CN111541098A - Fill electric pile waterproof plug - Google Patents
Fill electric pile waterproof plug Download PDFInfo
- Publication number
- CN111541098A CN111541098A CN202010384981.XA CN202010384981A CN111541098A CN 111541098 A CN111541098 A CN 111541098A CN 202010384981 A CN202010384981 A CN 202010384981A CN 111541098 A CN111541098 A CN 111541098A
- Authority
- CN
- China
- Prior art keywords
- plug
- shell
- movable
- sealing element
- waterproof
- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
- H01R13/5219—Sealing means between coupling parts, e.g. interfacial seal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
- B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a waterproof plug of a charging pile, which comprises a movable plug and a fixed plug, wherein the movable plug is connected with the charging pile, the fixed plug is connected with a vehicle, the charging pile supplies power to a storage battery of the vehicle after the movable plug is in butt joint with the fixed plug, the waterproof plug also comprises a first sealing element and a second sealing element, the first sealing element is connected with the movable plug, the second sealing element is connected with the fixed plug, and waterproof protection is formed after the first sealing element and the second sealing element are matched; this product is respectively to connecting the movable plug who fills electric pile to and the fixed plug who connects the vehicle reequips, makes movable plug and fixed plug in the butt joint, can form effectual waterproof in the outside of butt joint position department, even intake also can be avoided to heavy rain.
Description
Technical Field
The invention relates to a waterproof plug of a charging pile.
Background
The charging pile has the function similar to an oiling machine in a gas station, can be fixed on the ground or on the wall, is installed in public buildings (public buildings, markets, public parking lots and the like) and residential district parking lots or charging stations, and can charge various types of electric vehicles according to different voltage grades. The input end of the charging pile is directly connected with an alternating current power grid, and the output end of the charging pile is provided with a charging plug for charging the electric automobile. Fill electric pile and generally provide two kinds of charging methods of conventional charging and quick charge, people can use specific charging card to swipe the card and use on the human-computer interaction operation interface that fills electric pile and provide, carry out operations such as corresponding charging method, charging time, expense data printing, fill electric pile display screen and can show data such as the charge volume, expense, charging time.
Fill electric pile when using, the butt joint position department of its plug and vehicle takes place into water easily, and the water intaking can lead to the short circuit.
Based on the above problems, we have designed a charging pile waterproof plug that can upgrade the existing plug and achieve a higher waterproof effect.
Disclosure of Invention
The invention aims to solve the technical problem of providing a waterproof plug of a charging pile, which can upgrade the existing plug and achieve a higher waterproof effect.
The invention is realized by the following technical scheme:
a waterproof plug of a charging pile comprises a movable plug and a fixed plug, wherein the movable plug is connected with the charging pile, the fixed plug is connected with a vehicle, the charging pile supplies power to a storage battery of the vehicle after the movable plug is in butt joint with the fixed plug, the waterproof plug also comprises a first sealing piece and a second sealing piece, the first sealing piece is connected with the movable plug, the second sealing piece is connected with the fixed plug, and waterproof protection is formed after the first sealing piece and the second sealing piece are matched;
the first sealing element comprises a shell, wherein a small pipe part is arranged at the left end of the shell, an annular clamping groove is arranged on the inner wall of the small pipe part, a rubber sealing strip is assembled in the clamping groove, the sealing strip is annular, the thickness of the sealing strip is gradually reduced towards the direction of the circle center, an annular connecting ring is arranged at the position of the inner end face of the shell, a rubber movable sleeve is arranged in the shell, a clamping ring is formed at the outer wall of the movable sleeve in an injection molding mode, a first clamping ring is formed at the position of the right end of the shell in an injection molding mode, a limiting position is formed between the clamping ring and the first clamping ring, a spring is sleeved at the outer wall of the movable sleeve and acts between the clamping ring and the inner end face of the shell; the movable plug is inserted into the shell after passing through the small pipe part;
the second sealing element comprises a first shell connected with the vehicle body, the left side of the first shell is provided with an opening, a water retaining ring is arranged inside the first shell and is positioned on the right side of the opening, and the fixed plug is inserted through the right side of the first shell;
the first shell is matched in the movable sleeve and forms sealing after being contacted with the movable sleeve;
the movable plug is inserted into the first shell and then is butted with the fixed plug, when the movable plug is pulled out to the left side, the movable plug slides to the left side along the small pipe part, and meanwhile, the movable sleeve is ejected to the right side, so that the movable plug is always protected on the inner side of the movable sleeve.
Preferably, a guide screw is screwed into the outer wall of the connecting ring, and a guide sliding groove is processed on the outer wall of the movable plug; the effect of above-mentioned structure is the distance that can slide of restriction activity plug, avoids causing the separation between activity plug and the casing when plug activity plug.
Preferably, an annular buckle strip is arranged at the inner right end of the movable sleeve, and a buckle groove matched with the buckle strip is arranged at the outer wall of the first shell.
Preferably, a ball head is processed at the end of the guide screw inserted into the guide chute; the friction resistance between the guide screw and the guide sliding groove can be reduced by the arrangement of the ball head.
The invention has the beneficial effects that: this product is respectively to connecting the movable plug that fills electric pile to and the fixed plug of connecting the vehicle reequips, makes movable plug and fixed plug in the butt joint, can form effectual waterproof in the outside of butt joint position department, even also can avoid intaking in heavy rain, makes to charge safelyr. The structure of this product is comparatively simple, and the cost is comparatively cheap, is fit for using widely.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of the mating of the first and second seals.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "sleeved," "connected," "penetrating," "plugged," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1 and 2, the waterproof plug for the charging pile comprises a movable plug 1 connected with the charging pile, a fixed plug 2 connected with a vehicle, a first sealing element 3 connected with the movable plug 1, and a second sealing element 4 connected with the fixed plug 2, wherein the movable plug 1 is in butt joint with the fixed plug 2, and the charging pile supplies power to a storage battery of the vehicle;
the first sealing element 3 comprises a shell 301, a small pipe part 302 is arranged at the left end of the shell 301, an annular clamping groove 303 is arranged at the inner wall of the small pipe part 302, a rubber sealing strip 304 is assembled in the clamping groove 303, the sealing strip 304 is annular, the thickness of the sealing strip 304 is gradually reduced towards the circle center, an annular connecting ring 305 is arranged at the inner end face of the shell 301, a rubber movable sleeve 306 is arranged in the shell 301, a clamping ring 307 is formed at the outer wall of the movable sleeve 306 in an injection molding mode, a first clamping ring 308 is formed at the right end face of the shell 301 in an injection molding mode, a limiting position is formed between the clamping ring 307 and the first clamping ring 308, a spring 309 is sleeved at the outer wall of the movable sleeve 306, and the spring 309 acts between the clamping ring 307 and the inner end face of the shell 301; the movable plug 1 is inserted into the shell 301 through the small pipe part 302;
the second sealing member 4 comprises a first shell 401 connected with the vehicle body, the left side of the first shell 401 is provided with an opening 402, the inside of the first shell 401 is provided with a water retaining ring 403, the water retaining ring 403 is positioned at the right side of the opening 402, and the fixed plug 2 is inserted through the right side of the first shell 401;
the first shell 401 is fitted in the movable sleeve 306 and forms a seal after being contacted with the movable sleeve 306;
the movable plug 1 is inserted into the first housing 401 and then abuts against the fixed plug 2, when the movable plug 1 is pulled out to the left, the movable plug 1 slides to the left along the small pipe part 302, and simultaneously the movable sleeve 306 springs to the right, so that the movable plug 1 is always protected inside the movable sleeve 306.
In a preferred embodiment of the present invention, a guiding screw 331 is screwed into an outer wall of the connecting ring 305, and a guiding chute 121 is formed in an outer wall of the movable plug 1; the effect of above-mentioned structure is the distance that can slide of restriction activity plug, avoids causing the separation between activity plug and the casing when plug activity plug.
In a preferred embodiment of the present invention, a ring-shaped buckle bar 333 is disposed at the inner right end of the movable sleeve 306, and a buckle groove 444 that fits the buckle bar 333 is disposed at the outer wall of the first housing 401.
In a preferred embodiment of the present invention, a ball 332 is formed at the end of the guiding screw 331 inserted into the guiding chute; the friction resistance between the guide screw and the guide sliding groove can be reduced by the arrangement of the ball head.
The invention has the beneficial effects that: this product is respectively to connecting the movable plug that fills electric pile to and the fixed plug of connecting the vehicle reequips, makes movable plug and fixed plug in the butt joint, can form effectual waterproof in the outside of butt joint position department, even also can avoid intaking in heavy rain, makes to charge safelyr. The structure of this product is comparatively simple, and the cost is comparatively cheap, is fit for using widely.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (4)
1. The utility model provides a fill electric pile waterproof plug, includes that a connection fills the movable plug of electric pile to and the fixed plug of connecting the vehicle, movable plug and fixed plug dock the back, fill the battery power supply of electric pile for the vehicle, its characterized in that: the waterproof plug also comprises a first sealing element connected with the movable plug and a second sealing element connected with the fixed plug, and the first sealing element and the second sealing element are matched to form waterproof protection;
the first sealing element comprises a shell, wherein a small pipe part is arranged at the left end of the shell, an annular clamping groove is arranged on the inner wall of the small pipe part, a rubber sealing strip is assembled in the clamping groove, the sealing strip is annular, the thickness of the sealing strip is gradually reduced towards the direction of the circle center, an annular connecting ring is arranged at the position of the inner end face of the shell, a rubber movable sleeve is arranged in the shell, a clamping ring is formed at the outer wall of the movable sleeve in an injection molding mode, a first clamping ring is formed at the position of the right end of the shell in an injection molding mode, a limiting position is formed between the clamping ring and the first clamping ring, a spring is sleeved at the outer wall of the movable sleeve and acts between the clamping ring and the inner end face of the shell; the movable plug is inserted into the shell after passing through the small pipe part;
the second sealing element comprises a first shell connected with the vehicle body, the left side of the first shell is provided with an opening, a water retaining ring is arranged inside the first shell and is positioned on the right side of the opening, and the fixed plug is inserted through the right side of the first shell;
the first shell is matched in the movable sleeve and forms sealing after being contacted with the movable sleeve;
the movable plug is inserted into the first shell and then is butted with the fixed plug, when the movable plug is pulled out to the left side, the movable plug slides to the left side along the small pipe part, and meanwhile, the movable sleeve is ejected to the right side, so that the movable plug is always protected on the inner side of the movable sleeve.
2. The waterproof plug of electric pile of filling of claim 1, characterized in that: the outer wall of the connecting ring is screwed with a guide screw, and a guide sliding groove is processed at the outer wall of the movable plug.
3. The waterproof plug of electric pile of filling of claim 1, characterized in that: an annular buckling strip is arranged at the inner right end of the movable sleeve, and a buckling groove matched with the buckling strip is arranged at the outer wall of the first shell.
4. The waterproof plug of electric pile that fills of claim 2, characterized in that: and a ball head is processed at the end of the guide screw inserted into the guide sliding groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010384981.XA CN111541098B (en) | 2020-05-09 | 2020-05-09 | Fill electric pile waterproof plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010384981.XA CN111541098B (en) | 2020-05-09 | 2020-05-09 | Fill electric pile waterproof plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111541098A true CN111541098A (en) | 2020-08-14 |
| CN111541098B CN111541098B (en) | 2021-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010384981.XA Active CN111541098B (en) | 2020-05-09 | 2020-05-09 | Fill electric pile waterproof plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111541098B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112092662A (en) * | 2020-10-10 | 2020-12-18 | 许旦军 | New energy automobile fills electric pile plug fixing device |
| CN112622662A (en) * | 2020-12-09 | 2021-04-09 | 南京深骐电子科技有限公司 | Waterproof and dustproof wall-mounted charging pile |
| CN113291179A (en) * | 2021-05-31 | 2021-08-24 | 山西交通技师学院 | New forms of energy electric automobile direct current fills electric pile |
| CN114069798A (en) * | 2021-11-29 | 2022-02-18 | 宁波三星智能电气有限公司 | Waterproof charging equipment and control method |
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| CN109038066A (en) * | 2018-07-24 | 2018-12-18 | 芜湖彰鸿工程技术有限公司 | A kind of charging pile for electric vehicle plug assembly |
| CN209747788U (en) * | 2019-06-03 | 2019-12-06 | 漳州龙文维克信息技术有限公司 | Plug of heavy-load connector |
| CN209833382U (en) * | 2019-03-29 | 2019-12-24 | 桂林电子科技大学 | Fill electric pile watertight fittings |
| US20200031235A1 (en) * | 2018-07-26 | 2020-01-30 | Ford Global Technologies, Llc | Charge port covering assembly and method |
| CN210007004U (en) * | 2019-05-16 | 2020-01-31 | 深圳市晨洋通信产品有限公司 | photoelectric comprehensive watertight connector |
| CN210007003U (en) * | 2019-04-28 | 2020-01-31 | 共同科技开发有限公司 | Socket protection device of kinds of automobile charging piles |
| CN210000157U (en) * | 2019-03-26 | 2020-01-31 | 中航光电科技股份有限公司 | Charging gun rainproof cover |
| CN210379615U (en) * | 2019-09-05 | 2020-04-21 | 重庆安全技术职业学院 | Computer interface device |
-
2020
- 2020-05-09 CN CN202010384981.XA patent/CN111541098B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109038066A (en) * | 2018-07-24 | 2018-12-18 | 芜湖彰鸿工程技术有限公司 | A kind of charging pile for electric vehicle plug assembly |
| US20200031235A1 (en) * | 2018-07-26 | 2020-01-30 | Ford Global Technologies, Llc | Charge port covering assembly and method |
| CN210000157U (en) * | 2019-03-26 | 2020-01-31 | 中航光电科技股份有限公司 | Charging gun rainproof cover |
| CN209833382U (en) * | 2019-03-29 | 2019-12-24 | 桂林电子科技大学 | Fill electric pile watertight fittings |
| CN210007003U (en) * | 2019-04-28 | 2020-01-31 | 共同科技开发有限公司 | Socket protection device of kinds of automobile charging piles |
| CN210007004U (en) * | 2019-05-16 | 2020-01-31 | 深圳市晨洋通信产品有限公司 | photoelectric comprehensive watertight connector |
| CN209747788U (en) * | 2019-06-03 | 2019-12-06 | 漳州龙文维克信息技术有限公司 | Plug of heavy-load connector |
| CN210379615U (en) * | 2019-09-05 | 2020-04-21 | 重庆安全技术职业学院 | Computer interface device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112092662A (en) * | 2020-10-10 | 2020-12-18 | 许旦军 | New energy automobile fills electric pile plug fixing device |
| CN112092662B (en) * | 2020-10-10 | 2021-05-11 | 滕州潍达智能科技有限公司 | New energy automobile fills electric pile plug fixing device |
| CN112622662A (en) * | 2020-12-09 | 2021-04-09 | 南京深骐电子科技有限公司 | Waterproof and dustproof wall-mounted charging pile |
| CN112622662B (en) * | 2020-12-09 | 2023-11-10 | 南京深骐电子科技有限公司 | Waterproof dustproof wall-mounted charging pile |
| CN113291179A (en) * | 2021-05-31 | 2021-08-24 | 山西交通技师学院 | New forms of energy electric automobile direct current fills electric pile |
| CN113291179B (en) * | 2021-05-31 | 2023-01-10 | 山西交通技师学院 | New forms of energy electric automobile direct current fills electric pile |
| CN114069798A (en) * | 2021-11-29 | 2022-02-18 | 宁波三星智能电气有限公司 | Waterproof charging equipment and control method |
| CN114069798B (en) * | 2021-11-29 | 2023-10-13 | 宁波三星智能电气有限公司 | Waterproof charging equipment and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111541098B (en) | 2021-06-22 |
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Effective date of registration: 20210602 Address after: 113 Chaoyang Road, Fuying street, Xianju County, Taizhou City, Zhejiang Province Applicant after: Langda network technology (Zhejiang) Co.,Ltd. Address before: 343200 No.34 pailingxia, Chetian village, Fengtian Town, Anfu county, Ji'an City, Jiangxi Province Applicant before: Liu Weiying |
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Effective date of registration: 20221207 Address after: 314100 North of the 1st floor of Building 1, No. 1, Weizhong Road, Weitang Street, Jiashan County, Jiaxing City, Zhejiang Province Patentee after: Woyijie (Zhejiang) Electronic Technology Co.,Ltd. Address before: 113 Chaoyang Road, Fuying street, Xianju County, Taizhou City, Zhejiang Province Patentee before: Langda network technology (Zhejiang) Co.,Ltd. |