JP6703741B2 - Lighting equipment - Google Patents

Description

Embodiments of the present invention relate to a lighting device in which a lighting body rotates to adjust an irradiation direction.

2. Description of the Related Art Conventionally, there is a downlight embedded in a ceiling as an illuminating device for illuminating a product or space in, for example, a store. In this lighting device, a lamp body is rotatably supported by a horizontal rotation shaft inside a frame body installed on the ceiling, and the lamp body is rotated and tilted with respect to the frame body, so that the lamp body is rotated. There is one that can adjust the irradiation direction of the light from.

In such an illuminating device, a radiating fin is provided on the upper part of the lamp in order to effectively dissipate the heat generated by the light source, but in order to avoid interference with the frame when the lamp is tilted. In many cases, the width of the heat radiation fin is narrowed, and then the protrusion height of the heat radiation fin is increased to ensure a desired heat radiation performance.

However, when the protrusion height of the heat dissipation fins is high and the height of the lamp body is high, the installation of the lighting device may be limited when the space above the ceiling is small.

JP2012-94316A

The problem to be solved by the present invention is to provide a lighting device capable of reducing the height of a lamp body while ensuring heat dissipation performance.

The lighting device of the embodiment includes a frame body and a lamp body. The frame has a tubular shape that opens in the vertical direction. The lamp body has a main body portion which is provided with a light source and emits light from the lower surface, and a heat radiation fin provided on the upper portion of the main body portion. The main body is disposed inside the frame and is rotatably supported by the frame by a rotary shaft that intersects a side surface of the main body. Radiating fin is projected upward of the frame, together with the notch to avoid interference with the frame is provided when tilted by rotating the main body portion, the direction to the upper side and the inclined notches Is provided with a part of the maximum outer diameter portion of the heat radiation fin, and when the main body is tilted at the maximum angle, the edge of the notch facing the upper surface of the frame becomes parallel to the upper surface of the frame. .

According to the present invention, it is possible to expect to reduce the height of the lamp body while ensuring the heat dissipation performance.

It is the side view which made the lamp body of the illuminating device which shows one embodiment incline the maximum angle in the 1st inclination direction. It is a side view in which the lamp body of the above lighting device is tilted by a maximum angle in the second tilt direction. It is a side view which turned the optical axis of the lamp body of an illuminating device same as the above. It is sectional drawing of an illuminating device same as the above. It is a side view of the lamp body of an illuminating device same as the above. It is an exploded perspective view seen from the upper part of the above-mentioned illuminating device. It is the perspective view seen from the lower part of an illuminating device same as the above.

Hereinafter, one embodiment will be described with reference to FIGS. 1 to 7.

As shown in FIGS. 6 and 7, the lighting device 10 is a downlight that is installed by being embedded in an embedding hole formed in a ceiling member, for example.

The lighting device 10 includes a frame body 11 as a decorative frame, a lamp body 12 attached to the frame body 11, and a power supply unit (not shown) that supplies power to the lamp body 12.

Then, as shown in FIGS. 1 to 4, 6, and 7, the frame body 11 is formed in a cylindrical shape that opens in the vertical direction. The frame body 11 is provided with a cylindrical tubular portion 20, an annular flange portion 21 projecting from the lower end of the tubular portion 20 to the outer diameter side, and an opening 22 that opens in the vertical direction inside the tubular portion 20. Has been formed. Around the cylindrical portion 20, a plurality of mounting springs 23 composed of leaf springs are mounted. The mounting spring 23 is inserted into the embedding hole of the ceiling member together with the frame body 11 in a state of being elastically deformed along the side surface of the frame body 11, is laterally developed above the ceiling member, and is attached to the upper surface side of the ceiling member. The frame body 11 is abutted and pulled up, and the frame body 11 is held by the ceiling member.

The frame body 11 is provided with an annular rotary table 24 on the upper part of the frame body 11 so as to be rotatable around the central axis 11a of the frame body 11. The rotary table 24 includes an annular portion 25 slidably mounted on the upper surface of the frame body 11 (cylindrical portion 20), and is bent downward from the periphery of the annular portion 25 so that the frame body 11 (cylindrical portion 20) is covered. It has a bent portion 26 facing the outer peripheral surface.

Inside the turntable 24, a pair of support portions 27 are bent downward so as to project to the inside of the frame body 11, and rotation shafts 28 rotatably supporting the lamp body 12 are rotatably supported by these support portions 27. It is provided facing each other. These rotating shafts 28 are horizontal shafts that intersect the side surfaces of the frame 11 and the lamp body 12 (main body), and are opposed to each other at a position displaced from the central axis 11a of the frame 11. Is provided.

A protrusion 29 is provided at one location on the periphery of the turntable 24, and when the turntable 24 is rotated, the protrusion 29 comes into contact with a stopper provided on the frame 11 to rotate the turntable 24. The rotation of the table 24 is restricted. Therefore, the rotary table 24 is rotatable with respect to the frame body 11 within a range until the protrusion 29 contacts the stopper, for example, within a range of about 350°.

The turntable 24 is rotatably attached to the frame body 11 by a plurality of pressing fittings 30. The holding metal fitting 30 is formed in an L-shaped cross section so as to be held in contact with the peripheral surface and the upper surface of the rotary table 24, and holds the rotary table 24 rotatably with respect to the frame 11.

A regulation mechanism 32 for regulating the tilt range of the lamp body 12 that rotates about a rotation shaft 28 is provided on the turntable 24. The regulation mechanism 32 includes an arm 33 mounted on the turntable 24, and a connecting portion 34 connected to the lamp body 12 through the arm 33. An arc-shaped guide groove 35 centering on the rotation shaft 28 is formed in the arm 33, and the connecting portion 34 is inserted into the guide groove 35. Then, when the lamp body 12 is rotated around the rotation shaft 28, the connecting portion 34 contacts one end or the other end of the guide groove 35, thereby restricting the tilt range of the lamp body 12. The two-dot chain line in the figure indicates the center axis 11a of the frame body 11, and the one-dot chain line indicates the center axis 12a of the lamp body 12.

For example, in FIG. 1, the direction in which the lamp body 12 inclines in the counterclockwise direction about the rotating shaft 28 is the first inclination direction a, and the opposite direction in the clockwise direction is the second inclination direction b. To do. In this case, since the rotating shaft 28 is located at a position displaced from the centers of the frame body 11 and the lamp body 12, the inclination angle θ1 of the lamp body 12 in the first inclination direction a is in the second inclination direction b. It becomes larger than the inclination angle θ2 of the lamp body 12. In the present embodiment, the inclination angle θ1 of the lamp body 12 in the first inclination direction a is 45°, and the inclination angle θ2 of the lamp body 12 in the second inclination direction b is 35°. The inclination angles θ1 and θ2 are not limited to such angles and can be set as appropriate.

The connecting portion 34 is provided with a washer, a spring washer, a screw, and the like, and is connected to the lamp body 12 and holds the arm 33 to exert a holding force. Hold in.

Further, as shown in FIGS. 1 to 7, the lamp body 12 includes a light source 40, a lens 41, a main body portion 42 provided with the light source 40 and the lens 41, and a radiation fin 43 provided on the upper portion of the main body portion 42. Is equipped with. The main body 42 and the radiation fin 43 are integrally formed. The main body portion 42 is rotatably arranged inside the frame body 11, and the heat radiation fins 43 project above the frame body 11.

The light source 40 is composed of a light emitting module 45. The light emitting module 45 includes a substrate 46 and a light emitting portion 47 formed on the surface of the substrate 46. The light emitting unit 47 includes a light emitting element. For example, the light emitting module 45 is configured by a COB module in which a plurality of LEDs as light emitting elements are mounted on a substrate 46 and the plurality of LEDs are sealed with a transparent resin containing a phosphor. The light emitting element is not limited to the LED, and other light emitting elements such as organic EL may be used.

The lens 41 is, for example, a Fresnel lens.

The main body 42 has a cylindrical shape that opens downward, a light source mounting portion 50 for mounting the light source 40 is provided on the upper surface, and an irradiation opening 51 from the light source 40 is formed on the lower surface. A wiring hole 52 is formed in the light source mounting portion 50. A lens 41 is arranged in the irradiation opening 51. Bearing portions 53 rotatably supported by the rotation shaft 28 are provided on both side surfaces of the main body portion 42. These bearing portions 53 are provided at positions deviated from the central axis 12a of the lamp body 12. The upper side of the peripheral surface of the main body portion 42 is provided so as to be reduced in diameter upward so as to prevent interference with the frame body when the lamp body 12 is inclined.

The radiating fins 43 project upward from the upper surface of the main body 42. The radiating fins 43 are provided in a plate shape in the direction in which the lamp body 12 rotates about the rotation shaft 28, and are arranged in a direction orthogonal to the direction in which the lamp body 12 rotates about the rotation shaft 28. They are arranged in parallel with each other. The peripheral surface of the heat radiation fin 43 is arranged inside the maximum outer diameter portion of the main body portion 42 and is provided in a circular shape, and the upper surface of the heat radiation fin 43 is a flat surface parallel to the lower surface of the main body portion 42. It is provided in.

A boss portion 54 to which the connecting portion 34 of the regulating mechanism 32 is connected is provided on the outer surface of the heat dissipating fin 43 located on one side of the heat dissipating fin 43 in the juxtaposed direction.

The heat dissipating fins 43 are provided with the lamp body 12 on both sides in the direction in which the lamp body 12 rotates about the rotation shaft 28, that is, on both sides of the first inclination direction a and the second inclination direction b. Notches 55a and 55b are provided for avoiding interference with the frame body 11 when rotated and tilted to a and b, respectively. The cutouts 55a and 55b are cut out in a substantially triangular cross section. Part of the maximum outer diameter portions 43a and 43b of the heat radiation fin 43 is provided on the upper side of the cutout portions 55a and 55b.

The notches 55a and 55b are provided with edges 56a and 56b facing the upper surface of the frame body 11 when the lamp body 12 is rotated and tilted in the respective inclination directions a and b. The edge portions 56a and 56b are configured to be parallel to the upper surface of the frame body 11 when the lamp body 12 is tilted in the respective tilt directions a and b by the maximum angle. That is, the angles α1 and α2 of the edge portions 56a and 56b with respect to the lower surface of the lamp body 12 (see FIG. 5) are the inclination angles θ1 and θ2 when the lamp body 12 is inclined by the maximum angle in the respective inclination directions a and b. It is provided to be the same. In this embodiment, the inclination angle θ1 is 45° and θ2 is 35°, so the angle α1 is 45° and the angle α2 is 35°.

The power supply unit is installed on the ceiling member separately from the lamp body 12, and is electrically connected to the light source 40 of the lamp body 12 by a cable. Then, the power supply unit converts AC power into predetermined DC power and supplies it to the light source 40 to turn on the light source 40.

Next, the operation of the lighting device 10 will be described.

FIG. 4 shows a state in which the central axis 12a (optical axis) of the lamp body 12 is directed directly downward and the irradiation direction of the lamp body 12 is set directly downward. In this state, the light from the light source 40 has a light distribution in which it is emitted in the immediately downward direction.

Then, the heat generated by the light emitting element of the light source 40 is transmitted from the main body portion 42 to the heat radiation fins 43 and is radiated from the heat radiation fins 43 into the air.

Further, FIG. 1 shows a state in which the lamp body 12 is rotated about the rotation axis 28 in the first inclination direction a and is inclined, and the inclination angle θ1 is the maximum angle in the first inclination direction a. It shows a state of being tilted so that In the present embodiment, a state in which it is inclined by 45° is shown. In this tilted state, the light from the light source 40 has a light distribution in which the light is radiated in an oblique 45° direction.

In this inclined state, since the notch 55a is provided on the side surface of the heat dissipation fin 43 in the first inclination direction a, the heat dissipation fin 43 does not interfere with the frame 11.

The edge portion 56a of the cutout portion 55a faces the upper surface of the frame body 11, the edge portion 56a is parallel to the upper surface of the frame body 11, and the maximum outer diameter portion 43a on the upper side of the cutout portion 55a is the frame body 11. Project more to the side than.

Therefore, the heat generated by the light emitting element of the light source 40 is transferred from the main body portion 42 to the heat radiation fins 43, and is also radiated into the air from the maximum outer diameter portion 43a on the upper side of the cutout portion 55a. At this time, since the maximum outer diameter portion 43a on the upper side of the cutout portion 55a projects laterally beyond the frame body 11, there is a convection flow of low temperature air through the space on the side of the frame body 11 to the heat radiation fins 43. It occurs smoothly and heat dissipation performance improves.

Further, FIG. 2 shows a state in which the lamp body 12 is rotated about the rotation shaft 28 in the second inclination direction b and is inclined, and the inclination angle θ2 is the maximum angle in the second inclination direction b. It shows a state of being tilted so that In the present embodiment, a state of being inclined by 35° is shown. In this tilted state, the light from the light source 40 has a light distribution in which the light is emitted in an oblique direction of 35°.

In this tilted state, since the notch 55b is provided on the side surface of the heat radiation fin 43 in the second tilt direction b, the heat radiation fin 43 does not interfere with the frame body 11.

The edge portion 56b of the cutout portion 55b faces the upper surface of the frame body 11, the edge portion 56b is parallel to the upper surface of the frame body 11, and the upper side of the maximum outer diameter portion 43b on the upper side of the cutout portion 55b is the frame. It projects more laterally than the body 11.

Therefore, the heat generated by the light emitting element of the light source 40 is transferred from the main body portion 42 to the heat radiation fins 43, and is also radiated into the air from the maximum outer diameter portion 43b on the upper side of the cutout portion 55b. At this time, since the upper side of the maximum outer diameter portion 43b on the upper side of the cutout portion 55b projects laterally beyond the frame body 11, air of low temperature flows through the space on the side of the frame body 11 to the heat radiation fins 43. Convection is generated smoothly and heat dissipation performance is improved.

As described above, in the illumination device 10 of the present embodiment, when the lamp body 12 is tilted at the maximum angle, the edge portions 56a and 56b of the cutout portions 55a and 55b face the upper surface of the frame body 11, and Since the portions 56a and 56b are parallel to the upper surface of the frame body 11, the radiation fin 43 is left with the portions other than the notches 55a and 55b, and the radiation performance of the radiation fin 43 can be improved.

Further, since the maximum outer diameter portions 43a, 43b on the upper side of the cutouts 55a, 55b project laterally beyond the frame body 11, air of low temperature flows through the space on the side of the frame body 11 to the heat radiation fins 43. Convection smoothly occurs, and the heat dissipation performance of the heat dissipation fins 43 can be improved.

Since the heat dissipation performance of the heat dissipation fins 43 is improved, the required heat dissipation performance can be ensured even if the height of the heat dissipation fins 43 is reduced.

Therefore, the lighting device 10 can reduce the height of the heat dissipation fins 43, that is, the height of the lamp body 12 while ensuring the necessary heat dissipation performance. As a result, the lighting device 10 can be installed even if the space above the ceiling is small.

In addition, the angles α1 and α2 of the edge portions 56a and 56b with respect to the lower surface of the lamp body 12 should be the same as the inclination angles θ1 and θ2 when the lamp body 12 is tilted by the maximum angle in the respective inclination directions a and b. Even by providing the edge portions 56a and 56b, the edge portions 56a and 56b are in parallel with the upper surface of the frame body 11, so that the above-described effects can be obtained.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the scope equivalent thereto.

10 Lighting device
11 frame
12 lights
28 Rotation axis
40 light source
42 Body
43 Heat dissipation fin
43a, 43b maximum outer diameter part
55a, 55b Notch
56a, 56b edge

Claims (2)

A cylindrical frame body that opens in the vertical direction;
A main body part that is provided with a light source and emits light from a lower surface, and a heat dissipation fin provided on an upper part of the main body part, the main body part being disposed inside the frame and intersecting a side surface of the main body part. Is rotatably supported by the frame body by a rotating shaft, and the heat dissipation fin is projected above the frame body, and when the body portion is rotated and tilted, A cutout portion for avoiding interference is provided, and a part of the maximum outer diameter portion of the heat radiation fin is provided on the upper side of the cutout portion and in the tilting direction , and the main body portion is tilted at the maximum angle. A lamp body in which an edge portion of the cutout portion facing the upper surface of the frame body is parallel to the upper surface of the frame body when opened.
A lighting device comprising: A cylindrical frame body that opens in the vertical direction;
A main body part that is provided with a light source and emits light from a lower surface, and a heat dissipation fin provided on an upper part of the main body part, the main body part being disposed inside the frame and intersecting a side surface of the main body part. Is rotatably supported by the frame body by a rotating shaft, and the heat dissipation fin is projected above the frame body, and when the body portion is rotated and tilted, A cutout portion for avoiding interference is provided, and the cutout portion is provided with an edge portion facing the upper surface of the frame body when the main body portion is rotated and tilted, and an upper side of the cutout portion. Further, a part of the maximum outer diameter portion of the heat dissipation fin is provided in the tilting direction , and the angle of the edge portion with respect to the lower surface of the main body portion is the same as the angle when the main body portion is tilted by the maximum angle. And a lamp provided in
A lighting device comprising:

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