JP7008209B2 - Lighting equipment - Google Patents

Description

The present invention relates to a lighting device, and more particularly to a lighting device in which an inner case containing a power supply device is housed in an outer case.

As a conventional example, the lighting fixture described in Patent Document 1 will be illustrated. The luminaire described in Patent Document 1 includes a housing embedded in the ceiling, a control unit case housed in the housing, a battery, and a power terminal block. The control unit case houses an emergency circuit board that constitutes a charging circuit that charges the battery with a commercial AC power supply supplied via the power terminal block and a boost chopper circuit that lights the light source with the power supplied from the battery. Has been done.

In the emergency circuit board, an insertion mounting component such as a choke coil constituting a boost chopper circuit and a surface mounting component such as a control IC for switching control of a switching element are arranged on one side. The emergency circuit board is housed in the control unit case in an upright position.

Japanese Unexamined Patent Publication No. 2017-16851

By the way, the height of the lighting fixture (lighting device) is high in consideration of the case where the space in the vertical direction on the back side (behind the ceiling or the back of the wall) of the member (ceiling material, wall material, etc.) to which the embedded lighting fixture is attached is small. It is desirable to reduce the size.

An object of the present invention is to provide a lighting device capable of reducing the height dimension.

The lighting device according to one aspect of the present invention is the light source with a light source, a power supply terminal block electrically connected to an external power source via an electric wire, and electric power supplied from the external power source via the power supply terminal block. It is equipped with a lighting device for lighting. The lighting device includes an inner case for accommodating the lighting device, an outer case for accommodating the inner case, and a fixing plate to which the power terminal block is fixed . The lighting device has a circuit board made of a printed wiring board and a plurality of circuit components mounted on the circuit board. The plurality of circuit components include a first-type circuit component mounted on the first surface of the circuit board, and a second-type circuit component that is shorter than the first-type circuit component. The first surface of the circuit board mainly includes a first region in which the first type of circuit component is mounted, and the second type of circuit component rather than the first type circuit component as compared with the first region. It has a second region in which the ratio of the number of mounted pieces is high. The inner case includes a first wall facing a second surface opposite to the first surface of the circuit board, and a second wall standing up along the thickness direction of the circuit board so as to surround the first wall. It has a third wall facing the first region on the first surface of the circuit board. The inner case faces the second region on the first surface of the circuit board, and the distance between the third wall and the first surface of the circuit board is shorter than that of the third wall, and the fixing thereof. It has a support portion that supports the plate . The power terminal block is housed in the outer case and is arranged at a position facing the fourth wall along the thickness direction of the circuit board.

The lighting device of the present invention has an effect that the height dimension can be reduced.

FIG. 1 is a perspective view of a lighting device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the same lighting device. FIG. 3 is a cross-sectional view of the same lighting device. FIG. 4 is a top view of the lighting device in the same lighting device. FIG. 5 shows the lighting device of the same as above, and is a top view in which the outer case is omitted and the inner case is broken. FIG. 6 shows the lighting device of the same as above, and is a perspective view in which the outer case is omitted. FIG. 7 is a circuit configuration diagram of a lighting device in the same lighting device.

The lighting device 1 according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7. In the following description, unless otherwise specified, the front-back, left-right, and up-down directions indicated by the arrows in FIG. 2 are regarded as the front-back, left-right, and up-down directions of the lighting device 1. However, each figure described in the following embodiment is a schematic view, and the ratio of the size and the thickness of each component does not necessarily reflect the actual dimensional ratio. The configuration described in the following embodiments is only an example of the present invention. The present invention is not limited to the following embodiments, and various modifications can be made depending on the design and the like as long as the effects of the present invention can be achieved.

The lighting device 1 of the present embodiment is installed in a building such as a high-rise building or a large commercial facility, and receives power from an emergency power source installed in the building to perform emergency lighting, so-called separate power supply type emergency. Lighting equipment. That is, as shown in FIG. 1, the lighting device 1 is installed in the ceiling material A1 (ceiling) so as to partially embed the embedded holes A11 provided in the ceiling material A1 in the building.

As shown in FIGS. 1 and 2, the lighting device 1 includes a light source block 10, a lighting device 2, an inner case 3 accommodating the lighting device 2, a terminal block 7, a light source block 10, an inner case 3, and terminals. It includes an outer case 6 for accommodating the block 7. The lighting device 1 further includes a cover 83 and a pair of supports 82.

The light source block 10 includes an LED (Light Emitting Diode) 11 as a light source, an LED holder 12 that supports the LED 11, a lens 13, a lens holder 14 that supports the lens 13, a heat sink 15, and a heat dissipation sheet 16. Has (see FIGS. 2 and 3). The LED 11 is, for example, a package type white LED for lighting. However, the light source is not limited to the LED, and may be a solid-state light emitting element other than the LED such as an organic electroluminescence element.

The heat radiating plate 15 has a flat plate portion 150 having a polygonal shape (for example, an octagonal shape) and a pair of fixing portions 151. However, the flat plate portion 150 and the pair of fixing portions 151 are integrally formed of, for example, a plate material made of aluminum or an aluminum alloy. The pair of fixed portions 151 have a quadrangular shape, and are formed so as to project downward from two non-adjacent sides of the plurality of sides of the flat plate portion 150. Further, in each fixing portion 151, a screw hole (female screw 152) penetrates in the thickness direction of each fixing portion 151 (see FIGS. 2 and 3).

An LED holder 12 that supports the LED 11 is attached to the lower surface of the flat plate portion 150. However, the heat dissipation sheet 16 is arranged between the LED 11 and the flat plate portion 150 (see FIG. 3). Therefore, the heat generated by the LED 11 is conducted to the heat radiating plate 15 via the heat radiating sheet 16.

The lens 13 controls the light distribution of the light emitted from the LED 11. The lens 13 is attached to the lower surface of the flat plate portion 150 of the heat sink 15 by the lens holder 14 so as to cover the LED 11. The lens holder 14 is fixed to the flat plate portion 150 by screwing.

The cover 83 is made of a metal material such as aluminum and is formed in a disk shape having a circular window hole 830 in the center (see FIGS. 1 and 3). The light source block 10 is attached to the upper surface of the cover 83. The light source block 10 is attached to the cover 83 by screwing the heat sink 15 to the cover 83 with a plurality of screws in a state where a part of the lens 13 is inserted into the window hole 830.

The terminal block 7 has a power supply terminal block 70, a fixing plate 71, and two electric wires 72. The power terminal block 70 is composed of, for example, a screwless terminal block. This type of screwless terminal block (also called a quick-connect terminal block) is formed in a rectangular parallelepiped shape, and has two pairs of primary side (power supply side) insertion holes 700 and two pairs of secondary side (load side). ) Is provided on one surface (front surface) with the insertion hole 701. That is, the power terminal block 70 can complete the electrical connection with the conductor simply by inserting a conductor (for example, a single copper wire) into the insertion holes 700 and 701, respectively. One conductor of each of the two electric wires 72 on the secondary side is inserted into the insertion hole 701 on the secondary side of the power terminal block 70 (see FIG. 2). In the two pairs of insertion holes 700 on the primary side of the power terminal block 70, a conductor of a pair of electric wires (not shown) to which power is supplied from an emergency power supply and a pair of electric wires for feed wiring (not shown). One conductor each is inserted.

The fixing plate 71 has a first fixing piece 711, a second fixing piece 712, a third fixing piece 713, and a pair of support pieces 714. The first fixed piece 711, the second fixed piece 712, the third fixed piece 713, and the pair of support pieces 714 are integrally formed by a metal plate such as a zinc steel plate.

The first fixed piece 711 is formed in a rectangular shape. The second fixed piece 712 is formed in a shape obtained by dividing an oval into two equal parts along a long axis. The second fixed piece 712 projects rearward from the upper end of the first fixed piece 711.

A screw hole 7120 is provided in the center of the second fixing piece 712 in the longitudinal direction (left-right direction) (see FIG. 2). Further, the second fixing piece 712 is provided with one protrusion 7121 on each side of the screw hole 7120 in the longitudinal direction of the second fixing piece 712. Each protrusion 7121 protrudes above the upper surface of the second fixing piece 712.

The third fixed piece 713 is formed in the shape of an arrow. The third fixed piece 713 projects rearward from the lower end of the first fixed piece 711 (see FIG. 6).

Each of the pair of support pieces 714 is formed in a narrow rectangular shape. Each support piece 714 protrudes downward by one from the left end and the right end at the lower end of the first fixed piece 711 (see FIG. 2).

The power terminal block 70 is fixed to the front surface of the first fixing piece 711. More specifically, in the power terminal block 70, the surface (rear surface) opposite to the surface (front surface) where the insertion holes 700 and 701 are provided is brought into contact with the front surface of the first fixed piece 711, so that the first fixed piece 711 It is screwed to (see Fig. 3).

The outer case 6 is formed by punching and bending a single sheet metal such as a zinc steel plate or a stainless steel plate. As shown in FIGS. 1 to 3, the outer case 6 is formed as a bottomed cylinder having an open lower surface and a long bottom in the vertical direction with the upper portion as the bottom. Square windows 62 are provided on the front surface and the rear surface of the upper portion of the outer case 6, respectively. When the terminal block 7 is housed in the outer case 6, the two pairs of insertion holes 700 of the power terminal block 70 are exposed to the outside of the outer case 6 through the window 62 on the front surface of the outer case 6 (FIG. 1). reference).

