CN112367596A - Bone conduction sound production device - Google Patents
Bone conduction sound production device Download PDFInfo
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- CN112367596A CN112367596A CN202011459320.5A CN202011459320A CN112367596A CN 112367596 A CN112367596 A CN 112367596A CN 202011459320 A CN202011459320 A CN 202011459320A CN 112367596 A CN112367596 A CN 112367596A
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- diaphragm
- vibrating diaphragm
- bone conduction
- cavity
- conduction sound
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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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
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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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
- H04R7/08—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers separated by air or other fluid
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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
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/13—Hearing devices using bone conduction transducers
Abstract
The invention provides a bone conduction sound production device, and belongs to the technical field of bone conduction devices. The invention comprises a vibrating diaphragm, an exciter and a bracket, wherein the bracket and the vibrating diaphragm enclose a cavity, one surface of the bracket, which is opposite to the vibrating diaphragm, is a bottom wall, the vibrating diaphragm can be attached to a human face in the vibrating diaphragm direction or the bottom wall direction when the automobile is worn, the vibrating diaphragm can make sound vibration under the action of the exciter, the vibrating diaphragm is a single-layer or multi-layer film, the multi-layer film is a single material or different materials, and the multi-layer film comprises a structure combining solid and solid, a structure combining solid and liquid, or a structure combining solid and gas. The cavity body is not provided with the damping hole, and can also be a cavity body with the damping hole. The exciter comprises a magnetic circuit component and a coil component which are respectively fixed on the vibrating diaphragm and the bottom wall, and the positions of the magnetic circuit component and the coil component can be interchanged, or the exciter is integrally packaged and then installed on the vibrating diaphragm. The bone conduction sound production device realizes good medium and low frequency response effect through air coupling sound transmission or cavity wall coupling sound transmission.
Description
Technical Field
The invention relates to the technical field of bone conduction devices, in particular to a bone conduction sound production device.
Background
Earphones in the current market are classified into an ear type earphone, an in-ear type earphone, a headphone and an ear-hook type earphone according to wearing modes. In general, most of these earphones use the conventional principle of using air vibration, which vibrates air, which in turn vibrates the eardrum, thus transmitting sound into the ear. The noise reduction function of the common earphone is not satisfactory, the frequency and the tone quality of the playable music are limited, and meanwhile, the earphone is used for a long time in a large volume to influence the eardrum, so that the hearing is reduced. Accordingly, a bone conduction headset is gradually emerging in the market, and a bone conduction wearable device is also emerging.
Bone conduction is a sound conduction mode, that is, sound is converted into mechanical vibration with different frequencies, and sound waves are transmitted through the skull, the bone labyrinth, the lymph fluid of the inner ear, the spiral organ and the auditory center of a human body. Compared with the traditional sound conduction mode of generating sound waves through a sound film, the bone conduction mode omits a plurality of sound wave transmission steps, can realize clear sound restoration in a noisy environment, and does not influence other people due to the fact that the sound waves are diffused in the air. Bone conduction earphones transmit sound directly through the skull to the ear nerves inside the ear, without the need for the eardrum, and hearing is not affected. Meanwhile, the sound around the bone conduction earphone can still be heard and general conversation can be carried out, thus avoiding accident danger caused by the fact that the outside sound can not be heard.
However, because the bone conduction earphone conducts the bone to the ossicles of the ears by vibrating the skin and the skull, if the bone conduction earphone is worn by being attached to the skin, the vibration generated by the low frequency (20 hz-300 hz) and the medium frequency (300 hz-1000 hz) can cause people to feel uncomfortable in the bone conduction application, and because the vibration displacement generated by the low frequency and the medium frequency is large, the receiver body of the people is numb and itchy, therefore, the existing bone conduction earphone filters most or all of the low frequency content, so that the comfort level of the people wearing the bone conduction earphone is improved. Simultaneously, because current bone conduction earphone realizes vibration conduction sound production through moving the iron formula, well, low frequency response distortion, and the audio is not good, consequently research a section has abundant low frequency content, and it is very meaningful to improve the bone conduction sound generating mechanism of well, low frequency tone quality audio.
