JP2017130299A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which can reduce a clearance between a light body and a frame body side where a support body is disposed.SOLUTION: A lighting device 10 includes a frame body 11, a lighting body 13, and a support body 12. The frame body 11 is formed in a cylindrical state having an opening part 18 open in a vertical direction. The lighting body 13 has a light source 40, is provided with a clearance 60 with the inner peripheral face of the frame body 11, and is inserted into the opening part 18 of the frame body 11. The support body 12 includes: an annular flat plate part 26 turnably disposed on the upper surface of the frame body 11 along its peripheral direction; and a support part turnably supporting the lighting body 13 while centering around a turning axis 30 intersecting with a central axis 11a of the frame body 11. The flat plate part 26 is extended to the center direction of the opening part 18 of the frame body 11.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to an illuminating device capable of adjusting an irradiation direction of light from a lamp body.

  Conventionally, as a lighting device, there is a downlight installed on a ceiling. Further, in this lighting device, a cylindrical frame body installed on the ceiling, a support body disposed on the frame body so as to be rotatable along a circumferential direction, and a horizontal rotation shaft on the support body There is a lamp body that is supported so as to be rotatable around the lamp body, and the irradiation direction of light from the lamp body can be arbitrarily adjusted.

  In such an illuminating device, it is necessary to provide a gap in which the lamp body rotates for adjusting the inclination angle between the frame body side on which the support body is disposed and the lamp body. Dust may fall from the back of the ceiling or the back of the ceiling may be visible, which may make it look bad.

JP 2014-186805 A

  The problem to be solved by the present invention is to provide an illuminating device capable of reducing the gap between the lamp body and the frame body side on which the support is provided.

  The illumination device of the embodiment includes a frame, a lamp, and a support. The frame is provided in a cylindrical shape having an opening that opens in the vertical direction. The lamp body has a light source and is inserted through the opening of the frame body with a gap between the lamp body and the inner peripheral surface of the frame body. The support body supports the lamp body so as to be rotatable about an annular flat plate portion rotatably disposed along the circumferential direction on the upper surface of the frame body, and a rotation axis intersecting the central axis of the frame body. Having a supporting part. The flat plate portion extends in the center direction of the opening of the frame.

  According to the present invention, it can be expected to reduce the gap between the frame body side on which the support body is disposed and the lamp body.

It is sectional drawing of the illuminating device which shows one Embodiment. It is sectional drawing of an illuminating device same as the above. It is a disassembled perspective view of an illuminating device same as the above. It is a bottom view of an illuminating device same as the above. It is sectional drawing which rotated the lamp body of the illuminating device same as the above in the 1st inclination direction. It is sectional drawing which rotated the lamp body of the illuminating device same as the above in the 2nd inclination direction.

  Hereinafter, an embodiment will be described with reference to FIGS. 1 to 6.

  As shown in FIGS. 1 to 4, the lighting device 10 is a downlight that is installed in an embedded hole formed in a ceiling member, for example.

  The lighting device 10 includes a frame body 11 as a decorative frame, a support body 12 attached on the frame body 11, a lamp body 13 supported by the support body 12 and inserted into the frame body 11, and a lamp body 13 A power supply unit (not shown) for supplying power to the is provided.

  The frame 11 is formed in a cylindrical shape that opens in the vertical direction with the central axis 11a as the center. The frame 11 includes a cylindrical tube portion 16 and an annular flange portion 17 projecting from the lower end of the tube portion 16 toward the outer diameter side. An opening 18 that opens in the vertical direction is formed inside the tube portion 16. A plurality of spring mounting portions 19 and a plurality of metal fitting mounting portions 20 are formed on the outside of the cylindrical portion 16, respectively. A plurality of attachment springs 21 constituted by leaf springs are attached to the plurality of spring attachment portions 19, respectively. A plurality of presser fittings 22 as a plurality of presser parts that press the support 12 along the upper end of the frame 11 are attached to the plurality of metal fixture attaching parts 20 with screws 23. A stopper portion 24 is provided on the upper portion of any one of the metal fitting mounting portions 20 so as to restrict the rotational range of the support 12 in the circumferential direction. Then, the mounting spring 21 is expanded to the side above the ceiling member by being inserted into the embedding hole of the ceiling member together with the frame 11 in a state of being elastically deformed along the side surface of the frame 11, and the ceiling member The frame body 11 is lifted upward by being in contact with the upper surface side, and the frame body 11 is configured to be held on the ceiling member.

