JP2016063200A - Substrate mounting structure and power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow for suitable pressing of a plurality of components on a substrate.SOLUTION: In a substrate mounting structure of a power supply device 1, pressing members 30, 40, 50 have a support to be fixed to a housing 10, and a plurality of pressing parts projecting from the support and elastically pressing a plurality of components, respectively, toward the housing, and arranged oppositely across the support. The support is fixed to the housing 10 at a position where the substrate is arranged below the support. Since the pressing members 30, 40, 50 are configured to elastically pressing the components on the substrate, arranged on both sides across the support, by means of a plurality of pressing parts, the plurality of components on the substrate can be pressed suitably.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a board mounting structure and a power supply device to which the board mounting structure is applied.

  Since a semiconductor used in a general electronic device is an electronic component that generates heat at a high temperature, a metal member is pressed against a heat radiating member such as a heat sink. As a pressing member that presses a plurality of electronic components at a time, as shown in Patent Document 1, for example, a supporting portion that is supported and fixed to the casing on the outer peripheral side of the substrate and has one end branched in two And a pressing portion continuous to the branched tip of the support portion, and a configuration in which the plurality of pressing portions respectively press the electronic components on the substrate is shown. Moreover, in patent document 1, as another form of the metal fitting to fix, it fixes to a housing | casing on the outer side rather than the edge part of a board | substrate, and it swells below from a support part and the arch-shaped support part which bridge | crosses on a board | substrate A configuration including a spring portion is shown.

JP 2010-153722 A

  However, in the pressing member described in Patent Document 1, when the mounting position of the electronic component to be pressed and supported is far from the end of the substrate, the pressing force on the electronic component is reduced, and the electronic component is preferably pressed. May be difficult. In patent document 1, the press member which has an arch-shaped support part is also made | formed as a press member for pressing the electronic component spaced apart from the board | substrate edge part. However, when the length of the arch-shaped support portion that spans the substrate is long, the central portion is easily bent, and the pressing force by the spring portion may be insufficient.

  The present invention has been made in view of the above, and an object thereof is to provide a board mounting structure capable of suitably pressing a plurality of components on a board, and a power supply device to which the board mounting structure is applied. To do.

  To achieve the above object, a board mounting structure according to an embodiment of the present invention includes a housing, a board placed on the housing, and a plurality of components mounted on the board. The mounting structure includes a pressing member that presses the plurality of components toward the housing, and the pressing member protrudes from the supporting portion and a support portion fixed to the housing. A plurality of pressing portions that elastically press each of the components toward the housing, and the plurality of pressing portions are arranged to face each other with the support portion interposed therebetween, and the support portion is the support portion The substrate is fixed to the housing at a position where the substrate is disposed below the housing.

  In the board mounting structure described above, the pressing member is disposed to face the support portion fixed to the housing and the plurality of components that protrude from the support portion and elastically press the components toward the housing and sandwich the support portion. The support part is fixed to the housing at a position where the substrate is disposed below the support part. In this way, the components on the board arranged on both sides of the support portion of the pressing member are elastically pressed by the plurality of pressing portions, respectively, so that the plurality of components are pressed by the plurality of components on the substrate. Can be suitably performed.

  Here, the support portion has a substantially rectangular shape extending in one direction when viewed from above, and the plurality of pressing portions are connected to two long sides facing each other in the support portion, and the 2 At least one of the two long sides may be provided with a plurality of the pressing portions spaced from each other. In this case, since many press parts can be provided with respect to one support part, more parts can be pressed suitably.

  The support portion includes a plate-like base portion and a side wall portion extending upward from two long sides of the base portion, and the plurality of pressing portions are upper side end portions of the side wall portion. It can be set as the aspect provided in. In this case, by having the side wall portion, the rigidity of the support portion is improved, and the pressing force by the plurality of pressing portions can be suitably maintained.

  Moreover, it is a leaf | plate spring extended below from the said support part, Comprising: It can be set as the aspect further provided with the board | substrate press part which elastically presses the said board | substrate. When the substrate is provided below the support portion, the substrate itself can be suitably pressed by providing the substrate pressing portion.

