Acoustic cavity structure and electronic device

Abstract

The utility model provides a kind of acoustic cavity structure and electronic equipment, acoustic cavity structure includes: shell subassembly, inner shell subassembly, sound production subassembly and sound acquisition subassembly;Shell subassembly inside has installation cavity, shell subassembly still has the sound production hole being communicated with installation cavity on it;Shell subassembly still has the through window being communicated with installation cavity on it, at least a part of inner shell subassembly is arranged in installation cavity;Inner shell subassembly has sound acquisition hole, sound acquisition hole is communicated with the outside of shell subassembly by through window;Sound acquisition subassembly is arranged in inner shell subassembly, and is communicated with sound acquisition hole;Sound production subassembly is arranged in installation cavity, and is spaced apart from inner shell subassembly;The orientation of sound production hole and the orientation of sound acquisition hole have included angle.The utility model solves the problem that the sound cavity structure of small outdoor electronic equipment in prior art usually exists emitted sound can appear larger loss, emitted and collected sound is easy to appear coupling and easy to appear structural resonance.

Description

Technical Field

[0001] This utility model relates to the field of audio cavity structure technology, and more specifically, to a cavity structure and electronic device. Background Technology

[0002] In the design of small outdoor electronic devices (such as outdoor surveillance cameras), the design of the acoustic cavity structure faces many challenges, especially in balancing audio quality and waterproof performance.

[0003] Currently, the acoustic cavity structure design of existing small outdoor electronic devices typically suffers from the following problems: 1. Significant sound loss occurs; in existing small outdoor cameras, if the front acoustic cavity between the speaker unit and the front shell is poorly sealed, it can easily lead to acoustic short circuits. This means there is no effective barrier between the front and rear acoustic cavities of the speaker, forming a sealed shared cavity. In this case, the sound propagation path inside the cavity becomes abnormally short, resulting in degraded sound quality, unclear sound, and noise, severely affecting the output quality of the audio signal. Furthermore, leakage in the front acoustic cavity—that is, sound leakage not only through the sound outlet but also through other paths—can also lead to a decrease in sound quality, making the sound muffled and unclear; 2. Coupling problems can easily occur between the emitted and received sounds; Outdoor equipment is usually equipped with a high-sensitivity, omnidirectional microphone and a speaker unit that emits sound in the 20Hz-8KHz frequency band; Due to the size limitations inside outdoor electronic equipment, the speaker and microphone are often housed in the same cavity. This layout allows the sound emitted by the speaker to be easily captured by the microphone through reflection and refraction within the cavity, especially during full-duplex intercom (i.e., when the speaker and microphone are working simultaneously). This not only affects echo cancellation The algorithm places higher demands on users and may lead to excessive echo suppression, making it difficult for distant users to clearly hear the voices of nearby users. This manifests as dropped or swallowed words, severely affecting the audio quality of full-duplex intercom. 3. It is prone to structural resonance problems. When the speaker unit is working, its own vibration is transmitted through the cavity shell to the solid, which can easily cause resonance in other structural components inside the cavity, especially at the F0 frequency of the speaker, which is the frequency with the most concentrated energy. Abnormal sounds generated by structural resonance are easily captured by the microphone. At the same time, the resonance can also be transmitted through the solid to the microphone position, causing nonlinear distortion in the sound quality captured by the microphone, affecting the clarity and quality of the audio.

[0004] Therefore, the existing acoustic cavity structure design of small outdoor electronic devices usually suffers from problems such as significant sound loss, easy coupling between emitted and collected sound, and structural resonance, which urgently need to be solved. Utility Model Content

[0005] This invention provides a sound cavity structure and electronic device to at least solve the problems that the sound cavity structure of small outdoor electronic devices in the prior art is prone to coupling between emitted and collected sounds and structural resonance.

[0006] To address the aforementioned problems, according to one aspect of this utility model, a sound cavity structure is provided, comprising: an outer shell assembly, an inner shell assembly, a sound-emitting assembly, and a sound-collecting assembly; the outer shell assembly has an internal mounting cavity, and the outer shell assembly also has a sound-emitting hole communicating with the mounting cavity, the sound-emitting assembly being sealed to the end of the sound-emitting hole and the mounting cavity; the outer shell assembly also has a through window communicating with the mounting cavity, at least a portion of the inner shell assembly being disposed within the mounting cavity; the inner shell assembly has a sound-collecting hole, the sound-collecting hole communicating with the outside of the outer shell assembly through the through window; the sound-collecting assembly is disposed within the inner shell assembly and communicates with the sound-collecting hole, the sound-collecting assembly being sealed to the sound-collecting hole; wherein, the sound-emitting assembly and the sound-collecting assembly are respectively sealed and waterproof; the sound-emitting assembly is disposed within the mounting cavity and spaced apart from the inner shell assembly; the orientation of the sound-emitting hole and the orientation of the sound-collecting hole form an angle.

[0007] Furthermore, the sound-generating component includes a porous waterproof component, a sealing housing, and a sound-generating diaphragm disposed inside the sealing housing. The sound-generating diaphragm divides the interior of the sealing housing into a front sound cavity and a rear sound cavity, with the front sound cavity facing the sound-generating hole. The sound-generating diaphragm is used to vibrate and generate sound. The porous waterproof component is disposed inside the front sound cavity and fixed at the connecting end between the sound-generating hole and the mounting cavity to prevent water from entering the mounting cavity.

[0008] Furthermore, the porous waterproof component is waterproof foam; the sound-generating assembly also includes a first adhesive and a second adhesive; the outer side of the sealing shell facing the sound-generating hole has a positioning groove, one side of the first adhesive is pasted and fixed in the positioning groove, the other side of the first adhesive is pasted and fixed in one side of the waterproof foam, the other side of the waterproof foam is pasted in one side of the second adhesive, and the other side of the second adhesive is pasted and fixed in the connecting end between the sound-generating hole and the mounting cavity; wherein, the sound emitted by the sound-generating diaphragm passes sequentially through the first adhesive, the waterproof foam, the second adhesive, and the sound-generating hole to the outside of the outer shell assembly; the thickness of the first adhesive and / or the second adhesive is not less than 0.5 mm; the thickness of the waterproof foam is not less than 0.3 mm.

