KR20230072132A - Speaker cable - Google Patents

Abstract

The present invention relates to a speaker cable. The speaker cable according to the present invention comprises a layer, which is formed from a resin in which a carbon-containing compound is included as a semiconducting layer between a conductor and an outer sheath layer (coating), and thus can efficiently remove poor sound quality and the like caused by signal distortion which can occur in a small-signal band or in a low-signal area. In addition, according to the present invention, the speaker cable comprises the semiconducting layer therein, and thus a shielding function can be supplemented and the signal transmission amount of the conductor of a core part can be also supplemented.

Description

Speaker cable {SPEAKER CABLE}

The present invention relates to speaker cables. More specifically, the present invention relates to a speaker cable that secures sound quality improvement and shielding function by preventing distortion in a minute signal band.

In general, a speaker cable is a cable connecting a speaker and other devices such as an audio amplifier, and unlike an interconnector cable, has a simple structure and is characterized by a flat shape with many strands.

Due to the feature of having many strands, the sound quality in the minute signal range or low signal range may be poor due to signal distortion or the like.

On the other hand, in the case of a speaker cable, since various cables are sometimes used together, it is necessary to have a high signal transmission amount as well as shielding performance.

Therefore, it is necessary to develop a technology for a speaker cable capable of preventing poor sound quality occurring in a speaker cable and supplementing not only shielding performance but also the amount of signal transmission of a conductor inside the cable.

Patent Document 1: Korean Utility Model Registration No. 20-0427316 (2006.09.18.)

In order to solve the problems of the prior art, the present inventors intend to provide a speaker cable capable of preventing sound quality defects occurring in a speaker cable and supplementing not only shielding performance but also the signal transmission amount of a conductor inside the cable.

In order to solve the problems mentioned above,

The present invention, a conductor; and a semiconducting layer surrounding the conductor, wherein the semiconducting layer includes a mixed resin in which a base resin and a carbon-containing compound are mixed and has a volume resistivity of 0.3Ωm to 1.0Ωm, and the mixed resin is 100 parts by weight in total. As a basis, a speaker cable containing 20 parts by weight to 40 parts by weight of a carbon-containing compound is provided.

In addition, in the present invention, the base resin is at least one selected from the group consisting of ethylene vinyl acetate (EVA), thermo-plastic elastomer (TPE), and poly-prophelene (PP) A speaker cable characterized in that it is resin is provided.

In addition, the present invention provides a speaker cable characterized in that the carbon-containing compound is carbon black or pulverized carbon fiber.

In addition, the present invention provides a speaker cable, characterized in that the pulverized carbon fiber has a diameter of 1 mm to 12 mm.

In addition, the present invention provides a speaker cable characterized in that the semiconducting layer is formed by extruding the mixed resin along the outer circumferential surface of the conductor.

In addition, the present invention provides a speaker cable characterized in that the conductor and the semiconducting layer have a diameter ratio of 1.0:1.6 to 5.0:6.4, respectively.

In addition, the present invention provides a speaker cable, characterized in that the speaker cable additionally includes a sheath layer surrounding the outside of the semiconducting layer.

The speaker cable according to the present invention includes a layer formed of a resin partially containing a carbon-containing compound as a semiconducting layer between a conductor and an outer sheath layer (covering), thereby preventing signal distortion that may occur in a minute signal band or low signal area. It is possible to efficiently remove the sound quality defects and the like according to the method.

In addition, the speaker cable according to the present invention includes a semi-conductive layer therein, so that the signal transmission amount of the conductor of the core portion can be supplemented as well as the shielding function.

The accompanying drawings are intended to explain the contents of the present invention in more detail to those skilled in the art, but the technical spirit of the present invention is not limited thereto.
1 shows a speaker cable according to an embodiment of the present invention.
2 is a diagram schematically illustrating an experimental method for evaluating an experimental example according to the present invention.
3 is a diagram showing the sound quality distribution in the 5 to 7.5 kHz region, which is a band of a typical sound source.
4 is a diagram showing the results of evaluation of whether sound quality is poor due to signal distortion among experimental examples according to the present invention.
5 is a diagram showing evaluation results for signal transmission amount in an experimental example according to the present invention.

Hereinafter, a speaker cable according to the present invention will be sequentially described in detail, but the scope of the speaker cable is not limited by the following description.

The present invention relates to speaker cables.

