CN211821962U - Lighting apparatus - Google Patents

Abstract

The utility model provides a lighting device. The lighting fixture includes a lamp body for emitting light. The lamp main body is provided with a light source and a heat radiation body. The light source emits light. The heat radiating body is provided with a plurality of heat radiating fins for radiating heat. At least one of the plurality of radiating fins is provided with an extending part which extends to a light emitting side, and the light emitting side is the side of the lamp body emitting light. The extension portion has an end portion on the light emitting side positioned on the light emitting side with respect to the light source.

Description

Lighting apparatus

Technical Field

The utility model relates to a lighting device.

Background

A cylindrical lamp type lighting fixture is disclosed in patent document 1. The lighting apparatus of patent document 1 includes a light source unit and a radiator. The light source unit may be rotated and tilted. The heat dissipation body is provided with a plurality of heat dissipation fins. A plurality of heat radiating fins protrude above the light source unit.

[ patent document ]

Patent document 1: japanese laid-open patent publication No. 2013-196979

SUMMERY OF THE UTILITY MODEL

However, in the lighting apparatus of patent document 1, in order to improve the heat radiation performance of the heat radiator, the heat radiation fins need to be extended further upward. Extending the fins upward, for example, may impact a structure (e.g., insulation) disposed below the ceiling.

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 in which heat dissipation of a heat sink can be improved without extending a heat sink upward.

The lighting fixture disclosed in the present application includes a lamp body for emitting light. The lamp main body is provided with a light source and a heat radiation body. The light source emits light. The heat radiator is provided with a plurality of heat radiating fins for radiating heat. At least one of the plurality of radiating fins is provided with an extending part, the extending part extends to a light emitting side, and the light emitting side is the side of the light emitted by the lamp main body. The extension portion is located on the light emitting side with respect to the light source at an end portion on the light emitting side.

In the lighting apparatus disclosed in the present application, the heat radiating body may further include a container portion in which the light source is disposed. At least one of the plurality of heat radiating fins may also have a first protruding portion that protrudes to the outside of the container portion. The first extension may have the extension.

In the lighting apparatus disclosed in the present application, the heat radiating body may further include a container portion in which the light source is disposed. At least one of the plurality of heat radiating fins may also have a second projecting portion projecting to the outside of the container portion. The second protruding portion may be located at an end of the light emitting side opposite to the light source.

The lighting fixture disclosed in the present application may further include a support portion that supports the fixture body to be tiltable. The second protruding part may be located on a side where the lamp main body is inclined.

In the lighting fixture disclosed in the present application, the support portion may support the lamp main body so as to be rotatable about an optical axis of light emitted from the lamp main body as a center axis.

The lighting fixture disclosed in the present application may further include a mounting member for mounting the fixture body to a mounting position. The second projection may also be opposite the mounting member.

In the lighting fixture disclosed in the present application, a gap may be provided between the second projecting portion and the mounting member in a state where the lamp main body is mounted at the mounting position.

According to the utility model discloses, need not to upwards extend the fin just can improve the thermal diffusivity of radiator.

Drawings

Fig. 1 is a perspective view of a lighting fixture according to the present embodiment.

Fig. 2 is another perspective view of the lighting fixture according to the present embodiment.

Fig. 3 is a bottom view of the lighting fixture according to the present embodiment.

Fig. 4 is a cross-sectional view of the lighting fixture taken along line IV-IV of fig. 3.

Fig. 5 is a cross-sectional view of the lighting fixture taken along line V-V of fig. 3.

Fig. 6 is a left side view of the lighting fixture according to the present embodiment.

Fig. 7 is a front view of the lighting fixture according to the present embodiment.

Fig. 8 is a cross-sectional view of the lighting fixture taken along line VIII-VIII of fig. 7.

Detailed Description

Hereinafter, an embodiment of a lighting fixture according to the present invention will be described with reference to the drawings (fig. 1 to 8). However, the present invention is not limited to the following embodiments. Note that the description thereof may be omitted as appropriate. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and description thereof will not be repeated.

