A needle-free closed bidirectional positive pressure infusion connector

Abstract

The present invention discloses a needle-free closed bidirectional positive pressure infusion connector, including a base, a circular opening No. 1 is processed on the upper surface of the base, a circular groove is processed on the upper surface of the base and outside the circular opening No. 1, a circular notch is processed at the edge of the upper surface of the base, a piston is arranged above the base, the outer side of the lower surface of the piston is located in the circular groove, the center of the lower surface of the piston is located in the circular opening No. 1, a fork seat is arranged above the piston, a circular groove is processed on the lower surface of the fork seat, a No. 2 circular opening is processed at the center of the upper surface of the fork seat, and the outer side of the upper surface of the piston is located in the circular groove. The beneficial effect of the present invention is that an innovative design is carried out in terms of structure and construction, achieving safe, positive pressure, needle-free infusion in a true sense, ensuring that there is no leakage and no dripping, realizing a safe needle-free connection that can be repeatedly plugged and unplugged, and greatly reducing the production cost, and having broad development prospects at home and abroad.

Description

Technical Field

[0001] The invention relates to the field of needle-free sealed bidirectional positive pressure infusion connector, in particular to a needle-free sealed bidirectional positive pressure infusion connector. Background Art

[0002] It can be connected to syringes, infusion sets and blood transfusion sets, and is especially used for patients who need intravenous infusion, such as children, critically ill patients, chemotherapy patients, patients who are continuing to be rescued, and patients with water and electrolyte imbalance.

[0003] Currently, in the existing technology, unsafe handling of hazardous drugs for many forms of cancer has been recognized since the 1970s as a significant health hazard to those who dispense medications. There are reports that demonstrate the toxicity of hazardous drugs and the dangers of long-term exposure can cause hair loss, rashes, infertility, miscarriage, birth defects and even leukemia or other forms of cancer in healthcare workers. In addition, studies have shown that healthcare workers and pharmaceutical factory workers may be exposed to the dangers of these drugs throughout the entire cycle, from manufacturing to distribution, and waste disposal in clinical or home care settings. Healthcare workers handling these drugs may inhale aerosols or dusts generated during drug preparation and nursing administration, or come into direct contact with the skin during accidental needle sticks, spills or spill cleanup. Traditional needle and syringe-based medication dispensing in hospital wards poses significant risks to the safety of clinicians and patients. For example, chemotherapy drugs, there are a lot of documents proving that many drugs and their vapors have great biological toxicity. All of this poses a challenge to clinical practice. The positive pressure needle-free infusion product produced by ICU Medical Company in the United States, taking the CLC2000 as an example, adopts three ends of T-shaped structure, namely liquid input end (needle-free plug-in mode, external spiral interface); liquid output end (internal spiral interface); piston exhaust end. When the infusion connector is removed after use, a positive pressure is generated in the connector, forcing the liquid to quickly flush into the vein, so that the venous blood leaves the puncture needle, thereby avoiding blood coagulation in the needle tube, keeping the indwelling needle unobstructed, and no anticoagulant is needed to seal the tube. Since the product entered China in 2002, it has been widely praised in clinical practice, widely used in provincial hospitals, and is even more needed by patients with long-term needle infusion and infusion. However, due to its high price, the patients who can use it are limited.

[0004] In order to solve the above problems, a specially designed mechanical valve technology is used to manufacture closed pipelines to protect medical staff and patients, including pinhole-free Luer lock connections and connections for needle-free syringes. When the bidirectional positive pressure connectors researched, developed, and produced by Haosfang are paired with other needle-free connectors, leak-free, drip-free connections and disconnections are provided. The bidirectional positive pressure connector can mechanically prohibit the transfer and escape of environmental pollutants. The drug dispensing personnel can connect to the end of the needle-free syringe or needle-free infusion tube, and automatically self-seal whenever the connection is disconnected to protect the sealing of the liquid container. The material does not contain latex and DEHP, and the bidirectional positive pressure connector with no dead space and valve sealing structure can be widely used in clinical departments such as ICU, CCU, infectious disease wards, operating rooms, etc., and greatly reduces the production cost. Therefore, it is necessary to design a needle-free closed bidirectional positive pressure infusion connector. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems and to design a needle-free closed bidirectional positive pressure infusion connector.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present invention is a needle-free closed bidirectional positive pressure infusion connector, comprising a base, a No. 1 circular opening is processed on the upper surface of the base, a circular groove is processed on the upper surface of the base and located outside the No. 1 circular opening, a circular groove is processed on the edge of the upper surface of the base, a piston is arranged above the base, the outer side of the lower surface of the piston is located in the circular groove, the oblique ball at the center of the lower surface of the piston is located in the No. 1 circular opening, a fork seat is arranged above the piston, a circular groove is processed on the lower surface of the fork seat, a No. 2 circular opening is processed at the center of the upper surface of the fork seat, the outer side of the upper surface of the piston is located in the circular groove, the center of the upper surface of the piston extends from the No. 2 circular opening, a shell is set in the circular groove and located outside the piston, a No. 3 circular opening is processed at the center of the upper surface of the shell, the inner upper surface of the shell matches the outer side of the upper surface of the fork seat, the upper surface of the piston extends into the No. 3 circular opening, the left and right sides of the inner upper surface of the shell are processed with arc openings, and the upper end of the outer surface of the shell is set with a cover.

[0007] A No. 1 external thread is arranged at the lower end of the outer surface of the base.

[0008] The outer surface of the piston is processed with a No. 2 external thread, and the inner surface of the piston is processed with a No. 1 internal thread.

[0009] A No. 2 internal thread is arranged on the upper end of the inner surface of the shell.

[0010] The outer surface of the shell is processed with a plurality of friction lines.

[0011] The inner platform of the piston is provided with four annular through holes.

[0012] The bottom edge of the piston is a spherical inclined surface.

[0013] An inclined boss is arranged on the upper end of the inner surface of the base.

[0014] A needle-free, sealed, bidirectional positive-pressure infusion connector manufactured using the technical solution of the present invention has been innovatively designed in terms of structure and construction, achieving truly safe, positive-pressure, needle-free infusion, ensuring no leakage or dripping, and realizing a safe needle-free connection that can be repeatedly plugged and unplugged, and greatly reducing production costs, with broad development prospects at home and abroad. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a needle-free closed bidirectional positive pressure infusion connector according to the present invention;

[0016] Figure 2 It is an exploded view of a needle-free closed bidirectional positive pressure infusion connector according to the present invention;

[0017] In the figure, 1, base; 2, piston; 3, fork seat; 4, shell; 5, cover; 6, No. 1 external thread; 7, No. 2 external thread; 8, No. 1 internal thread; 9, No. 2 internal thread; 10, friction pattern; 11,

[0018] Annular through hole; 12. Spherical inclined surface; 13. Inclined surface boss. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings. Figure 1-2As shown, a needle-free closed bidirectional positive pressure infusion connector comprises a base 1, wherein the upper surface of the base 1 is processed with a No. 1 circular opening, the upper surface of the base 1 and the outer side of the No. 1 circular opening are processed with a circular groove, the upper surface edge of the base 1 is processed with a circular groove, a piston 2 is arranged above the base 1, the outer side of the lower surface of the piston 2 is located in the circular groove, the center of the lower surface of the piston 2 is located in the No. 1 circular opening, a fork seat 3 is arranged above the piston 2, the lower surface of the fork seat 3 is processed with a circular groove, the center of the upper surface of the fork seat 3 is processed with a No. 2 circular opening, the outer side of the upper surface of the piston 2 is located in the circular groove, the center of the upper surface of the piston 2 extends from the No. 2 circular opening, and a shell is sleeved in the circular groove and on the outer side of the piston 2 4. A No. 3 circular opening is processed at the center of the upper surface of the shell 4. The inner upper surface of the shell 4 matches the outer side of the upper surface of the fork seat 3. The upper surface of the piston 2 extends into the No. 3 circular opening. The left and right sides of the inner upper surface of the shell 4 are processed with arc openings. A cover 5 is mounted on the upper end of the outer surface of the shell 4; a No. 1 external thread 6 is provided at the lower end of the outer surface of the base 1; a No. 2 external thread 7 is processed on the outer surface of the piston 2, and a No. 1 internal thread 8 is processed on the inner surface of the piston 2; a No. 2 internal thread 9 is provided on the upper end of the inner surface of the shell 4; a number of friction lines 10 are processed on the outer surface of the shell 4; four annular through holes 11 are provided on the inner platform of the piston; the bottom edge of the piston is a spherical inclined surface 12; and a bevel boss 13 is provided on the upper end of the inner surface of the base.

[0020] The characteristic of this embodiment is that the connector should have a bidirectional positive pressure function. The bidirectional positive pressure connector should provide leak-free and drip-free connection and disconnection when paired with other needle-free connectors. And whenever the connection is disconnected, an instantaneous positive pressure is generated, which can automatically self-seal, mechanically prohibiting the transfer and escape of environmental pollutants to protect the sealing of the liquid container. The processing technology of the needle-free sealed positive pressure infusion connector cannot be too complicated, ensuring that the cost of the entire needle-free sealed positive pressure infusion connector is much lower than the price of similar imported products. Innovative designs have been made in terms of structure and construction to achieve truly safe, positive pressure, and needle-free infusion, ensuring that there is no leakage or dripping, and realizing a safe needle-free connection that can be repeatedly plugged and unplugged, and greatly reducing production costs. It has broad development prospects at home and abroad.

