JP3137912B2 - Printed circuit structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a printed circuit having a versatile circuit pattern.

[0002]

2. Description of the Related Art An electrical junction box used for branch connection of an automobile wire harness or the like to various electrical components has a branch connection point concentrated in one place, and the wiring is rationally and economically branched. With the increase in the density of wire harnesses, various types have been developed according to vehicle types or applications.

FIG. 7A shows an electrical connection box as described above.
As shown in FIG. 7, a printed circuit board 2 on which a flexible printed circuit 1 having a circuit formed of conductive foil is fixed is accommodated.
As shown in (B), a board 4 to which a bus bar circuit 3 having a circuit formed by a bus bar punched out of a brass plate is fixed is housed. In addition, although not specifically shown, a board to which an electric wire circuit configured by electric wires is fixed is housed.

[0004]

However, in the conventional printed circuit, bus bar circuit, and electric wire circuit, only fixed circuit patterns can be formed, so that the circuit has no versatility. Although the configuration of the electric wire circuit can slightly change the circuit pattern, the wiring requires a long working time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to provide a printed circuit structure having a versatile circuit pattern.

[0006]

In order to solve the above-mentioned problems, a first aspect of the present invention is a flexible printed circuit having a circuit formed of conductive foil, wherein the circuit is formed in a grid pattern. The pitch of the intersection of the lattice-shaped circuit is set to the pitch of the male terminals of the connector, and a male terminal insertion hole is formed in the intersection, and this intersection, leaving a necessary part in the circuit configuration, While unnecessary portions are cut off, a plurality of printed circuits are laminated, and at the corresponding intersection of a printed circuit other than a printed circuit having an intersection where the male terminal is inserted into the male terminal insertion hole and soldered,
An object of the present invention is to provide a printed circuit structure characterized in that an escape hole larger than soldering is formed. According to the first aspect, various circuit patterns can be freely formed from the lattice-shaped circuit only by cutting off unnecessary parts from the circuit formed in the lattice shape, leaving unnecessary parts in the circuit configuration. Become like Since the pitch of the intersection of the lattice circuit is set to the pitch of the male terminal of the connector and the male terminal insertion hole is formed at the intersection, the terminal of the connector portion can be directly connected to the terminal insertion hole. Furthermore, a plurality of printed circuits are stacked, and a male terminal is inserted into the male terminal insertion hole, and a relief hole larger than soldering is provided at a corresponding intersection of a printed circuit other than a printed circuit having an intersection for soldering. Once formed, the escape holes prevent the male terminals and soldering from contacting the grid-like circuit of the printed circuit that does not require soldering.

According to a second aspect of the present invention, there is provided a flexible printed circuit having a circuit formed of conductive foil, wherein the circuit is formed in a lattice pattern, and the pitch of the intersection of the lattice circuit is the male terminal of the connector. A male terminal insertion hole is formed at this intersection, and this intersection is cut off, leaving unnecessary parts in the circuit configuration, while unnecessary parts are cut off. A through hole smaller than soldering is formed at a corresponding intersection of a printed circuit other than a printed circuit having an intersection where the male terminal is inserted into the male terminal insertion hole and soldered. And a printed circuit structure. According to the second aspect, it is possible to freely configure various circuit patterns from the lattice-shaped circuit only by removing the unnecessary part from the circuit formed in the lattice and cutting off the unnecessary part. Become like Since the pitch of the intersection of the lattice circuit is set to the pitch of the male terminal of the connector and the male terminal insertion hole is formed at the intersection, the terminal of the connector portion can be directly connected to the terminal insertion hole. Furthermore, by laminating a plurality of printed circuits, a male terminal is inserted into the male terminal insertion hole, and a through hole smaller than soldering is formed at a corresponding intersection of a printed circuit other than a printed circuit having an intersection where the solder is inserted. When soldered to the male terminal at the intersection of the printed circuit having through-holes, the soldering passes through the through-hole and also contacts the intersection of the grid-like circuit of the printed circuit without through-hole. Therefore, the male terminal can be connected to the intersection of both lattice circuits at the same time.

According to a third aspect of the present invention, there is provided a flexible printed circuit having a circuit formed of conductive foil, wherein the circuit is formed in a lattice shape, and a pitch of an intersection of the lattice circuit is a male terminal of the connector. A male terminal insertion hole is formed at this intersection, and this intersection is cut off, leaving unnecessary parts in the circuit configuration, while unnecessary parts are cut off. Then, a semicircular through hole smaller than soldering, and a semicircular larger than soldering are provided at the intersection of the printed circuit having an intersection where the male terminal is inserted into the male terminal insertion hole and soldered. Are formed at the corresponding intersections of the printed circuit other than the printed circuit, at positions opposite to the respective through holes, a semicircular through hole larger than soldering, and a half hole larger than soldering. circular It is intended to provide a structure of a printed circuit, characterized in that the through hole is formed. According to the third aspect, it is possible to freely configure various circuit patterns from the lattice-like circuit only by cutting off unnecessary parts in the circuit configuration, leaving necessary parts in the circuit configuration. Become like Since the pitch of the intersection of the lattice circuit is set to the pitch of the male terminal of the connector and the male terminal insertion hole is formed at the intersection, the terminal of the connector portion can be directly connected to the terminal insertion hole. Further, a plurality of printed circuits are stacked, and a semicircular through-hole smaller than soldering is formed at a crossing portion of the printed circuit having a crossing portion where the male terminal is inserted into the male terminal insertion hole and soldered. To form a larger semicircular through hole,
Since a semicircular through-hole larger than soldering and a semi-circular through-hole larger than soldering were formed at the corresponding intersections of the printed circuit other than this printed circuit, at positions opposite to the respective through-holes. When soldering to the male terminal at the intersection of one printed circuit, this soldering passes through each through hole and also contacts the intersection of the other printed circuit, and the soldering of the intersection of the other printed circuit. When the male terminal is soldered, the soldering passes through each through hole and also contacts the intersection of one of the lattice circuits, so that the male terminal can be simultaneously connected to the intersection of both lattice circuits.

[0009]

[0010]

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 2, the printed circuit 5 is formed by applying insulating coatings 5b, 5b on the front and back of a conductive foil 5a, and has flexibility.

As shown in FIG. 1A, in the printed circuit 5, a grid-like circuit 5A is formed by a conductive foil 5a, and each pitch P of an intersection 5c of the grid-like circuit 5A is defined by an electric connection box. Connector fitting portion 6 of case 6 (see FIG. 4B)
The pitch size P of the male terminal 7a is set.

Each of the intersecting portions 5c of the lattice circuit 5A is formed with a penetrating terminal insertion hole 5d, and the periphery of the lattice circuit 5A is formed around the lattice circuit 5A.
Is formed on each of the female terminals.

As shown in FIG. 1B, in the lattice circuit 5A, in order to obtain necessary circuit patterns 5B, 5C and 5D, a necessary portion of the conductive foil 5a is left, and each crossing portion 5c is left. A punching hole 5f is formed in the unnecessary portion of the conductive foil 5a by a press or the like and cut off. As a result, necessary circuit patterns 5 as shown in the upper part of FIG.
B, 5C, and 5D can be obtained.

In the case of the printed circuit 5 as described above, a necessary portion is left in the circuit configuration from the lattice circuit 5A.
Various circuit patterns 5B, 5C and 5D can be freely formed from the lattice circuit 5A only by cutting off unnecessary portions.

The printed circuit 5 is housed in a case 6 of an electric junction box as shown in FIG. Then, each male terminal 7 is press-fitted into each terminal press-fit portion 6d of the connector fitting portion 6a of the case 6, and the leg 7a of each male terminal 7 is
After being inserted into the terminal insertion hole 5d of A, each leg 7a is soldered to the lattice circuit 5A.

As described above, the terminal press-fitting portion 6d on the case 6 side
After press-fitting the male terminal 7 into the
The stress when the external connector is fitted to the connector fitting portion 6a does not act on the soldered portion a.

As shown in FIG. 4A, the printed circuit 5
When the connector 8 is connected by pulling out the extension 5g extended from the case 6 to the outside of the case 6, it can be used as a harness, and another connecting part such as a harness or a connector is unnecessary, and the number of parts can be reduced.

Further, as shown in FIG.
Is bent along the upper surface (or lower surface) 6b and the side surface 6c of the male terminal 7 of the connector fitting portion 6a of each surface 6b, 6c.
Is directly connected by soldering a to the upper surface (or lower surface) of the case 6 and the side surface 6c in a three-dimensional manner.
Can be provided, and the electric junction box can be downsized.

FIGS. 5 and 6 show a plurality of sheets (two sheets in this example).
Male terminal 7 when the above printed circuit boards 5, 5 'are stacked
This is the connection method.

FIGS. 5A and 5B show a method in which the male terminal 7 is connected only to the intersection 5c of the lattice circuit 5A of the upper printed circuit 5, and the lattice circuit of the lower printed circuit 5 '. Solder the male terminal 7 to the intersection 5c 'of 5A'.
A larger relief hole 5h 'is formed. This escape hole 5
h ′, the lattice circuit 5 of the lower printed circuit 5 ′
The male terminal 7 and the soldering a do not contact A '.

FIGS. 5C and 5D show the male terminal 7 only at the intersection 5c of the lattice circuit 5A 'of the lower printed circuit 5'.
Is formed at the intersection 5c of the lattice circuit 5A of the upper layer printed circuit 5 with a relief hole 5h larger than the soldering a of the male terminal 7. The escape hole 5h allows the male terminal 7 to be connected to the lattice circuit 5A of the upper printed circuit 5.
And soldering a does not contact.

FIGS. 6A and 6B show a method of simultaneously connecting the male terminal 7 to the intersections 5c and 5c 'of the lattice circuits 5A and 5A' of the upper and lower printed circuits 5 and 5 '. Then, the soldering a is soldered to the male terminals 7 from above from the intersections 5c of the upper lattice circuit 5A, and the through holes 5i smaller than the soldering a are soldered to the intersections 5c 'of the lower lattice circuit 5A'. 'Form.

When the male terminal 7 is soldered to the male terminal 7 from below through the through-hole 5i 'at the intersection 5c' of the lower layer, the soldering a 'passes through the through-hole 5i' and the lattice circuit of the upper layer. The contact is also made at the intersection 5c of 5A, so that the male terminal 7 can be simultaneously connected to the intersections 5c, 5c 'of both lattice circuits 5A, 5A'.

FIGS. 6C and 6D show another method of simultaneously connecting the male terminal 7 to the intersections 5c and 5c 'of the lattice circuits 5A and 5A' of the upper and lower printed circuits 5 and 5 '. At the intersection 5c of the upper lattice circuit 5A, a semicircular through hole 5i smaller than the soldering a, and a soldering a
And a larger semicircular through-hole 5j,
At a crossing portion 5c 'of the lower lattice circuit 5A', a semicircular through hole 5i 'larger than soldering a and a semicircular shape larger than soldering a are provided at positions opposite to the through holes 5i and 5j. Is formed.

When the male terminal 7 is soldered from above to the intersection 5c of the upper lattice circuit 5A, the soldering a passes through the through holes 5i and 5j and passes through the lower lattice circuit 5A. When the male terminal 7 is soldered from below to the intersection 5c 'of the lower lattice circuit 5A' while contacting the intersection 5c ', the soldering a' is inserted into each through hole 5i '. , 5j 'through the upper lattice circuit 5A.
, The two grid-like circuits 5A, 5A,
The male terminals 7 can be simultaneously connected to the intersections 5c, 5c 'of 5A'.

In the embodiment shown in FIGS. 5 and 6, both the upper and lower printed circuits 5A and 5A of the printed circuits 5A and 5A are used.
Although the male terminal 7 is simultaneously connected to the intersections 5c, 5c 'of A', the present invention is not limited to the printed circuits 5, 5 'having the lattice circuits 5A, 5A'.
It is needless to say that the present invention can be applied to a stacked printed circuit 1 having a normal circuit as shown in FIG. Further, it is needless to say that the lamination is not limited to two layers, but can be applied to three or more layers.

[0029]

As is apparent from the above description, the first aspect of the present invention is only the operation of cutting off unnecessary portions from a circuit formed in a lattice shape while leaving necessary portions in the circuit configuration. Thus, various circuit patterns can be freely configured from the lattice circuit. Since the pitch of the intersection of the lattice circuit is set to the pitch of the male terminal of the connector and the male terminal insertion hole is formed at the intersection, the terminal of the connector portion can be directly connected to the terminal insertion hole. Furthermore, a plurality of printed circuits are stacked, and a male terminal is inserted into the male terminal insertion hole, and a relief hole larger than soldering is provided at a corresponding intersection of a printed circuit other than a printed circuit having an intersection for soldering. Once formed, the escape holes prevent the male terminals and soldering from contacting the grid-like circuit of the printed circuit that does not require soldering.

According to a second aspect of the present invention, various circuit patterns can be formed from a grid-like circuit only by cutting off unnecessary portions from the circuit formed in a grid-like form, leaving necessary parts in the circuit configuration. It can be configured freely. Also,
Since the pitch of the intersection of the lattice circuit is set to the pitch of the male terminal of the connector and the male terminal insertion hole is formed at the intersection, the terminal of the connector portion can be directly connected to the terminal insertion hole. Furthermore, by laminating multiple printed circuits,
Since a through hole smaller than soldering was formed at a corresponding intersection of a printed circuit other than a printed circuit having an intersection where the male terminal is inserted into the male terminal insertion hole and soldered, a printed circuit having a through hole is formed. When soldering to the male terminal at the intersection, this soldering passes through the through hole,
Since the contact portion also contacts the intersection of the lattice circuits of the printed circuit having no through hole, the male terminal can be simultaneously connected to the intersection of both lattice circuits.

According to a third aspect of the present invention, a variety of circuit patterns can be formed from a lattice-shaped circuit by simply cutting off unnecessary parts from the circuit formed in the lattice, leaving unnecessary parts in the circuit configuration. It can be configured freely. Also,
Since the pitch of the intersection of the lattice circuit is set to the pitch of the male terminal of the connector and the male terminal insertion hole is formed at the intersection, the terminal of the connector portion can be directly connected to the terminal insertion hole. Furthermore, by laminating multiple printed circuits,
At the intersection of the printed circuit having an intersection where the male terminal is inserted into the male terminal insertion hole and soldered, a semicircular through hole smaller than soldering and a semicircular through hole larger than soldering are provided. Formed, at a corresponding intersection of a printed circuit other than this printed circuit, a semicircular through hole larger than soldering, and a semicircular through hole larger than soldering at positions opposite to the above through holes. Then, when soldering to the male terminal at the intersection of one printed circuit, this soldering passes through each through hole and also contacts the intersection of the other printed circuit, and When soldering to the male terminal at the intersection, this soldering passes through each through hole and also contacts the intersection of one lattice circuit, so the male terminal is connected to the intersection of both lattice circuits at the same time it can.

[0032]

[Brief description of the drawings]

FIG. 1A is a perspective view of a printed circuit according to the present invention, in which FIG. 1A is a perspective view before cutting off unnecessary parts, and FIG. 1B is a perspective view after cutting off unnecessary parts.

FIG. 2 is an enlarged sectional view of a printed circuit.

FIG. 3 is a cross-sectional view of a procedure for connecting a male terminal from the outside of the case to a printed circuit in the case.

4A is a perspective view of a printed circuit having an extension, and FIG. 4B is a cross-sectional view of the bent printed circuit.

5A and 5B are connection structures of male terminals of a stacked printed circuit board, in which FIG. 5A is a cross-sectional view in which male terminals are connected to an upper-layer printed circuit board, FIG. Is a cross-sectional view in which male terminals are connected to a lower printed circuit board, and (D) is (C).
FIG.

6A and 6B are cross-sectional views of a connection structure of male terminals of a stacked printed circuit board, in which male terminals are simultaneously connected to upper and lower printed circuit boards, and FIG. 6B is a cross-sectional view taken along line CC of FIG. FIG. 9C is a cross-sectional view of another example in which male terminals are simultaneously connected to the upper and lower printed circuit boards, and FIG. 10D is a cross-sectional view taken along line DD of FIG.

7 (A) is a perspective view of a printed circuit, and FIG. 7 (B) is a perspective view of a bus bar circuit.

[Explanation of symbols]

 5, 5 'printed circuit 5A, 5A' lattice circuit 5B to 5D circuit pattern 5c intersection 5d terminal insertion hole 5i, 5j through hole 6 case 6a connector fitting portion 7 male terminal a soldering

Continuation of front page (72) Inventor Takahiro Onizuka 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi Harness Research Institute, Inc. (56) References JP-A-56-130989 (JP, A) 3-159186 (JP, A) Japanese Utility Model 1983-11876 (JP, U) Japanese Utility Model Application Hei 4-790 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H05K 1/02 H01R 12/32 H02G 3/16 H05K 3/20 H05K 3/22

Claims (3)

(57) [Claims] 1. A flexible printed circuit comprising a circuit made of conductive foil, wherein the circuit is formed in a grid pattern, and an intersection of the grid circuit is provided.
The pitch of the part is set to the pitch of the male terminal of the connector,
A male terminal insertion hole is formed at this intersection, and
In the crossing part of the circuit, while leaving the necessary part due to the circuit configuration, the unnecessary part is cut off, while the printed circuit is
Insert the male terminal into the male terminal insertion hole and solder
Printed circuit other than the printed circuit having the intersecting intersection
Larger clearance holes than soldered at corresponding intersections of roads
The structure of a printed circuit, characterized in that a printed circuit is formed . 2. A flexible printed circuit composed of conductive foil.
Circuit, wherein the circuit is formed in a grid pattern, and the intersection of the grid circuit is
The pitch of the part is set to the pitch of the male terminal of the connector,
A male terminal insertion hole is formed at this intersection, and
Crossing part is unnecessary, leaving the necessary part in the circuit configuration
Parts are cut off, while the printed circuit is
Insert the male terminal into the male terminal insertion hole and solder
Printed circuit other than the printed circuit having the intersecting intersection
Through holes smaller than soldered at corresponding intersections of roads
The structure of a printed circuit, characterized in that a printed circuit is formed . 3. A flexible printed circuit composed of conductive foil.
Circuit, wherein the circuit is formed in a grid pattern, and the intersection of the grid circuit is
The pitch of the part is set to the pitch of the male terminal of the connector,
A male terminal insertion hole is formed at this intersection, and
Crossing part is unnecessary, leaving the necessary part in the circuit configuration
Parts are cut off, while the printed circuit is
Insert the male terminal into the male terminal insertion hole and solder
At the intersection of the printed circuit
Semi-circular through-hole smaller than padding and soldering
A large semicircular through hole is formed and
At the corresponding intersection of the printed circuit other than the printed circuit.
At the position opposite to each through hole, a semicircular
Through holes and semicircular through holes larger than soldering are formed
The structure of a printed circuit characterized by being performed .