JP3085207B2 - 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 junction box comprising a junction box used for a wire harness for an automobile.
It is intended to be used at high density.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 8, a junction box used for a wire harness for an automobile has a connector fitting portion 2, a relay fitting portion 3,
A fuse fitting portion 4 and the like are protrudingly provided.
Reference numerals 3 and 4 are dedicated to connectors, relays, and fuses, respectively. In the drawing, reference numeral 5 denotes a lower case, which houses an insulating plate 6, a bus bar 7 and the like between the lower case 5 and the upper case 1.

[0003]

Therefore, only the connector can be fitted in the connector fitting portion 2 described above. Similarly, only the relay is fitted in the relay fitting portion 3 and the fuse fitting portion 4 is fitted in the relay fitting portion 3.
Can fit only fuses. Therefore,
When the circuit is changed in accordance with the grade or the like, a part of the fuse becomes unnecessary, but even if it is desired to increase the number of connectors to be fitted, the connector cannot be fitted to the fuse fitting portion 4. . In this case, it is necessary to attach the connector to the wire harness at a portion other than the junction box. On the other hand, the junction box has an unused fuse fitting portion to which a fuse cannot be attached. The internal circuit provided in this way cannot be used and becomes unused.

[0004] As described above, since the fitting parts of the mounting parts provided in the junction box are dedicated respectively, they cannot cope with a circuit change, cannot use the junction box efficiently, and must be used for other than the junction box. There is a problem that the number of connectors that need to be increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to share a mounting part fitting portion so that a junction box can be used efficiently without an unused portion.

[0006]

According to the present invention, there is provided an electric junction box comprising a junction box for an automobile, wherein the tabs protrude from the case at the same pitch. A mounting part including a fuse, a diode, a connector for electric wire connection, a short pin, and the like is provided. On the box side of the electric connection box, a common mounting part for the mounting part is provided. The electric connection box is provided with a tab insertion opening, and the above-mentioned mounting component is selected and attached, and a tab inserted from the tab insertion opening is connected to an internal circuit in the electric connection box.

In the above configuration, if the mounting part of the mounting component provided in the junction box can be mounted by any of an integrated fuse, a diode, a connector for electric wire connection, and a short pin, the integrated fuse is changed according to a change in circuit design. In this case, the integrated fuse can be attached instead of the connector, and the junction box can be used at a high density by eliminating the unused mounting part attaching portion.

The common mounting portion projects from the box of the electric connection box, and the tab insertion holes are opened in parallel on the upper surface of the common mounting portion, while the lock claws protrude near the common mounting portion. The provided lock piece protrudes from the box, and the wire connection connector is provided with a lock hole for locking the lock claw.

More specifically, a common mounting portion protruding in a rectangular shape is provided on the upper surface of the upper case of the junction box, and an integrated fuse or a diode is mounted on the upper surface of the common mounting portion. Insert the protruding tab from the tab insertion hole of the common mounting part and mount it. On the other hand, in the case of mounting an electric wire connection connector accommodating a terminal crimped to an electric wire end, a fitting portion having a lower surface opening is provided from a portion of the electric wire connection connector provided with the terminal accommodating chamber, and The part is externally fitted to the common mounting part, and a lock claw provided on the junction box side is locked and fixed to a lock hole formed in the peripheral wall of the fitting part. At this time, it is preferable to provide a protrusion for preventing backlash on the peripheral wall of the common mounting portion, and to press against the inner surface of the fitting portion of the externally fitted connector.

The integrated fuse selectively mounted as the electric wire connection connector or the diode is connected to one power supply side tab and a branch from the extension of the power supply side tab, and is fused to each branch. And at least one conductive plate provided with a load connection side tab is accommodated in the case, and the power supply side tab and the load connection side tab are projected in parallel from the same surface of the case.
In the integrated fuse having such a configuration, the number of divided power supply circuits can be distributed, and a plurality of fuses can be formed using one conductive plate. In addition, since the power supply connection side tab and the load connection side tab of the integrated fuse are connected to the power supply side and the load side of the internal circuit of the electric connection box, each load side circuit can be connected via a fusing section without taking up space. The power supply side circuit can be connected. In addition, in the integrated fuse, since the allowable current amount on the load connection side provided to be branched from the power supply connection side can be reduced, the diameter of the wire connected to the load side component can be reduced, and the wire harness can be enlarged accordingly. It can be suppressed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

As shown in FIGS. 1 (A), 1 (B) and 1 (C), a common mounting portion 12 for mounting components is projected from an upper case 11 of a junction box.
The integrated fuse 10 shown in FIG. 2 is mounted as shown in FIG. 3, or the electric wire connection connector 30 shown in FIG.
It is possible to select and attach as shown in FIG.

