JP6102021B2 - Power supply device and vehicle headlamp device using the same - Google Patents

Description

  The present invention relates to a power supply device and a vehicle headlamp device using the same.

  2. Description of the Related Art Conventionally, there is a power supply device that supplies lighting power to a headlight composed of an HID lamp, an LED, or the like using a battery mounted on a vehicle as a power source. This type of power supply device includes a power supply circuit that converts an input voltage from a battery into an output voltage corresponding to a headlamp and outputs the output voltage. This power supply circuit is configured by mounting circuit elements on a substrate, and is housed in a metal case (see Patent Document 1).

  A configuration of a conventional power supply device will be described with reference to FIGS.

  A conventional power supply device includes a box-shaped case body 101, a substrate 102 accommodated in the case body 101, a circuit element 103 mounted on the substrate 102, and a mounting flange portion 104 that closes an opening of the case body 101. Main structure.

  The case body 101 is formed in a metal box shape whose one surface is open.

  The board | substrate 102 is formed in plate shape, and comprises the power supply circuit by mounting the several circuit element 103 on both surfaces. Then, the substrate 102 on which the circuit element 103 is mounted is placed on the bottom surface of the case body 101.

  The mounting flange portion 104 is formed in a plate shape that closes the opening of the case body 101.

  The power supply device having such a configuration is attached to a vehicle lamp and supplies lighting power to the headlamp using a battery as a power source.

  Here, when the power supply device operates to supply power to the headlamp, heat is generated from the circuit element 103. Therefore, in the conventional power supply device, as shown in FIG. 14, the heat generated in the circuit element 103 is dissipated by forming an uneven portion 101 a in the case body 101.

  A circuit element 103 having a relatively large calorific value, such as a transistor or a large diode, is mounted on the back surface of the substrate 102, and a concavo-convex portion 101 a surrounding the circuit element 103 is provided on the bottom surface of the case body 101. By this uneven portion 101a, the circuit element 103 having a large calorific value and the case body 101 come close to each other, and heat generated in the circuit element 103 can be radiated to the case body 101.

JP 2002-367413 A

  In recent years, it has been desired to reduce the weight of automobile parts as a measure for improving the fuel efficiency of automobiles. However, in order to provide the concavo-convex portion 101a in the case body 101, it is necessary to mold the case body 101 by die casting. When a complicated shape such as the concavo-convex portion 101a is formed by using die casting, a nest (hole) may be generated at the time of forming. When the case body 101 is formed thick in consideration of the safety at the time of nest generation, there is a problem that an excessive thickness that is not necessary if the nest does not exist is excessive and the power supply device becomes heavy.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide a power supply device that can be reduced in weight while ensuring heat dissipation of circuit elements, and a vehicle headlamp device using the same. It is to provide.

A power supply device of the present invention is formed by a power supply circuit that converts input power into predetermined output power and supplies the power to a load, a substrate on which circuit elements constituting the power supply circuit are mounted only on one surface, and metal pressing. A first casing having a flat bottom surface and a second casing molded by metal press working, and the first casing and the second casing are combined to form an interior. Forming a space in the space and housing the substrate in the space, and the substrate is placed on the bottom surface with the other surface on which the circuit element is not mounted facing the bottom surface. The communication hole is formed to communicate between the one surface side and the other surface side of the substrate, copper is provided on the inner peripheral surface and the opening periphery of the communication hole in the substrate, and the circuit element is mounted on the communication hole. Formed on the other side of the opening. There characterized by thermally coupled to the bottom surface.
In this power supply apparatus, it is preferable that the copper is connected to a ground of the power supply circuit, and the case is connected to a ground.

  In this power supply device, it is preferable that the first housing includes a fixing portion that is fixed to a structure, and the fixing portion is integrally formed with the first housing.

  In this power supply device, the second casing is formed in a box shape with one side opened, and the first casing has a groove into which the opening end of the second casing is fitted in the bottom surface. It is preferable.

In this power supply device, a convex portion is formed on one of the first casing and the second casing, and a through-hole through which the convex portion passes is formed on the other. by plastic deformation of the protruding the protruding portion, it is preferable that the first and the said the housing second housing are fastened.

  In this power supply device, the first casing has a fixing portion that is fixed to a structure, the convex portion is formed on the bottom surface, and the second casing has a box shape with one surface opened. Formed, having the through-hole through which the convex portion passes, the fixing portion being integrally formed with the first housing, and formed on the protruding direction side of the convex portion with respect to the bottom surface. It is preferable.

  In this power supply device, the first housing has the convex portion formed on the bottom surface, the second housing is opposed to the bottom surface, and the through hole through which the convex portion passes and a jig. A fixing piece having a pressing portion pressed against the bottom surface, and the convex portion protruding from the through hole is plastically deformed in a state where the pressing portion is pressed against the bottom surface by the jig. It is preferable to fasten the housing and the second housing.

  In this power supply device, it is preferable that the fixed piece has a pair of pressing portions, and the through hole is formed between the pair of pressing portions.

  A vehicle headlamp device according to the present invention includes a power supply circuit that converts input power into predetermined output power and supplies the power to a load, a substrate on which circuit elements constituting the power supply circuit are mounted only on one surface, and a metal press A first casing having a flat bottom surface and a second casing molded by metal pressing, wherein the first casing and the second casing are combined. Forming a space therein and housing the substrate in the space, and the substrate is mounted on the bottom surface with the other surface on which the circuit element is not mounted facing the bottom surface. And a power supply device in which a communication hole is formed to communicate between one surface side and the other surface side of the substrate, and a headlamp supplied with power from the power supply device.

  As described above, according to the present invention, there is an effect that it is possible to reduce the weight while ensuring the heat dissipation of the circuit element.

It is a disassembled perspective view of the power supply device of Embodiment 1 of this invention. It is an external view same as the above. (A) (b) It is an enlarged view of a board | substrate same as the above. It is a cross-sectional enlarged view same as the above. It is an enlarged view of the power supply device of another structure. It is sectional drawing of the vehicle headlamp apparatus. It is a block block diagram of the vehicle headlamp apparatus. FIG. 6 is an external view of a power supply device according to a second embodiment. It is an external view of the 2nd housing | casing 6 same as the above. It is an enlarged view of a fixed piece same as the above. It is the schematic at the time of caulking fixation. It is the schematic at the time of caulking fixation. It is a disassembled perspective view of the conventional power supply device. It is an external view of the case body of the conventional power supply device.

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

(Embodiment 1)
An exploded perspective view of the power supply device 1 of the present embodiment is shown in FIG. 1, and an external view is shown in FIG. The power supply device 1 of this embodiment is attached to a lamp of a vehicle headlamp device, and supplies lighting power to the headlamp using a battery mounted on the vehicle as an input power source. Below, the structure of the power supply device 1 is demonstrated. In the following description, the up / down / left / right direction in FIG. 1 is defined as the up / down / left / right direction, and the direction orthogonal to the up / down / left / right direction is defined as the front / rear direction.

  The power supply device 1 of this embodiment is configured by housing a substrate 3 on which a circuit element 2 is mounted in a metal case 4.

  The board | substrate 3 is comprised with the printed circuit board made from the glass epoxy provided with the conductor pattern, and is formed in the rectangular plate shape. A plurality of circuit elements 2 such as capacitors, resistors, transformers, and control ICs are mounted only on the upper surface (one surface) of the substrate 3. Also, an input / output integrated connector 21 constituting an input / output terminal of the power supply circuit is mounted in the vicinity of the front edge at the approximate center in the left-right direction on the upper surface of the substrate 3. The connector 21 is formed in a rectangular shape with an open front surface, and an input / output coupler (not shown) connected to a battery (not shown) and a headlamp (not shown) is connected via a harness. Then, by connecting each circuit element 2 and the connector 21 with a copper conductor pattern, a power supply circuit that converts input power supplied from the battery into predetermined lighting power (output power) and supplies it to the headlamp It is composed. Note that the configuration of the power supply circuit is well known, and thus the description thereof is omitted.

Here, a partially enlarged view of the substrate 3 is shown in FIGS. 3A is a partially enlarged view of the substrate 3 before the circuit element 2 is mounted, and FIG. 3B is a partially enlarged view of the substrate 3 after the circuit element 2 is mounted. A plurality of vias 32 (communication holes) for heat dissipation are formed in the conductor pattern 31 provided on the substrate 3. The via 32 communicates the upper surface side and the lower surface side of the substrate 3. 3A and 3B is a ground pattern of the power supply circuit, and a pad 31b to which the ground terminal of the circuit element 2 is soldered is provided. The pad 31b is formed by applying solder to a conductor pattern (copper) exposed on the surface (upper surface) of the substrate 3, and a via 32 is also formed under the pad 31b.

  The substrate 3 on which the circuit element 2 and the connector 21 are mounted is accommodated in the case 4. The case 4 is made of a metal material, and the first casing 5 on which the substrate 3 is placed and the second casing 6 surrounding the first casing 5 are combined. Composed.

  The first housing 5 is formed by metal pressing a metal plate material, and a flat bottom surface 51 on which the substrate 3 is placed, and the power supply device 1 (case 4) for a vehicle (lamp). And stay portions 52a and 52b that are fixed to each other.

  The bottom surface 51 is formed in a substantially rectangular plate shape wider than the substrate 3, and the substrate 3 is placed so that the upper surface faces the lower surface (other surface) of the substrate 3.

  The board 3 has positioning insertion holes 33 in the vicinity of the left front corner and in the vicinity of the right rear corner. The bottom surface 51 is formed with a cylindrical convex portion 511 that protrudes upward at a position facing the insertion hole 33 of the substrate 3. Further, a flange 512 having a diameter larger than that of the convex portion 511 is formed at the base peripheral edge portion of the convex portion 511.

  Further, the board 3 is formed with insertion holes 34 through which the board fixing screws 53 are inserted in the vicinity of the left rear corner and in the vicinity of the right front corner. A screw hole 513 to which a screw 53 is fastened (screwed) is formed in the bottom surface 51 at a position facing the insertion hole 34 of the substrate 3. The screw hole 513 is formed by burring and tapping, and a flange 515 is formed at the peripheral edge of the screw hole 513 on the lower surface of the bottom surface 51 as shown in FIG. The flange 515 secures a contact area between the screw 53 and the screw hole 513 and prevents the screw 53 from coming off. Further, a flange 514 is formed on the peripheral edge of the screw hole 513 on the upper surface of the bottom surface 51. Note that the flanges 512 and 514 have substantially the same height (vertical dimension).

  Then, the substrate 3 is placed on the bottom surface 51 with the projections 511 being inserted into the insertion holes 33, the peripheral portions of the insertion holes 33 and 34 are in contact with the flanges 512 and 514, and the screws 53 are fastened to the screw holes 513. As a result, the bottom surface 51 is fixed.

  The second housing 6 is formed by metal pressing a metal plate material, and is formed in a rectangular box shape having an open bottom surface. The second housing 6 is formed in a rectangular shape whose opening shape is wider than the substrate 3, and is attached so as to surround the upper surface of the bottom surface 51 of the first housing 5. As a result, the opening of the second housing 6 is blocked by the bottom surface 51 of the first housing 5, and the inside of the rectangular body 4 surrounded by the first housing 5 and the second housing 6. The substrate 3 is accommodated in this space.

  In addition, a rectangular notch 517 is formed in the bottom surface 51 of the first housing 5 at the approximate center of the front edge in the left-right direction. In addition, a rectangular notch 61 that is continuous from the lower end to the upper end is formed substantially at the center in the left-right direction on the front surface of the second casing 6, and the notch 61 is continued on the upper surface of the second casing 6. A rectangular cutout 62 is formed. The notches 517, 61 and 62 allow the connector 21 mounted on the board 3 to be exposed from the case 4, and the input / output coupler 22 can be attached and detached while the board 3 is housed in the case 4.

  In addition, a rectangular frame-shaped groove 516 is formed on the bottom surface 51 of the first housing 5 at a position (around the substrate 3) facing the lower edge 6a (opening end) of the second housing 6. . As shown in FIG. 4, when the first housing 5 and the second housing 6 are combined, the lower edge 6 a of the second housing 6 is fitted into the groove 516, thereby Positioning with respect to the housing 5 is performed.

  Further, dowels (convex portions) 518 are formed in the vicinity of the four corners (left front, left rear, right front, right rear) on the bottom surface 51 of the first housing 5. Each dowel 518 is formed in a cylindrical shape protruding upward outside the groove 516. In addition, a rectangular plate-shaped fixing piece 63 having a thickness direction in the vertical direction is formed in the vicinity of the lower left corner and the lower right corner of each of the front and rear surfaces of the second housing 6, and the fixing piece 63 faces the dowel 518. A circular through hole 64 is formed at the position. When the first housing 5 and the second housing 6 are combined, the dowel 518 penetrates the through hole 64, and the tip of the dowel 518 protruding upward from the through hole 64 is crushed and plastically deformed. Thus, the first housing 5 and the second housing 6 are fastened.

  Next, stay portions (fixing portions) 52a and 52b for fixing the power supply device 1 to the lamp of the vehicle headlamp device will be described. The first casing 5 has a bottom surface 51 and stay portions 52a and 52b formed by metal press processing. The stay portion 52 a is formed upward from the left end of the bottom surface 51, and the stay portion 52 b is formed upward from the right end of the bottom surface 51. Note that the stay portion 52a and the stay portion 52b have the same symmetrical configuration, so only the stay portion 52a will be described.

  The stay portion 52a includes a connection piece 521 bent upward from the left end of the bottom surface 51, a first fixed piece 522 bent leftward from the upper end of the connection piece 521, and a front end of the first fixed piece 522. The second fixed piece 523 is bent downward.

The connection piece 521 is bent upward from the left end of the bottom surface 51 and is formed in a plate shape with the left-right direction as the thickness direction. In addition, the front end of the connection piece 521 is formed with an inclined portion 521a that is inclined rearward as it goes upward. It is short. As shown in FIG. 4 , the connection piece 521 is slightly inclined in the left direction so as not to interfere with the left surface of the second housing 6.

  The first fixed piece 522 is bent leftward from the upper end of the connection piece 521, and is formed in a rectangular plate shape whose vertical direction is the thickness direction. The first fixed piece 522 has two screw insertion holes 524 arranged in the front-rear direction.

The second fixed piece 523 is bent downward from the front end of the first fixed piece 522 , and is formed in a rectangular plate shape whose thickness direction is the front-rear direction. The vertical dimension of the second fixed piece 523 is shorter than the vertical dimension of the connection piece 521, and the lower end of the second fixed piece 523 is positioned above the bottom surface 51. Further, the second fixing piece 523 is formed with a screw insertion hole 525.

  The power supply device 1 is fixed to the lamp by fastening a fixing screw (not shown) through the screw insertion hole 524 or the screw insertion hole 525. Note that at least one of the screw insertion holes 524 and 525 may be used according to the lamp to which the power supply device 1 is attached.

  The power supply device 1 of this embodiment can obtain the following effects by the above configuration.

  First, since the circuit element 2 is mounted only on the top surface of the substrate 3 placed on the bottom surface 51, the bottom surface is planar, and the entire bottom surface of the substrate 3 is close to the bottom surface 51. Further, a plurality of heat radiation vias 32 are formed in the substrate 3. Therefore, the heat generated in the circuit element 2 can be efficiently radiated to the bottom surface 51 through the substrate 3 and the via 32, and the heat dissipation of the circuit element 2 can be ensured. Further, as shown in FIGS. 3A and 3B, the heat dissipation of the circuit element 2 can be further improved by forming the via 32 under the pad 31b on which the circuit element 2 is mounted.

  Since the heat dissipation of the circuit element 2 can be ensured by the above configuration, it is not necessary to provide a heat radiation uneven portion having a complicated shape as in the conventional case on the bottom surface 51. Therefore, the case 4 (the first housing 5 and the second housing 6) can be formed by metal press processing instead of die casting, and the processing process becomes easy. Furthermore, by forming the case 4 by metal press processing, there is no generation of nests at the time of molding, so the thickness of each surface can be made thinner than in the case of molding by die casting. Can be planned.

  Further, as shown in FIG. 5, the flanges 512 and 514 may not be provided, and the entire lower surface of the substrate 3 may be in contact with the bottom surface 51. Thereby, the heat generated in the circuit element 2 is directly radiated to the bottom surface 51 through the substrate 3 and the via 32, so that the heat dissipation of the circuit element 2 can be improved. Further, by interposing a heat radiating member such as a heat conductive resin between the substrate 3 and the bottom surface 51, the gap between the substrate 3 and the bottom surface 51 is reduced, and the heat dissipation of the circuit element 2 can be further improved. it can.

Further, as shown in FIGS. 3A and 3B, vias 32a in which the inner peripheral surface and the opening peripheral edge are plated with copper may be formed in the conductor pattern 31a which is the ground pattern of the power supply circuit. Thereby, the whole lower surface of the board | substrate 3 and the bottom face 51 contact, and the copper part of the via | veer 32a also contacts the bottom face 51 (refer FIG. 5). Generally, the heat conductivity of copper is high, and the heat generated in the circuit element 2 is radiated to the bottom surface 51 through the inner peripheral surface of the via 32a and the copper at the periphery of the opening, thereby further improving the heat dissipation of the circuit element 2. Can be made. In particular, under the pad 31b of the circuit element 2 is mounted, the inner peripheral surface to form a via 32a to the opening peripheral edge is plated with copper, by the via 32 a is configured to contact the bottom surface 51, The circuit element 2 can contact the bottom surface 51 through the solder and copper of the via 32a, and can obtain higher heat dissipation. In this case, the conductor pattern 31a of the substrate 3 and the case 4 (bottom surface 51) are electrically connected. However, since the case 4 is connected to the earth such as a metal part of the vehicle body and the conductor pattern 31a is a ground pattern of the power supply circuit, the operation of the power supply circuit is not affected.

  Furthermore, the stay portions 52 a and 52 b are integrally formed with the bottom surface 51. That is, since the surface area of the first housing 5 is increased by the stay portions 52a and 52b, the heat dissipation of the circuit element 2 is improved. Further, by integrally forming the stay portions 52a and 52b and the bottom surface 51, the case 4 can be made smaller than when the stay portions 52a and 52b and the bottom surface 51 are formed separately. In addition, the stay portions 52a and 52b are fixed to metal parts of the vehicle headlamp device whose temperature is lower than that of the power supply device 1 (case 4), or a part of the first housing 5 is fixed to the vehicle headlamp. You may comprise so that it may expose outside a lamp device. Thereby, the case 4 (the first housing 5) can be cooled, and the heat dissipation of the circuit element 2 can be further improved.

  Further, the lower edge 6a of the second housing 6 is fitted into the groove 516 formed in the bottom surface 51 of the first housing 5, so that the first housing 5 and the second housing 6 are connected. Combined. That is, a groove 516 into which the lower edge 6a of the second housing 6 is fitted is formed on the bottom surface 51, so that the first housing 5 and the second housing when viewed from the side surface of the case 4 are formed. The gap in the combination part with the body 6 is reduced. By reducing the gap between the first casing 5 and the second casing 6, it is possible to prevent unnecessary radiation noise generated from the power supply circuit (circuit element 2) from propagating outside the case 4. . Thereby, since radiation noise countermeasure components can be reduced, the power supply device 1 can be reduced in size and weight.

  Further, the first casing 5 placed on the work table is covered with the second casing 6, and the dowel 518 formed on the bottom surface 51 of the first casing 5 is crushed, whereby the first casing 5 is covered. The body 5 and the second casing 6 are caulked and fixed. In other words, the dowel 518 is plastically deformed, so that the electrical connection and the mechanical connection between the first casing 5 and the second casing 6 are simultaneously performed. Thereby, since it is not necessary to use separate parts, such as a screw | thread, in order to fasten the 1st housing | casing 5 and the 2nd housing | casing 6, the number of parts can be deleted and weight reduction can be achieved. Furthermore, a tool such as a screwdriver is not required, and the first casing 5 and the second casing 6 can be fastened with a simple press jig.

  The stay portions 52 a and 52 b are formed above the bottom surface 51, and the lower end of the second fixing piece 523 is located above the bottom surface 51. Thereby, when the assembly operation of the first housing 5 and the second housing 6 is performed, the stay housing 52a, 52b prevents the first housing 5 from being inclined with respect to the work table. The dowel 518 can be caulked and fixed uniformly in one step.

  Next, the configuration of the vehicle headlamp device 10 using the power supply device 1 described above will be described. In FIG. 6, the schematic block diagram of the vehicle headlamp apparatus 10 is shown.

  The vehicle headlamp apparatus 10 includes the above-described power supply apparatus 1, a headlamp 11 that is, for example, an HID headlamp, a socket 12 that holds the headlamp 11, a power supply apparatus 1, a headlamp 11, and a socket 12. And the igniter 14 for starting the headlamp 11 are the main components.

  The lamp body 13 includes a bottom portion 131 having an exchange hole 131a for replacing the headlamp 11, and a side portion 132 extending from the outer peripheral edge of the bottom portion 131 to the front side (the left side in FIG. 6). Yes. A detachable cap 133 that closes the replacement hole 131a is attached to the bottom 131. A lamp lens 134 made of a translucent material that diffuses light from the headlamp 11 is attached to the front surface side of the lamp body 13.

  A reflector 15 that irradiates the lamp lens 134 with light from the headlamp 11 is provided around the headlamp 11. The reflecting plate 15 is fixed to a mounting base 16 that protrudes from the bottom 131 of the lamp body 13 to the front side. The lamp body 13 is provided with an optical axis adjusting screw 17 coupled to the reflecting plate 15. By adjusting the tightening degree of the optical axis adjusting screw 17, the direction of the reflecting plate 15 can be adjusted, and the optical axis of the headlamp 11 can be adjusted.

  The igniter 14 includes a starting circuit that supplies a high voltage pulse when the headlamp 11 is started, and is provided integrally with the socket 12.

  The power supply device 1 is attached to the lower side portion 132 of the lamp body 13. The input / output integrated connector 21 provided in the power supply device 1 is connected to an input / output coupler 22 to which the first harness 22a and the second harness 22b are connected. The first harness 22 a is connected to a power supply port 135 provided in the bottom 131 of the lamp body 13, and a battery mounted on the vehicle is connected to the power supply port 135. The second harness 22b is connected to the igniter 14. The power supply device 1 is applied with a DC voltage of 12 V from the battery via the power supply port 135, the first harness 22a, and the input / output coupler 22. The power supply device 1 includes a power supply circuit that functions as an inverter circuit by mounting the circuit element 2 on the substrate 3, boosts the DC voltage input from the battery to a predetermined DC voltage, and boosts the DC voltage. Is converted to AC voltage. Then, the power supply device 1 outputs an AC voltage to the igniter 14 and the headlamp 11 via the input / output coupler 22 and the second harness 22b.

  Next, operation | movement of the vehicle headlamp apparatus 10 is demonstrated. In FIG. 7, the block block diagram of the vehicle headlamp apparatus 10 is shown.

  In a state where the headlamp 11 is not lit, the switch SW1 for turning on the headlamp 11 is turned on, so that 12V is supplied from the battery E1 to the power supply device 1 via the first harness 22a and the input / output coupler 22. DC voltage is input. The power supply device 1 boosts a DC voltage of 12V to a predetermined DC voltage, and converts the boosted DC voltage into an AC voltage. The igniter 14 generates a high-voltage pulse (25 kV) from the AC voltage input via the input / output coupler 22 and the second harness 22b, and supplies the high-voltage pulse (25 kV) to the headlamp 11 via the socket 12 so that the headlamp 11 is started. After the headlamp 11 is started, the power supply device 1 maintains the lighting state of the headlamp 11 by supplying an AC voltage to the headlamp 11.

  Here, when the headlamp 11 is turned on, unnecessary radiation noise is generated and propagated into the atmosphere. Therefore, the second harness 22b is used to connect the power supply circuit of the power supply device 1 and the igniter 14 to each other, and the ground connection line connected to this ground is connected to the earth such as a metal part of the vehicle body, for example. This suppresses the propagation of radiation noise into the atmosphere.

(Embodiment 2)
FIG. 8 is an external view of the power supply device 1 of the present embodiment, FIG. 9 is an external view of the second housing 6, and FIG. 10 is an enlarged view of the fixed piece 63. The power supply device 1 of the present embodiment is characterized in that the fixing piece 63 of the second housing 6 has a pressing portion 65. The other configurations are the same as those in the first embodiment, and the same reference numerals as those in the first embodiment are given and the description thereof is omitted.

  As described in the first embodiment, when the first casing 5 and the second casing 6 are fastened, first, the dowel 518 (convex portion) is passed through the through hole 64. Then, the first casing 5 and the second casing 6 are caulked and fixed by crushing (plastically deforming) the tip of the dowel 518 protruding upward from the through hole 64 with a press jig such as a caulking punch. (Conclude). However, as shown in FIG. 11, when the press jig 7 presses and crushes the dowels 518, the dowels 518 are buckled, and there is a possibility that swelling occurs near the center of the dowels 518. At this time, the fixing piece 63 floats from the bottom surface 51 due to the swelling of the dowel 518, and there is a problem that the second housing 6 rattles against the first housing 5 after caulking and fixing.

  Therefore, the fixing piece 63 of this embodiment has a pair of pressing portions 65 that are pressed against the bottom surface 51 by the pressing jig 8. The holding portions 65 are rectangular wide portions that are formed on the left and right sides of the through-hole 64 and project in the left and right directions with respect to the fixed piece 63 of the first embodiment. Therefore, the fixing piece 63 according to the present embodiment includes the pair of pressing portions 65, so that the left and right direction of the distal end portion with respect to the width in the left and right direction of the base end portion (connection portion with the second housing 6). The width of becomes wide.

  When the first casing 5 and the second casing 6 are caulked and fixed in the power supply device of the present embodiment, first, as shown in FIG. 12, the pressing portion 65 is pressed by the pressing jig 8 provided in the caulking apparatus. Is pressed against the bottom surface 51. The caulking device includes a pair of pressing jigs 8, and the pair of pressing jigs 8 presses a pair of pressing portions 65 formed on the left and right sides of the through hole 64 against the bottom surface 51. Then, in a state where the pressing portion 65 is pressed against the bottom surface 51, the press jig 7 of the caulking device descends and presses the dowel 518 downward, so that the dowel 518 is crushed and plastically deformed, and the first casing. The body 5 and the second housing 6 are fixed by caulking.

  As described above, in the present embodiment, by including the pressing portion 65 pressed against the bottom surface 51 by the pressing jig 8, it is possible to prevent the fixed piece 63 from floating from the bottom surface 51. Therefore, rattling of the second casing 6 with respect to the first casing 5 after caulking and fixing can be prevented.

