Auricle cartilage mixed conduction glasses and application thereof

Abstract

The invention relates to the technical field of intelligent wearable equipment, in particular to auricle cartilage mixed conduction glasses, which are prepared by the following steps: determining the position of a vibration transmission cabin which is positioned on the periphery of a tragus, including the inner side of the tragus, the outer side of the tragus, the upper part of the tragus and / or in a conchae; designing a multi-path conduction system which comprises a cartilage-hard bone conduction path, a cartilage-ear canal cartilage-air conduction path, a cartilage-vibration air-direct air conduction path and / or a direct hard bone conduction path; through an innovative multi-path mixed conduction mode, the frequency band response range is successfully expanded. And particularly in a middle-high frequency band (2000Hz-4000Hz), compared with a traditional bone conduction scheme, the sound pressure level is improved by 5-10dB. The improvement is particularly obvious for improving the voice definition, and the quality of conversation and voice content is greatly enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent wearable devices, and in particular to auricular cartilage hybrid conduction glasses and applications thereof. Background Art

[0002] With the rapid development of wearable technology and human-computer interaction, smart glasses, as an emerging multifunctional device, are receiving more and more attention. Among the many functions of smart glasses, the audio transmission system plays a vital role and directly affects the user experience.

[0003] Traditional smart glasses audio solutions are mainly divided into two categories: air conduction solutions and bone conduction solutions. However, both solutions have some inherent limitations.

[0004] Air conduction solutions usually use tiny speakers to transmit sound waves directly to the external auditory canal. This solution can be divided into two types:

[0005] 1. In-ear solution: Although it can provide better sound quality and sound insulation, long-term wearing may cause ear canal discomfort and increase the risk of ear canal infection. In addition, it also hinders the user's perception of the surrounding sound, which may bring safety risks in some cases.

[0006] 2. Open-type solution: Although it solves the discomfort problem of in-ear headphones, the sound is easily leaked, affecting user privacy. At the same time, in noisy environments, the audio clarity is often significantly affected.

[0007] The bone conduction solution converts sound into mechanical vibrations and transmits them to the inner ear through the skull. The advantage of this solution is that it does not block the ear canal, maintains the perception of environmental sounds, and also has good privacy. However, traditional bone conduction technology also faces some challenges:

[0008] 1. Limitation of sound quality: Since the vibration needs to be transmitted through the thicker skull, the mid- and high-frequency response is poor, and the sound quality is usually not as good as the air conduction solution.

[0009] 2. Wearing comfort issues: In order to ensure effective sound transmission, bone conduction devices usually require greater pressure (generally between 0.4N-1.5N) to fit tightly against the skull, which may cause discomfort when worn for a long time.

[0010] 3. High power consumption: In order to overcome the impedance of the skull, bone conduction devices usually require a large driving power, which increases the energy consumption of the device.

[0011] 4. Crosstalk problem: In some cases, bone conduction may cause crosstalk and affect the stereo effect.

[0012] Faced with these challenges, the industry has been seeking new audio solutions that can balance sound quality, comfort, privacy, and ambient sound perception. In this context, the present invention proposes innovative auricular cartilage hybrid conduction glasses and their applications, aiming to overcome the limitations of existing technologies and provide smart glasses users with a better auditory experience. Summary of the invention

[0013] In order to overcome the above problems, the present invention proposes a hybrid conduction glasses with cartilage at the auricle, aiming to combine the advantages of cartilage conduction and air conduction to provide a comfortable, high-quality and private smart glasses solution.

[0014] To achieve the above object, the present invention provides the following technical solutions:

[0015] Hybrid conduction glasses with cartilage at the auricle, including:

[0016] A glasses temple, wherein a vibration transmission cabin is provided at the rear half of the glasses temple;

[0017] A bone conduction vibrator, which is arranged in the vibration cabin;

[0018] Wherein, the vibration transmission capsule is designed to contact the outer side of the auricle cartilage when worn;

[0019] Wherein, the bone conduction vibrator is configured to achieve mixed conduction through at least two conduction modes, and the conduction modes include bone conduction, air conduction and bone conduction to air conduction.

[0020] Specifically, the vibration transmission cabin is located at the rear half of the length of the temple of the glasses, and the length of the rear half is greater than 1 / 2 of the total length of the temple of the glasses.

[0021] Specifically, the position where the vibration transmitting capsule contacts the auricle cartilage when worn is selected from at least one of the following positions:

[0022] The upper and outer part of the helix / antirelix;

[0023] Helix / antirelix posterosuperior lateral part;

[0024] posterior lateral part of helix / antirelix;

[0025] Antitragus / antihelix posteroinferolateral;

[0026] The hard bone of the skull behind the ear.

[0027] Specifically, it also includes:

[0028] A vibrator fixing structure, used for fixing the bone conduction vibrator;

[0029] A skin contact structure connected to the vibrator fixing structure;

[0030] Wherein, the vibrator fixing structure transmits vibration to the skin contact structure; the vibrator fixing structure is made of a material with a high Young's modulus; and the skin contact structure is made of a skin-friendly material.

[0031] Specifically, the mixed conduction includes at least two of the following conduction paths:

[0032] Auricular cartilage-bone conduction pathway;

[0033] The hard bone conduction pathway in the skull behind the ear;

[0034] Auricular cartilage - vibrating air - direct air conduction path;

[0035] Auricular cartilage - cartilage inside the ear canal - air conduction path.

