Improved disposable sterile syringe

Abstract

The utility model discloses an improved disposable sterile syringe which comprises a needle cylinder, a pushing rod is arranged in the needle cylinder, a front-back through movable hole is formed in the front side of the outer cylindrical surface of the needle cylinder, a limiting rod is movably connected in the movable hole in a penetrating mode, and a main pipe is fixedly installed at the left end of the needle cylinder. And a conveying pipe is fixedly mounted at the left end of the main pipe. According to the improved disposable sterile syringe, the limiting rod and the connecting cylinder are arranged, so that the pushing rod cannot be used for the second time; when liquid medicine needs to be injected, the soft needle head can be injected into the blood vessel of a patient under the assistance of the steel needle strip, when the soft needle head is located in the blood vessel of the patient, the steel needle strip is taken out from the soft needle head and the blood vessel under the pulling of the connecting block, then the liquid medicine is injected into the blood vessel, and after injection is completed, the soft needle head is taken out from the blood vessel. And the soft needle head cannot be used without the assistance of the steel needle strip, so that the phenomenon of secondary use of the soft needle head can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of syringes, and particularly relates to an improved disposable sterile syringe. Background Art

[0002] A syringe is a common medical device. It is mainly used to inject or draw liquid medicine. Syringes can also be used in medical equipment and containers, such as scientific instruments in some chromatographic methods for injecting through a rubber diaphragm. Injecting gas into a blood vessel will cause air embolism. The method to remove air from the syringe to avoid embolism is to invert the syringe, tap it gently, and then squeeze out a little liquid before injecting it into the bloodstream.

[0003] The prior art (publication number: CN219271604U) discloses an improved disposable sterile syringe, including: a syringe barrel; a needle head, which is arranged at the center of the left side of the syringe barrel; a piston, which is slidably connected to the left side inside the syringe barrel, and a push rod is fixedly connected to the center of the right side of the piston. The right end of the push rod penetrates through the syringe barrel and extends to the outside of the syringe barrel; a card slot, which is opened at the top of the inner wall of the syringe barrel and on the right side of the piston; a first through hole, which is opened at the position corresponding to the card slot on the top of the push rod; a second through hole, which is opened on the right side of the push rod; a limiting mechanism, which is arranged on the left side of the top of the push rod. The beneficial effect of the utility model is as follows: Pull the handle outward, which will drive the plastic rope, baffle, connecting rod, connecting plate and clamping block to move away from the card slot, and at the same time compress the sleeve spring, so that the clamping block disengages from the card slot. Then insert the needle head into the liquid medicine, and pull the push rod outward, which can drive the piston to move away from the needle head, so that the liquid medicine is drawn into the syringe barrel. When injecting, push the push rod toward the needle head, which can drive the piston to move toward the needle head to the limit position, so as to inject the liquid medicine into the patient's body. Then the user cuts off the plastic rope exposing the push rod, so as to remove the handle. Then, under the elastic force of the sleeve spring, drive the connecting plate, clamping block, connecting rod and baffle to move back to their original positions, so that the clamping block is inserted into the card slot, thereby limiting the piston. Through the above steps, the piston can be prevented from moving inside the syringe barrel, so that the syringe can be prevented from being used again, thus avoiding cross-infection.

[0004] The existing improved disposable sterile syringe has the following drawbacks. After the existing disposable sterile syringe is used up, if it is not artificially damaged, it can still be used repeatedly. When a used disposable syringe is used again, it is easy to cause the risk of infection, making it have certain limitations. Therefore, we propose a new type of improved disposable sterile syringe. Content of the Utility Model

[0005] The main purpose of the present utility model is to provide an improved disposable sterile syringe, which can effectively solve the problem that the syringe is not convenient to be made disposable.

[0006] To achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0007] An improved disposable sterile syringe includes a syringe barrel. A push rod is arranged inside the syringe barrel. A through hole is formed in the front side of the outer cylindrical surface of the syringe barrel for the through movement of the front and rear directions. A limiting rod is movably inserted and connected in the through hole. A main pipe is fixedly installed at the left end of the syringe barrel. A conveying pipe is fixedly installed at the left end of the main pipe. A connecting cylinder is fixedly installed at the end of the conveying pipe away from the main pipe.

[0008] Preferably, a push disk is fixedly connected to the left end of the push rod, and a limiting hole is formed in the front side of the outer cylindrical surface of the push rod.

[0009] Preferably, a limiting disk is fixedly sleeved on the rear part of the outer surface of the limiting rod, a spring is movably sleeved on the front part of the outer surface of the limiting rod, a connecting hole is formed in the right side of the outer cylindrical surface of the limiting rod, and a pin is movably inserted and connected in the connecting hole. After the liquid medicine in the syringe barrel is injected into the patient's body by the push rod, the pin is taken out from the connecting hole, and under the elastic assistance of the spring, the spring drives the limiting disk and the limiting rod to move backward, so that the limiting rod is inserted into the limiting hole, and the push rod can be limited. After the limiting rod is inserted into the limiting hole, the limiting rod is located inside the through hole, making the limiting rod not easy to take out, and under the limitation of the limiting rod, the push rod cannot be reused.

[0010] Preferably, the limiting rod is movably inserted and connected inside the through hole, the pin is located outside the syringe barrel, and the spring and the limiting disk are located inside the syringe barrel.

[0011] Preferably, a soft needle head is fixedly connected to the left end of the connecting cylinder, a rubber plug is fixedly connected to the right side inside the connecting cylinder, a connecting block is movably inserted and connected to the right side inside the connecting cylinder, and a steel needle strip is fixedly connected to the left end of the connecting block. When the liquid medicine needs to be injected, first, with the assistance of the steel needle strip, the soft needle head can be inserted into the patient's blood vessel. When the soft needle head is located in the patient's blood vessel, the steel needle strip is pulled out from the soft needle head and the blood vessel by the connecting block, and then the liquid medicine is injected into the blood vessel. After the injection is completed, the soft needle head is taken out from the blood vessel, and the soft needle head cannot be used without the assistance of the steel needle strip, thereby avoiding the phenomenon of secondary use of the soft needle head.

[0012] Preferably, the steel needle strip penetrates through the rubber plug and the soft needle head and extends to the outside of the soft needle head.

[0013] Compared with the prior art, the present utility model has the following beneficial effects:

[0014] 1. In the present utility model, by providing a limiting rod, the push rod cannot be reused. During use, after the push rod injects the liquid medicine in the syringe into the patient's body, the pin is removed from the connection hole, and with the elastic assistance of the spring, the spring drives the limiting disc and the limiting rod to move backward, so that the limiting rod penetrates into the limiting hole, which can limit the push rod. After the limiting rod penetrates into the limiting hole, the limiting rod is located inside the moving hole, making it difficult to remove the limiting rod. Under the limitation of the limiting rod, the push rod cannot be reused;

[0015] 2. In the present utility model, by providing a connecting cylinder, the soft needle cannot be reused. During use, when the liquid medicine needs to be injected, first, with the assistance of the steel needle strip, the soft needle can be inserted into the patient's blood vessel. When the soft needle is inside the patient's blood vessel, under the pulling of the connecting block, the steel needle strip is removed from the soft needle and the blood vessel, and then the liquid medicine is injected into the blood vessel. After the injection is completed, the soft needle is removed from the blood vessel. Without the assistance of the steel needle strip, the soft needle cannot be used, thus avoiding the phenomenon of the soft needle being reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of an improved disposable sterile syringe of the present utility model;

[0017] Figure 2 is a schematic diagram of the overall structure of the push rod of an improved disposable sterile syringe of the present utility model;

[0018] Figure 3 is a schematic diagram of the overall structure of the limiting rod of an improved disposable sterile syringe of the present utility model;

[0019] Figure 4 is a schematic diagram of the overall structure of the connecting cylinder of an improved disposable sterile syringe of the present utility model.

[0020] In the figure: 1, syringe barrel; 2, push rod; 3, limiting rod; 4, main pipe; 5, delivery pipe; 6, connecting cylinder; 7, moving hole; 21, limiting hole; 22, push disc; 31, limiting disc; 32, spring; 33, connection hole; 34, pin; 61, soft needle; 62, connecting block; 63, steel needle strip; 64, rubber stopper. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] As Figures 1-4 shown, an improved disposable sterile syringe includes a syringe barrel 1, a push rod 2 is arranged inside the syringe barrel 1, a through activity hole 7 is opened on the front side of the outer cylindrical surface of the syringe barrel 1, a limiting rod 3 is movably inserted and connected inside the activity hole 7, a main pipe 4 is fixedly installed at the left end of the syringe barrel 1, a conveying pipe 5 is fixedly installed at the left end of the main pipe 4, and a connecting cylinder 6 is fixedly installed at one end of the conveying pipe 5 away from the main pipe 4.

[0025] The left end of the push rod 2 is fixedly connected with a push disk 22, and a limiting hole 21 is opened on the front side of the outer cylindrical surface of the push rod 2; a limiting disk 31 is fixedly sleeved on the rear part of the outer surface of the limiting rod 3, a spring 32 is movably sleeved on the front part of the outer surface of the limiting rod 3, a connecting hole 33 is opened on the right side of the outer cylindrical surface of the limiting rod 3, and a pin 34 is movably inserted and connected inside the connecting hole 33; the limiting rod 3 is movably inserted and connected inside the activity hole 7, the pin 34 is located outside the syringe barrel 1, and the spring 32 and the limiting disk 31 are located inside the syringe barrel 1; by arranging the limiting rod 3, the push rod 2 cannot be reused. During use, after the push rod 2 injects the liquid medicine in the syringe barrel 1 into the patient's body, the pin 34 is taken out from the connecting hole 33, and under the elastic assistance of the spring 32, the spring 32 drives the limiting disk 31 and the limiting rod 3 to move backward, so that the limiting rod 3 is inserted into the limiting hole 21, and the push rod 2 can be limited. After the limiting rod 3 is inserted into the limiting hole 21, the limiting rod 3 is located inside the activity hole 7, making the limiting rod 3 not easy to take out, and under the limitation of the limiting rod 3, the push rod 2 cannot be reused.

