CN115209303B - Bone conduction earphone and manufacturing method thereof - Google Patents
Bone conduction earphone and manufacturing method thereof Download PDFInfo
- Publication number
- CN115209303B CN115209303B CN202211030684.0A CN202211030684A CN115209303B CN 115209303 B CN115209303 B CN 115209303B CN 202211030684 A CN202211030684 A CN 202211030684A CN 115209303 B CN115209303 B CN 115209303B
- Authority
- CN
- China
- Prior art keywords
- vibrating
- cavity
- bone conduction
- vibrator
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 82
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000009434 installation Methods 0.000 claims abstract description 16
- 239000003292 glue Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 description 11
- 230000005855 radiation Effects 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 108090000565 Capsid Proteins Proteins 0.000 description 5
- 210000000860 cochlear nerve Anatomy 0.000 description 4
- 210000003625 skull Anatomy 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000000845 cartilage Anatomy 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 210000003027 ear inner Anatomy 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 210000003582 temporal bone Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- H04R1/105—Earpiece supports, e.g. ear hooks
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
The application discloses a bone conduction earphone and a manufacturing method thereof, the bone conduction earphone comprises a shell and a bone conduction structure arranged in the shell, the shell is provided with a front shell and a rear shell, the front shell is connected with the rear shell to form an installation cavity, the surface of the front shell is provided with a vibrating part which is used for being attached to skin, the bone conduction structure is provided with a vibrator main body and a vibrator vibrating piece, the vibrator vibrating piece and the vibrating part are arranged at intervals to form a vibrating cavity, the vibrating cavity is used for transmitting the vibrating acting force of the vibrator vibrating piece to the vibrating part, the cavity formed by surrounding the front shell is a vibrating front cavity, the cavity formed by surrounding the rear shell is a vibrating rear cavity, the cavity volume of the vibrating front cavity is smaller than the cavity volume of the vibrating rear cavity, the vibrating acting force of the vibrator vibrating piece can be more completely transmitted to the vibrating part under the sound conduction effect of the vibrating cavity, and the earphone has less leakage sound and stronger privacy due to the volume ratio of the front shell and the rear shell cavity.
Description
Technical Field
The application relates to the technical field of speakers, in particular to a bone conduction earphone and a manufacturing method thereof.
Background
The bone vibrator is a transducer for converting electric oscillation into mechanical vibration, the basic principle of the bone vibrator monomer is moving magnetic type, the bone vibrator monomer generally comprises a shell, a magnet, U iron, a voice coil, a positioning spring piece, a vibrator vibration piece, a PCB adapter plate and the like, wherein the U iron and the magnet are bonded to form a magnetic circuit structure, the outer edge of the positioning spring piece is arranged in the shell, the inner edge of the positioning spring piece is connected with the outer edge of the vibrator vibration piece, the bottom of the vibrator vibration piece is connected with the U iron again, and a complete suspension system is formed, wherein the weight of the magnetic circuit structure and the vibrator vibration piece is the vibration mass of the suspension system.
In general, a bone conduction earphone uses a bone vibrator unit as a sound unit of the earphone, and like other electric speaker units, the bone vibrator unit is installed inside the earphone shell and transmits energy by being connected with the earphone shell.
The output of bone vibrator monomer energy is connected with the earphone shell wall through a component vibrator vibrating piece (or elastic silica gel is arranged on the earphone shell) and is transmitted to the whole earphone shell, and the earphone shell is in contact with the skull bone to conduct amplified sound to the inner ear to stimulate auditory nerve to sense sound in a mechanical vibration mode.
The vibration force is connected with the skull to sense the sound, namely bone conduction transmission; in addition, the vibration force is connected with the cavity (box) to generate resonance, the cavity radiates sound waves, the sound waves are heard by others through air propagation, the privacy is not strong, and the air conduction transmission leakage sound is large.
In the related art, when the component vibrator vibrating piece is connected with the earphone shell (such as bonding or buckling), the top support of the vibrator vibrating piece is connected with the earphone shell, and the suspension system is bound by the connecting force of the earphone shell. During resonance, the earphone shell is increased in reverse pre-compression, the force resistance is increased, the vibration mass is increased, the amplitude (displacement) of the bone vibrator is small, the energy transmission loss is large, the vibration sense is small, and the tone quality performance is poor.
In addition, the bone conduction earphone senses sound through the vibration of the skull, the difference between the skull and the voice signal transmission channel medium of the auditory canal is larger, compared with the air conduction voice, the bone conduction voice has the inherent defects of heavy low-frequency components, serious attenuation of high-frequency components, clunkness of sound and the like, and is not beneficial to the representation of the sound, and further optimization is needed.
Disclosure of Invention
In order to solve the technical problems, the application provides a bone conduction earphone and a manufacturing method thereof.
In a first aspect, the present application provides a bone conduction headset, which adopts the following technical scheme:
a bone conduction headset comprising:
a shell, which is provided with a front shell and a rear shell, wherein the front shell is connected with the rear shell to form an installation cavity, a vibration part for adhering to the skin is formed on the surface of the front shell;
The bone conduction structure is arranged in the installation cavity and is provided with a vibrator main body and a vibrator vibrating plate, the vibrator vibrating plate and the vibrating part are arranged at intervals to form a vibrating cavity, and the vibrating cavity is used for transmitting the vibrating acting force of the vibrator vibrating plate to the vibrating part;
the front shell encloses the cavity that forms and is the vibration front chamber, the back shell encloses the cavity that forms and is the vibration back chamber, the cavity volume in vibration front chamber is less than the cavity volume in vibration back chamber.
Based on the technical scheme, when the earphone operates, the vibrator main body in the bone conduction structure is used as a driving source to drive the vibrator vibrating plate to vibrate, and when the vibrator vibrating plate vibrates, air in the vibrating cavity generates vibration waves which are transmitted to the vibrating part, and the vibrating part transmits sound to the auditory system of a human body. Because the front housing encloses the volume of the vibration front chamber that forms and is less than the back housing encloses the volume of the vibration back chamber that forms, front chamber air volume is less than back chamber air volume, and front chamber air elastic force is higher than back chamber, and current chamber force is transmitted in back chamber, and the power is weakened by back chamber, and the sound wave that front chamber resonance produced is weakened by back chamber, and sound intensity weakens, reduces traditional bone conduction earphone problem of leaking sound. Therefore, the vibrating force of the vibrator vibrating plate can be transmitted to the vibrating part through the more complete front cavity, the sound transmission effect is better, and the earphone has fewer sound leakage and stronger privacy due to the volume ratio of the front shell and the rear shell.
Preferably, the surface along the thickness direction of the housing is a cross section, and the cross section area of the front housing is smaller than the cross section area of the rear housing, so that the effective vibration area of the front housing is smaller than the effective vibration area of the rear housing.
Based on the technical scheme, the vibrator vibrating piece vibrating action force is in the front housing, the rear housing is connected with the front housing, the force is transferred in the front housing to output vibrating force radiation forward sound wave, the front housing is connected with the rear housing, the force is transferred in the rear housing, inertia force is generated to radiate backward sound wave, vibrating force generated by the front housing is opposite to the inertia force generated by the rear housing, when the sound waves meet and offset each other, the sound intensity is weakened, the leakage sound is reduced, the effective vibrating area of the front housing is smaller than the vibrating area of the rear housing, and the leakage sound is reduced when the vibration force is output.
Preferably, the ratio of the effective vibration area of the front housing to the effective vibration area of the rear housing is 1:2-4.
Preferably, the ratio of the cavity volume of the vibrating front cavity to the cavity volume of the vibrating rear cavity is 1:2-4.
Preferably, a mounting ring plate is arranged in the front shell, a step groove is formed in the inner wall of the mounting ring plate, and the vibrator main body is clamped with the step groove to block a conduction space between the vibrator vibrating plate and the rear shell.
Based on the above-mentioned technical scheme, the oscillator main part is connected with the installation annular plate on the procapsid, consequently, the vibration chamber is formed by the inner wall combination of oscillator main part and installation annular plate, makes the oscillator piece be located the vibration intracavity, and the vibration of oscillator piece is diffused to on vibrating portion and the procapsid by the vibration chamber, and the oscillator main part has obstructed the conduction space between oscillator piece and the backshell, and consequently the transmission of sound is more fidelity, and sound transmission effect is better, and low frequency and high frequency transmission effect are also better.
Preferably, the step groove is parallel to the vibrating portion so that the vibrator diaphragm is parallel to the vibrating portion.
Based on the technical scheme, the step groove is parallel to the vibrating part, so that the parallelism of the vibrator vibrating plate and the vibrating part can be guaranteed when the vibrator vibrating plate vibrates, the vibration frequency of the vibrator vibrating plate can be better transferred to the vibrating part, the vibration force is more uniformly transferred to each part of the vibrating part, and the bone conduction effect is better.
Preferably, the mounting ring plate is provided with a clamping protrusion, the rear housing is provided with a clamping groove, and the clamping protrusion is clamped with the clamping groove so that the front housing is clamped with the rear housing.
Based on the technical scheme, the clamping protrusion on the mounting ring plate can be matched with the clamping groove on the rear shell in a clamping manner, so that the front shell is clamped with the rear shell, the front shell and the rear shell can be clamped, and meanwhile, the front shell and the rear shell are assembled in a simple and easy manner.
