JPH11329092A - Flat cable and laying method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower or prevent a cross talk between conductors while arranging all of the periphery of conductors adjacent cores in the ground by alternately arranging cores having a different diameter of a conductor and/or a different thickness of an insulator for bonding so as to form them flat. SOLUTION: Cores 3 respectively having a different diameter of a conductor 1 and/or a different thickness of an insulator 2 are alternately arranged for bonding so as to form a flat cable 4. One of the adjacent cores having a different diameter of the conductor 1 and/or a different thickness of the insulator 2 is arranged in a ground side, and the other is arranged in a signal side for alternating arrangement, and a signal transmitting circuit is thereby formed. Furthermore, plural kinds of them are laminated or the excessive part is folded for lay out. Crest parts and valley parts are alternately arranged for lamination, and all of the periphery of the conductor of the core adjacent to any core is arranged in the ground side, or all of the periphery of the adjacent conductor displaced by one core can be arranged in the ground. With this structure, cross talk between the conductors can be prevented so as to improve the reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat cable which constitutes a signal transmission circuit between information processing apparatuses and serves as a signal transmission path. The flat cable can reduce or prevent crosstalk between the flat cable and an adjacent conductor. The present invention relates to the realization of a cable and its laying method.

[0002]

2. Description of the Related Art As shown in FIG. 11B, a conventional flat cable 54 shown in cross section in FIG. 11 has conductors 51 having a constant diameter arranged at predetermined intervals and having a constant thickness. The insulator 52 and the conductor 51 are formed by injection molding or the like so as to have a capsule-shaped cross-section in a flat shape with a substantially flat surface. Alternatively, as shown in FIG. 11A, a wire core 5 having a conductor 51 having a predetermined diameter and an insulator 52 having a predetermined thickness.
3 are arranged at a predetermined interval and joined to form a corrugated flat surface. When the conventional flat cable is applied to a signal transmission circuit between information processing apparatuses and a plurality of types of signal transmission circuits are stacked or a portion of the surplus length of the flat cable is folded and laid, FIG.
As shown in (b) and (b), between an arbitrary signal core S and a conductor such as an adjacent core, a flat cable alone can be stacked even if the adjacent conductor is set as the ground core G. However, it is not always possible to make all the surroundings where the adjacent conductors are in an ideal form become grounds, and crosstalk with the adjacent conductors may occur.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the following problems of the conventional flat cable. When applied to a signal transmission circuit between information processing devices and stacked or laid by laying the surplus length part of a flat cable, a conductor such as an arbitrary core and an adjacent core However, it is not always possible to make all of the surroundings where the adjacent conductor has an ideal form be ground, and crosstalk with the adjacent conductor may occur. Therefore, a malfunction or the like occurs in signal transmission between the information processing apparatuses, which affects the reliability of the information processing apparatus.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention solves the above-mentioned problem by using a wire core having different conductor diameters and / or insulator thicknesses so as to improve cross-talk with an adjacent conductor of a flat cable. It was constructed by alternately arranging and joining. By this means, when applied to a signal transmission circuit between information processing devices, a plurality of types of signal transmission circuits are stacked, or a surplus length portion of a flat cable is folded and laid, an arbitrary core and an adjacent core are used. Between adjacent conductors is ideal, and the surrounding area can be grounded. By improving crosstalk with adjacent conductors, signal transmission between information processing devices may malfunction. Provided is a flat cable that is less likely to cause a problem and can maintain high reliability of an information processing device.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, as shown in FIG. 1, in the present invention, wire cores 3 having different diameters of conductors 1 and / or insulators 2 are alternately arranged and joined. By this means, when a plurality of types of signal transmission circuits are applied to a signal transmission circuit between information processing apparatuses, or a surplus length portion of a flat cable is folded and laid, an arbitrary core and an adjacent core are laid. With such conductors, all of the surroundings of the adjacent conductor can be grounded, and the effect of reducing or preventing crosstalk with the adjacent conductor is obtained.

Next, as shown in FIG. 2, according to the present invention, the wire core 3 is constituted by insulators 2 having the same diameter of the conductor 1 and two different thicknesses. It is configured to be compatible with a press-connecting connector that can be connected to the connector terminal. By this means, since the surface is configured in a flat form of the waveform, it is applied to a signal transmission circuit between information processing devices, and a plurality of types of signal transmission circuits are stacked or a surplus length portion of a flat cable is used. When folded and laid, the chevron part and the trough part mesh with each other, and any wire core is shifted by one wire core, and the wire core and the adjacent wire core overlap each other, and the entire circumference of the adjacent conductor is grounded. Get the action that can be.

Further, as shown in FIG. 3, in the present invention, the wire core 3 is composed of insulators 2 having the same diameter of the conductor 1 and two different thicknesses. 2 was formed so as to be thicker. By this means, both ends of the cable are formed so that the thickness of the insulator is larger, so that the cable can be used as a protective wire and the thinner core can be easily affected by, for example, induction of electromagnetic waves from the outside. Thus, an effect of always laying a certain gap can be obtained.

[0008] Further, as shown in FIG.
The insulator 2 was formed integrally by sandwiching the conductor 1 by providing a peak and a valley so as to have two different thicknesses. By this means, the surface is configured in the form of a waveform, so that it is applied to a signal transmission circuit between information processing apparatuses, and a plurality of types of signal transmission circuits are stacked or a surplus length portion of a flat cable is folded and laid. In this case, the chevron portion and the valley portion are engaged with each other, an arbitrary wire core is displaced by one wire core, and the stacking thickness can be suppressed. The effect that all the surroundings can be grounded is obtained. By adopting a form in which the slopes of the peaks and valleys are linear and the cross section is quadrilateral or the like, engagement can be ensured.

Next, as shown in FIG. 5, according to the present invention, the wire core 3 is connected by allocating the thicker insulator 2 to the ground side and the thinner insulator 2 to the signal side. Configured. By this means, the surface is configured in the form of a waveform, so that it is applied to a signal transmission circuit between information processing devices, and a plurality of types of signal transmission circuits are stacked or a surplus length portion of a flat cable is folded and laid. In this case, the chevron and the trough engage with each other, and
The arbitrary wire core and the adjacent wire core are shifted by the wire core, so that the entire circumference of the adjacent conductor can be grounded, and the outer side is grounded when the thicker wire core is stacked or folded. Therefore, the narrower signal side can be laid with a certain gap between the external component of the information processing apparatus and a surface that is easily affected by external electromagnetic waves such as a cover plate. Get.

Further, as shown in FIG. 6, in the present invention, the wire core 3 is configured such that the thicker insulator 2 is assigned to the signal side and the thinner insulator 2 is assigned to the ground side. did. By this means, since the surface is configured in a waveform form, the outer side is assigned to the signal side when the thicker core is stacked or folded, so the thicker signal side is used as an internal component of the information processing device. For example, an effect of laying in close proximity to a large-area ground surface such as a partition plate is obtained.

As shown in FIG. 7, in the present invention, the insulator 2 is suitable for a crimp-type connector in which the thickness of the insulator 2 is the same and both ends of the flat cable can be connected to the terminals of the connector with less restrictions on the conductors. In order to be able to do so, it was constituted by conductors 1 having two different diameters. By this means, the surface is configured in a flat form of a waveform, so that it is applied to a signal transmission circuit between information processing apparatuses, and a plurality of types of signal transmission circuits are stacked or a surplus length portion of a flat cable is folded. In this case, the inductance of the transmission circuit can be improved, and the chevron portion and the trough portion mesh with each other so that an arbitrary core is shifted by one core and the arbitrary core overlaps with the adjacent core. The effect is obtained that the entire area around the conductor can be grounded.

Further, as shown in FIG. 8, in the present invention,
The wire core 3 was configured such that the larger diameter of the conductor 1 was assigned to the signal side and the smaller diameter of the conductor 1 was assigned to the ground side. By this means, since the surface is configured in a flat form of the waveform, it is applied to a signal transmission circuit between information processing devices, and a plurality of types of signal transmission circuits are stacked or a surplus length portion of a flat cable is used. When folded and laid, the chevron part and the trough part mesh with each other, and any wire core is shifted by one wire core, and the wire core and the adjacent wire core overlap each other, and the entire circumference of the adjacent conductor is grounded. In addition, since the outer side is assigned to the signal side when the thicker wire core is stacked or folded, the thicker signal side is used as a ground for a large area of an internal component of the information processing device, such as a partition plate. An effect that can be laid in close proximity to a surface is obtained.

