CN1119918C - Double-coil double-magnet gap transducer - Google Patents
Double-coil double-magnet gap transducer Download PDFInfo
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- CN1119918C CN1119918C CN 00122197 CN00122197A CN1119918C CN 1119918 C CN1119918 C CN 1119918C CN 00122197 CN00122197 CN 00122197 CN 00122197 A CN00122197 A CN 00122197A CN 1119918 C CN1119918 C CN 1119918C
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Abstract
The present invention relates to a transducer with double coils and double magnetic gaps. An upper magnetic yoke and a lower magnetic yoke are two inwards concave plate plates or circular flat plates. The transducer is provided with one group or more than three groups of permanent magnets with axial magnetic charging. The permanent magnets are directly fit with the pole faces of the flat plates. The shaft holes of the flat plates are perpendicular to the periphery surface, and form two magnetic gaps with external periphery surface of a cylindrical or columnar magnetic body in coaxial mounting. Coils can be inserted into the magnetic gaps. The coiling directions of the two coils and the direction of the current are specified, and the coils generate the electrodynamic force with the same direction. If the transducer is provided with a pair of magnetic circuits with completely symmetrical magnetic performance and coil circuits, and the inductance quantities of the two coils are specified to be the same, the transducer has the resistance load property.
Description
The present invention relates to electromechanical transducer, particularly have the transducer of two coaxial isometrical magnetic gaps and two coils, belong to the electromechanical transducer field of electricity.
In the prior art, JP6-233380A provides a kind of loud speaker with two magnetic gaps and two coils, and its major defect is: volume is huge relatively, sensitivity is on the low side, the inductance value of two coils can not be cancelled each other, and loud speaker remains a non-linear element, and fidelity is not ideal enough.CN94246701.9 provides a kind of double-tone circle double magnetic field double push-pull loudspeaker that has, its major defect is: volume is huge relatively, and the inductance value of two coils can not be cancelled each other, and sensitivity is on the low side, the axial stroke of coil is shorter, can't satisfy the user demand of high-power high sound pressure loud speaker.All adopt binding agent to fix between the permanent magnet of above-mentioned prior art and the yoke, when importing high-power signal continuously,, be easy to cause magnetic circuit to come unstuck fault and thoroughly damage loud speaker because eddy-current heating is serious.
In addition, the permanent magnet that uses in the prior art---magnetic pole binding agent has also increased the magnetic resistance of magnetic circuit and the complexity of production technology.
The objective of the invention is to overcome the weak point of prior art, provide some kinds have resistance load characteristics, high fidelity, high sensitivity, small size, ventilation and heat good, have long stroke or ultra-long-stroke, between permanent magnet and yoke pole-face, do not re-use two magnetic gap two-coil transducers of binding agent.
The object of the present invention is achieved like this:
A kind of double-coil double-magnet gap transducer, comprise magnetic circuit and link the all-in-one-piece framework with it with permanent magnet, two coaxial isometrical annular magnetic gaps and a coil rack that inserts magnetic gap, wound in parallel electric wire insulated from each other and constitute two coils on it, it is characterized in that: the upper magnet yoke of described magnetic circuit and lower yoke are the concave shaped flat boards that two coaxial installations and symmetrically arranged magnetic material are made, its outside central part is provided with a flat surface, the central part of described flat surface is provided with an axis hole, it is a circular hole normally, also can be a square or regular hexagon hole; The inner peripheral position of described upper magnet yoke and lower yoke is provided with the peripheral pole shoe of projection, at the permanent magnet that is provided with the axial charging of uniform uniform thickness more than one or between the pole-face of two peripheral pole shoes; The hollow frame that non-magnet material is made be inlaid in described upper magnet yoke and lower yoke the concave shaped flat board interior wide face and bonding is fixing with it, the inboard vertical plane of described permanent magnet is fixing by the outer vertical installing and locating of described hollow frame and bonding; Two pole-faces and described two pole-faces going up magnetic gap and lower yoke periphery pole shoe of described permanent magnet directly coincide, and described identical pole-face is applied static pressure and make it to connect to the outer core of as a whole magnetic circuit by the securing member that is arranged on the through hole on described upper magnet yoke and the lower yoke flat surface, corresponding screw and non-magnet material making; Two coaxial isometrical annular magnetic gaps of formation between the vertical side face with the outer peripheral face of dull and stereotyped coaxial mounted cylinder shape magnetic of central axis hole of described upper magnet yoke and lower yoke concave shaped or column magnetic and described upper magnet yoke and lower yoke central authorities axis hole, go into coaxial mounted two coils in described annular magnetic gap interpolation, two coils of regulation around to and the sense of current of flowing through coil, make described coil produce unidirectional electric power F in same work moment; Bisector X-X line with described permanent magnet 1/2nd axial heights is a horizontal symmetry axis, described double-coil double-magnet gap transducer has two groups of laterally zygomorphic magnetic circuits aspect geometry and magnetic property, stipulate two described coils after being connected in series around to just opposite, the wire cross-section of two described coils is long-pending, the number of turn and inductance value absolute value are equal to each other, and described double-coil double-magnet gap transducer is an electromechanical transducer with resistance load characteristics; The central axis hole of described coil and described concave shaped flat board and described cylinder shape magnetic or column magnetic mate mutually, its optimal cross-section is shaped as regular hexagon, the top of each hexagon interior angle or regular polygon interior angle is provided with the symmetrical circular line section of a cutting back, the both sides of this line segment and this interior angle are tangent respectively, and its center of circle is then dropped on the angular bisector of this interior angle; Concave shaped convection current pore uniform more than two can also be set on the peripheral pole shoe of described upper magnet yoke and lower yoke, equal when the bottom of this pore is the darkest with the interior wide bottom surface of described concave shaped flat board; Binding agent between described upper magnet yoke and lower yoke and described permanent magnet and the described hollow frame is core sphering location soon after all assembling is finished outside described magnetic circuit.Described upper magnet yoke and lower yoke are the concave shaped flat boards of two circles, and described permanent magnet is a circular permanent magnet or fan shape or a disk shape or the ring plate shape rare-earth permanent magnet that above uniform thickness is uniform.Described upper magnet yoke and lower yoke are the concave shaped flat boards of two regular polygons, and described permanent magnet is the uniform strip rare-earth permanent magnets of three or more uniform thickness.Described upper magnet yoke and lower yoke are the concave shaped flat boards of two rectangles, and described permanent magnet is four strip rare-earth permanent magnets that uniform thickness is uniform.Around the vertical external profile surface of described upper magnet yoke and lower yoke and described permanent magnet, be provided with more than two sections or two sections in the driver sheath of making of non-magnet material closely is wrapped in it, the interior wide face of described driver sheath is identical each other with the vertical external profile surface of described yoke and described permanent magnet and be bonded to as a whole magnetic circuit; The carriage that non-magnetic conduction rigid material is made, its central part is provided with an axis hole, central axial line with described axis hole is a symmetry axis, be provided with an inner concave platform face in the outside of axis hole, be provided with a coaxial annular groove in the outside of described inner concave platform face, be provided with coaxial and a described lower yoke outside flat surface fixing carriage mounting plane that coincide in the outside of described annular groove, the securing member that coaxial mounted cylinder shape magnetic or column magnetic are made by one group of non-magnet material is fixed on the axis part of described inner concave platform face, constitute two coaxial isometrical annular magnetic gaps between the vertical side face of the outer peripheral face of described cylinder shape magnetic or column magnetic and described upper magnet yoke and lower yoke central authorities axis hole, constitute a complete double-coil double-magnet gap transducer driver magnetic circuit thus.A coaxial framework that links together with described magnetic circuit, the waist of described framework is provided with a coaxial uncovered cylinder, the tube end inner side plane of described cylinder is provided with a coaxial annular groove, the inboard of described annular groove and the outside are respectively equipped with two coaxial annular flat table tops, the axis part of that annular flat table top placed in the middle is provided with the convex column that a non-magnetic conduction rigid material is made, described cylinder shape magnetic is sleeved on the described convex column, in the cylinder shape web that non-magnet material is made closely is wrapped in the vertical external profile surface of described upper magnet yoke and lower yoke and bonding fixing, with link the outer core of the described magnetic circuit of all-in-one-piece embed described framework described cylinder inboard mating surface and be bonded to as a whole with described framework.
