Bone conduction loudspeaker with good sealing

Abstract

The utility model relates to bone conduction loudspeaker technical field, especially in good sealing bone conduction loudspeaker, including shell, the shell is sleeved and has magnetic circuit assembly, the shell upper end is sleeved and has first sealing assembly, the shell lower end is sleeved and has second sealing assembly. The utility model relates to a kind of bone conduction loudspeaker with good sealing, the sealing snap ring of first sealing assembly is embedded into shell sealing snap groove, sealing ring fills the gap between shell cover and shell inner wall, second sealing assembly mirror image acts on shell lower end, cooperates to prevent dust, water vapor invasion, after energization, circuit board copper coil and U cup magnet interact to generate magnetic field, drive opening spring sheet vibration, conduct to shell through U cup, complete sound transmission by skeleton, first sealing assembly, second sealing assembly continuously block pollutant in this process, guarantee magnetic circuit assembly, circuit board stable operation, realize long-term reliable sound production under complex environment, improve product practicability and durability.

Description

Technical Field

[0001] This utility model relates to the field of bone conduction speaker technology, and in particular to a bone conduction speaker with good sealing performance. Background Technology

[0002] Bone conduction speakers, as key sound-generating components in headphones and hearing aids, work by converting electrical signals into mechanical vibrations, which are then transmitted through the human skeleton to the auditory nerve to conduct sound. Compared to traditional air conduction speakers, they do not require sound to travel through the air, offering significant advantages in noisy environments or situations involving hearing impairment.

[0003] However, existing bone conduction speakers, due to their simple structural design, are prone to gaps at the joints. External dust and moisture (especially in rainy or humid environments) can easily penetrate the internal space and come into contact with the core components. Dust accumulation affects vibration sensitivity, while moisture corrosion accelerates the aging and corrosion of electronic components, leading to decreased sound quality, frequent malfunctions, and significantly shortening the lifespan of the bone conduction speaker, limiting its stable application in complex environments. Therefore, we have introduced a bone conduction speaker with better sealing. Utility Model Content

[0004] The main objective of this invention is to provide a bone conduction speaker with good sealing performance, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A well-sealed bone conduction speaker includes a housing, a magnetic circuit assembly sleeved inside the housing, a first sealing assembly sleeved at the upper end of the housing, and a second sealing assembly sleeved at the lower end of the housing.

[0007] Preferably, the first sealing assembly includes a cover, a sealing ring is fixedly connected to the lower end of the cover, and a sealing ring is fixedly connected to the inner wall surface of the cover.

[0008] By adopting the above technical solution, the shell cover, sealing ring, and sealing ring work together to construct the upper sealing structure. The sealing ring is embedded in the corresponding position to initially limit and seal, and the sealing ring further fills the gap between the shell cover and the inner wall of the outer shell, improving the sealing performance of the upper part of the outer shell and preventing foreign objects from intruding from the top.

[0009] Preferably, the outer shell includes a housing, a base frame is fitted inside the lower part of the housing, and sealing grooves are provided at both the upper and lower edges of the housing.

[0010] By adopting the above technical solution: the base frame provides a stable installation foundation for the magnetic circuit assembly, allowing the U cup to have reliable support inside the shell, while the sealing groove provides a structural foundation for the sealing rings of the first sealing assembly and the second sealing assembly to be adapted, which facilitates the precise and stable connection between the sealing assembly and the shell, and helps to build the overall sealing system.

[0011] Preferably, the magnetic circuit assembly includes a U-cup and a circuit board. The upper edge of the U-cup has an opening, and a spring is fixedly connected inside the opening. A magnet is fixedly connected to the lower end of the U-cup. The U-cup is fitted inside the housing and located on the base frame.

[0012] By adopting the above technical solution: the U-cup serves as the core carrier of the magnetic circuit, and the opening and spring piece work with the magnet to construct the basic structure for magnetic circuit vibration transmission, providing necessary component support for bone conduction sound generation (electrical signal-magnetic effect-mechanical vibration conversion) and ensuring the realization of sound transmission function.

[0013] Preferably, the lower part of the circuit board is fitted into the opening, and the copper coils on the circuit board are arranged corresponding to the spring contacts.

[0014] By adopting the above technical solution, the copper coil on the circuit board is precisely aligned with the spring. After being powered on, the magnetic field generated by the copper coil can act efficiently on the spring, so that the electrical signal is stably converted into the mechanical vibration of the spring, improving the energy conversion efficiency and ensuring the sound quality and loudness output of bone conduction.

[0015] Preferably, the sealing ring is fitted into the corresponding sealing groove and is in close contact with the inner wall of the sealing groove, and the sealing ring is fitted into the housing and is in close contact with the inner wall of the housing.

[0016] By adopting the above technical solution, the matching of the sealing ring and the sealing groove achieves the initial sealing and connection at the structural level, and the sealing ring fills the micro gaps. The two work together from the macro structure to the micro gaps, which greatly improves the sealing reliability and effectively prevents dust and moisture from entering the shell.

[0017] Preferably, the second sealing component and the first sealing component have the same structure and are distributed in a mirror image.

[0018] By adopting the above technical solution: utilizing the symmetrical structure with the first sealing component, the lower end of the shell is sealed and protected to the same level, forming a double seal with the first sealing component, which fully encloses the internal space of the shell, eliminates the weak point of the lower seal, and strengthens the overall sealing performance.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In this invention, a multi-layered sealing protection system is constructed by integrating a shell, a magnetic circuit assembly, a first sealing assembly, and a second sealing assembly. During use, after the bone conduction speaker is integrated into the earphone or hearing aid, the sealing ring of the first sealing assembly is embedded in the sealing groove of the shell, and the sealing ring fills the gap between the shell cover and the inner wall of the shell. The second sealing assembly acts as a mirror image on the lower end of the shell, working together to prevent dust and moisture intrusion. After power is applied, the copper coil of the circuit board interacts with the U-cup magnet to generate a magnetic field, driving the open spring to vibrate. The vibration is conducted through the U-cup to the shell, and sound transmission is completed via the bone structure. During this process, the first and second sealing assemblies continuously block contaminants, ensuring the stable operation of the magnetic circuit assembly and the circuit board. After the device is powered off, the first and second sealing assemblies remain sealed, delaying the aging of internal components. This fundamentally solves the problems of sound quality degradation and shortened lifespan caused by insufficient sealing in traditional bone conduction speakers, enabling long-term reliable sound output in complex environments and improving the product's practicality and durability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a bone conduction speaker with good sealing performance according to this utility model;

[0022] Figure 2 This is an exploded view of the overall structure of a bone conduction speaker with good sealing performance according to this utility model;

[0023] Figure 3 This is a schematic diagram of the outer shell of a bone conduction speaker with good sealing performance according to this utility model;

[0024] Figure 4 This is a cross-sectional view of the outer shell of a bone conduction speaker with good sealing performance according to this utility model (the shell is cut out).

[0025] Figure 5 This is a schematic diagram of the magnetic circuit assembly of a bone conduction speaker with good sealing performance according to this utility model.

[0026] Figure 6 This is an exploded view of the magnetic circuit assembly of a bone conduction speaker with good sealing performance according to this utility model.

[0027] Figure 7 This is a bottom view of the combined connection structure of the U-cup and magnet in a bone conduction speaker with good sealing performance according to this utility model.

[0028] Figure 8 This is a schematic diagram of the structure of the first sealing component of a bone conduction speaker with good sealing performance according to this utility model;

[0029] Figure 9 This is a cross-sectional view of the first sealing component of a bone conduction speaker with good sealing performance according to the present invention (the shell cover and sealing ring are cut out).

[0030] In the diagram: 1. Outer shell; 2. Magnetic circuit assembly; 3. First sealing assembly; 4. Second sealing assembly; 11. Shell; 12. Base frame; 13. Sealing slot; 21. U-cup; 22. Opening; 23. Spring; 24. Circuit board; 25. Magnet; 31. Shell cover; 32. Sealing ring; 33. Sealing ring. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0032] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Please see Figure 1-9 This utility model provides a technical solution:

[0035] A bone conduction speaker with good sealing performance includes a housing 1, a magnetic circuit assembly 2 sleeved inside the housing 1, a first sealing assembly 3 sleeved at the upper end of the housing 1, and a second sealing assembly 4 sleeved at the lower end of the housing 1.

[0036] In this embodiment, the first sealing assembly 3 includes a cover 31, a sealing ring 32 is fixedly connected to the lower end of the cover 31, and a sealing ring 33 is fixedly connected to the inner wall of the cover 31; the outer shell 1 includes a shell 11, a base frame 12 is sleeved inside the lower part of the shell 11, and sealing grooves 13 are opened at both the upper and lower edges of the shell 11; the magnetic circuit assembly 2 includes a U-cup 21 and a circuit board 24, an opening 22 is opened at the upper edge of the U-cup 21, a spring piece 23 is fixedly connected inside the opening 22, and the lower end of the U-cup 21 is fixed A magnet 25 is connected to the U-cup 21, which is fitted inside the housing 11 and located on the base frame 12; the lower part of the circuit board 24 is fitted inside the opening 22, and the copper coil on the circuit board 24 is correspondingly set with the spring piece 23; the sealing ring 32 is fitted inside the corresponding sealing groove 13 and is in close contact with the inner wall of the sealing groove 13; the sealing ring 33 is fitted inside the housing 11 and is in close contact with the inner wall of the housing 11; the second sealing component 4 and the first sealing component 3 have the same structure and are distributed in a mirror image.

[0037] It should be noted that this utility model is a bone conduction speaker with good sealing performance. In use, the bone conduction speaker is integrated into headphones or hearing aids. The first sealing component 3 and the second sealing component 4 respectively seal the upper and lower ends of the housing 11. The magnetic circuit component 2 is located in the sealed space inside the housing 11. After the device is powered on, the current is transmitted to the circuit board 24. The copper coil on the circuit board 24 generates an alternating magnetic field. This magnetic field interacts with the magnet 25 at the lower end of the U-cup 21, causing the spring 23 in the opening 22 to vibrate. The vibration of the spring 23 is transmitted to the U-cup 21, and then conducted from the U-cup 21 to the housing 11. The housing 11 transmits the vibration. The sound is transmitted to the bones through the contact points with the human body, realizing bone conduction sound generation. During the sound generation process, the sealing ring 32 of the first sealing component 3 is tightly engaged with the sealing groove 13 at the upper end of the housing 11, and the sealing ring 33 further fills the gap between the inner wall of the housing 11 and the cover 31. The second sealing component 4 seals the lower end of the housing 11 in the same way. The multiple sealing structures work together to prevent dust and moisture from entering the interior of the housing 11. After the device is stopped and the power is turned off, the spring 23 stops vibrating, the bone conduction speaker stops emitting sound, and the first sealing component 3 and the second sealing component 4 continue to maintain a sealed state, protecting the internal magnetic circuit component 2 from the influence of the external environment.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A bone conduction speaker with good sealing performance, comprising a housing (1), characterized in that: A magnetic circuit assembly (2) is fitted inside the outer shell (1), a first sealing assembly (3) is fitted at the upper end of the outer shell (1), and a second sealing assembly (4) is fitted at the lower end of the outer shell (1). The first sealing assembly (3) includes a cover (31), a sealing ring (32) is fixedly connected to the lower end of the cover (31), and a sealing ring (33) is fixedly connected to the inner wall surface of the cover (31).

2. The bone conduction speaker with good sealing performance according to claim 1, characterized in that: The outer shell (1) includes a shell (11), a base frame (12) is sleeved inside the lower part of the shell (11), and sealing grooves (13) are opened at the upper edge and the lower edge of the shell (11).

3. The bone conduction speaker with good sealing performance according to claim 1, characterized in that: The magnetic circuit assembly (2) includes a U-cup (21) and a circuit board (24). The upper edge of the U-cup (21) has an opening (22), and a spring piece (23) is fixedly connected inside the opening (22). A magnet (25) is fixedly connected to the lower end of the U-cup (21). The U-cup (21) is fitted inside the housing (11) and is located on the base frame (12).

4. A bone conduction speaker with good sealing performance according to claim 3, characterized in that: The lower part of the circuit board (24) is fitted into the opening (22), and the copper coil on the circuit board (24) is correspondingly set with the spring piece (23).

5. A bone conduction speaker with good sealing performance according to claim 1, characterized in that: The sealing ring (32) is fitted into the corresponding sealing groove (13) and is in close contact with the inner wall of the sealing groove (13). The sealing ring (33) is fitted into the housing (11) and is in close contact with the inner wall of the housing (11).

6. A bone conduction speaker with good sealing performance according to claim 1, characterized in that: The second sealing component (4) and the first sealing component (3) have the same structure and are distributed in a mirror image.

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