JPH08227738A - Connecting structure of electric connection box - Google Patents

Abstract

PURPOSE: To connect the internal circuit of an electric connection box with the constituting wire of a wire harness without a connector. CONSTITUTION: This structure is a connecting structure of a conductor constituting the internal circuit of an electric connection box 10 (electric wire 10, bus bar 30) to the wire 15 of an external circuit constituting a wire harness W/H. The wire 15 of the external circuit is inserted into the case of the electric connection box through a wire insert hole 16 opened in the case, and the core wire of the wire of the external circuit is connected to the conductor of the internal circuit by welding or through a pressure contact terminal 20 without a connector.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure of an electric connection box, and more specifically, to a connection structure between an internal circuit of an electric connection box such as a junction box and each electric wire of a wire harness, and an inside of the electric connection boxes. The present invention relates to a connection structure for connecting a circuit via an electric wire of a wire harness, and particularly to a connection structure without using a connector.

[0002]

2. Description of the Related Art Conventionally, when connecting wires forming a wire harness to an internal circuit of an electric junction box such as a junction box, terminals are connected to core wires exposed from the ends of these wires and these terminals are housed in a connector. On the other hand, the above connector is fitted into the connector accommodating portion formed in the electric connection box, and the terminal accommodated in the connector is passed through the tab and the relay terminal provided on the bus bar forming the internal circuit of the electric connection box. Often connected. Also, when the internal circuit of the electrical junction box is composed of a single wire and pressure contact terminals,
The pressure contact terminal is connected to the external terminal connection tab directly or via a relay terminal.

Also, as shown in FIG. 7, when a plurality of junction boxes 1A and 1B are connected to a wire harness W / H and the junction boxes 1A and 1B are connected to the internal circuits, the same is true. H
Terminals are connected to the ends of the electric wires of the branch line 3 branched from the main line 2, and these terminals are accommodated in the connector 4 and are fitted and connected to the connector accommodating portions 5 formed in the junction boxes 1A and 1B, respectively. .

As described above, conventionally, terminals are connected to the ends of the electric wires that form the wire harness, the terminals are housed in the connector, and the terminals are connected to the electrical junction box through the connector.

[0005]

As described above, since the electric connection box and the wire harness are all connected by connectors, a connector accommodating portion must be formed in the electric connection box, and a large number of connectors are required. In an electrical connection box such as a junction box that is connected to a vehicle, a large number of connector accommodating portions must be provided, which causes a problem that the junction box becomes large and its shape becomes complicated.

Further, on the side of the electric wires constituting the wire harness, it is necessary to connect terminals to the ends of each electric wire and accommodate these terminals in the connector, which requires a lot of work and required parts (terminals). , Connectors) increase and cost increases.

The present invention has been made in view of the above problems, and eliminates the connection via a connector, and directly connects the internal circuit of the electric connection box and the electric wire of the wire harness to reduce the size and shape of the electric connection box. The purpose is to reduce the number of parts as well as to simplify the terminal mounting work on the wire side and the connector housing work.

[0008]

In order to achieve the above object, the present invention provides, in claim 1, a conductor constituting an internal circuit of an electric junction box and an electric wire of an external circuit constituting a wire harness. In the connection structure, the electric wire of the external circuit is inserted into the case from the electric wire insertion opening opened in the case of the electric connection box, and the core wire of the electric wire of the external circuit and the conductor of the internal circuit are welded or via a pressure contact terminal. The connection structure of the connecting electric junction box is provided.

