CN101931847A - Thin type speaker based on multi-step magnetic yoke - Google Patents
Thin type speaker based on multi-step magnetic yoke Download PDFInfo
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- CN101931847A CN101931847A CN2010102679080A CN201010267908A CN101931847A CN 101931847 A CN101931847 A CN 101931847A CN 2010102679080 A CN2010102679080 A CN 2010102679080A CN 201010267908 A CN201010267908 A CN 201010267908A CN 101931847 A CN101931847 A CN 101931847A
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- magnetic yoke
- voice coil
- conductive magnetic
- basin
- sound basin
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Abstract
The invention relates to a thin type speaker based on a multi-step magnetic yoke. The speaker comprises frames with basin-shaped cavities, magnetic circuit structures installed in the frames, a cone and dampers and is characterized in that the centers of the bottoms of the frames are provided with through holes; the magnetic yoke comprises a lower segment with first external diameter, a middle segment with second external diameter and an upper segment with third external diameter; the lower segment of the magnetic yoke is closely embedded in the through holes; the external surface of the bottom of the magnetic yoke is at the same level with the external surfaces of the bottoms of the frames; the external wall between the middle segment and the lower segment of the magnetic yoke forms an external step; the magnetic yoke is supported on the bottoms of the frames by the external step; the internal wall between the upper segment and the middle segment of the magnetic yoke forms an internal step; the dampers are arranged in the magnetic yoke; the external edges of the dampers are supported on the internal step; and the internal edges of the dampers are closely jointed with the external walls of voice coils. The speaker has ingenious, compact and reasonable structure, greatly optimizes the thickness under the premise of not substantially changing the acoustic performance and has thinner structure.
Description
Technical field
The invention belongs to the electroacoustic techniques field, relate to a kind of loud speaker, specifically a kind of thin speaker based on multi-step magnetic yoke.
Background technology
Loud speaker involving vibrations system and magnetic structure.In the prior art, the vibrational system that is applied to the loud speaker on the plate video equipments such as LCD, PDP generally adopts infundibulate sound basin to cooperate the structure of locating branch slice: offer centre bore at the center of infundibulate sound basin, the locating branch slice that offers centre bore equally is arranged on the below of sound basin, voice coil loudspeaker voice coil penetrates the centre bore of sound basin and locating branch slice, combining closely in the interior edge of the outer wall of voice coil loudspeaker voice coil and sound basin and locating branch slice, thereby forms the vibrational system of loud speaker.And conventional magnetic structure generally is with the magnet centering, the conductive magnetic yoke (also claiming U iron) that is the U type around the magnet around a section, voice coil loudspeaker voice coil places between magnet and the conductive magnetic yoke, and U type conductive magnetic yoke is arranged on the outer surface of basin frame bottom surface, and locating branch slice is arranged on the conductive magnetic yoke upper periphery.Voice coil loudspeaker voice coil energising back promotes sound basin double vibrations vertically, to external radiation sound.Adopt the loadspeaker structure of above technology thicker, can't be applicable on the more ultra-thin panel TV such as LED liquid crystal.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide that a kind of structure is ingenious, the thin speaker of compact and reasonable, this loud speaker is greatly optimized loud speaker thickness under the prerequisite that changes acoustic performance not significantly, make its structure thinner.
According to technical scheme provided by the invention, described thin speaker based on multi-step magnetic yoke comprises basin frame with basin shape chamber, is installed in magnetic structure, sound basin and locating branch slice in the basin frame; Described magnetic structure comprises conductive magnetic yoke, magnet, magnetic pole core and voice coil loudspeaker voice coil, and conductive magnetic yoke and basin frame are combined closely, and magnet and magnetic pole core are contained in the conductive magnetic yoke, and magnet lower surface and conductive magnetic yoke bottom interior surface are combined closely, the magnet upper surface magnetic pole core of combining closely; Voice coil loudspeaker voice coil is looped around around magnet and the magnetic pole core, and the outer wall of voice-coil inwall and magnet and magnetic pole core leaves the gap, and voice coil loudspeaker voice coil outer wall and conductive magnetic yoke inwall leave the space; Described sound basin outer is supported on the basin frame edge, combines closely in sound basin bottom part and voice coil loudspeaker voice coil top; It is characterized in that: described basin frame bottom centre offers through hole, and described conductive magnetic yoke comprises hypomere with first external diameter, have the stage casing of second external diameter and have the epimere of the 3rd external diameter; The external diameter of conductive magnetic yoke hypomere equals through-hole diameter, and the height of conductive magnetic yoke hypomere equals the thickness of basin frame bottom, and the conductive magnetic yoke hypomere closely is inlaid in the through hole, and the conductive magnetic yoke bottom outer surface is concordant with basin frame bottom outer surface; The external diameter in conductive magnetic yoke stage casing is greater than the external diameter of conductive magnetic yoke hypomere, and the outer wall between conductive magnetic yoke stage casing and the hypomere forms an outer step, and conductive magnetic yoke is supported on basin frame bottom by this outer step; The internal diameter of conductive magnetic yoke epimere is greater than the internal diameter in conductive magnetic yoke stage casing, and the inwall between conductive magnetic yoke epimere and the stage casing forms step in; Described locating branch slice is arranged on conductive magnetic yoke inside, and on the step, combined closely with the voice coil loudspeaker voice coil outer wall in the interior edge of locating branch slice in the outer of locating branch slice was supported on.
As a further improvement on the present invention, it is tabular that described sound basin is flat thin, and the sound basin comprises the sound basin ring of sound basin body and annular, combines closely in sound basin body lower surface and voice coil loudspeaker voice coil top, the outer of sound basin body is interior along being connected with sound basin ring, and the outer of sound basin ring is supported on the basin frame edge.
As a further improvement on the present invention, the interior edge at described basin frame edge is concaved with a ring annular groove, and the outer of described sound basin is supported in this cannelure.
As a further improvement on the present invention, the damping material that described sound basin adopts thin thickness, good rigidly, have a suitable internal damping is made, and preferably adopts birch to make.
As a further improvement on the present invention, the cross section of described sound basin ring is the circular arc to lower recess.
As a further improvement on the present invention, the outer of described locating branch slice is risen and fallen by export-oriented center position and extends, and forms one and is wavy locating branch slice curved surface.
The present invention compared with prior art, advantage is: ingenious, the compact and reasonable of structure, by changing the installation site of conductive magnetic yoke structure and locating branch slice, make the further slimming of magnetic structure of loud speaker, under the situation of guaranteeing loud speaker tonequality and reliability, reduced the height of loud speaker significantly.
Description of drawings
Fig. 1 is the structural representation of the preferred embodiment of the present invention.
Fig. 2 is the perspective view of conductive magnetic yoke among Fig. 1.
Description of reference numerals: step, 3-magnet, 4-magnetic pole core, 5-locating branch slice, 6-voice coil loudspeaker voice coil, 7-sound basin, 7a-sound basin body, 7b-sound basin ring in 1-basin frame, 1a-basin frame edge, 1b-through hole, 1c-cannelure, 2-conductive magnetic yoke, 2a-hypomere, 2b-stage casing, 2c-epimere, the outer step of 2d-, the 2e-.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
As shown in the figure, the thin speaker among the embodiment mainly is made up of basin frame 1, conductive magnetic yoke 2, magnet 3, magnetic pole core 4, locating branch slice 5, voice coil loudspeaker voice coil 6 and sound basin 7.
As Fig. 1～shown in Figure 2, the periphery of described basin frame 1 is basin frame edge 1a, and basin frame edge 1a inwardly has the basin shape chamber of a depression; The bottom centre of basin frame 1 offers through hole 1b; The interior edge of basin frame edge 1a is concaved with a ring annular groove 1c.
