CN109432541A - A kind of infusion connector - Google Patents
A kind of infusion connector Download PDFInfo
- Publication number
- CN109432541A CN109432541A CN201811368706.8A CN201811368706A CN109432541A CN 109432541 A CN109432541 A CN 109432541A CN 201811368706 A CN201811368706 A CN 201811368706A CN 109432541 A CN109432541 A CN 109432541A
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- China
- Prior art keywords
- liquid
- infusion connector
- pedestal
- active connection
- feed flow
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/10—Tube connectors; Tube couplings
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- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Pulmonology (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The embodiment of the present invention provides a kind of infusion connector, comprising: tip side, pedestal, elastomeric element, active connection and switch block: the tip side is installed on the pedestal, and the tip side is equipped with liquid inlet；The pedestal and tip side form a valve chamber, and the pedestal is equipped with liquid outlet；The elastomeric element is set in the valve chamber, and by the valve chamber be divided into can storing liquid and variable volume solution cavity and always with the separate cavities of fluid isolation；The active connection is set in the solution cavity and can move between first position is moved to the second position；The switch block and the active connection are coupled for closing or opening the liquid inlet.After accessing feed flow plug, the volume of solution cavity increases, and after taking out feed flow plug, the volume of solution cavity reduces；Wherein, the volume of solution cavity changes so that the residual liquid in the infusion connector occurs flowing and forms normal pressure or zero pressure in the liquid outlet.
Description
Technical field
The present invention relates to infusion connectors, more particularly to transfusion catheter and syringe is clinically cooperated to use, can prevent medicine
The infusion connector of liquid reflux and blood back.
Background technique
Currently, multiselect is stayed with vein when needing to be infused or injected prolonged and repeatedly during infusion
Set needle or inlying catheter.Threeway conduit is usually connected on these venous detaining needles or inlying catheter, is commonly provided on threeway conduit
Standard Luer (Luer) connector or calparine cap, to meet the clinical requirement of a variety of infusions.But above-mentioned medical instrument makes in clinic
In, have the defects that certain: the use of female Luer on tee tube needs to carry out partly sterilised every time, and to use note
It penetrates needle to be punctured, thus increases work load and operational risk to medical and nursing work；The use of calparine cap then needs medical care people
Member injects heparin in calparine cap or physiological saline carries out tube sealing, prevent blood clotting from forming thrombus after filling medical fluid, this
Equally burden is brought to clinical manipulation.In addition, the application of calparine cap is it is also possible to cause a small amount of air to enter blood circulation system,
There are risks.Meanwhile after the completion of above-mentioned two classes instrument can not all solve infusion, production when due to drawing back injection needle or needleless joint
Raw negative pressure causes blood of human body to pass back into indwelling hose, and needle tubing is blocked in blood clotting, prevents infusion next time and generates
Severe compromise.
To prevent above-mentioned malpractice, people design positive-pressure one-way valve and are applied to during clinical transfusion.It is public
The positive-pressure one-way valve known mostly uses spring to will cause sometimes as elastic element since active force of the spring to valve body is larger
The damage of valve body.In addition, the spring of metal material is relatively also easy to produce elastic fatigue, it can not thoroughly sterilize, be brought to infusion process
Security risk.It needs to be arranged polymorphic structure in other examples, such as increases air flue to pass through the body of gas regulation element
Product is realized to form normal pressure, or by setting two-way fluid pipeline.The processing of these polymorphic structures is complicated, increase manufacture and
The difficulty of assembly.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that a kind of infusion connector is provided, after completing infusion, by
Infusion connector is formed in fluid output port prevents medical fluid the reflux even normal pressure or zero pressure of blood back, in addition, the infusion connector
Structure is simple, can accurately control normal pressure.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of infusion connectors, comprising: tip side, pedestal,
Elastomeric element, active connection and switch block:
The tip side is installed on the pedestal, and the tip side is equipped with liquid inlet；The pedestal and tip side form a valve
Chamber, the pedestal are equipped with liquid outlet；The elastomeric element is set in the valve chamber, and the valve chamber is divided into and can be stored
Liquid and the solution cavity of variable volume and always with the separate cavities of fluid isolation；The active connection is set to the solution
It is intracavitary and can be moved between first position and the second position；The switch block and the active connection mating for close or
Open the liquid inlet；
After accessing the feed flow plug, the switch block opening opens the liquid inlet, and the active connection moves
It moves to the second position, the volume of the solution cavity increases, while liquid is flowed to from the feed flow plug through the solution cavity
The liquid outlet；After taking out the feed flow plug, the active connection is under the action of the elastomeric element from described
The second position is moved to the first position, and the switch block closes and makes to state liquid inlet closing, the appearance of the solution cavity
Product reduces；Wherein, the volume of the solution cavity changes so that the residual liquid in the infusion connector occurs flowing and described
Liquid outlet forms normal pressure or zero pressure.
