Bone conduction earphone piezoelectric vibrator structure and bone conduction earphone thereof

Abstract

The invention provides a bone conduction earphone piezoelectric vibrator structure and a bone conduction earphone thereof, and belongs to the technical field of bone conduction sound transmission. Comprising a piezoelectric vibrator, one end of the piezoelectric vibrator is connected with a damping structure, the other end of the piezoelectric vibrator is connected with a mass block, the damping structure comprises a clamping block, a micro-channel is arranged in the clamping block, flexible containing cavities are formed in the two ends of the micro-channel respectively, and the containing cavities and the micro-channel are filled with non-Newtonian fluid. And the accommodating cavity and the micro-channel form a U shape and are clamped on the piezoelectric vibrator. The non-Newtonian fluid piezoelectric vibrator has the advantages that the resonant frequency of the piezoelectric vibrator can be adaptively adjusted under different frequency signals through the non-Newtonian fluid.

Description

Technical Field

[0001] The present invention belongs to the technical field of bone conduction sound transmission, and relates to a bone conduction earphone, and in particular to a bone conduction earphone piezoelectric vibrator structure and the bone conduction earphone. Background Art

[0002] The sound is converted into mechanical vibrations of different frequencies, and the sound waves are transmitted through the human skull, bony labyrinth, inner ear lymph, cochlea, and auditory center. That is, the sound source generates vibrations, which are transmitted to the part of the earphone that contacts the human ear, such as the temporal bone, and then transmitted to the inner ear through the skull, stimulating the inner ear auditory nerve. The auditory nerve converts the vibrations into electrical signals, which are transmitted to the brain through the auditory nerve, and the brain processes them to produce auditory perception.

[0003] The core component of bone conduction headphones is the vibration unit, which usually uses a piezoelectric ceramic vibrator as the vibration unit of bone conduction headphones. It uses the positive and negative piezoelectric effects of piezoelectric ceramics to quickly generate mechanical deformation when the driving voltage is loaded, thereby causing vibration, achieving efficient conversion of electrical signals to mechanical vibrations, and accurately converting audio signals into vibration signals that can be conducted through bones. It has the characteristics of many layers and thin thickness, which can enhance the bone conduction vibration effect, maintain good sound quality when transmitting low-frequency sound effects, and make the volume and texture of the sound consistent with the original sound quality; the mid-frequency has a large resolution, good density and subtle dynamic presentation; the high-frequency brightness is healthy, upright, bright and open without sharpness, clean and balanced.

[0004] However, piezoelectric ceramic vibration units usually have a limited vibration frequency range and are relatively difficult to generate high-frequency and low-frequency vibrations. The vibration frequency range that can be covered is limited. This may result in the inability to fully present the details and richness of the original audio when restoring some high-frequency-rich music or sounds, affecting the integrity of the sound quality. Summary of the invention

[0005] The purpose of the present invention is to provide a piezoelectric vibrator structure for a bone conduction earphone in view of the above problems.

[0006] Another object of the present invention is to provide a bone conduction earphone for the above-mentioned piezoelectric vibrator.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: the piezoelectric vibrator structure of the bone conduction earphone includes a piezoelectric vibrator, one end of the piezoelectric vibrator is connected to the damping structure, and the other end is connected to the mass block, the damping structure includes a clamping block, a microchannel is arranged in the clamping block, flexible accommodating cavities are respectively arranged at both ends of the microchannel, and the accommodating cavity and the microchannel are filled with non-Newtonian fluid, and the accommodating cavity and the microchannel form a U-shape clamped on the piezoelectric vibrator.

[0008] In the above-mentioned bone conduction earphone piezoelectric vibrator structure, the non-Newtonian fluid flows in the microchannel and is a shear thickening fluid, and its rheological properties change with the vibration frequency.

[0009] In the above-mentioned piezoelectric vibrator structure of the bone conduction earphone, the microchannel forms a damping channel, and when the piezoelectric vibrator vibrates, the accommodating cavities at both ends of the microchannel squeeze the accommodating cavities so that the non-Newtonian fluid tends to flow in the microchannel.

[0010] In the above-mentioned piezoelectric vibrator structure of the bone conduction earphone, during low-frequency vibration, the non-Newtonian fluid is in a fluid state and passes through the microchannel, the resistance at the clamping point of the piezoelectric vibrator is small, the resonant frequency of the piezoelectric vibrator is small, and the resistance increases with increasing frequency; during medium-frequency vibration, the non-Newtonian fluid is in a fluid-solid coupling state and passes through the microchannel, the resistance at the clamping point of the piezoelectric vibrator is large, the resonant frequency of the piezoelectric vibrator is moderate, and the resistance increases with increasing frequency; during high-frequency vibration, the non-Newtonian fluid is in a solid state and cannot pass through the microchannel, the resistance at the clamping point of the piezoelectric vibrator is large, the resonant frequency of the piezoelectric vibrator is large, and the resistance increases with increasing frequency.

[0011] In the above-mentioned bone conduction earphone piezoelectric vibrator structure, the clamping block includes a clamping body, the clamping body is concave-shaped, the end of the piezoelectric vibrator away from the mass block is arranged in the concave part of the clamping body, and the microchannel is arranged along the clamping body and surrounds the end of the piezoelectric vibrator in a U shape.

[0012] In the above-mentioned bone conduction earphone piezoelectric vibrator structure, the clamping block is fixedly connected to the shell covering the outside of the piezoelectric vibrator.

[0013] In the above-mentioned bone conduction earphone piezoelectric vibrator structure, two elastic blocks are arranged on the inner side of the clamping body recess, the accommodating cavity is arranged in the elastic block, and the two elastic blocks are respectively arranged on both sides of the vibration direction of the piezoelectric vibrator and clamped by the U-shaped side wall of the clamping body.

[0014] In the above-mentioned bone conduction earphone piezoelectric vibrator structure, the elastic block is made of silicone, the elastic block is provided with an open accommodating cavity near the concave bottom of the clamping body, the accommodating cavity and the concave bottom of the clamping body are fitted to form a sealed state, the two ends of the microchannel are connected to the opening of the accommodating cavity and communicate with the two accommodating cavities, the clamping body includes a first body and a second body, the first body and the second body are in a 7 shape and are symmetrically arranged and spliced ​​into a concave shape, the microchannel is arranged in the first body and the second body in a 7 shape and spliced ​​into a U shape, In the above-mentioned bone conduction earphone piezoelectric vibrator structure, the piezoelectric vibrator includes a substrate, piezoelectric sheets are arranged on both sides of the substrate, and one end of the substrate away from the clamping block is fixedly connected to the mass block.

[0015] The bone conduction earphone adopts the above-mentioned bone conduction earphone piezoelectric vibrator structure, and the bone conduction piezoelectric vibrator structure is arranged in the bone speaker.

[0016] Compared with the existing technology, the advantages of the present invention are: the piezoelectric vibrator is able to adaptively adjust the resonant frequency under different frequency signals through non-Newtonian fluid, making the low-frequency sound full and layered, and the restoration of the mid-frequency human voice and the fundamental tones of most musical instruments is extremely accurate, the sound is round and full, and the risk of the piezoelectric vibrator losing control under high-frequency, small-amplitude, rapid vibration is effectively suppressed, ensuring that high-frequency details such as the treble strings of the violin and the sound of birds can be displayed delicately and crisply. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the bone conduction earphone provided by the present invention.

[0018] Figure 2 The figure is a schematic diagram of the piezoelectric vibrator structure provided by the present invention.

[0019] Figure 3 It is a schematic diagram of the accommodating cavity and microchannel structure provided by the present invention.

[0020] Figure 4 The present invention provides a cross-sectional display of a piezoelectric vibrator.

[0021] In the figure, a piezoelectric vibrator 1, a damping structure 2, a mass block 3, a clamping block 4, a microchannel 5, a containing cavity 6, a non-Newtonian fluid 7, a clamping body 8, a shell 9, an elastic block 10, a piezoelectric sheet 11, and a substrate 12 are provided. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1-Figure 3 As shown, the piezoelectric vibrator structure of the bone conduction earphone includes a piezoelectric vibrator 1, one end of the piezoelectric vibrator 1 is connected to a damping structure 2, and the other end is connected to a mass block 3, the damping structure 2 includes a clamping block 4, a microchannel 5 is arranged in the clamping block 4, flexible accommodating cavities 6 are respectively arranged at both ends of the microchannel 5, and the accommodating cavity 6 and the microchannel 5 are filled with a non-Newtonian fluid 7, the accommodating cavity 6 and the microchannel 5 form a U-shaped clamp on the piezoelectric vibrator 1, and the U-shaped clamping ensures all-round wrapping of the piezoelectric vibrator 1, uniform force, and effectively avoids damage to the piezoelectric vibrator caused by local stress concentration.

[0024] When the piezoelectric vibrator 1 receives an input electrical signal, the piezoelectric vibrator 1 vibrates with different amplitudes and frequencies due to receiving signals of different frequencies, and then transmits the vibrations to the non-Newtonian fluid 7 through the flexible accommodating cavity 6. The non-Newtonian fluid 7 therefore exhibits different states, causing the clamping block 4 to have different clamping forces, thereby ultimately achieving the effect of changing the resonant frequency of the piezoelectric vibrator, so that the bone conduction earphones can obtain good sound quality in the low and high frequency bands.

[0025] In this embodiment, the accommodating chamber 6 is flexible. When the non-Newtonian fluid 7 is a fluid, the accommodating chamber 6 is easily changed in shape by the vibrating piezoelectric vibrator 1, that is, the vibration damping of the piezoelectric vibrator 1 is small. When the non-Newtonian fluid 7 is a solid, the accommodating chamber 6 is supported by the non-Newtonian fluid 7 and is not easily changed in shape by the vibrating piezoelectric vibrator 1, that is, the vibration damping of the piezoelectric vibrator 1 is large.

[0026] For example, in the low frequency band, due to the lack of damping that can be flexibly adjusted according to the low frequency vibration, the piezoelectric vibrator 1 is prone to excessive vibration. This is because there is no appropriate resistance to suppress its amplitude, which may make the low frequency response appear "booming", that is, the low frequency sound is turbid and unclear, and it is impossible to accurately restore low frequency sound effects such as deep drums and bass sounds, resulting in a lack of musical layering.

[0027] In the mid-frequency part, without non-Newtonian fluids that change damping in time with increasing frequency, it is difficult for the piezoelectric vibrator to stabilize at a resonant frequency that matches the mid-frequency. The resonant frequency may shift, causing distortion in the restoration of the mid-frequency human voice and the fundamental tones of most musical instruments. The mid-frequency sound heard by the user will become dry and lack fullness, affecting the expression of musical emotions and the clarity of voice calls.

[0028] The problem is more prominent in the high frequency band. There is no mechanism to quickly increase damping at high frequencies, and the piezoelectric vibrator is very likely to lose control due to high-frequency, small-amplitude rapid vibration. This will cause high-frequency distortion, and high-frequency details such as the high-pitched strings of a violin and the sound of birds cannot be presented delicately, and even sharp and harsh noises will be generated, giving users a very poor hearing experience.

[0029] Preferably, the non-Newtonian fluid 7 flows in the microchannel 5 and is a shear-thickening fluid, and its rheological properties change from fluid to solid as the vibration frequency increases. This enables the damping structure to have automatic adjustment capabilities at different vibration frequencies of the piezoelectric vibrator 1. During low-frequency vibration, the fluid viscosity is low, allowing the piezoelectric vibrator to vibrate relatively freely to restore rich low-frequency sound effects; as the frequency increases, the viscosity increases, and excessive vibrations are suppressed in a timely manner to accurately match the mid-frequency and high-frequency audio requirements. This adaptive change allows the headphones to achieve excellent frequency response in the entire frequency band, and both exciting rock and melodious classical music can be presented in their original form.

[0030] Furthermore, the microchannel 5 forms a damping channel, and when the piezoelectric vibrator 1 vibrates, the accommodating chambers 6 at both ends of the microchannel 5 squeeze the accommodating chambers 6 so that the non-Newtonian fluid 7 has a tendency to flow in the microchannel 5. When the piezoelectric vibrator 1 vibrates, the squeezing action of the accommodating chamber 6 is closely linked with the vibration of the piezoelectric vibrator, realizing instant driving of the flow of the non-Newtonian fluid 7. This dynamic process ensures the timeliness and accuracy of the damping adjustment, allowing the piezoelectric vibrator 1 to obtain just the right damping support at every moment, maintain stable resonance, avoid audio distortion, and make the sound output smooth and natural.

[0031] During low-frequency vibration, the non-Newtonian fluid 7 is in a fluid state and passes through the microchannel 5. The resistance at the clamping point of the piezoelectric vibrator 1 is small, the resonant frequency of the piezoelectric vibrator 1 is small, and the resistance increases with the increase of frequency; during medium-frequency vibration, the non-Newtonian fluid 7 is in a fluid-solid coupling state and passes through the microchannel 5. The resistance at the clamping point of the piezoelectric vibrator 1 is large, the resonant frequency of the piezoelectric vibrator 1 is moderate, and the resistance increases with the increase of frequency; during high-frequency vibration, the non-Newtonian fluid 7 is in a solid state and cannot pass through the microchannel 5. The resistance at the clamping point of the piezoelectric vibrator 1 is large, the resonant frequency of the piezoelectric vibrator 1 is large, and the resistance increases with the increase of frequency. This fluid state and damping effect that changes dynamically according to frequency perfectly realizes the precise adaptation of audio in different frequency bands. The low-frequency band guarantees deep and full sound effects, the mid-frequency band restores the mellow human voice and instrument fundamental tone, the high-frequency band eliminates broken sounds and presents delicate details, and the full-band synergy creates an immersive audio experience for users as if they were on the scene.

[0032] In the low frequency band, when the audio signal is in a lower frequency range, such as 20Hz - 200Hz, the non-Newtonian fluid 7 exhibits a relatively low viscosity. As a shear thickening fluid, it can intelligently adjust the damping according to the low-frequency vibration amplitude and frequency. At this time, during the vibration of the piezoelectric vibrator 1, the non-Newtonian fluid flows relatively smoothly in the microchannel, so that the resistance at the clamping point is moderate, which neither excessively suppresses the vibration of the piezoelectric vibrator nor effectively avoids its excessive oscillation. This enables the headphones to accurately restore low-frequency sound effects such as deep drums and bass sounds, making the low-frequency sound full and layered, and the user feels as if they are personally on the scene and feel the strong low-frequency shock.

[0033] Entering the intermediate frequency range, about 200Hz - 2000Hz, as the frequency increases, the rheological properties of the non-Newtonian fluid 7 change, and gradually transform into a fluid-solid coupling state. This state change just increases the damping of the piezoelectric vibrator, stabilizing it at the resonance frequency that adapts to the intermediate frequency. In this way, the restoration of the intermediate frequency human voice and the fundamental tone of most musical instruments is extremely accurate, and the sound is round and full. Whether it is the emotional transmission of the singer's voice when enjoying music, or the clear presentation of the other party's voice when making a voice call, it can be excellently guaranteed.

[0034] In the high frequency band, that is, above 2000Hz, the non-Newtonian fluid 7 is almost in a solid state under high-frequency vibration, which greatly increases the resistance at the clamping point of the piezoelectric vibrator. This feature effectively suppresses the risk of the piezoelectric vibrator losing control under high-frequency, small-amplitude, rapid vibration, ensuring that high-frequency details such as violin treble strings and bird calls can be displayed delicately and crisply, eliminating the phenomenon of high-frequency distortion, and bringing users a rich and clear high-frequency auditory enjoyment.

[0035] Non-Newtonian fluid can play a buffering and balancing role by virtue of its own characteristics. On the one hand, it absorbs part of the impact force, prevents external force from directly impacting the piezoelectric vibrator, and prevents it from displacement and loosening; on the other hand, even if the piezoelectric vibrator is disturbed to a certain extent, the dynamic adjustment of the non-Newtonian fluid can prompt it to quickly return to a stable vibration state, ensuring that it always maintains a good contact state with the clamping block. This not only ensures the stability of audio signal transmission and allows continuous and stable sound output, but also significantly reduces component wear, greatly extends the service life of the headphones, and enables the headphones to operate reliably in various dynamic scenarios.

[0036] Preferably, the clamping block 4 includes a clamping body 8, the clamping body 8 is concave, the end of the piezoelectric vibrator 1 away from the mass block 3 is arranged in the concave part of the clamping body 8, and the microchannel 5 is arranged along the clamping body 8 and surrounds the end of the piezoelectric vibrator 1 in a U shape. The concave clamping body 8 provides a stable mounting base for the piezoelectric vibrator 1, ensuring that its position is stable during the vibration process and will not easily shift or shake. The U-shaped microchannel 5 not only makes full use of the space, but also ensures uniform damping control of the end of the piezoelectric vibrator 1, optimizes the vibration energy transmission, improves the audio conversion efficiency, and makes the earphone sound more efficient and stable.

[0037] Furthermore, the clamping block 4 is fixedly connected to the shell 9 covering the outside of the piezoelectric vibrator 1. The damping structure 2 is tightly combined with the shell 9, making it difficult for external interference forces to penetrate into the core vibration area where the piezoelectric vibrator 1 is located, effectively shielding adverse effects such as external vibrations and collisions, ensuring that the piezoelectric vibrator 1 vibrates stably at a predetermined frequency, and ensuring the purity and stability of the audio output.

[0038] Two elastic blocks 10 are arranged inside the recess of the clamping body 8, and the accommodating cavity 6 is arranged in the elastic block 10. The two elastic blocks 10 are respectively arranged on both sides of the vibration direction of the piezoelectric vibrator 1 and clamped by the U-shaped side wall of the clamping body 8. The addition of the elastic block 10 adds more flexible buffering to the structure. On the one hand, it protects the accommodating cavity 6 from damage due to excessive extrusion, ensuring the stable storage and flow of the non-Newtonian fluid 7; on the other hand, when the piezoelectric vibrator 1 vibrates, the elastic block 10 can absorb part of the lateral impact force, avoiding the piezoelectric vibrator 1 from being offset or damaged due to uneven lateral force, thereby ensuring the stability and continuity of audio transmission.

[0039] Preferably, the elastic block 10 is made of silicone, and the elastic block 10 is provided with an open accommodating chamber 6 near the concave bottom of the clamping body 8, and the accommodating chamber 6 is fitted with the concave bottom of the clamping body 8 to form a sealed state, and the two ends of the microchannel 5 are connected to the opening of the accommodating chamber 6 and communicate with the two accommodating chambers 6, and the clamping body 8 includes a first body and a second body, and the first body and the second body are 7-shaped and symmetrically arranged and spliced ​​into a concave shape, and the microchannel 5 is arranged in the first body and the second body in a 7-shaped shape and spliced ​​into a U-shape. The elastic block 10 made of silicone has many advantages such as high elasticity, anti-aging, and good biocompatibility, ensuring long-term and stable use. The unique sealing structure design effectively prevents the leakage of the non-Newtonian fluid 7 and ensures the reliable operation of the damping system. The design of the clamping body 8 and the microchannel 5 spliced ​​in the 7-shaped splicing is not only convenient for manufacturing and assembly, but also optimizes the space utilization and force distribution, improves the mechanical properties of the overall structure, and lays a solid foundation for the high-performance operation of the earphone.

[0040] Preferably, the piezoelectric vibrator 1 includes a substrate 12, piezoelectric sheets are arranged on both sides of the substrate 12, and one end of the substrate 12 away from the clamping block 4 is fixedly connected to the mass block 3. The layered structural design optimizes the functional realization of the piezoelectric vibrator 1. The piezoelectric sheets 11 on both sides serve as vibration excitation sources, which can efficiently convert electrical signals into mechanical vibrations. The substrate 12 plays a supporting and conducting role, and evenly transmits the vibration to the entire structure. The fixed connection with the mass block 3 further optimizes the resonance characteristics, and cooperates with the damping structure 2 to achieve accurate conversion and output of audio signals, bringing high-quality auditory enjoyment to users.

[0041] The present invention adopts a bone conduction earphone with a piezoelectric vibrator structure, and the bone conduction earphone is provided with the bone conduction piezoelectric vibrator structure in a bone speaker.

[0042] The bone conduction earphones built on the above exquisite structure integrate all the structural advantages. The piezoelectric vibrator structure is precisely arranged in the bone speaker to give full play to its advantages such as accurate frequency response, stable structure, and strong environmental adaptability, so as to create a bone conduction earphone that can provide excellent audio experience in various scenarios for users, whether it is sports and fitness, outdoor travel or daily office work, you can enjoy clear, stable and high-quality sound.

[0043] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0044] Although this article uses more terms such as piezoelectric vibrator 1, damping structure 2, mass block 3, clamping block 4, microchannel 5, accommodating chamber 6, non-Newtonian fluid 7, clamping body 8, shell 9, elastic block 10, piezoelectric sheet 11, substrate 12, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A piezoelectric vibrator structure for a bone conduction earphone, characterized in that: The invention comprises a piezoelectric vibrator (1), one end of the piezoelectric vibrator (1) is connected to a damping structure (2), and the other end is connected to a mass block (3), the damping structure (2) comprises a clamping block (4), a microfluidic channel (5) is arranged in the clamping block (4), flexible accommodating cavities (6) are arranged at both ends of the microfluidic channel (5), and the accommodating cavities (6) and the microfluidic channel (5) are filled with a non-Newtonian fluid (7), and the accommodating cavities (6) and the microfluidic channel (5) form a U-shape clamped on the piezoelectric vibrator (1).

2. The piezoelectric vibrator structure of the bone conduction earphone according to claim 1, characterized in that: The non-Newtonian fluid (7) flows in the microchannel (5) and is a shear-thickening fluid whose rheological properties change with the vibration frequency.

3. The piezoelectric vibrator structure of the bone conduction earphone according to claim 2, characterized in that: The microchannel (5) forms a damping channel, and when the piezoelectric vibrator (1) vibrates, the accommodating cavities (6) at both ends of the microchannel (5) squeeze the accommodating cavities (6) so that the non-Newtonian fluid (7) has a tendency to flow in the microchannel (5).

4. The piezoelectric vibrator structure of the bone conduction earphone according to claim 3, characterized in that: During low-frequency vibration, the non-Newtonian fluid (7) is in a fluid state and passes through the microchannel (5), the resistance at the clamping point of the piezoelectric vibrator (1) is small, the resonant frequency of the piezoelectric vibrator (1) is small, and the resistance increases with increasing frequency; during medium-frequency vibration, the non-Newtonian fluid (7) is in a fluid-solid coupling state and passes through the microchannel (5), the resistance at the clamping point of the piezoelectric vibrator (1) is large, the resonant frequency of the piezoelectric vibrator (1) is moderate, and the resistance increases with increasing frequency; during high-frequency vibration, the non-Newtonian fluid (7) is in a solid state and cannot pass through the microchannel (5), the resistance at the clamping point of the piezoelectric vibrator (1) is large, the resonant frequency of the piezoelectric vibrator (1) is large, and the resistance increases with increasing frequency.

5. The piezoelectric vibrator structure of the bone conduction earphone according to claim 3, characterized in that: The clamping block (4) comprises a clamping body (8), the clamping body (8) is in a concave shape, the end of the piezoelectric vibrator (1) away from the mass block (3) is arranged in a concave portion of the clamping body (8), and the microchannel (5) is arranged along the clamping body (8) and surrounds the end of the piezoelectric vibrator (1) in a U shape.

6. The piezoelectric vibrator structure of the bone conduction earphone according to claim 5, characterized in that: The clamping block (4) is fixedly connected to a housing (9) enclosing the outside of the piezoelectric vibrator (1).

7. The piezoelectric vibrator structure of the bone conduction earphone according to claim 5, characterized in that: Two elastic blocks (10) are arranged inside the recess of the clamping body (8), the accommodating cavity (6) is arranged in the elastic block (10), and the two elastic blocks (10) are respectively arranged on both sides of the vibration direction of the piezoelectric vibrator (1) and are clamped by the U-shaped side wall of the clamping body (8).

8. The piezoelectric vibrator structure of the bone conduction earphone according to claim 7, characterized in that: The elastic block (10) is made of silicone. The elastic block (10) is provided with an open accommodating cavity (6) near the concave bottom of the clamping body (8). The accommodating cavity (6) and the concave bottom of the clamping body (8) are fitted to form a sealed state. Both ends of the microchannel (5) are connected to the openings of the accommodating cavity (6) and communicate with the two accommodating cavities (6). The clamping body (8) includes a first body and a second body. The first body and the second body are in a 7-shape and are symmetrically arranged and spliced ​​into a concave shape. The microchannel (5) is arranged in the first body and the second body in a 7-shape and spliced ​​into a U-shape.

9. The piezoelectric vibrator structure of the bone conduction earphone according to claim 8, characterized in that: The piezoelectric vibrator (1) comprises a substrate (12), piezoelectric sheets (11) are arranged on both sides of the substrate (12), and one end of the substrate (12) away from the clamping block (4) is fixedly connected to the mass block (3).

10. A bone conduction earphone using the bone conduction earphone piezoelectric vibrator structure according to any one of claims 1 to 9, characterized in that: The bone conduction piezoelectric vibrator structure is arranged in the bone speaker.

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