Plug unit and lighting device

Abstract

To provide a plug unit 4 which provides flexibility to the layout in an attachment device 3 attached to a lighting duct 10.SOLUTION: A plug unit 4 according to the invention includes a housing 41, a protruding part 43, an operation part 44, and a support part 50. The housing 41 is supported by a lighting duct 10. The protruding part 43 engages with the lighting duct 10 in the lighting duct 10. The operation part 44 causes the protruding part 43 to protrude from the inside of the housing 41 to the outside. The support part 50 supports an attachment device 3 attached to the lower side of the housing 41 in a manner that allows the attachment device 3 to rotate around a rotation axis extending in a vertical direction.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to a plug unit and a lighting fixture. [Background technology]

[0002] Patent Document 1 discloses a lighting fixture attached to a lighting duct. In this lighting fixture, a fixture body is detachably attached to the lighting duct. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-214470 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the fixture body described in Patent Document 1 is attached in a direction extending along the lighting duct. For this reason, there has been a demand for a support structure that provides freedom in layout for a fixture that is attached to a lighting duct, such as a lighting fixture.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a plug unit and a lighting fixture that can provide freedom in the layout of a mounting fixture to be attached to a lighting duct. [Means for solving the problem]

[0006] The plug unit disclosed in the present application comprises a housing, a protrusion, an operating part, and a support part. The housing is supported by a lighting duct. The protrusion engages with the lighting duct inside the lighting duct. The operating part causes the protrusion to protrude from the inside of the housing to the outside. The support part supports a mounting device attached below the housing so that the mounting device can rotate freely around a rotation axis extending in the vertical direction.

[0007] In the plug unit disclosed in the present application, the support portion preferably includes a support bolt, a spacer, and a support nut. The support bolt is disposed coaxially with the rotation shaft. The spacer is disposed between the housing and the mounting device. The support nut is fixed to the support bolt.

[0008] In the plug unit disclosed in the present application, it is preferable that the head of the support bolt has an outer circumferential edge such that the distance from the rotation shaft varies depending on the position in a plan view.

[0009] In the plug unit disclosed in the present application, the support bolt is preferably hollow.

[0010] In the plug unit disclosed in the present application, it is preferable that a stopper is provided on the upper surface of the mounting device, and the spacer rotates around the rotation axis together with the mounting device and engages with the stopper to regulate the rotation range of the mounting device.

[0011] In the plug unit disclosed in the present application, it is preferable that a boss protruding downward is provided on the lower surface of the housing, and displacement of the spacer around the rotation axis is restricted by the boss.

[0012] In the plug unit disclosed in the present application, it is preferable that the housing extends in a longitudinal direction LG along the lighting duct, and includes a first plug portion, a second plug portion, a first operation portion, and a second operation portion. The first plug portion supplies power to the mounting device. The second plug portion supplies a control signal to the mounting device. The first operation portion is attached to one end of the housing. The second operation portion is attached to the other end of the housing.

[0013] The lighting fixture disclosed in the present application preferably includes the plug unit, a power source, and a light body. The plug unit is supported by a long lighting duct. The power source is attached to the plug unit at one end in the longitudinal direction LG by the support. The light body is attached to the power source.

[0014] The lighting device disclosed in the present application preferably further includes a fixing part that fixes an end of the power source on the other side in the longitudinal direction LG to the lighting duct. Effect of the Invention

[0015] According to the plug unit and lighting fixture of the present invention, it is possible to provide freedom in the layout of the mounting fixture to be attached to the lighting duct. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view showing a state in which a lighting fixture according to a first embodiment of the present invention is attached to a lighting duct. [Diagram 2] 2 is a view of the lighting fixture shown in FIG. 1 taken along line II-II. [Diagram 3] Fig. 3(a) is a perspective view of the plug unit from one direction, Fig. 3(b) is a perspective view of the plug unit 4 from another direction, and Fig. 3(c) is a bottom view of the plug unit. [Figure 4] 4 is a cross-sectional view taken along line IV-IV in FIG. 2. [Diagram 5]5 is an exploded perspective view of the periphery of the support portion shown in FIG. 4. [Figure 6] Fig. 6(a) is a diagram showing a state in which the power supply and the plug unit extend in the same direction, and Fig. 6(b) is a diagram showing a state in which the power supply has been rotated relative to the plug unit. [Figure 7] FIG. 2 is a perspective view of a fixing portion shown in FIG. [Figure 8] FIG. 8 is an exploded perspective view of the fixing portion shown in FIG. [Figure 9] 2 is a diagram showing a state in which the lighting fixture shown in FIG. 1 is attached to a lighting duct. FIG. [Figure 10] 10 is a diagram showing a state in which the power supply is rotated in the lighting fixture shown in FIG. 9. FIG. [Figure 11] FIG. 11 is a front view of a fixing part in a lighting fixture according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are given the same reference symbols and the description will not be repeated. In addition, in the drawings, the X-axis, Y-axis, and Z-axis of a three-dimensional orthogonal coordinate system are appropriately described for ease of understanding. The X-axis and Y-axis are parallel to the horizontal direction, and the Z-axis is parallel to the vertical direction. The positive direction of the Z-axis indicates the upward direction, and the negative direction of the Z-axis indicates the downward direction.

