CN202565444U

CN202565444U - Three-frequency-division coaxial earphone

Info

Publication number: CN202565444U
Application number: CN2012201050822U
Authority: CN
Inventors: 汤卓勋
Original assignee: Individual
Current assignee: Tang Zhuoxun
Priority date: 2012-03-19
Filing date: 2012-03-19
Publication date: 2012-11-28
Anticipated expiration: 2022-03-19

Abstract

The utility model discloses a three-frequency-division coaxial earphone. The three-frequency-division coaxial earphone simulates principles of a single horn earphone structure and a three-frequency-division sound box in the prior art. In the three-frequency-division coaxial earphone, three horns with different diameters are distributed through a front board to be a coaxial one-piece body, and a built-in three-frequency-division circuit board is integrated through an earphone casing to carry out high and low sound frequency-division, so sound reproduction effects of a frequency-division sound box is generated by the earphone, and defects of fuzzy acoustical phase positioning or sound thickness caused by mutual interruption of high and low sound of the single horn in the prior art are settled, and thereby real reproduction of sound frequency signals with different frequency ranges can be better realized, and good directivity of each frequency range, acoustical phase positioning and flat balance of frequency response can be guaranteed. The three-frequency-division coaxial earphone is more suitable for music appreciation and sound detail analysis. The three-frequency-division coaxial earphone combines principles of the single horn earphone and the frequency-division sound box in the prior art. The three horns with different diameters are respectively fixed on the front board in an axial direction distribution in design to make the three horns arranged side by side in an axial direction; and support walls which form independent chambers are distributed among all the three horns to reduce mutual interruption among each unit and taken as foundations for fixing each horn. According to the three-frequency-division coaxial earphone, the frequency-division circuit is directly integrated in the casing to be a fixed assembly of a whole product of the earphone.

Description

The coaxial earphone of three frequency division

[technical field]

The utility model relates to the coaxial earphone of a kind of three frequency division.

[background technology]

At present; The various earphone products that can see on the market are essentially single loudspeaker standard; Balanced smooth for the quality that guarantees sound-reducing and frequency response, various earphone products all are on loudspeaker, to improve basically, constantly on the moulding of loudspeaker and material, innovate; The sound-reducing effect of single loudspeaker earphone is progressively improved, and individual product can be realized high-fidelity.

Yet single loudspeaker earphone has natural deficiency in the parsing of different frequency audio signal; Be that single vibrating diaphragm loudspeaker are difficult to take into account the undistorted parsing of different frequency signals at synchronization; Tend to the pining down between vibration and the high bass signal amplitude of cutting apart, cause a certain frequency range sound-reducing distortion, or overall harmonic distortion strengthens because of vibrating diaphragm; Or generation is disturbed mutually between the different frequency; Make the sound muddiness of some frequency range and deviations occurs, the original directive property harmony of high-fidelity signal that can't accurately reduce is located mutually, particularly when reduction and the voice high frequency details relevant with the high pitch musical instrument, cannot say for sure that more card is accurately clear.Even adopt so-called full frequency band loudspeaker, also can only obtain minor betterment, can't fundamentally solve the problem of this type principle.

Meanwhile, being seen most Hi-Fi sound-boxes have all adopted the in addition standard of frequency division of a plurality of loudspeaker basically on the market, can guarantee the high-quality reduction of each frequency range voice signal and sound location mutually accurately to a great extent.This principle can be applied on the earphone equally; But when practical application, can run into three main difficult points: the one, a plurality of loudspeaker are not coaxial setting on most audio amplifiers; Therefore the sound of each frequency range voice signal can depart from true sound source original shape and produce distortion in the location mutually; But because audio amplifier is in very big space, to do the sound reduction, far with the distance of people's ear, this distortion can not cause the dislocation sense mutually of tangible sound.And in the earphone narrow space each frequency range loudspeaker also arranged apart like this, will make sound mutually dislocation obviously show, can't realization sound mutually accurately the location reduce with high-fidelity.The 2nd, a plurality of loudspeaker accurate location of realization sound phase easily under coaxial situation; But how each frequency range loudspeaker sorts fairly obvious to the sound directivity influence; And can a plurality of loudspeaker be integrated in the confined space of earphone with thin as far as possible gross thickness, also is to realize the coaxial key influence factor of many loudspeaker.The 3rd, can there be enough spaces to lay frequency unit in the audio amplifier, the space in the earphone case is but very limited.If place frequency unit earphone outside; Can make the product complicated integral structure; Also can be excessive because of distance between frequency unit and the loudspeaker, the distributed capacitance of lead and inductance the correct reduction of some frequency is exerted an influence and the unevenness that causes frequency response with reduce distortion.Therefore managing to be installed on frequency unit in the housing with the integrated form of frequency-dividing line, also is the essential condition that realizes the coaxial application of many loudspeaker.

[summary of the invention]

The utility model just is being based on above-mentioned this situation; To overcome the inadequate natural endowment of single loudspeaker earphone; And the frequency splitting technology of high-grade audio amplifier applied to be purpose in the earphone, with in the market single loudspeaker earphone of shiploads of merchandiseization totally be shaped to the basis, done brand-new thinking and design internally on the Mechanical Builds; High pitch, middle pitch and three loudspeaker of bass are integrated on the header board simultaneously; The basic configuration that had both kept original earphone has guaranteed the sound location and the directive property requirement mutually of three unit of senior middle school's low frequency again, and it is integrated that the while carries frequency-dividing line again; Make final products need not extra outside frequency divider is set, make earphone itself just become the Hi-Fi sound-box of a miniature type.

Be to realize above-mentioned purpose, the utility model proposes the coaxial earphone scheme of a kind of three frequency division, comprises that ear muff, header board, bonnet, loudspeaker, mediant trumpet, bass horn, built-in frequency-dividing line plate are integrated, and butt joint forms (Fig. 1) successively.

The coaxial earphone of above-mentioned three frequency division; It is characterized in that: the Front-end Design of said header board has the location hole that loudspeaker is installed; The header board back end design has the supporting walls that installs middle pitch and bass horn respectively; Three loudspeaker in the entire headset are realized axially and location radially by header board, thereby are made coaxial the laying of the real realization of three loudspeaker.See from physical characteristic; High frequency sound wave directive property is the most sharp-pointed; Sound source is answered as close as possible people's ear, and the topology layout of the utility model is placed on loudspeaker cloth from the nearest position of people's ear just, and low-frequency sound wave directive property is least obvious; Can be far away from people's ear, the intermediate frequency sound wave is then between both require.The topology layout of the utility model is passed through three loudspeaker just in the axial direction by the sequence arrangement of high pitch to bass, has guaranteed the physics requirement that different frequency audio frequency sound source directive property harmony is located mutually.

The coaxial earphone of above-mentioned three frequency division is characterized in that: said loudspeaker directly bonds on the location hole from the front end of header board, and it goes between then by going out the rear end that line groove hole causes header board, is convenient to be integrated and connected with frequency-dividing line.The supporting walls that the rear end of said header board is useful on the mediant trumpet location and isolates, mediant trumpet is adhered on this supporting walls from the header board rear end.The supporting walls that the periphery of said header board rear end mediant trumpet is useful on the bass horn location and isolates, bass horn is adhered on this supporting walls from the header board rear end, and keeps enough spacings with mediant trumpet.Said header board rear end is to being connected to bonnet; Each internal structure is encapsulated as integral body, and forms cavity, become casing with the audio amplifier same principle; The audio signal that guarantees whole frequency ranges all can obtain good acoustic enviroment, and enough acoustic pressures and sensitivity are arranged when guaranteeing the earphone restoring acoustical signal.Said header board front end is with ear muff, the comfortableness when accurate directive property when guaranteeing sound-reducing and user wear.

The coaxial earphone of above-mentioned three frequency division is characterized in that: be designed with the location hole of laying loudspeaker on the said header board and lay middle pitch and the supporting walls of bass horn, and each loudspeaker leaves penetrable sound hole separately respectively.Isolate the effect of disturbing mutually between each loudspeaker minimizing different frequency thereby this structural design plays, also avoided single loudspeaker oscillation phenomenon that single vibrating diaphragm is inevitably cut apart, guaranteed the high-fidelity requirement of each frequency band signals reduction.

The coaxial earphone of above-mentioned three frequency division; It is characterized in that: leave on the described header board and supply the line groove hole that goes out that loudspeaker and mediant trumpet line use; The connection lead-in wire of being convenient to these two loudspeaker goes out the line groove hole to pass from this; Be connected with built-in frequency-dividing line is integrated, and keep the air-tightness of the cavity of loudspeaker location hole and the formation of mediant trumpet supporting walls simultaneously.

The coaxial earphone of above-mentioned three frequency division; It is characterized in that: the outer rim of said header board rear end bass horn supporting walls is designed with and is used to lay the integrated specific location of built-in frequency-dividing line; Frequency-dividing line is integrated as built-in fixation kit; Form integral body with miscellaneous part, thereby contour structures and common single loudspeaker earphone are as good as.

Owing to adopted above scheme, brought following beneficial effect:

One, the utility model is integrated into high pitch, middle pitch and three loudspeaker of bass in the cavity; And the processing respectively through the integrated realization different frequency range of built-in frequency-dividing line signal; Thereby realized the audio signal reducing condition the same with audio amplifier; Can effectively reduce disturbing mutually and pining down between harmonic distortion and different frequency sound wave, make earphone produce the hi-fi effect the same with audio amplifier.

Two, the utility model places overall structure front end and middle part with loudspeaker and mediant trumpet in order; Make high pitch and middle pitch unit more near people's ear; Thereby the lost amplitude when helping remedying high pitch and middle pitch sonic propagation and the vulnerability of directive property aspect; Make the sound phase accurate positioning of senior middle school's audio section, and on acoustic pressure, coordinate naturally with bass unit.

Three, the utility model system is with reference to the moulded design carried out of single loudspeaker earphone of shiploads of merchandiseization in the market; Therefore integral thickness still remains in the scope of existing single loudspeaker earphone product, makes the utility model still can possess convenience and the comfortableness the same with single loudspeaker earphone in use.

[description of drawings]

Fig. 1 is the whole generalized section of the utility model.

Fig. 2 is the header board rearview of the utility model.

Fig. 3 is the utility model header board front view.

[embodiment]

Among Fig. 1, header board (1) front end is equipped with loudspeaker (8), is adhesively fixed in the loudspeaker location hole of preceding front edge of board.Mediant trumpet (6) and bass horn (5) embed respectively the interior circle of mediant trumpet supporting walls (4) and bass horn supporting walls (2) from the header board rear end, automatically bonding the and sealing and fixing in back, location.The lead-in wire of high pitch and mediant trumpet all through go out line groove hole in the past front edge of board cause the header board rear end and be integrated and connected with built-in frequency-dividing line plate.After all parts install, at last bonnet (3) is docked to header board rear end, completed assembled.

Among Fig. 2; Be used to lay mediant trumpet in the interior circle of mediant trumpet supporting walls (4); By this supporting walls mediant trumpet is done axially and automatic location radially; Bonding and sealing and fixing behind the embedding mediant trumpet, its lead-in wire is connected with frequency-dividing line is integrated after line groove hole (5) is guided to the integrated holddown groove of frequency-dividing line (2) through going out.

Among Fig. 2; Be used to lay bass horn in the interior circle of bass horn supporting walls (1); By this supporting walls bass horn is done axially and automatic location radially; Embed bonding and sealing and fixing behind the bass horn, its lead-in wire is directly guided to the integrated holddown groove of frequency-dividing line (2) in the cavity and is connected with frequency-dividing line is integrated.Loudspeaker location hole (3) then is used for the past front edge of board and lays loudspeaker.

Among Fig. 2, it is integrated to lay frequency-dividing line in the integrated holddown groove of frequency-dividing line (2), sticks with glue after packing into and connects the location.

Among Fig. 3, loudspeaker location hole (4) is in order to the device loudspeaker, and in the past front edge of board embeds behind the loudspeaker to stick with glue along the loudspeaker circumferential edges and connects the location and realize sealing.The lead-in wire of loudspeaker passes from lead-in wire slotted eye (1), and the integrated place of frequency-dividing line that guides to the header board rear end connects.

Among Fig. 3, bass horn penetrable sound hole (2), mediant trumpet penetrable sound hole (3) and loudspeaker penetrable sound hole (5) all are used to guarantee each loudspeaker normal conduction acoustic signals separately under non-interfering condition.

In the embodiment in figure 1,7 is ear muff, after the entire infrastructure butt joint is accomplished, this ear muff is set on the header board front end face along the header board outer rim, accomplishes moulded.

Claims

1. coaxial earphone of three frequency division; It is characterized in that: comprise header board, bonnet, bass horn, mediant trumpet, loudspeaker, integrated, the ear muff of built-in frequency-dividing line plate; Said front end ear muff, header board, loudspeaker, mediant trumpet, bass horn, built-in frequency-dividing line is integrated and bonnet is affixed successively; Said loudspeaker is bonded in the loudspeaker location hole of header board; Said mediant trumpet is bonded in the interior circle of mediant trumpet supporting walls, and said bass horn is bonded in the interior circle of bass horn supporting walls, and the loudspeaker of said three axially-aligned are made radial and axial accurate location automatically by front board structure.

2. the coaxial earphone of three frequency division as claimed in claim 1; It is characterized in that: it is integrated that said earphone carries built-in frequency-dividing line plate, is positioned at bass horn supporting walls outer rim, is adhesively fixed; And be connected respectively with three loudspeaker and outer lead, become the fixation kit in the earphone integral body.

3. the coaxial earphone of three frequency division as claimed in claim 1; It is characterized in that: the loudspeaker that installs on the said header board, mediant trumpet and bass horn; Press close to most people's ear with loudspeaker; Secondly mediant trumpet, bass horn is from people's ear layout farthest, naturally the directive property harmony of the different audio frequencies of the realization accuracy of locating mutually.

4. the coaxial earphone of three frequency division as claimed in claim 2 is characterized in that: leave the line groove hole that of mediant trumpet and loudspeaker on the described header board, be convenient to loudspeaker and mediant trumpet and built-in frequency-dividing line integrated be connected and keep the air-tightness of cavity separately.

5. like claim 1 or the coaxial earphone of 3 or 4 described three frequency divisions, it is characterized in that: be designed with three loudspeaker penetrable sound hole separately on the said header board, and isolate, disturb to reduce by three sound waves between the loudspeaker with separately supporting walls and location hole.