First, the lighting fixture 100 of the present embodiment will be described with reference to fig. 1. Fig. 1 is a perspective view of a lighting fixture 100 according to the present embodiment. The lighting fixture 100 of the present embodiment is mounted on a ceiling C (fig. 8). More specifically, the lighting fixture 100 of the present embodiment is embedded in a 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 body 1 has a heat sink 6. The support 2 has a fixed frame 4 and a rotating frame 5. The rotary frame 5 has a light leakage preventing part 51.

In the following description, for the sake of convenience of understanding, the side of the rotary frame 5 where the light leakage preventing portion 51 is provided is defined as the "front side" and the opposite side to the front side is defined as the "rear side", and the illumination apparatus 100 of the present embodiment is described. The lighting fixture 100 of the present embodiment will be described with reference to the right side when the lighting fixture 100 is viewed from the rear side being defined as the "right side" and the left side when the lighting fixture 100 is viewed from the rear side being defined as the "left side". The lighting fixture 100 of the present embodiment will be described below with reference to the lamp body 1, in which the side on which the support portion 2 is disposed is defined as the "lower side" and the opposite side to the lower side is defined as the "upper side". Here, "upper" and "lower" correspond to "upper" and "lower" in a state where the lighting fixture 100 is mounted on the ceiling C (fig. 8). Fig. 1 shows the lighting fixture 100 as viewed obliquely from the left front and upward.

The lamp main body 1 emits light L. The support portion 2 supports the lamp main body 1. The support portion 2 of the present embodiment supports the lamp main body 1 to be rotatable and tiltable. More specifically, the fixed frame 4 supports the rotating frame 5 to be rotatable, and the rotating frame 5 supports the lamp main body 1 to be tiltable.

Specifically, the fixed frame 4 and the rotating frame 5 are annular or substantially annular, and the fixed frame 4 supports the rotating frame 5 so as to be rotatable in the circumferential direction of the fixed frame 4 and the rotating frame 5. The substantially ring-shaped fixed frame 4 means that the fixed frame 4 is partially missing in the circumferential direction. Similarly, the substantially ring-shaped rotating frame 5 means that the rotating frame 5 is partially missing in the circumferential direction.

In the rotating frame 5, the width (dimension) of the light leakage preventing portion 51 in the vertical direction is larger than that of the other portion (the portion other than the light leakage preventing portion 51).

The light leakage preventing portion 51 prevents the rear light L from leaking between the lamp body 1 and the rotating frame 5 when the lamp body 1 is tilted rearward. Specifically, the light leakage preventing portion 51 prevents a gap from being generated between the lamp body 1 and the rotating frame 5 after the lamp body 1 is tilted rearward. Alternatively, the light leakage preventing portion 51 reduces the gap generated between the lamp body 1 and the rotating frame 5 after the lamp body 1 is tilted rearward. According to the present embodiment, since the light leakage preventing portion 51 is provided in the rotating frame 5, the light L is less likely to leak to the ceiling when the lamp body 1 is tilted to the rear side. Thus, even if the lamp main body 1 is inclined rearward, the lighting effect of the lighting fixture 100 is not easily lowered. In order to suppress a decrease in luminous efficiency of the lighting apparatus 100, the inner surface (surface on the side of the lamp body 1) of the light leakage preventive portion 51 is preferably white-colored. Alternatively, the inner surface of the light leakage preventive portion 51 is preferably a mirror surface.

The light leakage prevention part 51 also restricts the tilt direction of the lamp main body 1. In the present embodiment, the light leakage prevention portion 51 restricts the front tilt of the lamp main body 1. Specifically, when the lamp main body 1 is tilted forward, the lamp main body 1 abuts against the light leakage preventing portion 51, and the tilt of the lamp main body 1 forward is restricted. Therefore, the lamp main body 1 is inclined to the rear side.

