WO1999031931A1 - Haut-parleur - Google Patents

Haut-parleur Download PDF

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Publication number
WO1999031931A1
WO1999031931A1 PCT/CN1998/000306 CN9800306W WO9931931A1 WO 1999031931 A1 WO1999031931 A1 WO 1999031931A1 CN 9800306 W CN9800306 W CN 9800306W WO 9931931 A1 WO9931931 A1 WO 9931931A1
Authority
WO
WIPO (PCT)
Prior art keywords
voice coil
permanent magnet
magnetic
flat plate
basin frame
Prior art date
Application number
PCT/CN1998/000306
Other languages
English (en)
Chinese (zh)
Inventor
Fan Zhang
Original Assignee
Fan Zhang
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fan Zhang filed Critical Fan Zhang
Priority to AU14812/99A priority Critical patent/AU1481299A/en
Publication of WO1999031931A1 publication Critical patent/WO1999031931A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction

Definitions

  • 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.
  • 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.
  • 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
  • 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.
  • 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.
  • 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.
  • 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.
  • 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
  • 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.
  • 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, ...
  • 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.
  • the flat plate is a circular flat plate with a central shaft hole
  • 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.
  • the flat plate is a circular flat plate
  • the permanent magnet is a solid rare earth metal bonded permanent magnet
  • 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 ffi3 ⁇ 43 ⁇ 4 ⁇ , ⁇ ⁇ ⁇ 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.
  • 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, ...
  • 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.
  • 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.
  • 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, ...
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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
  • 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 '
  • the basin frame 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.
  • 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 ⁇ 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.
  • FIG. 18 A magnetic circuit and circuit diagram showing a second embodiment of the present invention having a purely resistive load vocal horn! 3 ⁇ 4 Wire Replacement Page (Details 26 ⁇ ) 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 ⁇
  • Fig. 1 shows a longitudinal sectional view of a speaker according to the first embodiment of the present invention.
  • 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 ⁇ ). 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.
  • 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.
  • 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.
  • 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 13 ⁇ 4 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 '.
  • 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
  • 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
  • the phase difference between the two sets of voice coils is 180 °.
  • the voice coil may also be 19 A, the voice coil 1, coil 19 e all connected in parallel.
  • 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.
  • 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 ⁇ ) Conversion efficiency has been greatly improved.
  • 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.
  • 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 .
  • 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
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • alternating audio currents especially high audio currents
  • the voice coil 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 ⁇ ) 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.
  • 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 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.
  • 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.
  • Fig. 8 is a longitudinal sectional view of a speaker according to an eighth embodiment of the present invention.
  • 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.
  • a symmetrical radial outward lip 1520 B is provided at one-half the axial height of this group of columnar permanent magnets, 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.
  • 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.
  • 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.
  • 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 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 .
  • 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.
  • 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 ⁇ 20B.
  • the convex lip 1720 A , the convex lip ⁇ 20 ⁇ , 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).
  • 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.
  • 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.
  • 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;
  • 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 (3 ⁇ 4 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.
  • FIG. 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.
  • FIG. 13 is a cross-sectional view of a magnetic circuit according to Embodiment 8 of the present invention (see FIG. 8).
  • 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.
  • 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.
  • FIG. 16 shows a partially enlarged view of the node II of Embodiment 7 (Embodiment 10) of the present invention.
  • node II 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.
  • 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.
  • the circuit principle wiring diagram of the voice coil any one can be selected according to several embodiments of the present invention.
  • 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.
  • 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 (3 ⁇ 4 See Figure 1 to the replacement page (Details Article 26) ⁇ ).
  • 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
  • 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,
  • 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 .
  • 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 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.
  • Fig. 17b shows the circuit principle wiring diagram of the speaker.
  • 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.
  • 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.
  • 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.
  • 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 °.
  • the load characteristics of the above speakers may become approximately pure resistance.
  • the corresponding frequency-impedance response curve may also become an approximate straight line.
  • 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.
  • 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. ⁇ ).
  • 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.
  • 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.
  • 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
  • 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)
  • 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 implementation method of the voice coil vertical lead is exactly the same as that described in FIG. 17a.
  • 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.
  • 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. .
  • L B2 '1 are equal.
  • 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.
  • 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.
  • 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 ⁇ 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.
  • 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.
  • 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 ⁇ 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.
  • 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
  • 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).
  • Fig. 21 is a longitudinal sectional view showing a magnetic circuit of a speaker according to Embodiment 11 of the present invention.
  • 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.
  • FIG. 11 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.
  • This icon shows the polarity and permanent magnetic field lines ⁇ ,, ⁇ 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.
  • 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.
  • 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 ⁇ ) 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
  • the present invention has the following main advantages:

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  • Acoustics & Sound (AREA)
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Abstract

L'invention concerne un haut-parleur. Une ou plusieurs paires d'aimants répulsifs sont montées sur les deux côtés d'un méplat, un autre méplat est monté sur le plan polaire dudit aimant, ce qui forme trois ou plusieurs fentes magnétiques entre les surfaces des au moins trois méplats et les surfaces de corps magnétiques annulaires placés de manière coaxiale. Une bobine vocale est insérée dans les fentes magnétiques. Le sens d'enroulement de la bobine vocale et le sens du courant qui la traverse sont prédéterminés de manière que ladite bobine vocale produise une force électromotrice dans le même sens et au même instant. Le haut-parleur comprenant une paire d'aimants répulsifs est caractérisé en ce que les aimants sont parfaitement symétriques et présentent des circuits d'aimants répulsifs. La définition du nombre de tours, de l'inductance et du genre de câblage confère audit haut-parleur une charge de résistance pure.
PCT/CN1998/000306 1997-12-12 1998-12-11 Haut-parleur WO1999031931A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU14812/99A AU1481299A (en) 1997-12-12 1998-12-11 Loudspeaker

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
CN 97107820 CN1219834A (zh) 1997-12-12 1997-12-12 扬声器
CN97107820.3 1997-12-12
CN97205644 1997-12-19
CN97205644.0 1997-12-19
CN98228401 1998-03-06
CN98228401.2 1998-03-06
CN98249859.4 1998-12-09
CN98249859 1998-12-09

Publications (1)

Publication Number Publication Date
WO1999031931A1 true WO1999031931A1 (fr) 1999-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN1998/000306 WO1999031931A1 (fr) 1997-12-12 1998-12-11 Haut-parleur

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CN (2) CN1219834A (fr)
AU (1) AU1481299A (fr)
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Cited By (5)

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EP1227701A1 (fr) * 2000-08-24 2002-07-31 Matsushita Electric Industrial Co., Ltd. Haut-parleur et circuit magnetique correspondant utilise
WO2009046682A1 (fr) 2007-10-13 2009-04-16 Fan Zhang Système acoustique multimédia ayant une interface numérique à fréquence audio
WO2009103247A1 (fr) 2008-02-21 2009-08-27 Zhang Fan Transducteur magnétique interne comprenant de multiples entrefers magnétiques et de multiples bobines et procédé de préparation de ce dernier
CN106792402A (zh) * 2017-03-18 2017-05-31 歌尔股份有限公司 动磁式扬声器
FR3123533A1 (fr) * 2021-05-31 2022-12-02 Devialet Moteur de Haut-parleur à deux aimants opposés

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CN101400010B (zh) * 2007-09-29 2012-03-21 马钧 一种新型音频转换器
CN201274572Y (zh) * 2008-10-10 2009-07-15 张凡 具有音频数字接口的多媒体音响系统
CN103379413A (zh) * 2012-04-12 2013-10-30 鄂雨松 双音圈双磁体动圈式扬声器
WO2015000167A1 (fr) * 2013-07-05 2015-01-08 Huang Lai-Shi Nouvelle structure de boucle magnétique de haut-parleur
CN105282662B (zh) * 2015-11-09 2019-01-22 黄顺君 一种与双绕组反并动圈同构同工的双径向磁路
CN105338454B (zh) * 2015-11-20 2018-11-09 瑞声光电科技(常州)有限公司 长冲程扬声器
CN108600920A (zh) * 2018-01-08 2018-09-28 深圳市韶音科技有限公司 一种骨传导扬声器
CN109348378A (zh) * 2018-10-18 2019-02-15 北京新能源汽车股份有限公司 一种扬声器及汽车
CN110620985B (zh) * 2019-09-27 2020-08-25 厦门三立电子有限公司 一种小型钕铁硼带磁粘合工艺
CN114466289B (zh) * 2022-02-18 2024-03-12 歌尔股份有限公司 扬声器和电子设备
CN114466288B (zh) * 2022-02-18 2024-03-12 歌尔股份有限公司 扬声器和电子设备

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WO1994003026A1 (fr) * 1992-07-17 1994-02-03 Linaeum Corporation Tranducteur audio ayant une bobine mobile realisee par une attaque chimique
JPH06233383A (ja) * 1993-02-03 1994-08-19 Foster Electric Co Ltd スピーカ

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WO1992009180A1 (fr) * 1990-11-16 1992-05-29 Stage Accompany B.V. Haut-parleur a bobine mobile enrobee
WO1994003026A1 (fr) * 1992-07-17 1994-02-03 Linaeum Corporation Tranducteur audio ayant une bobine mobile realisee par une attaque chimique
JPH06233383A (ja) * 1993-02-03 1994-08-19 Foster Electric Co Ltd スピーカ

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1227701A1 (fr) * 2000-08-24 2002-07-31 Matsushita Electric Industrial Co., Ltd. Haut-parleur et circuit magnetique correspondant utilise
EP1227701A4 (fr) * 2000-08-24 2005-12-07 Matsushita Electric Ind Co Ltd Haut-parleur et circuit magnetique correspondant utilise
WO2009046682A1 (fr) 2007-10-13 2009-04-16 Fan Zhang Système acoustique multimédia ayant une interface numérique à fréquence audio
US9294843B2 (en) 2007-10-13 2016-03-22 Fan Zhang Multimedia acoustics system having audio frequency digital interface
WO2009103247A1 (fr) 2008-02-21 2009-08-27 Zhang Fan Transducteur magnétique interne comprenant de multiples entrefers magnétiques et de multiples bobines et procédé de préparation de ce dernier
CN106792402A (zh) * 2017-03-18 2017-05-31 歌尔股份有限公司 动磁式扬声器
CN106792402B (zh) * 2017-03-18 2022-06-03 歌尔股份有限公司 动磁式扬声器
FR3123533A1 (fr) * 2021-05-31 2022-12-02 Devialet Moteur de Haut-parleur à deux aimants opposés
EP4099717A1 (fr) * 2021-05-31 2022-12-07 Devialet Moteur de haut-parleur à deux aimants opposés
US11979726B2 (en) 2021-05-31 2024-05-07 Devialet Speaker driver with two opposite magnets

Also Published As

Publication number Publication date
CN1219834A (zh) 1999-06-16
CN1278399A (zh) 2000-12-27
AU1481299A (en) 1999-07-05

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