Coaxial loudspeaker horn

Abstract

The utility model belongs to the technical field of loudspeakers, in particular to a coaxial loudspeaker horn, which comprises a shell, the shell comprises a bottom shell with a conical outer part and a high-pitch horn at the top of the bottom shell, the top of the high-pitch horn is provided with a rectangular outlet, and the periphery of the bottom shell is provided with a low-pitch horn; the long edge of the outlet is connected with the bottom end of the bottom shell through a first side plate, the middle of the first side plate converges towards the inner side of the outlet and is in a U shape, and phase connectors are arranged in the bottom shell and the high-pitch horn. According to the utility model, high-pitch sound waves are transmitted from the bottom of the phase joint to the outlet through the acoustic channel between the phase joint and the shell, so that a point sound source is changed into a line sound source, plane waves are formed in front of waves at the outlet, and cylindrical waves are formed through diffusion control of a coverage angle and are radiated to a sound field; therefore, the sound pressure and the phase at the outlet are equal everywhere, high-pitch sound source cylindrical waves are provided for the coaxial loudspeaker, and the sound pressure level of the sound field in the horizontal coverage angle is uniformly distributed.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a coaxial loudspeaker horn. Background Art

[0002] Existing coaxial speakers feature two speakers mounted on the same axis: a tweeter and a woofer, responsible for producing high and low frequencies, respectively. A speaker horn adds a load (i.e., a horn structure) in front of the speaker unit to redirect sound and enhance its output efficiency. This design allows sound to be more concentrated in a specific direction, while also improving loudness and clarity.

[0003] A line source, also known as a "cylindrical sound source," is a sound source whose dimensions in one direction are significantly greater than those in the other two directions. A line source, whether a linear sound source or a collection of numerous unrelated point sound sources, can be considered a line source if its radiated sound energy is evenly distributed along a cylindrical surface centered on the line source in a free sound field. Due to its unique geometry and radiation pattern, a line source's sound energy is more evenly distributed over a given distance and decays relatively slowly.

[0004] When using existing coaxial speaker horns, acoustic interference is easily generated when multiple horns are superimposed. This is because the sound wave outlet of the horn has a large coverage angle in the vertical direction, resulting in uneven distribution of the sound pressure level of the cylindrical wave of the high-pitched sound source, which will greatly affect the sound quality.

[0005] Therefore, in order to improve the output sound quality of existing coaxial loudspeaker horns, the present application proposes a coaxial loudspeaker horn that minimizes the acoustic interference between them when multiple horns are stacked and used. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides a coaxial loudspeaker horn, which solves the problem that acoustic interference is easily generated when multiple horns are stacked and used.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a coaxial loudspeaker horn, comprising a housing, the housing comprising a bottom shell having a conical exterior and a treble horn on the top of the bottom shell, the top of the treble horn being provided with a rectangular outlet, and a bass horn being provided on the outer periphery of the bottom shell;

[0008] The long side of the outlet is connected to the bottom end of the bottom shell through a first side panel. The middle part of the first side panel converges toward the inside of the outlet and is U-shaped. A phase joint is provided in the bottom shell and the tweeter horn. There is a gap between the inner wall of the outer shell and the outer surface of the phase joint to form an acoustic channel.

[0009] Through the above structure, the treble sound waves propagate from the bottom of the phase joint (hereinafter referred to as the guide joint) through the acoustic channel between the phase joint and the shell to the outlet, thereby realizing the transformation from a point sound source to a line sound source, and forming a plane wave front at the wave front at the outlet, and then forming a cylindrical wave through the diffusion control coverage angle to radiate to the sound field, so that the sound pressure and phase at the outlet are equal everywhere, providing the coaxial speaker with a treble line sound source cylindrical wave and a uniform distribution of sound pressure level in the sound field within the horizontal coverage angle, and also making the sound pressure level of the sound field 1 meter away from the outlet relatively smooth.

[0010] Preferably, the wide side of the outlet is connected to the bottom end of the bottom shell through a second side plate, the top ends of the two second side plates are inclined toward the outside of the outlet, and the inclination angle of the second side plates is 0-10 degrees.

[0011] Preferably, both ends of the phase joint on the shaft side wall are fixedly connected to the bottom shell.

[0012] Preferably, the shell is divided into two halves in the width direction of the outlet, and the outer sides of both ends of the shell in the length direction of the outlet are provided with ears, and the ears are provided with through holes.

[0013] Preferably, both ends of the axial side wall of the phase joint are provided with mounting ears that cooperate with the support ears.

[0014] Preferably, the outer wall of the phase joint corresponds in shape to the inner wall of the housing.

[0015] Preferably, it further comprises a base, the bottom shell is fixedly connected to the base, and a treble outlet slot is provided in the base.

[0016] Compared with the prior art, the present invention provides a coaxial loudspeaker horn with the following beneficial effects:

[0017] The horn of the coaxial loudspeaker has a treble sound wave that propagates from the bottom of the phase joint through the acoustic channel between the phase joint and the shell to the outlet, thereby realizing the transformation from a point sound source to a line sound source, and forming a plane wave front at the wave front at the outlet, and then forming a cylindrical wave through the diffusion control coverage angle to radiate to the sound field, so that the sound pressure and phase at the outlet are equal everywhere, providing the coaxial loudspeaker with a treble line sound source cylindrical wave and a uniformly distributed sound pressure level in the horizontal coverage angle, and also making the sound pressure level of the sound field 1 meter away from the outlet relatively smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the coaxial loudspeaker horn;

[0019] Figure 2 This is a top view of the structure of the coaxial loudspeaker horn;

[0020] Figure 3 This is the left side view of the structure of the coaxial loudspeaker horn;

[0021] Figure 4 This is a front view of the structure of the coaxial loudspeaker horn;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the housing in the coaxial loudspeaker horn;

[0023] Figure 6 for Figure 5 Left view of;

[0024] Figure 7 for Figure 5 Front view of .

[0025] In the figure: 1. Outer shell; 2. Bottom shell; 3. Tweeter horn; 31. Outlet; 4. Bass horn; 5. First side panel; 6. Phase joint; 61. Mounting ear; 62. Guide joint; 7. Acoustic channel; 8. Second side panel; 9. Support ear; 91. Through hole; 10. Base; 101. Tweeter outlet slot. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-4 The utility model provides the following technical solutions: a coaxial loudspeaker horn, comprising a housing 1, the housing 1 comprising a bottom shell 2 with a conical exterior and a treble horn 3 on the top of the bottom shell 2, a rectangular outlet 31 being provided on the top of the treble horn 3, and a bass horn 4 being provided on the periphery of the bottom shell 2;

[0028] The long side of the outlet 31 is connected to the bottom end of the bottom shell 2 through a first side panel 5. The middle portion of the first side panel 5 converges toward the inside of the outlet 31 and is U-shaped. A phase joint 6 is provided in the bottom shell 2 and the tweeter horn 3. There is a gap between the inner wall of the outer shell 1 and the outer surface of the phase joint 6 to form an acoustic channel 7.

[0029] As an optional implementation scheme of the present invention, through the above structure, high-frequency sound waves are transmitted from the bottom of the phase joint 6 (hereinafter referred to as the guide joint 62) from the acoustic channel 7 between the phase joint 6 and the shell 1 to the outlet 31, thereby realizing the transformation from a point sound source to a line sound source, and forming a plane wave front at the wave front at the outlet 31, and then forming a cylindrical wave through the diffusion control coverage angle to radiate to the sound field, so that the sound pressure and phase at the outlet 31 are equal everywhere, providing the coaxial speaker with a high-frequency line sound source cylindrical wave and the sound pressure level of the sound field within the horizontal coverage angle is evenly distributed, and also making the sound pressure level of the sound field one meter away from the outlet 31 relatively smooth.

[0030] like Figure 2-3 As shown, the wide side of the outlet 31 is connected to the bottom end of the bottom shell 2 through the second side plate 8. The top ends of the two second side plates 8 are inclined toward the outside of the outlet 31, and the inclination angle of the second side plates 8 is 0-10 degrees.

[0031] As an optional implementation scheme of the present invention, the vertical coverage angle can be controlled within 10 degrees, so that the adjustable angle of a single speaker is within 10 degrees, to ensure that the acoustic interference between multiple speaker horns is minimized when they are superimposed and used.

[0032] like Figure 3 As shown, the two ends of the phase connector 6 on the shaft side wall are fixedly connected to the bottom shell 2.

[0033] As an optional implementation scheme of the present invention, the phase connector 6 can be installed in the housing 1 .

[0034] like Figure 3-7 As shown, the housing 1 is divided into two halves in the width direction of the outlet 31 , and the housing 1 is provided with lugs 9 on the outer sides of both ends in the length direction of the outlet 31 , and the lugs 9 are provided with through holes 91 .

[0035] As an optional implementation scheme of the present invention, the shell 1 is designed to be divided into two halves for the convenience of production and molding, and for the convenience of assembly of the shell 1. The two ears 9 can be fixed together by screws passing through the two through holes 91 to achieve the assembly of the entire shell 1.

[0036] like Figure 3-5 As shown, mounting ears 61 that cooperate with the supporting ears 9 are provided at both ends of the axial side wall of the phase joint 6.

[0037] As an optional embodiment of the present invention, the two halves of the housing 1 and the entire phase joint 6 can be assembled together by passing screws through the mounting ears 61 and the support ears 9, making the assembly of the loudspeaker horn more convenient.

[0038] like Figure 3-4 As shown, the outer wall of the phase connector 6 corresponds in shape to the inner wall of the housing 1 .

[0039] As an optional implementation scheme of the present invention, the physical acoustic paths of the sound waves from both sides of the phase joint 6 to the outlet 31 at the guide joint 62 are equal, ensuring that the sound waves can form a plane wave front at the outlet 31.

[0040] like Figure 1-4 As shown, it also includes a base 10, the bottom shell 2 is fixedly connected to the base 10, and a tweeter outlet slot 101 is provided in the base 10.

[0041] As an optional implementation scheme of the present invention, the bottom of the base 10 is connected to the sound source. After the shell 1 and the base 10 are assembled, the tweeter outlet slot 101 is a cavity. The size of this volume will produce resonance, thereby causing irregularities in the high frequency response. By setting the guide joint 62, the volume of the cavity can be reduced so that its resonant frequency is outside the operating frequency, and the resonance generated by the acoustic channel 7 is reduced, so that the impedance of the entrance plane of the acoustic channel 7 will not have a large mutation, and the echo of the sound wave at the entrance of the acoustic channel 7 is minimized.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A coaxial loudspeaker horn, comprising a housing, the housing comprising a bottom shell having a conical exterior and a treble horn on top of the bottom shell, the top of the treble horn being provided with a rectangular outlet, and a bass horn being provided on the periphery of the bottom shell, characterized in that: The long side of the outlet is connected to the bottom end of the bottom shell through a first side panel. The middle part of the first side panel converges toward the inside of the outlet and is U-shaped. A phase joint is provided in the bottom shell and the tweeter horn. There is a gap between the inner wall of the outer shell and the outer surface of the phase joint to form an acoustic channel.

2. The coaxial loudspeaker horn according to claim 1, characterized in that: The wide side of the outlet is connected to the bottom end of the bottom shell through a second side plate. The top ends of the two second side plates are inclined toward the outside of the outlet, and the inclination angle of the second side plates is 0-10 degrees.

3. The coaxial loudspeaker horn according to claim 1, characterized in that: The two ends of the phase joint on the shaft side wall are fixedly connected to the bottom shell.

4. The coaxial loudspeaker horn according to claim 3, characterized in that: The shell is divided into two halves in the width direction of the outlet, and the outer sides of both ends of the shell in the length direction of the outlet are provided with supporting ears, and the supporting ears are provided with through holes.

5. The coaxial loudspeaker horn according to claim 4, characterized in that: Both ends of the axial side wall of the phase joint are provided with mounting ears that cooperate with the support ears.

6. The coaxial loudspeaker horn according to claim 1, characterized in that: The outer wall of the phase joint corresponds to the shape of the inner wall of the housing.

7. A coaxial loudspeaker horn according to any one of claims 1 to 6, characterized in that: It also includes a base, the bottom shell is fixedly connected to the base, and a treble outlet groove is provided in the base.

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