CN201263811Y - Positive-pressure joint for infusion without needle - Google Patents

Positive-pressure joint for infusion without needle Download PDF

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Publication number
CN201263811Y
CN201263811Y CNU200820122640XU CN200820122640U CN201263811Y CN 201263811 Y CN201263811 Y CN 201263811Y CN U200820122640X U CNU200820122640X U CN U200820122640XU CN 200820122640 U CN200820122640 U CN 200820122640U CN 201263811 Y CN201263811 Y CN 201263811Y
Authority
CN
China
Prior art keywords
jointing
slide core
connector
sealing
shell
Prior art date
Application number
CNU200820122640XU
Other languages
Chinese (zh)
Inventor
张辉
魏建虎
蒲忠杰
Original Assignee
乐普(北京)医疗器械股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 乐普(北京)医疗器械股份有限公司 filed Critical 乐普(北京)医疗器械股份有限公司
Priority to CNU200820122640XU priority Critical patent/CN201263811Y/en
Application granted granted Critical
Publication of CN201263811Y publication Critical patent/CN201263811Y/en

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Abstract

The utility model relates to a positive pressure connector used for needless infusion, which comprises an outer shell with a hollow inner part, a connector with a hollow pipe cavity, a movable core with a hollow cavity body and an elastic body. The right end of the connector is provided with a ring-shaped groove which is connected with the outer shell; the movable core is sleeved in the ring-shaped groove; the outer diameter of the end of the movable core near the connector is bigger than that of the end away from the connector; the movable core is in an arc surface from the end near the connector to the end away from the connector; when the movable core is positioned at the original position, the arc surface and the end away from the connector fit close with the inner wall of the outer shell; the elastic body is arranged in the ring-shaped groove, one end contacts with the connector, and the other end contacts with the end of the movable core with a bigger diameter; a channel communicated with the inner cavity body is arranged on the arc surface of the movable core; and the right side of the movable core away from the connector is an oblique surface. The structural design of the positive pressure connector enables the movable core to produce negative pressure during moving toward right, so that blocking an infusion pipe caused by blood return can be avoided during infusion.

Description

A kind of positive pressure connector that is used for the needleless transfusion
Technical field
This utility model relates to medical instruments field, is specifically related to a kind of positive pressure connector that is used for the needleless transfusion that produces malleation in transfusion, prevent the blood backflow.
Background technology
Infusion connector belongs to medical apparatus and instruments, when the patient repeatedly infuses, can use inlying catheter usually, and inlying catheter generally is to enter in the blood circulation of human body, liquid or medicine that this infusion method can allow the very fast absorption of human body import.The connected mode of existing inlying catheter and infusion set generally has two kinds, be respectively that pin infusion model and needleless infusion model are arranged, there is pin infusion model requirement inlying catheter to have the injection joint of puncture silica gel window, the syringe needle that is connected infusion set during transfusion inserts rubber blanket and can infuse, but in the process of repeatedly puncture, sharp transfusion needle point cutting rubber can be taken chip out of, pollutes medicinal liquid, and the patient is caused potential safety hazard.The needleless infusion model is not owing to there is syringe needle to have its safety, replace having the pin infusion model gradually, the general joint of infusion set that adopts of existing needleless infusion model transfusion is connected with inlying catheter, but finish when pulling down the joint of infusion set when infusing, because the effect of negative pressure can make blood be back in the inlying catheter, immobilising blood solidifies easily, and blood coagulation can cause the obstruction of inlying catheter, and next time, transfusion just can't be carried out again.
The utility model content
The purpose of this utility model provides a kind of positive pressure connector that is used for the needleless transfusion, and finishing to pull down in the infusion connector process in transfusion produces malleation, makes medicinal liquid continue to flow into inlying catheter, prevents that blood from refluxing, thereby avoids blood coagulation to stop up inlying catheter.
For achieving the above object, this utility model adopts following technical scheme:
A kind of positive pressure connector that is used for the needleless transfusion comprises the shell of inner hollow and has the jointing of the tube chamber of hollow, the slide core with cavity of hollow, elastomer, wherein,
The jointing right-hand member is provided with cannelure, and shell is connected with the jointing right-hand member;
Slide core is enclosed within the cannelure, slide core near jointing one end external diameter greater than away from jointing one end external diameter, slide core is from being arcwall face between above-mentioned end to end, when slide core is in original position, and described arcwall face and match away from jointing one end and outer casing inner wall;
Elastomer is arranged in the cannelure, and an end contacts with jointing, and an end and slide core are near an end in contact of jointing;
Has the passage that is communicated with internal cavity on the arcwall face of slide core;
The right side away from jointing one end of slide core is the inclined-plane.
Wherein, when slide core is enclosed within the cannelure, with the sealing of first sealing member, seal with second sealing member between outer socket face, between interior socket face away from sealing with the 3rd sealing member between jointing one end and shell.
Wherein, with on the shell that the jointing right-hand member is connected leave perforate.
Wherein, the left end of the tube chamber of described jointing inserts inlying catheter.
Wherein, the jointing left end has a standard Luer circular cone, and described shell right-hand member has the external screw thread that screws mutually with standard Luer joint female thread.
Wherein, described elastomer material therefor can be rustless steel or medical elastic material.
Any material therefor is silicone rubber or medical flexible material in wherein said first sealing member, second sealing member and the 3rd sealing member.
The positive pressure connector that is used for the needleless transfusion that utilizes this utility model to provide, at one end connect inlying catheter, when the other end is infused in the promotion of infusion connector, it provides leading to of liquid to produce malleation when transfusion finishes to take off infusion connector, the sealing liquid passage has avoided blood to reflux and the problem of obstruction tube for transfusion simultaneously.
Description of drawings
Structural representation when the positive pressure connector that Fig. 1 is used for needleless transfusion for this utility model does not connect infusion connector;
Fig. 2 is used for the structural representation of positive pressure connector after connecting infusion connector of needleless transfusion for this utility model.
Among the figure: 1, jointing; 1a, buckle; 1b, tube chamber; 2, elastomer; 3, shell; 3a, perforate; 3b; Inner chamber; 4, first sealing member; 5, slide core; 5a, cavity; 5b, passage; 6, second sealing member; 7, the 3rd sealing member; 8, infusion connector; 8a, first arrow; 8b, second arrow; 8c, the 3rd arrow.
The specific embodiment
The positive pressure connector that is used for the needleless transfusion that the utility model proposes is described as follows in conjunction with the accompanying drawings and embodiments.
The positive pressure connector that is used for needleless transfusion in the present embodiment, both states after the infusion connector of connection being arranged and being connected infusion connector, the state of the slide core when not connecting infusion connector are called and are in original position.
As shown in Figure 1, the positive pressure connector that is used for the needleless transfusion in the present embodiment, comprise the shell 3 of inner hollow and place jointing 1, slide core 5, the elastomer 2 of the tube chamber 1b in the shell with cavity 5a of hollow with hollow, jointing 1 right-hand member is provided with cannelure, shell 3 is connected with jointing 1 right-hand member, according to shown in Figure 1, slide core 5 slides above-mentioned cannelure and jointing 1 are connected the space that the back forms with shell 1 in; Slide core 5 is enclosed within the cannelure, the inner chamber 5a of slide core 5 is communicated with the tube chamber 1b of jointing 1, slide core slides in cannelure, the external diameter of slide core 5 changes, slide core 5 near jointing 1 one end external diameters greater than away from jointing 1 one end external diameters, slide core 5 from above-mentioned near jointing 1 one ends to away from forming cambered surface jointing 1 one ends, therefore its external diameter falls between, when slide core 5 is in original position, described arcwall face and match away from jointing 1 one ends and shell 3 inwalls guarantees sealing; Elastomer 2 is arranged in the cannelure, and an end contacts with jointing 1, and an end and slide core 5 also is in the original position state near an end in contact of jointings 1 when slide core 5 is in original position, at slide core 5 along being compressed under the slip of jointing 1 outer wall; Has the passage 5b that is communicated with internal cavity 5a on the arcwall face of slide core 5; The right side away from jointing 1 one ends of slide core 5 is the inclined-plane, when the purpose that this inclined-plane is set is the inside promotion of assurance slide core 5, the 3rd outer wall inclined-plane outwards partly with on original position state lower casing 3 inwalls forms a groove with second outer wall and the 3rd intersection that outer wall contacts, and enters for liquid.
In the present embodiment, when slide core 5 is enclosed within the cannelure, with 4 sealings of first sealing member, seal with second sealing member 6 between outer socket face between interior socket face, seal with the 3rd sealing member 7 away from 3 on jointing 1 one ends and shell.
With leave perforate 3a on the shell 3 that jointing 1 right-hand member is connected, in the sliding compression cannelure, during air, reduce pressure at slide core.
The left end of jointing 1 interior lumen 1b inserts inlying catheter during use, has a standard Luer circular cone, and shell 3 right-hand members have the external screw thread that screws mutually with standard Luer joint female thread.The inwall of the cavity 5a of slide core 5 is a long column shape, and the outer wall that stretches into the jointing 1 in the cavity 5a is a long column shape.Jointing 1 left end combines with shell 3 with buckle 1a form, and the two is not rocked in conjunction with closely having.Elastomer 2 material therefors can be rustless steel or medical elastic material.Any material therefor is silicone rubber or medical flexible material in first sealing member 4, second sealing member 6 and the 3rd sealing member 7.
The positive pressure connector purpose that is used for the needleless transfusion in the present embodiment is to provide the passage of liquid when transfusion, produce malleation when transfusion finishes to take off infusion connector, simultaneously the sealing liquid passage.
As shown in Figure 1, situation when the positive pressure connector that this utility model is used for needleless transfusion is not infused, its jointing 1 left end connects medical apparatus and instruments (not drawing on the figure) such as inlying catheter, interior lumen 1b left end is communicated with the indwelling conducting, cavity 5a in tube chamber 1b right-hand member and the slide core 5 is communicated with, and cavity 5a is communicated with passage 5b on second outer wall.Because the sealing function of first sealing member, second sealing member, the 3rd sealing member, and second outer wall matches with outer casing inner wall when being in original position, makes the fluid passage in the positive pressure connector and ambient atmosphere isolation and no liquid leakage when not infusing.
As shown in Figure 2, when infusion connector 8 inserts shell 3 from the positive pressure connector right side, by promoting the inclined-plane of the 3rd outer wall right-hand member, make slide core 5 be moved to the left to shown position, because slide core 5 moves to left, moving to the inclined-plane outwards on part and original position state lower casing 3 inwalls during with second outer wall and groove of the 3rd intersection that outer wall contact formation, form the inner chamber 3b of receiving fluids between first outer wall of slide core 5 and second outer wall and the shell 3, flowing of liquid this moment as the first arrow 8a among the figure, the second arrow 8b, shown in the 3rd arrow 8c, promptly flow among the cavity 5b of slide core 5, flow into the tube chamber 1b of jointing 1 inside again by cavity 5b by passage 5b.
When pulling down infusion connector 8, slide core 5 moves right under the promotion of elastomer 2, get back to position as shown in Figure 1, in this process, the inner chamber 3b of receiving fluids reduces gradually, until being zero, because the existence of first sealing member 4, second sealing member 6 and the 3rd sealing member 7, make between jointing 1 and the slide core 5, all sealings between slide core 5 and the shell 3, so inner chamber 3b institute receiving fluids can only be flowed out by passage 5b, cavity 5a and tube chamber 1b, promptly reach the purpose that produces malleation, avoided blood to reflux and the problem of obstruction tube for transfusion.
Above embodiment only is used to illustrate this utility model; and be not to restriction of the present utility model; the those of ordinary skill in relevant technologies field; under the situation that does not break away from spirit and scope of the present utility model; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be defined by the claims.

Claims (7)

1, a kind of positive pressure connector that is used for the needleless transfusion is characterized in that, comprise the shell (3) of inner hollow and have the jointing (1) of the tube chamber (1b) of hollow, slide core (5), elastomer (2) with cavity (5a) of hollow,
Jointing (1) right-hand member is provided with cannelure, and shell (3) is connected with jointing (1) right-hand member;
Slide core (5) is enclosed within the cannelure, slide core (5) near jointing (1) one end external diameter greater than away from jointing (1) one end external diameter, slide core (5) is between above-mentioned end to end being arcwall face, slide core (5) is when being in original position, described arcwall face and match away from jointing (1) one end and shell (3) inwall;
Elastomer (2) is arranged in the cannelure, and an end contacts with jointing (1), and an end and slide core (5) are near an end in contact of jointing (1);
Has the passage (5b) that is communicated with internal cavity (5a) on the arcwall face of slide core (5);
The right side away from jointing (1) one end of slide core (5) is the inclined-plane.
2, the positive pressure connector that is used for the needleless transfusion as claimed in claim 1, it is characterized in that, when slide core (5) is enclosed within the cannelure, seal with first sealing member (4) between interior socket face, seal with second sealing member (6) between outer socket face, away from sealing with the 3rd sealing member (7) between jointing (1) one end and shell (3).
3, the positive pressure connector that is used for needleless transfusion as claimed in claim 1 is characterized in that, and leaves perforate (3a) on the shell (3) that jointing (1) right-hand member is connected.
4, the positive pressure connector that is used for the needleless transfusion as claimed in claim 1 is characterized in that, the left end of the tube chamber (1b) of described jointing (1) inserts inlying catheter.
5, the positive pressure connector that is used for the needleless transfusion as claimed in claim 1 is characterized in that jointing (1) left end has a standard Luer circular cone, and described shell (3) right-hand member has the external screw thread that screws mutually with standard Luer joint female thread.
6, the positive pressure connector that is used for the needleless transfusion as claimed in claim 1 is characterized in that described elastomer (2) material therefor can be rustless steel or medical elastic material.
7, the positive pressure connector that is used for the needleless transfusion as claimed in claim 2 is characterized in that any material therefor is silicone rubber or medical flexible material in described first sealing member (4), second sealing member (6) and the 3rd sealing member (7).
CNU200820122640XU 2008-09-22 2008-09-22 Positive-pressure joint for infusion without needle CN201263811Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU200820122640XU CN201263811Y (en) 2008-09-22 2008-09-22 Positive-pressure joint for infusion without needle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU200820122640XU CN201263811Y (en) 2008-09-22 2008-09-22 Positive-pressure joint for infusion without needle

Publications (1)

Publication Number Publication Date
CN201263811Y true CN201263811Y (en) 2009-07-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101879339A (en) * 2010-07-12 2010-11-10 上海康德莱企业发展集团医疗器械有限公司 Needleless dosing positive pressure connector
CN103272302A (en) * 2013-05-15 2013-09-04 浙江康泰医疗器械有限公司 Novel positive-pressure joint
WO2014161410A1 (en) * 2013-04-01 2014-10-09 江苏磐宇科技有限公司 Needleless positive pressure connector
WO2014169429A1 (en) * 2013-04-16 2014-10-23 福建省百仕韦医用高分子股份有限公司 Medical infusion connector for connecting to extracorporeal catheter
WO2014194541A1 (en) * 2013-06-03 2014-12-11 南通恒泰医疗器材有限公司 Disposable outer periphery sleeve infusion device
CN104815365A (en) * 2015-05-20 2015-08-05 宁湘龙 Medical needleless positive pressure joint
CN107525692A (en) * 2017-08-28 2017-12-29 朱礼阳 Liquid management antibacterial sampler
CN108721772A (en) * 2017-04-14 2018-11-02 怡安医疗器材股份有限公司 Needleless attachment device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101879339A (en) * 2010-07-12 2010-11-10 上海康德莱企业发展集团医疗器械有限公司 Needleless dosing positive pressure connector
CN101879339B (en) * 2010-07-12 2011-10-12 上海康德莱企业发展集团医疗器械有限公司 Needleless dosing positive pressure connector
WO2014161410A1 (en) * 2013-04-01 2014-10-09 江苏磐宇科技有限公司 Needleless positive pressure connector
WO2014169429A1 (en) * 2013-04-16 2014-10-23 福建省百仕韦医用高分子股份有限公司 Medical infusion connector for connecting to extracorporeal catheter
CN103272302A (en) * 2013-05-15 2013-09-04 浙江康泰医疗器械有限公司 Novel positive-pressure joint
WO2014194541A1 (en) * 2013-06-03 2014-12-11 南通恒泰医疗器材有限公司 Disposable outer periphery sleeve infusion device
CN104815365A (en) * 2015-05-20 2015-08-05 宁湘龙 Medical needleless positive pressure joint
CN108721772A (en) * 2017-04-14 2018-11-02 怡安医疗器材股份有限公司 Needleless attachment device
CN107525692A (en) * 2017-08-28 2017-12-29 朱礼阳 Liquid management antibacterial sampler

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CX01 Expiry of patent term

Granted publication date: 20090701

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