JP7716086B2 - lighting fixtures - Google Patents

Description

Article 30, paragraph 2 of the Patent Act applies. Published in "HABITATION STRUCTURAL LIGHTING 2021-2022 Vol. 186," a publication issued by ODELIC Co., Ltd. on May 31, 2021. Published in "C-Channel Avoidance Type LED-SLIM," a publication issued by ODELIC Co., Ltd. on December 1, 2020. Sold by ODELIC Co., Ltd. to the stores listed in the attached "Store List" between November 27, 2020 and August 2, 2021. Published on ODELIC Co., Ltd.'s website on October 30, 2020, November 7, 2020, December 17, 2020, June 14, 2021, and July 8, 2021.

The present invention relates to a lighting fixture.

Elongated LED lighting fixtures that are installed by embedding them in ceilings or other surfaces are known (see Patent Document 1). In such LED lighting fixtures, an LED board is placed near the center of the short side to achieve uniform light distribution, and a power supply device that supplies power to the LED board is placed on the back side of the LED board.

JP 2016-173883 A

However, the lighting fixture disclosed in Patent Document 1 has a power supply unit located on the back side of the LED board, which increases the height (thickness) of the lighting fixture. Therefore, when embedded in a ceiling, etc., there is a risk of interference with structures (such as so-called C-channels) present above the ceiling. Therefore, the lighting fixture of Patent Document 1 must be installed in a way that avoids C-channels and other above-the-ceiling structures, which creates a problem of restrictions on installation location. Due to these installation location restrictions, the lighting fixture of Patent Document 1 makes it difficult to achieve a highly designed lighting style, such as installing multiple lighting fixtures in a continuous, serial arrangement with no gaps, to create a single stripe of illumination light.

Furthermore, the lighting fixture in Patent Document 1 has the problem that the distance between the LED board and the diffusion cover is reduced in order to reduce the thickness, and the light diffusion performance of the LEDs is reduced due to the diffusion cover, which makes lighting unevenness more noticeable and may mar the appearance.

The present invention aims to provide a long lighting fixture that can reduce lighting unevenness while reducing the overall size of the fixture.

To achieve the above objective, the lighting fixture of the present invention comprises an elongated lighting fixture body that is attached to an installation location, an elongated light source unit that includes an elongated board on which light sources are arranged along the longitudinal direction, and a power supply device that supplies power to the light sources, with the board and power supply device being configured to be arranged inside the lighting fixture body along the short side of the lighting fixture body.

In the lighting fixture of the present invention, the lighting fixture body has a storage recess having an upper wall and side wall portions extending downward from both short-side ends of the upper wall, the storage recess having a power supply storage portion capable of storing the power supply device, the power supply storage portion being an elongated hollow space formed on one side wall of the storage recess and extending along the longitudinal direction, and the light source unit is configured to be detachable within the storage recess and preferably has a shape that does not interfere with the power supply storage portion when attached to the storage recess.

In the lighting fixture according to the present invention, the light source unit may be mounted between the power supply housing and the other side wall portion on which the power supply housing is not formed.

In the lighting fixture according to the present invention, it is preferable that the lighting fixture body further includes a folded portion formed by folding back the lower end of the side wall portion inward, and that the folded portion is configured to fill the gap between the side wall portion and the light source unit housed in the housing recess when viewed from below.

In the lighting fixture according to the present invention, the power supply housing may be located above the return portion.

In the lighting fixture according to the present invention, it is preferable that the light source units are formed asymmetrically with respect to the center in the short direction.

In the lighting fixture according to the present invention, the lower end of the power supply device may be positioned below the lower surface of the substrate.

In the lighting fixture according to the present invention, the light source is preferably a plurality of LEDs arranged along the longitudinal direction of the substrate.

In the lighting fixture according to the present invention, the light source unit may further include an upper surface portion that faces the upper wall portion when attached to the lighting fixture body and is capable of holding the circuit board, and a lower surface portion having a diffusion member for diffusing light emitted from the plurality of LEDs.

In the lighting fixture according to the present invention, it is preferable that the light source unit further includes a light guide panel having an incident surface facing the plurality of LEDs and a light guide portion extending downward from the incident surface.

The lighting fixture of the present invention can provide a long lighting fixture that can reduce the overall size of the fixture while suppressing lighting unevenness.

1 is an exploded perspective view showing a schematic configuration of a lighting fixture according to a first embodiment. 1 is a cross-sectional view of a lighting fixture according to a first embodiment. FIG. 2 is a plan perspective view showing the lighting fixture according to the first embodiment attached to a ceiling. 1 is a perspective view showing a schematic configuration of a lighting fixture according to a first embodiment of the present invention; FIG. 2 is a bottom view showing the configuration of the lighting fixture body according to the first embodiment. 1 is a perspective view showing the positional relationship between the lighting fixture body and the ceiling structure (C channel) in the first embodiment. FIG. FIG. 2 is a perspective view showing the configuration of a light source unit according to the first embodiment. FIG. 2 is an exploded perspective view showing the configuration of a unit main body according to the first embodiment. FIG. 2 is a bottom perspective view showing the lighting fixture according to the first embodiment attached to a ceiling. FIG. 10 is a perspective view showing a schematic configuration of a lighting fixture according to a second embodiment. FIG. 10 is a cross-sectional view of a lighting fixture according to a second embodiment.

Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. Note that the following embodiments do not limit the inventions claimed in the claims, and not all combinations of features described in the embodiments are necessarily essential to the solutions of the inventions. Furthermore, in the present embodiments, the scale and dimensions of each component may be exaggerated, and some components may be omitted.

[First embodiment]
1 and 2, the lighting fixture 1 according to this embodiment is a recessed lighting fixture that is installed by being recessed into a mounting hole 6b provided at the installation location. Specifically, the lighting fixture 1 includes an elongated lighting fixture body 10 that is attached to the installation location, an elongated light source unit 30 that includes an elongated substrate 32 on which light sources 31 are arranged along the longitudinal direction, and a power supply device 2 that supplies power to the light sources 31.

