Method and device for fixing bone conduction vibrator in product

Abstract

The invention relates to the technical field of fixing methods and fixing devices of bone conduction oscillators, in particular to a fixing method and fixing device of a bone conduction oscillator in a product, which comprises the following steps of: obtaining a bracket which is provided with at least one bearing surface; a vibration clearance space is arranged on the bracket, and the vibration clearance space is positioned in the vibration direction of the bone conduction vibrator; fixing the bone conduction vibrator on the bracket, so that at least one part of the bone conduction vibrator is in contact with the at least one supporting surface; wherein the bracket adopts a mode that at least one supporting surface is in direct contact with the vibrator, so that the conduction efficiency of vibration is greatly improved, especially the performance at a high frequency band; unnecessary contact and impact between the vibrator and the support are effectively reduced through the arranged vibration receding space, so that audio nonlinear distortion caused by contact and impact is avoided; the stent can be independent and can also be a part of a product structure, so that the method can be suitable for various different types of bone conduction products.

Description

Technical Field

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

[0002] With the continuous development of acoustic technology, bone conduction technology, as an innovative way of sound wave transmission, has been widely used and paid attention to in recent years. Bone conduction technology converts electrical signals into mechanical vibrations and transmits them to the inner ear through the skull, ultimately achieving sound wave conduction and clear auditory perception. This technology does not rely on the eardrum, so it can provide users with a good auditory experience even in noisy environments.

[0003] Bone conduction technology has been applied in many fields, such as headphones, hearing aids, smart glasses and other digital products and communication equipment. In these applications, bone conduction transducers (BCT) are core components, and their fixing methods and devices have a decisive impact on the performance of the products.

[0004] The current status of existing technology development is as follows:

[0005] 1. Embedded fixation: The bone conduction vibrator is directly embedded into the structure or shell of the product.

[0006] 2. Buckle fixing: fix the vibrator inside the product with buckles.

[0007] 3. Elastic material wrapping: Use elastic material to wrap the vibrator and fix it in the product.

[0008] 4. Screw fixing: The vibrator is directly fixed to the product structure by screws.

[0009] However, these prior arts have the following problems in practical applications:

[0010] 1. Low vibration transmission efficiency: Existing fixing methods often cannot ensure close contact between the vibrator and the product structure, resulting in vibration energy loss. Lack of effective transmission of high-frequency vibration affects the sound quality, especially in the high-frequency range.

[0011] 2. Uneven stress distribution: methods such as snap-on fixing can easily cause local stress concentration, increasing the risk of vibrator damage. Uneven stress distribution may cause the performance of the vibrator to decline, affecting the uniformity and stability of the sound.

[0012] 3. Short service life: Due to improper fixation, it is easy to loosen or fall off after long-term use. Stress concentration may cause fatigue damage to the vibrator or fixed structure, shortening the product life.

[0013] 4. Difficulties in production and maintenance: Some fixing methods require complex structural designs, which increase production difficulty and cost. Repairing and replacing the vibrator is complicated and requires professional tools and technicians.

[0014] 5. Poor wearing comfort: To ensure good contact, existing methods often require greater pressure, which affects the user's wearing comfort. The fixed structure may increase the overall volume of the product, affecting the appearance and portability.

[0015] 6. Lack of adaptability: Existing fixing methods are often designed for specific products and are difficult to be used in different types of products. They lack the ability to adapt to different usage environments (such as waterproofing and dustproofing).

[0016] 7. Sound leakage: Some fixing methods cannot effectively isolate vibrations, causing sound to leak outward, affecting user experience and privacy.

[0017] 8. Poor frequency response: The existing fixing method is difficult to take into account the conduction effects of low and high frequencies, resulting in insufficient sound restoration in the full frequency band.

[0018] 9. Weak anti-interference ability: Improper fixation may cause the oscillator to be disturbed by external vibrations, affecting the clarity and stability of the sound.

[0019] 10. Difficulty in cost control: Some fixing methods require the use of special materials or complex processes, which increases product costs.

[0020] In view of the above problems, there is an urgent need for a new bone conduction vibrator fixing method and device to improve vibration conduction efficiency, extend service life, simplify production and maintenance processes, improve wearing comfort, and have good adaptability and cost-effectiveness. Summary of the invention

[0021] The present invention is aimed at the above-mentioned technical problem, and the purpose of the present invention is to provide a method and a device for fixing a bone conduction vibrator in a product.

[0022] To achieve the above object, the present invention provides the following technical solution: a method for fixing a bone conduction vibrator in a product, comprising the following steps:

[0023] The following steps are involved:

[0024] Obtaining a support having at least one supporting surface;

[0025] A vibration avoidance space is provided on the support, and the vibration avoidance space is located in the vibration direction of the bone conduction vibrator;

[0026] The bone conduction vibrator is fixed to the support so that at least a portion of the bone conduction vibrator contacts the at least one supporting surface.

[0027] The bone conduction vibrator and the bracket are installed in the vibration chamber, and the acoustic impedance of the material of the curved surface of the vibration chamber facing the outside or the surroundings is preferably in the range of [0.05, ∞]*10 6 Rayleigh (kg / m 2 ·s), so that when the sound waves propagate from the product housing into the air, the sound wave attenuation at the interface between the earphone and the air is relatively large, resulting in less sound leakage.

[0028] Wherein, the bracket is supported by a material with a high Young's modulus, such as a material greater than 1 GPa. The material with a high Young's modulus makes the vibration transmission attenuation for medium and high frequency vibrations smaller.

[0029] Specifically, the vibration avoidance space has a stepped, sloped or arched shape.

[0030] Specifically, the step of fixing the bone conduction vibrator on the bracket includes:

[0031] Applying high viscosity glue between the bone conduction vibrator and the bracket; or

[0032] The bone conduction vibrator is fixed on the bracket by welding, extrusion riveting or locking screws.

[0033] Specifically, it further includes:

[0034] Fix the bracket inside the product vibration chamber; or

[0035] The bracket is formed as a part of the internal structure of the product vibration transmission chamber, the product end cover or the product side wall.

[0036] The acoustic impedance of the material of the curved surface of the vibration chamber facing outward or around is preferably in the range of [0.05, ∞]*10 6 Rayleigh (kg / m 2 s) materials.

[0037] Materials that meet the above conditions, such as metals, or materials with relatively high Young's modulus, such as nylon + glass fiber, PC + glass fiber, or ABS, or PC, etc.

[0038] Specifically, the at least one supporting surface includes two or more supporting surfaces, and the step of fixing the bone conduction vibrator on the bracket includes:

[0039] The bone conduction vibrator is brought into contact with the two or more supporting surfaces.

[0040] A fixing device for a bone conduction vibrator in a product, comprising:

[0041] A support having at least one supporting surface;

[0042] A vibration avoidance space is provided on the support and is located in the vibration direction of the bone conduction vibrator;

[0043] a fixing structure for fixing the bone conduction vibrator on the bracket so that at least a portion of the bone conduction vibrator contacts the at least one supporting surface;

[0044] Wherein, the bracket is made of a material with a Young's modulus greater than 1 GPa.

[0045] Specifically, the vibration avoidance space has a stepped, sloped or arched shape.

[0046] Specifically, the fixing structure includes:

[0047] Highly adhesive glue, used to bond the bone conduction vibrator and the bracket; or

[0048] A welding structure, an extrusion riveting structure or a locking screw structure is used to fix the bone conduction vibrator on the bracket.

[0049] The bracket is configured as:

[0050] Fixed inside the product vibration chamber; or

[0051] The acoustic impedance of the material of the curved surface facing the outside or the surroundings, which is formed as part of the internal structure of the product vibration chamber, the product end cover or the product side wall, is preferably in the range of [0.05, ∞]*10 6 Rayleigh (kg / m 2 s) materials.

[0052] Specifically, the at least one supporting surface includes two or more supporting surfaces, and the fixing structure is configured as follows:

[0053] The bone conduction vibrator is brought into contact with the two or more supporting surfaces.

[0054] The bone conduction vibrator fixing method provided by the present invention has the following beneficial effects:

[0055] 1. Improve vibration conduction efficiency: By using a bracket made of a high Young's modulus material and adopting a method in which at least one supporting surface is in direct contact with the vibrator, the vibration conduction efficiency is greatly improved, especially in the high frequency band.

[0056] 2. Extend service life: The vibration avoidance space set up effectively reduces unnecessary contact between the vibrator and the bracket, reduces stress concentration, and thus extends the service life of the product.

[0057] 3. Strong adaptability: The bracket can be independent or part of the product structure. This flexible design makes this method applicable to various types of bone conduction products.

[0058] 4. Easy production and maintenance: Compared with traditional snap-on or embedded fixation, this method simplifies the production process and is also convenient for later maintenance and vibrator replacement.

[0059] 5. Adjustable performance: By adjusting the bracket material, vibration avoidance space shape and fixing method, the sound performance can be optimized according to the needs of different products.

[0060] The bone conduction vibrator fixing device provided by the present invention has the following beneficial effects:

[0061] 1. Structural optimization: The combined design of the bracket, vibration avoidance space and fixed structure not only ensures the effective conduction of vibration, but also avoids unnecessary energy loss.

[0062] 2. Uniform stress distribution: Through the reasonable design of the supporting surface and vibration avoidance space, a more uniform stress distribution is achieved, reducing the risk of vibrator damage.

[0063] 3. Good sound insulation effect: The design of the vibration avoidance space not only provides space for the vibrator to move, but also plays a role in sound insulation to a certain extent, reducing sound leakage. The set vibration avoidance space effectively reduces unnecessary contact and impact between the vibrator and the bracket, so that there will be no audio nonlinear distortion caused by contact and impact. 4. Strong compatibility: The modular design of the device makes it easy to integrate with various product structures, improving the flexibility of product development.

[0064] 5. High cost-effectiveness: The use of high-performance materials and optimized structural design effectively controls production costs while improving performance.

