CN115209303A - Bone conduction earphone and manufacturing method thereof - Google Patents
Bone conduction earphone and manufacturing method thereof Download PDFInfo
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- CN115209303A CN115209303A CN202211030684.0A CN202211030684A CN115209303A CN 115209303 A CN115209303 A CN 115209303A CN 202211030684 A CN202211030684 A CN 202211030684A CN 115209303 A CN115209303 A CN 115209303A
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 81
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000009434 installation Methods 0.000 claims abstract description 11
- 239000003292 glue Substances 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 108090000565 Capsid Proteins Proteins 0.000 abstract description 27
- 230000000694 effects Effects 0.000 abstract description 10
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000010030 laminating Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000035807 sensation Effects 0.000 description 6
- 230000005855 radiation Effects 0.000 description 5
- 210000000860 cochlear nerve Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008447 perception Effects 0.000 description 4
- 210000003625 skull Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000000845 cartilage Anatomy 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 210000000613 ear canal Anatomy 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 210000003027 ear inner Anatomy 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process 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
- 239000000243 solution Substances 0.000 description 1
- 210000003582 temporal bone Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- H04R1/105—Earpiece supports, e.g. ear hooks
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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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- 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 bone conduction earphone and manufacturing method thereof, this bone conduction earphone includes the casing and installs the bone conduction structure in the casing, the casing has procapsid and back casing, the procapsid is connected with back casing and forms the installation inner chamber, the surface of procapsid is formed with the vibration portion that is used for laminating mutually with the skin, bone conduction structure has oscillator main part and oscillator vibrating plate, oscillator vibrating plate and vibration portion interval set up and be used for forming the vibration chamber, the vibration chamber conducts the vibration effort of oscillator vibrating plate to vibration portion, the procapsid encloses the cavity that closes formation for the vibration antetheca, the cavity that back casing encloses and closes formation is the vibration back chamber, the cavity volume of vibration antetheca is less than the cavity volume of vibration back chamber, this bone conduction earphone is under the sound conduction effect in vibration chamber, the vibration effort of oscillator vibrating plate can more complete conduction for vibration portion, the sound conduction effect is better, because the volume ratio of procapsid and back casing cavity, earphone is less, privacy nature is stronger.
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 vibration device is a transducer for converting electric oscillation into mechanical vibration, the basic principle of the bone vibration device is a moving magnet type, the bone vibration device is generally composed of a shell, a magnet, a U iron, a voice coil, a positioning elastic sheet, a vibrator vibrating sheet, a PCB (printed circuit board) adapter plate and the like, wherein the U iron is bonded with the magnet to form a magnetic circuit structure, the outer edge of the positioning elastic sheet is arranged in the shell, the inner edge of the positioning elastic sheet is connected with the outer edge of the vibrator vibrating sheet, the bottom of the vibrator vibrating sheet is connected with the U-shaped iron, a complete suspension system is formed, and the weight of the magnetic circuit structure and the vibrator vibrating sheet is the vibration mass of the suspension system.
Generally, a bone conduction earphone uses a bone resonator unit as a sound generating unit of the earphone, and the bone resonator unit is installed in an earphone housing and connected to the earphone housing to transmit energy, like other electrodynamic speaker units.
The output of the energy of the bone vibration device is transmitted to the whole earphone shell through the connection of the vibration piece of the part vibration device and the shell wall of the earphone (or the connection of elastic silica gel arranged on the earphone shell), and the earphone shell conducts amplified sound to the inner ear to stimulate auditory nerve to perceive the sound in a mechanical vibration mode through the contact with the skull.
The vibration force is connected with the skull to sense the sound, which is the bone conduction transmission; in addition, the vibration force is connected with the cavity (box body) to generate resonance, the cavity radiates sound waves, the sound waves are transmitted through air and heard by other people, privacy is not high, and air conduction transmission sound leakage is large.
In the related art, when the component oscillator piece is connected (bonded or buckled, etc.) with the earphone shell, the top of the oscillator piece is supported and connected with the earphone shell, and the suspension system is constrained by the connection force of the earphone shell. During resonance, the reverse pre-pressure of the earphone shell is increased, the force resistance is increased, the vibration mass is increased, and the bone vibration oscillator has small amplitude (displacement), large energy transmission loss, small vibration sense and poor tone quality.
Moreover, bone conduction earphone passes through the vibration perception sound of skull, and skull and the ear canal speech signal transmission channel medium differ greatly, and bone conduction pronunciation have the inherent shortcomings such as low frequency composition thickness, high frequency composition decay is serious, sound is dull and stereotyped than air conduction pronunciation, is unfavorable for the performance of sound, needs further optimization.
Disclosure of Invention
In order to solve the above technical problem, the present application provides a bone conduction headset and a method of manufacturing the same.
In a first aspect, the present application provides a bone conduction headset, which adopts the following technical scheme:
a bone conduction headset, comprising:
a housing having a front housing and a rear housing, the front housing being connected to the rear housing to form a mounting 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 mounting inner cavity and 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, and the vibrating cavity conducts the vibrating acting force of the vibrator vibrating piece to the vibrating part;
the front shell body is enclosed to form a cavity which is a vibration front cavity, the rear shell body is enclosed to form a cavity which is a vibration rear cavity, and the volume of the cavity of the vibration front cavity is smaller than that of the cavity of the vibration rear cavity.
Based on the technical scheme, when the earphone runs, the vibrator main body in the bone conduction structure serves as a driving source to drive the vibrator vibrating piece to vibrate, when the vibrator vibrating piece vibrates, air in the vibration cavity generates vibration waves, the vibration waves are transmitted to the vibration part, and the vibration part transmits sound to an auditory system of a human body. Because the preceding casing encloses the volume that closes the vibration front cavity volume that forms and is less than the volume that the vibration back cavity that closes the formation of back casing, front cavity air volume is less than back cavity air volume, and front cavity aeroelasticity is higher than the back cavity, and the transmission of preceding chamber power is in the back cavity, and power is weakened by the back cavity, and the sound wave that front cavity resonance produced is weakened by the back cavity, and the sound intensity weakens, reduces the problem that traditional bone conduction earphone leaked sound. Therefore, the vibration acting force of the vibrator vibrating piece can be transmitted to the vibrating part through the more complete front cavity, the sound transmission effect is better, the volume ratio of the front shell to the rear shell cavity is less, the sound leakage of the earphone is less, and the privacy is stronger.
Preferably, the surface along the thickness direction of the shell is a cross section, and the cross sectional area of the front shell is smaller than that of the rear shell, so that the effective vibration area of the front shell is smaller than that of the rear shell.
Based on above-mentioned technical scheme, oscillator shakes piece vibration effort in the procapsid, back casing is connected with the procapsid, the power transmission is in procapsid output vibration power radiation forward sound wave, the procapsid is connected with the back casing, procapsid transmission power is in the back casing, produce the inertia power and radiate backward sound wave, the vibration power that the procapsid produced is opposite with the inertia power opposite direction that the back casing produced, meet mutual offset when the sound wave, the sound intensity weakens, the sound leakage reduces, utilize the effective vibration area of procapsid to be less than back casing vibration area, can be so that be of value to when vibration power output, reduce the sound leakage.
Preferably, the ratio of the effective vibration area of the front shell to the effective vibration area of the rear shell is 1: 2-4.
Preferably, the ratio of the cavity volume of the front vibration cavity to the cavity volume of the rear vibration 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 oscillator main body is clamped with the step groove to block a conduction space between the oscillator piece and the rear shell.
Based on above-mentioned technical scheme, the oscillator main part is connected with the installation crown plate on the procapsid, consequently the vibration chamber is formed by the inner wall combination of oscillator main part and installation crown plate, makes the oscillator piece be located the vibration intracavity, and the vibration of oscillator piece is diffused to vibration portion and procapsid on by the vibration chamber, and the oscillator main part separation has the oscillator piece and has shaken the conduction space between the casing after with, consequently the transmission fidelity more of sound, and sound transmission effect is better, and low frequency and high frequency transmission effect are also better.
Preferably, the stepped groove is parallel to the vibrating portion so that the vibrator blade is parallel to the vibrating portion.
Based on above-mentioned technical scheme, the step groove sets up with the vibrating portion is parallel, therefore the oscillator main part is installed and can be guaranteed the oscillator piece and the depth of parallelism of vibrating portion on the step groove, and when the oscillator piece vibrated, the oscillator piece vibrated the vibration frequency can be better transmit to the vibrating portion on, and the more balanced conduction of vibrational force is to every position of vibrating portion, and the effect of bone conduction is better.
Preferably, the mounting ring plate is provided with a clamping protrusion, the rear shell is provided with a clamping groove, and the clamping protrusion is clamped with the clamping groove so that the front shell is clamped with the rear shell.
Based on above-mentioned technical scheme, the cooperation of block protruding can with the block groove looks joint on the back casing of the block on the installation crown plate, makes procapsid and back casing looks joint, consequently can guarantee procapsid and back casing looks joint, simple easy installation when assembling procapsid and back casing simultaneously.
Preferably, a limiting column is arranged in the front shell, a limiting sleeve ring is arranged in the rear shell, and the limiting column is in plug-in fit with the limiting sleeve ring.
Based on above-mentioned technical scheme, when casing and back casing looks joint cooperation in the front, spacing post and the mutual joint cooperation of spacing lantern ring can play the guide effect promptly when assembling earphone procapsid and back casing, and the procapsid is difficult to take place the dislocation with the assembly of back casing, 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 earphone, which adopts the following technical solution:
a manufacturing method of a bone conduction headset comprises the following steps:
installing a bone guide structure into the front housing;
dispensing glue, namely coating glue at the connecting position of the bone conduction structure and the front shell;
and mounting a rear shell, mounting the rear shell on the front shell, and clamping the rear shell and the front shell.
Preferably, the bone conduction structure mounting step is performed such that the opening side of the front housing faces upward.
Based on above-mentioned technical scheme, bone conduction headset structure is comparatively simple in this application, and the assembling process is also simpler, reduces the assembly degree of difficulty, and is lower to the assembly precision requirement of each part of earphone, therefore the yield of earphone is higher.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the procapsid encloses the volume that closes the vibration front cavity volume that forms and is less than the volume that closes the vibration back cavity that forms of back casing, and front cavity air volume is less than back cavity air volume, and front cavity air elasticity is higher than the back cavity, and current chamber power transmits in the back cavity, and power is weakened by the back cavity, and the sound wave that front cavity resonance produced is weakened by the back cavity, and the sound intensity weakens, reduces the problem that traditional bone conduction earphone leaked sound. Therefore, the vibration acting force of the vibrator vibrating piece can be more completely transmitted to the vibrating 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 cavity to the rear cavity;
2. the vibrator vibrating plate 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 front shell transmits force to the rear shell to generate inertia force to radiate backward sound waves, the direction of the vibrating force generated by the front shell is opposite to that of the inertia force generated by the rear shell, when the sound waves meet and are mutually offset, the sound intensity is weakened, the sound leakage is reduced, and the effective vibrating area of the front shell is smaller than that of the rear shell, so that the vibrating force can be favorably output, and the sound leakage is reduced;
3. the structure of this application bone conduction earphone is comparatively simple, and the step is comparatively simple when the assembly earphone, and is lower to the assembly required precision of earphone, consequently can guarantee the assembly yield of earphone.
Drawings
Fig. 1 is a schematic diagram illustrating an overall structure of a bone conduction headset;
fig. 2 is a schematic diagram illustrating an exploded structure of a bone conduction headset;
FIG. 3 is a schematic diagram of the structure of FIG. 2 from different angles;
fig. 4 shows a structural front view of a bone conduction headset;
FIG. 5 isbase:Sub>A sectional view of the structure taken along line A-A in FIG. 4;
fig. 6 is a graph showing frequency response curves of different effective vibration area ratios of the front shell and the rear shell in the bone conduction headset according to the embodiment.
Description of reference numerals:
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, a step groove; 13b, a guide ring groove; 14. a vibration chamber; 15. a limiting column; 16. a limiting lantern ring; 20. a bone conduction structure; 21. a vibrator main body; 22. a vibrator vibrating sheet; 30. clamping the protrusion; 40. a clamping groove.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application discloses a bone conduction headset.
Referring to fig. 1, the bone conduction earphone includes a housing 10, the housing 10 is a bone conduction earphone housing 10, the housing 10 includes a front housing 11 and a rear housing 12 which are snap-fitted to each other, a vibration portion 11a is formed on a surface of the front housing 11, the vibration portion 11a contacts with a temporal bone and a jaw bone in front of an external auditory canal, and a sound is conducted to an auditory nerve of a user by using a bone conduction method.
Referring to fig. 2, a mounting cavity is formed by connecting the front housing 11 and the rear housing 12, a bone conduction structure 20 is mounted in the mounting cavity, the bone conduction structure 20 includes a vibrator body 21 and a vibrator element 22, and the vibrator body 21 provides a driving force for the vibrator element 22 to vibrate the vibrator element 22.
Referring to fig. 3, a mounting ring plate 13 is integrally formed in the front case 11, a stepped groove 13a is formed in an 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 element 22 is spaced apart from the vibration part 11a, that is, the vibrator element 22 is spaced apart from the vibration part 11a by a predetermined distance, and the vibrator element 22 and the vibration part 11a are arranged to form a vibration cavity 14 therebetween, so that the vibrator element 22 transmits a vibration force to the vibration part 11a through the vibration cavity 14 during a vibration process, and the vibration force is transmitted to an auditory nerve of a human body through the vibration part 11 a.
The vibrator element 22 vibrates in the vibration cavity 14, so that the vibration of the vibrator element 22 is not restricted by the case 10, and the case 10 is not directly attached to the vibrator element due to the structure, so that the vibration of the vibrator element is not restricted by the structure of the case 10, and more preferably, an electric frequency signal is restored. The vibrating reed drives the shell 10 to vibrate by feedback force to form a vibration transfer sound source of the traditional vibrator, and meanwhile, the vibrating part 11a vibrates to drive air in the vibrating cavity 14 to vibrate to form sound similar to an air conduction horn, so that the tone quality is better, and the defects of bone conduction low frequency and high frequency are overcome.
Meanwhile, the vibration acting force of the vibrator vibrating piece 22 acts on the front shell 11, the vibration acting 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 inertia force to radiate backward sound waves, the vibration force generated by the front shell 11 is opposite to the inertia force generated by the rear shell 12 in direction, and when the sound waves meet and are mutually offset, the sound intensity is weakened, and the sound leakage is reduced.
Referring to fig. 2 and 3, a locking protrusion 30 is integrally formed on the front case 11, a locking groove 40 is formed on the rear case 12, the locking protrusion 30 is matched with the locking groove 40 in shape and size, and the locking protrusion 30 is locked with the locking groove 40 to lock the front case 11 with the rear case 12. At least two sets of engaging protrusions 30 are disposed corresponding to the engaging grooves 40, and in this embodiment, three sets of engaging protrusions 30 are disposed at intervals from the engaging grooves 40 to ensure the tightness of the engaging between the front case 11 and the rear case 12.
Referring to fig. 3, one end of the mounting ring plate 13 is open, the vibrator body 21 is assembled at one end of the mounting ring plate 13 close to the opening, a guide ring groove 13b is further formed in one side of the mounting ring plate 13 close to the open end, and a guide inclined plane is formed in one side of the guide ring groove 13b, so that the vibrator body 21 is assembled more conveniently and quickly.
The mounting ring plate 13 and the front case 11 are integrally injection-molded, so that the parallelism between the step groove 13a and the vibrating portion 11a can be ensured relatively accurately in the injection molding process, and when the vibrator body 21 and the step groove 13a are assembled, the parallelism between the vibrator vibrating piece 22 and the vibrating portion 11a can be ensured. Therefore, the same vibration frequency as that of the vibrating portion 11a can be maintained in the vibrator main body 21 during vibration, and the vibration waveform is substantially the same, so that the sound guide effect of the vibrator element 22 is more excellent.
Referring to fig. 3, a limit post 15 is integrally formed in the front housing 11, a limit collar 16 is integrally formed in the rear housing 12, the limit post 15 and the limit collar 16 are in plug-in fit, when the front housing 11 is clamped with the rear housing 12, the limit post 15 and the limit collar 16 can limit and fix the front housing 11 and the rear housing 12, and the tightness of connection between the front housing 11 and the rear housing 12 can be ensured.
Further, the cavity that the procapsid 11 encloses to close and forms is vibration front cavity, and the cavity that back casing 12 encloses to close and forms is vibration rear cavity, and the cavity volume of vibration front cavity is less than the cavity volume of vibration rear cavity. Specifically, the ratio of the cavity volume of the front vibration cavity to the cavity volume of the rear vibration cavity is 1: 2-4.
The sectional area of the front case 11 is smaller than that of the rear case 12 with the center line of the earphone in the entire width direction as a section, so that the effective vibration area in the front case 11 is smaller than that 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 four different frequency response curves of the bone conduction earphone under the state of effective vibration area ratio of the front shell to the back shell, and it can be known through analysis of the frequency response curves of the bone conduction earphone in fig. 6:
specifically, when the ratio of the effective vibration area of the front case 11 to the effective vibration area of the rear case 12 is 1. The flattest frequency response curve is obtained at the middle frequency range of 600HZ-1.2KHZ, the relative distortion degree is smaller, the flattest frequency response curve is obtained at the middle frequency range of 2KHZ-3.5KHZ, and peaks and valleys with fluctuation do not exist, which shows 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 and is equal to the sound pressure level of the force generated by the resonance of the box body near 70HZ, and the high, middle and low frequency components are sufficient. Through subjective auditory sensation, bone conduction vibration output power is enough, and the low frequency response is light and fast, and intermediate frequency perception sound is clear plump, and the distortion is little, and the signal to noise ratio is high, and the sound listening sensation is less outward to the sound wave of box resonance radiation, and the sound leakage is little, and the 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.
Obtain more flat frequency response curve at well high-frequency range 2KHZ-3.5KHZ, but the sound pressure level is about 93dB, relative first curve 01 in figure 6 for preceding shell/backshell effective vibration area ratio = 14, the sound pressure level of obtaining is slightly littleer, the intermediate frequency composition is weaker, through subjective auditory sensation, bone conduction vibration output power is enough, the light and fast dynamics of low frequency reaction is sufficient, well low frequency perception sound is comparatively thick and heavy, the intermediate frequency is darker bright inadequately, the sound wave external sound auditory sensation of box resonance radiation is slightly big, the sound leakage is slightly big, 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. Through subjective auditory sensation, bone conduction vibration output force is sufficient, low-frequency reaction force is weak, medium and low frequency perception sound is thick and heavy, medium frequency is dark, sound wave external sound auditory sensation of box body resonance radiation is large, sound leakage is large, and privacy is general.
In order to fully compare the different front shell/rear shell effective vibration area ratios in the above embodiments, the fourth curve 04 in fig. 6 represents that the front shell/rear shell effective vibration area ratio is 2.
It can be known from the above analysis that, along with the increase of the effective vibration area ratio of the front shell/the rear shell, the forward wave generated by the vibration of the front shell 11 of the bone conduction earphone and the backward wave generated by the rear shell 12 cancel each other out and gradually weaken, the sound leakage gradually increases, the privacy deteriorates, and the bone conduction and sound conduction performance gradually deteriorates. Therefore, the priority is given to the front case/rear case effective vibration area ratio of 1 > 4 > 1.
The implementation principle of the bone conduction earphone provided by the embodiment is as follows: when in use, the bone conduction earphone is worn at the position of the cartilage near the auditory canal of the human body and is tightly attached to the cartilage. When the bone conduction earphone is started, the vibrator main body 21 drives the vibrator vibrating piece 22 to vibrate, and when the vibrator vibrating piece 22 vibrates, the vibration cavity 14 transmits vibration waves to the vibrating part 11a to enable the vibrating part 11a to vibrate synchronously, so that sound can be conducted to the auditory nerve of a human body.
The vibrator element 22 vibrates in the vibration cavity 14, so that the vibration of the vibrator element 22 is not restricted by the case 10, and the case 10 is not directly attached to the vibrator element due to the structure, so that the vibration of the vibrator element is not restricted by the structure of the case 10, and more preferably, an electric frequency signal is restored. The vibrating reed feedback force drives the shell 10 to vibrate to form a vibration transmission sound source of the traditional vibrator, and meanwhile the vibrating part 11a vibrates to drive the air in the vibrating cavity 14 to vibrate to form similar air conduction horn sounding, so that the tone quality is better, and the defects of bone conduction low frequency and high frequency are overcome.
And since the effective vibration area of the front case 11 is smaller than that of the rear case 12, the effective vibration area of the front case is smaller than that of the rear case, which is beneficial to the output of the vibration force and reduces the sound leakage.
The embodiment of the application also discloses a manufacturing method of the bone conduction headset. The manufacturing method of the bone conduction earphone comprises the following steps:
installing bone conduction structure 20, making procapsid 11 open-ended one end towards the top, in installing the installation crown plate 13 in the procapsid 11 bone conduction structure 20, it is required to explain that procapsid 11 sets up with installation crown plate 13 integrated into one piece, can utilize the form shaping procapsid 11 and installation crown plate 13 of moulding plastics, and the benefit of utilizing this kind of production methods lies in, only need guarantee the precision of mould, alright with the precision of abundant assurance procapsid 11. The step groove 13a and the guide ring groove 13b of the mounting ring plate 13 are also integrally formed by injection molding, so that the parallelism between the step groove 13a of the mounting ring plate 13 and the vibrating part 11a of the front housing 11 can be sufficiently ensured. The vibrator body 21 is attached to the stepped groove 13a, and the parallelism of the vibrator body 21 and the vibrator element 22 with the vibrating portion 11a can be ensured.
Dispensing, after the bone conduction structure 20 is installed, glue is coated at the connecting position of the bone conduction structure 20 and the front shell 11, namely, glue is coated at the connecting position of the vibrator main body 21 and the installation ring plate 13, the glue can adopt special LCD sealing glue, attention needs to be paid to, the glue can be matched with a glue injection machine for operation when being coated, 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.
And the connection wire is used for connecting or welding the connection wire on the vibrator main body 21 with the connection wire on the earphone ear hook, so that the conduction of the bone conduction earphone and the transmission wire is ensured, and the smooth use of the bone conduction earphone is ensured.
After the rear shell 12 is installed, before the rear shell 12 is installed, a circle of glue needs to be coated at the position of an installation step 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 are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A bone conduction headset, comprising:
a housing (10) having a front housing (11) and a rear housing (12), wherein the front housing (11) and the rear housing (12) are connected to form a mounting cavity, and a vibrating portion (11 a) for adhering to the skin is formed on the surface of the front housing (11);
the bone conduction structure (20) is installed in the installation inner cavity and is provided with a vibrator main body (21) and a vibrator vibrating piece (22), the vibrator vibrating piece (22) and the vibrating part (11 a) are arranged at intervals to form a vibrating cavity (14), and the vibrating cavity (14) conducts the vibrating acting force of the vibrator vibrating piece (22) to the vibrating part (11 a);
the cavity that front casing (11) enclose to close and form is the vibration front cavity, the cavity that back casing (12) enclose to close and form is the vibration back cavity, the cavity volume of vibration front cavity is less than the cavity volume of vibration back cavity.
2. The bone conduction headset of 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) so 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. The bone conduction earphone according to claim 3, wherein the cavity volume ratio of the front vibration cavity to the back vibration cavity is 1: 2-4.
5. The bone conduction headset according to 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 body (21) is engaged with the step groove (13 a) to block a conduction space between the vibrator vibrating piece (22) and the rear housing (12).
6. The bone conduction headset according to claim 5, wherein the stepped groove (13 a) is parallel to the vibrating portion (11 a) so that the vibrator blade (22) is parallel to the vibrating portion (11 a).
7. The bone conduction headset of claim 6, wherein the front housing (11) is provided with a snap projection (30), the rear housing (12) is provided with a snap groove (40), and the snap projection (30) is snapped into the snap groove (40) to snap the front housing (11) into the rear housing (12).
8. The bone conduction headset of claim 7, wherein a retaining post (15) is provided in the front housing (11), a retaining collar (16) is provided in the rear housing (12), and the retaining post (15) is in plug-fit with the retaining collar (16).
9. A method of manufacturing a bone conduction headset according to any one of claims 1-8, comprising the steps of:
mounting a bone conduction structure (20), mounting the bone conduction structure (20) into the front housing (11);
dispensing glue, namely coating glue at the connecting position of the bone conduction structure (20) and the front shell (11);
and a rear shell (12) is installed, and the rear shell (12) is installed on the front shell (11) so that the rear shell (12) is clamped with the front shell (11).
10. The manufacturing method of the bone conduction headset as claimed in claim 9, wherein the opening side of the front housing (11) is directed upward at the step of mounting the bone conduction structure (20).
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