CN119179201A - Cartilage mixed conduction glasses at auricle and application thereof - Google Patents

Abstract

The present invention relates to the technical field of intelligent wearable devices, and in particular, to cartilage hybrid conduction glasses at the auricle, comprising the following steps: determining the position of a vibration chamber, which is located around the tragus, including the inner side of the tragus, the outer side of the tragus, the upper part of the tragus, and/or the concha cavity; designing a multi-path conduction system, including 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 hybrid conduction method, the present invention successfully expands the frequency band response range. In particular, in the mid-to-high frequency band (2000Hz-4000Hz), the sound pressure level is increased by 5-10dB compared to the traditional bone conduction solution. This improvement is particularly significant in improving voice clarity, greatly enhancing the quality of calls and voice content.

Description

Cartilage mixed conduction glasses at auricle and application thereof

Technical Field

The invention relates to the technical field of intelligent wearable equipment, in particular to cartilage mixed conduction glasses at auricles and application thereof.

Background

With the rapid development of wearable technology and man-machine interaction fields, smart glasses are receiving more and more attention as emerging multifunctional devices. Among the many functions of smart glasses, the audio transmission system plays a vital role, directly affecting the user experience.

Traditional smart eyeglass audio solutions are largely divided into two categories, the air conduction scheme and the bone conduction scheme. However, both of these schemes have some inherent limitations.

Air conduction schemes typically employ micro-speakers to deliver sound waves directly to the external auditory meatus. Such schemes can be divided into two types:

1. In-ear solutions, while providing better sound quality and sound insulation, may lead to ear canal discomfort over prolonged wear, and also increase the risk of ear canal infection. In addition, it also impedes the perception of ambient sounds by the user, which in some cases may present a safety hazard.

2. In the open scheme, although the problem of discomfort in the in-ear mode is solved, sound is easy to leak, and privacy of a user is affected. Also, in noisy environments, audio clarity tends to be significantly affected.

Bone conduction is achieved by converting sound into mechanical vibrations, which are transmitted through the skull to the inner ear. The scheme has the advantages of not blocking the auditory canal, keeping the perception of the environmental sound and having better privacy. However, conventional bone conduction techniques also face some challenges:

1. Sound quality limitations-due to the vibration needs to be transmitted through the thicker skull bone, resulting in poor medium-high frequency response, tone quality is generally inferior to the air conduction scheme.

2. Wearing comfort problems bone conduction devices typically require a large pressure (typically between 0.4N-1.5N) against the skull in order to ensure effective sound transmission, which can lead to discomfort over extended periods of wear.

3. The power consumption is high-in order to overcome the impedance of the skull bone, the bone conduction means generally require a large driving power, which increases the energy consumption of the device.

4. Crosstalk problems-in some cases bone conduction may cause crosstalk, affecting the stereo effect.

In light of these challenges, the industry is continually seeking new audio solutions that compromise sound quality, comfort, privacy, and ambient sound perception. Under such a background, the invention provides innovative auricle cartilage mixing conduction glasses and application thereof, and aims to overcome the limitations of the prior art and provide a better hearing experience for intelligent glasses users.

Disclosure of Invention

In order to overcome the problems, the invention provides cartilage mixed conduction glasses at auricles, and aims to provide a comfortable, high-tone-quality and privacy intelligent glasses solution by combining the advantages of cartilage conduction and air conduction.

In order to achieve the above purpose, the present invention provides the following technical solutions:

a cartilage mixed conduction lens at the auricle comprising:

the glasses legs are provided with vibration transmission cabins at the rear half parts;

A bone conduction vibrator provided in the vibration transmission chamber;

wherein the vibration transmission cabin is designed to contact with the outer side of auricular cartilage when worn;

wherein the bone conduction vibrator is configured to realize mixed conduction through at least two conduction modes, wherein the conduction modes comprise bone conduction, air conduction and bone conduction and air conduction.

Specifically, the vibration transmission cabin is positioned at the rear half part of the length of the glasses leg, and the length of the rear half part is larger than 1/2 of the total length of the glasses leg.

Specifically, the vibration transmission capsule is worn at a position contacting auricular cartilage selected from at least one of the following positions:

The external side of the upper part of the helix/antitragus;

the rear upper outer side of the helix/antitragus;

the posterior lateral side of the helix/antitragus;

antitragus/antitragus posterior inferior lateral;

hard bone of the skull behind the ear.

Specifically, the method further comprises the following steps:

The oscillator fixing structure is used for fixing the bone conduction oscillator;

the skin contact structure is connected with the vibrator fixing structure;

The vibrator fixing structure transmits vibration to the skin contact structure, the vibrator fixing structure is made of a material with high Young's modulus, and the skin contact structure is made of a material with skin affinity.

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

Auricular cartilage-hard bone conduction pathway;

a hard bone conduction path of the retroauricular skull;

Auricular cartilage-vibrating air-direct air conduction path;

cartilage-air conduction path in auricular cartilage-ear canal.

Specifically, the vibration direction of the bone conduction vibrator forms an included angle of 0 to 90 degrees with the normal direction of the auricle contact skin plane or the normal direction of the skull bone contact skin plane behind the ear.

