CN104815365A - Medical needleless positive pressure joint - Google Patents

Medical needleless positive pressure joint Download PDF

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Publication number
CN104815365A
CN104815365A CN201510260603.XA CN201510260603A CN104815365A CN 104815365 A CN104815365 A CN 104815365A CN 201510260603 A CN201510260603 A CN 201510260603A CN 104815365 A CN104815365 A CN 104815365A
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China
Prior art keywords
shell
plug
elastic plug
female luer
glue shell
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CN201510260603.XA
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Chinese (zh)
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宁湘龙
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宁湘龙
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Priority to CN201510260603.XA priority Critical patent/CN104815365A/en
Publication of CN104815365A publication Critical patent/CN104815365A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a medical tool, and in particular relates to needleless positive pressure joint for transfusion. The needleless positive pressure joint comprises an upper rubber shell, a lower rubber shell and an elastic rubber plug, wherein the upper and lower rubber shells encircle a main cavity, and the lower rubber shell is provided with an air hole communicating the main cavity and the external portion; the elastic rubber plug comprises an upper portion, a step portion and a lower portion sequentially and fixedly connected, the outer wall of the upper portion of the elastic rubber plug is fit with the inner wall of the inner cavity of the female Ruhr joint of the upper rubber shell, the internal portions of the step portion and the lower portion are hollow structure communicating with each other, the step portion is fit with the inner diameter of the hollow cavity encircled by the upper and lower rubber shells, the lower portion of the elastic rubber plug is corrugated in shape, a transverse hole is formed in the connected part of the upper portion and the step portion, the transverse hole communicates with the hollow structures of the step portion and the lower portion, and the lower portion of the elastic rubber plug is connected with the male Ruhr joint of the lower rubber shell. The needleless positive pressure joint adopts the straight-through type structure, so that liquid flows more smoothly. The rubber plug is fit with the surface of the cavity of the rubber shell, and medicine liquid residual quantity is reduced. The needleless positive pressure joint is simple in structure and convenient to produce.

Description

A kind of medical Needleless barotropic joint
Technical field
The present invention relates to a kind of medical appliance, particularly relate to a kind of Needleless barotropic joint of infusing.
Background technology
Remaining needle has been widely used in needing in hospital repeatedly for patient carries out the occasion of transfusion.Along with the development of technology, needleless joint is generally used now to connect remaining needle and extrusion infusing pipeline.Particularly the use of positive pressure needle-free joint becomes advantageous, positive pressure needle-free joint is a kind of when pulling up infusion joint, automatically automatically can form the pressure of a forward at pipeline, automatically push liquid to human body by pipeline, thus avoid the plugging phenomenon that blood causes to the backflow of needle tubing.
Chinese patent CN10879339B just discloses a kind of Needleless dosing positive pressure connector, it starts the unlatching of plug by female Luer, thus realize the liquid flow in single direction, to avoid puncturing the microgranule that may bring due to syringe needle, the pollution of micro-bits, when syringe is pulled up, this positive pressure connector produces a malleation, automatically make the liquid driven forward in positive pressure connector, get back in remaining needle to avoid blood and form thrombosis thus the blocking preventing remaining needle.But above-mentioned patent, due to complex structure, the flow resistance of liquid is large, and there is larger dead space, causes more drug residue.Another Chinese patent CN103071200A has carried out some for these defects to be improved, and cancels the guiding gutter on inwall, simpler in structure, and it makes upper cover circular cross-section into ellipse, makes the residual of medicinal liquid also have certain decline.But it makes fluid path into Y shape, turn increase the structure of liquid flow group power and Y shape, convenient not as straight-through shape in insertion pipe operation, cause the use inconvenience in some occasion.Simultaneously the plug of circular cross-section coordinates with the glue shell of elliptic cross-section and also has certain liquor residue amount.And in the side of plug upper end, at least establish to a breach.And in actual implementation process, words as less in this notch size, plug bending effect is bad, the flow velocity of liquid can be affected, even plug end face withstands joint and cannot open fluid path. and after ensureing plug pressurized, have suitable bending effect, during actual enforcement, this notch size preferably meets or exceeds plug section radius.Such breach can cause plug no matter in die sinking or produce time all very difficult from mould.In fact excessive breach also can add the residual quantity of medicinal liquid.
