JP2024154751A - Lighting fixtures - Google Patents

Abstract

[Problem] To provide a lighting fixture capable of improving heat dissipation against heat generated from electronic components on a power supply board. [Solution] A module board 24 has a plurality of LED elements 23 on a light source mounting surface 24a, the LED elements 23 are arranged in an LED arrangement area 24D including the center of the light source mounting surface 24a in a plan view, and a power supply board 22 is arranged on the surface of the module board 24 opposite the light source mounting surface 24a so as to overlap with the module board 24 in a plan view, and includes a power supply box 26 that is a metallic power supply storage section, and the power supply box 26 covers at least the mounting surface side of heat-generating components such as a heat storage section 22a arranged on the power supply board 22. [Selected Figure] Figure 1

Description

The present invention relates to lighting fixtures, and more particularly to small, thin LED lighting fixtures.

LED lighting fixtures that use LED elements as the light source have been well known for some time, and in particular ceiling-mounted ceiling lights that are connected to wiring fixtures installed on the ceiling surface have been well known.

The LED lamp body attached to the mounting part in the prior art includes a substrate, a heat dissipation member that dissipates heat from the LED element, and a base member that holds the substrate and heat dissipation member, and the base member is provided with a hook blade that is electrically and mechanically connected to the wiring device of the mounting part (see, for example, Patent Document 1).

In conventional lighting fixtures, the upper side of the electronic components on the power supply board is covered only by a base member made of resin, which has poorer heat dissipation properties than components made of metal. This causes heat to build up inside the base member, and high-temperature operation can shorten the lifespan of the electronic components on the power supply board.

JP 2015-176851 A

Therefore, the present invention was made in consideration of the above problems, and aims to provide a lighting fixture that can improve the heat dissipation properties of heat generated by electronic components on the power supply board.

The problem that the present invention aims to solve is as described above, and the means for solving this problem will be explained next.

That is, the lighting fixture disclosed in the present application includes a main body provided with a hook blade that is electrically and mechanically connected to a wiring fixture of a mounting portion;
A power supply board connected to the hook blade, a module board on which a plurality of LED elements are arranged, and a shade arranged on the irradiation surface side of the main body;
In a lighting fixture comprising:
the module substrate includes a plurality of LED elements on a light source mounting surface, the LED elements being arranged in an LED arrangement region including a central portion of the light source mounting surface in a plan view;
the power supply board is disposed on a surface of the module board opposite a light source mounting surface thereof so as to overlap the module board in a plan view;
Equipped with a metal power supply compartment,
The power supply housing section covers at least the mounting surface side of the heat generating components arranged on the power supply board.

In the lighting fixture disclosed in the present application, it is preferable that the power supply storage section is formed in a box shape with a bottom, and the power supply board is disposed within the power supply storage section.

In the lighting fixture disclosed in the present application, it is preferable that the power supply storage section has a step portion on a part of the bottom surface on the mounting surface side that is located closer to the irradiation surface side than other parts.

In the lighting device disclosed in this application, it is preferable that the main body has a wall portion that fits along a part of the side of the power supply storage section.

The present invention relates to a lighting device having a locking mechanism,
The lock mechanism includes a release button, a lock button, and a spring.
It is preferable that one end of the spring abuts against the lock button and the other end abuts against the power source storage section.

In the lighting fixture disclosed in the present application, it is preferable that the power supply storage section has a step in a part of the bottom surface on the mounting side that is located closer to the irradiation surface side than other parts, and that a part of the locking mechanism is located between the step and the main body.

The present invention can improve the heat dissipation performance of heat generated from the power storage section of the power supply board, etc.

