Lighting fixtures

Abstract

To improve the ease of installation of lighting fixtures. [Solution] The lighting fixture comprises a lighting unit 10, an arm 6 that rotatably supports the lighting unit 10 via a pivot shaft 52, a connecting part 44 that connects the lighting unit 10 and the arm 6, and a rotation restricting part 8 that restricts the range of rotation of the lighting unit 10 relative to the arm 6. The rotation restricting part 8 has an arc-shaped slit 62 centered on the pivot shaft 52, formed on either the connecting part 44 or the arm 6, and a guide part 53 formed on either the connecting part 44 or the arm 6 and inserted into the slit 62. The lighting unit 10 rotates relative to the arm 6 by moving the guide part 53 along the slit 62. A first fastening member for fixing the lighting unit 10 to the arm 6 is provided on only one of the pivot shaft 52 and the guide part 53, and the connecting part 44 is connected to the side surface of the top plate 41.

Description

Technical Field

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

Background Art

[0002] Conventionally, a so-called high-ceiling lighting fixture that is installed in a building with a high ceiling such as a gymnasium or a hall and illuminates the lighting space from above is known (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, the lighting fixture of Patent Document 1 includes an arm attached to an attachment portion such as a ceiling and a light source unit rotatably held by the arm. This arm is U-shaped and has an attachment portion attached to the attachment portion and a pair of arm portions extending from both ends of the attachment portion. The light source unit is rotatably held on this arm portion. A round hole serving as a fulcrum for the rotation of the light source unit and an arc-shaped long hole for guiding the rotation are formed in each of the pair of arm portions. Two angle adjustment bolts are inserted into each of these round holes and long holes. That is, in Patent Document 1, the arm and the light source unit are connected by four angle adjustment bolts.

[0005] Here, the lighting fixture of Patent Document 1 can adjust the irradiation angle of the light source unit. To adjust this irradiation angle, first, all four angle adjustment bolts are loosened, and the irradiation angle of the light source unit is set. Then, by tightening all four angle adjustment bolts, the light source unit is fixed to the arm. That is, to adjust the irradiation angle of the light source unit, it is necessary to loosen and tighten the four angle adjustment bolts.

[0006] Therefore, this disclosure aims to provide lighting fixtures with improved ease of installation. [Means for solving the problem]

[0007] To achieve the above objective, a lighting fixture according to one embodiment of the present disclosure includes a lighting unit having a base plate to which a light source is attached and a top plate arranged opposite to the base plate, an arm that rotatably supports the lighting unit via a pivot axis, a connecting portion that connects the lighting unit and the arm, and a rotation restricting portion that restricts the range of rotation of the lighting unit relative to the arm, wherein the rotation restricting portion has an arc-shaped slit formed in either the connecting portion or the arm, centered on the pivot axis, and a guide portion formed in either the connecting portion or the arm and inserted into the slit, the lighting unit rotates relative to the arm by moving the guide portion along the slit, a first fastening member for fixing the lighting unit to the arm is provided on either the pivot axis or the guide portion, and the connecting portion is connected to the side surface of the top plate. [Effects of the Invention]

[0008] This configuration improves the ease of installation of lighting fixtures. [Brief explanation of the drawing]

[0009] [Figure 1] A perspective view of the lighting fixture according to this embodiment, seen from above. [Figure 2] A perspective view of the lighting fixture according to this embodiment, seen from below. [Figure 3] A side view of the lighting fixture according to this embodiment. [Figure 4] A plan view of the heat dissipation section according to this embodiment, seen from above. [Figure 5] A perspective view of the arm from above. [Figure 6] Side view of the second support section [Figure 7] A perspective view of the lighting fixture according to Embodiment 2, seen from above. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described in detail below with reference to the drawings. The following description of preferred embodiments is essentially illustrative and is not intended to limit the present invention, its applications, or its uses in any way.

[0011] [Embodiment 1] In the following explanation, the up / down, left / right, and front / back directions of the lighting fixture will be defined using the up / down, left / right, and front / back arrows shown in Figure 1.

[0012] As shown in Figure 1, the lighting fixture according to this embodiment comprises a light source unit 1, a power supply unit 2, a heat dissipation unit 3, a holding unit 4, an arm 6, a wireless communication unit 7, and a rotation restricting unit 8. Of these lighting fixtures, the light source unit 1, power supply unit 2, heat dissipation unit 3, holding unit 4, wireless communication unit 7, and rotation restricting unit 8 constitute the lighting unit 10.

