JP2002374615A - Terminal of multi-core cable of round conductors - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal section of a multi-core cable of round conductors, which is connectable to an FPC connector by direct insertion, with out having to change the FPC connector previously fitted on an electronic apparatus side, and which has superior ease of wiring and bendability. SOLUTION: In the terminal section 1 of the round conductor multi-core cable, which is formed by parallel arranging a plurality of insulated cables 4a, 4b and so on formed by shielding round conductors 2a, 2b and so on with insulators 3a, 3b and so on, the insulators 3a, 3b and so on, on both ends of each of the insulated cables 4a, 4b and so on are removed to expose the round conductors 2a, 2b and so on, and the exposed round conductors 2a, 2b and so on are changed into flat conductors 6a, 6b and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal portion of a round conductor multi-core cable in which a plurality of insulated cables each formed by covering a round conductor with an insulator are arranged in parallel. FPC (Flexible Printed Circ) used around displays and displays of ultrasonic diagnostic equipment
It relates to the terminal of a round conductor multi-core cable that enables direct connection to a connector for a uit board (flexible printed circuit board).

[0002]

2. Description of the Related Art LCDs used in notebook computers, etc.
An electronic device such as a liquid crystal display (Liquid Crystal Display) is equipped with an FPC connector for connecting a cable to the electronic device. FPC connector has FPC
And a plurality of contacts that are provided along the insertion groove and electrically connect the LCD and the FPC inserted into the insertion groove of the connector.

The FPC connector is disclosed in Japanese Patent Application Laid-Open No. 2000-2000.
No. 100505, JP-A-7-106028,
This is disclosed in Japanese Utility Model Laid-Open No. 5-73885.

[0004] In addition to the FPC, a cable adapted to the FPC connector includes an FFC (Flex) in which a plurality of rectangular conductors are aligned with the contact pitch of the FPC connector and laminated with a film with an adhesive (polyester, polyimide or the like).
ible Flat Cable). In the case of the FFC, similarly to the FPC, the FFC is inserted into the FPC connector to enable electrical connection.

[0005] A two-layer FPC including a signal layer and a GND layer is also inserted into an FPC connector with GND to enable electrical connection.

In recent years, with the miniaturization of notebook personal computers and portable personal computers, the above-mentioned FPCs and FFCs having a rectangular conductor have limitations on wiring space and 360 ° flexibility, and a plurality of ultrafine conductors having a round conductor are required. Cables and micro coaxial cables are being used.

[0007]

However, when a cable having a round conductor is used, a crimping connector, a crimping connector, a soldering connector, and the like must be used. When a connector is already mounted, there is a problem that a cable having a round conductor cannot be used without changing from the FPC connector to another connector.

In addition, using the FPC connector as it is,
When a cable having a round conductor is used, the relay FP
C, etc., must be soldered once to the relay FPC and used, so that there is a problem in that the initial cost of manufacturing the relay FPC is generated, which increases the cost. .

Therefore, an object of the present invention is to provide an FP without changing an FPC connector already mounted on an electronic device.
An object of the present invention is to provide a terminal portion of a round conductor multi-core cable which can be directly inserted into a C connector and connected, and has excellent wiring and flexibility.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and the invention of claim 1 is as follows.
At the end of a round conductor multi-core cable in which a plurality of insulated cables composed of round conductors covered with an insulator are removed, the insulator at both ends of each insulated cable is removed to expose the round conductor. This is a terminal portion of a round conductor multicore cable in which the exposed round conductor is transformed into a flat conductor.

According to a second aspect of the present invention, the round conductor is exposed by removing insulators at both ends of each insulated cable, the exposed round conductor is deformed into a flat conductor, and adhered to the lower surface of the flat conductor. 2. The end portion of the round conductor multi-core cable according to claim 1, wherein a film with an adhesive is attached and fixed, and a reinforcing plate with an adhesive is provided on a lower surface of the film with an adhesive and reinforced.

According to a third aspect of the present invention, in a terminal portion of a round conductor multi-core cable in which a plurality of insulated cables each formed by covering a round single-wire conductor with an insulator are arranged at both ends of each insulated cable. Remove the insulator to expose the round conductor,
This is a terminal portion of a round conductor multicore cable in which a film with an adhesive is adhered and fixed to the lower surface of the exposed round conductor, and a reinforcing plate with an adhesive is provided on the lower surface of the film with the adhesive and reinforced.

According to a fourth aspect of the present invention, there is provided a coaxial cable comprising an inner conductor covered with an inner insulator, an outer conductor provided on an outer periphery of the inner insulator, and the outer conductor covered with the outer insulator.
At the ends of the coaxial cables arranged in parallel, the outer insulator and the inner insulator at both ends of each coaxial cable are removed to expose the outer conductor and the inner conductor, and the exposed inner conductor is transformed into a flat conductor. A coaxial cable in which a reinforcing plate with an adhesive having a conductive layer for ground formed on the upper surface is provided on the lower surface of the exposed outer conductor and the inner conductor and reinforced, and the outer conductor and the conductive layer of the reinforcing plate with the adhesive are solder-connected. This is the end of the cable.

[0014]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 4 shows a terminal portion of a round conductor multi-core cable according to a preferred embodiment of the present invention. FIG. 4 (a) is a plan view, and FIG. 4 (b) is a sectional view taken along line GG of FIG. 4 (c) is H
FIG. 4D is a cross-sectional view taken along the line H, and FIG. 4D is a side view.

As shown in FIGS. 4A to 4D, the terminal portion 1 of the round conductor multi-core cable according to the present invention is mounted in advance on an electronic device such as an LCD used in a notebook computer or the like. The FPC connector is inserted and connected. In the end portion 1 of the round conductor multicore cable, for example, a round single-wire conductor is used as the round conductor.

The end portion 1 of the round conductor multi-core cable has a plurality of insulated cables 4a, 4b,... Formed by covering round single-wire conductors 2a, 2b.
Are arranged in parallel at a predetermined arrangement pitch p, and the central portions of the insulated cables 4a, 4b,.
5 are fixed from above and below, and the insulators 3a, 3b at both ends of the fixed insulated cables 4a, 4b are removed to expose the round conductors 2a, 2b. 2a, 2b... Are respectively transformed into flat single-wire conductors 6a, 6b. FIG. 4 illustrates an example in which 11 insulated cables are arranged in parallel.

The insulators 3a, which cover the flat single-wire conductors 6a, 6b... And the round single-wire conductors 2a, 2b.
Adhesive films 7, 7 having an adhesive layer formed on the upper surface are attached to the lower surfaces of both ends of 3b. The exposed round single-wire conductors 2a, 2b ... are replaced with flat single-wire conductors 6a, 6b.
Are deformed from the initial arrangement pitch p, but after the exposed round single-wire conductors 2a, 2b are deformed into flat single-wire conductors 6a, 6b, the flat single-wire conductors 6a, 6b
.. can be fixed at the initial arrangement pitch p by rearranging the... b so as to have the initial arrangement pitch p and further attaching the films with adhesive 7. .

On the lower surfaces of the films 7 with adhesive, reinforcing plates 8 with adhesive having an adhesive layer formed on the upper surface are provided to reinforce the terminal portions 1 of the round conductor multi-core cable. ing. The thickness of the reinforcing plate 8 with adhesive is set to be larger than the thickness of the film 7 with adhesive in order to secure the strength of the terminal portion. The area of the reinforcing plate 8 with adhesive is the same as the area of the film 7 with adhesive.

The thickness Ds at the end of the end portion 1 of the round conductor multi-core cable, that is, the thickness from the bottom surface of the reinforcing plate 8 with adhesive to the top surface of the flat single-wire conductors 6a, 6b. FP
It can be inserted into the concave insertion groove of the C connector,
., and the contacts of the connector are electrically connected to each other.

A feature of the present invention is that an existing F of a cable having a round conductor (including a coaxial cable as described later) is used.
Only the part to be inserted into the PC connector is transformed from a round conductor to a flat conductor, and the flat conductor is aligned and fixed at a predetermined pitch using the same structure as FPC or FFC, that is, using a film with an adhesive and a reinforcing plate. And that the thickness was adjusted to the prescribed value of the existing FPC connector.

Next, the manufacturing procedure of the terminal portion 1 of the round conductor multi-core cable will be described in more detail with reference to FIGS.

FIG. 1 is a plan view (a) showing a step of exposing a round single-wire conductor in a terminal portion of a round conductor multi-core cable, a sectional view taken along line AA (b), and a sectional view taken along line BB. (C). FIG. 2 is a plan view (a) showing a step of transforming a round single-conductor conductor into an exposed flat single-conductor at a terminal portion of the round-conductor multi-core cable, a cross-sectional view taken along a line C-C of FIG. It is a sectional view (c) of the D line. FIG. 3 is a plan view (a) showing a step of attaching a film with an adhesive to a flat single-wire conductor in a terminal portion of a round conductor multicore cable, a cross-sectional view taken along line EE (b), and a line FF. It is sectional drawing (c) and side view (d).

As shown in FIGS. 1A to 1C, first,
.. Are arranged in parallel so that the arrangement pitch p is 0.5 mm, and adhesive tapes 5 and 5 are attached from above and below to form insulated cables 4a, 4b.
... is fixed. The obtained tape-shaped round conductor multicore cable is cut so that the length L becomes 200 mm. Each of the insulated cables 4a, 4b,. 4mm
As described above, the insulators 3a, 3b,.
a, 2b ... are exposed.