  Further, in order to more reliably prevent the second housing 6 from rattling with respect to the first housing 5, when the press jig 7 presses the dowel 518, the press jig 8 has the through holes 64 ( It is desirable to hold down a place closer to the dowel 518). For this purpose, first, the pressing jig 8 presses the pressing portion 65 including the peripheral edge portion of the through hole 64 against the bottom surface 51. Here, it is necessary to secure a space for the dowels 518 that expand radially by being crushed by the press jig 7. Therefore, the pressing jig 8 moves leftward or rightward about the dowel 518 and away from each other as the pressing jig 7 descends while maintaining the pressing force on the pressing portion 65. . By moving the pressing jig 8 in this way, it is possible to secure a space for the dowel 518 that is expanded by being crushed by the pressing jig 7.

  In this manner, the holding jig 8 presses the peripheral edge of the through hole 64 against the bottom surface 51, and the holding jig 8 moves so as to secure a space for the dowel 518 further expanding, whereby the second jig with respect to the first housing 5 is moved. Shaking of the housing 6 can be more reliably prevented.

1 Power supply device 2 Circuit element 3 Substrate 32 Via (communication hole)
4 Case 5 First housing 51 Bottom surface 52a, 52b Stay portion (fixed portion)
6 Second housing

Claims (9)

A power supply circuit that converts input power into predetermined output power and supplies it to a load;
A circuit board on which circuit elements constituting the power supply circuit are mounted only on one surface;
A first casing formed by metal pressing and having a flat bottom surface; and a second casing molded by metal pressing; the first casing and the second casing; A space is formed inside by combining, and a case for storing the substrate in the space,
The substrate is placed on the bottom surface in a state where the other surface on which the circuit element is not mounted is opposed to the bottom surface, and a communication hole is formed for communicating one surface side of the substrate with the other surface side ,
Copper is provided on the inner peripheral surface and the opening peripheral edge of the communication hole in the substrate,
The communication hole is formed under a pad on which the circuit element is mounted, and the peripheral edge of the opening on the other surface side is thermally coupled to the bottom surface .   The copper is connected to the ground of the power circuit,
  The case is connected to ground
  The power supply device according to claim 1.   The first casing includes a fixing portion that is fixed to a structure.
  The power supply apparatus according to claim 1, wherein the fixing portion is integrally formed with the first housing.   The second housing is formed in a box shape with one side open,
  4. The power supply device according to claim 1, wherein the first housing has a groove into which the opening end of the second housing fits in the bottom surface. 5.   A convex portion is formed on one of the first housing and the second housing, and a through hole through which the convex portion passes is formed on the other.
  The said 1st housing | casing and the said 2nd housing | casing are fastened by the plastic deformation of the said convex part protruded from the said through-hole, The any one of the Claims 1 thru | or 4 characterized by the above-mentioned. The power supply described.   The first housing has a fixed portion fixed to a structure, and the convex portion is formed on the bottom surface.
  The second casing is formed in a box shape with one surface open, and has the through-hole through which the convex portion passes,
  The power supply device according to claim 5, wherein the fixing portion is integrally formed with the first housing and is formed on a protruding direction side of the convex portion with respect to the bottom surface.   The first housing has the convex portion formed on the bottom surface,
  The second housing includes a fixing piece that faces the bottom surface and includes the through hole through which the convex portion passes, and a pressing portion that is pressed against the bottom surface by a jig,
  In a state where the pressing portion is pressed against the bottom surface by the jig, the convex portion protruding from the through hole is plastically deformed, and the first casing and the second casing are fastened. The power supply device according to claim 5 or 6, characterized in that   The fixed piece has a pair of the pressing portions,
  The power supply device according to claim 7, wherein the through hole is formed between the pair of pressing portions.   The power supply device according to any one of claims 1 to 8,
  A vehicle headlamp device comprising: a headlamp powered by the power supply device

Images