Lighting fixture

Abstract

To provide a lighting device which can hold an attitude of a lamp with high accuracy.SOLUTION: A lighting device 100 includes: a lamp 2; and a support part 1. The support part 1 rotatably supports the lamp 2. The support part 1 includes: a body 10; a rotary member 11; a fastening member 16; and a contact member 17. The body 10 has a first hole H1 and a second hole H2. The second hole H2 intersects with the first hole H1. The fastening member 16 is inserted into the first hole H1 and fastens the rotary member 11 in a manner that the rotary member 11 may rotate relative to the body 10. The contact member 17 is inserted into the second hole H2 and contacts with the fastening member 16.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a lighting fixture.

Background Art

[0002] The spotlight described in Patent Document 1 includes a base, an arm, and a lamp unit. The base is fixed to the ceiling surface, and the lamp unit is coupled to the base via the arm. A joint that couples the lower end of the arm and the lamp unit includes a protruding plate that protrudes from the upper surface of one end of the lamp unit. The protruding plate is sandwiched between a pair of half members that constitute the arm. Through holes are formed in each half member and the protruding plate. A shaft screw is inserted through the through holes. The shaft screw passes through both half members and the protruding plate and is screwed into a thumb nut. By adjusting the screwing amount (rotational load) of the thumb nut with respect to the shaft screw, the lamp unit is rotated with respect to the arm or the lamp unit is fixed with respect to the arm.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the spotlight described in Patent Document 1, if the lamp unit is repeatedly rotated without adjusting the screwing amount of the thumb nut with respect to the shaft screw, the connection between the shaft screw and the thumb nut may become loose. Therefore, there is a possibility that the lamp unit cannot be fixed with respect to the arm. That is, the posture of the lamp unit cannot be accurately maintained in the posture desired by the user.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a lighting fixture that can accurately maintain the posture of a lamp unit.

Means for Solving the Problems

[0006] The lighting fixture disclosed in the present application includes a lamp unit and a support unit. The support unit rotatably supports the lamp unit. The support unit includes a main body unit, a rotating member, a tightening member, and a contact member. The main body unit has a first hole and a second hole intersecting the first hole. The tightening member is inserted into the first hole and tightens the rotating member rotatably with respect to the main body unit. The contact member is inserted into the second hole and contacts the tightening member.

[0007] In the lighting fixture disclosed in the present application, the first hole preferably intersects with the direction in which the main body unit extends. The second hole preferably extends along the direction in which the main body unit extends.

[0008] In the lighting fixture disclosed in the present application, the main body unit preferably further has a third hole through which wiring can be drawn out. The third hole extends along the direction in which the main body unit extends and preferably faces the first hole in the direction in which the main body unit extends.

Advantages of the Invention

[0009] According to the present invention, the posture of the lamp unit can be accurately maintained.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated. In the present specification, for the sake of easy understanding of the invention, the X direction, Y direction, and Z direction that are orthogonal to each other may be referred to for explanation. For example, the X direction and the Y direction are parallel to the horizontal direction, and the Z direction is parallel to the vertical direction. However, the X direction and the Y direction may be parallel to a direction other than the horizontal direction, and the Z direction may be parallel to a direction other than the vertical direction.

[0012] First, with reference to FIG. 1, a lighting fixture 100 according to an embodiment of the present invention will be described. FIG. 1 is a side view showing the lighting fixture 100 according to the embodiment.

[0013] The lighting fixture 100 is detachably attached to the duct rail 200. As shown in FIG. 1, the duct rail 200 is fixed to, for example, the ceiling C. In the present embodiment, the case where the lighting fixture 100 is attached to the duct rail 200 fixed to the ceiling C will be taken as an example to describe the lighting fixture 100. Note that the duct rail 200 may be embedded in the ceiling C, or may be suspended from the ceiling C by an arm or a wire or the like. Further, the duct rail 200 may be fixed to a wall or a floor. Therefore, the lighting fixture 100 may be disposed on a wall or a floor.

[0014] The lighting fixture 100 includes a support portion 1, a lamp unit 2, and a housing 3.

