JPH0928019A - Electrical junction box - Google Patents

Abstract

(57) Abstract: To provide an electrical junction box which can enhance the versatility of parts by reducing the cost by providing flexibility in circuit connection. SOLUTION: In an electric connection box in which an internal circuit is constituted by a bus bar 31 arranged on a bus bar wiring board 23,
The printed circuit board 21 is fixed to the bus bar wiring board 23, and the pressure contact terminal 29 exposed to the outside of the bus bar wiring board 23 is provided on the printed circuit board 21, and the pressure contact terminal 29 and the pressure contact terminal 33 formed on the bus bar 31 are provided. They were connected by an electric wire 35 pressed against them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection box mounted on a vehicle, and more particularly to an electric connection box in which a printed circuit board constituting an electronic unit is incorporated.

[0002]

2. Description of the Related Art In a general vehicle, as shown in FIG. 6, an electric junction box having a printed circuit board (not shown) housed in a case 1 and a bus bar wiring board (not shown). 3 are provided separately, and both are connected by connectors 4 and 5. In this case, a female-female terminal 6 whose one end is connected to a built-in printed circuit board is used as a terminal of the connector 4 on the electronic unit 2 side, and a terminal of the connector 5 on the electric connection box 3 side is a bus bar incorporated therein. The integrally formed male tab 7 is used.

[0003] As another example, the actual Kaihei 5-6212.
The one described in Japanese Patent No. 6 is known. With this technology,
As shown in FIGS. 7A and 7B, by inserting the electronic unit 9 into the electric connection box 8, the bus bar 10 and the electronic unit 9 in the electric connection box 8 are connected to each other with a specially shaped relay terminal. The connection is made via 11.

[0004]

By the way, in the prior art shown in FIG. 6, the case 1 for protecting the printed circuit board is required exclusively, and the female-female terminal 6 is indispensable, resulting in an increase in cost. It was Further, in the conventional technique shown in FIGS. 7A and 7B, the relay terminal 11 having a special shape having the same function as the female-female terminal is also required, resulting in an increase in cost. Further, neither of them can easily cope with a change in circuit connection, and it has been difficult to generalize parts.

In view of the above circumstances, it is an object of the present invention to provide an electric junction box which can increase the versatility of parts by providing flexibility in circuit connection and can reduce the cost. To do.

[0006]

According to a first aspect of the present invention, there is provided an electric connection box in which an internal circuit is constituted by bus bars arranged on a bus bar wiring board, the printed circuit board is fixed to the bus bar wiring board, and the printed circuit board is fixed. A pressure contact terminal exposed to the outside of the bus bar wiring board is provided, and the pressure contact terminal and the pressure contact terminal formed on the bus bar are connected by an electric wire pressed against them.

According to a second aspect of the present invention, there is provided the electrical junction box according to the first aspect, in which the printed circuit board is fixed to a front surface side of the bus bar wiring board and the pressure contact terminals provided on the printed circuit board are connected to the bus bar wiring board. Of the printed circuit board and the bus bar pressure contact terminal are connected by the electric wire on the back surface side.

A third aspect of the present invention is the electric connection box according to the first or second aspect, wherein the printed circuit board is provided with a direct connector for connection with a wire harness.

A fourth aspect of the present invention is the electrical junction box according to any one of the first to third aspects, characterized in that the electrical junction box includes a main cover that covers both the bus bar wiring board and the printed circuit board.

The invention of claim 5 is the electrical junction box according to any one of claims 1 to 4, wherein the printed circuit board 21
It is characterized in that the press-contact terminal 29 provided on the printed circuit board 21 is fixed to the printed circuit board 21 by soldering with a plurality of projecting pieces 29a provided on the base end thereof penetrating the printed circuit board 21.

According to the first aspect of the present invention, the printed circuit board that constitutes the electronic unit is fixed to the busbar wiring board inside the electric connection box, and the electric wire is pressed against the pressure contact terminal to electrically connect the printed circuit board and the busbar. Therefore, the female-female terminal for connecting the printed circuit board and the bus bar can be eliminated. Further, it is possible to delete the male tabs collectively provided for the connection by the female-female terminal and the bus bar leading to the male tab, and it is possible to reduce the total amount of bus bars or the number of bus bar layers. it can. Further, since the connection path can be easily changed by arranging the electric wires, the structure other than the electric wires can be made common and the parts can be generalized. Further, since the printed circuit board is fixed to the bus bar wiring board and assembled in the electric connection box, the case dedicated to the printed circuit board can be eliminated.

According to the second aspect of the present invention, the printed circuit board and the bus bar can be electrically connected by arranging the electric wire on the back surface side of the bus bar wiring board and pressing the electric wire to the press contact terminal.

