Disposable anti-needle-stick-injury and anti-pollution device

Abstract

The invention discloses a disposable anti-needle-stick-injury and anti-pollution device, and relates to the technical field of infusion apparatus safety devices, the disposable anti-needle-stick-injury and anti-pollution device comprises a barrel, and a liquid absorption cotton column is fixedly installed in the barrel; wherein the upper wall of the cylinder is provided with a needle hole allowing a needle body to be inserted therein and a first seam communicated with the needle hole, the first seam extends from the needle hole to the outer edge of the top wall of the cylinder and continues to extend downwards along the outer wall of the cylinder to form a second seam, and the lower end of the second seam is communicated with a rectangular hole formed in the outer wall of the cylinder. The needle hole in the upper wall of the cylinder provides an insertion channel for the needle head, and the first seam and the second seam form an L-shaped rail groove, so that the needle wing is guided into the second seam which is vertically formed under pressing and finally clamped in the rectangular hole, and limiting is formed; at the moment, the needle tip enters the liquid absorption cotton column, residual blood is absorbed instantly under the capillary action of fibers in the cotton column, liquid drops are prevented from overflowing, meanwhile, the needle head is limited by the rectangular hole and cannot retreat or slip, and one-step anti-needling and anti-pollution dual protection of'locking after insertion and liquid absorption after locking 'is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to infusion set safety device technology, in particular to a disposable anti-needle-stick and anti-pollution device. BACKGROUND

[0002] After the completion of clinical intravenous infusion operation, medical staff need to dispose the blood-remaining steel needle immediately. The current practice is to temporarily insert the needle into the empty infusion bottle or infusion tube. This practice not only exposes the residual blood directly to the environment, causing serious pollution of the bed unit, the ground and the medical waste collection link, but also makes the needle prone to needle stick injury due to slipping or collision, bringing high risk of exposure to blood-borne pathogens such as HBV, HCV and HIV to the operator. Although there is a disposable anti-needle-stick infusion set on the market, it only shields the needle through a complex telescopic or retractable mechanism, which significantly increases the cost and has no function of absorbing residual blood, and still cannot avoid the problem of blood splashing after needle removal and liquid leakage in the subsequent disposal link. Therefore, there is an urgent need for a simple device that has the dual functions of "immediate locking and anti-needle-stick" and "quick liquid absorption and anti-pollution", is low in cost, and can be used with existing ordinary infusion sets. SUMMARY

[0003] The purpose of the present application is to provide a disposable anti-needle-stick and anti-pollution device to solve the problem of needle stick injury caused by the blood-remaining steel needle slipping after needle removal, and the blood exposure pollution of the environment caused by temporarily inserting the infusion bottle or infusion tube, as well as the high cost and lack of anti-pollution function of the existing anti-needle-stick infusion set.

[0004] In order to achieve the above-mentioned purpose, the present application provides the following technical solution: a disposable anti-needle-stick and anti-pollution device, comprising:

[0005] a cylinder body having a liquid-absorbing cotton column fixed inside;

[0006] wherein the upper wall of the cylinder body is provided with a needle hole for inserting the needle body, and a first slit opening communicated with the needle hole, the first slit opening extending from the needle hole to the outer edge of the top wall of the cylinder body, and then continuing to extend downward along the outer wall of the cylinder body to form a second slit opening, and the lower end of the second slit opening is communicated with a rectangular hole opened on the outer wall of the cylinder body;

[0007] After the needle is removed, the needle body enters the cylinder body through the needle hole, and the needle wings enter the rectangular hole through the first slit opening and the second slit opening in sequence, and the lower end of the needle body penetrates into the liquid-absorbing cotton column, realizing the absorption of residual blood and the locking of the needle.

[0008] Further, the cylinder body is made of PC or PVC material.

[0009] Further, the first slit opening and the second slit opening together form an L-shaped channel for the needle wings to enter, and the width of the L-shaped channel gradually decreases from outside to inside, with a large external opening and a small internal opening, for guiding the needle wings into the rectangular hole and forming a tight fit limit therein.

[0010] Further, the second slit is vertically arranged.