[0015] The lamp unit 2 has a light-emitting surface 2a. The lamp unit 2 emits light from the light-emitting surface 2a to the outside of the lamp unit 2.

[0016] The housing 3 is detachably attached to the duct rail 200. In the present embodiment, the housing 3 extends along the duct rail 200, for example, in a state where the lighting fixture 100 is attached to the duct rail 200. Note that the shape of the housing 3 is not particularly limited. The housing 3 may have, for example, a substantially cylindrical shape, a substantially frustum shape, or a substantially rectangular shape in a side view. The housing 3 houses at least the wiring cd connected to the lamp unit 2 (see FIG. 5).

[0017] The support portion 1 rotatably supports the lamp unit 2. Further, the support portion 1 connects the lamp unit 2 and the housing 3. The lighting fixture 100 of the present embodiment is a spotlight, and the support portion 1 rotatably supports the lamp unit 2 with respect to the housing 3. Specifically, for example, the lamp unit 2 is rotatable in the rotational direction R1 with respect to the housing 3. Therefore, the angle between the lamp unit 2 and the housing 3 can be changed. For example, the angle between the lamp unit 2 and the housing 3 can be changed within a range of 0° or more and 92° or less. Further, the lamp unit 2 is rotatable in the rotational direction R2 about the support portion 1 as the rotation axis AX (see FIG. 4).

[0018] Hereinafter, for convenience of explanation, the side where the lighting fixture 100 is disposed with respect to the duct rail 200 is defined as the "lower side", and the side where the duct rail 200 is disposed with respect to the lighting fixture 100 is defined as the "upper side", and the vertical direction may be defined in some cases.

[0019] Next, with reference to FIGS. 1 to 3, the lighting fixture 100 will be further described. FIG. 2 is a perspective view showing the lighting fixture 100. Specifically, FIG. 2 is a perspective view showing the lighting fixture 100 when viewed from the side opposite to the ceiling C with respect to the lighting fixture 100. FIG. 3 is a perspective view showing a state after the lighting fixture 100 shown in FIG. 2 rotates in the rotational direction R1. In FIGS. 2 and 3, for easy understanding of the invention, the housing 20 and the cover 22 of the lamp unit 2 are shown separated.

[0020] As shown in FIGS. 2 and 3, the lighting fixture 100 further includes a lid portion 31, a power supply device 5, a connection portion 6, and an engagement portion 7.

[0021] The power supply device 5 is housed, for example, inside the housing 3. The power supply device 5 generates the electric power to be supplied to the lighting fixture 2 based on an external power supply voltage. In the present embodiment, the electric power generated by the power supply device 5 is supplied to the lighting fixture 2 via, for example, the wiring cd housed in the housing 3.

[0022] In the present embodiment, the upper surface of the housing 3 is open. The lid portion 31 is disposed on the upper surface of the housing 3. Specifically, the lid portion 31 covers the open upper surface of the housing 3. That is, the lid portion 31 functions as, for example, a lid of the housing 3. The lid portion 31 is made of, for example, metal. The lid portion 31 is attached to the housing 3. Specifically, the lid portion 31 is fixed to the housing 3 by a fixing member 3b such as a screw, for example. Therefore, the heat of the power supply device 5 can be effectively dissipated by the lid portion 31.

[0023] The connection portion 6 projects upward through the notch 31n of the lid portion 31. The connection portion 6 is detachably and electrically connected to the duct rail 200. The connection portion 6 is, for example, a plug. An external power supply voltage is applied to the connection portion 6 from, for example, the duct rail 200. In the present embodiment, the connection portion 6 includes, for example, two plug terminals 61. When the plug terminal 61 is connected to the conductor portion of the duct rail 200, an external power supply voltage is applied from the conductor portion to the plug terminal 61. Then, the external power supply voltage applied to the connection portion 6 is transmitted from the plug terminal 61 to the power supply device 5 via a cable (not shown).