Further, since the lamp main body 1 and the rotary frame 5 are rotatable, the front-back direction and the left-right direction change depending on the rotational positions of the lamp main body 1 and the rotary frame 5.

The mounting member 3 mounts the lamp body 1 to a mounting position. Specifically, the mounting member 3 is fixed to the support portion 2, thereby mounting the support portion 2 to the mounting position. By attaching the support portion 2 to the attachment position, the lamp body 1 can be attached to the attachment position. In the present embodiment, the mounting position is a 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 by a screw B1. When the lighting fixture 100 is not mounted on the ceiling C (fig. 8), the mounting member 3 protrudes from the fixed frame 4 in the radial direction. The mounting member 3 is freely bent in a direction in which a tip end portion thereof approaches the lamp body 1. When the lighting fixture 100 is mounted on the ceiling C (fig. 8), the mounting member 3 is bent to generate a biasing force. Due to this force, the lighting fixture 100 is mounted to the ceiling C (fig. 8). The mounting member 3 is, for example, a leaf spring.

The lighting apparatus 100 of the present embodiment includes 2 mounting members 3. In the present embodiment, 2 mounting members 3 are arranged at equal intervals. By arranging 2 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 the mounting members 3 is not particularly limited, and may be more than 1. The position where the mounting members 3 are arranged is also not particularly limited, and the intervals between a plurality of mounting members 3 may not be equal.

The heat radiator 6 radiates heat generated by the lamp body 1. The heat radiator 6 contains a material having high thermal conductivity. The heat radiator 6 is made of metal, for example. Specifically, the heat radiator 6 may be made of aluminum or an aluminum alloy.

The heat radiating body 6 has a plurality of heat radiating fins 61. A plurality of heat radiating fins 61 radiate heat. The plurality of fins 61 are arranged in the left-right direction. Also, the plurality of fins 61 are all plate-shaped. The fins 61 are arranged along the front-rear direction. By providing the heat sink 6 with the plurality of heat radiation fins 61, the specific surface area of the heat sink 6 is increased, and the heat radiation performance of the heat sink 6 is improved.

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

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

Next, the lighting fixture 100 of the present embodiment will be described with reference to fig. 2. Fig. 2 is another perspective view of the lighting fixture 100 according to the present embodiment. Specifically, fig. 2 shows the lighting fixture 100 as viewed obliquely from the left and rear upward.

As shown in fig. 2, the heating body 6 has a container portion 62. In the present embodiment, the container portion 62 is cylindrical. Specifically, the container part 62 is open on the light emitting side, which is the side from which the light L is emitted. The container portion 62 has a ceiling portion 621 on the opposite side of the light emitting side.

The several front side heat radiation fins 61a each have a base 611. The base portion 611 is connected to the ceiling portion 621 of the container portion 62 and extends on the opposite side of the light emitting side.

The plurality of rear side fins 61b each have a base 611 and a rear protrusion 612. The rear extension 612 is an example of a second extension. The base portion 611 of the rear side heat sink 61b is connected to the ceiling portion 621 of the container portion 62 and extends on the opposite side of the light emitting side. The rear protrusion 612 protrudes rearward from the base 611 of the rear fin 61 b. In other words, the rear extension portion 612 extends to the side where the lamp main body 1 is inclined.

Specifically, the rear extension portion 612 extends toward the rear side (outer side) of the container portion 62. When the optical axis LA (fig. 4) is in the vertical direction, the distal end portion 612a of the rear extension portion 612 is located more inward than the outer edge 4a of the fixed frame 4. In the following description, the direction in which the optical axis LA (fig. 4) of the light L extends is sometimes referred to as the "optical axis direction".

The rear protrusion 612 is provided at the upper end of the rear fin 61 b. In other words, the rear protrusion 612 is connected to the upper end of the base 611 of the rear side fin 61 b. The end 612b of the rear extension portion 612 on the light emitting side is located on the opposite side of the light emitting side from the ceiling portion 621 of the container portion 62. In other words, when the optical axis LA (fig. 4) is in the vertical direction, the end 612b of the rear extension 612 on the light output side is located above the ceiling 621 of the container 62.

