JP2014143103A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device in which a radiator is properly attached by a small number of attachment members.SOLUTION: According to one embodiment, a lighting device including a radiator and a holding body is provided. The radiator thermally contacts with a light source. The holding body holds the radiator. One of the radiator and the holding body includes an opposing surface which faces the other of the radiator and the holding body and two through holes, i.e. a first through hole and a second through hole, which penetrate in a direction that intersects with the opposing surface. A length of the first through hole, which is measured in a first direction perpendicular to the direction that intersects with the opposing surface, is longer than a length of the first through hole measured in a second direction perpendicular to the direction that intersects with the opposing surface and the first direction. A length of the second through hole measured in the second direction is longer than a length of the second through hole measured in the first direction.

Description

  Embodiments described herein relate generally to a lighting fixture.

  There exists a lighting fixture which has a heat radiator for radiating the heat of a light source. The radiator is attached to the holding body in a state of being in thermal contact with the light source. A mounting member such as a screw is used for mounting the heat radiator. In the luminaire, it is desired that the radiator is appropriately attached with a smaller number of attachment members.

International Publication No. 2012/026420

  Embodiment of this invention provides the lighting fixture which can attach a heat radiator appropriately with the number of attachment members with few.

  According to the embodiment of the present invention, a lighting fixture including a heat radiating body and a holding body is provided. The radiator is in thermal contact with the light source. The holding body holds the heat radiating body. One of the heat radiating body and the holding body includes a facing surface facing the other of the heat radiating body and the holding body, and first and second through holes penetrating in a direction intersecting the facing surface. Have. The length of the first direction perpendicular to the direction intersecting the facing surface of the first through hole is different from each of the direction intersecting the facing surface of the first through hole and the first direction. Longer than the vertical length in the second direction. The length of the second through hole in the second direction is longer than the length of the second through hole in the first direction.

  There is provided a lighting fixture capable of appropriately attaching a heat radiator with a small number of attachment members.

It is a typical perspective view showing the lighting fixture which concerns on embodiment. Drawing 2 (a) and Drawing 2 (b) are typical side views showing a part of lighting fixture concerning an embodiment. Drawing 3 (a)-Drawing 3 (c) are mimetic diagrams showing the 1st frame concerning an embodiment. It is a schematic diagram showing the 2nd frame which concerns on embodiment. It is typical sectional drawing showing the 1st frame and 2nd frame which concern on embodiment. It is a typical perspective view showing a part of 1st frame which concerns on embodiment, and a part of 2nd frame. It is a typical perspective view showing a part of 1st frame which concerns on embodiment, and a part of 2nd frame. FIG. 8A and FIG. 8B are schematic top views illustrating a part of the first frame body and a part of the second frame body according to the embodiment. It is a typical exploded perspective view showing the lighting body concerning an embodiment. It is a typical fragmentary sectional view showing the lighting main part concerning an embodiment. It is a typical sectional view showing the 1st frame concerning an embodiment, and a maintenance frame. FIG. 12A and FIG. 12B are schematic views illustrating a heat radiator according to the embodiment. It is a typical top view showing the heat radiator concerning an embodiment. It is a schematic plan view showing the holding frame which concerns on embodiment. It is a typical sectional view showing a part of radiator and a holding frame concerning an embodiment. It is a typical perspective view showing the filter concerning an embodiment. FIG. 17A and FIG. 17B are schematic perspective views showing the holding frame according to the embodiment. It is typical sectional drawing showing the modification of the heat radiator which concerns on embodiment, and a holding frame.

Each embodiment will be described below with reference to the drawings.
The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the size ratio between the parts, and the like are not necessarily the same as actual ones. Further, even when the same part is represented, the dimensions and ratios may be represented differently depending on the drawings.
Note that, in the present specification and each drawing, the same elements as those described above with reference to the previous drawings are denoted by the same reference numerals, and detailed description thereof is omitted as appropriate.

Drawing 1 is a typical perspective view showing the lighting fixture concerning an embodiment.
As illustrated in FIG. 1, the lighting fixture 10 includes an illumination main body 12 that irradiates light toward an object, and a support portion 14 that supports the illumination main body 12.

  The illumination main body 12 holds a light source therein. The illumination body 12 has an irradiation window 12a for emitting light (hereinafter referred to as irradiation light) emitted from a light source. The irradiation light is emitted to the outside of the illumination main body 12 through the irradiation window 12a. Thereby, irradiation light is irradiated to a target object.

  The illumination main body 12 includes, for example, a heat radiator 20 and a holding frame 21. The heat radiating body 20 radiates heat generated with light emission from the light source, for example. For the radiator 20, for example, a metal material having high thermal conductivity such as aluminum is used. The holding frame 21 holds the radiator 20 and a lens provided inside. That is, in this example, the holding frame 21 functions as a holding body that holds the radiator 20. The holding frame 21 has a cylindrical shape, for example. In this example, the holding frame 21 is cylindrical. In this example, one end of the holding frame 21 serves as the irradiation window 12a. The radiator 20 is attached to the other end of the holding frame 21. That is, the radiator 20 is provided on the side opposite to the irradiation window 12a. For example, a resin material is used for the holding frame 21. In this example, the cylindrical holding frame 21 is shown as a holding body, but the holding body may be a member having an arbitrary shape that can hold the radiator 20.

  The support portion 14 is used to support the lighting body 12 and is used to attach the lighting fixture 10 to an attachment target such as a ceiling board. The lighting fixture 10 is attached to a ceiling board in the state which orient | assigned the irradiation window 12a downward, for example. The luminaire 10 is embedded in, for example, an embedding hole provided in the ceiling board. That is, the luminaire 10 is used as a so-called downlight. Below, the case where the lighting fixture 10 is used as a downlight is demonstrated to an example. However, the attachment target of the lighting fixture 10 is not limited to the ceiling plate, and may be, for example, an inner wall plate. Further, for example, the lighting fixture 10 may be attached to a dedicated mounting jig, and the lighting fixture 10 may be attached to a ceiling or the like via the mounting jig. That is, the attachment target of the lighting fixture 10 may be an attachment jig or the like.

  The support unit 14 includes a first frame body 41 and a second frame body 42. The first frame body 41 and the second frame body 42 are cylindrical. In this example, the first frame body 41 and the second frame body 42 are cylindrical. The support portion 14 rotatably supports the illumination main body 12 in a state of being inserted through the first frame body 41. The first frame body 41 rotatably supports the inserted illumination main body 12. In this example, the first frame body 41 rotatably supports the holding frame 21. The first frame body 41 and the second frame body 42 are not limited to a cylindrical shape, and may be any cylindrical shape such as a rectangular tube shape, for example.

