Special pipetting connector for Ruhr interface and closed dispensing pipettor and dispensing pipetting system thereof

Abstract

The utility model discloses a special pipetting connector for a Luer interface and a closed dispensing and pipetting device and a dispensing and pipetting system of the special pipetting connector, and relates to the field of medical dispensing and pipetting devices. According to the pipetting connector, the hollow cavity is formed in the pipetting connector, the Luer taper is arranged at the top of the pipetting connector, the bottom of the hollow cavity is open and provided with the sealing plug, when the pipetting connector is used, a needle head sealing assembly can abut against the sealing plug, a medicine dispensing needle can penetrate out of the needle head sealing assembly and the sealing plug at the same time, and liquid medicine is discharged through the hollow cavity and the Luer taper; therefore, the pipetting connector is connected to injection equipment with a Luer interface, the pipetting connector is further provided with a clamping structure, and the needle head sealing assembly can be detachably connected to the pipetting connector, so that the use stability and accuracy of the pipetting connector are ensured.

Description

Technical Field

[0001] The utility model relates to the field of medical dispensing and liquid transfer devices, in particular to a liquid transfer connector specially used for a Luer interface and a closed dispensing pipette and a dispensing and liquid transfer system thereof. Background Art

[0002] Dangerous drugs, represented by chemotherapy drugs, pose a great threat to the health of medical staff who have been engaged in the preparation and transportation of such drugs for a long time, such as causing cancer, damage to internal organs, DNA damage, reproductive problems, miscarriage and teratogenesis.

[0003] The Chinese patent with publication number CN115607444A discloses a closed drug liquid transfer device and drug liquid transfer system with double chamber internal circulation. In this drug liquid transfer device, the dispensing needle is wrapped by the needle sealing component in the initial state. When in use, the needle sealing component is abutted against the bottle mouth of the container, and the dispensing needle can pass through the needle sealing component and the bottle mouth of the container at the same time, so as to achieve no leakage of drug liquid.

[0004] However, after the medication is prepared, the liquid medicine transfer device needs to be connected to an injection device such as a chemotherapy pump, which often uses a standard connector. Therefore, the closed liquid medicine transfer device cannot be connected to these standard connectors on a leak-proof basis. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a pipetting connector specially used for Luer interface and closed dispensing pipette and its dispensing pipetting system, which can be connected to these standard Luer interfaces on the one hand and to the closed dispensing pipette on the other hand on the basis of sealing and leak-proofing.

[0006] In the first aspect, in order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A pipetting connector specially used for a Luer interface and a closed medicine dispensing pipette, comprising a connector body, wherein a hollow cavity is arranged inside the connector body, a Luer joint connected to the hollow cavity is arranged on the top of the connector body, an open mouth of the hollow cavity is arranged at the bottom of the connector body, a sealing plug for sealing the open mouth is arranged in the open mouth, and a clamping structure is also arranged at the bottom of the connector body, wherein the clamping structure is used to detachably fix the connector body to the closed medicine dispensing pipette.

[0008] The above-mentioned pipetting connector preferably has a radial dimension of the bottom of the hollow cavity that is larger than the radial dimension of the inner cavity of the Luer connector.

[0009] The above-mentioned liquid transfer connector preferably has an outer edge of the open mouth provided with a mounting groove, the sealing plug is cooperatively arranged in the mounting groove, and the radial dimension of the mounting groove is larger than the radial dimension of the open mouth.

[0010] The above-mentioned pipetting connector preferably has an annular groove on the upper end surface of the sealing plug, and an annular convex strip on the assembly groove, and the height of the annular convex strip is greater than the depth of the annular groove, so that when the sealing plug is installed in the assembly groove, the top of the annular convex strip abuts against the bottom of the annular groove.

[0011] The above-mentioned liquid transfer connector preferably has a sealing cover at the bottom of the connector body, the sealing cover is arranged at the bottom of the sealing plug, and the sealing cover is axially provided with a through hole so that the sealing plug is exposed through the through hole.

