Sound box with damping air cavity

Abstract

The utility model discloses a sound box with a damping air cavity, which comprises a main box body, a main acoustic cavity is arranged in the main box body, a loudspeaker is mounted on the side wall of the main box body, one side of the loudspeaker is communicated with the main acoustic cavity, and the other side of the loudspeaker is communicated with an external space; a damping air cavity is formed in the main box body, the damping air cavity is separated from the main acoustic cavity through a partition wall, an air leakage hole is formed in the partition wall, and the air leakage hole is communicated with the main acoustic cavity and the damping air cavity; the side wall of the main box body is provided with an inverter tube, one end of the inverter tube extends into the main acoustic cavity, the other end of the inverter tube is communicated with the external space, and the end, extending into the main acoustic cavity, of the inverter tube is arranged at the position corresponding to the air leakage hole. According to the utility model, the sound quality effect of the sound box can be improved, the low-frequency performance of the sound box is cleaner and more compact, and sound cracking and sound distortion are reduced.

Description

Technical Field

[0001] This utility model relates to the field of audio playback device technology, specifically to a speaker with a damped air cavity. Background Technology

[0002] The speaker is the terminal of the entire audio system. Its function is to convert audio electrical energy into corresponding sound energy and radiate it into space. It is an extremely important component of the audio system, responsible for converting electrical signals into sound signals for people to hear directly.

[0003] To reduce speaker cabinet vibration and improve sound quality, existing speaker enclosure designs typically involve changing the material of the cabinet or adding damping materials, such as sound-absorbing cotton, to the inner walls of the cabinet. These damping materials absorb some of the sound energy, thereby reducing cabinet resonance. However, this structural approach generally suffers from the following problems:

[0004] 1. Sound wave reflection inside the cabinet forms standing waves in a certain frequency band (e.g., 20-200Hz), causing peak-valley distortion in the frequency response curve, resulting in unsatisfactory sound quality of the speaker.

[0005] 2. Transient response hysteresis: Insufficient control of airflow by the damping material leads to bass trailing, causing the speaker diaphragm to return to its original position with delay, resulting in distortion of the sound played by the speaker. Utility Model Content

[0006] To address some or all of the problems existing in the prior art, this utility model provides a speaker enclosure with a damping air chamber, comprising a main enclosure, a main acoustic cavity within the main enclosure, a loudspeaker mounted on the side wall of the main enclosure, one side of the loudspeaker communicating with the main acoustic cavity and the other side communicating with the external space; the main enclosure contains a damping air chamber, which is separated from the main acoustic cavity by a partition wall, the partition wall having a vent hole communicating with both the main acoustic cavity and the damping air chamber; a bass reflex port is mounted on the side wall of the main enclosure, one end of the bass reflex port extending into the main acoustic cavity, the other end of the bass reflex port communicating with the external space, the end of the bass reflex port extending into the main acoustic cavity being positioned corresponding to the vent hole, and a gap being reserved between the bass reflex port and the partition wall.

[0007] As a further improvement of this utility model, one end of the partition wall is provided with an extension plate, the extension plate extends toward the guide tube, and the extension plate covers the gap.

[0008] As a further improvement of this utility model, the end face of the extension plate extends beyond the end face of the phase inverter tube.

[0009] As a further improvement of this utility model, the end of the phase inverter tube that extends into the main acoustic cavity is in the shape of a gradually expanding horn.

[0010] As a further improvement of this utility model, the number of vent holes is 7, and the diameter of the vent holes ranges from 2 to 10 mm.

[0011] As a further improvement of this utility model, a sound-absorbing layer is provided on the inner wall of the damping air cavity.

[0012] As a further improvement of this utility model, the sound-absorbing layer is made of polyester fiber or glass wool.

[0013] As a further improvement of this utility model, the thickness of the sound-absorbing layer ranges from 1 to 5 mm.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. Standing Wave Suppression: The damping air chamber absorbs excess low-frequency energy (such as the 50-200Hz band) through the vent, preventing sound waves from reflecting multiple times within the main cabinet and forming standing waves. The damping air chamber, together with the bass reflex port, forms a Helmholtz resonance system, which concentrates excess energy in a specific frequency band, making the low-frequency performance of the speaker cleaner and tighter, thus improving the sound quality.

[0016] 2. Transient response optimization: The damping air chamber forms an air spring effect through the intake and exhaust of the vent hole; the air spring effect shortens the reaction time of the speaker diaphragm movement to the millisecond level, suppressing speaker diaphragm overshoot; thus improving dynamic response speed and accuracy.

[0017] 3. The damping air chamber allows for smoother air compression within the main enclosure. This is equivalent to adding a buffer to the bass, ensuring stable release of extremely low frequencies without abrupt disappearances, thus achieving a moderate bass extension.

[0018] 4. The limited space of the damping air chamber restricts the range of air movement, which can make the bass elastic and prevent the air from being excessively compressed and deformed, avoiding distortion or buzzing, and reducing distortion and sound distortion. Attached Figure Description

[0019] To more clearly illustrate the solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the external structure of an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of an embodiment of this utility model. Detailed Implementation

[0022] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0023] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0025] like Figure 1 , Figure 2 As shown, a speaker with a damped air cavity includes a main enclosure 1, a main acoustic cavity 2 inside the main enclosure 1, and a speaker 3 fixedly installed on the side wall of the main enclosure 1. One side of the speaker 3 is connected to the main acoustic cavity 2, and the other side is connected to the external space. The speaker 3 is the main sound-emitting unit, and the sound is propagated outward through the speaker 3.

[0026] The main enclosure 1 contains a damping air chamber 4, which is separated from the main acoustic cavity 2 by a partition wall 5. The partition wall 5 has a vent hole 6, which connects to both the main acoustic cavity 2 and the damping air chamber 4. When the speaker 3 operates, the vibration of its diaphragm drives the airflow within the main acoustic cavity 2. When the diaphragm of the speaker 3 opens into the main acoustic cavity 2, it compresses the air within the main acoustic cavity 2, allowing the air to flow into the damping air chamber 4 through the vent hole 6. When the diaphragm of the speaker 3 contracts, the air in the damping air chamber 4 flows into the main acoustic cavity 2 through the vent hole 6.

[0027] A bass reflex tube 7 is installed on the side wall of the main enclosure 1. One end of the bass reflex tube 7 extends into the main acoustic cavity 2, and the other end of the bass reflex tube 7 is connected to the external space. The end of the bass reflex tube 7 extending into the main acoustic cavity 2 is positioned at the corresponding location of the vent 6, and a gap 8 is reserved between the bass reflex tube 7 and the partition wall 5. In this embodiment, the function of the bass reflex tube 7 is the same as that of the bass reflex tube in existing speakers, and will not be described in detail here.

[0028] The speaker enclosure with a damping air chamber, by setting up the damping air chamber 4 and connecting the damping air chamber 4 to the main acoustic cavity 2 through the vent 6, can achieve the following beneficial effects:

[0029] 1. The damping air chamber 4, through the vent 6, can absorb excess low-frequency energy (such as the 50-200Hz frequency range), preventing sound waves from reflecting multiple times within the main enclosure 1 and forming standing waves. The damping air chamber 4, together with the bass reflex port 7, forms a Helmholtz resonance system, allowing excess energy to be concentrated and consumed in a specific frequency range, making the low-frequency performance of the speaker cleaner and tighter, and improving the sound quality.

[0030] 2. The damping air chamber 4 forms an air spring effect through the intake and exhaust of the vent hole 6; the air spring effect shortens the response time of the reaction force of the diaphragm movement of the speaker 3. According to the applicant's actual test, the response time can reach the millisecond level, which suppresses the overshoot of the speaker 3 diaphragm and improves the dynamic response speed and accuracy.

[0031] 3. The damping air chamber 4 makes the air compression inside the main enclosure 1 smoother. This is equivalent to adding a buffer to the bass, allowing even the lowest frequencies to be released stably without abruptly disappearing, thus resulting in a moderate bass extension.

[0032] 4. The limited space of the damping air chamber 4 restricts the range of air movement, which can make the bass elastic and prevent the air from being excessively compressed and deformed, avoiding distortion or buzzing, and reducing distortion and sound distortion.

[0033] To make the airflow within the main acoustic cavity 2 smoother, an extension plate 9 is provided at one end of the partition wall 5. The extension plate 9 extends towards the bass reflex port 7 and covers the gap 8. By setting the extension plate 9, the air in the main acoustic cavity 2 must turn around the extension plate 9 before flowing into the vent 6 or the bass reflex port 7, thereby lengthening the airflow distance and reducing the airflow speed to a certain extent. This makes the airflow into the damping air chamber 4 or the bass reflex port 7 smoother, further improving the sound quality of the speaker.

[0034] In this embodiment, the end face of the extension plate 9 extends beyond the end face of the phase inverter tube 7; this arrangement can further extend the distance of airflow and make the airflow smoother.

[0035] The end of the bass reflex tube 7 that extends into the main acoustic cavity 2 gradually widens into a horn shape. Setting the bass reflex tube 7 into a horn-shaped opening end can make the airflow velocity flowing into the bass reflex tube 7 more gentle, or make the airflow velocity flowing into the main acoustic cavity 2 through the bass reflex tube 7 more gentle, reducing airflow noise, thereby ensuring the sound quality of the speaker with damped air cavity.

[0036] In this embodiment, the vent holes 6 are arranged in two rows on the partition wall 5, with a total of 7 holes. In other embodiments, the number of vent holes 6 can be any other number depending on different user needs. This utility model does not limit the number of vent holes 6.

[0037] The diameter of the vent hole 6 ranges from 2 to 10 mm. Obviously, in other embodiments, the diameter of the vent hole 6 can also be adjusted according to actual needs, and this utility model does not limit this.

[0038] To further improve the sound quality, a sound-absorbing layer 10 is attached to the inner wall of the damping air chamber 4. The sound-absorbing layer 10 can absorb excess energy, making the sound of the speaker cleaner and more solid, thereby improving the sound quality of the speaker with the damping air chamber.

[0039] In this embodiment, the sound-absorbing layer 10 is made of polyester fiber. In other embodiments, the sound-absorbing layer 10 can also be made of other sound-absorbing materials such as glass wool.

[0040] In this embodiment, the thickness of the sound-absorbing layer 10 ranges from 1 to 5 mm. In other embodiments, the thickness of the sound-absorbing layer 10 can also be adjusted according to the speaker size or the needs of different users. This utility model does not limit this.

[0041] The above-described specific embodiments are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with this utility model are within the protection scope of this utility model.

Claims

1. A speaker enclosure with a damped air cavity, characterized in that: It includes a main enclosure, which contains a main acoustic cavity. A speaker is installed on the side wall of the main enclosure. One side of the speaker is connected to the main acoustic cavity, and the other side is connected to the external space. The main housing is provided with a damping air chamber, which is separated from the main acoustic cavity by a partition wall. The partition wall is provided with a vent hole, which is connected to the main acoustic cavity and the damping air chamber respectively. The main enclosure is provided with a phase inverter tube on its side wall. One end of the phase inverter tube extends into the main acoustic cavity, and the other end of the phase inverter tube is connected to the external space. The end of the phase inverter tube that extends into the main acoustic cavity is located at the position corresponding to the vent hole, and a gap is reserved between the phase inverter tube and the partition wall.

2. The speaker enclosure with damped air cavity according to claim 1, characterized in that: One end of the partition wall is provided with an extension plate, which extends toward the phase inverter and covers the gap.

3. The speaker enclosure with damped air cavity according to claim 2, characterized in that: The end face of the extension plate extends beyond the end face of the phase inverter.

4. The speaker enclosure with damped air cavity according to claim 1, characterized in that: The end of the phase inverter tube that extends into the main acoustic cavity is shaped like a gradually expanding horn.

5. The speaker enclosure with damped air cavity according to claim 1, characterized in that: The number of vent holes is 7, and the diameter of the vent holes ranges from 2 to 10 mm.

6. The speaker enclosure with a damped air cavity according to any one of claims 1-5, characterized in that: The inner wall of the damping air chamber is provided with a sound-absorbing layer.

7. The speaker enclosure with damped air cavity according to claim 6, characterized in that: The sound-absorbing layer is made of polyester fiber or glass wool.

8. The speaker enclosure with damped air cavity according to claim 6, characterized in that: The thickness of the sound-absorbing layer ranges from 1 to 5 mm.

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