Universal integrated closed liquid medicine transfer device

Abstract

The utility model provides a universal integrated closed liquid medicine transfer device which comprises an injector, an injection head of the injector is connected with a fixed cylinder, the inner wall of the fixed cylinder is connected with a movable cylinder in a sliding mode in the axial direction, and an elastic element is arranged between the movable cylinder and the fixed cylinder. The elastic element forces the movable cylinder to slide away from the injection head along the inner wall of the fixed cylinder; a sealing plug is arranged at the end, away from the injection head, of the movable cylinder, a needle tube is installed on the injection head, and the tail end of the needle tube extends to the sealing plug. The sealing plug is arranged at the bottom end of the movable cylinder, so that liquid medicine can be prevented from leaking, and the transferring safety of the liquid medicine is improved; meanwhile, the fixed cylinder is in sliding connection fit with the movable cylinder, the elastic element is adopted for resetting, and after the needle tube sucks liquid medicine, the movable cylinder can automatically get away from the fixed cylinder under the action of the elastic element, so that the needle tube automatically retracts into the movable cylinder, the operation steps are further simplified, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a universal integrated closed liquid medicine transfer device. Background Art

[0002] Dangerous drugs, such as chemotherapy drugs, are extremely harmful to the health of medical staff who prepare and transport such drugs for a long time, such as causing cancer, damage to internal organs, DNA damage, reproductive problems, miscarriage and teratogenesis. Existing data show that the incidence of cancer among pharmacists, nurses and other personnel who have long-term contact with dangerous drugs is 3-10 times higher than that of the general population, and the risk of infertility or miscarriage is 2-5 times higher.

[0003] The closed liquid medicine transfer device is an infusion, nursing and protective device used in the medical field. Its main function is to provide a closed environment during the liquid medicine transfer process to prevent leakage and contamination of the liquid medicine and protect the safety of medical staff and patients.

[0004] In recent years, the US BD company has launched a closed configuration and transfer system, but it is difficult to promote due to its complex structure, high cost and cumbersome operation. At the same time, the system can only reduce the risk of leakage by 50-80%. Summary of the invention

[0005] The present application provides a universal integrated closed liquid medicine transfer device, which solves the problems of complex structure, high cost and complicated operation of existing closed liquid medicine transfer devices.

[0006] The present application provides a universal integrated closed liquid medicine transfer device, comprising a syringe, the injection head of the syringe is connected to a fixed cylinder, the inner wall of the fixed cylinder is axially slidably connected to a movable cylinder, an elastic element is provided between the movable cylinder and the fixed cylinder, the elastic element forces the movable cylinder to slide along the inner wall of the fixed cylinder away from the injection head; a sealing plug is provided at one end of the movable cylinder away from the injection head, a needle tube is installed on the injection head, and the end of the needle tube extends to the sealing plug.

[0007] In the technical solution provided by the present application, a sealing plug is provided at the bottom end of the movable cylinder to prevent leakage of the medicine solution and improve the safety of the transfer of the medicine solution; at the same time, by the sliding connection between the fixed cylinder and the movable cylinder and the use of an elastic element for resetting, after the needle tube absorbs the medicine solution, the movable cylinder will automatically move away from the fixed cylinder under the action of the elastic element, so that the needle tube automatically "retracts" into the movable cylinder, further simplifying the operating steps and reducing the manufacturing cost.

[0008] In some embodiments, a hole groove is opened axially on the side wall of the fixed cylinder, and a first limit block matching the hole groove is provided on the outer wall of the movable cylinder. When the bottom surface of the first limit block abuts against the bottom surface of the hole groove, the end of the needle tube is located outside the sealing plug; by providing the hole groove and the first limit block, on the one hand, the movable cylinder can be prevented from slipping out of the fixed cylinder, thereby playing a limiting role; on the other hand, when the bottom end of the hole groove abuts against the first limit block, the end of the needle tube is located outside the sealing plug, which is convenient for exhaust operation.

[0009] In some embodiments, the outer wall of the fixed cylinder is provided with a hinge support, and a pressure handle is hinged on the hinge support. A clamping block is provided at one end of the pressure handle, and a second limit block matching the clamping block is provided on the outer wall of the movable cylinder. The pressure handle rotates around the hinge support so that the clamping block clamps the second limit block or releases the second limit block; when the clamping block clamps the second limit block, the end of the needle tube is inserted into the sealing plug; by providing the pressure handle, the clamping block and the second limit block, it is convenient to clamp the second limit block through the clamping block after the needle tube absorbs the medicine, so that the end of the needle tube stays in the sealing plug, thereby preventing the medicine in the needle tube from overflowing, and further improving the sealing and anti-leakage effect.

[0010] In some embodiments, a guide groove is provided axially on the outer wall of the movable cylinder, and a guide block matching the guide groove is provided on the inner wall of the fixed cylinder; by providing the guide groove and the guide block, the movable cylinder can be constrained to slide in a straight line on the inner wall of the fixed cylinder without rotating, thereby further improving the stability of the structure.

[0011] In some embodiments, the elastic element is a compression spring, the top end of the compression spring abuts against the top surface of the fixed cylinder, and the bottom end of the compression spring abuts against the bottom surface of the movable cylinder.

[0012] In certain embodiments, a joint is provided at the top of the fixed cylinder, and the joint is detachably connected to the injection head. The fixed cylinder and the syringe are detachably connected to the injection head via the joint, which facilitates replacement of parts and saves costs.

[0013] In some embodiments, a limit column is coaxially provided inside the fixed cylinder, an axial hole is provided at the center of the limit column, the inner diameter of the axial hole matches the outer diameter of the needle tube, and the needle tube is embedded in the axial hole of the limit column; by arranging the limit column inside the fixed cylinder and embedding the needle tube in the axial hole of the limit column, the needle tube can be prevented from lateral shaking during the puncture process, thereby improving the stability of the structure.

[0014] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings in this application are used to illustrate preferred embodiments, so that those skilled in the art can clearly understand various other advantages and benefits, and should not be considered as limitations of this application. In addition, the same reference numerals are used throughout the drawings to represent the same or similar components.

[0016] Figure 1 This is a schematic diagram of the external structure of a universal integrated closed liquid medicine transfer device of the present application;

[0017] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0018] Figure 3 This is a schematic diagram of the structure inside the fixed cylinder when the clamping block abuts against the second limiting block in one embodiment of the present application;

[0019] Figure 4 This is a schematic diagram of the structure inside the fixed cylinder when the first limit block abuts against the bottom end of the hole groove in one embodiment of the present application;

[0020] Figure 5 A three-dimensional diagram of a movable cylinder in one embodiment of the present application;

[0021] Figure 6 A top view of a movable cylinder in one embodiment of the present application;

[0022] Figure 7 This is a schematic diagram of the partial structure of the drug liquid transfer device after the needle tube pierces the vial in one embodiment of the present application;

[0023] Icons: 1. Syringe; 2. Injection head; 3. Fixed cylinder; 4. Movable cylinder; 5. Elastic element; 6. Sealing plug; 7. Needle tube; 8. Hole groove; 9. First limit block; 10. Press handle; 11. Block; 12. Second limit block; 13. Guide groove; 14. Connector; 15. Limit column; 16. Syringe bottle. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), unless otherwise clearly and specifically defined.

[0027] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0028] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0029] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0030] See also Figure 1-Figure 7The embodiment of the present application provides a universal integrated closed liquid medicine transfer device, including a syringe 1, an injection head 2 of the syringe 1 is connected to a fixed cylinder 3, the inner wall of the fixed cylinder 3 is axially slidably connected to a movable cylinder 4, an elastic element 5 is provided between the movable cylinder 4 and the fixed cylinder 3, and the elastic element 5 forces the movable cylinder 4 to slide along the inner wall of the fixed cylinder 3 away from the injection head 2; a sealing plug 6 is provided at one end of the movable cylinder 4 away from the injection head 2, a needle tube 7 is installed on the injection head 2, and the end of the needle tube 7 extends to the sealing plug 6.

[0031] In the technical solution provided in the embodiment of the present application, a sealing plug 6 is provided at the bottom end of the movable cylinder 4 to prevent leakage of the medicine solution and improve the safety of the transfer of the medicine solution; at the same time, the fixed cylinder 3 and the movable cylinder 4 are slidably connected and coordinated, and the elastic element 5 is used for resetting. After the needle tube 7 absorbs the medicine solution, the movable cylinder 4 will automatically move away from the fixed cylinder 3 under the action of the elastic element 5, so that the needle tube 7 automatically "retracts" into the movable cylinder 4, further simplifying the operation steps and reducing the manufacturing cost.

[0032] Please continue reading Figure 2 In some embodiments, a hole groove 8 is provided in the axial direction on the side wall of the fixed cylinder 3, and a first limit block 9 matching the hole groove 8 is provided on the outer wall of the movable cylinder 4. When the bottom surface of the first limit block 9 abuts against the bottom surface of the hole groove 8, the end of the needle tube 7 is located outside the sealing plug 6; by providing the hole groove 8 on the side wall of the fixed cylinder 3 and setting the first limit block 9 on the outer wall of the movable cylinder 4, when the elastic element 5 drives the movable cylinder 4 away from the fixed cylinder 3, the first limit block 9 moves downward along the hole groove 8 until the first limit block 9 moves to the bottom end of the hole groove 8; the hole groove 8 and the first limit block 9 are provided, on the one hand, to prevent the movable cylinder 4 from slipping out of the fixed cylinder 3 and play a limiting role; on the other hand, when the bottom end of the hole groove 8 abuts against the first limit block 9, the end of the needle tube 7 is located outside the sealing plug 6, which is convenient for exhaust operation.

[0033] Please continue reading Figure 5 , Figure 6 In a specific embodiment, the side wall of the fixed cylinder 3 is provided with four hole grooves 8, and the outer wall of the movable cylinder 4 is provided with four first limit blocks 9 (the number of hole grooves 8 and first limit blocks 9 can be flexibly adjusted according to actual conditions), which respectively correspond to the four hole grooves 8 on the side wall of the fixed cylinder 3. By setting four hole grooves 8 and four first limit blocks 9 for cooperation, the stability of the structure is improved.

[0034] Please continue reading Figure 3 , Figure 4In some embodiments, a hinge support is provided on the outer wall of the fixed cylinder 3, and a pressure handle 10 is hinged on the hinge support. A clamping block 11 is provided at one end of the pressure handle 10, and a second limit block 12 matching the clamping block 11 is provided on the outer wall of the movable cylinder 4. The pressure handle 10 rotates around the hinge support so that the clamping block 11 clamps the second limit block 12 or releases the second limit block 12; when the clamping block 11 clamps the second limit block 12, the end of the needle tube 7 is inserted into the sealing plug 6; by providing the pressure handle 10, the clamping block 11 and the second limit block 12, it is convenient to clamp the second limit block 12 through the clamping block 11 after the needle tube 7 absorbs the medicine, so that the end of the needle tube 7 stays in the sealing plug 6, thereby preventing the medicine in the needle tube 7 from overflowing, and further improving the sealing and anti-leakage effect.

[0035] In a specific embodiment, the pressing handle 10, the hinge support, and the clamping block 11 are provided in two groups, which are respectively arranged on both sides of the outer wall of the fixed cylinder 3, and the second limit block 12 is also provided with two (the number of the second limit block 12 and the clamping block 11 can be flexibly adjusted according to actual conditions), which correspond to the two clamping blocks 11 respectively; by setting two clamping blocks 11 and the second limit block 12, the stability of the structure is improved.

[0036] In a specific embodiment, a torsion spring is provided on the pin shaft that hinges the hinge support and the pressure handle 10, and the torsion spring provides a torque to force the pressure handle 10 to rotate around the hinge support, so that the clamping block 11 clamps the second limit block 12; when the second limit block 12 needs to be loosened, it is only necessary to press the rear end of the pressure handle 10 by hand to overcome the torque of the torsion spring and make the pressure handle 10 rotate around the hinge support, so that the clamping block 11 loosens the second limit block 12.

[0037] In a specific embodiment, the pressing handle 10, the hinge support and the block 11 can also be integrally injection molded. When the rear end of the pressing handle 10 is pressed, the block 11 is pried open by the lever principle to release the second limit block 12. When the pressing handle 10 is released, the pressing handle 10 and the block 11 automatically return to their initial state due to the effect of the integral injection molding material.

[0038] Please continue reading Figure 2 In some embodiments, a guide groove 13 is provided on the outer wall of the movable cylinder 4 along the axial direction, and a guide block matching the guide groove 13 is provided on the inner wall of the fixed cylinder 3; by providing the guide groove 13 and the guide block, the movable cylinder 4 can be constrained to slide along a straight line on the inner wall of the fixed cylinder 3 without rotating, thereby further improving the stability of the structure.

[0039] In a specific embodiment, two guide grooves 13 and two guide blocks are provided, and are respectively arranged on both sides of the movable cylinder 4 and the fixed cylinder 3; by providing two guide grooves 13 and two guide blocks, the stability of the structure is improved.

[0040] Please continue reading Figure 5 , Figure 6 In some embodiments, the elastic element 5 is a compression spring, the top end of the compression spring abuts against the top surface of the fixed cylinder 3 , and the bottom end of the compression spring abuts against the bottom surface of the movable cylinder 4 .

[0041] Please continue reading Figure 2 In some embodiments, a joint 14 is provided at the top of the fixed barrel 3, and the joint 14 is detachably connected to the injection head 2. The fixed barrel 3 and the syringe 1 are detachably connected to the injection head 2 through the joint 14, which facilitates the replacement of parts and saves costs.

[0042] In a specific implementation, the connector 14 and the injection head 2 can be connected by threads or by snap-fit ​​connection. During the specific implementation, a suitable connection method can be flexibly selected according to actual conditions.

[0043] Please continue reading Figure 3 , Figure 4 In some embodiments, a limiting column 15 is coaxially provided inside the fixed cylinder 3, and an axial hole is provided at the center of the limiting column 15. The inner diameter of the axial hole matches the outer diameter of the needle tube 7, and the needle tube 7 is embedded in the axial hole of the limiting column 15; by arranging the limiting column 15 inside the fixed cylinder 3 and embedding the needle tube 7 in the axial hole of the limiting column 15, the needle tube 7 can be prevented from lateral shaking during the puncture process, thereby improving the stability of the structure.

[0044] In a specific embodiment, the sealing plug 6 can be a soft plug such as a rubber plug, a silicone plug, etc. that has sealing properties and can be pierced by the needle tube 7.

[0045] The working principle of the liquid medicine transfer device of this embodiment is as follows:

[0046] First, the syringe 1 is connected and fixed to the fixed cylinder 3; when dispensing medicine, the sealing plug 6 at the bottom of the movable cylinder 4 is pressed against the bottle mouth of the vial 16, and the fixed cylinder 3 is pressed down so that the movable cylinder 4 overcomes the elastic force of the elastic element 5 and retracts into the fixed cylinder 3, and the needle tube 7 pierces the sealing plug 6 and the stopper of the vial 16 in turn and then extends into the vial 16. Figure 7As shown, the dispensing work begins; after the dispensing work is completed, the fixed cylinder 3 is pulled upward to drive the needle tube 7 to pull out the cillin bottle 16. In the process of pulling out the needle tube 7, the movable cylinder 4 always presses against the bottle mouth of the cillin bottle 16 under the action of the elastic element 5 to prevent the liquid medicine from leaking; when the needle tube 7 is completely pulled out, the elastic element 5 continues to force the movable cylinder 4 to slide downward until the block 11 blocks the second limit block 12, at which time the end of the needle tube 7 is immersed in the sealing plug 6, further preventing the liquid medicine in the needle tube 7 from leaking; then the next step of dispensing work can be continued; if at this time If exhaust operation is required, the liquid medicine transferor can be turned upside down first so that the needle tube 7 is facing upward, and then the pressure handle 10 is pressed by hand to make the clamping block 11 release the second limit block 12. When the clamping block 11 releases the second limit block 12, the movable cylinder 4 continues to slide away from the fixed cylinder 3 under the action of the elastic element 5 until the end of the hole groove 8 on the fixed cylinder 3 abuts against the first limit block 9 on the movable cylinder 4. At this time, the end of the needle tube 7 is "retracted" from the sealing plug 6, and the sealing plug 6 cannot seal the needle tube 7. At this time, the exhaust operation can be performed by pushing the piston of the syringe 1.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A universal integrated closed liquid medicine transfer device, characterized in that: The invention comprises a syringe (1), wherein an injection head (2) of the syringe (1) is connected to a fixed cylinder (3), the inner wall of the fixed cylinder (3) is axially slidably connected to a movable cylinder (4), an elastic element (5) is provided between the movable cylinder (4) and the fixed cylinder (3), and the elastic element (5) forces the movable cylinder (4) to slide along the inner wall of the fixed cylinder (3) away from the injection head (2); a sealing plug (6) is provided at one end of the movable cylinder (4) away from the injection head (2), a needle tube (7) is installed on the injection head (2), and the end of the needle tube (7) extends to the sealing plug (6).

2. A universal integrated closed liquid medicine transfer device according to claim 1, characterized in that: The side wall of the fixed cylinder (3) is provided with a hole groove (8) along the axial direction, and the outer wall of the movable cylinder (4) is provided with a first limit block (9) matching the hole groove (8). When the bottom surface of the first limit block (9) abuts against the bottom surface of the hole groove (8), the end of the needle tube (7) is located outside the sealing plug (6).

3. A universal integrated closed liquid medicine transfer device according to claim 1, characterized in that: The outer wall of the fixed cylinder (3) is provided with a hinge support, and a pressure handle (10) is hinged on the hinge support. A clamping block (11) is provided at one end of the pressure handle (10). The outer wall of the movable cylinder (4) is provided with a second limit block (12) matched with the clamping block (11). The pressure handle (10) rotates around the hinge support so that the clamping block (11) clamps the second limit block (12) or releases the second limit block (12); when the clamping block (11) clamps the second limit block (12), the end of the needle tube (7) is inserted into the interior of the sealing plug (6).

4. A universal integrated closed liquid medicine transfer device according to claim 1, characterized in that: The outer wall of the movable cylinder (4) is provided with a guide groove (13) along the axial direction, and the inner wall of the fixed cylinder (3) is provided with a guide block matching the guide groove (13).

5. The universal integrated closed liquid medicine transfer device according to claim 1, characterized in that: The elastic element (5) is a compression spring, the top end of the compression spring abuts against the top surface of the fixed cylinder (3), and the bottom end of the compression spring abuts against the bottom surface of the movable cylinder (4).

6. The universal integrated closed liquid medicine transfer device according to claim 1, characterized in that: A joint (14) is provided at the top end of the fixed cylinder (3), and the joint (14) is detachably connected to the injection head (2).

7. The universal integrated closed liquid medicine transfer device according to claim 1, characterized in that: A limiting column (15) is coaxially arranged inside the fixed cylinder (3), and an axial hole is arranged at the center of the limiting column (15). The inner diameter of the axial hole matches the outer diameter of the needle tube (7), and the needle tube (7) is embedded in the axial hole of the limiting column (15).

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