[0009] Furthermore, the sound-generating component also includes a first waterproof and breathable membrane, and the sealing housing also has vent holes, which are respectively connected to the outside of the sound-generating component and the rear sound cavity; the first waterproof and breathable membrane is disposed at the vent holes to make the vent holes waterproof; wherein, the vent holes are located in the middle of one end face of the sealing housing; the end of the vent holes facing the outside of the sealing housing has a sealing groove, and the first waterproof and breathable membrane is fixedly disposed in the sealing groove; and / or, the sealing housing includes a first housing and a second housing, the first housing has a positioning protrusion, and the second housing has a positioning groove, the positioning protrusion and the positioning groove being mutually restrictive; or, the first housing has a positioning groove, and the second housing has a positioning protrusion, the positioning protrusion and the positioning groove being mutually restrictive; wherein, the gap between the positioning protrusion and the positioning groove is sealed by dispensing adhesive to seal and fix the first housing and the second housing.

[0010] Furthermore, the sound-generating component also includes a circuit board disposed inside the sealed housing and a transmission cable connected to the circuit board, the transmission cable being used for external connection; the sealed housing has a cable hole communicating with the interior of the sealed housing, and a portion of the transmission cable extends out of the sealed housing through the cable hole; wherein, the transmission cable is a B-type twisted pair cable; the cable hole is located on the side wall of the sealed housing, and the cable hole is sealed with glue to seal the sealed housing.

[0011] Furthermore, the orientation of the sound-emitting hole is perpendicular to the orientation of the sound-collecting hole; the sound-emitting hole includes multiple circular holes, which are spaced apart to form an array; the diameter of the circular holes is greater than or equal to 0.5 mm and less than or equal to 1.5 mm; the total cross-sectional area of ​​the multiple circular holes is greater than or equal to 20% of the cross-sectional area of ​​the sound-emitting diaphragm; and / or, the housing assembly has annular ribs and multiple reinforcing ribs inside, the annular ribs are disposed on the inner wall of the mounting cavity and are arranged around the circumference of the sound-emitting hole; at least a portion of the porous waterproof component is disposed inside the annular ribs; the reinforcing ribs are fixedly disposed on the inner wall of the mounting cavity, the multiple reinforcing ribs are spaced apart circumferentially along the annular ribs, and the reinforcing ribs extend radially along the annular ribs; and / or, the mounting cavity includes a constraint cavity, at least a portion of the sealing housing is disposed in the constraint cavity and is limited and matched with the inner wall of the constraint cavity; when the sound-emitting diaphragm vibrates to generate sound, the inner wall of the constraint cavity suppresses the overall vibration of the sound-generating assembly.

[0012] Furthermore, the inner shell assembly has a hollow column inside, and the hollow column has a hollow cavity inside, which is connected to the sound acquisition hole; the sound acquisition assembly includes a silicone sleeve and a microphone, the silicone sleeve covers the outside of the microphone, the silicone sleeve is set inside the hollow cavity, and the microphone is set facing the sound acquisition hole; the silicone sleeve and the inner wall of the hollow cavity are sealed and fixed with glue.

[0013] Furthermore, the sound acquisition component also includes a second waterproof and breathable membrane, sealing foam, a third adhesive backing, a fourth adhesive backing, and a fifth adhesive backing; one side of the third adhesive backing is adhered and fixed to the outer surface of the silicone sleeve, the other side of the third adhesive backing is adhered and fixed to one side of the sealing foam, the other side of the sealing foam is adhered and fixed to one side of the fourth adhesive backing, the other side of the fourth adhesive backing is adhered and fixed to one side of the waterproof and breathable membrane, the other side of the waterproof and breathable membrane is adhered and fixed to one side of the fifth adhesive backing, and the other side of the fifth adhesive backing is adhered and fixed to the connection between the hollow cavity and the sound acquisition hole; wherein, external sound passes sequentially through the fifth adhesive backing, the second waterproof and breathable membrane, the fourth adhesive backing, the sealing foam, and the third adhesive backing to be transmitted into the microphone; the thickness of at least one of the third, fourth, and fifth adhesive backings is not less than 0.05mm; the microphone is connected to the outside through a pickup channel, the pickup channel including a portion of the hollow cavity and the sound acquisition hole, and the axial length of the pickup channel is less than 5mm.

[0014] According to another aspect of the present invention, an electronic device is provided, the electronic device including the above-described acoustic cavity structure; the electronic device also includes a driving component, the inner shell component is rotatably disposed in the mounting cavity, the driving component is drivingly connected to the inner shell component, and is used to drive the inner shell component to rotate.

[0015] Furthermore, the electronic device also includes a camera, at least a portion of which is disposed within the inner housing assembly, and the camera receives light through a through-window; at least a portion of the outer side of the inner housing assembly is arc-shaped; wherein the orientation of the sound acquisition hole is the same as that of the camera.

[0016] Applying the technical solution of this utility model, this utility model provides a sound cavity structure, including: an outer shell assembly, an inner shell assembly, a sound-emitting assembly, and a sound-collecting assembly; the outer shell assembly has an internal mounting cavity, and the outer shell assembly also has a sound-emitting hole communicating with the mounting cavity, the sound-emitting assembly sealingly engaging with the sound-emitting hole and the connecting end of the mounting cavity; the outer shell assembly also has a through window communicating with the mounting cavity, at least a portion of the inner shell assembly is disposed within the mounting cavity; the inner shell assembly has a sound-collecting hole, the sound-collecting hole communicating with the outside of the outer shell assembly through the through window; the sound-collecting assembly is disposed within the inner shell assembly and communicates with the sound-collecting hole, the sound-collecting assembly sealingly engaging with the sound-collecting hole; wherein, the sound-emitting assembly and the sound-collecting assembly are respectively sealed and waterproof; the sound-emitting assembly is disposed within the mounting cavity and spaced apart from the inner shell assembly; the orientation of the sound-emitting hole and the orientation of the sound-collecting hole form an angle.

[0017] This invention, by placing the sound-generating component within the mounting cavity and spacing it from the inner shell assembly, effectively isolates the sound-generating component and the sound-collecting component within two chambers. This avoids coupling between the sound emitted by the sound-generating component and the sound collected by the sound-collecting component. The two-chamber layout also prevents the sound emitted by the sound-generating component from being captured by the sound-collecting component through reflection and refraction within the chambers. Furthermore, this two-chamber layout avoids structural resonance issues, preventing abnormal sounds generated by structural resonance from being captured by the sound-collecting component, thus ensuring the authenticity, clarity, and quality of the acquired sound. This design ensures that the sound transmitted from the sound-generating component does not diffuse into the inner shell component and is lost, thus avoiding acoustic coupling with the acoustic path of the inner shell component. By setting the orientation of the sound-generating hole to have an angle with the orientation of the sound-collecting hole, the requirements for the relative position and isolation of the sound-generating position and sound-collecting position in the acoustic structure are met. In full-duplex intercom, this facilitates further processing by the echo cancellation algorithm, effectively reducing nonlinear distortion caused by solid-borne propagation. This makes the sound transmitted from the sound-generating component clearer and cleaner, with higher sound recognition, while also making the low frequencies fuller and the sound more magnetic, thereby improving the overall audio effect of the electronic device. This invention features a simple and low-cost structure, facilitating assembly and subsequent maintenance. It addresses the common problems in existing small outdoor electronic devices, such as significant sound loss, coupling between emitted and collected sounds, and structural resonance. This invention provides a more optimized technical solution for the existing acoustic cavity structure design of small outdoor cameras, effectively improving audio output and input effects, reducing echo, and enhancing waterproof performance. It achieves a high-fidelity, echo-free, waterproof, and compact acoustic cavity design, making it suitable for large-scale promotion and use. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic diagram of the external structure of the electronic device provided in an embodiment of the present invention is shown;

[0020] Figure 2 A schematic diagram of the external structure of the sound-generating component provided in an embodiment of the present invention is shown;

[0021] Figure 3 A schematic diagram of the internal structure of the sound-generating component provided in an embodiment of the present invention is shown;

[0022] Figure 4An exploded view of a portion of the structure of the sound-generating component provided in an embodiment of the present invention is shown;

[0023] Figure 5 A partial structural schematic diagram of the housing assembly provided in an embodiment of the present invention is shown;

[0024] Figure 6 It shows Figure 5 A magnified view of a section at point A in the middle;

[0025] Figure 7 An external schematic diagram of the acoustic cavity structure provided in an embodiment of the present invention is shown;

[0026] Figure 8 A schematic diagram of the internal structure of a portion of the acoustic cavity structure provided in an embodiment of this utility model is shown.

[0027] Figure 9 A schematic diagram of the internal structure of the sound acquisition component provided in an embodiment of the present invention is shown;

[0028] Figure 10 A schematic diagram of the external structure of the inner shell assembly and camera provided in an embodiment of the present invention is shown.

[0029] The above figures include the following reference numerals:

[0030] 10. Outer shell assembly; 11. Mounting cavity; 12. Sound outlet; 13. Through window; 14. Circular rib; 15. Reinforcing rib; 16. Constraint cavity;

[0031] 20. Inner shell assembly; 21. Sound acquisition hole; 22. Hollowed-out column; 221. Hollowed-out cavity; 23. Sound pickup channel;

[0032] 30. Sound-generating component; 31. Sealed housing; 311. Front sound cavity; 312. Rear sound cavity; 313. Positioning groove; 314. Vent hole; 315. Sealing groove; 316. First housing; 317. Second housing; 318. Cable hole; 32. Sound-generating diaphragm; 33. First waterproof and breathable membrane; 34. Transmission cable;

[0033] 40. Sound acquisition component; 41. Microphone; 42. Second waterproof and breathable membrane; 43. Sealing foam; 44. Third adhesive backing; 45. Fourth adhesive backing; 46. Fifth adhesive backing;

[0034] 50. Camera. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0036] like Figures 1 to 10 As shown, an embodiment of this utility model provides a sound cavity structure, including: an outer shell assembly 10, an inner shell assembly 20, a sound-emitting assembly 30, and a sound-collecting assembly 40; the outer shell assembly 10 has a mounting cavity 11 inside, and the outer shell assembly 10 also has a sound-emitting hole 12 communicating with the mounting cavity 11; the sound-emitting assembly 30 is sealed to the end of the sound-emitting hole 12 and the mounting cavity 11; the outer shell assembly 10 also has a through window 13 communicating with the mounting cavity 11, and at least a portion of the inner shell assembly 20 is disposed within the mounting cavity 11; the inner shell assembly... The component 20 has a sound acquisition hole 21, which communicates with the outside of the outer shell assembly 10 through a through window 13; the sound acquisition component 40 is disposed inside the inner shell assembly 20 and communicates with the sound acquisition hole 21, and the sound acquisition component 40 and the sound acquisition hole 21 are sealed together; the sound-emitting component 30 and the sound acquisition component 40 are respectively sealed and waterproof; the sound-emitting component 30 is disposed inside the mounting cavity 11 and is spaced apart from the inner shell assembly 20; the orientation of the sound-emitting hole 12 is at an angle to the orientation of the sound acquisition hole 21.

[0037] This invention, by setting the sound-emitting component 30 within the mounting cavity 11 and spaced apart from the inner shell component 20, effectively separates the sound-emitting component 30 and the sound-collecting component 40 within two cavities. This avoids coupling between the sound emitted by the sound-emitting component 30 and the sound collected by the sound-collecting component 40. The two-cavity layout also prevents the sound emitted by the sound-emitting component 30 from being captured by the sound-collecting component 40 through reflection and refraction within the cavities. Furthermore, this two-cavity layout avoids structural resonance, preventing abnormal sounds generated by structural resonance from being captured by the sound-collecting component 40, thus ensuring the authenticity, clarity, and quality of the collected sound. The sound from the sound-emitting component 30 is transmitted in a way that prevents it from diffusing into the inner shell component 20 and being lost, thus avoiding acoustic coupling with the acoustic path of the inner shell component 20. By setting the orientation of the sound-emitting hole 12 to have an angle with the orientation of the sound-collecting hole 21, the requirements for the relative position and isolation of the sound-emitting position and the sound-collecting position in the acoustic structure are met. In full-duplex intercom, this is beneficial for further processing of the echo cancellation algorithm, effectively reducing the nonlinear distortion caused by solid propagation. This makes the sound transmitted from the sound-emitting component 30 clearer and cleaner, with higher sound recognition, while also making the low frequencies fuller and the sound more magnetic, thereby improving the overall audio effect of the electronic device. This invention features a simple and low-cost structure, facilitating assembly and subsequent maintenance. It addresses the common problems in existing small outdoor electronic devices, such as significant sound loss, coupling between emitted and collected sounds, and structural resonance. This invention provides a more optimized technical solution for the existing acoustic cavity structure design of small outdoor cameras, effectively improving audio output and input effects, reducing echo, and enhancing waterproof performance. It achieves a high-fidelity, echo-free, waterproof, and compact acoustic cavity design, making it suitable for large-scale promotion and use.

[0038] It should be noted that the sound emitted by the sound-emitting component 30 is transmitted to the outside of the housing component 10 through the sound-emitting hole 12; external sound enters the sound-collecting component 40 through the sound-collecting hole 21, and the sound-collecting component 40 is used to collect sound.

[0039] like Figure 2 , Figure 3 and Figure 4 As shown, the sound-generating assembly 30 includes a porous waterproof component, a sealing housing 31, and a sound-generating diaphragm 32 disposed inside the sealing housing 31. The sound-generating diaphragm 32 divides the interior of the sealing housing 31 into a front sound cavity 311 and a rear sound cavity 312. The front sound cavity 311 is disposed facing the sound-generating hole 12. The sound-generating diaphragm 32 is used to vibrate and generate sound. The porous waterproof component is disposed inside the front sound cavity 311 and fixed at the connecting end between the sound-generating hole 12 and the mounting cavity 11 to prevent water from entering the mounting cavity 11.

[0040] By incorporating a porous waterproof component into the sound-generating assembly, moisture is effectively prevented from entering the mounting cavity 11 while ensuring normal sound propagation. The use of the porous waterproof component satisfies waterproofing requirements without affecting sound wave penetration, ensuring clear sound quality. This design allows the sound-generating assembly 30 to not only be waterproof but also maintain good audio output performance, improving the reliability of the electronic device in outdoor environments. In other embodiments, waterproofing performance and sound quality can be further enhanced by using porous waterproof components of different materials and structures, and by adjusting their position within the sound-generating assembly.

[0041] like Figure 2 , Figure 3 and Figure 4 As shown, the porous waterproof component is waterproof foam; the sound-generating assembly 30 also includes a first adhesive and a second adhesive; the outer side of the sealing housing 31 facing the sound-generating hole 12 has a positioning groove 313, one side of the first adhesive is pasted and fixed in the positioning groove 313, the other side of the first adhesive is pasted and fixed in the waterproof foam, the other side of the waterproof foam is pasted in the second adhesive, and the other side of the second adhesive is pasted and fixed in the connecting end of the sound-generating hole 12 and the mounting cavity 11; wherein, the sound emitted by the sound-generating diaphragm 32 passes through the first adhesive, the waterproof foam, the second adhesive, and the sound-generating hole 12 in sequence and is transmitted to the outside of the housing assembly 10; the thickness of the first adhesive and / or the second adhesive is not less than 0.5mm; the thickness of the waterproof foam is not less than 0.3mm.

[0042] The use of adhesive backing and waterproof foam not only enhances waterproof performance but also ensures smooth sound transmission and prevents sound attenuation. The adhesive backing provides excellent adhesion and waterproofing, while the waterproof foam, with its porous structure, allows sound waves to pass through while preventing moisture penetration. This technical solution effectively reduces sound loss during transmission while ensuring the device's waterproofness and improving audio output quality. In other embodiments, by adjusting the material and thickness of the adhesive backing and waterproof foam, or by using other types of waterproof materials, specific waterproof ratings and sound quality requirements can be met, solving the technical problem of low sound transmission efficiency under high waterproofing requirements.

[0043] like Figure 2 , Figure 3 and Figure 4As shown, the sound-generating assembly 30 also includes a first waterproof and breathable membrane 33, and the sealing housing 31 also has a vent 314, which communicates with the outside of the sound-generating assembly 30 and the rear sound cavity 312 respectively; the first waterproof and breathable membrane 33 is disposed at the vent 314 to make the vent 314 waterproof; wherein, the vent 314 is located in the middle of one end face of the sealing housing 31; the end of the vent 314 facing the outside of the sealing housing 31 has a sealing groove 315, and the first waterproof and breathable membrane 33 is fixedly disposed on the sealing groove. The groove 315 is located within the space; and / or, the sealing housing 31 includes a first housing 316 and a second housing 317, the first housing 316 having a positioning protrusion and the second housing 317 having a positioning groove, the positioning protrusion engaging with the positioning groove for a limiting fit; or, the first housing 316 having a positioning groove and the second housing 317 having a positioning protrusion, the positioning protrusion engaging with the positioning groove for a limiting fit; wherein, the gap between the positioning protrusion and the positioning groove is sealed by dispensing adhesive to seal and fix the first housing 316 and the second housing 317.

[0044] The application of a waterproof and breathable membrane and the structural design of the housing ensure pressure balance within the sound-generating component 30 while preventing moisture intrusion. The waterproof and breathable membrane allows airflow to balance pressure while preventing moisture penetration, and the limiting fit of the housing provides structural stability and sealing. This technical solution enables the sound-generating component 30 to maintain good acoustic performance while remaining waterproof, avoiding sound distortion caused by pressure imbalance. In other embodiments, the type and size of the waterproof and breathable membrane, or the structural design of the housing, can be changed to adapt to different waterproof and acoustic requirements, thus solving the technical problem of unstable sound output under waterproof conditions.

[0045] like Figure 2 , Figure 3 and Figure 4 As shown, the sound-generating assembly 30 also includes a circuit board disposed inside the sealed housing 31 and a transmission cable 34 connected to the circuit board. The transmission cable 34 is used for connection to the outside. The sealed housing 31 has a cable hole 318, which communicates with the interior of the sealed housing 31. A portion of the transmission cable 34 extends out of the sealed housing 31 through the cable hole 318. The transmission cable 34 is a twisted pair of bulletproof wire. The cable hole 318 is located on the side wall of the sealed housing 31, and the cable hole 318 is sealed with glue to seal the sealed housing 31.

[0046] The circuit board and transmission cable 34 of the sound-generating component 30 are cleverly designed inside and outside the sealed housing 31, achieving an efficient combination of sound generation and signal transmission. As the core control part of the sound-generating component 30, the circuit board carries the key circuitry that drives the sound-generating diaphragm 32 to vibrate and generate sound, while the transmission cable 34 is used to connect the circuit board to external devices or power sources, ensuring stable transmission of sound signals and power supply.

[0047] Of particular note is that the transmission cable 34 uses a bulletproof twisted pair cable, which has extremely high durability and tensile strength, and can maintain good signal transmission performance in complex outdoor environments. Even when subjected to external impact, wear or extreme weather conditions, it can effectively prevent cable breakage or signal interference, thereby ensuring the reliability and stability of electronic equipment used outdoors.

[0048] The cable hole 318 further embodies the waterproof design concept of this utility model. The cable hole 318 is connected to the interior of the sealing housing 31, allowing the transmission cable 34 to smoothly extend from the inside of the sound-generating assembly 30 without compromising the overall waterproof performance of the sealing housing 31. By providing the cable hole 318 on the side wall of the sealing housing 31, direct water intrusion from the top or bottom can be prevented. At the same time, the cable hole 318 is sealed with glue, ensuring that the waterproof performance of the sealing housing 31 is maintained even in the area where the transmission cable 34 passes. This effectively prevents water or other liquids from entering the interior of the sound-generating assembly 30, protecting critical components such as the sound-generating diaphragm 32 and the circuit board, and extending the service life of the entire electronic device.

[0049] like Figure 1 , Figure 5 and Figure 7 As shown, the orientation of the sound-emitting hole 12 is perpendicular to the orientation of the sound-collecting hole 21; the sound-emitting hole 12 includes multiple circular holes, which are spaced apart to form an array; the diameter of the circular holes is greater than or equal to 0.5 mm and less than or equal to 1.5 mm; the total cross-sectional area of ​​the multiple circular holes is greater than or equal to 20% of the cross-sectional area of ​​the sound-emitting diaphragm 32; and / or, as shown Figure 5 and Figure 6 As shown, the housing assembly 10 has an annular rib 14 and multiple reinforcing ribs 15 inside. The annular rib 14 is disposed on the inner wall of the mounting cavity 11 and is arranged around the circumference of the sound-generating hole 12. At least a portion of the porous waterproof component is disposed inside the annular rib 14. The reinforcing ribs 15 are fixedly disposed on the inner wall of the mounting cavity 11, and the multiple reinforcing ribs 15 are spaced apart circumferentially along the annular rib 14 and extend radially along the annular rib 14. And / or, the mounting cavity 11 includes a constraint cavity 16, at least a portion of the sealing housing 31 is disposed in the constraint cavity 16 and is limited and matched with the inner wall of the constraint cavity 16. When the sound-generating diaphragm 32 vibrates to generate sound, the inner wall of the constraint cavity 16 suppresses the overall vibration of the sound-generating assembly 30.

[0050] By controlling the direction and layout of the sound-emitting hole 12 and the sound-collecting hole 21, and by adding the annular rib 14 and the reinforcing rib 15, the sound propagation path is optimized, structural stability is enhanced, and vibration is reduced. The vertically positioned holes prevent direct sound coupling, while the reinforcing rib 15 and the annular rib 14 reduce vibration of the sound-emitting component 30 through structural reinforcement. The above technical solution effectively improves the clarity of the audio output while enhancing the overall stability of the device and reducing sound quality problems caused by vibration. In other embodiments, the shape, size, and direction of the sound-emitting hole 12 and the sound-collecting hole 21, or the layout of the reinforcing rib 15 and the annular rib 14, can be adjusted to further improve sound quality and device durability, solving the technical problem of balancing sound quality and structural stability in small devices.

[0051] like Figure 8 As shown, the inner shell assembly 20 has a hollow column 22 inside, and the hollow column 22 has a hollow cavity 221 inside, which is connected to the sound acquisition hole 21; the sound acquisition assembly 40 includes a silicone sleeve and a microphone 41, the silicone sleeve covers the outside of the microphone 41, the silicone sleeve is set inside the hollow cavity 221, and the microphone 41 is set facing the sound acquisition hole 21; the silicone sleeve and the inner wall of the hollow cavity 221 are sealed and fixed with glue.

[0052] By incorporating hollow pillars 22 and hollow cavities 221 within the inner shell assembly, and by covering the microphone 41 with a silicone sleeve, the sound acquisition component achieves both waterproofing and effective sound acquisition. The silicone sleeve provides excellent waterproofing and acoustic conductivity, while the hollow pillars 22 and hollow cavities 221 provide a sound transmission path. In terms of effectiveness, the above technical solution enables the sound acquisition component 40 to effectively acquire sound while maintaining good waterproofing performance, thus improving the clarity of audio input. In other embodiments, by changing the material and thickness of the silicone sleeve, or adjusting the structure of the hollow pillars 22 and hollow cavities 221, specific waterproofing and acoustic performance requirements can be met, addressing the technical problem of decreased sound acquisition quality in high humidity environments.

[0053] like Figure 9As shown, the sound acquisition component 40 also includes a second waterproof and breathable membrane 42, a sealing foam 43, a third adhesive 44, a fourth adhesive 45, and a fifth adhesive 46. One side of the third adhesive 44 is adhered and fixed to the outer surface of the silicone sleeve, and the other side of the third adhesive 44 is adhered and fixed to one side of the sealing foam 43. The other side of the sealing foam 43 is adhered and fixed to one side of the fourth adhesive 45. The other side of the fourth adhesive 45 is adhered and fixed to one side of the waterproof and breathable membrane, and the other side of the waterproof and breathable membrane is adhered and fixed to one side of the fifth adhesive 46. The other side of the fifth adhesive 46 is adhered to... The adhesive is fixed at the connection between the hollow cavity 221 and the sound acquisition hole 21; wherein, external sound passes sequentially through the fifth adhesive 46, the second waterproof and breathable membrane 42, the fourth adhesive 45, the sealing foam 43, and the third adhesive 44 to the microphone 41; the thickness of at least one of the third adhesive 44, the fourth adhesive 45, and the fifth adhesive 46 is not less than 0.05mm; the microphone 41 is connected to the outside through the sound pickup channel 23, which includes a part of the hollow cavity 221 and the sound acquisition hole 21, and the axial length of the sound pickup channel 23 is less than 5mm.

[0054] Technically, the use of multi-layer adhesive backing and a waterproof and breathable membrane, along with the sealing foam 43, further enhances the waterproof performance of the sound acquisition component 40 while ensuring effective sound acquisition. The combination of adhesive backing and a waterproof and breathable membrane, along with the application of sealing foam 43, forms multiple waterproof barriers while ensuring the normal transmission of sound signals. In terms of effectiveness, the above technical solution significantly improves the waterproof capability and audio input quality of the sound acquisition component, making it suitable for high-humidity environments such as outdoors. In other embodiments, the number and material of the adhesive backing and waterproof and breathable membrane, or the specific shape and position of the sealing foam 43, can be adjusted to adapt to different waterproof requirements and acoustic performance requirements, solving the technical problem of unstable sound acquisition under extreme weather conditions.

[0055] like Figure 1 , Figure 7 and Figure 10 As shown, this utility model also provides an electronic device, which includes the above-mentioned acoustic cavity structure; the electronic device also includes a driving component, the inner shell component 20 is rotatably disposed in the mounting cavity 11, and the driving component is drivingly connected to the inner shell component 20 for driving the inner shell component 20 to rotate.

[0056] Technically, by setting up a drive component and a rotatable inner shell component 20, the device's functions are diversified, such as automatic tracking and rotation. The drive component, connected to the inner shell component 20, can control the rotation of the inner shell component 20, thereby adjusting the direction of the sound acquisition port. In terms of effectiveness, the above technical solution enables the electronic device to have more application scenarios, such as intelligent monitoring and remote communication, while maintaining good sound quality and waterproof performance. In other embodiments, by changing the type of drive component, such as using a motor or stepper motor, or optimizing the rotation mechanism of the inner shell component, specific functional requirements and usage scenarios can be met, solving the technical problem of balancing sound quality and waterproof performance in multifunctional devices.

[0057] like Figure 1 , Figure 7 and Figure 10 As shown, the electronic device also includes a camera 50, at least a portion of which is disposed within the inner housing assembly 20, and the camera 50 receives light through the through window 13; at least a portion of the outer side of the inner housing assembly 20 is arc-shaped; wherein, the orientation of the sound acquisition hole 21 is the same as that of the camera 50.

[0058] By placing the camera 50 within the inner housing assembly 20 and aligning it with the audio acquisition port 21, simultaneous audio and video acquisition is achieved, improving the device's integration and efficiency. The aligned orientation of the audio acquisition port 21 and the camera 50 ensures accurate capture of video information while acquiring audio, preventing misalignment between audio and video information. This technical solution enables electronic devices to simultaneously provide high-quality audio and video services, suitable for scenarios such as intelligent monitoring and remote conferencing. In other embodiments, the position and orientation of the camera can be adjusted, or the shape of the inner housing assembly can be optimized, to meet specific usage requirements and scenarios, solving the technical problem of difficult simultaneous audio and video acquisition in integrated devices.

[0059] The working process and design principle of a specific embodiment of this utility model will now be described in detail as follows:

[0060] The sound-generating component 30 adopts a loudspeaker sound-generating unit, including a magnet, voice coil, washer, sound-generating diaphragm 32, bulletproof twisted-pair cable, terminals, PCB circuit board, etc. The front sound cavity 311 has a sound-generating diaphragm 32, 0.3mm thick waterproof foam, 0.5mm thick first adhesive, and 0.5mm thick second adhesive inside. The upper surface of the sealing shell 31 has a positioning groove 313. The lower surface of the first adhesive is attached to the positioning groove 313, the lower surface of the waterproof foam is attached to the upper surface of the first adhesive, the lower surface of the second adhesive is attached to the upper surface of the waterproof foam, and the upper surface of the second adhesive is attached to the inside of the sound hole 12, which can prevent the sound-generating component 30 from falling off the inside of the sound hole 12. The design of the front sound cavity 311 can ensure structural sealing and prevent problems such as acoustic short circuit or acoustic leakage. The rear acoustic chamber 312 contains a structure including a bulletproof twisted-pair cable, acetate cloth, a waterproof and breathable membrane, and a 2-pin-1.25mm speaker terminal male connector. A vent 314 is provided on one side of the rear acoustic chamber 312, and a first waterproof and breathable membrane 33 is adhered to the inner surface of the vent 314. The waterproof foam is made of materials including, but not limited to, EVA waterproof foam. The waterproof and breathable membrane and the vent 314 are located at the center of the bottom of the lower part of the sealed housing 31 (e.g., the second housing 317). The bulletproof... The outlet (i.e., cable hole 318) of the twisted pair cable (i.e., transmission cable 34) is located in the center of the side wall of the sealed housing 31 and is sealed with glue to ensure the airtightness of the sound-generating component 30. The first housing 316 has an annular positioning protrusion and the second housing 317 has an annular positioning groove. The positioning protrusion and the positioning groove are matched for limiting. The pressing and fixing of the two adopts ultrasonic pressing technology. The main function of this technology is to ensure the airtightness of the housing after sealing. Then, combined with the glue application method, the sealing is more reliable.

[0061] The sound emission method in this invention is designed as a frontal sound emission method, that is, the sound-emitting diaphragm 32 is directly opposite the sound-emitting hole 12. The sound-emitting component 30 and the inner sphere containing the camera 50 are located in two independent spaces, so that the sound is not diffused into the inner sphere housing of the camera 50 and lost, and at the same time, acoustic coupling with the acoustic path of the inner sphere is avoided.

[0062] The sound-emitting hole 12 is located on the left side of the product's outer casing. The sound-emitting hole 12 is a circular array formed by multiple holes with a diameter of 1mm. The sound output area meets the design requirement of 20%, that is, the ratio of the total area of ​​the sound-emitting hole 12 to the area of ​​the sound-emitting diaphragm 32 of the sound-emitting component 30 is 20%. This design effectively ensures that the final product's sound frequency range is within the range of human hearing, while improving the sound pressure level compared to the sound-emitting component 30 itself. The inner surface of the sound-emitting hole 12 has a ring rib 14 and a reinforcing rib 15. The size of the ring rib 14 can be designed to be consistent with the size of the waterproof foam. This design effectively ensures the sealing of the sound-emitting component 30, avoiding the problem of large harmonic distortion caused by sound leakage. At the same time, it can better fix the sound-emitting component 30 and reduce the vibration of the sound-emitting component 30 itself.

[0063] The microphone 41 is located directly in front of the inner hemisphere of the inner shell assembly 20. The microphone 41 is designed to be omnidirectional and is sealed to the inner shell of the inner sphere (i.e., inside the inner shell assembly 20) using UV adhesive. Inside the inner shell of the inner sphere is a hollowed-out cylinder (i.e., a perforated column 22), located where the microphone 41 is situated. The height of the perforated column 22 is required to be 3mm higher than the height of the microphone 41; this extra height is used for applying UV adhesive for sealing and fixation, ensuring the microphone 41 is airtight. The second waterproof and breathable membrane 42 at the microphone 41 is made of IP68 material with high breathability.

[0064] The sound acquisition component 40 includes a waterproof microphone 41, which is composed of a cable, a 2-pin-1.25 terminal, a PCB circuit board assembly, a cavity, a grid ring, a back electrode plate, a gasket, a diaphragm, and a shell. The second waterproof and breathable membrane 42 is made of EPTFE material.

[0065] The cable on microphone 41 is connected to the microphone 41 female connector on the motherboard via a 2-pin -1.25mm terminal; the sound-generating component 30 is located to the left of camera 50; the twisted-pair cable of the sound-generating component 30 passes through the gasket above the recess, and the 2-pin -1.25mm speaker terminal on the cable is connected to the motherboard speaker female connector inside the sphere; the sound acquisition component 40 and the sound-generating component 30 are set at a 90-degree angle, meeting the isolation and relative position requirements in the acoustic cavity design, which is beneficial for echo cancellation algorithm processing during full-duplex intercom, effectively reducing nonlinear distortion caused by solid-borne propagation. The transmitted sound becomes clearer and cleaner, with higher sound recognition, while also making the low frequencies fuller and the sound more magnetic, improving the overall audio effect of the device; at the same time, the waterproof design also increases the product's lifespan.

[0066] In summary, this invention provides a sound cavity structure and electronic device. By placing the sound-emitting component 30 within the mounting cavity 11 and spaced apart from the inner shell component 20, the sound-emitting component 30 and the sound-collecting component 40 are effectively separated by two cavities. This avoids coupling between the sound emitted by the sound-emitting component 30 and the sound collected by the sound-collecting component 40. The two-cavity layout also prevents the sound emitted by the sound-emitting component 30 from being captured by the sound-collecting component 40 through reflection and refraction within the cavity. Furthermore, the two-cavity layout avoids structural resonance, preventing abnormal sounds generated by structural resonance from being captured by the sound-collecting component 40, thus ensuring the quality of the collected sound. The system ensures the authenticity, clarity, and quality of the audio, preventing sound from being lost or diffused into the inner shell assembly 20 when it is emitted from the sound-emitting component 30, thus avoiding acoustic coupling with the inner shell assembly 20. By setting the orientation of the sound-emitting hole 12 to form an angle with the orientation of the sound-collecting hole 21, the system meets the requirements for the relative position and isolation of the sound-emitting position and the sound-collecting position in the acoustic structure. This facilitates further processing of the echo cancellation algorithm during full-duplex intercom, effectively reducing nonlinear distortion caused by solid-borne propagation. As a result, the sound emitted from the sound-emitting component 30 becomes clearer and cleaner, with higher sound recognition, while also making the low frequencies fuller and the sound more magnetic, thereby improving the overall audio effect of the electronic device. This invention features a simple and low-cost structure, facilitating assembly and subsequent maintenance. It addresses the common problems in existing small outdoor electronic devices, such as significant sound loss, coupling between emitted and collected sounds, and structural resonance. This invention provides a more optimized technical solution for the existing acoustic cavity structure design of small outdoor cameras, effectively improving audio output and input effects, reducing echo, and enhancing waterproof performance. It achieves a high-fidelity, echo-free, waterproof, and compact acoustic cavity design, making it suitable for large-scale promotion and use.

[0067] The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification.

[0068] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0069] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0070] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0071] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0072] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0073] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A acoustic cavity structure, characterized in that, include: The assembly comprises an outer shell assembly (10), an inner shell assembly (20), a sound-emitting assembly (30), and a sound-collecting assembly (40); the outer shell assembly (10) has an internal mounting cavity (11), and the outer shell assembly (10) also has a sound-emitting hole (12) communicating with the mounting cavity (11); the sound-emitting assembly (30) is sealed to the sound-emitting hole (12) and the connecting end of the mounting cavity (11); the outer shell assembly (10) also has a through window (13) communicating with the mounting cavity (11); at least a portion of the inner shell assembly (20) is disposed within the mounting cavity (11); the inner shell assembly (20) has a sound-collecting hole (21). The sound acquisition hole (21) is connected to the outside of the outer shell assembly (10) through the through window (13); the sound acquisition component (40) is disposed in the inner shell assembly (20) and is connected to the sound acquisition hole (21), and the sound acquisition component (40) and the sound acquisition hole (21) are sealed together; wherein, the sound generating component (30) and the sound acquisition component (40) are respectively sealed and waterproof; the sound generating component (30) is disposed in the mounting cavity (11) and is spaced apart from the inner shell assembly (20); the orientation of the sound generating hole (12) is at an angle to the orientation of the sound acquisition hole (21).

2. The acoustic cavity structure according to claim 1, characterized in that, The sound-generating component (30) includes a porous waterproof component, a sealing housing (31), and a sound-generating diaphragm (32) disposed inside the sealing housing (31). The sound-generating diaphragm (32) divides the interior of the sealing housing (31) into a front sound cavity (311) and a rear sound cavity (312). The front sound cavity (311) is disposed facing the sound-generating hole (12). The sound-generating diaphragm (32) is used to vibrate and generate sound. The porous waterproof component is disposed inside the front sound cavity (311) and fixed at the connecting end between the sound-generating hole (12) and the mounting cavity (11) to prevent water from entering the mounting cavity (11).