More specifically, the present invention relates to a speaker cable that secures sound quality improvement and shielding function by preventing distortion in a minute signal band.

The term "cable" in this specification has the same meaning as the commonly used "wire", so the terms "cable" and "wire" may indicate the same meaning, and therefore may be used interchangeably. In addition, the "speaker cable" of the present invention means to include all cables used to connect a speaker to other devices such as an amplifier or a microphone, and may include all types of circular cables or flat cables.

1 shows a speaker cable according to an embodiment of the present invention.

Referring to Figure 1, the speaker cable 10 according to the present invention, the conductor 100; and a semiconducting layer 200 surrounding the conductor 100.

The conductor 100 may have a complex twisted pair structure made by twisting a plurality of metal wires at a constant pitch, and the metal wires may be made of a single metal or an alloy of at least two metals. That is, the metal wire may be made of a metal selected from among copper, aluminum, iron, and nickel, or an alloy of these metals, but is not particularly limited thereto, and is preferably in the form of annealed wire.

The speaker cable 10 according to the present invention includes a semi-conductive layer 200 surrounding the conductor 100 in addition to the conductor 100 .

The speaker cable according to the present invention includes a semiconducting layer between a conductor and an outer sheath layer (covering), and in particular, since the semiconducting layer is a layer formed from a resin partially containing a carbon-containing compound, when applied to a speaker cable, a fine It is possible to efficiently remove sound quality defects due to signal distortion that may occur in the signal band or low signal area, and there is an effect of supplementing the shielding function as well as the signal transmission amount of the conductor of the core part.

The semiconducting layer may include a mixed resin in which a base resin and a carbon-containing compound are mixed.

The type of the base resin may include at least one resin selected from the group consisting of ethylene vinyl acetate (EVA), thermo-plastic elastomer (TPE), and poly-propylene (PP). can

The base resin may be included to increase abrasion resistance, which is a basic required physical property of the speaker cable according to the present invention, and furthermore, by selectively including the above-mentioned type of resin, the speaker cable according to the present invention is manufactured in a more environmentally friendly manner. can do.

The semiconducting layer may include a carbon-containing compound in addition to the above-described base resin.

The carbon-containing compound may be carbon black or pulverized carbon fiber.

When the carbon black is included, it is possible to basically improve the dispersion characteristics of the conductive material. In the present invention, by containing a carbon component, when a semiconducting layer formed of this material is applied to a speaker cable, it may occur in a minute signal band or low signal area. Poor sound quality due to possible signal distortion can be effectively removed.

In the case of the pulverized carbon fiber, it is not particularly limited, but may have a diameter of, for example, 1 mm to 12 mm.

In the case of including only pulverized carbon fibers having the aforementioned diameter range, the speaker cable according to the present invention has a stronger signal transmission function according to the semiconducting layer and effectively prevents microphonic distortion of electrical signals, thereby minimizing signals. It is possible to more efficiently remove sound quality defects due to signal distortion that may occur in a band or low signal area.

If necessary, the semiconducting layer may include the aforementioned carbon black or pulverized carbon fibers alone or in combination. When mixed, the semiconducting layer is not particularly limited. For example, the semiconducting layer includes the carbon black and pulverized carbon fibers. The carbon-containing compound mixed with the carbon fibers may be included in an amount of 20 parts by weight to 40 parts by weight based on 100 parts by weight of the base resin.

In one example, the semiconducting layer may additionally include a material such as carbon nanotubes in order to supplement carbon particles to a required degree, in addition to the aforementioned carbon black or pulverized carbon fibers.

When the carbon nanotubes are included in the semiconducting layer, it is not particularly limited, but preferably includes high-purity carbon nanotubes having a low content of metal ion impurities. It may be appropriately selected and included within the content range.

In one example, the method of forming the semiconducting layer may be employed without limitation as long as it is formed to surround the conductor, but preferably, a method of forming the semiconducting layer by extruding the mixed resin along the outer circumferential surface of the conductor may be employed. can In this case, since it can be manufactured with a uniform thickness and appearance, it is more suitable for realizing the effect according to the present invention.

The speaker cable according to the present invention includes a semiconducting layer as an outer covering of the conductor, thereby supplementing the shielding function as well as the signal transmission amount of the conductor in the core part. To this end, the semiconducting layer has a volume resistance of 0.3Ωm. to 1.0 Ωm.

