JP2005093140A - Connection method of multi-core insulated wire and connection part of flexible circuit board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection method of multi-core insulated wires and a connection part of a flexible circuit board, where the connection part is small in height, and which easy-to-mount/demount and furthermore applicable to any number of cores. <P>SOLUTION: The connecting method connects multi-core insulated wires with each other, where each multi-core insulated wire has a plurality of conductors, which are arranged in parallel at the same pitch at a specified spacing, and an insulation layer, which covers at least one of the multi-core insulated wires and is common to both multi-core insulated wires. The method comprises a step where conductive elements and insulating elements, which make up a fastener and have the same shape, are mounted respectively at the same pitch on end peripheries, to which the conductors of the multi-core insulated wires to be connected are exposed so that the conductive element is attached to the conductor, and at least one of the insulating elements for insulating each conductor is between adjacent conductors; and a step where the end peripheries are brought into correspondence with conductors to be connected, and are arranged, for a slider to engage the elements of multi-core insulated wires with each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a connection method of multi-core insulated wires and a connection portion of a flexible circuit board, and in particular, can be easily connected, can reduce the thickness of the connection portion, and can be applied regardless of the number of wire cores. The present invention relates to a connection method of a possible multi-core insulated wire and a connection portion of a flexible circuit board.

  In general, a flexible circuit board has a total thickness of 50 to about 50 to 70 microns bonded to a flexible electrically insulating plastic film such as a polyimide film about 12 to 100 microns thick. A conductor pattern formed by etching on a copper-clad insulating film having a thickness of about 300 microns, and is widely used for signal lines and power lines of various electric and electronic devices because of its small size and light weight.

  Usually, the flexible circuit board is used as a connection conductor by connecting to a terminal on the apparatus side or another flexible circuit board connected to the apparatus.

  By the way, when connecting a flexible circuit board to another flexible circuit board, the conductor at the end of the flexible circuit board to be connected is exposed and inserted into the connector, and the conductor exposed with a spring, clip or screw is connected to the connector. An electrical and mechanical connection is made by pressing and fixing to a connection terminal.

  However, in the connection portion of the flexible circuit board using such a connector, the terminal processing of the flexible circuit board and the mounting of the flexible circuit board on the connector are complicated, and the height of the connector is high, which hinders downsizing of the device. There was a problem.

  In addition, when the connecting portion of the flexible circuit board is frequently attached and detached, there is a problem that it takes a long time for the operation because the attaching and detaching operation is complicated.

  Furthermore, since conventional connectors are designed according to the number of wire cores, there is a problem in that corresponding connectors must be prepared according to the number of wire cores of the flexible circuit board.

  The present invention has been made in order to solve the conventional problems, and has a connection part with a low height, can be easily attached and detached, and can be applied regardless of the number of cores. It aims at providing the connection part of a flexible circuit board.

  The method for connecting multi-core insulated wires according to the present invention is a method for connecting multi-conductor insulated wires having a plurality of conductors arranged in parallel at the same pitch with a predetermined insulation interval and provided with a common insulating layer covering at least one side. The conductive elements of the same shape and the electrically insulating elements constituting the fasteners are respectively attached to the exposed edges of the conductors of the multi-core insulated wires to be connected, and the conductive elements are attached to the conductors. And at least one insulative element that electrically insulates each conductor between adjacent conductors, and a step of attaching them at the same pitch, and a set of multicores to be connected A step of aligning the end edges of the insulated wires in parallel with the conductors to be connected and engaging the elements of the multi-core insulated wires with a slider.

  Further, the connecting portion of the flexible circuit board of the present invention includes a conductive element and an electrically insulating element constituting a fastener on the edge where the conductor pattern of the plurality of flexible circuit boards to be connected is exposed. The conductive elements are attached to the conductor pattern, and are attached at the same pitch so that at least one of the insulating elements that electrically insulate each conductor is interposed between adjacent conductors. The end edges of the set of flexible circuit boards to be connected are arranged in parallel with corresponding conductor patterns to be connected, and the elements of the flexible circuit boards are engaged with sliders.

In the present invention, the size and arrangement of the conductive elements and the electrically insulating elements are arbitrarily set according to the conductor width and conductor spacing of the multi-core insulated wire to be connected and the flexible circuit board, for example, as follows. Can do.
1) The conductive element and the electrically insulating element are alternately attached one by one so that the electrically conductive element is disposed on the conductor and the electrically insulating element is disposed between the conductors.
2) Arrange so that multiple conductive elements are located on the conductor and one insulating element is located between the conductors, or one conductive element is located on the conductor, and between the conductors Are arranged so that a plurality of insulating elements are located in
3) A plurality of conductive elements are arranged on the conductor, and a plurality of insulating elements are arranged between the conductors.

  When the conductor width and the conductor interval are very large compared to the element width, it is possible to attach one conductive element and one electrically insulating element or several alternately. .

When a conductor that does not need to be connected is exposed at the edge, an insulating element may be attached on the conductor.
However, in any case, it is necessary that each element is attached at the same pitch as a whole.

  As is clear from the above embodiments, the connecting portion of the present invention is easy to attach and detach, and since no separate connector is used, the connecting portion can be miniaturized, and regardless of the number of wire cores. It is possible to apply.

