Device and method for reducing sound leakage of bone conduction vibrator in product

Abstract

The invention relates to the technical field of fixing methods and fixing devices of bone conduction vibrators, in particular to a device for reducing sound leakage of a bone conduction vibrator in a product and a fixing method of the device, and the device comprises a vibration transmission cabin which comprises an upper shell part and a lower shell part; the bone conduction vibrator is fixed on the vibrator bracket to form a vibrator bracket assembly; the soft material component is connected with the vibrator bracket assembly and the lower shell part; wherein the acoustic impedance of the material of the outward or peripheral curved surface of the shell of the vibration transmission cabin is within the range of [0.05, infinity] * 10 < 6 > Rayleigh (kg / m < 2 >. S); the vibrator support assembly is located on the upper shell part and is directly or indirectly connected with the lower shell part through the upper shell part, and through a separated structure and flexible connection, the path of vibration spreading outwards is effectively blocked, and the sound leakage problem is reduced. The vibrator support assembly is located on the upper shell part, it is ensured that vibration energy is mainly conducted towards the human body, and the bone conduction effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of a method and device for fixing a bone conduction vibrator, and more specifically, to a device for reducing sound leakage of a bone conduction vibrator in a product and a method for fixing the device. Background Art

[0002] As an innovative way of sound transmission, bone conduction technology has attracted much attention in the field of wearable devices in recent years. Different from the traditional air conduction method, bone conduction technology uses the skull to directly transmit sound vibrations, bypassing some structures of the human ear and transmitting sound signals directly to the inner ear to form auditory perception. This unique way of sound transmission makes bone conduction technology show great application potential in hearing aids, smart glasses, sports headphones and other products.

[0003] With the continuous development of bone conduction technology, its application in smart wearable devices is becoming more and more extensive. In particular, in digital products or communication devices such as headphones, hearing aids, and smart glasses, bone conduction technology has shown its unique advantages. For example, in sports scenes, bone conduction headphones allow users to maintain awareness of the surrounding environment while listening to music; in terms of assisted hearing, bone conduction hearing aids can help some patients who cannot use traditional hearing aids due to ear canal or middle ear problems.

[0004] However, with the popularity of bone conduction products, some technical problems have gradually emerged. One of the most prominent problems is the sound leakage of the bone conduction vibrator in the product. The traditional way of fixing the bone conduction vibrator is usually to fix the vibrator directly on the hard structure or shell of the product. Although this method ensures the stability of the vibrator fixation to a certain extent, there are several major problems in actual use:

[0005] 1. Serious sound leakage: Since the vibrator is in direct contact with the hard structure, the vibration can easily be transmitted through the structure to the product casing, causing sound to leak outward, affecting the user experience and privacy.

[0006] 2. Low vibration conduction efficiency: The fixing method of the rigid structure disperses the vibration energy, making it difficult to form high-quality directional conduction, thus reducing the effect of bone conduction.

[0007] 3. Poor wearing comfort: Rigid connections can easily generate greater local pressure during use, and long-term use will affect wearing comfort.

[0008] 4. Limited product life: Lack of effective shock-absorbing structure. Long-term use may cause the performance of the bone conduction vibrator to deteriorate or even be damaged.

[0009] 5. Unstable acoustic performance: Direct contact between the vibrator and the casing may cause collisions and scratches, generate additional noise, and affect the overall acoustic performance.

[0010] The industry has been seeking better solutions to these problems. Some existing technologies try to reduce sound leakage by adding cushioning materials or improving the fixing structure, but the results are often unsatisfactory. For example, simply adding cushions around the vibrator can reduce vibration transmission to a certain extent, but it may also affect the effective conduction of vibration, resulting in a decrease in bone conduction effect.

[0011] Therefore, how to effectively reduce sound leakage while ensuring the bone conduction effect has become a key issue restricting the further development and application of bone conduction technology. This requires an innovative solution that can balance vibration conduction efficiency and vibration isolation effect. Summary of the invention

[0012] The present invention is proposed to solve the above technical problems. Through innovative structural design and material selection, the present invention provides a device and method for reducing sound leakage of bone conduction vibrators in products. The device adopts a separate vibration cabin structure, combines the selection of materials within a specific acoustic impedance range, and introduces a soft material connection method, which effectively solves the problems existing in the prior art.

[0013] To achieve the above object, the present invention provides the following technical solution: a device for reducing sound leakage of a bone conduction vibrator in a product, comprising:

[0014] A vibration transmission cabin, the vibration transmission cabin comprising an upper shell portion and a lower shell portion;

[0015] A bone conduction vibrator, wherein the bone conduction vibrator is fixed on a vibrator support to form a vibrator support assembly;

[0016] A soft material component, wherein the soft material component connects the vibrator support assembly and the lower shell portion;

[0017] The acoustic impedance of the material of the outer or surrounding curved surface of the shell of the vibration chamber is [0.05,∞]*10 6 Rayleigh (kg / m 2 s) within the scope;

[0018] The vibrator support assembly is located in the upper shell part, and is directly or indirectly connected to the lower shell part through the upper shell part.

[0019] Specifically, the upper shell portion includes the bone conduction vibrator, the vibrator bracket and a portion of the outer shell of the vibration chamber, wherein the portion of the outer shell of the vibration chamber is selected from at least one of the following materials:

[0020] Hard materials, including hard plastics, metals, ceramics, glass, wood, plastic alloys, and composite materials, wherein the Young's modulus of the hard material is greater than 1 GPa; and / or

[0021] Soft materials include silicone, soft plastics, cloth, and leather, wherein the Young's modulus of the soft material is less than or equal to 10 MPa.

[0022] Specifically, the outer shell of the vibration transmission cabin of the upper shell part contains one or more holes, the shape of the holes is selected from circular, square or other regular or irregular shapes, the outer shell part of the vibration transmission cabin is a whole or a combination of several parts; the connection and fixation between the upper shell part and other parts is partial coverage or full coverage.

[0023] Specifically, the vibrator bracket is integrally formed with the vibration transmission cabin shell; or,

[0024] The vibrator bracket assembly is fixed to the upper shell part by one of the following methods: gluing, riveting, welding, snapping, ultrasonic welding, pressing, injection molding, thermoforming, screw locking or embedding.

[0025] Specifically, the soft material component is selected from at least one of the following materials: silicone, TPU material, soft plastic, soft rubber, wherein the Young's modulus of the soft material component is less than or equal to 10 MPa;

[0026] The soft material component is connected to the vibrator support assembly and the lower shell part by one of the following methods: chemical bonding, hot pressing bonding, ultrasonic connection, mechanical connection, slot fixing, screw fixing or adhesive connection.

[0027] Specifically, it also includes an elastic component or a soft material component filled around the vibrator bracket assembly, and the elastic component or the soft material component is selected from at least one of the following materials: sponge, foam, fiber, cotton, foam, soft glue, soft plastic, rubber, and textile.

[0028] Specifically, it also includes a stretchable elastic material or soft material arranged on the lower shell part, and the stretchable elastic material or soft material is selected from at least one of the following materials: silicone, rubber, elastic soft glue, spring, spring thimble;

[0029] The retractable elastic material or soft material is in contact with the bone conduction vibrator or has a gap therebetween, and is used to support, fix or protect the bone conduction vibrator.

[0030] Specifically, it also includes a hard touch panel, which is embedded in the soft material component and connected to the vibrator bracket assembly;

[0031] Wherein, the hard touch panel is connected to the vibrator bracket assembly by gluing or screwing, and the soft material component is provided with an elastic groove or a C-shaped groove.

[0032] A method for reducing sound leakage of a bone conduction vibrator in a product comprises the following steps:

[0033] Fixing the bone conduction vibrator on the vibrator bracket to form a vibrator bracket assembly;

[0034] Installing the vibrator bracket assembly on the upper shell of the vibration transmission cabin;

[0035] Connecting the vibrator bracket assembly and the lower shell of the vibration transmission cabin through a soft material component;

[0036] The shell material of the vibration chamber is selected so that the acoustic impedance of the curved surface facing the outside or the surroundings is in the range of [0.05,∞]*10 6 Rayleigh (kg / m 2 ·s) range.

[0037] Specifically, it also includes at least one of the following steps:

[0038] Filling elastic components or soft material components around the vibrator support assembly;

[0039] The lower shell portion is provided with a stretchable elastic material or a soft material;

[0040] Embedding the hard touch panel into the soft material component and connecting it to the vibrator support assembly;

[0041] One or more holes are provided on the outer shell of the vibration transmission cabin of the upper shell portion;

[0042] An elastic groove or a C-shaped groove is arranged on the soft material component.

[0043] Specifically, the bone conduction vibrator device of the present invention includes a vibration cabin, a bone conduction vibrator, a vibrator bracket and a soft material component. The vibration cabin is divided into an upper shell part and a lower shell part. The vibrator bracket assembly is located in the upper shell part and is connected to the lower shell part through a soft material component. This design not only ensures efficient conduction of vibration, but also effectively reduces sound leakage. In addition, the acoustic impedance of the vibration cabin shell material is strictly controlled within a specific range, further improving the sound insulation effect.

[0044] The beneficial effects of the present invention are mainly reflected in the following aspects:

[0045] 1. Significantly reduce sound leakage: Through the separated structure and soft connection, the path for vibration to propagate outward is effectively blocked, greatly reducing the problem of sound leakage.

[0046] 2. Improve conduction efficiency: The vibrator bracket assembly is located in the upper shell, ensuring that the vibration energy is mainly transmitted toward the human body, thereby improving the bone conduction effect.

[0047] 3. Improve wearing comfort: The use of soft materials reduces local pressure and improves the comfort of long-term wearing.

[0048] 4. Extend product life: The innovative fixing method and shock-absorbing structure effectively protect the bone conduction vibrator and extend the service life of the product.

[0049] 5. Improve acoustic performance: The selection of materials within a specific acoustic impedance range and the application of multiple noise reduction measures significantly improve the overall acoustic performance of the product.

[0050] 6. Strong adaptability: The design of multiple implementation modes enables the present invention to be flexibly applied to different types of bone conduction products.

[0051] In summary, the present invention provides a new solution for the application of bone conduction technology in the field of wearable devices, which is expected to promote the performance improvement and market expansion of bone conduction products and bring users a better auditory experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 is a schematic structural diagram of embodiment 1 of the present invention;

[0053] Figure 2 is a schematic structural diagram of Embodiment 2 of the present invention;

[0054] Figure 3 is a schematic structural diagram of Embodiment 3 of the present invention;

[0055] Figure 4 is a schematic structural diagram of embodiment 4 of the present invention;

[0056] Figure 5 is a schematic structural diagram of Embodiment 5 of the present invention;

[0057] Figure 6 is a schematic structural diagram of Embodiment 6 of the present invention;

[0058] Figure 7 is a schematic structural diagram of Embodiment 7 of the present invention;

[0059] Figure 8 is a schematic structural diagram of Embodiment 8 of the present invention;

[0060] Fig. 9 is a schematic structural diagram of Embodiment 9 of the present invention;

[0061] Fig.10 is a schematic structural diagram of embodiment 10 of the present invention;

[0062] Fig.11 is a schematic structural diagram of embodiment 11 of the present invention;

[0063] Fig.12 is a schematic structural diagram of Embodiment 12 of the present invention;

[0064] Fig.13 is a schematic structural diagram of Embodiment 13 of the present invention;

[0065] Fig.14 is a schematic structural diagram of Embodiment 14 of the present invention;

[0066] Fig.15 is a schematic structural diagram of Embodiment 15 of the present invention;

[0067] Fig.16 is a schematic structural diagram of Embodiment 16 of the present invention;

[0068] Fig.17 is a schematic structural diagram of Embodiment 17 of the present invention;

[0069] Fig.18 It is a functional relationship diagram of energy transmission coefficient and acoustic impedance ratio.

[0070] Fig.19 It is a schematic diagram written in the dB domain, with the horizontal axis being 20log(η) and the vertical axis being 20log(T). DETAILED DESCRIPTION

[0071] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics of one or more embodiments can be combined in any suitable form.

[0072] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0073] Please refer to Figure 18-19 Acoustic impedance is an important physical quantity that represents the acoustic characteristics of a medium. Acoustic impedance (Z) is equal to the product of the density (ρ) and the speed of sound (C) of the medium. Acoustic Z = ρ × C. When the unit of P is g / cm3, the unit of acoustic impedance is Rayleigh. The acoustic impedance of normal human tissue is shown in the table below.

[0074] Assuming that sound waves are transmitted from one medium to another, because the acoustic impedances of the two media are inconsistent, sound waves will be reflected at the interface between the media, that is, part of the sound waves are reflected back, and the other part of the sound waves are transmitted. The difference in the acoustic impedance of the two media is called impedance mismatch. And the greater the impedance mismatch, the greater the proportion of energy reflected back at the interface between the media. If the impedance matching is better, the greater the proportion of energy transmitted through the interface between the media.

[0075] Assuming that the acoustic impedance of medium 1 is Z1 and the acoustic impedance of medium 2 is Z2, the amplitude-based acoustic reflection coefficient R that occurs when the sound wave propagates from medium 1 to medium 2 is calculated by the following formula:

[0076]

[0077] The energy-based acoustic emission coefficient is calculated using the following formula:

[0078]

[0079] The amplitude-based acoustic transmission coefficient T is calculated using the following formula:

[0080]

[0081] It can also be seen from the above formula that the relationship between R and T is:

[0082] R+1=T

[0083] That is:

[0084] TR=1

[0085] In the above, the amplitude of R means that the reflected wave is inverted. The transmitted wave plus the reflected wave after the reverse phase equals the amplitude of the incident wave.

[0086] However, in practice, the amplitude of the reflected wave and the amplitude of the transmitted wave do not necessarily add up to 1, because the amplitude is not necessarily conserved when the sound wave passes through the interface of the medium. In contrast, because of the conservation of energy, the energy of the reflected wave plus the energy of the transmitted wave must be equal to the energy value of the incident wave. Based on this principle, the energy transfer coefficient can be simply calculated as follows:

[0087]

[0088] make

[0089]

[0090] The functional relationship between the energy transmission coefficient and the acoustic impedance ratio can be obtained as follows: Fig.15 As shown:

[0091] Written in dB domain, the horizontal axis is 20log(η) and the vertical axis is 20log(T), so we have Fig.16 .

[0092] For the earphone head of bone conduction earphones / bone conduction earphones, in order to reduce sound leakage, the curved surface (which can be a complex curved surface) where the earphone head contacts the air should try not to transmit the sound wave energy into the air, which would cause sound leakage. Therefore, for the curved surface where the earphone head contacts the air, which is the interface formed by the contact between the rear and surrounding materials of the earphone shell and the air, the transmission efficiency of the transmission of the sound wave energy should be as low as possible;

[0093] We can do a simple calculation to find out the acoustic impedance requirements for the curved material where the ear shell contacts the air, so that sound leakage can be minimized.

[0094] The data for air density and speed of sound are as follows:

[0095]

[0096] Assuming that the acoustic impedance of the curved material facing outward from the ear shell of the headphone and around is Zshell, let Because we want the sound wave energy to be transmitted as little as possible through the interface between the ear shell and the air, that is, the transmission efficiency of the sound wave energy transmission should be as low as possible. Generally, we hope that the energy attenuation at this interface is higher than 30db.

[0097]

[0098]

[0099]

[0100] As can be seen from the table above, the energy attenuation must exceed 30db, which means that the value range of η is:

[0101] η<0.008035261orη>124.4514612

[0102] Because the acoustic impedance of the ear shell as a solid material is definitely greater than that of air, the above formula only takes

[0103] η>124.4514612

[0104] Right now:

[0105]

[0106] Z shell >124.4514612*Z air

[0107] Zair =0.0004*10 6 Rayleigh (kg / m 2 ·s) is substituted into:

[0108] Z shell >124.4514612*0.0004*10 6

[0109] Z shell >0.04978058*10 6

[0110] make:

[0111] Z shell >0.05*10 6

[0112] The acoustic impedance of the material of the curved surface of the ear shell facing outward or around the earphone head is preferably between [0.05, ∞]*10 6 Rayleigh (kg / m 2 ·s).

[0113] The present invention relates to a device and method for reducing sound leakage of a bone conduction vibrator in a product. The present invention is further described in detail below in conjunction with specific implementation methods.

[0114] The present invention relates to a device and method for reducing sound leakage of a bone conduction vibrator in a product, and is particularly applicable to the field of digital products or communication equipment such as smart wearable devices, hearing aids, and smart glasses. With the widespread application of bone conduction technology, how to effectively reduce the sound leakage of bone conduction vibrators in products has become particularly important. The present invention effectively solves this technical problem through innovative structural design and material selection.

[0115] First of all, the core of the present invention is the unique vibration cabin structural design. The vibration cabin includes an upper shell part and a lower shell part. This separate structure lays the foundation for the directional propagation of vibration. The upper shell part is in contact with the human body, which is conducive to the efficient transmission of vibration into the human body; the lower shell part is connected to other parts, which can effectively reduce the outward propagation of vibration. This structural design cleverly solves the problem that the vibration of the traditional integrated shell is difficult to control.

[0116] Secondly, the present invention puts forward innovative requirements on material selection. The acoustic impedance of the curved surface material of the vibration chamber shell facing outward or around is strictly limited to [0.05,∞]*10 6 Rayleigh (kg / m 2·s). This requirement is based on acoustic principles and provides a scientific basis for reducing sound leakage by quantitatively analyzing the impact of materials on sound leakage. Preferably, in one embodiment of the present invention, the material of the upper shell part can be a hard material, such as hard plastic, metal, ceramic, etc., whose Young's modulus is greater than 1GPa; or a soft material, such as silicone, soft plastic, etc., whose Young's modulus is less than or equal to 10MPa. This material selection ensures both structural strength and acoustic performance.

[0117] Again, the present invention adopts an innovative vibrator fixing method. The bone conduction vibrator is fixed on the vibrator bracket to form a vibrator bracket assembly. This assembly is connected to the lower shell part through a soft material component. This design not only ensures the vibration conduction efficiency, but also achieves effective vibration isolation. Preferably, in one embodiment of the present invention, the soft material component can be made of silicone, TPU material, soft plastic or soft rubber, and its Young's modulus is less than or equal to 10MPa. This soft connection method can effectively reduce the propagation of vibration to the lower shell, thereby reducing sound leakage.

[0118] In addition, the present invention also proposes a combination of multiple noise reduction measures. For example, one or more holes are provided on the outer shell of the vibration chamber of the upper shell part, and these holes can be circular, square or other regular or irregular shapes. The outer shell part of the vibration chamber is a whole or a combination of several parts; the connection and fixation of the upper shell part with other parts is partial coverage or full coverage.

[0119] The upper shell 3 of the vibration transmission cabin is a structural component close to the skin and is used to transmit vibrations; the lower shell 4 of the vibration transmission cabin faces outwards.

[0120] Preferably, in one embodiment of the present invention, elastic components or soft material components such as sponge, foam, fiber, etc. can be filled around the vibrator support assembly 2. These measures can further block the vibration propagation path and improve the vibration isolation effect.

[0121] Finally, the present invention also introduces a sound transmission structure combining a hard touch panel and a soft material. The hard touch panel is embedded in the soft material component and connected to the vibrator bracket 2 assembly, and can be fixed by gluing or screwing. Preferably, in one embodiment of the present invention, an elastic groove or a C-shaped groove can also be provided on the soft material component. This design not only ensures the high-frequency conduction effect, but also provides good vibration isolation performance.

[0122] Below, we will describe the present invention in more detail with reference to specific embodiments:

[0123] Example 1 Silicone piece 5 + upper shell single-sided fixation

[0124] Please refer to Figure 1The bone conduction vibrator 1 is fixed between the upper shell 3 of the vibration cabin and the vibrator bracket 2. The bone conduction vibrator 1, the vibrator bracket 2 and the upper shell 3 of the vibration cabin constitute a combination; the upper shell 3 of the vibration cabin and the vibrator bracket 2 are integrally formed and have the characteristics of the vibrator bracket 2. The material of the upper shell 3 of the vibration cabin and the vibrator bracket 2 is preferably a material with a high Young's modulus, such as hard plastic, metal, ceramic, glass, wood, plastic alloy, composite material (glass fiber reinforced plastic, carbon fiber reinforced plastic, etc.), composite board (PC / PMMA), etc.

[0125] The upper shell 3 of the vibration chamber is connected and fixed to the front end of the silicone member 5, which can be partially covered or fully covered; the silicone member 5 is connected and fixed to the lower shell 4 of the vibration chamber by means of a rotating structure and glue at the rotating part; at the same time, the bone conduction vibrator 1 is also fixed to the upper shell 3 of the vibration chamber in a hard contact and tight fit manner. A buffer structure 6 is fixed to the bottom of the lower shell 4 of the vibration chamber, and the buffer structure 6 can be made of elastic materials such as foam and soft glue; the assembly and the lower shell 4 of the vibration chamber are not in direct contact, and there is a gap to avoid air, so as to prevent vibration from being directly transmitted to the shell and non-face parts, so as to effectively reduce the leakage of vibration to the outside world; the side of the bone conduction vibrator 1 is provided with an FPC air avoidance 7, which is used to set the lead to achieve conduction while avoiding interference with other components.

[0126] Embodiment 2 Silicone member 5 + upper shell fixed on both sides

[0127] Please refer to Figure 2 The bone conduction vibrator 1 is fixed between the two vibrator brackets 2, and the bone conduction vibrator 1 and the vibrator bracket 2 constitute a combination; the material of the upper shell 3 of the vibration cabin and the vibrator bracket 2 is preferably a material with a high Young's modulus, such as hard plastic, metal, ceramic, glass, wood, plastic alloy, composite material (glass fiber reinforced plastic, carbon fiber reinforced plastic, etc.), composite board (PC / PMMA), etc.

[0128] The upper shell 3 of the vibration cabin is connected and fixed to the front end of the silicone member 5; the upper shell 3 of the vibration cabin and the silicone member 5 fix the assembly therein in the manner of upper and lower clamping. The rear end of the silicone member 5 is connected and fixed to the lower shell 4 of the vibration cabin, and a buffer structure 6 is fixed to the bottom of the lower shell 4 of the vibration cabin. The buffer structure 6 can be made of elastic materials such as foam and soft rubber; the assembly and the lower shell 4 of the vibration cabin are not in direct contact, and there is a gap to avoid air, so as to prevent vibration from being directly transmitted to the outer shell and non-face parts, so as to effectively reduce the leakage of vibration to the outside. An FPC gap 7 is provided on the side of the bone conduction vibrator 1, which is used to set the lead to achieve conduction while avoiding interference with other components.

[0129] Embodiment 3: Vibrator bracket 2, upper shell integration + silicone parts 5 fixed on both sides

[0130] Please refer to Figure 3The bone conduction vibrator 1 is fixed between the upper shell 3 of the vibration cabin and the vibrator bracket 2. The bone conduction vibrator 1, the vibrator bracket 2 and the upper shell 3 of the vibration cabin constitute a combination; the upper shell 3 of the vibration cabin and the vibrator bracket 2 are integrally formed and have the characteristics of the vibrator bracket 2. The material of the upper shell 3 of the vibration cabin and the vibrator bracket 2 is preferably a material with a high Young's modulus, such as hard plastic, metal, ceramic, glass, wood, plastic alloy, composite material (glass fiber reinforced plastic, carbon fiber reinforced plastic, etc.), composite board (PC / PMMA), etc.

[0131] The upper shell 3 of the vibration cabin is connected and fixed to the front end of the silicone member 5; the upper shell 3 of the vibration cabin and the silicone member 5 fix the assembly therein in the manner of upper and lower clamping. The rear end of the silicone member 5 is connected and fixed to the lower shell 4 of the vibration cabin, and a buffer structure 6 is fixed to the bottom of the lower shell 4 of the vibration cabin. The buffer structure 6 can be made of elastic materials such as foam and soft rubber; the assembly and the lower shell 4 of the vibration cabin are not in direct contact, and there is a gap to avoid air, so as to prevent vibration from being directly transmitted to the outer shell and non-face parts, so as to effectively reduce the leakage of vibration to the outside. An FPC gap 7 is provided on the side of the bone conduction vibrator 1, which is used to set the lead to achieve conduction while avoiding interference with other components.

[0132] Example 4 Silicone member 5 (elastic groove) + touch panel (locking screw) fixed

[0133] Please refer to Figure 4 The bone conduction vibrator 1 is fixed between the upper shell 3 of the vibration cabin and the vibrator bracket 2. The bone conduction vibrator 1, the vibrator bracket 2 and the upper shell 3 of the vibration cabin constitute a combination; the upper shell 3 of the vibration cabin is integrally formed and has the characteristics of the vibrator bracket 2; the material of the upper shell 3 of the vibration cabin and the vibrator bracket 2 is preferably a material with a high Young's modulus, such as hard plastic, metal, ceramic, glass, wood, plastic alloy, composite material (glass fiber reinforced plastic, carbon fiber reinforced plastic, etc.), composite board (PC / PMMA), etc.

[0134] The bone conduction vibrator 1 and the vibrator bracket 2 assembly is directly connected and fastened to the touch panel by means of locking screws 8, and the touch panel 9 is embedded in the silicone member 5 and fixed by gluing; the silicone member 5 is fastened to the outer shell by gluing and locking screws, and an elastic groove is designed on the silicone member 5. The vibration between the touch panel 9 and the silicone member 5, and the silicone and the upper shell is difficult to be transmitted through the air at the elastic groove, which can effectively reduce vibration sound leakage.

[0135] Example 5 Silicone member 5 (elastic groove) + touch panel fixing

[0136] Please refer to Figure 5The bone conduction vibrator 1 is fixed on the vibrator bracket 2, and the bone conduction vibrator 1 and the vibrator bracket 2 constitute a combination; the material of the touch panel and the vibrator bracket 2 is preferably a material with a high Young's modulus, such as hard plastic, metal, ceramic, glass, wood, plastic alloy, composite material (glass fiber reinforced plastic, carbon fiber reinforced plastic, etc.), composite board (PC / PMMA), etc.

[0137] The bone conduction vibrator 1 and the vibrator bracket 2 assembly is directly connected and fastened to the touch panel by gluing, and the touch panel is embedded in the silicone member 5 and fixed by gluing; the silicone member 5 is glued and fastened to the outer shell, and an elastic groove is designed on the silicone member 5. The vibration between the touch panel 9 and the silicone member 5, and the silicone and the upper shell is difficult to be transmitted through the air at the elastic groove, which can effectively reduce vibration sound leakage.

[0138] Example 6 The front end of the silicone member 5 is fixed

[0139] Please refer to Figure 6 The bone conduction vibrator 1 is fixed between the upper shell 3 of the vibration cabin and the vibrator bracket 2. The bone conduction vibrator 1, the vibrator bracket 2 and the upper shell 3 of the vibration cabin constitute a combination; the upper shell 3 of the vibration cabin is integrally formed and has the characteristics of the vibrator bracket 2; the material of the upper shell 3 of the vibration cabin and the vibrator bracket 2 is preferably a material with a high Young's modulus, such as hard plastic, metal, ceramic, glass, wood, plastic alloy, composite material (glass fiber reinforced plastic, carbon fiber reinforced plastic, etc.), composite board (PC / PMMA), etc.

[0140] The silicone piece 5 is used as a shock-absorbing material and is placed at the front end of the hearing aid vibration chamber. The vibration is only transmitted through the upper shell 3 of the vibration chamber facing the face, reducing the sound leakage from the lower shell 4 and the side walls of the vibration chamber to the outside.

[0141] Example 7 Silicone member 5 middle section fixed

[0142] Please refer to Figure 7 The bone conduction vibrator 1 is fixed on the vibrator bracket 2. The bone conduction vibrator 1 and the vibrator bracket 2 form a combination, which is directly fixed on the hard shell of the vibration cabin. The silicone member 5 is used as a shock-absorbing structural member, which centrally connects and fixes the upper shell 3 and the lower shell 4 of the vibration cabin. The vibration is only transmitted through the upper shell 3 of the vibration cabin, which reduces the sound leakage of the lower shell 4 of the vibration cabin to the outside.

[0143] Embodiment 8 Silicone member 5 + touch panel 9 fixed

[0144] Please refer to Figure 8 The bone conduction vibrator 1 is fixed on the vibrator bracket 2. The bone conduction vibrator 1 and the vibrator bracket 2 constitute a combination. The material of the vibrator bracket 2 is preferably a material with a high Young's modulus, such as hard plastic, metal, ceramic, glass, wood, plastic alloy, composite material (glass fiber reinforced plastic, carbon fiber reinforced plastic, etc.), composite board (PC / PMMA), etc.

[0145] The bone conduction vibrator 1 and the vibrator bracket 2 assembly are directly connected and fastened to the touch panel by gluing, and the touch panel is embedded in the silicone member 5 and fixed by gluing; the silicone member 5 is fastened to the outer shell by gluing or screwing, and a C-shaped groove is designed under the silicone member 5 to provide certain supporting conditions for the bone conduction vibrator 1 vibrator bracket 2 assembly; the hard touch panel 9 can ensure the conduction of high frequencies, and at the same time, the silicone member 5 serves as a shock-absorbing material to effectively avoid direct contact between the bone conduction vibrator 1, the vibrator bracket 2 and the upper shell 3 and the lower shell 4 of the vibration cabin, prevent collisions and scratches, and effectively reduce the sound leakage problem of the vibration cabin, thereby ensuring the consistency of vibration conduction.

[0146] Example 9 Silicone member 5 fixed

[0147] Please refer to Fig. 9 The bone conduction vibrator 1 is fixed on the vibrator bracket 2. The bone conduction vibrator 1 and the vibrator bracket 2 constitute a combination. The material of the vibrator bracket 2 is preferably a material with a high Young's modulus, such as hard plastic, metal, ceramic, glass, wood, plastic alloy, composite material (glass fiber reinforced plastic, carbon fiber reinforced plastic, etc.), composite board (PC / PMMA), etc.

[0148] The assembly is fixed on the silicone piece 5, and the silicone piece 5 is fixed on the upper shell 3 of the vibration cabin; a C-shaped groove is designed on the soft rubber piece to fasten the bone conduction vibrator 1 vibrator bracket 2 assembly, so that the bone conduction vibrator 1 vibrator bracket 2 can be fixed to the upper shell 3 and the lower shell 4 of the vibration cabin by fixing with the silicone piece 5.

[0149] Embodiment 10: Vibration cabin upper shell 3 (soft silicone) fixed + hole design

[0150] Please refer to Fig.10 , the bone conduction vibrator 1 is fixed on the vibrator bracket 2, the bone conduction vibrator 1 and the vibrator bracket 2 form a combination, the material of the vibrator bracket 2 is preferably a material with a high Young's modulus, such as hard plastic, metal, ceramic, glass, wood, plastic alloy, composite material (glass fiber reinforced plastic, carbon fiber reinforced plastic, etc.), composite board (PC / PMMA), etc. A buffer structure 6 is fixed to the bottom of the lower shell 4 of the vibration cabin, and the buffer structure 6 can be made of elastic materials such as foam and soft rubber;

[0151] The assembly is fixed on the upper shell 3 (soft rubber) of the vibration chamber; the upper shell 3 of the vibration chamber is directly fixed to the lower shell 4 of the vibration chamber, and the upper shell 3 of the vibration chamber is designed with openings 10 around it, so that vibration is difficult to be conducted through the air at the openings 10, which can effectively reduce vibration leakage. The side of the bone conduction vibrator 1 is provided with an FPC airtightness 7 for setting the lead wire to achieve conduction while avoiding interference with other components.

[0152] Example 11 Silicone part 5 + foam fixation + hole design

[0153] Please refer to Fig.11 The bone conduction vibrator 1 is fixed on the vibrator bracket 2. The bone conduction vibrator 1 and the vibrator bracket 2 form a combination. The materials of the upper shell 3 of the vibration cabin and the vibrator bracket 2 are preferably materials with high Young's modulus. The combination is connected to the upper shell 3 of the vibration cabin through the silicone member 5. The buffer structure 6 is filled between the lower shell 4 of the vibration cabin and the bone conduction vibrator 1. The buffer structure 6 is foam to prevent the bone conduction vibrator 1 from radially moving and colliding or scratching the shell of the vibration cabin. The soft silicone is designed with an opening 10, so that vibration is not easily transmitted through the air at the opening, reducing sound leakage.

[0154] Example 12 Silicone part 5 + foam + Pogo pin fixation

[0155] Please refer to Fig.12 , the bone conduction vibrator 1 is fixed on the vibrator bracket 2, the bone conduction vibrator 1 and the vibrator bracket 2 form a combination, and the material of the vibrator bracket 2 is preferably a material with a high Young's modulus. The bone conduction vibrator 1 and the vibrator bracket 2 combination is connected to the upper shell 3 of the vibration cabin through the silicone member 5, and the buffer structure 6 is filled between the lower shell 4 of the vibration cabin and the bone conduction vibrator 1. The buffer structure 6 is foam, and a Pogo pin 11 is installed under the bone conduction vibrator 1. The foam can prevent the bone conduction vibrator 1 from moving radially, and the Pogo pin 11 can prevent the bone conduction vibrator 1 from moving axially; the synergistic effect of the foam and the Pogo pin 11 can better ensure the stability of the vibration of the bone conduction vibrator 1.

[0156] Example 13 Silicone part 5 + foam + bottom glue fixation

[0157] Please refer to Fig.13 , the bone conduction vibrator 1 is fixed on the vibrator bracket 2, and the bone conduction vibrator 1 and the vibrator bracket 2 form a combination. The material of the vibrator bracket 2 is preferably a material with a high Young's modulus. The bone conduction vibrator 1 and the vibrator bracket 2 combination are connected to the upper shell 3 of the vibration cabin through the silicone member 5. The lower shell 4 of the vibration cabin and the bone conduction vibrator 1 are filled with a buffer structure 6, and the buffer structure 6 is foam. Soft glue is added under the bone conduction vibrator 1. The foam can prevent the bone conduction vibrator 1 from moving radially, and the soft glue can provide support for the fixation of the bone conduction vibrator 1; the synergistic effect of the foam and the soft glue can better prevent the bone conduction vibrator 1 and the vibrator bracket 2 from contacting, colliding, and scratching with the shell, thereby reducing sound leakage.

[0158] Example 14 Vibrator bracket 2, upper shell integration + foam fixation + Pogo pin fixation

[0159] Please refer to Fig.14The bone conduction vibrator 1 is fixed on the upper shell 3 of the vibration cabin. The upper shell 3 of the vibration cabin and the vibrator bracket 2 are integrally formed and have the characteristics of the vibrator bracket 2. The upper shell 3 of the vibration cabin is preferably made of a material with a high Young's modulus, such as hard plastic, metal, ceramic, glass, wood, plastic alloy, composite material (glass fiber reinforced plastic, carbon fiber reinforced plastic, etc.), composite board (PC / PMMA), etc.

[0160] A silicone component 5 is provided on the upper shell 3 of the vibration cabin, and a buffer structure component 6 is filled between the lower shell 4 of the vibration cabin and the bone conduction vibrator 1. The buffer structure component 6 is foam, and a Pogo-pin 11 at the bottom is added as a buffer component. While achieving better fixation of the bone conduction vibrator 1, it also effectively prevents collision and scratching between the bone conduction vibrator 1, the vibrator bracket 2 and the shell, thereby reducing sound leakage.

[0161] Example 15 Silicone member 5 (punching) + touch panel (gluing) fixed

[0162] Please refer to Fig.15 The vibration cabin includes a vibration cabin upper shell 3 and a vibration cabin upper shell 4; the bone conduction vibrator 1 is fixed on the vibrator bracket 2, and the bone conduction vibrator 1 and the vibrator bracket 2 constitute a combination. The material of the touch panel and the vibrator bracket 2 is preferably a material with a high Young's modulus, such as hard plastic, metal, ceramic, glass, wood, plastic alloy, composite material (glass fiber reinforced plastic, carbon fiber reinforced plastic, etc.), composite board (PC / PMMA), etc.

[0163] The bone conduction vibrator 1 and the vibrator bracket 2 assembly is directly connected and fastened to the touch panel 9 by gluing, and the touch panel 9 is embedded in the silicone member 5 and fixed by gluing; the silicone member 5 is fastened to the upper shell 3 of the vibration cabin by gluing or screwing, and a C-shaped groove is designed under the silicone member 5 to provide certain supporting conditions for the bone conduction vibrator 1 vibrator bracket 2 assembly; at the same time, a groove 11 is designed on the silicone member 5, and the vibration between the touch panel 9 and the silicone member 5, and the silicone and the upper shell 3 of the vibration cabin is difficult to be transmitted through the air at the groove 11, which can effectively reduce vibration sound leakage.

[0164] Example 16 Silicone member 5 fixed on both sides

[0165] Please refer to Fig.16 The bone conduction vibrator 1 is fixed between the two vibrator brackets 2, and the bone conduction vibrator 1 and the vibrator bracket 2 constitute a combination; the material of the vibrator bracket 2 is preferably a material with a high Young's modulus, such as hard plastic, metal, ceramic, glass, wood, plastic alloy, composite material (glass fiber reinforced plastic, carbon fiber reinforced plastic, etc.), composite board (PC / PMMA), etc.

[0166] The upper shell 3 of the vibration cabin is a silicone piece; the silicone pieces on both sides fix the assembly therein in a clamping manner. The upper shell 3 of the vibration cabin and the lower shell 4 of the vibration cabin are connected and fixed to each other, and a buffer structure 6 is fixed to the bottom of the lower shell 4 of the vibration cabin. The buffer structure 6 can be made of foam, soft rubber and other materials; the assembly and the lower shell 4 of the vibration cabin are not in direct contact, which can effectively reduce the leakage of vibration to the lower shell and its outside. An FPC airtightness 7 is provided on the side of the bone conduction vibrator 1 for setting the lead to achieve conduction while avoiding interference with other components.

[0167] Example 17 Upper shell single-sided fixed + rotating structure design

[0168] Please refer to Fig.17 The bone conduction vibrator 1 is fixed between the upper shell 3 of the vibration cabin and the vibrator bracket 2. The bone conduction vibrator 1, the vibrator bracket 2 and the upper shell 3 of the vibration cabin constitute a combination; the upper shell 3 of the vibration cabin is integrally formed and has the characteristics of the vibrator bracket 2. The material of the upper shell 3 of the vibration cabin and the vibrator bracket 2 is preferably a material with a high Young's modulus, such as hard plastic, metal, ceramic, glass, wood, plastic alloy, composite material (glass fiber reinforced plastic, carbon fiber reinforced plastic, etc.), composite board (PC / PMMA), etc.

[0169] The upper shell 3 of the vibration cabin is connected and fixed to the lower shell 4 of the vibration cabin by means of a rotating structure and glue at the rotating part; at the same time, the bone conduction vibrator 1 and the vibrator bracket 2 combination is also fixed to the upper shell 3 of the vibration cabin in a hard contact and tight fit manner. A buffer structure 6 is fixed to the bottom of the lower shell 4 of the vibration cabin, and the buffer structure 6 can be made of elastic materials such as foam and soft glue; there is no direct contact between the combination and the lower shell 4 of the vibration cabin, and there is a gap to avoid air, so as to prevent vibration from being directly transmitted to the outer shell and non-face parts, so as to effectively reduce the leakage of vibration to the outside. An FPC gap 7 is provided on the side of the bone conduction vibrator 1, which is used to set the lead to achieve conduction while avoiding interference with other components.

[0170] Finally, it should be emphasized that the core of the present invention is to achieve efficient sound transmission and low sound leakage of the bone conduction vibrator 1 in the product through a multi-level and multi-angle noise reduction design. This systematic solution has opened up a new path for the further development and application of bone conduction technology. With the continuous expansion of the wearable device market, the present invention is expected to be widely used in smart headphones, hearing aids, smart glasses and other fields, bringing users a better auditory experience.

[0171] It should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for reducing sound leakage of a bone conduction vibrator in a product, characterized in that ,include: A vibration transmission cabin, the vibration transmission cabin comprising an upper shell portion and a lower shell portion; A bone conduction vibrator, wherein the bone conduction vibrator is fixed on a vibrator support to form a vibrator support assembly; A soft material component, wherein the soft material component connects the vibrator support assembly and the lower shell portion; The acoustic impedance of the material of the outer or surrounding curved surface of the shell of the vibration chamber is [0.05,∞]*10 6 Rayleigh (kg / m 2 s) within the scope; The vibrator support assembly is located in the upper shell part, and is directly or indirectly connected to the lower shell part through the upper shell part.

2. The device according to claim 1, characterized in that The upper shell portion includes the bone conduction vibrator, the vibrator bracket and a portion of the outer shell of the vibration chamber, wherein the portion of the outer shell of the vibration chamber is selected from at least one of the following materials: Hard materials, including hard plastics, metals, ceramics, glass, wood, plastic alloys, and composite materials, wherein the Young's modulus of the hard material is greater than 1 GPa; and / or Soft materials include silicone, soft plastics, cloth, and leather, wherein the Young's modulus of the soft material is less than or equal to 10 MPa.

3. The device according to claim 1 or 2, characterized in that The outer shell of the vibration cabin of the upper shell part contains one or more holes, and the shape of the holes is selected from circular, square or other regular or irregular shapes. The outer shell part of the vibration cabin is a whole or a combination of several parts; the connection and fixation between the upper shell part and other parts is partial coverage or full coverage.

4. The device according to claim 1, characterized in that , the vibrator bracket is integrally formed with the vibration transmission cabin shell; or, The vibrator bracket assembly is fixed to the upper shell part by one of the following methods: gluing, riveting, welding, snapping, ultrasonic welding, pressing, injection molding, thermoforming, screw locking or embedding.

5. The device according to claim 1, characterized in that , the soft material component is selected from at least one of the following materials: silicone, TPU material, soft plastic, soft rubber, wherein the Young's modulus of the soft material component is less than or equal to 10MPa; The soft material component is connected to the vibrator support assembly and the lower shell part by one of the following methods: chemical bonding, hot pressing bonding, ultrasonic connection, mechanical connection, slot fixing, screw fixing or adhesive connection.

6. The device according to claim 1, characterized in that , also includes an elastic component or a soft material component filled around the vibrator support assembly, and the elastic component or the soft material component is selected from at least one of the following materials: sponge, foam, fiber, cotton, foam, soft glue, soft plastic, rubber, and textile.

7. The device according to claim 1, characterized in that , further comprising a stretchable elastic material or soft material arranged on the lower shell part, wherein the stretchable elastic material or soft material is selected from at least one of the following materials: silicone, rubber, elastic soft glue, spring, spring ejector pin; The retractable elastic material or soft material is in contact with the bone conduction vibrator or has a gap therebetween, and is used to support, fix or protect the bone conduction vibrator.

8. The device according to claim 1, characterized in that , further comprising a hard touch panel, wherein the hard touch panel is embedded in the soft material component and connected to the vibrator support assembly; Wherein, the hard touch panel is connected to the vibrator bracket assembly by gluing or screwing, and the soft material component is provided with an elastic groove or a C-shaped groove.

9. A method for reducing sound leakage of a bone conduction vibrator in a product, characterized in that , including the following steps: Fixing the bone conduction vibrator on the vibrator bracket to form a vibrator bracket assembly; Installing the vibrator bracket assembly on the upper shell of the vibration transmission cabin; Connecting the vibrator bracket assembly and the lower shell of the vibration transmission cabin through a soft material component; The shell material of the vibration chamber is selected so that the acoustic impedance of the curved surface facing the outside or the surroundings is in the range of [0.05,∞]*10 6 Rayleigh (kg / m 2 ·s) range.

10. The method according to claim 9, characterized in that , further comprising at least one of the following steps: Filling elastic components or soft material components around the vibrator support assembly; The lower shell portion is provided with a stretchable elastic material or a soft material; Embedding the hard touch panel into the soft material component and connecting it to the vibrator support assembly; One or more holes are provided on the outer shell of the vibration transmission cabin of the upper shell portion; An elastic groove or a C-shaped groove is arranged on the soft material component.

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