Specifically, the pre-pressure of the vibration transmission cabin on the skin at the auricular cartilage is between 0.01N and 0.4N.

Specifically, the stiffness coefficient k ₂ of the elastic sheet of the bone conduction vibrator satisfies the following relationship:

k₂＝f(k₁,m₁,m₂,ω_t1,ω_t2)

Wherein k ₁ is the stiffness coefficient of a spring-like system formed by the earphone head of the glasses leg being worn and fixed on auricle cartilage, m ₁ is the mass of the earphone head in the bone conduction glasses leg, the earphone head comprises a vibration transmission cabin, a connecting structure and an auricle part vibrating together with the vibration transmission cabin, the mass of the vibration transmission cabin comprises the mass of a stator component of the bone conduction vibrator, the mass of a spring sheet, the mass of a shell structure of the vibration transmission cabin, m ₂ is the mass of a rotor component of the bone conduction vibrator, the mass of the earphone head comprises the mass of the vibration transmission cabin, the mass of the connecting structure and the mass of the auricle part vibrating together with the vibration transmission cabin, and omega _t1 and omega _t2 are target resonance frequencies.

Specifically, the stiffness coefficient k ₂ of the elastic sheet of the bone conduction vibrator satisfies the following relationship:

The stiffness coefficient k2 of the elastic sheet of the bone conduction vibrator is 500-30000N/m.

Specifically, the spring stiffness coefficient k ₂ andA monotonic linear positive correlation is formed between the bone conduction glasses and k ₁, a monotonic linear negative correlation is formed between the bone conduction glasses and k ₁, a monotonic positive correlation is formed between the bone conduction glasses and m ₁, and a monotonic negative correlation is formed between the bone conduction glasses and m ₂, wherein omega _t1 and omega _t2 are target resonant frequencies of expected designs of the bone conduction glasses or monotonic positive correlation is formed between the stiffness coefficients k ₂ and m ₁ of the elastic sheets.

Specifically, the method further comprises a three-dimensional coordinate system, wherein the coordinate system is defined as follows:

The X axis is the normal direction of a tangential plane perpendicular to the skin of the auricle;

the Y axis is perpendicular to the direction of the X axis towards the rear end of the glasses leg on the axis of the glasses leg;

the Z axis is perpendicular to the X axis and the Y axis and deviates from the outward direction of the skull;

the vibration central axis direction of the bone conduction vibrator forms three included angles (alpha, beta, gamma) with an X axis, a Y axis and a Z axis, wherein:

0≤α≤90°

0≤β≤90°

0≤γ≤90°。

The sound-transmitting glasses further comprise a left sound-transmitting component and a right sound-transmitting component which are connected in a wireless or wired mode to form TWS real wireless mode or stereo mixed conduction glasses, wherein the wireless mode is at least selected from Bluetooth TWS mode, wiFi mode or other wireless communication modes, and the wired mode comprises the step of connecting left and right glasses legs through flexible wires.

In particular, the device further comprises a module connected with a host, wherein the host is at least selected from a smart phone, a computer, a tablet, a watch or glasses.

Application of cartilage hybrid conduction spectacles at auricles, said spectacles were applied to the following devices:

Any one of audio glasses, wired glasses, wireless glasses, AR glasses, VR glasses, head-mounted devices, wearable devices, hearing assistance devices, sleep assistance devices, and industrial safety communication devices.

The beneficial effects of the invention are mainly represented in the following aspects:

1. The invention successfully expands the frequency band response range through an innovative multi-path mixed conduction mode. Particularly in the middle-high frequency band (2000 Hz-4000 Hz), the sound pressure level is improved by 5-10dB compared with the traditional bone conduction scheme. This improvement is particularly evident in terms of enhancement of speech intelligibility, greatly enhancing the quality of speech and speech content.

2. The wearing comfort is obviously improved, the auricular cartilage is used as a sound transmission medium, and the required contact pressure is only 0.01N-0.4N, which is far lower than 0.4N-1.5N of the traditional bone conduction scheme. In a user test lasting 8 hours, 95% of the participants reported no discomfort throughout the course, which provides for all-weather use.

3. Privacy protection is better-although an air conduction path is introduced, the required vibration amplitude is instead reduced due to the improvement of the overall sound transmission efficiency. At normal use volume, sound pressure levels outside 1 meter are typically below 30dB, which is reduced by about 10-15dB over conventional open headphones. This means that the user can use the device more freely in public places without worrying about privacy disclosure.

4. Noise environment adaptability is enhanced, and the design of multipath sound transmission makes the invention excellent in noisy environments. Even at an ambient noise of 90dB, the user can still clearly receive the audio content. In contrast, conventional open headphones typically require an increase in volume of 10-15dB under comparable conditions to achieve the same clarity, which can lead to a risk of hearing impairment.

5. Energy efficiency is improved, and energy consumption is saved by about 20-30% compared with the traditional bone conduction scheme under the condition of achieving the same volume due to a more efficient sound transmission mechanism. This means that the service time of the device can be prolonged by 1.5-2 hours under the same battery capacity, and the practicability of the product is remarkably improved.

6. The ambient sound perception capability remains-unlike in-ear solutions, the present invention employs an open design, allowing the user to continuously perceive the sound of the surrounding environment. This is particularly important in outdoor activities, driving etc., greatly improves the safety in use.

7. The technical principle of the invention is not only suitable for glasses, but also can be extended to other wearable devices such as a headband, a hat and the like. This provides a wide space for future product line expansion.

In a word, the invention successfully realizes breakthrough in the aspects of tone quality, comfort, privacy, noise adaptability, energy efficiency and the like through an innovative hybrid conduction technology, and provides a brand-new solution for the audio systems of intelligent glasses and other wearable devices. The technology is expected to bring revolutionary user experience improvement in multiple fields of AR/VR, remote office, sports fitness and the like, and promotes further development of the wearable equipment industry.

Drawings

FIG. 1 is a schematic diagram of four pathways of cartilage conduction at the auricle;

FIG. 2a is a vibrating three-dimensional coordinate system of the present invention;

fig. 2b is a schematic structural view of the X-axis vibration of the bone conduction transducer according to the present invention;

fig. 2c is a schematic diagram of a structure of the bone conduction vibrator according to the present invention vibrating in the Y-axis direction;

fig. 2d is a schematic structural diagram of Z-axis vibration of the bone conduction vibrator according to the present invention;

fig. 2e is a schematic structural diagram of XYZ-axis angular vibration of the bone conduction vibrator according to the present invention;

fig. 2f is a schematic structural view of cartilage mixed conduction spectacles at auricles according to the present invention;

FIG. 3 is a graph showing the monotonic positive correlation between stiffness coefficients k ₂ and m ₁ (g, g) of the dome of the vibrator according to the present invention;

FIG. 4 is a graph showing the relationship between the stiffness coefficients k ₂ and m ₂ (g, g) of the spring plate of the vibrator according to the present invention;

fig. 5 is a schematic view of the structure of the vibration transmission cabin of the present invention located above and behind the auricle;

FIG. 6 is a schematic view of the structure of the vibration transmitting capsule of the present invention behind the auricle;

FIG. 7 is a schematic view of the structure of the vibration transmitting capsule of the present invention located behind and below the auricle;

FIG. 8 is a schematic view of the structure of the vibration transmitting capsule of the present invention above and behind the auricle;

FIG. 9 is a schematic diagram of a vibration model of the present invention when the glasses are worn;

fig. 10 is a schematic diagram of a mechanical vibration model of a two-degree-of-freedom model.

Detailed Description

In order to further describe the technical means and effects adopted by the present invention to achieve the preset purpose, the following detailed description is given with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" means that the embodiments are not necessarily the same. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

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.

The invention will be described in further detail with reference to the drawings and the specific examples.

Referring to fig. 1-10, cartilage-mixed conduction spectacles at auricles, comprising:

a glasses leg 1, wherein a vibration transmission cabin 2 is arranged at the rear half part of the glasses leg 1;

a bone conduction vibrator 3 provided in the vibration transmission chamber 2;

wherein the vibration transmission capsule 2 is designed to contact with the outer side of auricular cartilage when worn;

Wherein the bone conduction vibrator 3 is configured to realize mixed conduction by at least two conduction modes including bone conduction, air conduction and bone conduction-to-air conduction.

Preferably, in one embodiment of the present invention, the vibration transmission chamber 2 is located at the rear half part of the length of the glasses leg 1, and the length of the rear half part is greater than 1/2 of the total length of the glasses leg 1. This design ensures that the vibration transmitting capsule 2 is in sufficient contact with the auricular cartilage to optimize the sound transmission effect.

Preferably, in another embodiment of the present invention, the position where the vibration transmitting capsule 2 contacts the cartilage of the auricle when worn may be selected from at least one of the following positions, the superior lateral side of the auricle/antitragus, the posterior inferior lateral side of the antitragus/antitragus, or the hard bone of the skull behind the ear. The flexible design can adapt to ear types of different users, and improves wearing comfort and universality.

To achieve efficient sound transfer, the hybrid conduction of the present invention includes at least two of the following conduction paths:

1) Auricular cartilage-hard bone conduction pathway;

2) A hard bone conduction path of the retroauricular skull;

3) Auricular cartilage-vibrating air-direct air conduction path;

4) Cartilage-air conduction path in auricular cartilage-ear canal.

The multipath sound transmission mode can fully utilize the anatomical structure of human ears, and improve the definition and loudness of sound. For example, paths 1 and 2 provide good low frequency response using primarily bone conduction principles, while paths 3 and 4 provide improved mid-high frequency response using air conduction principles while further enhancing sound effects using the natural amplification of the middle ear (about 40-55 dB).

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 of the auricle contacting the skin plane or the normal of the skull bone contacting the skin plane behind the ear. This design allows to optimize the vibration direction according to different sound transmission requirements and wearing comfort.

In order to ensure wearing comfort, the precompression of the vibration transmission capsule 2 to the skin at the auricle cartilage is controlled between 0.01N and 0.4N in the invention. This pressure range can ensure good sound conduction effects while avoiding discomfort caused by long wear.

