Medical leak-proof connector

Abstract

A medical leak-proof joint includes a shell, a flow guide channel, an elastic seal, a valve core, a movable frame and an elastic reset element. The shell has an inner cavity and a first interface; the flow guide channel passes through the inner cavity of the shell and maintains a fluid seal therewith; one end of the flow guide channel has a second interface; the elastic seal closes the first interface and connects the first interface with the other end of the flow guide channel when compressed and deformed; the elastic reset element abuts against one end of the movable frame; the other end of the movable frame can be driven by an external force so that the movable frame overcomes the elastic force of the elastic reset element and moves toward the inner cavity of the shell; the movable frame and the valve core are respectively provided with a magnetic body and a magnetic conductor, and the magnetic attraction between the two can make the valve core and the movable frame move together; the valve core switches between a closed state and an open state by moving, and blocks the fluid communication between the second interface and the flow guide channel in the closed state. When the present invention is separated from medical equipment, it can minimize the phenomenon of liquid leakage and dripping.

Description

Technical Field

[0001] The present invention relates to a medical connection joint, and in particular to a medical connection joint used in conjunction with an infusion set, a syringe, a needleless joint, etc. in clinical practice. Background Art

[0002] At present, medical connectors are often used to connect infusion sets, syringes, etc. during intravenous infusion therapy. When using traditional medical connectors to connect or disconnect with infusion sets, syringes, etc., liquid leakage and dripping are likely to occur. For some liquid medicines that are harmful to human health (such as cancer chemotherapy liquids), once liquid leakage and dripping occur, the risk of contact with human skin will be greatly increased, thereby causing harm to the health of medical staff or patients. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a medical leak-proof connector, which can minimize or eliminate the phenomenon of liquid leakage and dripping when it is separated from other medical equipment.

[0004] The technical solution adopted by the present invention is:

[0005] The invention provides a medical leak-proof joint, comprising a shell, a flow guide channel, an elastic seal, a valve core, a movable frame and an elastic reset element; the shell has an inner cavity and a first interface; the flow guide channel passes through the inner cavity of the shell and maintains a fluid seal with the inner cavity; one end of the flow guide channel has a second interface; the elastic seal closes the first interface in a fluid-tight manner, and is compressed and deformed when subjected to an external force, and the first interface can be communicated with the other end of the flow guide channel when the elastic seal is compressed and deformed; the elastic reset element is arranged in the inner cavity of the shell and abuts against one end of the movable frame; the other end of the movable frame can be driven by an external force so that the movable frame overcomes the elastic force of the elastic reset element and moves toward the inner cavity of the shell, and resets under the elastic force of the elastic reset element after the external force is eliminated; the movable frame is provided with a magnetic body; the valve core is provided with a magnetic conductor; the magnetic attraction between the magnetic conductor and the magnetic body can make the valve core and the movable frame move together; the valve core switches between a closed state and an open state by moving, and the valve core blocks the fluid communication between the second interface and the flow guide channel when it is in the closed state, and forms a fluid communication between the second interface and the flow guide channel when the valve core is in the open state.

[0006] The present invention also provides a medical leak-proof connector, comprising a shell, a male Luer interface tube, an elastic seal, a puncture nail, a valve core, a movable frame and an elastic reset element; the shell has an inner cavity, a female Luer interface tube and an annular connector coaxially arranged with the male Luer interface tube; the female Luer interface tube is arranged at a first end of the shell, the annular connector is arranged at a second end of the shell opposite to the first end of the shell, and partially surrounds the male Luer interface tube, and one end of the male Luer interface tube extends out of the central through hole of the annular connector; the central through hole of the annular connector is connected to the inner cavity of the shell, and the inner circumferential surface of the annular connector is provided with an internal thread; the elastic seal closes the female Luer interface tube in a fluid-tight manner, and is compressed and deformed when subjected to external force; the puncture nail is fixedly connected to the shell, and a guide hole is provided on the top of the puncture nail; the bottom of the puncture nail is connected to the other end of the male Luer interface tube, and the puncture nail and the male Luer interface tube jointly define a guide channel, which passes through the inner cavity of the shell and maintains a fluid seal with the inner cavity; the puncture nail can pierce the elastic seal during the compression and deformation of the elastic seal The invention relates to a sealing member, and exposes a guide hole so that the liquid in the guide channel can flow to the outside through the guide hole or the fluid from the outside can flow into the guide channel through the guide hole; the elastic reset element is arranged in the inner cavity of the shell, one end of the elastic reset element is fixed, and the other end of the elastic reset element abuts against one end of the movable frame; the other end of the movable frame extends into the central through hole of the annular joint; the other end of the movable frame can be driven by an external force, so that the movable frame overcomes the elastic force of the elastic reset element and moves toward the inner cavity of the shell, and resets under the elastic force of the elastic reset element after the external force is eliminated; the movable frame is provided with a magnetic body; the valve core is arranged in the male Luer interface tube, and the inner wall of the male Luer interface tube is provided with a sealing surface matching with the valve core; the valve core is provided with a magnetic body, and the magnetic attraction between the magnetic body and the magnetic body can make the valve core and the movable frame move together; the valve core switches between a closed state and an open state by moving, and the valve core contacts and seals with the sealing surface of the male Luer interface tube when it is in a closed state, and is separated from the sealing surface of the male Luer interface tube when it is in an open state.

