JP2962168B2 - External circuit joint terminal used for 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 a terminal for an external circuit joint used in an electric connection box, and more particularly, to an electric circuit in which an internal circuit of the electric connection box is formed by an electric wire and a press contact terminal for press-contacting the electric wire. In the connector formed on the outer surface of the electrical junction box, without the need to connect to the wires of the internal circuit,
When a return joint is required by connecting external circuits, another joint connector is not required.

[0002]

2. Description of the Related Art An electrical junction box used for branch connection of an automobile wire harness or the like to various electric components has a branch connection point concentrated at one place, and the wiring is rationally and economically connected. With the increase in the density of wire harnesses, various types have been developed according to vehicle types or applications.

[0003] In an electric connection box as described above, in which an internal circuit is formed by an electric wire and a press contact terminal for press-contacting the electric wire, a wire harness W / arranged on the upper surface of a lower case 1 as shown in FIG. , 3 arranged on the lower surface of the upper case 2 are pushed into the electric wires a, b,.
The sheath of the electric wires a,... Is cut off, and the press-contact blade 3a and the electric wires a,.
May be electrically contacted with the core wire. As described above, the press-contact blade 3a of each press-contact terminal 3 has a function of cutting off the coating of the electric wires a,. It also has functions.

[0004]

In the above-mentioned electric junction box, external circuits are connected to each other without being connected to an internal circuit in a connector portion provided on the outer surface of the case. 3 cannot be used because it is connected to the electric wire by the press contact blade 3a. Therefore, as shown in FIG. 4, a separate joint connector 5 into which a bus bar 4 provided with a short pin 4a connected to each terminal is inserted. Needed to use. That is, a crimp terminal (not shown) is connected to the terminal of the electric wire w connected to the connector fitted to the connector part of the electric connection box, and the crimp terminal is inserted into the terminal accommodating chamber of the joint connector 5, and The external terminals are connected to each other by connecting to the pin 4a.

As described above, since it is necessary to separately provide the joint connector 5, there is a problem that it takes time to assemble the joint connector, and a space is required for providing the joint connector.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. In the case where a folded joint in a connector portion provided in an electric connection box is required, a separate joint connector can be dispensed with. It is an object of the present invention to provide a terminal for an external circuit joint to be used.

[0007]

In order to achieve the above object, according to the present invention, there is provided an electric connection box, wherein an electric circuit and a press contact terminal pressed against the electric wire are used in an internal circuit of the electric connection box. A terminal used to join an external circuit in an electrical connection box that connects the external circuit to the external circuit and connects the external circuit to the internal circuit wire. Outer fitting grooves fitted to the outer periphery of the covering are provided between both side legs, and these legs are supported and attached to the inner surface of the case of the electric connection box or an insulating plate arranged inside the case, and are opposite to the legs. A plurality of tabs are protruded to the side, and the plurality of tabs are connected to an external circuit to provide an external circuit joint terminal used for an electric connection box that can connect an external circuit without passing through wires of the internal circuit. .

In the terminal, a rectangular frame portion is provided at a lower portion of an upper portion from which a plurality of tabs protrude, and support portions provided with external fitting grooves between both side leg portions are provided on opposite sides thereof. preferable. (Claim 2)

[0009]

According to the present invention, the press contact blade of the press contact terminal which requires contact with the core wire of the electric wire of the wire harness is provided in the same manner as in the prior art.
If the insulation coating of the electric wire is formed in the shape of tearing, and if a folded joint in the same connector is required, use a joint connector separately by using a terminal with an external fitting groove that does not contact the core wire of the electric wire Not
A folded joint of an external circuit can be performed. Since the terminal is simply formed in the groove by removing the blade portion of the pressure contact terminal having the conventional pressure contact blade, the legs on both sides of the blade portion can be used as tab support portions of the terminal, and It can be installed inside the connection box and can be easily manufactured by simply modifying a part of the molding die of the existing press contact terminal.

Further, when two pairs of legs for supporting the upper portion provided with a plurality of tabs are provided, the tabs can be securely held in a stable state, and the terminals of the external circuit can be connected to the terminals of the external circuit. At the time of connection, it can sufficiently withstand the insertion force of the connection terminal.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. Note that the same components and operations as those in the prior art shown in FIG. As shown in FIG. 1, out of a number of wire grooves 1 a formed on the upper surface of the lower case 1, the wire groove 1 a at the left end, the wire groove 1 b at the third position from the left, and the sixth at the left. Wire groove 1c
In addition, electric wires a, b, and c of the wire harness W / H are respectively arranged.

On the other hand, the upper case 2 is provided with a terminal hole in a portion serving as a bottom wall of the connector portion 2a, and a press contact terminal (1P terminal) 6 having one tab 6a corresponding to the electric wire a.
And a press contact terminal (2P terminal) 7 having two tabs 7a and 7b corresponding to the electric wire b, and an external circuit joint terminal (3P terminal) having three tabs 8a, 8b and 8c corresponding to the electric wire c. (Terminals) 8 are fitted to each other.

As shown in detail in FIG. 3 (B), when pressed from above, the 1P press contact terminal 6 tears off the coating of the electric wire a and electrically connects with the core wire of the electric wire a. The contacting blade 6d is formed. As shown in detail in FIG. 3 (A), when pressed from above, the 2P press contact terminal 7 tears off the coating of the electric wire b and electrically contacts the core wire of the electric wire b. The blade 7d is formed.

3P external circuit joint terminal 8
As shown in FIGS. 2 (A) and 2 (B), the conventional press-contact blade is removed to eliminate the function of tearing off the insulation coating of the electric wire c, and an outer fitting hole 8e for externally fitting the insulation coating of the electric wire is provided. I have. Both side legs 8f of the outer fitting hole 8e have a function as supporting legs of the tabs 8a to 8c.

That is, as shown in FIGS. 2C and 2D, the blade portion 8d corresponding to the press-contact blade of the other press-contact terminals 6, 7 is cut off as indicated by hatching in the figure, so that the external fitting is performed. A groove 8e is formed. For example, since the outer diameter of the insulation coating of the electric wire c is usually 1.6 to 1.7 mm, the press-contact blade 8d
When the outer width W1 is 3.4 mm, the inner width W3 of the press contact blade 8d is
Is 0.5 mm, and the inner width W2 of the outer fitting groove 8e is 2 mm.
Then, the coating of the electric wire c is not torn at the outer fitting groove 8e. The support legs of the tabs 8a to 8c having a width W4 of 0.7 mm are left on both sides of the groove 8e.

The external circuit joint terminal 8 has a rectangular frame portion 8h at a lower portion of an upper portion provided with a plurality of tabs 8a to 8c.
Are provided on opposite sides of the rectangular frame portion 8h.
A tab supporting portion having an external fitting groove portion 8e provided between f.

The tabs 6a, 7a, 7b, 8a to 8c of the press contact terminals 6, 7 and the external circuit joint terminal 8 are
When the female connector 9 is inserted into the connector portion 2a while facing the connector portion 2a of the upper case 2, the terminal 9a in the female connector 9 is inserted and connected to the tab 6a,
Similarly, the terminal 9b is connected to the tab 7a, and the terminal 9c is connected to the tab 7a.
b, terminal 9d to tab 8a, terminal 9e to tab 8b,
The terminals 9f are respectively inserted and connected to the tabs 8c.

With the above construction, the female connector 9 is connected to the connector 2 of the upper case 2 as shown in FIG.
a, the terminal 9a is inserted and connected to the tab 6a of the press contact terminal 6, and the press contact terminal 6 is connected to the electric wire a by the press contact blade 6d.
Terminal 9a and electric wire a.
A conductive circuit as shown by an arrow A is formed between the two.

The terminals 9b and 9c of the female connector 9 are
The press contact terminals 7 are inserted and connected to the tabs 7a and 7b of the press contact terminals 7, respectively. The press contact terminals 7 are in electrical contact with the core wire of the electric wire b by the press contact blades 7d. A conduction circuit as shown by arrow B is formed.

On the other hand, the terminals 9d to 9f of the female connector 9
The terminals 8 are inserted and connected to the tabs 8a to 8c of the external circuit joint terminal 8, respectively. The terminal 8 is not the press contact blade 8d, but the external fitting groove 8e does not cut off the coating of the electric wire c.
And does not make electrical contact with the core wire of the electric wire c, a folded joint circuit is formed between the terminals 9d to 9f and the tabs 8a to 8c of the terminal 8 as shown by an arrow C. You.

