JP2011200049A - Electrical junction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical junction box having a novel structure which can be made to be compact and improve production efficiency, and can ensure reliability in connection between housed printed circuit boards.SOLUTION: Outer connecting terminals 30 and inner connecting terminals 28 each have an abutting portion 40 which is folded back from an insertion portion 38 inserted into a through-hole 24 and opposes outer circumferential surfaces 26a-26d of printed circuit boards 18a, 18b and outer circumferential surfaces 62a-62d of an insulating block 20, and a connecting portion 48 of the outer connecting terminal 30 protrudes to the side of a printed circuit board laminate 22 to form an outer connecting portion 82. A press-contact portion 44 of the inner connecting terminal 28 is protruded to the side, and a conductive line 86 is pressed to the press-contact portions 44, 44 of the inner connecting terminals 28, 28 formed on both the printed circuit boards 18a, 18b and connected to each other, thereby configuring an inner connecting portion 92.

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 that accommodates a printed board laminate in which a plurality of printed boards are laminated.

  2. Description of the Related Art Conventionally, in an electrical connection box such as a junction box mounted on an automobile, an internal circuit is configured using a printed circuit board laminate in which a plurality of printed circuit boards are overlaid. For example, the one described in JP-A-7-297562 (Patent Document 1). A printed circuit board laminate accommodated in such an electrical connection box generally has an external connection portion for connecting a wiring circuit of each printed circuit board to an external electrical component such as a fuse or a connector, and a wiring circuit of each printed circuit board. It has a structure having a connected internal connection part.

  By the way, as shown also in patent document 1, both the printed circuit boards which comprise a printed circuit board laminated body are the both ends of internal connection terminals, such as a connection terminal between board | substrates, with respect to the through hole formed in each printed circuit board. The parts are electrically connected to each other by being inserted and soldered.

  However, in order to form an external connection portion, it is necessary to solder an external connection terminal for connecting to an electrical component such as a fuse in addition to the internal connection terminal to each printed circuit board. Therefore, when manufacturing printed circuit board laminates, first solder the external connection terminals to each of the two printed circuit boards to be laminated, and then solder both ends of the internal connection terminals to each printed circuit board. Therefore, at least four soldering steps are required, which is troublesome. In addition, the two printed circuit boards are stacked via an insulating plate, but when soldering the internal connection terminals, the relative positions of both printed circuit boards change due to the thermal expansion of the insulating plate, and the soldering is performed. There was a risk of cracking. Furthermore, if the internal connection terminals are fixed to both printed circuit boards by soldering, the two printed circuit boards cannot be opened, and there is a problem in maintainability.

  In addition, as described in Patent Document 1, the electrical junction box that accommodates the printed circuit board laminate has a problem in that the thickness dimension increases because electrical components are mounted on the surface of the printed circuit board. There is a problem that electrical components can be mounted only on one outer surface of each printed circuit board, which limits the layout of electrical components.

  In view of this, the present applicant, in Japanese Patent Application Laid-Open No. 2007-259571 (Patent Document 2), causes the external connection terminals constituting the external connection portion to protrude sideways, and each printed circuit board has a tuning fork-shaped connection portion. We proposed an electrical junction box with a printed circuit board laminate that is connected by a bus bar to form an internal connection. According to such an electrical connection box, the electrical connection box can be made compact by providing the external connection part on which the external electrical component is mounted on the side of the printed circuit board laminate. At the same time, by connecting each printed circuit board with a bus bar, the number of times of soldering can be reduced and the risk of solder cracks can be avoided.

  However, the electrical junction box described in Patent Document 2 is configured to connect the bus bar and the printed circuit board by sandwiching the printed circuit board together with the printed circuit formed on the surface thereof by a tuning fork-shaped connection part formed on the bus bar. ing. Therefore, the contact width area between the bus bar and the printed circuit is small, and there is a possibility that the electrical connection stability is impaired by a slight deviation. Moreover, there is a possibility that the printed circuit board may be deformed by sandwiching the printed circuit board between the tuning fork-shaped connecting portions, and there is still room for examination.

JP-A-7-297562 JP 2007-259571 A

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is that in an electrical junction box containing a printed circuit board laminate, it is possible to reduce the size and improve the manufacturing efficiency. An object of the present invention is to provide an electrical junction box having a novel structure capable of ensuring connection reliability between substrates.

  In the first aspect of the present invention, two printed circuit boards are laminated and arranged, and an external connection part for connecting a wiring circuit on each printed circuit board to an external electrical component, and the two printed circuit boards In an electrical junction box in which a printed circuit board laminate provided with an internal connection portion for interconnecting the wiring circuits is housed in a case, an insulating block is disposed between the two printed circuit boards. On the other hand, on the outer peripheral part of each printed circuit board, there are inserted parts that are inserted into the through holes of the printed circuit board and soldered, and the outer peripheral surface of the printed circuit board that is folded back from the inserted part and the outer periphery of the insulating block An external connection terminal and an internal connection terminal having a fitting portion formed with a contact portion facing the surface are provided, and the contact is bent and extended from the contact portion in the external connection terminal. The external connection portion is configured by protruding a portion from the outer peripheral surface of the insulating block to the side of the printed circuit board laminate, and the internal connection terminal is bent and extended from the contact portion. The pressure contact portion protrudes from the outer peripheral surface of the insulating block to the side of the printed circuit board laminate, and is provided on the pressure contact portion of the internal connection terminal provided on one of the printed circuit boards and the other printed circuit board. In addition, the internal connection portion is configured by pressing a conductive line to the pressure contact portion of the internal connection terminal and electrically connecting the pair of internal connection terminals to each other.

  According to the present invention, the connection portion of the external connection terminal protrudes to the side of the printed board laminate. Thereby, an external electric component can be attached to the side of the printed circuit board laminate, and the thickness dimension of the electric junction box can be reduced.

