CN102572639A

CN102572639A - Mirror image vibration type loudspeaker box

Info

Publication number: CN102572639A
Application number: CN2011104587938A
Authority: CN
Inventors: 李世煌
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-31
Filing date: 2011-12-31
Publication date: 2012-07-11

Abstract

The invention discloses a mirror image vibration type loudspeaker box, which is characterized by comprising a sealed loudspeaker box body which is provided with an output unit. The output unit comprises at least one cone hole, at least one diaphragm hole, a loud speaker unit and a passive radiation unit. The loudspeaker unit is loaded on the cone hole to be sealed. The passive radiation unit is provided with a passive diaphragm and loaded on the diaphragm hole to be sealed. The vibration direction of the loudspeaker unit is identical with the vibration direction of the passive diaphragm of the passive radiation unit. The mirror image vibration type loudspeaker box further comprises a mirror image unit which is in mirror symmetry with the output unit and the loudspeaker unit and the passive radiation unit which are positioned on the output unit in the reversed direction of the vibration direction. The cone and the passive diaphragm of the loudspeaker unit vibrate in mirror image mode with the same direction and equivalence. The left and right immediate momentums of the loudspeaker box body are balanced; sound coloration, which is caused by a lot of extra unrelated harmonic waves generated by the vibration of the loudspeaker box body, is avoided; and the purpose of small volume and excellent sound effect of the loudspeaker is achieved.

Description

Mirror image oscillatory type audio amplifier

Technical field

The present invention relates to a kind of audio amplifier with mirror image vibration performance.

Background technology

Audio amplifier has in portable electro-acoustic conversion device widely to be used, and its requirement is with little volume, audio electrical signal is converted into audio frequency is loyal to former sound output.According to the characteristics of existing general magnetic speaker audio amplifier, its performance and volume are the factors of a pair of mutual restriction, when its volume more and more hour, the performance of sound-reducing seems worse and worse especially in the medium and low frequency section; If install phase-reversing tube, labyrinth or horn additional according to traditional approach, its performance improvement is very limited, simultaneously inevitably, can strengthen the volume of sound box bodies, makes its internal structure complicated.On the other hand; When magnetic speaker on the sound box bodies or passive type vibrating diaphragm vibrate under macro-energy; Can make audio amplifier have reverse momentum inevitably, make casing that violent vibration take place, make the casing mass part that unwanted resonance take place and make voice output be colored distortion; Based on this, do sound box bodies solid and heavy, be the effective scheme that addresses this problem, but directly conflict with its portability.

Summary of the invention

To above portable sound box sound coloration and the medium and low frequency problem of original error also, the present invention proposes a kind of mirror image oscillatory type audio amplifier, its technical scheme is following:

Mirror image oscillatory type audio amplifier, it comprises a sound box bodies of sealing, has an output unit on this sound box bodies, comprises on this output unit:

At least each a sound basin hole and vibrating diaphragm hole;

Loudspeaker unit loads on said sound basin hole and keeps sealing; And

The passive radiation unit has the passive type vibrating diaphragm, loads on said vibrating diaphragm hole and keeps sealing;

Wherein the direction of vibration of loudspeaker unit is identical with the passive type vibrating diaphragm direction of vibration of said passive radiation unit; Other has a mirror image unit, comprises loudspeaker unit, passive radiation unit mirror image symmetry on it the reverse of said direction of vibration and said output unit.

As the preferred person of present technique scheme, can aspect as follows, have improvement:

In one preferred embodiment, said sound basin hole and vibrating diaphragm hole are tiled in an installed surface of said output unit; Further, two kinds of improvement can be arranged: in the preferred embodiment, the spacing of said installed surface is less than said loudspeaker unit sound basin diameter; In another preferred embodiment, said loudspeaker unit and passive radiation unit cover said installed surface.

In one preferred embodiment, effective sound pelvic surface of sacrum that its effective area of passive type vibrating diaphragm on the said output unit is not less than said loudspeaker unit amasss.

Have on the installed surface scheme basis in the preferred embodiment, said loudspeaker unit periphery or passive radiation unit periphery have the reference column between the fastening said installed surface.

In one preferred embodiment, said loudspeaker unit is positioned at said sound box bodies, and the mode that the back loads loads on said sound basin hole.

Loudspeaker unit is positioned at outside the said sound box bodies described in one preferred embodiment, and preceding load mode loads on said sound basin hole.

The beneficial effect that the present invention brings is:

1. loudspeaker unit and its mirror image person are under same audio-signal-driven; Its sound basin vibrates with the mirror image mode of equivalent in the same way; Simultaneously the passive type vibrating diaphragm also can vibrate with the mirror image mode of equivalent in the same way, thereby the instant momentum balance about whole sound box bodies, even under the high-power driving; The high vibration of passive type vibrating diaphragm also can about direction of mirror image obtain offsetting, to such an extent as to avoid the vibration of sound box bodies to bring extra a large amount of irrelevant harmonic wave sound colorations.

2. two-sided speaking, comprehensive radiation has " true audio " of simulating reality source of sound, helps realizing the audio amplifier of slim advantages of small volume simultaneously, and the modularization form of a plurality of cascades.

3. the form of sealed type sound box bodies band passive type vibrating diaphragm helps sound-reducing, and especially, slim sound box bodies helps improving the load of loudspeaker unit, highly in the reduction, the voice signal of low frequency.

4. the tiling of loudspeaker unit and passive radiation unit is covered with installed surface, helps utilizing substantially the sound box bodies surface.

5. add the structure of reference column, improved the intensity of sound equipment body, to such an extent as to further avoided the outer vibration sound coloration of sound box bodies amount.

Description of drawings

Embodiment is described further the present invention below in conjunction with accompanying drawing:

Fig. 1 is the generalized section of the embodiment of the invention one;

Fig. 2 is the left view of Fig. 1 embodiment;

Fig. 3 is the embodiment of the invention two cutaway views;

Fig. 4 is Fig. 3 embodiment left view;

Fig. 5 is the embodiment of the invention three cutaway views;

Fig. 6 is the embodiment of the invention four cutaway views;

Fig. 7 is Fig. 6 embodiment left view.

Embodiment

Embodiment one:

Like Fig. 1 is the generalized section of the embodiment of the invention one; Fig. 2 is the left view of Fig. 1 embodiment; Explain in conjunction with this two figure:

Sound box bodies 1 is the casing of a symmetrical hexahedron form, and its left side has an output unit 10, comprises the installed surface 13 of a flat board on this output unit, and installed surface 13 has a sound basin hole 11 and a vibrating diaphragm hole 12.One loudspeaker unit 21 is positioned at sound box bodies 1, and the mode that adopts the back to load loads on said sound basin hole 11; One passive radiation unit 22 loads on vibrating diaphragm hole 12; And loudspeaker unit 21 keeps sealing with passive radiation unit 22 and installed surface.Therefore sound box bodies 1 is in sealing state.Have passive type vibrating diaphragm 23 on the passive radiation unit 22, when loud speaker 21 receives to drive vibration, resonance will take place in passive type vibrating diaphragm 23 under the driving of cabinet space 2 air.

The direction of vibration of loudspeaker unit 21 its sound basins is identical with passive type vibrating diaphragm 23 direction of vibration of passive radiation unit 22, i.e. the horizontal arrow of paper among Fig. 1; Other has a mirror image unit 10 ', comprises loudspeaker unit 21, passive radiation unit 22 mirror images symmetry on it at the reverse output unit 10 of said direction of vibration.So; Under this structure, loudspeaker unit 21 is used same audio-signal-driven simultaneously with its mirror image person 21 ', and

loudspeaker unit

21 and 21 ' its sound basin are vibrated with the mirror image mode of equivalent in the same way; Simultaneously passive type vibrating diaphragm 23 and 23 ' also can vibrate with the mirror image mode of equivalent in the same way; Thereby the instant momentum balance of whole sound box bodies about 1, even under the high-power driving, passive type vibrating diaphragm 23; 23 ' high vibration also can about direction of mirror image obtain offsetting, to such an extent as to avoid the vibration of sound box bodies 1 to bring extra a large amount of irrelevant harmonic wave sound colorations; Simultaneously, passive type vibrating diaphragm 23 and 23 ' all design with

loudspeaker unit

21,21 ' resonance in certain low-frequency range, make the sound of whole sound box bodies 1 output obtain good output in the same way, and the acoustic short circuit phenomenon can not take place.Therefore, on the one hand, avoid sound box bodies to vibrate the sound coloration that brings, ensured the middle bass reducing power of whole audio amplifier on the other hand.

Embodiment two:

Fig. 3 is the embodiment of the invention two cutaway views; Fig. 4 is Fig. 3 embodiment left view; Explain in conjunction with this two figure:

Loudspeaker unit

21 and 21 ', passive radiation unit 22 are similar with embodiment one with 22 ' mirror image mode; Different is; Loudspeaker

unit

21 and 21 ' diameter D are than the thickness H of sound box bodies 1 in this example, and promptly the spacing between the installed surface is big, so; The load of loudspeaker unit sound basin is just bigger, and the tonequality that obtains further improves; Especially; Because the thickness of H can be done smallerly, this sound box bodies 1 can become very thin, almost only is that the double thickness of loudspeaker unit gets final product; So can be useful on electrophonic musical instrument, the flat-panel devices; The passive type vibrating diaphragm 23 on its two sides and 23 ' can two-sidedly be spoken, comprehensive radiation, " the true audio " of analog instruments and other sound generation source; This is the not available advantage of single face audio amplifier, and effective sound pelvic surface of sacrum that while passive type vibrating diaphragm 23 and 23 ' its effective area are not less than said

loudspeaker unit

21 and 21 ' amasss., the load that this has further improved loudspeaker cone promotes the effect that its bass reduces.

On the other hand, the form of this sound box bodies 1 realizes the modularization effect of a plurality of combinations and cascade as required easily, can select different loudspeaker units and passive type vibrating diaphragm for use to different frequency range, reaches abundant and complete sound reduction effect.

Embodiment three:

Like Fig. 5, the embodiment of the invention three cutaway views; The sound box bodies 1 of this embodiment is similar with embodiment two, and different is, its thickness can be less than the double thickness of

loudspeaker unit

21 and 21 ', and the further volume in the compression box body space 2.The

loudspeaker unit

21 and 21 ' of this scheme has adopted the mode of preceding loading to be fixed on the sound box bodies 1, and the body of loud speaker is positioned at outside the sound box bodies 1.Can consider this scheme at some thickness and occasions with limited thereof, get final product and its

unit

21 and 21 ' of will raising one's voice suitably is shielded in other not limited positions.This scheme has promptly realized the thinnest scheme, because the thickness of sound box bodies 1 is no longer limit by any inner member.

Embodiment four:

Like Fig. 6 is the embodiment of the invention four cutaway views; Fig. 7 is Fig. 6 embodiment left view.Give illustrative embodiment four in conjunction with this two figure:

The mode that the

loudspeaker unit

21 and 21 ' of present embodiment still adopts the back to load; Passive radiation unit 22 and 22 ' then has two separately; Tiling is respectively in the both sides of

loudspeaker unit

21 and 21 ' on single installed surface, thus

loudspeaker unit

21 and 21 ' and passive radiation unit 22 and 22 ' almost be covered with the whole erection face, like this; The outer surface of whole sound box bodies 1 gets the maximum use.

In

loudspeaker unit

21 and 21 ' periphery; Has the reference column 9 between the fastening installed surface 13; This reference column has been reinforced the intensity of whole sound box bodies 1 on the one hand, to such an extent as to also avoid installed surface 13 that excessive extra vibration takes place on the other hand effectively voice output is caused sound coloration, so combines to make the thin sound box bodies 1 of small size to have very big advantage: to can be applicable to the harsh field of volume; But do not have unnecessary vibration, highly reduced former sound.

The above is merely preferred embodiment of the present invention, so can not limit the scope that the present invention implements according to this, the equivalence of promptly doing according to claim of the present invention and description changes and modifies, and all should still belong in the scope that the present invention contains.

Claims

1. mirror image oscillatory type audio amplifier, it is characterized in that: it comprises a sound box bodies of sealing, has an output unit on this sound box bodies, comprises on this output unit:

At least each a sound basin hole and vibrating diaphragm hole;

Loudspeaker unit loads on said sound basin hole and keeps sealing; And

2. according to the said mirror image oscillatory type of claim 1 audio amplifier, it is characterized in that: said sound basin hole and vibrating diaphragm hole are tiled in an installed surface of said output unit.

3. according to the said mirror image oscillatory type of claim 1 audio amplifier, it is characterized in that: effective sound pelvic surface of sacrum that its effective area of passive type vibrating diaphragm on the said output unit is not less than said loudspeaker unit amasss.

4. according to the said mirror image oscillatory type of claim 2 audio amplifier, it is characterized in that: the spacing of said installed surface is less than said loudspeaker unit sound basin diameter.

5. according to the said mirror image oscillatory type of claim 4 audio amplifier, it is characterized in that: in said sound box bodies, said loudspeaker unit periphery or passive radiation unit periphery have the reference column between the fastening said installed surface.

6. according to the said mirror image oscillatory type of claim 1 audio amplifier, it is characterized in that: said loudspeaker unit is positioned at said sound box bodies, and the mode that the back loads loads on said sound basin hole.

7. according to the said mirror image oscillatory type of claim 1 audio amplifier, it is characterized in that: said loudspeaker unit is positioned at outside the said sound box bodies, and preceding load mode loads on said sound basin hole.

8. according to the said mirror image oscillatory type of claim 2 audio amplifier, it is characterized in that: said loudspeaker unit and passive radiation unit cover said installed surface.