Separators that easily fall off

Abstract

To provide a separator with a movable closing connector and a needleless connector that are likely to be separated from each other to prevent leakage of a liquid medication or blood even when a patient moves unexpectedly and can be used repeatedly when being sterilized with alcohol cotton.SOLUTION: A movable closing connector 22 includes a body, a first connection part, and a first elastic valve. The body includes a cylinder part and a first engaging part. The first engaging part is a projecting block and provided on the cylinder part. A needleless connector includes a housing, a second connection part, and a second elastic valve. The housing or the second connection part includes a second engaging part. The second engaging part is a projecting block. The force with which the first engaging part is fixed to the second engaging part is 1.4 to 8.1 Newton meters, and thereby exerts effect of being likely to be separated.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a separator used in an infusion system, and particularly to a separator that is prone to falling off.

Background Art

[0002] U.S. Patent No. US10688295B2 discloses a drug mixing device, and the drug mixing procedure thereby includes the following steps: According to a doctor's instruction, take out a vial bottle containing a specific component, and the inside of the vial contains a powder of the specific component; according to the doctor's instruction, take out an infusion liquid bag containing a diluting solution; the vial is fitted into the integral vial adapter of the needleless additive port, and the puncturing member of the vial adapter pierces the cap of the vial; one end of the puncturing part pierces the membrane of the infusion tube of the soft bag; the soft bag is positioned above and the vial is positioned below, and by extruding the soft bag, the diluting solution in the soft bag enters the inside of the vial after passing through the opening and passage of the puncturing part, the second flow path of the discharge part, the first flow path of the connection part, and the insertion needle; by shaking the vial, the powder in the vial can be slightly mixed to obtain a high-concentration chemical solution; then, the soft bag is positioned below and the vial is positioned above; the soft bag is extruded, and the air in the soft bag enters the inside of the vial after passing through the through hole and the long hole of the puncturing part, the second flow path of the discharge part, the first flow path of the connection part, and the insertion needle, and by loosening the hand, the liquid in the vial is sucked out. This step is repeated to ensure that the liquid in the vial is completely sucked into the soft bag.

[0003] The conventional drug mixing device infusion procedure includes the following steps: step (a), remove the plug of the administration port from the other end of the tube; step (b), place the infusion set at the other end of the tube and pass it through the sealing membrane so that the infusion set communicates with the second channel of the discharge port via the third channel of the tube; step (c), position the soft bag on top and the infusion set on the bottom, and the diluted drug in the soft bag enters the patient's body by passing through the perforation and elongated holes of the puncture port, the second channel of the discharge port, the third channel of the tube, and the infusion set in that order.

[0004] However, as the highly concentrated drug solution in the vial passes through the elongated hole at the puncture site, air enters, and it is not possible to aspirate the drug solution in a single pass. As a result, some of the highly concentrated drug solution adheres to and remains in the elongated hole at the puncture site. As the air in the soft bag passes through the elongated hole at the puncture site, the highly concentrated drug solution that adheres to the inner wall of the passage at the puncture site is all pushed by the air into the space between the second channel of the discharge section and the insertion hole, forming a remaining highly concentrated drug solution that is blocked by the tube. Even if the soft bag is loosened, the airflow cannot push the remaining highly concentrated drug solution in the space between the second channel of the discharge section and the insertion hole back into the soft bag. Therefore, when the drug mixing procedure is repeated, the space between the second channel of the discharge section and the insertion hole becomes filled with the remaining highly concentrated drug solution due to the expulsion of air.

[0005] The highly concentrated drug solution remaining in the space between the second channel of the discharge section and the insertion hole is not diluted and therefore has a very high concentration. When a nurse performs the infusion procedure using a conventional drug mixing device, the highly concentrated drug solution remaining in the space between the second channel of the discharge section and the insertion hole enters the patient's body first, and then the diluted drug in the soft bag enters the patient's body. After the residual highly concentrated drug solution enters the patient's body, it can cause adverse reactions in the patient's body. Therefore, it is common for patients to feel unwell at the beginning of the infusion procedure. When such conventional drug mixing devices are used for patients who require precise quantitative drug administration during drug infusion, such as pregnant women or critically ill patients, it often leads to serious consequences, and can even be life-threatening.

[0006] Some nurses, noticing the above situation, drain the highly concentrated drug solution remaining in the space between the second channel of the discharge port and the insertion hole through the third channel of the tube after step (a) and before step (b) of the infusion procedure. However, this method reduces the amount of drug solution directly injected into the patient's body, is inconsistent with the doctor's instructions, reduces the therapeutic effect, and leads to drug waste.

[0007] Furthermore, in step (c) of the injection procedure of conventional drug mixing devices, the first channel of the connection and the second channel of the discharge section remain in communication. As a result, some of the diluted drug returns to the inside of the vial from the second channel of the discharge section through the first channel of the connection and the insertion needle, reducing the amount of drug solution injected into the patient's body. This does not conform to the doctor's instructions, thus reducing the therapeutic effect and causing drug waste.

[0008] Furthermore, because the connection point lacks a sealing effect, removing the vial from the connection point may cause residual high-concentration drug solution to leak to the outside through the connection point. For this reason, conventional drug mixing devices can only be used once and cannot be reused.

[0009] Furthermore, conventional infusion systems consist of a drug mixing device, an infusion set, a dispenser, a separator, and an indwelling needle. Because manic patients tend to move around easily, the dispenser and separator can easily separate, as can the indwelling needle and artificial blood vessel, resulting in leakage of medication and blood to the outside.

[0010] U.S. Patent Publication US6651956B2 discloses a slit-type swabble valve, U.S. Patent Publication US9415199B2 discloses a closed-type connector, and U.S. Patent Publication US10201693B2 also discloses a closed-type connector. These three patents can be installed in the connection of a prior art needleless control port shown in Figure 1 of U.S. Patent Publication US10688295B2 and used to connect to a syringe. The syringe can inject a high-concentration drug solution into a soft bag using the drug mixing device of the above patent combination. The slit-type swabble valve has a closing effect and solves the problem of the lack of a closing effect in the connection of U.S. Patent Publication US10688295B2. Therefore, the drug mixing device of the above patent combination can be reused. Unfortunately, the above patent combination cannot solve the other problems of U.S. Patent Publication US10688295B2.

[0011] U.S. Patent Publication US 11235135B2 discloses a need-free infusion closure connector for preventing leakage of drug solution, comprising a first connection assembly and a second connection assembly. The first connection assembly comprises a first tubular portion forming a first opening and a first elastic valve that tends to seal the first opening. The second connection assembly comprises a second tubular portion forming a second opening and a second elastic valve that tends to seal the second opening. The tendency of the first elastic valve to seal the first opening of the first tubular portion and the tendency of the second elastic valve to seal the second opening prevents leakage of drug solution remaining in the syringe and infusion conduit connection assembly and the vial and body end connection assembly, and further prevents leakage by closing in both directions when connecting and disconnecting after adding or infusing drug solution. [Overview of the project] [Problems that the invention aims to solve]

[0012] The main objective of this invention is to provide an easily detachable separator that, even if the patient moves on their own, allows the movable closing connector and needleless connector to quickly separate, preventing leakage of medication or blood, and can be disinfected with an alcohol swab and reused without the need for replacement. [Means for solving the problem]

[0013] To achieve the above objective, the present invention provides a separator that is easily detached, the separator comprising a valve body, a screw structure having an internal conduit and defined as the injection end of the separator, with a female thread at the first end screwed into a male thread at the first end of the valve body, a discharge end with the first end installed at the second end of the valve body, and an engaging needleless connector module, the engaging needleless connector module comprising a movable closing connector and a needleless connector, the movable closing connector comprising a body, a first coupling portion and a first elastic valve, and The main body comprises a cylindrical portion, a conduit, a positioning portion, and a first engaging portion, the conduit being installed inside the cylindrical portion and having a first passage and a first opening, the positioning portion being located inside the cylindrical portion and installed outside the conduit, the first engaging portion being a convex block installed on the cylindrical portion, the first coupling portion being installed on the cylindrical portion, the first elastic valve comprising a first circumferential portion and a first sealing portion, both ends of the first circumferential portion being installed on the positioning portion and the first coupling portion, respectively, the first sealing portion being located inside the first passage and its first end being The needleless connector comprises a housing, a second coupling portion, and a second elastic valve, wherein the housing has a second engaging portion, the second engaging portion is a convex block installed on the outer surface of the housing or the outer surface of the second coupling portion, the first end of the housing has a second opening, the second coupling portion is installed on the second end of the housing and has a third opening, and is screwed into the screw structure, the third opening is in communication with the internal conduit. The second elastic valve comprises a second circumferential portion and a second sealing portion, the second circumferential portion being installed inside the housing and the second coupling portion and having a second passage, the second passage communicating with the third opening, the third opening communicating with the internal conduit, the second sealing portion being installed inside the housing and having a slit that closes the second opening, and when the movable closing connector is aligned and connected to the needleless connector, the first engaging portion is fixed to the second engaging portion, and the force that fixes the first engaging portion to the second engaging portion is 1.4 to 8.The pressure is 1 Newton meter, and the conduit compresses the second seal portion, and the second seal portion compresses the second circumferential portion, causing the second seal portion to separate from the second opening, the conduit passes through the slit of the second seal portion and enters the interior of the second seal portion, the first end of the housing abuts against the inner wall of the cylindrical portion, and the positioning portion moves along the conduit in a direction away from the needleless connector, compressing the first circumferential portion, causing the second end of the first seal portion to separate from the first opening, and the first passage, the second passage When the path communicates with the internal conduit and the movable closing connector is separated from the needleless connector, the first engaging portion disengages from the second engaging portion, and the conduit disengages from the second sealing portion, thereby sealing the slit of the second sealing portion. The second sealing portion returns to its original position due to the elastic force of the second circumferential portion, closing the second opening. The first end of the housing disengages from the cylindrical portion, and the positioning portion and the first sealing portion return to their original positions due to the elastic force of the first circumferential portion, causing the second end of the first sealing portion to close the first opening.