[0013] The holding section 4 holds the light source unit 1. The holding section 4 has a top plate 41, a bottom plate 42, a pair of first support sections 43, and a pair of second support sections 44. The light source unit 1 is attached to the bottom surface of the bottom plate 42. The pair of first support sections 43 and the pair of second support sections 44 support the top plate 41 and the bottom plate 42 with the upper surface of the bottom plate 42 facing the lower surface of the top plate 41.

[0014] The power supply unit 2 is mounted on the top surface of the top plate 41. The heat dissipation unit 3 is mounted on the top surface of the bottom plate 42.

[0015] The wireless communication unit 7 is configured to perform wireless communication. For example, the wireless communication unit 7 is configured to transmit and receive communication signals wirelessly to an externally located communication device (not shown).

[0016] (Light source unit) As shown in FIG. 2, the light source unit 1 includes an LED (Light Emitting Diode) module corresponding to a light source, a cover 10, and a packing 11.

[0017] The LED module has, for example, a plurality of LEDs and a mounting substrate 12. Each LED is, for example, a package-type white LED or the like that is well-known in the art. The mounting substrate 12 is composed of a rectangular flat resin substrate. The mounting substrate 12 is fixed to the lower surface of the bottom plate 42, for example, by screwing.

[0018] The plurality of LEDs are mounted side by side vertically and horizontally on the lower surface of the mounting substrate 12. Also, a receptacle connector is mounted on the lower surface of the mounting substrate 12. The receptacle connector is electrically connected to the electrodes (cathode and anode) of each LED via conductors for wiring formed on the lower surface of the mounting substrate 12.

[0019] The cover 10 is attached to the holding portion 4 so as to cover the LED module. The cover 10 is formed of a synthetic resin material having light-transmitting properties such as polycarbonate resin.

[0020] The cover 10 has a main body portion 101 and a flange portion 102. The main body portion 101 is formed in a flat rectangular box shape having an opening (not shown) on the upper surface. The flange portion 102 is formed integrally with the main body portion 101 so as to project outward from the periphery of the opening of the main body portion 101. That is, when the cover 10 is viewed from above, the flange portion 102 is formed in a rectangular frame shape. By screwing the flange portion 102 to the bottom plate 42, the cover 10 is attached to the holding portion 4.

[0021] The packing 11 is substantially the same shape as the flange portion 102 and has a rectangular frame shape when viewed from above. The packing 11 is made of, for example, rubber or resin material. The packing 11 is interposed between the flange portion 102 of the cover 10 and the bottom plate 42 of the retaining portion 4. The packing 11 prevents dust or water droplets from entering the cover 10.

[0022] (Power supply unit) The power supply unit 2 comprises a power supply block and a case 20 that houses the power supply block inside.

[0023] The power supply block has a power conversion circuit that converts power supplied from an external power source (for example, AC power supplied from a commercial power source) into the power required by the light source unit 1 (DC power). The power conversion circuit includes, for example, a full-wave rectifier, a power factor correction circuit (boost chopper circuit), and a DC / DC converter (buck chopper circuit). The power supply block is constructed, for example, by mounting numerous circuit components that constitute the power conversion circuit on the surface of a printed circuit board. The power supply block also has an output cable with a plug connector at its end.

[0024] Furthermore, the power conversion circuit controls the lighting state of the light source unit 1 according to the communication signal received by the wireless communication unit 7. This communication signal contains information such as whether the light source unit 1 is ON / OFF and the dimming level, and the power conversion circuit controls the lighting state of the light source unit 1 according to the communication signal. The wireless communication unit 7 is connected to the power conversion circuit by a power cable (not shown). The power conversion circuit supplies power to the wireless communication unit 7 via this power cable.

[0025] Case 20 is formed into a rectangular box shape with an open bottom by bending a metal plate, such as a galvanized steel plate. The printed circuit board on which the numerous circuit components of the power supply block are mounted is screw-fastened to the underside of the top plate of case 20. The output cable of the power supply block is routed from the open bottom of case 20 through a through-hole provided in the center of the top plate 41 of the holding unit 4 and a through-hole provided in the center of the bottom plate 42 of the holding unit 4 into the light source unit 1. In other words, the output cable of the power supply block extends almost straight downward from the open bottom of case 20 toward the light source unit 1. The output cable of the power supply block is then electrically connected to the receptacle connector of the light source unit 1 either directly or via another electrical cable.

[0026] Furthermore, a terminal block 21 is provided on the outer surface of the rear wall of the case 20. The terminal block 21 is electrically connected to the power supply block. Power lines (not shown) connected to an external power supply are connected to the terminal block 21. The terminal block 21 is connected to the power supply block located inside the case 20. The power supply block receives power from the external power supply via the terminal block 21 and the power lines.

[0027] (heat dissipation part) As shown in Figures 1 to 3, the heat dissipation section 3 is composed of multiple heat dissipation fins 31. The multiple heat dissipation fins 31 are fixed to the upper surface of the bottom plate 42. The multiple heat dissipation fins 31 are arranged in a radial pattern when viewed from above (see Figure 3).

[0028] Each heat dissipation fin 31 is formed from a material with excellent thermal conductivity, such as aluminum or an aluminum alloy. Each heat dissipation fin 31 is formed into a roughly U-shape by bending a single rectangular aluminum plate. Specifically, each heat dissipation fin 31 has a base portion 311 and a pair of heat dissipation plates 312. The pair of heat dissipation plates 312 are formed to extend upward from both ends of the base portion 311 in the left-right direction.

[0029] The base portion 311 is formed in the shape of a roughly trapezoidal plate. The base portion 311 is also provided with a plurality of boss holes that penetrate in the thickness direction. The plurality of boss holes are provided along the longitudinal direction of the base portion 311. The bottom plate 42 of the holding portion 4 has a plurality of bosses corresponding to the plurality of boss holes 313 of the base portion 311. Each heat dissipation fin 31 is fixed to the bottom plate 42 by crimping the bosses of the bottom plate 42 with the plurality of bosses of the bottom plate 42 inserted into the plurality of boss holes 313 of the base portion 311.

[0030] In this way, the heat dissipation section 3 is formed by bending each individual heat dissipation fin 31 and is fixed to the bottom plate 42 by crimping. Therefore, compared to, for example, the entire heat dissipation section 3 being integrally formed from aluminum die casting, the heat dissipation section 3 can be made smaller and lighter.

[0031] (holding part) As described above, the holding section 4 includes a top plate 41, a bottom plate 42, a pair of first support sections 43, and a pair of second support sections 44.

[0032] The top plate 41 is formed in a substantially rectangular shape from a metal plate such as aluminum or an aluminum alloy. The top plate 41 has connecting parts 41a formed at the front center and rear center, and connecting parts 41b formed at the left center and right center.

[0033] Each of the base plates 42 is formed in a substantially rectangular shape from a metal plate with excellent thermal conductivity, such as aluminum or an aluminum alloy. The base plates 42 have connecting portions 42a formed in the front center and rear center, and connecting portions 42b formed in the left center and right center.

[0034] The first support portion 43 and the second support portion 44 are formed, for example, by bending a single metal plate, such as a galvanized steel sheet.

[0035] The pair of first support parts 43 are arranged to face each other in the front-to-back direction. The first support parts 43 have connecting parts 43a and 43b formed at both the upper and lower ends. The connecting parts 43a and 43b are formed by bending the upper and lower ends of the first support parts 43. The first support parts 43 are connected by screws or the like, with the connecting part 43a being connected to the connecting part 41a of the top plate 41 and the connecting part 43b being connected to the connecting part 42a of the bottom plate 42.

[0036] A pair of second support parts 44 are arranged to face each other in the left-right direction. Each second support part 44 has a through hole 44a formed approximately in the center in the vertical direction. Each second support part 44 is connected to the connecting part 41b of the top plate 41 via the through hole 44a by a screw 51. Each second support part 44 also has a connecting part 44b formed at its lower end. The connecting part 44b is formed by bending the lower end of the second support part 44. The connecting part 44b of the second support part 44 is connected to the connecting part 42b of the bottom plate 42 by a screw or the like.

[0037] The top plate 41 and the bottom plate 42 are fixed in place by this pair of first support parts 43 and the pair of second support parts 44.

[0038] (Wireless Communication Department) The wireless communication unit 7 includes an antenna unit and a light-receiving element. The antenna unit and the light-receiving element are formed on a circuit board. The circuit board is, for example, a printed circuit board.

