JPH07302517A - Wiring cable - Google Patents

Abstract

PURPOSE:To solve a sound unbalance right and left, improve the timing strain between a high frequency part and a low frequency part, and lessen the information loss and energy loss in the case a wiring cable is used for a sound system, etc. CONSTITUTION:Two cables are paired to be used. In the paired wiring cables, one cable is a leftwards stranded cable 11 manufactured by stranding metal core wires 14 spirally leftwards. The other cable is a rightwards stranded cable 21 manufactured by stranding metal core wires 24 spirally rightwards.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a stereo audio device,
Wiring for electrical products such as televisions and radios, telecommunications equipment or facilities such as telephones, and other transmission equipment or facilities,
A wiring cable that can be used as an electric wire, etc. to obtain a natural reproduced sound with a sound image spreading to the left and right in stereo audio equipment, etc., and to reduce distortion in a telephone cable, electric wire, etc., for efficient electric transmission .

[0002]

2. Description of the Related Art Conventionally, the wiring cable shown in FIG.
Cables 51, 61, 7 as shown in FIGS.
First grade is known. The cable 51 shown in FIG.
The core wire 53 is a single core made of left-handed spiral metal wires 54 and 55, while the core wires 63 and 73 of the cables 61 and 71 shown in FIGS.
The covered metal wires 64, 65 or 74, 75 are two cores in a leftward spiral shape. Reference numeral 56,
66 is a shield layer, and 57, 67 and 77 are covering covers. Each of these cables 51, 61, 71 is used as a set of two cables as a connecting cord for stereo audio equipment or the like, or as a single cable for various purposes.

However, the cables 51, 6 as described above
When two sets of 1 and 71 are used for a connection cord of a stereo audio device, for example, the reproduced sound uses a cable with the same structure on the left and right, so that the left and right sound images have no natural feeling and sound localization, The contour of the sound is unclear, the high and low tones are lacking in sharpness, and the balance of the left and right sound images becomes unbalanced.
So, in the past, we tried to eliminate the above imbalance by connecting a balancer, an equalizer, etc. to the amplifier, and orienting the speaker extremely inward. Has reached.

Furthermore, the conventional cable has a problem of time delay distortion as a fatal problem of the wiring cable not only when it is used as a set of two cables but also when it is used as one cable. This time delay distortion occurs as follows. That is, when a current flows through a conductor, a magnetic field is generated, the magnetic fields are entangled in a complicated manner, and as a result, a stronger inductance (a force that tries to hinder the current flow) is generated in the central part of the conductor, and the peripheral part A weaker inductance is generated, and the higher the frequency, the more the influence of the inductance tends to flow on the surface of the conductor (skin effect). As a result, the higher the frequency, the faster the transmission, and the lower the frequency, the slower the transmission.
Therefore, it has been conventionally demanded to further reduce the temporal distortion of the high frequency portion and the low frequency portion and the information loss during use.

[0005]

DISCLOSURE OF THE INVENTION The present invention, when used in audio equipment and the like, eliminates the above-mentioned imbalance of left and right sounds, unclear sound contours, etc. It is an object of the present invention to provide a wiring cable that can reduce the time distortion with the portion and the information loss.

[0006]

That is, there are two inventions, and the first invention is a wiring cable in which two cables are used as one set, and one of the cables has a metal core wire facing left. It is characterized in that it is composed of a spirally twisted cable from the left, and the other cable is made of a spirally spiraled rightward cable from the right.

The cables from the left and the cables from the right are provided with a shield layer on the outer circumference of each metal core wire, and one or a plurality of outer windings having the same direction as the metal core wire of each cable are provided on the outer circumference of the shield layer. It is preferably wrapped. It is more preferable to further provide a shield layer on the outer circumference of the outer winding.

A second aspect of the present invention relates to a wiring cable which is used not only in a pair of wires but also in a single wire, and which includes a cable having a shield layer on the outer circumference of a metal core wire in a left-handed spiral shape or a right-handed spiral shape. In the above wiring cable, one or a plurality of spirally wound outer winding wires are wound around the shield layer in the same direction as the metal core wire. It is more preferable to further provide a shield layer on the outer circumference of the outer winding. When the wiring cables of the second invention are used in pairs, the metal core wires and the outer winding wires may be in the same direction, for example, from the left side or from the right side.

The term "left-handed spiral" in the present invention refers to a state in which the metal core wire or the like turns counterclockwise toward the other end of the wiring cable when the wiring cable is viewed from one end. The phrase "right-handed spiral" is
When the wiring cable is viewed from one end on the same side as the above, it means a state in which the metal core wire or the like is turning clockwise toward the other end of the wiring cable.

[0010]

With respect to the wiring cable of the first aspect of the present invention, when either the cable from the left or the cable from the right is used as the left connection cord of the audio equipment and the other is used as the right connection cord, no reproduced sound is produced. The left and right sound images had a natural expanse, the localization of the sound and the contour of the sound were clear, and the highs and lows were sharp, and the left and right sound images were well balanced.

On the other hand, the conventional wiring cable shown in FIGS. 11 to 13, that is, the left connecting cord and the right connecting cord both having the same structure, is used as the connecting cord of the same audio equipment as described above. However, compared with the case of using the above-mentioned invention product, the sense of expanse of the left and right sound images is unnatural, the localization of the sound and the contour of the sound are unclear, the high and low tones are lacking in sharpness, and the left and right sound images are not well balanced. It was in balance.

Further, when the conventional wiring cables shown in FIG. 11 are used as a set of two cables, an impedance / gain-face analyzer (manufactured by Hewlett-Packard Company, Model 4) is used at Gifu Industrial Technology Center.
194A), the phase shift of the left and right wiring cables was investigated in the range of 100 Hz to 100000 Hz. It was found that there was no phase shift as shown in FIG. In FIG. 8, the vertical axis represents the phase angle and the horizontal axis represents the frequency. Note that FIG.
Similarly, when the conventional wiring cables shown in FIGS. 2 and 13 were also examined, there was no phase shift between the left and right.

On the other hand, with respect to the wiring cable of the first invention, the phase of the cable from the left and the cable from the right were examined in the same manner as described above. There was a gap. FIG. 9 shows an example of the measurement result. The wiring cable whose measurement results are shown in FIG. 9 has the structure shown in FIG. 7, and the wiring cable and the metal core wire are wired from the left by spiraling to the left and from the right by spiraling to the right. It consists of a cable. This wiring cable is shown in Figure 9.
As is clear from 0.2 to 360 between the wiring cable from the left and the wiring cable from the right, at almost all frequencies.
There is a phase shift of about 0.3 / 360 degrees.

The measurement results shown in FIG. 10 relate to another embodiment of the first invention, in which a shield layer is provided on the outer circumference of the metal core wire, and the shield is provided on the outer circumference thereof in the same direction as the metal core wire of each cable. The present invention relates to the wiring cable shown in FIG. 1, which has a structure in which a coil-shaped outer winding is wound. For this wiring cable, at almost all frequencies, the wiring cable from the left and the wiring cable from the right to 0.
There was a phase shift of 2/360 to 0.3 / 360 degrees.
The phase at 3846.250 Hz is -494.647 mdeg for the wiring cable from the right and -711.642 mdeg for the wiring cable from the left, which is about 0.22 / 3.
There is a 60 degree phase shift.

Due to the left-right phase shift at all frequencies, when the first invention product is used as a connection cord for left and right speakers, etc., there is no interference due to the left and right phase overlap, whereby the left speaker The playback sound from and the playback sound from the right speaker become clear respectively, and the playback sound has a natural feeling with a spread of the sound image on the left and right, and the localization of the sound and the contour of the sound are sharp, making it a high and low tone. It is considered that sharpness is generated and the left and right sound images can be balanced. Further, if the outer winding is provided, the time delay can be improved as described later, and the effect is further enhanced.

On the contrary, the conventional wiring cables interfere with each other because the left and right phases are the same, and the reproduced sound from one speaker interferes with the reproduced sound from the other speaker, resulting in a left and right sound image. It is considered that there were problems such as reduction of the spread of the sound, localization of the sound, and obscuring the outline of the sound.

Further, the wiring cable of the second invention, that is, a shield layer is provided on the outer periphery of the metal core wire formed by the left-handed spiral shape or the right-handed spiral shape, and the outer periphery of the shield layer has the same spiral shape as the metal core wire. Regarding one in which one or more windings are wound (corresponding to a cable from the left or a cable from the right of the first invention shown in FIG. 1), one in which the metal core wire and the outer winding are spirals facing left When used as a pair or as a pair of right-handed spirals as a connecting cord for speakers, in this case also, the reproduced sound becomes clearer and the sound image spreads left and right compared to the case where a conventional wiring cable is used. The sound has a natural feel, and the sound localization and the contour of the sound are crisp, which creates sharp contrast in the highs and lows, and balances the left and right sound images. Was Tsu.

The measurement results of the phase for this wiring cable are the same as those in FIG. 10, and the phase of the cable from the left of the figure and the phase of the conventional wiring cable having no outer winding (see FIG. 8).
It is understood that the second invention has a smaller difference in transmission speed between the high frequency part and the low frequency part as compared with the conventional wiring cable. This is due to the outer winding in the second invention. It is considered that the speed of the high-frequency portion becomes slower than that of the conventional one, so that the temporal distortion between the high-frequency portion and the low-frequency portion, which has been a problem in the past, is improved, and the effect of improving the reproduced sound is obtained. In addition, by eliminating the temporal distortion of the high-frequency part and the low-frequency part, conventionally, when transmitting a long distance like a telephone line, a relay station is provided at regular intervals to set the time between the high-frequency part and the low-frequency part. It was necessary to eliminate the distortion, but it is also possible to reduce the number of relay stations.

Since the outer winding is provided,
It is presumed that this outer winding acts as a coil to suppress the above-mentioned high-frequency transmission speed and improve the temporal distortion of high and low frequencies. The reason is considered as follows.
That is, when an AC current flows through the outer winding (coil), a change in magnetic flux occurs, an electromotive force is generated to prevent the change in magnetic flux, the change in AC current is suppressed, and this is the same as when a resistance is encountered. . And since the electromotive force is proportional to the rate of magnetic flux change, the higher the frequency, the larger the resistance,
It is speculated that reactance occurs (Lenz's law), which suppresses the transmission speed in the high-frequency part.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. 1 is a perspective view of a wiring cable according to an embodiment of the first invention, FIG. 2 is a perspective view of a cable from the right according to another embodiment, and FIG. 3 is a side view of a wiring cable end portion according to another embodiment. FIG. 4 is a side view of a wiring cable end according to yet another embodiment, FIG. 5 is a side view of a wiring cable end according to yet another embodiment, and FIG. 6 is a wiring cable end according to yet another embodiment. FIG. 7 is a side view of a portion of a wiring cable according to another embodiment.

The wiring cable 10 of the first invention shown in FIG.
Is used as a speaker connecting cord, a microphone connecting cord, an amplifier power cord, a transmission cable such as a telephone line, and the like, and includes a cable 11 from the left and a cable 21 from the right.

From the left, the cable 11 has a metal core wire 1 in which two covered metal wires 12 and 13 are spirally directed to the left.
4 and a shield layer 1 coated on the outer periphery of the metal core wire 14
5 and an outer winding 1 wound around the shield layer 15 in the same spiral direction as the metal core 14 in the leftward direction.
6 and a cover 17 made of resin or the like for covering them.

As the shield layer 15, there is used one which is reticulated by a metal wire as in this embodiment, a metal foil such as an aluminum foil, or a laminate of the reticulated material and a metal foil. On the outer circumference of the shield layer 15, an outer winding 16 having the same leftward spiral shape as the metal core wire 14 is wound. Both ends of the outer winding 16 are connected to the shield layer 15 and usually one of the metal wires 12 and 13 is used.