The integrated fuse 10 is shown in FIGS. 2A and 2B.
As shown in (C), a case 20 made of an insulating resin
Accommodates two sets of conductive plates 21 (21A, 21B), each of which has a shape having three comb teeth as shown in the figure, and a power supply connection at the tip of one tooth (a). A side tab 21a is provided, and a bent portion 21c is provided in a direction perpendicular to the tip of the extending portion 21b, and two teeth (b) and (c) are branched from the bent portion 21c.
Load connection side tabs 21g, 21h at the ends of d, 21f, respectively.
And a narrow fusing portion 2 in the middle of the branch portion.
1i and 21k are provided.

The tabs 21a, 21g and 21h are projected from the lower surface of the case 20 at a constant pitch P, and two sets of conductors accommodated in the case 20 are adjacent to the power connection side tabs 21a and 21a at the center. The load connection side tabs 21g and 21h are projected on both sides thereof. These six tabs are juxtaposed and project from the lower surface of the case 20 at the same pitch P.

The common mounting portion 12 for mounting components provided in the junction box is formed to protrude in a rectangular shape on the upper surface of the upper case 11, and the integrated fuse 10 is formed on the upper surface thereof.
Tabs 21a, 21g, 21h projecting from the lower surface of the case
Six tab insertion ports 12a are opened at the same pitch P. The common mounting portion 12 is provided with six chambers 12b separated by a partition 12c from a terminal housing chamber 12b having a lower surface opening communicating with each tab insertion opening 12a.

A lock piece 15 protrudes from the upper surface of the upper case 11 on the side of the common mounting portion 12, and a lock claw 15 a is provided at the tip thereof for locking with the connector 30. In addition, a play preventing protrusion 12d is provided on the outer surface of the common mounting portion 12 opposite to the side on which the lock piece 15 is provided.

A relay terminal 18 is provided in each terminal accommodating chamber 12b.
Is inserted, and a tab 13 a provided on the bus bar 13 housed in the junction box is inserted from the lower end opening of the relay terminal 18 to be electrically connected to the relay terminal 18. At this time, as shown in FIGS. 6A and 6B, the tabs 13a of the bus bar 13 connected to the power supply side are inserted into the two center terminal housing chambers 12b, while the two terminal housings on the left side are inserted. A tab 13a 'of a bus bar 13' on the load side connected to the floor harness is inserted into the chamber 12b. Further, tabs 13 of load-side bus bars 13 ″ connected to the cowl harness are provided in the two terminal accommodation chambers 12 b on the right side.
a "is inserted.

An electric wire connection connector 30 fitted to the common mounting portion 12 is provided at a tip end of a portion 34 provided with a terminal accommodating chamber 33 accommodating a terminal 32 crimped to an end of the electric wire 31 in FIG. A fitting portion 35 having an opening on the lower surface side is provided, and a lock hole 36 is provided in a part of the peripheral wall of the fitting portion 35. The electric wire connection connector 30 is configured such that the fitting portion 35 is externally fitted to the common mounting portion 12, and the lock claw 15 a is locked and fixed in the lock hole 36 of the fitting portion 35. At the time of fitting, the rattling preventing projection 12d is pressed against the inner surface of the fitting portion 35 to prevent the connector 30 from rattling.

The electric wire connection connector 30 has six terminal accommodating chambers 33, and the terminal 3 inserted into each terminal accommodating chamber 33.
2 is a male terminal, and a tab 32a at the tip of each terminal 32
Project from the hole 35a formed in the bottom wall of the fitting portion 35 at the same pitch as the tabs 21a, 21g, 21h of the integrated fuse 10. The tabs 32a have the same shape as the tabs 21a of the integrated fuse 10 and the like.

Although not shown, the diode is also provided with six tabs having the same shape as the tab of the integrated fuse 10 projecting at the same pitch. Further, as shown in FIG.
Further, six tabs 42 having the same shape as the tabs of the integrated fuse 10 are provided so as to protrude at the same pitch.

In the junction box having the above-described structure, the integrated fuse 10 as shown in FIG. 3, the electric wire connector 30 as shown in FIG. Alternatively, a short pin 40 can be attached.

When the integrated fuse 10 is mounted as shown in FIG. 3, the tabs 21a, 21a of the integrated fuse 10 are used.
g and 21h are inserted from the tab insertion openings of the common mounting portion 12 and connected to the internal relay terminal 18, and the case 20 is mounted on the upper surface of the common mounting portion 12.

When the integrated fuse 10 is mounted,
6A, one of the tabs 13a of the bus bar 13 connected to the power supply is connected to the tab 13a 'of the bus bar 13' on the floor harness side via a fusing portion. That is, terminals (3)-(1),
(3)-(2) are connected via fuses, respectively.
Further, among the tabs 13a of the bus bar 13 connected to the power supply,
The other tab is connected to the tab 13a "of the bus bar 13" on the cowl harness side via a fusing portion. That is,
(4)-(5) and (4)-(6) are respectively connected via fuses.

When the electric wire connector 30 is attached to the common attachment portion 12 and fixed by locking as shown in FIG. 5 instead of the integrated fuse 10, the circuit configuration shown in FIG. 6B is obtained.

For example, the electric wires 31 connected to the electric wire connecting connector 30 constitute an instrument panel harness (instrument panel harness), and the tabs of the crimp terminals 32 connected to the ends of these electric wires 31 are connected to the inside of the common mounting portion 12. Is connected to the bus bars 13, 13 ', 13 "via the relay terminal 18 of the instrument panel harness side, the central terminal (9) (1)
0) is connected to the power supply side terminal, and the floor harness terminal (1) is connected to the left terminals (7) and (8) on the instrument panel harness side.
(2) is connected, and the right terminal (1
1) Terminals (5) and (6) of the cowl harness are connected to (12).

As described above, the power supply side circuit and the load side circuit are connected to the internal circuit of the junction box via the integrated fuse, and the internal circuit of the junction box is connected to the external wiring harness via the connector 30. And can be connected.

[0027]

As is apparent from the above description, in the electric junction box comprising the junction box according to the present invention, the mounting part for the mounted parts is used as the common mounting part, and the integrated fuse, the connector for electric wire connection or the diode is used. Since the components can be selected and mounted, mounting components can be mounted according to a change in circuit design. Therefore, there is no unused mounting part mounting portion in the junction box, and the internal circuit of the junction box can be effectively used.

Further, since the connector for wire connection can be attached instead of the integrated fuse, there is an advantage that it is not necessary to attach the connector other than the junction box.

[Brief description of the drawings]

1A and 1B show a part of a junction box according to an embodiment of the present invention, wherein FIG. 1A is a plan view and FIG.
FIG. 2C is a cross-sectional view taken along a line b, and FIG.

FIG. 2 shows an integrated fuse, (A) is a plan view,
(B) is a front view, and (C) is a drawing in which the front side of the case is cut away.

FIG. 3 is an explanatory diagram in a case where an integrated fuse is mounted on a common mounting portion of a junction box.

4A and 4B show a connector for electric wire connection to be attached to the common mounting portion, wherein FIG. 4A is a front view, FIG. 4B is a bottom view, and FIG.
Is a partially broken side view.

FIG. 5 is an explanatory view when the electric wire connection connector is attached to a common attachment portion.

FIG. 6A is a schematic circuit diagram when an integrated fuse is attached, and FIG. 6B is a schematic circuit diagram when an electric wire connector is attached.

FIG. 7 is a perspective view of a short pin to be selectively used.

FIG. 8 is a perspective view of a conventional junction box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Integrated fuse 11 Upper case 12 Common mounting part of mounting parts 13 Bus bar 13b Tab 15 Lock piece 15a Lock claw 18 Relay terminal 20 Case 21 Conductor 21a Power supply connection side tab 21g, 21h Load connection side tab 21k, 21i Fusing part 30 Electric wire Connector for connection

Claims (2)

(57) [Claims] 1. An electric junction box comprising a junction box for an automobile, wherein a mounting component comprising an integrated fuse, a connector for electric wire connection, a diode, and a short pin, wherein tabs project from the case at the same pitch, is provided. On the box side of the electrical junction box is provided a common mounting portion for the mounted components, and the common mounting portion is provided with a tab insertion port at the same pitch as the pitch of the tab,
An electric connection box configured to select and mount the mounting component and connect a tab inserted from a tab insertion port to an internal circuit in the electric connection box. 2. The common mounting portion projects from a box of an electric connection box, and the tab insertion holes are opened in parallel on the upper surface of the common mounting portion, and a lock claw is provided near the common mounting portion. While projecting the lock piece that protrudes from the box,
The electric connection box according to claim 1, wherein the electric wire connection connector is provided with a lock hole in which the lock claw is locked.