CN2333135Y - Loudspeaker - Google Patents
Loudspeaker Download PDFInfo
- Publication number
- CN2333135Y CN2333135Y CN 97205593 CN97205593U CN2333135Y CN 2333135 Y CN2333135 Y CN 2333135Y CN 97205593 CN97205593 CN 97205593 CN 97205593 U CN97205593 U CN 97205593U CN 2333135 Y CN2333135 Y CN 2333135Y
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- voice coil
- flat board
- magnetic
- basin frame
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The utility model relates to a loudspeaker which belongs to the field of an electromechanical sensor in electricity. A pair of or more than one pair of repulsion type permanent magnets are arranged at both sides of a flat plate, and the other pole faces of the permanent magnets are provided with two flat plates whose the projected areas are equal to the projected area of the flat plate. Three magnet gaps and three voice rings are respectively formed among and inserted among the vertically peripheral surfaces of the outer sides of the three flat plates and the peripheral surfaces of the inner sides of magnetic bodies which are in an annular barrel shape and are arranged coaxially, and the winding direction of the voice rings and the current direction which flows across the voice rings are defined to make the electromotive force F of the voice rings in the same direction at the same time. The flat plates which are arranged at the middle and the magnetic bodies in an annular barrel shape are connected into a whole by the modification proposal, and two magnet gaps and a set of voice rings which are connected by connecting rods are formed at the outer sides of the flat plates and the magnetic bodies.
Description
The utility model relates to loud speaker, particularly uses the electrodynamic loudspeaker of a pair of and a pair of above pushing type permanent magnet, belongs to the pickoff field of electricity.
In the prior art, CN95101020.4 provides some kinds directly to be combined into magnetic circuit of loudspeaker with after one group of ring-type soft ferrite iron core and the coaxial installation of one group of ring-type rare earth metal binding type magnet, and the flow direction that inserts electric current in two voice coil loudspeaker voice coils and the regulation voice coil loudspeaker voice coil in two magnetic gaps of magnetic circuit makes each voice coil loudspeaker voice coil all can be in the stressed new solution of same direction.Because rare earth metal binding type magnet is the maximum magnetic energy product BH of neodymium iron boron series binding type magnet for example
MaxIn commercial Application, only reach 64 KJ/m
3About.Therefore, the insufficient sensitivity ideal of loud speaker is as adopting SmCo series binding type magnet, BH
MaxThough it is above to double, cost an arm and a leg, lack the commercial value of large-scale production.U.S. JBL, Inc. has adopted another kind of new solution: one group of ring-shaped magnetic core and another are organized by directly being combined into magnetic circuit of loudspeaker after a neodymium iron boron annular magnet and two coaxial installations of annular yoke, insert two voice coil loudspeaker voice coils in two magnetic gaps of magnetic circuit, the flow direction of electric current makes each voice coil loudspeaker voice coil all can be stressed in same direction in the regulation flowing through voice coil.The EON series bore that produces of technology is 15 in view of the above " loudspeaker unit, its sensitivity still can only reach about 98dB/W/m.
The purpose of this utility model is the weak point that overcomes above-mentioned prior art, under the prerequisite that does not increase the distortion factor, the sensitivity that improves loud speaker significantly is---the sound conversion efficiency, and can cover from the whole Hi-Fi and the professional loud speaker field of 3.5 " bore is until 24 " bore.
The purpose of this utility model reaches like this: a kind of loud speaker, comprise magnetic circuit and link the basin frame that all-in-one-piece is made of rigid material with it, be installed in the vibrating diaphragm in this basin frame and decide core and prop up sheet, with vibrating diaphragm and decide core and prop up the tubular skeleton that sheet is connected, wound in parallel lead insulated from each other also constitutes the voice coil loudspeaker voice coil that inserts the magnetic circuit magnetic gap on it, one or above thickness direction magnetize the permanent magnet installing and locating of polarization at the central part of the one flat plate of making of magnetic material, another piece or above thickness direction magnetize the permanent magnet installing and locating of polarization at the central part on the opposite side plane of described flat board, two blocks of described permanent magnets have identical polarity near this side of this described flat board, the flat board that magnetic material of difference installing and locating is made on the outer side plane of described two block permanent magnets, the projection plane that described coaxial mounted three flat boards have identical projected area and more coaxial mounted two blocks of described permanent magnets outwards protrudes out three uniform antelabium, constitute three described magnetic gaps between the outside vertical side face of the interior lateral circle surface of and described flat board and the coaxial mounted cylinder shape magnetic of described permanent magnet and the radially evagination antelabium of described flat board, in described magnetic gap, insert three coaxial installations and rigidly connected voice coil loudspeaker voice coil respectively, stipulate described voice coil loudspeaker voice coil around to and the sense of current of flowing through voice coil, make and produce unidirectional electric power F in the inherent at one time described magnetic gap of described three voice coil loudspeaker voice coils.When described permanent magnet is a disk shape more than one or one or cylindric or when having the solid permanent magnet of the sheet on regular polygon plane or column, place, axle center, bottom at described basin frame is provided with an inner concave platform face, described inner concave platform face and a most inboard described flat board insert the securing member that uniform nonmagnetic substance makes by bonding mode or on the evagination antelabium of described flat board makes described permanent magnet and described flat board and described basin frame connect to as a whole, the outer peripheral face of described cylinder shape magnetic is embedded in the recessed position of place, the nearly bottom of described basin bridge joint and described inner concave platform face coupling, and connects to as a whole by bonding mode or key pin mode and described basin frame.When described permanent magnet be one circular or when having the hollow permanent magnet of the sheet on regular polygon plane or column or the fan-shaped permanent magnet more than the combined hollow shape permanent magnet that constitutes in parallel, place, axle center, bottom at described basin frame is provided with an inner concave platform face and a convex column, also be provided with corresponding central axis hole on the described flat board, the interior lateral circle surface of described permanent magnet and the central axis hole of described flat board is embedded on the described convex column, and connect to as a whole by bonding or key pin mode and described basin frame, the outer peripheral face of described cylinder shape magnetic is embedded in described basin frame bottom and recessed position described convex column coupling, and connects to as a whole by bonding or key pin mode and described basin frame.
