JP5994506B2 - Switching power supply device and lighting device for road light - Google Patents

Description

  The present invention relates to a switching power supply device and a lighting device for a road lamp using the same.

  In an outdoor lighting fixture such as a road lighting fixture, a power supply device that supplies power to a light source is installed outdoors. Then, a discharge lamp, an LED, or the like is adopted as the light source, and a switching power source that is more efficient than a so-called copper-iron coil ballast has been applied as the power source. In a switching power supply device installed outdoors, it is necessary to prevent moisture from entering the electronic circuit board when the humidity is high or condensation occurs. The case has a sealed structure.

  For example, in Patent Document 1, as a power supply device for an outdoor lighting device, a wiring board (6) is housed in a case composed of a base member (3) and a cover member (4) to be fitted, and provided on one end face. The lead wire (8) on the input side is drawn out from the drawn-out portion (9), and the lead wire (8) on the output side is drawn out from the lead-out portion (9) provided on the other end face, so that the case is waterproof as a whole A sealed configuration is disclosed.

JP 2012-155986 A

  By the way, when a power supply device like patent document 1 is installed so that a longitudinal direction may become a vertical direction in the pole of the lighting fixture for road lights, for example, any one wiring drawer | drawing-out part will face upwards. As described above, moisture tends to adhere to or enter the wiring lead-out portion facing upward, and the reliability may be lowered. In addition, in order to ensure reliability, the wiring lead-out portion needs to be highly sealed, which is not preferable in terms of productivity and cost of the power supply device. Therefore, it is preferable that the wiring lead-out portion is disposed only on one end surface facing downward when the case is installed in the lighting fixture.

  Moreover, in the road lighting fixture, since the power supply device is installed in the pole, the case is generally formed in an elongated shape for ease of installation of the power supply device. When the lighting circuit is mounted on the elongated printed board, the input electric wire portion and the output electric wire portion are respectively provided on both ends of the elongated shape in consideration of pattern wiring and component arrangement in the printed board. Therefore, as described above, the input wiring and output wiring connected to both ends of the circuit board should be placed in the case where the wiring lead portion is provided on one end surface while considering the noise characteristics and the insulation distance from the circuit components. The problem is how to arrange them.

  Accordingly, the present invention provides a switching power supply device used in an outdoor lighting fixture such as a road lighting fixture, in order to appropriately accommodate the circuit board and its wiring in a case provided with a wiring lead-out portion on one end surface. It is an object to provide a configuration of

  In the switching power supply device of the present invention, a component group constituting a light source lighting circuit is mounted, an input wiring from an AC power source is connected to one end in the longitudinal direction across the component group, and power is supplied to the light source at the other end. A circuit board to which the output wiring is connected, an insulating sheet that covers the circuit board in the longitudinal direction of the board, and a case that includes the circuit board through the insulating sheet and that has a wiring lead-out portion on an end surface corresponding to one end side. The output wiring is provided between the inner surface of the case and the outer surface of the insulating sheet, and the input wiring and the output wiring are drawn out from the wiring lead-out portion.

Here, the light source may be an LED, and the light source lighting circuit may be an LED lighting circuit that converts an AC input from an AC power source into a DC output and supplies a DC current to the LED.
In addition, the case is composed of a rectangular parallelepiped having a bottom plate portion, a top plate portion, and a side surface portion that delimits the longitudinal direction, and the circuit board is disposed on the bottom plate portion side of the virtual center plane that is equidistant from the bottom plate portion and the top plate portion. The output wiring is preferably provided on the top plate side.
Furthermore, it is preferable that the insulating sheet has a top surface portion facing and close to the top plate portion of the case, and a portion where the output wiring is provided is disposed on a longitudinal edge or surface of the top surface portion.
Furthermore, it is preferable that a groove recessed on the circuit board side is formed along the longitudinal edge of the top surface portion of the insulating sheet, and an output wiring is provided in the groove.
Furthermore, it is preferable that the space defined by the insulating sheet is filled with a filler made of an insulating material.

  The lighting device for a road lamp according to the present invention includes a lamp portion in which a light source is installed, a pole portion in which an upper end is coupled to the lamp portion, a lower end is buried in the ground, and an end surface having a wiring lead-out portion in the pole portion. The above-described switching power supply device is provided facing the side.

