Emergency disconnect self-locking connector for blood circuit

Abstract

The present application relates to the technical field of medical devices, in particular to a blood circuit emergency disengagement self-locking joint, comprising a first joint and a second joint, the inside of the first joint is provided with an unlocking part; one end of the first joint is sleeved with a first hose, the outside of the first hose is sleeved with a locking clamp, the locking clamp is used for clamping the first hose; the inside of the second joint is provided with a self-sealing assembly, the self-sealing assembly can seal the inside of the second joint, one end of the second joint is sleeved with a second hose, the first hose and the second hose are used for connecting a retention needle or a blood circuit; the first joint and the second joint can be coaxially inserted and matched, and the first joint and the second joint have a locking state and an unlocking state; when the locking clamp clamps the first hose, the first joint and the second joint are in the unlocking state, at this time, the first joint and the second joint can be separated. In this way, blood leakage can be avoided, and the work efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a self-locking connector for emergency disconnection of blood circuits. Background Technology

[0002] In currently used blood circuit products, the emergency release self-locking connector of the blood circuit is usually fixed by using a Luer connector locking method. For example, patent document CN116510131B discloses a syringe connector, one end of which is the inlet end, which is provided with a first Luer connector to connect to the syringe, and the other end is the outlet end, which is provided with a first external thread for connecting to an insulin needle.

[0003] Existing technologies typically require the use of Robert clamps to hold the tubing in the blood circuit, thus preventing leakage when the blood circuit needs to be shut off urgently. However, because the process requires both clamping the tubing and rotating the Luer connector simultaneously, it is cumbersome and affects the efficiency of emergency disconnection. Summary of the Invention

[0004] Therefore, it is necessary to provide a self-locking connector for emergency disconnection of the blood circuit, addressing the current technical problem that Luer connectors cannot quickly achieve separation.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A self-locking connector for emergency disengagement of a blood circuit includes a first connector and a second connector. The first connector has an unlocking component inside. One end of the first connector is fitted with a first flexible tube, and a locking clamp is fitted around the first flexible tube to clamp it, thereby sealing the first flexible tube. The second connector has a self-sealing assembly inside, which seals the interior of the second connector. One end of the second connector is fitted with a second flexible tube. Both the first and second flexible tubes are used to connect to an indwelling needle or a blood circuit. The first and second connectors can be coaxially inserted and have locked and unlocked states. When the first and second connectors are inserted into place, they are in the locked state, and the unlocking component can unlock the self-sealing assembly, thereby allowing internal communication between the first and second connectors. When the locking clamp clamps the first flexible tube, the first and second connectors are in the unlocked state, allowing them to separate.

[0007] Furthermore, a first locking ring is coaxially sleeved on the outside of the first hose. The first locking ring is used to press the first hose against the outer circumferential surface of the first connector. The first locking ring is provided with a slot. The locking clamp includes a locking body and a bending plate. The locking body is located outside the first locking ring. The bending plate is rotatably mounted on the locking body in a direction perpendicular to the axis of the first connector. The bending plate is provided with a locking platform. When the bending plate rotates until the locking platform on it engages with the slot, the bending plate presses and seals the first hose.

[0008] Furthermore, the first locking ring includes a first ring, a connecting plate, and a second ring. The connecting plate extends axially along the first connector. The first ring and the second ring are located at opposite ends of the connecting plate, with the first ring positioned away from the second connector relative to the second ring. The slot is disposed on the first ring. The locking body has a first end and a second end. The first end is positioned away from the second connector relative to the second end. The first end of the locking body can slide on the first ring, and the second end of the locking body can slide on the first flexible tube. The bending plate can rotate between the first ring and the second ring, thereby allowing the locking plate to engage with the slot.

[0009] Furthermore, both the slot and the platform extend in a direction perpendicular to the axis of the first connector, and both the slot and the platform are V-shaped with an acute angle between them.