Summary of the invention
In order to overcome above-mentioned defect, the medical Needleless barotropic joint that the invention provides a kind of through type, structure is simple, liquid flow is more unobstructed, liquor residue amount can be reduced.
Described gluing shell and lower glue shell are all hollow structure, gluing shell bottom is connected with lower glue shell top photocuring, upper and lower glue shell surrounds main cavity, the top of described gluing shell is provided with female female Luer, described female female Luer and main cavity connects, described lower glue shell bottom is provided with the public female Luer of interior tube chamber, the interior tube chamber of described public female Luer and main cavity connects, the internal diameter of the main cavity that described upper and lower glue shell surrounds is greater than the inner hollow diameter of female female Luer of gluing shell, and described lower glue shell is provided with the passage of main cavity and ft connection, described elastic plug comprises the top be fixedly connected with in turn, stage portion and bottom, the interior cavity wall of the external wall of upper portion of described elastic plug and female female Luer of described gluing shell is fitted, the inside of described stage portion and bottom is the hollow structure be interconnected, the internal diameter of the hollow cavity that the maximum outside diameter of described stage portion and upper and lower glue shell surround coincide, the outer wall of the bottom of described elastic plug is set to corrugated, described top and stage portion junction are provided with lateral opening, described lateral opening is communicated with the hollow structure of bottom with stage portion, described elastic plug bottom is connected with the public female Luer of lower glue shell.
Preferably, medical Needleless barotropic joint of the present invention, the top of described elastic plug flushes with the top of female female Luer of described gluing shell.
Preferably, medical Needleless barotropic joint of the present invention, the top of described elastic plug comprises the interconnective first straight portion and the second straight portion, and the described second straight portion is connected with the stage portion of plug, and the external diameter in the described second straight portion is greater than the external diameter in the first straight portion.
Preferably, medical Needleless barotropic joint of the present invention, the inwall that stage portion and the described upper and lower glue shell of described elastic plug surround hollow cavity is fixedly connected with.
Preferably, medical Needleless barotropic joint of the present invention, being provided with cross section in the top of described elastic plug is the D font central blind hole that Open Side Down, and described cross section is the central blind hole of D font and the cavity connects of elastic plug bottom.
Preferably, medical Needleless barotropic joint of the present invention, the stage portion of described elastic plug be arranged with horizontal bar, the cross section that described horizontal bar is arranged on top in stage portion is the cavity side of D font.
Preferably, medical Needleless barotropic joint of the present invention, be provided with tube chamber, and top is set to a word or cross recess in the top of described elastic plug.
Preferably, medical Needleless barotropic joint of the present invention, the hollow cavity inwall that the stage portion of described elastic plug surrounds at upper and lower glue shell slides.
Preferably, medical Needleless barotropic joint of the present invention, be provided with tube chamber, and top is set to a word or cross recess in the top of described elastic plug.
Preferably, medical Needleless barotropic joint of the present invention, is provided with step above the public female Luer of described lower glue shell, on the step above the public female Luer that described lower glue shell is fixed in the bottom of described elastic plug.
Medical Needleless barotropic joint of the present invention, the cavity that the central authorities that upper and lower glue shell surrounds strengthen is referred to as main cavity, and female female Luer inner space of main cavity and gluing shell, main cavity is also communicated with the interior official jargon of the public female Luer of lower glue shell.During use, when external female Luer is inserted into female female Luer of gluing shell, elastic plug in the female female Luer of compressing gluing shell, elastic plug is out of shape bending downwards, thus unlatching liquid flow path, liquid enters into main cavity by the elastic plug upper outside of bending, then entered in the cavity in elastic plug by the lateral opening on elastic plug, then by the bottom of elastic plug, flow out from the interior conduit of the public female Luer of lower glue shell, at the end of use, when extracting the external male female Luer of the female female Luer being inserted into gluing shell, elastic plug reverts to original state, the volume of the main cavity outside extruding elastic plug, liquid in main cavity outside extruding elastic plug is entered the cavity in elastic plug by lateral opening, form one by the malleation of elastic plug to human body, prevent blood backflow blocking pipeline.Medical Needleless barotropic joint design of the present invention is simple, and in use procedure, liquid communication is more smooth and easy, drug residue free dead angle, and residual liquor amount is less, conveniently manufactures.
Accompanying drawing explanation
The present invention is further illustrated to utilize accompanying drawing, but the content in accompanying drawing does not form any limitation of the invention.
Fig. 1 is the longitdinal cross-section diagram of medical Needleless barotropic joint of the present invention in an embodiment;
Fig. 2 is longitdinal cross-section diagram when Needleless barotropic joint medical shown in Fig. 1 inserts external female Luer;
Fig. 3 is the structural representation of the elastic plug of Needleless barotropic joint medical shown in Fig. 1;
The structural representation of the A-A line that Fig. 4 is elastic plug shown in Fig. 3;
The axonometric chart at another visual angle of elastic plug shown in Fig. 5 Fig. 1;
Fig. 6 is the longitdinal cross-section diagram of medical Needleless barotropic joint of the present invention in another embodiment;
Fig. 7 is longitdinal cross-section diagram when Needleless barotropic joint medical shown in Fig. 6 inserts external female Luer;
Fig. 8 is the structural representation of the elastic plug of the medical Needleless barotropic joint shown in Fig. 6;
The cross-sectional view of the B-B line that Fig. 9 is the elastic plug shown in Fig. 8;
The cross-sectional view of the C-C line that Figure 10 is the elastic plug shown in Fig. 8;
Figure 11 is the longitdinal cross-section diagram of medical Needleless barotropic joint of the present invention in another embodiment;
Figure 12 is longitdinal cross-section diagram when Needleless barotropic joint medical shown in Figure 11 inserts external female Luer;
The structural representation of the elastic plug of the medical Needleless barotropic joint shown in Figure 13 Figure 11;
The cross-sectional view of the D-D line that Figure 14 is the elastic plug shown in Figure 13;
The cross-sectional view of the E-E line that Figure 15 is the elastic plug shown in Figure 13.
Description of reference numerals:
In Fig. 1-Fig. 5: elastic plug 11, erasable surface 111, central blind hole 112, top 113, lateral opening 114, maximum outside diameter step 115, plug bottom 116, cavity 117, horizontal bar 118, straight portion 121 of straight portion, D shape hole 119, first 120, second, gluing shell 12, lower glue shell 13, step 131, passage 132, public female Luer 133, main cavity 134; External female Luer 50.
In Fig. 6-Figure 10: elastic plug 21, gluing shell 22, lower glue shell 23, erasable surface 211, otch 212, centre bore 213, maximum step 214, cavity 215, plug top diameter 216, main cavity 231, public female Luer 232, passage 233, lateral opening 215,
In Figure 11-Figure 15, elastic plug 31, maximum step 311, cavity 312, gluing shell 32, lower glue shell 33, external female Luer 50.
