JP3352945B2 - Connection structure between wiring material of electrical junction box and printed circuit board of electronic unit - 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 member for connecting an electric wire to a printed circuit board, and uses the terminal member to connect a wiring member of an electric connection box to a printed circuit board of an electronic unit. It relates to a structure for connection.

[0002]

2. Description of the Related Art An electronic unit including various electronic components and a printed circuit board is mounted on an electrical junction box (junction box) provided in an automobile or the like. The electronic unit is connected to a bus bar, an electric wire, or the like, which is a wiring material of the electric junction box.

[0003] In recent years, with the advancement of electronics in automobiles, there has been an increasing demand for miniaturization and cost reduction of electronic units and electric junction boxes. A printed circuit board of an electronic unit is directly mounted in the electric junction box. Furthermore, by adopting a structure in which the terminal portion of the wiring member and the printed circuit board are directly soldered, the connector is omitted and the number of parts is reduced, and the size and cost are reduced.

FIGS. 11 and 12 exemplify the above-mentioned conventional electric connection box. The electric connection box has a main body 1 having a board fixing portion 1a and an electric wire routing portion, and is attached to the upper and lower sides of the main body. An upper cover 2 and a lower cover 3 are provided.
A printed circuit board P to which a plurality of electronic components U,... Is mounted is mounted on the substrate fixing portion 1a. The wires W,..., Which are wiring members, are provided below the substrate fixing portion, and a plate-like terminal member T is fixed to the terminal portion in a vertically upright state as shown in FIG. This terminal member T
Are projected upward through the connection holes 7,... Of the board and soldered to the lands of the printed board.

[0005]

A terminal member (pressure contact terminal) T which is pressed against an electric wire W which is a wiring material of an electric junction box is stamped and formed into an elongated plate shape, and has a rectangular cross section. . Usually, in order to arrange a plurality of electric wires in parallel, the terminal members T are arranged on a line perpendicular to the longitudinal direction of the electric wires W, as shown in FIG. Therefore, in the conventional electric connection box, as shown in FIG. 14, the connection hole 7 of the printed circuit board and the copper foil portion (land)
Inevitably, the interval d of 8 had to be narrow, and there was no space between the lands for drawing the pattern.

For this reason, restrictions are imposed on the pattern design,
As a result, the printed circuit board area had to be increased, which led to an increase in the size of the electric junction box and an increase in cost.

If the width of the conventional plate-shaped terminal member is reduced, that is, if the longitudinal direction in the cross section of the terminal member is reduced, it is theoretically possible to increase the land interval on the printed circuit board. However, since the terminal member is generally punched out by a mold, the minimum width is limited. Therefore, in this case, it is necessary to manufacture the terminal member in a separate step such as etching, which increases the cost, which is not preferable.

Therefore, an object of the present invention is to change the direction of the terminal member of the electric wire to widen the space between the connection holes and the lands of the printed circuit board and to secure a space for passing the pattern between the terminals.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a multi-row electric wire provided in an electric junction box.
Wiring material and electronic unit mounted on electrical junction box
Connection structure with the printed circuit board part of
Formed into a bent plate shape for connecting the electric wire to the board part
Printed circuit board terminal members.
The terminal members are connected to the printed circuit board and
A press-fitting portion that has a groove into which the wire fits and is pressed against the wire.
And make sure that the connection surface is along the length of the wire.
Are attached to each wire while aligning
The contact portion is connected to the side of the connection portion, and is connected to the connection portion.
It is substantially perpendicularly bent against, the printed circuit board of the electronic unit, connecting hole connected to the connecting portion of the respective printed circuit board terminal member to be aligned in the direction of the row of wire
Disposed Te, between the lands of the connecting portion is disposed
Have at least one signal pattern
The wiring material of the electrical junction box and the printing of the electronic unit , wherein signal patterns are arranged at the intervals.
It is a connection structure with a substrate part .

[0010]

According to such a terminal member and a connection structure using the same, when a plurality of electric wires are arranged in parallel and each terminal member is connected to a printed board in a state where the terminal member is pressed against each electric wire, Since the connection portions of the terminal members adjacent to each other are arranged in parallel so that the plate surfaces thereof face each other, a sufficient space is provided between the connection holes of the printed circuit board corresponding to the terminal members. Can be taken. Therefore, a space for passing the pattern can be secured therebetween.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to the drawings. 1 to 3 show an embodiment of the present invention, in which an electric wire W is used as a wiring member of a printed circuit board P.
Is provided, and a pressure contact terminal A, which is a plate-shaped terminal member, is pressed against the terminal portion.

FIGS. 4 to 6 show a method of manufacturing the press contact terminal A. First, a metal plate rich in conductivity is punched out with a mold, and as shown in FIGS. 4 (a) and 4 (b). The developed shape of the press contact terminal is obtained. The unfolded material is cut from above and below on the same line at the center in the width direction.
The connection portion 12 is on the left side of the cuts 11a and 11b, and the press contact portion 13 is on the right side of the cuts 11a and 11b. The press contact portion 13 has slots 14a and 14b formed at the center in the width direction from above and below. The entrances of these slots 14a and 14b are chamfered so that the electric wires can be easily fitted.

This material is bent at a right angle with the cut portions 11a and 11b formed as boundaries, and FIG.
A bent body as shown in FIG. Next, the upper half of the press-contact portion 13 of the bent body is bent downward by 180 degrees at the folding line 15 in the figure, and the press-contact terminal A having a shape as shown in FIGS. 6 (a), (b) and (c). And In this state, the slots 14a and 14b overlap each other. These overlapping slots are grooves for press-contacting the electric wire, and the electric wire W is fitted into this portion and sandwiched from the left and right to be integrated with the electric wire.

In the press contact terminal A, since the plate surface of the connection portion 12 is bent 90 degrees in a plan view so as to extend along the longitudinal direction of the wire W fitted and pressed into the slots 14a and 14b. The dimension of the connecting portion 12 in the direction perpendicular to the direction of the drawing is only the thickness of the connecting portion 12, and is considerably smaller than the width of the connecting portion 12.

When the electric wires W are assembled in the electric junction box, a plurality of electric wires W connected to the press contact terminals A are arranged in parallel as described above and are supported by the insulating plate 5 or the like. In this case, since the plurality of plate-shaped press contact terminals A,... Are arranged in parallel so that their plate surfaces face each other, the interval between them is considerably wider than that of the conventional one.

The printed circuit board P superposed on the insulating plate 5 on which the electric wires are routed is provided with slit-shaped connection holes 7, through which the press contact terminals A,. The connection hole 7 has a long hole shape in the center line direction of the electric wire unlike the conventional one. The connection portion 12 of the press contact terminal A is projected upward from the connection hole 7. A land 8 from which the copper foil is exposed is formed around the connection hole 7, and a connection portion 12 of the press contact terminal A is soldered to the land 8. In the present invention, the plurality of press contact terminals A,... Are arranged in parallel so that their plate faces face each other. Therefore, as shown in FIG. An interval D through which at least one signal pattern 9 passes is ensured between 8, and the pattern 9 can be arranged between them.

That is, in the case of the conventional electric wire, the pressure contact terminal T
However, as shown in FIG. 13, since the plate surface was pressed so as to be orthogonal to the electric wire, the left and right width was wide, and a plurality of press-contact terminals were arranged in a row on the same surface orthogonal to the electric wire,
For this reason, there was almost no gap between the lands where the insulation displacement terminals were arranged, and the printed pattern could not be arranged. However, in the present invention, as shown in FIG. Since the surface is along the electric wire, the plurality of press-connecting terminals A,.
Are widened, and a space (D) is formed between adjacent lands that is sufficient for the layout of the print pattern.

The lands 8 can be arranged on one side or both sides of the printed circuit board P.

FIGS. 8 to 10 show another embodiment different from the above. In this embodiment, the pressure contact terminal A 'has a simpler structure than that of the previous embodiment. That is, the press contact terminal A 'is formed by punching a metal plate as shown in FIG.
A plate-shaped material having a shape as shown in FIGS. This material is divided into a left connecting portion 22 and a press contact portion 23 having a shorter length than the connecting portion, centering on a bending line 26 at a central portion in the width direction. Cuts 21a and 21b are formed in the bent line portion at the top and bottom,
The press contact portion 23 is provided with a slot 24.

This material is bent 90 degrees at the bending line F to obtain a press contact terminal A 'as shown in FIGS. 9 (a) and 9 (b). To fix this to the wire, use slot 2
4 may be fitted with an electric wire.

[0022]

As is apparent from the above description, in the terminal member according to the present invention, the press-contact portion for the electric wire is connected to the side of the connection portion to the printed circuit board, and is bent substantially at right angles to the connection portion. When connecting each wire to a printed circuit board via a terminal member in a state in which a plurality of wires are arranged in parallel, the connection portions of the terminal members adjacent to each other have their plate surfaces facing each other. Thus, at least one pattern can be arranged between the lands for connection with the electric wires on the printed circuit board. Therefore, an efficient pattern layout can be achieved, and the size of the printed circuit board can be reduced, and further, the size of the entire electric connection box can be reduced and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an external view of a disassembled state of an electric junction box body to which the present invention is applied.

FIG. 2 is a perspective view of the electric junction box main body in a printed circuit board assembled state.

FIG. 3 is a perspective view of a press contact terminal according to an embodiment of the present invention.

FIGS. 4A and 4B are a front view (a) and a plan view (b) of an unfolded state of the press contact terminal in a manufacturing stage.

FIG. 5 is a front view (a) and a plan view (b) of a state in which the connecting portion and the press contact portion are bent from each other from the above-described deployed state.

FIG. 6 is a front view (a), a plan view (b), and a side view (c) of a completed state of the press contact terminal.

FIG. 7 is a plan view of a land portion of a printed circuit board to which connection terminals are connected according to an embodiment of the present invention.

8A and 8B are a front view (a) and a plan view (b) of a press-fit terminal according to another embodiment in a developed state in a manufacturing stage.

9A and 9B are a front view and a plan view of a completed state of the press contact terminal.

FIG. 10 is a perspective view of the press contact terminal.

FIG. 11 is an explanatory view of a conventional electric junction box.

12A and 12B are an explanatory view of an assembling method in a conventional electric junction box and a perspective view in an assembled state of a printed circuit board.

FIG. 13 is a perspective view of a conventional press contact terminal.

FIG. 14 is a plan view of a land portion of a conventional printed circuit board.

[Explanation of symbols]

 A, A 'insulation displacement terminal P printed circuit board W electric wire 12, 22 connection part 13, 23 insulation displacement part

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-9-261821 (JP, A) JP-A-9-50835 (JP, A) JP-A-4-28189 (JP, A) JP-A 8- 222290 (JP, A) JP-A-8-227736 (JP, A) JP-A-8-37719 (JP, A) JP-A-10-255885 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H05K 7/14 H01R 4/24 H02G 3/16

Claims (1)

(57) [Claims] 1. A connection structure between a wiring member formed of a plurality of rows of electric wires provided in an electric connection box and a printed board portion of an electronic unit mounted on the electric connection box, wherein the printed board portion has the electric wires. Bent plate for connecting
And a printed circuit board terminal member connected to the printed circuit board portion.
Connection part and a groove for fitting the wire
And each of the pressure-contact portions is attached to each wire while the plate surface of the connection portion is aligned along the longitudinal direction of the wire, and the pressure-contact portion is connected to a side of the connection portion. And this connection
It is bent substantially at a right angle to the connecting portion, and a connection hole to be connected to the connection portion of each of the terminal members for the printed circuit board is formed in the printed circuit board portion of the electronic unit .
A signal path is arranged between the lands where the connection portions are arranged so as to be arranged in the row direction.
There is an interval where at least one turn passes, and the interval
A connection structure between a wiring member of an electric connection box and a printed circuit board of an electronic unit, wherein a signal pattern is arranged .