CN205545800U - Bass frequency division earphone - Google Patents
Bass frequency division earphone Download PDFInfo
- Publication number
- CN205545800U CN205545800U CN201620119496.9U CN201620119496U CN205545800U CN 205545800 U CN205545800 U CN 205545800U CN 201620119496 U CN201620119496 U CN 201620119496U CN 205545800 U CN205545800 U CN 205545800U
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- aforementioned
- vent
- earphone
- auxiliary air
- voice coil
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Abstract
The utility model discloses a bass frequency division earphone, including earphone shell and vocal monomer, the earphone shell has the holding chamber, and holding intracavity rear end is formed with annular diaphragm, inside first back cavity, the formation second back cavity between annular diaphragm outside and the earphone shell internal face of forming of annular diaphragm, the sound production monomer includes body and loudspeaker subassembly, the body has base plate portion and first annular portion, sets up the through -hole that link up base plate portion both sides and ante -chamber along the front and back in the base plate portion, also seted up a supplementary bleeder vent in the base plate portion, a supplementary bleeder vent is located and other just correspondence of through -hole side is located the voice coil loudspeaker voice coil outside, sets up the 2nd supplementary bleeder vent that link up with the external world in the annular portion, and just to lining up a back cavity, the 2nd supplementary bleeder vent link up the 2nd back cavity to the through -hole, and the annular diaphragm separation is between a supplementary bleeder vent, the 2nd supplementary bleeder vent, by this, get into the second back cavity with most bass through the supplementary bleeder vent of second, its frequency division is effectual, promotes the audio quality of earphone ingeniously.
Description
Technical field
This utility model relates to earphone art, refers in particular to a kind of bass frequency dividing earphone.
Background technology
At present, the sounding monomer that earphone generally comprises earphone outer covering, is installed in earphone outer covering, its sounding monomer includes body and the horn assembly being assembled on body, is formed with ante-chamber in earphone outer covering on front side of corresponding sounding monomer, is formed with back cavity in earphone outer covering on rear side of corresponding sounding monomer；Its body typically has the baseplate part and ring part being connected to each other, and aforementioned ante-chamber is enclosed by baseplate part and ring part and forms, and this baseplate part offers along the most through ante-chamber and the through hole of back cavity；This horn assembly includes yoke, Magnet, washer, voice coil loudspeaker voice coil and diaphragm, this yoke, Magnet, washer and the installing of voice coil loudspeaker voice coil correspondence aforementioned through-hole；Be equivalent to the low frequency signal of sounding monomer, intermediate-freuqncy signal, high-frequency signal (can also be low frequency signal, high frequency signal etc., the most simply enumerate, not it is construed as limiting) all it is mixed in back cavity, it divides less effective, especially, bass signal fails clearly to be divided out, have impact on the bass effect of earphone, cause the integral sound effect insufficient quality of earphone, it is difficult to meet the requirement that people are the highest to earphone audio quality.
Accordingly, it would be desirable to work out a kind of new technical scheme to solve the problems referred to above.
Utility model content
In view of this, this utility model is for the disappearance of prior art existence, and its main purpose is to provide a kind of bass frequency dividing earphone, and major part bass is entered the second back cavity through the second auxiliary air-vent by dexterously, and its frequency dividing is effective, promotes the audio quality of earphone.
For achieving the above object, this utility model uses such as purgation technical scheme:
A kind of bass frequency dividing earphone, the sounding monomer include earphone outer covering, being installed in earphone outer covering；
Wherein, this earphone outer covering has containing cavity, and this containing cavity is formed with front opening in the front end of earphone outer covering, and in this containing cavity, rear end is formed with toroidal membrane, around being formed with the first back cavity inside this toroidal membrane, between this toroidal membrane outside and earphone outer covering internal face, form the second back cavity；
This sounding monomer includes body and the horn assembly being assembled on body；
This body has the baseplate part being connected to each other and first annular portion, this baseplate part and first annular portion and encloses formation ante-chamber, this baseplate part offers along front and back both sides, through substrate portion and the through hole of ante-chamber；This horn assembly includes yoke, Magnet, washer, circular resistance sound paper, voice coil loudspeaker voice coil and diaphragm, and this yoke, Magnet, washer and the installing of voice coil loudspeaker voice coil correspondence aforementioned through-hole, this diaphragm is connected on voice coil loudspeaker voice coil and diaphragm is positioned at ante-chamber；
More than one first auxiliary air-vent it is further opened with in aforesaid base plate portion, this the first auxiliary air-vent is positioned at side, aforementioned through-hole side and correspondence is positioned at outside voice coil loudspeaker voice coil, and, offer more than one second auxiliary air-vent through with the external world in described first annular portion, at this first auxiliary air-vent, the second auxiliary air-vent, be all covered with resistance sound paper；
This sounding monomer is installed in aforementioned containing cavity, aforementioned body is connected on toroidal membrane, aforementioned through-hole is just to the first back cavity within through toroidal membrane, this the second auxiliary through aforementioned second back cavity of air-vent, this toroidal membrane intercepts and assists between air-vent, the second auxiliary air-vent in aforementioned first；And, this outer body, toroidal membrane and earphone outer casing inner wall face are enclosed and are configured to divide chamber, and this frequency dividing chamber is formed with the 3rd auxiliary air-vent at the front opening of earphone outer covering.
As a kind of preferred version, described 3rd auxiliary air-vent front is equiped with ring baffle, and this ring baffle offers more than one through aforementioned 3rd auxiliary air-vent and the 4th auxiliary air-vent in frequency dividing chamber, and the 4th auxiliary air-vent is also covered with resistance sound paper；The front end of aforementioned headset shell is covered with earmuff, and this earmuff is connected to ring baffle.
As a kind of preferred version, described ring baffle is locked in aforementioned headset case nose, and aforementioned sounding monomer is compressed to be limited between ring baffle and toroidal membrane；The outer concave of described ring baffle is provided with catching groove, and aforementioned earmuff rear end is formed with elastic engaging portion, and this elasticity engaging portion stretches in catching groove.
As a kind of preferred version, described baseplate part front and rear end is convexly equipped with the second ring part, the 3rd ring part respectively, aforementioned through-hole along the most through second ring part, the inside of the 3rd ring part, aforementioned first auxiliary air-vent along outside the most through second ring part, the inside of the 3rd ring part；3rd ring part stretches in aforementioned toroidal dividing plate, below this baseplate part in corresponding 3rd ring part, have additional sound insulation cylinder, this sound insulation cylinder has barrel and is integrally connected to the internal ring stopper of barrel lower end, offering the remittance sound hole just to aforementioned through-hole in this internal ring stopper, this barrel extends beyond aforementioned toroidal dividing plate rear end backward.
As a kind of preferred version, described first back cavity through aforementioned headset outer casing back, being formed with tail end opening in earphone outer covering rear end, this tail end opening part is covered with tail end cover.
As a kind of preferred version, described first annular portion front group, equipped with upper cover, this covers and offers some senders, and aforementioned horn assembly is capped and covers in inside.
As a kind of preferred version, being connected and have some ribs between described second ring part and baseplate part, aforementioned first auxiliary air-vent is between adjacent ribs.
As a kind of preferred version, being designed as the biggest formula cone mesa structure after going between described second ring part lateral surface and baseplate part front end face, aforementioned first auxiliary air-vent is opened at this frustum face.
As a kind of preferred version, lateral surface corresponding each second auxiliary air-vent in described first annular portion is arranged with annular slot to make way, aforementioned second auxiliary resistance sound paper corresponding to air-vent is designed as monoblock type arc resistance sound paper, and this monoblock type arc resistance sound paper is heavy to be located in annular slot to make way.
As a kind of preferred version, described first auxiliary resistance sound paper corresponding to air-vent is designed as integral annular resistance sound paper, and this integral annular resistance sound paper together covers on all first auxiliary air-vents.
This utility model compared with prior art has clear advantage and beneficial effect, specifically, as shown from the above technical solution, it is mainly by setting up first on the body of sounding monomer, second auxiliary air-vent, and to arranging toroidal membrane in earphone outer covering, the back cavity of conventional art is separated to form the first back cavity by its toroidal membrane, second back cavity, so, major part bass is entered the second back cavity through the second auxiliary air-vent, its major part bass signal can clearly be divided out, divide effective, improve bass effect and the audio quality of overall earphone of earphone, efficiently solve conventional art medium and low frequency signal, intermediate-freuqncy signal, high-frequency signals etc. are all mixed in back cavity, cause the problem that the bass effect of earphone is poor, the earphone of this utility model more meets people and focuses on the demand of earphone bass effect.
For more clearly illustrating architectural feature of the present utility model and effect, with specific embodiment, this utility model is described in detail below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is the assembling perspective representation of the embodiment of this utility model；
Fig. 2 is that another angle of the embodiment of this utility model assembles perspective representation；
Fig. 3 is the exploded view of the embodiment of this utility model；
Fig. 4 is the sectional view (earmuff is exploded from one another with earphone) of the embodiment of this utility model；
Fig. 5 is the decomposition texture diagram of earphone outer covering and tail end cover；
Fig. 6 is the stereochemical structure diagram of earphone outer covering；
Fig. 7 be this utility model embodiment in the assembling perspective representation of sounding monomer；
Fig. 8 be this utility model embodiment in sounding monomer another angle assemble perspective representation；
Fig. 9 be this utility model embodiment in the exploded view of sounding monomer；
Figure 10 be this utility model embodiment in the sectional view of sounding monomer；
Figure 11 be this utility model embodiment in the perspective representation of body；
Figure 12 be this utility model embodiment in the front view of body；
Figure 13 be this utility model embodiment in the rearview of body；
Figure 14 be this utility model embodiment in the stereo dissected figure of body.
Accompanying drawing identifier declaration:
1, sounding monomer
10, body 11, baseplate part
12, first annular portion the 13, second ring part
14, the 3rd ring part 15, through hole
16, the first auxiliary air-vent 17, second assists air-vent
18, ribs 19, annular slot to make way
1101, groove 1102, PCB substrate are installed
20, upper cover 30, yoke
40, Magnet 50, washer
60, circular resistance sound paper 70, voice coil loudspeaker voice coil
80, diaphragm 91, arc resistance sound paper
92, annular resistance sound paper
100, earphone outer covering 101, containing cavity
102, toroidal membrane the 103, first back cavity
104, the second back cavity the 105, the 3rd assists air-vent
106, ring baffle the 107, the 4th assists air-vent
108, catching groove 109, elastic engaging portion
110, sound insulation cylinder 111, barrel
112, internal ring stopper 113, the sound hole that converges
114, tail end opening 115, tail end cover
116, earmuff.
Detailed description of the invention
Refer to shown in Fig. 1 to Figure 14, that show the concrete structure of the embodiment of this utility model, its sounding monomer (1) including earphone outer covering (100), being installed in earphone outer covering (100).
Wherein, this earphone outer covering (100) has containing cavity (101), this containing cavity (101) is formed with front opening in the front end of earphone outer covering (100), this containing cavity (101) interior rear end is formed with toroidal membrane (102), this toroidal membrane (102) is internal around being formed with the first back cavity (103), forms the second back cavity (104) between this toroidal membrane (102) outside and earphone outer covering (100) internal face；In the present embodiment, described first back cavity (103) through aforementioned headset shell (100) rear end, it is formed with tail end opening (114) in earphone outer covering (100) rear end, this tail end opening (114) place is covered with tail end cover (115).
This sounding monomer (1) includes body (10) and the horn assembly being assembled on body (10).
This body (10) has the baseplate part (11) and first annular portion (12) being connected to each other；Baseplate part (11) rear end face of this body 10 is concavely provided with installation groove (1101), is provided with PCB substrate (1102) in this installation groove (1101)；This baseplate part (11) and first annular portion (12) enclose formation ante-chamber, and this baseplate part (11) offers the through hole (15) along front and back (11) both sides, through substrate portion and ante-chamber；This horn assembly includes yoke (30), Magnet (40), washer (50), circular resistance sound paper (60), voice coil loudspeaker voice coil (70) and diaphragm (80), corresponding aforementioned through-hole (15) installing of this yoke (30), Magnet (40), washer (50) and voice coil loudspeaker voice coil (70), this diaphragm (80) is connected to voice coil loudspeaker voice coil (70), and above and diaphragm (80) is positioned at ante-chamber；Described first annular portion (12) front group, equipped with upper cover (20), this upper cover (20) offers some senders, and aforementioned horn assembly is capped (20) and covers in inside.
More than one first auxiliary air-vent (16) it is further opened with in aforesaid base plate portion (11), this first auxiliary air-vent (16) is positioned at side, aforementioned through-hole (15) side and correspondence is positioned at voice coil loudspeaker voice coil (70) outside, and, offering more than one second auxiliary air-vent (17) through with the external world on described first annular portion (12), this first auxiliary air-vent (16), the second auxiliary air-vent (17) place are all covered with resistance sound paper；In the present embodiment, corresponding each second auxiliary air-vent (17) of described first annular portion (12) lateral surface is arranged with annular slot to make way (19), resistance sound paper corresponding to aforementioned second auxiliary air-vent (17) is designed as monoblock type arc resistance sound paper (91), and this monoblock type arc resistance sound paper (91) is heavy to be located in annular slot to make way (19)；Resistance sound paper corresponding to described first auxiliary air-vent (16) is designed as integral annular resistance sound paper (92), and this integral annular resistance sound paper (92) together covers on all first auxiliary air-vent (16).
This sounding monomer (1) is installed in aforementioned containing cavity (101), aforementioned body (10) is connected on toroidal membrane (102), the first back cavity (103) that aforementioned through-hole (15) is just internal to through toroidal membrane (102), this the second auxiliary air-vent (17) through aforementioned second back cavity (104), this toroidal membrane (102) intercepts and assists between air-vent (16), the second auxiliary air-vent (17) in aforementioned first；And, this body (10) outside, toroidal membrane (102) and earphone outer covering (100) internal face enclose and are configured to divide chamber, and this frequency dividing chamber is formed with the 3rd auxiliary air-vent (105) at the front opening of earphone outer covering (100).
3rd auxiliary air-vent (105) front is equiped with ring baffle (106), offering more than one through aforementioned 3rd auxiliary air-vent (105) and the 4th auxiliary air-vent (107) in frequency dividing chamber on this ring baffle (106), the 4th auxiliary air-vent (107) is also covered with resistance sound paper；The front end of aforementioned headset shell (100) is covered with earmuff (116), and this earmuff (116) is connected to ring baffle (106)；Herein, described ring baffle (106) is locked in aforementioned headset shell (100) front end, and aforementioned sounding monomer (1) is compressed to be limited between ring baffle (106) and toroidal membrane (102)；The outer concave of described ring baffle (106) is provided with catching groove (108), and aforementioned earmuff (116) rear end is formed with elastic engaging portion (109), and this elasticity engaging portion (109) stretches in catching groove (108).
This baseplate part (11) front and rear end is convexly equipped with the second ring part (13), the 3rd ring part (14) respectively, aforementioned through-hole (15) is along the most through second ring part (13), the inside of the 3rd ring part (14), and aforementioned first auxiliary air-vent (16) is outside along the most through second ring part (13), the inside of the 3rd ring part (14)；In the present embodiment, it is connected between described second ring part (13) and baseplate part (11) and has some ribs (18), aforementioned first auxiliary air-vent (16) is positioned between adjacent ribs (18), the present embodiment is aforementioned first auxiliary air-vent (16), the second auxiliary air-vent (17) are designed in the way of annular is uniform, certainly, the arrangement of each air-vent is not defined by it, it is possible to be designed as other form；Herein, being designed as the biggest formula cone mesa structure after going between described second ring part (13) lateral surface and baseplate part (11) front end face, aforementioned first auxiliary air-vent (16) is opened at frustum face；3rd ring part (14) stretches in aforementioned toroidal dividing plate (102), in corresponding 3rd ring part (14) in this baseplate part (11) lower section, have additional sound insulation cylinder (110), this sound insulation cylinder (110) has barrel (111) and is integrally connected to the internal ring stopper (112) of barrel (111) lower end, offering the remittance sound hole (113) just to aforementioned through-hole (15) in this internal ring stopper (112), this barrel (111) extends beyond aforementioned toroidal dividing plate (102) rear end backward.
In sum, this utility model is mainly by setting up first on the body of sounding monomer, second auxiliary air-vent, and to arranging toroidal membrane in earphone outer covering, the back cavity of conventional art is separated to form the first back cavity by its toroidal membrane, second back cavity, so, major part bass is entered the second back cavity through the second auxiliary air-vent, its major part bass signal can clearly be divided out, divide effective, improve bass effect and the audio quality of overall earphone of earphone, efficiently solve conventional art medium and low frequency signal, intermediate-freuqncy signal, high-frequency signals etc. are all mixed in back cavity, cause the problem that the bass effect of earphone is poor, the earphone of this utility model more meets people and focuses on the demand of earphone bass effect.
The above, it it is only preferred embodiment of the present utility model, not technical scope of the present utility model is imposed any restrictions, therefore every any trickle amendment, equivalent variations and modification above example made according to technical spirit of the present utility model, all still fall within the range of technical solutions of the utility model.
Claims (10)
1. a bass frequency dividing earphone, it is characterised in that: the sounding monomer (1) include earphone outer covering (100), being installed in earphone outer covering (100)；
Wherein, this earphone outer covering (100) has containing cavity (101), this containing cavity (101) is formed with front opening in the front end of earphone outer covering (100), this containing cavity (101) interior rear end is formed with toroidal membrane (102), this toroidal membrane (102) is internal around being formed with the first back cavity (103), forms the second back cavity (104) between this toroidal membrane (102) outside and earphone outer covering (100) internal face；
This sounding monomer (1) includes body (10) and the horn assembly being assembled on body (10)；
This body (10) has the baseplate part (11) and first annular portion (12) being connected to each other, this baseplate part (11) and first annular portion (12) enclose formation ante-chamber, and this baseplate part (11) offers the through hole (15) along front and back (11) both sides, through substrate portion and ante-chamber；This horn assembly includes yoke (30), Magnet (40), washer (50), circular resistance sound paper (60), voice coil loudspeaker voice coil (70) and diaphragm (80), corresponding aforementioned through-hole (15) installing of this yoke (30), Magnet (40), washer (50) and voice coil loudspeaker voice coil (70), this diaphragm (80) is connected to voice coil loudspeaker voice coil (70), and above and diaphragm (80) is positioned at ante-chamber；
More than one first auxiliary air-vent (16) it is further opened with in aforesaid base plate portion (11), this first auxiliary air-vent (16) is positioned at side, aforementioned through-hole (15) side and correspondence is positioned at voice coil loudspeaker voice coil (70) outside, and, offering more than one second auxiliary air-vent (17) through with the external world on described first annular portion (12), this first auxiliary air-vent (16), the second auxiliary air-vent (17) place are all covered with resistance sound paper；
This sounding monomer (1) is installed in aforementioned containing cavity (101), aforementioned body (10) is connected on toroidal membrane (102), the first back cavity (103) that aforementioned through-hole (15) is just internal to through toroidal membrane (102), this the second auxiliary air-vent (17) through aforementioned second back cavity (104), this toroidal membrane (102) intercepts and assists between air-vent (16), the second auxiliary air-vent (17) in aforementioned first；And, this body (10) outside, toroidal membrane (102) and earphone outer covering (100) internal face enclose and are configured to divide chamber, and this frequency dividing chamber is formed with the 3rd auxiliary air-vent (105) at the front opening of earphone outer covering (100).
A kind of bass frequency dividing earphone the most according to claim 1, it is characterized in that: described 3rd auxiliary air-vent (105) front is equiped with ring baffle (106), offering more than one through aforementioned 3rd auxiliary air-vent (105) and the 4th auxiliary air-vent (107) in frequency dividing chamber on this ring baffle (106), the 4th auxiliary air-vent (107) is also covered with resistance sound paper；The front end of aforementioned headset shell (100) is covered with earmuff (116), and this earmuff (116) is connected to ring baffle (106).
A kind of bass frequency dividing earphone the most according to claim 2, it is characterized in that: described ring baffle (106) is locked in aforementioned headset shell (100) front end, aforementioned sounding monomer (1) is compressed to be limited between ring baffle (106) and toroidal membrane (102)；The outer concave of described ring baffle (106) is provided with catching groove (108), and aforementioned earmuff (116) rear end is formed with elastic engaging portion (109), and this elasticity engaging portion (109) stretches in catching groove (108).
A kind of bass frequency dividing earphone the most according to claim 1, it is characterized in that: described baseplate part (11) front and rear end is convexly equipped with the second ring part (13), the 3rd ring part (14) respectively, aforementioned through-hole (15) is along the most through second ring part (13), the inside of the 3rd ring part (14), and aforementioned first auxiliary air-vent (16) is outside along the most through second ring part (13), the inside of the 3rd ring part (14)；3rd ring part (14) stretches in aforementioned toroidal dividing plate (102), in corresponding 3rd ring part (14) in this baseplate part (11) lower section, have additional sound insulation cylinder (110), this sound insulation cylinder (110) has barrel (111) and is integrally connected to the internal ring stopper (112) of barrel (111) lower end, offering the remittance sound hole (113) just to aforementioned through-hole (15) in this internal ring stopper (112), this barrel (111) extends beyond aforementioned toroidal dividing plate (102) rear end backward.
A kind of bass frequency dividing earphone the most according to claim 4, it is characterized in that: described first back cavity (103) through aforementioned headset shell (100) rear end, being formed with tail end opening (114) in earphone outer covering (100) rear end, this tail end opening (114) place is covered with tail end cover (115).
A kind of bass frequency dividing earphone the most according to claim 4, it is characterised in that: described first annular portion (12) front group, equipped with upper cover (20), this upper cover (20) offers some senders, and aforementioned horn assembly is capped (20) and covers in inside.
A kind of bass frequency dividing earphone the most according to claim 4, it is characterized in that: being connected between described second ring part (13) and baseplate part (11) has some ribs (18), aforementioned first auxiliary air-vent (16) is positioned between adjacent ribs (18).
A kind of bass frequency dividing earphone the most according to claim 4, it is characterized in that: be designed as the biggest formula cone mesa structure after going between described second ring part (13) lateral surface and baseplate part (11) front end face, aforementioned first auxiliary air-vent (16) is opened at this frustum face.
A kind of bass frequency dividing earphone the most according to claim 1, it is characterized in that: corresponding each second auxiliary air-vent (17) of described first annular portion (12) lateral surface is arranged with annular slot to make way (19), resistance sound paper corresponding to aforementioned second auxiliary air-vent (17) is designed as monoblock type arc resistance sound paper (91), and this monoblock type arc resistance sound paper (91) is heavy to be located in annular slot to make way (19).
A kind of bass frequency dividing earphone the most according to claim 4, it is characterized in that: the resistance sound paper corresponding to described first auxiliary air-vent (16) is designed as integral annular resistance sound paper (92), this integral annular resistance sound paper (92) together covers on all first auxiliary air-vent (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620119496.9U CN205545800U (en) | 2016-02-14 | 2016-02-14 | Bass frequency division earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620119496.9U CN205545800U (en) | 2016-02-14 | 2016-02-14 | Bass frequency division earphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205545800U true CN205545800U (en) | 2016-08-31 |
Family
ID=56778322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620119496.9U Withdrawn - After Issue CN205545800U (en) | 2016-02-14 | 2016-02-14 | Bass frequency division earphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205545800U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105592378A (en) * | 2016-02-14 | 2016-05-18 | 东莞市丰纶电子科技有限公司 | Bass frequency division earphone |
| CN111491224A (en) * | 2019-01-25 | 2020-08-04 | 深圳市冠旭电子股份有限公司 | Ear muff of noise reduction earphone and head-wearing noise reduction earphone |
-
2016
- 2016-02-14 CN CN201620119496.9U patent/CN205545800U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105592378A (en) * | 2016-02-14 | 2016-05-18 | 东莞市丰纶电子科技有限公司 | Bass frequency division earphone |
| CN105592378B (en) * | 2016-02-14 | 2018-10-12 | 东莞市丰纶电子科技有限公司 | A kind of bass frequency dividing earphone |
| CN111491224A (en) * | 2019-01-25 | 2020-08-04 | 深圳市冠旭电子股份有限公司 | Ear muff of noise reduction earphone and head-wearing noise reduction earphone |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160831 Effective date of abandoning: 20181012 |
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| AV01 | Patent right actively abandoned |