Lighting fixtures

Abstract

To provide a lighting device which can secure continuity of the appearance with a line lighting.SOLUTION: A lighting device 1 is connected to a line lighting L1 having a rectangular parallelepiped shape. The lighting device 1 includes an attachment unit 3 and a lamp body 2. The attachment unit 3 is attached to a rail part R from below and connected to the line lighting L1. The lamp body 2 is connected to the attachment unit 3. The attachment unit 3 has a housing 3A. The housing 3A has, on side surfaces 201, 202 facing the line lighting L1, recessed parts 3B, 3C which respectively house ends L4 of the line lighting L1.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to lighting fixtures.

Background Art

[0002] Patent Document 1 discloses a power box device that is attached from below to a wiring duct. The power box device includes a power box that houses the power supply of a lighting fixture, and a plug that is electrically connected to the wiring duct. The power box has a substantially rectangular parallelepiped shape that is long in the same direction as the direction in which the wiring duct extends. A spotlight is attached to the power box device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Multiple lighting fixtures may be attached to the wiring duct. For example, a spotlight having the power box device disclosed in Patent Document 1 and a linear lighting that is long in the direction in which the wiring duct extends are attached in a state of being connected to the same wiring duct. In Patent Document 1, the continuity in appearance when the power box device of the spotlight and the linear lighting are attached in a connected state is not considered. Therefore, the unity in appearance between the power box device of the spotlight and the linear lighting is poor, and the aesthetics of the installation space may be impaired.

[0005] An object of the present invention is to provide a lighting fixture that can ensure continuity in appearance with linear lighting.

Means for Solving the Problems

[0006] The luminaire disclosed herein is connected to a rectangular parallelepiped-shaped linear luminaire. The luminaire comprises a mounting unit and a luminaire body. The mounting unit is attached to the mounting body from below and is connected to the linear luminaire. The luminaire body is connected to the mounting unit. The mounting unit has a housing. The housing has a recess on the side facing the linear luminaire for accommodating the end of the linear luminaire.

[0007] In the lighting fixture disclosed herein, the recess preferably has a first wall and a second wall that are parallel to the longitudinal direction of the line lighting and face each other. Preferably, each of the first wall and the second wall protrudes from the side surface of the housing.

[0008] In the lighting fixture disclosed herein, the inner surface of the first wall is preferably facing the first outer surface of the line lighting. The inner surface of the second wall is preferably facing the second outer surface of the line lighting. The dimension from the inner surface of the first wall to the inner surface of the second wall in the recess is preferably greater than the dimension from the first outer surface to the second outer surface of the line lighting.

[0009] In the lighting fixture disclosed herein, the recess preferably has a third wall connecting the first wall and the second wall. The third wall is preferably located on the side of the luminaire body that is closer to the mounting body.

[0010] In the lighting fixture disclosed herein, it is preferable that the inner surface of the third wall faces the third outer surface of the line lighting. It is preferable that the dimension from the inner surface of the third wall to the upper surface of the mounting unit in a direction perpendicular to the third wall is greater than the dimension of the line lighting in a direction perpendicular to the third outer surface. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a lighting fixture that can ensure visual continuity with linear lighting. [Brief explanation of the drawing]

[0012] [Figure 1] It is a perspective view showing a lighting fixture according to Embodiment 1. [Figure 2] It is a perspective view showing a state where the lighting fixture according to Embodiment 1 and the linear lighting are connected. [Figure 3] It is a perspective view when the lighting fixture is in the first posture. [Figure 4] It is a perspective view when the lighting fixture is in the second posture. [Figure 5] It is a plan view when the lighting fixture is in the first posture. [Figure 6] It is a plan view when the lighting fixture is in the second posture. [Figure 7] It is an exploded perspective view of the upper half of the lighting fixture. [Figure 8] It is an exploded perspective view of the lower half of the lighting fixture. [Figure 9] It is an exploded perspective view of the plug portion. [Figure 10] It is a view showing the X-X cross section of the lighting fixture shown in FIG. 6. [Figure 11] It is a view showing the XI-XI cross section of the lighting fixture shown in FIG. 6. [Figure 12] It is a perspective view when the lighting fixture according to Embodiment 2 is in the first posture. [Figure 13] It is a perspective view when the lighting fixture according to Embodiment 2 is in the second posture. [Figure 14] It is a plan view when the lighting fixture according to Embodiment 2 is in the first posture. [Figure 15] It is a plan view when the lighting fixture according to Embodiment 2 is in the second posture. [Figure 16] It is a view showing the XVI-XVI cross section of the lighting fixture shown in FIG. 15. [Figure 17] It is a perspective view of a lighting fixture according to Embodiment 3.

Mode for Carrying Out the Invention

[0013] 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 the description will not be repeated. In the embodiments, the X-axis, Y-axis, and Z-axis are orthogonal to each other. The X-axis and Y-axis are parallel to the horizontal plane. The Z-axis is parallel to the vertical line. The first direction PD1 extends in the X-axis direction. The second direction PD2 extends in the Y-axis direction. The third direction PD3 extends in the Z-axis direction.

[0014] <Embodiment 1> Referring to FIGS. 1 to 11, the lighting fixture 1 according to Embodiment 1 will be described. FIG. 1 is a perspective view of the lighting fixture 1 according to Embodiment 1. FIG. 2 is a perspective view showing a state in which the lighting fixture 1 according to Embodiment 1 and the line lighting L1 are connected.

[0015] As shown in FIGS. 1 and 2, the lighting fixture 1 is attached to the rail portion R. The rail portion R is fixed to the ceiling or the like. The rail portion R is an example of an attachment body. The first direction PD1 is the direction in which the rail portion R extends. Also, the line lighting L1 is attached to the rail portion R. In the example of FIG. 1, one line lighting L1 is attached to the rail portion R. In the example of FIG. 2, two line lightings L1 are attached to the rail portion R, and the two line lightings L1 and the lighting fixture 1 are connected. More specifically, one line lighting L1 is connected to one side in the X-axis direction of the lighting fixture 1, and another line lighting L1 is connected to the other side in the X-axis direction of the lighting fixture 1. Note that the number of line lightings L1 does not have to be two, and only one of them may be used.

[0016] The lighting fixture 1 comprises a luminaire body 2 and a mounting unit 3. The luminaire body 2 is connected to the mounting unit 3. For example, the luminaire body 2 is connected to the mounting unit 3 by a connecting arm 4, which will be described later. The luminaire body 2 incorporates a light source unit 2a and emits light from the light source unit 2a to the outside. In this embodiment, the luminaire body 2 is a spotlight. However, the luminaire body 2 is not limited to a spotlight and may be a pendant light or the like. The mounting unit 3 is attached to the rail section R from below and is connected to the line lighting L1. The third direction PD3 is the direction in which the mounting unit 3 is attached to the rail section R.

[0017] The line lighting L1 comprises a light source unit L2 and a mounting frame L3. The mounting frame L3 is rectangular in shape and is attached to the rail section R from below. The mounting frame L3 is made of, for example, metal. A power supply unit (not shown) is housed inside the mounting frame L3. External power from an external power supply is supplied from the rail section R to the power supply unit. The light source unit L2 is rectangular in shape and is fixed to the mounting frame L3. A light source (not shown), such as an LED (Light Emitting Diode), is housed inside the light source unit L2. The light source unit L2 is made of, for example, resin and transmits or diffuses light. Power for lighting is supplied from the power supply unit of the mounting frame L3 to the light source of the light source unit L2.

[0018] The line lighting L1 has a first outer surface L1A (see Figure 5), a second outer surface L1B, a third outer surface L1C, and a fourth outer surface L1D (see Figure 11). The first outer surface L1A and the second outer surface L1B are spaced apart and face each other in the second direction PD2. The second direction PD2 is perpendicular to the first direction PD1. The third outer surface L1C and the fourth outer surface L1D are spaced apart and face each other in the third direction PD3. The third outer surface L1C is located on the lower side, and the fourth outer surface L1D is located on the upper side, i.e., on the side opposite the rail section R.

[0019] The openings at both ends of the rectangular tubular mounting frame L3 are closed by a pair of closing members L3A, L3A (see Figure 11). Similarly, the openings at both ends of the rectangular tubular light source unit L2 are closed by a pair of closing members L2A, L2A. The pair of closing members L2A, L3A constitute the end L4.

