CN106507254B

CN106507254B - Loudspeaker horn

Info

Publication number: CN106507254B
Application number: CN201611082851.0A
Authority: CN
Inventors: 唐永均
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-11-30
Filing date: 2016-11-30
Publication date: 2022-07-08
Anticipated expiration: 2036-11-30
Also published as: CN106507254A

Abstract

The invention relates to the technical field of sound products, in particular to a loudspeaker horn. The loudspeaker horn comprises at least two horn units which are connected with each other, each horn unit comprises a horn-shaped shell, the large end of each shell is a face plate, each shell comprises a throat pipe arranged at the small end of the shell, a plurality of manifolds are fixedly arranged in the throat pipes, and the manifolds are communicated with two ports of the throat pipes. The invention greatly improves the upper limit frequency of the horn.

Description

Loudspeaker horn

Technical Field

The invention relates to the technical field of sound equipment products, in particular to a loudspeaker horn.

Background

In the design of a traditional three-frequency-division loudspeaker system, a high-frequency driver is often adopted, a three-frequency-division full-frequency sound box is formed by a medium-frequency driver and a low-frequency unit, and the high-frequency driver and the medium-frequency driver can carry a split or connected medium-high-frequency horn to be matched with the low-frequency unit so as to project sound waves reproduced by the high-frequency driver and the medium-frequency driver to a use space.

According to the acoustic theory, sound waves are reflected and interfered, and when the vibrating diaphragms of the high-frequency driver and the medium-frequency driver do piston motion in the front and back directions, the generated sound waves are radiated outwards through the horn throats to form sound. However, not all sound waves are directly diffused outward, and some sound waves are transmitted to the ears of the listener after being reflected by the reflecting surface of the horn. In a conventional horn, the sound waves would be reflected to the other side before being reflected to the listener. Since the sound waves are generated at the same time but heard at different times, the process and the sound waves generated by the diaphragm generate a sound wave interference phenomenon again, and thus standing wave distortion is formed. And the phase plug can rapidly emit secondary reflection waves, so that the delay time is reduced.

The phase plug can effectively improve the frequency response characteristic, prevent standing waves and cross-over distortion, enable the off-axis frequency response diffusion characteristic and the axial frequency response diffusion characteristic to be smoother, and avoid the off-axis frequency response peak valley phenomenon frequently appearing in a horn. That is, the existence of the phase plug can effectively improve the phase performance of the loudspeaker, which is the name of the phase plug.

At present, a housing unit carried by a high-frequency driver or a medium-frequency driver is generally in an eight shape, a joint of a horn unit and the driver is a round hole and is generally called as a horn throat (throat), and a housing of each horn unit is generally extended outwards to a large opening (face plate) of the horn housing from the horn throat according to a certain line shape. The horns used by high-frequency drivers and medium-frequency drivers on the market generally have no phase plugs or only use simple bullet phase plugs, and the bullet phase plugs only have certain positive effects on a circumference uniform type splayed horn shell, and when the horn shell is in other shapes, the horn shell can not meet the requirements.

In addition, in the prior art, the upper limit frequency of a horn connected with a high-frequency driver is only 16.5kHz, and a certain distance is required between the horn and the upper limit frequency of 20kHz required by high quality; the lower limit frequency of the horn connected to the high frequency driver is also not sufficient.

In view of the above deficiencies of connecting horn high frequency drivers used in the existing market, it is necessary to invent a horn with more excellent performance in order to manufacture a more excellent speaker system.

Disclosure of Invention

In order to solve the technical problems, the invention provides the loudspeaker horn which can improve the upper limit frequency of the horn, expand the lower limit frequency and reduce the sound wave transmission distortion.

In order to realize the technical effect of the invention, the following technical scheme is adopted for realizing the technical effect:

a loudspeaker horn comprises at least two horn units which are connected with each other, each horn unit comprises a horn-shaped shell, the large end of each shell is a face plate, each shell comprises a throat pipe arranged at the small end of the shell, a plurality of manifolds are fixedly arranged in the throat pipes, and the manifolds are communicated with two ports of the throat pipes.

As a further improvement, the horn units are two horn units, namely a high-frequency horn and a medium-frequency horn fixedly arranged on one side of the high-frequency horn.

As a further improvement, a phase plug is arranged in the shell, and the phase plug is partially arranged in the throat pipe.

As a further improvement, the high-frequency horn comprises a flow director for splitting the sound waves of the high-frequency driver; the high-frequency horn further comprises a mounting seat connected with the small end of the shell; one part of the fluid director is arranged in the high-frequency horn throat pipe, and the other part of the fluid director is arranged outside the high-frequency horn shell and extends into a throat groove of the high-frequency driver when the high-frequency horn shell is connected with the high-frequency driver; the manifold of the high-frequency horn is tightly distributed on the periphery of the fluid director; the phase plug of the high-frequency horn is tightly attached to one end, close to the face disc, of the fluid director.

As a further improvement, the part of the fluid director extending out of the shell is conical, and when the shell of the high-frequency horn is connected with the high-frequency driver, the small head of the shell is arranged in the throat groove, and the large head is close to the throat pipe of the high-frequency horn; when the shell of the high-frequency horn is connected with the high-frequency driver, the manifold of the high-frequency horn is communicated with the throat groove of the high-frequency driver.

As a further improvement, the outer wall of the shell is also provided with a reinforcing rib for resonance elimination in a clinging manner.

As a further improvement, the top of the shell is also provided with a horn resonance reduction type position; the manifold is in the form of a streamlined curve.

As a further improvement, the cross section of the shell is quadrilateral; the phase plug becomes thinner gradually from bottom to top, the front side and the rear side are in a slope shape, the projections of the left side and the right side in the vertical direction are in a streamline shape, and the top end of the phase plug is in an arc shape; each side of the phase plug corresponds to a side of a quadrilateral.

As a further improvement, the intermediate frequency horn further comprises horn diffusion lobes with irregular and asymmetric structures for eliminating comb waves in the intermediate frequency horn housing; and a driver compression cap is further arranged in the throat pipe of the medium-frequency horn, and the manifold arranged in the throat pipe is tightly attached and distributed on the periphery of the driver compression cap.

As a further improvement, the intermediate-frequency horns further comprise parasitic secondary wave angles with a symmetrical and nonparallel structure arranged on the inner wall of the intermediate-frequency horn housing and inserted between two adjacent manifolds.

The invention has the following beneficial effects:

1) according to the invention, the upper limit frequency of the horn can be greatly improved by arranging the manifold.

2) The phase plug is additionally arranged on the reflecting surface of the shell (the expansion part), so that standing waves and cross distortion can be prevented, the off-axis frequency response diffusion characteristic and the on-axis frequency response diffusion characteristic are smoother, the off-axis frequency response peak valley phenomenon frequently occurring in the horn is avoided, and the horn sound is greatly reduced.

3) The high-frequency driver is provided with the flow guider, so that the size and specification of the horn throat pipe are generally consistent with those of the sound-producing throat pipe and can be matched, but the horn in the prior art is not provided with the horn flow guider, namely, the horn is a straight throat, sound focusing can be generated when the sound wave capacity is too large or too small, namely, sound wave air explosion (horn sound) is generated when the sound wave capacity is too large, and sound nodes are separated from a bass unit when the sound wave capacity is too small, so that the defect of low bass or low treble is generated.

4) The strengthening rib and the horn resonance that set up and be used for going the resonance subdue the type position, make the intensity greatly increased of horn, very big has reduceed the mechanical oscillation of during operation horn, make the sound wave output of horn more stable.

Drawings

FIG. 1 is a schematic view of a horn configuration of the loudspeaker of the present invention;

FIG. 2 is a schematic view of another embodiment of a loudspeaker horn according to the present invention;

FIG. 3 is a schematic diagram of the external side view of the horn of the speaker of the present invention;

FIG. 4 is a diagram of horn to high frequency driver and medium frequency driver connections;

FIG. 5 is a schematic top view of a speaker horn according to the present invention;

FIG. 6 is a cross-sectional view C-C of FIG. 5;

FIG. 7 is a sectional view A-A of FIG. 5;

FIG. 8 is a cross-sectional view B-B of FIG. 5;

FIG. 9 is a schematic diagram of a mid-frequency horn section;

FIG. 10 is a schematic diagram of the structure of a high frequency horn section;

wherein 1 is a bugle reflecting surface; 2 is a horn diffusion flap; 3 is manifold II; 4 is manifold I; 5 is the parasitic minor horns; 6 is a medium frequency horn; 7 is a phase plug arranged at a medium frequency horn; 8 is a medium-high frequency horn coherent arc surface; 9 is a high frequency horn; 10 is a phase plug provided at a high frequency horn; 11 is a manifold provided at a high frequency horn; 12 is a high frequency horn and low frequency horn inlay and arc position; 13 is a horn resonance abatement mode bit; 14 is the mid frequency driver compression cap; 15 is the mid frequency driver lock position; 16 is a flow guide; 17 is a high frequency horn throat; 18 is a high frequency driver locking hole; 19 is a reinforcing rib; 20 is a housing; 21 is a dough disk; 22 is a mounting seat; 23 is a high frequency driver; 24 is a throat groove; and 25 is a mid-frequency driver.

Detailed Description

Embodiments of the present invention are described in detail below with reference to the accompanying drawings.

A loudspeaker horn comprises at least two horn units which are connected with each other, each horn unit comprises a horn-shaped shell 20, the large end of the shell 20 is a face plate 21, the shell 20 comprises a throat pipe arranged at the small end of the shell, a plurality of manifolds are fixedly arranged in the throat pipe, and the manifolds are communicated with two ports of the throat pipe. According to the invention, the upper limit frequency of the horn can be greatly improved by arranging the manifold.

Preferably, the horn units are two horn units, namely a high-frequency horn 9 and a medium-frequency horn 6 fixedly arranged on one side of the high-frequency horn 9. The number of manifolds located in the high frequency horn may be twelve, and the number of manifolds located in the medium frequency horn may also be twelve. The manifold is arranged, the upper limit frequency of the high-frequency horn 9 can be raised to be above 30kHz, and the upper limit frequency of the medium-frequency horn 6 can be raised to be above 8 kHz. The high-frequency horn and the low-frequency horn can be connected at the top, and the connecting surface can be a medium-high frequency horn coherent cambered surface 8.

Preferably, a phase plug is also disposed within the housing 20, the phase plug being partially disposed within the throat. The phase plug is additionally arranged on one side of the shell close to the reflecting surface 1, so that standing waves and cross-over distortion can be prevented, the off-axis frequency response diffusion characteristic and the axial frequency response diffusion characteristic are smoother, the off-axis frequency response peak valley phenomenon frequently occurring in the horn is avoided, and the horn sound is greatly reduced.

Preferably, the high frequency horn comprises a flow director 16 for splitting the sound waves of the high frequency driver 23; the high-frequency horn 9 further comprises a mounting seat 22 connected with the small end of the shell; one part of the fluid director is arranged in the high-frequency horn choke 17, and the other part of the fluid director is arranged outside the high-frequency horn shell 20 and extends into the throat groove 24 of the high-frequency driver 23 when the high-frequency horn shell is connected with the high-frequency driver 23; the high-frequency horn manifold 11 is closely distributed on the periphery of the fluid director 16; the phase plug of the high-frequency horn 9 is tightly attached to one end of the flow guider 16 close to the face plate. The mounting 22 may be integrally formed with the housing of the high frequency horn. The high-frequency driver is closely attached to the small end of the shell.

Preferably, the part of the fluid director 16 extending out of the shell is conical, and when the shell of the high-frequency horn 9 is connected with the high-frequency driver, the small end of the fluid director is arranged in the throat groove 24, and the large end of the fluid director is close to the throat 17 of the high-frequency horn; the manifold 11 of the high frequency horn 9 communicates with the throat 24 of the high frequency driver 23.

The sound waves, which may be high frequency drivers 23, first enter the throat 24 and are split by the flow director 16 and then exit the manifold 11. Of course, when the housing of the mid-frequency horn is connected to the mid-frequency driver, the sound waves of the mid-frequency horn can be transmitted from the manifold II and the manifold I.

The flow guider 16 is conical (the part arranged outside the shell is conical), so that sound waves can be better divided. The end of the flow guider near the face disc is provided with an embedding position (groove), the phase plug is partially inserted into the embedding position (groove), and the phase plug is arranged at the top of the manifold. The phase plug is arranged at the top of the manifold, so that the sound wave turbulence can be reduced, the distortion can be reduced, the sound wave transmission efficiency can be improved, and the sound wave loss can be reduced. Or the part of the fluid director arranged outside the shell is conical, and the part of the fluid director arranged inside the shell is cylindrical, so that the installation is easier. The manifolds may be evenly distributed around the periphery of the phase plug.

Preferably, the outer wall of the housing 20 is also provided with a reinforcing rib 19 for resonance elimination in a close fit manner. The reinforcing ribs are preferably triangular in shape, so that the reinforcing ribs are more stable.

Preferably, the top of the housing is also provided with a horn resonance damping type position 13. The horn resonance abatement type sites may be protrusions or/and recesses provided in the top of the housing.

The strengthening rib and the horn resonance that set up and be used for going the resonance subdue the type position, make the intensity greatly increased of horn, and then very big mechanical vibration who has reduceed the during operation horn, make the sound wave output of horn more stable.

Preferably, the manifold is in the form of a streamlined curve. And further has the effects of small wind resistance and low interference.

Preferably, the cross section of the housing is quadrilateral; the phase plug becomes thinner gradually from bottom to top, the front side and the rear side are in a slope shape, the projections of the left side and the right side in the vertical direction are in a streamline shape, and the top end of the phase plug is in an arc shape; each side of the phase plug corresponds to a side of a quadrilateral. Each side of the phase plug corresponding to a side of a quadrilateral means that a ramp of the phase plug is opposite an inner wall of the housing. Thus, the sound transmitted from the high-frequency driver passes through the phase plug with the structure, so that the loss of the energy of the sound can be remarkably reduced, and the transmission efficiency of the sound can be improved. Of course, the sides of the quadrangle can be arcs, and the corners of the quadrangle can be chamfers.

Preferably, the medium-frequency horn further comprises horn diffusion lobes 2 with irregular and asymmetric structures for eliminating comb waves in the medium-frequency horn housing; and a driver compression cap 14 is also arranged in the throat pipe of the intermediate frequency horn 6, and a manifold arranged in the throat pipe of the intermediate frequency horn is tightly attached and distributed on the periphery of the driver compression cap 14. The driver compression cap prevents sound waves generated by the dust cap of the medium frequency driver from directly emitting to the end face of the horn housing. Therefore, the sound wave generated by the dust cap and the sound wave generated by the diaphragm of the medium-frequency driver can reach the horn end face in equal time.

Preferably, the intermediate frequency horn further comprises a spurious secondary wave angle 5 having a symmetrical and nonparallel structure provided on an inner wall of the intermediate frequency horn housing and inserted between two adjacent manifolds. The spurious secondary wave eliminating horn is added for the medium-frequency horn, the pleasant even secondary wave hearing degree is improved, and the fullness of the conveyed clear sound of the medium-frequency horn is improved. The manifold arranged in the medium-frequency horn can be composed of a manifold II 3 and a manifold I4 which are communicated with each other.

It should be noted that the top, up, and down of the present invention refer to the top, up, and down when placed in the position shown in fig. 3.

However, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, which is intended to cover all the modifications and equivalents of the claims and the specification. In addition, the abstract and the title are provided to assist the patent document searching and are not intended to limit the scope of the invention.

Claims

1. A loudspeaker horn comprises at least two horn units which are connected with each other, wherein each horn unit comprises a horn-shaped shell, the large end of the shell is a panel, and the loudspeaker horn is characterized in that the shell comprises a throat pipe arranged at the small end of the shell, a plurality of manifolds are fixedly arranged in the throat pipe, and the manifolds are communicated with two ports of the throat pipe; a phase plug is also arranged in the shell, and part of the phase plug is arranged in the throat pipe; the horn unit comprises a high-frequency horn; the high-frequency horn comprises a fluid director used for shunting sound waves of the high-frequency driver; one part of the fluid director is arranged in the high-frequency horn throat pipe, and the other part of the fluid director is arranged outside the high-frequency horn shell and extends into a throat groove of the high-frequency driver when the high-frequency horn shell is connected with the high-frequency driver; the high-frequency horn further comprises a mounting seat connected with the small end of the shell; the manifold of the high-frequency horn is tightly distributed on the periphery of the fluid director; the phase plug of the high-frequency horn is tightly attached to one end of the fluid director, which is close to the face disc; when the shell of the high-frequency horn is connected with the high-frequency driver, the small end of the fluid director is arranged in the throat groove, and the large end of the fluid director is close to the throat pipe of the high-frequency horn; when the shell of the high-frequency horn is connected with the high-frequency driver, the manifold of the high-frequency horn is communicated with the throat groove of the high-frequency driver.

2. The loudspeaker horn of claim 1, wherein the horn unit is two, a high frequency horn and a mid frequency horn fixedly disposed at one side of the high frequency horn.

3. A loudspeaker horn according to claim 1 wherein the portion of the deflector which extends outside the housing is conical.

4. The loudspeaker horn of claim 1 wherein the outer enclosure wall is further provided with ribs for de-resonance in close proximity.

5. The loudspeaker horn of claim 1 wherein the top of the enclosure is further provided with a horn resonance abatement mode; the manifold is in the form of a streamlined curve.

6. The loudspeaker horn of claim 2, wherein the cross-section of the enclosure is quadrilateral; the phase plug is gradually thinned from bottom to top, the front side and the rear side are in a slope shape, the projections of the left side and the right side in the vertical direction are in a streamline shape, and the top end of the phase plug is in an arc shape; each side of the phase plug corresponds to a side of a quadrilateral.

7. The loudspeaker horn of claim 2 wherein the mid-range horn further comprises horn diffusion lobes of irregular and asymmetric configuration for canceling comb waves within the mid-range horn enclosure; and a driver compression cap is further arranged in the throat pipe of the medium-frequency horn, and the manifold arranged in the throat pipe is tightly attached and distributed on the periphery of the driver compression cap.

8. The speaker horn of claim 2, wherein the mid-frequency horn further comprises an odd order wave horns having a symmetrical and nonparallel structure provided on an inner wall of the mid-frequency horn housing and inserted between two adjacent manifolds.