JP2011096887A - Power supply device and luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply device in which folding of a locking claw locking a circuit board is easily performed and backlash of the circuit board can be suppressed, and to provide a luminaire including the power supply device. <P>SOLUTION: A power supply device 1 includes a circuit board 2 and a case 3 having a bottom plate 5, a pair of rising parts 6, 6 formed on both sides of the bottom plate 5 in the longitudinal direction, projections 8 locking one surface 2a of the circuit board 2, and locking claws 9. Each locking claw is provided such that each locking claw can be folded inside the pair of rising parts 6, 6 while each locking claw is provided along the longitudinal direction of the pair of rising parts 6, 6, the leading end of each locking claw faces each other, and the lower end surface of each locking claw is linearly separated from the bottom plate 5 as approaching from the root section to the leading end, so that each locking claw is tilted in the longitudinal direction of the pair of rising parts 6, 6. Each locking claw is folded such that each edge of another surface 2b of the circuit board 2 can abut on the lower end surface. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

The present invention relates to a power supply device having a circuit board on which circuit components are mounted, and a lighting fixture including the power supply device.

Some power supply devices such as a discharge lamp lighting device that illuminates a fluorescent lamp at a high frequency include a circuit component mounted on a circuit board and the circuit board housed in a case. Some of the circuit boards are supported and locked by, for example, locking claws or locking pieces provided on the case. Here, there has been proposed a printed board fixing structure that fixes a printed board (circuit board) and enables positioning thereof (see Patent Document 1).

This prior art printed circuit board fixing structure is such that a fixing claw for fixing the printed circuit board to the case and a V groove provided in the printed circuit board are fitted, and the tapered claw is bent inward. Thus, the printed circuit board can be pressed and fixed, and the positioning can be performed.

Japanese Patent Laid-Open No. 2-97095 (2nd page, FIG. 1)

The printed circuit board fixing structure has a disadvantage that the printed circuit board is expensive because the printed circuit board is provided with positioning V-grooves. In addition, the tapered claw is bent so that the gap between the tapered lower end surface and the printed circuit board becomes zero, that is, in contact with the printed circuit board. When the tapered pawl is bent, the working time is further increased. In addition, in order to automatically perform the bending, high-precision management of the bending angle is required.

Further, as described in the prior art column of Patent Document 1, the structure in which the printed board is fixed by the protrusion protruding from the case and the bent claws has a gap formed between the printed board and the claws. It is easy and has the disadvantage of rattling when the printed circuit board vibrates.

SUMMARY OF THE INVENTION An object of the present invention is to provide a power supply device that can easily bend a locking claw for locking a circuit board and can suppress backlash of the circuit board, and a lighting fixture including the power supply device.

The power supply device according to the first aspect of the present invention includes a rectangular circuit board on which circuit components are mounted; a rectangular bottom plate portion, and inner surfaces facing each other along the longitudinal direction of the bottom plate portion. A pair of raised portions, projecting portions that are provided at both ends in the longitudinal direction of the pair of raised portions so as to protrude inside the pair of raised portions, and that lock one surface of the circuit board, and A straight line extends from the bottom plate portion to the both ends of the pair of uprights along the longitudinal direction of the pair of uprights so that the tip ends face each other and the lower end faces from the root to the tip. Are spaced apart from each other and inclined in the longitudinal direction of the pair of uprights so as to be foldable inside the pair of uprights, and the edge of the other surface of the circuit board contacts the lower end surface Folded possible Characterized in that it comprises a; the case and having an engaging claw.

In the present invention and each of the following inventions, each configuration is as follows unless otherwise specified.

The protrusion and the locking claw may be formed so as to face each other in the direction (rise direction) perpendicular to the longitudinal direction of the rising portion, or may be formed so as not to face each other. Is preferably formed.

The root portion of the locking claw means a shaft portion that bends the locking claw, and the tip portion means a portion on the open end side opposite to the root portion.

The “lower end surface of the locking claw” means a lower end surface in the vertical direction with respect to the ground surface when the bottom plate portion of the case is placed on the ground surface, for example.

“The locking claws are formed so as to be along the longitudinal direction of the pair of upright portions” means that the locking claws are formed in parallel to the bottom plate portion of the case.

The locking claws are formed on both end sides (one end side and the other end side) of each of the pair of upright portions (four are formed), and further, one or more in the middle between the one end side and the other end side. It may be formed. In this case, it is preferable that the intermediate locking claws are formed so that the tip portions face each other.

The protrusion may be a claw that is bent inwardly from the outside of the pair of raised portions.

According to the present invention, when the circuit board swings to the upright side when the case vibrates, the gap between at least one of the locking claws whose front ends face each other and the protrusion corresponding to the locking claw. , The edge of the other surface of the circuit board bites into contact with the lower end surface of the locking claw. Since the locking claws are provided so that their tip portions face each other, they act so as to press each other against the circuit board. Moreover, since the latching claws are provided on both end sides of the pair of upright portions, the circuit board bites into the lower end surface of the latching claws regardless of the direction. The circuit board is fixed between the caught claw and the protruding portion, and rattling in response to the vibration of the case is suppressed.

The power supply device according to a second aspect of the present invention is the power supply device according to the first aspect, wherein the engagement claw has an outer surface at a tip portion of the pair of uprights that is 0.3 mm or more than an outer surface of the upright portion. The circuit board is bent so as to be inside the upper part, and a lower end surface of the circuit board is abutted by scraping an edge of the other surface of the circuit board.

The upper limit of 0.3 mm or more is the distance between the outer surface of the raised portion and the distal end portion of the latching claw when the latching claw is bent at a right angle with respect to the raised portion. The total length of the part.

According to the present invention, the latching claws are bent so that the outer surface of the front end portion of the latching claw is 0.3 mm or more inside the pair of rising parts from the outer surface of the standing upper part of the case. Since the lower end surface scrapes and contacts the edge of the other surface of the circuit board, it is firmly supported and locked by the protruding portion and the locking claw between the pair of raised portions.

The invention of the lighting fixture according to claim 3 comprises the power supply device according to claim 1 or 2; an illumination load that is turned on by the power supply device; and a fixture body in which the illumination load is disposed. It is characterized by.

The power supply device may be disposed in the instrument body, or may be provided separately from the instrument body.

The illumination load may be anything that emits illumination light when it is turned on by a power supply device, such as a surface light emitting element such as a light emitting diode (LED) or an organic electroluminescence (EL) element, or a discharge lamp such as a fluorescent lamp.

According to this invention, the lighting fixture which comprises the illumination load by which lighting control is carried out by the power supply device of Claim 1 or 2 is provided.

According to the first aspect of the present invention, the respective locking claws face each other because the lower end surfaces thereof are inclined in the longitudinal direction of the pair of upright portions of the case and the tip portions thereof face each other. Since the latching claws act against each other against the circuit board, when the case vibrates, the circuit board bites between the latching claws and the protruding portion and is fixed, and the circuit board that responds to the vibration of the case The backlash can be suppressed, and the circuit board can be supported and locked between the pair of upright portions of the case with a simple configuration of the protruding portion and the locking claw.

According to the invention of claim 2, the lower end surface of the locking claw is bent by bending the outer surface of the front end portion so that the outer surface of the upper portion of the case is 0.3 mm or more inside the pair of upper portions. The edge of the other surface of the circuit board is scraped and brought into contact, and the circuit board is firmly supported and locked by the protruding portion and the locking claw. In addition, the circuit board can be prevented from being detached even when vibration is applied to the case.

According to invention of Claim 3, the lighting fixture which comprises the illumination load by which lighting control is carried out by the power supply device of Claim 1 or 2 can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a power supply device which shows Example 1 of this invention, (a) is a schematic longitudinal cross-sectional view, (b) is a schematic cross-sectional view. Similarly, the decomposition | disassembly schematic side view of a power supply device. Similarly, it shows a power supply device, (a) is a schematic partial cross-sectional view of a state in which the locking claw is locking the circuit board, (b) is a state in which the locking claw is shaved and locked to the circuit board FIG. Similarly, the schematic side view of another power supply device. The schematic cross-sectional view of the lighting fixture which shows Example 2 of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In the present invention, the circuit board is disposed between the pair of upright portions of the case, and is supported and locked by the protruding portions and the locking claws provided on both ends in the longitudinal direction of the pair of upright portions. The locking claw is provided so that the lower end surface thereof is inclined in the longitudinal direction of the upper portion of the case and the front end portion thereof faces each other. When vibration is applied to the case and the circuit board swings to the upright side of the case, the edge of the circuit board bites into the lower end surface of the locking claw. As a result, the circuit board is firmly fixed by the locking claws and the protruding portion, and rattling in response to vibration applied to the case is suppressed.

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a power supply device, (a) is a schematic longitudinal sectional view, (b) is a schematic transverse sectional view, and FIG. 2 is an exploded schematic view of the power supply device. 3 is a side view, FIG. 3 shows a power supply device, (a) is a schematic partial sectional view of a state in which the locking claw is locking the circuit board, and (b) is a locking claw that scrapes and locks the circuit board. FIG. 4 is a schematic side sectional view of another power supply device.

In FIG. 2, a power supply device 1 is a lighting device that lights a light emitting diode or a discharge lamp, for example, and includes a circuit board 2 and a case 3.

The circuit board 2 is made of a rectangular shape such as a glass epoxy material or a paper phenol material, and the circuit component 4 is mounted thereon. That is, transistors Q1 and Q2 which are chip components are mounted on one surface (lower surface) 2a, and a capacitor C1, which is a discrete component, a short capacitor C2, resistors R1 to R3, and a diode D1 are mounted on the other surface (upper surface) 2b. A transformer T1, an IC element IC1, an inductor (not shown), and the like are mounted. The board thickness of the circuit board 2 is 2.0 mm, for example. Further, since the circuit board 2 is made of a glass epoxy material or a paper phenol material, its hardness is relatively low.

The case 3 is made of a metal, for example, an aluminum alloy. As shown in FIG. 1, the case 3 is formed by bending a single flat plate into the bottom plate portion 5 and the pair of upright portions 6, 6. It is a box provided with side plates 7 on both ends 6C, 6D in the direction. That is, the bottom plate portion 5 is formed in a rectangular shape, and the pair of upright portions 6 and 6 are bent at a right angle with respect to the bottom plate portion 5, and inner surfaces of both sides along the longitudinal direction of the bottom plate portion 5. 6b and 6b are provided to face each other.

As shown in FIG. 2, the pair of upright portions 6 and 6 are provided with the protruding portions 8 and the locking claws 9 facing the both end sides 6 </ b> C and 6 </ b> D, respectively. The protruding portion 8 is formed by forming, for example, by punching long and narrow rectangular slits 10 and 10 that are arranged in parallel along the longitudinal direction on the outer surface 6a of the upright portion 6, and then a pair of upright portions 6 and 6 are formed between the slits 10 and 10 using a mold material. 6 is formed by pressing inside. The protruding portion 8 protrudes in an arc shape inside the pair of raised portions 6 and 6, the circuit board 2 is placed on the upper end surface 8 a, and supports and locks one surface (lower surface) 2 a of the circuit board 2.

The locking claw 9 is formed by punching, for example, on the outer surface 6a of the upright portion 6 so as to be higher than the protruding portion 8. And the latching claws 9 and 9 of both ends 6C and 6D of a pair of upright parts 6 and 6 are provided so that the front-end | tip part 9b may face each other along the longitudinal direction of the upright part 6, respectively.

Further, the lower end surface 9c of the locking claw 9 is formed so as to incline linearly in the longitudinal direction of the upright portion 6 so as to be separated from the inner surface 5a side of the bottom plate portion 5 as it goes from the root portion 9a to the tip end portion 9b. ing. Here, the lower end surface 9c has a base portion 9ca below the other surface (upper surface) 2b of the circuit board 2 and a tip portion 9ba above the other surface (upper surface) 2b of the circuit board 2. Thus, it forms in the inclined surface according to the plate | board thickness of the circuit board 2. As shown in FIG. Thereby, when the latching claw 9 is bent inside the pair of upright portions 6, 6, the lower end surface 9 c can come into contact with the edge 2 bb of the other surface 2 b of the circuit board 2. The upper end surface 9 d of the locking claw 9 is formed in parallel with the bottom plate portion 5.

An opening 11 is provided in the periphery of the locking claw 9 excluding the root portion 9c. Thereby, the latching claw 9 can be bent inside the pair of upright portions 6 and 6 with the root portion 9a as a bending axis, and the bending process is easy.

As shown in FIG. 1A, the circuit board 2 is formed such that its width K1 is smaller by, for example, 0.1 to 0.5 mm than the distance K2 between the inner surfaces 6b and 6b of the pair of upright portions 6 and 6. Has been. Here, when the width K1 of the circuit board 2 is smaller than the inner surfaces 6b and 6b of the pair of uprights 6 and 6 by less than 0.1 mm, it becomes difficult to insert the circuit board 2 between the pair of uprights 6 and 6. . Further, if the width K1 of the circuit board 2 is smaller than 0.5 mm between the inner surfaces 6b, 6b of the pair of raised portions 6, 6, the entire length of the locking claw 9 (between the root portion 9a and the tip portion 9b) is reduced. It is necessary to increase the angle, or the angle at which the locking claw 9 is bent inside the pair of upright portions 6 and 6 is increased.

As shown in FIG. 3A, the locking claw 9 has a pair of raised portions 6 and 6 such that the outer surface 9bb of the tip end portion 9b is, for example, 0.3 mm from the outer surface 6a of the raised portion 6. It can be folded inward. Thereby, the lower end surface 9c of the latching claw 9 contacts the edge portion 2bb of the other surface (upper surface) 2b of the circuit board 2. Further, when the locking claw 9 is bent deeply inside the pair of upright portions 6 and 6, the lower end surface 6c is turned to the edge 2bb of the other surface (upper surface) 2b of the circuit board 2 as shown in FIG. The edge portion 2bb can be scraped and brought into contact with.

The circuit board 2 is supported and locked by the protruding portion 8 and the locking claw 9, thereby restricting the movement of the pair of upright portions 6 and 6 in the direction perpendicular to the longitudinal direction. Further, the circuit board 2 is restricted from moving in the longitudinal direction of the pair of upright portions 6 and 6 by the side plates 7 and 7 of the case 3.

The case 3 is fitted with a case lid 12 as shown in FIG. The case lid 12 need not be provided, but is effective when the power supply device 1 is installed in a place where dust or the like easily enters.

The case lid 12 is made of a metal, for example, an aluminum (Al) plate, and has a pair of side plates 13 and 13 and a top plate 14 straddling the side plates 13 and 13 by bending one rectangular flat plate. It is formed on a scale frame. The side plate portions 13 and 13 and the top plate portion 14 are appropriately provided with ventilation slits (not shown). The case lid 12 is attached to the case 3 such that the pair of side plate portions 13 and 13 sandwich the pair of upright portions 6 and 6 of the case 3.

Next, the operation of the first embodiment of the present invention will be described.

The circuit board 2 on which the circuit component 4 is mounted is inserted into the case 3, and one surface (lower surface) 2 a of the circuit board 2 is placed on the protruding portion 8. The circuit board 2 is supported and locked at four locations on both ends 6C and 6D in the longitudinal direction of the pair of upright portions 6 and 6 of the case 3. And the latching claw 9 provided in the both ends 6C and 6D of the longitudinal direction of a pair of upright parts 6 and 6 is bend | folded inside a pair of upright parts 7 and 7, respectively. At this time, it is bent so that the outer surface 9bb of the distal end portion 9b of the locking claw 9 is 0.3 mm or more than the outer surface 6a of the raised portion 6. Thereby, the lower end surface 9c of the latching claw 9 contacts the edge portion 2bb of the other surface (upper surface) 2b of the circuit board 2. Here, the angle formed by the outer surface of the locking claw 9 and the outer surface 6a of the upright portion 6 is a bending angle.

Since one surface (lower surface) 2a of the circuit board 2 is supported and locked by the protrusion 8, and the locking claw 9 abuts on the other surface (upper surface) 2b, the circuit board 2 is orthogonal to the longitudinal direction of the circuit board 2. Movement in the direction of movement (vertical direction) is restricted. Further, the side plates 7 of the case 3 regulate the movement of the circuit board 2 in the longitudinal direction. In this way, the circuit board 2 is disposed and held between the pair of upright portions 6 and 6 with a simple configuration of the protruding portions 8 and the locking claws 9 provided on the pair of upright portions 6 and 6.

Thus, the circuit board 2 does not require the locking claw 9 to be bent at a highly accurate size or angle, and if it is bent inside the pair of upright portions 6 and 6 by 0.3 mm or more, the locking claw 9 Can be supported and locked to the protruding portion 8 and the locking claw 9 by contacting the edge 2bb of the other surface 2b of the circuit board 2.

When vibration is applied to the case 3, the circuit board 2 vibrates in response to the vibration. The circuit board 2 swings randomly between the pair of upright portions 6 and 6 of the case 3, between the side plates 7 and 7, and between the protruding portion 8 and the locking claw 9.

When the circuit board 2 swings toward one or the other upright portion 6 in the longitudinal direction, the circuit board 2 enters between the protruding portions 8 and the locking claws 9 on both end sides 6C and 6D of the upright portion 6, and the other surface ( The edge 2bb of the upper surface 2b bites into the lower end surface 9c of the locking claw 9. Since the lower end surface 9c is formed in an inclined surface that is linearly separated from the bottom plate portion 5 as it goes from the root portion 9a to the tip end portion 9b, the circuit board 2 further extends along the lower end surface 9c and on the lower end surface 9c. It moves while being shaved, and bites between the protruding portion 8 and the lower end surface 9 c of the locking claw 9. Thereby, the circuit board 2 is clamped and fixed between the protrusion 8 and the locking claw 9.

Further, when one end side or the other end side in the longitudinal direction of the circuit board 2 swings to the upright part 6 side, the circuit board 2 is arranged between the protruding part 8 and the locking claw 9 on the one end side 6C or the other end side 6D of the upright part 6. It enters and bites into the lower end surface 9 c of the locking claw 9. Here, the locking claws 9, 9 provided on the upright portion 6 are formed so as to face each other, and the lower end surface 9 c is formed on the inclined surface and acts so as to press against the circuit board 2. Therefore, the circuit board 2 further moves along the lower end surface 9 c while being scraped by the lower end surface 9 c, and bites between the protruding portion 8 and the lower end surface 9 c of the locking claw 9. As a result, the circuit board 2 is held between the protrusion 8 and the locking claw 9. If the engaging claws 9 and 9 are formed in the pair of raised portions 6 and 6 so as to face each other, the inclined surface 9c is formed on the inclined surface, so that the distal end portion 9b side is opened. Since it becomes an end, the circuit board 2 is easier to move to the bottom plate 7 side of the case 3 than to enter the root portion 9b side while being cut by the lower end surface 9c.

And since the latching claw 9 is provided in both ends 6C and 6D of a pair of upright parts 6 and 6, respectively, even if the circuit board 2 shakes in any direction by vibration of case 3, the protrusion part 8 and It bites between the lower end surfaces 9c of the locking claws 9 and is pinched and firmly fixed.

As described above, the end portions 9b of the locking claws 9 are provided so as to face each other, the locking claws 9 act so as to press each other against the circuit board 2, and the circuit board 2 is vibrated when the case 3 vibrates. Since it can be fixed between the protrusion 8 and the locking claw 9 regardless of the direction of vibration, the circuit board 2 can be prevented from rattling in response to the vibration of the case 3, and the protrusion 8 and the engagement The circuit board 2 can be supported and locked between the pair of upright portions 6 and 6 of the case 3 with a simple configuration of the pawl 9.

Further, by bending the locking claw 9 to the inside of the pair of uprights 6 and 6 at a bending angle such that the outer surface 9bb of the tip 9b is 0.3 mm or more than the outer surface 6a of the upright part 6 of the case 3, Since the circuit board 2 is supported and locked by the protruding portion 8 and the locking claw 9, the allowable range of the size and bending angle of the locking claw 9 can be widened, and the circuit can be applied even if vibration is applied to the case 3. It can prevent that the board | substrate 2 removes from the protrusion part 8 and the latching claw 9. FIG.

FIG. 5 is a schematic cross-sectional view of a luminaire showing Example 2 of the present invention. The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

A lighting fixture 16 shown in FIG. 5 is a security light installed outdoors. The power source device 1 shown in FIG. 1, the fixture main body 18 to which the translucent cylindrical cover 17 is attached, and a light emitting diode 19 as a lighting load. It has the light emitting unit 20 which comprises.

The instrument main body 18 is made of aluminum die-casting, the outer peripheral portion thereof is cylindrical, and the inner contour thereof is also formed in a circular shape. The instrument body 18 is detachably attached to the arm 21 with screws or the like. The appliance body 18 is attached to a pole such as a utility pole installed on the road surface by an arm 21.

The cylindrical cover 17 is integrally formed of a translucent resin such as acrylic or polycarbonate resin, the top portion 22 is closed, and an opening portion 24 is formed on the base end portion 23 side. And the base end part 23 is attached to the outer peripheral part of the instrument main body 18 via the waterproof packing 25.

The light emitting unit 20 includes a substrate 26 on which the light emitting diode 19 is mounted on the main surface, and an aluminum (Al) heat dissipation plate 27 disposed in close contact with the back surface of the substrate 26. The heat radiating plate 27 is inserted into a pair of grooves 28 formed on the inner side of the cylindrical cover 17 and fixed to the instrument body 18. A plurality of the light emitting diodes 19 are mounted on the main surface of the substrate 26 and emit visible light, for example, white light.

The power supply device 1 is disposed on the heat sink 27. The power supply device 1 is connected to a power supply line 29 introduced into the instrument body 18, and receives an AC voltage from the power supply line 29. Then, the AC voltage is converted into a predetermined DC voltage by the operation of the circuit component 4 and supplied to the light emitting diode 19. As a result, the light emitting diode 19 is turned on when a predetermined current flows. The power supply device 1 does not include the case lid 12 and is attached to the heat radiating plate 27 so that the bottom plate portion 5 of the case 3 is on the non-heat radiating plate side.

Since the lighting fixture 16 includes the power supply device 1 that supports and locks the circuit board 2 with a simple configuration and can suppress backlash due to vibration, the quality can be improved and the device can be formed at low cost.

INDUSTRIAL APPLICABILITY The present invention can be used for a power supply device that supplies power to a control device or an electric device such as a motor or a heater in addition to a lighting device that lights a lighting load.

DESCRIPTION OF SYMBOLS 1 ... Power supply device, 2 ... Circuit board, 3 ... Case, 5 ... Bottom plate part, 6, 6 ... A pair of upright part, 8 ... Projection part, 9 ... Locking claw, 16 ... Lighting fixture, 18 ... Instrument main body, 19 ... Light-emitting diodes as lighting loads

Claims (3)

A rectangular circuit board on which circuit components are mounted; a rectangular bottom plate portion, a pair of upright portions formed so that inner surfaces of the bottom plate portion face each other along the longitudinal direction of the bottom plate portion, and the pair of upright portions A projecting portion that is provided on each of both end sides in the longitudinal direction so as to project inside the pair of uprights, and that engages one surface of the circuit board, and both ends in the longitudinal direction of the pair of uprights The lengths of the pair of uprights are linearly spaced apart from the bottom plate portion so that the lower end faces from the base part to the front end part along the longitudinal direction of the pair of upright parts, respectively, and the lower end surface faces each other. A case having a locking claw that is foldable inside the pair of uprights so as to be inclined in a direction, and is bent at the lower end surface so that the edge of the other surface of the circuit board can be contacted. ; Power supply, characterized in that to. The locking claw is bent so that the outer surface of the tip portion is 0.3 mm or more inside the pair of raised portions than the outer surface of the raised portions, and the lower end surface is the edge of the other surface of the circuit board 2. The power supply device according to claim 1, wherein the power supply device is cut and abutted. An illumination fixture comprising: the power supply device according to claim 1; an illumination load that is turned on by the power supply device; and an appliance body on which the illumination load is disposed.

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