CN201252635Y - Double-frequency coaxial earphones with shared magnet - Google Patents
Double-frequency coaxial earphones with shared magnet Download PDFInfo
- Publication number
- CN201252635Y CN201252635Y CNU200820131509XU CN200820131509U CN201252635Y CN 201252635 Y CN201252635 Y CN 201252635Y CN U200820131509X U CNU200820131509X U CN U200820131509XU CN 200820131509 U CN200820131509 U CN 200820131509U CN 201252635 Y CN201252635 Y CN 201252635Y
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- China
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- frequency
- yoke
- voice coil
- outer yoke
- earphone
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
- H04R2209/026—Transducers having separately controllable opposing diaphragms, e.g. for ring-tone and voice
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- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The utility model relates to double-frequency coaxial earphones with a shared magnet. A shared annular shared magnet is arranged between a capped top plate of an outer yoke and a peripheral disc of an inner yoke, so that the outer yoke and the inner yoke have different magnetism; a low-frequency speech coil axially extends to a position between the annular inner wall of the outer yoke and the peripheral disc of the inner yoke to form a low audio-frequency part; the inner axle tube of the inner yoke concavely extends into a central hole of the outer yoke; a high-frequency speech coil axially extends to a position between the central hole of the outer yoke and the inner axle tube of the inner yoke to form a high audio-frequency part; the inner axle tube penetrates through the central hole to be used as a note leading tube, while the audio frequency of the high audio-frequency part penetrates through the inner axle tube to cause a low-frequency vibrating diaphragm of the low audio-frequency part to be enabled synchronously and the high audio-frequency part forms an in-phase synchronous audio frequency to be outputted with the low audio-frequency part. The utility model effectively solves the problem of sound distortion and is miniaturized in volume.
Description
Technical field
The utility model is about a kind of earphone, refers in particular to a kind of coaxial earphone of the double frequency with shared magnetite that is applicable to.
Background technology
Fig. 1 is the cutaway view of known earphone, and as shown in the figure, known earphone 9 comprises an earphone case 90, a signal line 91, a vibrating diaphragm 92, a permanet magnet 93, a voice coil loudspeaker voice coil 94, a magnetic conductive part 95, reaches a yoke 96.
As shown in Figure 1, signal line 91, vibrating diaphragm 92, permanet magnet 93, voice coil loudspeaker voice coil 94, magnetic conductive part 95, and yoke 96 be located in earphone case 90 inside respectively, wherein, voice coil loudspeaker voice coil 94 is mounted on the vibrating diaphragm 92 and corresponding being surrounded on outside the periphery of permanet magnet 93, but keep a radial clearance with magnetic conductive part 95, permanet magnet 93 is located between magnetic conductive part 95 and the yoke 96.
Wherein, signal line 91 electrically connects with voice coil loudspeaker voice coil 94, when audio signal is input into voice coil loudspeaker voice coil 94 by signal line 91, voice coil loudspeaker voice coil 94 can produce a magnetic field by galvanomagnetic effect, the reciprocation of magnetic force takes place in this magnetic field again with magnetic conductive part 95, and make vibrating diaphragm 92 vibrations, and then audio signal is converted to audio frequency sound output.
In known technology; general audio signal all includes high and low audio-frequency unit; so vibration on same vibrating diaphragm 92; and produce high and low audio frequency sound simultaneously; but it has the characteristic of different wave length and amplitude owing to high and low audio frequency sound; as being clearly different characteristics to be separated only, be the shortcoming that produces high and low audio frequency intermodulation distortion with known regular meeting, thereby can't make that sound is clear and represent with same vibrating diaphragm 92.If insert high and low sound loudspeaker, will make known earphone volume become big again, be not suitable for present known earphone size again with the high and low audio signal of broadcast out of the ordinary, more than frequent puzzlement dealer.
The utility model content
The purpose of this utility model is to provide a kind of coaxial earphone of double frequency with shared magnetite, the audio frequency and the bass portion of high audio portion can be formed homophase and isochronous audio output with it, effectively solves problem of dtmf distortion DTMF, has the volume miniaturization again concurrently.
For achieving the above object, the coaxial earphone of the double frequency with shared magnetite that the utility model provides comprises yoke, a bass portion in an earphone case, an outer yoke, the shared annular magnetic stone, one, reaches a high audio portion.