The outer case 6 has a polygonal (for example, octagonal) bottom plate 60 and two side plates 61. A circular screw insertion hole 600 and a pair of rectangular positioning holes 601 are provided at the rear end of the bottom plate 60. The screw insertion hole 600 penetrates the center of the bottom plate 60 in the left-right direction in the vertical direction at the rear end portion. A pair of positioning holes 601 are arranged on each of the left and right sides of the screw insertion hole 600 at the rear end of the bottom plate 60, and penetrate the bottom plate 60 in the vertical direction (see FIG. 2). Two protrusions 7121 provided on the second fixing piece 712 of the fixing plate 71 are inserted into each positioning hole 601 one by one from the bottom (see FIG. 2). Then, by inserting each protrusion 7121 into each positioning hole 601 so that the screw insertion hole 600 of the bottom plate 60 and the screw hole 7120 of the second fixing piece 712 of the fixing plate 71 overlap in the bottom plate 60 in the vertical direction. On the other hand, the second fixed piece 712 is positioned. Then, the fixing screw 81 inserted from above into the screw insertion hole 600 of the bottom plate 60 is screwed into the screw hole 7120 of the second fixing piece 712, whereby the bottom plate 60 and the fixing plate 71 (the second fixing piece 712) are fixed. (See FIG. 3).

Each side plate 61 is connected to the bottom plate 60 and constitutes a side portion of the outer case 6. Each side plate 61 has five vertically long rectangular pieces (first piece 611, second piece 612, third piece 613, fourth piece 614, and fifth piece 615). In other words, the outer case 6 has two pieces each of a first piece 611, a second piece 612, a third piece 613, a fourth piece 614, and a fifth piece 615. In each side plate 61, these five pieces 611 to 615 are integrally formed (see FIG. 2).

The upper end of the first piece 611 of one side plate 61 is connected to the left end of the bottom plate 60. Further, the upper end of the first piece 611 of the other side plate 61 is connected to the right end of the bottom plate 60. A support 82 is attached to the first piece 611 of each side plate 61.

The rear end of the second piece 612 and the front end of the first piece 611 are connected. The front end of the third piece 613 and the rear end of the first piece 611 are connected. The fourth piece 614 is connected to the front end of the second piece 612. The fifth piece 615 is connected to the rear end of the third piece 613. A circular screw insertion hole 63 is provided at the lower end of the second piece 612 of the left side plate 61 (see FIG. 2). A circular screw insertion hole is also provided at the lower end of the third piece 613 of the right side plate 61. One mounting screw 80 is inserted into each screw insertion hole 63. The mounting screw 80 inserted into the screw insertion hole 63 is screwed into the female screw 152 provided in the fixing portion 151 of the heat sink 15. That is, in the outer case 6, the second piece 612 of the left side plate 61 and the third piece 613 of the right side plate 61 are screwed to the pair of fixing portions 151 of the heat sink 15 one by one, so that the heat sink 15 It is fixed to.

Here, the fourth piece 614 of each of the left and right side plates 61 is adjacent to each other with a gap 64 interposed therebetween. Similarly, the fifth piece 615 of each of the left and right side plates 61 is also adjacent to each other with a gap 64 in between (see FIG. 2). That is, each side plate 61 can be displaced in the left-right direction by the amount of the gap 64. Therefore, the amount of deformation (distortion amount) of each side plate 61 with respect to the dimensional difference between the outer case 6 and the heat sink 15 is compared with the case where the fourth piece 614 and the fifth piece 615 of each side plate 61 are connected to each other. It can be suppressed.

As shown in FIG. 2, the inner case 3 has an inner case body 4 and an inner case cover 5. The inner case 3 is formed into a substantially hollow square cylinder by connecting the inner case body 4 and the inner case cover 5 in the vertical direction. The inner case body 4 and the inner case cover 5 are preferably formed of a material having electrical insulation, for example, a synthetic resin material such as polypropylene.

The inner case body 4 has a bottom wall (first wall 31) having a polygonal shape (octagonal shape in the illustrated example) and a peripheral wall 40 rising upward from the peripheral edge of the first wall 31 (FIGS. 2 and 3). reference). The circuit board 26 is housed in the inner case body 4. The circuit board 26 has a shape similar to that of the first wall 31, that is, an octagonal printed wiring board. Printed wiring (not shown) is formed on the first surface (upper surface) and the second surface (lower surface) of the circuit board 26, and a plurality of types of circuit components described later are mounted (insertion mounting and surface mounting). .. The space between the second surface of the circuit board 26 and the inner bottom surface of the inner case body 4 (upper surface of the first wall 31) is filled with a synthetic resin having electrical insulation (for example, urethane resin). Is preferable.

The inner case cover 5 is connected to a side wall (second wall 32) that partially surrounds the inner case body 4, a third wall 33 that is connected to the upper end of the second wall 32, and an inner peripheral surface of the second wall 32. It has a fourth wall 34. The third wall 33 is formed to have a shape equivalent to the shape of the rear side when the shape similar to the first wall 31 (octagonal shape) is bisected in the front-rear direction when viewed from the vertical direction. Further, the fourth wall 34 is formed to have a shape equivalent to the shape of the front side when the shape similar to the first wall 31 (octagonal shape) is bisected in the front-rear direction when viewed from the vertical direction.

