JP2014130757A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture enabling efficient light irradiation.SOLUTION: The lighting fixture includes a lighting body and a support part. The lighting body includes an irradiation window emitting light, and a radiator body set on a side opposite to the irradiation window. The support part has a cylindrical first frame and supports the lighting body freely rotatably about a rotational axis while passed through the first frame. The rotational axis is apart from the center axis in a second direction perpendicular to the center axis and a first direction perpendicular to the center axis and extends in the first direction. The support part makes the lighting body movable to a first position where the light axis of light and the center axis are parallel to each other, and to a second position where the light axis is slanted based on the center axis and part of the radiator body and the irradiation window are projected to the outside of the first frame from one end of the first frame.

Description

  Embodiments described herein relate generally to a lighting fixture.

  There is a universal type lighting fixture. The universal type lighting fixture can arbitrarily select, for example, a state in which the vertical direction perpendicular to the mounting surface such as the ceiling and the optical axis are parallel, and a state in which the optical axis is inclined with respect to the vertical direction. . That is, in the universal type lighting fixture, the light irradiation direction can be changed. In such a lighting fixture, when the optical axis is inclined, a part of the irradiation light may be blocked by the fixture itself or a ceiling board.

International Publication No. 2012/026420

  Embodiment of this invention provides the lighting fixture which can irradiate light more efficiently.

  According to the embodiment of the present invention, a lighting fixture including a lighting main body and a support portion is provided. The said illumination main body has the irradiation window which radiate | emits light, and the heat radiator provided in the opposite side to the said irradiation window. The support portion includes a cylindrical first frame body, and supports the illumination body so as to be rotatable about a rotation axis in a state of being inserted through the first frame body. The rotating shaft extends in the first direction and is separated from the central axis in a second direction perpendicular to the central axis and a first direction perpendicular to the central axis. The support portion has a first position in which the optical axis of the light and the central axis are parallel, and the optical axis is inclined with respect to the central axis so that a part of the radiator and the irradiation window are in the first position. The illumination main body is movable to a second position that protrudes from one end of the frame body to the outside of the first frame body. The heat radiator extends in a direction parallel to the optical axis, extends in a direction perpendicular to the rotation axis, and is arranged in a direction parallel to the rotation axis, and the heat dissipation body And a continuous part in which a part of each of the plurality of radiating fins is made continuous.

  A lighting fixture capable of efficiently irradiating light is provided.

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 perspective view showing the filter concerning an embodiment. FIG. 14A and FIG. 14B are schematic perspective views showing the holding frame according to the embodiment.

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. 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.

  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 a first direction perpendicular to the first central axis CA1 of the first frame body 41. The rotation axis RA is separated from the first central axis CA1 in a second direction perpendicular to the first central axis CA1 and the first 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 first direction is the X-axis direction, and the second direction is the 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”.

  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. 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 rotation stop member 44 is attached to the rotation stop attachment portion 66 by a screw 45 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 long hole 44h is formed so that the protrusions 67 and 68 can be inserted therethrough.

  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.

  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 plurality of light sources 25 are, for example, arranged concentrically. A wiring (not shown) is connected to the substrate 22, and power is supplied 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 a heat radiating sheet etc., for example. As a result, the substrate 22 is held by the radiator 20. For example, 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.

  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 perspective view illustrating a filter according to the embodiment.
FIG. 13 shows a filter 80 that is detachably attached to the illumination body 12.
As shown in FIG. 13, 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. 14A and FIG. 14B are schematic perspective views showing the holding frame according to the embodiment. As shown in FIG. 14A and FIG. 14B, 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. 14B, 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 the lighting fixture 10 according to the present embodiment, when the lighting body 12 is positioned at the second position, the irradiation window 12a protrudes from the one end 41a of the first frame 41 to the outside of the first frame 41, and the fixture itself. It is possible to prevent the irradiation light from being blocked by an attachment target such as a ceiling plate or the like. Thereby, in the lighting fixture 10 which concerns on this embodiment, light can be irradiated to a target object more efficiently. In addition, for example, it is possible to suppress a part of the irradiation light from being reflected on the lower surface of the flange portion 60 and the like and diffusing the irradiation light in an undesired direction.

  Moreover, in the lighting fixture 10, the 1st frame 41 is made into the vertically long cylinder 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.

  In the support portion 14 according to the present embodiment, the illumination main body 12 is supported so as to be rotatable in the first rotation direction RD1 and the second rotation direction RD2. The support unit 14 may support the illumination main body 12 so as to be rotatable only in the first rotation direction RD1. In this case, for example, a flange portion may be provided in the first frame body 41 and the first frame body 41 may be used as a decorative frame.

  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 ... Illumination main body, 12a ... Irradiation window, 14 ... Support part, 20 ... Radiator, 21 ... Holding frame, 21f ... Filter attachment part, 22 ... Substrate, 23 ... Lens unit, 25 ... Light source, 26 ... Lens, 27 ... Hinge, 28a, 28b ... Shaft, 31-37 ... Radiation fin, 38 ... Continuous part, 41 ... First frame, 42 ... Second frame, 43 ... Retaining member, 44 ... Anti-rotation 45, screw, 51, 52 ... bearing portion, 60 ... flange portion, 61 ... spring mounting portion, 62 ... rib, 63 ... torsion spring, 66 ... anti-rotation mounting portion, 67, 68 ... projection, 80 ... filter, 81 ... Filter body, 82 ... Engaging claw, 85 ... Insertion / extraction part, 86 ... Engaging groove

Claims (4)

An illumination main body having an irradiation window for emitting light, and a radiator provided on the opposite side of the irradiation window;
A support portion that has a cylindrical first frame and supports the illumination body in a state of being inserted through the first frame so as to be rotatable around a rotation axis;
With
The rotation axis is spaced apart from the central axis in a second direction perpendicular to the central axis and a first direction perpendicular to the central axis, and extends in the first direction;
The support portion has a first position in which the optical axis of the light and the central axis are parallel, and the optical axis is inclined with respect to the central axis so that a part of the radiator and the irradiation window are in the first position. The illumination main body is movable to a second position protruding from the one end of the frame body to the outside of the first frame body,
The radiator is
A plurality of radiating fins extending in a direction parallel to the optical axis and extending in a direction perpendicular to the rotation axis and arranged in a direction parallel to the rotation axis;
A continuous part in which a part of each of the plurality of heat dissipating fins is made continuous in the part of the heat radiator;
A lighting fixture having. The support portion further includes a cylindrical second frame body through which the first frame body can be inserted,
The lighting apparatus according to claim 1, wherein the second frame supports the inserted first frame so as to be rotatable about a central axis of the second frame. Each end of the plurality of heat dissipating fins protrudes from the other end of the first frame body to the outside of the first frame body and the second frame body,
The length of each of the plurality of radiating fins along the optical axis decreases in a direction perpendicular to the rotational axis and from the rotational axis toward the optical axis,
Each of the plurality of radiating fins includes the second radiating fin in the direction perpendicular to the central axis of the second frame body, regardless of whether the illumination body is located at the first position or the second position. The lighting fixture according to claim 2, wherein the lighting fixture is positioned on an inner side than an outer surface of the frame.   4. The luminaire according to claim 3, wherein each of the plurality of radiating fins does not contact the first frame when the illumination main body is located at the second position.

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