A high-efficiency waterproof inverted-phase sound box

Abstract

The utility model discloses a high -efficient waterproof inverter phase sound box, including rear shell, it includes rear cavity, the outer interface of intercommunication rear cavity, be equipped with the loudspeaker tray in the rear shell, and be equipped with the first loudspeaker on the loudspeaker tray, front shell, waterproof structure, it includes the protective mesh cover, is equipped with waterproof spare on the inner side of protective mesh cover, and is surrounded the installation groove of setting on the upper opening periphery, the protective mesh cover covers on the upper opening, and the week side is inserted in the installation groove, waterproof spare includes waterproof cotton. The utility model provides a high -efficient waterproof inverter phase sound box, through setting up waterproof structure, including protective mesh cover and waterproof cotton, effectively prevent moisture from entering the sound box inside from above, and simultaneously the air permeability of waterproof cotton allows the sound to pass through, keeps the sound quality from being influenced, improves the waterproof performance and reliability of sound box, realizes the unity of waterproof performance and excellent sound quality.

Description

Technical Field

[0001] This utility model relates to the field of audio equipment technology, and in particular to a highly efficient waterproof bass-reflex speaker. Background Technology

[0002] Bass-reflex speakers are widely used because they utilize the bass reflex port (hole) to resonate with the air inside the cabinet, effectively extending the low-frequency response and improving efficiency. However, the bass reflex port (46) structure of traditional bass-reflex speakers is a weak point in their waterproof performance. In outdoor or high-humidity environments (such as rain, snow, spray, humid air), liquid water (rainwater, splash water) and water vapor can easily penetrate into the cabinet through the bass reflex port (46). Existing solutions to the waterproofing problem of bass-reflex speakers mainly have the following drawbacks:

[0003] Option 1: Completely sealed enclosure (similar to a sealed enclosure design): Although it is waterproof, it completely sacrifices the core advantage of bass-reflex speakers: improved low-frequency response and efficiency, resulting in insufficient low-frequency quantity, decreased sensitivity, and severe sound quality degradation.

[0004] Option 2: Install a simple shield (such as a plastic baffle or grille) at the phase reversing port (46):

[0005] 1) Poor waterproofing: It cannot effectively block water mist and water vapor from penetrating, and it is easy for water to accumulate or for water to be carried into the interior by airflow.

[0006] 2) Affects sound quality: Obstructions will hinder the free flow of air in the bass reflex port (46), disrupt the Helmholtz resonance effect, and significantly degrade low-frequency performance (such as generating wind noise, reducing low-frequency output, and changing frequency response). Similarly, waterproofing and sound quality cannot be achieved at the same time.

[0007] 3) Durability issues: Simple mechanical shields may be easily damaged or not properly sealed.

[0008] Therefore, there is an urgent need for an innovative bass-reflex speaker design that can effectively improve waterproof performance without sacrificing its inherent low-frequency response and sound quality. Utility Model Content

[0009] To address the aforementioned issues, this technical solution provides a highly efficient, waterproof bass-reflex speaker.

[0010] To achieve the above objectives, the technical solution is as follows:

[0011] A highly efficient waterproof bass-reflex speaker, including

[0012] The rear housing includes a rear cavity and an external interface communicating with the rear cavity; the rear housing is provided with a speaker tray and a first speaker disposed on the speaker tray;

[0013] The front housing includes a housing portion, an outer edge disposed on the outer periphery of the housing portion for docking with the outer interface, an upper opening and a lower opening disposed on the housing portion, a front cavity located between the upper opening and the lower opening, and a bass reflex port connecting the front cavity and the rear cavity; a second speaker is disposed in the front cavity.

[0014] A waterproof structure includes a protective mesh cover, a waterproof component disposed on the inner side of the protective mesh cover, and a mounting groove disposed around the outer periphery of the upper opening; the protective mesh cover covers the upper opening and is inserted into the mounting groove on its periphery; the waterproof component includes waterproof cotton.

[0015] As described above, in a highly efficient waterproof bass-reflex speaker, a support edge is formed between the upper opening and the mounting groove, and the height of the support edge gradually increases from two adjacent corners toward the area between those two corners, so that the protective mesh bulges from the periphery toward the center.

[0016] As described above, in a highly efficient waterproof bass-reflex speaker, the front housing further includes a bracket disposed on the housing portion. The bracket is used to support the second speaker in the middle of the front cavity, so as to be coaxial with the first speaker and arranged at a front-to-back interval.

[0017] As described above, in a highly efficient waterproof bass-reflex speaker, a horn is provided on the front end face of the bracket, and the second speaker is provided on the rear end face of the bracket.

[0018] In a highly efficient waterproof bass-reflex speaker as described above, the first speaker is connected to the lower opening to seal the lower opening.

[0019] As described above, a high-efficiency waterproof bass-reflex speaker has bass-reflex posts at two corners of the housing, each bass-reflex post being hollow to form a bass-reflex port, and the bass-reflex posts extending toward the rear cavity.

[0020] As described above, in a highly efficient waterproof bass-reflex speaker, the first speaker is a mid-bass speaker and the second speaker is a tweeter.

[0021] As described above, a highly efficient waterproof bass-reflex speaker includes a expanded polytetrafluoroethylene (ePTFE) polymer waterproof and breathable membrane or a polyurethane breathable membrane as the waterproof component.

[0022] As described above, in a highly efficient waterproof bass-reflex speaker, an adhesive layer is provided between the waterproof cotton and the protective mesh cover for bonding the two together.

[0023] As described above, in a highly efficient waterproof bass-reflex speaker, the density of the waterproof cotton is 20 kg / m³. 3 It has a hardness of 55 degrees and a tensile strength of 0.9 kg / cm². 2It has a thickness of 4mm and an air permeability of 800L / m². 2 / s, with a hydrostatic head of over 5 kPa.

[0024] The beneficial effects of this application are:

[0025] This invention provides a highly efficient waterproof bass-reflex speaker. By setting up a waterproof structure, including a protective mesh cover and waterproof cotton, it effectively prevents water from entering the speaker from above. At the same time, the breathability of the waterproof cotton allows sound to pass through, keeping the sound quality unaffected, improving the speaker's waterproof performance and reliability, and achieving a balance between waterproof performance and excellent sound quality. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0027] Figure 1 This is an exploded view of the structure of this utility model;

[0028] Figure 2 This is a half-sectional view of the present invention. Detailed Implementation

[0029] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] A highly efficient waterproof bass-reflex speaker, including

[0031] The rear shell 1 includes a rear cavity 11 and an external interface 12 communicating with the rear cavity 11; the rear shell 1 is provided with a speaker tray 2 and a first speaker 3 disposed on the speaker tray 2;

[0032] The front shell 4 includes a shell portion 41, an outer edge 42 disposed on the outer periphery of the shell portion 41 for mating with the outer interface 12, an upper opening 43 and a lower opening 44 disposed on the shell portion 41, a front cavity 45 located between the upper opening 43 and the lower opening 44, and a bass reflex port 46 connecting the front cavity 45 and the rear cavity 11; a second speaker 5 is disposed in the front cavity 45.

[0033] The waterproof structure 6 includes a protective mesh cover 61, a waterproof component 62 disposed on the inner side of the protective mesh cover 61, and a mounting groove 63 surrounding the outer periphery of the upper opening 43. The protective mesh cover 61 covers the upper opening 43 and is inserted into the mounting groove 63. The waterproof component 62 includes waterproof cotton. The mounting groove ensures airtightness and a secure connection, guaranteeing no liquid penetration path. The protective mesh cover, made of weather-resistant aluminum, covers the front of the first and second speakers and is fixed to the front of the front shell by means of screws or other means, protecting the diaphragms of the first and second speakers.

[0034] This invention provides a highly efficient waterproof bass-reflex speaker. By setting up a waterproof structure, including a protective mesh cover and waterproof cotton, it effectively prevents water from entering the speaker from above. At the same time, the breathability of the waterproof cotton allows sound to pass through, keeping the sound quality unaffected, improving the speaker's waterproof performance and reliability, and achieving a balance between waterproof performance and excellent sound quality.

[0035] Furthermore, as a preferred embodiment of this solution and not a limitation, a support edge 64 is formed between the upper opening 43 and the mounting groove 63. The height of the support edge 64 gradually increases from adjacent corners towards the area between those corners, causing the protective mesh cover 61 to bulge from the periphery towards the center. This change in the height of the support edge causes the protective mesh cover to bulge from the periphery towards the center, which helps guide water flow to the surrounding areas, preventing water accumulation. Simultaneously, it increases the strength of the mesh cover, reduces deformation, and further optimizes the waterproof effect and sound diffusion.

[0036] Furthermore, as a preferred embodiment of this solution and not a limitation, the front shell 4 also includes a bracket 47 disposed on the shell portion 41. The bracket 47 is used to support the second speaker 5 in the middle of the front cavity 45, so as to be coaxial with the first speaker 3 and arranged at a front-to-back interval. By supporting the second speaker in the middle of the front cavity with the bracket and coaxially arranged with the first speaker, the sound propagation is more coordinated, the phase difference is reduced, and the sound quality and sound consistency are improved.