Based on the optimal design of a vibration system, the invention provides a method for calculating the stiffness coefficient of a 3-shrapnel of a bone conduction vibrator. Specifically, the stiffness coefficient k ₂ of the elastic sheet of the bone conduction vibrator 3 satisfies the following relationship:

Wherein k ₁ is the stiffness coefficient of the glasses leg connecting piece for wearing and fixing the vibration transmission cabin 2 and the spring-like system formed by the vibration transmission cabin 2, m ₁ is the earphone head mass ear of the mixed conduction glasses, the earphone head mass comprises the mass of the vibration transmission cabin 2 and the mass of the glasses leg connecting piece part vibrating along with the vibration transmission cabin 2, the mass of the vibration transmission cabin 2 comprises the mass of a stator component of a vibrator, the mass of a spring piece, the mass of a shell structure of the vibration transmission cabin 2, m ₂ is the mass of a rotor component of the mixed conduction vibrator, and omega _t1 and omega _t2 are target resonance frequencies.

Preferably, in one embodiment of the present invention, the stiffness coefficient k ₂ of the elastic sheet of the bone conduction vibrator 3 is in the range of 500-30000N/m. The range is calculated based on a large amount of experimental data and theory, so that the vibrator can achieve the optimal vibration effect under different wearing conditions. The structural details of the bone conduction vibrator 3 are referred to in the patent series 202310979548.4, 202310979551.6, 202310832426.2, 202310979550.1, 202311167359.3, 202310979549.9 of the applicant, and will not be described here.

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

The X axis is the normal direction of a tangential plane perpendicular to the skin of the auricle;

the Y axis is perpendicular to the direction of the X axis towards the rear end of the glasses leg on the axis of the glasses leg;

And Z axis is perpendicular to the X axis and Y axis and is away from the outward direction of the skull.

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, wherein:

0≤α≤90°

0≤β≤90°

0≤γ≤90°。

the definition of the three-dimensional coordinate system can help us to control and optimize the vibration direction of the vibrator more accurately, so as to realize the optimal sound conduction effect.

The invention also innovates in material selection in order to further increase the efficiency of sound conduction and wearing comfort. Preferably, in one embodiment of the present invention, the vibrator fixing structure is made of a material having a high young's modulus. The material can effectively transmit vibration and reduce energy loss. Meanwhile, the skin contact structure is made of a material with skin-friendly property, preferably liquid silica gel. The liquid silica gel not only has good biocompatibility, but also can slightly deform according to the shape of auricles, and the fitting degree and the comfort are improved.

In order to provide a richer audio experience, the invention also designs a scheme of the stereo hybrid conductive glasses. Specifically, the invention comprises a left sound-producing component and a right sound-producing component which can be connected in a wireless or wired mode to form TWS real wireless or stereo mixed conduction glasses. The wireless mode may be selected from at least one of Bluetooth TWS mode, wiFi or other wireless communication modes. If a wired mode is adopted, the left and right temples can be connected through flexible wires.

The glasses of the present invention may also be connected to a host computer, which may be selected from at least one of a smart phone, a computer, a tablet, a watch, or the glasses themselves, in order to accommodate different usage scenarios. The design ensures that the glasses can flexibly adapt to various application scenes, such as music appreciation, video watching, conversation, video conference and the like.

An important characteristic of the invention is its wide application prospect. Cartilage-mixed conduction spectacles at the pinna in accordance with the present invention can be applied to a variety of systems including, but not limited to, audio spectacles systems, wired spectacles systems, wireless spectacles systems, AR spectacles systems, VR spectacles systems, head-mounted systems, wearable device systems, hearing aid systems and sleep aid systems. This varied application possibilities fully embody the technical value and market potential of the present invention.

The cartilage mixed conduction glasses at the auricle have the following remarkable advantages:

1. Sound quality enhancement by multipath mixed conduction the invention can achieve a wider frequency band response. In particular, the performance in the middle and high frequency bands is significantly better than the traditional bone conduction scheme due to the use of the natural amplification of the middle ear. For example, the sound pressure level of the present invention may be increased by 5-10dB over conventional bone conduction schemes in the frequency range of 2000Hz-4000 Hz.

2. Comfort is improved by the fact that the pre-compression force (0.01N-0.4N) required is much less than in conventional hard bone conduction schemes (typically 0.4N-1.5N is required) due to the contact of the vibration transmitting capsule 2 with the auricular cartilage. This means that the user can wear for a long time without feeling uncomfortable. In a user test lasting 8 hours, 95% of the testers indicated that there was no discomfort with the glasses of the present invention.

3. Privacy is improved, in that the required vibration amplitude is reduced instead due to the increase in the overall loudness despite the introduction of the air conduction path. At normal use volume, sound pressure levels outside 1 meter are reduced by about 10-15dB compared to conventional hard bone conduction headphones.

4. The performance in noisy environments is improved because multipath sound transmission is employed, and users can clearly hear audio content even at 90dB of ambient noise. Under equivalent conditions, conventional open headphones typically require an increase in volume of 10-15dB to achieve the same definition.

5. The energy consumption is reduced, and the invention saves about 20-30% of energy consumption compared with the traditional bone conduction scheme under the condition of achieving the same volume thanks to the more efficient sound transmission mode. This means that the use time can be prolonged by 1.5-2 hours at the same battery capacity.

In summary, the present invention skillfully combines the advantages of bone conduction and air conduction through an innovative hybrid conduction approach, while overcoming their respective limitations. The novel hearing-aid system has a breakthrough in technology, more importantly, provides a novel hearing experience mode, and is expected to bring revolutionary reform in emerging fields such as intelligent glasses, AR/VR equipment and the like.

Example 1 basic structural design

As shown in fig. 2a-2f and fig. 5-8, the cartilage mixed conduction glasses at auricles of the present invention mainly comprise glasses legs 1, vibration transmission cabins 2 and bone conduction vibrators 3. The vibration transmission cabin 2 is arranged at the rear half part of the glasses leg 1, and the length of the vibration transmission cabin occupies 60% of the total length of the glasses leg. The bone conduction vibrator 3 is installed inside the vibration transmission cabin 2.

The outer surface of the vibration transmission chamber 2 is designed to be a curved surface attached to the outer side of auricular cartilage so as to ensure the largest contact area. In this embodiment, the contact position of the vibration transmission cabin 2 selects the outer side of the rear upper part of the helix/antitragus, and this position can ensure good sound transmission effect without affecting the overall beauty of the glasses.

Example 2 multipath microphone design

As shown in fig. 1, a core innovation of the present invention is to improve sound quality by using multipath sound transmission. The sound transmission mainly passes through the following four paths:

Path 1 vibrator- > auricular cartilage- > hard bone- > cochlea

Path 2 vibrator- > auricular cartilage- > external auditory canal cartilage- > air in external auditory canal- > tympanic membrane- > middle ear- > cochlea

Path 3 vibrator- > auricle cartilage- > auricle vibration air- > air in external auditory canal- > tympanic membrane- > middle ear- > cochlea

Path 4 vibrator- > behind the ear skull- > cochlea

The advantages of this multipath sound transmission design are:

firstly, the sound signals are transmitted through a plurality of paths, and are overlapped at the inner ear, so that the overall loudness is remarkably improved. According to experimental data, multipath sound transmission can increase the sound pressure level by about 6-8dB at a frequency of 1000Hz compared to a single bone conduction path.

Second, different paths each have advantages for conducting effects at different frequencies. For example, paths 1 and 4 contribute primarily to the low frequency response, while paths 2 and 3 enhance the medium and high frequency response. The complementary effect makes the frequency band response of the invention flatter, and the fluctuation of the frequency response curve is controlled within +/-5 dB in the range of 100Hz-8000 Hz.

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

Example 3 vibration Direction optimization

In order to further optimize the sound conduction effect, the present invention finely designs the vibration direction of the bone conduction vibrator 3. We introduce a three-dimensional coordinate system:

The X axis is the normal direction of a tangential plane perpendicular to the skin of the auricle;

the Y axis is perpendicular to the direction of the X axis towards the rear end of the glasses leg on the axis of the glasses leg;

And Z axis is perpendicular to the X axis and Y axis and is away from the outward direction of the skull.

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, Z axis. Through a number of experiments we have found that the best overall conduction effect is obtained when α=30°, β=60°, γ=90°. With this configuration, the low frequency (< 500 Hz) conduction efficiency is improved by about 20%, while the medium and high frequency (2000 Hz-4000 Hz) conduction efficiency is improved by about 35% compared to conventional unidirectional vibration.

Example 4 vibration System parameter optimization

In order to achieve the best vibration effect, the present invention establishes a two-degree-of-freedom mechanical vibration model, as shown in fig. 9-10. In this model:

The vibration model of the bone conduction glasses when worn is as follows:

The vibration model of the bone conduction vibrator vibration transmission cabin on the auricle when the glasses are worn is as follows:

The vibrator is assumed to be located in the vibration transmission cabin, and the vibration transmission cabin can be attached to the outer side of auricle cartilage or the inner side of auricle. The attached auricle part is the cartilages of the antitragus, the helix or the antitragus. In this case, on the one hand, the cartilage of the auricle forms a support structure for the vibration-transmitting capsule, which can be referred to as a spring-damped vibration system.

At this time, the vibrator outer cylinder is fixed in the vibration transmission cabin in the glasses legs. It is assumed that the earphone head in the temple (vibrator stator + vibration transmitting capsule + connector + mass of the auricle part vibrating together) forms a vibrating mass system m ₁＝m_shell+m_t+m_c＝m_shell+m _{Vibration transmission cabin} +m _{Connecting piece} +m _{Co-vibrating auricle} , where m _shell is equal to the stator assembly mass of the vibrator itself, plus the outer barrel mass of the vibrator itself, plus the spring mass of the vibrator itself. m _t is equal to the mass of the earphone head other than the vibrator itself, including the mass m _{Vibration transmission cabin} of the vibration pod, the mass m _{Connecting piece} of the connection structure. In addition, it is also considered that a part of the mass of the auricle vibrates together with the vibration transmitting chamber, and therefore, the mass m _{Co-vibrating auricle} of the part of the simultaneous vibration auricle needs to be added.