A kind of loud speaker, comprise magnetic circuit and link the basin frame that all-in-one-piece is made of rigid material with it, be installed in the vibrating diaphragm in this basin frame and decide core and prop up sheet, with vibrating diaphragm and decide core and prop up the tubular skeleton that sheet is connected, wound in parallel lead insulated from each other also constitutes the voice coil loudspeaker voice coil that inserts the magnetic circuit magnetic gap on it, a substrate---radially evagination antelabium direction magnetizes the substrate installing and locating of rare earth metal binding type permanent magnet of polarization at the central part of the one flat plate of making of magnetic material, the evagination antelabium direction of another piece substrate-radially magnetizes the substrate installing and locating of rare earth metal binding type permanent magnet of polarization at the central part on the opposite side plane of described flat board, has identical polarity at the bottom of two blocks of described permanent magnets this side group near this described flat board, the opposite side of described permanent magnet promptly is provided with radially, and the vertical outer peripheral face of evagination antelabium then has another polarity, constitute three described magnetic gaps between the vertical outer peripheral face with the radially evagination antelabium of the radially evagination antelabium of the interior lateral circle surface of described flat board and the coaxial mounted cylinder shape magnetic of described rare earth metal binding type permanent magnet and described flat board and described permanent magnet, in described magnetic gap, insert three coaxial installations and rigidly connected voice coil loudspeaker voice coil respectively, stipulate described voice coil loudspeaker voice coil around to and the sense of current of flowing through voice coil, make and produce unidirectional electric power F in the inherent at one time described magnetic gap of described three voice coil loudspeaker voice coils.When described rare earth metal binding type permanent magnet is a solid permanent magnet, place, axle center, bottom at described basin frame is provided with an inner concave platform face, described inner concave platform face and a most inboard described rare earth metal binding type permanent magnet have radially that this side plane of evagination antelabium makes described permanent magnet and described flat board and described basin frame connect to as a whole by bonding way, the described outer peripheral face that is the cylinder shape magnetic is embedded in the recessed position of place, the nearly bottom of described basin bridge joint and described inner concave platform face coupling, and connects to as a whole by bonding or key pin mode and described basin frame.When described rare earth metal binding type permanent magnet is a hollow permanent magnet, place, axle center, bottom at described basin frame is provided with an inner concave platform face and a convex column, also be provided with on the described flat board and the corresponding central axis hole of described permanent magnet, the interior lateral circle surface of described permanent magnet and the central axis hole of described flat board is embedded on the described convex column, and connect to as a whole by bonding or key pin mode and described basin frame, the outer peripheral face of described cylinder shape magnetic is embedded in described basin frame bottom and recessed position described convex column coupling, and connects to as a whole by bonding or key pin mode and described basin frame.Described cylinder shape magnetic is made of the soft ferrite core the described part magnetic gap of ferrite or described at least cylinder shape magnetic.
A kind of loud speaker, comprise magnetic circuit and link the basin frame that all-in-one-piece is made of rigid material with it, be installed in the vibrating diaphragm in this basin frame and decide core and prop up sheet, with vibrating diaphragm and decide core and prop up the tubular skeleton that sheet is connected, wound in parallel lead insulated from each other also constitutes the voice coil loudspeaker voice coil that inserts the magnetic circuit magnetic gap on it, it is characterized in that: one or above thickness direction magnetize the permanent magnet installing and locating of polarization at the central part of a mid-flat board of making of magnetic material, another piece or above thickness direction magnetize the permanent magnet installing and locating of polarization at the central part on the opposite side plane of described flat board, two blocks of described permanent magnets have identical polarity near this side of this described mid-flat board, the flat board that magnetic material of difference installing and locating is made on the outer side plane of described two block permanent magnets, the projection plane that coaxial mounted two described flat boards have identical projected area and more coaxial mounted two blocks of described permanent magnets outwards protrudes out two uniform evagination antelabium, one is slip with the interior lateral circle surface of described flat board and the coaxial mounted cylinder shape magnetic of described permanent magnet with the vertical outer peripheral face of described mid-flat board---interference fit, the interior lateral circle surface of described cylinder shape magnetic and constituted two described magnetic gaps between the outer vertical of the radially evagination antelabium of two described flat boards of Plane Installation location, the described permanent magnet outside, in described magnetic gap, insert two coaxial mounted voice coil loudspeaker voice coils, making rigidity by connecting rod between two voice coil loudspeaker voice coils links, connecting rod be distributed on speech coil framework around and pass the uniform aperture that is arranged on described mid-plate edge position, the regulation voice coil loudspeaker voice coil around to and the sense of current of flow path voice coil loudspeaker voice coil, the voice coil loudspeaker voice coil that produces unidirectional electric power F in the inherent at one time described magnetic gap of described two voice coil loudspeaker voice coils and make branch be in described mid-dull and stereotyped both sides by described connecting rod is synchronized with the movement.When described permanent magnet is a circular or disk shape more than one or one or cylindric or when having the solid permanent magnet of the sheet on positive multiform plane or column, place, axle center, bottom at described basin frame is provided with an inner concave platform face, described inner concave platform face and a most inboard described flat board insert the securing member that uniform nonmagnetic substance makes by bonding mode or on the evagination antelabium of described flat board makes described permanent magnet and described flat board and described basin frame connect to as a whole, the outer peripheral face of described cylinder shape magnetic is embedded in the recessed position of place, the nearly bottom of described basin bridge joint and described inner concave platform face coupling, and connects to as a whole by bonding or key pin mode and described basin frame.When described permanent magnet be one circular or when having the hollow permanent magnet of the sheet on regular polygon plane or column or the fan shape permanent magnet more than the combined hollow shape permanent magnet that constitutes in parallel, place, axle center, bottom at described basin frame is provided with an inner concave platform face and a convex column, also be provided with corresponding central axis hole on the described flat board, the interior lateral circle surface of described permanent magnet and the central axis hole of described flat board is embedded on the described convex column, and connect to as a whole by bonding or key pin mode and described basin frame, the outer peripheral face of described cylinder shape magnetic is embedded in described basin frame bottom and recessed position described convex column coupling, and connects to as a whole by bonding or key pin mode and described basin frame.
The explanation of accompanying drawing drawing:
Fig. 1. the loud speaker sectional arrangement drawing of the utility model embodiment 1.
Fig. 2. the loud speaker sectional arrangement drawing of the utility model embodiment 2.
Fig. 3. the loud speaker of the utility model embodiment 3 (magnetic circuit) sectional arrangement drawing.
Fig. 4. the loud speaker of the utility model embodiment 4 (magnetic circuit) sectional arrangement drawing.
Fig. 5. the loud speaker of the utility model embodiment 5 (magnetic circuit) sectional arrangement drawing.
Fig. 6. the loud speaker of the utility model embodiment 6 (magnetic circuit) sectional arrangement drawing.
Fig. 7. the loud speaker of the utility model embodiment 7 (magnetic circuit) sectional arrangement drawing.
Fig. 8. the loud speaker of the utility model embodiment 8 (magnetic circuit) sectional arrangement drawing.
Fig. 9. the loud speaker of the utility model embodiment 9 (magnetic circuit) sectional arrangement drawing.
Figure 10. the embodiment of the utility model permanent magnet (solid type) drawing in side sectional elevation.
Figure 11. the embodiment of the utility model permanent magnet (hollow type) drawing in side sectional elevation.
Figure 12. the scheme of installation of the utility model magnetic circuit inner core.
Figure 13. the A-A drawing in side sectional elevation of the utility model embodiment 5.
Figure 14. the utility model embodiment 1 node I partial enlarged drawing.
Figure 15. the utility model embodiment 5,6 node II partial enlarged drawings.
Figure 16. the loud speaker vertical section schematic diagram of the utility model embodiment 10.
The utility model main element and label corresponding relation are as follows:
101,201,301,401,501,601,701,801,901,1001---the basin frame;
12,22,32,42,52,62,72,82,92,1002---permanent magnet;
12 ', 22 ', 32 ', 42 ', 52 ', 62 ', 72 ', 82 ', 92 ', 1002 '---permanent magnet;
13,23,33,43,53,63,73,83,93 (
A, B, C)---flat board; 54,64,74---mid-flat board;
110,210,310,410,510,610,710,810,910,1010 (
A, B, C)---magnetic gap;
19,29,39,49,59,69,79,89,99,1009 (
A, B, C)---voice coil loudspeaker voice coil;
17,27,37,47,57,67,77,87,97,1017---speech coil framework;
111,211,311,411,511,611,711,811,911,1011---the inner concave platform face;
112,212,312,412,512,612,712,812,912,1012---the convex column;
113,213,313,413,513,613,713,813,913,1013---the cylinder shape magnetic;
214,414,614,714,814,914,1014---central axis hole;
130,230,330,430,530,630,930,1030 (
A, B, C)---evagination antelabium (flat board) radially;
20 (
A, B, C)---convex antelabium radially:
320,420,720---evagination antelabium (permanent magnet) radially; 516,616,716---connecting rod; 517,617,717---aperture;
320,42,520,620,720,820,920,1020,320 ', 420 ', 520 ', 620 ', 720 ', 820 ', 920,920 ', 1020 '---the permanent magnet substrate; 15,25,35---dust cover; 103,203,303,403,503,603,703,803,903,1003---basin frame recess mating surface;
Below in conjunction with drawings and Examples the utility model is further elaborated.
Fig. 1 shows the loud speaker sectional arrangement drawing of the utility model embodiment 1.
The hard material that cone type basin frame 101 adopts aluminium alloy or engineering plastics etc. to have enough rigidity is made, and it is slightly cup-shaped below waist.The bottom center axis place of cup has to the inside the hollow platform of projection, this inner concave platform face 111 be one with the symmetrically arranged horizontal plane of central axial line.The middle part of going up of cup is provided with a smooth and symmetrical recess mating surface 103, and it is coaxial and intersect vertically with aforesaid inner concave platform face 111.A good permeability magnetic material make circular dull and stereotyped 13
BCircular Nd-Fe-B permanent magnet 12 of central part place installing and locating of a side plane, dull and stereotyped 13
BThe opposite side plane the circular Nd-Fe-B permanent magnet 12 of another piece of central part place installing and locating ', generally speaking two block permanent magnets have that identical projection plane is long-pending, volume and magnetic energy product, but they are near dull and stereotyped 13
BA side all have identical polar (the utility model is set at the N utmost point), the outside of two block permanent magnets (being the S utmost point one side) be installing and locating flat board 13 respectively again
AAnd dull and stereotyped 13
C, generally speaking, dull and stereotyped 13A, dull and stereotyped 13C have identical thickness and are dull and stereotyped 13
BAbout half of thickness.Dull and stereotyped 13
A, dull and stereotyped 13
B, dull and stereotyped 13
CPermanent magnet of installing with a pair of shape that repels each other 12 and permanent magnet 12 ' all adopt adhesive bond to become an integral body in principle, promptly constitute the inner core of magnetic circuit of loudspeaker, by binding agent this inner core bonding is positioned on the inner concave platform face 111 again at last.To be cylinder shape magnetic 113 be embedded into the recess mating surface 103 of basin frame from the lateral direction of basin frame with the outer core of magnetic circuit, and after coaxial positioning bonded dose bonding firmly.Because permanent magnet 12,12 ' diameter dull and stereotyped 13
A, 13
B, 13
CDiameter slightly smaller, so above-mentioned three flat boards form symmetrical three evagination antelabium 130 radially after installing and locating
A, 130
BAnd 130
C, above-mentioned three radially the interior lateral circle surface of the outer vertical of evagination antelabium and cylinder shape magnetic 113 constitute three magnetic gaps 110
A, 110
B, 110
COwing on basin frame 101, be provided with the stop face that presets, as long as make the axial height and dull and stereotyped 130 of cylinder shape magnetic 113
A, 130
B, 130
CAnd permanent magnet 12,12 ' axial total height suitable, by foolproof positioning process and anchor clamps, the utility model just can be controlled above-mentioned three magnetic gaps 110 easily
A, 110
B, 110
CObtain enough uniformitys at circumferencial direction.In three magnetic gaps, insert voice coil loudspeaker voice coil 19 respectively
A, 19
B, 19
C, they have same speech coil framework 17.By shown in Figure 14, a magnetic gap 110 placed in the middle
B, its magnetic line of force direction serves as reasons dull and stereotyped 13
BRadially evagination antelabium 130
BPass voice coil loudspeaker voice coil 19 from the left side
BAgain through cylinder shape magnetic 113 minutes two-way and then from voice coil loudspeaker voice coil 19 up and down
A, 19
CThe right side pass magnetic gap 110
A, 110
C, through the radially evagination antelabium 130 of two outside flat boards
A, 130
CAnd dull and stereotyped 13
A, 13
CBe back to permanent magnet 12,12 ' the N utmost point.Therefore, present embodiment can be stipulated voice coil loudspeaker voice coil 19
A, 19
CAround to voice coil loudspeaker voice coil 19
B(180 ° of phase differences) on the contrary is with voice coil loudspeaker voice coil 19
A, 19
CAfter the series connection again with voice coil loudspeaker voice coil 19
BBe connected in parallel, it is about 1/2 that the total inductance amount of voice coil loudspeaker voice coil is reduced, impedance---and frequency response curve is more smooth and to guarantee at any time to be operated in the electric power F of three voice coil loudspeaker voice coils in the described magnetic gap equidirectional.
The top of speech coil framework 17 respectively with vibrating diaphragm 16, decide core and prop up sheet 18 and be connected, the latter is fixed on the annular flat table top that sound basin 101 provides with binding agent again.
Because present embodiment has adopted an a pair of repulsion type Nd-Fe-B permanent magnet and a shared middle flat board 13
B, the electric power F=F of speech coil framework-vibrating diaphragm
A+ F
B+ F
CSo,, can allow magnetic induction density B with three magnetic gaps
1Value designs too not highly, thereby, when reducing the magnetic circuit vortex flow effectively, the distortion factor of raising one's voice then is greatly improved than the sensitivity that the loud speaker that uses single Nd-Fe-B permanent magnetic iron circuit reduces loud speaker.
