Bass reflex system and loudspeaker device

Abstract

The present invention relates to the technical field of sound devices, and particularly to a bass reflex system and a loudspeaker device. The bass reflex system in the present invention comprises a transducer assembly, a housing assembly, and a pressure regulation member; the housing assembly comprises a shell and a cover plate; a first cavity having an open end is defined in the shell; the cover plate is arranged at the open end; a first fixing hole is formed on the cover plate; an elastic member is sealedly arranged at the first fixing hole; the pressure regulation member is sandwiched between the transducer assembly and the cover plate; a transducer end of the transducer assembly sequentially passes through the regulation member and the elastic member and is located in the first cavity; a second cavity is formed among the transducer assembly, the pressure regulation member and the elastic member; the pressure regulation member is provided with a Tesla channel; one end of the Tesla channel is communicated with the second cavity, and the other end of the Tesla channel is communicated with the outside. The bass reflex system in the technical solution can improve the bass reflex capability and the sound effect.

Description

Bass reflex system and speaker device Technical Field

[0001] The present invention belongs to the technical field of sound devices, and in particular relates to a bass reflex system and a sound device. Background Art

[0002] As we all know, speaker systems used in home hi-fi, music recording, stage performances, and other occasions typically consist of a transducer (speaker unit or motor), a cabinet structure (bass reflex system), and electronics (including a crossover network and power amplifier). For speaker system designers, once the appropriate transducer is selected, they can begin designing the entire speaker system. Choosing the cabinet structure is the most important and challenging part of building a speaker system. This is because, in addition to the sound quality of the transducer itself, the system's ultimate sound quality, especially in the low-frequency range, depends almost entirely on the designed cabinet structure. The cabinet structure is essentially built around the bass reflex system, so each cabinet structure is also composed of a specific bass reflex system. Current cabinet structures have poor bass reflex capabilities and effects, which in turn reduces the user experience.

[0003] Summary of the Invention

[0004] The purpose of the present invention is to at least solve the problem of poor bass reflection effect of existing box structures. This purpose is achieved through the following technical solutions:

[0005] A first aspect of the present invention provides a bass reflex system comprising:

[0006] Transducer assembly;

[0007] A housing assembly, the housing assembly comprising an outer shell and a cover plate, the outer shell defining a first cavity having an open end, the cover plate being disposed at the open end, the cover plate being provided with a first fixing hole, and an elastic member being sealed at the first fixing hole;

[0008] A pressure regulating member is clamped between the transducer assembly and the cover plate, the transducer end of the transducer assembly passes through the regulating member and the elastic member in sequence and is located in the first cavity, a second cavity is formed between the transducer assembly, the pressure regulating member and the elastic member, the pressure regulating member has a Tesla channel, one end of the Tesla channel is connected to the second cavity, and the other end of the Tesla channel is connected to the outside world.

[0009] By using the bass reflex system in the present technical solution, a combined structure of a transducer assembly, a shell assembly and a pressure regulating member is adopted. The transducer end of the transducer assembly can receive audio signals and generate vibrations, thereby driving the air in the first cavity. At the same time, the vibrating air will drive the elastic member on the cover of the shell assembly. The elastic member can transfer the vibration energy of the first cavity to the second cavity and produce airflow, and then transfer the airflow generated in the second cavity to the outside through the Tesla channel. Since the Tesla channel structure has the effect of unidirectional acceleration or unidirectional deceleration, in order to achieve the purpose of regulating the air pressure, the airflow will finally be discharged from the entire bass reflex system in the required posture and at a higher rate than the traditional rate, and coupled with the external space to output low-frequency energy, thereby improving the bass reflex capability and sound effect.

[0010] In addition, the bass reflex system according to the present invention may also have the following additional technical features:

[0011] In some embodiments of the present invention, the transducer assembly includes a transducer and a sealing plate, a second fixing hole is provided on the sealing plate, one end of the transducer passes through the pressure regulating member and the elastic member in sequence and is located in the first cavity, and the other end of the transducer is sealed in the second fixing hole, and the second cavity is formed between the transducer, the sealing plate, the elastic member and the pressure regulating member.

[0012] In some embodiments of the present invention, the elastic part includes a membrane body, a first connecting part and a second connecting part, the inner side of the membrane body is connected to the first connecting part, the first connecting part has a hollow structure, the hollow structure is sealed with the transducer, the outer side of the membrane body is connected to the second connecting part, and the side of the second connecting part facing away from the membrane body is connected to the wall of the first fixing hole.

[0013] In some embodiments of the present invention, the Tesla channel includes a plurality of first pressure regulating areas and a plurality of second pressure regulating areas, wherein the first pressure regulating areas and the second pressure regulating areas are spaced and alternately arranged along the circumference of the transducer;

[0014] The first pressure regulating zone is used to accelerate the airflow flowing from the second cavity to the outside world, and to decelerate the airflow flowing from the outside world to the second cavity. The second pressure regulating zone is used to decelerate the airflow flowing from the second cavity to the outside world, and to accelerate the airflow flowing from the outside world to the second cavity.

[0015] In some embodiments of the present invention, a radial dimension of the second fixing hole increases gradually along a first direction, where the first direction is a direction from the cover plate toward the sealing plate.

[0016] In some embodiments of the present invention, the axis of the transducer and the axis of the housing are arranged to coincide with each other.

[0017] In some embodiments of the present invention, the sealing plate, the pressure regulating member and the cover plate are arranged in parallel in pairs.

[0018] In some embodiments of the present invention, a filter element is provided at an opening at one end of the Tesla channel. The filter element is an annular structure and is arranged on a side of the pressure regulating element facing the second cavity.

[0019] In some embodiments of the present invention, a plurality of the filter elements are provided, and the plurality of filter elements are spaced apart and arranged in parallel along a second direction, where the second direction is the direction of the Tesla channel toward the second cavity.

[0020] A second aspect of the present invention provides a sound speaker device comprising the above-mentioned bass reflex system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference numerals are used throughout the accompanying drawings to denote the same components. In the accompanying drawings:

[0022] FIG1 schematically shows a structural diagram of a bass reflex system according to an embodiment of the present invention;

[0023] FIG2 is a schematic structural diagram of the bass reflex system in FIG1 without the sealing plate;

[0024] FIG3 is a schematic diagram of the exploded structure of the bass reflex system in FIG1 ;

[0025] FIG4 is a side structural cross-sectional view of the bass reflex system in FIG1 ;

[0026] FIG5 is a schematic structural diagram of portion A in FIG4 .

[0027] The reference numerals in the accompanying drawings represent the following:

[0028] 100. Bass reflex system;

[0029] 10. Transducer assembly; 11. Transducer; 12. Sealing plate; 121. Second fixing hole;

[0030] 21. Housing; 211. First cavity; 22. Cover; 221. First fixing hole; 23. Elastic member; 231. Membrane portion; 232. First connecting portion; 2321. Hollow structure; 233. Second connecting portion;

[0031] 30. Pressure regulating parts;

[0032] 40. Filter components;

[0033] 50. Second cavity;

[0034] A. First pressure adjustment area; B. Second pressure adjustment area. DETAILED DESCRIPTION

[0035] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0036] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0037] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0038] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0039] For speaker system designers, once they've selected the appropriate transducer, they can begin designing the entire speaker system. Choosing the right cabinet structure is the most crucial and challenging aspect of building a speaker system. This is because, in addition to the sound quality of the transducer itself, the system's ultimate sound quality, especially in the low-frequency range, depends almost entirely on the cabinet structure. The cabinet structure is essentially built around the bass reflex system, so each cabinet structure is also composed of a specific bass reflex system. Current cabinet structures offer poor bass reflex performance, which in turn reduces the user experience.

[0040] Figure 1 schematically illustrates a bass reflex system 100 according to an embodiment of the present invention. Figure 3 is an exploded structural diagram of the bass reflex system 100 in Figure 1. As shown in Figures 1 and 3, the present invention provides a bass reflex system 100 and a speaker device. The bass reflex system 100 in the present invention includes a transducer assembly 10, a shell assembly and a pressure regulating member 30. The shell assembly includes an outer shell 21 and a cover plate 22. A first cavity 211 with an open end is defined in the outer shell 21. The cover plate 22 is arranged at the open end. A first fixing hole 221 is provided on the cover plate 22. An elastic member 23 is sealed at the first fixing hole 221. The pressure regulating member 30 is clamped between the transducer assembly 10 and the cover plate 22. The transducer end of the transducer assembly 10 is sequentially penetrated by the regulating member 30 and the elastic member 23 and is located in the first cavity 211. A second cavity 50 is formed between the transducer assembly 10, the pressure regulating member 30 and the elastic member 23. The pressure regulating member 30 has a Tesla channel. One end of the Tesla channel is connected to the second cavity 50, and the other end of the Tesla channel is connected to the outside world.

[0041] By using the bass reflex system 100 in the present technical solution, a combined structure of a transducer component 10, a shell component and a pressure regulating component 30 is adopted. The transducer end of the transducer component 10 can receive audio signals and generate vibrations, thereby driving the air in the first cavity 211. At the same time, the vibrating air will drive the elastic component 23 on the shell component cover 22. The elastic component 23 can transfer the vibration energy of the first cavity 211 to the second cavity 50 and generate airflow, and then transfer the airflow generated in the second cavity 50 to the outside through the Tesla channel. Since the Tesla channel structure has the effect of unidirectional acceleration or unidirectional deceleration, in order to achieve the purpose of regulating the air pressure, the airflow will finally be discharged from the entire bass reflex system 100 in the required posture and at a higher rate than the traditional rate, and coupled with the external space to output low-frequency energy, thereby improving the bass reflex capability and sound effect.

[0042] Specifically, in this embodiment, the bass reflex system 100 is formed by a "double-cabin" structure, which is divided into a front cabin (i.e., the first cavity 211) and a rear cabin (i.e., the second cavity 50) according to the order in which the energy airflow passes in phase. The front cabin is composed of an outer shell 21, a cover plate 22 and an elastic member 23, and the rear cabin is composed of an elastic member 23, a transducer assembly 10 and a pressure regulating member 30. The elastic member 23 is a common part between the two cabins, which is used for airtight isolation and energy transition between the two cabins. This characteristic is like the diaphragm between the thoracic cavity and the abdominal cavity in the human body. It is worth noting that the "double-cabin" structure of this system is not the "double-cabin" in the traditional band-pass structure, because the elastic member 23 is contained between the two cabins of this system and is used to separate the two cabins by the elastic member 23. The rear cabin of this system contains a Tesla channel, but the elastic member 23 and the Tesla channel are not found in the double cabins of the traditional band-pass structure, and the Tesla channel has never been used in the field of audio or speakers before.

[0043] Specifically, the elastic member 23 is processed through a special process and is a rubber product that has spring properties but is not prone to generating noise and can also achieve airtight properties.

[0044] In some embodiments of the present invention, as shown in Figures 3 and 4, the transducer assembly 10 includes a transducer 11 and a sealing plate 12. The sealing plate 12 is provided with a second fixing hole 121. One end of the transducer 11 is sequentially passed through a pressure regulating member 30 and an elastic member 23 and positioned within a first cavity 211. The other end of the transducer 11 is sealed within the second fixing hole 121. A second cavity 50 is formed between the transducer 11, the sealing plate 12, the elastic member 23, and the pressure regulating member 30. In this embodiment, the transducer 11 is a custom-made ultra-thin drive unit, but in other embodiments, a conventional speaker drive unit or motor may be employed. The sealing plate 12 and the cover plate 22 are used to compress and secure the pressure regulating member 30 and seal the Tesla channel of the pressure regulating member 30 on both sides along a first direction, with the first direction being the direction from the cover plate 22 toward the sealing plate 12. This ensures that air can flow through the Tesla channel only from the second cavity 50 to the outside world, or vice versa, improving reliability. The second fixing hole 121 is used to fix the transducer 11 , and the fixing end of the transducer 11 is sealedly connected to the second fixing hole 121 .

[0045] Specifically, in this embodiment, the second cavity 50 is an annular structure, which is arranged on the circumferential outside of the transducer 11 and located inside the pressure regulating member 30 .

[0046] In some embodiments of the present invention, as shown in Figures 3 and 5, the elastic member 23 includes a membrane body 231, a first connecting portion 232, and a second connecting portion 233. The inner side of the membrane body 231 is connected to the first connecting portion 232. The first connecting portion 232 has a hollow structure 2321, and the hollow structure 2321 is sealed with the transducer 11. The outer side of the membrane body 231 is connected to the second connecting portion 233, and the side of the second connecting portion 233 facing away from the membrane body 231 is connected to the hole wall of the first fixing hole. In this embodiment, the hollow structure 2321 in the first connecting portion 232 is used for the transducer 11 to pass through and is sealed with the transducer 11, which can ensure that the back side of the transducer 11 (the side opposite to the first direction) is located in the first cavity 211, thereby achieving a driving effect on the air inside the first cavity 211.

[0047] Specifically, in this embodiment, the membrane portion 231 receives or conducts the vibration energy of the air in the first cavity 211 and transmits it to the air in the second cavity 50, forming an energy flow, facilitating the transmission of sound energy in a relay manner. The second connecting portion 233 is used to secure the membrane portion 231 and the first connecting portion 232 to the wall of the first fixing hole in the cover plate 22, thereby achieving a secure fixation operation and improving the stability of the elastic member 23.

[0048] In some embodiments of the present invention, as shown in FIG2 , the Tesla channel includes a plurality of first pressure regulating zones A and a plurality of second pressure regulating zones B, wherein the first pressure regulating zones A and the second pressure regulating zones B are spaced and alternately arranged along the circumference of the transducer 11. In this embodiment, the structures of the first pressure regulating zones A and the second pressure regulating zones B are different, but both are arranged in a Tesla structure, wherein the first pressure regulating zones A are used to accelerate the airflow flowing from the second cavity 50 to the outside world and to decelerate the airflow flowing from the outside world to the second cavity 50, and the second pressure regulating zones B are used to decelerate the airflow flowing from the second cavity 50 to the outside world and to accelerate the airflow flowing from the outside world to the second cavity 50.

[0049] Specifically, in this embodiment, as shown in Figure 2, the first pressure regulation zone A can also be referred to as the positive-phase Tesla zone, and the second pressure regulation zone B can be referred to as the negative-phase Tesla zone. When airflow passes through the bass reflex system 100, it can form two phases: when airflow is discharged by the bass reflex system 100, it is referred to as positive-phase airflow; when airflow is drawn into the bass reflex system 100, it is referred to as negative-phase airflow. Precisely because of this, the positive-phase Tesla zone forms a positive-phase acceleration zone (or negative-phase deceleration zone), while the negative-phase Tesla zone forms a negative-phase acceleration zone (or positive-phase deceleration zone). When the positive-phase airflow passes through the positive-phase acceleration zone, it accelerates; when it passes through the negative-phase acceleration zone, it decelerates; the reverse occurs for the negative-phase airflow. In other words, when airflow is discharged by the bass reflex system 100, the positive-phase acceleration zone accelerates, while the negative-phase acceleration zone decelerates. When airflow is drawn into the system, the negative-phase acceleration zone accelerates, while the positive-phase acceleration zone decelerates.

[0050] Specifically, the Tesla channel uses a special loop design. When the fluid flows through the Tesla channel in the forward direction, the fluid will be divided into two paths at each loop intersection. The two fluids will then converge at the next intersection and accelerate. Conversely, if the fluid flows into the Tesla channel in the reverse direction, the fluid will also be divided into two paths at the first intersection and converge again at the second intersection. The difference is that this time, the flow directions of the two fluids are opposite, so a great resistance is formed. Therefore, the Tesla channel can achieve the purpose of forward acceleration and reverse deceleration.

[0051] In some embodiments of the present invention, as shown in FIG2 , the radial dimension of the second fixing hole 121 increases gradually along a first direction, where the first direction is the direction from the cover plate 22 toward the sealing plate 12. In this embodiment, this arrangement facilitates the installation of the transducer 11 into the second cavity 50 from the side of the sealing plate 12 facing away from the cover plate 22, thereby improving the assembly convenience of the transducer 11. In addition, this exponentially increasing surface provides a good diffusion waveguide effect for the sound waves emitted from the front side of the transducer 11 (the side in the first direction).

[0052] In some embodiments of the present invention, the axis of the transducer 11 is arranged to coincide with the axis of the housing 21. In this embodiment, the above arrangement ensures that the transducer 11 is located at the center of the housing 21, allowing the back side of the transducer 11 (the side opposite to the first direction) to uniformly drive the air in the first cavity 211 and uniformly feed back to the elastic member 23, thereby relaying the air in the second cavity 50 and causing it to pass evenly through the Tesla channel, thereby improving the stability of the airflow movement.

[0053] In some embodiments of the present invention, the sealing plate 12, the pressure regulating member 30, and the cover plate 22 are arranged parallel to each other. In this embodiment, this arrangement ensures that the second cavity 50 enclosed by the sealing plate 12, the pressure regulating member 30, and the cover plate 22 has a square ring structure. One end of the square ring structure can receive force from the elastic member 23 and can directly transmit the vibrating airflow to the Tesla channel. The square ring structure can shorten the air flow path, thereby reducing energy loss generated by the air flow and improving the quality of the sound.

[0054] In some embodiments of the present invention, as shown in Figures 3 and 5, a filter element 40 is provided at one end opening of the Tesla channel. The filter element 40 is an annular structure and is disposed around the side of the pressure regulating element 30 facing the second cavity 50. In this embodiment, the filter element 40 can filter the sound inside the bass reflex system 100, removing clutter and unwanted high-frequency harmonics, thereby restoring the resolution and sound quality of the low-frequency region and improving reliability.

[0055] In some embodiments of the present invention, multiple filter elements 40 are provided, and the multiple filter elements 40 are spaced apart and arranged in parallel along the second direction, where the second direction is the direction from the Tesla channel toward the second cavity 50. In this embodiment, the provision of multiple filter elements 40 can significantly filter the sound, thereby reshaping the resolution and sound quality in the low-frequency region and further improving reliability.

[0056] Furthermore, by using the bass reflex system 100 in the present technical solution, a first cavity 211 (front compartment) similar to a cylinder is formed by a shell 21, a cover plate 22 and an elastic member 23. When the transducer 11 is in operation, it can receive audio signals and vibrate. When vibrating, it drives the air inside the first cavity 211 to form airflow and air pressure. The vibrating airflow and air pressure further drive the elastic member 23 that responds to the transducer 11. At the same time, the driven elastic member 23 relays the vibration energy between the first cavity 211 and the second cavity 50. At this time, the first cavity 211 can be compared to the "cylinder" of the engine, that is, the shell assembly is compared to the cylinder body, the transducer 11 is compared to the instigating piston, which is equivalent to the primary piston or the driving piston, the elastic member 23 is compared to the secondary piston or the stress piston, and the internal airflow is compared to the energy fluid. In addition, the first cavity 211 can also be compared to an "AC transformer", that is, the transducer 11 is compared to a primary coil, the internal airflow, i.e., the energy fluid, is compared to the primary current and voltage, the outer shell 21 and the cover 22 are analogous to magnetic flux, and the elastic member 23 is analogous to a secondary coil. The airflow, i.e., the energy fluid, pushed by the elastic member 23 can be compared to the secondary current and voltage.

[0057] Specifically, in the present invention, by using the pressure regulating member 30, on the one hand, during its operation, the energy generated by the positive phase airflow (i.e., the exhaled airflow) from the first cavity 211 is converted to the second cavity 50 through the elastic member 23, and the high-pressure saturated airflow accumulated in the second cavity 50 is forced to enter the filter element 40 for filtration. The filtered airflow then enters the positive phase Tesla area for positive phase pressurization and acceleration processing, and finally outputs low-frequency energy. On the other hand, during its operation, the reverse phase airflow (i.e., the inhaled airflow) from outside the system can be inhaled into the reverse phase Tesla area for reverse phase pressurization and acceleration processing, and the processed airflow is filtered in the filter element 40, and then the filtered airflow is sent to the energy transition zone. At this time, the energy transition zone is just in a low pressure state. After the inhaled airflow, the energy generated is transferred to the first cavity 211, which is also in a low pressure state, through the elastic member 23 to relieve the air pressure in the cabin.

[0058] In summary, the "dual-chamber" bass reflex system 100, or cabinet structure, formed by the first cavity 211 and the second cavity 50, achieves vortex supercharging and jet supercharging through the Tesla channel, while also providing a "filter" effect through the filter element 40 to reshape the sound quality in the low-frequency range. This "dual-chamber" structure is not only a power system within the scope of fluid mechanics; it is also an alternating airflow and pressure-transformation system. When analogized to a power system within the scope of fluid mechanics, this system is like a cylinder; when analogized to an alternating airflow and pressure-transformation system, this system is equivalent to an "AC transformer" for electric current. Within the physics of fluid mechanics and AC transformers, the system formed by the dual-chamber cabinet of the present invention implements analogous and relatable scientific and technological concepts such as "cylinder," "piston," "fluid," "energy exchange," "turbojet," "filter," "accelerator," "primary coil," "current, voltage," "magnetic flux," and "secondary coil."

[0059] In addition, when the system is working, the transducer 11, which is analogous to an instigating piston and a primary coil, emits the original instigating force, namely, "primary airflow and air pressure", and applies elastic kinetic energy to the inside of the shell 21, which is analogous to a cylinder and a magnetic flux, and continues to push the elastic part 23, which is analogous to a stress piston (secondary piston) and a secondary coil, to produce stress vibration, thereby generating "secondary air pressure and airflow" which is analogous to a secondary current and voltage to complete the voltage transformation of the "alternating airflow transformer". The airflow after voltage transformation then enters the pressure regulating part 30 for post-processing such as filtration and pressurization acceleration. Finally, the airflow is discharged from the outside of the entire bass reflex system 100 in the required posture and at a rate higher than the traditional rate, and couples with the external space to output low-frequency energy.

[0060] Furthermore, the bass reflex system 100 in the present invention is a flat-panel structure as a whole, which is suitable for being placed in a small space or hanging on the ceiling and wall. Its compact size improves the applicability of application scenarios.

[0061] The present invention also provides a sound speaker device, comprising the above-mentioned bass reflex system 100.

[0062] By using the loudspeaker device in the present technical solution, the bass reflex system 100 of the loudspeaker device adopts a combined structure of a transducer component 10, a shell component and a pressure regulating component 30. The transducer end of the transducer component 10 can receive audio signals and generate vibrations, thereby driving the airflow in the first cavity 211. At the same time, the vibrating air will act on the elastic component 23 on the shell component cover 22. The elastic component 23 can relay the airflow in the first cavity 211 to the second cavity 50. Then, the vibrating airflow in the second cavity 50 is transmitted to the outside through the Tesla channel. Since the Tesla channel structure has the effect of unidirectional acceleration or unidirectional deceleration, in order to achieve the purpose of pressure regulation of the airflow, the airflow will finally be discharged from the bass reflex system 100 component in the required posture and at a higher rate than the traditional one, and coupled with the external space to output low-frequency energy, thereby improving the bass reflex capability and sound effect.

[0063] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A bass reflex system, characterized in that, include: Transducer assembly; A shell assembly, the shell assembly comprising a shell and a cover plate, the shell defines a first cavity with an open end, the cover plate is arranged at the open end, a first fixing hole is arranged on the cover plate, and an elastic member is sealed at the first fixing hole; A pressure regulating member, wherein the pressure regulating member is sandwiched between the transducer assembly and the cover plate, wherein one end of the transducer assembly passes through the regulating member and the elastic member in sequence and is located in the first cavity, and a second cavity is formed between the transducer assembly, the pressure regulating member and the elastic member, and the pressure regulating member has a Tesla channel, wherein one end of the Tesla channel is connected to the second cavity, and the other end of the Tesla channel is connected to the outside.

2. The bass reflex system according to claim 1, wherein The transducer assembly includes a transducer and a sealing plate, a second fixing hole is provided on the sealing plate, one end of the transducer passes through the pressure regulating member and the elastic member in sequence and is located in the first cavity, the other end of the transducer is sealed in the second fixing hole, and the second cavity is formed among the transducer, the sealing plate, the elastic member and the pressure regulating member.

3. The bass reflex system according to claim 2, characterized in that, The elastic part includes a membrane body, a first connecting part and a second connecting part. The inner side of the membrane body is connected to the first connecting part. The first connecting part has a hollow structure therein. The hollow structure is sealed with the transducer. The outer side of the membrane body is connected to the second connecting part. The side of the second connecting part facing away from the membrane body is connected to the hole wall of the first fixing hole.

4. The bass reflex system according to claim 2, characterized in that, The Tesla channel includes a plurality of first pressure regulating areas and a plurality of second pressure regulating areas, wherein the first pressure regulating areas and the second pressure regulating areas are spaced and alternately arranged along the circumference of the transducer; The first pressure regulating zone is used to accelerate the airflow flowing from the second cavity to the outside, and to decelerate the airflow flowing from the outside to the second cavity. The second pressure regulating zone is used to decelerate the airflow flowing from the second cavity to the outside, and to accelerate the airflow flowing from the outside to the second cavity.

5. The bass reflex system according to claim 2, wherein The radial dimension of the second fixing hole increases gradually along a first direction, and the first direction is a direction from the cover plate toward the sealing plate.

6. The bass reflex system according to claim 2, characterized in that, The axis of the transducer and the axis of the housing are arranged to coincide with each other.

7. The bass reflex system according to claim 2, wherein, The sealing plate, the pressure regulating member and the cover plate are arranged in parallel in pairs.

8. The bass reflex system according to claim 1, characterized in that, A filter is provided at an opening at one end of the Tesla channel. The filter is an annular structure. The annular structure is arranged on a side of the pressure regulating component facing the second cavity.

9. The bass reflex system according to claim 8, wherein There are multiple filter elements, and the multiple filter elements are arranged in parallel and spaced apart along a second direction, and the second direction is the direction of the Tesla channel toward the second cavity.

10. A loudspeaker device, characterized in that, A bass reflex system comprising the following:

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