JP2001268748A - Circuit body accommodated in junction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit body which may be used in common flexibly for change of external connecting parts or the like in a junction box for a wire harness in a vehicle. SOLUTION: In the circuit body to be accommodated in the junction box, a bus bar 11 locates the contact points of a plurality of circuit patterns at the circumference of a recess 12a. On the other hand, in a switch circuit body 14, a plurality of L-shape circuit switching bus bars 13 are fixed on an insulated board 14a fixed through the engagement to the upper part 12a. Each circuit switching bus bar 13 has a contact portion with a terminal 13a in the connector 14b. A wire end connection terminal, a relay terminal or a fuse terminal in the connector 14b connected to the bus bar 11 are switched by changing engagement of the switch circuit body 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit body accommodated in a junction box, and more particularly, to a junction box connected to a wire harness for an automobile, which flexibly responds to changes in external connection parts and the like. And a sharable circuit body can be provided.

[0002]

2. Description of the Related Art Conventionally, among electric connection boxes for automobiles, FIG.
In the junction box 1 shown in FIG. 1, bus bars 5A to 5D are stacked and arranged between the upper case 2 and the lower case 3 with insulating plates 4A to 4E interposed therebetween. Further, insulating plates 4G and 4F provided with wire guide grooves at both upper and lower ends are arranged, and the wires 6A and 6B are laid and accommodated on the insulating plates 4G and 4F, and provided on the upper case 2 and the lower case 3. The terminals of the relay 8, the fuse, and the connector fitted in the connector accommodating portion, the retainer accommodating portion, and the fuse accommodating portion are brought into contact with the tab 7 protruding from the bus bar, and the electric wires 6A and 6B are pressed into contact terminals (not shown). And the pressure contact terminals are brought into contact with the terminals of the connector, relay and fuse.

[0003]

As described above, the conventional junction box has a very complicated structure, and in particular, the structure of a connection portion between a connector, a relay, and a fuse and an external circuit becomes complicated. ing. These connectors,
Even if the relay and fuse can be shared even if the model is different, the internal circuit is changed according to the model at the same time as it is changed, so that the design complexity is doubled and the mold production is troublesome There's a problem. Conversely, even if the internal circuit such as the bus bar can be used even if the vehicle model is different, the same applies when the connection circuit with the connector, the relay, and the fuse cannot be shared depending on the vehicle model, and the bus bar itself must be replaced. In this case, since the bus bar requires punching and bending using a dedicated die, the bus bar manufacturing cost including the die cost is particularly high, which has caused a cost increase.

The present invention has been made in view of the above-mentioned problems, and has general versatility for external connection parts such as connectors, relays, and fuses so that they can be used in different types of vehicles. It is an object of the present invention to expand the range of common use of the components constituting the junction box with versatility.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a circuit body housed in a junction box, comprising: an insulating plate body to which a bus bar is fixed; and a recess provided in the insulating plate body. A switch circuit body that can be removably fitted and fixed, wherein the bus bar positions contact points of a plurality of circuit patterns on the periphery of the recess, while the switch circuit body is on an insulating plate that is fitted and fixed in the recess; A plurality of L-shaped circuit switching bus bars are fixed to
One end of each circuit switching bus bar that protrudes vertically becomes a terminal portion that is connected to a wire terminal connection terminal, a relay terminal, or a fuse terminal in the connector, and the other end that protrudes horizontally extends to the periphery of the insulating plate. Provided is a circuit body that is housed in a junction box that is configured to extend and serve as a contact part that contacts the bus bar, and that a terminal part in the connector that is connected to the bus bar is switched by fitting the switch circuit body. I have.

More specifically, the switch circuit is shared by different vehicle types, while the bus bar is dedicated to the vehicle type. In this case, the bus bar and the case are manufactured exclusively for the vehicle type, and the common switch circuit is housed in the case in combination with the bus bar. With this configuration, the connection portions with the complicated configuration of the connector, the relay, and the fuse can be shared, and as a result, the junction box can be manufactured at low cost.

Alternatively, on the contrary, the bus bar is shared by different vehicle types, while the switch circuit is dedicated to the vehicle type. With this configuration, the connection path can be changed or the external connection component connected to the switch circuit can be changed without changing the bus bar by fitting the switch circuit. Therefore, a bus bar corresponding to a plurality of types of specifications can be realized by one type of shared circuit bus bar, and the versatility of a circuit body in a junction box can be improved.

The recess and the switch circuit are disc-shaped or regular polygonal, so that the switch circuit can be fitted in the recess in a different direction. Thereby, the fitting direction of the switch circuit body with respect to the concave portion can be changed, and a combination of a plurality of types of circuit connections can be realized by one switch circuit body. Particularly, in the case of a regular polygonal shape, the fitting direction can be regulated, so that it can be easily positioned at a position corresponding to the required circuit connection.