As Fig. 1～shown in Figure 2, in the described basin frame 1 magnetic structure, sound basin 7 and locating branch slice 5 are installed; Magnetic structure mainly is made up of conductive magnetic yoke 2, magnet 3, magnetic pole core 4 and voice coil loudspeaker voice coil 6; Sound basin 7 outers are supported on the basin frame edge 1a, combine closely in sound basin 7 bottoms and voice coil loudspeaker voice coil 6 tops; Locating branch slice 5 is arranged on the below of sound basin 7, and the voice coil loudspeaker voice coil 6 in the magnetic structure penetrates the centre bore of locating branch slice 5, combines closely in the interior edge of the outer wall of voice coil loudspeaker voice coil 6 and locating branch slice 5.
As Fig. 1～shown in Figure 2, described conductive magnetic yoke 2 is combined closely with basin frame 1, and conductive magnetic yoke 2 comprises the hypomere 2a with first external diameter, the stage casing 2b with second external diameter and the epimere 2c with the 3rd external diameter; The external diameter of conductive magnetic yoke 2 hypomere 2a equals the through hole 1b diameter of basin frame 1 bottom centre, the height of conductive magnetic yoke 2 hypomere 2a equals the thickness of basin frame 1 bottom, conductive magnetic yoke 2 hypomere 2a closely are inlaid in the through hole 1b, and conductive magnetic yoke 2 bottom outer surfaces are concordant with basin frame 1 bottom outer surface; The external diameter of conductive magnetic yoke 2 stage casing 2b is greater than the external diameter of conductive magnetic yoke 2 hypomere 2a, and the outer wall between conductive magnetic yoke 2 stage casing 2b and the hypomere 2a forms an outer step 2d, and conductive magnetic yoke 2 is supported on basin frame 1 bottom by this outer step 2d; The internal diameter of conductive magnetic yoke 2 epimere 2c is greater than the internal diameter of conductive magnetic yoke 2 stage casing 2b, and the inwall between conductive magnetic yoke 2 epimere 2c and the stage casing 2b forms step 2e in.Among the present invention the top of conductive magnetic yoke 2 should be as far as possible away from the lower surface of sound basin 7.
As Fig. 1～shown in Figure 2, described magnet 3 and magnetic pole core 4 are contained in the conductive magnetic yoke 2, and magnet 3 lower surfaces and conductive magnetic yoke 2 bottom interior surfaces are combined closely, the magnet 3 upper surfaces magnetic pole core 4 of combining closely; Voice coil loudspeaker voice coil 6 is looped around around magnet 3 and the magnetic pole core 4, and the outer wall of voice coil loudspeaker voice coil 6 inwalls and magnet 3 and magnetic pole core 4 leaves the gap, and voice coil loudspeaker voice coil 6 outer walls and conductive magnetic yoke 2 inwalls leave the space.
As Fig. 1～shown in Figure 2, it is tabular that described sound basin 7 is flat thin, sound basin 7 comprises the sound basin ring 7b of sound basin body 7a and annular, combine closely in sound basin body 7a lower surface and voice coil loudspeaker voice coil 6 tops, the outer of sound basin body 7a is interior along being connected with sound basin ring 7b's, the outer of sound basin ring 7b is supported in the cannelure 1c on edge in the basin frame edge 1a, and the setting of cannelure 1c makes the compacter slimming of the overall structure of loud speaker.Preferably, the cross section of described sound basin ring 7b is the circular arc to lower recess, thereby makes loud speaker have good vibration characteristics.
As Fig. 1～shown in Figure 2, described locating branch slice 5 is arranged on conductive magnetic yoke 2 inside, and the outer of locating branch slice 5 is supported on the interior step 2e that conductive magnetic yoke 2 epimere 2c and stage casing 2b form, and combines closely with voice coil loudspeaker voice coil 6 outer walls in the interior edge of locating branch slice 5.The outer of described locating branch slice 5 is risen and fallen by export-oriented center position and extends, and forms one and is wavy locating branch slice 5 curved surfaces, and it is thin to have structure, and the advantage that compliance is good helps making voice coil loudspeaker voice coil to be linear oscillator, reduces distortion, guarantees loud speaker tonequality.