  The support 12 is disposed on the upper surface of the frame 11 so as to be rotatable in the circumferential direction around the central axis 11a of the frame 11. The support 12 is made of sheet metal, for example, and includes an annular flat plate portion 26 and a bent portion 27 bent downward from the outer peripheral side of the flat plate portion 26. The flat plate portion 26 is slidably placed along the circumferential direction on the upper surface of the frame body 11 (cylinder portion 16), and the bent portion 27 is opposed to the outer peripheral surface of the frame body 11 (cylinder portion 16). .

  The flat plate portion 26 has a flat plate shape and an annular shape, and has a radial width dimension wider than the thickness of the cylindrical portion 16 of the frame body 11. The inner peripheral side of the flat plate portion 26 extends in the center direction of the opening 18 of the frame body 11, and the outer peripheral side of the flat plate portion 26 extends in the outer diameter direction of the frame body 11. A cover portion 28 that protrudes from the inner peripheral surface of the frame 11 and protrudes above the opening 18 is provided on the inner peripheral side of the flat plate portion 26.

  A pair of support portions 29 are bent downward so as to protrude from the inner peripheral portions of the flat plate portion 26 (cover portion 28) facing each other to the inside of the frame body 11. Rotating shafts 30 that rotatably support the lamp body 13 are provided at the tips of the support portions 29 so as to face each other. These rotation shafts 30 are orthogonal to the central axis 11a of the frame 11 and are orthogonal to each other at positions shifted from the central axis 11a of the frame 11. It has been.

  A protrusion 31 protrudes at one location around the periphery of the support 12. When the support 12 is rotated, the protrusion 31 comes into contact with the stopper portion 24 of the frame 11, thereby supporting the support 12. Is restricted. Accordingly, the support 12 is rotatable with respect to the frame 11 within a range until the protrusion 31 contacts the stopper portion 24, for example, within a range of about 350 °.

  The support 12 is rotatably attached to the frame 11 by a plurality of presser fittings 22. The presser fitting 22 is formed in a substantially L-shaped cross section, abuts on the outer peripheral surface and the upper surface of the support body 12, respectively, and positions the support body 12 in the radial direction with respect to the frame body 11, and the support body 12 is attached to the frame. The upper surface of the body 11 is held so as to be rotatable along the circumferential direction.

  On the support 12, a restriction mechanism 32 that restricts the inclination range of the lamp 13 that rotates about the rotation shaft 30 is provided. The restriction mechanism 32 includes an arm 33 attached on the support body 12 and a connecting portion 34 connected to the lamp body 13 through the arm 33. The arm 33 is formed with an arcuate guide groove 35 centered on the rotation shaft 30, and the connecting portion 34 is inserted into the guide groove 35. Then, when the lamp body 13 is rotated about the rotation shaft 30, the connecting portion 34 abuts on one end or the other end of the guide groove 35, thereby restricting the tilt rotation of the lamp body 13. The center axis 11a of the frame 11 is shown in the two-dot chain line in FIGS. 5 and 6, and the center axis 13a of the lamp body 13 is shown in the one-dot chain line in FIGS. 1, 2, 5, and 6.

