CN116320948B - Magnetic suspension bone conduction speaker and bone conduction hearing aid - Google Patents
Magnetic suspension bone conduction speaker and bone conduction hearing aid Download PDFInfo
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- CN116320948B CN116320948B CN202310597577.4A CN202310597577A CN116320948B CN 116320948 B CN116320948 B CN 116320948B CN 202310597577 A CN202310597577 A CN 202310597577A CN 116320948 B CN116320948 B CN 116320948B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
- H04R2225/43—Signal processing in hearing aids to enhance the speech intelligibility
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
Technical Field
The invention belongs to the technical field of speakers, and particularly relates to a magnetic suspension bone conduction speaker device and a bone conduction hearing aid.
Background
Bone conduction is a sound conduction mode, namely, sound is converted into mechanical vibration with different frequencies, and sound waves are transmitted through skull bones, bone labyrinth, inner ear lymph fluid transmission, a screw, auditory nerves and auditory centers of people. The speakers on the market are mainly divided into an air conduction speaker and a bone conduction speaker; the air conduction loudspeaker generates sound through the vibration of the vibrating diaphragm and conducts the sound to human ears in an air propagation mode; the bone conduction vibration loudspeaker is required to drive soft tissues and bones of a user to vibrate; the bone conduction speaker can convert the electric signal into a mechanical vibration signal and conduct the vibration signal into the cochlea through human tissues and bones, so that the user can hear the sound.
Bone conduction loudspeaker is widely used in portable listening products such as bluetooth headset, only need wear near the ear with the earring when using, through the auditory nerve in the preceding bone conduction of ear to people. Because the user need not to plug the ear canal in the use, not only can reduce and cause the injury to people's eardrum membrane in the use, can make the ear obtain opening simultaneously, and other external sound can be conducted to people's ear through the mode of air propagation, is favorable to promoting the security of user when wearing the use outdoors. In the prior art, after the U-shaped iron and the magnet are installed in an adaptive manner, an audio coil fixed on the elastic sheet or the base is installed in a gap between the U-shaped iron and the magnet, and an electric signal is converted into a mechanical vibration signal in a mode that the elastic sheet generates vibration; however, the conversion mode is limited by the vibration of the elastic sheet, which is not beneficial to the transmission of low-frequency sound waves, and the low-frequency sound waves are easy to consume and low in efficiency, so that the hearing effect of a user is poor when the low-frequency sound waves enter the ear, the leakage sound is obvious, and the use experience of the user is influenced.
Disclosure of Invention
The invention aims to provide a magnetic suspension bone conduction loudspeaker device, which solves the technical problems that when a bone conduction loudspeaker in the prior art transmits low-frequency sound waves through a signal conversion mode of elastic piece vibration, the hearing effect of a user is poor, sound leakage is obvious and the use experience of the user is affected due to low consumption efficiency of the low-frequency sound waves.
In order to achieve the above purpose, the invention adopts the following technical scheme: provided is a magnetic levitation bone conduction speaker including:
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, 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.
In one embodiment, the conducting mechanism further comprises a conducting piece arranged on the inner container, and the conducting piece is fixedly connected with the third magnet.
In one embodiment, the conductive sheet is a metal composite conductive sheet.
In one embodiment, 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.
In one embodiment, the protection cover is fixedly connected with the second magnet, and a fixing groove for placing the second magnet is formed in an inward concave manner on the surface of the protection cover.
In one embodiment, the magnetic levitation bone conduction speaker device further comprises a noise reduction coil disposed on the bottom surface of the protective cover, and the noise reduction coil is electrically connected with the audio coil.
In one embodiment, the magnetic suspension bone conduction speaker 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.
In one embodiment, the magnetic levitation bone conduction speaker further comprises a battery electrically connected to the noise reduction coil.
In one embodiment, the conductive mechanism further comprises a cushioning structure fixedly attached to the conductive surface.
The magnetic suspension bone conduction loudspeaker device provided by the invention has the beneficial effects that: compared with the prior art, 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 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, wherein two adjacent magnets are arranged in opposite directions of like magnetic poles, and the third magnet is in a suspension state by utilizing the principle of like magnetic pole repulsion; the first magnet and the third magnet set up in the inner bag, and the inner wall fixed connection of third magnet and conduction casing, one side of conduction casing towards the second magnet has been seted up and has been supplied the hole of stepping down that the installation pole penetrated, and the surface of conduction casing is provided with the conduction face that is used for with human butt, and the conduction casing can be when the relative installation pole of third magnet slides along the installation pole, and the protection casing is installed on the installation pole and is located between second magnet and the third magnet, and the periphery at the conduction casing is established to the protection casing cover. When the magnetic suspension bone conduction speaker device is in a stop 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 stress balance state, and the third magnet is limited to slide relative to the mounting rod; when the magnetic suspension bone conduction loudspeaker device is in a starting-up state, the audio coil receives an electric signal, so that magnetic forces borne by two opposite sides of the third magnet are changed, the third magnet is unbalanced in stress and slides between the first magnet and the second magnet along the mounting rod, the conduction shell is driven to slide along the mounting rod, the electric signal is converted into a mechanical signal, and the mechanical signal is conducted to an acoustic nerve of a human body by utilizing a conduction surface of the conduction shell, so that a user hears sound. Because the protection casing cover is established in the periphery of conduction casing, in magnetic suspension bone conduction speaker operation in-process, when third magnet atress slides and drives the conduction casing and remove, audio coil can receive opposite direction effort and drive the protection casing vibration for form the opposite direction vibration waveform between conduction casing and the protection casing, be favorable to eliminating the leakage sound, promote user's hearing impression. The magnetic suspension bone conduction loudspeaker device generates vibration by changing the magnetic force born by the two opposite sides of the third magnet, realizes the conversion of an electric signal into a mechanical signal, has the characteristic of high sensitivity, improves the vibration use efficiency, effectively improves the hearing effect of a user when a low-frequency sound wave enters the ear, has finer tone quality, prevents the occurrence of sound leakage, and improves the use experience of the user; meanwhile, when the magnetic suspension bone conduction loudspeaker device is subjected to larger impact in the use process, the displacement generated by the third magnet exceeds the maximum amplitude and collides with the inner wall of the conduction shell to cause damage, so that the service life of the magnetic suspension bone conduction loudspeaker device is prolonged; and the magnetic suspension bone conduction loudspeaker device has a simple structure, is beneficial to enlarging the application range, and is suitable for bone conduction hearing aids with different shapes.
The invention aims to provide a bone conduction hearing aid, which solves the technical problems that when a bone conduction loudspeaker of the bone conduction hearing aid transmits low-frequency sound waves through a signal conversion mode of elastic piece vibration in the prior art, the hearing effect of a user is poor, the sound leakage is obvious and the use experience of the user is affected due to the fact that the low-frequency sound waves are easy to consume and low in efficiency.
In order to achieve the above purpose, the invention adopts the following technical scheme: there is provided a bone conduction hearing aid comprising a magnetic levitation bone conduction speaker as described above.
The bone conduction hearing aid provided by the invention has the beneficial effects that: compared with the prior art, the bone conduction hearing aid comprises the magnetic suspension bone conduction loudspeaker device; when the magnetic suspension bone conduction speaker device is in a stop 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 stress balance state, and the third magnet is limited to slide relative to the mounting rod; when the magnetic suspension bone conduction loudspeaker device is in a starting-up state, the audio coil receives an electric signal, so that magnetic forces borne by two opposite sides of the third magnet are changed, the third magnet is unbalanced in stress and slides between the first magnet and the second magnet along the mounting rod, the conduction shell is driven to slide along the mounting rod, the electric signal is converted into a mechanical signal, and the mechanical signal is conducted to an acoustic nerve of a human body by utilizing a conduction surface of the conduction shell, so that a user hears sound. Because the protection casing cover is established in the periphery of conduction casing, in magnetic suspension bone conduction speaker operation in-process, when third magnet atress slides and drives the conduction casing and remove, audio coil can receive opposite direction effort and drive the protection casing vibration for form the opposite direction vibration waveform between conduction casing and the protection casing, be favorable to eliminating the leakage sound, promote user's hearing impression. The bone conduction hearing aid with the magnetic suspension bone conduction hearing device generates vibration by changing the magnetic force born by the two opposite sides of the third magnet, realizes conversion of an electric signal into a mechanical signal, has the characteristic of high sensitivity, improves the vibration use efficiency, effectively improves the hearing effect of a user when a low-frequency sound wave enters the ear, ensures finer tone quality, prevents the occurrence of sound leakage, and improves the use experience of the user; meanwhile, when the magnetic suspension bone conduction loudspeaker device is subjected to larger impact in the use process, the displacement quantity generated by the third magnet exceeds the maximum amplitude and collides with the inner wall of the conduction shell to cause damage, so that the service life of the bone conduction hearing aid is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic cross-sectional structure diagram of a magnetic levitation bone conduction speaker according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a partially cross-sectional structure of a conductive mechanism of a magnetic levitation bone conduction speaker according to an embodiment of the present invention;
FIG. 3 is a schematic side view of a magnetic assembly according to an embodiment of the present invention;
FIG. 4 is a schematic side view of a magnetic assembly according to an embodiment of the present invention;
fig. 5 is a schematic top view of a third magnet and a rolling bearing according to an embodiment of the present invention.
Wherein, each reference sign in the figure:
1. a conduction mechanism; 11. a mounting rod; 12. a magnetic assembly; 121. a first magnet; 122. a second magnet; 123. a third magnet; 13. a conductive housing; 131. an inner container; 14. a conductive sheet; 15. a rolling bearing; 16. a buffer structure; 2. a protective cover; 3. an audio coil; 4. a noise reduction coil; 5. and a control circuit board.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can 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 be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1 to 4, the magnetic levitation bone conduction speaker according to the embodiment of the present invention includes a conduction mechanism 1, a shield 2, and an audio coil 3 wound around a circumferential outer wall of the shield 2; the conduction mechanism 1 comprises a mounting rod 11, a magnetic component 12 and a conduction shell 13 with an inner container 131, wherein the magnetic component 12 comprises a first magnet 121 and a second magnet 122 which are respectively arranged at two ends of the mounting rod 11, and a third magnet 123 which is arranged on the mounting rod 11 in a sliding manner, the two adjacent magnets are arranged in opposite directions of like magnetic poles, and the third magnet 123 is in a suspension state by utilizing the principle of like magnetic poles repelling; the first magnet 121 and the third magnet 123 set up in the inner bag 131, the inner wall fixed connection of third magnet 123 and conduction casing 13, the hole of stepping down that supplies installation pole 11 to pierce through is offered to one side of conduction casing 13 towards second magnet 122, the surface of conduction casing 13 is provided with the conduction face that is used for with the human butt, conduction casing 13 can slide along installation pole 11 when the relative installation pole 11 of third magnet 123 slides, protection casing 2 is installed on installation pole 11 and is located between second magnet 122 and the third magnet 123, protection casing 2 cover is established at the periphery of conduction casing 13. When the magnetic levitation bone conduction speaker is in a stop 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 stress balance state, and the third magnet 123 is limited to slide relative to the mounting rod 11; when the magnetic suspension bone conduction speaker device is in a starting-up state, the audio coil 3 receives an electric signal, so that magnetic forces borne by two opposite sides of the third magnet 123 are changed, the third magnet 123 is unbalanced in stress and slides between the first magnet 121 and the second magnet 122 along the mounting rod 11, the conductive shell 13 is driven to slide along the mounting rod 11, the electric signal is converted into a mechanical signal, and the mechanical signal is transmitted to an acoustic nerve of a human body by using a conductive surface of the conductive shell 13, so that a user hears sound. Because the protection casing 2 cover is established in the periphery of conduction casing 13, in magnetic suspension bone conduction speaker operation in-process, when third magnet 123 atress slides and drives conduction casing 13 and remove, audio coil 3 can receive opposite direction effort and drive protection casing 2 vibration for form the opposite direction vibration waveform between conduction casing 13 and the protection casing 2, be favorable to eliminating the leakage sound, promote user's hearing impression. The magnetic suspension bone conduction speaker device generates vibration by changing the magnetic force born by the two opposite sides of the third magnet 123, realizes the conversion of an electric signal into a mechanical signal, has the characteristic of high sensitivity, improves the vibration use efficiency, effectively improves the hearing effect of a user when a low-frequency sound wave enters the ear, has finer tone quality, prevents the occurrence of sound leakage, and improves the use experience of the user; meanwhile, when the magnetic levitation bone conduction speaker is subjected to larger impact in the use process, the displacement generated by the third magnet 123 exceeds the maximum amplitude and collides with the inner wall of the conduction shell 13 to cause damage, so that the service life of the magnetic levitation bone conduction speaker is prolonged; and the magnetic suspension bone conduction loudspeaker device has a simple structure, is beneficial to enlarging the application range, and is suitable for bone conduction hearing aids with different shapes.
Referring to fig. 1 to 2 together, as a specific implementation manner of the magnetic levitation bone conduction speaker device provided by the embodiment of the invention, the conduction mechanism 1 of the magnetic levitation bone conduction speaker device further includes a conductive sheet 14 disposed on the inner container 131, the conductive sheet 14 is fixedly connected with the third magnet 123, and the conductive sheet 14 is disposed on the third magnet 123, so that a resonance effect is generated between the third magnet 123 and the conductive sheet 14 in a process of generating vibration under the driving action of the audio coil 3, thereby realizing a mechanical vibration effect of amplifying low-frequency sound waves, being beneficial to improving the sensitivity of the magnetic levitation bone conduction speaker device, effectively improving the hearing effect of a user when the low-frequency sound waves enter the ear, and improving the use experience of the user. The connection between the conductive sheet 14 and the third magnet 123, and the material of the conductive sheet 14 are not limited; alternatively, the conductive sheet 14 and the third magnet 123 may be detachably connected or non-detachably connected; preferably, the conductive sheet 14 and the third magnet 123 are connected by adopting adhesive, or the conductive sheet 14 is fixed on the third magnet 123 by interference fit, so that the assembly production is facilitated.
Optionally, the conducting strip 14 is a metal composite conducting strip 14, the metal composite conducting strip 14 is a conducting strip 14 made of plastic, and a metal coating is arranged on the surface of the metal composite conducting strip 14, so that the metal composite conducting strip has the characteristic of light weight, is favorable for generating a resonance effect with the third magnet 123, and further amplifies the mechanical vibration effect of the low-frequency sound wave, and further improves the hearing effect of a user when the low-frequency sound wave enters the ear, and improves the use experience of the user.
Referring to fig. 1, 2 and 5, in the present embodiment, the conduction mechanism 1 of the magnetic levitation bone conduction speaker device further includes a rolling bearing 15 disposed between the mounting rod 11 and the third magnet 123, the rolling bearing 15 is sleeved on the mounting rod 11 and is fixedly connected with the third magnet 123, the rolling bearing 15 is fixedly connected in the penetrating hole of the third magnet 123 by penetrating the penetrating hole of the mounting rod 11 through the penetrating hole of the third magnet 123, and the rolling bearing 15 fixedly connected on the third magnet 123 is sleeved on the mounting rod 11, so that the friction force applied when the third magnet 123 slides on the mounting rod 11 can be effectively reduced, the sensitivity of the conduction mechanism 1 is guaranteed, and the sound quality transmitted by the magnetic levitation bone conduction speaker device is finer.
Optionally, the conduction mechanism 1 further includes a buffer structure 16 fixedly connected to the conduction surface, and by providing the buffer structure 16 on the conduction surface, the impact of the mechanical signal transmitted to the human body by the transmission mechanism can be effectively buffered, so that the comfort of the user wearing the conduction mechanism is improved, and meanwhile, the friction between the conduction shell 13 and the skin of the human body can be increased, so that the conduction mechanism can be firmly adsorbed near the ears, is not easy to slide off, is beneficial to prolonging the service life of the magnetic suspension bone conduction speaker device, and improves the user experience. The specific structure and material of the buffer structure 16 are not limited herein; optionally, the buffering structure 16 is a buffering colloid fixedly connected to the guiding surface, and is simple in structure and convenient to assemble and produce.
Referring to fig. 1, in the present embodiment, a protection cover 2 of the magnetic levitation bone conduction speaker device is fixedly connected with a second magnet 122, a fixing groove for the second magnet 122 to be placed is formed in an inward recess on the surface of the protection cover 2, the protection cover 2 is arranged between the second magnet 122 and a third magnet 123 by fixedly connecting the second magnet 122 to the end of the installation rod 11, the second magnet 122 is partially placed in the fixing groove of the protection cover 2, and the protection cover 2 is fixedly connected with the second magnet 122, so that the protection cover 2 is quickly positioned and installed at a preset position on the installation rod 11, and the protection cover 2 is covered on the periphery of the conduction shell 13, thereby facilitating assembly and production; and because the protection casing 2 cover is established in the periphery of conduction casing 13, in magnetic suspension bone conduction speaker operation in-process, when third magnet 123 atress slides and drives conduction casing 13 and remove, audio coil 3 can receive opposite direction effort and drive protection casing 2 vibration for form the opposite direction vibration waveform between conduction casing 13 and the protection casing 2, be favorable to eliminating the leakage sound, promote user's hearing impression.
Optionally, the magnetic suspension bone conduction speaker device further includes a noise reduction coil 4 disposed on the bottom surface of the protection cover 2, and the noise reduction coil 4 is electrically connected with the audio coil 3, and is used for reducing environmental noise by mounting the noise reduction coil 4 on the bottom surface of the protection cover 2 and below the third magnet 123, and by using the noise reduction coil 4, active noise reduction is realized, leakage is prevented, and hearing feeling of a user is improved.
Optionally, the magnetic suspension bone conduction speaker device further includes a 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 makes a motion of cutting the magnetic induction line in the magnetic field of the third magnet 123, so that current is generated and conveyed to the battery electrically connected to the noise reduction coil 4, charging of the battery is achieved, and the endurance of the magnetic suspension bone conduction speaker device is improved.
Optionally, the magnetic levitation bone conduction speaker device further comprises a control circuit board 5 arranged on the bottom surface of the protective cover 2, a signal transmission module electrically connected with the noise reduction coil 4 is arranged on the control circuit board 5, when the magnetic levitation bone conduction speaker device is worn by a user at the edge of the ear and is in a shutdown state, the magnetic levitation bone conduction speaker device has high sensitivity, the limb pulse of a human body can be utilized to drive the conduction mechanism 1 to vibrate, a mechanical vibration signal of the conduction mechanism 1 is converted into an electric signal through the noise reduction coil 4, the electric signal is transmitted to the mobile terminal by the signal transmission module electrically connected with the noise reduction coil 4 on the control circuit board 5, and the user can detect the heart rate of the user according to the data fed back by the magnetic levitation bone conduction speaker device, so that the magnetic levitation bone conduction speaker device has more diversified functions and is beneficial to improving user experience.
The embodiment of the invention also provides a bone conduction hearing aid, which comprises the magnetic suspension bone conduction loudspeaker device; when the magnetic levitation bone conduction speaker is in a stop 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 stress balance state, and the third magnet 123 is limited to slide relative to the mounting rod 11; when the magnetic suspension bone conduction speaker device is in a starting-up state, the audio coil 3 receives an electric signal, so that magnetic forces borne by two opposite sides of the third magnet 123 are changed, the third magnet 123 is unbalanced in stress and slides between the first magnet 121 and the second magnet 122 along the mounting rod 11, the conductive shell 13 is driven to slide along the mounting rod 11, the electric signal is converted into a mechanical signal, and the mechanical signal is transmitted to an acoustic nerve of a human body by using a conductive surface of the conductive shell 13, so that a user hears sound. Because the protection casing 2 cover is established in the periphery of conduction casing 13, in magnetic suspension bone conduction speaker operation in-process, when third magnet 123 atress slides and drives conduction casing 13 and remove, audio coil 3 can receive opposite direction effort and drive protection casing 2 vibration for form the opposite direction vibration waveform between conduction casing 13 and the protection casing 2, be favorable to eliminating the leakage sound, promote user's hearing impression. The bone conduction hearing aid with the magnetic suspension bone conduction hearing aid device generates vibration by changing the magnetic force born by the two opposite sides of the third magnet 123, realizes conversion of an electric signal into a mechanical signal, has the characteristic of high sensitivity, improves the vibration use efficiency, effectively improves the hearing effect of a user when a low-frequency sound wave enters the ear, ensures finer tone quality, prevents leakage and improves the use experience of the user; meanwhile, when the magnetic suspension bone conduction loudspeaker device is subjected to larger impact in the use process, the displacement generated by the third magnet 123 exceeds the maximum amplitude, and the magnetic suspension bone conduction loudspeaker device collides with the inner wall of the conduction shell 13 to cause damage, so that the service life of the bone conduction hearing aid is prolonged.
The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention, but any modifications, equivalents, improvements, etc. within the spirit and principles of the present invention should be included in the protection scope of the present invention.
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.
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| CN202310597577.4A CN116320948B (en) | 2023-05-25 | 2023-05-25 | Magnetic suspension bone conduction speaker and bone conduction hearing aid |
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| CN202310597577.4A CN116320948B (en) | 2023-05-25 | 2023-05-25 | Magnetic suspension bone conduction speaker and bone conduction hearing aid |
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| CN116320948A CN116320948A (en) | 2023-06-23 |
| CN116320948B true CN116320948B (en) | 2023-08-18 |
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| JP2008092460A (en) * | 2006-10-04 | 2008-04-17 | Namiki Precision Jewel Co Ltd | Bone conduction speaker |
| CN201263212Y (en) * | 2008-07-28 | 2009-06-24 | 杨胜忠 | Magnetic levitation oscillation loudspeaker module |
| CN201766481U (en) * | 2010-08-09 | 2011-03-16 | 友泰讯科(北京)科技有限公司 | Miniature vibrator, portable electronic device and electric massage tool |
| RU162586U1 (en) * | 2016-02-03 | 2016-06-20 | Общество с ограниченной ответственностью "СЕВЕРО-ЗАПАДНЫЙ ЦЕНТР ТРАНСФЕРА ТЕХНОЛОГИЙ" | AUTONOMOUS INDUCTIVE VIBRATION SENSOR |
| CN114901403A (en) * | 2019-11-29 | 2022-08-12 | 尼古拉斯·井上 | Transducer for generating a vibratory movement |
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| CN116320948A (en) | 2023-06-23 |
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