JP5938656B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical connection box that is mounted on an automobile or the like and to which an electrical component such as a connector is connected, and in particular, an electrical connection provided with a side component connecting portion to which the electrical component is connected from the side of a case. It is about the box.

  2. Description of the Related Art Conventionally, automobiles and the like have been provided with an electrical connection box such as a junction box that collects and connects electrical components such as connectors and fuses. In particular, in recent years, in order to connect a larger number of electrical components, as described in Japanese Patent Application Laid-Open No. 2012-115053 (Patent Document 1), the side of the case is also used so that the electric can be applied from the side of the case. There are some which are provided with a side part connecting part which can be connected to the part.

  By the way, electrical components provided in automobiles and the like are steadily increasing, and it is required that a larger connector and a larger number of fuses can be connected to the electrical junction box. In view of this, it has been studied to increase the size of the side part connecting portion provided on the side of the case so that a larger connector and a larger number of fuses can be connected.

  However, as described in Patent Document 1, an L-shaped terminal that is bent from the printed circuit board and then bent into an L-shape is used as a board terminal in the side part connection portion in the conventional electrical junction box. A plurality of L-shaped terminals are arranged in multiple stages. Therefore, in order to increase the size of the side component connecting portion, it is necessary to increase the protruding height dimension of the L-shaped terminal from the printed circuit board. However, if the L-shaped terminal is greatly protruded from the printed circuit board, a greater moment with the protruding height from the printed circuit board as the arm length is exerted on the connection portion of the L-shaped terminal with the printed circuit board when inserting or removing the electrical component. The connection reliability between the printed circuit board and the L-shaped terminal may be reduced. Further, when the protruding height of the L-shaped terminal from the printed circuit board becomes large, a large space is occupied above the printed circuit board, resulting in a decrease in space efficiency and a large number of L-shaped terminals arranged densely. However, there is a limit because the possibility of contact with each other becomes high, and there is a problem that the degree of freedom of layout on the case of the side part connecting portion is limited.

JP 2012-115053 A

  The present invention has been made in the background of the above-mentioned circumstances, and the solution to the problem is to improve the layout flexibility of the side component connecting portion while ensuring the connection reliability with the printed circuit board. An object of the present invention is to provide an electrical junction box having a novel structure.

According to a first aspect of the present invention, there is provided an electrical junction box provided with a side component connecting portion to which an electrical component is connected from the side of the case. The first printed circuit board and the second printed circuit board are connected to each other by inter-board connection terminals and accommodated in the case, and the second printed circuit board includes the first printed circuit board and the second printed circuit board. An electrical component connecting portion configured by board terminals erected vertically with respect to the second printed board is provided, and the second printed board is disposed in parallel with the side surface of the case, While the side component connecting portion is configured by the electrical component connecting portion, the first printed board has a board support member having an insertion hole into which the second printed board is inserted and supported. Provided Wherein the substrate support member, a first bolt fixing portion for bolting the first printed circuit board, and a second bolt fixing portion is provided with a bolt fixing the second printed circuit board, said substrate The support member protrudes in a direction opposite to the insertion direction of the second printed circuit board into the insertion hole and continues from the inner surface of the insertion hole, and the electrical component connecting portion in the second printed circuit board A support guide surface is formed so as to be superimposed on a surface on the opposite side of the mounting surface, and the second bolt fixing portion is provided on the support guide surface .

  In the present invention, the side component connecting portion is configured by arranging the second printed circuit board provided with the electric component connecting portion perpendicularly to the first printed circuit board. Thereby, the board terminal of the side component connecting portion can be projected linearly from the second printed circuit board without bending in an L shape, and the shape of the board terminal can be simplified. As a result, as compared with the case where the L-shaped terminals are arranged in multiple stages, a large number of board terminals can be arranged with higher density, and the board terminals can be arranged on the second printed board with a high degree of freedom in layout. Therefore, it is possible to increase the size of the side component connecting portion and the layout flexibility.

  Furthermore, since the board terminal of the side part connection part protrudes perpendicularly from the second printed board, it is possible to avoid generating a moment when inserting and removing the electrical component, and the connection between the board terminal and the printed board. The stress exerted on the part can be reduced. As a result, it is possible to reduce the risk of cracks occurring in the soldered portions of the substrate terminals, and to improve connection reliability.

  In addition, a substrate support member that supports the second printed circuit board perpendicularly to the first printed circuit board is bolted to both the first printed circuit board and the second printed circuit board. Thereby, it is possible to firmly support the second printed circuit board with respect to the first printed circuit board, and the first printed circuit board and the second printed circuit board can be inserted into and removed from the side component connecting portion. The stress exerted on the inter-substrate connection terminal for connecting the substrates can be reduced. As a result, the connection reliability between the first printed circuit board and the second printed circuit board can be ensured.

  The side part connecting part may be, for example, a connector connecting part to which a connector as an electric part is connected, or a fuse attaching part to which a fuse as an electric part is attached, and corresponds to various electric parts. Any of the above can be employed. Further, a plurality of side part connecting portions may be provided. The number of substrate support members is not limited. For example, the second printed circuit board may be supported by one substrate support member, or both side edges of the second printed circuit board may be supported by two substrate support members. It may be supported with a sandwiched between them.

Furthermore, in this aspect, when the second printed circuit board is inserted into the insertion hole of the substrate support member, the second printed circuit board can be guided by being brought into contact with the support guide surface to facilitate insertion. I can do it. Further, when an electrical component is connected to the side component connecting portion, the arm length of the moment exerted on the second printed circuit board from the electrical component by the second printed circuit board being brought into contact with the support guide surface. Therefore, the second printed circuit board can be more firmly supported, and the connection reliability with the first printed circuit board can be further improved. Then, by providing the second bolt fixing portion on the support guide surface, the second bolt fixing portion can be formed in a space efficient manner.

According to a second aspect of the present invention, in the one described in the first aspect, the other end of the inter-board connection terminal in which one end is soldered to the second printed board is the first. The first printed board is provided with a pair of board support members, and the inner surfaces of the insertion holes of the pair of board support members are inserted into through holes of one printed board and soldered. However, the side edge portion of the second printed circuit board is inserted into the U shape so as to sandwich the second printed circuit board from both sides.

  According to this aspect, the second printed circuit board is sandwiched between the pair of substrate support members, thereby positioning the second printed circuit board with respect to the first printed circuit board, and a plurality of protrusions protruding from the second printed circuit board. The end portion of the inter-substrate connection terminal can be aligned with the corresponding through hole of the first printed circuit board. As a result, a large number of inter-board connection terminals can be easily inserted into the through holes of the first printed board.

According to a third aspect of the present invention, in the first or second aspect, the inter-substrate connection terminal is supported by a pedestal made of synthetic resin, and the pedestal includes the first print. A bolt fixing part to be bolted to the board or the second printed board is provided.

  According to this aspect, when an electrical component is inserted into and removed from the side component connecting portion, the stress exerted on the inter-substrate connection terminal is effectively dispersed by the first printed circuit board or the second printed circuit board through the pedestal. I can do it. Thereby, the connection reliability with respect to the 1st printed circuit board of a connection terminal between board | substrates and a 2nd printed circuit board can be improved more. The pedestal may be provided on either the first printed board or the second printed board. For example, the other end of the inter-board connection terminal, one end of which is soldered to the second printed circuit board, is inserted through the through hole of the first printed circuit board while being inserted into the pedestal, and the pedestal is connected to the first printed circuit board. The pedestal may be bolted to the first printed circuit board by superimposing it on one printed circuit board.

According to a fourth aspect of the present invention, in the one described in any one of the first to third aspects, the electrical component is connected to the electrical component connection portion on the second printed circuit board and the case. A concave-convex fitting portion that is mutually fitted in a direction orthogonal to the direction is formed.

  According to this aspect, when the electrical component is inserted into and removed from the side component connecting portion, the second printed circuit board can be supported by the case together with the substrate supporting member of the first printed circuit board. Thereby, especially when a large-sized connector is connected to the side part connecting portion, the second printed circuit board can be firmly supported, and the transmission of stress to the inter-board connecting terminals can be reduced.

  In the present invention, the side component connecting portion is configured by arranging the second printed circuit board provided with the electrical component connecting portion perpendicularly to the first printed circuit board. Thereby, the board | substrate terminal which comprises a side component connection part can be protruded perpendicularly | vertically from a 2nd printed circuit board, and the shape of a board | substrate terminal can be simplified. As a result, it is possible to improve the degree of freedom of layout on the second printed circuit board of the electrical component connection part, that is, the degree of freedom of layout on the case of the side part connection part. And the board | substrate support member which supports the 2nd printed circuit board is bolt-fixed to both the 1st printed circuit board and the 2nd printed circuit board, and the 2nd printed circuit board is strengthened with respect to the 1st printed circuit board. Therefore, it is possible to reduce the stress exerted on the inter-substrate connection terminals when inserting / removing electrical components, and to ensure the connection reliability between the first printed circuit board and the second printed circuit board.

