A nested needle retention device

Abstract

This utility model relates to the field of medical device technology, specifically a sleeve-type indwelling needle care device, including an inner needle assembly and an outer needle assembly. The outer needle assembly includes an outer needle and an outer needle housing. The outer needle is fixedly disposed on one side of the outer needle housing. An extension tube is provided at the upper end of the outer side wall of the outer needle housing. An isolation plug is provided inside the outer needle housing between the extension tube and the protective sleeve. The inner needle assembly includes an inner needle, a slider, a protective sleeve, a needle retrieval mechanism, and a limiting mechanism. One end of the protective sleeve is slidably disposed inside the outer needle housing, and the other end of the protective sleeve extends to the outside of the outer needle housing. The slider is slidably disposed inside the protective sleeve, and the inner needle is slidably disposed inside the outer needle. One end of the inner needle penetrates into the inside of the protective sleeve and is fixedly connected to the slider. The needle retrieval mechanism includes two push plates. This utility model can automatically protect the needle tip of the inner needle when it is pulled out, preventing accidental injury to personnel, improving safety, and has a simple structure and high reliability.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically a sleeve-type indwelling needle care device. Background Technology

[0002] An indwelling catheter, also known as a venous cannula, is a medical device used for intravenous infusion. It mainly consists of a stainless steel needle core, a flexible catheter, and a plastic needle hub. During use, the catheter and needle core are inserted together into the blood vessel. Once the flexible catheter is fully inside the vessel, the needle core is withdrawn, leaving only the flexible catheter in place for intravenous infusion.

[0003] In recent years, the risk of infection with HIV, hepatitis virus, etc., caused by medical personnel being accidentally punctured by the sharp tip of blood-contaminated injection needles has become a problem in the existing technology. Therefore, we have introduced a sleeve-type indwelling needle care device. Utility Model Content

[0004] The purpose of this utility model is to provide a sleeve-type indwelling needle care device that can automatically protect the needle tip of the inner needle when it is pulled out, preventing accidental injury to personnel, improving safety, and having a simple structure and high reliability, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A sleeve-type indwelling needle care device includes an inner needle assembly and an outer needle assembly. The outer needle assembly includes an outer needle and an outer needle housing. The outer needle is fixedly disposed on one side of the outer needle housing. An extension tube is provided at the upper end of the outer side wall of the outer needle housing. An isolation plug is provided inside the outer needle housing between the extension tube and the protective sleeve. The inner needle assembly includes an inner needle, a slider, a protective sleeve, a needle retrieval mechanism, and a limiting mechanism. One end of the protective sleeve is slidably disposed inside the outer needle housing, and the other end of the protective sleeve extends to the outside of the outer needle housing. The slider is slidably disposed inside the protective sleeve. The inner needle is slidably disposed inside the outer needle, and one end of the inner needle penetrates into the inside of the protective sleeve and is fixedly connected to the slider.

[0007] As a further embodiment of this utility model, the needle-retrieving mechanism includes two push plates, which are respectively fixedly disposed on both sides of the slider. Both sides of the protective sleeve are provided with strip-shaped holes that cooperate with the push plates, and one side of the push plate passes through the strip-shaped hole and extends to the outside of the protective sleeve.

[0008] As a further embodiment of this utility model, the limiting mechanism includes two elastic plates. The protective sleeve has grooves on both sides of one end near the outer needle housing. One end of the elastic plate is fixedly disposed on the groove wall near the outer needle. The middle part of the elastic plate extends to the outside of the groove. The inner side wall of the outer needle housing is provided with an annular limiting groove that cooperates with the elastic plate.

[0009] As a further embodiment of this invention, the elastic sheet is configured as an arc shape.

[0010] As a further embodiment of this invention, the push plate is configured as a circle.

[0011] As a further embodiment of this utility model, multiple anti-slip protrusions are provided on both sides of the push plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This indwelling needle care device consists of an extension tube, push plates, a protective sleeve, an outer needle housing, an inner needle, an outer needle, an isolation plug, a slider, an elastic plate, an annular limiting groove, and anti-slip protrusions. Pushing the two push plates causes the inner needle to be inserted into the blood vessel. To remove the inner needle, one hand first positions the outer needle housing, then pulls the two push plates away from the outer needle housing. The elastic plate engages with the annular limiting groove, which, together with the elastic plate, limits the protective sleeve. The push plates drive the slider to slide within the protective sleeve, and the slider carries the inner needle into the protective sleeve. After the inner needle leaves the isolation plug, the hole in the middle of the isolation plug closes. When the slider is pressed against the lower end of the protective sleeve, the slider moves the protective sleeve, and the annular limiting groove pushes the elastic plate to one side of the slider, bending it into the groove. This allows the protective sleeve to be completely removed from the outer needle housing. The device automatically protects the inner needle tip during removal, preventing accidental injury and improving safety. It also features a simple structure and high reliability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a sleeve-type indwelling needle care device.

[0015] Figure 2 This is a side view of a sleeve-type indwelling needle care device.

[0016] Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle.

[0017] In the diagram: 1. Extension tube; 2. Push plate; 3. Protective sleeve; 4. Outer needle housing; 5. Inner needle; 6. Outer needle; 7. Isolation plug; 8. Slider; 9. Elastic sheet; 10. Annular limiting groove; 11. Anti-slip protrusion. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1 to 3 This utility model provides a technical solution:

[0020] A sleeve-type indwelling needle care device includes an inner needle assembly and an outer needle assembly. The outer needle assembly includes an outer needle 6 and an outer needle housing 4. The outer needle 6 is fixedly disposed on one side of the outer needle housing 4. An extension tube 1 is provided at the upper end of the outer side wall of the outer needle housing 4. An isolation plug 7 is provided inside the outer needle housing 4 between the extension tube 1 and the protective sleeve 3. The inner needle assembly includes an inner needle 5, a slider 8, a protective sleeve 3, a needle retrieval mechanism, and a limiting mechanism. One end of the protective sleeve 3 is slidably disposed inside the outer needle housing 4, and the other end of the protective sleeve 3 extends to the outside of the outer needle housing 4. The slider 8 is slidably disposed inside the protective sleeve 3. The inner needle 5 is slidably disposed inside the outer needle 6, and one end of the inner needle 5 penetrates into the inside of the protective sleeve 3 and is fixedly connected to the slider 8.

[0021] refer to Figure 1 and Figure 2 The needle retrieval mechanism includes two push plates 2, which are fixedly mounted on both sides of the slider 8. Both sides of the protective sleeve 3 are provided with strip-shaped holes that cooperate with the push plates 2. One side of the push plate 2 passes through the strip-shaped hole and extends to the outside of the protective sleeve 3. The push plate 2 is circular, which can improve the ability of medical staff to push the push plate 2. Both sides of the push plate 2 are provided with multiple anti-slip protrusions 11, which can increase the friction of the side wall of the push plate 2.

[0022] refer to Figure 2 and Figure 3 The limiting mechanism includes two elastic pieces 9. The protective sleeve 3 has grooves on both sides of one end near the outer needle housing 4. One end of the elastic piece 9 is fixedly set on the groove wall near the outer needle 6. The middle part of the elastic piece 9 extends to the outside of the groove. The inner side wall of the outer needle housing 4 is provided with an annular limiting groove 10 that cooperates with the elastic piece 9. The elastic piece 9 is set in an arc shape, which makes it easy for the outer needle housing 4 to drive the elastic piece 9 to bend.

[0023] In use, push the two push plates 2 to insert the inner needle 5 into the blood vessel. When removing the inner needle 5, first use one hand to position the outer needle housing 4, and pull the two push plates 2 away from the outer needle housing 4. Since the elastic plate 9 is engaged with the annular limiting groove 10, the annular limiting groove 10 and the elastic plate 9 cooperate to limit the protective sleeve 3. The push plate 2 drives the slider 8 to slide inside the protective sleeve 3. The slider 8 drives the inner needle 5 into the protective sleeve 3. After the inner needle 5 leaves the isolation plug 7, the hole in the middle of the isolation plug 7 closes. When the slider 8 is pressed against the lower end of the protective sleeve 3, the slider 8 drives the protective sleeve 3 to move. The annular limiting groove 10 pushes the elastic plate 9 to one side of the slider 8 and bends it into the groove. Then the protective sleeve 3 can be completely removed from the outer needle housing 4. When the inner needle 5 is pulled out, the needle tip of the inner needle 5 is automatically protected to prevent the needle tip of the inner needle 5 from causing accidental injury to personnel, which improves safety. Moreover, the structure is simple and highly reliable.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sleeve-type indwelling needle care device, comprising an inner needle assembly and an outer needle assembly, characterized in that: The outer needle assembly includes an outer needle (6) and an outer needle housing (4). The outer needle (6) is fixedly disposed on one side of the outer needle housing (4). An extension tube (1) is provided on the upper end of the outer side wall of the outer needle housing (4). An isolation plug (7) is provided inside the outer needle housing (4) between the extension tube (1) and the protective sleeve (3). The inner needle assembly includes an inner needle (5), a slider (8), a protective sleeve (3), a needle taking mechanism, and a limiting mechanism. One end of the protective sleeve (3) is slidably disposed inside the outer needle housing (4), and one end of the protective sleeve (3) extends to the outside of the outer needle housing (4). The slider (8) is slidably disposed inside the protective sleeve (3). The inner needle (5) is slidably disposed inside the outer needle (6). One end of the inner needle (5) penetrates into the inside of the protective sleeve (3) and is fixedly connected to the slider (8).

2. The sleeve-type indwelling needle care device according to claim 1, characterized in that: The needle-taking mechanism includes two push plates (2), which are fixedly mounted on both sides of the slider (8). The protective sleeve (3) has strip holes on both sides that cooperate with the push plates (2). One side of the push plate (2) passes through the strip hole and extends to the outside of the protective sleeve (3).

3. The sleeve-type indwelling needle care device according to claim 1, characterized in that: The limiting mechanism includes two elastic pieces (9). The protective sleeve (3) has grooves on both sides of one end near the outer needle housing (4). One end of the elastic piece (9) is fixedly set on the groove wall near the outer needle (6). The middle part of the elastic piece (9) extends to the outside of the groove. The inner side wall of the outer needle housing (4) is provided with an annular limiting groove (10) that cooperates with the elastic piece (9).

4. The sleeve-type indwelling needle care device according to claim 3, characterized in that: The elastic sheet (9) is configured to be arc-shaped.

5. A sleeve-type indwelling needle care device according to claim 2, characterized in that: The push plate (2) is circular.

6. The sleeve-type indwelling needle care device according to claim 2, characterized in that: The push plate (2) has multiple anti-slip protrusions (11) on both sides.

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