Telescopic micro-needle injector

Abstract

According to the telescopic micro-needle injector, in the using process, an injection mechanism is located in a needle cylinder, the situation that a needle needs to be installed again when medical workers use the injector is avoided, and therefore the risk that the medical workers are pricked possibly when the needle is installed is reduced. Especially when the injector is used for the first time, the clamping mechanism can effectively fix the injection mechanism, it is guaranteed that the connector of the injector is stable and reliable in the injection process, and medical staff can conveniently and smoothly inject or extract liquid medicine. After injection is completed, the clamping mechanism can relieve fixation of the injection mechanism and is in linkage with the push-pull rod, and therefore the injection mechanism is safely pulled back into the needle cylinder. By means of the design, the needle head of the syringe is prevented from being exposed after being used, and the possibility that medical workers are punctured by the needle head is reduced.

Description

Technical Field

[0001] The invention belongs to the field of syringes, and in particular relates to a retractable micro needle syringe. Background Art

[0002] With the development of medical technology, micro-needle syringes have been widely used in clinical injections, especially in areas that require high-precision injections, such as insulin injections, vaccinations, and precise administration of other liquid drugs. However, most micro-needle syringes on the market still face the following technical challenges:

[0003] In traditional syringe designs, the needle usually needs to be manually installed by medical staff. During this process, medical staff need to touch the needle, which can easily lead to accidental needle pricks, especially during first aid or emergency treatment. Improper operation may lead to puncture injuries and cross-infection risks. Although some designs use protective covers to prevent the needle from being exposed, these designs do not completely avoid contact with the needle during installation and removal, and there is still a certain risk. In the use of traditional syringes, the needle is often exposed after the injection of the liquid medicine. Medical staff are easily pricked by the needle due to negligence when handling the syringe, especially when the syringe needle is discarded or reused, which may cause stabbing incidents and increase the occupational health risks of medical staff.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a retractable micro needle syringe, thereby solving the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] A retractable micro needle syringe comprises: a syringe, a push-pull rod slidably connected to the syringe in the vertical direction, an end of the push-pull rod facing the syringe is fixedly connected to a piston located inside the syringe, and a connector is provided at the front end of the syringe, a sealing seat is slidably connected to the inside of the syringe in the vertical direction, an injection mechanism corresponding to the axis core of the connector is connected below the sealing seat, a clamping mechanism is provided at the axis center of the sealing seat, and the clamping mechanism is used to achieve different clamping connections according to the positions of the push-pull rod and the injection mechanism.

[0008] Optionally, the clamping mechanism includes a fixed seat fixedly connected above the sealing seat, and a positioning seat clamped below the sealing seat, the fixed seat and the positioning seat are fixedly connected to the opposite sides with a first buckle, and an adjustment seat and a combination seat are slidably connected above the inner wall of the syringe and below the push-pull rod respectively, and the adjustment seat and the combination seat are provided with a clamping groove that is compatible with the first buckle on the side facing the sealing seat, and the depth of the clamping groove above the adjustment seat is greater than the depth of the clamping groove below the combination seat.

[0009] Optionally, two second buckles are fixedly connected to the top of the positioning seat, a through groove is formed in the sealing seat from the bottom to the top of the fixing seat, and the second buckles pass through the through groove and abut against the upper surface of the fixing seat.

[0010] Optionally, an extrusion groove corresponding to the through groove is provided at the axis below the assembly seat, and the depth of the extrusion groove is greater than the length of the second buckle extending out of the rear end of the through groove.

[0011] Optionally, a connecting rod with a length shorter than the connecting head is fixedly connected below the adjustment seat, a connecting plate is fixedly connected below the connecting rod, both ends of the upper edge of the connecting plate are fixedly connected to columns, and a nut threadedly connected to the outer wall of the syringe is rotatably connected above the column.

[0012] Optionally, the injection mechanism includes a conical barrel connected to the bottom of the sealing seat, a needle is connected to the bottom of the conical barrel, and the axis core of the needle corresponds to the axis core of the connector.

[0013] Optionally, the inside of the conical cylinder is elastically connected to a baffle for sealing the needle port, one side of the adjustment seat is fixedly connected to a connecting ring sleeved on the outer wall of the needle, a plurality of rod bodies are fixedly connected in a circular arrangement above the connecting ring, and a plurality of straight grooves matching the rod bodies are opened in the vertical direction of the conical cylinder.