Wherein, the active connection by the solution cavity be divided into the first variable spaces towards the liquid inlet with
And the second variable spaces towards the liquid outlet；After accessing the feed flow plug, the switch block opening makes described
Liquid inlet is opened, and the active connection is in the second position, and the first variable spaces volume becomes larger, and liquid is from the confession
Liquid plug enters first variable spaces and flows to the liquid outlet through second variable spaces；
After taking out the feed flow plug, the active connection is moved under the action of the elastomeric element from the second position
It moves to the first position, the switch block closes the liquid inlet；Wherein, the volume of first variable spaces becomes
Small, the second variable spaces volume becomes larger, and the residual liquid in the solution cavity is according to from the liquid inlet to the liquid
The direction flowing of body outlet, so that the liquid outlet forms normal pressure or zero pressure.
Further, the elastomeric element includes elastic inner cavity for that can accommodate the active connection and can make
The variation of the elastic wall of the elasticity cavity volume variation, the elasticity cavity volume can make first variable spaces and described
The volume of second variable spaces changes.
Further, the active connection include one can push the elastomeric element occur elastically-deformable pedestal and
One, which is set to the pedestal, can be coupled with the feed flow plug and form liquid between the liquid inlet and the liquid outlet
The column tube of access.
Further, the elastomeric element further includes the support portion for being used to support the pedestal.
Further, at least one circulation passage is equipped between first variable spaces and second variable spaces.
Further, the circulation passage is to be set to the pedestal or be set on the elastic wall.
Further, the liquid outlet includes an outlet tube for extending to the valve chamber.
Further, the switch block be set in the active connection can deformable sleeve.
Further, it is described can deformable sleeve be sheathed on the tubing string；When not accessing the feed flow plug, it is described can shape
Become casing by the column tube be enclosed in it is described can in deformable sleeve, it is described at this time can deformable sleeve be in the third place, the work
Follower link is in the first position；When accessing the feed flow plug, the column tube can be released from described in deformable sleeve
And be coupled with the feed flow plug, it is described at this time can deformable sleeve be in the 4th position, the active connection is in described the
Two positions.
Further, it is described can deformable sleeve be equipped with a closed top and accommodate the column tube and with the pedestal
The pipe end of engagement.
Further, the top is equipped with a word or cross elastic opening.
Further, the top is equipped with the first guidance cavity for guiding the column tube.
Further, the bottom of the pipe end is equipped with a seat end engaged with the pedestal.
Further, the tip side be equipped with one for accommodate it is deformed it is described can deformable sleeve accommodating cavity；When slotting
When entering the feed flow plug, the feed flow plug will described in can deformable sleeve be pushed into the accommodating cavity, it is described can be at deformable sleeve
In the 4th position, and it is described can deformable sleeve deformation occurs, the column tube from it is described can release in deformable sleeve and with institute
The mating of feed flow plug is stated, the active connection is in the second position.
Further, the accommodating cavity be equipped with for will described in can deformable sleeve guide to described the from the 4th position
Second guidance cavity of three positions.
Further, it is described can deformable sleeve be made of elastic flexible material.
Further, the inner wall of the pedestal is provided with the first fixed part that can fix the elastomeric element.
Further, the elastomeric element is equipped with the second fixed part of a fixed part mating.
Further, the pedestal is fixed on the support portion.
Further, the infusion connector further includes at least one side bye-pass.
As shown from the above technical solution, infusion connector provided by the invention passes through active connection for the elasticity of variable volume
Component is divided into the first variable spaces and the second variable spaces, feed flow plug taking-up after, the first variable spaces volume reduce with
Liquid remaining in infusion connector is set to flow to the second variable spaces to form normal pressure or zero pressure at liquid outlet end, just
Pressure and zero pressure depend on the volume variation of the first variable spaces and the second variable spaces.It can be realized more in the prior art
The infusion connector of unidirectional positive pressure, infusion connector structure provided in an embodiment of the present invention is simple, and metal material is not present, need not also adopt
The variation of liquid volume in infusion connector is realized with special gas circuit, while being also easy production and assembly, and can be accurate
The size for controlling normal pressure has higher stability and safety under the premise of realizing accuracy.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without any creative labor, according to
These attached drawings obtain other attached drawings and still fall within scope of the invention.
Fig. 1 is a kind of appearance diagram of infusion connector provided in an embodiment of the present invention.
