CN209608823U - Earphone cavity body structure and earphone with it - Google Patents

Abstract

The utility model discloses a kind of earphone cavity body structure, for installing phonation unit, the earphone cavity body structure includes shell and rear chamber lid, phonation unit accommodating cavity is equipped in the shell, it is connected to and leads acoustic aperture and connection in the rear chamber of the rear end of the phonation unit accommodating cavity in the front end of the phonation unit accommodating cavity, chamber lid lid closes at the rear chamber after described, chamber lid at least has absorption and diffraction structure in partial region after described, the absorption and diffraction structure are used to absorb the acoustic wave segment that the rear end air inlet of phonation unit generates outward and the unabsorbed acoustic wave segment of diffraction is to rear chamber.The earphone cavity body structure of the utility model guarantees to be returned again to the inside of phonation unit substantially while phonation unit air inlet by the sound wave that the rear end air inlet of phonation unit issues, and avoids the interference caused by vibrating diaphragm sounding.In addition, the invention also discloses a kind of earphones.

Description

Earphone cavity body structure and earphone with it

Technical field

The utility model relates to ear phone technology field more particularly to a kind of earphone cavity body structure and with its earphone.

Background technique

A kind of single moving iron unit of earphone is equipped with rear end air inlet to increase air inflow, to effectively play its frequency acoustic Performance.But single moving iron unit sound wave in sounding a small amount of can generate outward from rear end air inlet, but due to existing earphone Seal cavity structure does not have vacant rear cavity space, so the sound wave that rear end air inlet generates will be reflected by rear chamber lid leads to rear end It is inside the sound wave backtracking that air inlet issues to single moving iron unit and compound with the sound wave of unit vibrating diaphragm sending, to a certain extent Normal sounding is disturbed, the low-frequency sound pressure actually generated will be less than design acoustic pressure.

In addition, the ante-chamber of existing earphone has used through type phonocatheter structure, Acoustic treatment is not done, so will lead to one The comb-filter effect (standing wave repeatedly is generated in conduit) for determining degree, so that medium-high frequency has the obvious discordant feelings of burr sense Condition disturbs the propagation of sound.Moreover, the phonocatheter that existing earphone uses is mostly plastic catheter, inner wall is comparatively coarse, Simultaneously its material itself have certain flexibility, cause sound wave that can be cancelled and absorb to a certain extent, and can generate it is unnecessary Reverberation, listen sound quality to reduce.

Utility model content

The purpose of this utility model is to provide a kind of earphone cavity body structure, can substantially reduce influences normal sounding.

The another object of the utility model is to provide a kind of earphone, can substantially reduce the influence to normal sounding.

To achieve the goals above, the utility model provides a kind of earphone cavity body structure, for installing phonation unit, institute Stating earphone cavity body structure includes shell and rear chamber lid, and phonation unit accommodating cavity, connection are equipped in the shell in the sounding list Acoustic aperture and connection are led in the rear chamber of the rear end of the phonation unit accommodating cavity, the rear chamber lid lid in the front end of first accommodating cavity It closes at the rear chamber, the rear chamber lid at least has absorption and diffraction structure, the absorption and diffraction knot in partial region Structure is used to absorb the acoustic wave segment that the rear end air inlet of phonation unit generates outward and the unabsorbed acoustic wave segment of diffraction is to institute State rear chamber.

Preferably, the absorption and diffraction structure are rough grain structure.

Preferably, the rear chamber is configured as providing biography between chamber lid and the rear end air inlet of phonation unit after described Space is broadcast, the periphery of the rear chamber exceeds the phonation unit accommodating cavity outward.

Preferably, the phonation unit accommodating cavity is connected in the front end of the rear chamber, the phonation unit inclinedly The relatively described rear chamber lid of accommodating cavity is inclined to set.

Preferably, the shell includes the earplug portion extended in front-rear direction, the earplug portion extends equipped with front-rear direction Leading acoustic aperture, it is described lead acoustic aperture include along the phonation unit accommodating cavity extending direction extend after lead acoustic aperture and with institute The leading acoustic aperture of acoustic aperture inclination connection is led after stating.

Preferably, the shell is high-density hard material, described lead when acoustic aperture is formed by the shell is formed.

Preferably, the hole wall for leading acoustic aperture is formed with resist sagging resin.

Preferably, the length for leading acoustic aperture is 1/4 of the length of 1KHz wavelength in free found field.

In order to achieve the above-mentioned another object, the utility model provides a kind of earphone, including earphone cavity body structure and hair Sound unit, the earphone cavity body structure is as described above, the phonation unit is set to the phonation unit accommodating cavity, the sounding list Member is equipped with rear end air inlet.

Preferably, described lead is equipped with low-pass filter in acoustic aperture.

Compared with prior art, the earphone cavity body structure of the utility model is equipped with back cavity in the rear end of phonation unit accommodating cavity Room, rear chamber lid to less than partial region there is absorption and diffraction structure, absorption and diffraction structure can absorb phonation unit Acoustic wave segment that rear end air inlet generates outward and the unabsorbed acoustic wave segment of diffraction are to rear chamber；So that this is practical new The earphone cavity body structure of type guarantees that the sound wave issued while phonation unit air inlet by the rear end air inlet of phonation unit is basic It will not return again to the inside of phonation unit, avoid the interference caused by vibrating diaphragm sounding.Further, since leading acoustic aperture is by highly dense Degree hard material shell molding when formed, substantially will not the deformation by external force, avoid therefore caused by Acoustic Wave Propagation It influences；And because the hole wall for leading acoustic aperture is formed with resist sagging resin, so that the hole wall for leading acoustic aperture has the smoothness of mirror surface grade, The loss in propagation process of sound wave is effectively reduced, and largely reduces the generation of unwanted harmonics, to substantially reduce Influence to sound transmission, ensure that the quality of audition.In addition, the earphone of the utility model by lead be arranged in acoustic aperture it is low Bandpass filter can effectively reduce the burr sense of medium-high frequency, further improve the quality of audition.

Detailed description of the invention

Fig. 1 is the schematic perspective view of the utility model embodiment earphone.

Fig. 2 is the decomposition texture schematic diagram of earphone shown in Fig. 1.

Fig. 3 is the frequency response curve figure using the earphone of the rear chamber lid with smooth texture structure.

Fig. 4 is the frequency response curve figure using the earphone of the rear chamber lid with rough grain structure.

Specific embodiment

For technology contents, the construction feature, the effect realized that the utility model is described in detail, below in conjunction with embodiment And attached drawing is cooperated to be explained in detail.

Fig. 1 and Fig. 2 are please referred to, the utility model discloses a kind of earphone cavity body structures 1, for installing phonation unit 5, ear Machine cavity body structure 1 includes shell 10 and rear chamber lid 20, phonation unit accommodating cavity 11 is equipped in shell 10, connection is held in phonation unit That sets the front end of chamber 11 leads acoustic aperture 12 and connection in the rear chamber 13 of the rear end of phonation unit accommodating cavity 11, and the rear lid of chamber lid 20 closes At rear chamber 13, rear chamber lid 20 has absorption and diffraction structure 21 to less than partial region, absorbs and diffraction structure 21 is used for It absorbs the acoustic wave segment that generates outward of rear end air inlet 51 of phonation unit 5 and the unabsorbed acoustic wave segment of diffraction is to rear chamber 13。

The earphone cavity body structure 1 of the utility model is equipped with rear chamber 13, rear chamber lid in the rear end of phonation unit accommodating cavity 11 20 absorb and diffraction structure 21 to having less than partial region, absorb and after diffraction structure 21 can absorb phonation unit 5 The acoustic wave segment that generates outward of end air inlet 51 and the unabsorbed acoustic wave segment of diffraction are to rear chamber 13；So that this is practical Novel earphone cavity body structure 1 guarantees the sound issued while 5 air inlet of phonation unit by the rear end air inlet 51 of phonation unit 5 Wave will not be returned again to the inside of phonation unit 5 substantially, avoid the interference caused by vibrating diaphragm sounding.

In some embodiments, it absorbs and diffraction structure 21 is rough grain structure, only need simply to design i.e. whereby It may achieve the effect of absorption and diffraction sound wave.Absorption and diffraction structure 21 are formed simultaneously when can be rear 20 one-pass molding of chamber lid, Processing formation can also be carried out to preliminary rear chamber lid 20 after molding again, absorb and diffraction structure 21 is also possible to be incorporated in back cavity On the ontology of lid 20, this is not restricted, as long as being that by absorption and diffraction function；It absorbs and diffraction structure 21 is same Sample also should not be limited to rough grain structure.

Incorporated by reference to Fig. 3 and Fig. 4, Fig. 3 and Fig. 4 are respectively the earphone using the rear chamber lid 20 with smooth texture structure and adopt With the frequency response curve figure of the specific example of the earphone of the rear chamber lid 20 with rough grain structure.By comparison it is found that using tool There is the earphone of the rear chamber lid 20 of rough grain structure that can obtain more preferably frequency response effect.

In some embodiments, rear chamber 13 be configured as rear chamber lid 20 and phonation unit 5 rear end air inlet 51 it Between communication space is provided, the periphery of rear chamber 13 exceeds phonation unit accommodating cavity 11 outward；By the design, it is capable of providing enough Acoustic wave diffraction space, further reduced the influence to normal sounding.Specifically, the inner wall of rear chamber 13 is in hard light It is sliding.The shape of rear chamber 13 with no restriction, furthermore it is possible to be cylinder, elliptical cylinder-shape etc..

In some embodiments, shell 10 is additionally provided with string holes 14, one end of string holes 14 through rear chamber 13 inner wall for Earphone cable 6 is pierced by via rear chamber 13 and string holes 14.

In some embodiments, phonation unit accommodating cavity 11 is connected to inclinedly in the front end of rear chamber 13, phonation unit The relatively rear chamber lid 20 of accommodating cavity 11 is inclined to set；By the design so that phonation unit shown in FIG. 15 be equipped with rear end into Angled setting between the rear end face of stomata 51 and rear chamber lid 20 can further avoid because sound wave is back to phonation unit 5 Influence of the inside to vibrating diaphragm sounding.

In some embodiments, shell 10 includes the earplug portion 15 extended in front-rear direction, and earplug portion 15 is equipped with front and back To the leading acoustic aperture 121 of extension, leading acoustic aperture 12 includes leading acoustic aperture 122 after extending along the extending direction of phonation unit accommodating cavity 11 And acoustic aperture 122 is led with after and tilts the leading acoustic aperture 121 being connected to.Specifically, it is equipped with low-pass filter 7 in leading acoustic aperture 121, To effectively reduce the burr sense of medium-high frequency, the quality of audition is further promoted.

In some embodiments, shell 10 is high-density hard material, leads when acoustic aperture 12 is formed by shell 10 and is formed；To So that lead acoustic aperture 12 substantially will not the deformation by external force, influence to Acoustic Wave Propagation caused by avoiding therefore.Specifically, shell Body 10 is formed by 3D printing.

In some embodiments, the hole wall for leading acoustic aperture 12 is formed with resist sagging resin；So that the hole wall for leading acoustic aperture 12 has The smoothness of mirror surface grade effectively reduces the loss in propagation process of sound wave, and largely reduces unwanted harmonics It generates, thus greatly reduces the influence to sound transmission, ensure that the quality of audition.Certainly, in other embodiments, shell 10 can be resist sagging resin in itself.

In some embodiments, the length for leading acoustic aperture 12 is 1/4 of the length of 1KHz wavelength in free found field, meets acoustics Principle produces effective resonance, and the sound wave of 2~3KHz is made to obtain the amplification of 3~5dB, " facing when considerably increasing audition The subjective feeling of field sense ".

In some embodiments, shell 10 is combined by first half-shell 16 and the second half-shell 17, phonation unit accommodating cavity 11, it leads acoustic aperture 12 and rear chamber 13 to be formed when first half-shell 16 is combined with the second half-shell 17, to be conducive to carry out earphone Assembly.

Fig. 1 and Fig. 2 are please referred to, the invention also discloses a kind of earphones, including earphone cavity body structure 1 and sounding list Member 5, for earphone cavity body structure 1 as described in above-described embodiment, phonation unit 5 is set to phonation unit accommodating cavity 11, and phonation unit 5 is equipped with Rear end air inlet 51.Specifically, the gap between phonation unit 5 and phonation unit accommodating cavity 11 is filled by hard resin, It is combined closely with realizing.

In some embodiments, it leads and is equipped with low-pass filter 7 in acoustic aperture 12；By the design, middle height can be effectively reduced The burr sense of frequency, further improves the quality of audition.

Above disclosed is only the preferred embodiments of the utility model, cannot limit the utility model certainly with this Interest field, therefore equivalent variations made according to the patent scope of the utility model still falls within the utility model and covered Range.

Claims (10)

1. a kind of earphone cavity body structure, for installing phonation unit, which is characterized in that the earphone cavity body structure include shell and Chamber lid afterwards, in the shell equipped with phonation unit accommodating cavity, connection the front end of the phonation unit accommodating cavity lead acoustic aperture with And connection, in the rear chamber of the rear end of the phonation unit accommodating cavity, the rear chamber lid lid closes at the rear chamber, after described Chamber lid has absorption and diffraction structure to partial region is less than, and the absorption and diffraction structure are used to absorb the rear end of phonation unit Acoustic wave segment that air inlet generates outward and the unabsorbed acoustic wave segment of diffraction are to the rear chamber.

2. earphone cavity body structure as described in claim 1, which is characterized in that it is described absorption and diffraction structure be rough grain knot Structure.

3. earphone cavity body structure as described in claim 1, which is characterized in that the rear chamber is configured as the chamber lid after described Communication space is provided between the rear end air inlet of phonation unit, the periphery of the rear chamber exceeds the phonation unit outward and holds Set chamber.

4. earphone cavity body structure as claimed in claim 3 inclinedly, which is characterized in that the phonation unit accommodating cavity is connected to In the front end of the rear chamber, the relatively described rear chamber lid of the phonation unit accommodating cavity is inclined to set.

5. earphone cavity body structure as claimed in claim 4, which is characterized in that the shell includes the ear extended in front-rear direction Piston part, the earplug portion are equipped with the leading acoustic aperture that front-rear direction extends, and the acoustic aperture of leading includes along the phonation unit accommodating cavity Extending direction extend after lead acoustic aperture and with it is described after lead acoustic aperture and tilt the leading acoustic aperture that is connected to.

6. earphone cavity body structure as described in claim 1, which is characterized in that the shell is high-density hard material, described It leads when acoustic aperture is formed by the shell and is formed.

7. earphone cavity body structure as described in claim 1, which is characterized in that the hole wall for leading acoustic aperture is formed with resist sagging tree Rouge.

8. earphone cavity body structure as described in claim 1, which is characterized in that the length for leading acoustic aperture is in free found field The 1/4 of the length of 1KHz wavelength.

9. a kind of earphone, which is characterized in that including earphone cavity body structure and phonation unit, the earphone cavity body structure such as right It is required that described in 1 to 8 any one, the phonation unit is set to the phonation unit accommodating cavity, the phonation unit be equipped with rear end into Stomata.

10. earphone as claimed in claim 9, which is characterized in that described lead is equipped with low-pass filter in acoustic aperture.