[0020] Next, the outline of the mounting unit 3 will be described with reference to Figures 1 to 6. Figure 3 is a perspective view when the lighting fixture 1 is in the first position. Figure 4 is a perspective view when the lighting fixture 1 is in the second position. Figure 5 is a plan view when the lighting fixture 1 is in the first position. Figure 6 is a plan view when the lighting fixture 1 is in the second position.

[0021] The mounting unit 3 has a housing 3A. The housing 3A has recesses 3B and 3C. Recess 3C is provided on the side 201 of the housing 3A that faces one of the line lights L1 and accommodates the end L4 of one of the line lights L1. Recess 3B is provided on the side 202 of the housing 3A that faces the other line light L1 and accommodates the end L4 of the other line light L1.

[0022] In this configuration, when the lighting fixture 1 and the line lighting L1 are installed in a connected state, the end L4 of the line lighting L1 is housed in the recess 3B or recess 3C. As a result, the mounting unit 3 of the lighting fixture 1 and the line lighting L1 are arranged in a straight line. In addition, the gap between the lighting fixture 1 and the line lighting L1 in the first direction PD1 is hidden by the mounting unit 3. Therefore, the visual continuity between the mounting unit 3 of the lighting fixture 1 and the line lighting L1 can be ensured. Furthermore, the visual unity between the mounting unit 3 of the lighting fixture 1 and the line lighting L1 can be enhanced. Thus, the aesthetic appeal of the installation space can be suppressed.

[0023] Next, the details of the lighting fixture 1 will be described with reference to Figures 1 to 11. Figure 7 is an exploded perspective view of the upper half of the lighting fixture 1. Figure 8 is an exploded perspective view of the lower half of the lighting fixture 1. Figure 9 is an exploded perspective view of the plug portion 100. Figure 10 is a diagram showing the XX cross-section of the lighting fixture 1 shown in Figure 6. Figure 11 is a diagram showing the XI-XI cross-section of the lighting fixture 1 shown in Figure 6.

[0024] The rail section R transmits external power from an external power source to the lighting fixture 1 and the line lighting L1. As shown in Figures 1, 2, and 10, the rail section R is elongated and includes a pair of transmission sections R1, a recess R2, and an opening R3. The pair of transmission sections R1 protrude from the side wall of the recess R2. A power supply voltage is applied to the pair of transmission sections R1 to supply power to the lighting fixture 1 and the line lighting L1. The rail section R is attached to a mounting section in a structure such as a building. The mounting section is, for example, the ceiling surface of a room in a building. Note that the rail section R is not limited to the ceiling surface and may be embedded in the ceiling. Specifically, the rail section R is embedded in the ceiling by attaching it to a recess formed in the ceiling.

[0025] First, let me explain the mounting unit 3. The mounting unit 3 includes a plug section 100, a mounting base 200, a main body section 210, and a plug cover 220.

[0026] The mounting base 200 is a U-shaped member. The mounting base 200 is made of metal, for example. The mounting base 200 has a side surface 201, a side surface 202, and a top surface 203. Side surface 201 is a surface perpendicular to the first direction PD1 and faces the end L4 of one line light L1 when attached to the rail section R. Side surface 202 is approximately parallel to side surface 201 and is spaced apart from side surface 201. Side surface 202 faces the end L4 of the other line light L1 when attached to the rail section R. The top surface 203 is a surface that connects side surface 201 and side surface 202. When the lighting fixture 1 is attached to the rail section R, the top surface 203 faces upward, i.e., towards the rail section R. The top surface 203 has a notch 204 on the side that contacts the second wall 212. The notch 204 connects the inside of the mounting base 200 to the outside of the mounting base 200.

[0027] The main body 210 is a U-shaped member. The main body 210 is made of, for example, metal. The main body 210 has a first wall 211, a second wall 212, and a third wall 213. The first wall 211 is a surface substantially parallel to the first direction PD1 and the third direction PD3. The second wall 212 is substantially parallel to the first wall 211 and is spaced apart from it. The second wall 212 has a notch 214 on the side that contacts the upper surface 203. The notch 214 connects the inside of the main body 210 to the outside of the main body 210. The third wall 213 is a surface that connects the first wall 211 and the second wall 212. Also, when the mounting base 200 and the main body 210 are assembled, the third wall 213 faces the upper surface 203. When the lighting fixture 1 is attached to the rail section R, the third wall 213 faces downwards.

[0028] The plug cover 220 is a U-shaped member that covers part of the notches 204 and 214. The remaining parts of the notches 204 and 214 are covered by the plug portion 100. The plug cover 220 is made of metal or resin, for example. The plug cover 220 has a first surface 221, a second surface 222, and a third surface 223. The first surface 221 is a surface perpendicular to the first direction PD1 and faces the side surface 201 of the mounting base 200. The second surface 222 is approximately parallel to the first surface 221 and is spaced apart from the first surface 221. The second surface 222 faces the side surface 202 of the mounting base 200. The third surface 223 is a surface that connects the first surface 221 and 222. The third surface 223 faces the third wall 213 of the main body portion 210.

[0029] The mounting unit 3 of the lighting fixture 1 according to Embodiment 1 differs in size from the mounting unit 3 of the lighting fixture 1 according to Embodiment 2, which will be described later. On the other hand, the plug portion 100 is the same size regardless of the size of the mounting unit 3. Therefore, when the mounting unit 3 and the plug portion 100 are assembled in this embodiment, a portion of the notches 204 and 214 remains open. A plug cover 220 is used to close the partial openings of the notches 204 and 214.

[0030] Furthermore, in the plug cover 220, the space enclosed by the first surface 221, the second surface 222, and the third surface 223 is a space for the user to access the lever portion 132 of the plug portion 100.

[0031] The mounting base 200, the plug section 100, and the plug cover 220 are fastened together with screws 206C and 206D, forming a single unit. Furthermore, the mounting base 200 and the main body section 210 are fastened together with screws 215A to 215D, forming a single unit, i.e., housing 3A. Thus, the mounting base 200, plug section 100, plug cover 220, and main body section 210 form a single unit, i.e., mounting unit 3.

[0032] As described above, the housing 3A has recesses 3B and 3C on its sides 201 and 202 facing the line lighting L1, which accommodate the end L4 of the line lighting L1. Recess 3B has a first wall 211 and a second wall 212 that are parallel to the longitudinal direction of the line lighting L1 (i.e., the first direction PD1) and face each other. Each of the first wall 211 and the second wall 212 protrudes from the side 202 of the housing 3A. Similarly, recess 3C also has a first wall 211 and a second wall 212 that are parallel to the longitudinal direction of the line lighting L1 and face each other. Each of the first wall 211 and the second wall 212 protrudes from the side 201 of the housing 3A. In other words, the length of the main body 210 of the first direction PD1 is longer than the length of the mounting base 200 of the first direction PD1. As a result, the ends of the first wall 211 and the second wall 212 on the recess 3B side protrude from the side surface 202 on the recess 3B side. Also, the ends of the first wall 211 and the second wall 212 on the recess 3C side protrude from the side surface 201 on the recess 3C side.

[0033] The gap between the mounting unit 3 and the line lighting L1 in the first direction PD1 is concealed by the first wall 211 and the second wall 212 protruding from the side 201. Similarly, the gap between the mounting unit 3 and the line lighting L1 in the first direction PD1 is concealed by the first wall 211 and the second wall 212 protruding from the side 202. Furthermore, by positioning the boundary (joint) between the light source L2 and the blocking member L2A of the line lighting L1, and the boundary (joint) between the mounting frame L3 and the blocking member L3A, within the recesses 3B and 3C, the boundaries (joints) are concealed by the first wall 211 and the second wall 212. Thus, the visual continuity between the mounting unit 3 of the lighting fixture 1 and the line lighting L1 can be ensured, and the visual sense of unity can be enhanced. Moreover, as shown in Figure 2, when two line lightings L1 are connected to the mounting unit 3, the visual continuity (linearity) of the two line lightings L1 can be ensured. In other words, the mounting unit 3 can be made to appear as if a single line of lighting L1 is penetrating it. To achieve this appearance, it is preferable that the dimension D12 of the mounting unit 3 is larger than the dimension D11 of the line of lighting L1, as shown in Figure 5. Dimension D12 is the distance from the outer surface of the first wall 211 to the outer surface of the second wall 212.