The top view of the electrical junction box as one embodiment of the present invention. II-II sectional drawing in FIG. The perspective view of the printed circuit board assembly which comprises the electrical-connection box shown in FIG. The top view which shows a board | substrate support member and a base together. The side view of a board | substrate support member.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, FIG. 1 and FIG. 2 show an electrical junction box 10 as an embodiment of the present invention. The electrical junction box 10 has a structure in which a printed circuit board assembly 18 is accommodated in a case 16 constituted by an upper case 12 and a lower case 14. In the following description, “upper” means the upper side in FIG. 2, and “lower” means the lower side in FIG.

  FIG. 3 shows the printed circuit board assembly 18. The printed circuit board assembly 18 has a structure in which a second printed circuit board 22 is vertically assembled to a first printed circuit board 20. A pair of board support members 26 a and 26 b are provided at the end 24 of the first printed board 20. The substrate support members 26a and 26b are made of synthetic resin. FIG. 4 shows the substrate support members 26a and 26b and a pedestal 46 described later, and FIG. 5 shows the substrate support member 26a. Since the substrate support members 26a and 26b have substantially the same shape, the common shape will be described below by taking the substrate support member 26a as an example, and the substrate support member 26b has the same reference numeral in the figure. The description will be omitted by attaching.

  The substrate support member 26a has a substantially rectangular block shape. The board support member 26a is formed with an insertion protrusion 28 that protrudes downward. The substrate support member 26a is formed with a first bolt fixing portion 30 provided with a screw hole. The first bolt fixing portion 30 is formed to protrude rearward (downward in FIG. 4) of the substrate support member 26a.

  Further, an insertion hole 32 is formed in the substrate support member 26a. The insertion hole 32 is formed to open upward and in the opposing direction of the substrate support member 26a and the substrate support member 26b. As a result, the inner surface 34 of the insertion hole 32 has a U-shape when viewed from above (see FIG. 4). The width dimension w of the insertion hole 32 is slightly larger than the thickness dimension t of the second printed circuit board 22. The substrate support member 26a is formed with a support plate portion 36 that continuously protrudes upward from a wall portion on the rear side (lower side in FIG. 4) of the insertion hole 32. A support guide surface 38 that continuously protrudes upward from the inner surface 34 of the insertion hole 32 is formed by the front side surface (upper side in FIG. 4). Thereby, the insertion hole 32 and the 1st bolt fixing | fixed part 30 are formed in the other side on both sides of the support plate part 36. As shown in FIG. The support plate portion 36 is formed with a second bolt fixing portion 40 in which screw holes are formed. Although illustration is omitted, a screw hole formed in the second bolt fixing portion 40 is opened in the support guide surface 38.

  On the other hand, the substrate support member 26b is formed with a longitudinally extending portion 41 protruding to the opposite side (right side in FIG. 4) to the substrate support member 26a. The first bolt fixing portion 30 of the substrate support member 26 b is formed to protrude in the same direction as the extension portion 41.

  The board supporting members 26 a and 26 b are inserted into through holes (not shown) in which the insertion protrusions 28 penetrate the first printed circuit board 20, and the bolts 42 sandwich the first printed circuit board 20 and the first printed circuit board 20. By being screwed to the bolt fixing part 30, the bolt 42 is fixed to the first printed circuit board 20. Thereby, the board | substrate support member 26a and the board | substrate support member 26b are opposingly arranged by the edge part 24 of the 1st printed circuit board 20 with the clearance gap mutually.

  On the other hand, a plurality of inter-substrate connection terminals 44 a to 44 d are projected from the lower end 45 of the one surface 43 of the second printed circuit board 22. The inter-substrate connection terminals 44a to 44d are formed of a metal wire, and have an L shape with a middle portion bent at a right angle. The board-to-board connection terminals 44a to 44d are different in length from each other, and the length is increased in the order of the board-to-board connection terminals 44a to 44d. One end of the inter-board connection terminals 44a to 44d is inserted into the through hole of the second printed board 22 and soldered, so that the other end protrudes downward.

