CN203749920U - Positive-pressure needleless connector - Google Patents
Positive-pressure needleless connector Download PDFInfo
- Publication number
- CN203749920U CN203749920U CN201420051088.5U CN201420051088U CN203749920U CN 203749920 U CN203749920 U CN 203749920U CN 201420051088 U CN201420051088 U CN 201420051088U CN 203749920 U CN203749920 U CN 203749920U
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- CN
- China
- Prior art keywords
- positive pressure
- shell
- pressure devices
- joint
- positive
- 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.)
- Expired - Fee Related
Links
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 238000001802 infusion Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 210000003205 muscle Anatomy 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 210000004369 blood Anatomy 0.000 abstract description 5
- 239000008280 blood Substances 0.000 abstract description 5
- 239000003814 drug Substances 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 4
- 229920002725 thermoplastic elastomer Polymers 0.000 description 4
- 230000000844 anti-bacterial effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 208000007536 Thrombosis Diseases 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000012858 resilient material Substances 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003677 hemocyte Anatomy 0.000 description 1
- 229940000351 hemocyte Drugs 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004531 microgranule Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a positive-pressure needleless connector. The positive-pressure needleless connector comprises a hollow inner cavity shell, a positive pressure device is contained in an inner cavity of the shell, the upper end of the positive pressure device and an inner hole of the upper end of the shell form a seal structure, the lower end of the positive pressure device is provided with an inner cavity and an opening, the lateral side of the upper end of the positive pressure device is provided with an embracing type eccentric hollow notch, the lower end of the positive pressure device is hermetically connected with a joint, the inner cavity of the positive pressure device is communicated with the outside through the joint provided with a liquid outlet, and the wall of the inner cavity of the positive pressure device is gradually thinned from top to bottom. When the positive-pressure needleless connector is open, the positive pressure device is pushed downwards by the external joint, a deformation space is formed when the upper end of the positive pressure device reaches to a 4-8mm depth of the shell, the inner wall of the shell forms a flow guide passage, and liquid medicine flows through the liquid outlet through the inner wall of the shell to realize transfusion. The joint is connected with an open transfusion passage to avoid harms caused by use of a steel needle and avoid blood return, and the positive-pressure needleless connector has the advantages of simple structural design, convenience for production and manufacturing, reduction of production cost and the like.
Description
Technical field
This utility model belongs to infusion apparatus field, relates in particular to a kind of positive pressure needle-free connector.
Background technology
Positive pressure connector is a kind of infusion connector of Needleless seal, because it produces malleation extracting syringe or tube for transfusion moment, have simple to operate, avoid pricking wound, effectively reduce blood back plugging and occur, extend the advantages such as indwelling catheter time, be usually used in connecting Vein Tube.A kind of Needleless dosing positive pressure connector is disclosed in Chinese patent CN101879339B, start the unlatching of plug by female Luer, thereby realize the liquid flow of single direction, to avoid due to syringe needle the puncture microgranule that may bring, the pollution of micro-bits, in the time that syringe is pulled up, this positive pressure connector can produce a malleation, automatically makes the liquid in plug push ahead, to avoid blood backflow to form thrombosis in remaining needle, thereby prevent the obstruction of remaining needle.But in practical application, as contained macromolecular organizational structure in the liquid of carrying, as blood, guiding gutter easy scuffing hemocyte is set, thereby impact transfusion curative effect.Meanwhile, the setting of guiding gutter also can, at the formation dead angle, inwall place of upper cover, cause the residual of medicine, affects the accuracy of pharmaceutical quantities.Therefore Chinese patent application CN201310033061.3 proposes a kind of positive pressure needle-free connector, has solved above technical problem, but because plug in this application be out of shape at once formation flow channel for liquids in the time that pressurized carries out folding, easily bring antibacterial etc. into and pollute.
Utility model content
In view of the defect that above-mentioned prior art exists, the purpose of this utility model is to propose a kind of positive pressure needle-free connector, can improve infusion flow rate, and transfusion admission passage length is controlled, simple in structure, is convenient to manufacture.
The purpose of this utility model will be achieved by the following technical programs:
Positive pressure needle-free connector, comprise that one has the shell of hollow cavity, in the hollow cavity of described shell, be equipped with a positive pressure devices with solid upper end and hollow bottom, the end face of the upper end of described positive pressure devices and the upper port of described shell form hermetically-sealed construction, the bottom of positive pressure devices has inner chamber and lower ending opening, the side of the upper end of described positive pressure devices is provided with the eccentric breach of an encircling type hollow, the bottom of described positive pressure devices is connected with a joint sealing, and positive pressure devices inner chamber communicates with the external world by joint, on described joint, be provided with the steam vent with positive pressure devices inner chamber UNICOM, the lower end of described joint is provided with liquid outlet, the attenuation gradually from top to bottom of the internal chamber wall wall thickness of described positive pressure devices inner chamber, when positive pressure needle-free connector is during in open mode, positive pressure devices is pushed downwards by external connector, positive pressure devices upper end arrives shell middle part, while thering is deformation space, the upper end of positive pressure devices produces in-plane displancement, outer casing inner wall forms flow-guiding channel, medicinal liquid is through the outer casing inner wall liquid outlet of flowing through, final outflow realized infusion process.
Preferably, the bottom of described positive pressure devices offers cannelure around inner chamber, and the upper end that described cannelure is set in joint forms double-layer seal.
Preferably, the end face of described positive pressure devices upper end protrudes from shell upper end end face and forms arc.
Preferably, the inwall of described shell is provided with at least two muscle positions.
Preferably, the upper port of described shell has the external screw thread being connected with female Luer.
Preferably, the sidewall of described shell is provided with the arm being communicated with the hollow cavity of described shell.
Preferably, described joint is general expression or female Luer.
Preferably, on described joint, be symmetrically arranged with and two steam vents of positive pressure devices inner chamber UNICOM.
Preferably, when described positive pressure devices upper end arrives the shell 4-8mm place degree of depth, positive pressure devices upper end has deformation space in the enclosure, produces parallel position and moves, and realizes path and opens.
Preferably, described positive pressure devices is the medical grade memory resilient material such as silica gel, polyurethane, isoprene, thermoplastic elastomer (TPE).
Outstanding effect of the present utility model is: the positive pressure devices that the hollow cavity of a kind of positive pressure needle-free connector shell of the present utility model arranges, eccentric breach is offered in its upper end, and the chamber wall of positive pressure devices inner chamber attenuation gradually from top to bottom, in the time that external joint pushes, positive pressure devices upper end is in axial planar movement until to shell middle part, it is the runner that positive pressure devices upper end forms medicinal liquid while having activity space, can avoid forming too early runner is brought into extraneous antibacterial dust etc. in transfusion, ensure the cleaning of transfusion, safe and sanitary.
Below just accompanying drawing in conjunction with the embodiments, is described in further detail detailed description of the invention of the present utility model, so that technical solutions of the utility model are easier to understand, grasp.
Brief description of the drawings
Fig. 1 is the structural representation of this utility model embodiment;
Fig. 2 is the cutaway view of this utility model embodiment;
Cutaway view when Fig. 3 is the use of this utility model embodiment.
Detailed description of the invention
Embodiment:
A kind of positive pressure needle-free connector of the present embodiment, as shown in FIG. 1 to 3, comprises the shell 1 with hollow cavity, and the upper port 11 of shell 1 has external screw thread.In the hollow cavity of shell 1, be equipped with the positive pressure devices 2 with solid upper end 21 and hollow bottom 22, the upper end 21 of positive pressure devices 2 and bottom 22 are formed in one.The end face of the upper end 21 of positive pressure devices 2 is arcwall face and forms hermetically-sealed construction with the upper port 11 of shell 1, the side of the upper end 21 of positive pressure devices 2 is provided with the eccentric breach 24 of an encircling type hollow, and this eccentric breach 24 makes positive pressure devices in the time that pressurized is opened, have good stability.
Arranging of the arcwall face of described positive pressure devices 2 ensured its service life, because positive pressure devices is elastic component, upper end is through repeatedly bringing loss after pushing for a long time, lowest part flushes with shell upper port, and the peak of arcwall face can solve the problems such as the incomplete sealing that its follow-up loss brings.
The bottom 22 of described positive pressure devices 2 and a joint 4 are tightly connected, the attenuation gradually from top to bottom of the internal chamber wall wall thickness of described positive pressure devices inner chamber 5, and the distortion that makes positive pressure devices produce rule in the time of distortion, has stable uniformity.Described positive pressure devices upper end external diameter is less than bottom external diameter, and the positive pressure devices shoulder 25 and housing inner seal of the downward end conversion in upper end.The inwall of shell 1 is provided with at least two muscle positions 3, makes in the time that positive pressure devices inner chamber 5 is out of shape, and its inner chamber chamber wall shrinks to internal strain, can prevent positive pressure devices 2 mistake displacement component in the hollow cavity of shell, causes medicine liquid channel smooth not.The sidewall of shell 1 is provided with at least one arm 12 being communicated with the hollow cavity of shell 1.The bottom 22 of described positive pressure devices 2 offers cannelure 23 around inner chamber, and described cannelure 23 is set in the upper end of joint 4, forms double-layer seal by himself elasticity and joint, has cancelled the use of binding agent, also can better be fixed with plinth.Joint can adopt general expression or female Luer.On described joint, be symmetrically arranged with two steam vents 41 with positive pressure devices inner chamber UNICOM.The lower end of described joint offers liquid outlet.Described steam vent 41 is arranged on the both sides of liquid outlet.
When application the present embodiment, as shown in Figure 2 to 3, under free state, the upper end 21 of positive pressure devices 2 seals up the upper port 11 of shell 1, while using with the syringe of straight mouthful or screw socket or other apparatus, compress the upper end 21 of positive pressure devices 2 by its joint 6, due to the wall thickness attenuation gradually from top to bottom of positive pressure devices 2, in the time that pressure transmits toward bottom 22, the air pressure of positive pressure devices inner chamber is contractd to be inwardly out of shape, positive pressure devices 2 upper side adopt eccentric breach, in the time of pressurized, make its side end face all the time along the downward translation of outer casing inner wall, the upper surface of positive pressure devices 2 and the end face of external connector remain close contact, in the time arriving the inner chamber at shell middle part, the position of rocking in the 21You space, upper end of positive pressure devices 2, formed the upper port 11 along shell 1, the inwall of shell 1, to a fluid passage of the interior tube chamber of joint 4.When general positive pressure devices upper end arrives the shell 4-8mm place degree of depth, can carry out formation and the connection of runner, this degree of depth can be controlled by the degree of depth of shell upper end.
Meanwhile, the air in the bottom 22 of positive pressure devices 2 is in communication with the outside aerofluxus by passage 41.Because positive pressure devices 2 has elasticity, after having injected, positive pressure devices 2 expands and resilience reseals the upper port 11 of the shell 1 of the present embodiment, simultaneously due to after sealing, the positive pressure devices 2 of resilience is compressed the air in aforesaid liquid passage, produces malleation, and liquid residual in fluid passage is pushed ahead, prevent blood backflow, avoid forming thrombosis.
Described positive pressure devices 2 adopts medical grade memory resilient material to make, for example, can use the materials such as silica gel, polyurethane, isoprene, thermoplastic elastomer (TPE).
Eccentric breach 24 and the positive pressure devices inner chamber wall thickness of a kind of positive pressure needle-free connector positive pressure devices of the present embodiment diminish gradually, make it in the time of pressurized, positive pressure devices inner chamber 5 places first produce distortion, positive pressure devices upper end 21 is plane all the time along outer casing inner wall to moving down, in the time that positive pressure devices upper end 21 does not also depart from shell upper end, positive pressure devices 2 keeps sealing with shell upper end, has avoided bringing into from the external world antibacterial or dust, make the time or the length that form runner there is controllability, much cleaner health.In conjunction with the muscle position of outer casing inner wall, positive pressure devices inner chamber 5 distortion is subject to certain restrictions, avoid significantly swinging back and forth and cause the circulation of runner inner liquid medicine limited in the enclosure, have simple in structurely, the feature such as be convenient to manufacture and reduce production costs.
This utility model still has numerous embodiments, and all employing equivalents or equivalent transformation and all technical schemes of forming, within all dropping on protection domain of the present utility model.
Claims (9)
1. positive pressure needle-free connector, comprise that one has the shell of hollow cavity, in the hollow cavity of described shell, be equipped with a positive pressure devices with solid upper end and hollow bottom, the end face of the upper end of described positive pressure devices and the upper port of described shell form hermetically-sealed construction, the bottom of positive pressure devices has inner chamber and lower ending opening, it is characterized in that: the side of the upper end of described positive pressure devices is provided with the eccentric breach of an encircling type hollow, the bottom of described positive pressure devices is connected with a joint sealing, and positive pressure devices inner chamber communicates with the external world by joint, on described joint, be provided with the steam vent with positive pressure devices inner chamber UNICOM, the lower end of described joint is provided with liquid outlet, the attenuation gradually from top to bottom of the internal chamber wall wall thickness of described positive pressure devices inner chamber, when positive pressure needle-free connector is during in open mode, positive pressure devices is pushed downwards by external connector, positive pressure devices upper end arrives shell middle part, while thering is deformation space, the upper end of positive pressure devices produces in-plane displancement, outer casing inner wall forms flow-guiding channel, medicinal liquid is through the outer casing inner wall liquid outlet of flowing through, final outflow realized infusion process.
2. positive pressure needle-free connector according to claim 1, is characterized in that: the bottom of described positive pressure devices offers cannelure around inner chamber, and the upper end that described cannelure is set in joint forms double-layer seal.
3. positive pressure needle-free connector according to claim 2, is characterized in that: the end face of described positive pressure devices upper end protrudes from shell upper end end face and forms arc.
4. positive pressure needle-free connector according to claim 3, is characterized in that: the inwall of described shell is provided with at least two muscle positions.
5. positive pressure needle-free connector according to claim 4, is characterized in that: the upper port of described shell has the external screw thread being connected with female Luer.
6. positive pressure needle-free connector according to claim 5, is characterized in that: the sidewall of described shell is provided with the arm being communicated with the hollow cavity of described shell.
7. positive pressure needle-free connector according to claim 6, is characterized in that: described joint is general expression or female Luer.
8. positive pressure needle-free connector according to claim 7, is characterized in that: on described joint, be symmetrically arranged with two steam vents with positive pressure devices inner chamber UNICOM.
9. positive pressure needle-free connector according to claim 8, is characterized in that: when described positive pressure devices upper end arrives the shell 4-8mm place degree of depth, positive pressure devices upper end has deformation space in the enclosure, produces parallel position and moves, and realizes path and opens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420051088.5U CN203749920U (en) | 2014-01-27 | 2014-01-27 | Positive-pressure needleless connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420051088.5U CN203749920U (en) | 2014-01-27 | 2014-01-27 | Positive-pressure needleless connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203749920U true CN203749920U (en) | 2014-08-06 |
Family
ID=51245228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420051088.5U Expired - Fee Related CN203749920U (en) | 2014-01-27 | 2014-01-27 | Positive-pressure needleless connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203749920U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103751878A (en) * | 2014-01-27 | 2014-04-30 | 王亚娟 | Positive-pressure and non-needle connecting piece |
| CN109498890A (en) * | 2018-12-18 | 2019-03-22 | 山东新华安得医疗用品有限公司 | Positive pressure feather valve and no-needle transfusion connector |
-
2014
- 2014-01-27 CN CN201420051088.5U patent/CN203749920U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109498890A (en) * | 2018-12-18 | 2019-03-22 | 山东新华安得医疗用品有限公司 | Positive pressure feather valve and no-needle transfusion connector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20160304 Granted publication date: 20140806 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20160506 Granted publication date: 20140806 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160622 Address after: 215000, No. 3, Xin Lu, Suzhou Industrial Park, Suzhou, Jiangsu Patentee after: SUZHOU LINHUA MEDICAL INSTRUMENT CO., LTD. Address before: The town of Beijing city Shunyi District 101300 big sun Da sun Ge Zhuang Cun Dong Yuan Street No. 15 Patentee before: Wang Yajuan |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20170127 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |