CN200969613Y - Passive handset megaphone - Google Patents

Abstract

A passive device for sound amplification of the mobile phone is composed of an index type tube and a connecting device. The index type tube is provided with two openings: one end is provided with a small opening, namely throat, and the other end is provided with a big opening, namely horn mouth. The throat is connected with a position making bell sounds on a mobile phone by the connecting device. When the ingenious passive device provided by the utility model for sound amplification of the mobile phone is in use on a mobile phone, the volume can be increased by more than ten decibel and the sound amplification effect is realized without increasing the electricity consume of the mobile phone. The utility model is very convenient to carry and use without changing its original appearance design.

Description

A kind of passive type mobile phone public address set

Technical field

The utility model relates to the mobile phone technical field, particularly relates to a kind of passive type mobile phone public address set.

Background technology

Mobile phone is as a kind of instrument that is convenient for people to communicate by letter, become necessity indispensable in the daily life, especially since nineteen nineties, mobile phone technique has been obtained tremendous development, the function of mobile phone also comes to enrich more, for example MP3, MP4, DV, DC or even TV etc.

These functions of mobile phone are being enriched constantly, and the sound of mobile phone does not but have and can improve thereupon, and the user often reflects that mobile phone sound rings inadequately, especially under noisy environment.Reason is: the first, cell-phone function is more and more, and the module that needs also increases, and space limited on the mobile phone is carved up more and more forr a short time, has determined can not select big loud speaker for use on the mobile phone; The second, owing to the restriction of sounding principle, mobile phone can not be made greatly of sensitivity, the power of loud speaker, has determined that the ringtone volume of mobile phone is big inadequately.

Summary of the invention

The purpose of this utility model is to provide a kind of device that can amplify, and is external on the mobile phone of selecting common mobile phone speaker for use with voice emplifying.

A kind of passive type mobile phone public address set that the utility model provides comprises exponential type horn and jockey, and above-mentioned exponential type horn has two openings, and an end is little opening, i.e. throat, and the other end is big opening, i.e. the horn mouth; Above-mentioned throat links to each other by the line position that goes out of bell sound on above-mentioned jockey and the mobile phone.

The shape of cross section area change rule at the above-mentioned x of the throat rice of above-mentioned exponential type horn distance is S (x)=S ₀e ^{δ x}, S wherein ₀Be above-mentioned exponential type horn throat shape area, S (x) is the above-mentioned exponential type horn shape of cross section area at the above-mentioned x of the throat rice of distance, and δ is a parameter of the above-mentioned exponential type horn cross sectional shape area change speed of decision, the index that promptly wriggles,

Above-mentioned sinuous index δ=4 π f _c/ c ₀, c wherein ₀Be THE VELOCITY OF SOUND IN AIR, f _cBe the cut-off frequency of above-mentioned exponential type horn, $f_c=\frac{1}{\sqrt{2}}{\mathrm{<figure-callout\; id="1"\; label="f\; l"\; filenames="Y20062015777100081.png,Y20062015777100091.png"\; state="\{\{state\}\}">f</figure-callout>}}_l,$ F wherein _L1For having cut-off frequency f ₁The mobile phone electro-acoustic element actual cut-off frequency of packing into and uprising behind the handset structure.

Above-mentioned exponential type horn throat shape area $S_0=\frac{{\mathrm{\&rho;}}_0{c}_0{S}_D^2\&CenterDot;R_E}{{\left(\mathrm{Bl}\right)}^2},$ ρ wherein ₀Be atmospheric density, Bl is the electromechanical coupling factor of mobile phone speaker, R _EBe the direct current resistance of mobile phone speaker, S _DEffective radiating area for mobile phone speaker.

The horn degree of lip-rounding shape area S of above-mentioned exponential type horn _lBy nozzle radius a _lDetermine, satisfy 2 π f _ca _l/ c ₀＞3.

Above-mentioned exponential type horn length $l=\frac{1}{\mathrm{\&delta;}}\ln \frac{\mathrm{Sl}}{S_0}.$

Above-mentioned jockey at least can be in bonding, sucker, buckle, the screw any.

Above-mentioned adhering device can comprise soft foam and the release liners with two-sided gum, and the one side that above-mentioned soft foam viscosity is strong closely links to each other with the frame that above-mentioned throat grows, and the weak slightly one side of above-mentioned soft foam viscosity links to each other with release liners.

The passive type mobile phone public address set of the ingenious design of the utility model when using on mobile phone, can improve volume more than 10 decibels in the power consumption that does not increase mobile phone, realizes amplifying effect; The utility model does not change the original appearance design of mobile phone simultaneously, and use is carried all very convenient.

Below in conjunction with accompanying drawing, concrete enforcement of the present utility model is described in further detail.For those skilled in the art that, from the detailed description to the utility model method, above-mentioned and other purposes of the present utility model, feature and advantage will be apparent.