According to the third aspect of the invention, the wire harness and the printed circuit board can be directly connected by the direct connector. Therefore, it is not necessary to connect via the busbar circuit, and the busbar can be reduced accordingly.

According to the invention of claim 4, the bus bar wiring board and the printed circuit board can be protected together by covering the main cover.

According to the fifth aspect of the present invention, the number of the projecting pieces at the base end of the press contact terminal, which are penetrated into the printed circuit board and soldered, is plural. Stability increases when pressing the wire with the tool to press the wire.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 (a) is a sectional view showing a part of the internal structure of the electric junction box of the embodiment, FIG. 3 is an external perspective view of a bus bar wiring board housed inside the electric junction box, and FIG. It is an external appearance perspective view of a connection box.

This electrical junction box has a bus bar wiring board 23 (see FIG. 3) housed inside, and a main cover 50 and an under cover 52 (see FIG. 4) which form an outer case. The bus bar wiring board 23 includes a plurality of bus bars 31 that form an internal circuit for electrical connection, and an insulating plate 24 that supports them in an insulated state.

As shown in FIG. 1A, the printed board 21 is fixed to the front surface side of the bus bar wiring board 23. As for the fixing method, the welding boss 25 may be used as shown in this figure, or the locking piece 40 may be used as shown in FIG.
Alternatively, the peripheral edge portion of the printed circuit board 21 may be fitted into the locking groove 41 and fixed.

As shown in FIG. 1 (a), various components are mounted on the printed board 21 and pressure contact terminals 29 are mounted. The pressure contact terminal 29 is, for example, as shown in FIG.
As shown in (c), the rectangular projecting piece 29a provided at the upper end (base end) is soldered to the printed conductor while penetrating the printed circuit board 21.
Is fixed to the pressure contact portion 37 at the lower end shown in FIG.
Through the through hole 27 of the bus bar wiring board 23, but protrudes to the back surface side of the bus bar wiring board 23.

In this case, when the electric wire 35 is pressed, as shown in FIG. 1C, the tip of the projecting piece 29a (the upper end in the figure).
The jig J is applied to the above to perform the pressure welding, and in order to further enhance the stability at that time, as shown in FIG.
As shown in FIG. 1D, the protrusion 2
Two 9a may be provided at both ends of the press contact terminal 29 in the width direction so as to have the same height. In this case, since the pressing at the time of pressing the electric wire is performed at two points, the stability of the press contact terminal 29 is improved and the press contact reliability can be improved. The number of the protruding pieces 29a may be two or more.

Busbar 31 of busbar wiring board 23
Also, the pressure contact terminals 33 projecting to the back surface side of the bus bar wiring board 23 are integrally provided at necessary locations. Pressure contact terminal 2
The shape of the press-contacting portions 37 of 9 and 33 is the same as a normal one as shown in FIG.

The pressure contact terminal 2 on the printed circuit board 21 side
9 and the pressure contact terminal 33 on the bus bar 31 side correspond to each other, and by the electric wire 35 whose both ends are pressure contacted,
The bus bar wiring board 23 is interconnected on the back surface side.
In this case, since the electric wire 35 is arranged on the back surface side of the bus bar wiring board 23, the electric wire 35 does not get in the way and the electric wire 35 can be laid in a free path.

The pressure contact terminals 29, 33 to be connected in this way
After connecting each other with electric wire 35, bus bar wiring board 23
As shown in FIG. 4, the printed circuit board 21 and the printed circuit board 21 are housed in an outer case including a main cover 50 and an under cover 52.

Further, the printed circuit board 21 is connected to the electrical junction box 23.
As it is mounted on the printed circuit board 21, the
As shown in, a direct connector 43 for directly connecting to the wire harness is provided, and the main cover 50 is
As shown in FIG. 4, an opening 45 that allows connection of the mating connector to the direct connection connector 43 is provided.

According to the electrical junction box of this embodiment, the printed circuit board 21 is fixed on the bus bar wiring board 23, and the electric wires 35 are pressed to the press contact terminals 29 and 33. Since 31 is connected, a female-female terminal is unnecessary.

Further, conventionally, as shown in FIG. 5 (b), since the connection is made by the female-female terminal which constitutes the connector,
It was necessary to collectively arrange the male tabs 60 of the busbars 31, and the busbars up to the male tabs 60 were also necessary. However, as shown in FIG. Since it is replaced by 33 and the electric wire 35, a male tab and a bus bar leading up to it (range indicated by a chain double-dashed line in the figure)
Since 65 is unnecessary, the total amount of bus bars 31 or the number of layers of bus bars 31 can be reduced.

