CN209201292U - A kind of the optimization structure and active noise reduction earphone of independent back cavity - Google Patents
A kind of the optimization structure and active noise reduction earphone of independent back cavity Download PDFInfo
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- CN209201292U CN209201292U CN201822087426.1U CN201822087426U CN209201292U CN 209201292 U CN209201292 U CN 209201292U CN 201822087426 U CN201822087426 U CN 201822087426U CN 209201292 U CN209201292 U CN 209201292U
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Abstract
The utility model discloses a kind of optimization structure of independent back cavity and active noise reduction earphones, and a closed inner-cavity structure is equipped in independent back cavity, and inner-cavity structure is communicated by through-hole with the cavity of independent back cavity.The utility model is by being arranged inner-cavity structure in independent back cavity, acoustical cotton or sound-absorbing powder can be added in inner-cavity structure, its volume for being acoustically equivalent to independent back cavity becomes larger, and the volume and the volume of sound-absorbing powder or acoustical cotton of specific equivalent increase are related to acoustical absorbance properties；The volume of sound-absorbing powder can be adjusted flexibly by the way that inner-cavity structure is arranged in independent back cavity to adjust the low frequency characteristic of SPK-FB in the utility model.
Description
Technical field
The utility model relates to ear phone technology fields, and in particular to a kind of the optimization structure and active noise reduction ear of independent back cavity
Machine.
Background technique
For wear-type active noise reduction earphone, the rear cavity configuration of current overwhelming majority earphones is designed as independent back cavity and sets
Meter, i.e., as shown in Figure 1, earphone includes diaphragm 1, voice coil 2, magnet 3, frame 4, independent back cavity 5 and bleeder port 6.Existing earphone
Independent back cavity 5 is bonded in 4 side of frame of loudspeaker monomer, relative to dependent back cavity, the advantages of using independent back cavity are as follows:
1, the consistency of earphone or so earphone is improved；
2, the consistency between earphone individual is improved；So that the filter parameter of earphone is more easier to design, filtering
Device parameter is higher to the matching degree of different earphones.
To active noise cancelling headphone fed back and feedover be filtered device design before to respectively obtain the biography of SPK-FB
The biography letter characteristic curve of the biography letter characteristic curve and FF-IE of letter characteristic curve and SPK-IE, 3 biography letter characteristic curves and earphone
Cavity body structure is closely related；The independent back cavity of existing active noise reduction earphone has the following disadvantages:
1, the volume of independent back cavity and the low frequency characteristic of SPK-FB biography letter characteristic are in close relations, if independent back cavity is smaller,
The amplitude that SPK-FB passes letter low frequency can reduce, and the gain of filter parameter needs to be turned up to obtain preferable noise reduction effect, parameter
The raising of gain necessarily brings the bottom under noise reduction mode to make an uproar increase；
2, it makes an uproar to reduce bottom, needs to redesign higher volume of independent back cavity, increase action, reduce work effect
Rate；
3, it since independent back cavity needs to guarantee certain volume, constrains the thinner direction earphone Xiang Geng little and develops
4, since the influence factor of SPK-FB biography letter characteristic is varied, independent back cavity volume is only one of them, due to
Technological problems and supplied materials batch problem lead to SPK-FB low frequency variations meeting, and then feedback and feedforward filter parameter is caused to need weight
New design.
Utility model content
Aiming at the shortcomings existing in the above problems, the utility model provides optimization structure and the master of a kind of independent back cavity
Dynamic noise cancelling headphone.
The utility model discloses a kind of optimization structures of independent back cavity, and a closed inner cavity knot is equipped in independent back cavity
Structure, the inner-cavity structure are communicated by through-hole with the cavity of the independent back cavity.
The acoustical cotton or sound-absorbing of preset vol are filled in the inner-cavity structure as a further improvement of the utility model,
Powder.
The through hole is equipped with for preventing acoustical cotton or sound-absorbing powder to be scattered to solely as a further improvement of the utility model,
Screen cloth in vertical back cavity, the mesh diameter of the screen cloth are less than the diameter of sound-absorbing powder.
The inner-cavity structure includes barricade and cover board as a further improvement of the utility model,；
The barricade is fixed in the independent back cavity, and the cover board is fixed at the upper opening of the barricade and cooperates institute
It states barricade and forms a closed inner cavity；
The cover board is equipped with the through-hole.
The barricade is an integral structure with independent back cavity as a further improvement of the utility model, the cover board with
Barricade is adhesively fixed.
The quantity of the through-hole is one or more as a further improvement of the utility model,.
The independent back cavity is equipped with bleeder port as a further improvement of the utility model, and the inner-cavity structure is successively
It is communicated with the outside world by the through-hole, leakage port.
The utility model also provides a kind of active noise reduction earphone, the optimization structure including frame and above-mentioned independent back cavity；
The optimization structural bond of the independent back cavity is in the side of the frame.
Compared with prior art, the utility model has the following beneficial effects:
The utility model can add acoustical cotton or sound-absorbing by the way that inner-cavity structure is arranged in independent back cavity in inner-cavity structure
Powder, the volume for being acoustically equivalent to independent back cavity become larger, the specific volume of equivalent increase and the body of sound-absorbing powder or acoustical cotton
Product is related to acoustical absorbance properties；
The volume of sound-absorbing powder can be adjusted flexibly by the way that inner-cavity structure is arranged in independent back cavity to adjust in the utility model
The low frequency characteristic of SPK-FB.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing active noise reduction earphone；
Fig. 2 is the structural schematic diagram of the optimization structure of independent back cavity disclosed in a kind of embodiment of the utility model；
Fig. 3 is the exploded view of Fig. 1；
Fig. 4 is the structural schematic diagram of active noise reduction earphone disclosed in a kind of embodiment of the utility model.
In figure:
The prior art:
1, diaphragm；2, voice coil；3, magnet；4, frame；5, independent back cavity；6, bleeder port；
The utility model:
10, independent back cavity；11, barricade；12, cover board；13, through-hole；20, frame；30, bleeder port；40, diaphragm；50, sound
Circle；60, magnet.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is a part of the embodiment of the utility model, instead of all the embodiments.Based on the reality in the utility model
Apply example, those of ordinary skill in the art's every other embodiment obtained without making creative work, all
Belong to the range of the utility model protection.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
The utility model is further described in detail with reference to the accompanying drawing:
As shown in Figure 2,3, the utility model provides a kind of optimization structure of independent back cavity, is showed to as shown in Figure 1
There is independent back cavity to optimize, in which: the utility model is equipped with a closed inner-cavity structure in independent back cavity 10, that is, exists
A small cavity is embedded with inside independent back cavity；The acoustical cotton or sound-absorbing powder of preset vol, inner cavity knot are filled in inner-cavity structure
Structure is communicated by through-hole 13 with the cavity of independent back cavity 10.The utility model, can by the way that inner-cavity structure is arranged in independent back cavity
Acoustical cotton is added in inner-cavity structure or sound-absorbing powder, the volume for being acoustically equivalent to independent back cavity become larger, specific equivalent increasing
Big volume and the volume of sound-absorbing powder or acoustical cotton are related to acoustical absorbance properties；The utility model by independent back cavity be arranged in
The volume of sound-absorbing powder can be adjusted flexibly to adjust the low frequency characteristic of SPK-FB in cavity configuration.
It is specific:
The inner-cavity structure of the utility model includes barricade 11 and cover board 12, the specific setting position of inner-cavity structure, shape with
And size can be designed according to actual needs, barricade 11 is fixed in independent back cavity 10 that (specific location can be independent back cavity 10
Bottom or side wall), cover board 12 is fixed, and (can be bonding) be at the upper opening of barricade 11 and cover board 12 cooperates barricade to form an envelope
The inner cavity closed；Specifically, barricade 11 and independent back cavity 10 are integral type injection molding structure, cover board 12 is Nian Jie with barricade 11 solid
It is fixed.
The utility model offers through-hole 13 on cover board 12, and the quantity of through-hole 13 is one or more, the shape of through-hole 13
It can be circular hole, square hole or other shapes.To prevent acoustical cotton or sound-absorbing powder from being scattered in independent back cavity in inner-cavity structure, this is practical
It is novel to be equipped in through hole for preventing acoustical cotton or sound-absorbing powder to be scattered to the screen cloth (not shown) in independent back cavity, screen cloth
Mesh diameter is less than the diameter of sound-absorbing powder.Specifically, screen cloth can be sticked on the outside of mesh, can also be sticked on the inside of mesh, it can also
Screen cloth to be molded into above when making cover board.
The utility model is equipped with bleeder port 30 on independent back cavity 10, and inner-cavity structure passes sequentially through through-hole 13, leakage port 30
It communicates with the outside world, i.e., the bleeder port of entire independent back cavity is in the outside of inner-cavity structure.
When the utility model assembles:
The acoustical cotton or sound-absorbing powder that preset vol is filled in the inner cavity that barricade 11 surrounds, then in the top of barricade 11
Then cover board 12 is covered and forms closed inner cavity on barricade 11 by edge gluing, then adhesive net cloth prevents sound-absorbing on through-hole 13
Powder sheds, and is assembled again with other component after cover board 12 and barricade 11 are bonded securely.
As shown in figure 4, the utility model also provides a kind of active noise reduction earphone, which uses such as Fig. 2-3
Shown in independent back cavity optimization structure, further include frame 20, diaphragm 40,50 and of voice coil in addition to the optimization structure of independent back cavity
Magnet 60, when assembly.The optimization structural bond of independent back cavity is in the side of frame 20；Frame 20, diaphragm 40, voice coil 50 and magnetic
Iron 60 is the conventional structure of existing earphone, therefore its structure and connection relationship are not set forth in detail at this.
Further, shape, size, installation site of the utility model inner-cavity structure etc. are unlimited, and guarantee does not influence
The normal work of earphone other component.
The advantages of the utility model are as follows:
The utility model can add acoustical cotton or sound-absorbing by the way that inner-cavity structure is arranged in independent back cavity in inner-cavity structure
Powder, the volume for being acoustically equivalent to independent back cavity become larger, the specific volume of equivalent increase and the body of sound-absorbing powder or acoustical cotton
Product is related to acoustical absorbance properties；
The volume of sound-absorbing powder can be adjusted flexibly by the way that inner-cavity structure is arranged in independent back cavity to adjust in the utility model
The low frequency characteristic of SPK-FB；
When needing to be promoted low frequency amplitude-frequency characteristic, the utility model can increase acoustical cotton or sound-absorbing powder product, or replacement
Sound-absorbing effect more preferably acoustical cotton or sound-absorbing powder, it is on the contrary then reduce acoustical cotton or sound-absorbing powder product, or replacement sound-absorbing effect it is worse
Sound-absorbing powder or sound-absorbing powder；
When needing to be promoted low frequency amplitude-frequency characteristic, the utility model can increase acoustical cotton or sound-absorbing powder product, or replacement
Sound-absorbing effect more preferably acoustical cotton or sound-absorbing powder, it is on the contrary then reduce acoustical cotton or sound-absorbing powder product, or replacement sound-absorbing effect it is worse
Sound-absorbing powder or sound-absorbing powder.
The above is only the preferred embodiments of the utility model, are not intended to limit the utility model, for this field
Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (7)
1. a kind of optimization structure of independent back cavity, which is characterized in that a closed inner-cavity structure is equipped in independent back cavity, it is described
Inner-cavity structure is communicated by through-hole with the cavity of the independent back cavity；The acoustical cotton of preset vol is filled in the inner-cavity structure
Or sound-absorbing powder.
2. the optimization structure of independent back cavity as described in claim 1, which is characterized in that the through hole is equipped with for preventing from inhaling
Sound cotton or sound-absorbing powder are scattered to the screen cloth in independent back cavity, and the mesh diameter of the screen cloth is less than the diameter of sound-absorbing powder.
3. the optimization structure of independent back cavity as described in claim 1, which is characterized in that the inner-cavity structure includes barricade and lid
Plate；
The barricade is fixed in the independent back cavity, and the cover board is fixed at the upper opening of the barricade and cooperates the gear
Wall forms a closed inner cavity；
The cover board is equipped with the through-hole.
4. the optimization structure of independent back cavity as claimed in claim 3, which is characterized in that the barricade is integrated with independent back cavity
Formula structure, the cover board are adhesively fixed with barricade.
5. the optimization structure of independent back cavity as claimed in claim 3, which is characterized in that the quantity of the through-hole is 1 or more
It is a.
6. the optimization structure of independent back cavity as described in claim 1, which is characterized in that the independent back cavity, which is equipped with, to lose heart
Hole, the inner-cavity structure passes sequentially through the through-hole, leakage port communicates with the outside world.
7. a kind of active noise reduction earphone, which is characterized in that including frame and as after independence of any of claims 1-6
The optimization structure of chamber；
The optimization structural bond of the independent back cavity is in the side of the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822087426.1U CN209201292U (en) | 2018-12-12 | 2018-12-12 | A kind of the optimization structure and active noise reduction earphone of independent back cavity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822087426.1U CN209201292U (en) | 2018-12-12 | 2018-12-12 | A kind of the optimization structure and active noise reduction earphone of independent back cavity |
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| Publication Number | Publication Date |
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| CN209201292U true CN209201292U (en) | 2019-08-02 |
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ID=67428800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201822087426.1U Active CN209201292U (en) | 2018-12-12 | 2018-12-12 | A kind of the optimization structure and active noise reduction earphone of independent back cavity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112423189A (en) * | 2020-10-14 | 2021-02-26 | 瑞声新能源发展(常州)有限公司科教城分公司 | Audio parameter self-adaptive adjusting method and audio system |
-
2018
- 2018-12-12 CN CN201822087426.1U patent/CN209201292U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112423189A (en) * | 2020-10-14 | 2021-02-26 | 瑞声新能源发展(常州)有限公司科教城分公司 | Audio parameter self-adaptive adjusting method and audio system |
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