[0018] (1) Overall structure A lighting fixture 1 according to an embodiment of the present invention will be described with reference to Fig. 1. Fig. 1 is a perspective view showing a state in which the lighting fixture 1 is attached to a lighting duct 10. As shown in Fig. 1, the lighting fixture 1 is attached to the lighting duct 10.

[0019] The lighting duct 10 is a rail-shaped wiring device having a long rectangular parallelepiped shape. In the following description, the direction in which the lighting duct 10 extends is referred to as the longitudinal direction LG. Also, the direction perpendicular to the longitudinal direction LG in a plan view is referred to as the width direction W. In this embodiment, the longitudinal direction LG is parallel to the X-axis constituting the horizontal plane, and the width direction W is parallel to the Y-axis constituting the horizontal plane.

[0020] (2) Configuration of lighting duct 10 Next, the configuration of the lighting duct 10 will be described with reference to Fig. 2. Fig. 2 is a view taken along line II-II of the lighting fixture 1 shown in Fig. 1. As shown in Fig. 2, the lighting duct 10 includes a rail 11, a conductive part 12, a signal transmission part 13, and a holder 14.

[0021] The rail 11 is made of a lightweight metal material such as aluminum. The rail 11 is a hollow, elongated member. A groove opening downward is formed in the rail 11. The rail 11 is formed by extrusion molding, and has a uniform cross-sectional shape over the entire area in the longitudinal direction LG. The rail 11 opens toward both sides in the longitudinal direction LG. End caps (not shown) may be attached to both ends of the rail 11 in the longitudinal direction LG.

[0022] The conductive part 12 is formed of a conductive wire. The conductive part 12 is connected to a distribution board (not shown) and transmits power supplied from the distribution board to the plug unit 4. In the structure shown in FIG. 2, two pairs of positive and negative electrodes are arranged inside the lighting duct 10.

[0023] The signal transmission unit 13 is formed of a conductive wire. The signal transmission unit 13 transmits, for example, to the plug unit 4 a control signal for controlling the light body 2 and the power source 3 attached to the plug unit 4.

[0024] The holder 14 is made of an insulating synthetic resin material. The holder 14 has a uniform cross-sectional shape over the entire area in the longitudinal direction LG. The holder 14 covers the conductive portion 12 and the signal transmission portion 13 over the entire area in the longitudinal direction LG. The holder 14 holds the conductive portion 12 and the signal transmission portion 13 inside the rail 11 and electrically isolates them from each other.

[0025] (3) Configuration of lighting fixture 1 Next, the configuration of the lighting fixture 1 will be described with reference to Fig. 2. As shown in Fig. 2, the lighting fixture 1 includes a light body 2, a power source 3, a plug unit 4, and a fixing part 60. The power source 3 and the light body 2 are an example of a mounting fixture. A mounting fixture is a fixture that is attached to a lighting duct 10 for use. The mounting fixture includes various fixtures to which power is supplied by the power supply function of the lighting duct 10.

[0026] (3-2) Light body 2 Next, the configuration of the light body 2 will be described with reference to Fig. 2. The light body 2 is a lighting device. The light body 2 is attached to a power source 3. The light body 2 in this embodiment is a spotlight. The light body 2 includes a light source 20, a reflector 21, a cover 22, and a connecting arm 23.

[0027] The light source 20 emits light using power supplied from the power source 3. The light source 20 is disposed inside the cover 22 of the lamp body 2. Light generated from the light source 20 is irradiated to the outside of the lamp body 2. The light source 20 has, for example, an LED (Light Emitting Diode) element as a light emitting element. The light source 20 is, for example, an SMD (surface mount device) or a COB (chip on board).

[0028] The reflector 21 covers the front of the light source 20 in the irradiation direction, and collects the light emitted from the light source 20 in one direction. The cover 22 is cylindrical and has an opening facing the irradiation direction.

[0029] The connecting arm 23 connects the cover 22 and the power source 3. The cover 22 is supported by the connecting arm 23 so as to be freely tiltable relative to the power source 3. The light body 2 is supported so as to be freely rotatable about the connecting arm 23 as a rotation axis. Therefore, the user can change the irradiation direction of the light body 2 by adjusting the orientation of the cover 22.

