lighting fixtures

Abstract

To provide a lighting apparatus capable of holding a lighting fixture in a tiltable and rotatable state with a simple structure.SOLUTION: A lighting appliance comprises a lighting fixture which emits irradiation light and a frame member which supports the lighting fixture, the frame member comprises a cylindrical frame body which is arranged with the light fixture on a center axis, and an annular movable frame which is arranged on a lighting fixture-side mount surface of the frame body in the axial direction of the center axis, and the movable frame has an annular plate-like annular flat plate part which is fixed on the mount surface rotatably in a circumferential direction of the frame body, and a pair of holding piece which are plate-like pieces extending from an inner peripheral edge of the annular flat plate part toward the lighting fixture, and hold the lighting fixture therebetween in a vertical direction perpendicular to the irradiation direction of the lighting fixture. The holding pieces each have a lighting fixture holding part which supports the lighting fixture rotatably on the vertical direction as an axis of rotation to support the lighting fixture tiltably to the center axis of the frame member.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a lighting fixture that is attached to a mounting portion such as a ceiling. [Background technology]

[0002] Conventionally, lighting fixtures that are inserted into recessed holes formed in a mounting portion such as a ceiling have been known. For example, the lighting fixture disclosed in Patent Document 1 includes a lighting fixture that emits light, a frame member that supports the lighting fixture, a mounting spring that is attached to the outer surface of the frame member and protrudes outward, and a lighting device that supplies power to a light source unit of the lighting fixture. The frame member includes a cylindrical movable frame that holds the lighting fixture rotatably around a rotation axis perpendicular to the direction of illumination, and a cylindrical frame body that holds the movable frame rotatably in a circumferential direction.

[0003] The movable frame (see Figure 11 described later) is made of sheet metal and has a cylindrical portion and an annular flange portion that protrudes radially outward along the edge of the opening on the illumination side of the cylindrical portion. The cylindrical portion has a pair of cut-and-raised portions cut into a mountain shape on the inside, and is connected to the lamp by passing a connecting member through holes provided in the pair of cut-and-raised portions and fixing it to the lamp. The flange portion is fixed to the frame body so as to be rotatable in the circumferential direction.

[0004] As described above, by connecting the lamp to the pair of cut-and-raised portions of the movable frame with the connecting member, the lamp can rotate freely around a rotation axis perpendicular to the direction of light emission and can move the direction of light emission linearly by tilting with respect to the central axis of the frame. Furthermore, by fixing the flange portion of the movable frame to the frame so as to be rotatable in the circumferential direction, the lamp connected to the movable frame can rotate freely in the circumferential direction and can move the direction of light emission in an arc. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2020-119698 Summary of the Invention [Problem to be solved by the invention]

[0006] The movable frame of the lighting fixture in Patent Document 1 has a shape based on a cylindrical portion, to which a flange portion is added to allow the lighting fixture to rotate freely in the circumferential direction. The movable frame of the lighting fixture in Patent Document 1 has a structure formed of two portions, the cylindrical portion and the flange portion, and although it appears to have a simple structure at first glance, forming the flange portion requires drawing, which complicates the manufacturing process, and therefore there is a demand for further simplification of the structure.

[0007] Furthermore, the raised portion on the cylindrical portion is necessary to connect the movable frame and the lamp and to allow the lamp to be tilted freely, but forming this raised portion is also cumbersome. Therefore, there is a need for a simpler structure that does not require a raised portion on the movable frame.

[0008] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a lighting device with a simple structure that can hold a lamp in a tiltable and rotatable manner. [Means for solving the problem]

[0009] The lighting fixture according to the present disclosure comprises a lamp that emits light and a frame member that supports the lamp, the frame member comprising a cylindrical frame body arranged so that the lamp is positioned on its central axis, and an annular movable frame arranged on the mounting surface of the frame body on the lamp fixture side in the axial direction of the central axis, the movable frame having an annular, plate-shaped annular flat plate portion fixed to the mounting surface so as to be rotatable in the circumferential direction of the frame body, and a pair of holding pieces that are plate-like pieces extending from the inner peripheral edge of the annular flat plate portion toward the lamp fixture and are formed so as to sandwich the lamp fixture in a vertical direction perpendicular to the irradiation direction of the lamp fixture, the holding pieces having lamp fixture holding portions that support the lamp fixture rotatably around a rotation axis in the vertical direction, thereby supporting the lamp fixture so as to be tiltable with respect to the central axis of the frame member. The holding piece has a first surface extending from the inner peripheral edge of the annular flat plate portion toward the lamp fixture, and a second surface which is a flat surface extending from the extending end of the first surface toward the radially outer side of the annular flat plate portion and which constitutes an inclination stopper portion that restricts the inclination range of the lamp fixture. This is what we do. [Effects of the Invention]

