JP3363075B2 - Jumper structure of flexible printed circuit board - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jumper structure for a flexible printed circuit board, which allows easy connection of separate conductors.

[0002]

2. Description of the Related Art An electrical junction box used for branching and connecting a wire harness for an automobile to various electric components has branch connecting points concentrated at one place to branch and connect wiring reasonably and economically. With the increasing density of wire harnesses, various types have been developed depending on the vehicle type or application.

In some of the electric connection boxes as described above, a bus bar or a single wire circuit for a large current and a printed circuit board or a flexible printed circuit for a small current are stacked and accommodated.

[0004]

However, as shown in FIG.
As shown in (A), in the flexible printed circuit board 1, among the conductor portions a to o, adjacent conductor portions f, g, h,
Although i can be directly connected to each other by the connecting conductor q, the separated conductors b, j, k, and o shown by black circles cannot be directly connected.

On the other hand, as shown in FIG.
In the bus bar circuit 2 on the insulating plate 8, the conductor portions b and j that are separated from each other are provided.
, K and o can be directly connected to each other by the connecting conductor portion q, but conductor portions c to i and l to intersect the connecting conductor portion q.
Since n is connected to the conductors of the busbar circuit in the lower layer, the number of layers increases and the cost also increases. The printed circuit board is similar to the bus bar circuit.

The present invention has been made in order to solve the above-mentioned conventional problems, and an object thereof is to provide a jumper structure of a flexible printed circuit board in which distant conductor portions can be easily connected directly. is there.

[0007]

In order to solve the above problems, the present invention provides an electric wire-like jumper on a flexible printed circuit board obtained by coating an insulating film on both front and back surfaces of a sheet-like conductor portion. A jumper structure of a flexible printed circuit board, in which predetermined conductors of the flexible printed circuit board are connected to each other by a jumper, and insertion holes at connection ends of the jumper are formed vertically and horizontally corresponding to the conductors of the flexible printed circuit board. When a jumper block is installed, the connecting end of the jumper is inserted into the specified insertion hole of this jumper block in advance, and when the jumper block is applied to either the front or back surface of the flexible printed circuit board, the connecting end of the jumper is a conductor. That it can be inserted into the specified through hole There is provided a jumper structure of a flexible printed circuit board according to symptoms.

According to the present invention, the predetermined conductor portions of the flexible printed circuit board can be directly connected to each other by using the separate jumper. Also, provide a jumper block with vertical and horizontal insertion holes at the connection end of the jumper corresponding to the conductors of the flexible printed circuit board, and insert the connection end of the jumper into the specified insertion hole of this jumper block beforehand. Then, when the jumper block is applied to either the front surface or the back surface of the flexible printed circuit board, the connection end of the jumper can be inserted into a predetermined through hole of the conductor portion, which facilitates the assembly.

According to a second aspect of the present invention, the wire fitting groove corresponding to each of the insertion holes can be formed.

According to a third aspect of the present invention, the flexible printed circuit board has a bus bar circuit housed in an electric connection box, a single core wire circuit, or a laminated structure on the upper surface of the printed circuit board. It will not increase.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that parts having the same configurations and functions as those of the conventional technique are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 1 and 3 (A), when connecting the conductor parts b, j and k, o of the flexible printed circuit board 1 which are separated from each other, the conductor parts b, j and k, o are connected. As shown in detail in FIG. 2, through holes 3 are formed at predetermined positions b ', j', k ', and o', respectively, and insulating films 4a, 4 on both front and back surfaces of each through hole 3 are formed.
Holes 4c and 4c having a diameter larger than that of the through holes 3 of the conductor portions b, j and k and o are formed in b, and land portions 4d and 4d are formed on both front and back surfaces of the conductor portions b, j, k and o. Are provided respectively.

The terminals 6a of the connectors 6 and 6 for fitting the connector for the wire harness are connected to one end of each of the conductors a to o of the flexible printed circuit board 1, and the conductors a to o are connected. Each female terminal (not shown) of the connector 7 for inserting each tab terminal of the bus bar 2 of a lower layer is connected to the other end part of the. The tab terminals of the bus bar 2 in the lower layer may be directly connected to the other ends of the conductor portions a to o without providing the connector 7.

An electric wire-like jumper 5A having connecting end portions 5a and 5b corresponding to a distance T1 between predetermined positions b'and j'of the conductor portions a to o of the flexible printed circuit board 1.
And a wire-shaped jumper 5B having connection ends 5c and 5d that match the interval T2 between the predetermined positions k'and o '.

In each of the jumpers 5A and 5B, an electric wire is bent downward in a U-shape, the insulation at each bent end is peeled off, and the exposed conductors are used as the connection ends 5a to 5d. Alternatively, the conductive plate may be bent downward in a U-shape, and each bent end may be a connection end.

Of the jumpers 5A and 5B, the jumper 5A has one connecting end 5a inserted into the through hole 4c of the conductor b and the other connecting end 5b connected to the through hole 4c of the conductor j. insert. Similarly, the jumper 5B inserts one connection end portion 5c into the through hole 4c of the conductor portion k and inserts the other connection end portion 5d into the through hole 4c of the conductor portion o.

When the connection end portions 5a to 5d are soldered to the land portion 4d from the back surface side by flow soldering or the like, the conductor portion b,
The solder that has passed through the through holes 3 of j, k, and o also flows into the front surface side, and is also soldered to the land portion 4d on the front surface side.

In this way, the predetermined conductor parts b, j and k, o of the flexible printed circuit board 1 can be directly connected using the jumpers 5A, 5B, so that the circuit design of the flexible printed circuit board 1 can be improved. The degree of freedom is improved.

By stacking the flexible printed circuit board 1 on the bus bar circuit (or single core wire circuit) 2 on the insulating plate 8 housed in the electric connection box or on the upper surface of the printed circuit board, as shown in FIG. 3 (B). , The separated conductor portions b, j and k, o do not have to be directly connected to each other by the connecting conductor portion q as in the conventional case (see FIG. 6 (B)), so that the connecting conductor portion q intersects. Since the conductor parts c to i and 1 to n to be connected do not have to be connected to the conductor parts of the lower layer bus bar circuit, respectively, it is not necessary to increase the number of layers of the bus bar circuit 2 and the like.

As shown in FIGS. 4 and 5A, the connecting end portions 5 of the jumpers 5 (C to F) at various intervals are made to correspond to the conductor portions a to o of the flexible printed circuit board 1.
, 5e are formed vertically and horizontally, and a jumper block 6 made of synthetic resin is provided in which electric wire fitting grooves 6b, ... Corresponding to the respective insertion holes 6a are formed.

Then, the jumpers 5 (C to F) are preliminarily provided in predetermined insertion holes 6a of the jumper block 6.
When the connecting end portions 5e, 5e of the above are inserted and the jumper block 6 is applied to the upper surface of the flexible printed circuit board 1, as shown in FIG.
If the connection ends 5e and 5e of F) can be inserted into the predetermined through holes 3 of the conductors a to o, the jumper 5 (C to F) can be easily assembled to the flexible printed board 1. The jumper block 6 may have only the insertion holes 6a, ...

[0022]

As is clear from the above description, according to the present invention, the predetermined conductor portions of the flexible printed circuit board can be easily directly connected to each other by using the jumper, so that the flexibility of the circuit design of the flexible printed circuit board is reduced. It will improve.

Further, when the connecting end portion of the jumper is previously inserted into the insertion hole of the jumper block and the jumper block is applied to the flexible printed circuit board, the connecting end portion of the jumper can be inserted into a predetermined through hole of the conductor portion. , Assembling becomes easier and man-hours for assembling can be shortened.

Further, when the flexible printed circuit board is laminated on the bus bar circuit or the like housed in the electric connection box as in claim 3, the number of layers of the bus bar circuit or the like does not increase and the cost is not increased. Disappear.

[Brief description of drawings]

FIG. 1 is a perspective view of a jumper structure of a flexible printed circuit board according to the present invention.

FIG. 2 is a cross-sectional view of essential parts of a flexible printed circuit board to which jumpers are connected.

3A is a plan view of a flexible printed circuit board, and FIG. 3B is a plan view of a bus bar circuit.

FIG. 4 is a perspective view of a jumper block.

5A is a cross-sectional view of a main part before the jumper block is stacked on the bus bar circuit, and FIG. 5B is a cross-sectional view of the main part after the jumper block is stacked on the bus bar circuit.

FIG. 6 is a conventional example, (A) is a plan view of a flexible printed circuit board, and (B) is a plan view of a bus bar circuit.

[Explanation of symbols]

1 Flexible printed circuit board a to o conductor 2 busbar circuits 4a, 4b insulating film 5A, 5B jumper 6 jumper blocks

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Atsuhiro Togawa 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi Harness Institute of Technology Co., Ltd. (56) Reference JP-A-2-15582 (JP, A) JP-A-7-254789 (JP, A) JP-A-64-19795 (JP, A) JP-A-59-44775 (JP, A) Actually open 59-155764 (JP, U) Actually open 7-29887 (JP, U) Actual development Sho 60-116264 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01R 11/01

Claims (3)

(57) [Claims] 1. A flexible printed circuit board obtained by coating an insulating film on both sides of a sheet-shaped conductor portion.
A wire-like jumper to connect the specified conductors of the flexible printed circuit board to each other .
The flexible printed circuit board jumper structure
The corresponding flexible printed circuit board conductor,
Holes for connecting the jumper are formed vertically and horizontally.
A jumper block is provided and this jumper block
Insert the connecting end of the jumper into the specified insertion hole beforehand.
The jumper block with a flexible print base.
When you apply it to the front or back of the board,
You can insert the connection end into the specified through hole of the conductor.
The flexible printed circuit board jumper structure characterized by this . 2. An electric wire fit corresponding to each of the insertion holes.
The jumper structure for a flexible printed circuit board according to claim 1, wherein a groove is formed . 3. The jumper structure for a flexible printed circuit board according to claim 1, wherein the flexible printed circuit board is stacked on a bus bar or a single-core circuit housed in an electric connection box or on an upper surface of the printed circuit board.