CN212752615U - Two frequency division sound box structure - Google Patents

Abstract

The utility model discloses a two frequency division audio amplifier structures, including the box, the case mouth of box is provided with first panel, and first panel link up have a plurality of jacks that are linked together in with the box, and the jack is pegged graft and is had well woofer, and first panel sets up a plurality of leading sound grooves that are linked together in with the box, and the box is provided with the second panel, and the second panel is provided with a plurality of tweeters, and well woofer's positive transaudient end is unanimous with tweeter's positive transaudient end orientation. Because the sound guide groove and the jack of the first panel are communicated with the inside of the box body, in the working process, the middle and low sound waves can be transmitted out from the front side of the middle and low sound horn, and also can be transmitted into the box body due to the relative principle of vibration, and finally transmitted out from the sound guide groove of the box body.

Description

Two frequency division sound box structure

Technical Field

The utility model relates to a technical field of audio amplifier structure, concretely relates to two frequency division audio amplifier structures.

Background

Sound is a sound wave generated by the vibration of an object, belongs to a wave, and is a wave phenomenon which is transmitted through a medium (air or solid or liquid) and can be sensed by human or animal auditory organs. The tweeter works in a relatively sharp tone range and is in a high working frequency state, the tone directionality is very strong, and the direction of the tweeter is easy to judge by human ears; the middle-tone loudspeaker relatively works in a range with moderate tone, is a loudspeaker with a sound theme part, has moderate vibration speed, is easy to distinguish when the middle-tone loudspeaker is louder, and is a main part for receiving sound information by human ears; the bass horn works in a very low tone range relatively, but is also the largest power bearing horn, the bass is the part with the largest air vibration amplitude, the touch sense can obviously feel the air vibration, but because of the field pressure with enough strength, the bass can bring the dynamic sense to people, if the bass horn does not sound, the sound is not full enough, and the ears of people are difficult to distinguish. It is known that bass sounds are difficult to distinguish from each other in the case of noise, and are one of the criteria for detecting the tone balance of a sound box.

The dichotomous sound box generally has more than two units, and the treble unit, well sound unit and bass unit are constituteed, have labyrinth, closed, phase reversal formula etc. and the box is inside to have the frequency divider, and the frequency divider divides high pitch and well bass and sends the signal into tweeter and well bass loudspeaker respectively. It is well known that stereo balance identifies the difference in gain between the left and right channels in a stereo playback system, and that if the degree of imbalance is large, the localization of the reproduced stereo sound image will be biased. The stereo balance of a typical high quality enclosure system should be less than 1 dB.

The existing dichotomous frequency sound box comprises a box body, wherein the box body is provided with a high pitch loudspeaker and a middle low pitch loudspeaker, the sound transmission end of the high pitch loudspeaker is consistent with the sound transmission end of the middle low pitch loudspeaker in orientation, and the sound of the middle low pitch loudspeaker and the sound of the high pitch loudspeaker are mutually mixed and directly radiated, so that the middle low pitch sound wave of the middle low pitch loudspeaker can be covered by the high pitch sound wave of the high pitch loudspeaker, the low pitch sound wave generated in the dichotomous frequency sound box is difficult to distinguish by human ears, and the sound effect balance of the dichotomous frequency sound box is reduced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a two frequency division sound box structure, which can enhance the tone balance effect of the two frequency division sound box.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a two frequency division audio amplifier structures, includes the box, the case mouth of box is provided with first panel, first panel link up have a plurality of with the jack that is linked together in the box, the jack is pegged graft and is had well woofer, first panel seted up a plurality of with the sound guide groove that is linked together in the box, the box is provided with the second panel, the second panel is provided with a plurality of tweeters, well woofer's positive transaudient end with the positive transaudient end orientation of tweeter is unanimous.

Further, the inner wall of the box body is fixedly connected with sound-absorbing cotton.

The first panel comprises a main connecting plate and an auxiliary connecting plate, the auxiliary connecting plate is integrally connected with the main connecting plate, the auxiliary connecting plate is arranged in a bending mode towards the inside of the box body along the direction far away from the main connecting plate, and the plurality of medium and low-pitch loudspeakers are distributed on the first panel at equal intervals along the connecting direction of the main connecting plate and the auxiliary connecting plate; the second panel pass through the connecting piece with the second panel is kept away from the end connection of box, the second panel keep away from the plane of box with the second panel is kept away from the plane of box parallel arrangement each other, and a plurality of loudspeaker follow the equidistant distribution setting of main junction plate and vice connecting plate direction of connection.

