CN104577432A - Socket protecting gate reset by compressed spring - Google Patents
Socket protecting gate reset by compressed spring Download PDFInfo
- Publication number
- CN104577432A CN104577432A CN201410769549.7A CN201410769549A CN104577432A CN 104577432 A CN104577432 A CN 104577432A CN 201410769549 A CN201410769549 A CN 201410769549A CN 104577432 A CN104577432 A CN 104577432A
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- CN
- China
- Prior art keywords
- shutter
- stage clip
- jacks
- block
- jack
- 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
- H01R13/44—Means for preventing access to live contacts
- H01R13/447—Shutter or cover plate
- H01R13/453—Shutter or cover plate opened by engagement of counterpart
Landscapes
- Connector Housings Or Holding Contact Members (AREA)
Abstract
The invention relates to a socket protecting gate, in particular to a socket protecting gate reset by a compressed spring. The socket protecting gate comprises a casing and a protecting gate unit, wherein a plurality of jacks are formed in the casing, the protecting gate unit comprises a protecting gate, the compressed spring, a first stop dog and a second stop dog, the protecting gate is provided with a first driving slope and a second driving slope which are tilted in the same direction and block under the jacks, the transverse movement of the protecting gate is blocked by the first stop dog when only the first driving slope is pressed down, the transverse movement of the protecting gate is blocked by the second stop dog when only the second driving slope is pressed down, the tilting direction of the first driving slope is identical to the distribution direction of two jacks in the same pair of jacks, a support ridge is arranged on the lower end surface of the protecting gate, the extension direction of the support ridge is perpendicular to the opening direction of the protecting gate, and the protecting gate is rotatably connected in the casing in a sliding way through the support ridge. The socket protecting gate has a monopole plugging preventing function and the advantages of high monopole plugging preventing response speed and great reliability and solves the problem that the existing socket protecting gate reset by the compressed spring cannot prevent a monopole from being plugged in.
Description
Technical field
The present invention relates to socket protective door, particularly relate to the socket protective door that a kind of stage clip resets.
Background technology
Socket is for electrical equipment provides the electric equipment of power interface, is also use more electrical accessory in design of residence, and it and people live ten close relationships.In order to improve the electrical safety of socket, usually can shutter being set in socket and being also emergency exit.Shutter is arranged on above the sleeve of socket, plug insert time drive shutter open, plug extract after under the effect of back-moving spring shutter automatically reset to gear above sleeve, make object to be strayed into sleeve, thus play prevent get an electric shock effect.Shutter back-moving spring have for Compress Spring, have for torsion spring.Chinese Patent Application No. be 2014100367769, publication date be April 30 in 2014 day, be called in the patent documentation of " a kind of multi-function jack safety protection gate " and disclose a kind of socket protective door being undertaken resetting by stage clip.Socket protective door in this patent comprises housing and shutter unit; housing comprises panel; panel is provided with some to jack; insert for the L pole latch in same plug and N pole latch with two jacks in a pair jack; shutter unit comprises the first driving inclined-plane and second being provided with tendency direction identical and drives the shutter being positioned at housing on inclined-plane and the stage clip that shutter is resetted; first drives inclined-plane and second to drive inclined-plane to align correspondingly with two jacks in a pair jack, and the telescopic direction of stage clip is identical with the glide direction of shutter.Shutter in this patent document has the following disadvantages: can not touch the live parts such as sleeve through jack insertion, also namely can not prevent one pole from inserting to preventing probe.
Summary of the invention
The invention provides a kind of anti-one pole insert fast response time and good reliability there is the socket protective door that stage clip that anti-one pole inserts function resets, solve socket protective door that existing stage clip resets and can not prevent one pole from inserting and the problem of poor stability that causes.
The socket protective door that second object of the present invention is intended to provide further a kind of stage clip of compact in design to reset, the convenience when socket protective door resetted to improve stage clip uses in the socket of compact layout.
The socket protective door that 3rd object of the present invention is intended to provide further a kind of stage clip of multiple shutter units shared stage clip to reset, to reduce the number of components of the socket with multiple shutter.
