CN212282384U - Silica gel elastomer type positive pressure needle-free infusion joint - Google Patents

Abstract

The utility model discloses a be applied to the needleless infusion of silica gel elastomer formula malleation joint of clinical infusion field, its structure is including the overcoat that is provided with the inner chamber passageway, a pedestal, piston and elastic construction, elastic construction is the silica gel elastomer, the both ends of silica gel elastomer are for strengthening the ring spare, the middle part forms the elasticity portion that the surface is the ripple shape, the surface of the enhancement ring spare that pastes the locating spacing bulge loop forms and drives the tip seal bulge loop of content portion interference fit, another strengthens the protruding seal ring of establishing for installing in base tip and port overcoat of ring spare, the protruding a plurality of seal ring spare that are equipped with of internal surface of silica gel elastomer. The device has guaranteed sealing characteristic and the reciprocal drive equilibrium of inside piston when realizing that the structure is simplified, has promoted application quality and result of use, and easily realizes reducing of whole volume, and the promotion of the device practicality of being convenient for has avoided the application of metal parts simultaneously, has prevented the influence to inspection operations such as nuclear magnetic resonance, has guaranteed medical effect.

Description

Silica gel elastomer type positive pressure needle-free infusion joint

Technical Field

The utility model relates to a silica gel elastomer type positive pressure needleless infusion joint applied in the field of clinical infusion.

Background

At present, in the global medical infusion field, needle-free puncture is the mainstream trend, and the positive pressure needle-free infusion connector can be clinically used for being connected with a vein detaining needle and an infusion apparatus to realize needle-free puncture or being connected with medical apparatuses such as picc and an infusion port for long-term tumor chemotherapy and infusion. In general, in an apparatus for intravenous infusion into a blood vessel through a small catheter, such as an indwelling needle, a picc, and a central venous catheter, a nurse performs a catheter closure operation of a catheter with a heparin sodium catheter closure solution after completion of the infusion, and prevents blood from flowing back to the indwelling needle, the picc, and the lumen at the distal end of the central venous catheter and coagulating to form a thrombus after the completion of the infusion. When the operation or the like requires the infusion operation again, the tip of the tube is clogged and the infusion cannot be performed any more, and therefore, the replacement operation of the indwelling needle, the picc, and the central venous catheter is required. According to the operation process, on one hand, a nurse needs to seal the indwelling needle or the picc and the central venous catheter with heparin sodium in time after the transfusion is finished, the workload of tube sealing is large, and the working strength of the nurse is increased. On the other hand, since picc, central venous catheter and price are expensive, the cost of patients is increased, and the family burden and treatment cost are increased.

Although some positive pressure needleless infusion connectors are also available on the market. However, most of the positive-pressure needleless infusion connectors are large in size, so that patients are uncomfortable to carry and inconvenient to move. And the structure of the liquid medicine passage in the positive-pressure needle-free infusion connector is complex, so that a liquid dead angle exists in the inner cavity of the needle-free infusion connector, bacteria are easy to fix and grow, the grown bacteria enter the blood vessel of a patient along with the liquid medicine, the medical problem which can be estimated can be brought, and the treatment effect is influenced. In addition, the volume of the inner cavity of the positive-pressure needleless infusion joint is large, so that a large amount of liquid medicine is left after infusion or injection, and a large amount of clinical insulin and antitumor drugs are very expensive and have a large amount of liquid medicine left, so that the curative effect of the drugs is weakened, the curative effect is influenced, money is wasted, and the medical burden of a patient is further increased. There is still the needleless infusion joint of blunt needle structure in the market, because metal parts such as metal spring are inside its joint, on the one hand the metal parts rust easily and the oxidation blackens, produces harmful effects and fear in mind to the patient, on the other hand patient in case of using needleless infusion joint, just can not carry out nuclear magnetic resonance image inspection, has hindered the medical procedure.

Disclosure of Invention

The technical problem solved by the utility model is to provide a silica gel elastomer formula malleation needleless infusion joint of effectively promoting medical effect.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a silica gel elastomer formula malleation needleless infusion connects, includes overcoat, base, piston and the elastic construction that is provided with the inner chamber passageway, the one end coaxial coupling of base surrounds formation piston in overcoat and cooperation and holds the chamber, and liquid operation port has been seted up to the other end, piston coaxial coupling holds the intracavity and realizes that one end can be reciprocal wears to establish and get into the inner chamber passageway, and its another tip towards annotating liquid operation port sets up to the piston top, the liquid passage that is linked together with the inner chamber passageway is seted up to the piston coaxial coupling and has seted up in the side that is close to the piston top annotates the liquid mouth, the piston is equipped with spacing bulge loop in the one side protruding of annotating liquid mouth, the injection operation portion of annotating the liquid mouth is being provided to one side of spacing bulge loop, and the opposite side is elastic drive portion, the one end endotheca of base is connected in the overcoat, the base set up with the A sealing ring is sleeved and connected between the injection port and the top of the piston of the injection operation part to realize the sealing interference fit with the injection connecting part, a limiting table surface corresponding to the limiting convex ring is formed at the connecting part of the injection connecting part and the driving content part, the end part of the injection connecting part is a liquid injection operation port, the driving content part, the limiting convex ring and the base are matched to form an installation cavity for installing the elastic structure, the elastic structure is a silica gel elastic body, the two ends of the silica gel elastic body are provided with reinforcing ring pieces, the middle part of the silica gel elastic body is provided with an elastic part with a corrugated outer surface, the outer surface of the reinforcing ring piece attached to the limiting convex ring is provided with an end sealing convex ring in interference fit with the driving inner part, the other reinforcing ring piece is convexly provided with a sealing gasket arranged between the end part of the base and the outer sleeve, the inner surface of the silica gel elastomer is coaxially and convexly provided with a plurality of sealing ring pieces towards the elastic driving part.

The device is in the application, and the elastic drive portion of piston is located to the silica gel elastomer cover, utilizes the structure to realize respectively then the sealed operation to the connection position of overcoat and bottom, carries out protruding the establishing of a plurality of sealing ring spare in its inner surface simultaneously, guarantees then to be connected sealed effect with the piston to make its integration realize good sealing characteristic. The device has realized the simplification of structure when guaranteeing the resilience ability and sealing performance, changes in the reduction that realizes whole volume, promotes device's practicality and operation application scope. The operation quality is ensured. Furthermore, the silica gel elastomer is of a cylindrical structure with the same inner diameter, the outer diameter of the elastic driving part close to the limiting convex ring is increased to realize interference sealing connection with the reinforcing ring, and the sealing ring is a bottom sealing ring close to the inner surface of the reinforcing ring of the base.

Further, the liquid channel is a slender linear cylindrical channel, the liquid injection port is two symmetrically-arranged lateral square holes,

further, the base is of a multi-face prism structure, and a plurality of reinforcing ribs are arranged on the outer surface of the driving content portion along the circumferential direction parallel to the axis direction.

The utility model has the advantages that:

1. the device is structurally arranged, the integrated design of a conventional spring and a sealing ring is realized by using a silica gel elastomer, the super-strong resilience performance and the excellent self-sealing performance are provided by using the material characteristics of the device, the sealing characteristic and the reciprocating driving balance of an internal piston are ensured while internal parts are reduced, the application quality and the use effect are improved, the reduction of the whole volume is easy to realize on the basis of simplifying the product structure, the improvement of the practicability of the device is convenient, the application of metal parts is avoided, the influence on the subsequent nuclear magnetic resonance lamp inspection operation is avoided, and the medical effect is ensured;

2. the structural arrangement of the silica gel elastomer and the elastic driving part ensures the strength of a piston supporting structure with the increased outer diameter, ensures the application stability, increases the contact area with the silica gel elastomer, ensures the connection quality and forms the sealing effect of the end part, and sets the sealing ring part as the other end part of the silica gel elastomer, thereby on one hand, ensuring the sealing effect between the silica gel elastomer and the two ends of the piston and reducing the application of the sealing effect in the deformation process, on the other hand, the structural strength can be increased by using the reinforcing ring part, the stability of the side relative acting force is ensured, and the sealing and positioning effect is ensured;

3. due to the structural arrangement of the slender linear cylindrical channel, dead angles of an internal structure are avoided, liquid is prevented from being accumulated in the slender linear cylindrical channel, the application rate of the liquid medicine is ensured, the washing quality of medical staff for the inner cavity of the joint is facilitated, the bacteria fixed value is reduced, the sanitary safety of medical equipment is ensured, in addition, the reduction of the internal volume is easily realized, the residual quantity of the liquid medicine is further reduced, the medical effect is ensured, and the reasonable configuration of the cost is easier to realize;

4. the cooperation setting of base surface and overcoat strengthening rib has promoted the connection structure surface friction of device, provides the guarantee for what medical personnel can be quick accurate is connected infusion utensil and malleation needleless infusion joint.

Drawings

FIG. 1 is a schematic view of the connection structure of the needleless infusion connector of the present invention;

FIG. 2 is a schematic view of the connection structure of the needleless infusion connector and the injection device interface of the present invention;

FIG. 3 is a front view of the outer cover structure of the present invention;

fig. 4 is a front view of the piston structure of the present invention;

FIG. 5 is a front view of the structure of the silicone elastomer of the present invention;

FIG. 6 is a front view of the base structure of the present invention;

FIG. 7 is a front view of the connection structure of the needleless infusion connector of the present invention;

labeled as: 1. a jacket; 11. an injection connection; 12. a drive content section; 121. reinforcing ribs; 2. a piston; 21. an injection operation section; 211. a piston top; 212. a liquid injection port; 213. a seal ring; 214. sealing the positioning groove; 22. a limit convex ring; 23. an elastic driving part; 24. a liquid channel; 3. a silicone elastomer; 31. a reinforcement ring; 311. an end sealing convex ring; 32. an elastic portion; 33. a bottom seal ring; 4. a base; 41. an inner cavity channel; 5. an injection instrument interface;

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

The structure of the needleless infusion joint is shown in figure 1 and comprises a jacket 1, a base 4 provided with a cavity channel 41, a piston 2 and an elastic structure. The surface of the base 4 is arranged to be an octahedral prism structure as shown in fig. 6, and the friction force of the structure is further improved by the polyhedral prism structure. And mostly be swivelling joint in the device application, the effect of applying of operating force can be promoted to the edge that forms between the prismatic adjacent side of multiaspect, guarantees the rotation quality, also provides the guarantee for medical safety simultaneously. One end of the base 4 is connected with an external medical accessory, and the other end is used as a joint accessory connecting end. The inside of this joint accessory link forms mounting groove to guarantee to connect 1 tip endotheca of overcoat, guarantee connection quality. The structure of the piston 2 comprises an injection operation part 21, a limiting convex ring 22 and an elastic driving part 23 which are sequentially arranged along the axis as shown in fig. 4, wherein two side holes communicated with an internal liquid channel 24 are symmetrically formed in the side surface of the injection operation part 21 to serve as liquid injection ports, the liquid channel 24 can be formed into a slender linear cylindrical channel which is opened towards the base along the axis, and then the slender linear cylindrical channel is communicated with the inner cavity channel 41, so that the liquid is conveyed. The reduction of inside volume can be realized on the one hand to setting up of slender type straight line passageway, reduces the liquid retention volume, promotes medical treatment effect of using medicine, and on the other hand usable its inner wall structure realizes promoting the water conservancy diversion effect, reduces the stock solution dead angle of internal flow way, reduces and has reduced the field planting possibility of bacterium, and convenient medical personnel adjust the washing of the inside lumen of crimping connector, the realization of the medical health standard of being convenient for. The outer diameter of the end of the elastic driving part 23, which is opened with the liquid passage 24, is set to match the inner diameter of the inner wall passage 41, thereby realizing the inner sleeve reciprocating movement along the axis thereof under the application of external acting force. The elastic structure shown in fig. 5 is sleeved on the elastic driving portion 23, and two ends of the elastic driving portion are abutted against the end surfaces of the limiting convex ring 22 and the base 4. The elastic structure is a silica gel elastic body 3, and medical silica gel materials are used for producing the elastic structure, so that the elastic structure has the material characteristics of good medical biocompatibility and super-strong resilience, and the design formats of a mechanical spring and a sealing ring which are usually adopted by the original positive-pressure needle-free infusion connector can be integrated into one silica gel elastic body, so that the simplification of the structure is realized. The middle part of the silica gel elastomer 2 is provided with a cylindrical structure with consistent inner diameter, and a piston sliding channel capable of moving automatically is formed. In order to ensure the connection sealing effect, the silicone elastomer 3 is convexly provided with a bottom sealing ring 33 on the inner surface of the reinforcing ring member 31 close to the base 4, so as to realize a sealing interference fit with the end part of the elastic driving part 23. Meanwhile, the other part of the elastic driving part 23 close to the limit convex ring 22 is subjected to external diameter increase, so that interference sealing connection with the reinforcing ring piece 31 at the corresponding position is realized by using the structure of the elastic driving part. The expansion of this tip has promoted sealed effect and structure self intensity on the one hand, and on the other hand also avoids the influence to the endotheca operation of cavity passageway 41, has guaranteed connection quality. The axial length of the outer diameter expansion of the elastic driving part 23 can be set to be equal to the width of the reinforcement ring member 31

The adaptation, and then promote the connection effort, should avoid simultaneously the influence to another tip internal sleeve connection. According to the method, the elastic driving part 23 is used for achieving sealing arrangement of the two ends of the elastic driving part 23, so that the connection sealing effect is guaranteed, a certain buffering gap is formed between the elastic part 32 with the corrugated outer surface in the middle and the elastic driving part 23, so that an enough strain space is guaranteed, the deformation quality is guaranteed, meanwhile, dislocation of the connection relative position caused by space limitation is avoided, and the support application effect is guaranteed. As shown in figure 3, six reinforcing ribs 121 are uniformly and convexly arranged on the outer surface of the jacket 4 along the circumferential direction parallel to the axial direction, so that the surface friction is improved, and the overall application effect of the needleless infusion joint is improved by matching with the jacket 1. The outer sleeve 1 is provided along the axis with an injection connecting portion 11 adapted to the outer diameter of the injection operating portion 21 and a driving inner portion 12 adapted to the outer diameter of the stopper collar 22 according to the relative configuration of the piston 2. The injection operation unit 21 has a seal positioning groove 214 coaxially formed on the outer surface thereof between the liquid inlet 212 and the piston top 211, and is connected to the packing 213 in a position-limited manner. The injection connecting part 11 and the sealing ring 213 are in interference fit to realize the connection sealing performance with the injection operating part 21, and one side end face of the piston top 211 is set to be an inclined plane structure, so that the end part of the injection connecting part 11 is provided with a liquid injection operating port. Due to the change of the coaxial opening inner diameter, a limiting table surface corresponding to the limiting convex ring 22 is formed at the connecting part of the injection connecting part 11 and the driving content part 12, and the relative position of the limiting convex ring 22 is further limited. At this time, the silicone elastomer 3 externally sleeved on the elastic driving portion 23 is placed in a mounting cavity formed by the driving content portion 12, the limit convex ring 22 and the base 4. An end sealing convex ring 311 is convexly arranged on the outer surface of the reinforcing ring piece 31 close to the limiting convex ring 22, so that the circumferential sealing effect with the driving content part 12 is realized. At this time, the content part is driven

The other end of 12 is internally sleeved on the base 4. The outer diameter of the reinforcing ring member 31 abutting against the end face of the base 4 is set to match the inner diameter of the base 4, and then the end face of the inner sleeve of the outer sleeve 1 abuts against the end face of the reinforcing ring member 31, and further fastening connection is realized. At this time, the outer ring of the reinforcing ring member 31 serves as a sealing gasket for improving the sealing effect of the connection between the jacket 1 and the base 4, and the connection and positioning of the structures on the two sides of the outer ring are utilized to realize the positioning operation of the end of the silica gel elastomer 3, so that the connection and application quality is ensured, and the driving and application effect is further ensured.

During the application process, the outer sleeve 1, the piston 2, the silicone elastomer 3 and the base 4 are connected according to the above and fig. 1

Then, an external structure is formed as shown in fig. 7, in which the piston end 211 is inserted through the injection operation port of the outer cap 1. The silicone elastomer 3, the piston 2 and the sealing ring 213 form a freely movable assembly, and the sealing ring 213 at the injection operation part 21 on the top of the piston 2 is in a sealing state with the injection connection part 11 of the outer sleeve 1. The end sealing convex ring 311 of the silicone elastomer 3 and the sealing washer are in a sealing state with the outer sleeve 1. The piston 2 and the silica gel elastomer 3 are assembled together, and the silica gel elastomer 3 and the piston 2 form a sealed whole through interference fit between the silica gel elastomer 3 and the piston 2.

In use, as shown in fig. 4, the priming instrument interface 5 (such as the connector of an infusion set or the connector of an injector) is screwed into the positive pressure needleless infusion connector, i.e. enters from the priming operation port of the injection connection part 11 and abuts against the piston top part 211 of the piston 2. With the deepening of the screwing depth, the piston 2 of the positive-pressure needle-free infusion joint moves downwards, and the silicone elastomer 3 is extruded under the action of the limit convex ring 22 and axially moves towards the base 4. When the sealing ring 213 is located at the injection connecting part 11, the chemical liquid in the injection device is located in the injection connecting part 11 by the sealing function of the sealing ring 213. As the downward depth is further screwed in, the packing 213 enters the drive content portion 12, and as the inner diameter of the outer jacket 1 increases, the sealing function of the packing 213 disappears. The liquid of the transfusion apparatus or the injector enters the positive-pressure needle-free transfusion joint from the top slope of the positive-pressure needle-free transfusion joint

The inner cavity of the outer sleeve 1 and enters the liquid channel from the liquid injection port 212 at the piston 2. Because piston 2 and silica gel elastomer 3 constitute an organic whole, carry out sealing connection with the internal surface of silica gel elastomer 3 and overcoat 1 at the sealed bulge loop 311 of tip of silica gel elastomer 3, then make liquid can't flow along the lateral wall of silica gel elastomer 3 and overcoat 1 to guarantee that liquid can only follow the quad slit entering of the both sides of piston 2 top and live in the liquid passageway 24, further flow along this direction. Because the bottom sealing ring 33 is designed between the piston 2 and the silica gel elastomer 3, and the reinforcing ring piece 31 is used under the silica gel elastomer 3 to seal the gap between the outer sleeve 1 and the base 4, the liquid can only enter an indwelling needle, a picc or other instruments along the inner cavity channel 41 of the positive pressure needleless infusion joint and finally enter a blood vessel. In order to ensure the operation stability of the device, the inner surface of the inner cavity channel 41 is provided with a limit ring, so that the end part of the piston 1 is limited in displacement, and the operation quality and the medical safety are ensured.

After the use is finished, after the medical staff extracts the interface 5 of the injection device, the silica gel elastic body 3 reversely drives the limit convex ring 22 under the action of self elasticity, and then the piston and the components of the silica gel elastic body realize synchronous movement. When the sealing ring 213 returns to the position-limiting surface, the sealing ring 213, the piston 2, the end sealing convex ring 311 and the outer sleeve 1 cooperate to form a closed space. The remaining liquid during the transfusion remains in the closed space, and only two liquid injection ports 212 in the closed space are connected to the external environment, i.e., the liquid passage 24. At this time, the piston 2 and the packing 213 continue to move upward under the action of the elastic force of the silicone elastomer 3 itself, and the liquid retained inside can only enter the liquid passage 24 along the liquid inlet 212 and enter from the inner passage 41

Into an indwelling needle, picc, or other infusion device. Due to the structural arrangement of the liquid channel 24, the volume of the internal channel thereof is reduced. The measured volume of the inner cavity of the positive pressure needleless infusion joint can reach 0.07ml while ensuring the medical requirement, and the prior common positive pressure needleless infusion joint is 0.19ml to 0.40 ml. Therefore, the residual volume of the inner cavity of the utility model is very small, the backflow of the liquid medicine in the blood vessel is effectively prevented, and simultaneously, the acting force positively flows to the human body along the infusion direction, thereby providing a positive pressure acting force and ensuring the operation effect. The needleless positive pressure infusion joint is connected with an indwelling needle, a picc, an infusion port and a central venous catheter, and after infusion is finished, a nurse only needs to pull out an infusion apparatus. The needle-free positive pressure infusion joint can automatically generate a certain volume of positive pressure to push the liquid in the indwelling needle, the picc, the infusion port and the central venous catheter to continue to advance. Therefore, the catheter is effectively prevented from being blocked by blood backflow after the transfusion is finished, the tube sealing by heparin sodium is omitted, the labor intensity of nurse workers is reduced, and the medical cost is reduced.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (4)

1. The utility model provides a silica gel elastomer formula malleation needleless infusion connects, includes overcoat (1), base (4), piston (2) and the elastic construction that is provided with inner chamber passageway (41), the one end coaxial coupling of overcoat (1) surrounds formation piston and holds the chamber in base (4) and cooperation, and liquid operation port has been seted up to the other end, piston (2) coaxial coupling holds the intracavity and realizes that one end can reciprocate to wear to establish and get into inner chamber passageway (41), and its another tip towards annotating liquid operation port sets up to piston top (211), piston (2) coaxial seting up liquid passageway (24) that are linked together with inner chamber passageway (41) and in the side of being close to piston top (211) seted up notes liquid mouth (212), its characterized in that, piston (2) are equipped with spacing bulge loop (22) in that one side that liquid mouth (212) was kept away from piston top (211) is annotated to liquid mouth (2, one side of the limiting convex ring (22) is an injection operation part (21) provided with a liquid injection port (212), the other side of the limiting convex ring is an elastic driving part (23), one end of the base (4) is internally sleeved in the outer sleeve (1), the base (4) is provided with an injection connecting part (11) matched with the injection operation part (21) and a driving containing part (12) matched with the outer diameter of the limiting convex ring (22), the injection operation part (21) is sleeved and connected with a sealing ring (213) between the liquid injection port (212) and the piston top (211) to realize the sealing interference fit with the injection connecting part (11), a limiting table top corresponding to the limiting convex ring (22) is formed at the joint of the injection connecting part (11) and the driving containing part (12), the end part of the injection connecting part (11) is an liquid injection operation port, the driving containing part (12), the limiting convex ring (22) and the base (4) are matched to form an installation cavity for installing an elastic structure, the elastic structure is a silica gel elastic body (3), the two ends of the silica gel elastic body (3) are provided with reinforcing ring pieces (31), the middle part of the silica gel elastic body forms an elastic part (32) with a corrugated outer surface, the outer surface of each reinforcing ring piece (31) attached to the limiting convex ring (22) forms an end sealing convex ring (311) in interference fit with the driving content part (12), the other reinforcing ring piece (31) is convexly arranged as a sealing gasket arranged between the end part of the base (4) and the outer sleeve (1), and the inner surface of the silica gel elastic body (3) is coaxially and convexly provided with a plurality of sealing ring pieces towards the elastic driving part (23).

2. The silicone elastomer type positive-pressure needle-free infusion joint as claimed in claim 1, wherein the silicone elastomer (3) is a cylindrical structure with a uniform inner diameter, the outer diameter of the elastic driving part (23) close to the limit convex ring (22) is increased to realize interference sealing connection with the reinforcing ring piece (31), and the sealing ring piece is a bottom sealing ring (33) close to the inner surface of the reinforcing ring piece (31) of the base (4).

3. The silicone elastomer type positive-pressure needle-free infusion joint as claimed in claim 1, wherein the liquid channel (24) is an elongated straight cylindrical channel, and the liquid injection port (212) is two symmetrically-opened lateral holes.

4. The silicone elastomer type positive-pressure needle-free infusion joint as claimed in claim 1, wherein the base (4) is provided with a multi-surface prism structure, and a plurality of reinforcing ribs (121) are circumferentially arranged on the outer surface of the driving content part (12) along a direction parallel to the axis.

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