The outer fitting groove 8e of the terminal 8 does not have a function of tearing off the coating of the electric wire c, but its both side legs 8f have tabs 8f.
The functions as supporting legs of a to 8c are left. Therefore, the use of the terminal 8 eliminates the need for another conventional joint connector. Since the terminal 8 does not have the blade portion of the press contact blade of the press contact terminal and is merely formed in the outer fitting groove 8e, only a part of a molding die for forming the press contact terminal with the press contact blade is remodeled. The external circuit joint terminal 8 having the external fitting groove 8e can be easily formed.

It should be noted that the external circuit joint terminal 8 is not limited to the above-mentioned shape, and when there is one tab, the tab supporting strength can be reduced. Therefore, only one set of legs serving as the tab supporting portion may be provided. .

[0023]

As is apparent from the above description, the terminal for the external circuit joint according to the first aspect of the present invention does not tear off the insulating coating except for the portion of the press contact blade which comes into contact with the core wire of the wire of the wire harness. Since it is only an external fitting groove, the both side legs can be used as a tab support, and therefore,
Similarly to the insulation displacement terminals, by arranging the electric connection box inside the electric connection box and connecting an external circuit to the plurality of tabs, the electric connection box can be folded back in the same connector. Therefore, the use of the press contact terminal eliminates the need for another conventional joint connector. In addition, since the blade portion of the press contact blade of the press contact terminal is only formed in the groove, it is only necessary to modify a part of the molding die of the existing press contact terminal, and the molding can be performed at low cost.

Further, when two pairs of legs for supporting the plurality of tabs are provided, the supporting strength of the tabs is increased, and the terminal can sufficiently withstand the insertion force when the terminals are inserted and connected to the tabs. I can do it.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an electric junction box having an external circuit joint terminal according to the present invention.

2 (A) is a front view, FIG. 2 (B) is a bottom view, FIG. 2 (C) is a front view showing the relationship between a press-contact blade and a groove, and FIG. 2 (D) is a front view. It is a bottom view of (C).

3A is a front view of the press contact terminal 7, and FIG. 3B is a front view of the press contact terminal 6. FIG.

FIG. 4 is a perspective view of a conventional joint connector.

FIG. 5 is a perspective view of a conventional electric connection box having a press contact terminal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower case 2 Upper case 6 Pressure contact terminal 6a Tab 6d Pressure contact blade 7 Pressure contact terminal 7a, 7b Tab 7d Pressure contact blade 7e Groove 8 External circuit joint terminal 8a-8c Tab 8e Groove 8f Leg 8h Rectangular frame 9 Female connector 9a-9f Terminals a, b, c Wire W / H Wire harness

Continuation of the front page (56) References JP-A-6-46519 (JP, A) JP-A-7-312239 (JP, A) JP-A-7-296872 (JP, A) JP-A-7-130409 (JP) JP-A-7-78461 (JP, A) JP-A-61-45575 (JP, A) JP-A-62-154586 (JP, A) JP-A-2-72620 (JP, U) 2-47770 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01R 4/24, 31/02 H02G 3/16

Claims (2)

(57) [Claims] A terminal for an external circuit joint of an electric connection box using an electric wire and a press contact terminal pressed against the electric wire as an internal circuit, wherein the terminal is fitted to the outer periphery of the insulating coating without cutting off the insulating coating of the electric wire. An external fitting groove is provided between both side legs, and these legs are supported and attached to an insulating plate arranged inside the case or inside the case of the electric connection box, and a plurality of tabs are projected to the opposite side to the legs. An external circuit joint terminal used in an electric connection box that connects these plurality of tabs to an external circuit and enables connection of the external circuit without passing through wires of the internal circuit. 2. A method according to claim 1, wherein a rectangular frame portion is provided at a lower portion of the upper portion from which the plurality of tabs protrude, and support portions provided with external fitting grooves between both side legs are provided on opposite sides thereof. Item 2. An external circuit joint terminal according to Item 1.