Fig. 2 shows the loud speaker sectional arrangement drawing of the utility model embodiment 2.
About basin frame, permanent magnet, flat board, radially evagination antelabium, cylinder shape magnetic, magnetic gap, voice coil loudspeaker voice coil, vibrating diaphragm, deciding core, to prop up the explanation of the elaboration of the connected mode of voice coil loudspeaker voice coil in the formation of structure member such as sheet and magnetic circuit and the magnetic gap and operation principle and Fig. 1 identical, present embodiment no longer gives repetition.Different with Fig. 1 is the flat board 23 of embodiment 2
A, 23
B, 23
CAnd Nd-Fe-B permanent magnet 12,12 ' central part be equipped with an equal diameters or suitable central axis hole 214, has a hollow platform of projection to the inside at the bottom center axis place of basin frame, this inner concave platform face 211 be one with the symmetrically arranged horizontal plane of axis, but a convex column 212 that intersects vertically with inner concave platform face 211 more to the inside swells at the axis position in the central, the central axis hole 214 of its cross section and described platform and permanent magnet is being slidingly matched of minim gap, by hot investment casting or follow-up mechanical processing technique, guarantee described convex column 212 outer peripheral faces and cylinder shape magnetic---the concentricity of basin frame recess mating surface 203 and with the perpendicularity of inner concave platform face 211, therefore present embodiment can further be simplified technology, need not to adopt special fixtures and directly assemble core inside and outside the magnetic circuit of loudspeaker, and once form three well-balanced magnetic gaps 210 of enough accuracy
A, 210
B, 210
C
Fig. 3 shows loud speaker (magnetic circuit) sectional arrangement drawing of the utility model embodiment 3.
3 inner cores to described magnetic circuit of loudspeaker of present embodiment promptly relate to the part of dull and stereotyped and permanent magnet and carry out the elaboration of complementarity.About basin frame, cylinder shape magnetic, magnetic gap, voice coil loudspeaker voice coil, vibrating diaphragm, deciding core, to prop up the connected mode and the embodiment 1 shown in operation principle and Fig. 1 of structure members such as sheet and voice coil loudspeaker voice coil identical, present embodiment 3 no longer gives repetition.As seen from Figure 3, embodiment 3 adopted a pair of repulsion type, be installed in dull and stereotyped 33
BThe neodymium iron boron binding type permanent magnet 32,32 of the T-shaped structure of both sides ', each piece neodymium iron boron binding type permanent magnet be equipped with the base plane 320 or 320 of a circle ', in axial height H value, described permanent magnet is that contour cylinder and its projected area equate, arrives behind the H value height permanent magnet and changes into and protrude out two evagination antelabium 320 radially uniformly laterally
A, 320
C, its vertical outer peripheral face be permanent magnet radially the thickness of evagination antelabium be dull and stereotyped 33 in principle
BAbout half of thickness, dull and stereotyped 33
BRadially evagination antelabium 330
B, with permanent magnet evagination antelabium 320 radially
A, 320
CIt is long-pending to have equal projection plane, by above-mentioned three radially the interior lateral circle surface of the periphery vertical plane of evagination antelabium and cylinder shape magnetic 313 constitute three described magnetic gaps of loud speaker.Similar to Fig. 1, near a permanent magnet 32 of basin frame inboard ' have radially this side plane of evagination antelabium, will be by positioning process and anchor clamps by permanent magnet 32,32 ' and dull and stereotyped 330
BBonding being positioned on the described inner concave platform face 311 of magnetic circuit inner core that constitutes.For avoiding taking place unnecessary leakage field loss, the convex hollow platform at the basin frame 301 of present embodiment and cup central axial line place, the end thereof all should adopt non-magnet material to make.Permanent magnet 32,32 ' the polarization of magnetizing occur in the permanent magnet substrate and radially between the evagination antelabium, as Fig. 3 indicates.This shows that compare with embodiment 1, embodiment 3 has cancelled the guiding flat board 13 of two permanent-magnet lines
A, 13
C, played the good effect of lowering dispersion loss and vortex flow loss.Particularly: described dull and stereotyped 33
BAnd cylinder shape magnetic 313 is if use the soft ferrite core of high permeability, high resistivity instead or when chilling amorphous alloy or chilling ultramicro-crystal alloy material, when the tone currents that flows through alternation in the voice coil loudspeaker voice coil particularly during the high audio electric current, the vortex flow that occurs in the magnetic circuit can obtain extremely significantly containing, has played reduction iron loss and raising on the one hand---the effect of sound conversion efficiency; On the other hand, the flatness of fundametal compoment (pure audio) the frequency response curve particularly high-end part of audio frequency will be improved greatly, the distortion factor of first-harmonic, second harmonic, triple-frequency harmonics also reduces thereupon significantly, thereby loud speaker is particularly dived in the medium-high frequency frequency response of heavy caliber specialty loud speaker, therefore make on the part-frequency point and move, can produce and have high output acoustic pressure, the very wide Hi-end level loud speaker of dynamic range.
Fig. 4 shows loud speaker (magnetic circuit) sectional arrangement drawing of the utility model embodiment 4.
In order to simplify technology and anchor clamps.The rare earth metal binding type permanent magnet 42,42 of present embodiment ' and dull and stereotyped 43
BBe equipped with an equal diameters or suitable central axis hole 414, has a hollow platform of projection to the inside at the bottom center axis place of basin frame 401, this inner concave platform face 411 be one with the symmetrically arranged horizontal plane of axis, but a convex column 412 that intersects vertically with inner concave platform face 411 more to the inside swells at the axis position in the central, the central axis hole 414 of its cross section and described platform and permanent magnet is being slidingly matched of minim gap, by hot investment casting or follow-up mechanical processing technique, guarantee described convex column 412 outer peripheral faces and cylinder shape magnetic---the concentricity of basin frame recess mating surface 403 and with the perpendicularity of inner concave platform face 411.All the other about structure, operation principle and embodiment illustrated in fig. 11 and the explanation of Fig. 2 embodiment 2, Fig. 3 embodiment 3 identical and no longer repeat.
Fig. 5 shows loud speaker (magnetic circuit) sectional arrangement drawing of the utility model embodiment 5.
