WO2009046682A1 - Système acoustique multimédia ayant une interface numérique à fréquence audio - Google Patents

Système acoustique multimédia ayant une interface numérique à fréquence audio Download PDF

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Publication number
WO2009046682A1
WO2009046682A1 PCT/CN2008/072668 CN2008072668W WO2009046682A1 WO 2009046682 A1 WO2009046682 A1 WO 2009046682A1 CN 2008072668 W CN2008072668 W CN 2008072668W WO 2009046682 A1 WO2009046682 A1 WO 2009046682A1
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WO
WIPO (PCT)
Prior art keywords
speaker
coil
audio
magnetic
channel
Prior art date
Application number
PCT/CN2008/072668
Other languages
English (en)
French (fr)
Inventor
Fan Zhang
Original Assignee
Fan Zhang
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
Priority claimed from CNA200710181973XA external-priority patent/CN101409853A/zh
Priority claimed from CNU2008202122770U external-priority patent/CN201274572Y/zh
Application filed by Fan Zhang filed Critical Fan Zhang
Priority to EP08837334A priority Critical patent/EP2348421A4/en
Priority to JP2011531322A priority patent/JP2012505616A/ja
Priority to KR1020117011001A priority patent/KR101618911B1/ko
Priority to AU2008310201A priority patent/AU2008310201A1/en
Priority to US13/124,120 priority patent/US9294843B2/en
Priority to EA201170576A priority patent/EA201170576A1/ru
Priority to CA2740520A priority patent/CA2740520A1/en
Publication of WO2009046682A1 publication Critical patent/WO2009046682A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/041—Voice coil arrangements comprising more than one voice coil unit on the same bobbin
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H04R3/14—Cross-over networks

Definitions

  • the present invention relates to a multimedia audio system having an audio digital interface, and more particularly to a digital multimedia sound system having a USB external sound card or an IEEE1394 external sound card and powered by a computer or a video game machine, belonging to the field of electrical electro-acoustics. Background technique
  • a multimedia audio system having an audio digital interface including a multimedia audio system having a USB external sound card or an IEEE 1394 external sound card, is a prior art.
  • PHILIPS launched the DGX320 audio system in 2006.
  • Each speaker has a 1-inch tweeter, a 2-inch full-range speaker and a passive bass radiator.
  • Power is supplied from the PC's USB interface.
  • the output power is 2 X 1W, the frequency response range is 100Hz ⁇ 20KHz.
  • Japan's EVERGREEN introduced the DN-MPS100 audio system, which includes two 3-inch speakers, a USB interface mounted on the panel, and an MP3 decoding decoder mounted on the back of the speaker and a radio inside the box. Circuit.
  • the audio input power is 2 X 7W, which is independently powered by the power grid using the included AC adapter.
  • YAMAHA introduced a NX-U10 USB audio system at CES, using two 1.5-inch mini speakers, through the "capacitor amplifier” technology and SR- Bass bass.
  • Enhanced technology that stores the energy provided by the notebook PC's USB interface on a set of capacitor plates to meet the explosive power demand for low audio output. Its frequency response range is 90Hz ⁇ 20KHz.
  • USB mini-audio systems based on USB audio digital decoders (DACs) and 2 to 4 mini speakers and a set of digital or analog power amplifiers have been used in domestic and foreign markets.
  • DACs USB audio digital decoders
  • 2 to 4 mini speakers and a set of digital or analog power amplifiers have been used in domestic and foreign markets.
  • such products have poor sound quality and low volume, which cannot meet the consumer's requirements.
  • the output voltage of the PC USB interface is DC5V ⁇ 5%, and the output current is 500mA. That is, the rated continuous power that each USB interface can provide is only 2. 5W.
  • a 2" calibre speaker has a rated continuous input power of 2 ⁇ 4W and an SPL value of up to 83dB/lW/lm.
  • a 1.25 ⁇ 1. 5 inch calibre speaker has a rated continuous input power of approximately 1 ⁇ 3W and a SPL value of typically 79 ⁇ 82dB/lW/lm.
  • a 3-inch calibre speaker has a rated continuous input power of approximately 5 to 8 W, and its SPL value is difficult to exceed 85 dB/lW/ln! .
  • the 3-inch caliber speaker has a lower resonant frequency F Formula, the acoustic reduction quality of the bass band is much better than that of a mini speaker below 2 inches.
  • the audio manufacturer prefers to choose a relatively poor 2-inch or smaller sound quality.
  • the caliber speaker acts as the sounding unit of the USB audio. The reason is: The power of the 2 x 1W power output of the computer USB audio system power amplifier is difficult to push a pair of 3 inch caliber speakers to work properly and get enough volume and good sound quality.
  • the electroacoustic conversion efficiency of a 2-inch calibre speaker is only 0.125%. That is to say: When this speaker inputs 1W of electric power, only 0.
  • the existing mainstream speakers ie, moving coil speakers (hereinafter referred to as “speakers”)
  • speaker moving coil speakers
  • the prior art is limited by the back electromotive force distortion and cannot improve the efficiency of the speaker.
  • the prior art can implement a full-range medium and small-caliber speaker.
  • the prior art does not enable such full-range loudspeakers to have a performance-price ratio that is generally accepted by consumers and to achieve mass industrial production.
  • the root cause is:
  • the impedance of the speaker is a function of the operating current frequency of the speaker: The lower the frequency, the lower the impedance, the higher the frequency, the higher the impedance.
  • the high audible current flowing through the coil has a much lower rms value than the low audio current. Therefore, the sound pressure generated by this speaker in the high-frequency section is significantly reduced compared to the bass band.
  • the quality of the speaker vibration system can be compensated by technical means.
  • the resonant frequency of such small-caliber loudspeakers is F. Inevitably high, it is difficult to obtain a satisfactory low-tone electro-acoustic reduction effect. For speakers with a diameter of 3 inches or more, as the unit diameter increases, F. It will be dive to the bass band to improve the low audio reproduction quality of the speaker.
  • PC USB audio has some recognized advantages. For example: 1) Using a USB external sound card, you can completely get rid of the electromagnetic wave interference generated by the transformer and electric fan in the computer case; 2) Decoding encoder based on PCM/PWM audio digital technology and class D audio power amplifier or based on DPPTM patent technology Class I audio power amplifier with IBit ⁇ - ⁇ digital-to-analog conversion technology, compared with analog audio system, complex filter, R/C DC-blocking network and Class AB power amplifier, anti-jamming, amplifier efficiency, signal-to-noise ratio , dynamic range and other aspects have better performance than analog audio systems; 3) So far, the computer's PCI mainstream sound card has only 16 Bi t digital-to-analog and analog-to-digital conversion accuracy, and many "USB mini speakers" USB simplex sound card, its DAC often has 20 Bit conversion accuracy; 4) USB universal serial bus is lower than PCI parallel bus, but with the continuous improvement of CPU performance, especially the emergence of dual-core and 4-core
  • a first object of the present invention is to overcome the technical bias and the deficiencies of the prior art, and to provide a single-mode full-band multi-magnetic power supply powered by a USB/IEEE 1394 interface using a resistive load characteristic or a resistive load characteristic.
  • the multi-coil speaker constitutes a 2.0-channel digital multimedia sound system with high efficiency, energy saving, high efficiency and high fidelity.
  • a second object of the present invention is to overcome the technical bias and the deficiencies of the prior art, and to provide a single-mode full-band multi-magnetic power supply powered by a USB/IEEE 1394 interface using a resistive load characteristic or a resistive load characteristic.
  • the multi-coil speaker constitutes a 2.1-channel digital multimedia sound system with high efficiency, energy saving, high efficiency and high fidelity.
  • a third object of the present invention is to overcome the technical bias and the deficiencies of the prior art, and to provide an audio/digital signal supplied by a separate AC/DC power supply, provided by a USB/IEEE 1394 interface, using a resistive load characteristic or similar to
  • the single-diaphragm multi-band multi-magnetic gap multi-coil loudspeaker with resistive load characteristics constitutes a 4. ⁇ 7. 1 channel digital multimedia sound system with high efficiency, energy saving, high efficiency and high fidelity quality.
  • a fourth object of the present invention is to overcome the deficiencies of the prior art and to further improve and limit the technical features of the existing multi-magnetic gap multi-coil loudspeaker. Eliminates the generator effect and back EMF of the loudspeaker, providing a range of full-range loudspeakers with ultra-high efficiency and high fidelity quality, especially providing ultra-high efficiency and low distortion with resistive load characteristics or similar to resistive load characteristics. Subwoofer.
  • a multimedia audio system having an audio digital interface, including at least one USB interface/or IEEE1394 interface/or coaxial cable interface/or optical interface of a computer/playing game console PS2, a set of 2.0 connected to a USB/IEEE 1394 interface.
  • the volume adjustment devices of the amplifiers are all mounted on/or connected to the PCB by wires and connectors, the PCB boards being fixedly mounted in the left channel speaker/or the speaker bracket, the LED signal lights and the volume
  • the adjusting device is fixed on the left channel speaker panel or the speaker bracket, and the PCB board or the left channel speaker panel is further provided with an interface
  • a matching socket/or a plug of an interface extension cord is connected to the interface of the computer/player game console PS2, and the right channel speaker panel is also provided with an audio jack, an audio cable
  • the left and right channel speakers are connected to form a 2.0 channel audio system;
  • the 2.0 channel external sound card has at least one simplex 16 ⁇ 48 bit stereo digital-to-analog decoder DAC, and the DAC and the IC chip are powered by a 5V power supply of the computer USB interface and are closest to the
  • the DAC and the IC chip power input pin are respectively connected in parallel with a set of electrolytic capacitors having both filtering and energy storage functions, and the lower limit value of the rated operating voltage of the audio power amplifier is specified to be lower than the rated operating voltage of the DAC. 1.
  • V 2. 7V so that the speaker outputs a large dynamic low audio signal of sufficient width, the instantaneous working voltage of the audio power amplifier and the DAC does not substantially exceed the lower limit of the rated operating voltage;
  • the left and right channel speakers are respectively provided with at least one multi-magnetic gap multi-line ⁇ speaker having a resistive load characteristic or a resistance load characteristic, and the multi-magnetic gap multi-coil speaker is specified to have only one ⁇ 7 inch diameter conical shape.
  • a diaphragm/or a concave diaphragm which stipulates that the diameter of the mesopores of the conical diaphragm does not exceed ⁇ 26 ⁇ ⁇ 33 ⁇ , thereby constituting two coaxial vocalizations, the multi-magnetic gap multi-coil speaker
  • the inductance and its counter electromotive force induced during reciprocation are full-band speakers that cancel each other by a 180 degree phase angle;
  • the rated operating voltage of the audio power amplifier is DC 5.25V/ or DC 8 ⁇ 15V, and the rated continuous output power of each channel of the audio power amplifier is 3 ⁇ 4 ⁇ 1W/ or 3 ⁇ 4 ⁇ 2W, thereby forming a USB interface/ Or a 2.0-channel digital multimedia audio system with ultra-high sensitivity and high fidelity quality powered by the IEEE1394 interface.
  • a multimedia audio system having an audio digital interface, including at least one USB interface/or IEEE1394 interface/or coaxial cable interface/or optical interface of a computer/playing game console PS2, a set of 2.1 connected to a USB/IEEE 1394 interface a channel external sound card and a matching class D/or class 2.
  • the volume adjustment device of the 1-channel audio power amplifier is mounted on the PCB board, the PCB board, the LED signal lamp, the volume adjustment device is installed in the subwoofer/or its panel, the PCB board / or the panel of the subwoofer is further provided with a socket matching the interface / or a plug through an interface extension cord is connected to the interface of the computer / or the disc game machine PS2, the left and right sound
  • the audio speaker socket is also provided with an audio socket, and the two audio cables connect the left and right channel speakers and the subwoofer to a 2. 1 channel sound system;
  • the 2.1 channel external sound card has at least one simplex 16 ⁇ 48 bit 2.
  • 1 channel digital-to-analog decoder DAC wherein left and right channel signals are connected to the left and right channel audio power via the DAC
  • An amplifier IC chip, the other subwoofer channel analog signal is connected to the subwoofer audio power amplifier via an electronic frequency divider having a passband bandwidth of 20 Hz to a maximum of 250 Hz;
  • the DAC and the left and right channel audio power amplifiers are provided with a 5V power supply by a USB interface of the PC, and the subwoofer audio power amplifier is provided with a 5V power supply by another USB interface of the PC;
  • the computer is a Mac
  • the DAC, the left and right channel audio power amplifier, the electronic frequency divider, and the subwoofer power amplifier are all provided with a DC 8 ⁇ 15V power supply by the same IEEE1394 interface;
  • the DAC and the left and right channel audio power amplifier IC chips are powered by a 5V power supply of a computer USB interface and are respectively connected in parallel with a set of electrolytic capacitors having both filtering and energy storage functions at the input pins of the DAC and the IC chip power supply.
  • the lower limit value of the rated operating voltage of the audio power amplifier is lower than the lower limit value of the rated operating voltage of the DAC by 1. 2V, so that the speaker outputs a large dynamic low audio signal of sufficient width.
  • the instantaneous operating voltage of the audio power amplifier and the DAC does not substantially exceed the lower limit of the operating voltage.
  • the subwoofer audio power amplifier IC chip is separately connected in parallel with a set of electrolytic capacitors having a capacity of 1 000 ⁇ 100,000 ⁇ with both filtering and energy storage functions;
  • the left and right channel speakers are respectively provided with at least one multi-magnetic gap multi-line ⁇ speaker having a resistive load characteristic or a resistance load characteristic, and the multi-magnetic gap multi-coil speaker is specified to have only one ⁇ 7 inch diameter conical shape.
  • a diaphragm/or a concave diaphragm which stipulates that the diameter of the mesopores of the conical diaphragm does not exceed ⁇ 26 ⁇ ⁇ 33 mm, thereby constituting two coaxial common point sounding, and the multi-magnetic gap multi-coil speaker
  • the inductance and its back-EMF induced during reciprocation are due to a full-band speaker that cancels each other with a 180-degree phase angle.
  • the subwoofer is provided with a multi-magnetic gap multi-coil speaker having a resistive load characteristic or a resistance load characteristic
  • the multi-magnetic gap multi-coil speaker is provided with only one conical diaphragm of ⁇ 7 inch diameter/ a concave diaphragm, which stipulates that the diameter of the mesopores of the conical diaphragm does not exceed ⁇ 26 ⁇ 33 mm, thereby forming a coaxial common point vocalization, the inductance of the multi-magnetic gap multi-line ⁇ speaker and a counter-electromotive force induced during reciprocation due to a 180 degree phase angle that cancels each other with a subwoofer;
  • the rated operating voltage of the audio power amplifier is DC 5.25V/ or 3 ⁇ 4 ⁇ DC 8 ⁇ 15V, and the rated continuous output power of each channel of the left and right channel audio power amplifier is ⁇ 1W/ or ⁇ ⁇ 2W, The rated continuous output power of the subwoofer audio power amplifier ⁇ ⁇ 2W / or ⁇ ⁇ 4W, thus forming a 2.1-channel digital multimedia audio with ultra-high sensitivity and high fidelity quality powered by the USB interface / or IEEE1394 interface system.
  • a multimedia audio system having an audio digital interface, including at least one USB interface/or IEEE1394 interface/or coaxial cable interface/or optical interface of a computer/player game console PS2, a set of 4. 1 connected to a USB/IEEE 1394 interface ⁇ 7.
  • the volume adjustment device of the 1-channel audio power amplifier is mounted on the PCB board, and the PCB board, the LED signal lamp, and the volume adjustment device are all mounted in the subwoofer/or its panel
  • the PCB board/or the subwoofer speaker surface fei is further provided with a socket matched with the interface and/or connected to the interface of the computer/player game console PS2 through a plug of an interface extension cord.
  • the 4 ⁇ 7 satellite speakers also have an audio socket on the panel, and 4 ⁇ 7 audio cables connect the 4 ⁇ 7 satellite speakers and the subwoofer to a 4. 7. 7. channel audio.
  • the 4. ⁇ 7. 1-channel external sound card has at least one simplex 16 8 Bit 4. ⁇ 7. 1 channel digital-to-analog decoder DAC, wherein the 4-channel signal is connected to the matched via the DAC The 4 ⁇ 7 channel audio power amplifier IC chip, and another subwoofer channel analog signal is connected to the subwoofer audio power amplifier via an electronic frequency divider having a frequency bandwidth of 20 Hz to a maximum of 250 Hz; The 4. ⁇ 7.
  • 1-channel external sound card is powered by the USB interface or the IEEE 1394 interface, the 4-7 channel audio power amplifier, the subwoofer audio power amplifier, the control protection circuit/or micro
  • the processor IC chip is independently powered by an AC/DC power supply disposed in the subwoofer, and the DAC and the 4-channel audio power amplifier IC chip are respectively connected in parallel with the DAC and the IC chip power input pin.
  • a set of electrolytic capacitors having both filtering and energy storage functions, such that the audio power amplifier and the instantaneous operating voltage of the DAC substantially do not exceed the rated operating voltage when the speaker outputs a large dynamic low audio signal of sufficient width Limit
  • Each of the 4 to 7 satellite speakers is provided with at least one multi-magnetic gap multi-coil speaker having a resistive load characteristic or a similar resistance load characteristic, and the multi-magnetic gap multi-coil speaker is prescribed only one ⁇ 7 inch diameter cone a diaphragm or a concave diaphragm, which stipulates that the diameter of the mesopores of the conical diaphragm does not exceed ⁇ 26 ⁇ ⁇ 33 ⁇ , thereby constituting 7 coaxial coaxial sounds, and the multiple magnetic gap multi-coil
  • the inductance of the speaker and its counter electromotive force induced during reciprocation are full-band speakers that cancel each other by a phase angle of 180 degrees;
  • the subwoofer is provided with a multi-magnetic gap multi-coil speaker having a resistive load characteristic or a resistance load characteristic
  • the multi-magnetic gap multi-line speaker is provided only with a conical diaphragm of 3 ⁇ 4 ⁇ ⁇ 10 inch diameter. / or a concave diaphragm, which stipulates that the diameter of the mesopores of the conical diaphragm does not exceed ⁇ 26 ⁇ 33 mm, thereby forming a coaxial common point vocalization, the inductance of the multi-magnetic gap multi-coil speaker and a counter-electromotive force induced during reciprocation due to a 180 degree phase angle that cancels each other out of a subwoofer;
  • the rated continuous output power per channel of the 4 ⁇ 7 channel audio power amplifier is ⁇ 1W
  • the rated continuous output power of the subwoofer audio power amplifier is 4W ⁇ 8W, thereby forming an independent AC/DC power supply.
  • Powered by ultra-high sensitivity and high fidelity quality 4. Wide 7. 1 channel digital multimedia audio system.
  • a multimedia audio system having an audio digital interface, all components and devices installed in the subwoofer except the subwoofer, can be separated from the subwoofer to form an independent power amplifier;
  • the panel of the amplifier is provided with a necessary indicating adjustment device, an audio input interface and an audio output socket, and the four satellite speakers and the subwoofer are respectively provided with an audio socket on the panel, and 5 to 8 audio cables are provided.
  • the independent power amplifier is connected to the (4+1) ⁇ (7+1) speakers to form a 4. 1 (+1) ⁇ 1 (+1) channel digital multimedia sound system.
  • the multi-magnetic gap multi-coil speaker is a dual magnetic gap double coil speaker, the speaker having two coaxially mounted and symmetrically disposed upper and lower plates,
  • the upper plate and the lower plate are two circular flat plates having a central shaft hole, and a ring-shaped magnet/NdFeB magnet magnetized in a thickness direction is sandwiched between the upper plate and the lower plate 5 ⁇
  • the outer surface of the upper and lower plates is 0.
  • the outer circumferential surface of the annular cylindrical yoke and the vertical peripheral surface of the central plate hole of the upper and lower plates constitute two coaxial equal diameters a circular magnetic gap in which two coils of coaxial equal diameter are inserted, the coil is wound by a layer of one or two layers of electromagnetic wires, and the two coils are provided with corresponding intervals Determining the direction of the winding of the two coils and the current flowing through the coil, so that the two coils are in the same F for instantly generate electric power in the same direction;
  • the central axis of the central shaft hole of the upper plate and the lower plate is a vertical symmetry axis, and the bisector X-X axis of the one-half axial height of the magnet/NdFeB magnet is a horizontal symmetry axis
  • the speaker has two sets of symmetric magnetic circuits that are bilaterally symmetrical in terms of geometry and magnetic properties,
  • the bisector X-X axis of one of the axial heights is a horizontal symmetry axis, and the speaker has two sets of upper and lower symmetrical coil circuits, thereby constituting a double magnetic gap having a resistive load characteristic or a resistance load characteristic. Dual coil external magnetic full-range speaker or with a subwoofer.
  • the multi-magnetic gap multi-coil loudspeaker is a dual-magnetic double-coil loudspeaker, the loudspeaker having two coaxially mounted and symmetrically disposed upper and lower plates,
  • the upper plate and the lower plate are two circular plates, and a disk-shaped magnet/NdFeB magnet magnetized in a thickness direction is sandwiched between the upper plate and the lower plate and matched with each other. 5 ⁇ 8 ⁇
  • the outer rim of the upper and lower plates of the upper and lower plates are respectively 0.
  • the speaker has two sets of symmetric magnetic circuits which are bilaterally symmetrical in terms of geometry and magnetic properties, and stipulate the cross-sectional area of the electromagnetic wires of the two sets of the turns, the number of turns, the coil volume, the coil resistance, and the inductance of the turns.
  • the absolute value of the quantity and the tension at the time of winding are equal to each other, and the bisector X XY axis of the one-half axial height of the magnet/NdFeB magnet is a horizontal symmetry axis, and the speaker has two groups of upper and lower A symmetrical coil circuit, thereby constituting a double magnetic gap double-line internal magnetic full-range speaker or a subwoofer having a resistive load characteristic or a resistance load characteristic.
  • the multi-magnetic gap multi-coil speaker is a three-magnetic gap three-coil speaker, and a ⁇ 2 ⁇ in a thickness direction is mounted on a plane of each side of a circular plate made of a magnetic material a magnetized polarized disk-shaped magnet/or a neodymium-iron-boron magnet having the same polarity on a side close to the plate, and a ⁇ magnetic material is respectively mounted on the outer plane of the magnet a circular plate, thereby forming a pair of repulsive magnets, the coaxially mounted three circular plates having the same projected area and matching the projection plane of the two coaxially mounted magnets, one 5 ⁇ 8 ⁇ symmetric, respectively, the outer circumference of the outer circular plate is 0.
  • a magnetic gap magnetic circuit an inner circumferential surface of the annular yoke and a vertical circumferential surface of the circular plate form three coaxial equal-diameter annular magnetic gaps, and electromagnetic waves are inserted into the annular magnetic gap
  • the speaker has two sets of symmetric magnetic circuits which are left and right and symmetrical in terms of geometric shape and magnetic properties, and set the wire ⁇ resistance, the wire ⁇ coil, the absolute value of the wire ⁇ sense, and the winding
  • the tensions are equal to each other, with the bisector of the one-half axial height of the center plate - the X axis is a horizontal axis of symmetry, and the speaker has two sets of upper and lower symmetrical coil circuits, thereby constituting one A three-gap three-coil magnetic full-range speaker or a subwoofer with a resistive load characteristic or a resistance load characteristic.
  • a multimedia audio system having an audio digital interface
  • the three axial plates of the three magnetic gap three-coil inner magnetic speaker and the axial portions of the two magnets are provided with central shaft holes having the same projected area
  • the axial portion of the bracket made of a non-magnetic material of the speaker is also provided with a central shaft hole or a matching screw hole having a projected area equal to that of a non-magnetic material. Passing through the shaft hole/or matching screw hole and applying a sufficient static pressure to the plate and the magnet using a pressure plate made of a non-magnetic material matched to the plate It is fixed to the bracket of the speaker.
  • the multi-magnetic gap multi-coil speaker is a four-magnetic four-coil speaker/or four or more magnetic gaps with four or more turns, the speaker having a ⁇ magnetic material a circular plate on which a disk-shaped magnet/NdFeB magnet magnetized and polarized in the thickness direction is mounted on a plane of both sides of the circular plate, the magnet being in close proximity to the circle
  • One side of the shaped plate has the same polarity, and the outer surface of the magnet is respectively mounted with a circular plate made of ⁇ magnetic material, thereby forming three pairs of three or more pairs of repulsive magnets.
  • the coaxially mounted four pieces or four or more circular plates have the same projected area and match the projection plane of the three/three or more magnets coaxially mounted, one with the circular plate
  • the central axis of the ring-shaped yoke coaxially mounted on the outer side of the outer circular plate is 0. 5 ⁇ 8 ⁇ meters and forms two sets of upper and lower symmetrical magnetic gap magnetic circuits, one Coaxial mounting with the repulsive magnet
  • Four or more than four coaxial equal-diameter annular magnetic gaps are formed between the inner circumferential surface of the annular yoke and the vertical circumferential surface of the circular plate, and electromagnetic lines are inserted in the annular magnetic gap.
  • the speaker has three groups of three or more symmetrical magnetic circuits that are bilaterally symmetrical in terms of geometry and magnetic properties,
  • the turns 609 609 and 609C When the turns 609 609 and 609C have a clockwise direction when viewed from the outside of the diaphragm, the turns 609 ⁇ and 609 D must have a counterclockwise direction, and vice versa, the end ⁇ of the line ⁇ ⁇
  • the head end ⁇ of the coil 609 ⁇ is connected in series
  • the tail end ⁇ of the coil ⁇ ⁇ is connected in series with the head end XC of the coil 609C
  • the tail end YD of the coil 609D forms a pair of signal input terminals of the transducer along the vertical axis I of the bobbin and the head end M of the coil 609A, and the coils 609A and 609D are defined.
  • the tensions at the time of the line are equal to each other, and the bisector X-X axis of the one-half axial height of the centering magnet is a horizontal symmetry axis, and the speaker has two sets of upper and lower symmetrical turns, thereby forming a Four magnetic gap four coils with resistive load characteristics or similar to resistive load characteristics
  • the magnetic gap and the magnetic coil is a multi-band speakers or subwoofer with formula.
  • a multimedia sound system having an audio digital interface, four or more than four or more of the inner magnetic speakers of the four magnetic gap four coils/or more magnetic gaps and coils, and three or more
  • the axial center portions of the magnets are each provided with a central shaft hole having an equal projection area
  • the axial center portion of the bracket of the speaker made of a non-magnetic material is also provided with a central shaft hole having a projected area equal thereto.
  • a fastener made of non-magnetically permeable material passes through the shaft hole / or matching screw hole and utilizes a pair of pressure plates made of a non-magnetic material matching the plate The plates and the magnets apply sufficient static pressure and bond them to the bracket of the speaker.
  • FIG. 1 Block diagram of a 2-channel multimedia audio system with an audio digital interface.
  • FIG. 1 Block diagram of a 2-channel multimedia audio system with an audio digital interface.
  • Figure 3 Block diagram of an integrated analog-to-digital converter and digital audio power amplifier.
  • FIG. 1 Block diagram of a 5-channel multimedia audio system with an audio digital interface.
  • Figure 5 A longitudinal section view of an embodiment of a dual magnetic gap dual coil outer magnetic loudspeaker.
  • Figure 6 A longitudinal section view of an embodiment of a dual magnetic gap two-wire internal magnetic speaker.
  • Figure 7 A longitudinal section view of an embodiment of a three-gap three-coil inner magnetic speaker.
  • Figure 8 A longitudinal section view of an embodiment of a four-gap four-coil inner magnetic speaker.
  • FIG. 1 Schematic diagram of the magnetic flux lines of the prior art outer plates.
  • FIG. 10 Schematic diagram of the distribution of magnetic flux lines of the outer plates of the present invention.
  • Figure 11 Schematic diagram of the working principle of counter-electromotive force canceling each other in a symmetrical magnetic circuit and a symmetrical line ⁇ circuit.
  • Figure 15 Wiring diagram of the four-gap four-coil speaker coil circuit principle.
  • Figure 18 Schematic diagram of the installation of the magnetic speaker core and bracket in a three-gap three-coil.
  • Figure 19 Schematic diagram of the installation of the magnetic speaker core and bracket in a four-gap four-coil.
  • Figure 20 Schematic diagram of the working principle of the audio current and back electromotive force of the prior art single-gap single-coil speaker.
  • Figure 21 Schematic diagram of the operation principle of the multi-magnetic gap multi-turn ⁇ speaker audio current and back electromotive force with symmetric magnetic circuit and symmetric line ⁇ circuit. Corresponding relationship between the main components of the present invention and Figs. 6 to 15, 18 and 19:
  • Non-magnetic magnetic bracket -18 wide 681; convex circular platform 1118 ⁇ 6118 in bracket; convex circular flat surface in bracket - -11180 ⁇ 61180: bracket annular thin wall vertical positioning surface - - 1820 ⁇ 6820; Bracket horizontal positioning surface - 1810 ⁇ 6810; adhesive - 181 wide 6811; ... elastic wave - 14 wide 641; diaphragm - - - - 106 ⁇ 606;
  • Figure 1 is a block diagram showing a 2.0 channel multimedia audio system having an audio digital interface of the present invention.
  • Component 1 is a computer or video game console PS2 that passes through a USB interface/or IEEE1394 interface/or coaxial cable interface/or fiber interface to an audio digital decoder (DAC) 2 and a set of class D/or class T audio power Amplifier 3 provides 5V/ or 8 ⁇ 12V DC power and audio digital signal levels.
  • DAC audio digital decoder
  • Class D / or Class T power amplifier 3 output continuous power of 2 X 1W 2. 0 channel audio analog power, after the left speaker 4 and then to the right speaker 5. Its basic structure and working principle are the same as those of the prior art USB sound system.
  • FIG. 2 is a block diagram of a 2-channel multimedia audio system having an audio digital interface of the present invention.
  • the component 5 is the same as the component ⁇ 5 of Fig. 1.
  • Component 6 is a subwoofer (subwoofer), and component 8 is an electronic crossover with a passband selected from 20 Hz to 250 Hz.
  • Component 7 is a Class D / or Class T subwoofer audio power amplifier
  • component 9 is another set of USB interfaces for the same PC or CD game console PS2, providing independent DC5V power for the subwoofer audio power amplifier. If you use the USB 2.0 interface standard, the maximum continuous input power of the left and right channel speakers in Figure 2 is about 2 X 1W, and the maximum continuous input power of the subwoofer is about 3 ⁇ 4 ⁇ I X 2W. If the USB 3. 0 interface standard is used, the maximum continuous input power of the 2-channel multimedia sound system of Figure 1 is approximately 3 ⁇ 4 ⁇ 2 X 2W, and the maximum continuous input power of the subwoofer is approximately 1 X 4W.
  • Figure 3 shows a block diagram of an integrated analog-to-digital converter and digital audio power amplifier.
  • the audio digital decoder (DAC) 2 and a set of class D/or class T audio power amplifiers 3 are integrated in the same IC chip.
  • the CM6120S IC chip of ⁇ integrates the DAC and the left and right channel audio power amplifier 3 and the corresponding crystal circuit, overload thermal protection, short circuit protection and other auxiliary circuits in the same IC chip.
  • Element 4 is a block diagram of a 5.1 channel multimedia audio system having an audio digital interface of the present invention.
  • Element 1, Element 2, Element 3 are identical to Element 1, Element 2, Element 3 shown in Figure 1.
  • Components 4 through 8 are 5 satellite speakers, left front, center, right front, left surround and right surround speakers.
  • Element 11 is an electronic frequency divider whose bandwidth is selected from 20 Hz to 250 Hz as needed.
  • Component 10 is a Class D/or Class T subwoofer audio power amplifier whose analog output current is coupled to subwoofer 9.
  • Component 13 is a separate AC/DC power supply or battery pack that provides the necessary DC power for all components or components other than component 2.
  • the present invention is equally applicable to the 4.1, 7. 1 channel digital multimedia sound system as long as the appropriate number of satellite speakers is selected.
  • Figure 5 is a longitudinal cross-sectional view showing an embodiment of the double magnetic gap double-wire external magnetic speaker of the present invention.
  • the magnetic gaps 210A and 210B are inserted into the two coils 209A and 209B of coaxial equal diameter in the two annular magnetic gaps, and the coils are wound by one layer or two layers of electromagnetic wires, and two coils 209A and 209B There is a corresponding interval between the two turns and the direction of the current flowing through the turns, so that the two turns 209A and 209B generate the same direction of electric power F at the same working moment ; the upper plate 203A and the lower pole
  • the central axis of the central shaft hole of the plate 203B is a vertical symmetry axis, and the bisector X X axis of the one-half axial height of the neodymium iron boron magnet is a horizontal symmetry axis, and the speaker has geometric shape and magnetic properties.
  • Two sets of symmetric magnetics that are symmetrical left and right
  • the path, the electromagnetic wire cross-sectional area of the two coils 209A and 209B, the number of coil turns, the coil coil, the coil resistance, the absolute value of the coil inductance, and the tension at the time of winding are defined to be equal to each other, with the neodymium iron boron magnet
  • the bisector X ⁇ X $ of one of the axial heights is a horizontal symmetry axis, and the speaker has two sets of upper and lower symmetrical coil circuits, whereby the inductance of the two coils 209A and 209B of the embodiment of the present invention
  • the back electromotive force induced during the reciprocating motion cancels each other by having a phase angle of 180 degrees.
  • the speaker described in this embodiment is a multi-magnetic gap multi-line speaker having a resistive load characteristic or a resistance load characteristic and having ultra-high sensitivity and high fidelity quality.
  • Figure 6 is a longitudinal cross-sectional view showing an embodiment of a dual magnetic gap double coil inner magnetic speaker of the present invention.
  • the upper plate 103A and the lower plate 103B are two circular plates of equal thickness, equal projected area, and coaxially mounted, and a matching neodymium iron boron magnet 102 is sandwiched between the element 103A and the element 103B.
  • An axial position of the bracket 181 made of an aluminum alloy is provided with an inner convex circular platform 1118 having a smooth and uniform vertical outer circular surface whose diameter matches the diameter of the members 103A and 103B.
  • the outer side of the element 1118 is provided with an annular groove 1631, and a plurality of uniformly arranged penetrating holes 182 are provided at the bottom of the groove.
  • the outer side of the element 1631 is an annular thin wall of the bracket 181, which has a smooth and regular inner and outer circular vertical plane.
  • a smooth and tidy horizontal positioning surface 1810 and a vertical positioning surface 1820 are also provided at a certain axial height of the annular thin wall of the bracket 181.
  • An adhesive is applied over the horizontal mounting surface 11180 of the component 1118 to bond the magnetic cores that have been bonded together and magnetically polarized: the component 103A, the component 102, and the component 103B are placed over and ensure that the axis positioned on the component 11180 is mounted. Heart part. After the adhesive is cured, the annular yoke 113 is placed on the coaxial portion of the magnetic core and simultaneously bonded and fixed to the axial center of the bracket 181.
  • the two upper and lower end faces of the element 113 are respectively
  • the outer surface of the elements 103A and 103B has the same H value (0_8 mm), and the inner peripheral surface of the element 113 and the vertical peripheral surfaces of the elements 103A and 103B constitute two coaxial equal-diameter annular magnetic gaps 110A and 110B.
  • the upper end portion of the member 113 is embedded in a circular shaft hole at the bottom of the plastic frame 101, and the outer wall of the member 113 is bonded and fixed by the adhesive to the flange 1011 at the bottom of the frame.
  • a coil bobbin 107 and two coaxially mounted coils 109A and 109B are inserted into the annular magnetic gap, and the two coils are wound by a layer of one or two layers of electromagnetic wires, for example, when viewed from the direction of the diaphragm 106.
  • the set coil 109A is wound clockwise, and the turn 109B is wound counterclockwise (or vice versa).
  • the electromagnetic wire cross-sectional area of the coil 109A and the coil 109B, the coil coil, the coil coil, the coil resistance, the absolute value of the coil inductance, and the tension at the time of winding are defined to be equal to each other, thereby constituting one-half of the element 102.
  • the bisector of the axial height X--X axis is a horizontal symmetry axis, two sets of magnetic circuits with upper and lower symmetry in geometry and magnetic properties with the central axis of the element 103A, the element 102 and the element 103B being perpendicular to the axis of symmetry And coil circuit. Then, the elastic wave 141, the bobbin 107, the diaphragm 106, the suspension 199, and the frame 101 are bonded and fixed, respectively.
  • the H value is appropriately selected according to the diameter and magnetic path of the speaker.
  • the two sets of magnetic gap symmetric magnetic circuits with the zonal Z--Z axis of the one-half axial height of the element 103A and the element 103B are obtained, and the magnetic lines 1991 in the magnetic gap are as shown in FIG.
  • the inductances of the two turns 109A and 109B of the present embodiment and the counter electromotive force induced during the reciprocating motion cancel each other by having a phase angle of 180 degrees.
  • the speaker according to the embodiment of the present invention is a multi-magnetic gap multi-coil speaker having a resistive load characteristic or a resistance load characteristic and having ultra-high sensitivity and high fidelity quality.
  • Fig. 12 is a circuit diagram showing the principle of the double magnetic gap double coil speaker coil circuit of the present invention.
  • the electromagnetic wire cross-sectional area of the coil 109A and the coil 109B, the number of coil turns, the coil coil, the coil resistance, the absolute value of the coil inductance, and the tension at the time of winding are equal to each other but opposite to each other,
  • the vector value of the inductance I L109A I formed when the audio current flows through the coils 109A and 109B is equal to the vector value of I L109B
  • the speaker has a resistive load characteristic or a similar resistance load characteristic. Needless to say, the external magnetic speaker of the embodiment of Fig. 5 can also be implemented as follows.
  • Figure 7 is a longitudinal cross-sectional view showing an embodiment of a three-gap three-coil inner magnetic speaker of the present invention.
  • An axially magnetized neodymium iron boron magnets 302A and 302B are respectively bonded to the planes of the two sides of a circular plate 303B, and a circular plate 303A and 303C are respectively bonded to the outer sides of the magnets 302A and 302B.
  • the polarities (N-pole and S-pole) of the two magnets are as shown in Fig. 7.
  • the three plates have the same projected area and are matched with two magnets.
  • the thickness of the elements 303A and 303C are equal, and the thickness of the element 303B is smaller than that of the element 303A. The thickness is large enough to ensure that the lines of magnetic force flowing through it are not saturated.
  • the magnetic core is placed on the inner convex circular plate surface 31180 of the aluminum alloy bracket 381 which is previously coated with the adhesive, and the necessary tooling ensures that the magnetic core and the annular yoke 313 are coaxial.
  • the two upper and lower end faces of the element 313 have the same H value (0-8 mm) as the outer pole faces of the elements 303A and 303C, and the inner circumference of the element 313 and the vertical circumference of the element 303A, the element 303B, and the element 303C.
  • Three annular magnetic gaps 310A, 310B and 310C of coaxial equal diameter are formed between the faces.
  • the upper end of the member 313 is bonded to a plastic flange 3012 which has the same mounting plane.
  • the lower end portion of the member 313 is embedded in the horizontal positioning surface 3810 and the vertical positioning surface 3820 of the aluminum alloy bracket 381 and is made of an adhesive. Bonded and fixed.
  • the coil bobbin 307 and the coaxially mounted three coils 309A, 309B and 309C are inserted into the annular magnetic gap, and the three coils are wound by a layer of one or two layers of electromagnetic wires, for example, from the vibration.
  • the set turns 309A and 309C are clockwise, and the coil 309B is turned counterclockwise (or vice versa).
  • the tail end YA of the element 309A is connected in series with the head end XB of the element 309B
  • the tail end YB of the element 309B is connected in series with the head end C of the element 309C
  • the tail end YC of the element 309C is vertically introduced along the element 307 and the head end of the element 309A.
  • the XA constitutes a pair of signal input terminals of the speaker, and the cross-sectional areas of the electromagnetic wires of the elements 309A, 309B, and 309C are equal to each other, and the number of turns of the elements 309A and 309C, the coil of the coil are specified.
  • the absolute values of the coil resistance and the inductance of the coil are equal to each other, and the number of turns of the component 309B, the winding width of the coil, the resistance of the coil, the absolute value of the inductance of the coil, and the number of turns of the components 309A and 309C, and the line are specified.
  • Line X—X axis is two sets of symmetric magnetic circuits and two sets of symmetric coil circuits with horizontal symmetry axes.
  • the specific magnetic circuit structure and the circuit diagram of the three coils are respectively shown in FIG. 13A and FIG. 13B or FIG. 14A and FIG. 14B of the present invention (for details, please refer to the related patent of the TO 99/31931 patent family proposed by the inventor. The literature is not repeatedly described in the present invention).
  • the elastic wave 341, the bobbin 307, the diaphragm 306 and the suspension 399, the dust cap 305, and the frame 301 are respectively bonded and fixed together, thereby, the three turns 309A, 309B, and 309C of the embodiment of the present invention
  • the inductance and its back electromotive force induced during reciprocating motion cancel each other out due to a phase angle of 180 degrees.
  • the speaker according to the embodiment of the present invention is a multi-magnetic gap multi-coil speaker having a resistive load characteristic or a resistance load characteristic and having ultra-high sensitivity and high fidelity quality.
  • Figure 8 is a longitudinal cross-sectional view showing an embodiment of a four-gap four-coil inner magnetic speaker of the present invention.
  • the frame is a frame 601 made of an aluminum alloy.
  • the shaft portion of the frame 601 is provided with at least two circular shaft holes, and the 601 is provided with an annular platform surface on which two elastic waves 641 are mounted at different axial heights.
  • a ⁇ axially magnetized neodymium iron boron magnets 602A and 602B are bonded to the planes of the two sides of a plate 603B, and the magnets have the same S pole polarity on the side close to the plate 603B, two The outer pole faces of the magnets 602A and 602B are respectively bonded to a ⁇ thick plate 603A and 603C, the neodymium iron boron magnet 602C is bonded to the outer side of the electrode plate 603C, and the electrode plate 603D is bonded to the outer side of the component 602C.
  • the coaxially mounted 4 ⁇ ⁇ plates have the same projected area and are matched with a 3 ⁇ NdFeB magnet to form a The magnetic circuit core.
  • the outer surface of the plates 603A and 603D and the two end faces of the annular yoke constitute a magnetic gap symmetric magnetic circuit.
  • the inner circumferential surface of the annular yoke 613 and the vertical circumferential surface of the 4 ⁇ ⁇ plate constitute four coaxial magnetic gaps of equal coaxial diameter, thereby inserting the bobbin 607 and four coaxially mounted a coil, the coil is wound by a layer of 1 or 2 layers of electromagnetic wires.
  • the two center coils 609B and 609C must have a counterclockwise direction and a smooth direction.
  • the tail end YA of the coil 609A is connected in series with the head end XB of the coil 609B
  • the tail end YB of the coil 609B is connected in series with the head end XC of the coil 609C
  • the tail end YC of the coil 609C and the coil 609D are
  • the head end XD is connected in series
  • the tail end YD of the coil 609D is vertically drawn along the line ⁇ frame 607 and the head end A of the line ⁇ 609A constitutes a pair of the speaker.
  • the signal input terminal defines the cross-sectional area of the electromagnetic wire of the four coils 609A and 609D/ 609B and 609C, the number of coil turns, the coil coil, the coil resistance, the absolute value of the inductance of the coil, and the tension at the time of winding, which are equal to each other.
  • the two sets of upper and lower symmetrical coil circuits having a horizontal axis of symmetry on the bisector X X axis of the one-half axial height of the center magnet 602B, the inductance of the four coils and the reciprocating motion
  • the back electromotive force induced in the process cancels each other by having a phase angle of 180 degrees
  • the speaker is a multi-magnetic gap multi-coil inner magnetic type having a resistive load characteristic or a resistance load characteristic and having ultra high sensitivity and high fidelity quality. speaker.
  • Figure 13 shows the wiring diagram of the three-magnetic three-coil speaker coil circuit (1)
  • Figure 14 shows the wiring diagram of the three-magnetic three-coil speaker coil circuit (2)
  • Figure 15 shows the four-magnetic four-wire ⁇ Speaker cable ⁇ circuit principle wiring diagram.
  • the working principle please refer to the corresponding drawings and the description of the patent application file, and the description will not be repeated. Needless to say, according to the contents set forth in this embodiment, it is easy for a person skilled in the art to implement a multi-magnetic gap multi-coil inner magnetic speaker that successfully succeeds four or more magnetic gaps and four or more coils by increasing the number of plates and magnets.
  • the speaker circuit wiring diagram of four or more magnetic gaps and four or more coils the simplest way is to connect all the coils in parallel by two vertically disposed copper foils, as described by the inventors in the CN2437092Y patent. . This is that the equivalent impedance and back EMF will become quite insignificant.
  • Fig. 9 is a view showing the distribution of magnetic flux lines of magnetic flux in the prior art.
  • FIG. 9 is a schematic enlarged view of a node of the embodiment of Figure 6 of the present invention.
  • Element 103A is a ⁇ ⁇ outer plate of the loudspeaker, the horizontal bisector of one-half of the axial height being the Z--Z axis.
  • the permanent magnet magnetic field lines 1991 in the annular magnetic gap 110A exhibit an asymmetrical state on both sides of the Z--Z axis. If the turn ⁇ 109A shown in Fig.
  • the horizontal bisector of the one-half axial height of the turn ⁇ overlaps with the Z--Z axis.
  • Fig. 10 is a view showing the distribution of the magnetic gap magnetic lines of the outer plate of the present invention.
  • H value is closely related to the diameter of the speaker, the geometry of the magnet and the magnetic energy product. It can be seen from Fig. 10 that on both sides of the Z--Z axis, the permanent magnet magnetic field line 1991 is always in a symmetrical state, and the prior art defects shown in Fig. 9 are corrected.
  • Fig. 11 is a view showing the working principle of the back electromotive force canceled by each other in the symmetric magnetic circuit and the symmetric line ⁇ circuit of the present invention.
  • FIG. 11A shows a waveform of a sine wave audio current signal input to a coil on the X-X axis side of the speaker (for example, element 109A of FIG. 6) in the embodiment of the present invention, and a reflection obtained at the zero crossing point.
  • Figure 11B shows the waveform of a sinusoidal audio current signal input to a coil on the other side of the X-axis of the loudspeaker (e.g., element 109B of Figure 6) and its counter electromotive force induced at the zero crossing in the embodiments of the present invention.
  • Sharp pulse waveform is a waveform of a sine wave audio current signal input to a coil on the X-X axis side of the speaker (for example, element 109A of FIG. 6) in the embodiment of the present invention, and a reflection obtained at the zero crossing point.
  • Figure 11B shows the waveform of a sinusoidal audio current signal input to a coil on the other
  • the sinusoidal audio current signal in the two symmetric turns has a phase angle of 180 degrees, which is in accordance with the implementation of the present invention.
  • Fig. 11C shows a counter electromotive force spike waveform induced in a coil (i.e., element 109A of Fig. 6) on one side of the X-axis of the speaker in the embodiment of the present invention.
  • Figure 11D shows the back electromotive force spike waveform induced in the coil of the speaker - the other side of the X-axis (e.g., element 109B of Figure 6) in embodiments of the present invention. Due to the wrap around the two turns on the X--X axis Conversely, therefore, the back electromotive forces induced in the two coils cancel each other to zero or approximately zero due to the 180 degree phase angle.
  • Fig. 20 shows a schematic diagram of the operation principle of the prior art single-magnetic-single-line single-wire speaker audio current and back electromotive force.
  • Component 1 is an audio signal source
  • component 2 is a conventional single-gap single-wire speaker
  • component 2' is the equivalent generator potential of a single-fluid single-coil speaker, that is, a back-EM signal source
  • component 3 is a speaker generator state operation.
  • the equivalent load It can be seen from the lower diagram of Fig.
  • Fig. 21 is a view showing the operation principle of the audio current and the back electromotive force of the multi-magnetic gap multi-coil speaker having the symmetric magnetic circuit and the symmetrical coil circuit of the present invention. It can be seen from the lower diagram of Fig. 21 that when the speaker is turned on the audio signal source 21, an instantaneous audio current I flows through the two reversely wound speaker symmetrical coils 23A and 23B, and the two symmetrical coils generate two correspondences. The electric power FA and FB have the same direction and form a resultant force F. It can be seen from the upper diagram of Fig.
  • Fig. 18 is a view showing the mounting of the magnetic speaker core and the bracket in the three-magnetic gap three-coil of the present invention.
  • Fig. 19 is a view showing the mounting of the four-gap four-wire internal magnetic speaker core and the bracket of the present invention.
  • the present invention proposes an internal magnetic speaker technical solution having three magnetic gap three coils, four magnetic gap four coils and even more magnetic gaps and more coils.
  • the magnets mounted on both sides of a circular plate have the same polarity, thereby forming at least one pair or more of the repulsive magnets and the magnetic core.
  • the axial thrust between the repulsive magnets becomes very large, which not only increases the difficulty of the bonding process of the magnetic core, but also ensures reliable operation of the speaker. Bring new instability. 18 and FIG.
  • a central shaft hole having an equal projection area is provided at an axial portion of the electrode plate and the magnet, and the speaker is made of a non-magnetic material.
  • the axial center of the bracket 381 or 681 is also provided with a central shaft hole having a projected area equal to or matching a screw hole, and a non-magnetic material such as a fastener 3710 or 6710 made of lCrl8Ni_9Ti stainless steel is worn. Passing the shaft hole and applying a sufficient static pressure to the plate and the magnet by a pressure plate 372 or 672 made of a non-magnetic material matched to the plate and bonding them to the speaker The bracket is on the convex platform surface 31180 or 61180.
  • Figures 18 and 19 show a static pressure applied to the core by means of a set torque of a screw 3711 or 6711 and a nut 375 or 675.
  • a set torque of a screw 3711 or 6711 and a nut 375 or 675 Based on known techniques: as long as the illustrated fastener 3710 or 6710 is rotated 180 degrees and the central shaft hole of the bracket 381 or 681 is changed to a screw hole matching the screw, by adjusting the torque of the nut 371 or 671 Applying static pressure to the pressure plate 372 or 672, the magnetic core can also be described
  • Fasteners 3710 or 6710 are adhesively attached to the inner land surface 31180 or 61180 of the bracket 381 or 681.
  • the tail of the rivet can be riveted onto the pallet 372 or 672 by appropriate pressurization.
  • the magnetic core can also be adhesively fixed to the inner convex platform surface 31180 or 61180 of the speaker bracket 381 or 681.
  • Figure 16 shows an embodiment of a 2.0 channel multimedia audio system of the present invention.
  • 16-A shows the front view of the left speaker of a 2. 0 channel USB sound system.
  • the speaker is provided with a 3-inch double-magnetic gap double-wire ⁇ speaker 1.
  • the speaker has the symmetrical magnetic circuit and the symmetrical coil circuit and has only one conical diaphragm 8, and the diameter of the middle hole of the cone top does not exceed ⁇ 26 mm.
  • the speaker 2 is a pair of wooden bookshelf type closed boxes.
  • An aluminum alloy bracket 3 is fixed to the speaker cabinet by fasteners.
  • the bottom of the speaker 2 and the top of the bracket 3 are provided with sealed holes for the audio connection wires of the speaker.
  • the neck of the bracket 3 has a USB Mini socket 4, a ⁇ 3.
  • FIG. 16-C shows a rear view of the right speaker of a 2. 0 channel USB sound system. Its speaker cabinet is identical to the right speaker. Also has an aluminum alloy bracket 3, a ⁇ 3. 5 mm audio current input socket 6 is mounted on the back of the bracket neck, and the above left and right speakers are connected as a pair of USB audio with 2.0 channels through an audio connecting cable. Digital interface multimedia sound system.
  • the left and right speakers are equal volume closed boxes.
  • the 3-inch caliber speaker 1 is a full-band speaker with coaxial vocalization. Even with a 16-bit conversion precision DAC, the speaker output sounds very loud, the sound image is positioned accurately, the sound quality is delicate and realistic, the sound is sweet and full, and the details are vividly displayed. The resolution is obviously higher than that of the traditional high-end multimedia box, and the frequency response range is 80Hz ⁇ 20KHz.
  • Fig. 17 shows an embodiment of the 2-channel multimedia sound system of the present invention.
  • Figure 17-A shows a front view of the left and right channel speakers.
  • Each speaker is equipped with a 4-inch dual-magnetic double-line ⁇ speaker 1.
  • the speaker has a symmetrical magnetic circuit and a symmetrical coil circuit and has only one conical diaphragm 4, and the diameter of the mesopores of the cone top does not exceed ⁇ 26 ⁇ Meter.
  • the speaker is a pair of wooden bookshelf equal volume open boxes.
  • Figure 17-B shows a rear view of the left and right channel speakers.
  • a ⁇ 3. 5 mm audio current input socket 7, an inverted tube air outlet 8 and a shock pad 10 are provided on the wiring harness 11.
  • Figure 17-C shows a front view of the subwoofer.
  • the panel 30 is provided with a USB input interface 39, an LED signal light 36, a mute button 35, volume adjustment buttons 34 and 33, an inverted tube air outlet 38 and two ⁇ 3. 5 mil audio current output sockets 37.
  • a PCB board 310 is disposed inside the subwoofer, and is provided with a set of DACs, a set of 2.0 channel D audio power amplifiers, a set of electronic frequency dividers with a frequency bandwidth of 40 Hz to 150 Hz, and a set of subwoofers. Class D audio power amplifiers and matching filter storage electrolytic capacitors up to 100,000, necessary control circuits, overload thermal protection circuits, short circuit protection circuits and SMD surface mount electronic components.
  • Figure 17-D shows a side view of the subwoofer.
  • the panel 32 is provided with a 6.5-inch subwoofer 31, which is a three-magnetic three-coil/or four-magnetic four-coil, with a frequency bandwidth of 40 Hz to 150 Hz, and has the symmetric magnetic circuit and symmetry.
  • the diameter of the middle hole of the cone top does not exceed ⁇ 33 ⁇ .
  • Remote real-time monitoring of the computer can be implemented through the local area network and the Internet.
  • the present invention achieves unexpected technical effects.
  • the combination of the inventors' prior art patented invention and its improved technical solution converts the 2.0 and 2. channel active multimedia sound systems of the conventional computer into passive digital multimedia sound systems. According to conservative estimates, each computer can save 20W of electricity, which can make outstanding contributions to the environmental protection and energy conservation of the world's 100 million units.

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

Description

具有^ 数字接口的多媒体音响系统
技术领域
本发明涉及具有音频数字接口的多媒体音响系统，特别涉及具有 USB外置声卡或 IEEE1394外置声卡并由 电脑或光碟游戏机供电的数字多媒体音响系统， 属于电学的电声领域。 背景技术
具有音频数字接口的多媒体音响系统，包括具有 USB外置声卡或 IEEE1394外置声卡的多媒体音响系统是 一种已有技术。
例如， 微软公司在上世纪末就推出了由外置电源供电的 DSS 80型 USB音响系统。
PHILIPS公司于 2006年推出的 DGX320型音响系统， 每个音箱内设有一个 1英寸高音扬声器， 一个 2英 寸全频带扬声器和一个无源低音辐射器， 由 PC的 USB接口提供电源， 其输出功率为 2 X 1W, 频率响应范围为 100Hz~20KHz。
2006年 3月， 日本 EVERGREEN公司推出的 DN-MPS100型音响系统， 包含二个 3英寸口径的扬声器， 一个安 装在面板上的 USB接口和一个安装在音箱背后的 MP3 decoding解码器及箱内的收音机电路。 其音频输入功率 为 2 X 7W, 釆用随附的 AC适配器由电力网独立供电。
2007年 1月， YAMAHA公司于 CES展会上推出一款 NX-U10型 USB音响系统， 釆用二个 1. 5英寸口径的迷 你 (Mini)扬声器， 通过 "充电电容放大器"技术和 SR- Bass低音增强技术， 将笔记本 PC USB接口提供的能量 储存在一组电容器的极板上借以满足低音频强劲输出时对功率容量的爆发性需求。 其频率响应范围为 90Hz~20KHz。
但是， 大量基于 USB音频数字解码器 (DAC)和 2~4个迷你扬声器以及一组数字或模拟功率放大器构成的 USB迷你音响系统曾经充斥于国内外市场。 就总体而言， 这类产品的音质差、 音量小， 无法满足消费者的使 用要求。
众所周知， PC USB接口的输出电压是 DC5V±5%， 输出电流是 500mA。 也就是说， 每个 USB接口可以提供 的额定连续功率只有 2. 5W。 而一个 2 英寸口径扬声器的额定连续输入功率为 2~4W， 其 SPL 值可高达 83dB/lW/lm。 一个 1. 25 ~ 1. 5英寸口径扬声器的额定连续输入功率大致为 1 ~ 3W， 其 SPL值通常为 79 ~ 82dB/lW/lm。 一个 3英寸口径扬声器的额定连续输入功率大致为 5 ~ 8W， 其 SPL值很难超过 85dB/lW/ln！。 3 英寸口径扬声器虽然具有较低的谐振频率 F„, 其低音频段的电声还原品质比 2英寸以下的迷你扬声器要好得 多。 但是， 音响制造商宁愿选择音质相对差一些的 2英寸或更小口径的扬声器作为 USB音响的发声单元。 其 原因是： 电脑 USB音响系统功率放大器输出的 2 X 1W左右电功率很难推动一对 3英寸口径扬声器正常工作并 获得足够的音量和好的音质。 一般而言， 2英寸口径扬声器的电声转换效率只有 0. 125 %。 也就是说： 当这个扬声器输入 1W电功率时， 只 有 0. 00125 W的电能被转换成有用的声能， 其余 0. 99W电能都被转换成人们不需要的和有害的热能而白白浪 费掉。 与我们常见的白炽灯的能量转换效率 7 %相比较， 2英寸扬声器的效率大约只有白炽灯效率的 1/56。
所以，现有的主流扬声器即动圈式扬声器（以下简称为扬声器)， 是 20~21世纪全球范围内能量转换效率 最低而用途最广泛的人类社会基础电气产品：
其一， 在全世界， 除 US5849760专利外， 几乎所有商品化生产的扬声器都只有一个磁隙和一个线圏。 当 这个线圏接通音频电流时， 线圏在磁隙磁场的交互作用下根据弗莱明左手定则产生一个电动力 F, 推动扬声 器振膜作往复式活塞运动， 扬声器因振动空气而发声。 但是， 当这个线圏作往复式活塞运动时， 磁隙内的永 磁磁力线又垂直切割这个线圈， 在线圈内感应得到一个弗莱明右手定则规定的发电机电势， 这就是通常所说 的反电动势。这个反电动势与扬声器线圈内的音频信号叠加后造成扬声器的失真。 一般说来， 扬声器线圈的 振幅愈大、 加速度愈大、 音频信号电流的频率愈低， 反电动势的幅值也愈大， 所引起的失真也愈大。 所以， 已有技术受到反电动势失真的制约而无法提高扬声器的效率。 其二， 已有技术可以实施成功一个全音域的中 小口径扬声器。 但是， 已有技术无法使这种全音域扬声器具备广大消费者普遍接受的性能价格比并实现批量 化工业生产。 其根本原因在于： 扬声器的阻抗是扬声器工作电流频率的一个函数： 频率愈低阻抗愈低， 频率 愈高阻抗愈高。 对于每一个传统的单磁隙单线圈扬声器， 其线圈中流过的高音频电流有效值比低音频电流要 小得多。 所以， 这个扬声器在高音频段产生的声压比低音频段有明显的减少。 对于小于 3英寸口径的扬声器 而言， 由于扬声器振动系统的质量较小， 人们可以借助技术手段予以弥补。 但此类小口径扬声器的谐振频率 F。必然偏高， 很难获得令人满意的低音频电声还原效果。 对于 3英寸以上口径的扬声器而言， 随着单元直径 的加大， F。将向低音频段下潜从而改善扬声器的低音频还原品质。 但是， 此类扬声器的振动系统质量有所增 加， 扬声器在高音频段的 SPL值将在 5~10 KHz及以上频段产生大的陡降。 所以， 现有的多媒体音响系统， 常 常设置一个高音扬声器和一个中低音扬声器来满足消费者对 FcT20KHz频段的全音域需求。当然，为了均衡这 二个扬声器的工作还必须增加一个分频器。而分频器的引入又进一步增加了音响系统的能耗和失真度。其三， US5849760专利无法在中小口径扬声器例如应用面最广的 1/2 ~ 8英寸口径内磁式扬声器范围内得到应用。
其四， 尽管如此， PC的 USB音响还是具有一些公认的优点。 例如： 1)采用 USB外置声卡， 可以彻底摆脱 电脑机箱内变压器和电风扇所产生的电磁波干扰； 2)基于 PCM/PWM音频数字技术的解码编码器和 D类音频功 率放大器或基于 DPPTM专利技术的 IBit Δ—∑数模转换技术的 T类音频功率放大器，与模拟音频系统十分 复杂的滤波器、 R/C隔直流网络和 AB类功率放大器相比较， 在抗干扰、 放大器效率、 信噪比、 动态范围等方 面都比模拟音频系统有更好的表现； 3)到目前为止，电脑的 PCI主流声卡只有 16 Bit的数模及模数转换精度， 而不少 "USB迷你音箱" 内的 USB单工声卡， 其 DAC却往往具有 20 Bit的转换精度； 4) USB通用串行总线虽 然比 PCI并行总线的等级低， 但随着 CPU性能的不断提高， 尤其是双核和 4核 CPU的湧现以及 CPU功能的不 断强化 .:.„USB2. 0接口标准的充分普及和 USB3. 0标准的即将颁行， 基于 USB/或 IEEE1394 (含 1394. b等衍生产 品)接口技术的数字多媒体音响系统将成为今后必然的发展趋向。
有鉴于此，本发明人从 1997年开始提出了一系列发明专利方案企图改变上述极端不合理的现状。它们主 要包括： A) W0 01/15493专利族的授权专利 CN00122197. 3、 US6795564, CN200520035371. X、 CN200620033128. 9 和已经公开的专利申请 JP特表 2003-531508、 US20050099255、 CN200510091936. 0、 CN200610020317. 7； B) W0 99/31931专利族的授权专利 CN99114781. 2、 TW88109796、 CN00222469. 0 ； C)
尚未公开的 CN200710181973. X 、 CN200710123821. 4 、 CN200720126871. 3 、 CN200810065384. X 和 CN200820092177. 9专利申请。
为拨冗起见， 详细的内容请参阅上述已经公开的专利文献而不再重复。 发明内容
本发明的第一个目的是克服技术偏见和已有技术的不足之处， 提供一种由 USB/或 IEEE1394接口供电、 使用具有电阻负载特性或近似于电阻负载特性的单振膜全频带多磁隙多线圈扬声器构成一种具有高效节能、 高效节材和高保真品质的 2. 0声道数字多媒体音响系统。
本发明的第二个目的是克服技术偏见和已有技术的不足之处， 提供一种由 USB/或 IEEE1394接口供电、 使用具有电阻负载特性或近似于电阻负载特性的单振膜全频带多磁隙多线圈扬声器构成一种具有高效节能、 高效节材和高保真品质的 2. 1声道数字多媒体音响系统。
本发明的第三个目的是克服技术偏见和已有技术的不足之处， 提供一种由独立的交直流电源供电、 由 USB/或 IEEE1394接口提供音频数字信号、使用具有电阻负载特性或近似于电阻负载特性的单振膜全频带多磁 隙多线圈扬声器构成一种具有高效节能、 高效节材和高保真品质的 4. Γ7. 1声道数字多媒体音响系统。
本发明的第四个目的是克服已有技术的不足之处， 对已有的多磁隙多线圈扬声器的技术特征作出进一步 的改进和限定。 消除扬声器的发电机效应和反电动势， 提供一系列具有超高效率和高保真品质的全频带扬声 器， 尤其是提供一种具有电阻负载特性或近似于电阻负载特性的超高效率和低失真度的重低音扬声器。
本发明的目的是这样实现的：
具有音频数字接口的多媒体音响系统， 包括电脑 /或光碟游戏机 PS2的至少一个 USB接口 /或 IEEE1394 接口 /或同轴电缆接口 /或光纤接口， 一组与 USB/或 IEEE1394接口连接的 2. 0声道外置声卡及与之匹配的 D 类 /或 T类音频功率放大器 IC芯片，一组与所述 2. 0声道外置声卡及所述音频功率放大器匹配的控制保护电 路 /或微处理器 IC芯片， 一对左右声道音箱，
所述 2. 0声道外置声卡、所述 IC芯片及与之关联的 SMD表面贴装元件 /或集成在一起的 CMOS电路、指示 所述外置声卡工作状态的 LED信号灯、所述音频功率放大器的音量调节装置均安装在 /或通过电线和插接件连 接到 PCB板上，所述 PCB板固定安装在所述左声道音箱内 /或音箱支架内，所述 LED信号灯及所述音量调节装 置固定在所述左声道音箱面板 /或音箱支架上， 所述 PCB板 /或所述左声道音箱面板上还设有一个与所述接口 匹配的插座 /或通过一根接口延长线的插头与电脑 /或光碟游戏机 PS2的所述接口相连接，所述右声道音箱的 面板上也设有一个音频插座， 一根音频电缆将所述左右声道音箱连接成为一个 2. 0声道音响系统；
所述 2. 0声道外置声卡至少具有一组单工的 16~48 Bit的立体声数模解码器 DAC, 所述 DAC及所述 IC 芯片由电脑 USB接口的 5V电源供电并在最靠近所述 DAC及所述 IC芯片电源输入脚处各自并联一组兼有滤波 和储能功效的电解电容器， 规定所述音频功率放大器的额定工作电压下限值比所述 DAC的额定工作电压下 限值要低 1. Γ2. 7V, 以便所述扬声器输出一个足够宽度的大动态低音频信号时所述音频功率放大器及所述 DAC的瞬间工作电压基本上不超越额定工作电压的下限值；
所述左右声道音箱内分别设有至少一个具有电阻负载特性或近似于电阻负载特性的多磁隙多线圏扬声 器， 规定所述多磁隙多线圈扬声器仅仅配置一个 Φ 7英寸口径的圆锥形振膜 /或内凹形振膜， 规定所述圆锥 形振膜的中孔直径不超过 Φ 26^ Φ 33亳米， 由此构成二个同轴共点发声、 所述多磁隙多线圈扬声器的电感量 及其在往复运动过程中感应得到的反电动势因具有 180度相位角而互相抵消的全频带扬声器；
规定所述音频功率放大器的额定工作电压 DC 5. 25V/或 DC 8~15V 、 所述音频功率放大器每声道的额 定连续输出功率 ¾Ξ 1W/或 ¾Ξ 2W, 由此构成一种通过 USB接口 /或 IEEE1394接口供电的具有超高灵敏度和高保 真品质的 2. 0声道数字多媒体音响系统。
具有音频数字接口的多媒体音响系统， 包括电脑 /或光碟游戏机 PS2的至少一个 USB接口 /或 IEEE1394 接口 /或同轴电缆接口 /或光纤接口， 一组与 USB/或 IEEE1394接口连接的 2. 1声道外置声卡及与之匹配的 D 类 /或 Τ类 2. 1声道音频功率放大器 IC芯片，一组与所述 2. 1声道外置声卡及所述音频功率放大器匹配的控 制保护电路 /或微处理器 IC芯片， 一对左右声道音箱及一个重低音音箱，
所述 2. 1声道外置声卡、所述 IC芯片及与之关联的 SMD表面贴装元件 /或集成在一起的 CMOS电路、指示 所述外置声卡工作状态的 LED信号灯、 所述 2. 1声道音频功率放大器的音量调节装置均安装在 PCB板上， 所 述 PCB板、 所述 LED信号灯、 所述音量调节装置安装在所述重低音音箱内 /或其面板上， 所述 PCB板 /或所述 重低音音箱的面板上还设有一个与所述接口匹配的插座 /或通过一根接口延长线的插头与电脑 /或光碟游戏机 PS2 的所述接口相连接， 所述左右声道音箱面板上也设有一个音频插座， 二根音频电缆将所述左右声道音箱 与重低音音箱连接成为一个 2. 1声道音响系统；
所述 2. 1声道外置声卡至少具有一组单工的 16 ~ 48 Bit 2. 1声道数模解码器 DAC, 其中左右声道信号 经由所述 DAC连接至所述左右声道音频功率放大器 IC芯片， 另外一路重低音声道模拟信号经由通频带宽为 20Hz至最高为 250Hz的电子分频器连接至所述重低音音频功率放大器；
当所述电脑为 PC时， 所述 DAC和所述左右声道音频功率放大器由 PC的一个 USB接口提供 5V 电源， 所 述重低音音频功率放大器则由 PC的另外一个 USB接口提供 5V 电源； 当所述电脑为苹果机时， 所述 DAC、 所述左右声道音频功率放大器、 所述电子分频器、 所述重低音功率放大器均由同一个 IEEE1394接口提供 DC 8^15V 电源； 所述 DAC及所述左右声道音频功率放大器 IC芯片由电脑 USB接口的 5V电源供电并在最靠近所述 DAC及 IC芯片电源输入脚处各自并联一组兼有滤波和储能功效的电解电容器，规定所述音频功率放大器的额定工作 电压下限值比所述 DAC的额定工作电压下限值要低 1.广 2. 7V, 以便所述扬声器输出一个足够宽度的大动态低 音频信号时所述音频功率放大器及所述 DAC的瞬间工作电压基本上不超越工作电压的下限值，
所述重低音音频功率放大器 IC 芯片在最靠近电源输入脚处单独并联一组兼有滤波和储能功效的容量 1, 000 ~ 100，000 μ Ρ的电解电容;
所述左右声道音箱内分别设有至少一个具有电阻负载特性或近似于电阻负载特性的多磁隙多线圏扬声 器， 规定所述多磁隙多线圈扬声器仅仅配置一个 Φ 7英寸口径的圆锥形振膜 /或内凹形振膜， 规定所述圆锥 形振膜的中孔直径不超过 Φ 26~ Φ 33毫米， 由此构成二个同轴共点发声、 所述多磁隙多线圈扬声器的电感量 及其在往复运动过程中感应得到的反电动势因具有 180度相位角而互相抵消的全频带扬声器，
所述重低音音箱内设有一个具有电阻负载特性或近似于电阻负载特性的多磁隙多线圈扬声器， 规定所述 多磁隙多线圈扬声器仅仅配置一个 Φ 7英寸口径的圆锥形振膜 /或内凹形振膜，规定所述圆锥形振膜的中孔 直径不超过 Φ26~ Φ 33毫米， 由此构成一个同轴共点发声、 所述多磁隙多线圏扬声器的电感量及其在往复运 动过程中感应得到的反电动势因具有 180度相位角而互相抵消的带通式重低音扬声器；
规定所述音频功率放大器的额定工作电压 DC 5. 25V/或 ¾≡DC 8~15V 、 所述左右声道音频功率放大器每 声道的额定连续输出功率≤≡ 1W/或≤Ξ 2W, 所述重低音音频功率放大器的额定连续输出功率≤Ξ 2W/或≤Ξ 4W, 由此构成一种通过 USB接口 /或 IEEE1394接口供电的具有超高灵敏度和高保真品质的 2. 1声道数字多媒体音 响系统。
具有音频数字接口的多媒体音响系统， 包括电脑 /或光碟游戏机 PS2的至少一个 USB接口 /或 IEEE1394 接口 /或同轴电缆接口 /或光纤接口， 一组与 USB/或 IEEE1394接口连接的 4. 1 ~ 7. 1声道外置声卡及与之匹 配的 D类 /或 T类音频功率放大器 IC芯片，一组与所述 4.广 7. 1声道外置声卡及所述音频功率放大器匹配的 控制保护电路 /或微处理器 IC芯片， 4 ~ 7个卫星音箱及一个重低音音箱，
所述 4. Γ 7. 1声道外置声卡、 所述 IC芯片及与之关联的 SMD表面贴装件 成在一起的 CMOS电路、 指示所述外置声卡工作状态的 LED信号灯、 所述 4. Γ 7. 1声道音频功率放大器的音量调节装置均安装在 PCB 板上， 所述 PCB板、 所述 LED信号灯、 所述音量调节装置均安装在所述重低音音箱内 /或其面板上， 所述 PCB 板 /或所述重低音音箱面 fei还设有一个与所述接口匹配的插座 /或通过一根接口延长线的插头与电脑 /或光 碟游戏机 PS2的所述接口相连接， 所述 4 ~ 7个卫星音箱的面板上还分别设有一个音频插座， 4 ~ 7根音频 电缆将所述 4 ~ 7个卫星音箱与重低音音箱连接成为一个 4.广 7. 1声道音响系统；
所述 4. Γ7. 1声道外置声卡至少具有一组单工的 16 8 Bit 4. Γ7. 1声道数模解码器 DAC, 其中 4 声 道信号经由所述 DAC连接至与之匹配的所述 4~7声道音频功率放大器 IC 芯片， 另外一路重低音声道模拟信 号经由通频带宽为 20 Hz至最高为 250Hz的电子分频器连接至所述重低音音频功率放大器； 所述 4. Γ7. 1声道外置声卡由所述 USB接口 /或 IEEE1394接口供电， 所述 4~7声道音频功率放大器、 所 述重低音音频功率放大器、所述控制保护电路 /或微处理器 IC芯片由设置在所述重低音音箱内的一个交 /直流 电源独立供电，所述 DAC及所述 4 声道音频功率放大器 IC芯片最靠近所述 DAC及 IC芯片电源输入脚处各 自并联一组兼有滤波和储能功效的电解电容器， 以便所述扬声器输出一个足够宽度的大动态低音频信号时所 述音频功率放大器及所述 DAC的瞬间工作电压基本上不超越额定工作电压的下限值，
所述重低音音频功率放大器 IC 芯片最靠近电源输入脚处单独并联一组兼有滤波和储能功效的容量 5=1, 000 ~ 100, 000 y F的电解电容储能放电电路；
所述 4~7个卫星音箱内分别设有至少一个具有电阻负载特性或近似于电阻负载特性的多磁隙多线圈扬声 器， 规定所述多磁隙多线圈扬声器仅仅配置一个 Φ 7英寸口径的圆锥形振膜 /或内凹形振膜， 规定所述圆锥 形振膜的中孔直径不超过 Φ 26~ Φ 33亳米， 由此构成 Γ7个同轴共点发声、所述多磁隙多线圈扬声器的电感 量及其在往复运动过程中感应得到的反电动势因具有 180度相位角而互相抵消的全频带扬声器；
所述重低音音箱内设有一个具有电阻负载特性或近似于电阻负载特性的多磁隙多线圈扬声器， 规定所述 多磁隙多线圏扬声器仅仅配置一个 ¾Ξ Φ 10英寸口径的圆锥形振膜 /或内凹形振膜， 规定所述圆锥形振膜的中 孔直径不超过 Φ 26 Φ 33毫米， 由此构成一个同轴共点发声、 所述多磁隙多线圈扬声器的电感量及其在往复 运动过程中感应得到的反电动势因具有 180度相位角而互相抵消的带通式重低音扬声器；
规定所述 4~7声道音频功率放大器的每声道额定连续输出功率≤Ξ 1W，所述重低音音频功率放大器的额定 连续输出功率 4W ~ 8W， 由此构成一种通过独立交 /直流电源供电的具有超高灵敏度和高保真品质的 4.广 7. 1 声道数字多媒体音响系统。
具有音频数字接口的多媒体音响系统， 安装在所述重低音音箱内除带通式重低音扬声器以外的所有元件 及装置， 均可以从重低音音箱内分离出来构成一个独立的功率放大器； 所述独立功率放大器的面板上设有必 要的指示调节设备、 音频输入接口和音频输出插座， 所述 4 个卫星音箱及所述重低音音箱的面板上分别设 有一个音频插座， 5~8 根音频电缆将所述独立功率放大器与所述 (4+1) ~ (7+1)个音箱连接成为一个 4. 1 (+1) Ύ 1 (+1)声道的数字多媒体音响系统。
具有音频数字接口的多媒体音响系统， 所述多磁隙多线圈扬声器是一个双磁隙双线圈扬声器， 所述扬声 器具有二块同轴安装并对称设置的上极板和下极板，所述上极板和下极板是二块具有中央轴孔的圆环形平板， 一块厚度方向充磁极化的圆环状磁铁 /或钕铁硼磁铁被夹持在所述上极板和下极板之间并互相匹配，一个与所 述上极板和下极板同轴安装的环筒状磁轭在轴向高度上分别超出所述上极板和下极板的外侧极面 0. 5~ 8亳米 并形成二组上下对称的磁隙磁路， 所述环筒状磁轭的外周面与所述上极板和下极板中央轴孔的垂直周面间构 成二个同轴等径的环形磁隙，在所述环形磁隙内插入同轴等径的二个线圈，所述线圈由 1层 /或 2层电磁线绕 制而成， 二个所述线圈间设有相应的间隔， 规定二个所述线圈的绕向及流经线圈的电流方向， 使二个所述线 圈在同一工作瞬间产生同一方向的电动力 F; 以所述上极板和下极板中央轴孔的中心轴线为垂直对称轴，以所述磁铁 /或钕铁硼磁铁二分之一轴向高度 的等分线 X ― X轴线为水平对称轴， 所述扬声器具有在几何形状和磁性能方面左右、 上下对称的二组对称 磁路，
规定二个所述线圈的电磁线横截面积、 线圈圈数、 线圈卷幅、 线圈电阻、 线圈电感量的绝对值、 绕线时 的张力彼此相等， 以所述磁铁 /或钕铁硼磁铁二分之一轴向高度的等分线 X― X轴线为水平对称轴， 所述扬 声器具有二组上下对称的线圈电路， 由此构成一种具有电阻负载特性或近似于电阻负载特性的双磁隙双线圈 外磁式全频带扬声器或带通式重低音扬声器。
具有音频数字接口的多媒体音响系统， 所述多磁隙多线圈扬声器是一个双磁隙双线圈扬声器， 所述扬声 器具有二块同轴安装并对称设置的上极板和下极板， 所述上极板和下极板是二块圆形平板， 一块厚度方向充 磁极化的圆片状磁铁 /或钕铁硼磁铁被夹持在所述上极板和下极板之间并互相匹配，一个与所述上极板和下极 板同轴安装的环筒状磁轭在轴向高度上分别超出所述上极板和下极板的外侧极面 0. 5~8亳米并形成二组上下 对称的磁隙磁路， 所述环筒状磁轭的内周面与所述上极板和下极板的垂直周面间构成二个同轴等径的环形磁 隙， 在所述环形磁隙内插入同轴等径的二个线圏，所述线圏由 1层 /或 2层电磁线绕制而成， 二个所述线圏间 设有相应的间隔， 规定二个所述线圈的绕向及流经线圈的电流方向， 使二个所述线圈在同一工作瞬间产生同 一方向的电动力 F;
以所述上极板和下极板的中心轴线为垂直对称轴，以所述磁铁 /或钕铁硼磁铁二分之一轴向高度的等分线 X ― X轴线为水平对称轴， 所述扬声器具有在几何形状和磁性能方面左右、 上下对称的二组对称磁路， 规定二组所述线圏的电磁线横截面积、 线圏圏数、 线圈卷幅、 线圏电阻、 线圏电感量的绝对值、 绕线时 的张力彼此相等， 以所述磁铁 /或钕铁硼磁铁二分之一轴向高度的等分线 X ― X轴线为水平对称轴， 所述 扬声器具有二组上下对称的线圈电路， 由此构成一种具有电阻负载特性或近似于电阻负载特性的双磁隙双线 圏内磁式全频带扬声器或带通式重低音扬声器。
具有音频数字接口的多媒体音响系统， 所述多磁隙多线圈扬声器是一个三磁隙三线圈扬声器， 一±夬磁性 材料制作的圆形极板的两侧平面上分别安装一 ±夬在厚度方向充磁极化的圆片状磁铁 /或钕铁硼磁铁，所述磁铁 在紧靠所述极板的一侧具有相同的极性， 所述磁铁的外侧平面上又分别安装一±夬磁性材料制作的圆形极板， 由此构成一对相斥型磁铁， 所述同轴安装的三块圆形极板具有相同的投影面积且与同轴安装的二块所述磁铁 的投影平面匹配， 一个与所述圆形极板中心轴线同轴安装的环筒状磁轭在轴向高度上分别超出所述外侧圆形 极板的外侧极面 0. 5~8亳米并形成二组上下全对称的磁隙磁路， 所述环筒状磁轭的内周面与所述圆形极板的 垂直周面间构成三个同轴等径的环形磁隙， 在所述环形磁隙内插入电磁线横截面积相等的同轴等径的三个线 圈， 所述线圈由 1层 /或 2层电磁线绕制而成， 三个所述线圏间设有相应的间隔， 规定所述线圈的绕向及流经 线圈的电流方向， 使三个所述线圈在同一工作瞬间产生同一方向的电动力 F，
以所述圆形极板的中心轴线为垂直对称轴， 以所述中央极板的二分之一轴向高度的等分线 — X轴线为 7 平对称轴， 所述扬声器具有在几何形状和磁性能方面左右、 上下对称的二组对称磁路， 设定所述线圏电阻、 线圏卷幅、 线圏感量的绝对值、 绕线时的张力彼此相等， 以所述居中极板的二分之 一轴向高度的等分线 — X轴线为水平对称轴， 所述扬声器具有二组上下对称的线圈电路， 由此构成一种具 有电阻负载特性或近似于电阻负载特性的三磁隙三线圈内磁式全频带扬声器或带通式重低音扬声器。
具有音频数字接口的多媒体音响系统， 所述三磁隙三线圈内磁式扬声器的三块所述极板和二块所述磁铁 的轴心部位均设有投影面积相等的中央轴孔， 所述扬声器的使用非导磁材料制成的所述托架的轴心部位也设 有一个投影面积与之相等的中央轴孔 /或匹配的螺孔，，一根非导磁材料制成的紧固件穿过所述轴孔 /或匹配的 螺孔并利用一块与所述极板匹配的非导磁材料制成的压板对所述极板和所述磁铁施加足够的静压力并使它们 粘结固定在所述扬声器的所述托架上。
具有音频数字接口的多媒体音响系统，所述多磁隙多线圈扬声器是一个四磁隙四线圈扬声器 /或四个以上 磁隙四个以上线圏的扬声器， 所述扬声器具有一 ±夬磁性材料制作的圆形极板， 在所述圆形极板的两侧平面上 分别安装一 ±夬在厚度方向充磁极化的圆片状磁铁 /或钕铁硼磁铁，所述磁铁在紧靠所述圆形极板的一侧具有相 同的极性，所述磁铁的外侧平面上又分别安装 ±夬磁性材料制作的圆形极板……， 由此构成三对 /或三对以上 相斥型磁铁， 所述同轴安装的四块 /或四块以上圆形极板具有相同的投影面积且与同轴安装的三块 /三块以上 所述磁铁的投影平面匹配， 一个与所述圆形极板中心轴线同轴安装的环筒状磁轭在轴向高度上分别超出所述 外侧圆形极板的外侧极面 0. 5~8亳米并形成二组上下全对称的磁隙磁路，一个与所述相斥型磁铁同轴安装的 环筒状磁轭的内周面与所述圆形极板的垂直周面间构成四个 /或四个以上同轴等径的环形磁隙，在所述环形磁 隙内插入电磁线横截面积相等的同轴等径的四个 /或四个以上线圏，所述线圏间设有相应的间隔，规定所述线 圈的绕向及流经线圈的电流方向， 使所述线圏在同一工作瞬间产生同一方向的电动力 F,
以所述圆形极板的中心轴线为垂直对称轴， 以所述居中磁铁二分之一轴向高度的等分线 X ― X轴线为 水
平对称轴， 所述扬声器具有在几何形状和磁性能方面左右、 上下对称的三组 /或三组以上对称磁路，
当所述线圏 609Α及 609C从振膜外侧方向视入时具有顺时针绕向，所述线圏 609Β及 609D必须具有反时 针绕向，反之亦然， 所述线圏 609Α 的尾端 ΥΑ与所述线圈 609Β的首端 Β串接，所述线圏 609Β的尾端 ΥΒ 与 所述线圈 609C的首端 XC串接， 所述线圈 609C的尾端 YC与所述线圈 609D的首端 XD串接， 所述线圈 609D 的尾端 YD沿所述线圏骨架垂直弓 I上与所述线圏 609A的首端 M构成所述换能器的一对信号输入端子，规定所 述线圈 609A与 609D及所述线圈 609B与 609C的电磁线横截面积、 线圈圈数、 线圈卷幅、 线圈电阻、 线圈电 感量的绝对值相等即 I 609A I + I 609B I = I 609D I + I 609C I 以及绕线时的张力彼此相等，以所述 居中磁铁的二分之一轴向高度的等分线 X― X轴线为水平对称轴， 所述扬声器具有二组上下对称的线圏电 路，由此构成一种具有电阻负载特性或近似于电阻负载特性的四磁隙四线圈 /或更多磁隙和线圈的内磁式全频 带扬声器或带通式重低音扬声器。 具有音频数字接口的多媒体音响系统， 所述四磁隙四线圈 /或更多磁隙和线圈的内磁式扬声器的四块 /或 四块以上所述极板和三块 /或三块以上所述磁铁的轴心部位均设有投影面积相等的中央轴孔，所述扬声器的使 用非导磁材料制成的所述托架的轴心部位也设有一个投影面积与之相等的中央轴孔 /或匹配的螺孔，一根非导 磁材料制成的紧固件穿过所述轴孔 /或匹配的螺孔并利用一块与所述极板匹配的非导磁材料制成的压板对所 述极板和所述磁铁施加足够的静压力并使它们粘结固定在所述扬声器的所述托架上。 附图说明
图 1. 具有音频数字接口的 2. 0声道多媒体音响系统框图。
图 2. 具有音频数字接口的 2. 1声道多媒体音响系统框图。
图 3. 模数转换器及数字音频功率放大器集成一体的框图。
图 4. 具有音频数字接口的 5. 1声道多媒体音响系统框图。
图 5. 双磁隙双线圈外磁式扬声器实施例的纵剖面图。
图 6. 双磁隙双线圏内磁式扬声器实施例的纵剖面图。
图 7. 三磁隙三线圈内磁式扬声器实施例的纵剖面图。
图 8. 四磁隙四线圈内磁式扬声器实施例的纵剖面图。
图 9. 已有技术外侧极板的磁隙磁力线分布示意图。
图 10. 本发明外侧极板的磁隙磁力线分布示意图。
图 11. 对称磁路及对称线圏电路中反电动势相互抵消的工作原理示意图。
图 12. 双磁隙双线圈扬声器线圈电路原理接线图。
图 13. 三磁隙三线圈扬声器线圈电路原理接线图 （一)。
图 14. 三磁隙三线圈扬声器线圏电路原理接线图 (二)。
图 15. 四磁隙四线圈扬声器线圈电路原理接线图。
图 16. 2. 0声道多媒体音响系统实施例。
图 17. 2. 1声道多媒体音响系统实施例。
图 18. 三磁隙三线圈内磁式扬声器磁芯与托架安装示意图。
图 19. 四磁隙四线圈内磁式扬声器磁芯与托架安装示意图。
图 20. 已有技术单磁隙单线圈扬声器音频电流与反电动势工作原理示意图。
图 21. 具有对称磁路和对称线圏电路的多磁隙多线圏扬声器音频电流与反电动势工作原理示意图。 本发明图 6至图 15、 图 18和图 19的主要元件与标号对应关系：
极面 - 10CT600; 框架 - 10广 601 ; 框架环形平台 1013^6013； 框架安装螺孔 -- 106Γ6061 ; 框架凸缘 -- 101Γ6011 ; 框架法兰盘 /或套筒 - - 1012~6012； 极板- 103~603； 永磁铁 --- 102~602; 环筒状磁轭 --- 113^613； 环形磁隙- 110^610；
环形磁隙磁力线 199 6991 ; 线圈 109^609； 线圏骨架 107^607；
非导磁托架一 -18广 681 ; 托架内凸圆形平台 1118^6118； 托架内凸圆形平台面- -11180^61180： 托架环形薄壁垂直定位面- - 1820^6820； 托架水平定位面—— 1810^6810； 粘结剂—— 181广 6811 ; …弹波—— 14广 641 ; 振膜 - - - - 106~606；
防尘帽—— 105^605； 悬边—— 199^699； 环形凹槽—— 163 6631 ;
穿透气孔 - - - - 182 82; 非导磁材料紧固件一 3710、 6710；
非导磁压板- 372、 672 非导磁螺母 375、 675
本发明图 5的元件与编号对照表请参阅 CN200610020317. 7的说明书， 本发明不再予以重复。
为了更清楚地了解本发明的新技术方案， 以下将结合说明书附图进行阐述。 具体实施方式
图 1示出了本发明具有音频数字接口的 2. 0声道多媒体音响系统框图。
元件 1为电脑或光碟游戏机 PS2,其通过一个 USB接口 /或 IEEE1394接口 /或同轴电缆接口 /或光纤接口， 向音频数字解码器 (DAC) 2和一组 D类 /或 T类音频功率放大器 3提供 5V/或 8~12V的直流电源和音频数字信 号电平。由此构成一个由电脑或 PS2通用串行数据总线实施控制的外置式 USB单工软声卡或 IEEE1394单工软 声卡。 D类 /或 T类功率放大器 3输出连续功率为 2 X 1W左右的 2. 0声道音频模拟功率， 经左音箱 4再转接 至右音箱 5。 其基本结构和工作原理与已有技术的 USB音响系统相同。
图 2示出了本发明具有音频数字接口的 2. 1声道多媒体音响系统框图。
元件 5与图 1的元件 Γ5相同。 元件 6为重低音扬声器 (低音炮)， 元件 8为电子分频器， 其通频带在 20Hz至 250HZ内选择使用。元件 7为 D类 /或 T类重低音音频功率放大器， 元件 9为同一台 PC或光碟游戏机 PS2的另外一组 USB接口， 为重低音音频功率放大器提供独立的 DC5V电源。 如果釆用 USB 2. 0接口标准， 图 2 的左右声道音箱的最大连续输入功率大约 2 X 1W, 重低音音箱的最大连续输入功率大约 ¾Ξ I X 2W。 如果采 用 USB 3. 0接口标准， 图 1的 2. 0声道多媒体音响系统的最大连续输入功率大约 ¾≡2 X 2W， 重低音音箱的最 大连续输入功率大约 1 X 4W。
图 3示出了模数转换器及数字音频功率放大器集成一体的框图。
音频数字解码器 (DAC) 2和一组 D类 /或 T类音频功率放大器 3被集成在同一块 IC芯片内。 例如， 骅讯 公司的 CM6120S IC 芯片将 DAC和左右声道音频功率放大器 3以及相应的晶振电路、 过负荷热保护、 短路保 护等辅助电路全部整合在同一块 IC芯片内。
图 4示出了本发明具有音频数字接口的 5. 1声道多媒体音响系统框图。 元件 1、 元件 2、 元件 3与图 1所示的元件 1、 元件 2、 元件 3完全相同。 元件 4至元件 8为 5个卫星音 箱， 分别为左前置、 中置、 右前置、 左环绕和右环绕音箱。 元件 11为电子分频器， 其带宽自 20Hz至 250Hz 内按需要选择配置。元件 10为 D类 /或 T类重低音音频功率放大器， 其模拟输出电流被连接到重低音音箱 9。 元件 13是一个独立的交直流供电电源或电池组，为所有元件或除元件 2以外的其它元件提供必需的直流电源。
按照图 4显示的框图，只要选配适当的卫星音箱数量， 本发明同样可以适用于 4. 1、 7. 1声道的数字多媒 体音响系统。
图 5示出了本发明双磁隙双线圏外磁式扬声器实施例的纵剖面图。
这是在本发明人提出的 CN200610020317. 7专利申请基础上作出的技术改进方案。 一个与上极板 203A和 下极板 203B同轴安装的环筒状磁轭 213在轴向高度上分别超出所述上极板和下极板的外侧极面 H = 0. 5~ 8 亳米并形成二组上下对称的磁隙磁路， 所述环筒状磁轭 213的外周面与上极板 203A和下极板 203B中央轴孔 的垂直周面间构成二个同轴等径的环形磁隙 210A和 210B,在这二个环形磁隙内插入同轴等径的二个线圈 209A 和 209B, 所述线圈由 1层 /或 2层电磁线绕制而成， 二个线圈 209A和 209B间设有相应的间隔， 规定二个线 圏的绕向及流经线圏的电流方向， 使二个线圏 209A和 209B在同一工作瞬间产生同一方向的电动力 F; 以上极板 203A和下极板 203B中央轴孔的中心轴线为垂直对称轴， 以所述钕铁硼磁铁二分之一轴向高度 的等分线 X ― X轴线为水平对称轴， 所述扬声器具有在几何形状和磁性能方面左右、 上下对称的二组对称 磁
路， 规定二个线圈 209A和 209B的电磁线横截面积、 线圈圈数、线圈卷幅、线圈电阻、线圈电感量的绝对值、 绕线时的张力彼此相等， 以所述钕铁硼磁铁二分之一轴向高度的等分线 X ― X $由线为水平对称轴， 所述扬 声器具有二组上下对称的线圈电路， 由此， 本发明实施例的二个线圈 209A和 209B的电感量及其在往复式运 动过程中感应得到的反电动势因具有 180度相位角而互相抵消。 本实施例所述的扬声器是一个具有电阻负载 特性或近似于电阻负载特性并具有超高灵敏度、 高保真品质的多磁隙多线圏扬声器。
图 6示出了本发明双磁隙双线圈内磁式扬声器实施例的纵剖面图。
上极板 103A和下极板 103B是二块厚度相等、 投影面积相等、 同轴安装的圆形平板， 一块与之匹配的钕 铁硼磁铁 102被夹持在元件 103A和元件 103B之间。 一个铝合金制作的托架 181的轴心部位设有一个内凸的 圆形平台 1118， 它具有光滑整齐的垂直外圆面， 其直径与元件 103A和 103B的直径匹配。 元件 1118的外侧 设有环形凹槽 1631， 在槽底设有若干个均匀布置的穿透气孔 182， 元件 1631的外侧是托架 181的环形薄壁， 它具有光滑整齐的内外圆垂直面。 在托架 181环形薄壁的一定轴向高度上还设有一个光滑整齐的水平定位面 1810和一个垂直定位面 1820。
在元件 1118的水平安装面 11180上涂布粘结剂， 将已经粘固在一起并充磁极化的磁芯： 元件 103A、 元 件 102和元件 103B放置于上并确保被安装定位在元件 11180的轴心部位。 待粘结剂固化后， 将环筒状磁轭 113套装于上述磁芯的同轴部位同时粘结固定在托架 181的轴心部位， 此时， 元件 113的二个上下端面分别 与元件 103A和 103B的外极面具有相同的 H值 (0_8亳米)， 元件 113的内周面与元件 103A和 103B的垂直周 面间构成二个同轴等径的环形磁隙 110A和 110B。元件 113的上端部被嵌入塑料框架 101底部的圆形轴孔内， 元件 113的外壁被粘结剂与框架底部的凸缘 1011粘结固定。
在所述环形磁隙中插入线圈骨架 107和同轴安装的二个线圈 109A和 109B,这二个线圈由 1层 /或 2层电 磁线绕制而成， 例如从振膜 106方向视入时，设定线圈 109A为顺时针绕向， 线圏 109B为反时针绕向（反之亦 然)。规定线圈 109A和线圈 109B的电磁线横截面积、线圈圈数、线圈卷幅、线圈电阻、线圈电感量的绝对值、 绕线时的张力彼此相等， 由此构成以元件 102的二分之一轴向高度的等分线 X— -X轴线为水平对称轴、 以元 件 103A、 元件 102和元件 103B的中心轴线为垂直对称轴的二组在几何形状和磁性能方面上下、 左右对称的 磁路及线圈电路。 然后将弹波 141、 线圈骨架 107、 振膜 106及悬边 199、 框架 101分别粘结固定在一起。
参照图 10所示，若元件 103A和元件 103B的外侧极面与元件 113的二个端面间的距离为 H值且大于 0. 4 亳米时， 只要根据扬声器的口径和磁路适当选择 H值， 即可获得以元件 103A和元件 103B二分之一轴向高度 的等分线 Z-— Z轴线为对称轴的二组磁隙对称磁路， 磁隙中的磁力线 1991如图 10所示， 由此， 本实施例的 二个线圏 109A和 109B的电感量及其在往复式运动过程中感应得到的反电动势因具有 180度相位角而互相抵 消。 本发明实施例所述的扬声器是一个具有电阻负载特性或近似于电阻负载特性并具有超高灵敏度、 高保真 品质的多磁隙多线圈扬声器。
图 12示出了本发明双磁隙双线圈扬声器线圏电路原理接线图。
以图 6为实施例： 线圈 109A与线圈 109B的电磁线横截面积、 线圈圈数、 线圈卷幅、 线圈电阻、 线圈电 感量的绝对值、 绕线时的张力彼此相等但绕向相反， 因此， 线圏 109A及 109B中流过音频电流时形成的电感 量 I L109A I的矢量值与 I L109B |的矢量值相等但相位角为 180度， 从而使对称线圈电路中的电感量等于零或接 近于零， 扬声器具有电阻负载特性或近似于电阻负载特性。 毫无疑问， 图 5实施例的外磁式扬声器亦可按此 实施。
图 7示出了本发明三磁隙三线圈内磁式扬声器实施例的纵剖面图。
在一块圆形极板 303B的两侧平面上分别粘结一块轴向充磁的钕铁硼磁铁 302A和 302B, 在磁铁 302A和 302B的外侧面又分别粘结一块圆形极板 303A和 303C, 二块磁铁的极性 (N极和 S极)如图 7所示， 三块极板 具有相同的投影面积且与二块磁铁匹配， 元件 303A和 303C的厚度相等， 元件 303B的厚度较元件 303A的厚 度足够大以确保流过它的磁力线不致饱和。 由此构成一对同轴安装的相斥型磁铁磁芯。 将所述磁芯置放于预 先涂布粘结剂的铝合金托架 381的内凸圆形平台面 31180上， 再通过必要的工装确保所述磁芯与环筒状磁轭 313被同轴安装在元件 31180的轴心部位上。 此时， 元件 313的二个上下端面分别与元件 303A和 303C的外 极面具有相同的 H值 (0-8毫米)， 元件 313的内周面与元件 303A、 元件 303B、 元件 303C的垂直周面间构成 同轴等径的三个环形磁隙 310A、 310B和 310C。 元件 313的上端部粘结固定一个塑料法兰盘 3012， 它们具有 相同的安装平面。 元件 313的下端部嵌入铝合金托架 381的水平定位面 3810和垂直定位面 3820并用粘结剂 粘结固定。 撤去工装后在所述环形磁隙中插入线圈骨架 307和同轴安装的三个线圈 309A、 309B和 309C, 这 三个线圏由 1层 /或 2层电磁线绕制而成，例如从振膜 306方向视入时，设定线圏 309A和 309C为顺时针绕向， 线圈 309B为反时针绕向 (反之亦然）。 元件 309A的尾端 YA与元件 309B的首端 XB串接， 元件 309B的尾端 YB 与元件 309C的首端 C串接， 元件 309C的尾端 YC沿元件 307垂直引上与元件 309A的首端 XA构成所述扬声 器的一对信号输入端子，规定元件 309A、元件 309B和元件 309C的电磁线横截面积、绕线时的张力彼此相等， 规定元件 309A和元件 309C的线圈圈数、线圈卷幅、线圈电阻、线圈电感量的绝对值彼此相等，规定元件 309B 的线圏圏数、 线圏卷幅、 线圏电阻、 线圏电感量的绝对值与元件 309A和 309C的线圏圏数、 线圏卷幅、 线圏 电阻、线圈电感量的绝对值之和彼此相等， 由此构成以所述相斥型磁铁中心轴线为垂直对称轴， 以元件 303B 的二分之一轴向高度的等分线 X— X轴线为水平对称轴的二组对称磁路和二组对称线圈电路。具体的磁路结构 和三个线圈的电路原理接线图请分别参见本发明图 13A和图 13B或图 14A和图 14B所示 (详情请参见本发明人 提出的 TO 99/31931专利族的相关专利文献而不再在本发明中予以重复描述)。
再将弹波 341、线圈骨架 307、振膜 306及悬边 399、 防尘帽 305、框架 301分别粘结固定在一起， 由此， 本发明实施例的三个线圏 309A、 309B和 309C的电感量及其在往复式运动过程中感应得到的反电动势因具有 180度相位角而互相抵消。 本发明实施例所述的扬声器是一个具有电阻负载特性或近似于电阻负载特性并具 有超高灵敏度和高保真品质的多磁隙多线圈扬声器。
图 8示出了本发明四磁隙四线圈内磁式扬声器实施例的纵剖面图。
所述框架是一个铝合金构成的框架 601， 框架 601的轴心部位至少设有二个圆形轴孔， 601在不同 的轴向高度上设有安装 2个弹波 641的环形平台面。在一块极板 603B的两侧平面上分别粘结一 ±夬轴向充磁的 钕铁硼磁铁 602A和 602B, 上述磁铁在紧靠极板 603B的一侧具有相同的 S极极性， 二块磁铁 602A和 602B的 外侧极面又分别粘结一±夬极板 603A和 603C, 在极板 603C的外侧再粘结钕铁硼磁铁 602C, 在元件 602C 的夕卜侧再粘结极板 603D, 由此构成二对以上相斥型磁铁， （它们的极性请参阅图 7所示)同轴安装的 4 ±夬极板 具有相同的投影面积且与 3 ±夬钕铁硼磁铁匹配并构成一个所述磁路磁芯。 一个铝合金制作的托架 681 及一 个与所述磁芯同轴安装的环筒状磁轭 613……， 以及框架 601、 弹波 641、振膜 606、 悬边 699的结构、 安装， 以及极板 603A和 603D外侧极面与环筒状磁轭二个端面构成磁隙对称磁路等内容请参阅本发明上述实施例而 不再予以重复描述。
所述环筒状磁轭 613的内周面与所述 4 ±夬极板的垂直周面间构成 4个同轴等径的环形磁隙， 由此插入线 圈骨架 607及同轴安装的 4个线圈， 所述线圈由 1层 /或 2层电磁线绕制而成……。
当位于外侧的二个线圏 609A和 609D从振膜外侧方向视入时分别具有顺时针绕向及反时针绕向，居中的 二个所述线圈 609B和 609C必须对应具有反时针绕向及顺时针绕向， 反之亦然， 线圈 609A 的尾端 YA与线 圈 609B的首端 XB串接， 线圈 609B的尾端 YB与线圈 609C的首端 XC串接， 线圈 609C的尾端 YC与线圈 609D 的首端 XD串接，线圈 609D的尾端 YD沿线圏骨架 607垂直引上与线圏 609A的首端 A构成所述扬声器的一对 信号输入端子， 规定 4个线圈 609A与 609D/ 609B与 609C的电磁线横截面积、 线圈圈数、 线圈卷幅、 线圈电 阻、线圏电感量的绝对值、绕线时的张力彼此相等， 由此构成以所述居中磁铁 602B的二分之一轴向高度的等 分线 X ― X轴线为水平对称轴的二组上下对称的线圏电路， 4个所述线圈的电感量以及在往复运动过程中 感应得到的反电动势因具有 180度相位角而互相抵消， 所述扬声器是一个具有电阻负载特性或近似于电阻负 载特性并具有超高灵敏度和高保真品质的多磁隙多线圈内磁式扬声器。
图 13示出了三磁隙三线圈扬声器线圈电路原理接线图（一)、图 14示出了三磁隙三线圈扬声器线圈电路 原理接线图（二)、 图 15 示出了四磁隙四线圏扬声器线圏电路原理接线图。 其工作原理的有关说明请参阅 CN200820092177. 9专利申请文献的相应附图及说明书而不再予以重复描述。毫无疑问， 按照本实施例阐述的 内容， 普通技术人员很容易通过增加极板和磁铁数量的方法实施成功四个以上磁隙和四个以上线圈的多磁隙 多线圈内磁式扬声器。
至于四个以上磁隙和四个以上线圈的扬声器电路原理接线图， 最简单的方式是通过两条垂直设置的铜箔 将所有线圈并联在一起， 如本发明人在 CN2437092Y专利中所描述的那样。这是，等效阻抗和反电动势将变得 相当微不足道。
图 9示出了已有技术夕 hi则极板的磁隙磁力线分布示意图。
图 9实质上是本发明图 6实施例的一个节点放大示意图。元件 103A是扬声器的一 ±夬外侧极板，其二分之 一轴向高度的水平等分线为 Z-— Z轴线。由图 9可见，此时的极板外侧极面 103A与环筒状磁轭 113的端面齐 平，即相当于图 6标示的 H值= 0。环形磁隙 110A中的永磁磁力线 1991在 Z-— Z轴线的两侧呈现不对称状态。 如果在磁隙中插入图 6所示的线圏 109A, 该线圏的二分之一轴向高度的水平等分线与 Z-— Z轴线重叠。 当线 圈 109A中流过音频电流时，其在 Z-— Z轴线上部与下部的永磁磁力线分布形状不同密度不等，因而线圈 109A 的 Z-— Z轴线上部和下部将产生不同的电动力 F， 使线圈受到扭曲变形从而增加扬声器的失真。
图 10示出了本发明外侧极板的磁隙磁力线分布示意图。
这时 H>0， H值与扬声器的口径及磁铁的几何尺寸及磁能积有密切的关系。 由图 10可见， 在 Z-— Z轴钱的两 侧， 永磁磁力线 1991始终呈对称状态， 图 9所示的已有技术缺陷得到了纠正。
图 11示出了本发明对称磁路及对称线圏电路中反电动势相互抵消的工作原理示意图。
其中， 图 11A示出了本发明诸实施例中扬声器 X—X轴线一侧的线圈 (例如图 6的元件 109A)内输入一 个正弦波音频电流信号的波形及其在过零点时感应得到的反电动势尖脉冲波形。 图 11B示出了本发明诸实施 例中扬声器 X— -X轴线另一侧的线圈 (例如图 6的元件 109B)内输入一个正弦波音频电流信号的波形及其在过 零点感应得到的反电动势尖脉冲波形。 由上述两图可见， 二个对称线圏内的正弦波音频电流信号具有 180度 相位角， 符合本发明的实施规定。 图 11C示出了本发明诸实施例中扬声器 X— X轴线一侧的线圏 (例如图 6 的元件 109A)内感应得到的反电动势尖脉冲波形。 图 11D示出了本发明诸实施例中扬声器 — X轴线另一侧 的线圈 (例如图 6的元件 109B)内感应得到的反电动势尖脉冲波形。由于 X— -X轴线两侧的二个线圏的绕向相 反， 因此， 这二个线圈内感应得到的反电动势因具有 180度相位角而相互抵消为零或近似为零。
为了更好地阐述扬声器线圏中反电动势的相关问题，图 20示出了已有技术单磁隙单线圏扬声器音频电流 与反电动势工作原理示意图。 元件 1为音频信号源， 元件 2为传统的单磁隙单线圏扬声器， 元件 2'为单磁隙 单线圈扬声器的等效发电机电势即反电动势信号源， 元件 3为扬声器发电机状态运行时的等效负载。 由图 20 的下部图可见： 当单磁隙单线圈扬声器被接通音频信号源时， 在所述扬声器中流过一个瞬间音频电流 I， 所 述扬声器产生一个对应的电动力 F, 它们的方向如图所示。 这时， 由图 20的上部图可见： 由于单磁隙单线圈 扬声器的线圏在电动力 F的作用下作往复式活塞运动并垂直切割磁隙中的永磁磁力线而成为一个发电机 2， ， 其等效负载为元件 3， 发电机电势即反电动势的流向如 E所示， 与线圏内的音频电流 I具有 180度相位角 (忽 略寄生电容及电感的影响)经叠加后造成音频信号失真。
图 21 示出了本发明具有对称磁路和对称线圈电路的多磁隙多线圈扬声器音频电流与反电动势工作原理 示意图。由图 21的下部图可见：所述扬声器被接通音频信号源 21时，在二个反向绕制的扬声器对称线圈 23A 和 23B中流过一个瞬间音频电流 I，二个对称线圈产生二个对应的电动力 FA和 FB，其方向相同而形成合力 F。 由图 21的上部图可见:由于多磁隙多线圏扬声器的二个对称线圏在电动力 F的作用下作往复式活塞运动并垂 直切割磁隙中的永磁磁力线而成为二个等效发电机 23A' 和 23B' ，由于这二个线圈的绕向相反且具有对称磁 路和对称线圈电路特性， 因此二个线圈的发电机电势绝对值相等且具有 180度相位角， 反电动势 EA和 EB流 过等效负载 24时被互相抵消或近似抵消。
图 18示出了本发明三磁隙三线圈内磁式扬声器磁芯与托架安装示意图。
图 19示出了本发明四磁隙四线圏内磁式扬声器磁芯与托架安装示意图。
这是从图 7、 图 8中分离出来的磁路结构安装图。
由前述可见： 本发明提出了具有三磁隙三线圈、 四磁隙四线圈甚至更多磁隙和更多线圈的内磁式扬声器 技术方案。在这些扬声器技术方案中， 安装在某一块圆形极板的两侧磁铁具有相同的极性 . . .，从而构成至少 一对或一对以上相斥型磁铁及所述磁路磁芯。 当这些磁铁具有较大的几何尺寸和高磁能积时， 相斥型磁铁之 间的轴向推力会变得非常巨大，不仅给磁芯的粘结固定工艺增加难度， 而且还对扬声器的可靠运行带来新的 不稳定因素。 图 18和图 19示出了一种新技术方案： 在所述极板和所述磁铁的轴心部位设有投影面积相等的 中央轴孔， 所述扬声器使用非导磁材料制成的所述托架 381或 681的轴心部位也设有一个投影面积与之相等 的中央轴孔 /或与之匹配的螺孔，一根非导磁材料例如 lCrl8Ni_9Ti不锈钢制成的紧固件 3710或 6710穿过所 述轴孔并利用一块与所述极板匹配的非导磁材料制成的压板 372或 672对所述极板和所述磁铁施加足够的静 压力并使它们粘结固定在所述扬声器的所述托架内凸平台面 31180或 61180上。
图 18和图 19显示了一种借助螺杆 3711或 6711与螺母 375或 675的设定扭矩对所述磁芯施加静压力。 基于公知的技术： 只要将图示的紧固件 3710或 6710旋转 180度并将托架 381或 681的所述中央轴孔改为与 螺杆匹配的螺孔， 通过调节螺帽 371或 671的扭矩对压板 372或 672施加静压力， 所述磁芯同样可以被所述 紧固件 3710或 6710粘结固定在所述托架 381或 681的内凸平台面 31180或 61180上。 基于公知的技术： 如 果将非导磁的不锈钢紧固件 3710或 6710置换成一根带有半圆头的铝铆钉， 通过适当的加压可以使所述铆钉 的尾部翻铆在托板 372或 672上， 所述磁芯同样可以粘结固定在扬声器托架 381或 681的内凸平台面 31180 或 61180上。
图 16示出了本发明 2. 0声道多媒体音响系统实施例。
其中， 16-A示出了一个 2. 0声道 USB音响系统的左音箱正面视图。音箱内设有一个 3英寸口径的双磁隙 双线圏扬声器 1，扬声器具有所述的对称磁路和对称线圏电路并仅仅具有一个圆锥形振膜 8，其锥顶的中孔直 径不超过 Φ 26毫米。音箱 2是一对木质的书架式密闭箱。一个铝合金支架 3通过紧固件与音箱箱体连接固定。 音箱 2的底部和支架 3的顶部连接处设有密封的孔洞以便穿越扬声器的音频连接电线。 支架 3正面的颈口部 位设有一个 USB Mini接口插座 4， 一个 Φ 3. 5亳米音频电流输出插座 6安装在支架 3背面的颈口部位， 如图 16-C所示。 一±夬 PCB板 7安装在左音箱铝合金支架 3的颈部， 其上设有一组本发明所述的 USB DAC和一组双 声道 D类音频功率放大器 IC芯片及附属的 SMD贴装电子元件、过负荷热保护电路、短路保护电路等附属电路 均整合在同一颗 IC芯片内。本实施例音频功率放大器在额定电压下的最大连续输出功率为 2 X 1W。 图 16-B 示出了一个 2. 0声道 USB音响系统的右音箱背面视图。 它的音箱箱体与右音箱完全相同。 同样拥有一个铝合 金支架 3，一个 Φ 3. 5毫米音频电流输入插座 6装在支架颈部的背面，通过一根音频连接电缆将上述左右音箱 连接成为一对具有 2. 0声道的 USB音频数字接口多媒体音响系统。
在本实施例中， 左右音箱为等容积封闭箱。 3英寸口径扬声器 1为同轴共点发声的全频带扬声器， 即使 釆用 16 Bit转换精度的 DAC， 音箱输出的声音十分宏亮，声像定位精确，音质细腻逼真，音色甜美丰满， 细节表演淋漓尽致， 解析力明显高于传统高档多媒体对箱， 频响范围为 80Hz〜20KHz。
图 17示出了本发明 2. 1声道多媒体音响系统实施例。
图 17-A示出了左右声道音箱的正面视图。每个音箱设有一个 4英寸口径的双磁隙双线圏扬声器 1， 扬声 器具有对称磁路和对称线圈电路并且仅仅只有一个圆锥形振膜 4， 其锥顶的中孔直径不超过 Φ 26亳米。 音箱 是一对木质的书架式等容积开口箱。 图 17-B示出了左右声道音箱的背面视图。 在接线合 11上设有一个 Φ 3. 5毫米的音频电流输入插座 7， 倒相管出风口 8和防震垫 10。 图 17-C示出了重低音音箱的正面视图。 其面 板 30上设有一个 USB输入接口 39、 LED信号灯 36、 静音按钮 35、 音量调节按钮 34和 33、 倒相管出风口 38 和二个 Φ 3. 5亳米的音频电流输出插座 37。 一块 PCB板 310设置在重低音音箱内部， 其上安装一组 DAC、 一 组 2. 0声道 D类音频功率放大器、 一组通频带宽为 40Hz~150Hz的电子分频器、 一组重低音 D类音频功率 放大器及配套的不超过 100, 000 的滤波储能电解电容、必需的控制电路、过负荷热保护电路、短路保护电 路和 SMD表面贴装电子元件等。 图 17-D示出了重低音音箱的侧面视图。 其面板 32上设有一个 6. 5英寸口径 的重低音扬声器 31， 它是一个三磁隙三线圈 /或四磁隙四线圈、 通频带宽为 40Hz~150Hz、 具有所述对称磁路 和对称线圈电路、 电阻负载特性或近似于电阻负载特性的带通式重低音扬声器， 并且只有一个圆锥形振膜。 锥顶的中孔直径不超过 Φ 33亳米。 在重低音箱的背板上还设有另外一个为重低音扬声器提供 DC5V独立电源 的 USB输入接口， 但本图省略未予标绘。
本发明具有以下有益效果：
1.仅仅利用 PC USB接口提供的 2 X 1 W/或 2 X 2W音频输出功率， 去推动一对不大于 7英寸口径的单振膜 全频带扬声器并由此构成一个 2. 0声道的节能型数字多媒体音响系统。
2.仅仅利用 PC USB接口提供的（2 X 1 ) W+ ( 1 X 2) W/或 (2 X 2 ) W+ ( 1 X 4) W音频输出功率， 去推动一对不 大于 7英寸口径的单振膜全频带扬声器和一个不大于 7英寸口径的单振膜重低音扬声器并由此构成一个 2. 1 声道的节能型数字多媒体音响系统。
3.突破了扬声器反电动势制约扬声器效率提高这一困扰世界电声领域 130多年的技术难题。
4.在 2. 0声道和 2. 1声道的数字多媒体音响系统中， 淘汰了传统的电源变压器、 高音扬声器、 分频器和 功率放大器铝散热器。 节省了大量的宝贵的社会资源。
5.为电脑消费者提供一种最简单最安全的多媒体音响操作使用方案。
6.可以通过局域网和互联网实施电脑的远程实时监听。
7.本发明取得了预料不到的技术效果。 利用本发明人的已有专利技术的组合发明及其改进技术方案， 使 传统电脑的 2. 0及 2. 1声道有源多媒体音响系统转变为无源数字多媒体音响系统。 据保守估测， 每台电脑平 均节省 20W电能， 可以为拥有 10亿台全球保有量的电脑环保节能事业作出突出的贡献。
最后需要指出的是： 利用本发明图 1至图 21示出的以及 A专利族、 B专利族、 C专利族提出的所有磁路 结构型式以及不同的扬声器线圈电路连接方式， 可以排列组合成各种不同类型的外磁式和内磁式全频带扬声 器及相应的多媒体音响系统。 本发明虽然无法将所有这些实施例一一枚举出来， 但是， 不管将本发明的上述 技术特征如何排列组合甚至作出这样或那样的局部修改， 它们的总体技术方案和发明核心内容都无法超越本 发明权利要求和本说明书已经提出的覆盖范围。

Claims

权利要求书
1. 具有音频数字接口的多媒体音响系统，包括电脑 /或光碟游戏机 PS2的至少一个 USB接口 /或 IEEE1394 接口 /或同轴电缆接口 /或光纤接口， 一组与 USB/或 IEEE1394接口连接的 2. 0声道外置声卡及与之匹配的 D 类 /或 T类音频功率放大器 IC芯片，一组与所述 2. 0声道外置声卡及所述音频功率放大器匹配的控制保护电 路 /或微处理器 IC芯片， 一对左右声道音箱， 其特征是：
所述 2. 0声道外置声卡、所述 IC芯片及与之关联的 SMD表面贴装元件 /或集成在一起的 CMOS电路、指示 所述外置声卡工作状态的 LED信号灯、所述音频功率放大器的音量调节装置均安装在 /或通过电线和插接件连 接到 PCB板上，所述 PCB板固定安装在所述左声道音箱内 /或音箱支架内，所述 LED信号灯及所述音量调节装 置固定在所述左声道音箱面板 /或音箱支架上， 所述 PCB板 /或所述左声道音箱面板上还设有一个与所述接口 匹配的插座 /或通过一根接口延长线的插头与电脑 /或光碟游戏机 PS2的所述接口相连接， 所述右声道音箱的 面板上也设有一个音频插座， 一根音频电缆将所述左右声道音箱连接成为一个 2. 0声道音响系统；
所述 2. 0声道外置声卡至少具有一组单工的 16 ~ 48 Bit的立体声数模解码器 DAC， 所述 DAC及所述 IC 芯片由电脑 USB接口的 5V电源供电并在最靠近所述 DAC及所述 IC芯片电源输入脚处各自并联一组兼有滤波 和储能功效的电解电容器， 规定所述音频功率放大器的额定工作电压下限值比所述 DAC的额定工作电压下 限值要低 1. Γ2. 7V， 以便所述扬声器输出一个足够宽度的大动态低音频信号时所述音频功率放大器及所述 DAC的瞬间工作电压基本上不超越额定工作电压的下限值；
所述左右声道音箱内分别设有至少一个具有电阻负载特性或近似于电阻负载特性的多磁隙多线圏扬声 器， 规定所述多磁隙多线圈扬声器仅仅配置一个 Φ 7英寸口径的圆锥形振膜 /或内凹形振膜， 规定所述圆锥 形振膜的中孔直径不超过 Φ26~ Φ 33 毫米， 由此构成二个同轴共点发声、 所述多磁隙多线圈扬声器的电感量 及其在往复运动过程中感应得到的反电动势因具有 180度相位角而互相抵消的全频带扬声器；
规定所述音频功率放大器的额定工作电压 DC 5. 25V/或 iSDC 8~15V 、 所述音频功率放大器每声道的额 定连续输出功率 1W/或 2W,由此构成一种通过 USB接口 /或 IEEE1394接口供电的具有超高灵敏度和高保 真品质的 2. 0声道数字多媒体音响系统。
2. 具有音频数字接口的多媒体音响系统，包括电脑 /或光碟游戏机 PS2的至少一个 USB接口 /或 IEEE1394 接口 /或同轴电缆接口 /或光纤接口， 一组与 USB/或 IEEE1394接口连接的 2. 1声道外置声卡及与之匹配的 D 类 /或 T类 2. 1声道音频功率放大器 IC芯片，一组与所述 2. 1声道外置声卡及所述音频功率放大器匹配的控 制保护电路 /或微处理器 IC芯片， 一对左右声道音箱及一个重低音音箱， 其特征是：
所述 2. 1声道外置声卡、所述 IC芯片及与之关联的 S 表面贴装元件 /或集成在一起的 CMOS电路、指示 所述外置声卡工作状态的 LED信号灯、 所述 2. 1声道音频功率放大器的音量调节装置均安装在 PCB板上， 所 述 PCB 板、 所述 LED 信号灯、 所述音量调节装置安装在所述重低音音箱内 /或其面板上， 所述 PCB 板 /或所述重低音音箱的面板上还设有二个与所述接口匹配的插座 /或通过一根接口延长线的插头与电脑 /或 光
碟游戏机 PS2的所述接口相连接， 所述左右声道音箱面板上也设有一个音频插座， 二根音频电缆将所述左右 声道音箱与重低音音箱连接成为一个 2. 1声道音响系统；
所述 2. 1声道外置声卡至少具有一组单工的 16 ~ 48 Bit 2. 1声道数模解码器 DAC， 其中左右声道信号 经由所述 DAC连接至所述左右声道音频功率放大器 IC芯片， 另外一路重低音声道模拟信号经由通频带宽为 20Hz至最高为 250Hz的电子分频器连接至所述重低音音频功率放大器；
当所述电脑为 PC时， 所述 DAC和所述左右声道音频功率放大器由 PC的一个 USB接口提供 5V 电源， 所 述重低音音频功率放大器则由 PC的另外一个 USB接口提供 5V 电源； 当所述电脑为苹果机时， 所述 DAC、 所述左右声道音频功率放大器、 所述电子分频器、 所述重低音功率放大器均由同一个 IEEE1394接口提供 DC 8~15V 电源；
所述 DAC及所述左右声道音频功率放大器 IC芯片由电脑 USB接口的 5V电源供电并在最靠近所述 DAC及 IC芯片电源输入脚处各自并联一组兼有滤波和储能功效的电解电容器，规定所述音频功率放大器的额定工作 电压下限值比所述 DAC的额定工作电压下限值要低 1. Γ2. 7V, 以便所述扬声器输出一个足够宽度的大动态低 音频信号时所述音频功率放大器及所述 DAC的瞬间工作电压基本上不超越工作电压的下限值，
所述重低音音频功率放大器 IC 芯片在最靠近电源输入脚处单独并联一组兼有滤波和储能功效的容量≤≡ 1, 000 ~ 100, 000 y F的电解电容;
所述左右声道音箱内分别设有至少一个具有电阻负载特性或近似于电阻负载特性的多磁隙多线圏扬声 器， 规定所述多磁隙多线圈扬声器仅仅配置一个 Φ 7英寸口径的圆锥形振膜 /或内凹形振膜， 规定所述圆锥 形振膜的中孔直径不超过 Φ 26~ Φ 33 毫米， 由此构成二个同轴共点发声、 所述多磁隙多线圈扬声器的电感量 及其在往复运动过程中感应得到的反电动势因具有 180度相位角而互相抵消的全频带扬声器，
所述重低音音箱内设有一个具有电阻负载特性或近似于电阻负载特性的多磁隙多线圈扬声器， 规定所述 多磁隙多线圏扬声器仅仅配置一个 ¾Ξ Φ 7英寸口径的圆锥形振膜 /或内凹形振膜，规定所述圆锥形振膜的中孔 直径不超过 Φ 26~ Φ 33 毫米， 由此构成一个同轴共点发声、 所述多磁隙多线圏扬声器的电感量及其在往复运 动过程中感应得到的反电动势因具有 180度相位角而互相抵消的带通式重低音扬声器；
规定所述音频功率放大器的额定工作电压 DC 5. 25V/或 DC 8^15V 、 所述左右声道音频功率放大器每 声道的额定连续输出功率 1W/或 2W, 所述重低音音频功率放大器的额定连续输出功率 或 4W, 由此构成一种通过 USB接口 /或 IEEE1394接口供电的具有超高灵敏度和高保真品质的 2. 1声道数字多媒体音 响系统。
3. 具有音频数字接口的多媒体音响系统，包括电脑 /或光碟游戏机 PS2的至少一个 USB接口 /或 IEEE1394 接口 /或同轴电缆接口 /或光纤接口， 一组与 USB/或 IEEE1394接口连接的 4. 1 ~ 7. 1声道外置声卡及与之匹 配
的 D类 /或 T类音频功率放大器 IC芯片，一组与所述 4.广7. 1声道外置声卡及所述音频功率放大器匹配的控 制保护电路 /或微处理器 IC芯片， 4 ~ 7个卫星音箱及一个重低音音箱， 其特征是：
所述 4. Γ 7. 1声道外置声卡、 所述 IC芯片及与之关联的 SMD表面贴装件 成在一起的 CMOS电路、 指示所述外置声卡工作状态的 LED信号灯、 所述 4. Γ 7. 1声道音频功率放大器的音量调节装置均安装在 PCB 板上， 所述 PCB板、 所述 LED信号灯、 所述音量调节装置均安装在所述重低音音箱内 /或其面板上， 所述 PCB 板 /或所述重低音音箱面 fei还设有一个与所述接口匹配的插座 /或通过一根接口延长线的插头与电脑 /或光 碟游戏机 PS2的所述接口相连接， 所述 4 ~ 7个卫星音箱的面板上还分别设有一个音频插座， 4 ~ 7根音频 电缆将所述 4 7个卫星音箱与重低音音箱连接成为一个 4. Γ 7. 1声道音响系统；
所述 4. Γ7. 1声道外置声卡至少具有一组单工的 16 ~ 48 Bit 4.广 7. 1声道数模解码器 DAC, 其中 Γ7 声道信号经由所述 DAC连接至与之匹配的所述 4~7声道音频功率放大器 IC芯片， 另外一路重低音声道模拟 信号经由通频带宽为 20 Hz至最高为 250Hz的电子分频器连接至所述重低音音频功率放大器；
所述 4. Γ7. 1声道外置声卡由所述 USB接口 /或 IEEE1394接口供电， 所述 4~7声道音频功率放大器、 所 述重低音音频功率放大器、所述控制保护电路 /或微处理器 IC芯片由设置在所述重低音音箱内的一个交 /直流 电源独立供电，所述 DAC及所述 Γ7声道音频功率放大器 IC芯片最靠近所述 DAC及 IC芯片电源输入脚处各 自并联一组兼有滤波和储能功效的电解电容器， 以便所述扬声器输出一个足够宽度的大动态低音频信号时所 述音频功率放大器及所述 DAC的瞬间工作电压基本上不超越额定工作电压的下限值，
所述重低音音频功率放大器 IC 芯片最靠近电源输入脚处单独并联一组兼有滤波和储能功效的容量 1, 000 100, 000 μ F的电解电容储能放电电路；
所述 Γ7个卫星音箱内分别设有至少一个具有电阻负载特性或近似于电阻负载特性的多磁隙多线圈扬声 器， 规定所述多磁隙多线圏扬声器仅仅配置一个 ¾Ξ Φ 7英寸口径的圆锥形振膜 /或内凹形振膜， 规定所述圆锥 形振膜的中孔直径不超过 Φ26~ Φ 33亳米， 由此构成 4~7个同轴共点发声、 所述多磁隙多线圈扬声器的电感 量及其在往复运动过程中感应得到的反电动势因具有 180度相位角而互相抵消的全频带扬声器；
所述重低音音箱内设有一个具有电阻负载特性或近似于电阻负载特性的多磁隙多线圈扬声器， 规定所述 多磁隙多线圈扬声器仅仅配置一个 ¾Ξ Φ 10英寸口径的圆锥形振膜 /或内凹形振膜， 规定所述圆锥形振膜的中 孔直径不超过 Φ 26~ Φ 33亳米， 由此构成一个同轴共点发声、 所述多磁隙多线圈扬声器的电感量及其在往复 运动过程中感应得到的反电动势因具有 180度相位角而互相抵消的带通式重低音扬声器；
规定所述 4~7声道音频功率放大器的每声道额定连续输出功率 1W,所述重低音音频功率放大器的额定 连续输出功率 ¾Ξ 4W ~ 8W， 由此构成一种通过独立交 /直流电源供电的具有超高灵敏度和高保真品质的 4. Γ7. 1声道数字多媒体音响系统。
4. 按照权利要求 3所述的具有音频数字接口的多媒体音响系统，其特征是：安装在所述重低音音箱内除 带通式重低音扬声器以外的所有元件及装置， 均可以从重低音音箱内分离出来构成一个独立的功率放大器； 所述独立功率放大器的面板上设有必要的指示调节设备、 音频输入接口和音频输出插座， 所述 4~7个卫星音 箱及所述重低音音箱的面板上分别设有一个音频插座， 5~8根音频电缆将所述独立功率放大器与所述 (4+1) ~ (7+1)个音箱连接成为一个 4. 1 (+1) ~7. 1 (+1)声道的数字多媒体音响系统。
5. 按照权利要求 1或权利要求 2或权利要求 3所述的具有音频数字接口的多媒体音响系统， 其特征是: 所述多磁隙多线圈扬声器是一个双磁隙双线圈扬声器， 所述扬声器具有二块同轴安装并对称设置的上极板和 下极板，所述上极板和下极板是二块具有中央轴孔的圆环形平板，一块厚度方向充磁极化的圆环状磁铁 /或钕 铁硼磁铁被夹持在所述上极板和下极板之间并互相匹配， 一个与所述上极板和下极板同轴安装的环筒状磁性 体在轴向高度上分别超出所述上极板和下极板的外侧极面 0. 5~ 8毫米并形成二组上下对称的磁隙磁路，所述 环筒状磁性体的外周面与所述上极板和下极板中央轴孔的垂直周面间构成二个同轴等径的环形磁隙， 在所述 环形磁隙内插入同轴等径的二个线圈，所述线圈由 1层 /或 2层电磁线绕制而成，二个所述线圈间设有相应的 间隔， 规定二个所述线圈的绕向及流经线圈的电流方向， 使二个所述线圈在同一工作瞬间产生同一方向的电 动力 F;
以所述上极板和下极板中央轴孔的中心轴线为垂直对称轴，以所述磁铁 /或钕铁硼磁铁二分之一轴向高度 的等分线 X ― X轴线为水平对称轴， 所述扬声器具有在几何形状和磁性能方面左右、 上下对称的二组对称 磁路，
规定二个所述线圈的电磁线横截面积、 线圈圈数、 线圈卷幅、 线圈电阻、 线圈电感量的绝对值、 绕线时 的张力彼此相等， 以所述磁铁 /或钕铁硼磁铁二分之一轴向高度的等分线 X― X $由线为水平对称轴， 所述扬 声器具有二组上下对称的线圈电路， 由此构成一种具有电阻负载特性或近似于电阻负载特性的双磁隙双线圈 外磁式全频带扬声器或带通式重低音扬声器。
6. 按照权利要求 1或权利要求 2或权利要求 3所述的具有音频数字接口的多媒体音响系统， 其特征是: 所述多磁隙多线圈扬声器是一个双磁隙双线圈扬声器， 所述扬声器具有二块同轴安装并对称设置的上极板和 下极板，所述上极板和下极板是二块圆形平板，一±夬厚度方向充磁极化的圆片状磁铁 /或钕铁硼磁铁被夹持在 所述上极板和下极板之间并互相匹配， 一个与所述上极板和下极板同轴安装的环筒状磁性体在轴向高度上分 别超出所述上极板和下极板的外侧极面 0. 5~8毫米并形成二组上下对称的磁隙磁路， 所述环筒状磁性体的内 周面与所述上极板和下极板的垂直周面间构成二个同轴等径的环形磁隙， 在所述环形磁隙内插入同轴等径的 二个线圈，所述线圈由 1层 /或 2层电磁线绕制而成， 二个所述线圏间设有相应的间隔， 规定二个所述线圈的 绕向及流经线圏的电流方向， 使二个所述线圏在同一工作瞬间产生同一方向的电动力 F;
以所述上极板和下极板的中心轴线为垂直对称轴，以所述磁铁 /或钕铁硼磁铁二分之一轴向高度的等分线 X ― X轴线为水平对称轴， 所述扬声器具有在几何形状和磁性能方面左右、 上下对称的二组对称磁路， 规定二组所述线圏的电磁线横截面积、 线圏圏数、 线圈卷幅、 线圈电阻、 线圏电感量的绝对值、 绕线时的张 力彼此相等， 以所述磁铁 /或钕铁硼磁铁二分之一轴向高度的等分线 X― X轴线为水平对称轴， 所述扬声 器具有二组上下对称的线圏电路， 由此构成一种具有电阻负载特性或近似于电阻负载特性的双磁隙双线圏内 磁式全频带扬声器或带通式重低音扬声器。
7. 按照权利要求 1或权利要求 2或权利要求 3所述的具有音频数字接口的多媒体音响系统， 其特征是: 所述多磁隙多线圏扬声器是一个三磁隙三线圏扬声器， 一±夬磁性材料制作的圆形极板的两侧平面上分别安装 一±夬在厚度方向充磁极化的圆片状磁铁 /或钕铁硼磁铁，所述磁铁在紧靠所述极板的一侧具有相同的极性，所 述磁铁的外侧平面上又分别安装一 ±夬磁性材料制作的圆形极板， 由此构成一对相斥型磁铁， 所述同轴安装的 三块圆形极板具有相同的投影面积且与同轴安装的二块所述磁铁的投影平面匹配， 一个与所述圆形极板中心 轴线同轴安装的环筒状磁性体在轴向高度上分别超出所述外侧圆形极板的外侧极面 0. 5~8毫米并形成二组上 下全对称的磁隙磁路， 所述环筒状磁性体的内周面与所述圆形极板的垂直周面间构成三个同轴等径的环形磁 隙，在所述环形磁隙内插入电磁线横截面积相等的同轴等径的三个线圈，所述线圈由 1层 /或 2层电磁线绕制 而成， 三个所述线圈间设有相应的间隔， 规定所述线圈的绕向及流经线圈的电流方向， 使三个所述线圈在同 一工作瞬间产生同一方向的电动力 F，
以所述圆形极板的中心轴线为垂直对称轴， 以所述中央极板的二分之一轴向高度的等分线 X— X轴线为 水平对称轴， 所述扬声器具有在几何形状和磁性能方面左右、 上下对称的二组对称磁路，
设定所述线圏电阻、 线圏卷幅、 线圈感量的绝对值、 绕线时的张力彼此相等， 以所述居中极板的二分之 一轴向高度的等分线 — X轴线为水平对称轴， 所述扬声器具有二组上下对称的线圈电路， 由此构成一种具 有电阻负载特性或近似于电阻负载特性的三磁隙三线圏内磁式全频带扬声器或带通式重低音扬声器。
8. 按照权利要求 7所述的具有音频数字接口的多媒体音响系统，其特征是：所述三磁隙三线圏内磁式扬 声器的三块所述极板和二块所述磁铁的轴心部位均设有投影面积相等的中央轴孔， 所述扬声器的使用非导磁 材料制成的所述托架的轴心部位也设有一个投影面积与之相等的中央轴孔 /或匹配的螺孔，， 一根非导磁材料 制成的紧固件穿过所述轴孔〃或匹配的螺孔并利用一块与所述极板匹配的非导磁材料制成的压樹所述极板 和所述磁铁施加足够的静压力并使它们粘结固定在所述扬声器的所述托架上。
9. 按照权利要求 1或权利要求 2或权利要求 3所述的具有音频数字接口的多媒体音响系统， 其特征是: 所述多磁隙多线圈扬声器是一个四磁隙四线圈扬声器 /或四个以上磁隙四个以上线圈的扬声器，所述扬声器具 有一 ±夬磁性材料制作的圆形极板， 在所述圆形极板的两侧平面上分别安装一 ±夬在厚度方向充磁极化的圆片状 磁铁 /或钕铁硼磁铁，所述磁铁在紧靠所述圆形极板的一侧具有相同的极性，所述磁铁的外侧平面上又分别安 装一 ±夬磁性材料制作的圆形极板……， 由此构成三对 /或三对以上相斥型磁铁， 所述同轴安装的四块 /或四块 以上圆形极板具有相同的投影面积且与同轴安装的三块 /三块以上所述磁铁的投影平面匹配，一个与所述圆形 极板中心轴线同轴安装的环筒状磁性体在轴向高度上分别超出所述外侧圆形极板的外侧极面 0. 5~8 毫米并 形 成二组上下全对称的磁隙磁路， 一个与所述相斥型磁铁同轴安装的环筒状磁性体的内周面与所述圆形极板的 垂直周面间构成四个 /或四个以上同轴等径的环形磁隙，在所述环形磁隙内插入电磁线横截面积相等的同轴等 径的四个 /或四个以上线圏， 所述线圈间设有相应的间隔， 规定所述线圏的绕向及流经线圏的电流方向， 使所 述线圈在同一工作瞬间产生同一方向的电动力 F，
以所述圆形极板的中心轴线为垂直对称轴， 以所述居中磁铁二分之一轴向高度的等分线 X ― X轴线为 水平对称轴， 所述扬声器具有在几何形状和磁性能方面左右、 上下对称的三组 /或三组以上对称磁路， 当所述线圏 609A及 609C从振膜外侧方向视入时具有顺时针绕向，所述线圏 609B及 609D必须具有反时 针绕向，反之亦然， 所述线圏 609A 的尾端 YA与所述线圈 609B的首端 XB串接，所述线圈 609B的尾端 YB与 所述线圈 609C的首端 C串接， 所述线圈 609C的尾端 YC与所述线圈 609D的首端 XD串接， 所述线圈 609D的 尾端 YD沿所述线圈骨架垂直引上与所述线圈 609A的首端 A构成所述换能器的一对信号输入端子，规定所述 线圈 609A与 609D及所述线圈 609B与 609C的电磁线横截面积、 线圈圈数、 线圈卷幅、 线圈电阻、 线圏电感 量的绝对值相等即 I 609A I + I 609B | = | 609D | + | 609C | 以及绕线时的张力彼此相等， 以所述居中磁铁的二分之一轴向高度的等分线 X ― X轴线为水平对称轴， 所述扬声器具有二组上下对称的 线圈电路，由此构成一种具有电阻负载特性或近似于电阻负载特性的四磁隙四线圈 /或更多磁隙和线圈的内磁 式全频带扬声器或带通式重低音扬声器。
10. 按照权利要求 9所述的具有音频数字接口的多媒体音响系统，其特征是：所述四磁隙四线圈 /或更多 磁隙和线圈的内磁式扬声器的四块 /或四块以上所述极板和三块 /或三块以上所述磁铁的轴心部位均设有投影 面积相等的中央轴孔， 所述扬声器的使用非导磁材料制成的所述托架的轴心部位也设有一个投影面积与之相 等的中央轴孔 /或匹配的螺孔， 一根非导磁材料制成的紧固件穿过所述轴孔 /或匹配的螺孔并利用一块与所述 极板匹配的非导磁材料制成的压板对所述极板和所述磁铁施加足够的静压力并使它们粘结固定在所述扬声器 的所述托架上。
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