JP7701141B2 - Connecting elements and lighting systems - Google Patents

Description

The present invention relates to a connecting member and a lighting system.

The lighting device described in Patent Document 1 is elongated. The lighting device includes a main body and an LED module (light source unit) that is attached to the main body. The LED module is composed of two individual LED modules.

JP 2015-53212 A

However, the lighting device described in Patent Document 1 does not include a member for connecting multiple lighting devices in the longitudinal direction. Therefore, there is a possibility that adjacent lighting devices may be misaligned. In other words, there is a possibility that the LED modules included in adjacent lighting devices may be misaligned.

The present invention has been made in consideration of the above problems, and its purpose is to provide a connecting member and a lighting system that can suppress misalignment of the second light source unit relative to the first light source unit.

The connecting member disclosed in the present application connects a first light source unit including a first light source side engaging portion and a second light source unit including a second light source side engaging portion. The connecting member includes a base portion and at least one wall portion. In a connected state in which the connecting member connects the first light source unit and the second light source unit, the base portion extends along a first direction from the first light source unit toward the second light source unit and spans the first light source unit and the second light source unit. At least one wall portion extends from the base portion in a second direction intersecting the first direction. The wall portion includes a first engaging portion and a second engaging portion aligned in the first direction. In the connected state, the first engaging portion engages with the first light source side engaging portion. In the connected state, the second engaging portion engages with the second light source side engaging portion.

The lighting system disclosed in this application comprises the connecting member described above, the first light source unit, and the second light source unit.

The present invention can suppress misalignment of the second light source unit relative to the first light source unit.

FIG. 1 is a perspective view of a connection system according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing a first lighting fixture according to the present embodiment. FIG. 2 is a perspective view showing a connecting member according to the embodiment. 4 is a front view showing a connecting member that connects the first light source unit and the second light source unit according to the embodiment. FIG. FIG. 2 is a perspective view showing the lighting system according to the embodiment in a state before the first light source unit and the second light source unit are connected by a connecting member. 4 is a perspective view showing a state in which a first light source unit and a second light source unit according to the embodiment are connected to a connecting member. FIG.

Embodiments of the present invention will be described below with reference to the drawings. Note that in the drawings, the same or corresponding parts will be given the same reference symbols and descriptions will not be repeated.

First, the lighting system 1 of this embodiment will be described with reference to FIG. 1. FIG. 1 is a perspective view showing the lighting system 1 according to this embodiment. The lighting system 1 of this embodiment is used, for example, as a base light or indirect lighting. In this embodiment, the lighting system 1 is used by being suspended from a ceiling surface. Alternatively, the lighting system 1 of this embodiment is installed, for example, on a ceiling surface, a wall surface, or a floor surface. The ceiling surface may be an inclined ceiling surface.

As shown in FIG. 1, the lighting system 1 includes a connecting member 10, a first lighting fixture 100 including a first light source unit 120, and a second lighting fixture 200 including a second light source unit 220. The connecting member 10 connects the first light source unit 120 and the second light source unit 220. The lighting system 1 shown in FIG. 1 is in a connected state in which the connecting member 10 connects the first light source unit 120 and the second light source unit 220.

In this embodiment, for example, in the connected state, the first lighting device 100 and the second lighting device 200 are in contact. On the other hand, in the connected state, the first light source unit 120 and the second light source unit 220 are spaced apart. Specifically, in the connected state, the first light source unit 120 and the second light source unit 220 are arranged such that a gap G is provided between the first light source unit 120 and the second light source unit 220.

In this embodiment, the first lighting device 100 has a substantially rectangular parallelepiped shape. The first lighting device 100 further includes a first housing 110 and a first housing closing portion 130.

The first housing 110 has a first housing base 111 and a first housing wall 112. Specifically, the first housing 110 has one first housing base 111 and two first housing walls 112. In the connected state, the first housing base 111 extends along a first direction D1 from the first light source unit 120 toward the second light source unit 220. In the connected state, the first housing wall 112 extends from the first housing base 111 in a second direction D2 that intersects with the first direction D1. In this embodiment, the second direction D2 is perpendicular to the first direction D1. In addition, the two first housing walls 112, in the connected state, face a third direction D3 that intersects with the first direction D1 and the second direction D2. In this embodiment, the third direction D3 is perpendicular to the first direction D1 and the second direction D2.

The first housing 110 houses the first light source unit 120. In this embodiment, when the first housing 110 houses the first light source unit 120, the side of the first light source unit 120 faces the inner surface of the first housing wall portion 112.

The first housing 110 has an open surface facing the first housing base portion 111. In other words, the first housing 110 is open in the second direction D2 in the connected state. That is, the first housing 110 has an open portion 110c facing the first housing base portion 111.

Of the longitudinal ends of the first housing 110, the first end 110a is adjacent to the second lighting device 200 in the connected state. On the other hand, of the longitudinal ends of the first housing 110, the second end 110b is the end farther from the second lighting device 200 than the first end 110a in the connected state. The first end 110a and the second end 110b are open (see FIG. 2).

The first housing closing part 130 is, for example, an end cap. The first housing closing part 130 is attached to the second end 110b and closes the open second end 110b (see FIG. 2). It is preferable that the first housing closing part 130 has light-blocking properties.

The first light source unit 120 emits light. The light emitted by the first light source unit 120 is emitted from the opening 110c of the first housing 110. The first light source unit 120 includes a first light source cover 121 and a first light source side engagement portion 190.

The first light source cover 121 is made of, for example, resin. The first light source cover 121 has an opposing surface 121e that faces the open portion 110c when the first light source unit 120 is housed in the first housing 110.

In this embodiment, the first light source unit 120 includes two first light source side engagement parts 190. Hereinafter, of the two first light source side engagement parts 190, the first light source side engagement part 190 located on the first end 110a side of the first housing 110 in the connected state may be referred to as the first light source side engagement part 190a. Also, of the two first light source side engagement parts 190, the first light source side engagement part 190 located on the second end 110b side of the first housing 110 in the connected state may be referred to as the first light source side engagement part 190b.

The second lighting device 200 further includes a second housing 210 and a second housing closing portion 230. In this embodiment, the second lighting device 200 has a substantially rectangular parallelepiped shape. In this embodiment, the second lighting device 200 and the first lighting device 100 are adjacent to each other in the first direction D1 when connected.

