An audio connection cable

Abstract

The present invention discloses an audio cable, comprising a cable body, wherein a conductor is inserted into the cable body, the cable body comprising an inner support body and an outer sheath, a shielding layer being provided between the inner support body and the outer sheath, the inner support body comprising an outer support ring, a central support column, and a plurality of connecting portions, the outer support ring extending inward to form a connecting portion, the inner side of the connecting portion being connected to the central support column, a cavity being formed within the outer support ring, the area of ​​the cavity accounting for 30% to 70% of the cross-section of the inner support body, the connecting portion being provided with a plurality of threading holes for accommodating the conductors, the distances from the centers of at least two of the threading holes to the shielding layer being different, and the conductors being selectively inserted into one or more of the threading holes. The advantages of the cable are: a simple and reasonable structure, utilizing the air in the cavity for insulation and support, reducing the skin effect, reducing the extrusion of the conductors, and improving the service life.

Description

Technical Field

[0001] The invention relates to the technical field of signal connection line manufacturing, in particular to an audio connection line. Background Art

[0002] Audio cables are used to transmit sound signals between playback devices and speakers or headphones. When high-current AC current passes through a cable, it's prone to skin effect. This refers to the uneven distribution of current within a conductor, or an alternating electromagnetic field. The current is concentrated in the conductor's "skin," a thin layer on the outside of the conductor. Current density increases closer to the surface, while the actual current inside the conductor decreases. This increases the conductor's resistance and power loss. In audio cables, the skin effect can affect sound fidelity and, consequently, listening experience.

[0003] For example, the patent application with application number CN201821143363.0 and named "An Audio Cable" discloses an audio cable, including a cable body and four groups of wire groups, the cable body has a circular shape; each group of wire groups is provided with two wires and a wire group sheath, the wire group sheath has a circular shape; the wires are provided with conductors and a wire sheath; the four groups of wire groups are inside the cable body, and the four groups of wire groups are symmetrical around the internal center of the wire body. It arranges wire groups inside the audio cable, and each wire group is further provided with wires, and adopts a multi-layer sheath structure to reduce the skin effect. However, during the use of the audio cable, the position of each wire is movable, which will affect the stability of audio transmission and thus affect the listening effect; in addition, the existing audio cables mostly pursue multi-channel transmission, so their structure needs to be further improved. Summary of the Invention

[0004] The purpose of the present invention is to make up for the above-mentioned deficiencies and to disclose to the public an audio connection cable which has a simple and reasonable structure, strong pressure resistance, can reduce the skin effect and improve the sound quality.

[0005] The technical solution of the present invention is achieved as follows:

[0006] An audio connection cable comprises a connection cable body, wherein a conductor is inserted into the connection cable body, the connection cable body comprises an inner support body and an outer wrapping layer, a shielding layer is provided between the inner support body and the outer wrapping layer, the inner support body comprises an outer support ring, a central support column and a plurality of connecting parts, the outer support ring extends inwardly to form a connecting part, the inner side of the connecting part is connected to the central support column, a cavity is formed in the outer support ring, in the cross section of the inner support body, the area of ​​the cavity accounts for 30%-70% of the cross-sectional area, a plurality of threading holes for accommodating the conductors are provided on the connection part, the distance from the center of at least two of the threading holes to the shielding layer is different, and the conductor can be selectively inserted into one or more of the threading holes.

[0007] The measures to further optimize this technical solution are:

[0008] As an improvement, the center of the central support column is provided with a concentric hole. In the same cross-section, the center of the concentric hole is concentric with the center of the inner support body or the center of the circumscribed circle of the inner support body. By utilizing the concentric hole, if a conductor is passed through the concentric hole, the conductor and the shielding layer can form a coaxial structure, thereby forming a coaxial line, which has strong anti-interference capabilities.

[0009] As an improvement, the outer periphery of the cross section of the outer support ring is a circular structure, and the outer support ring and the central support column are evenly provided with three connecting parts.

[0010] As an improvement, the outer periphery of the cross section of the outer support ring is a rounded triangle structure, and the outer support ring and the central support column are evenly provided with three connecting parts, and the three connecting parts are correspondingly connected to the three sides of the rounded triangle structure.

[0011] As an improvement, the outer periphery of the cross section of the outer support ring is a regular hexagonal structure, and the outer support ring and the central support column are evenly provided with three connecting parts, and the three connecting parts are correspondingly connected to the sides of the regular hexagonal structure.

[0012] The outer circumference of the cross section of the outer support ring can be a circle, a rounded triangle, a regular hexagon or any other geometric shape. The uniformly arranged connection parts can ensure the spacing between the threading holes and the proportion of the cavity.

