Pre-filled syringe

Abstract

The utility model discloses a pre-filled syringe, which belongs to the technical field of pre-filled syringes and comprises a syringe, a push assisting rod is movably arranged in the syringe, a sealing plug is fixedly connected to the lower end of the push assisting rod in the syringe, and a cavity formed by the sealing plug and the syringe is used for storing liquid medicine. Through the arrangement of the U-shaped frame, the inserting rod and the two rotating blocks, the inserting rod is inserted into the inserting hole, then the two rotating blocks are rotated by 90 degrees and located in the groove, and therefore fixing of the boosting rod is completed, and in the packaging or transporting process of an injector, the boosting rod is not prone to falling off during packaging or transporting of the injector. Therefore, liquid medicine seepage caused by movement of the boosting rod can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of pre-filled syringes, and particularly relates to a pre-filled syringe. Background Art

[0002] Pre-filled syringes are mainly used for the packaging and storage of drugs and are directly used for injection or for surgical irrigation in ophthalmology, otology, orthopedics, etc. Pre-filled syringes have both the functions of storing drugs and injection, and use materials with good compatibility and stability. They are not only safe and reliable, but also minimize the labor and costs consumed from production to use compared with the traditional "medicine bottle + syringe" method, bringing many advantages to pharmaceutical enterprises and clinical use. The pre-filled syringe with Chinese publication number: CN217854071U includes a syringe barrel, a protective cap, a locking cap, and a rubber stopper; the protective cap is connected to the injection end of the syringe barrel; the locking cap is detachably connected to the protective cap; the rubber stopper is connected to the locking cap and seals the injection end. The pre-filled syringe has a simple structure, is easy to use, and has good sealing performance, and can effectively prevent the problem of liquid leakage.

[0003] The problems existing in the prior art are as follows: Although the above-mentioned pre-filled syringe has a function of sealing it, since the push rod is not fixedly installed, the liquid medicine is likely to ooze out due to the movement of the push rod during packaging and transportation, which not only affects the quality of the liquid medicine, but also reduces the use safety. Summary of the Utility Model

[0004] Aiming at the problems existing in the prior art, the utility model provides a pre-filled syringe, which has the advantage of preventing the liquid medicine from oozing out, and solves the problems that although the existing pre-filled syringe has a function of sealing it, since the push rod is not fixedly installed, the liquid medicine is likely to ooze out due to the movement of the push rod during packaging and transportation, which not only affects the quality of the liquid medicine, but also reduces the use safety.

[0005] The utility model is realized as follows: A pre-filled syringe includes a syringe barrel, a push rod is movably arranged in the syringe barrel, a sealing plug is fixedly connected to the lower end of the push rod located in the syringe barrel, a cavity formed by the sealing plug and the syringe barrel is used for storing the liquid medicine, and a fixing component and a sealing component are respectively fixedly installed at the upper and lower ends of the syringe barrel.

[0006] Preferably, scale lines are arranged on the push rod, and a jack is opened at the upper end of the push rod.

[0007] Preferably, a holding part is fixedly sleeved on the outer surface of the upper end of the syringe barrel, and arc-shaped surfaces are arranged at both ends of the lower surface of the holding part, and the two arc-shaped surfaces respectively limit the index finger and the middle finger.

[0008] Preferably, the fixing assembly includes a U-shaped frame fixedly installed on the upper surface of the handheld part. Through holes are provided on both sides of the U-shaped frame, and the through holes correspond to the jacks.

[0009] Preferably, grooves are provided on the outer walls of both sides of the U-shaped frame. A plug rod is arranged between the two through holes. The middle part of the plug rod is located in the jack. Fixed shafts are fixedly connected to both ends of the plug rod. Rotating blocks are rotatably sleeved on each fixed shaft, and the rotating blocks are adapted to the grooves.

[0010] Preferably, the sealing assembly includes a fixed collar fixedly sleeved on the lower end of the syringe barrel. A concave sealing ring is fixedly connected to the inner wall of the upper end of the fixed collar, and an internal thread is provided on the inner wall of the lower end of the fixed collar.

[0011] Preferably, a sealing cover is arranged below the fixed collar. An anti-slip part is provided on the outer surface of the sealing cover. An external thread is provided on the outer wall of the upper end of the sealing cover, and the sealing cover is threadedly connected to the fixed collar.

[0012] Preferably, a conical sealing ring is fixedly connected to the upper surface of the sealing cover. The conical sealing ring is adapted to the concave sealing ring. A sealing column is fixedly connected to the middle of the sealing cover, and the sealing column is adapted to the medicine outlet hole at the lower end of the syringe barrel.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. Through the arrangement of the U-shaped frame, the plug rod and the two rotating blocks, the plug rod is inserted into the jack, and then the two rotating blocks are rotated 90 degrees and located in the grooves, so as to complete the fixation of the push rod. In this way, during the packaging or transportation of the syringe, the leakage of the liquid medicine caused by the movement of the push rod can be avoided.

[0015] 2. With the help of the scale lines provided on the push rod, medical staff can clearly understand the dosage of the liquid medicine in the syringe barrel through the scale lines, which is convenient for the operation of medical staff. Secondly, the setting of the handheld part facilitates medical staff to place the index finger and middle finger against its lower surface when using the syringe, solves the problem that the existing handheld part design is too small and not conducive to use, and at the same time prevents the phenomenon of slipping during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is an exploded view of the overall structure of the present utility model;

[0018] Figure 3 This is a sectional view of the partial structure of the present utility model;

[0019] Figure 4 This is the Figure 3 enlarged view of the structure at position A in the present utility model;

[0020] Figure 5 This is the Figure 3 enlarged view of the structure at position B in the present utility model.

[0021] In the figure: 1, syringe barrel; 2, push rod; 201, scale line; 202, jack; 3, sealing plug; 4, holding part; 5, fixing assembly; 501, U-shaped frame; 5011, through hole; 5012, groove; 502, inserting rod; 503, fixed shaft; 504, rotating block; 6, sealing assembly; 601, fixed collar; 6011, internal thread; 602, concave sealing ring; 603, sealing cover; 6031, external thread; 6032, anti-slip part; 604, conical sealing ring; 605, sealing column. Detailed implementation manners

[0022] In order to further understand the content, features and effects of the present utility model, the following embodiments are cited and described in detail with reference to the accompanying drawings as follows.

[0023] The structure of the present utility model will be described in detail below with reference to the accompanying drawings.

[0024] As Figures 1 to 5 shown, a prefilled syringe provided by an embodiment of the present utility model includes a syringe barrel 1, a push rod 2 is movably arranged in the syringe barrel 1, a sealing plug 3 is fixedly connected to the lower end of the push rod 2 located in the syringe barrel 1, the cavity formed by the sealing plug 3 and the syringe barrel 1 is used for storing liquid medicine, and a fixing assembly 5 and a sealing assembly 6 are respectively fixedly installed at the upper and lower ends of the syringe barrel 1.

[0025] Further, a scale line 201 is arranged on the push rod 2, and a jack 202 is opened at the upper end of the push rod 2.

[0026] In this application, by virtue of the arrangement of the scale line 201 arranged on the push rod 2, medical staff can clearly know the dosage of the liquid medicine in the syringe barrel 1 through the scale line 201, thus facilitating the operation of medical staff.

[0027] Further, a holding part 4 is fixedly sleeved on the outer surface of the upper end of the syringe barrel 1, and arc-shaped surfaces are arranged at both ends of the lower surface of the holding part 4, and the two arc-shaped surfaces respectively limit the index finger and the middle finger.

[0028] In this application, the provision of the handheld part 4 facilitates medical staff to place their index finger and middle finger against its lower surface when using the syringe, solves the problem that the existing design of the handheld part 4 is too small and not conducive to use, and at the same time prevents the phenomenon of slipping during use.

[0029] Further, the fixing component 5 includes a U-shaped frame 501 which is fixedly installed on the upper surface of the handheld part 4. Through holes 5011 are provided on both sides of the U-shaped frame 501, and the through holes 5011 correspond to the insertion holes 202. Grooves 5012 are provided on the outer walls of both sides of the U-shaped frame 501. An insertion rod 502 is arranged between the two through holes 5011. The middle part of the insertion rod 502 is located in the insertion hole 202. Fixed shafts 503 are fixedly connected to both ends of the insertion rod 502. Rotating blocks 504 are rotatably sleeved on each fixed shaft 503, and the rotating blocks 504 are adapted to the grooves 5012.

[0030] In this application, when fixing the push rod 2, first rotate the two rotating blocks 504 to be horizontal with the insertion rod 502, then insert the entire insertion rod 502 into the insertion hole 202 so that both ends thereof are located at the two through holes 5011, and finally rotate the two rotating blocks 504 by 90 degrees so that they respectively fall into each groove 5012 to complete the fixing of the push rod 2.

[0031] Further, the sealing component 6 includes a fixed collar 601 which is fixedly sleeved on the lower end of the syringe barrel 1. A concave sealing ring 602 is fixedly connected to the inner wall of the upper end of the fixed collar 601. An internal thread 6011 is provided on the inner wall of the lower end of the fixed collar 601. A sealing cover 603 is arranged below the fixed collar 601. An anti-slip portion 6032 is provided on the outer surface of the sealing cover 603. An external thread 6031 is provided on the outer wall of the upper end of the sealing cover 603. The sealing cover 603 is threadedly connected to the fixed collar 601. A conical sealing ring 604 is fixedly connected to the upper surface of the sealing cover 603, and the conical sealing ring 604 is adapted to the concave sealing ring 602. A sealing column 605 is fixedly connected to the middle of the sealing cover 603, and the sealing column 605 is adapted to the medicine outlet hole at the lower end of the syringe barrel 1.

[0032] In this application, screw the sealing cover 603 into the fixed collar 601. As the sealing cover 603 continuously enters, at this time the conical sealing ring 604 will slowly insert into the concave sealing ring 602 and is in interference fit with the concave sealing ring 602. With the cooperation of the concave sealing ring 602 and the conical sealing ring 604, it plays a role in protecting the lower end of the syringe barrel 1. At the same time, the sealing column 605 also moves towards the medicine outlet hole. When the sealing cover 603 completely enters the fixed collar 601, the sealing column 605 just inserts into the medicine outlet hole to complete the sealing of the syringe.

[0033] The working principle of the present utility model:

[0034] In use, first, screw the sealing cap 603 into the fixed collar 601 through threads. As the sealing cap 603 continuously enters, at this time, the conical sealing ring 604 will slowly insert into the concave sealing ring 602 and is in interference fit with the concave sealing ring 602. With the cooperation of the concave sealing ring 602 and the conical sealing ring 604, it plays a role in protecting the lower end of the syringe barrel 1. At the same time, the sealing column 605 also moves towards the medicine outlet hole. When the sealing cap 603 completely enters the fixed collar 601, the sealing column 605 just inserts into the medicine outlet hole, thus sealing the syringe.

[0035] After the liquid medicine is filled into the syringe barrel 1, then rotate the two rotating blocks 504 to be horizontal with the inserting rod 502, and then insert the whole inserting rod 502 into the inserting hole 202 so that both ends are located at the two through holes 5011. Finally, rotate the two rotating blocks 504 by 90 degrees so that they respectively fall into each groove 5012 to complete the fixation of the push rod 2.

[0036] In summary: For this prefilled syringe, with the help of the scale line 201 provided on the push rod 2, medical staff can clearly understand the dose of the liquid medicine in the syringe barrel 1 through the scale line 201, which is convenient for medical staff to operate; secondly, the setting of the handheld part 4 facilitates medical staff to place the index finger and middle finger against its lower surface when using the syringe, solves the problem that the existing handheld part 4 is designed too small and is not conducive to use, and at the same time prevents the phenomenon of slipping during use; through the setting of the U-shaped frame 501, the inserting rod 502 and the two rotating blocks 504, the inserting rod 502 is inserted into the inserting hole 202, and then the two rotating blocks 504 are rotated by 90 degrees and located in the grooves 5012, thus completing the fixation of the push rod 2. In this way, during the packaging or transportation of the syringe, the situation of liquid medicine leakage caused by the movement of the push rod 2 can be avoided.

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A prefilled syringe, comprising a syringe barrel (1), characterized in that: A push rod (2) is movably arranged in the syringe barrel (1). A sealing plug (3) is fixedly connected to the lower end of the push rod (2) located in the syringe barrel (1). The cavity formed by the sealing plug (3) and the syringe barrel (1) is used for storing liquid medicine. Fixing components (5) and sealing components (6) are respectively fixedly installed at the upper and lower ends of the syringe barrel (1).

2. The prefilled syringe according to claim 1, wherein: Scale lines (201) are arranged on the push rod (2), and a jack (202) is opened at the upper end of the push rod (2).

3. The prefilled syringe according to claim 2, wherein: A handheld part (4) is fixedly sleeved on the outer surface of the upper end of the syringe barrel (1). Arc-shaped surfaces are arranged at both ends of the lower surface of the handheld part (4), and the two arc-shaped surfaces respectively limit the index finger and the middle finger.

4. The prefilled syringe according to claim 3, wherein: The fixing component (5) includes a U-shaped frame (501). The U-shaped frame (501) is fixedly installed on the upper surface of the handheld part (4). Through holes (5011) are opened on both sides of the U-shaped frame (501), and the through holes (5011) correspond to the jack (202).

5. The prefilled syringe according to claim 4, wherein: Grooves (5012) are opened on the outer walls of both sides of the U-shaped frame (501). A plug rod (502) is arranged between the two through holes (5011). The middle part of the plug rod (502) is located in the jack (202). Fixed shafts (503) are fixedly connected to both ends of the plug rod (502). Rotating blocks (504) are rotatably sleeved on each fixed shaft (503), and the rotating blocks (504) are adapted to the grooves (5012).

6. The prefilled syringe according to claim 1, wherein: The sealing component (6) includes a fixed collar (601). The fixed collar (601) is fixedly sleeved on the lower end of the syringe barrel (1). A concave sealing ring (602) is fixedly connected to the inner wall of the upper end of the fixed collar (601). Internal threads (6011) are opened on the inner wall of the lower end of the fixed collar (601).

7. The prefilled syringe according to claim 6, characterized in that: A sealing cover (603) is arranged below the fixed collar (601). An anti-slip part (6032) is arranged on the outer surface of the sealing cover (603). External threads (6031) are arranged on the outer wall of the upper end of the sealing cover (603). The sealing cover (603) is threadedly connected to the fixed collar (601).

8. The prefilled syringe according to claim 7, wherein: A conical sealing ring (604) is fixedly connected to the upper surface of the sealing cover (603). The conical sealing ring (604) is adapted to the concave sealing ring (602). A sealing column (605) is fixedly connected to the middle of the sealing cover (603). The sealing column (605) is adapted to the medicine outlet hole at the lower end of the syringe barrel (1).

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