JP7577161B2 - Power supply and lighting equipment - Google Patents

Description

The present invention relates to a power supply device used in lighting fixtures and the like that are installed in a relatively narrow ceiling space.

For example, in reinforced concrete buildings, high ceilings are preferred to provide a spacious and comfortable living environment. However, because lighting fixtures and other equipment are installed in the ceiling, it is common for ceiling panels to be installed below the bottom of the floor slab (or the bottom of the roof) on the upper floor. Therefore, it is preferable for the ceiling space between the ceiling panel and the bottom of the floor slab (hereinafter referred to as the attic space, a common term) to be narrow, as this allows for a higher ceiling height (height to the ceiling panel) in the living space. However, if the attic space is narrow, it may not be possible to install lighting fixtures there.

Patent Document 1 discloses an improved technology for a separate power supply for lighting fixtures that is installed from the underside of a recessed hole in the ceiling board. When the height from the ceiling board to the upper floor is low and the space above the ceiling is narrow, there is a risk that the power supply unit will hit the bottom of the floor slab or a structure above the ceiling and cannot be inserted, making it impossible to install. Therefore, by constructing the power supply unit from multiple power supply components and bending the power supply unit, it is possible to install lighting fixtures using this power supply unit even in a narrow space above the ceiling.

JP 2019-3894 A

Even if the power supply unit is not as long as the conventional technology described in Patent Document 1, there are cases where it is desirable to install the power supply unit in a narrower space above the ceiling.

The present invention was made in consideration of these problems, and aims to provide a power supply device for lighting fixtures and the like that is suitable for installation in a narrow ceiling space, and a lighting device that uses such a power supply device.

The present invention provides a power supply unit that can be installed on a ceiling board, which is an installation surface, by passing through an embedding hole provided in the ceiling board from below, the power supply unit comprising: a support base having a front leg portion of the support base, a rear leg portion of the support base, and a support base power supply installation portion as an integral part; and a power supply main body having a power supply bottom surface, a power supply top surface, and a power supply front corner surface connecting to the power supply top surface, the bottom surface of the power supply being installed on the upper surface of the support base power supply installation portion, the power supply unit can be installed on the upper surface of the installation surface by the support base front leg portion and the support base front leg portion, the height from the point where the support base front leg portion and the support base power supply installation portion are connected to the installation surface is longer than the height from the point where the support base rear leg portion and the support base power supply installation portion are connected to the installation surface, and the diagonal length of the shape of the power supply main body and the support base combined when viewed from the front, with the side where the power supply unit is inserted into the embedding hole being the front , is longer than the diameter of the embedding hole.
The present invention also provides a power supply device that can be installed on a ceiling board, which is an installation surface, by passing the power supply through an installation hole provided in the ceiling board from below the installation hole, the power supply device comprising: a support base having a support base front leg portion, a support base rear leg portion, and a support base power supply installation portion as an integral part; a power supply main body having a power supply bottom surface, a power supply top surface, and a power supply front corner surface that connects with the power supply top surface; and a terminal block having a terminal block bottom surface and a terminal block side surface, the power supply bottom surface being installed on the top surface of the support base power supply installation portion, and only a portion of the terminal block bottom surface being connected to the top surface of the support base front leg portion. and when the power supply unit is installed on the upper surface of the installation surface by the front legs and the rear legs of the support base, the height from the point where the front legs of the support base and the power supply installation part of the support base are connected to the installation surface is longer than the height from the point where the rear legs of the support base and the power supply installation part of the support base are connected to the installation surface, and when the side where the power supply unit is inserted into the embedding hole is defined as the front, the diagonal length of the shape of the combined power supply main unit and the support base when viewed from the front is longer than the diameter of the embedding hole.

The present invention also provides a lighting device comprising the power supply device and a lighting fixture to be installed in an embedding hole having the diameter , the power supply device being installed in the ceiling board.

With the above-mentioned configuration, the power supply device of the present invention can be installed in the ceiling through the mounting hole in the ceiling board, even in a narrow ceiling space. Therefore, by using the present invention, the ceiling board can be installed at a higher height, ensuring a spacious indoor space.

FIG. 2 is a front view of the lighting fixture and the power supply device according to the first embodiment in an installed state. 1A and 1B are a front view and a top view of a power supply device according to a first embodiment. FIG. 4 is a front view of another power supply device according to the first embodiment. FIG. 4 is a front view of another power supply device according to the first embodiment. 3A and 3B are a front view and a bottom view for explaining installation of the power supply device according to the first embodiment. 11A and 11B are a front view and a top view of a power supply device according to a second embodiment. FIG. 11 is a front view of another power supply device according to the second embodiment. FIG. 11 is a front view of another power supply device according to the second embodiment. 13A and 13B are a front view and a bottom view for explaining installation of a power supply device according to a second embodiment. FIG. 11 is a front view of an installed power supply integrated downlight according to a third embodiment. 13A and 13B are a front view and a bottom view for explaining the installation of a power supply integrated downlight according to a third embodiment. FIG. 13 is a front view of an installed power supply integrated downlight according to a fourth embodiment.

