Needle-free closed medicine dispensing pipettor and medicine dispensing pipetting assembly thereof
By designing a needle-free sealed dispensing pipette, using a dual-chamber injection assembly and a sealing plug to close the channel, the problem of high leakage risk of existing dispensing devices is solved, fully enclosed drug preparation and transfer is achieved, the risk of drug leakage is reduced, and the safety and convenience of the equipment are improved.
Patent Information
- Application Number
- CN202420534913.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-03-19
AI Technical Summary
The existing closed dispensers have problems such as airbags are easily damaged and the passages are easily permeable to the drug liquid, resulting in high leakage risk, complex structure, high cost and cumbersome operation.
A sealed dispensing pipette with needle-free use is designed, using a dual-chamber injection assembly and pipetting channel part, which closes the channel through a sealing plug to achieve fully closed drug preparation and transfer, and reduces the risk of drug leakage by automatically or manually adjusting the air pressure.
It has achieved full sealing of drug preparation and transfer, which maximizes and reduces the risk of drug leakage, and has a delicate structural design, easy assembly, low cost and convenient use.
Smart Images
Figure CN222549690U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to medical equipment, in particular to a needle-free closed medicine dispensing pipette and a medicine dispensing pipette component thereof. Background Art
[0002] There is a great demand for closed liquid medicine transfer devices in the diagnosis and treatment process in China, but there are few choices. The products are required to be not only airtight, but also low-cost and easy to use. In recent years, the American 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%. The existing dispenser is equipped with an airbag to balance the air pressure. Some problems have also been found in the promotion and application, such as the airbag structure is easy to damage / easy to detach, the channel connecting the airbag is easily infiltrated with liquid medicine and blocked, etc., so there is still a certain risk of leakage. Utility Model Content
[0003] In order to solve the problems existing in the prior art, the main purpose of the utility model is to provide a needle-free, closed medicine dispensing pipette and its medicine dispensing pipette assembly, which have a sophisticated structural design and are easy to assemble, can achieve fully closed drug preparation and transfer, and the air pressure in the medicine container can be automatically or manually adjusted and balanced during use to maximize the reduction of the risk of drug leakage. The sealing effect is very excellent, and it has the advantages of low cost and easy use.
[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions.
[0005] In a first aspect, the utility model provides a medication dispensing pipette, comprising a dual-chamber injection assembly and a pipetting channel portion;
[0006] The double-chamber injection assembly is composed of a first injection cylinder, a first piston rod that can slide forward and backward along the inner cavity in the first injection cylinder, a second injection cylinder, and a second piston rod that can slide forward and backward along the inner cavity in the second injection cylinder;
[0007] The transfer channel part includes a docking seat body and a sealing plug. The docking seat body is connected to the dual-chamber injection assembly. The inner front side of the docking seat body is provided with a first channel and a second channel. The rear end of the docking seat body connects the first channel to the first syringe and connects the second channel to the second syringe. The first channel and the second channel are provided with parallel openings at the front end of the docking seat body, and the openings of the first channel and the second channel are closed by the sealing plug.
[0008] Preferably, the first syringe and the second syringe are arranged side by side and in the same direction.
[0009] In a second aspect, the utility model provides a medication dispensing and liquid transfer assembly, comprising the medication dispensing pipette described above, and also comprising a liquid transfer communicating device;
[0010] The transfer communicating device comprises a container connecting part, a first needle tube, a second needle tube, a docking jacket, a sealing member and a reset structure; wherein the container connecting part is arranged at the front end of the transfer communicating device and is used to be connected with a medical container or an interface, and a through hole for the first needle tube and the second needle tube to pass through is arranged on the rear end surface of the container connecting part; the docking jacket is through-through and arranged at the rear end of the transfer communicating device, and the front end of the docking jacket is fixedly connected with the rear end surface of the container connecting part; the first needle tube and the second needle tube are arranged in parallel in the transfer communicating device and are fixedly connected with the container connecting part in the form of passing through the rear end surface of the container connecting part; a sliding sleeve is arranged on the outer side of the sealing member and can be slidably arranged in the docking jacket in the front and rear direction; in the initial state, the sealing member wraps the rear end openings of the first needle tube and the second needle tube;
[0011] The docking sleeve and the docking seat body cooperate with each other so that when the two are in the docking state, the docking seat body can be inserted into the docking sleeve and push the seal to slide forward, and the first needle tube passes through the seal and the sealing plug and enters the first channel. At the same time, the second needle tube passes through the seal and the sealing plug and enters the second channel; in the non-docking state, the docking seat body withdraws from the docking sleeve, the first needle tube withdraws from the first channel and the sealing plug, the second needle tube withdraws from the second channel and the sealing plug, and the reset structure pushes the seal to slide backward, so that the seal re-wraps the rear end openings of the first needle tube and the second needle tube.
[0012] Preferably, the reset structure comprises a spring, which is arranged inside the docking sleeve; one end of the spring abuts against the front end surface of the seal, and the other end abuts against the rear end surface of the container connection portion;
[0013] When the docking seat body is inserted into the docking sleeve, the docking seat body abuts against the rear end of the sliding sleeve, pushing the sealing element to slide forward, and the spring is compressed in the axial direction;
[0014] When the docking seat body is withdrawn from the docking sleeve, the spring releases its elastic force axially to push the sealing member to slide backward, and the sealing member re-wraps the rear end openings of the first needle tube and the second needle tube.
[0015] Preferably, a card slot is provided at the inner rear portion of the docking sleeve, and a buckle is provided at the outer rear portion of the docking seat body. The buckle and the card slot are arranged in cooperation with each other, and when the dispensing pipette is connected to the pipetting connector, they are fixed by snapping.
[0016] Preferably, the reset structure of the above-mentioned dispensing and liquid transfer assembly includes an elastic arm and a groove; at least two elastic arms are arranged on the rear side of the sliding sleeve, and each elastic arm is radially deflected outward when no external force is applied, and a clearance groove corresponding to the number and position of the elastic arms is arranged on the inner rear part of the docking sleeve;
[0017] When the sealing member is in a position to wrap the rear end openings of the first needle tube and the second needle tube, the two elastic arms are naturally opened in the respective concession grooves correspondingly;
[0018] The end of the elastic arm is provided with an inward protrusion, and the positions of the protrusion and the groove are matched, so that when the sliding sleeve slides forward and the two elastic arms move inward due to extrusion, the protrusion of the elastic arm will be embedded in the groove of the docking seat body.
[0019] Preferably, a limiting boss is provided at the inner rear end of the docking sleeve to prevent the sliding sleeve from detaching from the docking sleeve.
[0020] Preferably, a guide groove is provided on the inner side of the docking sleeve, and the guide groove is parallel to the sliding direction to prevent the sliding sleeve from rotating in the axial direction.
[0021] Preferably, the container connecting portion of the pipetting communication tube comprises a connecting and fixing buckle, and the connecting and fixing buckle is used to snap-fit and fix the pipetting communication tube to a medical container or a medical interface.
[0022] Preferably, the front end of the pipetting communication device further includes two holding wings extending forward and symmetrically arranged. Compared with the prior art, the utility model has the following beneficial effects:
[0023] (1) The dispensing pipette of the utility model is provided with a double-chamber injection part and a pipetting channel part. The pipetting channel part can connect the first syringe and the second syringe to the medical container or interface respectively through a matching adapter. The first syringe can be used to extract or inject liquid medicine into the medical container or interface, and the second syringe can be used to replenish or exhaust air from the medical container or interface through the injection needle seat and the second needle tube, thereby balancing the air pressure in the container or interface. At the same time, during the dispensing process of the dispensing pipette, the first channel and the second channel are both closed by a sealing plug to avoid leakage. No needle tube is provided, thereby achieving puncture prevention.