[0030] (3-1) Power supply 3 Next, the configuration of the power source 3 will be described with reference to Fig. 2. As shown in Fig. 2, one end of the power source 3 in the longitudinal direction LG is attached to the plug unit 4. The power source 3 is a unit that supplies power to the light body 2. The power source 3 includes a case 30 and a drive circuit (not shown).

[0031] The case 30 has a rectangular parallelepiped shape. The drive circuit is housed inside the case 30. The drive circuit generates a DC drive voltage to be input to the light source 20 based on the power and control signal supplied via the plug unit 4.

[0032] The case 30 includes a case body 31 and a lid 32. The case body 31 has a rectangular parallelepiped shape that opens upward. The lid 32 is a flat plate member, and is detachably attached to the case body 31 by a mounting screw .

[0033] A communication hole 33 (see FIG. 5) is provided on the upper surface of the lid 32. The communication hole 33 passes through the lid 32 in the vertical direction.

[0034] A stopper 35 (see FIG. 5) is provided on the top surface of the lid 32 of the case 30. The stopper 35 is a screw, and is attached to a screw hole provided in the lid 32. The stopper 35 restricts the rotation range of the case 30 when the case 30 of the power source 3 rotates relative to the plug unit 4. The function of the stopper 35 will be described in detail later.

[0035] (3-3) Plug unit 4 Next, the configuration of the plug unit 4 will be described with reference to Fig. 3. Fig. 3 is an external view of the plug unit 4 shown in Fig. 1. Of these, Fig. 3(a) is a perspective view of the plug unit 4 from one direction. Fig. 3(b) is a perspective view of the plug unit 4 from the other direction. Fig. 3(c) is a bottom view of the plug unit 4. As shown in Fig. 3(a), the plug unit 4 includes a housing 41, a plug portion 42, a protruding portion 43, an operating portion 44, and a support portion 50.

[0036] (3-3-1) Cabinet 41 The housing 41 extends in the longitudinal direction LG along the lighting duct 10. The housing 41 has a rectangular parallelepiped shape with an upper part smaller in the width direction W than a lower part compared to a vertical center part. The housing 41 is made of a synthetic resin material. When the plug unit 4 is attached to the lighting duct 10, the housing 41 is supported by the lighting duct 10.

[0037] 3(c), a through hole 41A is formed on the bottom surface of the housing 41. The through hole 41A passes through the bottom surface of the housing 41 in the up-down direction and is disposed coaxially with the rotation axis Ax1 of the case 30 relative to the plug unit 4. The through hole 41A is disposed in the center of both the longitudinal direction LG and the width direction W on the bottom surface of the housing 41.

[0038] A positioning boss 41B is further provided on the bottom surface of the housing 41. The positioning boss 41B has a rectangular shape when viewed from below. The positioning boss 41B is disposed on the bottom surface of the housing 41 in the vicinity of the through-hole 41A.

[0039] 3(a) and 3(b), a plurality of openings 41C are formed on the side surface of the housing 41. A plurality of plug portions 42 and an operation portion 44 are exposed from the openings 41C. A protrusion 43, which will be described later, is accommodated inside the housing 41 so as to be able to protrude from the opening 41C toward the outside of the housing 41.

[0040] (3-3-2) Plug part 42 The plug section 42 is housed inside the housing 41 and is a conductive member that transmits power and control signals from the lighting duct 10 to the power source 3. The plug section 42 includes a first plug section 42A and a second plug section 42B. The first plug section 42A supplies power to the power source 3. The second plug section 42B supplies a control signal to the power source 3.

[0041] 3(a), the first plug portion 42A is disposed on one side (left side) in the longitudinal direction LG, and the second plug portion 42B is disposed on the other side (right side) in the longitudinal direction LG inside the housing 41. The positions of the first plug portion 42A and the second plug portion 42B may be changed.

[0042] (3-3-3) Protrusion 43 The protrusion 43 supports the plug unit 4 on the lighting duct 10 by protruding from inside the housing 41 to the outside in response to an operation on the operating portion 44. As shown in Fig. 2, the protrusion 43 protrudes from both sides of the outer surface of the housing 41 in the width direction W toward the outside of the housing 41. The protrusion 43 engages with the lighting duct 10 inside the lighting duct 10.

[0043] 3(a) and 3(b), the protrusion 43 includes a first protrusion 43A and a second protrusion 43B. The first protrusion 43A is disposed inside the housing 41 and adjacent to the first plug portion 42A. The second protrusion 43B is disposed inside the housing 41 and adjacent to the second plug portion 42B.

[0044] (3-3-4) Operation unit 44 The operation portion 44 is used to attach and detach the protrusion 43 to and from the housing 41. The operation portion 44 is a lever member. The operation portion 44 includes a first operation portion 44A and a second operation portion 44B.

[0045] The first operating part 44A is attached to one end of the housing 41. The first operating part 44A is rotatable along a horizontal plane. When the user performs an operation to rotate the first operating part 44A, the first protruding part 43A housed inside the housing 41 can be protruded toward the outside.

[0046] The second operating part 44B is attached to the other end of the housing 41. The second operating part 44B is rotatable along a horizontal plane. When the user rotates the second operating part 44B, the second protruding part 43B housed inside the housing 41 can be protruded toward the outside of the housing 41. That is, by operating the first operating part 44A and the second operating part 44B, the housing 41 can be firmly attached to the lighting duct 10 by the first protruding part 43A and the second protruding part 43B.

[0047] (3-3-5) Support part 50 Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 2. In this figure, the structure inside the housing 41 is omitted from the illustration except for the periphery of the support part 50. As shown in Fig. 4, the support part 50 supports the power source 3 attached to the lower part of the housing 41 so as to be rotatable about a rotation axis Ax1 extending in the vertical direction. This allows freedom in the layout of the power source 3 and the light body 2 attached to the lighting duct 10. In the following description, the direction going around the rotation axis Ax1 is referred to as the circumferential direction.

[0048] Fig. 5 is an exploded perspective view of the support part 50 and its periphery shown in Fig. 4. For ease of explanation, in this figure, the support bolt 51 housed inside the housing 41 of the plug unit 4 is illustrated as being disposed outside the housing 41. As shown in Figs. 4 and 5, the support part 50 includes the support bolt 51, a support nut 52, and a spacer 53.

[0049] The support bolt 51 is disposed coaxially with the rotation axis Ax1 inside the housing 41. The support bolt 51 includes a head portion 51A and a shaft portion 51B. The support bolt 51 is hollow and has a polygonal shape in a plan view. As shown in Fig. 5, in this embodiment, the head portion 51A has an octagonal shape in a plan view.

[0050] That is, the distance from the rotation axis Ax1 to the outer periphery of the head 51A of the support bolt 51 varies depending on the position in a plan view. As shown in Fig. 4, the head 51A is placed on the bottom surface of the housing 41 inside the housing 41. The outer periphery of the support bolt 51 abuts against the inner wall surface of the housing 41 in the longitudinal direction LG. Therefore, the relative displacement of the support bolt 51 in the circumferential direction with respect to the housing 41 is restricted.

[0051] A male thread is formed on the outer peripheral surface of the shaft portion 51B of the support bolt 51. The shaft portion 51B of the support bolt 51 is inserted into the through hole 41A of the housing 41 of the plug unit 4. Various conductors (not shown) that connect the plug unit 4 and the power source 3 can be arranged in the hollow portion of the support bolt 51. A support nut 52 is attached to the lower end portion of the shaft portion 51B of the support bolt 51.

[0052] The support nut 52 is a nut member having an internal thread formed on its inner circumferential surface, the internal thread corresponding to the external thread of the support nut 52. The support nut 52 is housed inside the case 30 of the power source 3. The support nut 52 is attached to the shaft portion 51B of the support bolt 51, whereby the housing 41 of the plug unit 4 and the case 30 of the power source 3 are connected via the spacer 53. Then, by connecting the power source 3 and the plug unit 4 by the support bolt 51 and the support nut 52 with the spacer 53 interposed therebetween, the power source 3 can be displaced relative to the housing 41 of the plug unit 4 in the circumferential direction.

[0053] As shown in Fig. 4 and Fig. 5, the spacer 53 is a plate-like member disposed between the housing 41 and the power source 3. Fig. 6 is a plan view for explaining the attached state of the spacer 53. Of these, Fig. 6(a) is a diagram showing a state in which the power source 3 and the plug unit 4 extend in the same direction. Fig. 6(b) is a diagram showing a state in which the power source 3 has been rotated with respect to the plug unit 4. In these figures, for ease of explanation, the outer shape of the housing 41 in the plug unit 4 is shown by a two-dot chain line.

[0054] As shown in Fig. 6, the spacer 53 has a generally rectangular shape in a plan view. An insertion hole 53A through which the shaft portion 51B of the support nut 52 is inserted is formed in the center of the spacer 53 in a plan view. As shown in Fig. 4, the spacer 53 is disposed so as to be coaxial with the through hole 41A of the housing 41.

[0055] 6(a), a first restricting edge 53B facing one side in the circumferential direction and a second restricting edge 53C facing the other side in the circumferential direction are formed on the outer circumferential edge of the spacer 53. A portion of the outer circumferential edge of the spacer 53 connecting the first restricting edge 53B and the second restricting edge 53C forms an arc shape coaxial with the periphery of the insertion hole 53A.

[0056] The spacer 53 is positioned in the circumferential direction with respect to the housing 41 of the plug unit 4. The peripheral portion of the spacer 53 abuts in the circumferential direction against a positioning boss 41B formed on the lower surface of the housing 41. As a result, the positioning boss 41B restricts the spacer 53 from being displaced relative to the housing 41 around the rotation axis Ax1. This makes it possible to suppress the spacer 53 from rotating in accordance with the rotation of the power source 3.

[0057] Next, the rotational movement of the power source 3 about the rotation axis Ax1 will be described. As shown in Fig. 6(a) and Fig. 6(b), the power source 3 rotates about the rotation axis Ax1 relative to the plug unit 4 in response to a user's operation. At this time, the spacer 53 is not displaced in the circumferential direction because the circumferential displacement is restricted by the positioning boss 41B of the housing 41.

[0058] The spacer 53 interferes with the stopper 35 attached to the cover 32 of the power source 3, thereby restricting the rotation range of the power source 3. That is, the rotation range of the power source 3 is from the position where the stopper 35 contacts the first restriction edge 53B of the spacer 53, as shown in Fig. 6(a), to the position where the stopper 35 contacts the second restriction edge 53C, as shown in Fig. 6(b). As a result, the rotation range of the power source 3 is increased, and the support bolt 51 and the support nut 52 can be prevented from loosening.

[0059] (3-4) Fixed part 60 1 is a member that fixes the other end of the power source 3 in the longitudinal direction LG to the lighting duct 10. This allows the power source 3 to be attached to the lighting duct 10 more firmly.

[0060] The configuration of the fixing part 60 will be described with reference to Fig. 7 and Fig. 8. Fig. 7 is a perspective view of the fixing part 60 shown in Fig. 1. Fig. 8 is an exploded perspective view of the fixing part 60 shown in Fig. 7. As shown in Figs. 7 and 8, the fixing part 60 includes a rail engagement part 61, a collar member 62, an operating lever 63, a mounting base 64, a mounting screw 65, and a lock lever 66.

[0061] The rail engagement portion 61 is a plate-like member having a generally rectangular shape having long sides and short sides in a plan view. A long hole 61A extending along the long side is formed in the center of the rail engagement portion 61 in a plan view. The rail engagement portion 61 rotates around the central axis Ax2 of the mounting screw 65 in response to the operation of the operating lever 63.

[0062] The dimension of the rail engagement portion 61 in the direction along the long side is larger than the width dimension of the groove of the rail 11 of the lighting duct 10. On the other hand, the dimension of the rail engagement portion 61 in the direction along the long side is smaller than the width dimension of the groove of the rail 11 of the lighting duct 10. For this reason, the rail engagement portion 61 can be detachably engaged with the rail 11 by rotating about the central axis Ax2 to change its orientation while being disposed inside the groove of the rail 11.

[0063] The collar member 62 has a multi-stage cylindrical shape with an outer diameter that decreases toward the top. As shown in Fig. 8, the small diameter cylindrical portion 62A located at the top of the collar member 62 has a shape that corresponds to the long hole 61A of the rail engagement portion 61. The small diameter cylindrical portion 62A is inserted into the long hole 61A, whereby the small diameter cylindrical portion 62A and the rail engagement portion 61 are combined. Since the small diameter cylindrical portion 62A and the long hole 61A are engaged in the circumferential direction, the rail engagement portion 61 rotates about the central axis Ax2 in accordance with the rotation of the collar member 62 about the central axis Ax2.

[0064] As shown in Fig. 7 and Fig. 8, the operating lever 63 is a plate-like member extending horizontally with its front and back surfaces facing up and down. A bent portion 63A is formed at the end of the operating lever 63, which is bent so that its front and back surfaces face horizontally. As shown in Fig. 8, the operating lever 63 rotates around the central axis Ax2 in response to a user's operation of the bent portion 63A. A mounting hole 63B is formed in the operating lever 63.

[0065] The mounting base 64 is a member attached to the case 30 of the power source 3. The mounting base 64 is attached to the upper surface of the lid 32 of the case 30. The mounting base 64 has a rectangular parallelepiped shape that opens to one side in the longitudinal direction LG and downward. Flanges 64A used for mounting to the lid 32 are formed on both ends of the mounting base 64 in the width direction W. Mounting holes 64B are formed on the upper surface of the mounting base 64.

[0066] A slit 64C extending in the longitudinal direction LG is formed at an end portion in the longitudinal direction LG of the upper surface of the mounting base 64. A restricting piece 66D of the lock lever 66, which will be described later, is housed inside the slit 64C.

[0067] The mounting screw 65 is a member for attaching the rail engagement portion 61, the collar member 62, and the operating lever 63 to the mounting base 64. A nut 65B is attached to the lower end of the mounting screw 65.

[0068] The lock lever 66 is a lock mechanism that restricts the user from operating the operating lever 63. As shown in Fig. 8, the lock lever 66 includes a lever body 66A, an attachment portion 66B, a release operation piece 66C, and a restriction piece 66D. The lever body 66A, the attachment portion 66B, the release operation piece 66C, and the restriction piece 66D are integrally formed with one another.

