JP5106179B2 - Lighting device - Google Patents

Description

  The present invention is characterized in that in a lighting device including a housing in which electronic components such as a light source and a power supply circuit that supplies power to the light source are disposed, a reinforcing member that reinforces the housing is disposed.

In recent years, lighting devices using light-emitting diodes (hereinafter referred to as LEDs) as light sources have been developed. An LED is smaller than a conventional light source such as a fluorescent lamp, and a structure for reducing the thickness of an illumination device using the LED as a light source has been proposed (for example, Patent Document 1).
FIG. 9 is a schematic cross-sectional view of a conventional lighting device 81 described in Patent Document 1. The lighting device 81 includes a plurality of LEDs 82 and a lighting circuit 83 that drives the LEDs 82. The lighting device 81 is thinned by arranging the LEDs 82 and the lighting circuit 83 in the same plane.
However, due to the thinning of the lighting device, there is a problem that the housing of the lighting device is bent. Therefore, for the purpose of preventing the case from bending, a lighting device having a reinforcing plate on the case has been proposed (for example, Patent Document 2).
FIG. 10 is an exploded perspective view of a lighting device 91 including a conventional LED 95 described in Patent Document 2. In the lighting device 91, a groove 93 is formed in the longitudinal direction of the housing 92, and a rigid reinforcing plate 94 is inserted at an intermediate position of the groove 93.
JP 2003-86006 A JP 2007-26721 A

However, although the conventional lighting device 91 described in Patent Document 2 includes the reinforcing plate 94, the planar reinforcing plate 94 is provided at an intermediate position in the longitudinal direction of the housing 92. However, it was larger than the area that was originally required for reinforcement, and was reinforced with a uselessly large reinforcing plate. Moreover, there existed a problem that an illuminating device will become heavy depending on the material of a reinforcement member.
Therefore, the lighting device according to the present invention can efficiently reinforce a necessary portion with a reinforcing member having a smaller area by dividing and arranging a reinforcing member that prevents bending, which is deformation of the housing. Become. Further, the reinforcement becomes stronger by arranging the plurality of reinforcing plates in a balanced manner.

Lighting apparatus of the present invention includes a light source, and the electronic components of the power supply circuit section for supplying electric power to the light source, and a reflecting member for reflecting light from the light source and the electronic-separated before Symbol light source part, the bottom surface In the lighting device including a housing disposed on one surface of the unit, the housing includes a reinforcing member for preventing deformation caused by a load of the electronic component on the back surface of the one surface, and the reflecting member includes It is provided on the one surface so as to form a cross with the reinforcing member, and the bottom portion of the casing is reinforced from both sides together with the reinforcing member.
With this configuration, it is possible to prevent bending, which is a deformation caused by the load of electronic components such as a light source and a power supply circuit unit housed in the lighting device. In particular, even when the lighting device is thinned, deformation of the housing can be prevented.

With this configuration, the casing can be reinforced in a balanced manner in a cross shape, so that the casing can be reinforced more strongly and bending can be prevented.

With this configuration, the reflecting member provided between the light source and the electronic component can reinforce the housing and prevent bending, and can prevent loss of light emitted from the light source in the housing.

This structure can be made compact lighting apparatus by accommodating the power supply circuit in the housing, simplifying installation of the lighting device becomes possible.

The illuminating device of the present invention includes a power circuit box that houses a power circuit as the electronic component, and the power circuit box is provided on one surface of the casing along the reflecting member. To do.
In the lighting device of the present invention, the reflecting member has a U-shaped cross section, and is arranged so that a bottom surface of the U-shape is in contact with a side surface of the power circuit box. It is characterized by being fastened together with one surface of the housing together with the installation surface to the housing.

In the illumination device of the present invention, the light source is an LED, and the electronic component is a power supply circuit unit that converts alternating current supplied from an external power source into direct current and supplies the direct current to the light source .
With this configuration, since the light source is a small LED, the lighting device can be made thin.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to prevent the deformation | transformation of the housing | casing by the load of electronic components, such as a light source provided in the illuminating device, and a power supply circuit.

