JP7520641B2 - lighting equipment - Google Patents

Description

The present invention relates to a lighting fixture.

Lighting fixtures that are fixed to structures such as ceilings and walls are known. For example, the lighting device of Patent Document 1 includes a fixture body and a light source unit. The fixture body is fixed to a fixture such as a bolt that is supported on the structure. The light source unit is removably attached to the fixture body. When fixing the lighting device of Patent Document 1 to a structure, first the fixture body is fixed to the structure. Then, the light source unit is attached to the fixture body. When removing the light source unit, the light source unit is removed from the fixture body that is fixed to the structure.

More specifically, in the lighting device of Patent Document 1, a spring member is disposed on the inside of the bottom surface of the fixture body, and a perforated member is disposed on the inside of the top surface of the light source unit. When attaching the light source unit to the fixture body, first, the light source unit is temporarily held on the fixture body. More specifically, the arc portion of the spring member is inserted into the hole of the perforated member, and the tip of the spring member is hooked into the hole of the perforated member. As a result, the light source unit is in a temporarily held state. After that, the light source unit is moved so that the arc portion of the spring member slides against the hole of the perforated member, and the light source unit is transitioned from the temporarily held state to the attached state.

When removing the light source unit from the fixture body, the light source unit is pulled so that it is temporarily held in the fixture body. In detail, the arc portion of the spring member is slid against the hole of the perforated member in the opposite direction to that when the light source unit is attached to the fixture body, and the tip of the spring member is hooked into the hole of the perforated member. After that, the tip of the spring member is removed from the hole of the perforated member, and the light source unit is removed from the fixture body.

JP 2016-213172 A

However, the lighting device (lighting fixture) in Patent Document 1 consists of a fixture body and a light source unit. Therefore, the work of removing the light source unit from the fixture body and the work of attaching the light source unit to the fixture body must be performed on the fixture body that is fixed to a structure. Therefore, if the fixture body is fixed to the ceiling, the work of attaching and detaching the light source unit must be done at a high place, which cannot be easily done.

The present invention was made in consideration of the above problems, and its purpose is to provide a lighting fixture that allows easy attachment and detachment of the light source unit.

The lighting device disclosed in the present application is fixed to a structure. The lighting device includes a main body unit, a frame unit, and a light source unit. The main body unit is fixed to the structure. The frame unit is detachably attached to the main body unit. The light source unit is detachably attached to the frame unit. The frame unit is detachable from the main body unit when the light source unit is attached to the frame unit. The light source unit is detachable from the frame unit when the frame unit is not attached to the main body unit. The light source unit also includes a first spring member. The frame unit includes an engagement member and a support portion. The engagement member engages with the first spring member. The support portion slidably supports the engagement member. The engagement member slides between a first position away from the first spring member and a second position engaged with the first spring member.

In the lighting fixture disclosed in the present application, the frame unit may further include a frame portion. The engagement member may have a first engagement portion that engages with the first spring member. The first engagement portion is disposed inside the frame portion. The first spring member that engages with the first engagement portion is stored inside the frame portion.

In the lighting device disclosed in the present application, the engaging member may have a protrusion that restricts the sliding movement of the engaging member. When the engaging member engages with the first spring member, the first spring member engages with the protrusion, restricting the sliding movement of the engaging member.

In the lighting device disclosed in the present application, the protrusion may have an inclined portion. When the engagement member slides from the first position to the second position, the first spring member slides on the inclined portion and overcomes the protrusion.

In the lighting fixture disclosed in the present application, the engagement member may have a cover portion that covers the first spring member. The frame unit may further include a fastening member that penetrates the cover portion. The fastening member penetrates the cover portion and engages with the first spring member.

The lighting fixture disclosed in this invention makes it easy to attach and detach the light source unit.

1 is a perspective view showing a lighting fixture according to an embodiment of the present invention. 1 is a front view showing a lighting fixture according to an embodiment of the present invention. 1 is an exploded perspective view showing a lighting fixture according to an embodiment of the present invention. FIG. 2 is a perspective view showing a light source unit. FIG. 4 is a perspective view showing a fixing spring and a fixing member. FIG. 4 is a perspective view showing a frame unit. FIG. FIG. 4 is an enlarged plan view showing a portion of the frame unit. FIG. 2 is a plan view showing a light source unit and a frame unit. FIG. 2 is a plan view showing a light source unit and a frame unit. 13 is a perspective view showing a first fixing spring engaged with an engaging member; FIG. 13 is a perspective view showing a second fixing spring engaged with the engaging member; FIG. FIG. 2 is an enlarged perspective view showing a portion of the light source unit and the frame unit. FIG. FIG. 4 is another perspective view showing the main unit. FIG. 13 shows the mounting spring engaging the spring receiver. 13 is a rear view showing the operation of attaching the coupling unit to the main unit. FIG. 13 is a rear view showing the operation of attaching the coupling unit to the main unit. FIG. 13 is a rear view showing the operation of attaching the coupling unit to the main unit. FIG. 13 is a rear view showing the operation of attaching the coupling unit to the main unit. FIG. 1 is a plan view showing a lighting fixture according to an embodiment of the present invention. 22 is a cross-sectional view of the lighting fixture taken along line AA in FIG. 21. 2 is an enlarged cross-sectional view showing a portion of the lighting device according to the embodiment of the present invention. FIG.

Below, an embodiment of the lighting fixture of the present invention will be described with reference to the drawings (Figs. 1 to 23). However, the present invention is not limited to the following embodiment, and can be implemented in various forms without departing from the gist of the invention. Note that where explanations overlap, they may be omitted as appropriate. Also, in the drawings, the same or equivalent parts will be given the same reference symbols, and explanations will not be repeated.

First, the lighting fixture 100 of this embodiment will be described with reference to Figures 1 to 3. The lighting fixture 100 is fixed to a structure such as a ceiling or a wall. The lighting fixture 100 is, for example, a base light. The lighting fixture 100 of this embodiment is a recessed type base light. Recessed type base lights are recessed into structures such as ceilings or walls. In this embodiment, the lighting fixture 100 will be described using as an example a case where it is used by recessing it into a ceiling C (Figure 2).

For ease of explanation, the lighting fixture 100 of this embodiment will be described below by defining the lower side of the lighting fixture 100 when embedded in the ceiling C (FIG. 2) as the "lower side" and the opposite side of the lower side as the "upper side". Furthermore, the lighting fixture 100 of this embodiment will be described below by defining the side where the power supply unit 303 (FIG. 4) is arranged with respect to the fixed spring 2 (FIG. 4) as the "rear side" and the opposite side of the rear side as the "front side". Furthermore, the lighting fixture 100 of this embodiment will be described below by defining the right side as viewed from the rear side of the lighting fixture 100 as the "right side" and the left side as viewed from the rear side of the lighting fixture 100 as the "left side". Therefore, in this embodiment, directions such as "upper", "lower", "side", "forward", "rear", "diagonally upward", and "diagonally downward" refer to the directions when the lighting fixture 100 is attached to the ceiling.

Fig. 1 is a perspective view showing the lighting fixture 100 of this embodiment. More specifically, Fig. 1 shows the lighting fixture 100 as viewed from diagonally below. Fig. 2 is a front view showing the lighting fixture 100 of this embodiment. More specifically, Fig. 2 shows the lighting fixture 100 embedded in a ceiling C. Fig. 3 is an exploded perspective view showing the lighting fixture 100 of this embodiment.

As shown in FIG. 1, the lighting device 100 of this embodiment has a rectangular parallelepiped shape. The lighting device 100 includes a light source unit 300, a frame unit 500, and a main body unit 700.

The light source unit 300 emits light. The frame unit 500 supports the light source unit 300. The main body unit 700 supports the frame unit 500. Specifically, the frame unit 500 surrounds the light source unit 300. The main body unit 700 surrounds the frame unit 500.

