CN217883808U - Coaxial plane wave sound box - Google Patents

Abstract

The utility model provides a coaxial plane wave sound box, which comprises a shell, a loudspeaker and a waveguide tube; the loudspeaker comprises a first loudspeaker and a second loudspeaker which generate sound waves with different frequencies; a cavity is formed in the shell, a sound outlet is formed in the top of the cavity, and a first horn is arranged in the cavity right below the sound outlet; the waveguide tube is arranged on the first horn and used for guiding the sound waves generated by the first horn; the side wall of the cavity is also provided with a partition wall, the mounting groove, the top surface of the waveguide tube and the partition wall form a propagation channel, and the propagation channel is used for guiding sound waves generated by the second loudspeaker; the utility model can gather the sound waves of different audio frequencies generated by the loudspeakers of different audio frequencies to the sounding opening and spread the sound waves outwards in a plane wave mode; mutual interference and distortion of sound waves of different audio frequencies are effectively avoided.

Description

Coaxial plane wave sound box

Technical Field

The utility model relates to a stereo set technical field, concretely relates to coaxial plane ripples stereo set.

Background

The sound effect of the sound is paid attention by consumers as an important device for playing, and the coaxial loudspeaker in the sound is that one loudspeaker has high pitch and low pitch, namely two loudspeakers are arranged on the same axis and are respectively responsible for playing the high pitch and the medium and low pitch. Coaxial means that all frequency signals in the range of 20 Hz-20000 Hz propagate into the listener's ear on the same axis; at the same time, its physical location is close to the point source. Therefore, although the coaxial loudspeaker can be provided with the high pitch loudspeaker and the heavy bass loudspeaker on the same axis, the high pitch loudspeaker and the low pitch loudspeaker are both directly emitted to the surrounding environment from the loudspeaker sound emitting point and then mixed in the surrounding environment, and the sound effect after sound mixing is poor, so that the loudspeaker has the propagation characteristic of a point sound source, namely, the coverage angle is large, and the sound pressure attenuation is fast.

Disclosure of Invention

The utility model provides a coaxial plane wave sound box, which uses the structure of the utility model to gather sound waves of different audio frequencies generated by loudspeakers of different audio frequencies to the sounding opening and spread the sound waves outwards in a plane wave mode; the mutual interference and distortion of sound waves of different audio frequencies are effectively avoided, and the sound box is small in size.

In order to achieve the above purpose, the technical scheme of the utility model is that: a coaxial plane wave phase sound comprises a shell, a loudspeaker and a waveguide tube; the horn comprises a first horn and a second horn which generate sound waves with different frequencies;

a cavity is formed in the shell, a sound outlet is formed in the top of the cavity, and a mounting groove for mounting a first loudspeaker is formed in the cavity under the sound outlet; the waveguide tube is arranged on the first horn and used for guiding sound waves generated by the first horn; a waveguide sound outlet, a first sound wave guide channel and a second sound wave guide channel are arranged in the waveguide tube, the waveguide sound outlet and the first sound wave guide channel are positioned on the same straight line, the waveguide sound outlet and the sound outlet are correspondingly arranged, the second sound wave guide channel is arranged on two sides of the first sound wave guide channel, and first frequency sound waves transmitted to the channel by the second sound wave guide channel are mixed with second frequency sound waves transmitted by the first sound wave guide channel at the waveguide sound outlet;

the two sides of the accommodating cavity, which are positioned on the mounting groove, are respectively provided with a second loudspeaker, the side walls of the accommodating cavity, which are positioned on the two sides of the sound outlet, are provided with partition walls, propagation channels for guiding sound waves generated by the second loudspeakers are formed between the partition walls and the mounting groove and between the partition walls and the waveguide tubes, and third frequency sound waves generated by the second loudspeakers are mixed and output at the sound outlet through the propagation channels and the first frequency sound waves and the second frequency sound waves.

According to the arrangement, sound waves with two different frequencies generated by the first loudspeaker are guided through the first sound wave channel and the second sound wave channel respectively and then are mixed at the waveguide sound outlet and then reach the sound outlet, and sound waves generated by the two second loudspeakers are propagated through the channels in sequence and then are guided to reach the sound outlet; like this, the sound wave that the second loudspeaker produced is through propagating the passageway direction back, converge in the sound outlet below with the sound wave that first loudspeaker produced, and outside the casing is sent out through the sound outlet, because the sound wave of different frequencies is sent out through a sound outlet, make the sound wave form the plane wave after mixing, thereby prevent because the problem that sound effect is poor appears in the air with the point sound source is propagated to different frequency sound waves, simultaneously because the sound wave of different frequencies adopts different sound wave passageways to propagate, thereby effectively avoided the mutual interference of the sound wave of different audio frequencies to lead to the distortion, in addition because the second loudspeaker sets up in both sides according to the recess, thereby utilize a stereo set casing can realize mixing multiple different frequency sound waves, the stereo set is small.