The second housing 210 has a second housing base portion 211 and a second housing wall portion 212. Specifically, the second housing 210 has one second housing base portion 211 and two second housing walls 212. In the connected state, the second housing base portion 211 extends along the first direction D1. The second housing wall portion 212 extends from the second housing base portion 211 in the second direction D2. In addition, the two second housing walls 212 face each other in the third direction D3.

The second housing 210 houses the second light source unit 220. In this embodiment, when the second housing 210 houses the second light source unit 220, the side of the second light source unit 220 faces the inner surface of the second housing wall portion 212.

The second housing 210 has an open surface facing the second housing base portion 211. In other words, the second housing 210 is open in the second direction D2 in the connected state. That is, the second housing 210 has an open portion 210c facing the second housing base portion 211.

Of the longitudinal ends of the second housing 210, the second end 210b is adjacent to the first lighting device 100 in the connected state. That is, in the connected state, the second end 210b and the first end 110a of the first housing 110 are adjacent to each other. On the other hand, of the longitudinal ends of the second housing 210, the first end 210a is an end that is farther from the first lighting device 100 than the second end 210b in the connected state. As with the first housing 110, the first end 210a and the second end 210b of the second housing 210 are open. Note that, in the connected state, the second end 210b and the first end 110a are in contact, for example. That is, the first housing 110 and the second housing 210 are in contact, for example.

The second housing closing part 230 is, for example, an end cap. The second housing closing part 230 is attached to the first end 210a in the same manner as the first housing closing part 130, and closes the open first end 210a. It is preferable that the second housing closing part 230 has light-blocking properties.

The second light source unit 220 emits light. The light emitted by the second light source unit 220 is emitted from the opening 210c of the second housing 210. The second light source unit 220 includes a second light source cover 221 and a second light source side engagement portion 290.

The second light source cover 221 is made of, for example, resin. The second light source cover 221 has an opposing surface 221e that faces the open portion 210c when the second light source unit 220 is housed in the second housing 210.

The position of the opposing surface 221e in the second direction D2 is approximately the same as the position of the opposing surface 121e of the first light source cover 121 in the second direction D2. In addition, the position of the opposing surface 221e in the third direction D3 is approximately the same as the position of the opposing surface 121e in the third direction D3. That is, in this embodiment, the opposing surface 121e and the opposing surface 221e are arranged on approximately a straight line.

In this embodiment, the second light source unit 220 includes two second light source side engagement parts 290. Hereinafter, of the two second light source side engagement parts 290, the second light source side engagement part 290 located on the first end 210a side of the second housing 210 in the connected state may be referred to as the second light source side engagement part 290a. Also, of the two second light source side engagement parts 290, the second light source side engagement part 290 located on the second end 210b side of the second housing 210 in the connected state may be referred to as the second light source side engagement part 290b.

The connecting member 10 is made of, for example, resin. The connecting member 10 includes a base portion 20 and at least one wall portion 30.

When in the connected state, the base portion 20 extends along the first direction D1. Furthermore, when in the connected state, the base portion 20 spans the first light source unit 120 and the second light source unit 220.

At least one wall portion 30 extends from the base portion 20 in the second direction D2. The wall portion 30 also includes a first engagement portion 31 and a second engagement portion 32 aligned in the first direction D1. In this embodiment, in FIG. 1, the first engagement portion 31 is located to the left of the second engagement portion 32.

In the connected state, the first engagement portion 31 engages with the first light source side engagement portion 190a. Also, in the connected state, the second engagement portion 32 engages with the second light source side engagement portion 290b. Therefore, the first light source side engagement portion 190a and the second light source side engagement portion 290b can be restricted from moving relative to the connecting member 10. As a result, the positional deviation of the second light source unit 220 relative to the first light source unit 120 can be suppressed. For example, the position of the second light source unit 220 relative to the position of the first light source unit 120 can be suppressed from shifting in the first direction D1, the second direction D2, or the third direction D3.

By suppressing misalignment between the first light source unit 120 and the second light source unit 220, the positions of the opposing surfaces 121e and 221e, which are arranged in a substantially straight line, can be maintained. Specifically, the position of the opposing surface 221e of the second light source cover 221 can be prevented from shifting in the first direction D1, the second direction D2, or the third direction D3 relative to the position of the opposing surface 121e of the first light source cover 121. As a result, the aesthetic appearance of the lighting system 1 can be improved when the first light source unit 120 and the second light source unit 220 emit light in the connected state.

In addition, compared to a case where the connecting member 10 does not connect the first light source unit 120 and the second light source unit 220, the extension direction of the second light source unit 220 can be prevented from tilting relative to the extension direction of the first light source unit 120. That is, the extension direction of the second light source cover 221 can be prevented from tilting relative to the extension direction of the first light source cover 121. Specifically, the second light source cover 221 can be prevented from tilting to the right in the figure, to the left in the figure, to the upper side in the figure, or to the lower side in the figure, starting from the boundary portion between the first end 110a of the first housing 110 and the second end 210b of the second housing 210. Also, at least one of the extension directions of the first light source unit 120 and the extension direction of the second light source unit 220 can be prevented from tilting relative to the first direction D1.

In this embodiment, each of the first housing 110 and the second housing 210 has a light-blocking property. Therefore, it is possible to prevent light emitted by at least one of the first light source unit 120 and the second light source unit 220 from being emitted through the first housing wall portion 112 and the second housing wall portion 212. As a result, it is possible to highlight the light emitted from the opening portion 110c.

Here, in this embodiment, it is preferable that each of the inner surfaces of the first housing 110 and the second housing 210 is configured to reflect light emitted by at least one of the first light source unit 120 and the second light source unit 220. The light-reflecting configuration is, for example, a configuration having a color that easily reflects light. Specifically, the light-reflecting configuration is, for example, a configuration formed of a white material, a configuration that is painted white, or a configuration that is a mirror surface. The white material is, for example, resin. Therefore, the light efficiency of the lighting system 1 can be improved compared to a case in which each of the inner surfaces of the first housing and the second housing is configured to reflect light less easily. The light-reflecting configuration is, for example, a configuration having a color that easily absorbs light. Specifically, the light-reflecting configuration is, for example, a configuration formed of a black material, or a configuration that is painted black.

In the following, in this embodiment, in order to facilitate understanding of the invention, in the connected state, the side on which the first light source unit 120 is arranged is defined as the "left side", and the side on which the second light source unit 220 is arranged is defined as the "right side", to define the left-right direction. That is, in this embodiment, the direction from the left side to the right side corresponds to the first direction D1. Also, in the connected state, the side on which the base end side of the wall portion 30 of the connecting member 10 is arranged is defined as the "upper side", and the side on which the tip end of the wall portion 30 is arranged is defined as the "lower side", to define the up-down direction. That is, in this embodiment, the direction from the upper side to the lower side corresponds to the second direction D2. Also, when the lighting system 1 is viewed so that the first light source unit 120 is arranged on the left side and the second light source unit 220 is arranged on the right side, the front side is defined as the "front side", and the opposite side is defined as the "rear side". That is, in this embodiment, the front-rear direction corresponds to the third direction D3. That is, FIG. 1 shows the lighting system 1 viewed from below, diagonally forward to the left. However, these orientations do not limit the orientation of the lighting system 1 of the present invention during manufacturing, installation, and use.

Next, the first lighting fixture 100 of this embodiment will be described with reference to FIG. 2. FIG. 2 is an exploded perspective view of the first lighting fixture 100 according to this embodiment. In particular, FIG. 2 shows the first lighting fixture 100 as viewed from below, diagonally forward and to the left. Note that the configuration of the first lighting fixture 100 and the configuration of the second lighting fixture 200 are similar, and therefore a description of the second lighting fixture 200 will be omitted.

As shown in FIG. 2, the first housing 110 has a generally U-shape in side view. Specifically, the first housing 110 has a generally U-shape with sharp corners in side view.

The first light source unit 120 further includes a light emitting portion 122, a frame member 170, a power supply unit 140, two mounting brackets 150, a first terminal block 160a, a second terminal block 160b, a first cover closing member 180a, a second cover closing member 180b, a first pressing member 185a, and a second pressing member 185b.

The light-emitting unit 122 has a wiring board 122a and multiple light sources 122b.

When connected, the wiring board 122a has a generally rectangular shape that is long in the first direction D1. In this embodiment, the wiring board 122a has a generally flat plate shape.

The light source 122b emits light. In this embodiment, the light source 122b has an LED (Light Emitting Diode) element as a light-emitting element. More specifically, the light source 122b is, for example, a SMD (surface mount device) or a COB (chip on board).

The light source 122b is mounted on the wiring board 122a. Specifically, the light source 122b is mounted on the wiring board 122a so that the light emitting surface of the light emitting element faces the inner surface of the first light source cover 121. Wiring for supplying power to the light source 122b is formed on the wiring board 122a.

In this embodiment, the multiple light sources 122b are arranged in a row along the first direction D1 in the connected state. However, the arrangement of the multiple light sources 122b is not limited to a single row. The multiple light sources 122b may be arranged in two or more rows along the first direction D1, or may be arranged in a staggered pattern.

The frame member 170 is a plate-like member, and has a generally rectangular shape that is long in the first direction D1 when connected. The light-emitting unit 122 is attached to the frame member 170. Specifically, the light-emitting unit 122 is attached to the lower surface of the frame member 170. More specifically, the light-emitting unit 122 is attached to the frame member 170 so that the light source 122b faces the inner surface of the opposing surface 121e of the first light source cover 121. The light-emitting unit 122 may be adhered to the frame member 170 by, for example, an adhesive, or may be fixed to the frame member 170 by a fastening member such as a screw.

The frame member 170 may be a member made of a metal such as aluminum. In this embodiment, the frame member 170 is made of a metal and functions as a heat sink for the light emitting unit 122. The frame member 170 is formed, for example, by an extrusion molding method. By forming the frame member 170 by an extrusion molding method, the cross-sectional shape of the frame member 170 becomes constant from one end to the other end in the longitudinal direction of the frame member 170.

The first light source cover 121 covers the light-emitting unit 122. More specifically, the first light source cover 121 is attached to the frame member 170 and covers the light-emitting unit 122 from below. The first light source cover 121 is, for example, a shade or a diffusion cover. The first light source cover 121 is transparent or translucent, and transmits light emitted from the light-emitting unit 122. The first light source cover 121 is made of, for example, a milky translucent material.

In more detail, the first light source cover 121 is a generally rectangular parallelepiped cylinder that is long in the first direction D1 when in a connected state. The first light source cover 121 also has a first cover opening end 121a located on the first end 110a side of the first housing 110, and a second cover opening end 121b located on the second end 110b side of the first housing 110. The first cover opening end 121a and the second cover opening end 121b are open.

When the first light source cover 121 is a diffusion cover, the first light source cover 121 may be formed, for example, by molding a resin containing a light diffusion material. Alternatively, the first light source cover 121 may be formed by performing a light diffusion treatment on the surface of a resin molded product molded from a transparent resin. Here, the light diffusion treatment includes, for example, a fine unevenness forming treatment and a translucent white painting treatment. The fine unevenness forming treatment is a treatment for forming fine unevenness on the surface of a resin molded product. The translucent white painting treatment is a treatment for painting a milky white paint having translucency on the surface of a resin molded product.

In this embodiment, the first light source cover 121 includes a main body 121m and two engaging portions 121f. The main body 121m and each of the two engaging portions 121f are joined. The two engaging portions 121f each protrude in the direction opposite to the second direction D2 from a pair of ends 121c of the main body 121m that are in the direction opposite to the second direction D2. The first light source cover 121 is attached to the frame member 170 by engaging the edges of the frame member 170 with the two engaging portions 121f, respectively.

The first cover closing member 180a closes the first cover opening end 121a. The first cover closing member 180a is made of, for example, synthetic resin. The second cover closing member 180b closes the second cover opening end 121b. The second cover closing member 180b is made of, for example, synthetic resin.

The first cover closing member 180a and the second cover closing member 180b may be the same color as the first light source cover 121. The first cover closing member 180a and the second cover closing member 180b are made of, for example, a milky white translucent material. By having the first cover closing member 180a and the second cover closing member 180b and the first light source cover 121 of the same color, a sense of unity can be obtained between the first light source cover 121, the first cover closing member 180a, and the second cover closing member 180b.

When the end of the first light source cover 121 on the side of the first cover opening end 121a extends in the first direction D1, the first cover closing member 180a is pressed in the first direction D1. Similarly, when the end of the first light source cover 121 on the side of the second cover opening end 121b extends in the fourth direction D4 opposite to the first direction D1, the second cover closing member 180b is pressed in the fourth direction D4.

The first cover closing member 180a is attached to the frame member 170 so as to be slidable in the first direction D1 and the fourth direction D4 (left-right direction). Therefore, when the first light source cover 121 thermally expands and the first cover closing member 180a is pressed in the first direction D1, the first cover closing member 180a moves in the first direction D1. In other words, the position of the first cover closing member 180a is displaced in the first direction D1.

