JPH06132057A - Structure for connection between flexible printed wiring board and circuit board - Google Patents

Abstract

PURPOSE:To provide a structure of connection in which a connector having a small width can be used even when the number of conductors is increased, and the occurrence of dead space on a circuit board can be prevented and at the same time a connector can be connected with a circuit board having a smaller width. CONSTITUTION:This structure of connection includes a circuit board 10, a flexible printed wiring board (FPC) 1 in which a plurality of conductors 3 are formed in parallel with one another and the one side of each conductor 3 is exposed to constitute a terminal part 3a and a connector 6 having contacts to abut against the terminal part 3a of each conductor in which the flexible printed wiring board (FPC) 1 is electrically connected with a circuit board 10 through the connector 6. In the terminal part 1a of the flexible printed wiring board (FPC), a notch 5 is formed between two conductors adjacent to each other at least in the central part, and contacts are arranged in opposite to each other, and the terminal part la of the flexible printed wiring board (FPC) is bent with the notch 5 used as the curve for bending in such a manner that the whole of the exposed surface of the terminal part 3a is located in the outside, and each terminal part 3a is abutted against the contacts in the state of bending.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible printed wiring board (hereinafter referred to as FPC) in which a plurality of conductors are formed in parallel.
Say. ) And a circuit board.

[0002]

2. Description of the Related Art Conventionally, when electrically connecting the above FPC to a circuit board, as shown in FIGS.
One end of each conductor 101 is exposed at the end 100a of the C100 to form the terminal portion 101a, and the connector 102 is connected to the circuit board 103 in advance.
The contact “a” is brought into contact with the contact 104 of the connector 102.

[0003]

However, according to the above-mentioned conventional technique, as the number of conductors is increased, the width of the FPC 100 becomes longer, and the width of the connector 102 must be correspondingly increased. Therefore, there may be a case where the connector 102 has to be obliquely connected to the circuit board 103 as shown in FIG. In this way, the connector 10
If 2 is connected diagonally, a dead space (hatched portion in FIG. 6) is generated, which is not preferable. Further, for the circuit board 103 having a small width, the width of the connector 102 may be too long to connect.

In view of the above problems, the present invention can use a connector with a narrow width even if the number of conductors is increased, which prevents the occurrence of a dead space on the circuit board and also provides a connector for a narrow circuit board. An object of the present invention is to provide a connection structure between a flexible printed wiring board and a circuit board that enables connection.

[0005]

In order to solve the above problems, a flexible printed wiring board and a circuit board according to the present invention have a connection structure in which a circuit board and a plurality of conductors are formed in parallel and end portions are formed. In which one surface of each conductor is exposed to form a terminal portion and a flexible printed wiring board, and a connector having a contact abutting the terminal portion of each conductor, the flexible printed wiring board through the connector. In a connection structure between a flexible printed wiring board and a circuit board, which is electrically connected to the circuit board, in the end portion of the flexible printed wiring board, at least two conductors adjacent to each other located in the central portion of the flexible printed wiring board are connected. A notch is formed therebetween, and the contacts of the connector are arranged to face each other,
Bending the end of the flexible printed wiring board such that the cutout is a bending curve so that all of the exposed surfaces of the terminals are located outside, and in the bent state, the terminals are connected to the contacts of the connector. It is characterized in that they are brought into contact with each other.

[0006]

According to the present invention, the end portion of the flexible printed wiring board is bent with the notch in the center portion as a bending curve, and in this bent state, the terminal portion is brought into contact with the contact of the connector. Therefore, the width of the end portion of the flexible printed wiring board in the connected state can be set to half the conventional width. Therefore, even if the number of conductors is increased and the width of the flexible printed wiring board is lengthened, a connector with a sufficiently short width can be used. Therefore, it is possible to prevent the occurrence of dead space on the circuit board and to reduce the width. The connector can be connected to a narrow circuit board.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1, 2 and 3.

The flexible printed wiring board (FPC) 1 according to the present embodiment is, as shown in FIGS. 1, 2 and 3,
A plurality of conductors 3 are formed in parallel on a base film 2 made of polyimide, polyester or the like, and these conductors 3 are coated with resin or covered with an overlay film 4 such as an insulating film. However, at the end portion 1a of the FPC 1, the conductor film 3 is not covered with the overlay film 4 so as to form the terminal portion 3a, and one surface of the conductor 3 is exposed.

Further, at the end 1a of the FPC 1,
Two conductors 3b adjacent to each other located in the central portion,
A cutout 5 is formed in the insulating portion 1b sandwiched by 3c.