It is the schematic of the lighting fixture for road lights by which the switching power supply device of this invention is mounted. It is the elements on larger scale of the lighting fixture for road lights of FIG. It is a bird's-eye view which shows the switching power supply device by the Example of this invention. It is a side view inside the switching power supply device of FIG. It is a front view inside the switching power supply device of FIG. It is a bird's-eye view of the insulating sheet used for the switching power supply device of FIG. It is a circuit diagram of the LED lighting circuit mounted in the switching power supply device of FIG. 3 is a flowchart illustrating a method for manufacturing a switching power supply device of the present invention. It is a front view inside the switching power supply device by the 1st modification. It is a front view inside the switching power supply device by the 2nd modification. It is a front view inside the switching power supply device by the 3rd modification. It is a front view inside the switching power supply device by the 4th modification. It is a figure explaining the switching power supply device of a comparative example. It is a front view inside the switching power supply device of FIG.

  FIG. 1 is a schematic diagram of a lighting device 1 for a road lamp to which the present invention is applied. The road lighting device 1 includes a lamp unit 2, a pole 3, and a switching power supply device 4 (hereinafter referred to as “power supply device 4”). The appearance configuration shown in FIG. 1 is the same as that of a general road lighting fixture. The lamp unit 2 includes an LED module substrate 21 in which LED chips are modularized as a light source, and the LED module substrate 21 irradiates downward through a transparent cover on the lower surface of the lamp unit 2. The pole 3 has a hollow cylindrical shape, the lamp unit 2 is attached to the upper end, and the lower end is buried in the ground. The power supply device 4 is fixed in the pole 3, is supplied with commercial power by input wiring (not shown) from the ground, and supplies DC power to the LED module substrate 21 via output wiring (not shown). The lamp unit 2 can be detached from the pole 3.

  FIG. 2 is a diagram showing the power supply device 4 in FIG. The power supply device 4 is installed with the longitudinal direction of the case 40 as the vertical direction. As will be described in detail later, on the lower surface of the case 40, commercial power is supplied to the power supply device 4 from the input lines 51 and 52, and direct current from the power supply device 4 is supplied to the LED module via the output lines 53 and 54. Supplied to the LED on the substrate 21. The wiring 55 is a ground wire and is grounded to the ground side. In addition, between the input lines 51 and 52 and the commercial power supply, between the output lines 53 and 54 and the LED module substrate, and between the ground line 55 and the grounding part, a relay line and a relay terminal block are appropriately connected. And The order in which the wirings 51 to 55 are arranged does not have to be as illustrated. The case 40 is made of a metal (for example, aluminum) housing.

  3 is a bird's-eye view of the power supply device 4, FIG. 4 is a view of the inside of the power supply device 4 as seen from the longitudinal side, and FIG. 5 is a front view of the inside of the power supply device of FIG. FIG. The power supply device 4 includes a case 40, a circuit board 50 included in the case 40, and an insulating sheet 60 that insulates the circuit board 50 from the inner surface of the case 40. In the present specification, the longitudinal direction (the direction of the arrow in FIG. 4) of the power supply device 4 (case 40) is referred to as the longitudinal direction, and the side from which each wiring is drawn (right side in FIG. 4) is the front, and vice versa ( The left side in FIG.

  3 to 5, the case 40 includes a rectangular parallelepiped having a side surface portion 41, a bottom plate portion 42, a side surface portion 43, a top plate portion 44, a front end surface 45 and a rear end surface 46. Overhanging portions 45 a and 46 a that protrude in the opposite direction with the bottom plate portion 42 interposed therebetween are provided on the front end surface 45 and the rear end surface 46. An insertion member can be inserted into the attachment holes 45b and 46b (not shown) of the overhang portions 45a and 46a, and is used for attachment to the fixed surface. The front end face 45 is provided with a wiring lead portion 45c for drawing each wiring. Accordingly, the power supply device 4 is disposed inside the pole 3 with the front end face 45 facing downward and the rear end face 46 facing upward.

  4 and 5, the circuit board 50 is mounted with a group of components constituting the LED lighting circuit, and input wirings 51 and 52 and a ground wire 55 are connected to the input side end portion with the component group interposed therebetween. Output wirings 53 and 54 are connected to the output side end. When the circuit board 50 is accommodated in the case 40, the input side end corresponds to the front end surface 45, and the output side end corresponds to the rear end surface 46. The component group is covered with the filler 70 on the upper surface of the circuit board 50, and the soldering portions 50s of the components are dotted on the lower surface. Note that the filler 70 may be filled also on the lower surface side of the circuit board 50 to cover the soldering portion 50 s to improve heat dissipation.

  FIG. 6 is a bird's-eye view of the insulating sheet 60. 4 to 6, the insulating sheet 60 includes a side surface portion 61, a bottom surface portion 62, a side surface portion 63, and a top surface portion 64, and extends in the longitudinal direction to cover the circuit board 50. In addition, the side surface portion 61, the bottom surface portion 62, the side surface portion 63, and the top surface portion 64 are disposed in close proximity to the inner surfaces of the side surface portion 41, the bottom plate portion 42, the side surface portion 43, and the top plate portion 44 of the case 40. The insulating sheet 60 is formed by bending a single sheet, and the front end and the rear end defined by the insulating sheet 60 are open. In the developed view of the insulating sheet 60, the side surface portion 61 and the top surface portion 64 are the farthest portions. Therefore, the boundary between the side surface portion 61 and the top surface portion 64 in FIG. 6 is not formed by bending.

  4 to 6, the front end of the insulating sheet 60 is disposed at a position that does not reach the front end surface 45 of the case 40, and the rear end is disposed at a position that substantially matches the inner surface of the rear end surface 46 of the case 40. Is done. The insulating sheet 60 is provided with a groove 65 that is recessed toward the circuit board 50 along the boundary between the side surface portion 63 and the top surface portion 64, that is, along the edge of the top surface portion 64. A notch 65 a is provided on the rear side of the groove 65 so that a space is formed between the inner surface of the rear end surface 46 and the insulating sheet 60.

  The output wirings 53 and 54 are inserted into the notch 65a and the groove 65. That is, the output wirings 53 and 54 reach the notch 65a from the output side end of the circuit board 50 along the rear end surface 46, reach the vicinity of the front end surface 45 through the groove 65, and from the wiring lead-out portion 45c to the case. Pulled out. On the other hand, the input wirings 51 and 52 and the ground wire 55 reach the wiring lead-out portion 45c from the input side end portion of the circuit board 50 at almost the shortest distance and are drawn out therefrom.

  In the present embodiment, the front end of the insulating sheet 60 is disposed at a position that does not reach the front end surface 45 of the case 40, but the front end is substantially the same as the inner surface of the front end surface 45 of the case 40, similar to the rear end. The cutout portion may be formed so that a space is formed between the front end face 45 and the front end face 45.

  4 and 5, the space occupied by the circuit board 50 inside the insulating sheet 60 is filled with a filler 70 made of an insulator (resin), and the filler 70 covers individual circuit components. The filler 70 is intended for heat dissipation design that suppresses the temperature rise of the circuit components in the case 40 having a sealed structure.

  For example, an LED lighting circuit 500 as shown in FIG. 7 is mounted on the circuit board 50. The LED lighting circuit 500 includes a step-down converter that converts alternating current into direct current power. The LED lighting circuit 500 has input terminals T1 and T2, output terminals T3 and T4, and a ground terminal E1. Input lines 51 and 52 are connected to the input terminals T1 and T2, respectively, output lines 53 and 54 are connected to the output terminals T3 and T4, and a ground line 55 is connected to the ground terminal E1. For example, the circuit board 50 is connected to a part of the case 40, for example, the inner surface of the bottom plate portion 42 by screwing or the like at the ground terminal E 1.

  The LED lighting circuit 500 includes an insulating flyback converter, and includes a rectifier circuit 510 (diode bridge), a smoothing capacitor 511, a transformer 512, switching elements 513a and 513b (for example, MOSFET) for switching the primary winding of the transformer 512, and a transformer. A rectifying element 514 (diode) and a smoothing capacitor 515 for rectifying and smoothing the voltage of the secondary winding 512 are provided. In order to improve circuit efficiency, switching elements 513a and 513b made of the same element are connected in parallel. Further, a coupling capacitor 516 that connects the smoothing capacitor 511 and the smoothing capacitor 512 may be connected for stable operation. The PWM control circuit 517 includes a driver IC and the like, and performs PWM control of the switching elements 513a and 513b so that the output current to the LED module substrate 21 becomes a predetermined value. Although FIG. 7 shows an open loop control circuit, a current feedback may be performed by detecting the current flowing through the output line with a resistor or the like. In this embodiment, an insulating flyback converter is employed as the LED lighting circuit 500, but the LED lighting circuit may be composed of a non-insulated step-down chopper circuit or the like.

  The ground terminal E1 is connected to the connection point of the capacitors 501 and 502 connected in series between the input terminals T1 and T2, and the other end of the capacitor 503 whose one end is connected to the node N4 on the output line. Note that the capacitor 503 may be connected between the secondary node N3 or the primary node N1 or N2 of the transformer 512 and the ground terminal E1.

Next, a method for manufacturing the power supply device 4 will be described. FIG. 8 is a flowchart showing a manufacturing process of the power supply device 4.
First, in step S <b> 10, the case main body portion including the side surface portion 41, the bottom plate portion 42, the side surface portion 43, and the top plate portion 44 is extruded.

In step S <b> 20, the circuit board 50 on which the LED lighting circuit 500 and the respective wiring cables (51-55) are mounted is fixed inside the case main body in a state of being included in the insulating sheet 60. In step S20, the output wirings 53 and 54 are inserted into the notches 65a and the grooves 65 of the insulating sheet 60 as described above.
In step S30, the rear end face 46 is fixed to the rear opening end face of the case body by screwing or the like. Note that the order of steps S20 and S30 may be reversed.

  In step S40, the resin filler is injected into the inside from the front opening end face of the case main body. Thereafter, the filler is hardened by drying or the like.

In step S50, the front end surface 45 is fixed to the front opening end surface of the case main body portion by screwing or the like while the wiring cables (51 to 55) from the circuit board 50 are pulled out from the wiring lead-out portion 45c. Thereby, the power supply device 4 is completed. In addition, you may make it perform the waterproofing process of the wiring drawer | drawing-out part 45c as needed.
In steps S30 and S50, the fixing of the front end face 45 and the rear end face 46 to the case main body is not limited to screwing, and may be fixed by other methods such as engagement and adhesion by fitting points.

  As described above, in the present invention, the output wirings 53 and 54 are provided in the groove 65 formed at the boundary between the side surface portion 63 and the top surface portion 64 of the insulating sheet 60, and the outer surface of the insulating sheet 60 and the case 40. Between the inner surfaces of the two. Such a wiring routing configuration has several advantageous effects described below as compared with the power supply device 4 ′ as a comparative example. FIG. 13 is a view of a power supply device 4 ′ of a comparative example, and FIG. 14 is an internal front view thereof, which will be referred to in the following description. In FIG. 13, the filler is omitted for convenience of explanation.

  First, the noise reduction effect can be obtained by the wiring routing configuration of this embodiment (noise reduction effect). When the output wirings 53 and 54 are arranged inside the insulating sheet 60 ′ as in the power supply device 4 ′ of the comparative example, the output wirings 53 and 54 may be routed close to the circuit components. In particular, when the output wirings 53 and 54 are arranged close to circuit components (hereinafter referred to as “high-frequency components”) that operate at a high frequency, such as the switching elements 513a and 513b, the rectifying element 514, and the transformer 512, the output wiring 53 and The switching noise (high frequency noise) is superimposed on the direct current output by 54. As a result, radiation noise from the output wirings 53 and 54 drawn to the outside of the case 40 increases, or depending on the magnitude of the noise, it may cause a failure of the LED, which is a semiconductor. In addition, noise from the high-frequency component is easily placed on the input wirings 51 and 52 adjacent to the output wirings 53 and 54, and the characteristics of the noise terminal voltage or the interference power on the input side are impaired. Furthermore, since the positions of the output wirings 53 and 54 are not constant among the plurality of power supply devices, it is difficult to manage the variation in the noise characteristics.

  On the other hand, as in the present embodiment, the output wirings 53 and 54 are routed between the insulating sheet 60 and the inner surface of the case 40, whereby the separation distance between the output wirings 53 and 54 and the above-described high-frequency component. Is secured. This prevents high-frequency noise from high-frequency components from appearing on the outputs of the output wirings 53 and 54, and eliminates the problem of noise related to the output wirings 53 and 54 that causes a problem in the power supply device 4 'of the comparative example. Can do.

  The noise reduction effect described above can be obtained regardless of the presence or absence of the filler 70. Therefore, the first effect can be obtained by the configuration of the present invention even in a switching power supply in which another heat radiation design (heat radiation fin, external air cooling, etc.) is performed instead of the filler 70.

  Secondly, according to the wiring routing configuration of the present embodiment, there is an effect that the insulating distance or the insulating property is surely ensured (the effect of ensuring the insulating property). Usually, in circuit design, it is necessary to ensure a predetermined insulation distance corresponding to the potential difference between the electric members including the wiring or to interpose an insulating member. Therefore, the output wirings 53 and 54 are routed between the insulating sheet 60 and the inner surface of the case 40, so that the insulation distance between the output wirings 53 and 54 and each circuit component is ensured, or the insulating sheet 60 Insulation is ensured according to the original purpose. In this embodiment, the light source is an LED array, but this effect is particularly advantageous when the light source is a high-pressure discharge lamp. This is because, when the light source is a high-pressure discharge lamp, it is important to secure an insulation distance between the output wiring for outputting a high-pressure pulse to be applied to the high-pressure discharge lamp at startup and other components.

  Thirdly, according to the wiring routing configuration of the present embodiment, the electronic component can be reliably covered and covered with the filler, that is, the heat dissipation material (effect of ensuring heat dissipation). In the configuration of the comparative example shown in FIGS. 13 and 14, it is difficult to manage the positions of the output wirings 53 and 54 with respect to the circuit components, particularly the heat generating components, and the filling material is filled with the output wirings in contact with the circuit components. there is a possibility. In such a case, the filler does not adhere to the circuit component, and the desired heat dissipation effect of the circuit component by the filler cannot be obtained. On the other hand, as in the present embodiment, the output wirings 53 and 54 are routed to the outside of the insulating sheet 60, so that the circuit components are reliably in contact with the filler to be covered and a desired heat radiation design is realized. .

  Fourth, according to the wiring routing configuration of the present embodiment, the output wirings 53 and 54 do not get in the way in the filling material injection process at the time of manufacturing the power supply device 4, and the workability is improved (easy manufacturing). Sex effect). In the configuration of the comparative example shown in FIGS. 13 and 14, the input wirings 51 and 52, the output wirings 53 and 54, and the ground wire 55 exist in the front opening end face of the insulating sheet 60 ′ in the filling material injection process. Therefore, it is necessary to perform the filling material injection work by avoiding these five wires. On the other hand, according to the present embodiment, only the input wires 51 and 52 and the ground wire 55 exist in the front opening end surface of the insulating sheet 60. Since the input wires 51 and 52 and the ground wire 55 are close to the case cross section, and the output wires 53 and 54 are close to the inner surface of the case (in this embodiment, the cross section is above), these wires are obstructive in the filling material injection operation. Never become. As described above, the routing configuration of this embodiment is advantageous also in the manufacturing operation of the power supply device 4.

  Fifth, according to the wiring routing configuration of the present embodiment, none of the wirings 51 to 55 is fixed in the filler. Therefore, in the stage of disposal after the end of the life of the power supply device 4, it becomes easy to separate and collect the wire, which is advantageous in the disposal operation (effect of ease of disposal).

  Although the preferred embodiments of the present invention have been described above, various modifications as described below are possible without departing from the spirit of the present invention. For example, in the said Example, although the groove | channel 65 of the insulating sheet 60 showed the structure formed along the boundary of the side part 63 and the top | upper surface part 64, the form or position of a groove | channel is not restricted to this.

  FIG. 9 is an internal front view of the power supply device 4 according to the first modification. As shown in FIG. 9, a chipped portion 66 is provided along a boundary portion between the side surface portion 63 and the top surface portion 64, and output wirings 53 and 54 are provided in a space formed in the chipped portion 66 and the inner surface of the case 40. Is done. Compared to the case of the above embodiment, the number of folding processes of the insulating sheet 60 is reduced, which is advantageous in production efficiency. However, it should be noted that the output wirings 53 and 54 are not held or fixed by the insulating sheet 60 alone, but are positioned only after the circuit board 50 and the insulating sheet 60 are inserted into the case 40.

  FIG. 10 is an internal front view of the power supply device 4 according to the second modification. As shown in FIG. 10, a V-shaped groove 67 is formed along the longitudinal direction of the top surface portion 64, and output wirings 53 and 54 are provided in the groove 67. By setting the position of the groove 67 in the short direction (left-right direction in FIG. 10) in consideration of the connection position between the output wirings 53 and 54 and the circuit board 50 or the position of the wiring lead-out portion 45c, the output wiring 53 and The in-case distance of 54 can be shortened. Further, the groove 67 is not necessarily parallel to the longitudinal direction (that is, it may not be perpendicular to the open end surface of the insulating sheet 60). Although a rectangular (concave) groove may be used instead of the V-shaped groove, it should be noted that in this case, the number of bending processes of the insulating sheet 60 is increased as compared with the case of the above embodiment.

  FIG. 11 is an internal front view of the power supply device 4 according to the third modification. As shown in FIG. 11, the top surface portion 64 is formed as a V-shaped concave surface 68 along the longitudinal direction, and output wirings 53 and 54 are provided near the deepest portion of the concave surface 68. With this configuration, the number of bending processes of the insulating sheet 60 is reduced as compared with the case of the above-described embodiment and the second modification, which is advantageous in production efficiency. Here, it is possible to give a certain degree of freedom to the location where the output wiring is routed. However, it should be noted that the position of the output wiring is difficult to determine.

  FIG. 12 is an internal front view of the power supply device 4 according to the fourth modification. As shown in FIG. 12, a rectangular groove 69 is formed in the side surface portion 61 along the longitudinal direction, and output wirings 53 and 54 are provided in the groove 69. The groove 69 is closer to the top plate portion 44 than the virtual center plane P at the center of the bottom plate portion 42 and the top plate portion 44 (note that the circuit board 50 is closer to the bottom plate portion 42 than the center plane P). According to this configuration, when the distance between the bottom surface portion 62 and the top surface portion 64 is long (that is, when the circuit board 50 is designed to be relatively tall), the distance in the case of the output wirings 53 and 54 can be shortened. it can. However, it should be noted that the output wirings 53 and 54 may pass near the high-frequency component.

The following can be said by summarizing the above embodiments and modifications.
A portion where the output wirings 53 and 54 are provided is provided at any position between the inner surface of the case 40 and the outer surface of the insulating sheet 60, whereby the above-described second effect (insulating insulation), third The effect (ensuring heat dissipation), the fourth effect (manufacturability) and the fifth effect (easiness of disposal) can be obtained. Further, regarding the first effect (noise reduction), even if the installation position of the output wirings 53 and 54 is not optimal, the installation position of the output wirings 53 and 54 is determined as a predetermined position, so that Variations in noise characteristics among power supply devices can be managed.

  Further, the installed portion of the output wirings 53 and 54 is arranged such that the circuit board 50 is arranged on the side of the bottom plate part 42 from the virtual center plane that is equidistant from the bottom plate part 42 and the top plate part 44, and on the top plate part 44 side. The output wirings 53 and 54 are preferably provided (see the groove 65, the notch 66, the groove 67, the concave surface 68, and the groove 69). With this configuration, the output wirings 53 and 54 are reliably separated from the mounting surface of the circuit board 50, and the first effect can be obtained with certainty. Naturally, the second to fifth effects can also be obtained.

  Furthermore, it is more preferable that the installed portions of the output wirings 53 and 54 are disposed on the longitudinal edge or surface of the top surface portion 64 of the insulating sheet 60 (see the groove 65, the notch portion 66, the groove 67, and the concave surface 68). ). With this configuration, the output wirings 53 and 54 can be arranged at a position farthest from the circuit components (particularly, high-frequency components) on the circuit board 50. Thereby, the first effect described above can be obtained to the maximum. Naturally, the second to fifth effects can also be obtained. Then, as shown in the embodiment, the output wirings 53 and 54 are provided in the groove 65 recessed toward the circuit board 50 along the longitudinal edge of the top surface portion 64 of the insulating sheet 60. Can be realized with a small number of bending processes.

  As described above, the present invention assumes a particularly advantageous configuration in a switching power supply applied to a lighting device for a road lamp using an LED module as a light source. However, the present invention can also be applied to other switching power supply devices in which the light source is a discharge lamp such as a fluorescent lamp or a high-pressure discharge lamp, and a light source lighting circuit suitable for each light source is mounted on the circuit board. Moreover, the effect of this invention can be enjoyed if it is an outdoor lighting fixture installed so that the longitudinal direction of a switching power supply device may become not only the lighting fixture for road lights but a vertical direction.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 for road lights Lamp part 21 LED module board 3 Pole 4 Power supply device (switching power supply device)
40 Case 41, 43 Side surface portion 42 Bottom plate portion 44 Top plate portion 45 Front end surface 45c Wiring lead-out portion 46 Rear end surface 50 Circuit board 51, 52 Input wiring 53, 54 Output wiring 55 Ground wiring 500 LED lighting circuit 60 Insulating sheets 61, 63 Side surface portion 62 Bottom surface portion 64 Top surface portions 65, 67, 69 Groove 65a Notch portion 66 Notch portion 68 Concave surface 70 Filler

Claims (9)

A switching power supply,
A component group constituting the light source lighting circuit is mounted, an input wiring from an AC power source is connected to one end in the longitudinal direction across the component group, and an output wiring for supplying power to the light source is connected to the other end Circuit board,
An insulating sheet that covers the circuit board in the longitudinal direction of the board; and a case that includes the circuit board via the insulating sheet and has a wiring lead-out portion on an end surface corresponding to the one end side;
The output lines are這設between the outer surface of the insulating sheet and the inner surface of the casing, said input lines and output lines is issued can pull on whether we said casing outside the wiring lead-out portion, and the input wiring the wiring It was substantially withdrawn at the shortest distance from the drawer unit, switching power supply.   2. The switching power supply device according to claim 1, wherein the light source includes an LED, and the light source lighting circuit converts an AC input from the AC power source into a DC output and supplies a DC current to the LED. A switching power supply. The switching power supply device according to claim 1 or 2, wherein the case includes a rectangular parallelepiped having a bottom plate part, a top plate part, and a side part that define a longitudinal direction,
A switching power supply apparatus in which the circuit board is disposed on the bottom plate part side of a virtual center plane that is equidistant from the bottom plate part and the top plate part, and the output wiring is provided on the top plate part side.   4. The switching power supply device according to claim 3, wherein the insulating sheet has a top surface portion facing and close to the top plate portion of the case, and a portion where the output wiring is provided is a longitudinal edge of the top surface portion. Or the switching power supply device arrange | positioned on the surface. In the switching power supply device according to claim 4, wherein the insulating sheet has a longitudinal edge grooves recessed on the circuit board side along the of the top surface, the output wiring groove is這設switching Power supply. 5. The switching power supply device according to claim 4, wherein the insulating sheet has a chipped portion recessed on the circuit board side along a boundary portion between the top surface portion and a side surface facing the side surface portion in the vicinity of the case. A switching power supply apparatus in which the output wiring is provided in the notch. In the switching power supply device according to any one of claims 1 or al 6 have the case end surface of the other end, the space defined by the end face of the front Symbol insulating sheet and the other end is filled filler made of an insulating material, the output wiring is這設between the inner surface of the casing and the outer surface of the insulating sheet is configured so as not to be fixed to the filler, switching power supply. A lighting fixture for road lights,
A lamp unit in which the light source is installed,
Upper end coupled to the lamp unit, the pole portion lower end is buried in the ground, and into the pole part, according to claim 1 or et 7 the end face disposed toward the lower side with the wire lead-out portion A lighting device for a road lamp comprising the switching power supply device according to any one of the above. A method of manufacturing a switching power supply device,
(S10) a step of extruding the case main body portion including the bottom plate portion, the side surface portion, and the top plate portion;
(S20) A circuit in which a component group constituting a light source lighting circuit is mounted, an input wiring is connected to one end in the longitudinal direction across the component group, and an output wiring for supplying power to the light source is connected to the other end Fixing the substrate to the inside of the case main body in a state of being included in an insulating sheet and the output wiring being provided between the inner surface of the case main body and the outer surface of the insulating sheet;
(S30) before or after the fixing step (S20), a step of fixing the first end face to the opening end face on the other end side of the case body,
(S40) Injecting a filler made of an insulator into the inside from the opening end face on the one end side of the case body, and solidifying the filler;
(S50) A step of fixing the second end face to the opening end face on the one end side, and fixing the second end face while pulling out the input wiring and the output wiring from the wiring lead-out portion of the second end face. Process and
A manufacturing method comprising:

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