[0012] The above-mentioned pipetting connector preferably has a sealing cover at the bottom of the connector body, a slope as a clamping structure is circumferentially arranged on the outer edge of the sealing cover, a limiting block is arranged at the thicker part of the slope, and two slopes are symmetrically arranged about the axial direction.

[0013] The above-mentioned pipetting connector preferably has two holding wings arranged on the outer side of the connector body, each of the holding wings is connected to the bottom of the connector body and extends axially, and each of the holding wings is symmetrically arranged about the axial direction; each of the holding wings is respectively provided with a raised strip extending radially on the outer side; each of the holding wings is provided with a longitudinally extending reinforcing plate, and the reinforcing plates are respectively connected to the holding wing and the connector body.

[0014] The above-mentioned pipetting connector preferably has an internal threaded connection sleeve disposed on the outer side of the Luer connector.

[0015] In the second aspect, in order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0016] A dispensing and liquid transfer system, comprising the above-mentioned liquid transfer connector, and also comprising a liquid medicine transfer device, wherein the liquid medicine transfer device comprises a double-chamber syringe, a dispensing needle assembly and a needle sealing assembly;

[0017] The double-chamber syringe is composed of a first syringe and a first piston rod that can slide forward and backward along the inner cavity of the first syringe, a second syringe and a second piston rod that can slide forward and backward along the inner cavity of the second syringe, and the first syringe and the second syringe are arranged side by side and in the same direction;

[0018] The dispensing needle assembly comprises an injection needle seat, a first needle tube and a second needle tube, wherein the first needle tube and the second needle tube are fixedly arranged at the front end of the injection needle seat extending in the front-back direction, and the injection needle seat is used to connect the first needle tube to the first syringe and connect the second needle tube to the second syringe;

[0019] The needle sealing assembly comprises a sliding sleeve and a sealing member, the rear end of the sliding sleeve can be axially slidably arranged on the outer side wall of the injection needle seat, and the sealing member is fixedly arranged on the front end of the sliding sleeve; the needle sealing assembly is installed on the dispensing needle assembly, so that when the sliding sleeve slides to the front part relative to the injection needle seat, the sealing member tightly wraps the front end openings of the first needle tube and the second needle tube, and when the sliding sleeve slides to the rear part relative to the injection needle seat, the front end openings of the first needle tube and the second needle tube pass through the sealing member;

[0020] The liquid transfer connector is detachably connected to the sliding sleeve of the needle sealing component, and when connected, the first needle tube and the second needle tube face the sealing plug of the liquid transfer connector.

[0021] The above-mentioned drug dispensing pipetting system preferably has: the pipetting connector is provided with a slope along the circumferential direction on one side of the first opening, and a limiting block is provided at the thicker part of the slope; a hook is provided at the front end outer edge of the sliding sleeve; the slope and the hook cooperate with each other so that the pipetting connector can be detachably connected to the drug liquid transferor when the hook slides from the thinner part of the slope to the thicker part.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The liquid transfer connector of the utility model has a hollow cavity arranged inside, a Luer connector arranged on the top, an open opening at the bottom of the hollow cavity and a sealing plug arranged thereon, and when in use, the needle sealing component can abut against the sealing plug, and the dispensing needle can simultaneously pass through the needle sealing component and the sealing plug to discharge the drug solution through the hollow cavity and the Luer connector, thereby realizing the connection of the liquid transfer connector to the injection device of the Luer interface, and the liquid transfer connector is also provided with a clamping structure, which can detachably connect the needle sealing component to the liquid transfer connector, thereby ensuring the stability and accuracy of the use of the liquid transfer connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic cross-sectional structure diagram of a liquid transfer connector according to an embodiment of the utility model;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the liquid transfer connector according to an embodiment of the utility model;

[0026] Figure 3a This is one of the representative physical pictures of the pipetting connector according to the utility model;

[0027] Figure 3b This is the second representative physical picture of the pipetting connector according to the utility model.