[0010] Furthermore, the unlocking component is an unlocking rod, which extends radially along the first connector and is fixedly disposed on the inner wall of the first connector. The self-sealing assembly includes multiple elastic rubber strips distributed around the axis of the second connector. The multiple elastic rubber strips are jointly fixed to a sealing ball. The inner wall of the second connector has an opening. The elastic rubber strips have a tendency to cause the sealing ball to seal the opening. When the first connector and the second connector are coaxially inserted, the unlocking rod can push the sealing ball, causing the sealing ball to disengage from the opening, thereby unlocking the self-sealing assembly.

[0011] Furthermore, the end of the first connector away from the first hose has a plurality of arc-shaped spring pieces evenly distributed around its circumference. The inner circumferential surface of the arc-shaped spring pieces is provided with an annular groove. The outer circumferential surface of the second connector is provided with an annular protrusion. The second connector is also coaxially fitted with a second locking ring. The second locking ring is used to press the second hose against the outer circumferential surface of the second connector. When the first connector and the second connector are inserted into place, the arc-shaped spring pieces can be inserted between the second connector and the second locking ring, so that the annular protrusion can be locked into the annular groove. At the same time, the side of the second end of the locking body is engaged with the second locking ring to stop and lock the first connector and the second connector.

[0012] Furthermore, the side of the annular protrusion facing the first connector is a first outer conical surface, which is coaxially arranged with the second connector. The inner circumferential surface of the arc-shaped spring is provided with a first inner conical surface. The relative sliding of the first outer conical surface and the first inner conical surface causes the arc-shaped spring to expand radially along the first connector, thereby enabling the annular protrusion to be engaged in the annular groove.

[0013] Furthermore, the second locking ring has a first arc-shaped piece and a second arc-shaped piece at the end facing the first connector. Both the first and second arc-shaped pieces are semi-circular. The first arc-shaped piece has a first buckle, and the second arc-shaped piece has a second buckle. The first and second buckles have a snap-fit ​​state and a split state. When the first and second buckles are snap-fitted, both the first and second arc-shaped pieces are coaxial with the second locking ring. When the first and second buckles are split, the first and second arc-shaped pieces are far apart from each other.

[0014] Furthermore, the second locking ring has a second inner conical surface at one end facing the first connector, and the outer circumferential surface of the arc-shaped spring has a second outer conical surface. When the arc-shaped spring is inserted between the second connector and the second locking ring, the second outer conical surface and the second inner conical surface can slide relative to each other, thereby switching the first buckle and the second buckle from the snap-fit ​​state to the open state. When the first connector and the second connector are inserted into place, the side of the second end of the locking body and the first arc-shaped piece and the second arc-shaped piece are both blocked and engaged, thereby causing the first buckle and the second buckle to switch to the snap-fit ​​state, and thus locking the first connector and the second connector.

[0015] Furthermore, the first ring is provided with a stop plate, which is used to stop the first end of the locking body, and the second ring is used to stop the second end of the locking body. When the bending plate presses the first hose, the locking body can slide away from the second connector, so that the second end of the locking body is released from the stop engagement with the first arc-shaped piece and the second arc-shaped piece, thereby switching the first buckle and the second buckle to a separated state, and the first arc-shaped piece and the second arc-shaped piece can move away from each other; at the same time, the bending plate can push the second connector to move away from the first connector, thereby putting the first connector and the second connector in an unlocked state and realizing separation.

[0016] The beneficial effects of this invention are:

[0017] The blood circuit emergency disconnection self-locking connector provided by the present invention has the following characteristics: First, when the locking clamp clamps and seals the first tubing, the first connector and the second connector are in an unlocked state. At this time, the first connector and the second connector can be separated. Only the locking clamp and the second connector need to be operated, which is simple and can improve the efficiency of emergency disconnection. Moreover, since the second connector can achieve self-sealing of the second tubing, both the first tubing and the second tubing are sealed by themselves, which can prevent blood leakage.

[0018] Secondly, when the first connector and the second connector are inserted into place, the blockage on the second hose can be automatically released, so that the internal parts of the first connector and the second connector can be automatically connected, making it convenient to use.

[0019] Third, the first and second connectors can automatically lock when they are inserted into place. When the locking clamp clamps and seals the first hose, the first and second connectors can automatically unlock, ensuring a stable connection without requiring any additional operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the first usage state of the emergency disconnection self-locking connector for the blood circuit according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram showing the state when the first and second connectors are separated.

[0022] Figure 3 This is a schematic diagram of the second usage state of the emergency disconnection self-locking connector for the blood circuit according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of a blood circuit emergency disconnection self-locking connector provided in an embodiment of the present invention;

[0024] Figure 5 A top view schematic diagram of an emergency disconnection self-locking connector for a blood circuit according to an embodiment of the present invention;

[0025] Figure 6 for Figure 5 Schematic diagram of the AA section;

[0026] Figure 7 for Figure 6 Enlarged view of the structure at point B in the middle;

[0027] Figure 8 This is a schematic diagram of the first and second connectors of the emergency disconnection self-locking connector for the blood circuit provided in an embodiment of the present invention when they are not connected.

[0028] Figure 9 This is a schematic diagram of the structure of the first connector in the emergency disconnection self-locking connector of the blood circuit according to an embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure of the second connector in the emergency disconnection self-locking connector of the blood circuit provided in an embodiment of the present invention.

[0030] in:

[0031] 100. Arterial indwelling needle; 200. Arterial side blood circulation circuit; 300. Venous indwelling needle; 400. Venous side blood circulation circuit; 500. Blood circuit emergency release self-locking connector; 510. First tubing; 520. First connector; 521. Unlocking lever; 522. Arc-shaped spring; 5221. First inner conical surface; 5222. Second outer conical surface; 530. First locking ring; 531. First ring; 532. Second ring; 533. Locking groove; 5 34. Stop plate; 540. Locking body; 541. Locking platform; 542. Bending part; 543. Bending plate; 544. Bending point; 550. Second hose; 560. Second connector; 561. Pressure end; 562. Rubber ring; 563. Sealing ball; 564. Elastic rubber strip; 565. Annular protrusion; 5651. First outer conical surface; 570. Second locking ring; 571. First arc-shaped piece; 572. Second arc-shaped piece; 573. Second inner conical surface. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0033] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They 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 limiting the invention.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] like Figures 1 to 10 As shown, an embodiment of the present invention provides a self-locking connector 500 for emergency disconnection of a blood circuit (hereinafter referred to as a self-locking connector), comprising a first connector 520 and a second connector 560. The first connector 520 has an unlocking component inside. One end of the first connector 520 is fitted with a first flexible tube 510, and a locking clip is fitted around the first flexible tube 510 to clamp it, thereby sealing the first flexible tube 510. The second connector 560 has a self-sealing component inside, which seals the interior of the second connector 560. One end of the second connector 560 is fitted with a second flexible tube 550. Both the first flexible tube 510 and the second flexible tube 550 are used for... Connects to an indwelling needle or blood circuit; the first connector 520 and the second connector 560 can be coaxially inserted and engaged, and the first connector 520 and the second connector 560 have a locked state and an unlocked state; when the first connector 520 and the second connector 560 are inserted into place, the first connector 520 and the second connector 560 are in the locked state, at this time the first connector 520 and the second connector 560 are locked, and the unlocking member can unlock the self-sealing component, thereby making the internal parts of the first connector 520 and the second connector 560 connected; when the locking clamp clamps the first tubing 510, the first connector 520 and the second connector 560 are in the unlocked state, at this time the first connector 520 and the second connector 560 can be separated.

[0036] Specifically, in this embodiment, the second connector 560 can be inserted into the first connector 520, and a rubber ring 562 is embedded on the outer peripheral surface of the second connector 560. The rubber ring 562 enables the first connector 520 and the second connector 560 to be inserted and fitted together to achieve a seal and prevent blood leakage.

[0037] When the locking clamp clamps and seals the first hose 510, the first connector 520 and the second connector 560 are unlocked. At this time, the first connector 520 and the second connector 560 can be separated. This simplifies operation by requiring only the operation of the locking clamp and pulling the second connector 560, improving work efficiency. Furthermore, because the second connector 560 can self-seal the second hose 550, both the first hose 510 and the second hose 550 are effectively sealed, preventing blood leakage.

[0038] When the first connector 520 and the second connector 560 are inserted into place, the blockage on the second hose 550 can be automatically released, so that the interiors of the first connector 520 and the second connector 560 can be automatically connected, making it convenient to use.

[0039] Furthermore, a first locking ring 530 is coaxially sleeved on the outside of the first hose 510. The first locking ring 530 is used to press the first hose 510 against the outer circumferential surface of the first connector 520. The first locking ring 530 is provided with a slot 533. The locking clamp includes a locking body 540 and a bending plate 543. The locking body 540 is located outside the first locking ring 530. The bending plate 543 is rotatably mounted on the locking body 540. The bending plate 543 is provided with a locking platform 541. When the bending plate 543 rotates until the locking platform 541 on it is engaged in the slot 533, the bending plate 543 presses and seals the first hose 510.

[0040] Specifically, the bending plate 543 is an elastic sheet capable of bending and deformation. The bending plate 543 has a V-shaped bending portion 542, and the locking platform 541 is disposed on the bending portion 542. The end of the bending plate 543 away from the second connector 560 is bent in the opposite direction, thereby strengthening the structure. In this way, the locking clamp, through the rotation of the bending plate 543, causes the locking platform 541 to engage with the locking groove 533, quickly completing the compression and sealing of the first flexible tube 510. This structure is convenient to operate, allowing medical personnel to quickly perform operations in emergency situations.

[0041] Further, the first locking ring 530 includes a first ring 531, a connecting plate, and a second ring 532. The connecting plate extends axially along the first connector 520. The first ring 531 and the second ring 532 are located at opposite ends of the connecting plate, with the first ring 531 positioned away from the second connector 560 relative to the second ring 532. The slot 533 is disposed on the first ring 531. The locking body 540 has a first end and a second end. The first end is positioned away from the second connector 560 relative to the second end. The first end of the locking body 540 can slide on the first ring 531, and the second end of the locking body 540 can slide on the first hose 510. The bending plate 543 can rotate between the first ring 531 and the second ring 532, thereby allowing the locking platform 541 to engage with the slot 533.

[0042] The first ring 531, the connecting plate, and the second ring 532 form a locking ring. The bending plate 543 can rotate between the first ring 531 and the second ring 532, so that the locking platform 541 on the bending plate 543 can be smoothly locked into the locking groove 533.

[0043] Furthermore, both the slot 533 and the mounting plate 541 extend in a direction perpendicular to the axis of the first connector 520. Both the slot 533 and the mounting plate 541 are V-shaped, with an acute angle between them. The included angle of the V-shape is 60° to 80°. Because the bending plate 543 itself has an elastic restoring force, this design prevents the mounting plate 541 on the bending plate 543 from automatically disengaging from the slot 533 of the first locking ring 530.

[0044] Furthermore, the unlocking component is an unlocking rod 521, which extends radially along the first connector 520 and is fixedly disposed on the inner wall of the first connector 520. The self-sealing assembly includes multiple elastic rubber strips 564 distributed around the axis of the second connector 560. These multiple elastic rubber strips 564 are collectively fixed to a sealing ball 563. The inner wall of the second connector 560 has an opening, and the elastic rubber strips 564 tend to cause the sealing ball 563 to seal the opening. When the first connector 520 and the second connector 560 are coaxially inserted, the unlocking rod 521 can push the sealing ball 563, causing the sealing ball 563 to disengage from the opening, thereby unlocking the self-sealing assembly. This eliminates the need for additional manual sealing operations, reduces human error, and lowers the risk of blood leakage.

[0045] Furthermore, the end of the first connector 520 away from the first hose 510 is provided with a plurality of arc-shaped spring pieces 522 evenly distributed around its circumference. The inner circumferential surface of the arc-shaped spring pieces 522 is provided with an annular groove. The outer circumferential surface of the second connector 560 is provided with an annular protrusion 565. The second connector 560 is also coaxially sleeved with a second locking ring 570. The second locking ring 570 is used to press the second hose 550 against the outer circumferential surface of the second connector 560. When the first connector 520 and the second connector 560 are inserted into place, the arc-shaped spring pieces 522 can be inserted between the second connector 560 and the second locking ring 570, so that the annular protrusion 565 can be engaged in the annular groove. At the same time, the side of the second end of the locking body 540 is engaged with the second locking ring 570 to stop and lock the first connector 520 and the second connector 560. In this way, the arc-shaped spring piece 522 is inserted between the second connector 560 and the second locking ring 570, so that the annular protrusion 565 is engaged in the ring groove. At the same time, the side of the second end of the locking body 540 is engaged with the second locking ring 570 to form a double lock, which prevents the first connector 520 and the second connector 560 from loosening under slight external force and ensures the locking effect.

[0046] Furthermore, the side of the annular protrusion 565 facing the first connector 520 is a first outer conical surface 5651. The first outer conical surface 5651 is coaxially arranged with the second connector 560. The inner circumferential surface of the arc-shaped spring piece 522 is provided with a first inner conical surface 5221. The relative sliding of the first outer conical surface 5651 and the first inner conical surface 5221 causes the arc-shaped spring piece 522 to expand radially along the first connector 520, thereby allowing the annular protrusion 565 to be engaged in the annular groove. In this way, the cooperation between the first outer conical surface 5651 and the first inner conical surface 5221 can reduce the difficulty of connecting the first connector 520 and the second connector 560, making the connection process easier and smoother.

[0047] Furthermore, the second locking ring 570 has a first arc-shaped piece 571 and a second arc-shaped piece 572 at the end facing the first connector 520. Both the first arc-shaped piece 571 and the second arc-shaped piece 572 are semi-circular. The first arc-shaped piece 571 has a first buckle, and the second arc-shaped piece 572 has a second buckle. The first buckle and the second buckle have a snap-fit ​​state and a split state. When the first buckle and the second buckle are snap-fitted, both the first arc-shaped piece 571 and the second arc-shaped piece 572 are coaxial with the second locking ring 570. When the first buckle and the second buckle are split, the first arc-shaped piece 571 and the second arc-shaped piece 572 are separated from each other. In this way, when the first buckle and the second buckle are split, it is easy for the arc-shaped spring piece 522 to disengage from the second connector 560 and the second locking ring 570.

[0048] The first and second latches are hooks that can cooperate with each other, thereby achieving the snap-fit ​​between the first and second latches.

[0049] Furthermore, the second locking ring 570 has a second inner conical surface 573 at one end facing the first connector 520, and the outer circumferential surface of the arc-shaped spring piece 522 has a second outer conical surface 5222. When the arc-shaped spring piece 522 is inserted between the second connector 560 and the second locking ring 570, the second outer conical surface 5222 and the second inner conical surface 573 can slide relative to each other, thereby switching the first buckle and the second buckle from a snap-fit ​​state to a separate state, which facilitates the smooth insertion of the arc-shaped spring piece 522. When the first connector 520 and the second connector 560 are inserted into place, the side of the second end of the locking body 540 is engaged with both the first arc-shaped piece 571 and the second arc-shaped piece 572, thereby causing the first buckle and the second buckle to switch to a snap-fit ​​state, and thus locking the first connector 520 and the second connector 560, preventing the arc-shaped spring piece 522 from disengaging.

[0050] Furthermore, the first ring 531 is provided with a stop plate 534, which is used to stop the first end of the locking body 540. The second ring 532 is used to stop the second end of the locking body 540. When the bending plate 543 presses the first hose 510, the locking body 540 can slide away from the second connector 560, so that the second end of the locking body 540 is released from the stop engagement with the first arc-shaped piece 571 and the second arc-shaped piece 572, thereby switching the first buckle and the second buckle to a separated state, and the first arc-shaped piece 571 and the second arc-shaped piece 572 can move away from each other; at the same time, the bending plate 543 can push the second connector 560 to move away from the first connector 520, thereby making the first connector 520 and the second connector 560 in an unlocked state and achieving separation. In this way, through the sliding of the locking body 540, the first arc-shaped piece 571 and the second arc-shaped piece 572 can move away from each other, and thus the first connector 520 and the second connector 560 can be easily separated.

[0051] like Figure 6 and Figure 8 As shown, the end of the second connector 560 closest to the first hose 510 is the pressure end 561. When the bending plate 543 presses the first hose 510, the bending plate 543 can simultaneously squeeze the pressure end 561 of the second connector 560, so that a bending point 544 can be formed on the bending plate 543, thereby pushing the second connector 560 to move away from the first connector 520.

[0052] Based on the above embodiments, the usage principle and working process of the embodiments of the present invention are as follows:

[0053] like Figure 1 As shown, both self-locking connectors are in their first operational state. One self-locking connector is used to connect the arterial indwelling needle 100 and the arterial side blood circulation circuit 200, and the other self-locking connector is used to connect the venous indwelling needle 300 and the venous side blood circulation circuit 400. Figure 3 As shown, the two self-locking connectors are in the second use state. One self-locking connector is used to connect the arterial indwelling needle 100 and the venous indwelling needle 300, and the other self-locking connector is used to connect the arterial side blood circulation circuit 200 and the venous side blood circulation circuit 400.

[0054] In the initial state, the first connector 520 and the second connector 560 are separated, the bending plate 543 of the first locking ring 530 does not press the first hose 510, and the first hose 510 remains unobstructed; the self-sealing assembly of the second connector 560 seals the interior of the second connector 560, and the second hose 550 is closed. At this time, the first arc-shaped piece 571 and the second arc-shaped piece 572 are engaged with each other by the first snap and the second snap.

[0055] Then, as needed, the first tubing 510 of the first connector 520 and the second tubing 550 of the second connector 560 are connected to the indwelling needle or the blood circulation circuit, respectively.

[0056] Insertion process: Align the first connector 520 and the second connector 560 coaxially, so that the second connector 560 is inserted into the interior of the first connector 520. During the insertion process, the first outer conical surface 5651 on the annular protrusion 565 of the second connector 560 slides relative to the first inner conical surface 5221 on the arc-shaped spring piece 522 of the first connector 520, guiding the arc-shaped spring piece 522 to expand radially; at the same time, the second outer conical surface 5222 on the arc-shaped spring piece 522 slides into contact with the second inner conical surface 573 on the second locking ring 570, squeezing the first arc-shaped piece 571 and the second arc-shaped piece 572, so that the first and second latches switch from the latched state to the separated state, thereby allowing the arc-shaped spring piece 522 to be smoothly inserted between the second connector 560 and the second locking ring 570.

[0057] As the first connector 520 and the second connector 560 are inserted into place, the annular protrusion 565 on the second connector 560 is fully engaged in the slot 533 of the arc-shaped spring piece 522 of the first connector 520, forming the first lock. The second end side of the locking body 540 cooperates with the first arc-shaped piece 571 and the second arc-shaped piece 572 to push the first arc-shaped piece 571 and the second arc-shaped piece 572 closer to each other, so that the first buckle and the second buckle are re-engaged. The first arc-shaped piece 571 and the second arc-shaped piece 572 are limited and fixed, thereby pressing the arc-shaped spring piece 522 to achieve the second lock. In this way, the first connector 520 and the second connector 560 are locked. At the same time, the unlocking rod 521 on the inner wall of the first connector 520 pushes the sealing ball 563 in the second connector 560 synchronously with the insertion, so that the sealing ball 563 overcomes the elasticity of the elastic rubber strip 564 and disengages from the opening, thereby connecting the interior of the first connector 520 and the second connector 560, and blood can flow smoothly along the channel formed by the first hose 510, the first connector 520, the second connector 560 and the second hose 550.

[0058] When an emergency closure of the access is required, medical personnel quickly pinch the bending plate 543 of the locking clamp, causing the bending plate 543 to rotate until the locking platform 541 on it can engage with the locking groove 533 on the first locking ring 530. After engagement, the bending plate 543 can compress the first tubing 510, achieving rapid occlusion of the first tubing 510 and stopping the continued flow of blood. At the same time, the bending plate 543 can squeeze the pressure end 561 of the second connector 560, creating a bending point 544 on the bending plate 543, which in turn pushes the second connector 560 away from the first connector 520. The sealing ball 563 inside the second connector 560 automatically seals the opening under the elastic force of the elastic rubber strip 564, achieving automatic occlusion of the second tubing 550. Furthermore, the bending deformation of the bending plate 543 can pull the locking body 540 to slide away from the second connector 560, causing the second end of the locking body 540 to disengage from the first arc-shaped piece 571 and the second arc-shaped piece 572. This allows the first and second latches to switch to a separated state, and the first and second arc-shaped pieces 571 and 572 to move away from each other. In this way, the first connector 520 and the second connector 560 are unlocked, and medical personnel can pull the second connector 560 to remove it from the first connector 520. At this time, both the first connector 520 and the second connector 560 are in a closed state, eliminating the risk of blood leakage. The entire process is simple to operate and highly efficient in emergency disengagement.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A self-locking connector for emergency disconnection of a blood circuit, characterized in that, include: The first connector has an unlocking component inside; one end of the first connector is fitted with a first flexible tube, and a locking clip is fitted on the outside of the first flexible tube, the locking clip being used to clamp the first flexible tube so that the first flexible tube can be blocked. The second connector has a self-sealing component inside, which can seal the inside of the second connector. One end of the second connector is fitted with a second tubing. Both the first tubing and the second tubing are used to connect to an indwelling needle or a blood circuit. The first connector and the second connector can be coaxially inserted and engaged, and the first connector and the second connector have a locked state and an unlocked state; When the first connector and the second connector are inserted into place, they are locked. At this time, the first connector and the second connector are locked, and the unlocking component can unlock the self-sealing assembly, thereby allowing internal communication between the first connector and the second connector. When the locking clamp clamps the first hose, the first connector and the second connector are unlocked, and they can be separated. The unlocking component is an unlocking rod that extends radially along the first connector and is fixedly installed on the inner wall of the first connector. The self-sealing assembly includes multiple elastic rubber strips distributed around the axis of the second connector. The multiple elastic rubber strips are fixed together to a sealing ball. The inner wall of the second connector has an opening. The elastic rubber strips tend to cause the sealing ball to seal the opening. When the first connector and the second connector are coaxially inserted, the unlocking rod can push the sealing ball, causing the sealing ball to disengage from the opening, thereby unlocking the self-sealing assembly.

2. The blood circuit emergency disconnection self-locking connector according to claim 1, characterized in that, A first locking ring is coaxially sleeved on the outside of the first hose. The first locking ring is used to press the first hose against the outer circumferential surface of the first connector. The first locking ring is provided with a slot. The locking clamp includes a locking body and a bending plate. The locking body is located outside the first locking ring. The bending plate is rotatably mounted on the locking body. The bending plate is provided with a locking platform. When the bending plate rotates until the locking platform on it is engaged in the slot, the bending plate presses and seals the first hose.

3. The blood circuit emergency disconnection self-locking connector according to claim 2, characterized in that, The first locking ring includes a first ring, a connecting plate, and a second ring. The connecting plate extends axially along the first connector. The first ring and the second ring are located at opposite ends of the connecting plate, with the first ring positioned away from the second connector relative to the second ring. The slot is disposed on the first ring. The locking body has a first end and a second end. The first end is positioned away from the second connector relative to the second end. The first end of the locking body can slide on the first ring, and the second end of the locking body can slide on the first flexible tube. The bending plate can rotate between the first ring and the second ring, thereby allowing the locking plate to engage with the slot.

4. The blood circuit emergency disengagement self-locking connector according to claim 3, characterized in that, Both the slot and the platform extend in a direction perpendicular to the axis of the first connector. Both the slot and the platform are V-shaped, and the included angle of the V-shape is acute.

5. The blood circuit emergency disconnection self-locking connector according to claim 4, characterized in that, The first connector has multiple arc-shaped spring pieces evenly distributed around its end away from the first hose. The inner circumferential surface of each arc-shaped spring piece has an annular groove. The outer circumferential surface of the second connector has an annular protrusion. A second locking ring is also coaxially fitted around the outside of the second connector. The second locking ring is used to press the second hose against the outer circumferential surface of the second connector. When the first connector and the second connector are inserted into place, the arc-shaped spring pieces can be inserted between the second connector and the second locking ring, so that the annular protrusion can be engaged in the annular groove. At the same time, the side of the second end of the locking body cooperates with the second locking ring to stop and lock the first connector and the second connector.

6. The blood circuit emergency disconnection self-locking connector according to claim 5, characterized in that, The side of the annular protrusion facing the first connector is a first outer conical surface. The first outer conical surface is coaxially arranged with the second connector. The inner circumferential surface of the arc-shaped spring is provided with a first inner conical surface. The relative sliding of the first outer conical surface and the first inner conical surface causes the arc-shaped spring to expand radially along the first connector, thereby enabling the annular protrusion to be inserted into the annular groove.

7. The blood circuit emergency release self-locking connector according to claim 6, characterized in that, The second locking ring has a first arc-shaped piece and a second arc-shaped piece at the end facing the first connector. Both the first and second arc-shaped pieces are semi-circular. The first arc-shaped piece has a first buckle, and the second arc-shaped piece has a second buckle. The first and second buckles can be in a snap-fit ​​state and a split state. When the first and second buckles are in the snap-fit ​​state, both the first and second arc-shaped pieces are coaxial with the second locking ring. When the first and second buckles are in the split state, the first and second arc-shaped pieces are far apart from each other.

8. The blood circuit emergency disengagement self-locking connector according to claim 7, characterized in that, The second locking ring has a second inner conical surface at one end facing the first connector, and the outer circumferential surface of the arc-shaped spring has a second outer conical surface. When the arc-shaped spring is inserted between the second connector and the second locking ring, the second outer conical surface and the second inner conical surface can slide relative to each other, thereby switching the first buckle and the second buckle from the snap-fit ​​state to the open state. When the first connector and the second connector are inserted into place, the side of the second end of the locking body and the first arc-shaped piece and the second arc-shaped piece are both stopped and engaged, thereby causing the first buckle and the second buckle to switch to the snap-fit ​​state, and thus locking the first connector and the second connector.

9. The blood circuit emergency disconnection self-locking connector according to claim 8, characterized in that, The first ring is provided with a stop plate, which is used to stop the first end of the locking body. The second ring is used to stop the second end of the locking body. When the bending plate presses the first hose, the locking body can slide away from the second connector, so that the second end of the locking body is released from the stop engagement with the first arc-shaped piece and the second arc-shaped piece, thereby switching the first buckle and the second buckle to a separated state, and the first arc-shaped piece and the second arc-shaped piece can move away from each other; at the same time, the bending plate can push the second connector to move away from the first connector, thereby putting the first connector and the second connector in an unlocked state and realizing separation.

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