Specifically, when the lighting fixture 100 is mounted on the ceiling C (fig. 8), the rear extension 612 is positioned opposite 1 of the 2 mounting members 3. The length of the rear protrusion 612 in the optical axis direction satisfies the following condition: in a state where the lighting fixture 100 is mounted on the ceiling C (fig. 8), even if the lamp body 1 is tilted to the rear side, the bent mounting member 3 does not collide with the rear extension portion 612. In the following description, the end 612b of the rear extension portion 612 on the light output side may be referred to as "end 612b of the rear extension portion 612".

The first outer fin 61c and the second outer fin 61d are disposed outside the container portion 62. The first and second outer fins 61c and 61d also have rear extensions 612, similar to the rear fin 61 b. Similarly to the rear side fins 61b, in the rear protruding portion 612 provided in the first and second outer fins 61c and 61d, the end portion 612b on the light emitting side is also located on the opposite side of the light emitting side with respect to the ceiling portion 621 of the container portion 62.

Next, the lighting fixture 100 of the present embodiment will be described with reference to fig. 3 to 5. Fig. 3 is a bottom view of the lighting fixture 100 according to the present embodiment. Fig. 4 is a sectional view of the lighting fixture 100 taken along line IV-IV of fig. 3. Fig. 5 is a sectional view of the lighting fixture 100 taken along the line V-V of fig. 3. In addition, the front-rear direction and the left-right direction in fig. 3 to 5 correspond to the front-rear direction and the left-right direction in fig. 1 and 2.

First, the radiator 6 will be further described with reference to fig. 4. As shown in fig. 4, the radiator 6 has a coupling portion 63. Specifically, the portion surrounded by the broken line is the coupling portion 63. The coupling portion 63 is plate-shaped. The base 611 of the front fins 61a described with reference to fig. 2 is connected to the front surface of the connection portion 63. The bases 611 of the plurality of rear side fins 61b described with reference to fig. 2 are connected to the rear surface of the connection portion 63. The first outer fin 61c is connected to the left end of the coupling portion 63, and the second outer fin 61d is connected to the right end of the coupling portion 63. Further, a ceiling portion 621 of the container portion 62 is connected to a lower end portion (end portion on the light emitting side) of the connection portion 63.

Next, the lamp body 1 will be further described with reference to fig. 4. As shown in fig. 4, the lamp body 1 further has a light source 7, a reflection plate 8, and a cover member 9. The light source 7 is fixed in the container portion 62 of the heating body 6. More specifically, the light source 7 is fixed to the inner surface of the ceiling portion 621 of the container portion 62. Therefore, the light source 7 is disposed inside the container portion 62. The reflector 8 is supported by the container portion 62 of the radiator 6. In fig. 4, a one-dot chain line SR indicates the position of the light source 7. In the following description, the position of the light source 7 may be referred to as "position SR of the light source 7".

The light source 7 emits light L as explained with reference to fig. 1 and 2. The light source 7 includes 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 smd (surface mount device). The light source 7 may have 1 light emitting element or several light emitting elements. The reflector 8 is formed of, for example, a synthetic resin into an inverted cone shape, and reflects the light L emitted from the light source 7 downward.

The lid member 9 is fixed to the container portion 62 of the heat radiator 6. The cover member 9 covers the light source 7. The cover member 9 is formed of a material that can transmit the light L. The cover member 9 covers the light source 7, so that foreign matter such as dust does not easily adhere to the light source 7. Therefore, it is possible to prevent the light source 7 from being broken down due to the attachment of foreign matter such as dust to the light source 7.