For convenience in description of the following equations, the previous stress diagram is modified into a mechanical vibration model of the following two-degree-of-freedom model.

The vibration equation of the above system can be obtained by stress analysis as follows:

Wherein:

Where f _r is the electromagnetic interaction force between the moving stators.

Solving the vibration equation to obtain an equation corresponding to the system resonant frequency, wherein the equation is as follows:

m₁m₂ω⁴-(k₁m₂+(m₁+m₂)k₂)ω²+k₁k₂＝0

Solving the unitary quadratic equation includes:

From the above, the bone conduction oscillator system has at least two resonance frequency points.

Assuming that the target resonant frequencies of the bone conduction glasses are ω _t1 and ω _t2, the stiffness coefficient k ₂ of the selected spring plate is as follows.

The above formula can be used to reverse the value of the stiffness coefficient of the dome by the target resonant frequency, assuming target resonant frequencies ω _t1 and ω _t2, assuming ω _t1≤ω_t2, then there is:

where it is assumed that k ₁,k₃,m₁,m₂ belongs to the known parameters obtained by measurement, then there are:

it is further possible to calculate:

Can also be solved by the difference between ω _t2 and ω _t1, i.e. there is

The further calculation is as follows:

Further solving the above unitary quadratic equation for k ₂ can also yield the value of k ₂.

From the above, it can be known that if the target resonance frequencies are known to be ω _t1 and ω _t2, and k ₁,m₁,m₂ is assumed to belong to the known parameters obtained by the measurement. Then it can be derived that k ₂ is some function of the above parameters, namely:

k₂＝f(k₁,m₁,m₂,ω_t1,ω_t2)

regarding the value range of k ₂, two typical values of the elastic sheet k ₂ of the bone conduction transducer 3 can be obtained according to the following four cases:

Typical value 1:

Mover mass m ₂ =1.8 g, earphone head mass m ₁＝2g,k₁+k₃ =15 (gf/mm), gram force/mm in stator and glasses leg 1, target low frequency is small assuming that the glasses audio frequency is good, target resonance frequency f _t1 =80 hz, target resonance frequency f _t2 =100 hz;

converted into international standard units, there are:

Mover mass m ₂ = 0.0018kg, stator and temple middle ear head mass m ₁＝0.002kg,k₁+k₃ = 147 (N/m), newton/m, assuming that the eyeglass audio requires a good low frequency, the target low frequency is therefore small. Assuming a target resonance frequency ω _t1＝2πf_t1＝2π*80f_t1 = 502.65, a target resonance frequency ω _t2＝2πf_t2 =2pi×100= 628.32;

It is possible to calculate at this time the time,

Typical value 2:

Mover mass m ₂ = 2g, stator and temple middle ear head mass m ₁＝4g,k₁+k₃ = 15 (gf/mm), gram force/mm, assuming that the spectacles require a low intermediate frequency to be good. Assuming a target resonance frequency f _t1 =450 hz, a target resonance frequency f _t2 =600 hz;

converted into international standard units, there are:

Mover mass m ₂ =0.002 kg, stator and spectacle earpiece mass m ₁＝0.004kg,k₁+k₃ =147 (N/m), newton/m, assuming that the spectacle audio requires a good intermediate frequency. Assuming a target resonance frequency ω _t1＝2πf_t1＝2π*450f_t1 = 2827.43, a target resonance frequency ω _t2＝2πf_t2 =2pi×600= 3769.91;

It is possible to calculate at this time the time,

The stiffness coefficient k ₂ andA monotonic linear positive correlation is formed between the bone conduction glasses and k ₁+k₃, a monotonic linear negative correlation is formed between the bone conduction glasses and k ₁+k₃, a monotonic positive correlation is formed between the bone conduction glasses and m ₁, and a monotonic negative correlation is formed between the bone conduction glasses and m ₂, wherein omega _t1 and omega _t2 are target resonant frequencies of expected designs of the bone conduction glasses or monotonic positive correlation is formed between the stiffness coefficients k ₂ and m ₁ of the elastic sheets.

Preferably, in one embodiment of the present invention, k ₂ has a value in the range of 500-30000N/m. This range is based on a number of experimental and theoretical analyses that can minimize unnecessary shock while ensuring adequate loudness.

This optimized value of k ₂ allows for optimal response characteristics of the vibration system over the target frequency range. Practical tests show that in the frequency range of 400Hz-700Hz, the vibration amplitude is improved by about 25%, and the energy consumption is reduced by about 20%.

Example 5 selection of materials

The invention also innovates in material selection. The vibrator fixing structure adopts titanium alloy material with Young's modulus as high as 210GPa, which ensures that vibration can be efficiently transferred to the skin contact structure.

The skin contact structure adopts medical grade liquid silica gel, and the Shore hardness is 10A. The material not only has excellent biocompatibility, but also can slightly deform according to the auricle shape of each user, and provides optimal fitting degree. Practical tests show that after the liquid silica gel is used, the contact area between the vibration transmission cabin 2 and the auricle is increased by about 40%, and the sound conduction efficiency is improved by about 15%.

