CN101879339A - Needleless dosing positive pressure connector - Google Patents
Needleless dosing positive pressure connector Download PDFInfo
- Publication number
- CN101879339A CN101879339A CN 201010223871 CN201010223871A CN101879339A CN 101879339 A CN101879339 A CN 101879339A CN 201010223871 CN201010223871 CN 201010223871 CN 201010223871 A CN201010223871 A CN 201010223871A CN 101879339 A CN101879339 A CN 101879339A
- Authority
- CN
- China
- Prior art keywords
- positive pressure
- plug
- loam cake
- pressure connector
- plinth
- 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
- 239000000463 material Substances 0.000 claims description 7
- 239000004425 Makrolon Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000000016 photochemical curing Methods 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 11
- 239000008280 blood Substances 0.000 abstract description 10
- 210000004369 blood Anatomy 0.000 abstract description 10
- 208000007536 Thrombosis Diseases 0.000 abstract description 4
- 230000005484 gravity Effects 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract 1
- 239000012634 fragment Substances 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 3
- 239000003146 anticoagulant agent Substances 0.000 description 2
- 229940127219 anticoagulant drug Drugs 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 206010038743 Restlessness Diseases 0.000 description 1
- 206010040007 Sense of oppression Diseases 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 208000003441 Transfusion reaction Diseases 0.000 description 1
- 230000001455 anti-clotting effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000023555 blood coagulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000001990 intravenous administration Methods 0.000 description 1
- 239000004531 microgranule Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to a needleless dosing positive pressure connector. The positive pressure connector can be mainly used for liquid injection, gravity transfusion and liquid extraction and is connected with a venous transfusion tube, ductus venosus and the like and started through a luer connector. A rubber plug of the positive pressure connector of the invention is opened to realize the liquid flowing in a single direction and avoid the pollution of particles, micro-fragment and the like caused by needle puncture. When an injector is removed, the positive pressure connector generates a positive pressure to make the liquid inside the positive pressure connector automatically advance and prevent blood from returning to a remaining needle and forming thrombus, so that the blockage of the remaining needle is prevented.
Description
Technical field
The present invention relates to medical instruments field, relate in particular to a kind of Needleless dosing positive pressure connector that in transfusion, produces malleation, prevents the blood backflow.
Background technology
When the patient repeatedly infuses; usually can use remaining needle; the general joint of syringe that adopts is connected with remaining needle; but finish when pulling up the joint of syringe when infusing; because the effect of negative pressure can make blood be back in the remaining needle; immobilising blood solidifies easily, and blood coagulation can cause the obstruction of remaining needle, and next time, transfusion just can't be carried out again.
Summary of the invention
Purpose of the present invention, a kind of Needleless dosing positive pressure connector is provided in order to address the above problem exactly, when syringe is pulled up, this positive pressure connector can produce a malleation, liquid in the positive pressure connector is pushed ahead, form thrombosis in the remaining needle to avoid blood to be back to, thereby prevent the obstruction of remaining needle.
The object of the present invention is achieved like this: a kind of Needleless dosing positive pressure connector, the loam cake that comprises inner hollow, plinth and plug, the top of described plinth is fixed in the lower end of described loam cake by photocuring, the lateral surface of described loam cake is provided with some on-slip ribs, described loam cake inwall has eight equally distributed drainage troughs, the cross section of described drainage trough is a rectangle, described plug comprises solid upper end and has the bottom of inner chamber, the upper end of this plug and bottom are integrated, the cross section of described plug bottom inner chamber is the flat nose head dummy, described plug is filled in the inside of described loam cake, the end face of described plug upper end is the plane and forms hermetically-sealed construction with the upper port of described loam cake, the bottom of described plug bottom has a step, this step places on the corresponding step in described plinth upper surface, there is a breach side of described plug upper end, this breach is curved, the lower end of described plinth is provided with one and has the female Luer of interior tube chamber, the interior tube chamber bottom of described female Luer is provided with a pod apertures perpendicular to axial direction, this pod apertures makes the interior tube chamber of described female Luer and the drainage trough of described loam cake form path, the upper surface of described plinth has two passages of symmetrical distribution, this passage makes the inner chamber of described plug bottom communicate with the external world, and it is fan-shaped that the cross section of described passage all is.
Above-mentioned Needleless dosing positive pressure connector, wherein, described loam cake and plinth are made by makrolon material.
Above-mentioned Needleless dosing positive pressure connector, wherein, described plug is made by the silica gel material.
Positive pressure connector of the present invention can be mainly used in injecting fluid, the gravity transfusion, Liquid extracting, with connections such as venous transfusion, venous ductes, start the unlatching of plug by female Luer, thereby realize the liquid flow of single direction, the microgranule that may bring, the pollution of little bits because syringe needle punctures to avoid, owing to adopt plug as slide core, cost is very cheap.
The present invention has the following advantages:
1. need not the function that other accessory or step just can realize Needleless dosing;
2. product structure is simple, and is easy to operate;
3. the raw material of product component has used durable material, can reduce because the situation of contact oils and fats and stress cracking;
4. when syringe is pulled up, produce a malleation, the liquid in the positive pressure connector is pushed ahead, can prevent that blood is back in the remaining needle, avoids forming thrombosis;
5. closed transfusion, enough flows;
6. do not need the lancet puncture calparine cap, avoid molecule to enter transfusion system;
7. reduce infection and the related complication that patient keeps somewhere intravenous needle and conduit, alleviate nursing staff's workload.
The present invention has following clinical advantage:
1. it is simple and convenient to sterilize, and positive pressure connector need not use the anticoagulant tube sealing after pulling up transfusion device, has reduced the inconvenience of repeatedly drawing blood and bringing to medical personnel;
2. reduce the probability that infects, the complication of the use remaining needle of attenuating, the misery that reduces repeatedly pinprick simultaneously and repeatedly draw blood and bring to patient prevents that remaining needle from stopping up;
3. positive pressure connector does not almost have dead space, and residual volume only is 0.06ML, can avoid the waste of expensive medication, guarantees the accurate of pharmaceutical quantities;
4. positive pressure connector can be avoided erythrocytic damage and reduces transfusion reaction in the process of blood transfusion;
5. go out or restless when severe as the patient, positive pressure connector and transfusion device temporarily can be separated, connect again after a while, prevent that transfusion device from twining and have mercy on or come off;
6. positive pressure connector need not use anticoagulant, only gets final product with normal saline flushing, so the problematic patient of anticlotting mechanism has been played protective effect;
7. positive pressure connector is not a disposable product, to the patient that needs venous transfusion for a long time not only safe ready but also economical and practical;
8. positive pressure connector can provide enough flows, is of great importance for some special patient.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the cutaway view of Fig. 1 along the A-A direction;
Fig. 3 is the cutaway view of Fig. 1 along the B-B direction;
Fig. 4 is the cutaway view of Fig. 1 along the C-C direction.
The specific embodiment
Referring to Fig. 1 to Fig. 4, Needleless dosing positive pressure connector of the present invention, the loam cake 1 that comprises inner hollow, plinth 2 and plug 3, the upper end of plinth 2 is fixed in the lower end of loam cake 1 by photocuring, the lateral surface of described loam cake is provided with some on-slip ribs 13, this loam cake 1 inwall has eight equally distributed drainage troughs 12, the cross section of this drainage trough 12 is a rectangle, plug 3 comprises solid upper end 31 and has the bottom 32 of inner chamber, the upper end 31 and the bottom 32 of this plug 3 are integrated, the cross section of plug bottom inner chamber 33 is the flat nose head dummy, plug 3 is filled in the inside of loam cake 1, the end face of plug upper end 31 is the plane and forms hermetically-sealed constructions with the upper port 11 of described loam cake, the bottom of plug bottom 32 has a step, this step places on the corresponding step in described plinth 2 upper surfaces, there is a breach 33 side of described plug 3 upper ends 31, this breach 33 is curved, the lower end of plinth 2 is provided with one and has the female Luer 21 of interior tube chamber 22, the interior tube chamber 22 of female Luer 21 is provided with a pod apertures 23 perpendicular to axial direction, this pod apertures 23 makes the interior tube chamber 22 of female Luer 21 and the drainage trough 12 of loam cake 1 form path, the upper surface of plinth 2 has the passage 24 of two symmetrical distributions, make the inner chamber 33 of plug bottom 32 be in communication with the outside, the air pressure that guarantees inner chamber 33 is identical with external atmosphere pressure, and it is fan-shaped that the cross section of described passage 24 all is.
In the above-mentioned Needleless dosing positive pressure connector, loam cake 1 and plinth 2 are made by makrolon material, and plug 3 is made by the silica gel material.
By the inner plug of the present invention under the oppression state and the volume differences under the normal normal state of shape produce a pressure to product female Luer direction, liquid residual in the product is pressed in the transfer conduit, thereby better meets clinical use.
The present invention closes at free state bottom plug 3, seal up the upper port of loam cake 1, when use has the syringe of straight mouthful and screw socket or other apparatus, outer cone interface compression plug 3 by its female Luer, the breach 33 of plug upper end 31 makes 31 bendings of plug upper end, simultaneously with pressure 32 transmission toward the bottom, make its get rid of in inner chamber 33 air and along surf deform, formed along loam cake upper port 11, drainage trough 12, pod apertures 23 22 1 fluid passages of tube chamber to the female Luer, because plug 3 has elasticity, after having injected, plug 3 expands and resilience is closed joint of the present invention again, simultaneously because after joint cuts out sealing, air in the plug 3 compression aforesaid liquid passages of resilience produces malleation, is that liquid residual in the fluid passage is pushed ahead, prevent that blood from refluxing, and avoids forming thrombosis.
Above embodiment is only for the usefulness that the present invention is described, but not limitation of the present invention, person skilled in the relevant technique, under the situation that does not break away from the spirit and scope of the present invention, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (3)
1. Needleless dosing positive pressure connector, it is characterized in that, the loam cake that comprises inner hollow, plinth and plug, the top of described plinth is fixed in the lower end of described loam cake by photocuring, the lateral surface of described loam cake is provided with some on-slip ribs, described loam cake inwall has eight equally distributed drainage troughs, the cross section of described drainage trough is a rectangle, described plug comprises solid upper end and has the bottom of inner chamber, the upper end of this plug and bottom are integrated, the cross section of described plug bottom inner chamber is the flat nose head dummy, described plug is filled in the inside of described loam cake, the end face of described plug upper end is the plane and forms hermetically-sealed construction with the upper port of described loam cake, the bottom of described plug bottom has a step, this step places on the corresponding step in described plinth upper surface, there is a breach side of described plug upper end, this breach is curved, the lower end of described plinth is provided with one and has the female Luer of interior tube chamber, the interior tube chamber bottom of described female Luer is provided with a pod apertures perpendicular to axial direction, this pod apertures makes the interior tube chamber of described female Luer and the drainage trough of described loam cake form path, the upper surface of described plinth has two passages of symmetrical distribution, this passage makes the inner chamber of described plug bottom communicate with the external world, and it is fan-shaped that the cross section of described passage all is.
2. Needleless dosing positive pressure connector according to claim 1 is characterized in that described loam cake and plinth are made by makrolon material.
3. Needleless dosing positive pressure connector according to claim 1 is characterized in that described plug is made by the silica gel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102238711A CN101879339B (en) | 2010-07-12 | 2010-07-12 | Needleless dosing positive pressure connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102238711A CN101879339B (en) | 2010-07-12 | 2010-07-12 | Needleless dosing positive pressure connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101879339A true CN101879339A (en) | 2010-11-10 |
| CN101879339B CN101879339B (en) | 2011-10-12 |
Family
ID=43051565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102238711A Active CN101879339B (en) | 2010-07-12 | 2010-07-12 | Needleless dosing positive pressure connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101879339B (en) |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071200A (en) * | 2013-01-29 | 2013-05-01 | 苏州林华医疗器械有限公司 | Positive-pressure needle-free connecting piece |
| CN103272302A (en) * | 2013-05-15 | 2013-09-04 | 浙江康泰医疗器械有限公司 | Novel positive-pressure joint |
| CN103285450A (en) * | 2013-03-25 | 2013-09-11 | 南通恒泰医疗器材有限公司 | Multifunctional indwelling needle |
| CN103418048A (en) * | 2012-05-24 | 2013-12-04 | 美昕医疗器械（上海）有限公司 | Needle-free joint |
| CN103599577A (en) * | 2013-12-03 | 2014-02-26 | 上海康德莱企业发展集团医疗器械有限公司 | Needleless medication addition infusion positive pressure connector |
| CN103751878A (en) * | 2014-01-27 | 2014-04-30 | 王亚娟 | Positive-pressure and non-needle connecting piece |
| CN103919680A (en) * | 2013-12-02 | 2014-07-16 | 江阴市鸿萌橡塑制品有限公司 | Combined seal cover for needleless transfusion |
| CN104127934A (en) * | 2014-07-22 | 2014-11-05 | 李宜 | Infusion apparatus special for indwelling catheter |
| CN105148359A (en) * | 2015-07-27 | 2015-12-16 | 昆山安卓精密模具有限公司 | Pressure-resistant needle-free connector |
| CN105307701A (en) * | 2013-06-28 | 2016-02-03 | 朴敬锡 | Medical connector for blood vessel junctions |
| CN105920730A (en) * | 2016-06-30 | 2016-09-07 | 锐嘉（宜兴）科技有限公司 | Needle-free medicine addition connector with screw threads |
| CN105999470A (en) * | 2016-07-02 | 2016-10-12 | 河南驼人贝斯特医疗器械有限公司 | Needleless positive-pressure type indwelling needle |
| CN106110493A (en) * | 2016-07-25 | 2016-11-16 | 江苏华安吉泰医疗器械有限公司 | Needleless barotropic joint |
| CN106267451A (en) * | 2016-08-23 | 2017-01-04 | 徐俊鸽 | A kind of venous detaining needle |
| WO2017016095A1 (en) * | 2015-07-29 | 2017-02-02 | 佳承精工股份有限公司 | Positive pressure needle-free injection t-type connector device |
| WO2017016092A1 (en) * | 2015-07-29 | 2017-02-02 | 佳承精工股份有限公司 | Positive pressure needle-free injection y-type connector device |
| WO2017016094A1 (en) * | 2015-07-29 | 2017-02-02 | 佳承精工股份有限公司 | Positive pressure needle-free injection precision infusion set upper cover device |
| CN107626037A (en) * | 2016-07-18 | 2018-01-26 | 蔡溪进 | Pressure-fired exempts from pin medical connector |
| CN108355239A (en) * | 2013-03-14 | 2018-08-03 | 康尔福盛303公司 | Needleless connector with support part |
| CN108883233A (en) * | 2016-04-15 | 2018-11-23 | 泰尔茂株式会社 | Syringe cylinder and its manufacturing method and pre-encapsulated injector |
| CN109010990A (en) * | 2018-08-28 | 2018-12-18 | 河南曙光汇知康生物科技股份有限公司 | A kind of novel infusion needleless joint |
| CN109567826A (en) * | 2019-01-30 | 2019-04-05 | 天津哈娜好医材有限公司 | Exempt to puncture vacuum blood collection tube and its application method |
| CN110051898A (en) * | 2019-06-10 | 2019-07-26 | 端源医疗科技无锡有限公司 | Trochar is used in disposable dialysis |
| CN114642787A (en) * | 2021-09-10 | 2022-06-21 | 邓三明 | Pressure conversion device and infusion connector |
| CN114796694A (en) * | 2015-10-28 | 2022-07-29 | 康尔福盛303公司 | Closed IV access device with Y-port needleless connector |
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| CN201840715U (en) * | 2010-07-12 | 2011-05-25 | 上海康德莱企业发展集团医疗器械有限公司 | Needle-free medicine adding positive pressure connector |
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| CN1879902A (en) * | 2006-02-22 | 2006-12-20 | 张亚平 | Needle-free closed transfusion adaptor |
| CN101195054A (en) * | 2007-11-21 | 2008-06-11 | 张亚平 | Non-needle positive pressure enclosed transfusion joint valve |
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Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418048A (en) * | 2012-05-24 | 2013-12-04 | 美昕医疗器械（上海）有限公司 | Needle-free joint |