  Hereinafter, embodiments of a lighting device of the present invention will be described with reference to the drawings. In the following description of the embodiment, a description will be given by exemplifying a lighting device of a square type having substantially the same length on four sides and provided on an installation surface such as an office or a home ceiling.

(Embodiment 1)
FIG. 1 is an essential part assembly perspective view seen from the front surface side of lighting apparatus 1 according to Embodiment 1 of the present invention. FIG. 2 is a perspective view of a main part viewed from the front surface side when the frame 3 of the lighting device 1 of FIG. 1 is removed. FIG. 3 is a perspective view of a main part viewed from the back side of the lighting device 1 of FIG.
In the present specification, the surface indicates a surface on the side where the lighting device 1 irradiates light, and the back surface indicates a surface opposite to the surface, and the lighting device 1 is installed on an installation surface such as a ceiling. The surface facing the installation surface is shown.

The lighting device 1 includes an LED 13 that is a light source and a housing 2 that houses electronic components such as a power supply circuit that drives the LED 13, and a diffusion plate that is provided on the front surface of the housing 2 and prevents glare of light emitted from the LED 13. 5 and a frame 3 that holds the diffusion plate 5 and protects the front surface of the housing 2.
The housing 2 is made of aluminum, and includes a bottom surface 6, side surfaces 7 provided on the four sides of the bottom surface 6, and a frame mounting surface 8 that extends perpendicularly to the side surface 7 and extends outside the housing 2. is doing. About the material of the housing | casing 2, another metal may be used and the metal which is lightweight and has favorable heat dissipation is used suitably.
The bottom surface 6 of the housing 2 is divided into three parts, and is composed of two light emitting units 12 provided with LEDs 13 as light sources and an electronic component housing unit 15 provided with a power supply circuit for supplying power to the LEDs 13. The electronic component housing part 15 is disposed between the two light emitting units 12, and the two light emitting units 12 and the electronic component housing unit 15 are partitioned by the reflector 10.

Individual configurations housed in the housing 2 will be described in detail.
In each of the two light emitting units 12, two LED boards 14 on which a plurality of LEDs 13 are mounted are attached to the bottom surface 6 by a locking member 20 such as a screw. In order to make the light emitted from the light emitting unit 12 uniform, the plurality of LEDs 13 are mounted on the LED substrate 14 in a matrix at uniform intervals. The LED board 14 is further provided with a limiting resistor (not shown) for limiting the current flowing through the LED 13 to a predetermined value or less and a connector (not shown) for connecting the LED boards 14.

  Moreover, it is preferable that a reflective sheet (not shown) is provided on the surface of the LED substrate 14. Or the surface of the LED board 14 may be metal-plated and processed as a reflective surface of a metal mirror surface. By doing so, the light irradiated from the LED 13, reflected by the diffusion plate 5 provided on the front surface of the housing 2 and returned to the inside of the housing can be reflected again on the surface of the LED substrate 14. Therefore, the light from the LED 13 can be prevented from being absorbed inside the housing, so that the light from the LED 13 can be efficiently used for illumination, and the illuminance on the irradiation surface can be increased.

  In the electronic component housing portion 15, two power circuit boxes 16 that house a power circuit portion (not shown) as an electronic component that supplies power to the LED 13 are arranged along the reflector 10 and parallel to the bottom surface 6. Installed. The power circuit box 16 is made of, for example, a metal such as iron, and protects electronic components and also has fire prevention measures. Although not shown, the power supply circuit unit includes a transformer circuit such as a transformer, a rectifier circuit, a constant current circuit, and the like, converts alternating current provided from an external power source into direct current, and supplies a constant current to the LED 13.

  In addition, by providing a plurality of metal power supply circuit boxes 16 on the bottom surface 6 of the housing 2, it is possible to prevent bending that is a deformation of the housing 2. Since the power circuit box 16 also acts as a reinforcing member, it can function efficiently with fewer members and contribute to the weight reduction of the lighting device 1.

  Further, the electronic component housing portion 15 is provided with a fast connection terminal 17 and a power line lead-in hole 19 for drawing a power line disposed on the ceiling or the like. Electrically connected. The power line drawing hole 19 is preferably fitted with a ring made of resin or the like so as not to damage the power line or subjected to end face processing such as brim processing. Moreover, the position where the quick connection terminal 17 and the power line lead-in hole 19 are provided is not limited to the position shown in the figure, and may be provided corresponding to the place where the power supply circuit box 16 is installed.

  Between the two light emitting units 12 and the electronic component housing unit 15, two reflectors 10 are provided in parallel from one side of the housing to the opposite side so as to divide each. The reflector 10 can prevent the light emitted from the LED 13 from being absorbed by the electronic component housing 15.

  The reflecting plate 10 is a metal plate whose cross section is bent in a U shape. The reflector 10 is arranged in such an orientation that the U-shaped bottom portion 21 is in contact with the side surface of the power circuit box 16, and the housing 2 is mounted together with the mounting surface on the bottom surface of the power circuit box 16 by a locking member 20 such as a screw. The bottom surface 6 is fastened together.

  The reflecting plate 10 is surface-treated as a reflecting surface that reflects light at least on the surface facing the light emitting unit 12. Since the LED 13 has a strong directivity, the light from the LED 13 is less likely to be directly reflected by the reflecting plate 10, but the light reflected by the diffusion plate 5 on the front surface of the housing 2 can be reflected again. It is possible to prevent the amount of light that is absorbed and lost by the component housing portion 15.

In addition, since the side surface 7 surrounding at least the light emitting unit 12 of the housing 2 is also surface-treated as a reflecting surface, it can be reflected from the four sides surrounding the light emitting unit 12. It is possible to eliminate the brightness gradation depending on the presence or absence.
In addition, since the plurality of reflecting plates 10 are provided on the bottom surface 6 from one side to the opposite side of the housing 2, the housing 2 can be bent. Since the reflecting plate 10 also acts as a reinforcing member, it can function efficiently with fewer members and contribute to the reduction in thickness and weight of the lighting device 1.

Next, the electrical connection between the power circuit unit housed in the power circuit box 16 and the light emitting unit 12 will be described.
The two power supply circuit boxes 16 are arranged in parallel adjacent to the opposing side surfaces 7 of the housing 2. The power supply circuit unit accommodated in the power supply circuit box 16 supplies current to the two LED boards 14 adjacent to the side surface 7 on the same side as the side surface 7 adjacent to the power supply circuit box 16. The wiring 18 that connects the power supply circuit unit and the LED substrate 14 is disposed along the side surface 7, and the minute gap 22 formed with the side surface 7 is inserted at the end of the reflection plate 10. In order to prevent light from the light emitting unit 12 from leaking into the electronic component housing unit 15, the gap is preferably as small as possible, and a hole to the extent that the wiring 18 can be inserted is formed at the end of the reflector 10. Also good.

  With the above configuration, current can be supplied from one power supply circuit unit to the two LED substrates 14 provided in the two light emitting units 12. Therefore, even if a failure occurs in one power supply circuit unit or one wiring 18 connecting the power supply circuit unit and the LED substrate 14 is disconnected, the other power supply circuit unit causes the two light emitting units 12 to be disconnected. Since the current can be supplied to the LED board 14 in the inside, although the luminance of the lighting device 1 is reduced, it can be irradiated by the two light emitting units 12. In addition, even when the dimming method of dimming light by stopping the supply of current from one of the power supply circuit units is illuminated from the two light emitting units 12, the entire surface of the lighting device 1 is It is possible to avoid darkening.

