Prefilled flushing syringe

Abstract

The utility model discloses a prefilled flush tube syringe, which relates to the technical field of medical devices, and comprises an outer tube body, wherein a liquid storage tube is fixedly connected to the middle of the inner side of the outer tube body, a puncture needle is fixedly connected to the middle of the inner lower surface of the liquid storage tube, a piston mechanism is fixedly connected to the outer wall of the outer tube body near the upper side, a contraction mechanism is movably sleeved to the outer wall of the outer tube body near the middle, and a sealing plug is movably sleeved to the inner side of the outer tube body near the upper end. The prefilled flush tube syringe described in the utility model fixes the injection needle to the inner side of the outer tube body by means of a clamping claw located on the upper side, and a fixing ring fixes the threaded sleeve, so that the piston rod is fixed, so that the piston rod is fixed to the inner side of the outer tube body, so that the injection needle and the piston rod are protected by the outer tube body, and external influences are avoided to cause them to be stressed, which affects the storage of the syringe.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a prefilled flushing syringe. Background Art

[0002] A syringe is a commonly used medical device used for subcutaneous injections and intravenous infusions. A syringe can be used to inject a small amount of liquid into an inaccessible area or draw it out from certain narrow areas. When the push rod is pulled out, the liquid is sucked in from the small hole at the front end of the syringe, and when the push rod is pushed in, the liquid is squeezed out.

[0003] Chinese patent document CN219398497U discloses a prefilled syringe, which relates to the technical field of medical syringes; it comprises a syringe, which is cylindrically arranged, with a liquid medicine cavity provided inside the syringe, the liquid medicine cavity is filled with liquid medicine, a liquid outlet is arranged at the left end of the syringe, a rotating cover is movably installed outside the liquid outlet at the left end of the syringe, a spike portion is fixedly installed inside the rotating cover, a connecting port is fixedly connected to the left end of the rotating cover, an extension tube is arranged at the left end of the connecting port, a needle seat is arranged at one end of the extension tube away from the connecting port, a steel needle and a needle handle are installed on the needle seat, and a push rod is movably installed inside the right side of the syringe, one end of the push rod passes through the inside of the syringe and extends outward, so that when the medicine in the syringe needs to be used, the needle cover on the needle seat can be directly pulled out, and after piercing into the patient's blood vessel, the push rod can be directly pressed to inject the medicine, thereby achieving the effect of rapid injection of medicine in emergency rescue.

[0004] The existing technology has the following problems:

[0005] The needle seat for injection at the front end of the syringe is exposed, and due to the effect of the extension tube, the extension tube itself may be twisted or the sealing cap on the outside of the needle seat may fall off when the syringe is stored, thereby causing damage to functional components or external contamination. At the same time, the push rod is located on the outside as a whole, and the ear plate is not fixed, which may cause the ear plate to loosen and easily cause it to be pushed by external force during storage. Utility Model Content

[0006] The utility model provides a prefilled flushing syringe to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A prefilled flush syringe comprises an outer tube body, a liquid storage tube is fixedly connected to the middle part of the inner side of the outer tube body, a puncture needle is fixedly connected to the middle part of the inner lower surface of the liquid storage tube, a piston mechanism is fixedly connected to the outer wall of the outer tube body near the upper side, a contraction mechanism is movably sleeved to the outer wall of the outer tube body near the middle part, and a sealing plug is movably sleeved to the inner side of the outer tube body near the upper end.

[0009] Preferably, the piston mechanism includes a threaded sleeve, the inner side thread of the threaded sleeve is connected to the outer wall of the outer tube body near the upper end, the lower side of the threaded sleeve is rotatably connected to a mechanism ring, the inner side of the mechanism ring is fixedly connected to a piston rod through a circular plate, the outer wall of the piston rod near the lower end is movably sleeved on the inner side of the liquid storage tube near the upper side, the lower side of the piston rod is fixedly connected to a medicine storage bag, and a receiving groove is provided in the middle of the lower surface of the piston rod.

[0010] Preferably, a fixing ring is fixedly sleeved on the outer wall of the outer tube body near the upper end, and the lower side of the fixing ring is fixedly connected to the upper surface of the threaded sleeve through a thin column.

[0011] Preferably, the outer wall of the threaded sleeve is provided with friction patterns.

