CN116320948B - A magnetic levitation bone conduction speaker device and a bone conduction hearing aid - Google Patents

Abstract

The invention provides a magnetic suspension bone conduction loudspeaker device and a bone conduction hearing aid, wherein the magnetic suspension bone conduction loudspeaker device comprises a conduction mechanism, a protective cover and an audio coil wound on the circumferential outer side wall of the protective cover; the conduction mechanism comprises a mounting rod, a magnetic assembly and a conduction shell with an inner container, wherein the magnetic assembly comprises a first magnet, a second magnet and a third magnet which is arranged on the mounting rod in a sliding manner, two adjacent magnets are arranged in opposite directions of like magnetic poles, the third magnet is fixedly connected with the inner wall of the conduction shell, the conduction shell can slide along the mounting rod when the third magnet slides relative to the mounting rod, and the protective cover is arranged on the periphery of the conduction shell. According to the magnetic suspension bone conduction loudspeaker device and the bone conduction hearing aid, the magnetic force borne by the two opposite sides of the third magnet is changed, so that vibration is generated, electric signals are converted into mechanical signals, the magnetic suspension bone conduction loudspeaker device and the bone conduction hearing aid have high sensitivity, sound quality is finer, leakage is prevented, and the use experience of a user is improved.

Description

A magnetic levitation bone conduction speaker device and a bone conduction hearing aid

technical field

The invention belongs to the technical field of loudspeakers, and more specifically relates to a magnetic levitation bone conduction speaker device and a bone conduction hearing aid.

Background technique

Bone conduction is a sound conduction method, which converts sound into mechanical vibrations of different frequencies, and transmits sound waves through the human skull, bone labyrinth, inner ear lymph fluid transmission, screw, auditory nerve, and auditory center. Speakers on the market are mainly divided into air conduction speakers and bone conduction speakers; air conduction speakers produce sound through the vibration of the diaphragm, and transmit it to the human ear by means of air transmission; compared with air conduction speakers, the diaphragm drives air vibration to produce sound. Bone conduction vibration speakers need to drive the user's soft tissues and bones to vibrate; bone conduction speakers can convert electrical signals into mechanical vibration signals, and transmit the vibration signals to the cochlea through human tissue and bones, so that users can hear sound.

Bone conduction speakers are widely used in portable listening products such as Bluetooth headsets. When in use, they only need to be worn near the ears with ear hoops, and conduction to the auditory nerve in the human ear through preauricular bone conduction. Since the user does not need to plug the ear canal during use, it can not only reduce the damage to the human eardrum during use, but also open the ear, and other external sounds can be transmitted to the human ear through the air, which is conducive to improving Safety when users wear it outdoors. Bone conduction speakers in the prior art generally use U-shaped irons and magnets for fitting and installation, then install the audio coil fixed on the shrapnel or the base into the gap between the U-shaped iron and the magnet, and generate vibration through the shrapnel. However, this conversion method is limited by shrapnel vibration, which is not conducive to the transmission of low-frequency sound waves. Because low-frequency sound waves are easy to lose and have low efficiency, the user's hearing effect is poor when low-frequency sound waves enter the ear. , The sound leakage is obvious, which affects the user experience.

Contents of the invention

The purpose of the present invention is to provide a magnetic levitation bone conduction speaker device to solve the problem that when the bone conduction speaker in the prior art transmits low-frequency sound waves through the signal conversion method of shrapnel vibration, the low-frequency sound waves are easily lost and the efficiency is low, causing low-frequency sound waves to enter the ear. When the user's hearing effect is poor, the sound leakage is obvious, and it is a technical problem that affects the user's experience.

