CN106210995B - Noise-proofing bone-conduction speaker manufacturing method - Google Patents
Noise-proofing bone-conduction speaker manufacturing method Download PDFInfo
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- CN106210995B CN106210995B CN201610644443.3A CN201610644443A CN106210995B CN 106210995 B CN106210995 B CN 106210995B CN 201610644443 A CN201610644443 A CN 201610644443A CN 106210995 B CN106210995 B CN 106210995B
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- vibration
- balanced armature
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- fixed
- panel
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000003292 glue Substances 0.000 claims abstract description 12
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 11
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 11
- 229920001194 natural rubber Polymers 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000010439 graphite Substances 0.000 claims abstract description 7
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 5
- 239000010963 304 stainless steel Substances 0.000 claims description 4
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000002087 whitening effect Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 210000000988 bone and bone Anatomy 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 230000010355 oscillation Effects 0.000 abstract 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 210000000860 cochlear nerve Anatomy 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 210000003454 tympanic membrane Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000000613 ear canal Anatomy 0.000 description 1
- 210000000883 ear external Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000001061 forehead Anatomy 0.000 description 1
- 206010033675 panniculitis Diseases 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 210000004304 subcutaneous tissue Anatomy 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
Abstract
The invention discloses a kind of noise-proofing bone-conduction speaker and its manufacturing methods, including magnet bottom plate, permanent magnet, balanced armature, pivot, coil and vibrating diaphragm constitute magnetic system, the balanced armature being fixed on pivot can move up and down, balanced armature is located at the central point of permanent magnet, so balanced armature can move in permanent magnetic field, there is no magnetic field force to act on it when balanced armature is located at the center point in magnetic field, this state is equilibrium state, when there is current through coil, balanced armature can be carried out unidirectional or reversely be magnetized, balanced armature generates positive or negative sense movement for the central point of permanent magnet, so as to cause air flowing, lead to diaphragm oscillations, vibration-transmitting plate and panel are connect by passing vibration column with magnetic system；The bone-conduction speaker can transfer vibrations to people's bone, to generate sound by panel and external connection, loudspeaker ontology is equipped with natural rubber, it can prevent loudspeaking ontology from vibrating and generating noise, naturally as being coated with soft graphite on glue, electromagnetic interference can be prevented, reduce noise, enclosed construction is not interfered by outside environmental elements, and clear sound is without noise, it is noiseless, for a long time using will not lose one's head.
Description
Technical field
The present invention relates to bone-conduction speaker technical fields, and in particular to a kind of noise-proofing bone-conduction speaker and its manufacture
Method.
Background technique
In the prior art, the principle of acoustic is because the vibration in air is transmitted to vibration by external ear ear canal
Thus ear-drum perceives the vibration of sound by the auditory nerve for the vibratory drive people that ear-drum is formed.Existing bone-conduction speaker
At work, usually by the way that the auditory nerve of people can be transmitted to the skin, subcutaneous tissue and bone of people, to make one to hear sound
Sound.In current existing bone-conduction speaker work, along with the vibration of oscillating plate, via the fixed oscillating plate of fixed block
Shell generates vibration also with oscillating plate, so by the hull vibration face contact after ear, the positions such as cheek or forehead, vibration
It can serve as osteoacusis sound to be transmitted, so as to clearly hear sound.However, existing bone-conduction speaker is by outer
Boundary's temperature, humidity, the environmental disturbances such as electromagnetic wave, noise is too many in the presence of a harsh environment, and sound quality is unintelligible；And bone-conduction speaker
Noise is big, for a long time using cause to lose one's head etc. it is uncomfortable feel, be easy to bring burden to wearer, in terms of electroacoustic conversion ratio
Transfer efficiency is low, causes power consumption big, and cruising ability is insufficient.
Summary of the invention
It is unintelligible for above-mentioned existing bone-conduction speaker sound quality, the problems such as noise is big, technology to be solved by this invention
Problem is to provide a kind of noise-proofing bone-conduction speaker and its manufacturing method.
In order to solve the above technical problems, the technical scheme adopted by the invention is as follows: a kind of noise-proofing bone-conduction speaker, including
Panel and permanent magnet, it is characterised in that: the below the panel is equipped with vibration-transmitting plate, is equipped with vibrating diaphragm, the biography below the vibration-transmitting plate
Vibration piece is fixed on biography vibration column, and the vibrating diaphragm is fixed on biography vibration column, and the biography vibration column is fixed on panel, the below the panel
For loudspeaker ontology, the loudspeaker ontology inside is equipped with vibrationproof layer, and the vibrationproof layer is equipped with anti-interference layer, the loudspeaker
Ontology is equipped with through-hole, is equipped with electric wire described in electric wire in through-hole and connect across through-hole with coil, and the coil is wrapped in balance rank
On iron, permanent magnet is equipped in the loudspeaker ontology, the balanced armature passes through the middle part of pivot fixing permanent magnet, the permanent magnetism
On magnet bottom plate, the through-hole is filled using glue for ferropexy.
The preferred embodiment of above scheme are as follows: the vibration-transmitting plate is with a thickness of 0.08-0.2mm.
The preferred embodiment of above scheme are as follows: the magnet bottom plate is equipped with groove.
The preferred embodiment of above scheme are as follows: the glue is happy Thailand's loctite3011 medical type UV solidification glue or other has
The glue of identical function.
The preferred embodiment of above scheme are as follows: the vibrationproof layer is natural rubber.
The preferred embodiment of above scheme are as follows: the shielded layer is soft graphite or material with the same function.
Correspondingly, the present invention has supplied a kind of noise-proofing bone-conduction speaker manufacturing method, includes the following steps:
(1) it selects vibration-transmitting plate and panel for 304 stainless steel material of SUS, vibration-transmitting plate is fabricated to the thickness of 0.08-0.2mm
Degree；
(2) vibration-transmitting plate and panel surface fire are baked into heat treatment, generates black oxidation skin, using nonhazardous with inorganic
The cleaning solution of additive is embathed, and the whitening processing purpose of stainless steel true qualities is reached；
(3) vibration-transmitting plate is fixed on biography vibration column, then fixed vibrating diaphragm, to passing on vibration column, then the fixed vibration column that passes is to panel
On；
(4) natural rubber will be installed on the inside of loudspeaker ontology, coats soft graphite on the surface of natural rubber, it is then solid
Determine in pivot and magnet bottom plate to loudspeaker ontology, on the groove of last fixing permanent magnet to magnet bottom plate；
(5) taking balanced armature length is 4-6mm, and coil is wound since from the 0.4mm of balanced armature top, and line footpath is
0.4-0.8mm, leading-in end of the end of inner most winding layer as coil, the end of outermost winding layer is as coil
Exit, leading-in end are located at the right end of balanced armature, and winding layer number is 4-8 layers；
(6) balanced armature for winding coil is fixed on the pivot of loudspeaker body interior；
(7) it is connected using electric wire with coil, electric wire passes through the through-hole on loudspeaker ontology, fills in through-holes
Loctite3011, UV glue, UV is solidified to, energy 100mW/cm2, the time: 30S using ultraviolet light will play fixed electric wire
Effect, while loudspeaker can be sealed；
(8) panel is fixed on loudspeaker ontology, and is sealed.
Beneficial effect is: bone-conduction speaker of the present invention passes through above-mentioned magnet bottom plate, permanent magnet, balanced armature, pivot
Axis, coil and vibrating diaphragm constitute magnetic system, and the balanced armature being fixed on pivot can move up and down, and balanced armature is located at permanent magnetism
The central point of iron does not have magnetic when balanced armature is located at the center point in magnetic field so balanced armature can move in permanent magnetic field
Field force acts on it, this state is equilibrium state, and when there is current through coil, balanced armature can be carried out unidirectional or reversely be filled
Magnetic, balanced armature generate positive or negative sense movement for the central point of permanent magnet, so as to cause air flowing, cause to shake
Film vibration, vibration-transmitting plate and panel are connect by passing vibration column with magnetic system；The bone-conduction speaker, can by panel and external connection
Transfer vibrations to people's bone, to generate sound, loudspeaker ontology is equipped with natural rubber, can prevent loudspeaking ontology vibrate and
Noise is generated, naturally as being coated with soft graphite on glue, electromagnetic interference can be prevented, reduce noise, enclosed construction, not by the external world
Environmental factor interference, clear sound is noiseless without noise, for a long time using will not lose one's head.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
Below with reference to embodiment pair, further description of the technical solution of the present invention.
Embodiment 1
As shown in Figure 1, the present embodiment noise-proofing bone-conduction speaker, including panel 8 and permanent magnet 4, it is equipped with below panel 8
Vibration-transmitting plate 1 is equipped with vibrating diaphragm 2 below vibration-transmitting plate 1, and vibration-transmitting plate 1 is fixed on biography vibration column 9, and vibrating diaphragm 2 is fixed on biography vibration column 9, passes vibration
Column 9 is fixed on panel 8, is loudspeaker ontology 3 below panel 8, is equipped with vibrationproof layer 14, vibrationproof layer 14 on the inside of loudspeaker ontology 3
It is equipped with shielded layer 15, loudspeaker ontology 3 is equipped with through-hole 11, electric wire 10 is equipped in through-hole 11, and electric wire 10 passes through through-hole 11
It is connect with coil 7, coil 7 is wrapped on balanced armature 5, and permanent magnet 4 is equipped in loudspeaker ontology 3, and balanced armature 5 passes through pivot
The middle part of 12 fixing permanent magnets 4, permanent magnet 4 are fixed on magnet bottom plate 6, and through-hole 11 is filled using glue 13.
The present embodiment noise-proofing bone-conduction speaker manufacturing method, includes the following steps:
(1) it selects vibration-transmitting plate and panel for 304 stainless steel material of SUS, vibration-transmitting plate is fabricated to the thickness of 0.08mm；
(2) vibration-transmitting plate and panel surface fire are baked into heat treatment, generates black oxidation skin, using nonhazardous with inorganic
The cleaning solution of additive is embathed, and the whitening processing purpose of stainless steel true qualities is reached；
(3) vibration-transmitting plate is fixed on biography vibration column, then fixed vibrating diaphragm, to passing on vibration column, then the fixed vibration column that passes is to panel
On；
(4) natural rubber will be installed on the inside of loudspeaker ontology, coats soft graphite on the surface of natural rubber, it is then solid
Determine in pivot and magnet bottom plate to loudspeaker ontology, on the groove of last fixing permanent magnet to magnet bottom plate；
(5) taking balanced armature length is 4mm, and coil is wound since from the 0.4mm of balanced armature top, and line footpath is
0.4mm, leading-in end of the end of inner most winding layer as coil, extraction of the end of outermost winding layer as coil
End, leading-in end are located at the right end of balanced armature, and winding layer number is 4 layers；
(6) balanced armature for winding coil is fixed on the pivot of loudspeaker body interior；
(7) it is connected using electric wire with coil, electric wire passes through the through-hole on loudspeaker ontology, fills in through-holes
Loctite3011, UV glue, UV is solidified to, energy 100mW/cm2, the time: 30S using ultraviolet light will play fixed electric wire
Effect, while loudspeaker can be sealed；
(8) panel is fixed on loudspeaker ontology, and is sealed.
By above method, available a kind of low frequency noise-proofing bone-conduction speaker, because the thickness of vibration-transmitting plate is only
For 0.08mm, vibration-transmitting plate is very thin, and lesser sound can vibrate.
Embodiment 2
As shown in Figure 1, the present embodiment noise-proofing bone-conduction speaker, including panel 8 and permanent magnet 4, it is equipped with below panel 8
Vibration-transmitting plate 1 is equipped with vibrating diaphragm 2 below vibration-transmitting plate 1, and vibration-transmitting plate 1 is fixed on biography vibration column 9, and vibrating diaphragm 2 is fixed on biography vibration column 9, passes vibration
Column 9 is fixed on panel 8, is loudspeaker ontology 3 below panel 8, is equipped with vibrationproof layer 14, vibrationproof layer 14 on the inside of loudspeaker ontology 3
It is equipped with shielded layer 15, loudspeaker ontology 3 is equipped with through-hole 11, electric wire 10 is equipped in through-hole 11, and electric wire 10 passes through through-hole 11
It is connect with coil 7, coil 7 is wrapped on balanced armature 5, and permanent magnet 4 is equipped in loudspeaker ontology 3, and balanced armature 5 passes through pivot
The middle part of 12 fixing permanent magnets 4, permanent magnet 4 are fixed on magnet bottom plate 6, and through-hole 11 is filled using glue 13.
The present embodiment noise-proofing bone-conduction speaker manufacturing method, includes the following steps:
(1) it selects vibration-transmitting plate and panel for 304 stainless steel material of SUS, vibration-transmitting plate is fabricated to the thickness of 0.2mm；
(2) vibration-transmitting plate and panel surface fire are baked into heat treatment, generates black oxidation skin, using nonhazardous with inorganic
The cleaning solution of additive is embathed, and the whitening processing purpose of stainless steel true qualities is reached；
(3) vibration-transmitting plate is fixed on biography vibration column, then fixed vibrating diaphragm, to passing on vibration column, then the fixed vibration column that passes is to panel
On；
(4) natural rubber will be installed on the inside of loudspeaker ontology, coats soft graphite on the surface of natural rubber, it is then solid
Determine in pivot and magnet bottom plate to loudspeaker ontology, on the groove of last fixing permanent magnet to magnet bottom plate；
(5) taking balanced armature length is 6mm, and coil is wound since from the 0.4mm of balanced armature top, and line footpath is
0.8mm, leading-in end of the end of inner most winding layer as coil, extraction of the end of outermost winding layer as coil
End, leading-in end are located at the right end of balanced armature, and winding layer number is 8 layers；
(6) balanced armature for winding coil is fixed on the pivot of loudspeaker body interior；
(7) it is connected using electric wire with coil, electric wire passes through the through-hole on loudspeaker ontology, fills in through-holes
Loctite3011, UV glue, UV is solidified to, energy 100mW/cm2, the time: 30S using ultraviolet light will play fixed electric wire
Effect, while loudspeaker can be sealed；
(8) panel is fixed on loudspeaker ontology, and is sealed.
By above method, a kind of available high-frequency noise-proofing bone-conduction speaker because vibration-transmitting plate with a thickness of
0.2mm, vibration-transmitting plate is thicker, and upper frequency can just make its vibration.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail a variety of equivalents can be carried out to technical solution of the present invention within the scope of the technical concept of the present invention, this
A little equivalents all belong to the scope of protection of the present invention.
Claims (1)
1. a kind of noise-proofing bone-conduction speaker manufacturing method, it is characterised in that: comprise the following specific steps that:
(1) it selects vibration-transmitting plate and panel for 304 stainless steel material of SUS, vibration-transmitting plate is fabricated to the thickness of 0.08-0.2mm；
(2) vibration-transmitting plate and panel surface fire are baked into heat treatment, generates black oxidation skin, have inorganic addition using nonhazardous
The cleaning solution of agent is embathed, and the whitening processing purpose of stainless steel true qualities is reached；
(3) vibration-transmitting plate is fixed on biography vibration column, then fixed vibrating diaphragm is to passing on vibration column, it is then fixed to pass on vibration column to panel；
(4) natural rubber will be installed on the inside of loudspeaker ontology, coats soft graphite on the surface of natural rubber, then fixes pivot
In axis and magnet bottom plate to loudspeaker ontology, on the groove of last fixing permanent magnet to magnet bottom plate；
(5) taking balanced armature length is 4-6mm, and coil is wound since from the 0.4mm of balanced armature top, line footpath 0.4-
0.8mm, leading-in end of the end of inner most winding layer as coil, extraction of the end of outermost winding layer as coil
End, leading-in end are located at the right end of balanced armature, and winding layer number is 4-8 layers；
(6) balanced armature for winding coil is fixed on the pivot of loudspeaker body interior；
(7) it being connected using electric wire with coil, electric wire passes through the through-hole on loudspeaker ontology, loctite3011 is filled in through-holes,
UV glue, UV is solidified to, energy 100mW/cm2, the time: 30S using ultraviolet light will play the role of fixed electric wire, while can
To seal loudspeaker；
(8) panel is fixed on loudspeaker ontology, and is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610644443.3A CN106210995B (en) | 2016-08-09 | 2016-08-09 | Noise-proofing bone-conduction speaker manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610644443.3A CN106210995B (en) | 2016-08-09 | 2016-08-09 | Noise-proofing bone-conduction speaker manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106210995A CN106210995A (en) | 2016-12-07 |
| CN106210995B true CN106210995B (en) | 2019-05-24 |
Family
ID=57513778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610644443.3A Active CN106210995B (en) | 2016-08-09 | 2016-08-09 | Noise-proofing bone-conduction speaker manufacturing method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1406449A (en) * | 2000-12-27 | 2003-03-26 | 株式会社坦姆科日本 | Bone conduction speaker |
| CN101940000A (en) * | 2008-02-08 | 2011-01-05 | 株式会社坦姆科日本 | Vibration pickup microphone |
| CN102301747A (en) * | 2008-09-22 | 2011-12-28 | 声束有限公司 | Balanced Armature Devices And Methods For Hearing |
| WO2013044548A1 (en) * | 2011-09-23 | 2013-04-04 | 苏州恒听电子有限公司 | Moving iron type microphone unit |
| CN103597803A (en) * | 2011-12-06 | 2014-02-19 | 株式会社坦姆科日本 | Mobile phone employing bone conduction device |
| CN204360945U (en) * | 2015-01-06 | 2015-05-27 | 深圳市韶音科技有限公司 | A kind of bone conduction earphone and press-key structure thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140185822A1 (en) * | 2012-12-28 | 2014-07-03 | Panasonic Corporation | Bone conduction speaker and bone conduction headphone device |
-
2016
- 2016-08-09 CN CN201610644443.3A patent/CN106210995B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1406449A (en) * | 2000-12-27 | 2003-03-26 | 株式会社坦姆科日本 | Bone conduction speaker |
| CN101940000A (en) * | 2008-02-08 | 2011-01-05 | 株式会社坦姆科日本 | Vibration pickup microphone |
| CN102301747A (en) * | 2008-09-22 | 2011-12-28 | 声束有限公司 | Balanced Armature Devices And Methods For Hearing |
| WO2013044548A1 (en) * | 2011-09-23 | 2013-04-04 | 苏州恒听电子有限公司 | Moving iron type microphone unit |
| CN103597803A (en) * | 2011-12-06 | 2014-02-19 | 株式会社坦姆科日本 | Mobile phone employing bone conduction device |
| CN204360945U (en) * | 2015-01-06 | 2015-05-27 | 深圳市韶音科技有限公司 | A kind of bone conduction earphone and press-key structure thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106210995A (en) | 2016-12-07 |
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Denomination of invention: Manufacturing method of anti-noise bone-conduction speaker Effective date of registration: 20200515 Granted publication date: 20190524 Pledgee: China Construction Bank Co.,Ltd. Suzhou High tech Industrial Development Zone Branch Pledgor: SUZHOU BEISHENG ACOUSTIC TECHNOLOGY Co.,Ltd. Registration number: Y2020320010033 |
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Date of cancellation: 20211110 Granted publication date: 20190524 Pledgee: China Construction Bank Co.,Ltd. Suzhou High tech Industrial Development Zone Branch Pledgor: SUZHOU BEISHENG ACOUSTIC TECHNOLOGY Co.,Ltd. Registration number: Y2020320010033 |
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Denomination of invention: Manufacturing method of noise proof bone conduction loudspeaker Effective date of registration: 20211126 Granted publication date: 20190524 Pledgee: China Construction Bank Co.,Ltd. Suzhou High tech Industrial Development Zone Branch Pledgor: SUZHOU BEISHENG ACOUSTIC TECHNOLOGY Co.,Ltd. Registration number: Y2021320010504 |
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Date of cancellation: 20231030 Granted publication date: 20190524 Pledgee: China Construction Bank Co.,Ltd. Suzhou High tech Industrial Development Zone Branch Pledgor: SUZHOU BEISHENG ACOUSTIC TECHNOLOGY Co.,Ltd. Registration number: Y2021320010504 |