Next, the back surface 9 of the housing 2 will be described with reference to FIG.
Two reinforcing plates 11 are provided on the rear surface 9 of the housing 2 in parallel to the rear surface 9 of the housing 2 from one side to the opposite side of the housing 2. The reinforcing plate 11 is a metal plate having a U-shaped cross section, and can prevent bending caused by a load of an electronic component or the like housed in the housing 2 from the back surface 9 side.

The direction in which the plurality of reinforcing plates 11 are provided is a direction perpendicular to the reflecting plate 10 and the power supply circuit box 16 attached to the bottom surface 6. Therefore, the reinforcing plate 11 and the reflecting plate 10 or the reinforcing plate 11 and the power supply circuit box 16 are reinforced in a balanced manner in the cross shape, so that the bending of the housing 2 can be effectively prevented. Can do.
The reinforcing plate 11 also functions as a heat radiating member that radiates the heat emitted from the LED 13 and transferred to the housing 2. Therefore, since a plurality of functions are efficiently performed with fewer members, it is possible to contribute to weight reduction of the lighting device 1.

Next, a state where the frame 3 is attached to the housing 2 will be described.
A diffusion plate 5 and a frame 3 are provided on the front surface of the housing 2. The frame body 3 is a metal frame having an opening 23 at a position corresponding to the light emitting section 12, and is locked at four corners of the frame body mounting surface 8 by a frame body fastening section 4 such as a screw. The diffusing plate 5 is fitted into the opening 23 of the frame 3 and is configured so that the diffusing plate 5 and the frame 3 are on the same plane. Specifically, the diffusion plate 5 is vacuum-formed in a shape having a convex portion corresponding to the shape of the opening portion 23, and the opening portion is formed so that the surface from which the convex portion protrudes is flush with the surface of the frame 3. 23. The frame 3 may be locked to the frame mounting surface 8 so that the frame 3 can be locked to the housing 2 with a wire or the like instead of a screw. Since there are no screws on the surface of the frame 3, the appearance of the lighting device 1 is improved.

  Moreover, although the diffusing plate 5 used in the present embodiment is a milky white plate made of polycarbonate resin, it may be a transparent plate made of acrylic resin depending on the place where the lighting device 1 is installed and the application. If it is a transparent board, the illumination intensity of the room | chamber interior in which the illuminating device 1 is installed can be raised.

As described above, the reflector 10, the power circuit box 16, and the reinforcing plate 11 are caused by the load of the electronic components such as the power circuit that individually reinforces the housing 2 and is housed inside the housing 2. The case 2 is prevented from bending. That is, each functions as an independent reinforcing member. Moreover, since each is divided | segmented and comprised, the reinforcement of the housing | casing 2 is possible more efficiently.
Further, by disposing a plurality of divided reinforcing members at intervals rather than the planar reinforcing members, heat radiation from the housing 2 is not hindered.

Furthermore, since the casing 2 is reinforced in a cross shape by providing the reinforcing plate 11 and the reflecting plate 10 or the reinforcing plate 11 and the power circuit box 16 in the perpendicular directions, the casing 2 is reinforced in a balanced manner. Can do. Therefore, it is possible to reinforce the housing 2 more firmly by using a combination of a plurality of types of members acting as reinforcing members.
In addition, the reflecting plate 10, the power circuit box 16 and the reinforcing plate 11 are not planar reinforcing members, but are three-dimensional reinforcing members, so that stronger reinforcement is possible compared to planar reinforcing members. It becomes.

  In the present embodiment, the number of light emitting units is two, but is not limited to this, and may be further divided into four. The positions of the light emitting unit and the electronic component housing unit may be reversed, and the light emitting unit may be provided at the center of the housing.