[0024] The engaging portion 7 is disposed on the lid portion 31, for example. Specifically, in the longitudinal direction of the lid portion 31, the engaging portion 7 is disposed on the side of the lid portion 31 opposite to the support portion 1. The engaging portion 7 engages with the duct rail 200, for example. Specifically, in a state where the lighting fixture 100 is attached to the duct rail 200, the engaging portion 7 is engaged inside the duct rail 200. Therefore, even when vibration is applied to the lighting fixture 100 due to the shaking of the building caused by an earthquake or the like, the engaging portion 7 engages with the duct rail 200, so that the lighting fixture 100 can be stably attached to the duct rail 200.

[0025] The lamp 2 includes a housing 20, a light source 21, a cover 22, and a mounting portion 23.

[0026] In the present embodiment, the housing 20 has a substantially cylindrical shape. Note that the housing 20 may have a substantially cubic shape or a substantially polygonal cylindrical shape. In the present embodiment, both ends of the housing 20 are open. Among both ends of the housing 20, the end far from the support portion 1 corresponds to the light-emitting surface 2a of the lamp 2.

[0027] The light source 21 is disposed inside the housing 20. The light source 21 emits light by being supplied with power from the power supply device 5 via the wiring cd. The light emitted by the light source 21 is emitted from the light-emitting surface 2a to the outside of the lamp 2. The light source 21 has, as a light-emitting element, for example, an LED (Light Emitting Diode) element. The light source 21 is, for example, an SMD (surface mount device) or a COB (chip on board). In the present embodiment, the light source 21 is a planar light source.

[0028] The cover 22 is disposed at an end of the housing 20. Specifically, the cover 22 is disposed at an end of the housing 20 opposite to the light-emitting surface 2a among both ends of the housing 20. The cover 22 covers the open end of the housing 20. The cover 22 has a notch 22n. In the present embodiment, the notch 22n has a square U shape in plan view. In a state where the cover 22 covers the end of the housing 20, at least a part of the support portion 1 is exposed through the notch 22n.

[0029] The mounting portion 23 is located inside the housing 20. In the present embodiment, the housing 20 and the mounting portion 23 are integrated. However, the housing 20 and the mounting portion 23 may be separate. In the present embodiment, the mounting portion 23 includes a mounting member 232, a mounting member 233, and a mounting member 234.

[0030] Each of the mounting members 232, 233, and 234 has, for example, a substantially plate shape. In the present embodiment, the mounting member 232, the mounting member 233, and the mounting member 234 are integrated. The mounting member 233 connects a predetermined position on the inner surface of the housing 20 and a position on the inner surface of the housing 20 opposite to the predetermined position. Therefore, the rigidity of the lighting fixture 2 can be increased. Each of the mounting members 232 and 234 intersects the mounting member 233. In the example shown in FIG. 2, each of the mounting members 232 and 234 is substantially orthogonal to the mounting member 233. Further, the mounting member 233 and the mounting member 234 face each other.

[0031] In the present embodiment, the mounting member 232 has a rib 232a (see FIG. 6). In a cross-sectional view, the rib 232a is disposed at an end of the mounting member 232. The rib 232a extends along the direction in which the housing 20 extends, and a screw hole is provided at an end of the rib 232a. Further, the mounting member 233 has a rib 233a. In a cross-sectional view, the rib 233a is disposed at a central portion of the mounting member 233. The rib 233a extends along the direction in which the housing 20 extends, and a screw hole is provided at an end of the rib 233a. Furthermore, the mounting member 234 has a rib 234a. In a cross-sectional view, the rib 234a is disposed at an end of the mounting member 234. The rib 234a extends along the direction in which the housing 20 extends, and a screw hole is provided at an end of the rib 234a.

[0032] The support portion 1 includes a main body portion 10 and a rotating member 11.

[0033] In the present embodiment, the main body portion 10 extends in the first direction D1. Specifically, in a state where the lighting fixture 100 is mounted on the duct rail 200, the main body portion 10 extends along the Z direction (vertical). In the present embodiment, the main body portion 10 rotates, for example, in the rotation direction R2 and does not rotate in the rotation direction R1 (see FIG. 4).

[0034] The rotating member 11 has a substantially T-shaped configuration in a plan view. In the present embodiment, the rotating member 11 includes a mounting member 12, a mounting member 13, a mounting member 14, and a base portion 15. In the present embodiment, the mounting member 12, the mounting member 13, the mounting member 14, and the base portion 15 are integral. Note that the mounting member 12, the mounting member 13, the mounting member 14, and the base portion 15 may be separate from each other.

