Earphone acoustic cavity structure and headphones

Abstract

The application provides an earphone acoustic cavity structure and a headphone, wherein the earphone acoustic cavity structure comprises a shell, a loudspeaker and a loudspeaker seat, an accommodating cavity with an open end is formed in the shell, and the loudspeaker seat covers the opening of the accommodating cavity; a convex rib protruding towards the inside of the accommodating cavity is arranged on the inner surface of at least one of the shell and the loudspeaker seat, the convex rib, the shell and the loudspeaker seat jointly form a mounting cavity, and the loudspeaker is mounted in the mounting cavity. Compared with the prior art, the earphone acoustic cavity structure provided by the application eliminates the independent rear cover structure, avoids subsequent assembly steps such as gluing or clamping, simplifies the overall structure, significantly reduces the production process complexity and manufacturing cost, and effectively improves the production efficiency of the earphone.

Description

Technical Field

[0001] This application relates to the field of headphone technology, and in particular to a headphone acoustic cavity structure and a headset. Background Technology

[0002] Headphones can be categorized into various types based on how they are worn, such as over-ear and in-ear headphones. Over-ear headphones, secured to the head with a headband and encased in the earcups, are widely used in daily life because they offer a more secure fit and better sound amplification compared to other types of headphones.

[0003] Traditional headphones typically consist of a speaker mount, a back cover, and an outer shell. Taking the headphones disclosed in Chinese patent document CN213638171U as an example, they employ a separate back cover design, which needs to be fixed to the speaker mount using adhesives or snap-fit ​​methods to form the speaker mounting cavity. This structure not only adds extra assembly steps but also increases manufacturing costs and process complexity, resulting in lower overall production efficiency. Utility Model Content

[0004] This invention provides a headphone acoustic cavity structure to solve the technical problem of low production efficiency caused by the complex assembly of headphone acoustic cavity structures in the prior art.

[0005] To achieve the above objectives, the earphone acoustic cavity structure proposed in this application includes a shell, a speaker, and a speaker mount. The shell has an internal cavity with an opening at one end, and the speaker mount covers the opening of the cavity. At least one of the shell and the speaker mount has a rib protruding towards the inside of the cavity on its inner surface. The rib, the shell, and the speaker mount together form a mounting cavity, and the speaker is mounted in the mounting cavity.

[0006] Optionally, in one embodiment, the rib is integrally formed with the horn seat, the rib extends along one side of the housing and abuts against the inner surface of the housing, and the rib extends circumferentially along the outer periphery of the horn to form an annular limiting structure.

[0007] Optionally, in one embodiment, the rib is integrally formed with the outer shell, the rib extends along one side of the horn seat and abuts against the inner surface of the horn seat, and the rib extends circumferentially along the outer periphery of the horn to form an annular limiting structure.

[0008] Optionally, in one embodiment, the rib includes a first annular rib disposed on the outer shell and a second annular rib disposed on the horn seat, wherein the first annular rib and the second annular rib are disposed opposite to each other and are adapted in shape and size.

[0009] Optionally, in one embodiment, a sealing element is provided at the connection between the first annular rib and the second annular rib.

[0010] Optionally, in one embodiment, the inner wall of the second annular rib is provided with a plurality of support blocks, the plurality of support blocks are arranged in a circumferential array, and the bottom of the speaker is mounted on the plurality of support blocks.

[0011] Optionally, in one embodiment, the earphone acoustic cavity structure further includes an ear sleeve, which is connected to the side of the speaker mount facing away from the outer shell, and the support block is spaced apart from the dustproof mesh of the ear sleeve.

[0012] Optionally, in one embodiment, the cross-sectional shape of the first annular rib and the second annular rib is any one of a circle, an ellipse, a rectangle, or a triangle.

[0013] Optionally, in one embodiment, the inner wall surface of the housing corresponding to the mounting cavity is an arc-shaped curved surface; the rib is provided with a through hole, a circuit board is fixedly connected to the speaker seat, and the speaker and the circuit board are electrically connected through the through hole.

