CN112915355A - Pre-filled catheter flusher - Google Patents

Abstract

The invention provides a pre-filled catheter flusher, which comprises: the device comprises a deformable liquid storage container 1 at least partially, wherein the liquid storage container 1 is provided with an injection port 10, one end of the injection port 10 of the liquid storage container 1 is provided with a pressure applying device 2 capable of closing the injection port 10 from the outside of the liquid storage container 1, and when the pressure of flushing liquid reaches or exceeds a preset value through deformation of the liquid storage container 1, the flushing liquid overcomes the resistance applied to the injection port 10 by the pressure applying device 2 to realize flushing. The pre-filled catheter flusher can prevent flushing liquid from flowing back to the liquid storage cavity 11, and the pressure applying device 2 is not in contact with the flushing liquid, so that the material requirement on the pre-filled catheter flusher is low, the manufacturing cost of a product is reduced, the production process of the product is simplified, and the pre-filled catheter flusher is safer and more reliable to use.

Description

Pre-filled catheter flusher

Technical Field

The invention relates to the technical field of medical instruments, in particular to a prefilled catheter flusher for flushing a catheter.

Background

Intravenous catheters are widely used in clinics, such as intravenous indwelling needles, PICCs, and the like. The tube sealing is one of the important links for the successful application of the vein catheterization, and the tube sealing liquid is the key for keeping the pipeline smooth. The pre-filled catheter flusher can be used as a novel catheter sealing liquid and can replace the traditional catheter sealing liquids such as normal saline, heparin diluent and the like. And the pre-filled catheter flusher has the stock solution container to be rebounded by the compression part in current patent basis, leads to the flush fluid to flow back to the stock solution inner chamber, and then leads to blood to flow back into the catheter intracavity, appears the problem of catheter blockage. In order to solve the above problems, the pre-filled catheter flusher in the prior art is provided with a one-way valve at one end of the injection port of the liquid storage container to prevent the flushing liquid from flowing back to the inner cavity of the liquid storage container. Because above-mentioned check valve sets up in the stock solution inner chamber, with flush fluid direct contact, it is higher to the check valve material requirement, not only increase the manufacturing cost of product, bring great economic burden moreover for the patient, still have the potential safety hazard problem.

Therefore, there is a need for a pre-filled catheter flusher that is simple in structure, easy to operate, low in manufacturing cost, and safe and reliable in use.

Disclosure of Invention

The invention provides a pre-filled catheter flusher which is simple in structure, convenient to operate, low in manufacturing cost, safe and reliable to use.

The invention provides a prefilled catheter flusher, comprising: the flushing device comprises a deformable liquid storage container, an injection port is formed in the liquid storage container, a pressure applying device capable of sealing the injection port from the outside of the liquid storage container is arranged at one end of the injection port of the liquid storage container, and when the pressure of flushing liquid reaches or is larger than a preset value due to deformation of the liquid storage container, the flushing liquid overcomes resistance applied to the injection port by the pressure applying device to achieve flushing.

Preferably, the injection port is fixed with a connection joint in a sealing manner, the connection joint is used for being connected to a connection joint of a flushed pipeline, one end of the connection joint is provided with a liquid inlet, the other end of the connection joint is provided with a liquid outlet, the side wall of the connection joint is provided with a pressure applying port, the liquid inlet and the liquid outlet are communicated with each other, and the pressure applying device penetrates through the pressure applying port to act on the inner cavity wall of the connection joint, so that the communication between the liquid inlet and the liquid outlet is blocked, and the injection port is closed.

Preferably, the stock solution container cover in the container wall of the mouth of exerting pressure inwards caves in and forms the hemisphere sunken perhaps the mouth of exerting pressure is provided with the seal membrane that inwards caves in and form the hemisphere sunken, the device outer wall of exerting pressure outwards extends and forms the hemisphere arch, the hemisphere sunken with the hemisphere is protruding to be conformed to mutually, and the hemisphere arch passes behind the mouth of exerting pressure compress tightly in attach fitting inner chamber wall through the hemisphere sunken.

Preferably, the injection port is fixed with a connecting joint in a sealing manner, the connecting joint is used for being connected to a connecting joint of a pipeline to be flushed, and the pressurizing device acts on the outer wall of the container of the liquid storage container to enable the inner wall of the container of the liquid storage container to be attached to each other to close the injection port.

Preferably, the pressure applying device comprises two pressure applying components, one end of each of the two pressure applying components is fixed on the connecting joint, and the other end of each of the two pressure applying components acts on two opposite sides of the outer wall of the container of the liquid storage container, so that the inner walls of the container of the liquid storage container are mutually attached to seal the injection port.

Preferably, still include the sealing member, the sealing member seal in the injection port, the sealing member is one end closed, other end open-ended lid column structure, and the open end cover of sealing member is located attach fitting's outer wall, the sealing member blind end is provided with the part of easily breaking down, pressure device includes two biasing members, and two biasing members one end form or are fixed in the relative both sides of the outer wall of sealing member open end, and the other end acts on the container outer wall of stock solution container makes the container inner wall of stock solution container laminate each other and seal the injection port.

