JPS6231764B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to adhesive connectors that are often used particularly in small electronic devices.

Conventionally, adhesive connectors used in small calculators and the like are made by applying conductive paint onto a film base 1 such as a polyester film by means such as screen printing, as shown in Figure 1. A wiring circuit 2 is formed using the same method, and a conductive adhesive layer 3 is formed on the wiring circuit 2 by the same method, and an insulating portion that does not require electrical connection is further insulated by the same method. Generally, a adhesive layer 4 is formed thereon. However, heat treatment is required to dry and harden the paint or adhesive applied to the film base, and as a countermeasure against heat shrinkage of the film base at this time, the film base must be heated in advance and applied after heat shrinkage. A preliminary tempering process is required. Further, since the coating operation is performed several times by screen printing or the like, alignment is troublesome and problems tend to occur in terms of accuracy.

Also, as shown in Fig. 2, there is a so-called flat cable that is made of a plurality of parallel metal wires 5 covered with a covering material 6 such as plastic, which is used for a similar purpose. It is used by connecting with a socket-type connector or by connecting it to a socket-type connector, and unlike adhesive connectors, it is not possible to easily perform installation and electrical connection at the same time, and it is not possible to easily perform installation and electrical connection at the same time as with adhesive connectors, It could not be used for electronic parts that cannot be attached.

This invention was made in view of these problems, and eliminates the need for a preliminary heat treatment process for the film base, eliminates the need for troublesome positioning, improves positional accuracy, and further improves mass productivity. Adhesive connectors can be used for both solderable and non-solderable electronic components. is intended to provide.

Next, an embodiment of the present invention will be described with reference to the drawings from FIG. 3 onwards. In the figure, 7 is an adhesive formed by coating the periphery of a core wire 8, which is conductive like a metal wire and can be soldered, with a conductive adhesive 9 by a method such as extrusion molding. The conducting wire 10 is an adhesive linear insulator formed by covering the periphery of a non-conductive core wire 11 such as synthetic fiber with an insulating adhesive 12 by a method such as extrusion molding. In the embodiments shown in FIGS. 3 and 4, these adhesive conductive wires 7 and adhesive linear insulators 10 are arranged alternately in parallel, and are fused and integrated. One end of the conducting wire 7 has a core wire 8 exposed to form an exposed core wire portion 8a. In this example, a non-conductive core wire 11 of the adhesive linear insulator 10 is used, but there is a risk that the core wire 11 may be exposed from the coating of the insulating adhesive 12 and come into contact with live parts. If there is no core wire, the manufacturing process can be simplified by using a wire having the same conductivity as the core wire 8 as the core wire 11.

FIG. 5 shows an example of the state of use, where 13 is an adhesive connector configured as described above, 14 is an electronic component such as a liquid crystal display element, 15 is a printed wiring board, and the adhesive connector 13 is an adhesive conductor. 7 and the adhesive linear insulator 10, the electronic component 14 and the printed wiring board 15 are adhered to each other,
The terminals of the electronic component 14 and the wiring portions of the printed wiring board 15 are electrically connected by adhesive conductive wires 7. Here, the terminal of the electronic component 14 and the adhesive conductor 7
are joined by the adhesive force of the conductive adhesive 9, and on the printed wiring board 15 side, the exposed core wire portion 8a is connected to the wiring portion by soldering. That is,
If the terminal part of the adherend, such as an electronic component, is made of a material that can be soldered, electrical connections are made by soldering as well as adhesion, and only the adhesive strength of the conductive adhesive is used. It is possible to further improve the reliability of the connection section compared to the case where the connection is made by a method. Further, since the soldered portion between the terminal portion on the printed wiring board side and the exposed core wire portion 8a is electrically connected with an extremely low resistance value, voltage drop due to the connector can be suppressed to a low level. Therefore, the electronic component 14 can be stably driven with an appropriate voltage.

As described above, since the adhesive connector 13 adheres by its own adhesive force, it is necessary to select an appropriate adhesive depending on the place where it will be used, that is, the material of the adherend. . Therefore,
For example, silicone-based adhesives are used as adhesives that have good adhesion to both glass and plastic, such as liquid crystal display elements, and polyester-based adhesives have particularly good adhesion to plastics. In addition, chloroprene rubber and nitrile rubber are used as adhesives that have poor adhesion to plastic but excellent adhesion to glass. In addition, when imparting conductivity to these adhesives, for example, those in which carbon particles are mixed and dispersed are used.

FIG. 6 shows a structure in which exposed core wire portions 8a are formed at both ends, and is used when electronic components at both ends can be soldered.

As described above, the present invention covers the periphery of a conductive and solderable core wire with a conductive adhesive to form an adhesive conductor wire, and alternately coats the adhesive conductor wire with an insulator. In addition to being arranged and integrated, the core wire is exposed at the end of the adhesive conductor wire, making it easy to manufacture adhesive connectors with high precision, allowing the number of terminals to be changed freely, and making it easier to use than extrusion molding. It can be produced continuously at high speed using a method that reduces costs, and it is also easy to store and use because it can be produced in continuous rolls and cut to the required length. There are effects such as Furthermore, since you can arbitrarily select between adhesive connection and soldering connection depending on the application, for example, you can connect the liquid crystal display element by adhesive (thermo-compression bonding), and then connect it to the printed wiring board in a later process. Depending on the situation, it is possible to freely select either adhesion or soldering, or both, and if the tip of the exposed core wire is bent, a hole in the printed wiring board corresponding to that position can be formed. In addition to being able to be used as a positioning means by inserting it into
Depending on the diameter of the core wire, it is possible to obtain an adhesive connector for large currents.

[Brief explanation of the drawing]

1 and 2 are sectional views of a conventional connector, FIG. 3 is a sectional view of an embodiment of the adhesive connector of the present invention, FIG. 4 is a perspective view of the same, and FIG. 5 is a sectional view of the same in use. A perspective view showing one example, and FIG. 6 is a perspective view of another embodiment. 7, 7a... Adhesive conducting wire, 8... Core wire, 8a... Exposed core wire portion, 9... Conductive adhesive, 10... Adhesive linear insulator, 11... Core wire, 12... Insulating adhesive, 13...
Adhesive connector.

Claims (1)

[Claims] 1. An adhesive conductor is formed by coating the periphery of a conductive and solderable core wire with a conductive adhesive, and the adhesive conductor and an insulator are arranged alternately. An adhesive connector characterized in that the adhesive conductor wire is integrated with the conductive wire and the core wire is exposed at the end of the adhesive conductor wire. 2. The adhesive connector according to claim 1, wherein the insulator is composed of a core wire and an insulating adhesive covering the core wire.