A sterile syringe with needle

Abstract

This utility model relates to the field of medical device technology and discloses a sterile syringe with a needle, including a syringe mechanism and a piston mechanism. The syringe mechanism includes an injection syringe, with wristbands symmetrically fixed on both sides of one end. The piston mechanism includes a needle rod; a push piston and a push head are respectively fixed at both ends of the needle rod. Internally threaded sleeves are rotatably embedded at the ends of the push head away from the push piston. Externally threaded rods are threaded inside both internally threaded sleeves, and a spring-loaded telescopic rod is fixedly installed at one end of each externally threaded rod. This utility model significantly improves the convenience and safety of injection operations by introducing the spring-loaded telescopic rod and the externally threaded rod.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a sterile syringe with a needle. Background Technology

[0002] Sterile syringes with needles refer to syringe products that have undergone strict sterilization to meet sterility standards and are equipped with an injection needle. They mainly consist of two parts: a syringe and an injection needle. The syringe typically includes components such as an outer casing, plunger, and piston, used to draw and contain liquid medications; the injection needle is used to puncture the skin and blood vessels to inject the medication into the body. These products are widely used in the medical field, such as for drug injections and blood draws. During the manufacturing process, appropriate sterilization methods, such as ethylene oxide sterilization, are used to ensure their sterility, and sealed packaging is used to maintain their sterility until the time of use. Using sterile syringes with needles effectively avoids medical risks such as infection caused by instrument contamination, ensuring the safety and effectiveness of medical procedures.

[0003] In the medical field, a crucial issue that cannot be ignored when using injection needles for drug administration is the significant impact of different drug properties on the injection procedure. Drug viscosity is one of the most important factors affecting injection speed. Different drugs, due to differences in composition, dosage form, and other factors, exhibit vastly different physical properties, with viscosity being a critical physical indicator. Taking high-viscosity drugs as an example, such as certain oily injectable solutions, these drugs have high intermolecular friction, and their internal structure results in significant intermolecular restraint, leading to extremely high flow resistance. When these high-viscosity drugs need to pass through the syringe needle, the difficulty of flow increases dramatically, much like navigating a narrow and obstructed channel. To propel the drug forward smoothly, medical personnel need to apply greater pressure to the syringe plunger. This additional pressure significantly slows down the injection speed. Compared to the smooth and rapid injection of ordinary low-viscosity drugs, the injection of high-viscosity drugs is like a slowly flowing syrup, requiring more time and force to complete. Furthermore, some drugs possess unique pharmacological properties; their effects are rapid and potent, quickly triggering physiological responses after entering the body. In such situations, rapid injection would introduce a large amount of medication into the body in a short period, potentially leading to serious adverse reactions such as drastic changes in blood pressure and abnormal fluctuations in heart rate, posing a potential threat to the patient's health. Furthermore, in real-world medical settings, healthcare professionals may need to perform multiple injections, and in many cases, manual syringe pushing is still the primary method. However, manual operation has limitations, making it difficult to precisely control the injection force. The force exerted during each injection may vary slightly depending on the healthcare professional's condition and hand fatigue, resulting in inconsistent injection speed. Simultaneously, repeated injections require constant forceful syringe pushing, a physically demanding task. Prolonged use of this method can easily lead to hand fatigue in healthcare professionals, further affecting the precision of injection force control and increasing medical risks.

[0004] Therefore, those skilled in the art have provided a sterile syringe with a needle to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a sterile syringe with a needle. Using this syringe is more labor-saving and convenient.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A sterile syringe with a needle includes a syringe mechanism and a piston mechanism. The syringe mechanism includes an injection syringe, and wristbands are symmetrically fixed on both sides of one end of the injection syringe. The piston mechanism includes a needle rod.

[0008] The needle bar is fixedly provided with a push piston and a push head at both ends. The two ends of the push head away from the push piston are rotatably embedded with internal threaded sleeves. Both internal threaded sleeves are threaded with external threaded rods. One end of the external threaded rod is fixedly provided with a spring telescopic rod.

[0009] Furthermore, an injection needle is movably fitted onto the end of the injection syringe furthest from the wristband.

[0010] Furthermore, the piston is movably sleeved inside the syringe, and one end of the spring telescopic rod is fixedly attached to the wristband.

[0011] Furthermore, a clamp is fixedly installed at the end of the external threaded rod away from the spring telescopic rod.

[0012] Furthermore, the outer surface of the externally threaded rod is provided with scale lines.

[0013] This utility model has the following beneficial effects:

[0014] This invention proposes a sterile syringe with a needle. This device can precisely adjust the tension of the spring telescopic rod according to the drug viscosity, ensuring the uniformity and stability of the injection speed. This avoids injection speed fluctuations caused by uneven manual operation. Medical personnel only need to use their thumb to block the pusher to advance and inject the drug, without additional force, effectively reducing hand fatigue. It is particularly suitable for long-term or repeated injection operations. The graduations on the external thread rod allow medical personnel to precisely adjust the tension of the spring telescopic rod, ensuring that the tension of the two spring telescopic rods is the same, further improving injection accuracy. Furthermore, the injection needle... The device is attached to the syringe for easy replacement and adjustment to adapt to different injection needs. Its one-handed operation design makes injection more convenient for medical staff, allowing them to inject the medication with one hand and press the injection area with the other, thus improving efficiency and safety. This invention can adapt to the injection needs of drugs with different viscosities. For high-viscosity drugs, the elasticity of the spring telescopic rod is increased to ensure smooth drug delivery, while for low-viscosity drugs, the elasticity is appropriately reduced to avoid excessive injection speed. The overall design is simple, easy to operate, and highly adaptable, significantly improving the safety and convenience of medical operations and showing broad application prospects. Attached Figure Description

[0015] Figure 1 This is a front view of the right side of this utility model;

[0016] Figure 2 This is a frontal left view of the present invention;

[0017] Figure 3 This is a schematic diagram of the syringe mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the piston mechanism of this utility model.

[0019] Legend:

[0020] 1. Syringe mechanism; 2. Piston mechanism; 101. Injection syringe; 102. Injection needle; 103. Wristband; 201. Needle bar; 202. Pusher head; 203. Clamp head; 204. External threaded rod; 205. Internal threaded sleeve; 206. Spring telescopic rod; 207. Push piston. Detailed Implementation

[0021] 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 protection scope of the present utility model.

[0022] Reference Figures 1-4 The present invention provides an embodiment of a sterile syringe with a needle, comprising a syringe mechanism 1 and a piston mechanism 2. The syringe mechanism 1 includes an injection syringe 101, and wristbands 103 are symmetrically fixed on both sides of one end of the injection syringe 101. The piston mechanism 2 includes a needle rod 201.

[0023] The needle bar 201 is fixedly provided with a push piston 207 and a push head 202 at both ends. The push head 202 is rotatably embedded with an internal threaded sleeve 205 on the side away from the push piston 207. Both internal threaded sleeves 205 are threaded with an external threaded rod 204 inside. One end of the external threaded rod 204 is fixedly provided with a spring telescopic rod 206.

[0024] An injection needle 102 is movably fitted onto the end of the syringe 101 furthest from the wristband 103. A piston 207 is movably fitted inside the syringe 101, and one end of a spring telescopic rod 206 is fixedly attached to the wristband 103. A locking head 203 is fixedly fitted onto the end of an externally threaded rod 204 furthest from the spring telescopic rod 206. The outer surface of the externally threaded rod 204 is provided with graduation lines.

[0025] Specifically, this utility model relates to a sterile syringe with a needle, aiming to solve problems in the prior art such as difficulty in injection operation, unstable injection speed, and operator fatigue caused by differences in drug viscosity. The advantages and structural features of this technology will be analyzed in detail below with reference to the accompanying drawings and technical solution.

[0026] This invention, through the introduction of a spring-loaded telescopic rod 206 and an externally threaded rod 204, makes the injection process more effortless. Medical personnel only need to use their thumb to block the pusher 202 to advance and inject the medication, without the need for additional force, effectively reducing hand fatigue. The elasticity of the spring-loaded telescopic rod 206 automatically pushes the pusher 202 closer to the syringe 101, ensuring the stability of the injection speed and avoiding fluctuations in injection speed caused by uneven manual operation.

[0027] The external threaded rod 204 is equipped with graduation lines, allowing medical personnel to precisely adjust the tension of the spring telescopic rod 206 according to the viscosity of the drug, ensuring that the tension of the two spring telescopic rods 206 is the same, thereby guaranteeing the uniformity and stability of the injection. By rotating the internal threaded sleeve 205 to adjust the lateral position of the external threaded rod 204, the degree of compression or extension of the spring telescopic rod 206 can be flexibly adjusted to meet the injection needs of drugs with different viscosities.

[0028] Working principle: Before use, the tension of the spring telescopic rod 206 is adjusted according to the characteristics of the drug. Specifically, the outer threaded rod 204 is adjusted by rotating the inner threaded sleeve 205, causing the outer threaded rod 204 to move laterally left and right, thereby compressing or stretching the spring telescopic rod 206. For example, when injecting liquids with high viscosity, the compression spring is shortened, increasing the elasticity of the spring telescopic rod 206. Then, the middle and index fingers are inserted into the two wristbands 103, and the thumb is placed inside the pusher head 202. After the thumb pushes the pusher head 202 outward to draw out the liquid, the spring telescopic rod 206 is stretched. During the injection process of the syringe 101, the elasticity of the spring telescopic rod 206 will pull the pusher head 202 closer to the syringe 101, thereby pushing the piston 207 forward. The thumb blocks the pusher head 202 to prevent it from being pushed too fast. The drug can be pushed and injected by elasticity without the need for the thumb to exert force, making it more labor-saving and more stable when injecting drugs.

[0029] During the above operation, drawing the liquid requires considerable force. However, drawing the drug is different from injecting the drug, and the patient's comfort does not need to be considered. Therefore, it can be operated with both hands. However, injecting the drug requires one hand to inject the drug while the other hand presses the injection area. Therefore, this device is more labor-saving and stable when injecting the drug into the patient. At the same time, the scale line on the external thread rod 204 can accurately control the tension of the two spring telescopic rods 206 to be the same.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sterile syringe with needle comprising a barrel mechanism (1) and a piston mechanism (2), characterized in that: The syringe mechanism (1) includes an injection syringe (101), and wristbands (103) are symmetrically fixed on both sides of one end of the injection syringe (101). The piston mechanism (2) includes a needle rod (201). The needle bar (201) is fixedly provided with a push piston (207) and a push head (202) at both ends respectively. The push head (202) is rotatably embedded with an internal thread sleeve (205) on the side away from the push piston (207). Both internal thread sleeves (205) are threaded with an external thread rod (204). One end of the external thread rod (204) is fixedly provided with a spring telescopic rod (206).

2. A sterile syringe with a needle according to claim 1, characterized in that: The syringe (101) has an injection needle (102) movably sleeved on the end away from the wristband (103).

3. A sterile syringe with a needle according to claim 1, characterized in that: The push piston (207) is movably sleeved inside the injection syringe (101), and one end of the spring telescopic rod (206) is fixedly set with the wristband (103).

4. A sterile syringe with a needle according to claim 1, characterized in that: A clamp (203) is fixedly installed at the end of the external threaded rod (204) away from the spring telescopic rod (206).

5. A sterile syringe with a needle according to claim 1, characterized in that: The outer surface of the external threaded rod (204) is provided with scale lines.

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