WO2009082847A1 - Module d'excitation audio vibrant - Google Patents

Module d'excitation audio vibrant Download PDF

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Publication number
WO2009082847A1
WO2009082847A1 PCT/CN2007/003876 CN2007003876W WO2009082847A1 WO 2009082847 A1 WO2009082847 A1 WO 2009082847A1 CN 2007003876 W CN2007003876 W CN 2007003876W WO 2009082847 A1 WO2009082847 A1 WO 2009082847A1
Authority
WO
WIPO (PCT)
Prior art keywords
vibration
vibrating
cover
inner cavity
audio driver
Prior art date
Application number
PCT/CN2007/003876
Other languages
English (en)
Chinese (zh)
Inventor
Xinwei Zhang
Original Assignee
I-Mu Technology Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by I-Mu Technology Co., Ltd. filed Critical I-Mu Technology Co., Ltd.
Priority to PCT/CN2007/003876 priority Critical patent/WO2009082847A1/fr
Publication of WO2009082847A1 publication Critical patent/WO2009082847A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R15/00—Magnetostrictive transducers

Definitions

  • This invention relates to a novel speaker technology in the field of acoustic equipment, and more particularly to a device for converting an audio signal into mechanical vibration using a telescopic feature produced by a rare earth magnetostrictive material under the action of a magnetic field. Background technique
  • the driver consists of a rare earth giant magnetostrictive material rod, a driving coil, a tubular permanent magnet bias magnetic field, a pre-tensioned butterfly spring, a positive T-shaped motion-extracting rod, and a back pressing end cover, which are composed of front and rear magnetic sheets and tubular permanent
  • the magnet constitutes a closed magnetic path ring, and the rear compression end cap is used to adjust the magnitude of the strain material prestress.
  • Chinese patent ZL00207417.6 discloses a magnetostrictive vibration generator, that is, a driver. This drive is mainly used for vibration or sound.
  • the core component of the driver is a rare earth giant magnetostrictive material.
  • the basic structure is similar to that disclosed in MACHINE DESIGN, AUGUST 8 1994, V66, N15, P.18.
  • the positive T-shaped motion output guide is used, and the front gland adjusts the prestress. Size, but The structure of the threaded rod pressing the gland is adopted, and since the closed magnetic circuit design is not adopted, there is a problem that the leakage driving efficiency is low.
  • Chinese patent ZL00264745.1 discloses a giant magnetostrictive material speaker which has the above-mentioned similar rare earth giant magnetostrictive material driver and a sound emitting radiation panel mounted on the positive T-shaped rod end.
  • the driver of the patent adopts The MACHINE DESIGN, AUGUST 8 1994, V66, N15, P.18 drives are completely similar in construction, the only difference being that instead of a pre-tensioned butterfly spring, high-strength rubber is used. This structure also has the problem of magnetic flux leakage.
  • Chinese patent ZL01208463.8 discloses a magnetostrictive high fidelity flat panel loudspeaker comprising a moving core component comprising a rare earth magnetostrictive material, a drive driven by the material and a soundboard.
  • the drive has a motion amplification mechanism that increases the range of motion.
  • the driver does not have a closed magnetic circuit or a magnetic shielding structure, and there is a problem of magnetic flux leakage.
  • Chinese Patent Application No. 92109581.3 discloses a driving system for a sounding device whose core driving element is a rare earth giant magnetostrictive material and is of a drum type.
  • the double-pressure beam pre-tightening structure is superimposed by more than one driving unit, the structure is complicated, the assembly process is cumbersome, and it is not suitable for industrial production.
  • Chinese patent ZL200620108620.8 discloses an attached type audio transducer, which is composed of a coil, a coil holder, a rare earth giant magnetostrictive material as a core driving component, a permanent magnet piece and a top cap, and has a structure similar to ZL00207417.6. Replace the pre-tensioned butterfly spring with a resilient base. At the same time, the digital micro-distribution board and control switch are integrated in the whole body.
  • the elastic base simultaneously exerts a pre-stress on the rare earth giant magnetostrictive material, but the vibration output force is dispersed due to the large area of the base, thereby reducing the efficiency, and the self-interference noise and heat dissipation are generated due to the integration of the supply and discharge circuit and the body. Difficulties and other issues. Summary of the invention
  • the invention provides a novel vibration type audio driver, which solves the problem of leakage magnetic flux in the prior art because there is no closed magnetic circuit or magnetic shielding structure, the problem of low driving efficiency, and the integration of the supply and discharge circuit and the body Together, there are problems such as self-interference noise and heat dissipation.
  • the present invention provides a vibration type audio driver including a weight body, a vibration member, a vibration transmitting device provided with a vibration cover, an elastic pad, and a locking end cover.
  • the weight body is a substantially cylindrical body made of a magnetically permeable material such as iron, forming a longitudinal cylindrical cavity along a longitudinal central axis of the cylindrical body; the vibrating member is mounted in the cylindrical cavity of the weight body
  • the vibrating member includes a column of magnetostrictive material, and the column of magnetostrictive material may a permanent magnet made of a rare earth giant magnetostrictive material and disposed at both ends of the magnetostrictive material column in the longitudinal direction to form a fixed magnetic field, the permanent magnet being made of neodymium iron boron magnetic steel and surrounding the column of magnetostrictive material a coil bracket, wound on the coil holder and introducing an audio electric signal to form a line of an alternating magnetic field, wherein the vibrating member vibrates in a longitudinal direction in the cylindrical
  • the cylindrical inner cavity of the weight body may include a concentric first cylindrical inner cavity and a second cylindrical inner cavity, and the vibrating member is received in the first cylindrical inner cavity and the second cylindrical inner cavity, The outer circumference of the vibrating cover is fitted in the second cylindrical inner cavity such that the vibrating cover can move relative thereto, and the locking end cover of the vibration transmitting device is connected with the weight body, and the center of the locking end cap has a through hole, the vibrating cover protrudes from the locking end cover outwardly from the vibrating end surface thereof through the through hole.
  • a horizontal wire joint outlet hole is further disposed in the weight body, and the joint of the coil is connected to an external audio signal source through the lead-out hole, and the lead-out hole is connected to the first cylindrical inner cavity, and one end of the weight body
  • the outer surface of the cylinder has locking threads, and the top of the weight body has assembly screw holes for assembly. Since the weight body is made of a magnetically permeable material having good magnetic permeability, it is possible to shield the magnetic field without magnetic leakage, and thus the magnetic flux is enhanced.
  • the vibrating cover may have a third cylindrical inner cavity concentric with the first cylindrical inner cavity and the second cylindrical inner cavity, the third cylindrical inner cavity and the first cylindrical inner cavity and the second cylindrical
  • the shaped cavities together form a vibrating space that defines the vibrating component.
  • the vibrating cover may further include a flange portion, and an elastic pad is disposed between the flange portion and the locking end cover, the elastic pad has a buffering function, and can fully protect the rare earth material from rigid pressure and torque Damage, and provides an elastic restoring force to the vibrating cover when the vibrating member contracts due to the magnetostrictive material.
  • a cushion is disposed on the vibrating end surface of the vibrating cover that protrudes outward from the locking end cover.
  • the two ends of the vibrating member may be respectively provided with a first positioning protrusion and a second positioning protrusion, and the first positioning protrusion cooperates with a first positioning hole formed at a top center of the weight body, and the second positioning protrusion and the formation
  • a second positioning hole at a center of the end face of the vibrating inner cavity of the vibrating cover is engaged such that the vibrating member maintains vibration on the axis of the vibrating inner cavity.
  • Each of the first positioning protrusion and the second positioning protrusion includes a conical tip and a cylindrical portion, and a bottom surface of the cylindrical portion is disposed
  • the counterbore one end of the permanent magnet at both ends of the vibrating member is inserted into the counterbore and fixedly fixed in the counterbore.
  • the magnetostrictive material column of the vibrating member may include two segments including a permanent magnet between the two segments of magnetostrictive material, the permanent magnet being made of neodymium iron boron magnetic steel, the magnetostriction
  • the material column is made of a rare earth giant magnetostrictive material. It has been proved by a large number of experiments that the structure in which the three permanent magnets are alternately arranged with the two-stage magnetostrictive material can maximize the magnetic deformation characteristics of the rare earth giant magnetostrictive material.
  • connection of the locking end cover to the weight body can be achieved by the engagement of the thread on the locking end cover with the locking thread on the weight body, and the center of the locking end cover is open a hole through which the vibrating cover protrudes outward from the locking end cap.
  • first positioning projection, the second positioning projection, the vibrating cover, and the locking end cap may each be made of aluminum.
  • the structure of the above-mentioned vibration transmitting device avoids damage of the rare earth giant magnetostrictive material due to the simultaneous twisting of the vibrating member due to the rigid contact during the thread locking process during assembly. At the same time, this structure makes the vibration transmission point more concentrated, avoiding large-area vibration of the entire bottom and improving vibration efficiency.
  • the middle portion of the coil bracket has a cylindrical shape, and both ends of the bracket have outwardly protruding flanges.
  • a through hole penetrates the coil bracket along the central axis of the coil bracket, and one or more windings are wound around the entire length of the outer surface of the middle portion of the coil bracket.
  • the coil bobbin houses two permanent magnets between the magnetostrictive material column and the two magnetostrictive material columns, one end of the permanent magnets at the two ends of the vibrating member protrudes into the coil bobbin, and the coil bobbin 7 is resistant to high temperature Made of insulating material.
  • the coil bracket of the invention solves the production efficiency problem in the industrial production process, and specifically avoids that if the coil is directly wound on the vibrating component, it must be bonded with glue in advance, and the thickness of the bonding surface is inconsistent and easy to cause the whole
  • the length cannot be precisely controlled and the defects of the rare earth giant magnetostrictive material are easily damaged due to the lateral force during the winding of the coil.
  • a preferred planar attachment method is employed, and the vibration type audio driver can be attached to almost any hard mirror plane by a suction cup provided on the bottom of the vibrating cover, the suction cup including
  • the suction cup elastic device, the suction cup pressure cover and the vacuum rubber pad at the bottom of the suction cup can achieve the relaxation or adsorption state of the vacuum rubber pad and the adsorbed surface at the bottom of the suction cup by the elastic adjustment of the elastic device, and the sound of the adsorbed surface can be achieved under the adsorption state.
  • the suction force of the suction cup replaces the pre-fabrication pressure of part of the weight body, so that the weight body can be sufficiently reduced.
  • the invention is used in conjunction with an external AV power amplifier and is used in contact with a solid hard planar medium.
  • the system, the large solid rigid surface includes but is not limited to indoor table tops, curtain walls, doors, ceilings, floors, outdoor billboards, exhibition refusals, cars, boat bodies, and the like.
  • the material of the solid hard planar medium is selected from any one of wood, metal, glass, hard plastic, ceramic, stone material, artificial composite material or a combination thereof.
  • the vibrating audio driver of the present invention generates an alternating magnetic field in the coil by the audio signal through the AV power amplifier, so that the rare earth giant magnetostrictive material in the coil generates a telescopic deformation under the action of the magnetic field, thereby converting the audio signal into a vibration signal. And through the weight of the counterweight at the top, the vibration signal is restored to an audio signal by attaching to any hard plane to achieve the effect of driving the sound of the hard plane.
  • the vibration type audio driver includes a weight body made of a magnetic conductive material, a vibrating member, and a vibration transmitting device.
  • the vibrating audio driver of the present invention has no directivity, can penetrate a hard plane, has a large output power, a wide frequency response range, is small in size, and is easy to carry, and can be used as an external device of an audio device.
  • FIG. 1 is a schematic exploded view showing the overall assembly of a vibration type audio driver according to a first embodiment of the present invention
  • Fig. 2 is a cross-sectional view showing a vibration type audio driver according to a first embodiment of the present invention
  • Fig. 3 is a cross-sectional view showing a vibration type audio driver having a suction cup according to a second embodiment of the present invention.
  • FIG. 1 is a general assembly exploded view showing a vibration type audio driver according to a first embodiment of the present invention, showing a weight body 1, a vibration member 19, a vibration cover 9, an elastic pad 10, and a lock end cover 11. Vibration transmission device.
  • the vibration type audio driver includes a weight body 1, a vibration member 19, a vibration having a vibration cover 9, an elastic pad 10, and a locking end cover 11.
  • the weight body 1 is a substantially cylindrical body made of a magnetically permeable material such as iron, forming a concentric first cylindrical cavity 16 and a second cylindrical shape along a longitudinal central axis of the cylindrical body.
  • the cavity 17, the first cylindrical inner cavity and the second cylindrical inner cavity may have the same or different diameters which together form a cylindrical inner cavity.
  • a lateral coil joint outlet hole 8 is further disposed in the weight body, and the joint of the coil 6 is connected to an external audio signal source through the lead-out hole, and the lead-out hole is connected to the first cylindrical inner cavity, and the weight body is connected at one end.
  • the outer surface of the cylinder has locking threads on the top, and the top of the weight body has assembly screw holes 2 for assembly.
  • the vibrating member 19 is housed in a first cylindrical inner cavity and a second cylindrical inner cavity, and includes a magnetostrictive material column 5, a permanent magnet disposed at both ends of the magnetostrictive material column and forming a fixed magnetic field in the longitudinal direction. 4, a coil holder 7 surrounding the column of magnetostrictive material, wound on the bracket and introducing an audio electric signal to form a coil 6 of an alternating magnetic field, the vibrating member 19 vibrating in the longitudinal direction of the cylindrical cavity in an operating state, The coil is connected to an external audio signal source.
  • the vibration transmitting device includes a vibrating cover 9 made of a non-magnetically permeable material and a locking end cap 11, the vibrating cover cooperating with the cylindrical inner cavity to define a vibration space of the vibrating member, and The vibrating member is driven to vibrate synchronously, and the locking end cap 11 supports and supports the vibrating cover 9 on the weight body 1.
  • the vibrating cover has a vibrating end surface that can contact the hard outer surface, and transmits the vibration generated by the vibrating member. To the outer surface.
  • the outer circumference of the vibrating cover 9 is fitted in the second cylindrical inner cavity such that the vibrating cover can move relative thereto, and the locking end cover of the vibration transmitting device is connected with the weight body, and the end cap is locked
  • the center has a through hole through which the vibrating cover protrudes outward from the locking end cover.
  • the vibrating cover may further have a third cylindrical inner cavity 18 concentric with the first cylindrical inner cavity and the second cylindrical inner cavity, the third cylindrical inner cavity 18, the first cylindrical inner cavity 16 A vibration space defining the vibrating member is formed together with the second cylindrical inner cavity 17.
  • the vibrating cover may further include a flange portion, and an elastic pad 10 is disposed between the flange portion and the locking end cap.
  • the elastic pad 10 provides a resilient restoring force when the vibrating member contracts.
  • the elastic pad 10 has a buffering function and can sufficiently protect the rare earth material from the rigid pressure and the torsion.
  • a cushion 12 may be disposed on the vibrating end surface of the vibrating cover projecting outward from the locking end cap for absorbing the contact between the vibrating broken end surface and the hard surface to be contacted.
  • Both ends of the vibrating member 19 may be respectively provided with a first positioning protrusion 20 and a second positioning protrusion
  • the first positioning protrusion cooperates with a first positioning hole 22 formed at a top center of the weight body 1
  • the second positioning protrusion cooperates with a second positioning hole 23 formed at a center of the end surface of the vibrating cover toward the vibration inner cavity, so that the vibrating member is kept vibrating on an axis of the vibration inner cavity, the first positioning protrusion
  • each of the second positioning projections includes a conical tip and a cylindrical portion, and a bottom surface of the cylindrical portion is provided with a counterbore (not shown), and one end of the permanent magnet at both ends of the vibrating member is inserted into the counterbore and fixedly attached thereto Said in the counterbore.
  • the magnetostrictive material column 5 of the vibrating member may be two-stage, and comprises a permanent magnet 4 between two columns of magnetostrictive material columns, the magnetostrictive material column being made of a rare earth giant magnetostrictive material.
  • the magnetostrictive material column may also be a length, and the two permanent magnets 4 are disposed at both ends of the magnetostrictive material column in the longitudinal direction to form a fixed magnetic field, and the permanent magnet may be made of neodymium iron boron magnetic steel.
  • the middle portion of the coil holder 7 has a cylindrical shape, and both ends of the bracket have outwardly protruding flanges.
  • a through hole extends through the coil bracket along the central axis of the coil holder, and a layer is wound around the entire length of the outer surface of the middle portion of the line bracket.
  • the multi-layer wire ⁇ 6 the through hole of the coil holder accommodates two permanent magnets between the column of magnetostrictive material and the two columns of magnetostrictive material, and one end of the permanent magnet at both ends of the vibrating member protrudes into the coil holder.
  • the coil holder is made of a high temperature resistant insulating material.
  • a coil connected to an external audio signal source is wound on the wire cassette holder to introduce an audio electric signal to form an alternating magnetic field, and the vibrating member vibrates in the longitudinal direction in the cylindrical cavity in an operating state.
  • first positioning projection 20, the second positioning projection 21, the vibration cover 9 and the locking end cover 11 may be made of a non-magnetic material such as metal, such as aluminum.
  • FIG. 3 is a cross-sectional view showing a vibrating type audio driver having a chuck according to a second embodiment of the present invention.
  • the embodiment adds a plane attachment mode, and the vibration type audio driver can be adsorbed on almost any hard mirror plane by a suction cup provided on the bottom of the vibration cover, the suction cup includes The suction cup elastic device 13, the suction cup pressure cover 14 and the vacuum rubber pad 15 at the bottom of the suction cup can be loosened or adjusted by the elastic adjustment of the elastic device at the bottom of the suction cup, and the adsorbed surface can be reached under the adsorption state. The effect of the sound.
  • the suction force of the suction cup replaces the pre-fabrication pressure of some of the weight bodies, so the weight body can be sufficiently reduced.
  • any reference to the upper side, the lower side, the upper, middle, lower or top and bottom and horizontal and vertical, or any other relative to one component is described.
  • the use of the components, unless otherwise stated, is intended to facilitate the description of the invention and is not intended to limit the invention or its components to any one position or spatial orientation. All dimensions of the components in the figures may be made with the possible designs and planned embodiments. It is intended to be varied without departing from the scope of the invention.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

L'invention porte sur un module d'excitation audio vibrant comprenant un corps de contrepoids fait de matériau magnétique, une partie vibrante, un couvercle vibrant, un coussin élastique et un couvercle à extrémité bloquée. Dans ce module, le signal acoustique passe à travers un amplificateur de puissance AV, un champ alternatif est produit dans des bobines, et le matériau à supermagnétostriction aux terres rares dans les bobines produit une déformation d'expansion sous l'action du champ magnétique, et ainsi le signal acoustique est converti en un signal vibrant. De plus, avec la pression du corps de contrepoids sur le dessus, par utilisation de la fixation au plan dur, le signal vibrant est réduit au signal acoustique pour exciter le plan dur afin de produire des sons.
PCT/CN2007/003876 2007-12-28 2007-12-28 Module d'excitation audio vibrant WO2009082847A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/003876 WO2009082847A1 (fr) 2007-12-28 2007-12-28 Module d'excitation audio vibrant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/003876 WO2009082847A1 (fr) 2007-12-28 2007-12-28 Module d'excitation audio vibrant

Publications (1)

Publication Number Publication Date
WO2009082847A1 true WO2009082847A1 (fr) 2009-07-09

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ID=40823749

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2007/003876 WO2009082847A1 (fr) 2007-12-28 2007-12-28 Module d'excitation audio vibrant

Country Status (1)

Country Link
WO (1) WO2009082847A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103260121A (zh) * 2013-04-08 2013-08-21 杭州电子科技大学 谐振式超磁致伸缩扬声器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2429984Y (zh) * 2000-03-28 2001-05-09 甘肃天星稀土功能材料有限公司 磁致伸缩振动发生器
CN2469648Y (zh) * 2000-12-14 2002-01-02 张茂才 超磁致伸缩材料扬声器
CN2469649Y (zh) * 2001-03-06 2002-01-02 甘肃天星稀土功能材料有限公司 磁致伸缩高保真平板扬声器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2429984Y (zh) * 2000-03-28 2001-05-09 甘肃天星稀土功能材料有限公司 磁致伸缩振动发生器
CN2469648Y (zh) * 2000-12-14 2002-01-02 张茂才 超磁致伸缩材料扬声器
CN2469649Y (zh) * 2001-03-06 2002-01-02 甘肃天星稀土功能材料有限公司 磁致伸缩高保真平板扬声器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103260121A (zh) * 2013-04-08 2013-08-21 杭州电子科技大学 谐振式超磁致伸缩扬声器

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