Example 6 stereo System design

To provide a richer audio experience, the present invention contemplates a stereo hybrid conductive eyewear system, as shown in FIG. 8. The left and right mixed conduction sounding components are in wireless connection through a Bluetooth 5.2TWS technology, and true stereo audio transmission is supported. Each sound emitting assembly is equipped with its own battery, DAC (digital to analog converter) and power amplifier, ensuring high quality audio playback.

Under the configuration, the system can realize 24bit/96kHz high-resolution audio transmission, the dynamic range reaches 100dB, and the total harmonic distortion plus noise (THD+N) is controlled below 0.1%. Meanwhile, due to the adoption of the efficient Class-D amplifier and the optimized signal processing algorithm, the power consumption of the whole system is only 20mW@1mW output, and continuous playing for 8 hours can be supported.

In addition, the system integrates an adaptive audio processing algorithm. The algorithm can automatically adjust the audio equalization and the volume according to the environmental noise level, and ensure that the optimal listening experience can be obtained under different environments. For example, when ambient noise is detected to exceed 75dB, the system automatically increases the gain in the 1kHz-4kHz band, improving speech intelligibility.

Embodiment 7 application scene display

The cartilage mixed conduction glasses at auricles can be widely applied to various scenes. The following are several typical application cases:

AR eyewear system in which the hybrid conduction technique of the present invention can be perfectly integrated with visual displays. For example, in a navigation application, a user can see navigation information superimposed on an actual scene through glasses while hearing clear voice indications through mixed conduction techniques. Because of the open design, the user can still hear surrounding environment sounds, and the use safety is ensured. The actual measurement shows that under the street noise environment of 80dB, the user can still clearly hear the navigation instruction, and the voice definition score (Speech Intelligibility Score) reaches more than 95%.

2. Conference systems, in video conferencing applications, the glasses of the present invention can provide a high quality audio experience. The binaural stereo design may achieve spatial audio effects, making sound localization in a multi-person conference more accurate. Meanwhile, due to the adoption of the bone conduction technology, sound leakage is greatly reduced, and the privacy of a user is protected. In a test simulating a conference, bystanders outside 1 meter hardly hear any conference content, and the clarity of speech reported by the wearer is comparable to that of a conventional headset.

3. The hearing aid system, the technology of the invention can also be applied to hearing aid devices for patients with mild to moderate hearing loss. Hybrid conduction techniques can bypass some of the problems of the outer and middle ear, delivering sound directly to the inner ear. With the glasses of the present invention, the patient's speech recognition threshold (Speech Reception Threshold) in noisy environments is raised on average by 6dB, which means that they can understand speech at a lower volume.

4. The glasses can provide stable audio experience in sports scenes such as running, riding and the like. While conventional in-ear headphones are prone to falling off during strenuous exercise, the glasses of the present invention can be worn on the head firmly. At the same time, the open design allows the athlete to maintain awareness of the surrounding environment, improving safety. In a test simulating 10 km running, all testers reported that the eyeglasses of the present invention were more stable and comfortable than conventional sports headphones.

The cartilage mixed conduction glasses at the auricle have remarkable industrial practicability:

1. Manufacturing process compatibility the core components of the invention, such as the vibration transmission cabin 2 and the bone conduction vibrator 3, can be realized by the existing precise manufacturing process. For example, the vibration transmission chamber 2 may be manufactured by injection molding, and the bone conduction vibrator 3 may be produced by small-scale modification using an existing micro-speaker production line. This means that the present invention can be rapidly industrialized.

2. Cost effectiveness although the present invention introduces some innovative designs, the increase in overall material and production costs is not significant. Preliminary estimation shows that compared with the traditional bone conduction glasses, the production cost of the invention is increased by no more than 15 percent, but the performance is obviously improved, and the invention has good cost performance.

3. Market potential with the rapid development of AR/VR technology, there is an increasing demand for high quality, comfortable audio solutions. The present invention meets this market need exactly. By 2025, the global AR/VR device market size is expected to reach $1500 billion, with the present invention hopefully taking up a significant share.

4. Expandability the technical principle of the invention is not only applicable to glasses, but also can be extended to other forms of wearable equipment such as headbands, hats and the like. This scalability provides more product line expansion opportunities for the enterprise.

5. Environmental protection factor the materials used in the invention can be mostly recycled. For example, titanium alloys and liquid silicone are both recyclable materials. This meets the current global demand for sustainable development, which is beneficial to long-term development of products.

In summary, the cartilage mixed conduction spectacles at auricles of the present invention are not only technically innovative but also excellent in industrial applicability. It has the potential to become a standard audio solution for the next generation of intelligent wearable devices, providing a better hearing experience for users.

The specific embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Within the scope of the technical idea of the invention, a number of simple variants can be made to the technical solution of the invention, all of which fall within the scope of protection of the invention.

It should be noted that the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the principle of the present invention should be included in the protection scope of the present invention.

Claims (14)

1. Cartilage mixing conduction glasses in auricle, characterized by comprising:

the glasses legs are provided with vibration transmission cabins at the rear half parts;

A bone conduction vibrator provided in the vibration transmission chamber;

wherein the vibration transmission cabin is designed to contact with the outer side of auricular cartilage when worn;

wherein the bone conduction vibrator is configured to realize mixed conduction through at least two conduction modes, wherein the conduction modes comprise bone conduction, air conduction and bone conduction and air conduction.