  Furthermore, the internal connection portion that connects the two printed circuit boards to each other is configured by pressing a single core wire to the pressure contact portion of the internal connection terminal soldered to each printed circuit board. Therefore, unlike the conventional case, it is not necessary to insert both end portions of the inter-board connection terminals into the two printed boards and solder them, and connect the external connection terminals and the internal connection terminals to each of the two printed boards. After soldering to the internal connection terminals of the two printed circuit boards, a single core wire is pressed and connected to each other, thereby reducing the number of times of soldering required for manufacturing the printed circuit board laminate. Also, after soldering the external connection terminal and the internal connection terminal, the printed circuit board can be assembled to the insulating block, so the position of the two printed circuit boards changes due to the thermal expansion of the insulating plate during soldering. It is also possible to avoid the possibility of solder cracks due to the above. At the same time, since the conducting wire is fixed to each internal connection terminal in a pressure contact state, the reliability of electrical connection between the two printed circuit boards can be ensured. In addition, since the internal connection terminals of the two printed circuit boards are connected by single core pressure welding and the two printed circuit boards are not bonded, it is possible to open the two printed circuit boards after assembly. Yes, excellent maintainability can be secured.

  Further, the external connection terminal and the internal connection terminal are formed with a fitting portion having an insertion portion and a contact portion, and the insertion portion is fitted to the outer peripheral portion of the printed circuit board. The printed circuit board is inserted into the through hole, and the contact portion is opposed to the outer peripheral surface of the printed circuit board. As a result, when a pressing force is exerted on the external connection terminal or the internal connection terminal when mounting the external electrical component or pressing the single core wire, the contact portion comes into contact with the outer peripheral surface of the printed circuit board. The supporting force against the pushing force can be obtained on the outer peripheral surface of the. As a result, the occurrence of solder cracks can be suppressed more effectively, and the electrical connection reliability can be further improved. Preferably, the outer peripheral surface of the insulating plate is positioned in the same plane as the outer peripheral surface of the printed circuit board, and the contact portion between the internal connection terminal and the external connection terminal is both on the outer peripheral surface of the printed circuit board and the outer peripheral surface of the insulating plate. It is made to support using. In this way, a more stable support force can be obtained.

  According to a second aspect of the present invention, in the one described in the first aspect, a plurality of partition walls extending in the stacking direction of the two printed circuit boards are arranged on the outer peripheral surface of the insulating block. The conducting wire is disposed between a pair of partition walls adjacent to each other in the arrangement direction.

  According to this aspect, by interposing the partition wall portion between the conductive lines, electrical insulation between the conductive lines can be ensured. Moreover, a conductive line can also be protected by accommodating each conductive line between partition walls.

  According to a third aspect of the present invention, in the first or second aspect, a plurality of positioning protrusions are formed on the outer peripheral surface of the insulating block and are adjacent in the arrangement direction. The external connection terminal or the internal connection terminal is fitted between the pair of positioning protrusions.

  If it does in this way, the backlash of these connection terminals can be prevented by pinching | interposing an external connection terminal and an internal connection terminal with a pair of positioning protrusion. As a result, external electrical components and single core wires can be connected more stably.

  According to a fourth aspect of the present invention, in the one described in any one of the first to third aspects, the two printed boards in the printed board laminate are equal in size to each other. .

  According to this aspect, the external connection portion and the internal connection portion can be provided on any outer peripheral portion of the printed board. Thereby, the effective utilization of a printed circuit board can be aimed at. Preferably, the two printed circuit boards have a rectangular plate shape having the same size, and at least one of the external connection part and the internal connection part is provided on all four side surfaces of the printed circuit board laminate.

  According to a fifth aspect of the present invention, in the one described in any one of the first to fourth aspects, the case includes an upper case and a lower case that are assembled to each other in the stacking direction of the printed circuit board laminate. On the other hand, a housing case provided with a component housing portion for housing the external electrical component is provided, and the connection portion of the external connection terminal is housed in the component housing through a terminal insertion hole penetrating the housing case. The housing case protrudes into the portion and is held between the upper case and the lower case.

  According to this aspect, the housing case into which the external connection terminal is inserted is separated from the upper case and the lower case, and the upper case and the lower case are assembled after the housing case is attached to the external connection portion. . Thereby, the location which penetrates the terminal protruded from the printed circuit board laminated body in the upper case or the lower case can be reduced, and the assembly of the upper case and the lower case can be made easier. In addition, by holding the storage case between the upper case and the lower case, it is possible to prevent the storage case from being disconnected when the external electrical component is removed.

  According to the present invention, by connecting the connection portion of the external connection terminal to the side of the printed circuit board laminate, the external electrical component can be attached to the side of the electrical connection box, and the thickness of the electrical connection box The size can be reduced. In addition, since the internal connection terminals of the two printed circuit boards are connected to each other by single core pressure welding, it is not necessary to use solder to connect the two printed circuit boards, so the number of times of soldering can be reduced. It is possible to improve the manufacturing efficiency. At the same time, soldering with an insulating plate interposed between printed circuit boards is not required, reducing the risk of solder cracks due to thermal expansion of the insulating plate, and connection reliability. Can be secured. In addition, it is possible to reduce the risk of solder cracks by supporting the contact part of the external connection terminal and internal connection terminal on the outer peripheral surface of the printed circuit board when connecting external electrical components or pressing the single core wire. Yes, connection reliability can be further improved.

The disassembled perspective view of the electrical-connection box as one Embodiment of this invention. The perspective view of the printed circuit board laminated body which comprises the electrical-connection box shown in FIG. The side view of a board | substrate laminated body. The side view different from FIG. 3 of a printed circuit board laminated body. The side view different from FIG. 3 and FIG. 4 of a printed circuit board laminated body. The perspective view of a press-contact terminal. The top view of an insulation block. The side view of an insulation block. The side view corresponding to FIG. 4 of an insulation block. The side view corresponding to FIG. 5 of an insulation block. Sectional drawing of the state which assembled | attached the connector storage case and the fuse storage case to the printed circuit board laminated body. The side view of an upper case. The back view of an upper case. The perspective view of an electric junction box.

  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. In the electrical junction box 10, a printed circuit board laminate 22 including two printed circuit boards 18 a and 18 b and an insulating block 20 is accommodated in a case 16 including the upper case 12 and the lower case 14. It is structured.

  2 to 5 show the printed board laminate 22. The printed circuit board laminate 22 has a structure in which a first printed circuit board 18a and a second printed circuit board 18b are stacked with an insulating block 20 interposed therebetween.

  The first and second printed circuit boards 18a and 18b are conventionally known printed circuit boards having a substantially rectangular plate shape with printed circuits (not shown) as wiring circuits formed on the surfaces thereof. A plurality of through holes 24 are provided along outer peripheral surfaces 26a to 26d (see FIG. 1) at respective outer peripheral ends located on the four sides of the printed boards 18a and 18b. In addition, a bolt insertion hole 25 is provided through the central portion of both the printed circuit boards 18a and 18b, and a pair of positioning holes 27 and 27 are provided through one diagonal line. In the present embodiment, the first printed circuit board 18a and the second printed circuit board 18b have the same size, and each through hole 24 is formed at the same position on both printed circuit boards 18a and 18b. . That is, the first printed circuit board 18a and the second printed circuit board 18b are the same as each other with respect to the size and the position where the through hole 24 is formed. Hereinafter, the first printed circuit board 18a will be described as an example.

  As shown in FIG. 2, a plurality of press contact terminals 28 as internal connection terminals, a plurality of linear terminals 30 as external connection terminals, a tab terminal 32, and a fuse terminal 34 are soldered to the first printed circuit board 18a. Has been. FIG. 6 shows the press contact terminal 28. The press contact terminal 28 is formed by press punching a conductive metal plate such as iron, copper, or brass having a surface plated with tin or the like. A flat overlapping portion 36 is formed in the central portion of the press contact terminal 28. An insertion portion 38 is formed at one end of the press contact terminal 28 by bending one end of the overlapping portion 36 and raising it perpendicular to the overlapping portion 36. The insertion portion 38 has a smaller width than the overlapping portion 36 and can be loosely inserted without being press-fitted into the through hole 24.

  Also, the end of the overlapping portion 36 opposite to the insertion portion 38 is bent and raised in the same direction as the insertion portion 38 perpendicular to the overlapping portion 36, so that the other end of the overlapping portion 36 is raised. The contact part 40 is formed in the part. The contact portion 40 is formed so as to be folded back from the insertion portion 38 and extend in parallel to the insertion portion 38. The projecting dimension of the contact part 40 from the overlapping part 36 is larger than the thickness dimension of the first printed circuit board 18a. Thus, the press contact terminal 28 is formed with the insertion portion 38 and the contact portion 40 extending in the same direction from both end edges of the overlapping portion 36, and a U-shaped fitting portion in a side view. 42 is formed.

  Then, the end of the contact portion 40 extending from the overlapping portion 36 is bent, so that the pressure contact portion 44 extends outward from the fitting portion 42 in a direction orthogonal to the extending direction of the contact portion 40. Is formed. The pressure contact portion 44 has a substantially U shape in which a pair of pressure contact pieces 46 are opposed to each other with a gap. In addition, the front-end | tip part of the press-contacting pieces 46 and 46 is expanded outward, and insertion of the single core wire 86 mentioned later is made easy.

  On the other hand, although detailed illustration is omitted, a fitting portion 42 is also formed in each of the linear terminal 30, the tab terminal 32, and the fuse terminal 34 constituting the external connection terminal (see FIGS. 2 to 5). . The linear terminal 30 is formed, for example, by cutting and bending a metal wire with a predetermined length. The linear terminal 30 has a substantially constant substantially square cross section over its entire length. In the linear terminal 30, the extending end portion of the contact portion 40 from the overlapping portion 36 is bent to extend outward of the fitting portion 42 in a direction orthogonal to the extending direction of the contact portion 40. A connecting portion 48 is formed. The connecting portion 48 extends linearly with a substantially square cross-sectional shape.

  The connection part 48 of the tab terminal 32 extends linearly with a substantially rectangular cross-sectional shape, and has a larger width dimension than the connection part 48 of the linear terminal 30. Note that the tab terminal 32 has a width dimension of the insertion portion 38 that is the same as the press contact terminal 28. On the other hand, the connecting portion 48 of the fuse terminal 34 has a so-called tuning fork shape used for connecting a conventionally known fuse or the like. The fuse terminal 34 is formed with a pair of insertion portions 38, 38.

  The press contact terminal 28, the linear terminal 30, the tab terminal 32, and the fuse terminal 34 are soldered to the first printed circuit board 18a and the second printed circuit board 18b, respectively. In the present embodiment, the insertion portion 38 of the press contact terminal 28 is inserted and soldered into the through hole 24 provided on the outer peripheral surface 26a side of the first printed circuit board 18a and the outer peripheral surface 26c side opposite thereto. The On the other hand, the through hole 24 provided on the outer peripheral surface 26b side is inserted and soldered with the insertion portions 38 of the linear terminals 30 and the tab terminals 32, and on the outer peripheral surface 26d side opposite to the outer peripheral surface 26b. The insertion portion 38 of the fuse terminal 34 is inserted through the provided through hole 24 and soldered. In the present embodiment, the insertion portion 38 of each terminal 28, 30, 32, 34 is loosely inserted into the through hole 24 in a non-press-fitted state, so that a special pushing force is not required. Can be easily inserted.