Fig. 2 is a kind of part schematic diagram of infusion connector provided in an embodiment of the present invention.
Fig. 3 is the structural schematic diagram of valve chamber in the embodiment of the present invention.
Fig. 4 is the mounting structure sectional view of elastomeric element in the embodiment of the present invention.
Fig. 5 is active connection mounting structure sectional view in the embodiment of the present invention.
Fig. 6 is a kind of axial section of the infusion connector provided in an embodiment of the present invention when not accessing feed flow plug.
Fig. 7 is a kind of cross-sectional view of the part of infusion connector provided in an embodiment of the present invention.
Fig. 8 is a kind of axial section of the infusion connector provided in an embodiment of the present invention after accessing feed flow plug.
Fig. 9 is the appearance diagram of another infusion connector provided in an embodiment of the present invention.
Figure 10 is the part schematic diagram of another infusion connector provided in an embodiment of the present invention.
Figure 11 be another infusion connector provided in an embodiment of the present invention can deformable sleeve structural schematic diagram.
Figure 12 is to use a kind of appearance diagram of the infusion equipment of infusion connector provided in an embodiment of the present invention.
Figure 13 is the structural schematic diagram of another embodiment of infusion connector provided by the invention.
Specific embodiment
The explanation of following embodiment be with reference to attached drawing, can be to the specific embodiment implemented to the formula example present invention.
The direction term that the present invention is previously mentioned, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outside", " side " etc.,
It is only the direction with reference to annexed drawings.Therefore, the direction term used is to illustrate and understand the present invention, rather than to limit
The present invention.
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.
As Figure 1-Figure 8, Fig. 1 is a kind of appearance diagram of infusion connector provided in an embodiment of the present invention, and Fig. 2 is this
A kind of part schematic diagram for infusion connector that inventive embodiments provide.The infusion connector of the present embodiment clinically cooperates transfusion catheter
It is used with syringe.
As Figure 1-Figure 8, in the present embodiment, infusion connector 100, comprising: tip side 110, pedestal 150, elastomeric element
140, active connection 130 and switch block 120.
Tip side 110 is installed on pedestal 150, and tip side 110 is equipped with liquid inlet 111；110 shape of pedestal 150 and tip side
At a valve chamber 160, pedestal 150 is equipped with liquid outlet 153；Elastomeric element 140 is set in valve chamber 160, and valve chamber 160 is separated
For can storing liquid solution cavity 161 and always with the separate cavities of fluid isolation 162；Active connection 130 is set to solution
It can move in chamber 161 and between first position and the second position；Switch block 120 is coupled with active connection 130 for closing
Or open liquid inlet；
Active connection 120 is used for after feed flow plug 210 accesses liquid inlet 111, and active connection 130 is moved from first position
It moves to the second position so that elastic deformation, while shape between active connection 130 and feed flow plug 210 occur for elastomeric element 140
At fluid passage；Switch block 120 is used for the sealing liquid entrance 111 when not accessing feed flow plug 210 and is accessing feed flow
Liquid inlet 111 is opened when plug 210；
Specifically, switch block opening opens liquid inlet 111, at active connection 130 after accessing feed flow plug 210
In the second position, the volume of solution cavity 161 increases, and liquid flows to liquid outlet 153 through solution cavity 161 from feed flow plug 210；When
After taking out feed flow plug 210, active connection 130 is moved to first position from the second position under the action of elastomeric element 140,
The volume of 120 sealing liquid entrance 111 of switch block, solution cavity 161 reduces；Wherein, the volume of solution cavity 161 changes so that defeated
Residual liquid in liquid connector 100 occurs flowing and forms normal pressure or zero pressure in liquid outlet 153.Specifically, infusion connects
Residual liquid or portion of residual liquid in first 100 are pressed to be flowed towards the direction of liquid outlet 153.
More specifically, tip side 110 is installed on pedestal 150 referring to figs. 2 and 3, and tip side 110 can be equipped with liquid with tip side
Body entrance 111；Pedestal 150 and tip side 110 form a valve chamber 160, shown in Figure 3, and Fig. 3 is valve chamber in the embodiment of the present invention
160 structural schematic diagram.Specifically, the shell of pedestal 150 and tip side 110 forms a valve chamber 160 in infusion connector 100.
Tip side 110 and pedestal 150 can be as shown in Figures 2 and 3, and 150 shape of pedestal is greater than the shape of tip side 110, i.e. tip side
The volume of 110 small volume, pedestal 150 is larger, and tip side 110 is embedded in pedestal 150 and forms liquid sealed connection.At it
In his mode, the shape of tip side 110 is greater than or equal to the size of pedestal 150, and the two can be close using the liquid of other forms
The modes such as envelope connection, such as stickup, die cast or ultrasonic bonding.Pedestal 150 is equipped with liquid outlet 153.