Wherein, establish an accommodation space in the earphone case.Outer yoke is a cap shaped, outer yoke is mounted in the accommodation space of earphone case, and outer yoke comprises a cap bizet, reaches a marginal ridge portion, and marginal ridge portion is located on the outer peripheral edges of cap bizet, the cap bizet includes a crown plate, reaches a ring inwall, and the crown plate offers a medium pore.
Therefore shared annular magnetite of the present utility model is mounted on the crown plate inner face of outer yoke, and outer yoke just has same magnetic with the outer contacting mask of shared annular magnetic stone, and sharing annular magnetite, to include a centre bore be corresponding coaxial with the medium pore of outer yoke.
Interior yoke is one flange shape (flange shape), interior yoke comprises central siphon in, an and periphery dish, the outer peripheral edges of central siphon in the periphery dish is located on, interior yoke is mounted on the opposite side of sharing on the annular magnetite and being positioned at outer yoke by the periphery dish, therefore yoke just has same magnetic with the interior contact-making surface of shared annular magnetic stone in, periphery dish external diameter is less than the ring inwall internal diameter of outer yoke, interior central siphon is less than the medium pore of outer yoke, interior central siphon protrudes into the centre bore of sharing annular magnetite, with the medium pore of outer yoke, interior central siphon central authorities wear a central perforation to use as sound guide tube.
Bass portion comprises a low frequency voice coil loudspeaker voice coil, reaches a low frequency vibrating diaphragm, wherein, the low frequency vibrating diaphragm comprises a central vibrating diaphragm, the low frequency voice coil loudspeaker voice coil be mounted on the low frequency vibrating diaphragm and the periphery dish of corresponding this ring inwall that extends axially into outer yoke and interior yoke between, the low frequency voice coil loudspeaker voice coil with the ring inwall, and the periphery dish all keep a radial clearance, low frequency vibrating diaphragm periphery is mounted in the marginal ridge portion of outer yoke.
High audio portion comprises a high frequency voice coil loudspeaker voice coil, reaches a high-frequency diaphragm, the high frequency voice coil loudspeaker voice coil be mounted on the high-frequency diaphragm and the interior central siphon of corresponding medium pore that extends axially into outer yoke and interior yoke between, high frequency voice coil loudspeaker voice coil and medium pore, and in central siphon all keep another radial clearance, the high-frequency diaphragm periphery is mounted on the cap bizet of outer yoke.
Wherein, the interior central siphon of bass portion is to be communicated between the central vibrating diaphragm of high audio portion and bass portion.
Therefore, central siphon caused the central vibrating diaphragm activation of bass portion in the audio frequency of high audio portion can pass, and form homophase and output synchronously with the audio frequency of bass portion, so high audio portion can be separated with the different audio frequency of bass portion, effectively solve the problem of high-low sound frequency intermodulation distortion, the volume that can have earphone again concurrently minimizes.
Bass portion can comprise leading note awl, the leading note awl is fixedly arranged on the periphery dish of interior yoke, leading note awl central authorities offer a voice guide hole, voice guide hole coaxial corresponding to interior central siphon central perforation and be interconnected, be evenly distributed in order to audio frequency on the surface of central vibrating diaphragm of bass portion high audio portion.
In addition, the utlity model has the coaxial earphone of double frequency of sharing magnetite and can comprise a circuit board, circuit board comprises a frequency dividing circuit, and frequency dividing circuit is in order to the audio mixing input signal be separated into high frequency output signal and low frequency output signal, use so that high frequency voice coil loudspeaker voice coil and low frequency voice coil loudspeaker voice coil to be provided respectively.
Outer yoke can comprise a plurality of pores, and a plurality of pores are the peripheries that are opened in marginal ridge portion, so that extraneous air enters in outer yoke, bass portion, reaches in the formed enclosure space of high audio portion, so that the inside and outside isostasy in space.
The low frequency vibrating diaphragm can comprise scrobicular ring in, reach an outer scrobicular ring, and the low frequency voice coil loudspeaker voice coil is mounted on scrobicular ring place in this, and this outer scrobicular ring is mounted in this marginal ridge portion of this outer yoke.