A kind of double-coil double-magnet gap transducer, comprise magnetic circuit and link the all-in-one-piece framework with it with permanent magnet, two coaxial isometrical annular magnetic gaps and a coil rack that inserts magnetic gap, wound in parallel electric wire insulated from each other and constitute two coils on it, it is characterized in that: the upper magnet yoke of described magnetic circuit and lower yoke are the concave shaped flat boards that two coaxial installations and symmetrically arranged magnetic material are made, its outside central part is provided with a flat surface, the central part of described flat surface is provided with an axis hole, it is a circular hole normally, also can be a square or regular hexagon hole; The inner peripheral position of described upper magnet yoke and lower yoke is provided with the peripheral pole shoe of projection, at the permanent magnet that is provided with the axial charging of uniform uniform thickness more than one or between the pole-face of two peripheral pole shoes; The hollow frame that non-magnet material is made be inlaid in described upper magnet yoke and lower yoke the concave shaped flat board interior wide face and bonding is fixing with it, the inboard vertical plane of described permanent magnet is fixing by the outer vertical installing and locating of described hollow frame and bonding; Two pole-faces and described two pole-faces going up magnetic gap and lower yoke periphery pole shoe of described permanent magnet directly coincide, and described identical pole-face is applied static pressure and make it to connect to the outer core of as a whole magnetic circuit by the securing member that is arranged on the through hole on described upper magnet yoke and the lower yoke flat surface, corresponding screw and non-magnet material making; Two coaxial isometrical annular magnetic gaps of formation between the vertical side face with the outer peripheral face of dull and stereotyped coaxial mounted cylinder shape magnetic of central axis hole of described upper magnet yoke and lower yoke concave shaped or column magnetic and described upper magnet yoke and lower yoke central authorities axis hole, go into coaxial mounted two coils in described annular magnetic gap interpolation, two coils of regulation around to and the sense of current of flowing through coil, make described coil produce unidirectional electric power F in same work moment; The central axis hole of described coil and described concave shaped flat board and described cylinder shape magnetic or column magnetic mate mutually, its optimal cross-section is shaped as regular hexagon, the top of each hexagon interior angle or regular polygon interior angle is provided with the symmetrical circular line section of a cutting back, the both sides of this line segment and this interior angle are tangent respectively, and its center of circle is then dropped on the angular bisector of this interior angle; Concave shaped convection current pore uniform more than two can also be set on the peripheral pole shoe of described upper magnet yoke and lower yoke, equal when the bottom of this pore is the darkest with the interior wide bottom surface of described concave shaped flat board; Binding agent between described upper magnet yoke and lower yoke and described permanent magnet and described hollow frame core outside described magnetic circuit solidifies the location after all assembling and finishing soon.Described upper magnet yoke and lower yoke are the concave shaped flat boards of two circles, and described permanent magnet is a circular permanent magnet or fan shape or a disk shape or the ring plate shape rare-earth permanent magnet that above uniform thickness is uniform.Described upper magnet yoke and lower yoke are the concave shaped flat boards of two regular polygons, and described permanent magnet is the uniform strip rare-earth permanent magnets of three or more uniform thickness.Described upper magnet yoke and lower yoke are the concave shaped flat boards of two rectangles, and described permanent magnet is four strip rare-earth permanent magnets that uniform thickness is uniform.Around the vertical external profile surface of described upper magnet yoke and lower yoke and described permanent magnet, be provided with more than two sections or two sections in the driver sheath of making of non-magnet material closely is wrapped in it, the interior wide face of described driver sheath is identical each other with the vertical external profile surface of described yoke and described permanent magnet and be bonded to as a whole magnetic circuit; The carriage that non-magnetic conduction rigid material is made, its central part is provided with an axis hole, central axial line with described axis hole is a symmetry axis, be provided with an inner concave platform face in the outside of axis hole, be provided with a coaxial annular groove in the outside of described inner concave platform face, be provided with coaxial and a described lower yoke outside flat surface fixing carriage mounting plane that coincide in the outside of described annular groove, the securing member that coaxial mounted cylinder shape magnetic or column magnetic are made by one group of non-magnet material is fixed on the axis part of described inner concave platform face, constitute two coaxial isometrical annular magnetic gaps between the vertical side face of the outer peripheral face of described cylinder shape magnetic or column magnetic and described upper magnet yoke and lower yoke central authorities axis hole, constitute a complete double-coil double-magnet gap transducer driver magnetic circuit thus.A coaxial framework that links together with described magnetic circuit, the waist of described framework is provided with a coaxial uncovered cylinder, the tube end inner side plane of described cylinder is provided with a coaxial annular groove, the inboard of described annular groove and the outside are respectively equipped with two coaxial annular flat table tops, the axis part of that annular flat table top placed in the middle is provided with the convex column that a non-magnetic conduction rigid material is made, described cylinder shape magnetic is sleeved on the described convex column, in the cylinder shape web that non-magnet material is made closely is wrapped in the vertical external profile surface of described upper magnet yoke and lower yoke and bonding fixing, with link the outer core of the described magnetic circuit of all-in-one-piece embed described framework described cylinder inboard mating surface and be bonded to as a whole with described framework.
A kind of double-coil double-magnet gap transducer, comprise magnetic circuit and link the all-in-one-piece framework with it with permanent magnet, two coaxial isometrical annular magnetic gaps and a coil rack that inserts magnetic gap, wound in parallel electric wire insulated from each other and constitute two coils on it, it is characterized in that: the upper magnet yoke of described magnetic circuit and lower yoke are the circular flat boards that two coaxial installations and symmetrically arranged magnetic material are made, described circular dull and stereotyped central part is provided with an axis hole, it is a circular hole normally, also can be a square or regular hexagon hole; The permanent magnet of uniform uniform thickness more than three groups or three groups is set at the outer periphery position of described upper magnet yoke and lower yoke central authorities axis hole, every group of permanent magnet is made up of two blocks of superimposed annular permanent magnets of series connection of axial charging, four pole-faces of every group of permanent magnet and described to go up in magnetic gap and lower yoke two wide pole-face all directly identical are by being arranged on the through hole that is positioned at every group of annular permanent magnet axis part on described upper magnet yoke and the lower yoke, corresponding screw and non-magnet material securing member apply static pressure to the identical pole-face of every group of permanent magnet and make it and described upper magnet yoke and lower yoke connect to as a whole magnetic circuit core outward; Two coaxial isometrical annular magnetic gaps of formation between the vertical side face with the outer peripheral face of described upper magnet yoke and lower yoke central authorities' coaxial mounted cylinder shape magnetic of axis hole or column magnetic and the central axis hole of described upper magnet yoke and lower yoke, go into coaxial mounted two coils in described annular magnetic gap interpolation, two coils of regulation around to and the sense of current of flowing through coil, make described coil produce unidirectional electric power F in same work moment; Bisector X---X line with described permanent magnet 1/2nd axial heights is a horizontal symmetry axis, described electromechanical transducer has two groups of laterally zygomorphic magnetic circuits aspect geometry and magnetic property, stipulate two described coils after being connected in series around to just opposite, the wire cross-section of two described coils is long-pending, the number of turn and inductance value absolute value are equal to each other, and described double-coil double-magnet gap transducer is an electromechanical transducer with resistance load characteristics; Described coil and described circular dull and stereotyped central axis hole and described cylinder shape magnetic or column magnetic mate mutually, its optimal cross-section is shaped as regular hexagon, the top of each hexagon interior angle or regular polygon interior angle is provided with the symmetrical circular line section of a cutting back, the both sides of this line segment and this interior angle are tangent respectively, and its center of circle is then dropped on the angular bisector of this interior angle; Be provided with the space between the external profile surface of every group of uniform described permanent magnet, constitute the heat loss through convection air flue of double-coil double-magnet gap transducer driver thus.The carriage that non-magnetic conduction rigid material is made, its central part is provided with an axis hole, be provided with a coaxial inner concave platform face in the outside of described axis hole, be provided with a coaxial annular groove in the outside of described inner concave platform face, be provided with coaxial and a described lower yoke outside flat surface fixing carriage mounting plane that coincide in the outside of described annular groove, the securing member that coaxial mounted cylinder shape magnetic or column magnetic are made by one group of non-magnet material is fixed on the axis part of described inner concave platform face, constitute two coaxial isometrical annular magnetic gaps between the vertical side face of central axis hole of the outer peripheral face of described cylinder shape magnetic or column magnetic and described upper magnet yoke and lower yoke, constitute a complete double-coil double-magnet gap transducer driver magnetic circuit thus.A coaxial framework that links together with described magnetic circuit, the waist of described framework is provided with a coaxial uncovered cylinder, the tube end inner side plane of described cylinder is provided with a coaxial annular groove, the inboard of described annular groove and the outside are respectively equipped with two coaxial annular flat table tops, the axis part of that annular flat table top placed in the middle is provided with the convex column that a non-magnetic conduction rigid material is made, described cylinder shape magnetic is sleeved on the described convex column, with link the outer core of the described magnetic circuit of all-in-one-piece embed described framework described cylinder inboard mating surface and be bonded to as a whole with described framework.
A kind of double-coil double-magnet gap transducer, comprise magnetic circuit and link the all-in-one-piece framework with it with permanent magnet, two coaxial isometrical annular magnetic gaps and a coil rack that inserts magnetic gap, wound in parallel electric wire insulated from each other and constitute two coils on it, it is characterized in that: the upper magnet yoke of described magnetic circuit and lower yoke are the circular flat boards that two coaxial installations and symmetrically arranged magnetic material are made, described circular dull and stereotyped central part is provided with an axis hole, it is a circular hole normally, also can be a square or regular hexagon hole; The permanent magnet of uniform uniform thickness more than three groups or three groups is set at the outer periphery position of described upper magnet yoke and lower yoke central authorities axis hole, every group of permanent magnet is made up of two blocks of superimposed annular permanent magnets of series connection of axial charging, four pole-faces of every group of permanent magnet and described to go up in magnetic gap and lower yoke two wide pole-face all directly identical are by being arranged on the through hole that is positioned at every group of annular permanent magnet axis part on described upper magnet yoke and the lower yoke, corresponding screw and non-magnet material securing member apply static pressure to the identical pole-face of every group of permanent magnet and make it and described upper magnet yoke and lower yoke connect to as a whole magnetic circuit core outward; Two coaxial isometrical annular magnetic gaps of formation between the vertical side face with the outer peripheral face of described upper magnet yoke and lower yoke central authorities' coaxial mounted cylinder shape magnetic of axis hole or column magnetic and the central axis hole of described upper magnet yoke and lower yoke, go into coaxial mounted two coils in described annular magnetic gap interpolation, two coils of regulation around to and the sense of current of flowing through coil, make described coil produce unidirectional electric power F in same work moment; Described coil and described circular dull and stereotyped central axis hole and described cylinder shape magnetic or column magnetic mate mutually, its optimal cross-section is shaped as regular hexagon, the top of each hexagon interior angle or regular polygon interior angle is provided with the symmetrical circular line section of a cutting back, the both sides of this line segment and this interior angle are tangent respectively, and its center of circle is then dropped on the angular bisector of this interior angle; Be provided with the space between the external profile surface of every group of uniform described permanent magnet, constitute the heat loss through convection air flue of double-coil double-magnet gap transducer driver thus.The carriage that non-magnetic conduction rigid material is made, its central part is provided with an axis hole, be provided with a coaxial inner concave platform face in the outside of described axis hole, be provided with a coaxial annular groove in the outside of described inner concave platform face, be provided with coaxial and a described lower yoke outside flat surface fixing carriage mounting plane that coincide in the outside of described annular groove, the securing member that coaxial mounted cylinder shape magnetic or column magnetic are made by one group of non-magnet material is fixed on the axis part of described inner concave platform face, constitute two coaxial isometrical annular magnetic gaps between the vertical side face of central axis hole of the outer peripheral face of described cylinder shape magnetic or column magnetic and described upper magnet yoke and lower yoke, constitute a complete double-coil double-magnet gap transducer driver magnetic circuit thus.A coaxial framework that links together with described magnetic circuit, the waist of described framework is provided with a coaxial uncovered cylinder, the tube end inner side plane of described cylinder is provided with a coaxial annular groove, the inboard of described annular groove and the outside are respectively equipped with two coaxial annular flat table tops, the axis part of that annular flat table top placed in the middle is provided with the convex column that a non-magnetic conduction rigid material is made, described cylinder shape magnetic is sleeved on the described convex column, with link the outer core of the described magnetic circuit of all-in-one-piece embed described framework described cylinder inboard mating surface and be bonded to as a whole with described framework.