Similarly, the second cover closing member 180b is attached to the frame member 170 so as to be slidable in the first direction D1 and the fourth direction D4. Therefore, when the first light source cover 121 thermally expands and the second cover closing member 180b is pressed in the fourth direction D4, the second cover closing member 180b moves in the fourth direction D4. In other words, the position of the second cover closing member 180b is displaced in the fourth direction D4.

The first pressing member 185a has elasticity. The first pressing member 185a applies a pressing force in the fourth direction D4 to the first cover closing member 180a in response to the deformation of the first light source cover 121 in the first direction D1. In more detail, when the first light source cover 121 thermally expands and the first cover closing member 180a moves in the first direction D1, the first pressing member 185a is compressed and deformed. Specifically, the first pressing member 185a is elastically deformed. Therefore, the first pressing member 185a tries to return to its original shape. As a result, a pressing force in the fourth direction D4 is applied to the first cover closing member 180a by the force of the first pressing member 185a trying to return to its original shape.

Similarly, the second pressing member 185b has elasticity. The second pressing member 185b applies a pressing force in the first direction D1 to the second cover closing member 180b in response to the deformation of the first light source cover 121 in the fourth direction D4. In more detail, when the first light source cover 121 thermally expands and the second cover closing member 180b moves in the fourth direction D4, the second pressing member 185b is compressed and deformed. Specifically, the second pressing member 185b is elastically deformed. Therefore, the second pressing member 185b tries to return to its original shape. As a result, a pressing force in the first direction D1 is applied to the second cover closing member 180b by the force of the second pressing member 185b trying to return to its original shape.

The first light source side engagement portion 190a restricts the movement of the first pressing member 185a in the first direction D1 when the first light source cover 121 thermally expands. Therefore, according to this embodiment, the first pressing member 185a elastically deforms more reliably when the first light source cover 121 thermally expands.

The first light source side engagement portion 190a of this embodiment has a first opposing member 191a and a first fastening member 192a. The first opposing member 191a faces the first pressing member 185a. More specifically, the first opposing member 191a is disposed at a position closer to the first cover closing member 180a than the first pressing member 185a, and faces the first pressing member 185a. The first fastening member 192a is fastened to the frame member 170 to fix the first opposing member 191a. The first fastening member 192a is, for example, a screw. By fixing the first opposing member 191a to the frame member 170, the movement of the first pressing member 185a in the first direction D1 can be more reliably restricted.

Similarly, the first light source side engagement portion 190b restricts the movement of the second pressing member 185b in the fourth direction D4 when the first light source cover 121 thermally expands. Therefore, according to this embodiment, the second pressing member 185b elastically deforms more reliably when the first light source cover 121 thermally expands.

The first light source side engagement portion 190b of this embodiment has a first opposing member 191b and a first fastening member 192b. The first opposing member 191b faces the second pressing member 185b. More specifically, the first opposing member 191b is disposed at a position closer to the second cover closing member 180b than the second pressing member 185b, and faces the second pressing member 185b. The first fastening member 192b is fastened to the frame member 170 to fix the first opposing member 191b. The first fastening member 192b is, for example, a screw. By fixing the first opposing member 191b to the frame member 170, the movement of the second pressing member 185b in the fourth direction D4 can be more reliably restricted.

The power supply device 140, the first terminal block 160a, and the second terminal block 160b are fixed to the frame member 170. More specifically, the power supply device 140, the first terminal block 160a, and the second terminal block 160b are fixed to the upper surface of the frame member 170. When the first light source unit 120 is housed in the first housing 110, the first terminal block 160a is closer to the first end 110a of the first housing 110 than the second terminal block 160b. Also, when the first light source unit 120 is housed in the first housing 110, the second terminal block 160b is closer to the second end 110b of the first housing 110 than the first terminal block 160a.

In this embodiment, one end of an external power line (not shown) that is drawn from the outside of the lighting system 1 into the inside of the first lighting device 100 is connected to one side of the second terminal block 160b. In addition, one end of an internal power line (not shown) that connects the second terminal block 160b to the power supply device 140 and one end of an internal power line PL1 (see FIG. 6) that connects the second terminal block 160b to the first terminal block 160a are connected to the other side of the second terminal block 160b.

An internal power line (not shown) connecting the second terminal block 160b and the power supply device 140 transmits the AC voltage transmitted through the external power line to the power supply device 140. The power supply device 140 generates power from the AC voltage to cause the light source 122b to emit light. The power supply device 140 of this embodiment generates, for example, a DC voltage from the AC voltage to cause the LED element to emit light.

The internal power line PL1 that connects the second terminal block 160b and the first terminal block 160a is pulled into one side of the first terminal block 160a and transmits the AC voltage transmitted through the external power line to the first terminal block 160a.

An internal power line PL2 (see FIG. 6) that connects the first terminal block 160a and the second terminal block 260b of the second lighting fixture 200 is connected to the other side of the first terminal block 160a. The internal power line PL2 is drawn into one side of the second terminal block 260b of the second lighting fixture 200 and transmits the AC voltage transmitted through the external power line to the second terminal block 260b of the second lighting fixture 200. An internal power line PL3 (see FIG. 6) that connects the second terminal block 260b and the power supply device (not shown) of the second lighting fixture 200 is connected to the other side of the second terminal block 260b. The internal power line PL3 transmits the AC voltage transmitted through the external power line to the power supply device of the second lighting fixture 200. The internal power line PL2 is an example of an "electric wire".

For example, the first light source unit 120 and the second light source unit 220 are aligned in the first direction D1, and the internal power line PL2 is pulled into the first terminal block 160a and the second terminal block 260b. Then, the first engagement portion 31 of the connecting member 10 is engaged with the first light source side engagement portion 190a, and the second engagement portion 32 is engaged with the second light source side engagement portion 290b. As a result, the connecting member 10 connects the first light source unit 120 and the second light source unit 220.

The two mounting brackets 150 are fixed to the frame member 170. More specifically, the two mounting brackets 150 are fixed to the upper surface of the frame member 170. The two mounting brackets 150 are members for attaching the first light source unit 120 to the first housing 110. The mounting brackets 150 have elasticity, for example. In this embodiment, one of the two mounting brackets 150 is disposed on the left side of the power supply device 140, and the other of the two mounting brackets 150 is disposed on the right side of the power supply device 140.

According to this embodiment, the first light source unit 120 is attached to the first housing 110 by the elastic force of the two mounting brackets 150. Similarly, the second light source unit 220 is attached to the second housing 210 by two mounting brackets (not shown). Therefore, the first light source unit 120 is detachable from the first housing 110, and the second light source unit 220 is detachable from the second housing 210. For example, after the connecting member 10 connects the first light source unit 120 and the second light source unit 220, the first light source unit 120 and the second light source unit 220 are inserted into the first housing 110 and the second housing 210 from the openings 110c and 210c. As a result, the first light source unit 120 is attached to the first housing 110, and the second light source unit 220 is attached to the second housing 210.

Next, the connecting member 10 will be described in detail with reference to FIG. 3. FIG. 3 is a perspective view of the connecting member 10 according to this embodiment. In particular, FIG. 3 shows the connecting member 10 as seen from below, diagonally forward and to the left.

As shown in FIG. 3, in this embodiment, the connecting member 10 has two walls 30. Hereinafter, the wall 30 located on the front side of the two walls 30 may be referred to as wall 30a. Also, the wall 30 located on the rear side of the two walls 30 may be referred to as wall 30b. Note that the configuration of wall 30a is similar to that of wall 30b, so the description of wall 30b will be omitted as appropriate.

The two walls 30 face each other in the third direction D3. That is, the walls 30a and 30b face each other in the third direction D3. Therefore, in the connected state, it is possible to prevent the position of the second light source unit 220 from shifting relative to the position of the first light source unit 120 on both one side (front side) and the other side (rear side) of the first light source unit 120 and the second light source unit 220.

In this embodiment, the first engaging portion 31 included in the wall portion 30a and the first engaging portion 31 included in the wall portion 30b face each other in the third direction D3. In addition, the second engaging portion 32 included in the wall portion 30a and the second engaging portion 32 included in the wall portion 30b face each other in the third direction D3. Hereinafter, the first engaging portion 31 included in the wall portion 30a may be referred to as the first engaging portion 31a, and the first engaging portion 31 included in the wall portion 30b may be referred to as the first engaging portion 31b. In addition, the second engaging portion 32 included in the wall portion 30a may be referred to as the second engaging portion 32a, and the second engaging portion 32 included in the wall portion 30b may be referred to as the second engaging portion 32b.

In this embodiment, the first engagement portion 31 includes a first inclined portion 311, a second inclined portion 312, a third inclined portion 313, and a fourth inclined portion 314. Hereinafter, the first inclined portion 311 included in the wall portion 30a may be described as the first inclined portion 311a, and the first inclined portion 311 included in the wall portion 30b may be described as the first inclined portion 311b. In addition, the second inclined portion 312 included in the wall portion 30a may be described as the second inclined portion 312a, and the second inclined portion 312 included in the wall portion 30b may be described as the second inclined portion 312b. Furthermore, the third inclined portion 313 included in the wall portion 30a may be described as the third inclined portion 313a, and the third inclined portion 313 included in the wall portion 30b may be described as the third inclined portion 313b. Furthermore, the fourth inclined portion 314 included in wall portion 30a may be referred to as the fourth inclined portion 314a, and the fourth inclined portion 314 included in wall portion 30b may be referred to as the fourth inclined portion 314b.

The first inclined portion 311 is inclined with respect to the first direction D1 and the second direction D2. The second inclined portion 312 is inclined with respect to the direction in which the first inclined portion 311 extends. Moreover, the second inclined portion 312 is inclined, for example, with respect to the first direction D1 and the second direction D2. Furthermore, in this embodiment, the inclination of the first inclined portion 311 with respect to the first direction D1 is smaller than, for example, the inclination of the second inclined portion 312 with respect to the first direction D1.

In this embodiment, for example, the first end 311c, which is one of the ends of the first inclined portion 311, and the second end 312c, which is one of the ends of the second inclined portion 312, are connected. In addition, the third end 311d, which is the other end of the first inclined portion 311, and the fourth end 312d, which is the other end of the second inclined portion 312, are separated. Therefore, when the first light source side engagement portion 190 (see FIG. 1) is inserted between the third end 311d and the fourth end 312d, the first light source side engagement portion 190 is guided by the first inclined portion 311 and the second inclined portion 312. As a result, it is easy to insert the first light source side engagement portion 190 into the first engagement portion 31. In addition, it is possible to prevent the first light source side engagement portion 190 from being inserted too far in the direction opposite to the second direction D2.

The third inclined portion 313 extends from the third end 311d in a direction away from the base portion 20. The third inclined portion 313 also extends from the third end 311d to the tip 30s of the wall portion 30. In other words, the tip 313e of the third inclined portion 313 is located at the tip 30s of the wall portion 30.

The fourth inclined portion 314 extends from the fourth end 312d in a direction away from the base portion 20. The fourth inclined portion 314 also extends from the fourth end 312d to the tip 30s of the wall portion 30. In other words, the tip 314e of the fourth inclined portion 314 is located at the tip 30s of the wall portion 30.

In addition, in this embodiment, the second engagement portion 32 includes a first inclined portion 321, a second inclined portion 322, a third inclined portion 323, and a fourth inclined portion 324. Hereinafter, the first inclined portion 321 included in the wall portion 30a may be described as the first inclined portion 321a, and the first inclined portion 321 included in the wall portion 30b may be described as the first inclined portion 321b. Also, the second inclined portion 322 included in the wall portion 30a may be described as the second inclined portion 322a, and the second inclined portion 322 included in the wall portion 30b may be described as the second inclined portion 322b. Furthermore, the third inclined portion 323 included in the wall portion 30a may be described as the third inclined portion 323a, and the third inclined portion 323 included in the wall portion 30b may be described as the third inclined portion 323b. Furthermore, the fourth inclined portion 324 included in wall portion 30a may be referred to as the fourth inclined portion 324a, and the fourth inclined portion 324 included in wall portion 30b may be referred to as the fourth inclined portion 324b.

The first inclined portion 321 is inclined with respect to the first direction D1 and the second direction D2. The second inclined portion 322 is inclined with respect to the direction in which the first inclined portion 321 extends. In this embodiment, the second inclined portion 322 is inclined with respect to the first direction D1 and the second direction D2. Furthermore, in this embodiment, the inclination of the first inclined portion 321 with respect to the first direction D1 is smaller than the inclination of the second inclined portion 322 with respect to the first direction D1.