Drawing 2 (a) and Drawing 2 (b) are typical side views showing a part of lighting fixture concerning an embodiment.
FIG. 2A and FIG. 2B show the illumination main body 12 and the first frame body 41. Further, in FIGS. 2A and 2B, the first frame body 41 is shown in a cut state in order to make the supported illumination main body 12 easy to see.
As shown in FIGS. 2A and 2B, the first frame body 41 rotates the illumination main body 12 about the rotation axis RA. The rotation axis RA extends in one direction perpendicular to the first central axis CA1 of the first frame body 41. Further, the rotation axis RA is separated from the first central axis CA1 in another direction perpendicular to the first central axis CA1 and the one direction. The first central axis CA1 is, for example, an axis that is parallel to the extending direction of the cylindrical first frame body 41 and passes through the center of a cross section perpendicular to the extending direction. Hereinafter, the direction of rotation of the illumination main body 12 around the rotation axis RA is referred to as “first rotation direction RD1”.

  Here, a direction parallel to the first central axis CA1 is defined as a Z-axis direction. One direction perpendicular to the Z-axis direction is taken as an X-axis direction. A direction perpendicular to the Z-axis direction and the X-axis direction is taken as a Y-axis direction. In this example, the one direction is an X-axis direction, and the another direction is a Y-axis direction. That is, in this example, the rotation axis RA extends in the X-axis direction and is separated from the first central axis CA1 in the Y-axis direction.

  The first frame 41 illuminates the first position shown in FIG. 2A and the second position shown in FIG. 2B by rotating the illumination body 12 in the first rotation direction RD1. The main body 12 is movable. In the first position, the optical axis OA of the irradiation light is parallel to the first central axis CA1. On the other hand, at the second position, the optical axis OA of the irradiation light is inclined with respect to the first central axis CA1. Thereby, in the lighting fixture 10, the direction in which irradiation light is irradiated can be changed. That is, the lighting fixture 10 is a so-called universal type lighting fixture. The optical axis OA is an axis that passes through the center of the light beam emitted from the irradiation window 12a, for example.

  In addition, when the first frame body 41 positions the illumination body 12 at the second position, the part 20p of the heat radiating body 20 and the irradiation window 12a are connected to the first frame body 41 from one end 41a of the first frame body 41. Project outward. The one end 41a is an end portion facing the same direction as the irradiation window 12a of the illumination main body 12 at the first position at the two end portions of the first frame body 41. In this example, in the second position, the entire irradiation window 12a protrudes from the one end 41a to the outside of the first frame body 41. For example, when the one end 41a is the lower end facing downward with respect to the ceiling, the first frame body 41 has a part 20p of the radiator 20 and the irradiation window 12a disposed below the one end 41a of the first frame body 41. To do.

  Thereby, in the lighting fixture 10, even when the optical axis OA is inclined with respect to the first central axis CA1, it is possible to prevent the irradiation light from being blocked by the mounting target such as the fixture itself or the ceiling board. it can.

  The second frame body 42 has a cylindrical main body portion 42 m into which the first frame body 41 can be inserted. The inner diameter of the main body portion 42 m of the second frame body 42 is larger than the outer diameter of the first frame body 41. The second frame 42 supports the first frame 41 inserted through the main body 42m so as to be rotatable about the second central axis CA2 of the main body 42m. Thereby, in the lighting fixture 10, while rotating the illumination main body 12 centering | focusing on the rotating shaft RA, rotating the 1st frame 41 and the illumination main body 12 centering on 2nd central axis CA2, arbitrary irradiation light is made. Can be directed. For example, the second central axis CA2 is an axis that is parallel to the extending direction of the main body portion 42m and passes through the center of the cross section perpendicular to the extending direction.

  Hereinafter, the direction of rotation of the first frame body 41 and the illumination main body 12 around the second central axis CA2 is referred to as “second rotation direction RD2”. In this example, the first frame body 41 has a vertically long cylindrical shape. Accordingly, for example, the deformation of the first frame body 41 when the illumination body 12 is rotated in the second rotation direction RD2 to adjust the direction of the irradiation light is suppressed, and the adjustment of the direction of the second rotation direction RD2 is smoothly performed. It can be carried out.

  For example, the main body 42m supports the first frame body 41 coaxially. That is, in this example, the second central axis CA2 of the main body portion 42m is substantially the same as the first central axis CA1 of the first frame body 41. The second central axis CA2 is not necessarily the same as the first central axis CA1.

Drawing 3 (a)-Drawing 3 (c) are mimetic diagrams showing the 1st frame concerning an embodiment.
3 (a) is a schematic perspective view, FIG. 3 (b) is a schematic right side view, and FIG. 3 (c) is a schematic left side view.
As shown in FIGS. 3A to 3C, the inner side surface 41 n of the first frame body 41 is provided with a pair of bearing portions 51 and 52 that protrude toward the center direction. The bearing portion 51 is provided with a through hole 51a extending along the X-axis direction. Similarly, the bearing portion 52 is also provided with a through hole 52a extending along the X-axis direction. The through hole 52a is provided at a position continuous with the through hole 51a in the X-axis direction. The diameter of the through hole 52a is substantially the same as the diameter of the through hole 51a. Accordingly, the rotation axis RA is set at a position separated from the first central axis CA1 in the Y-axis direction by the through holes 51a and 52a of the bearing portions 51 and 52.

  In this example, the distance along the Y-axis direction between the first central axis CA1 and the rotation axis RA is shorter than the radius of the inner diameter of the first frame body 41. The distance along the Y-axis direction between the first central axis CA1 and the rotation axis RA is shorter than the distance along the Y-axis direction between the first central axis CA1 and the inner side surface 41n. Thereby, for example, in the second position, the entire irradiation window 12a can be appropriately projected from the one end 41a of the first frame body 41 to the outside of the first frame body 41. Further, for example, at the first position, the position of the optical axis OA can be made substantially the same as the position of the first central axis CA1. That is, the illumination main body 12 can be arranged at the center of the first frame 41 at the first position. Thereby, the external appearance of the lighting fixture 10 can be improved, for example.

  The first frame body 41 is provided with a protrusion 41p. The protrusion 41p protrudes outward from the outer surface 41g of the first frame body 41. The protrusion 41p is used for restricting the rotation of the first frame body 41 in the second rotation direction RD2.

Drawing 4 is a mimetic diagram showing the 2nd frame concerning an embodiment.
The second frame body 42 is provided with a flange portion 60 and a plurality of spring attachment portions 61. The flange part 60 is provided at one end of the main body part 42m. The flange portion 60 protrudes outward from the outer surface 42g at one end of the main body portion 42m. For example, the plurality of spring mounting portions 61 are arranged at equal intervals around an axis about the second central axis CA2. In this example, three spring mounting portions 61 are provided on the second frame body 42. The number of spring mounting portions 61 is not limited to three, and may be any number of two or more. An attachment spring (not shown) is attached to each of the plurality of spring attachment portions 61. The attachment spring is, for example, a leaf spring shape or a torsion spring shape.

  When installing the luminaire 10 on the ceiling, an embedding hole is provided in the ceiling board in advance. At this time, the diameter of the embedding hole is larger than the outer diameter of the main body portion 42 m and smaller than the diameter of the flange portion 60. With the illumination window 12a facing the indoor side, the lighting fixture 10 inserts the second frame body 42 into the embedding hole from the indoor side, and makes the upper surface 60u of the flange portion 60 contact the ceiling plate. And a ceiling board is pinched | interposed with the flange part 60 and an attachment spring. Thereby, the lighting fixture 10 is attached to a ceiling board. The lower surface side of the flange part 60 is exposed to the ceiling. The second frame body 42 also functions as a decorative frame that covers the embedding hole and the like.

FIG. 5 is a schematic cross-sectional view showing the first frame and the second frame according to the embodiment.
As shown in FIGS. 4 and 5, the second frame body 42 is provided with ribs 62. The rib 62 is provided on the same side as the flange portion 60 of the main body portion 42m. The rib 62 protrudes from the inner side surface 42n of the second frame body 42 toward the center direction. The inner diameter of the main body 42 m at the portion where the rib 62 is provided is smaller than the outer diameter of the first frame body 41. As a result, the first frame body 41 inserted through the second frame body 42 abuts on the ribs 62, and the removal from the second frame body 42 is suppressed. In this example, one annular rib 62 is provided. For example, the plurality of ribs 62 may be provided at equal intervals around an axis about the second central axis CA2.

FIG. 6 is a schematic perspective view showing a part of the first frame and a part of the second frame according to the embodiment.
As shown in FIGS. 1 and 6, a retaining member 43 is attached to each spring attachment portion 61. The retaining member 43 suppresses the first frame body 41 from being detached from the second frame body 42. Further, as shown in FIG. 6, the retaining member 43 prevents the torsion spring 63 from coming off from the spring attachment portion 61 when the attachment spring is the torsion spring 63, for example.

  The retaining member 43 is attached to the spring attachment portion 61 by, for example, screwing. For example, a metal material is used for the retaining member 43. The retaining member 43 is formed, for example, by bending a metal plate.

  The retaining member 43 includes a spring pressing portion 43 a that presses the torsion spring 63 and a pair of frame body pressing portions 43 b and 43 c that press the first frame body 41.

  The torsion spring 63 is attached to the spring attachment portion 61 by inserting one end into a groove provided in the spring attachment portion 61. In a state where the retaining member 43 is attached to the spring attachment portion 61, the spring pressing portion 43 a is brought into contact with the coil portion of the torsion spring 63 attached to the spring attachment portion 61. Accordingly, the coil portion of the torsion spring 63 is sandwiched between the spring mounting portion 61 and the spring pressing portion 43 a, and the torsion spring 63 is held by the spring mounting portion 61.

  The frame body pressing portions 43 b and 43 c are inserted into the inner side surface 42 n of the second frame body 42 while being attached to the spring mounting portion 61, and are one end of the first frame body 41 inserted through the second frame body 42. It contacts 41b (the other end). The frame body pressing portions 43 b and 43 c are elastically deformed by, for example, contact with the one end 41 b of the first frame body 41 and press the first frame body 41 against the rib 62. As a result, the first frame body 41 is sandwiched between the retaining member 43 and the rib 62, and the first frame body 41 is prevented from coming off from the second frame body. Thus, the first frame body 41 is supported by the second frame body 42 so as to be rotatable in the second rotation direction RD2.

  In this example, the retaining member 43 has a function of retaining the torsion spring 63 and a function of retaining the first frame body 41. Without being limited thereto, a member for preventing the torsion spring 63 from coming off and a member for preventing the first frame 41 from coming off may be attached to the second frame 42.

FIG. 7 is a schematic perspective view showing a part of the first frame and a part of the second frame according to the embodiment.
FIG. 8A and FIG. 8B are schematic top views illustrating a part of the first frame body and a part of the second frame body according to the embodiment.
As shown in FIG. 4, FIG. 7, FIG. 8A and FIG. 8B, the second frame body 42 is provided with a rotation stopper mounting portion 66 for mounting the rotation stopper member 44. The rotation stop member 44 restricts the rotation of the first frame body 41 in the second rotation direction RD2 to a predetermined amount or less.

  The rotation stop mounting portion 66 is provided with a pair of protrusions 67 and 68. The protrusion 67 has an extending portion 67a extending along the circumferential direction of a circle centered on the second central axis CA2. Similarly, the protrusion 68 has an extending portion 68a extending along the circumferential direction of a circle centered on the second central axis CA2. The extending portion 68 a of the protrusion 68 extends in the opposite direction to the extending portion 67 a of the protrusion 67. The rotation stopper mounting portion 66 is provided with a screw hole 66a. The screw hole 66 a is disposed between the protrusions 67 and 68. The rotation stop member 44 is attached to the rotation stop attachment portion 66 by a screw 45 (holding member) corresponding to the screw hole 66a.

  The rotation stop member 44 includes a main body portion 44a, an engagement portion 44b, and a frame body pressing portion 44c. For example, a metal material is used for the rotation stop member 44. The engaging portion 44b and the frame body pressing portion 44c are formed, for example, by bending a metal plate. The main body 44a is provided with a long hole 44h. The elongated hole 44h can be inserted through the protrusions 67 and 68.

  The thickness of the main body 44 a is thinner than the height of the protrusions 67 and 68. The length of the long hole 44h is longer than the length from the tip of the extending portion 67a of the protrusion 67 to the tip of the extending portion 68a of the protrusion 68. Further, the width of the long hole 44h is wider than the widths of the protrusions 67 and 68 and narrower than the diameter of the head of the screw 45. The rotation stop member 44 is attached to the rotation stop attachment portion 66 in a state where the protrusions 67 and 68 are passed through the long hole 44h. The rotation preventing member 44 is prevented from coming off from the protrusions 67 and 68 by the screw 45. Accordingly, the rotation stopper member 44 is attached to the rotation stopper attachment portion 66 so as to be movable in the circumferential direction of the circle centered on the second central axis CA2 within the range of the long hole 44h.

  The number of protrusions provided on the rotation stop mounting portion 66 is not limited to two, but may be one or three or more. Further, in this example, a screw 45 is shown as a holding member that suppresses removal of the rotation stopper member 44 from the protrusions 67 and 68. The holding member is not limited to the screw 45, and may be any member that can prevent the rotation stopper member 44 from coming off, such as a rivet.

  The engaging portion 44b enters the movement path of the protrusion 41p provided on the outer side surface 41g of the first frame body 41 in a state where the anti-rotation member 44 is attached to the anti-rotation attachment portion 66. The engaging portion 44b engages with the protrusion 41p and restricts the rotation of the first frame body 41 in the second rotation direction RD2 to a predetermined amount or less. Thereby, for example, twisting of wiring for electrically connecting the light source and an external power source can be suppressed.

  Further, the rotation stopping member 44 moves in the circumferential direction along the protrusions 67 and 68 when the protrusion 41p and the engaging portion 44b are engaged. The rotation preventing member 44 includes a first restricting position (a position shown in FIG. 8A) that restricts the rotation of the first frame 41 in one direction in the second rotation direction RD <b> 2, and the first frame 41. It moves to a second restriction position (position shown in FIG. 8B) that restricts rotation in the other direction of the two rotation directions RD2.

  Thereby, for example, the rotation amount of the first frame body 41 in the second rotation direction RD2 can be set to 360 ° or more. For example, the rotation amount of the first frame 41 in the second rotation direction RD2 can be arbitrarily set such as 365 ° or 370 °. Thereby, illumination light can be directed to arbitrary directions, controlling rotation and suppressing twisting of wiring. For example, there is no restriction on the orientation when attaching the lighting fixture 10 to the ceiling or the like, and the mounting operation of the lighting fixture 10 can be facilitated.

  For example, the frame body holding portion 44 c enters the inner side of the inner side surface 42 n of the second frame body 42 in a state of being attached to the anti-rotation attachment portion 66, and the first frame body 41 inserted through the second frame body 42. It abuts on one end 41b. For example, the frame body pressing portion 44 c is elastically deformed by contact with the one end 41 b of the first frame body 41 and presses the first frame body 41 against the rib 62. In other words, the rotation stop member 44 also functions as a retaining member for the first frame body 41. The frame pressing portion 44c is provided as necessary and can be omitted. The rotation stop member 44 does not necessarily have a function of preventing the first frame body 41 from coming off.

  Note that the length of the frame body pressing portion 44c and the length of the frame body pressing portions 43b and 43c are longer than the amount of protrusion of the protrusion 41p from the outer surface 41g. That is, the frame body pressing portion 44c and the frame body pressing portions 43b and 43c are retracted from the movement path of the protrusion 41p.

FIG. 9 is a schematic exploded perspective view showing the illumination main body according to the embodiment.
As illustrated in FIG. 9, the illumination main body 12 includes the radiator 20 and the holding frame 21, and includes the substrate 22 and the lens unit 23. A plurality of light sources 25 are mounted on the surface 22 a of the substrate 22. The substrate 22 includes, for example, a wiring pattern. An electric circuit is configured on the substrate 22 by the wiring pattern and each light source 25. The plurality of light sources 25 are, for example, arranged concentrically. A wiring (not shown) is connected to the substrate 22, and electric power is supplied to the circuit from the outside through the wiring. As a result, the plurality of light sources 25 emit light according to the external power supply.

  For example, a light emitting diode (LED) is used as the light source 25. The light source 25 is, for example, an organic light emitting diode (OLED), an inorganic electroluminescence light emitting element, an organic electroluminescence light emitting element, or other electroluminescent light emitting element. Good.

  The radiator 20 is provided with an attachment surface 20 a for attaching the substrate 22. The area of the mounting surface 20a is the same as or slightly larger than the area of the surface 22a of the substrate 22. The board | substrate 22 is affixed on the attachment surface 20a of the heat radiator 20 via the heat radiating sheet 29, for example. As a result, the substrate 22 is held by the radiator 20. The heat radiator 20 is in thermal contact with each light source 25 via the substrate 22 or the heat radiating sheet. Thereby, for example, the heat generated with the light emission of each light source 25 is radiated by the radiator 20. For example, the influence of heat on each light source 25 can be suppressed. The shape of the surface 29 a of the heat dissipation sheet 29 is substantially the same as the shape of the surface 22 a of the substrate 22. The area of the surface 29a of the heat dissipation sheet 29 is, for example, one time larger than the area of the surface 22a of the substrate 22, and one time smaller than the area of the mounting surface 20a of the heat radiator 20. By adhering the substrate 22 to the radiator 20 via the radiator sheet 29, for example, the adhesion between the substrate 22 and the radiator 20 can be enhanced. The heat dissipation sheet 29 is insulative. Thereby, the insulation distance of the board | substrate 22 and the heat radiator 20 can be ensured appropriately. In the present specification, “thermally contacting” includes not only the case where the radiator 20 and the light source 25 are in direct contact but also the case where the other member having thermal conductivity is interposed. For example, as shown in this example, a substrate 22, a heat radiating sheet 29, or the like may be provided between the heat radiating body 20 and the light source 25. Heat radiation grease or the like may be provided between the heat radiator 20 and the light source 25.

  In this example, the substrate 22 is affixed to the radiator 20, but the substrate 22, each light source 25, and the like may be detachably attached to the radiator 20, for example. Each light source 25 may be replaceable with respect to the lighting fixture 10.

  For the lens unit 23, for example, optical glass or optical plastic is used. The lens unit 23 is light transmissive with respect to the light emitted from the light source 25. The lens unit 23 is transparent, for example. The lens unit 23 includes, for example, a cylindrical tube portion 23a and a bottom portion 23b that closes one end of the tube portion 23a. The lens unit 23 is provided with a plurality of lenses 26. The plurality of lenses 26 are provided corresponding to the plurality of light sources 25. Each lens 26 is disposed on the inner surface of the bottom 23b. Each lens 26 is, for example, hemispherical or conical. A concave portion 26 a that covers each light source 25 is provided at the apex portion of each lens 26. For example, the lens 26 collects the light emitted from the light source 25 and improves the light irradiation efficiency. As described above, the holding frame 21 is cylindrical. The lens unit 23 fits inside the holding frame 21 and is held by the holding frame 21.

FIG. 10 is a schematic partial cross-sectional view illustrating the illumination main body according to the embodiment.
As shown in FIG. 10, a step portion 21 d that changes the inner diameter is provided on the inner surface of the holding frame 21. The inner diameter of the portion 21n between the stepped portion 21d and the rear end 21b in the inner surface of the holding frame 21 is substantially the same as the outer diameter of the lens unit 23. The rear end 21b is an end opposite to the end that becomes the irradiation window 12a. On the other hand, the inner diameter of the holding frame 21 at the step portion 21 d is narrower than the outer diameter of the lens unit 23. Thereby, the lens unit 23 inserted through the holding frame 21 abuts on the stepped portion 21d, and the removal from the holding frame 21 is suppressed.

  The radiator 20 is attached to the rear end 21 b of the holding frame 21. The lens unit 23 inserted into the holding frame 21 is held in a state sandwiched between the holding frame 21 and the radiator 20. The length along the optical axis OA of the holding frame 21 and the length along the optical axis OA of the lens unit 23 are determined according to the length along the optical axis OA of the lens 26, for example. The lens unit 23 is held in the holding frame 21 with the positions of the light sources 25 and the lenses 26 determined.

  A portion 21t between the step portion 21d on the inner side surface of the holding frame 21 and the irradiation window 12a is a tapered surface whose inner diameter continuously increases from the step portion 21d toward the irradiation window 12a. A plurality of filter attachment portions 21f for detachably attaching the filter are provided on the inner surface portion 21t of the holding frame 21. In this example, two filter attachment portions 21f are provided. The two filter mounting portions 21f are provided at positions that are symmetric with respect to the optical axis OA. The number of filter attachment portions 21f may be three or more.

FIG. 11 is a schematic cross-sectional view illustrating a first frame body and a holding frame according to the embodiment.
As shown in FIGS. 9 and 11, the outer side surface 21 g of the holding frame 21 is provided with a hinge portion 27 that is raised in a columnar shape. The hinge part 27 extends in a direction perpendicular to the optical axis OA. For example, the hinge portion 27 protrudes in the Y-axis direction and extends in the X-axis direction. At both ends of the hinge portion 27, cylindrical mounting holes 27a and 27b extending in the extending direction of the hinge portion 27 are provided. The length along the X-axis direction of the hinge portion 27 is determined according to the distance along the X-axis direction between the pair of bearing portions 51 and 52 of the first frame body 41. The hinge portion 27 enters between the bearing portions 51 and 52, makes the attachment hole 27a face the through hole 51a, and makes the attachment hole 27b face the through hole 52a.

  The shaft 28a is inserted through the mounting hole 27a and the through hole 51a. The shaft 28b is inserted through the mounting hole 27b and the through hole 52a. Accordingly, the holding frame 21 is supported by the first frame body 41 so as to be rotatable in the first rotation direction RD1. For the shafts 28a, 28b, for example, flat head screws are used.

FIG. 12A and FIG. 12B are schematic views illustrating a heat radiator according to the embodiment.
FIG. 12A is a schematic perspective view, and FIG. 12B is a schematic cross-sectional view.
As shown in FIG. 12A and FIG. 12B, the radiator 20 is provided with a plurality of flat plate-like radiation fins 31 to 37 and a continuous portion 38. In this example, seven radiating fins 31 to 37 are provided.

  Each radiation fin 31-37 extends in a direction parallel to the optical axis OA. Each of the radiation fins 31 to 37 extends in a direction perpendicular to the rotation axis RA in a state where the illumination body 12 is supported by the first frame body 41 (see FIGS. 2A and 2B). The radiating fins 31 to 37 are arranged in a direction parallel to the rotation axis RA. That is, in this example, each of the radiation fins 31 to 37 extends in a direction parallel to the YZ plane and is arranged in the X-axis direction. Thus, by providing the heat dissipation fins 31 to 37 on the heat dissipating body 20, for example, the surface area of the heat dissipating body 20 is increased and the heat dissipating efficiency of the heat dissipating body 20 can be increased. In addition, the number of the radiation fins 31 to 37 provided on the radiator 20 is not limited to seven and may be an arbitrary number of two or more.

  The continuous portion 38 is a portion in which a part of each of the radiation fins 31 to 37 is made continuous in the part 20p exposed when the illumination main body 12 is located at the second position. The continuous portion 38 has, for example, a part 20p as a curved surface. Thereby, the continuous part 38 prevents the shape of each radiation fin 31-37 from exposing when the illumination main body 12 is located in the 2nd position. In other words, the continuous portion 38 is a portion that covers the radiation fins 31 to 37 so that the radiation fins 31 to 37 are not exposed when the illumination body 12 is positioned at the second position. Thereby, the external appearance of the lighting fixture 10 can be improved, for example.

  As illustrated in FIG. 12B, the continuous portion 38 continues only a part of the vicinity of the outer periphery of each of the radiating fins 31 to 37. Each of the radiation fins 31 to 37 extends to the mounting surface 20 a side from the end portion 38 a of the continuous portion 38. The thickness of the continuous portion 38 in the direction perpendicular to the optical axis OA and the rotation axis RA increases from the end portion 38a toward the mounting surface 20a (the irradiation window 12a side). The thickness of the continuous part 38 increases continuously, for example. Thereby, the moldability of the heat radiator 20 can be improved, for example. For example, when the heat radiator 20 is molded, the heat radiator 20 can be easily removed from the mold. Further, for example, heat can be prevented from staying on the back side of the continuous portion 38.

  The respective end portions 31a to 37a of the heat radiation fins 31 to 37 are formed from the one end 41b of the first frame body 41 to the first frame body when the illumination main body 12 is located at the first position or the second position. 41 and the 2nd frame 42 protrude outside (refer to Drawing 1, Drawing 2 (a), and Drawing 2 (b)). For example, when the one end 41b is the upper end, the end portions 31a to 37a are disposed above one end of the second frame 42 on the same side as the one end 41b and the one end 41b.

  The length along each optical axis OA of each radiation fin 31-37 decreases in the direction perpendicular to the rotation axis RA and from the rotation axis RA toward the optical axis OA. Moreover, the length along each optical axis OA of each radiation fin 31-37 becomes short, so that it leaves | separates from the center in the direction (X-axis direction) along rotation axis RA. That is, in this example, the radiation fin 34 located at the center in the X-axis direction is the longest, and the radiation fin 31 and the radiation fin 37 are the shortest.

  Thereby, each of the radiation fins 31 to 37 is in the direction perpendicular to the second central axis CA2 regardless of whether the illumination main body 12 is located at the first position or the second position. It comes to be located inside the outer surface 42g of the main body 42m of 42. In other words, each of the radiating fins 31 to 37 is located on the inner side of the outer surface 42g when projected onto a plane (XY plane) perpendicular to the second central axis CA2. In this example, each of the radiating fins 31 to 37 is positioned on the inner side of the outer surface 42g of the main body portion 42m of the second frame body 42 in the direction perpendicular to the second central axis CA2 (FIG. 2A ) And FIG. 2 (b)).

  Thereby, the space required for installation of the lighting fixture 10 can be saved, for example. For example, the space required for the ceiling can be saved. In addition, a plurality of lighting fixtures 10 may be installed side by side. At this time, if the radiator 20 protrudes outside the outer surface 42g, when the lighting body 12 is rotated in the second rotation direction RD2, the radiator 20 becomes the radiator 20 of the adjacent lighting fixture 10. There is a risk of touching. On the other hand, in the lighting fixture 10 according to the present embodiment, since the heat radiating body 20 is positioned on the inner side of the outer surface 42g, the direction of the second rotation direction RD2 even when the plurality of lighting fixtures 10 are installed side by side. Can be adjusted smoothly.

  Moreover, in the lighting fixture 10 which concerns on this embodiment, when the illumination main body 12 is located in a 2nd position by adjusting the length along optical axis OA as mentioned above, each of each radiation fin 31-37 is each. However, it does not contact the 1st frame 41 (refer FIG.2 (b)).

  Thereby, when the illumination main body 12 is located at the second position, a gap is generated between the illumination main body 12 and the first frame body 41. For example, a passage for air passing from the indoor side to the back of the ceiling can be formed, and the heat dissipation efficiency when the illumination main body 12 is located at the second position can be further increased.

FIG. 13 is a schematic plan view illustrating a heat radiator according to the embodiment.
As shown in FIG. 13, the heat radiator 20 includes an opposing surface 20 t facing the holding frame 21, and first and second through holes 101 and 102 penetrating in a direction intersecting the opposing surface 20 t. Have. The first through hole 101 and the second through hole 102 are used for attaching the heat radiating body 20 to the holding frame 21.

  The facing surface 20t faces, for example, the rear end 21b of the holding frame 21. In this example, the facing surface 20t has an annular shape. The shape of the facing surface 20t can be appropriately changed according to the shape of the holding frame 21 and the like. For example, a plurality of opposing surfaces 20t may be provided discretely. In this example, the facing surface 20t is parallel to the mounting surface 20a. The facing surface 20a is perpendicular to the optical axis OA. Accordingly, the facing surface 20t is also perpendicular to the optical axis OA. The facing surface 20t contacts, for example, the rear end 21b of the holding frame 21. The facing surface 20t may contact the holding frame 21 via, for example, an elastic seal member or spacer.

  In this example, the first through hole 101 and the second through hole 102 penetrate in a direction perpendicular to the facing surface 20t. In this example, the direction through which the first through hole 101 and the second through hole 102 pass is parallel to the optical axis OA. The direction through which the first through hole 101 and the second through hole 102 penetrate may be any direction that intersects the facing surface 20t.

  The first through hole 101 extends in a first direction ED1 perpendicular to the direction intersecting the facing surface 20t. The second through hole 102 extends in a second direction ED2 perpendicular to the direction intersecting the facing surface 20t and the first direction ED1. The length of the first through hole 101 in the first direction ED1 is longer than the length of the first through hole 101 in the second direction ED2. The length of the second through hole 102 in the second direction ED2 is longer than the length of the second through hole 102 in the first direction ED1. That is, the first through hole 101 and the second through hole 102 are long holes. In this example, the extending direction of the second through hole 102 is perpendicular to the extending direction of the first through hole 101. The direction in which the second through hole 102 extends may be inclined with respect to the direction in which the first through hole 101 extends. That is, the first through hole 101 only needs to have a component extending in the first direction ED1, and the second through hole 102 only needs to have a component extending in the second direction ED2.

  Here, the center of the first through hole 101 when projected onto a plane perpendicular to the direction intersecting the facing surface 20t is C1. The center of the second through hole 102 is C2. The center of the radiator 20 is C3. In this example, the plane perpendicular to the direction intersecting the facing surface 20t is a plane parallel to the facing surface 20t. In other words, it is the shape of the radiator 20 when viewed in the optical axis direction.

  In this example, a line segment L1 connecting the center C1 of the first through hole 101 and the center C2 of the second through hole 102 passes through the center C3 of the radiator 20. That is, an angle θ formed by a line segment connecting the center C1 of the first through-hole 101 and the center C3 of the heat radiator 20 and a line segment connecting the center C2 of the second through-hole 102 and the center C3 of the heat radiator 20. Is 180 °. The angle θ is not limited to 180 ° and may be an arbitrary angle. For example, the angle θ is preferably 170 ° or more and 180 ° or less. Thereby, for example, the stability of holding the radiator 20 by the holding frame 21 can be enhanced.

  In this example, the first direction ED1 is parallel to the line segment L1, and the second direction ED2 is perpendicular to the line segment L1. The directions of the first direction ED1 and the second direction ED2 are not limited to this, and may be any direction.

FIG. 14 is a schematic plan view illustrating a holding frame according to the embodiment.
As shown in FIG. 14, the holding frame 21 is provided with a first holding unit 111 and a second holding unit 112. The first holding unit 111 and the second holding unit 112 are provided facing the rear end 21b side. The first holding portion 111 is disposed at a position facing the first through hole 101 when the facing surface 20 t of the heat radiating body 20 is opposed to the holding frame 21. The second holding portion 112 is disposed at a position facing the second through hole 102 when the facing surface 20 t of the heat radiating body 20 is opposed to the holding frame 21. The 1st holding | maintenance part 111 and the 2nd holding | maintenance part 112 hold | maintain the attachment member 120 (refer FIG. 15) for attaching the heat radiator 20 to the holding frame 21. As shown in FIG. In this example, the 1st holding | maintenance part 111 and the 2nd holding | maintenance part 112 are the substantially cylindrical screw holes in which the screw groove was provided in the internal peripheral surface.

  For example, the diameter of the first holding part 111 is determined to be slightly smaller than the width of the first through hole 101 in the direction perpendicular to the first direction ED1. For example, the diameter of the second holding portion 112 is determined to be slightly smaller than the width of the second through hole 102 in the direction perpendicular to the second direction ED2. In this example, the diameter of the second holding part 112 is substantially the same as the diameter of the first holding part 111. That is, the screw sizes of the first holding part 111 and the second holding part 112 are the same. The screw size of the second holding part 112 may be different from the screw size of the first holding part 111.

FIG. 15 is a schematic cross-sectional view illustrating a part of the radiator and the holding frame according to the embodiment.
As shown in FIG. 15, a part of the attachment member 120 is inserted into each of the first through hole 101 and the second through hole 102. The first holding part 111 holds a part of the attachment member 120 inserted through the first through hole 101. The second holding portion 112 holds a part of the attachment member 120 inserted through the second through hole 102. The holding frame 21 sandwiches the radiator 20 together with the mounting members 120. As a result, the radiator 20 is held by the holding frame 21.

  In this example, the attachment member 120 is a screw having a size corresponding to the first holding part 111 and the second holding part 112. When the size of the second holding portion 112 is different from the size of the first holding portion 111, a screw having a size corresponding to each size may be prepared as the mounting member 120.

  The attachment member 120 has, for example, a shaft portion 120a and a head portion 120b. The shaft portion 120a has, for example, a round bar shape. The diameter of the shaft portion 120 a is determined corresponding to the diameter of the first holding portion 111 and the diameter of the second holding portion 112. A screw thread is provided on the outer peripheral surface of the shaft portion 120a. The height and pitch of the thread of the shaft part 120a correspond to the thread grooves of the first holding part 111 and the second holding part 112. The attachment member 120 meshes the thread of the shaft portion 120 a with the thread grooves of the first holding portion 111 and the second holding portion 112. Thereby, the attachment member 120 is held by the first holding part 111 and the second holding part 112.

  The head 120b is, for example, a disk having a larger diameter than the shaft 120a. The diameter of the head 120b is larger than the width of the first through hole 101 in the direction perpendicular to the first direction ED1 and the width of the second through hole 102 in the direction perpendicular to the second direction ED2.

  The length of the shaft portion 120a is longer than the length in the direction through which the first through hole 101 and the second through hole 102 pass. In the shaft portion 120a, the lengths of the portions penetrating from the first through hole 101 and the second through hole 102 are shorter than the depths of the first holding portion 111 and the second holding portion 112.

  The attachment member 120 inserts the shaft portion 120a into the first through hole 101, and causes the first holding portion 111 to hold the portion that protrudes from the first through hole 101 of the shaft portion 120a. The attachment member 120 inserts the shaft portion 120a into the second through hole 102, and causes the second holding portion 112 to hold the portion that protrudes from the second through hole 102 of the shaft portion 120a. As a result, the radiator 20 is sandwiched between the head 120 b of each mounting member 120 and the holding frame 21, and the radiator 20 is held by the holding frame 21 by each mounting member 120.

FIG. 16 is a schematic perspective view illustrating a filter according to the embodiment.
FIG. 16 shows a filter 80 that is detachably attached to the illumination body 12.
As shown in FIG. 16, the filter 80 includes a disk-shaped filter body 81 and a plurality of engaging claws 82. The filter 80 is, for example, a color rendering filter that enhances color rendering by cutting a specific wavelength of visible light. The filter 80 may be another optical filter such as an ND filter or a color filter.

  The diameter of the filter body 81 is substantially the same as, for example, the inner diameter of the portion of the holding frame 21 where the filter attachment portions 21f are provided. The side surface 81s of the filter body 81 is, for example, a tapered surface. The angle of the side surface 81s is substantially the same as the angle of the tapered surface portion 21t of the holding frame 21, for example.

  The plurality of engaging claws 82 are provided corresponding to the plurality of filter attachment portions 21 f of the holding frame 21. Accordingly, in this example, two engagement claws 82 are provided. Each engagement claw 82 is provided so as to protrude in the radial direction from the side surface 81 s of the filter body 81. In this example, each engaging claw 82 has a rectangular shape. The shape of each engagement claw 82 may be any shape that can be attached to each filter attachment portion 21f. The position of each engagement claw 82 corresponds to the position of each filter attachment portion 21f. In this example, the engaging claws 82 are provided at positions that are symmetric with respect to the center of the filter body 81. Each engaging claw 82 is provided with a hemispherical convex portion 82a. The convex portion 82a is provided on the surface of the engaging claw 82 that faces the optical axis direction.

  FIG. 17A and FIG. 17B are schematic perspective views showing the holding frame according to the embodiment. As illustrated in FIG. 17A and FIG. 17B, the filter attachment portion 21 f includes an insertion / extraction portion 85 and an engagement groove 86. The insertion / extraction portion 85 is a portion that is recessed in a part of the tapered surface portion 21t of the holding frame 21 and is substantially parallel to the optical axis OA. The depth of the insertion / extraction part 85 (the amount of recess from the inner surface of the holding frame 21) corresponds to the length of the engagement claw 82 of the filter 80 (the amount of protrusion from the side surface 81s). Thereby, in the insertion / extraction part 85, the engagement nail | claw 82 can be inserted / extracted in an optical axis direction from the irradiation window 12a side. A concave portion 85 c that engages with the convex portion 82 a of the engaging claw 82 is provided on the bottom portion 85 b of the insertion / extraction portion 85.

  The engaging groove 86 extends in the circumferential direction from the bottom 85 b of the insertion / extraction portion 85. The height of the engaging groove 86 is slightly higher than the thickness of the engaging claw 82. The engaging groove 86 is provided with a concave portion 86 c that engages with the convex portion 82 a of the engaging claw 82.

  When attaching the filter 80, the engaging claws 82 are inserted into the insertion / extraction portions 85 of the filter attachment portions 21f, and the filter 80 is inserted into the holding frame 21. Each engagement claw 82 is pressed against the bottom 85b of each insertion / extraction portion 85, and the filter 80 is rotated around the optical axis. Each engaging claw 82 is inserted into each engaging groove 86, and each convex part 82a and each concave part 86c are engaged. As a result, as shown in FIG. 17B, the engagement of each engagement claw 82 and each engagement groove 86 restricts the filter 80 from coming off in the optical axis direction, and each projection 82 a The rotation around the optical axis of the filter 80 is restricted by the engagement with each recess 86c, and the filter 80 is held by each filter attachment portion 21f.

  When removing the filter 80, the filter 80 is rotated in the direction opposite to that at the time of attachment, and each engagement claw 82 is pulled out from each engagement groove 86, and each engagement claw 82 is moved from each insertion / extraction portion 85 to the irradiation window 12a side. Pull out.

  As described above, in the lighting fixture 10, the filter 80 can be easily attached to and detached from the holding frame 21 by a simple operation of simply rotating the filter 80 around the optical axis. Further, the filter 80 can be appropriately held by each filter mounting portion 21f by the engagement between each engagement claw 82 and each engagement groove 86 and the engagement between each projection 82a and each recess 86c. . Contrary to the above, the engaging claw 82 may be provided with a concave portion, and the insertion / extraction portion 85 and the engaging groove 86 may be provided with a convex portion. Further, the shape of the convex portion is not limited to a hemispherical shape, and may be any shape that allows engagement.

  In a lighting fixture, when a radiator is attached with an attachment member such as a screw, a dimensional error between components is absorbed by providing a circular through hole having a diameter larger than the diameter of the screw in the radiator. Yes. In addition, lighting fixtures are being increased in output and size for large-scale stores. However, when the lighting fixture is increased in size, the dimensional error between components also increases. For this reason, it is becoming difficult to attach a heat radiator appropriately in a circular through-hole.

  For example, when the diameter of the through hole is small with respect to the dimensional error, the dimensional error cannot be appropriately absorbed. If the error cannot be properly absorbed, for example, when the heat radiator is attached to the holding frame, the holding frame may be distorted, and a gap may be generated between the heat radiator and the holding frame. When a gap is generated between the radiator and the holding frame, for example, light leaks from the gap, and light is irradiated to an unintended portion. Moreover, the beauty | look of a lighting fixture will be spoiled.

  On the other hand, if the diameter of the through hole is made sufficiently large with respect to the dimensional error, for example, the contact area between the screw head and the radiator is reduced, and the holding of the radiator becomes unstable.

  Moreover, in the lighting fixture, cost reduction is advanced and it is desired to hold | maintain a heat radiator appropriately with a smaller number of attachment members. Specifically, it is desired that the number of attachment members be two or less.

  In the lighting fixture 10 according to the present embodiment, the radiator 20 is provided with a first through hole 101 having a long hole extending in the first direction ED1 and a second through hole 102 having a long hole extending in the second direction ED2. ing. In the luminaire 10, dimensional errors in the direction along the first direction ED <b> 1 of the radiator 20 and the holding frame 21 can be absorbed by the first through hole 101. The dimensional error in the direction along the second direction ED <b> 2 of the radiator 20 and the holding frame 21 can be absorbed by the second through hole 102. That is, in the lighting fixture 10, the positioning of the radiator 20 and the holding frame 21 can be performed two-dimensionally by the first through hole 101 and the second through hole 102.

  Therefore, in the luminaire 10, even when the dimensional error becomes large, by adjusting the length of the first through hole 101 in the first direction ED1 and the length of the second through hole 102 in the second direction ED2. The dimensional error of the heat radiator 20 and the holding frame 21 can be appropriately absorbed. The length of the first through hole 101 in the first direction ED1 and the length of the second through hole 102 in the second direction ED2 are appropriately determined according to, for example, the dimensional error of the radiator 20 and the holding frame 21. Just decide.

  Moreover, in the lighting fixture 10, in the direction perpendicular | vertical with respect to 1st direction ED1 and the direction perpendicular | vertical with respect to 2nd direction ED2, sufficient contact area of the heat radiator 20 and the head 120b of the attachment member 120 is provided. Can be secured. Therefore, in the lighting fixture 10, the radiator 20 can be stably held by the holding frame 21. Thus, in the lighting fixture 10, the radiator 20 can be appropriately attached to the holding frame 21 even with the two attachment members 120.

FIG. 18 is a schematic cross-sectional view illustrating a modified example of the radiator and the holding frame according to the embodiment.
As shown in FIG. 18, in this example, the facing surface 20t is inclined with respect to the optical axis OA. And the direction which the 1st through-hole 101 and the 2nd through-hole 102 penetrate is inclined with respect to the opposing surface 20t. Thus, the opposing surface 20t may be an arbitrary surface that intersects the optical axis OA. The direction through which the first through hole 101 and the second through hole 102 penetrate may be any direction that intersects the facing surface 20t.

  In the above embodiment, the first through hole 101 and the second through hole 102 are provided in the radiator 20, and the first holding unit 111 and the second holding unit 112 are provided in the holding frame 21. On the other hand, the first holding part 111 and the second holding part 112 may be provided in the radiator 20, and the first through hole 101 and the second through hole 102 may be provided in the holding frame 21.

  In the above embodiment, a screw is shown as the attachment member 120, but the attachment member 120 may be an arbitrary member that can attach the radiator 20 to the holding frame 21 such as a rivet, for example. The 1st holding | maintenance part 111 and the 2nd holding | maintenance part 112 are not restricted to a screw hole, The arbitrary structures corresponding to the attachment member 120 may be sufficient. Further, instead of the first holding part 111 and the second holding part 112, a through-hole is provided, and the radiator 20 and the holding frame 21 are composed of a bolt penetrating the radiator 20 and the holding frame 21 and a nut attached to the bolt. The radiator 20 may be attached to the holding frame 21 by tightening together.

  However, as described above, the first through hole 101 and the second through hole 102 are provided in the radiator 20, and the first holding part 111 and the second holding part 112 are provided in the holding frame 21. It can suppress that 120 is exposed to the irradiation window 12a side (indoor side). For example, a decrease in the aesthetic appearance of the lighting fixture 10 can be suppressed.

  In the said embodiment, although the 1st through-hole 101 and the 2nd through-hole 102 are used for the attachment to the holding frame 21 of the heat radiator 20, the structure of the 1st through-hole 101 and the 2nd through-hole 102 is a lighting fixture. You may apply to attachment of 10 other components.

  In the support part 14 which concerns on the said embodiment, the illumination main body 12 is supported rotatably in 1st rotation direction RD1 and 2nd rotation direction RD2. The support portion may support the illumination main body so as to be rotatable only in the first rotation direction RD1. The support portion may support the illumination main body so as to be rotatable only in the second rotation direction RD2. In this case, for example, the first frame body may support the illumination main body in a state where the optical axis OA of the irradiation light is inclined with respect to the first central axis CA1 (second position state). Moreover, in the said embodiment, although the universal type lighting fixture 10 which can change the irradiation direction of irradiation light is shown, the irradiation direction of irradiation light may be fixed.

  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.

  DESCRIPTION OF SYMBOLS 10 ... Lighting fixture, 12 ... Illuminating body, 12a ... Irradiation window, 14 ... Support part, 20 ... Radiator, 20t ... Opposite surface, 21 ... Holding frame (holding body), 21f ... Filter attaching part, 22 ... Substrate, 23 ... lens unit, 25 ... light source, 26 ... lens, 27 ... hinge part, 28a, 28b ... shaft, 29 ... heat dissipation sheet, 31-37 ... heat dissipation fin, 38 ... continuous part, 41 ... first frame, 42 ... first Two frame bodies, 43 ... retaining member, 44 ... anti-rotation member, 45 ... screw, 51, 52 ... bearing portion, 60 ... flange portion, 61 ... spring mounting portion, 62 ... rib, 63 ... torsion spring, 66 ... rotation Stop mounting portion, 67, 68 ... projection, 80 ... filter, 81 ... filter body, 82 ... engagement claw, 85 ... insertion / extraction portion, 86 ... engagement groove, 101 ... first through hole, 102 ... second through hole, 111: first holding unit, 112: second holding unit Department, 120 ... mounting member

Claims (4)

A radiator that is in thermal contact with the light source;
A holding body for holding the heat radiating body;
With
One of the radiator and the holding body is
A facing surface facing the other of the heat radiating body and the holding body;
Two first and second through holes penetrating in a direction intersecting the facing surface;
Have
The length of the first direction perpendicular to the direction intersecting the facing surface of the first through hole is different from each of the direction intersecting the facing surface of the first through hole and the first direction. Longer than the vertical length in the second direction,
The length of the second through hole in the second direction is longer than the length of the second through hole in the first direction.   A line segment connecting the center of the first through hole and the one center of the heat dissipating body and the holding body when projected onto a plane perpendicular to the direction intersecting the facing surface; The lighting fixture according to claim 1, wherein an angle formed by a line connecting the center of the through hole and the one center of the heat radiating body and the holding body is 170 ° or more and 180 ° or less. Each of the first through hole and the second through hole is inserted with a part of an attachment member for attaching the heat radiating body to the holding body,
The other of the radiator and the holding body is
A first holding portion that is disposed at a position facing the first through hole and holds the part of the attachment member that is inserted through the first through hole;
A second holding portion that is disposed at a position facing the second through hole and holds the part of the attachment member that is inserted through the second through hole;
The lighting fixture according to claim 1 or 2, wherein: The first through hole and the second through hole are provided in the radiator,
The lighting device according to claim 3, wherein the first holding unit and the second holding unit are provided on the holding body.

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