CN108445588A - A kind of optical fiber connector of suitable quick assembling - Google Patents
A kind of optical fiber connector of suitable quick assembling Download PDFInfo
- Publication number
- CN108445588A CN108445588A CN201810474355.2A CN201810474355A CN108445588A CN 108445588 A CN108445588 A CN 108445588A CN 201810474355 A CN201810474355 A CN 201810474355A CN 108445588 A CN108445588 A CN 108445588A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- liner
- connector
- quick assembling
- fiber connector
- 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.)
- Granted
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 23
- 230000013011 mating Effects 0.000 claims abstract description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 101100008048 Caenorhabditis elegans cut-4 gene Proteins 0.000 description 3
- 101100008050 Caenorhabditis elegans cut-6 gene Proteins 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 241001656951 Protheca Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
- G02B6/3825—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres with an intermediate part, e.g. adapter, receptacle, linking two plugs
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
- G02B6/3818—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type
- G02B6/3821—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type with axial spring biasing or loading means
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3869—Mounting ferrules to connector body, i.e. plugs
Abstract
The present invention discloses a kind of optical fiber connector of suitable quick assembling, liner including adapter shell body, suitable for adapter shell body and the connector outer housing mating with liner, adapter shell body is hollow cavity structure, both ends are openning shape, and cavity two side is equipped with internal stent, centre is provided with first sleeve；The circumferential position of first sleeve one end is provided with the second cross spacing unit, and the internal stent connecting pin of two opposition is equipped with the first buckle boss；Liner include two opposition setting assign holder, second casing and a fixed frame, assign holder pass through fixed frame, fixed by fixed frame；The both sides of holder one end are assigned to be equipped with the first cross spacing unit, the first cross spacing unit and the second cross spacing unit matching use；Other end both sides are both provided with clamping foot, and clamping foot is made of the second buckle boss and circular arc boss；The both sides of fixed frame are both provided with first longitudinal direction position-limiting unit.
Description
Technical field
The present invention relates to field of connectors, specially a kind of optical fiber connector of suitable quick assembling.
Background technology
Optical fiber connector is mainly used for realizing from light source to optical fiber, between fiber-to-fiber and optical fiber and detector
Optical coupling, wherein SC types optical fiber connector are with insertion loss is low, return loss is high, packing density is high, at low cost, easy to use
The advantages that, it is used widely in fiber to the home FTTx engineerings.Currently, it is by two standard SC types that optical fiber connector is most common
Connector and a standard adapter composition, although this connector construction all uses universal standard part, number of parts is more, even
Connector assembly process is more, and directly determines production efficiency and cost for optical fiber connector, number of parts and assembly process,
Therefore, it on the basis of meeting the transmission performances such as insertion loss, does not influence to use function, more even improves the premise of working efficiency
Under, it reduces optical fiber connector production efficiency, reduce amount of parts.
Bulletin be CN201520992579.4 patent, including the shell of both ends open and in the shell in
Core, the shell are internally provided with internal stent, and one end of the internal stent is equipped with the first sleeve, the inner core packet
It includes and assigns holder and second sleeve；The inner core is equipped with the first cross spacing unit and first longitudinal direction position-limiting unit；Described
The inner wall of shell is equipped with the second cross spacing unit and second longitudinal direction position-limiting unit；The first cross spacing unit includes setting
The protrusion in the internal stent front and rear end is set, the second cross spacing unit includes the inner wall being arranged in shell
Two with the described mutually matched positive stop strip of protrusion.The second cross spacing unit includes the inner wall being arranged in shell
Two with the described mutually matched positive stop strip of protrusion.The first longitudinal direction position-limiting unit includes being arranged in the inside
The reed of the left and right end face of holder, the second longitudinal direction position-limiting unit include and the mutually matched blocking portion of the reed.It should
Patent structure is complicated, and the various parts such as setting positive stop strip, position-limiting unit increase production cost, wanted to the accuracy of fitness
It asks and more increases, be unfavorable for producing.So needs one kind is simple in structure, parts quantity is few, process is few, it is at low cost, and can be square
Just dismounting is safeguarded, is conducive to the optical fiber connector of quick assembling.