[0013] As an improvement, each connecting portion is provided with a first threading hole and a second threading hole in sequence from the inside to the outside in a radial direction, and the threading holes on the connecting portion are arranged in concentric circles. This arrangement can make the structure of the inner support body regular and facilitate processing.

[0014] As an improvement, the distances from the center of the concentric holes to the center of the first threading hole, the distance from the center of the first threading hole to the center of the second threading hole, and the distance from the center of the second threading hole to the shielding layer are all different. These three distances are different, and by selecting the wire insertion positions, a variety of wire spacings can be developed.

[0015] As an improvement, the shielding layer is made of conductive material by weaving, winding or extrusion.

[0016] As an improvement, the outer wrapping layer is wrapped with a shock-absorbing layer, which has a certain shock-absorbing and vibration-absorbing effect, thereby protecting the audio cable in the shock-absorbing layer.

[0017] As an improvement, the shock-absorbing layer is wrapped with a wear-resistant layer. The wrapping of the outer wear-resistant layer can improve the wear resistance, facilitate the printing of the logo, and increase the service life of the audio connection cable.

[0018] The advantages of the present invention compared with the prior art are:

[0019] The audio connection line of the present invention has a simple and reasonable structure. It is provided with an inner support body, and a cavity is provided on the inner support body. The air in the cavity is used to form insulation and shock absorption effects, which can reduce the skin effect and the extrusion of the wires, thereby increasing the service life. The area of ​​the cavity accounts for 30%-70% of the cross-sectional area, which not only ensures the proportion of the cavity and the insulation, but also forms sufficient support and ensures pressure resistance. In addition, a number of threading holes are provided on the inner support body, wherein at least two threading holes have different distances from their centers to the shielding layer. By selecting and using different threading holes, the distance between the wires can be adjusted, and the distance between the wires and the shielding layer can also be adjusted. By adjusting the distance, the capacitance and reactance can be adjusted, and then the insulation coefficient can be adjusted. The loss of high-frequency, medium-frequency and low-frequency signals transmitted by the wire is reduced as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural diagram of embodiment 1 of the present invention;

[0021] Figure 2 This is a front view of the first embodiment of the present invention;

[0022] Figure 3 yes Figure 2 Schematic diagram of the structure of the inner support body;

[0023] Figure 4 This is a schematic structural diagram of the inner support body of the second embodiment of the present invention;

[0024] Figure 5 It is a schematic structural diagram of the inner support body of embodiment 3 of the present invention.

[0025] The names of the reference numerals in the accompanying drawings of the present invention are:

[0026] Wire 1, inner support body 2, cavity 2a, first threading hole 2b, second threading hole 2c, outer support ring 21, central support column 22, concentric hole 22a, connecting part 23, outer wrapping layer 3, shielding layer 4, shock-absorbing layer 5. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings:

[0028] Example 1, as Figures 1 to 3 As shown, an audio connection cable includes a connection cable body, a conductor 1 is inserted into the connection cable body, the connection cable body includes an inner support body 2 and an outer wrapping layer 3, a shielding layer 4 is arranged between the inner support body 2 and the outer wrapping layer 3, the inner support body 2 includes an outer support ring 21, a central support column 22 and a plurality of connecting parts 23, the outer support ring 21 extends inward to form a connecting part 23, the inner side of the connecting part 23 is connected to the central support column 22, a cavity 2a is formed in the outer support ring 21, and in the cross section of the inner support body 2, the area of ​​the cavity 2a accounts for 30%-70% of the cross-sectional area, and a plurality of threading holes for accommodating the conductor 1 are provided on the connection part 23, and the distances from the centers of at least two of the threading holes to the shielding layer 4 are different, and the conductor 1 can be selectively inserted into one or several of the threading holes.

[0029] The inner support body 2 and the outer wrapping layer 3 are made of plastic material. In this embodiment, the outer wrapping layer 3 is transparent, and the area of ​​the cavity 2a accounts for 58.5% of the cross-sectional area.

[0030] The center of the central support column 22 is provided with a concentric hole 22a. In the same cross section, the center of the concentric hole 22a is concentric with the center of the inner support body 2 or the center of the circumcircle of the inner support body 2. A conductor can be optionally arranged in the concentric hole 22a. In this way, the conductor in the concentric hole 22a and the shielding layer 4 can form a coaxial line, which has strong anti-interference capabilities.

[0031] The outer periphery of the cross section of the outer support ring 21 is a circular structure, and the outer support ring 21 and the central support column 22 are evenly provided with three connecting parts 23.

[0032] A first threading hole 2b and a second threading hole 2c are sequentially provided on each connecting portion 23 in radial direction from the inside to the outside. The threading holes on the connecting portion 23 are arranged in concentric circles.

[0033] The distance from the center of the concentric hole 22a to the center of the first threading hole 2b, the distance from the center of the first threading hole 2b to the center of the second threading hole 2c, and the distance from the center of the second threading hole 2c to the shielding layer 4 are different.

[0034] The shielding layer 4 is formed by weaving, winding or extruding a conductive material.

[0035] In this embodiment, the shielding layer 4 is formed by cross-weaving copper wire tapes, and the copper wire tapes are formed by multiple strands of copper wires arranged in parallel.

[0036] The copper wire strip includes warp and weft, and the warp and weft are both arranged at an angle of 45 degrees to the axis of the audio connection line.

[0037] Multiple strands of copper wire are arranged in parallel to form a copper tape, where the thickness of the tape is the same as the diameter of the copper wire. These tapes are then cross-woven to form the shielding layer 4. This reduces the thickness of the shielding layer 4, thereby reducing the overall cross-sectional area of ​​the audio cable. If copper tapes parallel to the audio cable axis and copper tapes perpendicular to the axis are used for weaving, the copper wires in the copper tape perpendicular to the axis of the audio cable will easily detach at the ends of the shielding layer 4, causing the shielding layer 4 to become loose. However, weaving with warp and weft threads arranged at a 45° angle ensures the stability of the shielding structure.

[0038] The shielding layer 4 can also be formed by winding a conductive material or by extrusion molding, which can also achieve a shielding effect.

[0039] The outer wrapping layer 3 is wrapped with a shock-absorbing layer 5. The shock-absorbing layer 5 has a certain shock-absorbing and shock-absorbing effect, thereby protecting the audio line in the shock-absorbing layer 5.

[0040] The shock-absorbing layer 5 is wrapped with a wear-resistant layer 6, which is a rubber layer. The wear-resistant layer 6 is wrapped around the outside of the audio connecting cable, which can improve the wear resistance of the surface and increase the service life of the audio connecting cable. The setting of the wear-resistant layer 6 also facilitates the spraying and printing of logos.

[0041] The audio cable of the present invention sets the shielding layer 4 between the inner support body 2 and the outer wrapping layer 3, which can effectively fix the shielding layer 4. The inner support body 2 includes an outer support ring 21, a central support column 22 and a plurality of connecting parts 23. The outer support ring 21 extends inward to form the connecting part 23. The inner side of the connecting part 23 is connected to the central support column 22. The central support column 22 is supported by the connecting part 23, which can ensure the overall stability of the inner support body 2 and make the audio cable have good pressure resistance. A cavity 2a is formed in the inner support body 2. The cavity 2a is filled with air. When the wire 1 is placed in the inner support body 2, it can be insulated by air, thereby improving the insulation performance and reducing transmission loss and skin effect. The area of ​​the cavity 2a accounts for 30%-70% of the cross-sectional area of ​​the inner support body 2, which not only ensures the proportion of the cavity 2a and the insulation, but also forms sufficient support force to ensure pressure resistance. In addition, since the audio connection cable is a long strip structure, the air pressure generated by the air in the cavity 2a can form a supporting effect in a local range, further improving the pressure resistance of the audio connection cable.

[0042] The connection portion 23 has threading holes, wherein at least two threading holes have different distances from their centers to the shielding layer 4. In this embodiment, a total of 6 threading holes are provided. A first threading hole 2b and a second threading hole 2c are sequentially provided on each connection portion 23 in the radial direction from the inside to the outside. The threading holes on the connection portion 23 are arranged in concentric circles, such as Figure 3 As shown, the distance from the center of the concentric hole 22a to the center of the first threading hole 2b is denoted as H1, the distance from the center of the first threading hole 2b to the center of the second threading hole 2c is denoted as H2, and the distance from the center of the second threading hole 2c to the shielding layer 4 is denoted as H3, where H1≠H2≠H3; in addition, the distance between the centers of adjacent first threading holes 2b is denoted as H4, and the distance between the centers of adjacent second threading holes 2c is denoted as H5, where H1≠H2≠H3≠H4≠H5 is satisfied. The distance from the center of the second threading hole 2c to the shielding layer 4 is H3, and the distance from the center of the first threading hole 2b to the shielding layer 4 is H3+H2. Obviously, the distances from the center of the first threading hole 2b and the center of the second threading hole 2c to the shielding layer 4 are different, as shown in FIG. Figure 1As shown, in this embodiment, two wires 1 are provided in the outer rings of the two concentric circles, and one wire 1 is provided in the inner rings of the two concentric circles, that is, wires 1 are provided in two second threading holes 2c and one first threading hole 2b. When preparing the audio connection line, the threading holes can be selected as needed to pass the wires 1. The distance between the wires 1 and the distance between the wires 1 and the shielding layer 4 can be adjusted by selecting different threading holes. The capacitance and reactance can be adjusted by adjusting the distance, and then the insulation coefficient can be adjusted. Since H1≠H2≠H3≠H4≠H5, a variety of wire spacings can be obtained through permutations and combinations to meet the selection requirements. In addition, there are 6 threading holes plus the central concentric hole 22a, and there are a total of 7 positions on the inner support body 2 that can be used to pass wires. The number of wires can be passed according to the number of channels, thereby forming a multi-channel audio connection line.

