JP2006325366A - Electrical connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a box having high density electrical connection that controls conduction/interruption of electronic autoparts. <P>SOLUTION: A circuit structure 11 where substrate side bus bars 21 are arranged on a circuit board 20, a bus bar support 36 held on the circuit structure 11, while being spaced apart specifically by a support leg 30, and a support side bus bar 34 secured to the bus bar support 36 by inserting a part of the support side bus bar 34 into a bus bar insertion hole 37 formed in the bus bar support 36 are arranged in the casing 12 of the electrical connection box 10. Consequently, the support side bus bar 34 can be extended in the electrical connection box 10, without having to extend the substrate-side bus bars 21 arranged on the circuit board 20, and a higher density electrical connection box 10 can be obtained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electrical junction box including a circuit structure.

2. Description of the Related Art Conventionally, as an electrical connection box for controlling on-off switching of in-vehicle electrical components, the one described in Patent Document 1 is known. In this case, an electronic component is mounted on one surface of a circuit board, and a circuit structure formed by arranging a power circuit formed by a bus bar on the other surface of the circuit board is accommodated in a casing. .
JP 2003-164039 A

  In recent years, the number of in-vehicle electrical components tends to increase from the viewpoint of improving vehicle safety and passenger comfort. Along with this, the number of power circuits connected to these in-vehicle electrical components also tends to increase. However, if a bus bar is simply added in the electrical connection box according to the conventional configuration, the circuit structure in which the bus bar is disposed becomes larger, and the electrical connection box that accommodates the circuit structure becomes larger. There is a problem. For this reason, higher density of the electrical junction box is required.

  The present invention has been completed based on the above circumstances, and an object thereof is to provide an electric junction box having a high density.

  As means for achieving the above object, an electrical junction box according to the invention of claim 1 is a circuit structure in which a circuit board mounted with electronic components is disposed along a board-side bus bar, and this circuit structure. A bus bar support that is held on the body in a state of being spaced apart by a spacing member, and a support-side bus bar that is fixed to the bus bar support by a holding portion formed on the bus bar support are disposed in the casing. It is characterized by becoming.

  According to a second aspect of the present invention, in the first aspect, the holding portion includes a bus bar insertion hole formed in the bus bar support body, and a part of the support side bus bar passes through the bus bar insertion hole. It is characterized by being.

  According to a third aspect of the present invention, in the first aspect of the present invention, the holding portion includes: a pin integrally protruding from the bus bar support; and a bus bar pressing portion formed by melting and crushing a tip of the pin. It is characterized by becoming.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the holding portion is provided on the bus bar support body and accommodates the support-side bus bar individually, and the support in the bus bar storage groove. From the bus bar holding part that protrudes inward of the bus bar receiving groove from the opening edge of the groove wall of the bus bar receiving groove and holds the casing side bus bar against the bottom wall of the bus bar receiving groove in a state where the body side bus bar is stored It is characterized by becoming.

  According to a fifth aspect of the present invention, in the first or fourth aspect of the present invention, the spacing member is constituted by a support leg that extends from the bus bar support toward the circuit component, and the support leg is the A part of the board-side bus bar is sandwiched between the inner surface of the casing or the circuit board.

  According to a sixth aspect of the present invention, in the first or fourth aspect of the present invention, the spacing member is a support leg extending from the bus bar support toward the circuit component side, and an end of the support leg. And a frame portion that forms a frame shape surrounding the circuit board. The frame portion can be fixed to the casing, and the frame portion is fixed to the casing inside the frame portion. In this state, a sealing material filled so as to cover the circuit board is disposed.

<Invention of Claim 1>
According to the first aspect of the present invention, the support-side bus bar can be added to the electrical connection box without providing the board-side bus bar provided on the circuit board by providing the support-side bus bar on the bus bar support. This can increase the density of the electrical junction box.

  According to the invention of claim 1, since the support-side bus bar is fixed to the bus bar support by the holding portion formed on the bus bar support, for example, attachment for attaching the support-side bus bar to the bus bar support The number of parts can be reduced as compared with the case where the working member is configured as a separate part from the bus bar support.

<Invention of Claim 2>
According to the invention of claim 2, the operator can fix the support-side bus bar at a predetermined position of the bus bar support by passing a part of the support-side bus bar through the bus bar insertion hole. As a result, even when the operator gives vibration to the bus bar support during the assembly work of the support side bus bar to the bus bar support, it is possible to prevent the support side bus bar from coming out of the predetermined position and becoming loose. Thereby, the efficiency of the assembly | attachment operation | work of a support body side bus-bar can be improved.