[0014] Optionally, a through hole corresponding to the needle axis core is penetrated on the opposite side of the connecting seat, the diameter of the through hole is larger than the diameter of the baffle, a mounting plate is fixedly connected between the inner walls of the through hole, a spring is fixedly connected between the mounting plate and the baffle, and the mounting plate and the baffle are magnetically connected.

[0015] Optionally, two push plates are fixedly connected above the opening of the syringe, a pressure plate is fixedly connected to the upper end of the push-pull rod, and friction patterns are provided above the pressure plate and below the push plate.

[0016] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all the advantages described below at the same time:

[0017] During use of the present invention, the injection mechanism is located inside the syringe, which avoids the need for medical staff to reinstall the needle during use, thereby reducing the risk of being stabbed when installing the needle. Especially when used for the first time, the clamping mechanism can effectively fix the injection mechanism, ensuring that the connector of the syringe is stable and reliable during the injection process, which is convenient for medical staff to smoothly inject or extract the liquid medicine. When the injection is completed, the clamping mechanism will release the fixation of the injection mechanism and work in conjunction with the push-pull rod to safely pull the injection mechanism back into the syringe. This design not only avoids the needle of the syringe from being exposed after use, but also reduces the possibility of medical staff being stabbed by the needle.

[0018] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] In the figure:

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of a needle syringe;

[0022] Figure 2 It is a schematic diagram of the internal three-dimensional structure of the needle syringe;

[0023] Figure 3 This is a schematic diagram of the inner cross-sectional structure of the needle penetrating into the connector;

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure after the baffle and the mounting plate are assembled;

[0025] Figure 5 It is a schematic diagram of the cross-sectional structure of the push-pull rod and the sealing seat;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure above the injection mechanism;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure below the injection mechanism;

[0028] Figure 8 for Figure 2 Schematic diagram of the structure at A in the middle;

[0029] Fig. 9 for Figure 2 Schematic diagram of the structure at B in the middle;

[0030] Fig.10 for Figure 2 Schematic diagram of the structure at point C in the middle.

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 1. Syringe; 2. Push-pull rod; 3. Connector; 4. Sealing seat; 5. Fixed seat; 6. Positioning seat; 7. First buckle; 8. Adjusting seat; 9. Combination seat; 10. Second buckle; 11. Through groove; 12. Extrusion groove; 13. Rod body; 14. Connecting rod; 15. Post; 16. Nut; 17. Conical cylinder; 18. Needle; 19. Connecting ring; 20. Rod body; 21. Straight groove; 22. Through hole; 23. Mounting sheet; 24. Spring; 25. Push plate; 26. Press plate.

[0033] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0034] The present invention will now be described in further detail with reference to the accompanying drawings.

[0035] See also Figure 1-10 As shown, in this embodiment, a retractable micro needle syringe is provided, including a syringe 1, a push-pull rod 2 is slidably connected to the syringe 1 in the vertical direction, a piston located inside the syringe 1 is fixedly connected to the end of the push-pull rod 2 facing the syringe 1, and a connector 3 is provided at the front end of the syringe 1, a sealing seat 4 is slidably connected to the inside of the syringe 1 in the vertical direction, an injection mechanism corresponding to the axis core of the connector 3 is connected below the sealing seat 4, and a clamping mechanism is provided at the axis center of the sealing seat 4, and the clamping mechanism is used to achieve different clamping according to the position of the push-pull rod 2 and the injection mechanism. The sealing seat 4 cooperates with the O-ring to achieve the sealing effect.

[0036] During use of the present invention, the injection mechanism is located inside the syringe 1, which avoids the need for medical staff to reinstall the needle 18 during use, thereby reducing the risk of being stabbed when installing the needle 18. Especially when used for the first time, the snap-fit ​​mechanism can effectively fix the injection mechanism, ensuring that the connector 3 of the syringe is stable and reliable during the injection process, which is convenient for medical staff to smoothly inject or extract the liquid medicine. When the injection is completed, the snap-fit ​​mechanism will release the fixation of the injection mechanism and realize linkage with the push-pull rod 2, thereby safely pulling the injection mechanism back into the syringe 1. This design not only avoids the needle 18 of the syringe from being exposed after use, but also reduces the possibility of medical staff being stabbed by the needle 18.

[0037] It should be noted that: the connection between the push-pull rod 2 and the injection structure ensures that the syringe cannot be fixed to the bottom of the syringe 1 again after the injection is completed, thereby effectively avoiding the secondary use of the syringe. Specifically, once the connection between the push-pull rod 2 and the injection structure is established, the clamping mechanism and fixing mechanism inside the syringe will change, preventing the possibility of re-fixation.

[0038] This design not only ensures the safety of the syringe after each use, but also avoids potential risks caused by repeated use, such as contamination of the drug solution or damage to the needle 18. This function of preventing secondary use further improves the safety and hygiene of the present invention, avoids unnecessary risks to medical staff and patients caused by using expired or improperly used syringes, and ensures that each injection is performed in a brand new and clean state.

[0039] The present invention can also add a cover plate above the syringe 1, and the cover plate will not affect the sliding of the push-pull rod 2, but can prevent the push-pull rod 2 from sliding out of the syringe 1, further improving its safety.

[0040] In this embodiment, the clamping mechanism includes a fixed seat 5 fixedly connected above the sealing seat 4, a positioning seat 6 clamped below the sealing seat 4, and the opposite sides of the fixed seat 5 and the positioning seat 6 are fixedly connected with a first buckle 7. The upper part of the inner wall of the syringe 1 and the lower part of the push-pull rod 2 are slidably connected with an adjustment seat 8 and a combination seat 9, respectively. The adjustment seat 8 and the combination seat 9 are provided with a clamping groove adapted to the first buckle 7 on the side facing the sealing seat 4. A rubber ring can be set between the positioning seat 6 and the sealing seat 4 to maintain the sealing effect.

[0041] It should be noted that in the present application, the positioning seat 6 and the sealing seat 4 are detachably arranged, so that the sealing seat 4 can be fixed after the push-pull rod 2 and the sealing seat 4 are subsequently combined, avoiding the occurrence of motion interference caused by the positioning seat 6 being unable to move.

[0042] In this embodiment, two second buckles 10 are fixedly connected to the top of the positioning seat 6, and a through slot 11 is formed through the sealing seat 4 from the bottom to the top of the fixing seat 5, and the second buckle 10 passes through the through slot 11 and abuts against the upper surface of the fixing seat 5. The first buckle 7 and the second buckle 10 are both elastic plastic structures, and the first buckle 7 and the second buckle 10 are both fixedly connected by a wedge-shaped block at the upper end.

[0043] In this embodiment, an extrusion groove 12 corresponding to the through groove 11 is provided at the axis below the assembly seat 9, and the depth of the extrusion groove 12 is greater than the length of the second buckle 10 extending out of the rear end of the through groove 11. The arrangement of the extrusion groove 12 allows the second buckle 10 to be squeezed after the assembly seat 9 contacts the fixing seat 5, so that the second buckle 10 is deformed in the through groove 11, thereby causing the positioning seat 6 to be separated from the fixing seat 5.

[0044] In this embodiment, a connecting rod 14 having a length less than that of the connecting head 3 is fixedly connected below the adjusting seat 8, a connecting plate is fixedly connected below the connecting rod 14, and both ends of the upper edge of the connecting plate are fixedly connected to a column 15, and a nut 16 threadedly connected to the outer wall of the syringe 1 is rotatably connected above the column 15. An annular groove is provided below the nut 16, and a T-shaped column sliding in the annular groove is fixedly connected above the column 15, and an external thread matching the nut 16 is provided on the outer wall of the syringe 1. When the height needs to be adjusted, the height adjustment can be completed by rotating the thread.

[0045] In this embodiment, the injection mechanism includes a conical cylinder 17 connected to the bottom of the sealing seat 4, and the bottom of the conical cylinder 17 is connected to the needle 18, and the axis of the needle 18 corresponds to the axis of the connector 3. It is characterized in that the inside of the conical cylinder 17 is elastically connected with a baffle 27 for sealing the port of the needle 18, one side of the adjustment seat 8 is fixedly connected with a connecting ring 19 sleeved on the outer wall of the needle 18, and the top of the connecting ring 19 is fixedly connected with a plurality of rod bodies 2013 in a circular arrangement, and a plurality of straight grooves 21 adapted to the rod bodies 2013 are opened in the vertical direction of the conical cylinder 17.

[0046] Through the setting of the rod body 2013, when the adjustment seat 8 and the positioning seat 6 are in contact, the pushing action of the rod body 2013 will cause the baffle 27 to move, thereby exposing the opening of the needle 18, and then canceling the sealing state inside the syringe 1, preparing for the subsequent injection or extraction of the liquid medicine. The sealing state is released, and the liquid medicine can flow out smoothly through the needle 18, thereby realizing a precise injection or extraction process.

[0047] In this embodiment, a through hole 22 corresponding to the axis of the needle 18 is formed on the opposite side of the connection seat, and the diameter of the through hole 22 is larger than the diameter of the baffle 27. A mounting plate 23 is fixedly connected between the inner walls of the through hole 22, and a spring 24 is fixedly connected between the mounting plate 23 and the baffle 27. The arrangement of the spring 24 can prevent the subsequent baffle 27 from moving randomly, and improve the stability of the subsequent baffle 27 when it abuts against the inner wall of the conical cylinder 17. The spring 24 is a conical spring 24, and the baffle 27 and the mounting plate are magnetically connected. The magnetic connection is connected by a magnet, and the magnet is a permanent magnet. The magnetic connection is combined with the effect of the depth of the card slot used by the adjustment seat 8, so that after the first buckle 7 enters the side wall space of the card slot, there is still a margin to continue to move. After the first buckle 7 completely contacts the inner wall of the card slot and the rod body 2013 pushes the push plate 25 along the straight groove 21 to contact the mounting plate, then a connection relationship is generated between the mounting plate and the baffle 27, thereby exposing the opening of the needle 18 to the outside. Moreover, the magnetic connection can generate magnetic force to directly attract the baffle 27 when it is about to contact the installation, and the margin range is larger.

[0048] It should be noted that: by adjusting the depth of the card slot, gravity can be used to achieve fixation in the future, or medical staff can use sterile instruments such as tweezers to pull the needle 18 to achieve the effect of the rod body 2013 pushing the push plate 25. The remaining movement margin can ensure the card connection effect while avoiding the situation where the subsequent rod body 2013 cannot push the baffle 27 to move.

[0049] The first buckle 7 and the second buckle 10 are both composed of a straight rod and a wedge-shaped block. The depth of the slot above the adjustment seat 8 is greater than the depth of the slot below the combination seat 9. The length of the straight rod of the first buckle 7 below the positioning seat 6 is greater than the length of the straight rod of the first buckle 7 above the fixing seat 5. The wedge-shaped blocks are the same in size and shape. By adjusting the depth and the position of the straight rod, a margin can be left for the subsequent movement of the rod body 2013.

[0050] In this embodiment, two push plates 25 are fixedly connected above the opening of the syringe 1, a pressing plate 26 is fixedly connected to the upper end of the push-pull rod 2, and friction patterns are provided above the pressing plate 26 and below the push plate 25. The friction patterns are straight-line structures, and the provision of friction patterns improves the stability of medical staff in holding the syringe.

[0051] Working principle:

[0052] During the use of the present invention, first, the push-pull rod 2 is pushed. Due to the setting of the sealing seat 4 and the baffle 27, the space of the syringe 1 between the sealing seat 4 and the push-pull rod 2 is in a vacuum state. In this way, the medical staff needs to know whether the syringe is used. Then the medical staff continues to push the push-pull rod 2. As the push of the push-pull rod 2, the sealing seat 4 begins to be squeezed and moves to the side close to the connector 3. In this process, the sealing seat 4 will hit the adjustment seat 8. There is a card slot on the adjustment seat 8. When the sealing seat 4 and the adjustment seat 8 are in contact, the first buckle 7 will be squeezed and deformed, and then the first buckle 7 will enter the card slot to firmly fix the position of the adjustment seat 8 and the sealing seat 4.

[0053] At the same time, since the sealing seat 4 has already contacted the bottom of the inner wall, the needle 18 will slide out of the connector 3. At this time, the needle 18 has been released from the original closed state and is ready for injection or extraction of liquid medicine;

[0054] When the adjustment seat 8 and the sealing seat 4 are snapped together, the rod body 2013 will slide into the space of the conical cylinder 17 along the straight groove 21, and push the baffle 27 to move toward the side close to the mounting plate 23, and generate a magnetic connection with the mounting plate 23. Since the baffle 27 cancels the seal of the needle 18, injection or extraction of medicine can be carried out subsequently.

[0055] Among them, after the injection of the medicinal solution is completed, the combination seat 9 at the end of the push-pull rod 2 of the present invention will contact the fixed seat 5 above the sealing seat 4. After the combination seat 9 contacts the fixed seat 5, the second buckle 10 will be squeezed through the through groove 11, and then the second buckle 10 will undergo elastic deformation to cancel the abutment relationship with the fixed seat 5. After the second buckle 10 above the fixed seat 5 slides into the slot of the combination seat 9, the connection between the combination seat 9 and the fixed seat 5 can be realized. At the same time, since the connection relationship between the positioning seat 6 and the adjustment seat 8 has been cancelled, the push-pull rod 2 can pull the positioning seat 6 to slide, thereby avoiding the subsequent needle 18 from stabbing medical staff after the injection is completed.

[0056] The present invention is not limited to the above-mentioned embodiments. Anyone should be aware that any structural changes made under the enlightenment of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the protection scope of the present invention. The technology, shape, and structural parts not described in detail in the present invention are all well-known technologies.

Claims

1. A retractable micro needle syringe, characterized in that: include: A syringe (1) is slidably connected to a push-pull rod (2) in a vertical direction of the syringe (1); one end of the push-pull rod (2) facing the syringe (1) is fixedly connected to a piston located inside the syringe (1); a connector (3) is provided at the front end of the syringe (1); a sealing seat (4) is slidably connected to the inside of the syringe (1) in a vertical direction; an injection mechanism corresponding to the axis core of the connector (3) is connected below the sealing seat (4); a clamping mechanism is provided at the axis center of the sealing seat (4); the clamping mechanism is used to achieve different clamping according to the positions of the push-pull rod (2) and the injection mechanism.

2. A retractable micro needle syringe according to claim 1, characterized in that: The clamping mechanism comprises a fixed seat (5) fixedly connected above the sealing seat (4), a positioning seat (6) clamped below the sealing seat (4), first buckles (7) fixedly connected to opposite sides of the fixed seat (5) and the positioning seat (6), an adjustment seat (8) and a combination seat (9) slidably connected above the inner wall of the syringe (1) and below the push-pull rod (2), respectively, the adjustment seat (8) and the combination seat (9) are provided with a clamping groove matched with the first buckle (7) on the side facing the sealing seat (4), and the depth of the clamping groove above the adjustment seat (8) is greater than the depth of the clamping groove below the combination seat (9).

3. A retractable micro needle syringe according to claim 1, characterized in that: Two second buckles (10) are fixedly connected to the top of the positioning seat (6); a through groove (11) is provided on the sealing seat (4) from the bottom to the top of the fixing seat (5); and the second buckle (10) passes through the through groove (11) and abuts against the upper surface of the fixing seat (5); and an extrusion groove (12) corresponding to the through groove (11) is provided at the shaft core below the assembly seat (9).

4. A retractable micro needle syringe according to claim 1, characterized in that: A connecting rod (14) having a length less than that of the connecting head (3) is fixedly connected below the adjusting seat (8), a connecting plate is fixedly connected below the connecting rod (14), both ends of the upper edge of the connecting plate are fixedly connected to upright posts (15), and a nut (16) threadedly connected to the outer wall of the syringe (1) is rotatably connected above the upright post (15).

5. The retractable micro needle syringe according to claim 1, characterized in that: The injection mechanism comprises a conical cylinder (17) connected to the bottom of the sealing seat (4), a needle (18) is connected to the bottom of the conical cylinder (17), and the axis of the needle (18) corresponds to the axis of the connector (3).

6. A retractable micro needle syringe according to claim 1, characterized in that: A baffle (27) for sealing the port of the needle (18) is elastically connected inside the conical cylinder (17); a connecting ring (19) sleeved on the outer wall of the needle (18) is fixedly connected to one side of the adjustment seat (8); a plurality of rod bodies (20) (13) are fixedly connected in an annular arrangement above the connecting ring (19); and a plurality of straight grooves (21) adapted to the rod bodies (20) (13) are provided in the vertical direction of the conical cylinder (17).

7. A retractable micro needle syringe according to claim 1, characterized in that: A through hole (22) corresponding to the axis core of the needle (18) is formed through the opposite side of the connection seat, the diameter of the through hole (22) is larger than the diameter of the baffle (27), a mounting plate (23) is fixedly connected between the inner walls of the through hole (22), a spring (24) is fixedly connected between the mounting plate (23) and the baffle (27), and the mounting plate (23) and the baffle (27) are magnetically connected.

8. The retractable micro needle syringe according to claim 1, characterized in that: Two push plates (25) are fixedly connected above the opening of the syringe (1), a pressing plate (26) is fixedly connected to the upper end of the push-pull rod (2), and friction patterns are arranged above the pressing plate (26) and below the push plate (25).

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