1 is an exploded perspective view of a lighting fixture according to an embodiment of the present invention, viewed obliquely from above. FIG. 4 is an exploded perspective view showing the lighting fixture as viewed obliquely from below. FIG. 4 is a cross-sectional view taken along line A-A in FIG. 3 . 4 is a cross-sectional view taken along line B-B in FIG. 3 . FIG. 13 is a plan view showing the lighting fixture in the state where the release button has been moved to the release side. 7 is a cross-sectional view taken along line CC in FIG. 6 . 7 is a cross-sectional view taken along line D-D in FIG. 6. FIG. 13 is a plan view showing the lighting fixture with the release button moved to the lock side. 10 is a cross-sectional view taken along line E-E in FIG. 9 . FIG. FIG. 4 is an exploded perspective view showing the device body and the power supply box from diagonally below. FIG.

A lighting fixture 11 according to one embodiment of the present invention will be described with reference to Figs. 1 to 13. The lighting fixture 11 according to this embodiment is a lighting fixture using an LED element 23 as a light source. The lighting fixture 11 can be used as a direct-attached ceiling light that is directly attached to the mounting portion C, such as a ceiling surface. The lighting fixture 11 can also be attached to a wall surface (including an inclined surface) and used as a bracket light. In the following description, the side that emits light from the lighting fixture 11 is the irradiation surface side of the lighting fixture 11, and the side of the lighting fixture 11 that faces the mounting portion C is the mounting surface side (opposite to the irradiation surface side) of the lighting fixture 11. The mounting surface side of the lighting fixture 11 is the back side (rear side) of the lighting fixture 11. In addition, when the lighting fixture 11 shown in Fig. 2 is attached to the mounting portion C, if the direction perpendicular to the mounting portion C is the up-down direction of the lighting fixture 11, the mounting surface side of the lighting fixture 11 will be described as the upper side, and the direction directly below the irradiation surface side of the lighting fixture 11 will be described as the lower side. The direction perpendicular to the vertical direction of the lighting fixture 11 will be described as the side of the lighting fixture 11. In the following description, the state in which the lighting fixture 11, etc. is viewed from above will be referred to as a plan view. The state in which the lighting fixture 11, etc. is viewed from a direction perpendicular to the vertical direction will be referred to as a side view. The state in which the cross-sectional shape of the lighting fixture 11, etc. is viewed will be referred to as a cross-sectional view.

As shown in Figures 1 and 4, the lighting fixture 11 has a hook blade 12 that can be directly connected to a wiring device Cb, such as a hook-on ceiling, that has been installed in advance on a mounting portion C, such as a ceiling surface. By inserting the hook terminal 12a of the hook blade 12 into a connection hole (not shown) of the wiring device Cb and rotating the lighting fixture 11, it is electrically and mechanically connected to the wiring device Cb placed on the mounting portion C. This allows the lighting fixture 11 to be attached to the mounting portion C via the wiring device Cb using the hook blade 12, without the need for separate connection parts such as a hook-on ceiling cap or hook-on ceiling adapter, or mounting parts such as wood screws.

1 to 4, the lighting fixture 11 includes a fixture body 21 on which a pair of hook blades 12 are provided, a power supply unit having a power supply board 22 connected to the hook blades 12, a light source unit having a module board 24 on which a plurality of LED elements 23 are arranged, and a shade 35 arranged on the irradiation surface side of the fixture body 21. The external shape of the lighting fixture 11 is approximately circular in a plan view, and has a thin, flat, approximately cylindrical shape with a dimension in the height direction of the lighting fixture 11 (the vertical direction of the lighting fixture 11 in FIG. 2) smaller than the dimension in the radial direction of the lighting fixture 11 (the direction perpendicular to the vertical direction of the lighting fixture 11 in FIG. 2).
The external shape of the lighting fixture 11 is not limited to that of the present embodiment. The external shape of the lighting fixture 11 may be, for example, an ellipse, a square, a rectangle, a polygon, a sector, or a combination of these shapes in addition to a substantially circular shape in a plan view.
The hook blade 12 of this embodiment is formed by bending into a Z-shape. The hook blade 12 has a hook end 12a at one end that can be connected to a wiring device Cb provided on the mounting surface C, and a pin-shaped terminal portion 12b at the other end that connects to the power supply board 22. Between the hook end 12a and the terminal portion 12b, there is a flat portion 12c that intersects with the hook end 12a and the terminal portion 12b.

The fixture body 21, which corresponds to the main body in the lighting fixture of the present invention, is a cylindrical member with a bottom that houses the module board 24 and the power supply box 26 inside and has a mounting end face for mounting the shade 35 at the bottom, as shown in Figures 4 and 12. The fixture body 21 has a cylindrical portion 32, an annular peripheral end portion 33 that extends downward from the lower end of the cylindrical portion 32, and an upper surface portion 34 that is formed to cover the upper end of the cylindrical portion 32.

As shown in FIG. 3, the upper surface 34 of the main body 21 is provided with a through hole 28 for exposing the hook terminal 12a of the hook blade 12. The through hole 28 is provided in two places on the upper surface 34 of the main body 21, and is formed larger than the width of the hook terminal 12a of the hook blade 12. The main body 21 has guide tubes 29 that extend downward from the irradiation surface side of the upper surface 34. The guide tubes 29 are formed with a step shape in the middle so that the flat parts 12b of the hook blades 12 can be fixed with screws or the like (see FIG. 5). The through holes 28 are provided so as to be continuous with the openings of the guide tubes 29. The guide tubes 29 are provided with two protruding parts 29a that protrude inward on the inner surface of the opening. The flat portion 12c of the hook blade 12 has two notches corresponding to the protrusions 29a, and by aligning the notches of the flat portion 12c with the protrusions 29a, the horizontal position of the hook blade 12 in the guide tube portion 29 can be easily determined and misalignment can be prevented. This makes it possible to prevent misalignment of the hook blade 12 due to load on the hook blade 21 caused by the rotating action during installation of the lighting fixture 11. Because the hook blade 12 is less likely to misalign, deformation of the terminal portion 12b due to misalignment and poor connection with the power supply board 22 are prevented.

The device body 21 can be made of an insulating resin material. In this embodiment, it is made of PBT (Poly Butylene Terephthalate) as an example. Note that the device body 21 is not limited to PBT, and can be made of any resin material that has the necessary insulating properties and mechanical strength.

The fixture body 21 has a peripheral end 33 that protrudes downward from the end on the irradiation surface side. The peripheral end 33 of the fixture body 21 is fitted with the inner peripheral surface of a shade 35.
Further, an engagement groove 31 is provided along the circumferential direction on the peripheral end portion 33. An engagement claw 30 that engages with the engagement groove 31 of the peripheral end portion 33 is formed on the inner peripheral surface of the shade 35.

The device body 21 has a wall portion 21b that stands upright in the vertical direction from the irradiation surface of the upper surface portion 34 on the inner surface side of the cylindrical portion 32, a plurality of first bosses 21c (three in this embodiment), and a second boss 21d.
The outer shape of the wall portion 21b is formed in a shape that follows, in a plan view, a part of the outer shape of the module substrate 24 described later. The end face on the irradiation surface side of the wall portion 21b abuts against the vicinity of the outer circumferential end on the mounting surface side of the module substrate 24, and can determine the position of the module substrate 24 in the device body 21 in the up-down direction.
The multiple first bosses 21c are provided in a space surrounded by the wall portion 21b. In this embodiment, the three first bosses 21c are provided to respectively correspond to the three screw members 51 that fix the module board 24. The module board 24 is fixed to the device body 21 by screwing the three screw members 51 into the three first bosses 21c through the three through holes 24b provided in the module board 24.
The second boss 21d is provided at a position overlapping the power supply box 26 described later in plan view. In this embodiment, the second boss 21d is provided at a position overlapping the step portion 26c in plan view. The second boss 21d is provided to correspond to a screw member 52 that fixes the power supply board 22. By screwing the screw member 52 into the second boss 21d through a through hole (not shown) provided in the power supply board 22, the power supply board 22 is fastened together with the step portion 26c of the power supply box 26 to the fixture body 21. This allows the power supply board 22 to be fixed to the fixture body 21 with high adhesion to the step portion 26c.

The light source unit of this embodiment has a module board 24 and a plurality of LED elements 23 mounted on the module board 24. As shown in Figs. 2, 5 and 6, the module board 24 has a plurality of LED elements 23 on the light source mounting surface 24a. The power supply board 22 has circuit components of a lighting circuit that supplies power to the module board 24 to light the plurality of LED elements 23. The module board 24 and the power supply board 22 are arranged on the irradiation surface side of the fixture body 21, with the module board 24 mounted with the LED elements 23 arranged on the irradiation surface side and the power supply board 22 arranged on the mounting surface side. The module board 24 and the power supply board 22 are arranged in positions that overlap when viewed from above on the fixture body 21. The module board 24 is arranged so that the outer periphery of the module board 24 abuts against the lower end of the side portion 21b of the fixture body 21.

Module board 24 is also formed using a metal base board. In this embodiment, module board 24 is formed using an aluminum board. Metal base boards have high thermal conductivity and can efficiently dissipate heat from heat-generating components such as LED elements 23. Aluminum boards in particular have high thermal conductivity and therefore excellent heat dissipation properties, and when the ambient temperature is lower than the temperature of module board 24, heat generated by LED elements 23 can be efficiently dissipated to the surroundings of module board 24.

As shown in Figures 2, 5, and 6, the LED elements 23 are arranged on the light source mounting surface 24a, which is the irradiation surface side of the module board 24. The light source mounting surface 24a of the module board 24 is coated with a white solder resist. By painting the light source mounting surface 24a white, the light reflectance of the light source mounting surface 24a can be increased, and the light quantity of the LED elements 23 can be effectively utilized.

2, the light source mounting surface 24a is provided with an LED arrangement region 24D in which the LED elements 23 are arranged. The LED arrangement region 24D is a region that includes at least a central portion of the light source mounting surface 24a in a plan view. In this embodiment, the LED arrangement region 24D is provided over the entire light source mounting surface 24a of the module substrate 24, and the multiple LED elements 23 are arranged to be uniformly distributed in a plan view.
With this configuration, the LED elements 23 serving as light sources are disposed in a generally dispersed manner, thereby realizing a uniform light-emitting surface.

In this embodiment, the LED arrangement area 24D is provided over the entire light source mounting surface 24a of the module substrate 24, but it is sufficient that the LED arrangement area 24D is an area that includes the center when viewed from above. For example, the LED arrangement area 24D can be arranged in a strip-shaped area that includes the center when viewed from above.

The power supply unit of this embodiment has a power supply board 22 on which a power supply circuit is formed. The power supply board 22 is configured with a power supply circuit in which a plurality of electronic components are mounted on an insulating printed wiring board. The power supply circuit of the power supply board 22 is a power supply circuit for supplying power to a plurality of LEDs 23 mounted on a module board 24 to light the LEDs 23. The power supply board 22 is electrically and mechanically connected to the terminal portion 12b of the hook blade 12 to receive AC current from an external commercial power source. The power supply board 22 converts the AC current of the external commercial power source supplied through the hook blade 12 into a predetermined DC current, and supplies the converted current to the plurality of LEDs 23 mounted on the module board 24 to light them up. A heat generating component 22a, such as a capacitor, is included as a part of the plurality of electronic components constituting the power supply circuit.
In this embodiment, the hook blade 12 and the power supply board 22 are connected by soldering. The power supply board 22 has through holes 22b, 22b at positions corresponding to the terminal portions 12b of the two hook blades 12, respectively. The power supply board 22 of this embodiment is positioned in the vertical direction in the tool body 21 by abutting with the two guide tube portions 29, 29. This makes it possible to easily position the power supply board 22 at an appropriate position relative to the hook blade 12. When the power supply board 22 is set at a predetermined position, the tip of the terminal portion 12b of the hook blade 12 is inserted into the through hole 22b of the power supply board 22. In this state, the hook blade 12 and the power supply board 22 are physically and electrically connected by soldering from the irradiation surface side of the power supply board 22.

