CN101754075A - Improved structure of loudspeaker - Google Patents

Abstract

The invention discloses an improved structure of a loudspeaker, which comprises a frame, a dangling edge and a vibrating diaphragm, wherein the periphery of the vibrating diaphragm is sealed on the edge of the opening of the frame, and the inner side of the frame is provided with an accommodating area, whereas the dangling edge is arranged between the vibrating diaphragm and the accommodating area of the frame; therefore, when a sound current signal is input to a voice coil in the frame, the voice coil outputs an audio frequency signal and drives the vibrating diaphragm to generate vibration, and then a sound is made. The invention can enable the vibrating diaphragm to be more smooth in vibrating up and down and can lower distortion rate by the design of the dangling edge, and therefore, compared with the traditional structure, the vibration have less resistance.

Description

Improved structure of loudspeaker

Technical field

The present invention relates to a kind of improved structure of loudspeaker.

Background technology

The loud speaker operating principle is to come bright left hand rule according to Buddhist, to place magnetic field by the voice coil loudspeaker voice coil (Voice Coil) of electric current, because of being subjected to its active force to produce motion, and then drive oscillating plate and promote air and sound, thereby electric signal is converted to mechanical energy promote the electro-acoustic element that air is sounded for a kind of; Que Qie Di Said is that the audio-frequency electric power signal in the certain limit is changed into distortion by the transducing mode is little and have a sub-audible sound of enough acoustic pressures on the reality of work of loud speaker;

And the loud speaker that is generally generally used is coil-moving speaker, constitute and this coil-moving speaker is by magnetic loop module (permanent magnet, stem stem, magnetic conductive board), vibration module (cone, voice coil loudspeaker voice coil) and support auxiliary module three major parts such as (centring disk, basin frame, pad limits), wherein this voice coil loudspeaker voice coil directly and vibrating diaphragm be fixed together, after the acoustic current-meter signal feeds voice coil loudspeaker voice coil, the cylindrical shape coil that is in the winding in the permanent magnetic field links to each other with vibrating diaphragm, coil is under signal code drives, voice coil loudspeaker voice coil produces vibration, and driving vibrating diaphragm generation vibration, and then sound;

And coil-moving speaker and the general very big different differences that are vibrating diaphragm of loud speaker, the vibrating diaphragm edge of loud speaker generally is fixed on elastic fluid (ring and centring disk) and goes up (for example on the heavy caliber bass unit), vibrating diaphragm generally is smooth taper shape, and the vibration of vibrational system is provided by elastic fluid; By Figure 1A and Figure 1B as can be known, in coil-moving speaker, vibrating diaphragm 1 edge directly is fixed on the framework of driver element, vibrating diaphragm 1 has laterally outstanding limit 2, vibrational system is provided by the distortion on the stretching, extension of vibrating diaphragm 1 material own and contraction and outstanding limit 2 fully, selection of the material of moving-coil type driver element vibrating diaphragm 1 and shaped design are very big to the final voice quality influence in unit thus, therefore the outstanding limit 2 on the vibrating diaphragm 1 is when up-down vibration, partly the vibration meeting produces offseting phenomenon because of fold, and cause and complete sound can't be sent, cause the generation of distortion rate.

Summary of the invention

The object of the present invention is to provide a kind of improved structure of loudspeaker, can provide a kind of when voice coil loudspeaker voice coil produces vibration, make its up-down vibration can be more smooth and easy and lower distortion rate, and can be than traditional structure non-resistance more.

For realizing above purpose, utility model of the present invention has been taked following technical scheme: a kind of improved structure of loudspeaker, formed by basin frame and vibration module; Wherein this vibration module engages with the basin frame, and this vibration module has comprised outstanding limit and vibrating diaphragm, wherein this vibrating diaphragm periphery involution is in this basin frame edge of opening place, and the inboard place of this basin frame opening is provided with the disposal area, and should be vertically connected between vibrating diaphragm and the basin frame disposal area on outstanding limit; Therefore after the acoustic current-meter signal feeds the voice coil loudspeaker voice coil of basin frame inside, voice coil loudspeaker voice coil produces vibration, and driving vibrating diaphragm and producing vibration, and then sound, and when voice coil loudspeaker voice coil produces vibration, can make this vibrating diaphragm up-down vibration more smooth and easy and lower distortion rate by outstanding limit, make this vibration than traditional structure non-resistance more.

The present invention compared with prior art has following advantage:

1. improved structure of loudspeaker of the present invention wherein should outstanding limit be provided with the position and can makes up-down vibration more smooth and easy and lower distortion rate, and its vibration is than traditional structure non-resistance more.

2. improved structure of loudspeaker of the present invention can be ignored the quality on outstanding limit, and can reach descant and press efficient under unidimensional restriction.

Description of drawings

Figure 1A is the part exploded view of existing loud speaker;

Figure 1B is the stereogram of existing loud speaker;

Fig. 1 C is the profile of existing loud speaker;

Fig. 2 A is the part exploded view of improved structure of loudspeaker of the present invention;

Fig. 2 B is the stereogram of improved structure of loudspeaker of the present invention;

Fig. 2 C is the profile of improved structure of loudspeaker of the present invention; And

Fig. 3 is the embodiment profile of improved structure of loudspeaker of the present invention;

Description of reference numerals: 1, vibrating diaphragm, 2, outstanding limit, 3, loudspeaker monomer, 4, the basin frame, 41, the disposal area, 411, support division, 51, outstanding limit, 52, vibrating diaphragm.

Embodiment

Below in conjunction with the drawings and specific embodiments content of the present invention is described in further details.

Embodiment:

See also Fig. 2 A, Fig. 2 B and Fig. 2 C, be part exploded view, stereogram and the profile of improved structure of loudspeaker of the present invention, by among the figure as can be known, this loudspeaker monomer 3 comprises at least:

Basin frame 4, the inboard place of these basin frame 4 openings is provided with disposal area 41, and the L type annulus that this disposal area 41 concaves for opening has support division 411 in addition in this disposal area 41;

Outstanding limit 51 is will hang limit 51 1 ends in the bonding mode to be fixed in vibrating diaphragm 52 peripheries, and the other end then is fixed on the basin frame support division 411;

Vibrating diaphragm 52, after wherein binded on these vibrating diaphragm 52 peripheries and outstanding limit 51, involution was in these basin frame 4 edge of opening places again;

Feed the voice coil loudspeaker voice coil of basin frame 4 inside when the acoustic current-meter signal after, voice coil loudspeaker voice coil produces vibration, and drive vibrating diaphragm 52 produces vibration, and then sound, and when voice coil loudspeaker voice coil produces vibration, can make these vibrating diaphragm 52 up-down vibration more smooth and easy and lower distortion rate by outstanding limit 51, make this vibration than traditional structure non-resistance more.

See also Fig. 3, be the embodiment profile of improved structure of loudspeaker of the present invention, the present invention adopts electrical conductor to make voice coil loudspeaker voice coil, and when importing a tone currents signal in the voice coil loudspeaker voice coil, voice coil loudspeaker voice coil is equivalent to a current; If it is placed in the fixed magnetic field, in magnetic field, can be subjected to the principle of the effect campaign of power according to current, voice coil loudspeaker voice coil can be subjected to the power that a size is directly proportional with tone currents, direction changes with tone currents; So voice coil loudspeaker voice coil will produce vibration under the action of a magnetic field, and drives vibrating diaphragm and vibrate in the lump, and the air before and after the vibrating diaphragm also vibrates thereupon, so just converts the electrical signal to sound wave to radiation all around;

By among Fig. 3 as can be known, when voice coil loudspeaker voice coil produces vibration, can make this vibrating diaphragm produce vibration up and down by outstanding limit, and can produce up-down vibration height R, existing loud speaker in Fig. 1 C, when voice coil loudspeaker voice coil produces vibration, outstanding limit makes this vibrating diaphragm produce vibration up and down, because of outstanding limit is provided with the position on the plane of vibrating diaphragm left and right sides, therefore its Oscillation Amplitude is an angle θ, and its Oscillation Amplitude not only has very big restriction, has resistance when also making the vibrating diaphragm up-down vibration, and cause and complete sound can't be sent, cause the generation of distortion rate;

The present invention obtains maximum effective vibration area (Sd) for restriction basin frame size in addition, and bringing into play maximum sound press efficient, and actual operational formula is:

$V_{\mathrm{as}}=\frac{355\×{\left(\frac{S_d}{\mathrm{\π}}\right)}^2}{F_s^2\×M_{\mathrm{ms}}}$

$C_{\mathrm{ms}}=\frac{1}{{(2\mathrm{\π}\×F_s)}^2\×M_{\mathrm{ms}}}$

$Q_{\mathrm{es}}=\frac{2\mathrm{\π}\×F_s\×M_{\mathrm{ms}}\×R_e}{{\left(\mathrm{BL}\right)}^2}$

${\mathrm{\η}}_0=\frac{9.64\×{10}^{-10}\×F_s^3\×V_{\mathrm{as}}}{Q_{\mathrm{es}}}=\frac{9.64\×{10}^{-10}\×F_s^3\×\frac{355\×{\left(\frac{S_d}{\mathrm{\π}}\right)}^2}{F_s^2\×M_{\mathrm{ms}}}}{Q_{\mathrm{es}}}$

$=\frac{9.64\&times;{10}^{-10}\&times;355\&times;F_s\&times;{\left(\frac{S_d}{\mathrm{\&pi;}}\right)}^2}{Q_{\mathrm{es}}\&times;M_{\mathrm{ms}}}=\frac{9.64\&times;{10}^{-10}\&times;355\&times;F_s\&times;{\left(\frac{S_d}{\mathrm{\&pi;}}\right)}^2\&times;{\left(\mathrm{BL}\right)}^2}{2\mathrm{\&pi;}\&times;F_s\&times;{{\mathrm{<figure-callout\; id="2"\; label="M\; ms"\; filenames="H2008101860315E0000012.png"\; state="\{\{state\}\}">M</figure-callout>}}_{\mathrm{ms}}}^2\&times;R_e}$

$=5.51856\&times;{10}^{-9}\&times;\left(\frac{{\mathrm{<figure-callout\; id="2"\; label="S\; d"\; filenames="H2008101860315E0000012.png"\; state="\{\{state\}\}">S</figure-callout>}}_d^{}\&times;{\left(\mathrm{BL}\right)}^2}{{{\mathrm{<figure-callout\; id="2"\; label="M\; ms"\; filenames="H2008101860315E0000012.png"\; state="\{\{state\}\}">M</figure-callout>}}_{\mathrm{ms}}}^2\&times;R_e}\right)=\frac{5.51856\&times;{10}^{-9}}{R_e}\&times;{\left(\frac{S_d\&times;\mathrm{BL}}{M_{\mathrm{ms}}}\right)}^2$

Wherein this Vas is that equivalent air area (Equivalent air volume of the speaker), Sd are for effectively vibration area (Effective moving area), Cms are that suspension system compliance (Compliance of the suspension system), Qes are electrical damping coefficient (ElectricDamping Factor), η ₀For monomer efficient, Re are that voice coil loudspeaker voice coil D.C. resistance, BL are that the thrust factor (Force Factor) of magnetic circuit and the generation of voice coil loudspeaker voice coil line length, effective oscillating mass (Movingmass of the speaker, including the air load), the Msurround that Mms is monomer oscillatory type are that voice coil loudspeaker voice coil quality (voice coil mass), Mbond are that glue quality (Bond massfor the moving part), Fs are monomer low-frequency resonant frequency (Resonance) for quality (Surrmass), the Mvc on outstanding limit; The Mms of conventional loudspeakers (effective oscillating mass of monomer oscillatory type) in addition, its formula is:

$M_{\mathrm{ms}}=M_{\mathrm{cone}+\mathrm{cap}}+\frac{M_{\mathrm{surround}}}{2~3}+M_{\mathrm{Vc}}+M_{\mathrm{Bond}}$

And Mms of the present invention (effective oscillating mass of monomer oscillatory type), its formula is:

M _ms＝M _cone+cap+M _vc+M _Bond

Therefore the present invention can ignore the quality (Msurround) on outstanding limit, and can be under unidimensional restriction, reaches effective oscillating mass of high monomer oscillatory type.

Above-listed detailed description is at the specifying of possible embodiments of the present invention, and this embodiment is not in order to limiting claim of the present invention, and the equivalence that all the present invention of disengaging do is implemented or change, all should be contained in the claim of this case.

Claims (4)

1. an improved structure of loudspeaker comprises loudspeaker monomer, wherein comprises vibrating diaphragm, basin frame and outstanding limit at least; It is characterized in that: this outstanding limit is arranged between vibrating diaphragm and the basin frame, and wherein this vibrating diaphragm periphery involution is located to be provided with the disposal area and this basin frame edge of opening is inboard, and should be fixed within the disposal area on outstanding limit in this basin frame edge of opening place.

2. improved structure of loudspeaker as claimed in claim 1 is characterized in that: described basin frame disposal area is arranged with by the edge of opening inboard, to form the annulus of L type.

3. improved structure of loudspeaker as claimed in claim 1 is characterized in that: described outstanding limit is fixed between vibrating diaphragm periphery and the basin frame support division.

4. improved structure of loudspeaker as claimed in claim 3 is characterized in that: described outstanding limit is fixed between vibrating diaphragm and the basin frame in the bonding mode.

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