Preferably, the pressing device is an elastic clamp, and a clamping part of the elastic clamp is clamped on the outer wall of the container of the liquid storage container, so that the inner wall of the container of the liquid storage container is mutually attached to seal the injection port.

Preferably, the injection port is fixed with a connecting joint in a sealing manner, the connecting joint is used for being connected to a connecting joint of a flushed pipeline, the connecting joint is provided with a liquid outlet and a liquid inlet which are communicated with each other, the liquid inlet is arranged on a side wall of the connecting joint, the liquid outlet is communicated with the connecting joint of the flushed pipeline, the liquid inlet is communicated with the liquid storage container, and the pressurizing device acts on the liquid inlet to close the injection port.

Preferably, the pressure applying device acts on the liquid inlet by using a magnetic attraction manner to close the injection port; or, the pressure applying device acts on the liquid inlet by using a mechanical structure to close the injection port; or the pressure applying device acts on the liquid inlet in a manner of elastic tension to close the injection port.

Preferably, the pressure applying device is of a pressure rod structure, one end of the pressure applying device is fixed to the connecting joint, and the other end of the pressure applying device is pressed on the liquid inlet.

Preferably, the injection device further comprises a sealing component which seals the injection port.

Preferably, the sealing component is a cover-shaped structure with one end closed and the other end open, the opening end of the sealing component is sleeved on the outer wall of the connecting joint, and the closed end of the sealing component is provided with an easy-to-break part.

Preferably, the pressure applying device is in a pressure rod structure, one end of the pressure applying device is formed or fixed on the outer wall of the opening end of the sealing part, and the other end of the pressure applying device is pressed on the liquid inlet.

Preferably, the sealing mode between the pressure device and the periphery of the liquid inlet is surface-to-surface pressure sealing; or the sealing mode between the pressure device and the periphery of the liquid inlet is annular bulge and surface pressure sealing; alternatively, the pressing means and the outer periphery of the liquid inlet are sealed by a sealing member.

Preferably, the pressing device is provided with a bending section and a clamping hook/clamping groove, the wall thickness of the bending section is smaller than that of the pressing device except the bending section, and the connecting joint is provided with a clamping groove/clamping hook which is matched with the clamping hook/clamping groove in a clamping manner; or the pressure device is hinged with the connecting joint and is provided with a clamping groove/a clamping hook, and the connecting joint is provided with a clamping hook/a clamping groove which is matched with the clamping groove/the clamping hook in a clamping way; or the pressure applying device is elastically hinged with the connecting joint.

Preferably, the pressing device is an elastic clip, and a clamping part of the elastic clip clamps the liquid inlet to close the injection port.

Advantageous effects

Firstly, the prefilled catheter flusher disclosed by the invention realizes flushing by enabling flushing liquid to overcome the resistance applied to an injection port by a pressure device through deformation of a liquid storage container, and after flushing is finished, the pressure device can prevent the flushing liquid from flowing back to an inner cavity of the liquid storage; in addition, the injection port is sealed by the pressure applying device through the outside of the liquid storage container, and the pressure applying device is not in contact with washing liquid, so that the requirement on the material of the pressure applying device is low, the manufacturing cost of the product is reduced, the production process of the product is simplified, and the use is safer and more reliable.

Secondly, the acting positions of the pressure applying device can be various, and the pressure applying device can act on the outer wall of the container at one end of the injection port of the liquid storage container to enable the wall of the container to be attached to seal the injection port, so that the structure is simple, the manufacturing cost is low, and the assembly process is simple; or the injection port is fixedly provided with a hard connecting joint in a sealing manner, the pressure applying device can act on the outer wall of the container at one end, close to the connecting joint, of the liquid storage container, the hard connecting joint is lined on the inner wall of the container of the liquid storage container between the injection port and the pressure applying device, and the container wall of the liquid storage container between the pressure applying device and the injection port is effectively prevented from being deformed, so that flushing liquid reflows, blood reflows into the catheter cavity, and the catheter is blocked; or a liquid inlet is arranged on the side wall of one end, close to the injection port, of the connecting joint, and the pressure applying device can act on the liquid inlet to close the injection port, so that the pressure applying device can apply resistance to act on the liquid inlet conveniently, and the deformation area of the liquid storage container between the pressure applying device and the injection port is reduced.

Thirdly, the pressure applying device has various forms, can act on the liquid inlet in a magnetic attraction way, and has simple structure and easy realization; or the pressure device can act on the liquid inlet in a mechanical structure mode, so that the manufacturing cost is low, the stability is good, the safety and the reliability are high, and the batch production is easy; or the pressing device can act on the liquid inlet in an elastic tightening mode, and the device is simple in structure, low in manufacturing cost and simple in assembly process.

