CN1988732A

CN1988732A - Bend tube bass box

Info

Publication number: CN1988732A
Application number: CN 200510135857
Authority: CN
Inventors: 朱斯忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-20
Filing date: 2005-12-20
Publication date: 2007-06-27

Abstract

The main feature of a bass speaker is that the cavity of speaker is a bending tube with one end closed and the other end open. The bass loudspeaker is installed in the middle of cavity to isolate it into two parts. On the practical application, two bending pipe are used, of which, one is a blind pipe 2 and the other is a through pipe 3 (two exports with different size). A bass loudspeaker is install at the butt joint of the two pipes, which are fixed together to form a. Bracket 4 is a pole with rubber sucker for fixing the speaker. The main advantage of this invention is: 1. the shape of speaker are varies, 2. even using the speaker with smaller diameter and lower quality can also get good low-frequency effects, 3. mold can be adopted to solve the large-scale production, 4. costs are reduced substantially.

Description

Bend tube bass box

Technical field

A kind of woofer, its principal character are that the cavity of audio amplifier is crooked pipeline, and end sealing, other end opening.Woofer is installed in the middle part of cavity, cavity is completely cut off be two parts.

Background technology

Audio amplifier is not only the carrier of loud speaker, and is the sound-absorptive object and the resonant body, particularly woofer of loud speaker, if there is not the booster action of audio amplifier, its function will be difficult to performance, even the result of no bass occurs.This be because, the frequency of sound is low more, its diffracting power is strong more, the sound wave in loud speaker the place ahead (being assumed to be the positive sound wave) is (opposite with the place ahead with the sound wave at rear, being the negative sound wave) intensity of wave amplitude equates, the negative sound wave at rear will mix with the positive sound wave around arriving the place ahead, and owing to phase place is cancelled out each other mutually on the contrary.And the high more sound of frequency, the ability of sound wave diffraction is weak more, that is to say, and its directivity is strong more.Therefore, the bass effect of audio amplifier, not only relevant with the size and the quality of woofer, volume and the structure with audio amplifier is closely related simultaneously; Opposite, the high pitch effect of audio amplifier depends mainly on the quality of high pitch loudspeaker, and is little with the relation of audio amplifier, even irrelevant.

After audio amplifier was the negative wave absorption, the positive sound wave just was not subjected to the pollution of negative sound wave, and bass is intactly reappeared.Simultaneously, mutual coupling by case chamber air resonance and loud speaker resonance, to greatest extent the loud speaker resonant energy is become case chamber resonant energy, by opening or empty cone resonant energy is radiate again, thereby improve low-frequency sound pressure and widened LF-response.The effect of Here it is audio amplifier.

Common audio amplifier mostly is cuboid (post).This class audio amplifier mainly makes low sound reproducing by the mode of noise reduction, and obvious not as the former to the effect of bass by resonance manner.And the latter to having relatively high expectations of equipment, material, technology and debugging technique, is difficult to accomplish a perfect state when debugging.Prior, this class audio amplifier appearance is single, and structure is old-fashioned and inflexible, can not satisfy the demand of the modern life to audio amplifier.

Summary of the invention

Among the present invention, with two bend pipes, one of them is crooked blind pipe (i.e. end sealing), another is crooked siphunculus (two ends are not sealed, and two outlets are in different size), at the joint of two bend pipes a woofer is installed, be fixed together, just form a bend tube bass box.

Bend tube bass box is not only a good sound-absorptive object, especially a frequency reducing body efficiently.Its operation principle is: loud speaker is installed in the openend of blind pipe, blind pipe is stopped up, form an airtight cavity in the pipe, this is a sound-absorptive object, the positive sound that loud speaker sends (or negative sound) will be all idle most in internal consumption, eliminated the stack of positive sound and negative sound, the pollution of having stopped sound comprehensively; Simultaneously, loud speaker forms another resonant cavity with the sealing of an end of siphunculus in the siphunculus, the negative sound that loud speaker sends (or positive sound), and the other end opening by this cavity spreads out of, and makes low sound reproducing.Because the two ends of the vibrating diaphragm of loud speaker have a resonant cavity respectively, air resonance in two chambeies acts on the both sides of the vibrating diaphragm of loud speaker simultaneously, as two springs, make the vibration of vibrating diaphragm slow down, cycle obviously extends, frequency significantly reduces, thereby has realized the effect that low frequency extends significantly downwards.

The factor of effect that influences bend tube bass box is less, except that material, and the outlet size of bifistular length of major influence factors and siphunculus.During conditions permit, should adopt the longer pipe body, body is long as far as possible, and the chamber internal volume is big, and is favourable to the downward extension of low frequency.The outlet size of siphunculus, obvious to the influence of audio, export excessively, resonance intensity and siphunculus interior resonance intensity in the blind pipe differ too big, back of the body radiation strengthens in the pressure imbalance of vibrating diaphragm both sides, casing, and sound dyes and increases the weight of, even distortion, at this moment, even it is also of no avail to increase sound-absorbing material in the chamber; Otherwise, export too for a short time, though dying, sound reduces, the volume that outwards spreads out of the low frequency that comes simultaneously also reduces.Suitable outlet size, even can be without sound-absorbing material.

For reducing length, outlet also can be adopted the mode of similar phase-reversing tube, tubule is embedded in the bassoon form; Loud speaker can be installed over against blind pipe, also can install back to blind pipe; The size at pipe two ends can equate, also can be not wait, or evenly dwindle; The cross section of pipe can be circular, oval, square, polygon or other irregular shape etc.; The curvature of canal curvature can be uniformly, also can be uneven; The center curve of canal curvature can be the combination of camber line, broken line or camber line and other line; Pipe can be at same plane inner bending, also can be crooked in the space; The material of pipe can be plastics, timber, metal etc.;

Be stained with one deck sound-absorbing material in the inboard of blind pipe and siphunculus, can reduce the reflection of sound, dye thereby reduce sound.

On the basis of this audio amplifier, increase a little cavity, as the carrier of medium and high pitch loudspeaker, just formed the audio amplifier of full range.This point is identical with common audio amplifier, repeats no more here.

Compare with traditional audio amplifier, benefit of the present invention mainly contains: 1, the profile of audio amplifier is ever-changing, no longer sticks to single cuboid profile, cooperates different colors, can produce in different poses and with different expressions, colourful audio amplifier; 2, because audio amplifier has significant frequency reducing effect, lower to the requirement of loud speaker, use promptly that bore is less, the loud speaker of inferior quality (or even Squawker) also can obtain low-frequency effect preferably; 3, can solve shell production problem by mould, be applicable to a large amount of productions.4, cost reduces significantly.

Description of drawings

Below in conjunction with accompanying drawing this invention is described further.

Accompanying drawing 1 is the schematic diagram (longitudinal section) of bend tube bass box, and accompanying drawing 2 is exploded views (longitudinal section) of this principle.Accompanying drawing 3 is application examples of the present invention.

In accompanying drawing 1 and the accompanying

drawing

2,1 is loud speaker, and 2 is blind pipe, and 3 is siphunculus, and 4 is the support of audio amplifier.

The sealing of blind pipe 2 one ends, other end opening; The both ends open of siphunculus 3, small one and large one; At the joint of two pipes, woofer 1 is installed, a Here it is bend tube bass box.Support 4 is auxiliary members, is used for fixing audio amplifier, does not have direct relation with tonequality.

Because woofer 1 is installed in the openend of blind pipe 2, blind pipe 2 is stopped up, airtight cavity of 2 inner formation in the pipe, this is a sound-absorptive object, the positive sound that woofer 1 sends (or negative sound) will be all idle most in internal consumption, eliminated the stack of positive sound and negative sound, the pollution of having stopped sound comprehensively; Simultaneously, woofer 1 forms another resonant cavities with the sealing of an end of siphunculus 3 in the siphunculus 3, the negative sound that woofer 1 sends (or positive sound), and the other end opening by this cavity outwards spreads out of, and makes low sound reproducing.Because the two ends of the vibrating diaphragm of woofer 1 have a resonant cavity respectively, air resonance in two chambeies acts on the both sides of the vibrating diaphragm of loud speaker simultaneously, make the vibration of vibrating diaphragm of woofer 1 slow down as two springs, vibration period obviously extends, frequency significantly reduces, thereby has realized the effect that the downward concentration of low frequency is extended.

Except that material, the length of bass effect and blind pipe 2 and siphunculus 3 also has the outlet size of siphunculus 3 relevant.Body is long, and the chamber internal volume is big, and is favourable to the downward extension of low frequency.The outlet size of siphunculus 3, obvious to the influence of audio, export excessively, resonance intensity and siphunculus 3 interior resonance intensity in the blind pipe 2 differ too big, and back of the body radiation strengthens in the casing, and sound dyes and increases the weight of, even distortion, at this moment, even the increase sound-absorbing material is also of no avail in the chamber; Otherwise, export too for a short time, though dying, sound reduces, the volume that outwards spreads out of the low frequency that comes simultaneously also reduces.Suitable outlet size, even can be without sound-absorbing material.

Embodiment accompanying drawing 3 is application examples of the present invention, and the left side is an exploded view, and the right side is the constitutional diagram after assembling.

In the accompanying drawing 3, blind pipe 2 is two plastic tubes with siphunculus 3, and the center path of blind pipe 2 bendings is S shapes, and the center path of siphunculus 3 bendings is circular arcs, and outlet is the opening of a tubule that embeds conversely.Woofer 1 is fixed on the interface of blind pipe 2 and siphunculus 3.The holding wire of woofer 1 can be drawn from the lower end of siphunculus 3, but requires air tight.Support 4 is poles that have rubber suction cups, and by being threaded into the bottom of siphunculus 3, rubber suction cups can hold level and smooth ground, prevents that audio amplifier from falling down.

Here, 5 is additional cavity, is used to install medium and high pitch loudspeaker.

Dye for further reducing sound, also can paste sound-absorbing material in the blind pipe 2 and the inboard of siphunculus 3.

Claims

1, a kind of woofer, its principal character are that the cavity of audio amplifier is crooked pipeline, and end sealing (cecum), other end opening.Loud speaker is installed in the middle part of cavity, cavity is completely cut off be two parts.

2, according to the bend tube bass box under the claim 1, it is characterized in that audio amplifier mainly is made up of woofer, blind pipe and siphunculus, loud speaker is fixed on the joint of two pipes.

3, according to the bend tube bass box under the claim 1, it is characterized in that its bend mode is varied, can be the combination of camber line (containing circular arc and helix etc.), broken line or camber line and other line.

According to the bend tube bass box under the claim 1, it is characterized in that 4, the cross section of pipe can be circular, oval, square, polygon or other irregular shape etc.; And cross section can be regular or irregular variation, or even Embedded structure.

According to the bend tube bass box under the claim 1, it is characterized in that 5, pipeline can be at same plane inner bending, also can be crooked in the space.

6, according to the bend tube bass box under the claim 1, it is characterized in that loud speaker can be installed over against blind pipe, also can install back to blind pipe.