In the present embodiment, the cover member 9 is made of glass. Therefore, the heat-resistant temperature of the lid member 9 of the present embodiment is higher than that of the resin, and the lid member 9 is less susceptible to heat than a lid member made of the resin. In particular, deformation and discoloration due to heat are not easily caused. Thus, according to the present embodiment, the required optical characteristics can be maintained more favorably than in the case of using a cover member made of resin. Specifically, the light distribution characteristics change when the cover member 9 is deformed by heat. When the heat causes the lid member 9 to change color, the color of the light L emitted from the lighting fixture 100 changes. Therefore, according to the present embodiment, it is possible to more favorably suppress the change in light distribution characteristics and light color due to heat than the case of using a cover member made of resin.

Further, since the cover member 9 of the present embodiment is less susceptible to heat than a cover member made of resin, it can be placed closer to the light source 7 than a cover member made of resin. In the case where the cover member is made of resin, the cover member needs to be, for example, dome-shaped so as not to be easily affected by heat and be away from the light source 7. Specifically, the lid member needs to be formed into a dome shape protruding downward. In contrast, the cover member 9 of the present embodiment is less susceptible to heat than a cover member made of resin, and therefore can be formed into a flat plate shape. Therefore, the cover member 9 can be easily manufactured. Specifically, a dome-shaped resin cover member requires a molding die. In the case where the cover member made of glass is formed into a dome shape, a flat glass plate needs to be cut and then processed into a dome shape. In contrast, a flat glass cover member can be manufactured simply by cutting a flat glass plate into a predetermined shape.

Next, the support portion 2 will be further described with reference to fig. 4. As shown in fig. 4, the fixed frame 4 has a ring-shaped or substantially ring-shaped frame portion 41. Here, the frame portion 41 being substantially annular means that a part of the frame portion 41 is missing in the circumferential direction. The rotating frame 5 is located inside the frame portion 41.

The support portion 2 also 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 rotating frame 5 to be rotatable about the rotation direction CR centered on the optical axis LA.

In the present embodiment, the support member 21 is a screw B2. The shaft of the screw B2 passes through the frame part 41 of the fixed frame 4 from the outside to the inside. As a result, the tip 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 disposed inside the frame portion 41, and engages with a distal end portion of a shaft of the screw B2. The rotation frame 5 is supported by the screw B2 by engagement of the distal end portion of the shaft of the screw B2 with the engagement portion 52. The engagement portion 52 extends in the circumferential direction, and the rotation frame 5 is supported by the screw B2 so as to be rotatable in the rotation direction CR.

Next, with reference to fig. 5, the first outer fin 61c and the second outer fin 61d will be further described. As shown in fig. 5, each of the first outer fin 61c and the second outer fin 61d has an extension portion 613.

The extension portion 613 of the first outer fin 61c is a portion of the first outer fin 61c closer to the light exit side than the position SR of the light source. Similarly, the extension portion 613 of the second outer fin 61d is a portion of the second outer fin 61d closer to the light exit side than the position SR of the light source. Therefore, the distal end portion 613a (light-emitting-side end portion) 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, when the optical axis LA is in the vertical direction, the distal end 613a (light-emitting-side end) of the extension portion 613 is positioned below the position SR of the light source.

A certain space is provided between the distal end portion 613a of the extension portion 613 and the support portion 2 (the fixed frame 4 and the rotating frame 5). As a result, the heat radiation performance of the heat radiator 6 is improved. Specifically, the space between the front fin 61a and the first outer fin 61c is communicated with the space between the extension portion 613 of the first outer fin 61c and the support portion 2, thereby improving the air flow-through property between the front fin 61a and the first outer fin 61 c. Similarly, the space between the rear fin 61b and the first outer fin 61c is communicated with the space between the extension portion 613 of the first outer fin 61c and the support portion 2, thereby improving the air flow-through property between the rear fin 61b and the first outer fin 61 c. Therefore, the heat radiation performance of the heat radiator 6 is improved. Similarly, the space between the front fin 61a and the second outer fin 61d is communicated with the space between the extension portion 613 of the second outer fin 61d and the support portion 2, thereby improving the air flow-through property between the front fin 61a and the second outer fin 61 d. Further, the space between the rear fin 61b and the second outer fin 61d is communicated with the space between the extension portion 613 of the second outer fin 61d and the support portion 2, thereby improving the air flow-through property between the rear fin 61b and the second outer fin 61 d. Therefore, the heat radiation performance of the heat radiator 6 is improved.

Next, the support portion 2 and the container portion 62 of the radiator 6 will be further described with reference to fig. 5. As shown in fig. 5, the rotating frame 5 has a fitting hole 53. The fitting hole 53 radially penetrates the rotating frame 5. The container portion 62 of the heating body 6 has a protruding portion 622 that protrudes to the outside in the radial direction. The protrusion 622 is fitted into the fitting hole 53 of the rotating frame 5. As a result, the rotating frame 5 supports the container portion 62 of the radiator 6 to be tiltable (rotatable) in the tilting direction CL about the direction in which the protruding portion 622 extends as a center axis.

The support portion 2 further has a shaft member 22. The shaft member 22 is positioned to face the protruding portion 622 in the radial direction, and supports the container portion 62 of the radiator 6 so as to be tiltable (rotatable) in the tilting direction CL.

In the present embodiment, the shaft member 22 is a screw B3. The rotary frame 5 has a screw hole 54, and the screw hole 54 is located at a position radially opposed to the fitting hole 53. 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 rotary frame 5, and the tip of the shaft of the screw B3 protrudes inside the rotary frame 5. The container portion 62 of the radiator 6 has a fitting hole 623, and the fitting hole 62 is located at a position radially opposite to the protruding portion 622. The tip end portion of the shaft of the screw B3 is fitted into the fitting hole 623 of the container portion 62. As a result, the container portion 62 of the radiator 6 is supported by the screw B3 so as to be tiltable (rotatable) in the tilting direction CL.

As described above, as described with reference to fig. 5, the protruding portion 622 provided in the container portion 62 of the radiator 6 is supported by the fitting hole 53 of the rotating frame 5 so as to be tiltable (rotatable) in the tilting direction CL. The container 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 body 1 can be tilted (freely rotated) in the tilt direction CL.

Next, with reference to fig. 6, the front fin 61a, the rear fin 61b, the first outer fin 61c, and the second outer fin 61d will be further described. Fig. 6 is a left side view of the lighting fixture 100 according to the present embodiment. As shown in fig. 6, each of the plurality of front side fins 61a further has a front extension 614. The front extension 614 is an example of a first extension.

The front protruding portion 614 protrudes to the front side from the base 611 of the front side fin 61a described with reference to fig. 2. Specifically, the front extension portion 614 extends to the front side (outer side) of the container portion 62. In other words, the front extension portion 614 extends to the side opposite to the side inclined to the lamp main body 1. When the optical axis LA is in the vertical direction, the distal end portion 614a of the front extension 614 is located inward of the outer edge 4a of the fixed frame 4.

The front extension 614 has an extension 613. The extension 613 provided in the front side heat sink 61a is a portion of the front extension 614 closer to the light exit side than the position SR of the light source. Therefore, the distal end 613a (light-emitting end) of the extension 613 provided in the front side fin 61a is positioned on the light-emitting side with respect to the position SR of the light source. In other words, when the optical axis LA is in the vertical direction, the distal end 613a (light-emitting-side end) of the extension portion 613 provided in the front fin 61a is positioned below the position SR of the light source. When the optical axis LA is in the vertical direction, the distal end 613a (light-emitting end) of the extension 613 provided in the front fin 61a is positioned above the light leakage preventing portion 51 of the rotating frame 5.

Similarly, when the optical axis LA is in the vertical direction, the distal end 613a (light-emitting-side end) of the extension portion 613 provided in the first outer fin 61c is also positioned above the light leakage preventing portion 51 of the rotating frame 5. Although not shown, in a state where the optical axis LA is along the vertical direction, the distal end portion 613a (end portion on the light emitting side) of the extension portion 613 provided in the second outer fin 61d is also positioned above the light leakage preventing portion 51 of the rotating frame 5.