  Each terminal 28, 30, 32, 34 is fitted to the outer peripheral portion of the printed circuit boards 18 a, 18 b located between the through hole 24 and the outer peripheral surfaces 26 a to 26 d when the insertion portion 38 is inserted into the through hole 24. Are fitted together. Then, when the connecting portion between the insertion portion 38 and the overlapping portion 36 comes into contact with the opening peripheral edge portion of the through hole 24, the insertion amount of the insertion portion 38 can be easily and accurately defined. Furthermore, in the soldered state to the printed circuit boards 18a and 18b, the overlapping part 36 extends out of the printed circuit boards 18a and 18b from the insertion part 38, so that the contact part 40 becomes the first printed circuit board 18a. The outer peripheral surface 26 is opposed to the outer side. The extending end portion of the contact portion 40 from the overlapping portion 36 is located on the opposite side from the overlapping portion 36 in the thickness direction of the first printed circuit board 18a. As a result, the press contact portion 44 orthogonal to the contact portion 40 is projected and extended outward of the first printed circuit board 18a perpendicular to the outer peripheral surface 26a (26c) of the first printed circuit board 18a. . Similarly, the connection portion 48 of the linear terminal 30 and the connection portion 48 of the tab terminal 32 are projected and extended outward of the first printed circuit board 18a perpendicular to the outer peripheral surface 26b, and the fuse terminal 34 The connecting portion 48 is projected and extended outward of the first printed circuit board 18b perpendicular to the outer peripheral surface 26d.

  The first printed circuit board 18a and the second printed circuit board 18b having such a structure are stacked with the insulating block 20 interposed therebetween. The insulating block 20 is shown in FIGS. The insulating block 20 has a thick rectangular block shape, and is an integrally molded product formed from a non-conductive synthetic resin. The insulating block 20 is provided with a plurality of through holes 52 extending in the thickness direction to reduce the resin material, reduce the weight, and reduce the amount of thermal deformation. A bolt hole 56 is provided at the center of the overlapping surfaces 54a and 54b on which the first and second printed circuit boards 18a and 18b are overlapped in the insulating block 20, and one of the overlapping surfaces 54a and 54b is provided on each of the overlapping surfaces 54a and 54b. A pair of positioning projections 58 and 58 are formed so as to protrude on the diagonal line with the bolt hole 56 interposed therebetween. Further, relief grooves 60, 60 that are continuous over the entire circumference are formed on the outer peripheral portions of the overlapping surfaces 54a, 54b.

  In the insulating block 20, a plurality of partition walls 64 are integrally formed on the outer peripheral surfaces 62a and 62d located on the same side as the outer peripheral surfaces 26a and 26c of the first and second printed circuit boards 18a and 18b. Since the outer peripheral surfaces 62a and 62d have the same shape, the outer peripheral surface 62a will be described below.

  The partition wall portion 64 extends in the stacking direction of the first printed circuit board 18a and the second printed circuit board 18b (vertical direction in FIG. 8), and protrudes outward of the insulating block 20 perpendicular to the outer peripheral surface 62a. Is formed. And the some partition wall part 64 is formed in the length direction (left-right direction in FIG. 8) of the outer peripheral surface 62a in the arrangement | sequence state spaced apart by the predetermined interval. Accordingly, the pair of partition walls 64 and 64 adjacent to each other in the arrangement direction extend in the stacking direction of the two printed circuit boards 18a and 18b, and are accommodated in the housing recesses 66 that open to the side of the insulating block 20 and to both sides in the extending direction. Is formed.

  As shown in FIG. 8, the partition wall 64 protrudes by the thickness of both printed circuit boards 18a and 18b toward the outside of the overlapping surfaces 54a and 54b in the stacking direction of both printed circuit boards 18a and 18b. These projecting portions serve as positioning projections 68. The thickness dimension of the partition wall portion 64 (the dimension in the left-right direction in FIG. 8) is slightly reduced at the positioning projection 68. The distance between the positioning protrusions 68 adjacent to each other in the length direction of the outer peripheral surface 26a (the left-right direction in FIG. 8) is the width of the contact portion 40 at the press contact terminal 28 so that the press contact terminal 28 can be fitted. It is made approximately equal to the dimension.

  On the other hand, as shown in FIG. 9, in the insulating block 20, a positioning plate portion 70 is integrally formed on the outer peripheral surface 62b located on the same side as the outer peripheral surface 26b of the first and second printed circuit boards 18a and 18b. Yes. The positioning plate portion 70 has a length dimension (dimension in the left-right direction in FIG. 9) substantially equal to the outer peripheral surface 62b and a width dimension (in FIG. 9, in FIG. 9) larger than the outer peripheral surface 62b by the thickness of both printed circuit boards 18a and 18b. It has a substantially longitudinal rectangular plate shape having a vertical dimension). A plurality of terminal accommodating holes 72a and 72b are formed in the positioning plate portion 70. The terminal receiving holes 72a and 72b are formed in a slit shape extending from both edge portions in the width direction (vertical direction in FIG. 9) of the positioning plate portion 70 toward the center portion in the width direction of the positioning plate portion 70. It opens to the edge part of the width direction both ends of the part 70, and outward. The terminal receiving hole 72 a has a groove width dimension (dimension in the left-right direction in FIG. 9) substantially equal to that of the linear terminal 30, while the terminal receiving hole 72 b has a groove width dimension substantially equal to that of the tab terminal 32. A terminal accommodating hole 72a is formed at a position corresponding to the linear terminal 30, and a terminal accommodating hole 72b is formed at a position corresponding to the tab terminal 32. The plurality of terminal accommodating holes 72a and the terminal accommodating holes are formed. 72b are arranged at an appropriate interval in the length direction of the outer peripheral surface 62b.

  These terminal accommodating holes 72a and 72b are formed so as to penetrate the positioning plate portion 70 in the thickness direction, and the outer peripheral surface 62b of the insulating block 20 faces the groove bottom surfaces of the terminal accommodating holes 72a and 72b. Further, the portions of the positioning plate portion 70 that protrude from the overlapping surfaces 54a and 54b and are located on both sides in the width direction (left and right direction in FIG. 9) of the terminal receiving holes 72a and 72b are the positioning protrusions 74. ing. By arranging the plurality of terminal receiving holes 72a and 72b, the plurality of positioning projections 74 are arranged at a predetermined interval in the length direction of the outer peripheral surface 62b, and the arrangement direction (in FIG. 9, The separation distance in the left-right direction is set to a size that allows the linear terminal 30 or the tab terminal 32 to be fitted into the terminal receiving holes 72a and 72b.

  Further, as shown in FIG. 10, in the insulating block 20, a positioning plate portion 76 is integrally formed on the outer peripheral surface 62d located on the same side as the outer peripheral surface 26d of the first and second printed circuit boards 18a and 18b. Yes. The positioning plate portion 76 has a plate shape having a size substantially equal to that of the positioning plate portion 70. In the positioning plate portion 76, a plurality of terminal receiving holes 72 c are formed at predetermined intervals in the length direction of the positioning plate portion 76. The terminal accommodating hole 72c is formed in a rectangular notch shape that opens outward from both end edges in the width direction (vertical direction in FIG. 10) of the positioning plate portion 76 and penetrates the positioning plate portion 76 in the thickness direction. ing. The terminal accommodating hole 72 c has a groove width dimension (dimension in the left-right direction in FIG. 10) equal to the width dimension of the fuse terminal 34 and is formed at a position corresponding to the fuse terminal 34. Similarly to the positioning plate 70, positioning protrusions 78 are formed on both sides of the terminal receiving hole 72c in the width direction.

  The first printed circuit board 18 a to which the linear terminals 30, the tab terminals 32, the fuse terminals 34, and the press contact terminals 28 are soldered is superimposed on the overlapping surface 54 a of the insulating block 20. The first printed circuit board 18a is positioned on the overlapping surface 54a by inserting the positioning projection 58 into the positioning hole 27, and the bolt 80 is screwed into the bolt hole 56 through the bolt insertion hole 25, thereby insulating the first printed board 18a. It is fixed to the block 20. The insertion portions 38 of the terminals 30, 32, 34, and 28 protruding from the first printed circuit board 18a are accommodated in the escape grooves 60, so that the first printed circuit board 18a is placed on the overlapping surface 54a. On the other hand, they are overlapped with almost no gap. Similarly, the second printed circuit board 18b is fixed to the insulating block 20 in a state of being superimposed on the other overlapping surface 54b.

  In the fixed state to the insulating block 20, the outer peripheral surfaces 26a to 26d of the first and second printed circuit boards 18a and 18b are positioned on the same plane as the outer peripheral surfaces 62a to 62d of the insulating block 20, respectively. As shown in FIG. 3, the contact portions 40 of the plurality of press contact terminals 28 provided on the outer peripheral surface 26 a side and the outer peripheral surface 26 c side in both printed circuit boards 18 a and 18 b are respectively provided in the housing recesses of the insulating block 20. 66, the outer peripheral surface 26a (26c) of each printed circuit board 18a, 18b and the outer peripheral surface 62a (62b) of the insulating block 20 are opposed to each other. At the same time, the press contact portion 44 of each press contact terminal 28 is located on the outer peripheral surface 26a (26c) of the insulating block 20 and protrudes outward. Thereby, the pressure contact portion 44 of the pressure contact terminal 28 of the first printed circuit board 18a and the pressure contact portion 44 of the pressure contact terminal 28 of the second printed circuit board 18b are stacked in the housing recess 66 in the stacking direction of the two printed circuit boards 18a and 18b. At the opposite position.

  Further, as shown in FIG. 4, the contact portions 40 of the plurality of linear terminals 30 and tab terminals 32 provided on the outer peripheral surface 26 b side are respectively accommodated in the terminal accommodating holes 72 a and 72 b of the insulating block 20. The connection portions 48 of the terminals 30 and 32 are located on the outer peripheral surface 26b of the insulating block 20 and protrude outward. Thus, a connector connection portion 82 as an external connection portion is formed by the plurality of linear terminals 30 and tab terminals 32 on the outer peripheral surface 26 b side of the printed circuit board laminate 22. Further, as shown in FIG. 5, the contact portions 40 of the plurality of fuse terminals 34 provided on the outer peripheral surface 26d side are respectively accommodated in the terminal accommodating holes 72c, and the connection portions 48 of the respective fuse terminals 34 are It protrudes outward on the outer peripheral surface 26 d of the insulating block 20. Thereby, the connection part 48 of the fuse terminal 34 of the 1st printed circuit board 18a and the connection part 48 of the fuse terminal 34 of the 2nd printed circuit board 18b oppose each other in the lamination direction of both the printed circuit boards 18a and 18b. Accordingly, a fuse connection portion 84 as an external connection portion is formed on the outer peripheral surface 26d side of the printed board laminate 22.