[0011] Further, the second slit is arranged in a V-shaped structure.

[0012] Further, the outer side of the barrel is provided with a clamping assembly, which comprises:

[0013] A fixed sleeve is fixed to the outer wall of the barrel;

[0014] An adapter rod is connected to one end of the fixed sleeve and the other end of the C-shaped clamping ring;

[0015] The C-shaped clamping ring is made of plastic, and the inner wall is in interference fit with the outer wall of the infusion tube end connecting seat. The C-shaped clamping ring is provided with a bayonet with a guide part, and the infusion tube connecting seat can be clamped into the C-shaped clamping ring through the guide part to realize the quick connection of the device and the infusion tube.

[0016] Further, the C-shaped clamping ring is integrally injection molded with the fixed sleeve and the adapter rod.

[0017] Further, the two V-shaped baffles are symmetrically and fixedly arranged on the top wall of the oblong hole.

[0018] Compared with the prior art, the disposable needle stick injury and pollution prevention device provided by the application provides a needle hole on the upper wall of the barrel for the needle to insert, the first slit and the second slit form an "L"-shaped rail groove, so that the needle wing is guided into the vertically arranged second slit under pressure and finally stopped in the oblong hole, forming a limit; at this time, the needle tip has entered the liquid absorbing cotton column, and the fiber capillary effect in the cotton column instantly absorbs the residual blood, preventing liquid drop from overflowing, and the needle is limited by the oblong hole and cannot retreat or slip off, realizing one-step needle stick and pollution prevention double protection of "insertion locking and locking liquid absorption".

[0019] And it meets the needs of high-intensity scenes such as emergency, ICU, infectious disease area, etc., so as to solve the two clinical pain points of "needle stick prevention" and "pollution prevention" at low cost, simple process and high safety, and facilitate popularization and use. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0021] Figure 1 The structure schematic diagram of the embodiment provided by the present application is shown in the following figure.

[0022] Figure 2This is a schematic diagram of the structure of Embodiment 2 provided by the present invention;

[0023] Figure 3 This is a schematic diagram of the L-shaped channel structure in Embodiment 3 of the present invention;

[0024] Figure 4 This is a schematic diagram of the C-type clamping ring structure provided by the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of the cylinder provided by the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of Embodiment 5 provided by the present invention;

[0027] Figure 7 Provided by the present invention Figure 6 A magnified view of a portion of point A in the middle.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Cylinder; 2. Absorbent cotton column; 3. Needle hole; 4. First seam opening; 5. Second seam opening; 6. Rectangular hole; 7. L-shaped channel; 8. Fixing sleeve; 9. C-shaped clamping ring; 91. Guide part; 92. Bayonet; 10. Connecting rod; 11. Baffle plate. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] As attached Figure 1 To be continued Figure 7 As shown:

[0032] Example 1:

[0033] This invention provides a disposable needlestick injury and contamination prevention device, comprising:

[0034] The cylinder 1 has an absorbent cotton column 2 installed and fixed inside it;

[0035] The upper wall of the cylinder 1 has a needle hole 3 for inserting a needle body, and a first slit 4 connected to the needle hole 3. The first slit 4 extends from the needle hole 3 to the outer edge of the top wall of the cylinder 1, and continues to extend downward along the outer wall of the cylinder 1 to form a second slit 5. The lower end of the second slit 5 is connected to a rectangular hole 6 opened on the outer wall of the cylinder 1.

[0036] After the needle is removed, the needle body enters the cylinder 1 through the needle hole 3, and its needle wings enter the rectangular hole 6 through the first slit 4 and the second slit 5 in sequence. The lower end of the needle body pierces the absorbent cotton column 2 to achieve the absorption of residual blood and the locking of the needle.

[0037] The second seam 5 is opened vertically.

