Extension tube connecting assembly of injector for pumping injection
By setting threaded teeth on the outside of the syringe needle and threaded grooves on the inside of the sleeve for threaded connection, combined with the design of the sealing disc and telescopic rod, the problem of unstable connection between the extension tube and the syringe is solved, and the continuity and stability of drug delivery are achieved.
Patent Information
- Application Number
- CN202423024049.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2034-12-06
AI Technical Summary
In the existing technology, the connection between the extension tube and the syringe is unstable and is prone to loosening or falling off, which affects the continuity and stability of drug delivery.
By setting threaded teeth on the outside of the syringe needle and using the threaded connection between the threaded groove on the inside of the sleeve and the threaded teeth on the outside of the needle, combined with the sealing device sealing disc and telescopic rod design in the buffer, a stable connection and sealing of the syringe and extension tube can be achieved.
This improves the connection stability between the syringe and the extension tube, ensuring the continuity and stability of drug delivery and reducing the possibility of outside air entering the extension tube.
Smart Images
Figure CN223887204U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical devices, specifically relating to an extension tube connection assembly for a pump-injection syringe. Background Technology
[0002] With the development of medical technology, infusion pump technology has been widely used in clinical treatment, especially in situations requiring precise control of drug delivery rate and dosage, where infusion pumps have become indispensable equipment. An infusion pump delivers medication precisely into the patient's body at a set dose and rate by pushing the liquid medication within the syringe. To ensure smooth drug delivery, an extension tube is usually attached to the needle end of the syringe. The other end of the extension tube is connected to an indwelling needle, through which the medication is injected into the patient. The extension tube not only extends the path of drug delivery but also facilitates drug delivery by doctors and nurses when the patient's position changes.
[0003] In practical applications, after the syringe is loaded with medication, it is attached to an infusion pump. The pump slowly pushes the piston rod to deliver the medication to the patient at a predetermined rate. However, because the pumping time for each dose is relatively long, and the patient may turn over or move during treatment, the connection between the extension tube and the syringe needle may become loose or detached, leading to interruption of medication delivery and affecting the treatment effect. Therefore, the existing technology suffers from the problem of unstable connection between the extension tube and the syringe, which is prone to loosening or detachment, thus affecting the continuity and stability of medication delivery. Utility Model Content
[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an extension tube connection assembly for a pump injection syringe, which solves the problem that the connection between the extension tube and the syringe is unstable, easily loosened or detached, thus affecting the continuity and stability of drug delivery.
[0005] The objective of this utility model can be achieved through the following technical solutions:
[0006] An extension tube connection assembly for a pumping syringe includes a syringe and an extension tube, wherein the syringe is provided with a needle;
[0007] The outer peripheral wall of the needle is provided with spirally distributed thread teeth;
[0008] A buffer cylinder is fixed at one end of the extension tube. The buffer cylinder is a hollow, sealed shell. The extension tube and the buffer cylinder are connected through the interior. A sealing disc is slidably connected inside the buffer cylinder and placed in the same direction. The diameter of the sealing disc is smaller than the diameter of the inner circumferential wall of the buffer cylinder. A circular through hole is opened at the end of the buffer cylinder away from the extension tube and placed in the same direction as the sealing disc. The diameter of the circular through hole is equal to the diameter of the sealing disc.
[0009] The buffer cylinder is fixed with a sleeve with both ends open at the end away from the extension tube. The sleeve and the through hole are placed on the same axis. The inner peripheral wall of the sleeve has a threaded groove that matches the thread teeth. The sleeve is threaded onto the needle head. The diameter of the inner peripheral wall of the sleeve is smaller than the diameter of the through hole, and the diameter of the outer peripheral wall of the sleeve is larger than the diameter of the through hole.
[0010] The principle and effect of the above technical solution are as follows:
[0011] The threaded connection between the inner threaded groove of the sleeve and the outer threaded teeth of the needle improves the stability of the connection between the syringe and the extension tube, prevents the extension tube from loosening or falling off the needle during pumping, and ensures the continuity and stability of drug delivery.
[0012] During pump injection, the sealing disc slides out from the through hole into the buffer cylinder. At this time, the pumped liquid can be discharged from the needle of the syringe into the buffer cylinder, and pass through the gap between the sealing disc and the inner peripheral wall of the buffer cylinder, and finally enter the extension tube.
[0013] Once the medication in the syringe has been pumped out, rotate the syringe to separate the syringe from the sleeve, thus separating the syringe from the extension tube. At this point, slide the sealing disc into the through hole to seal the through hole, effectively reducing the amount of outside air entering the extension tube.
[0014] A fixing strip is fixedly connected inside the buffer cylinder. The fixing strip is located at the end of the sealing disc away from the sleeve. A telescopic rod is fixed on the fixing strip and is horizontally oriented towards the sealing disc. The telescopic rod is fixedly connected to the sealing disc. When the telescopic rod is fully extended, the sealing disc is located inside the through hole. When the telescopic rod is fully extended or retracted, the sealing disc is completely located inside the buffer cylinder.
[0015] The thread teeth are located near the middle of the needle tip. When the sleeve thread is fitted onto the needle tip, one end of the needle tip extends into the buffer cylinder.
[0016] A pair of symmetrically placed support blocks are fixed near the sleeve end of the sealing disc. The distance between the two support blocks is less than the diameter of the outer peripheral wall of the needle, and the distance between the two support blocks is greater than the diameter of the inner peripheral wall of the needle.
[0017] A spring is fitted onto the telescopic rod, with both ends of the spring fixed to the fixing bar and the sealing plate, respectively. The spring is always in a compressed state.
[0018] When the fixing strip is in contact with the sleeve near the end of the buffer cylinder, the sealing disc is completely located inside the through hole.
[0019] The explanations of the nouns, conjunctions, or adjectives used in the above technical solutions are as follows:
[0020] Fixed connection: refers to the process of connecting two separate profiles or parts into a complex part or component using fasteners such as screws, bolts and rivets.
[0021] Threaded connection: refers to the connection and fixation between objects through the interlocking of threads.
[0022] The beneficial effects of this utility model are:
[0023] 1. The threaded connection between the inner thread groove of the sleeve and the outer thread teeth of the needle improves the stability of the connection between the syringe and the extension tube, prevents the extension tube from loosening or falling off the needle during pumping, and ensures the continuity and stability of drug delivery.
[0024] Once the medication in the syringe has been pumped out, rotate the syringe to separate the syringe from the sleeve, thus separating the syringe from the extension tube. At this point, slide the sealing disc into the through hole to seal the through hole, effectively reducing the amount of outside air entering the extension tube.
[0025] 2. By setting up the telescopic rod and fixing strip, the guiding performance of the sealing disc during movement is improved. With the setting of the support block and spring, when the syringe is connected to the sleeve, the needle can automatically push the support block to move the sealing disc out of the through hole; when the syringe is separated from the sleeve, the compressed spring pushes the sealing disc to immediately extend into the through hole for sealing. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0028] Figure 2 This is a schematic diagram of the needle tip part of the present invention;
[0029] Figure 3 This is a schematic diagram of the sleeve portion of this utility model;
[0030] Figure 4 This is a schematic diagram of the spring portion of this utility model. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0032] This combination Figures 1 to 4 This describes an embodiment of an extension tube connection assembly for a pump-feed syringe. Specifically, the extension tube connection assembly for the pump-feed syringe is constructed as a split structure, comprising components such as a syringe 100, an extension tube 200, a needle 101, threaded teeth 102, a buffer cylinder 300, a through hole 301, a sealing disc 400, a sleeve 500, and a threaded groove 501. The threaded connection between the inner threaded groove 501 of the sleeve 500 and the outer threaded teeth 102 of the needle 101 improves the stability of the connection between the syringe 100 and the extension tube 200 and avoids... During the pump-free process, the extension tube 200 may loosen or detach from the needle 101, ensuring the continuity and stability of the drug delivery. When the drug in the syringe 100 has been pumped out, rotate the syringe 100 to spirally separate the syringe 100 from the sleeve 500, thus separating the syringe 100 from the extension tube 200. At this time, the sealing disc 400 slides into the through hole 301, sealing the through hole 301 and effectively reducing the entry of outside air into the extension tube 200.
[0033] Please refer to Figures 1 to 4 An extension tube connection assembly for a pump injection syringe includes a syringe 100 and an extension tube 200, wherein the syringe 100 is provided with a needle 101.
[0034] The outer peripheral wall of the needle 101 is provided with spirally distributed threaded teeth 102;
[0035] One end of the extension tube 200 is fixed with a buffer cylinder 300. The buffer cylinder 300 is a hollow, sealed shell. The extension tube 200 and the buffer cylinder 300 are connected through the interior. A sealing disc 400 is slidably connected inside the buffer cylinder 300 and placed coaxially. The diameter of the sealing disc 400 is smaller than the diameter of the inner circumferential wall of the buffer cylinder 300. A through hole 301 is opened at the end of the buffer cylinder 300 away from the extension tube 200 and is placed coaxially with the sealing disc 400. The diameter of the through hole 301 is equal to the diameter of the sealing disc 400.
[0036] The buffer cylinder 300 is fixed with a sleeve 500 with both ends open at the end away from the extension tube 200. The sleeve 500 is placed coaxially with the through hole 301. The inner peripheral wall of the sleeve 500 is provided with a threaded groove 501 that matches the threaded teeth 102. The sleeve 500 is threaded onto the needle 101. The diameter of the inner peripheral wall of the sleeve 500 is smaller than the diameter of the through hole 301, and the diameter of the outer peripheral wall of the sleeve 500 is larger than the diameter of the through hole 301.
[0037] The threaded connection between the inner threaded groove 501 of the sleeve 500 and the outer threaded tooth 102 of the needle 101 improves the stability of the connection between the syringe 100 and the extension tube 200, prevents the extension tube 200 from loosening or falling off the needle 101 during the pumping process, and ensures the continuity and stability of the drug delivery.
[0038] During pump injection, the sealing disc 400 is slid out from the through hole 301 into the buffer cylinder 300. At this time, the pumped liquid can be discharged from the needle 101 of the syringe 100 into the buffer cylinder 300, and pass through the gap between the sealing disc 400 and the inner peripheral wall of the buffer cylinder 300, and finally enter the extension tube 200.
[0039] When the medicine in the syringe 100 has been pumped out, rotate the syringe 100 to separate the syringe 100 from the sleeve 500, thus separating the syringe 100 from the extension tube 200. At this time, the sealing disc 400 slides into the through hole 301, and the through hole 301 is sealed by the sealing disc 400, effectively reducing the amount of outside air entering the extension tube 200.
[0040] To improve the guiding performance of the sealing disc 400 during movement, a fixing strip 600 is fixedly connected inside the buffer cylinder 300. The fixing strip 600 is located at the end of the sealing disc 400 away from the sleeve 500. A telescopic rod 700, horizontally facing the sealing disc 400, is fixed on the fixing strip 600. The telescopic rod 700 is fixedly connected to the sealing disc 400. When the telescopic rod 700 is fully extended, the sealing disc 400 is located inside the through hole 301. When the telescopic rod 700 is fully extended or retracted, the sealing disc 400 is completely located inside the buffer cylinder 300. The telescopic rod 700 and the fixing strip 600 improve the guiding performance of the sealing disc 400 during movement.
[0041] The threaded tooth 102 is located near the middle section of the needle 101. When the sleeve 500 is threaded onto the needle 101, one end of the needle 101 extends into the buffer cylinder 300. When the needle 101 and the sleeve 500 are threadedly connected, the sealing disc 400 is automatically pushed into the buffer cylinder 300.
[0042] A pair of symmetrically placed support blocks 800 are fixed to the end of the sealing disc 400 near the sleeve 500. The distance between the two support blocks 800 is less than the outer peripheral diameter of the needle 101, and the distance between the two support blocks 800 is greater than the inner peripheral diameter of the needle 101. When the needle 101 is threadedly connected to the sleeve 500, the end of the needle 101 abuts against the support block 800, and pushes the support block 800 and the sealing disc 400 through the needle 101. Through the arrangement of the two support blocks 800, the medicine can overflow from the needle 101 between the two support blocks 800, avoiding the sealing disc 400 from blocking the needle 101 and affecting the pumping effect of the medicine.
[0043] When the syringe 100 is separated from the sleeve 500, in order to facilitate the sealing disc to seal the through hole 301 in a timely manner, a spring 900 is sleeved on the telescopic rod 700. The two ends of the spring 900 are fixed to the fixing strip 600 and the sealing disc 400 respectively. The spring 900 is always in a compressed state. The compressed spring 900 pushes the sealing disc to immediately extend into the through hole 301 for sealing.
[0044] When the fixing strip 600 and the sleeve 500 are in contact with the end of the buffer cylinder 300, the sealing plate 400 is completely located inside the through hole 301, ensuring an effective sealing effect.
[0045] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims of this utility model.
Claims
1. An extension tube connection assembly for a pump-injection syringe, comprising a syringe (100) and an extension tube (200), wherein the syringe (100) is provided with a needle (101), characterized in that: The outer peripheral wall of the needle (101) is provided with spirally distributed thread teeth (102); One end of the extension tube (200) is fixed with a buffer cylinder (300). The buffer cylinder (300) is a hollow sealed shell. The extension tube (200) and the buffer cylinder (300) are connected through the interior. A sealing disc (400) is slidably connected inside the buffer cylinder (300) and placed in the same direction. The diameter of the sealing disc (400) is smaller than the diameter of the inner circumferential wall of the buffer cylinder (300). A through hole (301) is opened at the end of the buffer cylinder (300) away from the extension tube (200) and is placed in the same direction as the sealing disc (400). The diameter of the through hole (301) is equal to the diameter of the sealing disc (400). A sleeve (500) with both ends open is fixed at the end of the buffer cylinder (300) away from the extension tube (200). The sleeve (500) and the through hole (301) are placed on the same axis. The inner peripheral wall of the sleeve (500) is provided with a thread groove (501) that matches the thread teeth (102). The sleeve (500) is threaded onto the needle (101). The diameter of the inner peripheral wall of the sleeve (500) is smaller than the diameter of the through hole (301), and the diameter of the outer peripheral wall of the sleeve (500) is larger than the diameter of the through hole (301).
2. The extension tube connection assembly for a pump-injection syringe according to claim 1, characterized in that, A fixing strip (600) is fixedly connected inside the buffer cylinder (300). The fixing strip (600) is located at the end of the sealing disc (400) away from the sleeve (500). A telescopic rod (700) is fixed on the fixing strip (600) and is horizontally oriented towards the sealing disc (400). The telescopic rod (700) is fixedly connected to the sealing disc (400). When the telescopic rod (700) is fully extended, the sealing disc (400) is located inside the through hole (301). When the telescopic rod (700) is fully extended, the sealing disc (400) is completely located inside the buffer cylinder (300).
3. The extension tube connection assembly for a pump-injection syringe according to claim 2, characterized in that, The threaded teeth (102) are located near the middle of the needle (101). When the sleeve (500) is threaded onto the needle (101), one end of the needle (101) extends into the buffer cylinder (300).
4. The extension tube connection assembly for a pump-injection syringe according to claim 3, characterized in that, A pair of symmetrically placed support blocks (800) are fixed on the end of the sealing disc (400) near the sleeve (500). The distance between the two support blocks (800) is less than the diameter of the outer peripheral wall of the needle (101), and the distance between the two support blocks (800) is greater than the diameter of the inner peripheral wall of the needle (101).
5. The extension tube connection assembly for a pump-injection syringe according to claim 4, characterized in that, A spring (900) is fitted on the telescopic rod (700). The two ends of the spring (900) are fixed to the fixing strip (600) and the sealing plate (400) respectively. The spring (900) is always in a compressed state.
6. The extension tube connection assembly for a pump-injection syringe according to claim 5, characterized in that, When the fixing strip (600) and the sleeve (500) are in contact with the end of the buffer cylinder (300), the sealing plate (400) is completely located inside the through hole (301).