[0065] In summary, the bone conduction vibrator fixing method and device of the present invention well solve the problems existing in the prior art and provide new possibilities for the further development and application of bone conduction technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 It is a schematic diagram of the structure of the sloped single bearing surface fixation of the present invention;

[0067] Figure 2 A schematic diagram of the structure of the arched double bearing surface fixation of the present invention;

[0068] Figure 3 It is a schematic diagram of the structure of the step-type multi-support surface fixation of the present invention;

[0069] Figure 4 It is a schematic diagram of the structure of a single bracket fixed by welding of the present invention;

[0070] Figure 5 It is a schematic diagram of the structure of the double-sided bracket of the present invention being welded and fixed;

[0071] Figure 6 It is a schematic diagram of the structure of the press riveting fixation of the present invention;

[0072] Figure 7 It is a schematic diagram of the structure of the screw spring fixing of the present invention;

[0073] Figure 8 It is a schematic diagram of the structure of the screw outer cylinder fixing of the present invention;

[0074] Fig. 9 It is a schematic diagram of the structure of the screw bracket fixation of the present invention;

[0075] Fig.10 It is a schematic diagram of the structure of fixing the integrated housing bracket of the present invention;

[0076] Fig.11 It is a schematic diagram of the structure of a single bracket fixed with glue according to the present invention;

[0077] Fig.12 This is a state diagram of a single bracket fixing a vibrator in a product of the present invention;

[0078] Fig.13 It is a schematic diagram of the structure of the double brackets fixed with glue of the present invention;

[0079] Fig.14 This is a state diagram of the double-bracket fixed vibrator in the product of the present invention.

[0080] Fig.15 It is a functional relationship diagram of energy transmission coefficient and acoustic impedance ratio.

[0081] Fig.16 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

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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:

[0087]

[0088] The energy-based acoustic emission coefficient is calculated using the following formula:

[0089]

[0090] The amplitude-based acoustic transmission coefficient T is calculated using the following formula:

[0091]

[0092] It can also be seen from the above formula that the relationship between R and T is:

[0093] R+1=T

[0094] That is:

[0095] TR=1

[0096] 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.

[0097] 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:

[0098]

[0099] make

[0100]

[0101] The functional relationship between the energy transmission coefficient and the acoustic impedance ratio can be obtained as follows: Fig.15 As shown:

[0102] Written in dB domain, the horizontal axis is 20log(η) and the vertical axis is 20log(T), so we have Fig.16 .

[0103] 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;

[0104] 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.

[0105] The data for air density and speed of sound are as follows:

[0106]

[0107] 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.

[0108]

[0109]

[0110]

[0111] As can be seen from the table above, the energy attenuation must exceed 30db, which means that the value range of η is:

[0112] η<0.008035261orη>124.4514612

[0113] Because the acoustic impedance of the ear shell as a solid material is definitely greater than that of air, the above formula only takes

[0114] η>124.4514612

[0115] Right now:

[0116]

[0117] Z shell >124.4514612*Z air

[0118] Z air =0.0004*10 6 Rayleigh (kg / m 2 ·s) is substituted into:

[0119] Z shell >124.4514612*0.0004*10 6

[0120] Z shell >0.04978058*10 6

[0121] make:

[0122] Z shell >0.05*10 6

[0123] 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).

[0124] The present invention relates to a method and device for fixing a bone conduction vibrator in a product. The present invention is further described in detail below in conjunction with specific implementations.

[0125] Example 1

[0126] Please refer to Figure 1-14 The present invention provides a method for fixing a bone conduction vibrator in a product, comprising the following steps:

[0127] Step 1: Get a bracket 1

[0128] First, a bracket 1 is obtained, and the bracket 1 has at least one supporting surface 4. The bracket 1 can be an independent structure, or it can be a part of the internal structure of the product, the end cover of the product, or the side wall of the product. The material selection of the bracket 1 is very important. The bracket 1 used in the present invention is made of a material with a Young's modulus greater than 1GPa, for example, PC+glass fiber, nylon+glass fiber, ABS+glass fiber and other composite materials can be selected. Such a high Young's modulus material can ensure that the bracket 1 has sufficient rigidity, which is conducive to the conduction of high-frequency vibrations.

[0129] Step 2: Set up a vibration-proof space 2

[0130] A vibration avoidance space 2 is provided on the support 1, and the vibration avoidance space 2 is located in the vibration direction of the bone conduction vibrator 3. The design of the vibration avoidance space 2 is a key innovation of the present invention, which allows the bone conduction vibrator 3 to have enough space when vibrating to avoid hard contact with the support 1, thereby extending the service life of the bone conduction vibrator 3. According to different product requirements and space limitations, the shape of the vibration avoidance space 2 can be designed to be stepped, sloped or arched.

[0131] Step type: A sudden height change is designed inside the bracket 1 to form a step. This design is simple and direct and easy to process.

[0132] Slope type: The height inside the bracket 1 gradually changes to form a slope. This design can guide vibration more smoothly.

[0133] Arched: The interior of the bracket 1 is arched and concave, providing a larger air avoidance area. This design can maximize the air avoidance volume within a limited space.

[0134] Step 3: Fix the bone conduction vibrator 3

[0135] The bone conduction vibrator 3 is fixed on the bracket 1 so that at least a part of the bone conduction vibrator 3 is in contact with at least one supporting surface 4. The choice of fixing method directly affects the vibration conduction effect and the reliability of the product. The present invention provides a variety of fixing methods:

[0136] a) Use high-adhesive glue 11: Apply high-adhesive glue 11 between the bone conduction vibrator 3 and the bracket 1. The selected high-adhesive glue 11 should have the characteristics of high Young's modulus, strong viscosity, high temperature resistance and aging resistance. It is recommended to select high-performance glue with bonding strength>5MPa and temperature resistance>80℃. The use of high-adhesive glue 11 not only provides strong fixation, but also ensures the conduction of high-frequency vibration.

[0137] b) Welding: The bone conduction vibrator 3 is fixed to the bracket 1 by welding. The welding points 5 can be set at the end surfaces of the bone conduction vibrator 3 and the bracket 1 to ensure a stable connection.

[0138] c) Extrusion riveting: Use a special tool to extrude and rivet the bone conduction vibrator 3 and the bracket 1. This method is suitable for mass production. The rivet 7 plays a role in this process.

[0139] d) Screw locking: The bone conduction vibrator 3 is fixed to the bracket 1 by screws 8. This method is convenient for later maintenance and replacement of the bone conduction vibrator 3.

[0140] During the fixation process, special attention should be paid to the following points:

[0141] Ensure that the bone conduction vibrator 3 is in close contact with the supporting surface 4 to avoid any gap.

[0142] The fixing force is controlled to ensure stability while not excessively compressing the bone conduction vibrator 3 to affect its performance.

[0143] Avoid damaging sensitive components of the bone conduction vibrator 3, such as the vibrating diaphragm or the coil, during the fixation process.

[0144] Step 4: Fixing or forming the bracket 1

[0145] Depending on the specific needs of the product, you can choose one of the following two methods:

[0146] a) Fixing the bracket 1 inside the product: This method is suitable for situations where the bracket 1 needs to be produced separately. The fixing method can be a buckle, a screw 8 or an adhesive. When selecting a fixing method, the use environment and disassembly and maintenance requirements of the product need to be considered.

[0147] b) The bracket 1 is molded as a part of the internal structure of the product, the end cover of the product or the side wall of the product: This integrated design can simplify the production process, reduce the number of parts and components, and improve the overall performance of the product.

[0148] The bone conduction vibrator 3 and the bracket 1 are installed in the vibration chamber 12. The acoustic impedance of the material of the curved surface of the vibration chamber 12 facing the outside or the surroundings is preferably in the range of [0.05, ∞]*10 6 Rayleigh (kg / m 2 ·s), so that when the sound waves propagate from the product shell to the air, the sound waves attenuate more at the interface between the earphone and the air, resulting in less sound leakage. There are many materials that meet the above conditions, such as hard plastics, metals, ceramics, glass, wood, plastic alloys, composite materials (glass fiber reinforced plastics, carbon fiber reinforced plastics, nylon + glass fiber, etc.), composite boards (PC / PMMA), etc.

[0149] Multi-support surface design:

[0150] In order to further improve the stability of fixation and the vibration conduction effect, two or more support surfaces 4 can be designed on the bracket 1. The multi-support surface design can disperse the stress more evenly and improve the reliability of the product. The specific implementation methods include:

[0151] Double support surfaces: Support surfaces 4 are provided at both ends of the bone conduction vibrator 3 to provide more stable support.

[0152] Three supporting surfaces: supporting surfaces 4 are provided at both ends and in the middle to further optimize stress distribution.

[0153] Lateral support: A supporting structure is provided on the side of the bone conduction vibrator 3, which may be continuous or discontinuous.

[0154] In the multi-support surface design, it is necessary to accurately control the position and flatness of each support surface 4 to ensure that the bone conduction vibrator 3 is evenly stressed and to avoid abnormal vibration caused by uneven support.

[0155] Embodiment 2: Bone conduction vibrator fixing device

[0156] Please refer to Figure 1-14 The present invention also provides a bone conduction vibrator fixing device corresponding to the above method, comprising the following main components:

[0157] 1. Bracket 1

[0158] The bracket 1 is the basis of the entire fixture and has at least one supporting surface 4. The material selection of the bracket 1 is the same as described in the method, that is, a material with a Young's modulus greater than 1 GPa is selected, such as PC + glass fiber, nylon + glass fiber, ABS + glass fiber, etc. The design of the bracket 1 needs to consider the following aspects:

[0159] Overall strength: ensure that the product will not deform or break during use.

[0160] Surface finish: The support surface 4 needs to have good surface finish to ensure good contact with the bone conduction vibrator 3.

[0161] Dimensional accuracy: The key dimensions of the bracket 1, especially the dimensions of the supporting surface 4 and the vibration avoidance space 2, need to be strictly controlled, and the recommended tolerance level is within IT7.

[0162] 2. Vibration-proof space 2

[0163] The vibration avoidance space 2 is arranged on the bracket 1 and is located in the vibration direction of the bone conduction vibrator 3. According to the specific requirements of the product, a step-shaped, sloped or arched vibration avoidance space can be selected:

[0164] Step type: suitable for products with ample space, and can provide a clear air avoidance boundary.

[0165] Slope type: suitable for products that require gradual avoidance, which can reduce stress concentration.

[0166] Arched: Suitable for products with limited space but need to maximize the empty space.

[0167] The vibration avoidance space 2 is set to effectively reduce unnecessary contact and impact between the bone conduction vibrator 3 and the bracket 1, so that the audio nonlinear distortion caused by contact and impact will not occur. The size design of the vibration avoidance space 2 needs to consider the maximum amplitude of the bone conduction vibrator 3. It is generally recommended that the depth of the vibration avoidance space 2 be at least 1.2 times the maximum amplitude of the bone conduction vibrator 3 to leave a safety margin.

[0168] 3. Fixed structure

[0169] The fixing structure is used to fix the bone conduction vibrator 3 on the bracket 1 to ensure that at least a part of the bone conduction vibrator 3 is in contact with the support surface 4. According to different application scenarios and production requirements, the following fixing structures can be selected:

[0170] a) High adhesive structure 11:

[0171] Choose a high-performance glue such as epoxy or acrylate glue.

[0172] A glue coating groove or glue coating point is designed on the bracket 1 to ensure that the glue is evenly distributed.

[0173] Consider providing a positioning structure, such as a positioning pin or a positioning groove, to ensure that the bone conduction vibrator 3 maintains the correct position during the curing process.

[0174] b) Welding structure:

[0175] Welding points 5 or welding surfaces are provided on the support 1 .

[0176] Considering the weldability of the material, it may be necessary to plate a metal layer on the surface of the bracket 1 to facilitate welding.

[0177] A heat dissipation structure is designed to prevent the heat from damaging the bone conduction vibrator 3 during the welding process.

[0178] c) Extrusion riveting structure:

[0179] The bracket 1 is provided with a riveting protrusion or a groove.

[0180] Consider the plastic deformation capacity of the material to ensure that no cracks will occur after riveting.

[0181] The guide structure is designed to ensure that the bone conduction vibrator 3 can be accurately positioned during the riveting process.

[0182] d) Locking screw structure:

[0183] A threaded hole or a nut seat is designed on the bracket 1.

[0184] Consider the corresponding screw hole position 8 on the bone conduction vibrator 3.

[0185] Design anti-loosening structures, such as spring washers or anti-loosening glue, to ensure that they will not loosen during long-term use.

[0186] 4.Multi-support surface structure

[0187] In order to improve the stability of the fixation, two or more supporting surfaces 4 may be designed. The implementation of the multi-supporting surface structure may include:

[0188] End surface support: A flat or slightly concave support structure is provided at both ends of the bracket 1.

[0189] Side support: A continuous or discontinuous support structure is provided on the side of the bracket 1.

[0190] Combined support: Combine end and side supports to form multi-point fixation.

[0191] In the multi-support surface design, special attention should be paid to the parallelism and coplanarity between the support surfaces 4. It is recommended to control them within 0.02 mm to ensure that the bone conduction vibrator 3 is evenly stressed.

[0192] 5. Product integration structure

[0193] According to the specific requirements of the product, the bracket 1 can be designed as:

[0194] a) Independent structure:

[0195] Interfaces designed to be secured inside a product, such as snaps, threads, or adhesive surfaces.

[0196] Considering special needs such as waterproof and dustproof, it may be necessary to add sealing rings or waterproof coatings.

[0197] b) Integrated structure:

[0198] The bracket 1 is designed as a part of the internal structure, end cover or side wall of the product.

[0199] Consider mold design and injection molding process to ensure the feasibility of integrated molding.

[0200] Design reinforcing ribs or shuttle structures to improve overall strength.

[0201] Through the above detailed description, the bone conduction vibrator fixing method and device of the present invention can achieve stable and efficient vibration conduction, while extending the product life and improving user experience. The method and device are applicable to various bone conduction products, such as bone conduction headphones, hearing aids, smart glasses, etc., and provide strong support for the application and development of bone conduction technology.

[0202] Embodiment 3: Slope type single bearing surface fixation

[0203] like Figure 1 As shown, this embodiment shows a sloped air-avoiding single-support surface bone conduction vibrator fixing structure.

[0204] In this embodiment, the bracket 1 is made of PC + 30% glass fiber material, and its Young's modulus is about 6GPa, far exceeding the minimum requirement of 1GPa specified in the claims. A sloped vibration avoidance space 2 is designed at one end of the bracket 1, and the slope angle is 15°, which can provide sufficient avoidance volume without excessively weakening the bracket strength.

[0205] The bone conduction vibrator 3 is in direct contact with the single support surface 4 of the bracket 1 through its bottom. The surface roughness Ra of the support surface 4 is controlled within 0.8 μm to ensure good contact with the bone conduction vibrator 3. The bone conduction vibrator 3 and the bracket 1 are fixed with a high-adhesive adhesive 11, which is an epoxy-based high-adhesive adhesive with a shear strength of >10MPa and a temperature resistance of up to 100°C.

[0206] The advantages of this design are simple structure, easy processing and assembly. The sloped vibration avoidance space 2 not only provides enough space for the vibration of the bone conduction vibrator 3, but also plays a certain guiding role in the vibration process, reducing the loss of vibration energy.

[0207] Embodiment 4: Arched double bearing surface fixation

[0208] like Figure 2 As shown, this is a preferred example of an arched, airtight, double-support surface bone conduction vibrator fixation.

[0209] The bracket 1 is made of nylon + 40% glass fiber material, and the Young's modulus reaches 12 GPa. The middle part of the bracket 1 is designed with an arched vibration avoidance space 2, and the radius of the arch is 5 mm. This design provides the largest avoidance volume in a limited space.

[0210] The two ends of the bone conduction vibrator 3 are in contact with the two supporting surfaces 4 of the bracket 1 respectively. The parallelism between the two supporting surfaces 4 is controlled within 0.01 mm to ensure that the bone conduction vibrator 3 is evenly stressed. The bone conduction vibrator 3 and the bracket 1 are fixed by welding, and the welding point 5 is located at the end surface of the bone conduction vibrator 3 and the bracket 1.

[0211] This double bearing surface design provides more stable support and is particularly suitable for application scenarios that require high-precision positioning. The arched vibration avoidance space 2 not only provides sufficient space for vibration, but also reduces the resonant frequency of the bracket 1 to a certain extent, avoiding interference with the working frequency of the bone conduction vibrator 3.

[0212] Example 5: Step-type multi-support surface fixation

[0213] like Figure 3 As shown, this is an embodiment of a three-support-surface stepped air-avoiding clamping and fixing bone conduction vibrator among multiple support surfaces.

[0214] The bracket 1 is made of ABS + 20% glass fiber material with a Young's modulus of 3.5 GPa. Two stepped vibration avoidance spaces 2 are designed inside the bracket 1 to form three supporting surfaces 4. The height of each step is 0.5 mm, which can provide sufficient vibration avoidance space without excessively weakening the strength of the bracket.

[0215] The bone conduction vibrator 3 is in contact with three supporting surfaces 4 at the same time. The coplanarity of the three supporting surfaces 4 is controlled within 0.015 mm to ensure that the bone conduction vibrator 3 is evenly stressed. The bone conduction vibrator 3 is fixed to the bracket 1 by extrusion riveting, and a special riveting protrusion 7 is designed on the bracket 1.

[0216] This multi-support surface design provides maximum stability and is particularly suitable for applications that require long-term stable operation. The stepped vibration avoidance space 2 not only provides directional avoidance for vibration, but also enhances the overall rigidity of the bracket 1.

[0217] Example 6: Single bracket welding fixation

[0218] like Figure 4 As shown, this is an embodiment in which a single bracket and a bone conduction vibrator are fixed by welding.

[0219] The bracket 1 is made of PC+40% glass fiber material, and the Young's modulus is as high as 10GPa. A sloped vibration avoidance space 2 is designed on one side of the bracket 1, and the slope angle is 30°. This larger angle provides a larger avoidance volume.

[0220] The bone conduction vibrator 3 contacts the single support surface 4 of the bracket 1. The flatness of the support surface 4 is controlled within 0.005 mm to ensure good contact with the bone conduction vibrator 3. The bone conduction vibrator 3 and the bracket 1 are fixed by welding, and the welding point 5 is located at the end surface of the bone conduction vibrator 3 and the bracket 1. In order to facilitate welding, a copper layer with a thickness of 0.1 mm is plated at the corresponding position of the bracket 1.

[0221] The advantage of this design is that the connection is firm and it is suitable for scenes that require long-term stable operation. The single bearing surface design simplifies the processing technology and reduces production costs.

[0222] Example 7: Double-sided bracket welding and fixing

[0223] like Figure 5 As shown, this is another embodiment of welding fixation, but a double-sided bracket design is adopted.

[0224] Bracket 1 and bracket 1 are located on both sides of the vibrator, and are made of nylon + 30% glass fiber material with a Young's modulus of 8 GPa. A vibration avoidance space 2 is formed between the two brackets, and the space height is 1 mm, which is designed based on 1.5 times the maximum amplitude of the vibrator.

[0225] The bone conduction vibrator 3 is in contact with the supporting surfaces 4 of the two brackets 1. The bracket 1 is fixed to the bone conduction vibrator 3 by welding, and the welding points 5 are mainly concentrated in the middle. The two brackets 1 are installed symmetrically and fit tightly, and the gap between them is controlled within 0.02mm.

[0226] This double-sided bracket design provides better vibration containment and reduces the possibility of vibration propagation outward, making it suitable for application scenarios that require high-fidelity sound quality.

[0227] Example 8: Press riveting fixation

[0228] like Figure 6 As shown, this is an embodiment of fixing the bone conduction vibrator by rivet press riveting.

[0229] The bracket 1 is made of ABS+25% glass fiber material, and the Young's modulus is 4 GPa. The bracket 1 is designed as a symmetrical structure, with a vibration avoidance space 2 in the middle, and the avoidance height is 0.8 mm.

[0230] The bone conduction vibrator 3 is placed between the two end brackets 1. The rivet 7 passes through the specially designed holes of the bracket 1 and the bone conduction vibrator 3, and the whole structure is fixed by tight riveting. The rivet 7 is made of aluminum alloy material, which has good plastic deformation ability.

[0231] The advantages of this design are simple assembly and easy mass production. The riveted connection provides a stable fixing effect and is also convenient for later maintenance and replacement of the vibrator.

[0232] Example 9: Screw and spring fixing

[0233] like Figure 7 As shown, this is an embodiment of using a screw to press the vibrator onto the bracket through the spring extension part of the bone conduction vibrator.

[0234] The bracket 1 is made of PC+35% glass fiber material with a Young's modulus of 9 GPa. The bracket 1 is designed with a groove-shaped vibration-avoiding space 2 with a depth of 1.2 mm.

[0235] The spring sheet of the bone conduction vibrator 3 is designed with an extension part. The screw 8 presses the bone conduction vibrator 3 to the bracket 1 through the extension part of the spring sheet. The screw 8 is made of stainless steel and coated with anti-loosening glue to ensure that it will not loosen during long-term use.

[0236] This design utilizes the spring structure of the vibrator itself, simplifies the bracket design, and provides good fixing effect and vibration transmission.

[0237] Example 8: Screw outer cylinder fixation

[0238] like Fig.10 As shown, this is an embodiment of fixing the bone conduction vibrator by an outer tube and screws.

[0239] The outer cylinder 9 is made of ABS material and is integrally formed with the bone conduction vibrator 3. The bracket 1 is made of nylon + 20% glass fiber material with a Young's modulus of 5 GPa. The bracket 1 is designed with a groove matching the outer cylinder 9.

[0240] The screw 8 fixes the bone conduction vibrator 3 to the bracket 1 through the outer tube 9. The screw 8 is made of high-strength alloy steel and uses a locking washer to ensure reliability for long-term use.

[0241] The advantage of this design is that the vibrator is completely wrapped in the outer cylinder, providing better protection while also facilitating overall assembly and disassembly.

[0242] Example 11: Screw bracket fixation

[0243] like Fig. 9 As shown, this is an embodiment in which the outer cylinder is fastened between the brackets at both ends by screws.

[0244] The bracket 1 is made of PC+30% glass fiber material with a Young's modulus of 7 GPa. The bracket 1 is designed as a symmetrical structure with a vibration-proof space 2 in the middle with a height of 1.5 mm.

[0245] The outer cylinder 9 wraps the bone conduction vibrator 3 and is made of ABS material. The screw 8 passes through the bracket 1 and the outer cylinder 9 to fasten the entire structure together. The screw 8 is made of stainless steel and uses a locking nut to ensure that it will not loosen during long-term use.

[0246] This design provides maximum fixing stability and vibration isolation, and is particularly suitable for applications requiring high-quality sound output.

[0247] Embodiment 12: Integrated housing bracket fixation

[0248] like Fig.10 As shown, this is an embodiment of an integrated product housing bracket fixing a bone conduction vibrator.

[0249] The housing bracket 10 is made of PC + 40% glass fiber material and is integrally injection molded, and the Young's modulus reaches 11 GPa. The housing bracket 10 is designed with a vibration avoidance space 2 and a support surface 4. The depth of the vibration avoidance space 2 is 1 mm, and the surface roughness Ra of the support surface 4 is controlled within 0.4 μm.

[0250] The bone conduction vibrator 3 is directly fixed on the support surface 4 through the high-stick adhesive 11. The high-stick adhesive 11 is made of a silicone rubber-based material with a shear strength of >8MPa and a temperature resistance of up to 120°C.

[0251] This integrated design simplifies the product structure, reduces the number of components, and improves overall reliability. It is particularly suitable for application scenarios that require miniaturization and high integration.

[0252] Example 13: Single bracket fixed with glue

[0253] like Fig.11 As shown, this is an embodiment of a single bracket plus glue to fix the bone conduction vibrator.

[0254] The bracket 1 is made of nylon + 35% glass fiber material, and the Young's modulus is 10 GPa. The bracket 1 is designed with a vibration avoidance space 2 and an FPC avoidance space 12. The depth of the vibration avoidance space 2 is 0.7 mm, and the width of the FPC avoidance space is 1.5 mm.

[0255] The bone conduction vibrator 3 is fixed on the supporting surface of the bracket 1 by means of a high-adhesive glue 11. The high-adhesive glue 11 is an acrylic glue with a shear strength of >12MPa and a temperature resistance of up to 150°C.

[0256] This design not only provides vibration avoidance, but also takes into account the needs of FPC wiring, reflecting the holistic thinking of product design.

[0257] Example 14: State of a single bracket fixing the vibrator in a product

[0258] like Fig.12 As shown, this embodiment demonstrates the state in which a single bracket fixing device cooperates with a product shell structure to fix a bone conduction vibrator.

[0259] The bracket 1 is made of PC + 25% glass fiber material, and the Young's modulus is 5.5 GPa. The bracket 1 is fixed in the product housing 13 by buckles. The bone conduction vibrator 3 is fixed on the bracket 1 by high viscosity glue 11.

[0260] This design demonstrates how the bracket can be integrated with the overall product structure, providing an intuitive reference for product development.

[0261] Example 15: Double brackets and glue fixation

[0262] like Fig.13 As shown, this is an embodiment of a double-bracket and glue-fixed bone conduction vibrator.

[0263] Bracket 1 and bracket 1 are both made of ABS + 30% glass fiber material with a Young's modulus of 6 GPa. A vibration-proof space 2 is formed between the two brackets with a depth of 1.3 mm. The bone conduction vibrator 3 is fixed on the supporting surface 4 of the two brackets by high-stick adhesive 11.

[0264] This double-bracket design provides better vibration control and fixing stability, and is suitable for application scenarios with higher requirements on sound quality.

[0265] Example 16: The state of the vibrator fixed by double brackets in the product

[0266] like Fig.14 As shown, this embodiment demonstrates the state in which the double-bracket fixing device cooperates with the product shell structure to fix the bone conduction vibrator.

[0267] The bracket 1 and the bracket 1 are both made of nylon + 40% glass fiber material with a Young's modulus of 12 GPa. The bracket is fixed in the product housing 13 by screws 8. The bone conduction vibrator 3 is located between the two brackets and fixed by high viscosity glue 11.

[0268] This design demonstrates how the dual-bracket structure can be integrated into the overall product, providing a reference for more complex product designs.

[0269] 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 method for fixing a bone conduction vibrator in a product, characterized in that: The following steps are involved: Obtaining a support having at least one supporting surface; A vibration avoidance space is provided on the support, and the vibration avoidance space is located in the vibration direction of the bone conduction vibrator; Fixing the bone conduction vibrator on the bracket so that at least a portion of the bone conduction vibrator contacts the at least one supporting surface; The bone conduction vibrator and the bracket are installed in the vibration chamber, and the acoustic impedance of the material of the curved surface of the vibration chamber facing the outside or the surroundings is preferably in the range of [0.05, ∞]*10 6 Rayleigh (kg / m 2 ·s), so that when the sound waves propagate from the product housing into the air, the sound wave attenuation at the interface between the earphone and the air is relatively large, resulting in less sound leakage.

2. The fixing method according to claim 1, characterized in that: The vibration avoidance space is in a stepped, sloped or arched shape.

3. The fixing method according to claim 1, characterized in that: The step of fixing the bone conduction vibrator on the bracket includes: Applying high viscosity glue between the bone conduction vibrator and the bracket; or The bone conduction vibrator is fixed on the bracket by welding, extrusion riveting or locking screws.

4. The fixing method according to claim 1, characterized in that: Further including: Fixing the bracket inside the vibration chamber; or The bracket is formed as a part of the internal structure of the product vibration chamber, the product end cover or the product side wall. The acoustic impedance of the material of the curved surface of the vibration chamber facing the outside or the surroundings is preferably in the range of [0.05, ∞]*10 6 Rayleigh (kg / m 2 s) materials.

5. The fixing method according to claim 1, characterized in that: The at least one supporting surface includes two or more supporting surfaces, and the step of fixing the bone conduction vibrator on the bracket includes: The bone conduction vibrator is brought into contact with the two or more supporting surfaces.

6. A device for fixing a bone conduction vibrator in a product, characterized in that: include: A support having at least one supporting surface; A vibration avoidance space is provided on the support and is located in the vibration direction of the bone conduction vibrator; The fixing structure is used to fix the bone conduction vibrator on the bracket so that at least a part of the bone conduction vibrator contacts the at least one supporting surface.

7. The fixing device according to claim 6, characterized in that: The vibration avoidance space is in a stepped, sloped or arched shape.

8. The fixing device according to claim 6, characterized in that: The fixed structure comprises: Highly adhesive glue, used to bond the bone conduction vibrator and the bracket; or A welding structure, an extrusion riveting structure or a locking screw structure is used to fix the bone conduction vibrator on the bracket.

9. The fixing device according to claim 6, characterized in that: The bracket is configured as: Fixed inside the product vibration chamber; or As a part of the internal structure of the product vibration chamber, the end cover of the product or the side wall of the product, the acoustic impedance of the material of the curved surface of the vibration chamber facing the outside or the surroundings is preferably in the range of [0.05, ∞]*10 6 Rayleigh (kg / m 2 s) materials.

10. The fixing device according to claim 6, characterized in that: The at least one supporting surface comprises two or more supporting surfaces, and the fixing structure is configured as follows: The bone conduction vibrator is brought into contact with the two or more supporting surfaces.

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