JP3239688B2 - Wire connection structure in electrical junction box - Google Patents

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 particularly, to a connector for connecting an electric wire forming an internal circuit of an electric connection box such as a junction box and an electric wire forming 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 a wire constituting a wire harness to be an external circuit is connected to the electric circuit, a tab is provided on the electric wire of the internal circuit. The press contact terminals are connected, and tabs of the press contact terminals are protruded from 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 line 2 of the wire harness W / H is branched, and crimp terminals are respectively connected to the ends of the respective wires of the branched branch lines 3. And the connectors 4 are fitted into the connector housings of the electric connection boxes 1A and 1B, and the tabs protruding from the connector housings are fitted with the crimp terminals housed in the connectors, thereby forming the electric wires of the internal circuit. And the wires of the external circuit.

[0003] As described above, conventionally, terminals are connected to the terminals of the electric wires constituting the wire harness, these terminals are housed in the connector, and connected to the internal circuit of the electric connection box via the connector.

[0004]

As described above, since the electric connection box and the wire harness are all connected by connectors, the electric connection box must be provided with a connector accommodating portion, and a large number of connectors are required. In an electric connection box such as a junction box connected to a power supply, a large number of connector housings must be provided, and thus there is a problem that the size of the junction box is increased and the shape is complicated.

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

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and the electric wires connected to the junction box before being mounted on the vehicle body are connected without using a connector. In addition to directly connecting the electric wires that compose the cable only by crimping terminals to reduce the size and simplification of the shape of the electric junction box, the work of mounting terminals on the electric wire side and the work of housing connectors are reduced, and the number of parts is reduced. The purpose is to plan.

[0007]

In order to achieve the above-mentioned object, the present invention provides a connector of a terminal of a group of wires of a wire harness to be connected after the vehicle body is attached to an outer surface of a case of an electric junction box comprising a junction box. And a wire insertion port on the side surface of the case, and a wire of an external circuit for connecting the junction box before mounting the vehicle body is extended inside the case through the wire insertion port, while being wired inside the case. A press contact terminal provided with a tab for connecting to an external terminal in a connector fitted to the connector accommodating portion is connected to an electric wire serving as an internal circuit by press contact, and is extended inside the case by a press contact blade attached to the press contact terminal. And press-connects the wires of the external circuit. The connection between the inner and outer wires and the terminal of the connector fitted into the connector accommodating portion by the one press-connecting terminal. It provides a wire connection structure in an electrical connection box, characterized in that performing continued.

The press-connecting terminal for connecting the inside and outside electric wires having the above-mentioned tab and having press-contact blades for press-contacting the internal electric wire and the external electric wire is provided at two places in the length direction of the external circuit electric wire having a stranded core wire and an external circuit electric wire. With two press-contact blades for pressing,
It is preferable to provide one press contact blade for press contact with the internal circuit electric wire composed of a single core wire, and it is preferable to provide a total of three press contact blades. (Claim 2) In addition, the pressure contact blade with the external circuit wire is not necessarily 2
There is no need to provide one.

The press contact terminal for connecting the inside and outside electric wires having the tab and the three press contact blades is used as a press contact terminal attached to a position closest to an external circuit wire inserted into the case. Therefore, the connection position between the external circuit and the internal circuit differs for each electric wire.

[0010] The wire harness of the external circuit connected to the internal circuit of the electric connection box without a connector is a wire harness connected to the electric connection box before wiring to the vehicle body. The wire harness of the external circuit for connecting and connecting the connector to the connector accommodating portion provided in the vehicle 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, an electric wire of an external circuit constituting a wire harness connected to an electric connection box before wiring to a car body of an automobile is connected to an electric wire insertion opening opened on a side surface of a case of the electric connection box. It is inserted more inside the case and extended inside the case. On the other hand, an electric wire wired as an internal circuit of the electric connection box is press-connected to a press-connecting terminal provided with a tab projecting from a connector accommodating portion provided on the outer surface of the case. Among the press contact terminals that press against the wires of the internal circuit, a press contact terminal for connecting internal and external wires is used as a press contact terminal attached to a position closest to the wire 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 via the press contact terminal.

As described above, since the electric wires of the external circuit and the electric wires of the internal circuit are connected via the press-connecting terminals for connecting the internal and external electric wires provided at appropriate places in the case for connecting the internal circuit and the connector, Connectorless connection, that is, connection can be made without a connector. Therefore, it is not necessary to attach the terminals to the wires of the wire harness and to accommodate the terminals in the connector and to fit the connector into the connector accommodating portion of the electric connection box. Further, there is no trouble caused by poor fitting of the connector or forgetting to fit.

[0013] In addition, the press-connecting terminal for connecting the inner and outer wires,
The connector-less connection between the core wire of the electric wire constituting the internal circuit of the electric connection box and the core wire of the electric wire of the external circuit can be made extremely easily. In addition, the insulation displacement terminals for connecting internal and external electric wires are
In order to shorten the amount of extension of the external circuit wires in the case of the electrical junction box, they are used as pressure contact terminals attached to the position closest to the insertion position of the external circuit wires, but are not limited to the pressure contact terminals closest to the insertion position. . The press-connecting terminal for connecting the inner and outer wires may be used at an arbitrary position convenient for connection of the inner and outer wires due to the space and the like inside the case.

On the other hand, when the core wire of the external electric wire is a flexible stranded wire as described in claim 2, the external electric wire press-connecting blade of the internal-external electric wire connection press-connecting terminal is formed in front and rear to form a stranded wire. Contact can be made more reliably.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. As shown in FIG. 1A, an internal circuit of an electric connection box 10 composed of a junction box includes an internal electric wire 11 and a press contact terminal 12. That is, on the lower surface of the upper case 13 of the electric connection box 10, the internal electric wires 11 are laid in a state where the upper case 13 is turned upside down,
A press contact terminal 12 is driven into the internal electric wire 11 at a position as shown in FIG. These press contact terminals 12
Tabs 12a for connecting external terminals to connect to connectors, relays, fuses, etc. mounted on the electrical junction box 10.
Are projected from terminal holes on the bottom surface of the connector housing 13a and the relay and fuse housings formed on the upper surface side of the upper case 13 so as to be connected to external terminals.

As described above, the internal electric wire 11 and the pressure contact terminal 1
After forming the internal circuit by the second 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 connection box 10. .

The upper case 13 of the electric connection box 10
On one side wall, an electric wire insertion port 16 through which the external electric wire 15 constituting the wire harness W / H is inserted in parallel is formed in parallel. As shown in FIG. 2, these electric wire insertion ports 16 are provided with a plurality of partition walls 17 extending at a constant pitch in the horizontal direction and extending in the vertical direction, and external electric wires 15 are provided between adjacent partition walls 17. The dimensions are approximately equal to the outer diameter of. On the side surface of the partition wall 17 in contact with the external electric wire 15,
Although not specifically shown, pressing portions protruding in a substantially trapezoidal cross section are provided to face each other, and the pressing outer portions of the external wires 15 are pressed by the pressing portions to prevent the external wires 15 from coming off. . Further, an arc-shaped concave portion is formed at a portion corresponding to the bottom surface of the electric wire insertion port between the partition walls 17, and the external electric wire 1 is formed.
The bottom surface side of 5 is fitted and stably held.

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, and the terminals of the external electric wires 15 are located inside the electric connection box 10.

The core wire of the external electric wire 15 is made of 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 by a press contact terminal 19 for connecting the internal and external electric wires.

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

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

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

The tab 19e of the press-connecting terminal 19 for connecting the inner and outer electric wires, like the tab 12a of the other press-connecting terminal 12, has the connector housing 1 formed on the upper surface of the upper case 13.
The terminal 3a protrudes from the terminal hole on the bottom surface and is connected to the connector. It goes without saying that it may be made to protrude from the terminal holes of the relay and the fuse accommodating portion.

As shown in FIGS. 3A and 3B, the press contact terminals 19 for connecting the inner and outer electric wires are arranged as shown in FIG. By pressing the internal wires 11 with the internal wire pressing blades 19b while pressing with the external wire pressing blades 19a, 19a,
The external electric wire 15 and the internal electric wire 11 are connected.

As described above, after the inner electric wire 11 of the electric connection box 10 and the outer electric wire 15 of the wire harness W / H are connected by the press contact terminal 19 for connecting the inner and outer electric wires, the electric connection box 1 is connected.
The lower case 14 is assembled to the 0 upper case 13.

In the connection structure between the electric connection box 10 and the wire harness W / H, the electric connection box 10
The external electric wire 15 constituting the wire harness W / H connected to the electric connection box 10 can be connected to the internal electric wire 11 of the internal circuit of the electric connection box 10 without a connector. Therefore, it is not necessary to attach the terminals to the external electric wires 15 of the wire harness W / H, accommodate the terminals in the connector, and fit the connector to the connector accommodating portion of the electric connection box 10 as in the related art. . Further, since the number of connector housings provided in the electric connection box 10 can be reduced, the electric connection box 1
0 can be reduced in size and simplified.

Further, the press-connecting terminal 19 for connecting the inner and outer wires allows the inner wire 11 of the electric connection box 10 and the outer wire 15 of the wire harness W / H to be connected very easily with one touch without a connector. The press contact terminal 19 for connecting the inner and outer wires can be provided at any convenient position for connection by using 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 1 and 15 is improved.

FIG. 4 shows two electric connection boxes 10A and 10B.
This is an embodiment in which the connector is connected without a connector by the external electric wire 15 of the wire harness W / H. In this case, both ends of the external electric wire 15 of the wire harness W / H are connected to each electric connection box 10A,
In addition to connecting the internal electric wires 11 and 11 of the electric connection box 10B with the press contact terminals 19 for connecting the internal and external electric wires, for example, the internal electric wire 11 of the right electric connection box 10B is directly drawn out from the electric wire insertion opening of the upper case 13 to the outside. Wire harness W
/ H, and the external electric wire 15 of this wire harness W / H
Can be connected to the inner electric wire 11 of the left electric connection box 10A by the press-connecting terminal 19 for connecting the inner and outer electric wires.

[0029]

As is apparent from the above description, the electric wire connection structure of the electric junction box of the present invention is such that the electric wire of the external circuit of the wire harness and the electric wire of the internal circuit of the electric junction box are put in place in the case. Since the connection is made via the provided pressure contact terminals for connecting the inside and outside electric wires, the connection can be made by connectorless connection. Therefore, terminals can be attached to each wire of the wire harness, these terminals can be stored in the connector,
All the work of fitting the connector to the connector housing of the electrical connection box can be eliminated, and there is no trouble due to poor fitting or forgetting to fit the connector.
Since there is no need to provide a connector housing in the electrical junction box,
Also, the size and simplification of the electric junction box can be improved.

Further, the press contact terminals for connecting the inner and outer wires,
The wires that make up the internal circuit of the electrical junction box and the wires of the external circuit can be connected very easily with one touch without a connector, and the press contact terminals for connecting the inner and outer wires are provided in a large number on the case of the electrical junction box. By using one of the terminal holes described above, it can be provided at any position convenient for connection, so that the degree of freedom of the connection position of the two core wires is improved. Furthermore, since the press contact terminal having a tab for press contact with the internal circuit wire is conventionally used as the press contact terminal for connecting the internal and external electric wires, it is not necessary to separately provide the press contact terminal for connecting the internal and external electric wires. In addition, 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 stages in front and rear, so that the contact with the stranded wire is ensured. Can be.

[Brief description of the 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 electric junction box.

FIG. 2 is a side sectional view of a press-connecting terminal for connecting internal and external electric wires.

FIGS. 3A and 3B are perspective views of an example of arrangement of press-connecting terminals for connecting internal and external electric wires.

FIG. 4 is a perspective view of a modification of the connection structure.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electrical connection box 11 Internal electric wire 12 Pressure contact terminal 13 Upper case 14 Lower case 15 External electric wire 16 Electric wire insertion port 19 Internal / external electric wire connection press contact terminal 19a External electric wire pressure contact blade 19b Internal electric wire pressure contact blade 19c, 19d Connection part 19e Tab W / H Wire Harness

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Miya ▲ Saki ▼ Junyuki 1-14 Nishisuehiro-cho, Yokkaichi-shi, Mie Inside Sumitomo Wiring Systems Co., Ltd. No. 14 Sumitomo Wiring Systems, Ltd. (56) References JP-A-61-45575 (JP, A) JP-A-57-140081 (JP, U) JP-A-4-55760 (JP, U) JP-A-5 15466 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01R 4/24 H01R 9/03 H02G 3/16

Claims (2)

(57) [Claims] (1)Electrical connection consisting of junction box
Connect the wire harness to the outer surface of the
Connector housing to fit the connector of the terminal of the wire group of Ness
And a wire insertion port on the side of the case.
External circuit to connect junction box before mounting on vehicle body
Of the wire through the wire insertion hole and into the case
While Connect the above-mentioned wires to the internal circuit
Connects to external terminals in the connector that fits into the connector housing
Press-connecting a press-fit terminal with tabs
The outside extended inside the case by the attached pressure contact blade
Press-connect the wires of the circuit, Connection of internal and external electric wires by one press contact terminal and connector
Connection with the terminal of the connector that fits into the housing
Characterized by Wire connection structure in electrical junction box. 2. A press-connecting terminal for connecting an internal / external wire having the tab and a press-contact blade for press-contacting an internal wire and an external wire, comprising: an external circuit wire having a stranded core; 2. The electric connection box according to claim 1, further comprising: two press-contact blades press-contacted at different locations, one press-contact blade press-contact with an internal circuit wire made of a single core wire, and a total of three press-contact blades. 3. Construction.