[0014] This application also proposes a headset, which includes a headband and two or more of the aforementioned headphone acoustic chamber structures, with the two headphone acoustic chamber structures respectively disposed at both ends of the headband.

[0015] The headphone acoustic cavity structure provided in this application has a mounting cavity for mounting a speaker formed by providing a protruding rib on the inner surface of at least one of the outer shell and the speaker mount, which together with the outer shell and the speaker mount. Compared with the prior art, this application eliminates the need for a separate back cover structure, avoids subsequent assembly steps such as gluing or snapping, simplifies the overall structure, and significantly reduces the complexity of the production process and manufacturing cost, thereby effectively improving the production efficiency of headphones. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional schematic diagram of an earphone acoustic cavity structure provided in an embodiment of this application;

[0018] Figure 2 A cross-sectional schematic diagram of the headphone acoustic cavity structure provided in another embodiment of this application;

[0019] Figure 3 This is a cross-sectional schematic diagram of the headphone acoustic cavity structure provided in another embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the structure of the headphones provided in this application.

[0021] Explanation of icon numbers:

[0022] 10 shell 41 First annular rib 50 Mounting cavity 11 Receiving cavity 42 Second annular rib 60 earmuffs 20 Speaker base 421 support block 61 Dustproof net 30 trumpet 43 Seals 70 circuit board 40 ribs 44 Through hole

[0023] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] This application provides a headphone acoustic cavity structure to solve the technical problem that the complex assembly of headphone acoustic cavity structures in the prior art leads to low production efficiency. The following description is in conjunction with the accompanying drawings.

[0026] In the embodiments of this application, such as Figure 1-3 As shown, the headphone acoustic cavity structure includes a shell 10, a speaker 30, and a speaker base 20. The shell 10 has an internal cavity 11 with an opening at one end, and the speaker base 20 covers the opening of the cavity 11. At least one of the shell 10 and the speaker base 20 has a rib 40 protruding towards the inside of the cavity 11 on its inner surface. The rib 40, the shell 10, and the speaker base 20 together form a mounting cavity 50, and the speaker 30 is mounted in the mounting cavity 50.

[0027] It should be noted that the traditional headphone acoustic cavity structure usually includes a speaker mount, a back cover, and an outer shell. The outer shell is placed on the speaker mount, and the back cover is located inside the outer shell and is fixed to the speaker mount by means of adhesive, snap-fit, etc. The back cover and the speaker mount enclose a mounting cavity for mounting the speaker. Due to the use of an independent back cover design, not only is an additional assembly step added, but manufacturing costs and process complexity are also increased, reducing the overall production efficiency.

[0028] Therefore, this application provides an earphone acoustic cavity structure, by providing a protruding rib 40 protruding towards the interior of the receiving cavity 11 on the inner surface of at least one of the outer shell 10 and the speaker seat 20, and the protruding rib 40, together with the outer shell 10 and the speaker seat 20, forming a mounting cavity 50 for mounting the speaker 30. Compared with the prior art, this application eliminates the separate back cover structure, avoids subsequent assembly steps such as gluing or snapping, not only simplifies the overall structure, but also significantly reduces the complexity of the production process and manufacturing cost, thereby effectively improving the production efficiency of earphones.

[0029] For details, please refer to Figure 1 The outer casing 10 is manufactured using a one-piece molding process. Its shape can be designed as a semi-ellipsoidal or hemispherical bowl-shaped structure. The interior of the outer casing 10 is hollow to form a receiving cavity 11, which is used to install internal components such as batteries, circuit boards 70, and sensors. In production, the outer casing 10 can be made of plastic (such as ABS or polycarbonate) or metal. If plastic is used, its texture can be enhanced by surface electroplating with metal, achieving a metallic appearance and feel.

[0030] In the above embodiments, the speaker base 20 and the housing 10 can be fixed by clips and screws, or a more reliable fixation can be achieved by using both clips and screws. Specifically, protruding tenons can be provided on the edge of the speaker base 20, and matching grooves can be pre-set at corresponding positions on the inner wall of the housing 10. The speaker base 20 and the housing 10 are initially fixed by snapping the tenons into the grooves. Furthermore, multiple screw holes can be provided at corresponding positions on the speaker base 20 and the housing 10, and the two can be further fixed by passing screws through the corresponding screw holes on the housing 10 and the speaker base 20 in sequence. This composite connection method not only improves the durability of the product, but also helps to maintain the stability of the acoustic structure. In addition, sealant can be applied to the joint between the speaker base 20 and the housing 10 to enhance airtightness, effectively prevent sound leakage, and ensure low-frequency response performance.

[0031] In this embodiment, the inner surface of the outer casing 10, i.e., the surface of the outer casing 10 facing the speaker base 20, is generally arc-shaped; while the inner surface of the speaker base 20, i.e., the surface of the speaker base 20 facing the outer casing 10, is generally planar. The protruding rib 40 may be provided only on either the outer casing 10 or the speaker base 20, or may be provided on both. This application does not limit this, as long as the outer casing 10, the speaker base 20, and the protruding rib 40 together form a mounting cavity 50 for mounting the speaker 30. Furthermore, the protruding rib 40 may be integrally formed with the outer casing 10 or the speaker base 20, or may be fixed to the outer casing 10 or the speaker base 20 by adhesive.

[0032] The mounting cavity 50 is an approximately circular dome-shaped structure, which serves to provide the set sound wave damping for the speaker 30 and suppress the interference of airflow on the operation of the speaker 30. As the core component of the headphone's sound generation, the speaker 30 is used to convert electrical signals into sound waves. It mainly consists of a voice coil, a permanent magnet, and a diaphragm, where the diaphragm is usually designed to be conical or hemispherical. In this embodiment, when assembling the speaker 30, the permanent magnet is arranged facing the outer shell 10, and the diaphragm is arranged facing the speaker mount 20. When the electrical signal is transmitted to the voice coil, as the strength and direction of the electrical signal change, a corresponding alternating current is generated in the voice coil, thereby forming a changing electromagnetic field. This electromagnetic field interacts with the constant magnetic field of the permanent magnet, driving the voice coil to reciprocate back and forth. The voice coil drives the diaphragm, which is closely connected to it, to vibrate together. The diaphragm pushes the surrounding air to form alternating dense and sparse sound waves, which are ultimately transmitted to the ear.

[0033] Optionally, in one embodiment, please refer to Figure 1 The rib 40 is integrally formed with the horn seat 20. The rib 40 extends along one side of the outer shell 10 and abuts against the inner surface of the outer shell 10. The rib 40 extends circumferentially along the outer periphery of the horn 30 to form an annular limiting structure.

[0034] In this embodiment, the rib 40 and the speaker base 20 are integrally injection molded. The integrally molded structure not only has high strength and good sealing performance, but also simplifies production assembly and improves product production efficiency. The rib 40 can also be made of a plastic material with a certain degree of toughness, so that the rib 40 itself can absorb some of the energy generated by the vibration of the speaker 30, which helps to reduce the vibration transmitted to the outer shell 10, thereby suppressing unnecessary resonance and having a positive effect on improving sound quality.

[0035] Specifically, the rib 40 extends from the inner surface of the speaker base 20 toward the outer shell 10. Its extension path is adapted to the curvature of the inner surface of the outer shell 10 and keeps in contact with it, thereby forming a sealed mounting cavity 50 with the outer shell 10. This provides a preset sound wave damping environment for the speaker 30 and isolates unnecessary sound coupling and airflow conduction.

