A high pitch loudspeaker integrated with a closed back cavity

Abstract

The application provides a high-pitched loudspeaker integrated with a sealed rear cavity, and relates to the technical field of loudspeakers. By matching a first supporting assembly, a second supporting assembly and a sealing structure, an integrated acoustic chamber is enclosed on the back side of a diaphragm, and a ventilation channel and a tuning assembly are arranged, so that the loudspeaker can be applied to ultra-thin electronic devices such as smart phones, tablet computers and smart watches. Meanwhile, the integrated design avoids the complicated procedures of separately opening molds, manufacturing and assembling the high-pitched monomer and the sound box shell, significantly reduces the number of parts, material cost and mold investment, and improves the production efficiency. In addition, since the sealing performance of the integrated acoustic chamber is easy to accurately control, air leakage or abnormal internal sound wave reflection is effectively avoided, so that the acoustic performance of the product and the consistency of batch production are ensured. Therefore, the application has the beneficial effects of simple and compact structure, low cost and improved acoustic performance.

Description

Technical Field

[0001] This application relates to the field of loudspeaker technology, specifically, it provides a tweeter with an integrated sealed rear cavity. Background Technology

[0002] Traditional tweeters typically employ a discrete structure consisting of a magnetic circuit system, a vibration system, and an external, separate enclosure. In this structure, the tweeter, from bottom to top, comprises a yoke, magnet, washer, driver support, voice coil, and diaphragm. This tweeter requires a separately manufactured enclosure to function properly, and the enclosure usually includes a top cover, a bottom cover, and tuning components such as Mylar sheets or breathable mesh attached to vents. This discrete design significantly increases the overall thickness of the speaker, limiting its application in ultra-thin electronic devices such as smartphones, tablets, and smartwatches.

[0003] Furthermore, the discrete structure of traditional tweeters leads to structural complexity and high costs. Because the tweeter and enclosure need to be molded, manufactured, and assembled separately, the number of parts is large and the assembly process is cumbersome, increasing material costs and mold investment while reducing production efficiency. At the same time, the assembly gap and sealing performance between the tweeter and enclosure are difficult to control precisely, easily leading to air leakage or abnormal internal sound wave reflections, severely affecting the product's acoustic performance, such as distortion and frequency response fluctuations, making it difficult to guarantee the consistency of mass-produced products.

[0004] To address the aforementioned issues, existing equipment urgently needs improvement. Summary of the Invention

[0005] The purpose of this application is to provide a tweeter with an integrated sealed rear cavity, which aims to solve the problems of increased thickness, complex structure, high cost and poor acoustic performance consistency caused by the discrete structure of traditional tweeters.

[0006] In a first aspect, a tweeter with an integrated sealed rear cavity includes at least: The first support assembly is a magnetic yoke, which is used to support the magnet and the washer, and cooperates with the magnet and the washer to form a magnetic circuit system. The second support assembly is used to support the vibration system, which consists of a voice coil and a diaphragm. A sealing structure is disposed between the first support assembly and the second support assembly, so that the first support assembly and the second support assembly are airtightly connected to form an integrated acoustic chamber on the back side of the diaphragm; A ventilation channel, located on the second support assembly, is used to connect the integrated acoustic chamber with the external environment; A tuning component, positioned along the path of the ventilation channel, is used to generate acoustic impedance for airflow exchange within the integrated acoustic chamber.

[0007] Furthermore, the second support component is a bracket, and the integrated acoustic chamber is formed by the magnetic circuit system and the bracket together.

[0008] Furthermore, the magnetic yoke has a cup-shaped structure, the support has an annular disc-shaped structure, and the magnetic yoke and the support are sealed together through an annular joint surface.

[0009] Furthermore, the sealing structure is a sealant or an elastic sealing ring disposed at the annular joint surface.

[0010] Furthermore, the ventilation channel is a vent hole, and the tuning component is a tuning diaphragm attached to the side of the vent hole facing the outside.

[0011] Furthermore, the diameter of the vent hole is 0.25 mm.

[0012] Furthermore, the vent hole is a single hole or an array of holes composed of multiple micropores.

[0013] Furthermore, the diameter of the tuning component is 3mm.

[0014] Furthermore, the tuning diaphragm is a Mylar polyester film, non-woven fabric, or microporous metal sheet.

[0015] Furthermore, the tweeter is composed of the tuning assembly, the first support assembly, the magnet, the washer, the second support assembly, the voice coil, and the diaphragm from top to bottom, and the thickness between the top and bottom does not exceed 5mm.

[0016] Beneficial Effects: The integrated sealed rear cavity tweeter provided in this application, by cooperating a first support component, a second support component, and a sealing structure to form an integrated acoustic chamber on the back side of the diaphragm, and by setting up a ventilation channel and a tuning component, effectively solves the problem of significantly increased overall speaker thickness caused by the discrete structure of traditional tweeters, making it suitable for ultra-thin electronic devices such as smartphones, tablets, and smartwatches. Simultaneously, this integrated design avoids the cumbersome processes of separately molding, manufacturing, and assembling the tweeter and speaker housing, significantly reducing the number of parts, material costs, and mold investment, and improving production efficiency. Furthermore, because the sealing performance of the integrated acoustic chamber is easy to precisely control, it effectively avoids air leakage or abnormal internal sound wave reflection, thereby ensuring the acoustic performance of the product and the consistency of mass production. Therefore, this application has the beneficial effects of simple and compact structure, low cost, and improved acoustic performance. Attached Figure Description

[0017] Figure 1 An exploded view of a tweeter with an integrated sealed rear cavity provided in this application.

[0018] Figure 2 This is an exploded view of a tweeter in the prior art.

[0019] Figure 3 A three-dimensional structural diagram of a tweeter with an integrated sealed rear cavity provided in this application.

[0020] In the diagram: 1. Tuning component; 2. First support component; 3. Magnet; 4. Washer; 5. Second support component; 6. Voice coil; 7. Diaphragm; 8. Top cover; 9. Bottom cover; 10. Vent channel. Detailed Implementation

[0021] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Please refer to Figure 2 Traditional tweeters typically employ a discrete structure consisting of a magnetic circuit system, a vibration system, and an external, separate enclosure. In this structure, the tweeter, from bottom to top, comprises a yoke, magnet (3), washer (4), driver support, voice coil (6), and diaphragm (7). This tweeter requires a separately manufactured enclosure to function properly, and the enclosure usually includes a top cover (8), a bottom cover (9), and tuning components such as Mylar sheets or breathable mesh attached to vents. This discrete design significantly increases the overall thickness of the speaker, limiting its application in ultra-thin electronic devices such as smartphones, tablets, and smartwatches.

[0024] Furthermore, the discrete structure of traditional tweeters leads to structural complexity and high costs. Because the tweeter and enclosure need to be molded, manufactured, and assembled separately, the number of parts is large and the assembly process is cumbersome, increasing material costs and mold investment while reducing production efficiency. At the same time, the assembly gap and sealing performance between the tweeter and enclosure are difficult to control precisely, easily leading to air leakage or abnormal internal sound wave reflections, severely affecting the product's acoustic performance, such as distortion and frequency response fluctuations, making it difficult to guarantee the consistency of mass-produced products.

[0025] For this, please refer to Figure 1 , Figure 3 The tweeter with an integrated sealed rear cavity disclosed in this application includes at least: The first support assembly 2 is a magnetic yoke, which is used to support the magnet 3 and the washer 4, and cooperates with the magnet 3 and the washer 4 to form a magnetic circuit system. The second support assembly 5 is used to support the vibration system, which consists of a voice coil 6 and a diaphragm 7. A sealing structure is provided between the first support assembly 2 and the second support assembly 5 to achieve an airtight connection between the first support assembly 2 and the second support assembly 5, so as to form an integrated acoustic chamber on the back side of the diaphragm 7. Ventilation channel 10, located on the second support assembly 5, is used to connect the integrated acoustic chamber with the external environment; The tuning component 1 is located on the path of the ventilation channel 10 and is used to generate acoustic impedance for airflow exchange within the integrated acoustic chamber.

