JP7729590B2 - lighting fixtures - Google Patents

Description

Applicable under Article 30, Paragraph 2 of the Patent Act. Published in "HABITATION STRUCTURAL LIGHTING 2021-2022 Vol. 186" published by ODELIC Co., Ltd. on May 31, 2021.

Patent Law Article 30, Paragraph 2 applied. Published in the publication "C-Channel Avoidance Type LED-SLIM" issued by ODELIC Co., Ltd. on December 1, 2020.

Article 30, paragraph 2 of the Patent Act applies. ODELIC Co., Ltd. sold the product to the stores listed in the "Store List" attached to the Certificate of Exception to Lack of Novelty submitted on August 31, 2021 between November 27, 2020 and August 2, 2021.

Article 30, paragraph 2 of the Patent Act applied. ODELIC Co., Ltd. published the patent on its website on October 30, 2020, November 7, 2020, December 17, 2020, June 14, 2021, and July 8, 2021.

The present invention relates to lighting fixtures that use LEDs as light sources.

A C-channel avoidance type lighting fixture is known in the past. It is a long lighting fixture that is installed by embedding it into a mounting hole in the ceiling. It includes a lighting fixture body with a hanging bolt through-hole that can be used to attach a hanging bolt installed in the ceiling, and an LED light source unit that can be attached to the lighting fixture body (Patent Document 1).

JP 2017-112048 A

However, in the lighting fixture disclosed in Patent Document 1, the suspension bolt through-hole is provided on the top surface of the lighting fixture body, so it is necessary to secure space inside the lighting fixture body to accommodate the suspension bolt and the nut for securing the suspension bolt. This increases the lighting fixture's height (thickness) and causes it to protrude significantly downward from the ceiling surface, which detracts from the fixture's appearance.

Furthermore, because the suspension bolt through-hole is located in a fixed position on the top surface of the lighting fixture body, if the suspension bolt through-hole overlaps with a C-channel in the ceiling when attaching the lighting fixture body to the suspension bolt, the lighting fixture body cannot be attached to the suspension bolt, posing the problem of having to modify the ceiling or other work.

The present invention was developed in consideration of the above-mentioned problems, and its purpose is to provide a lighting fixture that allows a suspension bolt to be attached without leaving space inside the lighting fixture body, and in which the position of the suspension bolt through hole can be changed.

To achieve the above objective, the lighting fixture of the present invention comprises an elongated lighting fixture body that is attached to a ceiling by a hanging bolt, and an elongated light source unit that has a light source that emits light, the lighting fixture body having a mounting member to which the hanging bolt is attached, the mounting member having a through-hole that the hanging bolt can pass through located outside the lighting fixture body, and being configured to be movable along the longitudinal direction of the lighting fixture body.

In the lighting fixture according to the present invention, the lighting fixture body preferably further includes an upper wall portion and side wall portions extending downward from both ends of the upper wall portion in the short direction, and the through hole of the mounting member is preferably located above the upper wall portion.

In the lighting fixture according to the present invention, the mounting member may have an upper surface facing the outer surface of the upper wall portion and having the through hole, and side surfaces extending downward from both ends of the upper surface, and may be configured so that when the suspension bolt is inserted through the upper surface, the space formed by the upper surface, the side surfaces, and the upper wall portion can accommodate the nut portion of the suspension bolt.

In the lighting fixture according to the present invention, it is preferable that the upper wall portion has a mounting through-hole extending along the longitudinal direction, and the mounting member is configured to be movable along the mounting through-hole.

In the lighting fixture according to the present invention, the light source unit comprises a mounting bracket facing the inner surface of the upper wall portion and a mounting spring attached to the mounting bracket, and is configured to be detachable from the lighting fixture body. The upper wall portion further comprises a spring through-hole through which the mounting spring can pass, and the mounting spring has a coil-shaped central portion provided on the mounting bracket and a protruding portion protruding outward in the short direction from the central portion, and the protruding portion may pass through the spring through-hole in a state where it is elastically deformed toward the center in the short direction, and return to its original state in both short direction outward, thereby being attachable to the lighting fixture body.

In the lighting fixture according to the present invention, it is preferable that the mounting bracket is configured to be movable in the longitudinal direction relative to the light source unit, that multiple spring through-holes are arranged longitudinally along the lighting fixture body, and that the mounting spring is configured to selectively engage with one of the multiple spring through-holes.

