CN112423182B - Improved bone conduction earphone - Google Patents

Abstract

The invention discloses an improved bone conduction earphone. The bone conduction earphone includes an earphone body and an earphone wire. The earphone body is provided with a bone conduction device and an arc-shaped ear hook. The earphone wire is electrically connected to the earphone body and the bone conduction device. The bone conduction device is provided with at least an inner bone conduction surface and a side bone conduction surface. The bone conduction device has at least two bone conduction paths through which bone conduction sound waves enter the human head from different positions and/or different directions. The invention improves the frequency range of sound that can be restored and transmitted by bone conduction earphones, solves the problem of sound leakage in current bone conduction earphones with a low-cost technical solution, and at the same time improves the depth and sound effect of the sound of bone conduction earphones, and conducts and reproduces the direction, distance, and intensity of sound sources.

Description

An Improved Bone Conduction Earphone

technical field

The invention relates to the technical field of bone conduction earphones, in particular to an improved bone conduction earphone.

Background technique

Traditional bone conduction earphones must be attached to the front of the human ear. Bone conduction earphones transmit sound waves to the ossicles of the human body through the vibration of the steel plate installed in the shell, and transmit the sound waves to people's auditory centers through bone conduction, allowing the wearer to hear the sound.

Traditional bone conduction earphones rely on the steel plate and the air vibration on the front side of the steel plate to generate sound waves. Therefore, because the frequency range of sound waves that bone conduction earphones can transmit is relatively small, there is a commonly known problem of sound leakage. sound.

The current bone conduction earphones use a U-shaped hard rear hanging frame to wear the bone conduction earphones on the human head. The left and right sides of the hard rear hanging frame have elastic arms, which are hung on the ears of the human body through hangers formed on the outer ends of the arms. area.

In addition, the current wearing structure of bone conduction earphones makes the bone conduction device only close to the skin on the front side of the ear, which is not the best sound wave conduction path for bone conduction, and cannot transmit sound signals to the auditory center well, so it is necessary to improve it.

Contents of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide an improved bone conduction earphone, which can increase the frequency range of sound that can be restored and transmitted by the bone conduction earphone, solve the problem of sound leakage in the bone conduction ear, and improve the sound quality of the bone conduction earphone.

In order to achieve the above object, the technical solution adopted in the present invention is: an improved bone conduction earphone. The bone conduction earphone includes an earphone main body, an earphone wire, a bone conduction device and an earhook. The bone conduction device is fixed on the earhook. The earphone wires are respectively electrically connected to the earphone body and the bone conduction device. The bone conduction device is provided with at least an inner bone conduction surface and a side bone conduction surface.

Further, the earhook is provided with a hanging ear portion for hanging on the human ear and a rear mounting portion located at the back of the human ear when worn, the bone conduction device is fixed on the rear mounting portion of the earhook, the inner surface of the bone conduction device is provided with the inner bone conduction surface for abutting against the head skin on the back side of the ear and realizing bone conduction on the head skin, and one side of the bone conduction device facing the human ear is provided with a side bone conduction surface for abutting against the back of the ear and realizing bone conduction on the back of the ear; The conduction direction and conduction path of bone conduction sound waves to the skull and/or ossicular nerve tissue of the human body are different.

Further, the surface of the inner bone-conducting surface is flat or curved, and the surface of the side bone-conducting surface is flat or curved; the frequency range of the bone-conducted sound wave conducted by the inner bone-conducting surface and the frequency range of the bone-conducted sound wave conducted by the side bone-conducting surface have a partial overlap or are completely different.

Further, the bone conduction device includes a housing, a bone conduction vibration component fixed in the inner cavity of the housing, and at least one bone conduction composite medium sheet fixed on the bone conduction surface of the housing, the bone conduction vibration component is arranged on the rear side of the bone conduction composite medium sheet, and the bone conduction composite medium sheet is compounded with at least one hard medium sheet and at least one elastic soft medium diaphragm; the bone conduction surface includes an inner bone conduction surface and/or a side bone conduction surface.

Further, the bone conduction composite medium sheet includes an elastic soft medium diaphragm located in the middle area and a hard medium sheet integrally compounded on the outer edge of the elastic soft medium diaphragm; or, the bone conduction composite medium sheet includes a hard medium sheet located in the central area and an elastic soft medium diaphragm integrally compounded on the outer edge of the hard medium sheet.

Further, the elastic soft medium diaphragm of the bone conduction composite medium sheet is elastically tensioned and fixed to the housing, and only one hard medium sheet is compounded in the middle region of the bone conduction composite medium sheet, or an elastic soft medium diaphragm and a hard medium sheet are compounded up and down in the middle region of the bone conduction composite medium sheet.

Further, a bone conduction surface shell is arranged or compounded on the outer surface of the bone conduction surface or on the outer surface of the bone conduction composite dielectric sheet, the hard dielectric sheet is a hard thin sheet for conducting mid-high frequency sound sources or full-frequency sound sources, and the elastic soft dielectric diaphragm is an elastic thin sheet or diaphragm for conducting mid-low frequency sound sources or only low-frequency sound sources.

Further, the bone conduction earphone is provided with two left and right ear hooks, two earphone wires, and a wire length adjustment mechanism. The rear mounting part of each ear hook is fixed with a bone conduction device. The first ends of the two earphone wires are respectively electrically connected to the two bone conduction devices, and the second ends are respectively electrically connected to the earphone main body. The back side of the face or lateral bone-to-face.

