lighting fixtures

Abstract

To provide a lighting fixture capable of attaching a hanging bolt without securing a space inside a lighting fixture body, and capable of changing the position of a hanging bolt through hole.SOLUTION: A lighting fixture comprises a long lighting fixture body attached to a ceiling with hanging bolts, and a long light source unit having a light source for emitting light. The lighting fixture body comprises a mounting member to which the suspension bolts are attached. The mounting member is configured such that a through-hole through which the suspension bolts can pass is positioned outside the lighting fixture body, and is configured to be movable along a longitudinal direction of the lighting fixture body.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a lighting fixture that uses an LED as a light source. [Background technology]

[0002] Conventionally, a C-channel avoidance type lighting fixture has been known, which is a long lighting fixture that is installed by embedding it into a mounting hole provided in the ceiling, and which comprises a lighting fixture body having a hanging bolt through-hole to which a hanging bolt provided in the ceiling can be attached, and an LED light source unit configured to be attachable to the lighting fixture body (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-112048 Summary of the Invention [Problem to be solved by the invention]

[0004] 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 fixing the suspension bolt. As a result, the dimension (thickness) of the lighting fixture in the height direction becomes large, and it protrudes significantly downward from the ceiling surface, which causes a problem of impairing the appearance.

[0005] Furthermore, since the suspension bolt through-hole is located at a fixed position on the top surface of the lighting fixture body, if the suspension bolt through-hole overlaps with a C-channel located above the ceiling when attaching the lighting fixture body to the suspension bolt, the lighting fixture body cannot be attached to the suspension bolt, and work such as modifying the ceiling will be necessary, which is a problem.

[0006] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a lighting fixture that allows a hanging bolt to be attached without requiring space inside the lighting fixture body, and that allows the position of the hanging bolt through hole to be changed. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, 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, wherein the lighting fixture body has a mounting member to which the hanging bolt is attached, and the mounting member is configured so that a through hole through which the hanging bolt can pass is located outside the lighting fixture body and is configured so that it can move along the longitudinal direction of the lighting fixture body.

[0008] In the lighting fixture of the present invention, it is preferable that the lighting fixture body further comprises an upper wall portion and side wall portions extending downward from both short-side ends of the upper wall portion, and that the through hole of the mounting member is located above the upper wall portion.

[0009] In the lighting fixture of 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 hanging bolt is inserted through it, the nut portion of the hanging bolt can be accommodated within the space formed by the upper surface, the side surfaces and the upper wall portion.

[0010] 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.

[0011] In the lighting fixture of 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 attachable to and detachable from the lighting fixture main body, the upper wall portion further comprising 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 is configured to pass through the spring through hole in a state where the protruding portion is elastically deformed toward the center in the short direction and restores to its original state outward in both short directions, thereby being attachable to the lighting fixture main body.

[0012] In the lighting fixture of the present invention, it is preferable that the mounting bracket is configured to be movable longitudinally relative to the light source unit, that the spring through-holes are arranged in multiple longitudinal directions along the lighting fixture body, and that the mounting spring is configured to selectively engage with any of the multiple spring through-holes.

[0013] 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. [Effects of the Invention]

[0014] According to the lighting fixture of the present invention, it is possible to provide a lighting fixture in which a suspension bolt can be attached without ensuring space inside the lighting fixture body, and in which the position of the suspension bolt through hole can be changed. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is an exploded perspective view showing a schematic configuration of a lighting fixture according to an embodiment of the present invention. [Figure 2] 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. [Figure 3] 1 is a perspective view showing a schematic configuration of a lighting fixture according to an embodiment of the present invention. [Figure 4] FIG. 2 is a cross-sectional view of the lighting fixture according to the present embodiment. [Figure 5]FIG. 2 is a bottom view showing the configuration of the lighting fixture body according to the embodiment. [Figure 6] FIG. 10 is a perspective view showing the positional relationship between the mounting member and the C channel according to the embodiment. [Figure 7] FIG. 2 is a perspective view showing the positional relationship between the lighting fixture body and the ceiling structure (C channel) according to the present embodiment. [Figure 8] FIG. 2 is a perspective view showing the configuration of a light source unit according to the embodiment. [Figure 9] FIG. 2 is an exploded perspective view showing the configuration of a unit main body according to the embodiment. [Figure 10] FIG. 2 is a bottom perspective view showing the lighting fixture according to the embodiment attached to a ceiling. DETAILED DESCRIPTION OF THE INVENTION

[0016] 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 according to the claims, and not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention. Furthermore, in the present embodiments, the scale and dimensions of each component may be exaggerated, and some components may be omitted.

