A positive pressure connector with a rotatable retaining ring

Abstract

This application discloses a positive pressure connector with a rotatable retaining ring, comprising an inner liner, a three-way outer shell, an elastic capsule, and a rotatable retaining ring. The three-way outer shell includes a connecting outer shell and a connecting side tube connected thereto. The two ends of the connecting outer shell are an installation port and a liquid inlet, respectively. The inner liner includes a connecting post and a stop plate. The stop plate is connected to the outside of the connecting post and to the installation port of the connecting outer shell. One end of the connecting post extends into the connecting outer shell and connects to the elastic capsule. An infusion inner hole is formed along the length of the end of the connecting post away from the elastic capsule. A communicating inner hole is formed along the radial direction on the connecting post. The two ends of the communicating inner hole communicate with the infusion inner hole and the inner cavity of the connecting outer shell, respectively. The rotatable retaining ring includes a rotating tube and a rotating ring plate connected to one end of the rotating tube. The rotatable retaining ring is rotatably connected to the connecting post through the rotating ring plate. This application effectively ensures the sealing and reliability of the positive pressure connector after locking the indwelling needle, and reduces the possibility of connector damage.

Description

Technical Field

[0001] This application relates to the technical field of medical needleless infusion connectors, and in particular to a positive pressure connector with a rotatable retaining ring. Background Technology

[0002] Needleless infusion connectors are primarily used to connect indwelling needles to form a closed infusion pathway, ensuring that medication can be delivered from the infusion container to the patient or that blood or fluid can be drawn from the patient. At the end of the infusion, the indwelling needle catheter needs to be flushed and sealed with normal saline through the connector. Flushing removes any remaining medication from the catheter to prevent complications, while sealing prevents backflow and blockage of the catheter when the infusion device is removed.

[0003] A positive pressure connector is a needle-free infusion connector that enables the forward flow of fluid. When its rear end is locked to other infusion devices, the valve is in the open position; when disconnected, the valve is in the closed position. The instant the infusion device is removed from the positive pressure connector's rear end, the deformation of the elastic capsule creates positive pressure as the valve closes, causing the fluid in the infusion pathway to automatically flow towards the body. This avoids the risk of blockage caused by blood backflow when the infusion device is removed.

[0004] However, the positive pressure connectors currently on the market are all integrated with the locking connectors that connect to the indwelling needle. During the tightening and locking process, the point of force may shift to the positive pressure connector housing, resulting in excessive torque that could damage or even break the connection between the connector and the valve body. Utility Model Content

[0005] To ensure the sealing and reliability of the positive pressure connector after it is locked with the indwelling needle, and to reduce the possibility of connector damage, this application provides a positive pressure connector with a rotatable retaining ring.

[0006] The positive pressure connector with a rotatable retaining ring provided in this application adopts the following technical solution:

[0007] A positive pressure connector with a rotatable retaining ring includes an inner liner, a three-way outer shell, an elastic capsule, and a rotatable retaining ring. The three-way outer shell includes a connecting outer shell and a connecting side tube connected thereto. The two ends of the connecting outer shell are an installation port and a liquid inlet, respectively. The inner liner includes a connecting post and a stop plate. The stop plate is connected to the outside of the connecting post and to the installation port of the connecting outer shell. One end of the connecting post extends into the connecting outer shell and is connected to the elastic capsule. The end of the connecting post away from the elastic capsule has an infusion inner hole along its length. The connecting post has a communicating inner hole along its radius. The two ends of the communicating inner hole are respectively connected to the infusion inner hole and the inner cavity of the connecting outer shell. The rotatable retaining ring includes a rotating tube and a rotating ring plate connected to one end of the rotating tube. The rotatable retaining ring is rotatably connected to the connecting post through the rotating ring plate.

[0008] By adopting the above technical solution, the medication enters the annular cavity between the connecting shell and the elastic capsule through the inlet. The medication in the annular cavity is then transferred into the infusion inner hole through the connecting inner hole. Because the rotating retaining ring is rotatably connected to the connecting post, the possibility of structural breakage when the rotating retaining ring is screwed onto other external structures is reduced. Through the cooperation of the inner liner, the three-way outer shell, the elastic capsule, and the rotating retaining ring, the sealing and reliability of the positive pressure connector and the indwelling needle after locking connection are ensured, and the possibility of connector damage is reduced.

[0009] Optionally, the outer diameter of the rod segment of the connecting post located outside the connecting housing decreases in a direction away from the connecting housing.