[0039] The antenna section is, for example, a wiring pattern of a predetermined shape formed on a circuit board. The antenna section performs wireless communication using radio waves as a medium; specifically, the antenna section is configured to be capable of transmitting and receiving radio waves. The antenna section receives communication signals via radio waves from an externally located communication device (not shown). The antenna section also transmits communication signals via radio waves to an externally located communication device.

[0040] A light-receiving element is a light-receiving element (such as a photodiode or phototransistor) that receives infrared light. The light-receiving element performs infrared communication using infrared light as the medium. Specifically, the antenna receives infrared communication signals from an externally located communication device.

[0041] Examples of the above-mentioned communication devices include dimming devices that control the dimming of the lighting fixture, and various sensors such as motion sensors.

[0042] As shown in Figures 1 to 3, the wireless communication unit 7 is located on the outside (rear side) of the first support unit 43. Specifically, the wireless communication unit 7 is located in the central part of the first support unit 43 in the vertical direction.

[0043] (arm) As shown in Figures 1 and 5, the arm 6 is formed in a U-shape by bending a long metal plate, such as a galvanized steel plate, at both ends in the longitudinal direction at approximately right angles in the same direction.

[0044] The arm 6 is attached to a pair of second support parts 44 (connecting parts) at both ends in the longitudinal direction. As shown in Figures 5 and 6, through holes 61 and slits 62 are formed at both ends in the longitudinal direction of the arm 6. The slits 62 are formed in an arc shape with the through hole 61 as the center, and the base end is angled 30° in the front-rear direction, with the intersection of the slit 62 and a straight line passing through the through hole 61 in the vertical direction as the reference point. The second support parts 44 also have screw holes 441 and 442 formed at positions corresponding to the through holes 61 and slits 62. The arm 6 and the second support parts 44 can be fixed together by fastening screws 52 to the screw holes 441 formed in the second support parts 44 through the through holes 61. Also, as shown in Figures 1 and 3, stepped screws 53 (second fastening members) are fastened to screw holes (not shown) formed in the second support parts 44 through the slits 62. When this stepped screw 53 is fastened into the screw hole of the second support part 44, the head of the stepped screw 53 comes into contact with the arm 6.

[0045] As described above, the arm 6 is connected to the second support part 44 by a screw 52. The first support part 43 has a connecting part 43a that is connected to connecting parts 41a formed at the front and rear centers of the top plate 41, and a connecting part 43b that is connected to connecting parts 42a formed at the front and rear centers of the bottom plate 42. The second support part 44 is connected to connecting parts 41b formed at the left and right centers of the top plate 41 via a through hole 44a, and a connecting part 44b that is connected to connecting parts 42b formed at the left and right centers of the bottom plate 42. This configuration ensures that the load balance of the lighting fixture is stable.

[0046] The lighting fixture of this embodiment is installed on the ceiling of a building by tightening nuts onto a pair of suspension bolts that are inserted through bolt insertion holes 63 in the arm 6. However, it is preferable that the lighting fixture of this embodiment is further supported by wires or the like so that it does not fall even if the arm 6 becomes detached from the suspension bolts.

[0047] (Regarding adjustment of the irradiation angle) In this embodiment, the illumination angle of the lighting fixture can be adjusted by changing the relative position of the lighting unit 10 with respect to the arm 6.

[0048] Specifically, as described above, a screw 52 is fastened to the screw hole of the second support part 44, fixing the arm 6 and the second support part 44. This fixes the relative position of the lighting unit 10 with respect to the arm 6.

[0049] To adjust the illumination angle, loosen the screw 52 and release the fixing between the arm 6 and the lighting unit 10. At this time, leave the screw 52 inserted into the second support part 44. This allows the stepped screw 53 to move along the slit 62 formed in the arm 6. In other words, the lighting unit 10 can rotate in the front-rear direction with the screw 52 as the pivot axis.

[0050] As described above, the slit 62 is formed in an arc shape with the through hole 61 as the center, and the base end of the slit 62 is 30° in both the front-rear and rear directions, with the intersection of the slit 62 and a straight line passing through the through hole 61 in the vertical direction as the reference point. As a result, when the lighting unit 10 rotates 30° forward (rear), the front end (rear end) of the slit 62 comes into contact with the stepped screw 53. Therefore, the rotation angle of the lighting unit 10 in the front-rear direction is restricted to 30° or less. The slit 62 and the stepped screw 53 constitute a rotation restricting part 8 that restricts the rotation of the lighting unit 10.