  At least some of the plurality of pressing portions may have different widths. In this case, a suitable pressing force can be realized according to the type of components on the substrate.

  A power supply device according to an aspect of the present invention is a power supply device having the above-described substrate mounting structure, wherein the substrate includes a primary side circuit and a secondary side circuit, and the pressing member includes The pressing member presses the component of the primary circuit by the pressing portion on one long side, and elastically presses the component of the secondary circuit by the pressing portion on the other long side different from the one It can be set as the mode to do.

  In this way, the primary side circuit component is pressed by the pressing portion on one long side of the pressing member, and the secondary circuit component is elastically pressed by the other long side pressing portion different from the one. By doing so, the primary circuit and the secondary circuit on the circuit board 20 can be arranged in a state of being substantially partitioned by the pressing member, so that the component arrangement on the board and the wiring property of the pattern are excellent.

  ADVANTAGE OF THE INVENTION According to this invention, the board | substrate mounting structure which can perform suitably the press of several components on a board | substrate, and the power supply device to which this board | substrate mounting structure was applied are provided.

It is a perspective view explaining the structure of the power supply device which concerns on embodiment of this invention. It is a perspective view of the 1st press member. It is a front view of the 1st press member. It is a perspective view of the 2nd press member. It is a front view of the 2nd press member. It is a perspective view of a 3rd press member. It is a disassembled perspective view explaining attachment of the 1st-3rd press member. It is an exploded perspective view explaining attachment of the 1st press member and the 2nd press member. It is an enlarged view of the 1st-3rd press member vicinity.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a perspective view illustrating a configuration of a power supply device 1 according to the present embodiment. In FIG. 1, a part of the power supply device (switching power supply device) is shown broken away. FIG. 2 is a perspective view of the first pressing member, and FIG. 3 is a front view of the first pressing member. FIG. 4 is a perspective view of the second pressing member, and FIG. 5 is a front view of the second pressing member. FIG. 6 is a perspective view of the third pressing member. 7 and 8 are exploded perspective views for explaining the attachment of the first to third pressing members, and FIG. 9 is an enlarged view of the vicinity of the first to third pressing members. In each figure, XYZ axes are described as necessary for the explanation of the configuration.

  The power supply device 1 generates a DC output voltage by, for example, converting (decreasing) a DC voltage input from a high voltage battery connected to an input terminal, and outputs the DC output voltage from the output terminal to the low voltage battery. It functions as a converter. Specifically, the DC input voltage supplied from the primary side input terminal is switched to generate an input AC voltage, which is supplied to the primary coil of the transformer. The generated input AC voltage is transformed and output as an output AC voltage from the secondary coil of the transformer. The output AC voltage is rectified by the rectifier circuit and smoothed by the smoothing circuit, and is output as a DC output voltage from the secondary output terminal.

  As shown in FIG. 1, the power supply device 1 (DC-DC converter) has a circuit board 20 mounted on a base plate 11 that constitutes the bottom surface of the housing 10. A primary side switching element 21 (four switching elements are shown in the present embodiment) constituting a switching circuit, a primary side resonance coil 22, transformers 23 and 24, a secondary side coil 25, and the like are arranged. . A first pressing member 30, a second pressing member 40, and a third pressing member 50 are arranged on the circuit board 20.

  The base plate 11 that constitutes the bottom surface of the housing 10 that accommodates the circuit board 20 or the like has a function as a heat dissipation member that cools the circuit board 20, each element on the circuit board 20, a pattern that connects these elements, and the like. Specifically, the housing 10 including the base plate 11 is made of a metal such as aluminum, and on the back surface side of the base plate 11 (the lower side in FIG. 1: the surface side opposite to the surface on which each element or substrate is fixed). A fin for heat dissipation is attached. Then, the heat radiation fins are air-cooled and the back surface side of the base plate 11 is cooled, so that the heat generated in the circuit board 20 fixed to the front surface side of the base plate 11 and each element is radiated to the outside through the base plate 11. Is done. Thus, the base plate 11 also functions as a heat sink. Instead of a configuration in which fins for heat dissipation by air cooling are attached, a cooling liquid channel for water cooling may be provided on the back surface side of the base plate 11, and the back surface side of the base plate 11 may be water cooled.