Next, as shown in FIGS. 2A to 2C,
Each of the exposed round single-wire conductors 2a, 2b... Is aligned on a lower mold having grooves formed at a pitch of 0.5 mm, and the upper single mold presses each of the round single-wire conductors 2a, 2b. , Having a width d of 0.3 mm ± 0.03.

Subsequently, as shown in FIGS. 3A to 3D, the flat single-wire conductors 6a, 6b,.
Re-aligned to be 5 mm, and the flat single-wire conductors 6a, 6a
.. and adhesive films 7, 7 having an adhesive layer formed on the upper surfaces thereof, on the lower surfaces of both ends of insulators 3 a, 3 b, which cover the unexposed round single-wire conductors 2 a, 2 b. Paste and fix.

Further, as shown in FIGS. 4 (a) to 4 (d), adhesive reinforcing plates 8, 8 having an adhesive layer formed on the upper surface are attached to the lower surfaces of the adhesive films 7, 7, respectively. When it is reinforced, the end portion 1 of the round conductor multicore cable is completed.
The thickness D of the end portion 1 of the round conductor multi-core cable is 0.3 m
m ± 0.05.

As described above, in the terminal portion 1 of the round conductor multi-core cable according to the present invention, only the portion to be inserted into the FPC connector already mounted on the electronic device side is changed from the round conductor to the flat conductor. Since it is deformed and has the same structure as FPC and FFC, that is, the flat conductor is aligned and fixed at a predetermined pitch using a film with adhesive and a reinforcing plate with adhesive, and the thickness is adjusted to the specified value of the existing FPC connector. It is possible to directly insert and connect to the existing FPC connector without changing the existing FPC connector.

Moreover, the portion that is not inserted into the FPC connector, that is, the conductor portion covered with the insulator is a round conductor, so that it has better wiring and flexibility than a rectangular conductor. Also, bundled wiring is possible.

Next, a second embodiment will be described.

FIG. 5 is a plan view (a) of a terminal portion of a round conductor multi-core cable according to a second embodiment of the present invention, and FIG.
-I line sectional view (b), JJ line sectional view (c), side view (d).

As shown in FIG. 5, the terminal portion 50 of the round conductor multi-core cable is formed by removing the insulators 4a, 4b at both ends of the insulated cables 4a, 4b.
Are exposed, and films 7 and 7 with adhesive are adhered and fixed to the lower surfaces of the exposed round single-wire conductors 4a, 4b, and reinforcing plates 8 and 8 with adhesive are formed on the lower surfaces of the films 7 and 7 with adhesive. And reinforced.

The terminal portion 50 of the round conductor multi-core cable cannot be directly inserted into an existing FPC connector and connected. However, if the contact shape of the FPC connector is changed, the terminal portion 50 can be used as a round conductor. It is. The terminal portion 50 of the round conductor multi-core cable has an advantage that the terminal portion 50 of the round conductor multi-core cable has better wiring and flexibility than the terminal portion 50 of the round conductor multi-core cable described with reference to FIG.

In the above embodiment, an example was described in which a round single conductor was used as the round conductor, but a pre-soldered stranded wire, a high-wrap conductor, or the like may be used as the round conductor. Further, the present invention can be directly connected to an FPC connector for connection, but can also be applied to soldering to an FPC, a printed circuit board, or the like instead of an FPC connector.

Next, a third embodiment will be described.

FIG. 6 is a plan view of a terminal portion of a coaxial cable according to a third embodiment of the present invention.

As shown in FIG. 6, the terminal section 60 of the coaxial cable according to the present invention is for connecting to a FPC connector with GND which is mounted in advance on an electronic device such as an LCD. Each of the coaxial cables 61a, 61b,...
a, 63b... respectively, and internal insulators 63a, 6
Are provided on the outer circumference of the outer conductors 65a, 64b, respectively.
5b.

The coaxial cable terminal 60 has a plurality of coaxial cables 61a, 61b,... Arranged in parallel, and external insulators 65 at both ends of each coaxial cable 61a, 61b,.
., and the inner insulators 63a, 63b... are removed, and the outer conductors 64a, 64b.
Are exposed, and the exposed internal conductors 62a, 62b... Are transformed into flat conductors 66a, 66b.

On the lower surfaces of the exposed outer conductors 64a, 64b,... And the inner conductors 62a, 62b,... And reinforced the terminal portion 60 of the coaxial cable. The conductive layer 67 on the upper surface of the reinforcing plate 68 with the adhesive is formed so as to have the same pitch as the flat conductors 66a, 66b. Outer conductors 64a, 6
.. And the conductive layer 67 of the reinforcing plate with adhesive 68 are connected by soldering.