The present invention has following major advantage:
1, between the pole-face of the upper and lower yoke of transducer and permanent magnet, do not re-use binding agent, simplified mounting process, reduced the magnetic circuit magnetic resistance, overcome eddy-current heating and caused the magnetic circuit to come unstuck and the long-standing abuse of " stuck " coil.
2, high fidelity.Can make all kinds of electroacoustic transducers that have resistance load characteristics or be similar to resistance load characteristics, promote the output acoustic pressure of electroacoustic transducer low frequency end and front end significantly, eliminate the phase distortion of transducer and harmonic distortion is reduced to Min..
3, high sensitivity.Under the suitable situation of bore, material and technical indicator, the efficient of more traditional electromechanical transducer improves more than 2～16 times.
4, can make all kinds of electromechanical transducers of long stroke or ultra-long-stroke.
5, volume is small and exquisite, simple in structure, the ratio of performance to price is high, be easy to implement scale production.
The explanation of accompanying drawing drawing:
Fig. 1 shows the electromechanical transducer driver sectional arrangement drawing of the embodiment of the invention 1.
Fig. 2 shows the loud speaker sectional arrangement drawing of the embodiment of the invention 2.
Fig. 3 shows the magnetic circuit A-A flat sectional drawing of the embodiment of the invention 2.
Fig. 4 shows the magnetic circuit A-A flat sectional drawing of the embodiment of the invention 3.
Fig. 5 shows the magnetic circuit A-A flat sectional drawing of the embodiment of the invention 4.
Fig. 6 shows the magnetic circuit A-A flat sectional drawing of the embodiment of the invention 5.
Fig. 7 shows the magnetic circuit A-A flat sectional drawing of the embodiment of the invention 6.
Fig. 8 shows the loud speaker sectional arrangement drawing of the embodiment of the invention 7.
Fig. 9 shows the magnetic circuit A-A flat sectional drawing of the embodiment of the invention 7.
Figure 10 shows the electromechanical transducer circuit theory winding diagram that the present invention has resistance load characteristics.
Figure 11 shows the carriage plane graph of the embodiment of the invention 1.
Figure 12 shows flat, the elevation of driver that the embodiment of the invention 1 has sheath.
Figure 13 shows flat, the elevation of driver that the embodiment of the invention 2 has sheath.
Figure 14 shows an embodiment plane graph of hollow frame of the present invention.
Figure 15 shows another embodiment plane graph of hollow frame of the present invention.
Figure 16 shows the embodiment floor map that the present invention has the regular hexagon magnetic gap.
Figure 17 shows the circular line section embodiment floor map of regular hexagon magnetic gap of the present invention and regular hexagon cylinder shape magnetic interior angle.
Figure 18 shows the flat facade node of the embodiment schematic diagram that the present invention has the column magnetic.
Element of the present invention and label corresponding relation are as follows: pole-face---and 100,200,500,600,700,800,900; Framework---101,201,501,601,701,801,901; Framework is installed screw---and 1061,2061,5061,7061,8061,9061; Recessed position mating surface---133,233,533,633,733,833,933; Annular groove---135,235,535,635,735,835,935; Permanent magnet---102,202,502,602,702,802,902; Upper magnet yoke (lower yoke)---103,203,503,603,703,803,903; Yoke periphery pole shoe---129,229,529,629,729,829; The heat loss through convection pore---117,217,517,717,917; Upper magnet yoke (lower yoke) outside flat surface---10300,20300,50300,60300,70300,80300,90300; Wide face in the upper magnet yoke (lower yoke)---124,224,524,624,724,824; The upper magnet yoke through hole---1061,2061,5061,6061,7061,8061,9061; The lower yoke screw---1071,2071,5071,6071,7071,8071,9071; The convex antelabium---1030,2030,5030,6030,7030,8030,9030; The cylinder shape web---136,236,536,636,736,836; Structure space---163,263,563,663,763,863,963; Hollow frame---104,204,504,604,704,804; The hollow frame external profile surface---134,234,534,634,734,834; Wide face in the hollow frame---173,273,573,673,773,873; The hollow frame outer vertical---122,222,522,622,722,822,922; Vibrating diaphragm---106,206,506,606,706,806,906; Elasticity is hanged the limit---and 199,299,599,699,799,899,999; The elastic damping plate---141,241,541,641,741,841,941; Coil rack---107,207,507,607,707,807,907; Coil---109,209,509,609,709,809,909; Annular bearing surface---108,208,508,608,708,808,908; Annular bearing surface---142,242,542,642,742,842,942; Annular groove---1630,2630,5630,6630,7630,8630,9630; The annular magnetic gap---110,210,510,610,710,810,910; The inner concave platform face---111,211,511,611,711,811,911; The convex column---112,212,512,612,712,812,912; Cylinder shape magnetic-113,213,513,613,713,813,913; Central authorities' axis hole---114,214,314,514,614,714,814,914; Cylinder shape magnetic packing ring---184,284,584,684,784,884,984; Carriage---181,281,581,681,781,881,981; The carriage pore---182,282,582,682,782,882,982; The carriage through hole---187,287,587,687,787,887,987; Concave plane in the carriage outside---1811,2811,5811,6811,7811,8811,9811; Carriage inner concave platform face---1118,2118,5118,6118,7118,8118,9118; The carriage mounting plane---1800,2800,5800,6800,7800,8800,9800; The carriage screw---188,288,588,688,788,888,988; Nut---183,283,583,683,783,883,983; The driver sheath---137,237,537,637,737,837; Wide groove in the sheath---139,239,539,639,739,839; Wide face in the sheath---138,238,538,638,738,838; The sheath louvre---140,240,540,640,740,840; Non-magnetic conduction securing member---1000,2000,8000,5000,6000,7000,9000; Non-magnetic conduction trip bolt---181,281,581,681,781,881,981; Binding agent---001
The present invention is further elaborated below with reference to accompanying drawing embodiment.
Fig. 2 shows the loud speaker sectional arrangement drawing of the embodiment of the invention 2.
In order to give full play to the high energy product advantage of neodium magnet, present embodiment fills the neodium magnet thin slice in advance and is inlaid in upper magnet yoke 203 again after saturated
AWith lower yoke 203
BPeripheral pole shoe between, detailed description can be consulted the WO98/47312 patent documentation that the inventor proposes in addition.(undoubtedly, also can be at upper magnet yoke 203
A, lower yoke 203
B, permanent magnet 202, hollow frame 204 and annular web 236 bondings magnetize to permanent magnet after being fixed into as a whole magnetic circuit again)
Loud speaker has the framework 201 that a non-magnetic conduction rigid material such as employing aluminium alloy is made, and it is slightly cylindrical below waist.The axle center bottom part of cylinder is provided with an inner concave platform, this inner concave platform face 211 be one with the symmetrically arranged annular horizontal plane of axis hole 210 central axial lines.The middle part of going up of cylinder is provided with a recessed position mating surface 233, and it is coaxial and intersect vertically with inner concave platform face 211.The outside of inner concave platform face 211 is provided with a coaxial annular groove 235, and it provides enough axial row spaces down for loudspeaker coil frame 207.The outside of annular groove 235 is provided with an annular flat table top 2110 again, and they are equally coaxial and intersect vertically with recessed position mating surface 233.
By upper magnet yoke 203
A, lower yoke 203
B, the outer core of driver magnetic circuit that combines of permanent magnet 202, hollow frame 204 and annular web 236 from the lateral direction of framework 201 embed frame mid portion be recessed position cylindraceous mating surface 233 after, cylinder shape magnetic 213 setting-ins that a magnetic material is made are located to a convex column 212 that is positioned at inner concave platform face 211 axis parts on and by inner concave platform face 211 bondings again.The convex column 212 that non-magnet material is made can be when pack alloy framework 201 integrated molding, also can adopt non-magnetic conduction securing member that its setting-in is fixed on the tube lower shaft heart position of framework cylinder.As seen from Figure 1, the upper magnet yoke 203 of present embodiment
AWith lower yoke 203
BAxis of centres bore dia design smallerly than the projection plane diameter of the fan shape permanent magnet 202 of four well-balanced layouts, thereby coaxial mounted concave shaped flat board is radially inboard to stretch out a well-balanced convex antelabium 2030
AWith 2030
B, constitute two coaxial isometrical annular magnetic gaps 210 up and down between the outer peripheral face of their vertical inner peripheral surface and coaxial mounted cylinder shape magnetic 213
AWith 210
BBe wound with two independently coils 209 on the coil rack 207 cylindraceous
AWith 209
B, the upper end of coil rack 207 and the diaphragm of loudspeaker 206, traditional elastic damping plate 241 bonding bindings, the other end of outstanding limit 299 of the elasticity of vibrating diaphragm 206 and elastic damping plate 241 is bonded in respectively on the annular bearing surface 242 and 208 that framework 201 provides.Polarity after permanent magnet 202 magnetizes such as this figure indicate, and be example with the left side magnetic circuit of Fig. 2 loud speaker central axial line: the permanent-magnet line is via the 202N utmost point → 203
A→ 210
A→ 209
A→ 210 → 213 → 210
B→ 209
B→ 210
B→ 203
B→ 202S the utmost point and constitute into closed magnetic circuit.Compare with the ring plate and the T word iron circuit of conventional loudspeakers, the present invention has omitted the T word iron parts of magnetic line of force direction being changed 90 degree angles, thereby the equivalent inductance of magnetic circuit and leakage flux all reduce significantly, and the electro-acoustic conversion efficiency of loud speaker can significantly be promoted.
Be example still: go up magnetic gap 210 with Fig. 2 loud speaker central axial line left side magnetic circuit
AMiddle permanent-magnet line passes through the coil 209 in the magnetic gap from left to right
A, following magnetic gap 210
BIn the permanent-magnet line pass through coil 209 in the magnetic gap by the right side
B, the magnetic line of force direction in two magnetic gaps just differs 180 degree phase angles up and down.Therefore, when looking fashionable from the vibrating diaphragm direction, as long as two coils 209 of regulation
AWith 209
BAround on the contrary, for example coil 209
AFor clockwise around to coil 209
BFor inhour around to, according to the Lorentz force principle of electricity, when the same work moment that above-mentioned two coils are connected tone currents, coil 209
AThe electric power F that produces
AWith coil 209
BThe electric power F that produces
BDirection identical, the electric power F=F of loudspeaker coil
A+ F
BWhen tone currents is anti-phase, electric power F
A, F
BDirection also opposite, this moment loud speaker electric power F=F
A+ F
BEquation remain unchanged, the direction of the F that just makes a concerted effort is opposite.
This shows that the simplest mode of connection of present embodiment loudspeaker coil circuit is with coil 209
AWith coil 209
BReverse parallel connection connects, and at this moment, the equivalent inductance of loud speaker reduces by 1/2nd because of coils from parallel connection of coils work, and its impedance---frequency response curve is compared with traditional unicoil loud speaker and obtained tangible improvement.
When loud speaker moves under the large-signal tone currents continuously, upper magnet yoke 203
A, lower yoke 203
BWith in the cylinder shape magnetic 213 because of the serious heating of eddy current produces thermal expansion, but owing to upper magnet yoke 203
A, lower yoke 203
BOuter vertical by annular web 236 and framework 201 bonding location, the inboard vertical plane of permanent magnet 202 is by the outer vertical 222 bonding location of hollow frame 204, the binding agent 001 at above-mentioned bonding locating surface place only is subjected to the tension stress or the compression of vertical direction, so binding agent 001 has maximum tension and compression strength.Upper and lower yoke can not produce horizontal displacement in such cases.Equally, because the existence of bonding locating surface 211 and convex column 212, suit cylinder shape magnetic thereon also can not produce horizontal displacement or center displacement.
By upper magnet yoke 203
A, lower yoke 203
BThe structure space 263 that constitutes with hollow frame 204 inboard vertical planes can reduce the air bag damping action that produces in the diaphragm of loudspeaker 206 axial motion processes, the result of ventilating heat dissipation that helps improving the transient response speed of loud speaker and improve coil.
On the peripheral pole shoe at two block permanent magnet adjacent spaces places, 4 convection current pores 217 can also be set, equal with the interior wide bottom surface of upper and lower yoke when the bottom of this pore is the darkest, embodiment can be consulted Fig. 3 and shown in Figure 12.
Fig. 1 shows the electromechanical transducer driver sectional arrangement drawing of the embodiment of the invention 1.
Upper magnet yoke 103
A, lower yoke 103
B, permanent magnet 102, hollow frame 104 link by binding agent 001 and upper magnet yoke through hole 1061, lower yoke screw 1071, non-magnetic conduction securing member 1000 and be fixed into as a whole magnetic circuit, its execution mode is identical with the explanation of Fig. 2 embodiment 2, so no longer give repetition.
Because the rare-earth permanent magnet for example Br value and the maximum magnetic energy product of ndfeb magnet is all very high, on the electromechanical transducer driver external profile surface of implementing in the manner described above to obtain, the magnetic field gradient of leakage flux is higher, thereby be easy to that ferromagnetic substance is attracted to actuator surface the magnetic flux density in the driver annular magnetic gap is reduced.In addition, rare-earth magnet quality fragilities such as neodymium iron boron are exposed to and are easy to be subjected to mechanical shock when outer and damage.In order to overcome these two shortcomings and the further entire combination intensity of strengthening electromechanical transducer drive combination magnetic circuit, the driver sheath 137 that present embodiment adopts two sections non-magnet materials to make is along upper magnet yoke 103
A, lower yoke 103
B, permanent magnet 102 vertical external profile surface described magnetic circuit closely is wrapped in.Sheath 137 adds with plastics in the present embodiment and is cast into.The interior wide face 138 of sheath 137 is provided with wide groove 139 in the sheath that mates with permanent magnet 102 gabarit vertical planes, in described sheath, be coated with binding agent 001 in advance on the vertical external profile surface of wide face 138 or described magnetic circuit, by the inboard, lateral sheath 137 applied static pressure Fin shown in Figure 12 direction of arrow simultaneously.Also be coated with binding agent 001 in advance and pushed by static pressure Fin at the faying face place of every section sheath, treat promptly to obtain an electromechanical transducer driver that combined strength is higher after the adhesive cures.Undoubtedly, the binding site at two sections sheaths 137 is provided with through hole or screw, the securing member that utilizes non-magnet material to make, the driver that also can implement to obtain having same effect.Because this is the known technology of general knowledge scope, the present invention no longer draws accompanying drawing and further describes to this.
Different with the embodiment of the invention 2 is: in described lower yoke 103
BOutside flat surface 10300
BCentral part, the carriage 181 that non-permeability alloys die casting aluminium is made has coaxial and a symmetrically arranged annular mounting plane 1800, which is provided with 4 uniform carriage through holes 187, by 4 screws carriage 181 being coincide is fixed on lower yoke outside flat surface 10300
BAxis part on.The central part of described carriage 181 is provided with an axis hole 188, be provided with a coaxial inner concave platform face 1118 in its outside, be provided with a coaxial annular groove 1630 in the outside of inner concave platform face 1118, described annular groove 1630 outside (descending) sides are extended to constitute the essential following row space of electromechanical transducer coil rack.184, non-magnetic conduction trip bolts 180 of cylinder shape magnetic packing ring that a non-magnet material making is installed in the upper surface of a cylinder shape magnetic 113 pass the axis part that described packing ring is bonded and fixed at the lower surface of cylinder shape magnetic 113 in the inner concave platform face 1118 of carriage 181.The outer peripheral face of described cylinder shape magnetic 113 and upper magnet yoke 103
AWith lower yoke 103
BThe vertical side face of axis hole between constitute two coaxial isometrical annular magnetic gaps 110
AWith 110
BA coil rack 107 inserts described two annular magnetic gaps, two coils 109 of coiling on it
AWith 109
B, two described coils of regulation around on the contrary, for example coil 109
AFor clockwise around to, coil 109
BFor inhour around to, constitute to use the electromechanical transducer driver of carrier structure thus.
In addition, the vibrating diaphragm framework of present embodiment can also adopt screw to be directly installed on upper magnet yoke 103
AOutside flat surface 10300
AOn, for example traditional aluminium alloy taper framework; Can certainly directly vibrating diaphragm and supporting clamping plate directly be fixed on upper magnet yoke 103
AOutside flat surface 10300
AOn, for example traditional hemisphere is risen the sound diaphragm of loudspeaker and supporting framework thereof.
Air bag damping effect when reducing the electromechanical transducer axial motion is also improved the radiating effect of coil, and several uniform carriage pores 182 can also be set on the bottom land plane 16300 of supporter ring connected in star, specifically can be referring to shown in Figure 11.
Except above-mentioned points, the explanation of the structure of present embodiment, operation principle and Fig. 2 embodiment 2 is identical and no longer be repeated in this description.
Fig. 3 shows the magnetic circuit A-A flat sectional drawing of the embodiment of the invention 2.
The upper magnet yoke 203 of loud speaker
AWith lower yoke 203
BBe two coaxial and symmetrically arranged circular concave shaped flat boards, four thickness, area, volume, the neodium magnet fan shape thin slice 202 that magnetic property is identical are inlaid in described yoke periphery pole shoe 229
AWith 229
BPole-face 200 between, the end of every block of magnet is left appropriate gap and is constituted the convection current pore 217 be distributed in four sides.Upper magnet yoke 203
AWith lower yoke 203
BPeripheral pole shoe 229
AWith 229
BBe provided with 4 rectangle convection current pores 217 that match, the bottom of this pore is equal with the interior wide bottom surface of described concave shaped flat board.Hollow frame 204 omits in this figure and does not paint.
All the other are partly identical and no longer be repeated in this description with the structure of embodiment 2, embodiment 1 and operation principle.
Fig. 4 shows the magnetic circuit A-A flat sectional drawing of the embodiment of the invention 3.
The upper magnet yoke 803 of electromechanical transducer
AWith lower yoke 803
BBe two coaxial also concave shaped flat boards of symmetrically arranged circle, permanent magnet 802 is one and is inlaid in described yoke periphery pole shoe 829
AWith 829
BPole-face 800 between the annular neodium magnet.Three be distributed on through hole 806 on the upper magnet yoke flat surface 804 and three corresponding with it be distributed on screw 807 on the lower yoke flat surface 804, the securing member of making for three non-magnet materials assembles the usefulness of transducer driver magnetic circuit.Hollow frame 804 omits in this figure and does not paint.
All the other are partly identical and no longer be repeated in this description with the structure of embodiment 2, embodiment 1 and operation principle.
Fig. 5 shows the magnetic circuit A-A flat sectional drawing of the embodiment of the invention 4.
The upper magnet yoke 503 of electromechanical transducer
AWith lower yoke 503
BBe two coaxial symmetrically arranged square concave shaped flat boards, four thickness, area, volume, the neodium magnet strip thin slice 502 that magnetic property is identical are inlaid in described yoke periphery pole shoe 529
AWith 529
BPole-face 500 between, the end of every block of magnet is left appropriate gap and is constituted the convection current pore 517 be distributed in four sides.Peripheral pole shoe 529 in described yoke
AWith 529
BBe provided with 4 uniform through holes 5061 and corresponding screw 5071, assemble the usefulness of transducer driver magnetic circuit for the securing member of four non-magnet materials making.Hollow frame 504 omits in this figure and does not paint.
All the other are partly identical and no longer be repeated in this description with the structure of the embodiment of the invention 2, embodiment 1 and operation principle.
Fig. 6 shows the magnetic circuit A-A flat sectional drawing of the embodiment of the invention 5.
The upper magnet yoke 603 of electromechanical transducer
AWith lower yoke 603
BBe two coaxial symmetrically arranged square concave shaped flat boards, four thickness, area, volume, the strip neodium magnet thin slice 602 that magnetic property is identical are inlaid in described yoke periphery pole shoe 629
AWith 629
BPole-face 600 between.Four are distributed on upper magnet yoke 603
AThrough hole 6061 on the flat surface and four are distributed on lower yoke 603
BCorresponding screw 6071 on the flat surface, the securing member that supplies four non-magnet materials to make assembles the usefulness of transducer driver magnetic circuit.Hollow frame 504 omits in this figure and does not paint.
All the other are partly identical and no longer be repeated in this description with the structure of the embodiment of the invention 2, embodiment 1 and operation principle.
Fig. 7 shows the magnetic circuit A-A flat sectional drawing of the embodiment of the invention 6.
The upper magnet yoke 703 of electromechanical transducer
AWith lower yoke 703
BBe two coaxial symmetrically arranged rectangle concave shaped flat boards, at two areas of the long side direction of rectangle configuration, volume, bigger strip neodium magnet book 702 that magnetic property is identical.The thickness of less strip permanent magnet 702, four block permanent magnets that equate at two areas of the short side direction of rectangle configuration, volume, magnetic property is equal fully.As long as suitably select the permanent magnet physical dimension of long side direction, just can obtain well-balanced magnetic flux density in the driver annular magnetic gap 710 after assembling is finished.Peripheral pole shoe 729 in described yoke
AWith 729
BBe provided with 4 uniform through holes 7061 and corresponding screw 7071, assemble the usefulness of transducer driver magnetic circuit for the securing member of four non-magnet materials making.Hollow frame 704 omits in this figure and does not paint.
All the other are partly identical and no longer be repeated in this description with the structure of the embodiment of the invention 2, embodiment 1 and operation principle.
Fig. 8 shows the loud speaker sectional arrangement drawing of the embodiment of the invention 7.
Embodiment 7 is the magnetic structure of loud speaker as different from Example 2: upper magnet yoke 903
AWith lower yoke 903
BBe two coaxial mounted symmetrically arranged circular flat boards, the central part of described flat board is provided with a central axis hole 910, outer periphery position at the central axis hole of upper and lower yoke, be provided with 8 groups of permanent magnets of evenly arranging, every group of permanent magnet connected superimposed the composition by two plane projection areas, volume, high energy product annular ferrite permanent-magnet iron that magnetic property is identical.The thickness of each annular ferrite permanent-magnet iron and shaft hole diameter all equate, corresponding with these axis holes mate be arranged on upper magnet yoke 903 in addition
AOn 8 through holes 9061 and be arranged on lower yoke 903
BOn 8 corresponding screws 9071 (this figure omit do not paint), utilize 8 non-magnetic conduction securing members 9000 (for example brass screw) to upper magnet yoke 903
A, lower yoke 903
BApply well-balanced static pressure in advance and make it connect to the outer core of as a whole magnetic circuit with the identical pole-face 900 of 8 groups of annular permanent magnets that are superimposed together.With the recessed position mating surface 933 of core setting-in outside the above-mentioned magnetic circuit, rely on the binding agent 001 of coating in advance from the outside of framework 901, the vertical side face of gabarit and the lower yoke 903 of the outer core of described magnetic circuit to framework 901
BOuter side plane 90300
BAnnular flat table top 9110 with recessed position mating surface 933 of framework and framework is bonded to as a whole respectively.Cylinder shape magnetic 913 suits are positioned on the convex column 912 of framework 901 inner concave platform faces 911 axis parts, and by coaxial symmetrically arranged inner concave platform face 911 bonding location ... thus, upper magnet yoke 903
AWith lower yoke 903
BThe inboard vertical plane of central axis hole 910 and the outer peripheral face of cylinder shape magnetic 913 between constitute two well-balanced annular magnetic gaps 910 up and down
AWith 910
BBe wound with two independently coils 909 on the coil rack 907 cylindraceous
AWith 909
B, elastic damping plate 941, vibrating diaphragm 906 bond together with coil rack 907.Structure, operation principle and the implementation result of all the other relevant magnetic circuits, identical with the related description of the embodiment of the invention 2, embodiment 1, present embodiment no longer is repeated in this description.
Fig. 9 shows the magnetic circuit A-A flat sectional drawing of the embodiment of the invention 7.
The upper magnet yoke 903 of loud speaker
A, lower yoke 903
BIt is the circular flat board that two blocks of coaxial symmetrically arranged magnetic materials are made, its central part is provided with a central axis hole 910, peripheral position along central axis hole evenly is provided with 8 through holes 9061 (upper magnet yoke) and 8 screws 9071 (lower yoke), and the central angle of its adjacent two through holes or screw axial line is 45 degree angles.8 groups of annular permanent magnets that mate with through hole 9061 and screw 9071 are distributed between the interior wide pole-face 900 of upper and lower yoke, also are provided with heat radiation convection current air flue 917 between the two adjacent groups permanent magnet.All the other are partly identical and no longer be repeated in this description with the structure of the embodiment of the invention 1, embodiment 2 and operation principle.
In order to improve the result of ventilating heat dissipation of loud speaker, on the described cylinder body wall of framework 901, ventilating opening or grid with convection current air flue 917 corresponding couplings can be set also, because this is known prior art, present embodiment is no longer drawn and is indicated and described.
Undoubtedly, described carriage and cylinder shape magnetic that core and Fig. 1 embodiment 1 outside the described magnetic circuit of present embodiment regulation provide are combined, simultaneously at described upper magnet yoke 903
AOutside flat surface 90300
AThe traditional transducer framework (for example the taper basin frame of loud speaker or hemisphere are risen the sound diaphragm of loudspeaker and supporting framework thereof) of last installation, the present invention will reconstitute some kinds and have circular dull and stereotyped electromechanical transducers.
Figure 10 shows the electromechanical transducer circuit theory winding diagram that the present invention has resistance load characteristics.
Present embodiment is that example is set forth and simultaneously referring to the related description of Fig. 1 and Fig. 2 with the embodiment of the invention shown in Fig. 11.The setting prerequisite of present embodiment is: symmetrically arranged transducer upper magnet yoke 103
AWith lower yoke 103
BHave identical material and geometry; Two described annular magnetic gaps 110
AWith 110
BGeometry and magnetic induction density B
rValue equates: two coils 109
AWith 109
BAround to opposite (coil for clockwise around to, another coil be counter-clockwise around to); The enamelled wire cross-sectional area of two coils equates; The equal turn numbers n of two coils
A=n
B: the inductance value absolute value of two coils is equal | L
109A|=| L
109B|.Be horizontal symmetry axis (please be simultaneously shown in Figure 1) promptly referring to the present invention with 1/2nd bisector X-X lines of described permanent magnet 102 axial heights, described transducer have a pair of aspect geometry and magnetic property laterally zygomorphic work magnetic circuit.
According to the regulation principle of Lorentz force, with coil 109
ATail end Y
AWith coil 109
BHead end X
BBe connected in series coil 109
AHead end X
AWith coil 109
BTail end Y
BConstitute a pair of signal input terminal of described transducer.Because two coils 109
AWith 109
BBe operated in the same flux loop, their inductance vector is to cancel each other in 180 degree angles because of phase difference, but the electric power F=F of coil
109A+ F
109B, therefore, described transducer has resistance load characteristics (or being similar to resistance load characteristics), and (or basic elimination) eliminated in the phase distortion of transducer.
Undoubtedly, the setting principle of the circuit theory winding diagram of present embodiment and symmetrical magnetic circuits is equally applicable to unshowned all embodiment of Buddhist monk that the present invention has illustrated.As long as permutation and combination by various magnetic circuit and circuit, common professional and technical personnel only need just can obtain electromechanical transducer various different structure forms, that have resistance load characteristics according to disclosed technical characterictic of the present invention and embodiment.
Figure 11 shows the carriage plane graph of the embodiment of the invention 1.
Described carriage has an axis hole 188, be provided with a coaxial circular inner concave platform face 1118 in the outside of axis hole 188, be provided with a coaxial annular groove 1630 in the outside of inner concave platform face 1118, on the base plane 16300 of groove, be provided with 8 uniform carriage pores 182, when described coil rack 107 up-down vibration of described transducer, pore 182 has played the air bag damping action that reduces coil rack simultaneously and has improved the double effects of coil ventilation and heat.Be provided with coaxial carriage mounting plane 1800 in the outside of annular groove 1630, it is level and smooth and a lower yoke outside flat surface 10300
BThe circular mounting plane that coincide which is provided with 4 uniform through holes 187, by screw carriage 181 is fixed on the lower yoke.Details can no longer be repeated in this description referring to the related description of Fig. 1 embodiment 1.
Undoubtedly, the carriage 281......981 identical with present embodiment all can match each other with any transducer magnetic structure provided by the invention and be combined into various types of transducer drivers.
Figure 12 shows flat, the elevation of driver that the embodiment of the invention 1 has sheath.
In the present embodiment, driver sheath 137 is made of two semicircular arc plastics sections, in the sheath wide surface 138 coating binding agents 001 and with upper magnet yoke 103
A, lower yoke 103
B, permanent magnet 102 the gabarit vertical plane coincide mutually and bonding fixing.In order to cooperate magnetic structure pattern shown in Figure 1 and to improve the result of ventilating heat dissipation of transducer, the ventilating opening 140 of two rectangles is set on every section sheath 137, they be arranged on upper and lower yoke periphery pole shoe 129
AWith 129
BOn the corresponding coupling of described convection current pore 117.The faying face place of two sections sheaths also is coated with binding agent 001.When arrow Fin represents to assemble transducer driver sheath is applied the direction of static pressure.
Remainder sees also the related description of the embodiment of the invention 1, embodiment 2 and element of the present invention and the tabulation of label corresponding relation and no longer is repeated in this description.
Undoubtedly, the driver sheath 237......837 identical with present embodiment all can match each other with any transducer magnetic structure provided by the invention and be combined into various types of transducer drivers.
Figure 13 shows flat, the elevation of driver that the embodiment of the invention 2 has sheath.
It has foursquare yoke and has embodiment 4 magnetic structure pattern shown in Figure 5 simultaneously.Present embodiment driver sheath is made of the sheath 237 of 4 sections strips.The interior wide face of sheath and the faying face place of adjacent segment sheath all are coated with binding agent, when arrow Fin is illustrated in the described driver of assembling the driver sheath are applied the direction of static pressure.For improving the result of ventilating heat dissipation of loud speaker, a sheath louvre 240 can also be set on every section sheath, the yoke convection current pore 517 shown in they and Fig. 5 embodiment 4 matches each other.
Remainder sees also the related description of the embodiment of the invention 1, embodiment 2 and element of the present invention and the tabulation of label corresponding relation and no longer is repeated in this description.
Figure 14 shows an embodiment plane graph of hollow frame of the present invention.
A foursquare hollow frame 504 is formed by non-magnet material die casting such as rigid plastics.Framework has a hollow frame external profile surface 534 that coincide and bond and fix with upper magnet yoke of the present invention and the interior wide face of lower yoke, position placed in the middle at external profile surface is provided with-individual outer vertical 522, the inboard vertical plane of it and described permanent magnet 502 coincide and bonding fixing.Straight smooth vertical in the structure space 563 of the upper and lower yoke of formation between the outer peripheral face of the cylinder shape magnetic of wide face 573 and described transducer or column magnetic.Remainder sees also related description and element of the present invention and the tabulation of label corresponding relation of the accompanying drawing 1 of the embodiment of the invention 1, embodiment 2 and Fig. 2, Fig. 5, Fig. 6 and no longer is repeated in this description.
Figure 15 shows another embodiment plane graph of hollow frame of the present invention.
This is the hollow frame 204 of an annular, can match each other with the embodiment of the invention 2 of Fig. 2.The corresponding relation of each element and label sees also the related description of embodiment 2 Fig. 2 and no longer is repeated in this description.
Figure 16 shows the embodiment floor map that the present invention has the regular hexagon magnetic gap.
The column magnetic 113 of the transducer driver of present embodiment is a columnar iron with regular hexagonal cross section shape, and described upper magnet yoke and lower yoke axis hole 103 are that a regular hexagon axis hole that mates mutually with column magnetic 113 also constitutes a well-balanced regular hexagon annular magnetic gap 110 thus.Because regular hexagon has maximum peripheral length, so, transducer winding skeleton and regular hexagon coil (this figure all omits and do not paint) with regular hexagonal cross section are compared with the coil rack and the coil of other shape of cross section, can make described transducer obtain maximum Lorentz force and best radiating effect.By Ben Tu and Figure 17 as seen: be provided with the symmetrical circular line section 010 of a cutting back at the top of each regular hexagon interior angle, the both sides of this line segment and this interior angle are tangent, and its center of circle is then dropped on the angular bisector of this interior angle.
Figure 18 shows the flat facade node of the embodiment schematic diagram that the present invention has the column magnetic.
With Fig. 1 comparative control shown in the embodiment of the invention 1: a columned magnetic 113 ' has replaced the magnetic 113 of cylinder shape, and by a screw that passes described carriage axis hole 188 180 ' and binding agent 001 it is fixed on the inner concave platform face 1118 of carriage 181.The axis hole 110 of column magnetic 113 ' and upper magnet yoke and lower yoke constitutes the magnetic gap 110 of two annulars
A' and 110
B'.
Remainder sees also the related description of the embodiment of the invention 1, embodiment 2 and element of the present invention and the tabulation of label corresponding relation and no longer is repeated in this description.
It is to be noted at last: the cylinder shape magnetic and the column magnetic that utilize all the magnetic structure patterns shown in Fig. 1 to Fig. 9, different permanent magnet, different framework and carrier structure, varying cross-section shape, and different transducer winding connecting circuits, can permutation and combination become various dissimilar electromechanical transducers.Though the present invention can't enumerate out one by one with all these embodiment, but, no matter will above-mentioned technical characterictic of the present invention permutation and combination even make such or such local modification how, their overall technological scheme and design core content all can't surmount whole coverages that claim of the present invention and this specification have proposed.
Claims (18)
1, a kind of double-coil double-magnet gap transducer, comprise magnetic circuit and link the all-in-one-piece framework with it with permanent magnet, two coaxial isometrical annular magnetic gaps and a coil rack that inserts magnetic gap, wound in parallel electric wire insulated from each other and constitute two coils on it is characterized in that:
A. the upper magnet yoke of described magnetic circuit and lower yoke are the concave shaped flat boards that two coaxial installations and symmetrically arranged magnetic material are made, its outside central part is provided with a flat surface, the central part of described flat surface is provided with an axis hole, it is a circular hole normally, also can be a square or regular hexagon hole;
The inner peripheral position of b. described upper magnet yoke and lower yoke is provided with the peripheral pole shoe of projection, at the permanent magnet that is provided with the axial charging of uniform uniform thickness more than one or between the pole-face of two peripheral pole shoes;
C. the hollow frame made of non-magnet material be inlaid in described upper magnet yoke and lower yoke the concave shaped flat board interior wide face and bonding is fixing with it, the inboard vertical plane of described permanent magnet is fixing by the outer vertical installing and locating of described hollow frame and bonding;
D. two of described permanent magnet pole-faces and described two pole-faces going up magnetic gap and lower yoke periphery pole shoe directly coincide, and described identical pole-face is applied static pressure and make it to connect to the outer core of as a whole magnetic circuit by the securing member that is arranged on the through hole on described upper magnet yoke and the lower yoke flat surface, corresponding screw and non-magnet material making;
E. two coaxial isometrical annular magnetic gaps of formation between vertical side face with the outer peripheral face of dull and stereotyped coaxial mounted cylinder shape magnetic of central axis hole of described upper magnet yoke and lower yoke concave shaped or column magnetic and described upper magnet yoke and lower yoke central authorities axis hole, go into coaxial mounted two coils in described annular magnetic gap interpolation, two coils of regulation around to and the sense of current of flowing through coil, make described coil produce unidirectional electric power F in same work moment;
F. the bisector X-X line with described permanent magnet 1/2nd axial heights is a horizontal symmetry axis, described double-coil double-magnet gap transducer has two groups of laterally zygomorphic magnetic circuits aspect geometry and magnetic property, stipulate two described coils after being connected in series around to just opposite, the wire cross-section of two described coils is long-pending, the number of turn and inductance value absolute value are equal to each other, and described double-coil double-magnet gap transducer is an electromechanical transducer with resistance load characteristics;
The central axis hole of g. described coil and described concave shaped flat board and described cylinder shape magnetic or column magnetic mate mutually, its optimal cross-section is shaped as regular hexagon, the top of each hexagon interior angle or regular polygon interior angle is provided with the symmetrical circular line section of a cutting back, the both sides of this line segment and this interior angle are tangent respectively, and its center of circle is then dropped on the angular bisector of this interior angle;
Concave shaped convection current pore uniform more than two can also be set on the peripheral pole shoe of h. described upper magnet yoke and lower yoke, equal when the bottom of this pore is the darkest with the interior wide bottom surface of described concave shaped flat board;
I. the core outside described magnetic circuit of the binding agent between described upper magnet yoke and lower yoke and described permanent magnet and the described hollow frame solidifies the location after all assembling and finishing soon.
2, the double-coil double-magnet gap transducer of stipulating according to claim 1, it is characterized in that: described upper magnet yoke and lower yoke are the concave shaped flat boards of two circles, and described permanent magnet is a circular permanent magnet or fan shape or a disk shape or the ring plate shape rare-earth permanent magnet that above uniform thickness is uniform.
3, according to the double-coil double-magnet gap transducer of claim 1 regulation, it is characterized in that: described upper magnet yoke and lower yoke are the concave shaped flat boards of two regular polygons, and described permanent magnet is the uniform strip rare-earth permanent magnets of three or more uniform thickness.
4, according to the double-coil double-magnet gap transducer of claim 1 regulation, it is characterized in that: described upper magnet yoke and lower yoke are the concave shaped flat boards of two rectangles, and described permanent magnet is four strip rare-earth permanent magnets that uniform thickness is uniform.
5, the double-coil double-magnet gap transducer of stipulating according to claim 1, it is characterized in that: around the vertical external profile surface of described upper magnet yoke and lower yoke and described permanent magnet, be provided with more than two sections or two sections in the driver sheath of making of non-magnet material closely is wrapped in it, the interior wide face of described driver sheath is identical each other with the vertical external profile surface of described yoke and described permanent magnet and be bonded to as a whole magnetic circuit; The carriage that non-magnetic conduction rigid material is made, its central part is provided with an axis hole, central axial line with described axis hole is a symmetry axis, be provided with an inner concave platform face in the outside of axis hole, be provided with a coaxial annular groove in the outside of described inner concave platform face, be provided with coaxial and a described lower yoke outside flat surface fixing carriage mounting plane that coincide in the outside of described annular groove, the securing member that coaxial mounted cylinder shape magnetic or column magnetic are made by one group of non-magnet material is fixed on the axis part of described inner concave platform face, constitute two coaxial isometrical annular magnetic gaps between the vertical side face of the outer peripheral face of described cylinder shape magnetic or column magnetic and described upper magnet yoke and lower yoke central authorities axis hole, constitute a complete double-coil double-magnet gap transducer driver magnetic circuit thus.
6, double-coil double-magnet gap transducer according to claim 1 regulation, it is characterized in that: a coaxial framework that links together with described magnetic circuit, the waist of described framework is provided with a coaxial uncovered cylinder, the tube end inner side plane of described cylinder is provided with a coaxial annular groove, the inboard of described annular groove and the outside are respectively equipped with two coaxial annular flat table tops, the axis part of that annular flat table top placed in the middle is provided with the convex column that a non-magnetic conduction rigid material is made, described cylinder shape magnetic is sleeved on the described convex column, in the cylinder shape web that non-magnet material is made closely is wrapped in the vertical external profile surface of described upper magnet yoke and lower yoke and bonding fixing, with link the outer core of the described magnetic circuit of all-in-one-piece embed described framework described cylinder inboard mating surface and be bonded to as a whole with described framework.
7, a kind of double-coil double-magnet gap transducer, comprise magnetic circuit and link the all-in-one-piece framework with it with permanent magnet, two coaxial isometrical annular magnetic gaps and a coil rack that inserts magnetic gap, wound in parallel electric wire insulated from each other and constitute two coils on it is characterized in that:
A. the upper magnet yoke of described magnetic circuit and lower yoke are the concave shaped flat boards that two coaxial installations and symmetrically arranged magnetic material are made, its outside central part is provided with a flat surface, the central part of described flat surface is provided with an axis hole, it is a circular hole normally, also can be a square or regular hexagon hole;
The inner peripheral position of b. described upper magnet yoke and lower yoke is provided with the peripheral pole shoe of projection, at the permanent magnet that is provided with the axial charging of uniform uniform thickness more than one or between the pole-face of two peripheral pole shoes;
C. the hollow frame made of non-magnet material be inlaid in described upper magnet yoke and lower yoke the concave shaped flat board interior wide face and bonding is fixing with it, the inboard vertical plane of described permanent magnet is fixing by the outer vertical installing and locating of described hollow frame and bonding;
D. two of described permanent magnet pole-faces and described two pole-faces going up magnetic gap and lower yoke periphery pole shoe directly coincide, and described identical pole-face is applied static pressure and make it to connect to the outer core of as a whole magnetic circuit by the securing member that is arranged on the through hole on described upper magnet yoke and the lower yoke flat surface, corresponding screw and non-magnet material making;
E. two coaxial isometrical annular magnetic gaps of formation between vertical side face with the outer peripheral face of dull and stereotyped coaxial mounted cylinder shape magnetic of central axis hole of described upper magnet yoke and lower yoke concave shaped or column magnetic and described upper magnet yoke and lower yoke central authorities axis hole, go into coaxial mounted two coils in described annular magnetic gap interpolation, two coils of regulation around to and the sense of current of flowing through coil, make described coil produce unidirectional electric power F in same work moment;
The central axis hole of f. described coil and described concave shaped flat board and described cylinder shape magnetic or column magnetic mate mutually, its optimal cross-section is shaped as regular hexagon, the top of each hexagon interior angle or regular polygon interior angle is provided with the symmetrical circular line section of a cutting back, the both sides of this line segment and this interior angle are tangent respectively, and its center of circle is then dropped on the angular bisector of this interior angle;
Concave shaped convection current pore uniform more than two can also be set on the peripheral pole shoe of g. described upper magnet yoke and lower yoke, equal when the bottom of this pore is the darkest with the interior wide bottom surface of described concave shaped flat board;
H. the core outside described magnetic circuit of the binding agent between described upper magnet yoke and lower yoke and described permanent magnet and the described hollow frame solidifies the location after all assembling and finishing soon.
8, the double-coil double-magnet gap transducer of stipulating according to claim 7, it is characterized in that: described upper magnet yoke and lower yoke are the concave shaped flat boards of two circles, and described permanent magnet is a circular permanent magnet or fan shape or a disk shape or the ring plate shape rare-earth permanent magnet that above uniform thickness is uniform.
9, according to the double-coil double-magnet gap transducer of claim 7 regulation, it is characterized in that: described upper magnet yoke and lower yoke are the concave shaped flat boards of two regular polygons, and described permanent magnet is the uniform strip rare-earth permanent magnets of three or more uniform thickness.
10, according to the double-coil double-magnet gap transducer of claim 7 regulation, it is characterized in that: described upper magnet yoke and lower yoke are the concave shaped flat boards of two rectangles, and described permanent magnet is four strip rare-earth permanent magnets that uniform thickness is uniform.
11, the double-coil double-magnet gap transducer of stipulating according to claim 7, it is characterized in that: around the vertical external profile surface of described upper magnet yoke and lower yoke and described permanent magnet, be provided with more than two sections or two sections in the driver sheath of making of non-magnet material closely is wrapped in it, the interior wide face of described driver sheath is identical each other with the vertical external profile surface of described yoke and described permanent magnet and be bonded to as a whole magnetic circuit; The carriage that non-magnetic conduction rigid material is made, its central part is provided with an axis hole, central axial line with described axis hole is a symmetry axis, be provided with an inner concave platform face in the outside of axis hole, be provided with a coaxial annular groove in the outside of described inner concave platform face, be provided with coaxial and a described lower yoke outside flat surface fixing carriage mounting plane that coincide in the outside of described annular groove, the securing member that coaxial mounted cylinder shape magnetic or column magnetic are made by one group of non-magnet material is fixed on the axis part of described inner concave platform face, constitute two coaxial isometrical annular magnetic gaps between the vertical side face of the outer peripheral face of described cylinder shape magnetic or column magnetic and described upper magnet yoke and lower yoke central authorities axis hole, constitute a complete double-coil double-magnet gap transducer driver magnetic circuit thus.
12, double-coil double-magnet gap transducer according to claim 7 regulation, it is characterized in that: a coaxial framework that links together with described magnetic circuit, the waist of described framework is provided with a coaxial uncovered cylinder, the tube end inner side plane of described cylinder is provided with a coaxial annular groove, the inboard of described annular groove and the outside are respectively equipped with two coaxial annular flat table tops, the axis part of that annular flat table top placed in the middle is provided with the convex column that a non-magnetic conduction rigid material is made, described cylinder shape magnetic is sleeved on the described convex column, in the cylinder shape web that non-magnet material is made closely is wrapped in the vertical external profile surface of described upper magnet yoke and lower yoke and bonding fixing, with link the outer core of the described magnetic circuit of all-in-one-piece embed described framework described cylinder inboard mating surface and be bonded to as a whole with described framework.
13, a kind of double-coil double-magnet gap transducer, comprise magnetic circuit and link the all-in-one-piece framework with it with permanent magnet, two coaxial isometrical annular magnetic gaps and a coil rack that inserts magnetic gap, wound in parallel electric wire insulated from each other and constitute two coils on it is characterized in that:
A. the upper magnet yoke of described magnetic circuit and lower yoke are the circular flat boards that two coaxial installations and symmetrically arranged magnetic material are made, and described circular dull and stereotyped central part is provided with an axis hole, and it is a circular hole normally, also can be a square or regular hexagon hole;
B., the permanent magnet of uniform uniform thickness more than three groups or three groups is set at the outer periphery position of described upper magnet yoke and lower yoke central authorities axis hole, every group of permanent magnet is made up of two blocks of superimposed annular permanent magnets of series connection of axial charging, four pole-faces of every group of permanent magnet and described to go up in magnetic gap and lower yoke two wide pole-face all directly identical are by being arranged on the through hole that is positioned at every group of annular permanent magnet axis part on described upper magnet yoke and the lower yoke, corresponding screw and non-magnet material securing member apply static pressure to the identical pole-face of every group of permanent magnet and make it and described upper magnet yoke and lower yoke connect to as a whole magnetic circuit core outward;
C. two coaxial isometrical annular magnetic gaps of formation between vertical side face with the outer peripheral face of described upper magnet yoke and lower yoke central authorities' coaxial mounted cylinder shape magnetic of axis hole or column magnetic and the central axis hole of described upper magnet yoke and lower yoke, go into coaxial mounted two coils in described annular magnetic gap interpolation, two coils of regulation around to and the sense of current of flowing through coil, make described coil produce unidirectional electric power F in same work moment;
D. the bisector X-X line with described permanent magnet 1/2nd axial heights is a horizontal symmetry axis, described electromechanical transducer has two groups of laterally zygomorphic magnetic circuits aspect geometry and magnetic property, stipulate two described coils after being connected in series around to just opposite, the wire cross-section of two described coils is long-pending, the number of turn and inductance value absolute value are equal to each other, and described double-coil double-magnet gap transducer is an electromechanical transducer with resistance load characteristics;
E. described coil and described circular dull and stereotyped central axis hole and described cylinder shape magnetic or column magnetic mate mutually, its optimal cross-section is shaped as regular hexagon, the top of each hexagon interior angle or regular polygon interior angle is provided with the symmetrical circular line section of a cutting back, the both sides of this line segment and this interior angle are tangent respectively, and its center of circle is then dropped on the angular bisector of this interior angle;
Be provided with the space between the external profile surface of every group of f. uniform described permanent magnet, constitute the heat loss through convection air flue of double-coil double-magnet gap transducer driver thus.
14, double-coil double-magnet gap transducer according to claim 13 regulation, it is characterized in that: the carriage that non-magnetic conduction rigid material is made, its central part is provided with an axis hole, be provided with a coaxial inner concave platform face in the outside of described axis hole, be provided with a coaxial annular groove in the outside of described inner concave platform face, be provided with coaxial and a described lower yoke outside flat surface fixing carriage mounting plane that coincide in the outside of described annular groove, the securing member that coaxial mounted cylinder shape magnetic or column magnetic are made by one group of non-magnet material is fixed on the axis part of described inner concave platform face, constitute two coaxial isometrical annular magnetic gaps between the vertical side face of central axis hole of the outer peripheral face of described cylinder shape magnetic or column magnetic and described upper magnet yoke and lower yoke, constitute a complete double-coil double-magnet gap transducer driver magnetic circuit thus.
15, double-coil double-magnet gap transducer according to claim 13 regulation, it is characterized in that: a coaxial framework that links together with described magnetic circuit, the waist of described framework is provided with a coaxial uncovered cylinder, the tube end inner side plane of described cylinder is provided with a coaxial annular groove, the inboard of described annular groove and the outside are respectively equipped with two coaxial annular flat table tops, the axis part of that annular flat table top placed in the middle is provided with the convex column that a non-magnetic conduction rigid material is made, described cylinder shape magnetic is sleeved on the described convex column, with link the outer core of the described magnetic circuit of all-in-one-piece embed described framework described cylinder inboard mating surface and be bonded to as a whole with described framework.
16, a kind of double-coil double-magnet gap transducer, comprise magnetic circuit and link the all-in-one-piece framework with it with permanent magnet, two coaxial isometrical annular magnetic gaps and a coil rack that inserts magnetic gap, wound in parallel electric wire insulated from each other and constitute two coils on it is characterized in that:
A. the upper magnet yoke of described magnetic circuit and lower yoke are the circular flat boards that two coaxial installations and symmetrically arranged magnetic material are made, and described circular dull and stereotyped central part is provided with an axis hole, and it is a circular hole normally, also can be a square or regular hexagon hole;
B., the permanent magnet of uniform uniform thickness more than three groups or three groups is set at the outer periphery position of described upper magnet yoke and lower yoke central authorities axis hole, every group of permanent magnet is made up of two blocks of superimposed annular permanent magnets of series connection of axial charging, four pole-faces of every group of permanent magnet and described to go up in magnetic gap and lower yoke two wide pole-face all directly identical are by being arranged on the through hole that is positioned at every group of annular permanent magnet axis part on described upper magnet yoke and the lower yoke, corresponding screw and non-magnet material securing member apply static pressure to the identical pole-face of every group of permanent magnet and make it and described upper magnet yoke and lower yoke connect to as a whole magnetic circuit core outward;
C. two coaxial isometrical annular magnetic gaps of formation between vertical side face with the outer peripheral face of described upper magnet yoke and lower yoke central authorities' coaxial mounted cylinder shape magnetic of axis hole or column magnetic and the central axis hole of described upper magnet yoke and lower yoke, go into coaxial mounted two coils in described annular magnetic gap interpolation, two coils of regulation around to and the sense of current of flowing through coil, make described coil produce unidirectional electric power F in same work moment;
D. described coil and described circular dull and stereotyped central axis hole and described cylinder shape magnetic or column magnetic mate mutually, its optimal cross-section is shaped as regular hexagon, the top of each hexagon interior angle or regular polygon interior angle is provided with the symmetrical circular line section of a cutting back, the both sides of this line segment and this interior angle are tangent respectively, and its center of circle is then dropped on the angular bisector of this interior angle;
Be provided with the space between the external profile surface of every group of e. uniform described permanent magnet, constitute the heat loss through convection air flue of double-coil double-magnet gap transducer driver thus.
17, double-coil double-magnet gap transducer according to claim 16 regulation, it is characterized in that: the carriage that non-magnetic conduction rigid material is made, its central part is provided with an axis hole, be provided with a coaxial inner concave platform face in the outside of described axis hole, be provided with a coaxial annular groove in the outside of described inner concave platform face, be provided with coaxial and a described lower yoke outside flat surface fixing carriage mounting plane that coincide in the outside of described annular groove, the securing member that coaxial mounted cylinder shape magnetic or column magnetic are made by one group of non-magnet material is fixed on the axis part of described inner concave platform face, constitute two coaxial isometrical annular magnetic gaps between the vertical side face of central axis hole of the outer peripheral face of described cylinder shape magnetic or column magnetic and described upper magnet yoke and lower yoke, constitute a complete double-coil double-magnet gap transducer driver magnetic circuit thus.
18, double-coil double-magnet gap transducer according to claim 16 regulation, it is characterized in that: a coaxial framework that links together with described magnetic circuit, the waist of described framework is provided with a coaxial uncovered cylinder, the tube end inner side plane of described cylinder is provided with a coaxial annular groove, the inboard of described annular groove and the outside are respectively equipped with two coaxial annular flat table tops, the axis part of that annular flat table top placed in the middle is provided with the convex column that a non-magnetic conduction rigid material is made, described cylinder shape magnetic is sleeved on the described convex column, with link the outer core of the described magnetic circuit of all-in-one-piece embed described framework described cylinder inboard mating surface and be bonded to as a whole with described framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00122197 CN1119918C (en) | 1999-08-20 | 2000-08-18 | Double-coil double-magnet gap transducer |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99232403 | 1999-08-20 | ||
| CN99232403.3 | 1999-08-20 | ||
| CN00222791.6 | 2000-04-14 | ||
| CN00222791 | 2000-04-14 | ||
| CN 00122197 CN1119918C (en) | 1999-08-20 | 2000-08-18 | Double-coil double-magnet gap transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1285706A CN1285706A (en) | 2001-02-28 |
| CN1119918C true CN1119918C (en) | 2003-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00122197 Expired - Fee Related CN1119918C (en) | 1999-08-20 | 2000-08-18 | Double-coil double-magnet gap transducer |
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| Country | Link |
|---|---|
| CN (1) | CN1119918C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050099255A1 (en) * | 2000-08-18 | 2005-05-12 | Fan Zhang | Transducer with dual coil and dual magnetic gap |
| CN101321409B (en) * | 2007-06-06 | 2011-11-30 | 葛锦明 | Double magnetic circuit two-tone ring plate loudspeaker |
| CN101711008B (en) * | 2007-10-13 | 2013-03-27 | 张凡 | Multimedia sound system with audio digital interface |
| US9294843B2 (en) | 2007-10-13 | 2016-03-22 | Fan Zhang | Multimedia acoustics system having audio frequency digital interface |
| CN102256196B (en) * | 2011-01-26 | 2015-06-03 | 歌尔声学股份有限公司 | Micro moving-coil electroacoustic transducer and assembling method thereof |
| TWI599242B (en) * | 2011-07-21 | 2017-09-11 | Multi-drive transducer with symmetrical magnetic circuit and symmetrical coil circuit | |
| CN108600920A (en) * | 2018-01-08 | 2018-09-28 | 深圳市韶音科技有限公司 | a kind of bone-conduction speaker |
| CN107948882A (en) * | 2018-01-08 | 2018-04-20 | 深圳市韶音科技有限公司 | A kind of bone-conduction speaker |
| CN114979911B (en) * | 2022-07-29 | 2023-03-14 | 歌尔股份有限公司 | Sound production device and electronic equipment |
-
2000
- 2000-08-18 CN CN 00122197 patent/CN1119918C/en not_active Expired - Fee Related
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|---|---|
| CN1285706A (en) | 2001-02-28 |
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