[0017] 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 main body 10 that is attached to the ceiling 6 with a hanging bolt 7, and an elongated light source unit 30 that has a light source 31 that emits light.

[0018] 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 be used.

[0019] As shown in Fig. 2, the ceiling 6 has a plurality of C-channels 9 attached to a plurality of suspension bolts 8 provided above the ceiling, a plurality of M-bars (M) attached below the C-channels 9 so as to intersect with the C-channels 9 to form a framework, and a ceiling board 6a attached below the M-bars (M). The lighting fixture 1 is then attached to mounting holes 6b provided in the ceiling board 6a by a plurality of suspension bolts 7 provided above the ceiling. Note that the suspension bolts 7, 8, C-channels 9, and M-bars (M) can have various known shapes and mounting methods, and therefore detailed description thereof will be omitted.

[0020] In this embodiment, the direction in which lighting fixture 1 is attached to ceiling 6 is referred to as upward, and the direction in which light is emitted when lighting fixture 1 is attached to ceiling 6 is referred to as downward.

[0021] In addition, in this embodiment, the lighting fixture main body 10 and the light source unit 30 are described as separate components that can be attached to the lighting fixture main body 10, but this is not limited to this, and the lighting fixture main body 10 and the light source unit 30 may be configured as a single unit.

[0022] 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 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, which houses 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. With this configuration, it is possible to shift the communication device case to a position where it does not interfere with the C channel 9 installed above the ceiling. Note that the flexible connecting member may be, for example, a leaf spring or the like.

[0023] [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 define 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 power source of the facility.

[0024] In this embodiment, the top wall 11 and the side wall 12 of the lighting fixture body 10 can be made of a material such as aluminum, and the end cover 13 can be made of a material such as steel plate, but these materials are not limited to these. Also, in this embodiment, the top wall 11 and the side wall 12 are integrally formed, and the end cover 13 is formed as a separate member from the top wall 11 and the side wall 12, but this is not limited to this, and for example, the top wall 11 and the side wall 12 may be formed as separate members, or the top wall 11, the side wall 12, and the end cover 13 may be integrally formed.

[0025] 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 in a top view. The upper wall portion 11 has a shape in which the center portion in the lateral direction is slightly recessed downward, allowing the head of a screw 60a or the like to be accommodated. Specifically, the upper wall portion 11 has a concave cross-sectional shape including an upper wall center portion 11a formed near the center portion in the lateral direction of the upper wall portion 11, a pair of left and right inclined portions 11b inclined upward from both ends in the lateral direction 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.

[0026] The upper wall portion 11 may have a length in the longitudinal direction that is longer than the installation width of the C channel 9 provided above the ceiling, and specifically, the upper wall portion 11 may be formed with a length of 900 mm or more in the longitudinal direction. The upper wall portion 11 is 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 board 6a.

[0027] 3 and 5, the upper wall portion 11 is provided with spring through holes 15 through which mounting springs 35 (described later) can pass, and a plurality of the 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 spring through holes 15 are provided along the longitudinal direction near the other end.

[0028] Furthermore, the spring through hole 15 has a diamond shape with corners in the longitudinal and lateral directions when viewed from above, and is configured so that when the mounting spring 35 passes through the spring through hole 15 in a state where it is elastically deformed toward the center in the lateral direction and then returns to its original shape toward both ends in the lateral direction, 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 shape toward both ends in the lateral direction, and specifically, it is formed from a part of one upper wall edge portion 11c to a part of the other upper wall edge portion 11c. The length of the spring through hole 15 in the longitudinal direction is the same as its length in the lateral direction.

[0029] 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 so that a mounting member 17 can 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-side 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-side end of the spring through hole 15 provided toward the longitudinal center.