Description of drawings

Fig. 1 is the schematic diagram of the exponential type horn part of the utility model one preferred embodiment.

Fig. 2 is the part and use schematic diagram of the utility model one preferred embodiment.

Fig. 3 is the effect contrast figure of the utility model one preferred embodiment.

Embodiment

One preferred embodiment is further described to the utility model below in conjunction with accompanying drawing.Please refer to Fig. 2, this figure is the part and use schematic diagram of the utility model one preferred embodiment.The passive type mobile phone public address set of the utility model one preferred embodiment comprise exponential type horn 1 with below will describe in detail, as the soft foam 2 and the release liners 3 of the two-sided gum of jockey.Above-mentioned exponential type horn 1 has two openings, and an end is little opening, and promptly throat 8, and the other end is big opening, and promptly the horn mouth 4; Above-mentioned throat 8 links to each other by the line position that goes out of bell sound on jockey 2 and the mobile phone, makes sound can all enter into the throat 8 of horn, comes out to realize amplification from horn mouth 4 at last.

Below with reference to Fig. 1, the design of the exponential type horn of the utility model one preferred embodiment part is described in detail.Can know that from Fig. 1 above-mentioned exponential type horn shape of cross section area change rule is S (x)=S ₀e ^{δ x}, S wherein ₀Be above-mentioned exponential type horn throat shape area, S (x) is the shape of cross section area at the above-mentioned x of the throat rice of above-mentioned exponential type horn distance, and δ is a parameter of the above-mentioned exponential type horn cross sectional shape area change speed of decision, and index promptly wriggles.

Theory analysis shows that there is a cut-off frequency f in above-mentioned exponential type horn _c, the cut-off frequency of this exponential type horn is only to greater than this cut-off frequency f _cSound wave amplification is just arranged.

f _c＝δc ₀/4π

C wherein ₀Be THE VELOCITY OF SOUND IN AIR, δ is more little, and the cross sectional shape area change is slow more, needs to do this exponential type horn big more corresponding f _cLow more.

The loud speaker of above-mentioned mobile phone playback bell sound can analogize to a high pass filter, and there is a cut-off frequency f in it _l, the sound that is lower than this frequency more can not be reset out more, and to being higher than the sound of this frequency, often play capability is the same.And because the restriction in space, after this loud speaker was packed in the handset structure, this cut-off frequency often will uprise to f _L1For avoid with the exponential type horn do too big, can be with reference to f _L1The cut-off frequency of the exponential type horn that designs.

Suppose f _L1(generally about 1500Hz) determines that the cut-off frequency that can design the exponential type horn so is $f_c=\frac{1}{\sqrt{2}}{\mathrm{<figure-callout\; id="1"\; label="f\; l"\; filenames="Y20062015777100081.png,Y20062015777100091.png"\; state="\{\{state\}\}">f</figure-callout>}}_l,$ Can further determine the sinuous index of exponential type horn in view of the above

δ＝4πf _c/c ₀

Design the above-mentioned exponential type horn shape area S of throat ₀Need consider the effective radiating area of mobile phone with loud speaker, both can be not too big, in can when being applied to mobile phone, being included in the area portions of speaking on the mobile phone again.Have a simple computing formula can be used for instructing design:

$S_0=\frac{{\mathrm{\&rho;}}_0{c}_0{S}_D^2\&CenterDot;R_E}{{\left(\mathrm{Bl}\right)}^2}$

ρ wherein ₀Be atmospheric density, Bl is the electromechanical coupling factor of mobile phone speaker, R _EBe the direct current resistance of mobile phone speaker, S _DEffective radiating area for mobile phone speaker.

When designing the area Sl of above-mentioned exponential type horn degree of lip-rounding shape, establishing exponential type horn port radius is a _l, to make the public address effect of this exponential type horn obvious in theory, satisfy 2 π f _ca _l/ c ₀＞3, if design, can design the area S of exponential type horn degree of lip-rounding shape to equal 3 _l

Exponential type horn length l can be by formula $l=\frac{1}{\mathrm{\&delta;}}\ln \frac{S_l}{S_0}$ Determine, so far finished the design of exponential type horn.If last size is too big, the shape area S of exponential type horn throat can not changed ₀Under the situation of sinuous index δ, suitably shorten exponential type horn length l and reduce size.

Continuation is with reference to Fig. 2, the bell sound goes out the jockey that the line position links to each other and can have multiple mode to realize on wherein above-mentioned throat and the above-mentioned mobile phone, as bonding, sucker, buckle, spiral etc., also comprise other jockeys that the person of ordinary skill in the field knows.Can be used for existing on the market part mobile phone when wherein the mode of bonding, sucker connects, as long as the position of speaking of the bell sound on the mobile phone is more smooth; The mode of buckle, spiral be owing to will cooperate at the mobile phone end, needs to do corresponding design on the structure of mobile phone.