As described above, in the terminal portion 60 of the coaxial cable according to the present invention, only the portion to be inserted into the FPC connector with GND is changed from a round conductor to a flat conductor, and a reinforcing plate with an adhesive is used. Align and fix flat conductors at a predetermined pitch,
Since the thickness is adjusted to the specified value of the existing FPC connector with GND, it is possible to directly insert and connect to the existing FPC connector with GND without changing the existing FPC connector with GND.

Thus, the present invention can be applied to a coaxial cable having a small high-frequency loss and a simple terminal processing, and can be adapted to a high image quality LCD.

When a coaxial cable is used, for example, an adhesive layer for aligning and fixing flat conductors at a predetermined pitch is formed on one surface of a reinforcing plate with an adhesive, and on the other surface, A conductive layer may be formed as a ground wiring pattern, and the outer conductor of the coaxial cable and the conductive layer may be connected by soldering or the like. Also in this case, the existing FP with GND
Connection with the C connector becomes possible.

[0043]

As is apparent from the above description,
According to the present invention, the following excellent effects are exhibited.

(1) The FPC connector already mounted on the electronic device can be directly inserted into the FPC connector without changing the FPC connector, and the wiring and flexibility are excellent. Bundled wiring is also possible.

(2) Applicable to coaxial cable,
It is possible to cope with higher image quality of the LCD.

[Brief description of the drawings]

FIG. 1 is a plan view (a) showing one step in a preferred embodiment of the present invention, a sectional view taken along line AA (b), and a sectional view taken along line BB (c).

FIGS. 2A and 2B are a plan view showing a next step of a terminal portion of the round conductor multi-core cable shown in FIG. 1, a sectional view taken along a line CC of FIG. 1B, and a sectional view taken along a line DD of FIG. It is.

3A is a plan view showing the next step of the terminal portion of the round conductor multi-core cable shown in FIG. 2, FIG. 3B is a sectional view taken along line EE, FIG. , Side view (d).

FIG. 4 is a plan view (a) showing a preferred embodiment of the present invention,
It is the sectional view on the GG line (b), the sectional view on the HH line (c), and the side view (d). (The following process of the terminal part of the round conductor multi-core cable shown in FIG. 3 is shown. There).

5A is a plan view of a terminal portion of a round conductor multi-core cable according to a second embodiment of the present invention, FIG. 5B is a sectional view taken along line II, FIG. ), Side view (d).

FIG. 6 is a plan view of a terminal portion of a coaxial cable according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Terminal part of round conductor multicore cable 2a, 2b ... Round single-wire conductor (round conductor) 3a, 3b ... Insulator 4a, 4b ... Insulated cable 6a, 6b ... Flat single-wire conductor (flat conductor)

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Daisuke Kimoto 4-10-1, Kawajiri-cho, Hitachi-shi, Ibaraki F-term in Hitachi Cable Finetech Co., Ltd. 5E023 AA04 BB07 BB09 BB29 HH16 HH30 5G355 AA08 BA08 BA11 CA05 5G375 AA10 AA11 CA02 CA03 CA12 CA19 CC07 CD17 DA08 DB16

Claims (4)

[Claims] At the end of a round conductor multi-core cable in which a plurality of insulated cables each formed by covering a round conductor with an insulator, the insulator at both ends of each insulated cable is removed. An end portion of a round conductor multicore cable, wherein the round conductor is exposed and the exposed round conductor is transformed into a flat conductor. 2. A round conductor is exposed by removing insulators at both ends of each insulated cable, the exposed round conductor is transformed into a flat conductor, and a film with an adhesive is attached to the lower surface of the flat conductor. 2. The end portion of the round conductor multi-core cable according to claim 1, wherein the end portion is fixed by being attached and reinforced by providing a reinforcing plate with an adhesive on a lower surface of the film with an adhesive. 3. At the terminal portion of a round conductor multi-core cable in which a plurality of insulated cables each formed by covering a round conductor with an insulator, the insulator at both ends of each insulated cable is removed. A round shape wherein the round conductor is exposed, a film with an adhesive is stuck and fixed to the lower surface of the exposed round conductor, and a reinforcing plate with an adhesive is provided on the lower surface of the film with the adhesive and reinforced. Terminal part of multi-conductor cable. 4. A coaxial cable having a plurality of coaxial cables arranged in parallel, wherein the inner conductor is covered with an inner insulator, an outer conductor is provided on the outer periphery of the inner insulator, and the outer conductor is covered with the outer insulator. At the end of the coaxial cable, remove the outer and inner insulators at both ends of each coaxial cable to expose the outer and inner conductors, transform the exposed inner conductors into flat conductors, A coaxial cable characterized in that a reinforcing plate with an adhesive having a conductive layer for ground formed on the upper surface is provided on the lower surface of the conductor and reinforced, and the external conductor and the conductive layer of the reinforcing plate with the adhesive are connected by soldering. Terminal section.