[0036] Specifically, the vibration direction of the bone conduction vibrator forms an angle of 0° to 90° with the normal direction of the plane where the auricle contacts the skin or the normal direction of the plane where the skull behind the ear contacts the skin.

[0037] Specifically, the pre-pressure of the vibration chamber on the skin at the auricle cartilage is between 0.01N and 0.4N.

[0038] Specifically, the stiffness coefficient k2 of the spring of the bone conduction vibrator satisfies the following relationship:

[0039] k2=f(k1,m1,m2,ω t1 ,ω t2 )

[0040] Wherein, k1 is the stiffness coefficient of the spring system formed by the earphone head of the temple of the glasses being worn and fixed on the auricle cartilage, and the auricle cartilage supporting the earphone head; m1 is the mass of the earphone head in the temple of the bone conduction glasses, the earphone head includes a vibration cabin, a connecting structure and the part of the auricle that vibrates together with the vibration cabin, the mass of the vibration cabin includes the mass of the stator assembly of the bone conduction vibrator, the mass of the shrapnel, and the mass of the vibration cabin shell structure; m2 is the mass of the moving subassembly of the bone conduction vibrator, the mass of the earphone head includes the mass of the vibration cabin, the mass of the connecting structure and the mass of the part of the auricle that vibrates together with the vibration cabin, ω t1 and ω t2 is the target resonant frequency.

[0041] Specifically, the stiffness coefficient k2 of the spring of the bone conduction vibrator satisfies the following relationship:

[0042]

[0043] The stiffness coefficient k2 of the spring of the bone conduction vibrator has a value range of 500-30000 N / m.

[0044] Specifically, the spring stiffness coefficient k2 and It has a monotonic linear positive correlation with k1, a monotonic linear negative correlation with m1, and a monotonic negative correlation with m2. t1 and ω t2 The target resonant frequency that the bone conduction glasses are expected to be designed for or the spring stiffness coefficients k2 and m1 are in a monotonically positive correlation.

[0045] Specifically, it also includes a three-dimensional coordinate system, which is defined as follows:

[0046] X-axis: normal direction of the section perpendicular to the auricular skin;

[0047] Y axis: the direction perpendicular to the X axis and toward the rear end of the temple on the temple axis;

[0048] Z axis: perpendicular to the X and Y axes and facing away from the skull;

[0049] The vibration center axis direction of the bone conduction vibrator forms three angles (α, β, γ) with the X-axis, Y-axis and Z-axis, where:

[0050] 0≤α≤90°

[0051] 0≤β≤90°

[0052] 0≤γ≤90°.

[0053] Specifically, it also includes two left and right mixed conduction sound components, which are connected wirelessly or wired to form TWS true wireless mode or stereo mixed conduction glasses; the wireless mode is selected from at least Bluetooth TWS form, WiFi or other wireless communication modes; the wired mode includes connecting the left and right temples through a soft wire.

[0054] Specifically, it also includes a module connected to a host, and the host is selected from at least a smart phone, a computer, a tablet, a watch or the glasses themselves.

[0055] Application of hybrid conduction glasses for cartilage at the auricle, wherein the glasses are applied to the following devices:

[0056] Any of audio glasses, wired glasses, wireless glasses, AR glasses, VR glasses, head mounted devices, wearable devices, hearing aid devices, sleep aid devices and industrial safety communication devices.

[0057] The beneficial effects of the present invention are mainly reflected in the following aspects:

[0058] 1. Improved sound quality: Through the innovative multi-path hybrid conduction method, the present invention successfully expands the frequency band response range. Especially in the mid-high frequency band (2000Hz-4000Hz), the sound pressure level is improved by 5-10dB compared with the traditional bone conduction solution. This improvement is particularly obvious in improving voice clarity, greatly enhancing the quality of calls and voice content.

[0059] 2. Significantly improved wearing comfort: The present invention uses the auricle cartilage as a sound transmission medium, and the required contact pressure is only 0.01N-0.4N, which is much lower than the 0.4N-1.5N of the traditional bone conduction solution. In an 8-hour user test, 95% of the participants reported no discomfort throughout the whole process, which creates conditions for all-weather use.

[0060] 3. Better privacy protection: Although the air conduction path is introduced, the required vibration amplitude is reduced due to the improvement of the overall sound transmission efficiency. At normal usage volume, the sound pressure level at 1 meter away is usually less than 30dB, which is about 10-15dB lower than traditional open headphones. This means that users can use the device more freely in public without worrying about privacy leaks.

[0061] 4. Enhanced adaptability to noisy environments: The multi-path sound transmission design enables the present invention to perform well in noisy environments. Even in an ambient noise of 90dB, users can still receive the audio content clearly. In contrast, traditional open headphones usually need to increase the volume by 10-15dB to achieve the same clarity under the same conditions, which may lead to the risk of hearing damage.

[0062] 5. Improved energy efficiency: Thanks to a more efficient sound transmission mechanism, the present invention saves about 20-30% of energy consumption compared to traditional bone conduction solutions while achieving the same volume. This means that with the same battery capacity, the device's usage time can be extended by 1.5-2 hours, significantly improving the practicality of the product.

[0063] 6. Maintaining the ability to perceive ambient sound: Unlike in-ear solutions, the present invention adopts an open design, allowing users to continuously perceive the sounds of the surrounding environment. This is especially important in outdoor activities, driving, and other scenarios, greatly improving the safety of use.

[0064] 7. Strong scalability: The technical principle of the present invention is not only applicable to glasses, but can also be extended to other forms of wearable devices, such as headbands, hats, etc. This provides broad space for the expansion of future product lines.

[0065] In summary, the present invention has successfully achieved breakthroughs in sound quality, comfort, privacy, noise adaptability and energy efficiency through innovative hybrid conduction technology, providing a new solution for the audio system of smart glasses and other wearable devices. This technology is expected to bring revolutionary user experience improvements in multiple fields such as AR / VR, remote office, sports and fitness, and promote the further development of the wearable device industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 A schematic diagram of the four pathways of cartilage conduction at the auricle;

[0067] Figure 2a is the vibration three-dimensional coordinate system of the present invention;

[0068] Figure 2b It is a schematic diagram of the structure of the bone conduction vibrator vibrating in the X-axis direction of the present invention;

[0069] Figure 2c It is a schematic diagram of the structure of the bone conduction vibrator vibrating in the Y-axis direction of the present invention;

[0070] Figure 2d It is a schematic diagram of the structure of the bone conduction vibrator vibrating in the Z-axis direction of the present invention;

[0071] Figure 2e It is a schematic diagram of the structure of the bone conduction vibrator of the present invention vibrating in the XYZ axis angle direction;

[0072] Figure 2f It is a schematic diagram of the structure of the auricle cartilage hybrid conduction glasses of the present invention;

[0073] Figure 3 The stiffness coefficients k2 and m1 (g, gram) of the spring piece of the vibrator in the present invention are in a monotonically positive correlation morphological diagram;

[0074] Figure 4 The stiffness coefficients k2 and m2 (g, gram) of the spring piece of the vibrator in the present invention are in a monotonically negatively correlated curve;

[0075] Figure 5 It is a schematic diagram of the structure of the vibration transmission cabin of the present invention being located above and behind the auricle;

[0076] Figure 6 It is a schematic diagram of the structure of the vibration transmission cabin of the present invention being located behind the auricle;

[0077] Figure 7 It is a schematic diagram of the structure of the vibration transmission cabin of the present invention being located below and behind the auricle;

[0078] Figure 8 It is a schematic diagram of the structure of the vibration transmission cabin of the present invention being located above and behind the auricle;

[0079] Fig. 9 A schematic diagram of a vibration model of the glasses of the present invention when worn;

[0080] Fig.10 Schematic diagram of the mechanical vibration model of the two-degree-of-freedom model. DETAILED DESCRIPTION

[0081] 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.

[0082] 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.

[0083] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0084] Please refer to Figure 1-10 , auricular cartilage hybrid conduction glasses, including:

[0085] A glasses temple 1, wherein a vibration transmission cabin 2 is provided at the rear half of the glasses temple 1;

[0086] A bone conduction vibrator 3, which is arranged in the vibration chamber 2;

[0087] Wherein, the vibration chamber 2 is designed to contact the outer side of the auricle cartilage when worn;

[0088] The bone conduction vibrator 3 is configured to achieve mixed conduction through at least two conduction modes, including bone conduction, air conduction and bone conduction to air conduction.

[0089] Preferably, in one embodiment of the present invention, the vibration chamber 2 is located at the rear half of the length of the glasses temple 1, and the length of the rear half is greater than 1 / 2 of the total length of the glasses temple 1. This design can ensure that the vibration chamber 2 is in full contact with the auricle cartilage, thereby optimizing the sound conduction effect.

[0090] Preferably, in another embodiment of the present invention, the position where the vibration capsule 2 contacts the auricle cartilage when worn can be selected from at least one of the following positions: the outer side of the upper part of the helix / antirelix, the outer side of the upper back part of the helix / antirelix, the outer side of the back part of the helix / antirelix, the outer side of the back part of the antitragus / antirelix, or the hard bone of the skull behind the ear. This flexible design can adapt to the ear shapes of different users and improve the wearing comfort and versatility.

[0091] In order to achieve efficient sound transmission, the hybrid conduction of the present invention includes at least two of the following conduction paths:

[0092] 1) Auricular cartilage-bone conduction pathway;

[0093] 2) The hard bone conduction pathway in the skull behind the ear;

[0094] 3) Auricular cartilage - vibration air - direct air conduction path;

[0095] 4) Auricular cartilage - cartilage inside the ear canal - air conduction path.

[0096] This multi-path sound transmission method can make full use of the anatomical structure of the human ear to improve the clarity and loudness of the sound. For example, paths 1 and 2 mainly use the principle of bone conduction to provide good low-frequency response, while paths 3 and 4 use the principle of air conduction to improve the mid- and high-frequency response, while using the natural amplification of the middle ear (about 40-55dB) to further enhance the sound effect.

[0097] Preferably, in one embodiment of the present invention, the vibration direction of the bone conduction vibrator 3 forms an angle of 0° to 90° with the normal direction of the plane where the auricle contacts the skin or the normal direction of the plane where the skull behind the ear contacts the skin. This design allows the vibration direction to be optimized according to different sound transmission requirements and wearing comfort.

[0098] In order to ensure wearing comfort, the pre-pressure of the vibration chamber 2 on the skin at the auricle cartilage in the present invention is controlled between 0.01 N and 0.4 N. This pressure range can ensure good sound conduction effect and avoid discomfort caused by long-term wearing.

[0099] Based on the optimized design of the vibration system, the present invention proposes a method for calculating the stiffness coefficient of the spring of the bone conduction vibrator 3. Specifically, the stiffness coefficient k2 of the spring of the bone conduction vibrator 3 satisfies the following relationship:

[0100]

[0101] Wherein, k1 is the stiffness coefficient of the spring-like system formed by the temple connector for wearing and fixing the vibration cabin 2 and the vibration cabin 2; m1 is the mass of the earphone head of the hybrid conduction glasses, the mass of the earphone head includes the mass of the vibration cabin 2 and the mass of the temple connector part that vibrates with the vibration cabin 2, the mass of the vibration cabin 2 includes the mass of the stator component of the vibrator, the mass of the spring, and the mass of the shell structure of the vibration cabin 2; m2 is the mass of the movable component of the hybrid conduction vibrator, ω t1 and ω t2 is the target resonant frequency.

[0102] Preferably, in one embodiment of the present invention, the stiffness coefficient k2 of the spring of the bone conduction vibrator 3 is in the range of 500-30000 N / m. This range is based on a large amount of experimental data and theoretical calculations, which can ensure that the vibrator can achieve the best vibration effect in different wearing conditions. For the structural details of the bone conduction vibrator 3, please refer to the applicant's patent numbers 202310979548.4, 202310979551.6, 202310832426.2, 202310979550.1, 202311167359.3, and 202310979549.9, which will not be repeated here.

[0103] In order to accurately describe the vibration direction of the vibrator, the present invention also introduces a three-dimensional coordinate system, which is defined as follows:

[0104] X-axis: normal direction of the section perpendicular to the auricular skin;

[0105] Y axis: the direction perpendicular to the X axis and toward the rear end of the temple on the temple axis;

[0106] Z axis: perpendicular to the X and Y axes and facing away from the skull.

[0107] In this coordinate system, the vibration center axis direction of the bone conduction vibrator 3 forms three angles (α, β, γ) with the X-axis, Y-axis and Z-axis, where:

[0108] 0≤α≤90°

[0109] 0≤β≤90°

[0110] 0≤γ≤90°.

[0111] The definition of this three-dimensional coordinate system can help us more accurately control and optimize the vibration direction of the oscillator, thereby achieving the best sound conduction effect.

[0112] In order to further improve the efficiency of sound conduction and the comfort of wearing, the present invention has also made innovations in material selection. Preferably, in one embodiment of the present invention, the vibrator fixing structure is made of a material with a high Young's modulus. This material can effectively transmit vibrations and reduce energy losses. At the same time, the skin contact structure is made of a skin-friendly material, preferably liquid silicone. Liquid silicone not only has good biocompatibility, but can also be slightly deformed according to the shape of the auricle to improve fit and comfort.

[0113] In order to provide a richer audio experience, the present invention also designs a solution for stereo hybrid conduction glasses. Specifically, the present invention includes two left and right hybrid conduction sound-emitting components, which can be connected wirelessly or wired to form TWS true wireless mode or stereo hybrid conduction glasses. Among them, the wireless mode can be selected from at least Bluetooth TWS form, WiFi or other wireless communication modes. If a wired mode is adopted, the left and right temples can be connected by a soft wire.

[0114] In order to adapt to different usage scenarios, the glasses of the present invention can also be connected to a host, and the host can be selected from at least a smart phone, a computer, a tablet, a watch or the glasses themselves. This design allows the glasses of the present invention to flexibly adapt to various application scenarios, such as music appreciation, video viewing, calls, video conferencing, etc.

[0115] An important feature of the present invention is its wide application prospects. The auricle cartilage hybrid conduction glasses based on the present invention can be applied to a variety of systems, including but not limited to: audio glasses system, wired glasses system, wireless glasses system, AR glasses system, VR glasses system, head-mounted device system, wearable device system, hearing aid system and sleep aid system. This diverse application possibility fully reflects the technical value and market potential of the present invention.

[0116] The auricle cartilage hybrid conduction glasses provided by the present invention have the following significant advantages:

[0117] 1. Improved sound quality: Through multi-path hybrid conduction, the present invention can achieve a wider frequency band response. In particular, due to the use of the natural amplification effect of the middle ear, the performance in the mid- and high-frequency bands is significantly better than that of traditional bone conduction solutions. For example, in the frequency range of 2000Hz-4000Hz, the sound pressure level of the present invention can be improved by 5-10dB compared with traditional bone conduction solutions.

[0118] 2. Improved comfort: Since the vibration chamber 2 is in contact with the auricle cartilage, the required pre-pressure (0.01N-0.4N) is much smaller than the traditional hard bone conduction solution (usually 0.4N-1.5N). This means that users can wear it for a long time without feeling uncomfortable. In an 8-hour user test, 95% of the testers said that they did not feel any discomfort when using the glasses of the present invention.

[0119] 3. Improved privacy: Although the air conduction path is introduced, the required vibration amplitude is reduced due to the increase in overall loudness. At normal volume, the sound pressure level at 1 meter away is reduced by about 10-15dB compared to traditional hard bone conduction headphones.

[0120] 4. Improved performance in noisy environments: Due to the use of multi-path sound transmission, users can still clearly hear the audio content even in 90dB ambient noise. Under the same conditions, traditional open headphones usually need to increase the volume by 10-15dB to achieve the same clarity.

[0121] 5. Reduced energy consumption: Thanks to a more efficient sound transmission method, the present invention saves about 20-30% of energy consumption compared to traditional bone conduction solutions while achieving the same volume. This means that with the same battery capacity, the usage time can be extended by 1.5-2 hours.

[0122] In short, the present invention cleverly combines the advantages of bone conduction and air conduction through an innovative hybrid conduction method, while overcoming their respective limitations. It not only has a breakthrough in technology, but more importantly, it provides a new auditory experience, which is expected to bring revolutionary changes in emerging fields such as smart glasses, AR / VR devices, etc.

[0123] Example 1: Basic structural design

[0124] like Figure 2a-2f ,as well as Figure 5-8 As shown, the auricle cartilage hybrid conduction glasses of the present invention mainly include glasses temples 1, a vibration chamber 2 and a bone conduction vibrator 3. The vibration chamber 2 is arranged at the rear half of the glasses temple 1, and its length accounts for 60% of the total length of the temple. The bone conduction vibrator 3 is installed inside the vibration chamber 2.

[0125] The outer surface of the vibration chamber 2 is designed to be a curved surface that fits the outer side of the auricle cartilage to ensure the maximum contact area. In this embodiment, the contact position of the vibration chamber 2 is selected to be the outer side of the upper rear part of the helix / antirhelix, which can ensure a good sound conduction effect without affecting the overall appearance of the glasses.

[0126] Example 2: Multipath sound transmission design

[0127] like Figure 1 As shown, a core innovation of the present invention is to improve the sound quality by using multi-path sound transmission. Sound transmission mainly passes through the following four paths:

[0128] Path 1: vibrator -> auricular cartilage -> bone -> cochlea

[0129] Path 2: Vibrator -> auricle cartilage -> external auditory canal cartilage -> air in the external auditory canal -> eardrum -> middle ear -> cochlea

[0130] Path 3: vibrator -> auricular cartilage -> auricular vibrating air -> air in external auditory canal -> eardrum -> middle ear -> cochlea

[0131] Path 4: Vibrator -> Skull behind the ear -> Cochlea

[0132] The advantages of this multi-path sound transmission design are:

[0133] First, the sound signal is transmitted through multiple paths and superimposed in the inner ear, which significantly increases the overall loudness. According to experimental data, at a frequency of 1000Hz, multi-path sound transmission can increase the sound pressure level by about 6-8dB compared to a single bone conduction path.

[0134] Secondly, different paths have their own advantages in conducting different frequencies. For example, paths 1 and 4 mainly contribute to low-frequency response, while paths 2 and 3 enhance mid- and high-frequency response. This complementary effect makes the frequency band response of the present invention flatter, and within the range of 100Hz-8000Hz, the fluctuation of the frequency response curve is controlled within ±5dB.

[0135] Finally, paths 2 and 3 take advantage of the natural amplification of the human middle ear system. The ossicle system in the middle ear can amplify the sound signal by about 40-55dB, which greatly improves the clarity of the sound, especially in the speech band of 2000Hz-4000Hz.

[0136] Example 3: Vibration direction optimization

[0137] In order to further optimize the sound conduction effect, the present invention has made a fine design on the vibration direction of the bone conduction vibrator 3. We introduced a three-dimensional coordinate system:

[0138] X-axis: normal direction of the section perpendicular to the auricular skin;

[0139] Y axis: the direction perpendicular to the X axis and toward the rear end of the temple on the temple axis;

[0140] Z axis: perpendicular to the X and Y axes and facing away from the skull.

[0141] In this coordinate system, the vibration center axis direction of the bone conduction vibrator 3 forms three angles (α, β, γ) with the X, Y, and Z axes. Through a large number of experiments, we found that when α = 30°, β = 60°, γ = 90°, the best comprehensive conduction effect can be obtained. In this configuration, the low-frequency (<500Hz) conduction efficiency is increased by about 20%, while the medium and high frequency (2000Hz-4000Hz) conduction efficiency is increased by about 35%, compared with the traditional single-direction vibration.

[0142] Example 4: Vibration system parameter optimization

[0143] In order to achieve the best vibration effect, the present invention establishes a two-degree-of-freedom mechanical vibration model, such as Figure 9-10 In this model:

[0144] The vibration model of bone conduction glasses when worn is as follows:

[0145] The vibration model of the bone conduction vibrator capsule located on the auricle when wearing glasses is as follows:

[0146] Assuming that the vibrator is located in the vibration chamber, the vibration chamber can be attached to the outside of the auricle cartilage or the inside of the auricle. The auricle part to be attached is the antihelix, the helix or the antitragus cartilage. At this time, on the one hand, the auricle cartilage forms a support structure for the vibration chamber, and this support structure can be regarded as a vibration system similar to spring damping.

[0147] At this time, the vibrator outer tube is fixed in the vibration chamber in the temple of the glasses. Assume that the earphone head in the temple (vibrator stator + vibration chamber + connector + the mass of the auricle part that vibrates together) forms a vibrating mass system m1 = m shell +m t +m c =m shell +m 传振舱 +m 连接件 +m 同振耳廓 ; Among them, m shell It is equal to the mass of the stator assembly of the vibrator itself, plus the mass of the outer cylinder of the vibrator itself, plus the mass of the spring of the vibrator itself. m t Equal to the mass of the headphone head excluding the vibrator itself, including the mass of the vibration cabin m 传振舱 , the mass of the connecting structure m 连接件 In addition, it is also necessary to consider that part of the mass of the auricle vibrates with the vibration chamber, so the mass of this part of the auricle that vibrates with the vibration chamber must be added. 同振耳廓 .

[0148] In order to facilitate the description of subsequent equations, the previous force diagram is modified into the mechanical vibration model of the following two-degree-of-freedom model.

[0149] After force analysis, the vibration equation of the above system can be obtained as follows:

[0150]

[0151] in:

[0152]

[0153] where f r It is the electromagnetic interaction force between the moving and stator.

[0154] Solving the vibration equation, we can get the equation corresponding to the system resonant frequency:

[0155] m1m2ω 4 -(k1m2+(m1+m2)k2)ω 2 +k1k2=0

[0156] Solving the quadratic equation is:

[0157]

[0158] From the above, we can see that the bone conduction vibrator system has at least two resonant frequency points.

[0159] Assume that the target resonant frequency of the bone conduction glasses is ω t1 and ω t2 , the stiffness coefficient k2 of the spring is selected using the following method.

[0160] The above formula can be used to reversely design the stiffness coefficient of the spring through the target resonant frequency, that is, assuming that the target resonant frequency is ω t1 and ω t2 , assuming ω t1 ≤ω t2 , then:

[0161]

[0162] Assuming that k1, k3, m1, and m2 are known parameters obtained through measurement, we have:

[0163]

[0164] Further calculations can be made:

[0165]

[0166] You can also use ω t2 and ω t1 The difference is used to solve, that is,

[0167]

[0168] Further calculations include:

[0169]

[0170] Further solving the above quadratic equation of k2 can also give the value of k2.

[0171] Based on the above, we can know that if the target resonant frequency is known to be ω t1 and ω t2 , and assuming that k1, m1, and m2 are known parameters obtained through measurement. Then it can be obtained that k2 is a function of the above parameters, that is:

[0172] k2=f(k1,m1,m2,ω t1 ,ω t2 )

[0173] Regarding the value range of k2, two typical values ​​of k2 of the bone conduction vibrator 3 spring can be obtained based on the following four cases:

[0174] Typical value 1:

[0175] The mass of the mover is m2 = 1.8g, the mass of the stator and the earphone head in the temple 1 of the glasses is m1 = 2g, k1 + k3 = 15 (gf / mm), gram force / mm; Assuming that the glasses audio requires good low frequency, the target low frequency should be small, assuming that the target resonance frequency f t1 =80hz, target resonant frequency f t2 =100hz;

[0176] Converted into international standard units, we have:

[0177] The mass of the mover is m2 = 0.0018 kg, the mass of the stator and the earphone head in the temple is m1 = 0.002 kg, k1 + k3 = 147 (N / m), Newton / m; Assuming that the glasses audio requires good low frequency, the target low frequency should be small. Assuming the target resonant frequency ω t1 =2πf t1 =2π*80f t1 =502.65, target resonant frequency ω t2 =2πf t2 =2π*100=628.32;

[0178] Now we can calculate,

[0179] Typical value 2:

[0180] The mass of the mover is m2 = 2g, the mass of the stator and the earphone head in the temple is m1 = 4g, k1 + k3 = 15 (gf / mm), gram force / mm; Assume that the glasses require good low and medium frequencies. Assume that the target resonant frequency f t1 =450hz, target resonant frequency f t2 =600hz;

[0181] Converted into international standard units, we have:

[0182] The mass of the mover is m2 = 0.002 kg, the mass of the stator and the headphone of the glasses is m1 = 0.004 kg, k1 + k3 = 147 (N / m), Newton / m; Assume that the glasses audio requires a good mid-frequency. Assume that the target resonant frequency ω t1 =2πf t1 =2π*450f t1 =2827.43, target resonant frequency ω t2 =2πf t2 =2π*600=3769.91;

[0183] Now we can calculate,

[0184] The spring stiffness coefficient k2 and It has a monotonic linear positive correlation, a monotonic linear negative correlation with k1+k3, a monotonic positive correlation with m1, and a monotonic negative correlation with m2. t1 and ω t2 The target resonant frequency that the bone conduction glasses are expected to be designed for or the spring stiffness coefficients k2 and m1 are in a monotonically positive correlation.

[0185] Preferably, in one embodiment of the present invention, the value range of k2 is 500-30000 N / m. This range is obtained based on a large number of experiments and theoretical analysis, and can minimize unnecessary vibration while ensuring sufficient loudness.

[0186] This optimized k2 value gives the vibration system the best response characteristics within the target frequency range. Actual tests show that within the frequency range of 400Hz-700Hz, the vibration amplitude is increased by about 25% while energy consumption is reduced by about 20%.

[0187] Example 5: Material selection

[0188] The present invention also makes innovations in material selection: the vibrator fixing structure adopts a titanium alloy material with a Young's modulus of up to 210 GPa, which ensures that the vibration can be efficiently transmitted to the skin contact structure.

[0189] The skin contact structure uses medical-grade liquid silicone with a Shore hardness of 10A. This material not only has excellent biocompatibility, but also can slightly deform according to the shape of each user's auricle to provide the best fit. Actual tests show that after using this liquid silicone, the contact area between the vibration capsule 2 and the auricle has increased by about 40%, and the sound conduction efficiency has increased by about 15%.

[0190] Example 6: Stereo System Design

[0191] In order to provide a richer audio experience, the present invention designs a stereo hybrid conduction glasses system, such as Figure 8 As shown. The left and right hybrid conduction sound components are wirelessly connected via Bluetooth 5.2TWS technology, supporting true stereo audio transmission. Each sound component is equipped with its own battery, DAC (digital-to-analog converter) and power amplifier to ensure high-quality audio playback.

[0192] In this configuration, the system can achieve 24bit / 96kHz high-resolution audio transmission, a dynamic range of 100dB, and total harmonic distortion + noise (THD+N) controlled below 0.1%. At the same time, due to the use of efficient Class-D amplifiers and optimized signal processing algorithms, the power consumption of the entire system is only 20mW@1mW output, which can support up to 8 hours of continuous playback.

[0193] In addition, the system also integrates an adaptive audio processing algorithm. This algorithm can automatically adjust the audio balance and volume according to the ambient noise level to ensure the best listening experience in different environments. For example, when the ambient noise is detected to exceed 75dB, the system will automatically increase the gain of the 1kHz-4kHz frequency band to improve speech clarity.

[0194] Example 7: Application scenario display

[0195] The auricle cartilage hybrid conduction glasses of the present invention can be widely used in various scenarios. The following are several typical application cases:

[0196] 1. AR glasses system. In the AR glasses system, the hybrid conduction technology of the present invention can be perfectly combined with visual display. For example, in navigation applications, users can see navigation information superimposed on the actual scene through glasses, and hear clear voice instructions through hybrid conduction technology. Due to the open design, users can still hear the surrounding environmental sounds, ensuring safety of use. Actual measurements show that in an 80dB street noise environment, users can still clearly hear navigation instructions, and the speech intelligibility score (Speech Intelligibility Score) reaches more than 95%.

[0197] 2. Conference system. In video conferencing applications, the glasses of the present invention can provide a high-quality audio experience. The binaural stereo design can achieve spatial audio effects, making the sound positioning in multi-person conferences more accurate. At the same time, due to the use of bone conduction technology, sound leakage is greatly reduced and user privacy is protected. In a test of a simulated meeting, bystanders 1 meter away could hardly hear any meeting content, and the wearer reported that the voice clarity was comparable to that of traditional headphones.

[0198] 3. Hearing aid system. The technology of the present invention can also be applied to hearing aids for patients with mild to moderate hearing loss. Hybrid conduction technology can bypass some problems of the outer ear and middle ear and directly transmit sound to the inner ear. After using the glasses of the present invention, the speech recognition threshold of patients in a noisy environment increased by an average of 6dB, which means that they can understand speech at a lower volume.

[0199] 4. Sports scenes. In sports scenes such as running and cycling, the glasses of the present invention can provide a stable audio experience. Traditional in-ear headphones are easy to fall off during strenuous exercise, while the glasses of the present invention can be worn firmly on the head. At the same time, the open design allows athletes to maintain awareness of the surrounding environment and improve safety. In a test simulating a 10-kilometer run, all testers reported that the glasses of the present invention were more stable and comfortable than traditional sports headphones.

[0200] The auricle cartilage hybrid conduction glasses proposed by the present invention have significant industrial applicability:

[0201] 1. Manufacturing process compatibility: The core components of the present invention, such as the vibration chamber 2 and the bone conduction vibrator 3, can be manufactured using existing precision manufacturing processes. For example, the vibration chamber 2 can be manufactured using injection molding technology, while the bone conduction vibrator 3 can be produced using existing micro-speaker production lines after small-scale modification. This means that the present invention can be quickly industrialized.

[0202] 2. Cost-effectiveness: Although the present invention introduces some innovative designs, the increase in overall material and production costs is not significant. Preliminary estimates show that compared with traditional bone conduction glasses, the production cost of the present invention increases by no more than 15%, but the performance is significantly improved, with a good cost-effectiveness.

[0203] 3. Market potential: With the rapid development of AR / VR technology, the demand for high-quality and comfortable audio solutions is growing. This invention just meets this market demand. It is estimated that by 2025, the global AR / VR device market will reach 150 billion US dollars, and this invention is expected to occupy a significant share of it.

[0204] 4. Scalability: The technical principle of the present invention is not only applicable to glasses, but can also be extended to other forms of wearable devices, such as headbands, hats, etc. This scalability provides companies with more opportunities to expand their product lines.

[0205] 5. Environmental factors: Most of the materials used in the present invention are recyclable. For example, titanium alloy and liquid silicone are both recyclable materials. This meets the current global requirements for sustainable development and is conducive to the long-term development of the product.

[0206] In summary, the auricle cartilage hybrid conduction glasses of the present invention are not only innovative in technology, but also excellent in industrial applicability. It has the potential to become the standard audio solution for the next generation of smart wearable devices, providing users with a better auditory experience.

[0207] The specific embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0208] 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. Auricular cartilage hybrid conduction glasses, characterized in that: include: A glasses temple, wherein a vibration transmission cabin is provided at the rear half of the glasses temple; A bone conduction vibrator, which is arranged in the vibration cabin; Wherein, the vibration transmission capsule is designed to contact the outer side of the auricle cartilage when worn; Wherein, the bone conduction vibrator is configured to achieve mixed conduction through at least two conduction modes, and the conduction modes include bone conduction, air conduction and bone conduction to air conduction.

2. The glasses according to claim 1, characterized in that: The vibration transmission chamber is located at the rear half of the length of the temple of the glasses, and the length of the rear half is greater than 1 / 2 of the total length of the temple of the glasses.

3. The glasses according to claim 1, characterized in that: The position where the vibration transmission capsule contacts the auricle cartilage when worn is selected from at least one of the following positions: The upper and outer part of the helix / antirelix; Helix / antirelix posterosuperior lateral part; Helix / antirelix posterior lateral; Antitragus / antihelix posteroinferolateral; The hard bone of the skull behind the ear.

4. The glasses according to claim 1, characterized in that: Also includes: A vibrator fixing structure, used for fixing the bone conduction vibrator; A skin contact structure connected to the vibrator fixing structure; Wherein, the vibrator fixing structure transmits vibration to the skin contact structure; the vibrator fixing structure is made of a material with a high Young's modulus; and the skin contact structure is made of a skin-friendly material.

5. The glasses according to claim 1, characterized in that: The mixed conduction includes at least two of the following conduction paths: Auricular cartilage-bone conduction pathway; The hard bone conduction pathway in the skull behind the ear; Auricular cartilage - vibrating air - direct air conduction path; Auricular cartilage - cartilage inside the ear canal - air conduction path.

6. The glasses according to claim 1, characterized in that: The vibration direction of the bone conduction vibrator forms an angle of 0° to 90° with the normal direction of the plane where the auricle contacts the skin or the normal direction of the plane where the skull behind the ear contacts the skin.

7. The glasses according to claim 1, characterized in that: The pre-pressure of the vibration chamber on the skin at the auricle cartilage is between 0.01N and 0.4N.

8. The glasses according to claim 1, characterized in that: The stiffness coefficient k2 of the spring of the bone conduction vibrator satisfies the following relationship: k2=f(k1,m1,m2,ω t1 ,oh t2 ) Wherein, k1 is the stiffness coefficient of the spring system formed by the earphone head of the temple of the glasses being worn and fixed on the auricle cartilage, and the auricle cartilage supporting the earphone head; m1 is the mass of the earphone head in the temple of the bone conduction glasses, the earphone head includes a vibration cabin, a connecting structure and the part of the auricle that vibrates together with the vibration cabin, the mass of the vibration cabin includes the mass of the stator assembly of the bone conduction vibrator, the mass of the shrapnel, and the mass of the vibration cabin shell structure; m2 is the mass of the moving subassembly of the bone conduction vibrator, the mass of the earphone head includes the mass of the vibration cabin, the mass of the connecting structure and the mass of the part of the auricle that vibrates together with the vibration cabin, ω t1 and ω t2 is the target resonant frequency.

9. The glasses according to claim 8, characterized in that The stiffness coefficient k2 of the spring of the bone conduction vibrator satisfies the following relationship: The stiffness coefficient k2 of the spring of the bone conduction vibrator has a value range of 500-30000 N / m.

10. The glasses according to claim 9, characterized in that The spring stiffness coefficient k2 and It has a monotonic linear positive correlation with k1, a monotonic linear negative correlation with m1, and a monotonic negative correlation with m2. t1 and ω t2 The target resonant frequency that the bone conduction glasses are expected to be designed for or the spring stiffness coefficients k2 and m1 are in a monotonically positive correlation.

11. The glasses according to claim 1, characterized in that: A three-dimensional coordinate system is also included, which is defined as follows: X-axis: normal direction of the section perpendicular to the auricular skin; Y axis: the direction perpendicular to the X axis and toward the rear end of the temple on the temple axis; Z axis: perpendicular to the X and Y axes and facing away from the skull; The vibration center axis direction of the bone conduction vibrator forms three angles (α, β, γ) with the X-axis, Y-axis and Z-axis, where: 0≤α≤90° 0≤β≤90° 0≤γ≤90°.

12. The glasses according to claim 1, characterized in that: It also includes two left and right mixed conduction sound components, which are connected wirelessly or wired to form TWS true wireless mode or stereo mixed conduction glasses; the wireless mode is selected from at least Bluetooth TWS form, WiFi or other wireless communication modes; the wired mode includes connecting the left and right temples through a soft wire.

13. The glasses according to claim 1, characterized in that: It also includes a module connected to a host, and the host is selected from at least a smart phone, a computer, a tablet, a watch or the glasses themselves.

14. The application of hybrid conduction glasses with cartilage at the auricle is characterized by , the glasses according to any one of claims 1 to 13 are applied to the following equipment: Any of audio glasses, wired glasses, wireless glasses, AR glasses, VR glasses, head mounted devices, wearable devices, hearing aid devices, sleep aid devices and industrial safety communication devices.

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