The damping material that sound basin 7 among the present invention should adopt thin thickness, good rigidly, have a suitable internal damping is made; The preferred birch that adopts is made.
Claims (7)
1. based on the thin speaker of multi-step magnetic yoke, comprise basin frame (1), be installed in magnetic structure, sound basin (7) and locating branch slice (5) in the basin frame (1) with basin shape chamber; Described magnetic structure comprises conductive magnetic yoke (2), magnet (3), magnetic pole core (4) and voice coil loudspeaker voice coil (6), conductive magnetic yoke (2) is combined closely with basin frame (1), magnet (3) and magnetic pole core (4) are contained in the conductive magnetic yoke (2), magnet (3) lower surface and conductive magnetic yoke (2) bottom interior surface are combined closely, magnet (3) the upper surface magnetic pole core (4) of combining closely; Voice coil loudspeaker voice coil (6) is looped around magnet (3) and magnetic pole core (4) on every side, and the outer wall of voice coil loudspeaker voice coil (6) inwall and magnet (3) and magnetic pole core (4) leaves the gap, and voice coil loudspeaker voice coil (6) outer wall and conductive magnetic yoke (2) inwall leave the space; Described sound basin (7) outer is supported on the basin frame edge (1a), combines closely with voice coil loudspeaker voice coil (6) top in sound basin (7) bottom; It is characterized in that: described basin frame (1) bottom centre offers through hole (1b), and described conductive magnetic yoke (2) comprises the hypomere (2a) with first external diameter, the stage casing (2b) with second external diameter and the epimere (2c) with the 3rd external diameter; The external diameter of conductive magnetic yoke (2) hypomere (2a) equals through hole (1b) diameter, the height of conductive magnetic yoke (2) hypomere (2a) equals the thickness of basin frame (1) bottom, conductive magnetic yoke (2) hypomere (2a) closely is inlaid in the through hole (1b), and conductive magnetic yoke (2) bottom outer surface is concordant with basin frame (1) bottom outer surface; The external diameter in conductive magnetic yoke (2) stage casing (2b) is greater than the external diameter of conductive magnetic yoke (2) hypomere (2a), outer wall between conductive magnetic yoke (2) stage casing (2b) and the hypomere (2a) forms an outer step (2d), and conductive magnetic yoke (2) was by being supported on basin frame (1) bottom by outer step (2d); The internal diameter of conductive magnetic yoke (2) epimere (2c) is greater than the internal diameter in conductive magnetic yoke (2) stage casing (2b), and the inwall between conductive magnetic yoke (2) epimere (2c) and stage casing (2b) forms step (2e) in; Described locating branch slice (5) is arranged on conductive magnetic yoke (2) inside, and the outer of locating branch slice (5) is supported on the interior step (2e), combines closely with voice coil loudspeaker voice coil (6) outer wall in the interior edge of locating branch slice (5).
2. the thin speaker based on multi-step magnetic yoke as claimed in claim 1, it is characterized in that: it is tabular that described sound basin (7) is flat thin, sound basin (7) comprises the sound basin ring (7b) of sound basin body (7a) and annular, combine closely in sound basin body (7a) lower surface and voice coil loudspeaker voice coil (6) top, the outer of sound basin body (7a) is interior along being connected with sound basin ring (7b), and the outer of sound basin ring (7b) is supported on the basin frame edge (1a).
3. the thin speaker based on multi-step magnetic yoke as claimed in claim 1 is characterized in that: the interior edge at described basin frame edge (1a) is concaved with a ring annular groove (1c), and the outer of described sound basin (7) is supported in this cannelure (1c).