  For example, in FIG. 1, the direction in which the lamp body 13 is inclined counterclockwise about the rotation axis 30 is the first inclination direction a, and the direction in which the lamp body 13 is inclined in the opposite clockwise direction is the second inclination direction b. To do. In this case, since the rotation shaft 30 is at a position shifted from the center of the frame body 11 and the lamp body 13, the inclination angle θ1 (see FIG. 5) of the lamp body 13 in the first inclination direction a is the second. The inclination angle θ2 of the lamp body 13 in the inclination direction b is larger than the inclination angle θ2 (see FIG. 6). In this embodiment, the tilt angle θ1 of the lamp body 13 in the first tilt direction a is 45 °, and the tilt angle θ2 of the lamp body 13 in the second tilt 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 includes a washer, a spring washer, a screw, and the like. The connecting portion 34 is connected to the lamp body 13 and holds the arm 33 to exert a holding force. Hold on.

  The lamp body 13 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 radiating fin 43 provided on the upper portion of the main body portion 42. The main body 42 and the heat radiating fins 43 are integrally formed. The main body 42 is rotatably inserted inside the frame body 11, and the heat radiating fins 43 protrude above the frame body 11.

  The light source 40 includes a light emitting module 44. The light emitting module 44 includes a substrate 45 and a light emitting element 46 mounted on the surface of the substrate 45. For example, the light emitting module 44 is configured by a COB module in which a plurality of LEDs as the light emitting elements 46 are mounted on a substrate 45 and the plurality of LEDs are sealed with a transparent resin containing a phosphor. Therefore, a light emitting portion 47 that emits light is formed on the surface of the substrate 45. The light emitting element 46 is not limited to an LED, and other light emitting elements such as an organic EL may be used.

  As the lens 41, for example, a Fresnel lens is used.

  The main body 42 has a cylindrical shape that opens downward, and is provided with a light source mounting portion 50 for attaching the light source 40 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 part 50. A lens 41 is disposed in the irradiation opening 51. On both side surfaces of the main body portion 42, bearing portions 53 that are rotatably supported by the rotation shaft 30 are respectively provided. These bearing portions 53 are provided at positions shifted from the central axis 13 a of the lamp body 13. The upper side of the peripheral surface of the main body portion 42 is provided so as to decrease in diameter upward in order to prevent interference with the frame body 11 when the lamp body 13 is inclined.

  The heat radiating fins 43 protrude upward from the upper surface of the main body 42. The radiating fins 43 are provided in a plate shape parallel to the direction in which the lamp body 13 rotates about the rotation axis 30, and are orthogonal to the direction in which the lamp body 13 rotates about the rotation axis 30. They are arranged in parallel in the direction with a predetermined interval. The peripheral surface of the radiating fin 43 is disposed 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 radiating fin 43 is a flat surface parallel to the lower surface of the main body portion 42. Is provided.

  A boss portion 54 to which the connecting portion 34 of the restricting mechanism 32 is connected is provided on the outer surface of the heat radiating fin 43 located on one side of the heat radiating fins 43 in the side-by-side direction.

  The radiating fins 43 are provided with the lamp body 13 on both sides in the direction in which the lamp body 13 rotates about the rotation shaft 30, that is, on both sides of the first tilt direction a and the second tilt direction b. Cutout portions 55a and 55b are provided for avoiding interference with the frame 11 when rotated to a and b. The notches 55a and 55b are notched in a substantially triangular cross section. On the upper side of the notches 55a and 55b, a part of the maximum outer diameter portions 43a and 43b of the radiating fin 43 is provided.

  The notches 55a and 55b are provided with edges 56a and 56b that face the upper surface of the frame 11 when the lamp 13 is rotated in the respective inclination directions a and b. The edges 56a and 56b are configured to be parallel to the upper surface of the frame 11 when the lamp body 13 is inclined at the maximum angle in the respective inclination directions a and b. That is, the angles α1 and α2 (see FIGS. 5 and 6 respectively) of the edges 56a and 56b with respect to the lower surface of the lamp body 13 are inclinations when the lamp body 13 is tilted at the maximum angle in the respective tilt directions a and b. It is provided to be the same as the angles θ1 and θ2. In this embodiment, since the inclination angle θ1 is 45 ° and the inclination angle θ2 is 35 °, the angle α1 is 45 ° and the angle α2 is 35 °.