[0036] The raised rib 40 extends continuously circumferentially along the outer periphery of the horn 30, forming an open annular limiting structure. This annular limiting structure is used to limit the horn 30, preventing it from moving or shaking within the mounting cavity 50. Preferably, both the raised rib 40 and the horn 30 are annular, with the inner diameter of the raised rib 40 slightly larger than the maximum outer diameter of the horn 30. This not only facilitates accurate positioning of the horn 30 during installation but also allows for rapid assembly, improving production efficiency.

[0037] In this embodiment, the rib 40 and the speaker base 20 are integrally formed, achieving precise positioning, robust fixation, and effective sealing of the speaker 30. This design significantly improves the consistency of the headphone's acoustic performance, production efficiency, and structural reliability, while reducing production costs.

[0038] Optionally, in one embodiment, please refer to Figure 2 The rib 40 is integrally formed with the outer shell 10. The rib 40 extends along one side of the horn seat 20 and abuts against the inner surface of the horn seat 20. The rib 40 extends circumferentially along the outer periphery of the horn 30 to form an annular limiting structure.

[0039] In this embodiment, the rib 40 and the outer shell 10 are manufactured by integral injection molding. The rib 40 extends from the inner surface of the outer shell 10 toward the speaker seat 20. Its extension path is adapted to the curvature of the inner surface of the speaker seat 20 and keeps in contact with it, thereby forming a sealed mounting cavity 50 with the speaker seat 20. This provides a preset sound wave damping environment for the speaker 30 and isolates unnecessary sound coupling and airflow conduction.

[0040] Specifically, the rib 40 extends continuously circumferentially along the outer periphery of the intended mounting position of the horn 30, thereby forming an open annular limiting structure on the housing 10. This annular limiting structure is used to limit the horn 30 and prevent the horn 30 from moving or shaking within the mounting cavity 50.

[0041] In this embodiment, the rib 40 is integrally formed with the outer shell 10, achieving precise positioning, robust fixation, and effective sealing of the speaker 30. This design significantly improves the consistency of the headphone's acoustic performance, production efficiency, and structural reliability, while reducing production costs.

[0042] Optionally, in one embodiment, please refer to Figure 3 The rib 40 includes a first annular rib 41 disposed on the outer shell 10 and a second annular rib 42 disposed on the horn seat 20. The first annular rib 41 and the second annular rib 42 are disposed opposite to each other and are adapted in shape and size.

[0043] Specifically, the first annular rib 41 and the second annular rib 42 can be designed as separate symmetrical parts. The first annular rib 41 is integrally injection molded with the outer shell 10 and extends from the inner surface of the outer shell 10 toward the horn seat 20; the second annular rib 42 is integrally injection molded with the horn seat 20 and extends from the inner surface of the horn seat 20 toward the outer shell 10. The first annular rib 41 and the second annular rib 42 are precisely aligned in space, and their radial positions, annular paths, and heights are matched with each other, so that in the assembled state, the first annular rib 41 and the second annular rib 42 can face each other axially and abut tightly together, forming a composite sealed cavity structure.

[0044] Furthermore, the first annular rib 41 and the second annular rib 42 have the same or very similar inner and outer diameters to ensure complete radial alignment, forming a continuous and uniform sealing ring and preventing seal failure due to misalignment. After the outer shell 10 and the horn seat 20 are assembled and locked, the end faces of the first annular rib 41 and the second annular rib 42 are pressed together axially. In this embodiment, the end faces of the first annular rib 41 and the second annular rib 42 are both planes, forming a two-plane abutment seal; in other embodiments, the end face of the first annular rib 41 can also be set as an outwardly convex arc surface, and the end face of the second annular rib 42 as an inwardly concave arc surface. The cooperation of the two arc surfaces achieves a better sealing effect, and the arc surface contact can extend the sealing path and further improve the sealing performance.

[0045] In this embodiment, by setting a split first annular rib 41 and a second annular rib 42, the sealing performance and mechanical properties are significantly improved compared to the single rib 40 scheme. It can be understood that the double rib 40 structure constitutes a redundant sealing system, greatly enhancing the sealing reliability of the acoustic cavity during long-term use, effectively suppressing sound leakage and airflow interference, and providing a stable and clean acoustic working environment for the speaker 30. Simultaneously, the assembly preload is shared by the first annular rib 41 and the second annular rib 42, avoiding stress concentration on a single component, reducing the risk of deformation of the outer shell 10 and the speaker mount 20 due to stress, and enhancing the rigidity and durability of the overall structure.

[0046] Optionally, in one embodiment, please refer to Figure 3 To further improve sealing reliability, an independent sealing element 43 is provided at the axial joint of the first annular rib 41 and the second annular rib 42. The sealing element 43 is accommodated in the sealing area formed by the ends of the two ribs 40.

[0047] For example, the seal 43 may be made of an elastic material with excellent resilience and aging resistance, such as silicone rubber, polyurethane foam or soft thermoplastic elastomer (TPE), so that the seal 43 undergoes compression deformation after assembly and pressure, which can effectively fill the micro-unevenness and assembly gap of the mating surface of the first annular rib 41 and the second annular rib 42, thereby achieving a tighter seal and enhancing the overall sealing effect.

[0048] In other embodiments, the sealant 43 may also be a liquid or paste-like sealant, which is applied to the end faces of the first annular rib 41 and / or the second annular rib 42. During the locking process, the sealant is squeezed and filled into the irregular gaps, and after curing, it forms a permanent sealing layer, thereby enhancing the overall sealing effect.

[0049] Optionally, in one embodiment, please refer to Figures 1-3Since the speakers 30 in headphones are mostly dynamic speakers, their sound quality is closely related to the space and air pressure on both sides of the speakers 30. Therefore, in order to achieve a more accurate installation of the speakers 30, in this embodiment, multiple support blocks 421 are provided on the inner wall of the second annular rib 42, and the bottom of the speakers 30 is installed on the multiple support blocks 421.

[0050] Specifically, multiple support blocks 421 are integrally formed with the second annular rib 42, creating a complete rigid structure between the support blocks 421 and the second annular rib 42. This ensures that the multiple support blocks 421 have high positional accuracy and structural strength. The multiple support blocks 421 are arrayed along the circumference of the second annular rib 42, ensuring that the speaker 30 receives uniform and stable support in all directions, preventing tilting or stress concentration caused by uneven support. Simultaneously, it ensures that the speaker 30 can be placed horizontally after installation, maintaining the correct position of the speaker 30's sound output channel and avoiding any impact on sound quality.

[0051] Optionally, in one embodiment, please refer to Figure 1 The headphone acoustic cavity structure also includes an ear cup 60, which is connected to the side of the speaker mount 20 facing away from the outer shell 10 (i.e., the side closest to the ear), together forming the acoustic coupling part that contacts the ear. A dustproof mesh 61 is typically provided on this side of the speaker mount 20 to prevent external foreign objects from entering the headphone acoustic cavity structure. The support block 421 and the dustproof mesh 61 maintain a certain axial distance, creating a sound buffer space between the speaker 30 and the dustproof mesh 61. This prevents the speaker 30 from contacting the dustproof mesh 61 when vibrating, while simultaneously improving the acoustic performance of the headphones.

[0052] Optionally, in one embodiment, the cross-sectional shape of the first annular rib 41 and the second annular rib 42 can be designed in various ways, and can be any one of a circle, ellipse, rectangle, or triangle. It should be noted that the cross-sectional shape refers to the cross-sectional shape obtained by cutting with a plane perpendicular to the center extension direction of the first annular rib 41 and the second annular rib 42.

[0053] Preferably, the cross-sections of the first annular rib 41 and the second annular rib 42 are circular. Circular cross-sections have no sharp edges, uniform stress distribution, and can provide uniform radial sealing force under pressure, exhibiting good durability and being relatively easy to manufacture.

[0054] Optionally, in one embodiment, please refer to Figure 1The inner wall surface of the outer casing 10, corresponding to the mounting cavity 50, is constructed as an arc-shaped curved surface. This causes sound waves to be reflected diffusely rather than directionally when reflected on its surface, effectively dispersing sound energy and preventing strong standing waves and resonance peaks from forming due to back-and-forth superposition at specific frequencies within the cavity. This significantly reduces sound coloration, making the sound purer and more natural. Based on a preset radius of curvature, this arc-shaped surface can optimize the reflection path of mid-to-high frequency sound waves, acting as acoustic damping, smoothing the entire frequency response curve, and improving the listening experience.

[0055] The rib 40 has a through hole 44. The horn seat 20 is fixedly connected to the circuit board 70. The horn 30 and the circuit board 70 are electrically connected through the through hole 44. The through hole 44 provides a reliable wiring path for the electrical connection between the horn 30 and the circuit board 70, avoiding the wire harness from being tangled in the receiving cavity 11 and reducing the risk of accidental breakage or interference with components such as the horn 30.

[0056] This application also provides a headset, such as... Figure 4 As shown, the headphones include a headband and two earphone acoustic chamber structures. The specific structure of the earphone acoustic chamber structures is as described in the above embodiments. Since this headset adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The two earphone acoustic chamber structures are respectively located at both ends of the headband.

[0057] In the above embodiments, the descriptions of each embodiment have different focuses. Parts not described in detail in a particular embodiment can be referred to in the relevant descriptions of other embodiments. In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0058] The above provides a detailed description of the headphone acoustic cavity structure provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A headphone acoustic cavity structure, characterized in that, The device includes a housing, a horn, and a horn seat. The housing has an open cavity at one end, and the horn seat covers the opening of the cavity. At least one of the housing and the horn seat has a rib protruding towards the inside of the cavity on its inner surface. The rib, the housing, and the horn seat together form a mounting cavity, and the horn is mounted in the mounting cavity.

2. The headphone acoustic cavity structure according to claim 1, characterized in that, The rib is integrally formed with the horn seat. The rib extends along one side of the outer shell and abuts against the inner surface of the outer shell. The rib extends circumferentially along the outer periphery of the horn to form a ring-shaped limiting structure.

3. The headphone acoustic cavity structure according to claim 1, characterized in that, The rib is integrally formed with the outer shell, the rib extends along one side of the horn seat and abuts against the inner surface of the horn seat, and the rib extends circumferentially along the outer periphery of the horn to form an annular limiting structure.

4. The headphone acoustic cavity structure according to claim 1, characterized in that, The ribs include a first annular rib disposed on the outer shell and a second annular rib disposed on the horn seat. The first annular rib and the second annular rib are disposed opposite to each other and are adapted in shape and size.

5. The headphone acoustic cavity structure according to claim 4, characterized in that, A sealing element is provided at the connection between the first annular rib and the second annular rib.

6. The headphone acoustic cavity structure according to claim 4, characterized in that, The inner wall of the second annular rib is provided with multiple support blocks, which are arranged in a circumferential array, and the bottom of the speaker is mounted on the multiple support blocks.

7. The headphone acoustic cavity structure according to claim 6, characterized in that, The earphone acoustic cavity structure also includes an ear sleeve, which is connected to the side of the speaker mount facing away from the outer shell, and the support block is spaced apart from the dustproof mesh of the ear sleeve.

8. The headphone acoustic cavity structure according to claim 4, characterized in that, The cross-sectional shape of the first annular rib and the second annular rib is any one of a circle, an ellipse, a rectangle or a triangle.

9. The headphone acoustic cavity structure according to claim 1, characterized in that, The inner wall surface of the outer shell corresponding to the mounting cavity is an arc-shaped curved surface; The rib has a through hole, and a circuit board is fixedly connected to the speaker base. The speaker and the circuit board are electrically connected through the through hole.

10. A type of over-ear headphone, characterized in that, It includes a headband and two headphone acoustic chamber structures as described in any one of claims 1 to 9, wherein the two headphone acoustic chamber structures are respectively disposed at both ends of the headband.

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