  The inter-board connection terminals 44a to 44d are supported by a base 46 made of synthetic resin. The pedestal 46 has a longitudinal shape, and bolt fixing portions 47 and 47 are provided at both ends in the longitudinal direction. As is apparent from FIG. 4, the longitudinal dimension of the pedestal 46 is made smaller than the opposing distance between the substrate support member 26a and the substrate support member 26b. Then, the end of the inter-board connection terminal 44 on the second printed circuit board 22 side is inserted into the pedestal 46 and the bolt fixing parts 47 and 47 of the pedestal 46 are fixed to the second printed circuit board 22 with bolts 48 and 48. Has been. In particular, in this embodiment, the auxiliary alignment plate 49 having a long plate shape in which the projecting tip portion from the second printed circuit board 22 in the inter-substrate connection terminals 44c and 44d having a large length is formed from a synthetic resin. Alignment accuracy is ensured by being inserted through.

  Further, in the second printed circuit board 22, the electrical component connection portion is provided on the upper end portion 51 of the surface 50 that is opposite to the surface 43 on which the inter-substrate connection terminals 44 are provided and serves as a placement surface of the electrical component connection portion. The connector connection part 52 is provided. The connector connecting portion 52 has a structure in which a plurality of board terminals 56 are inserted into a connector housing 54 made of synthetic resin. The connector housing 54 has a rectangular box shape that opens to one side (right side in FIG. 2), and has a dimension that is approximately half the plane dimension of the second printed circuit board 22. The board terminal 56 is formed of a metal wire or a metal plate, one end of which is inserted into the through hole of the second printed board 22 and soldered, and the other end penetrates the connector housing 54. It projects into the connector housing 54 through the provided terminal insertion hole. The board terminal 56 has a linear shape or a crank shape, and stands upright with respect to the second printed board 22.

  An engagement plate 58 is attached to the connector housing 54. The engagement plate 58 has a long plate shape formed of a synthetic resin, and a fitting protrusion 60 as an uneven fitting portion protruding upward is formed at a central portion in the longitudinal direction. The engaging plate 58 is fixed to the connector housing 54 with bolts 62 and 62 at both ends in the longitudinal direction.

  The connector connecting portion 52 is formed by inserting the connector housing 54 through the board terminal 56 and fixing the connector housing 54 to the second printed board 22 with a plurality of bolts 64. Thereby, the connector housing 54 is opened in the direction perpendicular to the second printed circuit board 22. The second printed circuit board 22 is provided with a fitting protrusion 60 that protrudes upward by an engagement plate 58 attached to the connector housing 54.

  In such a second printed circuit board 22, both side edges 66 a and 66 b of the lower end portion 45 are inserted into the insertion holes 32 and 32 of the substrate support members 26 a and 26 b fixed to the first printed circuit board 20. Each is inserted from above to below. As a result, the second printed circuit board 22 is sandwiched from both sides in the width direction (left and right direction in FIG. 4) by the inner surfaces 34, 34 of the insertion holes 32, 32 of the substrate support members 26a, 26b. 20, and the end portions of the inter-board connection terminals 44 a to 44 d protruding from the second printed circuit board 22 are aligned with the through holes formed in the first printed circuit board 20. Inserted. Then, the surface 43 of the second printed circuit board 22 is overlapped with the support guide surface 38 of the substrate support members 26a and 26b, and the second bolt fixing portions of the substrate support members 26a and 26b with bolts 68 and 68 from the surface 50 side. By being fixed to 40, the second printed circuit board 22 is supported perpendicularly to the first printed circuit board 20 by the substrate support members 26a and 26b. Furthermore, the inter-board connection terminals 44a to 44d inserted through the through holes of the first printed board 20 are soldered. As a result, the first printed circuit board 20 and the second printed circuit board 22 are electrically connected to each other via the inter-board connection terminals 44a to 44d to form the printed circuit board assembly 18.

  Such a printed circuit board assembly 18 is accommodated in a case 16 formed of an upper case 12 and a lower case 14 made of synthetic resin. As a result, the second printed circuit board 22 is disposed in parallel with the side surface 70 of the case 16. The upper case 12 is formed with an opening 72 that opens to the side of the case 16 (rightward in FIG. 2), and the connector connection portion 52 of the second printed circuit board 22 is disposed in the opening 72. The A fitting recess 74 as a concave and convex fitting portion that opens downward is formed on the inner surface on the upper side of the opening 72, and the upper case 12 is covered from above the printed circuit board assembly 18, so that the second The fitting protrusion 60 provided on the printed circuit board 22 is inserted into the fitting recess 74 and is concavo-convexly fitted in the vertical direction. The fitting protrusion 60 is preferably press-fitted into the fitting recess 74. The second printed circuit board 22 is disposed in parallel with the side surface 70 of the case 16, so that the connector housing 54 protrudes to the side of the case 16 through the opening 72, and to the side of the case 16. It is open. Thereby, the connector 76 as an electrical component can be connected to the connector connecting portion 52 from the side of the case 16, and the side component connecting portion is configured by the connector connecting portion 52.

  In the electrical junction box 10 having the structure according to the present embodiment, the second printed circuit board 22 provided with the connector connection portion 52 is disposed perpendicularly to the first printed circuit board 20, so that the second The connector connecting portion 52 of the printed circuit board 22 forms a side component connecting portion that allows the connector 76 to be connected from the side of the case 16. Thereby, the board | substrate terminal 56 which comprises the connector connection part 52 can be made into the simple shape which protrudes perpendicularly | vertically from the 2nd printed circuit board 22, without bending in L shape. As a result, it is easy to dispose a large number of board terminals 56 at a high density, and the connector connection portion 52 is most distant from the first printed board 20 in the second printed board 22 as in the present embodiment, for example. Even in the case of being arranged at the upper end 51 that is separated from the first printed circuit board 20, the L-shaped terminal protrudes from the first printed circuit board 20 and extends to the connector connecting part 52. It is possible to improve the layout flexibility of the connector connecting portion 52.

  Further, the protruding direction of the board terminal 56 from the second printed circuit board 22 (left and right direction in FIG. 2) is made equal to the insertion / extraction direction of the connector 76 to the connector connecting portion 52 (left and right direction in FIG. 2). Therefore, an effective drag against the insertion / extraction force of the connector 76 can be obtained, and the connection reliability between the second printed circuit board 22 and the first printed circuit board 20 can be advantageously ensured. In addition, since both the first printed circuit board 20 and the second printed circuit board 22 are bolted to the substrate supporting members 26a and 26b, the second printed circuit board is against the insertion / extraction force of the connector 76. The substrate 22 can be firmly supported. Further, since the inter-board connection terminals 44a to 44d connected to the second printed circuit board 22 are supported by a pedestal 46 fixed to the second printed circuit board 22 by bolts, the inter-board connection terminals are inserted when the connector 76 is inserted or removed. The stress exerted on 44a-d can be more effectively dispersed by the pedestal 46. Thereby, the connection reliability between the 1st printed circuit board 20 and the 2nd printed circuit board 22 can also be ensured highly.

  Further, in the present embodiment, the fitting protrusion 60 provided on the second printed circuit board 22 and the fitting recess 74 provided on the upper case 12 are unevenly fitted in a direction perpendicular to the insertion / removal direction of the connector 76. Therefore, when the connector 76 is inserted / removed, the second printed circuit board 22 can be supported by the upper case 12 via the connector housing 54, and the insertion / extraction force to the connection portion with the first printed circuit board 20 can be obtained. Can be more effectively suppressed. In particular, an effective supporting force can be obtained by supporting the concave and convex fitting portion composed of the fitting protrusion 60 and the fitting concave portion 74 and both ends of the second printed board 22 in the vertical direction by the board support members 26a and 26b. Can be obtained.

  The board support members 26a and 26b are formed with insertion holes 32 and 32 into which the second printed board 22 is inserted, and the inner surfaces 34 and 34 of the insertion holes 32 and 32 are formed on the second printed board. Since the second printed circuit board 22 is inserted into the insertion holes 32 and 32, the second printed circuit board 22 is positioned with respect to the first printed circuit board 20. Can be combined. As a result, a large number of inter-board connection terminals 44a to 44d soldered to the second printed circuit board 22 can be easily aligned with the through holes of the first printed circuit board 20, and inserted into the through holes. Work can be facilitated. In particular, by providing a support guide surface 38 continuous from the inner surface 34 of the insertion hole 32, the second printed circuit board 22 is brought into contact with the support guide surface 38 so that the insertion into the insertion hole 32 can be easily performed. I can do it. Further, when the connector 76 is inserted / removed, a larger support force can be obtained by supporting the second printed circuit board 22 by the support guide surface 38. Then, the second bolt fixing portion 40 for fixing the second printed circuit board 22 to the substrate supporting members 26a and 26b is provided on the support guide surface 38, whereby the second bolt fixing portion 40 is connected to the substrate supporting member 26a. , 26b can be formed efficiently.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, the side component connecting portion can employ various electric component connecting portions, and not only the connector connecting portion as in the above embodiment, but also, for example, a fuse connecting portion to which a fuse as an electric component is connected, A relay connection portion to which a relay as a component is connected may be used. Furthermore, it is possible to provide a plurality of side part connection portions. In such a case, a plurality of the same type of connection portions may be provided, and different types of connection portions such as a connector connection portion and a fuse connection portion may be provided. May be provided. The number of substrate support members is not limited. For example, the second printed circuit board may be supported by one substrate support member.

  Further, although the pedestal is not necessarily required, the pedestal may be provided on the first printed circuit board side. For example, the first printed circuit board side end of the inter-board connection terminal is inserted into the first printed circuit board. The pedestal may be superimposed on the first printed board by being inserted into the through hole of the printed board, and bolted to the first printed board.

  Further, in the above-described embodiment, the concave / convex fitting portion constituted by the fitting protrusion 60 and the fitting recess 74 is not necessarily required. For example, the fitting protrusion 60 may be formed integrally with the connector housing 54 or the fitting protrusion 60 may be formed. The engaging plate 58 in which the portion 60 is formed may be directly fixed to the second printed circuit board 22, or the second printed circuit board 22 itself is provided with a protruding portion, and the protruding portion is fitted into the protruding protrusion. And so on.

10: Electrical junction box, 16: Case, 20: First printed circuit board, 22: Second printed circuit board, 26a, b: Board support member, 30: First bolt fixing part, 32: Insertion hole, 34 : Inner surface, 38: support guide surface, 40: second bolt fixing portion, 44a to d: inter-board connection terminal, 46: pedestal, 50: surface (surface where electric component connection portion is disposed), 52: connector connection portion (Electrical component connecting portion, side component connecting portion), 56: board terminal, 60: fitting protrusion (uneven fitting portion), 66a, b: side edge portion, 68: bolt (second printed board), 70: Side surface, 74: Fitting recess (uneven fitting portion), 76: Connector (electrical part)

Claims (4)

In the electrical junction box provided with the side part connection part where the electrical part is connected from the side of the case,
A second printed circuit board is arranged perpendicular to the first printed circuit board, and the first printed circuit board and the second printed circuit board are connected to each other by inter-board connection terminals and accommodated in the case. As well as
The second printed circuit board is provided with an electrical component connecting portion configured by a substrate terminal erected perpendicular to the second printed circuit board, and the second printed circuit board is connected to the case. While the side component connecting portion is configured by the electric component connecting portion by being arranged in parallel with the side surface,
The first printed circuit board is provided with a substrate support member having an insertion hole into which the second printed circuit board is inserted and supported,
The board support member is provided with a first bolt fixing part for bolting the first printed board and a second bolt fixing part for bolting the second printed board ,
The board support member protrudes in a direction opposite to the insertion direction of the second printed circuit board into the insertion hole and continues from the inner surface of the insertion hole, and the electrical component in the second printed circuit board An electrical connection box characterized in that a support guide surface is formed so as to be superimposed on a surface opposite to the connection surface of the connection portion, and the second bolt fixing portion is provided on the support guide surface . . The other end of the inter-board connection terminal, one end of which is soldered to the second printed board, is inserted through the through hole of the first printed board and soldered,
The first printed board is provided with a pair of board support members, and the inner surfaces of the insertion holes of the pair of board support members are inserted into the side edges of the second printed board. The electrical connection box according to claim 1, wherein the electrical connection box has a U-shape sandwiching the second printed board from both sides. The board-to-board connection terminal is supported by a base made of synthetic resin, and the base is provided with a bolt fixing portion that is bolted to the first printed board or the second printed board. The electrical junction box according to 1 or 2 . Said second printed circuit board and the case, the electrical component of claim 1 to 3 in which the recess-projection fitting portion fitted to each other in a direction orthogonal to the connecting direction is formed into the electrical component connecting portion The electrical junction box according to any one of the above.

Images