Detailed description of the invention
The invention will be further described with the following Examples,
Embodiment one,
As Figure 1-5, described gluing shell 12 and lower glue shell 13 are all hollow structure, gluing shell 12 bottom is connected with lower glue shell 13 top photocuring, upper and lower glue shell surrounds main cavity 134, the top of described gluing shell 12 is provided with female female Luer, described female female Luer is communicated with main cavity 134, described lower glue shell 13 bottom is provided with the public female Luer 133 of tube chamber in band, the interior tube chamber of described public female Luer 133 is communicated with main cavity 134, the internal diameter of the main cavity 134 that described upper and lower glue shell surrounds is greater than the inner hollow diameter of female female Luer of gluing shell 12, described lower glue shell 13 is provided with the passage 132 of main cavity 134 and ft connection.As in Figure 3-5, described elastic plug 11 comprises the top 113 be fixedly connected with in turn, stage portion 115 and bottom 116, the inner chamber inner wall sealing of the external wall of upper portion of described elastic plug 11 and female female Luer of described gluing shell 12 is fitted, the inside of described stage portion 115 and bottom 116 is the hollow structure be interconnected, the internal diameter of the main cavity that the maximum outside diameter of described stage portion 115 and upper and lower glue shell surround coincide (fixed seal connection), the outer wall of the bottom 116 of described elastic plug 11 is set to corrugated, described top and stage portion junction are provided with lateral opening 114, described lateral opening 114 is communicated with the hollow structure of stage portion 115 with bottom 116, described elastic plug bottom 116 is fixedly connected with the public female Luer 133 of lower glue shell 13.The top of described elastic plug 11 flushes with the top of female female Luer of described gluing shell 12, forms erasable surface 111, such convenient sterilizing wiping.As shown in Figure 3, the top 113 of described elastic plug comprises the interconnective first straight portion 120 and the second straight portion 121, described second straight portion 121 is connected with the stage portion 115 of plug, the external diameter in the described second straight portion 121 is greater than the external diameter in the first straight portion 120, first straight portion 120 and the second straight portion 121 fit female female Luer inwall, auxiliary seal effect is played in first straight portion 120, and main seal effect is played in the second straight portion 121.The inwall that stage portion 115 and the described upper and lower glue shell of described elastic plug 11 surround main cavity is fixedly connected with, or the stage portion of elastic plug 11 is fixed on gluing shell and lower glue shell junction.Being provided with cross section in the top 113 of described elastic plug 11 is the D font central blind hole that Open Side Down 112, and described cross section is the central blind hole 112 of D font and the cavity connects of elastic plug 11 bottom 116.As shown in Figure 3 and Figure 5, the below of the stage portion of described elastic plug 11 is provided with horizontal bar 118, and described horizontal bar 118 is arranged on central blind hole 112 side on top in stage portion.
Upper and lower glue shell is by nontoxic high molecular weight plastic material injection molding, and gluing shell head comprises a female female Luer, and lower glue shell comprises a public female Luer, and upper and lower glue shell is gluing together charge-coupled by UV, forms the tract of a hollow.Elastic plug is assembled in upper and lower glue hull shape and becomes in hollow channel, and elastic plug is made up of non-toxic high molecular elastomeric material, such as: silicone rubber.When female Luer accesses, plug pressurized generation bending distortion can open fluid path.Plug contains a downward opening central blind hole and larger-diameter middle part (stage portion).Plug top has smooth surface, convenient sterilizing and a wiping.The top of plug and the surface of internal cavity of gluing shell coincide, dead space hardly containing liquor residue, it has one section of straight portion that can seal (the first straight portion and the second straight portion), connect the lateral opening of plug central blind hole 119 (D shape hole) from outer surface containing one group (or many groups) at straight subordinate's end, thus the fluid path that can be formed from plug outer surface to central blind hole 119, a D shape hole is contained in plug cross section, lateral opening top.In the middle part of plug, the outer diameter of step of large-size becomes to seal with glue hull shape, and this sealing can make the form of fixing seal, and it, when the stressed lower compressive strain of plug, can remain the sealing between fluid path and glue shell.
When external female Luer 50 is inserted, plug is out of shape downwards, due under the D shape blind hole 119 of homonymy and the effect of muscle 118, plug produces bending, thus unlatching liquid flow path, as shown in Figure 2, the cavity 117 simultaneously stretched between formation and glue shell downwards in the middle part of plug, plug bottom 116 is similar to the spring-like compressed by being pressed into, when transfusion completes, when recalling external female Luer 50, plug is returned to origin-location under the promotion of its own resilient, liquid in cavity 117 is pushed into the pipeline in plug, forms the flowing of a forward.
The tube wall of elastic plug bottom 116 is set to corrugated namely in spring-like structures, the spring-like of meeting shrinkage when elastic plug presses down, and allows plug reset when providing enough resilience forces to recall for pressure.Elastic plug bottom and lower glue shell 13 are formed and seal, and its central blind hole 119 connects with the mesopore (official jargon of public female Luer) of lower glue shell, form the fluid path from elastic plug 11 to the public female Luer 133 of lower glue shell.Described lower glue shell contains one or more and leads to outside steam vent 132, and steam vent 132 position distribution is outside plug lower outer diameter, and during for discharging compressive strain under plug, plug 11 is outside with the air in lower glue shell 13 gap.