[0010] By adopting the above technical solution, since the diameter of the connecting column gradually decreases along the direction away from the abutment plate, it is convenient for the operator to connect the infusion tube to the end of the connecting column that is provided with the infusion inner hole.

[0011] Optionally, a snap-fit ​​cone ring is provided on the outer ring wall of the connecting column, and a rotating elastic ring is provided on the inner ring wall of the rotating ring plate. The rotating elastic ring is rotatably connected to the connecting column, and the snap-fit ​​cone ring abuts against the side of the rotating elastic ring away from the abutment plate.

[0012] By adopting the above technical solution, the snap-fit ​​cone ring limits the rotation of the retaining ring, and the setting of the rotating elastic ring allows the retaining ring to rotate more smoothly on the connecting column.

[0013] Optionally, a sealing rubber block is provided at the end of the elastic capsule away from the connecting column. In its natural state, the sealing rubber block blocks the liquid inlet, and the end of the sealing rubber block is flush with the end of the liquid inlet.

[0014] By adopting the above technical solution, the sealing rubber block naturally blocks the liquid inlet of the connecting shell, preventing the liquid from flowing back through the liquid inlet.

[0015] Optionally, the sealing rubber block is provided with bending grooves.

[0016] By adopting the above technical solution, the setting of the bending groove facilitates the deformation of the sealing rubber block.

[0017] Optionally, the elastic capsule has a connection port at one end away from the sealing rubber block, and the connecting post is connected to a mounting ring on the rod segment in the connecting housing. The elastic capsule is sleeved on the outside of the connecting post through the connection port, and the end of the connection port abuts against the mounting ring.

[0018] By adopting the above technical solution, the elastic capsule is connected to the end of the connecting column through the connection port, and the installation ring facilitates precise positioning of the elastic capsule during installation.

[0019] Optionally, the connecting column has a venting groove along its length at one end inside the elastic capsule, and a venting hole communicating with the outside is provided on the inner bottom wall of the venting groove.

[0020] By adopting the above technical solution, the setting of the ventilation groove and ventilation hole facilitates the elastic capsule to exhaust air and inhale air to reset.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. Through the cooperation of the inner liner, the three-way outer shell, the elastic capsule, and the rotating retaining ring, the sealing and reliability of the positive pressure connector and the indwelling needle after locking connection are ensured, and the possibility of connector damage is reduced.

[0023] 2. The ventilation groove and ventilation hole facilitate the elastic capsule's exhaust and intake repositioning;

[0024] 3. The elastic capsule is connected to the end of the connecting column through the connection port, and the installation ring facilitates precise positioning of the elastic capsule during installation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram illustrating the structure of a positive pressure connector with a rotatable retaining ring, as described in this application.

[0026] Figure 2 This is a partial cross-sectional view used in the embodiments of this application to illustrate the internal structure of the tee housing.

[0027] Figure 3 This is a schematic diagram illustrating the inner liner structure in the embodiments of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Inner liner; 101. Connecting column; 102. Abutment plate; 103. Mounting ring; 104. Infusion inlet; 105. Connecting inlet; 2. Tee outer shell; 21. Connecting outer shell; 22. Connecting side tube; 23. Mounting port; 24. Inlet; 25. Connecting external thread; 3. Elastic capsule; 31. Connecting port; 32. Sealing rubber block; 33. Bending groove; 4. Rotating retaining ring; 41. Rotating tube; 42. Rotating ring plate; 43. Connecting internal thread; 44. Rotating elastic ring; 5. Snap-fit ​​cone ring; 6. Vent groove; 7. Vent hole. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-3 This application will be further described in detail below. An embodiment of this application provides a positive pressure connector with a rotatable retaining ring, which ensures the sealing and reliability of the positive pressure connector after it is locked with the indwelling needle, and reduces the possibility of connector damage.

[0030] Reference Figure 1 and Figure 2 A positive pressure connector with a rotatable retaining ring includes an inner liner 1, a three-way outer shell 2, an elastic capsule 3, and a rotatable retaining ring 4. The three-way outer shell 2 includes a connecting shell 21 and a connecting side pipe 22 inclinedly connected thereto. The two ends of the connecting shell 21 are an installation port 23 and a liquid inlet 24, respectively. The outer ring wall of the liquid inlet 24 is provided with a connecting external thread 25.