4. the thin speaker based on multi-step magnetic yoke as claimed in claim 1 is characterized in that: described sound basin (7) adopts damping material to make.
5. the thin speaker based on multi-step magnetic yoke as claimed in claim 4 is characterized in that: described damping material is selected birch for use.
6. the thin speaker based on multi-step magnetic yoke as claimed in claim 1 is characterized in that: the cross section of described sound basin ring (7b) is the circular arc to lower recess.
7. the thin speaker based on multi-step magnetic yoke as claimed in claim 1 is characterized in that: the outer of described locating branch slice (5) is risen and fallen by export-oriented center position and extends, and forms one and is wavy locating branch slice (5) curved surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010267908 CN101931847B (en) | 2010-08-26 | 2010-08-26 | Thin type speaker based on multi-step magnetic yoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010267908 CN101931847B (en) | 2010-08-26 | 2010-08-26 | Thin type speaker based on multi-step magnetic yoke |
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| Publication Number | Publication Date |
|---|---|
| CN101931847A true CN101931847A (en) | 2010-12-29 |
| CN101931847B CN101931847B (en) | 2013-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010267908 Active CN101931847B (en) | 2010-08-26 | 2010-08-26 | Thin type speaker based on multi-step magnetic yoke |
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| CN (1) | CN101931847B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792382A (en) * | 2016-12-27 | 2017-05-31 | 厦门东声电子有限公司 | A kind of receiver or loudspeaker for lifting electroacoustic performance |
| CN112237010A (en) * | 2018-08-13 | 2021-01-15 | 谷歌有限责任公司 | Actuator with reduced thickness |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001346290A (en) * | 2000-06-05 | 2001-12-14 | Alpine Electronics Inc | Loudspeaker |
| CN201499298U (en) * | 2009-07-07 | 2010-06-02 | 陈奚平 | loudspeaker |
| CN101742385A (en) * | 2009-12-24 | 2010-06-16 | 无锡杰夫电声有限公司 | Thin type electrodynamic loudspeaker |
| CN201758446U (en) * | 2010-08-26 | 2011-03-09 | 无锡杰夫电声有限公司 | Thin loudspeaker based on multi-step magnetic conductive yoke |
-
2010
- 2010-08-26 CN CN 201010267908 patent/CN101931847B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001346290A (en) * | 2000-06-05 | 2001-12-14 | Alpine Electronics Inc | Loudspeaker |
| CN201499298U (en) * | 2009-07-07 | 2010-06-02 | 陈奚平 | loudspeaker |
| CN101742385A (en) * | 2009-12-24 | 2010-06-16 | 无锡杰夫电声有限公司 | Thin type electrodynamic loudspeaker |
| CN201758446U (en) * | 2010-08-26 | 2011-03-09 | 无锡杰夫电声有限公司 | Thin loudspeaker based on multi-step magnetic conductive yoke |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792382A (en) * | 2016-12-27 | 2017-05-31 | 厦门东声电子有限公司 | A kind of receiver or loudspeaker for lifting electroacoustic performance |
| CN106792382B (en) * | 2016-12-27 | 2022-09-16 | 厦门东声电子有限公司 | Telephone receiver or loudspeaker for improving electroacoustic performance |
| CN112237010A (en) * | 2018-08-13 | 2021-01-15 | 谷歌有限责任公司 | Actuator with reduced thickness |
| CN112237010B (en) * | 2018-08-13 | 2022-02-25 | 谷歌有限责任公司 | Actuator, mobile device and wearable device |
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| Publication number | Publication date |
|---|---|
| CN101931847B (en) | 2013-05-29 |
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Address after: 214192 Xishan, Jiangsu, Beizhen Tin Tin Tin Road, No. eight, No. 228 Patentee after: WUXI JIEFU ELECTROACOUSTIC CO., LTD. Address before: 214192 eight Wuxi, Beizhen, Xishan District, Jiangsu Patentee before: Jiefu Electroacoustic Co., Ltd., Wuxi |