JPH0745342A - Flexible flat cable structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a flexible flat cable structure that not only makes the pressure welding process unnecessary but also eliminates the need for sockets and plugs directly attached to the board, resulting in a low cost harness product. It is in. [Structure] Flat conductors 2 each having a terminal portion 3 formed at one end are arranged at a constant pitch, insulating films 4 and 5 are adhered from both sides of the flat conductor 2, and the flattening is performed by these insulating films 4 and 5. The conductor 2 is fixed, the terminal portion 3 is projected outward from one end edge of the insulating films 4 and 5, and the flat conductor 2 on the other end edge side of at least one insulating film 4 is also provided.
This is a flexible flat cable structure in which the surface portion of is exposed to form the contact portion 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible flat cable structure for connecting printed circuit boards.

[0002]

2. Description of the Related Art Conventionally, when connecting printed circuit boards with a flat cable, as shown in FIG.
The socket 51 is pressure-connected to one end of the
A harness article 50 in which a board-mounted socket 52 is pressure-connected to the other end of the board is prepared, the socket 52 is mounted on one printed board 53, and the other printed board 54 is mounted.
On the other hand, the other plug 55 was mounted, and the socket 51 was inserted into the plug 55.

[0003]

However, in the connection structure as described above, the socket 51 and the substrate direct mounting type socket 52 must be pressure-contacted to the end of the harness 56, and the pressure-contacting step is not required. Not only is it necessary
The socket 51 and the board direct mounting type socket 52 are required, and there is a problem in that the cost of the harness article 50 is high, and the harness 56 that requires branching.
There was a problem that I could not deal with.

The present invention was made in view of the above problems, and its first object is not only to eliminate the need for a pressure welding step but also to directly mount a socket and a substrate. It is an object of the present invention to provide a flexible flat cable structure that does not require a socket and is a harness product that is low in cost.

A second object of the present invention is to provide a flexible flat cable structure in which the contact portion is less likely to be deformed by the reinforcing member and the contact portion can be easily inserted and connected to the connector. Especially.

A third object of the present invention is to provide a flexible flat cable structure which can cope with a harness which requires branching.

A fourth object of the present invention is to provide a flexible flat cable structure which enables a multi-pole connector.

A fifth object of the present invention is to provide a flexible flat cable structure which not only enables a multi-pole connector but also eliminates the need for a connector.

[0009]

In order to achieve the above-mentioned first object, the present invention arranges flat conductors having a terminal portion at one end portion at a constant pitch, and Insulating films are stuck together, flat conductors are fixed with these insulating films, the terminal portion is projected outward from one end edge portion of the insulating film, and at least one flat end portion of the flat conductor on the other end edge side of the insulating film is attached. It is characterized in that the surface portion is exposed to form a contact portion.

In order to achieve the above-mentioned second object, according to the present invention, flat conductors having terminal portions formed at one end are arranged at a constant pitch, and insulating films are adhered from both surfaces of the flat conductors. , Fixing the flat conductor with these insulating films, projecting the terminal portion to the outside from one end edge portion of the insulating film, and at least exposing the surface portion of the flat conductor on the other end edge side of one insulating film. A contact portion is provided, and a reinforcing member is provided on the back side of the contact portion.

In order to achieve the above-mentioned third object, according to the present invention, flat conductors having a terminal portion formed at one end are arranged at a constant pitch, and insulating films are adhered from both sides of the flat conductor. , Fixing the flat conductor with these insulating films, projecting the terminal portion to the outside from one end edge portion of the insulating film, and at least exposing the surface portion of the flat conductor on the other end edge side of one insulating film. The present invention is characterized by including a single flexible flat cable used as a contact portion, and integrally bonding two flexible flat cables alone on the back side of these contact portions via a reinforcing member.

In order to achieve the above-mentioned fourth object, according to the present invention, flat conductors having terminal portions formed at one end are arranged at a constant pitch, and insulating films are adhered from both sides of the flat conductors. , Fixing the flat conductor with these insulating films, projecting the terminal portion to the outside from one end edge portion of the insulating film, and at least exposing the surface portion of the flat conductor on the other end edge side of one insulating film. It is equipped with a single flexible flat cable as a contact part, and two flexible flat cables are fixed together on the back side of these contact parts through a reinforcing member, and the terminal part side of the flat conductor is press-fitted into the holder to form the terminal part. Are aligned.

In order to achieve the above-mentioned fifth object, the present invention arranges flat conductors having terminal portions at both ends at a constant pitch, and attaches insulating films from both sides of the flat conductors. The flat conductors are fixed by these insulating films, and the terminal portions are projected to the outside of both end edges of the insulating film.