Since the wiring of the electric wires 35 can be freely set, the connection path can be easily changed.
Therefore, the structure other than the electric wire can be shared, and the parts can be generalized.

Further, as shown in FIG.
Since 1 is accommodated in the same main cover 50, a case dedicated to the printed circuit board is not required.

Furthermore, since the wire harness and the printed circuit board 21 can be directly connected by the direct connector 43, it is not necessary to connect through the bus bar circuit, and the bus bar can be reduced accordingly.

[0031]

As described above, according to the first aspect of the invention, the female-female terminal used for connecting the printed circuit board and the bus bar can be eliminated, and the portion to be connected by the electric wire can be eliminated. Busbars can be eliminated, and the total amount of busbars or the number of layers of busbars can be reduced. Also, the case dedicated to the printed circuit board can be eliminated. Therefore, it is possible to reduce the number of parts and the bus bar mold. Moreover, since the connection path can be easily changed by arranging the electric wires, the structure other than the electric wires can be generalized. Therefore, a greater cost reduction effect can be obtained.

According to the second aspect of the present invention, the electric wires can be arranged on the back side of the bus bar wiring board to connect the printed circuit board and the bus bar. Therefore, the electric wires do not get in the way and the electric wires can be freely routed. Can be wired.

According to the invention of claim 3, since the wire harness and the printed circuit board can be directly connected by the direct connector, the bus bar can be omitted accordingly and the cost can be reduced.

According to the invention of claim 4, it is not necessary to separately provide a cover for the printed circuit board, and the number of parts can be reduced.

According to the fifth aspect of the present invention, since the plurality of protrusions of the pressure contact terminals provided on the printed circuit board are provided, the stability is improved when the protrusions are pressed by the jig to perform the wire pressure contact, and the pressure contact reliability is improved. Is improved.

[Brief description of drawings]

1A and 1B show a configuration of a main part of an embodiment of the present invention. FIG. 1A is a sectional view, FIG. 1B is a sectional view taken along the line Ib of FIG. 1A, and FIG. The figure which shows an example of a pressure contact terminal, (d) is a figure which shows the other example of the same pressure contact terminal.

FIG. 2 is a cross-sectional view showing a modified example of the printed circuit board fixing portion according to the embodiment of the present invention.

FIG. 3 is an external perspective view of a bus bar wiring board housed inside an electrical junction box according to an embodiment of the present invention.

FIG. 4 is a perspective view showing a state in which an upper cover is covered in the state of FIG.

FIG. 5 is a diagram used for explaining an effect of one embodiment of the present invention, in which (a) is a wiring example in the case of the embodiment of the present invention,
(B) is a plan view showing a conventional wiring example.

FIG. 6 is a perspective view of a conventional example.

FIG. 7 shows another conventional example, (a) is an overall perspective view,
(B) is the block diagram of the principal part.

[Explanation of symbols]

 21 Printed Circuit Board 23 Bus Bar Wiring Board 29 Pressure Contact Terminal 29a Projection Piece 31 Bus Bar 33 Pressure Contact Terminal 35 Wire 43 Direct Connector 50 Main Cover

Claims (5)

[Claims] 1. An electric junction box in which an internal circuit is constituted by bus bars 31 arranged on a bus bar wiring board 23, wherein a printed circuit board 21 is fixed to the bus bar wiring board 23 and the bus bar wiring board 23 is connected to the printed circuit board 21. The press contact terminal 29 exposed to the outside is provided, and the press contact terminal 29 is provided.
An electric connection box, characterized in that the pressure contact terminal 33 formed on the bus bar 31 is connected by an electric wire 35 pressed against them. 2. The electrical junction box according to claim 1, wherein the printed circuit board 21 is fixed to a front surface side of the bus bar wiring board 23, and the pressure contact terminal 29 provided on the printed circuit board 21 is a bus bar wiring board. An electrical junction box, which is exposed on the back surface side of 23, and the pressure contact terminal 29 of the printed circuit board 21 and the pressure contact terminal 33 of the bus bar 31 are connected by the electric wire 35 on the back surface side. 3. The electrical connection box according to claim 1, wherein the printed circuit board 21 is provided with a direct connection connector 43 with a wire harness. 4. The electrical junction box according to claim 1, further comprising a main cover 50 that covers both the bus bar wiring board 23 and the printed circuit board 21. . 5. The electrical junction box according to claim 1, wherein the press contact terminal 29 provided on the printed board 21 has a plurality of protrusions 29a provided at a base end thereof. The printed circuit board 2 can be
An electrical junction box, which is fixed to 1.