WO2018220765A1 - Electronic apparatus equipped with stretchable transmission line and method for manufacturing same - Google Patents

Abstract

This electronic apparatus equipped with a stretchable transmission line is characterized in that: the stretchable transmission line, in which at least one resin-coated conductive wire is wound around a core comprising a water-impermeable elastic body, is inserted through a transmission line extraction hole provided in a casing of the electronic apparatus and is connected to an inner circuit; the gap between the stretchable transmission line and the transmission line extraction hole is cut off from water by a resin water cut-off body; and when the stretchable transmission line, one end of which is in the water cut-off portion and the other end of which is outside of the water cut-off portion, is stretched to 0.5 times the initial elongation at break, the outer diameter change rate of the core in the water cut-off portion is within ±5%.

Description

Electronic device with elastic transmission line and manufacturing method thereof

The present invention relates to an electronic device with a stretchable transmission line having water-stopping property and a manufacturing method thereof.

In recent years, elastic transmission lines capable of transmitting power and signals have been developed (Patent Documents 1 and 2), and are being used for various applications such as robots, wearable devices, and portable devices.
Depending on the range of uses, sports earphones, head-mounted displays, EMS suits, etc. are expected to come into contact with sweat, AC adapters, etc. that are at risk of short-circuiting due to water immersion, and wiring for bicycles and motorcycles As a result, it is a problem to secure waterproofness at a connection part with an electronic device.

A general electronic device is waterproofed by integrating a cable and a housing of the electronic device so that there is no gap, and various waterproofing methods have been proposed. As an example, there are a method of sealing using an O-ring or the like between a casing of an electronic device and a cable (Patent Document 3) and a method of waterproofing a device having a shield layer (Patent Document 4).
Since the outer diameter of the stretchable transmission line changes with expansion and contraction, there is a problem that a gap is easily generated in the connecting portion and it is difficult to stop water. Moreover, in the case of using a silver-plated fiber or the like as the conductor wire, the conductor wire itself is not waterproof, and it is difficult to ensure waterproofness.
Thus, the waterproof technology in an electronic device with a stretchable transmission line is a difficult problem, and there has not been disclosed so far.

International Publication No. 2009/157070 JP 2009-054312 A JP 2003-31967 A JP 2016-119821

Accordingly, an object of the present invention is to establish a waterproof technology for an electronic device with a stretchable transmission line, and further a waterproof technology that can withstand repeated use. The manufacturing method is provided.

As a result of intensive studies to achieve the above object, the present inventors have found that at least one resin-coated conductor wire is wound around a core made of a water-impermeable elastic body. The transmission line is inserted into a transmission line outlet provided in the housing of the electronic device and connected to the internal circuit, and at least a gap between the extraction port and the elastic transmission line is a resin in the transmission line. It has a water stop part filled with a water stop, and when the stretchable transmission line is further stretched 0.5 times the initial breaking extension rate, the outer diameter change rate of the core material of the water stop part is ± 5 It has been found that an electronic device with a stretchable transmission line can be obtained by making it within the range of%, and even when stretched or contracted, a water stoppage can be ensured, and the present invention has been achieved.

That is, the present invention provides the following inventions.
[1] A transmission in which a stretchable transmission line wound around at least one resin-coated conductor wire around a core made of a water-impermeable elastic body is provided in a casing of an electronic device It is connected to the internal circuit through the wire outlet, and the gap between the elastic transmission line and the transmission wire outlet is stopped by a resin water stop, and the elastic transmission line in the water stop is When the elastic transmission line having one end and the other end not in the water stop portion is extended 0.5 times the initial breaking extension rate, the outer diameter change rate of the core material in the water stop portion is Electronic equipment with stretchable transmission line characterized by being within ± 5%.
[2] The electronic device with a stretchable transmission line according to [1], wherein a gap between the conductor wire and the core material constituting the stretchable transmission line is stopped by the waterstop.
[3] When the elastic transmission line having the one end of the elastic transmission line in the water stop portion and the other end of the non-water stop portion is extended by 0.5 times the initial breaking elongation rate The electronic device with a stretchable transmission line according to [1] or [2], wherein a gap between the conductor wire and the core material is less than 5 mm.
[4] In the water stop portion, the outer diameter of the core material of the stretchable transmission line is the outer diameter of the core material when relaxed * √ {1 / ((100 + 0.2 times the initial elongation at break) / 100) } The electronic device with a stretchable transmission line according to any one of [1] to [3], which is further reduced to the following.
[5] In the water stop portion, the outer diameter of the core material of the stretchable transmission line is the outer diameter of the core material when relaxed by a caulking tool * √ {1 / ((100 + 0.2 times the initial breaking elongation) / 100)} The electronic device with a stretchable transmission line according to [4], which is thinned as follows.
[6] Reduce the diameter of the transmission line outlet to a thickness equal to or less than the thickness of the elastic transmission line outer diameter * √ {1 / ((100 + 0.2 times the initial breaking elongation) / 100)} when relaxed. The electronic device with a stretchable transmission line according to any one of [1] to [3].
[7] The stretchable transmission line according to any one of [1] to [4], wherein the water stop portion is formed in a state where the stretchable transmission line is stretched by 0.5 times or more of the initial breaking elongation rate. Manufacturing method of electronic equipment with a mark.
[8] An electronic device in which an elastic transmission line wound around at least one resin-coated conductor wire is connected around a core made of a water-impermeable elastic body, A space partitioned by the casing surface and a waterproof inner wall is formed inside the casing of the device, and the stretchable transmission line is provided on the inner wall from a transmission line outlet 1 provided on the casing surface. It is inserted through the transmission line outlet 2 and connected to the internal circuit, and the gap between the stretchable transmission line and the transmission line outlet 2 is stopped by a resin water stop and is in the space. An electronic apparatus with a stretchable transmission line, wherein a part of the stretchable transmission line is fixed in the housing.
[9] The electronic device with a stretchable transmission line according to [8], wherein a gap between the conductor wire and the core material constituting the stretchable transmission line is stopped by the waterstop.
[10] The electronic device with a stretchable transmission line according to [8] or [9], wherein a part of the stretchable transmission line is tied and fixed to a protrusion provided in the housing.
[11] The electronic device with a stretchable transmission line according to [8] or [9], wherein a knot is formed and fixed to a part of the stretchable transmission line.
[12] The elastic transmission line according to any one of [1] to [6] and [8] to [11], wherein at least a part around the conductor wire is further covered with a fiber layer With electronic equipment.
[13] The electronic device with a stretchable transmission line according to [12], wherein at least a part of the fiber layer is melted or dissolved.

The electronic device with a stretchable transmission line of the present invention that has a waterstop performance is highly practical, requires a stretchable wiring and has a waterproof performance because the waterstop performance is maintained even when repeatedly stretched and used. The present invention provides a required electronic device and a manufacturing method thereof.

It is a schematic diagram which shows the 1st aspect of the electronic device with a stretchable transmission line of this invention. It is a schematic diagram which shows the 2nd aspect of the electronic device with a stretchable transmission line of this invention. It is a figure for demonstrating the method of water permeability evaluation of the core material of the elastic | stretch transmission line which concerns on this invention. It is a figure for demonstrating the method to evaluate the water stop of the elastic | stretch transmission line which concerns on this invention. It is a figure for demonstrating that a clearance gap will be made around a core material (FIG.5 (b)) by extending | stretching the elastic transmission line which concerns on this invention (FIG.5 (a)). The figure for demonstrating that a space | gap cannot be made around a core material even if it extends | stretches by narrowing the elastic | stretch transmission line which concerns on this invention beforehand (FIG. 6 (a)). It is. It is a figure for demonstrating the effect by fixing a part of elastic | stretch transmission line which concerns on this invention between two transmission-line outlets in a housing | casing. It is a figure for demonstrating the state which penetrated the elastic | stretch transmission line in the housing | casing of the electronic device which concerns on this invention using a housing | casing model.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings as necessary. The following embodiments are examples for explaining the present invention, and are not intended to limit the present invention to the following contents. The present invention can be implemented with appropriate modifications within the scope of the gist thereof.

With the electronic device with a stretchable transmission line having water-stopping property of the present invention,
As a first aspect,
A transmission line outlet that is provided in a casing of an electronic device with a stretchable transmission line wound around at least one resin-coated conductor wire around a core made of a water-impermeable elastic body Inserted into the internal circuit, the gap between the elastic transmission line and the transmission line outlet is water-stopped by a resin water stop, with the elastic transmission line in the water stop as one end, When the stretchable transmission line having the other end not in the water stop portion is extended 0.5 times the initial breaking extension rate, the outer diameter change rate of the core material in the water stop portion is ± 5%. It is an electronic device with a stretchable transmission line characterized by being within. FIG. 1 schematically shows a typical example.
As a second aspect,
An electronic device in which a stretchable transmission line wound by at least one resin-coated conductor wire is connected around a core made of a water-impermeable elastic body, the housing of the electronic device A space partitioned by the casing surface and a waterproof inner wall is formed inside the body, and the stretchable transmission line is taken out from the transmission line outlet 1 provided on the casing surface. The expansion / contraction is inserted into the opening 2 and connected to an internal circuit, and the gap between the elastic transmission line and the transmission line outlet 2 is stopped by a resin water-stopper and is in the space. An electronic device with a stretchable transmission line, wherein a part of the flexible transmission line is fixed in the casing. FIG. 2 schematically shows a typical example.

The elastic body having a surface and a cross section through which water does not permeate in the present invention is represented by a solid rubber string made of, for example, silicon rubber, EPDM rubber, fluorine rubber, chloroprene rubber, polyurethane rubber, NBR, natural rubber, Even a foamed rubber string having closed cells may be one in which the end of the tube is fixed with resin to prevent water from entering.
The core material is preferably one having a stretchability of 10% or more, more preferably 50% or more, still more preferably 100% or more, and particularly preferably 300% or more.

The conductor wire as used in the present invention refers to a copper wire, an aluminum wire, a wire rod whose metal surface is subjected to metal plating to enhance electrical conductivity, a wire rod containing carbon nanotubes, etc., a wire material that can conduct electricity, and an optical fiber that transmits light Etc.

These conductor wires are required to have a waterproof resin coating layer as a conductor thin wire or a collection of conductor fine wires from the viewpoint of water stopping.

In the stretchable transmission line of the present invention, the conductor wire is wound around the core material, and the conductor wire is preferably wound in a spiral shape.
The conductor wire may be bonded to the core member or may be wound in a state where it is not bonded. Further, the conductor wire may be wound along the groove by forming a spiral groove in the core material.
Moreover, the conductor wire may coat | cover at least one part around a conductor wire with the insulating fiber. Constraining or covering the conductor wire with the insulating fiber is preferable because it has a feature that the conductor wire can be protected and the stretchability is hardly hindered.
Transmission lines that are made by passing insulating fibers alternately inside (core material side) and outside the conductor wires and restraining the conductor wires can keep the distance between the conductor wires constant even if it is repeatedly expanded and contracted. There is an effect of becoming difficult. Furthermore, there is an effect that the signal transmission property is improved by keeping the distance between the conductor wires constant. In addition, as described above, insulating fibers may be alternately passed through the inside and outside of the conductor wire to restrain the conductor wire, and the above-described coating layer may be further disposed on the outer periphery thereof.

The electronic device of the present invention means a device having a circuit driven by electricity or a circuit for converting an external stimulus into an electric signal. The electronic device of the present invention also includes an internal component (so-called harness) in which the conductor wire terminal is attached to the connector terminal. In any case, it is necessary to have a housing. The casing is made of a waterproof material.

In the present invention, the water stop portion refers to a transmission water outlet at which the elastic transmission line according to the present embodiment connected to the above circuit is taken out from the inside of the casing of the electronic device. The part which has given water-stopping by.

The water stop has an elastic core material in the transmission line outlet, and at least one conductor wire is wound around the outer periphery. Further, the transmission line outlet (inside the casing) For example, the resin is filled between the conductor wire and the core material, or between the core material or conductor wire and the transmission line outlet. That is, resin is filled in the gaps between the materials constituting all the water stop portions, and the water is thereby stopped. When there are a plurality of conductor wires, the conductor wires are also stopped by the resin water stop.
In addition, the transmission line outlet according to the present embodiment is provided from the surface of the casing to the inside or the inner wall of the casing, which will be described later, and the case where it is equal to the thickness of the outer diameter of the elastic transmission line. In some cases, the transmission line is made thinner than the outer diameter of the transmission line so that the transmission line can be fitted into the narrowed portion (for example, a groove shape).

As described above, one aspect of the electronic device with a stretchable transmission line according to the present embodiment is formed by surrounding at least one resin-coated conductor wire around the core made of a water-impermeable elastic body. The rotated elastic transmission line is inserted into the transmission line outlet provided in the housing of the electronic device and connected to the internal circuit, and the gap between the elastic transmission line and the transmission line outlet is resin-stopped. When the elastic transmission line outside the housing is stretched 0.5 times the initial breaking elongation rate, the rate of change in the outer diameter of the core material of the water-stopping portion is within ± 5%. is there.

The change rate of the outer diameter of the core material is preferably within ± 2%, and most preferably the diameter does not change. This value is obtained by the method described later.
It is particularly preferable that the core material does not change in diameter even when it is stretched to 0.7 times the initial breaking elongation, more preferably 0.9 times.
When the elastic transmission line is stretched at 0.5 times the initial breaking elongation rate, if the core material diameter of the water stop portion is reduced, a gap is formed at the interface between the core material and the conductor wire, resulting in loss of water stoppage. Therefore, the object of the present invention cannot be achieved.

Even if the outer diameter of the stretchable transmission line is controlled within the above range in the water stop portion according to this embodiment, if the stretch force due to the stretch propagates to the core material and the core material of the water stop portion is repeatedly stretched, the core There may be a gap at the interface between the material and the constituent material, resulting in loss of water stoppage.
In order to prevent the above problems from occurring, when the stretchable transmission line is stretched 0.5 times the initial breaking elongation rate, the gap between the core material of the water stop portion and other constituent materials The deviation may be within 5 mm, more preferably within 2 mm, and most preferably no deviation occurs.

Thus, when the elastic transmission line is stretched by 0.5 times the initial breaking elongation rate, the change rate of the outer diameter of the core material of the water stop portion is within ± 5%, or the core material of the water stop portion In order for the gap between the other constituent materials to be within 5 mm, in the water stop portion according to the present embodiment, the outer diameter of the core material is set to a predetermined outer diameter (the outer diameter of the core material when relaxed * √ {1 /((100+0.2 times the initial breaking elongation) / 100)}) or less, more preferably, the outer diameter of the core material * √ {1 / ((100 + 0.0 of the initial breaking elongation). 5 times) / 100)} or less, more preferably, the outer diameter of the core material is a predetermined outer diameter (the outer diameter of the core material when relaxed * √ {1 / ((100 + 0.7 times the initial elongation at break)). ) / 100)}) The following is to make it thinner.
When the outer diameter of the core material is reduced to less than or equal to the outer diameter of the core material * √ {1 / ((100 + 0.2 times the initial breaking elongation) / 100)}, the outer coating is also tightened. Is less likely to expand and contract, and there is also an effect of suppressing the force that the expansion / contraction force at the time of expansion / extension of the elastic transmission reaches the water stop.

The method for reducing the outer diameter of the core material of the water stop portion is not particularly limited. For example, a heat-shrinkable tube is attached to the elastic transmission line and the core material is reduced by heat shrinking, or the elastic transmission line is attached. The elastic transmission line is caulked with a caulking tool in advance, and the outer diameter of the core material is reduced to a predetermined outer diameter (the outer diameter of the core material when relaxed * √ {1 / ((100 + 0.2 times the initial elongation at break)) / 100)}) The following method, or by stretching the elastic transmission line in advance and relaxing the outer diameter of the core material to the outer diameter of the core material * √ {1 / ((100 + 0.2 times the initial elongation at break) ) / 100)} A method of thinning to be equal to or less than the above, and by stretching the elastic transmission line to relax the outer diameter of the core material, the outer diameter of the core material * √ {1 / (((100 + initial break elongation)) (0.2 times the rate) / 100)} If you prepare a product that is thinned below and put it in a transmission line outlet with a narrower opening News and the like method the elastic transmission line is extended 0.2 times or more of the initial breaking elongation mounting a heat shrinkable tube (How to resin molding).
As a method of reducing the outer diameter of the core material of the water stop part, after extending the elastic transmission line, thinning the core material with a heat shrink tube with hot melt resin in the inner layer, or pre-elastic transmission A method in which a hot melt resin is applied on the wire and then heated by covering with a heat-shrinkable tube is also preferably used.
In both the relaxed state and the stretched state of the stretchable transmission line, heat it with a heat-shrinkable tube with hot melt resin interposed, and use a caulking tool with the tube shrunk before cooling is completed. The core material can be further thinned by caulking the heat shrinkable tube portion.
By pulling the core material with the conductor and covering material most tightly near the center in the length direction of the stretchable transmission line near the waterstop, pulling to the waterstop when the stretchable transmission line is extended Force can also be suppressed. Such a structure can be obtained by changing the winding speed and winding tension when creating the elastic transmission line. Moreover, when using the elastic | stretch transmission line which has the outer coating | cover which consists of a hot melt fiber, it can shrink | contract by applying heat from the outside, and can tighten | tighten the coating | covering material more.

Thus, by making the outer diameter of the core material smaller than the predetermined outer diameter in advance, it is possible to maintain a state in which the diameter of the core material on the inner side is not further deformed even when the elastic transmission line is pulled. Even with the extension, for example, a gap between the core material and the conductor wire or the transmission line outlet does not occur. 5 and 6 illustrate this effect. FIG. 5A illustrates a case where the stretchable transmission line according to the present invention is subjected to water stop treatment at the transmission line outlet without being made thinner than the predetermined outer diameter and is attached to an electronic device. . In this case, when the stretchable transmission line is extended, the core material is also reduced accordingly, and a gap is generated between the core material and the surrounding material (FIG. 5B). On the other hand, as shown in FIG. 6 (a), when a water stop treatment is performed at the transmission line outlet in a state where the elastic transmission line is made thinner than the predetermined outer diameter in advance, the transmission line becomes an electron. Even if it is stretched after being connected to the device, it is not further thinned and no gap is generated, so that the desired water-stopping property is ensured (FIG. 6B).

When the elastic transmission line according to the present embodiment is sandwiched between the transmission line outlets provided on the housing or the inner wall, the diameter (D1) of the core material at the time of elongation of 0.5 times the initial breaking elongation rate is set at the time of relaxation. The outer diameter of the core material * √ {1 / ((100 + 0.2 times the initial breaking elongation) / 100)}, and the diameter of the thin wire having a diameter equal to or smaller than the total diameter obtained by adding the conductor wire thickness (d) to this It is preferable to insert (pinch) into the transmission line outlet, and even if the elastic transmission line expands and contracts, keep the core material diameter change rate within the target range (that is, the core material outer diameter change rate is within ± 5%) can do.
If the outer coating layer is further included, the core diameter can be expanded or contracted by being sandwiched by a transmission line outlet having a diameter equal to or smaller than the minimum thickness (t) obtained from the weight per unit cross section of the outer coating layer. Can be within the target range.

The second aspect of the electronic device with a stretchable transmission line in the present embodiment is a stretch that is wound around at least one resin-coated conductor wire around a core material made of a water-impermeable elastic body. An electronic device to which a flexible transmission line is connected, wherein a space partitioned by the casing surface and a waterproof inner wall is formed inside the casing of the electronic device, and the stretchable transmission line is formed on the casing surface. It is inserted from the provided transmission line outlet 1 to the transmission line outlet 2 provided on the inner wall, and further connected to an internal circuit, and the gap between the stretchable transmission line and the transmission line outlet 2 is made of resin. The electronic device with a stretchable transmission line is characterized in that it is water-stopped by a waterstop and a part of the stretchable transmission line in the space is fixed in the casing.
FIG. 2 schematically shows a typical example. A space is provided between the transmission line outlet 1 and the outlet 2, and a part of the elastic transmission line in the space is fixed to the housing. The space is partitioned within the housing by a waterproof inner wall and a waterproof housing surface.
The method for fixing the elastic transmission line to the housing in the space is not particularly limited. For example, a part of the transmission line is made larger (thicker) than the diameter (size) of the outlet 1. And the thickened part can be fixed by bringing it into contact with the outlet.
In addition, as a method of thickening the stretchable transmission line in the middle part, a method of tying and stretching the stretchable transmission line using a caulking tool, an insulation lock, a heat shrinkable tube, a string, and a wire can be mentioned. There is also a method of making the middle part thick by making a knot on the elastic transmission line itself.

Further, as a method of fixing the stretchable transmission line to the casing in the space, there is a method in which a protrusion is provided in the casing and the stretchable transmission line is tied to the protrusion and fixed.
When the stretchable transmission line according to the present embodiment is connected to an electronic device in the manner as described above, even if the transmission line is pulled from the outside of the electronic device, the stretchable transmission line is in the internal space. Because the wire diameter (size) is fixed by providing a knot that is larger (thicker) than the diameter (size) of the transmission line outlet 1 or because it is fixed by a protrusion in the housing, The stress concentrates at the transmission line outlet 1 and the stress (stretching force) does not propagate to the core material of the stretchable transmission line at the transmission line outlet 2, so that the thinning does not occur. A gap with the surrounding material does not occur and water stoppage is ensured.

When thickening the elastic transmission line, the core material cannot be achieved if the core material is displaced due to expansion or contraction. Therefore, the core material outer diameter at the time of relaxation * √ {1 / ((100 + 0.2 times the initial elongation at break)) / 100)} It is preferable to caulk with an oak tool, insullock, string or wire, or crimp these while pulling an elastic transmission line, or attach a heat-shrinkable tube so that it becomes thinner below. On top of that, it is necessary to thicken the elastic transmission line. By these methods, the force exerted on the entire constituent material can be reduced, so that it is difficult for a deviation to occur between the constituent materials. The knot is more preferable because it can be easily made without using other tools.

The water stop part of the present invention is formed by filling a resin between all the materials constituting the water stop part.
The constituent material of the water stop part is a transmission line outlet provided in the housing of the electronic component and at least one elastic transmission line (including a conductor line and a core material, and in some cases, an external coating layer). The water stop portion is formed by filling a gap between the transmission line outlet of the electronic component and the elastic transmission line with a resin water stop. At this time, when there are a plurality of gaps between the conductor wires and the core material and a plurality of conductor wires, the gaps between the conductor wires are also filled with resin. Depending on how the conductor wire is wound, there may be a gap between the transmission line outlet and the core of the transmission line. In this case, the gap is also filled with resin and stopped. .
The resin can be filled by a method of injecting from the outside, a method of filling the resin material constituting the water stop portion by deformation, or a combination thereof.

When injecting the resin, it is desirable that the resin easily penetrates into the gaps between the core material, which is a constituent member of the stretchable transmission line, and the conductor wire or the outer coating layer. For this purpose, there is a method using a low-viscosity resin.
When the stretchable transmission line has a fiber layer, it is difficult for the resin to penetrate. Therefore, a method using a lower viscosity resin or a method of reducing the fiber layer in advance will be recommended.

As the low-viscosity resin, general resins such as thermosetting, thermoplasticity, activating energy (UV, electron beam, etc.) curable, moisture curable, chemical reaction curable, and the like can be used. As the resin to be used, the above resins and adhesives may be used alone, or a plurality of them may be mixed. The resin used here needs to penetrate sufficiently to the conductor wire, core material, outer coating layer, etc. constituting the stretchable transmission line, so a water-stopper with high viscosity or high surface tension is sufficient to stop the resin. Water may not be available. Therefore, the viscosity before curing is desirably a low viscosity of 50 Pa · s or less. The viscosity of the water-stopper during processing is preferably 40 Pa · s or less, more preferably 30 Pa · s, and particularly preferably 10 Pa · s or less. The lower limit is 0.01 Pa · s. If the viscosity is lower than this, the resin may adhere to a place other than the place where the waterstop is to be formed, which is not preferable. When using a low-viscosity resin, it is possible to solve the problem by limiting the amount of resin to be injected in advance, or placing a high-viscosity resin in a place where you do not want to infiltrate in advance. I can do it.
When the viscosity of the resin is as high as 50 Pa · S or higher, the water-stopping agent may not sufficiently permeate into the gaps such as the conductor wire, the core material, and the outer coating layer constituting the stretchable transmission cable. At this time, in order to impart fluidity to the water-stopping agent, there are methods such as increasing the temperature of the water-stopping agent, increasing the injection pressure of the water-stopping agent, and mixing chemicals and solvents that increase the flowability.
In order to be able to process with a resin having a relatively high viscosity, the amount of fibers can be reduced in advance or the fibers can be thermally melted to reduce voids between the fibers.

When the elastic transmission line having the fiber layer as the outer coating layer is stopped, the resin is easily filled by removing the fiber layer or melting or dissolving the fiber layer. Also, the fiber layer is usually composed of multifilaments, but it is also effective to use monofilaments in order to reduce the gaps between the fibers.
The fiber layer can be removed by cutting with scissors or nippers or irradiating with a laser.
The heat-meltable fiber layer can be melted by applying heat with hot tweezers or a heat gun. It can also be dissolved using a solvent according to the type of fiber.

A method of sandwiching with a hot plate such as hot tweezers is preferable because heat can be efficiently applied and fibers near the core are easily melted.
Moreover, this method can also apply pressure simultaneously, and has the effect of reducing the gap of the fiber layer and the effect of reducing the gap between the core material and the conductor wire.

In the said water stop part, a fiber layer reduces and it becomes easy to fill resin by the space | gap between fibers reducing. Furthermore, if a state in which the core material and / or the conductor wire is deformed by pressure and heat is created, a gap between the conductor wire and the core material is reduced, and waterproofing is facilitated.
In forming the waterstop, one with a short processing time is preferable, and as a representative example, an adhesive mainly composed of cyanoacrylate, which is frequently used as a so-called instantaneous adhesive, or a hot melt resin is recommended.
When cyanoacrylate is used, the stretchable transmission line is held in a horizontal state in the air, and the target amount can be dropped to allow the resin to penetrate into the intended range. Since cyanoacrylate has low viscosity and easily penetrates, it easily penetrates to the interface with the core material. When the cyanoacrylate resin is dropped in a state where the stretchable transmission line is extended, a water-stopping portion can be formed in a state where the portion to which the resin is attached is cured and the core material is thinned.
In any case, the water-stopping portion can be formed by water-stopping the inside of the elastic transmission line with a cyanoacrylate adhesive and then covering the outside with a heat-shrinkable tube with resin. In this way, the water stop part becomes the same as the resin tube, so by attaching the water stop part to the housing with hot melt resin, sandwiching it in the case, or insert molding with the case, It becomes easy to integrate with the housing.
On the other hand, when a hot melt resin is used, if the elastic transmission line includes a fiber layer, it is difficult for the hot melt resin to penetrate into the fiber layer. Therefore, it is recommended to dissolve the fiber layer in advance.

Since the fiber layer in the vicinity of the core is the least soluble, it is preferable to efficiently apply heat with hot tweezers or the like to dissolve it. For example, in the case where a conductor wire is constrained or covered with polyester fiber or nylon fiber, the fiber layer can be dissolved by applying heat at 300 ° C. or higher for 1 second to 60 seconds. If the heat treatment time is short, the heat melting is incomplete, and if it is long, the outer coating may be burned or the coated portion of the conductor wire may be deteriorated.
In applying heat, when the elastic transmission line is extended, the heat is easily transferred to the inside, and the fiber layer is easily dissolved.
For example, after melting the fiber layer using hot tweezers etc. in the stretched state, attach the heat shrink tube with hot melt resin under stretch, apply heat with a heat gun, shrink the heat shrink tube, The water stop portion can be formed by allowing the resin to penetrate inside.

When caulking the stretchable transmission line according to the present embodiment with a caulking tool to form a water stop, pressure is applied to all members constituting the transmission line, and either the resin or the core material that covers the conductor line is used. Since the softer one is deformed, the resin can be filled in the gap formed between the conductor wire and the core material.
The degree of caulking with a caulking tool should be determined from the sleeve-like shape (inner diameter, outer diameter) used for caulking and the caulking diameter shown on the caulking tool to determine the caulking condition that does not change the core diameter even if it is expanded or contracted. Can do. Caulking due to excessive force may break the resin coating of the conductor wire and cause a short circuit. After caulking, make sure that there is no short between each other and between the conductor wire and the sleeve. Good.

Resin may be injected after caulking between the caulking tool and the conductor.
In the case of using a stretchable transmission line having a fiber coating, it is possible to heat the outside of the crimped portion after caulking and heat the fiber to melt it into a resin, and then inject the resin.
Further, it may be caulked after injecting a resin between the conductor wire and the core material in advance. In order to make it difficult for gaps to occur in the inner wall of the sleeve, a resin that is easily deformed may be applied to the outside of the elastic transmission line and then crimped with a caulking tool. For example, there is a method in which a sealing tape used as a sealing material is wound or a rubber tube or a heat shrinkable tube is interposed and then caulked.

When integrating the water-stop part formed by caulking the sleeve into the housing, if there is a concern about peeling of the metal-resin interface, the sleeve may be covered with a resin tube and then integrated with the housing. it can.

It is desired in the mass production process to easily realize the structure of the stretchable transmission line according to this embodiment as described above.
To achieve this, after stretching and filling the resin to the periphery of the core with a cyanoacrylate resin under elongation, a method of covering the exterior with a heat shrinkable tube with resin and forming a waterstop, Similarly, using hot tweezers under elongation, melt the fiber layer and cover with a heat-shrinkable tube with resin to form a waterstop, or after infiltrating the periphery of the cyanoacrylate resin into the core In order to make it easy to stop water between the elastic transmission line and the caulking tool, a method of forming a water-stopping caulking body with a caulking tool, a method of caulking with a caulking tool after melting the fiber layer with hot tweezers If a sealing tape is wrapped around a stretchable transmission line that has been treated with resin and then caulked with a caulking tool to form a water-stopper in advance, it is integrated with the housing in the same way as a general cable. Process and stop Part can be formed.
In the method of thickening the intermediate part, the fiber layer of the water stop part (inner wall side) is melted in advance with hot tweezers, or the resin is filled to the core part using a cyanoacrylate resin. A method in which the intermediate part is fixed to the housing by tying the intermediate part to the protrusion and the inner wall part is filled with hot-melt resin or integrated by insert molding is relatively easy and easy to mass-produce.

Hereinafter, the present invention will be described in detail based on examples and comparative examples, but the present invention is not limited to these examples. Measurement methods, evaluation methods, etc. are as follows.

(1) Stretchability Mark the stretchable transmission cable at 20cm intervals. Hold the outside with your hand and stretch it until the mark is 22cm, then relax and measure the length. The cables were distinguished according to the following criteria, and those that could be extended to 22 cm and recovered to less than 21 cm after relaxation (A) were judged to have 10% or more stretchability.
A: The cable can be stretched to 22 cm and recovered to less than 21 cm when relaxed.
B: The cable cannot be extended to 22 cm, or can be extended to 22 cm but does not recover to less than 21 cm even if it is relaxed.
(2) Initial fracture elongation rate The sample was stretched at a stretching speed of 200 mm / min with Tensilon (RTG-1210) at a specimen length (gripping length) of 200 mm, the rising angle of the SS curve was differentiated, and the differential value was When graphed on the axis, the initial elongation at break was determined from the value that changed from increasing to decreasing.
The initial elongation at break is the following formula:
Initial elongation at break = (sample length (mm) −200 when the differential value starts to decrease) / 200 × 100
Determined by
(3) Repeated expansion and contraction An electronic device was fixed to one side of the dematcher tester, the elastic conductive transmission line was held on the other side, and the elastic transmission line was expanded and contracted a predetermined number of times at a predetermined magnification and repeatedly expanded and contracted. After this repeated expansion and contraction, each characteristic was evaluated in the following (10).
(4) Waterstop model (casing model)
On the side of a polypropylene container (thickness 2 mm, width 6 cm * depth 5 cm * height 4 cm) as shown in the case model (FIG. 8) simulating an electronic device (or a case where a transmission line is taken out from the electronic device) A heat-shrinkable tube part or caulking tool part is attached to a groove part that is trapezoidally cut to a depth of 2 cm (opening 8 mm, bottom part width 4 mm), and the periphery of the groove is made of hot melt resin (product name: hot melt resin 7375, manufactured by 3M Company) What was buried and fixed was used as a housing model simulating a water stop.
In addition, the diameter of the core material in the stretchable transmission line outside the takeout part (other than the water stop part) was also measured in the same manner. This value was defined as the core material diameter (mm) of the stretchable transmission line outside the take-out part in the table.

(5) Cross-sectional diameter of waterstop core material Cut out the telescopic transmission line with a saw and nippers on the outer surface of the case model container wall, and observe the cut-out cross section with a microscope (VHX-500 KEYENS) Then, the major axis and the minor axis of the core material were measured, and the average value thereof was regarded as the core material diameter (this was done because the shape of the core material may be deformed when cutting).
(6) Measurement of rate of change of outer diameter of core material
Cut out the stretchable transmission line about 30cm, and fix it to the V-groove of the case model with the short side of the stretchable transmission line inside the container and the long side outside, about 8cm from one end. Was fixed to the diagonal wall of the container with clips so that the telescopic transmission line inside the container was not pulled and sagging (FIG. 8). After forming the water stop at the V-groove transmission line outlet under the conditions described in the examples, in this state, the covering of the stretchable transmission line and the conductor wire at the end of the water stop inside the container About 5 mm is removed so that the core material can be seen, and the outer diameter of the core material is observed and measured with a microscope (D1). Next, as shown in FIG. 8, the stretchable transmission line in the water stop portion is one end, the stretchable transmission line without the water stop portion outside the water stop portion is extended to a predetermined elongation rate, and is in an extended state. Then, the outer diameter of the core material is measured again using a microscope (D2).
From D1 and D2 determined above, the following formula:
Rate of change = (D1-D2) / D1 × 100 (%)
Then, the outer diameter change rate of the core material was obtained.
In addition, the outer diameter change rate of this core material was measured also about the thing after said expansion-contraction.
The pass / fail judgment of the outer diameter change rate was made according to the following criteria.
Judgment Outer diameter does not change ◎ (Pass)
Outer diameter change rate is less than 2% ○ (pass)
Outer diameter change rate is less than 5%.
Outer diameter change rate is 5% or more ×
Here, the change in the core material diameter on the container inside of the water stop portion means that the outer diameter of the core material inside the water stop portion also changes to the same extent. Considered a change in diameter.

(7) Judgment of misalignment of core material Cut the elastic transmission line inside the water stop part of the electronic device (or the housing model that imitates the part where the elastic transmission line is taken out from the electronic device), and hold the cut part Then, the stretchable transmission line (20 cm) outside the water stop portion was stretched to a predetermined stretch rate, and the distance to which the core material was drawn was observed. The deviation was determined from the distance drawn in as follows.
Pulled distance Lz (mm) Misalignment judgment Lz = 0 ◎
0 <Lz ≦ 2 ○ 2 <Lz ≦ 5 △
5 <Lz ×
(8) Water permeability of core material After disassembling the stretchable transmission line, one end side of the 15 cm core material taken out from the core material is immersed 3 cm in water as shown in FIG. It was bent with a helicopter and hung 8 cm outside and held for 10 minutes. When the transmission line was touched with the upper helicopter, the case where it was not wet and water did not leak from the other end was marked with ◯, and the case where one was observed was marked with x.
(9) Water-proof evaluation An electronic device equipped with one elastic transmission line including two or more conductor wires or an evaluation sample (housing model) is placed on a table as shown in FIG. The elastic transmission line including the part was cut at about 10 cm and naturally landed on the table. In this state, water was poured until the upper part of the transmission line was sufficiently immersed, and the transmission line was observed in the following time range to evaluate water-stopping.
Water leakage Leakage of water was observed within 5 minutes: ×
Leakage of water was observed in 5-60 minutes: △
No leakage of water was observed after 60 minutes: ○
(10) Evaluation after repeated expansion and contraction The electronic device with the elastic transmission line or the housing model with the transmission line was applied to a demacher tester and subjected to 0 to 40% predetermined expansion and contraction (100 times and 10,000 times). The evaluation result after repeated expansion and contraction was obtained by performing the outer diameter change of the core material, the deviation of the core material, and the water-stopping evaluation of the transmission line repeatedly expanded and contracted.

The elastic transmission lines used in the examples and comparative examples were obtained by using the core materials and conductor wires shown in Table 1 and the Osae yarn and the following special stringing machines to obtain transmission line intermediates.
The special stringer used here has the following mechanisms:
(1) Mechanism for supplying a core material;
(2) The core material is gripped along the shape of 8 in the V-groove of the two rolls having a plurality of V-grooves,
Feed mechanism;
(3) The core material is gripped along the shape of 8 in the V-groove of the two rolls having a plurality of V-grooves,
Winding mechanism;
(4) A mechanism for winding the conductor wire in parallel with the core material in a state where the core material is stretched, and (5) an inner side of the conductor wire in a direction opposite to the winding direction of the conductor wire in a state where the core material is stretched. And a 16-placing string making machine equipped with a mechanism for winding the leather yarn alternately through the outside.
While stretching the stretchable transmission line intermediate obtained above by 2.2 times, a 330 dt / 72f (150/36/2) ester wooly (150/36/2) wound around the transmission line intermediate in advance. By using 16 bobbins (manufactured by TAIRIIN) and winding at 130 T / M (twist / meter) to form an outer coating layer, an elastic transmission line according to the present invention was obtained. A water stop portion was formed on the stretchable transmission line, and the water stop performance was measured.

<Example of water stopping with heat shrinkable tube (Examples 1 to 3, Comparative Examples 1 and 2)>
Example 1
Cut out the elastic transmission line (A) about 30 cm, and rotate it about 3 cm at 350 ° C. for about 3 seconds using hot tweezers (small tip width 5 mm: Taiyo Denki Sangyo) at about 8 cm from one end. The fiber was dissolved three times repeatedly. From above, a heat-shrinkable tube with resin described in Table 2 (Sumitube SA2, manufactured by Sumitomo Electric Industries, Ltd.) was placed and shrunk with a heat gun. The above heat-shrinkable tube is formed in a groove that is cut into a trapezoidal shape up to a depth of 2 cm on the side of a polypropylene container (width 6 cm * depth 5 cm * height 4 cm) using this as a housing model. Attaching the part (with the short extension of the telescopic transmission line from the tube part inside the container and the longer one outside), the periphery of the groove is filled with hot melt resin (product name: hot melt resin 7375, manufactured by 3M) and fixed (FIG. 8).
The inside edge of the container was fixed with a clip to the diagonal wall of the container. At this time, the telescopic transmission line inside the container was stopped without being pulled and sagging.
(Example 2)
Example 1 except that both ends of the elastic transmission line (A) were pulled and stretched 50%, the fiber at a position of about 8 cm from one end was dissolved with hot tweezers, and the heat-shrinkable tube with resin was fixed. In the same manner as described above, the stretchable transmission line was attached to a polypropylene container.
(Comparative Example 1)
The stretchable transmission line was attached to a polypropylene container in the same manner as in Example 1 except that hot tweezers were not heat-treated.

Example 3
The stretchable transmission line (A) cut out by about 40 cm is almost horizontal in the air, and the fiber coating layer is not heat-treated around the position of about 8 cm from one end, and the cyanoacrylate adhesive (Aron Alpha product number # 04988) is used. Three drops of UNISHI Co., Ltd. were dropped, and the elastic transmission line was rotated and cured while maintaining almost horizontal in the air. After about 30 seconds, a heat-shrinkable tube with resin was fixed to the adhesive application part. In the same manner as in Example 1, the stretchable transmission line was fixed to a polypropylene container.
Example 4
Example 3 except that 3 drops of a cyanoacrylate adhesive was applied in a state where the stretchable transmission line (A) was extended by 50%, and a heat-shrinkable tube with resin was fixed to the adhesive application portion after about 30 seconds. In the same manner, the stretchable transmission line was fixed to a polypropylene container.
(Comparative Example 2)
All processes were performed in the same manner as in Example 2 except that the elastic transmission line (C) was used.

Table 2 shows the results of evaluation of Examples 1 to 4 and Comparative Examples 1 and 2 according to the evaluation method in which the water-stopping portion was in a state and the water-stopping property was previously determined.
From these results, even if the resin is filled, the core material diameter changes, and if the deviation occurs, the water-stopping property is lost. It can be seen that the water cannot be stopped if the material has water permeability.
In addition, it can be seen from the above results that it is more preferable that the outer diameter of the core portion is not changed even when the core portion is extended and the water stop portion is filled with resin.

<Examples in which the outer diameter does not change by caulking (Examples 5 to 8, Comparative Example 3)>
(Example 5)
The stretchable transmission line (A) is cut out about 30 cm, and the coating layer of the stretchable transmission line located about 8 cm from one end is heat-treated, and the cyanoacrylate resin described in Table 3 (above) 3 After about 30 seconds at 23 ° C, drop a sleeve (copper wire bare crimping sleeve (P-type PNT5 manufactured by Monotaro Co., Ltd.) on this position and tighten the caulking pressure with a scale 6 using a caulking tool. The transmission line thus obtained was attached to a groove portion of a polypropylene container in the same manner as in Example 1, and a hot melt resin (product name: hot melt resin 7375, 3M) It was buried and fixed.

(Examples 6 and 7)
The stretchable transmission line (A) is cut out about 30 cm, and the coating layer of the stretchable transmission line at a position of about 8 cm from one end is preheated (heated with a heat gun (Example 6), heated to 350 ° C. with hot tweezers. The fiber portion of the transmission line was melted using a heated one (Example 7)), and hot melt resin 7375 (viscosity shown in Table 3) was applied to this position, and then a sleeve (for copper wire) Stretchability after water-stopping treatment in the same manner as in Example 5 except that a bare crimping sleeve (P-type PNT5 manufactured by Monotaro Co., Ltd.) is used and a caulking tool is used to tighten the caulking pressure with a scale 6. The transmission line was fixed to a polypropylene container.
(Example 8)
Cut out the stretchable transmission line (A) about 30 cm, cut out a portion of the fiber coating layer of the stretchable transmission line located about 8 cm from one end in advance with scissors, and then heat it to 350 ° C with hot tweezers and transmit The stretchable transmission line after the water stop treatment was fixed to a polypropylene container in the same manner as in Example 6 except that the fiber part of the wire was dissolved.

(Comparative Example 3)
Cut out the stretchable transmission line (A) about 30 cm, heat-treat the coating layer of the stretchable transmission line at a position of about 8 cm from one end, and do not fill the resin at this position for sleeve copper wire A bare pressure-bonding sleeve (P-type PNT5, manufactured by Monotaro Co., Ltd.) was covered and tightened to a predetermined pressure (scale) shown in Table 3 using a caulking tool. In the same manner as in Example 1, the stretchable transmission line was attached to a groove portion of a polypropylene container, and the periphery thereof was filled with a hot melt resin (product name: hot melt resin 7375, manufactured by 3M) and fixed.

Table 3 shows the results of evaluating the water-stopping portions of Examples 5 to 8 and Comparative Example 3 and the water-stopping results according to the previously determined evaluation method.

<Examples in which the outer diameter does not change by caulking, and others (Examples 9 to 12)>
Example 9: Caulking without heat treatment of the fiber layer, and injecting resin from both ends of the caulked portion.
Example 10: In the same manner as in Example 9, both ends of the caulking tool are heat-treated and resin is injected from both ends.
Example 11: Caulking after heat-treating the fiber layer, and resin injection from both ends.
Example 12: The fiber layer was heat-treated and covered with a silicon tube, followed by caulking.
More specific description will be given below.
Example 9
Cut out the stretchable transmission line (A) about 30 cm, attach the sleeve (PNT5) to that position without heat-treating the coating layer of the stretchable transmission line at a position of about 8 cm from one end, with pressure (scale 6) Tightened. Next, the resin (cyanoacrylate) shown in Table 4 was filled from both ends of the sleeve portion, and the stretchable transmission line was attached to the groove portion of the polypropylene container in the same manner as in Example 1, and the periphery thereof was hot-melted. It was filled and fixed with a resin (product name: hot melt resin 7375, manufactured by 3M Company).
(Example 10)
Cut out the stretchable transmission line (A) about 30 cm, attach the sleeve (PNT5) to that position without heat-treating the coating layer of the stretchable transmission line at a position of about 8 cm from one end, with pressure (scale 6) Tightened. Next, both ends of the sleeve portion were heat-treated with a heat gun to heat-melt the fiber layer, and then both ends of the sleeve portion were filled with a resin (hot melt resin) shown in Table 4.
In the same manner as in Example 9, the stretchable transmission line after filling was fixed to a polypropylene container.

(Example 11)
Cut out the stretchable transmission line (B) about 30 cm, heat-treat the coating layer of the stretchable transmission line at a position of about 8 cm from one end with a heat gun as shown in Table 4, and then place the sleeve at that position. (PNT5) was attached and tightened at the position of the scale 6. Then, the hot-melt resin (Product name: Hot-melt resin 7375, 3M company make) of Table 4 was provided to the both ends of the said sleeve, and the water stop part was formed. In the same manner as in Example 1, the stretchable transmission line was attached to a groove portion of a polypropylene container, and the periphery thereof was filled with a hot melt resin (product name: hot melt resin 7375, manufactured by 3M) and fixed.
(Example 12)
Cut out the stretchable transmission line (B) about 30 cm, heat-treat the coating layer of the stretchable transmission line at a position of about 8 cm from one end with a heat gun as shown in Table 4, and seal at that position Wrap tape (Naflon (registered trademark) TOMBO No. 9082 manufactured by NICHIAS) in three layers, and then attach a sleeve (PNT5) to it, and tighten it from above the sleeve with caulking scale 6 as shown in Table 4 It was. While the both ends of the attached sleeve are not filled with resin, in the same manner as in Example 1, the stretchable transmission line is attached to the groove portion of the polypropylene container, and the periphery thereof is hot melt resin (product name: hot It was filled and fixed with a melt resin 7375 (manufactured by 3M).

Table 4 shows the evaluation results of the water-stopping properties of Examples 9 to 12 above.

<Examples (Examples 13 and 14, Comparative Examples 4 and 5) in which the outer diameter does not change when sandwiched by the casing>
A waterproof casing separated in the upper and lower parts in the center of the transmission line outlet 1 having an inner diameter of 2 to 3 mm, and an elastic transmission line sandwiched in a relaxed state, and then the upper and lower casings are bonded together. A product obtained by adhering the upper and lower housings after being sandwiched in a stretched state of% was prepared, and the resin was filled from the outside of the outlet 1. The details will be described below.
(Example 13)
Cut out the stretchable transmission line (A) about 30 cm, and heat-treat the stretchable transmission line coating at a position of about 8 cm from one end to the transmission line outlet 1 while stretching the stretchable transmission line by 50%. Set the upper and lower casings with the water-stopping agent 1 (adhesive (hot melt resin 7375)) shown in Table 5 while applying force so that there is no gap between the upper and lower casings. I fixed my body.
Here, the outer diameter of the extensible transmission line when sandwiched between the outlets 1 while extending 50% was larger than the size of the outlets (2 mm).
Thereafter, water-stopping agent 2 (cyanoacrylate) is injected from the outside of take-out port 1, and after 30 seconds or more, hot melt resin (water-stop agent 1) is filled around the take-out port to form a water-stop portion. did.
(Comparative Examples 4 and 5)
The diameter of the transmission line outlet 1 provided in the housing is 3 mm (Comparative Example 4) and 2 mm (Comparative Example 5), respectively, and the elastic transmission line when the elastic transmission line is sandwiched between the transmission line outlet 1 In the same manner as in Example 13, except that the water stop agent 2 is not extended and the water stop agent 2 is not injected from the outside of the take-out port 1, the water stop portion is formed by being sandwiched between the upper and lower cases.
In Comparative Example 5, the transmission line was not successfully sandwiched in the transmission line outlet 1 due to poor tightening of the elastic transmission line.
(Example 14)
Cut out the stretchable transmission line (A) about 30 cm, heat the coating layer with a heat gun without stretching the stretchable transmission line located about 8 cm from one end, and then remove the heat treatment section from the output of the housing A water stop portion was formed in the same manner as in Example 13 except that the water stop portion was set in the takeout portion.

Table 5 shows the evaluation results of the water-stopping properties of Examples 13 to 14 and Comparative Examples 4 and 5 described above.
In the evaluation, the upper wall of the housing is cut out.

Examples 15 to 18 are examples in which the diameter of the elastic transmission line is made larger than the diameter of the transmission line outlet 1.
As a housing of an electronic device, a transmission line outlet 1 is provided at the elastic transmission line outlet on the surface of the casing, and a space partitioned by a waterproof wall further having a transmission line outlet 2 is provided inside the casing. Thus, it is imagined that an electronic device with a telescopic transmission line is obtained in which the stretchable transmission line passes through the transmission line outlet 1 and the transmission line outlet 2 in the space.
In this structure, the upper surface of FIG. 2 corresponds to the upper lid, and the lower portion is divided into two cases, and a water stop is first formed in the lower case, and then the upper lid is adhered (the gap is 2), the structure of FIG. 2 is obtained. The transmission line is taken out from the transmission line 1 through the transmission line outlet 1, and the elastic transmission line is connected from the outlet 2 to an internal circuit or the like provided in the case.
The following example shows an example before attaching the top cover.
(Example 15)
The elastic transmission line (A) was cut out by 40 cm, and a sleeve (PNT8) was clamped with a mounting pressure (scale 10) at a position of about 8 cm from one end. After the outer side of the caulking part (the one with the shorter stretchable transmission line) is hot melted with hot tweezers (heated to 350 ° C.), the stretchable transmission line outside the casing of the takeout part 1 becomes longer, The part where this sleeve was attached was set between the transmission line outlets 1 and 2 (the distance between the outlets was 5 mm) so that the outside of the outlet 2 (inside of the housing) was shortened.
Furthermore, the resin described in Table 6 was infiltrated into the peripheral portion of the stretchable transmission line at the takeout port 2 to form a water stop portion. Even when the elastic transmission line is extended from the outside of the housing in this way, the extension stress is concentrated at the contact point between the end of the thickened portion and the transmission line outlet 1 so that the transmission line is not substantially extended and is not internally extended. Stretching force was not affected.

(Example 16)
(knot)
Cut out the stretchable transmission line (A) about 40 cm, make a knot about 8 cm from the end of one side, thicken the part, and then end one side (the length of the stretchable transmission line is shorter) The portion of the stretchable transmission line where no knot was formed was heated with hot tweezers to melt the fiber portion.
The distance between the transmission line outlets 1 and 2 (the distance between the outlets is so long that the elastic transmission line outside the casing of the extraction section 1 is long and the outside of the extraction section 2 (inside the casing) is short. 4 mm), this knot portion (outer diameter 4 mm) was set.
Furthermore, the resin described in Table 6 was infiltrated into the peripheral portion of the stretchable transmission line (fiber portion was thermally melted) set in the takeout port 2 to form a water stop portion.
Even if the elastic transmission line is extended from the outside of the housing in this way, the extension stress is concentrated at the contact point between the end of the knot and the transmission line outlet 1 so that the transmission line is not substantially extended to the inside. Stretching force was not applied.
(Example 17)
The elastic transmission line (A) is cut out by about 40 cm, and the distance between the transmission line outlets 1 and 2 is 3 mm, centering on the position of about 8 cm from one end, larger than the diameter of the outlet 1 A water-stop portion was formed in the same manner as in Example 16 except that the portion was thickened using an insulating material (width: 3 mm).

(Example 18)
A case having a protrusion between the outlets 1 and 2 similar to that in Example 15 is made, and a hot tweezers (as shown in Table 6) is positioned about 8 cm from one end of the elastic transmission line prepared in advance. The stretchable transmission line is connected to the protrusion so that the portion where the fiber layer is melted by heat treatment by heating to 350 ° C. is arranged in the transmission line outlet 2, and both ends thereof are taken out from the outlet 1. And set to 2.
Thereafter, the resin described in Table 6 was infiltrated into the peripheral portion of the stretchable transmission line (the fiber portion was thermally melted) set in the takeout port 2 to form a water stop portion.
Even if the elastic transmission line is extended from the outside of the housing in this way, the extension stress is concentrated at the contact point between the end of the knot and the transmission line outlet 1 so that the transmission line is not substantially extended to the inside. Stretching force was not applied.

Table 6 summarizes the results of water-stopping evaluation of Examples 15 to 18 described above.

The electronic device with a stretchable transmission cable having water-stopping properties of the present invention is useful as an electronic device with a cable that requires wiring expansion and contraction and waterproof performance.
For example, it is suitable for applications that are likely to get wet with sweat, such as a blue-two earphone, worn on the head and expected to infiltrate sweat or rain, or an EMS suit that moves while moving the body. used. Applications that are exposed to sweat and rain, such as LED lighted clothing, and portable devices such as AC adapters that can store wiring in a compact manner using telescopic wires, transmission lines are required to be stretchable. In addition, it can be used for any application that requires waterproofness of equipment.
Specific examples are listed below.
Examples of the wearable device include an income, a headset, a POS system headphone, an earphone, a sports earphone, a head mount display, and the like. As wiring for exchanging images, voice or text information with a transmitter or controller, devices such as devices using telescopic wires, wearable AEDs, wearable continuous biosignal measuring devices, etc. Devices such as underwear, outerwear, pants, bottom and other clothing provided with a sensor to be measured, equipment such as a belt, a halter electrocardiograph, and a measuring device.
In addition, underwear with various illuminations such as LEDs, clothing such as outerwear, pants, bottom, etc., electromyographs such as belts, electrocardiographs, electrocardiographs, internal electrodes such as flexible electrodes for the brain, blower (fan) Examples thereof include clothing, appliances, devices having a function of lowering body temperature such as Peltier elements, shoes such as heaters, clothing, appliances, devices having a function of keeping warming or heating, and smart textiles combining these.

In addition, the power generation mechanism (pressure, friction, electromagnetic induction) and power storage unit or equipment that moves using the power obtained by power generation, motion capture that measures exercise, work movement and body shape, motion controller for remote operation, A data glove etc. can also be mentioned.
It is also useful in so-called industrial robots such as rehabilitation for people with reduced motor function, assist suits developed for the purpose of reducing assistance and heavy labor, and nursing robots.
Examples of robots include industrial robots such as desktop robots and articulated robots, unmanned flying vehicles such as drones and unmanned vehicles, human body-mounted robots such as power assist, and biomimetic robots such as humanoid and snake robots. . Air compressors such as air cylinders and air chucks, switches and sensor devices such as pressure switches, motor equipment sequencers such as electric actuators and electric cylinder servo motors, semiconductors, electronic device laser processing machines, electric discharge Examples include processing machines such as processing machines. The elastic transmission line according to the present invention is effective as a wiring in a place with extension or water-stopping in any of the wirings connecting the devices in the FA device and its peripheral devices or between the devices.
In any of the devices, the electronic component with the stretchable transmission cable having the water-stopping property of the present invention is suitably used with respect to the periphery of the electronic component in terms of wiring extension and waterproof performance.

In addition, with respect to electronic devices with cables that are wired with a clearance in the movable part, by applying the electronic devices with elastic transmission lines having water-stopping properties of the present invention, wiring can be made shorter than before. Since disconnection due to expansion and contraction is difficult to occur and waterproof performance can be imparted, it can be used in a water environment. As described above, the stretchable transmission line according to the present invention can be applied to a product having a movable part shown below and having wiring in a device requiring waterproof performance or between devices.
Other than this, for example, cleaning equipment such as washing machines and dryers, refrigerators, shelf tableware dryers, rice cookers, electronic cookers such as microwave ovens and kitchen products, air conditioners such as air conditioners and stoves, vacuum cleaners, Cleaning equipment such as robot cleaners, recording and playback equipment such as DVD players and recorders and peripheral equipment, video photography equipment such as video cameras, digital cameras and surveillance cameras, video projectors such as TVs and projectors, mobile phones, tablets, Information home appliances such as personal computers and peripheral devices thereof, telephone and other communication devices and peripheral devices thereof, image reading and storage devices such as facsimiles and scanners, printing devices such as inkjet printers, main bodies such as stationary game machines and portable game machines, and A. Peripheral equipment, audio, etc. Equipment and peripheral equipment, musical instruments and peripheral equipment such as electric guitars, lighting equipment such as desk lamps and spotlights, health appliances such as weight scales and low frequency treatment equipment, beauty home appliances such as hair removers, hair irons, and hair dryers Appliances such as equipment, electric beds, massage machines, irons, chargers (charging cables, charging systems, etc.), watches, wristwatches, compressors, sewing machines, farm equipment, household robots, electric lifting and hanging doors, broadcast receivers, etc. Electric wiring parts in or between devices in electronic equipment application products, elevators and other elevators, sliding doors and revolving doors, wind power generators, welding equipment, press machines, excavators, etc. Car electronics such as machines, automobiles, in-vehicle sensors, motors, control units, rear camera Car multimedia products such as car and car mechatronics products, car multimedia products such as car navigation systems, aircraft, motorized vehicles such as bicycles with electric motors, heavy machinery such as cranes, space systems such as artificial satellites, infrastructure such as sanitary communications and wired communication systems Medical equipment such as amusement machines such as amusement equipment such as traffic related equipment, karaoke equipment, pachinko machines, game machines, amusement parks, scanning electron microscopes (SEM), oscilloscopes, etc. Equipment can also be listed.
Since these products have moving parts and the surroundings are assumed to be used in a water environment, the electronic equipment with the telescopic transmission line of the present invention, which has wiring extensibility and waterproof performance in any equipment, Is preferred.

The casing of the electronic device used in the present invention refers to a container, container, housing, or the like that accommodates an electronic component that covers part or all of the electronic component. Specifically, a known material such as metal, ceramics, waterproof plastic, resin, paper, rubber, or elastomer is formed by a processing method such as insert molding, potting, pressing, cutting, grinding, etc. Can be used in any combination of materials and shapes. For example, in the case of earphones, a small waterproof resin-like case that covers at least electronic parts to make it smaller, and a rubber-made rubber that is formed in the shape of an ear to give a fit feeling are used. Is done.

DESCRIPTION OF SYMBOLS 1 Core material 2 Conductor wire 3 Elastic transmission line 4 Case 5 Water stop part 6 Transmission line extraction part 1
7 Transmission line entry part 2
8 Inner wall 9 Part where elastic transmission line is fixed to the case 10 Case model

Claims (13)

1. A transmission line outlet that is provided in a casing of an electronic device with a stretchable transmission line wound around at least one resin-coated conductor wire around a core made of a water-impermeable elastic body Inserted into the internal circuit, the gap between the elastic transmission line and the transmission line outlet is water-stopped by a resin water stop, with the elastic transmission line in the water stop as one end, When the stretchable transmission line having the other end not in the water stop portion is extended 0.5 times the initial breaking extension rate, the outer diameter change rate of the core material in the water stop portion is ± 5%. Electronic device with elastic transmission line, characterized in that
2. The electronic device with a stretchable transmission line according to claim 1, wherein a gap between the conductor wire and the core material constituting the stretchable transmission line is stopped by the waterstop.
3. When the stretchable transmission line having one end of the stretchable transmission line in the waterstop portion and the other end not in the waterstop portion is stretched 0.5 times the initial breaking elongation rate, the conductor wire The electronic device with a stretchable transmission line according to claim 1, wherein a deviation between the core material and the core material is less than 5 mm.
4. In the water stop portion, the outer diameter of the core material of the stretchable transmission line is less than or equal to the outer diameter of the core material when relaxed * √ {1 / ((100 + 0.2 times the initial breaking elongation) / 100)}. The electronic device with a stretchable transmission line according to any one of claims 1 to 3, wherein the electronic device is a thinned product.
5. In the water stop portion, the outer diameter of the core material of the stretchable transmission line is set to the outer diameter of the core material when relaxed by a caulking tool * √ {1 / ((100 + 0.2 times the initial elongation at break) / 100) } The electronic device with a stretchable transmission line according to claim 4, which has been reduced to the following.
6. The diameter of the transmission line outlet is narrowed to a thickness equal to or less than the thickness of the elastic transmission line outer diameter * √ {1 / ((100 + 0.2 times the initial breaking elongation) / 100)} when relaxed. The electronic device with a stretchable transmission line according to any one of claims 1 to 3.
7. The electronic device with a stretchable transmission line according to any one of claims 1 to 4, wherein the water stop portion is formed in a state where the stretchable transmission line is stretched by 0.5 times or more of an initial breaking elongation rate. Manufacturing method.
8. An electronic device in which a stretchable transmission line wound by at least one resin-coated conductor wire is connected around a core made of a water-impermeable elastic body, the housing of the electronic device A space partitioned by the casing surface and a waterproof inner wall is formed inside the body, and the stretchable transmission line is taken out from the transmission line outlet 1 provided on the casing surface. The stretchable material is inserted through the opening 2 and connected to an internal circuit, and the gap between the stretchable transmission line and the transmission line outlet 2 is stopped by a resin waterstop and is in the space. An electronic device with a stretchable transmission line, wherein a part of the transmission line is fixed in the casing.
9. The electronic device with a stretchable transmission line according to claim 8, wherein a gap between the conductor wire and the core material constituting the stretchable transmission line is stopped by the waterstop.
10. 10. The electronic device with a stretchable transmission line according to claim 8 or 9, wherein a part of the stretchable transmission line is connected and fixed to a protrusion provided in the housing.
11. 10. The electronic device with a stretchable transmission line according to claim 8 or 9, wherein a knot is formed and fixed to a part of the stretchable transmission line.
12. The electronic device with a stretchable transmission line according to any one of claims 1 to 6, and 8 to 11, wherein at least a part of the periphery of the conductor wire is further covered with a fiber layer.
13. The electronic device with a stretchable transmission line according to claim 12, wherein at least a part of the fiber layer is melted or dissolved.

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