2. The eyeglass according to claim 1, wherein said vibration transfer compartment is located in a rear half of the length of said temple, and wherein the length of said rear half is greater than 1/2 of the total length of said temple.

3. The eyewear of claim 1, wherein the vibration transfer pod contacts auricular cartilage at a location selected from at least one of:

The external side of the upper part of the helix/antitragus;

the rear upper outer side of the helix/antitragus;

the posterior lateral side of the helix/antitragus;

antitragus/antitragus posterior inferior lateral;

hard bone of the skull behind the ear.

4. The eyewear of claim 1, further comprising:

The oscillator fixing structure is used for fixing the bone conduction oscillator;

the skin contact structure is connected with the vibrator fixing structure;

The vibrator fixing structure transmits vibration to the skin contact structure, the vibrator fixing structure is made of a material with high Young's modulus, and the skin contact structure is made of a material with skin affinity.

5. The eyewear of claim 1, wherein the hybrid conduction comprises at least two of the following conduction paths:

Auricular cartilage-hard bone conduction pathway;

a hard bone conduction path of the retroauricular skull;

Auricular cartilage-vibrating air-direct air conduction path;

cartilage-air conduction path in auricular cartilage-ear canal.

6. The eyeglasses according to claim 1, wherein the vibration direction of the bone conduction vibrator forms an angle of 0 ° to 90 ° with the normal of the auricle-contacting skin plane or the normal of the behind-the-ear skull-contacting skin plane.

7. The spectacles of claim 1, wherein the vibration transfer pod has a pre-pressure of between 0.01N and 0.4N against the skin at the cartilage of the auricle.

8. The eyewear of claim 1, wherein the stiffness coefficient k ₂ of the dome of the bone conduction transducer satisfies the following relationship:

k₂＝f(k₁,m₁,m₂,ω_t1,ω_t2)

Wherein k ₁ is the stiffness coefficient of a spring-like system formed by the earphone head of the glasses leg being worn and fixed on auricle cartilage, m ₁ is the mass of the earphone head in the bone conduction glasses leg, the earphone head comprises a vibration transmission cabin, a connecting structure and an auricle part vibrating together with the vibration transmission cabin, the mass of the vibration transmission cabin comprises the mass of a stator component of the bone conduction vibrator, the mass of a spring sheet, the mass of a shell structure of the vibration transmission cabin, m ₂ is the mass of a rotor component of the bone conduction vibrator, the mass of the earphone head comprises the mass of the vibration transmission cabin, the mass of the connecting structure and the mass of the auricle part vibrating together with the vibration transmission cabin, and omega _t1 and omega _t2 are target resonance frequencies.

9. The eyewear of claim 8, wherein the stiffness coefficient k ₂ of the dome of the bone conduction transducer satisfies the following relationship:

The stiffness coefficient k2 of the elastic sheet of the bone conduction vibrator is 500-30000N/m.

10. The eyewear of claim 9, wherein the spring stiffness coefficient k ₂ andA monotonic linear positive correlation is formed between the bone conduction glasses and k ₁, a monotonic linear negative correlation is formed between the bone conduction glasses and k ₁, a monotonic positive correlation is formed between the bone conduction glasses and m ₁, and a monotonic negative correlation is formed between the bone conduction glasses and m ₂, wherein omega _t1 and omega _t2 are target resonant frequencies of expected designs of the bone conduction glasses or monotonic positive correlation is formed between the stiffness coefficients k ₂ and m ₁ of the elastic sheets.

11. The eyewear of claim 1, further comprising a three-dimensional coordinate system defined as follows:

The X axis is the normal direction of a tangential plane perpendicular to the skin of the auricle;

the Y axis is perpendicular to the direction of the X axis towards the rear end of the glasses leg on the axis of the glasses leg;

the Z axis is perpendicular to the X axis and the Y axis and deviates from the outward direction of the skull;

the vibration central axis direction of the bone conduction vibrator forms three included angles (alpha, beta, gamma) with an X axis, a Y axis and a Z axis, wherein:

0≤α≤90°

0≤β≤90°

0≤γ≤90°。

12. the eyewear of claim 1, further comprising left and right mixed conduction sound emitting assemblies connected by a wireless or wired means forming a TWS true wireless or stereo mixed conduction eyewear, the wireless means selected from at least one of a bluetooth TWS modality, wiFi or other wireless communication means, the wired means comprising connecting left and right temples by a cord.

13. The eyewear of claim 1, further comprising a module connected to a host selected from at least one of a smart phone, a computer, a tablet, a watch, or the eyewear itself.

14. Use of cartilage-mixed conduction spectacles at the auricle, characterized in that the spectacles according to any of claims 1 to 13 are applied to the following devices:

Any one of audio glasses, wired glasses, wireless glasses, AR glasses, VR glasses, head-mounted devices, wearable devices, hearing assistance devices, sleep assistance devices, and industrial safety communication devices.