| CN103418048B (en) * | 2012-05-24 | 2015-08-19 | 美昕医疗器械（上海）有限公司 | Needleless joint |
| CN103071200B (en) * | 2013-01-29 | 2014-02-26 | 苏州林华医疗器械有限公司 | Positive-pressure needle-free connecting piece |
| CN103071200A (en) * | 2013-01-29 | 2013-05-01 | 苏州林华医疗器械有限公司 | Positive-pressure needle-free connecting piece |
| CN108355239A (en) * | 2013-03-14 | 2018-08-03 | 康尔福盛303公司 | Needleless connector with support part |
| CN103285450A (en) * | 2013-03-25 | 2013-09-11 | 南通恒泰医疗器材有限公司 | Multifunctional indwelling needle |
| CN103272302A (en) * | 2013-05-15 | 2013-09-04 | 浙江康泰医疗器械有限公司 | Novel positive-pressure joint |
| CN105307701A (en) * | 2013-06-28 | 2016-02-03 | 朴敬锡 | Medical connector for blood vessel junctions |
| CN103919680B (en) * | 2013-12-02 | 2016-01-20 | 江阴市鸿萌橡塑制品有限公司 | A kind of no-needle transfusion combined sealed cap |
| CN103919680A (en) * | 2013-12-02 | 2014-07-16 | 江阴市鸿萌橡塑制品有限公司 | Combined seal cover for needleless transfusion |
| CN103599577A (en) * | 2013-12-03 | 2014-02-26 | 上海康德莱企业发展集团医疗器械有限公司 | Needleless medication addition infusion positive pressure connector |
| CN103751878A (en) * | 2014-01-27 | 2014-04-30 | 王亚娟 | Positive-pressure and non-needle connecting piece |
| CN103751878B (en) * | 2014-01-27 | 2016-03-16 | 王亚娟 | Positive pressure needle-free connector |
| CN104127934A (en) * | 2014-07-22 | 2014-11-05 | 李宜 | Infusion apparatus special for indwelling catheter |
| CN105148359A (en) * | 2015-07-27 | 2015-12-16 | 昆山安卓精密模具有限公司 | Pressure-resistant needle-free connector |
| WO2017016095A1 (en) * | 2015-07-29 | 2017-02-02 | 佳承精工股份有限公司 | Positive pressure needle-free injection t-type connector device |
| WO2017016092A1 (en) * | 2015-07-29 | 2017-02-02 | 佳承精工股份有限公司 | Positive pressure needle-free injection y-type connector device |
| WO2017016094A1 (en) * | 2015-07-29 | 2017-02-02 | 佳承精工股份有限公司 | Positive pressure needle-free injection precision infusion set upper cover device |
| CN114796694A (en) * | 2015-10-28 | 2022-07-29 | 康尔福盛303公司 | Closed IV access device with Y-port needleless connector |
| CN108883233A (en) * | 2016-04-15 | 2018-11-23 | 泰尔茂株式会社 | Syringe cylinder and its manufacturing method and pre-encapsulated injector |
| US11554220B2 (en) | 2016-04-15 | 2023-01-17 | Terumo Kabushiki Kaisha | Syringe barrel, method for manufacturing same, and pre-filled syringe |
| CN108883233B (en) * | 2016-04-15 | 2021-10-01 | 泰尔茂株式会社 | Syringe barrel, method for producing same, and prefilled syringe |
| CN105920730A (en) * | 2016-06-30 | 2016-09-07 | 锐嘉（宜兴）科技有限公司 | Needle-free medicine addition connector with screw threads |
| CN105999470A (en) * | 2016-07-02 | 2016-10-12 | 河南驼人贝斯特医疗器械有限公司 | Needleless positive-pressure type indwelling needle |
| CN107626037A (en) * | 2016-07-18 | 2018-01-26 | 蔡溪进 | Pressure-fired exempts from pin medical connector |
| CN106110493A (en) * | 2016-07-25 | 2016-11-16 | 江苏华安吉泰医疗器械有限公司 | Needleless barotropic joint |
| CN106267451A (en) * | 2016-08-23 | 2017-01-04 | 徐俊鸽 | A kind of venous detaining needle |
| CN109010990A (en) * | 2018-08-28 | 2018-12-18 | 河南曙光汇知康生物科技股份有限公司 | A kind of novel infusion needleless joint |
| CN109567826A (en) * | 2019-01-30 | 2019-04-05 | 天津哈娜好医材有限公司 | Exempt to puncture vacuum blood collection tube and its application method |
| CN110051898A (en) * | 2019-06-10 | 2019-07-26 | 端源医疗科技无锡有限公司 | Trochar is used in disposable dialysis |
| CN110051898B (en) * | 2019-06-10 | 2024-01-26 | 端源医疗科技无锡有限公司 | Disposable trocar for dialysis |
| CN114642787A (en) * | 2021-09-10 | 2022-06-21 | 邓三明 | Pressure conversion device and infusion connector |
| CN114642787B (en) * | 2021-09-10 | 2023-07-28 | 邓三明 | Pressure conversion device and infusion connection joint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101879339B (en) | 2011-10-12 |
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