[0021] In this embodiment, the needle-free bidirectional positive pressure sealed infusion connector is composed of a fork seat 3, a piston 2, a shell 4, a base 1, a cover 5 and other components, wherein the liquid channel in the connector is placed in the inner holes of the piston 2 and the shell 4. When infusion is required, the head of the needle-free connector is screwed in, and the fork seat 3 of the upper section of the sealed infusion connector moves downward and opens the seal between the spherical inclined surface of the piston 2 and the inclined surface boss of the base 1; and a 6:100 plug (syringe or infusion set) is inserted into the No. 1 circular port of the connector base 1, so that the liquid channel in the connector is connected with the liquid channel in the 6:100 plug (syringe or infusion set). When the infusion is completed, the needle-free connector is screwed out, and the piston 2 moves upward, so that the piston 2 and the base 1 are sealed again. A bidirectional positive pressure infusion connection system of the liquid input end (needle-free plug-in mode, external spiral interface), the liquid output end (internal spiral interface), and the exhaust end of the piston 1 is realized. A safe needle-free connection that can be repeatedly plugged in and out is realized. When the infusion is completed, the bidirectional positive pressure needle-free connector is unscrewed, and the fork seat 3 moves upward to close the channel between the piston 2 and the base 1, realizing a connection and disconnection that can be repeatedly plugged in and out. Structurally, it is ensured that the central column of the shell 4 and the piston hole always form a closed loop to ensure that there is no leakage or dripping. The needle-free sealed bidirectional positive pressure infusion connector adopts a closed passage for infusion. The liquid channel is completely closed and hidden by the piston. When not connected, the upper end face of the piston 2 is flush with the upper end face of the shell 4, and the piston 2 and the shell 4 are sealed, which ensures the closed and sterile state of the connector liquid channel, reducing the potential danger of microbial invasion and air inhalation.

[0022] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A needle-free closed bidirectional positive pressure infusion connector, comprising a base (1), characterized in that: The upper surface of the base (1) is processed with a No. 1 circular opening, the upper surface of the base (1) is processed with a circular groove outside the No. 1 circular opening, the upper surface edge of the base (1) is processed with a circular groove, a piston (2) is arranged above the base (1), the outer side of the lower surface of the piston (2) is located in the circular groove, the center of the lower surface of the piston (2) is located in the No. 1 circular opening, a fork seat (3) is arranged above the piston (2), the lower surface of the fork seat (3) is processed with a circular groove, and the center of the upper surface of the fork seat (3) is processed with a No. 2 circular groove. The outer side of the upper surface of the piston (2) is located in the circular groove, the center of the upper surface of the piston (2) extends out from the second circular opening, the outer side of the piston (2) is provided with a housing (4) in the circular groove and located on the outer side of the piston (2), the center of the upper surface of the housing (4) is processed with a third circular opening, the inner upper surface of the housing (4) matches the outer side of the upper surface of the fork seat (3), the upper surface of the piston (2) extends into the third circular opening, the left and right sides of the inner upper surface of the housing (4) are processed with arc-shaped openings, and the upper end of the outer surface of the housing (4) is provided with a cover (5); A No. 1 external thread (6) is provided at the lower end of the outer surface of the base (1); The outer surface of the piston (2) is processed with a No. 2 external thread (7), and the inner surface of the piston (2) is processed with a No. 1 internal thread (8).

2. The needle-free closed bidirectional positive pressure infusion connector according to claim 1, characterized in that: A No. 2 internal thread (9) is provided at the upper end of the inner surface of the outer shell (4).

3. The needle-free closed bidirectional positive pressure infusion connector according to claim 1, characterized in that: The outer surface of the housing (4) is processed with a plurality of friction lines (10).

4. The needle-free closed bidirectional positive pressure infusion connector according to claim 1, characterized in that: The inner platform of the piston (2) is provided with four annular through holes (11).

5. The needle-free closed bidirectional positive pressure infusion connector according to claim 1, characterized in that: The bottom edge of the piston (2) is a spherical inclined surface (12).

6. The needle-free closed bidirectional positive pressure infusion connector according to claim 1, characterized in that: An inclined boss (13) is provided on the upper end of the inner surface of the base (1).

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