The fourth wall 34 is located below the third wall 33, and the front end of the third wall 33 and the rear end of the fourth wall 34 are connected by a vertical wall 51 along the vertical direction. The left and right ends of the vertical wall 51 are connected to the second wall 32. The second wall 32 does not exist above the left and right ends of the fourth wall 34. That is, the inner case cover 5 is open in the upward direction and the left-right direction of the fourth wall 34.

The inner case cover 5 further has a fifth wall 35 and a pair of support portions 50. The fifth wall 35 projects upward from the right rear side of the fourth wall 34 and so as to be parallel to the fourth wall 34. The fifth wall 35 is formed in a substantially square shape when viewed from the vertical direction. The peripheral edge of the fifth wall 35 is connected to the fourth wall 34 and the second wall 32.

The pair of support portions 50 are formed in an L shape when viewed from the vertical direction (see FIGS. 5 and 6). The pair of support portions 50 are formed so as to project forward from each of the left end and the right end of the vertical wall 51 and face the vertical wall 51 with a gap in the front-rear direction. That is, the pair of support portions 50 are configured to support each support piece 714 in a state where the pair of support pieces 714 of the fixing plate 71 are housed in the gap between the fixing plate 71 and the vertical wall 51 (see FIG. 6). ..

The inner case 3 is configured by connecting the inner case body 4 and the inner case cover 5 in the vertical direction. In the lighting device 1 of the present embodiment, the peripheral wall 40 of the inner case body 4 and the second wall 32 of the inner case cover 5 form the first wall 31 of the inner case 3 (the bottom wall of the inner case body 4). Corresponds to the surrounding second wall. However, the inner case 3 may be configured so as to surround the periphery of the first wall 31 with only the inner case cover 5.

Next, the circuit configuration of the lighting device 2 will be described with reference to the circuit diagram of FIG. The lighting device 2 includes a converter circuit 20, a control circuit 21, a control power supply circuit 22, a rectifier circuit 23, an output connector 24, a pair of input terminals 25, and the like.

The pair of input terminals 25 have, for example, a through hole (not shown) penetrating the circuit board 26 from the first surface to the second surface and a land formed around the through hole on the second surface of the circuit board 26. Each has. At each input terminal 25, wiring formed on the second surface of the circuit board 26 by soldering the conductor of the electric wire 72 inserted from the first surface to the second surface of the circuit board 26 to the land. It is electrically connected to the conductor for.

One end of the fuse F1 is electrically connected to one of the input terminals 25. One end of the first surge absorber ZNR1 and one end of the capacitor C1 are electrically connected to the other end of the fuse F1. Further, the other end of the first surge absorber ZNR1 and the other end of the capacitor C1 are electrically connected to the other input terminal 25. The capacitor C1 is, for example, a film capacitor.

The rectifier circuit 23 is composed of, for example, a diode bridge. A pair of input terminals of the rectifier circuit 23 are electrically connected to both ends of the capacitor C1. The first inductor L1 and the capacitor C2 are electrically connected in series to the pair of output terminals of the rectifier circuit 23.

The converter circuit 20 is composed of, for example, a back boost converter (boost boost chopper) circuit. However, the converter circuit 20 may be composed of a step-up chopper circuit, a step-down chopper circuit, or the like. The converter circuit 20 has a switch element Q1 made of an N-channel enhancement type MOSFET (metal-oxide-semiconductor field-effect transistor). The converter circuit 20 further includes a second inductor L2, a diode D1, and an output capacitor C3. The output capacitor C3 is composed of, for example, an aluminum niu electrolytic capacitor. The second inductor L2 is composed of a choke coil with a core.

The drain of the switch element Q1 is electrically connected to one end of the second inductor L2. The source of the switch element Q1 is electrically connected to the connection point between the first inductor L1 and the capacitor C2. A resistor R14 is electrically connected between the gate and the source of the switch element Q1. The other end of the second inductor L2 is electrically connected to the output terminal on the low potential side of the rectifier circuit 23 and the terminal on the high potential side of the output capacitor C3. The terminal on the low potential side of the output capacitor C3 is electrically connected to the anode of the diode D1. The cathode of the diode D1 is electrically connected to the source of the switch element Q1 via the resistor R4. Both ends of the output capacitor C3 are electrically connected to the output connector 24. The output connector 24 has two contacts, one contact is electrically connected to the high potential side terminal of the output capacitor C3 and the other contact is electrically connected to the low potential side terminal of the output capacitor C3. It is connected to the.

