JP7254265B2 - Cable for signal transmission equipment and method for manufacturing cable for signal transmission equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cable for various signal transmission devices including audio equipment and a method for manufacturing a cable for signal transmission device.

Conventionally, signal transmission equipment cables for signal transmission equipment, for example, audio equipment cables used for audio equipment, have the function of improving the transmission speed of audio signals, but due to differences in transmission characteristics with respect to frequency, It is known to have subtle effects on the frequency components of the sound output from the speaker.

Conventionally, there have been proposals for devising cables for audio equipment, but most of them are related to the material and configuration of conductors (see, for example, Patent Document 1). Regarding the transmission characteristics with respect to frequency, it is necessary to devise other components in addition to devising the conductor.
In response to this, a device related to insulators has been proposed (see, for example, Patent Document 2). For example, the technology disclosed in Patent Document 2 relates to a plastic insulating layer.

However, it has been expected to improve the transmission characteristics of audio equipment cables using a plastic insulation layer over the entire sound range from mid-low range to high range.
On the other hand, an audio equipment cable has been proposed in which insulating paper is used as an insulating layer, and silk thread or cotton thread, which has a high air content and is considered to be preferable in terms of transmission characteristics, is wound horizontally as a protective layer (for example, See Patent Document 3).

Japanese Patent Laid-Open No. 63-236215 Japanese Utility Model Showa 61-14095 Japanese Patent Laid-Open No. 9-63362

However, in the cable for audio equipment disclosed in Patent Document 3, insulating paper is used for the insulating layer, and silk thread or cotton thread, which is said to have a high air content and is preferable in terms of transmission characteristics, is wound horizontally for the protective layer. Therefore, the manufacturing process may become complicated. In addition, the adjustment and stability of transmission characteristics due to the combination of the insulating layer and the protective layer may be a problem.

In addition, since the protective layer is formed by horizontally winding silk thread or cotton thread, when adjacent threads are separated from each other, transmission characteristics and the like may not be maintained.
Here, in the case of a structure in which adjacent threads are not separated from each other, for example, in the case of a structure in which a plurality of threads are woven together, since the cable for audio equipment is very thin, the woven threads must be cut and removed. A problem arises in that the work of exposing the conductive wire becomes very difficult.
Furthermore, when the woven thread is removed to expose the conductive wire, there arises a problem that the woven thread unravels from the cut end side over time.

The present invention provides an audio device that has a cylindrical braided portion formed by interlacing a plurality of silk threads as an insulating layer and a protective layer that are arranged on the outer periphery of a conductive wire, and that prevents the silk threads from fraying at both ends of the braided portion. It is an object of the present invention to provide a cable for various signal transmission equipment including a cable for signal transmission equipment and a method for manufacturing the cable for signal transmission equipment.
In addition, the present invention has a cylindrical braided portion formed by interlacing a plurality of silk threads as an insulating layer and a protective layer disposed around the conductive wire, and the work load of exposing the conductive wire from both ends of the braided portion is reduced. It is another object of the present invention to provide a cable for various signal transmission equipment, including audio equipment, and a method for manufacturing the cable for signal transmission equipment.

The present invention includes a conductive wire arranged along the longitudinal direction and arranged at the center in a cross-sectional direction orthogonal to the longitudinal direction, and a conductive wire arranged on the outer peripheral side in the cross-sectional direction of the conductive wire and at both ends in the longitudinal direction. a cylindrical braided portion in which a plurality of silk threads are arranged so as to expose the conductive wire from, and the braided portion is a shield braided portion arranged in the central portion in the longitudinal direction and a first fray-preventing braided portion arranged on one end side in the longitudinal direction, and a second fray-preventing braided portion arranged on the other end side in the longitudinal direction.

Further, in the signal transmission device cable, the first fraying prevention braided portion and/or the second fraying prevention braided portion have a higher braiding density in the longitudinal direction than the shielding braided portion, and/or Preferably, the number of braided layers in the cross-sectional direction is greater than the number of braided layers of the shield braided portion.

Further, in the signal transmission device cable, it is preferable that the first fraying prevention braided portion and/or the second fraying prevention braided portion are formed by fixing a plurality of interlaced silk threads to each other with a predetermined fixing agent. .

Further, in the cable for signal transmission equipment, it is preferable that the first fraying prevention braided portion and/or the second fraying prevention braided portion have a plurality of interlaced silk threads fixed to each other by sericin.

Further, in the signal transmission device cable, the first fraying prevention braided portion and/or the second fraying prevention braided portion have the plurality of silk threads on the outer end side opposite to the shielding braided portion in the longitudinal direction. is preferably located at the end of the

The present invention relates to a signal transmission device having the signal transmission device cable.

The signal transmission according to any one of the above, including a braiding step of forming a cylindrical braided portion by interlacing a plurality of silk threads on the outer peripheral side of the conductive wire while feeding the conductive wire in a predetermined feeding direction. A signal transmission device cable manufacturing method for manufacturing a device cable, wherein the braiding step includes a first high braiding step of forming the first fraying preventing braided portion arranged on one end side in the longitudinal direction; a middle braiding step of forming a shield braid portion; In the second high braiding step, the braiding density in the longitudinal direction is higher than the braiding density of the shield braided portion, and/or the number of braided layers in the cross-sectional direction is higher than the number of braided layers of the shield braided portion. The present invention relates to a method for manufacturing a cable for signal transmission equipment, wherein the first anti-fraying braided portion and/or the second anti-fraying braided portion are formed by braiding the plurality of silk threads.

Further, in the method for manufacturing a cable for signal transmission equipment, the braiding step is a step preceding the first high braiding step, and corresponds to a conductive wire arranged so as to be exposed from one longitudinal end side of the braided portion. A first low braiding step for forming a first removal braid portion and a step after the second high braiding step, corresponding to a conductive wire arranged to be exposed from the other longitudinal end side of the braided portion and a second low braiding step of forming a second removal braid portion, wherein in the first low braiding step and the second low braiding step, the braiding density in the longitudinal direction is lower than the braiding density of the shield braid portion. It is preferable that the first removable braided portion and the second removable braided portion are formed by braiding the plurality of silk threads so as to have a density.

Further, in the method for manufacturing a cable for signal transmission equipment, in the first low braiding step and the second low braiding step, the plurality of silk threads are braided so as not to be interlaced, and the first removal braid portion and the second removal braid portion are formed. A braid is preferably formed.

Further, in the method for manufacturing a cable for signal transmission equipment, in the braiding step, the state of braiding is adjusted by adjusting the feeding speed of the conductive wire, and the It is preferable that the feeding speed is slower than the feeding speed in the medium braiding step, and the feeding speed in the first low braiding step and the second low braiding step is higher than the feeding speed in the medium braiding step.

Further, in the method of manufacturing a cable for signal transmission equipment, the first braided removal part and/or the second braided part removed, and the conductive wire corresponding to the first braided part removed and/or the second braided part removed and a removing step of removing the plurality of silk threads constituting the first removal braid portion and/or the second removal braid portion cut in the cutting step. preferable.

Further, in the method for manufacturing a cable for signal transmission equipment, in the first high braiding step and the second high braiding step, the first fray-preventing braided portion and/or the second fray-preventing braided portion are fed in the feeding direction. It is preferable that the braiding density in the longitudinal direction and/or the number of braided layers in the cross-sectional direction of the first anti-fraying braided portion and/or the second anti-fraying braided portion is adjusted by a restricting portion disposed on the side. .

According to the present invention, a cylindrical braided portion formed by interlacing a plurality of silk threads is provided as an insulating layer and a protective layer disposed on the outer periphery of the conductive wire, and the silk threads are prevented from fraying at both ends of the braided portion. It is possible to provide a cable for various signal transmission equipment including equipment and a method for manufacturing the cable for signal transmission equipment.
Further, according to the present invention, a cylindrical braided portion formed by interlacing a plurality of silk threads is provided as an insulating layer and a protective layer disposed around the conductive wire, and the conductive wire is exposed from both ends of the braided portion. It is possible to provide a cable for various signal transmission devices including an audio device with reduced burden and a method for manufacturing the cable for signal transmission device.

1 is a plan view of a tone arm on which an audio device cable according to the present embodiment is mounted; FIG. FIG. 2 is a bottom view of area A in FIG. 1 and shows a state in which the cable for audio equipment according to the present embodiment is mounted; FIG. 2 is a bottom view of area B in FIG. 1 and shows a state in which the cable for audio equipment according to the present embodiment is mounted; It is a top view explaining the cable for audio equipments of this embodiment. 4A and 4B are cross-sectional views (schematic views) illustrating the structure of the cable for audio equipment according to the present embodiment, including (a) C1-C1 cross-sectional view, (b) C2-C2 cross-sectional view, and (c) C3-C3 in FIG. It is a sectional view. FIG. 4 is a flow diagram illustrating steps for manufacturing the cable for audio equipment according to the present embodiment. FIG. 2 is a schematic diagram illustrating the configuration of a braiding machine that forms a braided portion in the cable for audio equipment according to the present embodiment; FIG. 4 is a schematic diagram illustrating the manufacturing process of the cable for audio equipment of the present embodiment and the braided state of the braided portion in each process. It is a top view explaining the intermediate goods of the cable for audio equipments of this embodiment. 9A and 9B are cross-sectional views (schematic views) illustrating the structure of the intermediate product of the cable for audio equipment of the present embodiment, including (a) a D1-D1 cross-sectional view, (b) a D2-D2 cross-sectional view, and (c) in FIG. It is a D3-D3 sectional view. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining a method for manufacturing an audio equipment cable according to the present embodiment, (a) a schematic diagram showing an intermediate product of an audio equipment cable, (b) a schematic diagram showing a state in which a removal braid portion is cut, ( c) It is a schematic diagram showing a state in which a plurality of silk threads constituting the cut removed braided portion are removed (cut).

An audio device cable (signal transmission device cable) and an audio device cable manufacturing method (signal transmission device cable manufacturing method) according to an embodiment of the present invention will be described below with reference to the drawings.
A cable for audio equipment, which is a cable for signal transmission equipment according to the present embodiment, will be described with reference to FIGS. 1 to 5. FIG. FIG. 1 is a plan view of a tone arm equipped with an audio equipment cable according to the present embodiment. FIG. 2 is a bottom view of area A in FIG. 1, showing a state in which the cable for audio equipment according to the present embodiment is mounted. FIG. 3 is a bottom view of area B in FIG. 1, showing a state in which the cable for audio equipment according to the present embodiment is mounted. FIG. 4 is a plan view illustrating the cable for audio equipment according to this embodiment. FIG. 5 is a cross-sectional view (schematic view) for explaining the structure of the cable for audio equipment according to the present embodiment. ) is a cross-sectional view taken along line C3-C3.

First, a tone arm equipped with a cable for audio equipment will be described with reference to FIGS. 1 to 3. FIG. In this embodiment, a tone arm will be described as an audio device equipped with an audio device cable, but the present invention is not limited to this. Cables for audio equipment (cables for signal transmission equipment), for example, may be used for speakers, earphones, audio equipment bodies (internal wiring), and also for signal transmission equipment such as mobile phones and medical micro equipment. may also be used. The cable for signal transmission equipment of the present invention is used for various signal transmission equipment including audio equipment.

As shown in FIGS. 1 and 2, the audio device cable 10A has a portion inserted through the arm portion 120 of the tone arm 100 and a portion pulled out from the cord drawer portion 110. there is A portion of the audio device cable 10A drawn out from the cord drawing portion 110 is connected to an audio device main body (phono equalizer, amplifier, etc.) (not shown).

Also, as shown in FIGS. 1 and 3, the audio device cable 10B is arranged at the tip of the arm section 120 of the tone arm 100. As shown in FIG. The audio equipment cable 10B is used as a lead wire connected to the head section 130 . In the present embodiment, four audio equipment cables 10B are used as lead wires, but the present invention is not limited to this, and may be used as part of lead wires among a plurality of lead wires.

Next, the structure of the audio device cable 10 of this embodiment will be described with reference to FIGS. 4 and 5. FIG.
As shown in FIGS. 4 and 5 , the audio equipment cable 10 includes a conductive wire 20 and a braided portion 30 . The audio equipment cable 10 includes a conductive wire 20 arranged in the center in the cross-sectional direction, and a cylindrical braided portion 30 arranged around the outer circumference of the conductive wire 20 .

As shown in FIGS. 4 and 5, the conductive wire 20 is capable of transmitting a weak electrical signal, and is arranged along the longitudinal direction X of the audio equipment cable 10 and in a cross-sectional direction orthogonal to the longitudinal direction X. centered.
The conductive wire 20 has a first terminal portion 20 a and a second terminal portion 20 b that are exposed to the outside from both ends of the braided portion 30 . The first terminal portion 20a and the second terminal portion 20b are portions exposed by removing the silk thread 31 (silk thread forming a removed braided portion, which will be described later) arranged on the outer periphery of the conductive wire 20 .

In this embodiment, the conductive wire 20 is composed of seven copper wires 25 (for example, see FIG. 5) with a thickness of 0.05 mm. 25 is twisted. Here, the material and structure of the conductive wire 20 are not limited to these, and are appropriately selected according to the application and suitability. Examples of materials that can be used include single-crystal high-purity oxygen-free copper, tough-pitch copper, oxygen-free copper, linear-crystal oxygen-free copper, continuous-crystal high-purity oxygen-free copper, silver, and alloys. Also, the number, shape, etc. of the metal wires forming the conductive wire 20 are not particularly limited.

As shown in FIGS. 4 and 5, the braided portion 30 is arranged on the outer peripheral side of the conductive wire 20 in the cross-sectional direction and is arranged so as to expose part of the conductive wire 20 from both ends in the longitudinal direction X. As shown in FIGS. The braided portion 30 is a cylindrical braided member in which a plurality of silk threads 31 are interlaced with each other. Braided portion 30 functions as an insulating layer and a protective layer.

In this embodiment, the braided portion 30 is formed by interlacing 16 silk threads 31 . Here, the number of silk threads 31 is not particularly limited, and may be 12 or 24, for example. The number of silk threads 31 is set to a suitable number depending on the thickness of the conductive wire 20, the thickness of the silk threads, and the like.
Also, in the present embodiment, the thickness of the silk thread 31 is 21 denier, but it is not particularly limited. The thickness of the silk thread 31 may be, for example, 14 to 28. The silk thread 31 is composed of, for example, 7 to 8 strands of raw silk (containing a starch component such as cercin). Here, in the present embodiment, silk thread includes cocoon thread and raw silk.

As shown in FIGS. 4 and 5, the braided portion 30 includes a shield braided portion 33 arranged in the central portion in the longitudinal direction X, a first unraveling prevention braided portion 35a arranged at one end side in the longitudinal direction X, and a second unraveling prevention braided portion 35b arranged on the other end side in the longitudinal direction X.

The shield braided portion 33 is a cylindrical braided portion formed by braiding a plurality of silk threads 31 so as to be interlaced, and functions as an insulating layer and a protective layer. The shield braided portion 33 is formed by interlacing the silk threads 31 without gaps.
The knitting density (knitting row/cm) in the shield braided portion 33 is, for example, 25 to 40 knitting rows/cm, preferably 30 to 40 knitting rows/cm, and more preferably 30 to 35 knitting rows/cm. Here, the braiding density of the shield braided portion 33 is freely set according to the number and thickness of the silk threads, the design, etc. within a range that does not hinder the insulating and protective functions.

The shield braided portion 33 is a cylindrical portion arranged in the central portion of the braided portion 30 in the longitudinal direction X, and is sandwiched between the first fraying prevention braided portion 35a and the second fraying prevention braided portion 35b in the longitudinal direction X. are placed. Both ends of the shield braided portion 33 are sandwiched between the first fraying prevention braided portion 35a and the second fraying prevention braided portion 35b, so that the silk thread 31 is not frayed. Therefore, the shield braided portion 33 is configured to maintain transmission characteristics in addition to stable insulation and protection.
The length (length in the longitudinal direction X) and thickness (diameter in the cross-sectional direction) of the shield braided portion 33 are not particularly limited, but the length is, for example, 25 to 40 mm, preferably 28 to 38 mm, more preferably 30 mm. 35 mm, and the thickness is, for example, 80 to 160 μm, preferably 80 to 130 μm, more preferably 80 to 100 μm.

4 and 5, the first fray-preventing braided portion 35a and/or the second fray-preventing braided portion 35b have a braiding density in the longitudinal direction X higher than that of the shield braided portion 33. and/or the number of braided layers in the cross-sectional direction is greater than the number of braided layers of the shield braided portion 33 . The first fray-preventing braided portion 35a and/or the second fray-preventing braided portion 35b are arranged at both ends of the braided portion 30, and are portions where the crossing condition (braiding condition) is adjusted so that the silk thread 31 does not fray easily.

The first unraveling prevention braided portion 35 a and/or the second unraveling prevention braided portion 35 b are configured, for example, such that the braiding density in the longitudinal direction X is higher than the braiding density of the shield braided portion 33 . The first fray-preventing braided portion 35a and/or the second fray-preventing braided portion 35b has, for example, a braiding density in the longitudinal direction X of 1.1 to 5, preferably 1.3 to 1.3, relative to the braiding density of the shield braided portion 33. 3, more preferably 1.5 to 2. Here, when the number of braids in the cross-sectional direction of the first fray-preventing braided portion 35a and/or the second fray-preventing braided portion 35b is adjusted to be greater than that of the shield braided portion 33, the braiding density in the longitudinal direction X is as described above. may be outside the numerical range of , and may be smaller than the braid density of the shield braided portion 33 .

Further, the first unraveling prevention braided portion 35 a and/or the second unraveling prevention braided portion 35 b are formed so that the number of braided layers in the cross-sectional direction is larger than the number of braided layers of the shield braided portion 33 , for example. The number of braided layers in the cross-sectional direction of the first unraveling prevention braided portion 35a and/or the second unraveling prevention braided portion 35b is, for example, 2 to 10, preferably 2 to 6, more preferably 2 to 6, relative to the number of braided layers of the shield braided portion 33. Preferably, it is configured to be 3-5.

The number of braided layers is the number of braided cylinders and the number of silk threads in the cross-sectional direction. The number of braided layers is the number of total silk thread (16 in this embodiment) sets in the cross-sectional direction. Since the distance between the silk threads 31 adjacent to each other in each braided layer increases toward the outside of the outer circumference, the silk threads 31 of each braided layer do not overlap neatly in the cross-sectional direction, and the silk threads 31 of the outer layer do not overlap between the silk threads 31 of the inner layer. may be placed in such a way that Also in this case, the number of knitted layers is naturally added. In this embodiment, the number of braided layers of the shield braided portion 33 is one, and the number of braided layers of the first anti-fraying braided portion 35a and the second anti-fraying braided portion 35b is four.

Here, when the braiding density in the longitudinal direction X of the first fraying prevention braided portion 35a and/or the second fraying prevention braided portion 35b is adjusted to be higher than that of the shield braided portion 33, the number of braided layers in the cross-sectional direction is It may be outside the numerical range described above, and may even be the same as the number of braided layers in the cross-sectional direction of the shield.

In addition, as shown in FIG. 4, the first fraying prevention braided portion 35a and/or the second fraying prevention braided portion 35b has a plurality of silk threads 31 on the outer end side opposite to the shield braided portion 33 in the longitudinal direction X, respectively. is located at the end 32 of the . At the outer end of the first fray-preventing braided portion 35a or the second fray-preventing braided portion 35b, the respective ends of the plurality of silk threads 31 cut and removed to expose the first terminal portion 20a or the second terminal portion 20b are attached. 32 are arranged. Normally, when the silk thread 31 is cut and removed to expose the first terminal portion 20a or the second terminal portion 20b, the silk thread 31 is unraveled from the end portion 32 side. Since 35a and/or the second unraveling prevention braided portion 35b are formed to have a high knitting density and/or multiple layers, the fraying of the silk thread 31 is prevented.

In addition, the first anti-fraying braided portion 35a and/or the second anti-fraying braided portion 35b may be formed by, for example, fixing a plurality of silk threads 31 interlaced with each other with a predetermined fixing agent. This further prevents the fraying of the silk thread 31 in the first fray-preventing braided portion 35a and/or the second fray-preventing braided portion 35b. Here, the first fray-preventing braided portion 35a and/or the second fray-preventing braided portion 35b has a high braiding density in the longitudinal direction X and/or a plurality of braided layers in the cross-sectional direction, as described above. It is preferably fixed with a fixing agent in an adjusted state.

As the predetermined sticking agent, for example, a sticking agent containing a general size component can be used, but sericin extracted from cocoon yarn or raw silk is particularly preferable. For example, it is preferable to put a cocoon layer or raw silk in boiling water to dissolve sericin, and apply gel-like sericin to the first and second fray-preventing braided portions 35a and 35b to fix them. If the first fray-preventing braided portion 35a and/or the second fray-preventing braided portion 35b are fixed with sericin extracted from silk, it is preferable because it does not adversely affect transmission characteristics.

Moreover, without providing the first fraying prevention braided portion 35a and/or the second fraying prevention braided portion 35b with adjusted knitting density etc., both ends of the shield braided portion 33 are fixed with a binding agent such as sericin to prevent fraying. You can also let In this case, the portion fixed by the adhesive functions as the first anti-fraying braided portion and the second anti-fraying braided portion.

The length (length in the longitudinal direction X) and thickness (diameter in the cross-sectional direction) of the first unraveling prevention braided portion 35a and/or the second unraveling prevention braided portion 35b are not particularly limited, but the length is, for example, 1 ~4 mm, preferably 1 to 3 mm, more preferably 1 to 2 mm, and a thickness of, for example, 10 to 40 mm, preferably 10 to 30 mm, more preferably 10 to 20 mm.

Next, a method for manufacturing the cable 10 for audio equipment according to the present embodiment will be described with reference to FIGS. 6 to 11. FIG. FIG. 6 is a flow diagram illustrating steps for manufacturing the cable for audio equipment according to the present embodiment. FIG. 7 is a schematic diagram illustrating the configuration of a braiding machine that forms the braided portion of the cable for audio equipment according to the present embodiment. FIG. 8 is a schematic diagram for explaining the manufacturing process of the cable for audio equipment according to the present embodiment and the braided state of the braided portion in each process. FIG. 9 is a plan view illustrating an intermediate product of the cable for audio equipment according to this embodiment. FIG. 10 is a cross-sectional view (schematic view) explaining the structure of the intermediate product of the cable for audio equipment according to the present embodiment, including (a) a D1-D1 cross-sectional view and (b) a D2-D2 cross-sectional view in FIG. , (c) is a cross-sectional view taken along line D3-D3. 11A and 11B are diagrams for explaining the method of manufacturing the cable for audio equipment according to the present embodiment. FIG. 2C is a schematic diagram, and (c) is a schematic diagram showing a state in which a plurality of silk threads constituting the cut removed braided portion are removed (cut).

As shown in FIG. 6, the audio equipment cable manufacturing method for manufacturing the audio equipment cable 10 of the present embodiment includes a braiding step ST10, a cutting step ST20, and a removing step ST30.

The braiding step ST10 is a step of forming a cylindrical braided portion 30 by interlacing a plurality of silk threads 31 on the outer peripheral side of the conductive wire 20 while feeding the conductive wire 20 in a predetermined feeding direction.
The braiding step ST10 includes a first low braiding step ST11, a first high braiding step ST12, a medium braiding step ST13, a second high braiding step ST14, and a second low braiding step ST15.
The intermediate braiding step ST13 is a step of braiding a plurality of silk threads 13 at a standard knitting density or the like. The first low braiding step ST11 and the second low braiding step ST15 are steps of braiding so that the silk threads 31 are not interlaced.

In each step of the braiding step ST10, the plurality of silk threads 31 are braided by, for example, a predetermined braiding machine 200 (see FIG. 7).
As shown in FIG. 7, for example, the braiding machine 200 includes a disk-shaped running base 210, a plurality of (16 in this embodiment) running sections 220 that can run on the running base 210, and the running sections 220 a bobbin 230 rotatably arranged at the top; a braiding die 240 arranged above; A plurality of running parts 220 run on two running paths formed on a running base 210 (two running paths that are wavy in the circumferential direction and whose unevenness is shifted in the circumferential direction), thereby driving a plurality of running parts 220. A plurality of silk threads 31 let out from a bobbin 230 are interlaced in a braiding die 240 to form a cylindrical braided portion 30 . Here, the device used in the braiding step ST10 is not limited to the braiding machine shown in FIG. 7, and the system, type, etc. are not particularly limited. In addition, by making the inner diameter of the braiding die 240 variable, the unraveling prevention braided portion can be smoothly inserted, and the braiding yarn can be made uniform.

In the present embodiment, in the braiding step ST10, the state of braiding is adjusted by adjusting the feeding speed of the conductive wire 20 .
As shown in FIG. 8, the feed speed in the first high braiding step ST12 and the second high braiding step ST14 is adjusted to be slower than the feed speed in the medium braiding step ST13. As a result, in the first high braiding step ST12 and the second high braiding step ST14, the plurality of silk threads 31 are braided at a high braiding density and/or with multiple braid layers to form the first unraveling prevention braided portion 35a and/or the second unraveling prevention braided portion 35a. A prevention braid 35b can be formed.

Also, the feed speed in the first low braiding step ST11 and the second low braiding step ST15 is adjusted to be faster than the feed speed in the medium braiding step ST13. Thus, in the first low braiding step ST11 and the second low braiding step ST15, the plurality of silk threads 31 are braided so as not to be interlaced to form the first removal braid portion 37a and the second removal braid portion 37b. can.

In the intermediate braiding step ST13, for example, the conductive wire 20, which is a twisted wire formed by twisting seven copper wires 25 with a thickness of 0.05 mm, is moved at a predetermined feed rate, and 16 wires with a thickness of 21 denier are moved. The silk thread 31 (7 and 8 raw silk threads are twisted to form a single silk thread) forms a cylindrical shield braided portion 33 around the outer periphery of the conductive wire 20, but the feeding speed of the conductive wire 20 is It is not particularly limited, and can be freely set according to the braiding density, braiding pattern and the number of silk threads.
In this embodiment, the feeding speed (of the conductive wire 20) is based on the feeding speed in the intermediate braiding step ST13 for forming the shield braided portion 33, and the first fraying prevention braided portion 35a and/or the second The speed is set at a low speed in the step of forming the second fraying prevention braided portion 35b, and the speed is set at a high speed in the steps of forming the first terminal portion 20a and the first terminal portion 20a.

Here, when the audio equipment cable 10 is continuously manufactured, the first low braiding step ST11 is a step common to the second low braiding step ST15 in the manufacturing process of the audio equipment cable 10 manufactured immediately before. The second low braid step ST15 is a step common to the first low braid step ST11 in the manufacturing process of the audio equipment cable 10 immediately after.

Next, each step in the braiding step ST10 will be explained.
As shown in FIGS. 6 to 10, the first low braiding step ST11 is a step preceding the first high braiding step ST12, and is arranged so as to be exposed from one end side in the longitudinal direction X of the braided portion 30. As shown in FIGS. This is the step of forming the first removable braided portion 37a corresponding to the terminal portion 20a (the conductive wire 20).
In the first low braiding step ST11, the plurality of silk threads 31 are braided so that the braiding density in the longitudinal direction X is lower than the braiding density of the shield braided portion 33 by increasing the feeding speed of the conductive wire 20. , the first removal braid portion 37a is formed. Further, in the first low braiding step ST11, it is preferable that the feeding speed of the conductive wire 20 is increased so that the plurality of silk threads 31 are braided so as not to be interlaced to form the first removed braided portion 37a. Here, "do not interlace" indicates a state in which the braid is not formed, and indicates a state in which the silk threads 31 are not interlaced at all, a state in which the plurality of silk threads 31 simply intersect, or a state in which the silk threads 31 are easily unraveled. For example, the state of FIG. 9 and FIG.

Subsequently, the first high braiding step ST12 is a step of forming the first unraveling prevention braided portion 35a arranged on one end side in the longitudinal direction X. As shown in FIG.
In the first high braiding step ST12, by slowing down or stopping the feeding speed of the conductive wire 20, the braiding density in the longitudinal direction X is higher than the braiding density of the shield braided portion 33, and/or A plurality of silk threads are braided so that the number of braided layers is greater than the number of braided layers of the shield braided portion 33 to form the first unraveling prevention braided portion 35a.

Here, in the first high braiding step ST12, the regulating portion 250 arranged on the feeding side of the conductive wire 20 in the feeding direction of the first fraying prevention braided portion 35a in the longitudinal direction X of the first fraying prevention braided portion 35a The knit density and/or the number of knit layers in the cross-sectional direction may be adjusted.
The restricting portion 250 is a member that restricts formation of the first fraying prevention braided portion 35a formed between the braiding die 240 and the restricting portion 250 from below. In the first high braiding step ST12, for example, when the feed of the conductive wire 200 is stopped to form the first unraveling prevention braided portion 35a, the formation of the braid extending downward (sending source side) in the first unraveling prevention braided portion 35a is performed. While regulating, the regulating portion 250 can be moved downward at a predetermined speed. By using the regulating portion 250 in this manner, the braiding conditions and shape of the first unraveling prevention braided portion 35a can be easily adjusted.

Subsequently, the intermediate braiding step ST13 is a step of forming the shield braided portion 33 .
In the intermediate braiding step ST13, the shield braided portion 33 is formed by braiding the plurality of silk threads 31 by setting the feeding speed of the conductive wire 20 to a standard (medium) speed. In the intermediate braiding step ST13, a plurality of silk threads 31 are braided under conditions such that the braided portion achieves desired transmission properties, insulation properties, and protective properties. The conditions in the intermediate braiding step ST13 serve as the criteria for the conditions in other steps.

Subsequently, the second high braiding step ST14 is a step of forming the second unraveling prevention braided portion 35b arranged on the other end side in the longitudinal direction X. As shown in FIG.
In the second high braiding step ST14, by slowing down or stopping the feeding speed of the conductive wire 20, the braiding density in the longitudinal direction X is higher than the braiding density of the shield braided portion 33, and/or The second anti-fraying braided portion 35b is formed by braiding a plurality of silk threads so that the number of braided layers is greater than the number of braided layers of the shield braided portion 33 . Here, the use and effects of the restricting portion 250 are the same as in the first high braid step ST12.

Subsequently, the second low braiding step ST15 is a step after the second high braiding step ST14, and the second terminal portion 20b (conductive wire 20) is the step of forming the second removable braided portion 37b.
In the second low braiding step ST15, the plurality of silk threads 31 are braided so that the braiding density in the longitudinal direction X is lower than the braiding density of the shield braided portion 33 by increasing the feeding speed of the conductive wire 20. , the second removal braid portion 37b is formed. Further, in the second low braiding step ST15, it is preferable that the feeding speed of the conductive wire 20 is increased so that the plurality of silk threads 31 are braided so as not to be interlaced to form the second removed braided portion 37b.

Subsequently, as shown in FIGS. 6 and 11, in the cutting step ST20, the first removal braid portion 37a and/or the second removal braid portion 37b and the first removal braid portion 37a and/or the second removal braid portion 37b is a step of cutting the conductive wire 20 corresponding to the .
As shown in FIGS. 11(a) and 11(b), in the cutting step ST20, the braided portion to be removed 37 (common portion of the first braided portion to be removed 37a and the second braided portion to be removed 37b of another audio equipment cable), By cutting the conductive wire 20 arranged inside the removed braided portion 37 in the cross-sectional direction at a predetermined position (middle in the longitudinal direction X), a part of the conductive wire 20 is exposed and the silk thread 31 (39) is unraveled. (easy to remove).

Subsequently, as shown in FIGS. 6 and 11, in the removing step ST30, a plurality of silk threads 39 (31) forming the first removed braided portion 37a and/or the second removed braided portion 37b cut in the cutting step ST20 are removed. is a step of removing In the removing step ST30, portions (root portions) of the plurality of silk threads 39 (31) on the side of the first fraying prevention braided portion 35a or the second fraying prevention braided portion 35b are cut. In the removing step ST30, the loose silk thread 39 is removed, so that it can be easily removed without covering the conductive wire 20. FIG. In the cutting step ST20 and the removing step ST30, the plurality of silk threads 39 (31) are cut and removed. Unraveling from the end portion 32 side is prevented.

According to the audio device cable 10 of the present embodiment, the following effects are obtained.
The audio equipment cable of the present embodiment is arranged on the outer peripheral side of the conductive wire in the cross-sectional direction and is arranged so that the conductive wire is exposed from both ends in the longitudinal direction. It has a braided part.
As a result, a plurality of silk threads are interlaced with each other to form an air layer, thereby improving the transmission speed of the conductive wire and providing an audio equipment cable that contributes to an improvement in sound quality. Further, this makes it possible to provide an audio equipment cable having a lightweight insulating layer. Moreover, thereby, it is possible to provide an audio equipment cable having an insulating layer with high tensile strength. Further, this makes it possible to provide an audio equipment cable having an insulating layer that is less susceptible to temperature effects.

The braided portion has a first unraveling prevention braided portion arranged on one end side in the longitudinal direction, and a second unraveling prevention braided portion arranged on the other end side in the longitudinal direction. Thereby, the braided portion can prevent the plurality of silk threads from unraveling over time. In addition, this can prevent a change in the braided state of the silk thread in the shield braided portion, so that the sound quality improvement function and insulation of the cable for audio equipment can be maintained.

In addition, the first unraveling prevention braided portion and/or the second unraveling prevention braided portion have a braiding density in the longitudinal direction higher than that of the shield braided portion, and/or the number of braided layers in the cross-sectional direction is the shield braid. It is configured to be larger than the number of knitted layers of the part. As a result, it is possible to suitably prevent the plurality of silk threads from unraveling.

In addition, the first fray-preventing braided portion and/or the second fray-preventing braided portion are formed by fixing a plurality of interlaced silk threads to each other with a predetermined fixing agent. Thereby, it is possible to more preferably prevent the plurality of silk threads from unraveling.

In addition, the (cut) ends of the plurality of silk threads are arranged on the first anti-fraying braided portion and/or the second anti-fraying braided portion on the outer end side opposite to the shield braided portion in the longitudinal direction. As a result, it is possible to suitably prevent the plurality of silk threads from unraveling from the cut end side.

In addition, in the method for manufacturing a cable for audio equipment according to the present embodiment, in the first low braiding step and the second low braiding step, a plurality of silk threads are used so that the braiding density in the longitudinal direction is lower than the braiding density of the shield braided portion. are braided to form a first removal braid portion and a second removal braid portion. As a result, according to the method of manufacturing the cable for audio equipment of the present embodiment, it is possible to reduce the work load of exposing a portion (terminal portion) of the conductive wire from both end portions.
In addition, since the insulating layer is formed of silk thread, the weight of the cable itself can be reduced as compared with a cable formed of vinyl or the like.

Further, in the method for manufacturing an audio equipment cable of the present embodiment, in the first low braiding step and the second low braiding step, the plurality of silk threads are braided so as not to be interlaced, and the first removal braid portion and the second removal braid portion are formed. A braid is formed. As a result, according to the audio equipment cable manufacturing method of the present embodiment, it is possible to further reduce the work load of exposing a part (terminal portion) of the conductive wire from both end portions.

Further, in the method for manufacturing a cable for audio equipment of the present embodiment, in the braiding step, the state of braiding is adjusted by adjusting the feeding speed of the conductive wire, and the above-mentioned The feed speed is lower than the feed speed in the middle braiding step, and the feed speeds in the first low braiding step and the second low braiding step are adjusted to be higher than the feed speed in the medium braiding step. Thus, according to the audio equipment cable manufacturing method of the present embodiment, it is possible to easily form the unraveling prevention braided portion and the removable braided portion.

Further, in the audio equipment cable manufacturing method of the present embodiment, the first braided removal portion and/or the second braided removal portion and the conductive wire corresponding to the first braided removal portion and/or the second braided removal portion are provided. a cutting step of cutting at a point; and a removing step of removing a plurality of silk threads forming the first removed braided portion and/or the second removed braided portion cut in the cutting step. As a result, according to the audio equipment cable manufacturing method of the present embodiment, it is possible to further reduce the work load of exposing a portion (terminal portion) of the conductive wire from both ends.

Further, in the method for manufacturing a cable for audio equipment according to the present embodiment, the first fray-preventing braided portion and/or the second fray-preventing braided portion are controlled by the restricting portion arranged on the sending side in the feeding direction. And/or the knitting density in the longitudinal direction and/or the number of knitting layers in the cross-sectional direction of the second anti-unraveling braided portion is adjusted. Thus, according to the audio equipment cable manufacturing method of the present embodiment, the knitting density and the number of knitted layers of the unraveling prevention portion can be adjusted appropriately, so that it is possible to provide an audio equipment cable having a suitable unraveling prevention function. can. In addition, it is possible to provide an audio equipment cable with an improved design.

The present invention is not limited to the above-described embodiments, and includes modifications, improvements, etc. within the scope of achieving the object of the present invention.
Although the braided portion is formed by a braiding machine in the above-described embodiment, the present invention is not limited to this, and the type of braiding method is not particularly limited.

Also, in the embodiment, silk threads of the same thickness are used, but the present invention is not limited to this, and silk threads of different thicknesses may be used in combination.

Moreover, the color of the silk thread is not particularly limited, and may be white, black, or any color. Also, all silk threads may be of the same color, or some threads may be of different colors. Also, by adjusting the color and weave of the silk thread, it is possible to provide an audio equipment cable having a braided portion with excellent color, pattern and design.

Also, in this embodiment, the cable for audio equipment was exemplified as an example, but the cable is not limited to audio equipment. It may also be used in transmission equipment.

10 Cables for audio equipment (cables for signal transmission equipment)
20 Conductive wire 20a First terminal portion 20b Second terminal portion 30 Braided portion 31 Silk thread 32 End portion 33 Shield braided portion 35a First unraveling prevention braided portion 35b Second frayed prevention braided portion 37a First removal braid portion 37b Second removal braid Section 100 tone arm 200 braiding machine ST10 braiding step ST20 cutting step ST30 removing step

Claims (6)

a conductive wire arranged along a longitudinal direction and centrally arranged in a cross-sectional direction orthogonal to the longitudinal direction;
a cylindrical braided portion arranged on the outer peripheral side of the conductive wire in the cross-sectional direction and arranged so as to expose the conductive wire from both ends in the longitudinal direction, wherein a plurality of silk threads are interlaced with each other; ,
The braided portion is
a shield braided portion arranged in the central portion in the longitudinal direction;
a first unraveling prevention braided portion arranged on one end side in the longitudinal direction;
a second anti-unraveling braided portion arranged on the other end side in the longitudinal direction;
A method for manufacturing a cable for signal transmission equipment, comprising:
A braiding step of forming the cylindrical braided portion by interlacing a plurality of silk threads on the outer peripheral side of the conductive wire while feeding the conductive wire in a predetermined feeding direction ,
The braiding step includes
a first high braiding step of forming the first anti-unraveling braided portion arranged on one end side in the longitudinal direction;
a middle braiding step of forming the shield braided portion;
a second high braiding step of forming the second unraveling prevention braided portion disposed on the other end side in the longitudinal direction,
In the first high braiding step and the second high braiding step,
The plurality of silk threads are braided so that the knitting density in the longitudinal direction is higher than the knitting density of the shield braided portion and/or the number of braided layers in the cross-sectional direction is greater than the number of braided layers of the shield braided portion. A method for manufacturing a cable for signal transmission equipment, wherein the first anti-fraying braided portion and/or the second anti-fraying braided portion are formed. The braiding step includes
a first low braiding step, which is a step preceding the first high braiding step, for forming a first removed braided portion corresponding to a conductive wire arranged to be exposed from one longitudinal end side of the braided portion;
a second low braiding step, which is a step subsequent to the second high braiding step, for forming a second removed braided portion corresponding to the conductive wire arranged to be exposed from the other longitudinal end side of the braided portion; including
In the first low braid step and the second low braid step,
The first removal braid portion and the second removal braid portion are formed by braiding the plurality of silk threads so that the braid density in the longitudinal direction is lower than that of the shield braid portion. 2. The method for manufacturing a cable for signal transmission equipment according to 1 . In the first low braid step and the second low braid step,
3. The method of manufacturing a cable for signal transmission equipment according to claim 2 , wherein the first removable braided portion and the second removable braided portion are formed by braiding the plurality of silk threads so as not to intersect. In the braiding step, the braiding state is adjusted by adjusting the feeding speed of the conductive wire,
The feed speed in the first high braiding step and the second high braiding step is slower than the feed speed in the medium braiding step,
4. The method of manufacturing a cable for signal transmission equipment according to claim 2 , wherein said feeding speed in said first low braiding step and said second low braiding step is faster than said feeding speed in said medium braiding step. a cutting step of cutting the first removed braid portion and/or the second removed braid portion and the conductive wire corresponding to the first removed braid portion and/or the second removed braid portion at a predetermined location;
5. The signal according to any one of claims 2 to 4 , further comprising a removing step of removing the plurality of silk threads forming the first removed braid portion and/or the second removed braid portion cut in the cutting step. A method for manufacturing a cable for transmission equipment. In the first high braiding step and the second high braiding step,
The first raveling prevention braided portion and/or the second raveling prevention braided portion are controlled by a restricting portion disposed on the feed origin side in the feeding direction of the first raveling prevention braid portion and/or the second raveling prevention braid portion. 6. The method of manufacturing a cable for signal transmission equipment according to claim 1, wherein the knitting density in the longitudinal direction and/or the number of knitting layers in the cross-sectional direction are adjusted.

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