JPH0711827U - Electrical junction box - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a miniaturized electrical junction box with fewer restrictions on the circuit configuration than before. In an electric junction box in which busbars 11 are insulated and stacked to form a circuit structure, and the circuit structure is housed in a casing, the insulated and stacked busbars 11 are electrically connected by a tack 6. A laminated portion of bus bars connected electrically is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric connection box used for wiring in a vehicle.

[0002]

[Prior art]

 A conventional electrical junction box used for wiring in an automobile has a structure as shown in FIG. 6, for example. In the figure, 1 is a bus bar, 2 is an insulating plate, 3a is an upper housing, 3b is a lower housing, 4 is an electrical component such as a fuse, and 5 is a connector. The bus bar 1 is formed by punching a metal strip into a shape that constitutes a predetermined circuit. A circuit structure is formed by stacking a plurality of layers of the bus bar 1 with the insulating plate 2 interposed therebetween. Then, this circuit structure is housed in a housing formed of the upper housing 3a and the lower housing 3b to form an electrical junction box. In the above electric connection box, the end portion 1a of each bus bar 1 stands up in a tab shape, and the end portion 1a is connected to a terminal on the electric component 4 side such as a fuse or a relay and an intermediate connection terminal (not shown). Or using the connector 5 and the terminal portion of the electric wire. Further, recently, there has been devised a method in which an insulating coating is formed on one side or both sides of a bus bar, and the bus bar is directly laminated without using an insulating plate to form a circuit structure.

[0003]

[Problems to be solved by the device]

 In the above-described circuit structure that constitutes the electrical junction box, the busbars are laminated with the insulating plate or the insulating film interposed therebetween, so that the upper and lower busbars are not electrically connected. As a result, the number of busbar layers may increase in order to properly arrange the input / output section and electrical component connection section, which are constrained in the circuit configuration and are formed by the tab-shaped upright parts of the busbar. However, there is a problem that the electric junction box becomes large.

[0004]

[Means for Solving the Problems]

 The present invention provides an electrical junction box that solves the above-mentioned problems. In the electrical junction box, the busbars are insulated and laminated to form a circuit structure, and the circuit structure is housed in a housing. A first invention is to have a laminated portion of a busbar in which insulated and laminated busbars are electrically connected by a tack, and in the above invention, a tack is to have a wedge-shaped piece as a second invention. .

[0005]

[Action]

 As described above, by providing the laminated portion of the busbar in which the laminated busbars are electrically connected to each other by the tacks, the restriction on the circuit configuration becomes smaller than the conventional one, and the electric junction box can be made smaller than the conventional one. it can. Also, if a wedge-shaped piece is provided on the tack, the wedge-shaped piece will break the insulating coating when there is an insulating coating on the surface of the bus bar. it can.

[0006]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is an exploded perspective view of an embodiment of an electric junction box according to the present invention. In FIG. 1, the bus bar 11 is covered on both sides with insulating coatings, and sufficient insulation is secured. Therefore, the insulated bus bar 11 is laminated without an insulating plate. The end 11a of the bus bar 11 has an insulating coating removed, and is connected to an electric wire through an electric component 4 such as a fuse and a connector 5. A tack 6 is provided at a predetermined position of the bus bar 11 so that the upper and lower bus bars 11 are electrically connected. Reference numeral 3a is an upper housing, and 3b is a lower housing.

As shown in FIG. 2A, the tack 6 used in this embodiment has wedge-shaped pieces 6a at both ends. FIG. 2B is an enlarged cross-sectional view of the portion A in FIG. 1. When the tack bar 6 is caulked and the bus bar 11 is connected, the wedge-shaped piece 6a breaks the insulating coating 12 of the bus bar 11 and the bus bar 11 is broken. It reaches the metal layer 13 and secures electrical continuity. The structure of the tack 6 is not limited to the above embodiment, and for example, as shown in FIG. 3, the wedge-shaped piece 6a may be formed by a ring, and the wedge-shaped piece 6a may be interposed between the upper and lower heads 6b. .

FIG. 4 shows another embodiment, in which the bus bar 11 itself is not insulated and a thin insulating film 14 is inserted between the bus bars 11. A peeling portion is provided on the lower insulating film 14, and the tack 6 is attached thereto. Therefore, in this case, it is not necessary to provide the stud 6 with a wedge-shaped piece. 5 (a) and 5 (b) show an example in which the bus bar 11 with the end portion 11a standing upright is connected to another core bus bar 21 by a tack 6. In the example of FIG. 5A, the surface of the core bus bar 21 is provided with an insulating coating, and the bus bar 11 is not provided with an insulating coating. Further, in the example of FIG. 5B, an insertion hole is provided in the backbone bus bar 21, and the upright end portion 11 a of the bus bar 11 is inserted into the front side from the back of the backbone bus bar 21. In these examples, the shape and thickness of the upright end portion 11a can be freely designed regardless of the thickness of the basic bus bar 21, and therefore, there is an advantage that the degree of freedom in designing and manufacturing the circuit structure is increased. . Needless to say, it is desirable that the bus bars and the insulating plate between the bus bars are thin in order to connect the bus bars by tacking. Further, the tacking may be a direct hitting method by an ordinary method, or a through hole may be provided in the bus bar in advance to fix the tacking.

[0009]

[Effect of device]

 As described above, according to the present invention, a busbar is insulated and laminated to form a circuit structure, and the circuit structure is housed in a case. Since the laminated portion of the busbars, which electrically connect the busbars to each other by the tacks, is provided, there are fewer restrictions on the circuit configuration than before, and the electrical junction box can be made smaller than before and cost is reduced. It has the excellent effect that

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of an electrical junction box according to the present invention.

2 (a) and 2 (b) are respectively a side view of a tack used in the above embodiment and an enlarged sectional view of a portion A in FIG.

FIG. 3 is a perspective view of another embodiment of the tack.

FIG. 4 is a cross-sectional view of another embodiment in which bus bars are connected by tacks.

5 (a) and 5 (b) are perspective views of another embodiment in which bus bars are connected by tacks, respectively.

FIG. 6 is an exploded perspective view of an example of a conventional electrical junction box.

[Explanation of symbols]

 1, 11, 21 Bus bar 1a, 11a End part 2 Insulation plate 3a Upper case 3b Lower case 4 Electrical component 5 Connector 6 Tack 6a Wedge piece 6b Head 12 Insulation film 13 Metal layer 14 Insulation film

Claims (2)

[Scope of utility model registration request] 1. An electric junction box in which a busbar is insulated and laminated to form a circuit structure, and the circuit structure is housed in a casing. The insulated and laminated busbars are electrically connected by a tack. An electric junction box having a laminated portion of a bus bar connected to the. 2. The electrical junction box according to claim 1, wherein the stud has a wedge-shaped piece.