JP2016029671A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To store a power supply device in a housing body and prevent the power supply device from being heated to high temperature.SOLUTION: A lighting device according to one embodiment includes: a substrate; a housing; and a power supply device. In the substrate, light emitting elements are mounted on one surface. The housing includes: an installation surface on which the other surface of the substrate is installed; and a storage part which is formed so that its longitudinal direction is arranged substantially parallel to the installation surface and at least part thereof is formed at a position that does not overlap with the substrate. The power supply device is disposed in the storage part of the housing and supplies electric power to the substrate installed on the installation surface of the housing.SELECTED DRAWING: Figure 3

Description

  Embodiments described herein relate generally to a lighting device.

  2. Description of the Related Art Conventionally, downlights embedded in a ceiling or the like have been used as lighting fixtures that use semiconductor light emitting elements such as LEDs (Light Emitting Diodes) as light sources. Such a lighting fixture includes a light source board on which an LED is mounted on a housing body, and a power supply device that controls a lighting current to the LED is attached. In recent years, lighting fixtures in which a power supply device is housed in a housing body are also known. For example, a lighting fixture is known in which a light source substrate is installed on the lower surface of the bottom wall of the housing body, and the power supply device is stored in a storage portion formed on the upper surface of the bottom wall.

  However, in the lighting fixture that houses the power supply device described above, since the housing portion is located above the light source substrate, the housing portion is heated by the heat generated from the light source substrate, and is stored because of the property that the higher the temperature, the higher the air. It is conceivable that the upper part of the part is heated. This is considered to cause the performance deterioration of the power supply device stored in the storage unit.

JP 2010-16003 A JP 2011-187245 A

  The problem to be solved by the present invention is to provide an illuminating device that can accommodate a power supply device in a housing body and prevent the power supply device from becoming hot.

The lighting device according to the embodiment includes a substrate having a light emitting element mounted on one surface, an installation surface on which the other surface of the substrate is installed, a longitudinal direction substantially parallel to the installation surface, and at least a part of the installation surface. A housing formed integrally with a housing portion corresponding to an internal space having a bottom wall formed at a position not overlapping the substrate as a bottom surface and a side wall extending from a peripheral edge of the bottom wall as a side surface, and a housing portion for the housing And a power supply device that supplies power to a substrate installed on the installation surface, and a heat dissipation projecting integrally on the back side of the bottom wall of the housing portion from the outer surface of the housing in parallel with each other at regular intervals And fins.

FIG. 1 is a perspective view illustrating an appearance example of a lighting apparatus according to the embodiment. FIG. 2 is a perspective view illustrating an appearance example of the illumination device according to the embodiment. FIG. 3 is a perspective view showing an exploded example of the lighting device according to the embodiment. FIG. 4 is a perspective view showing an exploded example of the lighting device according to the embodiment. FIG. 5 is a perspective view showing an example of the appearance of a decorative frame according to the embodiment. FIG. 6 is a perspective view illustrating an appearance example of the decorative frame and the light distribution adjusting member according to the embodiment. FIG. 7 is a diagram schematically showing a cross section taken along line II shown in FIG. FIG. 8 is an explanatory diagram illustrating a substrate pressed by the pressing unit according to the embodiment. FIG. 9 is a diagram illustrating an assembly example of the lighting device according to the embodiment. FIG. 10 is a diagram illustrating an assembly example of the lighting device according to the embodiment. FIG. 11 is a diagram illustrating an assembly example of the lighting device according to the embodiment. FIG. 12 is a diagram illustrating an assembly example of the lighting device according to the embodiment.

  In the embodiment described below, in the lighting device 1, the light emitting element 52 is mounted on the first surface 51 a of the substrate 50. In addition, the housing 10 is provided with an installation surface 13 on which the other second surface 51b of the substrate 50 is installed, and a storage portion that is formed at a position where the longitudinal direction is substantially parallel to the installation surface 13 and at least a portion does not overlap the substrate 50 14. Further, the power supply device 40 is disposed in the housing portion 14 of the housing 10 and supplies power to the substrate 50 installed on the installation surface 13.

