FIG. The front-rear direction and left-right direction shown in FIGS. 3 to 5 correspond to the front-rear direction and left-right direction shown in FIGS.

First, the radiator 6 will be further described with reference to FIG. As shown in FIG. 4 , the radiator 6 has connecting portions 63 . Specifically, the portion surrounded by the dashed line is the connecting portion 63 . The connecting portion 63 is plate-shaped. The base portion 611 of the plurality of front heat radiation fins 61 a described with reference to FIG. 2 is connected to the front surface of the connecting portion 63 . The rear surface of the connecting portion 63 is connected to the base portion 611 of the plurality of rear radiation fins 61b described with reference to FIG. A first outer heat radiation fin 61 c is connected to the left end of the connecting portion 63 , and a second outer heat radiation fin 61 d is connected to the right end of the connecting portion 63 . Further, the ceiling portion 621 of the case portion 62 is connected to the lower end portion (light emitting side end portion) of the connecting portion 63 .

Next, the lamp main body 1 will be further described with reference to FIG. As shown in FIG. 4 , the lamp main body 1 further has a light source 7 , a reflector 8 and a cover member 9 . The light source 7 is fixed to the case portion 62 of the radiator 6 . More specifically, the light source 7 is fixed to the inner surface of the ceiling portion 621 of the case portion 62 . Therefore, the light source 7 is arranged inside the case portion 62 . The reflector 8 is supported by the case portion 62 of the radiator 6 . In addition, in FIG. 4 , the dashed-dotted line SR indicates the position of the light source 7 . In the following description, the position of the light source 7 may be described as "the position SR of the light source 7".

The light source 7 emits the light L described with reference to FIGS. 1 and 2. FIG. The light source 7 has a light emitting element such as an LED (Light Emitting Diode). For example, the light source 7 may be a COB (Chip on Board). Alternatively, the light source 7 may be an SMD (Surface Mount Device). The light source 7 may have one light emitting element or may have a plurality of light emitting elements. The reflector 8 is made of synthetic resin, for example, and has an inverted conical shape, and reflects downward the light L emitted by the light source 7 .

The cover member 9 is fixed to the case portion 62 of the radiator 6 . A cover member 9 covers the light source 7 . The cover member 9 is made of a material that allows the light L to pass therethrough. Covering the light source 7 with the cover member 9 makes it difficult for foreign matter such as dust to adhere to the light source 7 . Therefore, it is possible to prevent the light source 7 from malfunctioning due to adhesion of foreign matter such as dust to the light source 7 .

In this embodiment, the cover member 9 is made of glass. Therefore, since the cover member 9 of the present embodiment has a higher heat resistance temperature than resin, it is less susceptible to heat than a resin cover member. Specifically, deformation and discoloration due to heat are less likely to occur. Therefore, according to this embodiment, it is possible to maintain the desired optical characteristics as compared with the case of using a resin cover member. Specifically, when the cover member 9 is deformed by heat, the light distribution characteristics change. Moreover, when the cover member 9 changes color due to heat, the light color of the light L emitted from the lighting device 100 changes. Therefore, according to the present embodiment, it is possible to suppress changes in light distribution characteristics and light color due to heat, as compared with the case where a resin cover member is used.

In addition, since the cover member 9 of the present embodiment is less susceptible to heat than a resin cover member, it can be arranged closer to the light source 7 than a resin cover member. Furthermore, when the cover member is made of resin, it is necessary to make the cover member, for example, dome-shaped and away from the light source 7 in order to make it less susceptible to heat. On the other hand, the cover member 9 of the present embodiment is less susceptible to heat than the resin cover member, and thus can be formed in a flat plate shape. Therefore, the production of the cover member 9 is facilitated. Specifically, a dome-shaped resin cover member requires a molding die. Moreover, when making the cover member made of glass into a dome shape, it is necessary to cut a flat glass plate and then mold it into a dome shape. On the other hand, a flat glass cover member can be produced simply by cutting a flat glass plate into a predetermined shape.

Next, the support portion 2 will be further described with reference to FIG. As shown in FIG. 4 , the fixed frame 4 has an annular or substantially annular frame portion 41 . Here, the fact that the frame portion 41 is substantially annular indicates that the frame portion 41 is partially interrupted in the circumferential direction. The rotating frame 5 is positioned inside the frame portion 41 .

The support part 2 further has a support member 21 . The support member 21 is fixed to the fixed frame 4 and rotatably supports the rotating frame 5 . Specifically, the support member 21 supports the rotary frame 5 so as to be rotatable in the rotation direction CR with the optical axis LA as the central axis.

In this embodiment, the support member 21 is a screw B2. The shaft of the screw B2 passes through the frame portion 41 of the fixed frame 4 from the outside to the inside. As a result, the tip portion of the shaft of the screw B2 protrudes inside the frame portion 41 . The rotating frame 5 has an engaging portion 52 extending in the circumferential direction. The engaging portion 52 is arranged inside the frame portion 41 and engages with the tip portion of the shaft of the screw B2. By engaging the tip of the shaft of the screw B2 with the engaging portion 52, the rotary frame 5 is supported by the screw B2. Further, by extending the engaging portion 52 in the circumferential direction, the rotating frame 5 is supported by the screws B2 so as to be rotatable in the rotating direction CR.

Subsequently, the first outer heat radiation fins 61c and the second outer heat radiation fins 61d will be further described with reference to FIG. As shown in FIG. 5, the first outer heat radiation fins 61c and the second outer heat radiation fins 61d each have extensions 613. As shown in FIG.

The extended portion 613 of the first outer heat radiation fin 61c indicates a portion of the first outer heat radiation fin 61c on the light emitting side of the position SR of the light source. Similarly, the extended portion 613 of the second outer heat radiation fin 61d indicates the portion of the second outer heat radiation fin 61d on the light emitting side of the position SR of the light source. Therefore, the tip portion 613a (the end portion on the light emitting side) of the extension portion 613 is positioned on the light emitting side with respect to the position SR of the light source. In other words, the tip 613a (the end on the light emitting side) of the extension 613 is located below the position SR of the light source when the optical axis LA extends in the vertical direction.

Further, the distal end portion 613a of the extension portion 613 forms a space with the support portion 2 (fixed frame 4 and rotating frame 5). As a result, the heat dissipation property of the radiator 6 is improved. Specifically, the space between the extension portion 613 of the first outer heat radiation fin 61c and the support portion 2 communicates with the space between the front heat radiation fin 61a and the rear heat radiation fin 61b and the first outer heat radiation fin 61c. As a result, the flowability of air between the front heat radiation fins 61a and the rear heat radiation fins 61b and the first outer heat radiation fins 61c is improved. Therefore, the heat dissipation property of the radiator 6 is improved. Similarly, the space between the extension part 613 of the second outer radiation fin 61d and the supporting part 2 communicates with the space between the front radiation fin 61a and the rear radiation fin 61b and the second outer radiation fin 61d. , the flowability of air between the front heat radiation fins 61a and the rear heat radiation fins 61b and the second outer heat radiation fins 61d is improved. Therefore, the heat dissipation property of the radiator 6 is improved.

Subsequently, the support portion 2 and the case portion 62 of the radiator 6 will be further described with reference to FIG. As shown in FIG. 5, the rotary frame 5 has a fitting hole 53. As shown in FIG. The fitting hole 53 radially penetrates the rotating frame 5 . The case portion 62 of the radiator 6 has a protruding portion 622 that protrudes radially outward. The projecting portion 622 fits into the fitting hole 53 of the rotating frame 5 . As a result, the rotating frame 5 supports the case portion 62 of the radiator 6 so as to be tiltable (rotatable) in the tilting direction CL with the direction in which the projecting portion 622 extends as the central axis.

The support portion 2 further has a shaft member 22 . The shaft member 22 is arranged at a position facing the projecting portion 622 in the radial direction, and supports the case portion 62 of the radiator 6 so as to be tiltable (rotatable) in the tilting direction CL.

In this embodiment, the shaft member 22 is a screw B3. Further, the rotating frame 5 has a screw hole 54 at a position facing the fitting hole 53 in the radial direction. The shaft of the screw B3 is screwed into the screw hole 54 from the outside of the rotating frame 5 . As a result, the screw B3 is fixed to the rotating frame 5 and the tip of the shaft of the screw B3 protrudes inside the rotating frame 5 . Further, the case portion 62 of the radiator 6 has a fitting hole 623 at a position facing the projecting portion 622 in the radial direction. The tip of the shaft of the screw B3 is fitted into the fitting hole 623 of the case portion 62 . As a result, the case portion 62 of the radiator 6 is supported by the screws B3 so as to be tiltable (rotatable) in the tilting direction CL.

As described above with reference to FIG. 5, the projecting portion 622 provided on the case portion 62 of the radiator 6 is supported by the fitting hole 53 of the rotating frame 5 so as to be tiltable (rotatably) in the tilting direction CL. be done. Further, the case portion 62 of the radiator 6 is supported by the shaft member 22 so as to be tiltable (rotatable) in the tilting direction CL. As a result, the lamp main body 1 becomes tiltable (rotatable) in the tilting direction CL.

Next, the front heat radiation fins 61a, the rear heat radiation fins 61b, the first outer radiation fins 61c, and the second outer radiation fins 61d will be further described with reference to FIG. FIG. 6 is a left side view showing the lighting device 100 according to this embodiment. As shown in FIG. 6 , each of the plurality of front heat radiation fins 61 a further has a front projecting portion 614 . The front projecting portion 614 is an example of a second projecting portion.

The front projecting portion 614 projects forward from the base portion 611 of the front heat radiation fin 61a described with reference to FIG. Specifically, the front projecting portion 614 projects forward (outside) of the case portion 62 . In other words, the forward projecting portion 614 projects to the side opposite to the side on which the lamp body 1 tilts. A distal end portion 614a of the front protruding portion 614 is located inside the outer edge 4a of the fixed frame 4 when the optical axis LA extends in the vertical direction.

The forward overhang 614 has an extension 613 . An extended portion 613 provided on the front heat radiation fin 61a indicates a portion of the front projecting portion 614 on the light emitting side of the light source position SR. Therefore, the tip portion 613a (the end portion on the light emitting side) of the extension portion 613 provided on the front heat radiation fin 61a is positioned on the light emitting side with respect to the position SR of the light source. In other words, the tip portion 613a (the end portion on the light emitting side) of the extension portion 613 provided on the front heat radiation fin 61a is positioned below the position SR of the light source when the optical axis LA is in the vertical direction. To position. Further, the tip portion 613a (the end portion on the light emission side) of the extension portion 613 provided on the front heat radiation fin 61a is in the state where the optical axis LA is along the vertical direction, the light leakage restricting portion 51 of the rotating frame 5 located above.

Similarly, the tip portion 613a (the end portion on the light emitting side) of the extension portion 613 provided on the first outer heat radiation fin 61c also causes light leakage from the rotary frame 5 when the optical axis LA is in the vertical direction. It is positioned above the restricting portion 51 . Although not shown, the tip portion 613a (the end portion on the light emitting side) of the extension portion 613 provided on the second outer heat radiation fin 61d also receives the light from the rotating frame 5 when the optical axis LA extends in the vertical direction. It is positioned above the leakage restricting portion 51 .

Also, the end portion 612b of the rear projecting portion 612 provided on the rear heat radiation fin 61b is located on the side opposite to the light emitting side with respect to the position SR of the light source. In other words, the end portion 612b of the rear overhanging portion 612 provided on the rear heat radiation fin 61b is located above the position SR of the light source when the optical axis LA is in the vertical direction.

Similarly, the end portion 612b of the rear projecting portion 612 provided on the first outer radiation fin 61c is also located on the side opposite to the light emitting side with respect to the position SR of the light source. Although not shown, the end portion 612b of the rear projecting portion 612 provided on the second outer radiation fin 61d is also located on the side opposite to the light emitting side with respect to the position SR of the light source.

Next, the lighting fixture 100 of this embodiment will be described with reference to FIGS. 7 and 8. FIG. FIG. 7 is a front view showing the lighting fixture 100 according to this embodiment. FIG. 8 is a cross-sectional view of luminaire 100 along line VIII-VIII of FIG. In FIG. 8, the lamp main body 1 in a state of being tilted rearward is indicated by a chain double-dashed line.

The lighting fixture 100 is attached to the ceiling C as shown in FIG. The mounting member 3 is folded when the lighting fixture 100 is mounted on the ceiling C. As shown in FIG. Specifically, the mounting member 3 is bent in a direction in which the tip portion approaches the lamp main body 1 .

Further, as shown in FIG. 8, the lamp main body 1 can be tilted rearward. When the lighting device 100 is attached to the ceiling C, the rear projecting portion 612 forms a gap with the bent mounting member 3 . More specifically, even when the lamp main body 1 is tilted rearward, the rear projecting portion 612 forms a gap with the bent mounting member 3 . Therefore, according to this embodiment, when the lighting fixture 100 is attached to the ceiling C, even if the lamp main body 1 is tilted rearward, the bent mounting member 3 does not extend to the rear projecting portion 612 . do not interfere with

Further, as shown in FIG. 8, the light leakage restricting portion 51 has a projecting portion 51a. The protruding portion 51a is provided at the upper end portion of the light leakage restricting portion 51 and protrudes rearward. According to the present embodiment, since the light leakage restricting portion 51 has the projecting portion 51a, the light L is less likely to leak to the ceiling space when the lamp main body 1 is tilted rearward.

As described above, according to the present embodiment, the front heat radiation fins 61a, the first outer heat radiation fins 61c, and the second outer heat radiation fins 61d each have extensions 613. As shown in FIG. The extension portion 613 extends toward the light emitting side from the position SR of the light source. In other words, the tip portion 613a of the extension portion 613 is located on the light emitting side with respect to the position SR of the light source. Therefore, the heat radiation performance of the radiator 6 can be improved without extending the radiation fins 61 upward. Moreover, since it is not necessary to extend the radiation fins 61 upward, the lighting fixture 100 can be installed in a place with a low ceiling space. Furthermore, since it is not necessary to extend the radiation fins 61 upward, it is difficult for the radiation fins 61 to interfere with a structure (for example, a heat insulating material) provided in the ceiling space.

Moreover, according to this embodiment, the heat dissipation property of the radiator 6 can be improved without radially extending the heat dissipation fins 61 . Therefore, the radiation fins 61 are less likely to interfere with structures (for example, heat insulating material) provided in the ceiling space. Furthermore, the radiation fins 61 are less likely to interfere with the ceiling C when the lamp main body 1 tilts. As a result, the rotating motion and tilting motion of the lamp main body 1 are less likely to be hindered by the structure provided in the ceiling space and the ceiling C.

The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and can be implemented in various aspects without departing from the gist of the present invention. Also, the plurality of constituent elements disclosed in the above embodiments can be modified as appropriate.

In order to facilitate the understanding of the invention, the drawings schematically show each component mainly, and the thickness, length, number, spacing, etc. It may be different from the actual from the top. Further, the configuration of each component shown in the above embodiment is an example and is not particularly limited, and it goes without saying that various modifications are possible within a range that does not substantially deviate from the effects of the present invention. .

For example, in the embodiment according to the present invention, the light source 7 has an LED as a light emitting element, but the light source 7 may have a light emitting element other than the LED, such as an organic EL (Electro-Luminescence) element.

Further, in the embodiment according to the present invention, the mounting member 3 is a long plate-like member, but the mounting member 3 may have any shape as long as it can mount the lighting device 100 to the mounting position. , is not limited to a long plate-like member. For example, the mounting member 3 may be an elastic wire. Specifically, a wire spring may be used as the mounting member 3 .

Moreover, in the embodiment according to the present invention, the radiator 6 has the first outer heat radiation fins 61c and the second outer heat radiation fins 61d, but both or one of the first outer heat radiation fins 61c and the second outer heat radiation fins 61d are omitted. may be

Further, in the embodiment according to the present invention, the first outer heat radiation fin 61c and the second outer heat radiation fin 61d have the extension 613, but the extension of both or one of the first outer heat radiation fin 61c and the second outer heat radiation fin 61d Part 613 may be omitted.

Also, in the embodiment according to the present invention, the configuration in which the heat radiation fins 61 are arranged along the front-rear direction has been described, but the heat radiation fins 61 may be arranged along the left-right direction. In other words, each radiation fin 61 may be arranged along a direction perpendicular to the direction in which the lamp body 1 tilts. In this case, the plurality of radiation fins 61 are arranged in the front-rear direction.

INDUSTRIAL APPLICABILITY The present invention is useful in the field of lighting fixtures.

Reference Signs List 1: lamp body 2: support portion 3: mounting member 6: radiator 7: light source 61: radiation fin 61a: front radiation fin 61b: rear radiation fin 61c: first outer radiation fin 61d: second outer radiation fin 62: Case part 100: Lighting fixture 612: Rear projecting part ( first projecting part)
612b: end 613: extension 613a: tip (end)
614: Front projecting portion ( second projecting portion)
CL: Tilt direction CR: Rotation direction L: Light LA: Optical axis

Claims (5)

a lamp body that emits light ;
a support portion that supports the lamp body so as to be tiltable;
with
The lamp body includes:
a light source that emits light;
a radiator having a plurality of heat radiating fins for radiating heat,
at least one of the plurality of heat radiating fins has an extension extending to a light emitting side from which the lamp body emits light;
the end of the extension portion on the light emission side is positioned on the light emission side with respect to the light source;
The radiator further has a case part in which the light source is arranged,
at least one of the plurality of heat radiating fins has a first projecting portion projecting to the outside of the case portion;
the light emitting side end of the first projecting portion is located on the side opposite to the light emitting side with respect to the light source;
The lighting equipment , wherein the first protruding portion is positioned on a side on which the lamp main body tilts . at least one of the plurality of heat radiating fins further has a second projecting portion projecting to the outside of the case portion;
2. The lighting fixture of claim 1, wherein said second overhang comprises said extension. 3. The lighting fixture according to claim 1 , wherein said support portion rotatably supports said lamp main body about an optical axis of light emitted by said lamp main body. further comprising a mounting member for mounting the lamp main body to the mounting position;
The lighting fixture according to any one of claims 1 to 3 , wherein the first protruding portion faces the mounting member. 5. The lighting fixture according to claim 4 , wherein said first projecting portion forms a gap with said mounting member when said lamp body is mounted at said mounting position.

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