TWI403184B - Damper and speaker using the damper - Google Patents

Description

Centering piece and speaker using the centering piece

The invention relates to a centering piece and a speaker using the same.

Speakers convert electrical energy into electronic components of mechanical energy, such as telephones, mobile communication terminals, computers, televisions, cassette tapes, sound equipment, and automobiles.

Most of the speakers in the prior art use electric speakers, which generally include a diaphragm, a voice coil, a voice coil bobbin, a centering piece, and a magnetic field system. The speaker moves under the magnetic field by the voice coil, pushing the diaphragm to vibrate and emit sound waves.

One of the important components of the centering film system speaker. The centering piece can buffer the diaphragm in the speaker and limit the voice coil frame. The centering piece is used to support the joint of the voice coil skeleton and the diaphragm to ensure that it is vertical without skew. The centering piece can freely move the voice coil wound around the voice coil skeleton up and down in the magnetic field gap without lateral movement, ensuring that the voice coil does not collide with the magnetic conductive plate in the magnetic field system. In addition, the centering piece can prevent external dust and the like from falling into the magnetic field gap, avoiding the friction between the dust and the voice coil, and causing the speaker to produce an abnormal sound.

Centering struts usually require large axial elasticity and high radial strength. However, the previous centering piece is usually composed of materials such as polymer, metal or paper, and its axial elasticity is small and the radial strength is small, which causes the centering piece to be unable to adapt to the vibration of the voice coil, thereby affecting the speaker. The sound effect. In addition, the previous centering piece is easily deformed by fatigue in repeated vibrations, thereby causing axial collapse along the speaker, resulting in shortened life of the speaker and poor sound quality.

In view of this, it is indeed necessary to provide a centering piece having good elasticity, strength and fatigue resistance and a speaker using the same.

A centering support piece having a through hole and a vibration pattern having a center of symmetry of the through hole, wherein the centering piece includes at least one base body and at least one carbon nanotube structure, and the carbon nanotube structure is disposed on At least one surface of the substrate.

A centering piece comprising at least one base body, wherein the base body is an annular ring body having a through hole, and the base body has a cross section with a wave shape having a center of symmetry of the through hole, wherein the centering branch The sheet further includes at least one carbon nanotube structure disposed on at least one surface of the substrate.

a speaker comprising a voice coil skeleton, a voice coil disposed on the voice coil bobbin; a vibrating membrane connected to one end of the voice coil bobbin; a core support sleeve is disposed on the voice coil bobbin; and a magnetic field system having a magnetic field gap, wherein the magnetic field gap is disposed in the magnetic field gap; wherein the centering support piece includes at least one base body and at least A carbon nanotube structure, the carbon nanotube structure being disposed on at least one surface of the substrate.

Compared with the prior art, the centering piece provided by the present invention and the speaker using the same have the following advantages: the carbon nanotube composed of a carbon nanotube is excellent in strength and elasticity due to the carbon nanotube. The strength and elasticity of the structure are large. Therefore, the composite multilayer structure formed by the superposition of the carbon nanotube structure and the substrate can improve the elasticity of the centering piece and increase the strength of the centering piece, so that it is more beneficial to vibrate. The buffering action of the film, the limiting action on the voice coil skeleton, and the centering piece are not easily fatigue-deformed in repeated vibrations, and thus it is not easy to cause collapse along the axial direction of the speaker, so that the speaker using the centering piece is used. Increased service life and better sound quality. In addition, the carbon nanotubes have a smaller density, and the carbon nanotube structure composed of the carbon nanotubes has a smaller density, thereby improving the centering piece composed of the carbon nanotube structure and the substrate and adopting the same. The specific strength of the speaker of the heart piece, or to maintain or even increase the strength and elasticity of the centering piece while reducing the weight of the centering piece.

The centering piece provided by the present invention and the speaker using the centering piece will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to FIG. 1 and FIG. 2, the first embodiment of the present invention provides a centering support piece 10, and the shape and size of the centering support piece 10 are not limited, and can be prepared according to actual needs. The centering piece 10 has a through hole 16 and a vibration pattern with the through hole 16 as a center of symmetry. The centering support 10 includes a base 12 and two carbon nanotube structures 14, and the base 12 is disposed between the two carbon nanotube structures 14 to form a three-layer structure.

The through hole 16 is disposed at the center of the centering piece 10 and passes through the base body 12 of the centering piece 10 and the two carbon nanotube structures 14. The shape and diameter of the through hole 16 are matched with the shape and diameter of the voice coil bobbin in the speaker, so that the centering support 10 can be sleeved on the voice coil bobbin when the speaker is assembled. The vibrating shape of the centering piece 10 is a zigzag shape, a wave shape, an involute shape, or the like. In this embodiment, the centering piece 10 is a plurality of concentric annular segments centered on the through hole 16 and has a cross section of a wave shape formed by alternating a plurality of peaks and troughs. The thickness of the centering piece 10 is 1 μm or more and 2 mm or less. The preparation method of the centering piece 10 is not limited. Specifically, the method for preparing the centering piece 10 may be pleating forming the three-layer structure formed by the base 12 and the two carbon nanotube structures 14 . A plurality of concentric annular wavy sheets having a center of the through hole 16 are obtained. It can be understood that in this embodiment, the centering piece preform without the through hole can be prepared first, and then the through hole 16 is obtained by punching the center hole.

The base body 12 has better elasticity and higher specific strength, which is beneficial to enhancing the buffering of the vibrating membrane by the centering support piece 10 and the limiting effect on the voice coil bobbin. The substrate 12 is a paper, cloth, cellulose film or polymer film. Specifically, the substrate 12 is a glass fiber cloth, a kraft paper, a polyethylene terephthalate film, a polyimide film, a polyphenylene sulfide film, a polypropylene film, a polystyrene film, a polyvinyl chloride film or a poly Ether film and the like. In this embodiment, the substrate 12 is a polyimide film.

The carbon nanotube structure 14 can be a layered structure comprising at least one layer of carbon nanotube film. The at least one layer of carbon nanotube film may be laid or wound around the surface of the substrate 12 to form the centering piece 10. The carbon nanotube film comprises a plurality of carbon nanotubes uniformly distributed, and the plurality of carbon nanotubes are tightly coupled by a van der Waals force. The carbon nanotubes in the carbon nanotube film are disordered or ordered. The so-called disordered arrangement means that the arrangement direction of the carbon nanotubes is irregular. The so-called ordered arrangement means that the arrangement direction of the carbon nanotubes is regular. Specifically, when the carbon nanotube structure includes a disordered arrangement of carbon nanotubes, the carbon nanotubes are entangled or isotropically aligned; when the carbon nanotube structure includes an ordered arrangement of carbon nanotubes, The carbon nanotubes are arranged in a preferred orientation in one direction or in a plurality of directions. The carbon nanotubes in the carbon nanotube structure 14 include one or more of a single-walled carbon nanotube, a double-walled carbon nanotube, and a multi-walled carbon nanotube. The single-walled carbon nanotube has a diameter of 0.5 nm to 50 nm, the double-walled carbon nanotube has a diameter of 1.0 nm to 50 nm, and the multi-walled carbon nanotube has a diameter of 1.5. Nano ~ 50 nm. Specifically, the carbon nanotube film comprises one or more of a carbon nanotube film, a carbon nanotube film, a carbon nanotube film, and the like.

Referring to FIG. 3, the carbon nanotube film comprises a plurality of carbon nanotubes, and the plurality of carbon nanotubes are arranged substantially in the same direction and substantially parallel to the surface of the carbon nanotube film. Specifically, the carbon nanotube film comprises a plurality of carbon nanotubes which are connected end to end by van der Waals force and are arranged in a preferred orientation in substantially the same direction. The carbon nanotube film can be obtained by directly drawing from a carbon nanotube array. It can be understood that the carbon nanotube structures of different areas and thicknesses can be prepared by laminating a plurality of carbon nanotube films in parallel and without gaps or/and laminating. When the carbon nanotube structure comprises a plurality of stacked carbon nanotube film, the arrangement direction of the carbon nanotubes in the adjacent carbon nanotube film forms an angle α,0 ̊≦α≦90 ̊ . The multi-layer stacked nano carbon tube film, especially the multi-layer cross-setting carbon nanotube film, has higher strength than the single-layer carbon tube film, thereby facilitating the ratio of the centering piece strength. For the structure of the carbon nanotube film and the preparation method thereof, please refer to the application of the patent application of the Republic of China on the Chinese patent application No. 200833862, which was filed on Feb. 12, 2007 by Fan Shoushan et al.

The carbon nanotube rolled film comprises a plurality of carbon nanotubes uniformly distributed. The plurality of carbon nanotubes are disordered and arranged 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, and are tightly bonded. The carbon nanotube rolled film can be obtained by rolling an array of carbon nanotubes. The carbon nanotube array is formed on a surface of the substrate, and the carbon nanotubes in the prepared carbon nanotube rolled film form an angle β with the surface of the base of the carbon nanotube array, wherein β is greater than or equal to 0 degrees And less than or equal to 15 degrees (0 ̊≦β≦15 ̊). Preferably, the carbon nanotubes in the carbon nanotube rolled film are parallel to the surface of the carbon nanotube rolled film. The carbon nanotubes in the carbon nanotube rolled film have different arrangements depending on the manner of rolling. Since the carbon nanotubes in the carbon nanotube film are attracted to each other by the van der Waals force, the carbon nanotube film is a self-supporting structure, which can be self-supported without substrate support. presence. The so-called self-supporting structure, that is, a plurality of carbon nanotubes in the carbon nanotube rolled film are attracted to each other by van der Waals force, so that the carbon nanotube rolled film has a specific shape. For the carbon nanotube rolled film and the preparation method thereof, please refer to the Patent Application No. 200900348 of the Republic of China, which was filed on Jan. 29, 2007 by Fan Shoushan et al.

The carbon nanotube flocculation membrane comprises intertwined carbon nanotubes, the carbon nanotubes having a length greater than 10 cm. The carbon nanotubes are attracted to each other and entangled by van der Waals forces to form a network structure. The carbon nanotube flocculation membrane is isotropic. The carbon nanotubes in the carbon nanotube flocculation membrane are uniformly distributed and randomly arranged to form a large number of microporous structures, and the pore diameter of the micropores is from 1 nm to 10 μm. It can be understood that the length, width and thickness of the carbon nanotube film are not limited and can be selected according to actual needs. For the carbon nanotube flocculation membrane and the preparation method thereof, please refer to the patent application of the Republic of China patent No. 200844041, which was filed on May 11, 2007, by Fan Shoushan et al.

The carbon nanotube film further comprises a carbon nanotube film formed by spraying a slurry containing a carbon nanotube onto a substrate by spraying, and the length and width of the carbon nanotube film formed by the spraying method And thickness is not limited, can be selected according to actual needs. The carbon nanotubes in the carbon nanotube film formed by the spray coating are bonded to each other by a binder, and the carbon nanotubes are randomly arranged in the carbon nanotube film.

In this embodiment, the carbon nanotube structure 14 is a carbon nanotube film. The carbon nanotubes in the carbon nanotube film are multi-walled carbon nanotubes. The multi-walled carbon nanotube has a diameter of 1.5 nm to 50 nm. The substrate 12 and the two carbon nanotube structures 14 may be bonded by a binder or by a combination of heat and pressure to form a three-layer structure. When the substrate 12 and the carbon nanotube structure 14 are tightly bonded by a binder, the binder is related to a specific material of the substrate 12, such as when the substrate 12 is a metal, the binder may be silver. gum.

It can be understood that the portion of the carbon nanotube structure 14 in contact with the substrate 12 can partially penetrate the inside of the substrate 12, so that the tight bonding between the carbon nanotube structure 14 and the substrate 12 can be achieved. The centering support 10 can also form a two-layer structure by the base body 12 and a carbon nanotube structure 14.

Further, the centering piece 10 may be provided with a plurality of wires (not shown). The wire is used to supply current to the voice coil to move the voice coil in the magnetic field. The wire is fixed to the surface of the centering piece 10 by an adhesive. Fixing the wire on the centering piece 10 can reduce the tension of the wire during the vibration process, so that the connection between the wire and the component such as the voice coil is not easily broken.

Referring to FIG. 4, a second embodiment of the present invention provides a centering piece 20 having the same shape as that of the centering piece 10 of the first embodiment, and also includes a through hole 26. The centering support 20 includes a base 22 and a carbon nanotube structure 24. The present embodiment is different from the centering support 10 provided in the first embodiment in that the carbon nanotube structure 24 includes a nano carbon line structure, and the nano carbon line structure is formed by the through hole. 26 is wound around the surface of the substrate 22. The nanocarbon line-like structure has a diameter of 0.5 nm to 1 mm.

The nanocarbon line-like structure includes at least one nanocarbon line, which may be a non-twisted nano carbon line or a twisted nano carbon line. When the nanocarbon pipeline-like structure comprises a plurality of nano carbon pipelines, the nanocarbon pipeline-like structure may be a bundle structure formed by a plurality of nano carbon pipelines arranged in parallel or by a plurality of nano carbon pipelines. Twist the composition of one of the stranded structures.

The non-twisted nanocarbon pipeline may include a plurality of carbon nanotubes aligned along the length of the non-twisted nanocarbon pipeline. The non-twisted nanocarbon line can be obtained by treating the carbon nanotube film with an organic solvent. Specifically, the carbon nanotube film comprises a plurality of carbon nanotube segments, the plurality of carbon nanotube segments are connected end to end by Van der Waals force, and each of the carbon nanotube segments comprises a plurality of parallel and borrowed The carbon nanotubes are tightly combined by Van der Valli. The carbon nanotube segments have any length, thickness, uniformity, and shape. The non-twisted nano carbon line is not limited in length and has a diameter of 0.5 nm to 1 mm. Specifically, the organic solvent may be immersed on the entire surface of the carbon nanotube film, and the plurality of nanoparticles parallel to each other in the carbon nanotube film may be formed under the action of the surface tension generated by the volatilization of the volatile organic solvent. The carbon tube is tightly bonded by the van der Waals force, thereby shrinking the carbon nanotube film into a non-twisted nano carbon line. The organic solvent is a volatile organic solvent such as ethanol, methanol, acetone, dichloroethane or chloroform, and ethanol is used in this embodiment. The non-twisted nanocarbon line treated by the organic solvent has a smaller specific surface area and a lower viscosity than the carbon nanotube film which is not treated with the organic solvent.

The twisted nanocarbon pipeline includes a plurality of carbon nanotubes arranged in an axial spiral arrangement around the twisted nanocarbon pipeline. The nanocarbon pipeline can be obtained by twisting both ends of the carbon nanotube film in the opposite direction by a mechanical force. Further, the twisted nanocarbon line can be treated with a volatile organic solvent. Under the action of the surface tension generated by the volatilization of the volatile organic solvent, the adjacent nanocarbon tubes in the twisted nanocarbon pipeline after treatment are closely combined by van der Waals force to make the ratio of twisted nano carbon pipelines. The surface area is reduced, and the density and strength are increased.

For the nano carbon pipeline and its preparation method, please refer to the patent filed by Fan Shoushan et al. on November 5, 2002, announced on November 21, 2008, the Republic of China patent with the announcement number I303239; and December 16, 2005 The application for the day, announced on July 21, 2009, the announcement number is I312337 of the Republic of China patent.

In this embodiment, the carbon nanotube structure 24 is a twisted wire structure composed of three twisted nano carbon pipelines twisted to each other.

It will be understood that the carbon nanotube structure 24 may also comprise a carbon nanotube hybrid linear structure (not shown). The carbon nanotube mixed linear structure comprises a bundle structure of a carbon carbon pipeline parallel to a line of other materials or a twisted wire structure formed by twisting a line of a nano carbon pipeline and other materials. Preferably, the line of other materials needs to have better elasticity, strength, and lesser density. The other material is a polymer, paper, fiber, cloth or metal.

Referring to FIG. 5, a third embodiment of the present invention provides a centering piece 30 having the same shape as that of the centering piece 10 provided in the first embodiment. The centering support piece 30 includes a base body 32 and a carbon nanotube structure 34, and the carbon nanotube structure 34 is disposed on the surface of the base body 32 to form a two-layer structure.

This embodiment is different from the centering support 10 provided in the first embodiment in that the centering support piece 30 in this embodiment is a two-layer structure, and the carbon nanotube structure 34 includes a plurality of nano tubes. Carbon line structure 342. The plurality of nanocarbon line-like structures 342 may be disposed in parallel, crosswise or woven in a manner on one surface of the substrate 32. Specifically, the plurality of nanocarbon line-like structures 342 may be disposed in parallel, intersected, or woven in a certain manner to form a planar structure, and then the planar structure is disposed on the substrate by an adhesive or hot pressing. 32 surface. The plurality of nanocarbon line-like structures 342 may also be disposed directly in parallel, crosswise or woven on the surface of the substrate 32, and tightly bonded to the substrate 32 by adhesive or heat pressing. In this embodiment, the carbon nanotube structure 34 includes a plurality of nanocarbon line-like structures 342 woven into a network structure in a certain manner.

The plurality of nanocarbon line-like structures 342 may also be mixed with other wires to form the carbon nanotube structure 34. Specifically, the plurality of nanocarbon line-like structures 342 may be disposed in parallel with other lines, crosswise or woven on the surface of the base 32, and bonded to the substrate 32 by adhesive or heat pressing. Closely integrated.

It can be understood that the centering piece 30 can also include two of the carbon nanotube structures 34 and one base 32, and the base 32 is formed between the two carbon nanotube structures 34.

Referring to FIG. 6, a fourth embodiment of the present invention provides a centering piece 40 having the same shape as the centering piece 10. The centering support piece 40 includes a base body 42 , a carbon nanotube structure 44 and a reinforcement layer 48 , and the carbon nanotube structure 44 is disposed between the base body 42 and the reinforcement layer 48 .

The embodiment is different from the centering piece 10 provided in the first embodiment in that the centering piece 40 in this embodiment further includes a reinforcing layer 48. Further, the carbon nanotube structure 44 may include not only the carbon nanotube film provided in the first embodiment, but also the nanocarbon line-like structure provided in the second embodiment. In addition, the carbon nanotube structure 44 may further include at least one nanocarbon line-like structure and at least one carbon nanotube film, and the at least one nanocarbon line-like structure may be sealed by an adhesive or hot pressed The method is disposed on the surface of the at least one layer of carbon nanotube film. In this embodiment, the carbon nanotube structure 44 is a carbon nanotube film.

The material of the reinforcing layer 48 is metal, paper, polymer, diamond, boron carbide or ceramic. The reinforcing layer 48 may be disposed on the surface of the carbon nanotube structure 44 by coating or deposition. The reinforcing layer 48 has the function of tightly bonding the substrate 42 and the carbon nanotube structure 44 together. Preferably, the material of the reinforcing layer 48 and the substrate 42 can be better combined or have better compatibility. For example, when the substrate 42 is a metal, the material of the reinforcing layer 48 can preferably be the same as the substrate. 42 the same metal, such that the carbon nanotube structure 44 and the substrate 42 can be more tightly bonded. Specifically, the method for preparing the centering piece 40 in this embodiment may include: coating or depositing a reinforcing layer 48 on the surface of the carbon nanotube structure 44; and laying the carbon nanotube structure 44 on the surface The surface of the substrate 42 is described.

Referring to FIG. 7, a fifth embodiment of the present invention provides a centering piece 50 having the same shape as the centering piece 10. The centering support 50 includes two bases 52 and a carbon nanotube structure 54, and the carbon nanotube structure 54 is disposed between the two bases 52 to form a three-layer structure.

This embodiment differs from the centering support 10 provided in the first embodiment in that the centering support 50 includes two base bodies 52 and one carbon nanotube structure 54. Additionally, the carbon nanotube structure 54 is the same as the carbon nanotube structure 44 provided in the fourth embodiment.

It can be understood that the centering piece 50 may also include a plurality of the base body 52 and a plurality of the carbon nanotube structures 54 alternately arranged to form a structure of three or more layers, that is, the carbon nanotube structure 54 is disposed. Between adjacent two substrates 52 or the substrate 52 is disposed between the adjacent two carbon nanotube structures 54. Wherein, the carbon nanotube structure 54 also includes the carbon nanotube structure 44 and the reinforcing layer 48 in the fourth embodiment.

Referring to Figures 8 and 9, the present invention further provides a speaker 100 to which the centering support 10 is applied. The speaker 100 includes a magnetic field system 120, a bracket 110, a diaphragm 150, a voice coil 130, a voice coil bobbin 140, and the centering support 10 described above. The magnetic field system 120 is fixed to the bracket 110. The outer edge of the diaphragm 150 is fixed to the bracket 110, and the diaphragm 150 is connected to one end of the voice coil bobbin 140. The voice coil 130 is disposed on an outer surface of one end of the voice coil bobbin 140 and is received in the magnetic field system 120. The centering piece 10 is sleeved on the voice coil bobbin 140.

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 disposed by concentrically disposed magnetically permeable lower plates 121 and The magnetic conductive 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 120. The magnetic conductive core 124 is integrally formed with the magnetic lower plate 121, and the magnetic core 124 is received in the cylindrical space and passes through the central hole 113. The magnetic core stud 124 forms an annular magnetic field gap 125 with the magnet 123 for receiving 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 fixedly connected to the bottom portion 112 of the bracket 110 by the magnetic conductive upper plate 122, and the connection method may be screw connection, mating fixing, bonding, or the like. In the embodiment, the magnetic upper plate 122 and the bottom portion 112 are fixed by a screw connection.

The bracket 110 has a truncated cone structure with an open end and a cavity 111 and a bottom portion 112. The cavity 111 is provided with the diaphragm 150 and the centering piece 10. The bottom portion 112 also has a central aperture 113 for nesting the magnetic field system 120. The bracket 110 is fixed relative to the magnetic field system 120 by the bottom 112.

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 cone structure; when the diaphragm 150 is applied to the miniature In the case of the speaker 100, the diaphragm 150 may have a disk-like structure. In this embodiment, the vibrating membrane 150 is a hollow cone structure; the top end of the vibrating membrane 150 and the voice coil bobbin 140 are fixedly connected by bonding, and the other end of the vibrating membrane 150 and the bracket 110 are Active connection.

The voice coil 130 is disposed on the voice coil bobbin 140 and is received in the magnetic field gap 125. The voice coil 130 is a driving unit of the speaker 100 and moves up and down in the magnetic field gap 125. The voice coil 130 is formed by winding a thinner wire on the voice coil bobbin 140. Preferably, the wire is an enameled wire. When the voice coil 130 receives the audio electrical signal, the voice coil 130 generates a magnetic field that varies with the audio current. The magnetic field of the change interacts with the constant magnetic field in the magnetic field gap 125, forcing the voice coil 130 to generate vibration.

The voice coil bobbin 140 is a hollow cylindrical structure disposed concentrically with the magnetic core stud 124 and spaced apart from the magnetic core stud 124 . The voice coil bobbin 140 is fixedly connected to the voice coil 130, and one end of the voice coil bobbin 140 is connected to the vibrating membrane 150, so that when the voice coil bobbin 140 vibrates with the voice coil 130, the vibrating membrane 150 is driven. The vibration is caused to move the air around the diaphragm 150 to generate sound waves.

The centering piece 10 is sleeved on the voice coil bobbin 140 by the through hole 16 , and the outer edge of the centering piece 10 is fixed to the bracket 110 , and the centering piece 10 is used for supporting the support The voice coil bobbin 140 is described, and the voice coil bobbin 140 functions as a lateral limit. Since the centering support 10 has greater elasticity and strength, and the voice coil 130 is wound around the voice coil bobbin 140, the voice coil 130 can freely move up and down in the magnetic field gap 125 without The lateral movement is performed, that is, the centering piece 10 acts as a limit on the voice coil 130 to prevent the voice coil 130 from touching the magnetic field system 120. In addition, since the centering piece 10 is disposed between the magnetic field system 120 and the diaphragm 150, dust can be prevented from entering the magnetic field gap 125 in the magnetic field system 120.

The centering support 10 also affects the resonant frequency of the diaphragm 150 and the voice coil 130 in the speaker 100. Specifically, the centering support 10 and the diaphragm 150 and the voice coil 130 together determine the resonant frequency of the speaker 100. In addition to the properties of the material of the centering struts 10, the factors affecting the resonant frequency include the geometry of the centering struts 10.

It can be understood that the speaker 100 to which the centering piece 10 is applied is not limited to the above structure, and the centering piece 10 can also be applied to a microspeaker using a planar diaphragm. In addition, the centering segments 20, 30, 40, and 50 provided by the embodiments of the present invention can also be applied to the speaker 100 described above.

The centering support piece and the speaker using the same are provided with the following advantages: First, since the carbon nanotube has excellent strength and elasticity, the carbon nanotube structure composed of a carbon nanotube The strength and elasticity are large. Therefore, the composite multi-layer structure formed by superposing the carbon nanotube structure and the base material can improve the elasticity of the centering piece and increase the strength of the centering piece, so that it is more favorable to the centering branch. The film acts as a buffer on the diaphragm, and acts as a limit on the voice coil and the voice coil bobbin, and makes the centering piece not easily fatigue-deformed in repeated vibrations, and thus is less likely to cause collapse along the axial direction of the speaker, so that the use The life of the speaker of the centering piece is increased, and the sound quality is good. Secondly, if the carbon nanotubes have a small density, the density of the carbon nanotube structure composed of the carbon nanotubes is also small, and the centering support piece provided by the embodiment of the present invention maintains or even improves the centering support. The strength and elasticity can reduce the quality of the centering piece and reduce the quality of the speaker. Thirdly, since the carbon nanotubes have good moisture resistance and flame resistance, the carbon nanotube structure composed of the carbon nanotubes also has good moisture resistance and flame resistance, so the centering provided by the embodiment of the present invention The support sheet also has good moisture resistance and flame resistance.

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 persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10;20;30;40;50‧‧‧ centering piece

12;22;32;42;52‧‧‧ base

14;24;34;44;54‧‧・nano carbon nanotube structure

16;26‧‧‧through hole

342‧‧‧Nano carbon pipeline structure

48‧‧‧Enhancement layer

100‧‧‧Speakers

110‧‧‧ bracket

111‧‧‧ Cavity

112‧‧‧Bottom of the bracket

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

1 is a schematic structural view of a centering piece provided by a first embodiment of the present invention.

Figure 2 is a cross-sectional view of the centering piece of Figure 1 taken along line II-II.

3 is a scanning electron micrograph of a carbon nanotube film taken in a centering piece provided by a first embodiment of the present invention.

4 is a schematic structural view of a centering piece provided by a second embodiment of the present invention.

Figure 5 is an exploded view of a centering piece provided by a third embodiment of the present invention.

Figure 6 is a cross-sectional view of a centering piece provided by a fourth embodiment of the present invention.

Figure 7 is a cross-sectional view showing a centering piece provided by a fifth embodiment of the present invention.

Fig. 8 is an exploded view of the speaker using the centering piece provided in the first embodiment.

Figure 9 is a cross-sectional view of the speaker shown in Figure 8.

10‧‧‧ Centering piece

12‧‧‧ base

14‧‧‧Nano Carbon Tube Structure

16‧‧‧through hole

Claims (19)

A centering support piece having a through hole and a vibration pattern having a center of symmetry of the through hole, wherein the centering piece includes at least one base body and at least one carbon nanotube structure, the carbon nanotube structure And disposed on at least one surface of the substrate. The centering piece according to claim 1, wherein the centering piece comprises two bases and one carbon nanotube structure, and the carbon nanotube structure is disposed on the two bases between. The centering piece according to claim 1, wherein the centering piece comprises a base body and two carbon nanotube structures, and the base body is disposed on the two carbon nanotube structures between. The centering piece according to claim 1, wherein the carbon nanotube structure comprises at least one layer of carbon nanotube film, at least one nanocarbon line structure or a composite structure thereof. The centering piece according to claim 4, wherein the carbon nanotube structure comprises at least two layers of carbon nanotube films stacked in a stack. The centering piece according to claim 4, wherein the carbon nanotube film comprises a plurality of carbon nanotubes connected end to end and arranged in a preferred orientation in the same direction, and the plurality of carbon nanotubes They are connected to each other by Van der Valli. The centering piece according to claim 4, wherein the carbon nanotube structure comprises a plurality of nanocarbon line-like structures arranged in parallel, intersecting or interwoven. The centering segment of claim 4, wherein the nanocarbon line-like structure comprises at least one twisted nanocarbon line or at least one non-twisted nanocarbon line. The centering piece according to claim 8, wherein the nanocarbon line-like structure is wound around a surface of the substrate. The centering slab of claim 8, wherein the twisted nanocarbon pipeline comprises a plurality of carbon nanotubes axially arranged around the twisted nanocarbon pipeline. The centering slab of claim 8, wherein the non-twisted nanocarbon pipeline comprises a plurality of carbon nanotubes arranged along the length of the non-twisted nanocarbon pipeline. The centering piece according to claim 4, wherein the composite structure comprises at least one nanocarbon line-like structure and at least one layer of carbon nanotube film, and the at least one nanocarbon line structure is set And at least one surface of the carbon nanotube film. The centering piece according to claim 1, further comprising a reinforcing layer disposed between the substrate and the surface of the carbon nanotube structure, the reinforcing layer material being metal, One of diamond, boron carbide, and ceramic, or any combination thereof. The centering piece according to claim 1, wherein the substrate is a paper, a cloth, a fiber-based film or a polymer film. The centering piece according to claim 1, wherein the vibrating shape is a zigzag shape, a wave shape or an involute shape. The centering piece according to claim 1, wherein the centering piece has a cross-sectional shape which is a wave shape formed by alternating a plurality of peaks and troughs. A centering piece comprising at least one base body, the base body is an annular ring body having a through hole, and the sectional shape of the base body is a wave shape having the through hole as a center of symmetry, and the improvement is that The centering support further includes at least one carbon nanotube structure disposed on at least one surface of the substrate. A speaker comprising:
a voice coil skeleton,
a voice coil, the voice coil is disposed on the voice coil skeleton;
a vibrating membrane connected to one end of the voice coil bobbin;
a centering piece, the centering piece is sleeved on the voice coil frame, the centering piece has a through hole and a vibration pattern with the through hole as a center of symmetry; and a magnetic field system having a magnetic field a gap, the voice coil is disposed in the magnetic field gap;
The improvement is that the centering support piece comprises at least one base body and at least one carbon nanotube structure, and the carbon nanotube structure is disposed on at least one surface of the base body. A speaker comprising:
a voice coil skeleton,
a voice coil, the voice coil is disposed on the voice coil skeleton;
a vibrating membrane connected to one end of the voice coil bobbin;
a centering piece, the centering piece is sleeved on the voice coil frame, the centering piece includes at least one base body, the base body is an annular ring body having a through hole, and the sectional shape of the base body is a wave shape having the through hole as a center of symmetry; and a magnetic field system having a magnetic field gap, the voice coil being disposed in the magnetic field gap;
The improvement is that the centering piece further comprises at least one carbon nanotube structure, and the carbon nanotube structure is disposed on at least one surface of the substrate.