Zero-residual positive pressure needleless medicine adding connector

Abstract

The application discloses a zero-residual positive-pressure needle-free medicine adding connector, which comprises a screw base connector, a sealing plug and a shell, the screw base connector comprises a conical pipe, a positioning column and a luer connector which are sequentially connected from top to bottom, an annular column groove is formed in the circumferential direction of the outer wall surface of the conical pipe; a conical pipe mounting groove is formed in the bottom end of the sealing plug upwards, a sealing plug inner ring which is matched with the column groove is arranged on the inner wall surface of the conical pipe mounting groove; the conical pipe of the screw base connector is inserted into the conical pipe mounting groove of the sealing plug, and the sealing plug inner ring is clamped in the column groove. The zero-residual positive-pressure needle-free medicine adding connector has the advantages of simple structure, three combined fittings, realization of positive-pressure infusion, no residual medicine liquid in the dredging process, small residual amount and waste avoidance.

Description

Technical Field

[0001] The invention relates to a zero-residue positive-pressure needle-free drug-dosing connector, belonging to the field of medical devices. Background Art

[0002] With the rapid development of intravenous infusion, needle-free sealed infusion technology has also been widely used in clinical practice. Needle-free infusion refers to a device that can repeatedly deliver or withdraw fluids into an infusion line without the need for puncture. It uses a needle-free, closed-loop dosing connector to provide a flow channel and injection port for infusion. Currently, most needle-free, closed-loop dosing connectors are complex in structure and cumbersome to operate. They also lack airtightness and cannot eliminate residual liquid in the connector, exponentially increasing the risk of infection for patients during infusion.

[0003] At the same time, the residual gap in the needle-free connector causes more or less residual medicine to remain in the needle-free dosing connector during infusion, causing the reused Chinese medicine to be mixed with the residual medicine from the previous round, thereby affecting the safety of this medicine delivery and affecting subsequent reuse. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a zero-residue positive pressure needle-free dosing connector with a simple structure. The combination of three accessories can achieve positive pressure infusion, and the residual medicine liquid cannot be left in it during the dredging process, the residual amount is small, and waste is avoided.

[0005] The technical solution to achieve the above purpose is: a zero-residue positive pressure needle-free dosing connector, comprising a screw base connector, a sealing plug and a shell, wherein:

[0006] The screw-type base connector includes a tapered tube, a positioning post, and a Luer connector connected in sequence from top to bottom. An annular post groove is formed on the outer wall of the tapered tube along its circumference, and the post groove divides the tapered tube into upper and lower parts. The positioning post and the Luer connector are respectively provided with through holes extending vertically therethrough in the middle, and the through holes of the tapered tube, the positioning post, and the Luer connector are connected in sequence from top to bottom to form a straight infusion channel.

[0007] The bottom end of the sealing plug is provided with a tapered tube mounting groove upwardly, and an inner clamping ring of the sealing plug is provided on the inner wall surface of the tapered tube mounting groove and is adapted to the column groove. The inner clamping ring of the sealing plug divides the tapered tube mounting groove into an upper part and a lower part. The upper part of the tapered tube mounting groove is in a tapered shape adapted to the upper part of the tapered tube; the top end of the sealing plug is provided with a sealing seam;

[0008] The sealing plug is arranged in the shell, and the top surface of the sealing plug is flush with the top surface of the shell;

[0009] The tapered tube of the screw base connector is inserted into the tapered tube mounting groove of the sealing plug, and the inner clamping ring of the sealing plug is clamped into the column groove;

[0010] The positioning post of the screw base connector is located in the housing, and the bottom end of the sealing plug is arranged on the top end of the positioning post;

[0011] The bottom end of the housing is located at the top end of the Luer connector.

[0012] The above-mentioned zero-residual positive pressure needle-free dosing connector, wherein an annular snap-on boss is provided on the outer wall surface of the positioning column along its circumferential direction, and a snap-on groove adapted to the snap-on boss is provided on the inner wall surface of the shell, and the snap-on boss is snapped into the snap-on groove.

[0013] In the above-mentioned zero-residue positive-pressure needle-free dosing connector, the conical tube is located directly below the sealing seam, and the sealing seam is closed in a natural state.

[0014] In the above-mentioned zero-residual positive-pressure needle-free drug-adding connector, the column groove is located below the top opening of the straight-through infusion channel.

[0015] In the above-mentioned zero-residue positive-pressure needle-free dosing connector, the sealing plug is made of elastic silicone.

[0016] The zero-residue positive-pressure needle-free dosing connector of the present invention has a simple structure. The combination of three accessories can achieve positive-pressure infusion, and the residual drug liquid cannot be left therein during the dredging process, the residual amount is small, and waste is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the zero-residual positive pressure needle-free dosing connector of the present invention;

[0018] Figure 2 This is the structural diagram of the screw base connector;

[0019] Figure 3 It is the structural diagram of the sealing plug;

[0020] Figure 4 Schematic diagram of the structure of the shell;

[0021] Figure 5 This is a schematic diagram of the connection between the screw base connector and the sealing plug;

[0022] Figure 6 Schematic diagram of the structure of the cavity volume in the initial state / recovery state;

[0023] Figure 7 Schematic diagram of the structure of the cavity volume in the compressed state. DETAILED DESCRIPTION

[0024] In order for the person skilled in the art to better understand the technical solutions of the present application, the specific embodiments thereof will be described in detail below with reference to the drawings:

[0025] Please refer to Figure 1 , the best embodiment of the present application, a zero-residual positive pressure needle-free medicine adding connector, comprising a screw base connector 1, a sealing plug 2 and a shell 3.

[0026] Please refer to Figure 2 , the screw base connector 1 comprises a conical tube 11, a positioning column 12 and a luer connector 13 connected in sequence from top to bottom, an annular column groove 1a is formed on the outer wall surface of the conical tube 11 along its circumferential direction, which divides the conical tube 11 into upper and lower parts; the middle part of the positioning column 12 and the luer connector 13 are respectively provided with through holes penetrating up and down, and the through holes of the conical tube 11, the positioning column 12 and the luer connector 13 are sequentially communicated from top to bottom to form a straight-through infusion flow channel 14; an annular buckle boss 15 is arranged on the outer wall surface of the positioning column 12 along its circumferential direction. The column groove 1a is located below the top opening of the straight-through infusion flow channel 14.

[0027] Please refer to Figure 3 , the bottom end of the sealing plug 2 is upwardly provided with a conical tube mounting groove 21, and an inner sealing plug ring 2a matched with the column groove 1a is arranged on the inner wall surface of the conical tube mounting groove 21, which divides the conical tube mounting groove 21 into upper and lower parts, and the upper part 2b of the conical tube mounting groove 21 is in a conical shape matched with the upper part of the conical tube 11; the top end of the sealing plug 2 is provided with a sealing seam 22 which is closed in a natural state.

[0028] Please refer to Figure 4 , the inner wall surface of the shell 3 is provided with a buckle groove 31 matched with the buckle boss 15.

[0029] Please refer to Figure 1 and Figure 5 , the sealing plug 2 is arranged in the shell 3, and the top end surface of the sealing plug 2 is flush with the top end surface of the shell 3; the conical tube 11 of the screw base connector 1 is inserted into the conical tube mounting groove 21 of the sealing plug 2, and the inner sealing plug ring 2a is clamped in the column groove 1a; the positioning column 12 of the screw base connector 1 is located in the shell 3, the buckle boss 15 is clamped in the buckle groove 31, and the bottom end of the sealing plug 2 is arranged at the top end of the positioning column 12; the bottom end of the shell 3 is located at the top end of the luer connector 13. The sealing plug 2 is made of elastic silica gel

[0030] Please refer to Figure 6 and Figure 7The conical tube 11 is located directly below the sealing seam 22. The sealing seam 22 is closed in a natural state, blocking the straight infusion channel 14. In the use state, the conical tube 11 pushes the sealing seam 22 upward, allowing the straight infusion channel 15 to infuse outward.

