CN208958964U - Positive pressure needle-free infusion connector - Google Patents

Abstract

The utility model belongs to infusion apparatus field, more particularly to a kind of positive pressure needle-free infusion connector, including joint housing and elastic sealing element, there is medical fluid runner, the gas passage communicated with the outside world in the lower bottom base of joint housing, there is retractable gap at the top of the upper neck of elastic sealing element, its side has wing passage, and the outer diameter of the lower base portion of elastic sealing element is greater than upper neck, and lower end is fixed in joint housing；Setting sealing limited step on upper outer casing inner wall；The side wall runner communicated with the medical fluid runner of lower bottom base is provided on upper shell；It is fixed in upper neck folding body (upper neck and lower base portion inner cavity is completely isolated), there is inner supporting body in lower base portion inner cavity, the height of inner supporting body is less than the cavity heights of lower base portion.The utility model is able to maintain that positive pressure or micro-positive pressure in use, prevents blood backflow；Under inner supporting body effect, lower base portion meeting generation rule deformation to form liquid rule channel, makes in flushing process without dead angle.

Description

Positive pressure needle-free infusion connector

Technical field

The utility model relates to a kind of positive pressure needle-free infusion connectors, belong to infusion apparatus field.

Background technique

Venous transfusion would generally be used in treatment clinical course, currently, because no-needle transfusion connector can be to avoid using syringe needle It punctures repeatedly, therefore has and reduce patient suffering and avoid advantage of the medical staff by needlestick injuries, through being answered extensively During venous transfusion.

But in existing no-needle transfusion connector easily there is gap in the docking location of inner seal liner and shell, therefore sealing performance is deposited It is being short of, will lead to bacterium disinfection and be not thorough；Simultaneously in infusion process, the sealing element inside infusion connector is under squeezing action In irregular deformation, so that (such as Bei Lang, Kang Erfusheng, sky are bright in irregular runner for the infusion channel inside infusion connector The infusion connector of company's production), it will lead to Dead Core Problems when in use, cause washing pipe unclean, not exclusively, residual blood rushes for exhaust It does not wash clean, therefore after blood product transfusion, needs replacing, Reusability can not be carried out.

Utility model content

Technical problem to be solved by the utility model is: overcome deficiency in the prior art, provide in a kind of use process It is able to maintain that positive pressure or micro-positive pressure, prevents in blood backflow and internal fluid passages rule, guarantee flushing process without dead angle Positive pressure needle-free infusion connector.

Positive pressure needle-free infusion connector described in the utility model, including joint housing and elastic sealing element, joint housing by Upper shell and lower bottom base are formed by connecting, and have the medical fluid runner, the gas passage that communicate with the outside world in lower bottom base, elastic sealing element by Elastic material is made and is located in joint housing, and elastic sealing element is hollow cylinder, by upper neck and lower base portion integrally connected It forming, there is openable and closable gap at the top of upper neck, side has wing passage, and the outer diameter of lower base portion is greater than upper neck, under End is fixed in joint housing；The crossover position of neck and lower base portion in correspondence, the setting sealing limiting stand on upper outer casing inner wall Rank；It is located on the inner wall below sealing limited step on upper shell and is provided with the side wall runner communicated with the medical fluid runner of lower bottom base； Folding body is fixed in the lower lumen of upper neck, it is by upper folding body that upper neck and lower base portion inner cavity is completely isolated, under There is inner supporting body, the height of inner supporting body is less than the cavity heights of lower base portion in base portion inner cavity；Under original state, upper neck top The gap in portion is in closed state, and the crossover position of neck and lower base portion pushes against sealing limited step on elastic sealing element；When outer When power acts on elastic sealing element from top, the gap is opened, and elastic sealing element is separated with sealing limited step.

The working principle process of the utility model is as follows:

When clinical transfusion, syringe or other outer circle taper joints are inserted into positive pressure needle-free infusion connector above upper shell. Just start, the upper end position of upper neck moves down in elastic sealing element, under the position-limiting action that body is opened and closed on inside, in the middle part of upper neck Bending occurs outward, at the top of gap open, medical fluid through gap enter upper neck inner cavity, and the wing passage through upper neck into Enter in the cavity between upper neck and upper shell；Later, with the insertion of syringe or other outer circle taper joints, elastic sealing element Lower base portion pushed in the inside support limit effect of inner supporting body and contract regular deformation occurs, compress to a certain extent by interior branch Support body blocks, and the inner cavity dischargeable capacity of lower base portion gradually becomes smaller until constant, makes the medical fluid flow velocity of input keep stablizing, lower base portion Gas in inner cavity is discharged along the gas passage of lower bottom base, at the same time, the crossover position of upper neck and lower base portion gradually with it is close Limited step separation is sealed, medical fluid enters the side wall runner of upper shell simultaneously through the gap between elastic sealing element and sealing limited step Entered in perfusion tube by the medical fluid runner in lower bottom base.

After the completion of infusion, syringe or other outer circle taper joints are separated with infusion connector, at this point, acting on bullet from top Property sealing element external force eliminate, the upper neck of elastic sealing element rises under own resilient effect, resets with base portion at present, under making The inner cavity dischargeable capacity of base portion becomes larger until setting back.During this, positive pressure is remained in infusion connector, so as to Enough prevent blood backflow, it is ensured that the safety used.

Except above-mentioned points, in the utility model elastic sealing element lower base portion inner supporting body inside support limit effect under Implementation rule deformation, it is irregular to solve the problems, such as that traditional elastic sealing element deforms, and form liquid rule channel, flushing process Middle no dead angle, exhaust completely, will not have blood residuals after inputting blood product, same patient can be made repeatedly With.

Preferably, upper neck periphery has bulge loop, and the position of bulge loop is higher than the wing passage of upper neck, and corresponding bulge loop is upper outer Step is set on shell inner wall as sealing locating part.

Preferably, the lower end periphery of lower base portion has circular base in elastic sealing element, and upper shell is under in joint housing The rigging position of pedestal forms the annular groove to match with circular base, and circular base is stuck in annular groove, realizes elasticity Lower base portion lower end and joint housing are fixedly connected in sealing element, while upper shell and lower bottom base has been effectively ensured in joint housing The sealing effect of rigging position.

In the utility model, the wing passage of upper neck side can be designed as normally opened channel, may be designed in retractable Channel.When the wing passage is retractable channel, in the initial state (when i.e. without external force), wing passage is in closed state, When external force acts on upper neck from top, wing passage is opened, and this design is compared with normally opened channel, the screen resilience of upper neck Greatly, it is easier to realize and reset.

Preferably, the lower part of upper folding body has seal receptacle, and the upper surface of seal receptacle is contacted with the inner top of lower base portion, On corresponding contact position, lower base portion is equipped with downwardly projecting lip ring, sealing is realized, thus by upper neck and lower base Portion inner cavity is completely isolated, keeps disinfection more thorough.It is further preferred that lip ring and lower base portion are using integrated molding.? When practical application, the sealing of seal receptacle and lower base in contact face can also be realized using other modes, such as in the upper of seal receptacle Outer bulge loop is designed on surface, and the outer bulge loop of correspondence is set on lower base portion to seal groove, and when assembly makes outer bulge loop be stuck in seal groove just In, it equally can also reach sealing effect, it is finally that upper neck and lower base portion inner cavity is completely isolated.

Preferably, the outer shape of the crossover position of upper neck and lower base portion is taper, the corresponding crossover position, upper shell Sealing limited step chamfering on inner wall makes to realize that face connects between the crossover position of neck and lower base portion and sealing limited step Touching sealing, to enhance sealing effect.

Inner supporting body in the utility model can be fixedly connected with upper folding body, after fixed, inner supporting body and lower bottom base Between have adjustment gap, it is ensured that when external force acts on elastic sealing element from top, inner supporting body is moved down, from inside to elasticity it is close The lower base portion of sealing is supported limit, to reduce the deformation of lower base portion, forms liquid rule channel.Inner supporting body can also be with Lower bottom base is fixedly connected, and make between inner supporting body and the inner top of lower base portion have adjustment gap, when have external force from top make When for elastic sealing element, still the lower base portion to elastic sealing element from inside is supported limit to inner supporting body, reduces lower base The deformation in portion.

Preferably, when eliminating from the external force that top acts on elastic sealing element, the lower base portion inner cavity of elastic sealing element has Effect volume variable quantity is 0-15 μ L, i.e., keeps positive pressure or micro-positive pressure in no-needle transfusion connector, effectively prevent blood backflow.

Preferably, elastic sealing element uses silica gel material.

Possessed beneficial effect is the utility model compared with prior art:

1, the utility model controls the volume of lower base portion inner cavity by the elasticity and inner supporting body of elastic sealing element, defeated During liquid, lower base portion cavity volume gradually becomes smaller until constant, and the medical fluid flow velocity of input is made to keep stablizing, after infusion, Lower base portion cavity volume becomes larger until setting back, and infusion connector is interior to keep positive pressure or micro-positive pressure, to effectively prevent blood Liquid reflux, it is ensured that the safety used；

2, the utility model using folding body control top gap folding, when syringe or other outer circle taper joints are from upper When side's insertion infusion connector, medical fluid first passes through the upper neck inner cavity of elastic sealing element, the wing passage again through upper neck enters elasticity In cavity between sealing element and upper shell, deflection is small and exhaust is complete, solves present in traditional needle-free infusion connector Because medical fluid directly sidled outside elastic component brought by elastic component deflection is big, more than bubble and is not easy the problem of being discharged；

3, under the action of inner supporting body, the lower base portion meeting generation rule deformation of elastic sealing element, to form liquid rule Then channel makes will not there are problems that blood residuals after inputting blood product without dead angle in flushing process, can for same patient Reusability.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of embodiment one in the initial state；

Fig. 2 is structural schematic diagram of the embodiment one under venous transfusion state；

Fig. 3 is the sectional view after Fig. 1 is rotated by 90 °；

Fig. 4 is the structural schematic diagram of elastic sealing element；

Fig. 5 is the structural schematic diagram of lower bottom base in embodiment one；

Fig. 6 is the sectional view after Fig. 5 is rotated by 90 °；

Fig. 7 is the structural schematic diagram of embodiment two in the initial state；

Fig. 8 is the structural schematic diagram of lower bottom base in embodiment two.

In figure: 1, lower bottom base；2, medical fluid runner；3, circular base；4, side wall runner；5, inner supporting body；6, lower base portion；7, Crossover position；8, upper folding body；9, upper neck；10, upper shell；11, gap；12, wing passage；13, fixing assembling platform；14, ring Shape sealing element；15, seal receptacle；16, outer circle taper joint；17, bulge loop；18, gas passage.

Specific embodiment

The embodiments of the present invention are described further with reference to the accompanying drawing:

Embodiment one:

As shown in figs. 1 to 6, positive pressure needle-free infusion connector described in the present embodiment includes joint housing and elastic sealing element, is connect Casing is formed by connecting by upper shell 10 and lower bottom base 1, has medical fluid runner 2, the gas passage communicated with the outside world in lower bottom base 1 18, elastic sealing element is made of elastic material and is located in joint housing, and elastic sealing element is hollow cylinder made of silica gel material Body is formed by upper neck 9 and lower 6 integrally connected of base portion, has openable and closable gap 11 at the top of upper neck 9, side has The outer diameter of wing passage 12, lower base portion 6 is greater than upper neck 9, and lower end is fixed in joint housing；Neck 9 and lower base portion 6 in correspondence Crossover position 7, on upper 10 inner wall of shell setting sealing limited step (under original state, on elastic sealing element neck 9 under The crossover position 7 of base portion 6 pushes against the sealing limited step, when external force acts on elastic sealing element from top, elastic sealing element Gradually separated with sealing limited step, wing passage 12 of the medical fluid through upper neck 9, upper shell 10 side wall runner 4 and pass through bottom Medical fluid runner 2 in seat 1 enters in perfusion tube)；It is located on the inner wall below sealing limited step on upper shell 10 and is provided with under The side wall runner 4 that the medical fluid runner 2 of pedestal 1 communicates；It is fixed with folding body 8 in the lower lumen of upper neck 9, passes through upper folding Body 8 is completely isolated by upper neck 9 and lower 6 inner cavity of base portion, and in the present embodiment, fixing assembling platform is arranged on the inner wall of upper neck 9 13, and fixture block or snap ring is arranged in corresponding fixing assembling platform 13 on upper 8 outer wall of folding body, is realized and is opened and closed by snap fit Body 8 is fixedly connected with upper neck 9；There is inner supporting body 5, the height of inner supporting body 5 is less than lower base portion 6 in lower 6 inner cavity of base portion Cavity heights；Under original state, the gap 11 at upper 9 top of neck is in closed state, when external force acts on elasticity from top When sealing element, the gap 11 is opened.

In the present embodiment:

Upper 9 periphery of neck has bulge loop 17, and the position of bulge loop 17 is higher than the wing passage 12 of upper neck 9, and corresponding bulge loop 17 exists Step is set on upper 10 inner wall of shell as sealing locating part.

The wing passage 12 of upper 9 side of neck is retractable channel (may be designed in normally opened channel), in this way, in initial shape Under state (when i.e. without external force), wing passage 12 is in closed state, when external force acts on upper neck 9 from top, wing passage 12 open, and compared with normally opened channel, the screen resilience of upper neck 9 is big for this design, it is easier to realize and reset, sealing effect is also opposite Preferably.

