JP2011114954A - Electrical junction box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrical junction box having a new structure in which each substrate terminal mounted on a printed wiring board is positioned with high accuracy with respect to each electrical-component storage wall. <P>SOLUTION: A synthetic-resin-made intermediate plate 20 is positioned and placed on the protruding side of substrate terminals 28a, 28b in a printed wiring board 18. The substrate terminals 28a, 28b are extended to the outside of a case 16 via through-holes 34a, 34b, and 34c formed in the intermediate plate 20, and electrical-component storage walls 36a, 36b, and 36c are integrally molded with the intermediate plate 20 so as to be located around the substrate terminals 28a, 28b and to protrude externally from windows 48a, 48b, and 48c of the case 16. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electrical junction box mounted on an automobile or the like, and more particularly, to an electrical junction box provided with a printed wiring board.

  2. Description of the Related Art Conventionally, an electrical connection box such as a junction box used for automobile wiring or the like incorporates a circuit configured by mounting a plurality of board terminals on a printed wiring board. For example, as shown in FIG. 1 of Japanese Patent Laid-Open No. 2008-35669 (Patent Document 1), one end of the board terminal is soldered and connected to the conductive path of the printed wiring board, while the other The end side protrudes into a cylindrical electrical component housing wall provided in the upper case, and can be connected to an electrical component such as a mating connector provided on an external wire terminal fitted to the electrical component housing wall. ing.

  By the way, when the female terminal of the mating connector is connected as an electrical component to the board terminal on the printed wiring board, for example, the mating connector is guided by the electrical component housing wall portion of the upper case. The female terminal is aligned relative to the terminal. Therefore, in order to achieve a smooth fit between the board terminal and the female terminal of the mating connector, it is important that the board terminal is accurately positioned with respect to the electrical component housing wall of the upper case. Become.

  However, the upper case is attached with a mounting bracket to the vehicle body, and external force from other members is applied, so that it is easily displaced with respect to the printed circuit board on which the board terminal is mounted. There was a problem that it was difficult to avoid misalignment of the part. In particular, due to the recent demand for higher density and compactness of electrical junction boxes, it has been studied to realize high-density circuit wiring by arranging board terminals at a narrower pitch. In this case, the positional deviation between the board terminal and the electric component housing wall becomes a more serious problem. That is, when a slight displacement between the board terminal and the electrical component housing wall makes it difficult to connect the female terminal of the mating connector and the board terminal that are aligned by fitting to the electrical component housing wall. was there. In addition, since the width of the board terminal itself is reduced in order to enable a narrow pitch arrangement, the lateral displacement occurs when connecting with the female terminal of the mating connector due to the positional displacement with respect to the electrical component housing wall. There was also a problem that the substrate terminal was easily bent due to the force.

JP 2008-35669 A

  The present invention has been made in the background of the above-mentioned circumstances, and a solution to that problem is that a terminal for a board mounted on a printed wiring board is positioned with high accuracy with respect to an electrical component housing wall. Is to provide an electrical junction box with a simple structure.

  According to a first aspect of the present invention, a printed wiring board is housed in a case, and a board terminal that is soldered to the printed wiring board and protrudes on the board surface is formed in the window. In the electrical junction box that is exposed to the outside through the section and can be connected to an external energization path, a synthetic resin intermediate plate is positioned and placed on the protruding side of the board terminal on the printed wiring board. And the board terminal extends through the insertion hole formed in the intermediate plate, and is positioned around the board terminal in the printed wiring board in the protruding direction of the board terminal from the intermediate plate. An electrical component housing wall portion that rises and projects outward from the window portion of the case is integrally formed with the intermediate plate.

  According to the electrical junction box having the structure according to this aspect, the electrical component housing wall is integrally formed on the intermediate plate positioned and placed on the printed wiring board. Thereby, it is possible to avoid the influence of the dimensional error of the case and the like, and it is possible to accurately align the electric component housing wall with respect to the board terminal provided on the printed wiring board. Even when the case is deformed by an external force or the like when attached to the vehicle body panel, the electrical component housing wall can be prevented from being relatively displaced with respect to the board terminal. The positioning between the portion and the board terminal can be accurately maintained. As a result, the counterpart electrical component housed in the electrical component housing wall can be more stably connected to the board terminal.

  In addition, the intermediate plate only needs to be placed on the printed wiring board after the terminals for the board are soldered, and it is not necessary to expose the intermediate plate to the high temperature environment of soldering. It is also unnecessary to use an expensive material such as a resin, and the manufacturing cost can be reduced.

  According to a second aspect of the present invention, in the one described in the first aspect, the electrical component housing wall portion is configured to include a connector housing wall portion, and is in a region surrounded by the connector housing wall portion. The insertion hole is formed in the intermediate plate, and the board terminal that is fixedly penetrated to the pedestal is exposed through the insertion hole.

  According to this aspect, by housing the mating connector as an electrical component in the connector housing wall, the mating connector is accurately positioned with respect to the board terminal provided on the printed wiring board, and stable connector connection is achieved. Can be done. In addition, since the connector housing wall is integrally formed with the intermediate plate, the base for penetrating and fixing the board terminals can be a substantially block-shaped one that has been widely used conventionally. Accordingly, it is possible to avoid the possibility that the hood portion hinders visual confirmation of the soldered portion as in the case where the hood portion constituting the connector housing wall portion is directly formed on the pedestal.

  According to a third aspect of the present invention, in the connector according to the second aspect, in the connector receiving wall portion of the intermediate plate, the connector receiving wall portion protrudes inwardly, and is closer to the opening direction side of the connector receiving wall portion than the pedestal. A mating connector that covers the external connection terminal connected to the board terminal is fitted into the connector housing wall, and the tip surface of the mating connector is the abutting portion. It comes to contact | abut with respect to.

  According to this aspect, the mating connector is brought into contact with the contact portion, whereby the insertion end position of the mating connector with respect to the connector housing wall can be defined. And since the contact part is located in the case outer side rather than the base of the terminal for board | substrates, the contact to the base of an other party connector can be blocked | prevented. Thereby, the pressing force exerted on the pedestal when the mating connector is fitted can be reduced, and the possibility of deformation or damage to the pedestal or the printed wiring board can be reduced.

  According to a fourth aspect of the present invention, in the one described in any one of the first to third aspects, the printed wiring board and the intermediate plate are covered by a pair of case division bodies that cover the both sides in the overlapping direction. The case is configured and protrudes from one case division body toward the other case division body and is inserted into positioning holes respectively formed in the printed wiring board and the intermediate plate, so that the prints are printed. A plurality of positioning protrusions for positioning the wiring board and the intermediate plate with respect to the case are provided.

  According to this aspect, by providing the positioning projections on the case divided body, the intermediate plate can be positioned and placed on the printed wiring board with a small number of parts. Furthermore, since the printed wiring board and the intermediate plate can be easily and accurately positioned by a simple operation of inserting the positioning protrusions into the positioning holes formed in the printed wiring board and the intermediate plate, it is possible to obtain excellent assembly efficiency. I can do it.

  According to a fifth aspect of the present invention, in the above-described fourth aspect, a contact support portion that protrudes on the outer peripheral surface is integrally formed at a base end portion of the positioning protrusion provided on the one case split body. And a fitting tube portion that is externally inserted into a protruding tip portion of the positioning projection in the portion corresponding to the positioning projection of the one case division body in the other case division body, and is formed integrally. A laminated structure including the printed wiring board and the intermediate plate is sandwiched and held between the facing surfaces of the contact support portion and the fitting cylinder portion of the positioning protrusions in the overlapping direction of the pair of case divided bodies. It is what.

  According to this aspect, in the formation portion of the positioning projection where the printed wiring board and the intermediate plate are positioned, the printed wiring board is formed between the contact support portion formed on the pair of case divided bodies and the opposing surface of the fitting cylinder portion. And the intermediate plate can be held in the overlapping direction and held in the case. As a result, for example, lifting from the printed wiring board due to warpage of the intermediate plate or the like can be suppressed, and the positioning accuracy of the electrical component housing wall portion and the board terminal can be further improved.

  According to the present invention, the electrical component housing wall is integrally formed on the intermediate plate positioned and mounted on the printed wiring board, and the electrical component housing wall is protruded outward from the window of the case. Thereby, the positional accuracy of the board terminal soldered to the printed wiring board and the electric component housing wall can be improved. As a result, the electrical component accommodated in the electrical component accommodating portion and the board terminal can be more stably connected.

The disassembled perspective view of the electrical-connection box as one Embodiment of this invention. The top view of the intermediate | middle plate which comprises the electrical-connection box shown in FIG. FIG. 3 is a side view of the intermediate plate shown in FIG. The perspective view which shows the assembly | attachment state of the electrical-connection box shown in FIG. Cross-sectional explanatory drawing which shows the VV cross section in FIG. 4 roughly. Cross-sectional explanatory drawing which shows schematically the VI-VI cross section in FIG. Explanatory drawing for demonstrating the different aspect of the intermediate | middle plate of this invention.

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

  First, FIG. 1 shows an exploded perspective view of an electrical junction box 10 as an embodiment of the present invention. The electrical junction box 10 is accommodated in a state where a printed wiring board 18, an intermediate plate 20, a bus bar 22 and the like are overlapped in a case 16 formed by combining an upper case 12 and a lower case 14 as a divided case. It has become so.

  A plurality of pedestal connectors 24 a, 24 b, and 24 c are disposed on the printed wiring board 18. As these base connectors 24a to 24c, conventionally known ones can be appropriately employed. Each of the base connectors 24a to 24c has a structure in which a linear terminal 28a or a tab-like terminal 28b as a board terminal is fixed to the base 26 so as to penetrate therethrough.

  The pedestal 26 has a substantially rectangular block shape made of a non-conductive synthetic resin material, and a plurality of leg portions 30 protruding toward the printed wiring board 18 are integrally formed. The linear terminal 28a is formed by cutting a conductive metal wire at predetermined lengths, and is a pin-shaped terminal having a cross-sectional shape such as a square or a circle. On the other hand, the tab-shaped terminal 28b is formed by pressing a conductive metal plate or the like, and has a flat cross-sectional shape such as a rectangle. A plurality of such linear terminals 28 a and tab-like terminals 28 b are inserted into through holes formed in the pedestal 26, or are insert-molded into the pedestal 26, so that both ends protrude from the pedestal 26. It is fixed to the pedestal 26 in a penetrating state. In the present embodiment, only the linear terminals 28a are fixed to the bases 26 and 26 of the base connectors 24a and 24b, while the linear terminals 28a and the tab-like terminals 28b are fixed to the base 26 of the base connector 24c. Has been.

  And one end part of the linear terminal 28a and the tab-like terminal 28b which protruded from the base 26 is penetrated to the through-hole penetrated by the printed wiring board 18, and is soldered, thereby the base connector 24a- 24c is fixed on one surface 31a of the printed wiring board 18, and the linear terminal 28a and the tab-like terminal 28b are projected on the surface 31a. In addition, the pedestal 26 is fixed to the printed wiring board 18 so that the leg 30 protrudes toward the printed wiring board 18 so that the leg 30 is in contact with the surface 31a or slightly spaced. Be positioned.

  On the printed wiring board 18, board terminals of various shapes, various electrical components, and the like are appropriately disposed. For example, the printed wiring board 18 according to the present embodiment has a tuning fork shape and a plurality of fuse connection terminals 32 that are connected to fuses (not shown). Although the fuse connection terminal 32 may be provided directly on the printed wiring board 18, in the present embodiment, the printed wiring board 18 is in a state where it is penetrated and fixed to the base 26 similar to the base connectors 24 a to 24 c. It protrudes on the surface 31a.

  The intermediate plate 20 is positioned and placed on the surface 31 a of the printed wiring board 18. 2 and 3 show the intermediate plate 20. The intermediate plate 20 is an integrally molded product formed from a non-conductive synthetic resin or the like. In the intermediate plate 20, insertion holes 34 a, 34 b, 34 c are respectively penetrated at positions where they overlap the pedestal connectors 24 a, 24 b, 24 c when mounted on the printed wiring board 18. The insertion holes 34 a to 34 c are each formed with a substantially rectangular shape through which the base 26 can be inserted.

  The intermediate plate 20 is integrally formed with connector housing wall portions 36a, 36b, and 36c as electric component housing wall portions that surround the insertion holes 34a, 34b, and 34c and project toward the upper case 12 side. Yes. The connector housing walls 36a, 36b, 36c respectively rise from the intermediate plate 20 in the protruding direction of the linear terminal 28a and the tab-shaped terminal 28b, and continuously extend in the circumferential direction through the insertion holes 34a, 34b, 34c. It is set as the cylindrical surrounding wall which covers over. On the inner peripheral surfaces of the connector housing walls 36a, 36b, 36c, if necessary, a guide rib 38 that protrudes inward and extends in the fitting direction of a mating connector 70 (see FIG. 5) described later, An engaging claw 40 to be engaged is formed. That is, the connector housing walls 36a, 36b, 36c are conventionally formed in the upper case and have substantially the same shape as the connector housing wall that houses the mating connector.

  Further, in the connector receiving wall portions 36a, 36b, and 36c, rib-shaped contact portions 42 that protrude inward and extend in the plane direction of the intermediate plate 20 are integrally formed on a pair of inner peripheral surfaces facing each other. Yes. The connector housing wall portions 36a, 36b, and 36c in the present embodiment are formed in a substantially longitudinal rectangular tube shape corresponding to the opening shape of the insertion holes 34a, 34b, and 34c, and the contact portion 42 is formed of the connector housing wall portion 36a. , 36b, 36c are formed on the inner peripheral surfaces on both ends in the longitudinal direction.

  Further, as shown in FIG. 3, the intermediate plate 20 has a substantially longitudinal rectangular cylindrical shape similar to the connector receiving wall portions 36a, 36b, 36c so as to be continuous with the connector receiving wall portions 36a, 36b, 36c. A board-side protruding peripheral wall 44 that protrudes toward the printed wiring board 18 is integrally formed. The projecting dimension of the board-side projecting peripheral wall 44 is appropriately formed integrally with the corner of the intermediate plate 20 and is equal to the projecting dimension of the leg 46 projecting to the printed wiring board 18 side.

  In the intermediate plate 20, a notch 47 is formed at a position overlapping the pedestal 26 that is disposed on the printed wiring board 18 and fixes and supports the plurality of fuse connection terminals 32 in a state of being mounted on the printed wiring board 18. ing.

  On the other hand, the upper case 12 is an integrally molded product made of a non-conductive synthetic resin or the like, and has a substantially rectangular box shape opening to one side. In the upper case 12, windows 48 a, 48 b, and 48 c are formed so as to penetrate at positions where the intermediate plate 20 overlaps with the connector housing walls 36 a, 36 b, and 36 c. These window portions 48a, 48b and 48c are formed with slightly larger dimensions corresponding to the shapes of the connector receiving wall portions 36a, 36b and 36c so that the connector receiving wall portions 36a, 36b and 36c can be inserted therethrough. Yes.

  The upper case 12 is appropriately formed with a connector housing wall 50 for housing a mating connector as an electrical component and a fuse housing wall 52 for housing a fuse as an electrical component as needed. A terminal insertion hole 54 is provided in a region surrounded by the connector housing wall 50 and the fuse housing wall 52 (see FIG. 5).

  The lower case 14 is an integrally molded product made of a non-conductive synthetic resin or the like, and has a substantially rectangular box shape opening to one side. A plurality of positioning protrusions 56 projecting toward the upper case 12 are integrally formed on the lower case 14. The positioning protrusion 56 has a circular cross-sectional shape and protrudes toward the upper case 12, and is easily inserted into positioning holes 60a and 60b, which will be described later, and fitted into the fitting cylinder portion 62. In addition, a contact support portion 58 that protrudes on the outer peripheral surface of the positioning projection 56 is integrally formed at the base end portion of the positioning projection 56. The diameter of the contact support portion 58 is larger than the diameter of positioning holes 60a and 60b described later.

  The number of positioning protrusions 56 is not particularly limited, but it is preferable that three or more positioning protrusions 56 are provided in order to improve the positioning accuracy of the printed wiring board 18 and the intermediate plate 20 described later. Further, the positioning protrusion 56 is preferably formed at a position corresponding to the outer peripheral portion of the printed wiring board 18 in order to improve positioning accuracy and secure an effective space of the printed wiring board 18. In the present embodiment, three positioning protrusions 56 are formed on the outer peripheral portion of the lower case 14, and the two positioning protrusions 56 and one positioning protrusion 56 are positioned on the opposite sides of the lower case 14. The protrusions 56 are respectively located at the vertices of the triangle.

  In the printed wiring board 18 and the intermediate plate 20, positioning holes 60a and 60b are provided at positions corresponding to the positioning protrusions 56, respectively. The positioning holes 60a and 60b have a circular shape through which the positioning protrusion 56 can be inserted. The upper case 12 is integrally formed with a fitting cylinder portion 62 (see FIG. 6) at a position corresponding to the positioning protrusion 56 on the inner peripheral surface facing the lower case 14. The fitting cylinder portion 62 has a cylindrical shape protruding toward the lower case 14 and is fitted to the positioning protrusion 56 in an extrapolated state.

  When assembling such an electrical junction box 10, first, the printed wiring board 18 to which the base connectors 24 a, 24 b, 24 c are attached and the linear terminals 28 a and the tab-shaped terminals 28 b project is attached to the lower case 14. Superimposed. The printed wiring board 18 is overlaid in a positioning state with respect to the lower case 14 by inserting the positioning protrusions 56 protruding from the lower case 14 through the positioning holes 60a. In the present embodiment, the printed wiring board 18 is overlaid while being placed on the peripheral edge of the lower case 14. Then, the intermediate plate 20 is overlaid on the surface 31 a of the printed wiring board 18 overlaid on the lower case 14. The intermediate plate 20 is also superposed in a positioning state with respect to the lower case 14 by inserting the positioning protrusion 56 of the lower case 14 through the positioning hole 60b. As a result, the intermediate plate 20 is placed on the surface 31a of the printed wiring board 18 in a positioned state.

  Then, after the bus bar 22 is placed on the surface of the intermediate plate 20 on the upper case 12 side, the upper case 12 is overlapped and assembled to the lower case 14. The upper case 12 is assembled in an externally fitted state to the lower case 14 by fitting the fitting cylinder portion 62 to the protruding tip of the positioning projection 56 of the lower case 14 in an extrapolated state (see FIG. 6). As a result, the printed wiring board 18 and the intermediate plate 20 are covered with the upper case 12 and the lower case 14 from both sides in the overlapping direction, and are accommodated in the case 16 constituted by the upper case 12 and the lower case 14. In this way, the electrical junction box 10 shown in FIG. 4 is formed.

  As shown in FIG. 5, in the assembled state of the electrical junction box 10, the base connectors 24a, 24b, 24c are inserted into the insertion holes 34a, 34b, 34c of the intermediate plate 20, respectively. Thereby, the circumference | surroundings of the base connector 24a, 24b, 24c are each enclosed by the connector accommodating wall part 36a, 36b, 36c over the perimeter. And the connector accommodating wall parts 36a, 36b, and 36c are projected outside the case 16 through the window parts 48a, 48b, and 48c penetrating the upper case 12, respectively. As a result, the linear terminals 28a and the tab-like terminals 28b that are fixedly penetrated to the base connectors 24a, 24b, and 24c are inserted through the insertion holes 34a, 34b, and 34c that are provided through the intermediate case 20 and the upper case 12. It extends through the windows 48 a, 48 b, 48 c and is exposed to the area surrounded by the connector housing walls 36 a, 36 b, 36 c, thereby being exposed to the external space of the case 16. The intermediate plate 20 is placed on the printed wiring board 18 in a non-contact state with respect to the base connectors 24a, 24b, and 24c, and the connector receiving wall portions 36a, 36b, and 36c including the contact portions 42 are provided. The board-side protruding peripheral wall 44 is disposed in a non-contact state spaced apart from the base connectors 24a, 24b, and 24c.

  Further, when the intermediate plate 20 is placed on the printed wiring board 18, the contact portion 42 is more open than the pedestal 26 of the pedestal connectors 24a, 24b, 24c in the opening direction of the connector receiving wall portions 36a, 36b, 36c (FIG. 5). (Middle, upper). Further, the intermediate plate 20 is disposed in a state of being separated from the surface 31 a of the printed wiring board 18 by leg portions 46 that are formed to protrude toward the printed wiring board 18 and board-side protruding peripheral walls 44.

  Further, when the upper case 12 is assembled, the fuse connection terminal 32 projecting from the printed wiring board 18 and the fuse connection portion 64 formed on the bus bar 22 are inserted into the terminal insertion hole 54 penetrating the upper case 12. Then, it is exposed to the external space of the case 16 within the region surrounded by the fuse housing wall 52. At the same time, the tab 66 formed in the bus bar 22 is inserted into the terminal insertion hole 54 and exposed to the external space of the case 16 in the region surrounded by the connector housing wall 50 (see FIG. 4).

  Further, as shown in FIG. 6, in the assembled state of the electrical junction box 10, the contact support portion 58 is superimposed on the surface 31 b on the lower case 14 side of the printed wiring board 18, and the upper case 12 side of the intermediate plate 20. The fitting cylinder part 62 is overlaid on the surface. As a result, the laminated structure 68 including the printed wiring board 18 and the intermediate plate 20 has the overlapping direction of the upper case 12 and the lower case 14 between the facing surfaces of the contact support portion 58 and the fitting cylinder portion 62. The intermediate plate 20 is held in an overlapped state with the printed wiring board 18.

  In the electrical junction box 10 having such a structure, the mating connector 70 is fitted into the connector housing walls 36a, 36b, 36c, as shown in FIG. The insertion end position of the counterpart connector 70 is defined by the front end surface 71 of the counterpart connector 70 coming into contact with the contact portion 42. As a result, the external connection terminals 72 that are covered by the mating connector 70 and form the end of the external current path are provided on the base connectors 24a, 24b, and 24c disposed in the connector housing walls 36a, 36b, and 36c. Are connected to the linear terminals 28a and tab-shaped terminals 28b. Thereby, the external connection terminal 72 is electrically connected to the printed wiring (not shown) of the printed wiring board 18 through the linear terminal 28a and the tab-shaped terminal 28b.

  Further, a fuse 74 is fitted into a fuse accommodating wall 52 provided in the upper case 12 and connected to a fuse connection terminal 32 protruding from the printed wiring board 18 and a fuse connection portion 64 protruding from the bus bar 22. The As a result, the fuse 74 is electrically connected to the printed wiring board 18 and the bus bar 22. Although not shown, the mating connector is fitted into the connector housing wall 50 provided in the upper case 12 and connected to the tab 66 projecting from the bus bar 22, so that the mating connector is connected to the bus bar 22. And is electrically connected.

  According to the electrical junction box 10 having such a structure, the connector receiving wall portions 36a, 36b, and 36c are formed on the intermediate plate 20 that is positioned and placed on the printed wiring board 18, thereby being fixed to the printed wiring board 18. The connector receiving wall portions 36a, 36b, and 36c can be accurately positioned with respect to the linear terminals 28a and tab-shaped terminals 28b. As a result, the mating connector 70 to be fitted into the connector housing walls 36a, 36b, 36c can be aligned with respect to the linear terminal 28a and the tab-like terminal 28b with higher accuracy, and a more stable connection can be achieved. Can be done.

  In particular, since the connector housing walls 36a, 36b, and 36c are formed on the intermediate plate 20, the upper case 12 and the lower case 14 due to the external force of the assembly when the electrical connection box 10 is assembled to the vehicle body panel or the like, for example. Without being affected by deformation or dimensional errors between the upper case 12 and the lower case 14, the relative positions of the connector housing walls 36a, 36b, 36c, the linear terminals 28a and the tab-like terminals 28b can be maintained with high accuracy. I can do it. Further, since the warp of the intermediate plate 20 can be corrected by pressing the fitting cylindrical portion 62 of the upper case 12 against the intermediate plate 20, the connector receiving wall portions 36a, 36b, 36c are connected to the linear terminals 28a and the tab-shaped terminals 28b. Can be positioned with higher accuracy.

  Further, the printed wiring board 18 and the intermediate plate 20 are positioned with respect to each other by inserting the positioning protrusions 56 protruding from the lower case 14 into the positioning holes 60a and 60b. Accordingly, the printed wiring board 18 and the intermediate plate 20 can be positioned with high accuracy with a simple assembling operation and a small number of parts.

  Further, the contact portion 42 that defines the insertion end position of the mating connector 70 is located on the outer side of the case 16 with respect to the base 26. Thus, when the mating connector 70 is connected to the base connectors 24a, 24b, 24c, it is avoided that the pressing force of the mating connector 70 is exerted on the base 26, and the base 26 and the printed wiring board 18 on which the base connector 26 is placed. The risk of damage can be reduced. Further, since the abutting portion 42 is formed integrally with the intermediate plate 20, the pressing force of the mating connector 70 can be dispersed throughout the intermediate plate 20. At the same time, when the board-side protruding peripheral wall 44 abuts against the printed wiring board 18, it is possible to obtain a supporting force against the pressing of the mating connector 70 against the abutting portion 42, and to stably position the mating connector 70. Can be specified.

  Furthermore, the bus bar 22 is placed on the intermediate plate 20, whereby the bus bar 22 and the printed wiring board 18 are insulated from each other by the intermediate plate 20. That is, in the present embodiment, the intermediate plate 20 is configured by using an insulating plate that insulates the bus bar 22 and the printed wiring board 18, and the linear terminals 28a and the tab-shaped terminals 28b are not increased without increasing the number of parts. And the connector housing walls 36a, 36b, 36c can be aligned with high accuracy.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, as shown in FIG. 7, a pedestal plate 82 in which a plurality of pedestals 26 are connected to each other by connecting ribs 80 may be used as shown on the surface of the intermediate plate 20 on the printed wiring board 18 side. In the pedestal plate 82, the pedestals 26, 26, and 26 that constitute the pedestal connectors 24a, 24b, and 24c and the pedestal 26 that penetrates and fixes the fuse connection terminals 32 that protrude from the printed wiring board 18 are weak. These are integrally molded products made of non-conductive synthetic resin, which are connected to each other by various connecting ribs 80.

  On the other hand, on the printed wiring board 18 side of the intermediate plate 20, a housing concave groove 84 corresponding to the shape of the connecting rib 80 is formed at a position overlapping the connecting rib 80. The housing concave groove 84 is opened to the printed wiring board 18 side and has a groove shape extending corresponding to the shape of the connecting rib 80. In addition, the formation part of the accommodation ditch | groove 84 in the board | substrate side protrusion surrounding wall 44 is formed when the board | substrate side protrusion surrounding wall 44 is notched. In addition, the housing concave groove 84 is formed with a dimension that allows some clearance between the intermediate plate 20 and the connecting rib 80 in a state where the intermediate plate 20 is superimposed on the printed wiring board 18.

  Then, the intermediate plate 20 is positioned and placed on the printed wiring board 18 to which the pedestal plate 82 is fixed, so that the pedestals 26, 26, 26 constituting the pedestal connectors 24a, 24b, 24c are inserted into the insertion holes 34a, 34b, 34c. The connecting rib 80 that is inserted into the intermediate plate 20 and is overlapped with the intermediate plate 20 is accommodated in the accommodating concave groove 84 with a gap.

  In this way, the mounting of the plurality of bases 26 to the printed wiring board 18 can be further simplified. At the same time, the plurality of bases 26 can be collectively positioned with respect to the printed wiring board 18 and the intermediate plate 20. Then, by providing the accommodation concave groove 84 in the intermediate plate 20, it is possible to superimpose on the base plate 82 provided with the connecting rib 80.

  Moreover, although all the connector accommodating wall parts 36a-36c in the said embodiment were made into the cylinder shape continuous in the circumferential direction, the electrical component accommodating wall part may be discontinuous in the circumferential direction. Furthermore, the electrical component housed in the electrical component housing wall is not limited to the connector as in the above embodiment, and may be a fuse or a relay, for example. Therefore, it is also possible to employ a fuse connection terminal having a tuning fork shape or the like as the terminal for the board accommodated in the electrical component housing wall. Further, the bus bar 22 in the above embodiment is not necessarily required, and the intermediate plate may be one on which the bus bar is not placed.

  Furthermore, the cross-sectional shape of the positioning protrusion is not limited to the circular shape as in the above-described embodiment, and any shape such as a rectangular shape or other polygonal shapes can be appropriately employed. If the cross-sectional shape of the positioning protrusion is a polygonal shape, the relative rotational displacement of the printed wiring board and the intermediate case relative to the case divided body can be more effectively suppressed. The plurality of positioning projections may be formed on only one of the pair of case division bodies, but are formed on both case division bodies and project toward the other case division body, respectively. You may do it.

  Further, as the substrate terminal, a crank-shaped terminal having a portion bent in a crank shape may be employed, and the substrate terminal may be provided directly on the printed wiring board without using a pedestal. Further, the board terminal may be one that is superposed on the surface of the printed wiring board and soldered without being inserted into the through hole.

10: Electrical connection box, 12: Upper case (case divided body), 14: Lower case (case divided body), 16: Case, 18: Printed wiring board, 20: Intermediate plate, 24a, b, c: Base connector, 26 : Pedestal, 28a: linear terminal (substrate terminal), 28b: tab-shaped terminal (substrate terminal), 31a: surface (substrate surface), 34a, b, c: insertion hole, 36a, b, c: connector accommodation Wall part (electric component housing wall part), 42: contact part, 48a, b, c: window part, 54: terminal insertion hole, 56: positioning protrusion, 58: contact support part, 60a, b: positioning hole, 62: fitting cylinder part, 68: laminated structure, 70: mating connector, 71: tip surface, 72: external connection terminal

Claims (5)

A printed circuit board is housed inside the case, and a board terminal that is soldered to the printed circuit board and protrudes on the board surface is exposed to the outside through a window formed in the case. In the electrical junction box that can be connected to the current path,
An intermediate plate made of synthetic resin is positioned and placed on the protruding side of the board terminal in the printed wiring board, and the board terminal extends through an insertion hole formed in the intermediate plate, and the print An electrical component housing wall portion that is positioned around the board terminal on the wiring board and rises from the intermediate plate in the protruding direction of the board terminal and projects outward from the window portion of the case is integrally formed with the intermediate plate. An electrical junction box characterized by that.   The electrical component housing wall is configured to include a connector housing wall, and the insertion hole is formed in the intermediate plate within a region surrounded by the connector housing wall, and through the insertion hole, The electrical connection box according to claim 1, wherein the terminal for the board, which is fixedly penetrated to the base, is exposed.   In the connector receiving wall portion of the intermediate plate, an abutting portion that protrudes inward and is located on the opening direction side of the connector receiving wall portion with respect to the pedestal is integrally formed, and is connected to the board terminal. 3. The electrical connection according to claim 2, wherein a mating connector that covers the external connection terminal is fitted into the connector housing wall portion so that a front end surface of the mating connector comes into contact with the abutting portion. box.   The case is constituted by a pair of case division bodies that cover the printed wiring board and the intermediate plate from both sides in the overlapping direction, and protrudes from one case division body toward the other case division body and 4. A plurality of positioning protrusions are provided for positioning the printed wiring board and the intermediate plate with respect to the case by being inserted into positioning holes respectively formed in the printed wiring board and the intermediate plate. The electrical junction box according to any one of the above.   A contact support portion protruding on the outer peripheral surface is integrally formed at a base end portion of the positioning protrusion provided in the one case divided body, and the one case divided body in the other case divided body is formed. A fitting tube portion that is extrapolated to the protruding tip portion of the positioning protrusion is integrally formed at a portion corresponding to the positioning protrusion, and between the facing surfaces of the contact support portion of the positioning protrusion and the fitting tube portion, The electrical junction box according to claim 4, wherein a laminated structure including the printed wiring board and the intermediate plate is sandwiched and held in an overlapping direction of the pair of case divided bodies.

Images