In this embodiment, the light source 31 is described as a plurality of LEDs arranged along the longitudinal direction of the substrate 32, but this is not limited to this, and various light sources such as organic EL can also be used.

In addition, in this embodiment, the ceiling 6 is used as an example of the installation location, but this is not limited thereto, and the lighting fixture 1 according to the present invention can be installed in various installation locations, such as a wall or the ground. In addition, in this embodiment, the direction in which the lighting fixture 1 is attached to the ceiling 6 is referred to as upward, and the direction in which light is emitted when the lighting fixture 1 is attached to the ceiling 6 is referred to as downward. However, the up and down directions referred to here are merely directions defined for the convenience of explanation, and are not necessarily the up and down directions in actual usage situations.

As shown in Figure 3, the ceiling 6 has multiple C-channels 9 attached to multiple suspension bolts 8 installed above the ceiling, multiple M-bars (M) attached below the C-channels 9 so that they intersect with the C-channels 9 to form a framework, and a ceiling panel 6a attached below the M-bars (M). The lighting fixture 1 is then attached to mounting holes 6b in the ceiling panel 6a using multiple suspension bolts 7 installed above the ceiling. Note that the suspension bolts 7, 8, C-channels 9, and M-bars (M) can be of various known shapes and installation methods, so detailed explanations will be omitted.

Furthermore, in this embodiment, the lighting fixture body 10 and the light source unit 30 are described as separate components that can be attached to the lighting fixture body 10, but this is not limited to this, and the lighting fixture body 10 and the light source unit 30 may be configured as a single unit.

The lighting fixture 1 according to the present embodiment may be non-dimmable and non-color-adjustable, or may be dimmable and color-adjustable. The lighting fixture 1 according to the present embodiment may also be configured to communicate with an external lighting control controller via wireless communication, such as wireless LAN or Bluetooth (registered trademark), allowing an operator to control the dimming, color adjustment, and on/off operations by operating the lighting control controller. When the lighting fixture 1 according to the present embodiment is configured to be wirelessly communicable, it is preferable to provide a communication device case (not shown) separate from the lighting fixture main body 10, housing communication devices including a communication antenna (not shown) and a communication control board (not shown). The communication device case and the lighting fixture main body 10 are connected by a flexible connecting member (not shown) having a predetermined length and electrically connected by a flexible communication cable or the like. In this case, the flexible connecting member is preferably long enough to allow the communication device case to be positioned outside the projected area of the lighting fixture main body 10. This configuration makes it possible to shift the communications equipment case to a position where it does not interfere with the C-channel 9 installed above the ceiling. The flexible connecting member can be, for example, a leaf spring or other member.

[Configuration of the lighting fixture body]
2 and 4 , the lighting fixture body 10 includes an upper wall 11, side wall portions 12 extending downward from both short-side ends of the upper wall 11, and end covers 13 closing both longitudinal ends of the lighting fixture body 10. The upper wall 11, side wall portions 12, and end covers 13 as a whole have a generally concave cross-section that opens downward, and define an accommodation recess 14 capable of accommodating the light source unit 30. The lighting fixture body 10 also includes a power supply device 2 that can be accommodated in the accommodation recess 14, a power supply connector 3 for electrically connecting the power supply device 2 to the power receiving connector 4 of the light source unit 30, and a power terminal block 5 for electrically connecting the power supply device 2 to the facility's power source.

In this embodiment, the top wall 11 and side wall 12 of the lighting fixture body 10 can be formed from a material such as aluminum, and the end cover 13 can be formed from a material such as steel plate, but these materials are not limited to these. In this embodiment, the top wall 11 and side wall 12 are formed integrally, and the end cover 13 is formed as a separate member from the top wall 11 and side wall 12. However, this is not limited to this. For example, the top wall 11 and side wall 12 may be formed as separate members, or the top wall 11, side wall 12, and end cover 13 may be formed integrally.

As shown in Figures 2 and 4, the upper wall portion 11 is formed in an elongated shape extending along the longitudinal direction and has a rectangular shape when viewed from above. The center of the upper wall portion 11 in the lateral direction is slightly recessed downward, allowing it to accommodate the head of a screw 60a or the like. Specifically, the upper wall portion 11 has a concave cross-section, including an upper wall center portion 11a formed near the center of the upper wall portion 11 in the lateral direction, a pair of left and right inclined portions 11b sloping upward from both ends of the upper wall center portion 11a in the lateral direction, and a pair of left and right upper wall edge portions 11c extending from the inclined portions 11b toward the upper end of the side wall portion 12. The upper wall center portion 11a and each inclined portion 11b form a recess capable of accommodating the head of a screw 60a or the like, and the recess has a depth sufficient to prevent the screw head from protruding above each upper wall edge portion 11c.

In this way, the central portion of the upper wall portion 11 in the short direction has a shape that is slightly recessed downward. As a result, when the upper wall central portion 11a and the inner upper wall portion 19a (described later) are fixed with screws 60a as shown in Figure 2, the screws 60a do not exceed the length of the side wall portion 12 in the height direction, thereby reducing the height dimension (thickness).

The upper wall portion 11 may also have a length in the longitudinal direction that is longer than the installation width of the C-channel 9 installed above the ceiling. Specifically, the upper wall portion 11 may be formed with a length in the longitudinal direction of 900 mm or more. The upper wall portion 11 is also formed with a length in both the longitudinal and lateral directions that allows it to be accommodated in the mounting hole 6b provided in the ceiling 6.

As shown in Figures 4 and 5, the upper wall portion 11 is provided with a plurality of spring through holes 15 along the longitudinal direction for passing V-shaped locking springs 34 (described later). Specifically, two spring through holes 15 are provided along the longitudinal direction near one longitudinal end of the upper wall portion 11, and two spring through holes 15 are provided along the longitudinal direction near the other end. The upper wall portion 11 is also provided with a plurality of mounting through holes 16 along the longitudinal direction for passing mounting members 17 (described later). Specifically, of the two spring through holes 15 provided near one longitudinal end, one is provided near the longitudinal center end of the spring through hole 15 provided toward the longitudinal center, and of the two spring through holes 15 provided near the other longitudinal end, one is provided near the longitudinal center end of the spring through hole 15 provided toward the longitudinal center.

When viewed from above, the spring through hole 15 has a diamond shape with corners in both the longitudinal and lateral directions. The V-shaped locking spring 34 passes through the spring through hole 15 while elastically deformed toward the center in the lateral direction, and is configured so that when it returns to its original position toward both ends in the lateral direction after passing through the spring through hole 15, the V-shaped locking spring 34 fits into the corners formed in the lateral direction. Furthermore, the spring through hole 15 is formed with a length in the lateral direction that allows the V-shaped locking spring 34 to return to its original position toward both ends in the lateral direction. Specifically, it is formed from a portion of one upper wall edge 11c to a portion of the other upper wall edge 11c.

When viewed from above, the mounting through-hole 16 is formed in a roughly rectangular shape extending along the longitudinal direction. Specifically, the mounting through-hole 16 has a length in the longitudinal direction sufficient to allow the mounting member 17 (described below) to move to a position where it does not interfere with the C-channel 9 provided in the ceiling when the lighting fixture body 10 is attached to the ceiling 6, and has a length in the lateral direction roughly matching that of the spring through-hole 15.

As shown in Figures 2 to 4, the upper wall 11 is provided with a mounting member 17 for attaching a suspension bolt 7 installed on the ceiling 6, and the mounting member 17 is configured to be movable along the mounting through-hole 16. The mounting member 17 is formed with a generally concave cross-section that opens downward, and includes an upper surface 17a with a through-hole for the suspension bolt 7 to pass through, a pair of side surfaces 17b extending downward from both ends of the upper surface 17a, and a lower surface 17c extending from the side surfaces 17b toward the side wall 12. The mounting member 17 is configured so that when the suspension bolt 7 is attached to the mounting member 17, the nut portion 7a of the suspension bolt 7 is accommodated in the space formed by the upper surface 17a, the side surfaces 17b, and the upper wall 11.

Furthermore, when the mounting member 17 passes through the mounting through-hole 16 from below to above, the underside 17c of the mounting member 17 engages with the portion of the upper wall edge 11c formed between the mounting through-hole 16 and the side wall 12. Furthermore, the mounting member 17 is formed to a size that allows it to pass through the mounting through-hole 16 in both the longitudinal and lateral directions; specifically, its length in the longitudinal direction is shorter than that of the mounting through-hole 16.

As shown in Figures 2 and 4, one side surface 17b of the mounting member 17 is provided with an auxiliary mounting member 18 that can restrict vertical movement of the mounting member 17 when the lighting fixture body 10 is attached to the suspension bolt 7. Specifically, the auxiliary mounting member 18 has a generally stepped cross section and includes an intermediate portion 18a that faces the portion of the upper wall edge 11c formed between the mounting through-hole 16 and the side wall 12, an upper auxiliary portion 18b that extends upward from the intermediate portion 18a, and a lower auxiliary portion 18c that extends downward from the intermediate portion 18a. When the upper auxiliary portion 18b is fixed to one side surface 17b of the mounting member 17 with a screw 60c, the portion of the upper wall edge 11c formed between the mounting through-hole 16 and the side wall 12 interferes with the intermediate portion 18a, restricting vertical movement of the mounting member 17.

With the mounting member 17 having this configuration, there is no need to provide space within the accommodation recess 14 (described below) to accommodate the nut portion 7a of the suspension bolt 7. The power supply device 2 and light source unit 30 can be aligned along the short side of the lighting fixture body 10, thereby reducing the height dimension (thickness) of the lighting fixture 1.

The sidewalls 12 extend vertically downward from both short-side ends of the upper wall 11 and extend along the entire length of the upper wall 11. As shown in Figures 3 and 6, the sidewalls 12 are formed to a length that does not interfere with the C-channel 9 in the height direction when the lighting fixture 1 is attached to the ceiling 6. Specifically, as shown in Figure 6, the height length L of the sidewalls 12 is within the range between the underside of the ceiling board 6a and the lower end of the C-channel 9, i.e., shorter than the combined length (28.5 mm) of the M-bar (M) in the height direction (19 mm) and the thickness (9.5 mm) of the ceiling board 6a. More specifically, the sidewalls 12 are preferably formed to a height of 28.5 mm or less, and more preferably 25 mm or less. The height length L of the sidewalls 12 is the length from the top surface of the engaging portion 12b to the top surface of the upper wall edge portion 11c.

2 and 6, the side wall 12 includes a folded portion 12a formed by folding back inward from the lower end of the side wall 12, and a locking portion 12b extending perpendicularly outward from the lower end of the side wall 12. Specifically, the folded portion 12a is folded upward and inward from the lower end of the side wall 12, and is formed over the entire longitudinal length of the side wall 12. Furthermore, when the light source unit 30 is attached to the lighting fixture body 10, the folded portion 12a is configured to fill the gap between the side wall 12 and the light source unit 30 housed in the housing recess 14, as viewed from below. The locking portion 12b is formed over the entire longitudinal length of the side wall 12, and is configured to lock with the ceiling panel 6a when the lighting fixture body 10 is attached to the ceiling 6.

As shown in Figures 1 and 4, the end cover 13 is configured to close both longitudinal ends of the lighting fixture body 10 and is fixed to the side wall 12 with screws 60b. Furthermore, a locking piece 13a extending in the short direction is formed at the lower end of the end cover 13 and is configured to lock onto the ceiling panel 6a when the lighting fixture body 10 is attached to the ceiling 6. Specifically, the locking piece 13a is formed by bending outward in the long direction from the lower end of the end cover 13, and has a short-side length such that both short-side ends of the locking piece 13a match the short-side outer ends of the locking portion 12b of the side wall 12.