Preferably, a limit post is arranged in the front shell, a limit lantern ring is arranged in the rear shell, and the limit post is in plug-in fit with the limit lantern ring.
Based on above-mentioned technical scheme, when preceding casing and back casing looks joint cooperation, spacing post and the mutual joint cooperation of spacing lantern ring can play the guide effect when assembly earphone procapsid and back casing, and the assembly of procapsid and back casing is difficult to take place the dislocation, also can make the assembly connection of earphone procapsid and back casing inseparabler simultaneously.
In a second aspect, the present application provides a method for manufacturing a bone conduction headset, which adopts the following technical scheme:
a method of manufacturing a bone conduction headset, comprising the steps of:
installing a bone conduction structure, and installing the bone conduction structure into the front shell;
Dispensing, namely coating glue on the connection position of the bone conduction structure and the front shell;
and installing a rear shell, and installing the rear shell on the front shell to enable the rear shell to be clamped with the front shell.
Preferably, in the step of installing the bone conduction structure, the opening side of the front housing is directed upward.
Based on the technical scheme, the bone conduction earphone is simpler in structure, simpler in assembly process, lower in assembly difficulty and lower in assembly precision requirement on each part of the earphone, and therefore the yield of the earphone is higher.
In summary, the present application includes at least one of the following beneficial technical effects:
1. The front cavity volume of the vibration formed by enclosing the front shell is smaller than the back cavity volume of the vibration formed by enclosing the back shell, the front cavity air volume is smaller than the back cavity air volume, the front cavity air elastic force is higher than the back cavity, the current cavity force is transmitted in the back cavity, the force is weakened by the back cavity, the sound wave generated by front cavity resonance is weakened by the back cavity, the sound intensity is weakened, and the problem of traditional bone conduction earphone leakage is reduced. Therefore, the vibration acting force of the vibrator vibrating plate can be more completely transmitted to the vibration part through the front cavity, the sound transmission effect is better, and the earphone has less sound leakage and stronger privacy due to the volume ratio of the front shell and the rear shell cavity;
2. The vibrating force of the vibrator vibrating plate is applied to the front shell, the rear shell is connected with the front shell, the force is transmitted to the front shell to output vibrating force to radiate forward sound waves, the front shell is connected with the rear shell, the force is transmitted to the rear shell, the inertial force is generated to radiate backward sound waves, the vibrating force generated by the front shell is opposite to the inertial force generated by the rear shell, when the sound waves meet and cancel each other, the sound intensity is weakened, the sound leakage is reduced, and the effective vibrating area of the front shell is smaller than the vibrating area of the rear shell, so that the vibration force output is benefited, and meanwhile the sound leakage is reduced;
3. The bone conduction earphone has a simple structure, simple steps when the earphone is assembled, and low requirement on the assembly precision of the earphone, so that the assembly yield of the earphone can be ensured.
Drawings
Fig. 1 is a schematic diagram showing the overall structure of a bone conduction headset;
Fig. 2 is a schematic diagram showing an exploded structure of a bone conduction headset;
FIG. 3 is a schematic diagram showing the structure of FIG. 2 from different angles;
fig. 4 is a front view showing the structure of the bone conduction headset;
FIG. 5 is a cross-sectional view of the structure of FIG. 4 in the direction A-A;
fig. 6 is a graph showing frequency response curves of different effective vibration area ratios of the front case/the rear case in the bone conduction headset according to the present embodiment.
Reference numerals illustrate:
01. A first curve; 02. a second curve; 03. a third curve; 04. a fourth curve; 10. a housing; 11. a front housing; 11a, a vibration part; 12. a rear housing; 13. installing a ring plate; 13a, step groove; 13b, guiding ring grooves; 14. a vibration chamber; 15. a limit column; 16. a limit collar; 20. a bone conduction structure; 21. a vibrator body; 22. a vibrator vibrating plate; 30. a clamping protrusion; 40. and a clamping groove.
Detailed Description
The application is described in further detail below with reference to fig. 1-6.
The embodiment of the application discloses a bone conduction earphone.
Referring to fig. 1, the bone conduction earphone includes a case 10, the case 10 is a bone conduction earphone case 10, the case 10 includes a front case 11 and a rear case 12 which are engaged with each other, a vibration part 11a is formed on a surface of the front case 11, the vibration part 11a is in contact with a temporal bone and a jaw bone in front of an external auditory meatus, and a sound is transmitted to an auditory nerve of a user by bone conduction.
Referring to fig. 2, the front case 11 and the rear case 12 are connected to form an installation chamber, a bone conduction structure 20 is installed in the installation chamber, the bone conduction structure 20 includes a vibrator main body 21 and a vibrator diaphragm 22, and the vibrator main body 21 provides driving force for the vibrator diaphragm 22 so that the vibrator diaphragm 22 vibrates.
Referring to fig. 3, a mounting ring plate 13 is integrally formed in the front case 11, a stepped groove 13a is formed in the inner wall of the mounting ring plate 13, and the vibrator body 21 is mounted in the mounting ring plate 13 and engaged with the stepped groove 13 a.
Referring to fig. 4 and 5, the vibrator tab 22 is spaced from the vibration part 11a, that is, a certain distance is provided between the vibrator tab 22 and the vibration part 11a, and the vibrator tab 22 and the vibration part 11a form a vibration cavity 14 therebetween, and the vibrator tab 22 transmits a vibration force to the vibration part 11a through the vibration cavity 14 during vibration, and the vibration force is transmitted to an auditory nerve of a human body through the vibration part 11 a.
Since the vibrator diaphragm 22 vibrates in the vibration cavity 14, the vibration of the vibrator diaphragm 22 is not restricted by the case 10, and the structure prevents the case 10 from directly adhering to the vibrator diaphragm, and the vibrator diaphragm is not restricted by the structure of the case 10, and preferably restores an electric frequency signal. The vibrating piece feedback force drives the shell 10 to vibrate to form a vibration transmission sound source of the traditional vibrator, and meanwhile, the vibration part 11a vibrates to drive air in the vibration cavity 14 to vibrate to form a sound similar to a gas-guide loudspeaker, so that sound quality is better, and the defects of low frequency and high frequency of bone conduction are overcome.
Meanwhile, the vibration force of the vibrator vibrating plate 22 acts on the front shell 11, the vibration force acting on the front shell 11 radiates forward sound waves, the front shell 11 is connected with the rear shell 12, the acting force of the front shell 11 is transmitted to the rear shell 12, the rear shell 12 generates inertial force to radiate backward sound waves, the vibration force generated by the front shell 11 is opposite to the inertial force generated by the rear shell 12, and when the sound waves meet and cancel each other, the sound intensity is weakened, and the leakage sound is reduced.
Referring to fig. 2 and 3, the front case 11 is integrally formed with a locking protrusion 30, the rear case 12 is provided with a locking groove 40, the locking protrusion 30 is adapted to the shape and size of the locking groove 40, and the locking protrusion 30 is locked to the locking groove 40 to lock the front case 11 to the rear case 12. At least two groups of clamping bulges 30 and clamping grooves 40 are correspondingly arranged, and three groups of clamping bulges 30 and clamping grooves 40 are arranged at intervals in the embodiment, so that the clamping tightness of the front shell 11 and the rear shell 12 is ensured.
Referring to fig. 3, one end of the installation ring plate 13 is opened, the vibrator body 21 is assembled at one end of the installation ring plate 13 close to the opening, a guide ring groove 13b is further formed at one side of the installation ring plate 13 close to the opening, and a guide inclined plane is formed at one side of the guide ring groove 13b, so that convenience and rapidness are achieved in assembling the vibrator body 21.
The mounting ring plate 13 and the front shell 11 are integrally injection molded, so that the parallelism of the step groove 13a and the vibration part 11a can be accurately ensured in the injection molding process, and the parallelism of the vibrator vibrating piece 22 and the vibration part 11a can be ensured when the vibrator main body 21 and the step groove 13a are assembled. Therefore, the vibrator main body 21 can maintain the same vibration frequency as the vibration portion 11a during vibration, and the vibration waveform is substantially the same, so that the sound guiding effect of the vibrator patch 22 is improved.
Referring to fig. 3, the front housing 11 is integrally formed with a limit post 15, the rear housing 12 is integrally formed with a limit collar 16, the limit post 15 is in plug-in fit with the limit collar 16, and when the front housing 11 is in clamping connection with the rear housing 12, the limit post 15 and the limit collar 16 can play a role in limiting and fixing the front housing 11 and the rear housing 12, so that connection tightness between the front housing 11 and the rear housing 12 can be ensured.
Further, the cavity formed by enclosing the front shell 11 is a vibrating front cavity, the cavity formed by enclosing the rear shell 12 is a vibrating rear cavity, and the cavity volume of the vibrating front cavity is smaller than that of the vibrating rear cavity. Specifically, the ratio of the cavity volume of the vibrating front cavity to the cavity volume of the vibrating rear cavity is 1:2-4.
The cross-sectional area of the front case 11 is smaller than the cross-sectional area of the rear case 12 with the center line in the overall width direction of the earphone as a cross-section, so that the effective vibration area in the front case 11 is smaller than the effective vibration area of the rear case 12. The ratio of the effective vibration area of the front case 11 to the effective vibration area of the rear case 12 is 1:2-4.
Referring to fig. 6, fig. 6 illustrates the frequency response curves of the bone conduction headphones in four different states of the effective vibration area ratio of the front shell/the rear shell, and the analysis of the frequency response curves of the bone conduction headphones in fig. 6 shows that:
Specifically, when the effective vibration area ratio of the front housing 11 to the effective vibration area ratio of the rear housing 12 is 1:4, the earphone frequency response curve representing the effective vibration area ratio is a first curve 01, resonance is generated in the housing near the frequency 170HZ, the sound pressure level of the force generated by the resonance is about 100dB, and the vibration force output is higher. The flattest frequency response curve is obtained at the middle frequency range 600HZ-1.2KHZ, the relative distortion degree is smaller, the flatter frequency response curve is obtained at the middle and high frequency range 2KHZ-3.5KHZ, and the peak and valley of the fluctuation are avoided, so that the mutual cancellation of the sound radiation sound waves of the front shell 11 and the rear shell 12 is reasonable, the sound pressure level is about 100dB, the sound pressure level is equal to the force sound pressure level generated by the resonance of the box body nearby 70HZ, and the high, middle and low frequency components are sufficient. Through subjective hearing, bone conduction vibration output force is enough, and low-frequency response is light and fast, and medium frequency perception sound is clear full, and the distortion is little, and signal to noise ratio is high, and the sound wave external sound sense of box resonance radiation is less, and the leakage is little, and privacy is outstanding.
In other embodiments, the ratio of the effective vibration area of the front housing 11 to the effective vibration area of the rear housing 12 is 1:3, the earphone frequency response curve representing the effective vibration area ratio is the second curve 02, the housing resonates near the frequency 170HZ, the force sound pressure level generated by the resonance is about 103dB, the vibration force output is highest, the frequency response curve is relatively uneven in the middle frequency band 600HZ-1.2KHZ, the peak-valley with high and low fluctuation is high, and the relative distortion is high, which indicates that the sound radiation sound waves of the front housing and the rear housing cancel each other slightly worse.
The relatively flat frequency response curve is obtained at the middle-high frequency band of 2KHZ-3.5KHZ, but the sound pressure level is about 93dB, and when the effective vibration area ratio of the front shell to the rear shell is 1:4 compared with the first curve 01 in fig. 6, the obtained sound pressure level is slightly smaller, the intermediate frequency component is weaker, the bone conduction vibration output force is enough through subjective hearing, the low-frequency reaction is light and rapid, the low-frequency sensing sound is thicker, the intermediate frequency is darker and not bright enough, the sound wave external sound feeling of the box body resonance radiation is slightly larger, the leakage sound is slightly larger, and the privacy is good.
In other embodiments, the ratio of the effective vibration area of the front housing 11 to the effective vibration area of the rear housing 12 is 1:2, the earphone frequency response curve representing the effective vibration area ratio is the third curve 03, the housing resonates near the frequency 170HZ, the force sound pressure level generated by the resonance is about 94dB, the vibration force output is weaker, the frequency response curve is relatively uneven in the middle frequency band 600HZ-1.2KHZ, and has a raised peak with a larger relative distortion, which indicates that the sound radiation sound waves of the front housing and the rear housing cancel each other slightly worse. Through subjective hearing, bone conduction vibration output force is enough, low-frequency response force is weak, medium-low frequency perception sound is thick and heavy, medium frequency is dark, sound wave external sound hearing of box resonance radiation is large, leakage sound is large, and privacy is general.
In order to sufficiently compare the effective vibration area ratios of the front shell and the rear shell, which are different in the above embodiments, the fourth curve 04 in fig. 6 represents that the effective vibration area ratio of the front shell and the rear shell is 2:1, the box body resonates near the frequency 170HZ, the force sound pressure level generated by the resonance is about 82dB, the vibration force output is extremely weak, the frequency response in the middle frequency band 600HZ-1.2KHZ has a raised peak, the distortion degree is large, which indicates that the sound radiation sound waves of the front shell 11 and the rear shell 12 cancel each other extremely poorly, the bone conduction vibration output force is extremely weak through subjective hearing, the low frequency reaction force is extremely weak, the middle-low frequency sensing sound is extremely thick, the housing 10 buzzing resonance is serious, the sound wave external sound feeling of the resonance radiation of the housing 10 is large, the leakage sound is large, and the privacy is poor.
From the above analysis, as the effective vibration area ratio of the front case/rear case increases, the forward wave generated by the vibration of the front case 11 of the bone conduction headset and the backward wave generated by the rear case 12 cancel each other out and decrease gradually, the leakage sound increases gradually, the privacy deteriorates, and the sound guiding performance of the bone conduction headset deteriorates gradually. Therefore, the effective vibration area ratio of the front shell to the rear shell is 1:4 & gt 1:3 & gt 1:2, namely the effective vibration area of the front shell 11 is smaller than that of the rear shell 12, so that the vibration force output is benefited, and meanwhile, the leakage sound is reduced.
The implementation principle of the bone conduction earphone provided by the embodiment is as follows: the bone conduction earphone is worn at the cartilage position near the auditory canal of the human body when in use and is tightly attached to the cartilage. When the bone conduction earphone is started, the vibrator main body 21 drives the vibrator vibrating plate 22 to vibrate, and the vibrator vibrating plate 22 transmits vibration waves to the vibration part 11a by the vibration cavity 14 during vibration, so that the vibration part 11a vibrates synchronously, and therefore sound can be transmitted to the auditory nerve of a human body.
Since the vibrator diaphragm 22 vibrates in the vibration cavity 14, the vibration of the vibrator diaphragm 22 is not restricted by the case 10, and the structure prevents the case 10 from directly adhering to the vibrator diaphragm, and the vibrator diaphragm is not restricted by the structure of the case 10, and preferably restores an electric frequency signal. The vibrating piece feedback force drives the shell 10 to vibrate to form a vibration transmission sound source of the traditional vibrator, and meanwhile, the vibration part 11a vibrates to drive air in the vibration cavity 14 to vibrate to form a sound similar to a gas-guide loudspeaker, so that sound quality is better, and the defects of low frequency and high frequency of bone conduction are overcome.
And because the effective vibration area of the front shell 11 is smaller than that of the rear shell 12, the effective vibration area of the front shell is smaller than that of the rear shell, so that the vibration force output is benefited, and meanwhile, the leakage sound is reduced.
The embodiment of the application also discloses a manufacturing method of the bone conduction earphone. The manufacturing method of the bone conduction earphone comprises the following steps:
The bone conduction structure 20 is installed, the open end of the front shell 11 faces upwards, the bone conduction structure 20 is installed in the installation annular plate 13 in the front shell 11, the front shell 11 and the installation annular plate 13 are integrally formed, the front shell 11 and the installation annular plate 13 can be formed in an injection molding mode, and the production mode has the advantage that the precision of the front shell 11 can be fully guaranteed only by guaranteeing the precision of a die. The step groove 13a on the mounting ring plate 13 and the guide ring groove 13b are also integrally injection molded, so that the parallelism of the step groove 13a on the mounting ring plate 13 and the vibration part 11a on the front housing 11 can be sufficiently ensured. The oscillator main body 21 is attached to the stepped groove 13a, and parallelism between the oscillator main body 21 and the oscillator piece 22 and the oscillating portion 11a can be ensured.
After the bone conduction structure 20 is installed, glue is coated at the connection position of the bone conduction structure 20 and the front shell 11, namely, glue is coated at the connection position of the vibrator main body 21 and the mounting ring plate 13, the glue can be special LCD sealing glue, and the glue can be matched with a glue injection machine for operation when being coated, so that the glue coating amount needs to be controlled, the glue cannot be too much or too little, and the specific glue coating amount needs to be determined according to the specific model of the earphone.
The wiring is used for connecting or welding the connecting wire on the vibrator main body 21 with the connecting wire on the earphone ear hook, so that the conduction between the bone conduction earphone and the transmission line is ensured, and the smooth use of the bone conduction earphone is ensured.
Before the rear shell 12 is installed, a circle of glue is required to be coated at the installation step position of the rear shell 12, and then the rear shell 12 is installed on the front shell 11, so that the rear shell 12 is clamped with the front shell 11, and the assembly of the bone conduction headset is completed.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (10)
1. A bone conduction headset, comprising:
a housing (10) having a front housing (11) and a rear housing (12), the front housing (11) and the rear housing (12) being connected to form an installation cavity, a vibration portion (11 a) for adhering to the skin being formed on the surface of the front housing (11);
A bone conduction structure (20) which is arranged in the installation cavity and is provided with a vibrator main body (21) and a vibrator vibrating plate (22), wherein the vibrator vibrating plate (22) and the vibrating part (11 a) are arranged at intervals to form a vibrating cavity (14), and the vibrating cavity (14) is used for transmitting the vibrating acting force of the vibrator vibrating plate (22) to the vibrating part (11 a);
The cavity formed by enclosing the front shell (11) is a vibrating front cavity, the cavity formed by enclosing the rear shell (12) is a vibrating rear cavity, and the cavity volume of the vibrating front cavity is smaller than that of the vibrating rear cavity; the vibrator vibrating plate (22) comprises a cylindrical portion and a disc portion, the cylindrical portion is fixedly connected with the vibrator main body (21), the disc portion is fixedly connected with the vibrator main body (21) through the cylindrical portion, and the diameter of the disc portion is larger than that of the cylindrical portion.
2. The bone conduction headset according to claim 1, wherein a plane along a thickness direction of the housing (10) is a cross section, and a cross-sectional area of the front housing (11) is smaller than a cross-sectional area of the rear housing (12) such that an effective vibration area of the front housing (11) is smaller than an effective vibration area of the rear housing (12).
3. Bone conduction headset according to claim 2, characterized in that the ratio of the effective vibration area of the front housing (11) to the effective vibration area of the rear housing (12) is 1:2-4.
4. A bone conduction headset according to claim 3, wherein the ratio of the cavity volume of the pre-vibration cavity to the cavity volume of the post-vibration cavity is 1:2-4.
5. The bone conduction headset of claim 1, wherein a mounting ring plate (13) is disposed in the front housing (11), a step groove (13 a) is formed in an inner wall of the mounting ring plate (13), and the vibrator main body (21) is engaged with the step groove (13 a) to block a conduction space between the vibrator vibrating plate (22) and the rear housing (12).
6. The bone conduction headset of claim 5, wherein the stepped groove (13 a) is parallel to the vibrating portion (11 a) to make the vibrator vibrating piece (22) parallel to the vibrating portion (11 a).
7. The bone conduction headset of claim 6, wherein a locking protrusion (30) is provided on the front case (11), a locking groove (40) is provided on the rear case (12), and the locking protrusion (30) is locked with the locking groove (40) to lock the front case (11) with the rear case (12).
8. The bone conduction headset of claim 7, wherein a limit post (15) is disposed in the front housing (11), a limit collar (16) is disposed in the rear housing (12), and the limit post (15) is in plug-in fit with the limit collar (16).
9. A method of manufacturing a bone conduction headset according to any one of claims 1-8, comprising the steps of:
-installing a bone conduction structure (20), installing the bone conduction structure (20) into the front housing (11);
Dispensing, namely coating glue on the connection position of the bone conduction structure (20) and the front shell (11);
and a rear housing (12) is mounted, and the rear housing (12) is mounted on the front housing (11) so that the rear housing (12) is clamped with the front housing (11).
10. The method of manufacturing a bone conduction headset according to claim 9, characterized in that the front housing (11) is opened with its side facing upwards during the step of mounting the bone conduction structure (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211030684.0A CN115209303B (en) | 2022-08-26 | 2022-08-26 | Bone conduction earphone and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211030684.0A CN115209303B (en) | 2022-08-26 | 2022-08-26 | Bone conduction earphone and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115209303A CN115209303A (en) | 2022-10-18 |
| CN115209303B true CN115209303B (en) | 2024-05-17 |
Family
ID=83571794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211030684.0A Active CN115209303B (en) | 2022-08-26 | 2022-08-26 | Bone conduction earphone and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115209303B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116112844B (en) * | 2022-12-30 | 2024-01-19 | 深圳市吸铁石科技有限公司 | Detachable bone conduction hearing-aid earphone capable of reducing noise and mounting method |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103716739A (en) * | 2014-01-06 | 2014-04-09 | 深圳市韶音科技有限公司 | Method for suppressing sound leakage of bone conduction loudspeaker and bone conduction loudspeaker |
| CN105163218A (en) * | 2015-09-09 | 2015-12-16 | 东莞泉声电子有限公司 | High-clarity bone conduction earphone capable of reducing vibration energy attenuation |
| CN105578362A (en) * | 2016-03-16 | 2016-05-11 | 珠海格力电器股份有限公司 | Loudspeaker assembly and electronic equipment |
| CN105874817A (en) * | 2013-09-02 | 2016-08-17 | 哈曼国际工业有限公司 | Earphone |
| CN209299470U (en) * | 2018-12-27 | 2019-08-23 | 东莞市龙拓鑫电子有限公司 | A kind of earphone |
| CN110611853A (en) * | 2018-06-15 | 2019-12-24 | 深圳市韶音科技有限公司 | Bone conduction loudspeaker |
| CN112073849A (en) * | 2020-08-27 | 2020-12-11 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker box |
| CN112653964A (en) * | 2018-04-26 | 2021-04-13 | 深圳市韶音科技有限公司 | Earphone system |
| CN113556655A (en) * | 2021-07-07 | 2021-10-26 | 歌尔股份有限公司 | Intelligent head-mounted equipment |
| CN214707999U (en) * | 2021-04-09 | 2021-11-12 | 深圳市韶音科技有限公司 | Earphone set |
| CN114205709A (en) * | 2021-12-20 | 2022-03-18 | 深圳市开宝声学科技有限公司 | Bone conduction earphone capable of preventing sound leakage |
| CN114286220A (en) * | 2020-07-29 | 2022-04-05 | 深圳市韶音科技有限公司 | Earphone set |
| CN216291424U (en) * | 2021-10-09 | 2022-04-12 | 美特科技(苏州)有限公司 | Miniature loudspeaker |
| CN216391367U (en) * | 2021-10-18 | 2022-04-26 | 深圳朗凡创新科技有限公司 | Osteoacusis sound generating mechanism and osteoacusis earphone |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6668138B2 (en) * | 2016-03-29 | 2020-03-18 | 株式会社オーディオテクニカ | earphone |
| US11223895B2 (en) * | 2020-03-24 | 2022-01-11 | Bose Corporation | Wearable audio device with counter-bore port feature |
-
2022
- 2022-08-26 CN CN202211030684.0A patent/CN115209303B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105874817A (en) * | 2013-09-02 | 2016-08-17 | 哈曼国际工业有限公司 | Earphone |
| CN103716739A (en) * | 2014-01-06 | 2014-04-09 | 深圳市韶音科技有限公司 | Method for suppressing sound leakage of bone conduction loudspeaker and bone conduction loudspeaker |
| CN105163218A (en) * | 2015-09-09 | 2015-12-16 | 东莞泉声电子有限公司 | High-clarity bone conduction earphone capable of reducing vibration energy attenuation |
| CN105578362A (en) * | 2016-03-16 | 2016-05-11 | 珠海格力电器股份有限公司 | Loudspeaker assembly and electronic equipment |
| CN112653964A (en) * | 2018-04-26 | 2021-04-13 | 深圳市韶音科技有限公司 | Earphone system |
| CN110611853A (en) * | 2018-06-15 | 2019-12-24 | 深圳市韶音科技有限公司 | Bone conduction loudspeaker |
| CN209299470U (en) * | 2018-12-27 | 2019-08-23 | 东莞市龙拓鑫电子有限公司 | A kind of earphone |
| CN114286220A (en) * | 2020-07-29 | 2022-04-05 | 深圳市韶音科技有限公司 | Earphone set |
| CN112073849A (en) * | 2020-08-27 | 2020-12-11 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker box |
| CN214707999U (en) * | 2021-04-09 | 2021-11-12 | 深圳市韶音科技有限公司 | Earphone set |
| CN113556655A (en) * | 2021-07-07 | 2021-10-26 | 歌尔股份有限公司 | Intelligent head-mounted equipment |
| CN216291424U (en) * | 2021-10-09 | 2022-04-12 | 美特科技(苏州)有限公司 | Miniature loudspeaker |
| CN216391367U (en) * | 2021-10-18 | 2022-04-26 | 深圳朗凡创新科技有限公司 | Osteoacusis sound generating mechanism and osteoacusis earphone |
| CN114205709A (en) * | 2021-12-20 | 2022-03-18 | 深圳市开宝声学科技有限公司 | Bone conduction earphone capable of preventing sound leakage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115209303A (en) | 2022-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11592690B2 (en) | Loudspeaker device | |
| CN109511043B (en) | Bone conduction loudspeaker and bone conduction sounding device | |
| US4109116A (en) | Hearing aid receiver with plural transducers | |
| TW202306395A (en) | Acoustic output device | |
| WO2021063113A1 (en) | Bone conduction loudspeaker, bone conduction earphone, and bone conduction hearing aid | |
| EP3648472B1 (en) | Thin receiver | |
| CN115209303B (en) | Bone conduction earphone and manufacturing method thereof | |
| KR100556967B1 (en) | Waterproof bone vibrating speaker | |
| CN210694342U (en) | Full-frequency bone conduction loudspeaker | |
| CN219499492U (en) | Transducer fixing device with vibration supporting arm | |
| CN110475185B (en) | Acoustic radiation assembly and sound production device | |
| CN210431856U (en) | Reverse miniature loudspeaker | |
| JP2002315098A (en) | Electroacoustic transducer | |
| KR200482649Y1 (en) | Electro-acoustic transducer of structure for acoustic vibration distortion prevention | |
| CN114223213A (en) | Speaker unit and speaker bending diaphragm | |
| CN219644267U (en) | Vibrator mounting box capable of reducing noise and bone conduction earphone | |
| KR102645927B1 (en) | Leakage sound reduction device and sound output device | |
| CN219437134U (en) | Fixing device and bone conduction earphone of integral type transducer | |
| CN216795239U (en) | Open bone acoustic conduction speaker and earphone | |
| CN221043170U (en) | Semi-open earphone | |
| CN216357289U (en) | Full-frequency bone sound conduction speaker and earphone | |
| CN218850959U (en) | Miniature speaker module | |
| CN216795238U (en) | Waterproof bone sound conduction speaker and earphone | |
| CN220273831U (en) | Closed sound cavity structure for reducing leakage sound of bone conduction earphone and earphone | |
| KR200338060Y1 (en) | structure of a multi function for piezo ceramic diaphragm which is combined voice coil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |