TW201309049A - Driver for transducer with two magnets, two magnetic gaps and two coils - Google Patents

Abstract

A driver for a transducer with two magnets, two magnetic gaps and two coils, a driver magnetic circuit thereof consisting of a base (381), an inner magnetic core installed at a central axis portion of a round platform (3118) in the base, and an outer magnetic core surrounding the inner magnetic core and installed coaxially therewith. The outer magnetic core is fixed or bonded in position by a vertical positioning face and a horizontal positioning face inside a cylindrical wall of the base cooperatively. The inner and outer magnetic cores are joined into a whole respectively by one or more than one permanent magnets (302A, 302B) magnetised in the axial direction and upper and lower electrode plates (303A1, 303B1, 303A2, 303B2) which are coaxial and have the same diameter. The permanent magnets of the inner and outer magnetic cores have opposite polarity at the axial height. A horizontal symmetric axis Z-Z axis lies at half of the axial height of the electrode plate of the inner magnetic core, the electrode plate of the outer magnetic core and the coil reel matched therewith. A horizontal symmetric axis W-W axis lies at half of the axial height of the permanent magnets of the inner and outer magnetic cores. With the centre axis Y-Y axis of the inner and outer magnetic cores as the vertical symmetric axis and W-W axis as the horizontal symmetric axis, with the technical requirements for e.g. the wrapping direction of the coils (309A, 309B) specified at the same time, a highly efficient driver for an electro-acoustic or electro-mechanical transducer having a symmetric magnetic circuit and symmetric coil circuit while having a resistive or quasi-resistive loading property and capable of eliminating counter emf is thus constructed.

Description

Double magnet double magnetic gap double coil transducer driver

The invention relates to a transducer, in particular to a driver of a double magnet double magnetic gap double coil transducer having a symmetric magnetic circuit and a symmetric coil circuit, and belongs to the field of electrical electroacoustic transducers and electromechanical transducers.

A driver for a dual magnetic gap double coil transducer is a prior art. For example, CN87200654, CN94246701.9, CN95101020.4, CN97246403.4, CN00806413.X, JP6233380, JP0951597, US5748760, etc. disclose several technical solutions for a driver involving a double magnetic gap double coil speaker. However, it is necessary to refer to the inventors' PCT/CN00/00241, US10/913018, US6795564, JP4399139, CN200510091936.0, CN200710181973 for the technical solution of obtaining the resistance load characteristic or the approximate resistance load characteristic and eliminating the counter back electromotive force of the speaker. X, CN200810065384.X, CN200810169693.1, CN200980102868.X, PCT/CN2008/072668, PCT/CN2009/070507 and other series of technical solutions.

The dual magnet double magnetic gap double coil transducer magnetic circuit is also a prior art. For example, China National Defense Industry Press published the first page of the "Practical Speaker Craft Manual" on January 344, "Figure 8.77", which discloses an "inside and outside series magnetic circuit." However, the book does not disclose the time of the "inside and outside series magnetic circuit" literature, nor does it provide a complete and clear disclosure of the overall structure and implementation of the magnetic circuit. Not even disclose its The role and relationship of the coil circuit. Therefore, it is not an open new technology solution.

The object of the present invention is to overcome the deficiencies of the prior art, and to construct a symmetrical magnetic circuit and a symmetrical coil circuit, such as PCT/CN00/00241, CN200610020317.7, PCT/CN2008/072668, CN201010278725.9, which have been proposed by the inventors. The double magnetic gap double coil outer magnetic transducer technical solution, and the double magnetic gap composed of a symmetric magnetic circuit and a symmetrical coil circuit, such as US10/913018, CN200510091936.0, PCT/CN2009/070507, which the inventors have proposed Two sets of separately mounted symmetric magnetic circuits and symmetrical coil circuits of a transducer having a resistive load characteristic or a resistive load characteristic in a dual coil internal magnetic transducer technique, which are combined and further updated to have symmetry Double magnet double magnetic gap double coil transducer driver for magnetic circuit and symmetrical coil circuit. The enormous energy provided by the dual magnets allows the transducer driver of the present invention to achieve a strong axial drive while eliminating the inductance of the transducer driver and the induced back electromotive force.

The object of the present invention is achieved as follows: a driver for a dual magnet double magnetic gap double coil transducer includes a magnetic circuit and a face cover and a base integrally coupled thereto, and a radially outwardly disposed concave outer cavity is disposed inside the cover a groove, a smooth surface of the throat plug is fixedly attached to the inside of the cover, the peripheral portion of which forms an air outlet matching the radial air outlet groove, and a diaphragm matching the throat plug, which is provided with a symmetrical wrinkle and a circle Annular plane, a circular positioning washer fixes the circular plane of the diaphragm on the circular platform on the inner side of the cover while being vertically arranged by the vertical inner wall of the cover Positioning the flange, an inner core mounted on the axial center of the convex platform surface in the base, and a coaxial core between the mutually matching poles of an outer core surrounded by the inner core and coaxially mounted Two annular magnetic gaps of the diameter, a coil bobbin inserted into the annular magnetic gap, on which the electromagnetic wires insulated from each other are wound in parallel and constitute a coil, and the top end portion of the bobbin is bonded and fixed to the circular groove of the diaphragm, and the coil is passed through the coil The piston movement of the skeleton drives the diaphragm to vibrate, and the cover and the base are made of a non-magnetic material, and the cover and the base are connected as a whole by a plurality of non-magnetic fasteners arranged uniformly; Two circular plate-shaped upper plates and lower plates coaxially mounted and provided with central shaft holes, the plates having the same thickness and projected area and matched with the permanent magnets, and an axial magnetization provided with a central shaft hole The permanent magnet bonds the upper and lower plates into an inner core of the magnetic circuit; two coaxially mounted annular upper plates and lower plates, the two plates having the same Thickness and projected area and The permanent magnets are matched, and one or more than one equal thickness uniform axially magnetized permanent magnets are coupled to fix the upper and lower plates to form an outer core of the magnetic circuit; a non-magnetic material is formed The open cylindrical base has a circular platform at its axial center, and the axial center of the circular platform is provided with a through hole matching the inner core plate and the permanent magnet shaft hole. Or a screw hole, the circular platform has a neat and rough leveling surface and a neatly smooth vertical outer circular surface, the outer side of the vertical outer circular surface is provided with an annular groove, and the two sides of the annular groove are respectively provided with a width An annular overflow tank of 1-5 mm and a depth of 1-5 mm, the groove bottom of the annular groove is provided with two or more uniformly arranged penetrations a venting hole, the outer side of the annular groove forming a neat and rough annular platform surface of the base, the outer side of the annular platform surface being a cylindrical cylindrical wall of the base, and the inner circumferential surface of the cylindrical tubular wall Corresponding axial height or its top end portion is provided with a smooth and tidy vertical positioning surface and a horizontal positioning surface, and a plurality of uniformly arranged screw holes are arranged on the top horizontal surface of the cylindrical barrel wall; a fastener is passed through the shaft hole of the magnetic core in the magnetic circuit that has been pre-charged and fixed to the axial center portion of the circular land surface of the base, which has been pre-charged The outer magnetic core of the magnetic circuit is coaxially embedded and/or coupled to the annular platform surface of the base and is fixedly and/or adhesively positioned by the vertical positioning surface of the cylindrical wall of the base and the horizontal positioning surface; An outer magnetic core encloses the inner core, the permanent magnet of the outer core and the permanent magnet of the inner core have opposite polarities in an axial height; the core of the magnetic circuit Upper and lower plates and an upper plate of the outer magnetic core of the magnetic circuit Two coaxial equal-diameter annular magnetic gaps are formed between the vertical peripheral surfaces of the lower plate, and two coils of coaxial equal diameter are inserted into the annular magnetic gap to define the direction of the winding of the two coils and the current flowing through the coil. Equiring the coil to generate electric power F in the same direction at the same working moment; the upper plate of the magnetic core in the magnetic circuit and the upper plate of the outer core and one-half of the matching coil of the coil The bisector of the axial height Z---Z axis is the same level axis, the lower plate of the inner core and the lower plate of the outer core and the matching coil of the coil are two-half The bisector Z---Z axis of an axial height is also the same level axis, with the inner core permanent magnet and the bisector of the one-half axial height of the outer core permanent magnet W- The W axis is a horizontal symmetry axis, and the inner core and the central axis of the outer core The line Y---Y axis is a vertical symmetry axis, and the double-magnet double-magnetic gap double-coil transducer has two sets of symmetric magnetic circuits symmetrically and bilaterally symmetric in terms of geometry and magnetic properties, as well as in geometry and electricity. Two sets of symmetrical coil circuits with upper and lower symmetry and bilateral symmetry in terms of performance, the electromagnetic wire cross-sectional area, the number of coil turns, the coil wrap, the coil resistance, the absolute value of the coil inductance, and the tension at the time of winding of the two coils Equivalent; the base annular groove is provided with a discharge magnetic circuit and thermal energy emitted by the coil circuit and the penetrating pores uniformly arranged to reduce the air damping of the transducer vibration system, when the base geometry and structural strength When permitted, each of the penetrating vents has as large a projected area as possible and equal to each other, and a center or a center line of the penetrating vent is disposed on a projection plane of the bobbin/or the coaxial equal-diameter coil The left and right symmetrical state of the coil circuit is always maintained on the circumference line and when the transducer vibration system vibrates up and down; thereby, the double magnet double magnetic gap double coil transducer The inductance of the driver and the back electromotive force induced during the reciprocating motion cancel each other out due to a phase angle of 180 degrees. The double magnet double magnetic gap double coil transducer is a resistive load characteristic or similar to a resistor. Load characteristics and ultra-efficient actuators for electroacoustic transducers.

A driver for a dual magnet double magnetic gap double coil transducer, the permanent magnet being a neodymium iron boron magnet/or a rare earth permanent magnet.

A driver for a dual magnet double magnetic gap double coil transducer in which magnetic fluid is not allowed to be implanted. The driver of the double magnet double magnetic gap double coil transducer comprises a magnetic circuit and a frame and a base integrated therewith, an inner core mounted on the axial center of the convex platform surface of the base, and the inner core is surrounded Two annular magnetic gaps of coaxial equal diameter are formed between the perpendicular peripheral surfaces of the mutually matching plates of an outer magnetic core mounted coaxially, and a coil bobbin inserted into the annular magnetic gap is wound on the electromagnetic wires insulated from each other in parallel Forming a coil, a diaphragm and a planar sounding board coupled with the bobbin and the at least one elastic wave, driving the diaphragm or the planar sounding board to vibrate by the piston movement of the bobbin, or detecting the sound through the diaphragm The sound pressure changes and a corresponding audio signal is sensed in the coil, the frame is a frame made of a non-magnetic material, or the frame and the base are fused into a monolithic structure; the two are coaxially mounted and provided a disc-shaped upper plate and a lower plate of the central shaft hole, the plates having the same thickness and projected area and matched with the permanent magnet, and an axially magnetized permanent magnet provided with the central shaft hole to be the upper The plate and the lower plate are coupled to form an inner core of the magnetic circuit; two coaxially mounted annular upper plates and lower plates, the two plates having the same thickness and projected area and The magnets are matched, and one or more than one equal thickness uniform axially magnetized permanent magnets bond the upper and lower plates into an outer core of the magnetic circuit; a non-magnetic material The open cylindrical base has a circular platform at its axial center, and the axial center of the circular platform is provided with a through hole matching the inner core plate and the permanent magnet shaft hole. a screw hole having a neat and rough leveling surface and a neatly smooth vertical outer surface, wherein the outer side of the vertical outer circular surface is provided with an annular groove, and the two sides of the annular groove are respectively provided with a width An annular overflow tank having a height of 1-5 mm and a depth of 1-5 mm, wherein the groove bottom of the annular groove is provided with two or more uniformly arranged through holes, and the outer side of the annular groove constitutes the neatness of the base Rough ring a platform surface, the outer side of the annular platform surface is a cylindrical cylinder wall of the base, and the corresponding axial height of the inner circumferential surface of the cylindrical cylinder wall or a top portion thereof is provided with a smooth and tidy vertical positioning surface and a leveling surface, the top surface of the cylindrical wall is further provided with a plurality of evenly arranged screw holes; a fastener made of a non-magnetic material passes through the magnetic circuit which has been pre-charged The shaft hole of the magnetic core is fixedly coupled to the axial center portion of the circular platform surface of the base, and the outer magnetic core of the magnetic circuit that has been pre-charged is coaxially embedded and/or coupled to the base The annular platform surface is fixedly and/or adhesively positioned by the vertical positioning surface of the cylindrical wall of the base and the horizontal positioning surface; the magnetic outer core surrounds the inner core, The permanent magnet of the outer core and the permanent magnet of the inner core have opposite polarities in the axial height; the upper and lower plates of the magnetic core in the magnetic circuit and the outer core of the magnetic circuit Two coaxial equal-diameter annular magnetic gaps are formed between the vertical peripheral surfaces of the plates and the lower plates. Inserting two coils of coaxial equal diameter into the annular magnetic gap, and arranging the directions of the two coils and the current flowing through the coil, so that the coils generate electric power F in the same direction at the same working moment; The upper plate of the magnetic core and the upper plate of the outer core and the bisector Z---Z axis of the one-half axial height of the matching coil web are the same level axis, The lower plate of the inner core and the lower plate of the outer core and the bisector Z---Z axis of the one-half axial height of the matching coil web are also the same level axis, The inner core permanent magnet and the bisector of the one-half axial height of the outer core permanent magnet W---W axis are a horizontal symmetry axis, and the inner core and the outer core The central axis Y---Y axis is a vertical symmetry axis, and the double-magnet double-magnetic gap double-coil transducer has upper and lower symmetry and bilateral symmetry in terms of geometric shape and magnetic properties. a set of symmetric magnetic circuits and two sets of symmetric coil circuits symmetrically and bilaterally symmetric in terms of geometric shape and electrical properties, magnetic cross-sectional areas of the two coils, number of coil turns, coil coils, coil resistance, and coil inductance The absolute value of the winding and the tension at the time of winding are equal to each other; the annular groove of the base is provided with a discharge magnetic circuit and thermal energy emitted by the coil circuit, and the through-holes uniformly arranged to reduce the air damping of the transducer vibration system When the base geometry and structural strength allow, each of the through holes has as large a projected area as possible and are equal to each other, and a center or a center line of the through holes is disposed in the bobbin and/or a circumferential line of the projection plane of the coaxial equal-diameter coil, and maintaining the left-right symmetrical state of the coil circuit while the transducer vibration system vibrates up and down; thereby, the double magnet double magnetic gap double line The inductance of the loop transducer and the back electromotive force induced during the reciprocating motion cancel each other by having a phase angle of 180 degrees, and the double magnet double magnetic gap double coil is exchanged. The igniter is a driver with an electroacoustic and/or electromechanical transducer with resistive load characteristics or approximately resistive load characteristics and ultra high efficiency.

A driver for a dual magnet double magnetic gap double coil transducer, the permanent magnet being a neodymium iron boron magnet/or a rare earth permanent magnet.

A driver for a dual magnet double magnetic gap double coil transducer in which magnetic fluid is not allowed to be implanted.

The invention has the beneficial effects that the electroacoustic transducer/electromechanical transducer with good heat dissipation function, low distortion and super high efficiency can be prepared by using the huge axial driving force provided by the driver of the invention. For example, one of the conventional drives can be replaced by one of the inventive drives, and cooling is no longer used in the magnetic gap. High-efficiency and energy-saving folding horn loudspeaker with magnetic fluid, input sound power of 250W, frequency response range of 350Hz--5000Hz, maximum output sound pressure of 139dB@1m. They operate reliably in harsh climates from -45 ° C to +50 ° C.

Fig. 1 discloses a longitudinal sectional view of a prior art embodiment 1 and a modification thereof. This is a partial cross-sectional view of the magnetic core of the embodiment of Fig. 6 (including the coil 109 and the bobbin 107) disclosed by the inventors of the present invention, which is disclosed in US Patent Application No. 10/913,018, the Chinese Patent No. CN200510091936.0, and PCT/CN2008/072668. The upper plate 103A and the lower plate 103B are two disk-shaped flat plates of equal thickness and equal projection area, coaxially mounted, and a matching neodymium iron boron magnet 102 is bonded to the upper plate 103A and the lower plate 103B. Between the ring-shaped yokes 113 is disposed on the axial center portion of the magnetic core. At this time, the inner circumferential surface of the element 113 and the vertical circumferential surfaces of the elements 103A and 103B constitute two coaxial magnetic gaps 110A of equal diameter and 110B, a bobbin 107 and two coaxially mounted coils 109A and 109B are inserted in the annular magnetic gap, the coil 109A is set to clockwise, and the coil 109B is counterclockwise (or vice versa). It is specified that the electromagnetic wire cross-sectional area of the coil 109A and the coil 109B, the number of coil turns, the coil volume, the coil resistance, the absolute value of the coil inductance, and the tension at the time of winding are equal to each other, and are connected in series to form a coil such as PCT/CN2008/ 072668 is shown in FIG. 12, and the bisector Z--Z axis constituting the upper plate 103A, the lower plate 103B, and the one-half axial height of the coil web is a horizontal symmetry axis, and the permanent magnet 102 is The bisector of the one-half axial height X---X axis is the horizontal axis of symmetry, with element 103A, element 102 and element The Y---Y axis of the piece 103B is a set of two vertical and symmetrical magnetic circuits in terms of geometry and magnetic properties, and a coil circuit that is vertically and horizontally symmetric in terms of geometry and electrical properties. Thus, the absolute values of the inductances of the two coils 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. This embodiment is a set of double magnetic gap double coil internal magnetic transducer drivers having resistive load characteristics or approximately resistive load characteristics and having ultra high sensitivity and high fidelity quality. For a more detailed description, please refer to the description of the descriptions of PCT/CN2008/072668, FIG. 6, FIG. 9 to FIG. 12, FIG. 20, FIG. 21 and CN200510091936.0 and US2005/0099255A1 which have been disclosed by the present inventors and are not repeated.

It is quite obvious that in order to enable the transducer to obtain the characteristics of the symmetric magnetic circuit and the symmetrical coil circuit as described in the prior art of PCT/CN2008/072668 during dynamic operation, the present invention proposes a new improvement to the above-mentioned prior art: The bisector axis Z---Z axis of the upper axial plate 103A and the lower plate 103B and the half-axis axial height of the coil 109A and the coil 109B are the same level symmetry axis, thereby making the embodiment of the present invention The upper and lower symmetrical characteristics of the optimal magnetic circuit and coil circuit can be obtained.

Fig. 2 discloses a longitudinal sectional view of a prior art embodiment 2 and a modification thereof.

This is a cross-sectional view of a magnetic core portion (including the coil 109 and the bobbin 107) of the embodiment of Fig. 5 disclosed by the inventors of the present invention as disclosed in PCT/CN2008/072668. The upper plate 203A and the lower plate 203B are two circular plates of equal thickness and equal projection area, coaxially mounted, and a matching neodymium iron boron magnet 202 is bonded to the upper plate 203A and the lower plate 203B. Between the ring-shaped yokes 213 is placed on the axial center of the above-mentioned magnetic core, at this time, the element The outer peripheral surface of the member 213 and the vertical peripheral surfaces of the members 203A and 203B constitute two coaxial equal-diameter annular magnetic gaps 210A and 210B, in which the bobbin 207 and the coaxially mounted two coils 209A and 209B are inserted. The set coil 209A is wound clockwise, and the coil 209B is wound counterclockwise (or vice versa). It is specified that the electromagnetic wire cross-sectional area of the coil 209A and the coil 209B, the number of coil turns, the coil volume, the coil resistance, the absolute value of the coil inductance, and the tension at the time of winding are equal to each other, and are connected in series to form a coil such as PCT/CN2008/ 072668 shown in FIG. 12, thereby constituting the upper plate 203A, the lower plate 203B, and the coil axial one-half axial height bisector Z---Z axis is a horizontal symmetry axis, with the permanent magnet 202 The bisector of the one-half axial height X---X axis is the horizontal axis of symmetry, the two groups of the vertical axis of symmetry of the Y---Y axis of element 203A, element 202 and element 203B are in geometry and Magnetic circuit with upper and lower sides and symmetrical magnetic properties, and coil circuits that are vertically and horizontally symmetric in terms of geometric shape and electrical performance. Thus, the absolute values of the inductances of the two coils 209A and 209B 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. This embodiment is a set of dual magnetic gap double coil outer magnetic transducer drivers having resistive load characteristics or approximately resistive load characteristics and having ultra high sensitivity and high fidelity quality. For a detailed description, please refer to PCT/CN2008/072668, FIG. 5, FIG. 9 to FIG. 12, FIG. 20, FIG. 21, and the patent specifications of PCT/CN00/00241, US6795564, CN200610020317.7, etc., and the present invention will not be repeatedly described.

It is quite obvious that in order to enable the transducer to obtain the characteristics of the symmetric magnetic circuit and the symmetrical coil circuit as described in the prior art of PCT/CN2008/072668 during dynamic operation, the present invention proposes a new development: Upper pole The plate 103A and the lower plate 103B and the bisector Z---Z axis of the one-half axial height of the coil 109A and the coil 109B are of the same level of symmetry axis, so that the embodiment of the invention can obtain the best The upper and lower symmetrical characteristics of the magnetic circuit and the coil circuit.

Fig. 3 shows a longitudinal sectional assembly view of a prior art embodiment 3.

This is a longitudinal section assembly view of a horn loudspeaker driver disclosed in US 5,987,148 (Driver for A Horn Radiator). The gist of the invention is that a gap 413 is provided between the magnet 42 and the vertical inner wall surface of the yoke 41 (i.e., U-iron), and two opposite-direction penetration holes 415 are formed in the vertical wall surface of the yoke 41. Another gap 421 is formed between the yoke 41 and the hollow base 32. Thereby, the air in the head space 443 is re-introduced into the gap 413 via the voice coil 442 and the matching magnetic gap 432 by the reciprocating vibration of the diaphragm, and finally reaches the gap 421 through the air hole 415 and forms a convection heat dissipation inside the driver. Airway, thus achieving the purpose of the Driver for 8 A Horn Radiator.

However, since the penetration holes are formed in the vertical inner wall of the yoke 41, when the diameters of the two holes are large, the magnetic resistance of the yoke 41 is increased, thereby lowering the Br value of the magnetic gap 432 where the voice coil 442 is located. The output sound pressure of the horn speaker will drop. On the contrary, when the diameter of the two holes is small, the influence on the Br value of the driver magnetic gap 432 is not large, and the ventilation and heat dissipation effect of the convection air passage of the invention is not obvious. Therefore, it fully demonstrates a very contradictory aspect of the US 5987148 patent airflow cooling solution.

Fig. 4 is a view showing an assembly of a longitudinal section of a first embodiment of the present invention.

Two circular plate-shaped upper plates 303A1 and lower plates 303B1 coaxially mounted and provided with central shaft holes, having the same thickness and projected area and with NdFeB 302A matches each other. The axially magnetized permanent magnet 302A bonds the upper plate 303A1 and the lower plate 303B1 to an inner core of the magnetic circuit. An open cylindrical base 381 made of aluminum alloy has a circular platform 3118 at its axial center, and the circular platform has a neatly rough circular platform surface 31180 and a neatly smooth vertical outer surface, which is vertically An annular groove 363 is disposed on the outer side of the circular surface, and two or more uniformly disposed through holes 382 are disposed in the groove bottom of the annular groove 363. The outer side of the annular groove 363 constitutes an open cylindrical wall of the base 381. The corresponding axial height of the inner peripheral surface is provided with a smooth and aligning leveling surface 3810 and a vertical positioning surface 3820. The cylindrical surface of the cylindrical barrel wall of the base 381 is further provided with a plurality of evenly arranged screw holes 321 on the horizontal surface.

An adhesive is applied on the outer circular flat surface 31180 of the circular platform 3118, and the inner magnetic core that has been saturated by the magnetizing machine is bonded and positioned on the central axis of the circular flat surface 31180 by a special fixture. . At this time, a non-magnetic flux fastener 3710 should be inserted into the shaft holes of the upper plate 303A1, the neodymium magnet 302A and the lower plate 303B1 immediately before the adhesive is cured, while being embedded in the recessed hole 351 of the base. A non-magnetic nut 37101 secures the inner core to the axial portion of the circular land surface of the base 381. The two coaxially mounted annular upper plates 303A2 and 303B2 have the same thickness and projected area and are matched with the NdFeB 302B. It may be an annular neodymium magnet or a plurality of equal thicknesses. A uniformly axially magnetized neodymium magnet thereby couples the upper plate 303A2 and the lower plate 303B2 to form an outer core of the magnetic circuit. Then, the inner core binder is sufficiently bonded and cured. The outer core is coaxially mounted to the periphery of the inner core using a special fixture. At this time, the lower plate 303B2 of the outer core is level-positioned and fixed by the annular land surface 3810 of the open cylinder base 381. External core The permanent magnet 302B and the permanent magnet 302A of the inner core have opposite polarities in the axial height as shown in FIGS. 4 and 5: for example, the permanent magnet 302A near the upper plate 303A1 has an N polarity, close to the upper plate. The permanent magnet 302B of 303A2 has opposite S poles. In order to maximize the axial linear working stroke and the maximum range of dynamic symmetry of the transducer, the upper plate 303A1 of the inner core and the upper plate 303A2 of the outer core and the matching coil 309A are two-pointed. One of the axial heights of the bisector Z---Z axis is the same level bisector or level axis. The lower axis Z---Z axis of the lower axial height of the second lower plate 303B1 of the inner core and the lower plate 303B2 of the outer core and the matching coil 309B are also the same level aliquot Line or level axis.

As can be seen from Fig. 4, between the vertical peripheral surface of the upper electrode plate 303A1 of the inner magnetic core and the upper electrode plate 303A2 of the outer magnetic core and between the vertical peripheral surface of the lower electrode plate 303B1 of the inner magnetic core and the lower electrode plate 303B2 of the outer magnetic core Two coaxial equal-diameter annular magnetic gaps 310A and 310B are formed, and a coaxial equal-diameter bobbin 307 is inserted into the two annular magnetic gaps, and two coils 309A and 309B are wound thereon, and the coil 309A is defined to be clockwisely wound. And the coil 309B is wound counterclockwise and the two coils are connected in series to form a coil 309 of the transducer. At this time, the coils 309A and 309B generate the electric power F in the same direction at the same working moment. The electromagnetic wire cross-sectional area, the number of coil turns, the coil coil, the coil resistance, the absolute value of the coil inductance, and the tension at the winding are defined to be equal to each other, and the inner core permanent magnet 302A and the outer core are defined by the two coils 309A and 309B. The bisector W---W axis of the one-half axial height of the permanent magnet 302B is a horizontal symmetry axis, and the center axis Y---Y axis of the inner core and the outer core is a vertical symmetry axis, and the double Magnet double magnetic gap double coil transducer driver with geometry and magnetic properties Two sets of magnetic circuits with bilateral symmetry and upper and lower symmetry, and two sets of coil circuits that are bilaterally symmetrical and vertically symmetrical in terms of geometric shape and electrical performance. Thus, the inductance of the two sets of coils of the double magnet double magnetic gap double coil driver and the back electromotive force induced during the reciprocating motion cancel each other by having a phase angle of 180 degrees, the double magnet double magnetic gap double line The loop transducer driver is a driver of an electroacoustic transducer or electromechanical transducer with resistive load characteristics or approximately resistive load characteristics with ultra high efficiency and low distortion quality.

In fact, it can be seen from Fig. 4 that the first embodiment provides a driver for a folding horn loudspeaker. The maximum input sound power of this driver is often 20,000-300W. Therefore, it is necessary to fully consider the way in which a large amount of thermal energy formed by the magnetic circuit and the coil circuit during operation is discharged from the inside of the transducer driver in time.

To this end, the present invention requires that: first, no magnetic fluid cooling coil is allowed in the annular magnetic gap; second, at the bottom of the groove of the annular groove facing the annular magnetic gap, when the base 381 When the geometrical size and structural strength allow, there are also a plurality of evenly arranged through-holes 382 arranged, and the projected areas of each of the air holes 382 are equal to each other; third, the center or center line of the penetrating holes Both are disposed on a circumference line of a projection plane of the bobbin/or the coaxial equal-diameter coil. Therefore, when the diaphragm 306 vibrates up and down, the large amount of thermal energy generated by the transducer driver magnetic circuit and the coil circuit will pass through: the diaphragm lower cavity annular magnetic gap 310 and the coil 309 annular groove 363 penetrate the air hole 382 outside the driver. space.

Finally, it should be particularly pointed out that the above technical solution of the present invention not only improves the ventilation and heat dissipation effect of the transducer driver and the power pressure phenomenon of the speaker, but also improves the frequency transient response characteristic of the speaker, so that the transducer is vibrated. The left and right symmetrical state of the coil circuit is always maintained when the moving system vibrates up and down, thereby significantly improving the distortion of the speaker.

Needless to say, the mounting, functioning, and configuration of the present embodiment relating to the element 1, the element 2, the element 3, the element 5, the element 6, the element 9, the element 19, the element 22, and the element 306 are all well known to those skilled in the art. Repeat it again.

Fig. 5 is a longitudinal sectional view showing a separate element of the first embodiment of the present invention. It can be understood and verified against the description of Figure 4.

Figure 6 is a rear plan view showing Embodiment 1 of the present invention.

As can be seen from this figure, the penetrating air holes 382 are 28 uniformly arranged circular holes. The projected areas of each hole are equal to each other. The center of each hole falls on a circumference line equal to the outer diameter of the bobbin.

Figure 7 discloses a longitudinal cross-sectional view of a folding horn loudspeaker using a drive of the present invention. Since it is an existing technology, please refer to [the main component symbol description] of the present specification, and will not be described again.

Fig. 8 is a longitudinal sectional assembly view showing a second embodiment of the present invention.

This is a typical embodiment of a bass or subwoofer. It is also a modification of Embodiment 1 of the present invention, which is suitable for use in large-caliber and high-power electroacoustic transducers. At this time, the axial center portion of the inner convex circular platform 3118 of the base 381 is provided with a screw hole or a through hole, and the inner core upper plate 303A1, the permanent magnet 302A and the lower plate 303B1 are respectively provided with a shaft hole. After the adhesive is applied to the outer horizontal surface 31180 of the inner convex platform 3118, a non-magnetic material fastener such as a stainless steel bolt 3710 of 1Cr18Ni9Ti is inserted into the shaft hole of the inner core and bonded and fastened to the shaft of the inner convex platform 3118. Heart part. In addition, other structures and working principles of this embodiment, please refer to the description of FIG. 4 to FIG. Ming will not repeat the description.

103A-303A/103B-303B‧‧‧Upper plate/lower plate

101-301‧‧‧Frame

102-302‧‧‧ permanent magnet

105-305‧‧‧Dust cap

106-306‧‧‧Diaphragm/flat sound board

107-307‧‧‧ coil bobbin

109A-309A/109B-309B‧‧‧ coil

110A-310BL‧‧‧Ring magnetic gap

113-313‧‧‧ Ring-shaped yoke

141-341L‧‧‧Bouncing waves

181-381‧‧‧Base

182-382‧‧‧ penetrating pores

99-399‧‧1 suspension

163-363‧‧‧ annular groove

1118-3118‧‧‧round platform

11180-31180‧‧‧round platform

1810-3810‧‧‧ annular platform surface

1820-3820‧‧‧Vertical positioning surface

1710-3710‧‧‧Non-magnetic fasteners

172-372‧‧‧non-magnetic gasket

17101-37101‧‧‧Non-magnetic nuts

152-352‧‧‧heat fins

1013-3013‧‧‧Non-magnetic screw

1811-3811‧‧‧Frame flange

1871-3871‧‧‧Open cylindrical wall

151-351‧‧‧ recessed hole

121-321‧‧‧ screw hole

171-371‧‧‧ overflow tank

1‧‧‧ face cover

2‧‧‧non-magnetic fasteners

3‧‧‧ throat plug

5‧‧‧Sealing washer

6‧‧‧Weaving leads

9‧‧‧Positioning washers

19‧‧‧Flexible gasket

22‧‧‧External thread outlet

901‧‧‧Drive unit

902‧‧‧Aluminum flange

903‧‧‧Non-magnetic fasteners

904‧‧‧ medium tube bracket

905‧‧‧Blowpipe

906‧‧‧中筒

907‧‧‧ horn

Fig. 1 discloses a longitudinal sectional view of a prior art embodiment 1 and a modification thereof.

Fig. 2 discloses a longitudinal sectional view of a prior art embodiment 2 and a modification thereof.

Fig. 3 shows a longitudinal sectional assembly view of a prior art embodiment 3.

Fig. 4 is a view showing an assembly of a longitudinal section of a first embodiment of the present invention.

Fig. 5 is a longitudinal sectional view showing a separate element of the first embodiment of the present invention.

Figure 6 is a rear plan view showing Embodiment 1 of the present invention.

Figure 7 discloses a longitudinal cross-sectional view of a folding horn loudspeaker using a drive of the present invention.

Fig. 8 is a longitudinal sectional assembly view showing a second embodiment of the present invention.

1‧‧‧ face cover

2‧‧‧non-magnetic fasteners

3‧‧‧ throat plug

6‧‧‧Weaving leads

9‧‧‧Positioning washers

19‧‧‧Flexible gasket

22‧‧‧External thread outlet

303A1, 303A2‧‧‧ upper plate

303B1, 303B2‧‧‧ lower plate

301‧‧‧Frame

302A, 302B‧‧‧ permanent magnet

306‧‧‧Diaphragm/flat sound board

307‧‧‧ coil bobbin

309A/309B‧‧‧ coil

310B‧‧‧Ring magnetic gap

351‧‧‧ recessed hole

381‧‧‧Base

382‧‧‧ penetrating pores

363‧‧‧ annular groove

3118‧‧‧round platform

3710‧‧‧Stainless steel bolts

37101‧‧‧Non-magnetic nuts

352‧‧‧heating fins

3871‧‧‧Open cylindrical wall

901‧‧‧Drive unit

Claims (6)

The utility model relates to a driver of a double magnet double magnetic gap double coil transducer, comprising a magnetic circuit and a surface cover and a base integrally coupled thereto, a radially arranged air outlet groove uniformly arranged on the inner side of the cover, and a smooth surface plug The joint is fixed on the inner side of the cover, and the peripheral portion thereof constitutes an air outlet matching the radial air outlet groove, and a diaphragm matched with the throat plug is provided with a symmetrical wrinkle and a circular plane, a circular ring The positioning washer fixes the annular plane of the diaphragm on the circular platform on the inner side of the cover while being positioned by the vertically positioned flange uniformly arranged on the vertical inner wall of the cover, and is mounted on the axial portion of the convex platform surface of the base. The inner core, and the inner peripheral surface of the mutually matching plates of the outer core surrounded by the inner core and the coaxial core, constitute two annular magnetic gaps of coaxial equal diameter, and a coil bobbin inserted into the annular magnetic gap, The electromagnetic wires insulated from each other are wound in parallel and constitute a coil, and the top end portion of the coil bobbin is bonded and fixed to the annular groove of the diaphragm, and the vibration of the diaphragm is caused by the piston movement of the bobbin, and the characteristic is: a. The cover and the base are made of a non-magnetic material, and the cover and the base are integrally connected by a plurality of non-magnetic fasteners arranged uniformly; b. two coaxially mounted and provided with a central shaft hole a disk-shaped upper plate and a lower plate, the plates having the same thickness and projected area and matching the permanent magnets, an axially magnetized permanent magnet provided with a central shaft hole to the upper plate and The lower plate is bonded to form an inner core of the magnetic circuit; c. two coaxially mounted annular upper plates and lower plates, the two plates having the same thickness and projected area and The magnets are matched, and one or more than one equal thickness uniform axially magnetized permanent magnets are coupled to the upper and lower plates to form an outer core of the magnetic circuit; d. an open cylindrical base composed of a non-magnetic material, the shaft center portion is provided with a circular platform, and the axial center portion of the circular platform is provided with an inner core plate and a permanent magnet a shaft hole matching penetration hole or a screw hole, the circular platform has a neat and rough level table and a neatly smooth vertical outer surface, and an outer side of the vertical outer surface is provided with an annular groove, the annular concave The two sides of the groove are respectively provided with annular overflow grooves having a width of 1-5 mm and a depth of 1-5 mm, and the groove bottom of the annular groove is provided with two or more uniformly arranged through holes, the annular concave The outer side of the groove constitutes a neat and rough annular platform surface of the base, the outer side of the annular platform surface is a cylindrical cylindrical wall of the base, the corresponding axial height of the inner circumferential surface of the cylindrical tubular wall or The top end portion is provided with a smooth and tidy vertical positioning surface and a horizontal positioning surface, and the cylindrical horizontal wall has a plurality of evenly arranged screw holes on the top horizontal surface; e. a fastener made of non-magnetic material Passing through the shaft hole of the magnetic core in the magnetic circuit that has been pre-charged and The knot is fixed on the axial center portion of the circular platform surface of the base, and the outer magnetic core of the magnetic circuit that has been pre-saturated is coaxially embedded and/or coupled to the annular platform surface of the base and is The vertical positioning surface of the cylindrical wall of the base and the horizontal positioning surface are fixedly fixed or adhesively positioned; f. the outer magnetic core of the magnetic circuit encloses the inner core, and the permanent magnet of the outer core The permanent magnets of the inner core have opposite polarities in the axial height; g. the upper and lower plates of the inner core of the magnetic circuit and the upper and lower plates of the magnetic outer core Two coaxial equal-diameter annular magnetic gaps are formed between the vertical circumferential surfaces of the plates, and two coils of coaxial equal diameter are inserted into the annular magnetic gap to define the direction of the two coils and the current flowing through the coils. The coils are in the same The working moment generates the electric power F in the same direction; h. the upper plate of the magnetic core in the magnetic circuit and the upper plate of the outer core and the matching axial coil height of one-half of the coil The bisector Z---Z axis is the same level axis, the lower plate of the inner core and the lower plate of the outer core and the matching one-half axial height of the coil web The bisector Z---Z axis is also the same level axis, with the inner core permanent magnet and the bisector of the one-half axial height of the outer core permanent magnet W---W axis a horizontal axis of symmetry, wherein the inner core and the central axis Y---Y axis of the outer core are vertical symmetry axes, the double magnet double magnetic gap double coil transducer has geometry and magnetic properties Two sets of symmetric magnetic circuits with upper and lower symmetry and bilateral symmetry, and two sets of symmetric coil circuits with upper and lower symmetry and bilateral symmetry in terms of geometric shape and electrical performance, and cross-sectional areas of electromagnetic wires, coil turns, and coils of the two coils The width of the coil, the coil resistance, the inductance of the coil, and the tension at the time of winding are equal to each other; i. the annular groove on the base Having a discharge magnetic circuit and thermal energy emitted by the coil circuit and the penetrating air holes uniformly arranged to reduce air damping of the transducer vibration system, each of the penetrations when the base geometry and structural strength allow The air holes have as large a projected area as possible and are equal to each other, and a center or a center line of the through holes is disposed on a circumference line of a projection plane of the bobbin/or the coaxial equal-diameter coil, and the transducing The vibration system of the device always maintains the left and right symmetrical state of the coil circuit when vibrating up and down; thereby, the inductance of the driver of the double magnet double magnetic gap double coil transducer and its induction during reciprocating motion The back electromotive force cancels each other by having a phase angle of 180 degrees, and the double magnet double magnetic gap double coil transducer is a A driver for an electroacoustic transducer with resistive load characteristics or approximately resistive load characteristics and ultra high efficiency. A driver for a dual magnet double magnetic gap double coil transducer according to claim 1, wherein the permanent magnet is a neodymium iron boron magnet or a rare earth permanent magnet. The driver of the dual magnet double magnetic gap double coil transducer according to claim 1, characterized in that the magnetic fluid is not allowed to be implanted in the annular magnetic gap. A double-magnet double-magnetic gap double-coil transducer driver includes a magnetic circuit and a frame and a base integrated therewith, an inner core mounted on an axial center of the convex platform surface of the base, and an inner core Two annular magnetic gaps of coaxial equal diameter are formed between the perpendicular peripheral surfaces of the mutually matching plates of an outer magnetic core which are enclosed and coaxially mounted, and a coil bobbin inserted into the annular magnetic gap is wound on the electromagnetic wires insulated from each other in parallel And forming a coil, a diaphragm and a planar sounding board coupled with the bobbin and the at least one elastic wave, and the diaphragm or the flat sounding board vibrates by the piston movement of the bobbin, or the sound is detected by the diaphragm The sound pressure changes and senses a corresponding audio signal in the coil, characterized in that: a. the frame is a frame made of a non-magnetic material; or the frame and the base are fused into a monolithic structure; b. Two disc-shaped upper and lower plates coaxially mounted and provided with a central shaft hole, the plates having the same thickness and projected area and matched with the permanent magnet, and having a central shaft hole a permanent magnetic magnet that axially magnetizes the upper and lower plates to form an inner core of the magnetic circuit; c. two coaxially mounted annular upper and lower plates, two The plates have the same thickness and projected area and are matched to the permanent magnets, and one or more of the equal thickness uniform axially magnetized permanent magnets will be the upper and lower poles The plate is bonded to form an outer core of the magnetic circuit; d. an open cylindrical base composed of a non-magnetic material, the axial portion of which is provided with a circular platform, and the axial portion of the circular platform Providing a through hole/or a screw hole matching the inner core plate and the permanent magnet shaft hole, the circular platform having a neat and rough level table and a neatly smooth vertical outer surface, the vertical outer An annular groove is disposed on an outer side of the circular surface, and two sides of the annular groove are respectively provided with an annular overflow groove having a width of 1-5 mm and a depth of 1-5 mm, and the groove bottom of the annular groove is provided Two or more uniformly arranged through holes, the outer side of the annular groove forming a neat and rough annular platform surface of the base, and the outer side of the annular platform surface is a cylindrical barrel wall of the base, the circle The corresponding axial height of the inner circumferential surface of the cylindrical wall or the top end portion thereof is provided with a smooth and aligning vertical positioning surface and a horizontal positioning surface, and the cylindrical horizontal wall has a plurality of evenly arranged screw holes on the top horizontal surface ; e. a fastener made of non-magnetic material has been pre-charged And the shaft hole of the magnetic core in the magnetic circuit is fixed and fixed on the axial center portion of the circular platform surface of the base, and the outer magnetic core of the magnetic circuit that has been pre-charged is coaxially embedded/mounted Or the joint is fixed on the annular platform surface of the base and is fixedly and/or adhesively positioned by the vertical positioning surface of the base cylindrical wall and the horizontal positioning surface; f. the magnetic circuit outer core will The inner core is surrounded by the permanent magnet of the outer core and the permanent magnet of the inner core having opposite polarities in the axial height; g. the upper and lower poles of the magnetic core in the magnetic circuit Forming two coaxial equal-diameter annular magnetic gaps between the plate and the vertical peripheral surfaces of the upper and lower plates of the outer magnetic core of the magnetic circuit, and inserting two coils of coaxial equal diameter into the annular magnetic gap, The winding direction of the two coils and the current flowing through the coil, so that the coils generate electric power F in the same direction at the same working moment; h. the upper plate of the magnetic core in the magnetic circuit and the outer core The bisector Z---Z axis of the upper plate and the matching coil web of one-half of the axial height is the same level axis, the lower plate of the inner core and the outer core The zonal Z---Z axis of the lower plate and the matching coil coil is also the same level axis, with the inner core permanent magnet and the outer core The bisector of the one-half axial height of the permanent magnet W---the axis is the horizontal symmetry axis, and the axis of the inner core and the center axis of the outer core is the vertical axis of symmetry. The double magnet double magnetic gap double coil transducer has two sets of symmetric magnetic circuits which are vertically symmetric and bilaterally symmetric in terms of geometric shape and magnetic properties, and two sets of symmetry in which geometrical and electrical properties are vertically symmetrical and bilaterally symmetric. Coil circuit, electromagnetic wire cross-sectional area of two coils, number of coil turns, coil coil, coil resistance, coil inductance The absolute value and the tension at the time of winding are equal to each other; i. the base annular groove is provided with a discharge magnetic circuit and thermal energy emitted by the coil circuit and the wearer is uniformly arranged to reduce the air damping of the transducer vibration system a venting hole, each of the penetrating vents having as large a projected area as possible and equal to each other when the base geometry and structural strength permit, and a center or a center line of the penetrating vent is disposed in the coil bobbin / or a circumferential line of the projection plane of the coaxial equal-diameter coil, and maintaining the left-right symmetrical state of the coil circuit while the transducer vibration system vibrates up and down; thereby, the double magnet double magnetic gap The inductance of the double coil transducer and the back electromotive force induced during the reciprocating motion have a phase of 180 degrees. The two-magnet double-magnetic gap double-coil transducer is a driver of an electroacoustic/or electromechanical transducer having resistive load characteristics or approximately resistive load characteristics and ultra-high efficiency. A driver for a dual magnet double magnetic gap double coil transducer according to claim 4, wherein the permanent magnet is a neodymium iron boron magnet or a rare earth permanent magnet. A driver for a dual magnet double magnetic gap double coil transducer as claimed in claim 4, characterized in that the magnetic fluid is not allowed to be implanted in the annular magnetic gap.