Further, a bracket is fixed in the inner cavity of the housing of the bone conduction device, the bone conduction vibration component is installed on the bracket, the bone conduction composite medium sheet is fixed on the rear side of the inner cavity of the housing to form a bone conduction surface, and there is a conduction space between the bone conduction composite medium sheet and the bone conduction vibration component;

The bone conduction vibration component includes a coil support, a coil, a magnetic steel pull rod, a steel sheet, a U cup and a magnetic steel. The coil support is fixedly installed on the shell or the support. The coil support is provided with a cylinder. The coil is wound and installed on the cylinder. The U cup is fixed on the lower part of the magnetic steel. The U cup has a wall extending upwards around the outer edge of the magnetic steel. The lower part of the magnetic steel pull rod is fixed on the magnetic steel, the steel sheet is installed on the coil bracket or the upper part of the bracket, the steel sheet is arranged on the back side of the bone conduction composite medium sheet, the bone conduction composite medium sheet and the steel sheet are arranged in parallel and at intervals to form a conduction space, the middle part of the steel sheet is provided with a steel sheet through hole, the upper part of the magnetic steel pull rod is provided with a rod head, and the rod head is movably inserted into the steel sheet through hole, and the rod head extends into the conduction space.

Further, the wire length adjustment mechanism includes an adjusting wire clip, the adjusting wire clip is provided with a threading sliding sleeve and a wire pressing block movably installed in the threading sliding sleeve, an elastic element that is movable against the wire pressing block is installed in the threading sliding sleeve, and the threading sliding sleeve is provided with a wire clamping hole in a direction perpendicular to the moving direction of the wire pressing block, and the two earphone wires move through the wire clamping holes respectively, and the wire pressing block is elastically pressed against the two earphone wires respectively, and the wire pressing block is provided with a pressing part protruding from the outside of the threading sliding sleeve;

The ear hook is provided with a hanging ear part and a rear mounting part. The end part of the hanging ear part is integrally formed with an ear fixing part matching the external auditory canal of the human ear. The ear fixing part and the rear mounting part are arranged at a distance from each other. An arc-shaped rod body for hanging on the upper part of the ear is integrally formed between the ear hanging part and the rear mounting part.

Further, the middle part of the ear-hanging fixing part is provided with an ear-hanging hole through the ear-hanging fixing part; the ear-hanging hole is connected to the air, or an earplug is plugged into the ear-hanging hole, or a traditional earphone electrically connected to the earphone body or a bone conduction device is plugged into the ear-hanging hole.

Further, the shape of the ear hanger is a C-shaped elastic flexible frame body, and the ear hanger has an opening facing downward;

The earphone main body includes a U-shaped neck hanger, the left and right ends of the neck hanger are respectively provided with a functional part, the inner cavity of at least one functional part is provided with a battery or a control circuit, the surface of at least one functional part is provided with a control button electrically connected to the control circuit, at least one functional part is provided with at least one radio microphone and/or noise reduction microphone electrically connected to the control circuit, and two earphone wires pass through the middle part of the rear side of the neck hanger;

The upper part of the bone conduction device is fixed to the lower end of the rear mounting part, the lower part of the bone conduction device is connected to the first end of the earphone wire, and the second end of the earphone wire penetrates from the middle of the neck hanger to the inside of the earphone main body and is electrically connected to the control circuit;

After the bone conduction earphone is worn, the earphone wire extending from the bone conduction device to the earphone body and the wire length adjustment mechanism hang freely on the back side of the human head;

The hanging ear fixing part is integrally formed at the end part of the rod body, the cross section of the hanging ear fixing part is larger than the cross section of the rod body, and the cross section shape of the hanging ear fixing part is circular;

The elastic soft medium diaphragm and the hard dielectric sheet are crimped or glued together at the adjacent joints, or the elastic soft medium diaphragm and the hard dielectric sheet are crimped or bonded together at overlapping joints.

Compared with the prior art, the present invention has the advantages that: the present invention increases the frequency range of sound that can be restored and transmitted by bone conduction earphones, solves the problem of sound leakage in current bone conduction earphones with a low-cost technical solution, and simultaneously improves the depth, volume, and sound effect of the sound of bone conduction earphones, and the direction, distance, and intensity of sound sources that are transmitted and reproduced.

Description of drawings

Fig. 1 is a schematic structural diagram of the bone conduction earphone of the present invention.

Fig. 2 is a schematic diagram of the use state of the bone conduction earphone of the present invention.

Fig. 3 is a schematic diagram of the internal structure of the bone conduction device of the present invention.

Fig. 4 is a schematic diagram of the structure of the present invention after inserting earplugs into the ear-hook holes.

Fig. 5 is a schematic diagram of the structure of the present invention after inserting a traditional earphone into the ear-hook hole.

marked in the figure.

1 Headphone body.

2 Bone conduction device 21 Shell 22 Bone conduction surface shell 23 Bracket.

3 ear hooks 31 ear hanging fixing parts 311 ear hanging holes.

4 Earphone cable 40 Neck hanger 41 Adjusting cable clip 42 Pressing block 43 Traditional earphone 44 Traditional earphone cable 45 Earplug 46 Control button.

5 Bone conduction vibration component 51 Coil support 52 Coil 53 Magnetic steel rod 54 Steel sheet 55 U cup 56 Magnetic steel 57 Conduction space.

6 bone conduction composite medium sheet 61 elastic soft medium diaphragm 62 hard medium sheet.

Detailed ways

An improved bone conduction earphone, as shown in Figures 1 to 5, the bone conduction earphone includes an earphone main body 1 and an earphone wire 4, the earphone main body 1 is provided with a bone conduction device 2 and an arc-shaped earhook 3, the earphone wire 4 is electrically connected to the earphone main body 1 and the bone conduction device 2 respectively, the bone conduction device 2 is provided with at least an inner bone conduction surface and a side bone conduction surface, the inner cavity of the bone conduction device 2 is equipped with at least one bone conduction vibration component 5, and the bone conduction vibration component 5 is arranged on the rear side of the inner bone conduction surface or the side bone conduction surface, and the bone conduction device 2 has at least two from different positions and / Or the bone conduction path of bone conduction sound waves entering the human head in different directions. The bone conduction contact surface is increased, which improves the wearing comfort and improves the volume and sound quality of the bone conduction earphones. The bone conduction earphones can restore and finally conduct to the user's auditory system with richer sounds. For example, the bone conduction device 2 conducts sound through two different positions of the inner bone conduction surface and the side bone conduction surface respectively.

The earhook 3 is provided with an ear-mounting portion for hanging on the human ear and a rear mounting portion located behind the human ear when worn. The bone conduction device 2 is fixed to the rear mounting portion of the earhook 3. The inner surface of the bone conduction device 2 is provided with an inner bone conduction surface for abutting against the head skin on the back side of the ear and realizing bone conduction on the head skin. One side of the bone conduction device 2 facing the human ear is provided with a side bone conduction surface for abutting against the back of the ear and realizing bone conduction on the back of the ear. The surface of the inner bone-conducting surface is flat or curved, and the surface of the side bone-conducting surface is flat or curved. The inner bone-conducting surface and the side bone-conducting surface are respectively attached to the corresponding abutment surfaces to improve wearing comfort and bone conduction effect. The conduction direction and conduction path of the bone conduction sound wave to the skull or ossicular nerve tissue of the human body are different during the bone conduction process between the inner bone conduction surface and the side bone conduction surface, so that the bone conduction device 2 can reproduce and conduct external sounds more accurately, especially reproduce the direction, distance and strength of the sound source through bone conduction.

The frequency range of the bone-conducted sound wave conducted by the inner bone-conducted surface is the same as that of the bone-conducted sound wave conducted by the lateral bone-conducted surface. Preferably, the frequency range of the bone-conducted sound waves conducted by the inner bone-conducted surface and the frequency range of the bone-conducted sound waves conducted by the side bone-conducted surfaces only have a partial overlap, or the frequency range of the bone-conducted sound waves conducted by the inner bone-conducted surface and the frequency range of the bone-conducted sound waves conducted by the side bone-conducted surfaces have completely different local overlapping regions. Due to the very small size of the bone conduction device 2, the full-frequency conduction technical solution of the bone conduction device 2 can only be realized by a single bone conduction element, which is still not possible at present, and the production of the vibration unit in the bone conduction element and the special medium surface as the bone conduction surface is very difficult and the price is also very high. However, the inner bone conduction surface and the side bone conduction surface of the bone conduction device 2 of the present invention respectively conduct sounds in different frequency ranges. For example, a bone conduction vibration component 5 cooperates with the inner bone conduction surface and the side bone conduction surface respectively to realize bone conduction sound. It is also possible to realize bone conduction sound through a bone conduction vibration component 5 with the inner bone conduction surface, and at the same time to achieve bone conduction sound through another bone conduction vibration component 5 with the side bone conduction surface. This solves the problem that in the limited space of the bone conduction device 2, under the premise of reducing the cost of the bone conduction device 2, the human auditory nerve can be transmitted and reproduced. The recognized full-frequency sound can of course also transmit and reproduce the full-frequency sound that exceeds the human auditory nerve’s ability to recognize it. With an ultra-low-cost technical solution to solve the technical problem of bone conduction earphone sound leakage while improving sound quality, it can reproduce the direction, distance and strength of the sound source.

The bone conduction earphone is provided with two left and right ear hooks 3, two earphone wires 4 and a wire length adjustment mechanism. A bone conduction device 2 is fixed to the rear mounting part of each ear hook 3. The first ends of the two earphone wires 4 are respectively electrically connected to the two bone conduction devices 2, and the second ends are respectively electrically connected to the earphone main body 1. The wire length adjustment mechanism is installed in the middle of the two earphone wires 4 to adjust the tension between the two ear hooks 3 and the pressure of the bone conduction device 2 on the human skin.

By adjusting the position of the wire clip 41 to change the total length of the two earphone wires 4 between the two earhooks 3 connected together by adjusting the wire clip 41, the tightness of the two earhooks 3 can be adjusted, and the pressure of the bone conduction device 2 on the skin can also be adjusted. Clamping the earphone cable 4 after moving makes the pulling force between the two ear hooks 3 smaller, that is, reduces the clamping force of the two ear hooks 3 . So that all wearers can get a better sense of comfort, and the sound reception effect is better.

The bone conduction earphone needs to put the bone conduction device 2 close to the skull of the human body to achieve a better effect; while the traditional bone conduction earphone adopts the form of headband clamping, the bone conduction device 2 is installed on both ends of the headband, and clamped to the skull of the human body. Since the clamping force cannot be adjusted, some people with a large head circumference will feel uncomfortable when using it; the present invention adjusts the clamping force by adjusting the clamp 41 to ensure the wearing comfort of any crowd.

The wire length adjustment mechanism includes an adjustment wire clamp 41, which is provided with a threading sliding sleeve and a wire pressing block 42 that is movably installed in the threading sliding sleeve. An elastic element that is movable against the wire pressing block 42 is installed in the threading sliding sleeve. There is a pressing part on the outside of the threading sleeve.

Preferably, the wire length adjustment mechanism includes a wire rope retracting mechanism, the wire rope retracting mechanism is provided with a winding box, a bobbin or a reel rotatably installed in the reel box, the bobbin or the reel is equipped with an elastic element, the winding box, the bobbin or the reel is equipped with a locking mechanism, the winding box is provided with at least one outlet, the earphone wire 4 passes through the outlet and is wound around the reel or the reel. Similarly, the tightness of the two earhooks 3 can be adjusted by winding or unwinding the earphone wire 4 and changing the total length of the two earphone wires 4 between the two earhooks 3 connected by the wire rope retracting mechanism through the wire rope retracting mechanism, so as to realize the adjustment of the clamping force of the two earhooks 3 .

The ear hook 3 is provided with an ear part and a rear mounting part. The end part of the ear part is integrally formed with an ear fixing part 31 matching the external auditory canal of the human ear. The ear fixing part 31 and the rear mounting part are arranged at a distance from each other. An arc-shaped rod body for hanging on the upper part of the ear is integrally formed between the ear part and the rear mounting part. The shape of the earhook 3 is a C-shaped elastic flexible frame body, and the earhook 3 has an opening facing downwards; the earphone body 1 includes a U-shaped neck frame 40, the left and right ends of the neck frame 40 are respectively provided with a functional part, the inner cavity of at least one functional part is equipped with a battery or a control circuit, the surface of at least one functional part is provided with a control button 46 electrically connected to the control circuit, and at least one functional part is provided with at least one radio microphone and/or noise reduction microphone electrically connected to the control circuit. Two earphone wires 4 pass through the middle part of the rear side; the upper part of the bone conduction device 2 is fixed on the lower end of the rear mounting part, the lower part of the bone conduction device 2 is connected to the first end of an earphone wire 4, and the second end of the earphone wire 4 penetrates from the middle part of the neck hanger 40 to the inside of the earphone main body 1 and is electrically connected to the control circuit; after the bone conduction earphone is worn, the earphone wire 4 extending from the bone conduction device 2 to the earphone main body 1 and the wire length adjustment mechanism hang freely on the rear side of the head and human body; Tensile force and pressure against the skin of the human body using the bone conduction device 2 .

The hanging ear fixing part 31 is integrally formed at the end of the rod body, the cross section of the hanging ear fixing part 31 is larger than the cross section of the rod body, and the cross section of the hanging ear fixing part 31 is circular. The ear hook fixing part 31 enables the ear hook 3 to be stably held on the upper part of the ear.

The present invention improves the structure of the bone conduction earphone so that it can be worn in a new way. The tightness of the earphone wire 4 is adjusted by the wire length adjustment mechanism, thereby adjusting the tension of the earhook 3 and the pressure of the human skin of the bone conduction device 2. Users with different head sizes can use it and adjust it to the most comfortable state with the best sound collection effect. It will not be limited by the size and shape of the user's head, and after wearing it, the earphone wire 4 hangs freely between the bone conduction device 2 and the earphone main body so that the bone conduction device 2 always maintains a moderate adhesion. Device 2 is always kept moderately close to the skin to ensure good sound transmission.

Specifically, the middle part of the ear-hanging fixing part 31 is provided with an ear-hanging hole 311 that runs through the ear-hanging fixing part 31 and maintains air communication. Through the ear-hanging hole 311, the external sound can be heard and the external air pressure can be balanced. The design of the ear-hanging hole 311 makes the ear-hanging fixing part 31 have greater deformation, and can also improve wearing comfort when worn. During the wearing process, the ear-hook hole 311 can be kept connected to the air. In this way, the user's ear can directly receive the sound transmitted to the ear through the air. For the user, the bone conduction device 2 can be directly received while receiving the external sound.

The earphone main body 1 is provided with a wireless communication module or an audio input interface electrically connected to the control circuit, through which the wireless communication module is wirelessly connected to electronic devices such as mobile phones or televisions, so as to receive and play corresponding voice or audio files through the wireless communication module or audio input interface.

Specifically, a bone conduction device 2 is provided with an arc-shaped earhook 3 adapted to the auricle of the human ear. The first ends of the two earphone wires 4 are respectively electrically connected to the earphone main body 1, and the outer ends are respectively electrically connected to the two bone conduction devices 2, so as to provide power, control signals and audio data to the bone conduction device 2. The earhook 3 is in an arc shape adapted to the auricle of the human ear. An ear-hanging fixing part 31 matched with the external auditory canal of the human ear, and an earplug 45 is placed in the movable plug of the hanging-ear fixing part 31 . The earplug 45 is tightly inserted into the ear-hook hole 311 , and the earplug 45 is tightly fitted with the ear-hook hole 311 , and the ear is sealed by the earplug 45 to isolate external sound. When physical noise reduction is required, the earplug 45 is used to block the ear-hook hole 311, so that the ambient sound cannot enter the ear canal, thus realizing physical noise reduction; This design is not only simple in structure, but also easy to replace the earplugs 45, and the replacement cost is low. When the earplugs 45 are not in use, the earplugs 45 can be removed without any irregular swing up, down, left, and right.

The physical noise reduction adopted by the existing bone conduction earphones is to fix the traditional earplugs 45 on the bone conduction earphones, wear them when needed, and take them off when not in use; the earplugs 45 are fixed on the earphone body through the earphone wire 4, and when in motion, it is easy to shake and affect the experience; the earplugs 45 are directly fixed on the earphone body, which reduces the wearing comfort and causes discomfort when worn for a long time. In the present invention, an ear-hanging fixing part 31 is provided at the end of the ear-hanging 3, and the ear-hanging fixing part 31 is matched with the opening of the external auditory canal; when worn, the ear-hanging 3 is hung on the ear along the auricle, and the ear-hanging fixing part 31 is plugged to the opening of the external auditory canal. After the ear-hanging fixing part 31 blocks the external auditory canal, external environmental sounds cannot enter the auditory nerve through the ear canal, and physical noise reduction can be realized.

The front end of the ear-hook 3 of the traditional ear-mounted earphone has no fixed point, and the earphone is likely to fall off or cause poor sound reception during intense exercise. Especially when jumping, the human body moves vertically relative to the ground, and the fixing ability of the ear-hung earphone in the vertical direction is relatively weak; Lateral movement has better stability.

The power supply system is electrically connected to the control main board, and the power supply system supplies power to the control main board. The control main board transmits the received audio signal to two bone conduction devices 2 through the earphone wire 4. The bone conduction device 2 converts the audio signal into amplitude and vibrates the skull to transmit sound; The earphone main body 1 is provided with a bluetooth module for wirelessly transmitting audio signals, and the bluetooth module is electrically connected with the control board. The Bluetooth module transmits and receives audio signals without a wired connection to the audio source, which improves mobility and convenience.

Preferably, the traditional earphone 43 is plugged into the ear-hook hole 311, and the traditional earphone 43 is electrically connected to the earphone main body 1 through the traditional earphone wire 44, or the traditional earphone 43 is wirelessly connected to the earphone main body 1 through a wireless communication module such as Bluetooth or WIFI. The external sound is obtained from the microphone installed in the earphone main body 1 and sent to the traditional earphone 43 for playback, and audio such as music can also be played through the traditional earphone 43 .

Bone conduction earphones transmit sound through the skull and have no sound field. Compared with ordinary air conduction earphones, the sound quality is poorer and the experience is not good. The present invention integrates the traditional earphone 43 into the bone conduction earphone, which can be freely switched to the bone conduction earphone and the traditional earphone 43, or the bone conduction earphone and the traditional earphone 43 work at the same time; the ear hook fixing part 31 of the ear hook 3 matches the external auditory canal opening of the human body. The ambient sound enters the external auditory canal through the ear-hanging hole 311 of the ear-mounting fixing part 31, so that the ambient sound can still be heard when the bone conduction earphone is used alone. Combining transmission traditional earphones 43 with bone conduction earphones, there is no stethoscope effect during exercise, and the ears can be opened without blocking the external auditory canal, which ensures the possibility of using earphones in dangerous situations. When using earphones, you can also notice changes in the surrounding environment, making it safer to use. When listening to music, the sound quality is better with air conduction sound.

The conventional earphone 43 is provided with at least one sounding unit. The sounding unit is provided with a protruding head for transmitting sound to the human ear. The head of the sounding unit is interference fit with the corresponding ear-hook hole 311 . When the traditional earphone 43 is tightly inserted into the ear-hook hole 311, the external auditory canal is blocked, and the ambient sound cannot be heard at this time. When the traditional earphone 43 is not working, it has the effect of physically reducing the noise of the bone conduction earphone; the traditional earphone 43 and the bone conduction earphone can work at the same time, with better sound quality and more three-dimensional sound; the traditional earphone 43 can also work alone, which can relieve the sense of urgency when the bone conduction earphone is pressed against the skull for a long time.

In a preferred embodiment, the bone conduction device 2 includes a housing 21, a bone conduction vibration assembly 5 fixed in the inner cavity of the housing 21, and at least one bone conduction composite dielectric sheet 6 fixed on the bone conduction surface of the housing 21. The bone conduction vibration assembly 5 is arranged on the rear side of the bone conduction composite dielectric sheet 6, and the bone conduction composite dielectric sheet 6 is compounded with at least one hard dielectric sheet 62 and at least one elastic soft dielectric membrane 61. The bone conduction composite medium sheet 6 has an elastic soft dielectric diaphragm 61 mainly used to restore low-frequency vibrations of bass and high amplitude, and a hard dielectric sheet 62 mainly used to restore low-mid and high-pitched vibrations.

The elastic soft medium diaphragm 61 is made of soft and elastic cloth, paper, artificial leather, animal leather, plastic sheet, etc., or the elastic soft medium diaphragm 61 is a thin diaphragm or thin sheet made of at least two material layers. Larger, making the bass part sink deeper, that is, the bass sound effect is better, the bass reproduction is higher, and it solves the problem of serious sound leakage in the bass part of the prior art. Hard dielectric sheet 62 selects the thin sheet material that plastics or metal are made for use, or hard dielectric sheet 62 selects the thin sheet material that is composited by at least two material layers, hard dielectric sheet 62 can be a solid sheet, also can be that the interior is provided with a plurality of mutually independent resonant cavities composite sheet material, for example, the hard dielectric sheet 62 selects the honeycomb composite board that the upper and lower sides are compounded with the solid sheet material middle part and is compounded with the honeycomb partition board, and the hard dielectric sheet 62 is to the conduction and the sound return principle of the sound source of the intermediate frequency and the high frequency It has better expressive power, and there will be no sound leakage in the intermediate frequency sound source and the high frequency sound source, so that the bone conduction composite dielectric sheet 6 of the present invention has better bone conduction ability in the bass, midrange and treble, not only has a high degree of sound reproduction for the bass, midrange and treble, and the sound quality and sound effect obtained by bone conduction restoration are better, and there will be no sound leakage in the bone conduction process of the full frequency sound source.

A preferred embodiment of the bone conduction composite medium sheet 6 , the bone conduction composite medium sheet 6 includes an elastic soft medium membrane 61 located in the middle region and a hard medium sheet 62 integrally compounded on the outer edge of the elastic soft medium membrane 61 . The hard dielectric sheet 62 is in the shape of a ring, and the elastic soft dielectric diaphragm 61 is circular, and the elastic soft dielectric diaphragm 61 fills and fixes the hollow area in the middle of the rigid dielectric sheet 62 .

A preferred embodiment of the bone conduction composite medium sheet 6 , the bone conduction composite medium sheet 6 includes a hard medium sheet 62 located in the central region and an elastic soft medium diaphragm 61 integrated on the outer edge of the hard medium sheet 62 . The elastic soft medium diaphragm 61 is in the shape of a ring, and the hard dielectric sheet 62 is circular, and the hard dielectric sheet 62 fills and fixes the hollow area in the middle of the elastic soft dielectric diaphragm 61 .

In a preferred embodiment, the elastic soft medium diaphragm 61 of the bone conduction composite medium sheet 6 is elastically tensioned and fixed to the housing 21 , and only one hard medium sheet 62 is compounded in the middle region of the bone conduction composite medium sheet 6 .

In a preferred embodiment, the elastic soft medium diaphragm 61 of the bone conduction composite dielectric sheet 6 is elastically tensioned and fixed to the housing 21, and an elastic soft dielectric diaphragm 61 and a hard dielectric sheet 62 are compounded up and down in the middle area of the bone conduction composite dielectric sheet 6. That is to say, the elastic soft medium diaphragm 61 is a thin sheet of continuous distributed circular elastic medium with a hard medium sheet 62 whose circular diameter is smaller than that of the elastic soft dielectric diaphragm 61 . The bone conduction composite medium sheet 6, which is compounded with a hard medium sheet 62 in the local area of the middle part of the elastic soft medium diaphragm 61, not only has a better bass performance during the bone conduction process, but also has a better mid-range and high-pitch performance.

Wherein, the hard dielectric sheet 62 is a hard thin sheet made of plastic or metal for conducting mid-high frequency sound source or full-frequency sound source, and the elastic soft dielectric diaphragm 61 is an elastic thin sheet or diaphragm for conducting mid-low frequency sound source or only low-frequency sound source.

Preferably, the elastic soft dielectric diaphragm 61 is tensioned and fixed to the casing 21 or the hard dielectric sheet 62 with a tension of 0.1-20Kg. Preferably, the elastic soft dielectric diaphragm 61 is tensioned and fixed to the casing 21 or the hard dielectric sheet 62 with a tension of 0.5-5Kg to achieve better transmission of low-frequency sound sources with a frequency lower than 160 Hz, and the transmitted bass part has deeper sinking performance and better bass performance.

Preferably, an osteoconductive surface shell 22 is arranged or compounded on the outer surface of the bone conduction surface or on the external surface of the bone conduction composite medium sheet 6, and the bone conduction surface shell 22 is pressed against human skin to improve comfort while realizing bone conduction.

The bone conduction surface of the housing 21 is fixed with at least one bone conduction medium sheet and at least one bone conduction composite medium sheet 6, that is, at least two bone conduction vibration pieces with different structural designs are arranged on the bone conduction surface, wherein the bone conduction medium sheet is a traditional bone conduction piece, or the bone conduction medium sheet is a bone conduction vibration piece with a single material layer or only a single structural layer, and the bone conduction composite medium piece 6 is a bone conduction vibration piece with at least two different material layers or a composite structure design. Conductive composite dielectric sheet 6 .

For, the elastic soft medium diaphragm 61 and the hard dielectric sheet 62 are laterally adjacently spliced or internally and externally adjacently spliced, and the elastic soft dielectric diaphragm 61 and the hard dielectric sheet 62 are crimped or bonded together at the adjacent joints.

Or, for the elastic soft medium film 61 and the hard medium film 62 are stacked up and down, the elastic soft medium film 61 and the hard medium film 62 are crimped or bonded together on the overlapped contact surfaces.

A bracket 23 is fixed in the inner cavity of the housing 21 of the bone conduction device 2, the bone conduction vibration component 5 is installed on the bracket 23, and the bone conduction composite dielectric sheet 6 is fixed on the back side of the inner cavity of the housing 21 to form a bone conduction surface. There is a conduction space 57 between the bone conduction composite dielectric sheet 6 and the bone conduction vibration component 5, and the air compression in the conduction space 57 generates and conducts shock waves. Specifically, the bone conduction vibration assembly 5 includes a coil support 51, a coil 52, a magnetic steel pull rod 53, a steel sheet 54, a U cup 55, and a magnetic steel 56. The coil support 51 is fixedly mounted on the housing 21 or the support 23. The coil support 51 is provided with a cylinder, and the coil 52 is wound and installed on the cylinder. The U cup 55 is fixed on the lower part of the magnetic steel 56. The U cup 55 has a wall extending upwards around the outer edge of the magnetic steel 56. In the inner cavity of the body, the wall of the U cup 55 is located in the outer edge of the cylinder and the coil. The magnetic steel pull rod 53 is movably installed on the coil support 51 or the support 23. The bottom of the magnetic steel pull rod 53 is fixed on the magnetic steel 56. The steel sheet 54 is installed on the upper part of the coil support 51 or the support 23. The steel sheet 54 is arranged on the rear side of the bone conduction composite medium sheet 6. A steel sheet 54 through hole is provided, and a rod head is provided on the upper part of the magnetic steel pull rod 53 . The rod head is movably inserted in the steel sheet 54 through hole, and the rod head extends into the conduction space 57 .

Preferably, the inner surface of the housing 21 is provided with an osteoconductive surface for abutting against the head skin on the back side of the ear and realizing bone conduction on the head skin, and one side intersecting with the inner surface is provided with another osteoconductive surface for abutting against the back of the ear and realizing bone conduction on the back of the ear.

Claims (13)

1. An improved bone conduction earphone, the bone conduction earphone comprises an earphone main body (1), an earphone wire (4), a bone conduction device (2) and an ear hook (3), the bone conduction device (2) is fixed on the ear hook (3), and the earphone wire (4) is electrically connected to the earphone main body (1) and the bone conduction device (2), respectively, and is characterized in that: The ear hook (3) is provided with an ear hanging part for hanging on the ear of the human body and a rear mounting part located on the back side of the human ear when worn, and the bone conduction device (2) is fixed on the rear mounting part of the ear hook (3), The inner surface of the bone conduction device (2) is provided with an inner bone conduction surface for abutting against the head skin on the back side of the ear and realizing bone conduction on the head skin, and one side of the bone conduction device (2) facing the human ear is provided with a side bone conduction surface for abutting against the back of the ear and realizing bone conduction on the back of the ear; A bone conduction vibration component (5) is used to cooperate with the inner bone conduction surface and the side bone conduction surface to realize bone conduction sound, with bone conduction sound in both vertical and horizontal directions, In the process of bone conduction, the conduction direction and conduction path of the bone conduction sound wave to the skull and/or ossicular nerve tissue of the human body are different between the inner bone conduction surface and the lateral bone conduction surface. The bone conduction device (2) has at least two bone conduction paths through which bone conduction sound waves enter the head of a human body from different positions and directions. 2. An improved bone conduction earphone according to claim 1, characterized in that: the surface of the inner bone conduction surface is flat or curved, and the surface of the side bone conduction surface is a plane or curved surface; the frequency range of the bone conduction sound waves conducted by the inner bone conduction surface and the frequency range of the bone conduction sound waves conducted by the side bone conduction surface have a partial overlap or are completely different. 3. The improved bone conduction earphone according to claim 1, characterized in that: the bone conduction device (2) comprises a housing (21), a bone conduction vibration assembly (5) fixed in the inner cavity of the housing (21), and at least one bone conduction composite medium sheet (6) fixed on the bone conduction surface of the housing (21), the bone conduction vibration assembly (5) is arranged on the rear side of the bone conduction composite medium sheet (6), and the bone conduction composite medium sheet (6) is compounded with at least one hard medium sheet (62) and at least one elastic Soft medium diaphragm (61); the bone conduction surface includes the inner bone conduction surface and/or the side bone conduction surface. 4. The improved bone conduction earphone according to claim 3, characterized in that: the bone conduction composite medium sheet (6) comprises an elastic soft medium diaphragm (61) located in the middle region and a hard medium sheet (62) integrally compounded on the outer edge of the elastic soft medium diaphragm (61); or, the bone conduction composite medium sheet (6) comprises a hard medium sheet (62) located in the central region and an elastic soft medium diaphragm (61) integrally compounded on the outer edge of the hard medium sheet (62). 5. A kind of improved bone conduction earphone according to claim 3, it is characterized in that: described elastic soft medium diaphragm (61) of described bone conduction composite medium sheet (6) is elastically tensioned and fixed on described housing (21), only compound a hard medium sheet (62) in the middle region of bone conduction composite medium sheet (6) or compound an elastic soft medium diaphragm (61) and a hard medium sheet (62) up and down in the middle region of bone conduction composite medium sheet (6). 6. A kind of improved bone conduction earphone according to claim 3, it is characterized in that: on the outer surface of described bone conduction surface or on the outer surface of described bone conduction composite medium sheet (6), a bone conduction surface shell (22) is arranged or compounded, and described hard medium sheet (62) is the hard thin sheet material that is used for conducting medium-high frequency sound source or full-frequency sound source, and described elastic soft medium diaphragm (61) is used for conducting medium-low frequency sound source or only conducting low-frequency sound source with elastic thin sheet or diaphragm . 7. An improved bone conduction earphone according to claim 3, characterized in that: said elastic soft medium diaphragm (61) and said hard medium sheet (62) are crimped or bonded into one body at the adjacent joints. 8. An improved bone conduction earphone according to claim 3, characterized in that: said elastic soft medium diaphragm (61) and said hard medium sheet (62) are crimped or bonded into one body on overlapping contact surfaces. 9. The improved bone conduction earphone according to any one of claims 1 to 8, characterized in that: the bone conduction earphone is provided with two left and right ear hooks (3), two earphone wires (4) and a wire length adjustment mechanism, the rear mounting part of each earhook (3) is fixed with a bone conduction device (2), the first ends of the two earphone wires (4) are electrically connected to the two bone conduction devices (2), and the second ends are respectively electrically connected to the earphone main body (1), and the wire length adjustment mechanism is installed on the two earphone wires (4). To adjust the tension between the two ear hooks (3) and/or the pressure of the bone conduction device (2) on human skin, at least one bone conduction vibration component (5) is installed in the inner cavity of the bone conduction device (2), and the bone conduction vibration component (5) is arranged behind the inner bone transmission surface or the side bone transmission surface. 10. The improved bone conduction earphone according to claim 9, characterized in that: a bracket (23) is fixed in the inner cavity of the housing (21) of the bone conduction device (2), the bone conduction vibration component (5) is mounted on the bracket (23), the bone conduction composite dielectric sheet (6) is fixed on the back side of the inner cavity of the housing (21) to form a bone conduction surface, and there is a conduction space (57) between the bone conduction composite dielectric sheet (6) and the bone conduction vibration component (5); The bone conduction vibration assembly (5) includes a coil support (51), a coil (52), a magnetic steel pull rod (53), a steel sheet (54), a U cup (55) and a magnetic steel (56), the coil support (51) is fixedly mounted on the housing (21) or the support (23), the coil support (51) is provided with a cylinder, the coil (52) is wound and installed on the cylinder, the U cup (55) is fixed on the bottom of the magnet (56), and the U cup (55) has The wall extending upwards around the outer edge of the magnetic steel (56), the middle and upper part of the magnetic steel (56) is movably set in the inner cavity of the cylinder, the wall of the U cup (55) is located in the outer edge of the cylinder and the coil, the magnetic steel pull rod (53) is movably installed on the coil support (51) or support (23), the lower part of the magnetic steel pull rod (53) is fixed on the magnetic steel (56), and the steel sheet (54) is installed on the coil support (51) or support (23) ), the steel sheet (54) is arranged on the rear side of the bone conduction composite medium sheet (6), the bone conduction composite medium sheet (6) and the steel sheet (54) are arranged at intervals in parallel to form a conduction space (57), the middle part of the steel sheet (54) is provided with a steel sheet (54) through hole, and the top of the magnetic steel pull rod (53) is provided with a rod head, which is movably inserted in the steel sheet (54) through hole, and the rod head extends into the conduction space (57). 11. An improved bone conduction earphone according to claim 9, characterized in that: the wire length adjustment mechanism includes an adjustment wire clip (41), the adjustment wire clip (41) is provided with a threading sliding sleeve and a wire pressing block (42) movably installed in the threading sliding sleeve, an elastic element that is movable against the wire pressing block (42) is installed in the threading sliding sleeve, and the threading sliding sleeve is provided with a wire clamping hole along the vertical direction of the moving direction of the wire pressing block (42), and the two earphone wires (4) move through the clip respectively The wire holes and the wire-pressing block (42) are respectively elastically pressed against the two earphone wires (4), and the wire-pressing block (42) is provided with a pressing portion protruding from the outside of the threading sliding sleeve; The ear hook (3) is provided with an ear part and a rear mounting part. The end part of the ear part is integrally formed with an ear fixing part (31) matching the external auditory canal of the human ear. The ear fixing part (31) and the rear mounting part are arranged at a distance from each other. An arc-shaped rod body for hanging on the upper part of the ear is integrally formed between the ear part and the rear mounting part. When worn, the rear mounting part and the bone conduction device (2) are located at the back of the ear. ) plug into the external auditory canal of the ear. 12. An improved bone conduction earphone according to claim 11, characterized in that: the middle part of the ear-hanging fixing part (31) is provided with an ear-hanging hole (311) passing through the ear-hanging fixing part (31); the ear-hanging hole (311) is connected to the air, or an earplug (45) is plugged into the ear-hanging hole (311), or a traditional earphone electrically connected to the earphone body (1) or the bone conduction device (2) is plugged into the ear-hanging hole (311) (43). 13. An improved bone conduction earphone according to claim 12, characterized in that: the shape of the earhook (3) is a C-shaped elastic flexible frame, and the earhook (3) has an opening facing downward; The earphone main body (1) includes a U-shaped neck rest (40), the left and right ends of the neck rest (40) are respectively provided with a functional part, the inner cavity of at least one functional part is provided with a battery or a control circuit, the surface of at least one functional part is provided with a control button (46) electrically connected to the control circuit, at least one functional part is provided with at least one radio microphone and/or noise reduction microphone electrically connected to the control circuit, and two earphone wires (4) pass through the middle of the rear side of the neck rest (40); The upper part of the bone conduction device (2) is fixed to the lower end of the rear mounting part, the lower part of the bone conduction device (2) is connected to the first end of the earphone wire (4), and the second end of the earphone wire (4) penetrates from the middle of the neck hanger (40) to the inside of the earphone body (1) and is electrically connected to the control circuit; After the bone conduction earphone is worn, the earphone wire (4) extending from the bone conduction device (2) to the earphone main body (1) and the wire length adjustment mechanism hang freely on the back side of the human head; The hanging ear fixing part (31) is integrally formed at the end of the rod body, the cross section of the hanging ear fixing part (31) is larger than the cross section of the rod body, and the cross section shape of the hanging ear fixing part (31) is circular.