<Embodiment 1>
<Basic configuration>
1 shows a front view of an installed lighting fixture according to a first embodiment of the present invention. A downlight 301 and a power supply unit 340, which is a separate power supply unit not integrated with the lighting fixture, are installed in the ceiling space between a floor slab bottom surface 391 and a ceiling board 392. The downlight 301 is installed in a circular recessed hole 395 provided in the ceiling board 392, and the power supply unit 340 is installed on the ceiling board 392 nearby. An electric light line 385 is inserted into a terminal block 360 of the power supply unit 340, and direct current is applied from the power supply unit 340 to the downlight 301 through a cable 390.

The downlight 301 comprises a frame 305, a cone 310, a COB type LED 320, a heat sink 325, and a mounting spring 330.

The power supply unit 340 must be installed in the ceiling from below the circular recessed hole 395 provided for installing the downlight 301.

First, we considered power supply unit 140, then power supply unit 240 as an improved version, and finally power supply unit 340 as a further improved version. Below, we will explain power supply unit 340, as well as other power supply units.

<Power supply device 340>
2A, which is a front view, the power supply unit 340 includes a power supply main body 350, a terminal block 360, a support block 370, and a wireless module 380. As described below, when the power supply unit 340 is passed through an embedding hole, the left side is the front and the right side is the rear, so that the left side is the front and the right side is the rear.

The power supply unit 340 is 178 mm long, and in the side view (front view) shown in Fig. 2(b), the height (between point B of the support base 370 and the power supply upper surface 355) _Y3 is 53 mm, the length _Z3 is 60 mm, and the diagonal length _D3 is 80 mm (ignoring the chamfering of the corners on the power supply upper surface 355). Since _D3 is 80 mm, it appears that the power supply unit 340 cannot pass through the 75 mm diameter of the embedding hole 395, but since the front shape is not rectangular, it can be passed through by devising the insertion method (described later).

<Power supply unit>
The power supply body 350 has a trapezoidal front shape and includes a power supply front corner surface 351, a power supply rear corner surface 352, a power supply front side surface 353, a power supply rear side surface 354, a power supply top surface 355, and a power supply bottom surface 356. As described below, the provision of the power supply front corner surface 351 and the power supply rear corner surface 352 and the elimination of corners make it easier to insert the power supply device into a narrow space above the ceiling.

A wireless module 380, which is a wireless receiver for output control, is attached to the power supply body 350 (removable). As shown in FIG. 2(b), a cable 390 that outputs power to drive the LED comes out from the power supply body.

<Support stand>
Support base 370 is formed by bending each of the points A-B-C-D-E-F shown in the front view (actually each line because there is depth), and the range from C to D will be called support base power supply installation section 371, the range from A to C will be called support base front leg section 372, and the range from D to F will be called support base rear leg section 373. Note that the bending is not limited to each of the points from B to E, and other bending shapes may be provided, or some may be omitted.

The power supply body 350 is installed on the upper surface of the CD section (support stand power supply installation section 371) of the support stand 370.

As shown in the plan view of FIG. 2(c), the support base 370 has a front leg hole 372H and a rear leg hole 373H, and can be fixed to the ceiling panel 392 by passing a screw through these holes.

<Terminal block>
In front view, the terminal block 360 has a terminal block bottom surface 363 which is a long side and a terminal block side surface 364 which is a short side (the terminal block bottom surface 363 is longer than the terminal block side surface 364). The terminal block 360 is installed so that the terminal block bottom surface 363 overlaps with the support block front leg portion side surface 372S (the BC portion of the support block 370) of the support block front leg portion 372 and the power supply front side surface 353. The distance between B and C of the support block 370 (the length of the support block front leg portion side surface 372S) is longer than the distance between D and E of the support block 370 (the length of the support block front leg portion rear surface 373S). Accordingly, in order to fix the support block 370 to the upper surface of the ceiling board which is the installation surface, the AB portion and the EF portion of the support block 370 are formed to be in a straight line.

The line segment PQ, which is the portion of the bottom surface 363 of the terminal block that contacts the side surface 372S of the front leg of the support block, is longer than the line segment QR of the portion that does not contact the side surface 372S of the front leg of the support block (the portion that contacts or is close to the front side surface 353 of the power supply), and the relationship is line segment PQ > line segment QR. This allows the protrusion amount 361L of the corner 361 of the terminal block 360 (the distance from the line extending from the front corner surface 351 of the power supply main body) to be shortened. In addition, the power supply rotation radius 340L from the midpoint of the bottom surface of the power supply main body 350 to the corner 361 of the terminal block 360 is relatively small. Note that when the power supply shown in FIG. 5 is inserted into the embedding hole, the center of rotation moves on the bottom surface, so the power supply rotation radius is not limited to the distance from the midpoint of the bottom surface, but for the sake of explanation, it is represented by the distance from the midpoint of the bottom surface.

The terminal hole 365 for inserting the electric light cord into the terminal block is provided on the front side in FIG. 2(a). The screw tip 367 for fastening the terminal block 360 to the side surface 372S of the front leg of the support block passes through the front leg of the support block.

<Power supply device 240>
The power supply device 240 is a power supply device 340 in which both legs (the support base front leg 272 and the support base front leg 273) have the same length.

In the side view (front view) of the power supply 240 shown in FIG. 3(b), the length _Y2 is 44 mm, the length _Z2 is 60 mm, and the diagonal length _D2 is 74 mm (ignoring the chamfering of the corners on the power supply top surface 255).

As shown in the front view of FIG. 3(a), the power supply unit 240 includes a power supply body 250, a terminal block 260, a support block 270, and a wireless module 280.

The power supply body 250 has a front corner surface 251 and a rear corner surface 252, and its front shape is trapezoidal. This makes it easy to insert the power supply device into a narrow space above the ceiling.

<Power supply unit>
The power supply body 250 has a trapezoidal front shape, and includes a power supply front corner surface 251, a power supply rear corner surface 252, a power supply front side surface 253, a power supply rear side surface 254, a power supply top surface 255, and a power supply bottom surface 256. As described below, the provision of the power supply front corner surface 251 and the power supply rear corner surface 252 eliminates corners, making it easier to insert the power supply device into a narrow space above the ceiling.

The power supply unit 250 is equipped with a wireless module 280 (removable), which is a wireless receiver for output control.

<Support stand>
Support base 270 is formed by bending each of the points A-B-C-D-E-F shown in the front view (actually each line because there is depth), and the range from C to D will be called support base power supply installation section 271, the range from A to C will be called support base front leg section 272, and the range from D to F will be called support base front leg section 273. Note that the bending is not limited to each of the points from B to E, and other bending shapes may be provided, or some may be omitted.

The power supply body 250 is installed on the upper surface of the support base power supply installation section 271 of the support base 270.

The terminal block 260 is installed so that the bottom surface 263 of the terminal block overlaps with the side surface 272S of the front leg 272 of the support block. The terminal hole 265 for inserting the electric wire 385 into the terminal block is provided on the rear side of the figure. This prevents the electric wire 385 shown in FIG. 1 from coming out to the bottom surface 391 of the floor slab and becoming an obstacle when the power supply unit 240 is inserted into the ceiling. The distance between B and C (the length of the side surface 272S of the front leg of the support block) and the distance between D and E (the length of the side surface 273S of the front leg of the support block) are equal. Alternatively, the line segment PQ on the right side of the figure of the terminal block 260 is the length of the part that contacts the side surface 272S of the front leg of the support block, and the line segment QR is the length of the part that contacts the front side surface 253 of the power supply unit 250, and in the power supply unit 240, the relationship of line segment PQ < line segment QR is satisfied. The protrusion amount 261L of the corner 261 of the terminal block 260 is the distance from a line extending from the power supply front corner surface 251 of the power supply main body. In addition, the power supply rotation radius 240L from the midpoint of the bottom surface of the power supply main body 250 to the corner 261 of the terminal block 260 is slightly longer than the power supply rotation radius 340L of the power supply device 340.

<Terminal block>
In front view, terminal block 260 has terminal block bottom surface 263 which is the long side and terminal block side surface 264 which is the short side. Terminal block bottom surface 263 is installed so as to overlap support base front leg portion side surface 272S (part BC of support base 370) of support base front leg portion 272 and power supply front side surface 253. The distance between B and C of support base 270 (length of support base front leg portion side surface 372S) and the distance between D and E of support base 270 (length of support base front leg portion side surface 273S) are the same.

The line segment PQ, which is the portion of the terminal block bottom surface 263 that contacts the side surface 372S of the front leg of the support block, is longer than the line segment QR of the portion that is not in contact with the side surface 372S of the front leg of the support block (the portion that is in contact with or close to the front side surface 353 of the power supply), so that the relationship is line segment PQ < line segment QR. The protrusion amount 261L of the corner 261 of the terminal block 260 (the distance from the line extending from the front corner surface 251 of the power supply main body) is slightly longer than in the case of the power supply unit 340. The power supply rotation radius 240L from the midpoint of the underside of the power supply main body 250 to the corner 261 of the terminal block 260 is also slightly longer than in the case of the power supply unit 340.

The terminal hole 265 for inserting the electric light cord into the terminal block is provided on the front side in FIG. 3(a).

<Power supply device 140>
The power supply unit 140 has a terminal block 160 disposed on the front leg 172 of the support base.

As shown in the front view of FIG. 4(a), the power supply device 140 includes a power supply body 150, a terminal block 160, a support block 170, and a wireless module 180.

In the side view (front view) of the power supply device 140 shown in FIG. 4(b), the length _Y1 is 44 mm, the length _Z1 is 60 mm, and the diagonal length _D1 is 74 mm (ignoring the chamfering of the corners on the power supply top surface 155).

<Power supply unit>
The power supply main body 150 has a trapezoidal front shape, and includes a power supply front corner surface 151, a power supply rear corner surface 152, a power supply front side surface 153, a power supply rear side surface 154, a power supply top surface 155, and a power supply bottom surface 156. As described below, the provision of the power supply front corner surface 151 and the power supply rear corner surface 152 eliminates corners, making it easier to insert the power supply device into a narrow space above the ceiling.

The power supply unit 150 is equipped with a wireless module 180 (removable), which is a wireless receiver for output control.

<Support stand>
Support base 170 is formed by bending each of the points A-A2-A3-B-C-D-E-F (actually each line because there is depth) shown in the front view, and the range from C to D will be called support base power supply installation section 171, the range from A to C will be called support base front leg section 172, and the range from D to F will be called support base front leg section 173. Note that the bending is not limited to each of the points A2 to E, and other bending shapes may be provided, or some may be omitted.

The power supply body 150 is installed on the upper surface of the CD section (support stand power supply installation section 171) of the support stand 170.

<Terminal block>
In front view, the terminal block 160 has a terminal block bottom surface 163 which is a long side and a terminal block side surface 164 which is a short side. The terminal block side surface 164 is installed so as to overlap with a support base front leg portion side surface 172S (part BC of the support base 170) of the support base front leg portion 172 and the power supply front side surface 153. Since the terminal block bottom surface 163 is fixed to the support base 170 with a screw (screw tip 167 is shown), a step is provided between A2 and A3 in the support base front leg portion 172 to ensure space for the screw tip 167. The sum of the A2-A3 distance and the B-C distance (length of the support base front leg portion side surface 172S) of the support base front leg portion 172 is the same as the D-E distance (length of the support base front leg portion side surface 173S).

The line segment RS, which is the portion of the terminal block side surface 164 that contacts the support block front leg side surface 172S, is longer than the line segment ST of the portion that does not contact the support block front leg side surface 172S (the portion that contacts or is close to the power supply front side surface 153) (depending on the length of the terminal block side surface 164, the line segment RS may be greater than the line segment ST). The projection amount 161L of the corner 161 of the terminal block 160 (the distance from the line extending from the power supply front corner surface 151 of the power supply main body) and the power supply rotation radius 140L from the midpoint of the underside of the power supply main body 150 to the corner 161 of the terminal block 160 are slightly shorter than in the hypothetical example where the terminal block is in the CD section (an example where the line segment RS is zero).

The terminal hole 165 for inserting the electric light cord into the terminal block is provided on the front side in FIG. 3(a).

<Inserting the power supply unit into the ceiling>
5(a1), (a3), and (a4) are front cross-sectional views of the ceiling space to explain the insertion of the power supply unit 340, Fig. 5(a2) is a plan view seen from the bottom of the ceiling space, Fig. 5(b1) and (b3) are front cross-sectional views to explain the insertion of the power supply unit 140 into the same ceiling space, and Fig. 5(b2) is a plan view seen from the bottom of the ceiling space. The ceiling space includes a floor slab bottom surface 391, a ceiling panel 392, and a circular embedding hole 395 (central axis 395A of the circular embedding hole), with the thickness of the ceiling panel = 35 mm, the distance from the top surface of the ceiling panel to the bottom surface of the floor slab = 80 mm, and the diameter of the circular embedding hole = 75 mm.

5 (a3) and (a4) show the recessed hole passing area 396, which is the portion of the recessed hole 395 in the ceiling panel through which the width of the power supply unit 340 passes, with cross-hatched lines. From this, it can be seen that the recessed hole passing area 396 through which the power supply unit 350, which is 60 mm wide, passes is only 44 mm wide, out of the recessed hole diameter of 75 mm.

As shown in Figure 5 (a1), first the power supply unit 340 must be passed through the 75 mm diameter mounting hole 395. However, because the power supply unit 340 is 60 mm wide, 53 mm high, and 80 mm diagonal length, it cannot be passed straight through the mounting hole passing area 396 in the plan view of Figure 5 (a2). Therefore, using the power supply front corner surface 351 of the power supply body, the power supply unit 340 is slightly rotated clockwise in Figure 5 (a1) to pass the support stand front leg 372 up to the top of the ceiling board 392, and then proceed to the step in Figure 5 (a3).

On the other hand, the power supply unit 140 has a width of 60 mm, a height of 44 mm, and a diagonal length of 74 mm, so that it can pass straight through the embedding hole 395 with a diameter of 75 mm, as shown in FIG. 5(b1).

In FIG. 5(a3), the tip of the power supply unit 340 is touching the floor slab bottom surface 391, and the power supply rear corner surface 352 is about to pass through the embedding hole passing area 396 of the embedding hole 395. Then, by rotating the power supply unit 340 counterclockwise as shown in FIG. 5(a4), the power supply rear corner surface 352 can be brought to the upper surface of the ceiling board 392, so that the power supply unit 340 can be passed through the embedding hole 395 and installed in the attic.

Figure 5 (b3) is a diagram explaining the inserted state of the power supply unit 140. When the tip of the power supply unit 140 is in contact with the floor slab bottom surface 391, the power supply rear corner surface 152 is slightly inside the embedding hole passing area 396 of the embedding hole 395. However, even if you try to rotate the power supply unit 140 counterclockwise in this state, the power supply rear corner surface 152 will hit the embedding hole 395 and will not be able to pass through. If the height of the ceiling space is increased beyond 80 mm, it is possible to pass the power supply unit 140 through the embedding hole 395.

Summary of First Embodiment
To sum up, the power supply units 340, 240, and 140 have a trapezoidal shape rather than a rectangular shape when viewed from the front, and the terminal block is located lower than the power supply unit, so that the influence of the corners of the power supply unit and the corners of the terminal block can be reduced when the power supply units are inserted into a narrow ceiling space. The power supply units 340 and 240 can shorten the overall length of the power supply units by placing the bottom surface of the terminal block, which is the long side, on the side of the power supply unit, so that the power supply units can be installed even in a narrow ceiling space. Furthermore, in the power supply unit 340, the front legs of the support base are extended and the terminal block is placed as low as possible, so that the rotation radius of the power supply unit when rotating the power supply unit can be shortened, and it can be inserted into an even narrower ceiling space.

<Embodiment 2>
In the second embodiment, the power supply devices 640, 540, 440 are shaped to have a front corner surface, thereby further shortening the distance from the top surface of the ceiling board 692 to the bottom surface 691 of the floor slab when inserted into the ceiling space in FIG.

<Power supply device 640>
6 has much in common with the power supply unit 340, the same reference numerals as in the power supply unit 340 are used except for the reference numerals relating to the power supply main body 650, and explanations other than for the power supply main body 650 are omitted.

<Power supply unit>
The power supply body 650 has a trapezoidal front shape, and includes a power supply front corner surface 651, a power supply rear corner surface 652, a power supply front side surface 653, a power supply rear side surface 654, a power supply top surface 655, and a power supply bottom surface 656. The provision of the power supply front corner surface 651 and the power supply rear corner surface 652 and the elimination of corners make it easier to insert the power supply device into a narrow space above the ceiling.

Furthermore, the power supply main body is provided with a power supply front corner surface 657 in front view. As a result, the height Y6 of the power supply device 640 (between point B of the support base 370 and the power supply upper surface 655) in front _view is 53 mm, the length _Z6 is 60 mm, and the diagonal length _D6 of the rectangle with the height _Y6 as the vertical and the length _Z6 as the horizontal is 80 mm, while the actual diagonal length _E6 in front view is 67 mm (84% of _D6 ), which is smaller than the embedding hole diameter of 75 mm.

The actual diagonal length _E6 is preferably 90% or less of the diagonal length _D6 , and more preferably 85% or less.

<Power supply device 540>
7 has much in common with the power supply unit 240, the same reference numerals as in the power supply unit 340 are used except for the reference numerals relating to the power supply main body 550, and explanations other than for the power supply main body 550 are omitted.

<Power supply unit>
The power supply body 550 has a trapezoidal front shape, and includes a power supply front corner surface 551, a power supply rear corner surface 552, a power supply front side surface 553, a power supply rear side surface 554, a power supply top surface 555, and a power supply bottom surface 556. The provision of the power supply front corner surface 551 and the power supply rear corner surface 552 and the elimination of corners make it easier to insert the power supply device into a narrow space above the ceiling.

Furthermore, the power supply main body is provided with a power supply front corner surface 557 in front view. As a result, the height _Y5 of the power supply unit 540 in front view is 44 mm, the length _Z5 is 60 mm, and the diagonal length _D5 of a rectangle with the height _Y5 as the vertical and the length _Z5 as the horizontal is 74 mm, whereas the actual diagonal length _E5 of the power supply unit 540 in front view is 60 mm which is smaller than the embedding hole diameter of 75 mm, and _E5 is 81% of the diagonal length _D5 .

<Power supply device 440>
The power supply device 440 shown in FIG. 8 has much in common with the power supply device 140, so the same reference numerals as in the power supply device 140 are used except for the reference numerals relating to the power supply main body 450, and explanations other than for the power supply main body 450 are omitted.

<Power supply unit>
The power supply body 450 has a trapezoidal front shape, and includes a power supply front corner surface 451, a power supply rear corner surface 452, a power supply front side surface 453, a power supply rear side surface 454, a power supply top surface 455, and a power supply bottom surface 456. The provision of the power supply front corner surface 451 and the power supply rear corner surface 452 and the elimination of corners make it easier to insert the power supply device into a narrow space above the ceiling.

Furthermore, the power supply main body is provided with a power supply front corner surface 457 in front view. As a result, the height _Y4 of the power supply unit 440 in front view is 44 mm, the length _Z4 is 60 mm, and the diagonal length _D4 of a rectangle with the height _Y4 as the vertical and the length _Z4 as the horizontal is 74 mm, while the actual diagonal length _E4 of the power supply unit 440 in front view is 60 mm, which is smaller than the embedding hole diameter of 75 mm. _E4 is 81% of the diagonal length _D4 .

<Inserting the power supply unit into the ceiling>
9(a1) and (a3) are front cross-sectional views of the ceiling space to explain the insertion of power supply unit 640, Fig. 9(a2) is a plan view seen from the bottom of the ceiling space, Fig. 9(b1) and (b3) are front cross-sectional views to explain the insertion of power supply unit 440 into the same ceiling space, and Fig. 9(b2) is a plan view seen from the bottom of the ceiling space. The ceiling space includes a floor slab bottom surface 691, a ceiling panel 692, and a circular embedding hole 695, with the central axis 695A of the circular embedding hole also shown.

Here, the ceiling space has a ceiling board 692 with a thickness of 35 mm, a distance from the top of the ceiling board to the bottom surface 691 of the floor slab with a distance of 70 mm (this differs from embodiment 1), and a circular embedding hole 695 with a diameter of 75 mm.

As shown in Fig. 9(a1), first, the power supply unit 640 needs to be passed through a 75 mm diameter embedding hole 695. The power supply unit 640 is 60 mm wide and 53 mm high, but has a power supply front corner surface 657 and an actual diagonal length _E6 in front view of 67 mm, so that the power supply unit can pass straight through the embedding hole passing area 396 in Fig. 9(a2), which is a plan view.

On the other hand, the power supply device 440 has a width of 60 mm and a height of 44 mm, but has a power supply front corner surface 657 and an actual diagonal length _E4 of 60 mm, so that, as shown in FIG. 9(b1), it can pass straight through the embedding hole 395 having a diameter of 75 mm with plenty of room to spare.

In each diagram of Figure 9, the embedding hole passing area 696, which is the portion of the embedding hole 695 in the ceiling panel through which the width of the power supply unit 640 passes, is shown with cross-hatched lines. From this, it can be seen that, of the embedding hole diameter of 75 mm, the embedding hole passing area 696 through which the 60 mm wide power supply unit 650 passes is only 44 mm wide.

In FIG. 9(a3), the tip of the power supply unit 640 is in contact with the floor slab bottom surface 691, and the power supply rear corner surface 652 is about to pass through the embedding hole passing area 696 of the embedding hole 695. By subsequently rotating the power supply unit 640 counterclockwise, the power supply rear corner surface 652 can be brought to the upper surface of the ceiling board 692, and the power supply unit 640 can be installed in the attic.

Figure 9 (b3) is a diagram explaining the state of inserting the power supply unit when the power supply unit 640 is replaced with the power supply unit 440. The tip of the power supply unit 440 is in contact with the floor slab bottom surface 691, and the power supply rear corner surface 452 is about to enter the embedding hole passing area 396 of the embedding hole 695. However, even if you try to rotate the power supply unit 440 counterclockwise in this state, it will hit the embedding hole passing area and will not be able to pass through. Note that if the height of the ceiling is increased beyond 70 mm, it is possible to install the power supply unit 440 in the ceiling.

<Embodiment 3>
<Basic configuration>
10 shows a front view of the installed state of the power supply integrated downlight 700 which is the lighting fixture of this embodiment. The power supply integrated downlight 700, which is composed of a downlight body 701, a power supply body 750, a terminal block 760 and a connecting plate 775, is installed in the ceiling space between the floor slab bottom surface 391 and the ceiling board 392. The downlight body 701 is installed in a circular embedding hole 395 provided in the ceiling board 392, and the power supply body 750 is not installed in the ceiling board 392 (the connecting plate 775 may bend due to its own weight and come into contact with the ceiling board 392). An electric light line 785 is inserted into the terminal block 760, and direct current is applied from the power supply body 750 through the cable 790 to the downlight body 701.

The downlight body 701 includes a frame 705, a cone 710, a COB LED 720, a heat sink 725, and a mounting spring 730.

A connecting plate 775 is fixed to the top surface of the downlight body 701, and the power supply body 750 and terminal block 760 are installed on top of it.

The power supply body 750 has a front corner surface 751, a rear corner surface 752, a front side surface 753, a rear side surface 754, a top surface 755, and a bottom surface 756, and has a trapezoidal front shape. By providing the front corner surface 751 and the rear corner surface 752 and eliminating corners, it is easy to insert the power supply unit into a narrow space above the ceiling.

The power supply body 750 and terminal block 760 (referred to as power supply unit 740) are 53 mm high and 60 mm wide in front view, and have a diagonal length of 80 mm, just like power supply unit 340, but can pass through a circular embedding hole with a diameter of 75 mm, as described below.

The connecting plate 775 is formed by bending point C among B-C-D-E-F, and the range from B to C will be called the connecting plate terminal block section 775BC, the range from C to D the connecting plate power supply section 775CD, the range from D to E the connecting plate relay section 775DE, and the range from E to F the connecting plate downlight section 775EF. In particular, it is preferable that the connecting plate relay section 775DE be made elastic or have a bendable structure so that it can be bent as necessary.

The terminal block 760 is installed so that the lower side of imaginary surface 756V (terminal block bottom surface 763PQ), which is an extension of the power supply bottom surface 756, of the terminal block bottom surface 763 overlaps with the connecting plate terminal block portion 775AB, and the upper side of imaginary surface 756V (terminal block bottom surface 763QR) overlaps with the power supply front side surface 753. A terminal hole 765 for inserting an electric light cord into the terminal block is provided on the rear side of the figure. The length of terminal block bottom surface 763PQ is longer than the length of terminal block bottom surface 763QR, so that line segment PQ > line segment QR. This makes it easier to insert into a narrow ceiling space, as explained for the power supply unit 340.

<Inserting a downlight with integrated power supply into the ceiling>
The installation method of the power supply integrated downlight 700 is similar to that of the power supply unit 340. However, since the power supply body 750 and the downlight body 701 are connected, it is necessary to consider whether the downlight body 701 will hit an obstacle when the power supply body 750 is moved.

Figures 11 (a1), (a3), and (a4) are front cross-sectional views of the ceiling space to explain the insertion of the power supply integrated downlight 700, and Figure 11 (a2) is a plan view of the ceiling space from the underside. The ceiling space includes a floor slab bottom surface 391, a ceiling panel 392, and a circular embedding hole 395, and the central axis 395A of the circular embedding hole is also shown.

The ceiling space shown in the figure has a ceiling panel thickness of 35 mm, a distance from the top of the ceiling panel to the bottom of the floor slab of 80 mm, and a circular recessed hole diameter of 75 mm. In Figures 11 (a1), (a2), and (a3), the recessed hole passing area 396, which is the portion of the recessed hole 395 in the ceiling panel through which the width of the power supply integrated downlight 700 passes, is shown by cross-hatched lines. From this, it can be seen that, of the recessed hole diameter of 75 mm, the width of the recessed hole passing area 396 through which the 60 mm wide power supply main unit 750 passes is only 44 mm.

As shown in FIG. 11(a1), the terminal block 760 and the power supply unit 750 must first be passed through the 75 mm diameter recessed hole 395. However, the dimensions of the terminal block 760 and the power supply unit 750 in front view are 60 mm wide, 53 mm high, and 80 mm diagonal length, so they cannot be passed straight through the recessed hole passing area 396 in the plan view of FIG. 11(a2). Therefore, by using the power supply front corner surface 751 of the power supply unit, the power supply integrated downlight 700 is slightly rotated clockwise in FIG. 11(a1) to pass the support stand front leg 372 up to the top of the ceiling board 392, and then proceed to the step in FIG. 11(a3).

In FIG. 11(a3), the tip of the power supply integrated downlight 700 is touching the floor slab bottom surface 391, and the power supply rear corner surface 352 is about to pass through the embedding hole passing area 396 of the embedding hole 395. Then, by rotating the power supply integrated downlight 700 counterclockwise as shown in FIG. 5(a4), the power supply rear corner surface 352 can be brought to the upper surface of the ceiling board 392, and the power supply integrated downlight 700 can be installed in the ceiling.

In FIG. 11(a4), the power supply integrated downlight 700 is rotated and the downlight body 701 is installed in the recessed hole 395, completing the installation of the power supply integrated downlight 700.

<Embodiment 4>
12 shows a front view of an installed power supply integrated downlight 800 which is a lighting fixture of this embodiment. Some of the components common to the power supply integrated downlight 700 are given the same reference numerals. The power supply integrated downlight 800, which is composed of a downlight body 801, a power supply body 750, a terminal block 760, a fixing plate 876 and a connecting plate 875, is installed in the ceiling space between the floor slab bottom surface 391 and the ceiling board 392.

The downlight body 801 is installed in a circular recessed hole 395 provided in the ceiling board 392, and the power supply body 750 is not installed in the ceiling board 392 (the connecting plate 875 may bend due to its own weight and come into contact with the ceiling board 392). The electric light line 785 is inserted into the terminal block 760, and direct current is applied from the power supply body 750 to the downlight body 801 through the cable 890.

The downlight body 801 includes a frame 805, a cone 810, a COB LED 820, a heat sink 825, and a mounting spring 830.

A connecting plate 875 is fixed to the top surface of the downlight body 801, and the connecting plate 875 is fixed to the rear corner surface 752 of the power supply and the top surface 755 of the power supply.

A fixing plate 876 is provided to fix the terminal block bottom surface 763 and the power supply bottom surface 756.

The power supply unit of the power supply integrated downlight 840 is the same as the power supply unit 740 of the power supply integrated downlight 700, so like the power supply unit 740, it can be passed through a circular recessed hole with a diameter of 75 mm and installed in an attic space with a ceiling panel thickness of 35 mm and a distance from the top surface of the ceiling panel to the bottom surface of the floor slab of 80 mm.

<Modifications and other details>
The above describes an embodiment of a lighting fixture according to the present invention. However, the exemplified power supply device can also be configured as follows, for example, and it goes without saying that the present invention is not limited to the power supply device as shown in the above embodiment.

(1) The power supply unit in the embodiment is a separate power supply for a ceiling-embedded lighting fixture, but the power supply unit of the present invention can be used not only for lighting fixtures, but also for various electrical devices installed on the ceiling, such as speakers, air purifiers, projectors, fans, wireless repeaters, cameras, and air conditioners, and can also be used as a power supply unit for lighting fixtures that integrate these devices with lighting fixtures, such as lighting fixtures with speakers, lighting fixtures with air purifiers, lighting fixtures with projectors, lighting fixtures with fans, and lighting fixtures with cameras.

(2) In the power supply units 240, 340, 540, and 640, the bottom surface of the terminal block does not need to be in contact with the front side of the power supply, and there may be a space between them.

(3) The power supply rotation radius has been explained as the distance from the midpoint of the underside of the power supply body to the corner of the terminal block, but the point that serves as the fulcrum for the rotation of the power supply during installation moves on the underside of the power supply body during installation. For example, in Figure 5 (a1), the fulcrum of rotation is slightly below the midpoint of the underside of the power supply body, and in Figure 5 (a3), the fulcrum of rotation has moved even lower. In other words, using the midpoint of the underside of the power supply as the reference when considering the power supply rotation radius is an example to simplify the explanation, and in reality it is necessary to take into account that the fulcrum of rotation moves.

(4) The shape of the recessed hole in the ceiling panel is not limited to a circle, but may be a square or rectangle.

(5) The front corner surface of the power supply is intended to make the length of the actual diagonal shorter than the diagonal of a virtual rectangle consisting of the vertical and horizontal lengths when viewed from the front, and the length of the actual diagonal is preferably 90% or less of the length of the diagonal of the virtual rectangle, and more preferably 85% or less. Furthermore, when the length of the diagonal of the virtual rectangle is equal to or greater than the diameter of the circular embedding hole, it is preferable that the length of the actual diagonal is less than the diameter of the embedding hole.

(6) The front corner surface, rear corner surface, and front corner surface of the power supply body have been described as flat surfaces, but they may also be curved surfaces.

(7) The power supply device of the present invention receives AC power supplied from an AC lighting line and outputs DC power suitable for driving LEDs, but it may also be an inverter power supply device that outputs high-frequency power, or a lighting device such as a fluorescent lamp ballast.

The above disclosed embodiments are illustrative in all respects and are not intended to be a basis for restrictive interpretation. Therefore, the technical scope of the present invention is not interpreted solely by the above described embodiments, but is defined based on the claims. Furthermore, all modifications within the scope and meaning equivalent to the claims are included.

301 Downlight 305, 705, 805 Frame 310, 710, 810 Cone 320, 720, 820 COB type LED
325, 725, 825 heat sink,
330, 730, 830 Mounting spring 140, 240, 340, 440, 540, 640, 740 Power supply unit 140L, 240L, 340L Power supply rotation radius 150, 250, 350, 450, 550, 650, 750 Power supply main body 151, 251, 351, 451, 551, 651, 751 Power supply front corner surface 152, 252, 352, 452, 552, 652, 752 Power supply rear corner surface 153, 253, 353, 453, 553, 653, 753 Power supply front side surface 154, 254, 354, 454, 554, 654, 754 Power supply rear side surface 155, 255, 355, 455, 555, 655, 755 Power supply top surface 156, 256, 356, 456, 556, 656, 756 Power supply bottom surface 756V Imaginary surface 457, 557, 657 Power supply front corner surface 160, 260, 360, 760 Terminal block 161, 261, 361 Corner portion 161L, 261L, 361L Protrusion amount 163, 263, 363, 763 Terminal block bottom surface 164, 264, 364, 764 Terminal block side surface 165, 265, 365 Terminal hole 167, 367 Screw tip 170, 270, 370 Support block 171, 271, 371 Power supply installation portion of support block 172, 272, 372 Front leg portion of support block 172S, 272S, 372S Side surface of front leg portion of support block 372H Holes 173, 273, 373 in front leg of support base Rear leg 173S, 273S, 373S in rear leg of support base Side surface 373H in rear leg of support base Holes 180, 280, 380 in rear leg of support base Wireless module 385, 785 Light wire 390, 790, 890 Cable 391, 691 Bottom surface of floor slab 392, 692 Ceiling board 395, 695 Recessed hole 396, 696 Recessed hole passing area 395A, 695A Central axis 700, 800 Power supply integrated downlight 701, 801 Downlight body 775, 875 Connecting plate 876 Fixing plate

Claims (3)

A power supply device that can be installed on a ceiling board, which is an installation surface, by passing the power supply device through a mounting hole provided in the ceiling board from below the mounting hole,
A support base having a front leg portion, a rear leg portion, and a power supply installation portion of the support base as an integral unit;
a power supply body including a power supply bottom surface, a power supply top surface, and a power supply front corner surface connected to the power supply top surface;
Equipped with
The bottom surface of the power source is placed on the top surface of the power source placement part of the support base;
When the power supply device is installed on the upper surface of the installation surface by the front leg portion and the rear leg portion of the support base, the height from the point where the front leg portion of the support base and the power supply installation portion of the support base are connected to the installation surface is longer than the height from the point where the rear leg portion of the support base and the power supply installation portion of the support base are connected to the installation surface,
A power supply unit in which the diagonal length of the combined shape of the power supply body and the support base when viewed from the front, with the side where the power supply unit is inserted into the embedding hole being the front , is longer than the diameter of the embedding hole. A power supply device that can be installed on a ceiling board, which is an installation surface, by passing the power supply device through a mounting hole provided in the ceiling board from below the mounting hole,
A support base having a front leg portion, a rear leg portion, and a power supply installation portion of the support base as an integral unit;
a power supply body including a power supply bottom surface, a power supply top surface, and a power supply front corner surface connected to the power supply top surface;
A terminal block having a terminal block bottom surface and a terminal block side surface;
Equipped with
The bottom surface of the power source is placed on the top surface of the power source placement part of the support base;
A part of the bottom surface of the terminal block is placed on the upper surface of the front leg of the support block,
When the power supply device is installed on the upper surface of the installation surface by the front leg portion and the rear leg portion of the support base, the height from the point where the front leg portion of the support base and the power supply installation portion of the support base are connected to the installation surface is longer than the height from the point where the rear leg portion of the support base and the power supply installation portion of the support base are connected to the installation surface,
A power supply unit in which the diagonal length of the combined shape of the power supply body and the support base when viewed from the front, with the side where the power supply unit is inserted into the embedding hole being the front , is longer than the diameter of the embedding hole. A lighting device comprising the power supply device according to claim 1 or 2 and a lighting fixture to be installed in a recessed hole having the diameter, the lighting fixture being driven by the power supply device.