[0010] According to the lighting fixture of the present disclosure, the movable frame includes an annular, plate-shaped annular flat plate portion. The annular flat plate portion is fixed to the mounting surface of the frame body so as to be rotatable in the circumferential direction, and the annular flat plate portion allows the lamp fixture to be rotated in the circumferential direction. The movable frame also has a pair of plate-like retaining pieces extending from the inner peripheral edge of the annular flat plate portion toward the lamp fixture, and is formed so as to sandwich the lamp fixture in a vertical direction perpendicular to the direction of illumination of the lamp fixture. The lamp fixture retaining portions of the pair of retaining pieces support the lamp fixture so as to be rotatable around the vertical direction as a rotation axis, and the lamp fixture retaining portions allow the lamp fixture to tilt freely relative to the central axis of the frame member. The movable frame is configured based on the annular flat plate portion, and despite its simple structure of adding a pair of plate-like retaining pieces to the annular flat plate portion, it is able to hold the lamp fixture so as to be rotatable and tiltable. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view of a lighting fixture according to an embodiment. [Figure 2] FIG. 2 is a front view of a lamp and a frame member of the lighting fixture according to the embodiment. [Figure 3] FIG. 2 is a perspective view of a lamp and a frame member of the lighting fixture according to the embodiment. [Figure 4] FIG. 2 is a partially exploded perspective view of a lamp and a frame member of the lighting fixture according to the embodiment. [Figure 5] FIG. 2 is an exploded perspective view of a light source unit of a lighting fixture of the lighting apparatus according to the embodiment. [Figure 6] FIG. 2 is a perspective view of a movable frame of the lighting fixture according to the embodiment. [Figure 7] FIG. 2 is a side view of a movable frame of the lighting fixture according to the embodiment. [Figure 8] FIG. 2 is a front view of a movable frame of the lighting fixture according to the embodiment. [Figure 9] 10A and 10B are diagrams illustrating a state in which a lamp of the lighting fixture according to the embodiment is tilted in one direction. [Figure 10] 10A and 10B are diagrams illustrating a state in which the lamp of the lighting fixture according to the embodiment is tilted in a direction opposite to the one direction. [Figure 11] FIG. 10 is a perspective view of a movable frame of a conventional lighting fixture. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each drawing, identical or corresponding parts are designated by the same reference numerals, and their description will be omitted or simplified as appropriate. Furthermore, the shape, size, and arrangement of the configurations shown in each drawing may be changed as appropriate within the scope of the present disclosure.

[0013] Embodiment Fig. 1 is a perspective view of a lighting fixture 100 according to an embodiment. Fig. 2 is a front view of a lighting fixture 1 and a frame member 2 of the lighting fixture 100 according to an embodiment. Fig. 3 is a perspective view of the lighting fixture 1 and the frame member 2 of the lighting fixture 100 according to an embodiment. Fig. 4 is a partially exploded perspective view of the lighting fixture 1 and the frame member 2 of the lighting fixture 100 according to an embodiment. Fig. 5 is an exploded perspective view of a light source unit 11 of the lighting fixture 1 of the lighting fixture 100 according to an embodiment.

[0014] 1 to 5 is a downlight or universal downlight that is inserted into a recessed hole 110 (see FIG. 2) formed in a mounting portion such as a ceiling. As shown in FIG. 1, this lighting fixture 100 has a lighting fixture 1 that emits light, a frame member 2 that is mounted in the recessed hole 110 in a mounting portion such as a ceiling and that holds the lighting fixture 1, a lighting device 3, and wiring 4.

[0015] [Lighting 1] The lighting fixture 1 emits light, for example, toward a room. Here, a vertical direction perpendicular to the direction of light emission from a light source unit 11, which will be described later, is defined as a rotation axis A. The lighting fixture 1 is rotatably held by the frame member 2 so that it can rotate relative to the frame member 2 within a predetermined range of angles around the rotation axis A. Hereinafter, the rotation of the lighting fixture 1 around the rotation axis A is considered to be an inclination with respect to the central axis B of the frame member 2, and is sometimes referred to as "inclination."

[0016] The frame member 2, which will be described later, is formed in a cylindrical shape, and the lamp 1 is rotatably held by the frame member 2 so as to rotate around a central axis B of the frame member 2 in a circumferential direction CD.

[0017] As shown in FIGS. 2 and 3, the lighting fixture 1 includes a light source unit 11, a heat sink 12, and an arm portion 13.

[0018] (Light source unit 11) The light source unit 11 is a part that emits and irradiates light in the lighting fixture 1. The light source unit 11 has a light source module 111, a lens 112, a lens holder 112a, a light source holder 113, and a closure plate 114, as shown in FIG.

[0019] The light source module 111 constitutes the part of the light source unit 11 that emits light. The light source module 111 has a light emitting substrate 111a and a socket 111b. The light emitting substrate 111a is a substrate on which a light emitting element is mounted. The light emitting element is, for example, a COB (Chip On Board)-LED. The socket 111b mechanically holds the light emitting substrate 111a and electrically connects the light emitting substrate 111a to the lighting device 3. The light source module 111 is arranged inside the light source holder 113.

[0020] The lens 112 controls the light distribution so that the light emitted from the light emitting substrate 111a of the light source module 111 is irradiated in a target direction. The lens 112 is disposed inside the light source holder 113. The lens 112 covers the light emitting element of the light source module 111 and is disposed on the optical axis of the light source module 111.