As shown in Figs. 1 and 2, the power supply board 22 is rectangular in plan view and is stored in a power supply box 26. The power supply board 22 and the power supply box 26 are arranged on the side opposite the light source mounting surface 24a of the module board 24 (the mounting surface side of the lighting fixture 11) so as to overlap with the module board 24 in plan view. The power supply box 26 is configured to cover at least the mounting surface side of the heat generating component 22a arranged on the power supply board 22.

As shown in Figs. 1 to 4, the power supply box 26 is formed in a box shape with a bottom that is rectangular in plan view, and is configured to be able to store the power supply board 22. The power supply box 26 includes a bottom plate 26a disposed on the mounting surface side, and a side plate 26b that stands downward from the periphery of the bottom plate 26a. The side plate 26b is formed so as to surround the outer periphery of the power supply board 22. The power supply board 22 is restricted in the front-rear and left-right directions in the power supply box 26 by the side plate 26b. This makes it possible to easily arrange the power supply board 22 at a predetermined position in the power supply box 26. In addition, a step portion 26c is provided in a part of the bottom surface on the mounting surface side, which is arranged closer to the irradiation surface side than the other parts. When the power supply box 26 is arranged at a predetermined position in the device body 21, the step portion 26c is arranged at a position that is approximately flush with the lower end of the guide tube portion 29. As a result, the power supply board 22 is arranged in the power supply box 26 so as to abut or be close to both the step portion 26c and the guide tube portion 29. Since the power supply board 22 abuts or is in close contact with the step portion 26c, heat generated from the power supply board 22 is easily transferred to the power supply box 26, as described below, and heat dissipation can be improved.
In this embodiment, the power supply box 26 is formed in a box shape with a bottom, but this is not limited to this. For example, the power supply box 26 can be formed by cutting out a portion of the side plate 26b, or by combining multiple parts.

The power supply box 26 is made of a metal material. In this embodiment, the power supply box 26 is made of aluminum. Metal materials such as aluminum have high thermal conductivity, so by configuring it in this way, a power supply box 26 with high heat dissipation properties is realized. Heat generated from heat-generating components of the power supply board 22 is transferred to the power supply board 22 and the air around it, and then transferred to the power supply box 26. In particular, by placing the bottom plate 26a of the power supply box 26 made of a metal material above the heat-generating components 22a, the heat generated from the heat-generating components 22a is transferred to the power supply box 26 via the air, allowing for efficient heat dissipation.

As shown in Figs. 11 to 13, the power supply box 26 is arranged along the power supply box storage section 21a of the instrument body 21. The power supply box storage section 21a is provided with a wall section 21b that is arranged along a part of the side plate 26b of the power supply box 26. By aligning the side plate 26b with the wall section 21b, the power supply box 26 can be easily stored at a predetermined position in the instrument body 21. The power supply box 26 is provided with through holes 26d, 26d corresponding to the guide tube sections 29, 29 of the instrument body 21. In this embodiment, one of the through holes 26d is provided in the bottom plate 26a, and the other through hole 26d is provided in the step section 26c described later. One of the guide tube sections 29 is arranged inside the power supply box 26 through the through hole 26d provided in the bottom plate 26a. The guide tube section 29 is formed using an insulating resin material and prevents the hook blade 12 arranged in the guide tube section 29 from contacting the power supply box 26. The other guide tube portion 29 is disposed at a position where its opening overlaps with the through hole 26d of the stepped portion 26c in a plan view.
In the present embodiment, the power supply box 26 is positioned in the device body 21 by the power supply box storage section 21 a , a part of the wall section 21 b , and the guide tube section 29 .

As shown in Figures 2, 4 and 5, the end of the side plate 26b on the irradiation surface side protrudes further towards the irradiation surface side than the step portion 26c. The power supply board 22 is positioned so that it abuts the step portion 26c of the power supply box 26 and the open end of the guide tube portion 29 of the device body 21. Therefore, it is positioned closer to the mounting surface side than the end face on the irradiation surface side of the side plate 26b. By configuring it in this way, the power supply board 22 is stored inside the power supply box 26, and the power supply box 26 can efficiently dissipate heat generated from the power supply unit.

As shown in Figures 4 and 5, the module board 24 abuts or is close to the end of the side plate 26b on the side of the irradiation surface. The module board 24 is arranged so as to be separated from the step portion 26c and the power supply board 22. As a result, the module board 24 and the power supply board 22 do not come into contact with each other, so that direct heat conduction between them can be suppressed.

As shown in Figures 6 to 10, the lighting fixture 11 has a locking mechanism 38 that engages with the connection hole of the wiring fixture Cb provided on the mounting portion C to maintain the fitted state between the connection hole of the wiring fixture Cb and the connection blade 12 of the lighting fixture 11.
The locking mechanism 38 has a release button 41, a lock button 42, and a spring 43. The release button 41 is configured to be movable forward and backward from the side surface of the fixture body 21 in the radial direction of the fixture body 21. By pressing the release button 41 toward the inside of the fixture body 21, as shown in Fig. 7, the lock button 42 moves downward and is disposed inside the fixture body 21. This releases the engagement between the connection hole of the wiring fixture Cb and the locking mechanism 38.

The lock button 42 is a button configured to be able to engage with the connection hole of the wiring device Cb provided on the mounting portion C. The spring 43 is configured so that one end abuts against the lock button 42 and the other end abuts against the mounting side of the step portion 26c of the power supply box 26. The spring 43 in this embodiment is formed as a cylindrical compression coil spring. The step portion 26c of the power supply box 26 has a convex portion 26e that protrudes toward the mounting surface side, and the end of the spring 43 on the step portion 26c side abuts against the step portion 26c so that the convex portion 26e is disposed inside. This makes it easy to position the end of the spring 43 on the step portion 26c side, and prevents positional deviation due to the elastic force of the spring 43. A part of the lock mechanism 38 is disposed between the step portion 26c and the upper surface portion 34 of the device body 21. By disposing it in this way, a part of the lock mechanism 38 can be disposed in a position that overlaps with the power supply box 26 in a plan view and a side view. This configuration prevents the locking mechanism 38 from becoming larger in height and width compared to a configuration in which the locking mechanism 38 is arranged so as not to overlap with the power supply box 26. This allows the lighting fixture 11 having the locking mechanism 38 to be made smaller.

The release button 41 has a release side inclined surface 41a at its radially inner end that contacts the inclined surface 42a of the lock button 42 (see FIG. 2). As shown in FIGS. 6 to 8, when the release button 41 is moved radially inward, the lock button 42 is pressed downward in accordance with the movement of the release side inclined surface 41a. Also, as shown in FIGS. 9 and 10, under normal circumstances, the lock button 42 is pressed upward by the elastic force of the spring 43 and is exposed from the upper surface 34 of the instrument body 21. When the operator presses the release button 41 radially inward, as shown in FIGS. 6 and 7, the release button 41 moves radially inward of the instrument body 21 and moves the release button 42 downward against the elastic force of the spring 43. As a result, the release button 42 is in a state where it does not protrude from the upper surface 34 of the instrument body 21 stored in the instrument body 21.

With this configuration, when the release button 41 is not pressed, the elastic force of the spring 43 causes the upper end of the lock button 42 to protrude upward from the upper surface 34 of the fixture body 21. The upper end of the lock button 42 is inserted into the connection hole of the wiring fixture Cb, preventing the connection blade 12 from coming off the wiring fixture Cb. In this way, the lighting fixture 11 is fixed to the mounting portion C so that it cannot be detached from the wiring fixture Cb.

When the release button 41 is pressed radially inward, the lock button 42 moves downward against the elastic force of the spring 43. This causes the upper end of the lock button 42 to be stored inside the fixture body 21. When the upper end of the lock button 42 is released from the connection hole of the wiring fixture Cb, the lighting fixture 11 can be released from the wiring fixture Cb provided on the mounting portion C.

This configuration prevents the lighting fixture 11 from falling off the wiring fixture Cb attached to the mounting portion C. By operating the release button 41, the worker can easily change the lighting fixture 11 from an engaged state with the wiring fixture Cb to an engaged state.

As shown in Figs. 4 to 6, the shade 35 is arranged to cover the light source mounting surface 24a of the module board 24. The shade 35 is attached to the fixture body 21 so as to cover at least the light source mounting surface 24a, and is a translucent member that reflects and diffuses the light emitted from the light source mounting surface 24a (LED element 23) while guiding it, and controls the distribution of the light emitted to the outside of the shade 35. The shade 35 is arranged to face the module board 24, and can guide the light emitted from the light source mounting surface 24a (LED element 23) arranged on the irradiation surface side of the module board 24 and emit it to the outside of the shade 35 as surface emission. The shade 35 is made of a translucent resin material. The shade 35 is subjected to a diffusion treatment. In the shade 35 of this embodiment, a printing layer is formed by silk-screen printing in white (semi-translucent) in a dot pattern on the surface of the irradiation surface side exposed from the opening of the fixture body 21. The shade 35 is not limited to those with a dot pattern printed layer, but can also be made with, for example, those with a printed layer other than a dot pattern, those with a embossed finish (frosted finish) that creates fine irregularities on the surface, those with a diffusing agent mixed inside, or those with a diffuse reflection sheet attached.

According to the lighting fixture 11 of the present embodiment described above, the lighting fixture 11 includes a fixture main body 21 provided with a hook blade 12 that is electrically and mechanically connected to the wiring fixture Cb of the mounting portion C, a power supply board 22 connected to the hook blade 12, a module board 24 on which a plurality of LED elements 23 are arranged, and a shade 35 arranged on the irradiation surface side of the fixture main body 21. The module board 24 has a plurality of LED elements 23 on its light source mounting surface 24a, the LED elements 23 are arranged in an LED arrangement area 24D that includes the center of the light source mounting surface 24a in a planar view, the power supply board 22 is arranged on the side opposite the light source mounting surface 24a of the module board 24 so as to overlap with the module board 24 in a planar view, and the shade 35 is arranged so as to cover the light source mounting surface 24a of the module board 24.
As a result, by arranging the power supply board 22 and the module board 24 on the side opposite the light source mounting surface 24a of the module board 24 so that they overlap, it is possible to provide the LED arrangement area 24D without being affected by the arrangement of the power supply board 22. With this configuration, it is possible to arrange the multiple LED elements 23 entirely on the light source mounting surface 24a of the module board 24, and it is possible to realize a uniform light emitting surface.

Furthermore, in the lighting fixture 11 according to this embodiment, the module substrate 24 is formed using a metal base substrate.
This improves the heat dissipation properties with respect to the heat generated by the LED element 23 .

Furthermore, the lighting fixture 11 according to this embodiment has a power supply box 26 , and the power supply board 22 is disposed within the power supply box 26 .
Thus, by disposing the power supply board 22 inside the power supply box 26, it becomes easy to position the power supply board 22 inside the device body 21. In addition, the heat dissipation property of the power supply box 26 can enhance the heat dissipation property against the heat generated from the heat generating components of the power supply board 22.

Furthermore, in lighting fixture 11 according to the present embodiment, power supply board 22 is disposed closer to the mounting surface than the irradiation surface side end face of side plate 26b of power supply box 26. As a result, power supply board 22 is disposed inside power supply box 26 and is surrounded above and to the sides by power supply box 26, so that the heat dissipation properties of power supply box 26 can be efficiently utilized.
In addition, the power supply board 22 is disposed with a gap provided between it and the module board 24 by the power supply box 26. Since the power supply board 22 and the module board 24 do not contact each other, direct thermal conduction between them can be suppressed with respect to heat generated therefrom. This makes it possible to reduce the conduction of heat generated respectively from the power supply board 22 and the module board 24 to each other.

Furthermore, in the lighting fixture 11 according to this embodiment, the module board 24 has a plurality of LED elements 23 on its light source mounting surface 24a, and the LED elements 23 are arranged in an LED arrangement area 24D including the center of the light source mounting surface 24a in a planar view. The power supply board 22 is arranged on the side opposite the light source mounting surface 24a of the module board 24 so as to overlap with the module board 24 in a planar view, and is provided with a power supply box 26 which is a metallic power supply storage section, and the power supply box 26 covers at least the mounting surface side (upper side) of heat-generating components 22a such as capacitors arranged on the power supply board 22.
As a result, the power supply box 26 covers at least the upper part of the heat generating components arranged on the power supply board 22, thereby improving the heat dissipation performance against the heat generated from the heat generating components 22a of the power supply board 22, etc.

The power supply box 26 is formed in a box shape with a bottom, and the power supply board 22 is disposed inside the power supply box 26 .
This allows the power supply board 22 to be easily arranged inside the power supply box 26, which improves the assembly of the lighting fixture 11 and makes it possible to efficiently utilize the heat dissipation properties of the power supply box 26.

Further, the power supply box 26 has a step portion 26c in a part of the bottom surface on the mounting surface side, which is located closer to the irradiation surface side than other portions.
This makes it possible to easily position the power supply board 22 inside the power supply box 26 by utilizing the step portion 26c.

The fixture body 21 also has a wall portion 21 b that fits along a part of the side plate 26 b of the power supply box 26 .
This allows the power supply box 26 to be disposed along the wall portion 21b, improving the ease of assembly.

11 Lighting equipment 21 Equipment body (main body)
22 Power supply board 22a Heat storage section 23 LED element 24 Module board 24a Light source mounting surface 24D LED arrangement area 26 Power supply box (power supply storage section)
26a Bottom plate 26b Side plate 26c Step portion 30 Engagement claw 31 Engagement groove 32 Cylindrical portion 33 Peripheral end portion 35 Shade 38 Lock mechanism 41 Release button 42 Lock button 43 Spring

Claims (6)

a main body provided with a hook blade that is electrically and mechanically connected to a wiring device of a mounting portion;
A power supply board connected to the hook blade, a module board on which a plurality of LED elements are arranged, and a shade arranged on the irradiation surface side of the main body;
In a lighting fixture comprising:
the module substrate includes a plurality of LED elements on a light source mounting surface, the LED elements being arranged in an LED arrangement region including a central portion of the light source mounting surface in a plan view;
the power supply board is disposed on a surface of the module board opposite a light source mounting surface thereof so as to overlap the module board in a plan view;
Equipped with a metal power supply compartment,
The power supply storage section covers at least the mounting surface side of a heat generating component arranged on a power supply board. The lighting device according to claim 1, wherein the power supply storage section is formed in a box shape with a bottom, and the power supply board is disposed within the power supply storage section. The lighting device according to claim 2, wherein the power supply storage section has a step in a part of the bottom surface on the mounting surface side that is located closer to the irradiation surface side than the other part. The lighting device according to claim 1, wherein the main body has a wall portion that runs along a portion of the side surface of the power supply storage section. It has a locking mechanism,
The lock mechanism includes a release button, a lock button, and a spring.
The lighting device according to claim 1 , wherein one end of the spring abuts against the lock button and the other end of the spring abuts against the power supply storage section. The lighting device according to claim 5, wherein the power supply storage section has a step portion in a part of a bottom surface on the mounting surface side that is positioned closer to the irradiation surface side than other parts, and a part of the locking mechanism is positioned between the step portion and the main body.

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