[0031] The zero residual positive pressure needle-free dosing connector of the present invention has a liquid cavity volume reserved due to the presence of the column groove 1a. Figure 6 ), the volume of the cavity is S1. The smaller the volume of the cavity S1, the smaller the residual amount. At this time, the inner ring 2a of the sealing plug is clamped in the column groove 1a. The volume of the cavity S1 is very small, which can save liquid and avoid waste. In the compressed state (see Figure 7 , that is, in use state), after the conical tube 11 moves upward, the inner clamping ring 2a of the sealing plug disengages from the column groove 1a. At this time, the volume of the cavity is S2, and the volume of the cavity S2 is greater than the volume of the cavity S1; when the conical tube 11 moves downward and resets, the inner clamping ring 2a of the sealing plug is stuck in the column groove 1a. During the elastic recovery process of the sealing plug 2, the inner clamping ring 2a of the sealing plug pushes the liquid toward the human body to form positive pressure, thereby realizing positive pressure infusion.

[0032] In the zero-residual positive-pressure needle-free dosing connector of the present invention, the upper portion 2b of the tapered tube mounting groove 21 is tapered to match the upper portion of the tapered tube 11. This allows the upper portion of the tapered tube 11 to be inserted into the upper portion 2b of the tapered tube mounting groove 21, further reducing the initial volume of the chamber (i.e., S1), thereby reducing residual liquid and preventing waste. The column groove 1a is located below the top opening of the direct infusion channel 14, facilitating direct delivery of liquid to the patient during repositioning.

[0033] The zero-residual positive pressure needle-free dosing connector of the present invention has the following functions:

[0034] (1) During the resetting process, the liquid in the column groove is squeezed toward the human body to achieve positive pressure infusion;

[0035] (2) The inner ring of the sealing plug is clamped into the groove of the column to achieve a tight seal in the initial state;

[0036] (3) Reduce the amount of liquid residue and avoid waste.

[0037] In summary, the zero-residue positive pressure needle-free dosing connector of the present invention has a simple structure. The combination of three accessories can achieve positive pressure infusion, and the residual drug liquid cannot be left in it during the dredging process, the residual amount is small, and waste is avoided.

[0038] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A zero residual positive pressure needle-free dosing connector, characterized in that: Consists of a screw base connector, a sealing plug and a housing, wherein: The screw-type base connector includes a tapered tube, a positioning post, and a Luer connector connected in sequence from top to bottom. An annular post groove is formed on the outer wall of the tapered tube along its circumference, and the post groove divides the tapered tube into upper and lower parts. The positioning post and the Luer connector are respectively provided with through holes extending vertically therethrough in the middle, and the through holes of the tapered tube, the positioning post, and the Luer connector are connected in sequence from top to bottom to form a straight infusion channel. The bottom end of the sealing plug is provided with a tapered tube mounting groove upwardly, and an inner clamping ring of the sealing plug is provided on the inner wall surface of the tapered tube mounting groove and is adapted to the column groove. The inner clamping ring of the sealing plug divides the tapered tube mounting groove into an upper part and a lower part. The upper part of the tapered tube mounting groove is in a tapered shape adapted to the upper part of the tapered tube; the top end of the sealing plug is provided with a sealing seam; The sealing plug is arranged in the shell, and the top surface of the sealing plug is flush with the top surface of the shell; The tapered tube of the screw base connector is inserted into the tapered tube mounting groove of the sealing plug, and the inner clamping ring of the sealing plug is clamped into the column groove; The positioning post of the screw base connector is located in the housing, and the bottom end of the sealing plug is arranged on the top end of the positioning post; The bottom end of the housing is located at the top end of the Luer connector. An annular snap-fitting boss is provided on the outer wall surface of the positioning column along its circumferential direction, and a snap-fitting groove adapted to the snap-fitting boss is provided on the inner wall surface of the shell, and the snap-fitting boss is snapped into the snap-fitting groove. The conical tube is located directly below the sealing seam, and the sealing seam is closed in a natural state.

2. A zero residual positive pressure needle-free dosing connector according to claim 1, characterized in that: The column groove is located below the top opening of the straight-through infusion channel.

3. The zero-residual positive pressure needle-free dosing connector according to claim 1, characterized in that: The sealing plug is made of elastic silicone.

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