WO1999031931A1

WO1999031931A1 - Loudspeaker

Info

Publication number: WO1999031931A1
Application number: PCT/CN1998/000306
Authority: WO
Inventors: Fan Zhang
Original assignee: Fan Zhang
Priority date: 1997-12-12
Filing date: 1998-12-11
Publication date: 1999-06-24
Also published as: CN1278399A; CN1219834A; AU1481299A

Abstract

This invention relates to a loudspeaker. One or more than one pair of repulsive magnets are mounted on both sides of a flat, another respective flat is mounted across the polar plane of said magnet, thereby three or more magnet gaps are formed between the surfaces of said three or more flats and the surfaces of coaxially installed ring-shaped magnet bodies. A voice coil is inserted in said magnet gaps, the winding direction of the voice coil and direction of a current which flows through the voice coil are prescribed to make said voice coil produce electromotive force with same direction at the same work instant. When said loudspeaker has a pair of repulsive magnets whose magnet characteristic is fully symmetric and repulsive magnet circuits, by setting the number of turns, inductance, and connection way of the voice coil, said loudspeaker has a pure resistance load characteristic.

Description

Speaker technology field

The present invention relates to a loudspeaker, in particular to an electric loudspeaker with a pair or more of repulsive permanent magnets, and belongs to the field of electric electroacoustic sensors.

In the prior art, CN95101020.4 provides several types of ring magnetic cores and a ring of rare-earth metal bonded permanent magnets that are coaxially mounted directly into a speaker magnetic circuit, and two magnetic gaps in the magnetic circuit. A new technical solution that inserts two voice coils and specifies the current direction of the voice coils so that each voice coil generates electric force in the same direction. Due to the maximum magnetic energy product (BH) _{max of} rare earth metal bonded magnets such as neodymium-iron-boron series bonded magnets, generally it does not exceed 80 KJ / m ³ in industrial applications. Therefore, its main disadvantages are: low magnetic induction and low sensitivity of the speaker. The American JBL company adopted another new technical solution: one set of ring-shaped magnetic core and another set of one NdFeB magnet and two flat yoke irons (both the magnet and the yoke iron are provided with a central shaft hole) coaxial After installation, the speaker magnetic circuit is directly combined, and two voice coils are inserted into the two magnetic gaps of the magnetic circuit. The direction of the current flowing through the voice coil is to cause each voice coil to generate an electric force in the same direction and make the two voice coils The number of turns is equal and the inductance is reversely canceled, so that a speaker with pure resistive load characteristics is prepared. Its main disadvantages are: The sensitivity is still low, and it does not change much compared with the traditional speakers of the same caliber.

Summary of the Invention

The first object of the present invention is to overcome the shortcomings of the prior art and provide several high-fidelity speakers with different structural types and three or more magnetic gaps, so that the electro-acoustic conversion efficiency of the speakers is greatly improved, and Has a wide product coverage.

A second object of the present invention is to provide a high-fidelity speaker with pure resistive load characteristics or approximately pure resistive load characteristics with several different structural types and three magnetic gaps, so that the electro-acoustic conversion efficiency of the speakers is greatly improved, and Has a wide product coverage.

A third object of the present invention is to provide a high-fidelity speaker with pure resistive load characteristics or approximate pure resistive load characteristics with several different structural types and three magnetic gaps. The eddy current in the magnetic circuit of the loudspeaker is maximized. The reduction of the distortion, the distortion is significantly reduced, but the electro-acoustic conversion efficiency is greatly improved, and it has a wide product coverage.

The object of the present invention is achieved as follows:

A loudspeaker includes a magnetic circuit and a basin frame made of rigid material integrated with the magnetic circuit, a diaphragm and a fixed core support piece installed in the basin frame, and a cylindrical skeleton connected to the diaphragm and the fixed core support piece. A voice coil that is wound with parallel insulated wires in parallel and forms a magnetic gap inserted into the magnetic circuit is characterized in that a set of permanent magnets that are magnetically polarized in the thickness direction are installed on the planes of both sides of a flat plate made of magnetic material. The permanent magnets have the same polarity on the side close to the flat plate, and a flat plate made of magnetic material is installed on the outer plane of the permanent magnet, respectively. A magnet, the three or more coaxially-mounted flat plates have the same projection area and project three or more symmetrically outwardly from the projection plane of the coaxially-mounted pair or permanent magnets A lip, between the inner peripheral surface of a ring-shaped cylindrical magnetic body mounted coaxially with the flat plate and the permanent magnet, and the outer peripheral surface of the outer convex lip of the flat plate constitute three or more of the magnets. Gap in the magnetic The insertion of the voice coil mounted coaxially, said predetermined voice coil winding direction and current flowing through the voice coil causing the voice coil to generate the same page replacement (Rule 26) working at the same instant Electric force F in one direction, a bottom portion of the shaft center of the basin frame is provided with a raised convex platform, and the outer peripheral surface of the ring-shaped cylindrical magnetic body is fitted to the basin matching the convex platform surface The recessed part of the rack is inside of the recessed part and is connected with the basin rack as a whole. The flat plate is a circular flat plate with a central shaft hole, and the permanent magnet is a disc-shaped magnet with a central shaft hole or a combined magnet assembled by a plurality of fan-shaped sheets or a plurality of ring magnets. A shaft hole is provided at an axial center portion of the convex platform surface of the basin frame, and the flat plate and the permanent magnet are stacked on the convex platform surface by matching a pair of fasteners made of non-magnetic conductive material. Alternatively, a flat plate and the permanent magnet are superimposed on the inwardly convex platform surface by using an inwardly convex cylindrical body which is integrally die-cast with the basin frame and located at the axial center portion of the inwardly convex platform surface. The gap formed by the fastener or the convex cylindrical body and the central axis hole of the flat plate and the permanent magnet is filled with an adhesive to prevent the flat plate or the permanent magnet from being eccentrically displaced and the The flat plate and the permanent magnet are connected with the basin frame into a whole. The flat plate is a circular flat plate, the permanent magnet is a disc-shaped magnet or a combined magnet formed by assembling a plurality of fan-shaped sheets, the flat plate, the permanent magnet and the inward protrusion of the basin frame The platform surface and the innermost piece of the plate are bonded by means of bonding or by inserting a uniformly made non-magnetic material on the radially outwardly protruding lip of the plate to connect the plate and the permanent magnet to the substrate. The basin stand is connected as a whole.

A loudspeaker includes a magnetic circuit and a basin frame made of rigid material integrated with the magnetic circuit, a diaphragm and a fixed core support piece installed in the basin frame, and a cylindrical skeleton connected to the diaphragm and the fixed core support piece. A voice coil that is wound in parallel with insulated wires and forms a magnetic gap inserted into a magnetic circuit is characterized in that a set of columnar rare earth metal bonded permanent magnets are respectively installed on the planes of both sides of a flat plate made of magnetic material. The permanent magnet is magnetically polarized by a cylindrical horizontal base facing the vertical peripheral surface of the radially outward convex lip located at the upper end and has the same polarity on the side of the base immediately adjacent to the flat plate, ... thus forming a pair or one For the above repulsive magnets, the flat plate coaxially mounted and the radially outward convex lip of the upper end of the permanent magnet have the same projection area, and are more than the projection planes of the two sets of the permanent magnet bases coaxially mounted. A shapely lip protrudes outward, an inner peripheral surface of a ring-shaped cylindrical magnetic body mounted coaxially with the flat plate and the permanent magnet, and a radially outward convex lip of the flat plate and an upper end of the permanent magnet. Radial outer lip Three or more of the magnetic gaps are formed between the outer peripheral surfaces of the magnetic coil, and coaxially mounted voice coils are inserted into the magnetic gaps, and the winding direction of the voice coils and the direction of the current flowing through the voice coils are defined so that The voice coil generates electric force F in the same direction at the same working instant, a shaft center portion at the bottom end of the basin frame is provided with a raised convex platform, and the outer peripheral surface of the ring-shaped cylindrical magnetic body is fitted with the The convex platform surface matches the inside of the recessed part of the basin frame and is connected with the basin frame as a whole. The flat plate is a circular flat plate with a central shaft hole, and the permanent magnet is a rare-earth metal bonded permanent magnet with a central shaft hole, which is provided at the axial center portion of the convex platform surface of the basin frame. A shaft hole is matched with a pair of fasteners made of a non-magnetic material, and the flat plate and the permanent magnet are stacked on the convex platform surface, or are located on the convex platform integrated with the basin frame by die-casting. An inwardly convex columnar body at the axial center portion of the inwardly convex platform surface, the flat plate and the permanent magnet are stacked on the inwardly convex platform surface, and the fastener or the inwardly convex columnar body and the The gap formed by the central axis hole of the flat plate and the permanent magnet is filled with an adhesive to prevent the flat plate or the permanent magnet from being eccentrically displaced and connect the flat plate and the permanent magnet to the basin frame into one. overall. The flat plate is a circular flat plate, the permanent magnet is a solid rare earth metal bonded permanent magnet, and the flat plate and the permanent magnet are connected to the convex platform of the basin frame by a bonding method. Become a whole.

A loudspeaker, ^ § «and ^ ^ integrated with; ^ ^ ^, ^ inner ffi¾¾ ^^, ^ ^ ^ wm, on which equal rights to pay women's and women's wires and constitute the insertion of the crane magnetic replacement page (the detailed rules (Article 26) A gap voice coil is characterized in that a set of ring-cylinder-shaped rare earth metal bonded permanent magnets are respectively mounted on the planes on both sides of a ring-shaped flat plate made of magnetic material, and the permanent magnets are located at the upper end by a ring-cylinder-shaped horizontal base facing. The radial inner convex lip of the part is magnetically polarized on the vertical peripheral surface and has the same polarity on the side close to the base of the flat plate, so as to form a pair or more of repulsive magnets, which are coaxially mounted. The inner edge of the flat plate has the same projection area as the radially inwardly protruding lip of the upper end of the permanent magnet, and is more symmetrically projected inwardly than the projection planes of the two sets of coaxially mounted permanent magnet bases. A lip, an outer peripheral surface of a ring-shaped cylindrical magnetic body mounted coaxially with the flat plate and the permanent magnet, an inner convex lip of the flat plate, and an inner circumference of the permanent lip that is radially inwardly convex at an upper end portion of the permanent magnet. Three or more of the magnetic gaps are formed between the surfaces, and a coaxially mounted voice coil is inserted into the magnetic gap, and the winding direction of the voice coil and the direction of the current flowing through the voice coil are specified so that the voice coil The circle generates electric force F in the same direction at the same working instant. A raised inwardly convex platform is provided at the bottom end portion of the basin frame, and the outer peripheral surfaces of the annular flat plate and the ring-shaped cylindrical permanent magnet are fitted into the recesses of the basin frame matching the inwardly convex platform surface. The inside of the part is connected with the basin frame as a whole. A shaft hole is provided at an axial center portion of the convex platform surface of the basin frame, and a pair of fasteners made of a non-magnetic material is used to mount the ring-shaped cylindrical magnetic body on the convex platform surface. Or using a convex cylindrical body located at the axial center of the convex platform surface integrally die-casting with the basin frame, embedding the ring-shaped cylindrical magnetic body on the convex platform surface, The gap formed by the fastener or the convex cylindrical body and the central shaft hole of the ring-shaped cylindrical magnetic body is filled with an adhesive to prevent the ring-shaped cylindrical magnetic body from being eccentrically displaced and displacing it with the The basin stand is connected as a whole. The toroidal magnetic body may also be a ferrite core.

A loudspeaker includes a magnetic circuit and a basin frame made of rigid material integrated with the magnetic circuit, a diaphragm and a fixed core support piece installed in the basin frame, and a cylindrical skeleton connected to the diaphragm and the fixed core support piece. A voice coil inserted into a magnetic circuit magnetic gap is wound in parallel on each other with insulated wires thereon, and is characterized in that three end portions and a middle portion of a ring-shaped cylindrical rare earth metal-bonded permanent magnet are provided with three symmetrical radial inner portions. Convex lips, the projection areas of the three convex lips are equal, and the vertical circumference of the two convex lips at the ends of both sides is magnetized and polarized by the vertical circumference of the middle convex lips, ... Thus, a pair or more of repulsive magnets are formed, an outer peripheral surface of a ring-shaped cylindrical magnetic body mounted coaxially with the permanent magnet, and an inner peripheral surface of the inner convex lip of the ring-shaped cylindrical permanent magnet. Three or more magnetic gaps are formed between them, a coaxially mounted voice coil is inserted into the magnetic gap, and the winding direction of the voice coil and the direction of the current flowing through the voice coil are specified so that the voice coil Generate the same direction electric force F at the same working instant, the axis of the basin frame An end portion is provided with an ascending convex platform, and the outer peripheral surface of the ring-shaped cylindrical permanent magnet is fitted on the inside of the recessed portion of the basin frame matching the convex platform surface and is connected with the basin frame to become A whole. A shaft hole is provided at an axial center portion of the convex platform surface of the basin frame, and a pair of fasteners made of a non-magnetic material is used to mount the ring-shaped cylindrical magnetic body on the convex platform surface. Or using a convex cylindrical body located at the axial center of the convex platform surface integrally die-casting with the basin frame, embedding the ring-shaped cylindrical magnetic body on the convex platform surface, The gap formed by the fastener or the convex cylindrical body and the central shaft hole of the ring-shaped cylindrical magnetic body is filled with an adhesive to prevent the ring-shaped cylindrical magnetic body from being eccentrically displaced and displacing it with the The basin stand is connected as a whole. The toroidal magnetic body may also be a ferrite core.

A loudspeaker includes a magnetic circuit and a basin frame made of rigid material integrated with the magnetic circuit, a diaphragm and a fixed core support piece installed in the basin frame, and a cylindrical skeleton connected to the diaphragm and the fixed core support piece. A voice coil inserted into a magnetic circuit magnetic gap is wound in parallel on the wires insulated from each other, and is characterized in that three side ends of the columnar rare earth metal bonded permanent magnet and a middle part thereof are provided with three radially outward convex lips Edge, the projection areas of the three convex lips are equal, and the peripheral lips of the middle convex surface face the replacement pages at the ends of both sides vertically (Article 26 of the detailed rules) The vertical circumferential surfaces of the two convex lip edges are magnetically polarized, ... thereby forming a pair or more of a pair of repulsive magnets, and the inner circumferential surface of the ring-shaped cylindrical magnetic body coaxially mounted with the permanent magnet and the aforementioned Three or more of the magnetic gaps are formed between the outer peripheral surfaces of the outer convex lip of the columnar permanent magnet, and a coaxially mounted voice coil is inserted into the magnetic gap, and the winding direction and The direction of the current flowing through the voice coil causes the voice coil to generate electric force F in the same direction at the same working instant. The bottom end of the shaft of the basin frame is provided with a rising convex platform, and the ring-shaped cylindrical magnetic body. The outer peripheral surface is fitted on the inside of the recessed portion of the basin frame matching the inwardly convex platform surface and is connected to the basin frame as a whole. When the permanent magnet is a solid columnar permanent magnet, a raised inwardly convex platform surface is provided at the bottom end portion of the basin frame, and the inwardly convex platform surface is adhered to the column bottom plane of the permanent magnet by bonding. The knotting method connects the permanent magnet and the basin frame into a whole. When the permanent magnet is a hollow cylindrical permanent magnet, a shaft hole is provided at an axial center portion of the inwardly convex platform surface of the basin frame, and a pair of fasteners made of a non-magnetically conductive material is used to connect the permanent magnet. A permanent magnet is installed on the convex platform surface, or an internal convex column-shaped body located at the axial center of the convex platform surface is integrally die-cast with the basin frame, and the permanent magnet is embedded in the convex platform. An adhesive is filled in a gap formed by the fastener or the convex cylindrical body and the central shaft hole of the permanent magnet on the convex platform surface to prevent the permanent magnet from eccentrically displacing and interfering with the permanent magnet. The basin frame is connected as a whole.

According to claim 1 or claim 4 or claim 7 or claim 10 or claim 13, said speaker has three of said magnetic gaps and forms a pair of fully symmetrical or A repulsive magnet and a repulsive magnetic circuit having approximately symmetrical magnetic properties. Three voice coils with the same cross-sectional area of the conductor are inserted into the magnetic gap. When the two voice coils W _A and voice coil W _c located on the outside depending on the direction from the outer-fitting diaphragm having a counterclockwise winding direction, centered W _B must have a voice coil wound clockwise direction, and vice versa, the trailing end of the voice coil Y _a W _a and W _B of the coil X _B series of head-end, the trailing end of the voice coil W _B Y _B of the end of the first coil W _c X _c in series, the voice coil W _c Y _c in the trailing end of said voice coil X _a head end of the voice coil constituting said w _a loudspeaker backbone vertical primer pair of input terminals, the voice coil \ ¥ and a voice coil W _c ^ and having equal inductance and equal number of turns 1 !! ^ And! ^, Setting the number of turns of the coil W _B n _B = n _A + while setting the voice coil \ _{¥] 3} the absolute value of the inductance _{_{IL B I = IL A I +}} IL c I, the speaker It is a speaker with pure resistive load characteristics or similar to pure resistive load characteristics.

According to claim 1 or claim 4 or claim 7 or claim 10 or claim 13, said speaker has three of said magnetic gaps and forms a pair of fully symmetrical or A repulsive magnet and a repulsive magnetic circuit having approximately symmetrical magnetic properties. Three voice coils with the same cross-sectional area of the conductor are inserted into the magnetic gap. When the two voice coils W _A ′ and ring W _e 'depending on the direction from the outer-fitting diaphragm having a counterclockwise winding direction, a center of the voice coil W _B' must have a clockwise winding direction, and vice versa, in the voice coil W _B '1 / A center tap Y _B 'is provided at two turns, and thus two parts of the voice coil W _B1 ' and a voice coil W _B2 'are formed, and the tail end Y _A ' of the voice coil W and the voice coil W _B1 'end of the first X _B1' connected in series, the voice coil W _e 'trailing end Y _e' and the voice coil W _B2 'end of the first X _B2' connected in series, the voice coil W _e 'of The leading end X _e ′ is vertically extended along the voice coil skeleton and connected to the common end Y of the voice coil W _B1 ′ and the voice coil W _B2 ′ after being connected in parallel with the leading end X _A 'of the voice coil W _A '. _B 'constituting the Young 'S pair of input terminals, the voice coil w _A 'and coil w _e' have equal number of turns n _A 'and n _c' and the equivalent inductance L _A 'and L _c', the voice coil W _B1 'and voice coil W _B2 ' have the same number of turns n _B1 'and n _B2 ' and equal inductances L _{B 1} 'and L _B2 ', and set the number of turns of the voice coil n _A '= n _c ' = n _B1 replacement page (Article 26) '= η _Β2 ' and at the same time set the absolute value of the inductance of the voice coil | L _B1 '| = | L _B2 ' | = | L _A '| = | L _C ' | Load characteristics or speakers that are approximately purely resistive.

According to claim 1 or claim 4 or claim 7 or claim 10 or claim 13, in order to increase the stability of the axial movement of the voice coil and prevent the "rubbing ring" failure, the basin frame It can be replaced by another combined basin frame, which is composed of a frame and a bottom basin assembly, and the frame is provided with the traditional diaphragm support surface and the traditional An open cylindrical body or a similar structure is provided at the bottom end portion of the center of the frame, and the inner wall of the cylindrical body forms the basin frame. A flange plate extending outward from the recessed portion and extending from the base portion of the recessed portion, a raised inner convex platform is provided at the axial center portion of the basin, and an open portion at the upper end of the basin The flange is extended to another outwardly protruding flange and correspondingly matches the flange of the frame. The inwardly convex platform is radially inwardly distributed with inwardly concave ribs and the method of the bottom basin. The blue plates are connected into one, An annular horizontal support surface is also provided at the junction between the strip and the flange, and the fixed core support of the lower end portion of the speaker voice coil skeleton is bonded to the frame and the basin through the one The flange is installed and positioned and connected as a whole.

Overview of the drawings

Drawing description:

Fig. 1 shows a longitudinal sectional view of a speaker according to the first embodiment of the present invention.

Fig. 2 shows a longitudinal sectional view of a speaker according to a second embodiment of the present invention.

Fig. 3 is a longitudinal sectional view showing a magnetic circuit of a speaker according to a third embodiment of the present invention.

Fig. 4 shows a longitudinal sectional view of a magnetic circuit of a speaker according to a fourth embodiment of the present invention.

Fig. 5 shows a longitudinal sectional view of a magnetic circuit of a speaker according to a fifth embodiment of the present invention.

Fig. 6 is a longitudinal sectional view showing a magnetic circuit of a speaker according to a sixth embodiment of the present invention.

Fig. 7 is a longitudinal sectional view showing a magnetic circuit of a speaker according to a seventh embodiment of the present invention.

Fig. 8 is a longitudinal sectional view of a speaker according to an eighth embodiment of the present invention.

Fig. 9 is a longitudinal sectional view of a speaker according to a ninth embodiment of the present invention.

Fig. 10 is a longitudinal sectional view showing a magnetic circuit of a speaker according to a tenth embodiment of the present invention.

Figure 11 shows a cross-sectional view of a magnetic circuit according to the first embodiment of the present invention.

Figure 12 shows a cross-sectional view of a magnetic circuit according to a second embodiment of the present invention.

Figure Π. Shows a cross-sectional view of a magnetic circuit according to the eighth embodiment of the present invention.

Figure 14 shows a cross-sectional view of a magnetic circuit according to a tenth embodiment of the present invention.

FIG. 15 shows a partially enlarged view of a node I in Embodiment 1 of the present invention.

FIG. 16 shows a partially enlarged view of the node II of the seventh embodiment (the tenth embodiment) of the present invention.

Figure 17 shows the magnetic circuit structure and circuit principle wiring diagram of the first embodiment of the speaker with purely resistive load characteristics of the present invention.

Figure 18. A magnetic circuit and circuit diagram showing a second embodiment of the present invention having a purely resistive load vocal horn! ¾ Wire Replacement Page (Details 26 糸) Illustration.

Fig. 19 shows a schematic longitudinal sectional view of an embodiment of a combined basin frame according to the present invention.

FIG. 20 shows a schematic diagram of installing and positioning the magnetic circuit core using non-magnetic material fasteners evenly distributed on the flat plate in the embodiment of the speaker of the present invention.

Fig. 21 is a longitudinal sectional view showing a magnetic circuit of a speaker according to Embodiment 11 of the present invention. The correspondence between the main elements and labels of the present invention is as follows −

101, 101, 201, 301, 401, 701, 801, 901, 1001, 1501, 1601, 1701 basin racks;

012, 12, 22, 32, 42, 82, 92, 1002, 1502, 1602, 1702-permanent magnets; 012 ', 012 ", 12', 22 ', 32', 42 ', 82', 92 ', 1002 ', 1702'-permanent magnets; 0110, 013, 13, 23, 33, 43, 83, 93, 1003, 1703-flat plates; 1763-ring flat plates;

015, 15, 25, 35, 45, 85, 95, 1005, 1505, 1605, 1705-dust cover;

016, 16, 26, 36, 46, 86, 96, 1006, 1506, 1606 — —— diaphragm;

017, 17, 27, 37, 47, 87, 97, 1017, 1507, 1607, 1707-voice coil skeletons;

018, 18, 28, 38, 48, 88, 98, 1008, 1508, 1608-centering brackets;

019, 19, 29, 39, 49, 89, 99, 1009, 1509, 1609, 1709-voice coils;

0110, 110, 210, 310, 410, 810, 910, 1010, 1510, 1610, 1710-magnetic gap;

0111, 111, 211, 311, 411, 811, 911, 1011, 1511, .1611, 1711-convex platform surface;

212, 412, 812, 1612, 1712-convex cylindrical body;

0113, 113, 213, 3 13, 413, 813, 913, 1013, 1513, 1613, 1713-ring-shaped cylindrical magnetic body;

214, 414, 814, 1614, 1714-central shaft holes;

0130, 130, 230, 330, 430, 930, 1030-Radially convex lips (flat);

1720-Radially convex lip (flat); 001-Adhesive;

320, 420, 820, 1520, 1620, 1720-radial outward convex lip (permanent magnet);

321, 421, 921, 1521, 1621, 1721, 32Γ, 42, 921 ', 1521', 1621 ', 1721'-the horizontal base surface of the permanent magnet;

0103, 103, 203, 303, 403, 803, 903, 1033, 1503, 1603, 1703 —— Basin mating surface of recessed part.

Best Mode of the Invention

The present invention is further described below with reference to the drawings and embodiments.

The cone-shaped pedestal frame 101 is made of a rigid material with sufficient rigidity, such as aluminum alloy or engineering plastic, and its cup shape is slightly below the waist. The bottom end of the cup is provided with a rising convex platform, and the convex platform surface 1 1 1 is a horizontal plane symmetrically arranged on the central axis. The upper and middle part of the cup is provided with a flat and symmetrical concave part fitting 103, which is coaxial with the aforementioned convex platform surface 1 1 1 (page 26 细则). And intersect perpendicularly. A circular neodymium-iron-boron permanent magnet 12 is installed and positioned at a central portion of a flat surface of a circular flat plate 13 _B made of magnetic material, and another circular portion is installed and positioned at a central portion of a flat surface of the other side of the flat plate 13 _B. Shape NdFeB permanent magnets 12 ', two permanent magnets have the same projected flat area, volume, and magnetic energy product, and have the same polarity on the side close to the flat plate 13 _B (the present invention is set to N pole, the following implementation The explanations of the examples are also used continuously without repeating). The outer sides of the two permanent magnets (that is, the S pole side) are respectively installed with a positioning plate 13 _A and a plate 13 _c . The plates 13 _A and 13 _e have the same thickness. And it is half the thickness of the flat plate 13 _B. The flat plate 13 _A , the flat plate 13 _B , the flat plate 13 _c, and the pair of repulsive-type permanent magnets 12 and 12 'are all laminated with an adhesive to form an inner core of the speaker magnetic circuit. Finally, this inner core is bonded and positioned on the convex platform surface 111 by an adhesive. The outer core of the magnetic circuit, that is, the ring-shaped cylindrical magnetic body 113 is inserted into the recessed part mating surface 103 of the basin frame from the outer direction of the basin frame, and is coaxially positioned with the permanent magnet and the flat plate and is bonded by an adhesive Firm. Since the diameter of the permanent magnet 12 and the permanent magnet 12 'than the plate 13 _A, plates 13 _B, 13 _c of the plate is slightly smaller in diameter, so the above three plates are formed symmetrically in the mounting locations of three radially symmetrical convex lip 130 _a, the convex lip 130 _B, the convex lip 130 _e, the above-mentioned three convex radially outer lip is perpendicular to the circumferential surface of the permanent magnets and the ring plate coaxially installed cylindrical magnetic body The inner peripheral surface of 113 constitutes three magnetic gaps 110 _A , 110 _B , and 110 _c . Since the basin frame 101 is provided with a preset stop surface, as long as the axial height of the ring-shaped cylindrical magnetic body 113 is equal to the axis of the flat plate 130 _A , the flat plate 130 _B , the flat plate 130 _c, and the permanent magnet 12, the permanent magnet 12 ' The total height is equal. With the help of a very simple positioning process and fixture, the present invention can easily control the three magnetic gaps 110 _A , 110 _B , and 110 _e to obtain sufficient uniformity in the circumferential direction. _A voice coil 19 _A , a voice coil 1 and a voice coil 19 _c are respectively inserted in the three magnetic gaps, and they have the same voice coil skeleton 17. As shown by node I in this figure (FIG. 15 of the present invention): A magnetic gap 110 _B in the center has a permanent magnetic field line direction of a radially outwardly protruding lip 13 (^ from the left side through the voice coil 1¾ and then through The ring-shaped cylindrical magnetic body 113 is divided into two upper and lower loops, and then passes through the magnetic gap 110 _A and the magnetic gap 110 _c from the right side of the voice coil 19 _A and the right side of the voice coil 19 _c through the radially outward convex lips of the two outer flat plates. 130 _A , convex lip 130 _c, and flat plate 13 _A , flat plate 13 _c return to the N pole of the permanent magnet 12 and the permanent magnet 12 '. According to the Lorentz force principle, the direction of the voice coil and the flow through the voice coil are specified. Current direction, so that the three voice coils generate the same direction electric force F _A , F _B , F _co in the magnetic gap at the same working instant when the audio current is switched on, for example, when viewed from the outside of the speaker diaphragm In this embodiment, the voice coil 19 _A and the voice coil 19 _e may be provided with a counterclockwise winding direction, the voice coil 19 _{B may be} provided with a clockwise winding direction, and the phase difference between the two sets of voice coils is 180 °. this standard is about to be described and will not be repeated), and then the coil 19 _A, then the voice coil in series with the coil 19 _c 19 _B connected in parallel, This enables the total coil inductance is reduced 1/2, the frequency of the speaker - impedance response curve is flatter another example, the voice coil may also be 19 _A, the voice coil 1, coil 19 _e all connected in parallel. Or the three voice coils can be connected according to the fully symmetrical repulsive magnetic circuit and the winding direction and electrical principle wiring method as determined in claim 16 or claim 14 of the present invention, and the total inductance of the speaker can be reduced to the original value. 1/3 of it reaches a value of 0.

The three voice coils share a voice coil skeleton 17, and the upper part of the voice coil skeleton is connected to the diaphragm 16 and the core support piece 18, respectively, and the latter is bonded and fixed to one provided by the basin frame 101 with an adhesive. Traditional annular support platform surface.

Since this embodiment uses a pair of repulsive neodymium-iron-boron permanent magnets and has three magnetic gaps and three voice coils, the electric force of the speaker is F = F _A + F _B + F _C , so three magnets The magnetic induction intensity B _f value of the gap is designed to be lower, thereby effectively reducing the eddy current of the magnetic circuit, making the distortion of the speaker lower than that of a speaker using a single NdFeB permanent magnet magnetic circuit, and making the speaker's electric sound Replacement page (by-law 26 糸) Conversion efficiency has been greatly improved. For example, when the speaker has an 8-inch aperture, the SPL value can easily reach above 97dB / W / m; when the speaker has a 15-inch aperture, the SPL value can easily exceed 100-102dB / W / m.

Fig. 2 is a longitudinal sectional view of a speaker according to a second embodiment of the present invention.

This embodiment relates to the main components of a speaker such as a basin frame, a permanent magnet, a flat plate, a radially convex lip, a ring-shaped magnetic body, a magnetic gap, a voice coil, a diaphragm, and a core support, and the structure of a coaxial magnetic circuit. The principle, the winding direction of the voice coil, and the connection mode and working principle of the voice coil are exactly the same as those described in the first embodiment of FIG. 1, and this embodiment will not be repeated. Different from FIG. 1, the central portion of the flat plate 23 _A , the flat plate 23 _B , the flat plate 23 _c, and the neodymium-iron-boron permanent magnet 22 and the permanent magnet 22 ′ of the embodiment 2 is provided with a central shaft hole 214 having the same or equivalent diameter. A raised inwardly convex platform is provided at the bottom end of the center of the basin frame. The inwardly convex platform surface 211 is a horizontal plane symmetrically arranged on the central axis, but at the central axis portion, an inward raised surface is formed. The convex platform surface 211 perpendicularly intersects the internally convex cylindrical body 212, which is integrally formed when die-casting the basin frame, and its cross-section is in a sliding fit with a slight gap between the platform and the central shaft hole 214 of the permanent magnet through precision casting. Or subsequent machining processes, to ensure the coaxiality between the outer peripheral surface of the inwardly convex cylindrical body 212 and the ring-shaped cylindrical magnetic body—the mating surface 203 of the recessed portion of the basin frame and the perpendicularity to the inwardly convex platform surface 211. The embodiment can further simplify the installation process of the speaker, and directly assemble the inner and outer cores of the magnetic circuit of the speaker without using a special fixture, and form three symmetrical magnetic gaps 210 _A , 210 _B , and 21 with sufficient accuracy at a time. 0 _c .

There is another embodiment of the assembly method of the magnetic circuit of the loudspeaker: the apertures of the central shaft holes of the flat plate and the permanent magnet are appropriately increased, and when the flat plate and the permanent magnet are embedded in the inner convex column shape When the body 212 and the convex platform surface 211 are filled with an adhesive 001 in a gap formed by the central shaft hole 214 and the outer peripheral surface of the convex cylindrical body 212, it can prevent the flat plate or the permanent The horizontal tension generated by the magnet due to the eddy current heating expansion will loosen the adhesive of the magnetic circuit and cause the eccentric displacement of the core of the magnetic circuit that is not allowed. On the other hand, the flat plate and the permanent magnet can be separated from the The basin frame 201 is connected as a whole.

Fig. 3 is a longitudinal sectional view of a magnetic circuit of a speaker according to a third embodiment of the present invention.

In the third embodiment, only the inner core of the loudspeaker magnetic circuit, that is, the part involving the flat plate and the permanent magnet is supplementarily explained. The main components of the speaker, such as the basin frame, the ring-shaped magnetic body, the magnetic gap, the voice coil, the diaphragm, and the core support, the principle of the coaxial magnetic circuit, the orientation of the voice coil, and the connection method of the voice coil, and The working principle is exactly the same as that described in the first embodiment of FIG. 1, and the third embodiment will not be repeated. Seen from Figure 3, Example 3 uses a permanent magnet type NdFeB bonded one pair of the columnar structure of the repulsive type, mounted on both sides of the plate 33 _B permanent magnets 32 and 32 ', each one adhered NdFeB The knot-shaped permanent magnets are each provided with a circular horizontal base surface 321 or a base surface 321 '. Within the axial height H value, the permanent magnets are cylinders of equal height and their projection areas are equal. The permanent magnets are provided with symmetrical radial outwardly protruding lip 320 _A and outwardly protruding lip 320 _e protruding to the outside. The thickness of the vertical outer peripheral surface of the permanent outer radial lip of the permanent magnet is flat plate 33 _{B in} principle. half the thickness of the radially outwardly convex plate lip 33 _B 330 _B of the permanent magnet is radially outwardly convex lip 320 _a, the convex lip _320c having an equal projected area by the three radial convex lip The inner peripheral surface of the ring-cylindrical magnetic body 3 13 whose vertical outer peripheral surface is coaxial with the permanent magnet constitutes three of the magnetic gaps of the speaker. Similar to FIG. 1, on the side plane of a permanent magnet 32 ′ with a radially outward convex lip immediately adjacent to the inside of the basin frame, a permanent magnet 32 and a permanent magnet 32 ′ and a flat plate 33 _{B are} formed by a positioning process and a clamp. Magnetic circuit inner core adhesive positioning on the inner replacement page (Details Article 26) Convex platform surface 311. The permanent magnet 32 and the permanent magnet 32 ′ are magnetically polarized by the columnar horizontal base surface 321 and the base surface 321 ′ to the vertical peripheral surfaces of the radially outwardly protruding lip 320 _b and 320 _c at the upper end of the permanent magnet, respectively. Form a pair of repulsive magnets, as shown in Figure 3. It can be seen that, compared with Example 1, Example 3 eliminates the two guide plates 13 _A and 13 _{c of} permanent magnetic field lines, which reduces the magnetic leakage loss, the equivalent inductance of the magnetic circuit of the speaker, and the eddy current loss. The excellent effect of reducing phase distortion and harmonic distortion. In particular, if the flat plate 33 _B and the coaxially-mounted toroidal magnetic body 313 are changed to a soft ferrite core with high magnetic permeability and high resistivity, or a quenched amorphous alloy or a quenched ultra-microcrystalline alloy material, When alternating audio currents, especially high audio currents, flow through the voice coil, the eddy currents that occur in the magnetic circuit can be extremely significantly curbed. On the one hand, it reduces the iron loss and improves the electrical-acoustic conversion efficiency. On the other hand, the flatness of the frequency-sound pressure response curve, especially the high-end part of the audio, will be greatly improved, and the fundamental wave, second harmonic, third harmonic distortion, and phase distortion will be greatly reduced. In this way, the speaker provided by the present invention, particularly a large-diameter professional speaker, can be used to dive in the middle and high frequency frequencies and shift the frequency division point, so that a Hi-end speaker with high output sound pressure and wide dynamic range can be manufactured.

Fig. 4 is a longitudinal sectional view of a magnetic circuit of a speaker according to a fourth embodiment of the present invention.

To simplify the process and fixtures. The rare earth metal bonded permanent magnet 42 and the permanent magnet 42 ′ and the flat plate 43 _{B of} this embodiment are provided with a central shaft hole 414 having the same or equivalent diameter, and a rising inner portion is provided at the bottom end portion of the shaft center of the basin frame 401. Convex platform, this convex platform surface 411 is a horizontal plane symmetrically arranged on the axis, but at its central axis, a convex convex body 412 perpendicularly intersecting the convex platform surface 411 is raised inward. The section and the central shaft hole 414 of the platform and the permanent magnet have a sliding fit with a slight gap. Through precision casting or subsequent machining processes, the outer peripheral surface of the convex cylindrical body 412 and the ring-shaped cylindrical magnetic body-a basin frame are ensured. The coaxiality of the mating surface 403 of the concave portion and the perpendicularity of the mating surface 411 of the convex surface. The rest of the main components of the speaker, the principle of the coaxial magnetic circuit, the winding direction of the voice coil, and the connection mode and operating principle of the voice coil are described with Embodiment 1 in FIG. 1 and Embodiment 2 in FIG. 2 and Embodiment 3 in FIG. 3 Exactly the same and not repeated.

Fig. 5 is a longitudinal sectional view of a magnetic circuit of a speaker according to a fifth embodiment of the present invention.

Embodiment 5 is a modification of Embodiment 1 in FIG. 1. At this time, the inner core of the magnetic circuit of the speaker is composed of two pairs (equivalent to one pair) of repulsive magnets: a pair of thinner permanent magnets 92-2 and 92'-2 are respectively installed and positioned on the flat plate. 92-1 and the permanent magnet against the outside of the permanent magnet 92'- 1 on both sides of the plane 93 _B, the polarity of these two permanent magnets arranged in FIG. 1 the same as in Example 1. Two flat plates 93 _A and 93 _e are installed and positioned on the outer planes of the permanent magnets 92-1, 92'-1, 92-2, and 92'-2, respectively, and the two flat plates Each has an inner plane matching the outer plane of the permanent magnet. In addition, the technical performances such as the geometric shape and material requirements of the permanent magnet and the flat plate are exactly the same as the related description of Embodiment 1 in FIG. 1, and this embodiment will not be repeated. As a result, a ring mounted coaxially with the permanent magnet and the flat plate on the vertical outer peripheral surface of the radially outer convex lip 930 _A , the outer convex lip 930 _B , and the outer convex lip 930 _c of the two flat plates. The three magnetic gaps 910 _A , 910 _B , and 910 _e of the speaker are formed between the inner peripheral surfaces of the cylindrical magnetic body 913. The remaining main components of the speaker, the principle of the coaxial magnetic circuit, the winding of the voice coil The connection principle and working principle of the circuit principle of the direction and voice coil are exactly the same as the description of the first embodiment of FIG. 1, and this embodiment will not be repeated.

FIG. 6 shows another modification of the embodiment 1 of FIG. 1. Replacement page (by-law 26 糸) FIG 5 is different: positioning a permanent magnet mounted on the respective sides of the central axis plane of the flat portion of the permanent magnet 93 _B 92-1 and 92'-1 are a pair of thin repulsive permanent magnet, and against The permanent magnet 92-1 and the permanent magnet 92'-1 are installed and positioned on the outside of the pair of repulsive permanent magnets 92-2 and 92'-2 which are thicker than the former (equivalent to a pair of repulsive magnets) Except that, other descriptions of the embodiment 6 of FIG. 6 and the embodiment 5 of FIG. 5 are completely the same. The main components of the speaker, the principle of the coaxial magnetic circuit, the winding direction of the voice coil, and the connection mode and operating principle of the voice coil are exactly the same as those described in the first embodiment of FIG. 1, and this embodiment will not be repeated.

Fig. 7 is a longitudinal sectional view of a magnetic circuit of a speaker according to a seventh embodiment of the present invention.

The diameter of the ring-shaped cylindrical magnetic body 813 is reduced to become a magnetic core of the speaker with a central shaft hole 814. It can be made of ferrite, electrical pure iron or other good-conducting magnet alloy materials. It can be made of a quenched amorphous alloy or a quenched ultra-microcrystalline (amorphous) alloy with high magnetic permeability and high resistivity. During installation and positioning, the inner peripheral surface of the central axis hole of the ring-shaped cylindrical magnetic body 813 is embedded in the convex columnar body 812 on the convex platform surface 811 of the basin frame 801, and is bonded with an adhesive On the convex platform surface 811. The gap formed between the outer peripheral surface of the convex cylindrical body 812 and the central shaft hole 814 of the ring-shaped cylindrical magnetic body 813 is filled with an adhesive to prevent the ring-shaped cylindrical magnetic body 813 from being eccentrically displaced and connected to the basin frame 801. A whole. Half axial height of the cylindrical ring a group bonded type rare earth metal permanent magnet ring 82 and the cylindrical magnetic body mounted coaxially with a radially inner edge of the lip 820 _B, corresponding to the permanent magnet in the ring The cylindrical magnetic body 813 is provided with radially inwardly convex lip 820 _A and inwardly convex lip 820 _c at the two outer ends of the axial height, and the horizontal centerline x ~~ x of the radially inwardly convex lip 820 _B is ensured. The axial height of the two outer flat surfaces of the ring-shaped cylindrical permanent magnet 82 is the same (H ₈ = H ₈ ). The three radially inwardly protruding lips of the ring-shaped cylindrical permanent magnet 82 have equal inner diameters and projected areas, and the axial thicknesses of the radially inwardly protruding lips 820 _A and 820 _c are approximately equal to the radial inward direction. The lip 820 _B is 1/2 of the axial thickness. In the present embodiment, the cylindrical permanent magnet ring 82 of the inner edge of the intermediate lip 82 (^ circumferential face two vertical inner edge of the lip end portion 82 on both sides (820 _c ^ and vertical The peripheral surface is magnetized and polarized to form a pair of repulsive magnets, and the specific polarities are as shown in Fig. 7. When the outer peripheral surface of the ring-shaped cylindrical permanent magnet 82 is embedded in the inner mating surface 803 of the recessed portion of the basin frame 801 and After being connected with the basin frame as a whole, three shapely shapes can be formed between the vertical inner peripheral surface of the three radially inwardly protruding lips of the annular cylindrical permanent magnet 82 and the outer peripheral surface of the annular cylindrical magnetic body 813. The magnetic gaps 810 _A , 810 _B , and 810 _c are inserted into the above-mentioned magnetic gaps. A voice coil skeleton 87 and three independently wound voice coils 89 _A , voice coils 8, and voice coils 89 _e are inserted. Figure 1 The voice coil winding direction and circuit principle wiring and working principle described in Example 1 can make the three voice coils generate the same direction of electric force F (F = F _A + F _B + F) _C ). There is no doubt that the permanent magnetic field lines in the magnetic gap of this embodiment are similar to those indicated in FIG. 15, but the permanent magnetic field The direction of the force line is exactly the opposite, as shown in Figure 16 node II. In addition to the above, the main components of the speaker, the principle of the coaxial magnetic circuit, the direction of the voice coil, and the circuit principle of the voice coil The working principle is exactly the same as that described in the first embodiment of FIG. 1, and this embodiment will not be repeated.

For a description of the structure of the basin frame, refer to the related description of Embodiment 1 in FIG. 1. ⑤

The bottom part of the axial center of the circular cone-shaped pedestal 1501 has a raised convex platform, and the convex platform surface 1511 is a horizontal plane symmetrically arranged on the central axis. The lower part of the basin frame is slightly cup-shaped, and a flat and symmetrical recessed part mating surface 1503 is provided at the upper and middle part of the cup, which coaxially and perpendicularly intersects the aforementioned convex platform surface 1 5 1 1. A set of cylindrical rare earth metal bonded permanent magnets 1 502 Replacement page (Details Article 26) It is adhered to the inwardly convex platform surface 1511, which has a circular or regular hexagonal cross-sectional shape. At one-half the axial height of this group of columnar permanent magnets, a symmetrical radial outward lip 1520 _{B is provided} , and at the two outer ends of the permanent magnets 1502, a symmetrical radial outer rim is respectively provided. The convex lip 1520 _A , the convex lip 1520 _e , the projection areas of the three radial convex lip are equal, and the axial thickness of the convex lip 1520 _A and the convex lip 1520 _{c are} in principle the convex lip 152 (half of the thickness. The bonded permanent magnet consists of the radially outwardly protruding lip 1520 _B in the middle facing the two radially outwardly protruding lips 1520 _A and 1520 _c on the outside. The vertical planes are magnetized and polarized to form a pair of repulsive magnets. Their polarities are shown in Figure 8. A ferrite core made of a ring-shaped cylindrical magnetic body 1513 has an axial height that is in principle equal to that of the permanent magnet 1502 The axial height is equal or equal. The ring-shaped cylindrical magnetic body 1513 installed coaxially with the permanent magnet 1502 is inserted into the recessed part mating surface 1503 of the basin frame from the outside to obtain a radially outwardly protruding lip 1520 _A , Outer convex lip 1520 _B , Outer convex lip 1520 _c Vertical outer peripheral surface and ring-shaped cylindrical magnetic body 1513 Inner peripheral surface The three symmetrical magnetic gaps 1510 _A , 1510 _B , and 1510 _{c are formed} . Three coaxially mounted voice coils 1509 _A , 1509 _B , and 1509 _c are inserted in the magnetic gap. They have The same voice coil skeleton 1507 specifies the winding directions of the three voice coils and the direction of the current flowing through the voice coils. The three voice coils can generate the electromotive force F in the same direction at the same working moment when the audio current is introduced.

Because this embodiment uses a rare earth metal bonded permanent magnet and a ferrite core with high permeability and high resistivity to make a ring-shaped cylindrical magnetic body, when audio current is introduced into the voice coil, the magnetic field lines The eddy current and the equivalent inductance of the speaker magnetic circuit will be much smaller than traditional speakers with metal yoke, which will greatly reduce the harmonic distortion and phase distortion of the speaker, and the low end of the sound pressure-frequency response curve The high-end will also dive up and the entire frequency-sound pressure curve becomes flatter, and the effective dynamic range of the speaker is significantly widened. Since this embodiment uses a pair of repulsive magnets and a magnetic circuit, the electric force acting on the diaphragm 1506 is linearly superimposed by the electric forces of the three voice coils, that is, F = F _A + F _B + F _e , so this The speaker of the embodiment can obtain extremely high fidelity and high sensitivity, and become a Hi-end speaker, and overcome the thermal expansion of the core of the conventional speaker magnetic circuit under the action of eddy current, and cut the adhesive The ill effects of eccentric displacement due to cutting looseness. In addition to the above, the main components of the loudspeaker, the principle of the coaxial magnetic circuit, the winding direction of the voice coil, and the principle of the voice coil circuit in this embodiment 8 are completely the same as the description of the embodiment 1 in FIG. Repeat again. ⑤

Fig. 9 is a longitudinal sectional view of a speaker according to a ninth embodiment of the present invention. ⑤

The difference from Embodiment 8 is that the permanent magnet 1602 of Embodiment 9 is a group of columnar rare earth metal bonded magnets having a central shaft hole 1614. As long as the central axis hole of the magnetized and polarized permanent magnet is embedded in the convex cylinder 1612 of the convex platform surface 1611 of the basin frame 1601, the three magnetic gaps 1610 _A and Gap 1610 _B and magnetic gap 1610 _c . In addition to the above, the ninth embodiment relates to the main components of the speaker, the principle of the coaxial magnetic circuit, the winding direction of the voice coil, and the electrical principle of the voice coil. The connection method and working principle are the same as those in FIG. 1 and FIG. 8 The description of 8 is exactly the same and will not be repeated.

⑤ Fig. 10 is a longitudinal sectional view of a magnetic circuit of a speaker according to a tenth embodiment of the present invention. ⑤

A ring-shaped flat plate 1763 is mounted and positioned on a side surface of a ring-shaped cylindrical rare-earth metal-bonded permanent magnet 1702, and another ring-shaped tube-shaped rare-earth metal bonded type is mounted on the other side of the circular plate 1763. The permanent magnet 1702 'is installed and positioned. The side of the two permanent magnets abutting the ring-shaped flat plate (that is, the circular cylindrical horizontal base surface) has the same polarity, and this embodiment 10 is set to N polarity. The annular flat plate 1763 has a large-diameter central shaft hole, and the inner edge of the annular flat plate 1763 forms a shapely radially inward convex lip Π20B. The outer ends of the two permanent magnets 1702 and 1702 'form two symmetrical radial inward lip 1720 _A and inwardly convex lip 1720 _c from the inner side of the ring cylindrical shape of the permanent magnet toward the central axis. The convex lip 1720 _A , the convex lip Π20 _Β , and the convex lip 1720 _c have equal projected areas. The permanent magnet 1702 and the permanent magnet 1702 'have the same projection plane and several replacement pages (Article 26 of the detailed rules). The shape and magnetic energy product, and the ring-shaped cylindrical horizontal base of the permanent magnet facing the radially inner convex lip 1720 _A , the inner convex lip 1720 _B of the vertical inner peripheral surface is magnetically polarized, thereby forming a pair of repulsive type The specific polarity of the magnet is shown in FIG. 10. A toroidal magnetic body 1713 has a cross-sectional area (circular or regular hexagon) matching the permanent magnets 1702 and 1702 'and the annular flat plate 1763, and will be coaxial with the permanent magnets 1702 and 1702'. The mounted cylindrical magnetic body 1713 is fitted on the convex platform surface 1711 and the convex column body 1712 of the basin frame 1701, and is bonded to the convex platform surface 1711 of the basin frame as a whole. Then, the magnetic core composed of the permanent magnet 1702, the permanent magnet 1702 'and the annular flat plate 1763 is inserted into the inner mating surface 1703 of the recessed portion of the basin frame, and is bonded to the basin frame after positioning. overall. As a result, three symmetrical ring magnets are formed between the vertical inner peripheral surface of the radially inwardly protruding lip 1720 _A , the inwardly protruding lip 1720 _B , and the inwardly protruding lip 1720 _{c and} the outer peripheral surface of the annular cylindrical magnetic body 1713. Gap (circular ring or regular hexagonal ring), insert the voice coil 1709 _A , voice coil 170, voice coil 1709 _c and voice coil skeleton 1707 into the above magnetic gap, and specify the winding direction of the voice coil 1709 _A and voice coil 1709 _c . The voice coil 1709 _B has the opposite winding direction (phase difference 180 °) and the direction of the current flowing through the voice coil. When audio current is introduced into the voice coil, the three voice coils are in the same working moment after the audio current is turned on. Electromagnetic forces F _A , F _B , and F _c in the same direction are generated in the magnetic gap, and the electromotive force F = F _A + F _B + F _{C of} the speaker. ⑤

If the ring-shaped cylindrical magnetic body is made of soft ferrite with high magnetic permeability and high resistivity, the speaker of this embodiment 8 will have both Hi-end high-fidelity and high sensitivity. Except for the above, the rest of the embodiment 10 is exactly the same as the description of the embodiment 1 of FIG. 1 and the embodiment 8 of FIG. 8, and this embodiment will not be repeated.

FIG. 11 shows a cross-sectional view of a magnetic circuit according to the first embodiment of the present invention. (See also Figure 1) This figure lists three different implementations.

FIG Ha circular permanent magnet 12 having a solid, circular plate 13 _B and a radially outer convex lip 130 _B thus composed of a cylindrical ring coaxial with the magnetic body and the permanent magnet 113 mounted The peripheral surface and the outer peripheral surface of the convex lip 130 _B constitute a circular ring-shaped magnetic gap 110 _B; Figure 11-b has a solid hexagonal permanent magnet 12, a regular hexagonal flat plate 13 _B, and a radially outward convex composed thereof. A lip 130 _B , a circular arc-shaped transition line segment symmetrical to the left and right sides of the internal angle angle bisector is provided at the intersection of the regular hexagonal permanent magnet and the top end of the internal angle of 120 ° of the regular hexagonal flat plate, and the permanent the inner circumferential surface of the male lip 130 _B magnet coaxially mounted and a ring matching the cylindrical magnetic member 113 constitutes the outer circumferential surface of an annular magnetic gap 110 _B; FIG. 11c having four equal area sector permanent magnets assembled into a set of sheets equivalent solid permanent magnets 12, a circular plate 13 _B and the resulting composition radially outwardly convex lip 130 _B, the inner circumferential surface 113 and an outer ring with a cylindrical permanent magnet of the magnetic body mounted coaxially projecting lip 13 (¾ of an outer circumferential surface of the annular magnetic gap constituting 110 _B.

Fig. 12 is a cross-sectional view showing a magnetic circuit of Embodiment 2 of the present invention. (See also Figure 2) This figure lists two different implementations.

Figure 12a: Four equal-area, equal-thickness fan-shaped permanent magnets are assembled into a set of equivalent hollow permanent magnets 22, a circular flat plate 23 _B with a central shaft hole 214, and a radially outward convex lip formed thereby. convex surface of the inner circumferential edge of the lip 230 _B, and the permanent magnet coaxially mounted a cylindrical ring 23 of magnetic material 213 (outer circumferential surface configured ^ circular magnetic gap 210 _B; Figure 12b is provided with a set of A regular hexagonal permanent magnet 22 with a central shaft hole 214, a regular hexagonal flat plate 23 _B, and a radially outward convex lip stage 230 _B formed thereby, the regular hexagonal permanent magnet and 120 ° of the regular hexagonal flat plate A circular arc-shaped transition line segment symmetrical to the inner angle angle bisector is formed at the intersection of the top end of the inner angle, and the inner peripheral surface of a ring-shaped cylindrical magnetic body 213 coaxially installed with the permanent magnet and the convex lip 230 _B The outer peripheral surface forms a ring-shaped magnetic gap 210 _B. Replacement page (Article 26) FIG. 13 is a cross-sectional view of a magnetic circuit according to Embodiment 8 of the present invention (see FIG. 8). This example lists two different implementations. Figure 13a has a set of round, solid cylindrical permanent magnets 1502, thereby forming a radially outwardly convex lip 1520 _B and a circular magnetic gap 1510 _B , a ring-shaped cylindrical magnetic body mounted coaxially with the permanent magnets The inner peripheral surface of 1513 and the vertical outer peripheral surface of the radially outwardly protruding lip 1520 _B constitute the magnetic gap 1510 _B; Figure 13b has a solid, regular hexagonal cylindrical permanent magnet 1502, thereby forming a radially outwardly convex lip The edge 1502 _B and the regular hexagonal magnetic gap 1510 _B , the inner peripheral surface of a ring-shaped cylindrical magnetic body 1513 mounted coaxially with the permanent magnet and the vertical outer peripheral surface of the radially outward convex lip 1520 _B constitute the magnetic gap. 1510 _B. ⑤

Fig. 14 shows a cross-sectional view of a magnetic circuit according to a tenth embodiment of the present invention (see Fig. 10). ⑤

FIG. 14 has two sets of ring-shaped cylindrical permanent magnets 1702 and 1702 ', a ring-shaped flat plate 1763, thereby forming a radially inner convex lip 1720 _B and a ring-shaped magnetic gap 1710 _B. An outer peripheral surface of a ring-shaped cylindrical magnetic body 1713 installed coaxially with the permanent magnet and a vertical inner peripheral surface of the radially inwardly protruding lip 1720 _B constitute the magnetic gap 1710 _B.

FIG. 15 shows a partially enlarged view of node I in Embodiment 1 of the present invention and a partially enlarged view of Node II in Embodiment 7 of the present invention.

FIG. 15 uses Embodiment 1 (see also FIG. 1 and FIG. 17 a) as an example. The permanent magnet N pole of the side of the flat plate 13 _{B of the} loudspeaker magnetic circuit draws the permanent magnetic field lines from the radial outward lip of the flat plate. 130 _B passes through the magnetic gap from left to right, 110 _{B is} divided into upper and lower branches of different axial heights, flows into the ring-shaped magnetic body 113 of the magnetic circuit, and then passes through the magnetic circuit from right to left. The magnetic gap 110 _A and the magnetic gap 110 _e flow back to the N pole of the permanent magnet 12 and the permanent magnet 12 ′ through the radially outward convex lip 130 _A , the outward convex lip 130 _c and the flat plates 13 and 13 _c. If the secondary factors such as leakage flux and edge effects of different magnetic gaps are ignored, it can be considered that the magnetic flux passing through the middle magnetic circuit of the magnetic gap 110 _B and the voice coil 19 _B from left to right shown in FIG. 15 should be equal to the magnetic circuit. The sum of the magnetic fluxes of the two outer magnetic circuits passing through the magnetic gap U0 _A , the magnetic gap 110 _e, and the voice coil 19 _A and the voice coil 19 _c from right to left. The winding direction of the voice coil and the direction of the current flowing in the voice coil are thereby set, so that at the same working moment when audio current is introduced in the voice coil, the electromotive force generated by the voice coil in the magnetic gap F in the same direction: For node I, F = F _A , + F _B1 + F _C1 . Undoubtedly, the magnetic circuits of the embodiments 2 to 6, the embodiment 8, the embodiment, and the embodiments of the present invention can all be applied to the partial enlarged view of the node I.

FIG. 16 shows a partially enlarged view of the node II of Embodiment 7 (Embodiment 10) of the present invention.

Compared with the magnetic circuit of a loudspeaker in another embodiment of the present invention (node I is a partially enlarged view), the magnetic circuit, magnetic gap, voice coil, voice coil skeleton, voice coil winding direction, voice coil electrical principle wiring method, and working principle of the speaker exactly the same. It can be seen from the figure that node II only changes the permanent magnet described in node I from the inner core of the magnetic circuit to the outer core of the magnetic circuit, and the flow direction of the permanent magnetic field lines in the magnetic circuit is the same as that of Fig. 15, Fig. 17a, and Fig. The flow direction of the permanent magnetic field lines of the magnetic circuit at the node I in the partial enlarged diagram shown at 18a is just the opposite. For this reason, the direction of current flow in the voice coil is exactly the opposite (phase difference 180 °). Except for this, this figure will not be repeated here. As for the circuit principle wiring diagram of the voice coil, any one can be selected according to several embodiments of the present invention. Although the magnetic circuit of the loudspeaker composed of two sets of ring-shaped cylindrical rare-earth metal bonded permanent magnets and a ring-shaped flat plate is used in Example 10 of FIG. The description can refer to this figure without further description.

FIG. 17 shows the «structure and« principle wiring diagram of the first embodiment of the present invention with a pure resistance negator. Regarding the reference numerals of the main components of the surface and the speaker, the structure of the coaxial frame, and the working principle of the speaker, reference may be made to the description of Embodiment 1 in FIG. 1 and will not be repeated. This embodiment ^ In all embodiments of the present invention (¾ See Figure 1 to the replacement page (Details Article 26) Π).

The setting premise of a speaker with pure resistance load characteristics is as follows: the speaker has the basic structural characteristics of the speaker according to the embodiment 1 to FIG. 10 of the embodiment 10 of the present invention, and the speaker has a pair of completely symmetrical magnetic properties at different axial heights Or approximately symmetrical repelling magnets and repelling magnetic circuits and three of said magnetic gaps, and three coaxially mounted voice coils are inserted into said magnetic gaps, and three of said voice coils of said speaker The cross-sectional area of the wires is equal; when the two voice coils W _A and w _c located on the outer side are viewed from the outer direction of the loudspeaker diaphragm, they have a counterclockwise direction, and the centered voice coil

Must have a clockwise winding direction, and vice versa; the number of turns of voice coil W _A and voice coil W _c is equal to n _A = n _c , the number of turns of voice coil W _B n _B = n _A + n _c ; voice coil W _A and the voice coil inductance and W _e ^ 1 ^ 1 and equal voice coil \ ¥ inductance of the absolute _{value. 3} _{_{| L B | = | L a}} | + | L C |.

Fig. 17a shows a magnetic circuit diagram of a first embodiment of a loudspeaker with purely resistive load characteristics that meets the above-mentioned setting premise, and it is a partial enlarged view of node I of Embodiment 1 of Fig. 1 of the present invention (Example 1 to Embodiment 6, Embodiment 8, and Embodiment 9 The speaker magnetic circuit also has the same partial enlarged view of node I). Three voice coils 110 _A , 110 _B, and 110 _c distributed at different axial heights are respectively inserted with three voice coils W _A , voice coils W _B and voice coils W _c and share a voice coil skeleton 17, This constitutes two sets of mutually exclusive magnetic circuits with symmetrical magnetic and electrical properties, with the horizontal axis X-X as the symmetry axis, for example: Upper magnetic circuit 12 / N → 13 _B → 110 _B → W _B → 13 → 110 _A- The equivalent magnetic resistance of W _A → 13 _A -12 / S- * 12 / N and the lower magnetic circuit 127N— 13 _B → W _B → 13— 110 _c — W _c — 13 _c — 12VS— 12VN; plate 13 _B The thickness is equal to the sum of the thicknesses of the flat plates 13 _A and 13 _{c and} the thicknesses of the latter are also equal to each other; the magnetic gap 110 _A and the magnetic gap 110 _B and the magnetic gap 110. The values of the magnetic induction strength B _f are equal to each other; the directions of the permanent magnetic field lines in the upper and lower sets of magnetic circuits are shown as arrows; the cross-sectional areas in the upper and lower sets of symmetrical magnetic circuits are also equal and their magnetic fluxes ^ and ¥ _{2 are} also equal . According to the Lorentz force principle of electricity, the direction of current flow in the two voice coils W _A and W _c located on the outer side is assumed to be the current in the center voice coil W _B when flowing vertically from the outer side of the paper surface into the paper surface. the flow direction of the paper by the paper inside vertical outer flow, the trailing end of the voice coil Y _a W _a W _B with the coil end of the first series X _B, the trailing end of the voice coil Y _B W _B W _e of the voice coil headend headend X _e X _a series, the trailing end of the voice coil W _c Y _c in the axial direction of the bobbin 17 or embedded in patchwork bobbin sandwich the voice coil in a vertical lead of W _a A pair of input terminals constituting the speaker. At this time, the three voice coils W _A , voice coils W _B , and voice coils W _c have electric forces F _A , F _B , and F _{c in the} same direction as shown by arrows. The electric force F = F _A + F _B + F _C generated by the voice coil. If the signals with opposite phases are input to the terminals X _A and Y _c , the equation of the electric force F = F _A + F _B + F _C is unchanged, but the direction of the electric force F is just opposite to that shown in Figure 17a, which is 180 degrees apart. ° Phase angle.

Fig. 17b shows the circuit principle wiring diagram of the speaker. For each voice coil, the head end is set as the inflow direction of the voice coil current and the winding direction of the voice coil is determined based on this principle. This principle is used in all embodiments of the present invention without repeated description. When the voice coil WA and the voice coil W _c are turned counterclockwise and the voice coil W _B is turned clockwise, the working conditions of the three voice coils are exactly the same as the requirements shown in FIG. 17 a. In particular the present invention a magnetic circuit, a voice coil W _A voice coil W _B, W _c voice coil are connected in series in the same circuit, and the winding direction thereof and the opposite, so the voice coil W _C W _A and coil inductance 1 ^ phase inductance LB and the phase of the coil L _C W _B is exactly 180 ° out of phase angle. In the same way, the self-inductive back electromotive force and dynamic potential of voice coil W _A , voice coil W _c, and voice coil \ ¥ ₁₃ , that is, the "generator potential" induced when the voice coil moves axially perpendicular to the permanent magnetic field lines are always Maintain a phase difference of 180 °. Therefore, as long as the voice coils W _A and W _{c are set to} have the same number of turns! ^ And n _c and equivalent inductance! ^ And L _c , Voice coil W _B replacement page (Details Article 26 糸) The absolute value of the inductance | L _B | = IL _A | + | L _C |, that is, the inductances of the voice coils in this embodiment cancel each other out. Therefore, when the speaker is connected to an audio signal, the speaker will have a purely resistive load characteristic or an approximately purely resistive load characteristic. In other words, the frequency-impedance response curve of the speaker provided by the present invention is a straight line at the best state. Because the two outer magnetic gaps 110 _A and 110 _c and the central magnetic gap 110 _c have incomplete magnetic line edge effects, if the adjustment is not performed properly in practical engineering applications, the load characteristics of the above speakers may become approximately pure resistance. For the non-optimal state of the load characteristics, the corresponding frequency-impedance response curve may also become an approximate straight line.

In the present embodiment, if the sectional area of the three coil conductors ranging from the premise of the present embodiment and the other embodiment remains the same, then the impedance Z _B W _B of the voice coil of the voice coil W _A, tone The impedance Z _A and the impedance Z _e of the coil W _B are different (Z _B ≠ Z _A + Z _e ). Due to a certain phase difference, the speaker will not have the best purely resistive load characteristics.

Fig. 18 shows the magnetic circuit structure and circuit principle wiring diagram of the second embodiment of the speaker with purely resistive load characteristics of the present invention. Regarding the magnetic circuit structure and the designation of the main components of the loudspeaker, the principle of the coaxial magnetic circuit, and the working principle of the loudspeaker, reference may be made to the description of Embodiment 1 in FIG. 1 and will not be repeated. This embodiment is applicable to all the embodiments of the present invention (see FIG. 1 to FIG. Π).

The setting premise of a speaker with pure resistance load characteristics is as follows: it has the basic structural characteristics of the speaker according to the embodiment 1 to FIG. 10 to the embodiment 10 of the present invention, and the speaker has a pair of full symmetry or approximation at different axial heights Repulsive magnets, repulsive magnetic circuits, and three of the magnetic gaps for full symmetrical magnetic performance, insert three coaxially mounted voice coils in the magnetic gaps, and three of the voice coils of the speaker The cross-sectional area of the wires is equal; when the two voice coils W _A 'and voice coil Wc located on the outer side are viewed from the outer direction of the speaker diaphragm, they have a counterclockwise winding direction, and the center voice coil W _B ' must have a clockwise direction. Winding direction, and vice versa; voice coil W _A 'and voice coil w _c ' have equal number of turns n _A 'and equal inductance L _A ' and inductance L _c ', voice coil W _B ' is at 1/2 turns There is a center tap Y _B ′ and thereby constitute a voice coil W _B1 ′ and a voice coil W _B2 ′, which have equal turns n _B1 ′ and n _B2 ′ and equal inductances L _B1 ′ and L _B2 ′; Specify the number of turns of the voice coil n _A '= _ne ' = n _B1 '= n _B2 ' and also specify the absolute value of the inductance of the voice coil | L _BI '| = | L _B2 '| = | L _A ' | = | L _C '|.

FIG. 18 a shows a magnetic circuit diagram of a second embodiment of a speaker with pure resistive load characteristics that meets the above-mentioned setting premise, and it is a partial enlarged view of node I of Embodiment 1 of FIG. 1 of the present invention. The speaker magnetic circuits of Embodiments 1 to 6, 8 and 9 all have the same node I partial enlarged views as those of the magnetic circuit of the speaker.

Three magnetic coils 110 _A , 110 _B, and 110 _c distributed at different axial heights are respectively inserted with three voice coils W _A ', voice coils W _B ', and voice coils W _c 'and share one voice coil The skeleton 17 is composed of two sets of mutually exclusive magnetic circuits with symmetrical magnetic and electrical properties on the horizontal axis X′― x 'as a symmetry axis, for example: Upper magnetic circuit 12 / N → 13 _B — 110 _B → W _B ' → 13 → 110 _A -W _A '→ 13 _A → 12 / S → 12 / N and the lower magnetic circuit 127N— 13 _B → W _B ' → 13 → 110 _c — W _C '→ 13 _C → 127S → 12' / The equivalent magnetic resistance of N is equal; the thickness of the flat plate 13 _B is equal to the sum of the thicknesses of the flat plate 13 _A and the flat plate 13 _{e and} the thicknesses of the latter are also equal to each other; the magnetic gap 110 _A and the magnetic gap 110 _B and the magnetic gap 110 _e magnetic induction B values are equal to each other; the vertical direction of the two magnetic circuits the permanent magnetic field lines as indicated by arrows; cross-sectional area of the magnetic circuit in two vertically symmetrical and which is also equal to the flux Ψ, and _11/2 are also equal to . According to the Lorentz force principle of electricity, the direction of current flow in the two voice coils W and W _c 'located on the outside is assumed to be replaced by a sheet of paper (decision 26) When the outside flows vertically into the paper surface, the direction of current flow in the centered voice coil W _B flows vertically from the inside of the paper surface to the outside of the paper surface. The voice coil W _A 'of the trailing end Y _A' to the voice coil W _B1 'end of the first X _B1' connected in series, the voice coil W _B2 'end of the first _Χ Β2' voice coil W _c 'of the trailing end Y _c' string then, the voice coil WA 'end of the first X _a' of the voice coil W _c 'end of the first X _c' is connected in parallel with the coil W _B1 'and voice coil W _B2' public trailing end Y _B 'constituting the speaker A pair of input terminals. The implementation method of the voice coil vertical lead is exactly the same as that described in FIG. 17a. At this time, there are three voice coils W _A ', voice coil W _B ', and voice coil W. 'The electric forces F _A , F _B and F _c with the same direction are shown by arrows, that is, the electric force F = F _A + F _B + F _C generated by the voice coil. When the phase of the input signal of the speaker is opposite, the equation of the electric force F = F _A + F _B + F _C does not change, but the direction of the electric force F is just opposite to that shown in the diagram, ie, a phase angle of 180 °.

Figure 18b shows the circuit principle wiring diagram of the speaker. The setting conditions of the winding direction are the same as those of FIG. 17a. When voice coil W and voice coil W _c 'are counterclockwise and voice coil W _B / and voice coil W _B2 ' are clockwise, the working conditions of the three voice coils are exactly the same as the requirements shown in Figure 18a. . Just set the absolute value of the inductance | L _A '| and | L _C ' | of the voice coil W _A 'and the voice coil W _e ' and the absolute value of the inductance | L _B1 'of the voice coil W _B and the voice coil W _B2 ' | And | L _B2 '1 are equal. In two parallel series circuits, because the winding directions of the two voice coils are opposite (phase difference 180 °), the voice coil W _A ' and the voice Coil W _B) ', voice coil W _c ' and voice coil W _B2 'can all offset each other in the best working state, that is, the phase difference of 180 ° is always maintained, so The speaker according to this embodiment will have a purely resistive load characteristic or a nearly purely resistive load characteristic, and the effect produced is exactly the same as the description of FIG. 17. As for the consequence of the magnetic field line edge effect that the outer magnetic gap and the central magnetic gap have different effects, refer to the related description of FIG. 17b.

Fig. 19 shows a longitudinal sectional view of an embodiment of a combined basin stand according to the present invention.

When the diameter of the voice coil of the speaker of the present invention is large (for example, up to Φ75ιηηι) or the diameter of the voice coil is too long (for example, the speaker has a pair of mutually exclusive magnets) or the speaker is designed with an ultra-long stroke, in order to increase the sound The axial movement of the ring is stable and prevents the "rubbing ring" from malfunctioning. The speaker basin frame can be replaced by another combined basin frame. The combined basin frame 1001 is composed of a frame 1001 _B and a bottom basin 1001 _A assembly. The frame 1001 _{Β is} provided with a ring-shaped support plane bonded to the conventional diaphragm 1006 and a ring-shaped support plane bonded to the fixed core support 1008 at the upper end of the speaker voice coil skeleton 1017 distributed at different axial heights. An open cylindrical body or the like is provided at the bottom end of the shaft center. The inner wall of the cylindrical body forms the inner mating surface 1033 of the recessed part of the basin frame 1001 and expands at the base part. It is a flange projecting outwards, and the bottom part of the shaft center of the base 1001 _A is also provided with a raised inner convex platform surface 1011. At an appropriate axial height, the open portion of the upper end of the basin 100 ^ is expanded into another flange protruding outward and matched with the flange of the frame _1001B . The inwardly convex platform is cast into a single body with the flange of the bottom basin 1001 _A by radial inwardly concave ribs 1099, and the inwardly concave ribs 1099 are evenly distributed on the circular shape of the bottom basin and the inwardly convex platform. On the plane, a sufficient air gap is provided between the ribs and the ribs for the operator to bond the voice coil skeleton 1017 and the lower end core support piece 1008 ', which further improves the ventilation and heat dissipation conditions of the voice coil. An annular horizontal support surface 1033 is also provided at the intersection of the concave rib 1099 and the flange of the basin 100 ^, and the lower end core fixing piece 1008 'of the speaker voice coil skeleton 1017 is bonded thereon. The frame 1001 _Β and the bottom basin 100 ^ are installed and positioned through the above-mentioned pair of flanges and connected to form a whole with sufficient rigidity. Since the loudspeaker of the present invention has extremely high sensitivity and output sound pressure, the technical scheme of setting two upper and lower fixed core supports also helps to increase the necessary damping coefficient and increase the transient response speed of the loudspeaker diaphragm. Undoubtedly, the embodiments of the embodiment related to the basin, the convex platform, and the concave ribs can also be applied to the replacement pages of the present invention only having a fixed core support (Article 26) The basin frame structure of an embodiment.

FIG. 20 shows a schematic diagram of installing and positioning the magnetic circuit core by using a fastener made of a non-magnetic conductive material evenly distributed on the flat plate in the embodiment of the speaker of the present invention.

It can be seen from Example 1, Example 2, Example 5, Example 6, Example 11 of the present invention that the magnetic circuit of the loudspeaker composed of three flat plates and one or more mutually exclusive magnets In the inner core, in addition to the bonding method already described in the present invention, a plurality of groups of fasteners 151 made of non-magnetic conductive material evenly distributed on the flat convex lip plane can be used in the speaker basin frame 101 The method of adding a matching screw hole 152 on the convex platform of the slab to install and locate the magnetic core of the magnetic circuit (the flat convex lip planes are provided with uniformly distributed holes on the flat surface of the convex plate, which is omitted in the present invention). For the sake of simplicity, the magnetic circuit components listed in this figure can be referred to the relevant description in Figure 1. Similarly, the method for mounting a magnetic circuit core in Embodiment 2, Embodiment 5, and Embodiment 6 of the present invention can be implemented by referring to the description of this figure.

Fig. 21 is a longitudinal sectional view showing a magnetic circuit of a speaker according to Embodiment 11 of the present invention.

This is a typical embodiment of the present invention provided with a pair of repulsive magnets and a pair of repulsive magnet circuits. For the sake of simplification, for any general speaker components that involve a basin stand, core support, dust cover, diaphragm, etc., the principle of the coaxial magnetic circuit, the orientation of the voice coil, and the working principle of the speaker, please refer to the drawings of the present invention. 1 Related description of Embodiment 1, which is not repeated in this embodiment.

This figure shows only the magnetic circuit portion of the eleventh embodiment. A pair of permanent magnets 012 'and 012 "are respectively positioned on the planes on both sides of the plate 013 _B , and two plates 013 _e and 013 _A are respectively installed on the outer planes of the pair of permanent magnets, and then the plate 013 A permanent magnet 012 is installed on the outer plane of the eighth, and then a flat plate 013 _D is installed on the outer plane of the permanent magnet 012.

The four coaxially mounted flat plates 013 _D , 013 _A , 013 _B , and 013 _c have the same projected area and are more coaxially mounted than the three permanent magnets 012, permanent magnets 012 ", and permanent magnets 012. 'The projection plane projects four symmetrical convex lip 0130 _D , convex lip 0130 _A , convex lip 0130 _B , convex lip 0130 _c . Two central flat plates 013 _A and flat 013 _B The axial thicknesses are equal to each other, and the two outer plates 013 _D and 013 are equal to each other. The thickness of the outer plates is 1/2 of the thickness of the center plate. The adjacent sides of the plate 013 _A and the plate 0138 have the same polarity, thereby forming three sets of repulsive magnets and three sets of repulsive magnetic circuits. A ring cylinder coaxially mounted with the above-mentioned plate and the above-mentioned permanent magnet. The inner peripheral surface of the shaped magnetic body 0113 and the outer peripheral surfaces of the four radially convex lips of the four flat plates constitute four magnetic gaps 0110 _D , 0U0 _A , 0110 _B, and 0110 _c . The four magnetic coils 019 _D , 019 _A , and 0 which are coaxially installed are inserted into the four magnetic gaps. 19 _B and voice coil 019 _c , for example, voice coil 019 _A and voice coil 019 _c are anticlockwise and voice coil 019 _D and voice coil 01 are clockwise. If all four voice coils are connected in parallel, The connection constitutes a pair of input terminals of the speaker. When audio current is input to the input terminals, each voice coil generates an electric force in the same direction at the same working instant F = F _A + F _B + F _C + F _D.

This icon shows the polarity and permanent magnetic field lines 三,, Ψ ₂ , and ¥ ₃ of three sets of repulsive magnets and three sets of repulsive magnetic circuits in the magnetic circuit. The current flow directions in the four voice coils are plotted as shown on the right side of this figure. Obviously, the local magnetic circuit diagram shown on the right side of FIG. 21 is the same as and consistent with FIG. 15, FIG. 17 a, and FIG. 18 a of the present invention. In order to better understand this embodiment, please refer to these existing related descriptions at the same time. If the permanent magnet in this embodiment is specified as a disc-shaped sintered neodymium-iron-boron permanent magnet, and it is also applied to a speaker of a small caliber (for example, a 3in to 5in caliber): Because the geometry of such a magnet replaces the page (the detailed rules 26 糸) The size is small, but the price is much cheaper than AlNiCo magnets, so it can produce speakers with extremely high output sound pressure with high performance price ratio and small size, and its SPL can easily reach 90 ~ 92dB / W. / m. Industrial applicability

In summary, the present invention has the following main advantages:

1. High sensitivity. Taking an 8-inch caliber Hi-Fi speaker as an example, the efficiency of electro-acoustic conversion can be improved by more than 10 times than that of a conventional Hi-Fi speaker after implementing the present invention.

2. High fidelity. In particular, speakers using rare-earth metal bonded permanent magnets and magnetic materials with high permeability and high resistivity.

3. The operating temperature of the voice coil has dropped significantly. Speakers work more reliably.

4. It is possible to make "linear" speakers with pure resistive load characteristics and easily reach large-scale production.

5. It is a green product with high performance and price ratio, high efficiency, energy saving and high consumption reduction. A comprehensive upgrade can be implemented for all types of speakers, including Hi-Fi speakers and professional speakers.

Replacement page (Article 26 糸)

Claims

Rights request

1. A loudspeaker comprising a magnetic circuit and a basin frame made of rigid material integrated with the magnetic circuit, a diaphragm and a fixed core support piece installed in the basin frame, and a cylinder connected to the diaphragm and the fixed core support piece. A magnetic skeleton, in which insulated wires are wound in parallel to form a voice coil inserted into a magnetic gap of a magnetic circuit, which is characterized in that a set of permanent magnets that are magnetically polarized in the thickness direction are installed on the two planes of a flat plate made of magnetic material. The permanent magnets have the same polarity on the side immediately adjacent to the flat plate, and a flat plate made of magnetic material is installed on the outer plane of the permanent magnet, respectively. A repulsive magnet, the three or more coaxially-mounted flat plates have the same projection area and project three or more outwards from the projection plane of the coaxially-mounted pair or permanent magnets A symmetrical lip, three or more between the inner peripheral surface of a ring-shaped cylindrical magnetic body mounted coaxially with the flat plate and the permanent magnet and the outer peripheral surface of the outer convex lip of the flat plate. Mentioned magnetic gap, A coaxially mounted voice coil is inserted into the magnetic gap, the winding direction of the voice coil and the direction of the current flowing through the voice coil are specified, so that the voice coil generates an electric force F in the same direction at the same working instant, A raised inwardly convex platform is provided at the bottom end portion of the basin frame, and the outer peripheral surface of the ring-shaped cylindrical magnetic body is fitted inside the recessed portion of the basin frame matching the inwardly convex platform surface, The basin stand is connected as a whole.

2. The loudspeaker according to claim 1, wherein: the flat plate is a circular flat plate with a central shaft hole, and the permanent magnet is a disc-shaped magnet with a central shaft hole or a plurality of fan-shaped sheets or A combination magnet composed of several ring magnets is provided with an axial hole at the axial center portion of the inwardly convex platform surface of the basin frame to match a pair of fasteners made of non-magnetically conductive material to connect the flat plate with the The permanent magnet is stacked on the convex platform surface, or an internal convex columnar body located at the axial center of the convex platform surface is integrally die-cast with the basin frame, and the flat plate and the The permanent magnet is stacked on the convex surface, and a gap formed by the fastener or the convex cylindrical body and the flat plate and the central shaft hole of the permanent magnet is filled with an adhesive to prevent The flat plate or the permanent magnet is eccentrically displaced, and the flat plate and the permanent magnet are connected with the basin frame as a whole.

3. The loudspeaker according to claim 1, characterized in that: the flat plate is a circular flat plate, the permanent magnet is a disc-shaped magnet or a combined magnet assembled by a plurality of fan-shaped sheets, and the flat plate is The permanent magnet and the inwardly convex platform surface of the basin frame and an innermost piece of the plate are manufactured by bonding or inserting a uniformly distributed non-magnetic material on a radially outwardly protruding lip of the plate. The fastener connects the flat plate and the permanent magnet with the basin frame into a whole.

4. A loudspeaker comprising a magnetic circuit and a basin frame made of rigid material integrated with the magnetic circuit, a diaphragm and a fixed core supporting piece installed in the basin frame, and a cylinder connected to the diaphragm and the fixed core supporting piece. A shaped skeleton, in which insulated wires are wound in parallel to form a voice coil inserted into a magnetic gap of a magnetic circuit, is characterized in that: a set of columnar rare earth metal bonded permanent magnets are respectively installed on two planes of a flat plate made of magnetic material, The permanent magnet is magnetically polarized by a columnar horizontal base facing a vertical peripheral surface of a radially outwardly protruding lip located at an upper end portion, and has the same polarity on the side of the base immediately adjacent to the flat plate, thereby forming a pair Or a pair of repulsive magnets, the flat plate coaxially mounted and the radially outwardly protruding lip of the upper end of the permanent magnet have the same projected area, and are more than two sets of coaxially mounted permanent magnet bases. The projection plane protrudes outwardly from a shapely lip, an inner peripheral surface of a ring-shaped cylindrical magnetic body mounted coaxially with the flat plate and the permanent magnet, and a radially outward convex lip of the flat plate and the permanent magnet. The upper end of the magnet projects radially outwardly Three or more of the magnetic gaps are formed between the outer peripheral surfaces, and coaxially mounted voice coils are inserted into the magnetic gaps, and the direction and flow of the voice coils are specified. Replacement page (Detailed Article 26) The direction of the current passing through the voice coil causes the voice coil to generate an electric force F in the same direction at the same working instant. A shaft center portion at the bottom end of the basin frame is provided with a rising convex platform, and the ring-shaped magnetic body The outer peripheral surface is fitted on the inside of the recessed portion of the basin frame matching the inwardly convex platform surface and is connected to the basin frame as a whole.

5. The loudspeaker according to claim 4, wherein: said flat plate is a circular flat plate having a central shaft hole, and said permanent magnet is a rare earth metal bonded permanent magnet having a central shaft hole. A shaft hole is provided at an axial center portion of the convex platform surface of the basin frame, and the flat plate and the permanent magnet are stacked on the convex platform surface by matching a pair of fasteners made of non-magnetic conductive material. Alternatively, a flat plate and the permanent magnet are superimposed on the inwardly convex platform surface by using an inwardly convex cylindrical body which is integrally die-cast with the basin frame and located at the axial center portion of the inwardly convex platform surface. The gap formed by the fastener or the convex cylindrical body and the central axis hole of the flat plate and the permanent magnet is filled with an adhesive to prevent the flat plate or the permanent magnet from being eccentrically displaced and the The flat plate and the permanent magnet are connected with the basin frame into a whole.

6. The loudspeaker according to claim 4, wherein the flat plate is a circular flat plate, the permanent magnet is a solid rare-earth metal bonded permanent magnet, and the flat plate and the permanent magnet are both bonded by The knot is connected with the convex platform of the basin frame into a whole.

7. A loudspeaker comprising a magnetic circuit and a basin frame made of rigid material integrated with the magnetic circuit, a diaphragm and a fixed core support piece installed in the basin frame, and a cylinder connected to the diaphragm and the fixed core support piece. A ring-shaped skeleton, in which insulated wires are wound in parallel and constitutes a voice coil inserted into a magnetic gap of a magnetic circuit, is characterized in that a set of ring-shaped cylindrical rare-earth metal bonding types are respectively installed on the two sides of a ring-shaped flat plate made of magnetic material. The permanent magnet is magnetically polarized by a ring-shaped cylindrical horizontal base facing a vertical peripheral surface of a radially inwardly-lipped lip located at an upper end portion, and has the same polarity on the side of the base immediately adjacent to the flat plate, ... A pair or more of repulsive magnets are thus formed, and the inner edge of the flat plate coaxially mounted has the same projected area as the radially inward convex lip of the upper end of the permanent magnet and is more coaxially mounted. The projection planes of the two sets of the permanent magnet bases protrude inwardly with a shapely lip, an outer peripheral surface of a ring-shaped cylindrical magnetic body mounted coaxially with the flat plate and the permanent magnet, and an inner convex lip of the flat plate Edge and upper end of the permanent magnet Three or more of the magnetic gaps are formed between the inner peripheral surfaces of the radially inwardly convex lip of the part, and a coaxially mounted voice coil is inserted into the magnetic gap to specify the direction and flow of the voice coil. The current direction of the voice coil causes the voice coil to generate electric force F in the same direction at the same working instant. The bottom end of the shaft of the basin frame is provided with a rising convex platform, the annular flat plate and the ring cylinder. The outer peripheral surface of the shape-shaped permanent magnet is fitted to the inside of the recessed portion of the basin frame matching the inwardly convex platform surface and is connected to the basin frame as a whole.

8. The loudspeaker according to claim 7, characterized in that: a shaft hole is provided at the axial center portion of the inwardly convex platform surface of the basin frame, and the fastener is made of a pair of fasteners made of a non-magnetic material to match the A ring-shaped cylindrical magnetic body is installed on the convex platform surface, or a ring-shaped cylindrical body located at the axial center of the convex platform surface is integrally die-cast with the basin frame, and A magnetic body is embedded in the convex surface, and a gap formed by the fastener or the convex cylindrical body and a central shaft hole of the ring-shaped cylindrical magnetic body is filled with an adhesive to prevent the The ring-shaped cylindrical magnetic body is eccentrically displaced and connected with the basin frame as a whole.

9. The loudspeaker according to claim 7, characterized in that: said ring-shaped cylindrical magnetic body can also be a ferrite core.

10, a ¾ sounder, including «and the iS ^ integrated with the« and fixed core support made of just attached materials, and ¾ and fixed (53: «tube-shaped bone parallel to it Twisting the wire of «« and forming «into the replacement page (Article 26) A voice coil with a magnetic circuit and a magnetic gap is characterized in that three end portions and a middle portion of a ring-shaped cylindrical rare earth metal-bonded permanent magnet are provided with three uniformly radially inwardly protruding lips, and the three inwardly convex lips The projected area is equal and the vertical peripheral surface of the two convex lip on the two sides at the ends of the middle convex lip is magnetically polarized by the vertical peripheral surface of the middle convex lip. A magnet, three or more of said magnets are formed between an outer peripheral surface of a ring-shaped cylindrical magnetic body mounted coaxially with said permanent magnet and an inner peripheral surface of said inner convex lip of said ring-shaped permanent magnet A gap, inserting a coaxially mounted voice coil in the magnetic gap, specifying the winding direction of the voice coil and the direction of the current flowing through the voice coil, so that the voice coil generates an electric force F in the same direction at the same working instant, A raised inwardly convex platform is provided at the bottom end portion of the center of the basin frame, and the outer peripheral surface of the ring-shaped cylindrical permanent magnet is fitted inside the concave portion of the basin frame matching the inwardly convex platform surface and It is connected with the basin frame as a whole.

11. The loudspeaker according to claim 10, characterized in that: a shaft hole is provided at an axial center portion of the inwardly convex platform surface of the basin frame, and a fastener made of a pair of non-magnetic conductive materials matches the fastener A ring-shaped cylindrical magnetic body is installed on the convex platform surface, or a ring-shaped cylindrical body located at the axial center of the convex platform surface is integrally die-cast with the basin frame, and A magnetic body is embedded in the convex surface, and a gap formed by the fastener or the convex cylindrical body and a central shaft hole of the ring-shaped cylindrical magnetic body is filled with an adhesive to prevent the The ring-shaped cylindrical magnetic body is eccentrically displaced and connected with the basin frame as a whole.

12. The loudspeaker according to claim 10, characterized in that the ring-shaped cylindrical magnetic body can also be a ferrite core.

13. A loudspeaker comprising a magnetic circuit and a basin frame made of rigid material integrated with the magnetic circuit, a diaphragm and a fixed core support piece installed in the basin frame, and a cylinder connected to the diaphragm and the fixed core support piece. A shaped skeleton, on which insulated wires are wound in parallel and constitutes a voice coil inserted into a magnetic gap of a magnetic circuit, is characterized in that three side ends of a columnar rare earth metal bonded permanent magnet and a middle part thereof are provided with three symmetrical radial outer portions. Convex lips, the projection areas of the three convex lips are equal, and the vertical circumference of the two convex lips at the ends of both sides is magnetically polarized by the vertical circumference of the middle convex lip, ...... Thereby, a pair or more of repulsive magnets are formed, between the inner peripheral surface of the ring-shaped cylindrical magnetic body mounted coaxially with the permanent magnet and the outer peripheral surface of the outer convex lip of the columnar permanent magnet. Form three or more magnetic gaps, insert a coaxially mounted voice coil into the magnetic gap, specify the direction of the voice coil and the direction of the current flowing through the voice coil, so that the voice coils are the same The electric force F in the same direction is generated instantaneously at work, the axis of the basin frame An end portion is provided with a raised convex platform, and the outer peripheral surface of the ring-shaped cylindrical magnetic body is fitted into the concave portion of the basin frame matching the convex platform surface and is connected with the basin frame to become A whole.

14. The loudspeaker according to claim 13, characterized in that: when the permanent magnet is a solid columnar permanent magnet, a raised convex platform surface is provided at the bottom end portion of the basin frame, and the inner The convex platform surface and the column bottom plane of the permanent magnet connect the permanent magnet and the basin frame into a whole by a bonding method.

15. The loudspeaker according to claim 13, characterized in that: when the permanent magnet is a hollow cylindrical permanent magnet, an axial hole is provided at the axial center portion of the convex platform surface of the basin frame, matching A pair of fasteners made of non-magnetic conductive material mount the permanent magnet on the convex platform surface, or use an integrated die-casting molding with the basin frame at the axial center portion of the convex platform surface. Root convex column, the permanent magnet is embedded on the convex platform, and the gap formed by the fastener or the convex column and the central shaft hole of the permanent magnet is filled with adhesive The binding agent prevents the permanent magnet from making eccentric displacement and connects it with the basin frame into a whole. Replacement page (by-law 26 糸)

16. The speaker specified in claim 1 or claim 4 or claim 7 or claim 10 or claim 13, characterized in that: the speaker has three of the magnetic gaps and forms a pair at different axial heights with full or nearly full symmetry of the symmetrical magnetic repulsive magnet and a repulsion magnetic circuit, is inserted into three equal cross-sectional area of the coil wire in the magnetic gap, when two voice coils located outside of the W _a and depending on the voice coil W _c-fitting the diaphragm outer direction with winding direction counterclockwise, centered W _B must have a coil winding direction clockwise, and vice versa, and the trailing end Y _a W _a of the coil said first end of the coil WB X _B series, the trailing end of the coil W _B Y _B of the end of the first coil W _c X _c in series, the voice coil W _c Y _c in the trailing end the voice coil bobbin perpendicular to the pair of head-end primer X _a configuration of the voice coil of the loudspeaker input terminal W _a, W _a voice coil and the coil W _c have equal number of turns n and n _a _c and equal inductances L _A and L _c , set the number of turns of the voice coil W _B n _B = n _A + n _e and set the absolute value of the inductance of the voice coil W _B IL _B I = IL _A i + IL _e |, the speaker is a speaker having a pure resistive load characteristic or a characteristic close to the pure resistive load characteristic.

17. A loudspeaker as defined in claim 1 or claim 4 or claim 7 or claim 10 or claim 13, characterized in that: the loudspeaker has three of said magnetic gaps and forms a pair at different axial heights A repulsive magnet and a repulsive magnetic circuit having fully symmetrical or nearly fully symmetrical magnetic properties, and inserting three voice coils having the same cross-sectional area of a conductor into the magnetic gap, and when the two voice coils are located on the outer side W _A 'and voice coil W _c ' have an anticlockwise direction when viewed from the outside of the diaphragm, and one of the centered voice coils W _B 'must have a clockwise direction, and vice versa. _{B 'is} 1/2 of the number of turns is provided at a center tap Y _B' and thereby constitutes the voice coil W _B1 'and voice coil W _B2', the voice coil W _a 'and the trailing end Y tone ring W _B1 'end of the first X _B1' connected in series, the voice coil W _e 'trailing end Y _c' and the voice coil W _B2 'end of the first X _B2' connected in series, the voice coil W _e ' the head end X _e 'vertically along said voice coil bobbin and the voice coil lead W _a' of the trailing end of the head end common _[alpha] [chi] 'and the voice coil is connected in parallel with the W _B1' and voice coil W _B2 'of Y _B 'constitutes A pair of input terminals of the speaker, the voice coil and the coil W w _e 'have equal number of turns n _A' and n _c 'and the equivalent inductance L _A' and L _c ', the voice coil W _B1' And the voice coil W _B2 'has an equal number of turns η _Β1 ' and η _Β2 'and an equal inductance L _B1 ' and L _B2 ', and sets the number of turns of the voice coil n _A ' = n _c '= n _B1 '= n _B2 ' and at the same time set the absolute value of the inductance of the voice coil | L _B1 '| = | L _B2 ' | = | L _A '|-| L _C ' | Load characteristics or speakers that are approximately purely resistive.

18. The loudspeaker as specified in claim 1 or claim 4 or claim 7 or claim 10 or claim 13, characterized in that: in order to increase the stability of the axial movement of the voice coil and prevent the occurrence of a "rubbing ring" failure The basin frame may be replaced by another combined basin frame. The combined basin frame is composed of a frame and a bottom basin assembly, and the frame is provided with the traditional diaphragms distributed at different axial heights. The support surface and the traditional support surface of the fixed core located at the upper end of the speaker voice coil skeleton, the bottom end portion of the frame is provided with an open cylinder or similar structure, and the inner wall of the cylinder A flange which forms the inside of the recessed part of the basin frame and expands outwardly at its base part; an axial convex part of the basin is provided with a raised convex platform, and the basin The open part of the upper end is extended to another flange protruding outward and correspondingly matches the flange of the frame, and the inward convex platform is connected with the bottom through radially indented concave ribs. The flange connection of the basin Integrally, an annular horizontal support surface is also provided at the junction between the rib and the flange, and the lower end fixed core support of the speaker voice coil skeleton is bonded to the frame and the bottom. The basin is installed and positioned through the pair of flanges and connected to form a whole.

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