[0026] A soft needle 61 is fixedly connected to the left end of the connecting cylinder 6. A rubber plug 64 is fixedly connected to the right side inside the connecting cylinder 6. A connecting block 62 is movably inserted and connected to the right side inside the connecting cylinder 6. A steel needle strip 63 is fixedly connected to the left end of the connecting block 62; the steel needle strip 63 penetrates through the rubber plug 64 and the soft needle 61 and extends outward from the soft needle 61; by providing the connecting cylinder 6, the soft needle 61 cannot be reused. When in use, when the liquid medicine needs to be injected, first, with the assistance of the steel needle strip 63, the soft needle 61 can be inserted into the patient's blood vessel. When the soft needle 61 is inside the patient's blood vessel, under the pulling of the connecting block 62, the steel needle strip 63 is taken out from the soft needle 61 and the blood vessel, and then the liquid medicine is injected into the blood vessel. After the injection is completed, the soft needle 61 is taken out from the blood vessel, and the soft needle 61 cannot be used without the assistance of the steel needle strip 63, thus avoiding the phenomenon of the soft needle 61 being reused.

[0027] It should be noted that the present utility model is an improved disposable sterile syringe. By providing the limiting rod 3, the push rod 2 cannot be reused. When in use, after the push rod 2 injects the liquid medicine in the syringe barrel 1 into the patient's body, the pin 34 is taken out from the connection hole 33, and with the elastic assistance of the spring 32, the spring 32 drives the limiting disc 31 and the limiting rod 3 to move backward, so that the limiting rod 3 penetrates through the limiting hole 21 to limit the push rod 2. After the limiting rod 3 penetrates through the limiting hole 21, the limiting rod 3 is inside the moving hole 7, making the limiting rod 3 not easy to take out, and under the limitation of the limiting rod 3, the push rod 2 cannot be reused; by providing the connecting cylinder 6, the soft needle 61 cannot be reused. When in use, when the liquid medicine needs to be injected, first, with the assistance of the steel needle strip 63, the soft needle 61 can be inserted into the patient's blood vessel. When the soft needle 61 is inside the patient's blood vessel, under the pulling of the connecting block 62, the steel needle strip 63 is taken out from the soft needle 61 and the blood vessel, and then the liquid medicine is injected into the blood vessel. After the injection is completed, the soft needle 61 is taken out from the blood vessel, and the soft needle 61 cannot be used without the assistance of the steel needle strip 63, thus avoiding the phenomenon of the soft needle 61 being reused.

[0028] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An improved disposable sterile syringe, comprising a syringe barrel (1), characterized in that: Inside the syringe barrel (1), there is a push rod (2) arranged. On the front side of the outer cylindrical surface of the syringe barrel (1), there is an activity hole (7) penetrating through from front to back. Inside the activity hole (7), a limit rod (3) is movably inserted and connected. On the left end of the syringe barrel (1), a main pipe (4) is fixedly installed. On the left end of the main pipe (4), a delivery pipe (5) is fixedly installed. At the end of the delivery pipe (5) far from the main pipe (4), a connection cylinder (6) is fixedly installed.

2. The improved disposable sterile syringe according to claim 1, characterized in that: On the left end of the push rod (2), a push disk (22) is fixedly connected. On the front side of the outer cylindrical surface of the push rod (2), a limit hole (21) is opened.

3. An improved disposable sterile syringe according to claim 2, characterized in that: On the rear part of the outer surface of the limit rod (3), a limit disk (31) is fixedly sleeved. On the front part of the outer surface of the limit rod (3), a spring (32) is movably sleeved. On the right side of the outer cylindrical surface of the limit rod (3), a connection hole (33) is opened. Inside the connection hole (33), a pin (34) is movably inserted and connected.

4. An improved disposable sterile syringe according to claim 3, characterized in that: The limit rod (3) is movably inserted and connected inside the activity hole (7). The pin (34) is located outside the syringe barrel (1), and the spring (32) and the limit disk (31) are located inside the syringe barrel (1).

5. An improved disposable sterile syringe according to claim 4, characterized in that: On the left end of the connection cylinder (6), a soft needle head (61) is fixedly connected. On the right side inside the connection cylinder (6), a rubber plug (64) is fixedly connected. Inside the connection cylinder (6) on the right side, a connection block (62) is movably inserted and connected. On the left end of the connection block (62), a steel needle strip (63) is fixedly connected.

6. An improved disposable sterile syringe according to claim 5, characterized in that: The steel needle strip (63) penetrates through the rubber plug (64) and the soft needle head (61) and extends to the outside of the soft needle head (61).

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