The prior art has at least the following disadvantages:
1. the existing bone conduction earphone is used for avoiding discomfort of a receiver body caused by large displacement vibration of low and medium frequencies when the existing bone conduction earphone is directly attached to skin for wearing, so that most or all of the contents of the low and medium frequencies (20 hz-1000 hz) are filtered, and the tone quality is seriously influenced;
2. the existing bone conduction earphone realizes vibration conduction sounding through a moving iron type, has distortion of medium and low frequency response and unsatisfactory sound effect.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a bone conduction generating device which comprises a vibrating diaphragm, an exciter and a support, wherein the support and the vibrating diaphragm enclose a cavity, one side of the support, which is opposite to the vibrating diaphragm, is a bottom wall, the support can be attached to a human face in the vibrating diaphragm direction or in the bottom wall direction when being worn, the vibrating diaphragm can make sound vibration under the action of the exciter, the vibrating diaphragm is a single-layer or multi-layer film, the multi-layer film is made of a single material or different materials, and the multi-layer film comprises a structure combining solid and solid, a structure combining solid and liquid, or a structure combining solid and gas. The cavity body is not provided with the damping hole, and can also be a cavity body with the damping hole. The exciter comprises a magnetic circuit component and a coil component which are respectively fixed on the vibrating diaphragm and the bottom wall, and the positions of the magnetic circuit component and the coil component can be interchanged, or the exciter is integrally packaged and then installed on the vibrating diaphragm. The bone conduction sound production device realizes good medium and low frequency response effect through air coupling sound transmission or cavity wall coupling sound transmission. Can be used to bone conduction earphone, also can be used with head wearing equipment, like VR head apparent to and equipment such as AR/VR glasses.
The invention provides a bone conduction sound production device, which comprises a vibrating diaphragm, an exciter and a bracket, wherein the vibrating diaphragm is arranged on the bracket;
the vibrating diaphragm is a circular, oval or rectangular film; the vibrating diaphragm is arranged on the bracket; the diaphragm is provided with a first surface and a second surface;
a first cavity is arranged between the first surface of the diaphragm and the bracket; a second cavity is arranged between the second side of the diaphragm and the bracket;
the exciter comprises a magnetic circuit component and a coil component, and is arranged in the first cavity;
the diaphragm can vibrate under the action of the exciter.
Preferably, the diaphragm is a single-layer or multi-layer film;
the multilayer film includes at least a first layer and a second layer, the first and second layers being solid materials.
Preferably, a third layer is arranged between the first layer and the second layer, and the third layer is liquid, gas or solid.
Preferably, one of the magnetic circuit assembly and the coil assembly is mounted on the first surface of the diaphragm, and the other of the magnetic circuit assembly and the coil assembly is mounted on the inner surface of the bottom wall of the bracket;
or the magnetic circuit component and the coil component are packaged and then integrally installed on the first surface of the vibrating diaphragm.
Preferably, the material of the diaphragm is metal, plastic, silica gel, glass or composite material; the support is made of metal, plastic, silica gel, glass or composite materials.
Preferably, the bracket is provided with a bottom wall and a side wall, and a damping hole is arranged on the side wall or the bottom wall of the bracket;
preferably, the first and second electrodes are formed of a metal,
the end part of the side wall is provided with a bulge;
the bulge at the end part of the side wall is provided with an outer surface, an inner surface and a connecting surface;
the bottom of the bulge at the end part of the side wall extends inwards to form a bearing surface of the side wall and is used for bearing the edge of the vibrating diaphragm.
Preferably, the second cavity is a semi-closed cavity surrounded by the second surface of the diaphragm and the inner surface of the protrusion at the end of the side wall.
Preferably, the first cavity is enclosed by an inner surface of the bottom wall of the support, an inner surface of the side wall of the support, and the first face of the diaphragm.
Preferably, the frequency response range of the bone conduction sound emitting device comprises frequencies below 300 Hz.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention realizes the vibration of the vibrating diaphragm by utilizing the exciter, further causes the air vibration in the cavity by the vibration of the vibrating diaphragm, and further realizes the resonance acoustic cavity which can provide rich low-frequency response
(2) When the vibrating diaphragm is of a multilayer structure, the vibrating diaphragm can be of a solid-solid structure, a solid-liquid structure or a solid-gas structure, and different structures can adjust resonance frequency, improve distortion and enrich sound effect.
(3) The exciter can be of an integrated structure or a split structure, and in the split structure, the magnetic circuit component and the coil component can be respectively arranged on the inner surfaces of the vibrating diaphragm and the bottom wall, so that the structure is more flexible.
(4) In the cavity structure, the damping holes are formed in the side wall of the support or the bottom of the support, and the existence and nonexistence of the damping holes, the size of the damping holes and the depth of the hole channel can be flexibly adjusted by changing the existence and nonexistence of the damping holes, and the medium-frequency and low-frequency response performance can be effectively improved.
(5) According to the two forms of the invention, when the human face-wearing mask is worn, the direction of the vibrating diaphragm is attached to the human face, so that air coupling sound transmission is realized, and the effect of air coupling sound transmission low-frequency response is better; or another kind when wearing, the diapire direction is laminated with the people's face, realizes the chamber wall coupling, and chamber wall coupling transaudient medium and low frequency response effect is better, especially to the improvement of medium frequency response.
Drawings
Fig. 1 is a wearing schematic view of an embodiment of the present invention, in which a diaphragm is attached to a human face in a direction to realize air coupling sound transmission;
FIG. 2 is a wearing schematic view of an embodiment of the invention, wherein the direction of the bottom wall is attached to a human face, and cavity wall coupling sound transmission is realized;
FIG. 3-1 is a perspective view of an embodiment of the present invention without a damping hole;
FIG. 3-2 is a front view of one embodiment of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3-2, shown without the dampening holes;
FIG. 5 is a perspective view of a damped hole of one embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along line A-A of FIG. 3-2, with the damping holes therein;
FIG. 7 is a cross-sectional view of a diaphragm structure according to an embodiment of the present invention, including a three-layer membrane, solid-solid;
FIG. 8 is a cross-sectional view of a diaphragm structure according to an embodiment of the present invention, including a three-layer membrane, solid-liquid-solid;
FIG. 9 is a cross-sectional view of a diaphragm structure according to an embodiment of the present invention, including a three-layer membrane, solid-gas-solid;
fig. 10 is an actuator assembly view of an embodiment of the present invention, in which a magnetic circuit assembly is mounted on the inner surface of the diaphragm and a coil assembly is mounted on the inner surface of the bottom wall;
fig. 11 is a sectional view of an actuator assembly according to an embodiment of the present invention, in which a magnetic circuit assembly is mounted on an inner surface of a diaphragm and a coil assembly is mounted on an inner surface of a bottom wall;
fig. 12 is an assembly view of the actuator according to one embodiment of the present invention, in which the magnetic circuit assembly is mounted on the inner surface of the bottom wall and the coil assembly is mounted on the inner surface of the diaphragm;
fig. 13 is a sectional view of an actuator assembly according to an embodiment of the present invention, in which a magnetic circuit assembly is mounted on the inner surface of the bottom wall and a coil assembly is mounted on the inner surface of the diaphragm;
FIG. 14 is an assembled schematic view of an actuator according to an embodiment of the invention, the actuator being mounted entirely on the inner surface of the diaphragm;
FIG. 15 is a cross-sectional view of an actuator assembly of one embodiment of the invention, the actuator being mounted entirely on the inner surface of the diaphragm;
FIG. 16 is a schematic illustration of the effective vibration geometry center location for one embodiment of the present invention, the diaphragm being circular;
FIG. 17 is a schematic illustration of the effective vibration geometry center location for one embodiment of the present invention, the diaphragm being elliptical;
FIG. 18 is a schematic illustration of the effective vibration geometry center location for one embodiment of the present invention, the diaphragm being rectangular;
FIG. 19 is a graph of the presence or absence of a damping orifice versus frequency response;
fig. 20 is a graph comparing the frequency response of the two coupling modes of the present invention.
In the drawings, 1 — a bone conduction generating device; 2-a first cavity; 3-a second cavity; 4, vibrating a membrane; 5-an exciter; 6, a bracket; 7-bottom wall; 8, damping holes; 9-side wall; 10-liquid; 11-gas; 12-a magnetic circuit assembly; 13-a coil assembly; 14-a lead; 15-the fixed area between the diaphragm and the support; 16-effective vibration area of the diaphragm; 17-geometric centroid of vibration area of diaphragm; 18-a solid material; 19-a human face; 401 — first side; 402-a second face; 701-the outer surface of the bottom wall; 702-an inner surface of the bottom wall; 901 — the outer surface of the sidewall; 902 — inner surface of sidewall; 903-bearing surface of the sidewall; 910 — projections at the ends of the sidewalls; 911-convex outer surface of the sidewall end; 912-raised inner surfaces at the ends of the sidewalls; 913 — raised connection face at the end of the side wall.
Detailed Description
The technical solution of the present invention will be further described with reference to fig. 1 to 20 according to an embodiment of the present invention.
The invention provides a bone conduction sound production device 1, which comprises a vibrating diaphragm 4, an exciter 5 and a bracket 6;
the vibrating diaphragm 4 is a circular, oval or rectangular film; the vibrating diaphragm 4 is arranged on the bracket 6; the diaphragm 4 has a first side 401 and a second side 402;
a first cavity 2 is arranged between the first surface 401 of the diaphragm 4 and the bracket 6; a second cavity 3 is arranged between the second face 402 of the diaphragm 4 and the bracket 6;
the exciter 5 comprises a magnetic circuit assembly 12 and a coil assembly 13, and the exciter 5 is arranged in the first cavity 2;
the diaphragm 4 is capable of vibrating under the action of the exciter 5.
When the bone conduction sound generating device 1 is connected to an audio playing device, the audio playing device provides a power source and an excitation signal for the exciter 5 in the bone conduction sound generating device 1 through a lead wire, an alternating electrical signal is input to the coil assembly 13, after the coil assembly 13 is electrified with alternating current, alternating electromagnetic force, namely lorentz force, is generated in a permanent magnetic field generated by the magnetic circuit assembly 12, and in addition, the action of the force is mutual, the lorentz force generated by the electrified coil 13 fixed on the support can be transmitted to the magnetic circuit assembly 12 fixed on the vibrating diaphragm 4, so that the vibrating diaphragm 4 vibrates.
When the microphone is worn, the direction of the vibrating diaphragm 4 is attached to a human face, so that air coupling sound transmission is realized; or when the mask is worn, the direction of the bottom wall 7 is attached to the face of a person, so that the cavity wall coupling sound transmission is realized;
air coupling has been full of the air for the space between vibrating diaphragm 4 and the people's face 19, forms a cavity, and under the effect of exciter 5, vibrating diaphragm 4 takes place the vibration, and the vibration of vibrating diaphragm 4 makes the air cavity produce the vibration, forms the sound chamber, passes to the skull and listens the ossicle with sound through the vibration of air cavity, makes the people hear sound. Compared with the prior art, the vibration of the air cavity is transmitted to the skull, the low-frequency response effect is good, the low-frequency content is richer, and the telephone receiver is softer and more comfortable with the skin of the human face.
The chamber wall coupling is diapire 7 directions and the laminating of people's face, and under the effect of exciter 5, vibrating diaphragm 4 takes place the vibration, and the vibration of vibrating diaphragm 4 makes the air cavity produce the vibration, forms the sound chamber, and the vibration in sound chamber is passed to diapire 7, and the vibration of diapire 7 passes to the skull and listens the ossicle with sound through diapire 7, makes the people hear sound. Compared with the prior art, the vibration displacement of the cavity wall coupling is slightly smaller than that of the air coupling, the system rigidity is slightly higher than that of the air coupling, and the characteristic can improve the medium-frequency response effect on the premise of considering low frequency, so that the medium-low frequency content is enriched, and the tone quality is improved.
As a preferred embodiment, the diaphragm 4 is a single-layer or multi-layer film;
the multilayer film includes at least a first layer and a second layer of solid material 18.
As a preferred embodiment, a third layer is further provided between the first and second layer materials, the third layer being a liquid 10, a gas 11 or a solid.
In a preferred embodiment, one of the magnetic circuit assembly 12 and the coil assembly 13 is mounted on the first surface 401 of the diaphragm 4, and the other of the magnetic circuit assembly 12 and the coil assembly 13 is mounted on the inner surface 702 of the bottom wall 7 of the bracket 6; during installation, a mounting groove can be respectively fixed on the first surface 401 of the diaphragm 4 and the inner surface 702 of the bottom wall 7, and the mounting groove is matched with the magnetic circuit component 12 or the coil component 13 to be mounted in the mounting groove;
or the magnetic circuit component 12 and the coil component 13 are packaged and then integrally mounted on the first surface 401 of the diaphragm 4, at this time, the magnetic circuit component 12 and the coil component 13 are packaged in a housing, and the housing is fixed on the first surface 401 of the diaphragm 4, and any fixing mode that does not damage the diaphragm 4, such as a sticking mode, may be adopted for fixing.
In a preferred embodiment, the material of the diaphragm 4 is metal, plastic, silica gel, glass or a composite material; the support is made of metal, plastic, silica gel, glass or composite materials.
The metal as the material of the diaphragm is preferably aluminum, zinc, or the like having approximately young's modulus and yield strength.
The metal as the material of the stent is preferably a metal having a young's modulus and yield strength similar to those of aluminum, zinc, or the like.
In a preferred embodiment, the bracket 6 has a bottom wall 7 and a side wall 9, and a damping hole 8 is arranged on the side wall 9 or the bottom wall 7 of the bracket 6;
through the damping hole 8, when the vibrating diaphragm 4 vibrates, the air in the first cavity 2 can move from the inside to the outside of the first cavity 2 and from the outside to the inside of the first cavity 2, and the flow of the air and the friction between the damping holes 8 form damping in the movement process, in the acoustic field, in order to obtain a wider and flat frequency response curve, the method is realized by changing and adjusting the damping of the vibration system. As shown in the frequency response diagram of fig. 19, it can be seen that the frequency response of the cavity structure with the damping holes is higher than that of the closed cavity, especially in the low frequency band.
As a preferred embodiment of the method of the present invention,
the end part of the side wall 9 is provided with a bulge;
the protrusion 910 at the end of the sidewall has an outer surface 901, an inner surface 902 and a connection surface 913;
the bottom of the protrusion 910 at the end of the sidewall extends inward to form a bearing surface 903 of the sidewall for bearing the edge of the diaphragm 4.
In a preferred embodiment, the second cavity 3 is a semi-closed cavity, and is enclosed by the second face 402 of the diaphragm 4 and a convex inner surface 912 at the end of the sidewall.
In a preferred embodiment, the first cavity 2 is enclosed by an inner surface 702 of the bottom wall 7 of the support 6, an inner surface 902 of the side wall of the support 6 and the first side 401 of the diaphragm 4.
In a preferred embodiment, the frequency response range of the bone conduction sound emitting device 1 includes a frequency of 300Hz or less.
The working principle is as follows:
when wearing, when for 4 directions of vibrating diaphragm and the laminating of people's face 19, the connection face 913 and the laminating of people's face of lateral wall promptly, realize the air coupling, the air coupling is vibrating diaphragm 4, the air has been filled with in the second cavity 3 that the bellied internal surface 902 of lateral wall tip and people's face 19 enclose, form an air cavity, under the effect of exciter 5, vibrating diaphragm 4 vibrates, vibrating diaphragm 4's vibration makes the air cavity produce the vibration, form the acoustic cavity, pass through the air cavity vibration with sound to skull and listen the ossicle, make the people hear the sound. Compared with the prior art, the vibration of the air cavity is transmitted to the skull, the low-frequency response effect is good, the low-frequency content is richer, and the telephone receiver is softer and more comfortable with the skin of the human face.
When wearing, when the diapire 7 for support 6 and the laminating of people's face 19, realize the chamber wall coupling, under the effect of exciter 5, vibrating diaphragm 4 takes place the vibration, and the vibration of vibrating diaphragm 4 makes the air cavity produce the vibration, forms the acoustic cavity, and the vibration in acoustic cavity is passed to diapire 7, and the vibration of diapire 7 passes to the skull and listens the ossicle with sound through diapire 7, makes the people hear sound. Compared with the prior art, the vibration displacement of the cavity wall coupling is slightly smaller than that of the air coupling, the system rigidity is slightly higher than that of the air coupling, and the characteristic can improve the medium-frequency response effect on the premise of considering low frequency, so that the medium-low frequency content is enriched, and the tone quality is improved.
As shown in fig. 20, which is a frequency response comparison diagram of two coupling modes of the present invention, a scheme with a damping hole is adopted, the damping hole is an aluminum film with a diameter of 0.5mm, a pore depth of 0.15mm, and a diaphragm with a thickness of 0.03-0.05 mm. As can be seen from the figure:
1. the bottom wall direction is attached to a human face, so that the medium-frequency and low-frequency responses are better, and particularly the medium-frequency response is improved;
2. the laminating direction is attached to the face of a person, and the low-frequency response is better.
Example 1
The invention is described in detail with reference to fig. 1, 4 and 7, and fig. 14 and 16, according to an embodiment of the invention. In this embodiment, bone conduction sound generating mechanism includes vibrating diaphragm, support and exciter, and the exciter formula structure as an organic whole, and the exciter is installed on the geometric shape heart of the effective vibration region on the internal surface of vibrating diaphragm, and the vibrating diaphragm is circular shape multilayer structure, and this multilayer structure is the solid structure that solid material and solid material combine, and among the multilayer structure, the solid material of each layer is the same, is the metal material, preferably, chooses for use aluminium or zinc, also can adopt other metals that have similar young modulus, and the cavity that vibrating diaphragm and support enclose is closed.
For vibrating diaphragm direction and face laminating, realize the air coupling when this bone conduction sound generating mechanism wears, enclose into an air cavity between vibrating diaphragm and face. When the bone conduction sound-generating device 1 is connected to an audio playing device, the audio playing device provides a power source for the exciter 5 in the bone conduction sound-generating device 1 through a lead wire, an electric signal is transmitted into the coil component 13, after the coil component 13 is electrified with alternating current, alternating electromagnetic force, namely lorentz force, is generated in a permanent magnetic field generated by the magnetic circuit component 12, and in addition, the action of the force is mutual, the lorentz force generated by the electrified coil 13 fixed on the support can be transmitted to the magnetic circuit component 12 fixed on the vibrating diaphragm 4, so that the vibrating diaphragm 4 vibrates. After the vibrating diaphragm 4 vibrates, the air cavity enclosed between the vibrating diaphragm 4 and the human face generates vibration, the cavity vibration is transmitted to the skin and the skull of a person, and then the auditory ossicle is transmitted to the auditory nerve, so that the person hears sound.
Example 2
The invention will be described in detail with reference to fig. 1, 6 and 7, and fig. 14, 16 and 19, according to an embodiment of the invention. In this embodiment, the bone conduction sound generating apparatus is different from embodiment 1 in that a damping hole is provided on a side wall of a bracket, in this embodiment, in order to improve the frequency response performance of an intermediate frequency (300hz to 1000hz) while considering the content of a low frequency (20hz to 300hz), the size of the damping hole is 0.5mm in diameter, and the depth of a pore channel is 0.15mm, the working principle is similar to that of embodiment 1, but due to the arrangement of the damping hole, the damping of an air cavity surrounded by a diaphragm 4 and the bracket 6 is increased, so that the low frequency response is obviously improved, according to the frequency response diagram of fig. 19.
Example 3
The invention will be described in detail with reference to fig. 1, 6 and 8, and fig. 14, 16 and 19, according to an embodiment of the invention. In this embodiment, the bone conduction sound-generating device is different from embodiment 2 in that the diaphragm is a 3-layer film and has a solid-liquid-solid structure, the liquid is located in a cavity surrounded by two layers of solid materials, the solid material is an aluminum film with a thickness of 0.03-0.05 mm, or other similar materials with a young's modulus and a yield strength can be selected, the liquid is water, or other non-corrosive liquids can be used, when the bone conduction sound-generating device 1 is connected to an audio playing device, the audio playing device provides a power source for the exciter 5 in the bone conduction sound-generating device 1 through a lead wire, an electric signal is transmitted to the coil assembly 13, after the coil assembly 13 is energized with an alternating current, an alternating electromagnetic force, that is, a lorentz force, is generated in a permanent magnetic field generated by the magnetic circuit assembly 12, and the lorentz force generated by the energizing coil 13 fixed on the support is mutually transmitted to the magnetic circuit assembly 12 fixed on the diaphragm 4, and then make vibrating diaphragm 4 produce the vibration, because the existence of vibrating diaphragm inlayer liquid for vibrating diaphragm frequency response can be according to liquid material different with how much and adjusted, the vibrating diaphragm vibration makes the air cavity that encloses between vibrating diaphragm 4 and the people face again to produce the vibration this moment, and the cavity vibration reaches people's skin, skull, and then reaches and listens the ossicle, reaches and listens the nerve, makes the people hear the sound, and then obtains the receiving effect that can customize.
Example 4
The invention will be described in detail with reference to fig. 1, 6 and 9, and fig. 14, 16 and 19, according to an embodiment of the invention. In this embodiment, the bone conduction sound generating apparatus is different from embodiment 2 in that the diaphragm is a 3-layer film and has a solid-gas-solid structure, the gas is located in a cavity surrounded by two layers of solid materials, and the solid material is selected to have a thickness of 0.03mm
0.05mm aluminum film, other similar materials with approximate Young's modulus and yield strength can be selected, and air is selected as gas, so that the material is convenient to obtain. When the bone conduction sound-producing device 1 is connected to an audio-playing device, the audio-playing device provides a power source for the exciter 5 in the bone conduction sound-producing device 1 through a lead wire, an alternating electric signal is transmitted into the coil component 13, after the coil component 13 is electrified with alternating current, alternating electromagnetic force, namely Lorentz force, is generated in a permanent magnetic field generated by the magnetic circuit component 12, and in addition, because the forces are mutual, the Lorentz force generated by the electrified coil 13 fixed on the bracket can be transmitted to the magnetic circuit component 12 fixed on the vibrating diaphragm 4, so that the vibrating diaphragm 4 generates vibration, and because of the existence of gas in the inner layer of the vibrating diaphragm, the frequency response of the vibrating diaphragm can be adjusted according to the amount of air, at the moment, the vibrating diaphragm vibrates, so that an air cavity enclosed between the vibrating diaphragm 4 and a human face generates vibration, and the cavity vibration is transmitted to the skin and the skull of a, the voice can be heard, and the customized receiving effect can be obtained.
Example 5
The invention will be described in detail with reference to fig. 9, fig. 10, fig. 11, and fig. 14, fig. 16, and fig. 19, according to an embodiment of the present invention. In this embodiment, the bone conduction sound generating apparatus is different from embodiment 4 in that a magnetic circuit component of the exciter is installed on an inner surface of the vibrating diaphragm, a coil component is installed on an inner surface of the bottom wall, the magnetic circuit component and the coil component are both installed in installation grooves of the vibrating diaphragm and the inner surface of the bottom wall, the installation grooves are respectively fixedly connected with the vibrating diaphragm and the inner surface of the bottom wall, in this embodiment, a pasting mode is selected for fixing, gluing can be adopted for pasting, fixing threads can also be processed on the inner surface of the bottom wall, threaded holes matched with the fixing threads are also processed on the installation grooves fixed on the fixing grooves, and the installation grooves. The magnetic circuit component and the coil component are installed in the installation grooves in a sticking mode, of course, threads for fixing can be machined in any installation groove, threaded holes matched with the coil component or the magnetic circuit component are machined in the coil component or the magnetic circuit component, and the coil component or the magnetic circuit component is fixed by bolts.
Example 6
The invention will be described in detail with reference to fig. 9, fig. 12, fig. 13, and fig. 14, fig. 16, and fig. 19, in accordance with an embodiment of the present invention. In this embodiment, the bone conduction sound generating mechanism is different from embodiment 5 in that the coil component is installed on the inner surface of the vibrating diaphragm, the magnetic circuit component is installed on the inner surface of the bottom wall, the coil component and the magnetic circuit component are installed in the installation grooves of the vibrating diaphragm and the inner surface of the bottom wall, the installation grooves are respectively fixedly connected with the vibrating diaphragm and the inner surface of the bottom wall, the embodiment selects the pasting mode to fix, the pasting mode can be adopted, fixing threads can be processed on the inner surface of the bottom wall, threaded holes matched with the fixing threads are processed on the installation grooves fixed on the fixing grooves, and the installation grooves are fixed by bolts. The magnetic circuit component and the coil component are installed in the installation grooves in a sticking mode, of course, threads for fixing can be machined in any installation groove, threaded holes matched with the coil component or the magnetic circuit component are machined in the coil component or the magnetic circuit component, and the coil component or the magnetic circuit component is fixed by bolts.
Example 7
The invention will be described in detail with reference to fig. 9, fig. 12, fig. 13, and fig. 14, fig. 17, and fig. 19, in accordance with an embodiment of the present invention. In this embodiment, the bone conduction sound generating apparatus is different from embodiment 6 in that the shape of the diaphragm is an ellipse, and accordingly, the cross section of the bracket is also an ellipse to be connected with the diaphragm in a matching manner.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications, combinations and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Example 8
The invention will be described in detail with reference to fig. 9, fig. 12, fig. 13, and fig. 14, fig. 18, and fig. 19, in accordance with an embodiment of the present invention. In this embodiment, the bone conduction sound generating apparatus is different from embodiment 6 in that the diaphragm is rectangular, and accordingly, the cross section of the bracket is also rectangular to be connected with the diaphragm in a matching manner.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications, combinations and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A bone conduction sound production device is characterized by comprising a vibrating diaphragm, an exciter and a bracket;
the vibrating diaphragm is a circular, oval or rectangular film; the vibrating diaphragm is arranged on the bracket; the diaphragm is provided with a first surface and a second surface;
a first cavity is arranged between the first surface of the diaphragm and the bracket; a second cavity is arranged between the second side of the diaphragm and the bracket;
the exciter comprises a magnetic circuit component and a coil component, and is arranged in the first cavity;
the diaphragm can vibrate under the action of the exciter.
2. The bone conduction sound emitting apparatus according to claim 1, wherein the diaphragm is a single layer or a multilayer film; the multilayer film includes at least a first layer and a second layer, the first and second layers being solid materials.
3. A bone conduction sound emitting device according to claim 2, wherein a third layer is further provided between the first and second layers of material, the third layer being liquid, gas or solid.
4. The bone conduction sound emitting apparatus of claim 1,
one of the magnetic circuit component and the coil component is arranged on the first surface of the diaphragm, and the other of the magnetic circuit component and the coil component is arranged on the inner surface of the bottom wall of the bracket;
or the magnetic circuit component and the coil component are packaged and then integrally installed on the first surface of the vibrating diaphragm.
5. The bone conduction sound-emitting device according to claim 1, wherein the material of the diaphragm is metal, plastic, silica gel, glass or composite material; the support is made of metal, plastic, silica gel, glass or composite materials.
6. The bone conduction sound generator of claim 1, wherein the support has a bottom wall and a side wall, and a damping hole is provided on the side wall or the bottom wall of the support.
7. The bone conduction sound generator of claim 6, wherein the end of the side wall has a protrusion;
the bulge at the end part of the side wall is provided with an outer surface, an inner surface and a connecting surface;
the bottom of the bulge at the end part of the side wall extends inwards to form a bearing surface of the side wall and is used for bearing the edge of the vibrating diaphragm.
8. The bone conduction sound generator of claim 7, wherein the second cavity is a semi-closed cavity, bounded by the second face of the diaphragm and a convex inner surface of the sidewall end.
9. The bone-conduction sound generating apparatus of claim 7, wherein the first cavity is enclosed by an inner surface of the bottom wall of the bracket, an inner surface of the side wall of the bracket, and the first face of the diaphragm.
10. The bone conduction sound generator of claim 1, wherein the frequency response range of the bone conduction sound generator comprises frequencies below 300 Hz.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011459320.5A CN112367596A (en) | 2020-12-11 | 2020-12-11 | Bone conduction sound production device |
| CN202110238430.7A CN112911468B (en) | 2020-12-11 | 2021-03-04 | Osteoacusis sound generating mechanism and wearable equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011459320.5A CN112367596A (en) | 2020-12-11 | 2020-12-11 | Bone conduction sound production device |
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| CN202011459320.5A Pending CN112367596A (en) | 2020-12-11 | 2020-12-11 | Bone conduction sound production device |
| CN202110238430.7A Active CN112911468B (en) | 2020-12-11 | 2021-03-04 | Osteoacusis sound generating mechanism and wearable equipment |
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| CN202110238430.7A Active CN112911468B (en) | 2020-12-11 | 2021-03-04 | Osteoacusis sound generating mechanism and wearable equipment |
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| WO2022193426A1 (en) * | 2021-03-19 | 2022-09-22 | 苏州索迩电子技术有限公司 | Bone conduction sounding apparatus and wearable device |
| WO2023039907A1 (en) * | 2021-09-18 | 2023-03-23 | 苏州索迩电子技术有限公司 | Bone conduction earphone and method for assembling bone conduction earphone |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112911468A (en) | 2021-06-04 |
| CN112911468B (en) | 2022-06-14 |
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