Next, as shown in FIG. 9, in the present invention, the wire core 3 is configured such that the larger diameter of the conductor 1 is assigned to the ground side and the smaller diameter of the conductor 1 is assigned to the signal side. .
By this means, the ground line can be strengthened and the surface is configured in the form of a waveform, so that it is applied to a signal transmission circuit between information processing devices and a plurality of types of signal transmission circuits are stacked or a surplus length of a flat cable. In the case where the portion is folded and laid, the chevron portion and the valley portion mesh with each other, and an arbitrary wire core is shifted by one wire core, and the arbitrary wire core and the adjacent wire core overlap each other and surround the adjacent conductor. Can be grounded, and the outer side is assigned to the ground side when the thicker wire core is stacked or folded, so the thinner signal side is used as an external component of the information processing device, such as a cover plate. The effect of being able to lay with a certain gap from a surface that is easily affected by the induction of electromagnetic waves from the outside is obtained.

As shown in FIG. 10, in the present invention,
In order to improve cross-talk between adjacent conductors of a flat cable, a flat cable composed of alternately bonded cores with different conductor diameters and / or insulator thicknesses is placed around signal lines when folded. The method of laying the flat cable to be laid so that the ground line is arranged is adopted. By this means, when a plurality of types of signal transmission circuits are applied to a signal transmission circuit between information processing apparatuses, or a surplus length portion of a flat cable is folded and laid, an arbitrary core and an adjacent core are laid. With such a conductor, an effect is obtained in which the entire periphery of an adjacent conductor can be grounded.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; FIG.

The symbols used in the drawings of the embodiments of the present invention shown in FIGS. 1 to 10 will be collectively described below.
Reference numeral 1 denotes a conductor of a flat cable 4 made of a copper wire or the like that is applied to a signal transmission circuit between information processing apparatuses and is a component of the signal transmission circuit. Reference numeral 2 denotes an insulator made of vinyl chloride or the like which protects the conductors 1 of the flat cable 4 and secures a predetermined distance between the conductors 1. 3 is a flat cable 4 composed of a flat cable conductor 1 and an insulator 2
Is the core of the smallest component of. 4 is a flat cable of the present invention.

FIG. 1 is a principle view of the present invention, and is shown in a cross section. In the figure, the flat cable of the present invention
For example, a flat cable 4 having ten cores is formed by alternately arranging and joining cores 3 having different diameters of the conductors 1 and / or insulators 2 so as to improve crosstalk with an adjacent conductor. . When this flat cable is applied to a signal transmission circuit between information processing devices and a plurality of types of signal transmission circuits are stacked or a surplus length portion of the flat cable is folded and laid, an arbitrary core and an adjacent core are laid. In such a case, all the surroundings where the adjacent conductor is in an ideal form can be grounded. As a result, crosstalk between adjacent conductors can be reduced or prevented, so that malfunctions and the like of signal transmission between information processing devices can be reduced, and the reliability of the information processing device can be maintained high. it can.

FIG. 2 is a sectional view of an embodiment of the present invention. In the same figure, the flat cable 4 of the present invention
The conductor 3 has the same diameter as the conductor 1 and is made of two insulators 2 having different thicknesses, and the surface is formed in a flat shape with a waveform, and both ends of the flat cable are efficiently connected to the connector. It is configured to be compatible with a press-connecting connector that can be connected to terminals. When this flat cable is applied to a signal transmission circuit between information processing devices and multiple types of signal transmission circuits are stacked or the extra length of the flat cable is folded and laid, the chevron and valley mesh Thus, an arbitrary wire core is shifted by one wire core, and the arbitrary wire core and an adjacent wire core overlap, so that the entire periphery of an adjacent conductor can be grounded.

FIG. 3 is a sectional view of another embodiment of the present invention. In the figure, in a flat cable 4 of the present invention, the wire core 3 is constituted by insulators 2 having the same diameter of the conductor 1 and two different thicknesses, and furthermore, both ends of the flat cable have a large thickness of the insulator 2. And the odd number of cores. Since this flat cable is configured such that both ends of the cable are formed with a thicker insulator, the flat cable can be used as a protection line for the cable and the thinner core is easily affected by, for example, induction of electromagnetic waves from the outside. It is always laid with a constant gap g from a cover plate or the like.
Thus, a constant gap g is always taken from a ground surface which is easily affected by external electromagnetic waves such as a cover plate which is easily affected by external electromagnetic waves and the like of the external components of the information processing apparatus. Laying can improve crosstalk. The protection wire may be used as a means for detecting disconnection of the flat cable and checking connection with a connector.

FIG. 4 is a sectional view of another embodiment of the present invention. In the figure, a flat cable 4 according to the present invention is obtained by integrating the insulator 2 by injection molding or the like by providing a ridge and a valley so that the insulator 2 has two different thicknesses and sandwiching the conductor 1 from both upper and lower sides. Was configured. Because of this, since the surface is configured in a waveform form, it is applied to a signal transmission circuit between information processing devices, and a plurality of types of signal transmission circuits are stacked or a surplus length portion of a flat cable is folded and laid. In this case, the chevron portion and the valley portion are engaged with each other, an arbitrary wire core is displaced by one wire core, and the stacking thickness can be suppressed. Everything around can be grounded. The engagement can also be ensured by adopting a form in which the cross-section where the slopes of the peaks and valleys are linear is quadrangular or the like.

FIG. 5 is a sectional view of another embodiment of the present invention. In the figure, the flat cable 4 of the present invention is, for example, the wire core 3 having the form shown in FIG.
With the thicker insulator 2 on the ground wire core G side,
The smaller thickness of the insulator 2 was assigned to the signal line core S side for connection. Because of this, since the surface is configured in a waveform form, it is applied to a signal transmission circuit between information processing devices, and a plurality of types of signal transmission circuits are stacked or a surplus length portion of a flat cable is folded and laid. In this case, the chevron portion and the valley portion mesh with each other, an arbitrary core is displaced by one core, and the desired core and the adjacent core overlap, and the entire periphery of the adjacent conductor is grounded. When the thicker wire core is stacked or folded, the outer side is assigned to the ground wire core side, so the thinner signal wire core side can be used from outside of an external component of the information processing device, such as a cover plate. Crosstalk can be improved by laying a surface that is susceptible to induction of electromagnetic waves and a certain gap g.

FIG. 6 shows another embodiment of the present invention, which is shown in cross section. In the figure, the flat cable 4 of the present invention is, for example, the wire core 3 having the form shown in FIG.
The thicker insulator 2 is assigned to the signal wire core S side, and the thinner insulator 2 is assigned to the ground wire core G side. Because of this, since the surface is configured in a waveform form, it is applied to a signal transmission circuit between information processing devices, and a plurality of types of signal transmission circuits are stacked or a surplus length portion of a flat cable is folded and laid. In this case, the chevron part and the trough part are engaged with each other, and an arbitrary core is shifted by one core, and the arbitrary core and an adjacent core overlap and all of the periphery of the adjacent conductor is grounded. When the thick wire core is stacked or folded, the outside is assigned to the signal wire core side, so the thick signal wire core side has a large area such as a partition plate of an internal component of the information processing device, such as a partition plate. It can be laid close to the ground plane, and crosstalk can be improved.

FIG. 7 is a sectional view of another embodiment of the present invention. In the figure, the flat cable 4 of the present invention is different from the flat cable 4 in that the insulator 2 has the same thickness, and can be adapted to a crimp-type connector that can connect both ends of the flat cable to the terminals of the connector with less restrictions on conductors. It was composed of two diameter conductors 1. Since this flat cable has a flat surface with a waveform, it can be applied to signal transmission circuits between information processing devices to stack multiple types of signal transmission circuits or to reduce the excess length of the flat cable. When folded and laid, the inductance of the transmission circuit can be improved, and the chevron portion and the trough portion mesh with each other, and any wire core is shifted by one wire core and the wire core and the adjacent wire core overlap, Everything around the adjacent conductor can be grounded.

FIG. 8 is another embodiment of the present invention, which is shown in cross section. In the figure, the flat cable 4 of the present invention is configured such that the wire core 3 is connected to the conductor 1 with the larger diameter on the signal wire S side and the smaller diameter on the conductor 1 on the ground wire G side. . As a result, since the surface is configured in a flat shape of a waveform, the present invention is applied to a signal transmission circuit between information processing devices, and a plurality of types of signal transmission circuits are stacked or a surplus length portion of a flat cable is used. When folded and laid, the chevron part and the valley part mesh with each other and the arbitrary core is displaced by one core, and the arbitrary core and the adjacent core overlap and the entire periphery of the adjacent conductor is grounded. In addition, since the outer side is assigned to the signal side when the thicker wire core is stacked or folded, the thicker signal side is used as a ground surface of a large area such as a partition plate of an internal component of the information processing device. Crosstalk can be improved by laying them close to each other.

FIG. 9 is a sectional view showing another embodiment of the present invention. In the same figure, the flat cable 4 of the present invention is configured such that the wire core 3 is connected to the conductor 1 with the larger diameter on the ground wire G side and the smaller conductor 1 on the signal wire S side. . As a result, the ground line can be strengthened and the surface is configured in a flat shape with a waveform. Therefore, the present invention is applied to a signal transmission circuit between information processing devices, and a plurality of types of signal transmission circuits are stacked or a flat cable is used. When the surplus length portion is folded and laid, the chevron portion and the valley portion mesh with each other, and any wire core is displaced by one wire core, and the wire core and the wire core adjacent to each other overlap and the conductor of the adjacent conductor The entire periphery can be the ground core G, and the outer side is assigned to the ground core side when the thicker core is stacked or folded, so that the thinner signal core side is external to the information processing device. Crosstalk can be improved by laying the component with a predetermined gap g and a surface that is susceptible to external electromagnetic wave induction such as a cover plate.

FIG. 10 is a diagram showing another embodiment of the present invention.
Shown in cross section. In the figure, the flat cable laying method of the present invention is configured by alternately arranging and joining wire cores having different conductor diameters and / or insulator thicknesses so as to improve crosstalk between the flat cable and an adjacent conductor. The flat cable thus laid was laid such that a ground line was arranged around a signal line when the flat cable was folded. By this, when a plurality of types of signal transmission circuits are applied to a signal transmission circuit between information processing apparatuses, or a surplus length portion of a flat cable is folded and laid, an arbitrary core and an adjacent core are laid. In such a case, the entire periphery of the adjacent conductor can be grounded, so that crosstalk with the adjacent conductor can be improved.

[0027]

According to the present invention described above, the following effects can be expected.

First, wire cores having different conductor diameters and / or insulator thicknesses were alternately arranged and joined. With this, when a plurality of types of signal transmission circuits are applied to a signal transmission circuit between information processing apparatuses, or a surplus length portion of a flat cable is folded and laid, an arbitrary core and an adjacent core are laid. In the case of a conductor such as an adjacent conductor, the entire periphery where the adjacent conductor is in an ideal form can be grounded, crosstalk with the adjacent conductor can be reduced or prevented, and signals between information processing devices can be reduced. Malfunctions and the like in transmission can be reduced, and the reliability of the information processing apparatus can be maintained high.

Next, the wire core is made to have the same conductor diameter,
It consisted of insulators of two different thicknesses. As a result, since the surface is configured in a flat shape of a waveform, the present invention is applied to a signal transmission circuit between information processing devices, and a plurality of types of signal transmission circuits are stacked or a surplus length portion of a flat cable is used. When folded and laid, the chevron part and the valley part mesh with each other and the arbitrary core is displaced by one core, and the arbitrary core and the adjacent core overlap and the entire periphery of the adjacent conductor is grounded. In addition to the above-described effects, the present invention can be adapted to a press-connecting connector that can be efficiently connected, and can be efficiently connected to the connector.