It is a circle mid-dull and stereotyped 54 that the level of H type is pulled, it is by pressurization---and interference fit is imbedded the middle part of cylinder shape magnetic inwall of 1/2 axial height of cylinder shape magnetic 513, has the excellent contact face between the two and finally is placed in locating ring (Fig. 5 omits and the do not paint) cemented in place of mid-dull and stereotyped 54 both sides or directly locatees by adhesive bond.The a pair of permanent magnet that repels each other is mounted the central part that is positioned at mid-dull and stereotyped 54 two side planes, the substrate 520,520 of described permanent magnet ' have N polarity at present embodiment.Bonding respectively one circular dull and stereotyped 53 of the outer side plane of two block permanent magnets
A, 53
C, their projection plane is long-pending equate and be slightly larger than two blocks of isometrical permanent magnets 52,52 '.Near the most inboard one flat plate 53 of basin frame 501
COuter side plane and the inner concave platform face 511 of basin frame be adhesively fixed.Described cylinder shape magnetic 513 also embeds the recess mating surface 503 and the bonding with it location of basin frame when the described magnetic circuit inner core of bonding.Dull and stereotyped 53
A, 53
CRadially evagination antelabium 530
A, 530
CVertical outer peripheral face and the interior lateral circle surface of cylinder shape magnetic 513 between constitute two described magnetic gaps 510 of loud speaker
A, 510
CTwo speech coil framework 57,57 ' and voice coil loudspeaker voice coils 59 independently
A, 59
CInsert in above-mentioned two magnetic gaps, and by the aperture of evenly arranging along mid-dull and stereotyped 54 edges more than three 517 connecting rod 516 that three above non-magnet materials are made into is inserted within the apertures 517, the both ends of connecting rod 516 are with a coaxial mounted combined voice coil loudspeaker voice coil of two independent speech coil frameworks 57,57 being installed in mid-dull and stereotyped 54 both sides respectively ' connect to.As seen by above-mentioned, the flow direction of the magnetic line of force is identical in two magnetic gaps of present embodiment, promptly by described magnetic gap 510
A, 510
CInboard, lateral (being the magnetic circuit inner core) direction flow.Therefore, the direction of winding of two voice coil loudspeaker voice coils is (phase difference is 180 °) oppositely, imports tone currents after parallel connection again.The explanation of all the other structures about loud speaker, operation principle and embodiment 1 shown in Figure 1 is identical and no longer repeat.Figure 13 shows the A-A drawing in side sectional elevation of present embodiment 5, as seen from Figure 13, embodiment 5 is uniform four apertures 517 on mid-dull and stereotyped 54, split two of mid-dull and stereotyped 54 both sides independently coaxial installations of voice coil loudspeaker voice coil and by four connecting rods 516 that insert aperture described voice coil loudspeaker voice coil is linked and to become a combination voice coil loudspeaker voice coil.The connection lead of two voice coil loudspeaker voice coils also bonds together and omits in Fig. 5, Figure 13 and do not paint by connecting rod is parallel.
Fig. 6 shows loud speaker (magnetic circuit) sectional arrangement drawing of inventive embodiments 6.
The inner core of magnetic circuit is permanent magnet 62,62 ' and dull and stereotyped 63
A, 63
CIdentical with the relevant explanation of the embodiment 1 shown in the embodiment 2 shown in mid-dull and stereotyped 64 architectural feature and operation principle and Fig. 2 and the embodiment 5 shown in Fig. 5 and Fig. 1, present embodiment no longer gives repetition.Two interior flux loop of described magnetic gap can be consulted shown in Figure 15 in the present embodiment.
Fig. 7 shows loud speaker (magnetic circuit) sectional arrangement drawing of the utility model embodiment 7.
This is a kind of flexible program of embodiment illustrated in fig. 55 and embodiment illustrated in fig. 66.In the present embodiment, mid-dull and stereotyped 74 with cylinder shape magnetic 713 have integral structure, it can be made with the electrical pure iron or the ferroalloy of hot investment casting, also can make with soft magnetic ferrite material sintering.Permanent magnet 72,72 ' be having of a pair of repulsion type of central axis hole 714 and evagination antelabium 720 radially
A, 720
CNeodymium iron boron binding type permanent magnet.Other is partly identical with the relevant explanation of embodiment 5 shown in Figure 5 and embodiment 6 shown in Figure 6 and embodiment 3 shown in Figure 3, and present embodiment no longer gives repetition.
Fig. 8 shows loud speaker (magnetic circuit) sectional arrangement drawing of the utility model embodiment 8.
This is a kind of flexible program of the present utility model.The reduced of cylinder shape magnetic 813, and become a integrated member with central axis hole 814, it both can adopt soft ferrite to make, also can make, also can make with chilling amorphous alloy with high permeability and high resistivity or chilling ultracrystallite (amorphous) alloy with the ferroalloy materials of electrical pure iron or other good magnetic conduction.When installing and locating, the convex column 812 on the inner concave platform face 811 of the inboard side face embedding of the central axis hole of described cylinder shape magnetic 813 basin frame 801, and utilize binding agent that it is bonded on the inner concave platform face 811.1/2 axial height place of the rare earth metal binding type permanent magnet 82 of a cylinder shape has a radially convex antelabium 820
B, two lateral surface places that are equivalent to above-mentioned cylinder shape magnetic 813 axial heights of this permanent magnet are provided with radially convex antelabium 820 respectively
A, 820
CAnd guarantee radially convex antelabium 820
BIdentical (the H of axial height of horizontal center line and two outer side planes of described cylinder shape permanent magnet 82
8=H
8).Generally speaking, three of described cylinder shape permanent magnet 82 radially the convex antelabium have equal internal diameter and projected area, and convex antelabium 820 radially
A, 820
CThe rough radially convex antelabium 820 that equals of axial width
BAbout 1/2 of axial width.In the present embodiment, described cylinder shape permanent magnet 82 is by the polarity shown in Figure 8 polarization of magnetizing.When described cylinder shape permanent magnet 82 after side direction embeds the recessed position of basin frame mating surface 803 in by the lateral of basin frame 801, by aforesaid relevant technology of the utility model or anchor clamps, can constitute three enough, well-balanced described magnetic gaps 810 of precision at three of cylinder shape permanent magnet 82 radially between the outer peripheral face of the vertical inner peripheral surface of convex antelabium and cylinder shape magnetic 813
A, 810
B, 810
CIn above-mentioned magnetic gap, insert the voice coil loudspeaker voice coil 89 of speech coil framework 87 and three independent coilings
A, 89
B, 89
C, according to Fig. 1 embodiment 1 described operation principle, can make above-mentioned three voice coil loudspeaker voice coil electric power F at any time is same direction.Undoubtedly, it is similar that the flux loop in the present embodiment magnetic gap and Figure 14 are indicated, but permanent-magnet line direction is then just opposite.
Fig. 9 shows loud speaker (magnetic circuit) sectional arrangement drawing of the utility model embodiment 9.