  Embodiments of the present invention will be described below.

1-3 schematically show an example in which the present invention is applied to connection of a flexible circuit board.
As shown in the figure, the flexible circuit boards 1 and 2 have a conductive pattern 4 made of copper foil on one side of a plastic film 3 having good flexibility such as a polyimide resin film by a known pattern forming technique. A plurality of lines are formed in parallel at equal intervals.

  The circuit boards 1 and 2 are linearly formed with edges 1a and 2a to be connected so as to be substantially orthogonal to the conductor patterns 4.

  Fastener elements 5 having a width smaller than ½ of the width of the conductor pattern 4 are attached to these end edges 1a and 2a at equal intervals. These elements 5 are composed of a conductive element 5 a made of copper alloy or hard conductive plastic and an electrically insulating element 5 b made of hard plastic, and a plurality of conductive elements 5 a are formed on the conductor pattern 4. However, on the plastic film 3 between the conductor patterns 4, a plurality of electrically insulating elements 5b are respectively attached at equal intervals.

  Each element 5 is made of a plastic material by a method in which the edges of the flexible circuit boards 1 and 2 are sequentially sandwiched at equal intervals by a U-shaped element, as in the case of attaching an element in a normal fastener. In this case, it is formed on the edge of the flexible circuit boards 1 and 2 by a method such as injection molding using a mold.

  These elements 5 are engaged in such a manner that the end edges of the flexible circuit boards 1 and 2 are arranged in parallel so as to abut the conductor pattern 4 to be connected, and a normal fastener is engaged by a slider 6.

  In the flexible circuit boards 1 and 2 in which the elements 5 are engaged with each other in this way, the conductive patterns 4 to be connected are electrically connected by the conductive elements 5a and the adjacent conductors are electrically insulated. Insulated by the element 5b, each conductor pattern is independently connected to a corresponding conductor pattern.

  In FIG. 3, an insulating film 12 is formed on a surface of a tough woven fabric 11 as a reinforcing core by coating with insulating rubber or plastic with good flexibility, and the insulating film 12 is orthogonal to the length direction. In this embodiment, the auxiliary tape 14 having the conductor patterns 13 formed at equal intervals is used. The conductor pattern 13 may be formed of either copper foil or conductive paint.

  On one side edge of the auxiliary tape 14, a number of elements 15 consisting of conductive elements 15a and electrically insulating elements 15b are attached at equal intervals in the same manner as in FIG. A flexible circuit board 17 having a conductor pattern 16 of the same pitch as the conductor pattern 13 of the auxiliary tape 14 is connected by overlapping the conductor patterns 13 and 16.

The auxiliary tape 14 and the conductive patterns 13 and 16 of the flexible circuit board 17 are integrally bonded using an anisotropic conductive adhesive or the like in an electrically independent state.
Corresponding flexible circuit boards are connected in the same manner as in the first embodiment.

  The flexible circuit board connecting portion of this embodiment is suitable for a connecting portion of a flexible circuit board that is frequently attached and detached because the auxiliary tape 14 is excellent in flexibility and strong.

The above is an example in which the present invention is applied to the connection of a flexible circuit board, but the present invention is not limited to such an embodiment, and a plurality of conductors such as a flat cable often used for connecting devices are used. The present invention can be similarly applied to a multi-core insulated wire provided with a common insulation coating in parallel at the same pitch with a predetermined insulation interval.

1 is a perspective view schematically showing an embodiment of the present invention. Sectional drawing which shows typically the attachment part of the element of one Example of this invention. The perspective view which shows the slider used for one Example of this invention. Sectional drawing which shows typically the connection part of the other Example of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 2 ... Flexible circuit board Circuit board, 3 ... Plastic film, 4 ... Conductor pattern, 5 ... Element, 5a ... Conductive element, 5b ... Electrically insulating element, 11 ... Woven cloth, 12 ... Insulating film, 13 ... Conductor pattern, 14 ... Auxiliary tape, 15 ... Element, 15a ... Conductive element, 15b ... Electrical insulating element, 16 ... Conductor pattern

Claims (2)

In a method of connecting a plurality of conductors to each other with a plurality of conductors arranged in parallel at the same pitch with a predetermined insulation interval and provided with a common insulating layer covering at least one side,
The end of the exposed conductor of the multi-core insulated wire to be connected is attached with the same conductive element and the electrically insulating element constituting the fastener, and the conductive element is attached to the conductor; and Attaching at the same pitch such that at least one insulating element that electrically insulates each conductor is interposed between adjacent conductors;
The edge of each set of multi-core insulated wires to be connected is aligned in parallel with the conductor to be connected, and the elements of each multi-core insulated wire are engaged with a slider. To connect multi-core insulated wires.   A conductive element and an electrically insulating element constituting a fastener are attached to the exposed edges of a plurality of flexible circuit boards to be connected, and the conductive element is attached to the conductive pattern; and At least one insulating element that electrically insulates each conductor is interposed between adjacent conductors so that they are attached at the same pitch, and the ends of the set of flexible circuit boards to be connected A connecting portion of a flexible circuit board, wherein edges are arranged in parallel with corresponding conductor patterns to be connected, and elements of each flexible circuit board are engaged with a slider.

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