<Invention of Claim 3>
According to the invention of claim 3, the support-side bus bar is fixed to the bus bar support by the holding portion including the pin integrally protruding from the bus bar support and the bus bar pressing portion provided at the tip of the pin. Since the bus bar pressing part is formed by a simple method of melting and crushing the tip of the pin, the work of assembling the support side bus bar to the bus bar support can be simplified.

<Invention of Claim 4>
According to the fourth aspect of the present invention, when the supporter-side busbar is disposed on the busbar support body, the operator can perform work by using the groove wall of the busbar housing groove as a guide. The work efficiency can be improved.

<Invention of Claim 5>
In an electric junction box mounted on a vehicle, there is a concern that the vibration of the vehicle is transmitted to the board-side bus bar and the board-side bus bar and the circuit board are relatively displaced, and as a result, the board-side bus bar is peeled off from the circuit board.

  According to the invention of claim 5, since the support leg sandwiches a part of the board-side bus bar between the inner surface of the casing or the circuit board, even if the board-side bus bar vibrates, the support leg Vibration is suppressed at the sandwiched portion. For this reason, since it can prevent that a circuit board and a board | substrate side bus bar displace relatively, it can prevent that a board | substrate side bus bar peels from a circuit board.

  Furthermore, since a part of the board-side bus bar is sandwiched by an interval holding member that originally holds the distance between the support-side bus bars, compared to a case where parts for sandwiching the board-side bus bar are separately provided. The number of parts can be reduced.

<Invention of Claim 6>
Conventionally, in order to improve the waterproofness and insulation of the electrical junction box, so-called potting is sometimes performed in which a liquid sealing material is filled so as to cover the circuit board and then cured. In this potting, for example, a frame may be arranged so as to surround the periphery of the circuit board, and a liquid sealing material may be filled in the frame.

  According to the invention of claim 6, the frame portion formed integrally with the support leg portion of the bus bar support body has a frame shape surrounding the periphery of the circuit board and is fixed to the casing inside the frame portion. In this state, a sealing material filled so as to cover the circuit board is disposed. In this way, the bus bar support for fixing the support-side bus bar also serves as a frame for filling the sealing material, thereby improving the waterproofness and insulation of the electrical junction box and reducing the number of parts. it can.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIG. The present embodiment is an electric junction box 10 for a vehicle, and a circuit structure 11 is accommodated in a casing 12. The casing 12 includes a heat dissipation plate 13, a frame body 14 attached to the upper surface of the heat dissipation plate 13, a fuse block 31 assembled to the frame body 14, a connector block 38 assembled to the frame body 14, and an upper side of the frame body 14. And a cover 15 attached so as to close the opening.

  The heat sink 13 is bonded to the lower surface of the circuit structure 11 with an insulating adhesive 41. The heat radiating plate 13 is made of metal and dissipates heat generated from the circuit structure 11 to the outside of the electrical junction box 10. In the heat radiating plate 13, a bracket 16 is formed at the right end in FIG. 1 so as to extend obliquely downward to the right and attach the electrical junction box 10 to a vehicle (not shown).

  The frame body 14 is bonded to the upper surface of the heat radiating plate 13 with an adhesive (not shown) and is screwed from the lower surface side of the heat radiating plate 13. The frame body 14 has an open top and bottom shape and surrounds the periphery of the circuit structure 11. A bracket cover 17 extending obliquely downward to the right along the bracket 16 is formed at the right end in FIG. 1 on the frame body 14 so as to cover the bracket 16 from above.

  At a position near the right end of the bracket 16, a bolt hole 18 that penetrates the bracket 16 up and down is provided. A through hole 19 is provided at a position near the right end of the bracket cover 17 at a position corresponding to the bolt hole 18 of the bracket 16. By inserting bolts (not shown) into the bolt holes 18 and the through holes 19 and screwing them to the vehicle, the electrical junction box 10 is attached to the vehicle so that the circuit components 11 are arranged vertically.

  The circuit structure 11 includes a circuit board 20, a plurality of board-side bus bars 21 that are routed along the lower surface of the circuit board 20 and bonded to the circuit board 20 with an adhesive sheet (not shown), 20 and an electronic component such as a relay 22 mounted on the upper surface side.

  The right end in FIG. 1 of the board-side bus bar 21 protrudes to the right from the circuit board 20 and is bent to the right by being bent at a plurality of times on the upper surface side of the circuit board 20 and connected to a fuse 23 described later. The fuse terminal 24 is used. Further, the left end of the board-side bus bar 21 in FIG. 1 protrudes leftward from the circuit board 20 and is bent a plurality of times at a right angle on the upper surface side of the circuit board 20 and protrudes to the left. The male terminal 27 is connected to the connector 26.

