A glue-free indwelling needle catheter seat

Abstract

The application relates to a glue-free retention needle catheter seat, which comprises a catheter seat and an isolation plug, an inner wall of the catheter seat is coaxially fixedly connected with a sealing ring, and an outer wall of the isolation plug is coaxially provided with a sealing groove used for embedding the sealing ring. The sealing ring is matched with the sealing groove, the assembly of the isolation plug and the catheter seat is completed, glue is not needed, the processing efficiency is improved, and the equipment cost during processing is reduced.

Description

Technical Field

[0001] This application relates to the field of medical devices, and in particular to a glue-free indwelling needle catheter holder. Background Technology

[0002] An indwelling catheter consists of a flexible outer cannula that can be left in a blood vessel, and a stainless steel puncture needle. During use, the catheter and needle are inserted together into the blood vessel. Once the catheter is fully inserted, the needle is withdrawn, leaving only the flexible catheter in place for intravenous infusion. The use of indwelling catheters reduces the pain caused by repeated venipunctures for patients, reduces the workload of nurses, and minimizes patient discomfort.

[0003] Indwelling intravenous catheters mainly consist of a catheter assembly and a needle assembly. The catheter assembly consists of a transparent three-way stopcock and a soft outer sheath, while the needle assembly consists of a puncture needle and a needle holder.

[0004] In the routine processing of intravenous catheters, a white isolation plug is inserted into a transparent three-way tube using a pressing device. The three-way tube has an injection hole, and the white isolation plug has an annular groove. After the pressing device presses the annular groove of the white isolation plug into the position of the injection hole, it is transported to the dispensing station. The dispensing device injects UV glue into the annular groove through the injection hole. The UV glue is cured by ultraviolet light, fixing the white isolation plug in the transparent three-way tube.

[0005] Fixing the white isolation plug into the transparent tee tube requires processes such as pressing, bonding, and curing. The injection hole itself has a small diameter, which places high demands on the positioning accuracy of the indwelling needle in the dispensing equipment and the accuracy of the dispensing volume. This results in high processing costs and low processing efficiency. Utility Model Content

[0006] To improve processing efficiency, this application provides a glue-free indwelling needle catheter seat.

[0007] The adhesive-free indwelling needle catheter holder provided in this application adopts the following technical solution: A glue-free indwelling needle catheter seat includes a catheter seat and an isolation plug. The inner wall of the catheter seat is coaxially fixedly connected with a sealing ring, and the outer wall of the isolation plug is coaxially provided with a sealing groove for the sealing ring to be embedded.

[0008] By adopting the above technical solution, the sealing ring and the sealing groove cooperate to complete the assembly of the isolation plug and the conduit seat, eliminating the need for glue, improving processing efficiency and reducing equipment costs during processing.

[0009] Preferably, the catheter hub includes an installation tube and an infusion connector. The installation tube is coaxially provided with an installation cavity, and a sealing ring is coaxially fixedly connected to the inner wall of the installation cavity. The two ends of the installation tube are respectively coaxially provided with an installation port and an outlet port. The outer wall of the installation tube is provided with an inlet port, which is located between the isolation plug and the outlet port and communicates with the installation cavity. The infusion connector is fixedly connected to the outer wall of the installation tube, and the infusion connector is coaxially provided with an infusion port, which communicates with the inlet port.

[0010] By adopting the above technical solution, the isolation plug is installed in the installation cavity to block the liquid. The medicine enters the installation cavity from the infusion port through the inlet port and then exits from the outlet port, which is convenient for use.

[0011] Preferably, the diameter of the mounting port is larger than the diameter of the liquid outlet, the mounting port is used for the passage of the isolation plug, and the liquid outlet is used for the passage of the needle tube.

[0012] By adopting the above technical solution, it is easier to install the isolation plug, improve the assembly efficiency of the isolation plug and the conduit seat, and improve the processing efficiency.

[0013] Preferably, both ends of the isolation plug are chamfered.

[0014] By adopting the above technical solution, the chamfer facilitates the insertion of the isolation plug into the installation port, reduces the resistance to the insertion of the isolation plug, improves the installation efficiency of the isolation plug, and improves the processing efficiency.

[0015] Preferably, the diameter of the mounting opening increases as it moves away from the mounting cavity.