Fourthly, the pressure applying device has various mechanical structure forms, can be in a pressure lever structure or two pressure applying components and is integrally formed with the connecting joint, and has the advantages of simple structure, simple assembly process and lower manufacturing cost. The pressing device can be in an open state before use, and in a closed state when in use, the pressing device acts on the liquid inlet; or, the pressing device can be formed with the connecting joint in a split mode, and the pressing device and the connecting joint are assembled and connected when the pressing device is used, so that the fatigue loss of a product is reduced, the service performance of the product is guaranteed, and the service life of the product is prolonged. The pressing device can be an elastic clamp, and when the pressing device is used, a clamping part of the elastic clamp is clamped on the outer wall of the container of the liquid storage container; or, when in use, the clamping part of the elastic clamp is clamped at the liquid inlet, so that the fatigue loss of the product is reduced, the service performance of the product is ensured, and the service life of the product is prolonged.

Fifthly, the sealing mode between the pressing device and the periphery of the liquid inlet is various, the sealing can be surface-to-surface pressing sealing, the sealing can be performed by the annular bulge and the surface pressing sealing or the sealing part, the sealing is tighter, and the liquid leakage is effectively prevented.

Sixthly, the injection port is sealed by a sealing component, and the sealing component prevents flushing liquid in the liquid storage cavity from leaking from the injection port. In addition, one end of the pressing device is formed or fixed on the sealing part, so that the product is easy to form, and the manufacturing cost of the product is reduced.

Drawings

FIG. 1: the pressure applying device of the pre-filled catheter flusher provided by the embodiment of the invention is a full sectional view of two pressure applying components;

FIG. 2: the pressure applying device of the prefilled catheter flusher of the first embodiment of the invention is a structural view of two pressure applying components;

FIG. 3: the pressure applying device of the pre-filled catheter flusher disclosed by the embodiment of the invention is in a full-sectional exploded view of a pressure lever structure;

FIG. 4: the pressure applying device of the pre-filled catheter flusher disclosed by the embodiment of the invention is in a full sectional view of a pressure lever structure;

FIG. 5: the flushing liquid of the pre-filled catheter flusher disclosed by the embodiment I of the invention overcomes the resistance of the pressure applying device to realize flushing of a local sectional view;

FIG. 6: the clamping groove of the pressure applying device of the pre-filled catheter flusher disclosed by the embodiment of the invention is clamped with the clamping hook of the sealing part to form a partial sectional view;

FIG. 7: the structural view of the opening state of the pressure applying device of the pre-filled catheter flusher in the first embodiment of the invention;

FIG. 8: the clamping hook of the pressure applying device of the pre-filled catheter flusher disclosed by the embodiment of the invention is clamped with the clamping groove of the sealing part to form a partial sectional view;

FIG. 9: two clamping hooks of a sealing component of the pre-filled catheter flusher disclosed by the embodiment of the invention are clamped with two clamping grooves of a pressure applying device to form a partial sectional view;

FIG. 10: the structure view of the clamping of the U-shaped clamping sleeve and the sealing part of the pressure applying device of the pre-filled catheter flusher in the first embodiment of the invention;

FIG. 11: the structure view of the sliding rail of the pressure applying device of the pre-filled catheter flusher of the first embodiment of the invention and the sliding groove of the sealing part are clamped in a sliding way;

FIG. 12: the partial structure view of the pressurizing device of the pre-filled catheter flusher of the first embodiment of the invention and the sealing component which are elastically hinged;

FIG. 13: the pressure applying device of the pre-filled catheter flusher disclosed by the embodiment of the invention is in a partial sectional view of a split type elastic clamp;

FIG. 14: the pressure applying device of the pre-filled catheter flusher disclosed by the embodiment of the invention is in a structural view of a split type elastic clamp;

FIG. 15: the pressure applying device of the pre-filled catheter flusher disclosed by the embodiment of the invention is in a partial sectional view of an integrated elastic clamp;

FIG. 16: the pressure applying device of the pre-filled catheter flusher of the second embodiment of the invention utilizes a structure view of closing an injection port in a magnetic manner;

FIG. 17: the pressure applying device of the prefilled catheter flusher of the third embodiment of the invention utilizes the elastic force tightening mode to act on the structural view outside the liquid storage container;

FIG. 18: the pressure applying device of the prefilled catheter flusher of the third embodiment of the invention utilizes the elastic force tightening mode to act on the structural view of the liquid inlet;

FIG. 19: the pressure applying device of the prefilled catheter flusher of the fourth embodiment of the invention passes through the pressure applying port to act on the structural view of the inner cavity wall of the connecting joint.

1. A reservoir; 10. an injection port; 11. a liquid storage inner cavity; 12. a container wall; 2. a pressure applying device; 20. a connecting portion; 201. bending the section; 202. an annular ferrule; 203, a U-shaped ferrule; 204. a slide rail; 205. a first support; 21. a pressing part; 211. a hemispherical protrusion; 22. a first connecting member; 221. a first pin shaft; 222. a first torsion spring; 23. a clamping member; 231. a clamping portion; 232. a grip portion; 233. a pin shaft support; 234. a bending section; 24. a second connecting member; 241. a second pin shaft; 242. a second torsion spring; 25. a pressing member; 3. connecting a joint; 30 a liquid conduit; 31. a liquid inlet; 32. a liquid outlet; 33. a pipe wall; 331. a limiting table; 34. a collar; 341. an internal thread; 35. a pressure applying port; 4. a hook is clamped; 5. a card slot; 6. a sealing member; 61. an open end; 62. a closed end; 63. a frangible portion; 64. a chute; 65. a second support; 7. an annular projection; 8. a sealing member; 9. an elastic member.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the claims.