[0026] This application effectively solves the problems of traditional tweeters, such as large thickness, complex structure, high cost, and unstable acoustic performance, by integrating the speaker enclosure of a traditional tweeter into the speaker body to form an integrated sealed rear cavity.

[0027] The core of this application's integrated sealed rear cavity tweeter lies in the integrated design of the traditional tweeter's independent enclosure structure. This significantly reduces the overall size of the tweeter while maintaining acoustic performance, and simplifies its manufacturing and assembly process. The first support component 2 acts as a magnetic yoke, primarily supporting the magnet 3 and washer 4, forming a magnetic circuit system that provides a stable magnetic field for the voice coil 6. The second support component 5 supports the vibration system, which consists of the voice coil 6 and diaphragm 7, responsible for converting electrical signals into sound waves. The sealing structure ensures an airtight connection between the first and second support components 2 and 5, forming a sealed integrated acoustic chamber on the back side of the diaphragm 7. A ventilation channel 10 is formed on the second support component 5, connecting the integrated acoustic chamber to the external environment for airflow exchange. A tuning component 1 is positioned along the path of the ventilation channel 10, generating acoustic impedance to the airflow exchange within the chamber, thereby tuning the tweeter's acoustic characteristics.

[0028] Specifically, the first support component 2 can be made of various materials and structural forms. For example, it can be made of ferromagnetic material by stamping, casting, or machining to ensure that it has sufficient magnetic permeability and mechanical strength to support the magnet 3 and the washer 4. In one embodiment, the first support component 2 can be a cup-shaped magnetic yoke.

[0029] The second support assembly 5 can also be made of various materials and structures. For example, it can be made of plastic by injection molding, or of metal by die casting or stamping. The main function of the second support assembly 5 is to provide a stable mounting base for the voice coil 6 and the diaphragm 7, and to ensure that the vibration system can move precisely during operation. For example, the second support assembly 5 can be designed as a ring-shaped disk structure, with the central area used to mount the voice coil 6 and the diaphragm 7, and the outer area connected to the first support assembly 2.

[0030] The sealing structure can employ various sealing materials and methods. For example, liquid sealant can be used to form a continuous sealing layer on the mating surfaces of the first support assembly 2 and the second support assembly 5. Alternatively, a prefabricated elastic sealing ring can be placed in a groove between the mating surfaces, achieving an airtight connection through compression deformation.

[0031] The arrangement of the ventilation channel 10 is crucial to the acoustic performance of the integrated acoustic chamber. The ventilation channel 10 can be one or more holes, the shape, size, and position of which can be adjusted according to acoustic design requirements. For example, the ventilation channel 10 can be a circular vent or an array of multiple micropores. These holes can be directly formed in the wall of the second support assembly 5 or implemented through a pre-reserved structure.

[0032] The function of the tuning component 1 is to precisely control the airflow exchange between the integrated acoustic chamber and the external environment, thereby tuning the acoustic parameters of the speaker, such as the low-frequency response and Q value. The tuning component 1 can take various forms. For example, it can be a tuning diaphragm attached to the outside of the ventilation channel 10.

[0033] The tweeter with an integrated sealed rear cavity proposed in this application operates by achieving high performance and miniaturization through structural integration and acoustic tuning. When an electrical signal is input to the voice coil 6, the voice coil 6 vibrates under the force of the magnetic field generated by the magnetic circuit system, thereby driving the diaphragm 7 to vibrate and generate sound waves. During the vibration of the diaphragm 7, the air in the integrated acoustic cavity on its back side is compressed and expanded. Without the ventilation channel 10 and the tuning component 1, the air in the cavity would form a rigid air cushion, severely restricting the movement of the diaphragm 7, resulting in poor low-frequency response and high distortion. By opening the ventilation channel 10 on the second support component 5 and setting the tuning component 1, the air in the cavity can exchange with the external environment in a controlled manner. The tuning component 1 generates acoustic impedance for the airflow exchange, which is equivalent to an acoustic damper, effectively controlling the low-frequency resonant frequency and Q value of the diaphragm 7, thereby optimizing the low-frequency response and transient characteristics of the loudspeaker. The sealed structure ensures the airtightness of the integrated acoustic chamber, preventing acoustic performance degradation caused by air leakage and guaranteeing product consistency.

[0034] The core innovation of this application lies in integrating the discrete enclosure structure of a traditional tweeter with the speaker body, forming a compact, integrated, sealed rear cavity. Compared to the traditional tweeter design that requires a separate enclosure, this application directly encloses an integrated acoustic chamber on the back side of the diaphragm 7 by airtightly connecting the first support component 2 and the second support component 5, thereby significantly reducing the thickness of the speaker. This integrated design not only makes the speaker thinner and more suitable for ultra-thin electronic devices, but also simplifies the structure, reduces the number of parts, and lowers manufacturing costs and assembly processes. Furthermore, due to the integration of the chamber, the sealing performance is easier to control, avoiding air leakage problems caused by assembly gaps and poor sealing in traditional discrete structures, thereby improving the consistency and reliability of the product's acoustic performance. The setting of the ventilation channel 10 and the tuning component 1 further ensures that the integrated speaker can still achieve excellent acoustic tuning effects while being miniaturized.

[0035] Furthermore, the second support component 5 is a bracket, and the integrated acoustic chamber is formed by the magnetic circuit system and the bracket together.

[0036] Specifically, the second support assembly 5, as one of the main structural components of the tweeter, functions to support the vibration system. In a preferred embodiment, the second support assembly 5 can be specifically implemented as a bracket. This bracket is typically made of a material with a certain degree of rigidity, such as plastic, metal, or composite material, and its structural design aims to provide a stable mounting foundation for the vibration system composed of the voice coil 6 and the diaphragm 7.

[0037] The formation method of the integrated acoustic chamber is further clarified. This chamber is not formed by a single, independent component, but rather through the coordinated operation of a magnetic circuit system and the aforementioned support structure. The magnetic circuit system typically includes a magnet 3 and a washer 4, which, together with the first support component 2 (magnetic yoke), constitute the integrated acoustic chamber. When the support structure and magnetic circuit system are assembled, a sealed space—the integrated acoustic chamber—is formed on the back side of the diaphragm 7 through the sealing structure. This enclosure method ensures the integrity and airtightness of the chamber, providing a stable acoustic environment for the tweeter.

[0038] Furthermore, the magnetic yoke has a cup-shaped structure, and the support has an annular disc-shaped structure. The magnetic yoke and the support are sealed together through an annular joint surface.

[0039] Specifically, the magnetic yoke is designed as a cup-shaped structure, the internal space of which can accommodate the magnet 3 and the washer 4, together forming the magnetic circuit system. This cup-shaped design not only provides stable support for the magnetic circuit system but also provides the basic structure for the formation of the integrated acoustic chamber. The support is designed as a ring-shaped disk structure, its main function being to support the vibrating system composed of the voice coil 6 and the diaphragm 7. The ring-shaped disk structure allows the support to effectively engage with the edge of the cup-shaped magnetic yoke, thereby forming a closed cavity. In practical applications, the sealed connection between the magnetic yoke and the support is achieved through a ring-shaped mating surface. This ring-shaped mating surface refers to the area where the edge of the magnetic yoke contacts the corresponding edge of the support, forming a sealed area.

[0040] The proposed solution designs the magnetic yoke as a cup-shaped structure and the support as a ring-shaped disk, allowing for assembly in a nested or mating manner. This structural configuration naturally forms a clear and easily controllable ring-shaped mating surface. This defined mating surface enables the sealing structure to be precisely placed in this area, greatly simplifying the assembly process and improving the reliability of the seal. The internal space of the cup-shaped magnetic yoke, in conjunction with the ring-shaped support, encloses an integrated acoustic chamber, ensuring the chamber's volumetric stability and airtightness, and providing a stable back pressure environment for the normal operation of the diaphragm 7.

[0041] In some preferred embodiments, the cup-shaped magnetic yoke can be formed by stamping or die casting, with a flat annular edge at its open end serving as a mating surface with the support. The annular disc-shaped support can be injection molded or stamped, and its bottom also has an annular plane that matches the edge of the magnetic yoke. During assembly, the annular plane of the support is aligned with the annular edge of the magnetic yoke, and sealant is pre-applied between them or an elastic sealing ring is placed. Then, the two are fixedly connected by screws or clips. This forms a compact, airtight integrated acoustic chamber.

[0042] Furthermore, the sealing structure is a sealant or an elastic sealing ring disposed at the annular joint surface.

[0043] The sealing structure is a sealant or an elastic sealing ring disposed at the annular joint surface.

[0044] The sealing structure refers to the material or component used to form an airtight barrier between the first support assembly 2 and the second support assembly 5. Specifically, the sealing structure can take the form of sealant or elastic sealing ring. Sealant is typically a polymer material with adhesive and curing properties, which forms a tight sealing layer after curing. An elastic sealing ring is a ring-shaped component made of elastic material (such as rubber, silicone, etc.) that generates a clamping force on the mating surface through its own elastic deformation, thereby achieving a seal. These sealing materials or components are placed at the annular mating surface between the magnetic yoke and the support to ensure the airtightness of this mating surface.

[0045] Furthermore, the ventilation channel 10 is a vent hole, and the tuning component 1 is a tuning diaphragm attached to the side of the vent hole facing the outside.

[0046] Specifically, the vent hole refers to a hole opened on the second support assembly 5 to connect the integrated acoustic chamber with the external environment. This vent hole provides a defined and controllable physical channel for airflow exchange between the integrated acoustic chamber and the external environment. The tuning diaphragm is a thin film material with specific acoustic properties, which is applied to the side of the vent hole facing outwards. Through its own material properties, thickness, and cooperation with the vent hole, the tuning diaphragm generates a preset acoustic impedance to the airflow passing through the vent hole, thereby precisely controlling the acoustic characteristics of the integrated acoustic chamber to optimize the frequency response and sound quality of the loudspeaker.

[0047] The solution of this application achieves precise control of airflow exchange within the integrated acoustic cavity by specifically configuring the ventilation channel 10 as a vent and employing a tuning diaphragm as the tuning component 1. Specifically, the vent provides a clear and controllable physical channel for airflow exchange between the integrated acoustic cavity and the external environment. Based on this, the tuning diaphragm is attached to the outside of the vent, and its material properties and structural dimensions are designed to generate a predetermined acoustic impedance to the airflow passing through the vent. Thus, when the diaphragm 7 vibrates, the air within the integrated acoustic cavity on its back side exchanges with the external environment through the vent and the tuning diaphragm. The obstruction of airflow by the tuning diaphragm creates a certain elastic damping in the air within the cavity, thereby effectively adjusting the low-frequency response and transient characteristics of the speaker and avoiding sound quality degradation caused by improper airflow exchange.

[0048] In some preferred embodiments, the vent holes can be designed as one or more circular holes on the sidewall of the second support assembly 5, the diameter and number of which can be preset according to the desired acoustic impedance characteristics. The tuning diaphragm can be made of a material with specific air permeability and acoustic damping properties, such as polyester film or non-woven fabric, and is precisely applied to the side of the vent holes facing the external environment by adhesive or hot pressing. When the tweeter is working, the vibration of the diaphragm 7 causes a change in the air pressure inside the integrated acoustic chamber, and air exchanges with the external environment through the vent holes. At this time, the tuning diaphragm dampens the airflow, effectively controlling the speed and amount of airflow exchange, thereby precisely adjusting the acoustic impedance of the integrated acoustic chamber, and thus optimizing the frequency response and sound quality performance of the tweeter.

[0049] In some embodiments described above in this application, while acoustic impedance is generated through airflow exchange within the integrated acoustic cavity via vent holes and a tuning diaphragm, the size of the vent hole significantly affects the acoustic performance of the loudspeaker, particularly its low-frequency response and damping characteristics. Inappropriate selection of the vent hole diameter can lead to inaccurate acoustic impedance control, thereby affecting the loudspeaker's sound quality.

[0050] Furthermore, the diameter of the vent hole is 0.25 mm.

[0051] Specifically, the diameter of the vent hole refers to the maximum linear dimension of its effective ventilation cross-section. Setting the vent hole diameter to 0.25mm aims to provide an optimized ventilation path for precise control of airflow exchange between the integrated acoustic chamber and the external environment. This dimension is an optimal value derived through experimental verification or simulation analysis based on acoustic principles and loudspeaker performance requirements. Its purpose is to provide appropriate acoustic impedance while ensuring sufficient airflow exchange, thereby optimizing the loudspeaker's acoustic performance.

[0052] By limiting the diameter of the vent to 0.25mm using the aforementioned technical solution, the acoustic performance of the tweeter can be significantly improved. This precisely sized vent, working in conjunction with the tuning component 1, allows the acoustic impedance within the integrated acoustic chamber to be precisely controlled within an ideal range, thereby effectively optimizing the speaker's damping characteristics and frequency response. Consequently, the speaker exhibits a flatter frequency response curve, especially in the low-frequency range, effectively suppressing unnecessary resonances, reducing distortion, resulting in a purer, more natural sound, and improving the speaker's transient response, providing users with a superior listening experience.

[0053] In some embodiments described above in this application, the ventilation channel 10 is specifically configured as a vent hole, and its diameter is defined. However, in practical applications, a vent hole of a single size may not be sufficient to meet the requirements for fine control of acoustic impedance in all scenarios, or the manufacturing process may present challenges in terms of processing accuracy and consistency of a single vent hole with an extremely small diameter.

[0054] Furthermore, the vent hole can be a single hole or an array of holes consisting of multiple micropores.

[0055] Specifically, the aforementioned vent hole can be understood as a channel connecting the integrated acoustic chamber to the external environment. When it is set as a single hole, it means that an independent hole with a specific diameter is opened on the second support component 5 to achieve airflow exchange. As a preferred embodiment, the diameter of the single hole can be set to 0.25 mm to provide a preset acoustic impedance. The aforementioned vent hole can also be an array of multiple micropores. This means that the second support component 5 does not have just one hole, but rather multiple smaller micropores distributed throughout, which together constitute the function of the vent hole. For example, the diameter of each micropore can be less than 0.25 mm, but through the combination of multiple micropores, an acoustic impedance effect similar to or more refined than that of a single 0.25 mm diameter hole can be achieved. The purpose is to provide greater design flexibility to adapt to different acoustic tuning needs and potentially improve the uniformity of airflow distribution.

[0056] This application's solution effectively addresses the limitations of a single vent structure in terms of acoustic impedance adjustment flexibility and manufacturing precision by providing two optional structural forms for the vent: a single vent or a vent array composed of multiple micro-holes. When using a single vent, the structure is simple and easy to achieve basic acoustic impedance. However, when using a vent array composed of multiple micro-holes, more precise and diverse control over the overall acoustic impedance can be achieved by adjusting the number, diameter, spacing, and arrangement of the micro-holes. For example, in scenarios requiring lower acoustic impedance or more uniform airflow distribution, a vent array can be used to reduce the overall impedance by increasing the number of micro-holes, or to optimize the airflow path by dispersing the micro-holes. This design flexibility allows the loudspeaker to achieve optimal acoustic performance in various application environments. Furthermore, the vent array design may reduce the processing difficulty of individual micro-holes and improve manufacturing yield.

[0057] In some embodiments described above in this application, acoustic impedance is generated by the tuning component 1 through the airflow exchange between the integrated acoustic chamber and the external environment. However, if the size of the tuning component 1 is not properly selected, it may lead to inaccurate acoustic impedance control, which in turn affects the frequency response and sound quality of the speaker.

[0058] Furthermore, the diameter of tuning component 1 is 3mm.

[0059] The solution in this application sets the diameter of the tuning component 1 to 3mm, enabling the tuning diaphragm to form a specific and stable acoustic impedance at the vent. Due to this specific diameter, the tuning component 1, in conjunction with the vent, can precisely regulate the air pressure changes within the integrated acoustic chamber, thereby optimizing the motion characteristics of the diaphragm 7, avoiding nonlinear distortion caused by improper airflow exchange, and ensuring that the speaker's acoustic performance within a specific frequency range meets expectations.

[0060] In some preferred embodiments, as a specific implementation, the tweeter's vent 10 is configured as a vent during assembly, and a tuning diaphragm is attached to the side of the vent facing outwards as a tuning component 1. To achieve optimal acoustic performance, this tuning diaphragm is designed and manufactured as a circular film with a diameter of 3 mm. When the speaker operates, the vibration of the diaphragm 7 causes pressure changes within the integrated acoustic chamber, which are exchanged with the external environment through the vent. The 3 mm diameter tuning diaphragm precisely controls the resistance to this airflow exchange, resulting in a flatter response, lower distortion, and superior sound quality in the high-frequency range.

[0061] Specifically, the tuning diaphragm of the tuning component 1 can be made of a variety of materials in practical applications to meet different acoustic performance, environmental adaptability and cost requirements.

[0062] Furthermore, the tuning diaphragm is made of Mylar polyester film, non-woven fabric, or microporous metal sheet.

[0063] Mylar polyester film is a film material with excellent mechanical strength, moisture resistance, and chemical stability. Its thickness and porosity can be precisely controlled, thus enabling fine adjustment of acoustic impedance. Non-woven fabric is a material made of randomly arranged and bonded fibers. It is characterized by its breathability and sound absorption properties. Acoustic impedance characteristics can be altered by adjusting fiber density and thickness, while also offering good cost-effectiveness. Microporous metal sheets refer to sheet-like structures formed by precision machining on a metal substrate, used to provide stable acoustic impedance and exhibiting excellent high-temperature resistance, corrosion resistance, and mechanical strength.

[0064] Through the above technical solutions, the tuning component 1 of the tweeter can select a suitable tuning diaphragm material according to actual needs, thereby achieving precise control and optimization of the tweeter's acoustic performance. For example, Mylar polyester film can provide stable acoustic impedance and good durability; non-woven fabric, while ensuring certain acoustic performance, has lower cost and more flexible acoustic tuning potential; while microporous metal sheets can provide extremely high structural stability and reliability in harsh environments. This diverse selection of materials allows the tweeter to better balance various factors such as acoustic performance, cost, reliability, and environmental adaptability during the design and manufacturing process, thereby improving the overall performance and market competitiveness of the tweeter.

[0065] In some embodiments described above in this application, an integrated sealed rear cavity tweeter is proposed, which includes multiple functional components. However, in practical applications, the overall size of the tweeter, especially its axial thickness, has a significant impact on its integration into various devices; excessive thickness may limit its application range or increase the complexity of product design.

[0066] Furthermore, the tweeter is composed of a tuning assembly 1, a first support assembly 2, a magnet 3, a washer 4, a second support assembly 5, a voice coil 6, and a diaphragm 7 from top to bottom, and the thickness between the top and bottom does not exceed 5mm.

[0067] Specifically, this top-to-bottom arrangement refers to the components arranged sequentially from top to bottom along the axial direction of the loudspeaker. The tuning assembly 1 is located on the outermost side, used for airflow exchange with the external environment and providing acoustic impedance. Below it is the first support assembly 2, which acts as a yoke, supporting the magnet 3 and washer 4, and together they form the magnetic circuit system. The magnet 3 and washer 4 are located below the first support assembly 2 and are the core components of the magnetic circuit system. The second support assembly 5, acting as a bracket, supports the voice coil 6 and diaphragm 7, and together with the magnetic circuit system, forms an integrated acoustic chamber. The voice coil 6 and diaphragm 7 are located below the second support assembly 5 and are the main components of the vibration system, responsible for converting electrical signals into sound waves.

[0068] The thickness of the tweeter between its top and bottom sections does not exceed 5mm, meaning that the total axial height of the speaker is strictly controlled within a small range. This thickness limitation aims to ensure that the speaker has an ultra-thin structure to suit applications with strict space requirements.

[0069] This application's solution effectively solves the problem of excessive size that traditional loudspeakers may face during integration by optimizing the arrangement of internal components and setting strict axial thickness limits. Specifically, the tuning component 1, first support component 2, magnet 3, washer 4, second support component 5, voice coil 6, and diaphragm 7 are compactly stacked in a specific top-to-bottom order, maximizing the space utilization between components. For example, the tuning component 1 is typically a thin film or microporous structure, placed on the outermost layer for convenient acoustic tuning without significantly increasing the overall thickness. The tight integration of the magnetic circuit system (first support component 2, magnet 3, washer 4) and the vibration system (second support component 5, voice coil 6, diaphragm 7) efficiently encloses the acoustic chamber internally, avoiding the need for additional space. Thus, through this ingenious structural design and strict thickness control, the tweeter achieves the goal of ultra-thin design while maintaining its acoustic performance.

[0070] Through the above technical solution, the tweeter provided in this application achieves an ultra-thin structural design, with its overall axial thickness strictly controlled within 5mm. This compact structure greatly improves the ease of integration of the tweeter into various miniaturized electronic products, such as smartphones, tablets, ultra-thin laptops, or wearable devices. Compared to solutions that do not optimize component arrangement and overall thickness, the tweeter of this application significantly reduces its footprint without sacrificing acoustic performance, providing product designers with greater freedom and helping to achieve thinner, more aesthetically pleasing end-product designs, thereby enhancing the product's market competitiveness.

[0071] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A tweeter with an integrated sealed rear cavity, characterized in that, At least including: The first support assembly (2) is a magnetic yoke used to support the magnet (3) and the washer (4), and cooperates with the magnet (3) and the washer (4) to form a magnetic circuit system; The second support assembly (5) is used to support the vibration system, which consists of a voice coil (6) and a diaphragm (7); A sealing structure is provided between the first support assembly (2) and the second support assembly (5) to achieve an airtight connection between the first support assembly (2) and the second support assembly (5) to form an integrated acoustic chamber on the back side of the diaphragm (7); Ventilation channel (10) is provided on the second support assembly (5) for connecting the integrated acoustic chamber with the external environment; A tuning component (1) is disposed on the path of the ventilation channel (10) and is used to generate acoustic impedance for airflow exchange within the integrated acoustic cavity.

2. The tweeter with an integrated sealed rear cavity according to claim 1, characterized in that, The second support component (5) is a bracket, and the integrated acoustic chamber is formed by the magnetic circuit system and the bracket together.

3. A tweeter with an integrated sealed rear cavity according to claim 2, characterized in that, The magnetic yoke has a cup-shaped structure, and the support has an annular disc-shaped structure. The magnetic yoke and the support are sealed together through an annular joint surface.

4. A tweeter with an integrated sealed rear cavity according to claim 3, characterized in that, The sealing structure is a sealant or an elastic sealing ring disposed at the annular joint surface.

5. A tweeter with an integrated sealed rear cavity according to claim 1, characterized in that, The ventilation channel (10) is a vent hole, and the tuning component (1) is a tuning diaphragm attached to the side of the vent hole facing the outside.

6. A tweeter with an integrated sealed rear cavity according to claim 5, characterized in that, The diameter of the vent hole is 0.25 mm.

7. A tweeter with an integrated sealed rear cavity according to claim 6, characterized in that, The vent hole is a single hole or an array of holes consisting of multiple micropores.

8. A tweeter with an integrated sealed rear cavity according to claim 5, characterized in that, The diameter of the tuning component (1) is 3mm.

9. A tweeter with an integrated sealed rear cavity according to claim 5, characterized in that, The tuning diaphragm is a Mylar polyester film, non-woven fabric, or microporous metal sheet.

10. A tweeter with an integrated sealed rear cavity according to claim 1, characterized in that, The tweeter is composed of the tuning component (1), the first support component (2), the magnet (3), the washer (4), the second support component (5), the voice coil (6), and the diaphragm (7) from top to bottom, and the thickness between the top and bottom does not exceed 5mm.

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