This is again an another kind of flexible program of the present utility model.Fig. 9-a) is the modification of Fig. 1 embodiment 1.At this moment, the inner core of magnetic circuit of loudspeaker is made up of two pairs of repulsion type permanent magnets :-2 installing and locating of wherein a pair of thicker permanent magnet 92-2,92 ' are described dull and stereotyped 93
BNear described permanent magnet 92-1,92 '-1 the outside, the polar configurations of two pairs of permanent magnets and Fig. 1 embodiment 1 are identical on two side planes.Two flat boards 93 of difference installing and locating on the outer side plane of described permanent magnet 92-1,92 '-1,92-2,92 '-2
A, 93
CIn addition, about technical performances such as described permanent magnet and dull and stereotyped geometry, material requirement just the same with the relevant explanation of Fig. 1, thus, at the radially evagination antelabium 930 of described two flat boards
A, 930
B, 930
CVertical outer peripheral face and the interior lateral circle surface of cylinder shape magnetic 913 between constitute three magnetic gaps 910 of loud speaker
A, 910
B, 910
C, all the other are identical about explanation and Fig. 1 of speech coil framework, voice coil loudspeaker voice coil, basin shelf structure and operation principle.
Fig. 9-b) shows the another kind of modification of Fig. 1 embodiment 1.Different with Fig. 9-a) is; Dull and stereotyped 93
BThe permanent magnet 92-2,92 ' the-2nd of installing and locating on two side planes at central axial line position, a pair of thin repulsion type permanent magnet, is thick than the former near another of described permanent magnet 92-2,92 '-2 outside installing and locating then to repulsion type permanent magnet 92-1,92 '-1, all the other partly, Fig. 9-b) and Fig. 9-a) just the same.
Figure 10 shows the utility model permanent magnet and dull and stereotyped embodiment (solid type) drawing in side sectional elevation.(consulting Fig. 1 simultaneously)
Figure 10-a) has a solid circular permanent magnet 12, one piece circular dull and stereotyped 13
BAnd the radially evagination antelabium of forming thus 130
BFigure 10-b) has a solid hexagon permanent magnet 12, a regular hexagon flat board 13
BAnd the radially evagination antelabium of forming thus 130
BWith the annular magnetic gap 110 that is regular hexagon
BThe fan-shaped permanent magnet that Figure 10-c) has four homalographics composes in parallel the solid permanent magnet 12, a piece circular dull and stereotyped 13 of an equivalence
BAnd the radially evagination antelabium of forming thus 130
BBe circular magnetic gap 110
B
Figure 11 shows the utility model permanent magnet and dull and stereotyped embodiment (hollow type) cross-sectional view.(consulting Fig. 2 simultaneously)
The fan shape permanent magnet that Figure 11-a) has four homalographics, a uniform thickness is formed an equivalent hollow type permanent magnet 22, one piece circular dull and stereotyped 23
BAnd the radially evagination antelabium of forming thus 230
BWith circular magnetic gap 210
BFigure 11-b) has a regular hexagon permanent magnet of offering central axis hole 214 22, a regular hexagon flat board 23
BAnd the radially evagination lip level of forming thus 230
BWith the annular magnetic gap 210 that is regular hexagon
B
Figure 12 shows the scheme of installation of the utility model magnetic circuit inner core.Consult Fig. 1, Fig. 5, Fig. 9-a), Fig. 9-b) as seen, the described magnetic circuit inner core of loud speaker that constitutes by described three flat boards and a pair of or a pair of above repulsion type permanent magnet, except that the mull technique that above stated specification has been set forth, can also adopt securing member 151 that non-magnet material makes and the way of on the inner concave platform of described speaker frame 101, setting up screw 152 that above-mentioned magnetic circuit inner core is given installing and locating.The element numbers that Figure 12 shows can be consulted Fig. 1 explanation.
Figure 14, Figure 15 show the node I of the utility model embodiment 1 and the node II partial enlarged drawing of embodiment 6 respectively.Described dull and stereotyped 13 of magnetic circuit of loudspeaker
BOr described mid-dull and stereotyped 54/64 with the radially evagination antelabium 130 of permanent-magnet line by described flat board
BPass through described magnetic gap 110 from left to right
BOr the vertical side face of the radial outside of described mid-flat board and be divided into up and down the cylinder shape magnetic 113 or 513/613 that two branch roads flow into described magnetic circuit, pass through described magnetic gap 110 through right direction then
A, 110
CAnd 510
A/ 610
A, 510
C/ 610
C, through described radially evagination antelabium 130
A, 130
CAnd 530
A/ 630
A, 530
C/ 630
CAnd described flat board be back to permanent magnet 12,12 ' and 52/62,52 '/62 ', want factor if ignore the edge effect grade of leakage flux and different magnetic gaps, can think that the magnetic flux of Figure 14, the middle magnetic circuit that passes through magnetic gap and voice coil loudspeaker voice coil from left to right shown in Figure 15 should equal the magnetic flux sums in two outside magnetic circuits that this magnetic circuit passes through magnetic gap and voice coil loudspeaker voice coil from right to left.Set thus described voice coil loudspeaker voice coil around to and flowing through voice coil in the sense of current, make in described voice coil loudspeaker voice coil the synchronization that imports tone currents, the electric power F that described voice coil loudspeaker voice coil produces in described magnetic gap is equidirectional: promptly for node I F=F
A1+ F
B1+ F
C1For node II: F=F
A2+ F
C2
Figure 16 shows the local vertical section schematic diagram of the utility model embodiment 10.
In the present embodiment, basin frame 1003 is by chimeric basin bottom part 1003A and basin framework 1003
BForm.Chimeric surface roughly is located at aforesaid inner concave platform face 1011 following positions.Basin bottom part up and down after chimeric and basin framework can become an integral body or the form by similar ring flange to be tightened to as a whole member with screw or bolt even rivet with adhesive bond.Different with previous embodiment 1 to embodiment 9 is: the basin bottom part 1003A of present embodiment is strengthened near the diameter of inner concave platform face 1011, and on the certain axial height of described basin bottom part default Horizontal Branch bearing surface 1033 that intersects vertically with central axial line, on it the bonding second decide core prop up sheet 1018 ', this decides core and props up sheet 1018 ' connect to one with the medial end of described speech coil framework 1017, with this adapt to some ultra-long-stroke loudspeaker voice coil desirability and improve this type of voice coil loudspeaker voice coil and stability and the damping action of speech coil framework under the axial motion state.
In sum, the utlity model has following major advantage:
1, high sensitivity, " and above loudspeaker electro-acoustic conversion efficiency can meet or exceed 10% to bore 15.
2, high fidelity. Particularly adopted the magnetic material of rare earth metal binding type permanent magnet and high permeability, high resistivity The loudspeaker of material.
3, the flatness of pressure frequency response curve and impedance frequency response curve is improved greatly.
4, the low temperature rise of the voice coil loudspeaker voice coil of loud speaker, it is highly reliable to work.
5, be the green product of a kind of energy-efficient, high consumption reduction, high performance-price ratio.Can implement comprehensively upgrading to traditional Hi-Fi and professional loud speaker.
Claims (10)
1, a kind of loud speaker, comprise magnetic circuit and link the basin frame that all-in-one-piece is made of rigid material with it, be installed in the vibrating diaphragm in this basin frame and decide core and prop up sheet, with vibrating diaphragm and decide core and prop up the tubular skeleton that sheet is connected, wound in parallel lead insulated from each other also constitutes the voice coil loudspeaker voice coil that inserts the magnetic circuit magnetic gap on it, it is characterized in that: one or above thickness direction magnetize the permanent magnet installing and locating of polarization at the central part of the one flat plate of making of magnetic material, another piece or above thickness direction magnetize the permanent magnet installing and locating of polarization at the central part on the opposite side plane of described flat board, two blocks of described permanent magnets have identical polarity near this side of this described flat board, the flat board that magnetic material of difference installing and locating is made on the outer side plane of described two block permanent magnets, the projection plane that described coaxial mounted three flat boards have identical projected area and more coaxial mounted two blocks of described permanent magnets outwards protrudes out three uniform antelabium, constitute three described magnetic gaps between the outside vertical side face of the interior lateral circle surface of and described flat board and the coaxial mounted cylinder shape magnetic of described permanent magnet and the radially evagination antelabium of described flat board, in described magnetic gap, insert three coaxial installations and rigidly connected voice coil loudspeaker voice coil respectively, stipulate described voice coil loudspeaker voice coil around to and the sense of current of flowing through voice coil, make and produce unidirectional electric power F in the inherent at one time described magnetic gap of described three voice coil loudspeaker voice coils.
2, loud speaker according to claim 1 regulation, it is characterized in that: when described permanent magnet is a disk shape more than one or one or cylindric or when having the solid permanent magnet of the sheet on regular polygon plane or column, place, axle center, bottom at described basin frame is provided with an inner concave platform face, described inner concave platform face and a most inboard described flat board insert the securing member that uniform nonmagnetic substance makes by bonding mode or on the evagination antelabium of described flat board makes described permanent magnet and described flat board and described basin frame connect to as a whole, the outer peripheral face of described cylinder shape magnetic is embedded in the recessed position of place, the nearly bottom of described basin bridge joint and described inner concave platform face coupling, and connects to as a whole by bonding mode or key pin mode and described basin frame.
3, loud speaker according to claim 1 regulation, it is characterized in that: when described permanent magnet be one circular or when having the hollow permanent magnet of the sheet on regular polygon plane or column or the fan-shaped permanent magnet more than the combined hollow shape permanent magnet that constitutes in parallel, place, axle center, bottom at described basin frame is provided with an inner concave platform face and a convex column, also be provided with corresponding central axis hole on the described flat board, the interior lateral circle surface of described permanent magnet and the central axis hole of described flat board is embedded on the described convex column, and connect to as a whole by bonding or key pin mode and described basin frame, the outer peripheral face of described cylinder shape magnetic is embedded in described basin frame bottom and recessed position described convex column coupling, and connects to as a whole by bonding or key pin mode and described basin frame.
4, a kind of loud speaker, comprise magnetic circuit and link the basin frame that all-in-one-piece is made of rigid material with it, be installed in the vibrating diaphragm in this basin frame and decide core and prop up sheet, with vibrating diaphragm and decide core and prop up the tubular skeleton that sheet is connected, wound in parallel lead insulated from each other also constitutes the voice coil loudspeaker voice coil that inserts the magnetic circuit magnetic gap on it, it is characterized in that: substrate one by one radially evagination antelabium direction magnetize the substrate installing and locating of rare earth metal binding type permanent magnet of polarization at the central part of the one flat plate of making of magnetic material, another piece substrate one by one radially evagination antelabium direction magnetize the substrate installing and locating of rare earth metal binding type permanent magnet of polarization at the central part on the opposite side plane of described flat board, has identical polarity at the bottom of two blocks of described permanent magnets this side group near this described flat board, the opposite side of described permanent magnet promptly is provided with radially, and the vertical outer peripheral face of evagination antelabium then has another polarity, constitute three described magnetic gaps between the vertical outer peripheral face with the radially evagination antelabium of the radially evagination antelabium of the interior lateral circle surface of described flat board and the coaxial mounted cylinder shape magnetic of described rare earth metal binding type permanent magnet and described flat board and described permanent magnet, in described magnetic gap, insert three coaxial installations and rigidly connected voice coil loudspeaker voice coil respectively, stipulate described voice coil loudspeaker voice coil around to and the sense of current of flowing through voice coil, make and produce unidirectional electric power F in the inherent at one time described magnetic gap of described three voice coil loudspeaker voice coils.
5, loud speaker according to claim 4 regulation, it is characterized in that: when described rare earth metal binding type permanent magnet is a solid permanent magnet, be provided with an inner concave platform at place, the axle center, bottom of described basin frame and, described inner concave platform face and a most inboard described rare earth metal binding type permanent magnet have radially that this side plane of evagination antelabium makes described permanent magnet and described flat board and described basin frame connect to as a whole by bonding way, the described outer peripheral face that is the cylinder shape magnetic is embedded in the recessed position of place, the nearly bottom of described basin bridge joint and described inner concave platform face coupling, and connects to as a whole by bonding or key pin mode and described basin frame.
6, loud speaker according to claim 4 regulation, it is characterized in that: when described rare earth metal binding type permanent magnet is a hollow permanent magnet, place, axle center, bottom at described basin frame is provided with an inner concave platform face and a convex column, also be provided with on the described flat board and the corresponding central axis hole of described permanent magnet, the interior lateral circle surface of described permanent magnet and the central axis hole of described flat board is embedded on the described convex column, and connect to as a whole by bonding or key pin mode and described basin frame, the outer peripheral face of described cylinder shape magnetic is embedded in described basin frame bottom and recessed position described convex column coupling, and connects to as a whole by bonding or key pin mode and described basin frame.
7, according to the loud speaker of claim 4 regulation, it is characterized in that: described cylinder shape magnetic is made of the soft ferrite core the described part magnetic gap of ferrite or described at least cylinder shape magnetic.
8, a kind of loud speaker, comprise magnetic circuit and link the basin frame that all-in-one-piece is made of rigid material with it, be installed in the vibrating diaphragm in this basin frame and decide core and prop up sheet, with vibrating diaphragm and decide core and prop up the tubular skeleton that sheet is connected, wound in parallel lead insulated from each other also constitutes the voice coil loudspeaker voice coil that inserts the magnetic circuit magnetic gap on it, it is characterized in that: one or above thickness direction magnetize the permanent magnet installing and locating of polarization at the central part of a mid-flat board of making of magnetic material, another piece or above thickness direction magnetize the permanent magnet installing and locating of polarization at the central part on the opposite side plane of described flat board, two blocks of described permanent magnets have identical polarity near this side of this described mid-flat board, the flat board that magnetic material of difference installing and locating is made on the outer side plane of described two block permanent magnets, the projection plane that coaxial mounted two described flat boards have identical projected area and more coaxial mounted two blocks of described permanent magnets outwards protrudes out two uniform evagination antelabium, one is the interference fit one by one of sliding with the interior lateral circle surface of described flat board and the coaxial mounted cylinder shape magnetic of described permanent magnet with the vertical outer peripheral face of described mid-flat board, the interior lateral circle surface of described cylinder shape magnetic and constituted two described magnetic gaps between the outer vertical of the radially evagination antelabium of two described flat boards of Plane Installation location, the described permanent magnet outside, in described magnetic gap, insert two coaxial mounted voice coil loudspeaker voice coils, making rigidity by connecting rod between two voice coil loudspeaker voice coils links, connecting rod be distributed on speech coil framework around and pass the uniform aperture that is arranged on described mid-plate edge position, the regulation voice coil loudspeaker voice coil around to and the sense of current of flow path voice coil loudspeaker voice coil, the voice coil loudspeaker voice coil that produces unidirectional electric power F in the inherent at one time described magnetic gap of described two voice coil loudspeaker voice coils and make branch be in described mid-dull and stereotyped both sides by described connecting rod is synchronized with the movement.
9, loud speaker according to claim 8 regulation, it is characterized in that: when described permanent magnet is a circular or disk shape more than one or one or cylindric or when having the solid permanent magnet of the sheet on positive multiform plane or column, place, axle center, bottom at described basin frame is provided with an inner concave platform face, described inner concave platform face and a most inboard described flat board insert the securing member that uniform nonmagnetic substance makes by bonding mode or on the evagination antelabium of described flat board makes described permanent magnet and described flat board and described basin frame connect to as a whole, the outer peripheral face of described cylinder shape magnetic is embedded in the recessed position of place, the nearly bottom of described basin bridge joint and described inner concave platform face coupling, and connects to as a whole by bonding or key pin mode and described basin frame.
10, loud speaker according to claim 8 regulation, it is characterized in that: when described permanent magnet be one circular or when having the hollow permanent magnet of the sheet on regular polygon plane or column or the fan shape permanent magnet more than the combined hollow shape permanent magnet that constitutes in parallel, place, axle center, bottom at described basin frame is provided with an inner concave platform face and a convex column, also be provided with corresponding central axis hole on the described flat board, the interior lateral circle surface of described permanent magnet and the central axis hole of described flat board is embedded on the described convex column, and connect to as a whole by bonding or key pin mode and described basin frame, the outer peripheral face of described cylinder shape magnetic is embedded in described basin frame bottom and recessed position described convex column coupling, and connects to as a whole by bonding or key pin mode and described basin frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97205593 CN2333135Y (en) | 1997-12-12 | 1997-12-12 | Loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97205593 CN2333135Y (en) | 1997-12-12 | 1997-12-12 | Loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2333135Y true CN2333135Y (en) | 1999-08-11 |
Family
ID=33925789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97205593 Expired - Fee Related CN2333135Y (en) | 1997-12-12 | 1997-12-12 | Loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2333135Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009103247A1 (en) | 2008-02-21 | 2009-08-27 | Zhang Fan | Inner magnetic transducer with multiple magnectic gaps and multiple coils and preparation method thereof |
| US9294843B2 (en) | 2007-10-13 | 2016-03-22 | Fan Zhang | Multimedia acoustics system having audio frequency digital interface |
| CN108737938A (en) * | 2017-04-20 | 2018-11-02 | 深圳市三诺数字科技有限公司 | A kind of dual-drive speaker device |
-
1997
- 1997-12-12 CN CN 97205593 patent/CN2333135Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9294843B2 (en) | 2007-10-13 | 2016-03-22 | Fan Zhang | Multimedia acoustics system having audio frequency digital interface |
| WO2009103247A1 (en) | 2008-02-21 | 2009-08-27 | Zhang Fan | Inner magnetic transducer with multiple magnectic gaps and multiple coils and preparation method thereof |
| CN108737938A (en) * | 2017-04-20 | 2018-11-02 | 深圳市三诺数字科技有限公司 | A kind of dual-drive speaker device |
| CN108737938B (en) * | 2017-04-20 | 2024-01-23 | 深圳市三诺数字科技有限公司 | Dual-drive loudspeaker device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1121809C (en) | Loudspeaker | |
| CN1219834A (en) | Loudspeaker | |
| CN102892063B (en) | Multiple driver transducer with symmetrical magnetic circuits and symmetric coil circuit | |
| US9277325B2 (en) | Inner magnetic transducer with multiple magnetic gaps and multiple coils and preparation method thereof | |
| CN101971645B (en) | Inner magnetic transducer with multiple magnectic gaps and multiple coils and preparation method thereof | |
| CN101026901A (en) | Double-coil dual magnetic gap transducer | |
| CN1121300A (en) | Loudspeaker with magnetic circuit | |
| EP1703765A3 (en) | Electro-acoustic converter with demountable diaphragm and voice coil assembly | |
| TW201309049A (en) | Driver for transducer with two magnets, two magnetic gaps and two coils | |
| CN105840727B (en) | A kind of adjustable rigidity mechanism of axial magnetic coupling | |
| WO2001015493A1 (en) | Double coils and double magnetic gaps transducer | |
| CN200941682Y (en) | Double-coil double-magnetic gap transducer | |
| CN2333135Y (en) | Loudspeaker | |
| CN102387450A (en) | Dual-magnetic-gap dual-coil external-magnetic transducer and preparation method thereof | |
| CN2822084Y (en) | Inner magnet type energy changer driver with resistance negative load property | |
| CN1119918C (en) | Double-coil double-magnet gap transducer | |
| CN1152601C (en) | Shorting rings in dual-coil dual-gap loudspeaker drivers | |
| CN2373961Y (en) | Loudspeaker | |
| CN202310081U (en) | Voice coil and loudspeaker with same | |
| CN209057358U (en) | A kind of loudspeaker magnet steel | |
| CN110536224A (en) | The assemble method of magnetic circuit structure for loudspeaker | |
| CN2406437Y (en) | Linear long-stroke loudspeaker | |
| CN1207010A (en) | Loudspeaker and preparation method | |
| CN2334129Y (en) | Loud-speaker | |
| CN1025481C (en) | High energy activator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |