TWI410146B - Bobbin and loudspeaker having the same - Google Patents

Abstract

The invention relates to a bobbin. The bobbin is a hollow pipe structure. The pipe structure is made of a layered carbon nanotube structure. The layered carbon nanotube structure includes a carbon nanotube film structure and an amorphous carbon structure. The carbon nanotube film structure defines a plurality of microspores. The amorphous carbon structure includes a plurality of amorphous carbon embedded in the macrospores. The invention also relates to a loudspeaker having the bobbin.

Description

Voice coil bobbin and speaker with the voice coil skeleton

The present invention relates to a voice coil bobbin and a speaker having the voice coil bobbin.

A typical electric speaker typically includes a voice coil, a voice coil bobbin, a magnetic field system, and a diaphragm. The magnetic field system has a magnetic field gap filled with a constant magnetic field, and the periphery of one end of the voice coil bobbin is fixed to the voice coil. The voice coil bobbin is received in a magnetic field gap in the magnetic field system, and the other end of the voice coil bobbin is fixed to the diaphragm. When the voice coil receives an audio signal, the voice coil moves along its axial direction under the magnetic field in the magnetic field gap, thereby pushing the diaphragm through the voice coil bobbin to perform piston movement, thereby pushing the surrounding air to generate sound waves. Moreover, the voice coil generates a large amount of thermal energy when moving in the magnetic field gap, resulting in an increase in the temperature of the voice coil. It can be seen from the action of the voice coil skeleton that the ideal voice coil skeleton should be able to withstand the high temperature generated by the voice coil, can not hinder the vibration of the diaphragm, and is not easily deformed or even damaged when subjected to high frequency vibration. That is, the voice coil skeleton should have the characteristics of high temperature resistance, light weight and high specific strength, so as to withstand high frequency and high power audio signals.

The traditional voice coil skeleton is usually made of materials such as kraft paper and polymer. Due to material limitations, the voice coil skeleton is difficult to balance high specific strength, low quality and high temperature resistance. For example, a voice coil skeleton prepared by a polymer is not resistant to high temperature and generally has a relatively large weight, and a voice coil skeleton prepared by using kraft paper has a specific strength which is not large enough.

In view of the above, it is necessary to provide a voice coil bobbin having high temperature resistance, light weight, and high specific strength, and a speaker having the voice coil bobbin.

A voice coil skeleton, which is a hollow tubular structure formed by a layered carbon nanotube composite structure. The layered carbon nanotube composite structure comprises a carbon nanotube film structure and an amorphous carbon structure. The carbon nanotube membrane structure has a plurality of micropores. The amorphous carbon structure includes a plurality of amorphous carbons filled in the micropores.

A voice coil skeleton, wherein the voice coil skeleton is a hollow tubular structure formed by a layered carbon nanotube composite structure, and the layered carbon nanotube composite structure is composed of a carbon nanotube membrane structure and an amorphous carbon composite.

A voice coil skeleton, which is a hollow tubular structure formed by a layered carbon nanotube composite structure. The layered carbon nanotube composite structure comprises an amorphous carbon structure and a plurality of carbon nanotubes. The plurality of carbon nanotubes are disposed in the amorphous carbon structure in the form of a self-supporting carbon nanotube film structure. The amorphous carbon structure is combined with the complex carbon nanotubes by van der Waals forces and covalent bonds.

A speaker includes a bracket, a magnetic field system, a voice coil, a voice coil skeleton, a diaphragm, and a centering piece. The magnetic field system, the voice coil, the voice coil bobbin, the diaphragm, and the centering piece are fixed by the bracket. The voice coil is received in the magnetic field system and disposed on the outer surface of the voice coil bobbin; one end of the vibrating membrane and the centering piece is fixed to the bracket, and the other end is fixed to the voice coil bobbin. The voice coil skeleton is a hollow tubular structure formed by a layered carbon nanotube composite structure. The layered carbon nanotube composite structure comprises a carbon nanotube film structure and an amorphous carbon structure. The carbon nanotube membrane structure has a plurality of micropores. The amorphous carbon structure includes a plurality of amorphous carbons filled in the micropores.

Compared with the prior art, the carbon nanotube membrane structure and the amorphous carbon used in the voice coil skeleton are carbon materials, and the carbon material has good high temperature resistance and small density, so the carbon nanotube And the voice coil skeleton made of amorphous carbon has good high temperature resistance and small quality. At the same time, since the carbon nanotube itself has excellent mechanical properties, the carbon nanotube film structure formed by the plurality of carbon nanotubes has excellent mechanical properties; and the amorphous carbon is dispersed in the carbon nanotube film. In the structure, the compactness of the layered carbon nanotube composite structure and the bonding force between the carbon nanotubes can be increased, and the specific strength of the layered carbon nanotube composite structure is further increased. Therefore, when the voice coil skeleton vibrates, the deformation, stress and tension formed by the vibration can be completely transmitted or shared to each of the carbon nanotubes and the amorphous carbon, so that the voice coil bobbin has a good specific strength.

100, 200‧‧‧ speakers

110, 210‧‧‧ bracket

111‧‧‧ Cavity

112‧‧‧ bottom

113‧‧‧ center hole

120, 220‧‧‧ magnetic field system

121‧‧‧Magnetic lower plate

122‧‧‧Magnetic upper plate

123‧‧‧ magnet

124‧‧‧magnetic core column

125‧‧‧ Magnetic field gap

130, 230‧‧ ‧ voice coil

140, 240‧‧‧ voice coil skeleton

141‧‧‧Nano carbon nanotube membrane structure

1411‧‧‧Nano Carbon Tube

1412‧‧‧Micropores

142‧‧‧Amorphous carbon structure

1421‧‧‧Amorphous carbon

150, 250‧‧‧ vibrating membrane

160, 260‧‧‧ centering piece

1 is a schematic structural view of a speaker according to a first embodiment of the present invention.

2 is a cross-sectional structural view of the speaker of FIG. 1.

FIG. 3 is a schematic structural view of a voice coil bobbin in the speaker of FIG. 1.

Figure 4 is a side view of the layered carbon nanotube composite structure in the voice coil skeleton of Figure 3.

FIG. 5 is a schematic cross-sectional view of the layered carbon nanotube composite structure in the voice coil skeleton of FIG. 4 taken along the V-V direction.

Fig. 6 is a schematic view showing the structure of a speaker according to a second embodiment of the present invention.

The invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 and FIG. 2 , a first embodiment of the present invention provides a speaker 100 including a bracket 110 , a magnetic field system 120 , a voice coil 130 , a voice coil bobbin 140 , and a The diaphragm 150 and the centering piece 160 are provided. The magnetic field system 120, the voice coil 130, the voice coil bobbin 140, the vibrating membrane 150, and the centering support 160 are fixed by the bracket 110. The voice coil 130 is disposed on an outer surface of one end of the voice coil bobbin 140 and is housed in the magnetic field system 120 together with the voice coil bobbin 140. One end of the diaphragm 150 and the centering piece 160 is fixed to the bracket 110, and the other end is fixed to the voice coil bobbin 140.

The bracket 110 is a truncated cone structure with an open end and a cavity 111 and a bottom portion 112. The cavity 111 accommodates the diaphragm 150 and the centering piece 160. The bottom portion 112 also has a central aperture 113 for nesting the magnetic field system 120. The bracket 110 is relatively fixed to the magnetic field system 120 by the bottom portion 112.

The magnetic field system 120 includes a magnetically permeable lower plate 121, a magnetically permeable upper plate 122, a magnet 123, and a magnetic core post 124. The opposite ends of the magnet 123 are respectively concentrically disposed by the magnetically permeable lower plate 121 and magnetically permeable. The upper plate 122 is clamped. The magnetically permeable upper plate 122 and the magnet 123 are both annular structures, and the magnetically permeable upper plate 122 and the magnet 123 enclose a cylindrical space in the magnetic field system. The magnetic core stud 124 is received in the cylindrical space and passes through the central hole 113. The magnetic core stud 124 extends from the magnetically permeable lower plate 121 to the magnetic conductive upper plate 122 and forms an annular magnetic field gap 125 with the magnet 123 for accommodating the voice coil 130. The magnetic field gap 125 has a constant magnetic field of a certain magnetic induction density. The magnetic field system 120 is fixed to the bottom portion 112 by the magnetic conductive upper plate 122, and the connection method thereof may be screwing, mating fixing, bonding, or the like. In this embodiment, the magnetic conductive upper plate 122 and the bottom portion 112 are fixed by screwing.

The voice coil 130 is received in the magnetic field gap 125, which is a driving unit of the speaker 100. The voice coil 130 is formed by winding a thin wire on the voice coil bobbin 140. Preferably, the wire is an enameled wire. When the voice coil 130 receives the audio signal, the voice coil 130 generates a magnetic field that varies with the audio current, and the changed magnetic field and magnetic field gap 125 The interaction between the constant magnetic fields forces the voice coil 130 to vibrate.

Referring to FIG. 3 , the voice coil bobbin 140 is a hollow tubular structure formed by a layered carbon nanotube composite structure, and the voice coil bobbin 140 is disposed concentrically with the magnetic core stud 124 and spaced apart from the magnetic core. The post 124 is partially received in the magnetic field gap 125. The outer surface of the voice coil bobbin 140 is fixed to the voice coil 130, and is fixed to a center position of the vibrating membrane 150 away from one end of the magnetic field system 120. When the voice coil bobbin 140 vibrates with the voice coil 130, the vibrating membrane 150 is caused to vibrate, so that the air around the vibrating membrane 150 is expanded to generate sound waves. Referring to FIG. 4 and FIG. 5, the layered carbon nanotube composite structure includes a carbon nanotube film structure 141 and an amorphous carbon structure 142.

The carbon nanotube membrane structure 141 includes a plurality of carbon nanotubes 1411 and micropores 1412 formed by the plurality of carbon nanotubes. Specifically, the adjacent carbon nanotubes 1411 are combined by van der Waals force to form the self-supporting carbon nanotube film structure. The complex amorphous carbon 1421 (Amorphous carbon) is combined by a covalent bond to form an amorphous carbon structure 142. The so-called "self-supporting structure" means that the carbon nanotube film structure 141 can maintain its own specific shape without being supported by a support. Since the large number of carbon nanotubes 1411 in the self-supporting carbon nanotube film structure 141 are attracted to each other by the van der Waals force, the carbon nanotube film structure 141 has a specific shape to form a self-supporting structure. The carbon nanotube film structure 141 may be a film-like structure formed by at least one carbon nanotube film. When the carbon nanotube film structure 141 includes a plurality of carbon nanotube films, the plurality of carbon nanotube films are laminated. Set, the adjacent carbon nanotube membrane is combined by van der Waals force. The carbon nanotube film can be a carbon nanotube film, a carbon nanotube film or a carbon nanotube film.

The carbon nanotube film structure 141 may include at least one carbon nanotube film, the carbon nanotube The drawn film is a self-supporting carbon nanotube film obtained by directly pulling from the carbon nanotube array. Each carbon nanotube film comprises a plurality of carbon nanotubes 1411 arranged substantially parallel and parallel to the surface of the carbon nanotube film. Specifically, the plurality of carbon nanotubes are connected end to end by van der Waals force and are arranged in a preferred orientation substantially in the same direction. It can be understood that since the large number of carbon nanotubes 1411 in the self-supporting carbon nanotube film are attracted to each other by Van der Waals forces and are connected end to end by Van der Waals force, the carbon nanotube film is made specific. Shape to form a self-supporting structure. The carbon nanotube segments have any width, thickness, uniformity, and shape. The thickness of the carbon nanotube film is 0.5 nm to 100 μm, and the width is related to the size of the carbon nanotube array for pulling the carbon nanotube film, and the length is not limited. The specific structure of the carbon nanotube drawn film and the preparation method thereof can be found in U.S. Patent Application Serial No. TW096105016, filed on Feb. 12, 2007. To save space, reference is made only to this, and all technical disclosures of the application are also considered as part of the disclosure of the present application.

When the carbon nanotube film structure 141 comprises a plurality of laminated carbon nanotube film laminated, a preferred angle between the adjacent two layers of carbon nanotube film forming a cross angle α is formed between the carbon nanotubes. , α is greater than or equal to 0 degrees and less than or equal to 90 degrees. a gap between the plurality of carbon nanotube films or between adjacent carbon nanotubes in a carbon nanotube film, thereby forming a plurality of micropores 1412 in the carbon nanotube film structure 141, The pores 1412 have a pore size of less than about 10 microns.

The carbon nanotube membrane structure 141 can be a carbon nanotube flocculation membrane, and the carbon nanotube membrane is a self-supporting carbon nanotube membrane obtained by flocculation of a carbon nanotube raw material. The carbon nanotube flocculation membrane comprises carbon nanotubes 1411 which are intertwined and uniformly distributed. The length of the carbon nanotube 1411 is greater than 10 microns, preferably 200 to 900 microns, thereby enabling The carbon nanotubes are entangled with each other. The carbon nanotubes 1411 are attracted to each other by the van der Waals force to form a network structure. Since the large number of carbon nanotubes 1411 in the self-supporting carbon nanotube flocculation membrane are attracted to each other and entangled by van der Waals force, the carbon nanotube flocculation membrane has a specific shape and forms a self-supporting shape. structure. The carbon nanotube film is isotropic. The carbon nanotubes 1411 in the carbon nanotube flocculation membrane are uniformly distributed and randomly arranged to form a large number of micropores 1412, and the pores of the micropores 1412 are less than about 10 micrometers. The length and width of the carbon nanotube film are not limited. In the carbon nanotube flocculation film, the carbon nanotubes 1411 are intertwined with each other, so the carbon nanotube flocculation film has good flexibility and is a self-supporting structure, which can be bent and folded into any shape without rupture. The area and thickness of the carbon nanotube flocculation membrane are not limited, and the thickness is from 1 micrometer to 1 millimeter, preferably 100 micrometers. The specific structure of the carbon nanotube flocculation film and the preparation method thereof are described in Taiwan Patent Application No. TW096116824, which was filed on May 17, 2007 by the same. To save space, reference is made only to this, and all technical disclosures of the application should also be considered as part of the technical disclosure of the present application.

The carbon nanotube membrane structure 141 can be a carbon nanotube rolled membrane, which is a self-supporting carbon nanotube membrane obtained by rolling a carbon nanotube array. . The carbon nanotube rolled film comprises a uniformly distributed carbon nanotube 1411, and the carbon nanotubes 1411 are arranged in a preferred orientation in the same direction or in different directions. The carbon nanotubes in the carbon nanotube rolled film partially overlap each other and are attracted to each other by the van der Waals force, so that the carbon nanotube film structure 141 has good flexibility and can be bent and folded. In any shape without breaking. Moreover, since the carbon nanotubes 1411 in the carbon nanotube rolled film are attracted to each other by the van der Waals force, the carbon nanotube film is a self-supporting structure. The carbon nanotube 1411 and shape in the carbon nanotube rolled film The surface of the growth substrate of the carbon nanotube array forms an angle β, wherein β is greater than or equal to 0 degrees and less than or equal to 15 degrees, and the angle β is related to the pressure applied to the carbon nanotube array, and the greater the pressure, the greater the pressure The smaller the angle, the carbon nanotubes in the carbon nanotube rolled film are preferably aligned parallel to the growth substrate. The carbon nanotube rolled film is obtained by rolling a carbon nanotube array, and the carbon nanotubes in the carbon nanotube rolled film have different arrangement forms according to the manner of rolling. Specifically, the carbon nanotubes 1411 may be disorderly arranged; when rolled in different directions, the carbon nanotubes 1411 are preferentially oriented in different directions; when rolled in the same direction, the carbon nanotubes 1411 are in a fixed direction. Preferred orientation. The length of the carbon nanotube 1411 in the carbon nanotube rolled film is greater than 50 microns. The specific structure of the carbon nanotube rolled film and the preparation method thereof are described in Taiwan Patent Application No. TW96116824, which was filed on May 11, 2007. To save space, reference is made only to this, and all technical disclosures of the application should also be considered as part of the technical disclosure of the present application.

The area and thickness of the carbon nanotube rolled film are not limited, and can be selected according to actual needs. The area of the carbon nanotube rolled film is substantially the same as the size of the carbon nanotube array. The thickness of the carbon nanotube film is related to the height of the carbon nanotube array and the pressure of the rolling, and may be 1 micrometer to 1 millimeter. It can be understood that the larger the height of the carbon nanotube array and the lower the pressure applied, the greater the thickness of the prepared carbon nanotube rolled film; on the contrary, the smaller the height of the carbon nanotube array, the more the applied pressure Large, the smaller the thickness of the prepared carbon nanotube rolled film. There is a gap between adjacent carbon nanotubes in the carbon nanotube rolled film, thereby forming a plurality of micropores 1412 in the carbon nanotube rolled film, and the pore size of the micropores 1412 is less than about 10 micrometers.

When the carbon nanotubes 1411 are arranged in a regular order, in the direction in which the carbon nanotubes are arranged The carbon nanotube film can fully utilize the large strength and Young's modulus of the carbon nanotube 1411 axial direction, so that the carbon nanotube film has a large strength along the direction in which the carbon nanotube 1411 is arranged. And Young's modulus. Therefore, the strength and Young's modulus of the voice coil bobbin 140 in different directions can be changed according to the position and direction of the voice coil bobbin 140, which is required to increase the strength and the Young's modulus, by changing the direction in which the carbon nanotube film is disposed. Adapt to the needs of different speakers.

The amorphous carbon structure 142 includes a plurality of amorphous carbons 1421 filled in the micropores of the carbon nanotube film structure 141 and uniformly distributed in the micropores. Or the amorphous carbon 1421 is distributed in the gap between the plurality of carbon nanotubes. Further, the plurality of amorphous carbon 1421 is distributed on the wall of the carbon nanotube or coated on the surface of the carbon nanotube. In the present embodiment, the amorphous carbon structure 142 further includes a plurality of amorphous carbons 1421 disposed on both sides of the carbon nanotube film structure 141 to form two amorphous carbon layers. That is, the carbon nanotube film structure 141 is completely coated by the amorphous carbon structure 142 and is composited inside the amorphous carbon structure 142.

The amorphous carbon 1421 and the carbon nanotubes are bonded to each other by a van der Waals force and a covalent bond. Specifically, the covalent bond includes an sp ² or sp ³ bond formed between carbon-carbon atoms. The plurality of amorphous carbons 1421 in the amorphous carbon structure 142 are bonded to each other by a covalent bond, that is, a plurality of amorphous carbons 1421 filled in the micropores and a plurality of particles disposed on both sides of the carbon nanotube film structure 141. Amorphous carbon 1421 is bonded by a covalent bond and forms a unitary structure. Specifically, the covalent bond includes an sp ² or sp ³ bond formed between carbon-carbon atoms. Therefore, from a macroscopic point, the amorphous carbon structure 142 is a sponge-like structure, and the carbon nanotube film structure 141 is buried therein. In other words, the plurality of carbon nanotubes 1411 are disposed in the amorphous carbon structure 142 in the form of a self-supporting carbon nanotube film structure 141, and the amorphous carbon structure 142 and the plurality of carbon nanotubes 1411 pass through Devalli and covalent bonds are combined.

The amorphous carbon 1421 is one of carbon materials, and its external structure is not limited, but its internal structure has the same crystal structure as graphite, however, the layered structure formed by the hexagonal annular plane of carbon atoms is disorderly and irregular. . The amorphous carbon 1421 includes bone char, carbon black, and the like. The amorphous carbon 1421 can be obtained by low-temperature carbonization of a polymer material such as polyacrylonitrile fiber, pitch fiber, viscose or phenolic fiber. In the present embodiment, the amorphous carbon 1421 is produced by carbonizing the polyacrylonitrile fiber at about 1000. Further, the method for preparing the layered carbon nanotube composite structure comprises the following steps: First, a polymer material is formulated into a solution form and infiltrated into the carbon nanotube film structure 141, the polymer material and the nanometer. The carbon nanotubes in the carbon film structure 141 can be combined by a covalent bond and a van der Waals force. Secondly, the carbon nanotube treatment infiltrates the carbon nanotube film structure 141 of the polymer material solution, so that the polymer material loses part of nitrogen, hydrogen and oxygen to form an amorphous carbon structure 142, and the nano carbon film structure 141 is wrapped. Buried in it. The amorphous carbon structure 142 is a unitary structure, and a part of the amorphous carbon structure 142 is filled in the carbon nanotube film structure 141; a part of the amorphous carbon 1421 is disposed on the carbon nanotube film structure 141. side.

The diaphragm 150 is a sounding unit of the speaker 100. The shape of the diaphragm 150 is not limited, and is related to its specific application. For example, when the diaphragm 150 is applied to the large speaker 100, the diaphragm 150 may be a hollow and inverted cone structure; when the diaphragm 150 is applied When the micro-vibration film 150 is used, the vibrating film 150 may have a disk-like structure. In the embodiment, the vibrating membrane 150 is a hollow and inverted cone structure, and the top end or the center thereof is fixed to the voice coil bobbin 140 by bonding. The outer edge of 150 is movably coupled to the bracket 110.

The centering piece 160 is a undulating ring structure composed of a plurality of concentric rings. The inner edge of the centering piece 160 is sleeved on the voice coil bobbin 140 for supporting the voice coil bobbin 140. The outer edge of the centering piece 160 is fixed to one end of the bracket 110 near the center hole 113. The centering piece 160 has a large radial rigidity and a small axial rigidity, so that the voice coil 130 can freely move up and down in the magnetic field gap 125 without lateral movement, avoiding the voice coil 130 and the magnetic field system 120. touch.

The carbon nanotube membrane structure and the amorphous carbon in the voice coil skeleton are carbon materials, and the carbon material has good high temperature resistance and small density, so the carbon nanotube and amorphous carbon are used. The voice coil skeleton has good high temperature resistance and small quality. At the same time, since the carbon nanotube itself has excellent mechanical properties, the carbon nanotube film structure formed by the plurality of carbon nanotubes has excellent mechanical properties; and the amorphous carbon is dispersed in the carbon nanotube film. In the structure, the compactness of the layered carbon nanotube composite structure and the bonding force between the carbon nanotubes can be increased, and the specific strength of the layered carbon nanotube composite structure is further increased. Therefore, when the voice coil skeleton vibrates, the deformation, stress and tension formed by the vibration can be completely transmitted or shared to each of the carbon nanotubes and the amorphous carbon, so that the voice coil bobbin has a good specific strength.

Referring to FIG. 6 , a second embodiment of the present invention provides a speaker 200 including a bracket 210 , a magnetic field system 220 , a voice coil 230 , a voice coil bobbin 240 , a diaphragm 250 , and a centering piece 260 . The magnetic field system 220, the voice coil 230, the voice coil bobbin 240, the diaphragm 250, and the centering piece 260 are fixed by the bracket 210. The voice coil 230 is disposed on an outer surface of one end of the voice coil bobbin 240 and is housed in the magnetic field system 220 together with the voice coil bobbin 240. One end of the diaphragm 250 and the centering piece 260 is fixed to the bracket 210, the other end is fixed on the voice coil bobbin 240.

The voice coil bobbin 240 is a hollow cylindrical structure made of a carbon material including a plurality of carbon nanotubes and a plurality of amorphous carbons. The plurality of carbon nanotubes form a carbon nanotube film structure, and the plurality of amorphous carbons form an amorphous carbon structure. The carbon nanotube film structure comprises a plurality of nano carbon line-like structures, and the plurality of carbon-carbon line structures form a one-sided carbon nanotube film structure by weaving or the like. Part of the amorphous carbon in the amorphous carbon structure is dispersed in the carbon nanotube film structure.

The speaker 200 provided in the embodiment of the present invention has substantially the same structure and working principle as the speaker 100 provided in the first embodiment, and the difference is that the carbon nanotube film structure in the voice coil bobbin 240 is formed by at least one carbon nanowire. The structural composition, each carbon nanowire structure comprises a plurality of carbon nanotubes connected end to end by van der Waals force and arranged axially along the nanocarbon line structure. The plurality of nanocarbon line-like structures are arranged in parallel with each other, cross-arranged or woven into a network structure. That is, the plurality of nanocarbon line-like structures in the carbon nanotube film structure are arranged in parallel, crosswise or woven into a network structure. The plurality of nano carbon pipelines may be arranged in parallel to each other to form a bundle structure, or twisted to each other to form a stranded structure.

The nanocarbon line-like structure can include at least one nanocarbon line. The nanocarbon line can be a non-twisted nano carbon line or a twisted nano carbon line. The non-twisted nano carbon pipeline is obtained by treating a carbon nanotube film by an organic solvent. The non-twisted nanocarbon pipeline includes a plurality of carbon nanotubes arranged along the length of the nanocarbon pipeline. Specifically, the non-twisted nanocarbon pipeline includes a plurality of carbon nanotubes connected end to end by van der Waals force and arranged in an axially preferred orientation along the nanocarbon pipeline. The carbon nanotube segments have any length, thickness, uniformity, and shape. The length of the non-twisted nano carbon pipeline is not Limit, diameter from 0.5 nm to 100 microns.

The twisted nanocarbon pipeline is obtained by twisting both ends of the carbon nanotube film in the opposite direction by a mechanical force. The twisted nanocarbon pipeline includes a plurality of carbon nanotubes arranged in an axial spiral arrangement around the carbon nanotubes. Specifically, the twisted nanocarbon pipeline includes a plurality of carbon nanotubes connected end to end by a van der Waals force and spirally extending axially along the nanocarbon line. The carbon nanotube segments have any length, thickness, uniformity, and shape. The twisted nano carbon line is not limited in length and has a diameter of 0.5 nm to 100 μm. Since the nano carbon pipeline is obtained by treating the above carbon nanotube film with an organic solvent or mechanical force, the carbon nanotube film is a self-supporting structure, so the nano carbon pipeline is a self-supporting structure. In addition, the adjacent carbon nanotubes in the nanocarbon pipeline are interspersed in the gap, so the nanocarbon pipeline has a large number of micropores, and the pore diameter of the micropores is less than about 10 micrometers.

With respect to the speaker 100 in the first embodiment, in the speaker 200 of the present embodiment, the carbon nanotube film structure in the voice coil bobbin 240 is formed by a plurality of carbon nanowire structures. Since the carbon nanotubes in the carbon nanowire structure are arranged substantially parallel or spirally along the length direction of the nanocarbon line, the carbon nanowire structure has a large strength and a Young's modulus in the longitudinal direction. The strength and Young's modulus of the direction can be increased by designing the orientation of the nanocarbon line-like structure, for example, by making the length direction of the nanocarbon line-like structure parallel to the axial direction of the voice coil bobbin 240.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by those skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧Speakers

110‧‧‧ bracket

111‧‧‧ Cavity

112‧‧‧ bottom

113‧‧‧ center hole

120‧‧‧ Magnetic field system

121‧‧‧Magnetic lower plate

122‧‧‧Magnetic upper plate

123‧‧‧ magnet

124‧‧‧magnetic core column

125‧‧‧ Magnetic field gap

130‧‧‧ voice coil

140‧‧‧ voice coil skeleton

150‧‧‧Vibration film

160‧‧‧Centering piece

Claims (19)

A voice coil skeleton is improved in that the voice coil skeleton is a hollow tubular structure formed by a layered carbon nanotube composite structure, and the layered carbon nanotube composite structure comprises: a carbon nanotube membrane structure, The carbon nanotube film structure has a plurality of micropores; and an amorphous carbon structure including a plurality of amorphous carbons filled in the micropores. The voice coil skeleton of claim 1, wherein the amorphous carbon is uniformly distributed in the micropores. The voice coil bobbin according to claim 1, wherein the carbon nanotube membrane structure comprises a plurality of carbon nanotubes, and the plurality of amorphous carbons are distributed on the wall of the carbon nanotube or coated on the nanometer. The surface of the carbon tube. The voice coil skeleton of claim 1, wherein the amorphous carbon structure further comprises a plurality of amorphous carbons disposed on surfaces of the carbon nanotube film structure to form two amorphous carbon layers. The voice coil bobbin of claim 3 or 4, wherein the plurality of amorphous carbons in the amorphous carbon structure are combined with the carbon nanotubes by van der Waals forces and covalent bonds. The voice coil bobbin according to claim 1, wherein the plurality of amorphous carbons in the amorphous carbon structure are bonded to each other by a covalent bond. The voice coil bobbin according to claim 6, wherein the amorphous carbon structure is a sponge-like structure, and the carbon nanotube film structure is embedded in the amorphous carbon structure. The voice coil skeleton of claim 6, wherein the covalent bond comprises a sp ² or sp ³ bond between carbon-carbon atoms. The voice coil skeleton according to claim 1, wherein the carbon nanotube membrane structure is a self-supporting structure, and the plurality of carbon nanotubes in the carbon nanotube membrane structure are combined with each other by van der Waals force. The voice coil skeleton according to claim 1, wherein the carbon nanotube membrane structure is composed of at least one nanocarbon pipeline-like structure, and the nanocarbon pipeline-like structure includes a plurality of carbon nanotubes passing through the van der Waals force Connected and arranged axially along the nanocarbon line-like structure. The voice coil bobbin according to claim 10, wherein the carbon nanotube membrane structure comprises a plurality of nanocarbon line-like structures arranged in parallel with each other, cross-arranged or woven into a network structure. The voice coil skeleton of claim 1, wherein the carbon nanotube membrane structure comprises at least one carbon nanotube membrane. The voice coil skeleton of claim 12, wherein the carbon nanotube membrane structure comprises a plurality of carbon nanotube membrane laminates disposed adjacent to each other by a van der Waals force. The voice coil skeleton of claim 12, wherein the carbon nanotube film is isotropic, and the plurality of carbon nanotubes in the carbon nanotube film are uniformly distributed. The voice coil skeleton of claim 12, wherein the plurality of carbon nanotubes in the carbon nanotube film are substantially parallel to each other and substantially parallel to the surface of the carbon nanotube film. The voice coil bobbin according to claim 15, wherein the plurality of carbon nanotubes are connected end to end by van der Waals force and are arranged in a preferred orientation substantially in the same direction. A voice coil skeleton is improved in that the voice coil skeleton is a hollow tubular structure formed by a layered carbon nanotube composite structure, and the layered carbon nanotube composite structure is a carbon nanotube membrane structure and an amorphous shape. Carbon composite composition. A voice coil skeleton is improved in that the voice coil skeleton is a hollow tubular structure formed by a layered carbon nanotube composite structure, and the layered carbon nanotube composite structure comprises: an amorphous carbon structure and a plurality of nanometers a carbon tube, the plurality of carbon nanotubes being disposed in the amorphous carbon structure in the form of a self-supporting carbon nanotube membrane structure, the amorphous carbon structure and the plurality of carbon nanotubes passing through a van der Waals force and covalent The keys are combined. A speaker includes a bracket, a magnetic field system, a voice coil, a voice coil bobbin, a vibrating membrane and a centring support, and the magnetic field system, the voice coil, the voice coil bobbin, the vibrating membrane and the centering fin pass through the The voice coil is fixed in the magnetic field system and disposed on the outer surface of the voice coil bobbin, one end of the vibrating membrane and the centering piece is fixed to the bracket, and the other end is fixed to the voice coil bobbin, and the improvement is that The voice coil skeleton is a hollow tubular structure formed by a layered carbon nanotube composite structure, and the layered carbon nanotube composite structure comprises a carbon nanotube membrane structure and an amorphous carbon structure, and the carbon nanotube membrane The structure has a plurality of micropores, and the amorphous carbon structure includes a plurality of amorphous carbons filled in the micropores.