JPH09161913A - Connection structure of bus bar and electronic circuit board in electrical connection box with electronic circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the mis-assembly of a housing from happening which contains the connection terminals of a bus bar and an electronic circuit board. SOLUTION: An electronic circuit containing portion is provided in one part of an electrical connection box, and the circuit portion 14a of an electronic circuit board 14 contained in the electronic circuit containing portion and a bus bar contained in the connection box. When the housing 16 which contains connection terminals connecting the circuit portion 14a of the electronic circuit board 14 and tabs provided on the bus bar is fitted to the electronic circuit board 14, mis-assembly preventing ribs 16b to 16e are provided in the housing 16, slits 14b to 14e into which the ribs 16b to 16e fit are simultaneously formed in the electronic circuit board 14, and the formation portions of the ribs 16b to 16e and the slits 14b to 14e mutually corresponding are changed in response to the arrangement of the connection terminals contains in the housing 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection box with an electronic circuit used in a wire harness for an automobile, and more specifically, it can prevent erroneous assembly of a housing accommodating connection terminals of a bus bar and an electronic circuit board. To do so.

[0002]

2. Description of the Related Art Conventionally, as an electric connection box with an electronic circuit of this kind, as shown in FIG. 6, an electronic circuit board 3 is housed in a case 2 different from the electric connection box 1, while the electric connection box 1 is From the bus bar 4 housed inside to the tab 4a protruding upward,
The bus bar side electric connection portion 5a of the connection terminal 5 housed in the housing portion 1a formed on the outer surface of the electric connection box 1 is fitted from above to form the rail groove portions 1b, 1 on the outer surface of the electric connection box 1.
While fitting the rail portions 2b, 2b of the case 2 in b, the circuit portion 3a of the electronic circuit board 3 is laterally fitted to the electronic circuit side electrical connection portion 5b of the connection terminal 5 to form the electrical connection box 1
There is one that electrically connects the bus bar 4 and the circuit portion 3a of the electronic circuit board 3. (See JP-A-58-182414)

In the conventional electrical connection box 1 with an electronic circuit, the circuit portion 3a of the electronic circuit board 3 of the case 2 is housed in the housing portion 1a of the electrical connection box 1 and the electronic circuit side electrical connection portion 5b of the connection terminal 5 is accommodated. Since it is configured to be fitted from the side, the circuit configuration is restricted because only one side of the outer periphery of the electronic circuit board 3 on the insertion tip side can be provided with the circuit portion (connection portion).

Therefore, as shown in FIG. 7, each connection terminal 5
Are housed in the housings 6 and 6, respectively, and the electronic circuit side electrical connection portions 5b of the connection terminals 5 are circuit portions 3a, 3a on the outer periphery (two sides in this example) of the electronic circuit board 3 for each housing.
In this state, the bus bar side electrical connection portions 5a of the connection terminals 5 are simultaneously fitted and attached to the tabs 4a, 4a of the bus bar 4 of the respective housings from above at the same time. The applicant proposed this.

[0005]

However, FIG.
As shown in (B), the arrangement of the connection terminals 5 of one housing 6 (A) is 5 from the left when viewed from the front (see arrow C).
The 11th and 11th are empty (none), and the 6th and 11th from the left are empty (see arrow D) for the arrangement of the connection terminals 5 of the other housing 6 (B) ( Housing 6 (A) if the arrangement is different, such as
May be attached to the circuit portion 3a (B) of the electronic circuit board 3 and the housing 6 (B) may be attached to the circuit portion 3a (A) of the electronic circuit board 3 by mistake.

The present invention has been made in order to solve the above-mentioned problems, and a bus bar and an electronic box in an electric connection box with an electronic circuit capable of preventing erroneous assembly of a housing accommodating the connection terminals of the bus bar and the electronic circuit board can be prevented. An object is to provide a connection structure with a circuit board.