[0038] As can be seen from the above, the needle hole 3 on the upper wall of the cylinder 1 provides an insertion channel for the needle. The first slit 4 and the second slit 5 form an "L"-shaped groove, which allows the needle wing to be guided into the vertically opened second slit 5 under pressure and finally locked in the rectangular hole 6, forming a limit. At this time, the needle tip has entered the absorbent cotton column 2. The capillary action of the fibers in the cotton column instantly absorbs the residual blood, preventing the liquid droplets from overflowing. At the same time, the needle tip is limited by the rectangular hole 6 and cannot be moved backward or slipped out, realizing a one-step double protection against needle puncture and contamination: "insertion locks, locking absorbs liquid".

[0039] As attached Figure 1 Appendix Figure 2 Appendix Figure 5 and appendix Figure 6 As shown, the cylinder 1 is made of PC or PVC material.

[0040] As can be seen from the above, the cylinder 1 is made of PC (polycarbonate) or PVC (polyvinyl chloride) material, which has high transparency, rigidity and chemical resistance: the transparent wall allows medical staff to see at a glance whether the needle tip is fully inserted into the absorbent cotton column 2, avoiding secondary touch verification; the material's flexural modulus is ≥1.5 GPa, which can provide a hard shell for the needle tip to prevent the needle tip from puncturing and escaping; the surface has high hardness, is resistant to alcohol, iodine, and blood stains, and will not crack or atomize during clinical disinfection, maintaining the visibility effect; at the same time, PC / PVC has a small molding shrinkage rate and dimensional stability, which can ensure that the dimensional accuracy of the needle hole 3, the first suture 4, the second suture 5 and the rectangular hole 6 is ≤0.05 mm, ensuring that the needle wings slide smoothly and lock accurately; both materials have passed the ISO 10993 biocompatibility test and support ethylene oxide or irradiation sterilization, meeting the requirements of single use, low cost and high safety.

[0041] Example 2:

[0042] This invention provides a disposable needlestick injury and contamination prevention device, comprising:

[0043] The cylinder 1 has an absorbent cotton column 2 installed and fixed inside it;

[0044] The upper wall of the cylinder 1 has a needle hole 3 for inserting a needle body, and a first slit 4 connected to the needle hole 3. The first slit 4 extends from the needle hole 3 to the outer edge of the top wall of the cylinder 1, and continues to extend downward along the outer wall of the cylinder 1 to form a second slit 5. The lower end of the second slit 5 is connected to a rectangular hole 6 opened on the outer wall of the cylinder 1.

[0045] After the needle is removed, the needle body enters the cylinder 1 through the needle hole 3, and its needle wings enter the rectangular hole 6 through the first slit 4 and the second slit 5 in sequence. The lower end of the needle body pierces the absorbent cotton column 2 to achieve the absorption of residual blood and the locking of the needle.

[0046] This embodiment is basically the same as the previous embodiment, except that, as shown in the appendix...Figure 2 As shown, the second seam 5 is set in a V-shape, and the width of the second seam 5 gradually decreases from top to bottom to form a V-shape.

[0047] As can be seen from the above, the V-shaped second slit 5 utilizes a wedge-shaped geometry that is "wider at the top and narrower at the bottom". When the wing enters the rectangular hole 6 through the narrowest part of the slit bottom, a self-locking effect is formed, preventing the needle from slipping upward under accidental shaking or external force pulling, thus achieving one-way locking and further improving the reliability of needle puncture prevention.

[0048] Example 3:

[0049] This invention provides a disposable needlestick injury and contamination prevention device, comprising:

[0050] The cylinder 1 has an absorbent cotton column 2 installed and fixed inside it;

[0051] The upper wall of the cylinder 1 has a needle hole 3 for inserting a needle body, and a first slit 4 connected to the needle hole 3. The first slit 4 extends from the needle hole 3 to the outer edge of the top wall of the cylinder 1, and continues to extend downward along the outer wall of the cylinder 1 to form a second slit 5. The lower end of the second slit 5 is connected to a rectangular hole 6 opened on the outer wall of the cylinder 1.

[0052] After the needle is removed, the needle body enters the cylinder 1 through the needle hole 3, and its needle wings enter the rectangular hole 6 through the first slit 4 and the second slit 5 in sequence. The lower end of the needle body pierces the absorbent cotton column 2 to achieve the absorption of residual blood and the locking of the needle.

[0053] This embodiment is basically the same as the previous embodiment, except that, as shown in the appendix... Figure 3 As shown, the first slit 4 and the second slit 5 together form an L-shaped channel 7 for the infusion set needle to enter, and the width of the L-shaped channel 7 gradually decreases from the outside to the inside, with a large outer opening and a small inner opening, which is used to guide the needle and form a tight fit limit in the rectangular hole 6.

[0054] As can be seen from the above, the wedge-shaped channel with "larger outer diameter and smaller inner diameter" generates gradually increasing lateral pressure during the sliding of the needle blade, causing the blade to undergo elastic micro-deformation after entering the rectangular hole 6, thus forming an interference fit with the hole wall; this interference force is greater than the frictional force of the needle retraction, ensuring reliable locking. At the same time, the wedge-shaped inlet reduces the alignment accuracy requirements, allowing medical staff to perform blind insertion while wearing gloves, improving the ease of operation.

[0055] Example 4:

[0056] This invention provides a disposable needlestick injury and contamination prevention device, comprising:

[0057] The cylinder 1 has an absorbent cotton column 2 installed and fixed inside it;

[0058] The upper wall of the cylinder 1 has a needle hole 3 for inserting a needle body, and a first slit 4 connected to the needle hole 3. The first slit 4 extends from the needle hole 3 to the outer edge of the top wall of the cylinder 1, and continues to extend downward along the outer wall of the cylinder 1 to form a second slit 5. The lower end of the second slit 5 is connected to a rectangular hole 6 opened on the outer wall of the cylinder 1.

[0059] After the needle is removed, the needle body enters the cylinder 1 through the needle hole 3, and its needle wings enter the rectangular hole 6 through the first slit 4 and the second slit 5 in sequence. The lower end of the needle body pierces the absorbent cotton column 2 to achieve the absorption of residual blood and the locking of the needle.

[0060] This embodiment is basically the same as the previous embodiment, except that, as shown in the appendix... Figure 1 and appendix Figure 4 As shown, a clamping assembly is provided on one side of the outer side of the cylinder 1, and the clamping assembly includes:

[0061] The fixing sleeve 8 is fixed to the outer wall of the cylinder 1;

[0062] The connecting rod 10 is connected to the fixed sleeve 8 at one end and to the C-shaped clamping ring 9 at the other end;

[0063] The C-shaped clamping ring 9 is made of plastic, and its inner wall is press-fitted with the outer wall of the infusion tube end connector. The C-shaped clamping ring 9 is provided with a bayonet 92 with a guide part 91. The infusion tube connector can be inserted into the C-shaped clamping ring 9 through the guide part 91 to realize the quick connection between the device and the infusion tube.

[0064] As can be seen from the above, the C-type clamping ring 9 forms a bayonet 92 through the guide part 91, so that the infusion tube connector can be pushed in smoothly and the plastic elastic rebound is used to complete the interference clamping; the connecting rod 10 suspends the cylinder 1 on one side of the infusion tube, which makes it convenient to use the device after the needle is removed.

[0065] Specifically, the C-type clamping ring 9 is integrally injection molded from medical-grade polypropylene (PP) copolymer. This material is ISO10993 biocompatibility certified, has an elongation at break of ≥30% and good low-temperature toughness (remains elastic even at -20 ℃), and can achieve an elastic deformation of 0.2 mm with a wall thickness of only 1 mm, thereby forming a stable interference fit for infusion tubing in the Φ3-6 mm range. It has excellent resistance to alcohol, iodine, and ethylene glycol, and will not crack due to stress caused by clinical disinfection. Moreover, its density is 0.9 g / cm³, and the weight of a single piece is <0.3 g, meeting the requirements of low cost, lightweight, and no shed particles for single use.

[0066] As attached Figure 1 As shown, the C-shaped clamping ring 9, the fixing sleeve 8, and the connecting rod 10 are integrally injection molded.

[0067] As can be seen from the above, one-piece injection molding eliminates assembly gaps and the risk of detachment. When the entire clamping assembly is subjected to lateral tensile force, the load can be evenly distributed to the outer wall of the fixing sleeve 8 and the cylinder 1, avoiding point stress concentration. Injection molding can complete the forming of the guide part 91 and the bayonet 92 in the same mold, ensuring consistent interference between batches, reducing manufacturing costs, and truly meeting the large-scale clinical needs for single use.

[0068] Example 5:

[0069] This invention provides a disposable needlestick injury and contamination prevention device, comprising:

[0070] The cylinder 1 has an absorbent cotton column 2 installed and fixed inside it;

[0071] The upper wall of the cylinder 1 has a needle hole 3 for inserting a needle body, and a first slit 4 connected to the needle hole 3. The first slit 4 extends from the needle hole 3 to the outer edge of the top wall of the cylinder 1, and continues to extend downward along the outer wall of the cylinder 1 to form a second slit 5. The lower end of the second slit 5 is connected to a rectangular hole 6 opened on the outer wall of the cylinder 1.

[0072] After the needle is removed, the needle body enters the cylinder 1 through the needle hole 3, and its needle wings enter the rectangular hole 6 through the first slit 4 and the second slit 5 in sequence. The lower end of the needle body pierces the absorbent cotton column 2 to achieve the absorption of residual blood and the locking of the needle.

[0073] This embodiment is basically the same as the previous embodiment, except that, as shown in the appendix... Figure 6 To be continued Figure 7 As shown, the inner top wall of the rectangular hole 6 is symmetrically and fixedly provided with two V-shaped baffles 11.

[0074] As can be seen from the above, the upper ends of the two V-shaped baffles 11 open towards the direction of needle wing entry, with an acute angle between them, and the lower ends are in contact and fit together. During the process of the needle wing sliding into the rectangular hole 6 through the two V-shaped baffles 11, the wing is first guided to the center by the V-shaped inclined surface, and then squeezed by the needle wing wing, causing the lower ends of the two V-shaped baffles 11 to open, and the needle wing is placed into the rectangular hole 6. Then the two V-shaped baffles 11 rebound, causing the lower ends of the baffles 11 to close, further forming a one-way limit on the needle wing, and the needle wing cannot slide upwards out.

[0075] Specifically, the baffle 11 is integrally injection molded from medical-grade polypropylene (PP) copolymer of the same material as the cylinder 1. This material has an elastic modulus of 1.5 GPa and an elongation at break of >30%. It can generate an elastic deformation force of more than 2 N with a wall thickness of 0.3 mm. It can provide sufficient unidirectional locking resistance, and is resistant to alcohol and iodine. It meets the biocompatibility requirements of ISO 10993 and has good thermal fusion with the PC / PVC cylinder, ensuring that the V-shaped structure remains elastic and does not rebound after long-term storage and ethylene oxide sterilization.

[0076] Example 6:

[0077] The method of using a disposable needlestick injury and contamination prevention device includes the following steps:

[0078] S1. After the intravenous infusion is completed, the medical staff pinch the needle wings to remove the needle, and then pull the C-shaped clamping ring 9 connected to the infusion tube along with the cylinder 1 to the bedside.

[0079] S2. Then, the needle is inserted vertically into the needle hole 3 on the top wall of the cylinder 1. After the needle tip penetrates the needle hole 3, it immediately pierces the absorbent cotton column 2. The capillary action of the cotton column instantly absorbs the residual blood.

[0080] S3. At the same time, the needle wing enters the rectangular hole 6 through the first seam 4 and then through the second seam 5;

[0081] S4. At this time, the needle tip is wrapped by the absorbent cotton column 2 and the needle wings are limited by the rectangular hole 6, so the needle cannot be moved backward or slipped to the side; thus achieving immediate protection against needle puncture and contamination.

[0082] In summary, the working principle of this device is as follows: After needle removal, medical personnel insert the needle through the needle hole 3 on the top wall of the cylinder 1. The needle tip pierces the absorbent cotton column 2, and the capillary action of the cotton column fibers instantly absorbs the residual blood, preventing the droplets from overflowing. The needle wings are guided smoothly along the L-shaped channel (first suture 4 → second suture 5 → rectangular hole 6), and elastic deformation occurs under the wedge-shaped contraction and interference fit of the hole wall, forming a limit. The interference force is greater than the friction force of the needle tip retraction, so that the needle wings are firmly locked in the rectangular hole 6, realizing one-step protection of "insertion and locking, locking and aspiration". The cylinder 1 is made of transparent PC / PVC, and the position of the needle tip can be visually confirmed. The vertical second suture 5 and the rectangular hole 6 form a "straight-straight" composite guide, realizing deceleration and self-locking, improving the smoothness and safety of operation. The outer C-shaped clamping ring 9 forms a bayonet 92 through the guide part 91, and the infusion tube connector can be pushed in smoothly. The high resilience of the medical-grade PP copolymer in the wall thickness 1 A 0.2 mm elastic deformation is generated at the mm position, forming a stable interference fit for the Φ3-6 mm infusion tubing. The one-piece injection molding eliminates assembly gaps, the load is evenly distributed, and the interference fit is consistent across batches. This meets the clinical needs of disposable, low-cost, lightweight, and particle-free infusion tubing, thus completing the entire closed-loop process of "carrying with the tubing - instant locking - rapid fluid aspiration - preventing needlesticking and contamination".

[0083] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A disposable needlestick injury prevention and contamination prevention device, characterized in that, include: The cylinder (1) has an absorbent cotton column (2) installed and fixed inside it. Among them, the upper wall of the cylinder (1) is provided with a needle hole (3) for inserting a needle body, and a first slit (4) connected to the needle hole (3). The first slit (4) extends from the needle hole (3) to the outer edge of the top wall of the cylinder (1), and continues to extend downward along the outer wall of the cylinder (1) to form a second slit (5). The lower end of the second slit (5) is connected to a rectangular hole (6) opened on the outer wall of the cylinder (1). After the needle is removed, the needle body enters the cylinder (1) through the needle hole (3) and its needle wings enter the rectangular hole (6) in sequence through the first slit (4) and the second slit (5). The lower end of the needle body pierces the absorbent cotton column (2) to achieve the absorption of residual blood and the locking of the needle.

2. The disposable needlestick injury prevention and contamination prevention device according to claim 1, characterized in that, The cylinder (1) is made of PC or PVC material.

3. The disposable needlestick injury prevention and contamination prevention device according to claim 1, characterized in that, The first slit (4) and the second slit (5) together form an L-shaped channel (7) for the infusion set needle to enter. The width of the L-shaped channel (7) gradually decreases from the outside to the inside, with a large outer opening and a small inner opening, which is used to guide the needle and form a tight fit limit in the rectangular hole (6).

4. The disposable needlestick injury prevention and contamination prevention device according to claim 1, characterized in that, The second seam (5) is vertically opened.

5. The disposable needlestick injury prevention and contamination prevention device according to claim 1, characterized in that, The second seam (5) is set in a V-shaped structure.

6. The disposable needlestick injury prevention and contamination prevention device according to claim 1, characterized in that, A clamping assembly is provided on one side of the outer side of the cylinder (1), the clamping assembly comprising: A fixing sleeve (8) is fixed to the outer wall of the cylinder (1); The connecting rod (10) is connected to the fixed sleeve (8) at one end and to the C-type clamping ring (9) at the other end. The C-type clamping ring (9) is made of plastic, and its inner wall is press-fitted with the outer wall of the infusion tube end connector. The C-type clamping ring (9) is provided with a bayonet (92) with a guide part (91). The infusion tube connector can be inserted into the C-type clamping ring (9) through the guide part (91) to realize the quick connection between the device and the infusion tube.

7. The disposable needlestick injury prevention and contamination prevention device according to claim 1, characterized in that, The C-shaped clamping ring (9) is integrally injection molded with the fixing sleeve (8) and the connecting rod (10).

8. The disposable needlestick injury prevention and contamination prevention device according to claim 1, characterized in that, The inner top wall of the rectangular hole (6) is symmetrically and fixedly provided with two V-shaped baffles (11).

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