The end 612b of the rear extension 612 provided in the rear heat sink 61b is located on the opposite side of the light-emitting side from the position SR of the light source. In other words, in a state where the optical axis LA is along the vertical direction, the end 612b of the rear protrusion 612 provided in the rear heat sink 61b is located above the position SR of the light source.

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

Next, the lighting fixture 100 of the present embodiment will be described with reference to fig. 7 and 8. Fig. 7 is a front view of the lighting fixture 100 according to the present embodiment. Fig. 8 is a sectional view of the lighting fixture 100 taken along line VIII-VIII in fig. 7. In fig. 8, the lamp body 1 in a state of being inclined rearward is indicated by a two-dot chain line.

As shown in fig. 8, the lighting fixture 100 is installed in a ceiling C. When the lighting fixture 100 is mounted in the ceiling C, the mounting member 3 is bent. Specifically, the mounting member 3 is bent in a direction in which the tip end portion thereof approaches the lamp body 1.

As shown in fig. 8, the lamp body 1 can be tilted to the rear side. When the lighting fixture 100 is mounted on the ceiling C, a gap is provided between the rear extension 612 and the curved mounting member 3. More specifically, even when the lamp main body 1 is tilted rearward, the rear protruding portion 612 has a gap from the bent mounting member 3. Therefore, according to the present embodiment, even if the lamp main body 1 is tilted rearward in a state where the lighting fixture 100 is mounted on the ceiling C, the bent mounting member 3 does not collide with the rearward extending portion 612.

As shown in fig. 8, the light leakage preventing portion 51 has a projection 51 a. The projecting portion 51a is provided at the upper end of the light leakage preventing portion 51 and projects rearward. According to the present embodiment, since the light leakage preventing portion 51 includes the protruding portion 51a, the light L is less likely to leak to the ceiling even when the lamp main body 1 is tilted to the rear side.

As described above, according to the present embodiment, each of the front side fin 61a, the first outer side fin 61c, and the second outer side fin 61d has the extension portion 613. The extension portion 613 extends further to the light emitting side than the position SR of the light source. In other words, the distal end portion 613a of the extension portion 613 is positioned 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 heat radiation fins 61 upward. Further, since it is not necessary to extend the heat sink 61 upward, the lighting fixture 100 can be installed at a position low on the ceiling. Further, since it is not necessary to extend the heat radiation fins 61 upward, the heat radiation fins 61 do not easily collide with a structure (e.g., a heat insulating material) provided under the ceiling.

In addition, according to the present embodiment, the heat radiation performance of the radiator 6 can be improved without extending the heat radiation fins 61 in the radial direction. Therefore, the heat radiation fins 61 do not easily collide with the structure (e.g., heat insulating material) provided under the ceiling. Further, when the lamp main body 1 is tilted, the heat sink 61 does not easily collide with the ceiling C. As a result, the turning operation and the tilting operation of the lamp body 1 are not easily hindered by the structure provided under the ceiling and the ceiling C.

As described above, the embodiments of the present invention are explained with reference to the drawings (fig. 1 to 8). However, the present invention is not limited to the above-described embodiments, and can be implemented in various ways without departing from the scope of the invention. Note that, several constituent elements disclosed in the above embodiments may be changed as appropriate.

In the drawings, the constituent elements are schematically illustrated for convenience of understanding of the present invention, and for convenience of drawing, the thickness, length, number, interval, and the like of the constituent elements may be different from those of the actual drawings. The configuration of each component shown in the above embodiments is merely an example, and is not particularly limited, and various modifications can be made without substantially departing from the effect of the present invention.

For example, although the light source 7 includes an LED as a light emitting element in the embodiment described with reference to fig. 1 to 8, the light source 7 may include a light emitting element other than an LED such as an organic EL (Electro-Luminescence) element.