In this embodiment, for example, the first end 321c, which is one of the ends of the first inclined portion 321, and the second end 322c, which is one of the ends of the second inclined portion 322, are connected. In addition, the third end 321d, which is the other end of the first inclined portion 321, and the fourth end 322d, which is the other end of the second inclined portion 322, are separated. Therefore, when the second light source side engagement portion 290 (see FIG. 1) is inserted between the third end 321d and the fourth end 322d, the second light source side engagement portion 290 is guided by the first inclined portion 321 and the second inclined portion 322. As a result, it is easy to insert the second light source side engagement portion 290 into the second engagement portion 32. In addition, it is possible to prevent the second light source side engagement portion 290 from being inserted too far in the direction opposite to the second direction D2.

The third inclined portion 323 extends from the third end 321d in a direction away from the base portion 20. The third inclined portion 323 also extends from the third end 321d to the tip 30s of the wall portion 30. In other words, the tip 323e of the third inclined portion 323 is located at the tip 30s of the wall portion 30.

The fourth inclined portion 324 extends from the fourth end 322d in a direction away from the base portion 20. The fourth inclined portion 324 also extends from the fourth end 322d to the tip 30s of the wall portion 30. In other words, the tip 324e of the fourth inclined portion 324 is located at the tip 30s of the wall portion 30.

The wall portion 30 further includes an intermediate portion 33 and a protruding portion 34. Hereinafter, the intermediate portion 33 included in the wall portion 30a may be referred to as intermediate portion 33a, and the intermediate portion 33b included in the wall portion 30b may be referred to as intermediate portion 33b. In addition, the protruding portion 34 included in the wall portion 30a may be referred to as protruding portion 34a, and the protruding portion 34 included in the wall portion 30b may be referred to as protruding portion 34b.

In this embodiment, the intermediate portion 33 is located midway between the first engagement portion 31 and the second engagement portion 32. That is, the intermediate portion 33 connects the first engagement portion 31 and the second engagement portion 32. In addition, the intermediate portion 33 is located, for example, at the center of the wall portion 30 in the first direction D1.

In addition, in this embodiment, the protruding portion 34 protrudes from the intermediate portion 33 in the second direction D2. Specifically, in this embodiment, the protruding portion 34 protrudes, for example, from the center of the intermediate portion 33 in the first direction D1 in the second direction D2.

In this embodiment, the tip 35 of the protrusion 34 has, for example, a flat surface. Also, in this embodiment, the flat surface of the tip 35 is approximately parallel to the base portion 20. However, the flat surface of the tip 35 does not have to be parallel to the base portion 20. Also, the tip 35 does not have to have a flat surface. For example, the tip 35 may have an uneven shape. Hereinafter, the tip 35 of the protrusion 34a may be referred to as tip 35a, and the tip 35 of the protrusion 34b may be referred to as tip 35b.

Next, referring to FIG. 4, the connecting member 10 that connects the first light source unit 120 and the second light source unit 220 will be described. FIG. 4 is an enlarged view of the periphery of the connecting member 10 of the lighting system 1 in the connected state. In detail, FIG. 4 shows the lighting system 1 as viewed from the front.

In this embodiment, the first engagement portion 31 has, for example, a concave shape. The second engagement portion 32 has, for example, a concave shape. The first engagement portion 31 and the second engagement portion 32 are, for example, line-symmetric with respect to a center line CL that passes through the center of the wall portion 30 in the first direction D1. However, the first engagement portion 31 and the second engagement portion 32 do not have to be line-symmetric with respect to the center line CL.

In this embodiment, for example, the third inclined portion 313 and the fourth inclined portion 314 are each inclined with respect to the second direction D2 so that the tip 313e of the third inclined portion 313 and the tip 314e of the fourth inclined portion 314 approach each other. Therefore, it is possible to prevent the first light source side engagement portion 190 from coming off the first engagement portion 31. As a result, the first light source side engagement portion 190 is stably supported by the third inclined portion 313 and the fourth inclined portion 314. Note that the tip 313e of the third inclined portion 313 and the tip 314e of the fourth inclined portion 314 are spaced apart.

Similarly, the third inclined portion 323 and the fourth inclined portion 324 are each inclined with respect to the second direction D2 so that the tip 323e of the third inclined portion 323 and the tip 324e of the fourth inclined portion 324 approach each other. Therefore, the second light source side engagement portion 290 that engages with the second engagement portion 32 is supported by the third inclined portion 323 and the fourth inclined portion 324. As a result, the second light source side engagement portion 290 and the second engagement portion 32 are stably engaged. Note that the tip 323e of the third inclined portion 323 and the tip 324e of the fourth inclined portion 324 are spaced apart.

In this embodiment, the first light source side engagement portion 190 has a convex shape. The first opposing member 191a of the first light source side engagement portion 190 includes a first inclined portion 194a, a second inclined portion 195a, a third inclined portion 196a, and a fourth inclined portion 197a.

In this embodiment, the first inclined portion 194a is inclined with respect to the first direction D1 and the second direction D2. In the connected state, the first inclined portion 194a faces the first inclined portion 311a of the first engagement portion 31. In this embodiment, the extension direction of the first inclined portion 194a and the extension direction of the first inclined portion 311a are approximately parallel in the connected state.

Similar to the first inclined portion 194a, the second inclined portion 195a is inclined with respect to the first direction D1 and the second direction D2. In the connected state, the second inclined portion 195a faces the second inclined portion 312a of the first engagement portion 31. In this embodiment, the extension direction of the second inclined portion 195a and the extension direction of the second inclined portion 312a are approximately parallel in the connected state.

Similarly to the first inclined portion 194a, the third inclined portion 196a is inclined with respect to the first direction D1 and the second direction D2. In the connected state, the third inclined portion 196a faces the third inclined portion 313a of the first engagement portion 31. In this embodiment, the extending direction of the third inclined portion 196a and the extending direction of the third inclined portion 313a are approximately parallel in the connected state.

Furthermore, like the first inclined portion 194a, the fourth inclined portion 197a is inclined with respect to the first direction D1 and the second direction D2. In the connected state, the fourth inclined portion 197a faces the fourth inclined portion 314a of the first engagement portion 31. In this embodiment, the extension direction of the fourth inclined portion 197a and the extension direction of the fourth inclined portion 314a are approximately parallel in the connected state.

In this embodiment, the second light source side engaging portion 290 has a shape similar to that of the first light source side engaging portion 190, that is, the first light source side engaging portion 190 has a convex shape. The second opposing member 291 of the second light source side engaging portion 290 includes a first inclined portion 294b, a second inclined portion 295b, a third inclined portion 296b, and a fourth inclined portion 297b. In the connected state, the first inclined portion 294b faces the first inclined portion 321 of the second engaging portion 32. Also, in the connected state, the second inclined portion 295b faces the second inclined portion 322 of the second engaging portion 32. Furthermore, in the connected state, the third inclined portion 296b faces the third inclined portion 323 of the second engaging portion 32. Furthermore, in the connected state, the fourth inclined portion 297b faces the fourth inclined portion 324 of the second engaging portion 32.

In this embodiment, the thermal expansion coefficient of the connecting member 10 is smaller than the thermal expansion coefficient of the first light source cover 121. Therefore, the first light source cover 121 is positioned via the first light source side engagement portion 190 by the connecting member 10. As a result, contact between the first light source cover 121 and the second light source cover 221 can be effectively prevented.

In addition, in this embodiment, the thermal expansion coefficient of the connecting member 10 is smaller than the thermal expansion coefficient of the second light source cover 221. Therefore, the second light source cover 221 is positioned via the second light source side engagement portion 290 by the connecting member 10. As a result, contact between the first light source cover 121 and the second light source cover 221 can be more effectively prevented.

In this embodiment, the protrusion 34 is located between the first light source cover 121 and the second light source cover 221 in the connected state. Specifically, the protrusion 34 is located between the engagement portion 121f of the first light source cover 121 and the engagement portion 221f of the second light source cover 221. Therefore, even if the first light source cover 121 and the second light source cover 221 thermally expand, the distance between the engagement portion 121f and the engagement portion 221f can be maintained, and contact between the main body portion 121m continuing from the engagement portion 121f and the main body portion 221m of the second light source cover 221 continuing from the engagement portion 221f can be suppressed. As a result, it is possible to suppress the first light source unit 120 and the second light source unit 220 from coming into contact with each other and applying a pressing force to each other.

Here, at room temperature during manufacture, the length L1 of the gap G between the first light source unit 120 and the second light source unit 220 in the connected state along the first direction D1 is, for example, 1 mm. In other words, at room temperature during manufacture, the length L1 of the gap G between the first cover closing member 180a and the second cover closing member 280b in the connected state along the first direction D1 is, for example, 1 mm.

The length of the protrusion 34 along the second direction D2 is, for example, equal to or less than the length of the engagement portion 121f along the second direction D2. In this embodiment, the length of the protrusion 34 along the second direction D2 is approximately the same as the length of the engagement portion 121f along the second direction D2.

In this embodiment, the tip 35 of the protrusion 34 faces the first cover closing member 180a and the second cover closing member 280b in the second direction D2 in the connected state. Therefore, even if at least one of the first light source cover 121 and the second light source cover 221 thermally expands, a space can be secured for the first cover closing member 180a to move in the first direction D1 and for the second cover closing member 280b to move in the fourth direction D4. Note that the tip 35 of the protrusion 34 may or may not contact the first cover closing member 180a and the second cover closing member 280b in the connected state.

Next, the lighting system 1 in the connected state will be described with reference to Figs. 5 and 6. Fig. 5 is a perspective view showing the lighting system 1 in a state before the first light source unit 120 and the second light source unit 220 are connected to the connecting member 10. In detail, Fig. 5 shows the lighting system 1 as viewed diagonally from above. Note that the position of the second light source unit 220 relative to the position of the first light source unit 120 shown in Fig. 5 is substantially the same as the position of the second light source unit 220 relative to the position of the first light source unit 120 in the connected state. Also, in Fig. 5, the internal power lines PL1, PL2, and PL3 are omitted for the sake of simplicity.

As shown in FIG. 5, in this embodiment, the first light source side engagement portion 190a has two first opposing members 191a. The two first opposing members 191a face each other in the third direction D3 (see FIG. 1). Also, in this embodiment, the second light source side engagement portion 290b has two second opposing members 291. The two second opposing members 291 face each other in the third direction D3 (see FIG. 1).

In the connected state, the first light source side engagement portion 190a and the second light source side engagement portion 290b face each other in the first direction D1. In addition, the two first opposing members 191a face each of the two second opposing members 291 in the first direction D1.

Figure 6 is a perspective view showing the lighting system 1 in a state in which the first light source unit 120 and the second light source unit 220 are connected to the connecting member 10. In detail, Figure 6 shows the lighting system 1 as viewed diagonally from above. Note that Figure 6 shows the internal power line PL1, the internal power line PL2, and the internal power line PL3.

As shown in FIG. 6, in the connected state, the first engagement portion 31a of the connecting member 10 engages with the front first opposing member 191a. The second engagement portion 32a engages with the front second opposing member 291. Although not shown, in the connected state, the first engagement portion 31b engages with the rear first opposing member 191a, and the second engagement portion 32b engages with the rear second opposing member 291.

In the connected state, the base portion 20 covers the internal power line PL2 extending from the first light source unit 120 to the second light source unit 220. Specifically, it covers the internal power line PL2 extending from the first terminal block 160a included in the first light source unit 120 to the second terminal block 260b included in the second light source unit 220. Therefore, it is possible to prevent the internal power line PL2 from moving in the direction opposite to the second direction D2 (see FIG. 1).

In addition, in the connected state, the internal power line PL2 is located between the two wall portions 30. Therefore, the internal power line PL2 can be prevented from moving in the third direction D3 (see FIG. 1).

The above describes an embodiment of the present invention with reference to the drawings. However, the present invention is not limited to the above embodiment, and can be implemented in various aspects without departing from the gist of the present invention. In addition, the multiple components disclosed in the above embodiment can be modified as appropriate.

In addition, the drawings mainly show each component in a schematic manner in order to facilitate understanding of the invention, and the thickness, length, number, spacing, etc. of each component shown in the drawings may differ from the actual ones due to the convenience of creating the drawings. Furthermore, the configuration of each component shown in the above embodiment is one example and is not particularly limited, and it goes without saying that various modifications are possible within a range that does not substantially deviate from the effects of the present invention.

In this embodiment, the lighting system 1 includes one connecting member 10, one first light source unit 120, and one second light source unit 220. However, the lighting system 1 may include three or more light source units. In this case, the lighting system 1 includes one connecting member 10 less than the number of light source units. That is, in this case, the lighting system 1 includes one connecting member 10 less than the number of lighting fixtures.

In addition, in this embodiment, the first engaging portion 31 and the second engaging portion 32 of the connecting member 10 have a concave shape, and the first light source side engaging portion 190 and the second light source side engaging portion 290 have a convex shape. However, as long as the first engaging portion 31 engages with the first light source side engaging portion 190 and the second engaging portion 32 engages with the second light source side engaging portion 290, the first engaging portion 31 and the second engaging portion 32 may have a convex shape, and the first light source side engaging portion 190 and the second light source side engaging portion 290 may have a concave shape. Also, one of the first engaging portion 31 and the second engaging portion 32 may have a convex shape, and the other may have a concave shape. In this case, the first light source side engaging portion 190 or the second light source side engaging portion 290 corresponding to the one having the convex shape has a concave shape, and the first light source side engaging portion 190 or the second light source side engaging portion 290 corresponding to the other having the concave shape has a convex shape.

Furthermore, in this embodiment, the first lighting device 100 and the second lighting device 200 have a substantially rectangular parallelepiped shape. However, as long as the first light source unit 120 and the second light source unit 220 are connected by the connecting member 10, at least one of the first lighting device 100 and the second lighting device 200 may have a shape other than a rectangular parallelepiped shape. For example, at least one of the first lighting device 100 and the second lighting device 200 may have a substantially cubic shape, a substantially cylindrical shape, or a substantially polygonal tube shape.

This application further discloses the following supplementary notes. Note that the following supplementary notes do not limit the present invention.

[Appendix 1]
A coupling member that couples a first light source unit including a first light source side engagement portion and a second light source unit including a second light source side engagement portion,
a base portion extending along a first direction from the first light source unit toward the second light source unit and spanning the first light source unit and the second light source unit in a connected state in which the connecting member connects the first light source unit and the second light source unit;
at least one wall portion extending from the base portion in a second direction intersecting the first direction,
The wall portion includes a first engagement portion and a second engagement portion aligned in the first direction,
In the connected state, the first engagement portion engages with the first light source side engagement portion,
In the connected state, the second engagement portion engages with the second light source side engagement portion.

[Appendix 2]
The wall portion includes two walls.
The connecting member of claim 1, wherein the two wall portions face each other in a third direction that intersects the first direction and the second direction.

[Appendix 3]
The wall portion is
an intermediate portion located intermediate the first engagement portion and the second engagement portion;
a protruding portion protruding from the middle portion in the second direction,
The connecting member described in Appendix 1 or Appendix 2, wherein in the connected state, the protrusion is positioned between a first light source cover included in the first light source unit and a second light source cover included in the second light source unit that are aligned along the first direction.

[Appendix 4]
The first engagement portion is
a first inclined portion inclined with respect to the first direction;
a second inclined portion inclined with respect to a direction in which the first inclined portion extends,
a first end portion which is one of both ends of the first inclined portion and a second end portion which is one of both ends of the second inclined portion are connected to each other;
A connecting member described in any one of Appendix 1 to Appendix 3, wherein a third end which is the other of the two ends of the first inclined portion and a fourth end which is the other of the two ends of the second inclined portion are spaced apart.

[Appendix 5]
The first engagement portion is
a third inclined portion extending from the third end in a direction away from the base portion;
a fourth inclined portion extending from the fourth end in a direction away from the base portion,
A connecting member as described in Appendix 4, wherein each of the third inclined portion and the fourth inclined portion is inclined with respect to the second direction so that a tip of the third inclined portion and a tip of the fourth inclined portion approach each other.

[Appendix 6]
The connecting member according to any one of claims 1 to 5, wherein in the connected state, the base portion covers an electric wire extending from the first light source unit to the second light source unit.

[Appendix 7]
The connecting member according to any one of claims 1 to 6, wherein the connecting member has a thermal expansion coefficient smaller than a thermal expansion coefficient of a first light source cover of the first light source unit.

[Appendix 8]
A connecting member according to any one of claims 1 to 7,
The first light source unit;
the second light source unit.

The present invention provides a connecting member and a lighting system, and has industrial applicability.

1 Lighting system 10 Connection member 20 Base portion 30 Wall portion 31 First engagement portion 311 First inclined portion 311c First end portion 311d Third end portion 312c Second end portion 312d Fourth end portion 312 Second inclined portion 313 Third inclined portion 313e Tip 314 Fourth inclined portion 314e Tip 32 Second engagement portion 33 Intermediate portion 34 Protrusion portion 100 First lighting device 120 First light source unit 121 First light source cover 190 First light source side engagement portion 200 Second lighting device 220 Second light source unit 221 Second light source cover 290 Second light source side engagement portion D1 First direction D2 Second direction D3 Third direction PL2 Internal power line (wiring)

Claims (2)

A connecting member that connects a first light source unit that includes a first light source side engaging portion and is housed in a first housing and a second light source unit that includes a second light source side engaging portion and is housed in a second housing,
a base portion extending along a first direction from the first light source unit toward the second light source unit and spanning the first light source unit and the second light source unit in a connected state in which the connecting member connects the first light source unit and the second light source unit;
at least one wall portion extending from the base portion in a second direction intersecting the first direction,
The wall portion includes a first engagement portion and a second engagement portion aligned in the first direction,
In the connected state, the first engagement portion engages with the first light source side engagement portion to position the first light source unit in a longitudinal direction along the first direction,
In the connected state, the second engagement portion engages with the second light source side engagement portion to position the second light source unit in the longitudinal direction,
In the connected state, the first light source unit and the second light source unit are restricted from being displaced relative to each other in the longitudinal direction by the first engaging portion and the second engaging portion ,
Each of the first engagement portion and the second engagement portion includes a first engagement surface and a second engagement surface extending to a tip end of the wall portion,
A connecting member , wherein each of the first engagement surface and the second engagement surface is inclined with respect to the second direction so that a tip of the first engagement surface and a tip of the second engagement surface approach each other . A connecting member according to claim 1 ;
The first light source unit;
The second light source unit ;
The first housing;
The second housing;
Equipped with
The first light source side engagement portion is
a first light source side engagement surface that faces the first engagement surface of the first engagement portion in the connected state and extends parallel to the first engagement surface;
a second light source side engagement surface that faces the second engagement surface of the first engagement portion in the connected state and extends parallel to the second engagement surface,
The second light source side engagement portion is
a first light source side engagement surface that faces the first engagement surface of the second engagement portion in the connected state and extends parallel to the first engagement surface;
a second light source side engagement surface that faces the second engagement surface of the second engagement portion in the connected state and extends parallel to the second engagement surface.

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