The control circuit 21 is configured to switch and control the switch element Q1 of the converter circuit 20. The control circuit 21 has a power supply voltage input terminal (VCC), a gate drive output terminal (OUT), a ground terminal (GND), a zero current detection input terminal (CS), and an error amplifier input terminal (FB). The control circuit 21 operates when a control power supply voltage having a predetermined voltage value is supplied from the control power supply circuit 22 to the power supply voltage input terminal (VCC). The control circuit 21 stops when a control power supply voltage having a predetermined voltage value is not supplied to the power supply voltage input terminal (VCC). In the control circuit 21, when the control power supply voltage input to the power supply voltage input terminal (VCC) exceeds a predetermined voltage value, switching of the switch element Q1 is started. Further, when the power supply voltage input terminal (VCC) is short-circuited with the ground terminal (GND) and drops to the ground level, the switching of the switch element Q1 is stopped. Further, the control circuit 21 switches and controls the switch element Q1 of the converter circuit 20, for example, in the current critical mode. The current critical mode is a control method in which the switch element Q1 is turned on again when the regenerative current flowing from the second inductor L2 to the output capacitor C3 becomes zero while the switch element Q1 is turned off. The voltage across the resistor R4 is input as the detection value of the regenerative current to the zero current detection input terminal (CS) of the control circuit 21. However, since the control method of such a current critical mode is well known in the past, detailed description thereof will be omitted. The control circuit 21 is preferably composed of a general-purpose integrated circuit. As such an integrated circuit, for example, a control IC for LED lighting (model number: R2A20134) manufactured by Renesas Electronics Corporation is suitable. However, since such a control circuit 21 is well known in the past, detailed circuit configuration and operation are not shown and described.

The control power supply circuit 22 is configured to generate a control power supply voltage of the control circuit 21 from DC power supplied from an emergency power supply such as a storage battery.

The control power supply circuit 22 has at least two diodes D2, D3, three resistors R1, R2, R3, a capacitor C4 composed of an electrolytic capacitor, and a Zener diode ZD1. The anode of the diode D2 is electrically connected to the connection point between the first inductor L1 and the capacitor C2. The cathode of the diode D2 is electrically connected to one end of the resistor R1. The other end of the resistor R1 is electrically connected to the terminal on the high potential side of the capacitor C4. The terminal on the high potential side of the capacitor C4 is electrically connected to the cathode of the Zener diode ZD1. The terminal on the low potential side of the capacitor C4 is electrically connected to the anode of the Zener diode ZD1. That is, the Zener diode ZD1 is electrically connected in parallel to the capacitor C4. The anode of the diode D3 is electrically connected to the terminal on the high potential side of the output capacitor C3. The cathode of the diode D3 is electrically connected to one end of the resistor R3. The other end of the resistor R3 is electrically connected to the terminal on the high potential side of the capacitor C4. The anode of the Zener diode ZD1 is electrically connected to the ground terminal (GND) of the control circuit 21. The cathode of the Zener diode ZD1 is electrically connected to the power supply voltage input terminal (VCC) of the control circuit 21.

In the control power supply circuit 22, during the period until the output voltage of the converter circuit 20 stabilizes, the charging voltage of the capacitor C4 charged from the emergency power supply via the diode D2 is constantized by the Zener diode ZD1 to control the power supply voltage. Is configured to generate. Further, in the control power supply circuit 22, after the output voltage of the converter circuit 20 is stabilized, the charging voltage of the capacitor C4, which is charged by the output voltage of the converter circuit 20 via the diode D3, is converted to a constant voltage by the Zener diode ZD1. It is configured to generate a control power supply voltage.

Here, among the various circuit components constituting the lighting device 2, the relatively tall circuit components are referred to as the first type circuit components, and the circuit components shorter than the first type circuit components are the second type. Sometimes referred to as a type of circuit component. The second type of circuit components include the chip resistor that constitutes the resistor R1, ..., the surface mount type LED lighting control IC that constitutes the control circuit 21, and the two surface mount type surge absorbers ZNR1. , ZNR2 is included. Further, the second type of circuit component includes a surface mount diode bridge constituting the rectifier circuit 23 and a surface mount MOSFET constituting the switch element Q1. On the other hand, the first type of circuit component includes a film capacitor constituting the capacitor C1, an aluminum electrolytic capacitor constituting the output capacitor C3, and an electrolytic capacitor constituting the smoothing capacitor C4. Further, the first type of circuit component includes a cylindrical inductor constituting the first inductor L1, an inductor with a core constituting the second inductor L2, and a fuse F1 with a lead terminal.

In the present embodiment, only the second type of circuit components (for example, the rectifier circuit 23, the switch element Q1, etc.) are mounted on the second surface (lower surface) of the circuit board 26. On the other hand, on the first surface (upper surface) of the circuit board 26, the first type circuit component and the second type circuit component are mounted in a mixed manner. However, on the first surface of the circuit board 26, a first region S1 in which the first type of circuit component is mainly mounted, and a second type of circuit component than the first type circuit component as compared with the first region S1. There is a second region S2 in which the ratio of the number of mounted is high (see FIG. 4). The first region S1 is a region behind the virtual straight line X1 that substantially bisects the first surface of the circuit board 26 in the front-rear direction. Further, the second region S2 is a region in front of the straight line X1 (see FIG. 4).

A capacitor C1, an output capacitor C3, a fuse F1, and a first inductor L1 are mounted as first-class circuit components in the first region S1 on the first surface of the circuit board 26. Further, two surge absorbers ZNR1 and ZNR2 are mounted as second type circuit components in the first region S1 on the first surface of the circuit board 26. On the other hand, a second inductor L2, a smoothing capacitor C4, and an output connector 24 are mounted as first-class circuit components in the second region S2 on the first surface of the circuit board 26. Further, in the second region S2 on the first surface of the circuit board 26, as a second type of circuit component, a control circuit 21, a resistor R1, ..., A chip resistor (not shown) and the like are mounted. ..

When the lighting device 2 is housed in the inner case 3, the first region S1 of the circuit board 26 overlaps with the third wall 33 of the inner case 3 and the second region S2 of the circuit board 26 is inside when viewed from above. It overlaps with the fourth wall 34 of the case 3 (see FIGS. 2, 3 and 5). Therefore, the height (distance in the vertical direction; the same applies hereinafter) from the first wall 31 to the third wall 33 of the inner case 3 is the tallest of the first type circuit components existing in the first region S1. It suffices if it is taller than the height of a tall circuit component (output capacitor C3). On the other hand, the height from the first wall 31 to the fourth wall 34 of the inner case 3 may be higher than the height of the tallest circuit component among the circuit components existing in the second region S2. Here, since the first type of circuit component is also mounted in the second region S2 of the circuit board 26, the tallest circuit component among the circuit components existing in the second region S2 is the first type circuit. It is a component (second inductor L2 in this embodiment). Therefore, originally, the height from the first wall 31 to the fourth wall 34 of the inner case 3 must be higher than the height of the second inductor L2. However, the inner case 3 in the present embodiment has a fifth wall 35 above the second inductor L2 whose height from the first wall 31 is higher than the height of the height of the second inductor L2 (FIG. 3). And FIG. 5). That is, since the inner case 3 has the fifth wall 35 on the second inductor L2, the height of the fourth wall 34 can be made lower than the height of the fifth wall 35.

Next, the assembly procedure of the lighting device 1 will be described. First, the worker who performs the assembly work attaches the light source block 10 to the upper surface of the cover 83 by screwing it (see FIG. 2). Subsequently, the operator attaches the inner case body 4 accommodating the lighting device 2 (circuit board 26) by screwing it to the heat radiating plate 15. After that, the operator joins the inner case cover 5 to the inner case body 4 to assemble the inner case 3. At this time, the operator inserts the two electric wires 72 drawn from the first surface of the circuit board 26 into the grooves 36 provided at the left ends of the second wall 32 and the fourth wall 34 of the inner case 3. Then, two electric wires 72 are pulled out on the fourth wall 34 (see FIG. 2). Then, the operator inserts the conductors of the two electric wires 72 into the insertion hole 701 of the power supply terminal block 70, and connects the two electric wires 72 to the power supply terminal block 70.

Subsequently, the operator attaches the fixing plate 71 to the power terminal block 70 by screwing it. The operator inserts the pair of support pieces 714 of the fixing plate 71 into the gap between the pair of support portions 50 of the inner case 3 and the vertical wall 51 from above, and causes the fixing plate 71 to be supported by the pair of support portions 50. .. Here, the operator has one pair of locking claws 37 protruding upward from the third wall 33 of the inner case 3 in the pair of through holes 7130 provided in the third fixing piece 713 of the fixing plate 71. Insert one by one. Each locking claw 37 is hooked on a peripheral portion of each through hole 7130 on the upper surface of the third fixing piece 713. As a result, the fixing plate 71 is locked to the pair of locking claws 37 and temporarily fixed to the inner case 3.

Next, the operator covers the outer case 6 from the top of the inner case 3, and inserts one mounting screw 80 into each of the two screw insertion holes 63 of the outer case 6 to the female screw 152 of the fixing portion 151 of the heat sink 15. Screw in. At this time, since the support piece 714 of the fixing plate 71 is supported by the pair of support portions 50 and the fixing plate 71 is temporarily fixed to the inner case 3, the work of screwing the fixing plate 71 and the outer case 6 is performed. It is possible to improve the sex.

Finally, the operator inserts the fixing screw 81 into the screw insertion hole 600 of the bottom plate 60 from above and screws the fixing screw 81 into the screw hole 7120 of the second fixing piece 712, whereby the bottom plate 60 and the fixing plate 71 (the second fixing piece 712) are screwed into the screw hole 7120. ) And are fixed with the fixing screw 81. The assembly work of the lighting device 1 is completed by the above procedure.

In the lighting device 1 assembled as described above, the power terminal block 70 is arranged on the fourth wall 34 and the fifth wall 35 of the inner case 3 (see FIG. 3). Therefore, the lighting device 1 has a height dimension (lower) by suppressing (lowering) the height of the outer case 6 as compared with the case where the power terminal block 70 is arranged on the third wall 33 of the inner case 3. It is possible to reduce the size (dimensions in the vertical direction).

By the way, in the lighting device 1, two pairs of insertion holes 700 of the power supply terminal block 70 housed in the outer case 6 are exposed to the outside of the outer case 6 through the window 62 on the front surface of the outer case 6 (FIG. FIG. See 1). Moreover, the power supply terminal block 70 is substantially parallel to the front-rear direction (horizontal direction) in the direction in which the conductor of the electric wire is inserted into each insertion hole 700 (the direction perpendicular to the surface through which the insertion hole 700 of the power supply terminal block 70 opens). It is housed in the outer case 6 so as to be allowed to do so. Therefore, it is possible to prevent foreign matter such as dust from entering the inside of the power supply terminal block 70 through the insertion holes 700 and 701. Further, when the space behind the ceiling (particularly the space in the height direction) is small, the electric wire inserted into the insertion hole 700 of the power terminal block 70 is moved horizontally (parallel to the ceiling material A1) from the power terminal block 70. Can be pulled out. For example, when the conductor of the electric wire is inserted upward or downward, the electric wire connected to the power terminal block 70 needs to be bent at an angle close to 90 °, and the wiring work of the electric wire to the power terminal block 70 is performed. Workability may decrease. On the other hand, in the lighting device 1 of the present embodiment, the power terminal block 70 is housed in the outer case 6 so that the direction in which the conductor of the electric wire is inserted into each insertion hole 700 is substantially parallel to the horizontal direction. It is possible to improve the workability of the wire connection work to the table 70.

As described above, the lighting device (1) according to the first aspect of the present invention includes a light source (LED11), a power supply terminal block (70) electrically connected to an external power source via an electric wire, and a power supply terminal block. It is provided with a lighting device (2) for lighting a light source with electric power supplied from an external power source via (70). The lighting device (1) according to the first aspect includes an inner case (3) for accommodating the lighting device (2) and an outer case (6) for accommodating the inner case (3). The lighting device (2) has a circuit board (26) made of a printed wiring board and a plurality of circuit components mounted on the circuit board (26). The plurality of circuit components include a first-class circuit component mounted on the first surface of the circuit board (26) and a second-class circuit component that is shorter than the first-class circuit component. The first surface of the circuit board (26) is mainly a first region (S1) on which the first type of circuit component is mounted, and a second type than the first type circuit component as compared with the first region (S1). It has a second region (S2) in which the ratio of the number of circuit components mounted on the above is high. The inner case (3) has a first wall (31) facing the second surface opposite to the first surface of the circuit board (26), and the first wall (31) so as to surround the first wall (31). It has a second wall (32) that stands up along the thickness direction. The inner case (3) has a third wall (33) facing the first region (S1) on the first surface of the circuit board (26) and a second region (S2) on the first surface of the circuit board (26). It has a fourth wall (34) facing the third wall (33) and having a shorter distance from the first surface of the circuit board (26) than the third wall (33). The power terminal block (70) is arranged at a position facing the fourth wall (34) along the thickness direction of the first wall (31).

The lighting device (1) according to the first aspect is the distance between the third wall (33) and the fourth wall (34) along the thickness direction of the first wall (31) from the first wall (31). The height dimension can be reduced according to the difference.

The lighting device (1) according to the second aspect of the present invention can be realized in combination with the first aspect. In the lighting device (1) according to the second aspect, the inner case (3) is preferably made of a material having electrical insulation.

Since the lighting device (1) according to the second aspect does not need to consider the electrical insulation between the circuit board (26) and the circuit component and the inner case (3), the degree of freedom in designing the inner case (3) Can be improved.

The lighting device (1) according to the third aspect of the present invention can be realized in combination with the first or second aspect. In the lighting device (1) according to the third aspect, it is preferable that the outer case (6) is made of a non-combustible material.

The lighting device (1) according to the third aspect can be used for emergency lighting because the outer case (6) is made of a non-combustible material.

The lighting device (1) according to the fourth aspect of the present invention can be realized by combining with any one of the first to third aspects. In the lighting device (1) according to the fourth aspect, the lighting device (2) is a converter circuit (2) having at least a semiconductor switch element (switch element Q1), an inductor (second inductor L2), and an electrolytic capacitor (output capacitor C3). 20) is provided. The first type of circuit component preferably includes at least a second inductor L2 and an output capacitor C3.