In order to achieve the above object, the technical solution adopted by the present invention is to provide a magnetic levitation bone conduction speaker device, comprising:

The conduction mechanism, the conduction mechanism includes a mounting rod, a magnetic assembly, and a conduction housing with a liner, the magnetic assembly includes a first magnet and a second magnet respectively arranged at both ends of the installation rod, and a sliding arrangement For the third magnet on the mounting rod, two adjacent magnets are arranged opposite to each other with the same magnetic poles, the first magnet and the third magnet are arranged in the inner tank, and the third magnet is connected to the conductive shell The inner wall of the body is fixedly connected, the side of the conductive housing facing the second magnet is provided with a relief hole for the installation rod to penetrate, and the outer surface of the conductive housing is provided with a hole for abutting against the human body. The conductive surface of the conductive housing can slide along the installation rod when the third magnet slides relative to the installation rod;

a protective cover, the protective cover is installed on the installation rod and located between the second magnet and the third magnet, and the protective cover is arranged on the outer periphery of the conductive shell;

An audio coil, the audio coil is wound on the outer peripheral wall of the protective cover.

In one embodiment, the conduction mechanism further includes a conduction sheet disposed on the inner container, and the conduction sheet is fixedly connected with the third magnet.

In one embodiment, the conductive sheet is a metal composite conductive sheet.

In one embodiment, the transmission mechanism further includes a rolling bearing arranged between the installation rod and the third magnet, the rolling bearing is sleeved on the installation rod and fixedly connected with the third magnet .

In one embodiment, the protective cover is fixedly connected with the second magnet, and the surface of the protective cover is recessed inwardly to form a fixing groove for the second magnet to be inserted into.

In one embodiment, the magnetic levitation bone conduction speaker device further includes a noise reduction coil disposed on the bottom surface of the protective cover, and the noise reduction coil is electrically connected to the audio coil.

In one embodiment, the magnetic levitation bone conduction speaker device further includes a control circuit board arranged on the bottom surface of the protective cover, and the control circuit board is provided with a signal transmission board electrically connected to the noise reduction coil. module.

In one embodiment, the magnetic levitation bone conduction speaker device further includes a battery electrically connected to the noise reduction coil.

In one embodiment, the conduction mechanism further includes a buffer structure fixedly connected to the conduction surface.

The beneficial effect of the magnetic levitation bone conduction speaker device provided by the present invention is that: compared with the prior art, the magnetic levitation bone conduction speaker device of the present invention includes a conduction mechanism, a protective cover, and an audio coil wound on the circumferential outer wall of the protective cover ; The conduction mechanism includes a mounting rod, a magnetic assembly, and a conductive housing with a liner, the magnetic assembly includes a first magnet and a second magnet respectively arranged at both ends of the mounting rod, and a third magnet that is slidably arranged on the mounting rod , the two adjacent magnets are arranged with the same magnetic poles facing each other, and the third magnet is in a suspended state by using the principle of magnetic pole repulsion; the first magnet and the third magnet are arranged in the inner tank, and the third magnet is fixedly connected with the inner wall of the conductive shell. The side of the conductive housing facing the second magnet is provided with a relief hole for the installation rod to penetrate, and the outer surface of the conductive housing is provided with a conductive surface for abutting against the human body, and the conductive housing can be installed opposite to the third magnet. When the rod slides, it slides along the installation rod, the protective cover is installed on the installation rod and is located between the second magnet and the third magnet, and the protective cover is arranged on the outer periphery of the conductive shell. When the magnetic levitation bone conduction speaker device is in the shutdown state, the opposite sides of the third magnet are respectively subjected to the magnetic force of the first magnet and the magnetic force of the second magnet, so that the third magnet is in a state of force balance, thereby restricting the relative installation of the third magnet The rod slides; when the magnetic levitation bone conduction speaker device is turned on, the audio coil receives an electric signal, which changes the magnetic force on the opposite sides of the third magnet, so that the force on the third magnet is unbalanced, and along the installation rod Slide between the first magnet and the second magnet, and then drive the conductive housing to slide along the installation rod, realize the conversion of electrical signals into mechanical signals, and use the conductive surface of the conductive housing to transmit the mechanical signals to the auditory nerve of the human body, so that the user Hear voices. Since the protective cover is set on the outer periphery of the conduction shell, during the operation of the magnetic levitation bone conduction speaker device, when the third magnet slides under force and drives the conduction shell to move, the audio coil will receive the force in the opposite direction and drive the protection The cover vibrates, so that vibration waveforms in opposite directions are formed between the conductive shell and the protective cover, which is conducive to eliminating sound leakage and improving the user's hearing experience. The magnetic levitation bone conduction speaker device generates vibration by changing the magnetic force on the opposite sides of the third magnet, and realizes the conversion of electrical signals into mechanical signals. The user's sense of hearing effect, the sound quality is more delicate, prevents sound leakage, and improves the user experience; at the same time, it can prevent the displacement of the third magnet from exceeding the maximum when the magnetic levitation bone conduction speaker device is subjected to a large impact during use. Amplitude, collision with the inner wall of the conduction shell will cause damage, which is beneficial to prolong the service life of the magnetic levitation bone conduction speaker device; and the structure of the magnetic levitation bone conduction speaker device is simple, which is conducive to increasing its scope of application and is suitable for different shapes bone conduction hearing aids.