In the lighting fixture according to the present invention, the light source may be a plurality of LEDs arranged along the longitudinal direction of the light source unit.

The lighting fixture of the present invention allows for the installation of a hanging bolt without requiring space inside the lighting fixture body, and allows for the position of the hanging bolt through hole to be changed.

1 is an exploded perspective view showing a schematic configuration of a lighting fixture according to an embodiment of the present invention. FIG. 1 is a plan perspective view showing a state in which a lighting fixture according to an embodiment of the present invention is attached to a ceiling. 1 is a perspective view showing a schematic configuration of a lighting fixture according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the lighting fixture according to the present embodiment. FIG. 2 is a bottom view showing the configuration of the lighting fixture body according to the embodiment. FIG. 4 is a perspective view showing the positional relationship between the mounting member and the C channel according to the embodiment. 1 is a perspective view showing the positional relationship between the lighting fixture body and the ceiling structure (C channel) according to this embodiment. FIG. FIG. 2 is a perspective view showing the configuration of a light source unit according to the embodiment. FIG. 2 is an exploded perspective view showing the configuration of a unit main body according to the embodiment. FIG. 2 is a bottom perspective view showing the lighting fixture according to the embodiment attached to a ceiling.

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.

As shown in FIG. 1, 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 in a ceiling 6. Specifically, the lighting fixture 1 according to this embodiment includes an elongated lighting fixture body 10 that is attached to the ceiling 6 with a hanging bolt 7, and an elongated light source unit 30 that includes a light source 31 that emits light.

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.

As shown in Figure 2, 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 take various known shapes and mounting configurations, so detailed explanations will be omitted.

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.

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]
3 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 defines an accommodation recess 14 capable of accommodating the light source unit 30. The lighting fixture body 10 also includes a mounting member 17 to which a hanging bolt 7 is attached, 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 3 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 portion 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 lateral center of the upper wall portion 11, a pair of left and right inclined portions 11b sloping upward from both lateral ends of the upper wall center portion 11a, 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.

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 panel 6a.

As shown in Figures 3 and 5, the upper wall portion 11 has spring through holes 15 through which mounting springs 35 (described later) can pass, and multiple spring through holes 15 are arranged along the longitudinal direction of the lighting fixture body 10. Specifically, two spring through holes 15 are provided along the longitudinal direction near one longitudinal end of the upper wall portion 11, and two are provided along the longitudinal direction near the other end.

In addition, the spring through hole 15 has a diamond shape with corners in both the longitudinal and lateral directions when viewed from above. The mounting spring 35 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 mounting spring 35 engages with the corners formed in the lateral direction. The spring through hole 15 is formed with a length in the lateral direction that allows the mounting spring 35 to return to its original position toward both ends in the lateral direction; specifically, it is formed to extend from a portion of one upper wall edge portion 11c to a portion of the other upper wall edge portion 11c. The longitudinal length of the spring through hole 15 is formed to be the same as its length in the lateral direction.

As shown in Figures 3, 5, and 6, the upper wall portion 11 further includes a mounting through-hole 16 extending along the longitudinal direction, and is configured to allow mounting members 17 to be attached to the mounting through-hole 16. The mounting through-holes 16 are arranged in series with the spring through-holes 15 along the longitudinal direction of the lighting fixture body 10. Specifically, of the two spring through-holes 15 provided near one longitudinal end, one mounting through-hole 16 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 mounting through-hole 16 is provided near the longitudinal center end of the spring through-hole 15 provided toward the longitudinal center.

As shown in FIG. 6 , the mounting through-hole 16 is formed in a generally rectangular shape extending longitudinally in a top view. It has a sufficient length to allow the mounting member 17 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. Specifically, the mounting through-hole 16 has a length obtained by doubling the length of the mounting member 17 plus the width of the C-channel 9. More specifically, the mounting through-hole 16 has a length obtained by doubling the length of the mounting member 17 in the direction along the mounting through-hole 16 plus the length of the C-channel 9 in the direction along the mounting through-hole 16. This allows the mounting member 17 to be moved to a position where it does not interfere with the C-channel 9, regardless of the position of the C-channel 9 on the mounting through-hole 16. The mounting through-hole 16 also has a length in the short direction that is generally the same as that of the spring through-hole 15.