[0037] Furthermore, as a preferred embodiment of this solution and not a limitation, a horn 7 is provided on the front end face of the bracket 47, and the second speaker 5 is provided on the rear end face of the bracket 47. Providing a horn on the bracket enhances the high-frequency propagation efficiency and directivity of the second speaker, making the sound more focused and clear, and improving high-frequency performance.

[0038] Furthermore, as a preferred embodiment of this solution and not a limitation, the first speaker 3 is connected to the lower opening 44 to seal the lower opening 44. This is beneficial for enhancing the bass effect.

[0039] Furthermore, as a preferred embodiment of this solution and not a limitation, bass reflex posts 48 are respectively provided at both corners of the housing portion 41. The bass reflex posts 48 are hollow to form the bass reflex ports 46, and extend towards the rear cavity 11. The bass reflex posts at the two corners of the housing portion form bass reflex ports, optimizing the airflow channel between the rear and front cavities, enhancing bass response and sound balance, and improving the acoustic performance of the speaker. The bass reflex posts are located on the front of the front housing, allowing direct communication between the rear and front cavities. Their shape (circular) and dimensions (length, cross-sectional area) are acoustically optimized based on the target low-frequency response.

[0040] Furthermore, as a preferred embodiment of this solution and not a limitation, the first speaker 3 is a mid-bass speaker, and the second speaker 5 is a tweeter. The first speaker acting as a mid-bass speaker and the second speaker acting as a tweeter achieve full-frequency sound coverage, providing rich sound effects and a wider frequency response.

[0041] Furthermore, as a preferred embodiment of this solution and not a limitation, the waterproof component 62 includes an expanded polytetrafluoroethylene (ePTFE) polymer waterproof and breathable membrane or a polyurethane breathable membrane. Using an ePTFE polymer waterproof and breathable membrane or a polyurethane breathable membrane as the waterproof component provides excellent waterproof and breathable performance, ensuring sound transmission while preventing moisture penetration and extending the speaker's lifespan.

[0042] Furthermore, as a preferred embodiment of this solution and not a limitation, an adhesive layer is provided between the waterproof cotton and the protective mesh cover 61 for bonding the two together. The adhesive layer bonds the waterproof cotton to the protective mesh cover, ensuring the waterproof component is firmly fixed, preventing detachment, and improving durability and the stability of the waterproof structure.

[0043] Furthermore, as a preferred embodiment of this solution and not a limitation, the density of the waterproof cotton is 20 kg / m³. 3 It has a hardness of 55 degrees and a tensile strength of 0.9 kg / cm². 2 It has a thickness of 4mm, an air permeability of 800L / m² / s, and a hydrostatic head of over 5kPa. The specific parameters of the waterproof cotton ensure sufficient breathability and waterproofness, maintaining sound quality while withstanding a certain water pressure and providing reliable waterproof protection. Its hardness is 55 on the Shore A scale.

[0044] Furthermore, as a preferred embodiment of this solution and not a limitation, the rear shell is a one-piece structure injection molded from engineering plastic (PP+barium). This material possesses excellent robustness, weather resistance, corrosion resistance, and water resistance (as a basic protective layer), providing a core protective shell for the internal components. The rear shell shape is designed to meet acoustic requirements.

[0045] The working process and principle of this embodiment:

[0046] 1. Acoustic Operation: When the speaker units (i.e., the first and second speakers) vibrate to produce sound, they push the air inside the front cavity. The bass reflex port and the air inside it form a Helmholtz resonator. In the target low-frequency range, the air column inside the bass reflex port vibrates in phase with the back wave of the speaker and radiates sound waves, effectively enhancing low-frequency output, reducing distortion, and improving efficiency.

[0047] 2. Function of waterproof components:

[0048] Waterproofing: The waterproof cotton covering the inverted pores effectively blocks the intrusion of external liquid water (rainwater, splash water) due to its high hydrostatic pressure properties. Its hydrophobic microporous structure also greatly hinders the permeation rate of water vapor.

[0049] Breathability: The microporous structure of the waterproof cotton has extremely high breathability. This allows air in the front and rear chambers to freely and with low resistance exchange with the outside air through the bass reflex port and the waterproof cotton. This breathability is crucial for maintaining the acoustic function of the bass reflex port, ensuring the normal operation of the Helmholtz resonance effect, and fully preserving the speaker's low-frequency response, efficiency, and sound quality, resulting in excellent speech and music reproduction.

[0050] 3. Technical Effects

[0051] 1) Superior Water and Moisture Resistance: Through the crucial application of waterproof cotton in the bass reflex port, combined with the sealed design of the mounting slot, the entire speaker enclosure achieves an IP65 protection rating. It effectively prevents water spray from any direction (such as simulated rain or washing water jets) from entering and can operate stably for extended periods in high humidity (95% RH) environments. Operating temperature range: -25℃ to +55℃; Storage temperature range: -40℃ to +70℃.

[0052] 2) Excellent sound quality retention: The high breathability of the waterproof cotton ensures that the low-frequency enhancement effect of the bass-reflex speaker is not compromised. The measured sound pressure level can reach 98±3dB (1m, 1W), and the frequency response range covers 80Hz-20kHz (±3dB), with full and powerful low frequencies and clear and bright mid and high frequencies.

[0053] 3) High durability and weather resistance: The PP+barium engineering plastic of the cabinet (i.e., the front and rear shells) and the aluminum material of the mesh cover (1) give the speaker excellent impact resistance, UV resistance, high and low temperature resistance and corrosion resistance, making it suitable for various complex indoor and outdoor environments.

[0054] 4) Flexible adaptability: Multiple voltage / impedance options to meet the access requirements of constant voltage broadcasting systems and professional constant impedance power amplifier systems.

[0055] 5) Easy installation: Standardized mounting hole design, compatible with various brackets, easy and secure installation.

[0056] The above description is only a preferred embodiment of this application and is not intended to limit the scope of implementation of this application. Any other embodiments whose principles and basic structures are the same as or similar to those of this application are within the protection scope of this application.

Claims

1. A highly efficient waterproof bass-reflex speaker, characterized in that: include The rear shell (1) includes a rear cavity (11) and an external interface (12) communicating with the rear cavity (11); the rear shell (1) is provided with a speaker tray (2) and a first speaker (3) disposed on the speaker tray (2); The front shell (4) includes a shell portion (41), an outer edge (42) disposed on the outer periphery of the shell portion (41) and used for docking with the outer interface (12), an upper opening (43) and a lower opening (44) disposed on the shell portion (41), a front cavity (45) located between the upper opening (43) and the lower opening (44), and a bass reflex port (46) connecting the front cavity (45) and the rear cavity (11); a second speaker (5) is provided in the front cavity (45); A waterproof structure (6) includes a protective mesh cover (61), a waterproof component (62) disposed on the inner side of the protective mesh cover (61), and a mounting groove (63) surrounding the outer periphery of the upper opening (43); the protective mesh cover (61) covers the upper opening (43) and is inserted into the mounting groove (63) on its periphery; the waterproof component (62) includes waterproof cotton.

2. The high-efficiency waterproof bass-reflex speaker according to claim 1, characterized in that: A support edge (64) is formed between the upper opening (43) and the mounting groove (63). The height of the support edge (64) gradually increases from the two adjacent corners to the area between the two corners, so that the protective net cover (61) bulges from the periphery to the center.

3. The high-efficiency waterproof bass-reflex speaker according to claim 1, characterized in that: The front shell (4) also includes a bracket (47) disposed on the housing portion (41). The bracket (47) is used to support the second speaker (5) in the middle of the front cavity (45) so as to be coaxial with the first speaker (3) and arranged at a front-to-back interval.

4. The high-efficiency waterproof bass-reflex speaker according to claim 3, characterized in that: A horn (7) is provided on the front end face of the bracket (47), and the second speaker (5) is provided on the rear end face of the bracket (47).

5. A high-efficiency waterproof bass-reflex speaker according to claim 1, characterized in that: The first loudspeaker (3) docks with the lower opening (44) to block the lower opening (44).

6. The high-efficiency waterproof bass-reflex speaker according to claim 1, characterized in that: The housing portion (41) is provided with phase inversion posts (48) at its two corners. The phase inversion posts (48) are hollow to form the phase inversion holes (46). The phase inversion posts (48) extend toward the rear cavity (11).

7. A high-efficiency waterproof bass-reflex speaker according to claim 1, characterized in that: The first speaker (3) is a mid-bass speaker, and the second speaker (5) is a tweeter.

8. A high-efficiency waterproof bass-reflex speaker according to claim 1, characterized in that: The waterproof component (62) includes expanded polytetrafluoroethylene polymer waterproof and breathable membrane or polyurethane breathable membrane.

9. A high-efficiency waterproof bass-reflex speaker according to claim 1, characterized in that: An adhesive layer is provided between the waterproof cotton and the protective mesh cover (61) for bonding the two together.

10. A high-efficiency waterproof bass-reflex speaker according to claim 1, characterized in that: The density of the waterproof cotton is 20 kg / m³. 3 It has a hardness of 55 degrees and a tensile strength of 0.9 kg / cm². 2 It has a thickness of 4mm and an air permeability of 800L / m². 2 / s, with a hydrostatic head of over 5 kPa.

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