[0034] Furthermore, recess 3B has a third wall 213 connecting the first wall 211 and the second wall 212. The third wall 213 is located on the side of the luminaire body 2, relative to the rail portion R, which is the mounting body. In recess 3B, the third wall 213 protrudes from the side surface 202. Similarly, recess 3C also has a third wall 213 connecting the first wall 211 and the second wall 212. In recess 3C, the third wall 213 protrudes from the side surface 201. In other words, the length of the main body portion 210 in the first direction PD1 is longer than the length of the mounting base 200 in the first direction PD1. As a result, the end of the third wall 213 on the recess 3B side protrudes from the side surface 202 on the recess 3B side. Also, the end of the third wall 213 on the recess 3C side protrudes from the side surface 201 on the recess 3C side.

[0035] The third wall 213 protruding from the side 201 hides the gap between the mounting unit 3 and the line lighting L1 on the lower side of the first direction PD1. Similarly, the third wall 213 protruding from the side 202 hides the gap between the mounting unit 3 and the line lighting L1 in the first direction PD1. Furthermore, by positioning the boundary (joint) between the light source L2 and the closing member L2A of the line lighting L1 within the recesses 3B and 3C, the boundary is hidden by the third wall 213. Thus, the visual continuity between the mounting unit 3 of the lighting fixture 1 and the line lighting L1 can be ensured, and the visual sense of unity can be enhanced. In addition, the end L4 of the line lighting L1 is held by the third wall 213 protruding from the side 201, thus preventing the line lighting L1 from falling off.

[0036] As shown in Figures 2 and 5, the inner surface of the first wall 211 faces the first outer surface L1A of the line lighting L1. The inner surface of the second wall 212 faces the second outer surface L1B of the line lighting L1. The dimension D10 from the inner surface of the first wall 211 to the inner surface of the second wall 212 in the recesses 3B and 3C is preferably larger than the dimension D11 from the first outer surface L1A to the second outer surface L1B of the line lighting L1. This allows the end portion L4 of the line lighting L1 to be accommodated within the recesses 3B and 3C.

[0037] The smaller the difference between dimension D10 and dimension D11, the smaller the gap between the first wall 211 and the first outer surface L1A, and the smaller the gap between the second wall 212 and the second outer surface L1B. The smaller the gap, the more the misalignment of the mounting unit 3 and the line lighting L1 in the Y-axis direction can be suppressed. Therefore, the visual continuity between the mounting unit 3 and the line lighting L1 of the lighting fixture 1 can be ensured, and the visual sense of unity can be enhanced. In addition, the smaller the gap, the less dust and other debris can be accumulated in the gap. Furthermore, as shown in Figure 2, when two line lighting L1s are connected to the mounting unit 3, misalignment of the two line lighting L1s in the Y-axis direction can also be suppressed. This ensures the visual continuity (linearity) of the two line lighting L1s when they are connected to the mounting unit 3.

[0038] As shown in Figures 2 and 11, the inner surface of the third wall 213 faces the third outer surface L1C of the line lighting L1. Preferably, the dimension D20 from the inner surface of the third wall 213 to the upper surface 203 of the mounting unit 3 in the direction perpendicular to the third wall 213 (i.e., the third direction PD3) is greater than the dimension D21 of the line lighting L1 in the direction perpendicular to the third outer surface L1C (i.e., the third direction PD3). This allows the end portion L4 of the line lighting L1 to be accommodated within the recesses 3B and 3C.

[0039] The smaller the difference between dimension D20 and dimension D21, the more the height dimension of the mounting unit 3 and the height dimension of the line lighting L1 in the third direction PD3 will be the same. The more the height dimensions are the same, the more visual continuity can be ensured between the mounting unit 3 and the line lighting L1, and the greater the sense of unity in appearance can be enhanced.

[0040] As shown in Figure 2, the first outer surface L1A, the second outer surface L1B facing the first outer surface L1A, and the third outer surface L1C of the line lighting L1 are flat surfaces. Therefore, it is preferable that the outer surfaces of the first wall 211, the second wall 212, and the third wall 213 are also flat surfaces. By having flat surfaces on the outer surfaces of the mounting unit 3 and the line lighting L1, it is possible to ensure visual continuity between the mounting unit 3 and the line lighting L1, and to enhance the sense of unity in appearance.

[0041] In the illustrated example, the screws 215A to 215D that fasten the mounting base 200 to the main body 210 are arranged so that their heads are exposed on the sides 201 and 202. The heads of the screws 215A to 215D are hidden by the end L4 of the line lighting L1 and are not easily visible to the user. In addition, the screws 206A to 206D that fasten the mounting base 200 to the plug part 100 etc. are arranged so that their heads are exposed on the top surface 203. The heads of the screws 206A to 206D are exposed on the ceiling side and are not easily visible to the user. With this configuration, the outer surfaces of the first wall 211, the second wall 212, and the third wall 213, which are visible to the user, become flat surfaces without irregularities. Thus, the visual continuity between the mounting unit 3 and the line lighting L1 can be ensured, and the sense of unity in appearance can be enhanced.

[0042] By changing the positions of screws 215A to 215D, the configuration may be made so that the heads of each screw are not exposed on the sides 201 and 202. In this configuration, since the sides 201 and 202 become flat surfaces, the end L4 of the line lighting L1 can be brought into contact with the sides 201 and 202 without any gaps. This makes it possible to position the line lighting L1 in the first direction PD1 with respect to the sides 201 and 202 of the lighting fixture 1.

[0043] In this example, the mounting base 200 and the main body 210, which are separate components, are fastened together with screws 215A to 215D to form a single unit, but this is not the only option. For example, the mounting base 200 and the main body 210 may be made from a single component. In this case, screws 215A to 215D would not be necessary, and the sides 201 and 202 would be flat surfaces.

[0044] As shown in Figures 3 and 4, a rotation prevention device 205 may be attached to the upper surface 203 of the mounting base 200. The rotation prevention device 205 is adjacent to the connecting portion 120 of the plug portion 100 in the first direction PD1, which is the direction in which the rail portion R extends. The rotation prevention device 205 is fastened to the upper surface 203 by screws 206A and 206C. In this embodiment, the rotation prevention device 205 is closer to the side surface 201 than to the plug portion 100 in the first direction PD1, but it may be closer to the side surface 202 instead. In that case, the rotation prevention device 205 should be fastened to the upper surface 203 by screws 206B and 206D.

[0045] With the lighting fixture 1 attached to the rail section R, the anti-rotation device 205 is positioned in the recess R2 of the rail section R. Therefore, even if vibration is applied to the lighting fixture 1 when the connecting portion 120 of the plug section 100 is not precisely engaged with the rail section R, the anti-rotation device 205 functions as a stopper, preventing the mounting unit 3 from rotating around the connecting portion 120. As a result, the rotation of the connecting portion 120 accompanying the rotation of the mounting unit 3 is suppressed, thus preventing the connecting portion 120 from coming off the rail section R. Consequently, the lighting fixture 1 can be stably attached to the rail section R. Furthermore, since the rotation of the mounting unit 3 relative to the rail section R is suppressed, the rotation or tilting of the luminaire body 2 accompanying the rotation of the mounting unit 3 is suppressed. As a result, the direction of light emission from the luminaire body 2 is prevented from changing to a direction unintended by the user.

[0046] Next, the luminaire body 2 will be described. The luminaire body 2 includes a rear cover 300, a shade 320, a socket base 330, a socket 340, and a light source unit 2a.

[0047] As shown in Figure 8, the rear cover 300 has a roughly disc-shaped main body 301. The main body 301 is made of, for example, metal. An arm holding portion 303 is formed on the lower surface of the main body 301. The arm holding portion 303 holds the pivot portion 412 of the connecting arm 4 so that it can rotate relative to the pivot axis CX. The pivot axis CX extends in the X-axis direction.

[0048] In the main body 301, a notch 302 is provided at a position opposite the arm holding portion 303 for inserting the rotating portion 412. The rotating portion 412 is attached to the arm holding portion 303 by passing through the notch 302 of the main body 301.