  In the embodiment described below, the light distribution adjusting member 70 adjusts the light distribution of the light emitted by the light emitting element 52. Further, the decorative frame 30 has a protruding portion 35 protruding inward on the inner surface of the insertion hole into which the light distribution adjusting member 70 can be inserted, and the protruding portion 35 on which the light distribution adjusting member 70 is placed and the housing 10. The light distribution adjustment member 70 is sandwiched between the installation surface 13 and the housing 10.

  In the embodiment described below, the light distribution adjusting member 70 includes a pressing portion 93 that presses the substrate 50 against the installation surface 13 of the housing 10 when the decorative frame 30 is fixed to the housing 10.

  In the embodiment described below, the light distribution adjusting member 70 includes a lower surface cover 80 that transmits light emitted from the light emitting element 52 and a reflector 90 that reflects light emitted from the light emitting element 52. . In addition, the decorative frame 30 has notches 37 a to 37 d formed at the edge of the insertion hole into which the light distribution adjusting member 70 can be inserted. In addition, the reflector 90 includes locking portions 91a to 91d that lock the lower surface cover 80 placed on the protruding portion 35 and the reflector 90 with the notches 37a to 37d in a separated state.

  In the embodiment described below, the decorative frame 30 is formed with screw holes 38a to 38c for fixing the casing 10 at the edge of the insertion hole on which the casing 10 is placed. Further, the housing 10 is formed with screw through holes 19a to 19c for passing through fixing screws fixed to the screw holes 38a to 38c, and for fixing the power supply device 40 to the bottom wall 14a of the storage unit 14. Screw holes 15a and 15b are formed. Further, the power supply device 40 is formed with screw through holes 41a and 41b through which fixing screws fixed to the screw holes 15a and 15b are passed.

  Hereinafter, an illumination device according to an embodiment will be described with reference to the drawings. In the embodiment, the same parts are denoted by the same reference numerals, and redundant description is omitted.

[External appearance of lighting device]

  FIG.1 and FIG.2 is a perspective view which shows the example of an external appearance of the illuminating device 1 which concerns on embodiment. In FIG. 1, the example which looked at the illuminating device 1 from diagonally upward direction is shown, and in FIG. 2, the example which looked at the illuminating device 1 from diagonally downward direction is shown.

  The lighting device 1 shown in FIGS. 1 and 2 is, for example, a downlight-type lighting fixture embedded in an indoor ceiling, and emits light from a light-emitting element such as an LED mounted therein, thereby allowing the lighting device 1 shown in FIG. And the room etc. which are located in the downward direction shown in FIG. 2 are illuminated. The lighting device 1 includes a housing 10, a top plate 20, and a decorative frame 30.

  The casing 10 is a metal having high thermal conductivity, and is molded by, for example, aluminum die casting.

The housing 10 has a plurality of heat radiation fins 12 protruding from the outer surface 11 at regular intervals. The heat radiating fins 12 release heat generated from the light emitting elements mounted inside the housing 10 to the outside of the housing 10. In addition, in the example shown in FIG. 1, although the code | symbol 12 was attached | subjected to some heat radiation fins, the member protruding in the outward direction from the outer surface 11 corresponds to the heat radiation fin 12. FIG.

  The top plate 20 is made of metal, for example, and closes the internal space of the housing 10 by being fixed to the upper portion of the housing 10. Note that the internal space of the housing 10 corresponds to a storage portion 14 in which a power supply device 40 described later is stored.

  The decorative frame 30 is made of a synthetic resin such as ABS resin, for example, and is a frame member for reducing glare by making the light emitting surface of the lighting device 1 difficult to see from the outside by being fixed to the housing 10. . Although it is made of synthetic resin as an example, it may be made of metal such as aluminum die casting. Further, the decorative frame 30 has an annular flange 31 protruding outward at the lower end portion, and spring mounting portions 33a to 33c are formed on the outer surface 32 (see FIGS. 5 and 9 described later). Attachment springs 34a to 34c are attached to these spring attachment portions 33a to 33c, respectively.

  The attachment springs 34a to 34c are elastic members made of metal plates, and are positioned substantially parallel to the outer surface 32 of the decorative frame 30 by being pressed upward from the outside while being attached to the spring attachment portions 33a to 33c. It is possible to bend up to. When the illuminating device 1 is embedded in a ceiling, the lighting springs 1 are inserted into the embedded holes in the ceiling wall in a state where the mounting springs 34a to 34c are bent to a position substantially parallel to the outer surface 32, and the annular flange 31 contacts the ceiling. It is pushed up until it does. Then, the mounting springs 34 a to 34 c are restored from the state shown in FIGS. 1 and 2 by being not pressed from the outside, and the ceiling wall is sandwiched between the annular flange 31. Thereby, the illuminating device 1 is embedded and installed in the ceiling.

[Disassembly example of lighting device]

  Next, a disassembled example of the lighting device 1 according to the embodiment will be described. FIG.3 and FIG.4 is a perspective view which shows the decomposition example of the illuminating device 1 which concerns on embodiment. In FIG. 3, the example which looked at the illuminating device 1 from diagonally upward direction is shown, and in FIG. 4, the example which looked at the illuminating device 1 from diagonally downward direction is shown.

  As shown in FIGS. 3 and 4, the lighting device 1 according to the embodiment includes a power supply device 40 and a substrate 50 in addition to the casing 10, the top plate 20, and the decorative frame 30 described with reference to FIGS. 1 and 2. And a sheet 60 and a light distribution adjusting member 70.

  First, the casing 10, the top plate 20, the power supply device 40, the substrate 50, and the sheet 60 will be described. As shown in FIG. 4, the housing 10 has a substantially circular installation surface 13 on which the substrate 50 is installed via a sheet 60. In addition, the housing 10 is formed with an annular wall 13 a extending downward from the peripheral edge of the installation surface 13.

  Moreover, as shown in FIG. 3, the housing 10 has a housing portion 14 in which the power supply device 40 is housed. The storage portion 14 is formed at a position where the longitudinal direction is substantially parallel to the installation surface 13 and at least a portion does not overlap the substrate 50. Specifically, as shown in FIG. 3, the housing 10 has a substantially rectangular bottom wall 14 a on the back side of the installation surface 13. The bottom wall 14 a is formed at a position where the longitudinal direction is substantially parallel to the installation surface 13 and at least a portion does not overlap the substrate 50. Moreover, the housing 10 has the side wall 14b extended upwards from the peripheral part of the bottom wall 14a. The storage portion 14 is formed by a space having an open upper end with the bottom wall 14a as a bottom surface and the side wall 14b as a side surface.

  In addition, the housing 10 is formed with a through hole 14 c that communicates from the storage portion 14 to the installation surface 13. The through hole 14 c is a through hole for connecting the substrate 50 installed on the installation surface 13 and the power supply device 40 stored in the storage unit 14.

  Moreover, as shown in FIG. 4, the housing 10 is provided with heat radiating fins 12a on the back side of the bottom wall 14a. The heat radiating fins 12a release the heat generated from the light emitting elements to the outside from the storage unit. In addition, in the example shown in FIG. 4, although the code | symbol 12a was attached | subjected to some heat radiation fins, the member protruding below from the lower surface of the housing 10 corresponds to the heat radiation fin 12a.

  Moreover, as shown in FIG. 3, the housing 10 is formed with screw holes 15a and 15b for fixing the power supply device 40 to the bottom wall 14a (see FIG. 11 described later). Specifically, screw bases 15c and 15d having a height smaller than that of the side wall 14b are formed on the bottom wall 14a (see FIG. 11 described later), and screw holes 15a are formed on the upper surface of the screw base 15c. The screw hole 15b is formed on the upper surface of the screw base 15d.

  The housing 10 is formed with screw holes 16 a to 16 c for fixing the top plate 20 to the upper end surface of the housing 10. In the example of FIG. 3, the housing 10 has screw holes 16 a and 16 b formed at the edge of the storage portion 14, and a screw hole 16 c other than the edge of the storage portion 14.

  Moreover, the housing 10 has a terminal block mounting plate 10a to which the terminal block 17 can be mounted. The terminal block mounting plate 10a is formed with a screw through hole 18 through which a fixing screw made of metal or the like passes when the terminal block 17 is fixed.

  The terminal block 17 relays power supply from a commercial AC power supply (not shown) to the power supply device 40. The terminal block 17 is formed with a screw hole 17a, and the fixing screw is fixed to the housing 10 by passing through the screw through hole 18 of the housing 10 from above and being screwed into the screw hole 17a.

  The power supply device 40 is formed in a planar shape having a size smaller than the bottom wall 14 a so that the power supply device 40 can be stored in the storage unit 14. The power supply device 40 is disposed in the storage unit 14 and supplies the power relayed from the terminal block 17 to the substrate 50 installed on the installation surface 13 via the power line 54. Although not shown in FIGS. 3 and 4, the power supply device 40 mounts a plurality of electrical components such as an electric field capacitor. In the power supply device 40, screw through holes 41 a and 41 b are formed at positions facing the screw holes 15 a and 15 b of the housing 10. The power supply device 40 is fixed to the housing 10 by fixing screws being passed through the screw through holes 41a and 41b from above and screwed into the screw holes 15a and 15b of the housing 10. As a result, the power supply device 40 is stored in the storage unit 14 of the housing 10.

  The top plate 20 has screw through holes 21a to 21c formed on the upper surface, and the fixing screws are fixed to the housing 10 by passing through the screw through holes 21a to 21c and screwed into the screw holes 16a to 16c of the housing 10. Is done. Thereby, the top plate 20 closes the storage part 14 formed in the housing 10.

  The board | substrate 50 is formed in the planar shape of the magnitude | size which can be installed in the installation surface 13 enclosed by the annular wall 13a of the housing 10. As shown in FIG. The substrate 50 has a first surface 51 a on which the light emitting element 52 is mounted, and a second surface 51 b installed on the installation surface 13 of the housing 10 via the sheet 60. The board | substrate 50 which concerns on embodiment shall be comprised by SMD (Surface Mount Device) form, and the some light emitting element 52 is mounted in the 2nd surface 51b. However, the substrate 50 is not limited to the SMD type, and is a COB in which a plurality of light emitting elements 52 are arranged and mounted on a part or the whole of the second surface 51b in a regular order such as a matrix shape, a staggered shape or a radial shape. (Chip on Board) type may be sufficient.

  Further, as shown in FIG. 4, a connector 53 is provided on the first surface 51 a of the substrate 50.

One end of a power line 54 is connected to the connector 53. Further, the other end of the power supply line 54 is connected to the power supply device 40 housed in the housing portion 14 of the housing 10 through the through hole 14c.

  Such a board | substrate 50 provides light indoors by making the light emitting element 52 light-emit with the electric power supplied from the power supply device 40. FIG. On the other hand, since the light emitting element 52 generates heat when the substrate 50 is turned on, there is a possibility that the temperature of the storage portion 14 and the like is increased.

  The sheet 60 is made of a synthetic resin having high thermal conductivity. The sheet 60 is formed in a planar shape having a size that can be installed on the installation surface 13 surrounded by the annular wall 13a, and the second surface 51b of the substrate 50. And the board | substrate 50 is closely_contact | adhered to the installation surface 13 of the housing 10 by carrying out close surface contact with both of the installation surface 13 of the housing 10 and. The substrate 50 brought into close contact with the installation surface 13 is connected to the power supply device 40 stored in the storage unit 14 through the through hole 14 c of the housing 10.

  Here, the heat generated from the substrate 50 is conducted through the sheet 60 to the housing 10 that is a metal having high thermal conductivity, and is released from the housing 10 into the atmosphere through the radiation fins 12. Thereby, in the illuminating device 1, the temperature rise of the board | substrate 50 and the accommodating part 14 can be suppressed.

  Further, as described above, in the lighting device 1 according to the embodiment, the storage unit 14 is formed at a position where the longitudinal direction is substantially parallel to the installation surface 13 and at least a portion does not overlap the substrate 50. For this reason, in the lighting device 1 according to the embodiment, even when a portion of the storage unit 14 that overlaps the substrate 50 is heated when the temperature of the heated air rises due to the heat generated from the substrate 50, It can prevent that the storage part 14 whole heats up. As a result, the lighting device 1 according to the embodiment can prevent the power supply device 40 housed in the housing unit 14 from being heated to a high temperature, and thus can prevent performance deterioration of the power supply device 40. Moreover, in the illuminating device 1 which concerns on embodiment, since it decided to arrange | position the plate-shaped power supply device 40 so that it might become substantially parallel to the bottom wall 14a which forms the accommodating part 14, the transversal direction of the accommodating part 14 ( The dimension in the height direction can be shortened. That is, in the illuminating device 1 according to the embodiment, the power supply device 40 can be prevented from being heated at a high temperature without increasing the size of the illuminating device 1 itself.

  Next, the casing 10, the decorative frame 30, and the light distribution adjusting member 70 will be described. The casing 10 is formed with screw through holes 19a to 19c through which fixing screws pass when the decorative frame 30 is fixed. In the example shown in FIGS. 3 and 4, the screw through holes 19 a to 19 c are formed in the peripheral edge portion of the installation surface 13. Further, an escape 19d is formed above the screw through hole 19a to allow the fixing screw to penetrate from above, and similarly an escape 19e is formed above the screw through hole 19b (described later). See FIG.

  As shown in FIGS. 3 and 4, the upper and lower ends of the decorative frame 30 are opened in a substantially circular shape, and an annular flange 31 protruding outward from the lower end edge is formed on the lower end edge of the decorative frame 30. .

The diameter of the upper edge of the decorative frame 30 is substantially the same as the diameter of the annular wall 13a. In addition, a circular protruding portion 35 that protrudes inward (center direction of the opening circle) is formed on the inner surface of the decorative frame 30 that is positioned at a predetermined height. Further, on the inner surface of the decorative frame 30, a positioning portion 36 that protrudes in the inner direction (center direction of the opening circle) and connects the protruding portion 35 and the upper end edge is formed.

  Further, notches 37a to 37d are formed at the edge of the upper end opening of the decorative frame 30, and screw holes 38a to 38c for fixing to the housing 10 are formed (FIGS. 5 and 9 to be described later). See). In the example of FIG. 3, the inner diameter of the decorative frame 30 is substantially the same from the upper end opening toward the projecting portion 35, and is gradually increased from the projecting portion 35 toward the lower end opening.

  The light distribution adjusting member 70 is a member that adjusts the light distribution of the light emitted by the light emitting element 52, and includes a lower surface cover 80 and a reflector 90. The lower surface cover 80 is a light-transmitting cover such as acrylic resin or polycarbonate, and is smaller than the inner diameter of the upper end opening of the decorative frame 30 so as to be placed on the protruding portion 35 of the decorative frame 30. Further, it is formed in a substantially planar circular shape larger than the inner diameter of the protruding portion 35. Further, the lower surface cover 80 is formed with a notch 81 having a slightly larger area than the positioning part 36 of the decorative frame 30.

  In addition to the light distribution adjustment function, the lower surface cover 80 serves to protect the conductive portion from the outside. Such a lower surface cover 80 is inserted from the upper end opening of the decorative frame 30 and placed on the protruding portion 35. At this time, the notch portion 81 is locked to the positioning portion 36 to prevent the lower surface cover 80 placed on the protruding portion 35 from rotating.

  The reflector 90 is, for example, a white synthetic resin having light resistance, heat resistance, and electrical insulation, and adjusts the light distribution of light emitted by the light emitting element 52. The reflector 90 is formed in a substantially circular shape smaller than the inner diameter of the upper end opening of the decorative frame 30 so that it can be inserted from the upper end opening of the decorative frame 30. In addition, the reflector 90 has both upper and lower ends opened in a substantially circular shape so that light emitted by the light emitting element 52 can pass therethrough. The inner diameter of the reflector 90 is gradually increased from the upper end opening toward the lower end opening.

  Further, the reflector 90 has locking portions 91a to 91d formed on the outer surface so that the lower surface 92 is not placed on the lower surface cover 80 (see FIGS. 6 and 10 described later). These locking portions 91 a to 91 d are locked to the notches 37 a to 37 d of the decorative frame 30 in a state where the lower surface cover 80 placed on the protruding portion 35 and the reflector 90 are separated from each other. This point will be described with reference to FIGS.

  5 and 6 are perspective views showing an example of the appearance of the decorative frame 30 and the light distribution adjusting member 70 according to the embodiment. FIG. 5 shows a state where the lower surface cover 80 is inserted into the decorative frame 30. FIG. 6 shows a state where both the lower surface cover 80 and the reflector 90 are inserted into the decorative frame 30.

  As shown in FIG. 5, when the lower surface cover 80 is inserted from the upper end opening of the decorative frame 30, it is placed on the protruding portion 35 without penetrating the decorative frame 30. Then, as shown in FIG. 6, when the reflector 90 is inserted into the decorative frame 30 in which the lower surface cover 80 is inserted, the reflectors 91a to 91d are inserted by being locked to the notches 37a to 37d. The depth is determined and is not placed on the lower surface cover 80. That is, in the lighting device 1 according to the embodiment, the distance between the placement surface of the protrusion 35 on which the lower surface cover 80 is placed and the lower surface 92 of the reflector 90 is longer than the thickness of the lower surface cover 80. In addition, locking portions 91 a to 91 d are formed on the outer surface of the reflector 90.

  In the decorative frame 30 described above, in a state where both the lower surface cover 80 and the reflector 90 are inserted, the fixing screw penetrates the screw through holes 19a to 19c of the housing 10 from above and the screw holes 38a to 38c of the decorative frame 30. It is fixed to the housing 10 by being screwed into the housing 10. That is, the housing 10 and the decorative frame 30 are fixedly provided with the substrate 50, the lower surface cover 80, and the reflector 90 interposed therebetween. As described above, in the lighting device 1 according to the embodiment, the substrate 50 of the housing 10 is fixed by the fixing screw, the lower surface cover 80 is fixed to the decorative frame 30, or the reflector 90 is fixed to the decorative frame 30. Since it is not provided, the assembly of the lighting device 1 can be facilitated, and the working speed for the assembly can be improved.

[Example of cross section of lighting device]

  Next, the cross section of the illuminating device 1 which concerns on embodiment is demonstrated. FIG. 7 is a diagram schematically showing a cross section taken along the line II shown in FIG. As shown in FIG. 7, the lower surface cover 80 is placed on the protruding portion 35 of the decorative frame 30. Further, the reflector 90 is inserted into the decorative frame 30 in a state in which the lower surface 92 and the lower surface cover 80 of the reflector 90 are separated from each other by placing the locking portions 91a to 91d in the notches 37a to 37d. The

  The longitudinal direction L1 of the storage portion 14 is substantially parallel to the installation surface 13 of the substrate 50, and at least a part of the storage portion 14 does not overlap the substrate 50. Further, a through hole 14 c that penetrates from the storage portion 14 to the installation surface 13 is formed.

  Here, when the decorative frame 30 is fixed to the casing 10, the edge at the upper end opening of the reflector 90 is a pressing portion 93 that presses the substrate 50 against the installation surface 13 of the casing 10 (see FIGS. 3 and 6). Reference). Specifically, in the example shown in FIG. 7, when the decorative frame 30 and the casing 10 are fixed by fixing screws, force is applied in a direction in which they are in close contact with each other. At this time, the notches 37 a to 37 d of the decorative frame 30 push up the locking portions 91 a to 91 d of the reflector 90 in the direction toward the installation surface 13. As a result, the pressing portion 93 presses the substrate 50 against the installation surface 13.

  The board | substrate 50 pressed by the press part 93 is demonstrated using FIG. In the example shown in FIG. 8, the pressing portion 93 of the reflector 90 presses the position indicated by the dotted line in the first surface 51 a of the substrate 50 in the direction toward the installation surface 13. Thereby, in the illuminating device 1 which concerns on embodiment, since the installation surface 13, the sheet | seat 60, and the board | substrate 50 can be closely_contact | adhered, the heat transfer property from the board | substrate 50 to the installation surface 13 can be improved. As a result, in the illuminating device 1 according to the embodiment, the substrate 50 can be efficiently cooled by the housing 10, and thus the temperature rise of the substrate 50 and the storage unit 14 can be suppressed.

[Assembly example of lighting device]

  Next, the assembly example of the illuminating device 1 which concerns on embodiment is demonstrated using FIGS. 9-12. In addition, in FIGS. 9-12, the example which looked at the illuminating device 1 from the upper direction is shown. First, as shown in FIG. 9, the decorative frame 30 is placed, and the attachment springs 34a to 34c are attached. Subsequently, the lower surface cover 80 is placed on the protruding portion 35 of the decorative frame 30.

  Subsequently, as shown in FIG. 10, the reflector 90 is inserted into the decorative frame 30. At this time, the engaging portions 91 a to 91 d of the reflector 90 are engaged with the cutout portions 37 a to 37 d (see FIG. 9) of the decorative frame 30, whereby the position where the reflector 90 is inserted is determined. Subsequently, the substrate 50 is placed on the reflector 90 and the sheet 60 is placed on the substrate 50.

  Subsequently, as shown in FIG. 11, the housing 10 is placed on the decorative frame 30. Then, fixing screws that pass through the screw through holes 19 a to 19 c of the housing 10 are screwed into the screw holes 38 a to 38 c of the decorative frame 30. By this screw fixing operation, the decorative frame 30, the substrate 50, the sheet 60, the lower surface cover 80, and the reflector 90 are attached to the housing 10.

  Subsequently, the power supply device 40 is stored in the storage unit 14 of the housing 10. Then, fixing screws that penetrate the screw through holes 41 a and 41 b of the power supply device 40 are screwed into the screw holes 15 a and 15 b of the housing 10. Thereby, the power supply device 40 is fixed to the housing 10. Further, a fixing screw that passes through the screw through hole 18 of the housing 10 is screwed into the screw hole 17 a of the terminal block 17. Thereby, the terminal block 17 is fixed to the housing 10.

  Subsequently, as shown in FIG. 12, the top plate 20 is placed on the housing 10. And the fixing screw which penetrated the screw through-holes 21a-21c of the top plate 20 is screwed into the screw holes 16a-16c (refer FIG. 11) of the housing 10. FIG. Thereby, the top plate 20 is fixed to the housing 10.

  As shown in FIGS. 9-12, in the illuminating device 1 concerning embodiment, since all the directions which screw a fixing screw are the same, it is not necessary to change the direction of each part at the time of an assembly. For example, in the illuminating device 1 according to the embodiment, as shown in FIGS. 9 to 12, each part is sequentially placed and assembled by screwing a fixing screw in the placed direction. For this reason, the illuminating device 1 which concerns on embodiment can aim at the improvement of the working speed concerning an assembly.

  As described above, according to the lighting device 1 according to the embodiment, the longitudinal direction of the storage unit 14 in which the power supply device 40 is stored is substantially parallel to the installation surface 13 of the substrate 50, and At least a part of the substrate 50 is formed so as not to overlap.

  Thereby, according to the illuminating device 1 which concerns on embodiment, even if it is a case where the air heated up with the heat which generate | occur | produces from the board | substrate 50 rises, it can prevent that the accommodating part 14 whole heats up. Therefore, it is possible to prevent the power supply device 40 stored in the storage unit 14 from becoming hot. For example, although it is known that the electric field capacitor etc. mounted in the power supply device 40 are weak to heat, according to the illuminating device 1 which concerns on embodiment, such performance degradation of the power supply device 40 can be prevented. .

  In particular, according to the lighting device 1 according to the embodiment, the power supply device 40 is housed in a position near the bottom wall 14a of the housing portion 14 as in the example shown in FIG. That is, according to the illuminating device 1 which concerns on embodiment, since the air heated up rises, the high temperature of the storage position of the power supply device 40 can be prevented.

  Moreover, according to the illuminating device 1 which concerns on embodiment, the housing 10 and the decorative frame 30 are fixed in the state which pinched | interposed the board | substrate 50, the lower surface cover 80, and the reflector 90. FIG. Thereby, according to the illuminating device 1 which concerns on embodiment, since it is not necessary to fix the board | substrate 50, the lower surface cover 80, and the reflector 90 with a fixing screw, the improvement of the working speed concerning an assembly can be aimed at.

  Moreover, according to the illuminating device 1 which concerns on embodiment, when the decorative frame 30 is fixed to the housing 10, the press part 93 of the reflector 90 presses the board | substrate 50 in the direction which goes to the installation surface 13. FIG. Thereby, according to the illuminating device 1 which concerns on embodiment, since the heat transferability from the board | substrate 50 to the installation surface 13 can be improved, the temperature rise of the board | substrate 50 or the accommodating part 14 can be suppressed.

Moreover, according to the illuminating device 1 which concerns on embodiment, the latching | locking part 91a-91d of the reflector 90 latches to the notch part 37a-37d of the decorative frame 30 in the state which spaced apart the lower surface cover 80 and the reflector 90. To do. Thereby, according to the illuminating device 1 which concerns on embodiment, even if it is a case where the housing 10 and the decorative frame 30 are fixed, the lower surface cover 80 presses in the direction which faces the protrusion part 35 by the lower surface 92 of the reflector 90. Therefore, the lower surface cover 80 can be prevented from being damaged. For example, when the lower surface cover 80 is pressed by the reflector 90 and the projecting portion 35, the lower surface cover 80 may be damaged or generate a creaking sound when thermally expanded by heat from the substrate 50. However, according to the illuminating device 1 which concerns on embodiment, the damage of the lower surface cover 80 can be prevented, and it can prevent that the sound which crawls from the lower surface cover 80 is emitted.
[Other Embodiments]

  In the above embodiment, the downlight has been described as an example. However, the lighting device 1 can be applied to a direct-mounted lighting fixture other than the type embedded in the ceiling.

  Moreover, although the example which fixes each member with a fixing screw was shown in the said embodiment, each member may be fixed with fixing members, such as pins other than a fixing screw, in the illuminating device 1. FIG.

  Moreover, the shape, the raw material, and the material of each member which concern on the said embodiment are not restricted to embodiment or what was illustrated. For example, the opening of the decorative frame 30 and the reflector 90 may be rectangular instead of circular, and similarly, the appearance of the decorative frame 30, the substrate 50, the sheet 60, the lower surface cover 80, and the reflector 90 is not circular. It may be a rectangle. Further, the shape of the storage portion 14 and the position where the power supply device 40 is stored are not limited to the above example. For example, FIG. 7 shows an example in which a part of the power supply device 40 is located above the through hole 14c. However, the power supply device 40 may be housed in a position that does not overlap the through hole 14c.

  As described above, according to the embodiment, the power supply device 40 can be housed and the power supply device 40 can be prevented from being heated.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 Illuminating device, 10 housing, 13 installation surface, 14 accommodating part, 20 top plate, 30 decorative frame, 40 power supply device, 52 light emitting element,

Claims (2)

A substrate having a light emitting element mounted on one side;
An installation surface on which the other surface of the substrate is installed, and a bottom wall formed in a position where the longitudinal direction is substantially parallel to the installation surface and at least a portion does not overlap the substrate, and a peripheral portion of the bottom wall A housing integrally formed with an accommodating portion corresponding to an internal space having a side surface extending from the side wall;
A power supply device that is disposed in the housing portion of the housing and supplies power to a substrate installed on the installation surface;
A heat dissipating fin projecting integrally from the outer surface of the housing in parallel with each other at regular intervals on the back side of the housing bottom wall;
A lighting device comprising:   The power supply substrate is mounted on a pair of screw bases having a height smaller than the height of the side wall formed on the bottom wall of the housing portion, and is disposed in the housing portion with a space between the bottom wall and the power supply substrate. The lighting device according to claim 1, wherein

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