(Embodiment 2)
FIG. 4 is a perspective view of a main part when viewed from the front surface side when the frame of the illumination device 31 according to Embodiment 2 of the present invention is removed. FIG. 5 is a plan view of a principal part viewed from the front surface side of the illumination device 31 of FIG. FIG. 6 is an enlarged perspective view of a main part of an ion generator 33 used in the illumination device 31 of FIG.
The illuminating device 31 of the present embodiment is an illuminating device provided with an ion generating device 33 such as a plasma cluster ion generating device (plasma cluster is a registered trademark) in the electronic component housing portion 15. The electronic component housing 15 is also provided with a fan 34 for diffusing ions generated from the ion generator 33. About the same structure as Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

As in the first embodiment, the housing 2 of the lighting device 31 includes two light emitting units 12 and an electronic component housing unit 15 on the bottom surface 6, and each has two reflecting plates 10 disposed on the bottom surface 6. Are separated.
An ion generator 33 is attached to the surface of the reflector 10 on the electronic component housing 15 side, and a fan 34 that diffuses ions generated from the ion generator 33 is provided on the bottom surface 6 of the housing 2. The power circuit box 16 that houses the power circuit section is not provided in the electronic component housing section 15 and is attached to the back side of the housing 2 of the lighting device 31. Alternatively, it may be separately placed behind the ceiling where the lighting device 31 is installed. Note that the ion generator may be provided on the bottom surface 6 of the housing 2.

  Further, as shown in FIG. 4, the wiring 18 from the power supply circuit section provided on the back side of the housing 2 is inserted into the power wire drawing hole 19 and disposed in the housing 2 to be connected to the LED substrate 14. Power is being supplied. Similarly, the ion generator 33 and the fan 34 are connected by the wiring 18 from the power supply circuit unit and supplied with power from the power supply circuit unit.

Next, the ion generator 33 and the fan 34 installed in the electronic component storage unit 15 will be described in detail.
For example, a plasma cluster ion generator (registered trademark) as the ion generator 33 is an ion generator 33 as disclosed in detail in Japanese Patent Application Laid-Open No. 2003-45611, and plasma discharges water vapor in the air. Is ionized to generate substantially the same amount of positive ions and negative ions. A positive ion is a cluster ion in which a plurality of water molecules are attached around a hydrogen ion (H ⁺ ), and is expressed as H ⁺ (H ₂ O) _m (m is a natural number). Negative ions are cluster ions in which a plurality of water molecules are attached around oxygen ions (O ₂ ⁻ ), and are expressed as O ₂ ⁻ (H ₂ O) _n (n is a natural number). These positive ions and negative ions aggregate into suspended matter (particles, bacteria) in the space and chemically react with each other to become hydrogen peroxide H ₂ O ₂ or hydroxyl radical / OH as an active substance, and oxidation reaction This inactivates suspended particles and sterilizes suspended bacteria.

  As shown in FIG. 6, the ion generator 33 includes a substantially rectangular parallelepiped case 35, an ion generating element 36 on one surface of the case, and a circuit board for generating a drive waveform of the ion generating element 36 inside the case ( A boosting coil (not shown) for applying a high voltage to the electrodes is provided. The ion generating element 36 includes a grid-shaped discharge electrode 37, a planar induction electrode 38 embedded so as to face the discharge electrode 37, and a protective layer (not shown) that covers and protects the upper portion of the discharge electrode 37. And positive ions and negative ions are generated by the action of plasma discharge by applying a high-voltage AC driving voltage to both electrodes.

  The ion generator 33 is provided on the surface of the reflecting plate 10 on the electronic component housing part 15 side so that the ion generating element 36 that generates ions is on the surface. Moreover, the ion generator 33 may be provided in any of the two reflecting plates 10, and the position provided is not limited to the vicinity of the center as shown in the figure. Moreover, you may provide in the bottom face 6 of the housing | casing 2 instead of the reflecting plate 10. FIG. It is preferable that the ion generating element 36 is provided in the middle of the air path blown from the fan 34.

Next, the fan 34 attached with the ion generator 33 is demonstrated.
As the fan 34, for example, a sirocco fan (multi-blade fan) is preferably used. The sirocco fan is a centrifugal fan having many blades facing forward. In a thin lighting device such as the present embodiment, a sirocco fan used for AV equipment that is small and quiet is particularly preferable.

  The fan 34 is configured to include a plurality of blades inside the case, rotate the blades, accelerate air sucked from the center of the case with centrifugal force, and blow the air from the air blowing port 39. The fan 34 is provided on the bottom surface 6 of the housing 2, and is attached so that the air blown from the air blowing port 39 is directed to the ion generating element 36.

The frame 3 is a metal frame having an opening 23 as in the first embodiment, and is attached to the front surface of the lighting device 31 by holding the diffusion plate 5 in the opening 23. In addition, at a position corresponding to the electronic component housing portion 15 of the frame body 3, there are an intake port 41 for sucking air into the lighting device 31 and an exhaust port 42 for exhausting air containing ions generated by the ion generator 33. Is provided.
Therefore, while the room where the illuminating device 31 is installed is illuminated, air containing ions is blown into the room and the room air is purified.

  The fan 34 not only diffuses ions generated by the ion generator 33 as described above, but also has a function of cooling the housing 2. Since the lighting device 31 using the LED 13 as a light source generates a large amount of heat from the LED 13, a structure for dissipating the heat is required. However, the fan 34 blows air to the housing 2 to which the heat from the LED 13 has been transferred. The body 2 can be cooled and the heat dissipation effect of the lighting device 31 can be enhanced.

  Also in the present embodiment, the reflecting plate 10 and the reinforcing plate 11 individually reinforce the housing 2 and load on the electronic components such as the ion generator 33 and the fan 34 housed in the housing 2. The bending of the casing 2 caused by the above is prevented. Further, since the reflecting plate 10 and the reinforcing plate 11 are divided into a plurality of parts, the housing 2 can be more effectively reinforced. Moreover, since the reflecting plate 10 and the reinforcing plate 11 are installed in a direction that forms a vertical direction, the housing 2 can be reinforced in a balanced manner in a cross shape, and the bending of the housing 2 is effectively prevented. can do.

(Embodiment 3)
FIG. 7 is an essential part assembly perspective view of the illumination device 51 according to the third embodiment of the present invention as viewed from the back. FIG. 8 is a diagram illustrating an illumination state when the illumination device 51 of FIG. 7 is provided on an installation surface such as a ceiling. About the same structure as Embodiment 1 or Embodiment 2, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIG. 7, the lighting device 51 of the present embodiment is provided with a slit 54 on a side surface 53 of a housing 52 of the lighting device 51. Since slits 54 are continuously formed on all four side surfaces 53 of the casing 51, light leaks even from the side surfaces 54 of the lighting device 51. Therefore, the leaked light can also illuminate the surroundings of the lighting device 51 in the horizontal direction, and when the lighting device 51 is installed on an installation surface such as a ceiling, the installation surface can be illuminated with the leaked light. So it also functions as indirect lighting.

  Referring to FIG. 8, when illumination device 51 is provided on an installation surface such as a ceiling, illumination is performed so that the illuminance gradually decreases as the distance from illumination device 51 increases around illumination device 51 on the installation surface. Will be. Therefore, the indirect illumination on the installation surface can be felt more naturally.

  Furthermore, an intrusion protection member such as a transparent film or net may be provided on the inside of the housing of the slit 54 so that dust, insects, etc. do not enter the inside of the housing 52 through the slit 54. The reliability of the lighting device 51 can be increased.

  Since LEDs are more directional than conventional light sources such as fluorescent lamps, an illumination device using LEDs as a light source is only illuminated from the front, and does not illuminate the installation surface to which the illumination device is attached, so the ceiling in the room There was a problem that only the surface was not illuminated and the user felt uncomfortable. However, the configuration of the lighting device according to the present embodiment can indirectly illuminate the installation surface around the lighting device, so that the ceiling surface is bright and natural lighting, and the above problem is alleviated.