Moreover high-frequency diaphragm can comprise scrobicular ring in, reach an outer scrobicular ring, and the high frequency voice coil loudspeaker voice coil is mounted on interior scrobicular ring place, and outer scrobicular ring is mounted on the cap bizet of outer yoke.
Bass portion can comprise a retainer ring, and high audio portion can comprise another retainer ring, and retainer ring is mounted in the marginal ridge portion of outer yoke, in order to fixing low frequency vibrating diaphragm.Another retainer ring is mounted on the cap bizet of outer yoke, in order to fixing high-frequency diaphragm.
The earphone case of the coaxial earphone of the utility model double frequency can also comprise an earplug, or sets up an earmuff, or cooperates the different earphone utilization of big or small form of all kinds.Earphone case of the present utility model can by a pedestal, and a protecgulum cover fixedly relatively and form, also can change and all can by integrally formed making.
By said structure, central siphon made the synchronous activation of low frequency vibrating diaphragm of bass portion in the utility model really can pass the audio frequency of high audio portion, and formed homophase and isochronous audio output with bass portion, solved problem of dtmf distortion DTMF effectively, had the volume miniaturization again concurrently.
Description of drawings
Fig. 1 is the cutaway view of known earphone.
Fig. 2 is the stereogram of the utility model first preferred embodiment.
Fig. 3 is the exploded view of the utility model first preferred embodiment.
Fig. 4 is the cutaway view of the utility model first preferred embodiment.
Fig. 5 is the cutaway view of the utility model second preferred embodiment.
Fig. 6 is the stereogram of the utility model the 3rd preferred embodiment.
Fig. 7 is the cutaway view of the utility model the 3rd preferred embodiment.
Primary clustering symbol description in the accompanying drawing
Contact-making surface 212 in the centre bore 210 outer contacting faces 211
Interior central siphon 221 periphery dish 222 low frequency voice coil loudspeaker voice coils 23
Outer scrobicular ring 244 leading notes are bored 25 voice guide holes 251
Earphone case 90 signal line 91 vibrating diaphragms 92
Yoke 96
Embodiment
See also Fig. 2, reach Fig. 3, Fig. 2 is the stereogram of the utility model first preferred embodiment, and Fig. 3 is the exploded view of the utility model first preferred embodiment.Present embodiment is a kind of coaxial earphone of double frequency with shared magnetite as shown in the figure, comprises an earphone case 5, one outer yoke 1, a bass portion 2, one shared annular magnetic stone 21, one interior yoke 22, a high audio portion 3, reaches a circuit board 4.
As shown in Figure 2, earphone case 5 comprises a pedestal 51, reaches a protecgulum 52, establishes an accommodation space 50 in the pedestal 51.As shown in Figure 3, circuit board 4 comprises a frequency dividing circuit 41, and wherein, frequency dividing circuit 41 is in order to the audio mixing input signal be separated into high frequency output signal and low frequency output signal, use so that high frequency voice coil loudspeaker voice coil 31 and low frequency voice coil loudspeaker voice coil 23 to be provided respectively.
As Fig. 2, and shown in Figure 3, outer yoke 1, bass portion 2, and high audio portion 3 be located in jointly in the earphone case 5, signal line 6 is electrically connected at frequency dividing circuit 41, to provide frequency dividing circuit 41 audio mixing input signals.
Please consult Fig. 2, Fig. 3 simultaneously, reach Fig. 4, Fig. 4 is the cutaway view of the utility model first preferred embodiment, as shown in the figure, outer yoke 1 is a cap shaped, outer yoke 1 is mounted in the accommodation space 50 of earphone case 5, outer yoke 1 comprises a cap bizet 11, reaches a marginal ridge portion 12, marginal ridge portion 12 is located on the outer peripheral edges of cap bizet 11, outer yoke 1 is mounted on earphone case 5 inside by the outer peripheral edges of marginal ridge portion 12 exactly, cap bizet 11 includes a crown plate 110, reaches a ring inwall 112, and crown plate 110 offers a medium pore 111.
In addition, outer yoke 1 also comprises a plurality of pores 113, and it is opened in the periphery of marginal ridge portion 12, extraneous air can be directed in outer yoke 1, bass portion 2, reach in the high audio portion 3 formed enclosure spaces, so that the inside and outside isostasy in space by pore 113.
Fig. 4 shows, the outer contacting face 211 of sharing annular magnetite 21 connects airtight and sticks together crown plate 110 inner faces that are mounted on outer yoke 1, so outer yoke 1 just connects airtight with the outer contacting face 211 of shared annular magnetic stone 21 and has a same magnetic, the S utmost point for example shown in Figure 4 in this example.It is corresponding coaxial with the medium pore 111 of outer yoke 1 that shared annular magnetite 21 includes a centre bore 210.
As Fig. 3, and it is shown in Figure 4, it is one flange shape that interior yoke 22 is, interior yoke 22 comprises central siphon 221 in, an and periphery dish 222, the outer peripheral edges of central siphon 221 in periphery dish 222 is located on, the periphery dish 222 of interior yoke 22 connected airtight to stick together to be mounted on share annular magnetite 21 and be positioned on the contact-making surface 212 of outer yoke 1 opposite side, that is shared annular magnetite 21 is periphery dish 222 that axial clamp is located at interior yoke 22, and between the crown plate 110 of outer yoke 1, therefore should in yoke 22 just connect airtight and have a same magnetic with this interior contact-making surface 212 of sharing annular magnetite 21, for example at the N utmost point shown in this illustration 4, know easily that so show the two just has different magnetic outer yoke 1 and interior yoke 22.
Periphery dish 222 external diameters are less than ring inwall 112 internal diameters of outer yoke 1, interior central siphon 221 external diameters are less than medium pore 111 internal diameters of outer yoke 1, interior central siphon 221 protrude into the centre bore 210 of sharing annular magnetite 21, with the medium pore 111 of outer yoke 1, interior central siphon 221 central authorities wear a central perforation 220 to use as sound guide tube.
As Fig. 3, Fig. 4, low frequency vibrating diaphragm 24 comprises scrobicular ring 243 in, reaches an outer scrobicular ring 244, and low frequency voice coil loudspeaker voice coil 23 is mounted on interior scrobicular ring 243 places, and outer scrobicular ring 244 is mounted in the marginal ridge portion 12 of outer yoke 1.
Low frequency vibrating diaphragm 24 peripheries are mounted in the marginal ridge portion 12 of outer yoke 1, and retainer ring 26 is mounted in the marginal ridge portion 12 of outer yoke 1, in order to fixing low frequency vibrating diaphragm 24.
Leading note awl 25 is fixedly arranged on the periphery dish 222 of interior yoke 22, leading note is bored 25 central authorities and is offered a voice guide hole 251, voice guide hole 251 coaxial corresponding to interior central siphon 221 central perforation 220 and be interconnected, be evenly distributed in order to audio frequency on the surface of central vibrating diaphragm 241 of bass portion 2 high audio portion 3.
In this example, outer yoke 1 is as the S utmost point magnetic pole of sharing annular magnetite 21, interior yoke 22 is as the N utmost point magnetic pole of sharing annular magnetite 21, when the audio bass signal inputs to low frequency voice coil loudspeaker voice coil 23, the magnetic field that it produced can and the ring inwall 112 of outer yoke 1, and in the S-N pole field of 222 in periphery dish of yoke 22 produce the reciprocation of magnetic force, send sound wave by low frequency vibrating diaphragm 24 with vibrations again.
As Fig. 3, Fig. 4, high-frequency diaphragm 32 comprises scrobicular ring 321 in, reaches an outer scrobicular ring 322, and high frequency voice coil loudspeaker voice coil 31 is mounted on interior scrobicular ring 321 places, and outer scrobicular ring 322 is mounted on the cap bizet 11 of outer yoke 1.High audio portion 3 also comprises another retainer ring 33, and another retainer ring 33 is mounted on the cap bizet 11 of outer yoke 1, in order to fixing high-frequency diaphragm 32.
In this example, when the high pitch audio signal inputs to high frequency voice coil loudspeaker voice coil 31, the magnetic field that it produced can and the crown plate 110 of outer yoke 1, and in the S-N pole field of 221 of interior central siphons of yoke 22 produce the reciprocation of magnetic force, send sound wave by high-frequency diaphragm 32 with vibrations again.