[0021] As shown in Fig. 5, the lens holder 112a is configured in a cylindrical shape that expands toward the irradiation side, and covers and holds the lens 112 disposed inside. In Fig. 5, the lens holder 112a is shown as being divided in the direction of the main axis, but it may also be configured as not being divided.

[0022] The light source holder 113 constitutes the housing of the light source unit 11. The light source holder 113 is formed in a cylindrical shape with a diameter that decreases toward the irradiation side. In the light source holder 113, an opening on the opposite side to the irradiation side is closed by a closure plate 114. Note that the closure plate 114 may be formed integrally with the light source holder 113, in which case the light source holder 113 is formed in a cylindrical shape with a bottom. The light source holder 113 covers the periphery of the lens holder 112a that houses the light source module 111 and the lens 112 therein, and holds them inside.

[0023] Inside the light source holder 113, the light source module 111 is attached to the closure plate 114. Outside the light source holder 113, the heat sink 12 is attached to the closure plate 114. The light source module 111 and the heat sink 12 are provided on opposite sides of the closure plate 114, and are arranged back-to-back with the closure plate 114 in between.

[0024] In the light source unit 11 , the central axis of the light source unit 11 becomes the axis of light emitted from the light emitting substrate 111 a of the light source module 111 , and also becomes the optical axis of the lighting fixture 1 .

[0025] (heat sink 12) 2 to 4, the heat sink 12 has a disk-shaped base member 120 and a box-shaped heat sink main body 121 provided on the upper surface of the base member 120. The heat sink 12 dissipates heat transferred from the light source module 111 via the closure plate 114 from the base member 120 and the heat sink main body 121 into the air.

[0026] The heat sink 12 is made of a metal with high thermal conductivity, such as an aluminum alloy. The heat sink 12 is detachably attached to the upper surface of the closure plate 114 via a base member 120. The heat sink main body 121 is configured in a box shape having an upper surface, a lower surface (not shown), and four side surfaces, and the four side surfaces act as fins that dissipate heat generated from the light source module 111.

[0027] The heat sink main body 121 is not limited to being box-shaped, and may be composed of a plurality of fins provided on the upper surface of the base member 120. The heat sink main body 121 may have any shape as long as it is configured to be able to dissipate heat generated from the light source module 111.

[0028] (Arm part 13) The arm portion 13 connects the lamp 1 and the frame member 2. The arm portion 13 is formed in the shape of a long plate. One longitudinal end of the arm portion 13 is fixed to the heat sink 12 of the lamp 1 by a fixing member 40 such as a screw, and the other end is rotatably connected to a holding piece 212 of a movable frame 21 (described later) of the frame member 2 by a connecting member 41. A pair of arm portions 13 are provided with the heat sink 12 sandwiched between them. The pair of arm portions 13 are arranged overlapping each other on the outside of the pair of holding pieces 212. Specifically, the arm portion 13 and the holding piece 212 are connected by passing a connecting member 41 through a through hole 13c provided in the arm portion 13 overlapping the holding piece 212 and screwing it into a connecting hole portion 212a1 (described later) of the holding piece 212.

[0029] [Frame member 2] The frame member 2 is attached to a mounting portion such as a ceiling. The frame member 2 is used to secure the lighting fixture 100 to the mounting portion. The frame member 2 holds the lighting fixture 1 rotatably around a rotation axis A that is perpendicular to the direction of light irradiation by the light source unit 11. The frame member 2 is formed in a cylindrical shape, and holds the lighting fixture 1 rotatably in a circumferential direction CD around a central axis B of the frame member 2.

[0030] As shown in FIG. 4, the frame member 2 has a cylindrical frame body 20, an annular movable frame 21, an attachment spring 23, and a frame fixing member 24.

[0031] (Frame 20) The frame 20 is disposed so that the lamp 1 is positioned on the central axis B. In other words, the frame 20 and the lamp 1 are disposed in a positional relationship where they are lined up on the central axis B. The frame 20 has a cylindrical side wall 201, three support plate fixing portions 202 formed at intervals in the circumferential direction on the outer peripheral surface of the side wall 201, and an annular flange portion 203 that protrudes radially outward along the edge of the opening on the illumination side of the side wall 201. A mounting surface 2011, which is the end surface (hereinafter referred to as the top surface) of the side wall 201 on the lamp 1 side, is flat and annular, and is the portion on which the movable frame 21 is mounted. The support plate fixing portions 202 protrude radially outward from the outer peripheral surface of the side wall 201 and are formed to extend in the axial direction. The mounting surface 2021, which is the upper surface of the support plate fixing portion 202, is located at a height position higher than the mounting surface 2011 of the side wall portion 201, and is configured to be flush with the upper surface of the annular flat plate portion 211 described below when the annular flat plate portion 211 of the movable frame 21 is placed on the side wall portion 201.

[0032] A screw hole 202a and two protrusions 202b are formed in the support plate fixing portion 202. The screw hole 202a is formed in the circumferential center of the upper surface of the support plate fixing portion 202. The two protrusions 202b are formed at both ends of the support plate fixing portion 202 in the circumferential direction.

[0033] An attachment groove 20c into which one end of the attachment spring 23 is fitted and fixed is formed on the outer surface of the side wall portion 201. Three attachment grooves 20c are formed at intervals in the circumferential direction.

[0034] The flange portion 203 is formed in an annular plate shape. The flange portion 203 protrudes radially outward along the edge of the lower opening of the side wall portion 201. The flange portion 203 abuts against the lower surface of the mounting portion, such as a ceiling, when the lighting fixture 1 is inserted into the recessed hole 110, and covers the edge of the recessed hole 110.

[0035] (Movable frame 21) The movable frame 21 is made of a single sheet of metal. As shown in Fig. 2, the movable frame 21 has an annular, plate-shaped annular flat plate portion 211, holding pieces 212 extending upward from the inner peripheral edge of the annular flat plate portion 211, and anti-rotation portions 213 that restrict the rotation range of the movable frame 21 in the circumferential direction CD. The central axis of the annular flat plate portion 211 coincides with the central axis B. The movable frame 21 is disposed on a mounting surface 2011, which is the end face of the frame body 20 on the lamp fixture 1 side in the axial direction of the central axis B.

[0036] The movable frame 21 is fixed to a mounting surface 2011 of a cylindrical side wall portion 201 of the frame body 20 by a frame fixing member 24 so as to be rotatable in the circumferential direction CD. Specifically, the frame fixing member 24 is fixed to a support plate fixing portion 202 of the frame body 20 in a state where the annular flat plate portion 211 of the movable frame 21 is sandwiched between the mounting surface 2011 of the side wall portion 201 and a movable frame support plate 241 (described below) of the frame fixing member 24. With this configuration, the movable frame 21 is held by the frame body 20 so as to be rotatable in the circumferential direction CD around the central axis B.

[0037] The holding piece 212 is a part that holds the lamp 1 so that it can rotate freely around the rotation axis A. A pair of holding pieces 212 are provided at an interval in the circumferential direction CD on the annular flat plate portion 211. The pair of holding pieces 212 are provided so as to face each other with the lamp 1 therebetween in a vertical direction perpendicular to the irradiation direction of the lamp 1.

[0038] The holding piece 212 has a connecting hole portion 212a1 that forms a screw hole. The connecting hole portion 212a1 is provided to connect the movable frame 21 to the arm portion 13 with a connecting member 41 such as a screw when attaching the movable frame 21 to the arm portion 13. The two connecting hole portions 212a1 are provided opposite each other so that the axis centers of the holes are positioned on the same line, as shown by the dashed dotted line in FIG. 4. With this configuration, the lamp fixture 1 fixed to the arm portion 13 is held by the holding piece 212 so as to be rotatable around the connecting member 41 fastened to the two connecting hole portions 212a1 as the rotation axis A.

[0039] The anti-rotation portion 213 is composed of a protruding piece that protrudes upward, toward the lamp fixture, from the inner peripheral edge of the annular flat plate portion 211 of the movable frame 21. The anti-rotation portion 213 is provided to prevent twisting of the wiring 4 (see FIG. 1) when the lamp fixture 1 is rotated in the circumferential direction CD to change the illumination direction. As shown in FIG. 3, the anti-rotation portion 213 abuts against a stopper portion 241c of a movable frame support plate 241 (described later) of the frame fixing member 24 when the movable frame 21 rotates in the circumferential direction CD, thereby restricting the rotation range of the movable frame 21 in the circumferential direction CD. The anti-rotation portion 213 and the stopper portion 241c of the movable frame support plate 241 (described later) of the frame fixing member 24 form an anti-rotation mechanism 50 that restricts the rotation range of the movable frame 21 in the circumferential direction CD.

[0040] The lighting fixture 100 can move the light emission direction linearly by rotating the lamp 1 relative to the frame member 2 about a rotation axis A via the arm portion 13. The lighting fixture 100 can also move the light emission direction arcuately by rotating the movable frame 21 relative to the frame body 20 about a central axis B. By moving the light emission direction on these two axes, the lighting fixture 100 can emit light in any direction.

[0041] (Mounting spring 23) As shown in FIGS. 2 to 5, the mounting springs 23 are made of an elastic material such as stainless steel, and are leaf springs formed by bending a strip-shaped plate material. The base ends of the mounting springs 23 are attached to the mounting grooves 20c of the frame body 20, and protrude radially outward from the frame body 20. When the lighting fixture 100 is viewed from the side, the mounting springs 23 have an arched shape that is convex upward. In the illustrated example, three mounting springs 23 are attached to the frame body 20 at intervals around the circumference. Note that the number of mounting springs 23 is not limited to three, and may be more or less than three depending on, for example, the size of the lighting fixture 100.

[0042] Before the lighting fixture 100 is attached to the recessed hole 110, the outer ends of the mounting springs 23 hang down, and are turned upward by an external force before the lighting fixture 100 is recessed in the recessed hole 110. When the lighting fixture 100 is recessed in the recessed hole 110 with the outer ends of the mounting springs 23 facing upward, the outer ends of the mounting springs 23 are pressed against the inner circumferential surface of the recessed hole 110, and the lighting fixture 100 is fixed to the ceiling. Furthermore, when the lighting fixture 100 is recessed in the recessed hole 110, the elastic force of the mounting springs 23 pushes the lighting fixture 100 upward, and the flange portion 203 of the frame member 2 is pressed against the edge of the recessed hole 110, thereby fixing the lighting fixture 100 to the ceiling.

[0043] (Frame fixing member 24) The frame fixing member 24 has an arc-shaped, plate-like movable frame support plate 241 and fixing members 242 such as screws. The movable frame support plate 241 has a notch 241a formed in the circumferential center of the outer periphery of the movable frame support plate 241, and positioning holes 241b formed on both circumferential sides of the notch 241a. The movable frame support plate 241 is positioned by inserting two protrusions 202b of the support plate fixing portion 202 into the two positioning holes 241b, as shown in FIG. 3 . Then, in this state, the shaft portion of the fixing member 242 passes through the notch 241a and is screwed into the screw hole 202a of the support plate fixing portion 202, thereby fixing the movable frame support plate 241 to the support plate fixing portion 202.

[0044] When the movable frame support plate 241 is fixed to the support plate fixing portion 202, the arc-shaped inner peripheral edge portion 2411 of the movable frame support plate 241 overlaps the upper surface of the annular flat plate portion 211 of the movable frame 21. In this way, a portion of the movable frame support plate 241 overlaps the upper surface of the annular flat plate portion 211 of the movable frame 21, thereby sandwiching the annular flat plate portion 211 between the movable frame support plate 241 and the mounting surface 2011 of the side wall portion 201. With the above configuration, the movable frame 21 is held by the frame body 20 so as to be rotatable in the circumferential direction CD.

[0045] Three movable frame support plates 241 and three fixed members 242 are provided at intervals in the circumferential direction CD. One of the three movable frame support plates 241 is formed with a stopper portion 241c that protrudes radially inward from an inner peripheral edge portion 2411, and when the movable frame 21 rotates in the circumferential direction CD, the anti-rotation portion 213 comes into contact with the stopper portion 241c to prevent the movable frame 21 from rotating.

[0046] [Lighting device 3, wiring 4] The lighting device 3 supplies power from an external power source to the light source module 111 of the lighting fixture 1 to light the light source module 111, and is placed in an attic space or the like. The lighting device 3 is connected to the light emitting substrate 111a of the light source module 111 via a wiring 4. Specifically, an end of the wiring 4 drawn into the heat sink 12 is connected to one end of a cable (not shown). The other end of the cable is connected to the light emitting substrate 111a through through holes formed in the base member 120 and the closure plate 114 of the heat sink 12. This electrically connects the lighting device 3 and the light emitting substrate 111a.

[0047] [Detailed configuration of movable frame 21] The movable frame 21 is made of a single sheet metal, and although it has a simple structure, it has the following four functions: (1) rotation about the rotation axis A, (2) tilt stopper for tilt caused by rotation about the rotation axis A, (3) rotation in the circumferential direction CD, and (4) rotation stopper for rotation in the circumferential direction CD. The configuration that exhibits these functions will be described below.

[0048] Fig. 6 is a perspective view of movable frame 21 of lighting fixture 100 according to the embodiment. Fig. 7 is a side view of movable frame 21 of lighting fixture 100 according to the embodiment. Fig. 8 is a front view of movable frame 21 of lighting fixture 100 according to the embodiment. Fig. 9 is a diagram showing a state in which lighting fixture 1 of lighting fixture 100 according to the embodiment is tilted in one direction. Fig. 10 is a diagram showing a state in which lighting fixture 1 of lighting fixture 100 according to the embodiment is tilted in the opposite direction from the one direction.

[0049] As described above, the movable frame 21 has the annular flat plate portion 211, the pair of holding pieces 212, and the anti-rotation portion 213. The annular flat plate portion 211, the pair of holding pieces 212, and the anti-rotation portion 213 are integrally formed from a single piece of sheet metal.

[0050] The holding piece 212 has a lamp holder portion 212a that holds the lamp 1, and an inclination stopper portion 212b that restricts the inclination range of the lamp 1 around the rotation axis A. The holding piece 212 is composed of a plate-like piece formed by bending a metal plate that extends upward from the inner peripheral edge of the annular flat portion 211. The holding piece 212 has a first surface 2121 that extends upward from the inner peripheral edge of the annular flat portion 211 toward the lamp, a second surface 2122 that extends radially outward from the extending end of the first surface 2121, and a third surface 2123 that extends upward from the extending end of the second surface 2122.

[0051] The lamp holder 212a is formed with a third surface 2123. A cylindrical connecting hole 212a1 to which the connecting member 41 is connected is formed in the lamp holder 212a. The lamp holder 212a overlaps the inside of the arm 13 in the radial direction, and is connected to the arm 13 by the connecting member 41 passing through a through hole 13c of the arm 13 and being fixed to the connecting hole 212a1 of the lamp holder 212a. A thread is formed on the inner circumferential surface of the connecting hole 212a1, and the connecting member 41 is screwed into the thread groove and fixed. The two connecting holes 212a1 are provided opposite each other so that the axis centers of the holes are aligned on the same line, as shown by the dashed dotted line in FIG. 4.