[0030] As shown in FIG. 6 , the mounting through hole 16 is formed in a generally rectangular shape extending along the longitudinal direction in a top view, and has a length sufficient to allow the mounting member 17 to be moved 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 has a length in the short direction that is generally the same as that of the spring through hole 15.

[0031] As shown in FIGS. 1, 3, and 4, the side wall portions 12 extend vertically downward from both short-side ends of the upper wall portion 11 and are formed over the entire longitudinal length of the upper wall portion 11. Also, as shown in FIGS. 2 and 7, the side wall portions 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 FIG. 7, the height length L of the side wall portions 12 is within the range between the lower surface 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 portions 12 are preferably formed to a height of 28.5 mm or less, and more preferably 25 mm or less. The length L of the side wall portion 12 in the height direction is the length from the upper surface of the locking portion 12b to the upper surface of the upper wall edge portion 11c.

[0032] 4 and 7, the side wall 12 includes a folded portion 12a formed by folding back from the lower end of the side wall 12 inward, and a locking portion 12b extending perpendicularly outward from the lower end of the side wall 12. Specifically, the folded portion 12a has a shape folded back from the lower end of the side wall 12 inward and upward, and is formed over the entire longitudinal length of the side wall 12. The folded portion 12a is configured to fill a gap between the side wall 12 and the light source unit 30 accommodated in the accommodation recess 14, as viewed from below, when the light source unit 30 is attached to the lighting fixture main body 10. The locking portion 12b is formed over the entire longitudinal length of the side wall 12 and is configured to engage with the ceiling board 6a when the lighting fixture main body 10 is attached to the ceiling 6.

[0033] 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. A locking piece 13a extending in the lateral direction is formed at the lower end of the end cover 13 and configured to lock with 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 longitudinal direction from the lower end of the end cover 13, and has a lateral length such that both lateral ends of the locking piece 13a match the lateral outer ends of the locking portion 12b of the side wall 12.

[0034] When a plurality of 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 portions of the plurality of lighting fixtures 1.

[0035] 2 to 4, mounting member 17 has through-hole 17d through which suspension bolt 7 installed in the ceiling can pass, and through-hole 17d is configured to be located outside lighting fixture body 10, specifically above upper wall 11. Mounting member 17 faces the outer surface of upper wall 11 and is formed with a generally concave cross-section that opens downward, and includes upper surface 17a having through-hole 17d, side surfaces 17b extending downward from both ends of upper surface 17a, and lower surface 17c extending outward from side surfaces 17b. Mounting member 17 is configured so that, with suspension bolt 7 passing through through-hole 17d, nut portion 7a of suspension bolt 7 is engaged with upper surface 17a by screwing nut portion 7a onto the threaded portion of suspension bolt 7.

[0036] 4, when the suspension bolt 7 is inserted through the mounting member 17, the mounting member 17 is configured so that the nut portion 7a of the suspension bolt 7 can be accommodated in the space formed by the upper surface 17a, the side surface 17b, and the upper wall portion 11. Specifically, the space in the mounting member 17 is a hollow space, and when the suspension bolt 7 is inserted through the through-hole 17d, a part of the suspension bolt 7 and the nut portion 7a can be accommodated in the hollow space.

[0037] As shown in FIGS. 3 and 6, upper surface 17a has a square shape in top view and is formed to a size that allows mounting through-hole 16 to pass through. Furthermore, a through-hole 17d is formed in the center of upper surface 17a. Side surface 17b extends vertically downward from both end portions of upper surface 17a on the side wall portion 12 side and has a height sufficient to accommodate suspension bolt 7. Lower surface 17c is formed to extend from the lower end of side surface 17b to side wall portion 12 and is configured to engage with a portion of upper wall edge portion 11c formed between mounting through-hole 16 and side wall portion 12 when mounting member 17 passes through mounting through-hole 16 from below to above.

[0038] The mounting member 17 is 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 below to above, and is configured to be movable along the mounting through-hole 16 while in the passed-through state.