- Fig. 6 referring to fig. 4, Fig. 4 are the mounting structure sectional view of elastomeric element in the embodiment of the present invention, and Fig. 5 is that the present invention is real
Active connection mounting structure sectional view in example is applied, Fig. 6 is a kind of axial section of infusion connector provided in an embodiment of the present invention
Figure.As Figure 3-Figure 4, elastomeric element 140 is set in valve chamber 160, and valve chamber 160 is divided by elastomeric element 140 to be stored
The solution cavity 161 of liquid and always with the separate cavities of fluid isolation 162, elastomeric element 140 occur elastic deformation when, solution cavity
161 volume changes therewith, and it is preferable to use flexible elastic materials to be made for elastomeric element 140, such as silica gel, plastic cement, rubber
Equal materials, certainly, other than above-mentioned citing, the flexible elastic material that can also often be had using other.
As shown in figure 5, active connection 130 is installed in solution cavity 161, referring to Fig. 6, active connection 130 will be described
Solution cavity is divided into towards 111 first variable spaces 163 of liquid inlet and towards liquid outlet 153 and can be connected to the liquid
Second variable spaces 164 of entrance 111 and liquid outlet 153, the volume of the first variable spaces 163 and the second variable spaces 164
It can change with the elastic deformation of elastomeric element 140.Active connection 130 can move between first position and the second position
It is dynamic.In the present embodiment switch block 120 be sheathed on active connection 130 can deformable sleeve, for ease of description, this theory
The next part of bright book with can 120 alternative switch component 120 of deformable sleeve, this can deformable sleeve 120 be sheathed on flexible connection
Part 130.Preferably, can deformable sleeve 120 be made of elastic material, specifically can using silica gel, plastic cement, rubber or other
Common used material, and in an embodiment of the present invention, for the stability and controllability of structure, can deformable sleeve 120 elasticity
Coefficient is greater than the coefficient of elasticity of elastomeric element 140.In other implementations, switch block in addition to can be can deformable sleeve
120, it can also be to open liquid inlet and the closing liquid entrance when extracting feed flow plug in insertion feed flow plug for other
Structure will not enumerate repeat herein.
It is that the infusion connector of the embodiment of the present invention accesses the structure sectional view after feed flow plug referring to Fig. 8, Fig. 8.When access supplies
After liquid plug 210, can deformable sleeve 120 form opening, active connection 130 is in the second position.I.e. feed flow plug 210 pushes
Can deformable sleeve 120, when can deformable sleeve 120 reach predetermined position when deformation occurs and forms opening, active connection at this time
130 dock with access feed flow plug 210, and the volume of the first variable spaces 163 becomes larger, liquid inlet 111 and liquid outlet 153 it
Between form fluid path and liquid and can enter in the first variable spaces 163；Referring to Fig. 5, after taking out feed flow plug 210,
Active connection 130 is moved to first position shown in fig. 5 from the second position under the action of elastomeric element 140, can deformation set
120 sealing liquid entrance 111 of pipe；Wherein, the volume of the first variable spaces 163 changes the residual solution so that in infusion connector 100
Body flows to 153 direction of liquid outlet and forms normal pressure or zero pressure in liquid outlet.Specifically, active connection 130 returns
When to first position, the volume of the first variable spaces 163 becomes smaller, and the volume of the second variable spaces 164 becomes larger, so that solution cavity
Residual liquid in 161 is mobile towards the direction of liquid outlet 153.In the process, when the appearance of 163 reduction of the first variable spaces
When product is greater than the second variable spaces 164 increase volume, extra liquid can then pass through perfusion tube 400 and syringe needle shown in Figure 12
500 enter human body, to form normal pressure at liquid outlet 153.When the volume of 163 reduction of the first variable spaces is equal to second
When variable spaces 164 increase volume, then it will not generate extra liquid and flow to human body, to form zero at liquid outlet 153
Pressure, while there will not be liquid reflux.
Further, referring to Fig. 6-Fig. 8, tip side 110 specifically includes luer threads 112, and liquid inlet 111, one is used for
Accommodate it is deformed can deformable sleeve 120 accommodating cavity 113, further, accommodating cavity 113 is equipped with for can deformable sleeve
120 guide the second guidance cavity 114 to the third place from the 4th position.Further, accommodating cavity 113 further includes one first engagement
Portion 115.