[0069] The lever body 66A is a plate material extending in the longitudinal direction LG with the front and back surfaces facing up and down. The other end of the lever body 66A is bent to form a mounting portion 66B. A mounting hole 66E is formed in the mounting portion 66B. A mounting screw 67 is inserted into the mounting hole 66E to fix the mounting portion 66B to the inner surface of the mounting base 64. As a result, with the end of the lever body 66A in the longitudinal direction LG fixed, it acts as a leaf spring that displaces up and down with the mounting portion 66B as a fulcrum.

[0070] The release operation piece 66C is formed at one end of the lever body 66A in the longitudinal direction LG. The front and back surfaces of the release operation piece 66C face the up-down direction. When the user presses the release operation piece 66C downward, the end of the lever body 66A in the longitudinal direction LG is displaced downward against the upward biasing force of the leaf spring.

[0071] The restricting piece 66D is formed on the upper surface of one end of the lever main body 66A in the longitudinal direction LG. The restricting piece 66D has its front and back surfaces facing the width direction W and protrudes upward from the upper surface of the lever main body 66A. As shown in FIG. 7, the restricting piece 66D is accommodated inside the slit 64C of the mounting base 64.

[0072] The restricting piece 66D faces the outer circumferential edge of the operating lever 63 in the longitudinal direction LG. Therefore, when the lock lever 66 is not operated, the outer circumferential edge of the operating lever 63 interferes with the restricting piece 66D when the operating lever 63 is rotated, thereby restricting the rotation of the operating lever 63. On the other hand, when the release operating piece 66C of the lock lever 66 is operated to displace the restricting piece 66D downward as described above, the operating lever 63 no longer faces the restricting piece 66D in the longitudinal direction LG, and therefore the restriction on the rotation of the operating lever 63 by the restricting piece 66D is released.

[0073] (4) Attachment and detachment to lighting duct 10 Next, the operation of attaching and detaching the lighting fixture 1 to and from the lighting duct 10 will be described with reference to Fig. 9 and Fig. 10. Fig. 9 is a diagram showing a state in which the lighting fixture 1 shown in Fig. 1 is attached to the lighting duct 10. Fig. 10 is a diagram showing a state in which the power source 3 is rotated in the lighting fixture 1 shown in Fig. 9.

[0074] (4-1) Installation to lighting duct 10 First, the installation work of the lighting fixture 1 to the lighting duct 10 will be described. First, the lighting fixture 1 is shipped as a unit in which the light body 2, the power source 3, and the plug unit 4 are combined, and distributed in the market. In the assembly work of the lighting fixture 1, an assembly worker connects the housing 41 of the plug unit 4 and the lid 32 of the case 30 with a support bolt 51 and a support nut 52 to the lid 32 of the power source 3 with a spacer 53 interposed therebetween. After that, the assembly worker attaches the lid 32 to the case body 31 to which the light body 2 is connected, thereby completing the lighting fixture 1. Note that the plug unit 4 may be distributed in the market as a single unit.

[0075] Next, in the installation work of the lighting fixture 1 to the lighting duct 10, the user installs the plug unit 4 of the lighting fixture 1 to the lighting duct 10. Specifically, the direction in which the power source 3 and the light body 2 extend relative to the plug unit 4 is changed (see FIG. 6). That is, the power source 3 and the light body 2 are rotated clockwise in a plan view relative to the plug unit 4. At this time, as shown in FIG. 6(b), the stopper 35 attached to the lid 32 of the case 30 abuts against the second restriction edge 53C of the spacer 53, thereby restricting the rotation range of the power source 3.

[0076] Next, the user places the plug unit 4 inside the lighting duct 10. Specifically, as shown in Fig. 9, the upper part of the housing 41 of the plug unit 4 is inserted into the groove of the lighting duct 10. At this time, the plug unit 4 is held relative to the lighting duct 10 in a state where the plug unit 4 is in contact with the lower end of the lighting duct 10. Note that the position of the longitudinal direction LG of the lighting duct 10 at this time can be set arbitrarily.

[0077] Next, the user operates the operation part 44 of the plug unit 4. Specifically, the user rotates the first operation part 44A of the plug unit 4 in the horizontal direction. As a result, the first protrusion 43A housed inside the housing 41 of the plug unit 4 protrudes toward the outside of the housing 41. As a result, the first protrusion 43A comes into contact with the edge of the groove of the rail 11 in the vertical direction inside the lighting duct 10, as shown in FIG.

[0078] The user further rotates the second operation portion 44B of the plug unit 4 in the horizontal direction. As a result, the second protruding portion 43B housed inside the housing 41 of the plug unit 4 protrudes toward the outside of the housing 41. As a result, the second protruding portion 43B comes into contact with the edge of the groove of the rail 11 in the vertical direction inside the lighting duct 10.