[0007]

In order to solve the above-mentioned problems, according to claim 1 of the present invention, an electronic circuit housing is provided in a part of an electric connection box for housing a bus bar, and the electronic circuit housing is housed in the electronic circuit housing. In an electric connection box with an electronic circuit for electrically connecting a circuit section of an electronic circuit board and a bus bar housed in the electric connection box, a connection for connecting the circuit section of the electronic circuit board and a tab provided on the bus bar A housing for accommodating terminals is attached to an electronic circuit board, wherein a rib for preventing misassembly is provided on the housing, and a slit into which the rib fits is formed on the electronic circuit board. A connecting structure between a bus bar and an electronic circuit board in an electric connection box with an electronic circuit, characterized in that the formation position of the is changed according to the arrangement of the connection terminals accommodated in the housing. Than it is.

According to the first aspect of the present invention, the rib is formed by changing the forming position of the misassembly preventing rib according to the arrangement of the connection terminals housed in the housing and forming the slit corresponding to the rib on the electronic circuit board. When the formation positions of the slit and the slit do not match, the rib cannot be fitted in the slit.
That is, since the housing cannot be attached to the electronic circuit board, erroneous assembly of the housing can be prevented.

The rib for preventing misassembly of the housing is hinged so as to be swingable in the width direction so as to be locked at each swing position, and by the movable rib, the rib forming position of the housing is formed. Can be changed. (Claim 2) According to claim 2, the mis-assembly preventing rib of the housing is a movable rib that can be swung by a hinge so that the rib forming position can be changed so that the rib forming position is changed. Even if you do not prepare several types, you can respond by simply changing the formation position of the slit of the electronic circuit board,
The number of housings can be reduced and the cost can be reduced.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 3 and 4, the electrical junction box 10 includes a rectangular box-shaped lower case 11 and an upper case 12 made of synthetic resin.
When the upper case 12 is covered with the upper case 12, the lock claws 12b on the outer surface of the upper case 12 are engaged with the lock claws (not specifically shown) on the outer surface of the lower case 11, respectively. Is locked.

On the upper surface of the lower case 11, a bus bar 13 having a tab 13a protruding upward is set from above and positioned and accommodated. A bus bar pressing cover 18 for pressing the bus bar 13 from above to the upper surface of the lower case 11 may be provided.

The electronic circuit board 14 accommodated in the electronic circuit accommodating portion set above the bus bar 13 is formed in a rectangular shape. Various electronic components 15, ..., 15 are attached to the upper surface of the electronic circuit board 14,
A printed circuit (not specifically shown) for electrically connecting the electronic components 15 is formed on the lower surface of the.
On the outer periphery (two sides in this example) on both sides of the upper surface of the electronic circuit board 14, a circuit portion 14 continuous from the printed circuit is formed.
a and 14a are formed.

On the other hand, substantially harmonica-shaped synthetic resin housings 16 and 16 are provided, and connection terminals 17 are accommodated in a large number of terminal accommodating chambers 16a arranged in parallel with each housing 16. Each of the connection terminals 17 is formed by bending a conductive metal plate, and has a side opening formed in the upper part thereof so as to be fitted laterally to the circuit portion 14a on the outer periphery of the electronic circuit board 14 and electrically connected thereto. The electronic circuit side electrical connection portion 17a of the lower case 11 is provided at the lower portion thereof with the tab 13a of the bus bar 13 of the lower case 11.
Is provided with a bus bar-side electric connecting portion 17b having an opening on the lower surface, which is fitted from above and electrically connected to both electric connecting portions 17a,
17b is the orthogonal direction.

As shown in detail in FIGS. 2A, 2C, and 2D, one of the housings 16 is one of the housings 16.
The terminal accommodating chamber 16a of (A) is front [state of FIG. 2 (A)].
As seen from the left, the fifth and eleventh pieces from the left are empty (none), and the narrow mis-assembly preventing ribs 16b, 1 are provided in this portion.
6c are provided respectively. Further, as shown in detail in FIG. 2 (B), the terminal accommodating chamber 16a of the other housing 16 (B) among the above housings 16 has a front surface [FIG.
As seen from the state (B)], the sixth and eleventh pieces from the left are empty (absent), and narrow-width mis-assembly preventing ribs 16d and 16e are respectively provided in this portion.

On the other hand, as shown in FIG. 1, the ribs 16b, 1 are provided on the circuit portion 14a (A) on the outer periphery of one side of the electronic circuit board 14 to which the one housing 16 (A) is attached.
The slits 14b and 14c into which the ribs 16b and 16c fit, respectively, are formed at positions corresponding to 6c, and the circuit portion 14a around the other outer periphery of the electronic circuit board 14 to which the other housing 16 (B) is attached is formed. In (B),
The ribs 1 are provided at positions corresponding to the ribs 16d and 16e.
Slits 14d and 14e into which 6d and 16e are fitted are formed. Each of the housings 16 (A, B) is preliminarily set on the electronic circuit board 14 by fitting the electronic circuit side electrical connection portions 17a of the accommodated connection terminals 17 into the circuit portion 14a of the electronic circuit board 14 from the side. To do.

As shown in FIGS. 3 and 4, the upper shoulder of the upper case 12 is pressed against the upper surface of each housing 16 when the upper case 12 is covered with the lower case 11 and locked. The portions 12c and 12c are formed so that the housings 16 are pressed against the upper surface of the bus bar 13 by the pressing shoulders 12c.

When assembling the electronic circuit board 14 in the electric connection box 10, the connection terminals 17 are housed in the terminal housing chambers 16a of the housings 16 (A, B), and then the electronic circuit board 1 is mounted.
4, each housing 1 is attached to each circuit portion 14a on the outer periphery on both sides of
6 (A, B) and the electronic circuit side electrical connection portion 17a of the connection terminal 17 are fitted together from the side and set.

At this time, the slits 1 of the ribs 16b, 16c and 16d, 16e of the housings 16 (A, B) and the circuit portions 14a (A, B) around the outer periphery of the electronic circuit board 14 are formed.
When the formation positions of 4b, 14c and 14d, 14e coincide, ribs 16b, 16 are formed in slits 14b, 14c.
Since the ribs 16d and 16e can be fitted to the c and the slits 14d and 14e, respectively, each housing 16 (A, B)
A circuit portion 14a (A, B) around each outside of the electronic circuit board 14
Can be installed smoothly on.

On the contrary, the ribs 16b, 16c and 16d, 16e of each housing 16 (A, B) and the electronic circuit board 14
14 of the circuit part 14a (A, B) around each outer periphery
When the formation positions of b, 14c and 14d, 14e do not coincide, for example, one housing 16 (A) may be erroneously fitted to the circuit portion 14a (B) of the other outer periphery of the electronic circuit board 14. And the other housing 16
(B) is a circuit portion 14a on one outer periphery of the electronic circuit board 14
When it is attempted to erroneously fit into (A), the ribs 16d and 16e and the slit 14 are provided in the slits 14b and 14c.
Since the ribs 16b and 16c cannot be fitted to the d and 14e, respectively, the housings 16 (A and B) cannot be fitted to the electronic circuit board 14
Cannot be attached to the circuit portions 14a (A, B) around the outer periphery of each. As a result, each housing 16 (A, B)
It becomes possible to prevent erroneous assembly.

Next, the bus bar side electrical connection portion 17b of the connection terminal 17 housed in each housing 16 (A, B) together with the electronic circuit board 14 is fitted from above onto the tab 13a of the bus bar 13 set on the upper surface of the lower case 11. While doing so, the electronic circuit board 14 is set on the upper surface of the lower case 11.

After that, the lower case 11 is covered with the upper case 12, and each of the housings 16 is attached to each of the pressing shoulders 12c.
When (A, B) is pressed against the upper surface of the bus bar 13, as shown in FIG.
As shown in, the electronic circuit board 14 is automatically fixed in the lower case 11 and the upper case 12.

As shown in FIGS. 5A to 5C, the misassembly preventing rib 16f provided on each housing 16 is hinged by a thin hinge portion 16g so as to be swingable in the width direction. At the swinging positions a and b, the locking projections 16h of the movable rib 16f are engaged with the locking recesses 16i and 16j to lock the ribs 16f of each housing 16.
When the formation position is swung to the swing position a, for example, the fourth terminal storage chamber 16a from the right becomes the rib 16f, and when swung to the swing position b, the fifth terminal storage chamber from the right. 16
a becomes the rib 16f.

Then, as shown in FIG. 5D, the slit 14f of the circuit portion 14a of the electronic circuit board 14 is formed from the right to 4
If formed in the fourth circuit portion 14a, the housing 16 in which the movable rib 16f is swung can be attached to the fourth terminal accommodating chamber 16a from the right, and as shown in FIG. The slit 14f of the circuit portion 14a of the plate 14
Is formed in the fifth circuit portion 14a from the right, the housing 16 in which the movable rib 16f is swung can be attached to the fifth terminal accommodation chamber 16a from the right.

As described above, the ribs of the housing 16 are the movable ribs 16f, and the formation positions of the ribs 16f can be changed, so that it is not necessary to prepare many kinds of housings 16 in which the formation positions of the ribs 16f are changed. , Electronic circuit board 1
Since it can be dealt with only by changing the formation position of the slit 14f of No. 4, the number of types of the housing 16 can be reduced and the cost can be reduced.

[0025]

As is apparent from the above description, according to claim 1 of the present invention, the formation position of the misassembly preventing rib is changed according to the arrangement of the connection terminals accommodated in the housing, and the rib is adapted to this rib. Since the slits are formed on the electronic circuit board, the housing cannot be attached to the electronic circuit board when the ribs and the slits are not formed at the same positions, so that the erroneous assembly of the housing can be prevented.

If the ribs for preventing misassembly of the housing are movable ribs so that the rib forming positions can be changed, various types of housings having different rib forming positions can be prepared. Even if it is not necessary, it can be dealt with only by changing the positions where the slits of the electronic circuit board are formed, so that the number of types of housings can be reduced and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded plan view of a housing and an electronic circuit board of the present invention.

2A and 2B are front views of a housing, FIG. 2C is a sectional view taken along line EE, and FIG. 2D is a sectional view taken along line FF.

FIG. 3 is an exploded side sectional view of an electric junction box.

FIG. 4 is a side sectional view of the electric junction box in an assembled state.

FIG. 5 is a modification of the housing and the electronic circuit board,
(A) is a partial front view of the housing, (B) is G of (A)
-G line sectional view, (C) is a H-H line sectional view of (B),
(D) and (E) are some top views of an electronic circuit board, respectively.

FIG. 6 is a conventional electric junction box, in which (A) is an exploded perspective view of the electric junction box and the case, (B) is a partial side sectional view of the electric junction box and the case in an assembled state, and (C). [Fig. 4] is a side view of a connection terminal.

FIG. 7A is a cross-sectional view of a prior art electrical junction box,
(B) is an exploded plan view of the housing and the electronic circuit board.

[Explanation of symbols]

 10 Electrical Connection Box 11 Lower Case 12 Upper Case 13 Bus Bar 13a Tab 14 Electronic Circuit Board 14a Circuit Part 14b to 14e Slit 14f Slit 16 Housing 16b to 16e Misassembly Preventing Rib 16f Misassembly Preventing Movable Rib 17 Connection Terminal

Claims (2)

[Claims] 1. An electronic circuit accommodating portion is provided in a part of an electric connection box accommodating a bus bar, and a circuit portion of an electronic circuit board accommodated in the electronic circuit accommodating portion and a bus bar accommodated in the electric connection box are electrically connected. In an electric connection box with an electronic circuit to be connected to an electronic circuit board, a housing accommodating a connection terminal for connecting a circuit portion of the electronic circuit board and a tab provided on the bus bar is attached to the electronic circuit board. A rib for preventing assembly is provided, a slit into which the rib is fitted is formed in the electronic circuit board, and the positions where the corresponding rib and slit are formed are changed according to the arrangement of the connection terminals accommodated in the housing. And a connection structure between a bus bar and an electronic circuit board in an electric connection box with an electronic circuit. 2. The rib for preventing erroneous assembly of the housing comprises:
The electronic circuit according to claim 1, wherein the movable circuit is hinged so as to be swingable in the width direction so as to be locked at each swing position, and the movable rib changes the position where the rib of the housing is formed. Connection structure between the bus bar and the electronic circuit board in the electric junction box.