[0035] In the present embodiment, the base portion 15 has, for example, a square U-shaped configuration. The base portion 15 surrounds at least a part of the main body portion 10 (see FIG. 4). Each of the mounting member 12, the mounting member 13, and the mounting member 14 extends from the base portion 15 in different directions from each other. Specifically, the mounting member 12 and the mounting member 14 extend from the base portion 15 in opposite directions from each other. Further, the mounting member 13 extends from the base portion 15 substantially orthogonally to each of the mounting member 12 and the mounting member 14. The mounting member 12 has an opening 12h. Also, the mounting member 13 has an opening 13h. Furthermore, the mounting member 14 has an opening 14h.

[0036] The mounting member 12 is mounted to the mounting member 232 by screwing a screw 12b through the opening 12h of the mounting member 12 into a screw hole of a rib 232a (see FIG. 6). Also, the mounting member 13 is mounted to the mounting member 233 by screwing a screw 13b through the opening 13h of the mounting member 13 into a screw hole of a rib 233a. Furthermore, the mounting member 14 is mounted to the mounting member 234 by screwing a screw 14b through the opening 14h of the mounting member 14 into a screw hole of a rib 234a. As a result, the rotating member 11 is fixed to the mounting portion 23.

[0037] In the present embodiment, the rotating member 11 is rotatable with respect to the main body portion 10. When the lamp 2 shown in FIG. 2 rotates in the rotation direction R1 with respect to the housing 3, as shown in FIG. 3, the rotating member 11 fixed to the mounting portion 23 of the lamp 2 rotates in the rotation direction R1 with respect to the main body portion 10. Attachment of the rotating member 11 to the main body portion 10 will be described later with reference to FIGS. 4 to 6.

[0038] In this embodiment, the cover 22 of the lighting fixture 2 has three engaging portions (not shown). The three engaging portions of the cover 22 are, for example, curved or refracted. Further, the three engaging portions of the cover 22 are respectively arranged corresponding to the opening 12h of the mounting member 12, the opening 13h of the mounting member 13, and the opening 14h of the mounting member 14. When the three engaging portions of the cover 22 engage with the openings 12h to 14h respectively, the cover 22 is attached to the housing 20.

[0039] Next, with reference to FIGS. 4 to 6, the support portion 1 will be described. FIG. 4 is a perspective view showing an enlarged support portion 1. FIG. 5 is a perspective view showing the support portion 1 shown in FIG. 4 from another direction. FIG. 6 is a cross-sectional view of the lighting fixture 100 taken along the cross-section line A-A of FIG. 1. To facilitate understanding of the invention, in FIGS. 4 and 5, the support portion 1 of the lighting fixture 100 with the inclination shown in FIG. 3 is shown, and FIG. 6 shows the lighting fixture 100 with the inclination shown in FIG. 2. Further, in FIGS. 4 and 5, the lighting fixture 2 is omitted.

[0040] As shown in FIGS. 4 and 5, the support portion 1 includes a fastening member 16 and a contact member 17. The fastening member 16 is, for example, a screw. In this embodiment, the fastening member 16 has a screw head 16a and a shaft portion 16b. The radial size of the screw head 16a is larger than the radial size of the shaft portion 16b. The shaft portion 16b has a spiral screw groove. Note that in FIGS. 4 and 5, the screw groove of the shaft portion 16b is omitted.

[0041] In this embodiment, the support portion 1 further includes a threaded member 16c. The threaded member 16c is, for example, a washer. Specifically, the threaded member 16c is, for example, a spring washer or a disc spring. The threaded member 16c has, for example, a substantially mortar shape or a substantially frustum shape and has elasticity. The threaded member 16c is disposed between the screw head 16a and the rotating member 11. For example, by tightening the tightening member 16, the threaded member 16c is elastically deformed and a rotational load is applied to the rotating member 11. Note that the shape of the threaded member 16c is not particularly limited. The threaded member 16c may have, for example, a substantially annular shape. Also, the threaded member 16c may not be disposed between the screw head 16a and the rotating member 11.

