CN111918198B - Vibrating diaphragm forming process - Google Patents
Vibrating diaphragm forming process Download PDFInfo
- Publication number
- CN111918198B CN111918198B CN202010639068.XA CN202010639068A CN111918198B CN 111918198 B CN111918198 B CN 111918198B CN 202010639068 A CN202010639068 A CN 202010639068A CN 111918198 B CN111918198 B CN 111918198B
- Authority
- CN
- China
- Prior art keywords
- annular groove
- forming
- diaphragm
- film
- molding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000000465 moulding Methods 0.000 claims abstract description 53
- 239000011265 semifinished product Substances 0.000 claims abstract description 17
- 238000000748 compression moulding Methods 0.000 claims description 10
- 238000004880 explosion Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 abstract 2
- 238000007493 shaping process Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- 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
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms And Bellows (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The invention provides a vibrating diaphragm forming process, which comprises the following steps: carrying out primary molding on the film, and forming a first annular groove with a folding ring imitating structure on the film to obtain a semi-finished vibrating diaphragm; and carrying out secondary molding on the support ring and the semi-finished product of the vibrating diaphragm, molding and fixing the periphery of the support ring and the periphery of the first annular groove together, and molding the first annular groove into a folded ring, thereby obtaining the vibrating diaphragm. The vibrating diaphragm forming process includes forming the first annular groove in the structure of the folding ring on the vibrating diaphragm, forming and fixing the support ring and the first annular groove together, and forming the first annular groove into the folding ring. Compare with traditional vibrating diaphragm one shot forming technology, this kind of vibrating diaphragm forming technology is through the first annular groove of imitative book ring structure of shaping play earlier to can reserve the vibrating diaphragm material of sufficient book ring part, thereby improved greatly because the book ring size uniformity that one shot forming brought is poor, vibrating diaphragm structure and design nonconformity scheduling problem.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of sound production devices, in particular to a vibrating diaphragm forming process.
[ background of the invention ]
The diaphragm is an important component of the micro-speaker, and the diaphragm plays an important role in the sound reproduction performance of the micro-speaker, and determines the quality of the electric-to-acoustic conversion of the speaker.
The traditional diaphragm forming process is that the diaphragm and the steel ring are formed once to obtain the diaphragm through processes such as gas explosion integrated forming and compression molding, the steel ring is glued with the boundary of the diaphragm as a structural part, the diaphragm comprises a ball top and a folding ring surrounding the ball top, and the steel ring, the folding ring and the ball top are sequentially arranged from outside to inside.
However, since the edge is a curved surface, the diaphragm obtained by the conventional one-step forming process often has poor consistency of the edge dimensions (inner and outer diameters of the edge, height of the edge, thickness of the film, etc.), and the structure of the diaphragm is not in accordance with the design, which results in unstable performance of the diaphragm and low yield.
[ summary of the invention ]
Accordingly, there is a need for a diaphragm forming process with high yield.
A diaphragm forming process comprises the following steps:
carrying out primary molding on the film, and forming a first annular groove with a folding ring imitating structure on the film to obtain a semi-finished vibrating diaphragm; and
and carrying out secondary molding on the support ring and the semi-finished product of the vibrating diaphragm, molding and fixing the periphery of the support ring and the periphery of the first annular groove together, and molding the first annular groove into a folded ring, thereby obtaining the vibrating diaphragm.
A diaphragm forming process comprises the following steps:
carrying out primary molding on the film, and forming a first annular groove of a folding ring imitating structure on the film to obtain a first vibrating diaphragm semi-finished product;
carrying out secondary molding on the support ring and the first diaphragm semi-finished product, and molding and fixing the top surface of the support ring and the periphery of the first annular groove together to obtain a second diaphragm semi-finished product; and
and forming the second diaphragm semi-finished product for the third time, forming and fixing the outer side surface of the support ring and the periphery of the first annular groove together, and forming patterns on the first annular groove, so that the first annular groove is formed into a folded ring, and the diaphragm is obtained.
The vibrating diaphragm forming process includes forming the first annular groove in the structure of the folding ring on the vibrating diaphragm, forming and fixing the support ring and the first annular groove together, and forming the first annular groove into the folding ring. Compared with the traditional diaphragm one-time forming process, the diaphragm forming process has the advantages that the first annular groove of the imitated corrugated rim structure is formed in advance, so that enough diaphragm materials of the corrugated rim part can be reserved, and the problems that the corrugated rim size (the inner diameter and the outer diameter of the corrugated rim, the corrugated rim height, the thickness of the diaphragm and the like) is poor in consistency, the diaphragm structure is inconsistent with the design and the like due to one-time forming are greatly solved.
The folding ring of the diaphragm manufactured by the diaphragm forming process has reduced internal stress and deformation, the consistency of the inner diameter and the outer diameter of the folding ring, the height of the folding ring and the thickness is obviously improved, and the performance of the diaphragm is stable, so that the yield of diaphragm forming is improved.
[ description of the drawings ]
Fig. 1 is a flowchart of a diaphragm molding process according to an embodiment.
Fig. 2 is a schematic diagram of a diaphragm forming process shown in fig. 1.
Fig. 3 is a flowchart of a diaphragm molding process according to another embodiment.
Fig. 4 is a schematic diagram of a diaphragm forming process shown in fig. 3.
[ detailed description ] embodiments
The invention is further described with reference to the following figures and embodiments.
The diaphragm forming process of one embodiment shown in fig. 1 and fig. 2 includes the following steps:
s110, performing primary molding on the film 110, and forming a first annular groove 112 with a zigzag ring structure on the film 110 to obtain a diaphragm semi-finished product 130.
Referring to fig. 2, specifically, the first molding operation of the film 110 includes: providing a film stretching plate 120 provided with a cavity 122, laying the film 110 on the film stretching plate 120, and then carrying out primary molding on the film 110 so that the first annular groove 112 is formed in the area of the film 110 in the cavity 122.
Preferably, the first molding can be gas explosion integral molding, compression molding or other molding processes.
With reference to the drawings, in this embodiment, S110 further includes: a second annular groove 114 is formed in the membrane 110 surrounding the first annular groove 112.
Referring to the figures, in the diaphragm 150, the support ring 140 is fixed with the second annular groove 114.
By reserving enough film material in the area of the film 110 in the cavity 122, a series of problems such as boundary, thickness and the like caused by stretching of the film 110 can be avoided in the subsequent forming process of the support ring 140.
And S120, performing secondary molding on the support ring 140 and the diaphragm semi-finished product 130, molding and fixing the support ring 140 and the periphery of the first annular groove 112 together, and molding the first annular groove 112 into a folded ring 152, thereby obtaining the diaphragm 150.
With reference to fig. 2, in the present embodiment, the periphery of the first annular groove 112 includes a second annular groove 114 and a region enclosed between the first annular groove 112 and the second annular groove 114. In other embodiments, the second annular groove 114 may not be present.
Referring to fig. 2, in the present embodiment, the operations of forming and fixing the support ring 140 and the outer periphery of the first annular groove 112 are as follows: the top and outer sides 142, 144 of the support ring 140 are formed and secured to the periphery of the first annular groove 112, while forming a pattern 154 in the first annular groove 112.
Specifically, the top surface 142 of the support ring 140 is secured to the area enclosed between the first annular groove 112 and the second annular groove 114, and the outer side surface 144 of the support ring 140 is secured to the second annular groove 114.
Preferably, the support ring 140 is glued to the periphery of the first annular groove 112.
Preferably, the second molding process may be gas explosion integral molding, compression molding or other molding processes.
Generally, the material of the film 110 may be PEEK, TPU, or other polymer composite film material.
The support ring 140 may be a steel ring or a ring made of other materials, as long as the support function of the support ring 140 can be achieved, and the support ring 140 can be glued and fixed to the periphery of the first annular groove 112 with a suitable glue.
In the diaphragm forming process, a first annular groove 112 with a zigzag ring structure is formed on the film 110, and then the support ring 140 and the periphery of the first annular groove 112 are formed and fixed together, and the first annular groove 112 is formed into a zigzag ring 152. Compared with the traditional diaphragm one-time forming process, the diaphragm forming process has the advantages that the first annular groove 112 imitating the corrugated rim structure is formed in advance, so that enough diaphragm materials of the corrugated rim part can be reserved, and the problems that the corrugated rim size (the inner diameter and the outer diameter of the corrugated rim, the corrugated rim height, the thickness of the diaphragm and the like) is poor in consistency, the diaphragm structure is not matched with the design and the like caused by one-time forming are greatly solved.
The folding rings 152 of the diaphragm 150 manufactured by the diaphragm molding process have reduced internal stress and deformation, the consistency of the inner and outer diameters of the folding rings 152, the height of the folding rings 152 and the thickness is obviously improved, and the performance of the diaphragm 150 is stable, so that the molding yield of the diaphragm 150 is improved.
Another embodiment of the diaphragm forming process shown in fig. 3 and 4 includes the following steps:
s210, performing primary molding on the film 210, and forming a first annular groove 212 with a zigzag ring structure on the film 210 to obtain a diaphragm semi-finished product 230.
Referring to fig. 2, in detail, the first molding operation of the film 210 is as follows: providing a film stretching plate 220 provided with a cavity 222, laying the film 210 on the film stretching plate 220, and then carrying out primary molding on the film 210 so that the first annular groove 212 is formed in the area of the film 210 in the cavity 222.
Preferably, the first molding can be gas explosion integral molding, compression molding or other molding processes.
With reference to the drawings, in this embodiment, S210 further includes: a second annular groove 214 is formed on the film 210 surrounding the first annular groove 212.
Referring to the figures, in the diaphragm 260, the support ring 240 is fixed with the second annular groove 214.
By reserving enough film material in the area of the film 210 in the cavity 222, a series of problems such as boundary, thickness and the like caused by stretching of the film 210 can be avoided in the subsequent forming process of the support ring 240.
And S220, carrying out secondary molding on the support ring 240 and the diaphragm semi-finished product 230, and molding and fixing the top surface 242 of the support ring 240 and the periphery of the first annular groove 212 together to obtain a second diaphragm semi-finished product 250.
Referring to fig. 4, in the present embodiment, the outer periphery of the first annular groove 212 includes the second annular groove 214 and the region enclosed between the first annular groove 212 and the second annular groove 214. In other embodiments, the second annular groove 214 may not be present.
Specifically, the top surface 242 of the support ring 240 is secured to the area enclosed between the first and second annular grooves 212, 214.
Preferably, the top surface 242 of the support ring 240 is glued to the area enclosed between the first annular groove 212 and the second annular groove 214.
Preferably, the second molding process may be gas explosion integral molding, compression molding or other molding processes.
And S230, carrying out third molding on the second diaphragm semi-finished product 250, molding and fixing the outer side surface 244 of the support ring 240 and the periphery of the first annular groove 212 together, and forming a pattern 264 on the first annular groove 212, so that the first annular groove 212 is molded into a folded ring 262, thereby obtaining the diaphragm 260.
Specifically, the outer side 244 of the support ring 240 is secured with the second annular groove 214.
Preferably, the outer side 244 of the support ring 240 is adhesively secured with the second annular groove 214.
In general, the material of the film 210 may be PEEK, TPU, or other polymer composite film material.
The support ring 240 may be a steel ring or a ring made of other materials, as long as the support function of the support ring 240 can be achieved, and the support ring 240 can be glued and fixed to the periphery of the first annular groove 212 by using a suitable glue.
In the diaphragm forming process, a first annular groove 212 with a zigzag ring structure is formed on the film 210, and then the support ring 240 and the periphery of the first annular groove 212 are formed and fixed together, and the first annular groove 212 is formed into a zigzag ring 262. Compared with the traditional diaphragm one-time forming process, the diaphragm forming process has the advantages that the first annular groove 212 of the folding ring imitating structure is formed in advance, so that enough diaphragm materials of the folding ring part can be reserved, and the problems that the size of the folding ring (the inner diameter and the outer diameter of the folding ring, the height of the folding ring, the thickness of the film and the like) is poor, the diaphragm structure is not consistent with the design and the like caused by one-time forming are greatly solved.
The folded ring 262 internal stress and deformation of the diaphragm 260 manufactured by the diaphragm molding process are reduced, the consistency of the inner diameter and the outer diameter of the folded ring 262, the height of the folded ring 262 and the thickness is obviously improved, the performance of the diaphragm 260 is stable, and therefore the yield of the diaphragm 260 molding is improved.
More preferably, for a film material with a smaller modulus, the elasticity is large, and the size variation is more obvious, and the step S220 added in the diaphragm forming process is to further compensate for the film material within the boundary of the support ring 240, so that the size variation of the finally formed diaphragm 260 is smaller, the flatness and the size consistency are further improved, and the stability of the diaphragm 260 is further improved.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (6)
1. A diaphragm forming process is characterized by comprising the following steps:
carrying out primary molding on the film, and forming a first annular groove with a folding ring imitating structure on the film to obtain a semi-finished vibrating diaphragm; and
carrying out secondary molding on a support ring and the semi-finished product of the vibrating diaphragm, molding and fixing the support ring and the periphery of the first annular groove together, and molding the first annular groove into a folded ring, thereby obtaining the vibrating diaphragm;
the operation of performing the first molding on the film further includes: forming a second annular groove on the film surrounding the first annular groove;
the periphery of the first annular groove comprises the second annular groove and an area enclosed between the first annular groove and the second annular groove;
in the diaphragm, the top surface of the support ring is fixed with an area defined between the first annular groove and the second annular groove, and the outer side surface of the support ring is fixed with the second annular groove.
2. The diaphragm forming process of claim 1, wherein the first forming operation on the film is: providing a film stretching plate with a cavity, laying the film on the film stretching plate, and then carrying out the first forming on the film, so that the first annular groove and the second annular groove are formed in the area, located in the cavity, of the film.
3. The diaphragm forming process of claim 2, wherein the first forming is gas explosion integral forming or compression molding;
the support ring is glued and fixed with the periphery of the first annular groove, and the secondary molding is gas explosion integral molding or compression molding.
4. A diaphragm forming process is characterized by comprising the following steps:
carrying out primary molding on the film, and forming a first annular groove of a folding ring imitating structure on the film to obtain a first vibrating diaphragm semi-finished product;
carrying out secondary molding on the support ring and the first diaphragm semi-finished product, and molding and fixing the top surface of the support ring and the periphery of the first annular groove together to obtain a second diaphragm semi-finished product; and
forming the second diaphragm semi-finished product for the third time, forming and fixing the outer side surface of the support ring and the periphery of the first annular groove together, and forming patterns on the first annular groove, so that the first annular groove is formed into a folded ring, and the diaphragm is obtained;
the operation of performing the first molding on the film further includes: forming a second annular groove on the film surrounding the first annular groove;
the periphery of the first annular groove comprises the second annular groove and an area enclosed between the first annular groove and the second annular groove;
in the diaphragm, the top surface of the support ring is fixed with an area defined between the first annular groove and the second annular groove, and the outer side surface of the support ring is fixed with the second annular groove.
5. The diaphragm forming process of claim 4, wherein the first forming operation on the film is: providing a film stretching plate with a cavity, laying the film on the film stretching plate, and then carrying out the first forming on the film, so that the first annular groove and the second annular groove are formed in the area, located in the cavity, of the film.
6. The diaphragm forming process of claim 5, wherein the first forming is gas explosion integral forming or compression molding;
the support ring is glued and fixed with the periphery of the first annular groove, the second forming is gas explosion integral forming or compression molding, and the third forming is gas explosion integral forming or compression molding.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010639068.XA CN111918198B (en) | 2020-07-06 | 2020-07-06 | Vibrating diaphragm forming process |
| PCT/CN2020/103767 WO2022007001A1 (en) | 2020-07-06 | 2020-07-23 | Diaphragm forming process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010639068.XA CN111918198B (en) | 2020-07-06 | 2020-07-06 | Vibrating diaphragm forming process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111918198A CN111918198A (en) | 2020-11-10 |
