CN110897885A

CN110897885A - Liquid medicine transfer adapter

Info

Publication number: CN110897885A
Application number: CN201911333013.XA
Authority: CN
Inventors: 李思进; 刘海燕
Original assignee: Shanxi Medical University
Current assignee: Shanxi Medical University
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-03-24

Abstract

The application provides a liquid medicine shifts adapter belongs to liquid medicine transfer device field. The liquid medicine transferring adapter comprises a butt joint seat, a puncture needle and an expansion air bag. The butt joint seat is used for butt joint with a penicillin bottle. The puncture needle is provided with an air inlet, a needle point air outlet, a liquid inlet and a liquid outlet, wherein the air inlet is communicated with the needle point air outlet to form an air passage, and the liquid inlet is communicated with the liquid outlet to form a liquid passage. The expansion air bag is positioned in the air passage, and the expansion air bag is in sliding sealing fit with the inner wall of the air passage. When the puncture needle is inserted into the penicillin bottle, the needle point air outlet and the needle point liquid inlet are both positioned in the penicillin bottle, and the air inlet and the liquid outlet are both positioned outside the penicillin bottle. The liquid medicine transferring adapter can balance the air pressure inside and outside the penicillin bottle, so that reagent can be injected into the penicillin bottle and liquid medicine in the penicillin bottle can be pumped out more easily.

Description

Liquid medicine transfer adapter

Technical Field

The application relates to and belongs to liquid medicine transfer device field, particularly relates to a liquid medicine transfer adapter.

Background

When dry medicinal powder filled in a penicillin bottle is required to be used, a reagent is generally injected into the penicillin bottle through a syringe, the dry medicinal powder is fully dissolved in the reagent, and then the mixed medicinal liquid in the penicillin bottle is pumped out through the syringe. When the liquid medicine in the penicillin bottle is pumped out, the penicillin bottle is gradually in a negative pressure state along with the gradual pumping of the liquid medicine, so that the liquid medicine is difficult to pump out.

Disclosure of Invention

The embodiment of the application provides a liquid medicine shifts adapter to improve the problem of taking out liquid medicine difficulty in the xiLin bottle.

The embodiment of the application provides a liquid medicine transfer adapter, which comprises a butt joint seat, a puncture needle and an expansion air bag, wherein the butt joint seat is used for being in butt joint with a penicillin bottle;

the puncture needle is provided with an air inlet, a needle point air outlet, a liquid inlet and a liquid outlet, the air inlet is communicated with the needle point air outlet to form an air passage, and the liquid inlet is communicated with the liquid outlet to form a liquid passage; when the puncture needle is inserted into the penicillin bottle, the needle point air outlet and the liquid inlet are both positioned in the penicillin bottle, and the air inlet and the liquid outlet are both positioned outside the penicillin bottle;

the expansion air bag is positioned in the air passage, and the expansion air bag is in sliding sealing fit with the inner wall of the air passage.

Among the above-mentioned technical scheme, during the use, butt joint seat and xiLin bottle butt joint cooperation, pjncture needle insert xiLin bottle for needle point gas outlet and inlet all are located xiLin bottle, and air inlet and liquid outlet all are located xiLin bottle outside. When reagent needs to be injected into the penicillin bottle, the needle head of the injector is inserted into the liquid outlet, when the piston rod of the injector is pushed, the reagent in the injector enters the penicillin bottle through the liquid path channel, and after the injector is pulled out, the butt joint seat and the penicillin bottle can be shaken together due to butt joint matching of the butt joint seat and the penicillin bottle, so that the reagent and dry medicinal powder in the penicillin bottle are fully mixed. When the mixed liquid medicine in the penicillin bottle needs to be pumped out, the needle head of the injector is inserted into the liquid outlet again, and when the piston rod of the injector is pulled, the liquid medicine in the penicillin bottle enters the injector through the liquid path channel. In the process of injecting the reagent into the west forest bottle, the gas in the west forest bottle pushes the expansion air bag to move, the expansion air bag is expanded in the gas path channel, the air pressure in the west forest bottle cannot be basically increased, and the injector is easier to inject the reagent into the west forest bottle; in the process of extracting the liquid medicine in the penicillin bottle, the external air enters the air passage channel from the air inlet to push the expansion air bag to move, the expansion air bag expands in the penicillin bottle, the air pressure in the penicillin bottle cannot be reduced basically, and the injector is easier to extract the liquid medicine in the penicillin bottle. The liquid medicine transferring adapter can balance the air pressure inside and outside the penicillin bottle, so that reagent can be injected into the penicillin bottle and liquid medicine in the penicillin bottle can be pumped out more easily. In addition, because the inflation gasbag forms sliding fit with the inner wall of air passage way for the inflation gasbag can remove in the air passage way, makes at the in-process of taking out the liquid medicine in the xiLin bottle, and the inflation gasbag can get into in the xiLin bottle, so that the inflation gasbag fully expands in the xiLin bottle. Because the expansion air bag is in sealing fit with the inner wall of the air channel, when reagent is injected into the west forest bottle, the reagent and the dry medicinal powder cannot flow out of the air channel; when the liquid medicine in the penicillin bottle is pumped out, outside air can not enter the penicillin bottle through the air passage, so that the liquid medicine is prevented from being polluted.

In addition, the medical fluid transfer adapter according to the embodiment of the present application further has the following additional technical features:

in some embodiments of the present application, the inflatable balloon comprises a balloon and a slip ring connected to an opening of the balloon;

the slip ring and the inner wall of the air passage channel form sliding sealing fit.

Among the above-mentioned technical scheme, connect and form the sliding seal cooperation in the open-ended sliding ring of utricule and the inner wall of gas circuit passageway, this kind of structure makes the inflation gasbag have fine sliding property in the gas circuit passageway in addition, still makes to have fine leakproofness between the inner wall of inflation gasbag and gas circuit passageway.

In some embodiments of the present application, a first limiting portion is disposed in the air passage channel, and the first limiting portion is configured to limit the sliding ring from separating from the puncture needle from the needle tip air outlet.

Among the above-mentioned technical scheme, first spacing portion has the effect that the restriction sliding ring removed, and at the in-process of taking out the liquid medicine in the xiLin bottle, the sliding ring is then no longer moving with first spacing portion contact back, prevents that the sliding ring from breaking away from the pjncture needle from the needle point gas outlet.

In some embodiments of the present application, a second position-limiting portion is disposed in the gas path channel and spaced from the first position-limiting portion;

the slip ring can slide between the first limiting portion and the second limiting portion.

Among the above-mentioned technical scheme, the spacing portion of second has the effect that the restriction sliding ring removed for the sliding ring can only slide between first spacing portion and the spacing portion of second. In the process of injecting the reagent into the west forest bottle, the slip ring does not move continuously after contacting with the second limiting part.

In some embodiments of the present application, the inflatable balloon further comprises an auxiliary constriction structure assisting retraction of the balloon into the air passage channel.

Among the above-mentioned technical scheme, the inflatable air bag still includes supplementary constriction structure, and supplementary constriction structure can make the utricule shrink to the gas circuit passageway more easily.

In some embodiments of the present application, the secondary constriction structure comprises a plurality of resilient tabs circumferentially spaced apart from the slip ring;

the plurality of elastic sheets are wrapped on the outer side of the capsule body.

Among the above-mentioned technical scheme, supplementary constriction structure includes that axial interval arranges in the sliding ring and wraps up in a plurality of shell fragments in the utricule outside, at the in-process of the liquid medicine in the extraction xiLin bottle, the utricule will expand in xiLin bottle, and the expansion utricule makes each shell fragment take place elastic deformation and outwards open. After the liquid medicine in the penicillin bottle is pumped out, when the puncture needle is pulled out of the penicillin bottle, and the rubber plug of the bottle mouth of the penicillin bottle is in contact with each elastic sheet, because each elastic sheet is in an open state, the external air enters the penicillin bottle from the gap between the elastic sheet and the elastic sheet, the capsule body is gradually reduced, and the capsule body is gradually retracted into the air channel by the elastic sheet under the action of the self elasticity and the extrusion force of the rubber plug of the penicillin bottle in the process of pulling out the puncture needle.