The light source unit 300 has a cover member 301. The cover member 301 transmits light. The cover member 301 is transparent or translucent. The cover member 301 is formed, for example, by molding resin into a box shape. The resin is, for example, polycarbonate. The cover member 301 may have a color such as milky white. The cover member 301 is, for example, a shade or a diffusion cover.

The underside of the cover member 301 is not covered by the frame unit 500. In other words, the cover member 301 is exposed from the lower opening of the frame unit 500. Light is emitted from the lower opening of the frame unit 500.

As shown in FIG. 2, the lighting fixture 100 is embedded in the ceiling C. Specifically, the lighting fixture 100 is embedded in an embedding hole provided in a ceiling panel. The lighting fixture 100 is fixed to a hanging bolt (not shown) provided in a slab or beam above the ceiling and suspended. More specifically, the main unit 700 is fixed to the hanging bolt. In other words, the main unit 700 is fixed to the structure.

As shown in FIG. 3, the frame unit 500 forms a storage space S1. The storage space S1 is a space surrounded by the frame unit 500. The light source unit 300 is stored in the storage space S1 of the frame unit 500. The light source unit 300 is detachably attached to the frame unit 500.

The main body unit 700 forms a storage space S2. The storage space S2 is a space surrounded by the main body unit 700. The frame body unit 500 is stored in the storage space S2 of the main body unit 700. The frame body unit 500 is attached to the main body unit 700 in a manner that allows it to be freely attached and detached. Specifically, the frame body unit 500 to which the light source unit 300 is attached is attached to the main body unit 700. Therefore, the frame body unit 500 to which the light source unit 300 is attached is stored in the storage space S2 of the main body unit 700.

The frame unit 500 can be attached to and detached from the main unit 700 when the light source unit 300 is attached to the frame unit 500. The light source unit 300 can be attached to and detached from the frame unit 500 when the frame unit 500 is not attached to the main unit 700.

Next, the light source unit 300 will be further described with reference to FIG. 4. FIG. 4 is a perspective view showing the light source unit 300. In detail, FIG. 4 shows the light source unit 300 as viewed obliquely from above.

As shown in FIG. 4, the light source unit 300 has a first fixing spring 2a, a second fixing spring 2b, a first fixing member 3a, a second fixing member 3b, a base portion 302, and a power supply unit 303. The light source unit 300 has a rectangular shape in a plan view.

The power supply unit 303 supplies power to the light source 306 (Figure 22). When the power supply unit 303 supplies power to the light source 306 (Figure 22), light is emitted from the light source unit 300. Specifically, the power supply unit 303 includes a power supply circuit. The power supply circuit supplies power to the light source 306 (Figure 22). In this embodiment, the power supply circuit supplies a DC voltage to the light source 306 (Figure 22).

The base portion 302 is, for example, plate-shaped. The base portion 302 supports the cover member 301. Specifically, the lower portion of the base portion 302 is covered by the cover member 301.

The base portion 302 has a mounting surface 302a. The mounting surface 302a constitutes the upper surface of the base portion 302. The first fixing member 3a, the second fixing member 3b, and the power supply unit 303 are fixed to the mounting surface 302a. In this embodiment, the first fixing member 3a and the second fixing member 3b are arranged on the front side of the power supply unit 303. More specifically, the first fixing member 3a and the second fixing member 3b are arranged near the center of the mounting surface 302a in the front-rear direction. More specifically, the first fixing member 3a and the second fixing member 3b are arranged closer to the power supply unit 303 than the center of the mounting surface 302a in the front-rear direction.

The first fixed spring 2a is attached to the first fixed member 3a. Therefore, the first fixed spring 2a is attached to the mounting surface 302a by the first fixed member 3a.

The first fixing member 3a is disposed at the right end of the mounting surface 302a. The first fixing spring 2a extends leftward from the right end of the mounting surface 302a (the first fixing member 3a). In other words, the first fixing spring 2a extends from the right end of the mounting surface 302a (the first fixing member 3a) toward the inside (center) of the mounting surface 302a.

The second fixed spring 2b is attached to the second fixed member 3b. Therefore, the second fixed spring 2b is attached to the mounting surface 302a by the second fixed member 3b.

The second fixing member 3b is disposed at the left end of the mounting surface 302a. The second fixing spring 2b extends rightward from the left end of the mounting surface 302a (the second fixing member 3b). In other words, the second fixing spring 2b extends from the left end of the mounting surface 302a (the second fixing member 3b) toward the inside (center) of the mounting surface 302a.

In the following description, when it is not necessary to distinguish between the first fixed spring 2a and the second fixed spring 2b, the first fixed spring 2a and the second fixed spring 2b may be referred to as "fixed spring 2". Similarly, when it is not necessary to distinguish between the first fixed member 3a and the second fixed member 3b, the first fixed member 3a and the second fixed member 3b may be referred to as "fixed member 3".

Next, the fixed spring 2 will be further described with reference to FIG. 5. FIG. 5 is a perspective view showing the fixed spring 2 and the fixed member 3. As shown in FIG. 5, the fixed spring 2 has a first winding portion 21, a second winding portion 22, a first arc portion 23, a second arc portion 24, and a tip portion 25.

The first winding portion 21 and the second winding portion 22 are fixed to the fixed member 3. The first arc portion 23 extends in an arc shape from the first winding portion 21. The second arc portion 24 extends in an arc shape from the second winding portion 22. The tip portion 25 connects the tip of the first arc portion 23 and the tip of the second arc portion 24.

The fixed spring 2 is formed by processing a linear spring member. The first winding portion 21 is formed by winding one end of the linear spring member into a coil shape. The second winding portion 22 is formed by winding the other end of the linear spring member into a coil shape.

When the first arc portion 23 is pulled upward, the first winding portion 21 generates a restoring force (elastic force) that returns the first arc portion 23 downward. Similarly, when the second arc portion 24 is pulled upward, the second winding portion 22 generates a restoring force (elastic force) that returns the second arc portion 24 downward. In other words, the fixed spring 2 is a torsion coil spring.

Next, the frame unit 500 will be further described with reference to FIG. 6. FIG. 6 is a perspective view showing the frame unit 500. In detail, FIG. 6 shows the frame unit 500 as seen from diagonally above.

As shown in FIG. 6, the frame unit 500 includes a first mounting spring 4a, a second mounting spring 4b, an engagement member 5, a fastening member 501, and a frame portion 510. The frame unit 500 is rectangular in plan view.

The frame portion 510 forms the storage space S1 described with reference to FIG. 3. The frame portion 510 is rectangular in plan view and has a first wall portion 511 to a fourth wall portion 514. In this embodiment, the first wall portion 511 constitutes the front wall of the frame body unit 500. The second wall portion 512 faces the first wall portion 511 in the front-rear direction. In other words, the second wall portion 512 constitutes the rear wall of the frame body unit 500. The third wall portion 513 constitutes the right wall of the frame body unit 500. The fourth wall portion 514 faces the third wall portion 513 in the left-right direction. In other words, the fourth wall portion 514 constitutes the left wall of the frame body unit 500.

The first mounting spring 4a is fixed to the outer surface of the first wall portion 511. The second mounting spring 4b is fixed to the outer surface of the second wall portion 512. The first mounting spring 4a and the second mounting spring 4b will be described later with reference to Figures 14 to 20.

The engagement member 5 engages with the fixed spring 2 (first fixed spring 2a and second fixed spring 2b) described with reference to Figures 4 and 5. The fixed spring 2 (first fixed spring 2a and second fixed spring 2b) is an example of a first spring member.

The engaging member 5 is supported by the third wall portion 513 and the fourth wall portion 514. In other words, the engaging member 5 extends in the left-right direction from the third wall portion 513 to the fourth wall portion 514 and spans between the third wall portion 513 and the fourth wall portion 514. The engaging member 5 is made of, for example, metal.

The third wall portion 513 and the fourth wall portion 514 support the engaging member 5 so that it can slide freely. In this embodiment, the third wall portion 513 and the fourth wall portion 514 are an example of a support portion. Specifically, the engaging member 5 can slide freely in a first sliding direction D1 and a second sliding direction D2. In this embodiment, the first sliding direction D1 is a direction from the front to the rear. The second sliding direction D2 is a direction from the rear to the front. In other words, the engaging member 5 can slide freely in the front-rear direction.

Next, the engaging member 5 will be further described with reference to Figure 6. As shown in Figure 6, the engaging member 5 has a first cover part 51, a right engaging part 52, a connecting part 53, a left engaging part 54, and a second cover part 55.

The first cover part 51 is disposed at the right end part of the frame unit 500 and is supported on the upper surface of the third wall part 513. More specifically, the right end part of the first cover part 51 is supported by the third wall part 513. The first cover part 51 is, for example, plate-shaped.

The right engagement portion 52 is disposed inside the frame portion 510. More specifically, the right engagement portion 52 is connected to the first cover portion 51 and extends downward from the first cover portion 51. More specifically, the right engagement portion 52 is connected to the left end portion of the first cover portion 51. The right engagement portion 52 is, for example, plate-shaped. The right engagement portion 52 engages with the first fixed spring 2a described with reference to Figures 4 and 5. In this embodiment, the right engagement portion 52 is an example of a first engagement portion.

The second cover part 55 is disposed at the left end of the frame unit 500 and is supported on the upper surface of the fourth wall part 514. More specifically, the left end of the second cover part 55 is supported by the fourth wall part 514. The second cover part 55 is, for example, plate-shaped.

The left engagement portion 54 is disposed inside the frame portion 510. More specifically, the left engagement portion 54 is connected to the second cover portion 55 and extends downward from the second cover portion 55. More specifically, the left engagement portion 54 is connected to the right end portion of the second cover portion 55. The left engagement portion 54 is, for example, plate-shaped. The left engagement portion 54 engages with the second fixed spring 2b described with reference to Figures 4 and 5. In this embodiment, the left engagement portion 54 is an example of a first engagement portion. The fastening member 501 penetrates the second cover portion 55 and engages with the second fixed spring 2b. The fastening member 501 will be described later with reference to Figure 12.

The connecting portion 53 extends in the left-right direction and connects to the right engaging portion 52 and the left engaging portion 54. More specifically, the connecting portion 53 connects to the lower end of the right engaging portion 52 and the lower end of the left engaging portion 54. The connecting portion 53 is, for example, plate-shaped.

Next, the engaging member 5 will be further described with reference to FIG. 7. FIG. 7 is a perspective view showing the engaging member 5. As shown in FIG. 7, the right engaging portion 52 has a first notch portion 52a. Similarly, the left engaging portion 54 has a second notch portion 54a.

The first notch 52a extends forward from the rear end of the right engagement part 52. In other words, the first notch 52a opens at the rear end of the right engagement part 52. The first fixed spring 2a described with reference to Figures 4 and 5 engages with the first notch 52a.

The second notch 54a extends forward from the rear end of the left engagement part 54. In other words, the second notch 54a opens at the rear end of the left engagement part 54. The second fixed spring 2b described with reference to Figures 4 and 5 engages with the second notch 54a.

As shown in FIG. 7, the engagement member 5 further includes a handle portion 56 and a plurality of slide direction restricting portions 57. In this embodiment, the engagement member 5 includes four slide direction restricting portions 57.

The handle portion 56 is provided on the connecting portion 53 and protrudes upward from the connecting portion 53. In this embodiment, the handle portion 56 is connected to the rear end of the connecting portion 53 and extends along the connecting portion 53. In other words, the handle portion 56 extends in the left-right direction. Since the engaging member 5 has the handle portion 56, the worker can grasp the handle portion 56 and slide the engaging member 5. Therefore, the worker can easily slide the engaging member 5. Furthermore, by providing the handle portion 56 on the connecting portion 53, the bending rigidity of the connecting portion 53 can be increased.

Some of the multiple sliding direction regulating parts 57 are provided on the first cover part 51, and the remaining multiple sliding direction regulating parts 57 are provided on the second cover part 55. In this embodiment, two sliding direction regulating parts 57 are provided on each of the first cover part 51 and the second cover part 55.

The slide direction restricting portion 57 of the first cover portion 51 extends downward from the first cover portion 51 and faces the outer surface of the third wall portion 513 described with reference to FIG. 6. In this embodiment, the slide direction restricting portion 57 of the first cover portion 51 is connected to the right end portion of the first cover portion 51.

The slide direction restricting portion 57 of the second cover portion 55 extends downward from the second cover portion 55 and faces the outer surface of the fourth wall portion 514 described with reference to FIG. 6. In this embodiment, the slide direction restricting portion 57 of the second cover portion 55 is connected to the left end portion of the second cover portion 55.

The engaging member 5 has a sliding direction restricting portion 57, so that the direction in which the engaging member 5 slides can be restricted to the first sliding direction D1 and the second sliding direction D2 (front-rear direction). Specifically, the sliding direction restricting portion 57 can restrict the engaging member 5 from rotating counterclockwise and clockwise.

For example, when an operator grips the handle portion 56 and slides the engaging member 5, the operator grips a portion of the handle portion 56 to the left or right of the center in the left-right direction and slides the engaging member 5, which acts as a force to rotate the engaging member 5 clockwise or counterclockwise. When a force to rotate the engaging member 5 clockwise acts, one of the four slide direction restricting portions 57 abuts against the outer surface of the frame portion 510. As a result, clockwise rotation of the engaging member 5 is suppressed. Similarly, when a force to rotate the engaging member 5 counterclockwise acts, one of the four slide direction restricting portions 57 abuts against the outer surface of the frame portion 510. As a result, counterclockwise rotation of the engaging member 5 is suppressed.

Next, referring to FIG. 8, an example of a configuration for supporting the engaging member 5 so that it can slide freely will be described. FIG. 8 is a plan view showing an enlarged portion of the frame unit 500. In detail, FIG. 8 shows an enlarged view of the first cover portion 51 of the engaging member 5 and its vicinity.

As shown in FIG. 8, the frame unit 500 further includes a fastening member 502. The first cover part 51 includes an elongated hole 503 extending in the front-rear direction. The elongated hole 503 penetrates the first cover part 51. The fastening member 502 is inserted into the elongated hole 503 and penetrates the elongated hole 503.

The third wall portion 513 has a groove portion 510a extending in the front-rear direction. The groove portion 510a has an opening on the upper surface of the third wall portion 513. The tip portion of the fastening member 502 that passes through the long hole 503 is fastened to the groove portion 510a. Therefore, the fastening member 502 is fixed to the third wall portion 513. As a result, the first cover portion 51 is supported so as to be able to slide freely along the long hole 503.

The second cover part 55 is supported so as to be slidable in the same manner as the first cover part 51. That is, the second cover part 55 has an elongated hole 503, and the fourth wall part 514 has a groove part 510a on its upper surface. The frame unit 500 further has a fastening member 502 that is fastened to the groove part 510a of the fourth wall part 514 via the elongated hole 503 of the second cover part 55. The first cover part 51 and the second cover part 55 are supported so as to be slidable along the elongated hole 503, and thus the engaging member 5 is supported so as to be slidable along the front-rear direction.

The fastening member 502 is, for example, a screw, a screw, or a bolt. The width dimension in the left-right direction of the long hole 503 is larger than the diameter of the shaft portion of the fastening member 502 and smaller than the diameter of the head portion of the fastening member 502. The fastening member 502 may be, for example, a tapping screw. By using a tapping screw as the fastening member 502, it is not necessary to form a thread groove in the groove portion 510a, making it easier to manufacture the frame unit 500. However, a thread groove may be formed in the groove portion 510a and the fastening member 502 may be screwed into the thread groove.

Next, the work of attaching the light source unit 300 to the frame unit 500 will be described with reference to Figures 1 to 10. Figures 9 and 10 are plan views showing the light source unit 300 and the frame unit 500. In detail, Figure 9 shows the light source unit 300 and the frame unit 500 in a state where the engagement member 5 is not engaged with the fixed spring 2. Figure 10 shows the light source unit 300 and the frame unit 500 in a state where the engagement member 5 is engaged with the fixed spring 2.

As shown in FIG. 9, when attaching the light source unit 300 to the frame unit 500, the worker first accommodates the light source unit 300 in the accommodation space S1 (FIG. 3) of the frame unit 500. For example, the light source unit 300 can be accommodated in the accommodation space S1 of the frame unit 500 by lowering the frame unit 500 from above the light source unit 300 toward the light source unit 300 placed on a workbench.

Before the engagement member 5 is engaged with the fixed spring 2, the engagement member 5 is located at the first position P1. The first position P1 indicates a position where the engagement member 5 is separated from the fixed spring 2. In this embodiment, the first position P1 is a position in front of the fixed spring 2.

Next, the operator slides the engaging member 5 in the first sliding direction D1. That is, the engaging member 5 is slid rearward. Specifically, as shown in FIG. 10, the engaging member 5 is slid to the second position P2. As a result, the engaging member 5 engages with the fixed spring 2. More specifically, the first fixed spring 2a engages with the first notch portion 52a (FIG. 7), and the second fixed spring 2b engages with the second notch portion 54a (FIG. 7). The second position P2 indicates the position where the engaging member 5 engages with the fixed spring 2.

The length of the elongated hole 503 in the front-rear direction may be any length that allows the engaging member 5 to slide between the first position P1 and the second position P2. In other words, the length of the elongated hole 503 in the front-rear direction may be any length that allows the engaging member 5 to slide between the position where the engaging member 5 engages with the fixed spring 2 and the position where the engaging member 5 disengages from the fixed spring 2. In this embodiment, as shown in FIG. 9, when the engaging member 5 is located at the first position P1, the fastening member 502 is located near the rear edge of the elongated hole 503. At this time, the fastening member 502 may abut against the rear edge of the elongated hole 503. On the other hand, when the engaging member 5 is located at the second position P2, as shown in FIG. 10, the fastening member 502 is located near the front edge of the elongated hole 503. At this time, the fastening member 502 may abut against the front edge of the elongated hole 503.

When the engaging member 5 is engaged with the fixed spring 2, a portion of the first fixed spring 2a is covered by the first cover portion 51, and a portion of the second fixed spring 2b is covered by the second cover portion 55. Specifically, the first winding portion 21, the second winding portion 22, a portion of the first arc portion 23, and a portion of the second arc portion 24 of the first fixed spring 2a are covered by the first cover portion 51. Similarly, the first winding portion 21, the second winding portion 22, a portion of the first arc portion 23, and a portion of the second arc portion 24 of the second fixed spring 2b are covered by the second cover portion 55.

When the engaging member 5 is engaged with the fixed spring 2, the fixed spring 2 is stored inside the frame portion 510. Therefore, even if the lighting fixture 100 is fixed to a structure such as a ceiling or wall, the fixed spring 2 does not interfere with the ceiling board, beams in the ceiling, walls, etc.

Next, the worker engages the fastening member 501 with the second fixed spring 2b. The engagement between the fastening member 501 and the second fixed spring 2b will be described with reference to FIG. 12.

Next, the engagement between the engagement member 5 and the fixed spring 2 will be described with reference to Figures 1 to 11. Figure 11 is a perspective view showing the first fixed spring 2a engaged with the engagement member 5. As shown in Figure 11, the first cutout portion 52a has an opening 61, a lower end portion 62, a protrusion portion 63, and a rear wall 64.

The opening 61 of the first cutout portion 52a is formed at the rear end of the right engagement portion 52. The protrusion portion 63 is formed at the lower end portion 62. More specifically, the protrusion portion 63 is provided between the opening 61 and the rear wall 64. The protrusion portion 63 regulates the sliding movement of the first cover portion 51.

In this embodiment, the protrusion 63 has an inclined portion 63a. The inclined portion 63a is formed on the opening 61 side with respect to the apex of the protrusion 63. In other words, the inclined portion 63a is formed behind the apex of the protrusion 63. The inclined portion 63a extends diagonally upward toward the apex of the protrusion 63. In other words, the inclined portion 63a extends diagonally upward toward the front. Therefore, the inclined portion 63a is higher toward the front. The dimension of the gap between the apex of the protrusion 63 and the upper end of the first notch portion 52a is larger than the thickness (diameter) of the first arc portion 23 of the first fixed spring 2a.

The rear wall 64 faces the opening 61. The rear wall 64 is the part of the first notch 52a that is farthest from the opening 61. In other words, the rear wall 64 forms the bottom of the first notch 52a. The dimension of the gap between the rear wall 64 and the protrusion 63 in the front-to-rear direction is larger than the thickness (diameter) of the first arc portion 23 of the first fixed spring 2a. In addition, the height of the protrusion 63 (the dimension of the protrusion 63 in the up-down direction) is larger than the thickness (diameter) of the first arc portion 23 of the first fixed spring 2a.

When the engaging member 5 is slid from the first position P1 (FIG. 9) to the second position P2 (FIG. 10), the first arc portion 23 of the first fixed spring 2a first enters the first notch portion 52a through the opening 61 of the first notch portion 52a. The first arc portion 23 that entered the first notch portion 52a slides on the inclined portion 63a and rises to the apex of the protrusion portion 63. At this time, the first arc portion 23 elastically deforms. Then, the first arc portion 23 climbs over the protrusion portion 63. As a result, the first arc portion 23 falls to the lower end portion 62 due to the restoring force of the first winding portion 21 (FIG. 5) and fits between the protrusion portion 63 and the back wall 64. The first arc portion 23 does not have to be elastically deformed when it slides on the inclined portion 63a and rises to the apex of the protrusion portion 63. In this case, after climbing over the protrusion 63, the first arc portion 23 falls to the lower end 62 due to the weight of the light source unit 300.

On the other hand, when the engaging member 5 is slid from the first position P1 (FIG. 9) to the second position P2 (FIG. 10), the second arc portion 24 of the first fixed spring 2a enters the first notch portion 52a through the opening 61 of the first notch portion 52a and is positioned in front of the protrusion portion 63 (inclined portion 63a). In other words, the second arc portion 24 is positioned behind the protrusion portion 63 (inclined portion 63a). As a result, the protrusion portion 63 is sandwiched between the first arc portion 23 and the second arc portion 24.

Therefore, when the engaging member 5 engages with the first fixed spring 2a, the first fixed spring 2a engages with the protrusion 63. As a result, the sliding movement of the first cover part 51 is restricted by the protrusion 63. Specifically, even if a force is applied to the first cover part 51 to move the first cover part 51 in the second sliding direction D2 (FIG. 10), the first arc part 23 gets caught on the protrusion 63, and therefore the sliding movement of the first cover part 51 in the second sliding direction D2 (FIG. 10) is restricted.

Like the first cutout portion 52a, the second cutout portion 54a also has an opening 61, a lower end portion 62, a protrusion portion 63, and a rear wall 64 (see FIG. 12). Therefore, when the engagement member 5 engages with the second fixed spring 2b, the sliding movement of the second cover portion 55 is restricted, just like the first cover portion 51.

As described above with reference to Figures 1 to 11, when the engaging member 5 engages with the fixed spring 2, the sliding movement of the first cover part 51 and the second cover part 55 is restricted. Therefore, the sliding movement of the engaging member 5 is restricted. Therefore, the fixed spring 2 does not easily come off the engaging member 5, and it is possible to prevent the light source unit 300 from being accidentally detached from the frame unit 500.

In addition, according to this embodiment, since the protrusion 63 has an inclined portion 63a, the first arc portion 23 of the fixed spring 2 passes over the protrusion 63 simply by sliding the engagement member 5. This makes it easier to engage the engagement member 5 with the fixed spring 2.

Next, the engagement between the fastening member 501 and the second fixing spring 2b will be described with reference to Figures 9 and 12. As shown in Figure 9, the second cover part 55 has a through hole 58. The through hole 58 passes through the second cover part 55.

Figure 12 is a perspective view showing the second fixed spring 2b engaged with the engagement member 5. As shown in Figure 12, the fastening member 501 is inserted into the through hole 58 (Figure 9) and penetrates the second cover part 55. The fastening member 501 inserted into the through hole 58 (Figure 9) engages with the second fixed spring 2b.

More specifically, when the engaging member 5 engages with the fixed spring 2, the through hole 58 (Fig. 9) overlaps with the space between the first arc portion 23 and the second arc portion 24 of the second fixed spring 2b. Therefore, when the fastening member 501 is inserted into the through hole 58 (Fig. 9), the portion of the fastening member 501 that protrudes downward from the second cover portion 55 is sandwiched between the first arc portion 23 and the second arc portion 24 of the second fixed spring 2b.

Therefore, by inserting the fastening member 501 into the through hole 58 (Figure 9), the sliding movement of the second cover part 55 can be restricted by the fastening member 501. Specifically, even if a force is applied to the second cover part 55 to move it in the front-rear direction, the fastening member 501 gets caught on the first arc part 23 or the second arc part 24, so that the sliding movement of the second cover part 55 in the front-rear direction is restricted. Therefore, the second fixing spring 2b does not come off the engaging member 5, so that the light source unit 300 can be prevented from being accidentally detached from the frame unit 500.

The fastening member 501 is, for example, a screw, a bolt, or the like. In this embodiment, the fastening member 501 is a decorative screw. By using a decorative screw as the fastening member 501, the fastening member 501 can be fastened without using a jig such as a driver. The fastening member 501 is fastened to, for example, the second cover portion 55. Alternatively, a nut that screws onto the fastening member 501 may be provided.

Next, the operation of removing the light source unit 300 from the frame unit 500 will be described with reference to Figures 1 to 12. The operation of removing the light source unit 300 from the frame unit 500 can be performed at a low location such as a workbench, similar to the operation of attaching the light source unit 300 to the frame unit 500.

When removing the light source unit 300 from the frame unit 500, the worker first removes the fastening member 501 from the second cover part 55. Next, while pulling the first arc part 23 of the first fixed spring 2a or the second fixed spring 2b upward, the worker pulls the first cover part 51 or the second cover part 55 forward to release the engagement between the first arc part 23 of the first fixed spring 2a or the second fixed spring 2b and the protrusion part 63. Next, the worker similarly releases the engagement between the first arc part 23 of the remaining fixed spring 2 and the protrusion part 63. As a result, the engagement member 5 can slide freely in the second sliding direction D2 (forward).

Then, the operator slides the engaging member 5 in the second sliding direction D2 (forward). More specifically, the operator slides the engaging member 5 to the first position P1 (Figure 9). As a result, the engaging member 5 disengages from the fixed spring 2.

When the engaging member 5 is disengaged from the fixed spring 2, it becomes possible to remove the light source unit 300 from the frame body unit 500. Therefore, the worker slides the engaging member 5 in the second sliding direction D2 (forward) and then removes the light source unit 300 from the frame body unit 500. For example, the worker can remove the light source unit 300 from the frame body unit 500 by lifting the frame body unit 500 upward.

As described above with reference to Figures 1 to 12, according to this embodiment, the light source unit 300 can be attached to and detached from the frame unit 500 while the frame unit 500 is removed from the main unit 700. Therefore, the light source unit 300 can be easily attached to and detached from the frame unit 500.

In addition, according to this embodiment, there is no need to provide a gap between the frame unit 500 and the light source unit 300 for the operator to insert their fingers.

More specifically, in a configuration in which the light source unit is removed from a frame unit fixed to the ceiling, the light source unit needs to be pulled out from the frame unit. Therefore, it is necessary to provide a gap between the frame unit and the light source unit so that the worker can insert his/her fingers into the gap and pull out the light source unit from the frame unit. In contrast, according to this embodiment, the light source unit 300 can be attached/detached to/from the frame unit 500 with the frame unit 500 removed from the main unit 700, so there is no need to provide a gap between the frame unit 500 and the light source unit 300 so that the worker can insert his/her fingers into the gap.

In addition, according to this embodiment, since there is no need to provide a gap between the frame unit 500 and the light source unit 300 for an operator to insert his/her fingers, there is no need to reduce the area of the light-emitting surface of the light source unit 300 (the area of the underside of the cover member 301). Alternatively, the area of the light-emitting surface of the light source unit 300 can be secured without increasing the dimensions of the lighting fixture 100 (frame unit 500) when viewed in plan.

In addition, since the light source unit 300 can be attached to and detached from the frame unit 500 while the frame unit 500 is removed from the main unit 700, the light source unit 300 can be attached to and detached from the frame unit 500 at a low altitude. Therefore, the light source unit 300 can be attached to and detached from the frame unit 500 more easily than when working at a high altitude such as a ceiling.

In addition, according to this embodiment, the worker can attach and detach the light source unit 300 to and from the frame unit 500 by sliding the engagement member 5. Therefore, the light source unit 300 can be easily attached and detached to and from the frame unit 500.

Next, the frame unit 500 will be further described with reference to Figures 9, 10, and 13. As shown in Figures 9 and 10, the frame unit 500 further has a plurality of regulating members 520. The regulating members 520 regulate the upward movement of the light source unit 300. In other words, the regulating members 520 regulate the upward position of the light source unit 300.

In this embodiment, the frame unit 500 has four regulating members 520. The four regulating members 520 are provided at the four corners of the frame portion 510. Specifically, the first wall portion 511 supports two of the regulating members 520. The second wall portion 512 supports the remaining two regulating members 520.

Next, referring to FIG. 13, the restricting member 520 will be described using as an example the restricting member 520 provided at the corner where the first wall portion 511 and the third wall portion 513 intersect. FIG. 13 is an oblique view showing an enlarged portion of the light source unit 300 and the frame unit 500. In detail, FIG. 13 shows an enlarged view of the corner where the first wall portion 511 and the third wall portion 513 intersect and the vicinity thereof.

As shown in FIG. 13, the restricting member 520 has an attachment portion 521, a restricting portion 522, and a connecting portion 523. The attachment portion 521, the restricting portion 522, and the connecting portion 523 are, for example, plate-shaped. The frame unit 500 further has a fastening member 504. The first wall portion 511 has a groove portion 510a extending in the left-right direction. The groove portion 510a has an opening on the upper surface of the first wall portion 511.

The mounting portion 521 is attached to the upper surface of the first wall portion 511 by the fastening member 504. That is, the mounting portion 521 is supported on the upper surface of the frame portion 510. The restricting portion 522 is disposed inside the first wall portion 511. That is, the restricting portion 522 is disposed inside the frame portion 510. The fastening member 504 passes through the mounting portion 521 and is fastened to the groove portion 510a. Therefore, the fastening member 504 is fixed to the frame portion 510. The fastening member 504 is, for example, a screw, a bolt, or a bolt. The fastening member 504 may be, for example, a tapping screw.

The connecting portion 523 is connected to the mounting portion 521 and the restricting portion 522, and connects the mounting portion 521 and the restricting portion 522. Specifically, the connecting portion 523 extends downward from the mounting portion 521. The mounting portion 521 is connected to the upper end of the connecting portion 523. The restricting portion 522 is connected to the lower end of the connecting portion 523.

According to this embodiment, even if a force acts on the light source unit 300 to move the light source unit 300 upward, the restricting portion 522 of the restricting member 520 abuts against the mounting surface 302a, restricting the upward movement of the light source unit 300.

In addition, since the frame unit 500 has multiple restricting members 520, the workability of attaching the light source unit 300 to the frame unit 500 is improved. In particular, the worker can attach the light source unit 300 to the frame unit 500 without using a workbench.

Specifically, when attaching the light source unit 300 to the frame unit 500, the worker holds the lower surface of the cover member 301 with one hand and places the frame unit 500 over the light source unit 300 with the other hand. At this time, the regulating member 520 abuts against the mounting surface 302a of the light source unit 300, and the frame unit 500 is positioned relative to the light source unit 300. When the frame unit 500 is positioned relative to the light source unit 300 by the regulating member 520, the first arc portion 23 and the second arc portion 24 of the first fixed spring 2a face the opening 61 of the first notch portion 52a, and the first arc portion 23 and the second arc portion 24 of the second fixed spring 2b face the opening 61 of the second notch portion 54a. Next, the worker slides the engaging member 5 with the other hand to engage the engaging member 5 with the fixed spring 2.

As described above, since the frame unit 500 has multiple regulating members 520, the worker can attach the light source unit 300 to the frame unit 500 without using a workbench. In addition, since the frame unit 500 has multiple regulating members 520, the workability when removing the light source unit 300 from the frame unit 500 is also improved.

Next, the main unit 700 will be described with reference to Figs. 14 and 15. Fig. 14 is a perspective view showing the main unit 700, and Fig. 15 is another perspective view showing the main unit 700. In detail, Fig. 14 shows the main unit 700 viewed from diagonally below. Fig. 15 shows the main unit 700 viewed from a different diagonal below than Fig. 14. As shown in Figs. 14 and 15, the main unit 700 has a main body portion 710, a first reinforcing member 741, and a second reinforcing member 742.

The main body portion 710 forms the storage space S2. Specifically, the main body portion 710 has a main surface portion 711, a first side surface portion 712, and a second side surface portion 713. In this embodiment, the main surface portion 711 forms the upper wall of the main body unit 700. The first side surface portion 712 forms the right side wall of the main body unit 700. The second side surface portion 713 forms the left side wall of the main body unit 700. The main surface portion 711, the first side surface portion 712, and the second side surface portion 713 are plate-shaped.

More specifically, the first side portion 712 and the second side portion 713 face each other across the storage space S2. Specifically, the first side portion 712 and the second side portion 713 are connected to the main surface portion 711 and protrude downward from the main surface portion 711. The downward direction is an example of a first direction. In this embodiment, the first side portion 712 is connected to the right end portion of the main surface portion 711. The second side portion 713 is connected to the left end portion of the main surface portion 711. Therefore, the first side portion 712 and the second side portion 713 face each other in the left-right direction. The left-right direction is an example of a second direction perpendicular to the first direction.

As shown in FIG. 14, the first reinforcing member 741 is connected to the first side portion 712 and the second side portion 713, and connects the first side portion 712 and the second side portion 713. In this embodiment, the first reinforcing member 741 is provided on the front surface of the main unit 700. In other words, the first reinforcing member 741 is connected to the front end portion of the first side portion 712 and the front end portion of the second side portion 713.

As shown in FIG. 15, the second reinforcing member 742 is connected to the first side portion 712 and the second side portion 713, and connects the first side portion 712 and the second side portion 713. In this embodiment, the second reinforcing member 742 is provided on the rear surface of the main unit 700. In other words, the second reinforcing member 742 is connected to the rear end of the first side portion 712 and the rear end of the second side portion 713.

According to this embodiment, the main body 710 has a main surface 711, a first side surface 712, and a second side surface 713, and the first side surface 712 and the second side surface 713 face each other across the storage space S2. Therefore, since the main body 710 can be manufactured by press molding a plate-shaped member that is rectangular in plan view, the manufacture of the main body 710 is easier than, for example, manufacturing the main body 710 from a plate-shaped member that is cross-shaped in plan view. In addition, since the main body 710 can be manufactured from a plate-shaped member that is rectangular in plan view, the efficiency of parts removal is improved compared to, for example, manufacturing the main body 710 from a plate-shaped member that is cross-shaped in plan view.

Furthermore, according to this embodiment, the main unit 700 has a first reinforcing member 741 and a second reinforcing member 742. Therefore, the rigidity of the main unit 700 can be increased.

Next, the main unit 700 will be further described with reference to Figures 14 and 15. As shown in Figures 14 and 15, the height dimension (vertical dimension) of the first reinforcing member 741 and the second reinforcing member 742 is smaller than the height dimension (vertical dimension) of the first side portion 712 and the second side portion 713. Therefore, according to this embodiment, it is possible to reduce the material used in manufacturing the main unit 700. As a result, it is possible to reduce the weight of the main unit 700.

As shown in Figures 14 and 15, the main surface portion 711 has a first reinforcing rib 721 and a second reinforcing rib 722. The first reinforcing rib 721 and the second reinforcing rib 722 protrude downward from the main surface portion 711.

In this embodiment, the first reinforcing rib 721 is provided on the front surface of the main unit 700. Specifically, the first reinforcing rib 721 is connected to the front end of the main surface portion 711. The second reinforcing rib 722 is provided on the rear surface of the main unit 700. Specifically, the second reinforcing rib 722 is connected to the rear end of the main surface portion 711.

According to this embodiment, the rigidity of the main surface portion 711 can be increased by providing a first reinforcing rib 721 and a second reinforcing rib 722 on the main surface portion 711.

The main unit 700 will be further described with reference to Figures 14 and 15. As shown in Figures 14 and 15, the first reinforcing member 741 has a first spring bearing 741a, and the second reinforcing member 742 has a second spring bearing 742a.

The first mounting spring 4a described with reference to FIG. 6 engages with the first spring bearing 741a. The second mounting spring 4b described with reference to FIG. 6 engages with the second spring bearing 742a. The frame unit 500 is attached to the main unit 700 by engaging the first mounting spring 4a with the first spring bearing 741a and engaging the second mounting spring 4b with the second spring bearing 742a. The first mounting spring 4a and the second mounting spring 4b are an example of a second spring member, and the first spring bearing 741a and the second spring bearing 742a are an example of a second engagement portion.

In this embodiment, the first spring support 741a is provided on the inside (storage space S2 side) of the first reinforcing member 741. Similarly, the second spring support 742a is provided on the inside (storage space S2 side) of the second reinforcing member 742. Therefore, the first mounting spring 4a and the second mounting spring 4b are accommodated in the storage space S2. As a result, since the first mounting spring 4a and the second mounting spring 4b do not protrude outside the main unit 700, even if the lighting fixture 100 is fixed to a structure such as a ceiling or wall, the first mounting spring 4a and the second mounting spring 4b do not interfere with the ceiling board, beams in the ceiling, walls, etc.

As described with reference to FIG. 6, the first mounting spring 4a is fixed to the outer surface of the first wall portion 511, and the second mounting spring 4b is fixed to the outer surface of the second wall portion 512. In other words, the first mounting spring 4a and the second mounting spring 4b are arranged on the outer surface (outside) of the frame portion 510. Therefore, compared to the case where the first mounting spring 4a and the second mounting spring 4b are arranged on the inside of the frame portion 510, the work of engaging the first mounting spring 4a and the second mounting spring 4b with the first spring receiver 741a and the second spring receiver 742a is easier.

In the following description, when it is not necessary to distinguish between the first mounting spring 4a and the second mounting spring 4b, the first mounting spring 4a and the second mounting spring 4b may be referred to as "mounting spring 4". Similarly, when it is not necessary to distinguish between the first spring bearing 741a and the second spring bearing 742a, the first spring bearing 741a and the second spring bearing 742a may be referred to as "spring bearing 74".

Next, the engagement between the mounting spring 4 and the spring receiver 74 will be described with reference to FIG. 16. FIG. 16 is a diagram showing the mounting spring 4 engaged with the spring receiver 74. In detail, FIG. 16 shows the second mounting spring 4b when the frame body unit 500 to which the light source unit 300 is attached is attached to the main unit 700. In the following description, the frame body unit 500 to which the light source unit 300 is attached may be referred to as the "coupling unit 600."

As shown in FIG. 16, the mounting spring 4 is a kick spring or a torsion coil spring. The mounting spring 4 has a winding portion 41, a first protruding portion 42, and a second protruding portion 43. The spring receiver 74 also has a first spring receiver portion 74a and a second spring receiver portion 74b.

The first protrusion 42 protrudes diagonally upward from the winding portion 41. The second protrusion 43 protrudes diagonally upward from the winding portion 41 in a direction different from that of the first protrusion 42. Specifically, the first protrusion 42 protrudes diagonally upward to the right, and the second protrusion 43 protrudes diagonally upward to the left. In other words, the first protrusion 42 and the second protrusion 43 open in the left-right direction from the winding portion 41.

The winding portion 41 is formed by winding a linear spring member into a coil shape. When the first protrusion 42 changes from a predetermined position, the winding portion 41 generates a restoring force (elastic force) that returns the first protrusion 42 to the predetermined position. Here, the predetermined position is a position in which the first protrusion 42 protrudes from the winding portion 41 in a predetermined direction, and the predetermined direction indicates a direction diagonally upward to the right at a predetermined angle. Similarly, when the second protrusion 43 changes from a predetermined position, the winding portion 41 generates a restoring force (elastic force) that returns the second protrusion 43 to the predetermined position. Here, the predetermined position is a position in which the second protrusion 43 protrudes from the winding portion 41 in a predetermined direction, and the predetermined direction indicates a direction diagonally upward to the left at a predetermined angle.

The first spring receiving portion 74a and the second spring receiving portion 74b face each other in the left-right direction with a gap between them. Specifically, the first spring receiving portion 74a is provided to the right of the second spring receiving portion 74b.

The winding portion 41 is disposed between the first spring receiving portion 74a and the second spring receiving portion 74b. The first protrusion 42 abuts against the left end of the first spring receiving portion 74a, and the second protrusion 43 abuts against the right end of the second spring receiving portion 74b. Hereinafter, the position where the first protrusion 42 and the second protrusion 43 abut against the spring receiving portion 74 may be referred to as the "abutment position BP."

When the coupling unit 600 (frame unit 500 with the light source unit 300 attached) is attached to the main unit 700 by the attachment spring 4, a downward force acts on the winding portion 41 due to the weight of the light source unit 300 and the frame unit 500, and a force acts on the first protrusion 42 and the second protrusion 43 to change their posture to a posture protruding upward. The winding portion 41 generates a restoring force (elastic force) that resists this force. As a result, a force that maintains the posture of the attachment spring 4 acts from the first protrusion 42 and the second protrusion 43 to the first spring receiving portion 74a and the second spring receiving portion 74b, and the frame unit 500 is attached to the main unit 700.

The mounting spring 4 will be further described with reference to FIG. 16. As shown in FIG. 16, a first hook portion 42a is provided at the tip of the first protrusion 42. Similarly, a second hook portion 43a is provided at the tip of the second protrusion 43.

The first hook portion 42a and the second hook portion 43a are used when temporarily hanging the coupling unit 600 on the main unit 700. The work of attaching the coupling unit 600 to the main unit 700 will be described below with reference to Figs. 16 to 20. Figs. 17 to 20 are rear views showing the work of attaching the coupling unit 600 to the main unit 700. The coupling unit 600 is attached to the main unit 700 arranged on the ceiling C (Fig. 2). Therefore, the work of attaching the coupling unit 600 to the main unit 700 is done at a high altitude. For ease of understanding, the first reinforcing rib 721 and the second reinforcing rib 722 are omitted in Figs. 17 to 19.

When attaching the coupling unit 600 to the main unit 700, the worker hooks the first hook portion 42a and the second hook portion 43a of one of the first mounting spring 4a and the second mounting spring 4b to the first spring receiving portion 74a and the second spring receiving portion 74b of the corresponding spring receiving portion 74, respectively. As a result, the coupling unit 600 is temporarily suspended from the main unit 700 by one of the first mounting spring 4a and the second mounting spring 4b. At this time, the first protrusion portion 42 and the second protrusion portion 43 of one of the first mounting spring 4a and the second mounting spring 4b take a position in which they protrude upward from the winding portion 41.

Next, the worker hooks the first hook portion 42a and the second hook portion 43a of the other of the first mounting spring 4a and the second mounting spring 4b to the first spring receiving portion 74a and the second spring receiving portion 74b of the corresponding spring receiving portion 74, respectively. As a result, as shown in FIG. 17, the coupling unit 600 is temporarily suspended from the main unit 700 by the first mounting spring 4a and the second mounting spring 4b. At this time, the first protrusion 42 and the second protrusion 43 of the first mounting spring 4a and the second mounting spring 4b, respectively, are in a position protruding upward from the winding portion 41.

Then, as shown in Figures 18 and 19, the worker lifts the coupling unit 600. As a result, the abutment position BP of the first protrusion 42 and the second protrusion 43 approaches the winding portion 41, and when the distance L1 from the winding portion 41 to the abutment position BP becomes equal to or less than a predetermined distance, the coupling unit 600 is lifted by the restoring force (elastic force) of the winding portion 41, and the first protrusion 42 and the second protrusion 43 are held in a predetermined position as shown in Figure 20. As a result, the coupling unit 600 is attached to the main unit 700.

The height dimension (vertical dimension) of the main unit 700 will now be described with reference to Figures 17 to 20. As shown in Figures 17 to 20, in the process of mounting the coupling unit 600 to the main unit 700, the tip of the mounting spring 4 (first hook portion 42a and second hook portion 43a) approaches the main surface portion 711, and then moves away from the main surface portion 711 as the first protrusion portion 42 and the second protrusion portion 43 open widely in the left-right direction.

The main unit 700 has a height dimension that prevents the first hook portion 42a and the second hook portion 43a from contacting the main surface portion 711 when the vertical distance L2 from the spring receiver 74 to the first hook portion 42a and the second hook portion 43a is at its maximum. As a result, when the coupling unit 600 is attached to the main unit 700, the tip portion (the first hook portion 42a and the second hook portion 43a) of the mounting spring 4 can be prevented from interfering with the main surface portion 711.

Next, the lighting fixture 100 of this embodiment will be further described with reference to Figs. 21 to 23. Fig. 21 is a plan view showing the lighting fixture 100 of this embodiment. Fig. 22 is a cross-sectional view of the lighting fixture 100 taken along line A-A in Fig. 21. Fig. 23 is a cross-sectional view showing an enlarged portion of the lighting fixture 100 of this embodiment. In particular, Fig. 23 shows an enlarged portion of the cross-section of Fig. 22.

As shown in FIG. 22, the light source unit 300 further includes a light-emitting section 304. The light-emitting section 304 is attached to the lower surface of the base section 302. The cover member 301 covers the light-emitting section 304.

The light-emitting unit 304 has a wiring board 305 and at least one light source 306. The light source 306 is mounted on the wiring board 305. Wiring is formed on the wiring board 305. The wiring board 305 supplies the power generated by the power supply unit 303 described with reference to FIG. 4 to the light source 306. As a result, the light source 306 is turned on and emits light. Specifically, the wiring board 305 applies a DC voltage to the light source 306.

The light source 306 has an LED (Light Emitting Diode) element as a light emitting element. The light source 306 is, for example, a SMD (surface mount device) or a COB (chip on board).

As shown in FIG. 23, the bottom surface 301a of the cover member 301 is located above the bottom surface of the frame unit 500. In other words, the bottom surface 301a of the cover member 301 is located further back than the bottom surface of the frame unit 500. Therefore, part of the light emitted from the cover member 301 hits the frame portion 510 (the inner surfaces of the bottom ends of the first wall portion 511 to the fourth wall portion 514).

In this embodiment, the frame 510 has multiple elongated blades 515 provided on each of the first wall 511 to the fourth wall 514. The multiple blades 515 are arranged in parallel in the vertical direction to form a baffle (louver).

More specifically, the multiple blades 515 are provided on the inner surfaces of the lower ends of the first wall portion 511 to the fourth wall portion 514. For example, each blade 515 provided on the fourth wall portion 514 extends in the left-right direction. By having the multiple blades 515 (baffles) in the frame portion 510, it is possible to suppress the reflection of light downward at the frame portion 510. Therefore, when looking up at the lighting fixture 100 from below, the user is unlikely to feel glare when looking at the inner surfaces of the lower ends of the first wall portion 511 to the fourth wall portion 514.

In addition, in this embodiment, a gap H is formed between the lower end of the frame portion 510 (the lower ends of the first wall portion 511 to the fourth wall portion 514) and the lower end of the cover member 301. Therefore, light can be emitted from the side surface 301b of the lower end of the cover member 301. Therefore, the light emitted by the light-emitting portion 304 can be used efficiently for illumination.

The above describes embodiments of the present invention with reference to the drawings (Figs. 1 to 23). However, the present invention is not limited to the above embodiments, and can be implemented in various aspects without departing from the gist of the present invention. In addition, the components disclosed in the above embodiments can be modified as appropriate. For example, a component among all the components shown in one embodiment may be added to a component of another embodiment, or some of all the components shown in one embodiment may be deleted from the embodiment.

The drawings are primarily schematic illustrations of each component to facilitate understanding of the invention, and the thickness, length, number, spacing, etc. of each component shown may differ from the actual configuration due to the convenience of creating the drawings. Furthermore, the configuration of each component shown in the above embodiment is merely an 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.

For example, in the embodiment described with reference to Figures 1 to 23, the lighting fixture 100 is a recessed base light, but the lighting fixture 100 may be a direct-attached base light. A direct-attached base light is attached to a ceiling surface or a wall surface.

In addition, in the embodiment described with reference to Figures 1 to 23, the frame unit 500 is provided with a fastening member 501, but the fastening member 501 may be omitted.

In the embodiment described with reference to Figures 1 to 23, the fastening member 501 is provided on the second cover part 55 side, but the fastening member 501 may be provided on the first cover part 51 side. Alternatively, the fastening member 501 may be provided on both the first cover part 51 side and the second cover part 55 side.

In addition, in the embodiment described with reference to Figures 1 to 23, the protrusion 63 has an inclined portion 63a, but the inclined portion 63a may be omitted.

In the embodiment described with reference to Figures 1 to 23, the first cutout portion 52a and the second cutout portion 54a have the protrusion portion 63, but the protrusion portion 63 may be omitted. If the protrusion portion 63 is omitted, it is preferable to provide a fastening member 501 on the first cover portion 51 side as well.

In addition, in the embodiment described with reference to Figures 1 to 23, the frame unit 500 has a restricting member 520, but the restricting member 520 may be omitted.

In the embodiment described with reference to Figures 1 to 23, the main body portion 710 has the first side portion 712 and the second side portion 713, but the main body portion 710 may further have a third side portion and a fourth side portion. Here, the third side portion constitutes the front wall of the main body unit 700, and the fourth side portion constitutes the rear wall of the main body unit 700. Alternatively, the main body portion 710 may further have one of the third side portion and the fourth side portion. Note that when the main body portion 710 has the third side portion, the first reinforcing member 741 may be omitted. Similarly, when the main body portion 710 has the fourth side portion, the second reinforcing member 742 may be omitted.

In the embodiment described with reference to Figures 1 to 23, the main surface portion 711 has the first reinforcing rib 721 and the second reinforcing rib 722, but the first reinforcing rib 721 and the second reinforcing rib 722 may be omitted. Alternatively, one of the first reinforcing rib 721 and the second reinforcing rib 722 may be omitted.

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

[Appendix 1]
A lighting fixture fixed to a structure,
A main body unit fixed to the structure;
a frame unit that is detachably attached to the main unit;
a light source unit that is detachably attached to the frame unit,
the frame unit is detachably attached to the main body unit in a state in which the light source unit is attached to the frame unit,
The light source unit is detachably attached to the frame unit when the frame unit is not attached to the main unit.

[Appendix 2]
The light source unit includes a first spring member,
The frame unit includes:
an engaging member that engages with the first spring member;
a support portion that slidably supports the engagement member,
2. The lighting fixture of claim 1, wherein the engagement member slides between a first position spaced apart from the first spring member and a second position engaged with the first spring member.

[Appendix 3]
The frame unit further includes a frame portion,
the engaging member has a first engaging portion that engages with the first spring member,
The first engagement portion is disposed inside the frame portion,
The lighting device described in Appendix 2, wherein the first spring member engaged with the first engagement portion is stored inside the frame portion.

[Appendix 4]
The engaging member has a protrusion that restricts a sliding movement of the engaging member,
The lighting device described in Appendix 2 or Appendix 3, wherein the engagement member engages with the first spring member, causing the first spring member to engage with the protrusion portion, thereby restricting the sliding movement of the engagement member.

[Appendix 5]
The protrusion has an inclined portion,
5. The lighting device of claim 4, wherein the engagement member slides from the first position to the second position, causing the first spring member to slide over the inclined portion and overcome the protrusion.

[Appendix 6]
The engaging member has a cover portion that covers the first spring member,
The frame unit further includes a fastening member that penetrates the cover portion,
6. The lighting device according to claim 2, wherein the fastening member penetrates the cover portion and engages with the first spring member.

[Appendix 7]
The main unit includes:
a main body portion that forms an accommodation space that accommodates the frame unit and the light source unit;
A reinforcing member;
The main body portion has a first side portion and a second side portion opposed to each other with the accommodation space therebetween,
The lighting device according to any one of claims 1 to 6, wherein the reinforcing member connects the first side portion and the second side portion.

[Appendix 8]
The lighting device described in Appendix 7, wherein a height dimension of the reinforcing member is smaller than a height dimension of the first side portion and the second side portion.

[Appendix 9]
the main body further includes a main surface portion to which the first side surface portion and the second side surface portion are connected,
the first side surface portion and the second side surface portion protrude from the main surface portion in a first direction and face each other in a second direction perpendicular to the first direction;
9. The lighting device according to claim 7, wherein the main surface portion has a reinforcing rib protruding in the first direction.

[Appendix 10]
The frame unit further includes a second spring member,
10. The lighting device according to claim 7, wherein the reinforcing member has a second engagement portion with which the second spring member engages.

The present invention is useful for lighting fixtures such as base lights.

2: Fixed spring (first spring member)
2a: First fixed spring (first spring member)
2b: Second fixed spring (first spring member)
5: Engagement member 52: Right engagement portion (first engagement portion)
54: Left engaging part (first engaging part)
55: Second cover part (cover part)
63: Protrusion 63a: Inclined portion 100: Lighting device 300: Light source unit 500: Frame unit 501: Fastening member 510: Frame portion 513: Third wall portion (support portion)
514: Fourth wall part (support part)
700: Main unit C: Ceiling (structure)
P1: First position P2: Second position

Claims (5)

A lighting fixture fixed to a structure,
A main body unit fixed to the structure;
a frame unit that is detachably attached to the main unit;
a light source unit that is detachably attached to the frame unit,
the frame unit is detachably attached to the main body unit in a state in which the light source unit is attached to the frame unit,
the light source unit is detachably attached to the frame unit when the frame unit is not attached to the main unit,
The light source unit includes a first spring member,
The frame unit includes:
an engagement member that engages with the first spring member;
a support portion that slidably supports the engaging member;
Equipped with
The engagement member slides between a first position spaced from the first spring member and a second position engaged with the first spring member . The frame unit further includes a frame portion,
the engaging member has a first engaging portion that engages with the first spring member,
The first engagement portion is disposed inside the frame portion,
The lighting fixture according to claim 1 , wherein the first spring member engaged with the first engagement portion is housed inside the frame portion. The engaging member has a protrusion that restricts a sliding movement of the engaging member,
3 . The lighting device according to claim 1 , wherein the engaging member engages with the first spring member, thereby causing the first spring member to engage with the protrusion, thereby restricting a sliding movement of the engaging member. The protrusion has an inclined portion,
The lighting fixture according to claim 3 , wherein the engagement member slides from the first position to the second position, causing the first spring member to slide over the inclined portion and overcome the protrusion. The engaging member has a cover portion that covers the first spring member,
The frame unit further includes a fastening member that penetrates the cover portion,
The lighting fixture according to claim 1 , wherein the fastening member penetrates the cover portion and engages with the first spring member.

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