Since the lighting device (1) according to the fourth aspect includes tall circuit components such as an inductor and an electrolytic capacitor in the first type of circuit components, the height dimension can be further reduced.

The lighting device (1) according to the fifth aspect of the present invention can be realized by combining with any one of the first to fourth aspects. In the lighting device (1) according to the fifth aspect, the inner case (3) is a circuit component of the first type mounted in the second region (S2) along the thickness direction of the first wall (31). It is preferable to have a fifth wall (35) facing the surface.

The lighting device (1) according to the fifth aspect has a height dimension that suppresses an increase in the distance of the fourth wall (34) from the first wall (31) along the thickness direction of the first wall (31). Further miniaturization can be achieved.

The lighting device (1) according to the sixth aspect of the present invention can be realized by a combination with any one of the first to fifth aspects. In the lighting device (1) according to the sixth aspect, it is preferable that the power terminal block (70) is housed in the outer case (6).

The lighting device (1) according to the sixth aspect can suppress the adhesion of foreign matter to the power supply terminal block (70).

The lighting device (1) according to the seventh aspect of the present invention can be realized in combination with the sixth aspect. In the lighting device (1) according to the seventh aspect, it is preferable to provide a fixing plate (71) to which the power supply terminal block (70) is fixed. The inner case (3) preferably has a support portion (50) that supports the fixing plate (71).

In the lighting device (1) according to the seventh aspect, since the fixing plate (71) is supported by the inner case (3) by the support portion (50), the power terminal block (70) is temporarily attached to the inner case (3). By holding it, the workability of the assembly work can be improved.

The lighting device (1) according to the eighth aspect of the present invention can be realized in combination with the seventh aspect. In the lighting device (1) according to the eighth aspect, the power supply terminal block (70) is preferably a screwless terminal block having an insertion hole (700) into which a conductor of an electric wire is inserted. It is preferable that the fixing plate (71) has a power supply terminal block (70) fixed so that the insertion direction of the conductor with respect to the insertion hole (700) is parallel to the thickness direction of the second wall (32).

When the lighting device (1) according to the eighth aspect is installed so that the thickness direction of the second wall (32) of the inner case (3) is substantially parallel to the horizontal direction, the electric wire to the power terminal block (70) is provided. It is possible to improve the workability of the connection work.

1 Lighting device 2 Lighting device 3 Inner case 6 Outer case 11 LED (light source)
26 Circuit board 31 1st wall 32 2nd wall 33 3rd wall 34 4th wall 35 5th wall 50 Support 70 Power terminal block 71 Fixed plate 700 Insert hole Q1 Semiconductor switch element L2 2nd inductor (inductor)
C3 output capacitor (electrolytic capacitor)
S1 1st area S2 2nd area

Claims (6)

Light source and
A power terminal block that is electrically connected to an external power supply via an electric wire,
A lighting device that lights the light source with electric power supplied from the external power source via the power terminal block, and a lighting device.
An inner case for accommodating the lighting device and
With the outer case that houses the inner case
A fixing plate to which the power terminal block is fixed and
Equipped with
The lighting device is
A circuit board consisting of a printed wiring board and
It has a plurality of circuit components mounted on the circuit board, and has a plurality of circuit components.
The plurality of circuit components are
The first type of circuit component mounted on the first surface of the circuit board, and
Including the second type circuit component which is shorter than the first type circuit component.
The first surface of the circuit board is
The first region in which the first type of circuit component is mainly mounted, and
It has a second region in which the ratio of the number of the second type circuit components mounted is higher than that of the first type circuit component as compared with the first region.
The inner case is
A first wall of the circuit board facing a second surface opposite to the first surface,
A second wall that stands up along the thickness direction of the circuit board so as to surround the first wall,
A third wall facing the first region on the first surface of the circuit board,
A fourth wall facing the second region on the first surface of the circuit board and having a shorter distance from the first surface of the circuit board than the third wall .
A support portion that supports the fixing plate and
Have,
The power terminal block is housed in the outer case and is arranged at a position facing the fourth wall along the thickness direction of the circuit board.
Lighting equipment. The inner case is made of a material having electrical insulation.
The lighting device according to claim 1. The outer case is made of incombustible material,
The lighting device according to claim 1 or 2. The lighting device comprises a converter circuit having at least a semiconductor switch element, a choke coil and an electrolytic capacitor.
The first type circuit component includes at least the choke coil and the electrolytic capacitor.
The lighting device according to any one of claims 1 to 3. The inner case has a fifth wall facing the first type of circuit component mounted in the second region along the thickness direction of the circuit board.
The lighting device according to any one of claims 1 to 4. The power terminal block is a screwless terminal block having an insertion hole into which the conductor of the electric wire is inserted.
The power terminal block is fixed to the fixing plate so that the insertion direction of the conductor with respect to the insertion hole is parallel to the thickness direction of the second wall.
The lighting device according to any one of claims 1 to 5 .

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