In a preferred embodiment of the present utility model, on above-mentioned throat and the above-mentioned mobile phone bell sound what go out that jockey that the line position links to each other adopts is adhering device, at this moment, this preferred embodiment also comprises soft foam 2 and release liners 3 with two-sided gum except above-mentioned exponential type horn 1.And as can be seen from Figure 2, above-mentioned throat has the frame 5 that grows, and this frame 5 is rectangles of chamfering, but it also can be any other suitable shapes.The one side 6 that above-mentioned soft foam viscosity is strong closely links to each other with the frame 5 that above-mentioned throat grows, and the weak slightly one side 7 of above-mentioned soft foam viscosity links to each other with release liners 3.

When using above-mentioned passive type mobile phone public address set, above-mentioned release liners 3 can be thrown off from this passive type mobile phone public address set, it is mutually bonding with mobile phone to have the weak slightly one side 7 of the viscosity of soft foam 2 of two-sided gum, makes the phonate hole of bell sound on the mobile phone be in the center of throat.When need not be above-mentioned during passive type mobile phone public address set, above-mentioned release liners 3 can be pasted again the weak slightly one side 7 of viscosity of getting back to soft foam 2 with two-sided gum.

The effect comparison of the passive type mobile phone public address set of the utility model one preferred embodiment as shown in Figure 3.This figure comprises the change curve of the acoustic pressure of two measurements along with frequency.Curve 9 is not for adding the frequency response curve of public address set, curve 10 is the frequency response curve after having added this public address set under all constant situation of other condition, as can be seen in this frequency range of 1KHz～8KHz, curve 10 is higher more than 10 decibels than curve 9, so the effect of this public address set is very tangible.

Certainly, the utility model also can have other embodiment, and the above is preferred embodiment of the present utility model only, is not to be used for limiting practical range of the present utility model; Under the situation that does not deviate from the utility model spirit and essence thereof, those of ordinary skill in the art are every to make various corresponding variations and modification according to the utility model content, all belongs to the protection range of claim of the present utility model.

Claims (7)

1. a passive type mobile phone public address set is characterized in that comprising exponential type horn and jockey, and above-mentioned exponential type horn has two openings, and an end is little opening, i.e. throat, and the other end is big opening, i.e. the horn mouth; Above-mentioned throat links to each other by the line position that goes out of bell sound on above-mentioned jockey and the mobile phone.

2. passive type mobile phone public address set according to claim 1 is characterized in that the shape of cross section area change rule at the above-mentioned x of the throat rice of above-mentioned exponential type horn distance is S (x)=S ₀e ^{δ x}, S wherein ₀Be above-mentioned exponential type horn throat shape area, S (x) is the above-mentioned exponential type horn shape of cross section area at the above-mentioned x of the throat rice of distance, and δ is a parameter of the above-mentioned exponential type horn cross sectional shape area change speed of decision, the index that promptly wriggles,

Above-mentioned sinuous index δ=4 π f _c/ c ₀, c wherein ₀Be THE VELOCITY OF SOUND IN AIR, f _cBe the cut-off frequency of above-mentioned exponential type horn, $f_c=\frac{1}{\sqrt{2}}{f}_{l1},$ F wherein _L1For having cut-off frequency f ₁The mobile phone speaker actual cut-off frequency of packing into and uprising behind the handset structure.

3. passive type mobile phone public address set according to claim 2 is characterized in that above-mentioned exponential type horn throat shape area $S_0=\frac{{\mathrm{\&rho;}}_0{c}_0{S}_D^2{\&CenterDot;R}_E}{{\left(\mathrm{Bl}\right)}^2},$ ρ wherein ₀Be atmospheric density, Bl is the electromechanical coupling factor of mobile phone speaker, R _EBe the direct current resistance of mobile phone speaker, S _DEffective radiating area for mobile phone speaker.

4. passive type mobile phone public address set according to claim 3 is characterized in that the horn degree of lip-rounding shape area S of above-mentioned exponential type horn _lBy horn port radius a _lDetermine, satisfy 2 π f _ca _l/ c ₀＞3.

5. passive type mobile phone public address set according to claim 4 is characterized in that above-mentioned exponential type horn length $l=\frac{1}{\mathrm{\&delta;}}\ln \frac{S_l}{S_0}.$

6. passive type mobile phone public address set according to claim 1 or 5 is characterized in that above-mentioned jockey is any in bonding, sucker, buckle, the screw.

7. passive type mobile phone public address set according to claim 6, it is characterized in that above-mentioned jockey is an adhering device, the throat of above-mentioned exponential type horn has frame, above-mentioned adhering device comprises soft foam and the release liners with two-sided gum, the one side that above-mentioned soft foam viscosity is strong closely links to each other with the frame of above-mentioned throat, and the weak slightly one side of above-mentioned soft foam viscosity links to each other with above-mentioned release liners.

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