3. The acoustic cavity structure according to claim 2, characterized in that, The porous waterproof component is waterproof foam; the sound-generating assembly (30) further includes a first adhesive and a second adhesive; the sealing shell (31) has a positioning groove (313) on the outside of one end facing the sound-generating hole (12), one side of the first adhesive is pasted and fixed in the positioning groove (313), the other side of the first adhesive is pasted and fixed in one side of the waterproof foam, the other side of the waterproof foam is pasted in one side of the second adhesive, and the other side of the second adhesive is pasted and fixed in the connecting end of the sound-generating hole (12) and the mounting cavity (11); wherein, the sound emitted by the sound-generating diaphragm (32) passes through the first adhesive, the waterproof foam, the second adhesive, and the sound-generating hole (12) in sequence to the outside of the outer shell assembly (10); the thickness of the first adhesive and / or the second adhesive is not less than 0.5 mm; the thickness of the waterproof foam is not less than 0.3 mm.

4. The acoustic cavity structure according to claim 2, characterized in that, The sound-generating component (30) further includes a first waterproof and breathable membrane (33), and the sealing housing (31) also has a vent (314), which communicates with the outside of the sound-generating component (30) and the rear sound cavity (312) respectively; the first waterproof and breathable membrane (33) is disposed at the vent (314) to make the vent (314) waterproof; wherein, the vent (314) is located in the middle of one end face of the sealing housing (31); the end of the vent (314) facing the outside of the sealing housing (31) has a sealing groove (315), and the first waterproof and breathable membrane (33) is fixedly disposed in the sealing groove (315); And / or, the sealing housing (31) includes a first housing (316) and a second housing (317), the first housing (316) having a positioning protrusion and the second housing (317) having a positioning groove, the positioning protrusion being in a limiting fit with the positioning groove; or, the first housing (316) having a positioning groove and the second housing (317) having a positioning protrusion, the positioning protrusion being in a limiting fit with the positioning groove; wherein, the gap between the positioning protrusion and the positioning groove is sealed by dispensing adhesive to seal and fix the first housing (316) and the second housing (317).

5. The acoustic cavity structure according to claim 2, characterized in that, The sound-generating component (30) further includes a circuit board disposed inside the sealed housing (31) and a transmission cable (34) connected to the circuit board, the transmission cable (34) being used for connection to the outside; the sealed housing (31) has a cable hole (318) communicating with the interior of the sealed housing (31), a portion of the transmission cable (34) extending out of the sealed housing (31) through the cable hole (318); wherein, the transmission cable (34) is a bulletproof twisted pair cable; the cable hole (318) is located on the side wall of the sealed housing (31), and the cable hole (318) is sealed with glue to seal the sealed housing (31).

6. The acoustic cavity structure according to claim 2, characterized in that, The orientation of the sound-emitting hole (12) is perpendicular to the orientation of the sound-collecting hole (21); the sound-emitting hole (12) includes a plurality of circular holes, which are spaced apart to form an array; the diameter of the circular holes is greater than or equal to 0.5 mm and less than or equal to 1.5 mm; the total cross-sectional area of ​​the plurality of circular holes is greater than or equal to 20% of the cross-sectional area of ​​the sound-emitting diaphragm (32); And / or, the interior of the housing assembly (10) has an annular rib (14) and a plurality of reinforcing ribs (15), the annular rib (14) being disposed on the inner wall of the mounting cavity (11) and surrounding the circumference of the sound-emitting hole (12); at least a portion of the porous waterproof component is disposed inside the annular rib (14); the reinforcing ribs (15) are fixedly disposed on the inner wall of the mounting cavity (11), the plurality of reinforcing ribs (15) being spaced apart circumferentially along the annular rib (14), and the reinforcing ribs (15) extending radially along the annular rib (14); And / or, the mounting cavity (11) includes a constraint cavity (16), at least a portion of the sealing housing (31) is disposed within the constraint cavity (16) and is limitedly fitted with the inner wall of the constraint cavity (16); when the sound-generating diaphragm (32) vibrates to generate sound, the inner wall of the constraint cavity (16) suppresses the overall vibration of the sound-generating assembly (30).

7. The acoustic cavity structure according to claim 1, characterized in that, The inner shell assembly (20) has a hollow column (22) inside, and the hollow column (22) has a hollow cavity (221) inside, which is connected to the sound acquisition hole (21); the sound acquisition assembly (40) includes a silicone sleeve and a microphone (41), the silicone sleeve covers the outside of the microphone (41), the silicone sleeve is disposed in the hollow cavity (221), and the microphone (41) is disposed facing the sound acquisition hole (21); the silicone sleeve is sealed and fixed to the inner wall of the hollow cavity (221) with glue.

8. The acoustic cavity structure according to claim 7, characterized in that, The sound acquisition component (40) further includes a second waterproof and breathable membrane (42), a sealing foam (43), a third adhesive (44), a fourth adhesive (45), and a fifth adhesive (46); one side of the third adhesive (44) is adhered to the outer surface of the silicone sleeve, the other side of the third adhesive (44) is adhered to one side of the sealing foam (43), the other side of the sealing foam (43) is adhered to one side of the fourth adhesive (45), the other side of the fourth adhesive (45) is adhered to one side of the waterproof and breathable membrane, the other side of the waterproof and breathable membrane is adhered to one side of the fifth adhesive (46), and the other side of the fifth adhesive (46) is adhered to the hollowed-out... The cavity (221) and the sound acquisition hole (21) are connected at the connection point; wherein, external sound passes sequentially through the fifth adhesive (46), the second waterproof and breathable membrane (42), the fourth adhesive (45), the sealing foam (43), and the third adhesive (44) to the microphone (41); the thickness of at least one of the third adhesive (44), the fourth adhesive (45), and the fifth adhesive (46) is not less than 0.05 mm; the microphone (41) is connected to the outside through the sound pickup channel (23), the sound pickup channel (23) includes a part of the hollow cavity (221) and the sound acquisition hole (21), and the axial length of the sound pickup channel (23) is less than 5 mm.

9. An electronic device, characterized in that, The electronic device includes the acoustic cavity structure according to any one of claims 1 to 8; the electronic device further includes a driving component, the inner shell component (20) is rotatably disposed in the mounting cavity (11), the driving component is drivingly connected to the inner shell component (20) and is used to drive the inner shell component (20) to rotate.

10. The electronic device according to claim 9, characterized in that, The electronic device also includes a camera (50), at least a portion of which is disposed within the inner shell assembly (20), and the camera (50) receives light through the through window (13); at least a portion of the outer side of the inner shell assembly (20) is arc-shaped. The sound acquisition hole (21) is oriented in the same direction as the camera (50).

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