JPH097652A - Wire connecting structure in electric junction box - Google Patents

Abstract

PURPOSE: To eliminate the connection through a connector and directly connect the internal circuit of an electric junction box to the wire of a wire harness only through a pressure contact terminal. CONSTITUTION: This wire connecting structure is to connect a wire 11 constituting the internal circuit of an electric junction box 10 to the wire 15 of an external circuit constituting a wire harness W/H. The case 13 of the electric junction box 10 has a wire insert hole 16 for inserting the wire 15 of the external circuit into the case, and also has, in a proper position of the inner part, a pressure contact terminal 19 for connecting inner and outer wires which integrally has an external wire pressure contact edge 19a to be pressed onto the wire 15 of the external circuit and an internal wire pressure contact edge 19b to be pressure-contacted onto the wire 11 of the internal circuit, and also integrally has an external terminal connecting tub 19e protruded outward from the case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire connection structure in an electric connection box, and more specifically, a connector for connecting an electric wire which is an internal circuit of an electric connection box such as a junction box and an electric wire which constitutes a wire harness of an external circuit. It connects without.

[0002]

2. Description of the Related Art Conventionally, when an electric wire is used as an internal circuit of an electric connection box such as a junction box, and an electric wire which constitutes a wire harness serving as an external circuit is connected to the internal circuit, a tab is provided on the electric wire of the internal circuit. The press-connecting terminals are connected, and the tabs of the press-connecting terminals are provided in a protruding manner in a connector accommodating portion provided on the outer surface of the case of the electric connection box. On the other hand, on the external circuit side, as shown in FIG. 5, the main wire 2 of the wire harness W / H is branched, crimp terminals are respectively connected to the ends of the respective wires of the branched branch line 3, and these crimp terminals are connected to the connector 4 , The connectors 4 are fitted into the connector housings of the electric junction boxes 1A and 1B, and the tabs projected into the connector housings are fitted with the crimp terminals housed in the connectors, so that the electric wires of the internal circuit are And the electric wire of the external circuit are connected.

As described above, conventionally, terminals are connected to the terminals of each electric wire forming the wire harness, the terminals are accommodated in the connector, and the terminals are connected to the internal circuit of the electric junction box through the connector.

[0004]

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 junction 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 wires forming the wire harness, it is necessary to connect terminals to the terminals of each wire and store these terminals in a connector, which requires a lot of work and required parts (terminals). , Connectors) and the cost increased.

The present invention has been made to solve the above problems, and eliminates the connection through a connector, and directly connects the electric wire forming the internal circuit of the electric connection box and the electric wire forming the wire harness by only the pressure contact terminals. Thus, while aiming at downsizing and simplification of the shape of the electric junction box, it is intended to eliminate the work of mounting the terminal on the electric wire side and the work of housing the connector and to reduce the number of parts.

[0007]

In order to achieve the above-mentioned object, the present invention according to claim 1 provides an electric wire insertion port in a case of an electric connection box, and through the electric wire insertion port, a case of an electric wire of an external circuit is provided. While extending to the inside, the wire to be the internal circuit for wiring inside the case is pressure-contacted with a pressure-contact terminal having a tab for connecting to a connector that fits into a connector housing provided on the outer surface of the case. An electric wire connection structure is provided in an electric connection box in which an electric wire of an external circuit extending inside the case is pressure-connected by an attached press-contact blade to connect the internal electric wire and the external electric wire.

The pressure contact terminal for connecting the inner and outer electric wires, which has the above-mentioned tab and has a pressure contact blade for press-contacting the inner electric wire and the outer electric wire, includes an external circuit electric wire whose core wire is a stranded wire and two positions in the length direction of the electric wire. With two pressure contact blades for pressure contact,
It is preferable to provide one pressure contact blade that is in pressure contact with the internal circuit electric wire made of a single core wire, and to provide a total of three pressure contact blades. (Claim 2) The pressure contact blade with the external circuit wire is not always 2
There is no need to provide one.

The pressure contact terminal for connecting the inner and outer wires, which has the tab and the three pressure contact blades, is used as a pressure contact terminal to be mounted at a position closest to the external circuit wire to be inserted into the case. Therefore, the connection position between the external circuit and the internal circuit differs depending on each electric wire.