Embodiment two
As illustrated in figures 6-10, in this preferred embodiment, described gluing shell 22 and lower glue shell 23 are all hollow structure, gluing shell 22 bottom is connected with lower glue shell 23 top photocuring, upper and lower glue shell surrounds main cavity 231, the top of described gluing shell 22 is provided with female female Luer, described female female Luer is communicated with main cavity 231, described lower glue shell bottom is provided with the public female Luer 232 of tube chamber in band, the interior tube chamber of described public female Luer 232 is communicated with main cavity 231, the internal diameter of the main cavity 231 that described upper and lower glue shell surrounds is greater than the inner hollow diameter of female female Luer of gluing shell 22, described lower glue shell 23 is provided with the passage 233 of main cavity 231 and ft connection, described elastic plug 21 comprises the top be fixedly connected with in turn, stage portion 214 and bottom, the interior cavity wall of the external wall of upper portion of described elastic plug and female female Luer of described gluing shell 22 is fitted, the inside of described stage portion 214 and bottom is the hollow structure be interconnected, the internal diameter of the hollow cavity that the maximum outside diameter of described stage portion 214 and upper and lower glue shell surround coincide, the outer wall of the bottom of described elastic plug is set to corrugated, described top and stage portion junction are provided with lateral opening 215, described lateral opening 215 is communicated with the hollow structure of bottom with stage portion 214, described elastic plug bottom is connected with the public female Luer of lower glue shell 23.The top of described elastic plug 11 flushes with the top of female female Luer of described gluing shell, and formation center is the erasable surface 211 of arc, such convenient sterilizing wiping.The top of described elastic plug comprises the interconnective first straight portion and the second straight portion, described second straight portion is connected with the stage portion of plug, the external diameter in the described second straight portion is greater than the external diameter in the first straight portion, first straight portion and the second straight portion fit female female Luer inwall, auxiliary seal effect is played in first straight portion, and main seal effect is played in the second straight portion.Be provided with tube chamber 213 in the top of described elastic plug, and top is set to cross recess 212.Step is provided with, on the step above the public female Luer that described lower glue shell is fixed in the bottom of described elastic plug above the public female Luer of described lower glue shell.
With the D shape blind hole of embodiment one unlike, the erasable surface at plug top is made and is comprised a word (or cross) otch 212, the form containing a centre bore 213 is directly made in plug cross section, and top otch can extend through the top of described centre bore 213 always.
Arc 211 is designed at the erasable end face of plug 21, and arrange " one " word or " ten " otch 212 of word, change the D shape hole in the cross section, plug top in embodiment 1 into centre bore 213, allow " one " word or " ten " word otch is by the end face of described centre bore, plug top diameter 216 and gluing shell top drilling get interference fit, the cut closure at compressing plug top, play sealing function, when female Luer accesses, plug pressurized is out of shape downwards, joint extruding plug arc top surface 211, otch is opened, thus starting fluid path, as shown in Figure 7, the cavity 215 that in the middle part of plug, larger diameter 214 (stage portion) stretches between formation and glue shell downwards simultaneously, plug lower compression becomes similar to the spring-like compressed., when transfusion completes, when recalling female Luer, plug is returned to origin-location under the promotion of its own resilient. and the liquid in described cavity 215 is pushed into pipeline, form the flowing of a forward.
Embodiment three
As Figure 11-15, described gluing shell 32 and lower glue shell 33 are all hollow structure, gluing shell 32 bottom is connected with lower glue shell 33 top photocuring, upper and lower glue shell 33 surrounds main cavity, the top of described gluing shell 32 is provided with female female Luer, described female female Luer and main cavity connects, described lower glue shell 33 bottom is provided with the public female Luer of interior tube chamber, the interior tube chamber of described public female Luer and main cavity connects, the internal diameter of the main cavity that described upper and lower glue shell 33 surrounds is greater than the inner hollow diameter of female female Luer of gluing shell 32, described lower glue shell 33 is provided with the passage of main cavity and ft connection, described elastic plug 31 comprises the top be fixedly connected with in turn, stage portion and bottom, the interior cavity wall of the external wall of upper portion of described elastic plug 31 and female female Luer of described gluing shell 32 is fitted, the inside of described stage portion and bottom is the hollow structure be interconnected, the internal diameter of the hollow cavity that the maximum outside diameter of described stage portion and upper and lower glue shell 33 surround coincide, the outer wall of the bottom of described elastic plug 31 is set to corrugated, described top and stage portion junction are provided with lateral opening, described lateral opening is communicated with the hollow structure of bottom with stage portion, described elastic plug 31 bottom is connected with the public female Luer of lower glue shell 33.The top of described elastic plug 31 flushes with the top of female female Luer of described gluing shell 32, such convenient sterilizing wiping.The top of described elastic plug 31 comprises the interconnective first straight portion and the second straight portion, described second straight portion is connected with the stage portion of plug, the external diameter in the described second straight portion is greater than the external diameter in the first straight portion, first straight portion and the second straight portion fit female female Luer inwall, auxiliary seal effect is played in first straight portion, and main seal effect is played in the second straight portion.The hollow cavity inwall that the stage portion of described elastic plug 31 surrounds at upper and lower glue shell 33 slides.Be provided with tube chamber in the top of described elastic plug 31, and top is set to cross recess.Step is provided with, on the step above the public female Luer that described lower glue shell 33 is fixed in the bottom of described elastic plug 31 above the public female Luer of described lower glue shell 33.
With embodiment two unlike, in the middle part of the present embodiment three Elastic plug 31, step 311 external diameter of large-size becomes to seal with glue hull shape, the form of slipper seal is made in this sealing, and it, when the stressed lower compressive strain of plug, can remain the sealing between fluid path and glue shell.
Embodiment three changes maximum gauge in the middle part of plug 311 and the fixing seal form of glue shell into slipper seal form based on the basis of embodiment two, gluing shell 32 and lower glue shell 33 are solidified togather by UV, form the passage of hollow, plug 31 is assembled in described passage, larger mid diameter 311 and the upper and lower glue shell hollow channel of plug 31 adopt the structure of slipper seal, when female Luer 50 accesses, plug pressurized deforms downwards, otch opens, open fluid path, in the middle part of plug, larger diameter 311 moves down simultaneously, form the cavity 312 with glue shell, but keep the sealing with glue shell simultaneously.As shown in figure 12, when transfusion complete recall female Luer 50 time, plug is returned to original position in the effect of elastic force, and the liquid in cavity 312 is pushed to the flowing that pipeline forms a forward, reaches the object of placing blood backflow blocking pipeline.
Glue shell of the present invention and plug preferred cross-sections are circle, the more convenient operation at automatic Composition line.The present invention is by the size ratio of adjustment setting maximum outside diameter with plug central blind hole, obtain the malleation flow of different size, even in some transfusion occasion without malleation demand, can make " 0 " pressure condition, namely without malleation, also without the form of negative pressure, such patient is in the access of female Luer and do not have obvious pain perception when recalling.Present invention employs the structure of through type, liquid flow is more unobstructed.Plug and glue shell cavity surface are coincide, and reduce liquor residue amount.Structure is simple, is convenient to manufacture.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention but not limiting the scope of the invention; although be explained in detail the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.