  A gap 60 is provided between the frame body 11 and the lamp body 13 so that the lamp body 13 can rotate without interfering with each other. The gap 60 is provided over the entire circumference between the inner peripheral surface of the frame 11 and the outer peripheral surface of the lamp body 13.

  On the gap 60, an inner peripheral side of the flat plate portion 26 of the support body 12 arranged on the upper surface of the frame body 11, that is, a cover portion 28 is projected. The cover portion 28 includes a first cover portion 28a in the direction in which the lamp body 13 rotates in the first tilt direction a, and a second cover portion 28b in the direction in which the lamp body 13 rotates in the second tilt direction b. And covering portions 28c on both sides (third) in the direction orthogonal to the direction in which the lamp 13 rotates, are provided over the entire circumference. In the present embodiment, in order to bend the support portion 29 from the flat plate portion 26 (cover portion 28), cut portions are provided on both sides in the width direction of the support portion 29, and a part of the cut portion is a gap 60. Although not protruding upward, the cover portion 28 may protrude over the gap 60 over the entire circumference by arbitrarily setting the shape and position of the support portion 29.

  The protruding width of the cover portion 28 from the inner peripheral surface of the frame 11 is such that the cover portions 28c on both sides are larger than the first cover portion 28a and the second cover portion 28b. Further, the protruding width of the cover portion 28 is different on both sides in the direction in which the lamp body 13 rotates, that is, the protruding width of the first covering portion 28a is larger than the protruding width of the second covering portion 28b. It has become. This is because the rotation shaft 30 is provided at a position shifted from the center of the frame body 11 and the lamp body 13, and the distance from the rotation shaft 30 to the cover portion 28 is different in each direction in which the lamp body 13 rotates. Therefore, on the side where the distance from the rotating shaft 30 to the cover portion 28 is short, in order to avoid interference with the rotating lamp 13 compared to the side where the distance from the rotating shaft 30 to the cover portion 28 is far. In addition, the protruding width of the cover portion 28 is reduced.

  Further, the power supply unit is installed on a ceiling member, for example, separately from the lamp body 13, and is electrically connected to the light source 40 of the lamp body 13 by a cable. Then, the power supply unit converts AC power into predetermined DC power and supplies it to the light source 40, and turns on the light source 40.

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

  FIG. 1 shows a state in which the central axis 13a (optical axis) of the lamp body 13 is directed downward and the irradiation direction of the lamp body 13 is set to the downward direction. In this state, the light distribution is such that the light from the light source 40 is irradiated in the downward direction.

  The heat generated by the light emitting element 46 of the light source 40 is transmitted from the main body 42 to the heat radiating fins 43 and is radiated from the heat radiating fins 43 into the air.

  FIG. 5 shows a state in which the lamp 13 is rotated in the first inclination direction a about the rotation axis 30 and is inclined, and the inclination angle θ1 is the maximum angle in the first inclination direction a. The state inclined so as to become is shown. In the present embodiment, a state of being inclined by 45 ° is shown. In this inclined state, the light from the light source 40 is distributed in an oblique 45 ° direction.

  In this inclined state, the notch portions 55a are provided on the side surfaces of the radiation fins 43 in the first inclination direction a, so that the radiation fins 43 do not interfere with the frame body 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. It protrudes to the side.

  Therefore, the heat generated by the light emitting element 46 of the light source 40 is transmitted from the main body portion 42 to the heat radiating fin 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 protrudes to the side of the frame body 11, the convection in which air having a low temperature flows through the radiation fins 43 through the space on the side of the frame body 11 It occurs smoothly and heat dissipation performance is improved.

  FIG. 6 shows a state in which the lamp 13 is rotated in the second inclination direction b around the rotation axis 30 and the inclination angle θ2 is the maximum angle in the second inclination direction b. The state inclined so as to become is shown. In this embodiment, the state inclined by 35 ° is shown. In this inclined state, the light from the light source 40 is distributed in an oblique direction of 35 °.