Invention content
The purpose of the present invention is to provide a kind of optical fiber connectors of suitable quick assembling, to solve in above-mentioned background technology
The problem of proposition.
To achieve the above object, the present invention provides the following technical solutions：A kind of optical fiber connector of suitable quick assembling, packet
Include adapter shell body, the liner suitable for the adapter shell body and the connector outer housing mating with the liner, institute
It is hollow cavity structure to state adapter shell body, and both ends are openning shape, and cavity two side is equipped with internal stent, and centre is provided with
First sleeve；The circumferential position of described first sleeve one end is provided with the second cross spacing unit, the inside of two opposition
Holder connecting pin is equipped with the first buckle boss；The liner include two opposition setting assign holder, second casing and
One fixed frame, it is described that holder is assigned to pass through the fixed frame, it is fixed by the fixed frame；It is described to assign the two of holder one end
Side is equipped with the first cross spacing unit, and the first cross spacing unit is used with the second cross spacing unit matching；
Other end both sides are both provided with clamping foot, and the clamping foot is made of the second buckle boss and circular arc boss；The fixed frame
Both sides are both provided with first longitudinal direction position-limiting unit, and the first longitudinal direction position-limiting unit is used cooperatively with the buckle boss；It is described
Second cannula tip is equipped with 2 salient points, and the setting of caudal peduncle position is fluted inside the connector outer housing, the salient point with it is described
Groove is used cooperatively；Connector outer housing both sides be provided with convex shape straight slot and be oriented to groove, the convex shape straight slot and
It is provided with plane chuck on the guiding groove；The clamping foot pass through the convex shape straight slot, it is described second buckle boss with
The plane chuck clamping, the circular arc boss are used cooperatively with the guiding groove.
As a preferred technical solution of the present invention, the adapter shell body and the setting set between the liner
Pipe, described sleeve pipe match with the first sleeve.
As a preferred technical solution of the present invention, described liner one end is exposed at outside the adapter shell body, with
The connector outer housing cooperation.
As a preferred technical solution of the present invention, lock pin group is set between the connector outer housing and the liner
Part.
As a preferred technical solution of the present invention, the first sleeve and second casing are ceramic material system
At.
As a preferred technical solution of the present invention, the circular arc boss pressable is set in the internal stent.
As a preferred technical solution of the present invention, spring, the lock pin group are detachably cased on the ferrule assembly
Part is used cooperatively with second casing.
Compared with prior art, the present invention is improved the original connector of tradition, reduce outer housing in connector,
The parts such as protheca, backstop, tail sleeve simplify connector assembly process, can significantly reduce the production cost of connector, while making connection
Head connect with adapter it is reliable, ensure that optical fiber connects that insertion loss is small, the circular arc boss that internal lining is arranged is pressed, can be with
Quick release liner and connector shell are conveniently replaceable repair, and the configuration of the present invention is simple, parts quantity is few, process is few, at
This is low, is adapted to be widely popularized.
Description of the drawings
Fig. 1 is the assembly decomposition diagram of the present invention.
Fig. 2 is the overall appearance schematic diagram that connector device of the present invention matches finished product.
Fig. 3 is the sectional view of the whole assembly finished product of the present invention.
Fig. 4 is the sectional view of adapter shell body of the present invention.
Fig. 5 is the outside drawing of adapter shell body of the present invention.
Fig. 6 is the structural schematic diagram of liner of the present invention.
Fig. 7 is the sectional view of connector outer housing of the present invention.
Fig. 8 is the outside drawing of connector outer housing of the present invention.
In reference numeral：1- adapter shell bodies；2- liners；3- connector outer housings；4- internal stents；5- first sets
Pipe；6- the second cross spacing units；7- first buckles boss；8- assigns holder；The second casings of 9-；10- fixed frames；11- first
Cross spacing unit；12- second buckles boss；13- circular arc boss；14- first longitudinal direction position-limiting units；15- salient points；16- grooves；
17- convex shape straight slots；18- is oriented to groove；19- plane chuck；20- casings；21- ferrule assemblies；22- springs.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
- 8 are please referred to Fig.1, the present invention provides a kind of optical fiber connector of suitable quick assembling, including the first fixed plate 1,
Two fixed plates 2 and warning silk screen 3 are provided with the first half round cut 4 in first fixed plate 1, and the both sides of the first half round cut 4 are all provided with
It is equipped with the first connecting hole 5, the second half round cut 6 is provided in the second fixed plate 2, the both sides of the second half round cut 6 are both provided with
Second connecting hole 7；First half round cut 4 and the second half round cut 6 constitute positive round, and positive round inner wall is provided with recessed card slot 8, recessed card slot
8 will warn the marginal position of silk screen 3 to fix.First fixed plate 1 and the second fixed plate 2 are merged and are square shape, the first fixed plate 1
It is identical structure with the second fixed plate 2.Three regular sides of first fixed plate 1, the second fixed plate 2, gradually become from centre to edge
It is thin, form slope.Warning 3 mesh specification of silk screen is 1-2cm diameter apertures.The centre position of warning silk screen 3 is provided with perforation 9,
3 surface of warning silk screen is provided with fluorescent paint.Bolt is provided through in first connecting hole 5 and the second connecting hole 7, first is solid
Fixed board 1 and the second fixed plate 2 are detachably connected by the first connecting hole 5, the second connecting hole 7 and bolt.The 8 lower section setting of recessed card slot
There are cushion rubber bumper 10, cushion rubber bumper 10 to be separately fixed in the first fixed plate 1 and the second fixed plate 2.
Operation principle：When specifically used, the present invention includes adapter shell body 1, liner 2 and the connection mating with liner 2
Head outer housing 3, adapter shell body 1 has is additionally provided with internal stent 4 in the middle part of hollow cavity and cavity, and 4 one end of internal stent is set
There are first sleeve 5, cavity two to be equipped with the first buckle boss 7 with respect to madial wall, liner 2 includes assigning holder 8 and the second casing
9, when installation, internal stent 4 and holder 8 is assigned to cooperate, liner 2 is equipped with the first cross spacing unit 11 and first longitudinal direction limits
Bit location 14, adapter shell body 1 have the second cross spacing unit 6, first longitudinal direction position-limiting unit 14 to match with the first buckle boss 7
It closes, connection is reliable, prevents liner 2 from falling off in connector swapping process；First cross spacing unit 11 and the second cross spacing list
Member 6 coordinates, and plays position-limiting action, prevents liner 2 from not rotating so that the cavity of first sleeve 7 and the formation of the second casing 9,
Porcelain bushing is accommodated well, keeps assembly precision high, while porcelain bushing plays the role of centered alignment.Outside the adapter of the present invention
Shell 1 is compared with standard adapter outer housing, and one end of adapter shell body 1 is shortened, and 2 side of liner is exposed at adapter after assembly
1 outside of outer housing, coordinates with connector outer housing 3.There are 2 salient points 15 in 9 end of the second casing of liner 2, with connector shell
The groove 16 at caudal peduncle position coordinates in body 3, ensure caudal peduncle it is axially mounted in place, and prevent caudal peduncle and the lock pin on the caudal peduncle
It is rotated in swapping process, ensures that connection is reliable.Meanwhile assigning the clamping foot of 4 one end of holder that there is the second buckle boss 12 and circle
Arc boss 13,3 both sides of connector outer housing have convex shape straight slot 17, the clamping foot of liner 2 to pass through convex shape straight slot 17, the second card
It detains boss 12 and the plane chuck 19 of connector outer housing 3 is clamped, ensure connector outer housing 3 and adapter axial restraint；Even
3 inside of joint shell body, which is additionally provided with, is oriented to groove 18, coordinates with the circular arc boss 13 of liner 2, play the guiding role, ensures connection
Head outer housing 3 is centering with adapter plug, while after the completion of assembly, can pass through and press circular arc boss 13, the second card of unlock
The clamping structure for detaining boss 12 and connector outer housing 3 facilitates connector outer housing 3 to extract.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of optical fiber connector of suitable quick assembling, including adapter shell body (1), it is suitable for the adapter shell body
(1) liner (2) and the connector outer housing (3) mating with the liner (2), which is characterized in that the adapter shell body
(1) it is hollow cavity structure, both ends are openning shape, and cavity two side is equipped with internal stent (4), and centre is provided with first sleeve
(5)；The circumferential position of described first sleeve (5) one end is provided with the second cross spacing unit (6), the inside of two opposition
Holder (4) connecting pin is equipped with the first buckle boss (7)；The liner (2) include two opposition setting assign holder (8), one
A second casing (9) and a fixed frame (10), it is described that holder (8) is assigned to pass through the fixed frame (10), pass through the fixation
Frame (10) is fixed；Described that the both sides of holder (8) one end is assigned to be equipped with the first cross spacing unit (11), described first laterally limits
Bit location (11) is used cooperatively with the second cross spacing unit (6)；Other end both sides are both provided with clamping foot, the clamping
Foot is made of the second buckle boss (12) and circular arc boss (13)；The both sides of the fixed frame (10) are both provided with first longitudinal direction limit
Bit location (14), the first longitudinal direction position-limiting unit (14) are used cooperatively with the buckle boss (7)；Second casing (9)
End is equipped with 2 salient points (15), and fluted (16) are arranged in the connector outer housing (3) internal caudal peduncle position, the salient point
(15) it is used cooperatively with the groove (16)；Connector outer housing (3) both sides are provided with convex shape straight slot (17) and are oriented to
It is provided with plane chuck (19) on groove (18), the convex shape straight slot (17) and the guiding groove (18)；The clamping foot
Across the convex shape straight slot (17), the second buckle boss (12) is clamped with the plane chuck (19), and the circular arc is convex
Platform (13) is used cooperatively with the guiding groove (18).
2. a kind of optical fiber connector of suitable quick assembling according to claim 1, it is characterised in that：Outside the adapter
Shell (1) and the setting casing (20) between the liner (2), described sleeve pipe (20) match with the first sleeve (5).
3. a kind of optical fiber connector of suitable quick assembling according to claim 1, it is characterised in that：The liner (2)
One end is exposed at adapter shell body (1) outside, coordinates with the connector outer housing (3).
4. a kind of optical fiber connector of suitable quick assembling according to claim 1, it is characterised in that：Outside the connector
Ferrule assembly (21) is set between shell (3) and the liner (2).
5. a kind of optical fiber connector of suitable quick assembling according to claim 1, it is characterised in that：The first sleeve
(5) it is that ceramic material is made with second casing (9).
6. a kind of optical fiber connector of suitable quick assembling according to claim 1, it is characterised in that：The circular arc boss
(13) pressable is set in the internal stent (4).