The number of the sound guide grooves is two, one of the sound guide grooves is located on the end face, far away from the box body, of the main connecting plate and communicated with the side face, far away from the auxiliary connecting plate, of the main connecting plate, and the other sound guide groove is located on the end face, far away from the box body, of the auxiliary connecting plate and communicated with the side face, far away from the main connecting plate, of the auxiliary connecting plate.

Further, the middle and low sound horn far away from the tail end of the main connecting plate on the auxiliary connecting plate is not arranged opposite to the first panel.

Furthermore, the box opening of the box body is integrally connected with blocking eaves along two edges of the connecting direction of the main connecting plate and the auxiliary connecting plate, the box opening of the box body and the edges adjacent to the blocking eaves are provided with slots, the slots are spliced with protective covers, the protective covers are positioned between the blocking eaves and are in butt joint with the blocking eaves, the protective covers are connected with the box body through connecting pieces, the protective covers are arranged right opposite to the first panel, the planes of the protective covers facing the first panel and the planes of the first panel are parallel to each other, the cross sections of the protective covers perpendicular to the connecting direction of the main connecting plate and the auxiliary connecting plate are in arc-shaped arrangement, arc-shaped openings of the protective covers face the first panel, and a plurality of sound transmission holes are formed through the protective covers.

Furthermore, the second panel is opposite to the first panel, the second panel is located on one side, away from the box body, of the first panel, and the plurality of tweeters are opposite to the plurality of mid-woofers.

Furthermore, a plurality of openings are communicated with one side of the second panel, which faces the first panel, the openings are communicated with the adjacent side edges of the second panel, the openings are arranged in a circular arc shape, the adjacent side edges of the openings, which are close to the second panel, are gradually enlarged, connecting blocks are integrally connected between the adjacent openings on the side surfaces of the second panel, and the connecting blocks are connected with the end surfaces, which are far away from the box body, of the first panel through connecting pieces.

Further, the second panel is kept away from the terminal surface of box is run through and is had a plurality of confessions the mounting groove that loudspeaker pegged graft, loudspeaker's sound transmission end size is less than well loudspeaker sound transmission end size, and is adjacent loudspeaker is close to the setting each other, the mounting groove is kept away from the notch of box one side is connected with the high pitch cylindric piece, the high pitch cylindric piece pass through the connecting piece simultaneously with the second panel with loudspeaker connects, the high pitch cylindric piece run through have with loudspeaker's sound transmission end just right passageway, the logical groove cross-section of high pitch cylindric piece is along keeping away from loudspeaker one side enlarges the setting gradually.

Furthermore, the end faces of the plurality of tweeters close to the box body are connected with the same strip-shaped plate through connecting pieces.

The utility model discloses following beneficial effect has:

1. a sound wave is generated by vibration (vibration) of a loudspeaker, and according to the relative principle of vibration, the front sound transmission end of the loudspeaker can directly receive the corresponding sound wave, so that the back of the loudspeaker can generate the same vibration sound wave. The sound guide groove and the jack of the first panel are communicated with the inside of the box body, and the medium and low-pitched horn is installed with the jack in an inserting mode, so that the front face of the medium and low-pitched horn faces the outside of the box body, and the back face of the medium and low-pitched horn faces the inside of the box body. In addition, the front sound transmission end of the middle and low sound horn and the front sound transmission end of the high sound horn are arranged to face towards the same direction, so that the sound transmission direction of the whole sound box is the same, and a user can experience the sound wave effect sent by the sound box conveniently.

2. Through set up at the box inner wall and inhale the sound cotton, owing to inhale the hand midtone sound wave and the high pitch sound wave that the sound cotton can be good for only there is the bass sound wave in the box, consequently follows the sound wave that the leading note groove spreads for the vast majority be the bass sound wave, and then reach the balanced effect of reinforcing tone quality.

3. The middle and low sound horn generates middle and low sound in the box body according to the relative vibration principle, the middle and low sound and the high sound are absorbed by the sound absorption cotton, the low frequency sound is transmitted from the sound guide grooves on the upper and lower sides, the sound color with balanced upper and lower parts can be synchronously pushed out, the sound color balance can be enhanced due to the influence of a conventional forward direct-injection structure, and the practical use effect is better.

4. When the second panel is connected with the first panel, the second panel and the first panel are arranged in a J-like shape, so that the midbass sound waves generated by the midbass loudspeaker positioned on the main connecting plate are propagated along the horizontal direction vertical to the plane of the main connecting plate, the middle bass sound wave generated by the middle bass loudspeaker positioned on the auxiliary connecting plate is propagated to one side far away from the box body along the curved arc surface vertical to the auxiliary connecting plate, so that the propagation range of the middle bass sound wave is enlarged, in addition, because the second panel and the first panel are opposite and parallel to each other, the high pitch sound wave generated by the high pitch loudspeaker opposite to the main connecting plate can also vertically spread along the plane vertical to the main panel, the high pitch sound wave generated by the high pitch loudspeaker opposite to the auxiliary connecting plate can be transmitted to the side far away from the box body, so that the sound wave can be projected towards a fixed direction. Therefore, the sound column generated by the whole sound box can project along the fixed direction according to the J-shaped bending condition of the first panel, the two bass units directly opposite to the main connecting plate of the sound column project along the straight forward direction, and the other two bass units directly opposite to the auxiliary connecting plate of the sound column have wider vertical projection angles.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Fig. 4 is an exploded view of the axial viewing angle of the present invention.

Fig. 5 is an exploded view of another axial side view of the present invention.

Fig. 6 is a partially enlarged view of B in fig. 4.

Fig. 7 is a partial enlarged view at C in fig. 5.

Fig. 8 is a sound wave trace simulation diagram of the alto-woofer and the tweeter of the present invention.

In the figure: 1. a box body; 11. blocking eaves; 12. a slot; 13. sound-absorbing cotton; 2. a first panel; 21. a main connection plate; 22. a secondary connecting plate; 23. a sound guide groove; 24. a jack; 25. a mid-bass loudspeaker; 3. a second panel; 31. an opening; 32. connecting blocks; 33. mounting grooves; 34. a high-pitch cylindrical block; 35. a tweeter; 36. a strip plate; 4. a protective cover; 41. a sound transmission hole.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments. In the present specification, the terms "upper", "inner", "middle", "left", "right" and "one" are used for convenience of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the corresponding parts may be changed or adjusted without substantial technical changes.

Referring to fig. 1 to 5, a two-frequency-division sound box structure, including being long banding box 1, first panel 2 is installed in the case mouth grafting of box 1, the terminal surface that first panel 2 kept away from box 1 link up there are a plurality of jacks 24, the quantity of jack 24 in this embodiment is four, jack 24 is pegged graft and is had well woofer 25, well woofer 25 attaches with first panel 2 lock through the screw and is connected, the terminal surface that first panel 2 kept away from box 1 is seted up a plurality of sound guide grooves 23 that communicate in with box 1, second panel 3 is installed to box 1, a plurality of tweeters 35 are installed to second panel 3, the quantity of woofer 35 in this embodiment is ten, the positive sound transmission end of well woofer 25 is unanimous with the positive sound transmission end orientation of tweeter 35.

Specifically, because the horn generates sound waves through vibration (vibration), according to the relative principle of vibration, the front sound transmission end of the horn can directly receive corresponding sound waves, and the back of the horn can also generate the same vibration sound waves. Because the sound guide groove 23 and the jack 24 of the first panel 2 are communicated with the interior of the box body 1, and the midbass loudspeaker 25 is inserted and installed with the jack 24, the front surface of the midbass loudspeaker 25 faces the exterior of the box body 1, and the back surface of the midbass loudspeaker 25 faces the interior of the box body 1, therefore, during the operation of the midbass speaker 25, the midbass sound wave is transmitted from the front of the midbass speaker 25, and due to the relative principle of vibration, so that the middle and low sound wave generated by the back of the middle and low sound loudspeaker 25 is transmitted into the box body 1 and finally is transmitted out from the sound guide groove 23 of the box body 1, therefore, the user can be according to the demand, through setting up the position of leading the sound groove 23 for the well bass audio that spreads in leading the sound groove 23 is obvious, reduces tweeter 35's high pitch interference, and the balanced effect of reinforcing tone quality for the stereo set of direct-projection conventional structure among the prior art, can strengthen tone quality balance, and the in-service use effect preferred.

Referring to fig. 4 and 5, since sound is propagated in the form of waves, treble sound waves from the tweeter 35 are more or less transmitted into the housing 1 through the insertion hole 24, so that the housing 1 is more or less mixed with treble sound waves when the speaker is operated. Meanwhile, the medium and low tone loudspeaker 25 integrates bass and medium sound effects, medium sound waves and bass sound waves can exist in the box body 1 according to the relative vibration principle, and the medium sound waves, the high sound waves and the low sound waves generated in the box body 1 are well separated so as to further highlight the bass sound effect of the medium and low tone loudspeaker 25 and further improve the balance of the sound effect of the sound box. The inner wall of box 1 has all laid the sound cotton 13 of inhaling of absorbing medium pitch sound wave and high pitch sound wave, inhales sound cotton 13 and splices through fixed glue and box 1 inner wall. Therefore, when the sound box works, the sound absorption cotton 13 can well wash the middle-pitch sound waves and the high-pitch sound waves, so that only the bass sound waves exist in the box body 1, most of the sound waves transmitted from the sound guide groove 23 are the bass sound waves, and the effect of enhancing the tone balance is achieved.

Referring to fig. 4 to 8, in order to make the sound transmission direction of the entire cabinet substantially uniform, the front sound transmission end of the woofer 25 and the front sound transmission end of the tweeter 35 are oriented in the same direction, and in order to further concentrate the sound waves generated when the tweeter 35 and the woofer 25 operate, the sound waves generated in the entire cabinet are made uniform in direction, and the sound color effect of the cabinet is improved. First panel 2 is the setting of type "J" type, first panel 2 is rectangular form, first panel 2 is made by aluminum alloy material, can carry out intensity and buckle, the length direction of first panel 2 is unanimous with the length direction of box 1, the length direction of second panel 3 is unanimous with the length direction of first panel 2, second panel 3 is just right each other with first panel 2, second panel 3 is located one side that box 1 was kept away from to first panel 2, a plurality of loudspeaker 35 are just right each other with a plurality of well woofer 25.

Referring to fig. 4 to 8, in order to reduce the obstruction of the first panel 2 by the second panel 3, the sound transmission of the midbass speaker 25 on the first panel 2 is blocked. A plurality of openings 31 are penetrated on one side of the second panel 3 facing the first panel 2, a plurality of openings 31 are equally divided along the length direction vertical to the second panel 3 and are arranged at two sides of a plurality of tweeters 35, the openings 31 at two sides along the length direction vertical to the second panel 3 are arranged oppositely, the openings 31 are communicated with the second panel 3 along the edge of the adjacent side edge vertical to the length direction, the openings 31 are arranged in a circular arc shape, the openings 31 are gradually enlarged along the edge of the adjacent side edge close to the second panel 3, the second panel 3 is arched along the middle part vertical to the length direction and faces one side far away from the box body 1, because the distance between the second panel 3 and the first panel 2 is increased, a larger installation space is provided for installing the tweeter 35, the side surface of the second panel 3 is positioned between the adjacent openings 31 and is integrally connected with the connecting block 32, and the connecting block 32 is in locking attachment connection with the end surface of the first panel 2 far away from the box body 1 through screws. Specifically, the midbass sound waves generated at the front sound transmission end of the midbass loudspeaker 25 are propagated outwards through the opening 31, so that the blockage of the second panel 3 is reduced. In addition, because the second panel 3 is made by aluminium alloy material, and the second panel 3 is the setting of class "J" type, consequently, when the connecting block 32 of second panel 3 passes through the screw and is connected with the first panel 2 lock attachedly, the whole radian of second panel 3 can be along with the first panel 2 keeps away from the corresponding bending of the radian of the terminal surface of box 1 to the direction of transfer of sound wave provides the guide effect in the time of follow-up woofer 25 and the work of tweeter 35.

Referring to fig. 4 to 8, in order to realize the asymmetric beam projection pointing technique of the high tone horn 35 and the mid-bass horn 25 in the cabinet, it is shown. The first panel 2 comprises a main connecting plate 21 and an auxiliary connecting plate 22, the main connecting plate 21 is arranged in a long strip shape, the auxiliary connecting plate 22 is integrally connected with one end of the main connecting plate 21 along the length direction, the auxiliary connecting plate 22 is arranged in a bending mode towards the interior of the box body 1 along the direction far away from the main connecting plate 21, so that the first panel 2 is arranged in a J-shaped mode, and a plurality of jacks 24 are distributed on the end face, far away from the box body 1, of the first panel 2 at equal intervals along the connecting direction of the main connecting plate 21 and the auxiliary connecting plate 22, wherein the connecting direction of the main connecting plate 21 and the auxiliary connecting plate 22 is the length direction of the main connecting plate 21, so that a plurality of medium and low sound loudspeakers 25 are distributed on the first panel 2 at equal intervals; the length of second panel 3 is greater than the length of main connecting plate 21 and is less than the whole length of first panel 2, when the connecting block 32 of second panel 3 passes through the terminal surface lock attachement of screw and first panel 2 keeping away from box 1 and is connected, because the section bar material of second panel 3, cause the whole radian of second panel 3 to produce corresponding bending along with the terminal surface radian that box 1 was kept away from to first panel 2, so that the plane that box 1 was kept away from to second panel 3 and the plane that box 1 was kept away from to second panel 3 parallel arrangement each other, a plurality of high pitch horns 35 set up along main connecting plate 21 and the equidistant distribution of vice connecting plate 22 direction. Two of the midrange woofers 25 are located on the main connecting plate 21, and the other two midrange woofers 25 are located on the auxiliary connecting plate 22.

In particular, when the second panel 3 is connected with the first panel 2, the second panel 3 and the first panel 2 are arranged in a J-like shape, so that the midbass sound waves generated by the midbass horn 25 located on the main web 21 propagate in a horizontal direction perpendicular to the plane of the main web 21, and the bass sound wave generated by the bass loudspeaker 25 positioned on the auxiliary connecting plate 22 propagates along the side which is perpendicular to the bending arc surface of the auxiliary connecting plate 22 and is far away from the box body 1, so that the propagation range of the bass sound wave is enlarged, and in addition, since the second panel 3 is in parallel with the first panel 2 facing each other, the tweeter 35 facing the main web 21 will also produce a tweeter sound wave propagating vertically perpendicular to the main panel plane, the tweeter 35, which is opposite the sub-link plate 22, generates a tweeter sound wave that is also propagated away from the outside of the housing 1, so that the sound wave is projected in a fixed direction. Therefore, the sound column generated by the whole sound box can project along a fixed direction according to the J-shaped bending condition of the first panel 2, two bass units of the sound column, which are opposite to the main connecting plate 21, project directly to the right front, and the other two bass units, which are opposite to the auxiliary connecting plate 22, have wider vertical projection angles. With the aid of ten treble units, more sound can be transmitted to the far-range audience seats relative to the near-range audience seats, so that the far-range audience seats have enough sound pressure levels without making the near-range sound pressure levels too high, more uniform sound pressure is provided in the coverage range of the sound column, and each audience can hear the sound with the same size. In addition, the sound column can provide consistent frequency response and suppress side lobe effect, so that each audience can hear sound with the same quality, and the constant wave width technology is met.

Referring to fig. 4 to 8, in order to reduce the situation where the direction in which the mid-bass speaker 25 propagates at a fixed angle completely coincides with the direction in which the tweeter 35 propagates, the mid-bass sound wave and the tweeter sound wave completely overlap to lower the balance. The mid-bass loudspeakers 25 far away from the tail end of the main connecting plate 21 on the auxiliary connecting plate 22 are not arranged opposite to the first panel 2, so that the four mid-bass loudspeakers 25 of the first panel 2 can be propagated along a fixed direction, and particularly, the two mid-bass loudspeakers 25 positioned on the auxiliary connecting plate 22 can be perpendicular to the plane of the auxiliary connecting plate 22, so that the effect of expanding the propagation angle is achieved. In addition, the part of the second panel 3 facing the auxiliary connecting plate 22 is small, but the effect of expanding the propagation angle of the tweeter 35 can still be realized due to the large number of the tweeters 35, and the sound effect balance of the sound box can be enhanced by mainly using medium and low sound waves at the tail end along the length direction.

Referring to fig. 4 to 8, the cabinet 1 is attached to a fixed member such as a wall or a shelf by a connector such that the sub-link 22 is positioned below the main link 21. The number of the sound guide grooves 23 is two, one sound guide groove 23 is located on the end face of the main connecting plate 21 far away from the box body 1 and communicated with the side face of the main connecting plate 21 far away from the auxiliary connecting plate 22, and the other sound guide groove 23 is located on the end face of the auxiliary connecting plate 22 far away from the box body 1 and communicated with the side face of the auxiliary connecting plate 22 far away from the main connecting plate 21. Specifically, the medium and low-pitched sound generated by the medium and low-pitched sound horn 25 in the box body 1 based on the relative vibration principle is transmitted from the sound guide grooves 23 at the upper and lower parts after the medium-pitched sound waves and the high-pitched sound waves are absorbed by the sound absorption cotton 13, so that the vertically balanced timbre can be synchronously pushed out, and the timbre balance can be enhanced and the actual use effect is better compared with the conventional forward direct-injection structure influence.

Referring to fig. 1 to 5, in order to reduce the possibility of damage to the woofer 25 and the tweeter 35 due to leakage, the sound column of the cabinet can be gathered and then discharged from one side. Box 1 has along length direction's two border homogeneous body couplings and keeps off eaves 11, box 1's case mouth has seted up slot 12 with the border that keeps off eaves 11 adjacent, slot 12 is pegged graft and has protection casing 4, protection casing 4 is located two keep off between the eaves 11 and with keep off eaves 11 butt joint each other, protection casing 4 covers and surrounds second panel 3 and ten loudspeaker 35 settings, protection casing 4 attaches with the side lock of box 1 through the screw and is connected, protection casing 4 is just to setting up with first panel 2, protection casing 4 is towards the plane of first panel 2 and the mutual parallel arrangement in first panel 2 plane, protection casing 4 perpendicular to main junction plate 21 and vice connecting plate 22 joint direction cross-section are the arc setting, the arc opening 31 of protection casing 4 sets up towards first panel 2, protection casing 4 has a plurality of sound conduction holes 41 to be link up, so that the sound column of box 1 spreads out through sound conduction hole 41.

Referring to fig. 4 to 8, in order to the high pitch unit of compression tweeter 35 that can be good, the terminal surface that box 1 was kept away from to second panel 3 has been link up the mounting groove 33 that has a plurality of high pitch horns 35 to peg graft, the sound conduction end size of tweeter 35 is less than the sound conduction end size of well woofer 25, adjacent tweeter 35 is close to the setting each other, the notch that box 1 one side was kept away from to mounting groove 33 is connected with high tone section of thick bamboo piece 34, high tone section of thick bamboo piece 34 passes through the screw and is connected with second panel 3 and tweeter 35 lock additional simultaneously, high tone section of thick bamboo piece 34 link up have with the just right passageway of sound conduction end of tweeter 35, the logical groove cross-section of high tone section of thick bamboo piece. Specifically, due to the arrangement of the treble cone block 34, the projection angle of the treble unit is compressed, the sound energy is more concentrated, and the sound pressure level is increased by 3dB in the corresponding projection angle range.

In order to further improve the stability of the installation of the plurality of tweeters 35, the loose installation of the adjacent tweeters 35 is reduced. The end faces of the tweeters 35 close to the box body 1 are additionally connected with a strip-shaped plate 36 through screw locking, and the length direction of the strip-shaped plate 36 is consistent with that of the box body 1.

The embodiment of the present invention is not limited to this, according to the above-mentioned content of the present invention, the common technical knowledge and the conventional means in the field are utilized, without departing from the basic technical idea of the present invention, the present invention can also make other modifications, replacements or combinations in various forms, all falling within the protection scope of the present invention.

Claims (10)

1. The utility model provides a frequency-halving sound box structure which characterized by: the power distribution box comprises a box body, the case mouth of box is provided with first panel, first panel link up have a plurality of with the jack that is linked together in the box, the jack is pegged graft and is had well woofer, first panel seted up a plurality of with the sound guide groove that is linked together in the box, the box is provided with the second panel, the second panel is provided with a plurality of tweeters, well woofer's positive transaudient end with the positive transaudient end orientation of tweeter is unanimous.

2. The structure of claim 1, wherein: the inner wall fixedly connected with of box inhales the sound cotton.

3. The structure of claim 1, wherein: the first panel comprises a main connecting plate and an auxiliary connecting plate, the auxiliary connecting plate is integrally connected with the main connecting plate, the auxiliary connecting plate is arranged in a bending mode towards the inside of the box body along the direction far away from the main connecting plate, and the plurality of medium and low sound loudspeakers are distributed on the first panel at equal intervals along the connecting direction of the main connecting plate and the auxiliary connecting plate; the second panel pass through the connecting piece with the second panel is kept away from the end connection of box, the second panel keep away from the plane of box with the second panel is kept away from the plane of box parallel arrangement each other, and a plurality of loudspeaker follow the equidistant distribution setting of main junction plate and vice connecting plate direction of connection.

4. A two-frequency-division sound box structure according to claim 3, wherein: the number of the sound guide grooves is two, one sound guide groove is located on the end face, far away from the box body, of the main connecting plate and communicated with the side face, far away from the auxiliary connecting plate, of the main connecting plate, and the other sound guide groove is located on the end face, far away from the box body, of the auxiliary connecting plate and communicated with the side face, far away from the main connecting plate, of the auxiliary connecting plate.

5. A two-frequency-division sound box structure according to claim 3, wherein: the middle and low sound horn far away from the tail end of the main connecting plate on the auxiliary connecting plate is not arranged opposite to the first panel.

6. A two-frequency-division sound box structure according to claim 3, wherein: the utility model discloses a protection casing, including main connecting plate and auxiliary connecting plate, the box mouth of box is followed two border homogeneous body coupling of main connecting plate and auxiliary connecting plate direction of connection have and keep off the eaves, the box mouth of box with the adjacent border of keeping off the eaves has seted up the slot, the slot is pegged graft there is the protection casing, the protection casing is located two keep off between the eaves and with keep off the eaves and dock each other, the protection casing pass through the connecting piece with the box is connected, the protection casing with first panel is just to setting up, the protection casing orientation the plane of first panel with first panel plane parallel arrangement each other, the protection casing perpendicular to main connecting plate and auxiliary connecting plate direction cross-section are the arc setting, the arc opening orientation of protection casing first panel setting, the protection casing is run through there.

7. The structure of claim 1, wherein: the second panel is opposite to the first panel, the second panel is located on one side, away from the box body, of the first panel, and the high pitch horns are opposite to the middle and low pitch horns.

8. The structure of claim 7, wherein: the second panel orientation one side of first panel link up there is a plurality of openings, the opening with the adjacent side border of second panel is linked together, the opening is circular-arc setting, the opening is along being close to the adjacent side border of second panel enlarges the setting gradually, the side of second panel is located an organic whole and is connected with the connecting block between the adjacent opening, the connecting block pass through the connecting piece with first panel is kept away from the terminal surface of box is connected.

9. The structure of claim 1, wherein: the utility model discloses a loudspeaker box, including box, second panel, loudspeaker, mounting groove, connecting piece, second panel, loudspeaker, mounting groove, loudspeaker's sound transmission end size is less than well loudspeaker sound transmission end size, and is adjacent loudspeaker are close to the setting each other, the mounting groove is kept away from the notch of box one side is connected with the high pitch section of thick bamboo piece, the high pitch section of thick bamboo piece pass through the connecting piece simultaneously with the second panel with loudspeaker connects, the high pitch section of thick bamboo piece link up have with loudspeaker's sound transmission end just right passageway, the logical groove cross-section of high pitch section of thick bamboo piece is along keeping away from loudspeaker one side enlarges the setting gradually.

10. The structure of claim 9, wherein: a plurality of loudspeaker are close to the terminal surface of box is connected with same shaped plate through the connecting piece.

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