In the embodiment described with reference to fig. 1 to 8, the mounting member 3 is an elongated plate-like member, but the mounting member 3 is not limited to an elongated plate-like member as long as it is a shape that allows the lighting fixture 100 to be mounted at a mounting position. For example, the mounting member 3 may be a wire-shaped material having elasticity. Specifically, a wire spring may be used as the mounting member 3.

In the embodiment described with reference to fig. 1 to 8, the radiator 6 includes the first outer fin 61c and the second outer fin 61d, but both or one of the first outer fin 61c and the second outer fin 61d may be omitted.

In the embodiment described with reference to fig. 1 to 8, the first outer fin 61c and the second outer fin 61d have the extension portions 613, but the extension portions 613 of both or one of the first outer fin 61c and the second outer fin 61d may be omitted.

In the embodiment described with reference to fig. 1 to 8, the configuration in which the fins 61 are arranged along the front-rear direction is described, but the fins 61 may be arranged along the left-right direction. In other words, each of the heat sinks 61 may be arranged along a direction perpendicular to the direction in which the lamp main body 1 is inclined. In this case, the plurality of fins 61 are arranged in the front-rear direction.

[ industrial availability ]

The utility model discloses can be used to lighting apparatus's technical field.

[ description of reference numerals ]

1: the lamp main body is provided with a lamp main body,

2: a support portion for supporting the support portion,

3: the mounting of the component(s) is carried out,

6: a heat-dissipating body having a heat-dissipating body,

7: a light source for emitting light from a light source,

61: a heat-radiating fin, which is provided with a plurality of fins,

61 a: the front side heat-radiating fin is provided with a plurality of fins,

61 b: a heat sink on the back side of the heat sink,

61 c: a first outer heat sink fin having a first outer surface,

61 d: a second outside heat-radiating fin is arranged on the second side,

62: the container part is provided with a plurality of containers,

100: a lighting fixture is provided with a lighting fixture,

612: a rear projecting portion (second projecting portion),

612 b: the end part of the connecting rod is provided with a connecting rod,

613: an extension portion which is provided on the outer surface of the body,

613 a: a tip end portion (end portion),

614: a front extension part (first extension part),

CL: the direction of the inclination is the same as the direction of the inclination,

CR: the direction of the rotation is the same as the direction of the rotation,

l: the light is emitted from the light source,

LA: an optical axis.

Claims (7)

1. A lighting device having a lamp body for emitting light, characterized in that,

the lamp main body is provided with a light source and a heat radiation body,

the light source emits light in the form of light,

the heat dissipation body is provided with a plurality of heat dissipation fins for dissipating heat,

at least one of the plurality of fins has an extension,

the extension portion extends to a light emitting side, which is a side from which light is emitted from the lamp main body,

the extension portion is located on the light emitting side with respect to the light source at an end portion on the light emitting side.

2. The lighting apparatus according to claim 1,

the heat radiating body further includes a container portion in which the light source is disposed,

at least one of the plurality of fins has a first protrusion,

the first projecting portion projects to the outside of the container portion,

the first extension has the extension.

3. The lighting apparatus according to claim 1 or 2,

the heat radiating body further includes a container portion in which the light source is disposed,

at least one of the plurality of fins has a second protrusion,

the second projecting portion projects to the outside of the container portion,

the second protruding portion is located at an end on the light emitting side on an opposite side of the light emitting side with respect to the light source.

4. The lighting apparatus according to claim 3,

further comprises a support part for supporting the lamp body to be freely inclined,

the second extending part is positioned on one side of the lamp main body, which is inclined.

5. The lighting apparatus according to claim 4,

the support portion supports the lamp main body so as to be rotatable about an optical axis of light emitted from the lamp main body.

6. The lighting apparatus according to claim 3,

further comprises a mounting member for mounting the lamp body to a mounting position,

the second protrusion is opposite the mounting member.

7. The lighting apparatus according to claim 6,

when the lamp main body is attached to the attachment position, a gap is provided between the second projecting portion and the attachment member.

Images