[0049] The arm holder 303 and the rotating part 412 are fastened together by a shaft member 304 and a nut 420 so that they can rotate relative to each other around the pivot axis CX. A washer 421 is sandwiched between the arm holder 303 and the rotating part 412. The shaft member 304 functions as the pivot axis CX. With this configuration, the rear cover 300 is rotatable around the pivot axis CX. The lamp body 2, which is integrated with the rear cover 300, is also rotatable around the pivot axis CX.

[0050] The shade 320 has a cylindrical portion 321. The cylindrical portion 321 is made of metal, for example. As shown in Figure 8, the rear cover 300 is fastened to the cylindrical portion 321 at one end by screws 305A and 305B. The other end of the cylindrical portion 321 is an opening for irradiating the light emitted by the light source unit 2a to the outside of the lamp body 2. Inside the cylindrical portion 321, the socket base 330 is fastened to the cylindrical portion 321 by screws 331A and 331B. The socket 340 is fastened to the socket base 330 by screws 332A and 332B.

[0051] A notch 322 is formed at the end of the cylindrical portion 321 on the side to which the rear cover 300 is fastened. The notch 322 of the shade 320 is connected to the notch 302 of the rear cover 300. When the lamp body 2 rotates upward around the pivot axis CX, the connecting arm portion 4 retracts into the notches 302 and 322. As a result, the lamp body 2 can rotate approximately 90 degrees around the pivot axis CX. More specifically, the lamp body 2 can assume any position, from a downward-facing position as shown by the solid line in Figure 10 to a horizontal position as shown by the dashed line.

[0052] The socket 340 has a pair of conductive terminals 341. Each of the pair of conductive terminals 341 is connected to one end of the power line 240 (see Figure 10). In other words, external power is transmitted to the socket 340 via the rail section R, the plug section 100, and the power line 240.

[0053] The light source unit 2a is, for example, an LED lamp. The power plug of the light source unit 2a is plugged into the socket 340. External power is supplied from the socket 340 to the power supply circuit built into the light source unit 2a via the power plug of the light source unit 2a. Note that the light source unit 2a does not need to be a light source with a built-in power supply circuit; the power supply circuit may be installed inside the shade 320 or inside the mounting unit 3.

[0054] Next, the connecting arm 4 will be described. The connecting arm 4 connects the mounting unit 3 and the lamp body 2 so that they can rotate relative to each other around the pivot axis BX. The pivot axis BX extends in the Z-axis direction. Note that the pivot axis AX and the pivot axis BX may be arranged on the same axis or offset from each other.

[0055] In this embodiment, the pivot axis AX and the pivot axis BX are positioned separately. The pivot axis BX is positioned to pass through the central axis of the lamp body 2. Because the pivot axis BX and the central axis of the lamp body 2 are positioned on the same axis, when the user rotates the lamp body 2 around the pivot axis BX, it is easy to direct the lamp body 2 in the direction intended by the user. Therefore, light can be emitted in the direction intended by the user. In particular, when the user rotates the lamp body 2 around the pivot axis CX and also around the pivot axis BX, it is easy to direct the lamp body 2 in the direction intended by the user. If the pivot axis BX and the central axis of the lamp body 2 are not positioned on the same axis, the lamp body 2 will rotate eccentrically around the pivot axis BX, making it difficult to direct the lamp body 2 in the direction intended by the user.

[0056] The connecting arm section 4 has a pair of arms 400 and 410. The pair of arms 400 and 410 are combined to form the connecting arm section 4. The connecting arm section 4 includes a cylindrical section 411, a rotating section 412, a connecting section 413, and a flange 414.

[0057] As shown in Figure 10, the cylindrical part 411 of the connecting arm 4 is located on the mounting unit 3 side, and the rotating part 412 is located on the lamp body 2 side. The cylindrical part 411 is cylindrical and hollow inside. The rotating part 412 is roughly disc-shaped and hollow inside. The central axis of the cylindrical part 411 extends in the Z-axis direction, while the central axis of the rotating part 412 extends in the X-axis direction. The hollow inside the cylindrical part 411 and the hollow inside the rotating part 412 are in communication, forming a communication part 413. The power line 240 is located in the communication part 413. The rotating part 412 is also provided with an opening for the power line 240 to exit from the communication part 413 into the interior of the lamp body 2.

[0058] The cylindrical portion 411 is inserted into the mounting unit 3 through a through hole formed in the third wall 213 of the mounting unit 3. A flange 414 protruding outward is formed in the middle of the cylindrical portion 411. A washer 435 is sandwiched between the third wall 213 and the flange 414. Washers 431, 432, and 433, and a rotation stopper fitting 434 are attached to the cylindrical portion 411 inserted into the mounting unit 3 through the through hole in the third wall 213. The tip of the cylindrical portion 411 is threaded, and a nut 430 is fastened to it. With the above configuration, the connecting arm portion 4 can rotate 360 ​​degrees around the pivot axis BX. The lamp body 2 connected to the connecting arm portion 4 can also rotate approximately 360 degrees around the pivot axis BX.

[0059] A power line 240 is positioned at the communication section 413 of the connecting arm section 4. One end of the power line 240 is connected to the conductive part 160 of the plug section 100 inside the mounting unit 3. The power line 240 passes through the communication section 413 of the connecting arm section 4, exits through the opening of the rotating section 412, and is led into the interior of the luminaire body 2. Inside the luminaire body 2, the power line 240 passes through the through hole 330A (see Figure 8) of the socket base 330 and is connected to the conductive terminal 341 of the socket 340.

[0060] The rotation-preventing fitting 434 includes a plate 434A, a through hole 434B, and a wire fixing portion 434C. The plate 434A is installed on the third wall 213 of the main body 210 and is fixed in a state where it fits inside the main body 210. The cylindrical portion 411 of the connecting arm portion 4 passes through the through hole 434B of the plate 434A. The wire fixing portion 434C extends in the Z-axis direction from one side of the plate 434A. As shown in Figure 10, the power supply wire 240 is fixed to the wire fixing portion 434C by a cable tie 241. Note that the method of fixing the power supply wire 240 to the wire fixing portion 434C is not limited to the method using a cable tie 241.

[0061] Next, the plug section 100 will be described. The plug section 100 is connected to the rail section R to supply external power to the light source unit 2a. As shown in Figure 9, the plug section 100 has a bolt holding section 110, a connecting section 120, a switching section 130, a plug base section 140, a terminal support section 150, a conductive section 160, and a nut holding section 170.

[0062] As shown in Figure 10, the bolt holding portion 110 and the connecting portion 120 of the plug portion 100, and a part of the switching portion 130, protrude upward from the mounting unit 3. A part of the switching portion 130, the plug base portion 140, the terminal support portion 150, the conductive portion 160, and the nut holding portion 170 are housed within the mounting unit 3.

[0063] The connecting section 120 is connected to the rail section R. Specifically, the mounting unit 3 is attached to the rail section R by connecting the connecting section 120 to the rail section R. More specifically, the lighting fixture 1 is attached to the rail section R by connecting the connecting section 120 to the rail section R. In addition, the connecting section 120 of the plug section 100, which supplies external power to the light source unit 2a, can relay external power to the conductive section 160 by being connected to the rail section R.

[0064] The conductive part 160 transmits external power to the power supply unit 15. Specifically, the conductive part 160 transmits the external power relayed by the connecting part 120 to the light source unit 2a.

[0065] The mounting unit 3 houses the conductive part 160, which is part of the connecting part 120. Therefore, the connecting part 120 can be exposed to the outside of the mounting unit 3. As a result, when the lighting fixture 1 is connected to the rail part R, almost the entire connecting part 120 is housed inside the rail part R, and the lighting fixture 1 can be positioned close to the rail part R.

[0066] Furthermore, since the conductive part 160 of the plug part 100 is housed in the mounting unit 3, the entire plug part 100 does not protrude from the mounting unit 3. Therefore, the gap between the lighting fixture 1 and the rail part R when the lighting fixture 1 is attached to the rail part R can be reduced. As a result, the gap between the lighting fixture 1 and the rail part R becomes smaller, and the reduction in aesthetics caused by the gap can be suppressed.

[0067] Furthermore, as shown in Figure 1, reducing the gap between the lighting fixture 1 and the rail section R enhances the visual integration of the lighting fixture 1 and the rail section R. Specifically, reducing the gap between the lighting fixture 1 and the rail section R makes the first wall 211 and the second wall 212 of the mounting unit 3 and the side surface R4 of the rail section R appear to be composed of a continuous surface, thereby enhancing the visual integration of the lighting fixture 1 and the rail section R.