When the conductor forming the internal circuit of the electric junction box is an electric wire, it is connected to the electric wire of the external circuit via the pressure contact terminal. (Claim 2) In that case, at least two pressure contact blades are provided on the pressure contact terminal,
One of the press contact blades presses the electric wire of the internal circuit, and the other press contact blade presses the electric wire of the external circuit. Alternatively, while the electric wire of the internal circuit is pressure-connected to the pressure contact terminal, the wire of the external circuit may be connected by welding the core wire exposed by peeling off the end thereof to the pressure contact terminal. Further, both the electric wire of the internal circuit and the electric wire of the external circuit may be stripped of the insulating coating of the terminal to expose the core wires, and the exposed core wires may be welded to each other to be connected. (Claim 3)

When the conductor forming the internal circuit of the electric junction box is a bus bar, the core wire exposed from the end of the electric wire of the external circuit is welded and connected to the bus bar. (Claim 4) Alternatively, the bus bar may be provided with an external terminal portion having a press contact blade in a bent state, and an electric wire of an external circuit may be connected by press contact with the press contact blade. (Claim 5)

According to a sixth aspect of the present invention, an electric wire forming an internal circuit of an electric connection box is pulled out to the outside from an electric wire insertion port provided in a case of the electric connection box, and another electric connection box is connected. Provided is a connection structure of an electric connection box which is inserted into an inside of the case through an electric wire insertion opening provided in the case and is connected to an electric wire or a bus bar which constitutes an internal circuit of the other electric connection box by pressure welding terminals or welding. .

According to a seventh aspect of the present invention, the electric wire of the external circuit comprises a wire group of a main wire of a wire harness,
The electric wire according to any one of claims 1 to 6, wherein each electric wire of the electric wire group is inserted through an electric wire insertion port provided in parallel in the electric connection box and connected to a conductor of a desired internal circuit. The connection structure of the connection box is provided. That is, instead of providing a branch line from the main line of the wire harness as in the past and connecting the branch line to the electric junction box, the entire electric wire of the main line is connected to the electric junction box, and the inside of the connected electric junction box is connected. When it is not necessary to connect with a circuit, the internal circuit is used as a through circuit.

[0013]

According to the first aspect of the present invention, the electric wire of the external circuit forming the wire harness is inserted into the case through the electric wire insertion opening opened in the case of the electric connection box, and the core wire of the electric wire of the external circuit is inserted. Since the conductors of the internal circuit are connected via welding or pressure contact terminals, they can be connected without a connector, that is, without a connector. Therefore, it is possible to eliminate all the work of attaching the terminals to the electric wires of the wire harness, accommodating these terminals in the connector, and fitting the connector into the connector accommodating portion of the electric connection box. Further, since it is not necessary to provide the connector housing portion in the electric connection box, the electric connection box can be downsized and simplified.

When the conductor forming the internal circuit of the electric connection box is an electric wire as described in claim 2, if the conductor is connected to the electric wire of the external circuit via the pressure contact terminal, the connectorless connection can be made very easily. Can be done. Further, as described in claim 3, even if the core wires exposed from both ends of the electric wire of the internal circuit and the electric wire of the external circuit are welded and connected,
Connectorless connection is possible.

When the conductor forming the internal circuit of the electric junction box is a bus bar as described in claim 4, when the conductor is welded to the core wire exposed from the wire end of the external circuit, the connectorless connection is made. Is possible. Alternatively, as described in claim 5, a press-contact blade may be formed on the bus bar, and the electric wire of the external circuit may be press-contacted to be connected.

According to a sixth aspect of the present invention, an electric wire forming an internal circuit of the electric connection box is pulled out from an electric wire insertion port provided in a case of the electric connection box to form a wire harness as it is. When used as, the connection between the internal circuit on the side of the electric junction box and the wire of the wire harness becomes unnecessary, and since it is sufficient to connect only the internal circuit of the other electric junction box, the number of working steps and necessary parts are greatly reduced. It becomes possible to do.

As described in claim 7, when each wire of the wire group of the wire harness main line is inserted from the wire insertion port arranged in parallel in the electric connection box and connected to the conductor of the required internal circuit, A branch line for connecting to the electric connection box, which is formed in the wire harness, becomes unnecessary, and it is possible to eliminate splices or the like in the wire harness.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. 1 to 3 show a first embodiment, in which an internal circuit of an electric junction box 10 composed of a junction box is composed of an electric wire 11 and a pressure contact terminal 12. That is, the electric wire 11 is laid on the lower surface of the upper case 13 of the electric junction box 10 with the upper case 13 turned upside down as shown in FIG. 1, and the pressure contact terminal 12 is driven into the electric wire 11 for connection. ing. Since these pressure contact terminals 12 are connected to a relay, a fuse, etc. mounted on the junction box, a tab 12a for connecting an external terminal is provided on the upper case 13.
It is made to project from a terminal hole on the bottom surface of the housing portion 13a formed on the upper surface side of the above so as to be connected to a fuse, a relay or the like. In this way, an internal circuit is formed by the electric wire 11 and the pressure contact terminal 12, and a wire harness W / H described later is provided.
After the electric wire 15 and the electric wire 11 are connected, the upper case 13 and the lower case 14 are combined to form a junction box.

The upper case 13 of the electric junction box 10
On one side wall, the main wire 15 of the wire harness W / H
The wire insertion openings 16 are inserted in parallel so as to be inserted in parallel. These wire insertion ports 16 are shown in FIG. 2 and FIG.
As shown in (A) and (B), a plurality of partition walls 17 are provided with a certain pitch in the horizontal direction and extending in the vertical direction.
The space between the adjacent partition walls 17 is approximately equal to the outer diameter of the electric wire 15. Further, as shown in FIGS. 3 (A) and 3 (B), pressing portions 17a protruding in a substantially trapezoidal cross section are provided so as to face each other on the side surface of the partition wall 17 that is in contact with the electric wires 15. By pressing the opposing outer peripheral side surfaces, the electric wire 15 is prevented from coming off. Furthermore, the partition wall 1
An arcuate recess 17c is formed in a portion of the electric wire insertion opening 16 between the wires 7 and 7 so that the electric wire 15 is fitted and held stably.

All the electric wires 15 forming the trunk line of the wire harness W / H are inserted into the electric wire insertion openings 16 of the electric connection box 10 to locate the ends of the electric wires 15 inside the electric connection box 10.

As shown in FIG. 3C, the electric wire 15 (external circuit electric wire on the wire harness side) has the insulation coating 18 on its end stripped to expose the core wire 19. In addition, the electric wire 11 forming the internal circuit of the electric junction box 10
Also, at the terminal on the wire harness connection side, the insulation coating 20 is peeled off to expose the core wire 21. The exposed core wire 19 of the electric wire 15 of the external circuit and the exposed core wire 21 of the electric wire 11 of the internal circuit are soldered or ultrasonic welded,
Welded and connected by electric resistance welding.

The welded portion 22 is accommodated between the electric wire insertion openings 16 by lengthening the electric wire insertion opening 16 sandwiched by the partition walls 17 to some extent in the lengthwise direction of the electric wire. . Therefore, the partition wall 17 partitions the welded portion 22 that is inserted into the adjacent wire insertion port 16 by the partition wall 17 to ensure insulation.

As described above, the electric wire 11 of the internal circuit of the electric junction box 10 and the electric wire 1 of the external circuit of the wire harness W / H
After welding and connecting 5 and 5, the lower case 14 is attached to the upper case 13 of the electric junction box 10.

In the connection structure between the electric connection box 10 and the wire harness W / H, the electric wire 15 forming the wire harness W / H can be connected to the electric wire 11 of the internal circuit of the electric connection box without a connector. .

FIG. 4 shows the electric wire 1 of the internal circuit of the electric junction box 10.
1 is an example in which the electric wire 15 of the external circuit constituting the wire harness W / H is connected via the pressure contact terminals 20A to 20C. The pressure contact terminal 20A shown in FIG. 4A has a shape in which a pair of opposing wire pressure contact portions 20b and 20c are provided by bending both sides of a horizontal connecting plate portion 20a. Slots 20d, 2 of the lower surface opening are attached to these wire pressure contact portions 20b, 20c.
0e is formed, and the inner peripheral surface of each slot is pressed against the press contact blades 20f, 2
It is 0 g. Therefore, the ends of the electric wires 11 and 15 are opposed to each other, and the press-connecting terminal 20A is driven into the wire press-connecting portion 20.
When the press contact blades 20f and 20g of b and 20c are pressed against the core wires of the electric wires 11 and 15, the electric wire 11 is pressed through the press contact terminal 20A.
And 15 can be connected.

The pressure contact terminal 20B shown in FIG. 4 (B) is composed of a flat plate in the vertical direction, and the wire pressure contact portions 20b and 2 are arranged in the vertical direction.
0c is provided, and the electric wires 11 and 15 are vertically displaced, the terminals are arranged opposite to each other, and the upper and lower electric wire press contact portions 20b and 20c of the press contact terminal 20B are pressed and connected.

The pressure contact terminal 20C of FIG. 4C is a wire pressure contact portion 20 with the wire 11 of the internal circuit on the lower part of the vertical plate.
c is provided, and a flat plate portion 20h is provided at the upper end.
The electric wire 15 of the external circuit is obtained by peeling off the insulating coating 18 of the terminal in advance to expose the core wire 19, and the core wire 19 is brought into contact with the flat plate portion 20h of the pressure contact terminal 20C for soldering, ultrasonic welding, or the like. , Welded by electrical resistance welding and connected.

In each of the above embodiments, the internal circuit of the electric connection box 10 is composed of the electric wire and the pressure contact terminal. However, the internal circuit of the electric connection box 10 is formed by punching a conductive metal plate. In the case of the second embodiment constituted by the bus bar, the electric wire 15 of the external circuit is connected without a connector as shown in FIGS.

FIG. 5A shows an external terminal portion 30a formed of a horizontal flat plate portion formed on a part of the bus bar 30.
Further, the core wire 19 exposed from the end of the electric wire 15 of the external circuit is welded and connected by solder 33, ultrasonic welding, electric resistance welding, or the like. FIG. 5B shows the horizontal bus bar 3
A part of 0 is bent in the vertical direction to form a tab-shaped external terminal connecting portion 30a, a slot 30b is formed from the upper end of the tab terminal connecting portion 30a, and a press contact blade 30c is formed on the inner peripheral edge thereof.
Is formed. Connect the electric wire 15 of the external circuit to the bus bar 3
The pressure contact blade 30c of 0 is used for pressure contact connection, so that the electric wire 15 and the bus bar 30 are connected without a connector.

In the third embodiment shown in FIG. 6, the electric junction boxes 10A and 10B composed of two junction boxes are connected by a trunk line of a wire harness W / H in a connectorless manner. Electric wire 1 that constitutes the wire harness W / H
5 uses the electric wire which comprises the internal circuit of one electric connection box 10A by directly drawing it out from the electric wire insertion port provided in the upper case 13. That is, the electric wire 15 of the external circuit forming the wire harness is used as it is without cutting the electric wire of the internal circuit of the one electric connection box. These electric wires 15 are the electric wires 1 of the internal circuit of the other electric junction box 10B.
1 and the above-described modes shown in FIGS. 1 to 5, they are directly connected without a connector.

[0031]

As is apparent from the above description, according to the connection structure of claim 1 of the present invention, the constituent electric wires of the wire harness are not connected to the electric wire of the internal circuit of the electric junction box or the bus bar and the connector. Since it is connected to the terminal, a terminal fitting such as a crimp terminal or a pressure contact terminal and a connector for accommodating these terminals, which have been conventionally required, are unnecessary, and the number of connecting parts can be reduced or can be completely eliminated. Also,
Since it is not a connector connection, it is not necessary to form a connector accommodating portion in the electric connection box, the electric connection box can be downsized, and the installation space can be reduced. Further, in the wire harness manufacturing process, it is possible to eliminate the work of connecting the terminals to the respective electric wires forming the wire harness, accommodating these terminals in the connector, and fitting these connectors into the electric connection box. In this way, by reducing the number of parts and the work process, it is possible to significantly reduce the cost as compared with the conventional one.

According to the connection structure of claims 2 and 3, when the conductor forming the internal circuit of the electric junction box is an electric wire, a connectorless connection can be easily made with the electric wires forming the wire harness. Further, according to the connection structure of claims 4 and 5, when the conductor forming the internal circuit of the electric connection box is formed of a bus bar, it is possible to easily perform connectorless connection with the constituent wires of the wire harness.

Further, according to the connection structure of the sixth aspect, it is possible to easily connect the electric connection boxes connected to each other on the circuit. Further, according to the connection structure of claim 7, it is not necessary to branch the branch line from the main line of the wire harness, and it is possible to eliminate the splice connection of the electric wire which is often used in the conventional wire harness.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 is a view taken in the direction of the arrow II in FIG.

FIG. 3A is a plan view of a main part of the first embodiment,
(B) is a front view of a main part, and (C) is a front view of a connection part of an electric wire.

4 (A), (B) and (C) are perspective views showing a connection mode between an electric wire of an internal circuit of an electric connection box and a constituent electric wire of a wire harness.

5 (A) and 5 (B) are perspective views showing a connection mode between a bus bar of an internal circuit of an electric connection box of a second embodiment and constituent electric wires of a wire harness.

FIG. 6 is an exploded perspective view of a third embodiment.

FIG. 7 is a perspective view of a conventional example.

[Explanation of symbols]

 10, 10A, 10B Electrical connection box 11 Internal circuit wire 12 Pressure contact terminal 13 Upper case 14 Lower case 15 External circuit wire 16 Wire insertion port 17 Partition wall 20A, 20B, 20C Pressure contact terminal 30 Busbar W / H wire harness

Claims (7)

[Claims] 1. A connection structure of a conductor forming an internal circuit of an electric connection box and an electric wire of an external circuit forming a wire harness, wherein the electric wire of the external circuit is opened in a case of the electric connection box. A connection structure of an electric connection box, which is inserted into the case through an insertion port, and the core wire of the electric wire of the external circuit and the conductor of the internal circuit are connected via welding or pressure contact terminals. 2. The connection structure for an electric connection box according to claim 1, wherein the conductor forming the internal circuit of the electric connection box is an electric wire, and the electric wire is connected to the electric wire of the external circuit via a pressure contact terminal. 3. A conductor forming an internal circuit of the electric connection box is an electric wire, and core wires exposed from both ends of the electric wire of the internal circuit and the electric wire of the external circuit are welded and connected to each other. The connection structure for an electrical junction box according to claim 1. 4. The connection of the electric connection box according to claim 1, wherein the conductor forming the internal circuit of the electric connection box is a bus bar, and the conductor is welded to the core wire of the electric wire of the external circuit exposed from the terminal. Construction. 5. A conductor forming an internal circuit of the electric connection box is a bus bar, and an electric wire of the external circuit is press-connected to an external terminal portion having a press-contact blade formed on the bus bar. The connection structure of the electrical junction box described in. 6. An electric wire forming an internal circuit of an electric connection box is drawn out from an electric wire insertion port provided in a case of the electric connection box, and a case is obtained from an electric wire insertion port provided in a case of another electric connection box. A connection structure of an electric connection box which is inserted inside and is connected to an electric wire or a bus bar which constitutes an internal circuit of the other electric connection box by pressure contact terminals or welding. 7. The electric wire of the external circuit comprises an electric wire group of a main wire of a wire harness, and each electric wire of the electric wire group is inserted from an electric wire insertion port provided side by side in the electric connection box to obtain a desired internal circuit. The connection structure for an electrical connection box according to claim 1, wherein the connection structure is connected to a conductor.