CN102543057A - Automobile electronic speaker - Google Patents

Abstract

The invention aims to provide an electronic speaker with good tone quality. The automobile electronic speaker comprises a shell and a membrane, armatures which are mutually matched are arranged in the center of the shell and the membrane, wherein the boundary of the membrane at least comprises two straight-line-shaped string edges with different lengths. The membrane is fixed on the shell by more than two fixing points at intervals. According to the automobile electronic speaker, the boundary of the membrane at least comprises two straight-line-shaped string edges with different lengths, so that the membrane has fundamental tones of at least two frequencies, thereby further guaranteeing the good tone quality of the speaker. In addition, the fundamental tone frequency of the speaker can be conveniently calculated according to the length of the string edge. Therefore, the automobile electronic speaker is simple in design. The membrane is fixed on the shell by more than two fixing points at intervals. Compared with a traditional way of fixing the circumference of the membrane on the speaker shell, the fixing way disclosed by the invention is more convenient. The automobile electronic speaker has the advantages of simple structure, convenient manufacture, high pronouncing efficiency, good tone quality and good market prospect.

Description

A kind of automobile electronic loudspeaker

Technical field

The invention belongs to technical field of automotive electronics, specifically, relate to a kind of automobile electronic loudspeaker.

Background technology

Traditional automobile electronic loudspeaker adopts circular film; Its diaphragm periphery is fixed on the loudspeaker housing, and diaphragm central authorities are connected with armature, and this armature can be regarded a central fixed endpoint as; Making countless strings from central fixed endpoint to the diaphragm peripheral visual arranges; But their chord length equates, so tone color is single, pronunciation efficient is low, interesting to listen to inadequately.

Summary of the invention

The objective of the invention is to propose a kind of tuny electronic horn.

Automobile electronic loudspeaker of the present invention comprises housing and diaphragm; The central authorities of housing and diaphragm are provided with the armature of working in coordination; Key is that the border of said diaphragm comprises two rectilinear string limits that length is different at least, and said diaphragm is fixed on the housing by the point of fixity at plural interval.

The automobile electronic loudspeaker sounding is a kind of mechanical oscillation, wants it and sends tuny sound, and its sound must be many fundamental tones.When the diaphragm of loudspeaker was hit, diaphragm produced vibration, and fluctuation is through the reflection of film end, and the string limit forms standing wave, so the vibration on string limit is the vibration of standing wave form, and the point of fixity of loudspeaker can not vibrate, so point of fixity must be the node of standing wave, this is called boundary condition.Satisfy boundary condition, it is said that the wavelength r chord length of side L relation of standing wave should be following formula:

$L=\mathrm{<figure-callout\; id="2"\; label="n\; r"\; filenames="HSA00000659232600011.png,HSA00000659232600012.png"\; state="\{\{state\}\}">n</figure-callout>}\frac{r}{}\frac{}{2},n=\mathrm{1,2,3}......;$

To be worth the substitution following formula:

$f=\frac{u}{r}=\frac{1}{r}\sqrt{\frac{t}{u}};$

Obtain:

$f={\mathrm{<figure-callout\; id="1"\; label="nf"\; filenames="HSA00000659232600011.png,HSA00000659232600012.png"\; state="\{\{state\}\}">nf</figure-callout>}}_1,{\mathrm{<figure-callout\; id="1"\; label="f"\; filenames="HSA00000659232600011.png,HSA00000659232600012.png"\; state="\{\{state\}\}">f</figure-callout>}}_1=\frac{1}{2L}\sqrt{\frac{T}{u}}.$

Wherein T is the quality of membrane tension, and u is the quality of diaphragm unit length, therefore, as long as change L or T or u, can change f ₁Value, and f ₁Be the fundamental tone of diaphragm, f is an overtone, and the frequency of overtone f is fundamental tone f ₁Integral multiple, fundamental tone f ₁F is generically and collectively referred to as partials with overtone, i.e. the actual sound that sends of loudspeaker.Under the situation of the material that does not change diaphragm, only need to revise the length on linear string limit, can change fundamental tone f ₁Frequency, and then change the sound that loudspeaker sent.

The border of the diaphragm of loudspeaker of the present invention comprises two linear string limits that length is different at least; The fundamental tone that has two kinds of frequencies when guaranteeing its diaphragm sounding at least; Loudspeaker diaphragm more than circle; Therefore the tone color of loudspeaker is graceful, and conveniently calculates the fundamental frequency of loudspeaker through the string edge lengths, so simplicity of design.And the diaphragm of loudspeaker of the present invention to be point of fixity by plural interval be fixed on the housing, be fixed on the mode on the loudspeaker housing compared with traditional diaphragm periphery, fixing more convenient.

Further, the border of said diaphragm is surrounded by the arc angle between many straight line string limits and the adjacent string limit, and it is on the circle in the center of circle with the diaphragm center that the arc angle of said diaphragm is positioned at one; The quantity of said point of fixity is identical with the quantity of arc angle, and point of fixity is positioned at the arc angle place.Above-mentioned diaphragm, easy to make, save material, and good looking appearance.

Further, the string limit of said diaphragm is the even number bar, and the string limit is parallel and length is identical for wherein relative two, and the length on adjacent string limit is different.Above-mentioned diaphragm is symmetrical set, and shape is attractive in appearance, the more important thing is: there are two at least in the string limit of every kind of length in the diaphragm, therefore can strengthen the fundamental tone intensity of same frequency.

Further, the border of said diaphragm is surrounded by the arc angle between many different length rectilinear string limits and the adjacent string limit, and fundamental frequency is many.

Further, the point of fixity line of said diaphragm forms a regular polygon, and is fixing firm, attractive in appearance.

Automobile electronic loudspeaker of the present invention is simple in structure, easy to make, tone color is graceful, has good market outlook.

Description of drawings

Fig. 1 is the diaphragm structure figure of the automobile electronic loudspeaker of embodiment 1.

Fig. 2 is the diaphragm structure figure of the automobile electronic loudspeaker of embodiment 2.

Embodiment

Contrast accompanying drawing below; Through the description to embodiment, the effect of mutual alignment between the shape of specific embodiments of the invention such as related each member, structure, the each several part and annexation, each several part and principle of work etc. are done further to specify.

Embodiment 1:

The automobile electronic loudspeaker of present embodiment comprises housing and diaphragm; The central authorities of housing and diaphragm are provided with the armature of working in coordination; As shown in Figure 1; The border of diaphragm 1 is surrounded by the arc angle 4 between four straight line string limits 2,3,2,3 and the adjacent string limit, and wherein relative two string limits 2 are parallel and length is identical, and string limit 2 is parallel and length is identical; Adjacent string limit 2 is different with the length on string limit 3; It is on the circle in the center of circle with the diaphragm center that the arc angle 4 of diaphragm is positioned at one; Diaphragm is fixed on the housing by the point of fixity 5 at four intervals, and point of fixity 5 is positioned at arc angle 4 places and surrounds a square.

The border of above-mentioned diaphragm comprises the linear string limit 2,3 of two kinds of length, guarantees that diaphragm has the fundamental tone of at least two kinds of frequencies, and then has guaranteed that the tone color of loudspeaker is graceful, and conveniently calculates the fundamental frequency of loudspeaker through the length gauge on string limit 2,3, so simplicity of design.

Above-mentioned diaphragm 1 can be formed through cutting by circular film, and is easy to make, and good looking appearance.The string limit 2,3 of every kind of length all has two in the diaphragm 1, therefore can strengthen the fundamental tone intensity of same frequency.

In addition, the point of fixity 5 of diaphragm only has four and surround a square, is fixed on the mode on the loudspeaker housing compared with traditional diaphragm periphery, and is fixing more convenient, do not lose attractive in appearance simultaneously.

Embodiment 2:

The automobile electronic loudspeaker of present embodiment comprises housing and diaphragm; The central authorities of housing and diaphragm are provided with the armature of working in coordination; As shown in Figure 2, the border of diaphragm 1 is surrounded by different linear string limit 2,3,4,5 of four length and the arc angle 6 between the adjacent string limit, and two wherein relative string limits 2 are parallel respectively with 4 and 3 and 5; Diaphragm 1 is fixed on the housing by the point of fixity 7 at four intervals, and point of fixity 7 is positioned at arc angle 6 places and surrounds a square.

The border of above-mentioned diaphragm comprises four kinds of linear string limits 2,3,4,5 that length is different; Guarantee diaphragm vibration pronunciation; Fundamental tone with at least four kinds of frequencies, stack back and then guaranteed that the tone color of loudspeaker is graceful, the selected back of diaphragm material is according to material parameter; And conveniently calculate their fundamental frequency, so simplicity of design through the length gauge on string limit 2,3,4,5.

In addition, the point of fixity 7 of diaphragm only has four and surround a square, is fixed on the mode on the loudspeaker housing compared with traditional diaphragm periphery, and is fixing more convenient, do not lose attractive in appearance simultaneously.

Claims (5)

1. automobile electronic loudspeaker; Comprise housing and diaphragm; The central authorities of housing and diaphragm are provided with the armature of working in coordination, and it is characterized in that the border of said diaphragm comprises two rectilinear string limits that length is different at least, and said diaphragm is fixed on the housing by the point of fixity at plural interval.

2. automobile electronic loudspeaker according to claim 1 is characterized in that the border of said diaphragm is surrounded by the arc angle between many straight line string limits and the adjacent string limit, and it is on the circle in the center of circle with the diaphragm center that the arc angle of said diaphragm is positioned at one; The quantity of said point of fixity is identical with the quantity of arc angle, and point of fixity is positioned at the arc angle place.

3. automobile electronic loudspeaker according to claim 2, the string limit that it is characterized in that said diaphragm is the even number bar, and the string limit is parallel and length is identical for wherein relative two, and the length on adjacent string limit is different.

4. automobile electronic loudspeaker according to claim 1 is characterized in that the border of said diaphragm is surrounded by the arc angle between many different length rectilinear string limits and the adjacent string limit.

5. according to claim 1 or 2 or 3 or 4 described automobile electronic loudspeakers, it is characterized in that the line of the point of fixity of said diaphragm forms a regular polygon.

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