Can deformable sleeve 120 be equipped with a closed top 122 and pipe end 121, top 122 be equipped with a word or cross
Elastic opening 123, the opening may be other shapes.Top 122 is additionally provided with one first guidance cavity 125.In addition, top 122
Also set up a sealing protrusion 127, the sealing protrusion 127 be used for can deformable sleeve 120 be located at the third place when, make top 122
Appearance and liquid inlet 111 inner surface between formed be tightly connected.
Active connection 130 can push elastomeric element 140 that elastically-deformable pedestal 131 and one occurs and be set to including one
Pedestal 131 can be coupled with feed flow plug and form the column tube 132 of fluid path between liquid inlet 111 and liquid outlet 153, i.e.,
Active connection 130 is axial, and there is pipeline liquid can be made to flow to liquid outlet 153 from liquid inlet 111.Wherein, pedestal 131 is gone back
Equipped with aperture 134, which is fluid channel, be may be implemented between the first variable spaces 163 and the second variable spaces 164
Liquid communication, specifically, the quantity of aperture 134 be four, or other quantity.The top of pedestal 131 can form one
One recessed area 135 can be formed at upper concave region 136,131 lower part of pedestal, and aperture 134 is at least partially by upper concave region 136 under
The other part of concave region 135, aperture at this time 134 can pass through the base side wall 137 of pedestal 131.First variable spaces 163 and
Fluid channel between two variable spaces 164 is in addition to that can also be at least one liquid being arranged on elastic wall for aperture 134
Circulation groove, liquid can be flowed between the first variable spaces 163 and the second variable spaces 164 by the liquid bath circulation groove.
Elastomeric element 140 includes elastic inner cavity 141 for that can accommodate active connection 130 and can make elastic inner cavity
The elastic wall 142 of 141 volumes variation.Elastomeric element 140 further includes the support portion 144 for being used to support pedestal 131, with the support portion
144 be boundary, and elastic inner cavity 141 can be divided into the first flexible cavity 1411 and and liquid that can accommodate active connection 120
Second flexible cavity 1412 of 111 mating of outlet, wherein the first flexible cavity 1411 is by the first elastic sidewall 1421 and support portion
144 inner surface defines, and the second flexible cavity 1412 is defined by the inner surface of the second elastic sidewall 1422.Preferably, the first bullet
Property cavity 1411 and the second flexible cavity 1412 are cylindric.Elastomeric element 140 further includes a compression seal pipe 146,1
Two fixed parts 143 and the second engaging portion 148.
Pedestal 150 includes shell 151, third engaging portion 153, liquid outlet 153 and the first fixed part 154.
The assembly method and function of each part of infusion connector 100 are referring to Fig. 6 and Fig. 8.Referring to Figure 12, the Shandong of tip side 110
You can connect screw thread 112 with corresponding cap 300 or corresponding feed flow plug 210.Feed flow plug 210 is accessed in liquid inlet 111.
After being inserted into feed flow plug 210, can deformable sleeve 120 be pushed into accommodating cavity 113, while can deformable sleeve 120 push
Active connection 130, the pedestal 131 of active connection 130 push elastomeric element 140, and the first elastic sidewall 1421, which elongates, to be generated
Elastic deformation, and the volume of the first flexible cavity 1411 becomes larger, since the first variable spaces 163 are mainly by the sky of tip side 110
Between, the first flexible cavity 1411 and active connection 130 define, therefore the volume of the first flexible cavity 1411 becomes larger can make first
The volume of variable spaces 163 increases.At this point, the second elastic sidewall 1422 then receives compression, to make and the second flexible cavity
1412 volume becomes smaller, since the second variable spaces 164 are mainly by the space of liquid outlet 153,1411 and of the second flexible cavity
Active connection 130 defines, therefore the volume of the second flexible cavity 1412 becomes smaller the volume of the second variable spaces 164 can be made to subtract
It is small.
Can deformable sleeve 120 flexible material of elastically deformable can be used be made, when can deformable sleeve 120 be pushed into accommodating
After chamber 113, top 122 receives the thrust of feed flow plug 210 and the elastic force of elastomeric element 140, and this can deformable sleeve 120
The fixation of the side wall of liquid inlet 111 is no longer received when in accommodating cavity 113 and elastic deformation can occur, at this time top 122
Elastic opening 123 equally received the column tube 132 of 140 elastic force of elastomeric element and opened, and the first guidance that top 122 is arranged
125 meeting of chamber is so that column tube 132 is easier to open elastic opening 123.Column tube 132 is inserted into feed flow plug 210, tubing string 132 and confession
The pipeline of liquid plug 210 is connected to.Under the pressure of feed flow plug 210, accommodating storehouse 113 can limit can deformable sleeve 120 to liquid
The rebound of body entrance 111, while elastomeric element 140 is still in elastic deformation state.In addition, can deformable sleeve 120 pipe end
121 bottom is the structure shunk, not influence the circulation of aperture 134.Referring to Figure 10 and Figure 11, Figure 10 is that the present invention is another
The part drawing of the infusion connector of embodiment, Figure 11 be another embodiment of the present invention can deformable sleeve structural schematic diagram, the reality
Apply in example, can deformable sleeve 120 have a baffle 125, the baffle 125 have bigger area can more preferably make active connection
130 131 stress of pedestal, to make elastomeric element 140 with stress more evenly.The baffle is equipped with liquid communication window 126,
Liquid can be made by that can smoothly enter into the first variable spaces 163 after aperture 134.
First joint portion 115 of tip side 110 respectively with the second engaging portion 148 of elastomeric element 140 and pedestal 150
To form the sealing of fixed and liquid, the mode that pressing and/or ultrasonic bonding specifically can be used engages the engagement of third joint portion 152.
First fixed part 143 of elastomeric element 140 is a bayonet lock, and the second fixed part 154 of pedestal 150 is that can block this to open
The card slot of pin or the first fixed part 143 and the second fixed part 154 are the clamping pin structure that can be blocked mutually.In other embodiments
In, different fixed forms, such as welding, stickup etc. can be used between elastomeric element 140 and pedestal 150.
The liquid outlet 153 of pedestal 150 includes an outlet tube 155 for extending to valve chamber 160, the compression of elastomeric element 140
Seal pipe 146, which can be arranged, to be sealed on the outlet tube 155 with forming elastomeric element 140 to the liquid of solution cavity 161, that is, realizes elasticity
Liquid sealing effect between component 140 and liquid outlet 153.The compression seal pipe 146 is preferably one section of bellows, to realize
Sealing effect is not influenced when deformation.
Turning also now to shown in Fig. 9, infusion connector may also include one side bye-pass 170, and the arrival end of collateral branch's pipeline 170 is set
It sets on liquid outlet 153, and the liquid in infusion in collateral branch's pipeline 170 can't enter in solution cavity 161.
Infusion connector 100 realizes the principle that normal pressure is realized at liquid outlet 153 after use are as follows:
After feed flow plug 210 is inserted into, promotion can deformable sleeve 120 enter accommodating cavity 113, can deformable sleeve 120 from third
Position is moved to the 4th position.Can deformable sleeve 120 push pedestal 131 so that pedestal 131 pushes support portion 144 to making bullet
Property wall 142 occur elastic deformation, make solution cavity 163 volume increase and the volume of separate cavities 164 reduce.At this point, first is variable
The volume in space 163 increases, and the volume of the second variable spaces 164 reduces.Simultaneously can deformable sleeve 120 in feed flow plug 210
Deformation occurs in accommodating cavity 113 and is temporarily in the 4th position for pressure, and bullet of the column tube 132 by elastomeric element 140 at this time
Power in deformable sleeve 120 and in feed flow plug 210 from that can dock, and the liquid in feed flow plug 210 can be in liquid inlet 111 at this time
It is flowed between solution cavity 163 between liquid outlet 153, i.e., liquid can enter the second variable spaces by tubing string 132
164, and flow to liquid outlet 153 through the second variable spaces 164 and eventually enter into human body；Meanwhile liquid passes through the aperture of pedestal 131
134 enter in the first variable spaces 163, and are full of the first variable spaces 163.
After feed flow plug 210 is extracted, the pressure for being applied to elastomeric element 140 indirectly disappears, and elastomeric element 140 is returning
The multiple elastic force to original state process keeps the active connection 130 being in contact with it mobile to 111 direction of liquid inlet, active connection
130 pedestal 131 push in its contact can deformable sleeve 120, tubing string 132 also drive can deformable sleeve 120 to liquid inlet
111 directions are mobile, can deformable sleeve 120 enter in liquid inlet 111 under the guidance of the second guidance cavity 114 simultaneously, until arriving
Up to the third place, can deformable sleeve 120 when being moved to 111 direction of liquid inlet, the inner wall of liquid inlet squeezes it
Keep column tube 132 mobile to the direction of liquid outlet 153, first guidance cavity 125 makes column tube after tubing string 132 is retracted into top 122
120 is further mobile to the direction of liquid outlet 153 until the closure of elastic opening 123 forms sealing.It in the process, first can
Emptying 163 volume reduces, and the volume of the second variable spaces 164 increases.Assuming that first when feed flow plug 210 is extracted is variable
The volume of the first variable spaces 163 when the volume in space 163 is inserted into relative to feed flow plug 210 reduces X, and feed flow plug
The appearance of the second variable spaces 163 when the volume of the second variable spaces 164 when 210 extraction is inserted into relative to feed flow plug 210
Product increases Y, then movement of the liquid that volume is X by the aperture 134 of pedestal 131 to realization to 153 direction of liquid outlet.?
During this, when X is greater than Y, i.e. when the volume of 163 reduction of the first variable spaces is greater than the second variable spaces 164 increase volume,
Extra liquid then can enter human body by perfusion tube 400 shown in Figure 12 and syringe needle 500, thus at liquid outlet 153
Form normal pressure.When X is equal to Y, when the volume of 163 reduction of the first variable spaces is equal to the second variable spaces 164 increase volume,
Extra liquid will not then be generated and flow to human body, to form zero pressure at liquid outlet 153, while liquid is there will not be and returning
Stream.
Referring to figure 5-8, figure 5-8 shows a kind of shapes and sizes of the pedestal 131 of active connection 130, practical
The pedestal 131 of active connection 130 can be set in use according to the formation pressure size needed between liquid outlet 153
The fit form of size and shape, pedestal 131 and support portion 144 can influence the deformation form of elastomeric element 140 to influence
The volume variable quantity of first variable spaces 163 and the second variable spaces 164 between different conditions, so as to produce difference
Whole infusion connector, these different infusion connectors pressure size at liquid outlet 153 again after extracting feed flow plug 210
It can according to need setting.
Referring specifically to Figure 13, Figure 13 is the structural schematic diagram of another embodiment of infusion connector provided by the invention, is such as schemed
Shown in 13, the contact area in the first flexible cavity 1411 of the pedestal 131 of active connection 130 is smaller, at this point, when activity connects
When fitting 130 is moved to the second position, pedestal 131 can control the volume increment of the first flexible cavity 1411 in lesser amplitude
It is interior, and the second flexible cavity 1411 then for using column tube 132 for axis axial section as the cavity of polygon, work as active connection
130 when being moved to the second position, and pedestal 131 can control the volume of the second flexible cavity 1411 to be reduced in biggish amplitude, this
The volume that kind structure can make the volume increment of the first variable spaces 163 be equal to the second variable spaces 164 is reduced, and is existed with realizing
Zero pressure is formed at liquid outlet 15.
As shown from the above technical solution, infusion connector provided by the invention passes through active connection for the elasticity of variable volume
Component is divided into the first variable spaces and the second variable spaces, feed flow plug taking-up after, the first variable spaces volume reduce with
Liquid remaining in infusion connector is set to flow to the second variable spaces to form normal pressure or zero pressure at liquid outlet end, just
Pressure and zero pressure depend on the volume variation of the first variable spaces and the second variable spaces.It can be realized more in the prior art
The infusion connector of unidirectional positive pressure, infusion connector structure provided in an embodiment of the present invention is simple, and metal material is not present, need not also adopt
The variation of liquid volume in infusion connector is realized with special gas circuit, while being also easy production and assembly, and can be accurate
The size for controlling normal pressure has higher stability and safety under the premise of realizing accuracy.
Above disclosed is only a preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, therefore equivalent changes made in accordance with the claims of the present invention, are still within the scope of the present invention.
Claims (20)
1. a kind of infusion connector characterized by comprising tip side, pedestal, elastomeric element, active connection and switching group
Part:
The tip side is installed on the pedestal, and the tip side is equipped with liquid inlet；The pedestal and tip side form a valve
Chamber, the pedestal are equipped with liquid outlet；The elastomeric element is set in the valve chamber, and the valve chamber is divided into and can be stored
Liquid and the solution cavity of variable volume and the separate cavities with fluid isolation；The active connection is set in the solution cavity
And it can be moved between first position and the second position；The switch block and the active connection are coupled, for closing or beating
Open the liquid inlet；
After accessing the feed flow plug, the switch block opening opens the liquid inlet, and the active connection moves
It moves to the second position, the volume of the solution cavity increases, while liquid is flowed to from the feed flow plug through the solution cavity
The liquid outlet；After taking out the feed flow plug, the active connection is under the action of the elastomeric element from described
The second position is moved to the first position, and the switch block closes and makes to state liquid inlet closing, the appearance of the solution cavity
Product reduces；Wherein, the volume of the solution cavity changes so that the residual liquid in the infusion connector occurs flowing and described
Liquid outlet forms normal pressure or zero pressure.
2. infusion connector as described in claim 1, which is characterized in that the solution cavity is divided into court by the active connection
The first variable spaces to the liquid inlet and the second variable spaces towards the liquid outlet；When the access feed flow
After plug, switch block opening opens the liquid inlet, and the active connection is in the second position, and described first
Variable spaces volume becomes larger, and liquid is from the feed flow plug into first variable spaces and through the second variable spaces stream
To the liquid outlet；
After taking out the feed flow plug, the active connection is moved under the action of the elastomeric element from the second position
It moves to the first position, the switch block closes the liquid inlet；Wherein, the volume of first variable spaces becomes
Small, the second variable spaces volume becomes larger, and the residual liquid in the solution cavity is according to from the liquid inlet to the liquid
The direction flowing of body outlet, so that the liquid outlet forms normal pressure or zero pressure.
3. infusion connector as claimed in claim 2, which is characterized in that the elastomeric element includes that can accommodate the flexible connection
The elastic inner cavity of part and the elastic wall that the elastic cavity volume can be made to change, the variation of the elasticity cavity volume can make
The variation of the volume of first variable spaces and second variable spaces.
4. infusion connector as described in claim 1, which is characterized in that the active connection can push the elasticity including one
Component occurs elastically-deformable pedestal and one is set to the pedestal and can be coupled with the feed flow plug and enter in the liquid
Mouth and the column tube that fluid path is formed between the liquid outlet.
5. infusion connector as claimed in claim 4, which is characterized in that the elastomeric element further includes being used to support the pedestal
Support portion.
6. infusion connector as claimed in claim 4, which is characterized in that first variable spaces and second variable spaces
Between be equipped at least one circulation passage.
7. infusion connector as claimed in claim 5, which is characterized in that the circulation passage is to be set to the pedestal or setting
In on the elastic wall.
8. infusion connector as described in claim 1, which is characterized in that the liquid outlet includes one extending to the valve chamber
Outlet tube.
9. infusion connector as claimed in claim 4, which is characterized in that the switch block is to be set in the active connection
Can deformable sleeve.
10. infusion connector as claimed in claim 9, which is characterized in that it is described can deformable sleeve be sheathed on the tubing string；When not
When accessing the feed flow plug, it is described can deformable sleeve by the column tube be enclosed in it is described can in deformable sleeve, it is described at this time can
Deformable sleeve is in the third place, and the active connection is in the first position；It is described when accessing the feed flow plug
Column tube can be released in deformable sleeve and be coupled with the feed flow plug from described, it is described at this time can deformable sleeve be in the 4th
It sets, the active connection is in the second position.
11. infusion connector as claimed in claim 10, which is characterized in that it is described can deformable sleeve be equipped with a closed top
And the pipe end for accommodating the column tube and being engaged with the pedestal.
12. infusion connector as claimed in claim 10, which is characterized in that the top is equipped with a word or cross elasticity is opened
Mouthful.
13. infusion connector as claimed in claim 9, which is characterized in that the top is equipped with for guiding the column tube
One guidance cavity.
14. infusion connector as claimed in claim 10, which is characterized in that it is deformed for accommodating that the tip side is equipped with one
It is described can deformable sleeve accommodating cavity；When being inserted into the feed flow plug, the feed flow plug can deformable sleeve push-in by described in
The accommodating cavity, it is described can deformable sleeve be in the 4th position, and it is described can deformable sleeve deformation occurs, the column tube from
Described to release in deformable sleeve and be coupled with the feed flow plug, the active connection is in the second position.
15. infusion connector as claimed in claim 14, which is characterized in that the accommodating cavity be equipped with for will described in can deformation set
Pipe guides the second guidance cavity to the third place from the 4th position.
16. infusion connector as claimed in claim 9, which is characterized in that it is described can deformable sleeve be made of elastic flexible material.
17. infusion connector as described in claim 1, which is characterized in that the inner wall of the pedestal, which is provided with, can fix the bullet
First fixed part of property component.
18. infusion connector as claimed in claim 17, which is characterized in that the elastomeric element is equipped with a fixed part mating
The second fixed part.
19. infusion connector as claimed in claim 4, which is characterized in that the pedestal is fixed on the support portion.
20. such as the described in any item infusion connectors of claim 1-19, which is characterized in that further include at least one side bye-pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811368706.8A CN109432541B (en) | 2018-11-16 | 2018-11-16 | Infusion connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811368706.8A CN109432541B (en) | 2018-11-16 | 2018-11-16 | Infusion connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109432541A true CN109432541A (en) | 2019-03-08 |
| CN109432541B CN109432541B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811368706.8A Active CN109432541B (en) | 2018-11-16 | 2018-11-16 | Infusion connector |
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| Country | Link |
|---|---|
| CN (1) | CN109432541B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109432541B (en) | 2024-04-19 |
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