[0052] With this configuration, the lamp 1 is rotatably held by the lamp holder 212a with the connecting member 41 fastened to the connecting hole 212a1 as the rotation axis A.

[0053] The inclined stopper portion 212b is formed by a second surface 2122. The inclined stopper portion 212b is formed by a flat surface parallel to the annular flat plate portion 211. When the lamp 1 rotates around the rotation axis A, the inclined stopper portion 212b abuts against the arm portion 13 as shown in FIGS. 9 and 10 , thereby restricting the inclination of the lamp 1. Specifically, when the lamp 1 rotates in one direction around the rotation axis A as shown in FIG. 9, the inclined surface 13a of the arm portion 13 abuts against the inclined stopper portion 212b, thereby restricting the inclination of the lamp 1. Furthermore, when the lamp 1 rotates in the opposite direction around the rotation axis A as shown in FIG. 10, the notched portion 13b of the arm portion 13 abuts against the inclined stopper portion 212b, thereby restricting the inclination of the lamp 1. The inclination range can be set by the inclination angle of the inclined surface 13a and the size of the notched portion 13b.

[0054] The anti-rotation portion 213 is configured as a protruding piece that protrudes upward from the inner peripheral edge of the annular flat portion of the movable frame 21. When the movable frame 21 rotates in the circumferential direction CD, the anti-rotation portion 213 restricts the rotation range by abutting against the stopper portion 241c of the movable frame support plate 241. Here, the rotation range is set to 355°, but it may be any range as long as it is less than 360°.

[0055] Here, as a comparative example, a movable frame having a conventional configuration will be described.

[0056] 11 is a perspective view of a movable frame 210 of a conventional lighting fixture. The conventional movable frame 210 has a cylindrical portion 210A and an annular flange portion 210B that protrudes radially outward along the edge of an opening on the illumination side of the cylindrical portion 210A. The cylindrical portion 210A has a cut-and-raised portion 210C cut and raised inward in a mountain shape. A pair of cut-and-raised portions 210C are formed with a gap in the circumferential direction. Each of the pair of cut-and-raised portions 210C has a through-hole 210D formed therein. A connecting member (not shown) is passed through the through-hole 210D and screwed to a lamp (not shown), thereby connecting the lamp to the pair of cut-and-raised portions 210C so that the connecting member serves as a rotation axis A. The rotation axis A extends in a vertical direction perpendicular to the direction of light irradiation, and the lamp can be rotated around this rotation axis A, allowing it to tilt freely relative to the central axis B of the movable frame 210, and the direction of light irradiation can be moved linearly.

[0057] Furthermore, the flange portion 210B of the movable frame 210 is fixed to a frame body (not shown) so as to be rotatable in the circumferential direction CD. This allows the lamp connected to the movable frame 210 to rotate freely in the circumferential direction CD around the central axis B, and makes it possible to move the light irradiation direction in an arc.

[0058] As described above, the conventional movable frame 210 has a shape based on the cylindrical portion 210A. The conventional movable frame 210 requires the flange portion 210B to enable rotation in the circumferential direction CD. Because the conventional movable frame 210 has a shape based on the cylindrical portion 210A, drawing is required to form the flange portion 210B, which complicates the manufacturing process.

[0059] In contrast, the movable frame 21 of the embodiment is based on a plate member, and the annular flat plate portion 211 is fixed to the mounting surface 2011 of the frame body 20 so as to be rotatable in the circumferential direction CD, thereby rotatably holding the lamp 1. Therefore, the movable frame 21 of the embodiment does not require drawing to form the conventional flange portion 210B.

[0060] Furthermore, the conventional movable frame 210 requires the cut-and-raised portion 210C to form a flat surface for connecting a lamp fixture. In the conventional movable frame 210, forming the cut-and-raised portion 210C is also complicated. Specifically, the cut-and-raised portion 210C is formed through the following steps. First, the step of forming the cut-and-raised portion 210C includes a step of making a cut at the boundary between the cylindrical portion 210A and the flange portion 210B without breaking the circular shape of the cylindrical portion 210A. Furthermore, the step of forming the cut-and-raised portion 210C includes a step of, after the above step, pushing inward the arc-shaped portion of the cylindrical portion 210A that has been cut and separated from the flange portion 210B to form a mountain-shaped shape consisting of two flat surfaces. Forming the cut-and-raised portion 210C requires the above two steps, which is complicated.

[0061] In contrast, in the movable frame 21 of the embodiment, the retaining piece 212, which is the part that holds the lamp 1 so that it can be tilted freely, is a plate-like piece that extends from the inner peripheral edge of the annular flat portion 211 toward the lamp, and there is no need to form the conventional cut-and-raised portion 210C.

[0062] As described above, the movable frame 21 of the embodiment has a simpler structure than the conventional movable frame 210 based on the cylindrical portion 210A. The movable frame 21 configured as described above is capable of holding the lamp 1 in a tiltable and rotatable manner despite its simple structure.

[0063] Furthermore, in conventional movable frame 210, cut-and-raised portion 210C is formed with through-hole 210D for passing a connecting member therethrough, but if cut-and-raised portion 210C is thin, it is difficult to thread the inner circumferential surface of through-hole 210D. For this reason, if threads are not threaded on the inner circumferential surface of through-hole 210D, a nut is required to secure the connecting member to cut-and-raised portion 210C, resulting in an increase in the number of parts. In conventional movable frame 210, if cut-and-raised portion 210C is thickened, it becomes possible to thread the inner circumferential surface of through-hole 210D, but this inevitably increases the radial size of cylindrical portion 210A and the size of the device.

[0064] In contrast, when the thickness of the movable frame 21 of the embodiment is increased, only the thickness in the direction of the central axis B increases, and the size in the radial direction does not change. Therefore, the movable frame 21 can be configured with a thickness that allows threading of the connecting hole portion 212a1.

[0065] Furthermore, in the conventional movable frame 210, the cut-and-raised portion 210C has a shape that protrudes radially inward, so the external shape of the lighting fixture 1 placed inside the movable frame 210 must be made smaller than that of the movable frame 21 of the embodiment. If the lighting fixture 1 cannot be made smaller due to heat dissipation requirements, the diameter of the movable frame 210 must be increased, and the overall size of the fixture must be made larger.

[0066] In contrast, in the movable frame 21 of the embodiment, the surface of the lamp holder 212a and the outer shape of the movable frame 21 are substantially the same, so there are fewer restrictions on the diameter. Therefore, the movable frame 21 of the embodiment can be made smaller than the conventional movable frame 210.

[0067] In a lighting fixture 100 such as a downlight, the diameter of the recessed hole 110 is fixed, and the lighting fixture 1 of the embodiment can be applied to a recessed hole with a small diameter (for example, Φ74). In addition, the lighting fixture 1 is equipped with a lens 112, and the lens 112 can be used to control the light distribution over a small diameter.

[0068] [Effects of lighting fixture 100] As described above, the lighting fixture 100 comprises the lamp 1 that emits light and the frame member 2 that supports the lamp 1. The frame member 2 comprises a cylindrical frame body 20 that is arranged so that the lamp 1 is located on the central axis B, and an annular movable frame 21 that is arranged on the mounting surface 2011 of the frame body 20 on the lamp 1 side in the axial direction of the central axis B. The movable frame 21 has an annular, plate-shaped annular flat plate portion 211 that is fixed to the mounting surface 2011 so as to be rotatable in the circumferential direction CD of the frame body 20, and a pair of holding pieces 212 that are plate-like pieces extending from the inner peripheral edge of the annular flat plate portion 211 toward the lamp 1 and that are formed so as to sandwich the lamp 1 in a vertical direction perpendicular to the irradiation direction of the lamp 1. The holding piece 212 has a lamp holding portion 212a that supports the lamp 1 so that it can rotate freely around a rotation axis A that is perpendicular to the irradiation direction of the lamp 1, thereby supporting the lamp 1 so that it can tilt freely with respect to the central axis B of the frame member 2.

[0069] With the above configuration, the movable frame 210 can hold the lamp 1 in a tiltable and rotatable manner despite its simple structure.

[0070] The holding piece 212 has an inclination stopper portion 212b that restricts the inclination range of the lighting fixture 1, so that the inclination range of the lighting fixture 1 can be restricted.

[0071] As a specific configuration for restricting the tilt range of the lighting fixture 1, the lighting fixture 100 has the following configuration. The lighting fixture 100 comprises a light source unit 11 that emits light, and a heat sink 12 that is attached to the light source unit 11 and dissipates heat generated by the light source unit 11. The lighting fixture 100 further comprises a pair of plate-shaped arms 13 that connect the heat sink 12 to a pair of holding pieces 212. When the lighting fixture 1 rotates around the rotation axis A, the arms 13 come into contact with the tilt stopper portions 212b of the holding pieces 212, thereby restricting the tilt range.

[0072] The frame member 2 has a rotation prevention mechanism 50 that restricts the rotation range of the movable frame 21 in the circumferential direction CD, thereby restricting the rotation range of the lighting fixture 1. As a result, the lighting device 100 can prevent the wiring 4 from becoming twisted.

[0073] As a specific configuration for restricting the rotation range of the lighting fixture 1, the lighting fixture 100 has the following configuration. The frame member 2 of the lighting fixture 100 is equipped with a frame fixing member 24 that fixes the annular flat plate portion 211 of the movable frame 21 to the frame body 20 so as to be rotatable in the circumferential direction CD. A stopper portion 241c is formed on the frame fixing member 24. The annular flat plate portion 211 is formed with a rotation prevention portion 213 that abuts against the stopper portion 241c when the movable frame 21 rotates in the circumferential direction CD. The stopper portion 241c and the rotation prevention portion 213 form a rotation prevention mechanism 50. The rotation prevention portion 213 is composed of a protruding piece that protrudes from the inner peripheral edge of the annular flat plate portion 211 toward the lighting fixture 1.

[0074] The holding piece 212 has a first surface 2121 extending from the inner peripheral edge of the annular flat plate portion 211 toward the lamp 1, a second surface 2122 extending from the extending end of the first surface 2121 radially outward of the annular flat plate portion 211, and a third surface 2123 extending from the extending end of the second surface 2122 toward the lamp 1. The lamp holding portion 212a is made up of the third surface 2123. Furthermore, the inclined stopper portion 212b is made up of the second surface 2122. In this way, the lamp holding portion 212a and the inclined stopper portion 212b can be made up of surface portions formed on the holding piece 212, resulting in a simple structure.

[0075] Although the present disclosure has been described above based on the embodiments, the present disclosure is not limited to the configuration of the above-described embodiments. For example, lighting fixture 100 may be attached to a mounting location other than a ceiling. Furthermore, the illustrated lighting fixture 100 is merely an example and may include other components. In short, the present disclosure encompasses design modifications and application variations that would normally be made by a person skilled in the art, provided that they do not deviate from the technical spirit of the present disclosure. [Explanation of symbols]

[0076] REFERENCE SIGNS LIST 1 lighting fixture, 2 frame member, 3 lighting device, 4 wiring, 11 light source unit, 12 heat sink, 13 arm portion, 13a inclined surface, 13b cutout portion, 13c through hole, 20 frame body, 20c mounting groove, 21 movable frame, 23 mounting spring, 24 frame portion fixing member, 31 support fixing portion, 40 fixing member, 41 connecting member, 50 anti-rotation mechanism, 100 lighting fixture, 110 recessed hole, 111 light source module, 111a light emitting board, 111b socket, 112 lens, 112a lens holder, 113 light source holder, 114 closure plate, 120 base member, 121 heat sink main body portion, 201 side wall portion, 202 support plate fixing portion, 202a screw hole, 202b convex portion, 203 Flange portion, 210 movable frame, 210A cylindrical portion, 210B flange portion, 210C cut-out portion, 210D through hole, 211 annular flat plate portion, 212 holding piece, 212a lamp holder portion, 212a1 connecting hole portion, 212b inclined stopper portion, 213 anti-rotation portion, 241 movable frame support plate, 241a notch, 241b positioning hole, 241c stopper portion, 242 fixing member, 2011 mounting surface, 2021 mounting surface, 2121 first surface, 2122 second surface, 2123 third surface, 2411 inner peripheral edge portion, A rotation axis, B central axis, CD circumferential direction.

Claims

1. A lighting fixture that emits light; a frame member supporting the lamp, The frame member is a cylindrical frame body arranged so that the lamp is positioned on a central axis; an annular movable frame disposed on a mounting surface of the frame body on the side of the lamp fixture in the axial direction of the central axis, The movable frame is an annular, plate-shaped annular flat plate portion fixed to the mounting surface so as to be rotatable in the circumferential direction of the frame body; a pair of plate-like retaining pieces extending from an inner peripheral edge of the annular flat plate portion toward the lamp fixture, the retaining pieces being formed so as to sandwich the lamp fixture in a direction perpendicular to the irradiation direction of the lamp fixture; The holding piece is a lamp holder that supports the lamp rotatably around the vertical direction as a rotation axis, thereby supporting the lamp so as to be tiltable relative to the central axis of the frame member; The retaining piece is a lighting fixture having a first surface extending from the inner peripheral edge of the annular flat portion toward the lighting fixture, and a second surface which is a flat surface extending radially outward from the extended end of the first surface of the annular flat portion and which constitutes an inclination stopper portion that regulates the inclination range of the lighting fixture.

2. The lighting fixture is a light source unit that emits light; a heat sink attached to the light source unit and configured to dissipate heat emitted from the light source unit; a pair of arms connecting the heat sink and the pair of holding pieces, The lighting fixture according to claim 1 , wherein the tilt range of the lighting fixture is restricted by the arm portion coming into contact with the tilt stopper portion of the holding piece when the lighting fixture rotates around the rotation axis.

3. The frame member is 3. The lighting fixture according to claim 1, further comprising a rotation prevention mechanism that restricts the rotation range of the movable frame in the circumferential direction.

4. The frame member is a frame fixing member that fixes the annular flat plate portion of the movable frame to the frame body so as to be rotatable in the circumferential direction, A lighting fixture as described in claim 3, wherein a stopper portion is formed on the frame portion fixing member, a rotation prevention portion is formed on the annular flat plate portion which abuts against the stopper portion when the movable frame rotates in the circumferential direction, and the rotation prevention mechanism is formed by the stopper portion and the rotation prevention portion.

5. 5. The lighting fixture according to claim 4, wherein the anti-rotation portion is formed by a protruding piece that protrudes from an inner peripheral edge of the annular flat plate portion toward the lighting fixture.

6. the holding piece has a third surface extending from an extending end of the second surface toward the lamp fixture, The lighting fixture according to any one of claims 1 to 5, wherein the lamp holder is formed by the third surface.

Images