JP2014232713A - Lighting fixture - Google Patents

Abstract

Provided is a lighting fixture that makes it difficult to temporarily suspend a frame with a fixed spring on one side, and that the frame is temporarily suspended by a fixed spring on the opposite side. An instrument body is formed in a box shape with an open bottom surface and is installed in an embedded state in an opening provided in a ceiling material. The frame 5 is provided with a through hole so as to be connected to the opening of the instrument body, and is attached to the instrument body 4 using fixing springs 8A and 8B attached to a pair of inner walls 53 facing each other with the through hole interposed therebetween. The fixed springs 8A and 8B include a central portion 80 attached to the inner wall 53, and a pair of arm portions 81 that extend from both ends of the central portion 80 to both sides and are inserted into the holes 46 of the instrument body 4. At the tip of the arm portion 81, a hook-shaped locking portion 82 that locks with the peripheral edge of the hole 46 is provided at a position away from the central portion 80 by a predetermined distance. The arm portion 81 of one fixed spring 8B is provided with a step portion 83 that is engaged with the periphery of the hole 46 at a position that is shorter than the engagement portion 82 by a distance from the central portion 80. [Selection] Figure 1

Description

  The present invention relates to a lighting fixture.

  The thing of patent document 1 is illustrated as a prior art example of a lighting fixture.

  Patent Document 1 discloses an instrument main body that is fixed in a state of being suspended from the ceiling using a suspension bolt that is fixed to the ceiling, and an LED that is attached to the instrument main body with the lower surface exposed from the opening of the system ceiling. A lighting fixture with a unit is described.

  The LED unit includes a light source block storing LEDs, a translucent panel, and a frame. The frame is formed in a rectangular frame shape, and is attached in contact with the periphery of the opening of the system ceiling from below, and the light source block and the panel are placed on the upper side of the frame.

  Two fixing springs are attached to each of the pair of frame portions opposed to each other with the central opening portion interposed therebetween. The fixed spring is a torsion coil spring, and both arms extending so as to form a V shape from the central coil portion are given elastic force that spreads away from each other. Both arms of each fixed spring are locked in a groove of a spring receiver provided on the inner surface of the instrument body. When both arms expand in a direction away from each other, the frame is pulled upward, and the frame Is in contact with the lower surface of the system ceiling, and the frame is attached to the instrument body.

JP 2012-146493 A

  By the way, in the lighting fixture described in Patent Document 1, when the light source block is replaced or the panel is cleaned, when the LED unit is pulled downward against the spring force of the fixing spring, both arms of each fixing spring are released. It is pushed by the edge of the groove and bent in the direction approaching each other. By bending both arms of each fixed spring toward each other, the frame body is lowered downward, and the locking part formed by bending the tip of the arm of the fixed spring is caught by the edge of the groove, The light source block stops. If both arms of the fixed spring on one side are bent toward each other from this state, and the arm of the fixed spring is removed from the groove, the light source block is suspended by the fixed spring on the opposite side. It is possible to perform operations such as replacement of the light source block and cleaning of the panel in the state.

  Since the frame body has fixed springs attached to the pair of frame portions facing each other across the central opening, the frame body can be held in a suspended state by the fixed springs on either side. Is possible. However, when the lighting fixture is installed near the wall, if the fixing spring on the side close to the wall is removed, the work space between the frame suspended by the fixing spring on the opposite side and the wall becomes narrow. There was a problem that work was difficult.

  The present invention has been made in view of the above problems, and the object of the present invention is to make it difficult to temporarily suspend the frame with a fixed spring on one side, and to temporarily suspend the frame with a fixed spring on the opposite side. An object of the present invention is to provide a lighting apparatus.

  The lighting fixture of the present invention is formed in a box shape with an open bottom surface, and is installed in a state embedded in an opening provided in a ceiling material, a light source unit housed in the fixture main body, A through hole is provided so as to be connected to the opening of the instrument main body, and a frame attached to the instrument main body in a state where an upper surface is in contact with a peripheral edge of the opening in the ceiling material, and the through hole is closed. A translucent panel held by the frame, and the frame is attached to the instrument body using a fixing spring attached to each of a pair of frame portions facing each other with the through-hole interposed therebetween, The fixing spring includes a central portion attached to the frame portion, and a pair of arm portions that extend from both ends of the central portion to both sides so as to form a V shape and generate an elastic force that increases the distance between the two. The instrument body has a pair Corresponding to the fixing spring attached to each of the frame portions, a hole into which the arm portion is inserted is provided, and the tip of the arm portion is located at a position away from the central portion by a predetermined distance. A hook-shaped locking portion that locks with the periphery of the hole is provided, and the arm portion of the fixing spring that is attached to one of the pair of frame portions has a distance from the center portion of the locking portion. A stepped portion that is engaged with the periphery of the hole is provided at a shorter position.

  In this lighting fixture, the light source unit is held by the frame, and on the inner surface of the fixture main body, on the side close to the frame portion to which the fixing spring having the step portion is attached, an electric wire from an external power source and the A terminal block that relays and connects the wires from the light source unit is attached, and the light source unit is pulled out from the side close to the frame portion to which the fixing spring having the step portion is attached. It is also preferable to be configured as described above.

  In this lighting fixture, the light source unit includes a lighting device that turns on a light source by converting electric power supplied from the external power source via an electric wire connected to the terminal block, and the lighting device includes the stepped portion. It is also preferable that the wire connection part is attached to the light source unit so that the connection part of the electric wire is arranged on the side close to the frame part to which the fixing spring having the above is attached.

  In the lighting fixture of the present invention, when the frame is lowered, of the pair of frame portions to which the fixing spring is attached, one frame portion to which the fixing spring having the step portion is attached has the step portion at the periphery of the hole. Since it stops at the locking position, the gap formed between the instrument body and the other frame portion is small, and it is difficult to put a hand into this gap. Accordingly, it becomes difficult to remove the arm portion of the fixed spring having the step portion from the hole of the instrument body, and the operator removes the arm portion of the fixed spring not provided with the step portion from the hole of the instrument body. . Therefore, it is difficult to temporarily suspend the frame with a fixed spring on one side (fixed spring with no stepped portion), and the frame is temporarily suspended with a fixed spring on the opposite side (fixed spring with a stepped portion). A lighting fixture can be provided.

It is the disassembled perspective view which looked at the embodiment of the lighting fixture concerning the present invention from the upper part. It is the disassembled perspective view which looked at the same from the lower side. The fixed spring used for the above is shown, (a) is a front view, (b) is a bottom view. The other fixed spring used for the same is shown, (a) is a front view, (b) is a bottom view. It is a disassembled perspective view of the light source unit same as the above. The optical member in the above is shown, (a) is a perspective view seen from the front side, (b) is a perspective view seen from the back side, (c) is a perspective view enlarging the main part. It is principal part sectional drawing of the LED module in the same as the above. The optical member in the same as above is shown, (a) is a plan view showing an enlarged main part, (b) is a BB cross-sectional view, and (c) is a CC cross-sectional view. It is a perspective view in the state where the frame in the same was suspended temporarily. It is a perspective view which shows the state in the middle of attaching the frame in the same to an instrument main body. It is a perspective view of the state in which the frame in the same as the above was attached to the instrument main body. The state in the middle of removing the frame in the same from an instrument main body is shown, (a) is a front view, (b) is a sectional side view. It is a perspective view which shows the state in the middle of removing the frame in the same from an instrument main body.

  Hereinafter, embodiments of a lighting apparatus according to the present invention will be described with reference to the drawings.

  The lighting fixture of this embodiment is provided with the light source unit 1, the fixture main body 4, the frame 5, the panel 6, and the lighting device 7, as shown in FIG.1, FIG2 and FIG.9. Note that the vertical and forward / backward / left / right directions used in the following description are the directions defined in FIG. 1 unless otherwise specified.

  As shown in FIGS. 1, 2 and 9, the instrument body 4 has a rectangular flat plate 40 and a side plate 41 bent downward from the periphery of the top plate 40, and the lower surface is opened. It is formed in a rectangular box shape. At the lower end of each side plate 41, an outer flange 42 protruding outward is formed integrally with the side plate 41. A reinforcing member 420 made of a narrow metal plate is attached to the central portion of the top plate 40 (see FIG. 9). The reinforcing member 420 is provided with a plurality of (for example, three) long holes 421 in a line. The top plate 40 is provided with a through hole 402 corresponding to each of the plurality of long holes 421.

  The ceiling material 100 to which the instrument main body 4 is attached is provided with an opening 101 into which the instrument main body 4 is inserted from below (see FIG. 2). A building housing (not shown) on the upper side of the ceiling material 100 is provided with a plurality of (for example, three) suspension bolts 102 for fixing the appliance main body 4. When fixing the instrument main body 4 to the ceiling material 100, the instrument main body 4 is inserted into the opening 101 of the ceiling material 100 from below, the suspension bolt 102 is passed through the through hole 402 and the long hole 421, and the ceiling material 100. The outer collar 42 is brought into contact with the peripheral edge of the opening 101. In this state, when a nut (not shown) is screwed into the suspension bolt 102 protruding downward from the long hole 421, the fixture body 4 is fixed to the ceiling member 100.

  A power terminal block 43 and a signal terminal block 44 are attached to the right side of the lower surface of the top plate 40 (see FIG. 9). The top plate 40 is provided with through holes 401 in the vicinity of the power terminal block 43 and the signal terminal block 44. The power supply terminal block 43 is used for relay connection of a power supply line (not shown). The power supply line passed through the through hole 401 in the vicinity of the power supply terminal block 43 and the power supply line (not shown) from the lighting device 7. Are connected to each other. The signal terminal block 44 is used for relay connection of a signal line (not shown), and the signal line passed through the through hole 401 in the vicinity of the signal terminal block 44 and the signal line (not shown) from the lighting device 7. Are connected to each other. In other words, commercial power (AC power) is supplied to the lighting device 7 via the power terminal block 43, and a signal such as a dimming signal is input via the signal terminal block 44.

  Further, the left and right side plates 41 are provided with a stepped portion 45 at an intermediate portion in the vertical direction. The width dimension in the left-right direction of the instrument body 4 is formed so that the part below the step part 45 is wider than the part above the step part 45. In each of the left and right step portions 45, two holes 46 are formed with an interval in the front-rear direction. The hole 46 is formed from the step portion 45 to the side plate 41 above the step portion 45, and an arm portion 81 of a fixed spring (fixed spring 8A or fixed spring 8B) to be described later is inserted therein. In addition, the hole 46 formed in the step part 45 is provided with a curved surface 47 that is curved in an arc shape at both ends in the front-rear direction.

  The lighting device 7 is a printed wiring board (not shown) on which a power conversion circuit that converts AC voltage / current into DC voltage / current, an input terminal block 71, two output terminal blocks 72, a signal terminal block 73, and the like are mounted. Are housed in a metal case 70. The printed wiring board is formed in a rectangular plate shape with the left-right direction as the longitudinal direction. The input terminal block 71 and the signal terminal block 73 are mounted on one end side in the longitudinal direction of the printed wiring board, and the other longitudinal end of the printed wiring board. Two output terminal blocks 72 are mounted on the side. One end of the printed wiring board on which the input terminal block 71 and the signal terminal block 73 are mounted and the other end of the printed wiring board on which the output terminal block 72 is mounted are exposed from the case 70.

  The light source unit 1 includes four LED modules 2 and a reflector 3 as shown in FIGS.

  The reflector 3 has a rectangular flat plate-shaped mounting plate 30 and four reflecting plates 31 bent and raised downward from the periphery of the mounting plate 30, and is formed in a box shape having an open lower surface. Further, an outer casing 32 that projects outward is formed integrally with the reflecting plate 31 at the lower end of each reflecting plate 31. A case 70 of the lighting device 7 is screwed to the upper surface of the mounting plate 30 using a fixing screw. The lighting device 7 is attached to the rear side of the attachment plate 30 so that the longitudinal direction of the case 70 is parallel to the left-right direction and the input terminal block 71 and the signal terminal block 73 face the right side.

  As shown in FIG. 5, each LED module 2 has a rectangular substrate 20, a plurality of LEDs 21 mounted on one surface (lower surface) of the substrate 20, and the entire lower surface of the substrate 20 except for the region where the LEDs 21 are mounted. A covering sheet-like reflecting member 22 and an optical member 23 are provided. In the present embodiment, the substrate 20, the reflecting member 22, and the optical member 23 are formed in a square shape in plan view, but the shapes of the substrate 20, the reflecting member 22, and the optical member 23 are not limited to a square, and are formed in an appropriate shape. It only has to be done.

  The LED 21 is a commercially available package type white LED. A plurality of lands (not shown) are provided on the lower surface of the substrate 20 at predetermined intervals in the left-right direction and the front-rear direction. The plurality of LEDs 21 are mounted (surface mounted) on the lower surface of the substrate 20 by soldering electrodes (not shown) to the corresponding lands.

  The plurality of lands described above are formed on the lower surface of the substrate 20 in rows and columns at regular intervals, and the conductive foil (copper foil) that electrically connects the lands is patterned so as to form a desired circuit. Has been. A receptacle connector 24 is mounted on the lower surface of the substrate 20 at the outer edge of the central portion in the short direction (see FIG. 5). The receptacle connector 24 is electrically connected to the LED 21 soldered to the land via a conductor foil formed on the substrate 20 and is connected to an output line from the lighting device 7 (not shown). ) And removably connected.

  In the present embodiment, the conductive foil that connects all the LEDs 21 in series is patterned on the substrate 20, and when the plug connector is connected to the receptacle connector 24, all the LEDs 21 are connected between the outputs of the lighting device 7. It will be connected in series. The substrate 20 may be formed with a circuit for connecting a plurality of LEDs 21 in parallel, or may be formed with a circuit for connecting a plurality of series circuits of LEDs 21 in parallel. . Moreover, it is not always necessary to mount the LEDs 21 on all lands, and the LEDs 21 may be mounted by thinning out some lands.

  The reflection member 22 is formed by forming a reflection layer made of a material having a relatively high reflectance on the surface (lower surface) of a sheet material made of an insulating material such as synthetic rubber or synthetic resin. A plurality of through holes 220 are formed in the reflecting member 22 at positions corresponding to the LEDs 21 mounted on the substrate 20. The reflecting member 22 is disposed so as to be in contact with the entire lower surface of the substrate 20 and overlaps with the substrate 20. When the reflecting member 22 is disposed so as to overlap with the substrate 20, the reflecting member 22 corresponds to the through hole 220 of the reflecting member 22. The LED 21 is exposed. In the state where the reflecting member 22 is placed on the substrate 20, the light directly incident on the reflecting member 22 from the LED 21 or the light reflected or refracted inside the optical member 23 and incident on the reflecting member 22 is reflected. Reflected downward by the member 22. In this embodiment, the reflective member 22 is attached to the upper surface of the optical member 23 using a transparent double-sided tape (not shown) having translucency. It may be affixed and fixed to. Further, the reflecting member 22 may be fixed to the optical member 23 or the substrate 20 by a method other than sticking with a double-sided tape.

  As shown in FIGS. 5 to 8, the optical member 23 includes a plurality of (in the illustrated example, 64) lenses 230 and a coupling portion 231 that couples the plurality of lenses 230. Acrylic resin) is integrally formed.

  The lens 230 is provided corresponding to each of the plurality of LEDs 21, and distributes irradiation light from the corresponding LEDs 21 to a desired region. As shown in FIG. 7, the lens 230 is formed in a paraboloid shape, an incident surface 2300 on which light emitted from the LED 21 is incident, a propagation unit 2301 that propagates light incident from the incident surface 2300, and a propagation And an exit surface 2302 from which light propagated through the portion 2301 exits. The emission surface 2302 is formed in a curved surface in which the periphery of the center point (intersection with the optical axis) is recessed toward the LED 21 and the periphery protrudes in a direction away from the LED 21 (upward in FIG. 7). The propagation part 2301 is a region (resin molded body) surrounded by the incident surface 2300 and the exit surface 2302.

  On the surface of the optical member 23 on the substrate 20 side, as shown in FIG. 6B and FIG. 7, a recess 2303 that is recessed in a round hole shape around the opening end of the incident surface 2300 is provided. The recess 2303 is provided so that the center axis of the rotary paraboloid constituting the exit surface 2302 coincides. The bottom surface of the recess 2303 is connected to the incident surface 2300, and the LED 21 is housed inside the recess 2303 in a state where the optical member 23 is disposed so as to overlap the upper surface of the reflection member 22. Here, the inner diameter dimension X1 of the recess 2303 is larger than the inner diameter dimension X2 of the opening of the incident surface 2300 and smaller than the outer diameter dimension X3 of the exit surface 2302 (X2 <X1 <X3).

  Since the recess 2303 is formed such that the depth dimension is equal to or greater than the height dimension of the LED 21, it is difficult to hit the LED 21 even if the optical member 23 is thermally expanded. The recess 2303 is formed to have an inner diameter dimension that does not overlap with the land to which the electrode of the LED 21 is solder-joined when viewed from the depth direction (vertical direction). Therefore, of the light emitted from the LED 21, the light incident on the bottom surface of the recess 2303 can be controlled by the lens 230.

  However, the intensity of light entering the bottom surface of the recess 2303 and exiting from the exit surface 2302 is relative to the intensity of light entering near the boundary of the entrance surface 2300 with the recess 2303 and exiting from the exit surface 2302. To be high. Therefore, a light streak may be seen around the lens 230. In order to suppress the generation of such light streaks, the bottom surface of the recess 2303 facing the substrate 20 is preferably formed as an inclined surface whose depth dimension increases as the distance from the LED 21 increases (see FIG. 7). If the bottom surface of the recess 2303 is an inclined surface, the light emitted from the LED 21 is less likely to be directly incident on the bottom surface of the recess 2303, and the generation of light streaks as described above can be suppressed. Furthermore, if the boundary portion between the incident surface 2300 and the recess 2303 is formed in a curved shape protruding toward the LED 21, the generation of light streaks can be further suppressed.

  Further, a step portion 234 for forming a gap with the reflecting member 22 is formed on the entire outer periphery of the optical member 23 on the surface of the optical member 23 on the reflecting member 22 side. In a state where the LED module 2 is assembled, a gap is formed between the step portion 234 and the reflecting member 22, and an electric wire connected to the substrate 20 is inserted into this gap. Therefore, it is not necessary to secure a space for wiring the wires on the outer periphery of the substrate 20, and the lighting fixture can be reduced in size. In addition, since the adjacent LED modules 2 can be installed closer to each other as compared with the case where a space for wiring an electric wire is provided between the adjacent LED modules 2, the downsizing of the lighting fixture on which the plurality of LED modules 2 are mounted and the light emission are possible. The uniformity of the surface can be improved.

  In addition, light is diffused over the entire surface (including the upper surface of the stepped portion 234) except for the recess 2303 in the present embodiment on the surface of the optical member 23 on the reflecting member 22 side, which is at least a region corresponding to the coupling portion 231. A minute concavo-convex shape is formed for this purpose. FIG. 6C is an enlarged perspective view of a main part when the optical member 23 is viewed from the back side, and an uneven shape for diffusing light is formed in the hatched region in the illustrated range.

  As described above, since the concavo-convex shape is formed on the upper surface of the optical member 23, when the light of the LED 21 is reflected inside the optical member 23 and enters the coupling portion 231, it is diffused by the concavo-convex shape formed in the coupling portion 231. Then, the light is reflected by the reflecting member 22 and emitted from the coupling portion 231 to the outside. Therefore, it is possible to suppress the amount of light emitted from the coupling portion 231 from being increased and the coupling portion 231 from appearing dark. In addition, since a minute uneven shape is formed on the surface of the step portion 234 facing the reflecting member 22, it is possible to suppress the step portion 234 from becoming bright and appearing as a streak and to prevent unevenness in brightness. it can.

  In the present embodiment, a fine uneven shape is transferred to the surface of the optical member 23 by applying a texture to the surface of the mold for resin-molding the optical member 23. As a method for applying a texture to the surface of the mold, there are a chemical process by etching, a polishing process for roughening the surface without a mirror finish, such as a sand blast process, and a knurling process.

  On the upper surface of the optical member 23, the reflecting member 22 is bonded and fixed using a double-sided tape. The optical member 23 to which the reflecting member 22 is bonded and fixed is attached to the mounting plate 30 together with the substrate 20 by screwing. In the optical member 23, four through holes 235 through which fixing screws are passed are formed at positions where the apexes of the square are formed. A through hole (not shown) is also formed in the substrate 20 and the reflection member 22 so as to be connected to the through hole 235 in a state of being superimposed on the optical member 23. Thus, the optical member 23 to which the reflecting member 22 is attached is overlapped on the substrate 20, and a through hole 235 provided in the optical member 23 and a through hole (not shown) provided in the substrate 20 and the reflecting member 22, respectively. Then, a fixing screw (not shown) is passed through and the fixing screw is screwed into the screw hole of the mounting plate 30. As a result, the substrate 20, the reflection member 22, and the optical member 23 are fixed to the mounting plate 30.

  Further, the optical member 23 has a concave groove 236 for avoiding interference with the receptacle connector 24 (connection portion) mounted on the substrate 20 so as to pass between the two lenses 230 from the outer peripheral edge of the optical member 23. Is formed. Holding claws 237 for holding an electric wire (not shown) connected to the receptacle connector 24 with the substrate 20 are formed on both end surfaces near the opening of the concave groove 236. The optical member 23 is formed by resin molding, and the lenses 230 on both sides of the concave groove 236 can be formed into a desired lens shape depending on the shape of a mold for forming a component shape such as the concave groove 236. It is gone. That is, the lens 230 on both sides of the concave groove 236 is formed such that a part of the surface 230a (the hatched range in FIG. 8) is different from the desired lens shape. Therefore, there is a possibility of unevenness in brightness due to the light emitted from the part 230a of the surface, but in this embodiment, the uneven part that diffuses light is also formed in the part 230a of the surface. Unevenness of brightness is suppressed. In the present embodiment, the surface roughness of the part 230 a of the surface is made larger than the surface roughness of the upper surface of the optical member 23 (the surface on the reflecting member 22 side), and the light transmitted through the lens 230 is reduced. Suppresses uneven brightness.

  In a state in which the LED module 2 is assembled, most of the light emitted from the LED 21 enters the propagation unit 2301 from the incident surface 2300 of the optical member 23, travels inside the propagation unit 2301, and exits 2302. Directly to the outside. Further, a part of the light emitted from the LED 21 enters the optical member 23 through the incident surface 2300 or the end surface of the recess 2303 and is refracted or reflected at the boundary surface between the optical member 23 and the outside. The light passes through the upper surface of the optical member 23 (the surface on the reflecting member 22 side) and enters the reflecting member 22. Since the upper surface of the optical member 23 (the surface on the reflecting member 22 side) has a concavo-convex shape on the entire surface excluding the recess 2303, the light diffused by the concavo-convex shape is incident on the reflecting member 22. The light that has entered the reflecting member 22 is reflected by the reflecting member 22, then enters the optical member 23 again, and is irradiated downward from the lower surface of the coupling portion 231.

  As described above, in the LED module 2 of the present embodiment, the optical member 23 is configured such that an uneven shape for diffusing light is provided in a portion corresponding to the coupling portion 231 on the surface of the optical member 23 on the reflecting member 22 side. ing. That is, in the LED module 2, the reflecting member 22 is disposed so as to be in contact with one surface of the substrate 20, and the optical member 23 is disposed so as to be in contact with the surface of the reflecting member 22 opposite to the substrate 20. The thickness dimension of the LED module 2 can be reduced as compared with the case where a gap is provided between the reflecting member 22 or between the reflecting member 22 and the optical member 23. Furthermore, since the surface of the optical member 23 on the reflecting member 22 side has a concavo-convex shape at a portion corresponding to the coupling portion 231, the light from the LED 21 is reflected inside the optical member 23 to the coupling portion 231. When incident, it is diffused in the uneven shape formed in the coupling portion 231 and is reflected by the reflecting member 22 and is emitted to the outside from the coupling portion 231, so that the brightness of the coupling portion 231 becomes bright and uneven brightness. Can be reduced. Therefore, it is possible to realize the LED module 2 that is reduced in size while reducing unevenness in brightness.

  In addition, since the recess 2303 is formed around the opening end of the incident surface 2300, the space for housing the LED 21 is a space obtained by combining the space inside the incident surface 2300 and the recess 2303. Therefore, compared to the case where the recess 2303 is not provided and the LED 21 is housed in the space inside the incident surface 2300, the space around the LED 21 is enlarged when the recess 2303 is provided. Temperature rise is suppressed. Therefore, while using a material having a relatively low heat-resistant temperature (for example, acrylic resin) as a material for forming the optical member 23, the current flowing through the LED 21 can be increased to increase the luminance.

  Next, the frame 5 that holds the light source unit 1 and the panel 6 and is attached to the instrument body 4 will be described.

  As shown in FIGS. 1, 2, and 9, the frame 5 includes a bottom wall 50 provided with a rectangular through hole 52 at the center, and a side wall 51 that protrudes upward from the periphery of the bottom wall 50. Further, an inner wall 53 is provided on the upper surface of the bottom wall 50 so as to protrude upward from a portion closer to the inside than the side wall 51 in parallel with the side wall 51. On the upper side of the bottom wall 50, the panel 6 and the light source unit 1 are placed so as to overlap each other in a region surrounded by the inner wall 53. The reflector 3 of the light source unit 1 is attached to the inner wall 53 of the frame 5 using a mounting bracket 35. The mounting bracket 35 is formed by bending a metal plate into an L shape. One end side of the mounting bracket 35 is screwed to the mounting plate 30 of the reflector 3, and the other end side of the mounting bracket 35 is screwed to the inner wall 53. By fixing the light source unit 1 to the frame 5, the light source unit 1 is fixed. A panel 6 is held between 1 and the frame 5.

  The frame 5 has a pair of inner walls 53 (frame portions) opposed to each other with the through-hole 52 interposed therebetween, and fixing springs (consisting of fixing springs 8A and 8B) for attaching the frame 5 to the instrument body 4 are provided in the front-rear direction. Two pieces are attached at intervals.

  The fixed springs 8A and 8B are each formed by bending a metal wire (for example, stainless steel) having a relatively high elastic coefficient.

  As shown in FIG. 3, the fixed spring 8 </ b> A generates a central portion 80 wound in a coil shape and an elastic force that extends from both ends of the central portion 80 to both sides so as to form a V shape and expands the distance between each other. And a pair of arm portions 81. At the tips of the pair of arms 81, hook-shaped engagements that are engaged with the peripheral edge of the hole 46 of the instrument body 4 by bending the tips outward at a predetermined distance from the central portion 80. A stop 82 is formed. The locking portion 82 is covered with a protective tube 84 made of synthetic rubber or synthetic resin in order to protect the surface of the instrument body 4.

  As shown in FIG. 4, the fixed spring 8 </ b> B is formed in substantially the same shape except for the arm portion 81. The arm portion 81 of the fixed spring 8B protrudes in the same direction as the locking portion 82 at a position where the distance from the central portion 80 is shorter than the locking portion 82, and is locked to the periphery of the hole 46 of the instrument body 4. A stepped portion 83 is formed.

  In the present embodiment, the central portion 80 of the fixed spring 8A not provided with the step portion 83 is attached to the left inner wall 53 via the coupling metal 54, and the central portion 80 of the fixed spring 8B provided with the step portion 83 is provided. It is attached to the right inner wall 53 via a connecting fitting 54.

  The panel 6 is formed in a rectangular flat plate shape with a synthetic resin (for example, acrylic resin) having translucency and mixed with a diffusing material. However, the vertical and horizontal dimensions of the panel 6 are configured to be larger than the vertical and horizontal dimensions of the through holes 52 and smaller than the distance between the inner walls 53. The panel 6 is housed inside the inner wall 53 and placed on a portion of the bottom wall 50 inside the inner wall 53 to close the through hole 52 (see FIGS. 1 and 2). The light source unit 1 is placed on the panel 6 placed on the bottom wall 50, and the reflector 6 of the light source unit 1 is fixed to the frame 5 using the mounting bracket 35, so that the panel 6 becomes a light source. It is held between the unit 1 and the frame 5.

  Each part of the lighting fixture of this embodiment has the above-described configuration, and a procedure for attaching the lighting fixture to the ceiling material 100 will be described with reference to FIGS. 9 to 12.

  The operator inserts the instrument main body 4 from below into the opening 101 of the ceiling material 100, and places the instrument main body 4 on the suspension bolt 102 with the upper surface of the outer casing 42 contacting the peripheral edge of the opening 101. Fix it. Inside the fixture body 4, power lines and signal lines previously wired on the back side of the ceiling material 100 are introduced through the through-holes 401, and the operator connects the power lines to the power terminal block 43, Connect the wire to the signal terminal block 44.

  The frame 5 to which the panel 6 and the light source unit 1 are attached is attached to the instrument body 4 attached to the ceiling material 100 in this way.

  The operator has the arm portions 81 of the two fixed springs 8B attached to the right side of the frame 5 and bends the arm portions 81 so that the distal ends of the pair of arm portions 81 included in each fixed spring 8B approach each other. The tip of the portion 81 is inserted into the hole 46 of the corresponding instrument body 4, and the locking portion 82 is hooked on the periphery of the hole 46. Thereby, the frame 5 is suspended from the instrument body 4 by the two fixing springs 8B attached to the right inner wall 53 (see FIG. 9). In addition, both end surfaces in the front-rear direction of the hole 46 are curved surfaces 47 curved in an arc shape, and the arm portion 81 generates an elastic force in a direction to open outward. The arm portion 81 is located at a portion where the opening width in the front-rear direction of the hole 46 is maximum.

  Next, the operator lifts the lower side of the frame 5 upward from the state shown in FIG. 9 and attaches the two fixing springs 8A attached to the left side of the frame 5 (lower side in FIG. 9) to the corresponding instrument body. The four holes 46 are locked in order. The operator bends the pair of arm portions 81 included in each fixing spring 8 </ b> A toward each other, inserts the tip of the arm portion 81 into the left hole 46 of the instrument body 4, and sets the locking portion 82 to the periphery of the hole 46. Hang on. As a result, the frame 5 is suspended by the fixing springs 8A and 8B on both sides (see FIG. 10).

  When the operator pushes up the frame 5 upward from this state, the pair of arm portions 81 provided in the fixing springs 8A and 8B are spread outward by the elastic force, and the frame 5 is applied by the spring force of the fixing springs 8A and 8B. Is raised upward. And the upper end of the side wall 51 will contact | abut with the lower surface of the ceiling material 100, and the frame 5 will be in the state attached to the lower surface of the ceiling material 100 (refer FIG. 11).

  The lighting fixture of this embodiment is attached to the ceiling material 100 in the above procedures. Next, the operation | work which removes the frame 5 from the state with which the lighting fixture was attached to the ceiling material 100 is demonstrated.

  When the operator pulls the frame 5 downward against the spring force of the fixing springs 8A and 8B, the pair of arm portions 81 provided in the fixing springs 8A and 8B are bent so that their tips approach each other. Accordingly, the frame 5 is pulled down (see FIGS. 12 and 13). Since the fixed spring 8A is not provided with the step portion 83, the left side of the frame 5 supported by the two fixed springs 8A is lowered to a position where the locking portion 82 of the fixed spring 8A is caught by the peripheral edge of the hole 46. . On the other hand, the right side of the frame 5 supported by the two fixing springs 8 </ b> B stops at a position where the step portion 83 of the fixing spring 8 </ b> B is caught by the peripheral edge of the hole 46.

  Here, since the distance from the center part 80 to the step part 83 is set to be shorter than the distance from the center part 80 to the locking part 82, the side of the frame 5 supported by the fixing spring 8A is It is in a state of being inclined so as to be on the lower side. In this state, the gap between the right side portion (left side portion in FIG. 12) of the frame 5 supported by the fixing spring 8B and the instrument body 4 is so narrow that a finger of an adult hand cannot enter. In addition, a distance from the central portion 80 to the step portion 83 is set. Therefore, the operator cannot bend the pair of arm portions 81 included in the fixed spring 8B, but bends the pair of arm portions 81 included in the fixed spring 8A so as to open the locking portion 82 of the fixed spring 8A. 46 is removed from the peripheral edge. When the locking portions 82 of the two fixing springs 8A are removed from the peripheral edges of the holes 46, the frame 5 is suspended from the instrument body 4 by the two fixing springs 8B. Thus, maintenance work such as replacement of the light source unit 1 can be performed.

  Here, the lighting device 7 is attached to the reflector 3 so that the input terminal block 71 and the signal terminal block 73 are close to the inner wall 53 (frame portion) supported by the fixing spring 8B. The length of the electric wire connecting between the terminal blocks 43 and 44 attached to 4 and the terminal blocks 71 and 73 can be shortened. As a result, since the extra length of the electric wire is shortened, the possibility that the extra length of the electric wire is caught between the instrument main body 4 and the frame 5 when the frame 5 is attached to the instrument main body 4 can be reduced. .

  9, when the frame 5 is completely removed from the instrument main body 4 while the frame 5 is suspended from the instrument main body 4, the operator can move between the terminal blocks 43 and 44 and the terminal blocks 71 and 73. After removing the electric wires, the arm portions 81 of the two fixing springs 8B may be bent to remove the arm portions 81 from the holes 46.

  When reattaching the frame 5 to the instrument main body 4 from the suspended state shown in FIG. 9, the operator lifts the lower side of the frame 5 upward as described above and attaches the two fixing springs 8A to the corresponding instrument main body. The four holes 46 are locked in order. Thereafter, when the operator pushes up the frame 5 upward, the pair of arm portions 81 provided in each of the fixing springs 8A and 8B expands outward due to the elastic force thereof, and the spring force of the fixing springs 8A and 8B 5 is pulled up. And the upper end of the side wall 51 will contact | abut with the lower surface of the ceiling material 100, and the frame 5 will be in the state attached to the lower surface of the ceiling material 100 (refer FIG. 11).

  As described above, the lighting fixture of this embodiment includes the fixture body 4, the light source unit 1, the frame 5, and the translucent panel 6. The instrument body 4 is formed in a box shape with an open bottom surface and is installed in a state of being embedded in an opening 101 provided in the ceiling material 100. The light source unit 1 is housed inside the instrument body 4. The frame 5 is provided with a through-hole 52 so as to be connected to the opening of the instrument main body 4, and is attached to the instrument main body 4 with the upper surface in contact with the peripheral edge of the opening 101 in the ceiling material 100. The panel 6 is held by the frame 5 so as to close the through hole 52. The frame 5 is attached to the instrument body 4 by using fixing springs 8A and 8B attached to a pair of frame portions (in this embodiment, the inner wall 53) facing each other with the through hole 52 interposed therebetween. The fixing springs 8A and 8B include a central portion 80 attached to the frame portion, and a pair of arm portions that generate elastic forces that extend from both ends of the central portion 80 so as to form a V-shape and expand the distance therebetween. 81. The instrument body 4 is provided with a hole 46 into which the arm portion 81 is inserted corresponding to the fixing springs 8A and 8B attached to the pair of frame portions. A hook-shaped locking portion 82 that locks with the periphery of the hole 46 is provided at a position that is a predetermined distance from the hole 46. On the arm portion 81 of the fixed spring 8B attached to one of the pair of frame portions, a step portion 83 that engages with the periphery of the hole 46 at a position that is shorter than the engagement portion 82 by a distance from the central portion 80. Is provided.

  Of the pair of frame portions to which the fixing springs 8A and 8B are attached when the frame 5 is lowered, the step portion 83 has a hole 46 in one of the frame portions to which the fixing spring 8B having the step portion 83 is attached. Since it stops in the position latched to the periphery of the other, compared with the said other frame part, the clearance gap between the instrument main bodies 4 is small, and it becomes difficult to put a hand in this clearance gap. Therefore, it is difficult to remove the arm portion 81 of the fixed spring 8B having the step portion 83 from the hole 46 of the instrument main body 4, and the operator attaches the arm portion 81 of the fixed spring 8A having no step portion 83 to the instrument. The main body 4 is removed from the hole 46. Therefore, the fixing spring 8A on one side (fixing spring 8A on which the step portion 83 is not provided) makes it difficult to temporarily suspend the frame 5, and the fixing spring 8B on the opposite side (fixing spring 8B on which the step portion 83 is provided). Thus, it is possible to provide a lighting fixture in which the frame 5 is temporarily suspended.

  In the lighting fixture of this embodiment, it is also preferable to further include the following configuration. The light source unit 1 is held by the frame 5, and on the inner surface of the instrument body 4, an electric wire from an external power source and the light source unit are provided on the side close to the frame portion (inner wall 53) to which a fixing spring 8B having a step portion 83 is attached A terminal block (power supply terminal block 43) that relays and connects the wires from 1 is attached. And it is preferable that the light source unit 1 is comprised so that the electric wire connected to the said terminal block may be pulled out from the side near the said frame part to which the fixed spring 8B which has the step part 83 was attached.

  Thereby, since the length of the electric wire which connects between the light source unit 1 and the said terminal block can be shortened and the extra length of this electric wire becomes short, this electric wire may be pinched | interposed between a frame and an instrument main body. Can be reduced.

  In the lighting fixture of this embodiment, it is also preferable to further include the following configuration. The light source unit 1 includes a lighting device 7 that turns on a light source (LED 21) by converting electric power supplied from an external power source via an electric wire connected to a terminal block (power supply terminal block 43). The lighting device 7 is connected to the light source unit 1 so that the connection portion (input terminal block 71) of the electric wire is arranged on the side close to the frame portion (inner wall) to which the fixing spring 8B having the step portion 83 is attached. It is also preferred that it be attached.

  Thereby, since the length of the electric wire which connects between the connection part of the lighting device 7 and the said terminal block can be shortened, and the extra length of this electric wire becomes short, this electric wire is pinched | interposed between a frame and the instrument main body. The possibility of being lost can be reduced.

DESCRIPTION OF SYMBOLS 1 Light source unit 4 Instrument main body 5 Frame 6 Panel 7 Lighting device 8A, 8B Fixing spring 43 Power supply terminal block (terminal block)
44 Signal terminal block (terminal block)
46 hole 52 through hole 53 inner wall (frame part)
71 Input terminal block (connection part)
80 Central part 81 Arm part 82 Locking part 83 Step part 100 Ceiling material 101 Opening part

Claims (3)

An instrument body that is formed in a box shape having an open bottom surface and is embedded in an opening provided in a ceiling material;
A light source unit housed inside the instrument body;
A through hole is provided so as to be connected to the opening of the instrument body, and a frame attached to the instrument body in a state in which an upper surface is in contact with a peripheral edge of the opening in the ceiling material;
A translucent panel held by the frame so as to close the through-hole,
The frame is attached to the instrument body using a fixing spring attached to each of a pair of frame parts facing each other across the through hole,
The fixing spring includes a central portion attached to the frame portion, and a pair of arm portions that extend from both ends of the central portion to both sides so as to form a V shape and generate an elastic force that increases the distance between the two. ,
The instrument body is provided with a hole into which the arm portion is inserted, corresponding to the fixing spring attached to each of the pair of frame portions,
At the tip of the arm portion, a hook-shaped locking portion that locks with the peripheral edge of the hole is provided at a position away from the central portion by a predetermined distance,
The arm portion of the fixed spring attached to one of the pair of frame portions has a stepped portion that engages with the periphery of the hole at a position where the distance from the central portion is shorter than the engaging portion. A luminaire characterized by being provided. The light source unit is held by the frame;
On the inner surface of the instrument body, a terminal block that relays and connects an electric wire from an external power source and an electric wire from the light source unit is attached to the side near the frame portion to which the fixing spring having the step portion is attached.
The said light source unit is comprised so that the electric wire connected to the said terminal block may be pulled out from the side near the said frame part to which the said fixed spring which has the said step part was attached. lighting equipment. The light source unit includes a lighting device that turns on a light source by converting electric power supplied from the external power source through an electric wire connected to the terminal block,
The lighting device is attached to the light source unit so that a connection portion of the electric wire is disposed on a side close to the frame portion to which the fixing spring having the step portion is attached. The luminaire described.

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