[0051] When the lighting unit 10 rotates, if the head of the stepped screw 53 and the edge of the slit 62 are in contact, frictional resistance can be added to the rotation of the lighting unit 10 relative to the arm 6. This allows the rotation speed of the lighting unit 10 to be slowed when adjusting the illumination angle of the lighting fixture, making it easier to adjust the illumination angle of the lighting fixture.

[0052] Then, the lighting unit 10 is rotated to position it at the desired illumination angle, and the screw 52 is tightened. This fixes the relative position of the lighting unit 10 with respect to the arm 6.

[0053] Thus, when adjusting the illumination angle of the lighting fixture, that is, when changing the relative position between the lighting unit 10 and the arm 6, all that is needed is to loosen the two screws 52 located on both the left and right sides of the lighting fixture. This makes it easier to adjust the illumination angle of the lighting fixture.

[0054] In this case, the screw 52 may be loosened and completely come out of the screw hole in the second support part 44. Even in this case, the lighting fixture is configured so that the stepped screw 53 catches on the slit 62. In other words, even if the screw 52 comes out when adjusting the irradiation direction of the lighting fixture, it is possible to prevent the lighting unit 10 from completely falling off the arm 6. Furthermore, since it is not necessary to loosen the stepped screw 53 that prevents detachment during installation, it is possible to reliably prevent the lighting unit 10 from falling off during installation.

[0055] As described above, the lighting fixture according to this embodiment comprises a lighting unit 10, an arm 6 that rotatably supports the lighting unit 10 via a screw 52 (rotating shaft), a second support part 44 (connecting part) that connects the lighting unit 10 and the arm 6, and a rotation restricting part 8 that restricts the rotation range of the lighting unit 10 relative to the arm 6. The rotation restricting part 8 has an arc-shaped slit 62 formed in the arm 6 centered on the screw 52, ​​and a stepped screw 53 (guide part) formed in the second support part 44 that is inserted into the slit 62. The lighting unit 10 rotates relative to the arm 6 by moving the stepped screw 53 along the slit 62, and the screw 53 serves as a first fastening member for fixing the lighting unit to the arm.

[0056] With this configuration, the lighting unit 10 can be fixed to the arm 6 by tightening the screw 52. By loosening the screw 52, ​​the stepped screw 53 can move along the slit 62, allowing the lighting unit 10 to rotate relative to the arm 6. In other words, with this lighting fixture, the illumination angle of the lighting fixture can be adjusted simply by loosening or tightening the screw 52, ​​without needing to loosen or tighten any other screws. Therefore, the ease of installation of the lighting fixture can be improved. Also, because the stepped screw 53 is inserted into the slit 62, even if the screw 52 comes loose, the stepped screw 53 will catch on the slit 62. This prevents the lighting unit 10 from completely falling off the arm 6.

[0057] Furthermore, the stepped screw 53 has its head in contact with the slit 62. This adds frictional resistance to the rotation of the lighting unit, thereby reducing the sliding between the arm 6 and the lighting unit 10, and making it easier to adjust the illumination angle of the lighting fixture.

[0058] [Embodiment 2] Figure 7 shows a lighting fixture according to Embodiment 2. In the following description, parts common to Embodiment 1 are denoted by the same reference numerals, and their detailed descriptions are omitted. Embodiment 2 differs from Embodiment 1 in the configuration of the second support part 44, but the other configurations are the same as those of Embodiment 1.

[0059] (Second connection point) In Embodiment 2, a pair of second connecting parts 44' are provided instead of a pair of second support parts 44. As shown in Figure 7, the pair of second connecting parts 44' are provided so as to face each other in the left-right direction on the top plate 41. These second connecting parts 44' are rectangular plate-shaped members that extend in the vertical direction. Both the front and rear ends of the second connecting parts 44' are bent inward toward the top plate 41. The lower end of the second connecting part 44' is screwed to the connecting part 41b.

[0060] A screw hole is provided at the upper end of the second connecting portion 44'. This screw hole and the through hole 61 of the arm 6 are fastened together by a screw 52.

[0061] In the second embodiment, the same effects as in the first embodiment can be obtained.

[0062] (Other embodiments) As described above, embodiments have been explained as examples of the technology disclosed in this application. However, the technology in this disclosure is not limited thereto and can be applied to embodiments that are modified, replaced, added, or omitted as appropriate.

[0063] In the above embodiments, the second support portion 44 and the second connecting portion 44' were configured separately from the lighting unit 10. However, the invention is not limited to this configuration, and the top plate 41 and / or bottom plate 42 may be integrally formed with the second support portion 44 and the second connecting portion 44'.

[0064] In the embodiments described above, the first fastening member and the pivot shaft were described as screws 52, and the guide portion was a stepped screw 53. However, the first fastening member and the guide portion may be screws 52, and the pivot shaft may be a stepped screw 53. In this case, the lighting unit 10 rotates relative to the arm 6 as the screw 52 moves along the slit 62. Furthermore, the lighting unit 10 is fixed to the arm 6 by fastening the screw 52. In addition, frictional resistance can be added to the rotation of the lighting unit 10 by the stepped screw 53 (second fastening member) of the pivot shaft. Note that the lighting unit 10 can be fixed to the arm 6 by using a normal screw instead of a stepped screw 53.

[0065] In each of the embodiments described above, a stepped screw 53 was used as the guide portion. However, it is not limited to this, and any object that is inserted through the slit 62 may be used. For example, the guide portion may be a pin-shaped projection protruding from the second support portion 44. In this case, the projection may be integrally formed with the second support portion 44 or the arm 6 and the guide portion. That is, the guide portion only needs to be able to restrict the rotation of the lighting unit 10 by having a portion inserted into the slit 62.

[0066] In each of the above embodiments, the slit 62 was formed in the arm 6, and the stepped screw 53, which serves as a guide, was provided on the second support portion 44. However, the embodiment is not limited to this; the slit 62 may be formed in the second support portion 44, and the stepped screw 53 may be provided on the arm 6. In other words, it is sufficient if the slit 62 is formed in either the second support portion 44 or the arm 6, and the stepped screw 53 (guide portion) is formed in the other. [Explanation of symbols]

[0067] 1 Light source unit 2 Power supply units 3 Heat dissipation part 4 Holding part 41 Top plate 42 Bottom plate 43 1st support part 44 Second support part 6 Arms 52 Screw (rotating shaft, first fastening member) 53 Stepped screw (guide part, second fastening member)

Claims

1. A lighting unit having a base plate to which a light source is attached, and a top plate positioned opposite the base plate, The lighting unit is supported by an arm that allows it to rotate via a pivot shaft, A connecting part that connects the lighting unit and the arm, It includes a rotation restricting unit that restricts the rotation range of the lighting unit relative to the arm, The aforementioned rotation restricting unit is An arc-shaped slit formed in either the connecting portion or the arm, centered on the pivot axis, It has a guide portion formed on either the connecting portion or the arm and inserted into the slit, The lighting unit rotates relative to the arm by moving the guide portion along the slit. A first fastening member for fixing the lighting unit to the arm is provided on either the pivot shaft or the guide portion, The aforementioned connection part is a lighting fixture connected to the side of the top plate.

2. The aforementioned lighting unit is A base plate to which the light source is attached, It has a top plate positioned opposite the bottom plate, The lighting fixture according to claim 1, wherein the connecting portion is provided on the top plate.

3. The lighting fixture according to claim 2, wherein the connecting portion is formed integrally with the top plate.

4. The aforementioned lighting unit is A base plate to which the light source is attached, It has a top plate positioned opposite the bottom plate, The lighting fixture according to claim 1, wherein the connecting portion is provided on the bottom plate.

5. The lighting fixture according to claim 4, wherein the connecting portion is formed integrally with the bottom plate.

6. The lighting fixture according to any one of claims 2 to 5, wherein the top plate and the bottom plate are joined by the connecting part.

7. The lighting fixture according to any one of claims 1 to 6, characterized in that the guide portion is a protruding portion integrally formed with either the connecting portion or the arm.

8. A second fastening member that can be tightened or loosened is provided on either the pivot shaft or the guide portion. The lighting fixture according to any one of claims 1 to 7, characterized in that frictional resistance is added to the rotation of the lighting unit by fastening the second fastening member.

9. The lighting fixture according to claim 8, characterized in that the second fastening member is a stepped screw.

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