  As shown in FIG. 3, on the outer peripheral surfaces 26a, 26c side, the pressure contact portion 44 of the pressure contact terminal 28 of the first printed circuit board 18a and the second printed circuit board 18b facing each other in the accommodation recess 66. A single core wire 86 as a conducting wire is pressed against the press contact portion 44 of the press contact terminal 28. As shown in FIG. 2, the single core wire 86 is formed by covering a core wire 88 made of a conductive metal wire with an insulating coating 90. Such a single core wire 86 is inserted between the press contact pieces 46, 46 of the press contact terminal 28, and the coating 90 is cut by the press contact pieces 46, 46, whereby the core wire 88 is held between the press contact pieces 46, 46. Thus, the pressure contact pieces 46 and 46 are electrically connected. The single core wire 86 is disposed in the housing recess 66 to be protected. As a result, the press contact terminal 28 of the first printed circuit board 18a and the press contact terminal 28 of the second printed circuit board 18b are electrically connected to each other via the single core wire 86, and the printed circuit of the first printed circuit board 18a. And the printed circuit of the second printed circuit board 18b are connected to each other. As a result, the press contact terminal 28 of the first printed circuit board 18a and the press contact terminal 28 of the second print circuit board 18b are connected to the outer peripheral surface 26a side and the outer peripheral surface 26c side of the printed circuit board laminate 22. The internal connection parts 92 and 92 are formed by the single core wire 86 to be formed.

  As shown in FIG. 11, a connector housing case 94 as a housing case is attached to the connector connection portion 82 of the printed circuit board laminate 22, while a fuse housing case 96 as a housing case is attached to the fuse connection portion 84. Installed. The connector housing case 94 is an integrally molded product made of non-conductive synthetic resin, and the components are housed in a substantially longitudinal rectangular plate portion 98 that is larger than the outer peripheral surface of the printed circuit board laminate 22 on the connector connecting portion 82 side. Two connector hoods 100, 100 as a portion project. The connector hood 100 has a conventionally known shape, and can accommodate a connector as an external electric component (not shown). In each connector hood 100, 100, a plurality of terminal insertion holes 102 penetrating the plate portion 98 in the thickness direction (left-right direction in FIG. 12) are linearly projected to the side of the printed circuit board laminate 22. It is formed at a position corresponding to the connection portion 48 of the terminal 30 and the connection portion 48 of the tab terminal 32.

  Then, the connection portion 48 of the linear terminal 30 protruding to the side of the printed circuit board laminate 22 in the connector connection portion 82 and the connection portion 48 of the tab terminal 32 are in the corresponding terminal insertion holes 102 of the connector housing case 94. By being inserted respectively, the plate portion 98 is overlapped with the positioning plate portion 70 of the insulating block 20, and each connection portion 48 protrudes into the connector hood 100. Thereby, the connector housing case 94 is mounted on the side surface of the printed circuit board laminate 22 on the outer peripheral surface 26b side, and the connector mounting portion 104 is formed. Then, a mating connector (not shown) as an external electrical component is inserted into the connector hood 100 and connected to the connecting portion 48 of the linear terminal 30 and the tab terminal 32, thereby electrically connecting the printed circuit of the printed circuit boards 18a and 18b. Connected to.

  On the other hand, the fuse housing case 96 has substantially the same structure as the connector housing case 94 except that the connector hood 100 in the connector housing case 94 is a plurality of fuse housing portions 106 as component housing portions. . The fuse accommodating portion 106 has a conventionally known shape and can accommodate a fuse as an external electric component (not shown). Such a fuse accommodating portion 106 corresponds to the fuse terminals 34, 34 of both the printed boards 18a, 18b facing each other in the stacking direction of the first printed board 18a and the second printed board 18b. A plurality are formed in the length direction. Further, a pair of terminal insertion holes 102 and 102 corresponding to the fuse terminals 34 and 34 of both printed circuit boards 18a and 18b are opened in each fuse accommodating portion 106. Similarly to the connector housing case 94, the connection portion 48 of the fuse terminal 34 is inserted into the terminal insertion hole 102 of the fuse housing case 96, and the plate portion 98 is overlaid on the positioning plate portion 76 of the insulating block 20. The connecting portion 48 of the fuse terminal 34 of the first printed circuit board 18a and the connecting portion 48 of the fuse terminal 34 of the second printed circuit board 18b are opposed to each other in the fuse housing portion 106. As a result, the fuse housing case 96 is mounted on the outer peripheral surface 26d side of the printed circuit board laminate 22, and the fuse mounting portion 108 is formed. Then, a fuse (not shown) as an external electric component is inserted into the fuse housing portion 106 and connected to the connection portion 48 of the fuse terminal 34, thereby being electrically connected to the printed circuits of the printed boards 18a and 18b.

  Further, the upper case 12 and the lower case 14 are assembled to the printed circuit board laminate 22 on which the connector housing case 94 and the fuse housing case 96 are mounted. Both the upper case 12 and the lower case 14 are integrally formed products made of non-conductive synthetic resin. 12 and 13 show the upper case 12. The upper case 12 has a substantially rectangular box body that is provided with peripheral walls 112a to 112d that protrude from the outer peripheral edge portion of the substantially rectangular plate-like plate portion 110 that covers the surface of the printed circuit board 18a over the entire circumference. It is made into a shape. The peripheral walls 112a to 112d are positioned on the outer peripheral surfaces 26a to 26d side of the printed circuit board laminate 22 respectively. In the plate part 110, a cylindrical fitting cylinder part 111 is formed at a position overlapping the positioning protrusion 58 of the insulating block 20. In particular, the outer surface of the plate portion 110 in the present embodiment has a flat shape that does not have a connector hood or a fuse housing portion. In the peripheral wall 112b and the peripheral wall 112d, a notch-shaped insertion window that penetrates the peripheral walls 112b and 112d is provided at a position overlapping the pair of connector hoods 100 and 100 of the connector storage case 94 and the fuse storage portion 106 of the fuse storage case 96. 114a, 114a, 114a are formed, respectively. Furthermore, slit-like fitting grooves 116a and 116a extending in the length direction of the peripheral walls 112b and 112d are formed inside the peripheral walls 112b and 112d, respectively.

  On the other hand, the lower case 14 has a shape slightly smaller than the upper case 12 so that the upper case 12 can be externally fitted. Since the lower case 14 has substantially the same shape as the upper case 12, the same reference numerals as those of the upper case 12 are used in the drawing, and detailed description thereof is omitted. That is, insertion windows 114b, 114b, 114b are formed in the peripheral walls 112b, 112d of the lower case 14, and fitting grooves 116a, 116a are formed inside the peripheral walls 112b, 112d, respectively.

  Then, as shown in FIG. 1, the upper case 12 is superimposed on the printed circuit board laminate 22 from the first printed circuit board 18a side in the stacking direction of the first and second printed circuit boards 18a and 18b. It is done. The upper case 12 is assembled to the printed circuit board laminate 22 by the positioning projection 58 of the insulating block 20 protruding through the positioning hole 27 of the first printed circuit board 18a being inserted into the fitting cylinder portion 111 and fitted. It is done. Similarly, the lower case 14 is assembled to the printed board laminate 22 from the second printed board 18b side. As a result, as shown in FIG. 14, the upper case 12 is externally fitted to the lower case 14, and the printed circuit board laminate 22 is accommodated in a case 16 configured to include both cases 12 and 14.

  When the upper case 12 and the lower case 14 are assembled, the connector housing case 94 and the plate portions 98 and 98 of the fuse housing case 96 mounted on the side surface of the printed circuit board laminate 22 are fitted into the fitting grooves formed in both the cases 12 and 14. By being inserted into 116a, 116b, it is sandwiched between both cases 12, 14 and is held in an unremovable state. As a result, the connector hoods 100 and 100 of the connector housing case 94 and the fuse housing portion 106 of the fuse housing case 96 are projected to the side of the case 16 through the insertion windows 114 a and 114 b of the upper case 12 and the lower case 14.

  According to the electrical junction box 10 having such a structure, the connecting portion 48 of the linear terminal 30, the tab terminal 32, and the fuse terminal 34 protrudes to the side of the printed circuit board laminate 22, so that the connector The mounting portion 104 and the fuse housing portion 106 are both formed using the side surface of the electrical junction box 10. Thereby, size reduction of the thickness dimension of the electrical junction box 10 can be achieved. In particular, in the present embodiment, since there are no terminals protruding from the printed circuit board laminate 22 toward the plate portions 110 and 110 of the upper case 12 and the lower case 14, the plate portions 110 and 110 have a simple flat shape. I can do it. However, it is of course possible to provide connection terminals on the first printed circuit board 18a and the second printed circuit board 18b so as to form a connection part with a connector, a fuse or the like on the plate part 110.

  And as shown in FIG. 11, the contact part 40 of the linear terminal 30 and the contact part 40 of the tab terminal 32 are facing the outer peripheral surface 26b of the printed circuit board 18a (18b). As a result, when a mating connector (not shown) is connected to the linear terminal 30 and the tab terminal 32 and a pressing force is exerted on the linear terminal 30 and the tab terminal 32, the contact portion 40 is applied to the outer peripheral surface 26b. By contacting, the linear terminal 30 and the tab terminal 32 can be supported by the outer peripheral surface 26b. As a result, it is possible to reduce the external force exerted on the soldered portions of the linear terminals 30 and the tab terminals 32, and to suppress the occurrence of solder cracks. In particular, in the present embodiment, the outer peripheral surface 62b of the insulating block 20 is positioned on the same plane as the outer peripheral surfaces 26b, 26b of the first and second printed circuit boards 18a, 18b, and the contact portions 40 of the terminals 30, 32 are located. However, since it is also opposed to the outer peripheral surface 62b of the insulating block 20, the contact portion 40 can be supported by both the outer peripheral surface 26b of the printed circuit board 18a (18b) and the outer peripheral surface 62b of the insulating block 20. , More stable support force can be obtained. Similarly, the contact portion 40 of the fuse terminal 34 is supported by the outer peripheral surface 26d of the printed circuit board 18a (18b) and the outer peripheral surface 62d of the insulating block 20, so that the fuse terminal 34 is connected when a fuse (not shown) is connected. The occurrence of cracks in the soldering portion can be suppressed.

  Further, as shown in FIG. 4, the linear terminal 30 and the tab terminal 32 are fitted between the positioning protrusions 74, 74 provided on both sides. Thereby, the position shift of the connection part 48 in the left-right direction (left-right direction in FIG. 4) can also be suppressed, and the mating connector can be stably inserted and removed. Similarly, the fuse terminal 34 can be inserted between the positioning protrusions 78 on both sides to suppress the displacement of the connecting portion 48, so that the fuse can be stably inserted and removed.

  On the other hand, also in the internal connection part 92, the contact part 40 of each press-contact terminal 28 is opposed to the outer peripheral surface 26a (26c) of the printed circuit board 18a (18b) and the outer peripheral surface 62a (62c) of the insulating block 20. . Thus, when the single core wire 86 is pressed, the contact portion 40 is supported by the outer peripheral surfaces 26a (26c) and 62a (62c), thereby suppressing the occurrence of cracks in the soldered portion of the press contact terminal 28. . In particular, in the present embodiment, each press contact terminal 28 is fitted between the positioning protrusions 68 provided on both sides, so that the position of the press contact portion 44 in the left-right direction (the left-right direction in FIG. 3). The deviation is also suppressed, and the single core wire 86 can be stably pressed.

  And since the single core wire 86 is press-contacted to the press-contact part 44, while being able to firmly assemble the single core wire 86 to the press-contact terminal 28, fear of a solder crack etc. can also be avoided. Thereby, high electrical connection reliability can be obtained between the press contact terminal 28 of the first printed circuit board 18a and the press contact terminal 28 of the second printed circuit board 18b. Further, when the printed circuit board laminate 22 is manufactured, the press contact terminals 28 are soldered to the first printed circuit board 18a and the second printed circuit board 18b in the same process as the linear terminals 30 and the fuse terminals 34, respectively. Since the press contact terminals 28 and 28 of both the printed circuit boards 18a and 18b may be connected to each other by pressing the single core wire 86, the two printed circuit boards 18a and 18b can be connected without using soldering. . Thereby, the frequency | count of soldering can be reduced and the improvement of manufacturing efficiency can be aimed at. In addition, since both printed circuit boards 18a and 18b are only connected by a single core wire 86, both printed circuit boards 18a and 18b can be opened after assembly, and excellent maintainability is achieved. You can also get it.

  Further, since the press contact terminal 28, the linear terminal 30, the tab terminal 32, and the fuse terminal 34 are all disposed on the outer peripheral portions of the first and second printed circuit boards 18a and 18b, both the printed circuit boards 18a and 18b. The effective space can be secured more advantageously. Furthermore, in this embodiment, since the first printed circuit board 18a and the second printed circuit board 18b have the same size, all of the four outer peripheral surfaces 26a to 26d can be used, and the external connection The connector connection portion 82, the fuse connection portion 84, and the internal connection portion 92 as the portions can be formed more 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 outer peripheral surfaces 62a to 62d of the insulating block 20 are positioned more inward than the outer peripheral surfaces 26a to 26d of the first and second printed circuit boards 18a and 18b, and the pressure contact terminals 28, the linear terminals 30 and the like are in contact with each other. The portion 40 may be supported only by the outer peripheral surfaces 26a to 26d of the respective printed circuit boards 18a and 18b.

  Further, the sizes of the first printed circuit board 18a and the second printed circuit board 18b may be different from each other. Further, three or more printed circuit boards may be stacked, and two of them may be appropriately selected and connected to each other. Furthermore, in the printed circuit board laminate 22 of the above-described embodiment, any one of the connector connection portion 82, the fuse connection portion 84, and the internal connection portion 92 is provided on each of the side surfaces where the outer peripheral surfaces 26a to 26d are located. However, as a matter of course, it is possible to provide the connector connecting portion 82, the fuse connecting portion 84, and the internal connecting portion 92 on one side surface in an appropriate combination.

  In the connector connecting portion 82 in the embodiment, the linear terminals 30 and the tab terminals 32 protrude from the first and second printed boards 18a and 18b, so that the terminals 30 and 32 are arranged in two rows. For example, the terminals 30 and 32 are provided only on one of the printed boards 18a and 18b, or the length dimension of the contact portion 40 is adjusted to be provided on the printed boards 18a and 18b. The connection portions 48 of the linear terminals 30 and the tab terminals 32 may be arranged in one row or three or more rows, or a connection terminal is further provided on both or one of the printed boards 18a and 18b. May be formed with connector connecting portions arranged in three or more rows.

10: Electrical connection box, 16: Case, 18a, 18b: Printed circuit board, 20: Insulating block, 22: Printed circuit board laminate, 24: Through hole, 26a to d: Outer peripheral surface (printed circuit board), 28: Pressure contact terminal ( Internal connection terminal), 30: linear terminal (external connection terminal), 32: tab terminal (external connection terminal), 34: fuse terminal (external connection terminal), 38: insertion part, 40: contact part, 42: fitting Joint part, 44: Pressure contact part, 48: Connection part, 62a to d: Outer peripheral surface (insulation block), 64: Partition wall part, 68, 74, 78: Positioning protrusion, 72a, b, c: Terminal receiving hole, 82: Connector connection portion (external connection portion), 84: Fuse connection portion (external connection portion), 86: Single core wire, 92: Internal connection portion, 94: Connector housing case, 96: Fuse housing case, 102: Terminal insertion hole

Claims (5)

Two printed circuit boards are stacked and arranged, and an external connection part for connecting a wiring circuit on each printed circuit board to an external electrical component, and an internal for connecting the wiring circuits on the two printed circuit boards to each other In the electrical junction box in which the printed circuit board laminate provided with the connection portion is accommodated in the case,
An insulating block is disposed between the two printed circuit boards, while an outer peripheral portion of each printed circuit board is inserted into a through hole of the printed circuit board and soldered, and the inserted An external connection terminal and an internal connection terminal having a fitting portion that is folded from a portion and formed with an outer peripheral surface of the printed circuit board and an abutting portion facing the outer peripheral surface of the insulating block. In the terminal, the external connection portion is configured by projecting a connection portion bent and extended from the contact portion to the side of the printed circuit board laminate from the outer peripheral surface of the insulating block. A pressure contact portion that is bent and extended from the abutting portion in the internal connection terminal protrudes from the outer peripheral surface of the insulating block to the side of the printed circuit board laminate, and one of the prints A conductive wire is pressed into contact with the pressure contact portion of the internal connection terminal provided on the board and the pressure contact portion of the internal connection terminal provided on the other printed circuit board, and the pair of internal connection terminals are electrically connected to each other. The electrical connection box is characterized in that the internal connection portion is configured.   A plurality of partition wall portions extending in the stacking direction of the two printed circuit boards are arranged and protruded on the outer peripheral surface of the insulating block, and the conduction between the pair of partition wall portions adjacent in the array direction is provided. The electrical junction box according to claim 1, wherein a wire is disposed.   A plurality of positioning projections are arranged on the outer peripheral surface of the insulating block, and the external connection terminal or the internal connection terminal is fitted between a pair of positioning projections adjacent in the arrangement direction. The electrical junction box according to claim 1 or 2.   The electrical junction box according to any one of claims 1 to 3, wherein the two printed boards in the printed board laminate are equal in size to each other.   The case is configured to include an upper case and a lower case that are assembled to each other in the stacking direction of the printed circuit board laminate, and includes a housing case provided with a component housing portion that houses the external electrical component, The connection portion of the external connection terminal protrudes into the component housing portion through a terminal insertion hole provided in the housing case, and the housing case is sandwiched and held between the upper case and the lower case. The electrical junction box according to any one of claims 1 to 4, which is configured as described above.

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