A blood filtration line connection mechanism

Abstract

The present application relates to dialysis pipeline connection technical field, disclose a kind of blood filtration pipeline connection mechanism, including main component, including sleeve, connecting pipe and infusion tube, connecting pipe is slid in sleeve, infusion tube is fixed in sleeve end;Protection assembly is set on sleeve.The present application has beneficial effect for: telescopic tube cooperation connector setting, so that connecting pipe can be stretched out of sleeve after being inserted into connector, to complete and the connection of connector, maximum limit to prevent connecting pipe from being contaminated, and staff need not to be additionally fixed to connecting pipe, connecting pipe can be positioned block clamping fixed, improve the use efficiency of device;When negative pressure pipe works, detection piece can limit sealing cover, so that sealing cover cannot be opened after automatically sealing sleeve end, to prevent staff from forgetting to seal sleeve end, while preventing the infection risk caused by accidental opening of sealing cover.

Description

Technical Field

[0001] This invention relates to the field of dialysis tubing connection technology, and in particular to a blood filtration tubing connection mechanism. Background Technology

[0002] In the medical field, hemodialysis is a crucial treatment, especially for patients with kidney failure. Dialysis machines are essential life-sustaining devices. During dialysis, blood is drawn out of the body through a series of tubing, purified by the dialyzer, and then returned to the body. In this process, the blood filtration tubing connection mechanism plays a key role in connecting the dialysis machine to the internal fistula tubing in the body.

[0003] However, existing blood filtration tubing connection mechanisms have significant shortcomings in design and use, especially when disconnected. Since blood or other therapeutic fluids often remain inside the tubing, these fluids can easily drip from the connection port, causing environmental pollution and potentially leading to cross-infection. Furthermore, after disconnection, the ports of existing tubing connections are often exposed, increasing the risk of dripping and making it easy for medical staff or patients' families to touch the ports during operation. If a person's skin comes into contact with a potentially virus- or bacteria-laden port, infection could occur, posing a potential threat to patient treatment outcomes and the occupational safety of medical personnel. While existing technology includes caps to seal the tubing ports, staff often forget to do so, and even after sealing, the caps can still be opened, posing a safety hazard. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned blood filtration tubing connection mechanism, the present invention is proposed.

[0005] Therefore, the problem that this invention aims to solve is that when using existing blood filtration tubing connection mechanisms, residual liquid in the tubing is prone to dripping from the port, and staff often forget to seal the tubing port, making the exposed port prone to infection risks.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a blood filtration tubing connection mechanism, comprising a main body component including a sleeve, a connecting tube, and an infusion tube, wherein the connecting tube slides within the sleeve, and the infusion tube is fixed to the end of the sleeve; A protective assembly, disposed on the sleeve, includes a protective sleeve fixed to the surface of the sleeve, a support base fixed to the surface of the protective sleeve, a rotating rod hinged inside the support base, a sealing cap fixed to the other end of the rotating rod, a telescopic tube fixed to one end of the connecting pipe, a flexible tube fixed to the other end of the telescopic tube, a support ring fixed to the surface of the flexible tube, the support ring fixed to the inner wall of the sleeve, a guide tube fixed to the surface of the flexible tube, a sealing plug inserted into the guide tube, a piston fixed to the top of the sealing plug, a negative pressure tube fixed to the surface of the sleeve, the piston sliding inside the negative pressure tube, a first spring fixed to the bottom of the piston, a positioning ring fixed to the inner wall of the negative pressure tube, and a through hole opened at the top of the negative pressure tube.

[0007] As a preferred embodiment of the blood filtration tubing connection mechanism of the present invention, the main component further includes an endofulum tube, the end of which is fixed with a connector, and the surface of the connector is rotatably connected with a sealing cap by a thread.

[0008] As a preferred embodiment of the blood filtration tubing connection mechanism of the present invention, the protective component further includes a cutting element disposed on the surface of the sleeve, including a fixing seat fixed to the surface of the sleeve, a pressing block sliding inside the fixing seat, a limit hook fixed to the inner wall of the sleeve, and a slot formed inside the pressing block.