[0031] Reference Figure 1 and Figure 2 The inner liner 1 includes a connecting column 101, an abutment plate 102, and a mounting ring 103. The abutment plate 102 is coaxially connected to the outer ring wall of the middle section of the connecting column 101. The abutment plate 102 is coaxially ultrasonically welded to the mounting port 23 of the connecting shell 21. One end of the connecting column 101 extends into the inner cavity of the connecting shell 21. The mounting ring 103 is fixedly coaxially connected to the abutment plate 102 on one side of the connecting shell 21. An elastic capsule 3 is disposed in the connecting shell 21. One end of the elastic capsule 3 is provided with a connection port 31. The elastic capsule 3 is connected to the end of the connecting column 101 located in the connecting shell 21 through the connection port 31. The connection port 31 of the elastic capsule 3 abuts against the mounting ring 103. One end of the connecting post 101 located outside the connecting housing 21 has an infusion inner hole 104 along its axial direction. The end of the infusion inner hole 104 near the connecting housing 21 has several communicating inner holes 105 connected along the radial direction of the connecting post 101. The communicating inner holes 105 are connected to the inner cavity of the connecting housing 21.

[0032] Reference Figure 2The end of the elastic capsule 3 furthest from the connecting post 101 is connected to a sealing rubber block 32. In its natural state, the sealing rubber block 32 is located in the liquid inlet 24 and seals it. The sealing rubber block 32 has a bending groove 33, and one end of the sealing rubber block 32 is flush with the liquid inlet 24. The rod segment of the connecting post 101 located outside the connecting housing 21 gradually tapers away from the abutment plate 102. The rotating retaining ring 4 is rotatably mounted on the rod segment of the connecting post 101 located outside the connecting housing 21. The rotating retaining ring 4 includes a rotating tube 41 and a rotating ring plate 42. The rotating ring plate 42 is connected to one end of the rotating tube 41, and the inner ring wall of the rotating tube 41 is provided with a connecting internal thread 43 corresponding to the connecting external thread 25. The inner ring wall of the rotating ring plate 42 is provided with a rotating elastic ring 44, which is rotatably sleeved on the outside of the connecting post 101.

[0033] Reference Figure 2 and Figure 3 A snap-fit ​​cone ring 5 is provided on the outer ring wall of the connecting post 101. The snap-fit ​​cone ring 5 abuts against the side of the rotating elastic ring 44 away from the abutment plate 102, thereby limiting the rotation of the retaining ring 4. Two vent grooves 6 are formed radially at one end of the connecting post 101 located in the connecting housing 21. A vent hole 7 is provided at the bottom end of the vent groove 6, and one end of the vent hole 7 is connected to the outside.

[0034] Reference Figure 1 and Figure 2 When the positive pressure connector is locked to other infusion devices, the connecting post 101 of the positive pressure connector is connected and locked to the inner conical interface (not shown in the attached figure) of the other infusion device through the connecting internal thread 43. Because the rotating retaining ring 4 is rotatably connected to the connecting post 101, the possibility of the positive pressure connector breaking due to excessive force during tightening is reduced. When connecting the positive pressure connector to the infusion tubing, the infusion tubing is sleeved and connected to the end of the connecting post 101 with the infusion inner hole 104. Because the rod segment of the connecting post 101 located outside the connecting housing 21 gradually tapers away from the abutment plate 102, the installation of the infusion tubing is facilitated. The retaining cone ring 5 limits the rotation of the retaining ring 4, and the rotating elastic ring 44 facilitates smoother rotation of the retaining ring 4 on the connecting post 101.

[0035] Reference Figure 1 and Figure 2When the positive pressure connector is locked to other infusion devices, the outer conical interface of the other infusion device extends into the inner cavity of the connecting shell 21 of the previous positive pressure connector through the inlet 24 and locks with its external thread 25. The end of the outer conical interface of the other infusion device compresses the sealing rubber block 32, releasing the sealing rubber block 32 from blocking the inlet 24. The volume of the annular cavity between the elastic capsule 3 and the connecting shell 21 increases, and the medicine enters the annular cavity between the connecting shell 21 and the elastic capsule 3. The medicine in the annular cavity enters the infusion inner hole 104 through the communicating inner hole 105 for transportation. The setting of the bending groove 33 facilitates the deformation of the sealing rubber block 32 and the elastic capsule 3, facilitating the entry of medicine.