The present invention provides a pre-filled catheter flusher, and a first embodiment of the pre-filled catheter flusher provided by the present invention is described below.

Referring to fig. 1 and 2, a prefilled catheter flusher comprises a reservoir 1 pre-filled with a flushing liquid therein, the reservoir 1 having a container wall 12, the container wall 12 being at least partially deformable, the deformable container wall 12 being made of a flexible medical grade plastic material. Preferably, the liquid storage container 1 is made of medical PP materials, is convenient to deform and has small resilience force. The container wall 12 encloses to close and forms a liquid storage cavity 11, the liquid storage cavity 11 is prefilled with flushing liquid, an injection port 10 is formed in the container wall 12, and the flushing liquid is injected through the injection port 10. One end of an injection port 10 of the liquid storage container 1 is provided with a pressure applying device 2, and the pressure applying device 2 acts on the outer wall of the container of the liquid storage container 1 to enable the inner wall of the container of the liquid storage container 1 to be mutually attached to seal the injection port 10. When the pressure of the flushing liquid reaches or exceeds a preset value through the deformation of the liquid storage container 1 in use, the flushing liquid overcomes the resistance applied to the injection port 10 by the pressure applying device 2 to realize flushing. The deformation of the liquid storage container 1 means that a certain external force is applied to the liquid storage container 1 to deform the liquid storage container, and specifically, the liquid storage container 1 can be deformed in a manner of extrusion, pressing and the like. The specific setting criteria of the predetermined value are as follows: the predetermined value is greater than the human venous pressure and cannot be set too great to increase the difficulty of flush injections. The preferred ranges for the predetermined values are: 1.5kPa-1MPa, and the specific value of the preset value is designed reasonably according to the parameters of the liquid storage container 1, such as material selection, structure and the like, and is not limited specifically.

With continued reference to fig. 1 and 2, in order to prevent the liquid storage container 1 between the pressure applying device 2 and the injection port 10 from deforming to cause backflow of a washing liquid and further cause backflow of blood into a catheter cavity, and a catheter blockage phenomenon occurs, the injection port 10 is fixed with a connecting joint 3 in a sealing manner, the pressure applying device 2 acts on the outer wall of the container at one end of the liquid storage container 1 close to the connecting joint 3, the connecting joint 3 is made of a hard medical plastic material through injection molding, and the connecting joint 3 made of a hard material lines the inner wall of the container of the liquid storage container 1 between the pressure applying device 2 and the injection port 10, so that the liquid storage container 1 between the pressure applying device 2 and the injection port 10 is prevented from deforming. The connecting joint 3 comprises a liquid inlet 31, a liquid outlet 32 and a pipeline wall 33, the pipeline wall 33 encloses a liquid pipeline 30, one end of the liquid pipeline 30, which is connected with the connecting joint of the pipeline to be washed, is the liquid outlet 32, and one end of the liquid pipeline, which extends into the liquid storage cavity 11, is the liquid inlet 31. Specifically, the flushed pipeline can be an indwelling needle, a PICC or other equipment needing flushing; the connection adapter 3 may be a luer adapter or other connection adapter, and its specific structure is designed to be specifically matched according to the flushing device connected with it. In order to facilitate the connection joint 3 to communicate with the connection joint of the pipeline to be flushed, the outer wall of the connection joint 3 extends along the axial direction thereof to the direction of the liquid outlet 32 to form a collar 34, and an internal thread 341 which is in threaded fit with the connection joint of the pipeline to be flushed is arranged in the collar 34. With continued reference to fig. 1, the pressure applying device 2 acts on the outer wall of the liquid storage container 1 by using a mechanical structure, so that the inner wall of the liquid storage container 1 fits each other to close the injection port 10. Specifically, pressure device 2 includes two pressure applying components 25, two pressure applying components 25 distribute in the both sides of attach fitting 3 outer wall, pressure applying device 2 have connect in attach fitting 3's connecting portion 20 to and have the centre gripping in the portion of exerting pressure 21 of the relative both sides of the container outer wall of stock solution container 1, the portion of exerting pressure 21 is splint form, wholly to the container outer wall of stock solution container 1 draws close and compresses tightly, seals firmly, and the product is realized easily. In order to facilitate the fixing of the pressing device 2 on the outer wall of the connecting joint 3, the outer wall of the connecting portion 20 extends outward to form an annular clamping sleeve 202, and the annular clamping sleeve 202 is clamped on the outer wall of the connecting joint 3. Optionally, the pressing portions 21 of the two pressing members 25 may also be configured such that one pressing member 25 is provided with a clamping groove, and the other pressing member is provided with a clamping protrusion, and the clamping is firmer by clamping the two pressing members 25 on the opposite sides of the outer wall of the container of the liquid storage container 1 through the concave-convex matching of the clamping groove and the clamping protrusion. In this embodiment, the pressure applying device 2 may also be selected from other mechanical structures as long as the pressure applying device 2 is ensured to press and fit the container wall 12 from the outer wall of the liquid storage container 1, thereby closing the injection port 10.

As shown in fig. 3 and 4, preferably, in order to reduce a deformation area of the liquid storage container 1 between the pressure applying device 2 and the injection port 10, the pressure applying device 2 applies resistance to a liquid inlet 31 of the connecting joint 3 near one end of the injection port 10, in order to facilitate the pressure applying device 2 applying resistance to act on the liquid inlet 31 of the connecting joint 3, the liquid inlet 31 is disposed on a side wall of the connecting joint 3, the pressure applying device 2 is in a pressure rod structure, and the pressure applying portion 21 is integrally pressed toward one end of the liquid inlet 31. In order to ensure the sealing performance between the pressing part 21 and the liquid inlet 31, the pressing part 21 and the outer periphery of the liquid inlet 31 are sealed in a surface-to-surface pressure manner.

As shown in fig. 3, 4 and 5, in order to prevent the liquid from leaking before use, the device further comprises a sealing member 6, wherein the sealing member 6 is sealed at the injection port 10, the sealing member 6 is in a cap-shaped structure, one end of the sealing member 6 is provided with a closed end 62, the other end of the sealing member 6 is provided with an open end 61, the closed end 62 of the sealing member 6 is provided with a foldable part 63, and the open end 61 is welded to the outer wall of the connecting joint 3 by a heat sealing process. Preferably, the closing member 6 is locally thinned in wall thickness to form the frangible portion 63. When the device is used, the closed end 62 of the sealing component 6 is firstly held by hands, force is applied to pull the closed end 62 of the sealing component 6 to break along the easy-to-break part 63, the open end 61 of the sealing component 6 is continuously reserved on the outer wall of the connecting joint 3, the liquid outlet 32 is communicated with the outside, then the liquid storage container 1 is squeezed by hands to be extruded and deformed, the pressure of flushing liquid in the liquid storage cavity 11 is gradually increased until the pressure of the flushing liquid reaches or is greater than a preset value, and the flushing liquid overcomes the resistance applied to the injection port 10 by the pressure applying device 2 to realize flushing. In order to facilitate the product molding, the pressing device 2 is integrally molded with the opening end 61 of the sealing component 6, and the pressing device 2 is a pressing rod formed by extending the outer wall of the opening end 61 of the sealing component 6 along the axial direction thereof to the liquid inlet 31 direction. With continued reference to fig. 4 and 5, the outer wall of the connection joint 3 protrudes outward to form an annular limiting platform 331, and the limiting platform 331 limits the depth of the sealing component 6 connected to the outer wall of the connection joint 3, so that positioning and assembling are facilitated.

As shown in fig. 12, in order to ensure the durability and stability of the pressing portion 21 of the pressing device 2 pressing against the liquid inlet 31, the connecting portion 20 of the pressing device 2 is elastically hinged to the sealing member 6 through a first connecting member 22, specifically, the first connecting member 22 includes a first pin 221 and a first torsion spring 222, the inner side wall of the connecting portion 20 of the pressing device 2 extends outwards to form two symmetrical first seats 205, the outer side wall of the sealing member 6 extends outwards to form two symmetrical second seats 65, the first pin 221 is hinged to the first seats 205 and the second seats 65, the first pin 221 is hinged to the first torsion spring 222, and the first torsion spring 222 is compressed between the connecting portion 20 and the sealing member 6, so that the pressing portion 21 of the pressing device 2 is elastically closed and pressed against the liquid inlet 31. In this embodiment, since the first pin 221 is hinged to the first torsion spring 222, the connection portion 20 and the opening closure member 6 are elastically hinged to each other.

As shown in fig. 7, in order to reduce fatigue loss of the product, ensure product usability, prolong product service life, and prevent loss of product components, before use, the pressing device 2 is in an open state, the connecting portion 20 of the pressing device 2 has a bending section 201 capable of being bent, the wall thickness of the bending section 201 is smaller than that of the part of the pressing device 2 except the bending section 201, so as to facilitate the bending of the pressing device 2, the inner side wall of the pressing device 2 extends outwards to form a hook 4, and the outer side wall of the opening end 61 of the sealing part 6 extends outwards to form a slot 5. Optionally, the connecting portion 20 of the pressing device 2 has a bending section 201 capable of being bent, an inner side wall of the pressing device 2 extends outwards to form the clamping groove 5, and an outer side wall of the opening end 61 of the sealing part 6 extends outwards to form the clamping hook 4. As shown in fig. 8, in use, the pressing portion 21 of the pressing device 2 is first rotated clockwise from the end of the liquid outlet 32 of the connecting joint 3 to the end of the liquid inlet 31 of the connecting joint 3, and then the hook 4 is engaged with the slot 5, so that the pressing device 2 is fixed on the outer side wall of the opening end 61 of the sealing member 6. With reference to fig. 8, alternatively, in order to increase the sealing performance between the pressing portion 21 and the liquid inlet 31, a sealing member 8 is fitted to an inner wall of the pressing portion 21, the sealing member 8 is a gasket, and the pressing portion 21 is sealed with an outer periphery of the liquid inlet 31 by the sealing member 8.

As shown in fig. 6, optionally, the connecting portion 20 of the pressing device 2 is hinged to an outer side wall of the open end 61 of the sealing member 6, the outer side wall of the open end 61 of the sealing member 6 extends outwards to form a hook 4, and the connecting portion 20 of the pressing device 2 penetrates through the slot 5. Optionally, the connecting portion 20 of the pressing device 2 is hinged to an outer side wall of the opening end 61 of the sealing component 6, an outer side wall of the opening end 61 of the sealing component 6 extends outwards to form a clamping groove 5, and an inner side wall of the connecting portion 20 of the pressing device 2 extends outwards to form a clamping hook 4. When the sealing device is used, the pressing part 21 of the pressing device 2 is rotated from one end of the liquid outlet 32 of the connecting joint 3 to one end of the liquid inlet 31 of the connecting joint 3 along the clockwise direction, and then the clamping hook 4 is matched with the clamping groove 5 in a clamping manner, so that the pressing device 2 is fixed on the outer side wall of the opening end 61 of the sealing component 6. With continued reference to fig. 6, optionally, in order to reduce parts, simplify the assembly process, and reduce the manufacturing cost of the product, the inner side wall of the pressing portion 21 protrudes outward to form an annular protrusion 7, and the pressing portion 21 is pressed against the outer peripheral surface of the liquid inlet 31 by the annular protrusion 7 for sealing. Alternatively, the outer periphery of the liquid inlet 31 protrudes outward to form an annular protrusion 7, and the outer periphery of the liquid inlet 31 is pressed against the inner side surface of the pressing portion 21 by the annular protrusion 7 for sealing.

As shown in fig. 9, optionally, the pressing device 2 may be formed separately from the open end 61 of the sealing member 6, the outer side wall of the open end 61 of the sealing member 6 extends outward to form two symmetrical hooks 4, the connecting portion 20 of the pressing device 2 penetrates through the two symmetrical slots 5, and when in use, the hooks 4 are engaged with the slots 5, so that the pressing device 2 is fixed on the outer side wall of the open end 61 of the sealing member 6. Referring to fig. 9, in order to save material, a sealing member 8 is fitted to an inner wall of the pressing portion 21, the sealing member 8 is a gasket, and the pressing portion 21 is sealed from an outer periphery of the liquid inlet 31 by the sealing member 8. Alternatively, a sealing member 8 is fitted to the outer periphery of the liquid inlet 31, the sealing member 8 is a gasket, and the outer periphery of the liquid inlet 31 is sealed with the inner surface of the pressing portion 21 by the sealing member 8.

As shown in fig. 10, optionally, the inner side wall of the connecting portion 20 of the pressing device 2 extends outward to form a U-shaped sleeve 203, and when in use, the U-shaped sleeve 203 is clamped on the outer side wall of the open end 61 of the sealing component 6, so that the pressing device 2 is fixed on the outer side wall of the open end 61 of the sealing component 6, and the assembly process is simple and the connection is convenient and fast.

As shown in fig. 11, optionally, the outer side wall of the opening end 61 of the sealing member 6 extends outward to form two symmetrical sliding grooves 64, the two sides of the connecting portion 20 of the pressing device 2 extend outward to form two symmetrical sliding rails 204, and when in use, the two sliding rails 204 are slidably engaged with the two sliding grooves 64, so that the pressing device 2 is fixed to the outer side wall of the opening end 61 of the sealing member 6, which is simple in assembly process and convenient and fast in connection.

As shown in fig. 13 and 14, the pressing device 2 is an elastic clip formed by two separate bodies, the elastic clip includes two symmetrical clamping components 23, one end of each of the two clamping components 23 is a clamping portion 231, the other end of each of the two clamping components 23 is a holding portion 232, the two clamping components 23 are elastically hinged to each other, specifically, a second connecting component 24 is connected between the two clamping components 23, the second connecting component 24 includes a second pin 241 and a second torsion spring 242, inner side walls of the two clamping components 23 extend outwards to form a pin support 233, the second pin 241 is hinged to the second torsion spring 242, and the second torsion spring 242 is compressed between the two clamping components 23, so that one end of the clamping portion 231 is elastically closed. In this embodiment, since the second torsion spring 242 is hinged to the second pin 241, the two clamping members 23 are elastically hinged to each other. When the clamping device is used, the holding part 232 is pressed inwards by hands, so that the clamping part 231 is elastically opened and clamped on the liquid inlet 31, the clamping is firm, the sealing performance is good, and the operation is convenient. With continued reference to fig. 13, preferably, the two clamping portions 231 are embedded with an elastic member 9 on the outer wall, and the elastic member 9 increases the friction between the clamping portions 231 and the liquid inlet 31, not only preventing the pressing device 2 from falling off, but also making the pressing device 2 clamped more firmly. Optionally, the clamping portion 231 may also be clamped on an outer wall of the container of the liquid storage container 1, so that the inner wall of the container of the liquid storage container 1 is attached to each other to seal the injection port 10, and the clamping is more convenient and labor-saving.

As shown in fig. 15, the pressing device 2 is an integrally formed elastic clip, the elastic clip includes two symmetrical clamping components 23, one end of each of the two clamping components 23 has a clamping portion 231, and the other end of each of the two clamping components 23 has an elastic bending portion 234, the clamping portion 231 is clamped on the outer wall of the liquid storage container 1, so that the inner wall of the liquid storage container 1 is attached to each other to seal the injection port 10, and the structure is simple, the assembly process is simple, and the production cost is low.

Referring to fig. 16, the second embodiment of the prefilled catheter flusher provided by the present invention has substantially the same structure as the first embodiment, and is different therefrom in that:

as shown in fig. 16, optionally, the liquid storage container 1 is made of a medical PE material, and the pressure applying device 2 acts on the liquid inlet 31 by using a magnetic attraction manner to close the injection port 10, specifically, the pressure applying device 2 includes two magnetic components, where the magnetic components are magnets or electromagnets, and one of the two magnetic components is configured to act on the liquid inlet 31, and the other one of the two magnetic components acts on the opposite side of the liquid inlet 31, and the structure is simple and easy to implement.

Referring to fig. 17 and 18, the third embodiment of the prefilled catheter flusher provided by the present invention has substantially the same structure as the first embodiment, except that:

as shown in fig. 17, the pressure applying device 2 is a rubber band or an elastic band, and the pressure applying device 2 is tightened on the outer wall of the liquid storage container 1 in an elastic tightening manner, so that the inner wall of the liquid storage container 1 is attached to each other to close the injection port 10. As shown in fig. 18, the pressing device 2 can also be tightened on the liquid inlet 31 by means of elastic force to close the injection port 10, and the sealing is firmer.

Referring to fig. 19, the fourth embodiment of the prefilled catheter flusher provided by the present invention has substantially the same structure as the first embodiment, and is different therefrom in that:

as shown in fig. 19, the liquid inlet 31 and the liquid outlet 32 are respectively disposed at two ends of the connection joint 3, a pressure applying port 35 is disposed on a side wall of the connection joint 3, the pressure applying port 35, the liquid inlet 31 and the liquid outlet 32 are communicated with each other, an inner side wall of the pressure applying portion 21 of the pressure applying device 2 extends outward to form a hemispherical protrusion 211, the hemispherical protrusion 211 is in interference fit with the pressure applying port 35, and the hemispherical protrusion 211 penetrates through the pressure applying port 35 and then is pressed against a wall of an inner cavity of the connection joint 3, so that the communication between the liquid inlet 31 and the liquid outlet 32 is blocked to close the injection port 10. The container wall 12 covering the pressure applying opening 35 and the liquid storage container 1 is integrally sunken inwards to form a hemispherical recess 121, the hemispherical recess 121 and the hemispherical protrusion 211 are matched, and the sealing performance of the inner cavity wall of the hemispherical protrusion 211 and the inner cavity wall of the connecting joint 3 is guaranteed. For convenience of processing and product forming, optionally, a sealing film is arranged at the pressure applying port 35, the sealing film is arranged independently from the liquid storage container 1, the sealing film is recessed inwards to form a hemispherical recess 121, and the hemispherical protrusion 211 penetrates through the pressure applying port 35 and then is pressed against the inner cavity wall of the connecting joint 3, so that the communication between the liquid inlet 31 and the liquid outlet 32 is blocked and the injection port 10 is closed.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (16)

1. A prefilled catheter flusher, comprising: the device is characterized in that one end of the injection port (10) of the liquid storage container (1) is provided with a pressure applying device (2) capable of closing the injection port (10) from the outside of the liquid storage container (1), and when the pressure of flushing liquid reaches or is larger than a preset value due to deformation of the liquid storage container (1), the flushing liquid overcomes the resistance applied to the injection port (10) by the pressure applying device (2) to realize flushing.

2. The pre-filled catheter flusher according to claim 1, wherein the injection port (10) is hermetically fixed with a connecting joint (3), the connecting joint (3) is used for connecting to a connecting joint of a flushed pipeline, one end of the connecting joint (3) is provided with a liquid inlet (31), the other end of the connecting joint is provided with a liquid outlet (32), the side wall of the connecting joint (3) is provided with a pressure applying port (35), the liquid inlet (31) and the liquid outlet (32) are communicated with each other, and the pressure applying device (2) passes through the pressure applying port (35) and acts on the inner cavity wall of the connecting joint (3) to block the communication between the liquid inlet (31) and the liquid outlet (32) to close the injection port (10).

3. The pre-filled catheter flusher according to claim 2, wherein the liquid storage container (1) covers a container wall (12) of the pressure applying opening (35) and is inwardly recessed to form a hemispherical recess (121) or the pressure applying opening (35) is provided with a sealing film which is inwardly recessed to form the hemispherical recess (121), the outer wall of the pressure applying device (2) extends outwards to form a hemispherical protrusion (211), the hemispherical recess (121) conforms to the hemispherical protrusion (211), and the hemispherical protrusion (211) penetrates through the pressure applying opening (35) and then is pressed against the inner cavity wall of the connecting joint (3) through the hemispherical recess (121).