[0043] Example 2, as Figure 4 As shown, the audio connection line structure is similar to the audio connection line structure in Example 1, except that, in this embodiment, the outer periphery of the cross-section of the outer support ring 21 is a rounded triangle structure, and the outer support ring 21 and the central support column 22 are evenly provided with three connecting parts 23, and the three connecting parts 23 are correspondingly connected to the three sides of the rounded triangle structure.

[0044] Example 3, as Figure 5 As shown, the audio connection line structure is similar to the audio connection line structure in Example 1, except that, in this embodiment, the outer periphery of the cross-section of the outer support ring 21 is a regular hexagonal structure, and the outer support ring 21 and the central support column 22 are evenly provided with three connecting parts 23, and the three connecting parts 23 are connected to the edges of the regular hexagonal structure.

[0045] In the second and third embodiments, the distance between the wires 1 or the distance between the wires 1 and the shielding layer 4 can also be adjusted by selecting the position of the wires 1. By adjusting the distance, the capacitance and reactance can be adjusted, and the insulation coefficient can be adjusted. Of course, the cross section of the inner support body 2 can also adopt other geometric shapes.

[0046] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. An audio cable, comprising a cable body, wherein a conductor (1) is inserted into the cable body, and wherein: The connecting wire body comprises an inner support body (2) and an outer wrapping layer (3), a shielding layer (4) is provided between the inner support body (2) and the outer wrapping layer (3), the inner support body (2) comprises an outer support ring (21), a central support column (22) and a plurality of connecting parts (23), the outer support ring (21) extends inward to form a connecting part (23), the inner side of the connecting part (23) is connected to the central support column (22), a cavity (2a) is formed in the outer support ring (21), in the cross section of the inner support body (2), the area of ​​the cavity (2a) accounts for 30%-70% of the cross section area, the center of the central support column (22) is provided with a concentric hole (22a), in the same cross section The center of the concentric hole (22a) is concentric with the center of the inner support body (2) or the center of the circumscribed circle of the inner support body (2), and a first threading hole (2b) and a second threading hole (2c) are sequentially arranged on each connecting portion (23) along the radial direction from the inside to the outside. The threading holes on the connecting portion (23) are arranged in concentric circles, and the distance from the center of the concentric hole (22a) to the center of the first threading hole (2b), the distance from the center of the first threading hole (2b) to the center of the second threading hole (2c), and the distance from the center of the second threading hole (2c) to the shielding layer (4) are different. The wire (1) can be selectively passed through one or more of the threading holes.

2. The audio cable according to claim 1, wherein: The outer periphery of the cross section of the outer support ring (21) is a circular structure, and the outer support ring (21) and the central support column (22) are evenly provided with three connecting parts (23).

3. The audio cable according to claim 1, wherein: The outer periphery of the cross section of the outer support ring (21) is a rounded triangle structure, and the outer support ring (21) and the central support column (22) are evenly provided with three connecting parts (23), and the three connecting parts (23) are correspondingly connected to the three sides of the rounded triangle structure.

4. The audio cable according to claim 1, wherein: The outer periphery of the cross section of the outer support ring (21) is a regular hexagonal structure, and the outer support ring (21) and the central support column (22) are evenly provided with three connecting parts (23), and the three connecting parts (23) are correspondingly connected to the sides of the regular hexagonal structure.

5. An audio connection cable according to claim 2, 3 or 4, characterized in that: The shielding layer (4) is formed by weaving, winding or extruding a conductive material.

6. An audio connection cable according to claim 2, 3 or 4, characterized in that: The outer wrapping layer (3) is wrapped with a shock-absorbing layer (5).

7. The audio connection cable according to claim 6, characterized in that: The shock-absorbing layer (5) is wrapped with a wear-resistant layer (6).

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