CN205163788U - Positive -pressure needle -free connecting piece - Google Patents
Positive -pressure needle -free connecting piece Download PDFInfo
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- CN205163788U CN205163788U CN201520848188.5U CN201520848188U CN205163788U CN 205163788 U CN205163788 U CN 205163788U CN 201520848188 U CN201520848188 U CN 201520848188U CN 205163788 U CN205163788 U CN 205163788U
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- inner core
- pressure needle
- positive pressure
- wall
- circular arc
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Abstract
The utility model discloses a positive -pressure needle -free connecting piece, including a shell that has the cavity inner chamber, the holding has one to have solid upper end and the hollow inner core of tip down in the cavity inner chamber, the top surface of upper end with the upper end degree of lip -rounding of shell becomes seal structure, be formed with an at least recess on the outer wall of lower tip, the tip has the inner chamber down, the tip is connected with a joint sealing down, be provided with the intercommunication on the joint inner chamber and external exhaust hole, the lower extreme that connects is equipped with the liquid outlet, works as when positive -pressure needle -free connecting piece is in the open mode, the inner core downstream, the inner wall of shell with water conservancy diversion passageway between the outer wall of inner core is opened, the liquid medicine by the water conservancy diversion passageway flows extremely liquid outlet and realize the infusion process. The utility model discloses a be formed with a recess on the tip outer wall under the inner core for water conservancy diversion passageway space grow between shell inner wall and the inner core outer wall, thus the velocity of flow of liquid medicine improved.
Description
Technical field
This utility model infusion apparatus field, particularly relates to a kind of positive pressure needle-free connector.
Background technology
Positive pressure needle-free connector is the infusion connector of a kind of needleless sealing, because it is extracting injection or tube for transfusion produces malleation instantaneously, 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.
Existing positive pressure needle-free connector is after transfusion terminates, and need complicated operation technique could produce the effect of positive pressure tube sealing, maneuver is complicated, tube sealing effect is undesirable, increases clinical workload, in addition, the medicinal liquid flow velocity of existing positive pressure needle-free connector is excessively slow, and medicinal liquid flow does not reach clinical requirement.
Utility model content
The purpose of this utility model is to provide a kind of positive pressure needle-free connector.
For realizing one of above-mentioned utility model object, this utility model one embodiment provides a kind of positive pressure needle-free connector, comprise the shell that has hollow cavity, the inner core that one has solid upper end and hollow bottom is equipped with in described hollow cavity, the end face of described upper end and the upper port of described shell form hermetically-sealed construction, the outer wall of described bottom is formed with at least one groove, described bottom has inner chamber, described bottom is connected with a joint sealing, described joint is provided with the steam vent being communicated with described inner chamber and the external world, the lower end of described joint is provided with liquid outlet, when described positive pressure needle-free connector is in open mode, described inner core moves downward, flow-guiding channel between the inwall of described shell and the outer wall of described inner core is opened, medicinal liquid flow to described liquid outlet by described flow-guiding channel and realizes infusion process.
As the further improvement of this utility model one embodiment, described groove comprise translot, vertical slot, S type groove, skewed slot at least one of them.
As the further improvement of this utility model one embodiment, described groove is translot, and described translot extends along the circumferencial direction of the described bottom of described inner core.
As the further improvement of this utility model one embodiment, described translot runs through the outer wall of described bottom along the circumferencial direction of described bottom.
As the further improvement of this utility model one embodiment, plane through the central shaft of described bottom first circular arc and second circular arc that form indent crossing with described translot, described first circular arc is positioned on the outer wall of described bottom, and described second circular arc is positioned on the inwall of described bottom.
As the further improvement of this utility model one embodiment, the radius of described first circular arc is different from the radius of described second circular arc.
As the further improvement of this utility model one embodiment, the maximum hollow depth of described first circular arc is different from the maximum hollow depth of described second circular arc.
As the further improvement of this utility model one embodiment, crossing formation first point of contact, other regions of described first circular arc and described outer wall and the second point of contact, first tangent line at described first point of contact place is mutually vertical with second tangent line at described second point of contact place.
As the further improvement of this utility model one embodiment, described groove is vertical slot, and described vertical slot extends along the axis direction of the described bottom of described inner core.
As the further improvement of this utility model one embodiment, the bottom surface of described bottom is run through in one end of described vertical slot.
Compared with prior art, the beneficial effects of the utility model are: inner core bottom of the present utility model outer wall is formed with groove, and the flow-guiding channel space between outer casing inner wall and interior outer core is become greatly, thus improve the flow velocity of medicinal liquid.
Accompanying drawing explanation
Fig. 1 is the positive pressure needle-free connector axonometric chart of this utility model one embodiment;
Fig. 2 is the positive pressure needle-free connector closed condition profile of this utility model one embodiment;
Fig. 3 is the positive pressure needle-free connector open mode profile of this utility model one embodiment;
Fig. 4 is the inner core axonometric chart of this utility model one embodiment;
Fig. 5 is the inner core profile of this utility model one embodiment;
Fig. 6 is a-quadrant enlarged drawing in Fig. 5;
Fig. 7 is the inner core axonometric chart of another embodiment of this utility model;
Fig. 8 is the inner core profile of another embodiment of this utility model;
Fig. 9 is B-B profile in Fig. 8.
Detailed description of the invention
Below with reference to detailed description of the invention shown in the drawings, this utility model is described in detail.But these embodiments do not limit this utility model, the structure that those of ordinary skill in the art makes according to these embodiments, method or conversion functionally are all included in protection domain of the present utility model.
As Figure 1-Figure 4, be the positive pressure needle-free connecting-piece structure schematic diagram of this utility model one embodiment, described malleation connector 100 comprises the shell 10 with hollow cavity, and the upper port 11 of shell 10 has external screw thread.Be equipped with in the hollow cavity of shell 10 and have solid upper end 21 and hollow bottom 22 inner core 20, the upper end 21 of inner core 20 and bottom 22 are formed in one.The end face of the upper end 21 of inner core 20 and the upper port 11 of shell 10 form hermetically-sealed construction, and the side of the upper end 21 of inner core 20 is provided with at least one breach 211, and this breach 211 makes inner core 20 have good stability when pressurized is opened.
Described inner core 20 upper end 21 external diameter is less than bottom 22 external diameter, and the shoulder 23 of the inner core 20 that changes to bottom 22 of upper end 21 and housing 10 inner seal.Bottom 22 and the joint 30 of described inner core 20 are tightly connected, concrete, the bottom 22 of described inner core 20 offers cannelure 24 around its inner chamber 221, the upper end of described joint 30 is formed with boss 31, when described inner core 20 is arranged on described joint 30, described cannelure 24 is set on described boss 31, forms double-layer seal by the elasticity of cannelure 24 self and boss 31, eliminate the use of binding agent, also can make inner core 20 better and joint 30 be fixed.Joint 30 can adopt general expression or female Luer.Described joint 30 is symmetrically arranged with and is communicated with the inner chamber 221 of inner core 20 and two steam vents 32 in the external world, the lower end of described joint 30 offers liquid outlet 33, and described steam vent 32 is arranged on the both sides of liquid outlet 33.When described positive pressure needle-free connector 100 is in open mode, described inner core 20 moves downward, flow-guiding channel 12 between the inwall of described shell 10 and the outer wall of described inner core 20 is opened, medicinal liquid flow to described liquid outlet 33 by described flow-guiding channel 12 and realizes infusion process, here, described joint 30 also can be provided with pod apertures (sign), and described pod apertures is in order to be communicated with described flow-guiding channel 12 and described liquid outlet 33.
The sidewall of shell 10 is provided with at least one arm 40 be communicated with the hollow cavity of shell 10, and described arm 40 can be used for carrying other medicinal liquids in the hollow cavity of housing 10.
In the present embodiment, as shown in Figure 2 to 3, the upper end 21 of inner core 20 is descended to seal up the upper port 11 of shell 10 in off position, when using with the syringe of straight mouth or screw socket or other apparatus, the upper end 21 of inner core 20 is compressed by its joint 50, when pressure transmits toward bottom 22, the air pressure of the inner chamber 221 of inner core 20 is contractd inwardly be out of shape, the side of inner core 20 upper end 21 adopts breach 221 to design, when pressurized, make its side all the time along the downward translation of shell 10 inwall, the upper surface 21 of inner core 20 remains close contact with the end face of external connector 50, when arriving the hollow cavity in the middle part of shell 10, there is the position of rocking in hollow cavity the upper end 21 of inner core 20, namely the upper port 11 along shell 10 is defined, the inwall of shell 10 is to a flow-guiding channel 12 of the liquid outlet 33 of joint 30.
Meanwhile, the air in bottom 22 inner chamber 221 of inner core 20 is in communication with the outside aerofluxus by steam vent 32.Because inner core 20 has elasticity, after having injected, inner core 20 expands and resilience makes the upper port 11 of the shell 10 of present embodiment reseal, simultaneously due to after sealing, the inner core 20 of resilience compresses the air in above-mentioned flow-guiding channel 12, produces malleation, and medicinal liquid residual in flow-guiding channel 12 is pushed ahead, prevent blood backflow, avoid the formation of thrombosis.
Described inner core 20 adopts medical grade to remember resilient material and makes, such as, can use the materials such as silica gel, polyurethane, isoprene, thermoplastic elastomer (TPE).
In the present embodiment, the outer wall 223 of the described bottom 22 of described chip 20 is formed with at least one groove 222, and described groove 222 is positioned at described flow-guiding channel 12, compared to the embodiment not comprising described groove 222, groove 222 design of present embodiment can increase the space of flow-guiding channel 12, and then improve the flow velocity of flow-guiding channel 12 inner liquid medicine, increase the flow of medicinal liquid.
Described groove 222 comprise translot, vertical slot, S type groove, skewed slot at least one of them, but not as limit, groove 222 also can be other shapes, and such as, groove 222 is in the shape of a spiral around being arranged on the outer wall 223 of described inner core 20 bottom 22.It should be noted that, groove 222 can't extend in the inner chamber 221 of bottom 22, otherwise the medicinal liquid in flow-guiding channel 12 just can flow out positive pressure needle-free connector 100 via groove 222, inner chamber 221, steam vent 32.
As Figure 4-Figure 6, the described groove 222 of the inner core 20 of this utility model one embodiment is translot 222, described translot 222 extends along the circumferencial direction of the bottom 22 of described inner core 20, and described translot 222 runs through the outer wall 223 of described bottom 22 along described circumferencial direction, namely now translot 222 extends to form circulus, certainly, in other embodiments, described translot 222 can not form circulus, and namely now translot 222 is discontinuous through translot 222.Here, because the circumferencial direction of translot 222 along bottom 22 extends, when inner core 20, under positive pressure needle-free connector 100 open mode, deformation occurs, translot 222 can assist bottom 22 flexural deformation, thus be convenient to external connector 50 press down process.
As shown in Figures 5 and 6, for the profile of described inner core 20, described profile is the profile of the central shaft X through described bottom 22, plane through the central shaft X of described bottom 22 first circular arc 2221 and second circular arc 2222 that form indent crossing with described translot 222, described first circular arc 2221 is positioned on the outer wall 223 of described bottom 22, and described second circular arc 2222 is positioned on the inwall 224 of described bottom 22.Here, the first circular arc 2221 and the second circular arc 2222 are concave inward structure, make the design of translot 222 can't have influence on thickness between the inwall 224 of bottom 22 and outer wall 223, ensure the stability of whole inner core 20.
The radius R 1 of described first circular arc 2221 is different from the radius R 2 of described second circular arc 2222, and the maximum hollow depth D1 of described first circular arc 2221 is different from the maximum hollow depth D2 of described second circular arc 2222.Concrete, the radius R 1=0.35mm of described first circular arc 2221, the radius R 2=0.25mm of described second circular arc 2222, the maximum hollow depth D1=0.2mm of described first circular arc 2221, the maximum hollow depth D2=0.24mm of described second circular arc 2222.
Described first circular arc 2221 formation first point of contact a1 crossing with other regions of described outer wall 223 and the second point of contact a2, the first tangent line l1 at described first a1 place, point of contact is mutually vertical with the second tangent line l2 at described second a2 place, point of contact, namely as shown in Figure 6, the angle α between described first tangent line l1 and the second tangent line l2 is 90 °.
In the present embodiment, the outer wall 223 of described bottom 22 is formed with twice translot 222, and the distance D3=2.8mm between twice translot 222.In addition, overall height H=the 20.75mm of inner core 20, the overall height H 1=12.8mm of bottom 22, the height H 2=7.2mm of translot 222 center to inner core 20 on the lower, the maximum outside diameter d1=6.8mm of inner core 20 bottom 22, the maximum inner diameter d2=6.0mm of inner core 20 bottom 22.Here the numerical value of parameters is only the concrete value of a preferred embodiment, and the specific design parameter of this utility model inner core 20 is not as limit.
As shown in figs. 7 to 9, the described groove 222 of the inner core 20 of another embodiment of this utility model is vertical slot 222a, described vertical slot 222a extends along the axis direction of the described bottom 22 of described inner core 20, and the bottom surface of described bottom 22 is run through in one end of described vertical slot 222a, certainly, in other embodiments, vertical slot 222a can not run through the bottom surface of described bottom 22.Here, because vertical slot 222a extends along axis direction, when medicinal liquid flows in flow-guiding channel 12, vertical slot 222a can accelerate the flow velocity of medicinal liquid further as guiding gutter.