  The circuit board 20 placed on the housing 10 is a flat printed board, and a circuit of a power supply device is provided inside. In addition to the electronic components described above, components are mounted on the circuit board 20. A heat conductive material for insulating the circuit board 20 and the housing 10 and transferring heat from the circuit board 20 to the base plate 11 of the housing 10 is provided on the lower surface side of the circuit board 20 as necessary. The heat is dissipated from the lower surface side of the circuit board 20 to the bottom surface portion of the housing 10 through the thermally conductive material.

  In addition, the power supply device 1 according to the present embodiment is provided with respect to the exterior cover that covers the housing 10, the input and output terminal blocks for electrical connection with external devices, and the above-described elements. A control circuit is provided that transmits a driving signal to control driving of each element.

  The plurality of switching elements 21 and the primary resonance coil 22 on the circuit board are attached so as to be arranged in one direction (Y-axis direction) near the center of the circuit board 20. The transformers 23 and 24 and the secondary coil 25 are also attached so as to be arranged in one direction (Y-axis direction) near the center of the circuit board 20. The row in which the plurality of switching elements 21 and the primary side resonance coil 22 are arranged and the row in which the transformers 23 and 24 and the secondary side coil 25 are arranged are provided apart from each other. In FIG. 1, a core 22 </ b> A constituting the primary side resonance coil 22, transformer cores 23 </ b> A and 24 </ b> A constituting the transformers 23 and 24, and a core 25 </ b> A inserted through the secondary side coil 25 are illustrated. And the 1st press member 30 and the 2nd press member 40 which were arranged in the same direction (Y-axis direction) are pressing these components. Since these components generate heat at a high temperature, it is necessary to dissipate heat by thermally connecting to the housing 10 via a thermally conductive material in the same manner as the circuit board 20. The first pressing member 30 and the second pressing member 40 are provided to elastically press these components.

  Similarly, the third pressing member 50 is provided to elastically press the plurality of transistors 26 on the circuit board 20.

  Although the description of the other electronic components shown in FIG. 1 is omitted, the primary side switching element 21 and the primary side resonance coil 22 are arranged with respect to the first pressing member 30 and the second pressing member 40. On the side (X-axis negative side), electronic components included in the primary side circuit are arranged. Further, on the side (X axis positive side) where the transformers 23 and 24 and the secondary coil 25 are disposed with respect to the first pressing member 30 and the second pressing member 40, the electrons included in the secondary circuit. Parts are placed.

  Next, a pressing member that presses a plurality of components toward the base plate 11 of the housing 10 on the circuit board 20 will be described with reference to FIGS.

  First, the first pressing member 30 will be described with reference to FIGS. 2 and 3. The first pressing member 30 is made of a metal material, and is manufactured, for example, by punching a metal plate and bending it. As shown in FIGS. 2 and 3, the first pressing member 30 includes a support portion 31 that extends along the arrangement direction (Y-axis direction) of electronic components such as the primary-side switching element 21, and two support portions 31. A plurality of pressing portions 32 extending from one long side in a direction (X-axis direction) orthogonal to the extending direction of the support portion 31 (Y-axis direction). The support portion 31 has a substantially rectangular shape extending in one direction (Y-axis direction) when viewed from above, but in order to increase the rigidity, the plate-like base portion 33 and the two long sides of the base portion are respectively upward. Side wall portions 34A and 34B formed by bending are configured.

  On the side wall portion 34A side, pressing portions 32A to 32D are provided that protrude outward from the upper end portion thereof (on the opposite side to the base portion 33 side: the X-axis negative direction). The pressing portions 32A to 32D each have a spring portion 321 having elasticity that extends along the X-axis direction and is inclined downward (Z-axis negative direction), and a contact portion 322 bent upward from one end of the spring portion 321. And have. Similarly, on the side wall portion 34B side, pressing portions 32E to 32H are provided that protrude outward from the upper end portion thereof (on the opposite side to the base portion 33 side: the X-axis positive direction). The pressing portions 32E to 32H also have a spring portion 321 and an abutting portion 322, similarly to the pressing portions 32A to 32D. As described above, the pressing portions 32A to 32D and the pressing portions 32E to 32H are arranged to face each other with the support portion 31 interposed therebetween.

  The base 33 of the support 31 is provided with three screw holes 35 </ b> A to 35 </ b> C (both ends and middle) for fixing the first pressing member 30 to the housing 10 with screws. A through hole 36 for positioning is provided in the vicinity of the screw hole 35A on one end (Y axis negative side). The through-hole 36 has a function of restricting the rotation of the first pressing member 30 in the horizontal direction (XY plane) by inserting a protrusion on the housing 10 side during assembly to make it a long hole shape with positioning. .

  In addition, the base portion 33 is provided with an opening portion 37 and a leaf spring-like substrate pressing portion 38 having elasticity that extends so as to incline downward (Z-axis negative direction) from one side of the opening portion 37. The board pressing portion 38 has a function of regulating the floating of the circuit board 20 itself by directly elastically pressing the circuit board 20.

  The pressing portions 32A to 32H can change the shape according to the arrangement of the object to be pressed and the magnitude of the force required for pressing. In the first pressing member 30, for example, the pressing portion 32G and the pressing portion 32H are wider than the other pressing portions 32A to 32F. The pressing portions 32G and 32H are different from the pressing portions 32E and 32F in the inclination angle of the spring portion 321. Further, the spring portions 321 are inclined at angles different from those of the pressing portions 32E to 32H in the pressing portions 32A to 32D. Further, the height positions of the contact portions 322 are different (see FIG. 3). This is because the height position, shape, size, and the like of the component to be pressed are different for each component. Thus, the shape of the pressing portions 32A to 32H can be changed as appropriate. Moreover, it can change suitably also about the number of press parts. In addition, it is preferable to change the width | variety of a press part suitably also according to the three screw holes 35A-35C for screw-fixing the 1st press member 30 with respect to the housing | casing 10. FIG. Since the pressing portion provided at a position away from the screw hole tends to have a smaller pressing force than the pressing portion provided at a position close to the screw hole, the pressing portion of the pressing portion is maintained in order to maintain the pressing force. The width may be increased.

  Next, the second pressing member 40 will be described with reference to FIGS. 4 and 5. Since the second pressing member 40 is used in combination with the first pressing member 30, the shape thereof is similar to that of the first pressing member 30. That is, the second pressing member 40 includes a support portion 41 extending along the arrangement direction (Y-axis direction) of electronic components such as the primary side switching element 21 and the two long sides of the support portion 41. And a plurality of pressing portions 42 extending in a direction (X-axis direction) orthogonal to the extending direction (Y-axis direction). Further, the support portion 41 has a substantially rectangular shape extending in one direction (Y-axis direction) when viewed from above, and is formed by bending upward from two long sides of the plate-like base portion 43 and the base portion 43. Side wall portions 44A and 44B.

  Further, on the side wall portion 44A side, there are provided pressing portions 42A and 42B that protrude outward from the end portion thereof (on the opposite side to the base portion 43 side: the X-axis negative direction). On the side wall portion 44B side, pressing portions 42C and 42D are provided that protrude outward from the end portion (on the opposite side to the base portion 43 side: the X-axis positive direction). The pressing portions 42C and 42D also have a spring portion 421 and an abutting portion 422, similarly to the pressing portions 42A and 42B. The pressing portions 42A and 42B and the pressing portions 42C and 42D are arranged to face each other with the support portion 41 interposed therebetween.

  Screw holes 45 </ b> A and 45 </ b> B for fixing the second pressing member 40 to the housing 10 by screws are provided at both ends of the base portion 43 of the support portion 41. A through hole 46 for positioning is provided in the vicinity of the screw hole 45A at one end (Y axis positive side). The through-hole 46 has a function of restricting the rotation of the second pressing member 40 in the horizontal direction (XY plane) by inserting a protrusion on the housing 10 side during assembly to form a long hole with positioning. .

  The base 43 is provided with an opening 47 and a leaf spring-like substrate pressing portion 48 having elasticity extending so as to incline downward (Z-axis negative direction) from one side of the opening 47. A circuit pattern of the secondary coil 25 and the transformers 23 and 24 is wired on the circuit board 20 positioned below the board pressing portion 48. In order to efficiently dissipate the heat generated by the coil pattern to the housing 10, a substrate pressing portion 48 is provided.

  Next, the third pressing member 50 will be described with reference to FIG. The third pressing member 50 is made of a metal material, and is manufactured, for example, by punching a metal plate and bending it. The third pressing member 50 includes a plate-like support 51 extending along the X-axis direction, and a direction (Y-axis) perpendicular to the extending direction (X-axis direction) of the support 51 from the two long sides of the support 51. A plurality of pressing portions 52 extending in the axial direction. The support part 51 consists of a substantially rectangular base part, and has two long sides which oppose. From the long side on one side of the support part 51, pressing parts 52 </ b> A and 52 </ b> B that protrude outward (opposite side to the support part 51 side: Y-axis negative direction) are provided. From the long side of the other side of the support part 51, pressing parts 52C and 52D that protrude outward (on the opposite side to the support part 51 side: the Y-axis positive direction) are provided. Each of the pressing parts 52A to 52D extends along the X-axis direction and has an elasticity that extends so as to be inclined downward (Z-axis negative direction), and a contact part 522 bent upward with respect to the spring part 521. And have. The pressing portions 52A and 52B and the pressing portions 52C and 52D are disposed to face each other with the support portion 51 interposed therebetween.

  In the center of the support portion 51, a screw hole 55 for fixing the third pressing member 50 to the housing 10 with a screw is provided. In the vicinity of the screw hole 55, two through holes 56A and 56B for positioning with the screw hole 55 interposed therebetween are provided. The through holes 56A and 56B have a function of regulating the horizontal direction (XY plane) of the third pressing member 50 as well as positioning by inserting a projection on the housing 10 side during assembly.

  Next, a method for attaching the first to third pressing members will be described with reference to FIGS. As shown in FIG. 7, screw holes 111 and 112 for fixing screws of the first pressing member 30 and fixing screws of the first pressing member 30 and the second pressing member 40 are formed in the base plate 11 of the housing 10. , A screw hole 114 for fixing the screw of the second pressing member 40, and a screw hole 115 for fixing the screw of the third pressing member 50 are provided. Still, in the vicinity of the screw hole 111, a convex portion 121 used for positioning the first pressing member 30 is provided. Similarly, a convex portion 122 used for positioning the second pressing member 40 is provided in the vicinity of the screw hole 114, and a convex portion 123A used for positioning the third pressing member 50 is provided in the vicinity of the screw hole 115. 123B is provided. The screw holes 111 to 114 are formed in projecting portions 131 to 134 that project upward from the surface of the base plate 11, respectively. Further, the convex portion 121 is formed on the same protruding portion 131 as the screw hole 111, and the convex portion 122 is formed on the same protruding portion 134 as the screw hole 114. Further, the screw hole 115 and the convex portions 123A and 123B are formed in a protruding portion 135 that protrudes upward from the surface of the base plate 11.

  In addition, the surface of the base plate 11 of the housing 10 is uneven so that the contact area with the circuit board 20 is large. In particular, the surface of the base plate 11 protrudes at a position corresponding to the back surface of the switching element 21 or the like, which is a heat generating component, and is shaped so as to contact the back surface of the circuit board 20. Concavities and convexities are formed in accordance with the shapes of the primary side resonance coil 22, the transformers 23 and 24, the secondary side coil 25, the transistor 26, and the like. As a result, a large heat transfer path is secured when the circuit board 20 with the electronic components attached is mounted on the housing 10, and heat dissipation is improved.

  The circuit board 20 is formed with an opening 212 corresponding to the protruding portion 132 in which the screw hole 112 is formed and an opening 213 corresponding to the protruding portion 133 in which the screw hole 113 is formed. In addition, a notch 215 cut out from the end of the circuit board 20 is formed at a position corresponding to the protrusion 135.

  As shown in FIGS. 7-9, the 1st press member 30, the 2nd press member 40, the 3rd press member 50, and the circuit board 20 are the screw hole provided in the press member, and the opening provided in the circuit board. And screw holes provided in the housing 10 are attached to the housing 10 so as to correspond to each other, and then fixed by screws 61 to 65. At this time, in the first pressing member 30, the second pressing member 40, and the third pressing member 50, the convex portions 121, 122, 123A, and 123B are inserted into the positioning through holes 36, 46, 56A, and 56B. Attached to.

  Here, as shown in FIG. 8, in the first pressing member 30 and the second pressing member 40, the screw hole 35B of the first pressing member 30 and the screw hole 45B of the second pressing member 40 are fixed by the same screw. Thus, the screw hole 35B of the first pressing member 30 and the screw hole 45B of the second pressing member 40 are assembled so as to overlap each other. At this time, since the side wall portions 34A and 34B of the first pressing member 30 and the side wall portions 44A and 44B of the second pressing member 40 restrict the rotation, positioning can be performed more reliably.

  In addition, regarding the 3rd press member 50, since two convex part 123A, 123B is penetrated by through-hole 56A, 56B, rotation of a horizontal direction is controlled.

  As shown in FIG. 9, when the first pressing member 30 and the second pressing member 40 are fixed at the above positions, the pressing portions 32 </ b> A to 32 </ b> D of the first pressing member 30 press the switching element 21. The pressing portions 32E and 32F press the core 25A of the secondary coil 25, and the pressing portions 32G and 32H press the transformer core 24A of the transformer 24. Further, the pressing portions 42A and 42B of the second pressing member 40 press the core 22A inserted through the primary resonance coil 22, and the pressing portions 42C and 42D press the transformer core 23A of the transformer 23. The substrate pressing portion 38 of the first pressing member 30 presses the circuit board 20 below the support portion 31 of the first pressing member 30, and the substrate pressing portion 48 of the second pressing member 40 is the second pressing member 40. The circuit board 20 below the support portion 41 is pressed.

  Here, the switching element 21, the core 22A of the primary side resonance coil 22, the transformer cores 23A and 24A of the transformers 23 and 24, and the core 25A of the secondary side coil 25 are provided on the circuit board 20, respectively. There is a circuit board 20 below them. As described above, the first pressing member 30 has the circuit board 20 disposed below the support portion 31 and a circuit below each of the plurality of pressing portions 32 </ b> A to 32 </ b> H provided to face each other via the support portion 31. The substrate 20 is fixed to the housing 10 at a position where the substrate 20 is disposed. Similarly, the second pressing member 40 includes the circuit board 20 below the support part 41 and a circuit board below each of the plurality of pressing parts 42 </ b> A to 42 </ b> D provided to face each other via the support part 41. It is fixed with respect to the housing 10 at a position where 20 is arranged. Note that “the circuit board is disposed below the support part” means that at least a part of the support part overlaps the circuit board when the circuit board and the pressing member are viewed from above.

  In the third pressing member 50, the four pressing portions 52A to 52D press the four transistors 26, respectively. Each of the four transistors 26 is provided on the circuit board 20. Therefore, the circuit board 20 is also arranged below the support portion 51 for the third pressing member 50, and the circuit board is provided below each of the plurality of press portions 52 </ b> A to 52 </ b> D provided to face each other via the support portion 51. It is fixed with respect to the housing 10 at a position where 20 is arranged.

  Thus, in the board mounting structure in the power supply device 1 according to the present embodiment, the pressing members 30, 40, and 50 are each provided with a support portion fixed to the housing 10 and a plurality of components protruding from the support portion. A plurality of pressing portions that are elastically pressed toward the housing and are opposed to each other with the supporting portion interposed therebetween, and the supporting portion is placed on the housing 10 at a position where the substrate is disposed below the supporting portion. Fixed. As described above, the pressing members 30, 40, and 50 are configured to elastically press the components on the substrate arranged on both sides of the support portion with the plurality of pressing portions, respectively, so that the plurality of components are mounted on the substrate. It is possible to suitably press the plurality of parts.

  Further, the pressing members 30, 40, 50 have a substantially rectangular support portion, and the plurality of pressing portions are connected to two long sides, respectively, and a plurality of pressing portions are provided on at least one long side. By having, it is possible to suitably press more parts using a plurality of pressing portions. Moreover, when it is set as such a structure, since the structure itself of a press member can be simplified, the manufacturing process of a press member itself can be simplified and cost reduction can also be aimed at.

  Moreover, in the 1st press member 30 and the 2nd press member 40, a support part has a side wall part extended upward from two long sides of a plate-shaped base part and a base part. In this case, the rigidity of the support portion is improved, and the pressing force by the plurality of pressing portions can be suitably maintained.

  The first pressing member 30 and the second pressing member 40 include a substrate pressing portion that is a leaf spring extending downward from the support portion. When there is a substrate below the pressing member, the substrate itself can be suitably pressed by providing the substrate pressing portion.

  In addition, at least a part of the plurality of pressing portions has a configuration in which the widths thereof are different, so that a suitable pressing force can be realized according to the type of component on the substrate.

  In addition, the power supply device 1 according to the present embodiment includes the above-described board mounting structure, and the first pressing member 30 and the second pressing member 40 have a pressing portion on one long side (X-axis negative side). The component of the secondary circuit is pressed, and the component of the secondary circuit is elastically pressed by the other long side (X-axis positive side) pressing portion different from the one. In this way, the primary side circuit and the secondary side circuit on the circuit board 20 are arranged by distinguishing and arranging the primary side circuit component and the secondary side circuit component across the pressing member. It can be arranged in a state of being substantially partitioned by the pressing member. Thereby, the component arrangement on the board and the wiring property of the pattern are improved.

  Although the embodiment of the present invention has been described above, the substrate mounting structure and the power supply device according to the present invention are not limited to the above, and various modifications can be made.

  For example, the first pressing member 30 and the second pressing member 40 are arranged in series in the Y-axis direction, and are fixed to the housing 10 by one screw 63 at one end portion. Instead of the members (the first pressing member 30 and the second pressing member 40), one pressing member may be used. In this case, although the number of parts of the power supply device 1 as a whole can be reduced, it is necessary to elastically press and fix a large number of parts at once, so that the work related to fixing of the pressing member may be complicated. . Therefore, it is preferable to appropriately adjust the length of the pressing member (particularly the length of the support portion) according to the number of parts to be pressed by the pressing member. Further, the number and arrangement of the pressing portions can be appropriately adjusted according to the component to be pressed.

  DESCRIPTION OF SYMBOLS 1 ... Power supply device, 10 ... Housing | casing, 20 ... Circuit board, 30 ... 1st press member, 40 ... 2nd press member, 50 ... 3rd press member, 61-65 ... Screw.

Claims (6)

A board mounting structure comprising a housing, a substrate placed on the housing, and a plurality of components mounted on the substrate,
A pressing member that presses the plurality of components toward the housing;
The pressing member includes a support portion fixed to the housing, and a plurality of pressing portions that protrude from the support portion and elastically press the plurality of components toward the housing, respectively.
The plurality of pressing portions are arranged to face each other with the support portion interposed therebetween,
The substrate mounting structure, wherein the support portion is fixed to the housing at a position where the substrate is disposed below the support portion. The support portion has a substantially rectangular shape extending in one direction when viewed from above,
The plurality of pressing portions are connected to two long sides facing each other in the support portion,
The substrate mounting structure according to claim 1, wherein a plurality of the pressing portions spaced apart from each other are provided on at least one of the two long sides. The support part has a plate-like base part, and a side wall part extending upward facing the two long sides of the base part,
The substrate mounting structure according to claim 1, wherein the plurality of pressing portions are provided at an upper end portion of the side wall portion.   The board mounting structure according to any one of claims 1 to 3, further comprising a board pressing portion that is a leaf spring extending downward from the support portion and presses the board.   The board | substrate mounting structure as described in any one of Claims 1-4 from which the width | variety differs in at least one part of these several press parts. A power supply device comprising the substrate mounting structure according to any one of claims 1 to 5,
The substrate includes a primary circuit and a secondary circuit,
The pressing member presses a component of the primary circuit by the pressing portion on one long side, and presses a component of the secondary circuit by the pressing portion on the other long side different from the one Power supply.

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