In some embodiments of the present application, the elastic piece includes a first bent portion and a second bent portion arranged at an obtuse angle;

one end of the first bending part is connected with the second bending part, and the other end of the first bending part is connected with the slip ring.

Among the above-mentioned technical scheme, the first kink and the second kink of shell fragment are the obtuse angle setting, and this kind of structure makes the shell fragment have bigger elastic force after expanding because of the utricule inflation, makes the utricule with easy retraction in the gas circuit passageway. In addition, the structure enables the free end of each second bending part to be located on a smaller circumference, namely the free end of the whole auxiliary shrinkage structure forms a pointed shape, so that the capsule body can more easily extend out of the air channel into the penicillin bottle.

In some embodiments of the present application, the secondary constriction structure comprises a plurality of resilient stiffeners circumferentially spaced about the balloon;

the rigidity of the elastic reinforcing ribs is greater than that of the capsule body.

Among the above-mentioned technical scheme, arrange the rigidity that is greater than the utricule in the elasticity strengthening rib of utricule, elasticity strengthening rib takes place elasticity deformation back bigger elasticity promptly, and the utricule expands the back in xiLin bottle, can make the utricule retract more easily in the gas circuit passageway under the effect of elasticity strengthening rib.

In some embodiments of the present application, the introducer needle includes a hollow needle body and a separator;

the liquid outlet and the needle point air outlet are respectively arranged at two ends of the hollow needle body, and the air inlet and the liquid inlet are both arranged on the peripheral wall of the hollow needle body;

the separating body is arranged in the hollow needle body and separates the inner space of the hollow needle body into the air passage channel and the liquid passage channel.

Among the above-mentioned technical scheme, the pjncture needle includes hollow needle body and separator, and the separator is located in the hollow needle body to separate the inner space of hollow needle body for gas circuit passageway and liquid circuit passageway, the pjncture needle simple structure of this kind of structure, the shaping manufacturing of being convenient for.

In some embodiments of the present application, the docking station is provided with a hole penetrating through a peripheral wall thereof, and the hole is communicated with the air inlet;

the liquid medicine transfer adapter further comprises an elastic ring, and the elastic ring is sleeved on the outer side of the butt joint seat and used for plugging one end, penetrating through the peripheral wall of the butt joint seat, of the pore passage.

In the above technical scheme, the elastic ring plays a role in plugging the pore channel, and prevents external gas or liquid from entering the air inlet from the pore channel. When the liquid medicine shifts the adapter and need not use, accessible elastic ring is with the pore shutoff, avoids in external gas or the liquid entering to the gas circuit passageway, has improved the life of inflation gasbag.

In some embodiments of the present application, the medical fluid transfer adapter further comprises a rubber stopper and a blocking cap;

the rubber plug is plugged in the liquid outlet, and the plugging cover is in threaded connection with the butt joint seat so as to limit the rubber plug between the plugging cover and the butt joint seat;

the blocking cover is provided with a through hole through which a needle of the syringe can pierce the rubber plug and enter the liquid path channel from the liquid outlet.

Among the above-mentioned technical scheme, the effect of rubber buffer is the shutoff liquid outlet, and the effect of shutoff lid is firm in liquid outlet department with the rubber buffer. When a reagent needs to be injected into the penicillin bottle or liquid medicine in the penicillin bottle needs to be pumped out, the needle head of the injector pierces the rubber plug from the through hole of the sealing cover to enter the liquid passage, and the needle head of the injector forms sealing fit with the rubber plug to prevent liquid leakage.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic structural view of a medical fluid transfer adapter with an inflatable bladder disposed in an air passage according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of the medical fluid transfer adapter when the inflatable bladder is inflated outside the airway passage according to the embodiment of the present disclosure;

FIG. 3 is a schematic diagram illustrating operation of a medical fluid transfer adapter according to an embodiment of the present application;

FIG. 4 is a schematic view of an inflatable bladder according to other embodiments of the present application.

Icon: 100-liquid medicine transfer adapter; 10-a docking station; 11-butting blind holes; 12-mounting holes; 13-a receiving hole; 14-a duct; 15-an annular groove; 20-puncture needle; 21-an air inlet; 22-needle point air outlet; 23-liquid inlet; 24-a liquid outlet; 25-gas path channel; 251-a first limiting part; 252-a second limit part; 26-a liquid path channel; 27-a hollow needle body; 28-a separator; 30-inflating the balloon; 31-a capsule body; 32-a slip ring; 33-a spring plate; 331-a first bending part; 332-a second bend; 34-elastic reinforcing ribs; 40-rubber plug; 50-plugging cover; 51-a through hole; 60-an elastic ring; 200-penicillin bottles.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first" and "second" are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Examples

The embodiment of the application provides a liquid medicine shifts adapter 100, can balance the interior outer atmospheric pressure of xiLin bottle 200 for it is easier to inject reagent and take out liquid medicine in xiLin bottle 200 into xiLin bottle 200. The structure of medical fluid transfer adapter 100 will be described in detail below with reference to fig. 1-4.

As shown in fig. 1 and 2, the medical fluid transfer adapter 100 includes a docking station 10, a puncture needle 20, and an inflatable balloon 30. The docking station 10 is used for docking with the penicillin bottle 200. The puncture needle 20 is provided with an air inlet 21, a needle point air outlet 22, a liquid inlet 23 and a liquid outlet 24, wherein the air inlet 21 is communicated with the needle point air outlet 22 to form an air passage 25, and the liquid inlet 23 is communicated with the liquid outlet 24 to form a liquid passage 26. The inflatable air bag 30 is positioned in the air passage 25, and the inflatable air bag 30 is in sliding sealing fit with the inner wall of the air passage 25. When the puncture needle 20 is inserted into the vial 200, the needle tip air outlet 22 and the needle tip liquid inlet 23 are both located inside the vial 200, and the air inlet 21 and the liquid outlet 24 are both located outside the vial 200.

When in use, as shown in fig. 3, the docking seat 10 is in docking fit with the vial 200, the puncture needle 20 is inserted into the vial 200 from the rubber stopper at the vial opening of the vial 200, so that the needle tip air outlet 22 and the needle tip liquid inlet 23 are both located in the vial 200, and the air inlet 21 and the liquid outlet 24 are both located outside the vial 200.

When reagent needs to be injected into the penicillin bottle 200, the needle head of the injector is inserted into the liquid outlet 24, when the piston rod of the injector is pushed, the reagent in the injector enters the penicillin bottle 200 through the liquid path channel 26, after the injector is pulled out, the butt joint seat 10 is in butt joint fit with the penicillin bottle 200, the butt joint seat 10 and the penicillin bottle 200 can be shaken together, and the reagent and dry medicinal powder in the penicillin bottle 200 are fully mixed. When the mixed liquid medicine in the penicillin bottle 200 needs to be pumped out, the needle of the syringe is inserted into the liquid outlet 24 again, and when the piston rod of the syringe is pulled, the liquid medicine in the penicillin bottle 200 enters the syringe through the liquid path passage 26. In the process of injecting the reagent into the west forest bottle 200, the gas in the penicillin bottle 200 pushes the expansion airbag 30 to move, the expansion airbag 30 expands in the gas path channel 25, the gas pressure in the penicillin bottle 200 cannot be basically increased, and the injector is easier to inject the reagent into the west forest bottle 200; in the process of pumping the liquid medicine in the penicillin bottle 200, the external air enters the air passage 25 from the air inlet 21 to push the inflatable air bag 30 to move, and the inflatable air bag 30 is inflated in the penicillin bottle 200, so that the air pressure in the penicillin bottle 200 is basically not reduced, and the injector is easier to pump the liquid medicine in the penicillin bottle 200. The liquid medicine transferring adapter 100 can balance the air pressure inside and outside the penicillin bottle 200, so that the reagent can be injected into the penicillin bottle 200 and the liquid medicine in the penicillin bottle 200 can be extracted more easily.

In addition, because the inflatable airbag 30 forms a sliding fit with the inner wall of the air passage 25, the inflatable airbag 30 can move in the air passage 25, so that the inflatable airbag 30 can enter the penicillin bottle 200 in the process of pumping out the liquid medicine in the penicillin bottle 200, and the inflatable airbag 30 can be fully inflated in the penicillin bottle 200. Because the expansion air bag 30 is in sealing fit with the inner wall of the air channel 25, when reagent is injected into the west forest bottle 200, the reagent and dry medicinal powder cannot flow out of the air channel 25; when the liquid medicine in the penicillin bottle 200 is pumped out, the outside air can not enter the penicillin bottle 200 through the air passage 25, so that the liquid medicine is prevented from being polluted.

The needle point air outlet 22 is an air outlet provided at the needle point of the puncture needle 20.

The docking station 10 is used for docking with the penicillin bottle 200, and the docking station 10 can be in various structures. In this embodiment, the docking seat 10 is a cylindrical structure, and a docking blind hole 11 is disposed at one axial end of the docking seat 10. Be equipped with mounting hole 12 on the butt joint seat 10, mounting hole 12 and the coaxial setting of butt joint blind hole 11, the aperture of mounting hole 12 is less than the aperture of butt joint blind hole 11, the one end and the butt joint blind hole 11 intercommunication of mounting hole 12.

One end of the puncture needle 20 far away from the needle tip is inserted into the mounting hole 12 of the docking seat 10 to realize the connection of the puncture needle 20 and the docking seat 10. The puncture needle 20 and the docking station 10 may be fixed together by means of adhesion, or the puncture needle 20 and the mounting hole 12 may be fixed together by forming an interference fit. The needle point of the puncture needle 20 penetrates out of the butt blind hole 11 and is positioned outside the butt seat 10.

When the butt joint seat 10 is in butt joint with the penicillin bottle 200, the needlepoint of the puncture needle 20 pierces the rubber plug at the bottle mouth of the penicillin bottle 200 and enters the penicillin bottle 200, the bottle mouth end of the penicillin bottle 200 is inserted into the butt joint blind hole 11 of the butt joint seat 10, and the penicillin bottle 200 and the butt joint seat 10 form a tight fit.

It should be noted that the docking cradle 10 may be made of various materials, such as copper, iron, aluminum, rubber, plastic, etc.

With continued reference to fig. 1, a liquid outlet 24 is provided at an end of the puncture needle 20 remote from the needle tip, and a liquid inlet 23 and a gas inlet 21 are provided on a peripheral wall of the puncture needle 20.

Further, the medical fluid transferring adapter 100 further comprises a rubber plug 40 and a sealing cover 50, wherein the rubber plug 40 is sealed at the fluid outlet 24, and the sealing cover 50 is screwed to the docking station 10 to limit the rubber plug 40 between the sealing cover 50 and the docking station 10. The closure cap 50 is provided with a through hole 51 through which the needle of the syringe penetrates the rubber stopper 40 and enters the liquid passage 26 from the liquid outlet 24.

The rubber stopper 40 is used for blocking the liquid outlet 24, and the blocking cover 50 is used for stabilizing the rubber stopper 40 at the liquid outlet 24. When a reagent needs to be injected into the penicillin bottle 200 or a liquid medicine in the penicillin bottle 200 needs to be pumped out, the needle of the syringe penetrates through the rubber plug 40 from the through hole 51 of the blocking cover 50 and enters the liquid passage 26, and the needle of the syringe is in sealing fit with the rubber plug 40, so that the liquid leakage phenomenon is prevented.

Wherein, the end of the docking seat 10 far away from the blind docking hole 11 is provided with a receiving hole 13, and the receiving hole 13 is communicated with the blind docking hole 11 through a mounting hole 12. The rubber plug 40 is accommodated in the accommodating hole 13, the end of the puncture needle 20 provided with the liquid outlet 24 is pressed against the rubber plug 40, and the blocking cover 50 restricts the rubber plug 40 in the accommodating hole 13. Illustratively, the rubber stopper 40 is cylindrical, and the diameter of the rubber stopper 40 matches the diameter of the receiving hole 13.

An external thread is arranged on the butt joint seat 10, and an internal thread matched with the external thread on the butt joint seat 10 is arranged on the plugging cover 50. The internal thread of the plugging cover 50 is matched with the external thread on the butt joint seat 10, so that the plugging cover 50 is in threaded connection with the butt joint seat 10, the plugging cover 50 can be conveniently detached by the structure, and the rubber plug 40 can be conveniently replaced. The through hole 51 is arranged at the central position of the blocking cover 50, after the blocking cover 50 is screwed on the butt joint seat 10, the through hole 51 is aligned with the liquid outlet 24, and the two are separated by the rubber plug 40.

It should be noted that, in other embodiments, the blocking cover 50 may not be provided, and the rubber plug 40 and the docking seat 10 may be directly connected together, for example, the rubber plug 40 is connected with the docking seat 10 by an adhesive, or the rubber plug 40 and the receiving hole 13 form an interference fit to connect the two together.

In addition, the docking cradle 10 is provided with a duct 14 penetrating through the peripheral wall thereof, and the duct 14 is communicated with the air inlet 21, i.e. the external air can enter into the air passage channel 25 through the through hole 51.

Wherein the duct 14 is arranged in radial direction of the docking station 10.

Optionally, the medical fluid transferring adaptor 100 further comprises an elastic ring 60, the elastic ring 60 is sleeved on the duct 14 penetrating through the peripheral wall thereof, and the elastic ring 60 is sleeved outside the docking seat 10 and is used for blocking one end of the duct 14 penetrating through the peripheral wall of the docking seat 10.

When the liquid medicine transferring adapter 100 is not needed, the pore passage 14 can be blocked by the elastic ring 60, so that external gas or liquid is prevented from entering the air passage channel 25, and the service life of the inflatable air bag 30 is prolonged.

Illustratively, the elastic ring 60 is made of rubber.

In addition, the peripheral wall of the butt-joint seat 10 is provided with an annular groove 15, and the pore passage 14 is communicated with the annular groove 15. When the elastic ring 60 is clamped in the annular groove 15, the elastic ring 60 seals off one end of the duct 14.

Further, the puncture needle 20 comprises a hollow needle body 27 and a partition body 28, the liquid outlet 24 and the needle point air outlet 22 are respectively arranged at two ends of the hollow needle body 27, and the air inlet 21 and the liquid inlet 23 are both arranged on the peripheral wall of the hollow needle body 27. The partition body 28 is provided inside the hollow needle body 27 and partitions the inner space of the hollow needle body 27 into the air passage channel 25 and the liquid passage channel 26. The puncture needle 20 having such a structure is simple in structure and convenient to manufacture.

Wherein, the hollow needle body 27 is hollow cylinder, and the separating body 28 is Z-shaped structure. The gas inlet 21 is far from the needle point gas outlet 22 than the liquid inlet 23.

In other embodiments, the puncture needle 20 may have other structures, for example, the puncture needle 20 has a solid cylindrical shape as a whole, and two channels, namely, the air channel 25 and the fluid channel 26, are provided inside the puncture needle 20.

In this embodiment, the inflatable air bag 30 is disposed in the air passage 25, and the inflatable air bag 30 can move and inflate in the air passage 25. Illustratively, inflatable balloon 30 includes a balloon 31 and a slip ring 32, where slip ring 32 is connected to the opening of balloon 31, and where slip ring 32 forms a sliding sealing fit with the inner wall of airway channel 25 (the inner wall of hollow needle 27). This structure allows the inflatable bladder 30 to have a good sliding performance in the air passage 25, and also allows the inflatable bladder 30 to have a good sealing performance with the inner wall of the air passage 25.

Wherein the size of the slip ring 32 does not change according to the change of the inflatable air bag 30. The axial cross-section of the slip ring 32 may be circular, rectangular, etc. Of course, in order to improve the sealing performance between the slip ring 32 and the inner wall of the gas passage 25, a sealing ring may be provided between the slip ring 32 and the inner wall of the gas passage 25.

The slip ring 32 may be of various materials, such as copper, aluminum, hard plastic, etc. The bladder 31 may be made of various materials as long as it can be expanded by gas, such as mylar, polyester, polyethylene, polypropylene, silicone rubber, polyurethane, etc.

Further, a first limit part 251 is arranged in the air passage 25, and the first limit part 251 is used for limiting the slip ring 32 to be separated from the puncture needle 20 from the needle point air outlet 22.

The first limiting part 251 has the function of limiting the movement of the sliding ring 32, and in the process of extracting the liquid medicine in the penicillin bottle 200, after the sliding ring 32 is contacted with the first limiting part 251, the sliding ring 32 does not move any more, so that the sliding ring 32 is prevented from being separated from the puncture needle 20 from the needle point air outlet 22.

Illustratively, the first limit portion 251 is close to the needle tip of the puncture needle 20, and after the sliding ring 32 contacts with the first limit portion 251, the capsule 31 can enter the vial 200 from the needle tip as much as possible and expand in the vial 200. The first position-limiting part 251 is an annular structure arranged on the inner wall of the hollow needle body 27 of the puncture needle 20, the inner wall of the first position-limiting part 251 is a conical structure, and the large end of the inner wall of the first position-limiting part 251 is closer to the needle point of the puncture needle 20 than the small end thereof. In other embodiments, the first position-limiting part 251 may have other structures, for example, the first position-limiting part 251 is a cylindrical protrusion protruding from the inner wall of the hollow needle 27, and the protrusion is arranged along the radial direction of the hollow needle 27.

The air passage 25 is further provided with a second limiting portion 252 spaced apart from the first limiting portion 251, and the slip ring 32 can slide between the first limiting portion 251 and the second limiting portion 252, that is, the slip ring 32 is limited between the first limiting portion 251 and the second limiting portion 252. In the process of injecting the reagent into the west forest bottle 200, after the slip ring 32 contacts the second limit portion 252, the slip ring 32 does not move any more, but the air bag can continue to expand.

Illustratively, the second limit stop 252 is an annular structure disposed on the inner wall of the hollow needle body 27 of the puncture needle 20. In other embodiments, the second position-limiting portion 252 may have other structures, for example, the second position-limiting portion 252 is a cylindrical protrusion protruding from the inner wall of the hollow needle body 27, and the protrusion is arranged along the radial direction of the hollow needle body 27.

Further, the inflatable balloon 30 also includes an auxiliary deflating structure in which the auxiliary bladder 31 is retracted into the air passage 25. The auxiliary constriction structure functions to facilitate the constriction of the balloon 31 to the air passage 25.

In this embodiment, the auxiliary contraction structure includes a plurality of elastic pieces 33 circumferentially arranged at intervals on the sliding ring 32, and all the elastic pieces 33 are wrapped on the outer side of the capsule 31.

As shown in fig. 2, during the process of extracting the liquid medicine from the vial 200, the capsule 31 will expand in the vial 200, and the expanded capsule 31 elastically deforms and expands the elastic sheets 33. After the liquid medicine in the penicillin bottle 200 is pumped out, when the puncture needle 20 is pulled out of the penicillin bottle 200, and the rubber stopper at the bottle mouth of the penicillin bottle 200 contacts with each elastic sheet 33, since each elastic sheet 33 is in an open state, the outside air enters the penicillin bottle 200 from the gap between the elastic sheet 33 and the elastic sheet 33, the capsule body 31 is gradually shrunk, and the capsule body 31 is gradually shrunk into the air passage 25 by the elastic sheet 33 under the action of the self elasticity and the extrusion force of the rubber stopper of the penicillin bottle 200 in the process of pulling out the puncture needle 20.

The number of the resilient pieces 33 connected with the slip ring 32 may be two, three, four, etc. Illustratively, the number of the spring pieces 33 is four, and every two adjacent spring pieces 33 are spaced by 90 degrees in the circumferential direction of the slip ring 32.

Optionally, with continued reference to fig. 1, the elastic sheet 33 includes a first bent portion 331 and a second bent portion 332 arranged at an obtuse angle. One end of the first bent portion 331 is connected to the second bent portion 332, and the other end of the first bent portion 331 is connected to the slip ring 32.

Since the first bending portion 331 and the second bending portion 332 of the resilient tab 33 are disposed at an obtuse angle, the resilient tab 33 has a larger elastic force after being unfolded due to the expansion of the balloon 31, so that the balloon 31 is easily retracted into the air passage 25. In addition, this structure makes the free end of each second bending part 332 on a smaller circumference, i.e. the free end of the whole auxiliary contraction structure forms a pointed shape, so that the capsule 31 can more easily pass over the first limiting part 251 to protrude into the vial 200. In addition, since the inner wall of the first position-limiting portion 251 is conical, each elastic sheet 33 can easily pass over the first position-limiting portion 251 when the capsule 31 retracts into the air passage 25.

As can be seen from the above, in the present embodiment, the elastic sheet 33 is a bent structure. In other embodiments, the elastic sheet 33 may have other structures, for example, the elastic sheet 33 is a straight strip-shaped sheet structure connected to the slip ring 32.

It should be noted that in other embodiments, the auxiliary contracting structure may be another structure, for example, as shown in fig. 4, the auxiliary contracting structure includes a plurality of elastic reinforcing ribs 34 circumferentially spaced apart from the balloon 31, and the rigidity of the elastic reinforcing ribs 34 is greater than that of the balloon 31. That is, the elastic reinforcing rib 34 has a larger elastic force after being elastically deformed, and after the capsule body 31 is expanded in the vial 200, the capsule body 31 can be more easily retracted into the air passage channel 25 under the action of the elastic reinforcing rib 34.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A medical fluid transfer adapter, comprising:

the butt joint seat is used for butt joint with a penicillin bottle;

the puncture needle is connected to the butt joint seat and provided with an air inlet, a needle point air outlet, a liquid inlet and a liquid outlet, the air inlet is communicated with the needle point air outlet to form an air passage, and the liquid inlet is communicated with the liquid outlet to form a liquid passage; when the puncture needle is inserted into the penicillin bottle, the needle point air outlet and the liquid inlet are both positioned in the penicillin bottle, and the air inlet and the liquid outlet are both positioned outside the penicillin bottle; and

and the expansion air bag is positioned in the air channel, and the expansion air bag is in sliding sealing fit with the inner wall of the air channel.

2. Medical fluid transfer adapter according to claim 1, wherein the inflatable balloon comprises a balloon and a slip ring connected to an opening of the balloon;

3. The medical liquid transfer adapter according to claim 2, wherein a first stopper portion for restricting the slip ring from coming off the puncture needle from the needle tip air outlet is provided in the air passage.

4. The medical liquid transfer adapter according to claim 3, wherein a second stopper part having a distance from the first stopper part is provided in the air passage;

5. The medical fluid transfer adapter according to claim 3, wherein said inflatable balloon further comprises a secondary constriction that assists retraction of said balloon into said air passage channel.

6. The medical fluid transfer adapter according to claim 5, wherein the auxiliary constriction structure comprises a plurality of resilient tabs circumferentially spaced apart from the slip ring;

7. The medical fluid transfer adapter according to claim 6, wherein the resilient piece includes a first bent portion and a second bent portion arranged at an obtuse angle;

8. The medical fluid transfer adapter according to claim 5, wherein the secondary constriction structure comprises a plurality of resilient ribs circumferentially spaced apart from the balloon;

9. The medical liquid transfer adapter according to claim 1, wherein the docking base is provided with a hole passage penetrating a peripheral wall thereof, the hole passage communicating with the air inlet;

10. The medical fluid transfer adapter according to claim 1, further comprising a rubber stopper and a plugging cap;