[0028] Figure 4 is a schematic cross-sectional structure diagram of a drug liquid transfer device according to an embodiment of the utility model;

[0029] Figure 5 It is a schematic diagram of the use status of the drug dispensing and liquid transfer system according to an embodiment of the utility model.

[0030] Figure numerals: 10, connector body; 20, hollow cavity; 21, open mouth; 22, assembly groove; 23, annular convex strip; 24, grip wing; 25, raised strip; 26, reinforcement plate; 30, Luer connector; 31, internal threaded connecting sleeve; 40, sealing plug; 41, annular groove; 50, sealing cover; 51, through hole; 52, ramp; 53, limit block; 60, double-chamber syringe; 61, first syringe; 62, first piston rod; 63, second syringe; 64, second piston rod; 70, dispensing needle assembly; 71, injection needle seat; 72, first needle tube; 73, second needle tube; 80, needle sealing assembly; 81, sliding sleeve; 82, sealing piece; 83, hook; 90, chemotherapy pump. DETAILED DESCRIPTION

[0031] In order to better illustrate the purpose, technical solution and advantages of the utility model, the specific implementation of the utility model is further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but are not intended to limit the scope of the utility model.

[0032] like Figure 1 to Figure 2 As shown, in view of the problems existing in the liquid medicine transfer device, according to an embodiment of the utility model, a pipetting connector dedicated to a Luer interface and a closed dispensing pipette is provided. The pipetting connector includes a connector body 10. Among them, a hollow cavity 20 is arranged inside the connector body 10. A Luer connector 30 communicating with the hollow cavity 20 is arranged on the top of the connector body 10. An open mouth 21 of the hollow cavity 20 is arranged at the bottom of the connector body 10, and an assembly groove 22 is arranged at the outer edge of the open mouth 21, and the radial dimension of the assembly groove 22 is greater than the radial dimension of the open mouth 21. A sealing plug 40 is arranged in the assembly groove 22. A sealing cover 50 is also arranged at the bottom of the connector body 10, and the sealing cover 50 is tightly abutted against the bottom of the sealing plug 40, so that the sealing plug 40 can seal the open mouth 21 of the hollow cavity 20. As a result, the hollow cavity 20 of the connector body 10 can only be communicated with the outside world through the Luer connector 30. At the same time, the sealing cover 50 is provided with a through hole 51 along the axial direction to expose the sealing plug 40, so that the sealing plug 40 can be pierced by the needle tube through the through hole 51. The outer edge of the sealing cover 50 is provided with a slope 52 as a clamping structure along the circumferential direction, and a limiting block 53 is provided at the thicker part of the slope 52, and two slopes 52 are symmetrically provided about the axial direction. When in use, the matching hook 83 can be rotated from the thin part of the slope 52 to the thick part of the slope 52, and is blocked by the limiting block 53, thereby achieving clamping.

[0033] When in use, the liquid medicine transfer device can be connected to an injection device with a Luer interface through the Luer connector 30, and the hook 83 of the needle sealing component 80 of the liquid medicine transfer device can be snapped into the slope 52 of the liquid medicine transfer device. At the same time, due to the position setting of the snap-fit ​​structure, the front end of the needle sealing component 80 will be tightly abutted against the sealing plug 40. At this time, the medicine dispensing needle component 70 is pushed forward relative to the needle sealing component 80, and the medicine dispensing needle can pass through the needle sealing component 80 and the sealing plug 40 at the same time, and the front end opening of the medicine dispensing needle is located in the hollow cavity 20 of the liquid medicine transfer device.

[0034] It can be seen that the pipetting connection of this embodiment can connect a device with a Luer interface to a closed pharmaceutical dispensing pipette while meeting the requirements of airtightness, stability and accuracy.

[0035] It should be noted that in order to facilitate stable connection between the dispensing needle and the hollow cavity 20, in the present embodiment, the hollow cavity 20 is configured to be a downward trumpet shape, and the bottom diameter of the hollow cavity 20 is larger than the radial diameter of the inner cavity of the Luer connector 30, thereby increasing the accommodating space for the dispensing needle.

[0036] It should be noted that in order to increase the airtightness of the installation of the sealing plug 40, in the present embodiment, an annular groove 41 is provided on the upper end surface of the sealing plug 40, and an annular ridge 23 is provided on the assembly groove. The height of the annular ridge 23 is greater than the depth of the annular groove 41, so that when the sealing plug 40 is installed in the assembly groove 22, the top of the annular ridge 23 abuts against the bottom of the annular groove 41.

[0037] It should be noted that in order to facilitate the connection operation of the pipetting connector, in the present embodiment, two holding wings 24 are provided on the outer side of the connector body 10, each holding wing 24 is connected to the bottom of the connector body 10 and extends axially, and each holding wing 24 is symmetrically arranged about the axial direction; the outer side of each holding wing 24 is respectively provided with a raised strip 25 extending radially; each holding wing 24 is provided with a longitudinally extending reinforcing plate 26, and the reinforcing plate 26 is respectively connected to the holding wing 24 and the connector body 10.

[0038] It should be noted that, in order to improve the connection stability of the pipetting connector, in this embodiment, an internal threaded connection sleeve 31 is provided on the outer side of the Luer connector 30. The pipetting connector is not only connected to the injection device through the Luer connector 30, but is also further threadedly fixed through the internal threaded connection sleeve 31.

[0039] Figure 3a and Figure 3b This is a representative physical picture of the pipetting connector. Figure 3a This is a real picture of the sample from the front view in the assembled state. Figure 3b This is a physical picture of the sample in a split state.

[0040] like Figure 4 and Figure 5 As shown, according to an embodiment of the utility model, a drug dispensing and liquid transfer system is also provided. The drug dispensing and liquid transfer system comprises the above-mentioned drug liquid transfer device and the above-mentioned liquid transfer connector.

[0041] In detail, the dual-chamber syringe 60 includes a first syringe 61, a first piston rod 62, a second syringe 63, and a second piston rod 64. The first syringe 61 and the second syringe 63 are arranged side by side and extend in the same direction. The first piston rod 62 can slide forward and backward in the inner cavity of the first syringe 61, and the second piston rod 64 can slide forward and backward in the inner cavity of the second syringe 63. A dispensing needle assembly 70 is installed at the front end of the dual-chamber syringe 60.

[0042] In detail, the dispensing needle assembly 70 includes an injection needle seat 71, a first needle tube 72, and a second needle tube 73. The first needle tube 72 and the second needle tube 73 both extend in the front-to-back direction, the first needle tube 72 is sleeved on the outside of the second needle tube 73, and the rear ends of the first needle tube 72 and the second needle tube 73 are respectively fixed to the front end of the injection needle seat. The rear end of the injection needle seat 71 is fixed to the front end of the double-chamber syringe 60, and by means of the setting of the internal channel of the injection needle seat 71, on the one hand, the rear end of the inner cavity between the inner wall of the first needle tube 72 and the outer wall of the second needle tube 73 is connected to the first syringe 61, and on the other hand, the rear end of the inner cavity of the second needle tube 73 is also connected to the second syringe 63. In other embodiments, the first needle tube 72 and the second needle tube 73 both extend in the front-to-back direction and are arranged side by side with each other at a preset phase spacing, and their rear ends are respectively fixed to the front end of the injection needle seat 71.

[0043] In detail, the needle sealing assembly 80 includes a sliding sleeve 81 and a sealing member 82. The sliding sleeve 81 is a through structure along the front-to-back direction. The sealing member 82 is made of an elastic material and is fixed to the front end of the sliding sleeve 81. The rear end of the sliding sleeve 81 is axially slidably arranged on the outer side wall of the injection needle seat 71. In the initial state, the sliding sleeve 81 is located at the front side of the sliding stroke, and the sealing member 82 will tightly wrap the front end openings of the first needle tube 72 and the second needle tube 73. When the dispensing starts, the front end of the liquid medicine transfer device is aligned and applies pressure toward the opening of the medicine bottle, and the sliding sleeve 81 will slide backward relative to the injection needle seat 71, so that the front end openings of the first needle tube 72 and the second needle tube 73 pierce the sealing member 82 and penetrate into the interior of the medicine bottle. When the dispensing is completed, the drug liquid transferor is pulled backward relative to the medicine bottle, and the sliding sleeve 81 will slide forward relative to the injection needle seat 71 (manually or under the action of spring force), so that the sealing member 82 re-wraps the front end openings of the first needle tube 72 and the second needle tube 73, thereby preventing the dispensing needle assembly 70 from leaking drugs during the dispensing process.

[0044] In detail, the liquid transfer connector and the liquid medicine transfer device are respectively provided with a detachable structure. Specifically, the outer edge of the sealing cover 50 of the liquid transfer connector is provided with two relative slopes 52 along the circumferential direction, and the front end outer edge of the sliding sleeve 81 of the needle sealing component 80 is provided with two relative hooks 83. The positions of the slope 52 and the hooks 83 cooperate with each other, so that the hooks 83 can rotate from the thinner part of the slope 52 to the thicker part, so that the hooks 83 clamp the slope 52. The two slopes 52 are arranged on the radial plane relative to the sealing plug 40, and the two hooks 83 are arranged on the sliding radial plane relative to the sliding sleeve 81, so that when the slope 52 is buckled with the hooks 83, the first needle tube 72 and the second needle tube 73 are both facing the sealing plug 40 of the liquid transfer connector.

[0045] See also Figure 5 , is the application of the drug dispensing and liquid transfer system to the chemotherapy pump 90 in this embodiment, including:

[0046] The first step is to buckle and fix the dispensing pipette to the downward end of the pipetting connector, screw the hook 83 from the thinner part of the slope 52 to the thicker part of the slope 52, and abut against the limit block 53; at the same time, connect the upward end of the pipetting connector to the Luer interface of the infusion tube of the chemotherapy pump 90.

[0047] In the second step, the syringe is pushed forward, and the front ends of the first needle tube 72 and the second needle tube 73 pass through the first sealing member 82 and communicate with the hollow inner cavity of the pipette connector.

[0048] The third step is to push the first piston rod 62 forward to push the prepared liquid medicine in the first syringe 61 into the chemotherapy pump 90 through the first needle tube 72, and the capsule in the chemotherapy pump 90 will gradually expand and increase the pressure.

[0049] It can be seen that the liquid transfer connector of this embodiment is installed on the chemotherapy pump 90, which can replace the original Luer interface and can be connected with the liquid medicine transfer device in a sealed manner.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] The above embodiments mainly describe the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A pipetting connector specially used for a Luer interface and a closed dispensing pipette, comprising a connector body (10), characterized in that: The connector body (10) is provided with a hollow cavity (20) inside, the top of the connector body (10) is provided with a Luer connector (30) connected to the hollow cavity (20), the bottom of the connector body (10) is provided with an open mouth (21) of the hollow cavity (20), the open mouth (21) is provided with a sealing plug (40) for sealing the open mouth (21), and the bottom of the connector body (10) is also provided with a snap-fit ​​structure, which is used to detachably fix the connector body (10) to a closed dispensing pipette.

2. The pipetting connector according to claim 1, characterized in that: The radial dimension of the bottom of the hollow cavity (20) is greater than the radial dimension of the inner cavity of the Luer connector (30).

3. The pipetting connector according to claim 1, characterized in that: The outer edge of the open mouth (21) is provided with a mounting groove (22), the sealing plug (40) is cooperatively arranged in the mounting groove (22), and the radial dimension of the mounting groove (22) is greater than the radial dimension of the open mouth (21).

4. The pipetting connector according to claim 3, characterized in that: The upper end surface of the sealing plug (40) is provided with an annular groove (41), and the assembly groove (22) is provided with an annular convex strip (23), the height of the annular convex strip (23) being greater than the depth of the annular groove (41), so that when the sealing plug (40) is installed in the assembly groove (22), the top of the annular convex strip (23) abuts against the bottom of the annular groove (41).

5. The pipetting connector according to claim 1, characterized in that: A sealing cover (50) is also provided at the bottom of the connector body (10), and the sealing cover (50) is arranged at the bottom of the sealing plug (40). The sealing cover (50) is provided with a through hole (51) along the axial direction so that the sealing plug (40) is exposed through the through hole (51).

6. The pipetting connector according to claim 1, characterized in that: A sealing cover (50) is also provided at the bottom of the connector body (10), and a slope (52) as a clamping structure is circumferentially provided on the outer edge of the sealing cover (50), and a limiting block (53) is provided at a thicker part of the slope (52), and two slopes (52) are symmetrically provided about the axial direction.

7. The pipetting connector according to claim 1, characterized in that: Two holding wings (24) are arranged on the outer side of the connector body (10), each of the holding wings (24) is connected to the bottom of the connector body (10) and extends axially, and each of the holding wings (24) is symmetrically arranged about the axial direction; a raised strip (25) extending radially is arranged on the outer side of each of the holding wings (24); each of the holding wings (24) is provided with a longitudinally extending reinforcing plate (26), and the reinforcing plate (26) is respectively connected to the holding wing (24) and the connector body (10).

8. The pipetting connector according to claim 1, characterized in that: An internal threaded connection sleeve (31) is provided on the outer side of the Luer connector (30).

9. A dispensing pipetting system comprising the pipetting connector specifically used for the Luer interface and the closed dispensing pipette according to any one of claims 1 to 8, characterized in that: Also included is a liquid medicine transfer device, which includes a double-chamber syringe (60), a dispensing needle assembly (70) and a needle sealing assembly (80); The double-chamber syringe (60) is composed of a first syringe (61), a first piston rod (62) that can slide forward and backward along the inner cavity of the first syringe (61), a second syringe (63), and a second piston rod (64) that can slide forward and backward along the inner cavity of the second syringe (63), and the first syringe (61) and the second syringe (63) are arranged side by side and in the same direction; The dispensing needle assembly (70) comprises an injection needle seat (71), a first needle tube (72) and a second needle tube (73), wherein the first needle tube (72) and the second needle tube (73) are fixedly arranged at the front end of the injection needle seat (71) in a manner extending in the front-to-back direction, and the injection needle seat (71) is used to connect the first needle tube (72) to the first injection cylinder (61), and to connect the second needle tube (73) to the second injection cylinder (63); The needle sealing assembly (80) comprises a sliding sleeve (81) and a sealing member (82), wherein the rear end of the sliding sleeve (81) is axially slidably disposed on the outer side wall of the injection needle seat (71), and the sealing member (82) is fixedly disposed on the front end of the sliding sleeve (81); the needle sealing assembly (80) is mounted on the dispensing needle assembly (70), so that when the sliding sleeve (81) slides to the front relative to the injection needle seat (71), the sealing member (82) tightly wraps the front end openings of the first needle tube (72) and the second needle tube (73), and when the sliding sleeve (81) slides to the rear relative to the injection needle seat (71), the front end openings of the first needle tube (72) and the second needle tube (73) pass out of the sealing member (82); The liquid transfer connector is detachably connected to the sliding sleeve (81) of the needle sealing component (80), and when connected, the first needle tube (72) and the second needle tube (73) face the sealing plug (40) of the liquid transfer connector.

10. The drug dispensing and liquid transfer system according to claim 9, characterized in that: The liquid transfer connector is provided with a slope (52) along the circumferential direction on one side of the first opening, and a limiting block (53) is provided at a thicker part of the slope (52); a hook (83) is provided at the front end outer edge of the sliding sleeve (81); the slope (52) and the hook (83) cooperate with each other, so that when the hook (83) slides from the thinner part of the slope (52) to the thicker part, the liquid transfer connector can be detachably connected to the liquid medicine transfer device.

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