Bacteriostatic remaining needle

Abstract

The utility model discloses a bacteriostatic remaining needle which comprises a needle tube seat, a connector is embedded in the lower end face of the needle tube seat, an outer connecting tube is connected with an inner cavity of the connector in a sleeved mode, an anti-reversing assembly is installed at the other end of the needle tube seat, and a needle head assembly is installed at the other end of the anti-reversing assembly. The anti-reversing assembly comprises an outer cylinder fixed to one end of the needle tube seat, a conical groove is fixed to one end of an inner cavity of the outer cylinder, a supporting frame is fixed to the inner cavity of the outer cylinder, and a compression spring is fixed to one end of the supporting frame. According to the indwelling needle, when medicine is fed through the indwelling needle, liquid medicine jacks the conical head through pressure, the through opening of the conical groove is exposed, the liquid medicine can pass through the inner cavity of the conical groove to be fed, after medicine feeding is stopped, the pressure of the liquid medicine disappears, and at the moment, the conical head can be extruded to extend into the inner cavity of the conical groove through the elastic characteristic of the compression spring; when the conical groove port is blocked, liquid at the indwelling needle head can be prevented from flowing back, blood of a patient can be prevented from flowing back, and the indwelling needle head is safer.

Description

Technical Field

[0001] The utility model relates to the technical field of indwelling needle equipment, in particular to an antibacterial indwelling needle. Background Art

[0002] An antibacterial indwelling needle is a medical device, also known as a central venous catheter. It is a tube inserted into the body and can be left in the vein for a long time to infuse drugs, infusions or blood products to provide nutritional support or other treatments to patients. The difference between an antibacterial indwelling needle and an ordinary intravenous catheter is that it has an additional antibacterial function. The surface of the antibacterial indwelling needle is usually coated with antibacterial substances, such as sulfide or silver ions, which can inhibit the growth of bacteria and reduce the risk of infection.

[0003] The patent document with publication number CN216571057U discloses an indwelling needle assembly with an indwelling needle protection part, including an infusion tee and an indwelling needle protection part adjacent to the infusion tee, wherein the indwelling needle protection part of the infusion tee is provided with a hole-shaped extension structure, which serves to accommodate and protect the indwelling needle.

[0004] In the above device, although the indwelling needle can be stored, protected and isolated, reducing the risk of medical contamination, the indwelling needle is inserted into the patient's body for a long time during use, and it does not have the function of preventing liquid backflow, making it easy for the patient's blood to flow back, and it does not have a safer indwelling function. Utility Model Content

[0005] The utility model aims to solve the problem that the existing antibacterial indwelling needle has a problem that the indwelling needle head is inserted into the patient's body for a long time and has no function of preventing liquid backflow, so that the patient's blood is prone to backflow and has no disadvantage of safer indwelling.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An antibacterial indwelling needle comprises a needle tube seat, a connector is embedded in the lower end surface of the needle tube seat, an external tube is sleeved in the inner cavity of the connector, an anti-reversal component is installed at the other end of the needle tube seat, and a needle assembly is installed at the other end of the anti-reversal component;

[0008] The anti-reversal component includes an outer cylinder fixed to one end of the needle tube seat, a conical groove is fixed to one end of the inner cavity of the outer cylinder, a support frame is fixed to the inner cavity of the outer cylinder, a compression spring is fixed to one end of the support frame, and a conical head is fixed to the extended end of the compression spring;

[0009] The needle assembly comprises a needle seat sleeved on one end of the outer cylinder, a rubber ring is melt-connected on the surface of the needle seat, and a retention needle is installed at one end of the needle seat.

[0010] As a further description of the above technical solution:

[0011] One end of the tapered groove is connected to the output end of the needle tube seat.

[0012] As a further description of the above technical solution:

[0013] The conical head is sleeved with the inner cavity of the conical groove, and the conical head forms an elastic telescopic structure with the support frame through a compression spring.

[0014] As a further description of the above technical solution:

[0015] The rubber ring is movably connected to the inner wall of the outer cylinder, and the needle seat forms a snap-fit ​​structure with the outer cylinder through the rubber ring.

