CN1104403A

CN1104403A - Porcelain sound box

Info

Publication number: CN1104403A
Application number: CN 94111344
Authority: CN
Inventors: 张卫东; 王翠兰
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-01
Filing date: 1994-06-01
Publication date: 1995-06-28

Abstract

The sound box includes a box body in which there are a woofer as well as a tweeter. Its characteristic is that, the box bocdy is made of ceramic material, at the back part of the tweeter there is a small ceramic cavity resonator which seals the back part of the tweeter completely.

Description

Porcelain sound box

The present invention relates to a kind of audio amplifier.

Application along with digital audio technology, promoted the development of electro-acoustic element greatly, especially greatly dynamically, low noise, broadband CD-audio player and the large quantities of families that pour in of the high high-power sound amplifier of fax, naturally the audio amplifier that converts the electrical signal to acoustical signal is at last had higher requirement, a kind of volume is little, power big, dynamic big little audio amplifier owing to the restriction that is subjected to the room is all wished to have to hold metropolitan fans on the other hand, its sound-reducing is better, can reach the effect of heavy caliber loudspeaker acoustic enclosure.Existing electroacoustic techniques sound case has been difficult to supporting for it in the face of the high speed development of digital audio technology, even present high-quality wooden sound case or high polymer sound case, for the expansion low-frequency response, what therefore its volume was done is also very big, owing to be wooden audio amplifier, casing is easy to produce resonance, causes sound dyeing, adds thing such as yellow sand cement for weakening again and make audio amplifier heavy more in casing.So it is poor by the loose sound insulation property of its bulk density of audio amplifier that timber or high density fiberboard are made, be difficult to seal easy gas leakage after the moulding, the installation of adding speaker frame is directly to be fixed on the casing, the big vibration that the vibration of basin frame will drive the sound box panel dynamically the time makes it to produce the interference of sound wave, though these problems can solve by a lot of ways, more or less all exist some shortcomings.

On the other hand, the invention of pottery and porcelain is made and is produced, be ancient invention of the Chinese nation and creation, China is the product pottery state that is widely reputed in the world, having many uses too of pottery, but its main application is the making aspect that is used in pottery and porcelain at present, as craft artistic pottery and porcelain, health is with ceramic, architectural pottery, aspects such as chemical stoneware and electronic device pottery, and the variation of intensive research pottery and porcelain structure is to the influence of electroacoustics frequency response and to high frequency, intermediate frequency, the equifrequent absorption of low frequency, sound insulation, attributes such as Q value and resonance, and the research of the sounding of pottery or a blank.

Purpose of the present invention is exactly in order to address the above problem, and providing a kind of is the sound box bodies material with the pottery, has that volume is little, high-power, big dynamically, tonequality is good and does not have the ceramic loudspeaker box of phenomenons such as resonance, self-vibration, sound insulation are poor, sound dyeing.

Technical solution of the present invention:

A kind of ceramic loudspeaker box, it includes sound box bodies (1), is provided with bass horn (2) and loudspeaker (3) in it, it is characterized in that:

A. sound box bodies (1) is made by ceramic material;

B. the rear portion of corresponding loudspeaker (3) is connected with ceramic areola body (4) in the ceramic casing of loudspeaker (1), and loudspeaker (3) rear seal is lived.

The present invention adopts ceramic material to make audio amplifier, and it is to utilize ceramic material to electroacoustical frequency response characteristic, and according to conspicuous nurse nuclear magnetic resonance apparatus principle, and integrated electronics technology, electroacoustics technology make, and this technology is world's initiative.Audio amplifier of the present invention have small size, high-power, big dynamically, characteristics such as high tone quality, broadband, LF-response be good, and overcome deficiencies such as wooden audio amplifier and the easy resonance of high polymer audio amplifier, self-vibration, sound insulation are poor, sound dyeing.The present invention makes ceramic loudspeaker box have the acoustically effective of self by the different components proportioning of pottery and ceramic material.Simultaneously because the high bulk density of ceramic material, its rigidity casing of making itself has good defening effect again and becomes the conspicuous nurse nulcear magnetic resonance (NMR) case of a real rigidity, LF-response is further expanded, and definitely eliminated the possibility that the self-vibration of audio amplifier and acoustic energy are outwards propagated by casing, this audio amplifier can be directly and digital audio system supporting.

Fig. 1 is the front schematic view of sound box bodies of the present invention;

Fig. 2 is the sectional side view of sound box bodies of the present invention;

Fig. 3 is the LC frequency divider electrical schematic diagram of loudspeaker of the present invention;

Fig. 4 is the LC frequency divider electrical schematic diagram of bass horn of the present invention.

As Fig. 1,2, the most handy ceramic of sound box bodies (1) becomes, and as doing with boccaro or cinnabar ceramic, the most handy porcelain of the areola body (4) in the sound box bodies (1) is made, as making of 85 porcelain.Because pottery mud and porcelain mud are the nonmetallic materials of two kinds of different attributes, there are identical chemical analysis and different compositions to combine between them to making pottery and porcelain.Their identical main chemical are aluminium oxide (Al ₂O ₃) and silica (SiO ₂), if SiO wherein ₂Content is more than 60%, and water absorption rate is greater than 20% the pottery that is, if Al wherein ₂O ₃Content more than 60% and water absorption rate be lower than 2% the porcelain that is.Hence one can see that just can obtain the pottery and the porcelain of different attribute with aluminium oxide and silica by the combination of different proportion, and how many potteries of being formed of the size of aluminium oxide and silica composition have different expansion high and low frequencies, absorb characteristics (Q resonance peak) such as acoustic energy, resistance sound, reflection and resonance acoustic energy and audio frequency with porcelain.Prove by experiment, with the conspicuous nurse nuclear magnetic resonance apparatus that boccaro is made pottery and made, because its Main Ingredients and Appearance is a silica, particle is thick relatively, bulk density is low, not as porcelain, its rigidity is also hard not as porcelain, so it is good to LF-response, can play the effect of expansion low-frequency, and resonance peak Q is low, and certain sound absorption, sound insulation and acoustic characteristics are arranged, so Tao Shiying makes the low frequency audio amplifier.And the Main Ingredients and Appearance of porcelain is an aluminium oxide, and its particle is thin, the bulk density height, intensity is hard, and resonance peak Q height responds high frequency characteristics, be suitable for making the high frequency audio amplifier, so sound box bodies (1) is done with ceramic among the figure, the areola body (4) at loudspeaker (3) rear portion is done with ceramic.With the audio amplifier of making pottery and to make respectively with porcelain, they all have conduct heat low, can not give birth to hotly because of the friction of air, casing friction, casing acoustic damping are good, no casing sound such as dyes at characteristics.

Among the present invention, boccaro pottery mud with 85% or cinnabar pottery mud add 15% pulverized coal ash mixing, be fired into sound box bodies (1) through the special processes oven dry back that is shaped in 900 ℃ high temperature kiln, then to be 85% porcelain be fired in 1400 ℃ high temperature furnace after drying through shaping areola body (4) with salic.Areola body (4) is positioned at the position at corresponding loudspeaker (3) rear portion of sound box bodies (1) antetheca, and is connected as a single entity with this position, can stick with glue to connect, and also can connect with bolt by preformed hole.Because areola body (4) is lived the rear seal of loudspeaker (3), so interior high frequency sound of sound box bodies (1) and all-bottom sound are separated from each other and do not interfere.The streamline moulding has been adopted in outside in sound box bodies (1), has prevented positive acoustic radiation effectively and reflexes on the panel.On sound box bodies (1) rear wall (or antetheca), have resonantron (5), but the relevant position of sound box bodies (1) rear wall of bass horn (2) rear portion correspondence should except.The diameter of resonantron (5) is 20-60mm, keeps a determining deviation between the inner termination of resonantron (5) and sound box bodies (1) the front and back walls inner surface, and this spacing is not less than 40mm.If resonantron (5) just in time is positioned at the position of the corresponding areola body of sound box bodies (1) rear wall (4), then Ci Shi spacing is meant the inner termination of resonantron (5) and the spacing between areola body (4) rear wall.Resonantron (5) has the effect of regulating resonance peak Q, and by the resonantron (5) of selecting different-diameter and length for use, can obtain the resonantron (5) that different LF-response makes with different ceramic materials has different tonequality again.Because the size of resonantron (5) can determine low frequency characteristic, so that sound box bodies (1) can be done is very little.For guarantee voice unit and bass unit signal accurately be transferred to separately loudspeaker (3) and bass horn (2) go up and do not produce driedly scratch, modified tone and phase distortion, the present invention goes up each access-LC frequency divider according to the characteristics of ceramic loudspeaker box at loudspeaker (3) and bass horn (2).LC frequency divider such as Fig. 3 that loudspeaker (3) is connect, it is by capacitor C ₁, inductance L ₁, resistance R ₁The high pass filter of forming, it only allows high-frequency signal (as the above signal of 3700HZ) to pass through.The LC frequency divider that bass horn (2) is connect is by inductance L ₂, capacitor C ₂The low pass filter of forming and by capacitor C ₃, C ₄, resistance R ₂, R ₃The phase frequency correcting network of forming constitutes, and it allows low frequency signal (as 3700R ₂, R ₃The phase frequency correcting network of forming constitutes, and it allows low frequency signal (as the signal below the 3700HZ) pass through.Audio signal makes the radio-frequency component of high-frequency signal (more than 3700HZ) go work by voice unit after by frequency divider like this, and low frequency signal (below 3700HZ) goes work by the low frequency audio amplifier.

Among the present invention, the divider elements that loudspeaker (3) and bass horn (2) are connect all is located on the interior wiring board (6) of sound box bodies (1), high and low sound loudspeaker (3), (2) are put on its corresponding aperture from the antetheca of sound box bodies (1), can be encased inside bump protection ring all around, the fixing of them can connect by gluing, also can connect with bolt by preformed hole.

Audio amplifier of the present invention can adopt the ceramic material of various different components combinations to make as required, can form the speaker products of various series.

Claims

1, a kind of ceramic loudspeaker box, it includes sound box bodies (1), is provided with bass horn (2) and loudspeaker (3) in it, it is characterized in that:

A. sound box bodies (1) is made by ceramic material;

2, by the described ceramic loudspeaker box of claim 1, it is characterized in that sound box bodies (1) becomes with ceramic, the areola body (4) in it is made with porcelain.

3, by claim 1 or 2 described ceramic loudspeaker boxes, it is characterized in that sound box bodies (1) the most handy boccaro or cinnabar ceramic work, the most handy 85 porcelain of areola body (4) are made.

4, by the described ceramic loudspeaker box of claim 1, it is characterized in that ceramic casing of loudspeaker (1) rear wall (or antetheca) is provided with resonantron (5) (except that the sound box bodies rear wall position of bass horn rear portion correspondence).

5, by the described ceramic loudspeaker box of claim 4, the diameter that it is characterized in that described resonantron (5) is 20-60mm, keep a determining deviation between the inner termination of resonantron (5) and sound box bodies (1) the front and back walls inner surface (or and areola body rear wall), this spacing is not less than 40mm.