[0068] Furthermore, by reducing the gap between the lighting fixture 1 and the rail section R, dust accumulation on the mounting unit 3 of the lighting fixture 1 can be suppressed. As a result, the effort required to clean the lighting fixture 1 can be reduced.

[0069] Furthermore, because the gap between the lighting fixture 1 and the rail section R is reduced, the lighting fixture 1 does not swing significantly relative to the rail section R. Therefore, the load on the plug section 100 is reduced by the swinging of the lighting fixture 1 relative to the rail section R. As a result, damage to the plug section 100 can be suppressed. For example, when a building shakes due to an earthquake, the ceiling surface also shakes. Then, the rail section R attached to the ceiling surface shakes. In other words, vibrations are transmitted to the lighting fixture. However, in this embodiment, since the lighting fixture 1 does not swing significantly relative to the rail section R, the load on the plug section 100 is reduced. Therefore, damage to the plug section 100 can be suppressed.

[0070] The plug section 100 will be described in more detail with reference to Figures 3 to 6 and Figure 9. The plug section 100 has a switching section 130. The switching section 130 switches the connection state of the connecting section 120 to the rail section R. The connection states are a state in which the rail section R and the connecting section 120 are connected, and a state in which the rail section R and the connecting section 120 are not connected. Here, the position of the lighting fixture 1 in the state in which the rail section R and the connecting section 120 are connected is referred to as the "first position". The lighting fixture 1 in the first position is shown in Figures 3 and 5. The position of the lighting fixture 1 in the state in which the rail section R and the connecting section 120 are not connected is referred to as the "second position". The lighting fixture 1 in the second position is shown in Figures 4 and 6.

[0071] Furthermore, the plug portion 100 is positioned in the notches 204 and 214. The notches 204 and 214 connect the inside of the mounting unit 3 to the outside of the mounting unit 3, extending from a part of the upper surface 203 of the mounting base 200 to a part of the second wall 212 of the main body portion 210. The notches 214 are provided in the second wall 212, and the lever portion 132 is positioned on the side of the notches 214. Therefore, the switching portion 130 can be operated even when the lighting fixture 1 is attached to the rail portion R. As a result, the convenience of operating the switching portion 130 is improved.

[0072] The switching unit 130 is rotatable around the pivot axis AX. The pivot axis AX extends in the Z-axis direction. When switching the lighting fixture 1 from the second position to the first position, the switching unit 130 rotates around the pivot axis AX in the second rotation direction AX2. As a result of the rotation, as shown in Figure 3, the lever portion 132 of the switching unit 130 is housed in the notch portion 204. Therefore, when the lever portion 132 is housed in the notch portion 204, the user can know that the rail portion R and the lighting fixture 1 are connected.

[0073] When switching the lighting fixture 1 from the first position to the second position, the switching unit 130 rotates in the first rotation direction AX1 around the rotation axis AX. As a result of the rotation, as shown in Figure 4, the lever portion 132 of the switching unit 130 protrudes from the notch 204 and extends to the notch 214. Therefore, if the lever portion 132 is not housed in the notch 204, the user can know that the rail portion R and the lighting fixture 1 are not connected.

[0074] In other words, the user can determine whether the lighting fixture 1 is attached to the rail section R by visually checking the state of the switching unit 130. As a result, the user can easily determine the attachment status of the lighting fixture 1 to the rail section R. Furthermore, for example, it becomes unnecessary to attach a sign to the lighting fixture 1 indicating that the switching unit 130 is in the first state. Similarly, it becomes unnecessary to attach a sign to the lighting fixture 1 indicating that the switching unit 130 is in the second state.

[0075] Next, the plug section 100 will be described in detail. The plug section 100 has a plug base section 140. The plug base section 140 has a connecting section 120, a switching section 130, and a conductive section 160 attached to it. The plug base section 140 has a main body section 141. The main body section 141 has a first support plate 142, a second support plate 144, a first rising wall 145, and a second rising wall 147.

[0076] The first support plate 142 faces the rail section R. The first support plate 142 faces the rail section R at a closer position than the second support plate 144. The first support plate 142 supports the switching section 130. The first support plate 142 is approximately parallel to the upper surface 203. The first support plate 142 positioned in the notch 204 closes a portion of the notch 204.

[0077] The second support plate 144 faces the rail section R. The second support plate 144 faces the rail section R at a position further away from the first support plate 142. The second support plate 144 is approximately parallel to the upper surface 203. The second support plate 144 covers a portion of the notch 204 that is different from the portion covered by the first support plate 142.

[0078] The first rising wall 145 extends from the second support plate 144 toward the first support plate 142. The first rising wall 145 is approximately parallel to the second wall 212. The first rising wall 145 covers the portion of the notch 204 that is different from the portion covered by the first support plate 142 and the portion covered by the second support plate 144. A portion of the first rising wall 145 faces the second rising wall 147.

[0079] The second rising wall 147 extends from the second support plate 144 toward the first support plate 142. The second rising wall 147 extends in a direction that intersects with the second wall 212 and is substantially horizontal to the side surface 201. Specifically, the second rising wall 147 extends in a direction substantially perpendicular to the second wall 212. The second rising wall 147 closes the portion of the notch 204 that is different from the portion that is closed by the first support plate 142, the portion that is closed by the second support plate 144, and the portion that is closed by the first rising wall 145. The second rising wall 147 faces a portion of the first rising wall 145.

[0080] The second rising wall 147 has a first restricting section 148. The first restricting section 148 restricts the rotation of the switching section 130. Specifically, the first restricting section 148 restricts the rotation of the switching section 130, which rotates in the first rotation direction AX1 when the connecting section 120 is in the second position. Therefore, the switching section 130 does not rotate beyond the first restricting section 148. In other words, the rotation of the switching section 130 can be restricted when the connecting section 120 is in the second position.

[0081] As shown in Figure 9, the plug portion 100 further includes a bolt holding portion 110, a switching portion 130, a terminal support portion 150, and a nut holding portion 170.

[0082] The bolt holder 110 holds the bolt 101A (see Figures 5 and 6). The bolt holder 110 can be combined with the connecting part 120, the switching part 130, the terminal support part 150, and the nut holder 170. Specifically, the bolt holder 110 can be combined with the connecting part 120. The bolt holder 110 connected to the connecting part 120 can be combined with the switching part 130. The bolt holder 110 connected to the connecting part 120 and the switching part 130 can be combined with the terminal support part 150. The bolt holder 110 connected to the connecting part 120, the switching part 130, and the terminal support part 150 can be combined with the nut holder 170. The connecting part 120, the switching part 130, the terminal support part 150, and the nut holder 170, when combined with the nut holder 170, rotate around the pivot axis AX.

[0083] The bolt holding portion 110 has a head portion 101, a shaft portion 102, and a through hole 103.

[0084] The through hole 103 extends from the head 101 to the shaft 102. A bolt 101A is inserted through the through hole 103.

[0085] The head portion 101 is exposed to the outside of the mounting unit 3. The head portion 101 is inserted through the opening R3 of the rail portion R.

[0086] The head portion 101 has a pair of first grooves 104. Each of the pair of first grooves 104 holds the relay terminal portion 181. The pair of first grooves 104 are located on the side of the connecting portion 120. The width of the first grooves 104 is greater than the width of the first contact piece 181A. Therefore, the first contact piece 181A can be placed in each of the pair of first grooves 104. The first grooves 104 prevent the first contact piece 181A from falling out of the first grooves 104.

[0087] The shaft portion 102 extends in the Z-axis direction. Specifically, the shaft portion 102 extends from the head portion 101 toward the nut holding portion 170. The outer diameter of the shaft portion 102 is smaller than the outer diameter of the head portion 101. The shaft portion 102 has a rectangular tube portion 105 and a cylindrical portion 106.

[0088] The rectangular tube portion 105 protrudes outward from the center of the shaft portion 102. The outer shape of the rectangular tube portion 105 is approximately rectangular. The outer shape of the rectangular tube portion 105 may also be cross-shaped. The outer diameter of the rectangular tube portion 105 is larger than the outer diameter of the cylindrical portion 106. The rectangular tube portion 105 abuts against the connecting portion 120.

[0089] The rectangular tube portion 105 has a pair of support bases 105A. Each of the pair of support bases 105A supports the relay terminal portion 181, which will be described later. Each of the pair of support bases 105A also presses the relay terminal portion 181 outward from the center of the shaft portion 102.

[0090] The cylindrical portion 106 is in contact with the rectangular tube portion 105.

[0091] The connecting portion 120 is located between the bolt holding portion 110 and the switching portion 130. The connecting portion 120 has a pair of intermediate terminal portions 181, a first cylindrical portion 121, a second cylindrical portion 122, a pair of connecting pieces 126, and a first hole portion 123.

[0092] Each of the pair of relay terminals 181 contacts a pair of transmission units R1 (see Figure 10) and relays external power to the conductive unit 160. The relay terminals 181 do not relay external power to the conductive unit 160 when in the second position. The relay terminals 181 relay external power to the conductive unit 160 when in the first position. In other words, when relaying external power to the conductive unit 160, external power is supplied to the light source unit 2a. Also, when not relaying external power to the conductive unit 160, external power is not supplied to the light source unit 2a. Therefore, with a single operation of the switching unit 130, power can be supplied to the light source unit 2a and the lighting fixture 1 can be attached to the rail unit R. Furthermore, with a single operation of the switching unit 130, the power supplied to the light source unit 2a can be cut off and the lighting fixture 1 can be removed from the rail unit R. As a result, the effort required when attaching the lighting fixture 1 to the rail unit R and when removing the lighting fixture 1 from the rail unit R can be reduced.

[0093] A pair of relay terminals 181 are held by the connecting portion 120. Each of the pair of relay terminals 181 is L-shaped. Each of the pair of relay terminals 181 has a first contact piece 181A, an intermediate piece 181B, and a second contact piece 181C.

[0094] The first contact piece 181A is capable of contacting the transmission portion R1 of the rail portion R (see Figure 10). The first contact piece 181A is exposed from the mounting unit 3. The intermediate piece 181B is located between the first contact piece 181A and the second contact piece 181C. The second contact piece 181C is capable of contacting the conductive terminal 182, which will be described later. The second contact piece 181C is housed in the mounting unit 3.

[0095] The first cylindrical portion 121 abuts against the head 101 of the bolt holding portion 110. The first cylindrical portion 121 extends from the connecting piece 126 toward the head 101. The first contact piece 181A of the relay terminal portion 181 is positioned between the first cylindrical portion 121 and the head 101. In other words, the first cylindrical portion 121 is positioned so that the first contact piece 181A and the connecting piece 126 are separated. As a result, even if there is an obstacle between the first contact piece 181A and the connecting piece 126, the first contact piece 181A and the connecting piece 126 can be rotated. The distance between the first contact piece 181A and the connecting piece 126 corresponds, for example, to the distance from the recess R2 (see Figure 10) of the rail portion R to the transmission portion R1 (see Figure 10).

[0096] The first cylindrical portion 121 has a pair of second grooves 125. Each of the pair of second grooves 125 holds the first contact piece 181A of the relay terminal portion 181. When the first cylindrical portion 121 comes into contact with the head portion 101, the pair of first grooves 104 and the pair of second grooves 125 face each other. Therefore, the first contact piece 181A is held between the pair of first grooves 104 and the pair of second grooves 125. As a result, it is possible to prevent the first contact piece 181A from falling out from between the pair of first grooves 104 and the pair of second grooves 125.

[0097] The pair of connecting pieces 126 can be connected to the recess R2 of the rail section R (see Figure 10). Each of the pair of connecting pieces 126 protrudes outward from the center of the first hole 123. Specifically, the connecting pieces 126 protrude in the direction in which the first contact piece 181A extends. The connecting pieces 126 are, for example, rectangular in shape.

[0098] The second cylindrical portion 122 is in contact with the switching portion 130. The second cylindrical portion 122 extends from the connecting piece 126 toward the switching portion 130. In other words, the second cylindrical portion 122 separates the switching portion 130 from the connecting piece 126. As a result, the connecting piece 126 can be rotated even if there is an obstacle between the switching portion 130 and the connecting piece 126.

[0099] The second cylindrical portion 122 has a locking projection 124. The locking projection 124 extends toward the switching portion 130.

[0100] The first hole 123 penetrates from the first cylindrical portion 121 to the second cylindrical portion 122. Specifically, the first hole 123 penetrates the first cylindrical portion 121, the connecting piece 126, and the second cylindrical portion 122. The shape of the first hole 123 is, for example, roughly rectangular. Specifically, for example, the shape of the first hole 123 is cross-shaped. The bolt holding portion 110 is inserted through the first hole 123. Specifically, the rectangular tube portion 105 is inserted through the first hole 123. Because the roughly rectangular rectangular tube portion 105 is inserted through the roughly rectangular first hole 123, the bolt holding portion 110 does not rotate inside the first hole 123. The connecting portion 120 and the bolt holding portion 110 are then combined.

[0101] The first hole 123 has a pair of third grooves 127. The pair of third grooves 127 are arranged from the first cylindrical portion 121 to the second cylindrical portion 122. The third grooves 127 are continuous with the second groove 125. When the rectangular tube portion 105 is inserted through the first hole 123, the support base 105A and the pair of third grooves 127 face each other. Therefore, the intermediate piece 181B is held between the support base 105A and the third grooves 127. As a result, the relay terminal portion 181 can be prevented from falling off the connecting portion 120.

[0102] The switching section 130 has a third cylindrical section 131, a lever section 132, and a second hole section 133. The third cylindrical section 131 is in contact with the second cylindrical section 122. The outer shape of the third cylindrical section 131 is larger than that of the first cylindrical section 121 and larger than that of the second cylindrical section 122. The third cylindrical section 131 extends from the lever section 132 toward the second cylindrical section 122.

[0103] The switching section 130 has a third cylindrical section 131, a lever section 132, and a second hole section 133. The third cylindrical section 131 is in contact with the second cylindrical section 122. The outer shape of the third cylindrical section 131 is larger than that of the first cylindrical section 121 and larger than that of the second cylindrical section 122. The third cylindrical section 131 extends from the lever section 132 toward the second cylindrical section 122.

[0104] The presence of the third cylindrical portion 131 allows the connecting portion 120 to be positioned beyond any obstacles protruding from the rail portion R toward the mounting unit 3. These obstacles include, for example, polarity ribs. Polarity ribs serve as markers to prevent incorrect polarity mounting of the lighting fixture 1 to the rail portion R. Without the third cylindrical portion 131, the connecting portion may collide with the polarity ribs, preventing rotation. In other words, the polarity ribs may hinder the connection between the connecting portion and the rail portion R. Furthermore, the polarity ribs may cause the lighting fixture 1 to be tilted relative to the rail portion R. However, the presence of the third cylindrical portion 131 allows the connecting portion 120 to be positioned beyond the polarity ribs. As a result, the obstruction of rotation of the connecting portion 120 by the polarity ribs is reduced. Moreover, it is possible to prevent the lighting fixture 1 from being positioned in a tilted position relative to the rail portion R. It is preferable that the height of the extended third cylindrical portion 131 is greater than the height of the polarity ribs.

[0105] Furthermore, when the lighting fixture 1 is placed at the end of the rail section R, the closing member that closes the end of the rail section R (a terminal part called a finisher, or a connecting part called a joiner) may interfere with the connecting part. In other words, the closing member of the rail section R and the connecting part may collide, preventing the connecting part from rotating. However, by having the third cylindrical section 131, the connecting part 120 can be positioned beyond the interfering portion of the closing member of the rail section R. As a result, the obstruction of the rotation of the connecting part 120 by the closing member of the rail section R can be reduced. In addition, the lighting fixture 1 can be attached to the end of the rail section R.

[0106] The third cylindrical portion 131 has locking recesses 137. The locking recesses 137 are formed on the third cylindrical portion 131 at predetermined angle intervals. The predetermined angle is, for example, 90 degrees. The locking recesses 137 are locked onto the locking projections 124 of the second cylindrical portion 122. Therefore, the locking recesses 137 define the position for attaching the connecting portion 120 to the switching portion 130. As a result, it is possible to prevent attaching the connecting portion 120 to the switching portion 130 in the wrong position.