4. A pre-filled catheter flusher according to claim 1, wherein the injection port (10) is sealingly fixed with a connecting joint (3), the connecting joint (3) is used for connecting to a connecting joint of a pipeline to be flushed, and the pressure applying device (2) acts on the outer container wall of the liquid storage container (1) to enable the inner container wall of the liquid storage container (1) to be attached to each other to close the injection port (10).

5. The pre-filled catheter flusher according to claim 4, wherein the pressure applying device (2) comprises two pressure applying members (25), one end of each pressure applying member (25) is fixed to the connecting joint (3), and the other end of each pressure applying member acts on two opposite sides of the outer wall of the reservoir (1) to enable the inner wall of the reservoir (1) to be attached to each other to close the injection port (10).

6. The pre-filled catheter flusher according to claim 4, further comprising a sealing component (6), wherein the sealing component (6) is sealed at the injection port (10), the sealing component (6) is of a cover-shaped structure with one end closed and the other end open, an open end (61) of the sealing component (6) is sleeved on the outer wall of the connecting joint (3), a folding part (63) is arranged at a closed end (62) of the sealing component (6), the pressing device (2) comprises two pressing components (25), one ends of the two pressing components (25) are formed or fixed on the outer wall of the open end (61) of the sealing component (6), and the other ends of the two pressing components act on two opposite sides of the outer wall of the liquid storage container (1), so that the inner wall of the liquid storage container (1) is attached to each other to close the injection port (10).

7. The pre-filled catheter flusher according to claim 4, wherein the pressure applying device (2) is an elastic clip, and a clamping portion (231) of the elastic clip is clamped on the outer wall of the liquid storage container (1) so that the inner walls of the liquid storage container (1) are attached to each other to close the injection port (10).

8. A prefilled catheter flusher according to claim 1, wherein said injection port (10) is sealingly fixed with a connection fitting (3), said connection fitting (3) is used for connecting to a connection fitting of a flushed pipeline, said connection fitting (3) is provided with a liquid outlet (32) and a liquid inlet (31) which are communicated with each other, said liquid inlet (31) is provided on a side wall of the connection fitting (3), said liquid outlet (32) is communicated with the connection fitting of the flushed pipeline, said liquid inlet (31) is communicated with the liquid storage container (1), and said pressurizing device (2) acts on said liquid inlet (31) to close said injection port (10).

9. A pre-filled catheter flusher according to claim 8, wherein the pressure applying means (2) acts on the liquid inlet (31) by magnetic attraction to close the injection port (10); or, the pressure applying device (2) acts on the liquid inlet (31) by using a mechanical structure to close the injection port (10); or the pressure applying device (2) acts on the liquid inlet (31) in a manner of elastic tension to close the injection port (10).

10. A pre-filled catheter flusher according to claim 9, wherein the pressure applying means (2) is of a pressure bar structure, and one end of the pressure applying means (2) is fixed to the connecting joint (3) and the other end is pressed against the liquid inlet (31).

11. A pre-filled catheter flusher according to claim 8, further comprising a closure member (6), the closure member (6) being closed to the injection port (10).

12. A pre-filled catheter flusher according to claim 11, wherein the sealing member (6) has a cap-like structure with one end closed and the other end open, the open end (61) of the sealing member (6) is sleeved on the outer wall of the connecting joint (3), and the closed end (62) of the sealing member (6) is provided with a frangible portion (63).

13. A pre-filled catheter flusher according to claim 12, wherein the pressure applying means (2) is of a pressure bar construction, one end of the pressure applying means (2) being formed on or fixed to an outer wall of the open end (61) of the closure member (6) and the other end being pressed against the liquid inlet (31).

14. A prefilled catheter flusher according to claim 10 or 13, wherein said pressure applying means (2) is sealed to the outer periphery of said liquid inlet (31) in a face-to-face pressure tight seal; or the sealing mode between the pressure applying device (2) and the periphery of the liquid inlet (31) is that the annular bulge (7) is tightly sealed with the surface; or, the pressing device (2) and the periphery of the liquid inlet (31) are sealed through a sealing part (8).

15. The prefilled catheter flusher according to claim 10 or 13, wherein the pressing device (2) is provided with a bending section (201) and a hook (4)/groove (5), the wall thickness of the bending section (201) is smaller than the wall thickness of the pressing device (2) except the bending section (201), and the connection joint (3) is provided with a groove (5)/hook (4) which is in snap fit with the hook (4)/groove (5); or the pressure applying device (2) is hinged with the connecting joint (3), the pressure applying device (2) is provided with a clamping groove (5)/a clamping hook (4), and the connecting joint (3) is provided with a clamping hook (4)/a clamping groove (5) which is matched with the clamping groove (5)/the clamping hook (4) in a clamping way; or the pressure applying device (2) is elastically hinged with the connecting joint (3).

16. A pre-filled catheter flusher according to claim 8 or 9, wherein the pressure applying means (2) is a resilient clip, a clamping portion (231) of which clamps to the liquid inlet (31) closing the injection port (10).

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