The outer shape of upper neck 9 and the crossover position 7 of lower base portion 6 is taper, the corresponding crossover position 7, upper shell 10 Sealing limited step chamfering on inner wall makes to realize between the crossover position 7 of neck 9 and lower base portion 6 and sealing limited step Face contact sealing, to enhance sealing effect.

The lower part of upper folding body 8 has seal receptacle 15, and the upper surface of seal receptacle 15 is contacted with the inner top of lower base portion 6, On corresponding contact position, lower base portion 6 is equipped with downwardly projecting lip ring 14, realizes sealing, thus by upper neck 9 with Lower 6 inner cavity of base portion is completely isolated, keeps disinfection more thorough, in the present embodiment, lip ring 14 and lower base portion 6 using one at Type.

The seal receptacle 15 of inner supporting body 5 in the present embodiment and upper folding body 8 using be integrally formed (i.e. inner supporting body 5 with Upper folding body 8 is fixedly connected), there is adjustment gap, it is ensured that external force is made from top after fixed, between inner supporting body 5 and lower bottom base 1 When for elastic sealing element, inner supporting body 5 is moved down, and from inside, the lower base portion 6 to elastic sealing element is supported limit, to reduce The deformation of lower base portion 6 forms liquid rule channel.

The lower end periphery of lower base portion 6 has circular base 3, upper shell 10 and lower bottom base in joint housing in elastic sealing element 1 rigging position forms the annular groove to match with circular base 3, and circular base 3 is stuck in annular groove, realizes that elasticity is close Lower 6 lower end of base portion and joint housing are fixedly connected in sealing, while upper shell 10 and bottom has been effectively ensured in joint housing The sealing effect of 1 rigging position of seat.

When the external force for acting on elastic sealing element from top is eliminated, the dischargeable capacity of 6 inner cavity of lower base portion of elastic sealing element Variable quantity is 0-15 μ L, i.e., keeps positive pressure or micro-positive pressure in no-needle transfusion connector, effectively prevent blood backflow.

The working principle process of the present embodiment is as follows:

When clinical transfusion, syringe or other outer circle taper joints 16 are inserted into positive pressure needle-free infusion above upper shell 10 and connect Head.Just starting, the upper end position of upper neck 9 moves down in elastic sealing element, under the position-limiting action that body 8 is opened and closed on inside, upper neck Bending occurs outward for the middle part of portion 9, at the top of gap 11 open, medical fluid enters upper 9 inner cavity of neck through gap 11, and through upper neck The wing passage 12 in portion 9 enters in the cavity between upper neck 9 and upper shell 10；Later, with syringe or other outer circle tapered joints First 16 insertion, the lower base portion 6 of elastic sealing element pushes to contract in the inside support limit effect of inner supporting body 5 occurs regular change Shape, the gas in lower 6 inner cavity of base portion are discharged along the gas passage 18 of lower bottom base 1, and the inner cavity dischargeable capacity of lower base portion 6 gradually becomes smaller Until constant, the medical fluid flow velocity of input is made to keep stablizing, at the same time, the crossover position 7 of upper neck 9 and lower base portion 6 gradually with Limited step separation is sealed, medical fluid enters the side wall of upper shell 10 through the gap 11 between elastic sealing element and sealing limited step Runner 4 is simultaneously entered in perfusion tube by the medical fluid runner 2 in lower bottom base 1.

After the completion of infusion, syringe or other outer circle taper joints 16 are separated with positive pressure needle-free infusion connector, at this point, from upper The external force that side acts on elastic sealing element is eliminated, and the upper neck 9 of elastic sealing element rises under own resilient effect, with base at present Portion 6 resets, and becomes larger the inner cavity dischargeable capacity of lower base portion 6 until setting back.During this, protected always in infusion connector Positive pressure is held, so as to prevent blood backflow, it is ensured that the safety used.

Except above-mentioned points, in the present embodiment elastic sealing element lower base portion 6 inner supporting body 5 inside support limit effect under Implementation rule deformation, it is irregular to solve the problems, such as that traditional elastic sealing element deforms, and form liquid rule channel, flushing process Middle no dead angle, exhaust completely, will not have blood residuals after inputting blood product, same patient can be made repeatedly With.

Embodiment two:

As shown in Fig. 7~8, the structure of positive pressure needle-free infusion connector described in the present embodiment is basically the same as the first embodiment, no It is that inner supporting body 5 is (using integrated molding both in the present embodiment) being fixed on lower bottom base 1, inner supporting body 5 with place There is adjustment gap, when there is external force to act on elastic sealing element from top, inner supporting body 5 between the inner top of lower base portion 6 Still from inside, the lower base portion 6 to elastic sealing element is supported limit, reduces the deformation of lower base portion 6.

The working principle process of this positive pressure needle-free infusion connector described in embodiment two is the same as example 1.

Claims (10)

1. a kind of positive pressure needle-free infusion connector, including joint housing and elastic sealing element, joint housing by upper shell (10) and under Pedestal (1) is formed by connecting, and has medical fluid runner (2), the gas passage (18) communicated with the outside world, elastic packing in lower bottom base (1) Part is made of elastic material and is located in joint housing, it is characterised in that: elastic sealing element is hollow cylinder, by upper neck (9) it is formed with lower base portion (6) integrally connected, there are openable and closable gap (11) at the top of upper neck (9), side has wing passage (12), the outer diameter of lower base portion (6) is greater than upper neck (9), and lower end is fixed in joint housing；Neck (9) and lower base in correspondence The crossover position (7) in portion (6), the setting sealing limited step on upper shell (10) inner wall；It is located at sealing limit on upper shell (10) The side wall runner (4) communicated with the medical fluid runner (2) of lower bottom base (1) is provided on inner wall below the step of position；Under upper neck (9) Folding body (8) is fixed in portion inner cavity, it is by upper folding body (8) that upper neck (9) and lower base portion (6) inner cavity is completely isolated, There are inner supporting body (5) in lower base portion (6) inner cavity, the height of inner supporting body (5) is less than the cavity heights of lower base portion (6)；

Under original state, the gap (11) at the top of upper neck (9) is in closed state, and the upper neck (9) of elastic sealing element is under The crossover position (7) of base portion (6) pushes against sealing limited step；

When external force acts on elastic sealing element from top, the gap (11) is opened, elastic sealing element and sealing limited step Separation.

2. positive pressure needle-free infusion connector according to claim 1, it is characterised in that: upper neck (9) periphery has bulge loop (17), the position of bulge loop (17) is higher than the wing passage (12) of upper neck (9), and corresponding bulge loop (17) are set on upper shell (10) inner wall Step is set as sealing locating part.

3. positive pressure needle-free infusion connector according to claim 1, it is characterised in that: in elastic sealing element lower base portion (6) Lower end periphery has circular base (3), and the rigging position of upper shell (10) and lower bottom base (1) is formed and annular base in joint housing The annular groove that seat (3) matches, circular base (3) are stuck in annular groove, realize lower base portion (6) lower end in elastic sealing element With being fixedly connected for joint housing.

4. positive pressure needle-free infusion connector according to claim 1, it is characterised in that: the wing passage of upper neck (9) side It (12) is normally opened channel.

5. positive pressure needle-free infusion connector according to claim 1, it is characterised in that: the wing passage of upper neck (9) side It (12) is retractable channel；Under original state, wing passage (12) is in closed state；When external force acts on upper neck from top (9) when, wing passage (12) is opened.

6. positive pressure needle-free infusion connector according to claim 1, it is characterised in that: above open and close the lower part of body (8) with close It seals seat (15), the upper surface of seal receptacle (15) is contacted with the inner top of lower base portion (6), on corresponding contact position, lower base portion (6) it is equipped with downwardly projecting lip ring (14).

7. positive pressure needle-free infusion connector according to claim 1, it is characterised in that: the mistake of upper neck (9) and lower base portion (6) The outer shape for crossing position (7) is taper, the corresponding crossover position (7), and the sealing limited step on upper shell (10) inner wall falls Angle.

8. any positive pressure needle-free infusion connector according to claim 1~7, it is characterised in that: inner supporting body (5) with it is upper Folding body (8) is fixedly connected, and has adjustment gap between inner supporting body (5) and lower bottom base (1).

9. any positive pressure needle-free infusion connector according to claim 1~7, it is characterised in that: inner supporting body (5) is under Pedestal (1) is fixedly connected, and has adjustment gap between inner supporting body (5) and the inner top of lower base portion (6).

10. any positive pressure needle-free infusion connector according to claim 1~7, it is characterised in that: act on bullet from top Property sealing element external force when eliminating, the dischargeable capacity variable quantity of lower base portion (6) inner cavity of elastic sealing element is 0-15 μ L.