  The shape of the slit 54 is not limited to a rectangle as shown in FIG. 7, and may be a circle or a triangle. Moreover, it is preferable that the space | interval between the slits 54 is also suitably adjusted according to the intensity of the light to utilize for indirect illumination.

  As described above, the embodiment has been described by exemplifying the square type illumination device having substantially the same length on the four sides. However, the present invention is not limited to the square type, and other types of illumination devices such as an elongated type and a circular type can be used. May be. In the case of a circular illumination device, for example, by arranging a plurality of divided reinforcing members in a cross shape, deformation of the housing can be prevented.

Moreover, the form of the lighting device is not limited to a large general lighting device such as a ceiling light used in offices and homes. However, if the lighting device is particularly large, there is a problem of bending of the casing due to thinning. Is significant, the present invention is suitable.
The light source is not limited to the LED, and may be a fluorescent lamp such as a cold cathode fluorescent lamp (CCFL) or a high-frequency lighting-only fluorescent lamp (Hf fluorescent lamp). A light source may be used.
Furthermore, the electronic component installed in the electronic component housing unit is not limited to the above embodiment, and may be another electronic component.

It is the principal part assembly perspective view seen from the surface side of the illuminating device of Embodiment 1 of this invention. It is the principal part perspective view seen from the surface side at the time of removing the frame of the illuminating device of FIG. It is the principal part perspective view seen from the back side of the illuminating device of FIG. It is the principal part perspective view seen from the surface side at the time of removing the frame of the illuminating device of Embodiment 2 of this invention. It is the principal part top view which looked at the illuminating device of FIG. 4 from the surface side. It is a principal part expansion perspective view of the ion generator used for the illuminating device of FIG. It is a principal part assembly perspective view seen from the back surface of the illuminating device of Embodiment 3 of this invention. It is a figure which shows an illumination state when the illuminating device of FIG. 7 is provided in installation surfaces, such as a ceiling. It is a schematic sectional drawing of the conventional illuminating device. It is a disassembled perspective view of the conventional illuminating device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 31, 51 Illuminating device 2, 52 Case 3, 31 Frame body 4 Frame body fastening part 5 Diffusion plate 6 Bottom surface 7, 53 Side surface 8 Frame body attachment surface 9 Back surface 10 Reflecting plate 11 Reinforcement plate 12 Light emitting part 13 LED
DESCRIPTION OF SYMBOLS 14 LED board 15 Electronic component accommodating part 16 Power supply circuit box 17 Fast connection terminal 18 Wiring 19 Power line drawing-in hole 20 Locking member 33 Ion generator 34 Fan 35 Case 36 Ion generating element 37 Discharge electrode 38 Induction electrode 39 Blower port 41 Inlet port 42 Exhaust port 54 Slit

Claims (4)

And the light source,
And electronic components of the power supply circuit section for supplying electric power to the light source,
And a reflecting member for reflecting light from the light source and the electronic-separated before Symbol source components, the lighting device comprising a housing which is arranged on one surface of the bottom portion,
The housing includes a reinforcing member for preventing deformation caused by the load of the electronic component on the back surface of the one surface.
The reflection device is provided on the one surface so as to form a cross with the reinforcing member, and reinforces the bottom surface portion of the housing from both sides together with the reinforcing member. A power supply circuit box that houses a power supply circuit as the electronic component;
The lighting device according to claim 1, wherein the power supply circuit box is provided on one surface of the housing along the reflective member. The reflective member is
The cross section has a U shape,
The U-shaped bottom surface is disposed in contact with the side surface of the power supply circuit box, and the power supply circuit box is fastened together with one surface of the housing together with the installation surface of the power supply circuit box. The lighting device according to claim 2. The light source is an LED;
The lighting device according to any one of claims 1 to 3, wherein the electronic component is a power supply circuit unit that converts alternating current supplied from an external power source into direct current and supplies the converted light source to the light source.