The wire harness of the external circuit, which is connected to the internal circuit of the electric connection box without a connector, is a wire harness which is connected to the electric connection box before the wiring to the vehicle body. The wire harness of the external circuit, in which the connector is mounted and connected to the connector accommodating portion provided in, is a wire harness that is connected to the electric connection box after being routed to the vehicle body.

[0011]

According to the present invention, the electric wire of the external circuit forming the wire harness for connecting to the electric connection box before the wiring to the vehicle body of the automobile is formed with the electric wire insertion port opened on the side surface of the case of the electric connection box. Insert it inside the case and extend it inside the case. On the other hand, an electric wire wired as an internal circuit of the electric connection box is pressure-connected with a pressure-contact terminal provided with a tab protruding from a connector accommodating portion provided on the outer surface of the case. Among the press contact terminals that press contact with the electric wires of the internal circuit, the press contact terminals for connecting the internal and external electric wires are used as the press contact terminals that are attached at the positions closest to the electric wires that are inserted into the case. That is, the press contact blade of the press contact terminal is cut into the internal circuit wire and the external circuit wire, respectively, and the press contact blade is brought into contact with the core wire, thereby connecting the internal wire and the external wire through the press contact terminal.

As described above, since the electric wire of the external circuit and the electric wire of the internal circuit are connected through the pressure contact terminal for connecting the internal and external electric wires, which is provided at a proper position in the case for connecting the internal circuit and the connector, Connectorless coupling, that is, connection can be made without a connector. Therefore, it is possible to eliminate the need for attaching the terminals to the electric wires of the wire harness, accommodating the terminals in the connector, and fitting the connector into the connector accommodating portion of the electric junction box, which is conventionally required. In addition, there is no trouble caused by poor fitting or forgetting to fit the connector.

In addition, the pressure contact terminal for connecting the internal and external electric wires,
The core wire of the electric wire forming the internal circuit of the electric connection box and the core wire of the electric wire of the external circuit can be extremely easily connected without a connector. In addition, the pressure contact terminal for connecting the internal and external wires,
It is used as a pressure contact terminal attached to the position closest to the insertion position of the external circuit wire in order to shorten the extension amount of the external circuit wire in the case of the electrical junction box, but is not limited to the pressure contact terminal closest to the insertion position. . The pressure contact terminal for connecting the internal and external electric wires may be used at an arbitrary position convenient for connecting the internal and external electric wires due to the space inside the case.

On the other hand, when the core wire of the external electric wire is a flexible stranded wire as in claim 2, by forming two external electric wire press contact blades of the internal and external electric wire connecting press contact terminals, The contact can be made more reliably.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the illustrated embodiments. As shown in FIG. 1A, the internal circuit of the electric junction box 10 including a junction box is composed of an internal electric wire 11 and a pressure contact terminal 12. That is, the internal 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,
A pressure contact terminal 12 is driven into the internal electric wire 11 at a position as shown in FIG. These pressure contact terminals 12
Is a tab 12a for connecting an external terminal in order to connect with a connector, a relay, a fuse, etc. mounted on the electric connection box 10.
Are projected from the terminal holes formed on the upper surface side of the upper case 13 and the connector accommodating portion 13a, the relay, and the fuse accommodating portion so as to be connected to the external terminals.

Thus, the internal electric wire 11 and the pressure contact terminal 1 are
After forming the internal circuit by 2 and connecting the external electric wire 15 and the internal electric wire 11 of the wire harness W / H described later, the lower case 14 is combined with the upper case 13 to form the electric junction box 10. .

The upper case 13 of the electric junction box 10
An electric wire insertion port 16 for inserting the external electric wires 15 constituting the wire harness W / H in parallel is formed on one side wall of the electric wire. As shown in FIG. 2, these electric wire insertion openings 16 are provided with a plurality of partition walls 17 with a certain pitch in the horizontal direction and extending in the vertical direction, and the external electric wires 15 are provided between adjacent partition walls 17. The outer diameter is approximately equal to the outer diameter. On the side surface of the partition wall 17 in contact with the external electric wire 15,
Although not specifically shown, the pressing portions projecting in a substantially trapezoidal cross section are provided so as to face each other, and the pressing portions press the opposing outer peripheral side surfaces of the external electric wires 15 to prevent the external electric wires 15 from coming off. . Further, an arcuate concave portion is formed in a portion corresponding to the bottom surface of the electric wire insertion opening between the partition walls 17, so that the external electric wire 1
The bottom side of 5 is fitted so as to hold it stably.

All the external electric wires 15 constituting the wire harness W / H are inserted into the electric wire insertion ports 16 of the electric connection box 10 to locate the ends of the external electric wires 15 inside the electric connection box 10.

The core wire of the external electric wire 15 is a stranded wire,
The core wire of the internal electric wire 11 wired inside the case is a single core wire. The external electric wire 15 and the internal electric wire 11 are connected to each other by a pressure contact terminal 19 for connecting an internal and external electric wire.

As shown in detail in FIGS. 2 and 3, the press-connecting terminal 19 for connecting the internal and external electric wires is cut into the external electric wire 15 and presses the external wire to press-contact the external wire 15a, 19a.
And an internal electric wire press contact blade 19b which is cut into the internal electric wire 11 and press-contacts with the core wire are integrally connected by a side surface connecting portion 19c. Further, two external electric wire press contact blades 19a, 19a are formed on the front and rear in the length direction of the core wire, and the front and rear external electric wire press contact blades 19a, 19a are integrally connected by a lower surface connecting portion 19d.

From the lower end of the internal wire pressure contact blade 19b, like the other pressure contact terminals 12 dedicated to the internal wire, the electric connection box 1
A tab 19e for connecting an external terminal is integrally provided at 0.

The pressure contact terminal 19 for connecting the internal and external electric wires is at an arbitrary position as shown in FIG. 1A by (b), that is, at a position convenient for connecting the internal electric wire 11 and the external electric wire 15. Moreover, the tab 19e is attached to a position where the tab 19e is inserted into one of the terminal holes provided in the upper case 13.
In order to minimize the wiring amount of the external electric wire 15 inside the case, it is preferable to use the pressure contact terminal 19 for connecting the internal and external electric wires as the pressure contact terminal at the position closest to the wire insertion port 16.

The tab 19e of the pressure contact terminal 19 for connecting the internal and external electric wires is, like the tab 12a of the other pressure contact terminal 12, a connector accommodating portion 1 formed on the upper surface side of the upper case 13.
It is made to project from the terminal hole on the bottom surface of 3a to be connected to the connector. Needless to say, it may be projected from the terminal holes of the relay and the fuse accommodating portion.

As shown in FIGS. 3A and 3B, the pressure contact terminal 19 for connecting the inner and outer wires is arranged with respect to the pressure contact terminal 12 as shown in FIG. By press-contacting with the external wire press-contact blades 19a, 19a and press-contacting the internal wire 11 with the internal wire press-contact blade 19b,
The external electric wire 15 and the internal electric wire 11 are connected.

As described above, after connecting the internal electric wire 11 of the electric junction box 10 and the external electric wire 15 of the wire harness W / H with the pressure contact terminals 19 for connecting the internal and external electric wires, the electric junction box 1
The lower case 14 is assembled to the 0 upper case 13.

In the connection structure of the electric connection box 10 and the wire harness W / H described above, the electric connection box 10 is installed before the vehicle body is laid.
The external electric wire 15 forming the wire harness W / H connected to the electric wire can be connected to the internal electric wire 11 of the internal circuit of the electric junction box 10 without a connector. Therefore, it is possible to eliminate the work of attaching terminals to the external electric wires 15 of the wire harness W / H, accommodating these terminals in the connector, and fitting the connector into the connector accommodating portion of the electric junction box 10 as in the conventional art. . Moreover, since the connector accommodating portion provided in the electrical junction box 10 can be reduced, the electrical junction box 1
It is possible to reduce the size and simplification.

Further, the press-connecting terminal 19 for connecting the internal and external electric wires makes it possible to connect the internal electric wire 11 of the electric junction box 10 and the external electric wire 15 of the wire harness W / H with a very simple connectorless operation. The pressure contact terminal 19 for connecting the inside and outside wires can be provided at any convenient position for connection by utilizing one of the terminal holes provided in the upper case 13 of the electric connection box 10.
The degree of freedom of the connection positions of 1 and 15 is improved.

FIG. 4 shows two electrical junction boxes 10A and 10B.
Is an example in which the external electric wires 15 of the wire harness W / H are connected without a connector. In this case, connect both ends of the external electric wire 15 of the wire harness W / H to the electric connection boxes 10A,
In addition to connecting the internal electric wires 11 of 11B and the pressure contact terminals 19 for connecting the internal and external electric wires, for example, the internal electric wire 11 of the electric connection box 10B on the right side is pulled out directly from the electric wire insertion port of the upper case 13 to the outside. Wire harness W
/ H, and the external wire 15 of this wire harness W / H
Can be connected to the internal electric wire 11 of the electric connection box 10A on the left side with the pressure contact terminal 19 for connecting the internal and external electric wires.

[0029]

As is apparent from the above description, the electric wire connection structure of the electric connection box of the present invention has the electric wire of the external circuit of the wire harness and the electric wire of the internal circuit of the electric connection box in proper positions in the case. Since the connection is made via the provided pressure contact terminal for connecting the internal and external electric wires, the connection can be made by connectorless coupling. Therefore, attach terminals to each wire of the wire harness, house these terminals in the connector,
All the work such as fitting the connector into the connector housing part of the electrical junction box is unnecessary, and there is no trouble caused by poor fitting or forgetting to fit the connector.
Since it is not necessary to provide a connector housing in the electrical junction box,
The electric junction box can be downsized and simplified.

In addition, the pressure contact terminal for connecting the internal and external electric wires,
The electric wires that form the internal circuit of the electric junction box and the electric wires of the external circuit can be connected very easily with one touch, and the press-connecting terminals for connecting the internal and external electric wires are provided on the case of the electric junction box. Since it can be provided at any position convenient for connection by utilizing one of the terminal holes, the degree of freedom of connection position of both core wires is improved. Further, as the press-connecting terminal for connecting the internal and external electric wires, a press-connecting terminal having a tab for press-contacting the internal circuit electric wire has been used conventionally, so it is not necessary to separately provide a press-connecting terminal for connecting the internal and external electric wires, The number of pressure contact terminals can be reduced and the number of mounting steps can be reduced.

Furthermore, when the core wire of the external electric wire is a stranded wire, the external electric wire press-connecting blade of the press-connecting terminal for connecting the internal and external circuits is formed in two steps, so that the contact with the stranded wire should be ensured. You can

[Brief description of drawings]

FIG. 1A is an exploded perspective view of an electric junction box of the present invention,
(B) is a side view of a main part of the electrical junction box.

FIG. 2 is a side sectional view of a pressure contact terminal for connecting an inner and outer electric wire.

3A and 3B are perspective views of an arrangement example of pressure contact terminals for connecting an inner and outer electric wires.

FIG. 4 is a perspective view of a modified example of the connection structure.

FIG. 5 is a perspective view of a connection structure of a conventional electric junction box.

[Explanation of symbols]

 10 Electric Junction Box 11 Internal Wire 12 Pressure Contact Terminal 13 Upper Case 14 Lower Case 15 External Wire 16 Wire Insertion Port 19 Pressure Contact Terminal for Connecting Inner and Outer Electric Wire 19a External Wire Pressure Contact Blade 19b Inner Wire Pressure Contact Blade 19c, 19d Connecting Portion 19e Tab W / H Wire Harness

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Miya ▲ Saki ▼ Junyuki 1-14 Nishisuehiro-cho, Yokkaichi-shi, Mie Sumitomo Wiring Systems, Ltd. (72) Inventor Hiroshi Murakami 1 Nishisuehiro-cho, Yokkaichi-shi, Mie No. 14 within Sumitomo Wiring Systems, Ltd.

Claims (2)

[Claims] 1. An electric connection box is provided with an electric wire insertion port, and an electric wire of an external circuit is inserted into the case through the electric wire insertion port, while an electric wire to be an internal circuit to be wired inside the case is provided on an outer surface of the case. And press-connecting the press-connecting terminal equipped with a tab for connecting with the connector that fits in the connector housing,
An electric wire connection structure in an electric connection box in which an external electric wire inserted into the case is pressed by a pressing blade attached to the pressing terminal to connect the internal electric wire and the external electric wire. 2. A pressure contact terminal for connecting an inner and outer electric wire, which has the tab and has a pressure contact blade for press-contacting the inner electric wire and the outer electric wire, includes an external circuit electric wire whose core wire is a stranded wire, and an outer circuit electric wire in a longitudinal direction of the electric wire. The electric wire connection in the electric connection box according to claim 1, further comprising: two press-contact blades press-contacted at one place, one press-contact blade press-contacted with the internal circuit electric wire made of a single core wire, and a total of three press-contact blades provided. Construction.