JP2006006069A - Electrical connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the cost of an electrical connection box comprising a plurality of circuit boards connected by joint bus bars. <P>SOLUTION: In the electrical connection box that comprises a plurality of the circuit boards 1A, 1B, 1C connected by the joint bus bars 4, the joint bus bars 4, 4 are insulated by inserting an insulating sheet 6 (or resin-dipping coating formed on the surfaces of the bus bars) between the joint bus bars 4, 4. Also, at least one joint bus bar of a plurality of the joint bus bars 4 is formed so that three pieces of the circuit boards 1A, 1B, 1C can be connected collectively. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric junction box for automobiles.

  An electrical junction box in which a plurality of circuit boards on which components are mounted is stored in a case in a vertical position is known, for example, from the cited document 1 or the like. In such an electrical junction box, when a plurality of circuit boards are electrically connected, as shown in FIG. 4, a connection terminal (such as a tuning tuning fork terminal) 2 is attached to each circuit board 1A, 1B. The connection terminals 2 and 2 are connected by a plurality of joint bus bars 4. The plurality of joint bus bars 4 are insulated and integrated by a resin mold 5. In FIG. 4, reference numeral 3 denotes a terminal holder that holds the connection terminal 2.

JP 2000-224736 A

  In this type of conventional electrical junction box, since a plurality of joint bus bars are insulated by a resin mold, there is a problem that a large amount of money is required to manufacture the mold and the cost is high. Further, although the number of circuit boards increases or decreases depending on the vehicle type, there is a problem that the cost increases because the mold is remanufactured each time.

  An object of the present invention is to reduce the cost of an electrical junction box having a plurality of circuit boards connected by joint bus bars.

  In order to achieve this object, the present invention provides an electrical junction box having a plurality of circuit boards connected by joint bus bars, wherein insulation between joint bus bars is formed on an insulating sheet or joint bus bar surface interposed between joint bus bars. The resin dipping coating is performed, and at least one of the joint bus bars is formed so that three or more circuit boards can be connected.

  According to the present invention, since the insulation of the plurality of joint bus bars connecting the circuit boards is performed with the insulating sheet or the resin dipping coating, it is possible to reduce the cost of mold production. In addition, since at least one of the joint bus bars is formed so that three or more circuit boards can be connected, the number of joint bus bars can be reduced and the number of circuit boards can be flexibly accommodated. Therefore, the cost of the electrical junction box having a plurality of circuit boards connected by the joint bus bar can be reduced.

Embodiment 1 FIG. 1 shows an embodiment of an electrical junction box according to the present invention. In the figure, 1A, 1B, 1C are metal core circuit boards (not shown) mounted in a case (not shown), and 2 are connections attached to the circuit boards 1A-1C. Terminals 3 and 3 are terminal holders for holding intermediate portions of the connection terminals 2, and 4 is a plurality of joint bus bars for connecting the connection terminals 2 of the circuit boards 1A to 1C. The first and second circuit boards 1A and 1B are circuit boards common to all vehicle types, and the third circuit board 1C is an optional circuit board.

  The plurality of joint bus bars 4 are insulated by an insulating sheet 6 interposed therebetween. It is preferable to fix the relative positions of the plurality of joint bus bars 4 by providing an adhesive layer on both surfaces of the insulating sheet 6.

  In this embodiment, one of the plurality of joint bus bars 4 is formed so that the connection terminals 2 of the three circuit boards 1A to 1C can be connected together. In the conventional electrical junction box, two joint bus bars for connecting two circuit boards are used to connect the three circuit boards, but the connection of the three circuit boards is 1 as described above. If the joint bus bar is used, the number of bus bars is reduced and the cost is low.

  Further, if the connection terminal 2 also serves as a fuse terminal mounted on the circuit boards 1A and 1B, it is not necessary to provide a connection terminal for connecting to the joint bus bar 4. That is, since a large number of electrical components such as fuses are mounted on the circuit boards 1A and 1B, terminals (for example, fuse terminals as described above) for connecting these electrical components are provided. If the circuit is designed so that it can be connected to the joint bus bar 4, there is an advantage that a connection terminal specially provided for the joint bus bar 4 and a terminal holder for holding it are not necessary.

[Embodiment 2] FIG. 2 shows another embodiment of the electrical junction box according to the present invention. This embodiment is different from the first embodiment in that a coating 7 by resin dipping is provided on the surface of the joint bus bar 4 in order to insulate a plurality of joint bus bars 4. The resin dipping coating 7 may be provided only on one of the two joint bus bars 4 that may be in contact with each other.

  Since the configuration other than the above is the same as that of the first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

Embodiment 3 FIG. 3 shows still another embodiment of the electrical junction box according to the present invention. This embodiment is different from the first embodiment in that the circuit board constituting the connection circuit is divided into two base circuit boards 11A and 11B common to all car models and an additional circuit board 12 dedicated to each car model. Is. If it does in this way, while being able to respond to a circuit change flexibly, optimal circuit design can be performed for every vehicle model. In addition, low-grade models with few circuits can reduce costs and weight by not mounting additional circuit boards. In this embodiment, the base circuit boards 11A and 11B and the additional circuit board 12 are connected by a joint bus bar (not shown) as in the first and second embodiments.

  In FIG. 3, 13 is an upper cover, 14 is an upper case, 15 is a lower case, and 16 is a lower cover. The base circuit boards 11 </ b> A and 11 </ b> B and the additional circuit board 12 are accommodated in the upper case 14 and the lower case 15. The circuit boards 1A to 1C shown in FIGS. 1 and 2 are also housed in a case constituted by an upper case and a lower case like the base circuit boards 11A and 11B and the additional circuit board 12 shown in FIG.

The front view which shows the principal part of one Embodiment of the electrical-connection box which concerns on this invention. The front view which shows the principal part of other embodiment of the electrical junction box which concerns on this invention. The disassembled perspective view which shows other embodiment of the electrical-connection box of this invention. The front view which shows the principal part of the conventional electrical junction box.

Explanation of symbols

1A, 1B, 1C: Metal core circuit board 2: Connection terminal 3: Terminal holder 4: Joint bus bar 6: Insulating sheet 7: Resin dipping coating

Claims (1)

In an electrical junction box having a plurality of circuit boards connected by a joint bus bar, insulation between the joint bus bars is performed by an insulating sheet interposed between the joint bus bars or a resin dipping coating formed on the surface of the joint bus bar. At least one of the electrical connection boxes is formed so that three or more circuit boards can be connected.

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