  In this inclined state, the notch portions 55b are provided on the side surfaces of the radiation fins 43 in the second inclination direction b, so that the radiation fins 43 do not interfere with the frame body 11.

  The edge 56b of the notch 55b faces the upper surface of the frame 11, the edge 56b is parallel to the upper surface of the frame 11, and the upper side of the maximum outer diameter portion 43b on the upper side of the notch 55b is the frame. Projects to the side of the body 11.

  Therefore, the heat generated by the light emitting element 46 of the light source 40 is transmitted from the main body portion 42 to the heat radiating fin 43, and is also radiated into the air from the maximum outer diameter portion 43b on the upper side of the notch 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 protrudes to the side of the frame body 11, air having a low temperature flows to the radiation fins 43 through the space on the side of the frame body 11. Convection occurs smoothly and heat dissipation performance is improved.

  Further, the cover portion 28 of the support body 12 disposed on the upper surface of the frame body 11 is projected on the gap 60 between the frame body 11 and the lamp body 13. Therefore, the opening size on the upper surface side of the gap 60 is reduced, dust falling from the back of the ceiling is reduced, and the back of the ceiling can be seen from the gap 60 when the lighting device 10 is looked up from below. This is because the lamp body 13 shown in FIGS. 1 and 4 is directed downward, the lamp body 13 shown in FIG. 5 is rotated in the first inclination direction a, and the lamp body 13 shown in FIG. The same effect can be obtained in any state in which is rotated in the second inclination direction b.

  As described above, in the lighting device 10 of the present embodiment, the inner peripheral side of the flat plate portion 26 of the support 12 extends in the center direction of the opening 18 of the frame body 11, that is, the inner peripheral side of the flat plate portion 26 is the frame body. By projecting onto the gap 60 between the lamp 11 and the lamp body 13, the gap 60 can be reduced, the fall of dust can be reduced, and the appearance can be improved.

  Moreover, even if the flat plate portion 26 is wider than the top surface of the frame body 11 and the support 12 is held by the plurality of presser fittings 22 with a relatively large amount of play, the flat plate portion 26 extends from the top surface of the frame body 11. It will not come off. Therefore, since it is possible to provide a relatively large amount of play for holding the support body 12 by the plurality of presser fittings 22, the rotation of the support body 12 relative to the frame body 11 can be made smooth.

  Further, the projecting width of the cover portion 28 from the inner peripheral surface of the frame body 11 is such that the cover portions 28 c on both sides orthogonal to the rotation direction of the lamp body 13 correspond to the rotation direction of the lamp body 13. Since the cover portion 28 is larger than the cover portion 28a and the second cover portion 28b, the cover portion 28 does not affect the rotation of the lamp body 13, and the opening area on the upper surface side of the gap 60 can be reduced.

  Further, since the rotation shaft 30 is provided at a position shifted from the center of the frame body 11 and the lamp body 13, the projecting width of the first cover portion 28a which is far from the rotation shaft 30 is increased, and the rotation shaft By reducing the protrusion width of the second cover portion 28b that is close to the distance 30, the interference between the cover portion 28 and the rotating lamp body 13 is prevented, and the opening area on the upper surface side of the gap 60 is reduced. be able to.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example 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 scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 Lighting equipment
11 Frame
11a Center axis
12 Support
13 Lamp
18 opening
26 Flat part
29 Support
30 Rotating axis
40 light source
60 Clearance

Claims (1)

A cylindrical frame having an opening that opens in the vertical direction;
A lamp that has a light source and is inserted into the opening of the frame with a gap provided between the frame and the inner peripheral surface;
An annular flat plate portion rotatably disposed along the circumferential direction on the upper surface of the frame body, and a rotation shaft that intersects with a central axis of the frame body so as to be pivotally supported. A support body having a support part, and the flat plate part extending in a center direction of the opening of the frame body;
An illumination device comprising:

Images