On the other hand, the cable 21 from the right has a metal core wire 24 formed by spirally covering the two covered metal wires 22 and 23 to the right, a shield layer 25 coated on the outer periphery of the metal core wire 24, and further. An outer winding wire 26 wound in the same rightward spiral shape as the metal core wire 24 around the outer periphery of the shield layer 25, and a cover 27 made of resin or the like for covering them.
Composed of and.

In this embodiment, the metal core wires 14 and 24 and the outer winding wires 16 and 26 of each cable are made of a single metal wire, but a twisted wire of a plurality of metal wires may be used instead of the single metal wire. Good. In that case, it is preferable that the twisted line has a left-handed spiral for the cable from the left and a right-handed spiral for the cable from the right. Further, in this embodiment, the two-core type is shown, but a multi-core type or a single-core type having more than that may be used. Alternatively, the core may be made of two or more cores and used independently without connecting the cores at both ends, or the cores may be composed of a plurality of cores of two or more cores. Although the outer windings 16 and 26 in this embodiment consist of one piece, it is preferable to wind a plurality of pieces. Further, the outer windings 16 and 26 may have two or more layers. When the outer windings have two or more layers, a shield layer may or may not be provided between the layers.

FIG. 2 shows a cable 30 from the right of the wiring cable according to another embodiment of the present invention. In this cable 30 from the right, a shield layer 35 is provided on the outer periphery of a metal core wire 34 having a rightward spiral shape.
An outer winding wire 36 is wound around the outer periphery of the metal core wire 34 in a rightward spiral shape in the same direction as the metal core wire 34, and a shield layer 37 is provided on the outer periphery of the outer winding wire 36. Reference numeral 38 is a covering code. Although the cable is not shown from the left, the metal core wire and the outer winding wire are in a spiral shape facing left.

Further, in this embodiment, the numbers of the metal core wire 34 and the outer winding wire 36 increase from the middle. That is, the number of the metal core wires 34 is 2 to 3, and the number of the outer winding wires 36 is 4 to 5. Thereby, the electric resistance can be further reduced. Of course, the number is not limited to the above number.

In the embodiment of the first aspect of the invention, the outer windings 16, 26, 36 are provided so as to obtain a better effect. However, depending on the class of the audio equipment, the outer windings may not be provided. is there. Furthermore, the shield layers 15, 25,
35 and 37 may or may not be provided.

3 to 7 show still another embodiment of the first invention. The wiring cable 40 of FIG. 3 is composed of a cable 41 from the left and a cable 42 from the right of the one-core type, and each of the metal core wires comprises a metal wire.
In the wiring cable 43, the cable 41 from the left and the cable 42 from the right are arranged in parallel by one covering cover. The wiring cable 44 of FIG. 5 is a two-core cable of the wiring cable shown in FIG. 3, where 45 is a cable from the left and 46 is a cable from the right. The wiring cable 47 of FIG. 6 has a shield layer S in addition to the wiring cable 44 of FIG.
Is provided. In addition, the wiring cable 48 of FIG.
Is the wiring cable 10 shown in FIG. 1 from which the shield layers 15 and 25 and the outer windings 16 and 26 are removed.
A is a cable from the left, and 49b is a cable from the right.

Next, an embodiment of the second invention will be described.
The wiring cable of the second invention is provided with a shield layer on the outer periphery of the metal core wire according to the left spiral or the right spiral,
The shield layer has a structure in which one or more spiral outer windings are wound around the outer periphery of the metal core wire, or a shield layer is further provided on the outer periphery of the outer winding. Examples may include a cable 11 from the left as shown, a cable 21 from the right, or a cable 30 from the right as shown in FIG.

The metal core wire and the outer winding wire may each be a single metal wire or a twisted wire of a plurality of metal wires.
Further, for the metal core wire, a multi-core type with two or more cores or a one-core type is used.In the case of two or more cores, each core is used independently without connecting at both ends, or with two or more cores. Similar to the case of the first invention, the metal core wire may be constituted by a plurality of sets of one set. Also, it is preferable to wind a plurality of outer winding wires, or if the outer winding wire has two or more layers, or if the outer winding wire has two or more layers, a shield layer may or may not be provided between the layers. Is the same as the first invention.

The wiring cables 11 (cables from the left), 21 (cables from the right) and 30 (cables from the right) shown as the embodiment of the second invention are each one as appropriate according to the application. Alternatively, cables having the same structure may be used as one set, or cables having different spiral directions (twisted directions) may be used as one set.

[0033]

As shown and described above, if the wiring cable of the present invention is used as a speaker cord of a stereo audio device or a connection cord inside a speaker, the left and right sound fields are balanced, You can obtain a wonderful reproduced sound that could not be achieved in the past, such as increasing the spread of the sound image, clearing the outline of the sound, and improving the sharpness of the high and low tones. Further, in the case where the shield layer and the outer winding thereof are provided with outer windings, or in the case where the outer winding is provided with a shield layer, not only the reproduced sound can be improved but also a conventional problem. Also, there is an effect that information loss and energy loss can be reduced by improving temporal distortion between the high frequency portion and the low frequency portion.

Therefore, the wiring cable of the present invention is not limited to wiring of audio equipment such as microphone cords, speaker cords, power cords of amplifiers, circuits inside amplifiers, etc., but is extremely useful as cables for communication equipment and various other electric transmissions. Is. Moreover, since this wiring cord has a simple structure and does not use complicated equipment, it is extremely useful.

[Brief description of drawings]

FIG. 1 is a perspective view of a wiring cable according to an embodiment of the first invention.

FIG. 2 is a perspective view of a cable from the right according to another embodiment.

FIG. 3 is a side view of an end portion of a distribution cable according to another embodiment.

FIG. 4 is a side view of an end portion of a distribution cable according to still another embodiment.

FIG. 5 is a side view of an end portion of a distribution cable according to still another embodiment.

FIG. 6 is a side view of an end portion of a distribution cable according to still another embodiment.

FIG. 7 is a side view of a wiring cable end portion according to still another embodiment.

FIG. 8 is a diagram showing a result of phase measurement of a conventional product.

FIG. 9 is a diagram showing a phase measurement result of a wiring cable according to an embodiment of the present invention.

FIG. 10 is a diagram showing a phase measurement result of a wiring cable according to another embodiment of the present invention.

FIG. 11 is a perspective view of a conventional product.

FIG. 12 is a perspective view of another conventional product.

FIG. 13 is a perspective view of still another conventional product.

[Explanation of symbols]

 11: Cable from the left 14, 24: Metal core wire 15, 25: Shield layer 16, 26: Outer winding 21: Cable from the right

Claims (5)

[Claims] 1. A wiring cable in which two cables are used as one set, one of the cables is a left-handed cable having a metal core wire in a spiral shape facing left, and the other cable is a metal core wire facing right. Wiring cable characterized by consisting of a cable from the right according to the spiral shape. 2. The shield layer is provided on the outer circumference of the metal core wire of each of the cable from the left and the cable from the right, and an outer winding wire in the same direction as the metal core wire of each cable is provided on the outer circumference of the shield layer. Wiring cable characterized by winding a book or multiple pieces. 3. The wiring cable according to claim 2, wherein a shield layer is provided on the outer circumference of the outer winding. 4. A wiring cable comprising a cable having a shield layer on the outer circumference of a metal core wire having a left-handed spiral shape or a right-handed spiral shape, wherein an outer winding wire having the same spiral direction as the metal core wire is provided on the outer circumference of the shield layer. Wiring cable characterized by winding a book or multiple pieces. 5. The wiring cable according to claim 4, wherein a shield layer is provided on the outer circumference of the outer winding.