JP2011254647A - Electrical junction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical junction box with a new structure, which can avoid the problem of a warp of a printed board and a solder crack in the case of connection of an external electric component without the need of an insulating member between the printed boards in a printed board laminate and which can reduce manufacture cost in the electrical junction box storing the printed board laminate.SOLUTION: Pedestal blocks 32 and 50, which are formed of synthetic resin and support substrate terminals 34, 52 and 54 which are protrusively arranged on a surface 27 of the printed board 20, are formed to be long. Both ends of the pedestal blocks 32 and 50 are projected from peripheral edges of the printed board 20 and they are supported by a support portion 80 disposed in a case 16. Crank-shaped bent portions 48, 62 and 68 are formed in the substrate terminals 34, 52 and 54, and the bent portions 48, 62 and 68 are fitted into fitting grooves 38, 56a and 56b formed in the pedestal blocks 32 and 50 so as to support them.

Description

  The present invention relates to an electrical junction box that accommodates a printed circuit board laminate, and more particularly to an electrical junction box in which a printed circuit board laminate is provided with board terminals that are connected to external electrical components.

  Conventionally, an electrical junction box in which a printed board laminate is accommodated in a case is known. For example, what is described in JP 2009-26464 A (Patent Document 1) is this. Such a printed circuit board laminate has a structure in which the conductive paths of a plurality of printed circuit boards stacked and arranged with a gap are mutually connected by connection terminals.

  By the way, in addition to connection terminals for connecting to conductive paths of other printed boards, board terminals for connecting to external electrical components such as connectors are soldered to the printed board of the printed board laminate. There are many things. When the external electrical component is connected, the printed circuit board is warped due to the board terminal being pushed in, which may cause a solder crack or damage the electrical circuit on the board. Therefore, conventionally, as described in Patent Document 1, an insulating member made of a synthetic resin is disposed between printed circuit boards, so that an insulating member is used against a pressing force when connecting an external electric component. The printed circuit board was supported.

  However, in such a structure, since an insulating member is required, there is a problem in that the number of parts, the manufacturing cost, and the thickness dimension are increased. In addition, the insulating member thermally expands in the high-temperature environment at the time of soldering or in-vehicle, changing the distance between the printed circuit boards. There was a risk of cracking.

JP 2009-26464 A

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved thereof is an electrical junction box that accommodates the printed board laminate, and does not require an insulating member between the printed boards in the printed board laminate. In addition, it is possible to avoid a problem of warping of a printed circuit board and a solder crack when connecting an external electric component, and to provide an electric junction box having a novel structure capable of further reducing the manufacturing cost. It is in.

  In the first aspect of the present invention, the conductive paths of a plurality of printed circuit boards arranged in a stacked manner with a gap are connected to each other through connection terminals, while connected to external electric components on the surface of the printed circuit board. A synthetic resin pedestal block that is placed on the surface of the printed circuit board and supports the circuit board terminals in an electrical connection box in which a printed circuit board laminate in which the circuit board terminals protrude is housed in a case Is formed in a long shape, and both end portions of the base block protrude from the peripheral edge portion of the printed circuit board and are supported by support portions provided in the case, while the substrate terminal is bent in a crank shape. And the bent portion is fitted and supported in a fitting groove formed in the pedestal block.

  According to this aspect, the board terminal is supported by the pedestal block, and the pedestal block is supported by the case that accommodates the printed board laminate. As a result, when a pushing force is exerted on the board terminal when connecting an external electrical component such as a connector, the pushing force to the board terminal is increased by supporting the board terminal with the base block and the case. Transmission to the printed circuit board can be prevented or reduced. As a result, it is possible to suppress warping of the printed circuit board without providing an insulating member between the stacked printed circuit boards, and to suppress the occurrence of solder cracks at the terminals for the circuit board and the connection terminals provided between the printed circuit boards. I can do it. And since it becomes unnecessary to interpose an insulating member between printed circuit boards, manufacturing cost can be reduced, and the printed circuit board laminate and the electrical junction box can be downsized. Furthermore, it is possible to avoid the possibility of cracks in the soldered portions of the connection terminals due to the thermal expansion of the insulating member, and the connection reliability between the printed circuit boards can be further improved.

  Further, the board terminal in this aspect is supported by being fitted into a fitting groove formed in the pedestal block. Thereby, when soldering to the printed circuit board, the positioning accuracy of the board terminals can be ensured, and it can be easily assembled to the pedestal block as compared with press fitting. And since the board terminal is in the shape of a crank, the soldered part of the board terminal to the printed circuit board is projected from the pedestal block, improving the solder visibility You can also.

  According to a second aspect of the present invention, in the first aspect, the pedestal block has a rectangular rod shape, and reinforcing ribs protrude from both side edges in the width direction.

  According to this aspect, the strength of the pedestal block can be improved. Thereby, the terminal for board | substrates can be supported more firmly. In addition, a bus bar or the like can be disposed between the reinforcing ribs on both sides in the width direction, and the pedestal block can be used more effectively as an insulating member between the printed board and the bus bar.

  A third aspect of the present invention is the positioning according to the first or second aspect, wherein the printed circuit board and the pedestal block are engaged with each other to position the pedestal block on the printed circuit board. The part is provided.

  According to this aspect, the printed circuit board and the pedestal block can be positioned relative to each other. That is, according to the present invention, it is possible to dispose the pedestal block in a non-contact state with respect to the printed circuit board by supporting the pedestal block with the case. By directly engaging the substrates with each other, the pedestal block can be positioned more accurately with respect to the printed circuit board, and the substrate terminals can be positioned more accurately with the printed circuit board.

  According to a fourth aspect of the present invention, in the one according to any one of the first to third aspects, the bent portion of the terminal for the board that is fitted into the fitting groove in the case. And a pressing protrusion that is in contact with the base block from the opposite side.

  According to this aspect, by pressing the board terminal with the pressing projection, the board terminal can be supported by the case against the pulling force exerted on the board terminal when the external electrical component is removed. As a result, the terminal for the board can be supported by the case in both cases of connection and removal of external electrical components, and the risk of warping of the printed circuit board and the occurrence of solder cracks can be more effectively reduced. I can do it.

  According to the present invention, the pedestal block that supports the board terminal is supported by the case, the crank terminal is provided with the bent portion, and the bent part is fitted into the fitting groove of the pedestal block to be supported. I made it. Thereby, when an external electric component is connected to the board terminal, it is possible to reduce the transmission of the pushing force exerted on the board terminal to the printed board. As a result, it is possible to suppress warping of the printed circuit board when connecting external electrical components without interposing an insulating member between the stacked printed circuit boards, and to suppress occurrence of solder cracks. Since the insulating member between the printed boards is not required, the manufacturing cost can be reduced and the risk of solder cracks due to the thermal expansion of the insulating member can be reduced.

The perspective view of the state which removed the upper case of the electrical-connection box as one Embodiment of this invention. II-II sectional drawing in FIG. 1 in the state which attached the upper case. III-III sectional drawing in FIG. 2 in the state which attached the upper case. The perspective view of the fuse base shown in FIG. The side view of the fuse base shown in FIG. The perspective view of the connector base shown in FIG. The side view of the connector base shown in FIG. The perspective view of the back surface of the 1st printed circuit board which attached the fuse base and the connector base. The perspective view of the principal part of an upper case. The perspective view of the bottom face side of the principal part of an upper case. The perspective view of a lower case.

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

  First, FIG. 1 to FIG. 3 show an electrical junction box 10 as an embodiment of the present invention. 1 shows a state in which an upper case 14 described later is removed, and FIGS. 2 and 3 show a state in which a part of the upper case 14 is cut. The electrical junction box 10 has a structure in which the printed circuit board laminate 12 is accommodated in a case 18 constituted by an upper case 14 and a lower case 16.

  As shown in FIGS. 2 and 3, the printed circuit board laminate 12 includes a first printed circuit board 20 and a second printed circuit board 22 that are stacked and spaced from each other. However, the plurality of connection terminals 24 are connected to each other. The plurality of connection terminals 24 have a linear shape, and both end portions thereof are through holes 26a that are provided at a predetermined pitch at both end portions of the first printed circuit board 20 and the second printed circuit board 22, respectively. 26b (see FIG. 2) is inserted and soldered. Thereby, a printed wiring as a conductive path (not shown) provided on the first printed board 20 and a printed wiring as a conductive path (not shown) provided on the second printed board 22 are connected to a plurality of connection terminals. 24 and are electrically connected to each other.

