JP2565750Y2 - 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 mounted on, for example, an automobile.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, an electric connection box of this type includes a bus box 2 having a bus bar terminal 2a and an insulating plate 3 in a connection box case 1 comprising a lower case section 1a and an upper case section 1b. A plurality of blade-type fuses 4 are connected to the bus bar terminal 2a directly or via the relay terminal 5 on the upper case portion 1b, and a wire harness connection connector 6 is provided on the lower surface of the lower case portion 1a. The structure was attached.

In this case, since the blade type fuse 4 has only one fusible portion, only the blown blade type fuse 4 needs to be replaced, and the maintenance property is excellent.

[0004]

However, in the conventional blade type fuse 4, however, the frequency of fusing in actual use is very small, and at present, the merits thereof cannot be fully utilized.

[0005] Further, the blade type fuse 4 is large in size, so that there is a problem that the electric junction box becomes large.

Further, in this blade type fuse 4, 1
Since each unit is independent, there is a problem that the cost is high when used in an electrical junction box requiring a large number of units.

An object of the present invention is to reduce the cost by increasing the density of fuses and to reduce the thickness.
An object of the present invention is to provide an electrical junction box that can be used .

[0008]

To explain the present invention to achieve the object of the structure [Means for Solving the Problems], Ru der as follows.

[0009] Electrical connection box according to claim 1 is the parallel branch piece as a plurality of branch piece and having no lead piece movable soluble portion having a respective soluble portion, the proximal end of the branch piece A fuse circuit made of a stamped and formed metal plate having a structure connected by a connecting piece is housed in a card-shaped fuse case made of an insulator, and each fuse terminal integrated with the fuse circuit is provided outside the fuse case. Equipped with a card-type fuse unit that can be connected to
In the card type fuse unit, the fuse terminal is electrically connected to a bus bar terminal of each bus bar contained in the connection box case, and the fuse terminal is connected to the bus bar.
Is electrically connected to the busbar terminals of
Insulation where the fuse case is mounted with the busbar
It is characterized in that it is in a state also serving as a part of the plate .

[0010]

In the electrical junction box according to the first aspect, a plurality of branch pieces each having a fusible portion and a branch piece serving as a lead piece not having the fusible portion are juxtaposed, and the base ends of these branch pieces are provided. Since a card-type fuse unit having a built-in fuse circuit made of a stamped and formed metal plate having a structure connected by a connecting piece is used, the return piece of each branch piece having a fusible portion is formed by the presence of the connecting piece. Since the branch pieces as the lead pieces are shared, the fuse circuit is simplified and the density is increased, so that the cost of the fuse can be reduced. Further, the area occupied by the fuses is reduced, and the size of the electric connection box can be reduced. Furthermore, in this electrical junction box, the card
Type fuse unit fuse terminal
When it is electrically connected to the bar terminals,
Case also serves as part of the insulating plate on which the busbar is mounted.
The electrical connection box can be made thinner because it is
You.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. Parts corresponding to those in FIG. 6 described above are denoted by the same reference numerals.

FIG. 1 shows a first embodiment of an electric junction box according to the present invention. In the electric junction box of the present embodiment,
The bus bar terminals 2a of the bus bars 2 on the insulating plate 3 are raised in a curved state so as to have a spring property and are inclined and arranged in a horizontal row. Guides 7 are raised on both sides of the insulating plate 3 in the width direction. A rib 8 is provided upright from the portion of the insulating plate 3 between the bus bars 2 in a direction parallel to the guide 7. This rib 8 can be omitted when the insulating plate 9 is used.

The card type fuse unit 10 is inserted on the insulating plate 3 having such a row of the bus bar terminals 2a and connected to each bus bar terminal 2a.

The card type fuse unit 10 is provided with a stamped and formed body 11 formed by stamping and forming an appropriate metal plate such as a zinc alloy or a copper alloy by pressing. The punched molded body 11 has a plurality of branch pieces 1 each having a fusible portion 13.
2 and a branch piece 1 as a lead piece without the fusible portion 13
2 are arranged side by side, and the base ends of these branch pieces 12
To form a fuse circuit 15.
The punched molded body 11 is housed in a common card-shaped fuse case 16 made of an insulator with at least the tip of each branch piece 12 exposed as a fuse terminal 12a. The fuse case 16 is formed by insert molding or molding with a resin such as nylon or polybutylene terephthalate. A reverse insertion preventing rib 17 is provided on a side surface of the fuse case 16. A guide groove 18 is provided in the inner portion of the upper case portion 1a corresponding to the reverse insertion preventing rib 17. At the rear of the fuse case 16, a detachable rib 19 is provided as necessary.

In such an electric junction box, a fuse circuit 15 having a structure in which a return piece of each branch piece 12 having a fusible portion 13 is shared by a branch piece 12 as a lead piece due to the presence of a connection piece 14 is provided. Since the built-in high-density card type fuse unit 10 is used, the cost of the fuse can be reduced as compared with the case where a large number of blade type fuses are used. When such a card type fuse unit 10 is used, the area occupied by the fuses is reduced, and the size of the electrical junction box can be reduced.

If a relay 20 and a connector are mounted on the upper case portion 1b where it is no longer necessary to provide a fuse, a more sophisticated electrical junction box can be obtained.

FIG. 2 shows a second embodiment of the electric junction box according to the present invention. In the present embodiment, the bus bar terminals 2 a are projected from the upper surface of the junction box case 1, and the hooks 22 are projected from the edge of the upper surface, so that the card type fuse unit 10 is attached to the upper surface of the junction box case 1. FIG. In this case, fuse case 1
6, a fuse terminal 1 consisting of an end of each branch piece 12
2a is exposed. The card type fuse unit 10 can be similarly mounted on the lower surface of the connection box case 1.

FIG. 3 shows a third embodiment of the electric junction box according to the present invention. In the present embodiment, an example is shown in which a plurality of card type fuse units 10 are inserted and connected in the connection box case 1. in this case,
The inner surface of the junction box case 1 has a plurality of insertion guide portions 23 in a plurality of stages.
Is provided.

FIGS. 4 and 5A and 5B show a fourth embodiment of the electric junction box according to the present invention. In this embodiment, an example is shown in which a cutout portion 24 is provided in a part of the insulating plate 3 and the card type fuse unit 10 is inserted and connected to the cutout portion 24. That is, the insulating plate 3
The busbar terminals 2a of the upper and lower busbars 2 are notches 2
4 is inserted into the insulating plate 3 so as to protrude toward the notch 24. Notch 2
4 has an insertion guide rib 25 protruding therefrom.

As described above, the card type fuse unit 10
Into the notch 24 of the insulating plate 3 and
12a is electrically connected to the bus bar terminal 2a of each bus bar 2.
When the connection is continued, the fuse case 16
And also serves as a part of the insulating plate 3 on which the electric connection box is mounted, and the electric connection box can be made thinner.

The connection between the bus bar terminal 2a and the branch piece 12 of the card type fuse unit 10 is not limited to the direct connection as described above, but may be of course a connection via a relay terminal or the like.

[0022]

As described above, according to the electric junction box of the present invention, the following effects can be obtained.

In the electric junction box according to the first aspect, a plurality of branch pieces each having a fusible portion and a branch piece serving as a lead piece not having the fusible portion are juxtaposed, and the base ends of these branch pieces are provided. Since a card-type fuse unit having a built-in fuse circuit made of a stamped and formed metal plate having a structure connected by a connecting piece is used, the return piece of each branch piece having a fusible portion is formed by the presence of the connecting piece. The branching pieces as the lead pieces are shared, so that the fuse circuit is simplified and the density is increased, and the cost of the fuse can be reduced as compared with the case where a large number of blade fuses are used. When such a card type fuse unit is used, the area occupied by the fuses is reduced, and the size of the electric connection box can be reduced. Further, the cost can be reduced because an expensive printed circuit board is not used as compared with a case where a card is formed by providing a fuse circuit on a printed circuit board. Also, in this electrical junction box, card type
The fuse terminals of the fuse unit are
-When the terminal is electrically connected to the terminal,
Case also serves as a part of the insulating plate on which the busbar is mounted.
The electrical junction box.
Can be.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment of an electrical junction box according to the present invention, with a part cut away.

FIG. 2 is an exploded perspective view of a second embodiment of the electric junction box according to the present invention, with a part cut away.

FIG. 3 is an exploded perspective view of a third embodiment of the electric junction box according to the present invention;

FIG. 4 is an exploded perspective view of a fourth embodiment of the electric junction box according to the present invention.

5A is a cross-sectional view taken along line AA of FIG. 4, and FIG. 5B is a view taken along line B of FIG.

FIG. 6 is an exploded perspective view of a conventional electric junction box.

[Explanation of symbols]

 Reference Signs List 1a Lower case part 1b Upper case part 1 Connection box case 2 Bus bar 2a Bus bar terminal 3 Insulating plate 4 Blade type fuse 5 Relay terminal 10 Card type fuse unit 11 Stamped molded body 12 Branch piece 12a Fuse terminal 13 Soluble part 14 Connecting piece 15 Fuse circuit 16 Fuse case 24 Notch

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-142622 (JP, A) JP-A-57-151141 (JP, A) JP-A-59-23430 (JP, A) 285230 (JP, A) Japanese Utility Model 2-106664 (JP, U) Japanese Utility Model 56-86776 (JP, U) Japanese Utility Model 63-123038 (JP, U) Japanese Utility Model 3-130144 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A structure in which a plurality of branch pieces each having a fusible portion and a branch piece as a lead piece having no fusible portion are arranged side by side, and the base ends of these branch pieces are connected by a connecting piece. A fuse circuit made of a stamped and formed metal plate is housed in a card-shaped fuse case made of an insulator, and each fuse terminal integrated with the fuse circuit is provided in the fuse case so as to be connectable to the outside. comprising a card type fuse units in, the card type fuse unit is electrically connected to the bus bar terminal of the bus bars to which the fuse terminal is built in junction box case, the Hugh
Terminal is electrically connected to the bus bar terminal of each bus bar.
When the fuse case is in the
An electrical junction box, wherein the electrical junction box also serves as a part of an insulating plate on which a bar is mounted .