Liquid drainage secure connection device

Abstract

This application relates to the field of medical devices and discloses a safe connection device for fluid drainage. The safe connection device includes: a first connector tube, a second connector tube, a flow stopper, and a connecting tube. One end of the first connector tube is used to connect to a first drainage tube; one end of the second connector tube is used to connect to a second drainage tube, and the other end is connected to the first connector tube; the flow stopper is installed inside at least one of the first and second connector tubes; both ends of the connecting tube can be installed inside the first and second connector tubes respectively, disconnecting or connecting the first and second connector tubes; when connected, the connecting tube passes through the flow stopper to conduct light between the first and second connector tubes; when pulled by external force, the connecting tube can be pulled out from the flow stopper, and the flow stopper re-closes, disconnecting the first and second connector tubes. When the safe connection device is pulled, the first and second connector tubes can move away from each other, preventing displacement of the drainage tubes and potential harm to the patient.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to a safe connection device for fluid drainage. Background Technology

[0002] In some surgical drainage procedures, such as cerebrospinal fluid drainage, a portion of the drainage tube needs to be inserted into the brain cavity so that the inserted end can be inserted into the corresponding organ for drainage. The other end of the drainage tube is connected to a drainage bag outside the body. Because the entire drainage system, located outside the body, is difficult to separate from the drainage bag (or drainage bottle), patients are prone to pulling on the drainage tube during movement after insertion, which can cause damage to brain tissue and hinder recovery. Current practices aim to fix the drainage tube as far as possible outside the body to reduce the direct transmission of pulling force to the internal drainage tube portion. While this improves the risk of dislodgement to some extent, it is still unavoidable that the inserted end can be pulled out when the external pulling force is strong. Accidental tube dislodgement incidents occur in clinical practice. Summary of the Invention

[0003] In view of the above-mentioned problems of traditional drainage pipelines, this application proposes a safe liquid drainage safety connection device for use in drainage pipelines, so as to solve at least some of the problems of traditional drainage pipelines.

[0004] To solve the above-mentioned technical problems, one of the technical solutions adopted in the embodiments of this application is:

[0005] A liquid drainage safety connection device includes: a first connector tube, internally through, with one end for connecting to a first drainage tube; a second connector tube, internally through, with one end for connecting to a second drainage tube, and the other end adaptably connected to the other end of the first connector tube; a flow stopper, assembled inside at least one of the first connector tube and the second connector tube, for sealing at least one of the first connector tube and the second connector tube; and a connecting tube, both ends of which can be adapted and assembled inside the first connector tube and the second connector tube respectively, and can disconnect or connect the first connector tube and the second connector tube; the connecting tube penetrates the flow stopper when connecting the first connector tube and the second connector tube to connect the first connector tube and the second connector tube, and the flow stopper seals the connection of the connecting tube when penetrated; when pulled by an external force, the connecting tube can be pulled out from the flow stopper, the flow stopper re-closes, and the first connector tube and the second connector tube are disconnected.

[0006] In some embodiments, the first connector tube has a first guide channel and a first assembly cavity that are opposite to and communicate with each other; the second connector tube has a second guide channel and a second assembly cavity that are opposite to and communicate with each other; the connecting pipe has a third guide channel and a first connecting port at one end of the third guide channel and a second connecting port at the other end of the third guide channel; the end of the connecting pipe near the first connecting port is designated as a first assembly end, which is movably connected and assembled in the first assembly cavity for communicating with the first guide channel; the end of the connecting pipe near the second connecting port is designated as a second assembly end; the second assembly end is movably connected and assembled in the second assembly cavity for communicating with the second guide channel.

[0007] In some embodiments, the first engaging structure is an annular groove, and the second engaging structure is an annular protrusion; or, the first engaging structure is an annular protrusion, and the second engaging structure is an annular groove. The flow-stopping element includes a first flow-stopping element and a second flow-stopping element; the first flow-stopping element is disposed between the first guide channel and the first assembly cavity, and the second flow-stopping element is disposed between the second guide channel and the second assembly cavity; both the first and second flow-stopping elements have a through-slit for the through-tube to pass through; the through-slit seals the through-tube when it passes through, and re-closes when the through-tube is withdrawn.

[0008] In some embodiments, the connection force between the first assembly end of the conductive pipe and the first assembly cavity of the first connector pipe is less than the connection force between the second assembly end of the conductive pipe and the second assembly cavity of the second connector pipe.

[0009] In some embodiments, the device further includes: a limiting mechanism; the limiting mechanism includes a first limiting protrusion disposed in the first assembly cavity and a second limiting protrusion disposed in the first assembly end; the conductive pipe has a conductive state in which, during drainage, the first conductive port passes through the first flow stopper and the second conductive port passes through the second flow stopper, so that the third flow channel connects the first flow channel and the second flow channel; and a flow-cutting state in which, during removal, the first conductive port is first withdrawn from the first flow stopper, then the first limiting protrusion and the second limiting protrusion abut against each other, and finally the second conductive port is withdrawn from the second flow stopper.