[0079] 9, the direction in which the light body 2 and the power source 3 extend is different from the direction in which the lighting duct 10 extends. Therefore, an operating space for operating the operating part 44 can be secured below the plug unit 4, and the workability of attaching the plug unit 4 to the lighting duct 10 can be improved.

[0080] Next, the user rotates the power source 3 and the light body 2 relative to the plug unit 4. At this time, the power source 3 and the light body 2 are rotated counterclockwise on a plane relative to the plug unit 4. As a result, the extension direction of the power source 3 and the light body 2 coincides with the extension direction of the plug unit 4, as shown in FIG.

[0081] Next, the user attaches the fixing part 60 to the lighting duct 10. In the state shown in FIG. 10, the user places the rail engagement part 61 of the fixing part 60 inside the lighting duct 10. Specifically, the rail engagement part 61 of the fixing part 60 is inserted into the groove of the lighting duct 10 with the long side oriented along the longitudinal direction LG. At this time, the fixing part 60 holds the plug unit 4 relative to the lighting duct 10 with the fixing part 60 in contact with the lower end of the lighting duct 10.

[0082] Next, the user engages the rail engagement portion 61 with the rail 11 of the lighting duct 10. Specifically, the user operates the lock lever 66 of the fixing portion 60, and rotates the operating lever 63 while keeping the restricting piece 66D of the lock lever 66 displaced downward.

[0083] As a result, the rail engagement part 61 rotates in conjunction with the rotation of the operating lever 63. At this time, as shown in Fig. 7, the long side of the rail engagement part 61 coincides with the width direction W, and the end part on the long side of the rail engagement part 61 vertically engages with the rail 11 of the lighting duct 10. As a result, the fixing part 60 is attached to the rail 11, and the power source 3 is fixed to the lighting duct 10.

[0084] Thereafter, the user adjusts the orientation of the cover 22 of the light body 2 so that the light from the light source 20 is emitted in a desired direction. With the above, the installation work of the lighting fixture 1 in the lighting duct 10 is completed.

[0085] (4-2) Removal from lighting duct 10 Next, a description will be given of the operation of removing the lighting fixture 1 from the lighting duct 10. The operation of removing the lighting fixture 1 from the lighting duct 10 is carried out by performing the above-mentioned mounting operation steps in reverse order.

[0086] Specifically, the user first operates the lock lever 66 of the fixed part 60. At this time, the user presses the release operation piece 66C of the lock lever 66 shown in FIG. 7 downward to release the restriction on the rotation of the operation lever 63 by the restriction piece 66D. After that, the user rotates the operation lever 63 to change the orientation of the rail engagement part 61 so that the long side faces the longitudinal direction LG. Then, the user removes the fixed part 60 from the rail 11 of the lighting duct 10.

[0087] Next, the user rotates the power source 3 and the light body 2 clockwise in a plan view relative to the plug unit 4 to the state shown in FIG. 9. After that, the user operates the first operating part 44A and the second operating part 44B of the plug unit 4 to house the first protruding part 43A and the second protruding part 43B inside the housing 41 of the plug unit 4. Then, the user removes the housing 41 of the plug unit 4 from the lighting duct 10. This completes the removal of the lighting fixture 1 from the lighting duct 10.

[0088] <Second embodiment> Next, a second embodiment of the present invention will be described. In the second embodiment, the structure of the fixing part 70 is different from that of the first embodiment. FIG. 11 is a front view of the fixing part 70 in a lighting fixture 1B according to the second embodiment. Note that a description of the same configuration as in the first embodiment will be omitted. In the lighting fixture 1B shown in FIG. 11, the internal structure of a lighting duct 10B is different from that of the first embodiment. The internal structure of the lighting duct 10B can be changed according to the required specifications.

[0089] (5) Fixed part 70 The fixed part 70 according to the modified example includes a fixed part main body 71 and a rail hook 72. The fixed part main body 71 has a rectangular parallelepiped shape, and is fixed to the upper surface of the lid 32 of the case 30 of the power source 3.

[0090] A small insertion portion 71A is formed in the width direction W at the upper portion of the fixing portion main body 71. The width dimension of the insertion portion 71A is smaller than the width dimension of the groove of the rail 11 in the lighting duct 10B. The insertion portion 71A is inserted into the groove of the rail 11 in the lighting duct 10B when the fixing portion 70 is attached to the inside of the lighting duct 10B.

[0091] The rail hook 72 is a plate-like member whose front and back surfaces face the longitudinal direction LG. An arc-shaped guide groove 75 is formed in the rail hook 72. A screw 74 is arranged inside the guide groove 75. A hook portion 73 is formed at the outer end of the rail hook 72 to engage with the edge of the groove of the rail 11 in the lighting duct 10B.

[0092] The rail hook 72 is attached to an end face in the longitudinal direction LG of the fixed portion main body 71. The rail hook 72 rotates around a rotation axis Ax3 extending in the longitudinal direction LG. At this time, the guide groove 75 is guided by the screw 74.

[0093] The following describes the operation of fixing the power source 3 to the lighting duct 10B using the fixing part 70 according to the modified example. First, the user inserts the insertion part 71A of the fixing part main body 71 into the inside of the groove of the rail 11 in the lighting duct 10B.

[0094] In this state, the user rotates rail hook 72 to hook hook portion 73 onto the edge of the groove of rail 11 in lighting duct 10B. In this state, the position of rail hook 72 is fixed by tightening screw 74 of rail hook 72. As a result, fixing portion 70 is attached to rail 11, and power supply 3 is fixed to lighting duct 10B.

[0095] (6) Variations Next, modified examples of the lighting device 1 will be described.

[0096] In the above embodiment, the plug unit 4 includes the first plug portion 42A and the second plug portion 42B, but this is not limiting. That is, the number of plug portions 42 can be selected arbitrarily.

[0097] In the above embodiment, the lighting duct 10 includes the conductive portion 12 and the signal transmission portion 13, but this is not limited thereto. That is, the lighting duct 10 does not need to include at least one of the conductive portion 12 and the signal transmission portion 13.

[0098] In the above embodiment, the light body 2 and the power source 3 of the lighting fixture 1 are shown as the mounting fixture attached to the lighting duct 10 by the plug unit 4, but this is not limited to this. In other words, the mounting fixture attached to the lighting duct 10 is not limited to a lighting device.

[0099] For example, any of the following devices can be attached to the lighting duct 10 using the plug unit 4: a plug for a duct rail, an air purifier, an aroma generating device, an air conditioning device, a ventilation device, a medical device, a video device, and an audio device.

[0100] 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 embodiments, and can be implemented in various forms without departing from the spirit of the present invention. The drawings are mainly schematic illustrations of each component for ease of understanding, and the thickness, length, number, etc. of each component shown in the drawings are different from the actual ones due to the convenience of drawing. In addition, the materials, shapes, dimensions, etc. of each component shown in the above embodiments are merely examples and are not particularly limited, and various modifications or combinations are possible within a range that does not substantially deviate from the effects of the present invention. [Explanation of symbols]

[0101] 1, 1B Lighting equipment 2 lamps 3 Power supply (mounting equipment) 4 Plug Unit 41 Case 42 Plug section 42A 1st plug section 42B 2nd plug section 43 Protrusion 43A 1st protrusion 43B 2nd protrusion 44 Control section 44A 1st operation section 44B 2nd operation section 50 Support part 51 Support bolt 52 Support nut 53 Spacer 60 Fixed part

Claims

1. A housing supported by a lighting duct; A protrusion that engages with the lighting duct inside the lighting duct; an operation portion used for attaching and detaching the protrusion to and from the housing; The plug unit further comprises a support portion that supports a mounting device attached to the lower portion of the housing so that the mounting device can rotate freely around a rotation axis extending in the vertical direction.

2. The support portion includes a support bolt arranged coaxially with the rotation shaft. a spacer disposed between the housing and the mounting fixture; The plug unit according to claim 1 , further comprising a support nut attached to the support bolt.

3. The plug unit according to claim 2 , wherein the head of the support bolt has an outer circumferential edge, the distance from the rotation shaft varies depending on the position in the outer circumferential edge in a plan view.

4. The plug unit according to claim 2 or 3, wherein the support bolt is hollow.

5. A stopper is provided on the upper surface of the mounting device, 4. The plug unit according to claim 2, wherein the spacer is positioned relative to the housing and engages with the stopper as the mounting device rotates about the rotation axis, thereby restricting a rotation range of the mounting device.

6. A positioning boss protruding downward is provided on the bottom surface of the housing, The plug unit according to claim 5 , wherein the spacer is restricted in its relative displacement about the rotation axis with respect to the housing by the positioning boss.

7. The housing extends in a longitudinal direction along the lighting duct, a first plug portion for supplying power to the mounting device; a second plug portion for providing a control signal to the mounting device; A first operation unit attached to one end of the housing; The plug unit according to claim 2 or 3, further comprising a second operating portion attached to the other end of the housing.

8. The plug unit according to any one of claims 1 to 3, which is supported by an elongated lighting duct; a power source having one end in the longitudinal direction attached to the plug unit by the support portion; A light body attached to the power source; A lighting fixture comprising:

9. The lighting fixture according to claim 8 , further comprising a fixing part that fixes an end part of the power source on the other side in the longitudinal direction to the lighting duct.

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