Further, the wire core is made to have the same diameter of the conductor,
The flat cable was constituted by two insulators having different thicknesses, and both ends of the flat cable were constituted so that the insulator had a larger thickness. Because of this, since both ends of the cable are configured so that the thickness of the insulator is larger, in addition to the above-described effects, the cable can be used as a protection wire and the thinner core can be affected by induction of electromagnetic waves from the outside. It can be laid with a constant gap from a cover plate or the like which is easily affected by electromagnetic waves, and crosstalk of electromagnetic waves of the information processing apparatus can be improved. Further, the protection wire can be used as a means for detecting disconnection of the flat cable and checking connection with the connector.

Further, the insulator is formed integrally by providing a peak portion and a valley portion and sandwiching the conductor from both the upper and lower sides. In this way, since the surface is configured in the form of a waveform, in addition to the above-described effects, a plurality of types of signal transmission circuits can be stacked or applied to a signal transmission circuit between information processing apparatuses or the surplus length of a flat cable. When the part is folded and laid, the chevron part and the valley part are engaged with each other,
The stacking thickness can be suppressed by shifting by the wire core, and the arbitrary wire core and the adjacent wire core can be easily overlapped and the entire periphery of the adjacent conductor can be easily grounded. The engagement can also be ensured by adopting a form in which the cross-section where the slopes of the peaks and valleys are linear is quadrangular or the like.

Next, the above-mentioned wire cores were connected so that the thicker insulator was assigned to the ground wire core and the thinner insulator was assigned to the signal wire core side. In this way, since the surface is configured in the form of a waveform, in addition to the above-described effects, a plurality of types of signal transmission circuits can be stacked or applied to a signal transmission circuit between information processing apparatuses or the surplus length of a flat cable. When the part is folded and laid, the chevron part and the valley part mesh with each other and the arbitrary core is shifted by one core, and the arbitrary core overlaps with the adjacent core so that the circumference of the adjacent conductor is overlapped. All can be grounded, and the outer side is assigned to the ground core side when the thicker core is stacked or folded, so the narrower signal core side is, for example, a cover of an external component of the information processing device. Crosstalk can be improved by laying a certain gap from a surface such as a plate that is easily affected by induction of electromagnetic waves from the outside.

Further, the wire core is connected and assigned such that the thicker insulator is assigned to the signal wire core and the thinner insulator is assigned to the ground wire core. This allows
Since the surface is configured in the form of a waveform, in addition to the above-described effects, the present invention is applied to a signal transmission circuit between information processing apparatuses, and a plurality of types of signal transmission circuits are stacked or a surplus length portion of a flat cable is folded. In the case of laying in, the chevron portion and the valley portion mesh with each other, any wire core is shifted by one wire core, and the stacking thickness can be suppressed. Therefore, the thicker signal line core can be laid close to a wide ground plane such as a partition plate of an internal component of the information processing apparatus, and crosstalk can be improved.

Next, the insulator was made up of conductors having the same thickness and two different diameters. As a result, since the surface is configured in the form of a flattened waveform, in addition to the above-mentioned effects, a plurality of types of signal transmission circuits can be stacked or applied to a signal transmission circuit between information processing devices or a surplus flat cable can be used. When the length portion is folded and laid, the inductance of the transmission circuit can be improved, and the chevron portion and the valley portion are engaged with each other so that an arbitrary core is shifted by one core and a line adjacent to the arbitrary core. The core can be overlapped and grounded around the adjacent conductor, and both ends of the flat cable can be fitted to crimp-type connectors that can be connected to the terminals of the connector with fewer conductors. it can.

Further, the wire core is configured such that the larger conductor diameter is assigned to the signal side and the smaller conductor diameter is assigned to the ground side. Because of this, since the surface is configured in a flat shape of a waveform, in addition to the above-described effects, a plurality of types of signal transmission circuits can be stacked or applied to a signal transmission circuit between information processing devices by stacking or flat cable. When the surplus length portion is folded and laid, the chevron portion and the valley portion mesh with each other, an arbitrary core is shifted by one core, and the arbitrary core overlaps with an adjacent conductor. Can be grounded, and the outer side is assigned to the signal side when the thicker wire core is stacked or folded. Crosstalk can be improved by laying in close proximity to a large area ground plane.

Further, the wire core is configured such that the larger conductor diameter is assigned to the ground side and the smaller conductor diameter is assigned to the signal side. As a result, the ground line can be strengthened, and the surface is configured in the form of a waveform. In addition to the above-described effects, a plurality of types of signal transmission circuits can be stacked by being applied to a signal transmission circuit between information processing devices. Alternatively, when the surplus length portion of the flat cable is folded and laid, the chevron portion and the valley portion mesh with each other, and the arbitrary core is shifted by one core and the arbitrary core overlaps with the adjacent core. The entire periphery of adjacent conductors can be grounded, and the outer side is assigned to the ground side when the thicker core is stacked or folded, so the thinner signal side is used as an external component of the information processing device. For example, crosstalk can be improved by laying a predetermined gap from a surface, such as a cover plate, which is easily affected by induction of electromagnetic waves from the outside.

Next, a flat cable formed by alternately arranging and joining wire cores having different diameters of conductors and / or insulators is arranged such that a ground wire is arranged around a signal wire when folded. The method of laying the flat cable to be laid was adopted. With this, when a plurality of types of signal transmission circuits are applied to a signal transmission circuit between information processing apparatuses, or a surplus length portion of a flat cable is folded and laid, an arbitrary core and an adjacent core are laid. Can be grounded, so that cross-talk with adjacent conductors can be improved, signal transmission between information processing devices is less likely to malfunction, and reliability of information processing devices Can be kept high.

[Brief description of the drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is an embodiment diagram of the present invention.

FIG. 3 is another embodiment of the present invention.

FIG. 4 is another embodiment of the present invention.

FIG. 5 is another embodiment of the present invention.

FIG. 6 is another embodiment of the present invention.

FIG. 7 is a diagram showing another embodiment of the present invention.

FIG. 8 is another embodiment of the present invention.

FIG. 9 is a view showing another embodiment of the present invention.

FIG. 10 is another embodiment of the present invention.

FIG. 11 is an example of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conductor 2 Insulator 3 Wire core 4 Flat cable

Claims (10)

[Claims] 1. A flat cable, wherein wires (3) having different diameters of conductors (1) and / or insulators (2) are alternately arranged and joined. 2. A flat cable according to claim 1, wherein said wire core (3) is made of an insulator (2) having the same diameter of the conductor (1) and two different thicknesses. 3. The wire core (3) comprises conductors (1) having the same diameter and insulators (2) having two different thicknesses, and both ends of the flat cable are provided with the thickness of the insulator (2). 2. The structure according to claim 1, wherein the first is larger.
Or the flat cable according to claim 2. 4. The insulator (2) is provided with peaks and valleys so as to have two different thicknesses and is integrally formed with a conductor (1) interposed therebetween. Item 4. The flat cable according to any one of items 1 to 3. 5. The wire core (3) is configured such that the thicker insulator (2) is assigned to the ground side and the thinner insulator (2) is assigned to the signal side and connected. The flat cable according to any one of claims 1 to 4, wherein 6. The wire core (3) is configured such that a thicker insulator (2) is assigned to a signal side and a thinner insulator (2) is assigned to a ground side. The flat cable according to any one of claims 1 to 4, wherein 7. A flat cable according to claim 1, wherein said insulator (2) is made of a conductor (1) having the same thickness and two different diameters. 8. The wire core (3) is configured such that the larger diameter of the conductor (1) is assigned to the signal side, and the smaller diameter of the conductor (1) is assigned to the ground side. Claim 7
The described flat cable. 9. The wire core (3) is configured such that the larger diameter of the conductor (1) is assigned to the ground side, and the smaller diameter of the conductor (1) is assigned to the signal side. Claim 7
The described flat cable. 10. A flat cable formed by alternately arranging and joining wire cores having different conductor diameters and / or insulator thicknesses so as to arrange a ground wire around a signal wire when folded. A method of laying a flat cable, characterized in that: