Needle head capable of preventing needle stick injury

Abstract

The utility model provides a needle head capable of preventing needle stick injury, and relates to the field of medical instruments. A needle core is movably arranged in a needle sleeve in a penetrating mode. A first spring, an elastic pressing structure and a U-shaped stop block are arranged in the needle sleeve, and the first spring is closer to one end of the needle point of the needle core than the stop block; the needle core is sleeved with the first spring, the end, away from the stop block, of the first spring abuts against the interior of the needle sleeve, and the other end of the first spring is fixedly connected to the outer wall of the needle core and abuts against one side of the stop block; the U-shaped opening of the stopping block is in a gradually-narrowed shape which is gradually narrowed towards the closed end of the stopping block, and the diameter of the first spring is larger than the minimum width of the U-shaped opening and smaller than the maximum width of the U-shaped opening. The elastic pressing structure is connected with the stop block and used for pressing the stop block in the direction perpendicular to the axis of the needle core, and a pressing block connected with the elastic pressing structure is arranged on the side wall of the needle sleeve in a penetrating mode. According to the needle, the needle core can be retracted into the needle sleeve when the needle is withdrawn, needle pricking is avoided, and the use safety of the needle is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and more specifically, to a needle that prevents needlestick injuries. Background Technology

[0002] Needlestick injuries refer to deep skin injuries caused by accidental needle pricks from various injection needles, puncture needles, suture needles, etc., which are sufficient to cause bleeding in the injured person. It is one of the most common occupational injuries in nursing work.

[0003] Currently, the main preventative measures against needlestick injuries on the market are various types of indwelling needles designed to prevent needlestick injuries. The proper use of sharps containers and the strict prohibition against reattaching needles in hospitals also play a role. However, the most fundamental measure for preventing needlestick injuries is to isolate the needle, contaminated with the patient's blood, from the patient's body as quickly as possible. Sharps containers, rubber caps, and other preventative needlestick injury devices cannot achieve this clinical effect. While retractable needles with safety devices can achieve this effect, their limited application means they cannot be used for procedures other than intravenous infusions. Utility Model Content

[0004] The purpose of this invention is to provide a needle tip that prevents needle pricks, which can retract the needle core into the needle sheath before removing the needle to avoid needle pricks and greatly improve the safety of needle use.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A needle designed to prevent needlestick injuries, comprising:

[0007] The needle core is movably inserted into the needle sheath;

[0008] The needle sheath includes a first spring, an elastic pressing structure, and a U-shaped blocking block. The first spring is located between the blocking block and the needle tip of the needle core. The first spring is sleeved on the outside of the needle core, with one end of the first spring away from the blocking block abutting against the inside of the needle sheath. The other end of the first spring is fixedly connected to the outer wall of the needle core and abuts against one side of the blocking block. The U-shaped opening of the blocking block gradually narrows towards its closed end. The diameter of the first spring is greater than the minimum width of the U-shaped opening and less than the maximum width of the U-shaped opening. The elastic pressing structure is connected to the blocking block and is used to press the blocking block in a direction perpendicular to the axis of the needle core. A pressing block connected to the elastic pressing structure passes through the side wall of the needle sheath.

[0009] Furthermore, in this utility model, the elastic pressing structure includes a base plate and a pressure plate. The base plate is connected to the inner wall of the needle sleeve through an elastic component, and the closed end of the blocking block abuts against the base plate. The pressure plate is connected to one end of the U-shaped opening of the blocking block, and the pressing block is located on the side of the needle sleeve close to the pressure plate. The pressure plate is connected to the pressing block.

[0010] Furthermore, in this utility model, there are two pressure plates, which are respectively located on both sides of the end of the U-shaped opening; there are two pressing blocks, which are respectively connected to the two pressure plates.

[0011] Furthermore, in this utility model, the side wall of the needle sheath has two strip-shaped holes, each strip-shaped hole including a narrow portion in the middle and wide portions at both ends, the width of the narrow portion being less than the width of the wide portion; two pressing blocks are respectively inserted through the two strip-shaped holes, and limiting blocks are provided on opposite sides of the pressing blocks, the width of the pressing blocks being adapted to the width of the narrow portion, and the total width of the pressing blocks and the two limiting blocks being greater than the width of the narrow portion and less than the width of the wide portion.

[0012] Furthermore, in this invention, when the pressing block is located near the wide portion of the needle tip, the first spring is in a compressed state.

[0013] Furthermore, in this invention, the length of the narrow portion is greater than 0.5 cm.

[0014] Furthermore, in this invention, the end of the base plate near the blocking block extends toward the tip of the needle and corresponds to one side of the first spring.

[0015] Furthermore, in this invention, the elastic component is composed of a plurality of second springs arranged in a row.

[0016] Furthermore, in this invention, one end of the needle sleeve is provided with a strip-shaped groove for the needle core to pass through, and the length of the strip-shaped groove is greater than the length of the needle core.

[0017] Furthermore, in this utility model, the needle sleeve is further provided with a sliding cavity and an elastic cavity surrounding and communicating with the strip groove. The elastic cavity is located at one end of the sliding cavity near the needle tip and communicates with the sliding cavity. The blocking block and the elastic pressing structure are located in the sliding cavity, and the spring is disposed in the elastic cavity. The diameter of the elastic cavity is larger than the diameter of the strip groove and smaller than the diameter of the sliding cavity.

[0018] This utility model has at least the following advantages or beneficial effects:

[0019] This invention features a first spring fitted inside the needle sheath, with one end abutting against the inside of the needle sheath and the other end fixedly connected to the outer wall of the needle core. This allows the needle core to move axially as the first spring extends and retracts. An elastic pressing structure, a U-shaped blocking block, and a pressing block are incorporated. Pressing the pressing block outside the needle sheath drives the elastic pressing structure to vertically press the blocking block, causing it to move vertically downwards. The U-shaped opening is tapered, allowing the blocking block to abut and limit the spring when not moving downwards, and allowing the spring to pass through when it moves downwards, thus causing the needle core to retract and providing protection. This invention retracts the needle core into the needle sheath before needle removal, preventing needlestick injuries and significantly improving needle safety. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A cross-sectional view of a needle tip for preventing needlestick injuries provided in an embodiment of this application;

[0022] Figure 2 A top view of the needle tip for preventing needlestick injuries provided in an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the structure of the blocking block provided in an embodiment of this application.

[0024] Icons: 1-Needle core, 2-Needle sleeve, 21-Strip groove, 22-Sliding cavity, 23-Elastic cavity, 3-First spring, 4-Blocking block, 51-Pressing block, 52-Base plate, 53-Pressure plate, 54-Limiting block, 55-Second spring, 56-Connecting rod, 6-Strip hole, 61-Wide part, 62-Narrow part. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] Example

[0028] Please refer to Figures 1-3 The figure shown is a schematic diagram of the needle tip for preventing needlestick injuries in an embodiment of this utility model;

[0029] This embodiment provides a needle tip that prevents needlestick injuries, including:

[0030] Needle core 1 is movably inserted into needle sleeve 2;

[0031] The needle sleeve 2 contains a first spring 3, an elastic pressing structure, and a U-shaped blocking block 4. The first spring 3 is closer to the needle tip end of the needle core 1 than the blocking block 4. The first spring 3 is sleeved on the outside of the needle core 1, with the end of the first spring 3 away from the blocking block 4 abutting against the inside of the needle sleeve 2. The other end of the first spring 3 is fixedly connected to the outer wall of the needle core 1 and abuts against one side of the blocking block 4. The U-shaped opening of the blocking block 4 is tapered towards its closed end. The diameter of the first spring 3 is greater than the minimum width of the U-shaped opening and less than the maximum width of the U-shaped opening. The elastic pressing structure is connected to the blocking block 4 and is used to press the blocking block 4 in a direction perpendicular to the axis of the needle core 1. A pressing block 51 connected to the elastic pressing structure passes through the side wall of the needle sleeve 2.

[0032] The needle for preventing needlestick injuries in this exemplary embodiment will now be further described.

[0033] In some embodiments of this application, reference is made to Figure 1 The needle sleeve 2 has a strip groove 21 at one end for the needle core 1 to pass through. The length of the strip groove 21 is greater than the length of the needle core 1. The needle core 1 is moved through the strip groove 21 so that the needle core 1 can be completely moved into the needle sleeve 2 and hidden. The needle sleeve 2 surrounds the needle core 1 and can enter the blood vessel or soft tissue together with the needle core 1.

[0034] In some embodiments of this application, the needle sleeve 2 is provided with a first spring 3, an elastic pressing structure, and a U-shaped blocking block 4. The first spring 3 is located between the blocking block 4 and the needle tip of the needle core 1. The first spring 3 is sleeved on the outside of the needle core 1, with one end of the first spring 3 away from the blocking block 4 abutting against the inside of the needle sleeve 2, and the other end of the first spring 3 fixedly connected to the outer wall of the needle core 1 and abutting against one side of the blocking block 4, so that the needle core 1 can move with the extension and retraction of the first spring 3. The U-shaped opening of the blocking block 4 is tapered towards its closed end. The diameter of the first spring 3 is greater than the minimum width of the U-shaped opening and less than the maximum width of the U-shaped opening, so that the first spring 3 can abut against the blocking block 4 and also pass through the blocking block 4. (Refer to...) Figure 3 The aforementioned elastic pressing structure is connected to the blocking block 4 and is used to press the blocking block 4 in a direction perpendicular to the axis of the needle core 1. A pressing block 51 connected to the elastic pressing structure is provided through the side wall of the needle sleeve 2. The operator presses the pressing block 51 from the outside of the needle sleeve 2, driving the elastic pressing structure to press down and causing the blocking block 4 to move down. This allows the first spring 3 to move from the bottom of the blocking block 4 to the top of the blocking block 4. During this process, the first spring 3 gradually moves from the minimum width of the U-shaped opening to the maximum width, so that the first spring 3 can pass through the U-shaped opening, thereby driving the needle core 1 to move into the needle sleeve 2 and retract it.

[0035] In one specific embodiment, during clinical application, the needle core 1 and needle sheath 2 of the needle tip are inserted into a blood vessel or tissue. When the treatment is finished, the pressing block 51 on the needle body is pressed, the needle core 1 retracts, and then the needle is pulled out. The needle tip after being pulled out will not cause puncture injury to the patient or medical staff, and there is no risk of puncture injury.

[0036] In a preferred embodiment, the needle sleeve 2 is further provided with a sliding cavity 22 and an elastic cavity 23 that surround and communicate with the strip groove 21. The elastic cavity 23 is located at the end of the sliding cavity 22 near the needle tip and communicates with the sliding cavity 22. The blocking block 4 and the elastic pressing structure are located in the sliding cavity 22, and the spring is located in the elastic cavity 23. The diameter of the elastic cavity 23 is larger than the diameter of the strip groove 21 and smaller than the diameter of the sliding cavity 22. That is, the sliding cavity 22 and the elastic cavity 23 form a stepped chamber. By designing chambers with different inner diameters, the needle core 1, the spring and the elastic pressing structure can be limited, which can prevent the needle core 1 from shifting or shaking when it moves forward or retracts.

[0037] In a preferred embodiment, the above-mentioned elastic pressing structure includes a base plate 52 and a pressure plate 53. The base plate 52 is connected to the inner wall of the needle sleeve 2 through an elastic component. The closed end of the blocking block 4 abuts against the base plate 52, that is, when the blocking block 4 moves down, it can squeeze the base plate 52 and the elastic component. The pressure plate 53 is connected to one end of the U-shaped opening of the blocking block 4. The pressing block 51 is located on the side of the needle sleeve 2 near the pressure plate 53. The pressure plate 53 is connected to the pressing block 51. The elastic component can support the blocking block 4, the pressure plate 53, and the pressing block 51.

[0038] In a preferred embodiment, two pressure plates 53 are provided, each located on one side of the end of the U-shaped opening; two pressing blocks 51 are provided, each connected to one of the two pressure plates 53. By providing two pressure plates 53, which are fixedly connected to both sides of the opening of the blocking block 4, the pressure plates 53 do not obstruct the passage of the first spring 3. The two pressing blocks 51 are used to control the two pressure plates 53; during operation, both pressing blocks 51 are pressed simultaneously.

[0039] As a preferred implementation method, refer to Figure 2 The needle sheath 2 has two strip-shaped holes 6 on its side wall. Each strip-shaped hole 6 includes a narrow portion 62 in the middle and a wide portion 61 at both ends. The width of the narrow portion 62 is smaller than the width of the wide portion 61, forming a strip-shaped hole 6 that is narrower in the middle and wider at both ends. Two pressing blocks 51 are respectively inserted through the two strip-shaped holes 6. Limiting blocks 54 are provided on opposite sides of the pressing blocks 51. The width of the pressing blocks 51 is adapted to the width of the narrow portion 62. The total width of the pressing blocks 51 and the two limiting blocks 54 is greater than the width of the narrow portion 62 but less than the width of the wide portion 61. Through the above structural design, the pressing blocks 51 can move along the strip-shaped holes 6, thereby driving the blocking blocks 4 to move axially through the pressure plate 53, realizing the retraction and limiting of the needle core 1 and its insertion.

[0040] In a preferred embodiment, when the pressing block 51 is located near the wide portion 61 of the needle tip, the first spring 3 is in a compressed state, at which time the needle tip is exposed outside the needle sleeve 2.

[0041] In one specific embodiment, when the needle is not in use, the pressing block 51 is located in the narrow portion 62 of the strip hole 6. At this time, the limiting blocks 54 on both sides are blocked by the narrow portion 62 and are located inside the needle sleeve 2. The pressing block 51 is in a pressed state, and the base plate 52 and the elastic component are also in a pressed state. Under the action of elastic tension, the blocking block 4 is in a pressed state. At this time, the first spring 3 passes through the U-shaped opening of the blocking block 4, driving the needle core 1 to retract into the needle sleeve 2. That is, when not in use or unopened, the needle core 1 is located inside the needle sleeve 2, which has a high degree of safety. When needed, press down on the pressing block 51 to move it to the wider portion 61 away from the needle tip. Once it reaches the wider portion 61, the limiting block 54 is released, and the pressing block 51 moves upward, causing the blocking block 4 to move upward as well. The limiting block 54 slides out and is located outside the needle sheath 2. At this point, the pressing block 51 can be moved towards the other wider portion 61. During this movement, the first spring 3 is compressed, causing the needle core 1 to pass through the needle sheath 2. Once it reaches the wider portion 61, the needle core 1 is fully protruding from the needle sheath 2, ready for puncture. After use, press down on the pressing block 51 to move the blocking block 4 downward, allowing the first spring 3 to pass through the blocking block 4, and the needle core 1 to retract. Move the pressing block 51 to the narrower portion 62, ensuring the needle core 1 remains in a retracted state, allowing the used needle to be discarded. This design ensures that the needle tip only protrudes from the needle sheath 2 during use; otherwise, it remains in a retracted state, providing high safety.

[0042] As a preferred implementation, the two pressing blocks 51 are connected by a connecting rod 56, which facilitates the synchronous pushing of the two pressing blocks 51 and improves efficiency.

[0043] In a preferred embodiment, the length of the narrow portion 62 is greater than 0.5 cm. Since the length of the needle tip is generally 0.5 cm, the length of the narrow portion 62 is set to be greater than 0.5 cm so that the needle tip can be completely retracted into the needle sheath 2.

[0044] As a preferred embodiment, the end of the base plate 52 near the blocking block 4 extends toward the needle tip and corresponds to one side of the first spring 3, so that the blocking block 4 is located in the middle of the base plate 52 when it is pressed down, thus avoiding imbalance of the base plate 52 when it is located at the end.

[0045] In a preferred embodiment, the elastic component is composed of a plurality of second springs 55 arranged in order to improve the stability of the base plate 52.

[0046] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A needle tip designed to prevent needlestick injuries, characterized in that, include: The needle core is movably inserted into the needle sheath; The needle sheath includes a first spring, an elastic pressing structure, and a U-shaped blocking block. The first spring is located between the blocking block and the needle tip of the needle core. The first spring is sleeved on the outside of the needle core, with one end of the first spring away from the blocking block abutting against the inside of the needle sheath. The other end of the first spring is fixedly connected to the outer wall of the needle core and abuts against one side of the blocking block. The U-shaped opening of the blocking block gradually narrows towards its closed end. The diameter of the first spring is greater than the minimum width of the U-shaped opening and less than the maximum width of the U-shaped opening. The elastic pressing structure is connected to the blocking block and is used to press the blocking block in a direction perpendicular to the axis of the needle core. A pressing block connected to the elastic pressing structure passes through the side wall of the needle sheath.

2. The needle tip for preventing needlestick injuries according to claim 1, characterized in that, The elastic pressing structure includes a base plate and a pressure plate. The base plate is connected to the inner wall of the needle sleeve through an elastic component. The closed end of the blocking block abuts against the base plate. The pressure plate is connected to one end of the U-shaped opening of the blocking block. The pressing block is located on the side of the needle sleeve close to the pressure plate. The pressure plate is connected to the pressing block.

3. The needle tip for preventing needlestick injuries according to claim 2, characterized in that, Two pressure plates are provided, and the two pressure plates are respectively located on both sides of the end of the U-shaped opening; two pressing blocks are provided, and the two pressing blocks are respectively connected to the two pressure plates.

4. The needle tip for preventing needlestick injuries according to claim 3, characterized in that, The needle sleeve has two strip-shaped holes on its sidewall. Each strip-shaped hole includes a narrow portion in the middle and wide portions at both ends. The width of the narrow portion is smaller than the width of the wide portion. Two pressing blocks are respectively inserted through the two strip-shaped holes. Each pressing block has a limiting block on its opposite sides. The width of the pressing block is adapted to the width of the narrow portion. The total width of the pressing block and the two limiting blocks is greater than the width of the narrow portion and less than the width of the wide portion.

5. The needle tip for preventing needlestick injuries according to claim 4, characterized in that, When the pressing block is located in the wide portion near the tip of the needle, the first spring is in a compressed state.

6. The needle tip for preventing needlestick injuries according to claim 5, characterized in that, The length of the narrow section is greater than 0.5 cm.

7. The needle tip for preventing needlestick injuries according to claim 2 or 6, characterized in that, The end of the base plate near the blocking block extends toward the tip of the needle and corresponds to one side of the first spring.

8. The needle tip for preventing needlestick injuries according to claim 2, characterized in that, The elastic component consists of a plurality of second springs arranged in a row.

9. The needle tip for preventing needlestick injuries according to claim 1, characterized in that, One end of the needle sheath has a strip-shaped groove for the needle core to pass through, and the length of the strip-shaped groove is greater than the length of the needle core.

10. The needle tip for preventing needlestick injuries according to claim 9, characterized in that, The needle sleeve also has a sliding cavity and an elastic cavity that surround and communicate with the strip groove. The elastic cavity is located at the end of the sliding cavity near the needle tip and communicates with the sliding cavity. The blocking block and the elastic pressing structure are located in the sliding cavity, and the spring is located in the elastic cavity. The diameter of the elastic cavity is larger than the diameter of the strip groove and smaller than the diameter of the sliding cavity.

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