The FPC 1 configured as described above is shown in FIG.
Also, as shown in FIG. 3, the notch 5 is formed into a bent curve and the terminal portion 3
The end portion 1a is bent so that the exposed conductor surface of a is entirely outside, and in this bent state, the end portion 1a is brought into contact (press contact) with the contact 7 of the connector 6.

As shown in FIG. 3, the connector 6 comprises a housing 8, contacts 7 and a slider 9. The contacts 7 are in two rows, and the housing 7 is arranged so that the contacts 7 in one row and the contacts 7 in another row face each other.
It is arranged inside. Then, the terminal portion 3a in the bent state as described above is inserted between the contact 7 in one row and the contact 7 in the other row, and the conductor exposed surface of the terminal portion 3a corresponds to each contact 7. The tip portion 7a is brought into contact (press contact) with each other so that an electrical connection is made. As shown in FIG. 3, the end portion 7b of the contact 7 extends to the outside of the housing 8, and the end portion 7b is soldered or the like to the circuit board 10, whereby the housing 8 is fixed to the circuit board 10. The slider 9 is to be inserted into the housing 8 after connecting the terminal portion 3a to the connector 6 as described above, and to enhance the contact state (pressure contact state) between each conductor exposed surface and each contact tip portion 7a. Is.

Next, a method for realizing the connection structure between the FPC 1 and the circuit board 10 according to this embodiment by using the FPC 1, the connector 6 and the circuit board 10 will be described.

First, the contact end portion 7b of the connector 6
Is fixed to the circuit board 10 by soldering or the like, whereby the connector 6 is electrically connected and fixed to the circuit board 10.

Next, in the FPC 1, the end 1a is bent so that the conductor exposed surface of the terminal portion 3a is located on the outer side with the notch 5 as a bending curve, and further, an adhesive tape or the like is used as necessary. After ensuring the bent state by inserting the terminal portion 3a between the two rows of contacts 7 of the connector 6 from above in the figure, each conductor exposed surface is brought into contact (press contact) with each contact tip portion 7a. As a result, the FPC 1 is electrically connected to and fixed to the connector 6.

Next, the slider 9 is inserted into the housing 8 of the connector 6, and each conductor exposed surface and each contact tip portion 7 are inserted.
The contact state (pressure contact state) with a is ensured.

In this way, the connection structure according to this embodiment is realized.

As described above, according to this embodiment,
The end portion 1a of the FPC 1 is bent with the notch 5 in the center portion as a bending curve, and in this bent state, the terminal portion 3a is brought into contact with the contact 7 of the connector 6. Therefore, the width of the end portion 1a of the FPC 1 in the connected state can be set to half the width of the conventional one. Therefore, even if the number of conductors is increased and the width of the FPC 1 is increased, the connector 6 having a sufficiently short width can be used. Therefore, it is possible to prevent the occurrence of dead space on the circuit board 10 and reduce the width. It becomes possible to connect the connector 6 to a different circuit board 10.

The present invention is not limited to the one in which the notch 5 is provided only in the central portion of the end portion 1a of the FPC 1 as in the above-described embodiment. A new notch 5 may be provided at an intermediate position between the portion and the end of the FPC 1 in the width direction, and the connector 6 may be configured accordingly.
The width of 1 is half that in the above-mentioned embodiment, and a further effect can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a connection structure between a flexible printed wiring board and a circuit board according to an embodiment.

FIG. 2 is a perspective view of the flexible printed wiring board.

FIG. 3 is an enlarged sectional view showing the same connection structure.

FIG. 4 is a perspective view showing a conventional connection structure.

FIG. 5 is an enlarged sectional view showing the same connection structure.

FIG. 6 is a perspective view for explaining problems of the conventional connection structure.

[Explanation of symbols]

 1 flexible printed wiring board 3 conductor 3a conductor terminal 5 notch 6 connector 7 contact 10 circuit board

Claims (1)

[Claims] 1. A circuit board, a flexible printed wiring board having a plurality of conductors formed in parallel and having one end of each conductor exposed at an end to form a terminal portion, and the terminal portion of each conductor. A connector having a contact in contact with the flexible printed wiring board, wherein the flexible printed wiring board is electrically connected to the circuit board via the connector. At the end of the plate,
A notch is formed between at least two conductors adjacent to each other located at the center thereof, and the contacts of the connector are arranged to face each other, and the end of the flexible printed wiring board is A flexible print characterized in that the cutout is bent so that all of the exposed surface of the terminal portion is located outside, and each terminal portion is brought into contact with the contact of the connector in the bent state. Connection structure between wiring board and circuit board.