In the present embodiment, in order to increase the design of vertical slot 222a, the maximum inner diameter d2 ' of inner core 20 bottom 22 is reduced, d2 '=5.7mm, so, the thickness between the inwall 224 of bottom 22 and outer wall 223 can be increased, avoid the stability affecting whole inner core 20 because of the design of vertical slot 222a.Vertical slot 222a is to the height H 3=9.9mm of bottom surface, bottom 22, and other parameters of present embodiment inner core 20 can with reference to aforementioned embodiments.In addition, vertical slot 222a can be the arc surface structure of indent, and as shown in Figure 9, be the profile of B-B in Fig. 8, vertical slot 222a forms a circular arc 2221a on this section, the maximum hollow depth D4=0.15mm of the radius R 3=0.5mm of described circular arc 2221a, circular arc 2221a.Here the numerical value of parameters is only the concrete value of a preferred embodiment, and the specific design parameter of this utility model inner core 20 is not as limit.
Inner core bottom of the present utility model outer wall is formed with groove structure, the flow-guiding channel space between outer casing inner wall and interior outer core is increased, thus improve medicinal liquid flow velocity, increase medicinal liquid flow; When positive pressure needle-free connector pressurized, the inner chamber place of inner core first produces distortion, inner core upper end remains original state and moves down along outer casing inner wall, when the upper end of inner core does not also depart from described shell upper port, the upper port of inner core and shell keeps sealing, avoid and bring antibacterial or dust into from the external world, make the time of formation flow-guiding channel or length have controllability, hygiene and health more; By the elastic force of inner core and the change in flow-guiding channel space, produce malleation, avoid backflow of blood and form thrombosis.
Be to be understood that, although this description is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should by description integrally, technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
A series of detailed description listed is above only illustrating for feasibility embodiment of the present utility model; they are also not used to limit protection domain of the present utility model, all do not depart from this utility model skill equivalent implementations of doing of spirit or change all should be included within protection domain of the present utility model.
Claims (10)
1. a positive pressure needle-free connector, comprise the shell that has hollow cavity, the inner core that one has solid upper end and hollow bottom is equipped with in described hollow cavity, the end face of described upper end and the upper port of described shell form hermetically-sealed construction, it is characterized in that: the outer wall of described bottom is formed with at least one groove, described bottom has inner chamber, described bottom is connected with a joint sealing, described joint is provided with the steam vent being communicated with described inner chamber and the external world, the lower end of described joint is provided with liquid outlet, when described positive pressure needle-free connector is in open mode, described inner core moves downward, flow-guiding channel between the inwall of described shell and the outer wall of described inner core is opened, medicinal liquid flow to described liquid outlet by described flow-guiding channel and realizes infusion process.
2. positive pressure needle-free connector according to claim 1, is characterized in that, described groove comprise translot, vertical slot, S type groove, skewed slot at least one of them.
3. positive pressure needle-free connector according to claim 1, is characterized in that, described groove is translot, and described translot extends along the circumferencial direction of the described bottom of described inner core.
4. positive pressure needle-free connector according to claim 3, is characterized in that, described translot runs through the outer wall of described bottom along the circumferencial direction of described bottom.
5. positive pressure needle-free connector according to claim 3, it is characterized in that, plane through the central shaft of described bottom first circular arc and second circular arc that form indent crossing with described translot, described first circular arc is positioned on the outer wall of described bottom, and described second circular arc is positioned on the inwall of described bottom.
6. positive pressure needle-free connector according to claim 5, is characterized in that, the radius of described first circular arc is different from the radius of described second circular arc.
7. positive pressure needle-free connector according to claim 5, is characterized in that, the maximum hollow depth of described first circular arc is different from the maximum hollow depth of described second circular arc.
8. positive pressure needle-free connector according to claim 5, it is characterized in that, crossing formation first point of contact, other regions of described first circular arc and described outer wall and the second point of contact, first tangent line at described first point of contact place is mutually vertical with second tangent line at described second point of contact place.
9. positive pressure needle-free connector according to claim 1, is characterized in that, described groove is vertical slot, and described vertical slot extends along the axis direction of the described bottom of described inner core.
10. positive pressure needle-free connector according to claim 9, is characterized in that, the bottom surface of described bottom is run through in one end of described vertical slot.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520848188.5U CN205163788U (en) | 2015-10-28 | 2015-10-28 | Positive -pressure needle -free connecting piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520848188.5U CN205163788U (en) | 2015-10-28 | 2015-10-28 | Positive -pressure needle -free connecting piece |
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| CN205163788U true CN205163788U (en) | 2016-04-20 |
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| CN201520848188.5U Active CN205163788U (en) | 2015-10-28 | 2015-10-28 | Positive -pressure needle -free connecting piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105169519A (en) * | 2015-10-28 | 2015-12-23 | 苏州鱼跃医疗科技有限公司 | Positive-pressure needle-free connecting piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105169519A (en) * | 2015-10-28 | 2015-12-23 | 苏州鱼跃医疗科技有限公司 | Positive-pressure needle-free connecting piece |
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