JPH0537434Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an electronic circuit connecting cable that has a cable body and a connector for connecting electronic circuits.

(Prior Art) Conventionally, there has been a technology in this field as shown in FIG. The configuration will be explained below using figures.

FIG. 2 is a perspective view showing an example of the configuration of a conventional electronic circuit connection cable.

This electronic circuit connection cable 1 is used as an emulation cable for connecting an emulator and a user system in order to verify the operation of a user system using a microprocessor, digital signal processor, etc., for example. It is.

The electronic circuit connection cable 1 includes a cable main body 2, a user system connector 3 and an emulator connector 4 connected to both ends of the cable main body 2.

The cable body 2 includes a multicore parallel wire 2-1 in which a plurality of thin copper wires are arranged in parallel, and a vinyl covering 2-2 that covers these individually and connects them in a plate shape.
It is made up of. This vinyl coating 2-2
are separated into individual copper wires near both ends of the cable body 2 to facilitate connection with the connectors 3 and 4.

The user system connector 3 is for connecting to a user system, and has a package 3-1 and a plurality of conductor pins 3-2 protruding from the package 3-1. Each conductor pin 3-2 is connected to each copper wire of the multicore parallel wire 2-1 inside the package 3-1. These conductor pins 3-2 have the same cross-sectional shape and arrangement as the conductor pins of a pin grid array (hereinafter referred to as PGA) package such as a microprocessor mounted on the user system.

The PGA type package is used in recent LSI (Large
This corresponds to the increase in the number of external lead-out terminals associated with higher integration and multi-functionality in scale integration, and its use in microprocessors and the like is increasing.

The emulator connector 4 is connected to an emulator and has a package 4-1 and a plurality of female terminals 4-2, for example. These female terminals 4-2 are connected to each copper wire of the multicore parallel wire 2-1 within the package 4-1.

In order to verify the operation of the user system, for example to debug a program, using the electronic circuit connection cable 1 configured as described above, it is necessary to
Remove the PGA type package and insert the user system connector 3 of the electronic circuit connection cable 1 connected to the emulator in its place.

(Problems to be Solved by the Invention) However, the electronic circuit connection cable 1 having the above configuration has the following problems.

(1) Connect the cable body 2 to the user system connector 3, which has conductor pins 3-2 of the same shape and arrangement as the user system's PGA package.
When connecting the conductor pins 3-2, due to reasons such as the narrow installation spacing of the conductor pins 3-2, the multi-core parallel wires 2-2
It is extremely difficult to connect one individual copper wire all at once by pressure welding. Therefore, each conductor pin 3-
In contrast to No. 2, the copper wires must be connected one by one by soldering or the like, and the connection work is difficult and requires a large number of man-hours.

(2) Since the copper wire is connected to the thin conductor pin 3-2 using a small amount of solder, the connection strength is not sufficient. Therefore, the connection part is likely to be disconnected due to mechanical external force, resulting in reliability problems.

(3) The plate-shaped cable body 2 consisting of the multi-core parallel wire 2-1 and the vinyl sheath 2-2 does not have sufficient flexibility, and therefore stress is concentrated at the connection part of the conductor pin 3-2 at the end. This facilitates the occurrence of the wire breakage.

(4) When the electronic circuit connection cable 1 is used to connect, for example, a user system and an emulator, electronic components such as a chip resistor and a chip capacitor are required due to the electrical characteristics. However, since the electronic circuit connection cable 1 is not equipped with these electronic components, these must be separately prepared and connected, or must be incorporated into the user system, emulator, etc. in advance. Therefore, there are problems in that connection requires time and effort, and the design and production of user systems, emulators, etc. become complicated due to the increase in the number of electronic components.

The present invention addresses the problems that the conventional technology had, in that it is difficult and requires a large amount of man-hours to connect multi-core parallel wires and conductor pins, and the reliability of the connection part against external mechanical forces is insufficient. The present invention provides an electronic circuit connecting cable that solves the problems of the present invention and the need to separately prepare electronic components when using the electronic circuit connecting cable 1.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides an electronic circuit connecting cable with a flexible printed cable in which a wiring pattern is formed on an insulating film, and a flexible printed cable with a wiring pattern formed on an insulating film. an electronic component connected to the wiring pattern at an end of the flexible printed cable, a plurality of connection holes formed around the electronic component in the flexible printed cable and passing through the flexible printed cable, and the film at the peripheral edge of the connection hole. an insulating connector board having a connection pattern formed thereon and connected to the wiring pattern, and an opening in the center for accommodating the electronic component; and a connector in which a plurality of conductor pins protruding around the periphery pass through the connection hole and are connected to the connection pattern.

(Function) According to the present invention, since the electronic circuit connection cable is configured as described above, the flexible printed cable and the plurality of connection holes formed therein allow the conductor pin to be connected to the connection hole when connected to the conductor pin. By inserting it, it serves to restrain the flexible printed cable in a predetermined position and eliminates the need to match each connection hole with a conductor pin. This allows the flexible printed cable and the conductor pin to be easily and reliably connected, increases the mechanical strength of the connection, and allows external forces to be applied evenly. In addition, the opening of the connector board accommodates the electronic components connected to the wiring pattern, and at the same time, this electronic component eliminates the need to separately provide other electronic components when connecting electronic circuits using an electronic circuit connection cable. It has the function of Therefore, the above problem can be eliminated.

(Example) Fig. 1 is a perspective view of an electronic circuit connection cable showing an embodiment of the present invention, Fig. 3 is an exploded side view of Fig. 1,
and FIG. 4 is a bottom view of the connector of FIG. 3.

The electronic circuit connection cable 11 in FIG. 1 is used as an emulation cable for connecting a user system equipped with, for example, a microprocessor or a digital signal processor, to an emulator in order to verify its operation.

This electronic circuit connection cable 11 includes a cable main body 12, connectors 13 connected to both ends thereof,
14. The connector 13 is connected to the place where the microprocessor, etc. of the user system is removed during emulation, and includes a connector board 15 made of an insulating material and a plurality of metal etc. protruding through the connector board 15. It has a conductor pin 16. The conductor pins 16 have the same cross-sectional shape and arrangement as the conductor pins of a PGA type package such as a microprocessor to be removed, so as to facilitate connection with a user system.

The connector 14 is connected to the emulator and has a shape that matches the cable connection provided on the emulator. Therefore, if the emulator has a connection similar to the receiving part of the user system's PGA type package, the connector 14
has the same shape as the connector 13.

The cable main body 12 is, for example, two flexible printed cables (hereinafter referred to as FPC).
17-1 and 17-2. These FPCs 17-1 and 17-2 have wiring patterns formed on insulating films 18-1 and 18-2, and further covered with an insulating protective film. The wiring pattern can be obtained by, for example, forming conductive foil such as copper foil on the films 18-1 and 18-2 and etching the conductive foil.

As shown in FIG. 3, connectors 13,
A plurality of penetrating connection holes 19-1 and 19-2 are formed corresponding to the fourteen conductor pins 16. By passing the conductor pins 16 through these connection holes 19-1, 19-2, the two FPCs 17-1,
17-2 is stacked and fixed on the connector board 15.

The FPC 17-1 connected to the connector 13 has
For example, a small electronic component 20 such as a chip resistor or a chip capacitor is provided. This electronic component 2
0 is connected to the wiring pattern and FPC17
-1 and is provided to protrude below. Connector board 1 of connector 13 corresponds to electronic component 20
5 has an opening 15-1 passing through it.
is formed. This opening 15-1 utilizes an empty space formed in the center of the connector board 15 because the conductor pins 16 are arranged to match the PGA package.
When connecting FPC17-1 to connector 13,
The electronic component 20 is inserted into the opening 15- as shown in FIG.
1, but the dimensions and number of electronic components 20 are determined by the opening dimensions T1 and T2 of the opening 15-1.
and depth T3.

In the electronic circuit connection cable 11 configured as described above, for example, the connector 13 and the FPC 17
-1 and 17-2 are connected as follows.

First, the corresponding conductor pins 16 are inserted into the connection holes 19-1 of the FPC 17-1, and
The electronic component 20 provided on the FPC 17-1 is inserted into the opening 15-1. Next, the conductor pin 16
and connection hole 19-1. Connection hole 19-
A connection pattern of copper foil or the like connected to a wiring pattern is formed on the peripheral edge of the conductor 1 if necessary, so this connection pattern and the conductor pin 16 are connected by soldering or the like. Next, stack FPC 17-2 on top of FPC 17-1 connected to conductor pin 16,
Connection with conductor pin 16 is made in the same manner. The connector 14 and the FPCs 17-1 and 17-2 are connected in the same manner.

The present embodiment described above has the following advantages.

(a) When connecting connectors 13 and 14 having conductor pins 16 with the same cross-sectional shape and arrangement as the PGA type package of the user system and FPCs 17-1 and 17-2, connection holes 19-1 and 19-
2, the conductor pins 16 are inserted all at once.
FPC17-1, 17-2 is connector 13,1
4, and there is no need to check each conductor pin 16 and connection holes 19-1, 19-2 one by one. Therefore, in addition to making the connection work easier, the connection between the conductor pin 16 and the connection holes 19-1, 19-2
There is no risk of making a mistake when connecting the

(b) When connecting the cable body 12 and the connectors 13 and 14, the cable body 12 connects multiple FPCs 1
Since it is divided into FPCs 7-1 and 17-2, the arrangement of connection patterns to be soldered to the conductor pins 16 can be distributed among the FPCs 17-1 and 17-2. Also, FPC17-1, 17
-2 are insulated from each other. Therefore, individual
Since it is possible to avoid soldering the conductor pins 16 adjacent to each other in FPCs 17-1 and 17-2, there is no fear of short circuits, and the FPC
There is no fear of short circuit between 17-1 and 17-2.
Therefore, the connection work becomes easy and reliable.

(c) The conductor pins 16 are inserted into the connection holes 19-1 and 19-2 for each FPC 17-1 and 17-2. Therefore, with an increase in mechanical connection strength,
Since the external force is evenly distributed, there is no risk of disconnection of the connection. Also, FPC17-1, 17-2
has sufficient flexibility, stress concentration on the connection portion is also alleviated.

(d) Since the electronic component is connected to the FPC 17-1 and accommodated in the opening 15-1 of the connector board 15, there is no need to separately connect the electronic component 20 when connecting the user system and the emulator. Furthermore, since it is not necessary to equip the user system and the emulator with the electronic components 20 in advance, the number of electronic components 20 in the device can be reduced, and the design and production of both devices can be facilitated.

Note that the present invention is not limited to the illustrated embodiment;
Various modifications are possible, including the following modifications.

In this embodiment, the cable main body 12 has two
Although it is assumed that the FPCs 17-1 and 17-2 are included in the book, the present invention is not limited thereto. The number can be increased or decreased as appropriate depending on circuit conditions.

The wiring pattern is an insulating film 18-
It may be formed on both sides of 1 and 18-2.

The connectors 13, 14 and the conductor pins 16 do not necessarily have to have the same shape and the same wiring as the PGA type package. In short, the connector 13,
Any shape or arrangement may be used as long as it is compatible with the connection part on the device side to which 14 is connected.

The connectors 13 and 14 may have different shapes depending on the connection part on the device side to which they are connected, or one of them may be directly soldered to the electronic circuit on the device side.

In this embodiment, the electronic component 20 is an FPC
Although it is provided only on the connector 13 side of FPC 17-1, it is not limited to this, and for example, FPC 17-1.
It may be provided at both ends of 1 and 17-2. Also,
The number of electronic components 20 provided in each may be plural or one.

The electronic component 20 can also be provided in advance in the opening 15-1 of the connectors 13, 14 and connected to the conductor pin 16.

(Effects of the invention) As explained in detail above, according to the invention, the electronic circuit connection cable is composed of a flexible printed cable having a connection hole and a connector having a conductor pin passing through the connection hole. The printed cable and the conductor pin can be connected easily and reliably, and by increasing the strength of the connection and avoiding stress concentration, disconnection can be prevented. Additionally, since electronic components are incorporated into the electronic circuit connection cable, there is no need for separate electronic components when connecting devices, making it possible to reduce the number of electronic components within the device and simplify device design and production. .

Therefore, it is possible to easily manufacture the electronic circuit connecting cable, reduce the number of manufacturing steps, and improve its reliability. Furthermore, it is also possible to expect the effect of simplifying the devices connected by the electronic circuit connection cable.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an electronic circuit connecting cable showing an embodiment of the present invention, Fig. 2 is a perspective view showing one configuration example of a conventional electronic circuit connecting cable, Fig. 3 is an exploded side view of Fig. 1, and Fig. 4 is a bottom view of the connector of Fig. 3. 11: electronic circuit connecting cable, 12: cable body, 13, 14: connector, 15: connector board, 15-1: opening, 16: conductor pin, 17-1, 17-2: flexible print cable, 18-1, 18-2: film, 19-1, 19-2: connection hole, 20: electronic component.

Claims (1)

[Claims for Utility Model Registration] A flexible printed cable having a wiring pattern formed on an insulating film; an electronic component connected to the wiring pattern at an end of the flexible printed cable; a plurality of connection holes formed around the electronic component and passing through the flexible printed cable; a connection pattern formed on the film at the periphery of the connection hole and connected to the wiring pattern; and a connection pattern formed around the electronic component and connected to the wiring pattern; An insulating connector board is formed with an opening for accommodating a component, and a plurality of conductor pins protrude around the opening and pass through the connector board. An electronic circuit connection cable characterized by comprising a connector connected to a connection pattern.