Within the range of the volume resistance, the speaker cable according to the present invention can more efficiently remove sound quality defects due to signal distortion by more appropriately supplementing the electrical signal transmission amount of the conductor.

As described above, the semiconducting layer according to the present invention may include a mixed resin, and the mixed resin may include 20 parts by weight to 40 parts by weight of a carbon-containing compound based on 100 parts by weight of the total.

By including the mixed resin within the above-mentioned range, the speaker cable according to the present invention has basic required properties such as abrasion resistance, as well as signal distortion that may occur in a minute signal band or low signal area caused by the semiconducting layer. It is possible to simultaneously or in a balanced manner secure characteristics related to sound quality deterioration prevention.

The speaker cable according to the present invention may include the above-described conductor and semiconducting layer in an appropriate thickness in terms of electrical signal transmission, which is its original function, and in one example, the conductor and semiconducting layer have a diameter ratio of 1.0: It is preferably from 1.6 to 5.0:6.4.

When the conductor and the semiconductive layer are formed within the above diameter ratio, the speaker cable according to the present invention has more basic required properties such as abrasion resistance, and prevents signal distortion that may occur in a minute signal band or low signal area due to the semiconductive layer. There is an effect of simultaneously or in a balanced way to secure the characteristics related to the prevention of poor sound quality according to the present invention.

In one example, the speaker cable according to the present invention has an enhanced signal transmission function according to the semi-conductive layer to effectively prevent microphonic distortion of electrical signals, thereby reducing signal distortion that may occur in a minute signal band or low signal area. It is possible to more efficiently remove sound quality defects and the like according to the present invention.

In addition to the semiconducting layer, the speaker cable according to the present invention may include an insulating layer (not shown) to secure insulation, and may include an insulating layer (not shown) between the semiconducting layer and a conductor or between the semiconducting layer and a sheath layer described later, or integrally with the semiconducting layer. Ideally, an insulating layer may be included.

The insulating layer is not particularly limited, but may be formed from an insulating layer composition including, for example, a polyethylene-based resin or a polyolefin-based resin as a base resin.

In addition, if necessary, various additional components may be included in the insulating layer composition, for example, additives such as an antioxidant, a UV stabilizer, a crosslinking agent, and a crosslinking aid may be included.

The content of the additive or a combination thereof is not particularly limited, but may be included, for example, in the range of about 1 part by weight to 20 parts by weight based on 100 parts by weight of the insulating layer composition, and harmony between required physical properties. And in terms of product application, the additives may be adjusted and included within an appropriate range.

In addition, if necessary, the speaker cable according to the present invention may further include other additives in addition to the components described above.

The other additives include high molecular weight wax, low molecular weight wax, polyolefin wax, paraffin wax, paraffin oil, metal soap, organic silicone, fatty acid ester, fatty acid amide, fatty alcohol, reinforcing agent, release agent, UV absorber, stabilizer, pigment, dye , It may be one or more selected from the group consisting of a colorant, an antistatic agent, a foaming agent, and a metal deactivator.

As shown in FIG. 1 , the speaker cable 10 according to the present invention may additionally include a sheath layer 300 surrounding the outside of the semiconducting layer 200 .

The sheath layer is a layer for protecting the semiconducting layer, and the sheath layer may be formed of a composition for a cable sheath.

The composition for the cable sheath is not particularly limited, but may be, for example, a polymer resin composition alone or mixed with a base resin and other additional resins to satisfy the physical properties required for the layer forming the outermost cable. .

In addition, other additives may be included in addition to the polymer resin, and the type and mixed content of other additives may be appropriately selected and employed in consideration of required physical properties.

Hereinafter, examples will be described in detail to explain the present invention in detail. However, embodiments according to the present invention can be modified in many different forms, and the scope of the present invention is not construed as being limited to the embodiments described below. The embodiments herein are provided to more completely explain the present invention to those skilled in the art.

[Production Example]

As shown in [Table 1] below, speaker cable samples including the composition for forming the semiconducting layer for each Example and Comparative Example were manufactured.

division Example comparative example carbon layer EVA 70% by weight 0 carbon black 30% by weight 0 cis layer TPE TPE

More specifically, a compound in the form of a pellet was prepared with the ingredients and content ratios shown in [Table 1], and a semiconducting layer was extruded using the prepared compound, and a final sheath was extruded with a thermoplastic elastomer (TPE) to manufacture a speaker cable. did An annealed wire (conductor) was applied when preparing the sample, and the following evaluation was performed on the prepared sample.

[Experimental Example]

1. Evaluation of poor sound quality due to signal distortion

In order to evaluate whether or not sound quality is poor due to signal distortion for each of the speaker cables of Examples and Comparative Examples manufactured from the above Manufacturing Example, a system as shown in FIG. 2 was introduced (however, in FIG. 2, amplifiers, sound sources (LP, CDP, etc.) ) is omitted).

Referring to FIG. 2, a method for evaluating whether sound quality is poor due to signal distortion is described. After reproducing a sound source (LP or CDP), an amplifier signal is transmitted through an interconnector cable, and the transmitted signal is an audible sound through a passive speaker. indicated by At this time, the frequency of the audible range was acquired with a microphone, and the analysis was performed through an audio analyzer system. In particular, after reproducing the sound representing the frequency band, the sound quality was evaluated by dividing the low-pitched region and the high-pitched region.

For reference, the band of the sound source is usually distributed in the 5 to 7.5 kHz region (see FIG. 3). That is, the presence or absence of sound quality defects (noise) in the low signal region of 5 kHz band (5.2 kHz) belonging to the low sound side was finally evaluated by comparing the speaker cable of the comparative example and the speaker cable according to the present invention (Example).

The evaluation results are shown in FIG. 4 .

2. Evaluation of signal transmission amount

In order to evaluate the signal transmission amount for each of the speaker cables of the examples and comparative examples manufactured from the above manufacturing example, after connecting to the audio system for each of the speaker cables of the above examples and comparative examples, the sound source (Beethoven's Symphony of Destiny) ) was reproduced, and the frequency response characteristics were measured over time.

The evaluation results are shown in FIG. 5 .

[Evaluation results]

First, referring to FIG. 4, which is an evaluation of whether sound quality is poor due to signal distortion, in the case of the comparative example, it was confirmed that noise was generated in various frequency domains due to the influence of resonance in addition to the main frequency of 5.2 kHz, and in the case of the embodiment of the present invention, In the 5.2kHz band, other frequencies other than the main frequency waveform were hardly detected. This is analyzed as a phenomenon in which vibration is absorbed by the carbon layer, and it can be seen that this indicates that the microphonic phenomenon is reduced and the sound quality in the low signal area can be improved.

In addition, referring to FIG. 5, which is an evaluation of the signal transmission amount, in the embodiment, the overall signal level increased (dB increase) according to the increase in the signal transmission amount due to the conductivity of the carbon layer, which can be seen as increasing the expressive power expressing the sense of volume. can

As can be seen in FIGS. 4 and 5, the speaker cable according to the present invention includes a layer formed from a resin partially containing a carbon-containing compound as a semiconducting layer between the conductor and the outer sheath layer (covering), thereby providing a fine signal It is possible to efficiently remove sound quality defects due to signal distortion that may occur in the band or low-signal area, and there is an effect of supplementing the shielding function as well as the signal transmission amount of the conductor of the core part.

The above description of the present application is for illustrative purposes, and those skilled in the art will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present application.

10: speaker cable
100: conductor
200: semiconducting layer
300: cis layer

Claims (7)

conductor; and
Including; a semiconducting layer surrounding the conductor,
The semiconducting layer includes a mixed resin in which a base resin and a carbon-containing compound are mixed, and has a volume resistance of 0.3 Ωm to 1.0 Ωm,
The mixed resin, based on 100 parts by weight of the total, 20 parts by weight to 40 parts by weight of a carbon-containing compound, the speaker cable.
The method of claim 1, wherein the base resin is at least one selected from the group consisting of ethylene vinyl acetate (EVA), thermo-plastic elastomer (TPE), and poly-prophelene (PP). A speaker cable characterized in that it is resin.
The speaker cable according to claim 1, wherein the carbon-containing compound is carbon black or pulverized carbon fiber.
The speaker cable according to claim 3, characterized in that the pulverized carbon fiber has a diameter of 1 mm to 12 mm.
The speaker cable according to claim 1, wherein the semiconducting layer is formed by extruding the mixed resin along an outer circumferential surface of the conductor.
The speaker cable according to claim 1, characterized in that the conductor and semi-conductive layer have a diameter ratio of 1.0:1.6 to 5.0:6.4, respectively.
The speaker cable according to claim 1, wherein the speaker cable further comprises a sheath layer surrounding an outside of the semiconducting layer.

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