[0016] As a further description of the above technical solution:

[0017] The connector output end is connected to the inner cavity of the needle tube seat.

[0018] As a further description of the above technical solution:

[0019] A rubber plug is inserted into the inner cavity of one end of the needle tube seat, an end cover is fixed on the surface of the rubber plug, a connecting piece is fixed on the upper end surface of the end cover, and the connecting piece is movably connected to the upper end surface of the needle tube seat.

[0020] As a further description of the above technical solution:

[0021] The end cover forms an assembleable structure with the needle tube seat through the rubber plug.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0023] In the utility model, when delivering medicine through the indwelling needle, the medicine liquid pushes the conical head through the pressure, exposing the opening of the conical groove, and the medicine liquid can pass through the inner cavity of the conical groove to deliver the medicine. When the medicine delivery is stopped, the medicine liquid pressure disappears. At this time, through the elastic characteristics of the compression spring, the conical head can be squeezed into the inner cavity of the conical groove to block the opening of the conical groove, which can prevent the liquid at the indwelling needle from flowing back and the patient's blood from flowing back, making the indwelling needle safer. In summary, the problems in the background technology are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front view of the structure of an antibacterial indwelling needle in the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of a rear view of an antibacterial indwelling needle in the utility model;

[0026] Figure 3It is a schematic structural diagram of a cross-section of an antibacterial indwelling needle in the utility model;

[0027] Figure 4 It is a structural schematic diagram of the anti-reversal component in the utility model.

[0028] Legend:

[0029] 1. Needle tube seat; 2. Connecting head; 3. External tube; 4. Rubber plug; 5. End cover; 6. Connecting piece; 7. Anti-reverse assembly; 701. Outer cylinder; 702. Conical groove; 703. Support frame; 704. Compression spring; 705. Conical head; 8. Needle assembly; 801. Needle seat; 802. Rubber ring; 803. Indwelling needle. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Reference Figure 1-Figure 4 An antibacterial indwelling needle comprises a needle tube seat 1, a connector 2 is embedded in the lower end surface of the needle tube seat 1, an external tube 3 is sleeved in the inner cavity of the connector 2, an anti-reversal component 7 is installed at the other end of the needle tube seat 1, and a needle assembly 8 is installed at the other end of the anti-reversal component 7;

[0032] The anti-reversal component 7 includes an outer cylinder 701 fixed to one end of the needle tube seat 1, a conical groove 702 is fixed to one end of the inner cavity of the outer cylinder 701, a support frame 703 is fixed to the inner cavity of the outer cylinder 701, a compression spring 704 is fixed to one end of the support frame 703, and a conical head 705 is fixed to the extended end of the compression spring 704;

[0033] The needle assembly 8 includes a needle seat 801 sleeved on one end of the outer cylinder 701, a rubber ring 802 is melt-connected on the surface of the needle seat 801, and an indwelling needle 803 is installed at one end of the needle seat 801;

[0034] The needle holder 801 at one end of the indwelling needle 803 is inserted into one end of the outer cylinder 701, and the needle holder 801 is engaged in the inner cavity of the outer cylinder 701 through the rubber ring 802;

[0035] The external tube 3 is inserted into the inner cavity of the connector 2, and liquid medicine is fed into the needle holder 1 through the external tube 3. The liquid medicine pushes the conical head 705 by pressure, so that the conical head 705 is compressed by the compression spring 704, and the conical head 705 moves out of the conical groove 702, exposing the opening of the conical groove 702. The liquid medicine passes through the inner cavity of the conical groove 702 and can be discharged from the indwelling needle 803.

[0036] When the external tube 3 stops delivering medicine, the pressure of the medicine liquid disappears. At this time, through the elastic characteristics of the compression spring 704, the conical head 705 is squeezed into the inner cavity of the conical groove 702 to block the opening of the conical groove 702, thereby preventing the liquid at the indwelling needle 803 from flowing back.

[0037] Furthermore, one end of the tapered groove 702 is connected to the output end of the needle tube seat 1 .

[0038] Furthermore, the conical head 705 is sleeved with the inner cavity of the conical groove 702 , and the conical head 705 forms an elastic telescopic structure with the support frame 703 through the compression spring 704 .

[0039] Furthermore, the rubber ring 802 is movably connected to the inner wall of the outer cylinder 701 , and the needle seat 801 forms a snap-fit ​​structure between the rubber ring 802 and the outer cylinder 701 .

[0040] Furthermore, the output end of the connector 2 is connected to the inner cavity of the needle tube seat 1 .

[0041] Furthermore, a rubber plug 4 is inserted into the inner cavity of one end of the needle tube seat 1, an end cover 5 is fixed on the surface of the rubber plug 4, a connecting piece 6 is fixed on the upper end surface of the end cover 5, and the connecting piece 6 is movably connected to the upper end surface of the needle tube seat 1.

[0042] Furthermore, the end cover 5 forms an assemblable structure with the needle tube seat 1 through the rubber plug 4 .

[0043] Working principle: Before use, first insert the needle seat 801 at one end of the indwelling needle 803 into one end of the outer cylinder 701, and make the needle seat 801 fit into the inner cavity of the outer cylinder 701 through the rubber ring 802, and then insert the external tube 3 into the inner cavity of the connector 2, and send the medicine into the needle tube seat 1 through the external tube 3. The medicine pushes the conical head 705 through the pressure, so that the conical head 705 is compressed by the compression spring 704, and the conical head 705 is compressed from The conical groove 702 is moved out to expose the opening of the conical groove 702, and the medicine passes through the inner cavity of the conical groove 702 and is discharged from the indwelling needle 803. When the external tube 3 stops delivering medicine, the medicine pressure disappears. At this time, through the elastic characteristics of the compression spring 704, the conical head 705 is squeezed into the inner cavity of the conical groove 702, blocking the opening of the conical groove 702 and preventing the liquid at the indwelling needle 803 from flowing back. In this way, the working principle of the utility model is completed.

[0044] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. An antibacterial indwelling needle, comprising a needle holder (1), characterized in that: The lower end surface of the needle tube seat (1) is embedded with a connector (2), the inner cavity of the connector (2) is sleeved with an external tube (3), the other end of the needle tube seat (1) is installed with an anti-reversal component (7), and the other end of the anti-reversal component (7) is installed with a needle component (8); The anti-reversal component (7) comprises an outer cylinder (701) fixed to one end of the needle tube seat (1), a conical groove (702) is fixed to one end of the inner cavity of the outer cylinder (701), a support frame (703) is fixed to the inner cavity of the outer cylinder (701), a compression spring (704) is fixed to one end of the support frame (703), and a conical head (705) is fixed to the extended end of the compression spring (704); The needle assembly (8) comprises a needle seat (801) sleeved on one end of the outer cylinder (701), a rubber ring (802) is melt-connected on the surface of the needle seat (801), and an indwelling needle (803) is installed on one end of the needle seat (801).

2. The antibacterial indwelling needle according to claim 1, characterized in that: One end of the tapered groove (702) is connected to the output end of the needle tube seat (1).

3. The antibacterial indwelling needle according to claim 1, characterized in that: The conical head (705) is sleeved with the inner cavity of the conical groove (702), and the conical head (705) forms an elastic telescopic structure with the support frame (703) through the compression spring (704).

4. The antibacterial indwelling needle according to claim 1, characterized in that: The rubber ring (802) is movably connected to the inner wall of the outer cylinder (701), and the needle seat (801) forms a snap-fit ​​structure between the rubber ring (802) and the outer cylinder (701).

5. The antibacterial indwelling needle according to claim 1, characterized in that: The output end of the connector (2) is connected to the inner cavity of the needle tube seat (1).

6. The antibacterial indwelling needle according to claim 1, characterized in that: A rubber plug (4) is inserted into the inner cavity of one end of the needle tube seat (1), an end cover (5) is fixed on the surface of the rubber plug (4), a connecting piece (6) is fixed on the upper end surface of the end cover (5), and the connecting piece (6) is movably connected to the upper end surface of the needle tube seat (1).

7. The antibacterial indwelling needle according to claim 6, characterized in that: The end cover (5) forms an assembleable structure with the needle tube seat (1) through the rubber plug (4).

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