CN105163231B - A kind of earphone sounding cavity that tone color can be improved and for the damping diaphragm in the sounding cavity - Google Patents

A kind of earphone sounding cavity that tone color can be improved and for the damping diaphragm in the sounding cavity Download PDF

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Publication number
CN105163231B
CN105163231B CN201510452063.5A CN201510452063A CN105163231B CN 105163231 B CN105163231 B CN 105163231B CN 201510452063 A CN201510452063 A CN 201510452063A CN 105163231 B CN105163231 B CN 105163231B
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cavity
electroacoustic
earphone
tone color
damping
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CN201510452063.5A
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Chinese (zh)
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CN105163231A (en
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刘国清
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东莞市魔卡师电子科技有限公司
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Abstract

It the invention discloses a kind of earphone sounding cavity that tone color can be improved and for the damping diaphragm in the sounding cavity, is made of auricular concha and horn bracket, accommodating space is formed in auricular concha, horn bracket is fixed on auricular concha port part;Attachment is provided with electroacoustic damping diaphragm in accommodating space, which constitutes electroacoustic liner cavity corresponding with accommodating space shape, is provided with damping cushion rubber between the electroacoustic liner cavity bottom surface and accommodating space bottom surface.Damping diaphragm includes: that buffer layer and film layer are compounded to form, and the raw material of buffer layer is made of mica powder, silicon rubber, epoxy resin composition.Accommodating space of the present invention in auricular concha is formed with the electroacoustic liner cavity being made up of electroacoustic damping diaphragm, the sound chamber of earphone is made of the electroacoustic liner cavity, due to the presence of damping diaphragm, it will be absorbed into the intracavitary sound wave of sound, reduce the reflection of high frequency waves and the diffraction of low frequency wave, to effectively reduce the generation of noise, the sounding tone color of earphone is promoted.

Description

A kind of earphone sounding cavity that tone color can be improved and for subtracting in the sounding cavity Shake diaphragm

Technical field:

The present invention relates to earphone products technical field, a kind of earphone sounding cavity that tone color can be improved is refered in particular to and for should Damping diaphragm in sounding cavity.

Background technique:

There are many factor for influencing the sounding effect of earphone, such as in the relevant parameter index of earphone, for sound quality harmony Field positions this " soft quota " for making evaluation mainly by subjective audition and can not state.Different manufacturers similar in one frequency response curve Earphone, to its sound quality feel harmony field reproduce have larger difference, this has been the common understanding of earphone fans.

The difference of earphone sound quality is easier to understand, people will recognize that material, size, structure and the earphone of this and vibrating diaphragm The design of cavity is related.As the high-pitched speaker unit in speaker, diaphragm materials have the inscription of matter one matter, one tiffany ... of cloth etc. by the emperor himself Deng the different people of sound quality are easy to imagine that.It is just more messy but for the difference that earphone sound field and auditory localization show Clearly.

General earphone can be divided into according to principle of sound difference: moving coil earphone, electrostatic earphone, piezoelectric earphone.Its In for the most common moving coil earphone comprising have: closed (enclosed), open (open type) and semi open model (half Open type) point, due to the difference of its structure, when audition, can also generate different " comb filter " effects, due to closed cavity Low frequency is set to be improved, this some ear canal natural resonance for allowing for middle low-frequency range is blanked, the width that other pectinations are fallen Degree, number, interval are also affected, this just destroys the impression of normal straight frequency response, thus destroys to a certain extent The sense of reality of sound.If making one to sound uncomfortable in addition, improper also will form of enclosed earphone damping design is thundered.

The case where for open-type headphone.Open-type headphone has " channel " connected with atmosphere, this channel or vibrating diaphragm The subsequent ventilative cavity of the breathing ear cushion or vibrating diaphragm of front is all logical before and after clear-cut " working along both lines " for having.This " channel " resistance Buddhist nun has fallen low-frequency resonant, has eliminated the feeling of thundering that may cause, but simultaneously also it is more or less forced down us required for Ear canal resonance, be modulated normal " comb filter " effect, normally listened to also affect to a certain extent Sound condition.

For special designing semi open model earphone the case where.This knot is that earphone and ear pad are all air-locked, uses Be more vibrating diaphragm systems, earphone principal earthquake film is not direct communicates with atmosphere, but around it branch and six it is passive driven Film is shaken, these driven shake films use very thin high compliance material and are made, and work according to sound bypass module mechanism.And dexterously make The phase of six driven shake films slightly has difference, and auditor is made to generate a printing, it appears that and the auricular concha of himself is also working, thus Provide the feeling of a space multistory sense and space opening.The earphone of this structure is in the reduction of sound field and the location sense of musical instrument There is its apparent advantage.

It will be seen that, there are many factor for influencing earphone sounding effect by above, and the present invention will be from earphone sounding cavity Aspect is interpreted.General earphone all has a sound chamber for empathizing, this sound chamber is set to shell for earphone Interior, the sound wave that loudspeaker generate will be in the intracavitary formation sympathetic response of the sound, and the material of sound chamber, structure are different, and the tone color of sounding is just not yet Together.So-called tone color (musical quality) refers to the sense quality of sound.The height of tone is decided by sounding body vibration Frequency, the size of loudness is decided by the amplitude of sounding body vibration, but different sounding bodies is due to material, structure difference, sending sound The tone color of sound is also just different, improves the tone color of earphone, depends primarily on the setting of sound chamber.So being needed to promote the tone color of earphone The cavity to have used, then good horn single body, if it is not matching and pair material cavity, what that was difficult to hear pair Sound quality, and enjoy the romantic charm of music.This puts us and can be further analyzed according to the acoustic characteristic of structure.? The problem of structure design early stage just considers structural vibration and sound, and complete to design the dynamic acoustic of structure, to meet them Low vibration, the design requirement of low noise improve earphone audition comfort, while reducing the research and development cost of electroacoustic cavity and improving electricity The hidden sound ability of the sound after being made into finished product of operatic tunes body.In addition, thering is scholar to think at present: being respectively provided with pressure in the cavity of sound chamber It is that small damping part is anti-that gradient, elastic plate surface unit normal vector, which (are directed toward elastic plate by cavity to be positive) remaining five face of cavity, Surface, surface Particle Vibration Velocity are answered, the specific acoustic impedance on local reaction surface has critical connection, solves again It releases there are two types of plate-chamber coupled system glottis neoplasms, chamber control mode and plate control mode, for chamber control mode, most of energy storage Is for n-th of chamber control formant acoustic pressure in sound field, and n-th order chamber control mode acoustic pressure plays a decisive role, and only m rank template die state Coupling with n-th order cavity mold state plays a decisive role to n-th order chamber control mode acoustic pressure, and between satisfaction, and plate, cavity wall surface hinder The influence of Buddhist nun, and can not ignore.Briefly, when the sonic transmissions of loudspeaker generation are into the sound chamber of earphone, when arrival sound After cavity wall, the sound wave of low frequency will generate diffraction, and the sound wave of high frequency will generate reflection, when different sound wave superpositions will shape At noise, the sounding effect of earphone is enabled to be distorted.So it is generally necessary in the intracavitary setting vibration-absorptive material of sound.To improve the sounding of earphone Tone color.But traditional cushion technique is usually tone color, the sound quality that earphone is improved using different auricular concha materials, the present invention People researchs and proposes following technical scheme according to long-term, can the production shell for earphone to any materials improve its tone color.

Summary of the invention:

First technical problem to be solved by this invention is that overcoming the deficiencies of the prior art and provide one kind can be improved sound The earphone sounding cavity of color and for the damping diaphragm in the sounding cavity.

In order to solve above-mentioned first technical problem, present invention employs following technical solutions: the ear of tone color is can be improved in this Machine sounding cavity is made of auricular concha and horn bracket, and accommodating space is formed in auricular concha, and the horn bracket is fixed on auricular concha Port part;Attachment is provided with electroacoustic damping diaphragm in the accommodating space, which is constituted and accommodating space shape pair The electroacoustic liner cavity answered is provided with damping cushion rubber between the electroacoustic liner cavity bottom surface and accommodating space bottom surface.

Furthermore, in above-mentioned technical proposal, the damping diaphragm includes: that buffer layer and film layer are compounded to form, The raw material of the buffer layer is made using mica powder, silicon rubber, with epoxy resin composition.

Furthermore, in above-mentioned technical proposal, the electroacoustic liner cavity includes: circular side wall and bottom plate, institute The damping cushion rubber stated is arranged between bottom plate and accommodating space bottom surface, i.e., is formed with gap between bottom plate and accommodating space bottom surface.

Furthermore, in above-mentioned technical proposal, it is described constitute electroacoustic liner cavity side wall and bottom plate using one at Type production, alternatively, the side wall for constituting electroacoustic liner cavity and bottom plate are using splicing production.

Furthermore, in above-mentioned technical proposal, sound hole is offered on the bottom plate.

Second technical problem to be solved by this invention is to provide a kind of for the earphone sounding chamber of tone color to can be improved Damping diaphragm in body.

In order to solve above-mentioned second technical problem, present invention employs following technical solutions: the damping diaphragm includes: to subtract Shake layer and film layer are compounded to form, and the raw material of the buffer layer is using mica powder, silicon rubber and epoxy resin composition system At.

Furthermore, in above-mentioned technical proposal, mica powder, the matter of silicon rubber and epoxy resin in the buffer layer Measure percentage are as follows: mica powder: 10-80%;Silicon rubber: 10-89%;Epoxy resin: 1-20%.

Furthermore, in above-mentioned technical proposal, the mica powder is sericite in powder.

Furthermore, in above-mentioned technical proposal, the film layer uses: polyethylene, polypropylene, polyvinyl chloride are any A kind of material or combination are made.

After adopting the above technical scheme, compared with prior art, the present invention has the following advantages:

1, accommodating space of the present invention in auricular concha is formed with the electroacoustic internal bladder cavity being made up of electroacoustic damping diaphragm Body is made of the sound chamber of earphone the electroacoustic liner cavity.Due to the presence of damping diaphragm, by enter the intracavitary sound wave of sound into Row absorbs, and reduces the reflection of high frequency waves and the diffraction of low frequency wave, to effectively reduce the generation of noise, promotes the sounding of earphone Tone color.

2, the vibration formed, the bottom surface of the electroacoustic liner cavity are impacted in order to further reduce sound wave to damping diaphragm It is provided with damping cushion rubber, which can further adsorb sonic impinging damping diaphragm and be formed by vibration, further Reduce the generation of noise.

3, damping diaphragm can effectively improve the damped coefficient and damping coefficient of sound chamber, and the sounding cavity formed in this way can be with Stable, harmonious sounding effect is formed, makes sound quality excessively dry and astringent, will not be generated because of roars of laughter sound and high-frequency noise caused by inhaling wave very little It can not fully absorb.

4, for the damping effect for damping diaphragm of refreshing oneself, present invention employs mica powder, mica powder has good sound-absorbing Effect, in addition damping diaphragm also has the silicon rubber of excellent elasticity, and as the epoxy resin of binder, by mica powder, Elastic silicone rubber carries out the buffer layer that production is formed in damping diaphragm after mixing according to a certain percentage with epoxy resin.In order into One step improves the wilfulness and intensity of damping diaphragm, which carries out compound with a film layer.

Detailed description of the invention:

Fig. 1 is the perspective view of the embodiment of the present invention one;

Fig. 2 is the perspective view of electroacoustic liner cavity in the embodiment of the present invention one;

Fig. 3 is the stereogram exploded view of the embodiment of the present invention one;

Fig. 4 is the structural schematic diagram of damping diaphragm in the embodiment of the present invention one;

Fig. 5 is the perspective view of the embodiment of the present invention two;

Fig. 6 is the perspective view of electroacoustic liner cavity in the embodiment of the present invention two;

Fig. 7 is the stereogram exploded view of the embodiment of the present invention two.

Specific embodiment:

The present invention is further described with attached drawing combined with specific embodiments below.

As shown in figure 1 to 3, this is the first embodiment of the present invention, and earphone is using headphone in the present embodiment. The earphone includes: auricular concha 1, horn bracket 2, electroacoustic liner cavity 30, horn single body 20, bracket 5, ear muff 6.

Accommodating space 10 is wherein formed in auricular concha 1, the horn bracket 2 is fixed on 1 port of auricular concha by bracket 5 Place, horn single body 20 are fixed on horn bracket 2, and such auricular concha 1 and horn bracket 2 constitute the sounding chamber that space forms earphone Body.The electroacoustic liner cavity 30 is located in the generation cavity body.Ear muff 6 is made of flexible material, is fixed on loudspeaker branch The lateral surface of frame 2, when use, will be set on the ear of user, and audition cavity is formed in ear muff 6.

As shown in connection with fig. 3, auricular concha 1 (certainly, can also be using other materials, such as using wooden structure in the present embodiment Metal, plastic or other material), inside offer an accommodating space 10, the inner wall of the accommodating space 10 and bottom surface are attached with electricity Sound damping diaphragm 3, which constitutes electroacoustic liner cavity 30 corresponding with 10 shape of accommodating space, in the electroacoustic liner 30 bottom surface of cavity and accommodating space are provided with damping cushion rubber 4 between 10 bottom surface.The electroacoustic liner cavity 30 faces fixation Horn single body 20 on horn bracket 2.Sound wave will form sympathetic response in the electroacoustic liner cavity 30.

As shown in connection with fig. 2, the electroacoustic liner cavity 30 includes: circular side wall 31 and bottom plate 32, the damping Cushion rubber 4 is arranged between 10 bottom surface of bottom plate 32 and accommodating space, i.e., is formed with gap between 10 bottom surface of bottom plate 32 and accommodating space. Silica gel material can be used in damping cushion rubber 4, and quality is flexible, has preferable damping, sound-absorbing, soundproof effect.

In the present embodiment, the side wall 31 for constituting electroacoustic liner cavity 30 and bottom plate 32 are using integrated molding production.When So, 10 inner wall of accommodating space and bottom surface then can also be bonded in by glue using making respectively.

In addition, offering sound hole 320 on the bottom plate 32 to improve the sounding sound quality of earphone.When loudspeaker generation sound When wave is transmitted to bottom plate 32, it is possible to reduce the damping of sound wave thus will not enable the sound quality of sounding dry and astringent.These sound holes 320 Quantity can be arranged according to the volume and depth of electroacoustic liner cavity 30, and the moulding of sound hole 320 can be circle, rectangle, three Any moulding such as angular.

Shown in Figure 4, the damping diaphragm 3 includes: that buffer layer 301 and film layer 302 are compounded to form, and described subtracts The raw material of shake layer 301 is made using mica powder, silicon rubber, with epoxy resin composition.The film layer uses: poly- second Any one material of alkene, polypropylene, polyvinyl chloride or combination are made.

Mica powder, the mass percent of silicon rubber and epoxy resin in the buffer layer 301 are as follows:

Mica powder: 10-80%;

Silicon rubber: 10-89%;

Epoxy resin: 1-20%.

The mass percent used in the present embodiment are as follows: mica powder: 40%;Silicon rubber 55%;Epoxy resin: 5%.

Mica powder described in the present embodiment is sericite in powder.Sericite is one kind of mica, it belongs to stratiform knot The silicate mineral of structure draws.Sericite is under the jurisdiction of monoclinic crystal, and crystal is flakey, and having silky luster, (muscovite is in glass Glass gloss), pure piece of gray, purple rugose rose (Rosa rugosa var typica) color, white etc., radius-thickness ratio > 80, specific gravity 2.6~2.7, mole hardness is 2-3, rich bullet Property, flexible, wear resistence and wearability are good;High temperature insulation, is insoluble in acid-base solution, and chemical property is stablized.Test data: elasticity Modulus is 1505-2134MPa, 500~600oC of heat resistance, 0.419~0.670W. of thermal conductivity (m.K) -1, electrical insulating property 200kv/mm, 5 × 1014 thermal neutrons of radioresistance/cm2 is to illumination.

Sericite have very extensive purposes, for rubber, plastics, coating, paint, ceramics, heat preservation, cosmetics, pigment, The industries such as papermaking, metallurgy.

Silicon rubber is that main chain is alternately made of silicon and oxygen atom, and the rubber there are two organic group is usually connected on silicon atom. Silicon rubber has good flexibility and elasticity.The adoptable silicon rubber of the present invention includes: dimethyl silicone rubber, methyl ethylene Silicon rubber, vinylsiloxane rubber, methyl phenyl vinyl silicone rubber, penylene and phenylate support silicon rubber etc..

Why damping diaphragm 3 of the invention can play preferable damping effect, formally based on the characteristic of sericite, by It is ultra-fine in the granularity of sericite, possess extremely strong appearance energy, sericite particle is distributed, coated plentifully, structure silicon rubber is well-balanced At collective network shape structure, to form good damping effect.

In addition, sea needs to add a certain amount of epoxy resin in the present invention in order to improve the molding intensity of damping diaphragm 3. Epoxy resin is a kind of resin very widely used at present, usually refers to and contains two or more epoxy groups in molecule The organic compound of group send out them can with a plurality of types of curing agent due to containing active epoxy group in molecular structure It gives birth to cross-linking reaction and forms the insoluble high polymer with three-dimensional reticular structure.The present invention can be used glycerol amine epoxy resin, The epoxy resin such as phenolic aldehyde multi-epoxy resin play further female powder end, silastic material with preferable adhesive property Adhesive effect, so that enabling the damping diaphragm 3 of support has certain wilfulness and intensity, it is not easy to be broken.

As shown in Fig. 5-7, this is the second embodiment of the present invention, and earphone is using PlayGear Stealth in the present embodiment. The earphone includes: auricular concha 1A, horn bracket 2A, electroacoustic liner cavity 30A, horn single body 20A, ear muff 6A.Not with embodiment one Together, the horn bracket 2A of the present embodiment two is the nut cap moulding of one with auricular concha 1A cooperation, is wherein formed with accommodating in auricular concha 1A Space 10A, the horn bracket 2A are fixed at the port auricular concha 1A, and horn single body 20A is fixed on horn bracket 2A, in this way Auricular concha 1A and horn bracket 2A constitutes the sounding cavity that space forms earphone.The electroacoustic liner cavity 30A is located at the sounding In cavity.Ear muff 6A is made of flexible material, is fixed on the lateral surface of horn bracket 2A, and when use will fill in user's In ear.

Shown in Figure 7, electroacoustic liner cavity 30A makes molding using integrally formed mode in the present embodiment, wraps It includes: side wall 31A and bottom plate 32A, what is different from the first embodiment is that two insole board 32A of the present embodiment is arc surface, the damping Cushion rubber 4A is arranged between 10 bottom surface bottom plate 32A and accommodating space, i.e. is formed between bottom plate 32A and the bottom surface accommodating space 10A Gap.

Due to being equipped with the tramline caudal peduncle 11A passed through for conducting wire on auricular concha 1A, so needing to open up on side wall 31A pair The tramline perforation 310A answered.The presence of tramline perforation 310A will not impact electroacoustic liner cavity 30A.

Certainly, the above is only a specific embodiment of the present invention, be not to limit the scope of the present invention, it is all according to The equivalent change or modification that structure, feature and principle described in scope of the present invention patent is done should be included in Shen of the present invention It please be in the scope of the patents.

Claims (8)

1. a kind of earphone sounding cavity that tone color can be improved, the sounding cavity are made of auricular concha and horn bracket, formed in auricular concha There is accommodating space, the horn bracket is fixed on auricular concha port part;It is characterized by:
Attachment is provided with electroacoustic damping diaphragm in the accommodating space, which constitutes corresponding with accommodating space shape Electroacoustic liner cavity is provided with damping cushion rubber between the electroacoustic liner cavity bottom surface and accommodating space bottom surface;
The damping diaphragm includes: that buffer layer and film layer are compounded to form;
The film layer uses: any one material of polyethylene, polypropylene, polyvinyl chloride or combination are made;
The electroacoustic liner cavity includes: circular side wall and bottom plate, and the damping cushion rubber setting is empty in bottom plate and accommodating Between between bottom surface, i.e., be formed with gap between bottom plate and accommodating space bottom surface.
2. a kind of earphone sounding cavity that tone color can be improved according to claim 1, it is characterised in that: the absorber film The raw material of buffer layer in piece is made using mica powder, silicon rubber, with epoxy resin composition.
3. a kind of earphone sounding cavity that tone color can be improved according to claim 1, it is characterised in that: the composition electroacoustic The side wall and bottom plate of liner cavity are using integrated molding production;Alternatively, the side wall for constituting electroacoustic liner cavity and bottom plate are adopted It is made of splicing.
4. a kind of earphone sounding cavity that tone color can be improved according to claim 1, it is characterised in that: opened on the bottom plate Equipped with sound hole.
5. the damping diaphragm in a kind of earphone sounding cavity for tone color to can be improved, it is characterised in that: the damping diaphragm includes: Buffer layer and film layer are compounded to form, and the raw material of the buffer layer uses mica powder, silicon rubber and epoxy resin composition It is made.
6. the damping diaphragm in a kind of earphone sounding cavity for tone color to can be improved according to claim 5, feature It is: mica powder, the mass percent of silicon rubber and epoxy resin in the buffer layer are as follows:
Mica powder: 10-80%;
Silicon rubber: 10-89%;
Epoxy resin: 1-20%.
7. the damping diaphragm in a kind of earphone sounding cavity for tone color to can be improved according to claim 6, feature Be: the mica powder is sericite in powder.
8. the damping diaphragm in a kind of earphone sounding cavity for tone color to can be improved according to claim 6, feature Be: the film layer uses: any one material of polyethylene, polypropylene, polyvinyl chloride or combination are made.
CN201510452063.5A 2015-07-29 2015-07-29 A kind of earphone sounding cavity that tone color can be improved and for the damping diaphragm in the sounding cavity CN105163231B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101854572A (en) * 2010-06-14 2010-10-06 清华大学 Earphone
CN103414974A (en) * 2013-07-12 2013-11-27 东莞市启原实业有限公司 Loudspeaker sound chamber structure
CN204887370U (en) * 2015-07-29 2015-12-16 李联群 Can improve earphone sound production cavity of tone quality

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030103637A1 (en) * 2001-12-04 2003-06-05 Jui-Shu Huang Headphone

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101854572A (en) * 2010-06-14 2010-10-06 清华大学 Earphone
CN103414974A (en) * 2013-07-12 2013-11-27 东莞市启原实业有限公司 Loudspeaker sound chamber structure
CN204887370U (en) * 2015-07-29 2015-12-16 李联群 Can improve earphone sound production cavity of tone quality

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