As shown in Figures 1, 3, and 4, the side wall portion 12 extends vertically downward from both short-side ends of the upper wall portion 11 and is formed along the entire longitudinal length of the upper wall portion 11. Furthermore, as shown in Figures 2 and 7, the side wall portion 12 is 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 7, the height length L of the side wall portion 12 is formed 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 side wall portion 12 is preferably formed to a height of 28.5 mm or less, and more preferably 25 mm or less. The height direction length L of the side wall portion 12 is the length from the upper surface of the locking portion 12b to the upper surface of the upper wall edge portion 11c.

As shown in Figures 4 and 7, 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 3, 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 plate 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 Figures 2 to 4, the mounting member 17 has a through hole 17d through which a suspension bolt 7 installed in the ceiling can pass. The through hole 17d is configured to be located outside the lighting fixture body 10, specifically above the upper wall portion 11. The mounting member 17 faces the outer surface of the upper wall portion 11 and is formed with a generally concave cross-section that opens downward. The top surface 17a has the through hole 17d, side surfaces 17b extending downward from both ends of the top surface 17a, and a bottom surface 17c extending outward from the side surfaces 17b. The mounting member 17 is configured so that, with the suspension bolt 7 passing through the through hole 17d, the nut portion 7a of the suspension bolt 7 is engaged with the top surface 17a by threading the nut portion 7a onto the threaded portion of the suspension bolt 7.

Furthermore, as shown in FIG. 4, the mounting member 17 is configured so that when the suspension bolt 7 is inserted through it, the nut portion 7a of the suspension bolt 7 can be accommodated within the space formed by the top surface 17a, side surface 17b, and upper wall portion 11. Specifically, the space in the mounting member 17 is hollow, and when the suspension bolt 7 is inserted through the through-hole 17d, a portion of the suspension bolt 7 and the nut portion 7a can be accommodated within the hollow space.

As shown in Figures 3 and 6, the upper surface 17a has a square shape when viewed from above and is large enough to allow the mounting through-hole 16 to pass through. A through-hole 17d is formed in the center of the upper surface 17a. The side surfaces 17b extend vertically downward from both ends of the upper surface 17a on the side wall portion 12 side and are tall enough to accommodate the suspension bolt 7. The lower surface 17c extends from the lower end of the side surface 17b to the side wall portion 12 and is configured to engage with the portion of the upper wall edge portion 11c formed between the mounting through-hole 16 and the side wall portion 12 when the mounting member 17 passes through the mounting through-hole 16 from below to above.

The mounting member 17 is also configured to be movable along the longitudinal direction of the lighting fixture body 10. Specifically, the mounting member 17 passes through the mounting through-hole 16 from bottom to top, and is configured to be movable along the mounting through-hole 16 while in this penetrated state.

As shown in Figures 3, 4, and 6, 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.

In this embodiment, the mounting member 17 is a metal member formed as a single unit, but this is not limited to this and various known materials can be used. Furthermore, the top surface 17a, side surface 17b, and bottom surface 17c may be configured as separate members.

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.

As shown in Figures 4 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 Figures 4 and 5, the light source unit housing 20 is a space formed in 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. 4, 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 with a length that does not exceed the length of the power supply housing 19 in the longitudinal direction. The power supply circuit components are various circuit components required to generate the light-emitting power of the multiple light sources 31. 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]
As shown in Fig. 1, the light source unit 30 is formed in an elongated shape extending along the longitudinal direction, and is configured to be detachable from the lighting fixture body 10. Specifically, the light source unit 30 is configured to be mounted in the light source unit accommodating section 20 of the lighting fixture body 10, and as shown in Fig. 4, when the light source unit 30 is mounted on the lighting fixture body 10, a board 32 (described later) provided on the light source unit 30 and a power supply device 2 provided on the lighting fixture body 10 are arranged along the short side direction of the light source unit 30.

As shown in Figures 8 and 9, the light source unit 30 includes a unit body 40, a long, rectangular substrate 32 on which light sources 31 are arranged in the longitudinal direction, side covers 33 that close both longitudinal ends of the unit body 40, a mounting bracket 34 that faces the inner surface of the upper wall portion 11 when attached to the lighting fixture body 10, and a mounting spring 35 that can be attached to the lighting fixture body 10.

As shown in FIG. 1, 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. As shown in FIG. 4, the unit body 40 has a shape that does not interfere with the power supply housing 19 when housed in 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 8 and 9, a rail portion 41a engageable with the mounting bracket 34 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 34 is inserted longitudinally from one end of the longer side of the unit body 40, the engaging surface 34b of the mounting bracket 34 (described below) engages with the hook portion of the rail portion 41a.

As shown in Figures 4 and 9, 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. Multiple light sources 31 are arranged along the longitudinal direction at one end of the substrate 32 in the lateral direction, and a screw through hole for passing a screw 60e is formed at the other end of the substrate 32 in the lateral direction. Specifically, the substrate 32 has an asymmetrical configuration in which the lateral distance to the end on the power supply housing 19 side, centered on the light source array consisting of multiple light sources 31, is shorter than the lateral distance to 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 light source 31 on the substrate 32 is positioned at the lateral center of the lighting fixture body 10 when the light source unit 30 is attached to the lighting fixture body 10. The top surface portion 41 has a length in the short direction that allows it to be accommodated between the inner side wall portion 19b of the lighting fixture body 10 and the side wall portion 12 on the side where the power supply housing portion 19 is not provided. The top surface portion 41 is also arranged parallel to the power supply housing portion 19.

8 and 9, the side surface portion 42 has a power supply housing-side side surface portion 42a located on the power supply housing 19 side when the light source unit 30 is attached to the lighting fixture body 10, and a side wall-side side surface portion 42b located on the side of the side wall 12 where 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 a portion of the inner lower wall portion 19c of the power supply housing 19 when the light source unit 30 is attached to the lighting fixture body 10. 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 body 40 is formed asymmetrically with respect to the center in the short direction.

As shown in Figure 8, a power receiving connector 4 is located on the outside of the power supply housing side surface 42a. It 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 located in a position that allows it to 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 4 and 8, the underside 43 has a pair of retaining portions 43a, one on each side in the lateral direction, formed at the lower end of the side 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 with an outwardly sloping surface. When the light source unit 30 is attached to the lighting fixture body 10, the sloping 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. 9 , 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 8, 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 FIG. 8, the mounting bracket 34 has a mounting surface 34a facing the upper surface 41 of the unit body 40 and a pair of engagement surfaces 34b extending downward from the mounting surface 34a. It has a generally concave cross-section that opens downward, allowing the mounting spring 35 to be attached. Specifically, the mounting bracket 34 has through holes formed near the center of its longitudinal direction and at both ends of its lateral direction, from the mounting surface 34a to the engagement surface 34b. The mounting spring 35 passes through the through holes formed at both ends of the lateral direction of the mounting bracket 34, and forms a coil-shaped central portion 35a with the mounting surface 34a as its axis, allowing the mounting spring 35 to be attached.

The mounting bracket 34 is also configured to be attachable to the unit main body 40. Specifically, one of the engagement surfaces 34b of the mounting bracket 34 is bent toward the center in the short direction, and when the mounting bracket 34 is inserted into the top surface portion 41 from one end in the longitudinal direction, the bent portion of the engagement surface 34b engages with the hook portion of the rail portion 41a of the top surface portion 41, allowing the mounting bracket 34 to be attached to the unit main body 40.

The mounting bracket 34 is also configured to be movable in the longitudinal direction relative to the light source unit 30. Specifically, the mounting bracket 34 is configured so that its movement in the longitudinal direction is restricted by a plurality of screws 60g provided along the longitudinal direction of the upper surface portion 41. In other words, the mounting bracket 34 is configured to be movable along the longitudinal direction of the upper surface portion 41 within a range defined by the plurality of screws 60g.

As shown in Figures 1, 3, and 8, the mounting spring 35 is formed in a V-shape with a coil-shaped central portion 35a and protruding portions 35b that protrude outward in the short direction from the central portion 35a. Temporary fastening portions 35c are formed at the end of each protruding portion 35b for temporarily fastening the light source unit 30 to the lighting fixture body 10. The mounting spring 35 is configured so that the protruding portions 35b pass through the spring through-holes 15 while elastically deforming toward the center in the short direction, and then return to their original position in both short direction outward directions while still being passed through, allowing it to be attached to the lighting fixture body 10. Specifically, when external pressure is applied to the central side of the short side of the protruding portion 35b of the mounting spring 35, the protruding portion 35b elastically deforms toward the central side of the short side. In this elastically deformed state, the protruding portion 35b passes through the spring through-hole 15 of the lighting fixture body 10. After passing through, the external pressure is released, causing the spring to return to its original shape and move outward in the short side. The protruding portion 35b engages with a corner formed at the end of the spring through-hole 15 in the short side, allowing the mounting spring 35 to be attached to the lighting fixture body 10.