[0007] The present invention has at least the following advantages:

[0008] When the first interface and the second interface of the medical leak-proof joint of this embodiment are separated from the external medical device, the elastic seal and the valve core will automatically return to the closed state, thereby minimizing or eliminating the leakage and dripping of the drug solution from the first interface and the second interface, thereby ensuring the safety of medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic diagram showing the appearance of an embodiment of a medical leak-proof connector according to the present invention is shown.

[0010] Figure 2 Shows Figure 1 AA cross-section diagram of .

[0011] Figure 3 An exploded schematic diagram of an embodiment of a medical leak-proof joint according to the present invention is shown.

[0012] Figure 4 Shows Figure 3 AA cross-section diagram of .

[0013] Figure 5 A schematic cross-sectional structure diagram of a medical leak-proof connector during liquid extraction according to an embodiment of the present invention is shown.

[0014] Figure 6 The cross-sectional structure schematic diagram of the medical leak-proof connector according to one embodiment of the present invention after the liquid is drawn is shown. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Figures 1 to 4 The structure of a medical leak-proof connector according to an embodiment of the present invention is shown. Figures 1 to 4 According to an embodiment of the present invention, a medical leak-proof connector 100 includes a housing 1, an elastic seal 2, a puncture pin 3, a valve core 4, a movable frame 5, an elastic reset element 6 and a guide channel 7.

[0017] The housing 1 includes a top cover portion 1A and a housing body 1B. The top cover portion 1A includes a cover body portion 11 and a first interface tube 13, and the bottom end of the first interface tube 13 is connected to the top of the cover body portion 11. The puncture nail 3 passes through the cover body portion 11 and is connected to the cover body portion 11. In this embodiment, the puncture nail 3 is integrally formed with the cover body portion 11. The top and bottom of the cover body portion 11 are respectively provided with a first annular groove 111 and a second annular groove 112 surrounding the puncture nail 3. The bottom end of the elastic seal 2 is embedded in the first annular groove 111, and the top end of the elastic seal 2 extends into the first interface tube 13, and closes the first interface 131 (i.e., the entrance of the first interface tube 13 in this embodiment) in a fluid-tight manner. The top of the puncture nail 3 extends into a cavity 20 that opens at the bottom surface of the elastic seal and extends axially along the elastic seal. The elastic seal 2 includes a sealing portion 2A and a corrugated portion 2B, the top surface 21 of the sealing portion 2A is slightly higher than the top surface 132 of the first interface tube 13 or flush with the top surface 132 of the first interface tube 13, and the top side surface of the sealing portion 2A is interference fit with the inner wall of the first interface tube 13. The bottom of the sealing portion 2A is a conical shoulder 23, and the inner wall of the first interface tube 13 has a conical surface 133 that matches the conical shoulder 23. The conical shoulder 23 is interference-abutted against the conical surface 133, and the two realize conical surface sealing. The top of the corrugated portion 2B is connected to the bottom end of the sealing portion 2A, and at least a part of the side of the corrugated portion 2B is corrugated. The elastic reset element 6 is in the shape of a corrugated tube, and one end of the elastic reset element 6 is embedded in the second annular groove 112. Optionally, the elastic seal 2 and the elastic reset element 6 are made of non-metallic elastic materials, such as silicone, rubber, etc. In other embodiments, the elastic reset element 6 is a metal spring.

[0018] The shell body 1B has a central through hole 10, and the cover body 11 covers the top of the shell body 1B and is sealed with the shell body 1B. The sealing connection method includes but is not limited to bonding, ultrasonic welding, etc. The cover body 11 and the shell body 1B together define the inner cavity 1C of the shell. The shell body 1B is provided with an annular joint 14 at the other end of the shell opposite to the end of the shell where the first interface pipe 13 is located, and the top end of the annular joint 14 is connected to the bottom of the shell body 1B. The central through hole 140 of the annular joint 14 is connected to the inner cavity 1C of the shell, and the inner circumferential surface of the annular joint 14 is provided with an internal thread 141. In this embodiment, the annular joint 14 is integrally formed with the shell body 1B.

[0019] The flow guiding channel 7 passes through the inner cavity 1C of the shell and maintains fluid sealing with the inner cavity 1C. One end of the flow guiding channel 7 has a second interface 72 .

[0020] In this embodiment, the medical leak-proof connector 100 includes a second interface tube 8. The annular connector 14 partially surrounds the second interface tube 8, and the annular connector 14 is coaxially arranged with the second interface tube 8, and one end of the second interface tube 8 extends out of the central through hole 140 of the annular connector; the bottom of the puncture nail 3 is sealed and connected with the other end of the second interface tube 8, and the puncture nail 3 and the second interface tube 8 jointly define the above-mentioned diversion channel 7, and the inlet of the second interface tube 8 constitutes the above-mentioned second interface 72. The puncture nail 3 is provided with a diversion hole 31; the diversion channel 7 extends between the diversion hole 31 and the second interface 72.

[0021] In this embodiment, a cavity 30 extending along the axial direction of the puncture nail is formed on the bottom surface of the puncture nail 3. A guide hole 31 is formed on the side of the puncture nail 3 and passes through the cavity 30 of the puncture nail 3. The upper portion of the puncture nail 3 is conical. The bottom of the puncture nail 3 is inserted into the second interface tube 8, and the two are bonded and connected to achieve sealing.

[0022] Furthermore, an external thread 135 is provided on the side of the first interface tube 13; the first interface tube 13 is a female Luer interface tube, and the second interface tube 8 is a male Luer interface tube.

[0023] The elastic sealing member 2 will be compressed and deformed when subjected to external force. When the elastic sealing member 2 is compressed and deformed, the first interface 131 can be connected with the other end of the guide channel 7 .

[0024] In this embodiment, the puncture nail 3 can pierce the elastic seal 2 during the compression and deformation of the elastic seal 2, and expose the guide hole 31, so that the liquid in the guide channel 7 can flow to the outside through the guide hole 31 or the fluid in the outside can flow into the guide channel 7 through the guide hole 31. The guide hole 31 can be partially exposed outside the elastic seal 2, or it can be exposed outside the elastic seal 2 as a whole. The number of the guide holes 31 can be one or more. In other embodiments, the puncture nail 3 may not be provided, but the second interface tube 8 and the elastic seal 2 jointly define the guide channel 7, and at the same time, a slit is opened on the top surface of the elastic seal 2, and the slit is located above the cavity 20. When the elastic seal 2 is pushed by the external medical device and compressed and deformed, the upper surface of the elastic seal 2 will be concave, the slit opens, and the cavity 20 opens, that is, the communication between the first interface 131 and the other end of the guide channel 7 is achieved. When the external medical device is removed and the elastic seal 2 returns to its original state, the slit is automatically closed, and the elastic seal 2 closes the first interface 131 again.

[0025] The elastic reset element 6 is disposed in the inner cavity 1C of the housing 1, one end of the elastic reset element 6 is embedded in the second annular groove 112, and thus fixed, and the other end of the elastic reset element abuts against one end of the moving frame 5. The other end of the moving frame 5 can be driven by an external force, so that the moving frame 5 overcomes the elastic force of the elastic reset element 6 and moves toward the inner cavity 1C of the housing, and resets under the elastic force of the elastic reset element 6 after the external force is eliminated. The moving frame 5 is provided with a magnetic body 51.

[0026] The valve core 4 is provided with a magnetizer 42, and the magnetic attraction between the magnetizer 42 and the magnetic body 51 can make the valve core 4 and the moving frame 5 move together. The magnetic body 51 can be made of materials such as neodymium iron boron, and the magnetizer can be made of iron, steel, etc. The valve core 4 switches between a closed state and an open state by moving. When the valve core 4 is in the closed state, the fluid communication between the second interface 72 and the guide channel 7 is blocked, and when the valve core 4 is in the open state, the fluid communication between the second interface 72 and the guide channel 7 is formed.

[0027] In the present embodiment, the magnetic body 51 is a magnetic ring, which surrounds the valve core 4; the magnetic conductor 42 is a magnetic block. This structure enables a large magnetic attraction to be generated between the magnetic body 51 and the magnetic conductor 42, and can ensure the uniformity of the force. The movable frame 5 includes a movable frame body 5A and a force-bearing portion 5B. The movable frame body 5A is in the shape of a hollow cylinder, and the inner circumference of the movable frame body 5A is provided with an annular groove 53, and the magnetic ring 51 is installed in the annular groove 53. The bottom surface of the movable frame body 5A abuts against the bottom surface 151 of the shell cavity 1C, which plays a limiting role on the movable frame body 5A. The top of the movable frame body 5A abuts against the other end of the elastic reset element 6. The top of the force-bearing portion 5B is connected to the bottom of the movable frame body 5A, and the bottom end of the force-bearing portion 5B extends into the central through hole 140 of the annular joint 14. The force-bearing portion 5B can be an annular cylinder, or it can be composed of a pair of cantilevers.

[0028] In this embodiment, the valve core 4 includes a valve core body 41 and a sealing portion 43. The valve core body 41 is provided with a chamber 410 opening to the bottom surface, the top of the sealing portion 43 extends into the chamber 410, the bottom of the sealing portion 43 is sealed with the inner wall of the diversion channel 7, and the inner wall of the second interface tube 8 is provided with a sealing surface 83 that matches the valve core 4. In this embodiment, the bottom of the sealing portion 43 is conical, and the sealing surface 83 is a conical surface, and the two realize conical surface sealing. Preferably, the sealing portion 43 is made of non-metallic elastic materials such as silicone, rubber, etc., to ensure that the sealing portion 43 can achieve reliable sealing with the diversion channel 7. The magnetic conductor 42 is fixedly arranged in the chamber 410 and is located between the bottom of the chamber 410 and the top of the sealing portion 43. Further, the mouth of the cavity 30 of the puncture nail 3 is provided with a plurality of drainage grooves 35 spaced along the circumferential direction to ensure the smooth flow of the diversion channel. The top of the valve core 4 is provided with an outer conical surface 45, and the mouth of the cavity 30 of the puncture nail 3 is provided with an inner conical surface 33, and the taper of the outer conical surface 45 is smaller than the taper of the inner conical surface 33. After the valve core 4 moves into the inner cavity of the housing, the outer conical surface 45 cooperates with the inner conical surface 33 of the puncture nail 3, which can play a positioning role for the valve core 4, so that the valve core 4 can be accurately reset.

[0029] Figure 5 FIG. 2 shows a schematic cross-sectional structure diagram of a medical leak-proof connector according to an embodiment of the present invention during liquid extraction. Figure 5 When drawing liquid, the connector 201 of the syringe 200 extends into the first interface tube 13 of the medical leak-proof connector 100, and the puncture needle connector 301 connected to the liquid medicine bottle (not shown in the figure) extends into the second interface tube 8 of the medical leak-proof connector 100. The elastic seal 2 is compressed and deformed under the push of the connector 201 of the syringe 200. Since the puncture nail 3 remains stationary, the top of the elastic seal 2 is pierced during the compression and deformation of the elastic seal 2, and the guide hole 31 is exposed. Under the push of the connector 301 of the puncture needle 300, the movable frame 5 overcomes the elastic force of the elastic reset element 6 and moves toward the inner cavity 1C of the shell. The magnetic attraction between the magnetizer 42 and the magnetic body 51 causes the valve core 4 and the movable frame 5 to move together, and the valve core 4 is separated from the sealing surface 83 of the second interface tube, switching from the closed state to the open state. When the piston rod 202 of the syringe 200 is pulled backward, the liquid medicine in the liquid medicine bottle will flow into the syringe 200 through the puncture needle 300, the second interface 72, the diversion channel 7 and the diversion hole 31 in sequence.

[0030] Figure 6The schematic diagram of the cross-sectional structure of the medical leak-proof connector according to one embodiment of the present invention after the liquid extraction is completed is shown. After the liquid extraction is completed, the connector 301 of the puncture needle 300 is pulled out from the second interface tube 8. The movable frame 5 is reset under the elastic force of the elastic reset element 6. The magnetic attraction between the magnetizer 42 and the magnetic body 51 causes the valve core 4 and the movable frame 5 to move together until the valve core 4 contacts and seals with the sealing surface 83 of the second interface tube 8, and the valve core 4 switches from the open state to the closed state. Medical staff can move the medical leak-proof connector 100 and the syringe 200 to the patient's location by hand to inject the patient's liquid medicine.

[0031] When the medical staff separates the puncture needle 300 from the medical leak-proof connector 100 and moves the puncture needle 300, since the valve core 4 is in a closed state, the leakage and dripping of the drug solution from the second interface 72 are minimized or eliminated, thereby ensuring the safety of the medical staff.

[0032] After the extraction is completed, the second interface tube 8 can be connected to the needleless connector (not shown in the figure) of the infusion passage for infusion to the patient. The needleless connector pushes the movable frame 5, and then opens the valve core 4, thereby realizing the fluid communication between the infusion passage and the diversion channel 7. The medical staff pushes the piston rod 202 of the syringe 200 forward, and the liquid medicine in the syringe 200 will flow into the infusion passage, thereby realizing the infusion of the patient. After the infusion is completed, the syringe 200 is pulled out of the first interface tube 13, and the needleless connector is pulled out of the second interface tube 8. In the process of separating the syringe 200 from the medical leak-proof connector 100, the compressed and deformed elastic seal 2 will return to its original state, while the puncture nail 3 remains stationary, the elastic seal 2 covers the diversion hole 31, and closes the first interface 131, and the valve core 4 also returns to the closed state, thereby minimizing or eliminating the phenomenon of liquid medicine leaking and dripping from the first interface 131 and the second interface 72, thereby ensuring the safety of medical staff.

[0033] The description of the present embodiment is combined with specific examples, but it should be understood by those skilled in the art that the present invention is not limited to the examples described herein and that various modifications and changes may be made without departing from the spirit and scope of the present invention.

Claims

1. A medical leak-proof joint, characterized in that: It includes a housing, a flow guide channel, an elastic seal, a valve core, a movable frame and an elastic reset element; The housing has an inner cavity and a first interface; The guide channel passes through the inner cavity of the shell and maintains a fluid-tight seal with the inner cavity; one end of the guide channel has a second interface; The elastic seal closes the first interface in a fluid-tight manner and is compressed and deformed when subjected to an external force, so that the first interface can be connected to the other end of the guide channel when the elastic seal is compressed and deformed; The elastic reset element is arranged in the inner cavity of the shell and abuts against one end of the movable frame; The other end of the movable frame can be driven by an external force, so that the movable frame overcomes the elastic force of the elastic reset element and moves toward the inner cavity of the shell, and resets under the elastic force of the elastic reset element after the external force is eliminated; the movable frame is provided with a magnetic body; The valve core is provided with a magnetic conductor; the magnetic attraction between the magnetic conductor and the magnetic body can make the valve core and the movable frame move together; the valve core switches between a closed state and an open state by moving, and when the valve core is in a closed state, the fluid connection between the second interface and the guide channel is blocked, and when the valve core is in an open state, the fluid connection between the second interface and the guide channel is established.

2. The medical leak-proof joint according to claim 1, characterized in that: The medical leak-proof joint comprises a puncture nail, the puncture nail is fixedly connected to the housing, and the puncture nail is provided with a flow guide hole; the flow guide channel extends between the flow guide hole and the second interface; The puncture nail can pierce the elastic seal during the compression and deformation of the elastic seal and expose the guide hole, so that the liquid in the guide channel can flow to the outside through the guide hole or the external fluid can flow into the guide channel through the guide hole.

3. The medical leak-proof joint according to claim 2, characterized in that: The elastic seal has a top end close to the first interface and a bottom end away from the first interface, and the bottom end of the elastic seal is provided with a cavity extending along the axial direction of the elastic seal; The top of the puncture nail extends into the cavity of the elastic seal, and the bottom surface of the puncture nail is provided with a cavity extending along the axial direction of the puncture nail; the guide hole is provided on the side of the puncture nail and passes through the cavity of the puncture nail.

4. The medical leak-proof joint according to claim 3, characterized in that: The top of the valve core is provided with an outer conical surface, the cavity opening of the puncture nail is provided with an inner conical surface, and the taper of the outer conical surface is smaller than the taper of the inner conical surface.

5. The medical leak-proof joint according to claim 1, characterized in that: The magnetic body is a magnetic ring, and the magnetic ring surrounds the valve core; the magnetic conductive body is a magnetic conductive block.

6. The medical leak-proof connector according to claim 5, characterized in that: The movable frame comprises a movable frame body and a force-bearing part; the movable frame body is in the shape of a hollow cylinder, the inner circumference of the movable frame body is provided with an annular groove, and the magnetic ring is installed in the annular groove; the bottom surface of the movable frame body abuts against the bottom surface of the inner cavity of the shell, and the top of the movable frame body abuts against the other end of the elastic reset element; the top end of the force-bearing part is connected to the bottom of the movable frame body.

7. The medical leak-proof joint according to claim 2, characterized in that: The housing has a first interface tube and an annular joint; the medical leak-proof joint includes a second interface tube; The first interface pipe is arranged at one end of the shell, the annular joint is arranged at the other end of the shell opposite to the one end of the shell, and partially surrounds the second interface pipe, the annular joint is coaxially arranged with the second interface pipe, and one end of the second interface pipe extends out of the central through hole of the annular joint; the central through hole of the annular joint is communicated with the inner cavity of the shell, and the inner circumferential surface of the annular joint is provided with an internal thread; The bottom of the puncture spike is sealedly connected to the other end of the second interface tube, and the puncture spike and the second interface tube jointly define the diversion channel.

8. The medical leak-proof connector according to claim 7, characterized in that: The housing comprises a top cover and a housing body; The top cover portion includes a cover body portion and the first interface tube, the bottom end of the first interface tube is connected to the top of the cover body portion; the puncture pin passes through the cover body portion and is connected to the cover body portion; the top and bottom of the cover body portion are respectively provided with a first annular groove and a second annular groove surrounding the puncture pin, the bottom end of the elastic seal is embedded in the first annular groove, the top end of the elastic seal extends into the first interface tube, and the top of the puncture pin extends into the cavity opening at the bottom surface of the elastic seal; one end of the elastic reset element is embedded in the second annular groove; The shell body has a central through hole, the cover body covers the top of the shell body and is sealed with the shell body; the top end of the annular joint is connected with the bottom of the shell body.

9. The medical leak-proof joint according to any one of claims 1 to 8, characterized in that: The valve core includes a valve core body and a sealing part; the valve core body is provided with a cavity opening to the bottom surface, the top of the sealing part extends into the cavity, the bottom of the sealing part is sealed with the inner wall of the guide channel, and the sealing part is made of non-metallic elastic material; the magnetic conductor is fixedly arranged in the cavity and is located between the bottom of the cavity and the top of the sealing part.

10. A medical leak-proof joint, characterized in that: It includes a housing, a male Luer interface tube, an elastic seal, a puncture nail, a valve core, a movable frame and an elastic reset element; The housing has an inner cavity, a female Luer interface tube, and an annular joint coaxially arranged with the male Luer interface tube; the female Luer interface tube is arranged at a first end of the housing, the annular joint is arranged at a second end of the housing opposite to the first end of the housing, and partially surrounds the male Luer interface tube, one end of the male Luer interface tube extends out of the central through hole of the annular joint; the central through hole of the annular joint is in communication with the inner cavity of the housing, and an inner circumferential surface of the annular joint is provided with an internal thread; The elastic seal closes the female Luer interface tube in a fluid-tight manner and is compressed and deformed when subjected to external force; the puncture spike is fixedly connected to the shell, and a guide hole is provided on the top of the puncture spike; the bottom of the puncture spike is connected to the other end of the male Luer interface tube, and the puncture spike and the male Luer interface tube jointly define a guide channel, which passes through the inner cavity of the shell and maintains a fluid seal with the inner cavity; the puncture spike can pierce the elastic seal during the compression and deformation of the elastic seal and expose the guide hole, so that the liquid in the guide channel can flow to the outside through the guide hole or the external fluid can flow into the guide channel through the guide hole; The elastic reset element is arranged in the inner cavity of the shell, one end of the elastic reset element is fixed, and the other end of the elastic reset element abuts against one end of the movable frame; The other end of the movable frame extends into the central through hole of the annular joint; the other end of the movable frame can be driven by an external force, so that the movable frame overcomes the elastic force of the elastic reset element and moves toward the inner cavity of the shell, and resets under the elastic force of the elastic reset element after the external force is eliminated; the movable frame is provided with a magnetic body; The valve core is arranged in the male Luer interface tube, and the inner wall of the male Luer interface tube is provided with a sealing surface that matches the valve core; the valve core is provided with a magnetic conductor, and the magnetic attraction between the magnetic conductor and the magnetic body can make the valve core and the movable frame move together; the valve core switches between a closed state and an open state by moving, and when the valve core is in the closed state, it contacts and seals with the sealing surface of the male Luer interface tube, and when the valve core is in the open state, it is separated from the sealing surface of the male Luer interface tube.

Images