[0039] 3, 4, and 6, one side surface 17b of mounting member 17 is provided with mounting auxiliary member 18 that can suppress vertical movement of mounting member 17 when lighting fixture body 10 is attached to suspension bolt 7. Specifically, mounting auxiliary member 18 is formed in a generally stepped cross section and includes intermediate portion 18a that faces a portion of upper wall edge portion 11c that is formed between mounting through-hole 16 and side wall portion 12, upper auxiliary portion 18b that extends upward from intermediate portion 18a, and lower auxiliary portion 18c that extends downward from intermediate portion 18a. When upper auxiliary portion 18b and one side surface 17b of mounting member 17 are fixed with screw 60c, the portion of upper wall edge portion 11c that is formed between mounting through-hole 16 and side wall portion 12 interferes with intermediate portion 18a, thereby suppressing vertical movement of mounting member 17.

[0040] In this embodiment, the mounting member 17 is a metal member formed as an integral part, but is not limited to this and various known materials can be used, and the upper surface 17a, side surface 17b, and lower surface 17c may be configured as separate members.

[0041] 1, the accommodating recess 14 is an open space formed by the top wall 11, the side wall 12, and the end cover 13. Specifically, the accommodating recess 14 includes a power supply accommodating section 19 capable of accommodating the power supply device 2, and a light source unit accommodating section 20 capable of accommodating the light source unit 30. The accommodating recess 14 includes the power supply accommodating section 19 on one of the side wall 12 sides, and is formed asymmetrically with respect to the center in the short direction.

[0042] 4 and 5, the power supply accommodating section 19 is an elongated hollow space formed on one of the side walls 12 of the accommodating recess 14 and extending in the longitudinal direction. Specifically, the power supply accommodating section 19 is formed in an elongated shape from the vicinity of the longitudinal center end of one of the mounting through holes 16 to the vicinity of the longitudinal center end of the other mounting through hole 16. The power supply accommodating section 19 also includes an inner upper wall section 19a facing the upper wall center section 11a of the upper wall section 11, an inner side wall section 19b extending downward from the inner upper wall section 19a, an inner lower wall section 19c extending from the inner side wall section 19b toward the side wall section 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.

[0043] The power supply accommodating section 19 is a hollow space enclosed by one upper wall edge 11c, the side wall 12 on the side where the power supply accommodating section 19 is formed, an inner side wall 19b, an inner lower wall 19c, and a power supply accommodating section cover, and is configured to be able to accommodate the power supply device 2 within this space. Specifically, the power supply accommodating section 19 has a size that is approximately one-third of the size of the accommodating recess 14 in the short direction. The power supply accommodating section 19 is configured to be located above the return portion 12a. Specifically, the inner lower wall 19c of the power supply accommodating section 19 is configured to contact the tip of the return portion 12a.

[0044] 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 the inclination 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 on the side of 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 is approximately the same as that of the inner upper wall portion 19a, and the outwardly bent portion of the inner side wall portion 19b has a length and inclination that are approximately the same as those 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 is approximately the same as that of the upper wall edge portion 11c.

[0045] 4 and 5, the light source unit accommodating section 20 is a space formed in the accommodating recess 14 excluding the power supply accommodating section 19. Specifically, the light source unit accommodating section 20 is an open space formed by the inner side wall 19b, the side wall 12 on the side where the power supply accommodating section 19 is not formed, and the upper wall 11 between the inner side wall 19b and the side wall 12.

[0046] 4, the power supply device 2 is formed with a size that can be accommodated in the power supply housing 19, and is configured to supply power to a plurality of 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 power supply board (not shown) formed in a long, rectangular shape that can be accommodated in 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 the power supply circuit components. The power supply device 2 is also positioned so that its bottom end is located below the bottom surface of the board 32, and is fixed to one side wall portion 12 with a screw 60d.

[0047] 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 required to generate light-emitting power for the multiple light sources 31. The power supply case member is a long, approximately semi-cylindrical metal cover member whose short-side length is long enough to be accommodated within the power supply housing 19 and whose longitudinal length 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.

[0048] 5, the power supply connector 3 is provided on the side wall 12 on the side where the power supply device 2 is provided, 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 configured to be connectable to a 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 with the wiring of the power supply device 2.

[0049] One end of the power supply device 2 is connected by wiring to the power supply connector 3, and the other end is connected by wiring to a power terminal block 5 provided on the side wall 12 on the side where the power supply device 2 is not provided. In addition, a wiring through-hole is formed in the side wall 12 on the side where the power supply device 2 is not provided, through which wiring can pass for electrically connecting the power terminal block 5 and the power supply device 2.

[0050] [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.

[0051] As shown in Figures 8 and 9, the light source unit 30 includes a unit body 40, a long substrate 32 on which the light sources 31 are arranged along 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.

[0052] As shown in FIG. 1, the unit body 40 is formed in an elongated shape having a length substantially equal to that of the lighting fixture body 10 in the longitudinal direction, and 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 in a substantially 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 lower surface side. The unit body 40 is also configured such that the upper surface 41 and the lower surface 43 are not close to each other in the height direction.

[0053] In this embodiment, the unit main 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, and for example, the upper surface portion 41, the side surface portion 42, and the lower surface portion 43 may be formed as separate members.

[0054] 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 in the short side direction of the upper surface portion 41, and its upper end is bent outward to form a generally hook-shaped cross section, and is configured so that an engagement surface 34b of the mounting bracket 34, which will be described later, engages with the hook portion of the rail portion 41a when the mounting bracket 34 is inserted from one end in the longitudinal direction of the unit body 40 along the longitudinal direction.

[0055] As shown in FIGS. 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. At one end of the substrate 32 in the lateral direction, a plurality of light sources 31 are arranged along the longitudinal direction, and at the other end of the substrate 32 in the lateral direction, a screw through hole is formed for passing the screw 60e therethrough. Specifically, the substrate 32 has an asymmetrical configuration in which the distance in the lateral direction from the light source array consisting of the plurality of light sources 31 to the end on the power supply housing 19 side is shorter than the distance in the lateral direction from the end on the opposite side. Because the substrate 32 has such an asymmetrical configuration in which the light source array consisting of the plurality of light sources 31 is closer to the power supply housing 19 side, the light source 31 on the substrate 32 is positioned at the center of the lateral direction 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 in parallel with the power supply housing portion 19.

[0056] 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 on which the power supply housing 19 is not provided. The power supply housing-side side surface portion 42a is formed by bending downward and outward from the end of the top surface portion 41, and has a shape that matches a part of the inner side wall portion 19b and a part 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. 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.

[0057] 8, a power receiving connector 4 is disposed on the outside of the power supply housing-side side surface portion 42a. The power receiving connector 4 is electrically connected to the power supply connector 3 and supplies power to the plurality of light sources 31 via wiring. Specifically, the power receiving connector 4 is disposed in a position where it can be connected 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 by various fixing members such as metal fittings.

[0058] 4 and 8, the lower surface portion 43 has a pair of holding 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 holding portions 43a. The holding portions 43a are formed with a generally triangular cross section having an outwardly inclined surface. When the light source unit 30 is attached to the lighting fixture body 10, the inclined surface of the holding portions 43a matches the return portion 12a of the side wall portion 12 located above the holding portions 43a, and the bottom surface of the holding portions 43a is formed horizontally with the bottom surface of the locking portion 12b. Furthermore, an opening with a generally U-shaped cross section that opens toward the center in the lateral direction is formed inside the holding portions 43a, and is configured to be able to hold the diffusion member 43b inserted from one longitudinal end.

[0059] The diffusion member 43b is formed in a long rectangular plate shape extending along 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.

[0060] As shown in FIG. 9 , the substrate 32 has a width length that can be accommodated in the upper surface portion 41 of the unit body 40, and is formed in a rectangular sheet shape that extends across the entire longitudinal area of ​​the upper surface portion 41. Furthermore, the light sources 31 are arranged in a 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 two or more substrates 32 may each have a light source 31. 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 device 2.

[0061] 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. One of the side covers 33 has a through hole formed therein for electrically connecting the board 32 and the power receiving connector 4 with a wire.

[0062] 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, and is formed with a generally concave cross section that opens downward, and is configured to be able to mount the mounting spring 35. Specifically, the mounting bracket 34 has through holes formed near the center in the longitudinal direction and at both ends in the lateral direction, from the mounting surface 34a to the engagement surfaces 34b, and the mounting spring 35 passes through the through holes formed at both ends in the lateral direction of the mounting bracket 34, and forms a coil-shaped central portion 35a with the mounting surface 34a as its axis, thereby enabling the mounting spring 35 to be mounted.

[0063] Moreover, the mounting bracket 34 is configured to be attachable to the unit main body 40. Specifically, one engagement surface 34b of the mounting bracket 34 is formed to be bent toward the center in the short side 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 a hook portion of the rail portion 41a of the top surface portion 41, thereby enabling the mounting bracket 34 to be attached to the unit main body 40.

[0064] Furthermore, the mounting bracket 34 is 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 limited 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.

[0065] 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 protruding outward in the short side 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 main body 10. The mounting spring 35 is configured so that the protruding portions 35b pass through the spring through-holes 15 in a state where they are elastically deformed toward the center in the short side direction, and then return to their original shape in both outward directions in the short side direction while still being passed through, thereby being mountable to the lighting fixture main body 10. Specifically, when external pressure is applied to the central side of the short side of the protrusion 35b of the mounting spring 35, the protrusion 35b elastically deforms toward the central side of the short side, and in this elastically deformed state, it passes through the spring through hole 15 of the lighting fixture main body 10, and after passing through, the external pressure is released, causing the spring to return to its original shape toward the outside of the short side, and the protrusion 35b engages with a corner formed at the end of the short side of the spring through hole 15, making it attachable to the lighting fixture main body 10.

[0066] The mounting spring 35 is configured to selectively engage with one of the plurality of spring through holes 15 by moving the mounting bracket 34 in the longitudinal direction 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 is configured to pass through the spring through hole 15 located at a position where the mounting spring 35 does not interfere with the C-channel 9 installed in the ceiling when the light source unit 30 is attached to the lighting fixture body 10, and to engage with a corner formed at the short end of the spring through hole 15.

[0067] A plurality of mounting brackets 34 and mounting springs 35 are arranged 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 longitudinal end.

[0068] [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 like this, lighting fixtures 1 of different lengths may be combined as needed to achieve a desired overall length for the multiple lighting fixtures 1. 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, and these may be connected by connecting parts (not shown).

[0069] 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 space is passed through the through-hole 17d 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 to lock the nut portion 7a to the upper surface 17a. At this time, the mounting member 17 is moved to a suitable position so that the mounting member 17 does not interfere with the C-channel 9 installed in the ceiling space. In this manner, 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 by wiring.

[0070] Next, with the mounting spring 35 of the light source unit 30 elastically deformed toward the center in the short side 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. Then, the power supply connector 3 of the lighting fixture body 10 and the power receiving connector 4 of the light source unit 30 are connected. Thereafter, by pushing the entire light source unit 30 up relative to the lighting fixture body 10, the mounting spring 35 passes through the spring through hole 15 while elastically deforming due to the reaction force from the spring through hole 15, and the mounting spring 35 returns to its original position when the width between the pair of protrusions 35b of the mounting spring 35 falls below the width of the spring through hole 15. Then, due to the restoration of the mounting spring 35, the base ends of the pair of protrusions 35b of the mounting spring 35 engage with the spring through hole 15, and the light source unit 30 is attached to the lighting fixture body 10. Note that the method of removing the light source unit 30 can be achieved by reversing the above-mentioned installation procedure, and therefore a description thereof will be omitted.

[0071] [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.

[0072] In the lighting fixture 1 having such a 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 the nut portion 7a. As a result, the lighting fixture 1 according to this embodiment can reduce the dimension (thickness) of the lighting fixture 1 in the height direction, 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, and the lighting fixture 1 can be easily attached without complicated work such as cutting the C-channel 9.

[0073] In addition, in the lighting fixture 1 of 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.

[0074] The lighting fixture 1 having such a configuration has an advantage that the through-hole 17d is located above the upper wall portion 11, and therefore the stability of the lighting fixture body 10 attached to the suspension bolt 7 is improved.

[0075] Furthermore, in the lighting fixture 1 of 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, and is configured so that when the hanging bolt 7 is inserted through it, the nut portion 7a of the hanging bolt 7 can be accommodated within the space formed by the upper surface 17a, the side surfaces 17b and the upper wall portion 11.

[0076] With a lighting fixture 1 having such a configuration, the hanging bolt 7 is not housed inside the lighting fixture body 10, so the height dimension (thickness) of the lighting fixture 1 can be reduced, and the power supply unit 2 and the like can be freely positioned inside the lighting fixture body 10 without having to consider the hanging bolt 7, making it possible to realize a smaller lighting fixture.

[0077] Additionally, in the lighting fixture 1 according to this embodiment, the upper wall portion 11 is provided with 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.

[0078] A lighting fixture 1 having such a configuration has the advantage that the nut portion 7a can be attached to the threaded portion of the hanging bolt 7 located above the upper wall portion 11 through the mounting through-hole 16, thereby improving work efficiency.

[0079] Furthermore, in the lighting fixture 1 according to this embodiment, the light source unit 30 comprises 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 main body 10, and the upper wall portion 11 further comprises a spring through hole 15 through which the mounting spring 35 can pass, and the mounting spring 35 has a coil-shaped central portion 35a provided on the mounting bracket 34 and a protruding portion 35b protruding outward in the short direction from the central portion 35a, and is configured so that the protruding portion 35b passes through the spring through hole 15 while elastically deformed toward the center in the short direction and returns to its original state outward in both short directions, thereby allowing it to be attached to the lighting fixture main body 10.

[0080] A lighting fixture 1 having such a configuration has a simple configuration that allows the light source unit 30 to be attached and detached to the lighting fixture main body 10, and has the advantage that the light source unit 30 can be attached and detached to the lighting fixture main body 10 with a simple operation.

[0081] Furthermore, in the lighting fixture 1 of this embodiment, the mounting bracket 34 is configured to be movable longitudinally relative to the light source unit 30, and multiple spring through holes 15 are arranged longitudinally 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.

[0082] With the lighting fixture 1 having such a 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, so the lighting fixture 1 can be attached without performing complicated work such as cutting the C channel 9.

[0083] [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.

[0084] 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, and for example, the through hole 17d may be located on the side of the lighting fixture main body 10.

[0085] Furthermore, 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, but 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.

[0086] 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, but this is not limited to this, and for example, the mounting member 17 may be formed to cover the lighting fixture main body 10 and move along the lighting fixture main body 10.

[0087] Furthermore, 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 main body 10, but this is not limited to this, and it is sufficient that the light source unit 30 has a configuration that allows it to be detachable from the lighting fixture main body 10.

[0088] Furthermore, in the above-described embodiment, the power supply device 2 is provided in the lighting fixture body 10, but this is not limitative. For example, the power supply device 2 may be provided in the light source unit 30. [Explanation of symbols]

[0089] 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, MM 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 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 circuit 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

1. 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 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 with the upper wall portion positioned between the upper piece and the lower piece. A lighting fixture characterized by:

2. 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, The mounting auxiliary member has the upper piece and is configured to be able to suppress downward movement of the mounting member main body.

2. The lighting fixture according to claim 1.

3. 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, When the suspension bolt is inserted through the wall, the nut portion of the suspension bolt can be accommodated in the space formed by the upper surface, the side surface, and the upper wall portion.

3. The lighting fixture according to claim 1 or 2.

4. 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 mounting spring has a coil-shaped central portion provided on the mounting bracket and protruding portions protruding outward in the short-side direction from the central portion, and is configured so that the protruding portions pass through the spring through-holes in a state where they are elastically deformed toward the center in the short-side direction and then return to their original state in both short-side directions, thereby being mountable to the lighting fixture main body.

4. The lighting fixture according to claim 1, wherein the light source is a light source.

5. 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 attachment spring is configured to selectively engage with any of the plurality of spring through holes. A lighting fixture characterized by:

6. The through hole of the mounting member is located above the upper wall portion.

6. A lighting fixture according to claim 5.

7. 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 returns to its original state in both short direction outward, thereby being mountable to the lighting fixture body.

7. A lighting fixture according to claim 5 or 6.

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