  The inner portion of the upper surface of the frame body 14 is formed one step lower than the outer portion, and serves as a bus bar mounting portion 29 for mounting a part of the substrate-side bus bar 21. Of the left and right end portions of the board-side bus bar 21, a portion that is bent at a right angle and extends in a direction along the circuit board 20 is placed on the bus bar mounting portion 29. The portion of the board-side bus bar 21 that is mounted on the bus bar mounting portion 29 is between the upper surface of the bus bar mounting portion 29 and the lower end edge of a support leg 30 (corresponding to the spacing member of the present invention) described later. Is sandwiched between.

  A fuse block 31 is mounted above the frame body 14 at a position near the right end of the frame body 14, and the fuse block 31 is provided with a fuse mounting portion 25 that opens to the right. The fuse mounting portion 25 is provided with a fuse terminal 24 with one end protruding into the opening and the other end penetrating the back wall. The fuse terminal 24 is held in the fuse mounting portion 25 by the locking portion 32 formed in the fuse mounting portion 25 being locked in the engagement hole 33 formed in the fuse terminal 24. The fuse terminals 24 are mounted in two rows on the back wall of the fuse mounting portion 25, and the fuse terminals 24 of the board-side bus bar 21 are disposed on the lower side and are described later on the upper side. A fuse terminal 24 on the support side bus bar 34 side is arranged. Both fuse terminals 24, 24 are connected by a fuse 23. The left end of the upper wall of the fuse block 31 is extended to the left to form an extension wall 35. The extension wall 35 is a bus bar insertion hole (described later) formed in a bus bar support 36 (described later). In 37 (corresponding to the holding portion of the present invention), the upper side of the right bus bar insertion hole 37 is covered.

  At a position near the left end of the frame body 14, a connector block 38 is disposed above the frame body 14. The connector block 38 includes a connector hood 28 that opens to the left. The male terminal 27 is arranged with one end protruding into the opening and the other end penetrating the back wall. The male terminals 27 are mounted on the back wall of the connector hood 28 in two upper and lower stages. The male terminals 27 of the board-side bus bar 21 are arranged on the lower side, and the support side is on the upper side. A male terminal 27 on the bus bar 34 side is provided. The mating connector 26 is fitted to the connector hood 28, and the vehicle-mounted electrical component (not shown) and the male terminal 27 are connected by a wire harness (not shown). The mating connector 26 connects a predetermined one of the male terminals 27 of the board-side bus bar 21 and a predetermined one of the male terminals 27 of the support-side bus bar 34. An extension wall 35 extending rightward from the vicinity of the center in the vertical direction is formed on the right outer surface of the rear wall of the connector block 38, and this extension wall 35 is a bus bar formed on the bus bar support 36. Of the insertion hole 37, the upper part of the left bus bar insertion hole 37 is covered.

  A plate-like cover 15 is assembled from above on the upper surfaces of both the extending walls 35, 35. Both left and right end portions of the cover 15 protrude downward and serve as fitting edge portions 40 that fit into groove portions 39 formed on the upper surfaces of the extension walls 35 and 35.

  A bus bar support 36 is held above the circuit structure 11 with a predetermined distance from the circuit structure 11. The bus bar support 36 has a plate shape, and bus bar insertion holes 37 that penetrate the bus bar support 36 vertically are formed at positions near the left and right ends. At both left and right ends of the bus bar support 36, support legs 30 extending downward, that is, toward the circuit component 11, are formed.

  The support leg 30 is placed above the board-side bus bar 21 placed on the bus bar placement part 29 of the frame body 14. As described above, a part of the board-side bus bar 21 is sandwiched between the lower end edge of the support leg 30 and the bus bar mounting part 29 of the frame body 14. Further, the support leg 30 allows the bus bar support 36 to be supported at a predetermined interval so that an electronic component such as the relay 22 can be accommodated in the space between the circuit board 20 and the bus bar support 36. 36 is held.

  On the lower surface of the bus bar support 36, a support side bus bar 34 is arranged along the lower surface of the bus bar support 36. The left and right ends of the support-side bus bar 34 are bent in a crank shape so as to bend toward the upper surface side of the bus bar support 36, and intersect the plate surface of the bus bar support 36 in the bent portion. The portion facing the direction passes through the bus bar insertion hole 37, so that the support-side bus bar 34 is held at a predetermined position of the bus bar support 36. The front end portion of the support side bus bar 34 extends in a direction along the plate surface of the bus bar support 36 and protrudes outward from the left and right end edges of the bus bar support 36. The right end of the support-side bus bar 34 protrudes into the fuse mounting portion 25 and serves as a fuse terminal 24. Further, the left end of the support-side bus bar 34 protrudes into the connector block 38 and serves as a male terminal 27.