The contact portion of the bus bar is bent along the inner peripheral surface of the concave portion, while the contact portion of the circuit switching bus bar of the switch circuit body is bent along the outer peripheral surface, and the contact portion is brought into surface contact. It is preferable to make it possible. In this case, the contact reliability between the bus bar and the circuit switching bus bar can be improved.

When the bus bar is shared, it is preferable to prepare a plurality of switch circuit bodies having different circuit configurations of the switching bus bar, replace the switch circuit body, and fix the switch circuit body in the recess. . By selectively replacing the switch circuit body, it is possible to easily cope with a change in the specification of external connection parts to be connected to the switch circuit body, and further increase the sharing ratio of the insulating plate body to which the shared circuit bus bar is fixed. Can be enhanced.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 4 show a first embodiment of a circuit body 10 stacked and accommodated in a junction box for an automobile, and the circuit body 10 is an insulating plate body to which a bus bar 11 made exclusively for a vehicle type is fixed. 12 and a switch circuit body 14 to which a circuit switching bus bar 13 is fixed. The switch circuit body 14 is commonly used for all types of vehicles.

At a required position on the insulating plate main body 12, a rectangular concave portion 12a into which a rectangular switch circuit body 14 can be fitted is formed. On the other hand, the bus bar 11 fixed to the insulating plate main body 12 is divided into a plurality of circuit patterns 11A, 11B, 11C, and 11D to be selectively connected. Then, as shown in FIG. 2A, each circuit pattern 11A, 11B, 11C, 11D on the bus bar 11 is formed.
Are bent and arranged so that one end of each of them contacts the inner peripheral surface of the concave portion 12a to form the contact portions A, B,.

The switch circuit body 14 is adapted to be removably fitted and fixed to the recess 12a. The circuit switching bus bar 13 fixed to the insulating plate 14a of the switch circuit body 14 is composed of a plurality of L-shaped conductors embedded along a required path, and each circuit switching bus bar has one vertically protruding end. Connector 1 integrally projecting on insulating plate 14a
4b is a terminal portion 13a introduced into the terminal portion 4b. This terminal portion 13a is a wire terminal connection terminal that is an external connection component P,
Connected to relay terminals or fuse terminals.

On the other hand, the other end of the circuit switching bus bar 13
The bus bar 11 extends to the periphery of the insulating plate 14a corresponding to the positions of the contact portions A, B,..., And is formed to bend along the outer peripheral surface thereof. Thus, the contact portions E, F,... And the contact portions A, B,. Then, as shown in FIG. 2B, after the switch circuit body 14 is fitted and fixed in the concave portion 12a, as shown in FIG. 3, the terminal T of the external connection component P is connected to the terminal portion 13a. . The fitting of the switch circuit body 14 to the concave portion 12a is fixed by employing a locking means such as press-fitting, a locking projection, or the like to maintain the fitted state.

The contact points A, B,.
The contact portions E, F,... Of the circuit switching bus bar 13 are both buried by providing cutouts 12d, 14d in the insulating plates 12, 14a.
And the inner peripheral surface of the recess 12a are closely fitted.

In order to perform circuit switching of the circuit body 10 having the above configuration, as shown in FIGS. 4A and 4B, a switch circuit body 14 having a circuit switching bus bar 13 is connected to a bus bar which differs depending on the type of vehicle. 11-1 and 11-2 are fitted and fixed in the respective recesses 12a of the insulating plates 12-1 and 12-2 to which the 11-1 and 11-2 are fixed. Thereby, even if the bus bar 11 is changed, the switch circuit body 24 can be used in common.

FIG. 5 shows a circuit body 40 according to the second embodiment.
Are made into a regular polygonal shape such as a square, and the contact portions A, B... Of the bus bar 41 are arranged at equal intervals on a plane. In this manner, the switch circuit body 44 to be fitted into the concave portion 42a can be rotated in the horizontal direction to change the direction and be fitted, and the contact portions A, B... And the contact portions E, F. The connection path can be changed by changing the connection position. Other configurations are the same as those of the first embodiment, and therefore, the same reference numerals are given and the description is omitted. Further, as a modified example of the second embodiment, as shown in FIG. 5C, the concave portion 52a and the switch circuit body 54 are formed in a circular shape, and the contact portions A, B... , F... Can be adapted to more circuit changes.

FIG. 6 shows a third embodiment. Contrary to the first and second embodiments, the bus bar 11 'is used in common with the vehicle type.
The circuit of the switch circuit is different depending on the vehicle type.
In the third embodiment, as shown in FIGS. 6A and 6B, a switch circuit body 2 including circuit switching bus bars 23, 33,... Having different circuit configurations, terminal portions, and connectors.
.. Are prepared, and these are selectively fitted and fixed in the recesses 12a. This changes the connection path with the shared circuit bus bar 11 ′,
It can respond to changes in external connection parts. Note that the same switch circuit may be rotated to change the connection form with the bus bar 11 '.

In each of the above embodiments, only one connector 14b is provided on the switch circuit body 14 in correspondence with one external connection component. However, a plurality of connectors 14b are provided on the insulating plate 14a. Different types of connectors 14b may be protruded to connect a plurality of external connection components.

[0020]

As is clear from the above description, in the circuit body housed in the junction box of the present invention, the switch circuit body can be changed into the recess of one insulating plate main body, so that it can be changed depending on the type of vehicle. Even if the bus bar is changed accordingly, the switch circuit connected to the bus bar can be used in common. Conversely, although the bus bar is shared, even when there is a change in the specifications of the external connection parts, it is possible to easily cope with the change of the switch circuit body without changing the bus bar. Therefore, each time the circuit of the bus bar is changed or the external connection parts are changed, it is not necessary to re-manufacture the connection parts of the junction box with the connector, relay, and fuse, or it is not necessary to re-manufacture the bus bar. Sharing can be achieved. As a result, the junction box can be manufactured quickly and inexpensively.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a circuit body housed in a junction box of the present invention.

FIGS. 2A and 2B are cross-sectional views showing a process of fitting a switch circuit body into an insulating plate main body.

FIG. 3 is a cross-sectional view showing a state where an external connection component is fitted to a connector of the switch circuit body.

FIGS. 4A and 4B are schematic plan views showing a state in which a common switch circuit and bus bars of different types are fitted.

FIGS. 5A to 5C are plan views showing a second embodiment and a modified example thereof.

FIGS. 6A and 6B are schematic plan views showing a third embodiment, wherein FIGS. 6A and 6B show a state in which a common bus bar and a switch circuit body of a different type are fitted.

FIG. 7 is a diagram showing a conventional example.

[Explanation of symbols]

 10, 40 circuit body 11 bus bar 11A, 11B, 11C, 11D circuit pattern 12 insulating plate main body 12a, 42a, 52a recessed part 13, 23, 33 circuit switching bus bar 13a terminal portion 14, 24, 34, 44, 54 switch circuit body 14a Insulating plate 14b Connector A, B ... Contact point E, F ... Contact point P External connection parts

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor: Yuki Saito, 1-114, Nishisuehirocho, Yokkaichi, Mie Prefecture Inside Sumitomo Wiring Systems, Ltd. (72) Inventor: Nobufumi Kobayashi, 1-14, Nishisuehirocho, Yokkaichi, Mie Prefecture No. Sumitomo Wiring Systems, Inc. F-term (reference) 5G361 BA04 BB01 BC03

Claims (5)

[Claims] 1. A circuit body housed in a junction box, comprising: an insulating plate body to which a bus bar is fixed; and a switch circuit body that can be removably fitted and fixed to a recess provided in the insulating plate body. While a plurality of L-shaped circuit switching bus bars are fixed on an insulating plate fitted and fixed in the recess, the switch circuit body has a plurality of L-shaped circuit switching bus bars fixed on the periphery of the recess. One end of each circuit switching bus bar that protrudes vertically becomes a terminal portion that is connected to a wire terminal connection terminal, a relay terminal, or a fuse terminal in the connector, and the other end that protrudes horizontally extends to the periphery of the insulating plate. The contact portion extends and comes into contact with the bus bar, and the terminal portion in the connector connected to the bus bar is cut by fitting the switch circuit body. Circuit member for accommodating the junction box is an alternative configuration. 2. The circuit body housed in a junction box according to claim 1, wherein the switch circuit body is shared by different vehicle types, while the bus bar is dedicated to the vehicle type. 3. The circuit body housed in a junction box according to claim 1, wherein the bus bar is shared by different vehicle types, while the switch circuit is dedicated to the vehicle type. 4. The switch circuit body according to claim 1, wherein the concave portion and the switch circuit body have a disc shape or a regular polygonal shape, and the switch circuit body can be changed in direction and fitted in the concave portion. A circuit body housed in the junction box according to claim 1. 5. The contact portion of the bus bar is bent along the inner peripheral surface of the recess, while the contact portion of the circuit switching bus bar of the switch circuit body is bent along the outer peripheral surface, and the contact portion is bent. A circuit body housed in the junction box according to any one of claims 1 to 4, which is in surface contact.