[0009] As a preferred embodiment of the blood filtration tubing connection mechanism of the present invention, the protective component further includes a detection element disposed on one side of the negative pressure tube, including a support tube fixed to one side of the negative pressure tube, a positioning rod sliding inside the support tube, an inclined surface and a positioning groove being provided at the end of the positioning rod, a push ring being fixed on the surface of the positioning rod, and a second spring being fixed on one side of the push ring.

[0010] In a preferred embodiment of the blood filtration tubing connection mechanism of the present invention, the detection element further includes a support sleeve fixed to the surface of the protective sleeve, a slide rod sliding inside the support sleeve, a positioning rod sliding inside the slide rod, a pull ring fixed to the surface of the positioning rod, the pull ring sliding inside the slide rod, and a third spring fixed to one side of the pull ring.

[0011] In a preferred embodiment of the blood filtration tubing connection mechanism of the present invention, a connecting rod is fixed to the top of the sliding rod, a limiting block is fixed to the end of the connecting rod, the limiting block is located inside the support base, a fixing groove is provided inside the rotating rod, and the limiting block can be inserted into the fixing groove.

[0012] As a preferred embodiment of the blood filtration tubing connection mechanism of the present invention, the protective component further includes a connector disposed within the sleeve, including a positioning block hinged within the sleeve, a fourth spring fixed to the inner wall of the positioning block, the other end of the fourth spring fixed to the inner wall of the sleeve, and a snap-fit ​​groove provided within the connector, wherein the positioning block can snap into the snap-fit ​​groove.

[0013] As a preferred embodiment of the blood filtration tubing connection mechanism of the present invention, the connector further includes a support shell fixed to one side of the protective sleeve, a positioning block sliding inside the support shell, an end of the positioning block being inserted into the connecting tube, a fifth spring fixed to the other end of the positioning block, a squeezing groove being formed on the positioning block, a squeezing block sliding inside the protective sleeve, the end of the squeezing block being inclined and located on one side of the squeezing groove, a sixth spring fixed to the surface of the connecting tube, and the other end of the sixth spring being fixed to the inner wall of the sleeve.

[0014] In a preferred embodiment of the blood filtration tubing connection mechanism of the present invention, the protective component further includes a reset member disposed on the surface of the sleeve, comprising a reset sleeve that slides on the surface of the sleeve, a connecting block fixed to the inner wall of the reset sleeve, the connecting block fixed to the surface of the connecting tube, a driving block fixed to the surface of the reset sleeve, a positioning tube fixed to the surface of the sleeve, a blocking rod sliding inside the positioning tube, the end of the blocking rod being located on one side of the pressing block, a blocking ring fixed to the surface of the blocking rod, a seventh spring fixed to one side of the blocking ring, the other end of the blocking rod being inserted into the reset sleeve, a locking block sliding inside the blocking rod, an eighth spring fixed to the inner wall of the locking block, and the other end of the eighth spring fixed to the inner wall of the blocking rod.

[0015] As a preferred embodiment of the blood filtration tubing connection mechanism of the present invention, the reset member further includes a compression ring that slides on the surface of the sleeve, the compression ring is fixed to the surface of the blocking ring, a compression strip is fixed to one side of the compression ring, a fixing shell is fixed to the surface of the sleeve, a reset plug slides inside the fixing shell, an insertion hole is opened on the surface of the support tube, and the reset plug is located on one side of the insertion hole.

[0016] The beneficial effects of this invention are: by setting up a protective component, the connecting pipe can be kept in a sealed state, which can prevent the connecting pipe from being contaminated before use; The telescopic tube and connector are designed so that the tube can extend out of the sleeve after being inserted into the connector, thus completing the connection with the connector. This minimizes the risk of contamination of the tube and eliminates the need for additional fixation by personnel. The tube can be automatically locked in place by the positioning block, improving the efficiency of the device. The cooperation between the reset component and the cut-off component can prevent the connection between the connecting tube and the connector from being accidentally disconnected. Only when the cut-off component cuts off the fluid in the hose can the reset component drive the connecting tube and the connector to separate, thereby improving the stability of the connection between the connecting tube and the connector. The cooperation between the reset component and the negative pressure tube allows the negative pressure tube to absorb the liquid inside the connecting tube at the moment the reset component drives the connecting tube to reset. This prevents the liquid inside the connecting tube from flowing out when the connecting tube compresses the telescopic tube, thus preventing residual liquid from dripping from the opening of the connecting tube. The combination of the detection element and the negative pressure tube ensures that the sealing cover can only be opened when the negative pressure tube is in a usable state, thereby ensuring the effectiveness of the device's operation. When the negative pressure tube is in operation, the detection component can limit the sealing cover, so that the sealing cover cannot be opened after automatically sealing the end of the sleeve. This prevents the staff from forgetting to seal the end of the sleeve and also prevents the risk of infection caused by the sealing cover being accidentally opened. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a structural diagram of the blood filtration tubing connection mechanism.

[0018] Figure 2 This is a cross-sectional view of the connector of the blood filtration tubing connection mechanism.

[0019] Figure 3 This is a cross-sectional view of the connecting pipe of the blood filtration tubing connection mechanism.

[0020] Figure 4 For blood filtration tubing connection mechanism Figure 3 Enlarged view of the local structure at point D.

[0021] Figure 5 For blood filtration tubing connection mechanism Figure 3 Enlarged view of the local structure at point E in the middle.

[0022] Figure 6 For blood filtration tubing connection mechanism Figure 3 Enlarged view of the local structure at point F in the middle.

[0023] Figure 7 This is a structural diagram of the negative pressure tube of the blood filtration tubing connection mechanism.

[0024] Figure 8 For blood filtration tubing connection mechanism Figure 7 Enlarged view of the local structure at point G in the middle.

[0025] Figure 9 This is a cross-sectional view of the connecting pipe of the blood filtration tubing connection mechanism from another perspective.

[0026] Figure 10 For blood filtration tubing connection mechanism Figure 9 Enlarged view of the local structure at point H.

[0027] Figure 11 For blood filtration tubing connection mechanism Figure 9 Enlarged view of the local structure at point I in the middle.

[0028] Figure 12 This is a diagram of the sleeve structure for the blood filtration tubing connection mechanism.

[0029] Figure 13 For blood filtration tubing connection mechanism Figure 12 Sectional view of the structure at point AA.

[0030] Figure 14 For blood filtration tubing connection mechanism Figure 12 Cross-sectional view of the structure at point BB.

[0031] Figure 15 For blood filtration tubing connection mechanism Figure 12 Cross-sectional view of the structure at the CC section.

[0032] In the diagram: Main component 100; Sleeve 101; Connecting tube 102; Infusion tube 103; Protective component 200; Protective sleeve 201a; Support base 201b; Rotating rod 201c; Sealing cap 201d; Telescopic tube 201e; Flexible tube 201f; Support ring 201g; Catheter 201m; Sealing plug 201h; Piston 201i; Negative pressure tube 201j; First spring 201k; Positioning ring 201l; Through hole 201j-1; Fistula tube 104; Connector 105; Sealing cap 106; Cut-off piece 202; Fixing base 202a; Pressing block 202b; Limiting hook 202c; Slot 202b-1; Detection piece 203; Support tube 203a; Positioning rod 203b; Inclined surface 203b-1; Positioning groove 203b-2; Push ring 203c; Second spring 201k; 3d; Support sleeve 203e; Slide rod 203f; Pull ring 203g; Third spring 203h; Connecting rod 203i; Limiting block 203j; Fixing groove 201c-1; Connector 204; Positioning block 204a; Fourth spring 204b; Snap-fit ​​groove 105-1; Support shell 204c; Positioning insert 204d; Fifth spring 204e; Extrusion groove 204d-1; Extrusion block 204f; Sixth spring 204g; Reset piece 205; Reset sleeve 205a; Connecting block 205b; Drive block 205c; Positioning tube 205d; Stop rod 205e; Blocking ring 205f; Seventh spring 205g; Snap-fit ​​block 205h; Eighth spring 205i; Extrusion ring 205j; Extrusion strip 205k; Fixing shell 205l; Reset insert 205m; Insertion hole 203a-1. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0036] Example 1, referring to Figures 1-15This is the first embodiment of the present invention. This embodiment provides a blood filtration tubing connection mechanism. The blood filtration tubing connection mechanism includes a main component 100, including a sleeve 101, a connecting tube 102, and an infusion tube 103. The connecting tube 102 slides inside the sleeve 101, so that the sleeve 101 can protect the connecting tube 102 and prevent the connecting tube 102 from being contaminated. The infusion tube 103 is fixed to the end of the sleeve 101 and can communicate with the connecting tube 102, so that the liquid in the infusion tube 103 can enter the connecting tube 102.

[0037] The protective assembly 200 is disposed on the sleeve 101 and includes a protective sleeve 201a fixed to the surface of the sleeve 101. A support seat 201b is fixed to the surface of the protective sleeve 201a. A rotating rod 201c is hinged inside the support seat 201b. A sealing cap 201d is fixed to the other end of the rotating rod 201c. A torsion spring is disposed between the rotating rod 201c and the support seat 201b. The torsion spring makes the sealing cap 201d fit tightly against the end of the sleeve 101.

[0038] A telescopic tube 201e is fixed to one end of the connecting pipe 102. The telescopic tube 201e is similar to a corrugated pipe and can extend and retract. A flexible hose 201f is fixed to the other end of the telescopic tube 201e. The flexible hose 201f has strong toughness and can be squeezed, thus causing the flow in the flexible hose 201f to stop. Two support rings 201g are fixed to the surface of the flexible hose 201f, located at both ends of the flexible hose 201f, to provide stable support for the flexible hose 201f. The support rings 201g are fixed to the inner wall of the sleeve 101. A conduit 201m is fixed to the surface of the flexible hose 201f. A sealing plug 201h is inserted into the conduit 201m, thereby sealing the conduit 201f. A 1m sealing is provided. A piston 201i is fixed to the top of the sealing plug 201h. A negative pressure tube 201j is fixed to the surface of the sleeve 101. The piston 201i slides inside the negative pressure tube 201j. A first spring 201k is fixed to the bottom of the piston 201i. The first spring 201k is in a compressed state. A positioning ring 201l is fixed to the inner wall of the negative pressure tube 201j. The positioning ring 201l is used to limit the position of the piston 201i. A through hole 201j-1 is opened at the top of the negative pressure tube 201j, so that when the first spring 201k pushes the piston 201i, excess air in the negative pressure tube 201j can be discharged from the through hole 201j-1.

[0039] Specifically, the main component 100 also includes an endofuctosis 104, with a connector 105 fixed to the end of the endofuctosis 104. The endofuctosis 104 is used to connect to the venous end of the human body, and a one-way valve is provided in the endofuctosis 104 so that fluid can only flow from the connector 105 to the endofuctosis 104. The connector 105 is used to connect to the connecting tube 102. The output of the connecting tube 102 is blood filtered by the dialysis machine and other treatment fluids. A sealing cap 106 is connected to the surface of the connector 105 by a threaded rotation. The sealing cap 106 is used to seal the connector 105 to prevent dust, bacteria and other contaminants from entering the connector 105.

[0040] Example 2, refer to Figures 1-15 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0041] Specifically, the protective component 200 also includes a cut-off element 202 disposed on the surface of the sleeve 101, including a fixing seat 202a fixed to the surface of the sleeve 101, a pressing block 202b slidingly disposed within the fixing seat 202a, the pressing block 202b being located on one side of the hose 201f, a limit hook 202c fixed to the inner wall of the sleeve 101, a slot 202b-1 formed within the pressing block 202b, and a protrusion fixed to the inner wall of the slot 202b-1, by pushing the pressing block 202b... The pressing block 202b can squeeze the hose 201f, causing the flow of the hose 201f to be interrupted. During this process, the limiting hook 202c will be inserted into the slot 202b-1, so that the limiting hook 202c is engaged with the protrusion side of the inner wall of the slot 202b-1, thereby limiting the pressing block 202b. This prevents the two pressing blocks 202b from moving away from each other under the reset elastic force of the hose 201f itself, thus enabling stable cutting off of the liquid in the hose 201f.

[0042] Specifically, the protective component 200 also includes a detection element 203, disposed on one side of the negative pressure pipe 201j, including a support pipe 203a fixed to one side of the negative pressure pipe 201j, a positioning rod 203b sliding inside the support pipe 203a, and a limit strip provided between the support pipe 203a and the positioning rod 203b to prevent the positioning rod 203b from rotating inside the support pipe 203a. The end of the positioning rod 203b has an inclined surface 203b-1 and a positioning groove 203b-2. The piston 201i can be pressed through the through hole 201j-1 of the negative pressure pipe 201j, causing the piston 201i to squeeze the inclined surface 203b-1, thereby allowing the piston to... The piston 201i can fall to the top of the positioning ring 201l. At this time, the positioning groove 203b-2 can be engaged with the surface of the piston 201i, thereby limiting the piston 201i and preventing it from moving upward under the push of the first spring 201k. A push ring 203c is fixed on the surface of the positioning rod 203b. A second spring 203d is fixed on one side of the push ring 203c. The second spring 203d is in a compressed state. By pushing the push ring 203c through the second spring 203d, the push ring 203c can drive the positioning rod 203b to move towards the piston 201i, so that the positioning groove 203b-2 can be engaged with the surface of the piston 201i.

[0043] Specifically, the testing component 203 also includes a support sleeve 203e fixed to the surface of the protective sleeve 201a. A slide rod 203f slides inside the support sleeve 203e, and a positioning rod 203b slides inside the slide rod 203f. A pull ring 203g is fixed to the surface of the positioning rod 203b and slides inside the slide rod 203f. A third spring 203h is fixed to one side of the pull ring 203g. The third spring 203h is in a compressed state. When the positioning rod 203b pulls the pull ring 203g, the pull ring 203g can drive the slide rod 203f to move, thereby moving the slide rod 203f away from the support seat 201b.

[0044] Specifically, a connecting rod 203i is fixed to the top of the sliding rod 203f, and a limiting block 203j is fixed to the end of the connecting rod 203i. The limiting block 203j is located inside the support base 201b, and a fixing groove 201c-1 is opened in the rotating rod 201c. The limiting block 203j can be inserted into the fixing groove 201c-1.

[0045] When the slide bar 203f begins to move away from the support base 201b, the slide bar 203f can drive the connecting rod 203i to move, so that the connecting rod 203i drives the limiting block 203j to insert into the fixing groove 201c-1, thereby positioning the rotating rod 201c, so that the sealing cover 201d cannot be opened.

[0046] Specifically, the protective component 200 also includes a connector 204 disposed within the sleeve 101, including a positioning block 204a hinged within the sleeve 101. The positioning block 204a is located at the end of the connecting pipe 102. A fourth spring 204b is fixed to the inner wall of the positioning block 204a, and the other end of the fourth spring 204b is fixed to the inner wall of the sleeve 101. The four springs 204b are in a compressed state. A snap-fit ​​groove 105-1 is provided in the connector 105. The positioning block 204a can snap into the snap-fit ​​groove 105-1. When the connecting pipe 102 and the connector 105 are connected, the positioning block 204a can move into the snap-fit ​​groove 105-1. At this time, the positioning block 204a is squeezed by the end of the connecting pipe 102, so that the positioning block 204a is squeezed into the snap-fit ​​groove 105-1, thereby preventing the sleeve 101 from being pulled out of the connector 105.

[0047] Specifically, the connector 204 also includes a support shell 204c fixed to one side of the protective sleeve 201a. A positioning block 204d slides inside the support shell 204c. One end of the positioning block 204d is inserted into the connecting tube 102. A fifth spring 204e is fixed to the other end of the positioning block 204d. The fifth spring 204e is in a compressed state and is used to push the positioning block 204d. A pressing groove 204d-1 is provided on the positioning block 204d. A pressing block 204f slides inside the protective sleeve 201a. The end of the pressing block 204f is inclined and located on one side of the pressing groove 204d-1. When the sleeve 101 is inserted into the connector 1... When the pressure is within 05, the connector 105 can press the extrusion block 204f, so that the end of the extrusion block 204f presses the extrusion groove 204d-1 at an angle, thereby causing the positioning insert 204d to move downward, thereby causing the positioning insert 204d to move out of the connecting tube 102, releasing the limitation on the connecting tube 102. A sixth spring 204g is fixed on the surface of the connecting tube 102, and the other end of the sixth spring 204g is fixed to the inner wall of the sleeve 101. The sixth spring 204g is in a compressed state. Through the elastic force of the sixth spring 204g, the end of the connecting tube 102 can be pushed out of the sleeve 101, thereby connecting the connecting tube 102 and the connector 105.

[0048] Example 3, referring to Figures 1-15 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0049] Specifically, the protective assembly 200 also includes a reset component 205 disposed on the surface of the sleeve 101, including a reset sleeve 205a that slides on the surface of the sleeve 101, a connecting block 205b fixed to the inner wall of the reset sleeve 205a, the connecting block 205b fixed to the surface of the connecting tube 102, and a driving block 205c fixed to the surface of the reset sleeve 205a. Pulling the driving block 205c can drive the reset sleeve 205a to move, thereby causing the reset sleeve 205a to drive the connecting tube 102 to reset and move, thus enabling the connection... The tube 102 and connector 105 are separated. A positioning tube 205d is fixed to the surface of the sleeve 101. A stop rod 205e slides inside the positioning tube 205d. The end of the stop rod 205e is located on one side of the pressing block 202b. Due to the obstruction of the pressing block 202b, the stop rod 205e cannot move towards the pressing block 202b. A blocking ring 205f is fixed to the surface of the stop rod 205e. A seventh spring 205g is fixed to one side of the blocking ring 205f. The seventh spring 205g is in a compressed state. At this time, the blocking ring... 205f is located at one end inside the positioning tube 205d, thereby positioning the stop rod 205e. The other end of the stop rod 205e is inserted into the reset sleeve 205a. A locking block 205h slides inside the stop rod 205e. An eighth spring 205i is fixed to the inner wall of the locking block 205h. The other end of the eighth spring 205i is fixed to the inner wall of the stop rod 205e. The eighth spring 205i is in a compressed state, used to push the locking block 205h. When the connecting tube 102 and the connector 105 are connected, the reset sleeve 205a moves accordingly. The connecting tube 102 moves synchronously, causing the locking block 205h to just move out of the reset sleeve 205a. Under the push of the eighth spring 205i, the locking block 205h is locked onto one side of the reset sleeve 205a, thereby preventing the reset sleeve 205a from resetting and thus preventing the connecting tube 102 and the connector 105 from accidentally disconnecting. Only after the pressing block 202b cuts off the flow to the hose 201f can the reset sleeve 205a reset and move, thereby separating the connecting tube 102 and the connector 105.

[0050] Specifically, the reset component 205 also includes a compression ring 205j that slides on the surface of the sleeve 101. The compression ring 205j is fixed to the surface of the blocking ring 205f. A compression strip 205k is fixed to one side of the compression ring 205j. When the reset sleeve 205a moves to reset, the blocking ring 205f can drive the compression ring 205j to move, thereby causing the compression ring 205j to drive the compression strip 205k to move. A fixing shell 205l is fixed to the surface of the sleeve 101. A reset insert 205m slides inside the fixing shell 205l. An insertion hole 203a-1 is opened on the surface of the support tube 203a. The reset insert 205m Located on one side of the insertion hole 203a-1, the extrusion bar 205k extrudes the insertion block 205m, causing the insertion block 205m to be inserted into the insertion hole 203a-1. This causes the insertion block 205m to extrude the push ring 203c, which in turn causes the push ring 203c to move the positioning rod 203b away from the piston 201i. This releases the positioning groove 203b-2 from limiting the piston 201i, allowing the piston 201i to move upward under the push of the first spring 201k. This draws excess liquid from the connecting pipe 102 into the negative pressure pipe 201j, preventing residual liquid from dripping from the end of the connecting pipe 102.

[0051] In use, when it is necessary to connect the connecting tube 102 and the connector 105, first open the sealing cap 201d. Then insert the sleeve 101 into the connector 105, which allows the connector 105 to press the pressing block 204f. This causes the end of the pressing block 204f to press the pressing groove 204d-1 at an angle, thereby causing the positioning block 204d to move downward. This allows the positioning block 204d to move out of the connecting tube 102, releasing the restriction on the connecting tube 102. Through the elastic force of the sixth spring 204g, the end of the connecting tube 102 can be pushed out of the sleeve 101, thus connecting the connecting tube 102 and the connector 105. When the connecting tube 102 and the connector 105 are connected, the end of the connecting tube 102 can press the positioning block 204a, causing the positioning block 204a to be pressed into the snap-fit ​​groove 105-1, thus preventing the sleeve 101 from being pulled out of the connector 105.

[0052] When dialysis is completed and the connecting tube 102 and connector 105 need to be disconnected, first press the two pressing blocks 202b. This will cause the pressing blocks 202b to squeeze the tubing 201f, thus cutting off the flow in the tubing 201f. During this process, the limiting hook 202c will be inserted into the slot 202b-1, so that the limiting hook 202c is engaged with the protrusion on the inner wall of the slot 202b-1, thereby limiting the pressing blocks 202b. This prevents the two pressing blocks 202b from moving away from each other under the restoring elasticity of the tubing 201f itself, thus allowing for a stable cut-off of the liquid in the tubing 201f.

[0053] At this point, pulling the reset sleeve 205a again will cause the blocking ring 205f to move the squeezing ring 205j, which in turn causes the squeezing ring 205j to move the squeezing strip 205k. The squeezing strip 205k then squeezes the insert block 205m, causing the insert block 205m to be inserted into the insertion hole 203a-1. This causes the insert block 205m to squeeze the push ring 203c, which in turn causes the push ring 203c to move the positioning rod 203b away from the piston 201i. This releases the positioning groove 203b-2 from limiting the piston 201i, allowing the piston 201i to move upward under the push of the first spring 201k. This draws excess liquid from the connecting pipe 102 into the negative pressure pipe 201j, preventing residual liquid from dripping from the end of the connecting pipe 102.

[0054] As the extrusion bar 205k continues to move, the insertion block 205m will fall back into the groove on the surface of the extrusion bar 205k. This causes the push ring 203c, under the push of the second spring 203d, to move the positioning rod 203b towards the negative pressure pipe 201j. At the same time, the slide rod 203f will be driven by the positioning rod 203b and the pull ring 203g, tending to move away from the protective sleeve 201a. When the connecting pipe 102 is completely retracted into the sleeve 101, the sealing cover 201 at this time... Under the restoring force of the torsion spring between the rotating rod 201c and the support seat 201b, the end of the sleeve 101 is resealed. At the same time, the rotating rod 201c drives the fixing groove 201c-1 to move to the side of the limiting block 203j. At this time, under the pull of the connecting rod 203i, the limiting block 203j is inserted into the fixing groove 201c-1, thereby limiting the rotating rod 201c, thus limiting the sealing cover 201d, thereby preventing the sealing cover 201d from being opened.

[0055] As the reset sleeve 205a moves to reset, the positioning block 204d on one side of the reset sleeve 205a is re-inserted into the connecting tube 102 under the reset force of the fifth spring 204e, thereby positioning the connecting tube 102 so that the connecting tube 102 will not pop out of the sleeve 101.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A blood filtration tubing connection mechanism, characterized in that: include, The main component (100) includes a cannula (101), a connecting tube (102), and an infusion tube (103), wherein the connecting tube (102) slides inside the cannula (101), and the infusion tube (103) is fixed to the end of the cannula (101); A protective assembly (200), disposed on the sleeve (101), includes a protective sleeve (201a) fixed to the surface of the sleeve (101), a support base (201b) fixed to the surface of the protective sleeve (201a), a rotating rod (201c) hinged inside the support base (201b), a sealing cap (201d) fixed to the other end of the rotating rod (201c), a telescopic tube (201e) fixed to the end of the connecting pipe (102), a flexible hose (201f) fixed to the other end of the telescopic tube (201e), a support ring (201g) fixed to the surface of the flexible hose (201f), and the support ring (201g)... A conduit (201m) is fixed to the inner wall of the sleeve (101), and a sealing plug (201h) is inserted into the conduit (201m). A piston (201i) is fixed to the top of the sealing plug (201h). A negative pressure tube (201j) is fixed to the surface of the sleeve (101). The piston (201i) slides inside the negative pressure tube (201j). A first spring (201k) is fixed to the bottom of the piston (201i). A positioning ring (201l) is fixed to the inner wall of the negative pressure tube (201j). A through hole (201j-1) is opened at the top of the negative pressure tube (201j). The protective component (200) further includes a cut-off piece (202) disposed on the surface of the sleeve (101), including a fixing seat (202a) fixed to the surface of the sleeve (101), a pressing block (202b) sliding inside the fixing seat (202a), a limit hook (202c) fixed to the inner wall of the sleeve (101), and a slot (202b-1) opened inside the pressing block (202b); The protective assembly (200) further includes a detection element (203), disposed on one side of the negative pressure pipe (201j), including a support pipe (203a) fixed to one side of the negative pressure pipe (201j) and a support sleeve (203e) fixed to the surface of the protective sleeve (201a). A positioning rod (203b) slides inside the support pipe (203a). The end of the positioning rod (203b) is provided with an inclined surface (203b-1) and a positioning groove (203b-2). 3b) A push ring (203c) is fixed on the surface, a second spring (203d) is fixed on one side of the push ring (203c), a slide rod (203f) slides inside the support sleeve (203e), the positioning rod (203b) slides inside the slide rod (203f), a pull ring (203g) is fixed on the surface of the positioning rod (203b), the pull ring (203g) slides inside the slide rod (203f), and a third spring (203h) is fixed on one side of the pull ring (203g). The protective assembly (200) further includes a reset component (205) disposed on the surface of the sleeve (101), comprising a reset sleeve (205a) sliding on the surface of the sleeve (101) and a compression ring (205j) sliding on the surface of the sleeve (101). A connecting block (205b) is fixed to the inner wall of the reset sleeve (205a), and the connecting block (205b) is fixed to the surface of the connecting tube (102). A driving block (205c) is fixed to the surface of the reset sleeve (205a), and a positioning tube (205d) is fixed to the surface of the sleeve (101). A stop rod (205e) slides inside the positioning tube (205d), with the end of the stop rod (205e) located on one side of the pressing block (202b). A blocking ring (205f) is fixed to the surface of the stop rod (205e), and one side of the blocking ring (205f) is... A seventh spring (205g) is fixed, and the other end of the stop rod (205e) is inserted into the reset sleeve (205a). A locking block (205h) slides inside the stop rod (205e). An eighth spring (205i) is fixed to the inner wall of the locking block (205h). The other end of the eighth spring (205i) is fixed to the inner wall of the stop rod (205e). The compression ring (205j) is fixed to the surface of the blocking ring (205f). A compression strip (205k) is fixed to one side of the compression ring (205j). A fixing shell (205l) is fixed to the surface of the sleeve (101). A reset plug (205m) slides inside the fixing shell (205l). A plug hole (203a-1) is opened on the surface of the support tube (203a). The reset plug (205m) is located on one side of the plug hole (203a-1).

2. The blood filtration tubing connection mechanism as described in claim 1, characterized in that: The main component (100) also includes an endofulum (104), the end of which is fixed with a connector (105), and the surface of the connector (105) is connected to a sealing cap (106) by a threaded rotation.

3. The blood filtration tubing connection mechanism as described in claim 2, characterized in that: A connecting rod (203i) is fixed to the top of the sliding rod (203f), and a limiting block (203j) is fixed to the end of the connecting rod (203i). The limiting block (203j) is located in the support base (201b). A fixing groove (201c-1) is opened in the rotating rod (201c), and the limiting block (203j) can be inserted into the fixing groove (201c-1).

4. The blood filtration tubing connection mechanism as described in claim 3, characterized in that: The protective component (200) also includes a connector (204) disposed inside the sleeve (101), including a positioning block (204a) hinged inside the sleeve (101), a fourth spring (204b) fixed to the inner wall of the positioning block (204a), the other end of the fourth spring (204b) being fixed to the inner wall of the sleeve (101), and a snap-fit ​​groove (105-1) provided inside the connector (105), the positioning block (204a) being snap-fitted into the snap-fit ​​groove (105-1).

5. The blood filtration tubing connection mechanism as described in claim 4, characterized in that: The connector (204) also includes a support shell (204c) fixed to one side of the protective sleeve (201a). A positioning block (204d) slides inside the support shell (204c). The end of the positioning block (204d) is inserted into the connecting tube (102). A fifth spring (204e) is fixed to the other end of the positioning block (204d). A pressing groove (204d-1) is opened on the positioning block (204d). A pressing block (204f) slides inside the protective sleeve (201a). The end of the pressing block (204f) is inclined. The end of the pressing block (204f) is located on one side of the pressing groove (204d-1). A sixth spring (204g) is fixed to the surface of the connecting tube (102). The other end of the sixth spring (204g) is fixed to the inner wall of the sleeve (101).

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