[0024] (2) The dispensing pipette assembly of the utility model is further provided with a pipette connector. The pipette connector is provided with a first needle tube, a second needle tube and a docking sleeve. When dispensing medicine, the first needle tube and the second needle tube extend from the front end of the pipette connector and can be connected to a medical container or an interface; the first needle tube and the second needle tube extend along the docking sleeve and can correspond to the first channel and the second channel of the docking pipette. The needle tips of the first needle tube and the second needle tube are located inside the docking sleeve to avoid puncture. By pushing the first piston rod, the first syringe can be connected to the container or the joint after passing through the first channel and the first needle tube and transmit the liquid medicine. By pushing the second piston rod, the second syringe can be connected to the container or the joint after passing through the second channel and the second needle tube and balance the air pressure to achieve high-pressure leakage prevention. In the pipette connector, in the non-docking state, the rear end openings of the first needle tube and the second needle tube are closed by a sealing member. At the same time, once the front ends of the first needle tube and the second needle tube pierce the container or the joint, they will no longer be separated from the container or the joint, thereby achieving needle leakage prevention in the entire process of dispensing medicine.
[0025] The utility model is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 A schematic structural diagram of a medicine dispensing pipette and a medicine dispensing pipette assembly according to a first embodiment of the utility model;
[0027] Figure 2 A schematic structural diagram of the medication dispensing and liquid transfer assembly in the medication dispensing state according to the first embodiment of the utility model.
[0028] Figure 3 A schematic structural diagram of a medicine dispensing pipette and a medicine dispensing pipette assembly according to a second embodiment of the present utility model;
[0029] Figure 4 A schematic structural diagram of a medication dispensing and liquid transfer assembly in a medication dispensing state according to a second embodiment of the utility model.
[0030] Figure numerals: 100, dispensing pipette; 10, double-chamber injection assembly; 11, first syringe; 12, second syringe; 13, first piston rod; 14, second piston rod; 20, pipetting channel portion; 21, first channel; 22, second channel; 23, docking seat body; 24, sealing plug; 27, buckle; 28, groove; 300, pipetting connecting vessel; 31, first needle tube; 32, second needle tube; 33, docking sleeve; 331, give way groove; 332, guide groove; 333, limit boss; 34, sliding sleeve; 35, sealing element; 36, spring; 37, slot; 38, elastic arm; 39, connecting and fixing buckle; 40, holding wing; 500, syringe bottle. 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] First embodiment
[0033] like Figure 1 FIG. 1 is a medicine dispensing pipette 100 according to a first embodiment of the present invention. The medicine dispensing pipette 100 comprises a double-chamber injection assembly 10 and a pipetting channel portion 20 .
[0034] The dual-chamber injection assembly 10 is composed of a first syringe 11, a first piston rod 13 that can slide forward and backward along the inner cavity of the first syringe 11, a second syringe 12, and a second piston rod 14 that can slide forward and backward along the inner cavity of the second syringe 12. The first syringe 11 and the second syringe 12 are arranged side by side and in the same direction.
[0035] The pipetting channel part 20 includes a docking seat body 23 and a sealing plug 24. The docking seat body 23 is connected to the dual-chamber injection assembly 10. The first channel 21 and the second channel 22 are arranged on the inner front side of the docking seat body 23. The rear end of the docking seat body 23 connects the first channel 21 to the first injection cylinder 11, and connects the second channel 22 to the second injection cylinder 12. The first channel 21 and the second channel 22 are provided with parallel openings at the front end of the docking seat body 23, and the openings of the first channel 21 and the second channel 22 are closed by the sealing plug 24.
[0036] When the dispensing pipette 100 of this embodiment is in use, the pipetting channel part 20 can connect the first syringe 11 and the second syringe 12 to the medical container or interface respectively through a matching adapter. The first syringe 11 can be used to extract or inject liquid medicine into the medical container or interface, and the second syringe 12 can be used to replenish or discharge gas from the medical container or interface through the injection needle seat and the second needle tube 32.
[0037] It can be seen that the dispensing pipette 100 of the utility model can achieve air pressure balance in the dispensing process and prevent high-pressure leakage. The first channel 21 and the second channel 22 are both closed by the sealing plug 24, thereby avoiding leakage. No needle tube is provided, thereby achieving anti-puncture.
[0038] Continue to refer Figure 1 , is a medicine dispensing and liquid transfer assembly according to the first embodiment of the utility model. The medicine dispensing and liquid transfer assembly includes not only the medicine dispensing and liquid transfer device 100 mentioned above, but also a matching liquid transfer communication device 300 .
[0039] In detail, the pipetting communication vessel 300 includes a container connecting portion, a first needle tube 31, a second needle tube 32, a docking sleeve 33, a sealing member 35 and a spring 36; wherein, the container connecting portion is arranged at the front end of the pipetting communication vessel 300, and is used to be connected to a medical container or an interface, and a through hole is provided on the rear end face of the container connecting portion for the first needle tube 31 and the second needle tube 32 to pass through; the docking sleeve 33 is through-through and arranged at the rear end of the pipetting communication vessel 300, and the front end of the docking sleeve 33 is fixedly connected to the rear end face of the container connecting portion; the first needle tube 31 and the second needle tube 32 are arranged in parallel with each other in the pipetting communication vessel 300, and are fixedly connected to the container connecting portion in the form of passing through the rear end face of the container connecting portion; a sliding sleeve 34 is provided on the outer side of the sealing member 35 and can be slidably arranged in the docking sleeve 33; in the initial state, the sealing member 35 wraps the rear end openings of the first needle tube 31 and the second needle tube 32.
[0040] The liquid transfer manifold 300 uses a spring 36 as a reset structure. The spring 36 is arranged inside the docking sleeve 33, one end of which abuts against the front end surface of the seal 35, and the other end abuts against the rear end surface of the container connection portion. A card slot 37 is arranged at the inner rear portion of the docking sleeve 33, and a buckle 27 is arranged at the outer rear portion of the docking seat body 23. The buckle 27 and the card slot 37 are arranged in cooperation with each other. When the dispensing pipette 100 is connected to the liquid transfer manifold 300, they are fixed by snapping.
[0041] The docking sleeve 33 cooperates with the docking seat body 23, so that when the two are in docking state, the docking seat body 23 can be inserted into the docking sleeve 33 and push the seal 35 to slide forward, the spring 36 is compressed in the axial direction, the first needle tube 31 passes through the seal 35 and the sealing plug 24 and enters the first channel 21, and at the same time, the second needle tube 32 passes through the seal 35 and the sealing plug 24 and enters the second channel 22. In the non-docking state, the docking seat body 23 withdraws from the docking sleeve 33, the first needle tube 31 withdraws from the first channel 21 and the sealing plug 24, the second needle tube 32 withdraws from the second channel 22 and the sealing plug 24, and the spring 36 pushes the seal 35 to slide backward, so that the seal 35 re-wraps the rear end openings of the first needle tube 31 and the second needle tube 32.
[0042] The container connecting portion of the liquid transfer communication device 300 includes a connecting and fixing buckle 39, and the connecting and fixing buckle 39 is used to snap-fit and fix the liquid transfer communication device 300 to a medical container or a medical interface.
[0043] The front end of the transfer connection vessel 300 further includes two holding wings 40 extending forward and symmetrically arranged.
[0044] like Figure 2 As shown, for ease of understanding, the dispensing process of the dispensing pipetting assembly and the vial 500 of this embodiment includes:
[0045] (1) Hold the holding wing 40 of the pipetting manifold 300, align the front end of the pipetting manifold 300 with the mouth of the vial 500 and press it in. The connecting buckle 39 is clamped on the neck of the vial 500, and the front end openings of the first needle tube 31 and the second needle tube 32 are inserted into the interior of the vial 500.
[0046] (2) Hold the dispensing pipette 100, align the front end of the docking seat body 23 with the rear end of the docking sleeve 33 of the pipetting connector 300, and push the docking seat body 23 into the docking sleeve 33. At this time, the sliding sleeve 34 moves forward, and the spring 36 is axially compressed until the buckle 27 at the outer rear of the docking seat body 23 is embedded in the groove 37 at the inner rear of the docking sleeve 33.
[0047] (3) Pull the first piston rod 13 backward and push the second piston rod 14 forward. The liquid medicine in the vial 500 passes through the first needle tube 31 and the first channel 21 and enters the first syringe 11. At the same time, the air in the second syringe 12 passes through the second channel 22 and the second needle tube 32 and enters the vial 500.
[0048] (4) Pull out the dispensing pipette 100 backwards. At this time, the spring 36 releases its elastic force axially, and the sliding sleeve 34 is pushed to move backwards relative to the docking sleeve 33 until the sealing member 35 wraps the rear end openings of the first needle tube 31 and the second needle tube 32 again.
[0049] (5) After the preparation of the medicine is completed, the liquid transfer tube 300 and the vial 500 are discarded together.
[0050] It can be seen that the utility model can achieve puncture prevention, leakage prevention, and air pressure balance during the medicine dispensing process, thereby comprehensively improving the safety of medicine dispensing and liquid transfer.
[0051] Second embodiment
[0052] like Figure 3 and Figure 4 As shown, a medicine dispensing pipette 100 and a medicine dispensing pipette assembly thereof according to an embodiment of the present utility model.
[0053] In particular, in this embodiment, the reset structure includes an elastic arm 38 and a groove 28; at least two elastic arms 38 are arranged on the rear side of the sliding sleeve 34, and each elastic arm 38 is radially deflected outward when no external force is applied, and a clearance groove 331 corresponding to the number and position of the elastic arms 38 is arranged on the inner rear part of the docking sleeve 33. When the sealing member 35 is in a position to wrap the rear end openings of the first needle tube 31 and the second needle tube 32, the two elastic arms 38 are naturally opened in each clearance groove 331. The end of the elastic arm 38 is provided with an inward protrusion, and the position of the protrusion and the groove 28 are matched, so that when the sliding sleeve 34 slides forward and the two elastic arms 38 move inward due to extrusion, the protrusion of the elastic arm 38 will be embedded in the groove 28 of the docking seat body 23.
[0054] A limiting boss 333 is provided at the inner rear end of the docking sleeve 33 to prevent the sliding sleeve 34 from being separated from the docking sleeve 33 .
[0055] A guide groove 332 is provided on the inner side of the docking sleeve 33 , and the guide groove 332 is parallel to the sliding direction to prevent the sliding sleeve 34 from rotating in the axial direction.
[0056] It can be seen that the second embodiment of the utility model does not need to use the spring 36, and can also achieve the effects of anti-puncture, anti-leakage and air pressure balance.
[0057] 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 dispensing pipette, characterized in that: It comprises a dual-chamber injection assembly (10) and a liquid transfer channel portion (20); The double-chamber injection assembly (10) is composed of a first injection cylinder (11), a first piston rod (13) that can slide forward and backward along the inner cavity of the first injection cylinder (11), a second injection cylinder (12), and a second piston rod (14) that can slide forward and backward along the inner cavity of the second injection cylinder (12); The transfer channel portion (20) comprises a docking seat body (23) and a sealing plug (24); the docking seat body (23) is connected to the dual-chamber injection assembly (10); a first channel (21) and a second channel (22) are arranged on the front side of the interior of the docking seat body (23); the rear end of the docking seat body (23) connects the first channel (21) to the first injection cylinder (11), and connects the second channel (22) to the second injection cylinder (12); the first channel (21) and the second channel (22) are provided with parallel openings at the front end of the docking seat body (23); the openings of the first channel (21) and the second channel (22) are closed by the sealing plug (24).
2. A dispensing pipette according to claim 1, characterized in that: The first injection cylinder (11) and the second injection cylinder (12) are arranged side by side and in the same direction.
3. A medication dispensing pipette assembly, comprising the medication dispensing pipette (100) according to claim 1 or 2, characterized in that: Also includes a liquid transfer connector (300); The liquid transfer communicating device (300) comprises a container connecting portion, a first needle tube (31), a second needle tube (32), a docking sleeve (33), a sealing member (35) and a reset structure; wherein the container connecting portion is arranged at the front end of the liquid transfer communicating device (300) and is used to be connected to a medical container or an interface, and a through hole is arranged on the rear end surface of the container connecting portion for the first needle tube (31) and the second needle tube (32) to pass through; the docking sleeve (33) is through-through and arranged at the rear end of the liquid transfer communicating device (300), and the front end of the docking sleeve (33) is fixedly connected to the rear end surface of the container connecting portion; the first needle tube (31) and the second needle tube (32) are arranged in parallel in the liquid transfer communicating device (300) and are fixedly connected to the container connecting portion in the form of passing through the rear end surface of the container connecting portion; a sliding sleeve (34) is arranged on the outer side of the sealing member (35) and can be slidably arranged in the docking sleeve (33) in a forward and backward manner; in an initial state, the sealing member (35) wraps the rear end openings of the first needle tube (31) and the second needle tube (32); The docking sleeve (33) and the docking seat body (23) cooperate with each other so that when the two are in a docking state, the docking seat body (23) can be inserted into the docking sleeve (33) and push the sealing member (35) to slide forward, and the first needle tube (31) passes through the sealing member (35) and the sealing plug (24) and enters the first channel (21). At the same time, the second needle tube (32) passes through the sealing member (35) and the sealing plug (24) and enters the second channel (22); in a non-docking state, the docking seat body (23) withdraws from the docking sleeve (33), the first needle tube (31) withdraws from the first channel (21) and the sealing plug (24), the second needle tube (32) withdraws from the second channel (22) and the sealing plug (24), and the reset structure pushes the sealing member (35) to slide backward, so that the sealing member (35) re-wraps the rear end openings of the first needle tube (31) and the second needle tube (32).
4. The pharmaceutical dispensing and liquid transfer assembly according to claim 3, characterized in that: The reset structure comprises a spring (36) which is arranged inside the docking sleeve (33); one end of the spring (36) abuts against the front end surface of the sealing member (35), and the other end abuts against the rear end surface of the container connection portion; When the docking seat body (23) is inserted into the docking sleeve (33), the docking seat body (23) abuts against the rear end of the sliding sleeve (34), pushing the sealing member (35) to slide forward, and the spring (36) is compressed in the axial direction; When the docking seat body (23) is withdrawn from the docking sleeve (33), the spring (36) releases its elastic force in the axial direction, pushing the sealing member (35) to slide backward, and the sealing member (35) re-wraps the rear end openings of the first needle tube (31) and the second needle tube (32).
5. The pharmaceutical dispensing and liquid transfer assembly according to claim 4, characterized in that: The inner rear portion of the docking sleeve (33) is provided with a slot (37), and the outer rear portion of the docking seat body (23) is provided with a buckle (27). The buckle (27) and the slot (37) are arranged in coordination with each other. When the dispensing pipette (100) is connected to the pipetting connector (300), they are fixed by snapping.
6. The pharmaceutical dispensing and liquid transfer assembly according to claim 3, characterized in that: The reset structure comprises an elastic arm (38) and a groove (28); at least two elastic arms (38) are arranged on the rear side of the sliding sleeve (34), and when no external force is applied, each elastic arm (38) is radially deflected outward, and a clearance groove (331) corresponding to the number and position of the elastic arms (38) is arranged on the inner rear part of the docking sleeve (33); When the sealing member (35) is in a position to wrap the rear end openings of the first needle tube (31) and the second needle tube (32), the two elastic arms (38) are naturally opened in the respective clearance grooves (331) correspondingly; An inward protrusion is provided at the end of the elastic arm (38), and the positions of the protrusion and the groove (28) are matched so that when the sliding sleeve (34) slides forward and the two elastic arms (38) move inward due to squeezing, the protrusion of the elastic arm (38) will be embedded in the groove (28) of the docking seat body (23).
7. The pharmaceutical dispensing and liquid transfer assembly according to claim 6, characterized in that: A limiting boss (333) is provided at the inner rear end of the docking sleeve (33) to prevent the sliding sleeve (34) from being separated from the docking sleeve (33).
8. The pharmaceutical dispensing and liquid transfer assembly according to claim 6, characterized in that: A guide groove (332) is provided on the inner side of the docking sleeve (33), and the guide groove (332) is parallel to the sliding direction to prevent the sliding sleeve (34) from rotating in the axial direction.
9. The pharmaceutical dispensing and liquid transfer assembly according to claim 3, characterized in that: The container connecting portion of the liquid transfer communicating device (300) comprises a connecting and fixing buckle (39), and the connecting and fixing buckle (39) is used to snap-fit and fix the liquid transfer communicating device (300) to a medical container or a medical interface.
10. The pharmaceutical dispensing and liquid transfer assembly according to claim 3, characterized in that: The front end of the liquid transfer connecting vessel (300) further comprises two holding wings (40) extending forward and arranged symmetrically.