CN106571176A - Flexible lead wire and manufacture method therefor - Google Patents
Flexible lead wire and manufacture method therefor Download PDFInfo
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- CN106571176A CN106571176A CN201510651181.9A CN201510651181A CN106571176A CN 106571176 A CN106571176 A CN 106571176A CN 201510651181 A CN201510651181 A CN 201510651181A CN 106571176 A CN106571176 A CN 106571176A
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Abstract
The invention provides a flexible lead wire and belongs to the field of stretchable electronics. The flexible voice coil lead wire disclosed in the invention comprises at least one group of sub-conductors; each sub-conductor comprises an ultra soft elastic layer, a carbon nanotube layer and a metal layer; three structure layers are curled and twisted into a wire shape. The flexible lead wire is advantaged by high strength, stretchable performance, distortable performance and anti-fatigue performance; a new solution can be provided for a conventional voice coil lead wire.
Description
Technical field
The present invention relates to stretchable person in electronics, finger more precisely, a kind of stretchable flexible lead wire of resisting fatigue.
Background technology
In general, lead refers to the wire outwards drawn from component package body.In surface-assembled components and parts, refer to the general designation of the outer leads such as gull wing lead, J-lead, I shape leads.Fuse cord for the explosive that ignites also is named " lead " sometimes, is chemical material, to be distinguished.
On some components and parts, such as voice coil loudspeaker voice coil of speaker, traditional lead is all to be twisted together to constitute by many metals, and during vibrations, lead can also bending repeatedly to voice coil loudspeaker voice coil occur.But the anti-fatigue performance of metal lead wire is poor, suppleness is all very limited, therefore the easy fatigue fracture during bending repeatedly, affects the work of whole speaker.See Fig. 1：The voice coil loudspeaker voice coil and lead of Japanese great Hei companies production, wherein 1 is voice coil loudspeaker voice coil, 2 is lead.
In recent years the stretchable electronics for just having risen, are that people bring completely new concept and experience.Stretchable flexible wire can complete the task that many rigid metal wires cannot be completed, such as artificial medical device, intelligent clothing, biomimetic material etc..Flexible wire has good buckling performance, excellent stretching shrinkage, therefore anti-fatigue performance is very good.For example, using stretchable resisting fatigue flexible wire, using among loudspeaker voice coil connecting line or lead-out wire, steady operation can be still kept during the vibrations repeatedly of voice coil loudspeaker voice coil, even in big Forging Process, this is that traditional stranded wire lead is difficult to.
The content of the invention
In view of more than, the present invention provides a kind of flexible lead wire, the lead have the advantages that high intensity, it is stretchable, can distort, bend-resistance, resisting fatigue, another kind scheme can be provided for voice coil leads now.
A kind of flexible lead wire（Reference explanation book accompanying drawing 2）, including：Least one set sub-conductor 21.
The sub-conductor 21, including at least three parts, elastic layer 211, carbon nanotube layer 212, metal level 213, refers to Figure of description 3.Elastic layer 211 is using white oil 80-85% and ultra-soft rubber sebs10-15%, and a small amount of Pulvis Talci, adhesive are mixed；The elastic layer made using the method has fabulous tensility energy, and drawing coefficient reaches 1400%, is one of most long material of draw ratio in current quality of rubber materials.Carbon nanotube layer 212 adopts single armed CNT, both arms CNT or multi-walled carbon nano-tubes；CNT itself has excellent mechanical property and light quality so that the wire is extremely gently and with tough structure.Metal level 213 is using the material that density is less and conductivity is higher, such as copper, aluminum or their alloy.
The manufacture method of above-mentioned sub-conductor is：（1）Elastic layer is stretched to certain multiple, for example：1-14 times；（2）Carbon nanotube layer is covered on elastic layer under extended state, covering method can be：Sputtering, spraying, evaporation etc.；（3）Conductive metal layer is covered on carbon nanotube layer, covering method can be：Sputtering, spraying, evaporation etc.；（4）The former length of product recovery for completing will be covered, curling twisting twists into wire；Twisting can be for clockwise, it is also possible to counterclockwise.Twisting angle（I.e. when sub-conductor is in upright position, unit rotates the incline direction of the helix to be formed around axle center）It is preferred that 45 degree to 75 degree.
When above-mentioned sub-conductor 21 is combined as flexible lead wire 2, can many composition fascicular textures that are parallel to each other, it is also possible to mutually reverse composition and twist shape structure.
Compared with prior art, the voice coil loudspeaker voice coil flexible lead wire that the present invention is provided has advantages below：Because voice coil leads include ultra-soft gum elastic stratiform structure and CNT stratiform structure, the structure has fabulous flexibility and bend-resistance performance, therefore the intensity and bend-resistance performance of whole voice coil leads are effectively raised, makes voice coil leads that fracture to be less likely to occur；Because the flexible voice coil leads metal conducting layer is covered on carbon nanotube layer, and carried out twisting process, more preferable intensity and bend-resistance performance are made it have, while the metal level and carbon nanotube layer all have electric conductivity, can more effectively transmitting telecommunication number；And either metal level or carbon nanotube layer occur in that fatigue fracture, a floor in addition can substitute continuation transmitting telecommunication number each other so that voice coil loudspeaker voice coil still can be continuing with, so as to extend the working life of whole speaker；The voice coil leads weight opposing metallic lead quality mitigates, and voice coil loudspeaker voice coil load is less, and the interference that voice coil loudspeaker voice coil is subject to when shaking is less, and the phenomenon of speaker sounding distortion is greatly mitigated.
The flexible wire provides the solution different from the plain conductor on conventional meaning, simultaneously can be used for the guidewire uses such as other sensors, driver.So, according to the present invention done the present invention spirit in other purposes, all should the present invention include within the scope of.
Description of the drawings
Fig. 1. certain model voice coil loudspeaker voice coil and lead schematic diagram of Japanese great Hei companies production, wherein 1 is voice coil loudspeaker voice coil, 2 is voice coil leads.
Fig. 2. a kind of flexible lead wire embodiment according to the present invention, wherein 7 groups of sub-conductor parallel group fasciculation structures.
Fig. 3. sub-conductor is constituted structural representation when twisted wire is constructed with helically twisted canoe.
Fig. 4. the present embodiments relate to sub-conductor making step schematic diagram.
Fig. 5. illustrate the curling twining steps of sub-conductor manufacturing process with the blank sheet of paper of width 1cm.
Fig. 6. the present embodiments relate to scanning electron microscope (SEM) photograph of the sub-conductor under former long and extended state.
Fig. 7. carbon nanotube layer according to the present invention uses mechanical laying method schematic diagram.
Fig. 8. the present embodiments relate to sub-conductor extension at break multiple test data, the former long 1cm of sub-conductor.
Fig. 9. bending fatigue test data figure in the embodiment of the present invention.
Specific embodiment
The flexible voice coil loudspeaker voice coil wire of the embodiment of the present invention is described in detail below with reference to Figure of description.
Figure of description 1, Fig. 2 is refer to, the embodiment of the present invention provides a kind of flexible voice coil loudspeaker voice coil wire, can be used for the speaker coil structures shown in Fig. 1, and the voice coil loudspeaker voice coil wire includes at least one group of sub-conductor 21.The present embodiment refers to Fig. 2 using 7 groups of sub-conductors of preferable data.7 groups of sub-conductors 21 are closely joined together according to fascicular texture is parallel, and the high molecular bonding with bio-compatibility such as ultra-soft rubber or high-purity silicone rubber is adopted where its is hollow.The diameter 0.1-3mm of the sub-conductor 21.
Certainly, the arrangement mode of above-mentioned sub-conductor 21 can also adopt the torsion twisted wire structure of mutual spiral winding, please also refer to accompanying drawing 3 in addition to pencil is arranged in parallel；The left figure of accompanying drawing 3 is seven share wire spiral winding schematic diagrams, and right figure is photo sectional drawing.
The preparation of the voice coil leads 2 is gone through the motions substantially（See also Figure of description 6）：
1）Using 80-85% white oils, 10-15% thermoplastic rubber sebs, and a small amount of Pulvis Talci, adhesive 1-5%, after hot melt stirs, extrusion molding generates ultra-soft elastic layer 211, and ultra-soft flexible core thickness is about 0.1-3mm, and width is less than 5cm；The present embodiment makes thickness 1mm, and width is 1cm；
2）Ultra-soft elastic layer 211 prepared by step 1 according to needed for wire draw ratio to former long 1-14 times, preferred multiple is 6-14 times, the present embodiment selection multiple is 10 times.The flexible core of original thickness 1mm stretches 10 times afterwards, and thickness is about 0.2-0.3mm.Then CNT m layers are laid on flexible core after the stretch, m is Arabic numerals, and scope is 1-200；Preferred CNT number of plies m scope is 20-80.Number of stories m=20 that the present embodiment is chosen.After laying is finished, a small amount of ethanol is dripped on CNT, CNT is all infiltrated, can reach the effect that CNT is brought into close contact with flexible core.Ether used in this step can also be substituted with other organic solvents, and such as ethanol, methanol, acetone, chloroform, dichloroethanes etc., organic solvent plays a part of under the surface tension effects produced when being and volatilizing, and CNT is combined closely by Van der Waals force.Described axial resistivity is all arranged parallel to elastic layer axial direction.
3）Carbon nanotube layer 212 is laid under the extended state of elastic layer 211 to finish, and finally covers conductive metal layer 213 again on carbon nanotube layer 212.Conductive metal layer thickness is about 1-100 microns, 213 layers of the present embodiment, 50 microns of coating thickness.The rubber layer primarily serves two big effects：One is and carbon nanotube layer together transmitting telecommunication number, plays electric action；Two is that, if lead occurs in that fatigue fracture during shaking repeatedly, a floor in addition can substitute continuation transmitting telecommunication number each other so that voice coil loudspeaker voice coil still can be continuing with, so as to extend the working life of whole speaker.
4）The above-mentioned membrane structure for completing is recovered into former long, according to elastic layer 211 under, conductive layer 213 is crimped twisting to membrane structure in the state of upper, twists into wire.Twisting can be for clockwise, it is also possible to counterclockwise.Twisting angle（I.e. when sub-conductor is in upright position, unit rotates the incline direction of the helix to be formed around axle center）It is preferred that 45 degree to 75 degree.The present embodiment adopts preferred 60 degree.Cut and remove the uneven sub-conductor two ends of the curling number of plies that causes of twisting process, remaining part is uniform one group of sub-conductor 21.The step for refer to Figure of description 5, accompanying drawing 5 is that a length of a film 20cm, the virgin paper sheet of width 1cm crimp twisting process photo, can class be pushed into the curling twisting process of the step.
5）Above-mentioned steps complete the making of a root wire, repeat above step and make remaining 6 with sub-conductor.Voice coil leads 2 can be finally given by 7 using after gluing with sub-conductor.The material of the adhesive is not limited, preferred compatibility good ultra-soft rubber, medical adhesive etc.；The present embodiment adopts homemade ultra-soft rubber.
Above-mentioned making step it may be noted that it is following some：
The carbon nanotube layer 212 includes at least one layer of CNT（m=1）.CNT herein can be single armed CNT, can also be double-walled or multi-walled carbon nano-tubes.Laid number of stories m numerical value is bigger, and the prepared conductivity of sub-conductor 21 is better.But it is limited to CNT elasticity and can not show a candle to flexible core 211, so when laying carbon pipe number of stories m numerical value is bigger, the draw ratio of sub-conductor 21 of preparation is less, and anti-fatigue performance is poorer, preferred CNT number of plies m scope is 20-80.
Described carbon nanotube layer 212, elastic layer stretches at least more than 5 times during making, carbon nanotube layer and conductive layer are prepared after completing, when being punctured into former long, carbon nanotube layer can form the cycle fold of large period and minor cycle in vertical and horizontal, and the cycle fold can make the sub-conductor maintain resistance to be basically unchanged when significantly stretching is shunk.Refer to the scanning electron microscope (SEM) photograph of accompanying drawing 6.
The laying method of the CNT of carbon nanotube layer 212 is as follows described in above-mentioned steps 2：Carbon nanotube layer is prepared by a carbon nano pipe array, and the carbon nano pipe array needs orientations in the same direction substantially.First, multiple CNTs are chosen from carbon nano pipe array using the adhesive tape or a needle point of one fixed width to stretch outward, CNT is stretched along the array carbon nanotube direction of growth is actually perpendicular to certain speed, described multiple CNTs progressively disengage the substrate of carbon nano pipe array with pulling force effect lower edge draw direction, and in the presence of Van der Waals, selected multiple CNTs are made to join end to end respectively at other adjacent CNTs, pull straight, be uniformly layed on elastic layer 211.It is side by side pencil non-distorted structure that above-mentioned CNT is parallel；Certainly, may also be employed distorting the twisted wire structure of winding；The carbon nano tube line of the torsion prepares the Chinese invention patent description of the CN100500556C that can be found in June, 2009 bulletin.
In the present embodiment, the laying of carbon nanotube layer is manually operable, and also can be laid using mechanical type.Mechanical laying method schematic diagram refer to the attached drawing 7, using two motors（Play motor effect）, it is coaxial to rotate at the same speed in the same direction, carbon nano-tube film can be uniformly layed on elastic layer 211,212 carbon nanotube layers are formed, the 212 CNT Rotating fields for now being formed are parallel non-distorted structure.Such as according to distortion twisted wire structure, only two motors coaxially need at the same speed be rotated backward.The method is extended to from the technique spirit that can work out fiber, only need to slightly be improved and be laid suitable for the carbon nanotube layer of the invention.
It is arranged in parallel for pencil by 7 groups of sub-conductors that the flexibility that the present embodiment makes leads 2.The flexible voice coil leads that the present embodiment finally gives have passed through following test：
1st, extension at break multiple test, data are shown in Fig. 8.The former long 10mm of test sample, ruptures when being stretched to about 150mm, and the electrode wires elongation at break that the present embodiment is obtained is 1500%.The data have surmounted current flexible wire almost all kinds of on the market.
2nd, bending testing fatigue, data are shown in that 9. examples of accompanying drawing have done 5000 full bendings, will electrode wires bending extremely can not again roll over state, test resistance change shows that resistance change rate is less than 5%, it is shown that the fabulous warping resistance performance of the material.
4th, scanning electron microscope (SEM) photograph, is shown in that the present embodiment of accompanying drawing 6. has done the scanning electron microscope (SEM) photograph of 212 layers of sub-conductor carbon nanotube layer, electron microscope when 3 pictures are respectively former long, 5 times of elongations and 10 times of elongations.
Test except more than, the present embodiment has done a large amount of aggravating activitieses, bending+stretching+distortion simulation experiment for made lead.Digital signal shown by embodiment is almost completely unaffected, and is also fully demonstrated by the excellent properties that the voice coil leads possess.
To sum up, the voice coil loudspeaker voice coil flexible lead wire that the present invention is provided has advantages below：Because voice coil leads include ultra-soft gum elastic stratiform structure and CNT stratiform structure, the structure has fabulous flexibility and bend-resistance performance, therefore the intensity and bend-resistance performance of whole voice coil leads are effectively raised, makes voice coil leads that fracture to be less likely to occur；Because the flexible voice coil leads metal conducting layer is covered on carbon nanotube layer, and carried out twisting process, more preferable intensity and bend-resistance performance are made it have, while the metal level and carbon nanotube layer all have electric conductivity, can more effectively transmitting telecommunication number；And either metal level or carbon nanotube layer occur in that fatigue fracture, a floor in addition can substitute continuation transmitting telecommunication number each other so that voice coil loudspeaker voice coil still can be continuing with, so as to extend the working life of whole speaker；The voice coil leads weight opposing metallic lead quality mitigates, and voice coil loudspeaker voice coil load is less, and the interference that voice coil loudspeaker voice coil is subject to when shaking is less, and the phenomenon of speaker sounding distortion is greatly mitigated.
The flexible wire provides the solution different from the plain conductor on conventional meaning, simultaneously can be used for the guidewire uses such as other sensors, driver.So, various equivalent modifications can be to do other changes according to technical solution of the present invention, the change done according to technical solution of the present invention, all should be included within the scope of the technical program protects.
Claims (4)
1. a kind of flexible voice coil leads, including：One conductor structure, the wire includes least one set sub-conductor；
Characterized in that, the voice coil leads include at least three parts：Ultra-soft elastic layer, carbon nanotube layer and metal level；Three-decker curling twisting, twists into wire.
2. flexibility voice coil leads as claimed in claim 1, it is characterised in that the lead includes that many root wires are mutually reversed and constitutes twisted wire structure, or the composition fascicular texture that is parallel to each other.
3. flexibility voice coil leads as claimed in claim 1, it is characterised in that carbon nanotube layer, metal level merge as conductive unit；Carbon nanotube layer adopts SWCN, double-walled or multi-walled carbon nano-tubes.
4. flexibility voice coil leads as claimed in claim 1, it is characterised in that the preparation method of sub-conductor is：（1）Elastic layer is stretched to certain multiple, for example：1-14 times；（2）Carbon nanotube layer is covered on elastic layer under extended state；Covering method adopts usual manner, for example：Sputtering, spraying, evaporation；（3）Conductive metal layer is covered on carbon nanotube layer, covering method adopts usual manner, for example：Sputtering, spraying, evaporation；（4）The former length of product recovery for completing will be covered, curling twisting twists into wire；Twisting can be for clockwise, it is also possible to counterclockwise；Twisting angle（I.e. when sub-conductor is in upright position, unit rotates the incline direction of the helix to be formed around axle center）It is preferred that 45 degree to 75 degree.
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| CN201510651181.9A CN106571176A (en) | 2015-10-10 | 2015-10-10 | Flexible lead wire and manufacture method therefor |
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| CN201510651181.9A CN106571176A (en) | 2015-10-10 | 2015-10-10 | Flexible lead wire and manufacture method therefor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114108152A (en) * | 2021-11-30 | 2022-03-01 | 武汉纺织大学 | Preparation method of multilayer structure composite yarn with strain sensing and stable tensile resistance |
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| CN101976594A (en) * | 2010-08-31 | 2011-02-16 | 中国科学院苏州纳米技术与纳米仿生研究所 | Composite conductor application of carbon nano tube fiber and preparation method thereof |
| CN204066767U (en) * | 2014-04-23 | 2014-12-31 | 北京富纳特创新科技有限公司 | Carbon nano-tube compound wire |
| CN104700945A (en) * | 2015-02-10 | 2015-06-10 | 江南石墨烯研究院 | Flexible pacemaker electrode wire capable of being stretched and twisted |
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2015
- 2015-10-10 CN CN201510651181.9A patent/CN106571176A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090194313A1 (en) * | 2008-02-01 | 2009-08-06 | Tsinghua University | Coaxial cable |
| CN101976594A (en) * | 2010-08-31 | 2011-02-16 | 中国科学院苏州纳米技术与纳米仿生研究所 | Composite conductor application of carbon nano tube fiber and preparation method thereof |
| CN204066767U (en) * | 2014-04-23 | 2014-12-31 | 北京富纳特创新科技有限公司 | Carbon nano-tube compound wire |
| CN104700945A (en) * | 2015-02-10 | 2015-06-10 | 江南石墨烯研究院 | Flexible pacemaker electrode wire capable of being stretched and twisted |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114108152A (en) * | 2021-11-30 | 2022-03-01 | 武汉纺织大学 | Preparation method of multilayer structure composite yarn with strain sensing and stable tensile resistance |
| CN114108152B (en) * | 2021-11-30 | 2023-02-07 | 武汉纺织大学 | Preparation method of multilayer structure composite yarn with strain sensing and stable tensile resistance |
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