[0010] In some embodiments, a snap-fit ​​mechanism is further included, the snap-fit ​​mechanism including a first snap-fit ​​structure and a second snap-fit ​​structure that are adapted to each other; the first assembly cavity and the second assembly cavity are both provided with the first snap-fit ​​structure, the first assembly end and the second assembly end are both provided with the second snap-fit ​​structure, and in the first assembly cavity, the first limiting protrusion is disposed closer to the first guide channel than the first snap-fit ​​structure, and in the first assembly end, the second limiting protrusion is disposed closer to the first guide port than the second snap-fit ​​structure.

[0011] In some embodiments, the number of first engaging structures provided in the first assembly cavity is less than the number of first engaging structures provided in the second assembly cavity; the number of second engaging structures provided at the first assembly end is less than the number of second engaging structures provided at the second assembly end.

[0012] In some embodiments, the first engaging structure is an annular groove and the second engaging structure is an annular protrusion; or, the first engaging structure is an annular protrusion and the second engaging structure is an annular groove.

[0013] In some embodiments, the conductive fitting includes a conduit and a sleeve, the sleeve elastically covering at least a portion of the outer wall of the conduit; and the second engaging structure and the second limiting protrusion are disposed on the sleeve.

[0014] In some embodiments, an alignment mechanism is further included, the alignment mechanism including a first alignment structure and a second alignment structure that are adapted to each other; the first alignment structure is disposed on the end face of the first end of the first connector, and the second alignment structure is disposed on the end face of the first end of the second connector; the first end of the first connector and the first end of the second connector refer to the ends of the first connector and the second connector that are in contact with each other when connected.

[0015] The liquid drainage safety connection device provided in this application can keep the first connector tube and the second connector tube away from each other under axial force, which can effectively prevent the drainage tube from shifting and causing harm to the patient under the pulling action. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is an exploded schematic diagram of the liquid drainage safety connection device provided in the embodiments of this application;

[0018] Figure 2This is a cross-sectional schematic diagram of the liquid drainage safety connection device provided in the embodiment of this application, showing the assembly relationship between the components in the conductive state;

[0019] Figure 3 This is a cross-sectional schematic diagram of a liquid drainage safety connection device provided in an embodiment of this application, showing one of the assembly relationships between the components in a flow interruption state;

[0020] Figure 4 This is a cross-sectional schematic diagram of the liquid drainage safety connection device provided in the embodiment of this application, showing another assembly relationship between the components in the state of flow interruption;

[0021] Figure 5 This is a cross-sectional schematic diagram of the first connector tube provided in an embodiment of this application;

[0022] Figure 6 This is a cross-sectional schematic diagram of the second connector tube provided in an embodiment of this application;

[0023] Figure 7 This is a cross-sectional schematic diagram of the conductive pipe provided in the embodiment of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100. Liquid drainage safety connection device; 10. First connector tube; 11. First guide channel; 12. First assembly cavity; 10a. First connector outer tube; 11a. First positioning protrusion; 12a. First inner cavity; 13a. First connector; 131a. Connecting thread; 132a. First interface; 10b. First connector inner tube; 11b. First annular periphery; 20. Second connector tube; 21. Second guide channel; 22. Second assembly cavity; 20a. Second connector outer tube; 21a. Second positioning protrusion; 22a. Second inner cavity; 23a. Second connector; 231a. Screw-in protrusion; 232a. Second interface ; 20b. Second connector inner tube; 21b. Second annular perimeter; 30. Flow stopper; 30a. Conducting gap; 31. First flow stopper; 32. Second flow stopper; 40. Conducting pipe fitting; 41. Third guiding channel; 411. First guiding port; 412. Second guiding port; 42. First assembly end; 43. Second assembly end; 40a. Conduit; 40b. Sleeve; 50. Limiting mechanism; 51. First limiting protrusion; 52. Second limiting protrusion; 60. Snap-fit ​​mechanism; 61. First snap-fit ​​structure; 62. Second snap-fit ​​structure; 70. Alignment mechanism; 71. First alignment structure; 72. Second alignment structure. Detailed Implementation

[0026] The present invention will now be described in detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0027] It should be noted that, unless otherwise expressly specified and limited, the terms "center," "longitudinal," "lateral," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., used in this specification to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. The terms "installed," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features; thus, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more; and "and / or" includes any and all combinations of one or more related listed items. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] like Figure 1 and Figure 2 The liquid drainage safety connection device 100 provided in this application includes: a first connector tube 10, a second connector tube 20, a flow stopper 30, and a connecting tube 40. The first connector tube 10 is internally connected, with one end for connecting to a first drainage tube. The second connector tube 20 is internally connected, with one end for connecting to a second drainage tube. The other ends of the first connector tube 10 and the second connector tube 20 can be adapted and connected. The flow stopper 30 is installed inside at least one of the first connector tube 10 and the second connector tube 20, for sealing at least one of the first connector tube 10 and the second connector tube 20. Both ends of the connecting tube 40 can be adapted and installed inside the first connector tube 10 and the second connector tube 20 respectively, and can disconnect or connect the first connector tube 10 and the second connector tube 20. When connecting the first connector tube 10 and the second connector tube 20, the connecting tube 40 penetrates the flow stopper 30 to conduct the first connector tube 10 and the second connector tube 20. When the flow stopper 30 is penetrated, it seals the connection of the connecting tube 40. When pulled by an external force, the connecting pipe 40 can be pulled out from the flow stopper 30, the connecting pipe 40 disconnects, causing the first connector pipe 10 and the second connector pipe 20 to disconnect, and the flow stopper 30 re-closes.

[0029] The first connector tube 10 has two opposing ends. One end is a first guide channel 11, used to connect to one end of the first drainage tube, and the other end is a first assembly cavity 12, used to connect to one end of the connecting tube 40. The first guide channel 11 and the first assembly cavity 12 are connected. Similarly, the second connector tube 20 has two opposing ends. One end is a second guide channel 21, used to connect to one end of the second drainage tube, and the other end is a second assembly cavity 22, used to connect to the other end of the connecting tube 40. The second guide channel 21 and the second assembly cavity 22 are connected. It should be noted that in this application, the first drainage tube refers to a drainage tube placed inside the patient's body, serving as an upstream conduit for the flow of drainage fluid, used to drain the drainage fluid from the patient's body. The second drainage tube refers to a drainage tube connected to a drainage bag, serving as a downstream conduit for the flow of drainage fluid, used to collect the outflowing drainage fluid.

[0030] The flow-stopping element 30 includes a first flow-stopping element 31 and a second flow-stopping element 32, and both the first flow-stopping element 31 and the second flow-stopping element 32 are provided with a through gap 30a (e.g., Figure 3 The first flow stopper 31 is disposed between the first flow guide channel 11 and the first assembly cavity 12, and the second flow stopper 32 is disposed between the second flow guide channel 21 and the second assembly cavity 22. The guiding gap 30a has an open state when the guiding tube 40 passes through and a closed state after the guiding tube 40 is withdrawn, so as to allow the flow and cut off of the drainage fluid. Furthermore, the flow stopper 30 can be made of a material with elastic properties (e.g., silicone, rubber). To ensure the sealing effect of the flow stopper 30 at its assembly point, the shape of the flow stopper 30 is designed to fit the inner wall of the assembly cavity (first assembly cavity 12, second assembly cavity 22), for example, in some embodiments, it is designed as a circular sheet.

[0031] The connecting pipe fitting 40 is provided with a third flow channel 41, a first flow port 411 at one end of the third flow channel 41, and a second flow port 412 at the other end of the third flow channel 41. The end of the connecting pipe fitting 40 near the first flow port 411 is designated as a first assembly end 42, which is movably connected and assembled in a first assembly cavity 12 to connect to the first flow channel 11. The end of the connecting pipe fitting 40 near the second flow port 412 is designated as a second assembly end 43, which is movably connected and assembled in a second assembly cavity 22 to connect to the second flow channel 21. Furthermore, the connecting force of the first assembly end 42 in the first assembly cavity 12 is less than the connecting force of the second assembly end 43 in the second assembly cavity 22, so that under the pulling force of an external force, the first assembly end 42 of the connecting pipe fitting 40 can be detached before the second assembly end 43.

[0032] Furthermore, the liquid drainage safety connection device 100 also includes a limiting mechanism 50. The limiting mechanism 50 includes a first limiting protrusion 51 and a second limiting protrusion 52. The first limiting protrusion 51 is disposed in the first assembly cavity 12, and the second limiting protrusion 52 is disposed on the first assembly end 42.

[0033] The guide pipe 40 can have the following characteristics: during flow diversion, the first guide port 411 passes through the first flow stop 31, and the second guide port 412 passes through the second flow stop 32, so that the third guide channel 41 achieves a conductive state connecting the first guide channel 11 and the second guide channel 21; and during removal, the first guide port 411 is first withdrawn from the first flow stop 31, then the first limiting protrusion 51 and the second limiting protrusion 52 abut against each other, and finally the second guide port 412 is withdrawn from the second flow stop 32, resulting in a flow interruption state.

[0034] This application sets the connection force of the movable connection of the first assembly end 42 in the first assembly cavity 12 to be less than the connection force of the movable connection of the second assembly end 43 in the second assembly cavity 22. When the liquid drainage safety connection device 100 is subjected to axial force pulling, the first connector tube 10 and the second connector tube 20 can be moved away from each other, and the drainage tube can be disconnected. This can effectively avoid the drainage tube shifting under the pulling action and causing harm to the patient. In addition, the first guide port 411 is withdrawn from the guide gap 30a before the second guide port 412, which can cut off the upstream drainage fluid in time, avoid the upstream drainage fluid from being contaminated, and effectively reduce the risk of infection to the patient.

[0035] like Figure 4 The liquid drainage safety connection device 100 also includes a snap-fit ​​mechanism 60, which includes a first snap-fit ​​structure 61 and a second snap-fit ​​structure 62 that are mutually adapted to each other. The second snap-fit ​​structure 62 is made of an elastic material. Specifically, the first assembly cavity 12 and the second assembly cavity 22 are both provided with the first snap-fit ​​structure 61, and the first assembly end 42 and the second assembly end 43 are both provided with the second snap-fit ​​structure 62. Furthermore, in the first assembly cavity 12, the first limiting protrusion 51 is positioned closer to the first guide channel 11 than the first snap-fit ​​structure 61. In other words, the first snap-fit ​​structure 61 is closer to the port of the first end of the first connector tube 10 than the first limiting protrusion 51. Correspondingly, on the first assembly end 42, the second snap-fit ​​structure 62 is positioned further away from the first guide port 411 than the second limiting protrusion 52. It should be noted that the first end of the first connector tube 10 refers to the end of the first connector tube 10 that is away from the first guide channel 11.

[0036] Furthermore, the number of first engaging structures 61 provided in the first assembly cavity 12 is less than the number of first engaging structures 61 provided in the second assembly cavity 22, and the number of second engaging structures 62 provided in the first assembly end 42 is less than the number of second engaging structures 62 provided in the second assembly end 43. Further, the number of second engaging structures 62 provided in the first assembly end 42 is equal to the number of first engaging structures 61 provided in the first assembly cavity 12, and the number of second engaging structures 62 provided in the second assembly end 43 is equal to the number of first engaging structures 61 provided in the second assembly cavity 22. After the first assembly end 42 is assembled into the first assembly cavity 12, the second engaging structures 62 provided in the first assembly end 42 and the first engaging structures 61 provided in the first assembly cavity 12 engage one-to-one, forming a... Figure 2 The first through-port 411 shown is in a connected state through the first stopper 31; after the second assembly end 43 is assembled into the second assembly cavity 22, the second engaging structure 62 provided on the second assembly end 43 and the first engaging structure 61 provided on the second assembly end 43 are engaged one-to-one, forming a connection as shown in the figure. Figure 2 The second through-hole 412 shown is connected to the second flow stop 32. Therefore, the connecting force of the first assembly end 42 in the first assembly cavity 12 is less than the connecting force of the second assembly end 43 in the second assembly cavity 22.

[0037] Furthermore, in the embodiments of this application, the first engaging structure 61 can be an annular groove, and the second engaging structure 62 can be an annular protrusion, with the annular protrusion and the annular groove being adapted to each other.

[0038] Specifically, the number of annular grooves in the first assembly cavity 12 is less than the number of annular grooves in the second assembly cavity 22, the number of annular protrusions in the first assembly end 42 is equal to the number of annular grooves in the first assembly cavity 12, and the number of annular protrusions in the second assembly end 43 is equal to the number of annular grooves in the second assembly cavity 22. That is, the number of annular protrusions in the first assembly end 42 is less than the number of annular protrusions in the second assembly end 43. For example, there may be one annular groove in the first assembly cavity 12 and three annular grooves in the second assembly cavity 22. Correspondingly, there may be one annular protrusion in the first assembly end 42 and three annular protrusions in the second assembly end 43, so that the connecting force of the first assembly end 42 in the first assembly cavity 12 is less than the connecting force of the second assembly end 43 in the second assembly cavity 22. Thus, when the guide pipe 40 is pulled away by an external force, the first guide port 411 can be withdrawn from the first stop member 31 first, then the first limiting protrusion 51 and the second limiting protrusion 52 abut against each other, and finally the second guide port 412 is withdrawn from the second stop member 32.

[0039] In some embodiments, the first engaging structure 61 can be an annular protrusion, and the second engaging structure 62 can be an annular groove. Specifically, in this embodiment, the number of annular protrusions in the first assembly cavity 12 is less than the number of annular protrusions in the second assembly cavity 22, the number of annular grooves in the first assembly end 42 is equal to the number of annular protrusions in the first assembly cavity 12, and the number of annular grooves in the second assembly end 43 is equal to the number of annular protrusions in the second assembly cavity 22. That is, the number of annular grooves in the first assembly end 42 is less than the number of annular grooves in the second assembly end 43. Similarly, the connecting force of the first assembly end 42 in the first assembly cavity 12 is less than the connecting force of the second assembly end 43 in the second assembly cavity 22. Thus, when the conductive tube 40 is pulled out by an external force, the first conductive port 411 can be withdrawn from the first stop member 31 first, then the first limiting protrusion 51 and the second limiting protrusion 52 abut against each other, and finally the second conductive port 412 is withdrawn from the second stop member 32.

[0040] The surfaces of the annular groove and the annular protrusion can be configured as smooth surfaces, for example, as arcuate surfaces with a preset radial dimension. This smooth surface design of the annular groove and the annular protrusion makes it easier for the end of the connecting tube 40 to be fitted into the first connector tube 10 and / or the second connector tube 20, or, when the liquid drainage safety connection device 100 is subjected to external force, the end of the connecting tube 40 can more easily disengage from the snap-fit ​​between the first connector tube 10 and / or the second connector tube 20, thereby disconnecting the drainage pipeline.

[0041] like Figure 4 The liquid drainage safety connection device 100 also includes an alignment mechanism 70, which includes a first alignment structure 71 and a second alignment structure 72 that are adapted to each other.

[0042] The first alignment structure 71 is disposed on the end face of the first end of the first connector 13a, and the second alignment structure 72 is disposed on the end face of the first end of the second connector 23a. The first alignment structure 71 and the second alignment structure 72 cooperate with each other to form a precise positioning and docking between the first connector 13a and the second connector 23a, thereby achieving a reliable and convenient connection.

[0043] It should be noted that the first end of the second connector tube 20 refers to the end of the second connector tube 20 that is away from the second guide channel 21, that is, the end of the second connector tube 20 that is opposite to or connected to the first connector tube 10 when the liquid drainage safety connection device 100 is in the conducting state.

[0044] In this embodiment of the application, the first alignment structure 71 may be an alignment protrusion provided on the first end face of the first connector tube 10, and the second alignment structure 72 may be an alignment groove provided on the first end face of the second connector tube 20, with the alignment protrusion and the alignment groove being mutually compatible; or, the first alignment structure 71 may be an alignment groove, and the second alignment structure 72 may be an alignment protrusion.

[0045] In terms of shape, both the alignment protrusion and the alignment groove can be configured as matching annular shapes. It is understood that the alignment protrusion and the alignment groove can also be configured as any other suitable shape. For example, the alignment protrusion can also be configured as an arc-shaped protrusion extending circumferentially along the end face, and the alignment groove can be configured as an arc-shaped groove extending circumferentially along the end face. Alternatively, the alignment protrusion can also be configured as multiple protrusions distributed circumferentially along the end face, and the alignment groove can be configured as multiple grooves distributed circumferentially along the end face. This application does not specifically limit the shape of the alignment protrusion and the alignment groove, as long as the alignment protrusion and the alignment groove can ensure accurate docking between the first connector tube 10 and the second connector tube 20 after mating.

[0046] like Figure 5 The first connector tube 10 may include a first connector outer tube 10a and a first connector inner tube 10b. The first assembly cavity 12 described in this application may be located in the first connector inner tube 10b, and the first alignment structure 71 may be located on the end face of the first end of the first connector outer tube 10a or the end face of the first end of the first connector inner tube 10b. Furthermore, both the first connector outer tube 10a and the first connector inner tube 10b may be manufactured from plastic material, for example, ABS plastic.

[0047] It should be noted that, for ease of description, the first end of the first connector outer tube 10a and the first end of the first connector inner tube 10b mentioned in this application are both the first end of the first connector tube 10, and the second end of the first connector outer tube 10a and the second end of the first connector inner tube 10b are both the second end of the first connector tube 10.

[0048] Please continue reading. Figure 5 The outer tube 10a of the first connector is provided with an annular first positioning protrusion 11a. The first positioning protrusion 11a divides the internal space of the outer tube 10a of the first connector into a communicating first inner cavity 12a and a first connector 13a. The first inner cavity 12a is used to assemble the inner tube 10b of the first connector, and the first connector 13a is used to connect the first drainage tube.

[0049] Specifically, at least a portion of the inner tube 10b of the first connector is detachably assembled into the first inner cavity 12a. The first flow stop 31 is assembled into the first inner cavity 12a, and its four peripheral edges are abutted and fixed to the first positioning protrusion 11a by the inner tube 10b of the first connector that extends into the first inner cavity 12a.

[0050] Furthermore, the inner wall of the first inner cavity 12a may be provided with an internal thread, and correspondingly, the inner tube 10b of the first connector is provided with an external thread away from the outer wall of the first assembly cavity 12. Moreover, a protruding first annular periphery 11b may be provided at the end of the inner tube 10b of the first connector.

[0051] In the actual assembly process, the external thread of the inner tube 10b of the first connector engages with the internal thread of the inner cavity 12a until the first annular periphery 11b at the end of the inner tube 10b of the first connector abuts against the first end face of the outer tube 10a of the first connector, so that the inner tube 10b of the first connector can be assembled and fixed in the inner cavity 12a.

[0052] Those skilled in the art will understand that the connection between the inner tube 10b and the outer tube 10a of the first connector is not limited to the aforementioned threaded structure. In some embodiments, other suitable methods can also be used to achieve a detachable fixed connection. For example, the shaft diameter of the inner tube 10b can be designed to be slightly larger than the shaft diameter of the first inner cavity 12a, so that the inner tube 10b is assembled into the outer tube 10a of the first connector in an interference fit manner; or, a protruding locking structure can be provided on the outer wall of the inner tube 10b of the first connector, and a corresponding recessed locking groove structure can be provided on the inner wall of the first inner cavity 12a, so that the inner tube 10b of the first connector is assembled into the outer tube 10a of the first connector in a snap-fit ​​connection manner.

[0053] Please continue reading. Figure 5 In some embodiments, the first connector 13a includes a connecting thread 131a and a first interface 132a. The connecting thread 131a may be disposed on the inner wall of the port at the second end of the outer tube 10a of the first connector, and the first interface 132a protrudes from the first positioning protrusion 11a toward the port at the second end of the outer tube 10a of the first connector.

[0054] During the connection process between the first drainage tube and the first connector tube 10, firstly, the first connector tube 10 aligns the first interface 132a with the opening of the first drainage tube. Then, the connecting thread 131a engages with the external thread pre-set on the first drainage tube. As the engagement between the internal and external threads proceeds, the first interface 132a gradually extends into the opening, thereby securely assembling the first connector tube 10 to the end of the first drainage tube.

[0055] like Figure 6The second connector tube 20 includes a second connector outer tube 20a and a second connector inner tube 20b. The second assembly cavity 22 described in this application can be located in the second connector inner tube 20b, and the second alignment structure 72 can be located on the end face of the first end of the second connector outer tube 20a or the end face of the first end of the second connector inner tube 20b. Furthermore, both the second connector outer tube 20a and the second connector inner tube 20b can be manufactured from plastic material, such as ABS plastic.

[0056] It should be noted that, for ease of description, the first end of the second connector outer tube 20a and the first end of the second connector inner tube 20b mentioned in this application are both the first end of the second connector tube 20, and the second end of the second connector outer tube 20a and the second end of the second connector inner tube 20b are both the second end of the second connector tube 20.

[0057] The outer tube 20a of the second connector has an annular second positioning protrusion 21a inside. The second positioning protrusion 21a divides the internal space of the outer tube 20a of the second connector into a communicating second inner cavity 22a and a second connector 23a. The second inner cavity 22a is used to assemble the inner tube 20b of the second connector, and the second connector 23a is used to connect the second drainage tube.

[0058] Specifically, at least a portion of the second connector inner tube 20b is detachably assembled into the second inner cavity 22a. The second flow stop 32 is assembled into the second inner cavity 22a, and its four peripheral edges are abutted and fixed to the second positioning protrusion 21a by the second connector inner tube 20b extending into the second inner cavity 22a.

[0059] Furthermore, the inner wall of the second inner cavity 22a may be provided with internal threads, and correspondingly, the outer wall of the second connector inner tube 20b opposite to the second assembly cavity 22 may be provided with external threads. Moreover, a protruding second annular periphery 21b may be provided at the end of the second connector inner tube 20b.

[0060] In the actual assembly process, the external thread of the inner tube 20b of the second connector and the internal thread of the second inner cavity 22a are screwed together until the second annular periphery 21b of the inner tube 20b of the second connector abuts against the first end face of the outer tube 20a of the second connector, so that the inner tube 20b of the second connector can be assembled and fixed in the second inner cavity 22a.

[0061] Those skilled in the art will understand that the connection between the inner tube 20b and the outer tube 20a of the second connector is not limited to the aforementioned threaded structure. In some embodiments, other suitable methods can also be used to achieve a detachable fixed connection. For example, the shaft diameter of the inner tube 20b can be designed to be slightly larger than the shaft diameter of the second inner cavity 22a, so that the inner tube 20b is assembled into the outer tube 20a of the second connector in an interference fit manner; or, a protruding locking structure can be provided on the outer wall of the inner tube 20b of the second connector, and a corresponding recessed locking groove structure can be provided on the inner wall of the second inner cavity 22a, so that the inner tube 20b is assembled into the outer tube 20a of the second connector in a snap-fit ​​connection manner.

[0062] Please continue reading. Figure 6 The shaft diameter of the second end of the second connector outer tube 20a can be set to be smaller than the shaft diameter of the first end of the second connector outer tube 20a, so that a second positioning protrusion 21a is formed inside the second connector outer tube 20a at the location of the shaft diameter change, and at the same time, a positioning end face is formed outside the second connector outer tube 20a at the location of the shaft diameter change. The second end of the second connector outer tube 20a with the smaller shaft diameter serves as the second interface 232a. The outer wall of the second interface 232a can be provided with a screw-on protrusion 231a to facilitate connection with the opening of the second drainage tube, thereby constituting a second connector 23a that can stably connect to the second drainage tube.

[0063] In the actual assembly process, firstly, the second connector 23a is aligned with the opening of the second drainage tube with the second interface 232a. Then, the second connector tube 20 is rotated in the same direction as the rotation of the screwing protrusion 231a, so that the second connector 23a of the second connector tube 20 can be gradually screwed into the opening, thereby firmly assembling the second connector tube 20 to the end of the second drainage tube.

[0064] like Figure 3 The flow stopper 30 has a guiding gap 30a in the middle. The shape of the guiding gap 30a can be, but is not limited to, a dot, a straight line, a cross, or a star shape. The flow stopper 30 can be made of elastic material, including but not limited to rubber, silicone, etc.

[0065] When the conduit 40 passes through the conduit gap 30a, interference occurs between the conduit 40 and the stopper 30. The stopper 30 opens the conduit gap 30a to allow the conduit 40 to pass through. After the conduit 40 passes through the conduit gap 30a, the stopper 30 undergoes elastic deformation, generating an elastic restoring force. Under the action of this elastic restoring force, the stopper 30 tightly wraps around the surface of the conduit 40 to form a sealed connection, allowing the drainage fluid to flow through the conduit 40. When the conduit 40 is removed from the conduit gap 30a, the interference between the stopper 30 and the conduit 40 is eliminated, and the opening of the conduit gap 30a closes again under the action of the elastic restoring force, thus cutting off the flow of the drainage fluid.

[0066] To further improve the assembly adaptability of the flow stop 30, the first flow stop 31 may be provided with an annular groove. Correspondingly, the surface of the first positioning protrusion 11a opposite to the first flow stop 31 may be provided with an annular boss. After the first flow stop 31 is assembled into the first inner cavity 12a, the mutual cooperation between the annular groove and the annular boss allows the first flow stop 31 to form a good positioning assembly in the first inner cavity 12a.

[0067] For the same reason, the second flow stop 32 can also be provided with an annular groove. Correspondingly, the surface of the second positioning protrusion 21a opposite to the second flow stop 32 can be provided with an annular boss. After the second flow stop 32 is assembled into the second inner cavity 22a, the second flow stop 32 can form a good positioning assembly in the second inner cavity 22a through the mutual cooperation between the annular groove and the annular boss.

[0068] like Figure 7 The conduit 40 includes a conduit 40a and a sleeve 40b. The conduit 40a can be made of stainless steel, and the sleeve 40b can be made of an elastic material, including but not limited to rubber, silicone, etc. The inner diameter of the sleeve 40b can be set slightly smaller than the outer diameter of the conduit 40a, so that at least a portion of the outer wall of the conduit 40a can be tightly covered by the sleeve 40b. Furthermore, the diameters at both ends of the conduit 40a are smaller than the diameter at the middle, to prevent blockage of the third drainage channel 41 due to insufficient diameter, thereby improving the drainage effect.

[0069] The third guide channel 41 described in this application can be provided on the guide tube 40a, and the second limiting protrusion 52 and the second engaging structure 62 described in this application can be provided on the sleeve 40b. The second limiting protrusion 52 can be a protrusion or a protruding ring provided on the outer wall of the sleeve 40b, and the second engaging structure 62 can be a protruding ring provided on the outer wall of the sleeve 40b. Correspondingly, the first limiting protrusion 51 can be a protrusion or a protruding ring provided on the inner wall of the first assembly cavity 12, and the first engaging structure 61 can be a groove provided on the inner wall of the first assembly cavity 12 and the inner wall of the second assembly cavity 22.

[0070] The connecting pipe fitting 40 can be pre-assembled inside the first connector tube 10. During the assembly of the connecting pipe fitting 40 into the first connector tube 10, firstly, the second assembly end 43 of the connecting pipe fitting 40 passes through the first assembly cavity 12 from the second end of the first connector inner tube 10b and then extends out from the first end of the first connector inner tube 10b. Next, the first connector inner tube 10b is assembled into the first inner cavity 12a of the first connector outer tube 10a. Thus, when the connecting pipe fitting 40 is subjected to a pulling force, the second limiting protrusion 52 of the connecting pipe fitting 40 can abut against the first limiting protrusion 51 of the first assembly cavity 12, thereby preventing the connecting pipe fitting 40 from completely detaching from the first connector tube 10, effectively preventing the connecting pipe fitting 40 from falling off, and avoiding contamination of the liquid drainage safety connection device 100.

[0071] To facilitate a better understanding of the implementation scheme of this application, and in conjunction with actual application scenarios, the connection process and protection process of the liquid drainage safety connection device 100 are described and introduced in detail.

[0072] S11. Assemble the first connector tube 10 onto the first drainage tube:

[0073] The second end of the first connector tube 10 is connected to the end of the first drainage tube exposed outside the patient's body. When connecting, firstly, the first interface 132a is aligned with the end of the first drainage tube. Then, the first connector tube 10 is screwed so that the connecting thread 131a of the first connector tube 10 is engaged with the thread at the end of the first drainage tube.

[0074] S12. Assemble the second connector tube 20 onto the second drainage tube:

[0075] Connect the second end of the second connector tube 20 to the end of the second drainage tube that communicates with the drainage bag. When connecting, align the second interface 232a with the end of the tube inserted into the second drainage tube.

[0076] S13. Connect the first connector tube 10 and the second connector tube 20:

[0077] The first assembly end 42 of the conductive pipe 40 is snapped into place with the first assembly cavity 12 of the first connector pipe 10, and the second assembly end 43 of the conductive pipe 40 is snapped into place with the second assembly cavity 22 of the second connector pipe 20. At the same time, the first alignment structure 71 of the first connector pipe 10 and the second alignment structure 72 of the second connector pipe 20 form a mating connection. Thus, the assembly process of the liquid drainage safety connection device 100 in the drainage pipeline is completed.

[0078] When subjected to external force under certain circumstances, firstly, the first opening 411 of the conductive pipe 40 is withdrawn from the conductive gap 30a of the first stopper 31. As the external force continues to act, the first assembly end 42 and the first assembly cavity 12 disengage and interlock. Then, the second limiting protrusion 52 and the first limiting protrusion 51 abut against each other, thus restricting the movement of the conductive pipe 40 out of the first connector pipe 10. Next, the second opening 412 of the conductive pipe 40 is withdrawn from the conductive gap 30a of the second stopper 32. Finally, the second assembly end 43 gradually disengages from the first assembly cavity 12, that is, the interlocking area between the second assembly end 43 and the second assembly cavity 22 gradually decreases until the second assembly end 43 of the conductive pipe 40 is completely disengaged from the second assembly cavity 22, thereby releasing the connection.

[0079] Therefore, by connecting the liquid drainage safety connection device 100 provided in this application to the drainage tube, when the liquid drainage safety connection device 100 is accidentally pulled, the connecting tube 40 can be released from the first connector tube 10 first, thereby disconnecting the upstream of the drainage fluid in time, effectively reducing the pollution of the upstream of the drainage fluid by the external environment and avoiding the risk of infection to the patient; moreover, when subjected to external force, the first connector tube 10 and the second connector tube 20 can be released, effectively reducing the injury to the patient caused by the pulling during the pulling process; in addition, the snap-fit ​​between the first connector tube 10, the second connector tube 20 and the connecting tube 40 can ensure that the connection can still be maintained when subjected to slight pulling, avoiding the disconnection of the drainage tube caused by slight pulling.

[0080] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention, but it should not be construed as limiting the specific implementation of the invention to these descriptions. Those skilled in the art will recognize that various modifications and improvements can be made without departing from the concept of the present invention, and all such modifications and improvements fall within the scope of protection of the present invention.

Claims

1. A liquid drainage safety connection device, characterized in that, include: The first connector tube is internally connected, and one end is used to connect to the first drainage tube. The second connector tube is internally connected, with one end used to connect to the second drainage tube, and the other end can be adapted and combined with the other end of the first connector tube. A flow stopper is assembled inside at least one of the first connector tube and the second connector tube to seal at least one of the first connector tube and the second connector tube. The conductive pipe fitting has two ends that can be respectively adapted and assembled inside the first connector pipe and the second connector pipe, and can be disconnected or connected to the first connector pipe and the second connector pipe. When the connecting pipe is connected to the first connector pipe and the second connector pipe, it passes through the stopper to conduct the first connector pipe and the second connector pipe. When the stopper is penetrated, it seals the connection of the connecting pipe. When pulled by an external force, the conductive pipe can be pulled out from the flow stopper, and the flow stopper re-closes, thus disconnecting the first connector pipe and the second connector pipe. The first connector tube is provided with a first guide channel and a first assembly cavity that are opposite to and communicate with each other; the second connector tube is provided with a second guide channel and a second assembly cavity that are opposite to and communicate with each other; the connecting pipe is provided with a third guide channel, a first connecting port at one end of the third guide channel, and a second connecting port at the other end of the third guide channel. The end of the conductive pipe near the first conductive port is designated as the first assembly end, which is movably connected and assembled in the first assembly cavity to connect the first guide channel. The end of the guide pipe near the second guide port is designated as the second assembly end; the second assembly end is movably connected and assembled in the second assembly cavity for connecting the second guide channel; The connection force between the first assembly end of the conductive pipe and the first assembly cavity of the first connector pipe is less than the connection force between the second assembly end of the conductive pipe and the second assembly cavity of the second connector pipe.

2. The liquid drainage safety connection device as described in claim 1, characterized in that, The flow-stopping element includes a first flow-stopping element and a second flow-stopping element; the first flow-stopping element is disposed between the first flow guide channel and the first assembly cavity, and the second flow-stopping element is disposed between the second flow guide channel and the second assembly cavity; Both the first flow stopper and the second flow stopper have a flow gap for the flow tube to pass through; the flow gap seals the flow tube when it passes through and closes again when the flow tube is pulled out.

3. The liquid drainage safety connection device as described in claim 2, characterized in that, Also includes: A limiting mechanism; the limiting mechanism includes a first limiting protrusion disposed in the first assembly cavity and a second limiting protrusion disposed at the first assembly end; The conductive pipe fitting has the following characteristics: when diverting flow, the first conductive port passes through the first flow stopper, and the second conductive port passes through the second flow stopper, so that the third flow channel connects the first flow channel and the second flow channel in a conductive state. When the device is removed, the first conduit is first withdrawn from the first flow stopper, then the first limiting protrusion and the second limiting protrusion abut against each other, and finally the second conduit is withdrawn from the second flow stopper, resulting in a flow interruption state.

4. The liquid drainage safety connection device as described in claim 3, characterized in that, It also includes a snap-fit ​​mechanism, which includes a first snap-fit ​​structure and a second snap-fit ​​structure that are mutually adapted to each other; the first assembly cavity and the second assembly cavity are both provided with the first snap-fit ​​structure, and the first assembly end and the second assembly end are both provided with the second snap-fit ​​structure; In the first assembly cavity, the first limiting protrusion is positioned closer to the first guide channel than the first engaging structure, and in the first assembly end, the second limiting protrusion is positioned closer to the first guide port than the second engaging structure.

5. The liquid drainage safety connection device as described in claim 4, characterized in that, The number of first engaging structures in the first assembly cavity is less than the number of first engaging structures in the second assembly cavity; The number of second engaging structures provided at the first assembly end is less than the number of second engaging structures provided at the second assembly end.

6. The liquid drainage safety connection device as described in claim 5, characterized in that, The first engaging structure is an annular groove, and the second engaging structure is an annular protrusion; or, the first engaging structure is an annular protrusion, and the second engaging structure is an annular groove.

7. The liquid drainage safety connection device as described in claim 4, characterized in that, The conductive fitting includes a conduit and a sleeve, the sleeve elastically covering at least a portion of the outer wall of the conduit; and the second engaging structure and the second limiting protrusion are disposed on the sleeve.

8. The liquid drainage safety connection device as described in any one of claims 1-7, characterized in that, It also includes an alignment mechanism, which includes a first alignment structure and a second alignment structure that are adapted to each other; the first alignment structure is disposed on the end face of the first end of the first connector of the first connector tube, and the second alignment structure is disposed on the end face of the first end of the second connector of the second connector tube; the first end of the first connector and the first end of the second connector refer to the ends of the first connector and the second connector that are in contact with each other when they are connected. The first alignment structure is an annular alignment protrusion, and the second alignment structure is an annular alignment groove. The cross-sectional shapes of the annular alignment protrusion and the annular alignment groove are adapted to each other, and both are continuously extended along the circumferential direction of the end face.

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