JP3330511B2 - 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 such as a junction block having an improved fuse mounting structure.

[0002]

2. Description of the Related Art As a conventional fuse mounting structure of this type, for example, there is one shown in FIG.
No. 61417). FIG. 4A is an exploded perspective view of the electric connection box, and FIG. 4B is a perspective view of the laminated bus bar wiring board as viewed from the back.

In this electric junction box, a fuse mounting portion is provided on a side surface of the cover. That is, the cover is the upper cover 1
And a lower cover 3. A fuse mounting portion 5 is provided on a side surface of the upper cover 1. A plurality of, for example, three-stage fuse insertion portions 7 are provided in the fuse mounting portion 5 in parallel along the side surface of the upper cover 1. Also,
A bus bar 11 is provided on the laminated bus bar wiring board 9 to constitute an electric circuit on the upstream and downstream sides of the fuse inserted into the fuse insertion portion 7 of the fuse mounting portion 5, and the bus bar 11 is formed to be bent with respect to the bus bar 11. A plurality of tab terminals 13 are provided. Such a tab terminal 13
Are formed in a plurality of rows and a plurality of rows corresponding to the plurality of rows and a plurality of rows of fuse insertion portions 7. Therefore, the laminated bus bar wiring board 9 is attached between the upper cover 1 and the lower cover 3, and each tab terminal 13 faces each fuse insertion portion 7.

[0004]

However, if the fuse insertion portions 7 are provided in a plurality of rows and a plurality of rows as described above, the bus bars 11 must be laminated accordingly, and each tab terminal 13 must be bent in a complicated manner. Must. Therefore, if the circuit of the fuse part is changed, it is difficult to manage the bus bar 11 and all layers must be reconsidered. Therefore, it cannot be used for another vehicle having a different specification, and the design must be reviewed. There was a problem.

Accordingly, an object of the present invention is to provide an electric junction box having a simple bus bar structure and easy to be used for other vehicles having different specifications.

[0006]

According to a first aspect of the present invention, in an electric connection box having a fuse mounting portion on a side surface of a cover, the fuse mounting portion is divided into a cover-side housing portion and a fuse mounting block. A plurality of fuse connection terminals facing the cover-side housing portion are arranged in parallel on a bus bar provided on the cover side, and the fuse connection block facing the inside of the cover-side housing portion and the outside of the fuse attachment block face the fuse mounting block. A plurality of block terminals having an electric wire connection portion are arranged in parallel, and the electric wire of the wiring board is connected to the electric wire connection portion of the block terminal.

Accordingly, when the fuse connecting terminal of the bus bar is made to face the cover side receiving portion and the fuse mounting block is fitted into the cover side receiving portion, the fuse connecting terminal portion of the bus bar and the fuse connecting portion of the fuse mounting block. Thus, a fuse mounting portion can be formed on the side surface of the cover. Further, a circuit can be formed by connecting the electric wire of the wiring board arranged on the cover to the electric wire connection portion of the block terminal in the fuse mounting block. In this state, a plurality of fuses can be mounted side by side along the side surface of the cover together with the fuse mounting block in the cover side accommodating portion. And since it is the structure which a plurality of fuse connection terminal parts and fuse connection parts are juxtaposed, it can be constituted by a busbar and a wiring board of one layer in addition to the divided cover side accommodation part and the fuse mounting block.

According to a second aspect of the present invention, in the electrical junction box according to the first aspect, the cover-side receiving portion is a concave portion formed on a side surface of the cover, and the fuse mounting block is formed in the concave portion. It is characterized in that it is a block body to be fitted to.

Therefore, in addition to the effect of the first aspect of the present invention, the fuse mounting portion can be formed by fitting the block body serving as the fuse mounting block into the concave portion serving as the cover side receiving portion.

According to a third aspect of the present invention, in the electric connection box according to the first or second aspect, the fuse connection portion and the electric wire connection portion of the block terminal have a press-contact structure.

Therefore, in addition to the effect of the first or second aspect of the present invention, the fuse and the electric wire can be connected to the fuse connecting portion and the electric wire connecting portion of the block terminal by pressure welding.

According to a fourth aspect of the present invention, there is provided the electrical junction box according to any one of the first to third aspects, wherein the cover is an undercover of a junction block.

Therefore, in addition to the function of any one of the first to third aspects of the present invention, the fuse mounting portion having the above configuration can be provided on the side surface of the junction block.

[0014]

1 to 3 are exploded perspective views showing an electric connection box such as a junction block according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of a fuse mounting block. FIG. 3 is a perspective view of the block terminal.

First, FIG. 1 shows an under cover 15 of an electric junction box such as a junction block.
A fuse mounting portion 17 is provided on a side surface 15 a of the under cover 15. The fuse mounting portion 17 is configured by dividing a cover side housing portion 19 and a fuse mounting block 21.

The cover-side housing portion 19 has a substantially rectangular recess 2.
3 and a partition wall 27 erected from the bottom 25 at the center.
Is provided. Left and right side walls 23a, 2 of the recess 23
3b is a guide groove 2 for inserting the fuse mounting block 21.
9 are provided. The under cover 15 is provided with a routing groove 31 for the bus bar 11. Reference numeral 33 denotes a fitting wall for attaching a wiring board or a main cover described below to the under cover 15.

The bus bar 11 is provided in a single layer, has a shape corresponding to the wiring groove 31, has an end bent in an L-shape, and has a plurality of fuse connection terminal portions 11 a facing the inside of the cover side housing portion 19. Has been established. Fuse connection terminal 1
1a is on the power supply side (upstream) with respect to the connected fuse (not shown).

The fuse mounting block 21 is a block that fits into the concave portion 23 of the cover-side housing portion 19, and has a partition wall 21a formed on one side to define a groove for fuse insertion, and the central portion includes the partition. A fitting groove 21b that fits into the wall 27 is provided. Guide projections 2 fitted into the guide grooves 29 are provided at the left and right ends of the fuse mounting block 21.
1c is provided. Also, the fuse mounting block 21
The block terminal 35 is connected to the fuse connection terminal 11.
They are arranged side by side corresponding to a. The fixing of the block terminals 35 to the fuse mounting block 21 is integrally formed by insert molding or outsert molding of resin.

As shown in FIGS. 1, 2, and 3, the fuse connecting portion 35a of the block terminal 35 is connected to the partition wall 21a.
The wire connecting portion 35b faces the fuse mounting block 2
1. The fuse connecting portion 35a and the electric wire connecting portion 35b have a pressure contact structure as shown in FIG.

Also, as shown in FIG.
A wiring board (wiring sheet) 37 is attached to the wiring board 37.
A plurality of connecting portions 37a for protruding 5b are provided. The electric wire connection portions 35b are arranged at the respective connection portions 37a, and the ends of the electric wires wired on the wiring board 37 are connected by pressure welding to the electric wire connection portions 35b.

When assembling, first, the bus bar 11 is routed in the routing groove 31 of the undercover 15, and the fuse connection terminal portion 11 a faces the inside of the cover-side housing portion 19. Next, the fuse mounting block 21 in which the plurality of block terminals 35 are integrally formed is fitted into the recess 23 of the cover-side housing portion 19. At the time of this fitting, the guide projections 21c on the left and right sides of the fuse mounting block 21 are
3, the fitting groove 21b is fitted into the partition wall 27, and the fuse mounting block 21 is positioned and fitted into the cover-side accommodating portion 19.

Next, the wiring board 37 is fitted into the fitting wall 33 of the under cover 15, and the wire connecting portions 35 of the block terminals 35 of the fuse mounting block 21 are fitted to the connecting portions 37a.
Bring b. An end of an electric wire (not shown) is press-connected to each electric wire connection portion 35b. The electric wire is on the load side (downstream) with respect to the fuse (not shown) to be connected.

With this structure, the fuse connection terminal 11a and the fuse connection 3
A plurality of fuse mounting portions 17 are provided.

A main cover (not shown) is mounted on the wiring board 37 and fixed to the under cover 15. A board and a board cover are attached below the under cover 15.

As described above, the fuses are arranged side by side and mounted, and the fuse mounting portion 17 is
Since the bus bar 11 is divided into the bus bar 11 and the fuse mounting block 21, the bus bar 11 may be formed as a single layer, and manufacturing and assembling becomes extremely easy. Further, even when the number of fuses increases or decreases, it is possible to easily cope with this. For example, since the number of the fuse connection terminal portions 11a of the bus bar 11 and the number of the block terminals 35 can be made to correspond to the number according to the specification and only a plurality of types can be prepared in advance, it can be easily applied to other vehicles having different specifications. Can be diverted. Since one of the block terminals 35 is connected to an electric wire, it is possible to cope with a change in the circuit by changing the circuit of the electric wire while keeping the bus bar 11 as it is.

It should be noted that the block terminals are not necessarily required to have a pressure contact structure, and one or both may be tab terminals.

[0027]

According to the first aspect of the present invention, only one bus bar is required, and manufacturing and assembling become extremely easy. Further, even if the number of fuses changes, only the number increases or decreases in the fuse juxtaposition direction, so that it is extremely easy to divert to other vehicles. Then, it is possible to cope with the change of the circuit only by changing the circuit without changing the bus bar.

According to the second aspect of the present invention, in addition to the effects of the first aspect, assembling of the divided cover side housing portion and the fuse mounting block can be performed very easily by fitting the block into the concave portion. Assembly accuracy can also be maintained, and assembly becomes extremely easy.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, the assembly can be performed very easily by pressure welding the electric wire and the fuse.

According to a fourth aspect of the present invention, in addition to the effects of any one of the first to third aspects, when a fuse is mounted on the side surface of the junction block, the structure is simple and the diversion to another vehicle is facilitated. Can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a fuse mounting structure according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a fuse mounting block according to one embodiment of the present invention.

FIG. 3 is a perspective view of a block terminal according to one embodiment of the present invention.

FIGS. 4A and 4B are exploded perspective views of a fuse mounting portion structure according to a conventional example, and FIG. 4B is a perspective view of a laminated bus bar wiring board;

[Explanation of symbols]

 11 Bus Bar 11a Fuse Connection Terminal 15 Under Cover (Cover) 15a Side 17 Fuse Attachment 19 Cover Side Housing 21 Fuse Attachment Block 23 Concave 35 Block Terminal 35a Fuse Connection 35b Wire Connection 37 Wiring Board

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-6-46519 (JP, A) JP-A-8-88032 (JP, A) JP-A-4-61417 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) H02G 3/16 H01H 85/54

Claims (4)

(57) [Claims] 1. An electric connection box having a fuse mounting portion on a side surface of a cover, wherein the fuse mounting portion is divided into a cover-side housing portion and a fuse mounting block, and a bus bar provided on the cover side includes a cover bar. A plurality of fuse connection terminals facing the side housing portion are arranged side by side, and a plurality of block terminals having a fuse connection portion facing the inside of the cover side housing portion and a wire connection portion facing the outside of the fuse attachment block are arranged in the fuse mounting block. An electric connection box, wherein an electric wire of a wiring board is connected to an electric wire connection portion of the block terminal. 2. The electrical junction box according to claim 1, wherein the cover-side receiving portion is a concave portion formed on a side surface of the cover, and the fuse mounting block is a block fitted into the concave portion. An electrical junction box, which is a body. 3. The electric connection box according to claim 1, wherein the fuse connection part and the electric wire connection part of the block terminal are:
An electric junction box having a pressure contact structure. 4. The electric junction box according to claim 1, wherein said cover is an under cover 15 of a junction block.