[0016] By adopting the above technical solution, the installation of the isolation plug is guided, which facilitates the installation of the isolation plug and improves processing efficiency.

[0017] Preferably, the end of the sealing ring facing the mounting opening is provided with a guide surface coaxially, and the diameter of the guide surface increases as it approaches the mounting opening.

[0018] By adopting the above technical solution, the guide surface guides the installation of the isolation plug, which facilitates the installation of the isolation plug and improves processing efficiency.

[0019] Preferably, the diameter of the mounting cavity increases with distance from the liquid outlet.

[0020] By adopting the above technical solution, it is easier to install the isolation plug and improve processing efficiency.

[0021] Preferably, a limiting ring is coaxially fixedly connected to the inner wall of the mounting cavity, and the limiting ring is disposed between the isolation plug and the mounting port.

[0022] By adopting the above technical solution, the limiting ring limits the isolation plug, reducing the probability of the isolation plug detaching from the catheter seat and improving the stability of the isolation plug.

[0023] Preferably, the inner wall of the mounting cavity has a stepped surface at the end facing the sealing ring, and the stepped surface is located between the liquid inlet and the isolation plug.

[0024] By adopting the above technical solution, the stepped surface limits the isolation plug, reducing the probability of misalignment between the isolation plug and the sealing ring and improving processing efficiency.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The sealing ring and sealing groove cooperate to complete the assembly of the isolation plug and the conduit seat, eliminating the need for glue, improving processing efficiency and reducing equipment costs during processing; 2. The chamfer facilitates the insertion of the isolation plug into the installation port, reduces the resistance to insertion, improves the installation efficiency of the isolation plug, and increases processing efficiency; 3. The guide surface guides the installation of the isolation plug, making the installation of the isolation plug easier and improving processing efficiency. Attached Figure Description

[0026] Figure 1 This is an exploded view of a glue-free indwelling needle catheter seat.

[0027] Figure 2 This is a cross-sectional view of the conduit seat.

[0028] Figure 3 This is a cross-sectional view of a glue-free indwelling needle catheter seat.

[0029] Explanation of reference numerals in the attached drawings: 1. Guide tube seat; 11. Installation tube; 111. Installation cavity; 112. Installation port; 113. Outlet; 114. Inlet; 115. Sealing ring; 1151. Guide surface; 1152. Abutment surface; 116. Limiting ring; 1161. Inclined surface; 117. Stepped surface; 12. Infusion tube; 121. Infusion port; 2. Isolation plug; 21. Sealing groove; 22. Chamfer. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0031] This application discloses a glue-free indwelling needle catheter seat.

[0032] Reference Figure 1 A non-adhesive-free indwelling needle catheter seat includes a catheter seat 1 and an isolation plug 2.

[0033] Reference Figure 2The catheter hub 1 includes an installation tube 11 and an infusion connector 12. The installation tube 11 is coaxially provided with an installation cavity 111. The two ends of the installation tube 11 are respectively coaxially provided with an installation port 112 and an outlet port 113, which are both connected to the installation cavity 111. The outer wall of the installation tube 11 is provided with an inlet port 114, which is connected to the installation cavity 111. The infusion connector 12 is fixedly connected to the outer wall of the installation tube 11. The infusion connector 12 is coaxially provided with an infusion port 121, which is connected to the inlet port 114. The angle between the axis of the infusion connector 12 and the axis of the installation tube 11 is set to an acute angle, and the infusion port 121 faces the outlet port 113.

[0034] Reference Figure 3 The diameter of the mounting port 112 is larger than the diameter of the outlet port 113. The mounting port 112 is used for the isolation plug 2 to pass through, and the outlet port 113 is used for the needle to pass through. The diameter of the mounting cavity 111 increases as it moves away from the outlet port 113, and the diameter of the mounting port 112 increases as it moves away from the mounting cavity 111, which facilitates the installation of the isolation plug 2.

[0035] Reference Figure 2 and Figure 3 A sealing ring 115 is coaxially fixedly connected to the inner wall of the mounting cavity 111. The sealing ring 115 is located between the liquid inlet 114 and the mounting port 112. A guide surface 1151 is coaxially provided at the end of the sealing ring 115 facing the mounting port 112. The diameter of the guide surface 1151 increases as it approaches the mounting port 112. An abutment surface 1152 is coaxially provided at the end of the sealing ring 115 facing the liquid outlet 113. The diameter of the abutment surface 1152 increases as it approaches the liquid outlet 113. The angle between the abutment surface 1152 and the outer wall of the sealing ring 115 is greater than the angle between the guide surface 1151 and the outer wall of the sealing ring 115. A sealing groove 21 is coaxially provided on the outer wall of the isolation plug 2 for the sealing ring 115 to be embedded in. Both ends of the isolation plug 2 are chamfered 22. The isolation plug 2 is located between the liquid inlet 114 and the mounting port 112.

[0036] A limiting ring 116 is coaxially fixedly connected to the inner wall of the mounting cavity 111. The limiting ring 116 is located between the isolation plug 2 and the mounting port 112. Both ends of the limiting ring 116 are provided with inclined surfaces 1161, which are used for the isolation plug 2 to abut against. The inner wall of the mounting cavity 111 has a stepped surface 117 at the end facing the sealing ring 115. The stepped surface 117 is located between the liquid inlet 114 and the isolation plug 2.

[0037] The implementation principle of the adhesive-free indwelling needle catheter seat in this application embodiment is as follows: the isolation plug 2 is inserted into the mounting cavity 111 from the mounting port 112, and the isolation plug 2 is further inserted so that the sealing ring 115 is embedded in the sealing groove 21, thereby completing the assembly of the isolation plug 2 and the catheter seat 1 and fixing the isolation plug 2 in the interval between the limiting ring 116 and the stepped surface 117.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A glue-free retention needle catheter hub, characterized in that: It includes a conduit seat (1) and an isolation plug (2). The inner wall of the conduit seat (1) is coaxially fixedly connected with a sealing ring (115), and the outer wall of the isolation plug (2) is coaxially provided with a sealing groove (21). The sealing groove (21) is used for the sealing ring (115) to be embedded.

2. The adhesive-free indwelling needle catheter holder according to claim 1, characterized in that: The catheter seat (1) includes an installation tube (11) and an infusion connector (12). The installation tube (11) is coaxially provided with an installation cavity (111). A sealing ring (115) is coaxially fixedly connected to the inner wall of the installation cavity (111). The two ends of the installation tube (11) are respectively coaxially provided with an installation port (112) and an outlet port (113). The outer wall of the installation tube (11) is provided with an inlet port (114). The inlet port (114) is located between the isolation plug (2) and the outlet port (113). The inlet port (114) is connected to the installation cavity (111). The infusion connector (12) is fixedly connected to the outer wall of the installation tube (11). The infusion connector (12) is coaxially provided with an infusion port (121). The infusion port (121) is connected to the inlet port (114).

3. The adhesive-free indwelling needle catheter hub of claim 2, wherein: The diameter of the mounting port (112) is larger than the diameter of the outlet port (113). The mounting port (112) is used for the isolation plug (2) to pass through, and the outlet port (113) is used for the needle to pass through.

4. The adhesive-free indwelling needle catheter hub of claim 3, wherein: Both ends of the isolation plug (2) are chamfered (22).

5. The adhesive-free indwelling needle catheter hub of claim 3, wherein: The diameter of the mounting port (112) increases as it moves away from the mounting cavity (111).

6. The adhesive-free indwelling needle catheter hub of claim 3, wherein: The sealing ring (115) has a guide surface (1151) coaxially provided at one end facing the mounting port (112), and the diameter of the guide surface (1151) increases as it approaches the mounting port (112).

7. The adhesive-free indwelling needle catheter hub of claim 3, wherein: The diameter of the mounting cavity (111) increases as it moves away from the liquid outlet (113).

8. The adhesive-free indwelling needle catheter hub of claim 7, wherein: A limiting ring (116) is coaxially fixedly connected to the inner wall of the installed cavity (111), and the limiting ring (116) is located between the isolation plug (2) and the installation port (112).

9. The adhesive-free indwelling needle catheter seat according to claim 7, characterized in that: The inner wall of the mounting cavity (111) is provided with a stepped surface (117) at one end facing the sealing ring (115), and the stepped surface (117) is located between the liquid inlet (114) and the isolation plug (2).

Images