[0107] The lever portion 132 has a fourth cylindrical portion 136 and an operating portion 138. The fourth cylindrical portion 136 extends from the third cylindrical portion 131 toward the plug base portion 140.

[0108] The operating section 138 extends from the fourth cylindrical section 136. The operating section 138 is a rectangular plate shape. The operating section 138 has a first surface 138A, a second surface 138B, a third surface 138C, a fourth surface 138D, and a fifth surface 138E.

[0109] The first surface 138A faces the rail section R.

[0110] The second surface 138B is the surface opposite to the first surface 138A. The second surface 138B faces the plug base portion 140. The second surface 138B has a second engaging portion 138F. The second engaging portion 138F is an engaging recess. The second engaging portion 138F will be described later.

[0111] The third surface 138C is located between the first surface 138A and the second surface 138B. The third surface 138C is located closer to the pivot axis AX than the fourth surface 138D.

[0112] The fourth face 138D is the face opposite the third face 138C and is located between the first face 138A and the second face 138B.

[0113] The fifth surface 138E is located between the first surface 138A and the second surface 138B, and between the third surface 138C and the fourth surface 138D. The fifth surface 138E is inclined in the direction toward the pivot axis AX from the fourth surface 138D. Therefore, a finger can be placed on the inclined fifth surface 138E. As a result, it is possible to prevent the finger placed on the fifth surface 138E from slipping off the fifth surface 138E when rotating the operating part 138.

[0114] Furthermore, the fifth surface 138E has a groove 139 that extends from the first surface 138A towards the second surface 138B. Therefore, a fingernail can be gripped into the groove 139 of the inclined fifth surface 138E. As a result, the finger placed on the operating part 138 is less likely to slip, and the operating part 138 can be easily rotated.

[0115] The second hole 133 penetrates from the third cylindrical portion 131 to the fourth cylindrical portion 136. The shape of the second hole 133 is, for example, roughly rectangular. Specifically, for example, the shape of the second hole 133 is cross-shaped. The rectangular tube portion 105 is inserted through the second hole 133. Because the roughly rectangular rectangular tube portion 105 is inserted through the roughly rectangular second hole 133, the bolt holding portion 110 does not rotate inside the second hole 133. The connecting portion 120, the bolt holding portion 110, and the switching portion 130 are then combined.

[0116] The second hole 133 has a pair of fourth grooves 135. The pair of fourth grooves 135 are arranged from the third cylindrical portion 131 to the fourth cylindrical portion 136. The fourth grooves 135 are continuous with the third groove 127. In other words, the fourth grooves 135 are continuous with the second groove 125 and the third groove 127. When the rectangular tube portion 105 is inserted through the second hole 133, the support base 105A and the pair of fourth grooves 135 face each other. Therefore, the intermediate piece 181B is held between the support base 105A and the pair of fourth grooves 135. As a result, the relay terminal portion 181 can be prevented from falling out of the switching portion 130.

[0117] The main body 141 of the plug base 140 further includes a third support plate 143, a third rising wall 147, and a pair of mounting parts 149.

[0118] The third support plate 143 faces the rail section R. The third support plate 143 faces the rail section R at a position further away than the first support plate 142. The third support plate 143 faces the rail section R at a position closer than the second support plate 144. Also, the third support plate 143 faces the third cylindrical section 131. The third support plate 143 is in contact with the fourth cylindrical section 136.

[0119] The third support plate 143 has a through hole 143A. The through hole 143A connects the outside of the plug base portion 140 to the inside of the plug base portion 140. In other words, the through hole 143A connects the outside of the mounting unit 3 to the inside of the mounting unit 3. The relay terminal portion 181 is inserted through the through hole 143A. Specifically, the second contact piece 181C of the relay terminal portion 181 is inserted through the through hole 143A. That is, the second contact piece 181C inserted through the through hole 143A is located inside the mounting unit 3.

[0120] The third rising wall 147 extends from the third support plate 143 toward the first support plate 142.

[0121] The pair of mounting parts 149 attach the plug part 100 to the mounting unit 3. Specifically, the pair of mounting parts 149 fix the plug part 100 to the upper surface 203 of the mounting base 200. The pair of mounting parts 149 are connected to the first support plate 142.

[0122] Furthermore, the first rising wall 145 can face the third surface 138C of the operating section 138. In other words, the first rising wall 145 restricts the rotation of the switching section 130. Specifically, the first rising wall 145 restricts the rotation of the switching section 130, which rotates in the second rotation direction AX2 when the connecting section 120 is in the first position. The second rotation direction AX2 indicates the direction in which the switching section 130 rotates around the rotation axis AX, and the connecting section 120 moves from the second position to the first position. Therefore, the switching section 130 does not rotate beyond the first rising wall 145. In other words, the rotation of the switching section 130 can be restricted when the connecting section 120 is in the first position.

[0123] Furthermore, the second support plate 144 has a first engaging portion 144A. The first engaging portion 144A is positioned at the location where the connecting portion 120 is in a first state, or at the location where the connecting portion 120 is in a second state. The first engaging portion 144A engages with the second engaging portion 138F. As a result, it is possible to inform the user that the connection state changes at the position where the first engaging portion 144A and the second engaging portion 138F engage.

[0124] The first engaging portion 144A is an engaging projection. The size of the engaging projection of the first engaging portion 144A is smaller than the size of the engaging recess of the second engaging portion 138F. In other words, the size of the engaging recess of the second engaging portion 138F is larger than the size of the engaging projection of the first engaging portion 144A. Therefore, a gap is created between the engaging recess of the second engaging portion 138F and the engaging projection of the first engaging portion 144A. In other words, there is play between the engaging recess of the second engaging portion 138F and the engaging projection of the first engaging portion 144A. This means that when operating the switching portion 130, the switching portion 130 can easily move until the engaging recess of the second engaging portion 138F contacts the engaging projection of the first engaging portion 144A. Therefore, the switching portion 130 can be moved within the range of the gap, allowing the user's fingers to grip the switching portion 130. Consequently, the switching portion 130 can be changed to a position that makes it easy to rotate. As a result, the operation of the switching portion 130 becomes easier. Furthermore, compared to the case where the user places their fingers on the switching part 130 without moving the switching part 130, the range over which the user can place their fingers on the switching part 130 increases, allowing the switching part 130 to be rotated with less force.

[0125] The first engaging portion 144A includes a first engaging projection 144B and a second engaging projection 144C. The first engaging projection 144B engages with the engaging recess of the second engaging portion 138F. Specifically, when the rotation of the switching portion 130 is restricted by the first restricting portion 148, the first engaging projection 144B engages with the engaging recess of the second engaging portion 138F. The second engaging projection 144C is positioned on the second support plate 144 at a different position from where the first engaging projection 144B is positioned. The second engaging projection 144C engages with the engaging recess of the second engaging portion 138F. Specifically, when the rotation of the switching portion 130 is restricted by the first rising wall 145, the second engaging projection 144C engages with the engaging recess of the second engaging portion 138F. Therefore, when the first engaging projection 144B engages with the engaging recess of the second engaging portion 138F, the user is made aware that the connecting portion 120 has entered the first state. Similarly, when the second engaging projection 144C engages with the engaging recess of the second engaging portion 138F, the user is made aware that the connecting portion 120 has entered the second state. As a result, the user can easily recognize how far the switching portion 130 needs to be moved to change the connection state.

[0126] As shown in Figure 9, the first engaging projection 144B is positioned between the first rising wall 145 and the second rising wall 147. The second engaging projection 144C is positioned where the first rising wall 145 and the second rising wall 147 do not face each other.

[0127] The terminal support portion 150 has a main body portion 151 and a through hole 152. The main body portion 151 has a protruding portion 151A and a pair of fifth groove portions 153. The protruding portion 151A protrudes toward the switching portion 130. The shape of the protruding portion 151A is, for example, roughly rectangular. Specifically, for example, the shape of the protruding portion 151A is cross-shaped. The protruding portion 151A is inserted through the second hole portion 133. Because the roughly rectangular protruding portion 151A is inserted through the roughly rectangular second hole portion 133, the switching portion 130 and the terminal support portion 150 are combined. In other words, the connecting portion 120, the bolt holding portion 110, the switching portion 130 and the terminal support portion 150 are combined.

[0128] The pair of fifth grooves 153 are arranged in the direction in which the through hole 152 extends. The fifth grooves 153 hold the second contact piece 181C of the intermediate terminal portion 181. As a result, it is possible to prevent the intermediate terminal portion 181 from falling off the terminal support portion 150.

[0129] The through hole 152 penetrates the main body portion 151. The cylindrical portion 106 of the bolt holding portion 110 is inserted through the through hole 152.

[0130] The conductive part 160 has a main body 161, a through hole 163, and a pair of conductive terminals 182.

[0131] A pair of conductive terminals 182 are held in the main body 161. Each of the pair of conductive terminals 182 has a first contact portion 182A and a second contact portion 182B. The first contact portion 182A is located inside the main body 161. The first contact portion 182A can contact the second contact piece 181C. Specifically, as shown in Figure 3, when the rail portion R and the connecting portion 120 are connected in a first position, the first contact portion 182A contacts the second contact piece 181C. In other words, the external power relayed by the relay terminal portion 181 is transmitted to the conductive terminals 182. Therefore, the external power from the external power supply can be supplied to the light source unit 2a.

[0132] The second contact portion 182B is connected to one end of the power line 240 (see Figure 10). The second contact portion 182B is located outside the main body portion 161.

[0133] The main body 161 holds a pair of conductive terminals 182. The main body 161 is box-shaped. A through hole 163 is located in the bottom wall of the main body 161.

[0134] The side wall 161B has a pair of terminal holding portions 162. Each of the pair of terminal holding portions 162 holds a conductive terminal 182. Each of the pair of terminal holding portions 162 has a first slit 162A and a second slit 162B. The second contact portion 182B of the conductive terminal 182 is inserted through the first slit 162A. The first contact portion 182A of the conductive terminal 182 is inserted through the second slit 162B.

[0135] The nut holding portion 170 has a main body portion 171 and a through hole 174. The main body portion 171 holds a nut (not shown). The nut is fastened with a bolt 101A inserted through the through hole 103 of the bolt holding portion 110. The through hole 174 passes through the main body portion 171.

[0136] <Embodiment 2> Figure 12 is a perspective view of the lighting fixture 1 according to Embodiment 2 in its first position. Figure 13 is a perspective view of the lighting fixture 1 according to Embodiment 2 in its second position. Figure 14 is a plan view of the lighting fixture 1 according to Embodiment 2 in its first position. Figure 15 is a plan view of the lighting fixture 1 according to Embodiment 2 in its second position. Figure 16 shows the XVI-XVI cross-section of the lighting fixture 1 shown in Figure 15. In Figures 12 to 16, the same or corresponding parts as in Figures 1 to 11 are denoted by the same reference numerals and will not be repeated in the description.

[0137] The difference between the lighting fixture 1 according to Embodiment 1 and the lighting fixture 1 according to Embodiment 2 lies in the size of the mounting unit 3. The difference in the size of the mounting unit 3 is due to the difference in the size of the line lighting L1 connected to the lighting fixture 1. For example, the line lighting L1 of Embodiment 1 has dimensions D11 (Figure 5) of approximately 40 mm and dimensions D21 (Figure 11) of approximately 80 mm. In contrast, the line lighting L1 of Embodiment 2 has dimensions D11 (Figure 14) of approximately 25 mm and dimensions D21 (Figure 16) of approximately 50 mm.

[0138] As described in Embodiment 1, in order to ensure visual continuity between the mounting unit 3 of the lighting fixture 1 and the line lighting L1 and to enhance the sense of visual unity, it is preferable to make the size of the mounting unit 3, particularly dimensions D10 (Figure 5) and D20 (Figure 11), and the size of the line lighting L1, particularly dimensions D11 (Figure 5) and D21 (Figure 11), approximately the same. Therefore, in Embodiment 2 as well, as shown in Figure 14, the dimension D10 of the mounting unit 3 and the dimension D11 of the line lighting L1 are approximately the same. Also, as shown in Figure 16, the dimension D20 of the mounting unit 3 and the dimension D21 of the line lighting L1 are approximately the same.

[0139] The dimensions of the luminaire body 2 and the connecting arm portion 4 are the same for the lighting fixture 1 according to Embodiment 1 and the lighting fixture 1 according to Embodiment 2. Similarly, the dimensions of the plug portion 100 are the same for both the lighting fixture 1 according to Embodiment 1 and the lighting fixture 1 according to Embodiment 2. Therefore, both the lighting fixture 1 according to Embodiment 1 and the lighting fixture 1 according to Embodiment 2 can be attached to the rail portion R. Furthermore, most of the components constituting the lighting fixture 1 can be common to both Embodiments 1 and 2.

[0140] <Embodiment 3> Figure 17 is a perspective view of the lighting fixture 1 according to Embodiment 3. In Figure 17, the same or corresponding parts as those in Figures 1 to 16 are denoted by the same reference numerals and will not be described again.

[0141] In embodiments 1 and 2, the lighting fixture 1 was mounted on the rail section R. Embodiment 3 illustrates a configuration in which the lighting fixture 1 is mounted, for example, on the ceiling surface of a room in a building. The ceiling surface is an example of a mounting body. In embodiment 3, the line lighting L1 is also mounted on the ceiling surface and connected to the lighting fixture 1.

[0142] As shown in Figure 17, the upper surface 203 of the mounting unit 3 has a wire insertion hole 203A and screw holes 203B and 203C.

[0143] The wire insertion hole 203A is a hole for drawing a power line (not shown) connected to an external power source into the interior of the mounting unit 3. The power line drawn into the interior of the mounting unit 3 is guided to the light fixture body 2 through the communication section 413 of the connecting arm section 4.

[0144] Screws (not shown) for fastening the mounting unit 3 to the ceiling surface are inserted through screw holes 203B and 203C. The mounting unit 3 is attached to the ceiling surface by these screws (not shown).

[0145] Furthermore, the mounting body is not limited to the rail section R and the ceiling surface. Also, the mounting structure for attaching the lighting fixture 1 to the mounting body is not limited to the plug section 100 and the screw holes 203B and 203C. It is possible to provide a mounting structure on the mounting unit 3 that is appropriate to the structure of the mounting body.

[0146] The embodiments have been described above with reference to the drawings (Figures 1 to 17). However, the present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from its essence.

[0147] The drawings are schematic representations of each component for ease of understanding. Therefore, the thickness, length, etc., of each component shown may differ from the actual dimensions due to the limitations of drawing creation. [Industrial applicability]

[0148] This invention provides a lighting fixture and has industrial applicability. [Explanation of symbols]

[0149] 1 Lighting fixtures 2 Light fixture body 3. Mounting Unit 3A enclosure 3B, 3C recess 211 1st wall 212 Second wall 213 Third wall D10, D11, D20, D21 dimensions L1 Line Lighting L1A 1st outer surface L1B 2nd outer surface L1C 3rd outer surface R rail section (mounting body)

Claims

1. A lighting fixture connected to a rectangular parallelepiped line of lighting, A mounting unit that is attached to the mounting body from below and connected to the line lighting, The light fixture body connected to the aforementioned mounting unit and Equipped with, The aforementioned mounting unit has a housing, The housing has a recess on the side facing the line lighting that accommodates the end of the line lighting, The aforementioned light fixture body is a lighting fixture located below the aforementioned housing.

2. The recess has a first wall and a second wall that are parallel to the longitudinal direction of the line lighting and face each other. The lighting fixture according to claim 1, wherein each of the first wall and the second wall protrudes from the side surface of the housing.

3. The inner surface of the first wall faces the first outer surface of the line lighting, The inner surface of the second wall faces the second outer surface of the line lighting, The lighting fixture according to claim 2, wherein the distance from the inner surface of the first wall to the inner surface of the second wall in the recess is greater than the distance from the first outer surface to the second outer surface in the line lighting.

4. The recess has a third wall connecting the first wall and the second wall, The lighting fixture according to claim 2 or claim 3, wherein the third wall is located on the side of the luminaire body that is closer to the mounting body.

5. The inner surface of the third wall faces the third outer surface of the line lighting, The lighting fixture according to claim 4, wherein the dimension from the inner surface of the third wall to the upper surface of the mounting unit in a direction perpendicular to the third wall is greater than the dimension of the line lighting in a direction perpendicular to the third outer surface.

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