[0036] Reference Figure 1 and Figure 2 When the elastic capsule 3 is compressed and deformed, the gas inside the elastic capsule 3 is discharged through the venting groove 6 and the venting hole 7. When the elastic capsule 3 is compressed, the gas in the external environment enters the inner cavity of the elastic capsule 3 through the venting groove 6 and the venting hole 7, helping it to quickly return to its original shape before deformation. The mounting ring 103 limits the installation position of the elastic capsule 3, which helps to improve the installation accuracy of the elastic capsule 3.

[0037] Reference Figure 2 and Figure 3 After the positive pressure connector is used, the locking connection is rotated open, the elastic capsule 3 returns to its original position, and the medication in the connector housing is squeezed out through the infusion port 104, reducing the possibility of backflow of thrombi during needle removal. The sealing rubber block 32 then re-seals the inlet 24.

[0038] The implementation principle of the positive pressure connector with a rotatable retaining ring in this embodiment is as follows: When the positive pressure connector is locked to other infusion devices via the connecting post 101, the rotatable retaining ring 4 is rotatably connected to the connecting post 101, reducing the possibility of the positive pressure connector breaking due to excessive force during tightening. When other infusion devices are connected to the inlet 24 of the positive pressure connector, the outer conical interface of the other infusion device extends into the inner cavity of the connecting shell 21 of the previous positive pressure connector through the inlet 24, and the medication enters the annular cavity between the connecting shell 21 and the elastic capsule 3. The medication in the annular cavity is transported through the communicating inner hole 105 into the infusion inner hole 104.

[0039] 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 positive pressure connector with a rotatable retaining ring, characterized in that: The device includes an inner liner (1), a three-way outer shell (2), an elastic capsule (3), and a rotating retaining ring (4). The three-way outer shell (2) includes a connecting shell (21) and a connecting side tube (22) connected to it. The two ends of the connecting shell (21) are an installation port (23) and a liquid inlet (24), respectively. The inner liner (1) includes a connecting post (101) and an abutment plate (102). The abutment plate (102) is connected to the outside of the connecting post (101) and is connected to the installation port (23) of the connecting shell (21). One end of the connecting post (101) extends into the connecting shell. The connecting post (101) is located in the shell (21) and connected to the elastic capsule (3). The end of the connecting post (101) away from the elastic capsule (3) is provided with an infusion inner hole (104) along the length direction. The connecting post (101) is provided with a communicating inner hole (105) along the radial direction. The two ends of the communicating inner hole (105) are respectively connected to the infusion inner hole (104) and the inner cavity of the connecting shell (21). The rotating retainer (4) includes a rotating tube (41) and a rotating ring plate (42) connected to one end of it. The rotating retainer (4) is rotatably connected to the connecting post (101) through the rotating ring plate (42).

2. A positive pressure connector with a rotatable retaining ring according to claim 1, characterized in that: The outer diameter of the connecting column (101) located outside the connecting housing (21) decreases in a direction away from the connecting housing (21).

3. A positive pressure connector with a rotatable retaining ring according to claim 1, characterized in that: A snap-fit ​​cone ring (5) is provided on the outer ring wall of the connecting column (101), and a rotating elastic ring (44) is provided on the inner ring wall of the rotating ring plate (42). The rotating elastic ring (44) is rotatably connected to the connecting column (101), and the snap-fit ​​cone ring (5) abuts against the side of the rotating elastic ring (44) away from the abutment plate (102).

4. A positive pressure connector with a rotatable retaining ring according to claim 1, characterized in that: The elastic capsule (3) is provided with a sealing rubber block (32) at one end away from the connecting column (101). In its natural state, the sealing rubber block (32) blocks the liquid inlet (24), and the end of the sealing rubber block (32) is flush with the end of the liquid inlet (24).

5. A positive pressure connector with a rotatable retaining ring according to claim 4, characterized in that: The sealing rubber block (32) has a bending groove (33).

6. A positive pressure connector with a rotatable retaining ring according to claim 5, characterized in that: The elastic capsule (3) has a connection port (31) at one end away from the sealing rubber block (32). The connecting post (101) is connected to the rod segment in the connecting shell (21) with an installation ring (103). The elastic capsule (3) is sleeved on the outside of the connecting post (101) through the connection port (31), and the end of the connection port (31) abuts against the installation ring (103).

7. A positive pressure connector with a rotatable retaining ring according to claim 6, characterized in that: The connecting column (101) has a ventilation groove (6) along its length at one end inside the elastic capsule (3), and a ventilation hole (7) communicating with the outside is provided on the inner bottom wall of the ventilation groove (6).

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