A needle protector for a syringe

Abstract

The utility model provides a kind of injection needle protection structure of anti-stabbing, the utility model relates to medical instrument technical field, including pipe head, pipe head one end embeds with needle holder, and the inner end of needle holder is through with inner cavity pipe between pipe head and is set, pipe head is fixed with needle tube frame, and needle tube frame inside and inner cavity pipe between sliding fit have pressure plate, needle tube frame and inner cavity pipe between through setting have needle slot;Needle tube frame and pressure plate connecting end form sealed gas cavity;The beneficial effects of the utility model are that: structure is connected as the protection head of needle head part and the expansion hose of needle tube end by the sealed gas cavity in needle holder, and the telescopic pipe structure of protection head is acted by the sealed gas cavity air pressure thereof, and the telescopic cooperation needle head part of telescopic pipe can be through before and after extracting liquid medicine, and according to air pressure reset telescopic pipe, so as to pass through protective sleeve as the side protection structure of needle head, the condition of needle sharp instrument is avoided while protecting needle head.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to a syringe needle protection structure to prevent puncture wounds. Background Technology

[0002] The risk of needle stick-out injuries is a significant occupational safety hazard in medical procedures. In particular, exposure of used needles can lead to accidental stick-out injuries to medical staff or patients, resulting in infection with blood-borne diseases (such as HIV, hepatitis B, and hepatitis C). High-risk scenarios include recapping needles, separating needles, and disposing of medical waste. The sharp bevel design of traditional needles and the lack of immediate protection mechanisms exacerbate the exposure risk. In clinical practice, the actions of recaping the syringe after drawing medication and the preparation of the syringe before injection pose a risk of sharps injury due to exposed needles. Existing protective devices often use the telescopic structure inside the needle tube and needle hub as a protective buffer for the needle. However, the movement of the telescopic structure can alter the injection action. Furthermore, the built-in telescopic structure of the needle hub and needle increases the length of the connection between the needle and the needle tube, expanding the space for residual medication and affecting the precise dosage control of the syringe. Utility Model Content

[0003] The technical problem this invention aims to solve is that the protective structure of existing syringes has the problem of affecting the injection action due to the elastic buffering telescopic structure, which expands the space for residual medicine. In order to address the problems of the existing technology, this invention provides a syringe needle protection structure to prevent puncture wounds.

[0004] The purpose and effect of this utility model are achieved by the following specific technical means: including a tube head, one end of which is fitted with a needle seat, an inner cavity tube is provided through the inner end of the needle seat and the tube head, a needle tube frame is fixed on the tube head, and a pressure plate is slidably fitted between the inner side of the needle tube frame and the inner cavity tube, and a needle groove is provided through the needle tube frame and the inner cavity tube. The needle holder and the pressure plate are connected to form a sealed air cavity, and the needle groove forms an expansion tube in the sealed air cavity. A valve port is connected to one side of the sealed air cavity, and a connecting tube is connected to the outside of the valve port. The end of the connecting pipe is fixed with a protective head. The protective head is a double-segmented semi-arc tube structure, and the splicing end of the protective head is slidably fitted with a telescopic tube. A valve seat is connected between the telescopic tube and the connecting pipe. Both ends of the protective head protrude to form a clamp-type semi-circular frame.

[0005] Furthermore: an arc-shaped support plate is inserted into one side of the outer end of the needle tube holder at the tube head, and the support plate is fixed to the connecting tube.

[0006] A further preferred embodiment: the expansion hose is a rubber disc-shaped tube, and the outer end of the expansion hose is tightly engaged with the pressure plate.

[0007] A further preferred embodiment: an insert head is embedded between the expansion tubing and the needle holder, the insert head being a tubular liquid plug.

[0008] A further preferred embodiment: the end of the telescopic tube is an inwardly concave shaft tube groove structure, and the sliding stroke of the telescopic tube matches the air pressure of the sealed air chamber.

[0009] A further preferred embodiment: the outer end of the protective head is covered with an outer membrane, the outer membrane being a sterile plastic film structure, and both ends of the outer membrane being fixed to the two ends of the semi-arc tube of the protective head.

[0010] The beneficial effects of this utility model are: This syringe needle protection structure, designed to prevent punctures, connects a protective head (serving as the needle tip) and an expansion tube at the needle end via a sealed air chamber in the needle hub. The air pressure within the sealed chamber acts on the telescopic tube of the protective head. Before and after drawing medication, the telescopic tube expands and contracts in conjunction with the needle tip's suction action, and returns to its original position based on air pressure. This protective sleeve acts as a side protection structure for the needle tip, protecting it from sharp object punctures. Furthermore, the protective head can be removed via an external connecting tube before injection. The entire protective structure utilizes the sealed air chamber to act on the contraction of the expansion tube, shortening the needle hub connection section during injection and reducing medication residue, thus improving the structure's protective effectiveness and practicality. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the tube head and needle seat of this utility model; Figure 3 This is a schematic diagram of the internal structure of the protective head of this utility model.

[0013] Figures 1-3 In the middle: 1. Tube head 2. Needle seat 3. Support plate 4. Protective head 5. Connecting tube 6. Inner tube 7. Needle tube holder 8. Expansion tube 9. Pressure plate 10. Sealing air chamber 11. Valve port 11. Embedded head 12. Outer membrane 13. Valve seat 14. Telescopic tube 15. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features, and advantages of this utility model, the following description is provided in conjunction with the accompanying drawings. Figures 1-3The present invention will be further described in detail below with specific embodiments. The following embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any modifications and refinements made without departing from the scope of the present invention are within the patent protection scope of the present invention.

[0015] A syringe needle protection structure for preventing puncture wounds includes a tube head 1, a needle seat 2 embedded at one end of the tube head 1, an inner cavity tube 6 that is provided through the inner end of the needle seat 2 and the tube head 1, a needle tube frame 7 fixed on the tube head 1, and a pressure plate 9 that is slidably fitted between the inner side of the needle tube frame 7 and the inner cavity tube 6, and a needle groove that is provided through the needle tube frame 7 and the inner cavity tube 6. A sealed air chamber 10 is formed at the connection end between the needle holder 7 and the pressure plate 9, and an expansion hose 8 is formed in the sealed air chamber 10 in the needle groove. A valve port 11 is connected to one side of the sealed air chamber 10, and a connecting pipe 5 is connected to the outside of the valve port 11. The end of the connecting pipe 5 is fixed with a protective head 4. The protective head 4 is a double-segmented semi-arc pipe structure, and the splicing end of the protective head 4 is slidably fitted with a telescopic pipe 15. A valve seat 14 is connected between the telescopic pipe 15 and the connecting pipe 5. Both ends of the protective head 4 protrude to form a clamp-type semi-circular frame. The structure mainly uses a snap-fit ​​protective head 4 as the side buckle structure of the needle end. The protective head 4 uses a two-section semi-arc tube that can be telescopically fitted to match the edge of the needle. During the operation of drawing out the liquid, the protective head 4 can extend and retract in the same direction as the needle is inserted into the liquid bottle to adapt to the insertion of the needle. After the extraction is completed, the telescopic tube 15 is connected to the external connecting tube 5 through a sealed air chamber 10. The air pressure in the chamber resets the telescopic tube 15, protecting the operation process before the needle is injected. At the same time, the sealed air chamber 10 is provided with a needle groove for the needle to enter. An expansion tube 8 is used as the needle connection structure. The expansion tube 8 is placed in the sealed air chamber 10, and a pressure plate 9 with a piston at one end is used as the compression structure of the expansion tube 8. During the injection, the short-stroke contraction of the needle tube frame 7 cooperates with the compression of the pressure plate 9 to squeeze the expansion tube 8. Before the injection, the protective head 4 is removed from the needle end by pulling out the connecting tube 5, and the residual liquid in the needle seat 2 is squeezed out by squeezing the injection. Compared to traditional protective structures, this structure uses an external connecting tube 5 and an attached protective head 4 to replace the needle cap for needle protection. During syringe extraction, it can simultaneously reset and protect the needle, avoiding the risk of sharps injury from accidental operation. Compared to internal elastic expansion and contraction to protect the needle, it can use the sealed air chamber 10 to match the contraction function of the expansion tube 8 with the protective function of the protective head 4. With the inward compression of the injection action, at the end of the injection action, the contraction of the expansion tube 8 reduces the entire connection section from the injection tube to the needle head, thereby reducing the volume of the intermediate section and reducing drug residue, thus improving the protective and practical properties of the structure. Among them, the tube head 1 has an arc-shaped support plate 3 inserted into one side of the outer end of the needle tube frame 7. The support plate 3 is fixed to the connecting tube 5. The support plate 3 serves as the side end abutment structure from the tube head 1 to the end of the needle. It can cooperate with the end of the tube head 1 to fix the connecting tube 5, and the support of the support plate 3 structure can strengthen the external structure of the needle end connected to the needle tube frame 7. Furthermore, the expansion hose 8 is a rubber disc-shaped tube, and its outer end is tightly connected to the pressure plate 9, such as... Figure 2 As shown, the expansion tube 8 serves as the connecting section between the needle holder 7 and the needle groove of the inner tube 6. The expansion tube 8 acts as a transfer cavity for the extraction and injection of the injection solution. At the end of the injection action, the contraction of the expansion tube 8 can easily squeeze out the residual solution, reducing the solution residue at the needle hub 2. Based on the above, an insert head 12 is embedded between the expansion tubing 8 and the needle holder 7. The insert head 12 is a tubular liquid orifice plug, such as... Figure 2 As shown, the embedded head 12 is used as a snap-fit ​​connection end of the needle structure, which, together with the docking of the shaft tube and the needle tube, provides an internal seal between the needle and the needle tube holder 7 and ensures the smooth flow of the injected drug.

[0016] Furthermore, the end of the telescopic tube 15 has an inwardly concave axial tube groove structure, and the sliding stroke of the telescopic tube 15 matches the air pressure of the sealing air chamber 10, such as... Figure 3 As shown, the extension stroke of the telescopic tube 15 is strictly controlled by the air volume of the sealed air chamber 10. That is, under the stable air pressure of the sealed air chamber 10, the required insertion force for the damping composite needle to insert into the medicine bottle for extraction during the extension stroke of the telescopic tube 15 is achieved. In addition, the concave shaft tube inside the telescopic tube 15 can ensure the accuracy of the axial extension and contraction of the telescopic tube 15, and avoid the shaft tube extension and contraction offset from affecting the extension and contraction position of the protective head 4.

[0017] Furthermore, the outer end of the protective head 4 is covered with an outer membrane 13, which is a sterile plastic film structure. The two ends of the outer membrane 13 are fixed to the two ends of the semi-arc tube of the protective head 4, respectively. The outer membrane 13 is used to package and protect the protective head 4. At the same time, the expansion and contraction of the outer membrane 13 can be adapted to the expansion and contraction of the protective head 4.

[0018] The structure uses a replaceable needle hub 2 as the intermediate structure between the needle tube and the needle tip. Its protective head 4 is axially fixed to the needle tip by a snap-fit. During the operation of drawing out the liquid medicine, the protective head 4 can extend and retract the telescopic tube 15 in the same direction as the needle tip is inserted into the liquid medicine bottle to adapt to the insertion action of the needle tip. After the extraction is completed, the telescopic tube 15 is connected to the sealed air chamber 10 of the external connecting tube 5 through the telescopic tube 15, and the telescopic tube 15 is reset by air pressure. The sharp end of the needle tip is protected by the side cover of the protective head 4, and the operation process is protected before the needle tip is injected. Before the injection, the protective head 4 and the connecting tube can be removed through the external connecting tube 5. During the injection, the short-stroke contraction of the needle holder 7 is used to cooperate with the compression of the pressure plate 9 to squeeze the expansion tube 8. The contraction of the expansion tube 8 squeezes out the residual medicine at the needle hub 2 at the end of the injection.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A syringe needle protection structure to prevent puncture wounds, characterized in that: Includes a tube head (1), one end of which is fitted with a needle seat (2), and an inner cavity tube (6) is provided through the inner end of the needle seat (2) and the tube head (1). A needle tube frame (7) is fixed on the tube head (1), and a pressure plate (9) is slidably fitted between the inner side of the needle tube frame (7) and the inner cavity tube (6). A needle groove is provided through the needle tube frame (7) and the inner cavity tube (6). The needle holder (7) and the pressure plate (9) are connected to form a sealed air chamber (10), and the needle groove is formed in the sealed air chamber (10) with an expansion hose (8). A valve port (11) is connected to one side of the sealed air chamber (10), and a connecting pipe (5) is connected to the outside of the valve port (11). The end of the connecting pipe (5) is fixed with a protective head (4). The protective head (4) is a double-segment spliced ​​semi-arc pipe structure, and the splicing end of the protective head (4) is slidably fitted with a telescopic pipe (15). A valve seat (14) is connected between the telescopic pipe (15) and the connecting pipe (5). Both ends of the protective head (4) protrude to form a clamp-type semi-circular frame.

2. The syringe needle protection structure for preventing puncture wounds according to claim 1, characterized in that: The tube head (1) has an arc-shaped support plate (3) inserted into one side of the outer end of the needle tube holder (7), and the support plate (3) is fixed to the connecting tube (5).

3. The syringe needle protection structure for preventing puncture wounds according to claim 1, characterized in that: The expansion hose (8) is a rubber disc tube, and the outer end of the expansion hose (8) is tightly connected to the pressure plate (9).

4. The syringe needle protection structure for preventing puncture wounds according to claim 1, characterized in that: An insert head (12) is fitted between the expansion hose (8) and the needle holder (7), and the insert head (12) is a tubular liquid plug.

5. The syringe needle protection structure for preventing puncture wounds according to claim 1, characterized in that: The end of the telescopic tube (15) is a axial tube groove structure that is concave inward, and the sliding stroke of the telescopic tube (15) matches the air pressure of the sealed air chamber (10).

6. The syringe needle protection structure for preventing puncture wounds according to claim 1, characterized in that: The outer end of the protective head (4) is covered with an outer membrane (13), which is a sterile plastic film structure, and the two ends of the outer membrane (13) are respectively fixed to the two ends of the semi-arc tube of the protective head (4).

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