Claims (10)

1. a medical Needleless barotropic joint, is characterized in that, comprises gluing shell, lower glue shell and elastic plug;
Described gluing shell and lower glue shell are all hollow structure, gluing shell bottom is connected with lower glue shell top photocuring, upper and lower glue shell surrounds main cavity, the top of described gluing shell is provided with female female Luer, described female female Luer and main cavity connects, described lower glue shell bottom is provided with the public female Luer of tube chamber in band, the interior tube chamber of described public female Luer and main cavity connects, the internal diameter of the main cavity that described upper and lower glue shell surrounds is greater than the inner hollow diameter of female female Luer of gluing shell, and described lower glue shell is provided with the passage of main cavity and ft connection;
Described elastic plug comprises the top be fixedly connected with in turn, stage portion and bottom, the interior cavity wall of the external wall of upper portion of described elastic plug and female female Luer of described gluing shell is fitted, the inside of described stage portion and bottom is the hollow structure be interconnected, the internal diameter of the hollow cavity that the maximum outside diameter of described stage portion and upper and lower glue shell surround coincide, the outer wall of the bottom of described elastic plug is set to corrugated, described top and stage portion junction are provided with lateral opening, described lateral opening is communicated with the hollow structure of bottom with stage portion, described plug bottom is connected with the public female Luer of lower glue shell.
2. medical Needleless barotropic joint as claimed in claim 1, is characterized in that, the top of described elastic plug flushes with the top of female female Luer of described gluing shell.
3. medical Needleless barotropic joint as claimed in claim 2, it is characterized in that, the top of described elastic plug comprises the interconnective first straight portion and the second straight portion, and the described second straight portion is connected with the stage portion of plug, and the external diameter in the described second straight portion is greater than the external diameter in the first straight portion.
4. medical Needleless barotropic joint as claimed in claim 3, is characterized in that, the inwall that stage portion and the described upper and lower glue shell of described elastic plug surround hollow cavity is fixedly connected with.
5. medical Needleless barotropic joint as claimed in claim 4, it is characterized in that, being provided with cross section in the top of described elastic plug is the D font central blind hole that Open Side Down, and described cross section is the central blind hole of D font and the cavity connects of elastic plug bottom.
6. medical Needleless barotropic joint as claimed in claim 5, is characterized in that, the stage portion of described elastic plug be arranged with horizontal bar, the cross section that described horizontal bar is arranged on top in stage portion is the cavity side of D font.
7. medical Needleless barotropic joint as claimed in claim 4, it is characterized in that, be provided with tube chamber in the top of described elastic plug, and top is set to a word or cross recess.
8. medical Needleless barotropic joint as claimed in claim 3, is characterized in that, the hollow cavity inwall that the stage portion of described elastic plug surrounds at upper and lower glue shell slides.
9. medical Needleless barotropic joint as claimed in claim 8, it is characterized in that, be provided with tube chamber in the top of described elastic plug, and top is set to a word or cross recess.
10. medical Needleless barotropic joint as claimed in claim 1, is characterized in that, is provided with step above the public female Luer of described lower glue shell, on the step above the public female Luer that described lower glue shell is fixed in the bottom of described elastic plug.
CN201510260603.XA 2015-05-20 2015-05-20 Medical needleless positive pressure joint Pending CN104815365A (en)

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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
CN107626037A (en) * 2016-07-18 2018-01-26 蔡溪进 Pressure-fired exempts from pin medical connector
WO2021104519A1 (en) * 2019-11-28 2021-06-03 无锡耐思生命科技股份有限公司 Spraying assembly

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CN101195054A (en) * 2007-11-21 2008-06-11 张亚平 Non-needle positive pressure enclosed transfusion joint valve
CN201263811Y (en) * 2008-09-22 2009-07-01 乐普(北京)医疗器械股份有限公司 Positive-pressure joint for infusion without needle
CN101912664A (en) * 2010-05-21 2010-12-15 成都普什医药塑料包装有限公司 Disposable positive pressure joint
CN103153375A (en) * 2010-10-12 2013-06-12 查尔斯·霍坎森 Medical valve assembly
CN101961514A (en) * 2010-10-29 2011-02-02 李丹青 Integrated bacteria-proof needle-less airtight infusion joint
CN204671650U (en) * 2015-05-20 2015-09-30 宁湘龙 A kind of medical Needleless barotropic joint

Cited By (3)

* Cited by examiner, † Cited by third party
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
CN107626037A (en) * 2016-07-18 2018-01-26 蔡溪进 Pressure-fired exempts from pin medical connector
WO2021104519A1 (en) * 2019-11-28 2021-06-03 无锡耐思生命科技股份有限公司 Spraying assembly

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Application publication date: 20150805