Above technical problem is solved by following technical proposal: the socket protective door that a kind of stage clip resets, comprise housing and shutter unit, described housing comprises panel, described panel is provided with some to jack, insert for the L pole latch in same plug and N pole latch with two jacks in a pair jack, described shutter unit comprises the shutter being positioned at described housing being provided with the first identical driving inclined-plane of tendency direction and the second driving inclined-plane, and the stage clip that shutter is resetted, described first drives inclined-plane and second to drive inclined-plane to align correspondingly with two jacks in a pair jack, the telescopic direction of described stage clip is identical with the glide direction of described shutter, described shutter unit also comprises the first block stopping shutter translation when only pressing down the first driving inclined-plane and the second block stopping shutter translation when only pressing down the second driving inclined-plane, described first block and the second block distribute along the vertical direction and are all arranged at described housing, form shutter between described first block and the second block and open sliding channel, described first drives the tendency direction on inclined-plane identical with the distribution arrangement with two jacks in a pair jack, described housing is provided with chute and sliding surface, the bearing of trend of described chute is identical with the distribution arrangement with two jacks in a pair jack, the lower surface of described shutter is provided with support ridge, the bearing of trend of described support ridge is vertical with the distribution arrangement with two jacks in a pair jack, slide and be located in described chute in the upper end of described shutter, lower end is connected on described sliding surface by described support ridge.L pole sleeve in two same socket units of jack during use in a pair jack and the alignment of N sleeve, shutter is isolated between sleeve and jack.When two latches of plug insert a pair jack simultaneously; then first drive inclined-plane and second to drive inclined-plane to be all subject to suppressing action, now shutter to be supported on sliding surface with support ridge be that the mode of carrying out sliding produces translation (translation direction is identical with the distribution arrangement of two jacks in a pair jack); the effect of blocking that shutter is opened sliding channel through shutter and lost jack; plug can insert, and then automatically resets under the effect of stage clip when pulling the plug out of the socket.Two blocks are set, when one pole inserts, shutter is that axle produces and rotates and make to complete translation motion and also can not open the door together with being connected to the one in the second block with the first block with support ridge, thus achieve anti-probe with simple respective outer side edges and insert.Namely produce the axially vertical of rotating shaft when rotating owing to driving the tendency direction opening direction of shutter (also) on inclined-plane with shutter; when making to be subject to one-sided driving; shutter can quick rotation and abut on block; the phenomenon (phenomenon also can opened when also namely one pole inserts) that block is crossed in response not in time can not be produced, therefore good reliability.
As preferably, described shutter is vertical with the glide direction of described shutter with the distribution arrangement of stage clip.Compact in design, achieves second goal of the invention.
As preferably; it is two right that described jack has; the distribution arrangement of two pairs of jacks is vertical with the distribution arrangement with two jacks in a pair jack; described shutter unit has two; two shutter units shared stage clips; the opening direction of two shutter unit is contrary, and described shutter is provided with crushing block, and the described crushing block in two shutter unit is connected to the two ends of described stage clip.Achieve the 3rd goal of the invention.
As preferably, between the shutter of described stage clip in two shutter unit.Convenience when compact in design and assembling can be improved further.
As preferably, described shutter unit also comprises the guide vane end stop preventing described shutter from opening along the direction away from described first block, and described guide vane end stop is connected to described housing.Can gap between shutter and housing larger time, probe can not be inserted through gap and go oppositely to stir shutter and cause shutter to be opened, high barrier propterty can be met with lower quality of fit.
As preferably; described shutter unit also comprises the baffle plate preventing described shutter from opening along the distribution arrangement perpendicular to two jacks in same a pair jack; described shutter is provided with the spacing hole extended along the distribution arrangement with two jacks in a pair jack, and described baffle plate is located in described spacing hole.Can gap between shutter and housing larger time, can not insert probe through gap and go stir shutter along the direction perpendicular to shutter movement and cause shutter to be opened, fail safe is better.
As preferably; described housing also comprises dividing plate, and be Split type structure between described dividing plate and panel, described dividing plate is provided with a pair via hole; two via holes in a pair via hole are correspondingly with two receptacle alignment in a pair jack, and shutter unit is between described panel and next door.Convenient when fixing shutter and stage clip, improve convenience during making.
As preferably, both described first block and the second block, one is located at described panel, another one is located at described dividing plate.Easy to make.
As preferably, the supporting surface of described support ridge is cambered surface, and described support ridge is with being linear contact lay between described sliding surface.Stationarity when shutter swings is good, can not produce jumping phenomena and cause the electrical connection in socket to produce loosening and cross the phenomenon of block to produce (if crossed block, meaned and can be unlocked) in swing process rapidly.
The present invention has following advantage: about two blocks distributed are set and the translation direction of shutter with shutter produce rotate time rotation axis axially vertical; when making shutter be subject to one-sided driving; shutter can quick rotation and abut on block; the phenomenon that block is crossed in response not in time can not be produced, good reliability.
Accompanying drawing explanation
Fig. 1 is the perspective view after the present invention removes dividing plate in fact.
Fig. 2 is schematic top plan view of the present invention.
Fig. 3 is A-A cross-sectional schematic of Fig. 2.
Fig. 4 is the view that the present invention inserts plug when using.
Fig. 5 is the present invention inserts probe when using view from the jack of a pair jack.
Fig. 6 is the present invention inserts probe when using view from another jack a pair jack.
In figure: housing 1, panel 11, chute 12, jack 13, via hole 14, sliding surface 15, dividing plate 16, shutter unit 2, shutter 21, spacing hole 211, dodge hole 212, support ridge 213, crushing block 214, first drive inclined-plane 215, second drive inclined-plane 216, stage clip 22, second block 23, guide vane end stop 24, first block 25, baffle plate 26, shutter open sliding channel 3, sleeve 4, plug 5, latch 51, probe 6.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is further illustrated.
See Fig. 1, the socket protective door that a kind of stage clip resets, comprises panel 11.The lower surface of panel 11 is provided with two chutes 12.Chute 12 extends in left-right direction.Panel 11 forms for plastic production.
Two shutter unit 2 are provided with in the downside (upside namely in figure) of panel 11.Two shutter unit 2 distribute along the longitudinal direction.Shutter unit 2 comprises shutter 21, stage clip 22, second block 23 and guide vane end stop 24.Slide and be located in chute 12 in the upper end of shutter 21.Two shutter unit 2 be oppositely be arranged in panel 11, therefore the opening direction of two shutter unit be contrary (be specially a shutter be move right carry out opening, another is be moved to the left unlatching).Shutter 21 is provided with spacing hole 211 and dodges hole 212.Spacing hole 211 and dodge hole 212 and be connected as a single entity.The lower surface of shutter 21 is provided with support ridge 213.Support ridge 213 extends along the longitudinal direction.Shutter 21 is provided with crushing block 214.Stage clip 22 extends in left-right direction (be also and stretch in left-right direction).Two shutter unit 2 share with stage clip 22.Between the shutter 21 of stage clip 22 in two shutter unit 2.Crushing block 214 in two shutter unit 2 is connected to the two ends, left and right of stage clip 22.Second block 23 and guide vane end stop 24 are all connected on the inner surface of panel 11.Second block 23 and guide vane end stop 24 are distributed in the two ends, left and right of shutter 21.
See Fig. 2, panel 11 is provided with two pairs of jacks 13.Two pairs of jacks 13 distribute along the longitudinal direction.Distribute in left-right direction with two jacks in a pair jack.A pair jack in two pairs of jacks 13 forms L pole jack in two pole sockets and N pole jack, another forms L pole jack in three grades of sockets and N pole jack (the L pole jack certainly formed in another two pole socket by changing position and pass and N pole jack are also fine) to jack.Two shutter 22(are see Fig. 1) block correspondingly in the below of two pairs of jacks 13.
See Fig. 3, below panel 11, be also provided with dividing plate 16.Dividing plate 16 forms for plastic production.Dividing plate 16 and panel 11 surround housing 1.It is Split type structure between dividing plate 16 and panel 11.Linked together by button bit between dividing plate 16 and panel 11.Dividing plate 16 is provided with in two couples of via hole 14(figure can only see a pair).Two via holes in a pair via hole 14 are correspondingly with two receptacle alignment in a pair jack 13.The upper surface of dividing plate 16 is provided with sliding surface 15.Sliding surface 15 is plane.
Shutter unit 2 is between dividing plate 16 and panel 11.Shutter unit 2 also comprises the first block 25 and baffle plate 26.First block 25 and baffle plate 26 are arranged at the upper surface of dividing plate 12.Form shutter between first block 25 and the second block 23 and open sliding channel 3.The right-hand member of the upper surface of shutter 21 is provided with the first driving inclined-plane 215, left end is provided with the second driving inclined-plane 216.First drives inclined-plane 215 and second to drive inclined-plane 216 to align correspondingly with two jacks in a pair jack 13.First drives inclined-plane 215 and second to drive the incline direction on inclined-plane 216 identical.First drives inclined-plane 215 to tilt in the mode of upper end towards a left side.Second drives lower end, inclined-plane 216 to align with dodging hole 212.
Baffle plate 26 is located in spacing hole 211.The lower end of shutter 21 is connected on sliding surface 15 by support ridge 213.In the supporting surface of support ridge 213 and figure, downside is cambered surface.Support ridge 213 is with being linear contact lay between sliding surface 15.
Due to the barrier effect of guide vane end stop 24, making can not by dialling sled shutter 21 towards the direction (namely in figure direction) to the right of opening sliding channel 3 away from shutter and makes shutter 21 towards right unlatching.
See Fig. 4, during use, namely panel 11 forms the panel of socket.Two via holes in a pair via hole 14 are arranged in the top of two sleeves 4 of same socket correspondingly.One in two sleeves 4 is L pole sleeve, another is N sleeve.One in two latch 51(, two latches 51 of same plug 5 is L pole latch, another root is N pole latch) when inserting in a pair jack 13 two jacks correspondingly; two latches 51 drive first to drive correspondingly, and inclined-plane 215 and second drives inclined-plane 216, the result of effect is shutter 21 translation and opens in sliding channel 3 through shutter; shutter 21 is lost and blocks effect to two sleeves 4, two latches 51 continue lower inserting and are inserted in two sleeves 4 through two via holes in a pair via hole 14 correspondingly.Crushing block 214(is passed through see Fig. 1 in the process of shutter 21 translation) extrude stage clip 22(see Fig. 1) and make stage clip energy storage.When pull the plug out of the socket 5 time, stage clip is released energy and below two jacks driving shutter 21 to be reset to by sliding channel 3 to block in a pair jack 13.
See Fig. 5; when probe 6 inserts from a jack a pair jack 13; probe 6 drive the first driving inclined-plane 215 make shutter 21 with support ridge 213 for axle rotate clockwise while also left slide (in this process stage clip energy storage); the result that shutter 21 rotates is that the left end of shutter 21 is connected to together with the second block 23 and can not enters that shutter is opened in sliding channel 3, also namely shutter 21 can not be unlocked; therefore shutter still cuts off between sleeve 4 and jack 13, therefore probe 6 can not be inserted in sleeve 4.When extracting probe 6, stage clip 22(is see Fig. 1) release energy and drive shutter 21 to reset.
See Fig. 6; when probe 6 inserts from another jack a pair jack 13; probe 6 drive the second driving inclined-plane 216 make shutter 21 with support ridge 213 for axle rotate counterclockwise while also left slide (in this process stage clip energy storage); the result that shutter 21 rotates is that the left end of shutter 21 is connected to together with the first block 25 and can not enters that shutter is opened in sliding channel 3, also namely shutter 21 can not be unlocked; therefore shutter still cuts off between sleeve 4 and jack 13, therefore probe 6 can not be inserted in sleeve 4.When extracting probe 6, stage clip 22(is see Fig. 1) release energy and drive shutter 21 to reset.
Claims (9)
1. the socket protective door of a stage clip reset, comprise housing and shutter unit, described housing comprises panel, described panel is provided with some to jack, insert for the L pole latch in same plug and N pole latch with two jacks in a pair jack, described shutter unit comprises the shutter being positioned at described housing being provided with the first identical driving inclined-plane of tendency direction and the second driving inclined-plane, and the stage clip that shutter is resetted, described first drives inclined-plane and second to drive inclined-plane to align correspondingly with two jacks in a pair jack, the telescopic direction of described stage clip is identical with the glide direction of described shutter, it is characterized in that, described shutter unit also comprises the first block stopping shutter translation when only pressing down the first driving inclined-plane and the second block stopping shutter translation when only pressing down the second driving inclined-plane, described first block and the second block distribute along the vertical direction and are all arranged at described housing, form shutter between described first block and the second block and open sliding channel, described first drives the tendency direction on inclined-plane identical with the distribution arrangement with two jacks in a pair jack, described housing is provided with chute and sliding surface, the bearing of trend of described chute is identical with the distribution arrangement with two jacks in a pair jack, the lower surface of described shutter is provided with support ridge, the bearing of trend of described support ridge is vertical with the distribution arrangement with two jacks in a pair jack, slide and be located in described chute in the upper end of described shutter, lower end is connected on described sliding surface by described support ridge.
2. the socket protective door of stage clip reset according to claim 1, it is characterized in that, described shutter is vertical with the glide direction of described shutter with the distribution arrangement of stage clip.
3. the socket protective door of stage clip reset according to claim 2; it is characterized in that; it is two right that described jack has; the distribution arrangement of two pairs of jacks is vertical with the distribution arrangement with two jacks in a pair jack; described shutter unit has two, two shutter units shared stage clips, and the opening direction of two shutter unit is contrary; described shutter is provided with crushing block, and the described crushing block in two shutter unit is connected to the two ends of described stage clip.
4. the socket protective door of stage clip reset according to claim 3, is characterized in that, between the shutter of described stage clip in two shutter unit.
5. the socket protective door that stage clip resets according to claim 1 or 2 or 3 or 4, is characterized in that, described shutter unit also comprises the guide vane end stop preventing described shutter from opening along the direction away from described first block, and described guide vane end stop is connected to described housing.
6. the socket protective door that stage clip resets according to claim 1 or 2 or 3 or 4; it is characterized in that; described shutter unit also comprises the baffle plate preventing described shutter from opening along the distribution arrangement perpendicular to two jacks in same a pair jack; described shutter is provided with the spacing hole extended along the distribution arrangement with two jacks in a pair jack, and described baffle plate is located in described spacing hole.
7. the socket protective door of stage clip reset is stated according to claim 1 or 2 or 3 or 4; it is characterized in that; described housing also comprises dividing plate; it is Split type structure between described dividing plate and panel; described dividing plate is provided with a pair via hole; two via holes in a pair via hole are correspondingly with two receptacle alignment in a pair jack, and shutter unit is between described panel and dividing plate.
8. the socket protective door that resets of stage clip according to claim 7, it is characterized in that, both described first block and the second block, one is located at described panel, another one is located at described dividing plate.
9. state according to claim 1 or 2 or 3 or 4 socket protective door that stage clip resets, it is characterized in that, the supporting surface of described support ridge is cambered surface, and described support ridge is with being linear contact lay between described sliding surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410769549.7A CN104577432B (en) | 2014-12-15 | 2014-12-15 | The socket protective door that stage clip resets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410769549.7A CN104577432B (en) | 2014-12-15 | 2014-12-15 | The socket protective door that stage clip resets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104577432A true CN104577432A (en) | 2015-04-29 |
| CN104577432B CN104577432B (en) | 2016-12-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410769549.7A Active CN104577432B (en) | 2014-12-15 | 2014-12-15 | The socket protective door that stage clip resets |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104577432B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107275854A (en) * | 2017-06-26 | 2017-10-20 | Tcl通力电子（惠州）有限公司 | Socket |
| CN107689505A (en) * | 2016-08-03 | 2018-02-13 | 施耐德电气（澳大利亚）有限公司 | Socket protection door component and socket |
| CN107834260A (en) * | 2017-11-02 | 2018-03-23 | 罗格朗(北京)电气有限公司 | Socket protective door and socket |
| CN107959158A (en) * | 2016-10-17 | 2018-04-24 | 青米（北京）科技有限公司 | A kind of protection door module and protection door module group |
| CN112038812A (en) * | 2020-09-04 | 2020-12-04 | 成都阿尔刚雷绝缘连电插座制造有限公司 | Safety protection device |
| US11447982B2 (en) | 2019-03-26 | 2022-09-20 | Raytheon Company | Multidirectional enclosure compression locking mechanism |
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| JPH0955250A (en) * | 1995-08-04 | 1997-02-25 | Hakutoku Denshi Kofun Yugenkoshi | Plug socket structure |
| CN202259854U (en) * | 2011-09-23 | 2012-05-30 | 杭州鸿雁电器有限公司 | Shutter structure of five-jack socket |
| CN202333236U (en) * | 2011-11-18 | 2012-07-11 | 公牛集团有限公司 | Protection door capable of preventing monopole plugging |
| CN202423644U (en) * | 2012-02-16 | 2012-09-05 | 李喜谦 | Dipolar socket for preventing insertion of single pole |
| CN204289818U (en) * | 2014-12-15 | 2015-04-22 | 公牛集团有限公司 | The socket protective door that stage clip drives |
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2014
- 2014-12-15 CN CN201410769549.7A patent/CN104577432B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0955250A (en) * | 1995-08-04 | 1997-02-25 | Hakutoku Denshi Kofun Yugenkoshi | Plug socket structure |
| CN202259854U (en) * | 2011-09-23 | 2012-05-30 | 杭州鸿雁电器有限公司 | Shutter structure of five-jack socket |
| CN202333236U (en) * | 2011-11-18 | 2012-07-11 | 公牛集团有限公司 | Protection door capable of preventing monopole plugging |
| CN202423644U (en) * | 2012-02-16 | 2012-09-05 | 李喜谦 | Dipolar socket for preventing insertion of single pole |
| CN204289818U (en) * | 2014-12-15 | 2015-04-22 | 公牛集团有限公司 | The socket protective door that stage clip drives |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107689505A (en) * | 2016-08-03 | 2018-02-13 | 施耐德电气（澳大利亚）有限公司 | Socket protection door component and socket |
| CN107689505B (en) * | 2016-08-03 | 2020-04-10 | 施耐德电气（澳大利亚）有限公司 | Protective door assembly for socket and socket |
| CN107959158A (en) * | 2016-10-17 | 2018-04-24 | 青米（北京）科技有限公司 | A kind of protection door module and protection door module group |
| CN107275854A (en) * | 2017-06-26 | 2017-10-20 | Tcl通力电子（惠州）有限公司 | Socket |
| CN107834260A (en) * | 2017-11-02 | 2018-03-23 | 罗格朗(北京)电气有限公司 | Socket protective door and socket |
| CN107834260B (en) * | 2017-11-02 | 2024-05-14 | 罗格朗智能电气(惠州)有限公司 | Socket protection door and socket |
| US11447982B2 (en) | 2019-03-26 | 2022-09-20 | Raytheon Company | Multidirectional enclosure compression locking mechanism |
| CN112038812A (en) * | 2020-09-04 | 2020-12-04 | 成都阿尔刚雷绝缘连电插座制造有限公司 | Safety protection device |
| CN112038812B (en) * | 2020-09-04 | 2022-02-22 | 成都阿尔刚雷绝缘连电插座制造有限公司 | Safety protection device |
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|---|---|
| CN104577432B (en) | 2016-12-07 |
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Address after: 315314 East District of Industrial Park, Cixi, Ningbo, Zhejiang Patentee after: Bulls group Limited by Share Ltd Address before: 315314 East District of Industrial Park, Cixi, Ningbo, Zhejiang Patentee before: Gongniu Group Co., Ltd. |
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