JP2014179209A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture in which heat radiation efficiency of heat generating in a light emitting element to a fixture body is enhanced.SOLUTION: A fixture body 1 has a recess 11 for accommodating at least one part of a light source unit 2 on the opposite side from a ceiling material 100. The light source unit 2 includes: a substrate 22 on which a plurality of LEDs 222 are mounted; and a mounting member 21 for mounting the substrate 22 on the fixture body 1 so that the plurality of LEDs 222 face the opposite side from the fixture body 1. The mounting member 21 is formed by: a bottom surface part 211 for supporting the substrate 22; and a first side surface part 212 and a second side surface part 213 extending in a direction orthogonal to the bottom surface part 211 from both ends in the width direction of the bottom surface part 211. Then, in a state where the light source unit 2 is mounted on the fixture body 1, a contact part 212b of the first side surface part 212 comes into surface contact with one side surface part 112 of the recess 11, and a contact part 213b of the second side surface part 213 comes into surface contact with the other side surface part 112 of the recess 11.

Description

  The present invention relates to a lighting fixture.

  2. Description of the Related Art Conventionally, a ceiling-mounted lighting fixture that is attached to a ceiling has been provided (see, for example, Patent Document 1). This lighting fixture includes a fixture main body that is directly attached to the ceiling using a suspension bolt or the like, an LED unit that is detachably attached to the fixture main body, and a holder for attaching the LED unit to the fixture main body.

  The appliance body is formed in a long and rectangular box shape, and a recess for accommodating the LED unit is provided over the entire length on the lower surface side. The holder is formed in a U-shape with a long and rectangular plate-shaped support portion and a pair of flexible portions extending in a direction intersecting the support portion from both ends in the width direction of the support portion. A locking piece is integrally provided at the tip of the flexible portion.

  The LED unit covers a plurality of LEDs, a long bracket formed in a U shape in a side view, a substrate on which a plurality of LEDs are mounted along the longitudinal direction and attached to the lower surface of the bracket. And a cover attached to the bracket. On both side surfaces in the width direction of the bracket, a pair of locking grooves with which the respective locking pieces are engaged are provided.

  Then, the LED unit assembled integrally is accommodated in the recess of the instrument body from the bracket side, and each locking piece of the holder is engaged with the corresponding locking groove of the bracket, so that the LED unit becomes the instrument body. Attached to.

JP 2011-142063 A

  In the lighting fixture shown in Patent Document 1 described above, the fixture main body, the holder, and the bracket are made of metal, and when the LED unit is attached to the fixture main body, the fixture main body and the bracket are thermally coupled via the holder. . Therefore, the heat generated by the LED can be radiated to the instrument body via the bracket and the holder. However, the bracket and the holder are in contact with only the engaging portion of the locking piece and the locking groove, and therefore the heat dissipation efficiency to the instrument body is not good.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a lighting fixture having improved heat dissipation efficiency of the heat generated by the light emitting element to the fixture body.

  The lighting fixture of the present invention includes a fixture body that is attached to the construction material and a light source unit that is detachably attached to the fixture body, and the fixture body accommodates at least a part of the light source unit on the side opposite to the construction material. The light source unit includes a substrate on which a plurality of light emitting elements are mounted, and an attachment member for attaching the substrate to the instrument body so that the plurality of light emitting elements face away from the instrument body. The mounting member includes a bottom surface portion that supports the substrate, and a first side surface portion and a second side surface portion that extend from both ends in the width direction of the bottom surface portion in a direction intersecting the bottom surface portion. At least one of the portion and the second side surface portion has a contact portion that makes surface contact with the inner surface of the recess in a state where the light source unit is attached to the instrument body.

  In this lighting fixture, the light source unit is attached to the fixture main body by rotating the second side surface side about the first side surface side in the width direction, and the first side surface portion has a contact portion. The second side surface portion preferably rotates in a state where a gap is left between the second side surface portion and the inner side surface of the recess when the light source unit is attached to or detached from the instrument body.

  Further, in this lighting fixture, the light source unit is attached to the fixture main body by rotating the second side surface side about the first side surface portion side in the width direction, and the first side surface portion and the second side surface portion Each has a contact portion, and the contact portion of the second side surface portion is preferably made of an elastic body protruding in an arc shape on the side opposite to the first side surface portion in the width direction.

  According to the configuration of the present invention, when the light source unit is attached to the instrument body, the contact portion is in surface contact with the instrument body, and the contact area between the attachment member and the instrument body can be increased. There is an effect that the heat radiation efficiency of the heat to the instrument body can be increased.

It is sectional drawing of the lighting fixture of Embodiment 1. FIG. It is an exploded perspective view same as the above. It is an external appearance perspective view same as the above. It is the perspective view which represented typically the light source unit used for the same as the above. It is sectional drawing of the lighting fixture of Embodiment 2. FIG. It is the perspective view which represented typically the light source unit used for the same as the above. It is sectional drawing of the lighting fixture of Embodiment 3. FIG. It is the perspective view which represented typically the light source unit used for the same as the above. It is the perspective view which represented typically another light source unit used for the same as the above.

  Hereinafter, an embodiment of a lighting apparatus will be described with reference to the drawings.

(Embodiment 1)
The lighting fixture A of the present embodiment is a ceiling-mounted lighting fixture as shown in FIG. 1, and a fixture main body 1 attached to a ceiling material 100 (building material) using a suspension bolt (not shown); A light source unit 2 detachably attached to the instrument body 1. In the following description, unless otherwise specified, the vertical and horizontal directions are defined in the orientation shown in FIG. 1, and the direction perpendicular to the paper surface in FIG. 1 is defined as the front-rear direction (the front side is the front side). Do.

  The instrument body 1 is formed into a flat box shape that is long and has an upper surface (a surface facing the ceiling material 100) opened by bending a sheet metal, and a light source on the opposite side (lower side) of the ceiling material 100 A rectangular recess 11 for accommodating the unit 2 is provided over the entire length (see FIG. 2). In addition, on both sides of the recess 11 in the left-right direction (width direction) of the instrument body 1, there are inclined surfaces 12, 12 that extend from the opening edge of the recess 11 and incline upward (toward the ceiling material 100) toward the outside. Each is provided (see FIG. 1).

  In addition, a plurality of holes (5 in FIG. 2) are provided in the bottom surface portion 111 of the recess 11 along the front-rear direction (longitudinal direction) for passing an electric wire, and further, holes 111b for passing a suspension bolt are provided in the front-rear direction. Two are provided near both ends in the direction. Further, a terminal block (not shown) is attached to the bottom surface portion 111 of the recess 11, and the terminal block and a power supply device 24 described later are connected by an electric wire.

  The light source unit 2 includes a plurality of (two in FIG. 2) substrates 22, an attachment member 21 to which the substrates 22 are attached, and a cover member 23 that is attached to the attachment members 21 so as to cover the substrate 22. The light source unit 2 includes a power supply device 24 that supplies predetermined lighting power to the substrate 22 and an attachment spring 25 (see FIG. 4) for attaching the light source unit 2 to the instrument body 1.

  The substrate 22 includes a printed board 221 formed in a rectangular plate shape that is long in the front-rear direction, and a plurality of LEDs 222 (light emitting elements) are mounted on the lower surface of the printed board 221 along the front-rear direction (longitudinal direction). Further, a connector 223 for electrically connecting the power supply device 24 is mounted on the front end portion (right end portion in FIG. 2) of one (right side in FIG. 2) substrate 22. An electric wire (not shown) is connected to the connector 223. By connecting the end of the electric wire to the power supply device 24, the substrate 22 and the power supply device 24 are electrically connected.

  Further, a power supply connector 224 is mounted on an end portion of each substrate 22 facing the adjacent substrate 22. Then, by connecting the connectors 224 and 224 of the boards 22 and 22, lighting power can be supplied from the board 22 on one side (right side in FIG. 2) to the board 22 on the other side (left side in FIG. 2). .

  The mounting member 21 is formed in a U shape by bending a sheet metal, and is formed in a long and rectangular plate shape, and upward from both ends in the left-right direction (width direction) of the bottom surface portion 211. The first side surface portion 212 and the second side surface portion 213 extend.

  A protruding portion 212a that protrudes to the side (right side in FIG. 1) is provided at the tip of the first side surface portion 212 over the entire length, and further, a contact portion 212b that extends upward at the tip of the protruding portion 212a. Is provided over the entire length (see FIGS. 1 and 4). Further, a protrusion 213a that protrudes to the side (left side in FIG. 1) is provided over the entire length at the tip of the second side surface 213, and further, the tip of the protrusion 213a is in contact with the upward extension. The part 213b is provided over the entire length (see FIGS. 1 and 4).

  A hole 211a is formed in the front end portion (right end portion in FIG. 2) of the bottom surface portion 211 for passing the electric wire that electrically connects the substrate 22 and the power supply device 24. In addition, a rectangular concave portion 211b formed by protruding a part of the bottom surface portion 211 upward is provided at a central portion of the bottom surface portion 211 in the front-rear direction. The recess 211 b is for securing an insulation distance between the connector 224 and the bottom surface portion 211 of the mounting member 21 in a state where both the boards 22 and 22 are mounted on the mounting member 21.

  In addition, attachment springs 25 are attached in the vicinity of the four corners of the attachment member 21, and the attachment springs 25 corresponding to the respective locking portions (not shown) provided in the vicinity of the four corners of the recess 11 of the instrument body 1 are provided. The light source unit 2 is attached to the instrument main body 1 by engaging with each other. In addition, the board | substrate 22 mentioned above is fixed to the attachment member 21 by the latching claw (not shown) formed, for example by cutting and raising a part of the bottom face part 211 of the attachment member 21. FIG.

  The cover member 23 is formed in a long shape whose upper surface (surface on the mounting member 21 side) is opened by a diffusible material (for example, milky white acrylic resin). Moreover, the cover member 23 has a diffusing surface 231 having a convex lens shape such that a protruding amount increases downward from the both end sides toward the center side in the left-right direction (width direction) (see FIG. 1). Further, at both ends in the left-right direction of the cover member 23, as shown in FIG. 1, the light source unit 2 is attached to the instrument main body 1, and the cover member 23 overlaps with the opening edge of the recess 11 of the instrument main body 1 in the vertical direction. Outlets 232 are respectively provided.

  In addition, a first leg portion 233 and a second leg portion 234 that extend upward (on the attachment member 21 side) are provided on the inner sides of the extending portions 232 in the left-right direction of the cover member 23, respectively. Yes. Further, a hook portion 233a extending to the side (right side in FIG. 1) is provided at the tip of the first leg 233, and the side (left side in FIG. 1) is provided at the tip of the second leg 234. ) Is provided with a hooking portion 234a.

  The power supply device 24 includes a power supply board 241 and a storage case 242 for storing the power supply board 241. The power supply board 241 includes a printed board 241a formed in a rectangular plate shape that is long in the front-rear direction. The printed board 241a includes electronic components (for example, a transformer, a diode, a capacitor, etc.) 241b for generating at least the lighting power of the LED 222. Has been implemented.

  As shown in FIG. 2, the storage case 242 is formed in a rectangular box shape with one surface (a surface facing the bottom surface portion 211 of the mounting member 21) open and long in the front-rear direction. The storage case 242 is attached to the bottom surface portion 211 of the attachment member 21 using, for example, screws, such that the opening side faces the bottom surface portion 211 of the attachment member 21.

  Next, the assembly procedure of the light source unit 2 will be described. First, the operator fixes the power supply device 24 to the upper surface of the bottom surface portion 211 of the mounting member 21, and further fixes the two substrates 22, 22 to the lower surface of the bottom surface portion 211 of the mounting member 21 by the locking claws. To do. Thereafter, the operator passes the electric wire led out from the connector 223 of the board 22 through the hole 211 a provided in the bottom surface portion 211 of the mounting member 21, and connects the end portion to the power supply device 24.

  Finally, the operator attaches the cover member 23 to the attachment member 21 with the opening side facing upward. At this time, the hook portion 233a of the first leg portion 233 engages with the protrusion portion 212a of the first side surface portion 212, and the hook portion 234a of the second leg portion 234 engages with the protrusion portion 213a of the second side surface portion 213. . The light source unit 2 is assembled by the above procedure.

  Then, the construction procedure of the lighting fixture A is demonstrated. In the following description, it is assumed that the terminal block is attached to the instrument body 1 in advance. First, the operator passes a power line (not shown) wired in advance on the back of the ceiling through the hole 111a of the instrument body 1, and further places a suspension bolt (not shown) exposed from the ceiling material 100 into the hole 111b. After passing, a nut (not shown) is screwed to fix the instrument body 1 to the ceiling material 100.

  Thereafter, the operator connects the end of the power supply line to the terminal block, and further connects the terminal block and the power supply device 24 with an electric wire. Finally, when the operator assembles the light source unit 2 in the fixture main body 1 so that the power supply device 24 is accommodated in the recess 11 of the fixture main body 1, the construction of the lighting fixture A is completed (FIGS. 1 and FIG. 1). 3). At this time, each attachment spring 25 of the light source unit 2 engages with a corresponding locking portion (not shown) of the instrument body 1, and the light source unit 2 is attached to the instrument body 1.

  Here, in the conventional lighting fixture, the heat generated by the LED is radiated to the fixture main body via the bracket and the holder, but the bracket and the holder are in contact with the locking piece and the locking groove. Therefore, the heat dissipation efficiency to the instrument body was not good.

  Therefore, in the present embodiment, as shown in FIG. 1, the contact portion 212 b of the first side surface portion 212 and the contact portion 213 b of the second side surface portion 213 are arranged in the recess 11 in a state where the light source unit 2 is attached to the instrument body 1. The corresponding side portions 112 (inner side surfaces) are brought into surface contact with each other. Thus, by making the attachment member 21 and the instrument main body 1 in surface contact, the heat radiation area from the attachment member 21 to the instrument main body 1 can be increased, and thereby the heat dissipation efficiency to the instrument main body 1 can be increased. . And by raising the thermal radiation efficiency to the fixture main body 1, the temperature rise of LED222 can be suppressed and the lighting fixture A with sufficient luminous efficiency can be provided.

  In the present embodiment, the contact portions are provided on both the first side surface portion 212 and the second side surface portion 213, but the contact portion may be provided on at least one of the first side surface portion 212 or the second side surface portion 213. That's fine. Moreover, in this embodiment, although the contact part 212b of the 1st side part 212 and the contact part 213b of the 2nd side part 213 were provided over the full length, respectively, the surface contact is made to the side part 112 of the recessed part 11. If so, it may not be provided over the entire length.

(Embodiment 2)
Embodiment 2 of the lighting fixture A will be described with reference to FIGS. 5 and 6. In the following description, unless otherwise specified, the vertical and horizontal directions are defined in the orientation shown in FIG. 5, and the direction perpendicular to the paper surface in FIG. 5 is defined as the front-rear direction (the front side is the front side). Do. Moreover, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As illustrated in FIG. 5, the lighting fixture A of the present embodiment is a ceiling-mounted lighting fixture, and includes a fixture main body 1 and a light source unit 2. The light source unit 2 includes a substrate 22, an attachment member 21, a cover member 23, a power supply device 24, and an attachment spring 25.

  The mounting member 21 is formed in a U shape by bending a sheet metal, and is formed in a long and rectangular plate shape, and upward from both ends in the left-right direction (width direction) of the bottom surface portion 211. The first side surface portion 212 and the second side surface portion 213 extend.

  A protrusion 212a that protrudes laterally (on the right side in FIG. 5) is provided at the front end of the first side surface 212, and the contact 212b that extends upward is provided at the front end of the protrusion 212a. Is provided over the entire length (see FIGS. 5 and 6). Further, a pair of hook pieces 212c extending to the side (left side in FIG. 5) near both ends in the front-rear direction (longitudinal direction) of the first side surface portion 212 cuts a part of the contact portion 212b. Is provided. Furthermore, a protrusion 213a protruding to the side (left side in FIG. 5) is provided at the tip of the second side surface portion 213 over the entire length.

  Two side holes 112 (on the left side in FIG. 5) of the recess 11 of the instrument main body 1 have two hook holes (not shown) through which the hook pieces 212c are hooked when the light source unit 2 is attached to the instrument main body 1, respectively. ) Are provided along the front-rear direction. Then, after hooking each hook piece 212c in the corresponding hook hole, the light source unit 2 is rotated about the hook piece 212c side as a rotation center, and each mounting spring 25 is moved to the corresponding locking portion (not shown). By engaging, the light source unit 2 is attached to the instrument main body 1.

  At this time, no contact portion is provided on the rotating side of the light source unit 2, that is, the second side surface portion 213, so that the second side surface portion 213 has a gap between the side surface portion 112 of the recess 11. It rotates in the state where it is in contact with the side surface portion 112. Thereby, the light source unit 2 can be easily attached to and detached from the instrument main body 1.

  In the state where the light source unit 2 is attached to the instrument body 1, the contact portion 212 b of the first side surface portion 212 is in surface contact with the side surface portion 112 of the recess 11, thereby increasing the heat radiation area to the instrument body 1. be able to. And by increasing the heat dissipation area to the fixture main body 1, the heat dissipation efficiency to the fixture main body 1 can be increased, thereby suppressing the temperature rise of the LED 222, and providing the lighting fixture A with high luminous efficiency. can do.

(Embodiment 3)
Embodiment 3 of the lighting fixture A will be described with reference to FIGS. In the following description, unless otherwise specified, the vertical and horizontal directions are defined in the direction shown in FIG. 7, and the direction perpendicular to the paper surface in FIG. 7 is defined as the front-rear direction (the front side is the front side). Do. Moreover, about the structure similar to Embodiment 1, 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 7, the lighting fixture A of the present embodiment is a ceiling-mounted lighting fixture, and includes a fixture main body 1 and a light source unit 2. The light source unit 2 includes a substrate 22, an attachment member 21, a cover member 23, a power supply device 24, and an attachment spring 25.

  The mounting member 21 is formed in a U shape by bending a sheet metal, and is formed in a long and rectangular plate shape, and upward from both ends in the left-right direction (width direction) of the bottom surface portion 211. The first side surface portion 212 and the second side surface portion 213 extend.

  A protrusion 212a that protrudes to the side (right side in FIG. 7) is provided over the entire length at the tip of the first side surface 212, and a contact part 212b that extends upward is provided at the tip of the protrusion 212a. Is provided over the entire length (see FIGS. 7 and 8). Further, a pair of hook pieces 212c extending to the side (left side in FIG. 7) near both ends in the front-rear direction (longitudinal direction) of the first side surface portion 212 cuts a part of the contact portion 212b. Is provided.

  Further, a protrusion 213a that protrudes to the side (left side in FIG. 7) is provided over the entire length at the tip of the second side surface part 213, and a contact part 213b is provided at the tip of the protrusion 213a. It is provided over. As shown in FIGS. 7 and 8, the contact portion 213b is made of an elastic body protruding in an arc shape on the opposite side (right side in FIG. 7) to the first side surface portion 212 in the left-right direction (width direction). Deforms elastically in the direction.

  Therefore, when the light source unit 2 is attached to the instrument main body 1, the contact portion 213 b of the second side surface portion 213 contacts the side surface portion 112 of the recess 11, but elastically deforms in the left-right direction. The light source unit 2 can be easily attached and detached.

  In the state where the light source unit 2 is attached to the instrument body 1, the contact portion 212 b of the first side surface portion 212 and the contact portion 213 b of the second side surface portion 213 are brought into surface contact with the corresponding side surface portion 112 of the recess 11. . Thus, by making the attachment member 21 and the instrument main body 1 in surface contact, the heat radiation area from the attachment member 21 to the instrument main body 1 can be increased, and thereby the heat dissipation efficiency to the instrument main body 1 can be increased. . And by raising the thermal radiation efficiency to the fixture main body 1, the temperature rise of LED222 can be suppressed and the lighting fixture A with sufficient luminous efficiency can be provided.

  FIG. 9 is a schematic perspective view showing another light source unit 2 of the present embodiment. In this example, the contact portion 212b of the first side surface portion 212 is configured by an elastic body that protrudes in an arc shape on the opposite side to the second side surface portion 213, and the contact portion 213b of the second side surface portion 213 is further configured as the first side surface portion. It is made of an elastic body protruding in an arc shape on the opposite side to 212. The contact portions 212b and 213b are set to be longer than the storage case 242 of the power supply device 24, and are provided at positions corresponding to the storage case 242.

  When the light source unit 2 is attached to the instrument body 1, the contact portion 212 b of the first side surface portion 212 is elastically contacted with the left side surface portion 112 of the recess 11, and the contact portion 213 b of the second side surface portion 213 is It is in elastic contact with the right side surface portion 112. Thereby, the adhesiveness of the attachment member 21 and the instrument main body 1 can be improved, As a result, the thermal radiation efficiency to the instrument main body 1 can be improved. And by raising the thermal radiation efficiency to the fixture main body 1, the temperature rise of LED222 can be suppressed and the lighting fixture A with sufficient luminous efficiency can be provided.

  Further, the power supply device 24 is also a heat source, and when the contact portions 212b and 213b are provided over the entire length of the attachment member 21, the temperature of the LED 222 disposed in the vicinity of the power supply device 24 is separated from the power supply device 24. It becomes higher than LED222 arrange | positioned in a position. This temperature difference causes uneven brightness between the LEDs 222.

  On the other hand, in this example, the contact portions 212b and 213b are provided only at positions corresponding to the power supply device 24, whereby the temperature difference between the LEDs 222 can be suppressed to be small, and as a result, the luminance unevenness between the LEDs 222 is reduced. Can be kept small.

DESCRIPTION OF SYMBOLS 1 Instrument body 2 Light source unit 11 Recessed part 21 Mounting member 22 Board | substrate 100 Ceiling material (construction material)
112 Side (inner side)
211 Bottom surface portion 212 First side surface portion 212b Contact portion 213 Second side surface portion 213b Contact portion 222 LED (light emitting element)

Claims (3)

An instrument body attached to the construction material, and a light source unit detachably attached to the instrument body,
The instrument body has a recess for accommodating at least a part of the light source unit on the side opposite to the construction material,
The light source unit includes a substrate on which a plurality of light emitting elements are mounted, and an attachment member for attaching the substrate to the instrument body so that the plurality of light emitting elements face the opposite side of the instrument body,
The mounting member is formed of a bottom surface portion that supports the substrate, and a first side surface portion and a second side surface portion that extend in a direction intersecting the bottom surface portion from both ends in the width direction of the bottom surface portion,
At least one of the first side surface portion or the second side surface portion has a contact portion that makes surface contact with an inner surface of the recess in a state where the light source unit is attached to the device main body. The light source unit is attached to the instrument body by rotating the second side surface side with the first side surface side as a rotation center in the width direction,
The first side surface portion has the contact portion,
2. The illumination according to claim 1, wherein the second side surface portion rotates with a gap between the second side surface portion and the inner side surface of the recess when the light source unit is attached to or detached from the instrument body. Instruments. The light source unit is attached to the instrument body by rotating the second side surface side with the first side surface side as a rotation center in the width direction,
The first side surface portion and the second side surface portion each have the contact portion,
The lighting device according to claim 1, wherein the contact portion of the second side surface portion is made of an elastic body that protrudes in an arc shape on the side opposite to the first side surface portion in the width direction.

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