Then, the effect | action and effect of this embodiment are demonstrated.
The board-side bus bar 21 is bonded to the lower surface of the circuit board 20 with an adhesive sheet, and then an electronic component such as a relay 22 is mounted on the upper surface of the circuit board 20 to form the circuit structure 11. Next, after the frame body 14 is bonded to the upper surface of the heat radiating plate 13 with an adhesive and screwed, the circuit component body 11 is accommodated in the opening of the frame body 14 from above the frame body 14. And the upper surface of the heat sink 13 are bonded with an adhesive 41. At this time, a part of the substrate-side bus bar 21 is disposed so as to be placed on the bus bar placement portion 29 of the frame body 14.

  On the other hand, the support-side bus bar 34 is formed into a predetermined shape by pressing a metal plate, and both end portions thereof are bent in a direction perpendicular to the plate surface of the support-side bus bar 34, and are substantially U-shaped when viewed from the side. To form. Subsequently, the end portion of each support body side bus bar 34 is inserted into each bus bar insertion hole 37, and each bus bar support body 36 is penetrated. Accordingly, the support-side bus bar 34 can be held in a predetermined position on the bus bar support 36. As a result, even if vibration is applied during the work, it is possible to prevent the support-side bus bar 34 from being separated from the predetermined position and falling apart. Thereby, the assembly workability | operativity of the support body side bus-bar 34 can be improved.

  When all the support-side bus bars 34 are arranged, the end of the support-side bus bar 34 is bent at a right angle in the direction along the plate surface of the bus bar support 36 and outward of the bus bar support 36. In this manner, the support-side bus bar 34 is assembled to the bus bar support 36.

  What fixed the support body side bus-bar 34 to the bus-bar support body 36 as mentioned above is assembled | attached from the upper direction of what assembled the circuit structure 11, the frame 14, and the heat sink 13. As shown in FIG. At this time, a part of the board-side bus bar 21 is sandwiched between the lower end edge of the support leg 30 of the bus bar support 36 and the bus bar mounting part 29 of the frame 14.

  Thereafter, the connector block 19 and the fuse block 20 are assembled to the frame body 14, and then the cover 15 is assembled from above, whereby the circuit board 20 and the relay 22 are covered and the electrical junction box 10 is assembled.

  As described above, according to this embodiment, in addition to the board-side bus bar 21 arranged on the circuit board 20, the support-side bus bar 34 is further arranged on the bus bar support 36 arranged in the casing 12. Can do. Thereby, the support body side bus bar 34 can be extended in the casing 12 without adding the board side bus bar 21. Since the board-side bus bar 21 is not added, the circuit board 20 does not need to be enlarged, and the casing 12 for housing the circuit structure 11 does not need to be enlarged. Thus, since the support body side bus bar 34 can be arrange | positioned, without enlarging the electrical junction box 10, the electrical junction box 10 can be densified.

  However, when the support-side bus bar 34 is disposed on the bus-bar support 36, if the bus-bar support 36 is subjected to vibrations or the like, the support-side bus bar 34 may come off from a predetermined position and become scattered. Concerned.

  In view of this point, in the present embodiment, by inserting the end of the support-side bus bar 34 into the bus bar insertion hole 37 and penetrating the bus bar support 36, the support-side bus bar is placed at a predetermined position of the bus bar support 36. 34 was held in a positioned state. Thereby, even if a vibration is given during the assembling work of the support body side bus bar 34, it is possible to prevent the support body side bus bar 34 from being separated from a predetermined position and falling apart. Thereby, the assembly workability | operativity of the support body side bus-bar 34 can be improved.

  Furthermore, according to this embodiment, the edge part of the board | substrate side bus bar 21 and the support body side bus bar 34 protrudes outward of the casing 12, and forms the fuse terminal 24 or the male terminal 27, and both terminals 24 and 27 are The fuse 23 or the mating connector 26 is electrically connected. As described above, since both bus bars 21 and 34 are connected to each other outside the casing 12, it is possible to secure a wider working space and improve workability compared to the case where the connection work is performed in the casing 12. Furthermore, since the two bus bars 21 and 34 are connected by the fuse 23 or the mating connector 26, the work process can be simplified as compared with the case where the two bus bars 21 and 34 are connected by soldering or welding.

  Further, in the electrical junction box 10 mounted on the vehicle as in the present embodiment, the vibration of the vehicle is transmitted to the board-side bus bar 21 and the board-side bus bar 21 and the circuit board 20 are relatively displaced. There is a concern that the board-side bus bar 21 may peel off.