[0014] To achieve the above objective, the present invention provides a separator that is easily detached, the separator comprising a valve body, a screw structure having an internal conduit and defined as the injection end of the separator, with a female thread at the first end screwed into a male thread at the first end of the valve body, a discharge end with the first end installed at the second end of the valve body, and an engaging needleless connector module, the engaging needleless connector module comprising a movable closing connector and a needleless connector, the movable closing connector comprising a body, a first coupling portion and a first elastic valve, the body being a cylinder The first elastic valve comprises a section, a conduit, a positioning section, and a first engaging section, wherein the conduit is installed inside the cylindrical section and has a first passage and a first opening, the positioning section is located inside the cylindrical section and installed outside the conduit, the first engaging section is a convex block installed on the cylindrical section, and the first coupling section is installed on the cylindrical section, and the first elastic valve comprises a first circumferential section and a first sealing section, one end of the first circumferential section is installed on the positioning section, the first sealing section is located inside the first passage and its first end is connected to the inner surface of the first circumferential section and the first passage Multiple interconnected perforations are provided, the second end of which closes the first opening, and the needleless connector comprises a housing, a second coupling portion, a connecting pipe, a third elastic valve, and a fourth elastic valve, the housing or the second coupling portion having a second engaging portion, the second engaging portion being a convex block installed on the outer surface of the housing or the outer surface of the second coupling portion, the first end of the housing having a second opening, the second coupling portion being installed on the second end of the housing having a third opening and being integrally molded with the screw structure, the third opening being in communication with the internal conduit, and the connecting The conduit is installed within the housing and comprises an upper column, a large-diameter portion, and a lower column, the upper column being installed above the large-diameter portion, having a closed end at its top and at least one through-hole, the at least one through-hole penetrating the side wall of the upper column and communicating with the interior of the upper column, the lower column being installed below the large-diameter portion, having an open end at its bottom, the interior of the upper column and the interior of the large-diameter portion communicating with the interior of the lower column, the third elastic valve is installed within the housing and has a third ring portion and a third sealing portion, the third ring portion is,The third seal portion is provided at the top end of the third ring portion and has a slit, and the fourth elastic valve is installed inside the housing and has a fourth ring portion and a fourth seal portion, the fourth ring portion is provided at the top end of the fourth ring portion and has a slit, the second end of the housing presses against the top end of the fourth seal portion and the fourth seal portion is positioned inside the lower column and the third opening A slit is provided, and when the movable closing connector is aligned with the needleless connector and connected, the first engaging portion is fixed to the second engaging portion, and the force with which the first engaging portion is fixed to the second engaging portion is 1.4 to 8.1 Newton meters, and the upper column expands the slit of the third seal portion and presses against the first seal portion, compressing it, passing through the first opening and entering the conduit, the conduit compresses the third seal portion, and the third seal portion compresses the third ring portion, thereby opening the at least one perforation of the upper column The third seal portion is exposed to the outside and positioned inside the conduit, the third ring portion presses against the large diameter portion, the large diameter portion compresses the fourth ring portion, and the lower column widens the slit of the fourth seal portion and enters the third opening, thereby connecting the first passage and the connecting pipe to the inner conduit, and when the movable closing connector is separated from the needleless connector, the first engaging portion detaches from the second engaging portion, and the fourth ring portion presses against the large diameter portion by its elastic force, thereby moving the connecting pipe and the third elastic valve, and the lower column widens the slit of the fourth ring By returning to the interior of the circumferential portion, the slit of the fourth seal portion is sealed, and the third ring-circumferential portion, by its elastic force, presses against the conduit and moves the movable closing connector, causing the upper column to detach from the conduit and return to the third ring-circumferential portion, and the conduit detaches from the third seal portion, thereby sealing the slit of the third seal portion, and the third seal portion returns due to the elastic force of the third ring-circumferential portion to close the second opening, the first end of the housing detaches from the cylindrical portion, and the first seal portion returns due to its elastic force,The second end of the first sealing portion closes the first opening. [Effects of the Invention]

[0015] The effect of this invention is that the force with which the first engaging part is fixed to the second engaging part is 1.4 to 8.1 Newton meters (1 to 6 pounds per foot), and it is easy to separate. Even if the patient moves on their own, the movable closing connector and the needleless connector can be quickly separated to prevent leakage of medication or blood. Furthermore, it can be reused without replacement by disinfecting with an alcohol swab. [Brief explanation of the drawing]

[0016] [Figure 1] This is a schematic diagram of the infusion system according to the present invention. [Figure 2] This is a cross-sectional exploded view of the first embodiment of the second chemical mixing apparatus according to the present invention. [Figure 3] This is a cross-sectional exploded view of a second embodiment of the second chemical mixing apparatus according to the present invention. [Figure 4] This is an exploded cross-sectional view of the separator according to the present invention. [Figure 5A] This is a schematic diagram showing the first embodiment of the second chemical mixing apparatus according to the present invention, in which chemical mixing and infusion are performed. [Figure 5B] This is a schematic diagram showing region A in Figure 5A. [Figure 6] This is a schematic diagram illustrating the second embodiment of the second chemical mixing apparatus according to the present invention, showing the process of chemical mixing and infusion. [Figure 7A] This is a schematic diagram of the separator for infusion according to the present invention. [Figure 7B] This is a schematic diagram showing region B in Figure 7A. [Figure 8] This is a schematic diagram showing another embodiment of the first closed-type needleless connector module according to the present invention. [Figure 9A] This is a perspective exploded view of a second embodiment of the third closed-type needleless connector module according to the present invention. [Figure 9B]Cross-sectional exploded view of the second embodiment of the third closed needleless connector module according to the present invention. [Figure 9C] Cross-sectional view of the second embodiment of the third closed needleless connector module according to the present invention. [Figure 9D] Schematic diagram showing region C of FIG. 9C. [Figure 9E] Perspective cross-sectional view of region C of FIG. 9C. [Figure 10A] Perspective exploded view of the third embodiment of the third closed needleless connector module according to the present invention. [Figure 10B] Cross-sectional exploded view of the third embodiment of the third closed needleless connector module according to the present invention. [Figure 10C] Cross-sectional view of the third embodiment of the third closed needleless connector module according to the present invention. [Figure 10D] Schematic diagram showing region D of FIG. 10C. [Figure 11A] Perspective view of other uses of the syringe and the valve body. [Figure 11B] Side view of other uses of the syringe and the valve body. [Figure 12A] Cross-sectional view of the syringe and the movable closed connector integrally formed. [Figure 12B] Cross-sectional view of the syringe and other movable closed connectors integrally formed. [Figure 13A] Perspective view of the fourth embodiment of the third closed needleless connector module according to the present invention. [Figure 13B] Perspective exploded view of the fourth embodiment of the third closed needleless connector module according to the present invention. [Figure 13C] Cross-sectional view of the fourth embodiment of the third closed needleless connector module according to the present invention. [Figure 13D] Another use in the fourth embodiment of the third closed needleless connector module according to the present invention, and it is a cross-sectional view in which the syringe provides positive pressure. [Figure 13E] Schematic diagram showing region E of FIG. 13D. [Figure 13F] This is a schematic diagram showing the continuous operation in which a balance pressure valve deforms under the influence of positive pressure in a fourth embodiment of the third closed-type needleless connector module according to the present invention. [Figure 13G] This is a cross-sectional view of another application in a fourth embodiment of the third closed-type needleless connector module according to the present invention, in which a balanced pressure valve provides a check valve function. [Figure 13H] This is a schematic diagram showing region F in Figure 13G. [Figure 13I] This is a cross-sectional view of another application in a fourth embodiment of the third closed-type needleless connector module according to the present invention, where the balanced pressure valve loses its check valve function. [Figure 13J] This is a schematic diagram showing region G in Figure 13I. [Figure 14A] This is a perspective view of a fifth embodiment of the third closed-type needleless connector module according to the present invention. [Figure 14B] This is a perspective exploded view of a fifth embodiment of the third closed-type needleless connector module according to the present invention. [Figure 14C] This is a cross-sectional view of a fifth embodiment of the third closed-type needleless connector module according to the present invention. [Figure 14D] This is a cross-sectional view of another application in the fifth embodiment of the third closed-type needleless connector module according to the present invention, in which a syringe provides positive pressure. [Figure 14E] This is a schematic diagram showing region H in Figure 14D. [Figure 14F] This is a cross-sectional view of another application in a fifth embodiment of the third closed-type needleless connector module according to the present invention, in which a balanced pressure valve provides a check valve function. [Figure 14G] This is a schematic diagram showing region I in Figure 14F. [Figure 15A] This is a perspective view of a sixth embodiment of the third closed-type needleless connector module according to the present invention. [Figure 15B] This is a perspective exploded view of a sixth embodiment of the third closed-type needleless connector module according to the present invention. [Figure 15C]This is a cross-sectional view of a sixth embodiment of the third closed-type needleless connector module according to the present invention. [Figure 16A] This is a cross-sectional exploded view of the seventh embodiment of the third closed-type needleless connector module according to the present invention. [Figure 16B] This is a cross-sectional view of the seventh embodiment of the third closed-type needleless connector module according to the present invention. [Modes for carrying out the invention]

[0017] Embodiments of the present invention will be described in more detail below with reference to the drawings and reference numerals, so that those skilled in the art can implement them after studying this specification.

[0018] As shown in Figure 1, the present invention provides an infusion system comprising a first drug mixing device 10, two second drug mixing devices 20, 20A, three infusion sets 30, 30A, 30B, a distributor 40, a separator 50, and an indwelling needle 60.

[0019] The first chemical mixing device 10, like the second chemical mixing device 20, includes a puncture section 11, a connection section 12, a discharge section 13, and a plug connector 14. Referring to Figure 2, the details of the above configuration will be explained below using the second chemical mixing device 20 as an example.

[0020] The first end of the puncture section 11 is a sharp end, and the side wall of the puncture section 11 is provided with a U-shaped through-hole 111 and three side holes 112. The puncture section 11 is divided into an internal space of one first elongated hole 114 and three second elongated holes 115 by a first partition wall 113, the first elongated hole 114 is in communication with the U-shaped through-hole 111, and each of the second elongated holes 115 is in communication with each of the side holes 112.

[0021] Furthermore, the distance D1 from the top of the U-shaped through-hole 111 to the sharp end of the puncture portion 11 is smaller than the distance D2 from the top of the side hole 112 to the sharp end of the puncture portion 11. In other words, the distance between the top of the U-shaped through-hole 111 and the sharp end of the puncture portion 11 is small, forming a U-shaped hole, while the distance between the top of the side hole 112 and the sharp end of the puncture portion 11 is large.

[0022] The connecting portion 12 includes a connector coupling seat 121. The connector coupling seat 121 is integrally molded on one side of the second end of the puncture portion 11 and is provided with a first flow path 1211 that communicates with the U-shaped through hole 111.

[0023] The discharge section 13 is installed at the second end of the puncture section 11 and is provided with a second flow path 131 and an insertion hole 132, with the second flow path 131 communicating between the second elongated hole 115 and the insertion hole 132. In this embodiment, the outer surface of the discharge section 13 is a smooth curved surface.

[0024] Between the connection section 12 and the discharge section 13, the first flow path 1211 and the second flow path 131 are separated by a second partition wall 15, and the first partition wall 113 is connected to the second partition wall 15.

[0025] The plug connector 14 has a tubular body 141. The tubular body 141 is provided with a third flow path 1411, and the first end of the tubular body 141 is inserted into the insertion hole 132 so that the second flow path 131 communicates with the third flow path 1411. Inside the third flow path 1411, a shut-off section 1412 is provided to close the third flow path 1411.

[0026] As shown in Figure 1, the connection section 12 of the first chemical mixing device 10 further comprises a vial adapter 122. The vial adapter 122 is integrally molded with the connector coupling seat 121, has an insertion needle, and is used to connect to the vial 100.

[0027] As shown in Figures 2 and 5A, the structural difference between the second chemical mixing device 20 and the first chemical mixing device 10 is that the second chemical mixing device 20 further includes a first closed-type needleless connector module 21 instead of the vial adapter 122. More specifically, the first closed-type needleless connector module 21 includes a movable closing connector 22 and a first needleless connector 23.

[0028] The movable closing connector 22 comprises a main body 221, a first coupling portion 222, and a first elastic valve 223. The main body 221 comprises a cylindrical portion 2211, a conduit 2212, a positioning portion 2213, and a first engaging portion 2214. The cylindrical portion 2211 comprises an upper cylindrical portion 22111, a middle cylindrical portion 22112, and a lower cylindrical portion 22113. The middle cylindrical portion 22112 is installed between the first end of the upper cylindrical portion 22111 and the first end of the lower cylindrical portion 22113, a first through hole 22114 is provided between the side wall of the upper cylindrical portion 22111 and the side wall of the middle cylindrical portion 22112, and a second through hole 22115 is provided between the side wall of the middle cylindrical portion 22112 and the side wall of the lower cylindrical portion 22113.

[0029] The conduit 2212 extends from inside the upper cylindrical portion 22111 to inside the middle cylindrical portion 22112 and has a first passage 22121 and a first opening 22122. The positioning portion 2213 is located inside the upper cylindrical portion 22111 and is installed outside the conduit 2212. The first engaging portion 2214 includes an arm portion 22141, a connecting portion 22142, and a hook portion 22143. The connecting portion 22142 is installed in the upper cylindrical portion 22111 and connects to the arm portion 22141 from inside the upper cylindrical portion 22111 through a first through hole 22114, and the hook portion 22143 is installed at one end of the arm portion 22141 and is located inside a second through hole 22115. The first connecting portion 222 includes a first end portion 2221, a second end portion 2222, and a connecting passage 2223.

[0030] The first end portion 2221 is installed at the second end of the upper cylindrical portion 22111 and has a groove 22211 with an arc-shaped groove wall, and the second end portion 2222 is a vial adapter having an insertion needle 1221 and is used to connect to a vial 100A (see Figures 1 and 5A). The communication passage 2223 passes through the first end portion 2221 and the second end portion 2222 and communicates with the groove 22211. The first elastic valve 223 comprises a first circumferential portion 2231 and a first sealing portion 2232.

[0031] Both ends of the first circumferential portion 2231 are positioned at the positioning portion 2213 and the first end portion 2221, respectively. The first sealing portion 2232 is located within the first passage 22121, and the first end of the first sealing portion 2232 is connected to the inner surface of the first circumferential portion 2231, providing a plurality of perforations 2233. These perforations 2233 communicate with the first passage 22121 and the groove 22211, and the second end of the first sealing portion 2232 closes the first opening 22122.

[0032] The first needleless connector 23 comprises a housing 231, a second coupling portion 232, and a second elastic valve 233. The housing 231 comprises an upper housing 2311, a lower housing 2312, a second engaging portion 2313, and a stabilizing member 2314. The first end of the upper housing 2311 has a second opening 23111, the outer diameter of the upper housing 2311 is smaller than the outer diameter of the lower housing 2312, and the second engaging portion 2313 is a convex block installed on the outer surface of the first end of the lower housing 2312.

[0033] The stabilizing member 2314 is a convex block and is installed on the outer surface of the second end of the lower housing 2312. The second coupling portion 232 comprises a first end portion 2321 and a second end portion 2322. The first end portion 2321 is installed on the second end of the lower housing 2312, and the second end portion 2322 has a third opening 23222 and is used to connect to the connector coupling seat 121. The second elastic valve 233 comprises a second annular portion 2331 and a second sealing portion 2332.

[0034] The second circumferential portion 2331 is installed inside the lower housing 2312 and the second connecting portion 232 and has a second passage 23311, which communicates with the third opening 23222. The second sealing portion 2332 is installed inside the upper housing 2311 and has a slit 23321 that closes the second opening 23111.

[0035] As shown in Figure 5A, and referring to Figure 2, when the movable closing connector 22 is aligned and connected to the first needleless connector 23, the second engaging portion 2313 is positioned in the second through hole 22115 and the hook portion 22143 is fixed to the bottom end of the second engaging portion 2313. The conduit 2212 compresses the second sealing portion 2332, and the second sealing portion 2332 compresses the second annular portion 2331, causing the second sealing portion 2332 to separate from the second opening 23111, and the conduit 2212 passes through the slit 23321 and enters the interior of the second sealing portion 2332.

[0036] The first end of the upper housing 2311 abuts against the inner wall of the middle cylindrical portion 22112. The positioning portion 2213 moves along the conduit 2212 in a direction away from the first needleless connector 23, compressing the first circumferential portion 2231, so that the second end of the first sealing portion 2232 separates from the first opening 22122 and the first passage 22121 communicates with the second passage 23311. Since the inner surface of the lower cylindrical portion 22113 abuts against the outer surface of the stabilizing member 2314, the lower housing 2312 does not shake within the lower cylindrical portion 22113.

[0037] As shown in Figure 2, and referring to Figure 5A, when the movable closing connector 22 is separated from the first needleless connector 23, the hook portion 22143 presses against the arm portion 22141 so that it disengages from the bottom end of the second engaging portion 2313. The conduit 2212 disengages from the second sealing portion 2332, thereby sealing the slit 23321. The second sealing portion 2332 returns to its original position due to the elastic force of the second ring portion 2331, closing the second opening 23111. The first end of the upper housing 2311 disengages from the middle cylinder portion 22112. The positioning portion 2213 and the first sealing portion 2232 return to their original position due to the elastic force of the first ring portion 2231, so that the second end of the first sealing portion 2232 closes the first opening 22122.

[0038] Preferably, the force that fixes the hook portion 22143 to the second engaging portion 2313 is 96.14 Newton meters. The condition for achieving this force is that, as shown in Figure 5B, the height H1 at which the hook portion 22143 protrudes from the arm portion 22141 is 1.53 to 1.62 mm. Therefore, if a user attempts to remove the movable closing connector 22 by pulling, the hook 22143 cannot be detached from the second engaging portion 2313 unless the pulling force exceeds 96.14 Newton meters. If a user attempts to remove the movable closing connector 22 by a less forceful means, the hook portion 22143 can be detached from the second engaging portion 2313 by pressing the arm portion 22141.

[0039] Due to the above technical features, it is difficult for the hook portion 22143 to be pulled out from the second engaging portion 2313, and it is necessary to press the arm portion 22141 to disengage the hook portion 22143 from the second engaging portion 2313, thereby achieving the following effects: Firstly, it can effectively prevent leakage caused by unintentional movement or related medical actions such as turning over in bed during use. Secondly, it can effectively prevent separation due to excessive movement during use, without causing liquid leakage or blood backflow. Third, after the movable closing connector 22 and the first needleless connector 23 are separated, they can be disinfected with alcohol and then assembled, reducing the time and cost of consumables for medical personnel. Fourth, it is generally applicable to use when a normal, independent patient receives an intravenous drip. Fifth, it applies to medical support for patients with unstable mental states and elderly individuals.

[0040] Notably, without the aforementioned technical features, the active closure connector 22 would be more prone to detachment, increasing the cost of additional medical equipment and healthcare personnel, raising the risk of bacterial infection in patients undergoing treatment, and potentially failing to achieve the expected medical outcomes, raising concerns about patient recovery.

[0041] In some embodiments, the force required to secure the hook 22143 to the second engagement portion is less than 96.14 Newton meters. The condition for achieving the above force is that the height H1 to which the hook portion 22143 protrudes from the arm portion 22141 is less than 1.53 mm. Therefore, if a user attempts to remove the movable closing connector 22 by pulling, the hook portion 22143 can be disengaged from the second engagement portion 2313 if the pulling force is less than 96.14 Newton meters. If a user attempts to remove the movable closing connector 22 by a less forceful means, the arm portion 22141 can be pressed, and the hook portion 22143 can be disengaged from the second engagement portion 2313. The above technical features provide the effect of being securely fixed to the first closing needleless connector module 21 while being easily removable.

[0042] As shown in Figures 3 and 6, the difference between the first closed-type needleless connector module 21A and the first closed-type needleless connector module 21 is: The first and second ends 2222 are Luer taper and are used for connecting to the syringe 200 (see Figures 1 and 6), Second, the connecting passage 2223 is provided with a large diameter section 22231 and a small diameter section 22232, Third, the first elastic valve 223 further comprises a plunger 2234, the first end of which is installed on the first end of the first sealing portion 2232, and the second end of which has a head 22341, the diameter of which is equal to the diameter of the small diameter portion 22232 and smaller than the diameter of the large diameter portion 22231.

[0043] As shown in Figure 6, when the movable closing connector 22 is aligned and connected to the first needleless connector 23, the head 22341 is positioned within the large-diameter portion 22231, creating a gap between it and the hole wall of the large-diameter portion 22231, thereby connecting the communication passage 2223 to the groove 22211. As shown in Figure 3, when the movable closing connector 22 and the first needleless connector 23 are separated, the head 22341 is positioned within the small-diameter portion 22232, but a distance is maintained between it and the inner surface of the small-diameter portion 22232 to maintain the smoothness of the communication passage 2223. Otherwise, the other technical features of the second chemical mixing device 20A are exactly the same as those of the second chemical mixing device 20.

[0044] As shown in Figures 1 and 5A, the puncture portion 11 of the second chemical mixing device 20A passes through the blocking portion 1412 of the second chemical mixing device 20A, thereby connecting the second chemical mixing device 20 and the second chemical mixing device 20A in series.

[0045] In some embodiments, multiple second chemical mixing devices 20, 20A can be connected to each other by the means of series connection described above, or multiple second chemical mixing devices 20 can be connected to each other by the means of series connection described above, or multiple second chemical mixing devices 20A can be connected to each other by the means of series connection described above, all of which are possible embodiments. In some embodiments, the infusion system may include only the second chemical mixing device 20 or the second chemical mixing device 20A.

[0046] As shown in Figure 1, the first end of the infusion set 30 passes through the shut-off section 1412 of the first drug mixer 10, thereby connecting the infusion set 30 to the second channel 131 via the third channel 1411 of the first drug mixer 10. As shown in Figures 1 and 6, the first end of the infusion set 30A passes through the shut-off section 1412 of the second drug mixer 20A, thereby connecting the infusion set 30A to the second channel 131 via the third channel 1411 of the second drug mixer 20A.

[0047] As shown in Figure 1, the distributor 40 comprises a collection unit 41, three injection terminals 42, 43, and 44, a discharge terminal 45, a second closed-type needleless connector module 21B, and a screw-type needleless connector module 46. These injection terminals 42, 43, and 44 are connected to the first terminal of the collection unit 41. The discharge terminal 45 is connected to the second terminal of the collection unit 41. The difference between the second closed-type needleless connector module 21B and the first closed-type needleless connector module 21A is: First, the first elastic valve 223 does not have a plunger 2234, Second, the second end 2222 is connected to the second end of the infusion set 30, Third, the second end portion 2322 is connected to the injection end portion 42.

[0048] The screw-type needleless connector module 46 comprises a screw-in section and a second needleless connector, the screw-in section being installed at the second end of the infusion set 30A, the second needleless connector having the same structure as the first needleless connector 23, the upper housing 2311 of the second needleless connector being screwed onto the screw-in section, and the second end 2322 of the second needleless connector being installed at the injection end 43. The injection end 44 is installed at the second end of the infusion set 30B. The operation of the second closed-type needleless connector module 21B and the first closed-type needleless connector module 21A is exactly the same.

[0049] As shown in Figures 4, 7A, and 7B, the separator 50 comprises a valve body 51, a screw structure 52, a discharge end 53, a third needleless connector 23B, and a third closed-type needleless connector module 21C. The valve body 51 is a three-way valve, with the female thread 521 of the screw structure 52 screwed onto the male thread 511 at the first end of the valve body 51. The screw structure 52 has an internal conduit 523, the first end of the discharge end 53 is installed at the second end of the valve body 51, and the second end 2322 is installed at the third end of the valve body 51.

[0050] The difference between the third closed-type needleless connector module 21C and the first closed-type needleless connector module 21A is: Firstly, the middle cylinder portion 22112 is installed inside the first end of the upper cylinder portion 22111, and the lower cylinder portion 22113 is installed outside the first end of the upper cylinder portion 22111, so that the middle cylinder portion 22112 extends into the interior of the lower cylinder portion 22113. Secondly, the conduit 2212 extends from inside the upper cylindrical portion 22111, through the middle cylindrical portion 22112, and into the lower cylindrical portion 22113. Third, the first engaging portion 2214 is a convex block, installed on the inner surface of the lower cylindrical portion 22113 and positioned below the middle cylindrical portion 22112, The fourth, second end 2322 is installed in a screw structure 52, the outer surface of the first end of the screw structure 52 has multiple claws 522, the second end of the screw structure 52 has a female screw 521, the bottom end of the second end 2322 is a ratchet, and its inner surface has multiple teeth 23223, and the structure of the third needleless connector 23B is exactly the same as that of the first needleless connector 23, The fifth and third openings 23222 are connected to the internal conduit 523.

[0051] As shown in Figure 7, when the movable closing connector 22 is aligned and connected to the first needleless connector 23, the first engaging portion 2214 is fixed to the bottom end of the second engaging portion 2313, with a force of 1.4 to 8.1 Newton meters (1 to 6 pounds per foot) fixing the first engaging portion 2214 to the second engaging portion 2313, and the first passage 22121 and the second passage 23311 communicate with the internal conduit 523. As shown in Figure 4, when the movable closing connector 22 is separated from the first needleless connector 23, the first engaging portion 2214 is detached from the bottom end of the second engaging portion 2313. Otherwise, the third closed needleless connector module 21C and the first closed needleless connector module 21A have exactly the same technical features.

[0052] As shown in Figure 1, the retaining needle 60 is installed at the second end of the discharge end 53.

[0053] The following describes how the infusion system performs the drug mixing procedure, which uniformly mixes the high-concentration drug solution in two vials (100, 100A) and syringe (200) with the diluent solution in two soft bags (300, 300A).

[0054] In step (1), remove these vials 100 and 100A containing a certain ingredient, as directed by the physician, and remove these soft bags 300 and 300A containing the powdered ingredient inside these vials 100 and 100A, as directed by the physician, and the diluent solution may be physiological saline or glucose solution.

[0055] As shown in Figure 1, vial 100 is fitted into vial adapter 122 of first chemical mixer 10, and insertion needle 1221 of first chemical mixer 10 pierces cap 110 of vial 100. As shown in Figure 5A, vial 100A is fitted into second end 2222 of first closed needleless connector module 21, and insertion needle 1221 of first closed needleless connector module 21 pierces cap 110 of vial 100A.

[0056] As shown in Figures 1 and 5A, the first ends of these puncture sites 11 pierce the membranes of the infusion tubes of the soft bags 300 and 300A, and the infusion set 30B directly pierces the membranes of the infusion tubes of the soft bag 300B.

[0057] In step (1-1), the soft bags 300 and 300A are positioned on top and the infusion system on the bottom, and the soft bag 300 is pushed out. The diluent solution in the soft bag 300 passes through the U-shaped through-hole 111, the first elongated hole 114, the first channel 1211 and the insertion needle 1221 of the first chemical mixer 10 and then enters the vial 100. The soft bag 300A is positioned on top and the infusion system on the bottom, and the soft bag 300A is pushed out. The diluent solution in the soft bag 300A passes through the U-shaped through-hole 111, the first elongated hole 114, the first channel 1211, the third opening 23222, the second passage 23311, the first passage 22121, these perforations 2233, grooves 22211, connecting passages 2223 and the insertion needle 1221 of the second chemical mixer 20 and then enters the vial 100A. By shaking these vials 100 and 100A, the powder inside these vials 100 and 100A is slightly mixed with the diluent to obtain a highly concentrated drug solution.

[0058] In step (2), the soft bags 300 and 300A are positioned at the bottom and the infusion system at the top. The soft bag 300 is pushed out, and the air inside the soft bag 300 passes through the U-shaped through-hole 111 and the first elongated hole 114, the first passage 1211 and the insertion needle 1221 of the first drug mixer 10 in sequence before entering the vial 100. The soft bag 300A is pushed out, and the air inside the soft bag 300A passes through the U-shaped through-hole 111, the first elongated hole 114, the first passage 1211, the third opening 23222, the second passage 23311, the first passage 22121, their perforations 2233, grooves 22211, connecting passages 2223 and the insertion needle 1221 of the second drug mixer 20 in sequence before entering the vial 100A.

[0059] In step (3), the soft bag 300 is loosened, and the high-concentration drug solution in vial 100 passes sequentially through the insertion needle 1221, first channel 1211, first elongated hole 114 and U-shaped through-hole 111 of the first drug mixing device 10 before entering the soft bag 300. As shown in Figure 5A, the soft bag 300A is loosened, and the high-concentration drug solution in vial 100A passes sequentially through the insertion needle 1221, connecting passage 2223, groove 22211, their perforations 2233, first passage 22121, second passage 23311, third opening 23222, first channel 1211, first elongated hole 114 and U-shaped through-hole 111 of the second drug mixing device 20 before entering the soft bag 300A.

[0060] As shown in Figure 6, the highly concentrated drug solution in syringe 200 passes sequentially through the connecting passage 2223, groove 22211, perforations 2233, first passage 22121, second passage 23311, third opening 23222, first flow path 1211, first elongated hole 114, U-shaped through-hole 111 of the second drug mixing device 20A, and the third flow path 1411, second flow path 131, second elongated hole 115, and side holes 112 of the second drug mixing device 20, before entering the interior of soft bag 300A.

[0061] By repeating steps (2) and (3), all of the highly concentrated drug solution in these vials 100, 100A and syringe 200 can be placed inside these soft bags 300, 300A, and the highly concentrated drug solution in these soft bags 300, 300A can be thoroughly mixed with the diluent to obtain diluted drugs.

[0062] Notably, during the drug mixing procedure, the distance D1 from the U-shaped through-hole 111 to the sharp end of the puncture site 11 is shorter than the distance D2 from the side hole 112 to the sharp end of the puncture site 11 (i.e., the distance between the U-shaped through-hole 111 and the sharp end of the puncture site 11 is close, and the distance between the side hole 112 and the sharp end of the puncture site 11 is far). Furthermore, the larger and longer the diameter of the puncture site 11, the smaller the gap through which the puncture site 11 is inserted into the infusion tube of the soft bags 300 and 300A, narrowing the fluid space, creating tension that prevents the flow of the drug solution, and achieving the effect of preventing high-concentration drug solutions from entering these side holes 112.

[0063] The following describes how the infusion system performs the infusion procedure, thereby delivering diluted medication into the patient's body.

[0064] In step (a), as shown in Figure 1, these soft bags 300, 300A, and 300B are positioned on top and the infusion system is positioned below, and the diluted drug in the soft bag 300 enters the interior of the collection unit 41 after passing in order through these side holes 112 of the first drug mixer 10, these second elongated holes 115, the second flow path 131, the third flow path 1411, the infusion set 30, the connecting passage 2223, groove 22211, these perforations 2233, the first passage 22121, the second passage 23311, the third opening 23222, and the injection end 42 of the first closed needleless connector module 21A.

[0065] As shown in Figures 1, 5A, and 6, the diluted drug in soft bag 300A passes through the side holes 112, the second elongated holes 115, the second channel 131, the third channel 1411 of the second drug mixer 20, the side holes 112, the second elongated holes 115, the second channel 131, the third channel 1411 of the second drug mixer 20A, the infusion set 30A, the threaded portion 461 of the threaded needleless connector module 46, the slit 23321 of the needleless connector, the second passage 23311, the third opening 23222, and the injection end 43 in sequence before entering the accumulation section 41. As shown in Figure 1, the other drug in soft bag 300B passes through the infusion set 30B and the injection end 44 in sequence before entering the accumulation section 41.

[0066] In step (b), as shown in Figures 1 and 7A, the three types of drugs are mixed inside the accumulation section 41, then pass through the discharge end 45, and enter the third closed-type needleless connector module 21C.

[0067] In step (c), as shown in Figures 1 and 7A, the mixed drug enters the patient's body after sequentially passing through the communication passage 2223, groove 22211, perforations 2233, first passage 22121, second passage 23311, third opening 23222, screw structure 52 of separator 50, valve body 51, discharge end 53, and indwelling needle 60 of the third closed needleless connector module 21C.

[0068] As a result, the U-shaped through-hole 111 and its side holes 112 are separated by the first partition wall 113, and the first flow path 1211 and the second flow path 131 are separated by the second partition wall 15. Therefore, in step (3), the high-concentration drug solution in the vial 100 passes only in sequence through the insertion needle 1221 of the first drug mixing device 10, the first flow path 1211, the first elongated hole 114 of the puncture section 11, and the U-shaped through-hole 111, and does not pass in sequence through the second flow path 131 of the first drug mixing device 10, its second elongated holes 115, and its side holes 112.

[0069] The highly concentrated drug solution in vial 100A passes only through the insertion needle 1221, connecting passage 2223, groove 22211, perforations 2233, first passage 22121, second passage 23311, third opening 23222, first flow path 1211, first elongated hole 114, and U-shaped through-hole 111 of the second drug mixing device 20 in sequence, and does not pass through the second flow path 131 of the second drug mixing device 20, its second elongated hole 115, or its side holes 112 in sequence. Therefore, the highly concentrated drug solution in these vials 100 and 100A does not adhere to the inner walls of the side holes 112 of the U-shaped through-hole 111 of the first drug mixing device 10 and the second drug mixing device 20 at all during the process of passing through them.

[0070] When step (2) is performed again, since no high-concentration chemical solution adheres to the inner walls of these side holes 112, even if the air inside these soft bags 300 and 300A passes through these side holes 112, no high-concentration chemical solution remains in the space between the second flow path 131 and the insertion hole 132.

[0071] Since no high-concentration drug solution remains in the space between the second channel 131 and the insertion hole 132, during the infusion procedure, only diluted drug can enter the patient's body after passing through the side holes 112, the second elongated holes 115, the second channel 131, the third channel 1411, the infusion set 30, 30A, the distributor 40, the separator 50, and the indwelling needle 60 in sequence. As a result, there is absolutely no problem of residual high-concentration drug solution entering the patient's body, the patient does not feel unwell, and the procedure is safe and reliable.

[0072] Furthermore, since no high-concentration drug solution remains in the space between the second channel 131 and the insertion hole 132, nurses do not need to drain any remaining high-concentration drug solution, the amount of drug injected into the patient's body does not decrease, it is in accordance with the doctor's instructions, the therapeutic effect can be maintained, and drug waste is avoided.

[0073] Furthermore, the first elongated holes 114 allow only the highly concentrated drug solution in vials 100 and 100A to pass into soft bags 300 and 300A, while the second elongated holes 115 allow only the diluted drug in soft bags 300 and 300A to pass into the patient's body. This prevents the diluted drug from flowing back into vials 100 and 100A, ensuring that the amount of drug solution injected into the patient's body is not reduced, aligning with the doctor's instructions, maintaining therapeutic effect, and preventing drug waste.

[0074] Furthermore, in the first closed-type needleless connector modules 21 and 21A, when the movable closing connector 22 is separated from the first needleless connector 23, both the movable closing connector 22 and the first needleless connector 23 have a closing effect, preventing leakage of the drug solution. Therefore, by removing the vial 100A and syringe 200 from the movable closing connector 22, the second drug mixing devices 20 and 20A can be reused repeatedly.

[0075] When medical professionals need to mix drugs multiple times, they can use the same second drug mixing device 20, 20A to load multiple vials 100A or multiple syringes 200 multiple times, mixing the drugs multiple times without needing to replace the second drug mixing device 20, 20A, thus saving costs. Of course, medical professionals can also connect multiple second drug mixing devices 20, 20A in series, load multiple vials 100A or multiple syringes 200 at once, and complete the above-mentioned multiple drug mixing procedure in one go, saving time. It should be noted that the movable closing connector 22 and the first needleless connector 23 must be disinfected before loading the vials 100A or syringes 200.

[0076] Furthermore, in the case of the second closed-type needleless connector module 21B, when the movable closing connector 22 is separated from the first needleless connector 23, both the movable closing connector 22 and the first needleless connector 23 have a closing effect, which prevents leakage of the chemical solution.

[0077] Furthermore, for the third closed-type needleless connector module 21C, the force with which the first engaging portion 2214 is fixed to the second engaging portion 2313 is 1.4 to 8.1 Newton meters (1 to 6 pounds per foot), which has the effect of being easily detached. Even if the patient moves on their own, the movable closed connector 22 and the first needle connector 23 are immediately detached to prevent leakage of medication and blood, and can be reused without replacement after disinfection with an alcohol swab. When the heights H2, H3, and H4 of the first engaging portion 2214 protruding from the lower cylinder portion 22113 are 0.05 mm, the force with which the first engaging portion 2214 is fixed to the second engaging portion 2313 is 2.7 Newton meters (2 pounds per foot). If the heights H2, H3, and H4 at which the first engaging portion 2214 protrudes from the lower cylindrical portion 22113 are 0.07 mm, the force that fixes the first engaging portion 2214 to the second engaging portion 2313 is 4.1 Newton meters.

[0078] If the heights H2, H3, and H4 of the first engaging portion 2214 protruding from the lower cylindrical portion 22113 are 0.1 mm, the force fixing the first engaging portion 2214 to the second engaging portion 2313 is 5.4 Newton-meters (4 pounds per foot). If the heights H2, H3, and H4 of the first engaging portion 2214 protruding from the lower cylindrical portion 22113 are 0.14 mm, the force fixing the first engaging portion 2214 to the second engaging portion 2313 is 8.1 Newton-meters (6 pounds per foot).

[0079] The important point is that because the groove walls of the groove 22211 are arc-shaped, the chemical solution can flow along the arc-shaped groove walls of the groove 22211 in a way that prevents the generation of vortices, thereby increasing the flow velocity of the chemical solution.

[0080] Notably, because the diameter of the groove 22211 is larger than the diameter of the first sealing portion 2232, even when the first circumferential portion 2231 is compressed and deformed, and the first sealing portion 2232 approaches the groove 22211, the groove 22211 remains smoothly connected to and unaffected by these perforations 2233.

[0081] Furthermore, the upper housing 2311 of the third needleless connector 23B is Luer taper and is used to connect to the syringe 200. This allows medical personnel to take blood samples from the second end of the valve body 51 or add non-toxic general drugs via the third needleless connector 23B of the separator 50.

[0082] In some embodiments, the valve body 51 may have a female Luer taper.

[0083] When the first needleless connector 23 is rotated along the first direction by the first rotational force, the first needleless connector 23 sequentially transmits the first rotational force to the screw structure 52 through its teeth 23223 and its claws 522. As the screw structure 52 is rotated along the first direction by the first rotational force, the screw structure 52 is fixed to the first end of the valve body 51.

[0084] After the screw structure 52 is fixed to the first end of the valve body 51, when the first needleless connector 23 is rotated by a second rotational force along a second direction opposite to the first direction, the first needleless connector 23 causes the second rotational force to push these claws 522 through their teeth 23223, causing these claws 522 to be compressed and deformed, disengaged from their teeth 23223, and the first needleless connector 23 spins freely along the second direction relative to the screw structure 52. In this case, the screw structure 52 remains fixed to the first end of the valve body 51, and the first needleless connector 23 has no way of driving the screw structure 52 to rotate in the second direction.

[0085] After the screw structure 52 is fixed to the first end of the valve body 51, when the first needleless connector 23 is rotated along the first direction by a third rotational force, the first needleless connector 23 transmits the third rotational force to its claws 522 via its teeth 23223. When the third rotational force is greater than the force that these claws 522 can withstand, these claws 522 break, allowing the screw structure 52 to rotate freely along the first and second directions relative to the first needleless connector 23, and enabling the liquid chemical in the discharge end 53 to flow smoothly.

[0086] As shown in Figure 8, the difference between the first closed-type needleless connector module 21A1 and the first closed-type needleless connector module 21A is that the lower cylindrical portion 22113 is longer.

[0087] As shown in Figures 9A and 9B, the structural difference between the third closed-type needleless connector module 21D and the third closed-type needleless connector module 21C is: First, the cylindrical portion 2211A of the movable closing connector 22A comprises only an upper cylindrical portion 22111A and a lower cylindrical portion 22113A. The second joint 232A is integrally molded with the screw structure 52, Third, the first needleless connector 23C is equipped with a connecting pipe 234, which is installed inside the housing and comprises an upper column 2341, a large-diameter portion 2342, and a lower column 2343.

[0088] The upper column 2341 is installed below the large-diameter section 2342, with a closed top end and a through-hole (not shown) that penetrates the side wall of the upper column 2341 and communicates with the interior of the upper column 2341. The lower column 2343 is installed below the large-diameter section 2342, with an open bottom end, and the interiors of the upper column 2341 and the large-diameter section 2342 communicate with the interior of the lower column 2343. Fourth, the first needleless connector 23C is equipped with a third elastic valve 235, which is installed within the housing 231A and has a third ring portion 2351 and a third sealing portion 2352. The third ring portion 2351 is provided around the outside of the upper column 2341, with its bottom end in contact with the large diameter portion 2342, and the third sealing portion 2352 is provided at the top end of the third ring portion 2351 and has a slit 2353. Fifth, the first needleless connector 23C is equipped with a fourth elastic valve 236, which is installed in the housing 231A and has a fourth ring portion 2361 and a fourth sealing portion 2362. The fourth ring portion 2361 is provided around the outside of the lower column 2343, with its top end abutting against the large diameter portion 2342, and the fourth sealing portion 2362 is installed at the bottom end of the fourth ring portion 2361 and abutting against the inner wall of the second coupling portion 232A. The lower housing 2312A presses against the top end of the fourth sealing portion 2362, and the fourth sealing portion 2362 is provided with a slit 2363 aligned with the inside of the lower column 2343 and the third opening 23222, Sixth, the lower cylindrical portion 22113A is provided with two grooves 22116.

[0089] As shown in Figures 9C, 9D, and 9E, the difference in the alignment and connection method between the third closed-type needleless connector module 21D and the third closed-type needleless connector module 21C is as follows: Firstly, the upper column 2341 widens the slit 2353 of the third seal portion 2352, presses against the upper first seal portion 2232, compresses it, passes through the first opening 22122, and enters the interior of the conduit 2212. The conduit 2212 compresses the third seal portion 2352, and the third seal portion 2352 compresses the third ring portion 2351, thereby exposing the perforation of the upper column 2341 to the outside of the third seal portion 2352 and positioning it inside the conduit 2212. The second and third annular portions 2351 press against the large-diameter portion 2342, the large-diameter portion 2342 compresses the fourth annular portion 2361, and the lower column 2343 widens the slit 2363 of the fourth sealing portion 2362 and enters the third opening 23222, thereby connecting the first passage 22121 and the connecting pipe 234 to the internal conduit 523.

[0090] As shown in Figures 9A and 9B, the difference in the separation method between the third closed-type needleless connector module 21D and the third closed-type needleless connector module 21C is: The first and fourth annular portions 2361, by their elastic force, press against the large-diameter portion 2342, thereby moving the connecting pipe 234 and the third elastic valve 235, and the lower column 2343 returns to the interior of the fourth annular portion 2361, thereby sealing the slit 2363 of the fourth sealing portion 2362. The second and third annular portions 2351, through their elastic force, press against the conduit 2212, thereby moving the movable closing connector 22A, which causes the upper column 2341 to detach from the conduit 2212 and return to the third annular portion 2351. Third, the conduit 2212 detaches from the third seal portion 2352, thereby sealing the slit 2353 of the third seal portion 2352, and the third seal portion 2352 returns to its original position due to the elastic force of the third circumferential portion 2351, thereby closing the second opening 23111. Fourth, the upper housing 2311A separates from the lower cylindrical portion 22113A, and the first sealing portion 2232 returns to its original position due to its elastic force, so that the second end of the first sealing portion 2232 closes the first opening 22122.

[0091] As shown in Figures 10A, 10B, 10C, and 10D, the structural difference between the third closed-type needleless connector module 21E and the third closed-type needleless connector module 21D is: Firstly, the first engaging portion 2214A is cut to form a plurality of convex blocks with short arc lengths, Secondly, the lower cylindrical portion 22113B of the movable closing connector 22B does not have a groove.

[0092] In some embodiments, there may be only one first engaging portion 2214A.

[0093] In some embodiments, as shown in Figures 11A and 11B, the two movable closing connectors 22 of the first closed needleless connector module 21A are installed on one end of the syringe 200 and the first and second ends of the valve body 51, respectively, the first needleless connector 23 of the first closed needleless connector module 21A is installed on the third end of the valve body 51, the chuck 70 is installed on one end of one of the first needleless connectors 23, and the puncture head 80 is installed on the other end of the first needleless connector 23. These embodiments are suitable for an automated drug dispenser system.

[0094] In some embodiments, as shown in Figures 12A and 12B, the syringe 200 is integrally molded with two types of movable closing connectors 22. Since the syringe 200 and the movable closing connector 22 are integrally molded, the combination of syringe 200 and movable closing connector 22 can be mass-produced, reducing manufacturing costs such as resource waste from the use of sterile packaging bags and carbon emissions from sterilization. Users do not need to assemble additional parts (for example, applicable to combinations of syringe 200 and movable closing connector 22 of various milliliter sizes) when using the product, saving time, providing uniformity, and making operation more convenient.

[0095] In some embodiments, as shown in Figures 13A, 13B, and 13C, the structural differences between the third closed-type needleless connector module 21F and the third closed-type needleless connector module 21D are as follows: The first and second joint portions 232B have stabilizing members 2314 on their outsides, Second, the second engaging portion 2313 is installed on the outer surface of the second connecting portion 232B, The third, third closed-type needleless connector module 21F further comprises a balanced pressure valve 90 installed between the second end 2322 of the second coupling portion 232B of the first needleless connector 23D and the screw structure 52.

[0096] Preferably, the second end portion 2322 forms a chamber 23224, a bowl-shaped groove 524 is formed in the center of the top of the screw structure 52, and the balanced pressure valve 90 is installed inside the chamber 23224 and comprises a valve body 91 and a fixing portion 92. The valve body 91 is hemispherical, located inside the bowl-shaped groove 524, has a slit 911, and has a bent portion 913 formed on its outside. The fixing portion 92 is circumferentially provided on the outside of the bent portion 913 of the valve body 91, the top of the fixing portion 92 abuts against the bottom of the second end portion 2322, the side wall abuts against the inner wall of the chamber 23224, and the bottom abuts against the top of the screw structure 52.

[0097] As shown in Figures 13D, 13E, and 13F, the syringe 200 is connected to the first joint 222, the tube 400 is connected to the screw structure 52, and the internal conduit 523 extends into the tube 400. When the syringe 200 injects the drug solution into the human body via the separator 50 and the tube 400, the syringe 200 provides positive pressure, and under the influence of this positive pressure, the drug solution is concentrated in the internal space of the hemispherical valve body 91, and more of the drug solution moves and is stored. When the bent portion 913 of the hemispherical valve body 91 can no longer withstand the positive pressure, it is forced by the drug solution to move gradually, opening the slit 911, allowing the drug solution to pass through the slit 911 and the internal conduit 523 into the tube 400.

[0098] As shown in Figures 13G and 13H, after the syringe 200 is removed from the first joint 222, the connecting tube 234, the third elastic valve 235, and the fourth elastic valve 236 return to their original positions to provide negative pressure. During the process of the third and fourth elastic valves 235 and 236 returning under the influence of negative pressure, the portion of the drug solution that originally filled the inside of the hemispherical valve body 91 still flows out through the slit 91 toward the discharge end until it closes and a constant pressure effect is achieved. The opening is then closed to prevent backflow of the drug solution and blood.

[0099] As shown in Figures 13I and 13J, when the syringe 200 extracts excess drug solution through the separator 50 and the long tube 400, the syringe 200 provides negative pressure, and the slit 911 is opened due to the negative pressure, allowing the excess drug solution to pass through and enter the syringe 200 via the separator 50 without damaging the blood sample during blood collection.

[0100] Even if the medication bag falls during intravenous fluid administration, the patient coughs, or the medication bag becomes lower than the patient's body, the equilibrium pressure valve 90 can prevent blood backflow.

[0101] In some embodiments, as shown in Figures 14A, 14B, and 14C, the structural difference between the third closed needleless connector module 21G and the third closed needleless connector module 21F is that the check valve 90A replaces the balanced pressure valve 90.

[0102] Specifically, an upper chamber 23225 is formed at the second end 2322 of the second coupling portion 232C of the first needleless connector 23E, a lower chamber 525 is formed at the screw-fastening structure 52, and the check valve 90A comprises a valve body 91A, a fixing portion 92A, and a stopper 93. The valve body 91A is located inside the lower chamber 525 and has a through hole 912. The top of the fixing portion 92 abuts against the bottom of the second end portion 2322, its side wall abuts against the inner wall of the lower chamber 525, and its bottom abuts against the top of the screw-fastening structure 52. The stopper 93 is installed inside the upper chamber 23225.

[0103] As shown in Figures 14D and 14E, the syringe 200 is connected to the first joint 222, the tube 400 is connected to the screw structure 52, and the internal conduit 523 extends into the tube 400. When the syringe 200 injects the drug solution into the human body via the separator 50 and the tube 400, the syringe 200 provides positive pressure, and the valve body 91A is separated from the stopper 93 by the positive pressure, so that the stopper 93 no longer closes the through-hole 912, and the drug solution passes through the through-hole 912 and the internal conduit 523 into the tube 400.

[0104] As shown in Figures 14F and 14G, after the syringe 200 is removed from the first joint 222, the connecting tube 234, the third elastic valve 235, and the fourth elastic valve 236 return to their original positions to provide negative pressure, and the valve body 91A is affected by the negative pressure and comes into contact with the stopper 93, which closes the through-hole 912 to prevent backflow of the drug solution and blood.

[0105] As shown in Figures 15A, 15B, and 15C, the structural difference between the third closed-type needleless connector module 21H and the third closed-type needleless connector module 21F is: Firstly, the housing 231A and the second coupling portion 232B of the first needleless connector 23F are integrally molded, The outer wall of the second joint 232B has multiple anti-slip ribs 2323 to prevent user error, Third, inside the second end portion 2322 of the second joint portion 232B, there is a block 2324 in which a third opening 23222 is provided, Fourth, the screw structure 52 has a lower chamber 525 formed within it, the valve body 91 is located inside the lower chamber 525, the top of the fixing part 92 abuts against the bottom of the block 2324, the side wall abuts against the inner wall of the lower chamber 525, and the bottom abuts against the top of the screw structure 52.

[0106] In some embodiments, the balanced pressure valve 90 of the third closed-type needleless connector module 21H can be replaced with a check valve 90A.

[0107] In some embodiments, the check valve 90A replaces the balanced pressure valve 90. Specifically, the screw structure 52 has a lower chamber 525, and the check valve 90A comprises a valve body 91A, a fixing part 92A, and a stopper 93. The valve body 91A is located inside the lower chamber 525 and has a through hole 912. The stopper 93 is integrally molded with the block 2324.

[0108] As shown in Figure 16A, the structural difference between the movable closing connector 22C of the third closed-type needleless connector module 21I and the movable closing connector 22B of the third closed-type needleless connector module 21E is that the first engaging portion 2214A can be installed at the bottom of the movable closing connector 22C, close to the lower cylindrical portion 22113C. In other words, the first engaging portion may be installed at any position on the lower cylindrical portion of the movable closing connector.

[0109] As shown in Figure 16A, the structural difference between the first needleless connector 23G of the third closed-type needleless connector module 21I and the first needleless connector 23F of the third closed-type needleless connector module 21H is that the first needleless connector 23G is equipped with a connecting pipe 234A and a fifth elastic valve 237. The connecting pipe 234A is installed inside the second coupling part 232B, is conical in shape, has a closed end at its apex, and is provided with a through hole (not shown) which penetrates the side wall of the connecting pipe 234A and communicates with the inside of the connecting pipe 234A, and the bottom end of the connecting pipe 234A is a block 2324. The fifth elastic valve 237 is installed inside the second coupling part 232B and has a fifth circumferential part 2371 and a fifth sealing part 2372.

[0110] As shown in Figure 16B, the difference in the alignment connection method between the third closed-type needleless connector module 21E and the third closed-type needleless connector module 21F is that the connecting pipe 234A widens the slit 2373 (see Figure 16A) of the fifth seal portion 2372, presses against and compresses the first seal portion 2232, and after passing through the first opening 22122 and entering the interior of the conduit 2212, the conduit 2212 compresses the fifth seal portion 2372, and the fifth ring portion 2371 is not deformed.

[0111] Of particular note is that the connecting pipe 234 of the first needleless connectors 23C to 23F is movable, while the connecting pipe 234A of the first needleless connector 23G is fixed. In other words, any form of movable closing connector 22A, 22B, 22C can be applied to the movable or fixed connecting pipes 234, 234A of the first needleless connectors 23C to 23G.

[0112] In this invention, the term "medical device" is used to refer to any medical device commonly used in the medical field, and can be used for connection or coupling with any different form of the connector other than those disclosed in this invention, as well as with other connector devices related to medical applications.

[0113] The foregoing is for illustrative purposes only to illustrate preferred embodiments of the present invention and does not constitute any formal limitation to the invention. Any modifications or changes to the invention made in the spirit of the invention are all within the scope of the intended protection of the invention. [Explanation of symbols]

[0114] 10. First chemical mixing apparatus 11 Puncture site 111 U-shaped through hole 112 Side hole 113 1st bulkhead 114 1st long hole 115 2nd long hole 12 Connection part 121 Connector mounting base 1211 First channel 122 Vial Adapter 1221 Insertion needle 13 Discharge section 131 Second channel 132 Through hole 14 Plug connectors 141 Body 1411 Third channel 1412 Blocking section 15 Second bulkhead 20, 20A Second chemical mixing apparatus 21, 21A, 21A1 First Closed-Type Needleless Connector Module 21B Second Closed Type Needleless Connector Module 21C, 21D, 21E, 21F, 21G, 21H, 21I Third Closed Type Needleless Connector Module 22, 22A, 22B, 22C Movable closing connectors 221 Main Unit 2211, 2211A cylinder part 22111, 22111A Upper cylinder part 22112 Middle cylinder part 22113, 22113A, 22113B, 22113C Lower cylinder part 22114 First through hole 22115 Second through hole 22116 Groove 2212 Conduit 22121 1st aisle 22122 First opening 2213 Positioning section 2214, 2214A 1st engagement part 22141 Arm section 22142 Connecting part 22143 Hook part 222 1st joint 2221 First end 22211 Recessed groove 2222 Second end 2223 Communication path 22231 Large diameter section 22232 Small diameter section 223 First Elastic Valve 2231 1st ring circumferential part 2232 First seal section 2233 Perforation 2234 Plunger 22341 Head 23, 23C, 23D, 23E, 23F, 23G First Needleless Connector 23B Third Needleless Connector 231, 231A Housing 2311, 2311A Upper Housing 23111 Second opening 2312, 2312A Lower Housing 2313 Second engaging part 2314 Stabilizing member 232, 232A, 232B, 232C 2nd joint 2321 First end 2322 Second end 23222 Third opening 23223 Dental Department 23224 Chamber 23225 Upper Chamber 2323 Anti-slip ribs 2324 blocks 233 Second Elastic Valve 2331 Second ring part 23311 2nd aisle 2332 Second seal section 23321 Slit 234, 234A communication pipe 2341 Upper columnar body 2342 Large diameter section 2343 Lower column 235 Third Elastic Valve 2351 Third ring part 2352 Third seal section 2353 Slit 236. Fourth Elastic Valve 2361 4th ring part 2362 Fourth seal section 2363 Slit 237 Fifth Elastic Valve 2371 Fifth ring part 2372 Fifth seal section 2373 Slit 30, 30A, 30B Infusion Set 40 distributor 41. Accumulation section 42, 43, 44 Injection end 45 Discharge end 46 Screw-type needleless connector module 50 Separators 51 Valve body 511 Male screw 52 Screw structure 521 Female thread 522 Nails 523 Internal conduit 524 Bowl-shaped groove 525 Lower Chamber 53 Discharge end 60 Indwelling needles 70 Chuck 80 puncture heads 90 Balance pressure valve 90A Check Valve 91, 91A valve body 911 Slit 912 Through-hole 913 Bend section 92, 92A fixed part 93 Stopper 100, 100A vials 110 Cap 200 syringe 300, 300A, 300B Soft Bags 400 long tube D1, D2 distance H1, H2, H3, H4 Length

Claims

1. It is a separator that easily falls off, Valve body and, The female thread at the first end is screwed onto the male thread at the first end of the valve body, and is defined as the injection end of the separator, and has a screw structure with an internal conduit, The first end of the discharge end is installed at the second end of the valve body, It comprises an engagement-type needleless connector module, The aforementioned engagement-type needleless connector module comprises a movable closing connector and a needleless connector, The movable closing connector comprises a body, a first coupling portion, and a first elastic valve, the body comprising a cylindrical portion, a conduit, a positioning portion, and a first engaging portion, the conduit being installed inside the cylindrical portion and having a first passage and a first opening, the positioning portion being located inside the cylindrical portion and installed outside the conduit, the first engaging portion being a convex block installed on the cylindrical portion, the first coupling portion being installed on the cylindrical portion, the first elastic valve comprising a first ring portion and a first sealing portion, both ends of the first ring portion being installed on the positioning portion and the first coupling portion, respectively, the first sealing portion being located inside the first passage, its first end being connected to the inner surface of the first ring portion and having a plurality of perforations communicating with the first passage, its second end closing the first opening, The needleless connector comprises a housing, a second coupling portion, and a second elastic valve, wherein the housing has a second engaging portion, the second engaging portion being a convex block installed on the outer surface of the housing or the outer surface of the second coupling portion, the first end of the housing has a second opening, the second coupling portion is installed on the second end of the housing and has a third opening, and is screwed into the screw structure, the third opening is in communication with the internal conduit, the second elastic valve comprises a second ring portion and a second sealing portion, the second ring portion is installed inside the housing and the second coupling portion and has a second passage, the second passage is in communication with the third opening, the third opening is in communication with the internal conduit, the second sealing portion is installed inside the housing and has a slit, and closes the second opening. When the movable closing connector is aligned and connected to the needleless connector, the first engaging portion is fixed to the second engaging portion, and the force with which the first engaging portion is fixed to the second engaging portion is 1.4 to 8.1 Newton meters, the conduit compresses the second sealing portion, and the second sealing portion compresses the second ring portion, thereby separating the second sealing portion from the second opening, the conduit passes through the slit of the second sealing portion and enters the interior of the second sealing portion, the first end of the housing abuts against the inner wall of the cylindrical portion, and the positioning portion moves along the conduit in a direction away from the needleless connector and compresses the first ring portion, thereby separating the second end of the first sealing portion from the first opening, and the first passage and the second passage communicate with the internal conduit. When the movable closing connector is separated from the needleless connector, the first engaging portion disengages from the second engaging portion, and the conduit disengages from the second sealing portion, thereby sealing the slit of the second sealing portion. The second sealing portion returns to its original position due to the elastic force of the second ring portion, closing the second opening. The first end of the housing disengages from the cylindrical portion, and the positioning portion and the first sealing portion return to their original positions due to the elastic force of the first ring portion, causing the second end of the first sealing portion to close the first opening. A bowl-shaped groove and space are formed in the center of the top of the aforementioned screw structure. The present invention further comprises a balancing pressure valve installed in the space between the second coupling portion and the bowl-shaped groove of the screw structure, The aforementioned balance pressure valve is equipped with a semi-spherical valve body. The flow path from the injection end to the discharge end is straight. A separator that easily falls off.

2. The cylindrical portion comprises an upper cylindrical portion, a middle cylindrical portion, and a lower cylindrical portion. The middle cylinder is installed inside the first end of the upper cylinder, and the lower cylinder is installed outside the first end of the upper cylinder, so that the middle cylinder extends into the interior of the lower cylinder. The conduit extends from inside the upper cylindrical portion, through the inside of the middle cylindrical portion, and into the inside of the lower cylindrical portion; the positioning portion is located inside the upper cylindrical portion; the first engaging portion is installed on the inner surface of the lower cylindrical portion and located below the middle cylindrical portion; and the first connecting portion is installed at the second end of the upper cylindrical portion. The housing comprises an upper housing and a lower housing, wherein the first end of the upper housing has the second opening, the outer diameter of the upper housing is smaller than the outer diameter of the lower housing, and the second engaging portion is installed on the outer surface of the first end of the lower housing. When the movable closing connector is aligned and connected to the needleless connector, the first engaging portion is fixed to the bottom end of the second engaging portion, and the first end of the upper housing abuts against the inner wall of the central cylinder portion. A separator that easily falls off, as described in claim 1.

3. When the height to which the first engaging portion protrudes from the lower cylindrical portion is 0.05 mm, the force that fixes the first engaging portion to the second engaging portion is 2.7 Newton meters. When the height to which the first engaging portion protrudes from the lower cylindrical portion is 0.07 mm, the force that fixes the first engaging portion to the second engaging portion is 4.1 Newton meters. When the height to which the first engaging portion protrudes from the lower cylindrical portion is 0.1 mm, the force that fixes the first engaging portion to the second engaging portion is 5.4 Newton meters. When the height to which the first engaging portion protrudes from the lower cylindrical portion is 0.14 mm, the force with which the first engaging portion fixes the second engaging portion is 8.1 Newton meters. A separator that easily falls off, as described in claim 2.

4. It is a separator that easily falls off, Valve body and, The female thread at the first end is screwed onto the male thread at the first end of the valve body, and is defined as the injection end of the separator, and has a screw structure with an internal conduit, The first end of the discharge end is installed at the second end of the valve body, It comprises an engagement-type needleless connector module, The aforementioned engagement-type needleless connector module comprises a movable closing connector and a needleless connector, The movable closing connector comprises a body, a first coupling portion, and a first elastic valve, the body comprising a cylindrical portion, a conduit, a positioning portion, and a first engaging portion, the conduit being installed inside the cylindrical portion and having a first passage and a first opening, the positioning portion being located inside the cylindrical portion and installed outside the conduit, the first engaging portion being a convex block installed on the cylindrical portion, the first coupling portion being installed on the cylindrical portion, the first elastic valve comprising a first circumferential portion and a first sealing portion, one end of the first circumferential portion being installed on the positioning portion, the first sealing portion being located in the first passage, its first end being connected to the inner surface of the first circumferential portion and having a plurality of perforations communicating with the first passage, and its second end closing the first opening, The needleless connector comprises a housing, a second coupling portion, a communication pipe, a third elastic valve, and a fourth elastic valve, wherein the housing or the second coupling portion has a second engaging portion, the second engaging portion is a convex block installed on the outer surface of the housing or the outer surface of the second coupling portion, the first end of the housing has a second opening, the second coupling portion is installed on the second end of the housing and has a third opening, and is integrally molded with the screw structure, the third opening communicates with the internal conduit, the communication pipe is installed inside the housing, and comprises an upper column, a large diameter portion, and a lower column, wherein the upper column is installed above the large diameter portion and its top end is a closed end and is provided with at least one through hole, the at least one through hole penetrates the side wall of the upper column and communicates with the interior of the upper column, and the lower column is the large diameter portion The third elastic valve is installed below, its bottom end being an open end, the interior of the upper column and the interior of the large diameter portion communicating with the interior of the lower column, the third elastic valve is installed in the housing and has a third ring portion and a third seal portion, the third ring portion is provided around the outside of the upper column and its bottom end abuts against the large diameter portion, the third seal portion is provided at the top end of the third ring portion and has a slit, the fourth elastic valve is installed in the housing and has a fourth ring portion and a fourth seal portion, the fourth ring portion is provided around the outside of the lower column and its top end abuts against the large diameter portion, the fourth seal portion is provided at the bottom end of the fourth ring portion and abuts against the inner wall of the second joint, the second end of the housing presses against the top end of the fourth seal portion, the fourth seal portion has a slit aligned with the interior of the lower column and the third opening, When the movable closing connector is aligned and connected to the needleless connector, the first engaging portion is fixed to the second engaging portion, and the force with which the first engaging portion is fixed to the second engaging portion is 1.4 to 8.1 Newton meters, the upper column widens the slit of the third seal portion and presses against the first seal portion, compressing it, passing through the first opening and entering the conduit, the conduit compresses the third seal portion, and the third seal portion compresses the third ring portion, thereby exposing at least one perforation of the upper column to the outside of the third seal portion and positioning it inside the conduit, the third ring portion presses against the large diameter portion, the large diameter portion compresses the fourth ring portion, and the lower column widens the slit of the fourth seal portion and enters the third opening, thereby connecting the first passage and the connecting pipe to the inner conduit, When the movable closing connector is separated from the needleless connector, the first engaging portion disengages from the second engaging portion, the fourth ring portion moves the communication pipe and the third elastic valve by pressing against the large diameter portion due to its elastic force, the lower column returns to the interior of the fourth ring portion, thereby sealing the slit of the fourth seal portion, the third ring portion moves the movable closing connector by pressing against the conduit due to its elastic force, the upper column returns to the third ring portion and disengages from the conduit, the conduit disengages from the third seal portion, thereby sealing the slit of the third seal portion, the third seal portion returns to its original position due to the elastic force of the third ring portion and closes the second opening, the first end of the housing disengages from the cylindrical portion, and the first seal portion returns to its original position due to its elastic force, causing the second end of the first seal portion to close the first opening. A bowl-shaped groove and space are formed in the center of the top of the aforementioned screw structure. The present invention further comprises a balancing pressure valve installed in the space between the second coupling portion and the bowl-shaped groove of the screw structure, The aforementioned balance pressure valve is equipped with a semi-spherical valve body. The flow path from the injection end to the discharge end is straight. A separator that easily falls off.

5. The cylindrical portion comprises an upper cylindrical portion and a lower cylindrical portion. The lower cylindrical portion is installed on the outside of the first end of the upper cylindrical portion, the conduit extends from the inside of the upper cylindrical portion to the inside of the lower cylindrical portion, the positioning portion is located inside the upper cylindrical portion, the first engaging portion is installed on the inner surface of the lower cylindrical portion, and the first connecting portion is installed at the second end of the upper cylindrical portion. The housing comprises an upper housing and a lower housing, wherein the first end of the upper housing has the second opening, the lower housing presses against the top end of the fourth seal portion, and the second engaging portion is installed on the outer surface of the first end of the lower housing. When the movable closing connector is aligned and connected to the needleless connector, the first engaging portion is fixed to the bottom end of the second engaging portion. A separator that easily falls off, as described in claim 4.

6. When the height to which the first engaging portion protrudes from the lower cylindrical portion is 0.05 mm, the force that fixes the first engaging portion to the second engaging portion is 2.7 Newton meters. When the height to which the first engaging portion protrudes from the lower cylindrical portion is 0.07 mm, the force that fixes the first engaging portion to the second engaging portion is 4.1 Newton meters. When the height to which the first engaging portion protrudes from the lower cylindrical portion is 0.1 mm, the force that fixes the first engaging portion to the second engaging portion is 5.4 Newton meters. When the height to which the first engaging portion protrudes from the lower cylindrical portion is 0.14 mm, the force with which the first engaging portion fixes the second engaging portion is 8.1 Newton meters. A separator that easily falls off, as described in claim 5.

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