  A fuse pedestal 28 and a connector pedestal 30 are disposed on the surface 27 of the first printed circuit board 20. As shown in FIGS. 4 and 5, the fuse pedestal 28 has a structure in which a fuse block 34 serving as a plurality of board terminals is supported on a pedestal block 32. FIG. 4 shows a state in which a part of the plurality of fuse terminals 34 is removed from the base block 32.

  The pedestal block 32 is formed from a non-conductive synthetic resin. The pedestal block 32 has a rod shape extending in a straight line with a substantially constant cross-sectional shape. The pedestal block 32 in the present embodiment has a substantially H-shaped cross section in which reinforcing ribs 36 and 36 protrude from both side edges in the width direction of the rectangular cross section. The longitudinal dimension of the pedestal block 32 is larger than the width dimension of the first printed circuit board 20.

  A plurality of fitting grooves 38 are formed at predetermined intervals in the longitudinal direction of the pedestal block 32 at both ends in the width direction of the pedestal block 32. The fitting groove 38 has a width dimension slightly larger than that of the fuse terminal 34 so that the fuse terminal 34 can be fitted, and above the pedestal block 32 (upward in FIG. 5) and on the side (right side in FIG. 5). And a notch-shaped groove opening in the left direction). Thereby, the support surface of the fuse terminal 34 is formed by the groove bottom surface 40 of the fitting groove 38.

  Further, positioning projections 42 are formed on both ends 41a and 41b in the longitudinal direction of the base block 32 so as to protrude downward (downward in FIG. 5). The positioning protrusion 42 protrudes below the pedestal block 32 with a circular cross section at the center in the width direction of the pedestal block 32.

  On the other hand, the fuse terminal 34 is a conventionally known one, and is formed, for example, by punching a metal plate such as iron, copper, or brass. A pair of press contact blades 44, 44 are formed to be opposed to each other like a tuning fork at one end of the fuse terminal 34, and a pair of insertion portions 46, 46 are formed at the other end. Yes. Further, as apparent from FIG. 5 and the like, the fuse terminal 34 in the present embodiment is formed with a crank-shaped bent portion 48 at an intermediate portion between the press contact blades 44 and 44 and the insertion portions 46 and 46.

  Moreover, the connector base 30 is shown in FIG. 6 and FIG. The connector base 30 has a structure in which a pin block 52 and a tab terminal 54 as a plurality of board terminals are supported on a base block 50. FIG. 6 shows a state in which a part of the plurality of pin terminals 52 and tab terminals 54 are removed from the pedestal block 50.

  Since the pedestal block 50 has substantially the same structure as the pedestal block 32 of the fuse pedestal 28, parts having the same structure as the pedestal block 32 are denoted by the same reference numerals as the pedestal block 32 in the drawing. The description will be omitted as appropriate. A plurality of fitting grooves 56 a and 56 b are formed at both ends in the width direction of the pedestal block 50 at a predetermined interval in the longitudinal direction of the pedestal block 50. The fitting groove 56a is slightly larger in width than the pin terminal 52 so that the pin terminal 52 can be fitted, while the fitting groove 56b is a tab so that the tab terminal 54 can be fitted. The width is slightly larger than the terminal 54.

  The pin terminal 52 and the tab terminal 54 are conventionally known. The pin terminal 52 is formed by cutting a metal wire such as iron, copper, or brass with a predetermined length, and has a constant square cross section over substantially the entire length. The pin terminal 52 has a connecting portion 58 at one end and an insertion portion 60 at the other end. Between the connecting portion 58 and the insertion portion 60, a crank-shaped bent portion 62 is provided. Is formed. On the other hand, the tab terminal 54 is formed by cutting a rectangular metal wire made of the same metal material as the pin terminal 52 into a predetermined length. Thereby, the tab terminal 54 has a connection part 64 wider than the pin terminal 52 at one end. As in the pin terminal 52, a crank-like bent portion 68 is formed between the connection portion 64 and the insertion portion 66. The insertion portion 66 formed at the end of the tab terminal 54 opposite to the connection portion 64 has a width dimension smaller than that of the connection portion 64 and the bent portion 68 by notching both ends in the width direction. Has been.

  The fuse base 28 and the connector base 30 are attached to the first printed circuit board 20 as follows, for example. First, the fuse terminal 34 is inserted into the jig (not shown) from the press contact blades 44 and 44 side, and the pin terminal 52 and the tab terminal 54 are inserted from the connection portions 58 and 64 side. Thereby, the insertion parts 46, 60, 66 of the fuse terminal 34, the pin terminal 52, and the tab terminal 54 are protruded from the jig, respectively. Subsequently, the base block 32 of the fuse base 28 and the base block 50 of the connector base 30 are overlaid on the jig. As a result, the fuse terminal 34 is fitted into each fitting groove 38 of the pedestal block 32, and the pin terminal 52 and the tab terminal 54 are fitted into each fitting groove 56 a, 56 b of the pedestal block 50. When the first printed circuit board 20 is superimposed on the jig, the insertion portions 46, 60, and 66 of the fuse terminal 34, the pin terminal 52, and the tab terminal 54 protruding on the jig are respectively Each through-hole 26 a penetrating through one printed circuit board 20 is inserted. Then, each insertion part 46, 60, 66 is soldered.

  In this way, the fuse terminal 34, the pin terminal 52, and the tab terminal 54 are projected from the surface 27 of the first printed circuit board 20, and the pedestal blocks 32 and 50 are placed on the surface 27. It is attached. Thereby, the fuse base 28 and the connector base 30 are attached to the first printed circuit board 20. As shown in FIG. 8, in the attached state to the first printed circuit board 20, both longitudinal ends 41 a and 41 b of the pedestal blocks 32 and 50 of the fuse pedestal 28 and the connector pedestal 30 are respectively connected to the first printed circuit board 20. It protrudes outward from the peripheral edge at both ends in the width direction. Further, at both side edges in the width direction of the first printed circuit board 20, semi-circular cutouts 67 and 42 are provided at positions corresponding to the positioning protrusions 42 and 42 of the fuse base 28 and the positioning protrusions 42 and 42 of the connector base 30, respectively. 67, 67, 67 are formed. The positioning protrusions 42 enter the notches 67 and engage with each other, so that the base blocks 32 and 50 of the fuse base 28 and the connector base 30 are respectively positioned on the first printed circuit board 20. Thus, in the present embodiment, the positioning portion is formed by the positioning protrusion 42 and the notch 67.

  As shown in FIG. 5, the fuse terminal 34 has a bent portion 48 fitted in the fitting groove 38 of the pedestal block 32, and the press contact blades 44, 44 are located above the pedestal block 32 (upward in FIG. 5). ) And the insertion portions 46 and 46 are positioned so as to project to the side of the base block 32 (in the right and left directions in FIG. 5). Further, the groove bottom surface 40 in the fitting groove 38 is superimposed on the bent portion 48 from below (lower in FIG. 5). Similarly, as shown in FIG. 7 as an example of the tab terminal 54, the pin terminal 52 and the tab terminal 54 have the bent portions 62 and 68 fitted in the fitting grooves 56a and 56b of the base block 50, respectively. 58 and 64 protrude above the pedestal block 50, and the insertion portions 60 and 66 protrude from the side of the pedestal block 50. Then, the groove bottom surfaces 40, 40 in the fitting grooves 56a, 56b are overlapped with the bent portions 62, 68 from below.

  In addition, at the same time as the soldering of the fuse terminal 34 and the like, one end of the connection terminal 24 is inserted into the first printed board 20 and soldered to the through holes 26a at both ends in the width direction. Then, the other end of the connection terminal 24 protruding from the first printed circuit board 20 is inserted into each through hole 26b of the second printed circuit board 22 and soldered, so that the printed circuit board laminate is obtained. 12 is configured.

  The printed circuit board laminate 12 having such a structure is accommodated between the upper case 14 and the lower case 16. 9 and 10 show the main part of the upper case 14. The upper case 14 is formed of a non-conductive synthetic resin and has a substantially rectangular box shape opening to one side. On both side surfaces of the upper case 14 in the width direction, accommodating portions 69 and 69 projecting outward in the width direction are formed at positions overlapping with support portions 80 and 80 of the lower case 16 described later. In the upper case 14, two connector mounting portions 70 a and 70 b are formed at positions overlapping the connector base 30. The connector mounting portions 70a and 70b are formed with rectangular protruding wall-shaped receiving wall portions 71a and 71b for receiving a connector as an external electric component (not shown) so as to protrude to the outside of the upper case 14. And in the inside surrounded by the accommodating wall portions 71a and 71b, terminal insertion holes 72a and 72b having shapes corresponding to the cross-sectional shapes of the pin terminal 52 and the tab terminal 54 are provided at positions corresponding to the pin terminal 52 and the tab terminal 54, respectively. Each is penetrated.

  As shown in FIG. 10, a pair of pressing protrusions 74 and 74 that protrude toward the lower case 16 are formed on the connector mounting portions 70 a and 70 b so as to face each other. The pressing protrusion 74 is formed by a protruding wall part 76 having a substantially rectangular protruding wall shape and a plurality of fitting protrusions 78 a and 78 b protruding from the protruding wall part 76. The protruding wall portion 76 is opposed to the protruding wall portion 76 of the other pressing protrusion 74 with a predetermined distance, and the opposed distance between the pair of protruding wall portions 76, 76 is the pedestal block 50 in the connector pedestal 30. The width dimension is slightly larger. Further, the fitting protrusions 78a and 78b protrude from the protruding wall portion 76 toward the protruding wall portion 76 of the other pressing protrusion 74 and are at positions corresponding to the fitting grooves 56a and 56b of the base block 50. Terminal insertion holes 72a and 72b are formed at the projecting end portions. The fitting protrusion 78a is sized to fit into the fitting groove 56a, while the fitting protrusion 78b is sized to fit into the fitting groove 56b.

  On the other hand, the lower case 16 is shown in FIG. The lower case 16 is formed of the same synthetic resin as that of the upper case 14 and has a substantially rectangular box shape opening to one side. Support portions 80 are formed at positions where the fuse case 28 and the base blocks 32 and 50 of the connector base 30 respectively overlap with the longitudinal ends 41a and 41b at both ends in the width direction of the lower case 16. The support portion 80 is formed with a flat support surface 82 that protrudes outward in the width direction of the lower case 16. Furthermore, a relief portion 84 having a semicircular cutout shape is formed on the support surface 82 inside the lower case 16.

  A support rib 88 that protrudes in the opening direction of the lower case 16 is formed on the outer peripheral edge of the bottom wall 86 of the lower case 16 continuously over the entire periphery. Further, columnar support protrusions 90 and 90 projecting in the opening direction of the lower case 16 are formed at positions where the fuse base 28 and the connector base 30 overlap at a substantially central portion in the width direction of the bottom wall 86.

  The printed circuit board laminate 12 is accommodated in the lower case 16 having such a structure. The printed circuit board laminate 12 is inserted into the lower case 16 from the second printed circuit board 22. As shown in FIG. 3 and the like, the outer peripheral edge of the second printed circuit board 22 is supported by the support rib 88. Further, circular insertion holes 92 and 92 are provided at positions where the second printed circuit board 22 overlaps with the support protrusions 90 and 90, and the support protrusions 90 and 90 are inserted through the insertion holes 92 and 92. By passing through the second printed circuit board 22, the first printed circuit board 20 is supported by the support protrusions 90 and 90.

  Further, both longitudinal end portions 41a and 41b of the base blocks 32 and 50 of the fuse base 28 and the connector base 30 protruding on both sides in the width direction of the printed circuit board laminate 12 are superimposed on the support surfaces 82 of the lower case 16, respectively. And supported by the support surface 82. As shown in FIG. 3, the lower case 16 has a width dimension in the support portion 80 of the pedestal blocks 32, 50 so that the outer peripheral wall 94 on the support surface 82 is positioned away from the pedestal blocks 32, 50. It is set to be larger than the longitudinal dimension. Thereby, the deformation | transformation of the lower case 16 by the temperature change at the time of vehicle mounting etc. is prevented from exerting on the base blocks 32 and 50. FIG. The positioning protrusions 42 of the pedestal blocks 32 and 50 are inserted into the relief portions 84 of the support portion 80, so that interference with the support portion 80 is avoided.

  Then, the upper case 14 is externally fitted to the lower case 16 in which the printed circuit board laminate 12 is accommodated, and the upper case 14 and the lower case 16 are assembled to each other. For assembling the upper case 14 and the lower case 16, a conventionally known structure can be appropriately employed. Although illustration is omitted, for example, locking claws are integrally formed and assembled to each other by engagement of the locking claws. More preferably, in order to effectively exhibit the effect of supporting the pin terminal 52 and the tab terminal 54 by the pressing protrusion 74 of the upper case 14 to be described later, they are assembled with being screwed together. As a result, the printed circuit board laminate 12 is accommodated in a case 18 constituted by the upper case 14 and the lower case 16.

  Although not shown in the drawings since it is known in the art, when the upper case 14 is overlapped, the connection portions 58 and 64 of the pin terminal 52 and the tab terminal 54 are connected to the connector through the terminal insertion holes 72 a and 72 b of the upper case 14. It protrudes outward of the upper case 14 in the accommodating wall portions 71a and 71b of the attachment portions 70a and 70b. Similarly, the press contact blades 44, 44 of the fuse terminal 34 protrude outside the upper case 14.

  As shown in FIG. 2, when the upper case 14 is overlapped, the protruding wall portions 76 and 76 of the pair of pressing protrusions 74 formed on the connector mounting portions 70 a and 70 b are connected to the connector base 30. The pedestal block 50 is positioned on both sides of the pedestal block 50 in the width direction. At the same time, although not apparent from the drawings, the fitting protrusions 78a and 78b protruding from the protruding wall portion 76 are fitted into the fitting grooves 56a and 56b of the base block 50, respectively. Thus, the protruding wall portion 76 and the fitting protrusions 78a and 78b are brought into contact with the bent portions 62 and 68 of the pin terminal 52 and the tab terminal 54 from the upper case 14 side (upper side in FIG. 2). As a result, the bent portions 62 and 68 of the pin terminal 52 and the tab terminal 54 are inserted into and removed from the mating connector (not shown) by the groove bottom surface 40 of the fitting grooves 56a and 56b, the protruding wall portion 76 and the fitting projections 78a and 78b. In FIG. 2, it is sandwiched from both sides in the vertical direction).

  According to the electrical junction box 10 having such a structure, in the connector base 30, the pin terminal 52 and the tab terminal 54 are supported by the groove bottom surfaces 40 of the fitting grooves 56a and 56b formed in the base block 50. In addition, the pedestal block 50 is supported by the support surfaces 82 and 82 of the lower case 16. Thus, when a mating connector (not shown) is connected to the pin terminal 52 and the tab terminal 54 and a pushing force is exerted, the pedestal block 50 is supported by the lower case 16, whereby the first printed circuit board 20. The transmission of the pushing force is prevented. As a result, deformation of the first printed circuit board 20 can be suppressed, and cracks in the soldering portion of the connection terminal 24 provided between the pin terminal 52 and the tab terminal 54 and the second printed circuit board 22 can be prevented. Generation can be suppressed. Similarly, when a fuse (not shown) is connected to the fuse terminal 34 for the fuse base 28, the deformation of the first printed circuit board 20 can be suppressed by supporting the base block 32 with the lower case 16. I can do it.

  Particularly in the present embodiment, the substantially central portions of the pedestal blocks 32 and 50 in the longitudinal direction are supported via the first printed circuit board 20 by the support protrusions 90 and 90 protruding from the lower case 16. Thereby, the bending deformation of the base blocks 32 and 50 at the time of connection of a connector or a fuse is prevented more effectively. Further, the reinforcing blocks 36 and 36 are formed at both ends in the width direction of the pedestal blocks 32 and 50, so that the strength of the pedestal blocks 32 and 50 is improved. In particular, the portions where the fitting grooves 56a and 56b are formed. Since the thickness of the connector is increased in the insertion / removal direction of the connector, the support strength of the pin terminal 52 and the tab terminal 54 can be further improved.

  In order to prevent deformation of the first printed circuit board 20 when connecting external electric components, an insulating member is disposed between the opposing surfaces 96a and 96b of the first printed circuit board 20 and the second printed circuit board 22. Therefore, the manufacturing cost can be reduced by reducing the number of parts and the resin material, and the opposing surfaces 96a and 96b can be used more effectively. Furthermore, solder cracks caused by thermal deformation of the insulating member interposed between the first printed circuit board 20 and the second printed circuit board 22 can be avoided. In addition, the first printed circuit board 20 and the second printed circuit board 22 can be placed closer together, and the electrical connection box 10 can be downsized.

  On the other hand, when the connector is removed, the pin terminal 52 and the tab terminal 54 are pressed from the upper case 14 side by the pressing protrusion 74 protruding from the upper case 14. Accordingly, the pin terminal 52 and the tab terminal 54 can be prevented from being lifted from the first printed circuit board 20, and the deformation of the first printed circuit board 20 can be suppressed even when the connector is removed. It is possible to suppress the occurrence of cracks in the terminal 54 and the soldered portion of the connection terminal 24. Although not shown, the same applies to the fuse pedestal 28, and the deformation of the first printed circuit board 20 can be suppressed by pressing the fuse terminal 34 with a protrusion protruding from the upper case 14.

  Further, since the fuse terminal 34, the pin terminal 52 and the tab terminal 54 are fitted into the fitting grooves 38, 56a and 56b of the pedestal blocks 32 and 50 and assembled to the pedestal blocks 32 and 50, compared with press fitting or the like. Can be assembled easily. The fuse terminal 34, the pin terminal 52, and the tab terminal 54 are all crank-shaped. As a result, the insertion portions 46, 60, 66 of the terminals 34, 52, 54 are separated from the side of the pedestal blocks 30, 50 and are inserted into the through holes 26a and soldered. The visibility of rising can be improved.

  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 specific shape of the pedestal block is not limited to the shape as in the above embodiment, but a pair of reinforcing ribs formed on the upper surface (upper in FIG. 5) of the pedestal block 32 of the fuse pedestal 28. The space between 36 and 36 may be made larger, and a conductive path such as a bus bar may be arranged between the reinforcing ribs 36 and 36. In this way, it is possible to arrange the conductive path efficiently in space, and it becomes unnecessary to use an insulating member separately.

  Further, the pedestal block is not necessarily limited to the one that extends in a straight line, and may be bent between both ends in consideration of the circuit shape on the first printed board, the arrangement position of the electrical components, and the like.

  Furthermore, in the above-described embodiment, the support protrusions 90 and 90 that protrude from the lower case 16 toward the first printed circuit board 20 and the insertion holes 92 of the second printed circuit board 22 through which the support protrusions 90 and 90 are inserted. , 92 is not necessarily required. If the insertion holes 92, 92 are not formed, a larger effective space of the second printed circuit board 22 can be secured.

10: Electrical connection box, 12: Printed circuit board laminate, 18: Case, 20: First printed circuit board, 22: Second printed circuit board, 24: Connection terminal, 27: Surface, 28: Fuse base, 30: Connector Pedestal, 32, 50: Pedestal block, 34: Fuse terminal (substrate terminal), 36: Reinforcing rib, 38, 56a, 56b: Fitting groove, 41a, b: End portion, 42: Positioning protrusion (positioning portion), 48, 62, 68: bent portion, 52: pin terminal (substrate terminal), 54: tab terminal (substrate terminal), 67: notch (positioning portion), 74: pressing projection, 80: support portion

Claims (4)

The conductive paths of the plurality of printed circuit boards arranged in a stacked manner with a gap between them are connected to each other by connection terminals, and a substrate terminal connected to an external electrical component is projected on the surface of the printed circuit board. In the electrical junction box in which the printed circuit board laminate is accommodated in the case,
A synthetic resin pedestal block that is placed on the surface of the printed circuit board and supports the substrate terminals is formed in an elongated shape, and both ends of the pedestal block protrude from the peripheral edge of the printed circuit board and While being supported by a support portion provided in the case, the board terminal has a crank-shaped bent portion, and the bent portion is fitted and supported in a fitting groove formed in the pedestal block. An electrical junction box characterized by that.   The electrical junction box according to claim 1, wherein the pedestal block has a rectangular rod shape, and reinforcing ribs project from both side edges in the width direction.   The electrical connection box according to claim 1, wherein the printed circuit board and the pedestal block are provided with positioning portions that engage with each other to position the pedestal block on the printed circuit board.   The pressing case which contacts the said bending part of the said terminal for board | substrates inserted in the said fitting groove from the opposite side to the said pedestal block is formed in the said case. The electrical junction box described in the section.

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