7. a kind of optical fiber connector of suitable quick assembling according to claim 4, it is characterised in that：The ferrule assembly
(21) spring (22) is detachably cased on, the ferrule assembly (21) is used cooperatively with second casing (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810474355.2A CN108445588B (en) | 2018-05-17 | 2018-05-17 | Optical fiber connector suitable for rapid assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810474355.2A CN108445588B (en) | 2018-05-17 | 2018-05-17 | Optical fiber connector suitable for rapid assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108445588A true CN108445588A (en) | 2018-08-24 |
| CN108445588B CN108445588B (en) | 2023-09-19 |
Family
ID=63203965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810474355.2A Active CN108445588B (en) | 2018-05-17 | 2018-05-17 | Optical fiber connector suitable for rapid assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108445588B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946795A (en) * | 2019-03-27 | 2019-06-28 | 南京续点通信科技有限公司 | A kind of FC-SC type takes optical adapter |
| CN110632706A (en) * | 2019-09-30 | 2019-12-31 | 山东信通电子股份有限公司 | Optical fiber adapter |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5774612A (en) * | 1995-08-02 | 1998-06-30 | Molex Incorporated | Adapted for interconnecting optical fiber connectors |
| US6188825B1 (en) * | 1999-04-15 | 2001-02-13 | Lucent Technologies, Inc. | Dust cover for protecting optical fiber sleeve housing |
| JP2002006175A (en) * | 2000-06-26 | 2002-01-09 | Furukawa Electric Co Ltd:The | Optical connector |
| US20120301080A1 (en) * | 2011-05-23 | 2012-11-29 | Senko Advanced Components, Inc. | True one piece housing fiber optic adapter |
| CN202815274U (en) * | 2012-08-10 | 2013-03-20 | 建毅科技股份有限公司 | Optical fiber connecting device |
| KR101513190B1 (en) * | 2013-10-17 | 2015-04-22 | 주식회사 골드텔 | Field installable optical adapter |
| CN205317981U (en) * | 2015-12-04 | 2016-06-15 | 杭州至卓通讯科技有限公司 | Integrated sc adapter |
| CN106526756A (en) * | 2016-12-28 | 2017-03-22 | 深圳市夏裕精密部件有限公司 | Optical fiber socket |
| CN208207280U (en) * | 2018-05-17 | 2018-12-07 | 杭州至卓通讯科技有限公司 | A kind of optical fiber connector of suitable quick assembling |
-
2018
- 2018-05-17 CN CN201810474355.2A patent/CN108445588B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5774612A (en) * | 1995-08-02 | 1998-06-30 | Molex Incorporated | Adapted for interconnecting optical fiber connectors |
| US6188825B1 (en) * | 1999-04-15 | 2001-02-13 | Lucent Technologies, Inc. | Dust cover for protecting optical fiber sleeve housing |
| JP2002006175A (en) * | 2000-06-26 | 2002-01-09 | Furukawa Electric Co Ltd:The | Optical connector |
| US20120301080A1 (en) * | 2011-05-23 | 2012-11-29 | Senko Advanced Components, Inc. | True one piece housing fiber optic adapter |
| CN202815274U (en) * | 2012-08-10 | 2013-03-20 | 建毅科技股份有限公司 | Optical fiber connecting device |
| KR101513190B1 (en) * | 2013-10-17 | 2015-04-22 | 주식회사 골드텔 | Field installable optical adapter |
| CN205317981U (en) * | 2015-12-04 | 2016-06-15 | 杭州至卓通讯科技有限公司 | Integrated sc adapter |
| CN106526756A (en) * | 2016-12-28 | 2017-03-22 | 深圳市夏裕精密部件有限公司 | Optical fiber socket |
| CN208207280U (en) * | 2018-05-17 | 2018-12-07 | 杭州至卓通讯科技有限公司 | A kind of optical fiber connector of suitable quick assembling |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946795A (en) * | 2019-03-27 | 2019-06-28 | 南京续点通信科技有限公司 | A kind of FC-SC type takes optical adapter |
| CN110632706A (en) * | 2019-09-30 | 2019-12-31 | 山东信通电子股份有限公司 | Optical fiber adapter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108445588B (en) | 2023-09-19 |
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Effective date of registration: 20240227 Address after: 313201 Deqing Industrial Park, Deqing County, Huzhou City, Zhejiang Province (Le'an village, Xinshi town) Patentee after: Zhejiang Zhizhuo Communication Technology Co.,Ltd. Country or region after: China Address before: 311113 No.1 Houyang Road, Anxi Industrial Park, Liangzhu street, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU ZHIZHUO COMMUNICATION SCIENCE & TECHNOLOGY CO.,LTD. Country or region before: China |
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