Coaxial line sound source loudspeaker horn

Abstract

The utility model discloses a coaxial line sound source loudspeaker horn. The coaxial line sound source loudspeaker horn comprises a housing; a sound source outlet is formed in the top of the shell; the bottom of the housing is provided with a horn high-pitch inlet. A phase joint is arranged in the inner cavity of the shell; an acoustic channel is formed between the inner side wall of the shell and the outer side wall of the phase joint; two ends of the acoustic channel are respectively communicated with the horn high-pitch inlet and the sound source outlet; a clamping part is arranged on the outer side wall of the horn high pitch inlet; the high pitch inlet of the horn is clamped at the high pitch outlet of the coaxial loudspeaker through the clamping part. A phase joint guide is arranged at the bottom of the phase joint; the phase joint is guided and positioned in a cavity formed between the coaxial loudspeaker high pitch outlet and the horn high pitch inlet; the device can be quickly installed and fixed together with a coaxial driving unit; acoustic paths of a sound source from an inlet to an outlet through an acoustic channel are strictly equal, so that sound phases are accurate and consistent, linear array plane wave characteristics are met, and a high pitch part obtains uniform and consistent directivity in a coverage range.

Description

Technical Field

[0001] The utility model relates to the technical field of horn structures, and particularly to a coaxial sound source loudspeaker horn. Background Art

[0002] The high-frequency sound source provided by a coaxial loudspeaker needs to be radiated to the listening area through a horn, so that the high-frequency part has a uniform directivity within the coverage range, and it is required that the horn can be quickly assembled with the coaxial loudspeaker as a whole to radiate the sound source to the listening area. The existing horns cannot reduce the acoustic interference when the horns are stacked, and the acoustic paths from the entrance to the exit through the acoustic channels cannot ensure equality, and the sound phases cannot be made precisely consistent, which does not conform to the characteristics of linear array plane waves. Therefore, it is necessary to provide a coaxial sound source loudspeaker horn to solve the above technical problems. Content of the Utility Model

[0003] The purpose of the utility model is to provide a coaxial sound source loudspeaker horn, which can be quickly installed and fixed with a coaxial drive unit; the acoustic paths from the entrance to the exit through the acoustic channels are strictly equal, so that the sound phases are precisely consistent, conforming to the characteristics of linear array plane waves, and enabling the high-frequency part to have a uniform directivity within the coverage range.

[0004] The utility model is realized through the following technical solutions:

[0005] A coaxial sound source loudspeaker horn includes a housing; wherein: a sound source outlet with a gradually increasing diameter is arranged at the top of the housing; a horn high-frequency inlet with a gradually decreasing diameter is arranged at the bottom of the housing; a phase joint is arranged in the inner cavity of the housing; an acoustic channel is formed between the inner side wall of the housing and the outer side wall of the phase joint; one end of the acoustic channel is communicated with the horn high-frequency inlet, and the other end is communicated with the sound source outlet; a clamping part is arranged on the outer side wall of the horn high-frequency inlet; the horn high-frequency inlet is clamped at the high-frequency outlet of the coaxial loudspeaker through the clamping part; a phase joint guide is arranged at the bottom of the phase joint; the phase joint guide is located in the chamber formed between the high-frequency outlet of the coaxial loudspeaker and the horn high-frequency inlet.

[0006] Further as an improvement of the technical solution of the utility model, the sound source outlet is rectangular; a diffusion part is arranged on the sound source outlet.

[0007] Further as an improvement of the technical solution of the utility model, a connecting flange is arranged on the housing; the housing is connected with the coaxial loudspeaker through the connecting flange.

[0008] As a further improvement of the technical solution of the present utility model, the housing is mainly composed of a left housing and a right housing; the left housing and the right housing are assembled to form a housing for accommodating the phase joint.

[0009] As a further improvement of the technical solution of the present utility model, housing reinforcing ribs are provided on the outer side wall of the housing.

[0010] Advantages of the present utility model:

[0011] The present utility model provides a coaxial sound source loudspeaker horn that is convenient for installation and fixation. It can provide a high-frequency line sound source cylindrical wave, and the sound pressure level in the sound field within the horizontal coverage angle is evenly distributed. The coverage angle in the vertical direction is controlled within 10 degrees to reduce acoustic interference when multiple horns are stacked. The circular horn high-frequency inlet is transformed into a rectangular sound source outlet through the horn acoustic channel combination transducer device. The wavefront of the sound source forms a plane wavefront at the sound source outlet, and then a cylindrical wave line sound source is radiated to the listening area through diffusion control of the coverage angle. The coaxial loudspeaker horn of the present utility model realizes the rapid assembly of the horn and the coaxial sound source loudspeaker by setting the clamping part. The acoustic paths of the sound source from the horn high-frequency inlet to the sound source outlet through the acoustic channel are strictly equal, enabling the sound phases to reach precise consistency, conforming to the characteristics of a linear array plane wave, and making the directivity of the high-frequency part uniform within the coverage range. Description of the Drawings

[0012] Figure 1 is a three-dimensional structural schematic diagram of a coaxial sound source loudspeaker horn of the present utility model;

[0013] Figure 2 is a side structural schematic diagram of a coaxial sound source loudspeaker horn of the present utility model;

[0014] Figure 3 is Figure 2 a central cross-sectional schematic diagram of;

[0015] Figure 4 is a front structural schematic diagram of a coaxial sound source loudspeaker horn of the present utility model;

[0016] Figure 5 is a top structural schematic diagram of a coaxial sound source loudspeaker horn of the present utility model;

[0017] Figure 6 is a bottom structural schematic diagram of a coaxial sound source loudspeaker horn of the present utility model.

[0018] In the accompanying drawings: 1 - housing; 2 - phase connector; 3 - acoustic channel; 11 - sound source outlet; 12 - horn tweeter inlet; 13 - clamping part; 14 - connecting flange; 15 - housing reinforcing rib; 21 - phase connector guide; 101 - left housing; 102 - right housing; 111 - diffusion part. Detailed implementation mode

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Here, the schematic embodiments and descriptions of the present invention are used to explain the present invention, but do not limit the present invention.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, upper end, lower end, top, bottom...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0021] In the present invention, unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood according to specific circumstances.

[0022] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0023] Such as Figures 1 to 6As shown in the figure, a coaxial sound source loudspeaker horn includes a housing 1. Among them: a sound source outlet 11 with a gradually expanding diameter is provided at the top of the housing 1; a horn high-frequency inlet 12 with a gradually shrinking diameter is provided at the bottom of the housing 1; a phase connector 2 is arranged in the inner cavity of the housing 1; an acoustic channel 3 is formed between the inner side wall of the housing 1 and the outer side wall of the phase connector 2; one end of the acoustic channel 3 is communicated with the horn high-frequency inlet 12, and the other end is communicated with the sound source outlet 11; a clamping portion 13 is provided on the outer side wall of the horn high-frequency inlet 12; the horn high-frequency inlet 12 is clamped at the high-frequency outlet of the coaxial loudspeaker through the clamping portion 13; a phase connector guide 21 is provided at the bottom of the phase connector 2; the phase connector guide 21 is located in the chamber formed between the high-frequency outlet of the coaxial loudspeaker and the horn high-frequency inlet 12. The utility model provides a coaxial sound source loudspeaker horn which is convenient for installation and fixation. It can provide a high-frequency line sound source cylindrical wave and the sound pressure level in the sound field within the horizontal coverage angle is evenly distributed. The coverage angle in the vertical direction is controlled within 10 degrees to reduce the acoustic interference when multiple horns are stacked. The circular horn high-frequency inlet 12 is combined with a transducer device through the horn acoustic channel 3 to form a rectangular sound source outlet 11. The wavefront at the sound source outlet 11 forms a plane wavefront, and then the coverage angle is controlled through diffusion to form a cylindrical wave line sound source and radiate to the listening area. For the coaxial loudspeaker horn of the utility model, the quick assembly of the horn and the coaxial sound source loudspeaker is realized by setting the clamping portion 13. The acoustic paths of the sound source from the horn high-frequency inlet 12 to the sound source outlet 11 through the acoustic channel 3 are strictly equal, so that the sound phases are accurately consistent, meeting the characteristics of the linear array plane wave, and enabling the high-frequency part to have a uniform and consistent directivity within the coverage range.

[0024] It should be noted that the phase connector guide 21 is provided because there is a chamber between the high-frequency outlet of the coaxial loudspeaker and the horn high-frequency inlet 12. The size of the volume of this chamber will generate resonance, thus leading to irregularities in the high frequencies of the frequency response. By adding the phase connector guide 21, the volume of the chamber is reduced so that its resonance frequency is outside the working frequency. The utility model provides a high-frequency line sound source cylindrical wave for the coaxial loudspeaker and the sound pressure level in the sound field within the horizontal coverage angle is evenly distributed. The coverage angle in the vertical direction is controlled within 10 degrees (the adjustable angle of a single speaker is within 10 degrees) to minimize the acoustic interference when multiple horns are stacked. In order to change the point sound source into a line sound source, the circular sound source inlet needs to be combined through the horn acoustic channel 3 to form a rectangular outlet. The wavefront at the outlet forms a plane wavefront, and then the coverage angle is controlled through diffusion to form a cylindrical wave and radiate to the sound field.

[0025] Specifically, in the solution of this embodiment, a connecting flange 14 is provided on the outer shell 1; the outer shell 1 is connected to a coaxial speaker through the connecting flange 14. It should be noted that by controlling the coverage angles of the coaxial speaker in the vertical and horizontal directions, different coverage angles are provided in the horizontal cross-section from top to bottom in the vertical direction.

[0026] Specifically, in the solution of this embodiment, the sound source outlet 11 is rectangular; a diffusion part 111 is provided on the sound source outlet 11. It should be noted that in order to transform a point sound source into a line sound source in the present utility model, the circular horn high-frequency inlet 12 needs to be combined through the horn acoustic channel 3 to form a rectangular outlet. A plane wavefront is formed at the outlet, and then the coverage angle is controlled through diffusion to form a cylindrical wave for radiation to the sound field.

[0027] Specifically, in the solution of this embodiment, the outer shell 1 is mainly composed of a left shell 101 and a right shell 102; the left shell 101 and the right shell 102 are assembled to form the outer shell 1 that houses the phase joint 2.

[0028] Specifically, in the solution of this embodiment, a shell reinforcing rib 15 is provided on the outer side wall of the outer shell 1, which improves the stability of the shell structure.

[0029] Principle description of the present utility model: In order to achieve the goal of a plane wavefront (plane wave) at the outlet, the sound pressure and phase at the outlet must be equal everywhere. Therefore, according to the objective function, it is decomposed into several conditional constraints for shape optimization to construct the required horn: 1. The acoustic paths from the inlet through the acoustic channel 3 to the outlet are strictly equal (initially estimated from the physical path), and the straightness of the path is determined by the limitations of the structure of the coaxial speaker itself; 2. The echo at the inlet is minimized; 3. The size of the channel outlet is determined by 1 / 4 wavelength of the highest frequency controlled by the horn; 4. There should be no large mutation in the impedance of the inlet plane (to reduce the resonance generated by the channel); 5. Evaluate that the sound pressure level in the sound field 1 meter away from the outlet is as smooth as possible. There is a phase joint guide 21 because there is a chamber between the high-frequency outlet of the coaxial speaker and the horn high-frequency inlet 12, and the size of this volume will generate resonance, thus leading to irregularities in the high frequencies in the frequency response. Adding the joint guide reduces the volume so that its resonance frequency is outside the operating frequency.

[0030] Compared with the prior art, the present utility model provides a coaxial line sound source speaker horn, which can be quickly installed and fixed together with a coaxial drive unit; the acoustic paths from the inlet through the acoustic channel 3 to the outlet are strictly equal, enabling the sound phase to reach precise consistency, meeting the characteristics of a linear array plane wave, and making the directivity of the high-frequency part uniform within the coverage range.

[0031] The above has introduced in detail the technical solutions provided by the embodiments of the present utility model. Specific examples are used herein to elaborate on the principles and implementation manners of the embodiments of the present utility model. The description of the above embodiments is only applicable to helping understand the principles of the embodiments of the present utility model; at the same time, for those of ordinary skill in the art, according to the embodiments of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A coaxial line sound source loudspeaker horn, comprising a housing; characterized in that: The top of the housing is provided with a sound source outlet with a gradually expanding diameter; the bottom of the housing is provided with a horn tweeter inlet with a gradually shrinking diameter; a phase connector is arranged in the inner cavity of the housing; an acoustic channel is formed between the inner side wall of the housing and the outer side wall of the phase connector; one end of the acoustic channel is communicated with the horn tweeter inlet, and the other end is communicated with the sound source outlet; a clamping part is arranged on the outer side wall of the horn tweeter inlet; the horn tweeter inlet is clamped at the high-frequency outlet of the coaxial speaker through the clamping part; a phase connector guide is arranged at the bottom of the phase connector; the phase connector guide is located in the chamber formed between the high-frequency outlet of the coaxial speaker and the horn tweeter inlet.

2. The coaxial sound source speaker horn according to claim 1, characterized in that: The sound source outlet is rectangular; a diffusion part is arranged on the sound source outlet.

3. The coaxial sound source speaker horn according to claim 1, characterized in that: A connecting flange is arranged on the housing; the housing is connected to the coaxial speaker through the connecting flange.

4. The coaxial line sound source speaker horn according to claim 1, characterized in that: The housing is mainly composed of a left housing and a right housing; the left housing and the right housing are assembled to form a housing for accommodating the phase connector.

5. A coaxial line sound source speaker horn according to claim 1, characterized in that: A housing reinforcing rib is arranged on the outer side wall of the housing.

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