[0042] The contact member 17 is, for example, a screw. Specifically, in this embodiment, the contact member 17 is, for example, a set screw with a hexagonal socket, and the diameter in the radial direction of the screw head portion and the diameter in the radial direction of the shaft portion are substantially the same. The set screw with a hexagonal socket is a so-called wood screw, machine screw, or hollow set. However, the contact member 17 may have a different diameter in the radial direction of the screw head portion and the diameter in the radial direction of the shaft portion. Also, a hole having a shape different from a hexagon may be provided in the screw head portion.

[0043] The main body portion 10 has a first surface 10a, a second surface 10b, a third surface 10c, a fourth surface 10d, a first hole H1, a second hole H2, and a convex portion 10p.

[0044] The first surface 10a faces the base portion 15 and the mounting member 12 in a second direction D2 that intersects a first direction D1 in which the main body portion 10 extends. Specifically, in this embodiment, the second direction D2 is orthogonal to the first direction D1. Also, in a state where the lighting fixture 100 is mounted on the duct rail 200, the second direction D2 is along the Y direction.

[0045] The second surface 10b faces the base portion 15 and the mounting member 14 in the second direction D2. The second surface 10b and the third surface 10c face the first surface 10a in the second direction D2. The second surface 10b and the third surface 10c are substantially parallel. Also, the second surface 10b and the third surface 10c have a step. In the present embodiment, the third surface 10c is closer to the first surface 10a than the second surface 10b in the second direction D2.

[0046] The fourth surface 10d intersects each of the second surface 10b and the third surface 10c. Specifically, the fourth surface 10d is substantially perpendicular to each of the second surface 10b and the third surface 10c. The fourth surface 10d connects the second surface 10b and the third surface 10c. The fourth surface 10d faces the housing 3 in the first direction D1. Specifically, the fourth surface 10d faces the opening 3h of the housing 3. The opening 3h is disposed on the lower surface of the housing 3.

[0047] The convex portion 10p protrudes from the third surface 10c in the second direction D2. In the present embodiment, the convex portion 10p has a substantially keyhole shape in plan view. Also, in the present embodiment, the convex portion 10p is disposed in a space Sp formed by the third surface 10c and the fourth surface 10d of the main body portion 10. The space Sp is, for example, a recess provided in the main body portion 10.

[0048] The first hole H1 intersects the first direction D1 in which the main body portion 10 extends. That is, the first hole H1 is substantially perpendicular to the first direction D1. Also, the first hole H1 extends along the second direction D2. In the present embodiment, the first hole H1 penetrates the main body portion 10. Specifically, the first hole H1 penetrates the third surface 10c and the convex portion 10p from the first surface 10a of the main body portion 10 in the second direction D2.

[0049] The tightening member 16 is inserted into the first hole H1 and tightens the rotating member 11 so as to be rotatable with respect to the main body portion 10. Specifically, by screwing the tightening member 16 into the first hole H1 via the threaded member 16c and the base portion 15 of the rotating member 11, the threaded member 16c is elastically deformed and a rotational load is applied to the rotating member 11. That is, the rotating member 11 is tightened toward the main body portion 10 to such an extent that the rotating member 11 is rotatable with respect to the main body portion 10. Therefore, the rotating member 11 is rotatable with respect to the main body portion 10.

[0050] Also, when the tightening member 16 is screwed into the first hole H1 via the threaded member 16c, the screw head 16a presses the threaded member 16c against the base portion 15 of the rotating member 11 to such an extent that the rotating member 11 can rotate with respect to the main body portion 10. Then, the threaded member 16c presses the base portion 15 of the rotating member 11 against the main body portion 10 to such an extent that the rotating member 11 can rotate with respect to the main body portion 10. That is, the tightening member 16 applies a rotational load to the rotating member 11. Further, the tightening member 16 applies a rotational load to the rotating member 11 to such an extent that the rotating member 11 to which force is applied rotates with respect to the main body portion 10, while the rotating member 11 in a state where no force is applied does not rotate with respect to the main body portion 10. Therefore, a rotational load is applied to the mounting portion 23 (lamp 2) fixed to the rotating member 11. As a result, the lamp 2 can be rotated to a desired posture with respect to the housing 3 and the lamp 2 can be held in the desired posture. Note that the shaft portion 16b of the tightening member 16 may or may not penetrate the first hole H1.

[0051] In the present embodiment, the second hole H2 is disposed in the convex portion 10p. The second hole H2 intersects the first hole H1. Further, the second hole H2 extends along the first direction D1 in which the main body portion 10 extends. That is, in the present embodiment, the second hole H2 is substantially orthogonal to the first hole H1. Therefore, compared with the case where the first hole H1 extends along the first direction D1 and the second hole H2 extends along the second direction D2, displacement of the tightening member 16 in the first direction D1 due to its own weight can be suppressed.

[0052] In addition, in the present embodiment, the second hole H2 penetrates through the convex portion 10p up to the first hole H1. That is, the cavity forming the second hole H2 is connected to the cavity forming the first hole H1.

[0053] The contact member 17 is inserted into the second hole H2 and contacts the fastening member 16 inserted into the first hole H1. Specifically, for example, the tip portion of the contact member 17 engages with the thread groove formed in the shaft portion 16b of the fastening member 16. Therefore, rotation of the fastening member 16 can be suppressed. As a result, even when the lighting fixture 2 is rotated in the rotational direction R1 a plurality of times, displacement of the fastening member 16 and the screwing member 16c in the direction away from the main body portion 10 (second direction D2) can be prevented. In addition, since displacement of the screw head 16a of the fastening member 16 and the screwing member 16c in the direction away from the main body portion 10 (second direction D2) can be prevented, a reduction in the rotational load applied by the fastening member 16 and the screwing member 16c to the rotating member 11 can be prevented. As a result, even when the lighting fixture 2 is rotated in the rotational direction R1 a plurality of times, the state in which the fastening member 16 and the screwing member 16c apply a rotational load to the rotating member 11 is maintained, and the posture of the lighting fixture 2 can be accurately held.

[0054] Further, according to the present embodiment, in the manufacturing process of the lighting fixture 100, after adjusting the tightening amount (tightening torque) of the fastening member 16 so that the rotational load applied to the rotating member 11 becomes appropriate, the contact member 17 is brought into contact with the fastening member 16. Therefore, displacement of the fastening member 16 in the direction away from the main body portion 10 (second direction D2) can be prevented, and an appropriate rotational load applied to the rotating member 11 can be maintained.

[0055] Furthermore, according to the present embodiment, since a screwing member such as a nut is not screwed onto the tip of the fastening member, the possibility of loosening of the connection between the fastening member and the screwing member is eliminated. As a result, displacement of the fastening member in the second direction D2 can be prevented.

[0056] Furthermore, according to the present embodiment, the fastening member 16 can be prevented from being displaced in the second direction D2 without adhering the fastening member 16 and the first hole H1 by an adhesive means. For example, it is unnecessary to adhere the fastening member to the first hole by an adhesive means such as an adhesive. Therefore, compared with the case where the fastening member 16 and the first hole H1 are adhered, the lighting fixture 100 is easier to disassemble. As a result, for example, the maintainability of the lighting fixture 100 is improved. Also, compared with the case where the fastening member 16 and the first hole H1 are adhered, the assembly of the lighting fixture 100 is easier.

[0057] Next, with continued reference to FIGS. 5 and 6, the third hole H3 from which the wiring cd is drawn out will be described. As shown in FIGS. 5 and 6, the main body portion 10 has a third hole H3, and the third hole H3 is disposed on the fourth surface 10d of the main body portion 10. In the present embodiment, the third hole H3 extends along the first direction D1 in which the main body portion 10 extends. Also, the third hole H3 faces the convex portion 10p of the main body portion 10 in the first direction D1. That is, the third hole H3 faces the first hole H1 that penetrates the convex portion 10p.

[0058] The wiring cd is drawn out from the third hole H3. The wiring cd is, for example, housed in the housing 3 and connects the power supply device 5 and the light source 21. Therefore, compared with the case where a screwing member such as a nut is screwed to the tip of the fastening member 16, a larger space for the wiring cd drawn out from the third hole H3 can be secured in the space Sp formed by the third surface 10c and the fourth surface 10d of the main body portion 10. This is because when a screwing member such as a nut is screwed to the tip of the fastening member 16, the screwing member is, for example, disposed in the space Sp. Also, compared with the case where a screwing member such as a nut is screwed to the tip of the fastening member 16, the size of the main body portion 10 can be reduced while securing a space for the wiring cd drawn out from the third hole H3 in the space Sp. Note that a screwing member such as a nut may be screwed to the tip of the fastening member 16.

[0059] The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiments and modifications, and can be implemented in various forms without departing from the gist thereof. The drawings schematically show each component mainly for easy understanding, and the D, length, number, etc. of each illustrated component may be different from the actual ones for convenience in drawing preparation. Also, the shapes, dimensions, etc. of each component shown in the above embodiments are merely examples and are not particularly limited, and various changes can be made without substantially departing from the effects of the present invention.

[0060] (1) In the present embodiment, the lighting fixture 100 is attached to the duct rail 200. However, the lighting fixture 100 may be directly attached to a mounting surface such as the ceiling C, wall, or floor. In this case, the lighting fixture 100 is attached to the mounting surface by a fixing member such as a screw, for example. Specifically, for example, the housing 3 of the lighting fixture 100 is attached to the mounting surface by a fixing member.

[0061] (2) In the present embodiment, the power supply device 5 is housed inside the housing 3. However, the power supply device 5 does not necessarily have to be housed inside the housing 3. The power supply device 5 may be arranged in the lamp unit 2, for example. In this case, the housing 3 may house a wiring for connecting the power supply device 5 and the connection part 6. Also, the housing 3 may house the power supply device 5, a wiring for connecting the power supply device 5 and the connection part 6, and a wiring for connecting the power supply device 5 and the light source 21.

[0062] (3) In the present embodiment, the lighting fixture 100 includes a housing 3 that houses the power supply device 5. However, the lighting fixture 100 does not necessarily have to include the housing 3. For example, when the lighting fixture 100 is directly attached to a mounting surface such as the ceiling, the power supply device 5 is arranged on the back side of the mounting surface.

[0063] (4) In this embodiment, the cover 22 is attached to the housing 20 by engaging the three engaging portions of the cover 22 with the openings 12h to 14h of the rotating member 11, respectively. However, the cover 22 may be adhered to the housing 20, or the cover 22 may be screwed into the housing 20. In this case, the cover 22 may or may not have three engaging portions.

[0064] (5) In this embodiment, the first hole H1 extends along the second direction D2, and the second hole H2 extends along the first direction D1. However, the first hole H1 may extend along the first direction D1, and the second hole H2 may extend along the second direction D2.

Industrial Applicability

[0065] The present invention can be used in the field of lighting fixtures and has industrial applicability.

Explanation of Reference Numerals

[0066] 100 Lighting fixture 1 Support portion 10 Main body portion 11 Rotating member 16 Fastening member 17 Contact member 2 Lamp cd Wiring H1 First hole H2 Second hole H3 Third hole

Claims

1. a lighting fixture, a support portion for rotatably supporting the lighting fixture, and comprising: the support portion includes a main body portion having a first hole and a second hole intersecting the first hole, a rotating member, a fastening member inserted into the first hole for fastening the rotating member rotatably with respect to the main body portion, and a contact member inserted into the second hole and contacting the fastening member, wherein the fastening member has a shaft portion formed with a thread groove, and a tip portion of the contact member inserted into the second hole engages with the thread groove formed in the shaft portion of the fastening member. A lighting fixture.

2. the first hole intersects the direction in which the main body portion extends, and the second hole is along the direction in which the main body portion extends. The lighting fixture according to Claim 1.

3. the main body portion further has a third hole through which wiring is drawn out, [[ID=**17**]]the third hole is along the direction in which the main body portion extends and faces the first hole in the direction in which the main body portion extends. The lighting fixture according to Claim 1 or Claim **2**.

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