| CN111918198B true CN111918198B (en) | 2022-03-01 |
Family
ID=73228043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010639068.XA Active CN111918198B (en) | 2020-07-06 | 2020-07-06 | Vibrating diaphragm forming process |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111918198B (en) |
| WO (1) | WO2022007001A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0508150A2 (en) * | 1991-04-11 | 1992-10-14 | Nokia (Deutschland) GmbH | Loudspeaker with an element joining the suspension and the (built-in) seal |
| CN207269266U (en) * | 2017-10-23 | 2018-04-24 | 密斯工业(深圳)有限公司 | A kind of composite diaphragm system |
| CN109587604A (en) * | 2018-11-08 | 2019-04-05 | 瑞声科技(新加坡)有限公司 | Loudspeaker and its assemble method |
| CN209201333U (en) * | 2018-12-12 | 2019-08-02 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
| CN210168218U (en) * | 2019-06-28 | 2020-03-20 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201629838U (en) * | 2009-12-21 | 2010-11-10 | 深圳市美欧电子有限责任公司 | Double folding ring electromagnetic loudspeaker |
| CN106911988B (en) * | 2017-03-31 | 2023-09-29 | 歌尔股份有限公司 | Vibrating diaphragm, loudspeaker and assembling method thereof |
| CN207053758U (en) * | 2017-06-23 | 2018-02-27 | 歌尔科技有限公司 | A kind of loudspeaker monomer of speaker vibration system and the application vibrational system |
| CN109511079A (en) * | 2018-12-07 | 2019-03-22 | 歌尔股份有限公司 | Sounding device, for sounding device vibrating diaphragm component processing method |
| CN109819389B (en) * | 2018-12-28 | 2021-05-14 | 瑞声精密制造科技(常州)有限公司 | Vibrating diaphragm forming die |
-
2020
- 2020-07-06 CN CN202010639068.XA patent/CN111918198B/en active Active
- 2020-07-23 WO PCT/CN2020/103767 patent/WO2022007001A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0508150A2 (en) * | 1991-04-11 | 1992-10-14 | Nokia (Deutschland) GmbH | Loudspeaker with an element joining the suspension and the (built-in) seal |
| CN207269266U (en) * | 2017-10-23 | 2018-04-24 | 密斯工业(深圳)有限公司 | A kind of composite diaphragm system |
| CN109587604A (en) * | 2018-11-08 | 2019-04-05 | 瑞声科技(新加坡)有限公司 | Loudspeaker and its assemble method |
| CN209201333U (en) * | 2018-12-12 | 2019-08-02 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
| CN210168218U (en) * | 2019-06-28 | 2020-03-20 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111918198A (en) | 2020-11-10 |
| WO2022007001A1 (en) | 2022-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6757404B2 (en) | Loud speaker, diaphragm and process for making the diaphragm | |
| CN103052017B (en) | Microphone device and manufacture method thereof | |
| CN109819389B (en) | Vibrating diaphragm forming die | |
| US20080277197A1 (en) | Diaphragm structure for micro-electroacoustic device | |
| CN109803219B (en) | Vibrating diaphragm forming die | |
| CN104469628A (en) | Slim type speaker and method for manufacturing thereof | |
| CN111918198B (en) | Vibrating diaphragm forming process | |
| CN101682816A (en) | Electro-acoustic sound transducer, receiver and microphone | |
| TW202021381A (en) | Speaker vibration plate | |
| US1844487A (en) | Diaphragm | |
| CN211720737U (en) | Loudspeaker vibrating piece | |
| JP2013236371A (en) | Diaphragm for speaker integrally formed with different degrees of rigidity in one polymeric film | |
| CN106851518B (en) | Method for manufacturing vibrating diaphragm | |
| CN112689229B (en) | Silicon-based microphone and manufacturing method thereof | |
| CN109413561B (en) | Processing method of sound production device shell, sound production device shell and module | |
| CN220359369U (en) | Vibrating diaphragm forming die | |
| WO2021114152A1 (en) | Loudspeaker vibrating member | |
| GB2074812A (en) | A method of manufacturing a speaker diaphragm | |
| CN218162837U (en) | Novel combined type sound membrane | |
| JPS6050120B2 (en) | Manufacturing method of speaker diaphragm | |
| JP2001189991A (en) | Manufacturing method for conductive damper for speaker and its device | |
| CN108810763A (en) | Pistonic loudspeaker | |
| JP2002543702A (en) | Loudspeaker | |
| JPS5837187Y2 (en) | Diaphragm devices in electroacoustic transducers | |
| JPS5843699A (en) | Diaphragm for loudspeaker and its manufacture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231020 Address after: 213000 No. 801, Changwu Road, Wujin District, Changzhou City, Jiangsu Province (Yuanyu science and technology building, Changzhou science and Education City) Patentee after: Science and Education City branch of Ruisheng new energy development (Changzhou) Co.,Ltd. Patentee after: Jiangsu Jicui Zhongyi Technology Industry Development Co.,Ltd. Address before: No. 801, Changwu Road, Wujin District, Changzhou City, Jiangsu Province Patentee before: Science and Education City branch of Ruisheng new energy development (Changzhou) Co.,Ltd. |
|
| TR01 | Transfer of patent right |