In addition, when multiple lighting fixtures 1 are installed in a row on the ceiling board 6a, the end covers 13 may be formed only at the longitudinal ends of the lighting fixture body 10 where the lighting fixtures 1 are not connected. In other words, the end covers 13 may not be formed at the connection points between multiple lighting fixtures 1.

As shown in FIG. 1, the storage recess 14 is an open space formed by the top wall 11, side wall 12, and end cover 13. Specifically, the storage recess 14 includes a power supply storage section 19 capable of storing the power supply device 2, and a light source unit storage section 20 capable of storing the light source unit 30. The storage recess 14 includes the power supply storage section 19 on one side of the side wall 12, and is formed asymmetrically with respect to the center in the short direction.

2 and 5, the power supply accommodating section 19 is a long, hollow space formed on one side wall 12 of the accommodating recess 14 and extending in the longitudinal direction. Specifically, the power supply accommodating section 19 is formed in a long shape from near the longitudinal center end of one mounting through-hole 16 to near the longitudinal center end of the other mounting through-hole 16. The power supply accommodating section 19 also includes an inner upper wall 19a facing the upper wall center 11a of the upper wall 11, an inner side wall 19b extending downward from the inner upper wall 19a, an inner lower wall 19c extending from the inner side wall 19b toward the side wall 12 on which the power supply accommodating section 19 is formed, and a power supply accommodating section cover (not shown) that closes both longitudinal ends of the power supply accommodating section 19.

The power supply housing 19 is a hollow space enclosed by one upper wall edge 11c, the side wall 12 on the side where the power supply housing 19 is formed, the inner side wall 19b, the inner lower wall 19c, and the power supply housing cover, and is configured to be able to house the power supply unit 2 within this space. Specifically, the power supply housing 19 has a size in the short direction that is approximately one-third the size of the housing recess 14. The power supply housing 19 is configured to be located above the return portion 12a. Specifically, the inner lower wall 19c of the power supply housing 19 is configured to contact the tip of the return portion 12a.

The inner upper wall portion 19a extends horizontally in the short direction from near the center of the lighting fixture body 10 to the starting point of one of the inclined portions 11b. The inner upper wall portion 19a is fixed to the upper wall center portion 11a with a screw 60a. The inner side wall portion 19b extends vertically downward from the end of the inner upper wall portion 19a near the inclined portion 11b, and is bent outward near its lower end. The vertically extending portion of the inner side wall portion 19b has a length that roughly matches that of the inner upper wall portion 19a, while the outwardly bent portion of the inner side wall portion 19b has a length and inclination that roughly matches that of the inclined portion 11b. The inner lower wall portion 19c extends horizontally from the lower end of the inner side wall portion 19b outward to the side wall portion 12. The inner lower wall portion 19c has a length that roughly matches that of the upper wall edge portion 11c.

As shown in FIG. 2, the light source unit housing 20 is the space formed by the portion of the housing recess 14 excluding the power supply housing 19. Specifically, the light source unit housing 20 is an open space formed by the inner side wall 19b, the side wall 12 on the side where the power supply housing 19 is not formed, and the upper wall 11 between the inner side wall 19b and the side wall 12.

As shown in FIG. 2, the power supply device 2 is sized to fit within the power supply housing 19 and is configured to supply power to multiple light sources 31 (described below) via the power supply connector 3 and the power receiving connector 4. Specifically, the power supply device 2 includes a long, rectangular power supply board (not shown) that can fit within the power supply housing 19, various power supply circuit components (not shown) mounted on the power supply board, and a power supply case member (not shown) that covers the power supply board and power supply circuit components. The power supply device 2 is positioned so that its bottom end is located below the underside of the board 32, and is fixed to one of the side walls 12 with a screw 60d.

The power supply board is a long, rectangular printed circuit board whose longitudinal length does not exceed the length of the power supply housing 19. The power supply circuit components are various circuit components necessary for generating the light-emitting power of the multiple light sources 31 described below. The power supply case member is a long, approximately semi-cylindrical metal cover member with a short side length that can be accommodated within the power supply housing 19 and a longitudinal length that is approximately the same as the longitudinal length of the power supply board, and is configured to cover the periphery of the power supply board on which the power supply circuit components are mounted, except for the longitudinal ends.

As shown in Figure 5, the power supply connector 3 is provided on the side wall 12 on the side where the power supply unit 2 is installed, and has a length in the short direction that is approximately the same as the upper wall edge 11c. The power supply connector 3 is also configured to be connectable to the power receiving connector 4 provided on the light source unit 30. The power terminal block 5 is a terminal block that connects the facility's power source to the wiring of the power supply unit 2.

One end of the power supply unit 2 is connected to the power supply connector 3 via wiring, and the other end is connected to a power supply terminal block 5 provided on the side wall 12 on the side where the power supply unit 2 is not provided via wiring. Furthermore, the side wall 12 on the side where the power supply unit 2 is not provided has a wiring through-hole formed therein through which wiring can pass to electrically connect the power supply terminal block 5 and the power supply unit 2.

[Light source unit configuration]
1 and 7, the light source unit 30 is formed in an elongated shape extending along the longitudinal direction and is configured to be detachably attached to the accommodating recess 14 of the lighting fixture body 10. Specifically, as shown in Fig. 2, the light source unit 30 is configured to be attached between the power supply accommodating section 19 and the other side wall portion 12 of the lighting fixture body 10 where the power supply accommodating section 19 is not formed, i.e., to the light source unit accommodating section 20. The light source unit 30 also includes a unit body 40, an elongated substrate 32 on which light sources 31 are arranged along the longitudinal direction, side covers 33 that close both longitudinal ends of the unit body 40, and a V-shaped locking spring 34 for attaching the unit body 40 to the lighting fixture body 10.

As shown in Figures 2 and 7, the unit body 40 is formed in an elongated shape with a length that is approximately the same as that of the lighting fixture body 10 in the longitudinal direction, and as shown in Figure 2, its shape is such that it does not interfere with the power supply housing 19 when attached to the housing recess 14 of the lighting fixture body 10. Specifically, the unit body 40 is formed with a generally trapezoidal cross section and includes an upper surface 41, side surfaces 42 extending downward from the upper surface 41, and a lower surface 43 having a diffusion member 43b for diffusing light emitted from the multiple light sources 31. The upper surface of the upper surface 41 is configured to face the upper wall 11 when attached to the lighting fixture body 10, and to hold the board 32 on its underside. Furthermore, the unit body 40 is configured so that the upper surface 41 and the lower surface 43 are not close to each other in the height direction.

In this embodiment, the unit body 40, excluding the diffusion member 43b, is described as being integrally formed from a material such as aluminum, but this is not limited to this. For example, the top surface 41, side surface 42, and bottom surface 43 may be formed as separate members.

As shown in Figures 7 and 8, a rail portion 41a that can engage with the mounting bracket 35 (described later) is formed on the upper surface of the upper surface portion 41 along the longitudinal direction of the unit body 40. Specifically, the rail portion 41a protrudes upward from one end of the shorter side of the upper surface portion 41, and its upper end is bent outward to form a generally hook-shaped cross section. When the mounting bracket 35 is inserted longitudinally from one end of the longitudinal direction of the unit body 40, the engaging surface 35b of the mounting bracket 35 (described later) engages with the hook portion of the rail portion 41a.

As shown in Figures 2 and 8, a substrate 32 is disposed on the underside of the upper surface portion 41 and is fixed to the upper surface portion 41 by screws 60e. At one end of the substrate 32 in the lateral direction, multiple light sources 31 are arranged along the longitudinal direction, and at the other end in the lateral direction, a screw through hole is formed for passing the screw 60e through. Specifically, the substrate 32 has an asymmetrical configuration in which the distance from the light source array consisting of multiple light sources 31 to the end on the power supply housing 19 side is shorter than the distance from the end on the opposite side. Because the substrate 32 has such an asymmetrical configuration in which the light source array consisting of multiple light sources 31 is closer to the power supply housing 19 side, the substrate 32 is configured to be located at the center of the lateral direction of the lighting fixture body 10 when the light source unit 30 is attached to the housing recess 14. The top surface 41 has a length in the short side direction that allows it to be accommodated between the inner side wall 19b of the lighting fixture body 10 and the side wall 12 on the side where the power supply housing 19 is not provided. The top surface 41 is also arranged in parallel with the power supply housing 19. Specifically, the board 32 arranged on the underside of the top surface 41 and the power supply device 2 housed in the power supply housing 19 are arranged inside the lighting fixture body 10 along the short side direction of the lighting fixture body 10.

As shown in Figures 7 and 8, the side surface portion 42 has a power supply housing-side side surface portion 42a that is located on the power supply housing 19 side when the light source unit 30 is attached to the accommodating recess 14, and a side wall-side side surface portion 42b that is located on the side of the side wall 12 on which the power supply housing 19 is not provided. The power supply housing-side side surface portion 42a is formed by bending outward downward from the end of the top surface portion 41, and has a shape that matches a portion of the inner side wall portion 19b and inner lower wall portion 19c of the power supply housing 19 when the light source unit 30 is attached to the accommodating recess 14. Furthermore, the side wall-side side surface portion 42b is formed by extending vertically downward from the end of the top surface portion 41. In other words, the unit main body 40 is formed asymmetrically with respect to the center in the short direction.

As shown in Figure 7, a power receiving connector 4 is disposed on the outside of the power supply housing side surface 42a. The power receiving connector 4 electrically connects to the power supply connector 3 and supplies power to the multiple light sources 31 via wiring. Specifically, the power receiving connector 4 is positioned so that it can connect to the power supply connector 3 when the light source unit 30 is attached to the lighting fixture body 10, and is fixed to the unit body 40 with various fixing members such as metal fittings.

As shown in Figures 2 and 7, the lower surface portion 43 has a pair of retaining portions 43a, one on each side in the lateral direction, formed at the lower end of the side surface portion 42, and a diffusion member 43b configured to be attachable to the retaining portions 43a. The retaining portions 43a are formed with a generally triangular cross section having an outwardly sloped surface. When the light source unit 30 is attached to the storage recess 14, the sloped surface of the retaining portion 43a matches the return portion 12a of the side wall portion 12 located above the retaining portion 43a, and the bottom surface of the retaining portion 43a is formed horizontally with the bottom surface of the locking portion 12b. Furthermore, a generally U-shaped cross-sectional opening that opens toward the center in the lateral direction is formed on the inside of the retaining portion 43a, and is configured to hold a diffusion member 43b inserted from one longitudinal end.

The diffusion member 43b is formed in the shape of a long rectangular plate extending in the longitudinal direction, and is configured to be insertable into the holding portion 43a. Specifically, the diffusion member 43b is made of a material such as polycarbonate, and is configured to diffuse the light emitted from the light source 31 to the outside.

As shown in FIG. 8 , the substrate 32 has a width long enough to be accommodated in the upper surface 41 of the unit body 40, and is formed in a rectangular, sheet-like shape that extends across the entire longitudinal length of the upper surface 41. Furthermore, the light sources 31 are arranged in a single row along the longitudinal direction on the underside of the substrate 32. The light sources 31 may be arranged in two or more rows along the longitudinal direction. When two or more rows of light sources 31 are arranged on the substrate 32, two rows of light sources 31 may be arranged on one substrate 32, or light sources 31 may be arranged on two or more substrates 32. One longitudinal end of the substrate 32 is electrically connected to the power receiving connector 4 by wiring, and is configured to emit light from the multiple light sources 31 using power supplied from the power supply 2.

As shown in Figure 7, the side covers 33 are configured to close both longitudinal ends of the light source unit 30. Specifically, the side covers 33 are fixed to the longitudinal ends of the light source unit 30 with screws 60f. In addition, one of the side covers 33 has a through hole formed therein for electrically connecting the board 32 and the power receiving connector 4 via wiring.

As shown in Figure 7, the V-shaped locking spring 34 is generally V-shaped overall, with a coil-shaped central portion 34a and a pair of left and right protrusions 34b protruding outward in the short direction from the central portion 34a. A temporary fastening portion 34c is formed at the end of each protrusion 34b for temporarily fastening the light source unit 30 to the lighting fixture body 10.

The V-shaped locking spring 34 is configured so that it can be attached to the lighting fixture body 10 by passing through the spring through-hole 15 with its protrusion 34b elastically deformed toward the center in the short direction and then returning to its original shape outward in both short directions while in this passed state. Specifically, when external pressure is applied to the center side of the short direction of the V-shaped locking spring 34, the protrusion 34b elastically deforms toward the center in the short direction. In this elastically deformed state, the V-shaped locking spring 34 passes through the spring through-hole 15 of the lighting fixture body 10, and after passing through, the external pressure is released, causing the spring to return to its original shape outward in the short direction. The protrusion 34b engages with the corners formed at the short ends of the spring through-hole 15, allowing the spring 34b to be attached to the lighting fixture body 10.

As shown in Figure 7, a mounting bracket 35 is provided at the lower end of the V-shaped locking spring 34, which can connect the V-shaped locking spring 34 to the unit body 40. The mounting bracket 35 is configured to allow the V-shaped locking spring 34 to move longitudinally relative to the unit body 40. The mounting bracket 35 is formed with a generally concave cross-section that opens downward, and has a mounting surface 35a that faces the upper surface 41 of the unit body 40 and a pair of engagement surfaces 35b that extend downward from the mounting surface 35a.

In addition, through holes are formed near the longitudinal center and at both ends of the mounting bracket 35 in the lateral direction, from the mounting surface 35a to the engagement surface 35b. The V-shaped locking spring 34 passes through the through holes formed at both ends of the lateral direction of the mounting bracket 35, and the central portion 34a is formed in a coil shape with the mounting surface 35a as its axis, allowing the V-shaped locking spring 34 to be attached.

The mounting bracket 35 is also configured to be attachable to the unit body 40. Specifically, one engagement surface 35b of the mounting bracket 35 is bent toward the center in the short direction. When the mounting bracket 35 is inserted into the top surface portion 41 from one longitudinal end, the bent portion of the engagement surface 35b engages with the hook portion of the rail portion 41a of the top surface portion 41, allowing the mounting bracket 35 to be attached to the unit body 40. After attachment, the mounting bracket 35 is configured to be movable along the longitudinal direction of the top surface portion 41 within the installation width of multiple screws 60g provided on the top surface portion 41 of the unit body 40.

Note that multiple V-shaped locking springs 34 and mounting brackets 35 are arranged along the longitudinal direction of the unit body 40. Specifically, one V-shaped locking spring 34 and mounting bracket 35 is provided near one longitudinal end of the upper surface portion 41, and one is provided near the other end.

[How to use the lighting fixtures]
Next, a description will be given of an example of use of the lighting fixture 1 according to the first embodiment. As shown in FIG. 9 , the lighting fixture 1 according to the first embodiment can be installed in a continuous line on a ceiling panel 6a without any gaps. When installing multiple lighting fixtures 1 in series, lighting fixtures 1 of different lengths may be combined as needed to achieve a desired overall length. For example, among multiple lighting fixtures 1 arranged in series, the end lighting fixtures 1 arranged at both ends and the connecting lighting fixtures 1 arranged between them may have different lengths. Alternatively, multiple types of connecting lighting fixtures 1 of different lengths may be prepared and combined as needed to achieve a desired length. Furthermore, end covers 13 may not be provided between the end lighting fixtures 1 and the connecting lighting fixtures 1, or between the connecting lighting fixtures 1 themselves. These lighting fixtures may be connected by connecting parts (not shown).

To install the lighting fixture 1 on the ceiling panel 6a, first insert the lighting fixture body 10 into the mounting hole 6b provided in the ceiling 6 until the locking portion 12b of the side wall portion 12 contacts the ceiling panel 6a. During this insertion, the suspension bolt 7 installed in the ceiling is passed through a through-hole formed in the upper surface 17a of the mounting member 17, and the nut portion 7a is screwed onto the threaded portion (not shown) of the suspension bolt 7 through the mounting through-hole 16, locking the nut portion 7a to the upper surface 17a. In this way, the lighting fixture body 10 is attached to the ceiling 6. After the lighting fixture body 10 has been attached to the ceiling 6, the power terminal block 5 of the lighting fixture body 10 is connected to the facility's power source via wiring.

Next, the light source unit 30 is inserted into the accommodation recess 14 with the V-shaped locking spring 34 of the light source unit 30 elastically deformed toward the center in the short direction, and the temporary fastening portion 34c of the V-shaped locking spring 34 is inserted into the spring through-hole 15 of the lighting fixture body 10. After this insertion, the V-shaped locking spring 34 is restored to its original elastic deformation, and the temporary fastening portion 34c of the V-shaped locking spring 34 is hooked into the spring through-hole 15 of the lighting fixture body 10, thereby temporarily fastening the light source unit 30 to the lighting fixture body 10. The power supply connector 3 of the lighting fixture body 10 and the power receiving connector 4 of the light source unit 30 are then connected. Thereafter, by pushing the entire light source unit 30 up against the lighting fixture body 10, the V-shaped locking spring 34 elastically deforms due to the reaction force from the spring through-hole 15 and passes through the spring through-hole 15. When the width between the pair of protrusions 34b of the V-shaped locking spring 34 falls below the width of the spring through-hole 15, the V-shaped locking spring 34 returns to its original position. The return of the V-shaped locking spring 34 causes the base ends of the pair of protrusions 34b of the V-shaped locking spring 34 to engage with the spring through-hole 15, thereby attaching the light source unit 30 to the lighting fixture body 10. The method for removing the light source unit 30 can be achieved by reversing the above-described installation procedure, and therefore a description thereof will be omitted.

[Advantages of the lighting fixture according to the first embodiment]
Thus, the lighting fixture 1 of the first embodiment comprises an elongated lighting fixture body 10 that is attached to the installation location, an elongated light source unit 30 that has an elongated substrate 32 on which light sources 31 are arranged along the longitudinal direction, and a power supply device 2 that supplies power to the light sources 31, and the substrate 32 and the power supply device 2 are configured to be arranged inside the lighting fixture body 10 along the short side direction of the lighting fixture body 10.

With a lighting fixture 1 having this configuration, the board 32 and power supply device 2 are arranged along the short side of the light source unit 30, preventing the lighting fixture 1 from becoming too large in height (thickness). This prevents the lighting fixture 1 from interfering with the C channel 9 above the ceiling, eliminating the need to install lighting fixtures around the C channel 9. This eliminates large gaps between lighting fixtures 1 installed on the ceiling 6, allowing for the realization of a highly designed lighting style in which multiple lighting fixtures create a single stripe of illumination light.

In addition, in the lighting fixture 1 according to the first embodiment, the lighting fixture body 10 includes a storage recess 14 having an upper wall 11 and side wall 12 extending downward from both short-side ends of the upper wall 11. The storage recess 14 includes a power supply storage section 19 capable of storing the power supply device 2. The power supply storage section 19 is an elongated hollow space formed on one side of the side wall 12 of the storage recess 14 and extending along the longitudinal direction. The light source unit 30 is configured to be detachable within the storage recess 14 and has a shape that does not interfere with the power supply storage section 19 when attached to the storage recess 14.

With a lighting fixture 1 having this configuration, the power supply unit 2 and light source unit 30 can be accommodated within the height of the side wall portion 12, which reduces the thickness of the lighting fixture 1 in the height direction and prevents the lighting fixture 1 from protruding significantly from the installation location.

Furthermore, in the lighting fixture 1 according to the first embodiment, the light source unit 30 is mounted between the power supply housing 19 and the other side wall portion 12 on which the power supply housing 19 is not formed.

With a lighting fixture 1 having this configuration, the light source unit 30 and power supply device 2 are not housed in parallel in the height direction, allowing the lighting fixture 1 to be made thinner in the height direction.

Furthermore, in the lighting fixture 1 according to the first embodiment, the lighting fixture body 10 further includes a folded portion 12a formed by folding back inward from the lower end of the side wall portion 12, and the folded portion 12a is configured to fill the gap between the side wall portion 12 and the light source unit 30 housed in the housing recess 14 when viewed from below.

With a lighting fixture 1 having this configuration, when the lighting fixture 1 is installed on the ceiling 6 and turned on, no shadow is created between the side wall portion 12 and the light source unit 30, allowing for a lighting effect with a sophisticated design.

In addition, in the lighting fixture 1 according to the first embodiment, the power supply housing 19 is located above the return portion 12a.

With a lighting fixture 1 having this configuration, the power supply housing 19 is formed within the width of the upper wall portion 11 and the return portion 12a, allowing the lighting fixture 1 to be made thinner in the height direction.

In addition, in the lighting fixture 1 according to the first embodiment, the light source unit 30 is formed asymmetrically with respect to the center in the short side direction.

With a lighting fixture 1 having this configuration, the light source unit 30 can be attached to the lighting fixture body 10 without interference between the light source unit 30 and the power supply device 2 in the height direction, allowing the lighting fixture 1 to be made thinner in the height direction.

Furthermore, in the lighting fixture 1 according to the first embodiment, the lower end of the power supply device 2 is positioned below the lower surface of the substrate 32.

With a lighting fixture 1 having this configuration, it is possible to ensure a sufficient distance between the substrate 32 and the diffusion member 43b, thereby reducing uneven lighting.

Furthermore, in the lighting fixture 1 according to the first embodiment, the light source unit 30 further includes an upper surface portion 41 that faces the upper wall portion 11 when attached to the lighting fixture body 10 and is capable of holding the substrate 32, and a lower surface portion 43 that has a diffusion member 43b for diffusing light emitted from the multiple LEDs.

With a lighting fixture 1 having this configuration, a large distance can be secured between the substrate 32 and the diffusing member 43b, significantly reducing lighting unevenness.

[Variations]
The lighting fixture according to the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the technical concept of the present invention.

[Second embodiment]
A lighting fixture 100 according to the second embodiment will be described. Note that the same components as those in the lighting fixture 1 according to the first embodiment will be described using the same reference numerals. Furthermore, the method of using the lighting fixture 100 according to the second embodiment is the same as the method of using the lighting fixture 1 according to the first embodiment, and therefore a description thereof will be omitted. The lighting fixture 100 according to the second embodiment differs from the lighting fixture 1 according to the first embodiment in that the light source unit 30 further includes a light guide panel 50.

As shown in Figures 10 and 11, the light guide panel 50 is formed in an elongated shape extending along the longitudinal direction, and has the same length in the longitudinal direction as the lower surface portion 43. Specifically, the light guide panel 50 is formed in a rectangular cross section having an incident surface 51 facing the light source 31 and a light guide portion 52 extending downward from the incident surface 51. The light guide panel 50 is also formed from a material such as acrylic resin.

As shown in FIG. 11, the incident surface 51 has a width in the short direction that is approximately the same as the width of the light sources 31 arranged on the substrate 32, and is configured so that light emitted from the multiple light sources 31 is incident on the incident surface 51. The light guide section 52 is configured to diffuse the light incident on the incident surface 51 upward and downward from the side.

As shown in FIG. 11 , the light guide panel 50 is configured to be attachable to the underside portion 43 by being inserted into an insertion hole provided in the underside portion 43. Specifically, the diffusion members 43b of the underside portion 43 are bent upward near the center in the short side direction to form an insertion hole large enough to insert the light guide panel 50. After the light guide panel 50 is inserted into the insertion hole, the light guide panel 50 and the pair of bent diffusion members 43b are fixed with screws 60h, thereby enabling the light guide panel 50 to be attached to the underside portion 43.

[Advantages of the lighting fixture according to the second embodiment]
In the lighting fixture 100 according to the second embodiment, the light source unit 30 further includes a light guide panel 50 having an incident surface 51 facing the plurality of LEDs and a light guide portion 52 extending downward from the incident surface 51.

With a lighting fixture 100 having this configuration, the light emitted from the lighting fixture 100 is diffused not only downward but also upward, allowing the light to be diffused over a wider area.

[Other variations]
For example, in the above-described embodiment, the power supply accommodating section 19 is described as being formed on one side wall section 12 of the accommodating recess 14, but this is not limited to this and, for example, it may be formed on both side wall sections 12.

In the above-described embodiment, the lighting fixture body 10 further includes a folded portion 12a formed by folding back inward from the lower end of the side wall portion 12, and the folded portion 12a is described as being configured to fill the gap between the side wall portion 12 and the light source unit 30 housed in the housing recess 14 when viewed from below. However, this is not limited to this, and other configurations may be used as long as they are able to fill the gap between the side wall portion 12 and the light source unit 30.

Furthermore, in the above-described embodiment, the light source unit 30 was described as being formed asymmetrically with respect to the center of the short side. However, this is not limited to this. As long as the board 32 and power supply device 2 are arranged along the short side, the light source unit 30 may be formed symmetrically.

In addition, in the above-described embodiment, the light source unit 30 is described as being attached to the lighting fixture body 10 by a V-shaped locking spring 34, but this is not limited to this, and it may also be attached to the lighting fixture body 10 by various known components.

1, 100 Lighting fixture, 2 Power supply unit, 3 Power supply connector, 4 Power receiving connector, 5 Power supply terminal block, 6 Ceiling, 6a Ceiling plate, 6b Mounting hole, 7, 8 Hanging bolt, 7a Nut portion, 9 C channel, M M bar, 10 Lighting fixture body, 11 Upper wall portion, 11a Upper wall center portion, 11b Sloped portion, 11c Upper wall edge portion, 12 Side wall portion, 12a Return portion, 12b Locking portion, 13 End cover, 13a Locking piece, 14 Storage recess, 15 Spring through hole, 16 Mounting through hole, 17 Mounting member, 17a Upper surface, 17b Side surface, 17c Lower surface, 18 Mounting auxiliary member, 18a Middle portion, 18b Upper auxiliary portion, 18c Lower auxiliary portion, 19 Power supply storage portion, 19a Inner upper wall portion, 19b Inner side wall, 19c inner bottom wall, 20 light source unit housing, 30 light source unit, 31 light source, 32 circuit board, 33 side cover, 34 V-shaped locking spring, 34a center portion, 34b protrusion, 34c temporary fastening portion, 35 mounting bracket, 35a mounting surface, 35b engagement surface, 40 unit body, 41 upper surface, 41a rail portion, 42 side portion, 42a power supply housing side surface, 42b side wall side surface, 43 lower surface, 43a holding portion, 43b diffusion member, 50 light guide panel, 51 incident surface, 52 light guide portion, 60a-h screws

Claims (10)

A long lighting fixture body that can be attached to the installation location;
a long light source unit including a long substrate on which light sources are arranged along the longitudinal direction;
a power supply device that supplies power to the light source;
the lighting fixture body has an accommodating recess having an upper wall portion and side wall portions extending downward from both ends of the upper wall portion in a short side direction,
the accommodating recess has a power supply accommodating portion capable of accommodating the power supply device,
the power supply accommodating portion is an elongated hollow space formed on one side wall of the accommodating recess and extending along a longitudinal direction,
The light source unit is configured to be detachably attached to the accommodating recess,
The light source unit is
an upper surface portion configured to be able to hold the board and positioned between the power supply housing portion and the other side wall portion on which the power supply housing portion is not formed when the light source unit is attached to the housing recess;
a power supply accommodating section side surface portion extending downward from the power supply accommodating section side end portion of the short side direction of the top surface portion;
a side wall portion-side surface portion extending downward from the end portion on the other side wall portion side of the short-side end portion of the top surface portion;
and
the power supply housing side surface portion has a shape that does not interfere with the power supply housing portion when the light source unit is attached to the housing recess,
a lighting fixture configured so that the board and the power supply device are arranged inside the lighting fixture body along a short-side direction of the lighting fixture body; The lighting device described in claim 1, characterized in that the short-side distance from the light source to the end on the power supply accommodating section side of the substrate is shorter than the short-side distance from the light source to the end on the other side wall section side . The lighting fixture according to claim 1 or 2, wherein the light source unit is mounted between the power supply housing and the other side wall portion on which the power supply housing is not formed. The lighting fixture body further includes a folded portion formed by folding back a lower end of the side wall portion toward the inside,
The lighting fixture according to any one of claims 1 to 3, characterized in that the return portion is configured to fill a gap between the side wall portion and the light source unit accommodated in the accommodation recess when viewed from below. The lighting fixture according to claim 4 , wherein the power supply housing is located above the return portion. The lighting fixture according to any one of claims 1 to 5, wherein the light source units are formed asymmetrically with respect to the center in the short side direction. The lighting fixture according to any one of claims 1 to 6, wherein a lower end of the power supply device is located below a lower surface of the substrate. The lighting fixture according to any one of claims 1 to 7, wherein the light source is a plurality of LEDs arranged along the longitudinal direction of the substrate. The lighting fixture according to claim 8 , wherein the light source unit further comprises a lower surface portion having a diffusion member for diffusing the light emitted from the plurality of LEDs. The lighting fixture according to claim 8 , wherein the light source unit further comprises a light guide panel having an incident surface facing the plurality of LEDs and a light guide portion extending downward from the incident surface.