[0014]

According to the structure of claim 1, when connecting the printed circuit boards, the terminal portion may be soldered to one printed circuit board and the contact portion may be connected to the connector mounted on the other printed circuit board. Not only becomes unnecessary, but also the socket and the direct mounting type connector are unnecessary, and the cost of the harness product becomes low.

According to the structure of claim 2, the contact portion is less likely to be deformed by the reinforcing member, so that the contact portion can be easily inserted and connected to the connector.

According to the structure of claim 3, when connecting the printed circuit boards, the terminal portion of one flexible flat cable is soldered to the first printed circuit board, and the terminal portion of the other flexible flat cable is connected to the second printed circuit board.
It is sufficient to solder to the printed circuit board and to connect the contact portion to the connector mounted on the third printed circuit board, which makes it possible to handle a harness that requires branching.

According to the structure of claim 4, when connecting the printed circuit boards, the terminals of the flexible flat cable alone are inserted into the through holes arranged in two rows of the connection pattern of one printed circuit board and then connected by soldering. Then, it suffices to connect the contact portion of the flexible flat cable alone to the flat cable connector mounted on the other printed circuit board, thereby enabling a multipolar connector.

According to the structure of claim 5, after inserting the terminal portion held by the holder into the through holes arranged in two rows of the connection pattern of the first printed circuit board, the terminals are connected by soldering to make the first flexible sheet. After inserting the terminal part of the flat cable unit into the through hole of the connection pattern of the second printed circuit board, it is connected by soldering, and the terminal part of the second flexible flat cable unit is connected to the connection pattern of the third printed circuit board. After inserting into the through hole, it suffices to connect them by soldering, which enables not only a multi-pole connector but also a connector.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view of a connection structure between printed circuit boards according to a flexible flat cable structure according to the present invention, FIG. 2A is a plan view of a flexible flat cable structure according to the present invention and a flat cable connector, FIG. (2) is a side view of the same flexible flat cable structure and flat cable connector, (3) of FIG. 2 is an enlarged view of (2) A portion, FIG. 3 is a vertical cross-sectional view of the flat cable connector, and FIG. FIG. 4 is a perspective view of a terminal portion of a flat conductor.

The flexible flat cable unit 1 of the present invention is provided with a flat conductor 2, and the flat conductor 2 is formed by flattening a wire material by rolling. And
A terminal portion 3 having a circular cross section is formed at one end of the flat conductor 2.

The flat conductors 2 are arranged at a constant pitch, and the insulating films 4 are formed on both sides of the flat conductor 2.
5, the flat conductor 2 is fixed with these insulating films 4 and 5, the terminal portion 3 is projected outward from one end edge portion of the insulating films 4 and 5, and the other end portion of the insulating film 4 is fixed. The flat conductor 2 is cut and peeled off to expose one surface portion of the flat conductor 2 to form the contact portion 6. Alternatively, the insulating films 4 and 5 having different lengths may be used to expose one surface portion of the flat conductor 2 to form the contact portion 6.

This flexible flat cable alone 1
A reinforcing member 7 is attached to the back side of the contact portion 6 by fixing means such as adhesion, and the reinforcing member 7 is fitted to the back side portion of the connector connecting portion 6 and both ends of the reinforcing portion 8. Locking piece 9 protruding outward from the
And have.

In order to connect the printed circuit boards using the flexible flat cable structure configured as described above, the terminal portion 3 at one end of the flexible flat cable unit 1 is connected to the through hole of the connection pattern 11 of the one printed circuit board 10. After being inserted in 12, the solder is connected to the connection pattern 11 of one printed circuit board 10 and the contact portion 6 at the other end of the flexible flat cable 1 is connected to the flat cable connector 14 mounted on the other printed circuit board 13. It is done by connecting.

That is, the flat cable connector 14 is mounted on the other printed circuit board 13. The flat cable connector 14 includes a housing 15, and the housing 15 includes a large number of contact terminals 16.
Is separated and housed by a partition wall 17, and
A flat cable insertion portion 19 is formed in the front opening 18 of the housing 15, and the contact portion 16a of the contact terminal 16 projects into the flat cable insertion portion 19, and the leg portion 16b of the contact terminal 16 is It is bent. The flat cable connector 14 is mounted on the printed circuit board 13 by soldering after inserting the leg portions 16b of the contact terminals 16 into the through holes 20 of the connection pattern (not shown) of the printed circuit board 13. There is.

The contact portion 6 of the flexible flat cable single body 1 is connected to the flat cable connector 14 by inserting the contact portion 6 of the flexible flat cable single body 1 together with the reinforcing portion 8 of the reinforcing member 7 into the flat cable. The lock portion 9 is inserted into the lock portion 15a of the housing 15 and the engaging groove 15b of the lock portion 15a
To contact the contact portion 16 a of the contact terminal 16 with the contact portion 6.

As described above, when connecting the printed circuit boards, the terminal portion 3 is soldered to one printed circuit board 10 and the contact portion 6 is connected to the flat cable connector 14 mounted on the other printed circuit board 13. Not only the pressure welding step is unnecessary, but also the socket and the board direct-attaching type plug are not necessary, so that a harness product that is easy to cost can be provided. Further, the contact portion 6 becomes difficult to be deformed by the reinforcing member 7,
This facilitates insertion and connection of the contact portion 6 to the flat cable connector 29.

Another embodiment of the present invention will be described with reference to FIGS. In this embodiment, two flexible flat cable single bodies 1 are used, and the back surface portions of the contact portions 6 of these two flexible flat cable single bodies 1 are bonded to the reinforcing portion 8 of the reinforcing member 7. The terminal portion 3 of the cable 1 is inserted into the through hole 24 of the connection pattern (not shown) of the first printed board 22 and then connected by soldering, and the terminal portion 3 of the other flexible flat cable 1 is After being inserted into the through hole 27 of the connection pattern (not shown) of the second printed board 25, they are connected by soldering.

A flat cable connector 29 is mounted on the third printed board 28. The flat cable connector 29 includes a housing 30, and a plurality of pairs of contact terminals 31 are housed in an opening 30a of the housing 30 separated by a partition wall (not shown). After the leg portions 31a are inserted into the through holes 33 of the connection pattern (not shown) of the third printed board 28, they are mounted by soldering.

The contact portion 6 of the flexible flat cable unit 1 is connected to the flat cable connector 29. In this case, the contact portion 6 of the flexible flat cable simple substance 1 is inserted into the opening 30a together with the reinforcing portion 8 of the reinforcing member 7, and the lock portion 9 is engaged with the engaging groove 32a of the lock portion 32 of the housing 30.
To contact the contact portion 31b of the contact terminal 31 with the contact portion 6 of the flexible flat cable 1.

As described above, when connecting the printed circuit boards, the terminal portion 3 of the single flexible flat cable 1 is soldered to the first printed circuit board 22 and the terminal portion 3 of the other flexible flat cable 1 is connected. It suffices to solder to the second printed circuit board 25 and connect the contact portion 6 to the flat cable connector 29 mounted on the third printed circuit board 28, which makes it possible to cope with a harness that requires branching. .

FIG. 7 shows another embodiment of the present invention.
In this embodiment, two flexible flat cable single bodies 1 are used, and the back surface portions of the contact portions 6 of these flexible flat cable single body 1 are bonded to the reinforcing portion 8 of the reinforcing member 7 to connect the terminal portions 3 of the flexible flat cable single body 1. The holder 34 is held and aligned.

Press-fitting holes 35 are formed in the holder 34 according to the number of the terminal portions 3 of the two flexible flat cables 1 and the press-fitting portions 36 on the side of the terminal portion 3 are formed in the press-fitting holes 35. It is press-fitted and these terminal parts 3
Are aligned. Locking claws 37 are formed at both ends of the holder 34.

When connecting the printed circuit boards using the flexible flat cable structure constructed as described above, the locking claws 37 of the holder 34 are connected to the locking holes of one printed circuit board (not shown). After engaging with (not shown) and inserting the terminal portion 3 of the flexible flat cable 1 into two rows of through holes (not shown) of the connection pattern (not shown) of one printed circuit board, Connection is made by soldering, and the contact portion 6 of the flexible flat cable simple substance 1 is connected to the flat cable connector 29 mounted on the other printed circuit board (not shown). In this case, the contact portion of the flexible flat cable unit 1 comes into contact with the contact terminal 31 of the flat cable connector 29 as in the case of the other embodiment of the present invention shown in FIGS.

As described above, when connecting the printed circuit boards, the terminal portions 3 of the flexible flat cable alone 1 are inserted into the through holes arranged in two rows of the connection pattern of one printed circuit board, and then connected by soldering. It suffices to connect the contact portion 6 of the flexible flat cable unit 1 to the flat cable connector 29 mounted on the other printed circuit board, which enables a multipolar connector.

8 to 11 show another embodiment of the present invention. In this embodiment, the flat conductor 2 having the terminal portions 3 at both ends is provided. This flat conductor 2 is obtained by punching a hoop material in a plurality of pressing steps, and finally, as shown in FIG.
As shown in FIG. 0, the terminal portions 3 at both ends are held by the carrier 38, and the terminal portions 3 are formed into a circular cross section by curling both side portions by pressing as shown in FIG. At the time of processing the flat conductor 2, a barb 40 is formed in the press-fitting portion 39 on the one terminal portion 3 side.

The flat conductors 2 are arranged at a constant pitch, and the insulating film 4 is formed on both sides of the flat conductor 2.
5 are bonded together, the flat conductor 2 is fixed by these insulating films 4 and 5, the terminal portion 3 is projected to the outside from both end edges of the insulating films 4 and 5, and the press-fitting portion 39 on the terminal portion side is held by the holder 41. These terminal portions 3 are aligned by being press-fitted into the press-fitting holes 42 of.

When connecting the printed circuit boards using the flexible flat cable structure configured as described above, the terminal portion 3 held by the holder 41 is first
After being inserted into two rows of through holes (not shown) of a connection pattern (not shown) of a printed circuit board (not shown), they are connected by soldering, After inserting the terminal portion 3 into the through hole (not shown) of the connection pattern (not shown) of the second printed board, the terminal portion 3 of the second flexible flat cable unit 1 is connected by soldering. Connection pattern (not shown) of third printed circuit board (not shown)
After it is inserted into the through hole (not shown), it is connected by soldering.

As described above, the terminal portion 3 held by the holder 41 is inserted into the through holes arranged in two rows of the connection pattern of the first printed circuit board and then connected by soldering to make the first flexible sheet. After inserting the terminal portion 3 of the flat cable single body 1 into the through hole of the connection pattern of the second printed circuit board and connecting by soldering, the terminal portion 3 of the second flexible flat cable single body is connected to the third printed circuit board. After inserting into the through hole of the connection pattern, it suffices to connect by soldering, and a multipolar connector becomes possible.

[0039]

As described above, according to the present invention of claim 1, flat conductors having terminal portions formed at one end are arranged at a constant pitch, and insulating films are attached from both surfaces of the flat conductors. , Fixing the flat conductor with these insulating films, projecting the terminal portion to the outside from one end edge portion of the insulating film, and at least exposing the surface portion of the flat conductor on the other end edge side of one insulating film. Since the contact parts are used, when connecting the printed circuit boards, it is sufficient to solder the terminal part to one printed circuit board and connect the contact part to the connector mounted on the other printed circuit board, and the pressure welding process is unnecessary. In addition, the socket and the plug directly attached to the substrate are unnecessary, and a costly harness item can be provided.

Further, according to the present invention of claim 2, flat conductors having terminal portions formed at one end are arranged at a constant pitch, and insulating films are adhered from both sides of the flat conductors. The flat conductor is fixed, the terminal portion is projected outward from one end edge of the insulating film, and at least the flat conductor surface portion on the other end edge side of one insulating film is exposed to form a contact portion. Since the reinforcing member is provided on the back side of the portion, the contact portion is less likely to be deformed by the reinforcing member, so that the contact portion can be easily inserted and connected to the connector.

Further, according to the present invention of claim 3, flat conductors having terminal portions formed at one end are arranged at a constant pitch, and insulating films are adhered from both sides of the flat conductors. A flexible flat that fixes the flat conductor, projects the terminal part from one end of the insulating film to the outside, and at least exposes the flat conductor surface part on the other end side of one insulating film as a contact part. Since a single cable is provided and two flexible flat cables are integrally fixed to each other via a reinforcing member on the back side of these contact portions, the flexible flat cable of one of Solder the terminal part to the first printed board, and connect the terminal part of the other flexible flat cable to the second printed board. The soldered may be connected to the contact portion in the connector mounted on the third printed board, it will be able to handle with respect to the harness which requires a branch.

Further, according to the present invention of claim 4, flat conductors having terminal portions formed at one end are arranged at a constant pitch, and insulating films are adhered from both sides of the flat conductors. A flexible flat that fixes the flat conductor, projects the terminal part from one end of the insulating film to the outside, and at least exposes the flat conductor surface part on the other end side of one insulating film as a contact part. Since a single cable is provided and two flexible flat cables are fixed on the back side of these contact parts via a reinforcing member, the flat conductor terminal portion is press-fitted into the holder to align the terminal portions. When connecting the printed circuit boards, the terminals of the flexible flat cable alone should be arranged in two rows of the connection pattern of one printed circuit board. After insertion into Horu, connected by soldering, the well by connecting the flexible flat cable single contact section in the connector for a flat cable mounted on the other printed circuit board, a multi-pole connector is possible.

Further, according to the present invention of claim 5, flat conductors having terminal portions formed on both ends thereof are arranged at a constant pitch, and insulating films are adhered from both sides of the flat conductors. Since the flat conductor is fixed and the terminal portion is projected outward from both end edges of the insulating film, the terminal portion held by the holder is inserted into two rows of through holes of the connection pattern of the first printed circuit board. Then, connect by soldering, insert the terminal part of the first flexible flat cable into the through hole of the connection pattern of the second printed circuit board, and then connect by soldering, the second flexible flat cable After inserting the single terminal part into the through hole of the connection pattern of the third printed circuit board, it may be connected by soldering, and a multi-pole connector is possible. Or, the connector is not required.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a connection structure between printed circuit boards according to a flexible flat cable structure according to the present invention.

FIG. 2A is a plan view of a flexible flat cable structure and a flat cable connector according to the present invention. (2) is a side view of the flexible flat cable structure and the flat cable connector.
(3) is an enlarged view of (2) A section.

FIG. 3 is a vertical cross-sectional view of a flat cable connector.

FIG. 4 is a perspective view of a terminal portion of a flat conductor.

FIG. 5 is an exploded perspective view of a connection structure between printed boards according to another flexible flat cable structure according to the present invention.

FIG. 6A is a plan view of another flexible flat cable structure and a flat cable connector according to the present invention. (2) is a side view of the flexible flat cable structure and the flat cable connector.
(3) is an enlarged view of (2) B part.

FIG. 7 (1) is a plan view of another flexible flat cable structure according to the present invention and a flat cable connector. (2) is a side view of the flexible flat cable structure and the flat cable connector.
(3) is an enlarged view of (2) C section.

FIG. 8 is a plan view of another flexible flat cable structure according to the present invention.

FIG. 9 is a cross-sectional view of the flexible flat cable structure.

FIG. 10 is a plan view of a flat conductor.

FIG. 11 is a perspective view of a terminal portion of the flat conductor.

FIG. 12 is an exploded perspective view of a connection structure between printed circuit boards according to a conventional flexible flat cable structure.

[Explanation of symbols]

 1 Flexible flat cable single unit 2 Flat conductor 3 Terminal part 4, 5 Insulation film 6 Contact part

Claims (5)

[Claims] 1. A flat conductor having a terminal portion formed at one end thereof is arranged at a constant pitch, an insulating film is attached from both sides of the flat conductor, and the flat conductor is fixed by these insulating films, and the terminal is provided. A flexible flat cable structure characterized in that a portion of the insulating film is projected outward from one edge of the insulating film, and at least the surface portion of the flat conductor on the other edge of one insulating film is exposed to form a contact portion. 2. A flat conductor having a terminal portion formed at one end thereof is arranged at a constant pitch, an insulating film is adhered from both sides of the flat conductor, and the flat conductor is fixed by these insulating films, and the terminal is provided. Part of the insulating film projecting from one edge of the insulating film, and at least the surface of the flat conductor on the other edge of one insulating film is exposed to form a contact part, and a reinforcing member is provided on the back side of this contact part. Flexible flat cable structure characterized by 3. A flat conductor having a terminal portion formed at one end thereof is arranged at a constant pitch, an insulating film is attached from both surfaces of the flat conductor, and the flat conductor is fixed by these insulating films, and the terminal is formed. A portion of the insulating film is projected outward from one end edge portion of the insulating film, and at least a flexible flat cable unit is provided which is a contact portion by exposing the surface portion of the flat conductor on the other end edge portion side of one insulating film,
A flexible flat cable structure characterized in that two flexible flat cables are united by fixing them on the back side of these contact portions via a reinforcing member. 4. A flat conductor having a terminal portion formed at one end thereof is arranged at a constant pitch, an insulating film is attached from both sides of the flat conductor, and the flat conductor is fixed with these insulating films, A portion of the insulating film is projected outward from one end edge portion of the insulating film, and at least a flexible flat cable unit is provided which is a contact portion by exposing the surface portion of the flat conductor on the other end edge portion side of one insulating film,
A flexible flat cable characterized in that two flexible flat cables alone are fixed on the back side of these contact portions via a reinforcing member, and the terminal portions of the flat conductors are pressed into a holder to align the terminal portions. Cable structure. 5. A flat conductor having terminal portions formed on both ends thereof is arranged at a constant pitch, insulating films are adhered from both sides of the flat conductor, and the flat conductors are fixed by these insulating films, and the terminal portion is formed. A flexible flat cable structure characterized in that the insulating film is protruded from both edges of the insulating film.