The mounting spring 35 is configured to selectively engage with one of the multiple spring through holes 15 by moving the mounting bracket 34 longitudinally relative to the light source unit 30. Specifically, of the two spring through holes 15 provided near one longitudinal end and the other longitudinal end of the upper wall portion 11 of the lighting fixture body 10, the mounting spring 35 passes through the spring through hole 15 located in a position that does not cause interference between the mounting spring 35 and the C-channel 9 installed in the ceiling when the light source unit 30 is attached to the lighting fixture body 10, and is configured to engage with a corner formed at the short end of the spring through hole 15.

Mounting brackets 34 and mounting springs 35 are arranged in multiple locations along the longitudinal direction of the unit body 40. Specifically, one mounting bracket 34 and one mounting spring 35 are 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 method of using the lighting fixture 1 according to this embodiment will be described. As shown in FIG. 10 , 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 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 space is passed through the through-hole 17d formed in the top surface 17a of the mounting member 17, and the nut portion 7a is threaded onto the threaded portion (not shown) of the suspension bolt 7 through the mounting through-hole 16, locking the nut portion 7a to the top surface 17a. At this time, the mounting member 17 is moved to a suitable position so that it does not interfere with the C-channel 9 installed in the ceiling space. In this way, the lighting fixture body 10 is attached to the ceiling 6. After the lighting fixture body 10 is 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, with the mounting spring 35 of the light source unit 30 elastically deformed toward the center in the short direction, the light source unit 30 is inserted into the lighting fixture body 10, and the temporary fastening portion 35c of the mounting spring 35 is inserted into the spring through-hole 15 of the lighting fixture body 10. At this time, the mounting bracket 34 is moved to a suitable position so that the mounting spring 35 does not interfere with the C-channel 9 installed in the ceiling. After this insertion, the mounting spring 35 is restored to its original elastic deformation, and the temporary fastening portion 35c of the mounting spring 35 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 mounting spring 35 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 35b of the mounting spring 35 becomes smaller than the width of the spring through-hole 15, the mounting spring 35 returns to its original position. Then, as the mounting spring 35 returns to its original position, the base ends of the pair of protrusions 35b of the mounting spring 35 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 this embodiment]
As described above, the lighting fixture 1 of this embodiment comprises an elongated lighting fixture main body 10 attached to the ceiling 6 by a hanging bolt 7, and an elongated light source unit 30 having a light source 31 that emits light. The lighting fixture main body 10 comprises a mounting member 17 to which the hanging bolt 7 is attached. The mounting member 17 is configured so that a through hole 17d through which the hanging bolt 7 can pass is located outside the lighting fixture main body 10, and is configured so that it can move along the longitudinal direction of the lighting fixture main body 10.

With a lighting fixture 1 having this configuration, the through-hole 17d for attaching the suspension bolt 7 is located outside the lighting fixture body 10, eliminating the need to provide space inside the lighting fixture body 10 to accommodate the suspension bolt 7 and nut portion 7a. As a result, with the lighting fixture 1 according to this embodiment, the height dimension (thickness) of the lighting fixture 1 can be reduced, resulting in a lighting fixture with a sophisticated design that does not protrude downward from the ceiling board 6a. Furthermore, because the mounting member 17 is configured to be movable, it is possible to avoid interference with the C-channel 9, allowing the lighting fixture 1 to be easily attached without the need for complicated work such as cutting the C-channel 9.

In addition, in the lighting fixture 1 according to this embodiment, the lighting fixture body 10 further includes an upper wall portion 11 and side wall portions 12 extending downward from both short-side ends of the upper wall portion 11, and the through-hole 17d of the mounting member 17 is located above the upper wall portion 11.

A lighting fixture 1 with this configuration has the advantage that the through-hole 17d is located above the upper wall portion 11, improving the stability of the lighting fixture body 10 attached to the hanging bolt 7.

Furthermore, in the lighting fixture 1 according to this embodiment, the mounting member 17 faces the outer surface of the upper wall portion 11 and has an upper surface 17a with a through hole 17d, and side surfaces 17b extending downward from both ends of the upper surface 17a. When the suspension bolt 7 is inserted through the mounting member 17, the nut portion 7a of the suspension bolt 7 can be accommodated within the space formed by the upper surface 17a, side surfaces 17b, and upper wall portion 11.

With a lighting fixture 1 having this configuration, the hanging bolts 7 are not housed inside the lighting fixture body 10, which reduces the height dimension (thickness) of the lighting fixture 1. Furthermore, the power supply unit 2 and other components can be freely positioned inside the lighting fixture body 10 without having to consider the hanging bolts 7, allowing for a more compact lighting fixture.

In addition, in the lighting fixture 1 according to this embodiment, the upper wall portion 11 has a mounting through-hole 16 extending along the longitudinal direction, and the mounting member 17 is configured to be movable along the mounting through-hole 16.

A lighting fixture 1 with this configuration has the advantage of improving work efficiency, as the nut portion 7a can be attached to the threaded portion of the suspension bolt 7 located above the upper wall portion 11 through the mounting through-hole 16.

In addition, in the lighting fixture 1 according to this embodiment, the light source unit 30 includes a mounting bracket 34 facing the inner surface of the upper wall portion 11 and a mounting spring 35 attached to the mounting bracket 34, and is configured to be attachable to and detachable from the lighting fixture body 10. The upper wall portion 11 further includes a spring through-hole 15 through which the mounting spring 35 can pass. The mounting spring 35 has a coil-shaped central portion 35a provided on the mounting bracket 34 and a protruding portion 35b that protrudes outward in the lateral direction from the central portion 35a. The protruding portion 35b passes through the spring through-hole 15 while elastically deformed toward the center in the lateral direction, and returns to its original shape in both lateral directions, allowing it to be attached to the lighting fixture body 10.

A lighting fixture 1 with this configuration has the advantage that it can realize a detachable light source lighting fixture in which the light source unit 30 can be attached and detached to the lighting fixture main body 10 with a simple configuration, and that the light source unit 30 can be attached and detached to the lighting fixture main body 10 with a simple operation.

Furthermore, in the lighting fixture 1 according to this embodiment, the mounting bracket 34 is configured to be movable in the longitudinal direction relative to the light source unit 30, multiple spring through-holes 15 are arranged in the longitudinal direction along the lighting fixture body 10, and the mounting spring 35 is configured to selectively engage with one of the multiple spring through-holes 15.

With a lighting fixture 1 having this configuration, interference between the mounting spring 35 and the C-channel 9 can be prevented when attaching the light source unit 30 to the lighting fixture body 10, allowing the lighting fixture 1 to be attached without the need for complicated work such as cutting the C-channel 9.

[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.

For example, in the above-described embodiment, the through-hole 17d of the mounting member 17 is described as being located above the upper wall portion 11, but this is not limited to this. For example, the through-hole 17d may be located on the side of the lighting fixture body 10.

In addition, in the above-described embodiment, the mounting member 17 is described as having an upper surface 17a facing the outer surface of the upper wall portion 11 and having a through hole 17d, and side surfaces 17b extending downward from both ends of the upper surface 17a. However, this is not limited to this, and the mounting member 17 may have a configuration that does not have an upper surface 17a or side surfaces 17b.

Furthermore, in the above-described embodiment, the upper wall portion 11 is described as having a mounting through-hole 16 extending along the longitudinal direction, and the mounting member 17 is configured to be movable along the mounting through-hole 16. However, this is not limited to this. For example, the mounting member 17 may be formed to cover the lighting fixture body 10 and move along the lighting fixture body 10.

In addition, in the above-described embodiment, the light source unit 30 is described as comprising a mounting bracket 34 facing the inner surface of the upper wall portion 11 and a mounting spring 35 attached to the mounting bracket 34, and is configured to be detachable from the lighting fixture body 10. However, this is not limited to this, and it is sufficient that the light source unit 30 is configured to be detachable from the lighting fixture body 10.

Furthermore, in the above-described embodiment, the power supply device 2 is provided in the lighting fixture body 10, but this is not limited to this and may be provided in the light source unit 30, for example.

REFERENCE SIGNS LIST 1 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 Inclined portion, 11c Upper wall edge portion, 12 Side wall portion, 12a Return portion, 12b Locking portion, 13 End cover, 13a Locking piece, 14 Housing recess, 15 Spring through hole, 16 Mounting through hole, 17 Mounting member, 17a Upper surface, 17b Side surface, 17c Lower surface, 17d Through hole, 18 Mounting auxiliary member, 18a Middle portion, 18b Upper auxiliary portion, 18c Lower auxiliary portion, 19 Power supply housing portion, 19a Inner upper wall portion, 19b Inner side wall portion, 19c inner lower wall portion, 20 light source unit storage portion, 30 light source unit, 31 light source, 32 board, 33 side cover, 34 mounting bracket, 34a mounting surface, 34b engagement surface, 35 mounting spring, 35a central portion, 35b protrusion portion, 35c temporary fastening portion, 40 unit body, 41 upper surface portion, 41a rail portion, 42 side portion, 42a power supply storage portion side surface portion, 42b side wall portion side surface portion, 43 lower surface portion, 43a holding portion, 43b diffusion member, 60a to 60g screws

Claims (7)

A long lighting fixture body attached to the ceiling by a hanging bolt;
a long light source unit having a light source that emits light,
The lighting fixture body includes:
an upper wall portion having a mounting through hole extending along the longitudinal direction of the lighting fixture body;
side wall portions extending downward from both ends of the upper wall portion in the lateral direction;
a mounting member provided so as to penetrate the mounting through-hole from below to above, and to which the suspension bolt is attached;
It is equipped with
The mounting member is configured so that a through hole through which the suspension bolt can pass is located outside the lighting fixture body,
The mounting member has an upper piece facing the upper surface of the upper wall portion and a lower piece facing the lower surface of the upper wall portion, and is configured to be movable along the longitudinal direction of the mounting through hole when the upper wall portion is positioned between the upper piece and the lower piece . The mounting member is
a mounting member main body provided to pass through the mounting through hole from below to above;
an auxiliary mounting member that passes through the mounting through hole and is attached to the mounting member main body;
Equipped with
the mounting member body has the lower piece and is configured to be able to suppress upward movement of the mounting member body,
2. The lighting fixture according to claim 1, wherein the auxiliary mounting member has the upper piece and is configured to be able to suppress downward movement of the mounting member body . the mounting member has an upper surface facing the outer surface of the upper wall portion and having the through hole, and side surfaces extending downward from both end portions of the upper surface,
The lighting fixture according to claim 1 or 2, characterized in that, when the hanging bolt is inserted, the nut portion of the hanging bolt can be accommodated within the space formed by the top surface, the side surface, and the upper wall portion. the light source unit includes a mounting bracket facing the inner surface of the upper wall portion and a mounting spring attached to the mounting bracket, and is configured to be detachable from the lighting fixture body;
the upper wall portion further includes a spring through-hole through which the mounting spring can pass,
The lighting fixture described in any one of claims 1 to 3, characterized in that the mounting spring has a coil-shaped central portion provided on the mounting bracket and a protruding portion protruding outward in the short direction from the central portion, and is configured so that the protruding portion passes through the spring through hole in a state where it is elastically deformed toward the center in the short direction, and then returns to its original state in both short direction outward, thereby being able to be attached to the lighting fixture body. A long lighting fixture body attached to the ceiling by a hanging bolt;
a long light source unit having a light source that emits light;
Equipped with
the lighting fixture body includes an upper wall portion, side wall portions extending downward from both ends of the upper wall portion in a short side direction, and a mounting member to which the suspension bolt is attached;
the light source unit includes a mounting bracket facing the inner surface of the upper wall portion and a mounting spring attached to the mounting bracket, and is configured to be detachable from the lighting fixture body;
The mounting member is configured such that a through hole through which the suspension bolt can pass is located outside the lighting fixture body, and is configured to be movable along the longitudinal direction of the lighting fixture body,
the upper wall portion has a spring through-hole through which the mounting spring can pass,
the mounting bracket is configured to be movable in a longitudinal direction relative to the light source unit,
a plurality of the spring through holes are arranged along the longitudinal direction of the lighting fixture body,
The lighting fixture, wherein the mounting spring is configured to selectively engage with any one of the plurality of spring through holes. The through hole of the mounting member is located above the upper wall portion.
6. A lighting fixture according to claim 5. The lighting fixture described in claim 5 or 6, characterized in that the mounting spring has a coil-shaped central portion provided on the mounting bracket and a protruding portion protruding outward in the short direction from the central portion, and is configured so that the protruding portion passes through the spring through hole while elastically deformed toward the center in the short direction and returns to its original state in both short direction outward, thereby being attachable to the lighting fixture body .