CN111163394A - Bone conduction acoustic device - Google Patents
Bone conduction acoustic device Download PDFInfo
- Publication number
- CN111163394A CN111163394A CN201911390872.2A CN201911390872A CN111163394A CN 111163394 A CN111163394 A CN 111163394A CN 201911390872 A CN201911390872 A CN 201911390872A CN 111163394 A CN111163394 A CN 111163394A
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- bone conduction
- vibration
- acoustic
- soft
- shell
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 87
- 230000002093 peripheral effect Effects 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000005236 sound signal Effects 0.000 abstract description 7
- 230000006872 improvement Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Classifications
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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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
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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
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/65—Housing parts, e.g. shells, tips or moulds, or their manufacture
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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
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Manufacturing & Machinery (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
The invention belongs to the technical field of electroacoustic products, and particularly relates to a bone conduction acoustic device which comprises a shell, a bone conduction vibrator and a vibration transmission piece connected between a vibration output part and a soft vibration part of the bone conduction vibrator, wherein a radial support structure is arranged between a cavity part of the bone conduction vibrator, which is far away from the soft vibration part, and the bone conduction vibrator, a plurality of front sound leakage holes are arranged on the side wall part of the shell, which is far away from the soft vibration part, at intervals, and a plurality of rear sound leakage holes are arranged on the side wall part of the shell, which is far away from the soft vibration part, at intervals along the circumferential direction. The radial support structure can form radial limitation, so that radial deflection generated when the bone conduction vibrator vibrates is avoided, and the acoustic performance can be improved; sound signals are respectively transmitted from the front sound leakage holes and the rear sound leakage holes, and sound pressure counteraction is generated at the peripheral side of the shell, so that sound leakage can be reduced; the problem of current bone conduction acoustics device's sound reveal greatly and acoustic performance is poor is solved.
Description
Technical Field
The invention belongs to the technical field of electroacoustic products, and particularly relates to a bone conduction acoustic device.
Background
Bone conduction is a sound conduction mode, namely, sound is converted into mechanical vibration with different frequencies to transmit sound waves, and clear sound restoration can be realized in a noisy environment. At present, bone conduction earphones, hearing aids and the like are bone conduction acoustic devices which transmit sound waves by using bone conduction, and are increasingly appearing in daily life.
The existing bone conduction acoustic devices mainly have the following problems: when the user normally calls or plays music, the sound leakage is large, so that the user is easy to interfere by people beside the user, and the secret is easy to leak; when the bone conduction acoustic device is worn, the bone conduction vibrator of the bone conduction acoustic device is axially deviated due to the action of gravity, so that the actual acoustic performance of the bone conduction acoustic device is deviated from the debugged acoustic performance, and the acoustic performance of the bone conduction acoustic device is poor.
Disclosure of Invention
The invention aims to provide a bone conduction acoustic device, aiming at solving the problems of large sound leakage and poor acoustic performance of the traditional bone conduction acoustic device.
The invention discloses a bone conduction acoustic device which comprises a shell and a bone conduction vibrator arranged in a cavity defined by the shell, wherein a soft vibration part is arranged on one side of the shell, a vibration transmission piece is connected between a vibration output part of the bone conduction vibrator and the soft vibration part, a radial supporting structure is arranged between the cavity part of the bone conduction vibrator on one side far away from the soft vibration part and the bone conduction vibrator, a plurality of front sound leakage holes are arranged on the side wall part of the shell on the peripheral side of the soft vibration part at intervals, and a plurality of rear sound leakage holes are arranged on the side wall part of the shell far away from the soft vibration part at intervals along the circumferential direction.
As an improvement, an installation shaft is fixedly connected to one side of the bone conduction vibrator far away from the soft vibration part; the radial supporting structure comprises a support fixedly connected with the shell, a mounting hole is formed in the support corresponding to the mounting shaft, the mounting shaft is inserted into the mounting hole, the radial supporting structure further comprises a plurality of elastic telescopic pieces, the elastic telescopic pieces are arranged between the mounting hole and the mounting shaft and along the plurality of balls arranged at intervals in the circumferential direction of the mounting shaft and correspond to the plurality of balls in the ball positions respectively, and the balls are pressed against the peripheral side face of the mounting shaft respectively.
As an improvement, a radial hole is respectively arranged on the inner side wall of the mounting hole corresponding to each group of the elastic expansion piece and the ball, the elastic expansion piece is arranged in the radial hole, and the ball is arranged at the end part of the radial hole and a part of the ball is exposed out of the radial hole.
As an improvement, an acoustic transparent mesh layer is installed at a cavity portion between the bone conduction vibrator and the soft vibration portion, the acoustic transparent mesh layer divides a cavity surrounded by the housing into a front acoustic cavity and a rear acoustic cavity, the bone conduction vibrator is disposed in the rear acoustic cavity, the vibration transmission member passes through the acoustic transparent mesh layer, the front sound release hole is disposed corresponding to the front acoustic cavity, and the rear sound release hole is disposed corresponding to the rear acoustic cavity.
As an improvement, a vibration elastic arm is further fixedly mounted at a cavity portion between the bone conduction vibrator and the soft vibration portion, and the sound-transmitting mesh layer is fixed to the vibration elastic arm.
As an improvement, the sound-transmitting net layer is made of mesh cloth and is fixedly bonded with the vibrating elastic arm.
As an improvement, the vibration elastic arm comprises an outer ring, an inner ring arranged concentrically with the outer ring, and a plurality of elastic arms connected between the outer ring and the inner ring, and the vibration transmission member passes through the inner ring and is fixedly connected with the inner ring.
As a modification, the outer ring, the plurality of spring arms, and the inner ring are an integral piece formed by injection molding.
As an improvement, the casing includes a box-shaped casing, and an upper cover covering the opening end of the box-shaped casing, the soft vibrating portion is disposed on the upper cover, the plurality of rear sound-leaking holes are disposed on the peripheral side wall of the box-shaped casing, and the bracket is disposed on the bottom side wall of the box-shaped casing.
As an improvement, the bracket is in a plate shape, and the bracket is fixedly connected with the bottom side wall of the box-shaped shell, or the bracket and the bottom side wall of the box-shaped shell are in an integrated structure.
Due to the adoption of the technical scheme, the folding rotating shaft mechanism comprises a bone conduction acoustic device, a bone conduction vibrator and a soft vibration part, wherein the bone conduction vibrator is arranged in a cavity defined by a shell, a soft vibration part is arranged on one side of the shell, a vibration transmission part is connected between a vibration output part and the soft vibration part of the bone conduction vibrator, a radial support structure is arranged between the cavity part of the bone conduction vibrator, which is far away from the soft vibration part, and the bone conduction vibrator, a plurality of front sound leakage holes are arranged on the side wall part of the shell, which is far away from the soft vibration part, at intervals, and a plurality of rear sound leakage holes are arranged on the side wall part of the shell, which is far away from the soft vibration part. When the bone conduction vibrator is worn, the soft vibration part is contacted with a user, the bone conduction vibrator emits a sound signal and generates vibration with corresponding frequency, the vibration is transmitted to the soft vibration part through the vibration transmission piece and then is transmitted to the user through the soft vibration part; because the radial supporting structure is arranged on one side of the bone conduction vibrator, which is far away from the soft vibration part, radial limitation can be formed, radial deflection generated when the bone conduction vibrator vibrates is avoided, and the acoustic performance of the bone conduction acoustic device is improved; because the side wall part of the shell on the peripheral side of the soft vibration part is provided with the plurality of front sound leakage holes at intervals, and the side wall part of the shell far away from the soft vibration part is provided with the plurality of rear sound leakage holes at intervals along the circumferential direction, sound signals are respectively transmitted from the plurality of front sound leakage holes and the plurality of rear sound leakage holes, and sound pressure offset is generated on the peripheral side of the shell, the bone conduction acoustic device can reduce sound leakage.
Drawings
Fig. 1 is a schematic cross-sectional structural view of a bone conduction acoustic device according to an embodiment of the present invention;
fig. 2 is a schematic view of the mounting structure of the vibrating elastic arm and the sound-transmitting mesh layer of the bone conduction acoustic device according to the embodiment of the present invention;
FIG. 3 is a schematic structural view of a vibrating spring arm of a bone conduction acoustic device according to an embodiment of the present invention;
the vibration-proof structure comprises a base shell 11, a bottom shell 12, an upper cover 13, a soft vibration part 14, a front sound-leaking hole 15, a rear sound-leaking hole 21, a bone conduction vibrator 22, a vibration transmission member 23, a mounting shaft 31, a vibration elastic arm 311, an outer ring 312, an inner ring 313, an elastic arm 32, a sound-transmitting net layer 41, a support 42, a ball 43 and an elastic telescopic member.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 to 3 are schematic structural diagrams of a bone conduction acoustic device according to an embodiment of the present invention, in which fig. 1 shows a schematic sectional structural diagram of the bone conduction acoustic device according to the embodiment of the present invention, fig. 2 shows a schematic mounting structure of a vibrating spring arm and an acoustic transparent mesh layer of the bone conduction acoustic device according to the embodiment of the present invention, and fig. 3 shows a schematic structural diagram of the vibrating spring arm of the bone conduction acoustic device according to the embodiment of the present invention. For the sake of convenience, only the portions related to the embodiments of the present invention are shown in the drawings.
As is apparent from fig. 1, 2, and 3, the bone conduction acoustic device includes a housing and a bone conduction vibrator 21 provided in a cavity surrounded by the housing, a soft vibration portion 13 is provided on one side of the housing, a vibration transmitting member 22 is connected between a vibration output portion of the bone conduction vibrator 21 and the soft vibration portion 13, a radial support structure is provided between a cavity portion of the bone conduction vibrator 21 on the side away from the soft vibration portion 13 and the bone conduction vibrator 21, a plurality of front sound release holes 14 are provided at intervals on a portion of a side wall of the housing on the side of the soft vibration portion 13, and a plurality of rear sound release holes 15 are provided at intervals in the circumferential direction on a portion of the side wall of the housing away from the soft vibration portion 13.
When the soft vibration part 13 is worn, the soft vibration part 13 is contacted with a user, the bone conduction vibrator 21 emits a sound signal and generates vibration with corresponding frequency, the vibration is transmitted to the soft vibration part 13 through the vibration transmission piece 22, and then the vibration is transmitted to the user through the soft vibration part 13; because the radial supporting structure is arranged on the side, away from the soft vibration part 13, of the bone conduction vibrator 21, radial limitation can be formed, radial deflection generated when the bone conduction vibrator 21 vibrates is avoided, and the acoustic performance of the bone conduction acoustic device is improved; since the plurality of front sound vents 14 are provided at intervals on the side wall portion of the housing on the peripheral side of the soft vibrating portion 13, and the plurality of rear sound vents 15 are provided at intervals in the side wall portion of the housing away from the soft vibrating portion 13, sound signals are respectively transmitted from the plurality of front sound vents 14 and the plurality of rear sound vents 15, and sound pressure cancellation is generated on the peripheral side of the housing, so that sound leakage can be reduced.
In the present embodiment, the mounting shaft 23 is fixedly connected to the side of the bone conduction vibrator 21 away from the soft vibration portion 13; the radial supporting structure comprises a support 41 fixedly connected with the shell, a mounting hole is formed in the support 41 corresponding to the mounting shaft 23, the mounting shaft 23 is inserted into the mounting hole, the radial supporting structure further comprises a plurality of balls 42 arranged between the mounting hole and the mounting shaft 23 and arranged along the circumferential direction of the mounting shaft at intervals, a plurality of elastic expansion pieces 43 are arranged corresponding to the plurality of balls 42 respectively, and the plurality of balls 42 are pressed against the peripheral side face of the mounting shaft 23 respectively. Under the elastic force action of the elastic expansion pieces 43, the balls 42 are respectively pressed against the peripheral side surface of the mounting shaft 23, so that the radial limitation and centering effects can be formed, the radial deflection generated when the bone conduction vibrator 21 vibrates can be avoided, the axial vibration of the bone conduction vibrator 21 can not be deflected, and the acoustic performance of the bone conduction acoustic device can be improved.
Specifically, a radial hole is formed in the inner sidewall of the mounting hole corresponding to each set of the elastic expansion piece 43 and the ball 42, the elastic expansion piece 43 is disposed in the radial hole, and the ball 42 is disposed at the end of the radial hole and has a portion exposed outside the radial hole.
Typically, the resilient bellows 43 is a spring.
In this embodiment, an acoustic mesh layer 32 is provided in a cavity portion between the bone conduction vibrator 21 and the soft vibrating portion 13, the cavity surrounded by the housing is divided into a front acoustic cavity and a rear acoustic cavity by the acoustic mesh layer 32, the bone conduction vibrator 21 is provided in the rear acoustic cavity, the vibration transmitting member 22 passes through the acoustic mesh layer 32, the front sound release hole 14 is provided corresponding to the front acoustic cavity, and the rear sound release hole 15 is provided corresponding to the rear acoustic cavity. The sound-transmitting mesh layer 32 blocks the sound signal emitted from the bone conduction vibrator 21, and the sound signals emitted from the front and rear sound-leaking holes 14 and 15 are more cancelled by the sound pressure at the peripheral side of the housing, thereby further reducing the sound leakage.
A vibration elastic arm 31 is fixedly mounted in the cavity between the bone conduction vibrator 21 and the soft vibration portion 13, and the sound-transmitting mesh layer 32 is fixed to the vibration elastic arm 31, so that the sound-transmitting mesh layer 32 can be mounted easily, and the vibration performance of the bone conduction vibrator 21 in the axial direction can be enhanced. The vibration elastic arm 31 includes an outer ring 311, an inner ring 312 disposed concentrically with the outer ring 311, and a plurality of elastic arms 313 connected between the outer ring 311 and the inner ring 312, the vibration transmission member 22 passes through the inner ring 312 and is fixedly connected with the inner ring 312, and generally, the outer ring 311, the plurality of elastic arms 313, and the inner ring 312 are an integral member formed by injection molding.
Specifically, the sound-transmitting mesh layer 32 is made of mesh cloth and is fixedly connected with the vibrating elastic arm 31 in an adhesion mode.
In this embodiment, the casing includes a box-shaped case 11, and an upper cover 12 covering the mouth end of the box-shaped case 11, the soft vibrating portion 13 is provided on the upper cover 12, the plurality of back vent holes 15 are provided on the peripheral side wall of the box-shaped case 11, and the bracket 41 is provided on the bottom side wall of the box-shaped case 11.
The holder 41 is generally plate-shaped and is fixedly connected to the bottom side wall of the box-shaped case 11, but may be integrally formed with the bottom side wall of the box-shaped case 11.
The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a bone conduction acoustic device, includes the shell and sets up bone conduction oscillator in the cavity is enclosed into to the shell be equipped with soft vibration portion on one side of shell the vibration output portion of bone conduction oscillator with be connected with the vibration transmission piece between the soft vibration portion, its characterized in that the bone conduction oscillator is kept away from the cavity part of soft vibration portion one side with be equipped with radial bearing structure between the bone conduction oscillator be equipped with a plurality of preceding holes of leaking at the interval on the shell side wall part of soft vibration portion week side, keeping away from be equipped with along a plurality of holes of leaking after circumference spaced on the shell side wall part of soft vibration portion.
2. The bone conduction acoustic device according to claim 1, wherein a mounting shaft is fixedly connected to a side of the bone conduction vibrator remote from the soft vibration portion; the radial supporting structure comprises a support fixedly connected with the shell, a mounting hole is formed in the support corresponding to the mounting shaft, the mounting shaft is inserted into the mounting hole, the radial supporting structure further comprises a plurality of elastic telescopic pieces, the elastic telescopic pieces are arranged between the mounting hole and the mounting shaft and along the plurality of balls arranged at intervals in the circumferential direction of the mounting shaft and correspond to the plurality of balls in the ball positions respectively, and the balls are pressed against the peripheral side face of the mounting shaft respectively.
3. The bone conduction acoustic device according to claim 2, wherein a radial hole is provided in an inner side wall of the mounting hole at each of the sets of the elastic expansion member and the ball, the elastic expansion member being provided in the radial hole, the ball being provided at an end of the radial hole and having a portion exposed outside the radial hole.
4. The bone conduction acoustic device according to claim 2, wherein an acoustic transparent mesh layer is attached to a cavity portion between the bone conduction vibrator and the soft vibrating portion, the acoustic transparent mesh layer divides a cavity surrounded by the housing into a front acoustic cavity and a rear acoustic cavity, the bone conduction vibrator is disposed in the rear acoustic cavity, the vibration transmitting member passes through the acoustic transparent mesh layer, the front sound release hole is disposed corresponding to the front acoustic cavity, and the rear sound release hole is disposed corresponding to the rear acoustic cavity.
5. The bone conduction acoustic device according to claim 4, wherein a vibration elastic arm is further fixedly mounted at the cavity portion between the bone conduction vibrator and the soft vibration portion, and the sound-transmitting mesh layer is fixed to the vibration elastic arm.
6. The bone conduction acoustic device of claim 5, wherein the acoustically transparent mesh layer is mesh bonded to the vibrating elastic arm.
7. The bone conduction acoustic device according to claim 5, wherein the vibration elastic arm includes an outer ring, an inner ring disposed concentrically with the outer ring, and a plurality of elastic arms connected between the outer ring and the inner ring, the vibration transmission member passing through the inner ring and fixedly connected to the inner ring.
8. The bone conduction acoustic device of claim 7, wherein the outer ring, the plurality of spring arms, and the inner ring are a unitary piece that is injection molded.
9. The bone conduction acoustic device according to any one of claims 2 to 8, wherein the housing includes a box-shaped casing, an upper cover provided on a box mouth end of the box-shaped casing, the soft vibrating portion is provided on the upper cover, the plurality of rear sound leakage holes are provided on a peripheral side wall of the box-shaped casing, and the bracket is provided on a bottom side wall of the box-shaped casing.
10. The bone conduction acoustic device of claim 9, wherein the bracket is plate-shaped, and the bracket is fixedly connected with the bottom side wall of the box-shaped casing, or the bracket and the bottom side wall of the box-shaped casing are of an integrated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911390872.2A CN111163394A (en) | 2019-12-30 | 2019-12-30 | Bone conduction acoustic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911390872.2A CN111163394A (en) | 2019-12-30 | 2019-12-30 | Bone conduction acoustic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111163394A true CN111163394A (en) | 2020-05-15 |
Family
ID=70559309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911390872.2A Pending CN111163394A (en) | 2019-12-30 | 2019-12-30 | Bone conduction acoustic device |
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| Country | Link |
|---|---|
| CN (1) | CN111163394A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114598977A (en) * | 2022-05-10 | 2022-06-07 | 迈感微电子(上海)有限公司 | MEMS microphone and voice communication equipment |
-
2019
- 2019-12-30 CN CN201911390872.2A patent/CN111163394A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114598977A (en) * | 2022-05-10 | 2022-06-07 | 迈感微电子(上海)有限公司 | MEMS microphone and voice communication equipment |
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