[0012] Preferably, the tightening mechanism includes a clamping ring, the inner side of which is movably sleeved on the middle part of the outer wall of the outer tube body, and two push buttons symmetrically distributed on the left and right sides of the clamping ring are fixedly connected, and four claws symmetrically distributed on the left and right sides of the outer tube body are fixedly connected near the bottom, and limiting grooves are provided on the inner sides of the two push buttons, and the outer sides of the claws located on the upper side are movably sleeved on the inner sides of the limiting grooves.

[0013] Preferably, top plates are fixedly connected to left and right sides of the outer wall of the outer tube body near the bottom end.

[0014] Preferably, the inner side of the clamping ring is fixedly connected to a mounting plate via a cylinder, and the mounting plate is located between the inner side of the outer tube body and the outer side of the liquid storage tube, an injection needle is fixedly connected to the lower side of the mounting plate, and a hose is fixedly connected between a position near the left side of the lower side of the liquid storage tube and a position in the middle of the upper side of the mounting plate.

[0015] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0016] The utility model provides a prefilled flushing syringe, which adopts the cooperation of a fixing ring, a threaded sleeve, a mechanism ring, a piston rod, a contraction mechanism, a clamping ring, a push button, a clamping claw, a limiting groove, a mounting plate, a hose, an injection needle and an outer tube body. The injection needle is fixed to the inner side of the outer tube body by the clamping claw located on the upper side, and the fixing ring fixes the threaded sleeve so that the piston rod is fixed, and the piston rod is fixed to the inner side of the outer tube body, so that the outer tube body protects the injection needle and the piston rod, and avoids external influences causing them to be subjected to force, which affects the storage of the syringe.

[0017] The utility model provides a prefilled flush tube syringe, which adopts the cooperation of a gathering mechanism, a clamping ring, a push button, a clamping claw, a limiting groove, a top plate, a mounting plate, a hose, an injection needle, a piston mechanism, a threaded sleeve, a mechanism ring, a piston rod, a medicine storage bag and a containing groove. By pushing the push button, the clamping claw located at the lower side is movably sleeved into the inner side of the limiting groove, so that the injection needle is pushed out, and the threaded sleeve is rotated so that the threaded sleeve can be separated from the part where the thread exists on the outer side of the outer tube body, and then the threaded sleeve is pushed to push out the medicine liquid. The utility model has the advantages of convenient operation, fast injection, shortened preparation time before injection, and improved injection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of the utility model;

[0020] Figure 3 It is a partial cross-sectional three-dimensional structural schematic diagram of the piston mechanism of the utility model;

[0021] Figure 4 For this utility model Figure 2 A schematic diagram of the enlarged structure of the middle A part;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the clamping ring part of the utility model.

[0023] In the figure: 1. outer tube body; 2. liquid storage tube; 3. puncture needle; 4. piston mechanism; 41. threaded sleeve; 42. mechanism ring; 43. piston rod; 44. medicine storage bag; 45. receiving groove; 46. fixing ring; 5. closing mechanism; 51. clamping ring; 52. push button; 53. claw; 54. limiting groove; 55. top plate; 56. mounting plate; 57. hose; 58. injection needle; 6. sealing plug. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] like Figure 1 , Figure 2 As shown, a prefilled flush tube syringe comprises an outer tube body 1, a liquid storage tube 2 is fixedly connected to the middle part of the inner side of the outer tube body 1, a puncture needle 3 is fixedly connected to the middle part of the inner lower surface of the liquid storage tube 2, a piston mechanism 4 is fixedly connected to the outer wall of the outer tube body 1 near the upper side, a contraction mechanism 5 is movably sleeved on the outer wall of the outer tube body 1 near the middle part, and a sealing plug 6 is movably sleeved on the inner side of the outer tube body 1 near the upper end.

[0026] It should be noted that the sealing plug 6 is used to seal the inner opening of the outer tube body 1, and the interior of the liquid storage tube 2 is pre-filled with physiological saline.

[0027] like Figure 2 , Figure 3 As shown, the piston mechanism 4 includes a threaded sleeve 41, the inner side of the threaded sleeve 41 is threadedly connected to the outer wall of the outer tube body 1 near the upper end, the lower side of the threaded sleeve 41 is rotatably connected to a mechanism ring 42, the inner side of the mechanism ring 42 is fixedly connected to a piston rod 43 through a circular plate, the outer wall of the piston rod 43 near the lower end is movably sleeved on the inner side of the liquid storage tube 2 near the upper side, the lower side of the piston rod 43 is fixedly connected to a medicine storage bag 44, and a receiving groove 45 is provided in the middle of the lower surface of the piston rod 43.

[0028] It should be noted that, by rotating the threaded sleeve 41, the threaded sleeve 41 is separated from the threaded portion on the outside of the outer tube body 1, and then the threaded sleeve 41 is pushed, causing the threaded sleeve 41 to push the mechanism ring 42, so that the mechanism ring 42 moves downward, and the mechanism ring 42 drives the piston rod 43 to move downward, causing the piston rod 43 to push out the saline solution, and the medicine storage bag 44 contacts the puncture needle 3 and is punctured. The interior of the medicine storage bag 44 is filled with liquid medicine for injection, and the piston rod 43 continues to push out the internal mixture of saline and liquid medicine to achieve the purpose of injection. The receiving groove 45 is used to accommodate the puncture needle 3 to prevent the puncture needle 3 from affecting the movement of the piston rod 43.

[0029] like Figure 2 , Figure 3 As shown, a fixing ring 46 is fixedly sleeved on the outer wall of the outer tube body 1 near the upper end, and the lower side of the fixing ring 46 is fixedly connected to the upper surface of the threaded sleeve 41 through a thin column.

[0030] It should be noted that the fixing ring 46 and the thin column are both made of polyethylene material. The fixing ring 46 is used to fix the threaded sleeve 41 to prevent the threaded sleeve 41 from loosening so that the drug solution is pushed out when it is not needed.

[0031] like Figure 3 As shown, the outer wall of the threaded sleeve 41 is provided with friction lines.

[0032] It should be noted that the friction pattern is used to increase the friction between the hand and the threaded sleeve 41 , making it easier for the user to rotate or push the threaded sleeve 41 .

[0033] like Figure 2 , Figure 4 and Figure 5As shown, the closing mechanism 5 includes a clamping ring 51, the inner side of the clamping ring 51 is movably sleeved on the middle part of the outer wall of the outer tube body 1, and two push buttons 52 symmetrically distributed on the left and right sides of the clamping ring 51 are fixedly connected, and four symmetrical claws 53 are fixedly connected to the left and right sides of the outer tube body 1 near the bottom, and the inner sides of the two push buttons 52 are provided with limiting grooves 54, and the outer sides of the claws 53 located on the upper side are movably sleeved on the inner sides of the limiting grooves 54.

[0034] It should be noted that when the claw 53 is movably sleeved on the inner side of the limiting groove 54, the push button 52 is fixed. When subjected to a large thrust, the claw 53 can be twisted, causing the push button 52 to move downward. However, due to the limitation of the claw 53, the push button 52 cannot move upward.

[0035] like Figure 2 As shown, top plates 55 are fixedly connected to the left and right sides of the outer wall of the outer tube body 1 near the bottom end.

[0036] It should be noted that when the claw 53 located at the lower side is movably sleeved into the inner side of the limiting groove 54, the top plate 55 limits the push button 52, so that the push button 52 cannot continue to move downward, so that the position of the push button 52 is fixed.

[0037] like Figure 2 , Figure 5 As shown, the inner side of the clamping ring 51 is fixedly connected to a mounting plate 56 via a cylinder, and the mounting plate 56 is located between the inner side of the outer tube body 1 and the outer side of the liquid storage tube 2, an injection needle 58 is fixedly connected to the lower side of the mounting plate 56, and a hose 57 is fixedly connected between a position near the left side of the lower side of the liquid storage tube 2 and a position in the middle of the upper side of the mounting plate 56.

[0038] It should be noted that the hose 57 connects the interior of the liquid storage tube 2 and the injection needle 58, so that the drug solution moves from the hose 57 to the injection needle 58. A protective cover is provided on the outside of the injection needle 58 to prevent external bacteria from contaminating the syringe when it is stored.

[0039] The working principle of the utility model is as follows: first, when the claw 53 is movably sleeved on the inner side of the limiting groove 54, the push button 52 is fixed, so that the clamping ring 51 is fixed, so that the injection needle 58 is fixed on the inner side of the outer tube body 1, the fixing ring 46 and the thin column are made of polyethylene material, the fixing ring 46 is used to fix the threaded sleeve 41 to prevent the threaded sleeve 41 from loosening, so that the liquid medicine is pushed out when it is not needed, and the injection needle 58 is fixed on the inner side of the outer tube body 1 by the claw 53 located on the upper side, and the fixing ring 46 fixes the threaded sleeve 41. The threaded sleeve 41 fixes the piston rod 43 so that the piston rod 43 is fixed to the inner side of the outer tube body 1, so that the outer tube body 1 protects the injection needle 58 and the piston rod 43 to avoid external influences that cause stress to affect the storage of the syringe. Finally, the claw 53 can be twisted under a large thrust, so that the push button 52 can move downward. Due to the restriction of the claw 53, the push button 52 cannot move upward. When the claw 53 located at the lower side is movably sleeved into the inner side of the restriction groove 54, the top plate 55 restricts the push button 52. The push button 52 cannot be moved down further, so that the position of the push button 52 is fixed, and the threaded sleeve 41 is rotated to cause the threaded sleeve 41 to be separated from the threaded portion on the outside of the outer tube body 1, and then the threaded sleeve 41 is pushed, so that the threaded sleeve 41 pushes the mechanism ring 42, so that the mechanism ring 42 moves down, and the mechanism ring 42 drives the piston rod 43 to move down, so that the piston rod 43 pushes out the saline solution, and the medicine storage bag 44 contacts the puncture needle 3 and is punctured, and the inside of the medicine storage bag 44 is filled with liquid medicine for injection, and the piston rod 43 continues to push the saline solution inside. The mixed liquid with the medicine is pushed out to achieve the injection purpose. The accommodating groove 45 is used to accommodate the puncture needle 3 to prevent the puncture needle 3 from affecting the movement of the piston rod 43. By pushing the push button 52, the claw 53 located on the lower side is movably sleeved into the inner side of the limiting groove 54, so that the injection needle 58 is pushed out, and the threaded sleeve 41 is rotated so that the threaded sleeve 41 can be separated from the part where the thread exists on the outside of the outer tube body 1, and then the threaded sleeve 41 is pushed to push the medicine out. The operation is convenient and the injection is fast, which shortens the preparation time before injection and improves the injection efficiency.

[0040] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A prefilled flush syringe, comprising an outer tube body (1), characterized in that: A liquid storage tube (2) is fixedly connected to the middle of the inner side of the outer tube body (1), a puncture needle (3) is fixedly connected to the middle of the inner lower surface of the liquid storage tube (2), a piston mechanism (4) is fixedly connected to the outer wall of the outer tube body (1) near the upper side, a contraction mechanism (5) is movably sleeved to the outer wall of the outer tube body (1) near the middle, and a sealing plug (6) is movably sleeved to the inner side of the outer tube body (1) near the upper end; The tightening mechanism (5) comprises a clamping ring (51), the inner side of which is movably sleeved on the middle part of the outer wall of the outer tube body (1), two push buttons (52) symmetrically distributed on the left and right sides of the clamping ring (51) are fixedly connected, and four symmetrical claws (53) are fixedly connected on the left and right sides of the outer tube body (1) near the bottom, and the inner sides of the two push buttons (52) are provided with limiting grooves (54), and the outer sides of the claws (53) located on the upper side are movably sleeved on the inner sides of the limiting grooves (54).

2. A prefilled flush syringe according to claim 1, characterized in that: The piston mechanism (4) comprises a threaded sleeve (41), the inner side of the threaded sleeve (41) is threadedly connected to the outer wall of the outer tube body (1) near the upper end, the lower side of the threaded sleeve (41) is rotatably connected to a mechanism ring (42), the inner side of the mechanism ring (42) is fixedly connected to a piston rod (43) via a circular plate, the outer wall of the piston rod (43) is movably sleeved to the inner side of the liquid storage tube (2) near the upper side, the lower side of the piston rod (43) is fixedly connected to a medicine storage bag (44), and a receiving groove (45) is provided in the middle of the lower surface of the piston rod (43).

3. A prefilled flush syringe according to claim 2, characterized in that: A fixing ring (46) is fixedly sleeved on the outer wall of the outer tube body (1) near the upper end, and the lower side of the fixing ring (46) is fixedly connected to the upper surface of the threaded sleeve (41) via a thin column.

4. A prefilled flush syringe according to claim 2, characterized in that: The outer wall of the threaded sleeve (41) is provided with friction patterns.

5. A prefilled flush syringe according to claim 1, characterized in that: Top plates (55) are fixedly connected to the positions near the bottom end on the left and right sides of the outer wall of the outer tube body (1).

6. A prefilled flush syringe according to claim 1, characterized in that: The inner side of the clamping ring (51) is fixedly connected to a mounting plate (56) via a cylinder, and the mounting plate (56) is located between the inner side of the outer tube body (1) and the outer side of the liquid storage tube (2). The lower side of the mounting plate (56) is fixedly connected to an injection needle (58), and the lower side of the liquid storage tube (2) is fixedly connected to a hose (57) between a position close to the left side and the middle of the upper side of the mounting plate (56).

Images