As shown in Figure 4, because the interior central siphon 221 of bass portion 2 is to be communicated between the central vibrating diaphragm 241 of high audio portion 3 and bass portion 2; Therefore, central siphon 221 caused central vibrating diaphragm 241 (the being shown in Fig. 3) activation of bass portion 2 in the high pitch audio frequency of high audio portion 3 can pass, and formed homophase and output synchronously with the audio frequency of bass portion 2.
Owing to the utlity model has high audio portion 3 and bass portion 2, therefore can with high audio, and the sound wave of bass separated, can effectively solve the problem of high-low sound frequency intermodulation distortion, by the structural design of coaxial earphone of the present utility model, the volume that can have earphone concurrently minimizes again.
Seeing also Fig. 5, is the cutaway view of the utility model two preferred embodiments.As shown in the figure, the structure of itself and a last embodiment is roughly the same, and only different to be in earphone case 7 are the housings 7 that belong to a PlayGear Stealth, so comprise an earplug 71, earplug 71 is radially to be extended by earphone case 7.
See also Fig. 6 and Fig. 7, Fig. 6 is the stereogram of the utility model the 3rd preferred embodiment, and Fig. 7 is the cutaway view of the utility model the 3rd preferred embodiment.As shown in the figure, roughly the same in the structure of present embodiment itself and first embodiment, difference is that earphone case 8 is the housings 8 that belong to an all cover earphone, so comprise an earmuff 81, earmuff 81 is to be extended vertically by earphone case 8.
The foregoing description is only given an example for convenience of description, and the interest field that the utility model is advocated is from should but not only limiting to the foregoing description with described being as the criterion of claim scope of application.
Claims (10)
1, a kind of coaxial earphone of double frequency with shared magnetite is characterized in that, comprising:
One earphone case, in establish an accommodation space;
One outer yoke, be a cap shaped, should be mounted in this accommodation space of this earphone case by outer yoke, should comprise a cap bizet, reach a marginal ridge portion by outer yoke, this marginal ridge portion is located on the outer peripheral edges of this cap bizet, this cap bizet includes a crown plate, reaches a ring inwall, and this crown plate offers a medium pore;
One shares annular magnetic stone, is mounted on this crown plate inner face of this outer yoke, and it is corresponding coaxial with the medium pore that is somebody's turn to do outer yoke that this shared annular magnetite includes a centre bore;
Yoke in one, be one flange shape, should comprise central siphon in, reach a periphery dish by interior yoke, this periphery dish is located on the outer peripheral edges of central siphon in this, to be somebody's turn to do interior yoke by this periphery dish and be mounted on the opposite side that this is shared on annular magnetite and is positioned at this outer yoke, this periphery dish is less than this ring inwall of this outer yoke, central siphon is less than this medium pore of this outer yoke in being somebody's turn to do, should in central siphon protrude into this this centre bore of sharing annular magnetite, with this medium pore that should outer yoke, these interior central siphon central authorities wear a central perforation;
One bass portion, comprise a low frequency voice coil loudspeaker voice coil, reach a low frequency vibrating diaphragm, this low frequency voice coil loudspeaker voice coil be mounted on this low frequency vibrating diaphragm and this periphery dish of corresponding this ring inwall that extends axially into this outer yoke and this interior yoke between, this low frequency voice coil loudspeaker voice coil and this ring inwall, and this periphery dish all keep a radial clearance, this low frequency vibrating diaphragm periphery is mounted in this marginal ridge portion of this outer yoke; And
-high audio portion, comprise a high frequency voice coil loudspeaker voice coil, reach a high-frequency diaphragm, this high frequency voice coil loudspeaker voice coil be mounted on this high-frequency diaphragm and corresponding this medium pore that extends axially into this outer yoke with should in being somebody's turn to do between the interior central siphon of yoke, this high frequency voice coil loudspeaker voice coil and this medium pore, and should in central siphon all keep another radial clearance, this high-frequency diaphragm periphery is mounted on this cap bizet of this outer yoke.
2, the coaxial earphone of double frequency as claimed in claim 1, it is characterized in that, wherein this bass portion comprises-the leading note awl, this leading note awl is fixedly arranged on this periphery dish of yoke in this, this leading note awl central authorities offer-voice guide hole, this voice guide hole coaxial corresponding to central siphon in this this central perforation and be interconnected.
3, the coaxial earphone of double frequency as claimed in claim 1 is characterized in that, comprises a circuit board, and this circuit board comprises a frequency dividing circuit.
4, the coaxial earphone of double frequency as claimed in claim 1 is characterized in that, wherein should comprise a plurality of pores by outer yoke, and these a plurality of pores are opened in the periphery of this marginal ridge portion.
5, the coaxial earphone of double frequency as claimed in claim 1 is characterized in that, wherein this low frequency vibrating diaphragm comprises scrobicular ring in, reaches an outer scrobicular ring, and this low frequency voice coil loudspeaker voice coil is mounted on scrobicular ring place in this, and this outer scrobicular ring is mounted in this marginal ridge portion of this outer yoke.
6, the coaxial earphone of double frequency as claimed in claim 1 is characterized in that, wherein this high-frequency diaphragm comprises scrobicular ring in, reaches an outer scrobicular ring, and this high frequency voice coil loudspeaker voice coil is mounted on scrobicular ring place in this, and this outer scrobicular ring is mounted on this cap bizet of this outer yoke.
7, the coaxial earphone of double frequency as claimed in claim 1, it is characterized in that wherein this bass portion comprises a retainer ring, this high audio portion comprises another retainer ring, this retainer ring is mounted in this marginal ridge portion of this outer yoke, and this another retainer ring is mounted on this cap bizet of this outer yoke.
8, the coaxial earphone of double frequency as claimed in claim 1 is characterized in that, wherein this earphone case comprises an earplug, and this earplug is radially to be extended by this earphone case.
9, the coaxial earphone of double frequency as claimed in claim 1 is characterized in that, wherein this earphone case comprises an earmuff, and this earmuff is to be extended vertically by this earphone case.
10, the coaxial earphone of double frequency as claimed in claim 1 is characterized in that, wherein this earphone case comprises a pedestal and a protecgulum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820131509XU CN201252635Y (en) | 2008-08-27 | 2008-08-27 | Double-frequency coaxial earphones with shared magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820131509XU CN201252635Y (en) | 2008-08-27 | 2008-08-27 | Double-frequency coaxial earphones with shared magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201252635Y true CN201252635Y (en) | 2009-06-03 |
Family
ID=40748296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820131509XU Expired - Lifetime CN201252635Y (en) | 2008-08-27 | 2008-08-27 | Double-frequency coaxial earphones with shared magnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201252635Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010007440A2 (en) * | 2008-07-17 | 2010-01-21 | Strong Pacific (Hong Kong) Limited | Earphone |
| CN103763666A (en) * | 2014-01-04 | 2014-04-30 | 海菲曼（天津）科技有限公司 | Frequency division type panel earphone |
| CN106162460A (en) * | 2016-07-25 | 2016-11-23 | 东莞市科音声学科技有限公司 | A kind of bicyclic Loudspeaker diaphragm and the loudspeaker with this bicyclic Loudspeaker diaphragm |
| GB2578375A (en) * | 2018-09-28 | 2020-05-06 | Tymphany Acoustic Tech Huizhou Co Ltd | Single-magnet double-tone-circuit coaxial loudspeaker |
-
2008
- 2008-08-27 CN CNU200820131509XU patent/CN201252635Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010007440A2 (en) * | 2008-07-17 | 2010-01-21 | Strong Pacific (Hong Kong) Limited | Earphone |
| WO2010007440A3 (en) * | 2008-07-17 | 2010-05-06 | Strong Pacific (Hong Kong) Limited | Earphone comprising a compound driver a mixing chamber and a duct |
| CN103763666A (en) * | 2014-01-04 | 2014-04-30 | 海菲曼（天津）科技有限公司 | Frequency division type panel earphone |
| CN106162460A (en) * | 2016-07-25 | 2016-11-23 | 东莞市科音声学科技有限公司 | A kind of bicyclic Loudspeaker diaphragm and the loudspeaker with this bicyclic Loudspeaker diaphragm |
| GB2578375A (en) * | 2018-09-28 | 2020-05-06 | Tymphany Acoustic Tech Huizhou Co Ltd | Single-magnet double-tone-circuit coaxial loudspeaker |
| GB2578375B (en) * | 2018-09-28 | 2021-04-07 | Tymphany Acoustic Tech Huizhou Co Ltd | Single-magnet double-tone-circuit coaxial loudspeaker |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090603 |
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| CX01 | Expiry of patent term |