Further, the waveguide comprises a mounting seat and a cover plate; the waveguide sound outlet is arranged at the top of the cover plate; the mounting seat comprises a mounting seat body part and a throat plug part arranged on the bottom surface of the mounting seat body part, a first sound guide groove is arranged on the mounting seat body part and corresponds to the waveguide sound outlet, a through groove is formed in the throat plug part and opposite to the first sound guide groove, and the first sound guide groove is communicated with the through groove to form a first sound wave guide channel; the through groove of the throat plug part is arranged at the position, corresponding to the sound emitting position, of the second frequency sound wave of the first loudspeaker; and second sound guide grooves are arranged on two sides of the first sound guide groove of the mounting seat body part and correspond to the sound outlet positions of the first frequency sound waves.

According to the arrangement, the first frequency sound wave generated by the first loudspeaker enters the first sound guide groove, and the second frequency sound wave generated by the first loudspeaker enters the second sound guide groove and is transmitted, so that the high-pitch sound wave and the low-pitch sound wave are converged at the sound outlet of the waveguide and are transmitted towards the sound outlet through the sound outlet of the waveguide; realize first leading the sound groove and the formation of second leading the sound groove structure through the mode that sets up mount pad and apron, the structure is reliable and simple, realizes being connected with first loudspeaker through the larynx cock portion that sets up downwardly extending on the mount pad simultaneously, can realize leading through different leading the sound groove respectively with the sound wave of two different frequencies that first loudspeaker sent effectively.

Further, the plane where the propagation channel is located is perpendicular to the central axis of the second horn; the propagation channel is arranged upwards and slantwise towards the sound outlet; therefore, the sound waves generated by the second loudspeakers are guided by the propagation channel and are propagated to the sound outlet, and the obliquely arranged propagation channel can better prevent the third frequency sound waves generated by the two second loudspeakers from influencing each other.

Further, the horn base that is used for installing the second loudspeaker is symmetrically formed on the partition wall of mounting groove both sides, and above setting is convenient for install the second loudspeaker in the casing.

Furthermore, a longitudinal reinforcing rib plate is arranged in the waveguide sound outlet, extends from the waveguide sound outlet to the first sound guide groove and is positioned between the two second sound wave channels to divide the waveguide sound outlet into more than two sound outlet units with the same size; through the arrangement, when the sound waves passing through the first sound guide groove and the second sound guide groove pass through the longitudinal reinforcing rib plates, the longitudinal reinforcing rib plates segment the sound waves of the two second sound channels, and the sound waves in the two second sound channels are prevented from influencing each other, so that mutual interference and distortion are reduced.

Furthermore, the cover plate is respectively provided with sound guide parts at two sides of the sound outlet of the waveguide, the sound guide parts are formed by upwards and inwards recessing from the bottom of the cover plate, the sound guide parts are communicated with the second sound guide grooves to form a second sound wave channel, and one side surfaces of the sound guide parts are obliquely arranged towards the sound outlet of the waveguide; according to the arrangement, the sound waves passing through the second sound guide groove are transmitted under the guiding effect of the sound guide part, and meanwhile, the sound waves entering the sound guide part are reflected by the inclined side face of the sound guide part due to the inclined side face of the sound guide part, so that the bass sound wave transmission path is prolonged, and the situation of distortion caused by the fact that the difference between the treble sound wave transmission path and the bass sound wave transmission path is too large is prevented.

Furthermore, more than two transverse reinforcing rib plates are arranged on the longitudinal reinforcing rib plate, and two ends of the bottom of each transverse reinforcing rib plate extend to the sound guide part respectively; through the arrangement, the waveguide sound outlet can be further divided into a plurality of sound outlet units while the strength of the longitudinal reinforcing rib plate is enhanced through the arrangement of the transverse reinforcing rib plate.

Furthermore, the section of the mounting seat base part is trapezoidal, the cover plate comprises a first plate body and second plate bodies positioned on two sides of the first plate body, and the second plate bodies and the first plate body are obliquely arranged; above setting for the mount pad is inseparabler and reliable with the apron laminating.

Furthermore, the first horn emits the first frequency sound wave as a low frequency sound wave, the first horn emits the second frequency sound wave as a high frequency sound wave, and the second horn emits a middle tone or a low tone;

above setting, because the propagation characteristic of bass sound wave easily reflects, thereby change the direction through repeated reflection extension bass sound wave propagation path, form the plane wave through the waveguide sound outlet with the high pitch sound wave through first sound guide groove with the same direction up, to the sound outlet direction propagation of casing, like this, make the high pitch sound wave and the bass sound wave of first loudspeaker can form the sound wave of plane wave form, avoided the mutual interference and the distortion of the sound wave of the different audio frequencies that first loudspeaker produced.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a cross-sectional view of fig. 1.

Fig. 3 is a schematic structural diagram of the present invention for removing the state of the waveguide.

Fig. 4 is a schematic perspective view of a waveguide according to the present invention.

Fig. 5 is a perspective view of another angle of the waveguide according to the present invention.

Fig. 6 is a schematic view of the split structure of the medium wave guide tube of the present invention.

Fig. 7 is a schematic structural view of the medium wave guide tube of the present invention.

Reference numerals are as follows: 1. a housing; 11. a cavity; 111. installing a groove; 12. a sound outlet; 13. a partition wall; 131. a sound outlet branch groove; 132. a propagation channel; 133. a horn base; 2. a waveguide; 21. a mounting seat; 211. a trapezoidal portion; 2111. a first sound guide groove; 2112. a second sound guide groove; 2113. a spherical surface portion; 212. a plug-off portion; 22. a cover plate; 221. a waveguide sound outlet; 222. reinforcing rib plates; 223. a sound guide part; 31. a first horn; 32. a second horn.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 7, a coaxial plane wave sound comprises a housing 1, three horns generating sound waves of different frequencies, and a waveguide 2; the horns specifically include a first horn 31 and a second horn 32; a cavity 11 is formed in the housing 1, a sound outlet 12 is formed in the top of the cavity 11, an installation groove 111 for installing the first horn 31 is formed in the cavity 11 right below the sound outlet 12, and the installation groove 111 extends in the direction far away from the sound outlet 12; the first horn 31 is installed in the installation groove 111, and the waveguide 2 is disposed on the installation groove 111; in this embodiment, the sound outlet 12 is located above the intersection of the central axes of the first horn 31 and the second horn 32, in this embodiment, the first horn 31 is a coaxial high-low sound horn for emitting low-frequency sound waves and high-frequency sound waves, the second horn emits middle-frequency sound or low-frequency sound waves, and the cross section of the sound outlet 12 is rectangular.

The cavity 11 is located on the partition wall 13 at two sides of the sound outlet, the partition wall 13 is provided with a sound outlet supporting groove 131, a propagation channel 132 for guiding the sound waves generated by the second speaker 32 is formed between the partition wall 13 and the installation groove 111 and between the partition wall 13 and the waveguide tube 2, and two ends of the propagation channel 132 are respectively communicated with the sound outlet 12 and the sound outlet of the sound waves generated by the second speaker 32; in the present embodiment, the angle between the second horn 32 and the central axis of the first horn 31 is 65 ° -70 °.

With the above arrangement, the sound waves generated by the first horn 31 are guided to the sound outlet 12 through the waveguide 2, and the sound waves generated by the two second horns 32 are guided to the sound outlet 12 through the propagation channel 132; in this way, after the sound waves generated by the second speaker 32 are guided through the propagation channel 132, the sound waves converge below the sound outlet 12 together with the sound waves generated by the first speaker 31, and leave the housing 1 through the sound outlet 12, so that the sound waves form plane waves, and mutual interference and distortion of the sound waves of different audio frequencies are effectively avoided.

The waveguide tube 2 is internally provided with a waveguide sound outlet 221, a first sound wave guide channel A and a second sound wave guide channel B, the waveguide sound outlet 221 and the first sound wave guide channel A are positioned on the same straight line, the waveguide sound outlet 221 and the sound outlet are correspondingly arranged, the second sound wave guide channel B is arranged on two sides of the first sound wave guide channel A, and first frequency sound waves transmitted to the channel B by the second sound wave guide channel B are mixed with second frequency sound waves transmitted by the first sound wave guide channel A at the waveguide sound outlet.

The waveguide 2 includes a mount 21 and a cover plate 22; the top of the cover plate 22 is provided with a waveguide sound outlet 221 for outputting sound waves of the first loudspeaker 31; the mounting seat 21 comprises a mounting seat base portion 211 and a throat plug portion 212 arranged on the bottom surface of the mounting seat base portion 211, a first sound guide groove 2111 is arranged in the middle of the mounting seat base portion 211, the first sound guide groove 2111 is arranged opposite to the waveguide sound outlet 221, two ends of the first sound guide groove 2111 gradually extend downwards to the throat plug portion 212, and a through groove communicated with the first sound guide groove 2111 is arranged at the bottom of the throat plug portion 212; the first sound guide groove 2111 and the through groove form a first sound wave guide channel A, and the through groove of the throat plug part 212 is arranged corresponding to the sound outlet position of the first loudspeaker 31; the mounting base portion 211 is provided with second sound guide grooves 2112 on both sides of the first sound guide groove 2111, and the second sound guide grooves 2112 are provided corresponding to the sound emitting position of the first frequency sound wave.

The cover plate 22 is provided with a sound guiding portion 223 in the sound outlet groove, the sound guiding portion 223 is formed by being recessed upwards from the bottom of the sound guiding cover plate 22, the sound guiding portion 223 is communicated with the second sound guiding groove 2111 to form a second sound wave channel B, and one side of the sound guiding portion 223 is obliquely arranged towards the sound guiding outlet 221.

In this embodiment, the section of the mounting base portion 211 is trapezoidal, the cover plate 22 includes a first plate 2201 and second plates 2202 located at two sides of the first plate 2201, and the second plates 2202 and the first plate 2201 are disposed in an inclined manner.

The reinforcing rib plate 222 extends to the sound guide part 223; in the present embodiment, the sound guide 223 has a trapezoidal cross section; with the above arrangement, the sound wave passing through the second sound guide groove 2112 is guided by the sound guide portion 223, so that the reflection efficiency of the low-pitched sound wave is further improved, and the propagation path of the low-pitched sound wave is increased more quickly, thereby preventing the poor mixing effect of the low-pitched sound wave and the high-pitched sound wave due to the difference in propagation paths.

In the present embodiment, a spherical portion 2113 is formed on the bottom surface of the mounting base portion 211 so as to extend in the direction of the throat portion 212 around the center axis of the throat portion 212, and the second sound guide groove 2112 is provided through the spherical portion 2113.

The plane in which the propagation channel 132 lies is arranged perpendicular to the central axis of the second horn 32; the propagation channel 132 is gradually disposed obliquely upward and toward the sound outlet 12; thus, the sound wave generated by the second speaker 32 is guided by the propagation channel 132 and propagates toward the sound outlet 12.

Horn seats 133 for mounting the second horn 32 are symmetrically formed on the partition walls 13 on both sides of the mounting groove 111.

A longitudinal reinforcing rib plate 222 is arranged in the waveguide sound outlet 221, and the longitudinal reinforcing rib plate 222 divides the waveguide sound outlet into more than two sound outlet units with the same size; the longitudinal reinforcing rib plate 222 extends from the waveguide sound outlet to the first sound guide groove 2111, the longitudinal reinforcing rib plate 222 is positioned between the two second sound wave channels B, and the reinforcing rib plate 222 guides sound waves further when the sound waves passing through the first sound guide groove 2111 and the second sound guide groove 2112 pass through the longitudinal reinforcing rib plate 222, so that mutual interference and distortion are reduced.

The longitudinal reinforcing rib plate 222 is provided with more than two transverse reinforcing rib plates 2221, and two ends of the bottom of the transverse reinforcing rib plates 2221 extend to the sound guide part respectively.

With the above arrangement, the treble sound waves generated by the first horn 31 enter the first sound guide groove 2111, and the bass sound waves generated by the first horn 31 enter the second sound guide groove 2112 and are reflected to change the propagation path, so that the treble sound waves and the bass sound waves are converged at the waveguide sound outlet 221 and are propagated towards the sound outlet 12 through the waveguide sound outlet 221; since the low-pitched sound wave is easily reflected in its propagation characteristic, the path is changed by repeating the reflection to increase the propagation path until the high-pitched sound wave passing through the first sound guide groove 2111 forms a plane wave through the waveguide sound outlet 221, propagating toward the sound outlet 12 of the housing 1; since the high pitch sound wave has the characteristics of short wavelength, easy scattering, poor penetration force and short propagation distance, the first sound guide groove 2111 is arranged above the high pitch part to reduce the reflection of the high pitch sound wave generated by the high pitch part, thereby ensuring the quality of the high pitch sound wave; in addition, since the bass sound wave generated by the bass portion has a long wavelength, is not easy to scatter, is easy to reflect, has a good penetrating power, and has a long propagation distance, the sound wave generated by the bass portion enters the second sound guide groove 2112, and enters the waveguide sound outlet 221 after being reflected for many times, so that the treble sound wave and the bass sound wave of the first speaker 31 can form a sound wave with a plane wave shape.

Claims (9)

1. A coaxial plane wave sound is characterized in that: comprises a shell, a horn and a waveguide tube; the horn comprises a first horn and a second horn which generate sound waves with different frequencies;

a cavity is formed in the shell, a sound outlet is formed in the top of the cavity, and a mounting groove for mounting a first loudspeaker is formed in the cavity right below the sound outlet; the waveguide tube is arranged on the first horn and used for guiding the sound waves generated by the first horn; a waveguide sound outlet, a first sound wave guide channel and a second sound wave guide channel are arranged in the waveguide tube, the waveguide sound outlet and the first sound wave guide channel are positioned on the same straight line, the waveguide sound outlet and the sound outlet are correspondingly arranged, the second sound wave guide channel is arranged on two sides of the first sound wave guide channel, and first frequency sound waves transmitted to the channel by the second sound wave guide channel are mixed with second frequency sound waves transmitted by the first sound wave guide channel at the waveguide sound outlet;

the two sides of the accommodating cavity, which are positioned on the mounting groove, are respectively provided with a second loudspeaker, the side walls of the accommodating cavity, which are positioned on the two sides of the sound outlet, are provided with partition walls, propagation channels for guiding sound waves generated by the second loudspeakers are formed between the partition walls and the mounting groove and between the partition walls and the waveguide tubes, and third frequency sound waves generated by the second loudspeakers are mixed and output at the sound outlet through the propagation channels and the first frequency sound waves and the second frequency sound waves.

2. A coaxial plane wave sound according to claim 1, wherein: the waveguide tube comprises a mounting seat and a cover plate; the waveguide sound outlet is arranged at the top of the cover plate; the mounting seat comprises a mounting seat body part and a throat plug part arranged on the bottom surface of the mounting seat body part, a first sound guide groove is formed in the mounting seat body part and corresponds to the waveguide sound outlet, a through groove is formed in the throat plug part and corresponds to the first sound guide groove, and the first sound guide groove is communicated with the through groove to form a first sound wave guide channel; the through groove of the throat plug part is arranged at the position of the second frequency sound wave of the first loudspeaker correspondingly; second sound guide grooves are arranged on two sides of the first sound guide groove of the mounting seat base part and correspond to the sound outlet positions of the first frequency sound waves.

3. A coaxial plane wave sound according to claim 1, wherein: the plane of the propagation channel is vertical to the central axis of the second horn; the propagation channel is arranged obliquely upward and toward the sound outlet.

4. A coaxial plane wave sound according to claim 1, wherein: and horn bases for mounting the second horn are symmetrically formed on the partition walls on the two sides of the mounting groove.

5. A coaxial plane wave sound according to claim 2, wherein: and a longitudinal reinforcing rib plate is arranged in the waveguide sound outlet, extends from the waveguide sound outlet to the first sound guide groove, is positioned between the two second sound wave channels and divides the waveguide sound outlet into more than two sound outlet units with the same size.

6. The coaxial plane wave sound of claim 5, wherein: the cover plate is provided with sound guide parts on two sides of the waveguide sound outlet respectively, the sound guide parts are formed by upwards and inwards recessing from the bottom of the cover plate, the sound guide parts are communicated with the second sound guide grooves to form a second sound wave channel, and one side of the sound guide parts is obliquely arranged towards the waveguide sound outlet.

7. A coaxial plane wave sound according to claim 6, wherein: and more than two transverse reinforcing rib plates are arranged on the longitudinal reinforcing rib plate, and two ends of the bottom of each transverse reinforcing rib plate extend to the sound guide part respectively.

8. A coaxial plane wave sound according to claim 2, wherein: the cross-section of mount pad portion is trapezoidal, and the apron includes first plate body and the second plate body that is located first plate body both sides, and the second plate body sets up with first plate body slope.

9. A coaxial plane wave sound according to claim 1, wherein: the first horn emits the first frequency sound wave as low frequency sound wave, the first horn emits the second frequency sound wave as high frequency sound wave, and the second horn emits the middle sound or the low sound.

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