CN201758446U - Thin loudspeaker based on multi-step magnetic conductive yoke - Google Patents
Thin loudspeaker based on multi-step magnetic conductive yoke Download PDFInfo
- Publication number
- CN201758446U CN201758446U CN 201020511091 CN201020511091U CN201758446U CN 201758446 U CN201758446 U CN 201758446U CN 201020511091 CN201020511091 CN 201020511091 CN 201020511091 U CN201020511091 U CN 201020511091U CN 201758446 U CN201758446 U CN 201758446U
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- CN
- China
- Prior art keywords
- magnetic yoke
- voice coil
- conductive magnetic
- basin
- sound basin
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- 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 - Lifetime
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Abstract
The utility model relates to a thin loudspeaker based on a multi-step magnetic conductive yoke, wherein the thin loudspeaker comprises a speaker frame with a basin-shaped cavity, a magnetic circuit structure installed in the speaker frame, a cone and a damper, and is characterized in that the center of the bottom of the speaker frame is provided with a through hole, the magnetic conductive yoke comprises a lower section with a first external diameter, an intermediate section with a second external diameter and an upper section with a third external diameter, the lower section of the magnetic conductive yoke is tightly inserted in the through hole, an outer surface of the bottom of the magnetic conductive yoke is aligned with that of the bottom of the speaker frame, an outer wall between the intermediate section and the lower section of the magnetic conductive yoke forms an outer step, the magnetic conductive yoke is supported at the bottom of the speaker frame via the outer step, an inner wall between the upper section and the intermediate section of the magnetic conductive yoke forms an inner step, the damper is arranged in the magnetic conductive yoke, the outer edge of the damper is supported on the inner step, and the inner edge of the damper is tightly combined with an outer wall of a voice coil. The thin loudspeaker based on the multi-step magnetic conductive yoke of the utility model has an ingenious, compact and reasonable structure, and enables to greatly optimize the thickness of the loudspeaker so that the structure of the loudspeaker is thinner on the premise that the acoustic performance is not significantly changed.
Description
Technical field
The utility model belongs to the electroacoustic techniques field, relates 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 purpose of this utility model is to overcome the deficiencies in the prior art, provides that a kind of structure is ingenious, the thin speaker of compact and reasonable, and this loud speaker is greatly optimized loud speaker thickness under the prerequisite that changes acoustic performance not significantly, make its structure thinner.
According to the technical scheme that the utility model provides, 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 further improvement of the utility model, it is tabular that described sound basin is flat thin, the sound basin comprises the sound basin ring of sound basin body and annular, combine 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 further improvement of the utility model, 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 further improvement of the utility model, 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 further improvement of the utility model, the cross section of described sound basin ring is the circular arc to lower recess.
As further improvement of the utility model, 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 utility model 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 utility model preferred embodiment.
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 utility model is described in further detail 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.In the utility model 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 in the utility model 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 201020511091 CN201758446U (en) | 2010-08-26 | 2010-08-26 | Thin loudspeaker based on multi-step magnetic conductive yoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020511091 CN201758446U (en) | 2010-08-26 | 2010-08-26 | Thin loudspeaker based on multi-step magnetic conductive yoke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201758446U true CN201758446U (en) | 2011-03-09 |
Family
ID=43645734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020511091 Expired - Lifetime CN201758446U (en) | 2010-08-26 | 2010-08-26 | Thin loudspeaker based on multi-step magnetic conductive yoke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201758446U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931847A (en) * | 2010-08-26 | 2010-12-29 | 无锡杰夫电声有限公司 | Thin type speaker based on multi-step magnetic yoke |
| CN103458327A (en) * | 2013-09-12 | 2013-12-18 | 宁波东方电子有限公司 | Combined type sound producing device |
-
2010
- 2010-08-26 CN CN 201020511091 patent/CN201758446U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931847A (en) * | 2010-08-26 | 2010-12-29 | 无锡杰夫电声有限公司 | Thin type speaker based on multi-step magnetic yoke |
| CN101931847B (en) * | 2010-08-26 | 2013-05-29 | 无锡杰夫电声有限公司 | Thin type speaker based on multi-step magnetic yoke |
| CN103458327A (en) * | 2013-09-12 | 2013-12-18 | 宁波东方电子有限公司 | Combined type sound producing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110309 Effective date of abandoning: 20130529 |
|
| RGAV | Abandon patent right to avoid regrant |