A sound post speaker

Abstract

The utility model provides a kind of sound post speaker box, including shell and mesh cover, the shell is equipped with sealed installation cavity, the installation cavity is equipped with loudspeaker unit and two reverse phase pipes, two the reverse phase pipes are symmetrically equipped in the two ends of the loudspeaker unit along the length direction of the shell, the first passageway for the loudspeaker unit sound is passed out and two second passageways located at the two ends of the first passageway are set on the front side wall of the shell, one end of two the reverse phase pipes is located in the installation cavity, the other end is connected to two the second passageways respectively, so that the installation cavity is communicated with outside by two the reverse phase pipes, the mesh cover is connected on the front side wall of the shell.The utility model discloses a sound post speaker box, which can effectively expand the audio range, reduce the timbre distortion, more completely restore the sound effect, and improve the authenticity of the audience to obtain the sound.

Description

Technical Field

[0001] This utility model relates to the field of audio equipment technology, and more specifically, to a column speaker. Background Technology

[0002] In recent years, column speakers have become increasingly popular due to their slim and compact design, allowing them to blend seamlessly into architectural environments and create beautiful and comfortable listening spaces. Because of the acoustic characteristics of line sources, column speakers offer more uniform sound field coverage, wider horizontal directivity, and narrower vertical directivity compared to traditional point source speakers. Their excellent speech intelligibility and high sound gain make them particularly suitable for high-end applications such as conference rooms, auditoriums, airports, train stations, exhibition halls, and churches where high sound quality is required.

[0003] However, due to size and space limitations, traditional column speakers often use small speaker units arranged in a vertical array, such as 3" or 4" full-range speakers. The acoustic structure of the cabinet adopts a closed-box design, resulting in a lower limit of the column speaker's frequency response to around 120Hz-130Hz. The frequency range of human speech is approximately 100Hz-9000Hz, which is a characteristic of human hearing. Speech frequencies range from 100Hz to 9kHz, but the effective frequency response of the speaker can only reach 130Hz-20kHz. This causes the loss of sound information in the low-frequency range of 100-130Hz, resulting in the loss of the fundamental frequency of some male voices and timbre distortion. Furthermore, if the program reproduced by the column speaker contains rich instrumental signals, the lost signal frequency range will be even wider, and the timbre distortion will be more pronounced.

[0004] If a traditional column speaker adopts a single-channel full-range speaker array acoustic design, another problem is that the high-frequency directivity is too strong. Especially when there are many speakers and the array length is long, its vertical coverage area is only about 1° to 5°. Listeners outside this area will hear a significant reduction in high-frequency energy in the program, and the clarity will be significantly reduced. Utility Model Content

[0005] To overcome at least one of the defects in the prior art, this utility model provides a column speaker that can effectively expand the audio range, reduce timbre distortion, more completely reproduce the sound effect, and enhance the authenticity of the sound received by the listener.

[0006] The technical solution adopted by this utility model is to provide a column speaker: including a shell and a grille, the shell having a sealed mounting cavity, the mounting cavity having a speaker unit and two bass reflex tubes, the two bass reflex tubes being symmetrically arranged at both ends of the speaker unit along the length of the shell, the front sidewall of the shell having a first channel for sound from the speaker unit to pass through, and two second channels located at both ends of the first channel, one end of the two bass reflex tubes being located in the mounting cavity, and the other end being respectively connected to the two second channels, so that the mounting cavity is connected to the outside through the two bass reflex tubes, and the grille being connected to the front sidewall of the shell.

[0007] Compared with the prior art, the column speaker of this utility model has the following advantages:

[0008] In this utility model, the column speaker structure incorporates two bass reflex tubes symmetrically distributed on both sides of the speaker unit. This allows the sound waves within the mounting cavity to be transmitted more comprehensively to the outside of the housing, where they overlap with the sound waves from the front of the speaker unit. This broadens the low-frequency range and enhances the bass response, increasing the speaker's output efficiency. As a result, the lower limit of the speaker's frequency response reaches 60Hz. If the effective frequency response of the speaker can reach 60Hz-20kHz, then the sound information is essentially undamaged and can be faithfully reproduced, ensuring that listeners can hear the sound information clearly and completely.

[0009] As an improvement, the speaker unit includes a high-frequency speaker and two low-frequency speaker assemblies. The two low-frequency speaker assemblies are symmetrically arranged at both ends of the high-frequency speaker along the length of the housing, and a high-frequency horn is connected to the front end of the high-frequency speaker. The low-frequency speaker assembly includes at least one low-frequency speaker.

[0010] In a further improvement, the mounting cavity is also provided with a power amplifier module and a power amplifier power supply module, and the power amplifier module is connected to the speaker unit. The side wall of the housing is connected to a power socket that is electrically connected to the power amplifier power supply module and a power amplifier preamplifier module that is electrically connected to the power amplifier module.

[0011] In a further improved version, the two phase inverters have the same structure, each including a first tube extending along the length of the housing and a second tube extending along the front-rear direction of the housing, and the second tube and the first tube are connected by an arc-shaped tube; the end of the second tube near the front sidewall of the housing is a flared opening with gradually increasing opening.

[0012] In a further improvement, the first tube, the second tube, and the arc-shaped tube are integrally molded structures.

[0013] Preferably, the housing is a hollow aluminum profile structure, and both ends of the housing are connected to end caps.

[0014] In a further improvement, the mesh cover includes two steel meshes, which are spaced apart along the length of the shell, and a decorative panel is connected between the two steel meshes.

[0015] In a further improvement, two wall mounts are connected to the rear side wall of the housing, which are spaced apart along its length.

[0016] In a further improvement, sound-absorbing cotton is provided in the mounting cavity at the position corresponding to the speaker unit.

[0017] Other improvements and advantages of this invention will be set forth in the detailed description that follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures particularly pointed out in the description and drawings. Attached Figure Description

[0018] Figure 1 This is an exploded structural diagram of the column speaker of this utility model;

[0019] Figure 2 This is a partial front view of the column speaker of this utility model;

[0020] Figure 3 This is a cross-sectional view of the sound column speaker of this utility model;

[0021] Figure 4 This is a cross-sectional view of the sound column speaker box of this utility model from another position;

[0022] Figure 5 This is a schematic diagram of the connection between the wall mount and the housing in this utility model;

[0023] Figure 6 This is a schematic diagram of the conduit structure in this utility model;

[0024] Figure 7 This is a partial vertical sectional view of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Housing; 101. First channel; 102. Second channel; 2. Mesh cover; 3. Mounting cavity; 4. Bass reflex tube; 401. First tube body; 402. Second tube body; 403. Arc tube; 5. High-frequency speaker; 6. Tweeter horn; 7. Low-frequency speaker; 8. Power amplifier module; 9. Power amplifier power supply module; 10. Power socket; 11. Power amplifier preamplifier module; 12. End cover plate; 13. Decorative panel; 14. Wall mount; 15. Safety skirt plate; 16. Connecting post. Detailed Implementation

[0027] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0028] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0029] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] See Figures 1 to 7 As shown in the figure, this application discloses a column speaker, including a housing 1 and a grille 2. In this embodiment, the housing 1 is a long strip structure and is generally arranged vertically during use. A sealed mounting cavity 3 is provided in the housing 1 and the mounting cavity 3 extends along the length of the housing 1. A speaker unit and two bass reflex tubes 4 are provided in the mounting cavity 3 and are symmetrically arranged at both ends of the speaker unit along the length of the housing 1. A first channel 101 for sound from the speaker unit to pass through is provided on the front side wall of the housing 1, and two second channels 102 are located at both ends of the first channel 101. One end of the two bass reflex tubes 4 is located in the mounting cavity 3, and the other end is connected to the two second channels 102 respectively, so that the mounting cavity 3 communicates with the outside through the two bass reflex tubes 4. The grille 2 is connected to the front side wall of the housing 1 to form a complete column speaker. In this structure, the speaker unit, when operating, causes the air inside the mounting cavity 3 to vibrate. In a sealed speaker enclosure, this portion of the sound wave energy radiating into the enclosure would be wasted. In this structure, two symmetrically arranged bass reflex ports 4 propagate the sound waves from the mounting cavity 3 outwards. Figure 7 As shown by the middle arrow path, it can widen the low-frequency range and quantity, increase the speaker output efficiency, and make the lower limit of the speaker's frequency response reach 60Hz. If the effective frequency response of the speaker can reach 60Hz-20kHz, then the sound information is equivalent to no loss and can be truly reproduced, ensuring that the listener can hear the sound information clearly and completely.

[0031] In this embodiment, more specifically, the loudspeaker unit includes a high-frequency loudspeaker 5 and two low-frequency loudspeaker 7 assemblies. The two low-frequency loudspeaker 7 assemblies are symmetrically arranged at both ends of the high-frequency loudspeaker 5 along the length of the housing 1, and the front end of the high-frequency loudspeaker 5 is also connected to a tweeter horn 6. Each low-frequency loudspeaker 7 assembly includes at least one low-frequency loudspeaker 7. Preferably, each low-frequency loudspeaker 7 assembly includes three low-frequency loudspeakers 7. The first channel 101 includes a square through hole for connecting the horn of the tweeter horn 6, and six circular through holes for connecting the horn of each of the six low-frequency loudspeakers 7. Furthermore, a flange is provided on the outer periphery of the horn of each low-frequency loudspeaker 7, and each flange is connected to the front side wall of the housing 1 by screws. Similarly, a mounting skirt is provided on the outer periphery of the horn of the tweeter horn 6, and the mounting skirt is connected to the front side wall of the housing 1 by corresponding screws. This structure combines a low-frequency speaker 7 and a high-frequency speaker 5 to achieve a two-way acoustic scheme. The sound from the high-frequency speaker 5 is diffused through a high-frequency horn 6, resulting in a larger vertical coverage area, better sound field uniformity, and a maximum sound pressure level of up to 121 dB.

[0032] Furthermore, in the aforementioned structure, an amplifier module 8 and an amplifier power supply module 9 for supplying power to the amplifier module 8 are also provided within the mounting cavity 3. The amplifier module 8 is connected to the speaker unit, and a power socket 10 electrically connected to the amplifier power supply module 9 and an amplifier preamplifier module 11 electrically connected to the amplifier module 8 are connected to the side wall of the housing 1. The amplifier preamplifier is an important component of the audio system, primarily responsible for amplifying the audio signal output from the main unit to drive the bass, midrange, and tweeter units, thereby improving sound quality and power output.

[0033] In this embodiment, referring to Appendices 1, 6, and 7, the two bass reflex tubes 4 have identical structures, each including a first tube 401 extending along the length of the housing 1 and a second tube 402 extending along the front-rear direction of the housing 1. The second tube 402 is connected to the first tube 401 via an arc-shaped tube 403. The end of the second tube 402 near the front wall of the housing 1 has a gradually increasing horn opening. In the entire column speaker structure, the sound waves from the back of the six low-frequency speakers 7 (inside the paper cone diaphragm) are transmitted to the outside of the speaker through the upper and lower bass reflex tubes 4, superimposed with the sound waves from the front of the six low-frequency speakers 7, thus widening the low-frequency range. Here, the bass reflex tube 4 is a pipe-shaped sound transmission pipe, in which the cross-sectional area of ​​the outer part of the pipe in contact with the air is larger than the inner cross-sectional area. The length of the pipe meets the requirements of the speaker design (Helmholtz resonant cavity), and the enlarged horn opening on the outside can effectively reduce wind noise. During installation, first connect the flared end of each phase inverter 4 to the mounting skirt, and then connect the mounting skirt to the front side wall of the housing 1. In addition, a connecting post 16 extending toward the front side wall of the housing 1 is provided at the other end of each phase inverter 4. During installation, the outer end of the connecting post 16 abuts against the inner side of the front side plate of the housing 1, and screws are driven in from the outer side of the front side wall of the housing 1 to fix it to the connecting post 16.

[0034] In this embodiment, see Appendix Figure 6 The first tube 401, the second tube 402, and the arc-shaped tube 403 are integrally formed structures. This simplifies the manufacturing process and improves the sound wave propagation effect.

[0035] In addition, in this embodiment, the housing 1 is a hollow aluminum profile structure, and both ends of the housing 1 are connected to end cover plates 12; the housing 1 can be formed in one piece by extrusion process, which is convenient to process, and the aluminum material of the cabinet effectively improves the appearance of the speaker and is also lightweight.

[0036] Accordingly, see Appendix Figure 1 The mesh cover 2 includes two steel meshes, which are spaced apart along the length of the shell 1. A decorative plate 13 is connected between the two steel meshes. The split steel protective mesh design is not only easy to machine tool processing and forming, but also strengthens the overall mechanical strength of the mesh cover 2, effectively reducing mechanical resonance and making the sound quality purer.

[0037] In addition, in this embodiment, two wall mounts 14 are connected to the rear side wall of the housing 1, which are spaced apart along their length. The upper and lower ends of the speaker along its length are connected by professional wall mounts 14, and the wall mounts 14 can be rotated at a certain angle according to the needs of the sound reinforcement environment in order to achieve a satisfactory sound reinforcement effect.

[0038] In the above structure, sound-absorbing cotton (not shown in the figure) is provided in the mounting cavity 3 at the position corresponding to each speaker to absorb standing waves and improve the sound effect.

[0039] In the description of the embodiments of this application, it should be noted that the terms "upper", "lower", "front", "rear", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0040] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A column speaker enclosure, comprising a housing (1) and a grille (2), characterized in that: The housing (1) has a sealed mounting cavity (3) inside. The mounting cavity (3) is provided with a speaker unit and two bass reflex tubes (4). The two bass reflex tubes (4) are symmetrically arranged at both ends of the speaker unit along the length of the housing (1). The front sidewall of the housing (1) has a first channel (101) for the sound of the speaker unit to pass through, and two second channels (102) located at both ends of the first channel (101). One end of the two bass reflex tubes (4) is located in the mounting cavity (3), and the other end is connected to the two second channels (102) respectively, so that the mounting cavity (3) is connected to the outside through the two bass reflex tubes (4). The mesh cover (2) is connected to the front sidewall of the housing (1).

2. The column speaker according to claim 1, characterized in that: The loudspeaker unit includes a high-frequency loudspeaker (5) and two low-frequency loudspeaker (7) assemblies. The two low-frequency loudspeaker (7) assemblies are symmetrically arranged at both ends of the high-frequency loudspeaker (5) along the length direction of the housing (1). The front end of the high-frequency loudspeaker (5) is also connected to a high-frequency horn (6). The low-frequency loudspeaker (7) assembly includes at least one low-frequency loudspeaker (7).

3. The column speaker according to claim 1, characterized in that: The mounting cavity (3) is also provided with a power amplifier module (8) and a power amplifier power supply module (9), and the power amplifier module (8) is connected to the speaker unit. The side wall of the housing (1) is connected to a power socket (10) that is electrically connected to the power amplifier power supply module (9) and a power amplifier front board module (11) that is electrically connected to the power amplifier module (8).

4. The column speaker according to claim 1, characterized in that: The two phase inverters (4) have the same structure, each including a first tube (401) extending along the length of the housing (1) and a second tube (402) extending along the front-back direction of the housing (1), and the second tube (402) is connected to the first tube (401) by an arc-shaped tube (403); the end of the second tube (402) near the front side wall of the housing (1) is a flared mouth with gradually increasing opening.

5. The column speaker according to claim 4, characterized in that: The first tube (401), the second tube (402), and the arc-shaped tube (403) are integrally formed structures.

6. The column speaker according to any one of claims 1 to 5, characterized in that: The shell (1) is a hollow aluminum profile structure, and both ends of the shell (1) are connected to end caps (12).

7. The column speaker according to claim 6, characterized in that: The mesh cover (2) includes two steel meshes, and the two steel meshes are spaced apart along the length of the shell (1), with a decorative panel (13) connecting the two steel meshes.

8. The column speaker according to claim 7, characterized in that: Two wall mounts (14) are connected to the rear side wall of the housing (1) and are spaced apart along its length.

9. The column speaker according to claim 6, characterized in that: Sound-absorbing cotton is provided in the mounting cavity (3) at the position corresponding to the speaker unit.

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