CN110730410A - Bone conduction speaker, bone conduction earphone and bone conduction hearing aid - Google Patents
Bone conduction speaker, bone conduction earphone and bone conduction hearing aid Download PDFInfo
- Publication number
- CN110730410A CN110730410A CN201910944469.3A CN201910944469A CN110730410A CN 110730410 A CN110730410 A CN 110730410A CN 201910944469 A CN201910944469 A CN 201910944469A CN 110730410 A CN110730410 A CN 110730410A
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- magnetic
- bone conduction
- conduction speaker
- vibrating
- magnet
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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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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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
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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
- H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
- H04R25/604—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers
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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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/13—Hearing devices using bone conduction transducers
Abstract
The invention discloses a bone conduction speaker, a bone conduction earphone and a bone conduction hearing aid. The bone conduction speaker described above includes: the magnetic assembly comprises a first magnetic part and a second magnetic part, a through hole is formed in the middle of the first magnetic part, and the second magnetic part penetrates through the through hole, so that a magnetic gap is formed between the two opposite sides of the first magnetic part corresponding to the through hole and the second magnetic part; a voice coil mounted within the magnetic gap; a vibrating member mounted near one end of the magnetic assembly, the vibrating member being connected to and electrically communicated with the voice coil; a conductor connected to the vibrator; the supporting component is used for supporting the magnetic assembly and the vibrating piece; both the bone conduction hearing aid and the bone conduction earphone comprise the bone conduction speaker. The bone conduction loudspeaker has good sound wave transmission effect and good sound quality.
Description
Technical Field
The invention relates to the technical field of speakers, in particular to a bone conduction speaker, a bone conduction earphone and a bone conduction hearing aid.
Background
Bone conduction is a sound conduction mode, namely, sound is converted into mechanical vibration with different frequencies, and sound waves are transmitted through the skull, the bone labyrinth, the lymph fluid transmission of the inner ear, the spiral organ, the auditory nerve and the auditory center of a human body. Compared with a classical sound conduction mode of generating sound waves through a vibrating diaphragm, the bone conduction mode omits a plurality of sound wave transmission steps, can realize clear sound restoration in a noisy environment, and does not influence other people due to the fact that the sound waves are diffused in the air.
The bone conduction speaker technology is used for receiving, sound waves (vibration signals) converted from electric signals are directly transmitted to auditory nerves through bones, and transmission media of the sound waves (vibration signals) are different.
The current bone conduction speaker is generally worn in front of the ear through an ear hoop and conducted into the ear of a person through the ear bone, the U-shaped iron and the magnet are installed inside the bone conduction speaker, the elastic sheet is installed in the gap of the magnet, and vibration is generated between the elastic sheets. The existing wearing mode is usually large in size, and if the loudspeaker is made to be miniature, the size of the magnet is reduced, and the sound wave transmission effect is also poor.
Disclosure of Invention
Accordingly, the present invention is directed to a bone conduction speaker having a good sound wave transmission effect and a good sound quality.
The invention also provides a bone conduction earphone.
The invention also provides a bone conduction hearing aid.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
a bone conduction speaker, comprising:
the magnetic assembly comprises a first magnetic part and a second magnetic part, a through hole is formed in the middle of the first magnetic part, and the second magnetic part penetrates through the through hole, so that a magnetic gap is formed between the two opposite sides of the first magnetic part corresponding to the through hole and the second magnetic part;
a voice coil mounted within the magnetic gap;
a vibrating member mounted near one end of the magnetic assembly, the vibrating member being connected to and electrically communicated with the voice coil;
a conductor connected to the vibrator; and
and the supporting component is used for supporting the magnetic assembly and the vibrating piece.
Above-mentioned bone conduction speaker, magnetic component comprise two at least magnets, and when the volume of whole speaker reduced, the volume of magnet also can not influenced, can increase even, just so do not influence the transmission effect of sound wave, when the volume of speaker diminishes, can guarantee the tone quality effect effectively.
In some embodiments, the magnetic assembly further includes a first magnetic conducting member connected to an end of the first magnetic member close to the vibrating member, and a second magnetic conducting member connected to an end of the second magnetic member close to the vibrating member.
In some embodiments, the vibrator is made of a hard material and houses a circuit element, and the voice coil is connected to the vibrator and electrically connected to the circuit element.
In some embodiments, the vibrating member is a metal sheet, a plastic sheet or a carbon fiber sheet with the circuit element embedded therein.
In some embodiments, the bone conduction speaker further includes a third magnetic conductive member, and the third magnetic conductive member is installed at an end of the first magnetic member far from the vibrating member and an end of the second magnetic member far from the vibrating member.
In some embodiments, the first magnetic member is a magnet, the second magnetic member is a metal generating a magnetic field with the magnet, the third magnetic conductive member is a metal magnetically attracted with the magnet, and the third magnetic conductive member and the second magnetic member are integrally formed.
In some embodiments, the bone conduction speaker further includes a circuit board connected to an end of the third magnetic conductive member away from the first magnetic member, and the vibrating member is electrically connected to the circuit board through a conductive member. In some embodiments, a first slot is formed outside the supporting component, a second slot is formed outside the first magnetic conducting member, third slots are formed outside the first magnetic member, and the conductive member is guided to the circuit board by the first slot, the second slot, and the third slot in sequence.
In some embodiments, the first magnetic member is a magnet, and the second magnetic member is a metal magnetically attracted with the magnet; or the first magnetic part and the second magnetic part are both magnets.
The invention also provides a bone conduction earphone which comprises the bone conduction loudspeaker.
The invention also provides a bone conduction hearing aid comprising the bone conduction loudspeaker.
Drawings
Fig. 1 is a schematic structural diagram of a bone conduction speaker according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a bone conduction speaker according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a bone conduction speaker according to a third embodiment of the present invention.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the following description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example one
Referring to fig. 1, the present invention provides a bone conduction speaker 100, which includes a magnetic assembly 10, a voice coil 20, a vibrating element 30, a conducting element 40 and a supporting member 50, wherein the magnetic assembly 10 is used for providing a magnetic field to the voice coil 20, the voice coil 20 is used for cutting magnetic induction lines to generate electromotive force, the vibrating element 30 is used for connecting the voice coil 20, conducting a circuit to transmit vibration, and the conducting element 40 is used for vibrating and conducting sound waves.
In operation, the voice coil 20 is energized to generate vibration in the magnetic field generated by the magnetic assembly 10, and the diaphragm 30 and the conductor 40 vibrate accordingly. Because the magnetic component 10 at least comprises two combined magnetic parts, when the volume of the whole loudspeaker is reduced, the volume of the magnetic component 10 can be unchanged or enlarged, the influence on the volume of the magnetic component 10 is small, and the transmission effect of sound waves is not influenced when the volume of the whole loudspeaker is reduced, so that the sound quality is effectively ensured.
Referring to fig. 1, the magnetic assembly 10 includes a first magnetic member 11 and a second magnetic member 12, a through hole 13 is formed in a middle portion of the first magnetic member 11, and the second magnetic member 12 is installed in the through hole 13, so that a magnetic gap 14 is formed between two opposite sides of the first magnetic member 11 corresponding to the through hole 13 and the second magnetic member 12. The first magnetic member 11 and the second magnetic member 12 can generate a strong magnetic field, and when the voice coil 20 is installed in the magnetic gap 14, the magnetic induction lines can be cut strongly, thereby ensuring a good sound quality.
The shapes of the first magnetic member 11 and the second magnetic member 12 may be set as required.
In one embodiment, the first magnetic member 11 is in a ring shape to form a through hole 13 in the middle of the first magnetic member 11, and the second magnetic member 12 is in a block shape and is installed in the through hole 13 without contacting the side wall of the first magnetic member 11, thereby forming the magnetic gap 14. The second magnetic member 12 may be in the shape of a ring, a block, a strip, etc., and may be matched with the first magnetic member 11.
One of the first magnetic member 11 and the second magnetic member 12 is a magnet, and the other is a magnet or a metal capable of generating magnetic attraction with the magnet. For example, the first magnetic member 11 is a magnet, the second magnetic member 12 is a metal iron, or the first magnetic member 11 is a metal iron, and the second magnetic member 12 is a magnet, or both the first magnetic member 11 and the second magnetic member 12 are magnets, which can achieve the purpose of generating a magnetic circuit.
Of course, the first magnetic member 11 and the second magnetic member 12 may have other shapes. The magnetic assembly 10 may also include three or more magnetic members. There is a tendency to select fewer magnetic members to form the magnetic assembly 10 so that the overall connection structure is more stable.
Further, the magnetic assembly 10 further includes a first magnetic conductive member 15 connected to an end of the first magnetic member 11 close to the vibrating member 30, and a second magnetic conductive member 16 connected to an end of the second magnetic member 12 close to the vibrating member 30. The first magnetic conductive member 15 and the second magnetic conductive member 16 can function as magnetic conductors. The first magnetic conductive member 15 and the second magnetic conductive member 16 may be a metal or a magnet that generates magnetic attraction, and preferably, the metal generates magnetic attraction, such as ferrous metal.
Further, the magnetic assembly 10 further includes a third magnetic conductive member 17, and the third magnetic conductive member 17 is installed at the end portions of the first magnetic member 11 and the second magnetic member 12 far away from the vibrating member 30. The third magnetic conductive member 17 can serve the purpose of mounting the first magnetic member 11 and the second magnetic member 12, and can also serve a magnetic conductive function. The third magnetic conductive member 17 may be a metal that generates magnetic attraction, or may be a magnet, preferably a metal that cooperates with the magnet, such as iron.
The third magnetic conductive member 17 and the second magnetic member 12 may be provided separately or integrally. In this embodiment, the third magnetic conductive member 17 and the second magnetic member 12 are separately disposed.
The voice coil 20 is mounted in the magnetic gap 14 of the magnetic assembly 10. The voice coil 20 cuts magnetic lines of force to generate electromotive force, and the shape, structure, and material thereof are not limited as long as the function can be achieved.
In one embodiment, the voice coil 20 is in the shape of a ring and is directly mounted in the annular magnetic gap 14.
With reference to fig. 1, a vibration member 30 is installed near one end of the magnetic assembly 10, the vibration member 30 is connected to the voice coil 20 and is electrically connected to the voice coil 20, so that the entire speaker is electrically connected, and the vibration member 30 vibrates when the voice coil 20 vibrates, so that the vibration is transmitted to the conductive member 40.
In one embodiment, the outer end of the vibrating member 30 is provided with a pad through which an external circuit is connected, thereby conducting the circuit of the entire speaker. Of course, the vibrating member 30 may be connected to an external circuit in other ways. For example, external circuits are conducted through the circuit board.
In one embodiment, the vibrating member 30 is a vibrating plate. The thickness of the vibrating plate is smaller, and vibration is more conveniently transmitted.
In one embodiment, the vibrator 30 is made of a hard material and houses a circuit element, and the voice coil 20 is connected to the vibrator 30 and electrically connected to the circuit element. Since the voice coil 20 is directly connected to the vibrating member 30, the vibrating member 30 is made of a hard material, so that stability when the vibrating member 30 is connected to the voice coil can be ensured, and stability when the vibrating member 30 vibrates with the voice coil 20 can be ensured. In contrast, in a general soft vibrator, the voice coil 20 needs to be connected to an auxiliary member or a gap needs to be provided between the voice coil 20 and the auxiliary member.
For example, the vibrating member 30 is a steel sheet, a plastic sheet, or a carbon fiber sheet with a built-in circuit element.
Of course, the vibrating member 30 may be made of other elastic members, such as a common metal sheet, but the stability effect is not as good as that of a hard material.
The conductive member 40 is connected to the vibration member 30 and is an element for vibration conduction of sound. When the vibrating member 30 vibrates, the vibration is transmitted to the conductive member 40. The conductive element 40 may be a piezoelectric ceramic sheet, a PC conductive sheet, or other conductive elements.
In one embodiment, the conducting element 40 is connected to an end of the vibrating element 30 away from the magnetic assembly 10.
The supporting member 50 serves to support the vibrator 30 and the magnetic assembly 10, and provides support to stabilize the installation structure of the vibrator 30 and the magnetic assembly 10. The support member 50 may be made of, for example, plastic, iron, low carbon steel, or the like. The connection between the support member 50 and the vibrator 30 and the magnetic assembly 10 can be made by gluing, connecting members, etc.
The support member 50 may be made of metal, plastic, and other hard materials.
The supporting member 50 may be supported only between the magnetic assembly 10 and the vibrator 30, may cover both sides of the magnetic assembly 10, or may cover only one side of the magnetic assembly 10. In this embodiment, the supporting member 50 has a ring shape and is installed between the magnetic assembly 10 and the vibrator 30.
In one embodiment, the bone conduction speaker 100 further includes a circuit board 60, the circuit board 60 is mounted on a side of the third magnetic conductive member 17 away from the magnetic assembly 10, and the vibrating member 30 is electrically connected to the circuit board 60 through the conductive member. The circuit board 60 can be used to more conveniently connect with external circuitry. In an embodiment, a first wire slot is formed outside the supporting component 50, a second wire slot is formed outside the first magnetic conducting member 15, third wire slots are formed outside the first magnetic member 11, and the conductive member is guided to the circuit board 60 sequentially through the first wire slot, the second wire slot, and the third wire slot. The wire groove is arranged, on one hand, the conductive piece can be conveniently guided to the circuit board 60, on the other hand, the conductive piece can be hidden and not exposed, so that the volume of the shell for wrapping the whole loudspeaker can be reduced, and the miniature loudspeaker can be conveniently prepared. The conductive member is, for example, a wire, a conductive sheet, etc.
The bone conduction speaker 100 may further include a housing covering the above components, so that the entire speaker is prevented from magnetic leakage. The casing can be provided with a sound amplifying hole, and the sound generated by the loudspeaker can be emitted to human ears through the sound amplifying hole.
Example two
Referring to fig. 2, the bone conduction speaker of the present embodiment is substantially the same as the bone conduction speaker of the first embodiment, except that the third magnetic conductive member 17 and the second magnetic member 12 are integrally disposed, the second magnetic member 12 is a metal capable of attracting a magnet, and the third magnetic conductive member 17 and the second magnetic member 12 form a T-shaped iron, which is more convenient to mount. At this time, since both the third magnetic conductive member 17 and the second magnetic member 12 can conduct magnetism, the second magnetic conductive member 16 needs to be removed.
EXAMPLE III
Referring to fig. 2, the bone conduction speaker of the present embodiment is substantially the same as the bone conduction speaker of the first or second embodiment, except that the supporting member 50 is annular and is located between the magnetic element 10 and the vibrating element 30 and covers one side of the magnetic element 10.
Example four
Referring to fig. 3, the bone conduction speaker of the present embodiment is substantially the same as the bone conduction speaker of the first or second embodiment, except that the supporting member 50 is annular and covers both sides of the magnetic assembly 10, at this time, a wire slot may be formed in the supporting member 50, and the conductive member may extend from the wire slot of the supporting member 50 to be connected to the circuit board 60.
EXAMPLE five
The present embodiment provides a bone conduction headset, which includes the bone conduction speaker according to any one of the first to third embodiments. This bone conduction speaker installs back in the bone conduction earphone for bone conduction earphone can be done less, and tone quality is better moreover.
EXAMPLE six
The present embodiment provides a bone conduction hearing aid including the bone conduction speaker according to any one of the first to third embodiments. After the bone conduction loudspeaker is installed in the bone conduction hearing aid, the bone conduction hearing aid can be made smaller, and the sound quality is better.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. A bone conduction speaker, comprising:
the magnetic assembly comprises a first magnetic part and a second magnetic part, a through hole is formed in the middle of the first magnetic part, and the second magnetic part penetrates through the through hole, so that a magnetic gap is formed between the two opposite sides of the first magnetic part corresponding to the through hole and the second magnetic part;
a voice coil mounted within the magnetic gap;
a vibrating member mounted near one end of the magnetic assembly, the vibrating member being connected to and electrically communicated with the voice coil;
a conductor connected to the vibrator; and
and the supporting component is used for supporting the magnetic assembly and the vibrating piece.
2. The bone conduction speaker of claim 1, wherein the first magnetic member has a ring shape to form the through-hole at a middle portion of the first magnetic member.
3. The bone conduction speaker of claim 1, wherein the magnetic assembly further comprises a first magnetic conductor connected to an end of the first magnetic member near the vibrating member and a second magnetic conductor connected to an end of the second magnetic member near the vibrating member.
4. The bone conduction speaker as claimed in claim 1, wherein the vibrator is made of a hard material and incorporates a circuit element, and the voice coil is connected to the vibrator and electrically connected to the circuit element.
5. The bone conduction speaker as claimed in claim 4, wherein the vibrating member is a metal sheet, a plastic sheet or a carbon fiber sheet in which the circuit element is built.
6. The bone conduction speaker of claim 1, further comprising a third magnetic conductive member mounted to an end of the first magnetic member remote from the vibrating member and an end of the second magnetic member remote from the vibrating member.
7. The bone conduction speaker of claim 6, wherein the first magnetic member is a magnet, the second magnetic member is a metal that generates a magnetic field with the magnet, the third magnetic conductive member is a metal that magnetically attracts the magnet, and the third magnetic conductive member is integrally formed with the second magnetic member.
8. The bone conduction speaker according to claim 6 or 7, further comprising a circuit board connected to an end of the third magnetic conductive member remote from the first magnetic member, wherein the vibrating member is electrically connected to the circuit board through a conductive member.
9. The bone conduction speaker according to claim 8, wherein a first slot is formed outside the supporting member, a second slot is formed outside the first magnetic conductive member, third slots are formed outside the first magnetic member, and the conductive member is guided to the circuit board by the first slot, the second slot, and the third slot in sequence.
10. The bone conduction speaker as claimed in claim 1, wherein the first magnetic member is a magnet, and the second magnetic member is a metal magnetically attracted to the magnet; or the first magnetic part and the second magnetic part are both magnets.
11. A bone conduction headset characterized by comprising the bone conduction speaker of any one of claims 1-10.
12. A bone conduction hearing aid comprising the bone conduction speaker according to any one of claims 1 to 10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910944469.3A CN110730410A (en) | 2019-09-30 | 2019-09-30 | Bone conduction speaker, bone conduction earphone and bone conduction hearing aid |
| PCT/CN2020/108416 WO2021063112A1 (en) | 2019-09-30 | 2020-08-11 | Bone conduction loudspeaker, bone conduction headphones and bone conduction hearing aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910944469.3A CN110730410A (en) | 2019-09-30 | 2019-09-30 | Bone conduction speaker, bone conduction earphone and bone conduction hearing aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110730410A true CN110730410A (en) | 2020-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910944469.3A Pending CN110730410A (en) | 2019-09-30 | 2019-09-30 | Bone conduction speaker, bone conduction earphone and bone conduction hearing aid |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110730410A (en) |
| WO (1) | WO2021063112A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021063112A1 (en) * | 2019-09-30 | 2021-04-08 | 朱达云 | Bone conduction loudspeaker, bone conduction headphones and bone conduction hearing aid |
| CN113271513A (en) * | 2021-05-10 | 2021-08-17 | 苏州索迩电子技术有限公司 | Bone conduction sound generating device and wearable equipment |
| WO2021218709A1 (en) * | 2020-04-29 | 2021-11-04 | 深圳市韶音科技有限公司 | Acoustic device, and magnetic circuit assembly thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100390003B1 (en) * | 2002-10-02 | 2003-07-04 | Joo Bae Kim | Bone-conduction speaker using vibration plate and mobile telephone using the same |
| KR100378156B1 (en) * | 2002-08-16 | 2003-03-29 | Joo Bae Kim | Ultra-small bone conduction speaker by using diaphragm and mobile phone having the same |
| CN207184767U (en) * | 2017-09-18 | 2018-04-03 | 东莞市赞歌声学科技有限公司 | A kind of new bone conduction earphone |
| CN110730410A (en) * | 2019-09-30 | 2020-01-24 | 东莞市赞歌声学科技有限公司 | Bone conduction speaker, bone conduction earphone and bone conduction hearing aid |
-
2019
- 2019-09-30 CN CN201910944469.3A patent/CN110730410A/en active Pending
-
2020
- 2020-08-11 WO PCT/CN2020/108416 patent/WO2021063112A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021063112A1 (en) * | 2019-09-30 | 2021-04-08 | 朱达云 | Bone conduction loudspeaker, bone conduction headphones and bone conduction hearing aid |
| WO2021218709A1 (en) * | 2020-04-29 | 2021-11-04 | 深圳市韶音科技有限公司 | Acoustic device, and magnetic circuit assembly thereof |
| CN113271513A (en) * | 2021-05-10 | 2021-08-17 | 苏州索迩电子技术有限公司 | Bone conduction sound generating device and wearable equipment |
| CN113271513B (en) * | 2021-05-10 | 2023-02-17 | 苏州索迩电子技术有限公司 | Bone conduction sound generating device and wearable equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021063112A1 (en) | 2021-04-08 |
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