  In view of this point, in the present embodiment, since a part of the board-side bus bar 21 is sandwiched between the lower end edge of the support leg 30 and the bus bar mounting part 29 of the frame body 14, Even if the bus bar 21 vibrates, the vibration is suppressed at the portion sandwiched between the support legs 30. For this reason, since it can prevent that the circuit board 20 and the board | substrate side bus bar 21 displace relatively, it can prevent that the board | substrate side bus bar 21 peels from the circuit board 20. FIG.

  In addition, since the board-side bus bar 21 is sandwiched between the bus bar mounting part 29 of the frame body 14 by the support leg part 30 for maintaining the distance between the support-side bus bar 34 and the circuit board 20, The number of parts can be reduced as compared with the case where parts for sandwiching the board-side bus bar 21 are separately provided. Furthermore, the board-side bus bar 21 and the support-side bus bar 34 are connected to each other by a fuse 23 originally used for circuit protection, or a connector for originally connecting a circuit inside the electrical connection box 10 and a circuit outside the electrical connection box 10. Therefore, the number of parts of the electrical junction box 10 can be reduced. In addition, since the support-side bus bar 34 is fixed to the bus bar support 36 by a bus bar insertion hole 37 formed in the bus bar support 36, for example, an attachment member for attaching the support-side bus bar 34 to the bus bar support 36. However, the number of parts can be reduced as compared with the case where the parts are separated from the bus bar support 36.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIGS. The electrical junction box according to the present embodiment is configured by housing a circuit component 51 in a casing 52. The casing 52 includes a heat radiating plate 53 covering the lower side of the circuit component 51, a fuse block 54 attached to the heat radiating plate 53, and a cover 55 covering the upper side of the circuit component 51.

  The heat sink 53 is bonded to the lower surface of the circuit component 51 with an insulating adhesive (not shown). The heat radiating plate 53 is made of metal and dissipates heat generated from the circuit structure 51 to the outside of the electric junction box. In the heat radiating plate 53, a bracket 56 is formed at the right end in FIG. 5 and extends obliquely downward to the right, and for attaching an electric junction box to a vehicle (not shown).

  Above the bracket 56, a fuse block 54 to which a fuse (not shown) is attached is bonded with an adhesive (not shown). A bracket cover 57 that covers the upper portion of the bracket 56 is formed below the fuse block 54 so as to cover the bracket 56 from above.

  At a position near the right end of the bracket 56 in FIG. 5, a bolt hole 58 that penetrates the bracket 56 up and down is provided. The bracket cover 57 is provided with a through hole 59 at a position corresponding to the bolt hole 58 of the bracket 56. Bolts (not shown) are inserted into the bolt holes 58 and the through holes 59 and screwed to the vehicle, so that the electrical junction box is attached to the vehicle so that the circuit components 51 are arranged vertically.

  The circuit structure 51 includes a circuit board 60, a plurality of board-side bus bars 61 that are routed along the lower surface of the circuit board 60 and bonded together by an adhesive sheet (not shown), and the upper surface side of the circuit board 60. And an electronic component such as a relay 62 mounted on.

  The right end of the board-side bus bar 61 in FIG. 5 protrudes rightward from the circuit board 60, although not shown in detail. The board-side bus bar 61 located on the left front side in FIG. 2 is bent at a right angle a plurality of times on the upper surface side of the circuit board 60 and protrudes to the left in FIG. 5, and is connected to a battery (not shown). The input terminal 63 is used. Further, the end of the board-side bus bar 61 other than the input terminal 63 is bent at a right angle a plurality of times on the upper surface side of the circuit board 60 and protrudes rightward in FIG. 5, and a fuse terminal 64 for connecting to the fuse Is done. Further, the left end in FIG. 5 of the board-side bus bar 61 protrudes leftward from the circuit board 60 and is bent at a right angle a plurality of times on the upper surface side of the circuit board 60 and protrudes to the left. The male terminal 65 is used for connection with the connector.

  The fuse block 54 is provided with a fuse mounting portion 66 opened to the right front side in FIG. In the fuse mounting portion 66, a fuse terminal 64 is arranged with one end protruding into the opening and the other end penetrating the back wall. The fuse terminals 64 are mounted in two rows on the back wall of the fuse mounting portion 66. The fuse terminals 64 of the board-side bus bar 61 are disposed on the lower side, and are described later on the upper side. A fuse terminal 64 on the support side bus bar 67 side is disposed. Both fuse terminals 64, 64 are connected by a fuse (not shown).

  A connector block 69 is disposed on the upper left side in FIG. 4 above a frame portion 68 (corresponding to the interval holding member of the present invention), which will be described later. An open connector hood 70 is provided, and a male terminal 65 is disposed on the connector hood 70 with one end protruding into the opening and the other end penetrating the back wall. The male terminals 65 are mounted on the back wall of the connector hood 70 in two upper and lower rows, and the male terminals 65 of the board-side bus bar 61 are disposed on the lower side, and the support side is on the upper side. A male terminal 65 on the bus bar 67 side is provided. The connector hood 70 is fitted with a mating connector (not shown), and the vehicle-mounted electrical component (not shown) and the male terminal 65 are connected by a wire harness (not shown).

  Around the circuit board 60, a frame portion 68 having a frame shape with an open top and bottom is attached. The frame portion 68 is bonded to the upper surface of the heat dissipation plate 53 with an adhesive (not shown) and screwed. . The frame portion 68 surrounds the circuit board 60 without any breaks over the entire circumference, and the area surrounded by the frame portion 68 and the heat dissipation plate 53 is not shown so as to cover the circuit board 60. The sealing material is filled. Thereby, the insulation and waterproofness of an electrical junction box can be improved.

  As shown in FIG. 5, a lock protrusion 71 is provided on the outer surface of the frame portion 68, and the cover 55 is attached by engaging with a lock receiving portion 72 of the cover 55 described later.

  On the side wall of the cover 55, a lock receiving portion 72 is formed at a position corresponding to the lock protrusion 71 of the frame portion 68, and the lock protrusion 71 and the lock receiving portion 72 are elastically engaged with each other. 68 and the cover 55 are fixed.

  Now, a wall-like support leg portion 73 (corresponding to the spacing member of the present invention) extending upward is integrally extended at a position near the left and right ends in FIG. 5 of the frame portion 68. The upper end surface of the member 73 is a bus bar support 74 for holding the support side bus bar 67. Further, as shown in FIGS. 2 and 3, bridge-like support legs 73 are integrally formed around the left and right ends of the frame portion 68 in FIG. The upper end surface of the support leg 73 is a bus bar support 74.

  As shown in FIG. 3, each bus bar support 74 is provided with a support-side bus bar 67 at a predetermined position so as to bridge between the bus bar supports 74. The bus bar support 74 on the right end side in FIG. 5 is provided with a plurality of pins (corresponding to the holding portion of the present invention) 75 protruding upward and sandwiched between the pins 75. A support-side bus bar 67 is placed. The tip of the pin 75 is expanded in diameter by heating and melting, and is a bus bar pressing portion (corresponding to the holding portion of the present invention) 76 that presses and fixes the support side bus bar 67 to the bus bar support 74. The

  A plurality of groove walls 77 projecting upward are formed on the bus bar support body 74 near the center in the left-right direction in FIG. 5 and the bus bar support body 74 on the left end side, and the space between the groove walls 77 is A bus bar housing groove (corresponding to the holding portion of the present invention) 78 for housing the support-side bus bar 67 is provided. The support-side bus bar 67 is accommodated in the bus bar accommodating groove 78. At the open end edge of each groove wall 77, the pin 75 protruding upward from the upper end surface of the groove wall 77 is heated and melted and crushed to expand the diameter and protrude inward of the bus bar housing groove 78. A bus bar pressing portion 76 for pressing and fixing the support side bus bar 67 to the bottom wall of the bus bar receiving groove 78 is formed.

  The right end of the support-side bus bar 67 in FIG. 5 protrudes into the fuse mounting portion 66 and serves as a fuse terminal 64. The left end of the support-side bus bar 67 protrudes into the connector block 69 and serves as a male terminal 65.

Next, the operation and effect of the electrical junction box will be described.
To assemble the electrical junction box, first, the board-side bus bar 61 is bonded to the lower surface of the circuit board 60 with an adhesive sheet (not shown), and then the lower surface of the circuit component 51 and the upper surface of the heat dissipation plate 53 are bonded together. Adhere with an adhesive (not shown). Thereafter, electronic components such as a relay 62 are mounted on the circuit board 60, whereby the circuit structure 51 is generally assembled.

  Next, the support-side bus bar 67 is formed into a predetermined shape by pressing the metal plate. On the other hand, the bus bar support 74, the support leg 73, and the frame 68 are integrally formed by injection molding synthetic resin. A pin 75 projecting upward is formed on the upper surface of the bus bar support 74 on the right end side in FIG. 5, and a groove projecting upward on the upper surface of the bus bar support body 74 near the center in the left-right direction and on the left end side in FIG. A bus bar housing groove 78 is formed by the wall 77, and a pin 75 protruding upward is formed on the upper surface of the groove wall 77. Subsequently, the support body side bus bar 67 is arranged at a predetermined position of the bus bar support body 74. That is, the bus bar support body 74 on the right end side in FIG. 5 is placed so that the support body side bus bar 67 is sandwiched between the pins 75, and the bus bar support body 74 on the left end side near the center in the left-right direction in FIG. The support-side bus bar 67 is accommodated in the bus bar accommodating groove 78.

  When all of the support-side bus bars 67 are arranged, the tips of the pins 75 are melted by heat and pressed and crushed to expand the diameter, thereby forming the bus bar pressing portion 76. Thereby, the support body side bus bar 67 can be fixed to the bus bar support body 74.

  Then, after fixing what attached the support body side bus bar 67 to the bus bar support body 74 from above with the adhesive (not shown) with respect to the heat sink 53, the fuse block 54 is approached from the right side in FIG. Assemble it. As a result, the fuse terminals 64 of the board-side bus bar 61 and the fuse terminals 64 of the support-side bus bar 67 are passed through the back wall of the fuse mounting part 66, and the fuse terminals 64 are arranged in the fuse mounting part 66. When the fuse block 54 is assembled, the fuse block 54 and the heat dissipation plate 53 are fixed by an adhesive (not shown), and the frame 68 and the fuse block 54 are fixed by an adhesive (not shown). .

  In this way, the frame portion 68 that surrounds the circuit board 60 over the entire circumference is configured, and the heat sink 53 that covers the circuit board 60 and the board-side bus bar 61 from the lower surface side is fixed to the frame portion 68. A sealing material (not shown) is injected into a recess formed by the portion 68 and the heat dissipation plate 53. The sealing material includes an area excluding the fuse terminal 64 and the male terminal 65 in the board-side bus bar 61 (that is, an area arranged along the lower surface of the circuit board 60), the entire circuit board 60, and the circuit. The contact portion of the substrate 60 with the relay 62 is covered, thereby preventing water from entering the conductive portion of the circuit substrate 60, the bus bar, and the relay 62 and interference of foreign matter.

  Thereafter, the connector housing is assembled to the frame portion 68 from the right side in FIG. 5, and the male terminal 65 of the board-side bus bar 61 and the male terminal 65 of the support-side bus bar 67 are passed through the back wall of the connector hood 70. Each male terminal 65 is disposed in the connector hood 70.

  Finally, the cover 55 is assembled to the frame portion 68 from the upper surface side, and is locked in the assembled state by locking the lock projection 71 and the lock receiving portion 72, and the cover 55 and the frame portion 68 are fixed by screws (not shown). To fix. With this cover 55, the electronic components such as the circuit board 60 and the relay 62 are covered and assembled, and the electrical junction box is assembled.

  As described above, according to the present embodiment, the support-side bus bar 67 is disposed between the pins 75 formed in the bus bar support 74 or in the bus bar receiving groove 78, and is The support 74 is fixed. Since the bus bar pressing portion 76 is formed by a simple method of melting and crushing the tip of the pin 75, the assembling work of the support side bus bar 67 to the bus bar support 74 can be simplified.

  In addition, when the supporter-side busbar 67 is disposed on the busbar supporter 74, the operator can perform work by using the groove wall 77 of the busbar housing groove 78 as a guide. Efficiency can be improved.

  Further, the frame portion 68 formed integrally with the support leg portion 73 of the bus bar support body 74 has a frame shape surrounding the periphery of the circuit board 60, and is fixed to the casing 12 inside the frame portion 68. A sealing material filled so as to cover the circuit board 60 in a state is disposed. As described above, the bus bar support 74 for fixing the support-side bus bar 67 also serves as the frame portion 68 for filling the sealing material. The score can be reduced.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  (1) In the first embodiment, the board-side bus bar 21 is sandwiched between the lower end edge of the support leg 30 and the bus bar mounting part 29 of the frame body 14. The board-side bus bar 21 may be disposed on the upper surface of the board 20, and a part of the board-side bus bar 21 may be sandwiched between the upper face of the circuit board 20 and the lower end edge of the support leg 30.

  (2) In the first embodiment, the support-side bus bar 34 is arranged along the lower surface side of the bus bar support 36, and both ends of the support-side bus bar 34 penetrate the upper surface side of the bus bar support 36. However, the present invention is not limited to this, and the support-side bus bar 34 may be arranged along the upper surface side of the bus bar support 36 so that both ends of the support-side bus bar 34 penetrate the lower surface side of the bus bar support 36. Moreover, it is good also as a structure arrange | positioned so that the support body side bus-bar 34 may extend along both the upper surface side and lower surface side of the bus-bar support body 36. FIG.

  (3) According to the present embodiment, the support-side bus bar and the board-side bus bar are configured to connect the protruding ends of the both bus bars from the circuit board by the fuse and the mating connector, but are not limited thereto. For example, the protruding ends of both bus bars from the circuit board may be connected by a short-circuit terminal or a jumper wire, or the protruding ends of both bus bars from the circuit board may be connected by soldering, welding or brazing. It can be connected by any means.

  (4) In this embodiment, a relay is used as an electronic component. However, the present invention is not limited to this, and a semiconductor relay may be used.

  (5) In the second embodiment, the bus bar support 74 on the right end side in FIG. 5 is provided with a pin 75 and a bus bar pressing portion 76 formed at the tip of the pin 75, and in the vicinity of the center in FIG. The bus bar support 74 on the left end side is provided with a bus bar receiving groove 78 and a bus bar pressing part 76 protruding inward from the opening edge of the groove wall 77, but the present invention is not limited to this. It is good also as a structure which forms the bus-bar holding | suppressing part 76 formed in 74 at the front-end | tip of the pin 75 and the pin 75 in 74, and it is inward from the opening edge of the bus-bar accommodation groove | channel 78 and the groove wall 77 in all the bus-bar support bodies 74. It is good also as a structure which forms the bus-bar holding | suppressing part 76 which protrudes in this.

  (6) In the first embodiment, the support leg 30 of the bus bar support 36 is configured to press the board-side bus bar 21 between the casing 12 but is not limited thereto, and is integrally formed with the end of the support leg. It is good also as a structure which forms the frame part 68, fixes the frame part 68 to the heat sink 53, and fills the sealing material in this frame part 68. FIG.

  (7) In the second embodiment, the frame portion 68 is integrally formed at the end portion of the support leg portion 73 of the bus bar support 74, and the sealing material is filled in the frame portion 68. However, the present invention is not limited to this. The support leg 73 may be configured to press the board-side bus bar 61 between the casing 12 and the support leg 73.

  (8) The frame portion 68 may have a configuration that surrounds the circuit board 60 by combining a plurality of components.

Sectional drawing of the electrical-connection box which concerns on Embodiment 1 of this invention The electrical connection box which concerns on Embodiment 2 in this invention WHEREIN: The perspective view showing the state before assembling a fuse block, a cover, and a connector block Similarly, in the electrical junction box according to the second embodiment, a plan view showing a state before the fuse block, the cover, and the connector block are assembled. Similarly, in the electrical junction box according to the second embodiment, a perspective view showing a state before the cover is assembled. Similarly, in the electrical junction box according to the second embodiment, a side view showing a state before the fuse block, the cover, and the connector block are assembled.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Electric junction box 11, 51 ... Circuit structure 12, 52 ... Casing 13, 53 ... Heat sink 14 ... Frame 15, 55 ... Cover 20, 60 ... Circuit board 21, 61 ... Board side bus bar 22, 62 ... Relay (Electronic parts)
30, 73 ... support leg (spacer holding member)
34, 67 ... support side bus bar 36 ... bus bar support 37 ... bus bar insertion hole (holding part)
68 .. Frame portion (space holding member)
75 ... pin (holding part)
76 ... Bus bar holding part (holding part)
77 ... groove wall 78 ... bus bar housing groove (holding part)

Claims (6)

A circuit structure formed by arranging a board-side bus bar along a circuit board on which an electronic component is mounted, a bus bar support held by the circuit structure at a predetermined interval by a distance holding member, and An electrical junction box in which a support-side bus bar fixed to a bus bar support by a holding portion formed on the bus bar support is arranged in a casing. The holding portion comprises a bus bar insertion hole formed in the bus bar support,
The electrical junction box according to claim 1, wherein a part of the support side bus bar passes through the bus bar insertion hole. 2. The electrical junction box according to claim 1, wherein the holding portion includes a pin integrally protruding from the bus bar support and a bus bar pressing portion formed by melting and crushing a tip of the pin. The holding portion is provided on the bus bar support body to individually receive the support side bus bars, and in the state where the support side bus bars are stored in the bus bar storage grooves, 2. The electrical junction box according to claim 1, further comprising a bus bar pressing portion that protrudes inward of the bus bar receiving groove from an opening edge and presses the casing side bus bar against a bottom wall of the bus bar receiving groove. The spacing member is constituted by a support leg extending from the bus bar support toward the circuit component side, and the support leg extends between a part of the board-side bus bar and the inner surface of the casing or the circuit board. The electrical junction box according to claim 1 or 4, wherein the electrical junction box is sandwiched. The spacing member includes a support leg portion extending from the bus bar support body toward the circuit component side, and a frame portion formed integrally with an end portion of the support leg portion and surrounding the periphery of the circuit board. And consist of
The frame portion can be fixed to the casing, and a sealing material filled so as to cover the circuit board in a state where the frame portion is fixed to the casing is disposed inside the frame portion. The electrical junction box according to claim 1, wherein the electrical junction box is characterized.

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