The purpose of the present invention is to provide a bone conduction hearing aid to solve the problem that the bone conduction speaker of the bone conduction hearing aid in the prior art transmits low-frequency sound waves through the signal conversion method of shrapnel vibration. The user's hearing effect is poor when it is in the ear, and the sound leakage is obvious, which is a technical problem that affects the user's experience.

In order to achieve the above object, the technical solution adopted by the present invention is: to provide a bone conduction hearing aid, comprising the above-mentioned magnetic levitation bone conduction speaker device.

The beneficial effects of the bone conduction hearing aid provided by the present invention are: compared with the prior art, the bone conduction hearing aid of the present invention includes the above-mentioned magnetic levitation bone conduction speaker device; when the magnetic levitation bone conduction speaker device is in a shutdown state, the third magnet The opposite sides are respectively subjected to the magnetic force of the first magnet and the magnetic force of the second magnet, so that the third magnet is in a state of force balance, thereby limiting the sliding of the third magnet relative to the installation rod; when the magnetic levitation bone conduction speaker device is turned on, the audio frequency The coil receives the electric signal, so that the magnetic force on the opposite sides of the third magnet changes, so that the force of the third magnet is unbalanced, and slides along the installation rod between the first magnet and the second magnet, and then drives the conductive shell The body slides along the installation rod to convert electrical signals into mechanical signals, and use the conduction surface of the conduction shell to transmit the mechanical signals to the auditory nerve of the human body, so that the user can hear the sound. Since the protective cover is set on the outer periphery of the conduction shell, during the operation of the magnetic levitation bone conduction speaker device, when the third magnet slides under force and drives the conduction shell to move, the audio coil will receive the force in the opposite direction and drive the protection The cover vibrates, so that vibration waveforms in opposite directions are formed between the conductive shell and the protective cover, which is conducive to eliminating sound leakage and improving the user's hearing experience. The bone conduction hearing aid equipped with the above-mentioned magnetic levitation bone conduction speaker device generates vibration by changing the magnetic force on the opposite sides of the third magnet, and realizes the conversion of electrical signals into mechanical signals. It has the characteristics of high sensitivity and improves the efficiency of vibration use. Effectively improve the user's hearing effect when low-frequency sound waves enter the ear, the sound quality is more delicate, prevent sound leakage, and improve the user's experience; at the same time, it can prevent the magnetic levitation bone conduction speaker device from being damaged by the third magnet when it is subjected to a large impact during use. The generated displacement exceeds the maximum amplitude, and it collides with the inner wall of the conduction shell to cause damage, which is beneficial to prolong the service life of the bone conduction hearing aid.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without paying creative efforts.

Fig. 1 is a schematic cross-sectional structure diagram of a magnetic levitation bone conduction speaker device provided by an embodiment of the present invention;

Fig. 2 is a partial cross-sectional structural schematic diagram of the conduction mechanism of the magnetic levitation bone conduction speaker device provided by the embodiment of the present invention;

Fig. 3 is a side view structural schematic diagram 1 of the magnetic assembly provided by the embodiment of the present invention;

Fig. 4 is a side view structural schematic diagram II of the magnetic assembly provided by the embodiment of the present invention;

Fig. 5 is a schematic top view structure diagram of the third magnet and the rolling bearing provided by the embodiment of the present invention.

Wherein, each reference sign in the figure:

1. Conduction mechanism; 11. Mounting rod; 12. Magnetic assembly; 121. First magnet; 122. Second magnet; 123. Third magnet; 13. Conductive housing; , rolling bearing; 16, buffer structure; 2, protective cover; 3, audio coil; 4, noise reduction coil; 5, control circuit board.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device Or elements must have a certain orientation, be constructed and operate in a certain orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

Please refer to Fig. 1 to Fig. 4 together, a magnetic levitation bone conduction speaker device provided by an embodiment of the present invention includes a conduction mechanism 1, a protective cover 2 and an audio coil 3 wound on the circumferential outer wall of the protective cover 2; The transmission mechanism 1 includes a mounting rod 11, a magnetic assembly 12, and a conductive housing 13 with an inner container 131. The magnetic assembly 12 includes a first magnet 121 and a second magnet 122 respectively arranged at two ends of the mounting rod 11, and a sliding arrangement For the third magnet 123 on the installation rod 11, the adjacent two magnets are arranged with the same magnetic poles facing each other, and the third magnet 123 is in a suspended state by using the principle of magnetic pole homosexual repulsion; the first magnet 121 and the third magnet 123 are arranged in the inner tank 131, the third magnet 123 is fixedly connected to the inner wall of the conduction housing 13, the side of the conduction housing 13 facing the second magnet 122 is provided with a relief hole for the installation rod 11 to penetrate, and the outer surface of the conduction housing 13 is set There is a conductive surface for abutting against the human body, and the conductive shell 13 can slide along the installation rod 11 when the third magnet 123 slides relative to the installation rod 11. The protective cover 2 is installed on the installation rod 11 and is located between the second magnet 122 and the second magnet 122. Between the three magnets 123 , the protective cover 2 is set on the outer periphery of the conducting shell 13 . When the magnetic levitation bone conduction speaker device is in the shutdown state, the opposite sides of the third magnet 123 are respectively subjected to the magnetic force of the first magnet 121 and the magnetic force of the second magnet 122, so that the third magnet 123 is in a force balance state, thereby limiting the third magnet 123. The three magnets 123 slide relative to the mounting rod 11; when the magnetic levitation bone conduction speaker device is in the power-on state, the audio coil 3 receives an electric signal, so that the magnetic force on the opposite sides of the third magnet 123 changes, thereby making the third magnet 123 123 is unbalanced in force, and slides between the first magnet 121 and the second magnet 122 along the installation rod 11, and then drives the conductive housing 13 to slide along the installation rod 11, realizing the conversion of electrical signals into mechanical signals, and using the conductive housing The conduction surface of 13 conducts the mechanical signal to the auditory nerve of the human body, so that the user can hear the sound. Since the protective cover 2 is set on the outer periphery of the conduction shell 13, during the operation of the magnetic levitation bone conduction speaker device, when the third magnet 123 slides under force and drives the conduction shell 13 to move, the audio coil 3 will be subjected to force in the opposite direction. The acting force drives the protective cover 2 to vibrate, so that vibration waveforms in opposite directions are formed between the conductive shell 13 and the protective cover 2, which is beneficial to eliminate sound leakage and improve the user's hearing experience. The magnetic levitation bone conduction speaker device generates vibration by changing the magnetic force on the opposite sides of the third magnet 123, and realizes the conversion of electrical signals into mechanical signals. Improve the user's hearing effect, the sound quality is more delicate, prevent sound leakage, and improve the user experience; at the same time, it can prevent the displacement generated by the third magnet 123 when the magnetic levitation bone conduction speaker device is subjected to a large impact during use. If the maximum amplitude is exceeded, it will collide with the inner wall of the conduction shell 13 and cause damage, which is beneficial to prolong the service life of the magnetic levitation bone conduction speaker device; and the structure of the magnetic levitation bone conduction speaker device is simple, which is conducive to increasing its scope of application. Bone conduction hearing aids in different shapes.

Please refer to Figures 1 to 2 together. As a specific implementation of the magnetic levitation bone conduction speaker device provided by the embodiment of the present invention, the conduction mechanism 1 of the magnetic levitation bone conduction speaker device also includes a conduction sheet arranged in the inner tank 131 14. The conductive sheet 14 is fixedly connected to the third magnet 123. By setting the conductive sheet 14 on the third magnet 123, the third magnet 123 vibrates under the driving action of the audio coil 3. Resonance effect is generated between them, so as to achieve the mechanical vibration effect of amplifying low-frequency sound waves, which is conducive to improving the sensitivity of the magnetic levitation bone conduction speaker device, effectively improving the user's hearing effect when low-frequency sound waves enter the ear, and the sound quality is more delicate, improving the user experience. Here, the connection method between the conductive sheet 14 and the third magnet 123, and the material of the conductive sheet 14 are not limited; optionally, a detachable connection or a non-detachable connection can be used between the conductive sheet 14 and the third magnet 123. Connection method; preferably, adhesive connection is used between the conductive sheet 14 and the third magnet 123 , or the conductive sheet 14 is fixed on the third magnet 123 with an interference fit, which is convenient for assembly and production.

Optionally, the conduction sheet 14 is a metal composite material conduction sheet 14, and the metal composite material conduction sheet 14 is a conduction sheet 14 made of a plastic material, and its surface is provided with a metal coating, which has the characteristics of light weight and is beneficial to the third magnet. 123 produces a resonance effect, thereby amplifying the mechanical vibration effect of low-frequency sound waves, thereby improving the hearing effect of the user when the low-frequency sound waves enter the ear, and improving the user experience.

Please refer to Fig. 1, Fig. 2 and Fig. 5 together. In this embodiment, the conduction mechanism 1 of the magnetic levitation bone conduction speaker device also includes a rolling bearing 15 arranged between the installation rod 11 and the third magnet 123, and the rolling bearing 15 sets It is arranged on the mounting rod 11 and fixedly connected with the third magnet 123, and the rolling bearing 15 is fixedly connected to the penetration hole of the third magnet 123 by setting a penetration hole for the mounting rod 11 to penetrate through the third magnet 123. and the rolling bearing 15 fixedly connected to the third magnet 123 is sleeved on the installation rod 11, which can effectively reduce the friction force suffered by the third magnet 123 when sliding on the installation rod 11, and is beneficial to ensure the transmission mechanism 1 Sensitivity makes the sound quality transmitted by the magnetic levitation bone conduction speaker device more delicate.

Optionally, the transmission mechanism 1 also includes a buffer structure 16 that is fixedly connected to the conduction surface. By setting the buffer structure 16 on the conduction surface, it can effectively buffer the impact of the mechanical signal transmitted to the human body by the transmission mechanism, which is beneficial to improve user The comfort when worn and used can increase the friction between the conduction shell 13 and the human skin at the same time, so that it can be firmly adsorbed near the ear and not easy to slip, which is beneficial to prolong the service life of the magnetic levitation bone conduction speaker device. Improve user experience. The specific structure and material of the buffer structure 16 are not limited here; optionally, the buffer structure 16 is a buffer colloid fixedly connected to the conductive surface, which has a simple structure and is convenient for assembly and production.

Please refer to Fig. 1 further. In this embodiment, the protective cover 2 of the magnetic levitation bone conduction speaker device is fixedly connected with the second magnet 122, and the surface of the protective cover 2 is sunken inward to form a fixing groove for the second magnet 122 to be inserted into. , by fixing the second magnet 122 to the end of the mounting rod 11, the protective cover 2 is arranged between the second magnet 122 and the third magnet 123, and the second magnet 122 is partially inserted into the fixing groove of the protective cover 2 , and the protective cover 2 is fixedly connected with the second magnet 122, so as to quickly position the protective cover 2 and install it on the preset position on the installation rod 11, and make the protective cover 2 cover the outer periphery of the conductive shell 13, which is convenient for assembly and production and because the protective cover 2 covers the outer periphery of the conduction housing 13, during the operation of the magnetic levitation bone conduction loudspeaker device, when the third magnet 123 is forced to slide and drives the conduction housing 13 to move, the audio coil 3 will be subjected to the opposite The force in the direction drives the protective cover 2 to vibrate, so that a vibration waveform in the opposite direction is formed between the conductive shell 13 and the protective cover 2, which is beneficial to eliminate sound leakage and improve the user's hearing experience.

Optionally, the magnetic levitation bone conduction speaker device also includes a noise reduction coil 4 arranged on the bottom surface of the protective cover 2, the noise reduction coil 4 is electrically connected to the audio coil 3, and the noise reduction coil 4 is installed on the bottom surface of the protective cover 2 It is located below the third magnet 123 and is used to reduce environmental noise. The noise reduction coil 4 is used to achieve active noise reduction, prevent sound leakage, and improve the user's hearing experience.

Optionally, the magnetic levitation bone conduction speaker device also includes a storage battery electrically connected to the noise reduction coil 4. When the third magnet 123 vibrates under the driving action of the audio coil 3, the noise reduction coil 4 is in the magnetic field of the third magnet 123. During the movement of cutting the magnetic induction line, a current is generated and sent to the battery electrically connected to the noise reduction coil 4 to charge the battery, which is conducive to improving the battery life of the magnetic levitation bone conduction speaker device.

Optionally, the magnetic levitation bone conduction speaker device also includes a control circuit board 5 arranged on the bottom surface of the protective cover 2. The control circuit board 5 is provided with a signal transmission module electrically connected to the noise reduction coil 4. When the magnetic levitation bone conduction speaker When the sound device is worn by the user's ear and is in a shutdown state, due to the high sensitivity of the magnetic levitation bone conduction speaker device, it can use the pulse of the body's limbs to drive the transmission mechanism 1 to vibrate, and pass the mechanical vibration signal of the transmission mechanism 1 through the noise reduction coil 4 is converted into an electrical signal, and the signal transmission module on the control circuit board 5 electrically connected to the noise reduction coil 4 transmits the electrical signal to the mobile terminal, and the user can detect his own heart rate according to the data fed back by the magnetic levitation bone conduction speaker device, The function of the magnetic levitation bone conduction speaker device is made more diversified, which is conducive to improving user experience.

The embodiment of the present invention also provides a bone conduction hearing aid, which includes the above-mentioned magnetic levitation bone conduction speaker device; The magnetic force and the magnetic force of the second magnet 122 make the third magnet 123 in a state of force balance, thereby limiting the sliding of the third magnet 123 relative to the installation rod 11; signal, so that the magnetic force on the opposite sides of the third magnet 123 changes, so that the force on the third magnet 123 is out of balance, and slides along the installation rod 11 between the first magnet 121 and the second magnet 122, thereby driving the conduction The casing 13 slides along the installation rod 11 to convert electrical signals into mechanical signals, and use the conductive surface of the conductive casing 13 to transmit the mechanical signals to the auditory nerve of the human body so that the user can hear the sound. Since the protective cover 2 is set on the outer periphery of the conduction shell 13, during the operation of the magnetic levitation bone conduction speaker device, when the third magnet 123 slides under force and drives the conduction shell 13 to move, the audio coil 3 will be subjected to force in the opposite direction. The acting force drives the protective cover 2 to vibrate, so that vibration waveforms in opposite directions are formed between the conductive shell 13 and the protective cover 2, which is beneficial to eliminate sound leakage and improve the user's hearing experience. The bone conduction hearing aid equipped with the above-mentioned magnetic levitation bone conduction speaker device changes the magnetic force on the opposite sides of the third magnet 123 to generate vibration, realizes the conversion of electrical signals into mechanical signals, has the characteristics of high sensitivity, and improves the efficiency of vibration use , effectively improve the user's hearing effect when low-frequency sound waves enter the ear, the sound quality is more delicate, prevent sound leakage, and improve the user experience; at the same time, it can prevent the magnetic levitation bone conduction speaker device from being subjected to a large impact during use, and the third The displacement generated by the magnet 123 exceeds the maximum amplitude and collides with the inner wall of the conduction housing 13 to cause damage, which is beneficial to prolong the service life of the bone conduction hearing aid.

The above is only a preferred embodiment of this embodiment, and is not intended to limit this embodiment. Any modifications, equivalent replacements and improvements made within the spirit and principles of this embodiment should be included in this embodiment. Within the protection scope of the embodiment.

Claims (9)

1. A magnetic levitation bone conduction speaker apparatus, comprising:

the conduction mechanism comprises a mounting rod, a magnetic assembly and a conduction shell with an inner container, wherein the magnetic assembly comprises a first magnet and a second magnet which are respectively arranged at two ends of the mounting rod, and a third magnet which is arranged on the mounting rod in a sliding manner, two adjacent magnets are arranged in opposite directions of like magnetic poles, the first magnet and the third magnet are arranged in the inner container, the third magnet is fixedly connected with the inner wall of the conduction shell, a yielding hole for the mounting rod to penetrate is formed in one side of the conduction shell, facing the second magnet, of the conduction shell, a conduction surface for abutting against a human body is arranged on the outer surface of the conduction shell, and the conduction shell can slide along the mounting rod when the third magnet slides relative to the mounting rod;

the protective cover is arranged on the mounting rod and positioned between the second magnet and the third magnet, and is arranged on the periphery of the conductive shell in a covering way;

the audio coil is wound on the circumferential outer side wall of the protective cover;

the noise reduction coil is arranged on the bottom surface of the protective cover and is electrically connected with the audio coil.

2. A magnetic levitation bone conduction speaker apparatus as defined in claim 1, wherein: the conduction mechanism further comprises a conduction sheet arranged on the inner container, and the conduction sheet is fixedly connected with the third magnet.

3. A magnetic levitation bone conduction speaker apparatus as defined in claim 2, wherein: the conducting sheet is made of metal composite material.

4. A magnetic levitation bone conduction speaker apparatus as defined in claim 1, wherein: the conduction mechanism further comprises a rolling bearing arranged between the mounting rod and the third magnet, and the rolling bearing is sleeved on the mounting rod and fixedly connected with the third magnet.

5. A magnetic levitation bone conduction speaker apparatus as defined in claim 1, wherein: the protection casing with second magnet fixed connection, the surface of protection casing inwards sunken be formed with the confession the fixed slot that the second magnet was put into.

6. A magnetic levitation bone conduction speaker apparatus as defined in claim 1, wherein: the magnetic suspension bone conduction loudspeaker device further comprises a control circuit board arranged on the bottom surface of the protective cover, and a signal transmission module electrically connected with the noise reduction coil is arranged on the control circuit board.

7. A magnetic levitation bone conduction speaker apparatus as defined in claim 1, wherein: the magnetic suspension bone conduction speaker device further comprises a storage battery electrically connected with the noise reduction coil.

8. A magnetic levitation bone conduction speaker apparatus as defined in claim 1, wherein: the conductive mechanism further includes a cushioning structure fixedly attached to the conductive surface.

9. A bone conduction hearing aid, characterized by: a magnetic levitation bone conduction speaker apparatus comprising any of claims 1 to 8.